2012-04-23 08:49:22

by Andreas Westin

[permalink] [raw]
Subject: [PATCH v6 0/3] crypto: ux500 crypto and hash driver

Changed HASH driver to use request for writable data instead of
tfm.

This adds a driver for the ST-Ericsson ux500 crypto hardware
module. It supports AES, DES and 3DES, the driver implements
support for AES-ECB,CBC and CTR.

Patches are also available at: http://www.df.lth.se/~triad/ux500-crypto/

Andreas Westin (3):
crypto: ux500: Add driver for CRYP hardware.
crypto: ux500: Add driver for HASH hardware
mach-ux500: Crypto: core support for CRYP/HASH module.

arch/arm/mach-ux500/board-mop500.c | 48 +
arch/arm/mach-ux500/board-u5500.c | 48 +
arch/arm/mach-ux500/clock.c | 18 +-
arch/arm/mach-ux500/devices-common.c | 16 +
arch/arm/mach-ux500/devices-common.h | 23 +
arch/arm/mach-ux500/devices-db5500.h | 4 +
arch/arm/mach-ux500/devices-db8500.h | 4 +
arch/arm/mach-ux500/include/mach/crypto-ux500.h | 21 +
arch/arm/mach-ux500/include/mach/devices.h | 3 +
arch/arm/mach-ux500/ste-dma40-db5500.h | 9 +-
drivers/crypto/Kconfig | 11 +
drivers/crypto/Makefile | 1 +
drivers/crypto/ux500/Kconfig | 30 +
drivers/crypto/ux500/Makefile | 8 +
drivers/crypto/ux500/cryp/Makefile | 13 +
drivers/crypto/ux500/cryp/cryp.c | 391 +++++
drivers/crypto/ux500/cryp/cryp.h | 308 ++++
drivers/crypto/ux500/cryp/cryp_core.c | 1785 ++++++++++++++++++++
drivers/crypto/ux500/cryp/cryp_irq.c | 45 +
drivers/crypto/ux500/cryp/cryp_irq.h | 31 +
drivers/crypto/ux500/cryp/cryp_irqp.h | 125 ++
drivers/crypto/ux500/cryp/cryp_p.h | 124 ++
drivers/crypto/ux500/hash/Makefile | 11 +
drivers/crypto/ux500/hash/hash_alg.h | 395 +++++
drivers/crypto/ux500/hash/hash_core.c | 2019 +++++++++++++++++++++++
25 files changed, 5480 insertions(+), 11 deletions(-)
create mode 100644 arch/arm/mach-ux500/include/mach/crypto-ux500.h
create mode 100644 drivers/crypto/ux500/Kconfig
create mode 100644 drivers/crypto/ux500/Makefile
create mode 100644 drivers/crypto/ux500/cryp/Makefile
create mode 100644 drivers/crypto/ux500/cryp/cryp.c
create mode 100644 drivers/crypto/ux500/cryp/cryp.h
create mode 100644 drivers/crypto/ux500/cryp/cryp_core.c
create mode 100644 drivers/crypto/ux500/cryp/cryp_irq.c
create mode 100644 drivers/crypto/ux500/cryp/cryp_irq.h
create mode 100644 drivers/crypto/ux500/cryp/cryp_irqp.h
create mode 100644 drivers/crypto/ux500/cryp/cryp_p.h
create mode 100644 drivers/crypto/ux500/hash/Makefile
create mode 100644 drivers/crypto/ux500/hash/hash_alg.h
create mode 100644 drivers/crypto/ux500/hash/hash_core.c

--
1.7.10


2012-04-23 08:49:22

by Andreas Westin

[permalink] [raw]
Subject: [PATCH v6 1/3] crypto: ux500: Add driver for CRYP hardware.

This adds a driver for the ST-Ericsson ux500 crypto hardware
module. It supports AES, DES and 3DES, the driver implements
support for AES-ECB,CBC and CTR.

Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Andreas Westin <[email protected]>
---
arch/arm/mach-ux500/include/mach/crypto-ux500.h | 16 +
drivers/crypto/Kconfig | 11 +
drivers/crypto/Makefile | 1 +
drivers/crypto/ux500/Kconfig | 21 +
drivers/crypto/ux500/Makefile | 7 +
drivers/crypto/ux500/cryp/Makefile | 13 +
drivers/crypto/ux500/cryp/cryp.c | 391 +++++
drivers/crypto/ux500/cryp/cryp.h | 308 ++++
drivers/crypto/ux500/cryp/cryp_core.c | 1785 +++++++++++++++++++++++
drivers/crypto/ux500/cryp/cryp_irq.c | 45 +
drivers/crypto/ux500/cryp/cryp_irq.h | 31 +
drivers/crypto/ux500/cryp/cryp_irqp.h | 125 ++
drivers/crypto/ux500/cryp/cryp_p.h | 124 ++
13 files changed, 2878 insertions(+)
create mode 100644 arch/arm/mach-ux500/include/mach/crypto-ux500.h
create mode 100644 drivers/crypto/ux500/Kconfig
create mode 100644 drivers/crypto/ux500/Makefile
create mode 100644 drivers/crypto/ux500/cryp/Makefile
create mode 100644 drivers/crypto/ux500/cryp/cryp.c
create mode 100644 drivers/crypto/ux500/cryp/cryp.h
create mode 100644 drivers/crypto/ux500/cryp/cryp_core.c
create mode 100644 drivers/crypto/ux500/cryp/cryp_irq.c
create mode 100644 drivers/crypto/ux500/cryp/cryp_irq.h
create mode 100644 drivers/crypto/ux500/cryp/cryp_irqp.h
create mode 100644 drivers/crypto/ux500/cryp/cryp_p.h

diff --git a/arch/arm/mach-ux500/include/mach/crypto-ux500.h b/arch/arm/mach-ux500/include/mach/crypto-ux500.h
new file mode 100644
index 0000000..c470567
--- /dev/null
+++ b/arch/arm/mach-ux500/include/mach/crypto-ux500.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ *
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#ifndef _CRYPTO_UX500_H
+#include <linux/dmaengine.h>
+#include <plat/ste_dma40.h>
+
+struct cryp_platform_data {
+ struct stedma40_chan_cfg mem_to_engine;
+ struct stedma40_chan_cfg engine_to_mem;
+};
+
+#endif
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index ab9abb4..aa72acd 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -295,4 +295,15 @@ config CRYPTO_DEV_TEGRA_AES
To compile this driver as a module, choose M here: the module
will be called tegra-aes.

+config CRYPTO_DEV_UX500
+ tristate "Driver for ST-Ericsson UX500 crypto hardware acceleration"
+ #depends on ARCH_UX500
+ select CRYPTO_ALGAPI
+ help
+ Driver for ST-Ericsson UX500 crypto engine.
+
+if CRYPTO_DEV_UX500
+ source "drivers/crypto/ux500/Kconfig"
+endif # if CRYPTO_DEV_UX500
+
endif # CRYPTO_HW
diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile
index f3e64ea..0139032 100644
--- a/drivers/crypto/Makefile
+++ b/drivers/crypto/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_CRYPTO_DEV_OMAP_AES) += omap-aes.o
obj-$(CONFIG_CRYPTO_DEV_PICOXCELL) += picoxcell_crypto.o
obj-$(CONFIG_CRYPTO_DEV_S5P) += s5p-sss.o
obj-$(CONFIG_CRYPTO_DEV_TEGRA_AES) += tegra-aes.o
+obj-$(CONFIG_CRYPTO_DEV_UX500) += ux500/
\ No newline at end of file
diff --git a/drivers/crypto/ux500/Kconfig b/drivers/crypto/ux500/Kconfig
new file mode 100644
index 0000000..b893fa0
--- /dev/null
+++ b/drivers/crypto/ux500/Kconfig
@@ -0,0 +1,21 @@
+#
+# Copyright (C) ST-Ericsson SA 2010
+# Author: Shujuan Chen ([email protected])
+# License terms: GNU General Public License (GPL) version 2
+#
+
+config CRYPTO_DEV_UX500_CRYP
+ tristate "UX500 crypto driver for CRYP block"
+ depends on CRYPTO_DEV_UX500
+ select CRYPTO_DES
+ help
+ This selects the crypto driver for the UX500_CRYP hardware. It supports
+ AES-ECB, CBC and CTR with keys sizes of 128, 192 and 256 bit sizes.
+
+config CRYPTO_DEV_UX500_DEBUG
+ bool "Activate ux500 platform debug-mode for crypto and hash block"
+ depends on CRYPTO_DEV_UX500_CRYP || CRYPTO_DEV_UX500_HASH
+ default n
+ help
+ Say Y if you want to add debug prints to ux500_hash and
+ ux500_cryp devices.
diff --git a/drivers/crypto/ux500/Makefile b/drivers/crypto/ux500/Makefile
new file mode 100644
index 0000000..beb4d37
--- /dev/null
+++ b/drivers/crypto/ux500/Makefile
@@ -0,0 +1,7 @@
+#
+# Copyright (C) ST-Ericsson SA 2010
+# Author: Shujuan Chen ([email protected])
+# License terms: GNU General Public License (GPL) version 2
+#
+
+obj-$(CONFIG_CRYPTO_DEV_UX500_CRYP) += cryp/
diff --git a/drivers/crypto/ux500/cryp/Makefile b/drivers/crypto/ux500/cryp/Makefile
new file mode 100644
index 0000000..e5d362a
--- /dev/null
+++ b/drivers/crypto/ux500/cryp/Makefile
@@ -0,0 +1,13 @@
+#/*
+# * Copyright (C) ST-Ericsson SA 2010
+# * Author: [email protected] for ST-Ericsson.
+# * License terms: GNU General Public License (GPL) version 2 */
+
+ifdef CONFIG_CRYPTO_DEV_UX500_DEBUG
+CFLAGS_cryp_core.o := -DDEBUG -O0
+CFLAGS_cryp.o := -DDEBUG -O0
+CFLAGS_cryp_irq.o := -DDEBUG -O0
+endif
+
+obj-$(CONFIG_CRYPTO_DEV_UX500_CRYP) += ux500_cryp.o
+ux500_cryp-objs := cryp.o cryp_irq.o cryp_core.o
diff --git a/drivers/crypto/ux500/cryp/cryp.c b/drivers/crypto/ux500/cryp/cryp.c
new file mode 100644
index 0000000..bd206ff
--- /dev/null
+++ b/drivers/crypto/ux500/cryp/cryp.c
@@ -0,0 +1,391 @@
+/**
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen <[email protected]> for ST-Ericsson.
+ * Author: Jonas Linde <[email protected]> for ST-Ericsson.
+ * Author: Niklas Hernaeus <[email protected]> for ST-Ericsson.
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson.
+ * Author: Berne Hebark <[email protected]> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#include <mach/hardware.h>
+
+#include "cryp_p.h"
+#include "cryp.h"
+
+/**
+ * cryp_wait_until_done - wait until the device logic is not busy
+ */
+void cryp_wait_until_done(struct cryp_device_data *device_data)
+{
+ while (cryp_is_logic_busy(device_data))
+ cpu_relax();
+}
+
+/**
+ * cryp_check - This routine checks Peripheral and PCell Id
+ * @device_data: Pointer to the device data struct for base address.
+ */
+int cryp_check(struct cryp_device_data *device_data)
+{
+ int peripheralid2 = 0;
+
+ if (NULL == device_data)
+ return -EINVAL;
+
+ if (cpu_is_u8500())
+ peripheralid2 = CRYP_PERIPHERAL_ID2_DB8500;
+ else if (cpu_is_u5500())
+ peripheralid2 = CRYP_PERIPHERAL_ID2_DB5500;
+
+ /* Check Peripheral and Pcell Id Register for CRYP */
+ if ((CRYP_PERIPHERAL_ID0 ==
+ readl_relaxed(&device_data->base->periphId0))
+ && (CRYP_PERIPHERAL_ID1 ==
+ readl_relaxed(&device_data->base->periphId1))
+ && (peripheralid2 ==
+ readl_relaxed(&device_data->base->periphId2))
+ && (CRYP_PERIPHERAL_ID3 ==
+ readl_relaxed(&device_data->base->periphId3))
+ && (CRYP_PCELL_ID0 ==
+ readl_relaxed(&device_data->base->pcellId0))
+ && (CRYP_PCELL_ID1 ==
+ readl_relaxed(&device_data->base->pcellId1))
+ && (CRYP_PCELL_ID2 ==
+ readl_relaxed(&device_data->base->pcellId2))
+ && (CRYP_PCELL_ID3 ==
+ readl_relaxed(&device_data->base->pcellId3))) {
+ return 0;
+ }
+
+ return -EPERM;
+}
+
+/**
+ * cryp_activity - This routine enables/disable the cryptography function.
+ * @device_data: Pointer to the device data struct for base address.
+ * @cryp_crypen: Enable/Disable functionality
+ */
+void cryp_activity(struct cryp_device_data *device_data,
+ enum cryp_crypen cryp_crypen)
+{
+ CRYP_PUT_BITS(&device_data->base->cr,
+ cryp_crypen,
+ CRYP_CR_CRYPEN_POS,
+ CRYP_CR_CRYPEN_MASK);
+}
+
+/**
+ * cryp_flush_inoutfifo - Resets both the input and the output FIFOs
+ * @device_data: Pointer to the device data struct for base address.
+ */
+void cryp_flush_inoutfifo(struct cryp_device_data *device_data)
+{
+ /*
+ * We always need to disble the hardware before trying to flush the
+ * FIFO. This is something that isn't written in the design
+ * specification, but we have been informed by the hardware designers
+ * that this must be done.
+ */
+ cryp_activity(device_data, CRYP_CRYPEN_DISABLE);
+ cryp_wait_until_done(device_data);
+
+ CRYP_SET_BITS(&device_data->base->cr, CRYP_CR_FFLUSH_MASK);
+ /*
+ * CRYP_SR_INFIFO_READY_MASK is the expected value on the status
+ * register when starting a new calculation, which means Input FIFO is
+ * not full and input FIFO is empty.
+ */
+ while (readl_relaxed(&device_data->base->sr) !=
+ CRYP_SR_INFIFO_READY_MASK)
+ cpu_relax();
+}
+
+/**
+ * cryp_set_configuration - This routine set the cr CRYP IP
+ * @device_data: Pointer to the device data struct for base address.
+ * @cryp_config: Pointer to the configuration parameter
+ * @control_register: The control register to be written later on.
+ */
+int cryp_set_configuration(struct cryp_device_data *device_data,
+ struct cryp_config *cryp_config,
+ u32 *control_register)
+{
+ u32 cr_for_kse;
+
+ if (NULL == device_data || NULL == cryp_config)
+ return -EINVAL;
+
+ *control_register |= (cryp_config->keysize << CRYP_CR_KEYSIZE_POS);
+
+ /* Prepare key for decryption in AES_ECB and AES_CBC mode. */
+ if ((CRYP_ALGORITHM_DECRYPT == cryp_config->algodir) &&
+ ((CRYP_ALGO_AES_ECB == cryp_config->algomode) ||
+ (CRYP_ALGO_AES_CBC == cryp_config->algomode))) {
+ cr_for_kse = *control_register;
+ /*
+ * This seems a bit odd, but it is indeed needed to set this to
+ * encrypt even though it is a decryption that we are doing. It
+ * also mentioned in the design spec that you need to do this.
+ * After the keyprepartion for decrypting is done you should set
+ * algodir back to decryption, which is done outside this if
+ * statement.
+ *
+ * According to design specification we should set mode ECB
+ * during key preparation even though we might be running CBC
+ * when enter this function.
+ *
+ * Writing to KSE_ENABLED will drop CRYPEN when key preparation
+ * is done. Therefore we need to set CRYPEN again outside this
+ * if statement when running decryption.
+ */
+ cr_for_kse |= ((CRYP_ALGORITHM_ENCRYPT << CRYP_CR_ALGODIR_POS) |
+ (CRYP_ALGO_AES_ECB << CRYP_CR_ALGOMODE_POS) |
+ (CRYP_CRYPEN_ENABLE << CRYP_CR_CRYPEN_POS) |
+ (KSE_ENABLED << CRYP_CR_KSE_POS));
+
+ writel_relaxed(cr_for_kse, &device_data->base->cr);
+ cryp_wait_until_done(device_data);
+ }
+
+ *control_register |=
+ ((cryp_config->algomode << CRYP_CR_ALGOMODE_POS) |
+ (cryp_config->algodir << CRYP_CR_ALGODIR_POS));
+
+ return 0;
+}
+
+/**
+ * cryp_configure_protection - set the protection bits in the CRYP logic.
+ * @device_data: Pointer to the device data struct for base address.
+ * @p_protect_config: Pointer to the protection mode and
+ * secure mode configuration
+ */
+int cryp_configure_protection(struct cryp_device_data *device_data,
+ struct cryp_protection_config *p_protect_config)
+{
+ if (NULL == p_protect_config)
+ return -EINVAL;
+
+ CRYP_WRITE_BIT(&device_data->base->cr,
+ (u32) p_protect_config->secure_access,
+ CRYP_CR_SECURE_MASK);
+ CRYP_PUT_BITS(&device_data->base->cr,
+ p_protect_config->privilege_access,
+ CRYP_CR_PRLG_POS,
+ CRYP_CR_PRLG_MASK);
+
+ return 0;
+}
+
+/**
+ * cryp_is_logic_busy - returns the busy status of the CRYP logic
+ * @device_data: Pointer to the device data struct for base address.
+ */
+int cryp_is_logic_busy(struct cryp_device_data *device_data)
+{
+ return CRYP_TEST_BITS(&device_data->base->sr,
+ CRYP_SR_BUSY_MASK);
+}
+
+/**
+ * cryp_configure_for_dma - configures the CRYP IP for DMA operation
+ * @device_data: Pointer to the device data struct for base address.
+ * @dma_req: Specifies the DMA request type value.
+ */
+void cryp_configure_for_dma(struct cryp_device_data *device_data,
+ enum cryp_dma_req_type dma_req)
+{
+ CRYP_SET_BITS(&device_data->base->dmacr,
+ (u32) dma_req);
+}
+
+/**
+ * cryp_configure_key_values - configures the key values for CRYP operations
+ * @device_data: Pointer to the device data struct for base address.
+ * @key_reg_index: Key value index register
+ * @key_value: The key value struct
+ */
+int cryp_configure_key_values(struct cryp_device_data *device_data,
+ enum cryp_key_reg_index key_reg_index,
+ struct cryp_key_value key_value)
+{
+ while (cryp_is_logic_busy(device_data))
+ cpu_relax();
+
+ switch (key_reg_index) {
+ case CRYP_KEY_REG_1:
+ writel_relaxed(key_value.key_value_left,
+ &device_data->base->key_1_l);
+ writel_relaxed(key_value.key_value_right,
+ &device_data->base->key_1_r);
+ break;
+ case CRYP_KEY_REG_2:
+ writel_relaxed(key_value.key_value_left,
+ &device_data->base->key_2_l);
+ writel_relaxed(key_value.key_value_right,
+ &device_data->base->key_2_r);
+ break;
+ case CRYP_KEY_REG_3:
+ writel_relaxed(key_value.key_value_left,
+ &device_data->base->key_3_l);
+ writel_relaxed(key_value.key_value_right,
+ &device_data->base->key_3_r);
+ break;
+ case CRYP_KEY_REG_4:
+ writel_relaxed(key_value.key_value_left,
+ &device_data->base->key_4_l);
+ writel_relaxed(key_value.key_value_right,
+ &device_data->base->key_4_r);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * cryp_configure_init_vector - configures the initialization vector register
+ * @device_data: Pointer to the device data struct for base address.
+ * @init_vector_index: Specifies the index of the init vector.
+ * @init_vector_value: Specifies the value for the init vector.
+ */
+int cryp_configure_init_vector(struct cryp_device_data *device_data,
+ enum cryp_init_vector_index
+ init_vector_index,
+ struct cryp_init_vector_value
+ init_vector_value)
+{
+ while (cryp_is_logic_busy(device_data))
+ cpu_relax();
+
+ switch (init_vector_index) {
+ case CRYP_INIT_VECTOR_INDEX_0:
+ writel_relaxed(init_vector_value.init_value_left,
+ &device_data->base->init_vect_0_l);
+ writel_relaxed(init_vector_value.init_value_right,
+ &device_data->base->init_vect_0_r);
+ break;
+ case CRYP_INIT_VECTOR_INDEX_1:
+ writel_relaxed(init_vector_value.init_value_left,
+ &device_data->base->init_vect_1_l);
+ writel_relaxed(init_vector_value.init_value_right,
+ &device_data->base->init_vect_1_r);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * cryp_save_device_context - Store hardware registers and
+ * other device context parameter
+ * @device_data: Pointer to the device data struct for base address.
+ * @ctx: Crypto device context
+ */
+void cryp_save_device_context(struct cryp_device_data *device_data,
+ struct cryp_device_context *ctx,
+ int cryp_mode)
+{
+ enum cryp_algo_mode algomode;
+ struct cryp_register *src_reg = device_data->base;
+ struct cryp_config *config =
+ (struct cryp_config *)device_data->current_ctx;
+
+ /*
+ * Always start by disable the hardware and wait for it to finish the
+ * ongoing calculations before trying to reprogram it.
+ */
+ cryp_activity(device_data, CRYP_CRYPEN_DISABLE);
+ cryp_wait_until_done(device_data);
+
+ if (cryp_mode == CRYP_MODE_DMA)
+ cryp_configure_for_dma(device_data, CRYP_DMA_DISABLE_BOTH);
+
+ if (CRYP_TEST_BITS(&src_reg->sr, CRYP_SR_IFEM_MASK) == 0)
+ ctx->din = readl_relaxed(&src_reg->din);
+
+ ctx->cr = readl_relaxed(&src_reg->cr) & CRYP_CR_CONTEXT_SAVE_MASK;
+
+ switch (config->keysize) {
+ case CRYP_KEY_SIZE_256:
+ ctx->key_4_l = readl_relaxed(&src_reg->key_4_l);
+ ctx->key_4_r = readl_relaxed(&src_reg->key_4_r);
+
+ case CRYP_KEY_SIZE_192:
+ ctx->key_3_l = readl_relaxed(&src_reg->key_3_l);
+ ctx->key_3_r = readl_relaxed(&src_reg->key_3_r);
+
+ case CRYP_KEY_SIZE_128:
+ ctx->key_2_l = readl_relaxed(&src_reg->key_2_l);
+ ctx->key_2_r = readl_relaxed(&src_reg->key_2_r);
+
+ default:
+ ctx->key_1_l = readl_relaxed(&src_reg->key_1_l);
+ ctx->key_1_r = readl_relaxed(&src_reg->key_1_r);
+ }
+
+ /* Save IV for CBC mode for both AES and DES. */
+ algomode = ((ctx->cr & CRYP_CR_ALGOMODE_MASK) >> CRYP_CR_ALGOMODE_POS);
+ if (algomode == CRYP_ALGO_TDES_CBC ||
+ algomode == CRYP_ALGO_DES_CBC ||
+ algomode == CRYP_ALGO_AES_CBC) {
+ ctx->init_vect_0_l = readl_relaxed(&src_reg->init_vect_0_l);
+ ctx->init_vect_0_r = readl_relaxed(&src_reg->init_vect_0_r);
+ ctx->init_vect_1_l = readl_relaxed(&src_reg->init_vect_1_l);
+ ctx->init_vect_1_r = readl_relaxed(&src_reg->init_vect_1_r);
+ }
+}
+
+/**
+ * cryp_restore_device_context - Restore hardware registers and
+ * other device context parameter
+ * @device_data: Pointer to the device data struct for base address.
+ * @ctx: Crypto device context
+ */
+void cryp_restore_device_context(struct cryp_device_data *device_data,
+ struct cryp_device_context *ctx)
+{
+ struct cryp_register *reg = device_data->base;
+ struct cryp_config *config =
+ (struct cryp_config *)device_data->current_ctx;
+
+ /*
+ * Fall through for all items in switch statement. DES is captured in
+ * the default.
+ */
+ switch (config->keysize) {
+ case CRYP_KEY_SIZE_256:
+ writel_relaxed(ctx->key_4_l, &reg->key_4_l);
+ writel_relaxed(ctx->key_4_r, &reg->key_4_r);
+
+ case CRYP_KEY_SIZE_192:
+ writel_relaxed(ctx->key_3_l, &reg->key_3_l);
+ writel_relaxed(ctx->key_3_r, &reg->key_3_r);
+
+ case CRYP_KEY_SIZE_128:
+ writel_relaxed(ctx->key_2_l, &reg->key_2_l);
+ writel_relaxed(ctx->key_2_r, &reg->key_2_r);
+
+ default:
+ writel_relaxed(ctx->key_1_l, &reg->key_1_l);
+ writel_relaxed(ctx->key_1_r, &reg->key_1_r);
+ }
+
+ /* Restore IV for CBC mode for AES and DES. */
+ if (config->algomode == CRYP_ALGO_TDES_CBC ||
+ config->algomode == CRYP_ALGO_DES_CBC ||
+ config->algomode == CRYP_ALGO_AES_CBC) {
+ writel_relaxed(ctx->init_vect_0_l, &reg->init_vect_0_l);
+ writel_relaxed(ctx->init_vect_0_r, &reg->init_vect_0_r);
+ writel_relaxed(ctx->init_vect_1_l, &reg->init_vect_1_l);
+ writel_relaxed(ctx->init_vect_1_r, &reg->init_vect_1_r);
+ }
+}
diff --git a/drivers/crypto/ux500/cryp/cryp.h b/drivers/crypto/ux500/cryp/cryp.h
new file mode 100644
index 0000000..14cfd05
--- /dev/null
+++ b/drivers/crypto/ux500/cryp/cryp.h
@@ -0,0 +1,308 @@
+/**
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen <[email protected]> for ST-Ericsson.
+ * Author: Jonas Linde <[email protected]> for ST-Ericsson.
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson.
+ * Author: Berne Hebark <[email protected]> for ST-Ericsson.
+ * Author: Niklas Hernaeus <nikla[email protected]> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef _CRYP_H_
+#define _CRYP_H_
+
+#include <linux/completion.h>
+#include <linux/dmaengine.h>
+#include <linux/klist.h>
+#include <linux/mutex.h>
+
+#define DEV_DBG_NAME "crypX crypX:"
+
+/* CRYP enable/disable */
+enum cryp_crypen {
+ CRYP_CRYPEN_DISABLE = 0,
+ CRYP_CRYPEN_ENABLE = 1
+};
+
+/* CRYP Start Computation enable/disable */
+enum cryp_start {
+ CRYP_START_DISABLE = 0,
+ CRYP_START_ENABLE = 1
+};
+
+/* CRYP Init Signal enable/disable */
+enum cryp_init {
+ CRYP_INIT_DISABLE = 0,
+ CRYP_INIT_ENABLE = 1
+};
+
+/* Cryp State enable/disable */
+enum cryp_state {
+ CRYP_STATE_DISABLE = 0,
+ CRYP_STATE_ENABLE = 1
+};
+
+/* Key preparation bit enable */
+enum cryp_key_prep {
+ KSE_DISABLED = 0,
+ KSE_ENABLED = 1
+};
+
+/* Key size for AES */
+#define CRYP_KEY_SIZE_128 (0)
+#define CRYP_KEY_SIZE_192 (1)
+#define CRYP_KEY_SIZE_256 (2)
+
+/* AES modes */
+enum cryp_algo_mode {
+ CRYP_ALGO_TDES_ECB,
+ CRYP_ALGO_TDES_CBC,
+ CRYP_ALGO_DES_ECB,
+ CRYP_ALGO_DES_CBC,
+ CRYP_ALGO_AES_ECB,
+ CRYP_ALGO_AES_CBC,
+ CRYP_ALGO_AES_CTR,
+ CRYP_ALGO_AES_XTS
+};
+
+/* Cryp Encryption or Decryption */
+enum cryp_algorithm_dir {
+ CRYP_ALGORITHM_ENCRYPT,
+ CRYP_ALGORITHM_DECRYPT
+};
+
+/* Hardware access method */
+enum cryp_mode {
+ CRYP_MODE_POLLING,
+ CRYP_MODE_INTERRUPT,
+ CRYP_MODE_DMA
+};
+
+/**
+ * struct cryp_config -
+ * @keysize: Key size for AES
+ * @algomode: AES modes
+ * @algodir: Cryp Encryption or Decryption
+ *
+ * CRYP configuration structure to be passed to set configuration
+ */
+struct cryp_config {
+ int keysize;
+ enum cryp_algo_mode algomode;
+ enum cryp_algorithm_dir algodir;
+};
+
+/**
+ * struct cryp_protection_config -
+ * @privilege_access: Privileged cryp state enable/disable
+ * @secure_access: Secure cryp state enable/disable
+ *
+ * Protection configuration structure for setting privilage access
+ */
+struct cryp_protection_config {
+ enum cryp_state privilege_access;
+ enum cryp_state secure_access;
+};
+
+/* Cryp status */
+enum cryp_status_id {
+ CRYP_STATUS_BUSY = 0x10,
+ CRYP_STATUS_OUTPUT_FIFO_FULL = 0x08,
+ CRYP_STATUS_OUTPUT_FIFO_NOT_EMPTY = 0x04,
+ CRYP_STATUS_INPUT_FIFO_NOT_FULL = 0x02,
+ CRYP_STATUS_INPUT_FIFO_EMPTY = 0x01
+};
+
+/* Cryp DMA interface */
+enum cryp_dma_req_type {
+ CRYP_DMA_DISABLE_BOTH,
+ CRYP_DMA_ENABLE_IN_DATA,
+ CRYP_DMA_ENABLE_OUT_DATA,
+ CRYP_DMA_ENABLE_BOTH_DIRECTIONS
+};
+
+enum cryp_dma_channel {
+ CRYP_DMA_RX = 0,
+ CRYP_DMA_TX
+};
+
+/* Key registers */
+enum cryp_key_reg_index {
+ CRYP_KEY_REG_1,
+ CRYP_KEY_REG_2,
+ CRYP_KEY_REG_3,
+ CRYP_KEY_REG_4
+};
+
+/* Key register left and right */
+struct cryp_key_value {
+ u32 key_value_left;
+ u32 key_value_right;
+};
+
+/* Cryp Initialization structure */
+enum cryp_init_vector_index {
+ CRYP_INIT_VECTOR_INDEX_0,
+ CRYP_INIT_VECTOR_INDEX_1
+};
+
+/* struct cryp_init_vector_value -
+ * @init_value_left
+ * @init_value_right
+ * */
+struct cryp_init_vector_value {
+ u32 init_value_left;
+ u32 init_value_right;
+};
+
+/**
+ * struct cryp_device_context - structure for a cryp context.
+ * @cr: control register
+ * @dmacr: DMA control register
+ * @imsc: Interrupt mask set/clear register
+ * @key_1_l: Key 1l register
+ * @key_1_r: Key 1r register
+ * @key_2_l: Key 2l register
+ * @key_2_r: Key 2r register
+ * @key_3_l: Key 3l register
+ * @key_3_r: Key 3r register
+ * @key_4_l: Key 4l register
+ * @key_4_r: Key 4r register
+ * @init_vect_0_l: Initialization vector 0l register
+ * @init_vect_0_r: Initialization vector 0r register
+ * @init_vect_1_l: Initialization vector 1l register
+ * @init_vect_1_r: Initialization vector 0r register
+ * @din: Data in register
+ * @dout: Data out register
+ *
+ * CRYP power management specifc structure.
+ */
+struct cryp_device_context {
+ u32 cr;
+ u32 dmacr;
+ u32 imsc;
+
+ u32 key_1_l;
+ u32 key_1_r;
+ u32 key_2_l;
+ u32 key_2_r;
+ u32 key_3_l;
+ u32 key_3_r;
+ u32 key_4_l;
+ u32 key_4_r;
+
+ u32 init_vect_0_l;
+ u32 init_vect_0_r;
+ u32 init_vect_1_l;
+ u32 init_vect_1_r;
+
+ u32 din;
+ u32 dout;
+};
+
+struct cryp_dma {
+ dma_cap_mask_t mask;
+ struct completion cryp_dma_complete;
+ struct dma_chan *chan_cryp2mem;
+ struct dma_chan *chan_mem2cryp;
+ struct stedma40_chan_cfg *cfg_cryp2mem;
+ struct stedma40_chan_cfg *cfg_mem2cryp;
+ int sg_src_len;
+ int sg_dst_len;
+ struct scatterlist *sg_src;
+ struct scatterlist *sg_dst;
+ int nents_src;
+ int nents_dst;
+};
+
+/**
+ * struct cryp_device_data - structure for a cryp device.
+ * @base: Pointer to the hardware base address.
+ * @dev: Pointer to the devices dev structure.
+ * @clk: Pointer to the device's clock control.
+ * @pwr_regulator: Pointer to the device's power control.
+ * @power_status: Current status of the power.
+ * @ctx_lock: Lock for current_ctx.
+ * @current_ctx: Pointer to the currently allocated context.
+ * @list_node: For inclusion into a klist.
+ * @dma: The dma structure holding channel configuration.
+ * @power_state: TRUE = power state on, FALSE = power state off.
+ * @power_state_spinlock: Spinlock for power_state.
+ * @restore_dev_ctx: TRUE = saved ctx, FALSE = no saved ctx.
+ */
+struct cryp_device_data {
+ struct cryp_register __iomem *base;
+ struct device *dev;
+ struct clk *clk;
+ struct regulator *pwr_regulator;
+ int power_status;
+ struct spinlock ctx_lock;
+ struct cryp_ctx *current_ctx;
+ struct klist_node list_node;
+ struct cryp_dma dma;
+ bool power_state;
+ struct spinlock power_state_spinlock;
+ bool restore_dev_ctx;
+};
+
+void cryp_wait_until_done(struct cryp_device_data *device_data);
+
+/* Initialization functions */
+
+int cryp_check(struct cryp_device_data *device_data);
+
+void cryp_activity(struct cryp_device_data *device_data,
+ enum cryp_crypen cryp_crypen);
+
+void cryp_flush_inoutfifo(struct cryp_device_data *device_data);
+
+int cryp_set_configuration(struct cryp_device_data *device_data,
+ struct cryp_config *cryp_config,
+ u32 *control_register);
+
+void cryp_configure_for_dma(struct cryp_device_data *device_data,
+ enum cryp_dma_req_type dma_req);
+
+int cryp_configure_key_values(struct cryp_device_data *device_data,
+ enum cryp_key_reg_index key_reg_index,
+ struct cryp_key_value key_value);
+
+int cryp_configure_init_vector(struct cryp_device_data *device_data,
+ enum cryp_init_vector_index
+ init_vector_index,
+ struct cryp_init_vector_value
+ init_vector_value);
+
+int cryp_configure_protection(struct cryp_device_data *device_data,
+ struct cryp_protection_config *p_protect_config);
+
+/* Power management funtions */
+void cryp_save_device_context(struct cryp_device_data *device_data,
+ struct cryp_device_context *ctx,
+ int cryp_mode);
+
+void cryp_restore_device_context(struct cryp_device_data *device_data,
+ struct cryp_device_context *ctx);
+
+/* Data transfer and status bits. */
+int cryp_is_logic_busy(struct cryp_device_data *device_data);
+
+int cryp_get_status(struct cryp_device_data *device_data);
+
+/**
+ * cryp_write_indata - This routine writes 32 bit data into the data input
+ * register of the cryptography IP.
+ * @device_data: Pointer to the device data struct for base address.
+ * @write_data: Data to write.
+ */
+int cryp_write_indata(struct cryp_device_data *device_data, u32 write_data);
+
+/**
+ * cryp_read_outdata - This routine reads the data from the data output
+ * register of the CRYP logic
+ * @device_data: Pointer to the device data struct for base address.
+ * @read_data: Read the data from the output FIFO.
+ */
+int cryp_read_outdata(struct cryp_device_data *device_data, u32 *read_data);
+
+#endif /* _CRYP_H_ */
diff --git a/drivers/crypto/ux500/cryp/cryp_core.c b/drivers/crypto/ux500/cryp/cryp_core.c
new file mode 100644
index 0000000..7051e00
--- /dev/null
+++ b/drivers/crypto/ux500/cryp/cryp_core.c
@@ -0,0 +1,1785 @@
+/**
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen <[email protected]> for ST-Ericsson.
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson.
+ * Author: Berne Hebark <[email protected]> for ST-Ericsson.
+ * Author: Niklas Hernaeus <[email protected]> for ST-Ericsson.
+ * Author: Jonas Linde <[email protected]> for ST-Ericsson.
+ * Author: Andreas Westin <[email protected]> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/crypto.h>
+#include <linux/dmaengine.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irqreturn.h>
+#include <linux/klist.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/semaphore.h>
+
+#include <crypto/aes.h>
+#include <crypto/algapi.h>
+#include <crypto/ctr.h>
+#include <crypto/des.h>
+#include <crypto/scatterwalk.h>
+
+#include <plat/ste_dma40.h>
+
+#include <mach/crypto-ux500.h>
+#include <mach/hardware.h>
+
+#include "cryp_p.h"
+#include "cryp.h"
+
+#define CRYP_MAX_KEY_SIZE 32
+#define BYTES_PER_WORD 4
+
+static int cryp_mode;
+static atomic_t session_id;
+
+static struct stedma40_chan_cfg *mem_to_engine;
+static struct stedma40_chan_cfg *engine_to_mem;
+
+/**
+ * struct cryp_driver_data - data specific to the driver.
+ *
+ * @device_list: A list of registered devices to choose from.
+ * @device_allocation: A semaphore initialized with number of devices.
+ */
+struct cryp_driver_data {
+ struct klist device_list;
+ struct semaphore device_allocation;
+};
+
+/**
+ * struct cryp_ctx - Crypto context
+ * @config: Crypto mode.
+ * @key[CRYP_MAX_KEY_SIZE]: Key.
+ * @keylen: Length of key.
+ * @iv: Pointer to initialization vector.
+ * @indata: Pointer to indata.
+ * @outdata: Pointer to outdata.
+ * @datalen: Length of indata.
+ * @outlen: Length of outdata.
+ * @blocksize: Size of blocks.
+ * @updated: Updated flag.
+ * @dev_ctx: Device dependent context.
+ * @device: Pointer to the device.
+ */
+struct cryp_ctx {
+ struct cryp_config config;
+ u8 key[CRYP_MAX_KEY_SIZE];
+ u32 keylen;
+ u8 *iv;
+ const u8 *indata;
+ u8 *outdata;
+ u32 datalen;
+ u32 outlen;
+ u32 blocksize;
+ u8 updated;
+ struct cryp_device_context dev_ctx;
+ struct cryp_device_data *device;
+ u32 session_id;
+};
+
+static struct cryp_driver_data driver_data;
+
+/**
+ * uint8p_to_uint32_be - 4*uint8 to uint32 big endian
+ * @in: Data to convert.
+ */
+static inline u32 uint8p_to_uint32_be(u8 *in)
+{
+ u32 *data = (u32 *)in;
+
+ return cpu_to_be32p(data);
+}
+
+/**
+ * swap_bits_in_byte - mirror the bits in a byte
+ * @b: the byte to be mirrored
+ *
+ * The bits are swapped the following way:
+ * Byte b include bits 0-7, nibble 1 (n1) include bits 0-3 and
+ * nibble 2 (n2) bits 4-7.
+ *
+ * Nibble 1 (n1):
+ * (The "old" (moved) bit is replaced with a zero)
+ * 1. Move bit 6 and 7, 4 positions to the left.
+ * 2. Move bit 3 and 5, 2 positions to the left.
+ * 3. Move bit 1-4, 1 position to the left.
+ *
+ * Nibble 2 (n2):
+ * 1. Move bit 0 and 1, 4 positions to the right.
+ * 2. Move bit 2 and 4, 2 positions to the right.
+ * 3. Move bit 3-6, 1 position to the right.
+ *
+ * Combine the two nibbles to a complete and swapped byte.
+ */
+
+static inline u8 swap_bits_in_byte(u8 b)
+{
+#define R_SHIFT_4_MASK 0xc0 /* Bits 6 and 7, right shift 4 */
+#define R_SHIFT_2_MASK 0x28 /* (After right shift 4) Bits 3 and 5,
+ right shift 2 */
+#define R_SHIFT_1_MASK 0x1e /* (After right shift 2) Bits 1-4,
+ right shift 1 */
+#define L_SHIFT_4_MASK 0x03 /* Bits 0 and 1, left shift 4 */
+#define L_SHIFT_2_MASK 0x14 /* (After left shift 4) Bits 2 and 4,
+ left shift 2 */
+#define L_SHIFT_1_MASK 0x78 /* (After left shift 1) Bits 3-6,
+ left shift 1 */
+
+ u8 n1;
+ u8 n2;
+
+ /* Swap most significant nibble */
+ /* Right shift 4, bits 6 and 7 */
+ n1 = ((b & R_SHIFT_4_MASK) >> 4) | (b & ~(R_SHIFT_4_MASK >> 4));
+ /* Right shift 2, bits 3 and 5 */
+ n1 = ((n1 & R_SHIFT_2_MASK) >> 2) | (n1 & ~(R_SHIFT_2_MASK >> 2));
+ /* Right shift 1, bits 1-4 */
+ n1 = (n1 & R_SHIFT_1_MASK) >> 1;
+
+ /* Swap least significant nibble */
+ /* Left shift 4, bits 0 and 1 */
+ n2 = ((b & L_SHIFT_4_MASK) << 4) | (b & ~(L_SHIFT_4_MASK << 4));
+ /* Left shift 2, bits 2 and 4 */
+ n2 = ((n2 & L_SHIFT_2_MASK) << 2) | (n2 & ~(L_SHIFT_2_MASK << 2));
+ /* Left shift 1, bits 3-6 */
+ n2 = (n2 & L_SHIFT_1_MASK) << 1;
+
+ return n1 | n2;
+}
+
+static inline void swap_words_in_key_and_bits_in_byte(const u8 *in,
+ u8 *out, u32 len)
+{
+ unsigned int i = 0;
+ int j;
+ int index = 0;
+
+ j = len - BYTES_PER_WORD;
+ while (j >= 0) {
+ for (i = 0; i < BYTES_PER_WORD; i++) {
+ index = len - j - BYTES_PER_WORD + i;
+ out[j + i] =
+ swap_bits_in_byte(in[index]);
+ }
+ j -= BYTES_PER_WORD;
+ }
+}
+
+static void add_session_id(struct cryp_ctx *ctx)
+{
+ /*
+ * We never want 0 to be a valid value, since this is the default value
+ * for the software context.
+ */
+ if (unlikely(atomic_inc_and_test(&session_id)))
+ atomic_inc(&session_id);
+
+ ctx->session_id = atomic_read(&session_id);
+}
+
+static irqreturn_t cryp_interrupt_handler(int irq, void *param)
+{
+ struct cryp_ctx *ctx;
+ int i;
+ struct cryp_device_data *device_data;
+
+ if (param == NULL) {
+ BUG_ON(!param);
+ return IRQ_HANDLED;
+ }
+
+ /* The device is coming from the one found in hw_crypt_noxts. */
+ device_data = (struct cryp_device_data *)param;
+
+ ctx = device_data->current_ctx;
+
+ if (ctx == NULL) {
+ BUG_ON(!ctx);
+ return IRQ_HANDLED;
+ }
+
+ dev_dbg(ctx->device->dev, "[%s] (len: %d) %s, ", __func__, ctx->outlen,
+ cryp_pending_irq_src(device_data, CRYP_IRQ_SRC_OUTPUT_FIFO) ?
+ "out" : "in");
+
+ if (cryp_pending_irq_src(device_data,
+ CRYP_IRQ_SRC_OUTPUT_FIFO)) {
+ if (ctx->outlen / ctx->blocksize > 0) {
+ for (i = 0; i < ctx->blocksize / 4; i++) {
+ *(ctx->outdata) = readl_relaxed(
+ &device_data->base->dout);
+ ctx->outdata += 4;
+ ctx->outlen -= 4;
+ }
+
+ if (ctx->outlen == 0) {
+ cryp_disable_irq_src(device_data,
+ CRYP_IRQ_SRC_OUTPUT_FIFO);
+ }
+ }
+ } else if (cryp_pending_irq_src(device_data,
+ CRYP_IRQ_SRC_INPUT_FIFO)) {
+ if (ctx->datalen / ctx->blocksize > 0) {
+ for (i = 0 ; i < ctx->blocksize / 4; i++) {
+ writel_relaxed(ctx->indata,
+ &device_data->base->din);
+ ctx->indata += 4;
+ ctx->datalen -= 4;
+ }
+
+ if (ctx->datalen == 0)
+ cryp_disable_irq_src(device_data,
+ CRYP_IRQ_SRC_INPUT_FIFO);
+
+ if (ctx->config.algomode == CRYP_ALGO_AES_XTS) {
+ CRYP_PUT_BITS(&device_data->base->cr,
+ CRYP_START_ENABLE,
+ CRYP_CR_START_POS,
+ CRYP_CR_START_MASK);
+
+ cryp_wait_until_done(device_data);
+ }
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int mode_is_aes(enum cryp_algo_mode mode)
+{
+ return CRYP_ALGO_AES_ECB == mode ||
+ CRYP_ALGO_AES_CBC == mode ||
+ CRYP_ALGO_AES_CTR == mode ||
+ CRYP_ALGO_AES_XTS == mode;
+}
+
+static int cfg_iv(struct cryp_device_data *device_data, u32 left, u32 right,
+ enum cryp_init_vector_index index)
+{
+ struct cryp_init_vector_value vector_value;
+
+ dev_dbg(device_data->dev, "[%s]", __func__);
+
+ vector_value.init_value_left = left;
+ vector_value.init_value_right = right;
+
+ return cryp_configure_init_vector(device_data,
+ index,
+ vector_value);
+}
+
+static int cfg_ivs(struct cryp_device_data *device_data, struct cryp_ctx *ctx)
+{
+ int i;
+ int status = 0;
+ int num_of_regs = ctx->blocksize / 8;
+ u32 iv[AES_BLOCK_SIZE / 4];
+
+ dev_dbg(device_data->dev, "[%s]", __func__);
+
+ /*
+ * Since we loop on num_of_regs we need to have a check in case
+ * someone provides an incorrect blocksize which would force calling
+ * cfg_iv with i greater than 2 which is an error.
+ */
+ if (num_of_regs > 2) {
+ dev_err(device_data->dev, "[%s] Incorrect blocksize %d",
+ __func__, ctx->blocksize);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ctx->blocksize / 4; i++)
+ iv[i] = uint8p_to_uint32_be(ctx->iv + i*4);
+
+ for (i = 0; i < num_of_regs; i++) {
+ status = cfg_iv(device_data, iv[i*2], iv[i*2+1],
+ (enum cryp_init_vector_index) i);
+ if (status != 0)
+ return status;
+ }
+ return status;
+}
+
+static int set_key(struct cryp_device_data *device_data,
+ u32 left_key,
+ u32 right_key,
+ enum cryp_key_reg_index index)
+{
+ struct cryp_key_value key_value;
+ int cryp_error;
+
+ dev_dbg(device_data->dev, "[%s]", __func__);
+
+ key_value.key_value_left = left_key;
+ key_value.key_value_right = right_key;
+
+ cryp_error = cryp_configure_key_values(device_data,
+ index,
+ key_value);
+ if (cryp_error != 0)
+ dev_err(device_data->dev, "[%s]: "
+ "cryp_configure_key_values() failed!", __func__);
+
+ return cryp_error;
+}
+
+static int cfg_keys(struct cryp_ctx *ctx)
+{
+ int i;
+ int num_of_regs = ctx->keylen / 8;
+ u32 swapped_key[CRYP_MAX_KEY_SIZE / 4];
+ int cryp_error = 0;
+
+ dev_dbg(ctx->device->dev, "[%s]", __func__);
+
+ if (mode_is_aes(ctx->config.algomode)) {
+ swap_words_in_key_and_bits_in_byte((u8 *)ctx->key,
+ (u8 *)swapped_key,
+ ctx->keylen);
+ } else {
+ for (i = 0; i < ctx->keylen / 4; i++)
+ swapped_key[i] = uint8p_to_uint32_be(ctx->key + i*4);
+ }
+
+ for (i = 0; i < num_of_regs; i++) {
+ cryp_error = set_key(ctx->device,
+ *(((u32 *)swapped_key)+i*2),
+ *(((u32 *)swapped_key)+i*2+1),
+ (enum cryp_key_reg_index) i);
+
+ if (cryp_error != 0) {
+ dev_err(ctx->device->dev, "[%s]: set_key() failed!",
+ __func__);
+ return cryp_error;
+ }
+ }
+ return cryp_error;
+}
+
+static int cryp_setup_context(struct cryp_ctx *ctx,
+ struct cryp_device_data *device_data)
+{
+ u32 control_register = CRYP_CR_DEFAULT;
+
+ switch (cryp_mode) {
+ case CRYP_MODE_INTERRUPT:
+ writel_relaxed(CRYP_IMSC_DEFAULT, &device_data->base->imsc);
+ break;
+
+ case CRYP_MODE_DMA:
+ writel_relaxed(CRYP_DMACR_DEFAULT, &device_data->base->dmacr);
+ break;
+
+ default:
+ break;
+ }
+
+ if (ctx->updated == 0) {
+ cryp_flush_inoutfifo(device_data);
+ if (cfg_keys(ctx) != 0) {
+ dev_err(ctx->device->dev, "[%s]: cfg_keys failed!",
+ __func__);
+ return -EINVAL;
+ }
+
+ if (ctx->iv &&
+ CRYP_ALGO_AES_ECB != ctx->config.algomode &&
+ CRYP_ALGO_DES_ECB != ctx->config.algomode &&
+ CRYP_ALGO_TDES_ECB != ctx->config.algomode) {
+ if (cfg_ivs(device_data, ctx) != 0)
+ return -EPERM;
+ }
+
+ cryp_set_configuration(device_data, &ctx->config,
+ &control_register);
+ add_session_id(ctx);
+ } else if (ctx->updated == 1 &&
+ ctx->session_id != atomic_read(&session_id)) {
+ cryp_flush_inoutfifo(device_data);
+ cryp_restore_device_context(device_data, &ctx->dev_ctx);
+
+ add_session_id(ctx);
+ control_register = ctx->dev_ctx.cr;
+ } else
+ control_register = ctx->dev_ctx.cr;
+
+ writel(control_register |
+ (CRYP_CRYPEN_ENABLE << CRYP_CR_CRYPEN_POS),
+ &device_data->base->cr);
+
+ return 0;
+}
+
+static int cryp_get_device_data(struct cryp_ctx *ctx,
+ struct cryp_device_data **device_data)
+{
+ int ret;
+ struct klist_iter device_iterator;
+ struct klist_node *device_node;
+ struct cryp_device_data *local_device_data = NULL;
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+
+ /* Wait until a device is available */
+ ret = down_interruptible(&driver_data.device_allocation);
+ if (ret)
+ return ret; /* Interrupted */
+
+ /* Select a device */
+ klist_iter_init(&driver_data.device_list, &device_iterator);
+
+ device_node = klist_next(&device_iterator);
+ while (device_node) {
+ local_device_data = container_of(device_node,
+ struct cryp_device_data, list_node);
+ spin_lock(&local_device_data->ctx_lock);
+ /* current_ctx allocates a device, NULL = unallocated */
+ if (local_device_data->current_ctx) {
+ device_node = klist_next(&device_iterator);
+ } else {
+ local_device_data->current_ctx = ctx;
+ ctx->device = local_device_data;
+ spin_unlock(&local_device_data->ctx_lock);
+ break;
+ }
+ spin_unlock(&local_device_data->ctx_lock);
+ }
+ klist_iter_exit(&device_iterator);
+
+ if (!device_node) {
+ /**
+ * No free device found.
+ * Since we allocated a device with down_interruptible, this
+ * should not be able to happen.
+ * Number of available devices, which are contained in
+ * device_allocation, is therefore decremented by not doing
+ * an up(device_allocation).
+ */
+ return -EBUSY;
+ }
+
+ *device_data = local_device_data;
+
+ return 0;
+}
+
+static void cryp_dma_setup_channel(struct cryp_device_data *device_data,
+ struct device *dev)
+{
+ dma_cap_zero(device_data->dma.mask);
+ dma_cap_set(DMA_SLAVE, device_data->dma.mask);
+
+ device_data->dma.cfg_mem2cryp = mem_to_engine;
+ device_data->dma.chan_mem2cryp =
+ dma_request_channel(device_data->dma.mask,
+ stedma40_filter,
+ device_data->dma.cfg_mem2cryp);
+
+ device_data->dma.cfg_cryp2mem = engine_to_mem;
+ device_data->dma.chan_cryp2mem =
+ dma_request_channel(device_data->dma.mask,
+ stedma40_filter,
+ device_data->dma.cfg_cryp2mem);
+
+ init_completion(&device_data->dma.cryp_dma_complete);
+}
+
+static void cryp_dma_out_callback(void *data)
+{
+ struct cryp_ctx *ctx = (struct cryp_ctx *) data;
+ dev_dbg(ctx->device->dev, "[%s]: ", __func__);
+
+ complete(&ctx->device->dma.cryp_dma_complete);
+}
+
+static int cryp_set_dma_transfer(struct cryp_ctx *ctx,
+ struct scatterlist *sg,
+ int len,
+ enum dma_data_direction direction)
+{
+ struct dma_async_tx_descriptor *desc;
+ struct dma_chan *channel = NULL;
+ dma_cookie_t cookie;
+
+ dev_dbg(ctx->device->dev, "[%s]: ", __func__);
+
+ if (unlikely(!IS_ALIGNED((u32)sg, 4))) {
+ dev_err(ctx->device->dev, "[%s]: Data in sg list isn't "
+ "aligned! Addr: 0x%08x", __func__, (u32)sg);
+ return -EFAULT;
+ }
+
+ switch (direction) {
+ case DMA_TO_DEVICE:
+ channel = ctx->device->dma.chan_mem2cryp;
+ ctx->device->dma.sg_src = sg;
+ ctx->device->dma.sg_src_len = dma_map_sg(channel->device->dev,
+ ctx->device->dma.sg_src,
+ ctx->device->dma.nents_src,
+ direction);
+
+ if (!ctx->device->dma.sg_src_len) {
+ dev_dbg(ctx->device->dev,
+ "[%s]: Could not map the sg list (TO_DEVICE)",
+ __func__);
+ return -EFAULT;
+ }
+
+ dev_dbg(ctx->device->dev, "[%s]: Setting up DMA for buffer "
+ "(TO_DEVICE)", __func__);
+
+ desc = channel->device->device_prep_slave_sg(channel,
+ ctx->device->dma.sg_src,
+ ctx->device->dma.sg_src_len,
+ direction,
+ DMA_CTRL_ACK);
+ break;
+
+ case DMA_FROM_DEVICE:
+ channel = ctx->device->dma.chan_cryp2mem;
+ ctx->device->dma.sg_dst = sg;
+ ctx->device->dma.sg_dst_len = dma_map_sg(channel->device->dev,
+ ctx->device->dma.sg_dst,
+ ctx->device->dma.nents_dst,
+ direction);
+
+ if (!ctx->device->dma.sg_dst_len) {
+ dev_dbg(ctx->device->dev,
+ "[%s]: Could not map the sg list (FROM_DEVICE)",
+ __func__);
+ return -EFAULT;
+ }
+
+ dev_dbg(ctx->device->dev, "[%s]: Setting up DMA for buffer "
+ "(FROM_DEVICE)", __func__);
+
+ desc = channel->device->device_prep_slave_sg(channel,
+ ctx->device->dma.sg_dst,
+ ctx->device->dma.sg_dst_len,
+ direction,
+ DMA_CTRL_ACK |
+ DMA_PREP_INTERRUPT);
+
+ desc->callback = cryp_dma_out_callback;
+ desc->callback_param = ctx;
+ break;
+
+ default:
+ dev_dbg(ctx->device->dev, "[%s]: Invalid DMA direction",
+ __func__);
+ return -EFAULT;
+ }
+
+ cookie = desc->tx_submit(desc);
+ dma_async_issue_pending(channel);
+
+ return 0;
+}
+
+static void cryp_dma_done(struct cryp_ctx *ctx)
+{
+ struct dma_chan *chan;
+
+ dev_dbg(ctx->device->dev, "[%s]: ", __func__);
+
+ chan = ctx->device->dma.chan_mem2cryp;
+ chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
+ dma_unmap_sg(chan->device->dev, ctx->device->dma.sg_src,
+ ctx->device->dma.sg_src_len, DMA_TO_DEVICE);
+
+ chan = ctx->device->dma.chan_cryp2mem;
+ chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
+ dma_unmap_sg(chan->device->dev, ctx->device->dma.sg_dst,
+ ctx->device->dma.sg_dst_len, DMA_FROM_DEVICE);
+}
+
+static int cryp_dma_write(struct cryp_ctx *ctx, struct scatterlist *sg,
+ int len)
+{
+ int error = cryp_set_dma_transfer(ctx, sg, len, DMA_TO_DEVICE);
+ dev_dbg(ctx->device->dev, "[%s]: ", __func__);
+
+ if (error) {
+ dev_dbg(ctx->device->dev, "[%s]: cryp_set_dma_transfer() "
+ "failed", __func__);
+ return error;
+ }
+
+ return len;
+}
+
+static int cryp_dma_read(struct cryp_ctx *ctx, struct scatterlist *sg, int len)
+{
+ int error = cryp_set_dma_transfer(ctx, sg, len, DMA_FROM_DEVICE);
+ if (error) {
+ dev_dbg(ctx->device->dev, "[%s]: cryp_set_dma_transfer() "
+ "failed", __func__);
+ return error;
+ }
+
+ return len;
+}
+
+static void cryp_polling_mode(struct cryp_ctx *ctx,
+ struct cryp_device_data *device_data)
+{
+ int len = ctx->blocksize / BYTES_PER_WORD;
+ int remaining_length = ctx->datalen;
+ u32 *indata = (u32 *)ctx->indata;
+ u32 *outdata = (u32 *)ctx->outdata;
+
+ while (remaining_length > 0) {
+ writesl(&device_data->base->din, indata, len);
+ indata += len;
+ remaining_length -= (len * BYTES_PER_WORD);
+ cryp_wait_until_done(device_data);
+
+ readsl(&device_data->base->dout, outdata, len);
+ outdata += len;
+ cryp_wait_until_done(device_data);
+ }
+}
+
+static int cryp_disable_power(struct device *dev,
+ struct cryp_device_data *device_data,
+ bool save_device_context)
+{
+ int ret = 0;
+
+ dev_dbg(dev, "[%s]", __func__);
+
+ spin_lock(&device_data->power_state_spinlock);
+ if (!device_data->power_state)
+ goto out;
+
+ spin_lock(&device_data->ctx_lock);
+ if (save_device_context && device_data->current_ctx) {
+ cryp_save_device_context(device_data,
+ &device_data->current_ctx->dev_ctx,
+ cryp_mode);
+ device_data->restore_dev_ctx = true;
+ }
+ spin_unlock(&device_data->ctx_lock);
+
+ clk_disable(device_data->clk);
+ ret = regulator_disable(device_data->pwr_regulator);
+ if (ret)
+ dev_err(dev, "[%s]: "
+ "regulator_disable() failed!",
+ __func__);
+
+ device_data->power_state = false;
+
+out:
+ spin_unlock(&device_data->power_state_spinlock);
+
+ return ret;
+}
+
+static int cryp_enable_power(
+ struct device *dev,
+ struct cryp_device_data *device_data,
+ bool restore_device_context)
+{
+ int ret = 0;
+
+ dev_dbg(dev, "[%s]", __func__);
+
+ spin_lock(&device_data->power_state_spinlock);
+ if (!device_data->power_state) {
+ ret = regulator_enable(device_data->pwr_regulator);
+ if (ret) {
+ dev_err(dev, "[%s]: regulator_enable() failed!",
+ __func__);
+ goto out;
+ }
+
+ ret = clk_enable(device_data->clk);
+ if (ret) {
+ dev_err(dev, "[%s]: clk_enable() failed!",
+ __func__);
+ regulator_disable(device_data->pwr_regulator);
+ goto out;
+ }
+ device_data->power_state = true;
+ }
+
+ if (device_data->restore_dev_ctx) {
+ spin_lock(&device_data->ctx_lock);
+ if (restore_device_context && device_data->current_ctx) {
+ device_data->restore_dev_ctx = false;
+ cryp_restore_device_context(device_data,
+ &device_data->current_ctx->dev_ctx);
+ }
+ spin_unlock(&device_data->ctx_lock);
+ }
+out:
+ spin_unlock(&device_data->power_state_spinlock);
+
+ return ret;
+}
+
+static int hw_crypt_noxts(struct cryp_ctx *ctx,
+ struct cryp_device_data *device_data)
+{
+ int ret = 0;
+
+ const u8 *indata = ctx->indata;
+ u8 *outdata = ctx->outdata;
+ u32 datalen = ctx->datalen;
+ u32 outlen = datalen;
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+
+ ctx->outlen = ctx->datalen;
+
+ if (unlikely(!IS_ALIGNED((u32)indata, 4))) {
+ pr_debug(DEV_DBG_NAME " [%s]: Data isn't aligned! Addr: "
+ "0x%08x", __func__, (u32)indata);
+ return -EINVAL;
+ }
+
+ ret = cryp_setup_context(ctx, device_data);
+
+ if (ret)
+ goto out;
+
+ if (cryp_mode == CRYP_MODE_INTERRUPT) {
+ cryp_enable_irq_src(device_data, CRYP_IRQ_SRC_INPUT_FIFO |
+ CRYP_IRQ_SRC_OUTPUT_FIFO);
+
+ /*
+ * ctx->outlen is decremented in the cryp_interrupt_handler
+ * function. We had to add cpu_relax() (barrier) to make sure
+ * that gcc didn't optimze away this variable.
+ */
+ while (ctx->outlen > 0)
+ cpu_relax();
+ } else if (cryp_mode == CRYP_MODE_POLLING ||
+ cryp_mode == CRYP_MODE_DMA) {
+ /*
+ * The reason for having DMA in this if case is that if we are
+ * running cryp_mode = 2, then we separate DMA routines for
+ * handling cipher/plaintext > blocksize, except when
+ * running the normal CRYPTO_ALG_TYPE_CIPHER, then we still use
+ * the polling mode. Overhead of doing DMA setup eats up the
+ * benefits using it.
+ */
+ cryp_polling_mode(ctx, device_data);
+ } else {
+ dev_err(ctx->device->dev, "[%s]: Invalid operation mode!",
+ __func__);
+ ret = -EPERM;
+ goto out;
+ }
+
+ cryp_save_device_context(device_data, &ctx->dev_ctx, cryp_mode);
+ ctx->updated = 1;
+
+out:
+ ctx->indata = indata;
+ ctx->outdata = outdata;
+ ctx->datalen = datalen;
+ ctx->outlen = outlen;
+
+ return ret;
+}
+
+static int get_nents(struct scatterlist *sg, int nbytes)
+{
+ int nents = 0;
+
+ while (nbytes > 0) {
+ nbytes -= sg->length;
+ sg = scatterwalk_sg_next(sg);
+ nents++;
+ }
+
+ return nents;
+}
+
+static int ablk_dma_crypt(struct ablkcipher_request *areq)
+{
+ struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
+ struct cryp_ctx *ctx = crypto_ablkcipher_ctx(cipher);
+ struct cryp_device_data *device_data;
+
+ int bytes_written = 0;
+ int bytes_read = 0;
+ int ret;
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+
+ ctx->datalen = areq->nbytes;
+ ctx->outlen = areq->nbytes;
+
+ ret = cryp_get_device_data(ctx, &device_data);
+ if (ret)
+ return ret;
+
+ ret = cryp_setup_context(ctx, device_data);
+ if (ret)
+ goto out;
+
+ /* We have the device now, so store the nents in the dma struct. */
+ ctx->device->dma.nents_src = get_nents(areq->src, ctx->datalen);
+ ctx->device->dma.nents_dst = get_nents(areq->dst, ctx->outlen);
+
+ /* Enable DMA in- and output. */
+ cryp_configure_for_dma(device_data, CRYP_DMA_ENABLE_BOTH_DIRECTIONS);
+
+ bytes_written = cryp_dma_write(ctx, areq->src, ctx->datalen);
+ bytes_read = cryp_dma_read(ctx, areq->dst, bytes_written);
+
+ wait_for_completion(&ctx->device->dma.cryp_dma_complete);
+ cryp_dma_done(ctx);
+
+ cryp_save_device_context(device_data, &ctx->dev_ctx, cryp_mode);
+ ctx->updated = 1;
+
+out:
+ spin_lock(&device_data->ctx_lock);
+ device_data->current_ctx = NULL;
+ ctx->device = NULL;
+ spin_unlock(&device_data->ctx_lock);
+
+ /*
+ * The down_interruptible part for this semaphore is called in
+ * cryp_get_device_data.
+ */
+ up(&driver_data.device_allocation);
+
+ if (unlikely(bytes_written != bytes_read))
+ return -EPERM;
+
+ return 0;
+}
+
+static int ablk_crypt(struct ablkcipher_request *areq)
+{
+ struct ablkcipher_walk walk;
+ struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
+ struct cryp_ctx *ctx = crypto_ablkcipher_ctx(cipher);
+ struct cryp_device_data *device_data;
+ unsigned long src_paddr;
+ unsigned long dst_paddr;
+ int ret;
+ int nbytes;
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+
+ ret = cryp_get_device_data(ctx, &device_data);
+ if (ret)
+ goto out;
+
+ ablkcipher_walk_init(&walk, areq->dst, areq->src, areq->nbytes);
+ ret = ablkcipher_walk_phys(areq, &walk);
+
+ if (ret) {
+ pr_err(DEV_DBG_NAME "[%s]: ablkcipher_walk_phys() failed!",
+ __func__);
+ goto out;
+ }
+
+ while ((nbytes = walk.nbytes) > 0) {
+ ctx->iv = walk.iv;
+ src_paddr = (page_to_phys(walk.src.page) + walk.src.offset);
+ ctx->indata = phys_to_virt(src_paddr);
+
+ dst_paddr = (page_to_phys(walk.dst.page) + walk.dst.offset);
+ ctx->outdata = phys_to_virt(dst_paddr);
+
+ ctx->datalen = nbytes - (nbytes % ctx->blocksize);
+
+ ret = hw_crypt_noxts(ctx, device_data);
+ if (ret)
+ goto out;
+
+ nbytes -= ctx->datalen;
+ ret = ablkcipher_walk_done(areq, &walk, nbytes);
+ if (ret)
+ goto out;
+ }
+ ablkcipher_walk_complete(&walk);
+
+out:
+ /* Release the device */
+ spin_lock(&device_data->ctx_lock);
+ device_data->current_ctx = NULL;
+ ctx->device = NULL;
+ spin_unlock(&device_data->ctx_lock);
+
+ /*
+ * The down_interruptible part for this semaphore is called in
+ * cryp_get_device_data.
+ */
+ up(&driver_data.device_allocation);
+
+ return ret;
+}
+
+static int aes_ablkcipher_setkey(struct crypto_ablkcipher *cipher,
+ const u8 *key, unsigned int keylen)
+{
+ struct cryp_ctx *ctx = crypto_ablkcipher_ctx(cipher);
+ u32 *flags = &cipher->base.crt_flags;
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+
+ switch (keylen) {
+ case AES_KEYSIZE_128:
+ ctx->config.keysize = CRYP_KEY_SIZE_128;
+ break;
+
+ case AES_KEYSIZE_192:
+ ctx->config.keysize = CRYP_KEY_SIZE_192;
+ break;
+
+ case AES_KEYSIZE_256:
+ ctx->config.keysize = CRYP_KEY_SIZE_256;
+ break;
+
+ default:
+ pr_err(DEV_DBG_NAME "[%s]: Unknown keylen!", __func__);
+ *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ return -EINVAL;
+ }
+
+ memcpy(ctx->key, key, keylen);
+ ctx->keylen = keylen;
+
+ ctx->updated = 0;
+
+ return 0;
+}
+
+static int des_ablkcipher_setkey(struct crypto_ablkcipher *cipher,
+ const u8 *key, unsigned int keylen)
+{
+ struct cryp_ctx *ctx = crypto_ablkcipher_ctx(cipher);
+ u32 *flags = &cipher->base.crt_flags;
+ u32 tmp[DES_EXPKEY_WORDS];
+ int ret;
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+ if (keylen != DES_KEY_SIZE) {
+ *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ pr_debug(DEV_DBG_NAME " [%s]: CRYPTO_TFM_RES_BAD_KEY_LEN",
+ __func__);
+ return -EINVAL;
+ }
+
+ ret = des_ekey(tmp, key);
+ if (unlikely(ret == 0) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ *flags |= CRYPTO_TFM_RES_WEAK_KEY;
+ pr_debug(DEV_DBG_NAME " [%s]: CRYPTO_TFM_REQ_WEAK_KEY",
+ __func__);
+ return -EINVAL;
+ }
+
+ memcpy(ctx->key, key, keylen);
+ ctx->keylen = keylen;
+
+ ctx->updated = 0;
+ return 0;
+}
+
+static int des3_ablkcipher_setkey(struct crypto_ablkcipher *cipher,
+ const u8 *key, unsigned int keylen)
+{
+ struct cryp_ctx *ctx = crypto_ablkcipher_ctx(cipher);
+ u32 *flags = &cipher->base.crt_flags;
+ const u32 *K = (const u32 *)key;
+ u32 tmp[DES3_EDE_EXPKEY_WORDS];
+ int i, ret;
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+ if (keylen != DES3_EDE_KEY_SIZE) {
+ *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ pr_debug(DEV_DBG_NAME " [%s]: CRYPTO_TFM_RES_BAD_KEY_LEN",
+ __func__);
+ return -EINVAL;
+ }
+
+ /* Checking key interdependency for weak key detection. */
+ if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
+ !((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&
+ (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ *flags |= CRYPTO_TFM_RES_WEAK_KEY;
+ pr_debug(DEV_DBG_NAME " [%s]: CRYPTO_TFM_REQ_WEAK_KEY",
+ __func__);
+ return -EINVAL;
+ }
+ for (i = 0; i < 3; i++) {
+ ret = des_ekey(tmp, key + i*DES_KEY_SIZE);
+ if (unlikely(ret == 0) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ *flags |= CRYPTO_TFM_RES_WEAK_KEY;
+ pr_debug(DEV_DBG_NAME " [%s]: "
+ "CRYPTO_TFM_REQ_WEAK_KEY", __func__);
+ return -EINVAL;
+ }
+ }
+
+ memcpy(ctx->key, key, keylen);
+ ctx->keylen = keylen;
+
+ ctx->updated = 0;
+ return 0;
+}
+
+static int cryp_blk_encrypt(struct ablkcipher_request *areq)
+{
+ struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
+ struct cryp_ctx *ctx = crypto_ablkcipher_ctx(cipher);
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+
+ ctx->config.algodir = CRYP_ALGORITHM_ENCRYPT;
+
+ /*
+ * DMA does not work for DES due to a hw bug */
+ if (cryp_mode == CRYP_MODE_DMA && mode_is_aes(ctx->config.algomode))
+ return ablk_dma_crypt(areq);
+
+ /* For everything except DMA, we run the non DMA version. */
+ return ablk_crypt(areq);
+}
+
+static int cryp_blk_decrypt(struct ablkcipher_request *areq)
+{
+ struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
+ struct cryp_ctx *ctx = crypto_ablkcipher_ctx(cipher);
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+
+ ctx->config.algodir = CRYP_ALGORITHM_DECRYPT;
+
+ /* DMA does not work for DES due to a hw bug */
+ if (cryp_mode == CRYP_MODE_DMA && mode_is_aes(ctx->config.algomode))
+ return ablk_dma_crypt(areq);
+
+ /* For everything except DMA, we run the non DMA version. */
+ return ablk_crypt(areq);
+}
+
+struct cryp_algo_template {
+ enum cryp_algo_mode algomode;
+ struct crypto_alg crypto;
+};
+
+static int cryp_cra_init(struct crypto_tfm *tfm)
+{
+ struct cryp_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct cryp_algo_template *cryp_alg = container_of(alg,
+ struct cryp_algo_template,
+ crypto);
+
+ ctx->config.algomode = cryp_alg->algomode;
+ ctx->blocksize = crypto_tfm_alg_blocksize(tfm);
+
+ return 0;
+}
+
+static struct cryp_algo_template cryp_algs[] = {
+ {
+ .algomode = CRYP_ALGO_AES_ECB,
+ .crypto = {
+ .cra_name = "aes",
+ .cra_driver_name = "aes-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = aes_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt
+ }
+ }
+ }
+ },
+ {
+ .algomode = CRYP_ALGO_AES_ECB,
+ .crypto = {
+ .cra_name = "ecb(aes)",
+ .cra_driver_name = "ecb-aes-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = aes_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt,
+ }
+ }
+ }
+ },
+ {
+ .algomode = CRYP_ALGO_AES_CBC,
+ .crypto = {
+ .cra_name = "cbc(aes)",
+ .cra_driver_name = "cbc-aes-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = aes_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt,
+ .ivsize = AES_BLOCK_SIZE,
+ }
+ }
+ }
+ },
+ {
+ .algomode = CRYP_ALGO_AES_CTR,
+ .crypto = {
+ .cra_name = "ctr(aes)",
+ .cra_driver_name = "ctr-aes-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = aes_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt,
+ .ivsize = AES_BLOCK_SIZE,
+ }
+ }
+ }
+ },
+ {
+ .algomode = CRYP_ALGO_DES_ECB,
+ .crypto = {
+ .cra_name = "des",
+ .cra_driver_name = "des-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .setkey = des_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt
+ }
+ }
+ }
+
+ },
+ {
+ .algomode = CRYP_ALGO_TDES_ECB,
+ .crypto = {
+ .cra_name = "des3_ede",
+ .cra_driver_name = "des3_ede-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = DES3_EDE_KEY_SIZE,
+ .max_keysize = DES3_EDE_KEY_SIZE,
+ .setkey = des_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt
+ }
+ }
+ }
+ },
+ {
+ .algomode = CRYP_ALGO_DES_ECB,
+ .crypto = {
+ .cra_name = "ecb(des)",
+ .cra_driver_name = "ecb-des-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .setkey = des_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt,
+ }
+ }
+ }
+ },
+ {
+ .algomode = CRYP_ALGO_TDES_ECB,
+ .crypto = {
+ .cra_name = "ecb(des3_ede)",
+ .cra_driver_name = "ecb-des3_ede-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = DES3_EDE_KEY_SIZE,
+ .max_keysize = DES3_EDE_KEY_SIZE,
+ .setkey = des3_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt,
+ }
+ }
+ }
+ },
+ {
+ .algomode = CRYP_ALGO_DES_CBC,
+ .crypto = {
+ .cra_name = "cbc(des)",
+ .cra_driver_name = "cbc-des-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .setkey = des_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt,
+ }
+ }
+ }
+ },
+ {
+ .algomode = CRYP_ALGO_TDES_CBC,
+ .crypto = {
+ .cra_name = "cbc(des3_ede)",
+ .cra_driver_name = "cbc-des3_ede-ux500",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct cryp_ctx),
+ .cra_alignmask = 3,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = cryp_cra_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = DES3_EDE_KEY_SIZE,
+ .max_keysize = DES3_EDE_KEY_SIZE,
+ .setkey = des3_ablkcipher_setkey,
+ .encrypt = cryp_blk_encrypt,
+ .decrypt = cryp_blk_decrypt,
+ .ivsize = DES3_EDE_BLOCK_SIZE,
+ }
+ }
+ }
+ }
+};
+
+/**
+ * cryp_algs_register_all -
+ */
+static int cryp_algs_register_all(void)
+{
+ int ret;
+ int i;
+ int count;
+
+ pr_debug("[%s]", __func__);
+
+ for (i = 0; i < ARRAY_SIZE(cryp_algs); i++) {
+ ret = crypto_register_alg(&cryp_algs[i].crypto);
+ if (ret) {
+ count = i;
+ pr_err("[%s] alg registration failed",
+ cryp_algs[i].crypto.cra_driver_name);
+ goto unreg;
+ }
+ }
+ return 0;
+unreg:
+ for (i = 0; i < count; i++)
+ crypto_unregister_alg(&cryp_algs[i].crypto);
+ return ret;
+}
+
+/**
+ * cryp_algs_unregister_all -
+ */
+static void cryp_algs_unregister_all(void)
+{
+ int i;
+
+ pr_debug(DEV_DBG_NAME " [%s]", __func__);
+
+ for (i = 0; i < ARRAY_SIZE(cryp_algs); i++)
+ crypto_unregister_alg(&cryp_algs[i].crypto);
+}
+
+static int ux500_cryp_probe(struct platform_device *pdev)
+{
+ int ret;
+ int cryp_error = 0;
+ struct resource *res = NULL;
+ struct resource *res_irq = NULL;
+ struct cryp_device_data *device_data;
+ struct cryp_protection_config prot = {
+ .privilege_access = CRYP_STATE_ENABLE
+ };
+ struct device *dev = &pdev->dev;
+
+ dev_dbg(dev, "[%s]", __func__);
+ device_data = kzalloc(sizeof(struct cryp_device_data), GFP_ATOMIC);
+ if (!device_data) {
+ dev_err(dev, "[%s]: kzalloc() failed!", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ device_data->dev = dev;
+ device_data->current_ctx = NULL;
+
+ /* Grab the DMA configuration from platform data. */
+ mem_to_engine = &((struct cryp_platform_data *)
+ dev->platform_data)->mem_to_engine;
+ engine_to_mem = &((struct cryp_platform_data *)
+ dev->platform_data)->engine_to_mem;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "[%s]: platform_get_resource() failed",
+ __func__);
+ ret = -ENODEV;
+ goto out_kfree;
+ }
+
+ res = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (res == NULL) {
+ dev_err(dev, "[%s]: request_mem_region() failed",
+ __func__);
+ ret = -EBUSY;
+ goto out_kfree;
+ }
+
+ device_data->base = ioremap(res->start, resource_size(res));
+ if (!device_data->base) {
+ dev_err(dev, "[%s]: ioremap failed!", __func__);
+ ret = -ENOMEM;
+ goto out_free_mem;
+ }
+
+ spin_lock_init(&device_data->ctx_lock);
+ spin_lock_init(&device_data->power_state_spinlock);
+
+ /* Enable power for CRYP hardware block */
+ device_data->pwr_regulator = regulator_get(&pdev->dev, "v-ape");
+ if (IS_ERR(device_data->pwr_regulator)) {
+ dev_err(dev, "[%s]: could not get cryp regulator", __func__);
+ ret = PTR_ERR(device_data->pwr_regulator);
+ device_data->pwr_regulator = NULL;
+ goto out_unmap;
+ }
+
+ /* Enable the clk for CRYP hardware block */
+ device_data->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(device_data->clk)) {
+ dev_err(dev, "[%s]: clk_get() failed!", __func__);
+ ret = PTR_ERR(device_data->clk);
+ goto out_regulator;
+ }
+
+ /* Enable device power (and clock) */
+ ret = cryp_enable_power(device_data->dev, device_data, false);
+ if (ret) {
+ dev_err(dev, "[%s]: cryp_enable_power() failed!", __func__);
+ goto out_clk;
+ }
+
+ cryp_error = cryp_check(device_data);
+ if (cryp_error != 0) {
+ dev_err(dev, "[%s]: cryp_init() failed!", __func__);
+ ret = -EINVAL;
+ goto out_power;
+ }
+
+ cryp_error = cryp_configure_protection(device_data, &prot);
+ if (cryp_error != 0) {
+ dev_err(dev, "[%s]: cryp_configure_protection() failed!",
+ __func__);
+ ret = -EINVAL;
+ goto out_power;
+ }
+
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res_irq) {
+ dev_err(dev, "[%s]: IORESOURCE_IRQ unavailable",
+ __func__);
+ goto out_power;
+ }
+
+ ret = request_irq(res_irq->start,
+ cryp_interrupt_handler,
+ 0,
+ "cryp1",
+ device_data);
+ if (ret) {
+ dev_err(dev, "[%s]: Unable to request IRQ", __func__);
+ goto out_power;
+ }
+
+ if (cryp_mode == CRYP_MODE_DMA)
+ cryp_dma_setup_channel(device_data, dev);
+
+ platform_set_drvdata(pdev, device_data);
+
+ /* Put the new device into the device list... */
+ klist_add_tail(&device_data->list_node, &driver_data.device_list);
+
+ /* ... and signal that a new device is available. */
+ up(&driver_data.device_allocation);
+
+ atomic_set(&session_id, 1);
+
+ ret = cryp_algs_register_all();
+ if (ret) {
+ dev_err(dev, "[%s]: cryp_algs_register_all() failed!",
+ __func__);
+ goto out_power;
+ }
+
+ return 0;
+
+out_power:
+ cryp_disable_power(device_data->dev, device_data, false);
+
+out_clk:
+ clk_put(device_data->clk);
+
+out_regulator:
+ regulator_put(device_data->pwr_regulator);
+
+out_unmap:
+ iounmap(device_data->base);
+
+out_free_mem:
+ release_mem_region(res->start, resource_size(res));
+
+out_kfree:
+ kfree(device_data);
+out:
+ return ret;
+}
+
+static int ux500_cryp_remove(struct platform_device *pdev)
+{
+ struct resource *res = NULL;
+ struct resource *res_irq = NULL;
+ struct cryp_device_data *device_data;
+
+ dev_dbg(&pdev->dev, "[%s]", __func__);
+ device_data = platform_get_drvdata(pdev);
+ if (!device_data) {
+ dev_err(&pdev->dev, "[%s]: platform_get_drvdata() failed!",
+ __func__);
+ return -ENOMEM;
+ }
+
+ /* Try to decrease the number of available devices. */
+ if (down_trylock(&driver_data.device_allocation))
+ return -EBUSY;
+
+ /* Check that the device is free */
+ spin_lock(&device_data->ctx_lock);
+ /* current_ctx allocates a device, NULL = unallocated */
+ if (device_data->current_ctx) {
+ /* The device is busy */
+ spin_unlock(&device_data->ctx_lock);
+ /* Return the device to the pool. */
+ up(&driver_data.device_allocation);
+ return -EBUSY;
+ }
+
+ spin_unlock(&device_data->ctx_lock);
+
+ /* Remove the device from the list */
+ if (klist_node_attached(&device_data->list_node))
+ klist_remove(&device_data->list_node);
+
+ /* If this was the last device, remove the services */
+ if (list_empty(&driver_data.device_list.k_list))
+ cryp_algs_unregister_all();
+
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res_irq)
+ dev_err(&pdev->dev, "[%s]: IORESOURCE_IRQ, unavailable",
+ __func__);
+ else {
+ disable_irq(res_irq->start);
+ free_irq(res_irq->start, device_data);
+ }
+
+ if (cryp_disable_power(&pdev->dev, device_data, false))
+ dev_err(&pdev->dev, "[%s]: cryp_disable_power() failed",
+ __func__);
+
+ clk_put(device_data->clk);
+ regulator_put(device_data->pwr_regulator);
+
+ iounmap(device_data->base);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res)
+ release_mem_region(res->start, res->end - res->start + 1);
+
+ kfree(device_data);
+
+ return 0;
+}
+
+static void ux500_cryp_shutdown(struct platform_device *pdev)
+{
+ struct resource *res_irq = NULL;
+ struct cryp_device_data *device_data;
+
+ dev_dbg(&pdev->dev, "[%s]", __func__);
+
+ device_data = platform_get_drvdata(pdev);
+ if (!device_data) {
+ dev_err(&pdev->dev, "[%s]: platform_get_drvdata() failed!",
+ __func__);
+ return;
+ }
+
+ /* Check that the device is free */
+ spin_lock(&device_data->ctx_lock);
+ /* current_ctx allocates a device, NULL = unallocated */
+ if (!device_data->current_ctx) {
+ if (down_trylock(&driver_data.device_allocation))
+ dev_dbg(&pdev->dev, "[%s]: Cryp still in use!"
+ "Shutting down anyway...", __func__);
+ /**
+ * (Allocate the device)
+ * Need to set this to non-null (dummy) value,
+ * to avoid usage if context switching.
+ */
+ device_data->current_ctx++;
+ }
+ spin_unlock(&device_data->ctx_lock);
+
+ /* Remove the device from the list */
+ if (klist_node_attached(&device_data->list_node))
+ klist_remove(&device_data->list_node);
+
+ /* If this was the last device, remove the services */
+ if (list_empty(&driver_data.device_list.k_list))
+ cryp_algs_unregister_all();
+
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res_irq)
+ dev_err(&pdev->dev, "[%s]: IORESOURCE_IRQ, unavailable",
+ __func__);
+ else {
+ disable_irq(res_irq->start);
+ free_irq(res_irq->start, device_data);
+ }
+
+ if (cryp_disable_power(&pdev->dev, device_data, false))
+ dev_err(&pdev->dev, "[%s]: cryp_disable_power() failed",
+ __func__);
+
+}
+
+static int ux500_cryp_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ int ret;
+ struct cryp_device_data *device_data;
+ struct resource *res_irq;
+ struct cryp_ctx *temp_ctx = NULL;
+
+ dev_dbg(&pdev->dev, "[%s]", __func__);
+
+ /* Handle state? */
+ device_data = platform_get_drvdata(pdev);
+ if (!device_data) {
+ dev_err(&pdev->dev, "[%s]: platform_get_drvdata() failed!",
+ __func__);
+ return -ENOMEM;
+ }
+
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res_irq)
+ dev_err(&pdev->dev, "[%s]: IORESOURCE_IRQ, unavailable",
+ __func__);
+ else
+ disable_irq(res_irq->start);
+
+ spin_lock(&device_data->ctx_lock);
+ if (!device_data->current_ctx)
+ device_data->current_ctx++;
+ spin_unlock(&device_data->ctx_lock);
+
+ if (device_data->current_ctx == ++temp_ctx) {
+ if (down_interruptible(&driver_data.device_allocation))
+ dev_dbg(&pdev->dev, "[%s]: down_interruptible() "
+ "failed", __func__);
+ ret = cryp_disable_power(&pdev->dev, device_data, false);
+
+ } else
+ ret = cryp_disable_power(&pdev->dev, device_data, true);
+
+ if (ret)
+ dev_err(&pdev->dev, "[%s]: cryp_disable_power()", __func__);
+
+ return ret;
+}
+
+static int ux500_cryp_resume(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct cryp_device_data *device_data;
+ struct resource *res_irq;
+ struct cryp_ctx *temp_ctx = NULL;
+
+ dev_dbg(&pdev->dev, "[%s]", __func__);
+
+ device_data = platform_get_drvdata(pdev);
+ if (!device_data) {
+ dev_err(&pdev->dev, "[%s]: platform_get_drvdata() failed!",
+ __func__);
+ return -ENOMEM;
+ }
+
+ spin_lock(&device_data->ctx_lock);
+ if (device_data->current_ctx == ++temp_ctx)
+ device_data->current_ctx = NULL;
+ spin_unlock(&device_data->ctx_lock);
+
+
+ if (!device_data->current_ctx)
+ up(&driver_data.device_allocation);
+ else
+ ret = cryp_enable_power(&pdev->dev, device_data, true);
+
+ if (ret)
+ dev_err(&pdev->dev, "[%s]: cryp_enable_power() failed!",
+ __func__);
+ else {
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (res_irq)
+ enable_irq(res_irq->start);
+ }
+
+ return ret;
+}
+
+static struct platform_driver cryp_driver = {
+ .probe = ux500_cryp_probe,
+ .remove = ux500_cryp_remove,
+ .shutdown = ux500_cryp_shutdown,
+ .suspend = ux500_cryp_suspend,
+ .resume = ux500_cryp_resume,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "cryp1"
+ }
+};
+
+static int __init ux500_cryp_mod_init(void)
+{
+ pr_debug("[%s] is called!", __func__);
+ klist_init(&driver_data.device_list, NULL, NULL);
+ /* Initialize the semaphore to 0 devices (locked state) */
+ sema_init(&driver_data.device_allocation, 0);
+ return platform_driver_register(&cryp_driver);
+}
+
+static void __exit ux500_cryp_mod_fini(void)
+{
+ pr_debug("[%s] is called!", __func__);
+ platform_driver_unregister(&cryp_driver);
+ return;
+}
+
+module_init(ux500_cryp_mod_init);
+module_exit(ux500_cryp_mod_fini);
+
+module_param(cryp_mode, int, 0);
+
+MODULE_DESCRIPTION("Driver for ST-Ericsson UX500 CRYP crypto engine.");
+MODULE_ALIAS("aes-all");
+MODULE_ALIAS("des-all");
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/crypto/ux500/cryp/cryp_irq.c b/drivers/crypto/ux500/cryp/cryp_irq.c
new file mode 100644
index 0000000..08d291c
--- /dev/null
+++ b/drivers/crypto/ux500/cryp/cryp_irq.c
@@ -0,0 +1,45 @@
+/**
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen <[email protected]> for ST-Ericsson.
+ * Author: Jonas Linde <[email protected]> for ST-Ericsson.
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson.
+ * Author: Berne Hebark <[email protected]> for ST-Ericsson.
+ * Author: Niklas Hernaeus <[email protected]> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL) version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/bitmap.h>
+#include <linux/device.h>
+
+#include "cryp.h"
+#include "cryp_p.h"
+#include "cryp_irq.h"
+#include "cryp_irqp.h"
+
+void cryp_enable_irq_src(struct cryp_device_data *device_data, u32 irq_src)
+{
+ u32 i;
+
+ dev_dbg(device_data->dev, "[%s]", __func__);
+
+ i = readl_relaxed(&device_data->base->imsc);
+ i = i | irq_src;
+ writel_relaxed(i, &device_data->base->imsc);
+}
+
+void cryp_disable_irq_src(struct cryp_device_data *device_data, u32 irq_src)
+{
+ u32 i;
+
+ dev_dbg(device_data->dev, "[%s]", __func__);
+
+ i = readl_relaxed(&device_data->base->imsc);
+ i = i & ~irq_src;
+ writel_relaxed(i, &device_data->base->imsc);
+}
+
+bool cryp_pending_irq_src(struct cryp_device_data *device_data, u32 irq_src)
+{
+ return (readl_relaxed(&device_data->base->mis) & irq_src) > 0;
+}
diff --git a/drivers/crypto/ux500/cryp/cryp_irq.h b/drivers/crypto/ux500/cryp/cryp_irq.h
new file mode 100644
index 0000000..5a7837f
--- /dev/null
+++ b/drivers/crypto/ux500/cryp/cryp_irq.h
@@ -0,0 +1,31 @@
+/**
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen <[email protected]> for ST-Ericsson.
+ * Author: Jonas Linde <[email protected]> for ST-Ericsson.
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson.
+ * Author: Berne Hebark <[email protected]> for ST-Ericsson.
+ * Author: Niklas Hernaeus <[email protected]> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef _CRYP_IRQ_H_
+#define _CRYP_IRQ_H_
+
+#include "cryp.h"
+
+enum cryp_irq_src_id {
+ CRYP_IRQ_SRC_INPUT_FIFO = 0x1,
+ CRYP_IRQ_SRC_OUTPUT_FIFO = 0x2,
+ CRYP_IRQ_SRC_ALL = 0x3
+};
+
+/**
+ * M0 Funtions
+ */
+void cryp_enable_irq_src(struct cryp_device_data *device_data, u32 irq_src);
+
+void cryp_disable_irq_src(struct cryp_device_data *device_data, u32 irq_src);
+
+bool cryp_pending_irq_src(struct cryp_device_data *device_data, u32 irq_src);
+
+#endif /* _CRYP_IRQ_H_ */
diff --git a/drivers/crypto/ux500/cryp/cryp_irqp.h b/drivers/crypto/ux500/cryp/cryp_irqp.h
new file mode 100644
index 0000000..8b339cc
--- /dev/null
+++ b/drivers/crypto/ux500/cryp/cryp_irqp.h
@@ -0,0 +1,125 @@
+/**
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen <[email protected]> for ST-Ericsson.
+ * Author: Jonas Linde <[email protected]> for ST-Ericsson.
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson.
+ * Author: Berne Hebark <[email protected]> for ST-Ericsson.
+ * Author: Niklas Hernaeus <[email protected]> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef __CRYP_IRQP_H_
+#define __CRYP_IRQP_H_
+
+#include "cryp_irq.h"
+
+/**
+ *
+ * CRYP Registers - Offset mapping
+ * +-----------------+
+ * 00h | CRYP_CR | Configuration register
+ * +-----------------+
+ * 04h | CRYP_SR | Status register
+ * +-----------------+
+ * 08h | CRYP_DIN | Data In register
+ * +-----------------+
+ * 0ch | CRYP_DOUT | Data out register
+ * +-----------------+
+ * 10h | CRYP_DMACR | DMA control register
+ * +-----------------+
+ * 14h | CRYP_IMSC | IMSC
+ * +-----------------+
+ * 18h | CRYP_RIS | Raw interrupt status
+ * +-----------------+
+ * 1ch | CRYP_MIS | Masked interrupt status.
+ * +-----------------+
+ * Key registers
+ * IVR registers
+ * Peripheral
+ * Cell IDs
+ *
+ * Refer data structure for other register map
+ */
+
+/**
+ * struct cryp_register
+ * @cr - Configuration register
+ * @status - Status register
+ * @din - Data input register
+ * @din_size - Data input size register
+ * @dout - Data output register
+ * @dout_size - Data output size register
+ * @dmacr - Dma control register
+ * @imsc - Interrupt mask set/clear register
+ * @ris - Raw interrupt status
+ * @mis - Masked interrupt statu register
+ * @key_1_l - Key register 1 L
+ * @key_1_r - Key register 1 R
+ * @key_2_l - Key register 2 L
+ * @key_2_r - Key register 2 R
+ * @key_3_l - Key register 3 L
+ * @key_3_r - Key register 3 R
+ * @key_4_l - Key register 4 L
+ * @key_4_r - Key register 4 R
+ * @init_vect_0_l - init vector 0 L
+ * @init_vect_0_r - init vector 0 R
+ * @init_vect_1_l - init vector 1 L
+ * @init_vect_1_r - init vector 1 R
+ * @cryp_unused1 - unused registers
+ * @itcr - Integration test control register
+ * @itip - Integration test input register
+ * @itop - Integration test output register
+ * @cryp_unused2 - unused registers
+ * @periphId0 - FE0 CRYP Peripheral Identication Register
+ * @periphId1 - FE4
+ * @periphId2 - FE8
+ * @periphId3 - FEC
+ * @pcellId0 - FF0 CRYP PCell Identication Register
+ * @pcellId1 - FF4
+ * @pcellId2 - FF8
+ * @pcellId3 - FFC
+ */
+struct cryp_register {
+ u32 cr; /* Configuration register */
+ u32 sr; /* Status register */
+ u32 din; /* Data input register */
+ u32 din_size; /* Data input size register */
+ u32 dout; /* Data output register */
+ u32 dout_size; /* Data output size register */
+ u32 dmacr; /* Dma control register */
+ u32 imsc; /* Interrupt mask set/clear register */
+ u32 ris; /* Raw interrupt status */
+ u32 mis; /* Masked interrupt statu register */
+
+ u32 key_1_l; /*Key register 1 L */
+ u32 key_1_r; /*Key register 1 R */
+ u32 key_2_l; /*Key register 2 L */
+ u32 key_2_r; /*Key register 2 R */
+ u32 key_3_l; /*Key register 3 L */
+ u32 key_3_r; /*Key register 3 R */
+ u32 key_4_l; /*Key register 4 L */
+ u32 key_4_r; /*Key register 4 R */
+
+ u32 init_vect_0_l; /*init vector 0 L */
+ u32 init_vect_0_r; /*init vector 0 R */
+ u32 init_vect_1_l; /*init vector 1 L */
+ u32 init_vect_1_r; /*init vector 1 R */
+
+ u32 cryp_unused1[(0x80 - 0x58) / sizeof(u32)]; /* unused registers */
+ u32 itcr; /*Integration test control register */
+ u32 itip; /*Integration test input register */
+ u32 itop; /*Integration test output register */
+ u32 cryp_unused2[(0xFE0 - 0x8C) / sizeof(u32)]; /* unused registers */
+
+ u32 periphId0; /* FE0 CRYP Peripheral Identication Register */
+ u32 periphId1; /* FE4 */
+ u32 periphId2; /* FE8 */
+ u32 periphId3; /* FEC */
+
+ u32 pcellId0; /* FF0 CRYP PCell Identication Register */
+ u32 pcellId1; /* FF4 */
+ u32 pcellId2; /* FF8 */
+ u32 pcellId3; /* FFC */
+};
+
+#endif
diff --git a/drivers/crypto/ux500/cryp/cryp_p.h b/drivers/crypto/ux500/cryp/cryp_p.h
new file mode 100644
index 0000000..0e07082
--- /dev/null
+++ b/drivers/crypto/ux500/cryp/cryp_p.h
@@ -0,0 +1,124 @@
+/**
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen <[email protected]> for ST-Ericsson.
+ * Author: Jonas Linde <[email protected]> for ST-Ericsson.
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson.
+ * Author: Berne Hebark <[email protected]> for ST-Ericsson.
+ * Author: Niklas Hernaeus <[email protected]> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef _CRYP_P_H_
+#define _CRYP_P_H_
+
+#include <linux/io.h>
+#include <linux/bitops.h>
+
+#include "cryp.h"
+#include "cryp_irqp.h"
+
+/**
+ * Generic Macros
+ */
+#define CRYP_SET_BITS(reg_name, mask) \
+ writel_relaxed((readl_relaxed(reg_name) | mask), reg_name)
+
+#define CRYP_WRITE_BIT(reg_name, val, mask) \
+ writel_relaxed(((readl_relaxed(reg_name) & ~(mask)) |\
+ ((val) & (mask))), reg_name)
+
+#define CRYP_TEST_BITS(reg_name, val) \
+ (readl_relaxed(reg_name) & (val))
+
+#define CRYP_PUT_BITS(reg, val, shift, mask) \
+ writel_relaxed(((readl_relaxed(reg) & ~(mask)) | \
+ (((u32)val << shift) & (mask))), reg)
+
+/**
+ * CRYP specific Macros
+ */
+#define CRYP_PERIPHERAL_ID0 0xE3
+#define CRYP_PERIPHERAL_ID1 0x05
+
+#define CRYP_PERIPHERAL_ID2_DB8500 0x28
+#define CRYP_PERIPHERAL_ID2_DB5500 0x29
+#define CRYP_PERIPHERAL_ID3 0x00
+
+#define CRYP_PCELL_ID0 0x0D
+#define CRYP_PCELL_ID1 0xF0
+#define CRYP_PCELL_ID2 0x05
+#define CRYP_PCELL_ID3 0xB1
+
+/**
+ * CRYP register default values
+ */
+#define MAX_DEVICE_SUPPORT 2
+
+/* Priv set, keyrden set and datatype 8bits swapped set as default. */
+#define CRYP_CR_DEFAULT 0x0482
+#define CRYP_DMACR_DEFAULT 0x0
+#define CRYP_IMSC_DEFAULT 0x0
+#define CRYP_DIN_DEFAULT 0x0
+#define CRYP_DOUT_DEFAULT 0x0
+#define CRYP_KEY_DEFAULT 0x0
+#define CRYP_INIT_VECT_DEFAULT 0x0
+
+/**
+ * CRYP Control register specific mask
+ */
+#define CRYP_CR_SECURE_MASK BIT(0)
+#define CRYP_CR_PRLG_MASK BIT(1)
+#define CRYP_CR_ALGODIR_MASK BIT(2)
+#define CRYP_CR_ALGOMODE_MASK (BIT(5) | BIT(4) | BIT(3))
+#define CRYP_CR_DATATYPE_MASK (BIT(7) | BIT(6))
+#define CRYP_CR_KEYSIZE_MASK (BIT(9) | BIT(8))
+#define CRYP_CR_KEYRDEN_MASK BIT(10)
+#define CRYP_CR_KSE_MASK BIT(11)
+#define CRYP_CR_START_MASK BIT(12)
+#define CRYP_CR_INIT_MASK BIT(13)
+#define CRYP_CR_FFLUSH_MASK BIT(14)
+#define CRYP_CR_CRYPEN_MASK BIT(15)
+#define CRYP_CR_CONTEXT_SAVE_MASK (CRYP_CR_SECURE_MASK |\
+ CRYP_CR_PRLG_MASK |\
+ CRYP_CR_ALGODIR_MASK |\
+ CRYP_CR_ALGOMODE_MASK |\
+ CRYP_CR_DATATYPE_MASK |\
+ CRYP_CR_KEYSIZE_MASK |\
+ CRYP_CR_KEYRDEN_MASK |\
+ CRYP_CR_DATATYPE_MASK)
+
+
+#define CRYP_SR_INFIFO_READY_MASK (BIT(0) | BIT(1))
+#define CRYP_SR_IFEM_MASK BIT(0)
+#define CRYP_SR_BUSY_MASK BIT(4)
+
+/**
+ * Bit position used while setting bits in register
+ */
+#define CRYP_CR_PRLG_POS 1
+#define CRYP_CR_ALGODIR_POS 2
+#define CRYP_CR_ALGOMODE_POS 3
+#define CRYP_CR_DATATYPE_POS 6
+#define CRYP_CR_KEYSIZE_POS 8
+#define CRYP_CR_KEYRDEN_POS 10
+#define CRYP_CR_KSE_POS 11
+#define CRYP_CR_START_POS 12
+#define CRYP_CR_INIT_POS 13
+#define CRYP_CR_CRYPEN_POS 15
+
+#define CRYP_SR_BUSY_POS 4
+
+/**
+ * CRYP PCRs------PC_NAND control register
+ * BIT_MASK
+ */
+#define CRYP_DMA_REQ_MASK (BIT(1) | BIT(0))
+#define CRYP_DMA_REQ_MASK_POS 0
+
+
+struct cryp_system_context {
+ /* CRYP Register structure */
+ struct cryp_register *p_cryp_reg[MAX_DEVICE_SUPPORT];
+};
+
+#endif
--
1.7.10

2012-04-23 08:49:29

by Andreas Westin

[permalink] [raw]
Subject: [PATCH v6 2/3] crypto: ux500: Add driver for HASH hardware

This adds a driver for the ST-Ericsson ux500 hash hardware
module. The driver implements support for SHA-1 and SHA-2.

Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Andreas Westin <[email protected]>
---
arch/arm/mach-ux500/include/mach/crypto-ux500.h | 5 +
drivers/crypto/ux500/Kconfig | 9 +
drivers/crypto/ux500/Makefile | 1 +
drivers/crypto/ux500/hash/Makefile | 11 +
drivers/crypto/ux500/hash/hash_alg.h | 395 +++++
drivers/crypto/ux500/hash/hash_core.c | 2019 +++++++++++++++++++++++
6 files changed, 2440 insertions(+)
create mode 100644 drivers/crypto/ux500/hash/Makefile
create mode 100644 drivers/crypto/ux500/hash/hash_alg.h
create mode 100644 drivers/crypto/ux500/hash/hash_core.c

diff --git a/arch/arm/mach-ux500/include/mach/crypto-ux500.h b/arch/arm/mach-ux500/include/mach/crypto-ux500.h
index c470567..de40add 100644
--- a/arch/arm/mach-ux500/include/mach/crypto-ux500.h
+++ b/arch/arm/mach-ux500/include/mach/crypto-ux500.h
@@ -8,6 +8,11 @@
#include <linux/dmaengine.h>
#include <plat/ste_dma40.h>

+struct hash_platform_data {
+ void *mem_to_engine;
+ bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
+};
+
struct cryp_platform_data {
struct stedma40_chan_cfg mem_to_engine;
struct stedma40_chan_cfg engine_to_mem;
diff --git a/drivers/crypto/ux500/Kconfig b/drivers/crypto/ux500/Kconfig
index b893fa0..b35e5c4 100644
--- a/drivers/crypto/ux500/Kconfig
+++ b/drivers/crypto/ux500/Kconfig
@@ -12,6 +12,15 @@ config CRYPTO_DEV_UX500_CRYP
This selects the crypto driver for the UX500_CRYP hardware. It supports
AES-ECB, CBC and CTR with keys sizes of 128, 192 and 256 bit sizes.

+config CRYPTO_DEV_UX500_HASH
+ tristate "UX500 crypto driver for HASH block"
+ depends on CRYPTO_DEV_UX500
+ select CRYPTO_HASH
+ select CRYPTO_HMAC
+ help
+ This selects the hash driver for the UX500_HASH hardware.
+ Depends on UX500/STM DMA if running in DMA mode.
+
config CRYPTO_DEV_UX500_DEBUG
bool "Activate ux500 platform debug-mode for crypto and hash block"
depends on CRYPTO_DEV_UX500_CRYP || CRYPTO_DEV_UX500_HASH
diff --git a/drivers/crypto/ux500/Makefile b/drivers/crypto/ux500/Makefile
index beb4d37..b9a365b 100644
--- a/drivers/crypto/ux500/Makefile
+++ b/drivers/crypto/ux500/Makefile
@@ -4,4 +4,5 @@
# License terms: GNU General Public License (GPL) version 2
#

+obj-$(CONFIG_CRYPTO_DEV_UX500_HASH) += hash/
obj-$(CONFIG_CRYPTO_DEV_UX500_CRYP) += cryp/
diff --git a/drivers/crypto/ux500/hash/Makefile b/drivers/crypto/ux500/hash/Makefile
new file mode 100644
index 0000000..b2f90d9
--- /dev/null
+++ b/drivers/crypto/ux500/hash/Makefile
@@ -0,0 +1,11 @@
+#
+# Copyright (C) ST-Ericsson SA 2010
+# Author: Shujuan Chen ([email protected]stericsson.com)
+# License terms: GNU General Public License (GPL) version 2
+#
+ifdef CONFIG_CRYPTO_DEV_UX500_DEBUG
+CFLAGS_hash_core.o := -DDEBUG -O0
+endif
+
+obj-$(CONFIG_CRYPTO_DEV_UX500_HASH) += ux500_hash.o
+ux500_hash-objs := hash_core.o
diff --git a/drivers/crypto/ux500/hash/hash_alg.h b/drivers/crypto/ux500/hash/hash_alg.h
new file mode 100644
index 0000000..cd9351c
--- /dev/null
+++ b/drivers/crypto/ux500/hash/hash_alg.h
@@ -0,0 +1,395 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen ([email protected])
+ * Author: Joakim Bech ([email protected])
+ * Author: Berne Hebark ([email protected]))
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#ifndef _HASH_ALG_H
+#define _HASH_ALG_H
+
+#include <linux/bitops.h>
+
+#define HASH_BLOCK_SIZE 64
+#define HASH_DMA_ALIGN_SIZE 4
+#define HASH_DMA_PERFORMANCE_MIN_SIZE 1024
+#define HASH_BYTES_PER_WORD 4
+
+/* Maximum value of the length's high word */
+#define HASH_HIGH_WORD_MAX_VAL 0xFFFFFFFFUL
+
+/* Power on Reset values HASH registers */
+#define HASH_RESET_CR_VALUE 0x0
+#define HASH_RESET_STR_VALUE 0x0
+
+/* Number of context swap registers */
+#define HASH_CSR_COUNT 52
+
+#define HASH_RESET_CSRX_REG_VALUE 0x0
+#define HASH_RESET_CSFULL_REG_VALUE 0x0
+#define HASH_RESET_CSDATAIN_REG_VALUE 0x0
+
+#define HASH_RESET_INDEX_VAL 0x0
+#define HASH_RESET_BIT_INDEX_VAL 0x0
+#define HASH_RESET_BUFFER_VAL 0x0
+#define HASH_RESET_LEN_HIGH_VAL 0x0
+#define HASH_RESET_LEN_LOW_VAL 0x0
+
+/* Control register bitfields */
+#define HASH_CR_RESUME_MASK 0x11FCF
+
+#define HASH_CR_SWITCHON_POS 31
+#define HASH_CR_SWITCHON_MASK BIT(31)
+
+#define HASH_CR_EMPTYMSG_POS 20
+#define HASH_CR_EMPTYMSG_MASK BIT(20)
+
+#define HASH_CR_DINF_POS 12
+#define HASH_CR_DINF_MASK BIT(12)
+
+#define HASH_CR_NBW_POS 8
+#define HASH_CR_NBW_MASK 0x00000F00UL
+
+#define HASH_CR_LKEY_POS 16
+#define HASH_CR_LKEY_MASK BIT(16)
+
+#define HASH_CR_ALGO_POS 7
+#define HASH_CR_ALGO_MASK BIT(7)
+
+#define HASH_CR_MODE_POS 6
+#define HASH_CR_MODE_MASK BIT(6)
+
+#define HASH_CR_DATAFORM_POS 4
+#define HASH_CR_DATAFORM_MASK (BIT(4) | BIT(5))
+
+#define HASH_CR_DMAE_POS 3
+#define HASH_CR_DMAE_MASK BIT(3)
+
+#define HASH_CR_INIT_POS 2
+#define HASH_CR_INIT_MASK BIT(2)
+
+#define HASH_CR_PRIVN_POS 1
+#define HASH_CR_PRIVN_MASK BIT(1)
+
+#define HASH_CR_SECN_POS 0
+#define HASH_CR_SECN_MASK BIT(0)
+
+/* Start register bitfields */
+#define HASH_STR_DCAL_POS 8
+#define HASH_STR_DCAL_MASK BIT(8)
+#define HASH_STR_DEFAULT 0x0
+
+#define HASH_STR_NBLW_POS 0
+#define HASH_STR_NBLW_MASK 0x0000001FUL
+
+#define HASH_NBLW_MAX_VAL 0x1F
+
+/* PrimeCell IDs */
+#define HASH_P_ID0 0xE0
+#define HASH_P_ID1 0x05
+#define HASH_P_ID2 0x38
+#define HASH_P_ID3 0x00
+#define HASH_CELL_ID0 0x0D
+#define HASH_CELL_ID1 0xF0
+#define HASH_CELL_ID2 0x05
+#define HASH_CELL_ID3 0xB1
+
+#define HASH_SET_BITS(reg_name, mask) \
+ writel_relaxed((readl_relaxed(reg_name) | mask), reg_name)
+
+#define HASH_CLEAR_BITS(reg_name, mask) \
+ writel_relaxed((readl_relaxed(reg_name) & ~mask), reg_name)
+
+#define HASH_PUT_BITS(reg, val, shift, mask) \
+ writel_relaxed(((readl(reg) & ~(mask)) | \
+ (((u32)val << shift) & (mask))), reg)
+
+#define HASH_SET_DIN(val, len) writesl(&device_data->base->din, (val), (len))
+
+#define HASH_INITIALIZE \
+ HASH_PUT_BITS( \
+ &device_data->base->cr, \
+ 0x01, HASH_CR_INIT_POS, \
+ HASH_CR_INIT_MASK)
+
+#define HASH_SET_DATA_FORMAT(data_format) \
+ HASH_PUT_BITS( \
+ &device_data->base->cr, \
+ (u32) (data_format), HASH_CR_DATAFORM_POS, \
+ HASH_CR_DATAFORM_MASK)
+#define HASH_SET_NBLW(val) \
+ HASH_PUT_BITS( \
+ &device_data->base->str, \
+ (u32) (val), HASH_STR_NBLW_POS, \
+ HASH_STR_NBLW_MASK)
+#define HASH_SET_DCAL \
+ HASH_PUT_BITS( \
+ &device_data->base->str, \
+ 0x01, HASH_STR_DCAL_POS, \
+ HASH_STR_DCAL_MASK)
+
+/* Hardware access method */
+enum hash_mode {
+ HASH_MODE_CPU,
+ HASH_MODE_DMA
+};
+
+/**
+ * struct uint64 - Structure to handle 64 bits integers.
+ * @high_word: Most significant bits.
+ * @low_word: Least significant bits.
+ *
+ * Used to handle 64 bits integers.
+ */
+struct uint64 {
+ u32 high_word;
+ u32 low_word;
+};
+
+/**
+ * struct hash_register - Contains all registers in ux500 hash hardware.
+ * @cr: HASH control register (0x000).
+ * @din: HASH data input register (0x004).
+ * @str: HASH start register (0x008).
+ * @hx: HASH digest register 0..7 (0x00c-0x01C).
+ * @padding0: Reserved (0x02C).
+ * @itcr: Integration test control register (0x080).
+ * @itip: Integration test input register (0x084).
+ * @itop: Integration test output register (0x088).
+ * @padding1: Reserved (0x08C).
+ * @csfull: HASH context full register (0x0F8).
+ * @csdatain: HASH context swap data input register (0x0FC).
+ * @csrx: HASH context swap register 0..51 (0x100-0x1CC).
+ * @padding2: Reserved (0x1D0).
+ * @periphid0: HASH peripheral identification register 0 (0xFE0).
+ * @periphid1: HASH peripheral identification register 1 (0xFE4).
+ * @periphid2: HASH peripheral identification register 2 (0xFE8).
+ * @periphid3: HASH peripheral identification register 3 (0xFEC).
+ * @cellid0: HASH PCell identification register 0 (0xFF0).
+ * @cellid1: HASH PCell identification register 1 (0xFF4).
+ * @cellid2: HASH PCell identification register 2 (0xFF8).
+ * @cellid3: HASH PCell identification register 3 (0xFFC).
+ *
+ * The device communicates to the HASH via 32-bit-wide control registers
+ * accessible via the 32-bit width AMBA rev. 2.0 AHB Bus. Below is a structure
+ * with the registers used.
+ */
+struct hash_register {
+ u32 cr;
+ u32 din;
+ u32 str;
+ u32 hx[8];
+
+ u32 padding0[(0x080 - 0x02C) / sizeof(u32)];
+
+ u32 itcr;
+ u32 itip;
+ u32 itop;
+
+ u32 padding1[(0x0F8 - 0x08C) / sizeof(u32)];
+
+ u32 csfull;
+ u32 csdatain;
+ u32 csrx[HASH_CSR_COUNT];
+
+ u32 padding2[(0xFE0 - 0x1D0) / sizeof(u32)];
+
+ u32 periphid0;
+ u32 periphid1;
+ u32 periphid2;
+ u32 periphid3;
+
+ u32 cellid0;
+ u32 cellid1;
+ u32 cellid2;
+ u32 cellid3;
+};
+
+/**
+ * struct hash_state - Hash context state.
+ * @temp_cr: Temporary HASH Control Register.
+ * @str_reg: HASH Start Register.
+ * @din_reg: HASH Data Input Register.
+ * @csr[52]: HASH Context Swap Registers 0-39.
+ * @csfull: HASH Context Swap Registers 40 ie Status flags.
+ * @csdatain: HASH Context Swap Registers 41 ie Input data.
+ * @buffer: Working buffer for messages going to the hardware.
+ * @length: Length of the part of message hashed so far (floor(N/64) * 64).
+ * @index: Valid number of bytes in buffer (N % 64).
+ * @bit_index: Valid number of bits in buffer (N % 8).
+ *
+ * This structure is used between context switches, i.e. when ongoing jobs are
+ * interupted with new jobs. When this happens we need to store intermediate
+ * results in software.
+ *
+ * WARNING: "index" is the member of the structure, to be sure that "buffer"
+ * is aligned on a 4-bytes boundary. This is highly implementation dependent
+ * and MUST be checked whenever this code is ported on new platforms.
+ */
+struct hash_state {
+ u32 temp_cr;
+ u32 str_reg;
+ u32 din_reg;
+ u32 csr[52];
+ u32 csfull;
+ u32 csdatain;
+ u32 buffer[HASH_BLOCK_SIZE / sizeof(u32)];
+ struct uint64 length;
+ u8 index;
+ u8 bit_index;
+};
+
+/**
+ * enum hash_device_id - HASH device ID.
+ * @HASH_DEVICE_ID_0: Hash hardware with ID 0
+ * @HASH_DEVICE_ID_1: Hash hardware with ID 1
+ */
+enum hash_device_id {
+ HASH_DEVICE_ID_0 = 0,
+ HASH_DEVICE_ID_1 = 1
+};
+
+/**
+ * enum hash_data_format - HASH data format.
+ * @HASH_DATA_32_BITS: 32 bits data format
+ * @HASH_DATA_16_BITS: 16 bits data format
+ * @HASH_DATA_8_BITS: 8 bits data format.
+ * @HASH_DATA_1_BITS: 1 bit data format.
+ */
+enum hash_data_format {
+ HASH_DATA_32_BITS = 0x0,
+ HASH_DATA_16_BITS = 0x1,
+ HASH_DATA_8_BITS = 0x2,
+ HASH_DATA_1_BIT = 0x3
+};
+
+/**
+ * enum hash_algo - Enumeration for selecting between SHA1 or SHA2 algorithm.
+ * @HASH_ALGO_SHA1: Indicates that SHA1 is used.
+ * @HASH_ALGO_SHA2: Indicates that SHA2 (SHA256) is used.
+ */
+enum hash_algo {
+ HASH_ALGO_SHA1 = 0x0,
+ HASH_ALGO_SHA256 = 0x1
+};
+
+/**
+ * enum hash_op - Enumeration for selecting between HASH or HMAC mode.
+ * @HASH_OPER_MODE_HASH: Indicates usage of normal HASH mode.
+ * @HASH_OPER_MODE_HMAC: Indicates usage of HMAC.
+ */
+enum hash_op {
+ HASH_OPER_MODE_HASH = 0x0,
+ HASH_OPER_MODE_HMAC = 0x1
+};
+
+/**
+ * struct hash_config - Configuration data for the hardware.
+ * @data_format: Format of data entered into the hash data in register.
+ * @algorithm: Algorithm selection bit.
+ * @oper_mode: Operating mode selection bit.
+ */
+struct hash_config {
+ int data_format;
+ int algorithm;
+ int oper_mode;
+};
+
+/**
+ * struct hash_dma - Structure used for dma.
+ * @mask: DMA capabilities bitmap mask.
+ * @complete: Used to maintain state for a "completion".
+ * @chan_mem2hash: DMA channel.
+ * @cfg_mem2hash: DMA channel configuration.
+ * @sg_len: Scatterlist length.
+ * @sg: Scatterlist.
+ * @nents: Number of sg entries.
+ */
+struct hash_dma {
+ dma_cap_mask_t mask;
+ struct completion complete;
+ struct dma_chan *chan_mem2hash;
+ void *cfg_mem2hash;
+ int sg_len;
+ struct scatterlist *sg;
+ int nents;
+};
+
+/**
+ * struct hash_ctx - The context used for hash calculations.
+ * @key: The key used in the operation.
+ * @keylen: The length of the key.
+ * @state: The state of the current calculations.
+ * @config: The current configuration.
+ * @digestsize: The size of current digest.
+ * @device: Pointer to the device structure.
+ */
+struct hash_ctx {
+ u8 *key;
+ u32 keylen;
+ struct hash_config config;
+ int digestsize;
+ struct hash_device_data *device;
+};
+
+/**
+ * struct hash_ctx - The request context used for hash calculations.
+ * @state: The state of the current calculations.
+ * @dma_mode: Used in special cases (workaround), e.g. need to change to
+ * cpu mode, if not supported/working in dma mode.
+ * @updated: Indicates if hardware is initialized for new operations.
+ */
+struct hash_req_ctx {
+ struct hash_state state;
+ bool dma_mode;
+ u8 updated;
+};
+
+/**
+ * struct hash_device_data - structure for a hash device.
+ * @base: Pointer to the hardware base address.
+ * @list_node: For inclusion in klist.
+ * @dev: Pointer to the device dev structure.
+ * @ctx_lock: Spinlock for current_ctx.
+ * @current_ctx: Pointer to the currently allocated context.
+ * @power_state: TRUE = power state on, FALSE = power state off.
+ * @power_state_lock: Spinlock for power_state.
+ * @regulator: Pointer to the device's power control.
+ * @clk: Pointer to the device's clock control.
+ * @restore_dev_state: TRUE = saved state, FALSE = no saved state.
+ * @dma: Structure used for dma.
+ */
+struct hash_device_data {
+ struct hash_register __iomem *base;
+ struct klist_node list_node;
+ struct device *dev;
+ struct spinlock ctx_lock;
+ struct hash_ctx *current_ctx;
+ bool power_state;
+ struct spinlock power_state_lock;
+ struct regulator *regulator;
+ struct clk *clk;
+ bool restore_dev_state;
+ struct hash_state state; /* Used for saving and resuming state */
+ struct hash_dma dma;
+};
+
+int hash_check_hw(struct hash_device_data *device_data);
+
+int hash_setconfiguration(struct hash_device_data *device_data,
+ struct hash_config *config);
+
+void hash_begin(struct hash_device_data *device_data, struct hash_ctx *ctx);
+
+void hash_get_digest(struct hash_device_data *device_data,
+ u8 *digest, int algorithm);
+
+int hash_hw_update(struct ahash_request *req);
+
+int hash_save_state(struct hash_device_data *device_data,
+ struct hash_state *state);
+
+int hash_resume_state(struct hash_device_data *device_data,
+ const struct hash_state *state);
+
+#endif
diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
new file mode 100644
index 0000000..2a177c1
--- /dev/null
+++ b/drivers/crypto/ux500/hash/hash_core.c
@@ -0,0 +1,2019 @@
+/*
+ * Cryptographic API.
+ * Support for Nomadik hardware crypto engine.
+
+ * Copyright (C) ST-Ericsson SA 2010
+ * Author: Shujuan Chen <[email protected]> for ST-Ericsson
+ * Author: Joakim Bech <[email protected]> for ST-Ericsson
+ * Author: Berne Hebark <[email protected]> for ST-Ericsson.
+ * Author: Niklas Hernaeus <[email protected]> for ST-Ericsson.
+ * Author: Andreas Westin <[email protected]> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/klist.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/crypto.h>
+
+#include <linux/regulator/consumer.h>
+#include <linux/dmaengine.h>
+#include <linux/bitops.h>
+
+#include <crypto/internal/hash.h>
+#include <crypto/sha.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/algapi.h>
+
+#include <mach/crypto-ux500.h>
+#include <mach/hardware.h>
+
+#include "hash_alg.h"
+
+#define DEV_DBG_NAME "hashX hashX:"
+
+static int hash_mode;
+module_param(hash_mode, int, 0);
+MODULE_PARM_DESC(hash_mode, "CPU or DMA mode. CPU = 0 (default), DMA = 1");
+
+/**
+ * Pre-calculated empty message digests.
+ */
+static u8 zero_message_hash_sha1[SHA1_DIGEST_SIZE] = {
+ 0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d,
+ 0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90,
+ 0xaf, 0xd8, 0x07, 0x09
+};
+
+static u8 zero_message_hash_sha256[SHA256_DIGEST_SIZE] = {
+ 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
+ 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
+ 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
+ 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55
+};
+
+/* HMAC-SHA1, no key */
+static u8 zero_message_hmac_sha1[SHA1_DIGEST_SIZE] = {
+ 0xfb, 0xdb, 0x1d, 0x1b, 0x18, 0xaa, 0x6c, 0x08,
+ 0x32, 0x4b, 0x7d, 0x64, 0xb7, 0x1f, 0xb7, 0x63,
+ 0x70, 0x69, 0x0e, 0x1d
+};
+
+/* HMAC-SHA256, no key */
+static u8 zero_message_hmac_sha256[SHA256_DIGEST_SIZE] = {
+ 0xb6, 0x13, 0x67, 0x9a, 0x08, 0x14, 0xd9, 0xec,
+ 0x77, 0x2f, 0x95, 0xd7, 0x78, 0xc3, 0x5f, 0xc5,
+ 0xff, 0x16, 0x97, 0xc4, 0x93, 0x71, 0x56, 0x53,
+ 0xc6, 0xc7, 0x12, 0x14, 0x42, 0x92, 0xc5, 0xad
+};
+
+/**
+ * struct hash_driver_data - data specific to the driver.
+ *
+ * @device_list: A list of registered devices to choose from.
+ * @device_allocation: A semaphore initialized with number of devices.
+ */
+struct hash_driver_data {
+ struct klist device_list;
+ struct semaphore device_allocation;
+};
+
+static struct hash_driver_data driver_data;
+
+/* Declaration of functions */
+/**
+ * hash_messagepad - Pads a message and write the nblw bits.
+ * @device_data: Structure for the hash device.
+ * @message: Last word of a message
+ * @index_bytes: The number of bytes in the last message
+ *
+ * This function manages the final part of the digest calculation, when less
+ * than 512 bits (64 bytes) remain in message. This means index_bytes < 64.
+ *
+ */
+static void hash_messagepad(struct hash_device_data *device_data,
+ const u32 *message, u8 index_bytes);
+
+/**
+ * release_hash_device - Releases a previously allocated hash device.
+ * @device_data: Structure for the hash device.
+ *
+ */
+static void release_hash_device(struct hash_device_data *device_data)
+{
+ spin_lock(&device_data->ctx_lock);
+ device_data->current_ctx->device = NULL;
+ device_data->current_ctx = NULL;
+ spin_unlock(&device_data->ctx_lock);
+
+ /*
+ * The down_interruptible part for this semaphore is called in
+ * cryp_get_device_data.
+ */
+ up(&driver_data.device_allocation);
+}
+
+static void hash_dma_setup_channel(struct hash_device_data *device_data,
+ struct device *dev)
+{
+ struct hash_platform_data *platform_data = dev->platform_data;
+ dma_cap_zero(device_data->dma.mask);
+ dma_cap_set(DMA_SLAVE, device_data->dma.mask);
+
+ device_data->dma.cfg_mem2hash = platform_data->mem_to_engine;
+ device_data->dma.chan_mem2hash =
+ dma_request_channel(device_data->dma.mask,
+ platform_data->dma_filter,
+ device_data->dma.cfg_mem2hash);
+
+ init_completion(&device_data->dma.complete);
+}
+
+static void hash_dma_callback(void *data)
+{
+ struct hash_ctx *ctx = (struct hash_ctx *) data;
+
+ complete(&ctx->device->dma.complete);
+}
+
+static int hash_set_dma_transfer(struct hash_ctx *ctx, struct scatterlist *sg,
+ int len, enum dma_data_direction direction)
+{
+ struct dma_async_tx_descriptor *desc = NULL;
+ struct dma_chan *channel = NULL;
+ dma_cookie_t cookie;
+
+ if (direction != DMA_TO_DEVICE) {
+ dev_err(ctx->device->dev, "[%s] Invalid DMA direction",
+ __func__);
+ return -EFAULT;
+ }
+
+ sg->length = ALIGN(sg->length, HASH_DMA_ALIGN_SIZE);
+
+ channel = ctx->device->dma.chan_mem2hash;
+ ctx->device->dma.sg = sg;
+ ctx->device->dma.sg_len = dma_map_sg(channel->device->dev,
+ ctx->device->dma.sg, ctx->device->dma.nents,
+ direction);
+
+ if (!ctx->device->dma.sg_len) {
+ dev_err(ctx->device->dev,
+ "[%s]: Could not map the sg list (TO_DEVICE)",
+ __func__);
+ return -EFAULT;
+ }
+
+ dev_dbg(ctx->device->dev, "[%s]: Setting up DMA for buffer "
+ "(TO_DEVICE)", __func__);
+ desc = channel->device->device_prep_slave_sg(channel,
+ ctx->device->dma.sg, ctx->device->dma.sg_len,
+ direction, DMA_CTRL_ACK | DMA_PREP_INTERRUPT);
+ if (!desc) {
+ dev_err(ctx->device->dev,
+ "[%s]: device_prep_slave_sg() failed!", __func__);
+ return -EFAULT;
+ }
+
+ desc->callback = hash_dma_callback;
+ desc->callback_param = ctx;
+
+ cookie = desc->tx_submit(desc);
+ dma_async_issue_pending(channel);
+
+ return 0;
+}
+
+static void hash_dma_done(struct hash_ctx *ctx)
+{
+ struct dma_chan *chan;
+
+ chan = ctx->device->dma.chan_mem2hash;
+ chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
+ dma_unmap_sg(chan->device->dev, ctx->device->dma.sg,
+ ctx->device->dma.sg_len, DMA_TO_DEVICE);
+
+}
+
+static int hash_dma_write(struct hash_ctx *ctx,
+ struct scatterlist *sg, int len)
+{
+ int error = hash_set_dma_transfer(ctx, sg, len, DMA_TO_DEVICE);
+ if (error) {
+ dev_dbg(ctx->device->dev, "[%s]: hash_set_dma_transfer() "
+ "failed", __func__);
+ return error;
+ }
+
+ return len;
+}
+
+/**
+ * get_empty_message_digest - Returns a pre-calculated digest for
+ * the empty message.
+ * @device_data: Structure for the hash device.
+ * @zero_hash: Buffer to return the empty message digest.
+ * @zero_hash_size: Hash size of the empty message digest.
+ * @zero_digest: True if zero_digest returned.
+ */
+static int get_empty_message_digest(
+ struct hash_device_data *device_data,
+ u8 *zero_hash, u32 *zero_hash_size, bool *zero_digest)
+{
+ int ret = 0;
+ struct hash_ctx *ctx = device_data->current_ctx;
+ *zero_digest = false;
+
+ /**
+ * Caller responsible for ctx != NULL.
+ */
+
+ if (HASH_OPER_MODE_HASH == ctx->config.oper_mode) {
+ if (HASH_ALGO_SHA1 == ctx->config.algorithm) {
+ memcpy(zero_hash, &zero_message_hash_sha1[0],
+ SHA1_DIGEST_SIZE);
+ *zero_hash_size = SHA1_DIGEST_SIZE;
+ *zero_digest = true;
+ } else if (HASH_ALGO_SHA256 ==
+ ctx->config.algorithm) {
+ memcpy(zero_hash, &zero_message_hash_sha256[0],
+ SHA256_DIGEST_SIZE);
+ *zero_hash_size = SHA256_DIGEST_SIZE;
+ *zero_digest = true;
+ } else {
+ dev_err(device_data->dev, "[%s] "
+ "Incorrect algorithm!"
+ , __func__);
+ ret = -EINVAL;
+ goto out;
+ }
+ } else if (HASH_OPER_MODE_HMAC == ctx->config.oper_mode) {
+ if (!ctx->keylen) {
+ if (HASH_ALGO_SHA1 == ctx->config.algorithm) {
+ memcpy(zero_hash, &zero_message_hmac_sha1[0],
+ SHA1_DIGEST_SIZE);
+ *zero_hash_size = SHA1_DIGEST_SIZE;
+ *zero_digest = true;
+ } else if (HASH_ALGO_SHA256 == ctx->config.algorithm) {
+ memcpy(zero_hash, &zero_message_hmac_sha256[0],
+ SHA256_DIGEST_SIZE);
+ *zero_hash_size = SHA256_DIGEST_SIZE;
+ *zero_digest = true;
+ } else {
+ dev_err(device_data->dev, "[%s] "
+ "Incorrect algorithm!"
+ , __func__);
+ ret = -EINVAL;
+ goto out;
+ }
+ } else {
+ dev_dbg(device_data->dev, "[%s] Continue hash "
+ "calculation, since hmac key avalable",
+ __func__);
+ }
+ }
+out:
+
+ return ret;
+}
+
+/**
+ * hash_disable_power - Request to disable power and clock.
+ * @device_data: Structure for the hash device.
+ * @save_device_state: If true, saves the current hw state.
+ *
+ * This function request for disabling power (regulator) and clock,
+ * and could also save current hw state.
+ */
+static int hash_disable_power(
+ struct hash_device_data *device_data,
+ bool save_device_state)
+{
+ int ret = 0;
+ struct device *dev = device_data->dev;
+
+ spin_lock(&device_data->power_state_lock);
+ if (!device_data->power_state)
+ goto out;
+
+ if (save_device_state && device_data->current_ctx) {
+ hash_save_state(device_data,
+ &device_data->state);
+ device_data->restore_dev_state = true;
+ }
+
+ clk_disable(device_data->clk);
+ ret = regulator_disable(device_data->regulator);
+ if (ret)
+ dev_err(dev, "[%s] regulator_disable() failed!", __func__);
+
+ device_data->power_state = false;
+
+out:
+ spin_unlock(&device_data->power_state_lock);
+
+ return ret;
+}
+
+/**
+ * hash_enable_power - Request to enable power and clock.
+ * @device_data: Structure for the hash device.
+ * @restore_device_state: If true, restores a previous saved hw state.
+ *
+ * This function request for enabling power (regulator) and clock,
+ * and could also restore a previously saved hw state.
+ */
+static int hash_enable_power(
+ struct hash_device_data *device_data,
+ bool restore_device_state)
+{
+ int ret = 0;
+ struct device *dev = device_data->dev;
+
+ spin_lock(&device_data->power_state_lock);
+ if (!device_data->power_state) {
+ ret = regulator_enable(device_data->regulator);
+ if (ret) {
+ dev_err(dev, "[%s]: regulator_enable() failed!",
+ __func__);
+ goto out;
+ }
+ ret = clk_enable(device_data->clk);
+ if (ret) {
+ dev_err(dev, "[%s]: clk_enable() failed!",
+ __func__);
+ ret = regulator_disable(
+ device_data->regulator);
+ goto out;
+ }
+ device_data->power_state = true;
+ }
+
+ if (device_data->restore_dev_state) {
+ if (restore_device_state) {
+ device_data->restore_dev_state = false;
+ hash_resume_state(device_data,
+ &device_data->state);
+ }
+ }
+out:
+ spin_unlock(&device_data->power_state_lock);
+
+ return ret;
+}
+
+/**
+ * hash_get_device_data - Checks for an available hash device and return it.
+ * @hash_ctx: Structure for the hash context.
+ * @device_data: Structure for the hash device.
+ *
+ * This function check for an available hash device and return it to
+ * the caller.
+ * Note! Caller need to release the device, calling up().
+ */
+static int hash_get_device_data(struct hash_ctx *ctx,
+ struct hash_device_data **device_data)
+{
+ int ret;
+ struct klist_iter device_iterator;
+ struct klist_node *device_node;
+ struct hash_device_data *local_device_data = NULL;
+
+ /* Wait until a device is available */
+ ret = down_interruptible(&driver_data.device_allocation);
+ if (ret)
+ return ret; /* Interrupted */
+
+ /* Select a device */
+ klist_iter_init(&driver_data.device_list, &device_iterator);
+ device_node = klist_next(&device_iterator);
+ while (device_node) {
+ local_device_data = container_of(device_node,
+ struct hash_device_data, list_node);
+ spin_lock(&local_device_data->ctx_lock);
+ /* current_ctx allocates a device, NULL = unallocated */
+ if (local_device_data->current_ctx) {
+ device_node = klist_next(&device_iterator);
+ } else {
+ local_device_data->current_ctx = ctx;
+ ctx->device = local_device_data;
+ spin_unlock(&local_device_data->ctx_lock);
+ break;
+ }
+ spin_unlock(&local_device_data->ctx_lock);
+ }
+ klist_iter_exit(&device_iterator);
+
+ if (!device_node) {
+ /**
+ * No free device found.
+ * Since we allocated a device with down_interruptible, this
+ * should not be able to happen.
+ * Number of available devices, which are contained in
+ * device_allocation, is therefore decremented by not doing
+ * an up(device_allocation).
+ */
+ return -EBUSY;
+ }
+
+ *device_data = local_device_data;
+
+ return 0;
+}
+
+/**
+ * hash_hw_write_key - Writes the key to the hardware registries.
+ *
+ * @device_data: Structure for the hash device.
+ * @key: Key to be written.
+ * @keylen: The lengt of the key.
+ *
+ * Note! This function DOES NOT write to the NBLW registry, even though
+ * specified in the the hw design spec. Either due to incorrect info in the
+ * spec or due to a bug in the hw.
+ */
+static void hash_hw_write_key(struct hash_device_data *device_data,
+ const u8 *key, unsigned int keylen)
+{
+ u32 word = 0;
+ int nwords = 1;
+
+ HASH_CLEAR_BITS(&device_data->base->str, HASH_STR_NBLW_MASK);
+
+ while (keylen >= 4) {
+ u32 *key_word = (u32 *)key;
+
+ HASH_SET_DIN(key_word, nwords);
+ keylen -= 4;
+ key += 4;
+ }
+
+ /* Take care of the remaining bytes in the last word */
+ if (keylen) {
+ word = 0;
+ while (keylen) {
+ word |= (key[keylen - 1] << (8 * (keylen - 1)));
+ keylen--;
+ }
+
+ HASH_SET_DIN(&word, nwords);
+ }
+
+ while (device_data->base->str & HASH_STR_DCAL_MASK)
+ cpu_relax();
+
+ HASH_SET_DCAL;
+
+ while (device_data->base->str & HASH_STR_DCAL_MASK)
+ cpu_relax();
+}
+
+/**
+ * init_hash_hw - Initialise the hash hardware for a new calculation.
+ * @device_data: Structure for the hash device.
+ * @ctx: The hash context.
+ *
+ * This function will enable the bits needed to clear and start a new
+ * calculation.
+ */
+static int init_hash_hw(struct hash_device_data *device_data,
+ struct hash_ctx *ctx)
+{
+ int ret = 0;
+
+ ret = hash_setconfiguration(device_data, &ctx->config);
+ if (ret) {
+ dev_err(device_data->dev, "[%s] hash_setconfiguration() "
+ "failed!", __func__);
+ return ret;
+ }
+
+ hash_begin(device_data, ctx);
+
+ if (ctx->config.oper_mode == HASH_OPER_MODE_HMAC)
+ hash_hw_write_key(device_data, ctx->key, ctx->keylen);
+
+ return ret;
+}
+
+/**
+ * hash_get_nents - Return number of entries (nents) in scatterlist (sg).
+ *
+ * @sg: Scatterlist.
+ * @size: Size in bytes.
+ * @aligned: True if sg data aligned to work in DMA mode.
+ *
+ */
+static int hash_get_nents(struct scatterlist *sg, int size, bool *aligned)
+{
+ int nents = 0;
+ bool aligned_data = true;
+
+ while (size > 0 && sg) {
+ nents++;
+ size -= sg->length;
+
+ /* hash_set_dma_transfer will align last nent */
+ if ((aligned && !IS_ALIGNED(sg->offset, HASH_DMA_ALIGN_SIZE))
+ || (!IS_ALIGNED(sg->length, HASH_DMA_ALIGN_SIZE) &&
+ size > 0))
+ aligned_data = false;
+
+ sg = sg_next(sg);
+ }
+
+ if (aligned)
+ *aligned = aligned_data;
+
+ if (size != 0)
+ return -EFAULT;
+
+ return nents;
+}
+
+/**
+ * hash_dma_valid_data - checks for dma valid sg data.
+ * @sg: Scatterlist.
+ * @datasize: Datasize in bytes.
+ *
+ * NOTE! This function checks for dma valid sg data, since dma
+ * only accept datasizes of even wordsize.
+ */
+static bool hash_dma_valid_data(struct scatterlist *sg, int datasize)
+{
+ bool aligned;
+
+ /* Need to include at least one nent, else error */
+ if (hash_get_nents(sg, datasize, &aligned) < 1)
+ return false;
+
+ return aligned;
+}
+
+/**
+ * hash_init - Common hash init function for SHA1/SHA2 (SHA256).
+ * @req: The hash request for the job.
+ *
+ * Initialize structures.
+ */
+static int hash_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct hash_req_ctx *req_ctx = ahash_request_ctx(req);
+
+ if (!ctx->key)
+ ctx->keylen = 0;
+
+ memset(&req_ctx->state, 0, sizeof(struct hash_state));
+ req_ctx->updated = 0;
+ if (hash_mode == HASH_MODE_DMA) {
+ if ((ctx->config.oper_mode == HASH_OPER_MODE_HMAC) &&
+ cpu_is_u5500()) {
+ pr_debug(DEV_DBG_NAME " [%s] HMAC and DMA not working "
+ "on u5500, directing to CPU mode.",
+ __func__);
+ req_ctx->dma_mode = false; /* Don't use DMA */
+ goto out;
+ }
+
+ if (req->nbytes < HASH_DMA_ALIGN_SIZE) {
+ req_ctx->dma_mode = false; /* Don't use DMA */
+
+ pr_debug(DEV_DBG_NAME " [%s] DMA mode, but direct "
+ "to CPU mode for data size < %d",
+ __func__, HASH_DMA_ALIGN_SIZE);
+ } else {
+ if (req->nbytes >= HASH_DMA_PERFORMANCE_MIN_SIZE &&
+ hash_dma_valid_data(req->src,
+ req->nbytes)) {
+ req_ctx->dma_mode = true;
+ } else {
+ req_ctx->dma_mode = false;
+ pr_debug(DEV_DBG_NAME " [%s] DMA mode, but use"
+ " CPU mode for datalength < %d"
+ " or non-aligned data, except "
+ "in last nent", __func__,
+ HASH_DMA_PERFORMANCE_MIN_SIZE);
+ }
+ }
+ }
+out:
+ return 0;
+}
+
+/**
+ * hash_processblock - This function processes a single block of 512 bits (64
+ * bytes), word aligned, starting at message.
+ * @device_data: Structure for the hash device.
+ * @message: Block (512 bits) of message to be written to
+ * the HASH hardware.
+ *
+ */
+static void hash_processblock(
+ struct hash_device_data *device_data,
+ const u32 *message, int length)
+{
+ int len = length / HASH_BYTES_PER_WORD;
+ /*
+ * NBLW bits. Reset the number of bits in last word (NBLW).
+ */
+ HASH_CLEAR_BITS(&device_data->base->str, HASH_STR_NBLW_MASK);
+
+ /*
+ * Write message data to the HASH_DIN register.
+ */
+ HASH_SET_DIN(message, len);
+}
+
+/**
+ * hash_messagepad - Pads a message and write the nblw bits.
+ * @device_data: Structure for the hash device.
+ * @message: Last word of a message.
+ * @index_bytes: The number of bytes in the last message.
+ *
+ * This function manages the final part of the digest calculation, when less
+ * than 512 bits (64 bytes) remain in message. This means index_bytes < 64.
+ *
+ */
+static void hash_messagepad(struct hash_device_data *device_data,
+ const u32 *message, u8 index_bytes)
+{
+ int nwords = 1;
+
+ /*
+ * Clear hash str register, only clear NBLW
+ * since DCAL will be reset by hardware.
+ */
+ HASH_CLEAR_BITS(&device_data->base->str, HASH_STR_NBLW_MASK);
+
+ /* Main loop */
+ while (index_bytes >= 4) {
+ HASH_SET_DIN(message, nwords);
+ index_bytes -= 4;
+ message++;
+ }
+
+ if (index_bytes)
+ HASH_SET_DIN(message, nwords);
+
+ while (device_data->base->str & HASH_STR_DCAL_MASK)
+ cpu_relax();
+
+ /* num_of_bytes == 0 => NBLW <- 0 (32 bits valid in DATAIN) */
+ HASH_SET_NBLW(index_bytes * 8);
+ dev_dbg(device_data->dev, "[%s] DIN=0x%08x NBLW=%d", __func__,
+ readl_relaxed(&device_data->base->din),
+ (int)(readl_relaxed(&device_data->base->str) &
+ HASH_STR_NBLW_MASK));
+ HASH_SET_DCAL;
+ dev_dbg(device_data->dev, "[%s] after dcal -> DIN=0x%08x NBLW=%d",
+ __func__, readl_relaxed(&device_data->base->din),
+ (int)(readl_relaxed(&device_data->base->str) &
+ HASH_STR_NBLW_MASK));
+
+ while (device_data->base->str & HASH_STR_DCAL_MASK)
+ cpu_relax();
+}
+
+/**
+ * hash_incrementlength - Increments the length of the current message.
+ * @ctx: Hash context
+ * @incr: Length of message processed already
+ *
+ * Overflow cannot occur, because conditions for overflow are checked in
+ * hash_hw_update.
+ */
+static void hash_incrementlength(struct hash_req_ctx *ctx, u32 incr)
+{
+ ctx->state.length.low_word += incr;
+
+ /* Check for wrap-around */
+ if (ctx->state.length.low_word < incr)
+ ctx->state.length.high_word++;
+}
+
+/**
+ * hash_setconfiguration - Sets the required configuration for the hash
+ * hardware.
+ * @device_data: Structure for the hash device.
+ * @config: Pointer to a configuration structure.
+ */
+int hash_setconfiguration(struct hash_device_data *device_data,
+ struct hash_config *config)
+{
+ int ret = 0;
+
+ if (config->algorithm != HASH_ALGO_SHA1 &&
+ config->algorithm != HASH_ALGO_SHA256)
+ return -EPERM;
+
+ /*
+ * DATAFORM bits. Set the DATAFORM bits to 0b11, which means the data
+ * to be written to HASH_DIN is considered as 32 bits.
+ */
+ HASH_SET_DATA_FORMAT(config->data_format);
+
+ /*
+ * ALGO bit. Set to 0b1 for SHA-1 and 0b0 for SHA-256
+ */
+ switch (config->algorithm) {
+ case HASH_ALGO_SHA1:
+ HASH_SET_BITS(&device_data->base->cr, HASH_CR_ALGO_MASK);
+ break;
+
+ case HASH_ALGO_SHA256:
+ HASH_CLEAR_BITS(&device_data->base->cr, HASH_CR_ALGO_MASK);
+ break;
+
+ default:
+ dev_err(device_data->dev, "[%s] Incorrect algorithm.",
+ __func__);
+ return -EPERM;
+ }
+
+ /*
+ * MODE bit. This bit selects between HASH or HMAC mode for the
+ * selected algorithm. 0b0 = HASH and 0b1 = HMAC.
+ */
+ if (HASH_OPER_MODE_HASH == config->oper_mode)
+ HASH_CLEAR_BITS(&device_data->base->cr,
+ HASH_CR_MODE_MASK);
+ else if (HASH_OPER_MODE_HMAC == config->oper_mode) {
+ HASH_SET_BITS(&device_data->base->cr,
+ HASH_CR_MODE_MASK);
+ if (device_data->current_ctx->keylen > HASH_BLOCK_SIZE) {
+ /* Truncate key to blocksize */
+ dev_dbg(device_data->dev, "[%s] LKEY set", __func__);
+ HASH_SET_BITS(&device_data->base->cr,
+ HASH_CR_LKEY_MASK);
+ } else {
+ dev_dbg(device_data->dev, "[%s] LKEY cleared",
+ __func__);
+ HASH_CLEAR_BITS(&device_data->base->cr,
+ HASH_CR_LKEY_MASK);
+ }
+ } else { /* Wrong hash mode */
+ ret = -EPERM;
+ dev_err(device_data->dev, "[%s] HASH_INVALID_PARAMETER!",
+ __func__);
+ }
+ return ret;
+}
+
+/**
+ * hash_begin - This routine resets some globals and initializes the hash
+ * hardware.
+ * @device_data: Structure for the hash device.
+ * @ctx: Hash context.
+ */
+void hash_begin(struct hash_device_data *device_data, struct hash_ctx *ctx)
+{
+ /* HW and SW initializations */
+ /* Note: there is no need to initialize buffer and digest members */
+
+ while (device_data->base->str & HASH_STR_DCAL_MASK)
+ cpu_relax();
+
+ /*
+ * INIT bit. Set this bit to 0b1 to reset the HASH processor core and
+ * prepare the initialize the HASH accelerator to compute the message
+ * digest of a new message.
+ */
+ HASH_INITIALIZE;
+
+ /*
+ * NBLW bits. Reset the number of bits in last word (NBLW).
+ */
+ HASH_CLEAR_BITS(&device_data->base->str, HASH_STR_NBLW_MASK);
+}
+
+int hash_process_data(
+ struct hash_device_data *device_data,
+ struct hash_ctx *ctx, struct hash_req_ctx *req_ctx,
+ int msg_length, u8 *data_buffer, u8 *buffer, u8 *index)
+{
+ int ret = 0;
+ u32 count;
+
+ do {
+ if ((*index + msg_length) < HASH_BLOCK_SIZE) {
+ for (count = 0; count < msg_length; count++) {
+ buffer[*index + count] =
+ *(data_buffer + count);
+ }
+ *index += msg_length;
+ msg_length = 0;
+ } else {
+ if (req_ctx->updated) {
+
+ ret = hash_resume_state(device_data,
+ &device_data->state);
+ memmove(req_ctx->state.buffer,
+ device_data->state.buffer,
+ HASH_BLOCK_SIZE / sizeof(u32));
+ if (ret) {
+ dev_err(device_data->dev, "[%s] "
+ "hash_resume_state()"
+ " failed!", __func__);
+ goto out;
+ }
+ } else {
+ ret = init_hash_hw(device_data, ctx);
+ if (ret) {
+ dev_err(device_data->dev, "[%s] "
+ "init_hash_hw()"
+ " failed!", __func__);
+ goto out;
+ }
+ req_ctx->updated = 1;
+ }
+ /*
+ * If 'data_buffer' is four byte aligned and
+ * local buffer does not have any data, we can
+ * write data directly from 'data_buffer' to
+ * HW peripheral, otherwise we first copy data
+ * to a local buffer
+ */
+ if ((0 == (((u32)data_buffer) % 4))
+ && (0 == *index))
+ hash_processblock(device_data,
+ (const u32 *)
+ data_buffer, HASH_BLOCK_SIZE);
+ else {
+ for (count = 0; count <
+ (u32)(HASH_BLOCK_SIZE -
+ *index);
+ count++) {
+ buffer[*index + count] =
+ *(data_buffer + count);
+ }
+ hash_processblock(device_data,
+ (const u32 *)buffer,
+ HASH_BLOCK_SIZE);
+ }
+ hash_incrementlength(req_ctx, HASH_BLOCK_SIZE);
+ data_buffer += (HASH_BLOCK_SIZE - *index);
+
+ msg_length -= (HASH_BLOCK_SIZE - *index);
+ *index = 0;
+
+ ret = hash_save_state(device_data,
+ &device_data->state);
+
+ memmove(device_data->state.buffer,
+ req_ctx->state.buffer,
+ HASH_BLOCK_SIZE / sizeof(u32));
+ if (ret) {
+ dev_err(device_data->dev, "[%s] "
+ "hash_save_state()"
+ " failed!", __func__);
+ goto out;
+ }
+ }
+ } while (msg_length != 0);
+out:
+
+ return ret;
+}
+
+/**
+ * hash_dma_final - The hash dma final function for SHA1/SHA256.
+ * @req: The hash request for the job.
+ */
+static int hash_dma_final(struct ahash_request *req)
+{
+ int ret = 0;
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct hash_req_ctx *req_ctx = ahash_request_ctx(req);
+ struct hash_device_data *device_data;
+ u8 digest[SHA256_DIGEST_SIZE];
+ int bytes_written = 0;
+
+ ret = hash_get_device_data(ctx, &device_data);
+ if (ret)
+ return ret;
+
+ dev_dbg(device_data->dev, "[%s] (ctx=0x%x)!", __func__, (u32) ctx);
+
+ if (req_ctx->updated) {
+ ret = hash_resume_state(device_data, &device_data->state);
+
+ if (ret) {
+ dev_err(device_data->dev, "[%s] hash_resume_state() "
+ "failed!", __func__);
+ goto out;
+ }
+
+ }
+
+ if (!req_ctx->updated) {
+ ret = hash_setconfiguration(device_data, &ctx->config);
+ if (ret) {
+ dev_err(device_data->dev, "[%s] "
+ "hash_setconfiguration() failed!",
+ __func__);
+ goto out;
+ }
+
+ /* Enable DMA input */
+ if (hash_mode != HASH_MODE_DMA || !req_ctx->dma_mode) {
+ HASH_CLEAR_BITS(&device_data->base->cr,
+ HASH_CR_DMAE_MASK);
+ } else {
+ HASH_SET_BITS(&device_data->base->cr,
+ HASH_CR_DMAE_MASK);
+ HASH_SET_BITS(&device_data->base->cr,
+ HASH_CR_PRIVN_MASK);
+ }
+
+ HASH_INITIALIZE;
+
+ if (ctx->config.oper_mode == HASH_OPER_MODE_HMAC)
+ hash_hw_write_key(device_data, ctx->key, ctx->keylen);
+
+ /* Number of bits in last word = (nbytes * 8) % 32 */
+ HASH_SET_NBLW((req->nbytes * 8) % 32);
+ req_ctx->updated = 1;
+ }
+
+ /* Store the nents in the dma struct. */
+ ctx->device->dma.nents = hash_get_nents(req->src, req->nbytes, NULL);
+ if (!ctx->device->dma.nents) {
+ dev_err(device_data->dev, "[%s] "
+ "ctx->device->dma.nents = 0", __func__);
+ goto out;
+ }
+
+ bytes_written = hash_dma_write(ctx, req->src, req->nbytes);
+ if (bytes_written != req->nbytes) {
+ dev_err(device_data->dev, "[%s] "
+ "hash_dma_write() failed!", __func__);
+ goto out;
+ }
+
+ wait_for_completion(&ctx->device->dma.complete);
+ hash_dma_done(ctx);
+
+ while (device_data->base->str & HASH_STR_DCAL_MASK)
+ cpu_relax();
+
+ if (ctx->config.oper_mode == HASH_OPER_MODE_HMAC && ctx->key) {
+ unsigned int keylen = ctx->keylen;
+ u8 *key = ctx->key;
+
+ dev_dbg(device_data->dev, "[%s] keylen: %d", __func__,
+ ctx->keylen);
+ hash_hw_write_key(device_data, key, keylen);
+ }
+
+ hash_get_digest(device_data, digest, ctx->config.algorithm);
+ memcpy(req->result, digest, ctx->digestsize);
+
+out:
+ release_hash_device(device_data);
+
+ /**
+ * Allocated in setkey, and only used in HMAC.
+ */
+ kfree(ctx->key);
+
+ return ret;
+}
+
+/**
+ * hash_hw_final - The final hash calculation function
+ * @req: The hash request for the job.
+ */
+int hash_hw_final(struct ahash_request *req)
+{
+ int ret = 0;
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct hash_req_ctx *req_ctx = ahash_request_ctx(req);
+ struct hash_device_data *device_data;
+ u8 digest[SHA256_DIGEST_SIZE];
+
+ ret = hash_get_device_data(ctx, &device_data);
+ if (ret)
+ return ret;
+
+ dev_dbg(device_data->dev, "[%s] (ctx=0x%x)!", __func__, (u32) ctx);
+
+ if (req_ctx->updated) {
+ ret = hash_resume_state(device_data, &device_data->state);
+
+ if (ret) {
+ dev_err(device_data->dev, "[%s] hash_resume_state() "
+ "failed!", __func__);
+ goto out;
+ }
+ } else if (req->nbytes == 0 && ctx->keylen == 0) {
+ u8 zero_hash[SHA256_DIGEST_SIZE];
+ u32 zero_hash_size = 0;
+ bool zero_digest = false;
+ /**
+ * Use a pre-calculated empty message digest
+ * (workaround since hw return zeroes, hw bug!?)
+ */
+ ret = get_empty_message_digest(device_data, &zero_hash[0],
+ &zero_hash_size, &zero_digest);
+ if (!ret && likely(zero_hash_size == ctx->digestsize) &&
+ zero_digest) {
+ memcpy(req->result, &zero_hash[0], ctx->digestsize);
+ goto out;
+ } else if (!ret && !zero_digest) {
+ dev_dbg(device_data->dev, "[%s] HMAC zero msg with "
+ "key, continue...", __func__);
+ } else {
+ dev_err(device_data->dev, "[%s] ret=%d, or wrong "
+ "digest size? %s", __func__, ret,
+ (zero_hash_size == ctx->digestsize) ?
+ "true" : "false");
+ /* Return error */
+ goto out;
+ }
+ } else if (req->nbytes == 0 && ctx->keylen > 0) {
+ dev_err(device_data->dev, "[%s] Empty message with "
+ "keylength > 0, NOT supported.", __func__);
+ goto out;
+ }
+
+ if (!req_ctx->updated) {
+ ret = init_hash_hw(device_data, ctx);
+ if (ret) {
+ dev_err(device_data->dev, "[%s] init_hash_hw() "
+ "failed!", __func__);
+ goto out;
+ }
+ }
+
+ if (req_ctx->state.index) {
+ hash_messagepad(device_data, req_ctx->state.buffer,
+ req_ctx->state.index);
+ } else {
+ HASH_SET_DCAL;
+ while (device_data->base->str & HASH_STR_DCAL_MASK)
+ cpu_relax();
+ }
+
+ if (ctx->config.oper_mode == HASH_OPER_MODE_HMAC && ctx->key) {
+ unsigned int keylen = ctx->keylen;
+ u8 *key = ctx->key;
+
+ dev_dbg(device_data->dev, "[%s] keylen: %d", __func__,
+ ctx->keylen);
+ hash_hw_write_key(device_data, key, keylen);
+ }
+
+ hash_get_digest(device_data, digest, ctx->config.algorithm);
+ memcpy(req->result, digest, ctx->digestsize);
+
+out:
+ release_hash_device(device_data);
+
+ /**
+ * Allocated in setkey, and only used in HMAC.
+ */
+ kfree(ctx->key);
+
+ return ret;
+}
+
+/**
+ * hash_hw_update - Updates current HASH computation hashing another part of
+ * the message.
+ * @req: Byte array containing the message to be hashed (caller
+ * allocated).
+ */
+int hash_hw_update(struct ahash_request *req)
+{
+ int ret = 0;
+ u8 index = 0;
+ u8 *buffer;
+ struct hash_device_data *device_data;
+ u8 *data_buffer;
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct hash_req_ctx *req_ctx = ahash_request_ctx(req);
+ struct crypto_hash_walk walk;
+ int msg_length = crypto_hash_walk_first(req, &walk);
+
+ /* Empty message ("") is correct indata */
+ if (msg_length == 0)
+ return ret;
+
+ index = req_ctx->state.index;
+ buffer = (u8 *)req_ctx->state.buffer;
+
+ /* Check if ctx->state.length + msg_length
+ overflows */
+ if (msg_length > (req_ctx->state.length.low_word + msg_length) &&
+ HASH_HIGH_WORD_MAX_VAL ==
+ req_ctx->state.length.high_word) {
+ pr_err(DEV_DBG_NAME " [%s] HASH_MSG_LENGTH_OVERFLOW!",
+ __func__);
+ return -EPERM;
+ }
+
+ ret = hash_get_device_data(ctx, &device_data);
+ if (ret)
+ return ret;
+
+ /* Main loop */
+ while (0 != msg_length) {
+ data_buffer = walk.data;
+ ret = hash_process_data(device_data, ctx, req_ctx, msg_length,
+ data_buffer, buffer, &index);
+
+ if (ret) {
+ dev_err(device_data->dev, "[%s] hash_internal_hw_"
+ "update() failed!", __func__);
+ goto out;
+ }
+
+ msg_length = crypto_hash_walk_done(&walk, 0);
+ }
+
+ req_ctx->state.index = index;
+ dev_dbg(device_data->dev, "[%s] indata length=%d, bin=%d))",
+ __func__, req_ctx->state.index,
+ req_ctx->state.bit_index);
+
+out:
+ release_hash_device(device_data);
+
+ return ret;
+}
+
+/**
+ * hash_resume_state - Function that resumes the state of an calculation.
+ * @device_data: Pointer to the device structure.
+ * @device_state: The state to be restored in the hash hardware
+ */
+int hash_resume_state(struct hash_device_data *device_data,
+ const struct hash_state *device_state)
+{
+ u32 temp_cr;
+ s32 count;
+ int hash_mode = HASH_OPER_MODE_HASH;
+
+ if (NULL == device_state) {
+ dev_err(device_data->dev, "[%s] HASH_INVALID_PARAMETER!",
+ __func__);
+ return -EPERM;
+ }
+
+ /* Check correctness of index and length members */
+ if (device_state->index > HASH_BLOCK_SIZE
+ || (device_state->length.low_word % HASH_BLOCK_SIZE) != 0) {
+ dev_err(device_data->dev, "[%s] HASH_INVALID_PARAMETER!",
+ __func__);
+ return -EPERM;
+ }
+
+ /*
+ * INIT bit. Set this bit to 0b1 to reset the HASH processor core and
+ * prepare the initialize the HASH accelerator to compute the message
+ * digest of a new message.
+ */
+ HASH_INITIALIZE;
+
+ temp_cr = device_state->temp_cr;
+ writel_relaxed(temp_cr & HASH_CR_RESUME_MASK, &device_data->base->cr);
+
+ if (device_data->base->cr & HASH_CR_MODE_MASK)
+ hash_mode = HASH_OPER_MODE_HMAC;
+ else
+ hash_mode = HASH_OPER_MODE_HASH;
+
+ for (count = 0; count < HASH_CSR_COUNT; count++) {
+ if ((count >= 36) && (hash_mode == HASH_OPER_MODE_HASH))
+ break;
+
+ writel_relaxed(device_state->csr[count],
+ &device_data->base->csrx[count]);
+ }
+
+ writel_relaxed(device_state->csfull, &device_data->base->csfull);
+ writel_relaxed(device_state->csdatain, &device_data->base->csdatain);
+
+ writel_relaxed(device_state->str_reg, &device_data->base->str);
+ writel_relaxed(temp_cr, &device_data->base->cr);
+
+ return 0;
+}
+
+/**
+ * hash_save_state - Function that saves the state of hardware.
+ * @device_data: Pointer to the device structure.
+ * @device_state: The strucure where the hardware state should be saved.
+ */
+int hash_save_state(struct hash_device_data *device_data,
+ struct hash_state *device_state)
+{
+ u32 temp_cr;
+ u32 count;
+ int hash_mode = HASH_OPER_MODE_HASH;
+
+ if (NULL == device_state) {
+ dev_err(device_data->dev, "[%s] HASH_INVALID_PARAMETER!",
+ __func__);
+ return -ENOTSUPP;
+ }
+
+ /* Write dummy value to force digest intermediate calculation. This
+ * actually makes sure that there isn't any ongoing calculation in the
+ * hardware.
+ */
+ while (device_data->base->str & HASH_STR_DCAL_MASK)
+ cpu_relax();
+
+ temp_cr = readl_relaxed(&device_data->base->cr);
+
+ device_state->str_reg = readl_relaxed(&device_data->base->str);
+
+ device_state->din_reg = readl_relaxed(&device_data->base->din);
+
+ if (device_data->base->cr & HASH_CR_MODE_MASK)
+ hash_mode = HASH_OPER_MODE_HMAC;
+ else
+ hash_mode = HASH_OPER_MODE_HASH;
+
+ for (count = 0; count < HASH_CSR_COUNT; count++) {
+ if ((count >= 36) && (hash_mode == HASH_OPER_MODE_HASH))
+ break;
+
+ device_state->csr[count] =
+ readl_relaxed(&device_data->base->csrx[count]);
+ }
+
+ device_state->csfull = readl_relaxed(&device_data->base->csfull);
+ device_state->csdatain = readl_relaxed(&device_data->base->csdatain);
+
+ device_state->temp_cr = temp_cr;
+
+ return 0;
+}
+
+/**
+ * hash_check_hw - This routine checks for peripheral Ids and PCell Ids.
+ * @device_data:
+ *
+ */
+int hash_check_hw(struct hash_device_data *device_data)
+{
+ /* Checking Peripheral Ids */
+ if (HASH_P_ID0 == readl_relaxed(&device_data->base->periphid0)
+ && HASH_P_ID1 == readl_relaxed(&device_data->base->periphid1)
+ && HASH_P_ID2 == readl_relaxed(&device_data->base->periphid2)
+ && HASH_P_ID3 == readl_relaxed(&device_data->base->periphid3)
+ && HASH_CELL_ID0 == readl_relaxed(&device_data->base->cellid0)
+ && HASH_CELL_ID1 == readl_relaxed(&device_data->base->cellid1)
+ && HASH_CELL_ID2 == readl_relaxed(&device_data->base->cellid2)
+ && HASH_CELL_ID3 == readl_relaxed(&device_data->base->cellid3)
+ ) {
+ return 0;
+ }
+
+ dev_err(device_data->dev, "[%s] HASH_UNSUPPORTED_HW!",
+ __func__);
+ return -ENOTSUPP;
+}
+
+/**
+ * hash_get_digest - Gets the digest.
+ * @device_data: Pointer to the device structure.
+ * @digest: User allocated byte array for the calculated digest.
+ * @algorithm: The algorithm in use.
+ */
+void hash_get_digest(struct hash_device_data *device_data,
+ u8 *digest, int algorithm)
+{
+ u32 temp_hx_val, count;
+ int loop_ctr;
+
+ if (algorithm != HASH_ALGO_SHA1 && algorithm != HASH_ALGO_SHA256) {
+ dev_err(device_data->dev, "[%s] Incorrect algorithm %d",
+ __func__, algorithm);
+ return;
+ }
+
+ if (algorithm == HASH_ALGO_SHA1)
+ loop_ctr = SHA1_DIGEST_SIZE / sizeof(u32);
+ else
+ loop_ctr = SHA256_DIGEST_SIZE / sizeof(u32);
+
+ dev_dbg(device_data->dev, "[%s] digest array:(0x%x)",
+ __func__, (u32) digest);
+
+ /* Copy result into digest array */
+ for (count = 0; count < loop_ctr; count++) {
+ temp_hx_val = readl_relaxed(&device_data->base->hx[count]);
+ digest[count * 4] = (u8) ((temp_hx_val >> 24) & 0xFF);
+ digest[count * 4 + 1] = (u8) ((temp_hx_val >> 16) & 0xFF);
+ digest[count * 4 + 2] = (u8) ((temp_hx_val >> 8) & 0xFF);
+ digest[count * 4 + 3] = (u8) ((temp_hx_val >> 0) & 0xFF);
+ }
+}
+
+/**
+ * hash_update - The hash update function for SHA1/SHA2 (SHA256).
+ * @req: The hash request for the job.
+ */
+static int ahash_update(struct ahash_request *req)
+{
+ int ret = 0;
+ struct hash_req_ctx *req_ctx = ahash_request_ctx(req);
+
+ if (hash_mode != HASH_MODE_DMA || !req_ctx->dma_mode)
+ ret = hash_hw_update(req);
+ /* Skip update for DMA, all data will be passed to DMA in final */
+
+ if (ret) {
+ pr_err(DEV_DBG_NAME " [%s] hash_hw_update() failed!",
+ __func__);
+ }
+
+ return ret;
+}
+
+/**
+ * hash_final - The hash final function for SHA1/SHA2 (SHA256).
+ * @req: The hash request for the job.
+ */
+static int ahash_final(struct ahash_request *req)
+{
+ int ret = 0;
+ struct hash_req_ctx *req_ctx = ahash_request_ctx(req);
+
+ pr_debug(DEV_DBG_NAME " [%s] data size: %d", __func__, req->nbytes);
+
+ if ((hash_mode == HASH_MODE_DMA) && req_ctx->dma_mode)
+ ret = hash_dma_final(req);
+ else
+ ret = hash_hw_final(req);
+
+ if (ret) {
+ pr_err(DEV_DBG_NAME " [%s] hash_hw/dma_final() failed",
+ __func__);
+ }
+
+ return ret;
+}
+
+static int hash_setkey(struct crypto_ahash *tfm,
+ const u8 *key, unsigned int keylen, int alg)
+{
+ int ret = 0;
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ /**
+ * Freed in final.
+ */
+ ctx->key = kmalloc(keylen, GFP_KERNEL);
+ if (!ctx->key) {
+ pr_err(DEV_DBG_NAME " [%s] Failed to allocate ctx->key "
+ "for %d\n", __func__, alg);
+ return -ENOMEM;
+ }
+
+ memcpy(ctx->key, key, keylen);
+ ctx->keylen = keylen;
+
+ return ret;
+}
+
+static int ahash_sha1_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ctx->config.data_format = HASH_DATA_8_BITS;
+ ctx->config.algorithm = HASH_ALGO_SHA1;
+ ctx->config.oper_mode = HASH_OPER_MODE_HASH;
+ ctx->digestsize = SHA1_DIGEST_SIZE;
+
+ return hash_init(req);
+}
+
+static int ahash_sha256_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ctx->config.data_format = HASH_DATA_8_BITS;
+ ctx->config.algorithm = HASH_ALGO_SHA256;
+ ctx->config.oper_mode = HASH_OPER_MODE_HASH;
+ ctx->digestsize = SHA256_DIGEST_SIZE;
+
+ return hash_init(req);
+}
+
+static int ahash_sha1_digest(struct ahash_request *req)
+{
+ int ret2, ret1;
+
+ ret1 = ahash_sha1_init(req);
+ if (ret1)
+ goto out;
+
+ ret1 = ahash_update(req);
+ ret2 = ahash_final(req);
+
+out:
+ return ret1 ? ret1 : ret2;
+}
+
+static int ahash_sha256_digest(struct ahash_request *req)
+{
+ int ret2, ret1;
+
+ ret1 = ahash_sha256_init(req);
+ if (ret1)
+ goto out;
+
+ ret1 = ahash_update(req);
+ ret2 = ahash_final(req);
+
+out:
+ return ret1 ? ret1 : ret2;
+}
+
+static int hmac_sha1_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ctx->config.data_format = HASH_DATA_8_BITS;
+ ctx->config.algorithm = HASH_ALGO_SHA1;
+ ctx->config.oper_mode = HASH_OPER_MODE_HMAC;
+ ctx->digestsize = SHA1_DIGEST_SIZE;
+
+ return hash_init(req);
+}
+
+static int hmac_sha256_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ctx->config.data_format = HASH_DATA_8_BITS;
+ ctx->config.algorithm = HASH_ALGO_SHA256;
+ ctx->config.oper_mode = HASH_OPER_MODE_HMAC;
+ ctx->digestsize = SHA256_DIGEST_SIZE;
+
+ return hash_init(req);
+}
+
+static int hmac_sha1_digest(struct ahash_request *req)
+{
+ int ret2, ret1;
+
+ ret1 = hmac_sha1_init(req);
+ if (ret1)
+ goto out;
+
+ ret1 = ahash_update(req);
+ ret2 = ahash_final(req);
+
+out:
+ return ret1 ? ret1 : ret2;
+}
+
+static int hmac_sha256_digest(struct ahash_request *req)
+{
+ int ret2, ret1;
+
+ ret1 = hmac_sha256_init(req);
+ if (ret1)
+ goto out;
+
+ ret1 = ahash_update(req);
+ ret2 = ahash_final(req);
+
+out:
+ return ret1 ? ret1 : ret2;
+}
+
+static int hmac_sha1_setkey(struct crypto_ahash *tfm,
+ const u8 *key, unsigned int keylen)
+{
+ return hash_setkey(tfm, key, keylen, HASH_ALGO_SHA1);
+}
+
+static int hmac_sha256_setkey(struct crypto_ahash *tfm,
+ const u8 *key, unsigned int keylen)
+{
+ return hash_setkey(tfm, key, keylen, HASH_ALGO_SHA256);
+}
+
+struct hash_algo_template {
+ struct hash_config conf;
+ struct ahash_alg hash;
+};
+
+static int hash_cra_init(struct crypto_tfm *tfm)
+{
+ struct hash_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct hash_algo_template *hash_alg;
+
+ hash_alg = container_of(__crypto_ahash_alg(alg),
+ struct hash_algo_template,
+ hash);
+
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct hash_req_ctx));
+
+ ctx->config.data_format = HASH_DATA_8_BITS;
+ ctx->config.algorithm = hash_alg->conf.algorithm;
+ ctx->config.oper_mode = hash_alg->conf.oper_mode;
+
+ ctx->digestsize = hash_alg->hash.halg.digestsize;
+
+ return 0;
+}
+
+static struct hash_algo_template hash_algs[] = {
+ {
+ .conf.algorithm = HASH_ALGO_SHA1,
+ .conf.oper_mode = HASH_OPER_MODE_HASH,
+ .hash = {
+ .init = hash_init,
+ .update = ahash_update,
+ .final = ahash_final,
+ .digest = ahash_sha1_digest,
+ .halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct hash_ctx),
+ .halg.base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "sha1-ux500",
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct hash_ctx),
+ .cra_init = hash_cra_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+ {
+ .conf.algorithm = HASH_ALGO_SHA256,
+ .conf.oper_mode = HASH_OPER_MODE_HASH,
+ .hash = {
+ .init = hash_init,
+ .update = ahash_update,
+ .final = ahash_final,
+ .digest = ahash_sha256_digest,
+ .halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct hash_ctx),
+ .halg.base = {
+ .cra_name = "sha256",
+ .cra_driver_name = "sha256-ux500",
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct hash_ctx),
+ .cra_type = &crypto_ahash_type,
+ .cra_init = hash_cra_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+
+ },
+ {
+ .conf.algorithm = HASH_ALGO_SHA1,
+ .conf.oper_mode = HASH_OPER_MODE_HMAC,
+ .hash = {
+ .init = hash_init,
+ .update = ahash_update,
+ .final = ahash_final,
+ .digest = hmac_sha1_digest,
+ .setkey = hmac_sha1_setkey,
+ .halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct hash_ctx),
+ .halg.base = {
+ .cra_name = "hmac(sha1)",
+ .cra_driver_name = "hmac-sha1-ux500",
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct hash_ctx),
+ .cra_type = &crypto_ahash_type,
+ .cra_init = hash_cra_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+ {
+ .conf.algorithm = HASH_ALGO_SHA256,
+ .conf.oper_mode = HASH_OPER_MODE_HMAC,
+ .hash = {
+ .init = hash_init,
+ .update = ahash_update,
+ .final = ahash_final,
+ .digest = hmac_sha256_digest,
+ .setkey = hmac_sha256_setkey,
+ .halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.statesize = sizeof(struct hash_ctx),
+ .halg.base = {
+ .cra_name = "hmac(sha256)",
+ .cra_driver_name = "hmac-sha256-ux500",
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct hash_ctx),
+ .cra_type = &crypto_ahash_type,
+ .cra_init = hash_cra_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ }
+};
+
+/**
+ * hash_algs_register_all -
+ */
+static int ahash_algs_register_all(struct hash_device_data *device_data)
+{
+ int ret;
+ int i;
+ int count;
+
+ for (i = 0; i < ARRAY_SIZE(hash_algs); i++) {
+ ret = crypto_register_ahash(&hash_algs[i].hash);
+ if (ret) {
+ count = i;
+ dev_err(device_data->dev, "[%s] alg registration failed",
+ hash_algs[i].hash.halg.base.cra_driver_name);
+ goto unreg;
+ }
+ }
+ return 0;
+unreg:
+ for (i = 0; i < count; i++)
+ crypto_unregister_ahash(&hash_algs[i].hash);
+ return ret;
+}
+
+/**
+ * hash_algs_unregister_all -
+ */
+static void ahash_algs_unregister_all(struct hash_device_data *device_data)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hash_algs); i++)
+ crypto_unregister_ahash(&hash_algs[i].hash);
+}
+
+/**
+ * ux500_hash_probe - Function that probes the hash hardware.
+ * @pdev: The platform device.
+ */
+static int ux500_hash_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct resource *res = NULL;
+ struct hash_device_data *device_data;
+ struct device *dev = &pdev->dev;
+
+ device_data = kzalloc(sizeof(struct hash_device_data), GFP_ATOMIC);
+ if (!device_data) {
+ dev_dbg(dev, "[%s] kzalloc() failed!", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ device_data->dev = dev;
+ device_data->current_ctx = NULL;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_dbg(dev, "[%s] platform_get_resource() failed!", __func__);
+ ret = -ENODEV;
+ goto out_kfree;
+ }
+
+ res = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (res == NULL) {
+ dev_dbg(dev, "[%s] request_mem_region() failed!", __func__);
+ ret = -EBUSY;
+ goto out_kfree;
+ }
+
+ device_data->base = ioremap(res->start, resource_size(res));
+ if (!device_data->base) {
+ dev_err(dev, "[%s] ioremap() failed!",
+ __func__);
+ ret = -ENOMEM;
+ goto out_free_mem;
+ }
+ spin_lock_init(&device_data->ctx_lock);
+ spin_lock_init(&device_data->power_state_lock);
+
+ /* Enable power for HASH1 hardware block */
+ device_data->regulator = regulator_get(dev, "v-ape");
+ if (IS_ERR(device_data->regulator)) {
+ dev_err(dev, "[%s] regulator_get() failed!", __func__);
+ ret = PTR_ERR(device_data->regulator);
+ device_data->regulator = NULL;
+ goto out_unmap;
+ }
+
+ /* Enable the clock for HASH1 hardware block */
+ device_data->clk = clk_get(dev, NULL);
+ if (IS_ERR(device_data->clk)) {
+ dev_err(dev, "[%s] clk_get() failed!", __func__);
+ ret = PTR_ERR(device_data->clk);
+ goto out_regulator;
+ }
+
+ /* Enable device power (and clock) */
+ ret = hash_enable_power(device_data, false);
+ if (ret) {
+ dev_err(dev, "[%s]: hash_enable_power() failed!", __func__);
+ goto out_clk;
+ }
+
+ ret = hash_check_hw(device_data);
+ if (ret) {
+ dev_err(dev, "[%s] hash_check_hw() failed!", __func__);
+ goto out_power;
+ }
+
+ if (hash_mode == HASH_MODE_DMA)
+ hash_dma_setup_channel(device_data, dev);
+
+ platform_set_drvdata(pdev, device_data);
+
+ /* Put the new device into the device list... */
+ klist_add_tail(&device_data->list_node, &driver_data.device_list);
+ /* ... and signal that a new device is available. */
+ up(&driver_data.device_allocation);
+
+ ret = ahash_algs_register_all(device_data);
+ if (ret) {
+ dev_err(dev, "[%s] ahash_algs_register_all() "
+ "failed!", __func__);
+ goto out_power;
+ }
+
+ dev_info(dev, "[%s] successfully probed\n", __func__);
+ return 0;
+
+out_power:
+ hash_disable_power(device_data, false);
+
+out_clk:
+ clk_put(device_data->clk);
+
+out_regulator:
+ regulator_put(device_data->regulator);
+
+out_unmap:
+ iounmap(device_data->base);
+
+out_free_mem:
+ release_mem_region(res->start, resource_size(res));
+
+out_kfree:
+ kfree(device_data);
+out:
+ return ret;
+}
+
+/**
+ * ux500_hash_remove - Function that removes the hash device from the platform.
+ * @pdev: The platform device.
+ */
+static int ux500_hash_remove(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct hash_device_data *device_data;
+ struct device *dev = &pdev->dev;
+
+ device_data = platform_get_drvdata(pdev);
+ if (!device_data) {
+ dev_err(dev, "[%s]: platform_get_drvdata() failed!",
+ __func__);
+ return -ENOMEM;
+ }
+
+ /* Try to decrease the number of available devices. */
+ if (down_trylock(&driver_data.device_allocation))
+ return -EBUSY;
+
+ /* Check that the device is free */
+ spin_lock(&device_data->ctx_lock);
+ /* current_ctx allocates a device, NULL = unallocated */
+ if (device_data->current_ctx) {
+ /* The device is busy */
+ spin_unlock(&device_data->ctx_lock);
+ /* Return the device to the pool. */
+ up(&driver_data.device_allocation);
+ return -EBUSY;
+ }
+
+ spin_unlock(&device_data->ctx_lock);
+
+ /* Remove the device from the list */
+ if (klist_node_attached(&device_data->list_node))
+ klist_remove(&device_data->list_node);
+
+ /* If this was the last device, remove the services */
+ if (list_empty(&driver_data.device_list.k_list))
+ ahash_algs_unregister_all(device_data);
+
+ if (hash_disable_power(device_data, false))
+ dev_err(dev, "[%s]: hash_disable_power() failed",
+ __func__);
+
+ clk_put(device_data->clk);
+ regulator_put(device_data->regulator);
+
+ iounmap(device_data->base);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res)
+ release_mem_region(res->start, resource_size(res));
+
+ kfree(device_data);
+
+ return 0;
+}
+
+/**
+ * ux500_hash_shutdown - Function that shutdown the hash device.
+ * @pdev: The platform device
+ */
+static void ux500_hash_shutdown(struct platform_device *pdev)
+{
+ struct resource *res = NULL;
+ struct hash_device_data *device_data;
+
+ device_data = platform_get_drvdata(pdev);
+ if (!device_data) {
+ dev_err(&pdev->dev, "[%s] platform_get_drvdata() failed!",
+ __func__);
+ return;
+ }
+
+ /* Check that the device is free */
+ spin_lock(&device_data->ctx_lock);
+ /* current_ctx allocates a device, NULL = unallocated */
+ if (!device_data->current_ctx) {
+ if (down_trylock(&driver_data.device_allocation))
+ dev_dbg(&pdev->dev, "[%s]: Cryp still in use!"
+ "Shutting down anyway...", __func__);
+ /**
+ * (Allocate the device)
+ * Need to set this to non-null (dummy) value,
+ * to avoid usage if context switching.
+ */
+ device_data->current_ctx++;
+ }
+ spin_unlock(&device_data->ctx_lock);
+
+ /* Remove the device from the list */
+ if (klist_node_attached(&device_data->list_node))
+ klist_remove(&device_data->list_node);
+
+ /* If this was the last device, remove the services */
+ if (list_empty(&driver_data.device_list.k_list))
+ ahash_algs_unregister_all(device_data);
+
+ iounmap(device_data->base);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res)
+ release_mem_region(res->start, resource_size(res));
+
+ if (hash_disable_power(device_data, false))
+ dev_err(&pdev->dev, "[%s] hash_disable_power() failed",
+ __func__);
+}
+
+/**
+ * ux500_hash_suspend - Function that suspends the hash device.
+ * @pdev: The platform device.
+ * @state: -
+ */
+static int ux500_hash_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ int ret;
+ struct hash_device_data *device_data;
+ struct hash_ctx *temp_ctx = NULL;
+
+ device_data = platform_get_drvdata(pdev);
+ if (!device_data) {
+ dev_err(&pdev->dev, "[%s] platform_get_drvdata() failed!",
+ __func__);
+ return -ENOMEM;
+ }
+
+ spin_lock(&device_data->ctx_lock);
+ if (!device_data->current_ctx)
+ device_data->current_ctx++;
+ spin_unlock(&device_data->ctx_lock);
+
+ if (device_data->current_ctx == ++temp_ctx) {
+ if (down_interruptible(&driver_data.device_allocation))
+ dev_dbg(&pdev->dev, "[%s]: down_interruptible() "
+ "failed", __func__);
+ ret = hash_disable_power(device_data, false);
+
+ } else
+ ret = hash_disable_power(device_data, true);
+
+ if (ret)
+ dev_err(&pdev->dev, "[%s]: hash_disable_power()", __func__);
+
+ return ret;
+}
+
+/**
+ * ux500_hash_resume - Function that resume the hash device.
+ * @pdev: The platform device.
+ */
+static int ux500_hash_resume(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct hash_device_data *device_data;
+ struct hash_ctx *temp_ctx = NULL;
+
+ device_data = platform_get_drvdata(pdev);
+ if (!device_data) {
+ dev_err(&pdev->dev, "[%s] platform_get_drvdata() failed!",
+ __func__);
+ return -ENOMEM;
+ }
+
+ spin_lock(&device_data->ctx_lock);
+ if (device_data->current_ctx == ++temp_ctx)
+ device_data->current_ctx = NULL;
+ spin_unlock(&device_data->ctx_lock);
+
+ if (!device_data->current_ctx)
+ up(&driver_data.device_allocation);
+ else
+ ret = hash_enable_power(device_data, true);
+
+ if (ret)
+ dev_err(&pdev->dev, "[%s]: hash_enable_power() failed!",
+ __func__);
+
+ return ret;
+}
+
+static struct platform_driver hash_driver = {
+ .probe = ux500_hash_probe,
+ .remove = ux500_hash_remove,
+ .shutdown = ux500_hash_shutdown,
+ .suspend = ux500_hash_suspend,
+ .resume = ux500_hash_resume,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "hash1",
+ }
+};
+
+/**
+ * ux500_hash_mod_init - The kernel module init function.
+ */
+static int __init ux500_hash_mod_init(void)
+{
+ klist_init(&driver_data.device_list, NULL, NULL);
+ /* Initialize the semaphore to 0 devices (locked state) */
+ sema_init(&driver_data.device_allocation, 0);
+
+ return platform_driver_register(&hash_driver);
+}
+
+/**
+ * ux500_hash_mod_fini - The kernel module exit function.
+ */
+static void __exit ux500_hash_mod_fini(void)
+{
+ platform_driver_unregister(&hash_driver);
+ return;
+}
+
+module_init(ux500_hash_mod_init);
+module_exit(ux500_hash_mod_fini);
+
+MODULE_DESCRIPTION("Driver for ST-Ericsson UX500 HASH engine.");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS("sha1-all");
+MODULE_ALIAS("sha256-all");
+MODULE_ALIAS("hmac-sha1-all");
+MODULE_ALIAS("hmac-sha256-all");
--
1.7.10

2012-04-23 09:17:49

by Andreas Westin

[permalink] [raw]
Subject: [PATCH v6 3/3] mach-ux500: Crypto: core support for CRYP/HASH module.

This adds the required platform data and calls to enable
the CRYP/HASH driver.

Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Andreas Westin <[email protected]>
---
arch/arm/mach-ux500/board-mop500.c | 48 ++++++++++++++++++++++++++++
arch/arm/mach-ux500/board-u5500.c | 48 ++++++++++++++++++++++++++++
arch/arm/mach-ux500/clock.c | 18 ++++++-----
arch/arm/mach-ux500/devices-common.c | 16 ++++++++++
arch/arm/mach-ux500/devices-common.h | 23 +++++++++++++
arch/arm/mach-ux500/devices-db5500.h | 4 +++
arch/arm/mach-ux500/devices-db8500.h | 4 +++
arch/arm/mach-ux500/include/mach/devices.h | 3 ++
arch/arm/mach-ux500/ste-dma40-db5500.h | 9 ++++--
9 files changed, 162 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index 5c00712..4e9bcd6 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -44,6 +44,7 @@
#include <mach/setup.h>
#include <mach/devices.h>
#include <mach/irqs.h>
+#include <mach/crypto-ux500.h>

#include "pins-db8500.h"
#include "ste-dma40-db8500.h"
@@ -409,6 +410,45 @@ static void mop500_prox_deactivate(struct device *dev)
regulator_put(prox_regulator);
}

+static struct cryp_platform_data u8500_cryp1_platform_data = {
+ .mem_to_engine = {
+ .dir = STEDMA40_MEM_TO_PERIPH,
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY,
+ .dst_dev_type = DB8500_DMA_DEV48_CAC1_TX,
+ .src_info.data_width = STEDMA40_WORD_WIDTH,
+ .dst_info.data_width = STEDMA40_WORD_WIDTH,
+ .mode = STEDMA40_MODE_LOGICAL,
+ .src_info.psize = STEDMA40_PSIZE_LOG_4,
+ .dst_info.psize = STEDMA40_PSIZE_LOG_4,
+ },
+ .engine_to_mem = {
+ .dir = STEDMA40_PERIPH_TO_MEM,
+ .src_dev_type = DB8500_DMA_DEV48_CAC1_RX,
+ .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
+ .src_info.data_width = STEDMA40_WORD_WIDTH,
+ .dst_info.data_width = STEDMA40_WORD_WIDTH,
+ .mode = STEDMA40_MODE_LOGICAL,
+ .src_info.psize = STEDMA40_PSIZE_LOG_4,
+ .dst_info.psize = STEDMA40_PSIZE_LOG_4,
+ }
+};
+
+static struct stedma40_chan_cfg u8500_hash_dma_cfg_tx = {
+ .dir = STEDMA40_MEM_TO_PERIPH,
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY,
+ .dst_dev_type = DB8500_DMA_DEV50_HAC1_TX,
+ .src_info.data_width = STEDMA40_WORD_WIDTH,
+ .dst_info.data_width = STEDMA40_WORD_WIDTH,
+ .mode = STEDMA40_MODE_LOGICAL,
+ .src_info.psize = STEDMA40_PSIZE_LOG_16,
+ .dst_info.psize = STEDMA40_PSIZE_LOG_16,
+};
+
+static struct hash_platform_data u8500_hash1_platform_data = {
+ .mem_to_engine = &u8500_hash_dma_cfg_tx,
+ .dma_filter = stedma40_filter,
+};
+
/* add any platform devices here - TODO */
static struct platform_device *mop500_platform_devs[] __initdata = {
&mop500_gpio_keys_device,
@@ -594,6 +634,12 @@ static void __init mop500_uart_init(void)
db8500_add_uart2(&uart2_plat);
}

+static void __init u8500_cryp1_hash1_init(void)
+{
+ db8500_add_cryp1(&u8500_cryp1_platform_data);
+ db8500_add_hash1(&u8500_hash1_platform_data);
+}
+
static struct platform_device *snowball_platform_devs[] __initdata = {
&snowball_led_dev,
&snowball_key_dev,
@@ -611,6 +657,8 @@ static void __init mop500_init_machine(void)

mop500_pins_init();

+ u8500_cryp1_hash1_init();
+
platform_add_devices(mop500_platform_devs,
ARRAY_SIZE(mop500_platform_devs));

diff --git a/arch/arm/mach-ux500/board-u5500.c b/arch/arm/mach-ux500/board-u5500.c
index 9de9e9c..865aaf8 100644
--- a/arch/arm/mach-ux500/board-u5500.c
+++ b/arch/arm/mach-ux500/board-u5500.c
@@ -23,9 +23,11 @@
#include <mach/hardware.h>
#include <mach/devices.h>
#include <mach/setup.h>
+#include <mach/crypto-ux500.h>

#include "pins-db5500.h"
#include "devices-db5500.h"
+#include "ste-dma40-db5500.h"
#include <linux/led-lm3530.h>

/*
@@ -89,6 +91,45 @@ static struct lm3530_platform_data u5500_als_platform_data = {
.brt_val = 0x7F, /* Max brightness */
};

+static struct cryp_platform_data u5500_cryp1_platform_data = {
+ .mem_to_engine = {
+ .dir = STEDMA40_MEM_TO_PERIPH,
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY,
+ .dst_dev_type = DB5500_DMA_DEV48_CRYPTO1_TX,
+ .src_info.data_width = STEDMA40_WORD_WIDTH,
+ .dst_info.data_width = STEDMA40_WORD_WIDTH,
+ .mode = STEDMA40_MODE_LOGICAL,
+ .src_info.psize = STEDMA40_PSIZE_LOG_4,
+ .dst_info.psize = STEDMA40_PSIZE_LOG_4,
+ },
+ .engine_to_mem = {
+ .dir = STEDMA40_PERIPH_TO_MEM,
+ .src_dev_type = DB5500_DMA_DEV48_CRYPTO1_RX,
+ .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
+ .src_info.data_width = STEDMA40_WORD_WIDTH,
+ .dst_info.data_width = STEDMA40_WORD_WIDTH,
+ .mode = STEDMA40_MODE_LOGICAL,
+ .src_info.psize = STEDMA40_PSIZE_LOG_4,
+ .dst_info.psize = STEDMA40_PSIZE_LOG_4,
+ }
+};
+
+static struct stedma40_chan_cfg u5500_hash_dma_cfg_tx = {
+ .dir = STEDMA40_MEM_TO_PERIPH,
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY,
+ .dst_dev_type = DB5500_DMA_DEV50_HASH1_TX,
+ .src_info.data_width = STEDMA40_WORD_WIDTH,
+ .dst_info.data_width = STEDMA40_WORD_WIDTH,
+ .mode = STEDMA40_MODE_LOGICAL,
+ .src_info.psize = STEDMA40_PSIZE_LOG_16,
+ .dst_info.psize = STEDMA40_PSIZE_LOG_16,
+};
+
+static struct hash_platform_data u5500_hash1_platform_data = {
+ .mem_to_engine = &u5500_hash_dma_cfg_tx,
+ .dma_filter = stedma40_filter,
+};
+
static struct i2c_board_info __initdata u5500_i2c2_devices[] = {
{
/* Backlight */
@@ -103,6 +144,12 @@ static void __init u5500_i2c_init(void)
i2c_register_board_info(2, ARRAY_AND_SIZE(u5500_i2c2_devices));
}

+static void __init u5500_cryp1_hash1_init(void)
+{
+ db5500_add_cryp1(&u5500_cryp1_platform_data);
+ db5500_add_hash1(&u5500_hash1_platform_data);
+}
+
static struct ab5500_platform_data ab5500_plf_data = {
.irq = {
.base = 0,
@@ -140,6 +187,7 @@ static void __init u5500_init_machine(void)
u5500_i2c_init();
u5500_sdi_init();
u5500_uart_init();
+ u5500_cryp1_hash1_init();

platform_add_devices(u5500_platform_devices,
ARRAY_SIZE(u5500_platform_devices));
diff --git a/arch/arm/mach-ux500/clock.c b/arch/arm/mach-ux500/clock.c
index 7379075..0b4e40c 100644
--- a/arch/arm/mach-ux500/clock.c
+++ b/arch/arm/mach-ux500/clock.c
@@ -375,14 +375,15 @@ static DEFINE_PRCC_CLK(5, usb, 0, 0, NULL);
/* Peripheral Cluster #6 */

/* MTU ID in data */
-static DEFINE_PRCC_CLK_CUSTOM(6, mtu1, 8, -1, NULL, clk_mtu_get_rate, 1);
-static DEFINE_PRCC_CLK_CUSTOM(6, mtu0, 7, -1, NULL, clk_mtu_get_rate, 0);
-static DEFINE_PRCC_CLK(6, cfgreg, 6, 6, NULL);
-static DEFINE_PRCC_CLK(6, hash1, 5, -1, NULL);
-static DEFINE_PRCC_CLK(6, unipro, 4, 1, &clk_uniproclk);
-static DEFINE_PRCC_CLK(6, pka, 3, -1, NULL);
-static DEFINE_PRCC_CLK(6, hash0, 2, -1, NULL);
-static DEFINE_PRCC_CLK(6, cryp0, 1, -1, NULL);
+static DEFINE_PRCC_CLK_CUSTOM(6, mtu1, 9, -1, NULL, clk_mtu_get_rate, 1);
+static DEFINE_PRCC_CLK_CUSTOM(6, mtu0, 8, -1, NULL, clk_mtu_get_rate, 0);
+static DEFINE_PRCC_CLK(6, cfgreg, 7, 7, NULL);
+static DEFINE_PRCC_CLK(6, hash1, 6, -1, NULL);
+static DEFINE_PRCC_CLK(6, unipro, 5, 1, &clk_uniproclk);
+static DEFINE_PRCC_CLK(6, pka, 4, -1, NULL);
+static DEFINE_PRCC_CLK(6, hash0, 3, -1, NULL);
+static DEFINE_PRCC_CLK(6, cryp0, 2, -1, NULL);
+static DEFINE_PRCC_CLK(6, cryp1, 1, -1, NULL);
static DEFINE_PRCC_CLK(6, rng, 0, 0, &clk_rngclk);

static struct clk clk_dummy_apb_pclk = {
@@ -424,6 +425,7 @@ static struct clk_lookup u8500_clks[] = {
CLK(pka, "pka", NULL),
CLK(hash0, "hash0", NULL),
CLK(cryp0, "cryp0", NULL),
+ CLK(cryp1, "cryp1", NULL),

/* PRCMU level clock gating */

diff --git a/arch/arm/mach-ux500/devices-common.c b/arch/arm/mach-ux500/devices-common.c
index c563e54..e2dbb4e 100644
--- a/arch/arm/mach-ux500/devices-common.c
+++ b/arch/arm/mach-ux500/devices-common.c
@@ -108,6 +108,22 @@ dbx500_add_platform_device_4k1irq(const char *name, int id,
ARRAY_SIZE(resources));
}

+struct platform_device *
+dbx500_add_platform_device_noirq(const char *name, int id,
+ resource_size_t base, void *pdata)
+{
+ struct resource resources[] = {
+ [0] = {
+ .start = base,
+ .end = base + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ }
+ };
+
+ return dbx500_add_platform_device(name, id, pdata, resources,
+ ARRAY_SIZE(resources));
+}
+
static struct platform_device *
dbx500_add_gpio(int id, resource_size_t addr, int irq,
struct nmk_gpio_platform_data *pdata)
diff --git a/arch/arm/mach-ux500/devices-common.h b/arch/arm/mach-ux500/devices-common.h
index 7825705..d4fea76 100644
--- a/arch/arm/mach-ux500/devices-common.h
+++ b/arch/arm/mach-ux500/devices-common.h
@@ -17,6 +17,10 @@ dbx500_add_platform_device_4k1irq(const char *name, int id,
resource_size_t base,
int irq, void *pdata);

+extern struct platform_device *
+dbx500_add_platform_device_noirq(const char *name, int id,
+ resource_size_t base, void *pdata);
+
struct spi_master_cntlr;

static inline struct amba_device *
@@ -79,6 +83,25 @@ dbx500_add_rtc(resource_size_t base, int irq)
return dbx500_add_amba_device("rtc-pl031", base, irq, NULL, 0);
}

+struct cryp_platform_data;
+
+static inline struct platform_device *
+dbx500_add_cryp1(int id, resource_size_t base, int irq,
+ struct cryp_platform_data *pdata)
+{
+ return dbx500_add_platform_device_4k1irq("cryp1", id, base, irq,
+ pdata);
+}
+
+struct hash_platform_data;
+
+static inline struct platform_device *
+dbx500_add_hash1(int id, resource_size_t base,
+ struct hash_platform_data *pdata)
+{
+ return dbx500_add_platform_device_noirq("hash1", id, base, pdata);
+}
+
struct nmk_gpio_platform_data;

void dbx500_add_gpios(resource_size_t *base, int num, int irq,
diff --git a/arch/arm/mach-ux500/devices-db5500.h b/arch/arm/mach-ux500/devices-db5500.h
index 0c4bccd..d40ce40 100644
--- a/arch/arm/mach-ux500/devices-db5500.h
+++ b/arch/arm/mach-ux500/devices-db5500.h
@@ -76,4 +76,8 @@
#define db5500_add_uart3(plat) \
dbx500_add_uart("uart3", U5500_UART3_BASE, IRQ_DB5500_UART3, plat)

+#define db5500_add_cryp1(pdata) \
+ dbx500_add_cryp1(-1, U5500_CRYP1_BASE, IRQ_DB5500_CRYP1, pdata)
+#define db5500_add_hash1(pdata) \
+ dbx500_add_hash1(-1, U5500_HASH1_BASE, pdata)
#endif
diff --git a/arch/arm/mach-ux500/devices-db8500.h b/arch/arm/mach-ux500/devices-db8500.h
index cbd4a9a..8fa045c 100644
--- a/arch/arm/mach-ux500/devices-db8500.h
+++ b/arch/arm/mach-ux500/devices-db8500.h
@@ -98,4 +98,8 @@ db8500_add_ssp(const char *name, resource_size_t base, int irq,
#define db8500_add_uart2(pdata) \
dbx500_add_uart("uart2", U8500_UART2_BASE, IRQ_DB8500_UART2, pdata)

+#define db8500_add_cryp1(pdata) \
+ dbx500_add_cryp1(-1, U8500_CRYP1_BASE, IRQ_DB8500_CRYP1, pdata)
+#define db8500_add_hash1(pdata) \
+ dbx500_add_hash1(-1, U8500_HASH1_BASE, pdata)
#endif
diff --git a/arch/arm/mach-ux500/include/mach/devices.h b/arch/arm/mach-ux500/include/mach/devices.h
index 5f6cb71..a55454a 100644
--- a/arch/arm/mach-ux500/include/mach/devices.h
+++ b/arch/arm/mach-ux500/include/mach/devices.h
@@ -15,6 +15,9 @@ extern struct platform_device u8500_gpio_devs[];

extern struct amba_device ux500_pl031_device;

+extern struct platform_device ux500_hash1_device;
+extern struct platform_device ux500_cryp1_device;
+
extern struct platform_device u8500_dma40_device;
extern struct platform_device ux500_ske_keypad_device;

diff --git a/arch/arm/mach-ux500/ste-dma40-db5500.h b/arch/arm/mach-ux500/ste-dma40-db5500.h
index cb2110c..c35f454 100644
--- a/arch/arm/mach-ux500/ste-dma40-db5500.h
+++ b/arch/arm/mach-ux500/ste-dma40-db5500.h
@@ -42,7 +42,10 @@ enum dma_src_dev_type {
DB5500_DMA_DEV26_SDMMC2_RX = 26,
DB5500_DMA_DEV27_SDMMC3_RX = 27,
DB5500_DMA_DEV28_SDMMC4_RX = 28,
- /* 29 - 32 not used */
+ /* 29 not used */
+ DB5500_DMA_DEV30_HASH1_TX = 30, /* v2 */
+ DB5500_DMA_DEV31_CRYPTO1_RX = 31, /* v2 */
+ /* 32 not used */
DB5500_DMA_DEV33_SDMMC0_RX = 33,
DB5500_DMA_DEV34_SDMMC1_RX = 34,
DB5500_DMA_DEV35_SDMMC2_RX = 35,
@@ -56,10 +59,10 @@ enum dma_src_dev_type {
DB5500_DMA_DEV43_USB_OTG_IEP_5_13 = 43,
DB5500_DMA_DEV44_USB_OTG_IEP_6_14 = 44,
DB5500_DMA_DEV45_USB_OTG_IEP_7_15 = 45,
- /* 46 not used */
+ DB5500_DMA_DEV46_CRYPTO1_RX = 46, /* v2 */
DB5500_DMA_DEV47_MCDE_RX = 47,
DB5500_DMA_DEV48_CRYPTO1_RX = 48,
- /* 49, 50 not used */
+ /* 49 - 50 not used */
DB5500_DMA_DEV49_I2C1_RX = 51,
DB5500_DMA_DEV50_I2C3_RX = 52,
DB5500_DMA_DEV51_I2C2_RX = 53,
--
1.7.10

2012-04-27 01:33:21

by Herbert Xu

[permalink] [raw]
Subject: Re: [PATCH v6 1/3] crypto: ux500: Add driver for CRYP hardware.

On Mon, Apr 23, 2012 at 10:48:53AM +0200, Andreas Westin wrote:
>
> +config CRYPTO_DEV_UX500
> + tristate "Driver for ST-Ericsson UX500 crypto hardware acceleration"
> + #depends on ARCH_UX500
> + select CRYPTO_ALGAPI
> + help
> + Driver for ST-Ericsson UX500 crypto engine.

Please fix up the arch dependency so it doesn't break non-ux500
builds.

Thanks!
--
Email: Herbert Xu <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt