Add support for controlling and communicating with mt8183's system
control processor (SCP), using the remoteproc & rpmsg framework.
And also add a cros_ec driver for CrOS EC host command over rpmsg.
The overall structure of the series is:
* remoteproc/mtk_scp.c: Control the start / stop of SCP (Patch 2, 3).
* remoteproc/mtk_scp_ipi.c: Communicates to SCP using inter-processor
interrupt (IPI) and shared memory (Patch 2, 3).
* rpmsg/mtk_rpmsg.c: Wrapper to wrap the IPI communication into a rpmsg
device. Supports name service for SCP firmware to
announce channels (Patch 4).
* add scp dts node to mt8183 platform (Patch 5).
This series (In particular, Patch 5) is based on
https://patchwork.kernel.org/cover/10962385/.
Changes from v10:
- Drop applied cros_ec_rpmsg patches.
- Add clock reset before loading SCP firmware.
- Fix some type mismatch warnings when printing debug messages.
Changes from v9:
- Remove reserve-memory-vpu_share node.
- Remove change to cros_ec_commands.h (That is already in
https://lore.kernel.org/lkml/20190518063949.GY4319@dell/T/)
Changes from v8:
- Rebased onto https://patchwork.kernel.org/cover/10962385/.
- Drop merged cros_ec_rpmsg patch, and add scp dts node patch.
- Add more reserved memory region.
Changes from v7:
- Rebase onto https://lore.kernel.org/patchwork/patch/1059196/.
- Fix clock enable/disable timing for SCP driver.
- Add more SCP IPI ID.
Changes from v6:
- Decouple mtk_rpmsg from mtk_scp.
- Change data of EC response to be aligned to 4 bytes.
Changes from v5:
- Add device tree binding document for cros_ec_rpmsg.
- Better document in comments for cros_ec_rpmsg.
- Remove dependency on CONFIG_ in binding tree document.
Changes from v4:
- Merge patch 6 (Load ELF firmware) into patch 2, so the driver loads
ELF firmware by default, and no longer accept plain binary.
- rpmsg_device listed in device tree (as a child of the SCP node) would
have it's device tree node mapped to the rpmsg_device, so the rpmsg
driver can use the properties on device tree.
Changes from v3:
- Make writing to SCP SRAM aligned.
- Add a new patch (Patch 6) to load ELF instead of bin firmware.
- Add host event support for EC driver.
- Fix some bugs found in testing (missing spin_lock_init,
rproc_subdev_unprepare to rproc_subdev_stop).
- Fix some coding style issue found by checkpatch.pl.
Changes from v2:
- Fold patch 3 into patch 2 in v2.
- Move IPI id around to support cross-testing for old and new firmware.
- Finish more TODO items.
Changes from v1:
- Extract functions and rename variables in mtk_scp.c.
- Do cleanup properly in mtk_rpmsg.c, which also removes the problem of
short-lived work items.
- Code format fix based on feedback for cros_ec_rpmsg.c.
- Extract feature detection for SCP into separate patch (Patch 6).
Eddie Huang (1):
arm64: dts: mt8183: add scp node
Erin Lo (3):
dt-bindings: Add a binding for Mediatek SCP
remoteproc/mediatek: add SCP support for mt8183
remoteproc: mt8183: add reserved memory manager API
Pi-Hsun Shih (1):
rpmsg: add rpmsg support for mt8183 SCP.
.../bindings/remoteproc/mtk,scp.txt | 36 +
arch/arm64/boot/dts/mediatek/mt8183-evb.dts | 11 +
arch/arm64/boot/dts/mediatek/mt8183.dtsi | 12 +
drivers/remoteproc/Kconfig | 10 +
drivers/remoteproc/Makefile | 1 +
drivers/remoteproc/mtk_common.h | 79 ++
drivers/remoteproc/mtk_scp.c | 683 ++++++++++++++++++
drivers/remoteproc/mtk_scp_ipi.c | 163 +++++
drivers/rpmsg/Kconfig | 9 +
drivers/rpmsg/Makefile | 1 +
drivers/rpmsg/mtk_rpmsg.c | 396 ++++++++++
include/linux/platform_data/mtk_scp.h | 167 +++++
include/linux/rpmsg/mtk_rpmsg.h | 30 +
13 files changed, 1598 insertions(+)
create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
create mode 100644 drivers/remoteproc/mtk_common.h
create mode 100644 drivers/remoteproc/mtk_scp.c
create mode 100644 drivers/remoteproc/mtk_scp_ipi.c
create mode 100644 drivers/rpmsg/mtk_rpmsg.c
create mode 100644 include/linux/platform_data/mtk_scp.h
create mode 100644 include/linux/rpmsg/mtk_rpmsg.h
--
2.22.0.rc2.383.gf4fbbf30c2-goog
From: Eddie Huang <[email protected]>
Add scp node to mt8183 and mt8183-evb
Signed-off-by: Erin Lo <[email protected]>
Signed-off-by: Pi-Hsun Shih <[email protected]>
Signed-off-by: Eddie Huang <[email protected]>
---
Changes from v10:
- No change.
Changes from v9:
- Remove extra reserve-memory-vpu_share node.
Changes from v8:
- New patch.
---
arch/arm64/boot/dts/mediatek/mt8183-evb.dts | 11 +++++++++++
arch/arm64/boot/dts/mediatek/mt8183.dtsi | 12 ++++++++++++
2 files changed, 23 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
index d8e555cbb5d3..e46e34ce3159 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
@@ -24,6 +24,17 @@
chosen {
stdout-path = "serial0:921600n8";
};
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ scp_mem_reserved: scp_mem_region {
+ compatible = "shared-dma-pool";
+ reg = <0 0x50000000 0 0x2900000>;
+ no-map;
+ };
+ };
};
&auxadc {
diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
index c2749c4631bc..133146b52904 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
@@ -254,6 +254,18 @@
clock-names = "spi", "wrap";
};
+ scp: scp@10500000 {
+ compatible = "mediatek,mt8183-scp";
+ reg = <0 0x10500000 0 0x80000>,
+ <0 0x105c0000 0 0x5000>;
+ reg-names = "sram", "cfg";
+ interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&infracfg CLK_INFRA_SCPSYS>;
+ clock-names = "main";
+ memory-region = <&scp_mem_reserved>;
+ status = "disabled";
+ };
+
auxadc: auxadc@11001000 {
compatible = "mediatek,mt8183-auxadc",
"mediatek,mt8173-auxadc";
--
2.22.0.rc2.383.gf4fbbf30c2-goog
From: Erin Lo <[email protected]>
Provide a basic driver to control Cortex M4 co-processor
Signed-off-by: Erin Lo <[email protected]>
Signed-off-by: Nicolas Boichat <[email protected]>
Signed-off-by: Pi-Hsun Shih <[email protected]>
---
Changes from v10:
- Add a clock reset before loading firmware.
Changes from v9:
- No change.
Changes from v8:
- Add a missing space.
Changes from v7:
- Moved the location of shared SCP buffer.
- Fix clock enable/disable sequence.
- Add more IPI ID that would be used.
Changes from v6:
- No change.
Changes from v5:
- Changed some space to tab.
Changes from v4:
- Rename most function from mtk_scp_* to scp_*.
- Change the irq to threaded handler.
- Load ELF file instead of plain binary file as firmware by default
(Squashed patch 6 in v4 into this patch).
Changes from v3:
- Fix some issue found by checkpatch.
- Make writes aligned in scp_ipi_send.
Changes from v2:
- Squash patch 3 from v2 (separate the ipi interface) into this patch.
- Remove unused name argument from scp_ipi_register.
- Add scp_ipi_unregister for proper cleanup.
- Move IPI ids in sync with firmware.
- Add mb() in proper place, and correctly clear the run->signaled.
Changes from v1:
- Extract functions and rename variables in mtk_scp.c.
---
drivers/remoteproc/Kconfig | 9 +
drivers/remoteproc/Makefile | 1 +
drivers/remoteproc/mtk_common.h | 77 ++++
drivers/remoteproc/mtk_scp.c | 517 ++++++++++++++++++++++++++
drivers/remoteproc/mtk_scp_ipi.c | 162 ++++++++
include/linux/platform_data/mtk_scp.h | 141 +++++++
6 files changed, 907 insertions(+)
create mode 100644 drivers/remoteproc/mtk_common.h
create mode 100644 drivers/remoteproc/mtk_scp.c
create mode 100644 drivers/remoteproc/mtk_scp_ipi.c
create mode 100644 include/linux/platform_data/mtk_scp.h
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 0df301be6d9a..0c2a1cb7ebc1 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -23,6 +23,15 @@ config IMX_REMOTEPROC
It's safe to say N here.
+config MTK_SCP
+ tristate "Mediatek SCP support"
+ depends on ARCH_MEDIATEK
+ help
+ Say y here to support Mediatek's System Companion Processor (SCP) via
+ the remote processor framework.
+
+ It's safe to say N here.
+
config OMAP_REMOTEPROC
tristate "OMAP remoteproc support"
depends on ARCH_OMAP4 || SOC_OMAP5
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index ce5d061e92be..16b3e5e7a81c 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -10,6 +10,7 @@ remoteproc-y += remoteproc_sysfs.o
remoteproc-y += remoteproc_virtio.o
remoteproc-y += remoteproc_elf_loader.o
obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o
+obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o
obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o
obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
new file mode 100644
index 000000000000..bd0eb7d2d5b2
--- /dev/null
+++ b/drivers/remoteproc/mtk_common.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ */
+
+#ifndef __RPROC_MTK_COMMON_H
+#define __RPROC_MTK_COMMON_H
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+
+#define MT8183_SW_RSTN 0x0
+#define MT8183_SW_RSTN_BIT BIT(0)
+#define MT8183_SCP_TO_HOST 0x1C
+#define MT8183_SCP_IPC_INT_BIT BIT(0)
+#define MT8183_SCP_WDT_INT_BIT BIT(8)
+#define MT8183_HOST_TO_SCP 0x28
+#define MT8183_HOST_IPC_INT_BIT BIT(0)
+#define MT8183_SCP_CLK_SW_SEL 0x4000
+#define MT8183_SCP_CLK_DIV_SEL 0x4024
+#define MT8183_SCP_SRAM_PDN 0x402C
+
+#define SCP_FW_VER_LEN 32
+
+struct scp_run {
+ u32 signaled;
+ s8 fw_ver[SCP_FW_VER_LEN];
+ u32 dec_capability;
+ u32 enc_capability;
+ wait_queue_head_t wq;
+};
+
+struct scp_ipi_desc {
+ scp_ipi_handler_t handler;
+ void *priv;
+};
+
+struct mtk_scp {
+ struct device *dev;
+ struct rproc *rproc;
+ struct clk *clk;
+ void __iomem *reg_base;
+ void __iomem *sram_base;
+ size_t sram_size;
+
+ struct share_obj *recv_buf;
+ struct share_obj *send_buf;
+ struct scp_run run;
+ struct mutex lock; /* for protecting mtk_scp data structure */
+ struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
+ bool ipi_id_ack[SCP_IPI_MAX];
+ wait_queue_head_t ack_wq;
+
+ void __iomem *cpu_addr;
+ phys_addr_t phys_addr;
+ size_t dram_size;
+};
+
+/**
+ * struct share_obj - SRAM buffer shared with
+ * AP and SCP
+ *
+ * @id: IPI id
+ * @len: share buffer length
+ * @share_buf: share buffer data
+ */
+struct share_obj {
+ s32 id;
+ u32 len;
+ u8 share_buf[288];
+};
+
+void scp_memcpy_aligned(void *dst, const void *src, unsigned int len);
+
+#endif
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
new file mode 100644
index 000000000000..d98cf385b055
--- /dev/null
+++ b/drivers/remoteproc/mtk_scp.c
@@ -0,0 +1,517 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2018 MediaTek Inc.
+
+#include <asm/barrier.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_data/mtk_scp.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+
+#include "mtk_common.h"
+#include "remoteproc_internal.h"
+
+#define MAX_CODE_SIZE 0x500000
+#define SCP_FW_END 0x7C000
+
+struct platform_device *scp_get_pdev(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *scp_node;
+ struct platform_device *scp_pdev;
+
+ scp_node = of_parse_phandle(dev->of_node, "mediatek,scp", 0);
+ if (!scp_node) {
+ dev_err(dev, "can't get SCP node\n");
+ return NULL;
+ }
+
+ scp_pdev = of_find_device_by_node(scp_node);
+ if (WARN_ON(!scp_pdev)) {
+ dev_err(dev, "SCP pdev failed\n");
+ of_node_put(scp_node);
+ return NULL;
+ }
+
+ return scp_pdev;
+}
+EXPORT_SYMBOL_GPL(scp_get_pdev);
+
+static void scp_wdt_handler(struct mtk_scp *scp)
+{
+ rproc_report_crash(scp->rproc, RPROC_WATCHDOG);
+}
+
+static void scp_init_ipi_handler(void *data, unsigned int len, void *priv)
+{
+ struct mtk_scp *scp = (struct mtk_scp *)priv;
+ struct scp_run *run = (struct scp_run *)data;
+
+ scp->run.signaled = run->signaled;
+ strncpy(scp->run.fw_ver, run->fw_ver, SCP_FW_VER_LEN);
+ scp->run.dec_capability = run->dec_capability;
+ scp->run.enc_capability = run->enc_capability;
+ wake_up_interruptible(&scp->run.wq);
+}
+
+static void scp_ipi_handler(struct mtk_scp *scp)
+{
+ struct share_obj *rcv_obj = scp->recv_buf;
+ struct scp_ipi_desc *ipi_desc = scp->ipi_desc;
+ u8 tmp_data[288];
+
+ if (rcv_obj->id >= SCP_IPI_MAX || !ipi_desc[rcv_obj->id].handler) {
+ dev_err(scp->dev, "No such ipi id = %d\n", rcv_obj->id);
+ return;
+ }
+
+ memcpy_fromio(tmp_data, &rcv_obj->share_buf, rcv_obj->len);
+ ipi_desc[rcv_obj->id].handler(tmp_data,
+ rcv_obj->len,
+ ipi_desc[rcv_obj->id].priv);
+ scp->ipi_id_ack[rcv_obj->id] = true;
+ wake_up(&scp->ack_wq);
+}
+
+static int scp_ipi_init(struct mtk_scp *scp)
+{
+ size_t send_offset = SCP_FW_END - sizeof(struct share_obj);
+ size_t recv_offset = send_offset - sizeof(struct share_obj);
+
+ /* Disable SCP to host interrupt */
+ writel(MT8183_SCP_IPC_INT_BIT, scp->reg_base + MT8183_SCP_TO_HOST);
+
+ /* shared buffer initialization */
+ scp->recv_buf = (__force struct share_obj *)(scp->sram_base +
+ recv_offset);
+ scp->send_buf = (__force struct share_obj *)(scp->sram_base +
+ send_offset);
+ memset_io(scp->recv_buf, 0, sizeof(scp->recv_buf));
+ memset_io(scp->send_buf, 0, sizeof(scp->send_buf));
+
+ return 0;
+}
+
+static void scp_reset_assert(const struct mtk_scp *scp)
+{
+ u32 val;
+
+ val = readl(scp->reg_base + MT8183_SW_RSTN);
+ val &= ~MT8183_SW_RSTN_BIT;
+ writel(val, scp->reg_base + MT8183_SW_RSTN);
+}
+
+static void scp_reset_deassert(const struct mtk_scp *scp)
+{
+ u32 val;
+
+ val = readl(scp->reg_base + MT8183_SW_RSTN);
+ val |= MT8183_SW_RSTN_BIT;
+ writel(val, scp->reg_base + MT8183_SW_RSTN);
+}
+
+static irqreturn_t scp_irq_handler(int irq, void *priv)
+{
+ struct mtk_scp *scp = priv;
+ u32 scp_to_host;
+ int ret;
+
+ ret = clk_prepare_enable(scp->clk);
+ if (ret) {
+ dev_err(scp->dev, "failed to enable clocks\n");
+ return IRQ_NONE;
+ }
+
+ scp_to_host = readl(scp->reg_base + MT8183_SCP_TO_HOST);
+ if (scp_to_host & MT8183_SCP_IPC_INT_BIT) {
+ scp_ipi_handler(scp);
+ } else {
+ dev_err(scp->dev, "SCP watchdog timeout! 0x%x", scp_to_host);
+ scp_wdt_handler(scp);
+ }
+
+ /*
+ * Ensure that all writes to SRAM are committed before another
+ * interrupt.
+ */
+ mb();
+ /* SCP won't send another interrupt until we set SCP_TO_HOST to 0. */
+ writel(MT8183_SCP_IPC_INT_BIT | MT8183_SCP_WDT_INT_BIT,
+ scp->reg_base + MT8183_SCP_TO_HOST);
+ clk_disable_unprepare(scp->clk);
+
+ return IRQ_HANDLED;
+}
+
+static int scp_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
+{
+ struct device *dev = &rproc->dev;
+ struct elf32_hdr *ehdr;
+ struct elf32_phdr *phdr;
+ int i, ret = 0;
+ const u8 *elf_data = fw->data;
+
+ ehdr = (struct elf32_hdr *)elf_data;
+ phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff);
+
+ /* go through the available ELF segments */
+ for (i = 0; i < ehdr->e_phnum; i++, phdr++) {
+ u32 da = phdr->p_paddr;
+ u32 memsz = phdr->p_memsz;
+ u32 filesz = phdr->p_filesz;
+ u32 offset = phdr->p_offset;
+ void __iomem *ptr;
+
+ if (phdr->p_type != PT_LOAD)
+ continue;
+
+ dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n",
+ phdr->p_type, da, memsz, filesz);
+
+ if (filesz > memsz) {
+ dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n",
+ filesz, memsz);
+ ret = -EINVAL;
+ break;
+ }
+
+ if (offset + filesz > fw->size) {
+ dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n",
+ offset + filesz, fw->size);
+ ret = -EINVAL;
+ break;
+ }
+
+ /* grab the kernel address for this device address */
+ ptr = rproc_da_to_va(rproc, da, memsz);
+ if (!ptr) {
+ dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz);
+ ret = -EINVAL;
+ break;
+ }
+
+ /* put the segment where the remote processor expects it */
+ if (phdr->p_filesz)
+ scp_memcpy_aligned(ptr, elf_data + phdr->p_offset,
+ filesz);
+ }
+
+ return ret;
+}
+
+static int scp_load(struct rproc *rproc, const struct firmware *fw)
+{
+ const struct mtk_scp *scp = rproc->priv;
+ struct device *dev = scp->dev;
+ int ret;
+
+ ret = clk_prepare_enable(scp->clk);
+ if (ret) {
+ dev_err(dev, "failed to enable clocks\n");
+ return ret;
+ }
+
+ /* Hold SCP in reset while loading FW. */
+ scp_reset_assert(scp);
+
+ /* Reset clocks before loading FW */
+ writel(0x0, scp->reg_base + MT8183_SCP_CLK_SW_SEL);
+ writel(0x0, scp->reg_base + MT8183_SCP_CLK_DIV_SEL);
+
+ /* Turn on the power of SCP's SRAM before using it. */
+ writel(0x0, scp->reg_base + MT8183_SCP_SRAM_PDN);
+ ret = scp_elf_load_segments(rproc, fw);
+ clk_disable_unprepare(scp->clk);
+
+ return ret;
+}
+
+static int scp_start(struct rproc *rproc)
+{
+ struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
+ struct device *dev = scp->dev;
+ struct scp_run *run;
+ int ret;
+
+ ret = clk_prepare_enable(scp->clk);
+ if (ret) {
+ dev_err(dev, "failed to enable clocks\n");
+ return ret;
+ }
+
+ run = &scp->run;
+ run->signaled = false;
+
+ scp_reset_deassert(scp);
+
+ ret = wait_event_interruptible_timeout(
+ run->wq,
+ run->signaled,
+ msecs_to_jiffies(2000));
+
+ if (ret == 0) {
+ dev_err(dev, "wait SCP initialization timeout!\n");
+ ret = -ETIME;
+ goto stop;
+ }
+ if (ret == -ERESTARTSYS) {
+ dev_err(dev, "wait SCP interrupted by a signal!\n");
+ goto stop;
+ }
+ clk_disable_unprepare(scp->clk);
+ dev_info(dev, "SCP is ready. FW version %s\n", run->fw_ver);
+
+ return 0;
+
+stop:
+ scp_reset_assert(scp);
+ clk_disable_unprepare(scp->clk);
+ return ret;
+}
+
+static void *scp_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+ struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
+ int offset;
+
+ if (da < scp->sram_size) {
+ offset = da;
+ if (offset >= 0 && ((offset + len) < scp->sram_size))
+ return (__force void *)(scp->sram_base + offset);
+ } else if (da >= scp->sram_size &&
+ da < (scp->sram_size + MAX_CODE_SIZE)) {
+ offset = da;
+ if (offset >= 0 && (offset + len) < MAX_CODE_SIZE)
+ return scp->cpu_addr + offset;
+ } else {
+ offset = da - scp->phys_addr;
+ if (offset >= 0 &&
+ (offset + len) < (scp->dram_size - MAX_CODE_SIZE))
+ return scp->cpu_addr + offset;
+ }
+
+ return NULL;
+}
+
+static int scp_stop(struct rproc *rproc)
+{
+ struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
+ int ret;
+
+ ret = clk_prepare_enable(scp->clk);
+ if (ret) {
+ dev_err(scp->dev, "failed to enable clocks\n");
+ return ret;
+ }
+
+ scp_reset_assert(scp);
+ clk_disable_unprepare(scp->clk);
+
+ return 0;
+}
+
+static const struct rproc_ops scp_ops = {
+ .start = scp_start,
+ .stop = scp_stop,
+ .load = scp_load,
+ .da_to_va = scp_da_to_va,
+};
+
+unsigned int scp_get_vdec_hw_capa(struct platform_device *pdev)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+
+ return scp->run.dec_capability;
+}
+EXPORT_SYMBOL_GPL(scp_get_vdec_hw_capa);
+
+unsigned int scp_get_venc_hw_capa(struct platform_device *pdev)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+
+ return scp->run.enc_capability;
+}
+EXPORT_SYMBOL_GPL(scp_get_venc_hw_capa);
+
+void *scp_mapping_dm_addr(struct platform_device *pdev, u32 mem_addr)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+ void *ptr;
+
+ ptr = scp_da_to_va(scp->rproc, mem_addr, 0);
+ if (!ptr)
+ return ERR_PTR(-EINVAL);
+
+ return ptr;
+}
+EXPORT_SYMBOL_GPL(scp_mapping_dm_addr);
+
+static int scp_map_memory_region(struct mtk_scp *scp)
+{
+ struct device_node *node;
+ struct resource r;
+ int ret;
+
+ node = of_parse_phandle(scp->dev->of_node, "memory-region", 0);
+ if (!node) {
+ dev_err(scp->dev, "no memory-region specified\n");
+ return -EINVAL;
+ }
+
+ ret = of_address_to_resource(node, 0, &r);
+ if (ret)
+ return ret;
+
+ scp->phys_addr = r.start;
+ scp->dram_size = resource_size(&r);
+ scp->cpu_addr =
+ devm_ioremap_wc(scp->dev, scp->phys_addr, scp->dram_size);
+
+ if (!scp->cpu_addr) {
+ dev_err(scp->dev, "unable to map memory region: %pa+%zx\n",
+ &r.start, scp->dram_size);
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static int scp_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct mtk_scp *scp;
+ struct rproc *rproc;
+ struct resource *res;
+ char *fw_name = "scp.img";
+ int ret;
+
+ rproc = rproc_alloc(dev,
+ np->name,
+ &scp_ops,
+ fw_name,
+ sizeof(*scp));
+ if (!rproc) {
+ dev_err(dev, "unable to allocate remoteproc\n");
+ return -ENOMEM;
+ }
+
+ scp = (struct mtk_scp *)rproc->priv;
+ scp->rproc = rproc;
+ scp->dev = dev;
+ platform_set_drvdata(pdev, scp);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
+ scp->sram_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR((__force void *)scp->sram_base)) {
+ dev_err(dev, "Failed to parse and map sram memory\n");
+ ret = PTR_ERR((__force void *)scp->sram_base);
+ goto free_rproc;
+ }
+ scp->sram_size = resource_size(res);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
+ scp->reg_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR((__force void *)scp->reg_base)) {
+ dev_err(dev, "Failed to parse and map cfg memory\n");
+ ret = PTR_ERR((__force void *)scp->reg_base);
+ goto free_rproc;
+ }
+
+ ret = scp_map_memory_region(scp);
+ if (ret)
+ goto free_rproc;
+
+ scp->clk = devm_clk_get(dev, "main");
+ if (IS_ERR(scp->clk)) {
+ dev_err(dev, "Failed to get clock\n");
+ ret = PTR_ERR(scp->clk);
+ goto free_rproc;
+ }
+
+ ret = clk_prepare_enable(scp->clk);
+ if (ret) {
+ dev_err(dev, "failed to enable clocks\n");
+ goto free_rproc;
+ }
+
+ ret = scp_ipi_init(scp);
+ clk_disable_unprepare(scp->clk);
+ if (ret) {
+ dev_err(dev, "Failed to init ipi\n");
+ goto free_rproc;
+ }
+
+ /* register SCP initialization IPI */
+ ret = scp_ipi_register(pdev,
+ SCP_IPI_INIT,
+ scp_init_ipi_handler,
+ scp);
+ if (ret) {
+ dev_err(dev, "Failed to register IPI_SCP_INIT\n");
+ goto free_rproc;
+ }
+
+ mutex_init(&scp->lock);
+
+ init_waitqueue_head(&scp->run.wq);
+ init_waitqueue_head(&scp->ack_wq);
+
+ ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0), NULL,
+ scp_irq_handler, IRQF_ONESHOT,
+ pdev->name, scp);
+
+ if (ret) {
+ dev_err(dev, "failed to request irq\n");
+ goto destroy_mutex;
+ }
+
+ ret = rproc_add(rproc);
+ if (ret)
+ goto destroy_mutex;
+
+ return ret;
+
+destroy_mutex:
+ mutex_destroy(&scp->lock);
+free_rproc:
+ rproc_free(rproc);
+
+ return ret;
+}
+
+static int scp_remove(struct platform_device *pdev)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+
+ rproc_del(scp->rproc);
+ rproc_free(scp->rproc);
+
+ return 0;
+}
+
+static const struct of_device_id mtk_scp_of_match[] = {
+ { .compatible = "mediatek,mt8183-scp"},
+ {},
+};
+MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
+
+static struct platform_driver mtk_scp_driver = {
+ .probe = scp_probe,
+ .remove = scp_remove,
+ .driver = {
+ .name = "mtk-scp",
+ .of_match_table = of_match_ptr(mtk_scp_of_match),
+ },
+};
+
+module_platform_driver(mtk_scp_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MediaTek SCP control driver");
diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c
new file mode 100644
index 000000000000..f5d271c0f623
--- /dev/null
+++ b/drivers/remoteproc/mtk_scp_ipi.c
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2018 MediaTek Inc.
+
+#include <asm/barrier.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_data/mtk_scp.h>
+#include <linux/platform_device.h>
+
+#include "mtk_common.h"
+
+int scp_ipi_register(struct platform_device *pdev,
+ enum scp_ipi_id id,
+ scp_ipi_handler_t handler,
+ void *priv)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+ struct scp_ipi_desc *ipi_desc;
+
+ if (!scp) {
+ dev_err(&pdev->dev, "scp device is not ready\n");
+ return -EPROBE_DEFER;
+ }
+
+ if (WARN_ON(id < 0) || WARN_ON(id >= SCP_IPI_MAX) ||
+ WARN_ON(handler == NULL))
+ return -EINVAL;
+
+ ipi_desc = scp->ipi_desc;
+ ipi_desc[id].handler = handler;
+ ipi_desc[id].priv = priv;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(scp_ipi_register);
+
+void scp_ipi_unregister(struct platform_device *pdev, enum scp_ipi_id id)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+ struct scp_ipi_desc *ipi_desc;
+
+ if (!scp)
+ return;
+
+ if (WARN_ON(id < 0) || WARN_ON(id >= SCP_IPI_MAX))
+ return;
+
+ ipi_desc = scp->ipi_desc;
+ ipi_desc[id].handler = NULL;
+ ipi_desc[id].priv = NULL;
+}
+EXPORT_SYMBOL_GPL(scp_ipi_unregister);
+
+/*
+ * Copy src to dst, where dst is in SCP SRAM region.
+ * Since AP access of SCP SRAM don't support byte write, this always write a
+ * full word at a time, and may cause some extra bytes to be written at the
+ * beginning & ending of dst.
+ */
+void scp_memcpy_aligned(void *dst, const void *src, unsigned int len)
+{
+ void *ptr;
+ u32 val;
+ unsigned int i = 0;
+
+ if (!IS_ALIGNED((unsigned long)dst, 4)) {
+ ptr = (void *)ALIGN_DOWN((unsigned long)dst, 4);
+ i = 4 - (dst - ptr);
+ val = readl_relaxed(ptr);
+ memcpy((u8 *)&val + (4 - i), src, i);
+ writel_relaxed(val, ptr);
+ }
+
+ while (i + 4 <= len) {
+ val = *((u32 *)(src + i));
+ writel_relaxed(val, dst + i);
+ i += 4;
+ }
+ if (i < len) {
+ val = readl_relaxed(dst + i);
+ memcpy(&val, src + i, len - i);
+ writel_relaxed(val, dst + i);
+ }
+}
+EXPORT_SYMBOL_GPL(scp_memcpy_aligned);
+
+int scp_ipi_send(struct platform_device *pdev,
+ enum scp_ipi_id id,
+ void *buf,
+ unsigned int len,
+ unsigned int wait)
+{
+ struct mtk_scp *scp = platform_get_drvdata(pdev);
+ struct share_obj *send_obj = scp->send_buf;
+ unsigned long timeout;
+ int ret;
+
+ if (WARN_ON(id <= SCP_IPI_INIT) || WARN_ON(id >= SCP_IPI_MAX) ||
+ WARN_ON(len > sizeof(send_obj->share_buf)) || WARN_ON(!buf))
+ return -EINVAL;
+
+ mutex_lock(&scp->lock);
+
+ ret = clk_prepare_enable(scp->clk);
+ if (ret) {
+ dev_err(scp->dev, "failed to enable clock\n");
+ return ret;
+ }
+
+ /* Wait until SCP receives the last command */
+ timeout = jiffies + msecs_to_jiffies(2000);
+ do {
+ if (time_after(jiffies, timeout)) {
+ dev_err(scp->dev, "%s: IPI timeout!\n", __func__);
+ ret = -EIO;
+ mutex_unlock(&scp->lock);
+ goto clock_disable;
+ }
+ } while (readl(scp->reg_base + MT8183_HOST_TO_SCP));
+
+ scp_memcpy_aligned(send_obj->share_buf, buf, len);
+
+ send_obj->len = len;
+ send_obj->id = id;
+
+ scp->ipi_id_ack[id] = false;
+ /*
+ * Ensure that all writes to SRAM are committed before sending the
+ * interrupt to SCP.
+ */
+ mb();
+ /* send the command to SCP */
+ writel(MT8183_HOST_IPC_INT_BIT, scp->reg_base + MT8183_HOST_TO_SCP);
+
+ mutex_unlock(&scp->lock);
+
+ if (wait) {
+ /* wait for SCP's ACK */
+ timeout = msecs_to_jiffies(wait);
+ ret = wait_event_timeout(scp->ack_wq,
+ scp->ipi_id_ack[id],
+ timeout);
+ scp->ipi_id_ack[id] = false;
+ if (WARN(!ret,
+ "scp ipi %d ack time out !", id))
+ ret = -EIO;
+ else
+ ret = 0;
+ }
+
+clock_disable:
+ clk_disable_unprepare(scp->clk);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(scp_ipi_send);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MediaTek scp IPI interface");
diff --git a/include/linux/platform_data/mtk_scp.h b/include/linux/platform_data/mtk_scp.h
new file mode 100644
index 000000000000..b81ac5c7d320
--- /dev/null
+++ b/include/linux/platform_data/mtk_scp.h
@@ -0,0 +1,141 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ */
+
+#ifndef _MTK_SCP_H
+#define _MTK_SCP_H
+
+#include <linux/platform_device.h>
+
+typedef void (*scp_ipi_handler_t) (void *data,
+ unsigned int len,
+ void *priv);
+
+/**
+ * enum ipi_id - the id of inter-processor interrupt
+ *
+ * @SCP_IPI_INIT: The interrupt from scp is to notfiy kernel
+ * SCP initialization completed.
+ * IPI_SCP_INIT is sent from SCP when firmware is
+ * loaded. AP doesn't need to send IPI_SCP_INIT
+ * command to SCP.
+ * For other IPI below, AP should send the request
+ * to SCP to trigger the interrupt.
+ * @SCP_IPI_MAX: The maximum IPI number
+ */
+
+enum scp_ipi_id {
+ SCP_IPI_INIT = 0,
+ SCP_IPI_VDEC_H264,
+ SCP_IPI_VDEC_VP8,
+ SCP_IPI_VDEC_VP9,
+ SCP_IPI_VENC_H264,
+ SCP_IPI_VENC_VP8,
+ SCP_IPI_MDP_INIT,
+ SCP_IPI_MDP_DEINIT,
+ SCP_IPI_MDP_FRAME,
+ SCP_IPI_DIP,
+ SCP_IPI_ISP_CMD,
+ SCP_IPI_ISP_FRAME,
+ SCP_IPI_FD_CMD,
+ SCP_IPI_CROS_HOST_CMD,
+ SCP_IPI_MAX,
+};
+
+/**
+ * scp_ipi_register - register an ipi function
+ *
+ * @pdev: SCP platform device
+ * @id: IPI ID
+ * @handler: IPI handler
+ * @priv: private data for IPI handler
+ *
+ * Register an ipi function to receive ipi interrupt from SCP.
+ *
+ * Return: Return 0 if ipi registers successfully, otherwise it is failed.
+ */
+int scp_ipi_register(struct platform_device *pdev,
+ enum scp_ipi_id id,
+ scp_ipi_handler_t handler,
+ void *priv);
+
+/**
+ * scp_ipi_unregister - unregister an ipi function
+ *
+ * @pdev: SCP platform device
+ * @id: IPI ID
+ *
+ * Unregister an ipi function to receive ipi interrupt from SCP.
+ */
+void scp_ipi_unregister(struct platform_device *pdev, enum scp_ipi_id id);
+
+/**
+ * scp_ipi_send - send data from AP to scp.
+ *
+ * @pdev: SCP platform device
+ * @id: IPI ID
+ * @buf: the data buffer
+ * @len: the data buffer length
+ * @wait: 1: need ack
+ *
+ * This function is thread-safe. When this function returns,
+ * SCP has received the data and starts the processing.
+ * When the processing completes, IPI handler registered
+ * by scp_ipi_register will be called in interrupt context.
+ *
+ * Return: Return 0 if sending data successfully, otherwise it is failed.
+ **/
+int scp_ipi_send(struct platform_device *pdev,
+ enum scp_ipi_id id,
+ void *buf,
+ unsigned int len,
+ unsigned int wait);
+
+/**
+ * scp_get_pdev - get SCP's platform device
+ *
+ * @pdev: the platform device of the module requesting SCP platform
+ * device for using SCP API.
+ *
+ * Return: Return NULL if it is failed.
+ * otherwise it is SCP's platform device
+ **/
+struct platform_device *scp_get_pdev(struct platform_device *pdev);
+
+/**
+ * scp_get_vdec_hw_capa - get video decoder hardware capability
+ *
+ * @pdev: SCP platform device
+ *
+ * Return: video decoder hardware capability
+ **/
+unsigned int scp_get_vdec_hw_capa(struct platform_device *pdev);
+
+/**
+ * scp_get_venc_hw_capa - get video encoder hardware capability
+ *
+ * @pdev: SCP platform device
+ *
+ * Return: video encoder hardware capability
+ **/
+unsigned int scp_get_venc_hw_capa(struct platform_device *pdev);
+
+/**
+ * scp_mapping_dm_addr - Mapping SRAM/DRAM to kernel virtual address
+ *
+ * @pdev: SCP platform device
+ * @mem_addr: SCP views memory address
+ *
+ * Mapping the SCP's SRAM address /
+ * DMEM (Data Extended Memory) memory address /
+ * Working buffer memory address to
+ * kernel virtual address.
+ *
+ * Return: Return ERR_PTR(-EINVAL) if mapping failed,
+ * otherwise the mapped kernel virtual address
+ **/
+void *scp_mapping_dm_addr(struct platform_device *pdev,
+ u32 mem_addr);
+
+#endif /* _MTK_SCP_H */
--
2.22.0.rc2.383.gf4fbbf30c2-goog
From: Erin Lo <[email protected]>
Add a DT binding documentation of SCP for the
MT8183 SoC from Mediatek.
Signed-off-by: Erin Lo <[email protected]>
Signed-off-by: Pi-Hsun Shih <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
---
Changes from v10, v9, v8, v7, v6:
- No change.
Changes from v5:
- Remove dependency on CONFIG_RPMSG_MTK_SCP.
Changes from v4:
- Add detail of more properties.
- Document the usage of mtk,rpmsg-name in subnode from the new design.
Changes from v3:
- No change.
Changes from v2:
- No change. I realized that for this patch series, there's no need to
add anything under the mt8183-scp node (neither the mt8183-rpmsg or
the cros-ec-rpmsg) for them to work, since mt8183-rpmsg is added
directly as a rproc_subdev by code, and cros-ec-rpmsg is dynamically
created by SCP name service.
Changes from v1:
- No change.
---
.../bindings/remoteproc/mtk,scp.txt | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
new file mode 100644
index 000000000000..3ba668bab14b
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
@@ -0,0 +1,36 @@
+Mediatek SCP Bindings
+----------------------------------------
+
+This binding provides support for ARM Cortex M4 Co-processor found on some
+Mediatek SoCs.
+
+Required properties:
+- compatible Should be "mediatek,mt8183-scp"
+- reg Should contain the address ranges for the two memory
+ regions, SRAM and CFG.
+- reg-names Contains the corresponding names for the two memory
+ regions. These should be named "sram" & "cfg".
+- clocks Clock for co-processor (See: ../clock/clock-bindings.txt)
+- clock-names Contains the corresponding name for the clock. This
+ should be named "main".
+
+Subnodes
+--------
+
+Subnodes of the SCP represent rpmsg devices. The names of the devices are not
+important. The properties of these nodes are defined by the individual bindings
+for the rpmsg devices - but must contain the following property:
+
+- mtk,rpmsg-name Contains the name for the rpmsg device. Used to match
+ the subnode to rpmsg device announced by SCP.
+
+Example:
+
+ scp: scp@10500000 {
+ compatible = "mediatek,mt8183-scp";
+ reg = <0 0x10500000 0 0x80000>,
+ <0 0x105c0000 0 0x5000>;
+ reg-names = "sram", "cfg";
+ clocks = <&infracfg CLK_INFRA_SCPSYS>;
+ clock-names = "main";
+ };
--
2.22.0.rc2.383.gf4fbbf30c2-goog
From: Erin Lo <[email protected]>
Add memory table mapping API for other driver to lookup
reserved physical and virtual memory
Signed-off-by: Erin Lo <[email protected]>
Signed-off-by: Pi-Hsun Shih <[email protected]>
---
Changes from v10:
- Fix some type mismatch warnings when printing debug messages.
Changes from v9:
- No change.
Changes from v8:
- Add more reserved regions for camera ISP.
Changes from v7, v6, v5:
- No change.
Changes from v4:
- New patch.
---
drivers/remoteproc/mtk_scp.c | 136 ++++++++++++++++++++++++++
include/linux/platform_data/mtk_scp.h | 24 +++++
2 files changed, 160 insertions(+)
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index d98cf385b055..fd56c32da29a 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -352,6 +352,138 @@ void *scp_mapping_dm_addr(struct platform_device *pdev, u32 mem_addr)
}
EXPORT_SYMBOL_GPL(scp_mapping_dm_addr);
+#if SCP_RESERVED_MEM
+phys_addr_t scp_mem_base_phys;
+phys_addr_t scp_mem_base_virt;
+phys_addr_t scp_mem_size;
+
+static struct scp_reserve_mblock scp_reserve_mblock[] = {
+ {
+ .num = SCP_ISP_MEM_ID,
+ .start_phys = 0x0,
+ .start_virt = 0x0,
+ .size = 0x200000, /*2MB*/
+ },
+ {
+ .num = SCP_ISP_MEM2_ID,
+ .start_phys = 0x0,
+ .start_virt = 0x0,
+ .size = 0x800000, /*8MB*/
+ },
+ {
+ .num = SCP_DIP_MEM_ID,
+ .start_phys = 0x0,
+ .start_virt = 0x0,
+ .size = 0x900000, /*9MB*/
+ },
+ {
+ .num = SCP_MDP_MEM_ID,
+ .start_phys = 0x0,
+ .start_virt = 0x0,
+ .size = 0x600000, /*6MB*/
+ },
+ {
+ .num = SCP_FD_MEM_ID,
+ .start_phys = 0x0,
+ .start_virt = 0x0,
+ .size = 0x100000, /*1MB*/
+ },
+};
+
+static int scp_reserve_mem_init(struct mtk_scp *scp)
+{
+ enum scp_reserve_mem_id_t id;
+ phys_addr_t accumlate_memory_size = 0;
+
+ scp_mem_base_phys = (phys_addr_t) (scp->phys_addr + MAX_CODE_SIZE);
+ scp_mem_size = (phys_addr_t) (scp->dram_size - MAX_CODE_SIZE);
+
+ dev_info(scp->dev,
+ "phys:0x%llx - 0x%llx (0x%llx)\n",
+ (unsigned long long)scp_mem_base_phys,
+ (unsigned long long)(scp_mem_base_phys + scp_mem_size),
+ (unsigned long long)scp_mem_size);
+ accumlate_memory_size = 0;
+ for (id = 0; id < SCP_NUMS_MEM_ID; id++) {
+ scp_reserve_mblock[id].start_phys =
+ scp_mem_base_phys + accumlate_memory_size;
+ accumlate_memory_size += scp_reserve_mblock[id].size;
+ dev_info(scp->dev,
+ "[reserve_mem:%d]: phys:0x%llx - 0x%llx (0x%llx)\n",
+ id,
+ (unsigned long long)scp_reserve_mblock[id].start_phys,
+ (unsigned long long)(scp_reserve_mblock[id].start_phys +
+ scp_reserve_mblock[id].size),
+ (unsigned long long)scp_reserve_mblock[id].size);
+ }
+ return 0;
+}
+
+static int scp_reserve_memory_ioremap(struct mtk_scp *scp)
+{
+ enum scp_reserve_mem_id_t id;
+ phys_addr_t accumlate_memory_size = 0;
+
+ scp_mem_base_virt = (phys_addr_t)(size_t)ioremap_wc(scp_mem_base_phys,
+ scp_mem_size);
+
+ dev_info(scp->dev,
+ "virt:0x%llx - 0x%llx (0x%llx)\n",
+ (unsigned long long)scp_mem_base_virt,
+ (unsigned long long)(scp_mem_base_virt + scp_mem_size),
+ (unsigned long long)scp_mem_size);
+ for (id = 0; id < SCP_NUMS_MEM_ID; id++) {
+ scp_reserve_mblock[id].start_virt =
+ scp_mem_base_virt + accumlate_memory_size;
+ accumlate_memory_size += scp_reserve_mblock[id].size;
+ }
+ /* the reserved memory should be larger then expected memory
+ * or scp_reserve_mblock does not match dts
+ */
+ WARN_ON(accumlate_memory_size > scp_mem_size);
+#ifdef DEBUG
+ for (id = 0; id < NUMS_MEM_ID; id++) {
+ dev_info(scp->dev,
+ "[mem_reserve-%d] phys:0x%llx,virt:0x%llx,size:0x%llx\n",
+ id,
+ scp_get_reserve_mem_phys(id),
+ scp_get_reserve_mem_virt(id),
+ scp_get_reserve_mem_size(id));
+ }
+#endif
+ return 0;
+}
+phys_addr_t scp_get_reserve_mem_phys(enum scp_reserve_mem_id_t id)
+{
+ if (id >= SCP_NUMS_MEM_ID) {
+ pr_err("[SCP] no reserve memory for %d", id);
+ return 0;
+ } else
+ return scp_reserve_mblock[id].start_phys;
+}
+EXPORT_SYMBOL_GPL(scp_get_reserve_mem_phys);
+
+phys_addr_t scp_get_reserve_mem_virt(enum scp_reserve_mem_id_t id)
+{
+ if (id >= SCP_NUMS_MEM_ID) {
+ pr_err("[SCP] no reserve memory for %d", id);
+ return 0;
+ } else
+ return scp_reserve_mblock[id].start_virt;
+}
+EXPORT_SYMBOL_GPL(scp_get_reserve_mem_virt);
+
+phys_addr_t scp_get_reserve_mem_size(enum scp_reserve_mem_id_t id)
+{
+ if (id >= SCP_NUMS_MEM_ID) {
+ pr_err("[SCP] no reserve memory for %d", id);
+ return 0;
+ } else
+ return scp_reserve_mblock[id].size;
+}
+EXPORT_SYMBOL_GPL(scp_get_reserve_mem_size);
+#endif
+
static int scp_map_memory_region(struct mtk_scp *scp)
{
struct device_node *node;
@@ -379,6 +511,10 @@ static int scp_map_memory_region(struct mtk_scp *scp)
return -EBUSY;
}
+#if SCP_RESERVED_MEM
+ scp_reserve_mem_init(scp);
+ scp_reserve_memory_ioremap(scp);
+#endif
return 0;
}
diff --git a/include/linux/platform_data/mtk_scp.h b/include/linux/platform_data/mtk_scp.h
index b81ac5c7d320..96e56fdd0917 100644
--- a/include/linux/platform_data/mtk_scp.h
+++ b/include/linux/platform_data/mtk_scp.h
@@ -138,4 +138,28 @@ unsigned int scp_get_venc_hw_capa(struct platform_device *pdev);
void *scp_mapping_dm_addr(struct platform_device *pdev,
u32 mem_addr);
+#define SCP_RESERVED_MEM (1)
+#if SCP_RESERVED_MEM
+/* scp reserve memory ID definition*/
+enum scp_reserve_mem_id_t {
+ SCP_ISP_MEM_ID,
+ SCP_ISP_MEM2_ID,
+ SCP_MDP_MEM_ID,
+ SCP_DIP_MEM_ID,
+ SCP_FD_MEM_ID,
+ SCP_NUMS_MEM_ID,
+};
+
+struct scp_reserve_mblock {
+ enum scp_reserve_mem_id_t num;
+ u64 start_phys;
+ u64 start_virt;
+ u64 size;
+};
+
+extern phys_addr_t scp_get_reserve_mem_phys(enum scp_reserve_mem_id_t id);
+extern phys_addr_t scp_get_reserve_mem_virt(enum scp_reserve_mem_id_t id);
+extern phys_addr_t scp_get_reserve_mem_size(enum scp_reserve_mem_id_t id);
+#endif
+
#endif /* _MTK_SCP_H */
--
2.22.0.rc2.383.gf4fbbf30c2-goog