by Tomi Valkeinen

[permalink] [raw]

Subject: [PATCH v12 6/8] media: i2c: add DS90UB960 driver

Add driver for TI DS90UB960 FPD-Link III Deserializer.

Signed-off-by: Tomi Valkeinen <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
---
MAINTAINERS | 8 +
drivers/media/i2c/Kconfig | 21 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/ds90ub960.c | 4049 +++++++++++++++++++++++++++++++++
include/media/i2c/ds90ub9xx.h | 22 +
5 files changed, 4101 insertions(+)
create mode 100644 drivers/media/i2c/ds90ub960.c
create mode 100644 include/media/i2c/ds90ub9xx.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 348bc924a56f..22e8d1bf148e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20929,6 +20929,14 @@ F: drivers/misc/tifm*
F: drivers/mmc/host/tifm_sd.c
F: include/linux/tifm.h

+TI FPD-LINK DRIVERS
+M: Tomi Valkeinen <[email protected]>
+L: [email protected]
+S: Maintained
+F: Documentation/devicetree/bindings/media/i2c/ti,ds90*
+F: drivers/media/i2c/ds90*
+F: include/media/i2c/ds90*
+
TI KEYSTONE MULTICORE NAVIGATOR DRIVERS
M: Nishanth Menon <[email protected]>
M: Santosh Shilimkar <[email protected]>
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 256d55bb2b1d..80de6c3a6492 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -1611,4 +1611,25 @@ config VIDEO_THS7303

endmenu

+#
+# Video serializers and deserializers (e.g. FPD-Link)
+#
+
+menu "Video serializers and deserializers"
+
+config VIDEO_DS90UB960
+ tristate "TI FPD-Link III/IV Deserializers"
+ depends on OF && I2C && VIDEO_DEV
+ select I2C_ATR
+ select MEDIA_CONTROLLER
+ select OF_GPIO
+ select REGMAP_I2C
+ select V4L2_FWNODE
+ select VIDEO_V4L2_SUBDEV_API
+ help
+ Device driver for the Texas Instruments DS90UB960
+ FPD-Link III Deserializer and DS90UB9702 FPD-Link IV Deserializer.
+
+endmenu
+
endif # VIDEO_DEV
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index b44dacf935f4..4458df54db64 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_VIDEO_CS3308) += cs3308.o
obj-$(CONFIG_VIDEO_CS5345) += cs5345.o
obj-$(CONFIG_VIDEO_CS53L32A) += cs53l32a.o
obj-$(CONFIG_VIDEO_CX25840) += cx25840/
+obj-$(CONFIG_VIDEO_DS90UB960) += ds90ub960.o
obj-$(CONFIG_VIDEO_DW9714) += dw9714.o
obj-$(CONFIG_VIDEO_DW9768) += dw9768.o
obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o
diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
new file mode 100644
index 000000000000..ff939300c918
--- /dev/null
+++ b/drivers/media/i2c/ds90ub960.c
@@ -0,0 +1,4049 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the Texas Instruments DS90UB960-Q1 video deserializer
+ *
+ * Copyright (c) 2019 Luca Ceresoli <[email protected]>
+ * Copyright (c) 2023 Tomi Valkeinen <[email protected]>
+ */
+
+/*
+ * (Possible) TODOs:
+ *
+ * - PM for serializer and remote peripherals. We need to manage:
+ * - VPOC
+ * - Power domain? Regulator? Somehow any remote device should be able to
+ * cause the VPOC to be turned on.
+ * - Link between the deserializer and the serializer
+ * - Related to VPOC management. We probably always want to turn on the VPOC
+ * and then enable the link.
+ * - Serializer's services: i2c, gpios, power
+ * - The serializer needs to resume before the remote peripherals can
+ * e.g. use the i2c.
+ * - How to handle gpios? Reserving a gpio essentially keeps the provider
+ * (serializer) always powered on.
+ * - Do we need a new bus for the FPD-Link? At the moment the serializers
+ * are children of the same i2c-adapter where the deserializer resides.
+ * - i2c-atr could be made embeddable instead of allocatable.
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/fwnode.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c-atr.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+#include <media/i2c/ds90ub9xx.h>
+#include <media/mipi-csi2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define MHZ(v) ((u32)((v) * 1000000U))
+
+#define UB960_POLL_TIME_MS 500
+
+#define UB960_MAX_RX_NPORTS 4
+#define UB960_MAX_TX_NPORTS 2
+#define UB960_MAX_NPORTS (UB960_MAX_RX_NPORTS + UB960_MAX_TX_NPORTS)
+
+#define UB960_MAX_PORT_ALIASES 8
+
+#define UB960_NUM_BC_GPIOS 4
+
+/*
+ * Register map
+ *
+ * 0x00-0x32 Shared (UB960_SR)
+ * 0x33-0x3a CSI-2 TX (per-port paged on DS90UB960, shared on 954) (UB960_TR)
+ * 0x4c Shared (UB960_SR)
+ * 0x4d-0x7f FPD-Link RX, per-port paged (UB960_RR)
+ * 0xb0-0xbf Shared (UB960_SR)
+ * 0xd0-0xdf FPD-Link RX, per-port paged (UB960_RR)
+ * 0xf0-0xf5 Shared (UB960_SR)
+ * 0xf8-0xfb Shared (UB960_SR)
+ * All others Reserved
+ *
+ * Register prefixes:
+ * UB960_SR_* = Shared register
+ * UB960_RR_* = FPD-Link RX, per-port paged register
+ * UB960_TR_* = CSI-2 TX, per-port paged register
+ * UB960_XR_* = Reserved register
+ * UB960_IR_* = Indirect register
+ */
+
+#define UB960_SR_I2C_DEV_ID 0x00
+#define UB960_SR_RESET 0x01
+#define UB960_SR_RESET_DIGITAL_RESET1 BIT(1)
+#define UB960_SR_RESET_DIGITAL_RESET0 BIT(0)
+#define UB960_SR_RESET_GPIO_LOCK_RELEASE BIT(5)
+
+#define UB960_SR_GEN_CONFIG 0x02
+#define UB960_SR_REV_MASK 0x03
+#define UB960_SR_DEVICE_STS 0x04
+#define UB960_SR_PAR_ERR_THOLD_HI 0x05
+#define UB960_SR_PAR_ERR_THOLD_LO 0x06
+#define UB960_SR_BCC_WDOG_CTL 0x07
+#define UB960_SR_I2C_CTL1 0x08
+#define UB960_SR_I2C_CTL2 0x09
+#define UB960_SR_SCL_HIGH_TIME 0x0a
+#define UB960_SR_SCL_LOW_TIME 0x0b
+#define UB960_SR_RX_PORT_CTL 0x0c
+#define UB960_SR_IO_CTL 0x0d
+#define UB960_SR_GPIO_PIN_STS 0x0e
+#define UB960_SR_GPIO_INPUT_CTL 0x0f
+#define UB960_SR_GPIO_PIN_CTL(n) (0x10 + (n)) /* n < UB960_NUM_GPIOS */
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_SEL 5
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_SRC_SHIFT 2
+#define UB960_SR_GPIO_PIN_CTL_GPIO_OUT_EN BIT(0)
+
+#define UB960_SR_FS_CTL 0x18
+#define UB960_SR_FS_HIGH_TIME_1 0x19
+#define UB960_SR_FS_HIGH_TIME_0 0x1a
+#define UB960_SR_FS_LOW_TIME_1 0x1b
+#define UB960_SR_FS_LOW_TIME_0 0x1c
+#define UB960_SR_MAX_FRM_HI 0x1d
+#define UB960_SR_MAX_FRM_LO 0x1e
+#define UB960_SR_CSI_PLL_CTL 0x1f
+
+#define UB960_SR_FWD_CTL1 0x20
+#define UB960_SR_FWD_CTL1_PORT_DIS(n) BIT((n) + 4)
+
+#define UB960_SR_FWD_CTL2 0x21
+#define UB960_SR_FWD_STS 0x22
+
+#define UB960_SR_INTERRUPT_CTL 0x23
+#define UB960_SR_INTERRUPT_CTL_INT_EN BIT(7)
+#define UB960_SR_INTERRUPT_CTL_IE_CSI_TX0 BIT(4)
+#define UB960_SR_INTERRUPT_CTL_IE_RX(n) BIT((n)) /* rxport[n] IRQ */
+
+#define UB960_SR_INTERRUPT_STS 0x24
+#define UB960_SR_INTERRUPT_STS_INT BIT(7)
+#define UB960_SR_INTERRUPT_STS_IS_CSI_TX(n) BIT(4 + (n)) /* txport[n] IRQ */
+#define UB960_SR_INTERRUPT_STS_IS_RX(n) BIT((n)) /* rxport[n] IRQ */
+
+#define UB960_SR_TS_CONFIG 0x25
+#define UB960_SR_TS_CONTROL 0x26
+#define UB960_SR_TS_LINE_HI 0x27
+#define UB960_SR_TS_LINE_LO 0x28
+#define UB960_SR_TS_STATUS 0x29
+#define UB960_SR_TIMESTAMP_P0_HI 0x2a
+#define UB960_SR_TIMESTAMP_P0_LO 0x2b
+#define UB960_SR_TIMESTAMP_P1_HI 0x2c
+#define UB960_SR_TIMESTAMP_P1_LO 0x2d
+
+#define UB960_SR_CSI_PORT_SEL 0x32
+
+#define UB960_TR_CSI_CTL 0x33
+#define UB960_TR_CSI_CTL_CSI_CAL_EN BIT(6)
+#define UB960_TR_CSI_CTL_CSI_ENABLE BIT(0)
+
+#define UB960_TR_CSI_CTL2 0x34
+#define UB960_TR_CSI_STS 0x35
+#define UB960_TR_CSI_TX_ICR 0x36
+
+#define UB960_TR_CSI_TX_ISR 0x37
+#define UB960_TR_CSI_TX_ISR_IS_CSI_SYNC_ERROR BIT(3)
+#define UB960_TR_CSI_TX_ISR_IS_CSI_PASS_ERROR BIT(1)
+
+#define UB960_TR_CSI_TEST_CTL 0x38
+#define UB960_TR_CSI_TEST_PATT_HI 0x39
+#define UB960_TR_CSI_TEST_PATT_LO 0x3a
+
+#define UB960_XR_SFILTER_CFG 0x41
+#define UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT 4
+#define UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT 0
+
+#define UB960_XR_AEQ_CTL1 0x42
+#define UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_FPD_CLK BIT(6)
+#define UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_ENCODING BIT(5)
+#define UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_PARITY BIT(4)
+#define UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_MASK \
+ (UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_FPD_CLK | \
+ UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_ENCODING | \
+ UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_PARITY)
+#define UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN BIT(0)
+
+#define UB960_XR_AEQ_ERR_THOLD 0x43
+
+#define UB960_RR_BCC_ERR_CTL 0x46
+#define UB960_RR_BCC_STATUS 0x47
+#define UB960_RR_BCC_STATUS_SEQ_ERROR BIT(5)
+#define UB960_RR_BCC_STATUS_MASTER_ERR BIT(4)
+#define UB960_RR_BCC_STATUS_MASTER_TO BIT(3)
+#define UB960_RR_BCC_STATUS_SLAVE_ERR BIT(2)
+#define UB960_RR_BCC_STATUS_SLAVE_TO BIT(1)
+#define UB960_RR_BCC_STATUS_RESP_ERR BIT(0)
+#define UB960_RR_BCC_STATUS_ERROR_MASK \
+ (UB960_RR_BCC_STATUS_SEQ_ERROR | UB960_RR_BCC_STATUS_MASTER_ERR | \
+ UB960_RR_BCC_STATUS_MASTER_TO | UB960_RR_BCC_STATUS_SLAVE_ERR | \
+ UB960_RR_BCC_STATUS_SLAVE_TO | UB960_RR_BCC_STATUS_RESP_ERR)
+
+#define UB960_RR_FPD3_CAP 0x4a
+#define UB960_RR_RAW_EMBED_DTYPE 0x4b
+#define UB960_RR_RAW_EMBED_DTYPE_LINES_SHIFT 6
+
+#define UB960_SR_FPD3_PORT_SEL 0x4c
+
+#define UB960_RR_RX_PORT_STS1 0x4d
+#define UB960_RR_RX_PORT_STS1_BCC_CRC_ERROR BIT(5)
+#define UB960_RR_RX_PORT_STS1_LOCK_STS_CHG BIT(4)
+#define UB960_RR_RX_PORT_STS1_BCC_SEQ_ERROR BIT(3)
+#define UB960_RR_RX_PORT_STS1_PARITY_ERROR BIT(2)
+#define UB960_RR_RX_PORT_STS1_PORT_PASS BIT(1)
+#define UB960_RR_RX_PORT_STS1_LOCK_STS BIT(0)
+#define UB960_RR_RX_PORT_STS1_ERROR_MASK \
+ (UB960_RR_RX_PORT_STS1_BCC_CRC_ERROR | \
+ UB960_RR_RX_PORT_STS1_BCC_SEQ_ERROR | \
+ UB960_RR_RX_PORT_STS1_PARITY_ERROR)
+
+#define UB960_RR_RX_PORT_STS2 0x4e
+#define UB960_RR_RX_PORT_STS2_LINE_LEN_UNSTABLE BIT(7)
+#define UB960_RR_RX_PORT_STS2_LINE_LEN_CHG BIT(6)
+#define UB960_RR_RX_PORT_STS2_FPD3_ENCODE_ERROR BIT(5)
+#define UB960_RR_RX_PORT_STS2_BUFFER_ERROR BIT(4)
+#define UB960_RR_RX_PORT_STS2_CSI_ERROR BIT(3)
+#define UB960_RR_RX_PORT_STS2_FREQ_STABLE BIT(2)
+#define UB960_RR_RX_PORT_STS2_CABLE_FAULT BIT(1)
+#define UB960_RR_RX_PORT_STS2_LINE_CNT_CHG BIT(0)
+#define UB960_RR_RX_PORT_STS2_ERROR_MASK \
+ UB960_RR_RX_PORT_STS2_BUFFER_ERROR
+
+#define UB960_RR_RX_FREQ_HIGH 0x4f
+#define UB960_RR_RX_FREQ_LOW 0x50
+#define UB960_RR_SENSOR_STS_0 0x51
+#define UB960_RR_SENSOR_STS_1 0x52
+#define UB960_RR_SENSOR_STS_2 0x53
+#define UB960_RR_SENSOR_STS_3 0x54
+#define UB960_RR_RX_PAR_ERR_HI 0x55
+#define UB960_RR_RX_PAR_ERR_LO 0x56
+#define UB960_RR_BIST_ERR_COUNT 0x57
+
+#define UB960_RR_BCC_CONFIG 0x58
+#define UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH BIT(6)
+#define UB960_RR_BCC_CONFIG_BC_FREQ_SEL_MASK GENMASK(2, 0)
+
+#define UB960_RR_DATAPATH_CTL1 0x59
+#define UB960_RR_DATAPATH_CTL2 0x5a
+#define UB960_RR_SER_ID 0x5b
+#define UB960_RR_SER_ALIAS_ID 0x5c
+
+/* For these two register sets: n < UB960_MAX_PORT_ALIASES */
+#define UB960_RR_SLAVE_ID(n) (0x5d + (n))
+#define UB960_RR_SLAVE_ALIAS(n) (0x65 + (n))
+
+#define UB960_RR_PORT_CONFIG 0x6d
+#define UB960_RR_PORT_CONFIG_FPD3_MODE_MASK GENMASK(1, 0)
+
+#define UB960_RR_BC_GPIO_CTL(n) (0x6e + (n)) /* n < 2 */
+#define UB960_RR_RAW10_ID 0x70
+#define UB960_RR_RAW10_ID_VC_SHIFT 6
+#define UB960_RR_RAW10_ID_DT_SHIFT 0
+
+#define UB960_RR_RAW12_ID 0x71
+#define UB960_RR_CSI_VC_MAP 0x72
+#define UB960_RR_CSI_VC_MAP_SHIFT(x) ((x) * 2)
+
+#define UB960_RR_LINE_COUNT_HI 0x73
+#define UB960_RR_LINE_COUNT_LO 0x74
+#define UB960_RR_LINE_LEN_1 0x75
+#define UB960_RR_LINE_LEN_0 0x76
+#define UB960_RR_FREQ_DET_CTL 0x77
+#define UB960_RR_MAILBOX_1 0x78
+#define UB960_RR_MAILBOX_2 0x79
+
+#define UB960_RR_CSI_RX_STS 0x7a
+#define UB960_RR_CSI_RX_STS_LENGTH_ERR BIT(3)
+#define UB960_RR_CSI_RX_STS_CKSUM_ERR BIT(2)
+#define UB960_RR_CSI_RX_STS_ECC2_ERR BIT(1)
+#define UB960_RR_CSI_RX_STS_ECC1_ERR BIT(0)
+#define UB960_RR_CSI_RX_STS_ERROR_MASK \
+ (UB960_RR_CSI_RX_STS_LENGTH_ERR | UB960_RR_CSI_RX_STS_CKSUM_ERR | \
+ UB960_RR_CSI_RX_STS_ECC2_ERR | UB960_RR_CSI_RX_STS_ECC1_ERR)
+
+#define UB960_RR_CSI_ERR_COUNTER 0x7b
+#define UB960_RR_PORT_CONFIG2 0x7c
+#define UB960_RR_PORT_CONFIG2_RAW10_8BIT_CTL_MASK GENMASK(7, 6)
+#define UB960_RR_PORT_CONFIG2_RAW10_8BIT_CTL_SHIFT 6
+
+#define UB960_RR_PORT_CONFIG2_LV_POL_LOW BIT(1)
+#define UB960_RR_PORT_CONFIG2_FV_POL_LOW BIT(0)
+
+#define UB960_RR_PORT_PASS_CTL 0x7d
+#define UB960_RR_SEN_INT_RISE_CTL 0x7e
+#define UB960_RR_SEN_INT_FALL_CTL 0x7f
+
+#define UB960_SR_CSI_FRAME_COUNT_HI(n) (0x90 + 8 * (n))
+#define UB960_SR_CSI_FRAME_COUNT_LO(n) (0x91 + 8 * (n))
+#define UB960_SR_CSI_FRAME_ERR_COUNT_HI(n) (0x92 + 8 * (n))
+#define UB960_SR_CSI_FRAME_ERR_COUNT_LO(n) (0x93 + 8 * (n))
+#define UB960_SR_CSI_LINE_COUNT_HI(n) (0x94 + 8 * (n))
+#define UB960_SR_CSI_LINE_COUNT_LO(n) (0x95 + 8 * (n))
+#define UB960_SR_CSI_LINE_ERR_COUNT_HI(n) (0x96 + 8 * (n))
+#define UB960_SR_CSI_LINE_ERR_COUNT_LO(n) (0x97 + 8 * (n))
+
+#define UB960_XR_REFCLK_FREQ 0xa5 /* UB960 */
+
+#define UB960_RR_VC_ID_MAP(x) (0xa0 + (x)) /* UB9702 */
+
+#define UB960_SR_IND_ACC_CTL 0xb0
+#define UB960_SR_IND_ACC_CTL_IA_AUTO_INC BIT(1)
+
+#define UB960_SR_IND_ACC_ADDR 0xb1
+#define UB960_SR_IND_ACC_DATA 0xb2
+#define UB960_SR_BIST_CONTROL 0xb3
+#define UB960_SR_MODE_IDX_STS 0xb8
+#define UB960_SR_LINK_ERROR_COUNT 0xb9
+#define UB960_SR_FPD3_ENC_CTL 0xba
+#define UB960_SR_FV_MIN_TIME 0xbc
+#define UB960_SR_GPIO_PD_CTL 0xbe
+
+#define UB960_SR_FPD_RATE_CFG 0xc2 /* UB9702 */
+#define UB960_SR_CSI_PLL_DIV 0xc9 /* UB9702 */
+
+#define UB960_RR_PORT_DEBUG 0xd0
+#define UB960_RR_AEQ_CTL2 0xd2
+#define UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR BIT(2)
+
+#define UB960_RR_AEQ_STATUS 0xd3
+#define UB960_RR_AEQ_STATUS_STATUS_2 GENMASK(5, 3)
+#define UB960_RR_AEQ_STATUS_STATUS_1 GENMASK(2, 0)
+
+#define UB960_RR_AEQ_BYPASS 0xd4
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_SHIFT 5
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_MASK GENMASK(7, 5)
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_SHIFT 1
+#define UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_MASK GENMASK(3, 1)
+#define UB960_RR_AEQ_BYPASS_ENABLE BIT(0)
+
+#define UB960_RR_AEQ_MIN_MAX 0xd5
+#define UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT 4
+#define UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT 0
+
+#define UB960_RR_SFILTER_STS_0 0xd6
+#define UB960_RR_SFILTER_STS_1 0xd7
+#define UB960_RR_PORT_ICR_HI 0xd8
+#define UB960_RR_PORT_ICR_LO 0xd9
+#define UB960_RR_PORT_ISR_HI 0xda
+#define UB960_RR_PORT_ISR_LO 0xdb
+#define UB960_RR_FC_GPIO_STS 0xdc
+#define UB960_RR_FC_GPIO_ICR 0xdd
+#define UB960_RR_SEN_INT_RISE_STS 0xde
+#define UB960_RR_SEN_INT_FALL_STS 0xdf
+
+#define UB960_RR_CHANNEL_MODE 0xe4 /* UB9702 */
+
+#define UB960_SR_FPD3_RX_ID(n) (0xf0 + (n))
+#define UB960_SR_FPD3_RX_ID_LEN 6
+
+#define UB960_SR_I2C_RX_ID(n) (0xf8 + (n)) /* < UB960_FPD_RX_NPORTS */
+
+/* Indirect register blocks */
+#define UB960_IND_TARGET_PAT_GEN 0x00
+#define UB960_IND_TARGET_RX_ANA(n) (0x01 + (n))
+#define UB960_IND_TARGET_CSI_CSIPLL_REG_1 0x92 /* UB9702 */
+#define UB960_IND_TARGET_CSI_ANA 0x07
+
+/* UB960_IR_PGEN_*: Indirect Registers for Test Pattern Generator */
+
+#define UB960_IR_PGEN_CTL 0x01
+#define UB960_IR_PGEN_CTL_PGEN_ENABLE BIT(0)
+
+#define UB960_IR_PGEN_CFG 0x02
+#define UB960_IR_PGEN_CSI_DI 0x03
+#define UB960_IR_PGEN_LINE_SIZE1 0x04
+#define UB960_IR_PGEN_LINE_SIZE0 0x05
+#define UB960_IR_PGEN_BAR_SIZE1 0x06
+#define UB960_IR_PGEN_BAR_SIZE0 0x07
+#define UB960_IR_PGEN_ACT_LPF1 0x08
+#define UB960_IR_PGEN_ACT_LPF0 0x09
+#define UB960_IR_PGEN_TOT_LPF1 0x0a
+#define UB960_IR_PGEN_TOT_LPF0 0x0b
+#define UB960_IR_PGEN_LINE_PD1 0x0c
+#define UB960_IR_PGEN_LINE_PD0 0x0d
+#define UB960_IR_PGEN_VBP 0x0e
+#define UB960_IR_PGEN_VFP 0x0f
+#define UB960_IR_PGEN_COLOR(n) (0x10 + (n)) /* n < 15 */
+
+#define UB960_IR_RX_ANA_STROBE_SET_CLK 0x08
+#define UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY BIT(3)
+#define UB960_IR_RX_ANA_STROBE_SET_CLK_DELAY_MASK GENMASK(2, 0)
+
+#define UB960_IR_RX_ANA_STROBE_SET_DATA 0x09
+#define UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY BIT(3)
+#define UB960_IR_RX_ANA_STROBE_SET_DATA_DELAY_MASK GENMASK(2, 0)
+
+/* EQ related */
+
+#define UB960_MIN_AEQ_STROBE_POS -7
+#define UB960_MAX_AEQ_STROBE_POS 7
+
+#define UB960_MANUAL_STROBE_EXTRA_DELAY 6
+
+#define UB960_MIN_MANUAL_STROBE_POS -(7 + UB960_MANUAL_STROBE_EXTRA_DELAY)
+#define UB960_MAX_MANUAL_STROBE_POS (7 + UB960_MANUAL_STROBE_EXTRA_DELAY)
+#define UB960_NUM_MANUAL_STROBE_POS (UB960_MAX_MANUAL_STROBE_POS - UB960_MIN_MANUAL_STROBE_POS + 1)
+
+#define UB960_MIN_EQ_LEVEL 0
+#define UB960_MAX_EQ_LEVEL 14
+#define UB960_NUM_EQ_LEVELS (UB960_MAX_EQ_LEVEL - UB960_MIN_EQ_LEVEL + 1)
+
+struct ub960_hw_data {
+ const char *model;
+ u8 num_rxports;
+ u8 num_txports;
+ bool is_ub9702;
+ bool is_fpdlink4;
+};
+
+enum ub960_rxport_mode {
+ RXPORT_MODE_RAW10 = 0,
+ RXPORT_MODE_RAW12_HF = 1,
+ RXPORT_MODE_RAW12_LF = 2,
+ RXPORT_MODE_CSI2_SYNC = 3,
+ RXPORT_MODE_CSI2_ASYNC = 4,
+ RXPORT_MODE_LAST = RXPORT_MODE_CSI2_ASYNC,
+};
+
+enum ub960_rxport_cdr {
+ RXPORT_CDR_FPD3 = 0,
+ RXPORT_CDR_FPD4 = 1,
+ RXPORT_CDR_LAST = RXPORT_CDR_FPD4,
+};
+
+struct ub960_rxport {
+ struct ub960_data *priv;
+ u8 nport; /* RX port number, and index in priv->rxport[] */
+
+ struct {
+ struct v4l2_subdev *sd;
+ u16 pad;
+ struct fwnode_handle *ep_fwnode;
+ } source;
+
+ /* Serializer */
+ struct {
+ struct fwnode_handle *fwnode;
+ struct i2c_client *client;
+ unsigned short alias; /* I2C alias (lower 7 bits) */
+ struct ds90ub9xx_platform_data pdata;
+ } ser;
+
+ enum ub960_rxport_mode rx_mode;
+ enum ub960_rxport_cdr cdr_mode;
+
+ u8 lv_fv_pol; /* LV and FV polarities */
+
+ struct regulator *vpoc;
+
+ /* EQ settings */
+ struct {
+ bool manual_eq;
+
+ s8 strobe_pos;
+
+ union {
+ struct {
+ u8 eq_level_min;
+ u8 eq_level_max;
+ } aeq;
+
+ struct {
+ u8 eq_level;
+ } manual;
+ };
+ } eq;
+
+ const struct i2c_client *aliased_clients[UB960_MAX_PORT_ALIASES];
+};
+
+struct ub960_asd {
+ struct v4l2_async_subdev base;
+ struct ub960_rxport *rxport;
+};
+
+static inline struct ub960_asd *to_ub960_asd(struct v4l2_async_subdev *asd)
+{
+ return container_of(asd, struct ub960_asd, base);
+}
+
+struct ub960_txport {
+ struct ub960_data *priv;
+ u8 nport; /* TX port number, and index in priv->txport[] */
+
+ u32 num_data_lanes;
+};
+
+struct ub960_data {
+ const struct ub960_hw_data *hw_data;
+ struct i2c_client *client; /* for shared local registers */
+ struct regmap *regmap;
+
+ /* lock for register access */
+ struct mutex reg_lock;
+
+ struct clk *refclk;
+
+ struct regulator *vddio;
+
+ struct gpio_desc *pd_gpio;
+ struct delayed_work poll_work;
+ struct ub960_rxport *rxports[UB960_MAX_RX_NPORTS];
+ struct ub960_txport *txports[UB960_MAX_TX_NPORTS];
+
+ struct v4l2_subdev sd;
+ struct media_pad pads[UB960_MAX_NPORTS];
+
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct v4l2_async_notifier notifier;
+
+ u32 tx_data_rate; /* Nominal data rate (Gb/s) */
+ s64 tx_link_freq[1];
+
+ struct i2c_atr *atr;
+
+ struct {
+ u8 rxport;
+ u8 txport;
+ u8 indirect_target;
+ } reg_current;
+
+ bool streaming;
+
+ u8 stored_fwd_ctl;
+
+ u64 stream_enable_mask[UB960_MAX_NPORTS];
+
+ /* These are common to all ports */
+ struct {
+ bool manual;
+
+ s8 min;
+ s8 max;
+ } strobe;
+};
+
+static inline struct ub960_data *sd_to_ub960(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct ub960_data, sd);
+}
+
+static inline bool ub960_pad_is_sink(struct ub960_data *priv, u32 pad)
+{
+ return pad < priv->hw_data->num_rxports;
+}
+
+static inline bool ub960_pad_is_source(struct ub960_data *priv, u32 pad)
+{
+ return pad >= priv->hw_data->num_rxports;
+}
+
+static inline unsigned int ub960_pad_to_port(struct ub960_data *priv, u32 pad)
+{
+ if (ub960_pad_is_sink(priv, pad))
+ return pad;
+ else
+ return pad - priv->hw_data->num_rxports;
+}
+
+struct ub960_format_info {
+ u32 code;
+ u32 bpp;
+ u8 datatype;
+ bool meta;
+};
+
+static const struct ub960_format_info ub960_formats[] = {
+ { .code = MEDIA_BUS_FMT_YUYV8_1X16, .bpp = 16, .datatype = MIPI_CSI2_DT_YUV422_8B, },
+ { .code = MEDIA_BUS_FMT_UYVY8_1X16, .bpp = 16, .datatype = MIPI_CSI2_DT_YUV422_8B, },
+ { .code = MEDIA_BUS_FMT_VYUY8_1X16, .bpp = 16, .datatype = MIPI_CSI2_DT_YUV422_8B, },
+ { .code = MEDIA_BUS_FMT_YVYU8_1X16, .bpp = 16, .datatype = MIPI_CSI2_DT_YUV422_8B, },
+
+ { .code = MEDIA_BUS_FMT_SBGGR12_1X12, .bpp = 12, .datatype = MIPI_CSI2_DT_RAW12, },
+ { .code = MEDIA_BUS_FMT_SGBRG12_1X12, .bpp = 12, .datatype = MIPI_CSI2_DT_RAW12, },
+ { .code = MEDIA_BUS_FMT_SGRBG12_1X12, .bpp = 12, .datatype = MIPI_CSI2_DT_RAW12, },
+ { .code = MEDIA_BUS_FMT_SRGGB12_1X12, .bpp = 12, .datatype = MIPI_CSI2_DT_RAW12, },
+};
+
+static const struct ub960_format_info *ub960_find_format(u32 code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(ub960_formats); i++) {
+ if (ub960_formats[i].code == code)
+ return &ub960_formats[i];
+ }
+
+ return NULL;
+}
+
+/* -----------------------------------------------------------------------------
+ * Basic device access
+ */
+
+static int ub960_read(struct ub960_data *priv, u8 reg, u8 *val)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_read(priv->regmap, reg, &v);
+ if (ret) {
+ dev_err(dev, "%s: cannot read register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+ goto out_unlock;
+ }
+
+ *val = v;
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_write(struct ub960_data *priv, u8 reg, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_write(priv->regmap, reg, val);
+ if (ret)
+ dev_err(dev, "%s: cannot write register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_update_bits(struct ub960_data *priv, u8 reg, u8 mask, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_update_bits(priv->regmap, reg, mask, val);
+ if (ret)
+ dev_err(dev, "%s: cannot update register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_read16(struct ub960_data *priv, u8 reg, u16 *val)
+{
+ struct device *dev = &priv->client->dev;
+ __be16 __v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_bulk_read(priv->regmap, reg, &__v, sizeof(__v));
+ if (ret) {
+ dev_err(dev, "%s: cannot read register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+ goto out_unlock;
+ }
+
+ *val = be16_to_cpu(__v);
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_rxport_select(struct ub960_data *priv, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ lockdep_assert_held(&priv->reg_lock);
+
+ if (priv->reg_current.rxport == nport)
+ return 0;
+
+ ret = regmap_write(priv->regmap, UB960_SR_FPD3_PORT_SEL,
+ (nport << 4) | BIT(nport));
+ if (ret) {
+ dev_err(dev, "%s: cannot select rxport %d (%d)!\n", __func__,
+ nport, ret);
+ return ret;
+ }
+
+ priv->reg_current.rxport = nport;
+
+ return 0;
+}
+
+static int ub960_rxport_read(struct ub960_data *priv, u8 nport, u8 reg, u8 *val)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_rxport_select(priv, nport);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_read(priv->regmap, reg, &v);
+ if (ret) {
+ dev_err(dev, "%s: cannot read register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+ goto out_unlock;
+ }
+
+ *val = v;
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_rxport_write(struct ub960_data *priv, u8 nport, u8 reg, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_rxport_select(priv, nport);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_write(priv->regmap, reg, val);
+ if (ret)
+ dev_err(dev, "%s: cannot write register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_rxport_update_bits(struct ub960_data *priv, u8 nport, u8 reg,
+ u8 mask, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_rxport_select(priv, nport);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_update_bits(priv->regmap, reg, mask, val);
+ if (ret)
+ dev_err(dev, "%s: cannot update register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_rxport_read16(struct ub960_data *priv, u8 nport, u8 reg,
+ u16 *val)
+{
+ struct device *dev = &priv->client->dev;
+ __be16 __v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_rxport_select(priv, nport);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_bulk_read(priv->regmap, reg, &__v, sizeof(__v));
+ if (ret) {
+ dev_err(dev, "%s: cannot read register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+ goto out_unlock;
+ }
+
+ *val = be16_to_cpu(__v);
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_txport_select(struct ub960_data *priv, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ lockdep_assert_held(&priv->reg_lock);
+
+ if (priv->reg_current.txport == nport)
+ return 0;
+
+ ret = regmap_write(priv->regmap, UB960_SR_CSI_PORT_SEL,
+ (nport << 4) | BIT(nport));
+ if (ret) {
+ dev_err(dev, "%s: cannot select tx port %d (%d)!\n", __func__,
+ nport, ret);
+ return ret;
+ }
+
+ priv->reg_current.txport = nport;
+
+ return 0;
+}
+
+static int ub960_txport_read(struct ub960_data *priv, u8 nport, u8 reg, u8 *val)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_txport_select(priv, nport);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_read(priv->regmap, reg, &v);
+ if (ret) {
+ dev_err(dev, "%s: cannot read register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+ goto out_unlock;
+ }
+
+ *val = v;
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_txport_write(struct ub960_data *priv, u8 nport, u8 reg, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_txport_select(priv, nport);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_write(priv->regmap, reg, val);
+ if (ret)
+ dev_err(dev, "%s: cannot write register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_txport_update_bits(struct ub960_data *priv, u8 nport, u8 reg,
+ u8 mask, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_txport_select(priv, nport);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_update_bits(priv->regmap, reg, mask, val);
+ if (ret)
+ dev_err(dev, "%s: cannot update register 0x%02x (%d)!\n",
+ __func__, reg, ret);
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_select_ind_reg_block(struct ub960_data *priv, u8 block)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ lockdep_assert_held(&priv->reg_lock);
+
+ if (priv->reg_current.indirect_target == block)
+ return 0;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_CTL, block << 2);
+ if (ret) {
+ dev_err(dev, "%s: cannot select indirect target %u (%d)!\n",
+ __func__, block, ret);
+ return ret;
+ }
+
+ priv->reg_current.indirect_target = block;
+
+ return 0;
+}
+
+static int ub960_read_ind(struct ub960_data *priv, u8 block, u8 reg, u8 *val)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_ADDR, reg);
+ if (ret) {
+ dev_err(dev,
+ "Write to IND_ACC_ADDR failed when reading %u:%x02x: %d\n",
+ block, reg, ret);
+ goto out_unlock;
+ }
+
+ ret = regmap_read(priv->regmap, UB960_SR_IND_ACC_DATA, &v);
+ if (ret) {
+ dev_err(dev,
+ "Write to IND_ACC_DATA failed when reading %u:%x02x: %d\n",
+ block, reg, ret);
+ goto out_unlock;
+ }
+
+ *val = v;
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_write_ind(struct ub960_data *priv, u8 block, u8 reg, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_ADDR, reg);
+ if (ret) {
+ dev_err(dev,
+ "Write to IND_ACC_ADDR failed when writing %u:%x02x: %d\n",
+ block, reg, ret);
+ goto out_unlock;
+ }
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_DATA, val);
+ if (ret) {
+ dev_err(dev,
+ "Write to IND_ACC_DATA failed when writing %u:%x02x: %d\n",
+ block, reg, ret);
+ goto out_unlock;
+ }
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+static int ub960_ind_update_bits(struct ub960_data *priv, u8 block, u8 reg,
+ u8 mask, u8 val)
+{
+ struct device *dev = &priv->client->dev;
+ int ret;
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = ub960_select_ind_reg_block(priv, block);
+ if (ret)
+ goto out_unlock;
+
+ ret = regmap_write(priv->regmap, UB960_SR_IND_ACC_ADDR, reg);
+ if (ret) {
+ dev_err(dev,
+ "Write to IND_ACC_ADDR failed when updating %u:%x02x: %d\n",
+ block, reg, ret);
+ goto out_unlock;
+ }
+
+ ret = regmap_update_bits(priv->regmap, UB960_SR_IND_ACC_DATA, mask,
+ val);
+ if (ret) {
+ dev_err(dev,
+ "Write to IND_ACC_DATA failed when updating %u:%x02x: %d\n",
+ block, reg, ret);
+ goto out_unlock;
+ }
+
+out_unlock:
+ mutex_unlock(&priv->reg_lock);
+
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * I2C-ATR (address translator)
+ */
+
+static int ub960_atr_attach_client(struct i2c_atr *atr, u32 chan_id,
+ const struct i2c_client *client, u16 alias)
+{
+ struct ub960_data *priv = i2c_atr_get_driver_data(atr);
+ struct ub960_rxport *rxport = priv->rxports[chan_id];
+ struct device *dev = &priv->client->dev;
+ unsigned int reg_idx;
+
+ for (reg_idx = 0; reg_idx < ARRAY_SIZE(rxport->aliased_clients); reg_idx++) {
+ if (!rxport->aliased_clients[reg_idx])
+ break;
+ }
+
+ if (reg_idx == ARRAY_SIZE(rxport->aliased_clients)) {
+ dev_err(dev, "rx%u: alias pool exhausted\n", rxport->nport);
+ return -EADDRNOTAVAIL;
+ }
+
+ rxport->aliased_clients[reg_idx] = client;
+
+ ub960_rxport_write(priv, chan_id, UB960_RR_SLAVE_ID(reg_idx),
+ client->addr << 1);
+ ub960_rxport_write(priv, chan_id, UB960_RR_SLAVE_ALIAS(reg_idx),
+ alias << 1);
+
+ dev_dbg(dev, "rx%u: client 0x%02x assigned alias 0x%02x at slot %u\n",
+ rxport->nport, client->addr, alias, reg_idx);
+
+ return 0;
+}
+
+static void ub960_atr_detach_client(struct i2c_atr *atr, u32 chan_id,
+ const struct i2c_client *client)
+{
+ struct ub960_data *priv = i2c_atr_get_driver_data(atr);
+ struct ub960_rxport *rxport = priv->rxports[chan_id];
+ struct device *dev = &priv->client->dev;
+ unsigned int reg_idx;
+
+ for (reg_idx = 0; reg_idx < ARRAY_SIZE(rxport->aliased_clients); reg_idx++) {
+ if (rxport->aliased_clients[reg_idx] == client)
+ break;
+ }
+
+ if (reg_idx == ARRAY_SIZE(rxport->aliased_clients)) {
+ dev_err(dev, "rx%u: client 0x%02x is not mapped!\n",
+ rxport->nport, client->addr);
+ return;
+ }
+
+ rxport->aliased_clients[reg_idx] = NULL;
+
+ ub960_rxport_write(priv, chan_id, UB960_RR_SLAVE_ALIAS(reg_idx), 0);
+
+ dev_dbg(dev, "rx%u: client 0x%02x released at slot %u\n", rxport->nport,
+ client->addr, reg_idx);
+}
+
+static const struct i2c_atr_ops ub960_atr_ops = {
+ .attach_client = ub960_atr_attach_client,
+ .detach_client = ub960_atr_detach_client,
+};
+
+static int ub960_init_atr(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct i2c_adapter *parent_adap = priv->client->adapter;
+
+ priv->atr = i2c_atr_new(parent_adap, dev, &ub960_atr_ops,
+ priv->hw_data->num_rxports);
+ if (IS_ERR(priv->atr))
+ return PTR_ERR(priv->atr);
+
+ i2c_atr_set_driver_data(priv->atr, priv);
+
+ return 0;
+}
+
+static void ub960_uninit_atr(struct ub960_data *priv)
+{
+ i2c_atr_delete(priv->atr);
+ priv->atr = NULL;
+}
+
+/* -----------------------------------------------------------------------------
+ * TX ports
+ */
+
+static int ub960_parse_dt_txport(struct ub960_data *priv,
+ struct fwnode_handle *ep_fwnode,
+ u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ struct v4l2_fwnode_endpoint vep = {};
+ struct ub960_txport *txport;
+ int ret;
+
+ txport = kzalloc(sizeof(*txport), GFP_KERNEL);
+ if (!txport)
+ return -ENOMEM;
+
+ txport->priv = priv;
+ txport->nport = nport;
+
+ vep.bus_type = V4L2_MBUS_CSI2_DPHY;
+ ret = v4l2_fwnode_endpoint_alloc_parse(ep_fwnode, &vep);
+ if (ret) {
+ dev_err(dev, "tx%u: failed to parse endpoint data\n", nport);
+ goto err_free_txport;
+ }
+
+ txport->num_data_lanes = vep.bus.mipi_csi2.num_data_lanes;
+
+ if (vep.nr_of_link_frequencies != 1) {
+ ret = -EINVAL;
+ goto err_free_vep;
+ }
+
+ priv->tx_link_freq[0] = vep.link_frequencies[0];
+ priv->tx_data_rate = priv->tx_link_freq[0] * 2;
+
+ if (priv->tx_data_rate != MHZ(1600) &&
+ priv->tx_data_rate != MHZ(1200) &&
+ priv->tx_data_rate != MHZ(800) &&
+ priv->tx_data_rate != MHZ(400)) {
+ dev_err(dev, "tx%u: invalid 'link-frequencies' value\n", nport);
+ ret = -EINVAL;
+ goto err_free_vep;
+ }
+
+ v4l2_fwnode_endpoint_free(&vep);
+
+ priv->txports[nport] = txport;
+
+ return 0;
+
+err_free_vep:
+ v4l2_fwnode_endpoint_free(&vep);
+err_free_txport:
+ kfree(txport);
+
+ return ret;
+}
+
+static void ub960_csi_handle_events(struct ub960_data *priv, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ u8 csi_tx_isr;
+ int ret;
+
+ ret = ub960_txport_read(priv, nport, UB960_TR_CSI_TX_ISR, &csi_tx_isr);
+ if (ret)
+ return;
+
+ if (csi_tx_isr & UB960_TR_CSI_TX_ISR_IS_CSI_SYNC_ERROR)
+ dev_warn(dev, "TX%u: CSI_SYNC_ERROR\n", nport);
+
+ if (csi_tx_isr & UB960_TR_CSI_TX_ISR_IS_CSI_PASS_ERROR)
+ dev_warn(dev, "TX%u: CSI_PASS_ERROR\n", nport);
+}
+
+/* -----------------------------------------------------------------------------
+ * RX ports
+ */
+
+static int ub960_rxport_enable_vpocs(struct ub960_data *priv)
+{
+ unsigned int nport;
+ int ret;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ ret = regulator_enable(rxport->vpoc);
+ if (ret)
+ goto err_disable_vpocs;
+ }
+
+ return 0;
+
+err_disable_vpocs:
+ while (nport--) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ regulator_disable(rxport->vpoc);
+ }
+
+ return ret;
+}
+
+static void ub960_rxport_disable_vpocs(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport || !rxport->vpoc)
+ continue;
+
+ regulator_disable(rxport->vpoc);
+ }
+}
+
+static void ub960_rxport_clear_errors(struct ub960_data *priv,
+ unsigned int nport)
+{
+ u8 v;
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS1, &v);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS2, &v);
+ ub960_rxport_read(priv, nport, UB960_RR_CSI_RX_STS, &v);
+ ub960_rxport_read(priv, nport, UB960_RR_BCC_STATUS, &v);
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_HI, &v);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PAR_ERR_LO, &v);
+
+ ub960_rxport_read(priv, nport, UB960_RR_CSI_ERR_COUNTER, &v);
+}
+
+static void ub960_clear_rx_errors(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++)
+ ub960_rxport_clear_errors(priv, nport);
+}
+
+static int ub960_rxport_get_strobe_pos(struct ub960_data *priv,
+ unsigned int nport, s8 *strobe_pos)
+{
+ u8 v;
+ u8 clk_delay, data_delay;
+ int ret;
+
+ ub960_read_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
+ UB960_IR_RX_ANA_STROBE_SET_CLK, &v);
+
+ clk_delay = (v & UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY) ?
+ 0 : UB960_MANUAL_STROBE_EXTRA_DELAY;
+
+ ub960_read_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
+ UB960_IR_RX_ANA_STROBE_SET_DATA, &v);
+
+ data_delay = (v & UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY) ?
+ 0 : UB960_MANUAL_STROBE_EXTRA_DELAY;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_SFILTER_STS_0, &v);
+ if (ret)
+ return ret;
+
+ clk_delay += v & UB960_IR_RX_ANA_STROBE_SET_CLK_DELAY_MASK;
+
+ ub960_rxport_read(priv, nport, UB960_RR_SFILTER_STS_1, &v);
+ if (ret)
+ return ret;
+
+ data_delay += v & UB960_IR_RX_ANA_STROBE_SET_DATA_DELAY_MASK;
+
+ *strobe_pos = data_delay - clk_delay;
+
+ return 0;
+}
+
+static void ub960_rxport_set_strobe_pos(struct ub960_data *priv,
+ unsigned int nport, s8 strobe_pos)
+{
+ u8 clk_delay, data_delay;
+
+ clk_delay = UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY;
+ data_delay = UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY;
+
+ if (strobe_pos < UB960_MIN_AEQ_STROBE_POS)
+ clk_delay = abs(strobe_pos) - UB960_MANUAL_STROBE_EXTRA_DELAY;
+ else if (strobe_pos > UB960_MAX_AEQ_STROBE_POS)
+ data_delay = strobe_pos - UB960_MANUAL_STROBE_EXTRA_DELAY;
+ else if (strobe_pos < 0)
+ clk_delay = abs(strobe_pos) | UB960_IR_RX_ANA_STROBE_SET_CLK_NO_EXTRA_DELAY;
+ else if (strobe_pos > 0)
+ data_delay = strobe_pos | UB960_IR_RX_ANA_STROBE_SET_DATA_NO_EXTRA_DELAY;
+
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
+ UB960_IR_RX_ANA_STROBE_SET_CLK, clk_delay);
+
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport),
+ UB960_IR_RX_ANA_STROBE_SET_DATA, data_delay);
+}
+
+static void ub960_rxport_set_strobe_range(struct ub960_data *priv,
+ s8 strobe_min, s8 strobe_max)
+{
+ /* Convert the signed strobe pos to positive zero based value */
+ strobe_min -= UB960_MIN_AEQ_STROBE_POS;
+ strobe_max -= UB960_MIN_AEQ_STROBE_POS;
+
+ ub960_write(priv, UB960_XR_SFILTER_CFG,
+ ((u8)strobe_min << UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT) |
+ ((u8)strobe_max << UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT));
+}
+
+static int ub960_rxport_get_eq_level(struct ub960_data *priv,
+ unsigned int nport, u8 *eq_level)
+{
+ int ret;
+ u8 v;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_AEQ_STATUS, &v);
+ if (ret)
+ return ret;
+
+ *eq_level = (v & UB960_RR_AEQ_STATUS_STATUS_1) +
+ (v & UB960_RR_AEQ_STATUS_STATUS_2);
+
+ return 0;
+}
+
+static void ub960_rxport_set_eq_level(struct ub960_data *priv,
+ unsigned int nport, u8 eq_level)
+{
+ u8 eq_stage_1_select_value, eq_stage_2_select_value;
+ const unsigned int eq_stage_max = 7;
+ u8 v;
+
+ if (eq_level <= eq_stage_max) {
+ eq_stage_1_select_value = eq_level;
+ eq_stage_2_select_value = 0;
+ } else {
+ eq_stage_1_select_value = eq_stage_max;
+ eq_stage_2_select_value = eq_level - eq_stage_max;
+ }
+
+ ub960_rxport_read(priv, nport, UB960_RR_AEQ_BYPASS, &v);
+
+ v &= ~(UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_MASK |
+ UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_MASK);
+ v |= eq_stage_1_select_value << UB960_RR_AEQ_BYPASS_EQ_STAGE1_VALUE_SHIFT;
+ v |= eq_stage_2_select_value << UB960_RR_AEQ_BYPASS_EQ_STAGE2_VALUE_SHIFT;
+ v |= UB960_RR_AEQ_BYPASS_ENABLE;
+
+ ub960_rxport_write(priv, nport, UB960_RR_AEQ_BYPASS, v);
+}
+
+static void ub960_rxport_set_eq_range(struct ub960_data *priv,
+ unsigned int nport, u8 eq_min, u8 eq_max)
+{
+ ub960_rxport_write(priv, nport, UB960_RR_AEQ_MIN_MAX,
+ (eq_min << UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT) |
+ (eq_max << UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT));
+
+ /* Enable AEQ min setting */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_CTL2,
+ UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR,
+ UB960_RR_AEQ_CTL2_SET_AEQ_FLOOR);
+}
+
+static void ub960_rxport_config_eq(struct ub960_data *priv, unsigned int nport)
+{
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ /* We also set common settings here. Should be moved elsewhere. */
+
+ if (priv->strobe.manual) {
+ /* Disable AEQ_SFILTER_EN */
+ ub960_update_bits(priv, UB960_XR_AEQ_CTL1,
+ UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN, 0);
+ } else {
+ /* Enable SFILTER and error control */
+ ub960_write(priv, UB960_XR_AEQ_CTL1,
+ UB960_XR_AEQ_CTL1_AEQ_ERR_CTL_MASK |
+ UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN);
+
+ /* Set AEQ strobe range */
+ ub960_rxport_set_strobe_range(priv, priv->strobe.min,
+ priv->strobe.max);
+ }
+
+ /* The rest are port specific */
+
+ if (priv->strobe.manual)
+ ub960_rxport_set_strobe_pos(priv, nport, rxport->eq.strobe_pos);
+ else
+ ub960_rxport_set_strobe_pos(priv, nport, 0);
+
+ if (rxport->eq.manual_eq) {
+ ub960_rxport_set_eq_level(priv, nport,
+ rxport->eq.manual.eq_level);
+
+ /* Enable AEQ Bypass */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_BYPASS,
+ UB960_RR_AEQ_BYPASS_ENABLE,
+ UB960_RR_AEQ_BYPASS_ENABLE);
+ } else {
+ ub960_rxport_set_eq_range(priv, nport,
+ rxport->eq.aeq.eq_level_min,
+ rxport->eq.aeq.eq_level_max);
+
+ /* Disable AEQ Bypass */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_AEQ_BYPASS,
+ UB960_RR_AEQ_BYPASS_ENABLE, 0);
+ }
+}
+
+static int ub960_rxport_link_ok(struct ub960_data *priv, unsigned int nport,
+ bool *ok)
+{
+ u8 rx_port_sts1, rx_port_sts2;
+ u16 parity_errors;
+ u8 csi_rx_sts;
+ u8 csi_err_cnt;
+ u8 bcc_sts;
+ int ret;
+ bool errors;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS1,
+ &rx_port_sts1);
+ if (ret)
+ return ret;
+
+ if (!(rx_port_sts1 & UB960_RR_RX_PORT_STS1_LOCK_STS)) {
+ *ok = false;
+ return 0;
+ }
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS2,
+ &rx_port_sts2);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_CSI_RX_STS, &csi_rx_sts);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_CSI_ERR_COUNTER,
+ &csi_err_cnt);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read(priv, nport, UB960_RR_BCC_STATUS, &bcc_sts);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_read16(priv, nport, UB960_RR_RX_PAR_ERR_HI,
+ &parity_errors);
+ if (ret)
+ return ret;
+
+ errors = (rx_port_sts1 & UB960_RR_RX_PORT_STS1_ERROR_MASK) ||
+ (rx_port_sts2 & UB960_RR_RX_PORT_STS2_ERROR_MASK) ||
+ (bcc_sts & UB960_RR_BCC_STATUS_ERROR_MASK) ||
+ (csi_rx_sts & UB960_RR_CSI_RX_STS_ERROR_MASK) || csi_err_cnt ||
+ parity_errors;
+
+ *ok = !errors;
+
+ return 0;
+}
+
+/*
+ * Wait for the RX ports to lock, have no errors and have stable strobe position
+ * and EQ level.
+ */
+static int ub960_rxport_wait_locks(struct ub960_data *priv,
+ unsigned long port_mask,
+ unsigned int *lock_mask)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned long timeout;
+ unsigned int link_ok_mask;
+ unsigned int missing;
+ unsigned int loops;
+ u8 nport;
+ int ret;
+
+ if (port_mask == 0) {
+ if (lock_mask)
+ *lock_mask = 0;
+ return 0;
+ }
+
+ if (port_mask >= BIT(priv->hw_data->num_rxports))
+ return -EINVAL;
+
+ timeout = jiffies + msecs_to_jiffies(1000);
+ loops = 0;
+ link_ok_mask = 0;
+
+ while (time_before(jiffies, timeout)) {
+ missing = 0;
+
+ for_each_set_bit(nport, &port_mask,
+ priv->hw_data->num_rxports) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ bool ok;
+
+ if (!rxport)
+ continue;
+
+ ret = ub960_rxport_link_ok(priv, nport, &ok);
+ if (ret)
+ return ret;
+
+ /*
+ * We want the link to be ok for two consecutive loops,
+ * as a link could get established just before our test
+ * and drop soon after.
+ */
+ if (!ok || !(link_ok_mask & BIT(nport)))
+ missing++;
+
+ if (ok)
+ link_ok_mask |= BIT(nport);
+ else
+ link_ok_mask &= ~BIT(nport);
+ }
+
+ loops++;
+
+ if (missing == 0)
+ break;
+
+ msleep(50);
+ }
+
+ if (lock_mask)
+ *lock_mask = link_ok_mask;
+
+ dev_dbg(dev, "Wait locks done in %u loops\n", loops);
+ for_each_set_bit(nport, &port_mask, priv->hw_data->num_rxports) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ s8 strobe_pos, eq_level;
+ u16 v;
+
+ if (!rxport)
+ continue;
+
+ if (!(link_ok_mask & BIT(nport))) {
+ dev_dbg(dev, "\trx%u: not locked\n", nport);
+ continue;
+ }
+
+ ub960_rxport_read16(priv, nport, UB960_RR_RX_FREQ_HIGH, &v);
+
+ ret = ub960_rxport_get_strobe_pos(priv, nport, &strobe_pos);
+ if (ret)
+ return ret;
+
+ ret = ub960_rxport_get_eq_level(priv, nport, &eq_level);
+ if (ret)
+ return ret;
+
+ dev_dbg(dev, "\trx%u: locked, SP: %d, EQ: %u, freq %llu Hz\n",
+ nport, strobe_pos, eq_level, (v * 1000000ULL) >> 8);
+ }
+
+ return 0;
+}
+
+static unsigned long ub960_calc_bc_clk_rate_ub960(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int mult;
+ unsigned int div;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ mult = 1;
+ div = 10;
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ mult = 2;
+ div = 1;
+ break;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ mult = 2;
+ div = 5;
+ break;
+
+ default:
+ return 0;
+ }
+
+ return clk_get_rate(priv->refclk) * mult / div;
+}
+
+static unsigned long ub960_calc_bc_clk_rate_ub9702(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ return 2359400;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ return 47187500;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ return 9437500;
+
+ default:
+ return 0;
+ }
+}
+
+static int ub960_rxport_add_serializer(struct ub960_data *priv, u8 nport)
+{
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ struct device *dev = &priv->client->dev;
+ struct ds90ub9xx_platform_data *ser_pdata = &rxport->ser.pdata;
+ struct i2c_board_info ser_info = {
+ .of_node = to_of_node(rxport->ser.fwnode),
+ .fwnode = rxport->ser.fwnode,
+ .platform_data = ser_pdata,
+ };
+
+ ser_pdata->port = nport;
+ ser_pdata->atr = priv->atr;
+ if (priv->hw_data->is_ub9702)
+ ser_pdata->bc_rate = ub960_calc_bc_clk_rate_ub9702(priv, rxport);
+ else
+ ser_pdata->bc_rate = ub960_calc_bc_clk_rate_ub960(priv, rxport);
+
+ /*
+ * The serializer is added under the same i2c adapter as the
+ * deserializer. This is not quite right, as the serializer is behind
+ * the FPD-Link.
+ */
+ ser_info.addr = rxport->ser.alias;
+ rxport->ser.client =
+ i2c_new_client_device(priv->client->adapter, &ser_info);
+ if (!rxport->ser.client) {
+ dev_err(dev, "rx%u: cannot add %s i2c device", nport,
+ ser_info.type);
+ return -EIO;
+ }
+
+ dev_dbg(dev, "rx%u: remote serializer at alias 0x%02x (%u-%04x)\n",
+ nport, rxport->ser.client->addr,
+ rxport->ser.client->adapter->nr, rxport->ser.client->addr);
+
+ return 0;
+}
+
+static void ub960_rxport_remove_serializer(struct ub960_data *priv, u8 nport)
+{
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ i2c_unregister_device(rxport->ser.client);
+ rxport->ser.client = NULL;
+}
+
+/* Add serializer i2c devices for all initialized ports */
+static int ub960_rxport_add_serializers(struct ub960_data *priv)
+{
+ unsigned int nport;
+ int ret;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ ret = ub960_rxport_add_serializer(priv, nport);
+ if (ret)
+ goto err_remove_sers;
+ }
+
+ return 0;
+
+err_remove_sers:
+ while (nport--) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ ub960_rxport_remove_serializer(priv, nport);
+ }
+
+ return ret;
+}
+
+static void ub960_rxport_remove_serializers(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ ub960_rxport_remove_serializer(priv, nport);
+ }
+}
+
+static void ub960_init_tx_port(struct ub960_data *priv,
+ struct ub960_txport *txport)
+{
+ unsigned int nport = txport->nport;
+ u8 csi_ctl = 0;
+
+ /*
+ * From the datasheet: "initial CSI Skew-Calibration
+ * sequence [...] should be set when operating at 1.6 Gbps"
+ */
+ if (priv->tx_data_rate == MHZ(1600))
+ csi_ctl |= UB960_TR_CSI_CTL_CSI_CAL_EN;
+
+ csi_ctl |= (4 - txport->num_data_lanes) << 4;
+
+ ub960_txport_write(priv, nport, UB960_TR_CSI_CTL, csi_ctl);
+}
+
+static int ub960_init_tx_ports(struct ub960_data *priv)
+{
+ unsigned int nport;
+ u8 speed_select;
+ u8 pll_div;
+
+ /* TX ports */
+
+ switch (priv->tx_data_rate) {
+ case MHZ(1600):
+ default:
+ speed_select = 0;
+ pll_div = 0x10;
+ break;
+ case MHZ(1200):
+ speed_select = 1;
+ break;
+ case MHZ(800):
+ speed_select = 2;
+ pll_div = 0x10;
+ break;
+ case MHZ(400):
+ speed_select = 3;
+ pll_div = 0x10;
+ break;
+ }
+
+ ub960_write(priv, UB960_SR_CSI_PLL_CTL, speed_select);
+
+ if (priv->hw_data->is_ub9702) {
+ ub960_write(priv, UB960_SR_CSI_PLL_DIV, pll_div);
+
+ switch (priv->tx_data_rate) {
+ case MHZ(1600):
+ default:
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x92, 0x80);
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x4b, 0x2a);
+ break;
+ case MHZ(800):
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x92, 0x90);
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x4f, 0x2a);
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x4b, 0x2a);
+ break;
+ case MHZ(400):
+ ub960_write_ind(priv, UB960_IND_TARGET_CSI_ANA, 0x92, 0xa0);
+ break;
+ }
+ }
+
+ for (nport = 0; nport < priv->hw_data->num_txports; nport++) {
+ struct ub960_txport *txport = priv->txports[nport];
+
+ if (!txport)
+ continue;
+
+ ub960_init_tx_port(priv, txport);
+ }
+
+ return 0;
+}
+
+static void ub960_init_rx_port_ub960(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+ u32 bc_freq_val;
+
+ /*
+ * Back channel frequency select.
+ * Override FREQ_SELECT from the strap.
+ * 0 - 2.5 Mbps (DS90UB913A-Q1 / DS90UB933-Q1)
+ * 2 - 10 Mbps
+ * 6 - 50 Mbps (DS90UB953-Q1)
+ *
+ * Note that changing this setting will result in some errors on the back
+ * channel for a short period of time.
+ */
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ bc_freq_val = 0;
+ break;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ bc_freq_val = 2;
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ bc_freq_val = 6;
+ break;
+
+ default:
+ return;
+ }
+
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG,
+ UB960_RR_BCC_CONFIG_BC_FREQ_SEL_MASK,
+ bc_freq_val);
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ /* FPD3_MODE = RAW10 Mode (DS90UB913A-Q1 / DS90UB933-Q1 compatible) */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG,
+ UB960_RR_PORT_CONFIG_FPD3_MODE_MASK,
+ 0x3);
+
+ /*
+ * RAW10_8BIT_CTL = 0b10 : 8-bit processing using upper 8 bits
+ */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2,
+ UB960_RR_PORT_CONFIG2_RAW10_8BIT_CTL_MASK,
+ 0x2 << UB960_RR_PORT_CONFIG2_RAW10_8BIT_CTL_SHIFT);
+
+ break;
+
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ /* Not implemented */
+ return;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ case RXPORT_MODE_CSI2_ASYNC:
+ /* CSI-2 Mode (DS90UB953-Q1 compatible) */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG, 0x3,
+ 0x0);
+
+ break;
+ }
+
+ /* LV_POLARITY & FV_POLARITY */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2, 0x3,
+ rxport->lv_fv_pol);
+
+ /* Enable all interrupt sources from this port */
+ ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_HI, 0x07);
+ ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_LO, 0x7f);
+
+ /* Enable I2C_PASS_THROUGH */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG,
+ UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH,
+ UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH);
+
+ /* Enable I2C communication to the serializer via the alias addr */
+ ub960_rxport_write(priv, nport, UB960_RR_SER_ALIAS_ID,
+ rxport->ser.alias << 1);
+
+ /* Configure EQ related settings */
+ ub960_rxport_config_eq(priv, nport);
+
+ /* Enable RX port */
+ ub960_update_bits(priv, UB960_SR_RX_PORT_CTL, BIT(nport), BIT(nport));
+}
+
+static void ub960_init_rx_port_ub9702_fpd3(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+ u8 bc_freq_val;
+ u8 fpd_func_mode;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ bc_freq_val = 0;
+ fpd_func_mode = 5;
+ break;
+
+ case RXPORT_MODE_RAW12_HF:
+ bc_freq_val = 0;
+ fpd_func_mode = 4;
+ break;
+
+ case RXPORT_MODE_RAW12_LF:
+ bc_freq_val = 0;
+ fpd_func_mode = 6;
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ bc_freq_val = 6;
+ fpd_func_mode = 2;
+ break;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ bc_freq_val = 2;
+ fpd_func_mode = 2;
+ break;
+
+ default:
+ return;
+ }
+
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG, 0x7,
+ bc_freq_val);
+ ub960_rxport_write(priv, nport, UB960_RR_CHANNEL_MODE, fpd_func_mode);
+
+ /* set serdes_eq_mode = 1 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0xa8, 0x80);
+
+ /* enable serdes driver */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x0d, 0x7f);
+
+ /* set serdes_eq_offset=4 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2b, 0x04);
+
+ /* init default serdes_eq_max in 0xa9 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0xa9, 0x23);
+
+ /* init serdes_eq_min in 0xaa */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0xaa, 0);
+
+ /* serdes_driver_ctl2 control: DS90UB953-Q1/DS90UB933-Q1/DS90UB913A-Q1 */
+ ub960_ind_update_bits(priv, UB960_IND_TARGET_RX_ANA(nport), 0x1b,
+ BIT(3), BIT(3));
+
+ /* RX port to half-rate */
+ ub960_update_bits(priv, UB960_SR_FPD_RATE_CFG, 0x3 << (nport * 2),
+ BIT(nport * 2));
+}
+
+static void ub960_init_rx_port_ub9702_fpd4_aeq(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+ bool first_time_power_up = true;
+
+ if (first_time_power_up) {
+ u8 v;
+
+ /* AEQ init */
+ ub960_read_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2c, &v);
+
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x27, v);
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x28, v + 1);
+
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2b, 0x00);
+ }
+
+ /* enable serdes_eq_ctl2 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x9e, 0x00);
+
+ /* enable serdes_eq_ctl1 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x90, 0x40);
+
+ /* enable serdes_eq_en */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2e, 0x40);
+
+ /* disable serdes_eq_override */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0xf0, 0x00);
+
+ /* disable serdes_gain_override */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x71, 0x00);
+}
+
+static void ub960_init_rx_port_ub9702_fpd4(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+ u8 bc_freq_val;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ bc_freq_val = 0;
+ break;
+
+ case RXPORT_MODE_RAW12_HF:
+ bc_freq_val = 0;
+ break;
+
+ case RXPORT_MODE_RAW12_LF:
+ bc_freq_val = 0;
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ bc_freq_val = 6;
+ break;
+
+ case RXPORT_MODE_CSI2_ASYNC:
+ bc_freq_val = 2;
+ break;
+
+ default:
+ return;
+ }
+
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG, 0x7,
+ bc_freq_val);
+
+ /* FPD4 Sync Mode */
+ ub960_rxport_write(priv, nport, UB960_RR_CHANNEL_MODE, 0);
+
+ /* add serdes_eq_offset of 4 */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x2b, 0x04);
+
+ /* FPD4 serdes_start_eq in 0x27: assign default */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x27, 0x0);
+ /* FPD4 serdes_end_eq in 0x28: assign default */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x28, 0x23);
+
+ /* set serdes_driver_mode into FPD IV mode */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x04, 0x00);
+ /* set FPD PBC drv into FPD IV mode */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x1b, 0x00);
+
+ /* set serdes_system_init to 0x2f */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x21, 0x2f);
+ /* set serdes_system_rst in reset mode */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x25, 0xc1);
+
+ /* RX port to 7.55G mode */
+ ub960_update_bits(priv, UB960_SR_FPD_RATE_CFG, 0x3 << (nport * 2),
+ 0 << (nport * 2));
+
+ ub960_init_rx_port_ub9702_fpd4_aeq(priv, rxport);
+}
+
+static void ub960_init_rx_port_ub9702(struct ub960_data *priv,
+ struct ub960_rxport *rxport)
+{
+ unsigned int nport = rxport->nport;
+
+ if (rxport->cdr_mode == RXPORT_CDR_FPD3)
+ ub960_init_rx_port_ub9702_fpd3(priv, rxport);
+ else /* RXPORT_CDR_FPD4 */
+ ub960_init_rx_port_ub9702_fpd4(priv, rxport);
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ /*
+ * RAW10_8BIT_CTL = 0b11 : 8-bit processing using lower 8 bits
+ * 0b10 : 8-bit processing using upper 8 bits
+ */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2,
+ 0x3 << 6, 0x2 << 6);
+
+ break;
+
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ /* Not implemented */
+ return;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ case RXPORT_MODE_CSI2_ASYNC:
+
+ break;
+ }
+
+ /* LV_POLARITY & FV_POLARITY */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_PORT_CONFIG2, 0x3,
+ rxport->lv_fv_pol);
+
+ /* Enable all interrupt sources from this port */
+ ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_HI, 0x07);
+ ub960_rxport_write(priv, nport, UB960_RR_PORT_ICR_LO, 0x7f);
+
+ /* Enable I2C_PASS_THROUGH */
+ ub960_rxport_update_bits(priv, nport, UB960_RR_BCC_CONFIG,
+ UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH,
+ UB960_RR_BCC_CONFIG_I2C_PASS_THROUGH);
+
+ /* Enable I2C communication to the serializer via the alias addr */
+ ub960_rxport_write(priv, nport, UB960_RR_SER_ALIAS_ID,
+ rxport->ser.alias << 1);
+
+ /* Enable RX port */
+ ub960_update_bits(priv, UB960_SR_RX_PORT_CTL, BIT(nport), BIT(nport));
+
+ if (rxport->cdr_mode == RXPORT_CDR_FPD4) {
+ /* unreset 960 AEQ */
+ ub960_write_ind(priv, UB960_IND_TARGET_RX_ANA(nport), 0x25, 0x41);
+ }
+}
+
+static int ub960_init_rx_ports(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ if (priv->hw_data->is_ub9702)
+ ub960_init_rx_port_ub9702(priv, rxport);
+ else
+ ub960_init_rx_port_ub960(priv, rxport);
+ }
+
+ return 0;
+}
+
+static void ub960_rxport_handle_events(struct ub960_data *priv, u8 nport)
+{
+ struct device *dev = &priv->client->dev;
+ u8 rx_port_sts1;
+ u8 rx_port_sts2;
+ u8 csi_rx_sts;
+ u8 bcc_sts;
+ int ret = 0;
+
+ /* Read interrupts (also clears most of them) */
+ if (!ret)
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS1,
+ &rx_port_sts1);
+ if (!ret)
+ ret = ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS2,
+ &rx_port_sts2);
+ if (!ret)
+ ret = ub960_rxport_read(priv, nport, UB960_RR_CSI_RX_STS,
+ &csi_rx_sts);
+ if (!ret)
+ ret = ub960_rxport_read(priv, nport, UB960_RR_BCC_STATUS,
+ &bcc_sts);
+
+ if (ret)
+ return;
+
+ if (rx_port_sts1 & UB960_RR_RX_PORT_STS1_PARITY_ERROR) {
+ u16 v;
+
+ ret = ub960_rxport_read16(priv, nport, UB960_RR_RX_PAR_ERR_HI,
+ &v);
+ if (!ret)
+ dev_err(dev, "rx%u parity errors: %u\n", nport, v);
+ }
+
+ if (rx_port_sts1 & UB960_RR_RX_PORT_STS1_BCC_CRC_ERROR)
+ dev_err(dev, "rx%u BCC CRC error\n", nport);
+
+ if (rx_port_sts1 & UB960_RR_RX_PORT_STS1_BCC_SEQ_ERROR)
+ dev_err(dev, "rx%u BCC SEQ error\n", nport);
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_LINE_LEN_UNSTABLE)
+ dev_err(dev, "rx%u line length unstable\n", nport);
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_FPD3_ENCODE_ERROR)
+ dev_err(dev, "rx%u FPD3 encode error\n", nport);
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_BUFFER_ERROR)
+ dev_err(dev, "rx%u buffer error\n", nport);
+
+ if (csi_rx_sts)
+ dev_err(dev, "rx%u CSI error: %#02x\n", nport, csi_rx_sts);
+
+ if (csi_rx_sts & UB960_RR_CSI_RX_STS_ECC1_ERR)
+ dev_err(dev, "rx%u CSI ECC1 error\n", nport);
+
+ if (csi_rx_sts & UB960_RR_CSI_RX_STS_ECC2_ERR)
+ dev_err(dev, "rx%u CSI ECC2 error\n", nport);
+
+ if (csi_rx_sts & UB960_RR_CSI_RX_STS_CKSUM_ERR)
+ dev_err(dev, "rx%u CSI checksum error\n", nport);
+
+ if (csi_rx_sts & UB960_RR_CSI_RX_STS_LENGTH_ERR)
+ dev_err(dev, "rx%u CSI length error\n", nport);
+
+ if (bcc_sts)
+ dev_err(dev, "rx%u BCC error: %#02x\n", nport, bcc_sts);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_RESP_ERR)
+ dev_err(dev, "rx%u BCC response error", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_SLAVE_TO)
+ dev_err(dev, "rx%u BCC slave timeout", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_SLAVE_ERR)
+ dev_err(dev, "rx%u BCC slave error", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_MASTER_TO)
+ dev_err(dev, "rx%u BCC master timeout", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_MASTER_ERR)
+ dev_err(dev, "rx%u BCC master error", nport);
+
+ if (bcc_sts & UB960_RR_BCC_STATUS_SEQ_ERROR)
+ dev_err(dev, "rx%u BCC sequence error", nport);
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_LINE_LEN_CHG) {
+ u16 v;
+
+ ret = ub960_rxport_read16(priv, nport, UB960_RR_LINE_LEN_1, &v);
+ if (!ret)
+ dev_dbg(dev, "rx%u line len changed: %u\n", nport, v);
+ }
+
+ if (rx_port_sts2 & UB960_RR_RX_PORT_STS2_LINE_CNT_CHG) {
+ u16 v;
+
+ ret = ub960_rxport_read16(priv, nport, UB960_RR_LINE_COUNT_HI,
+ &v);
+ if (!ret)
+ dev_dbg(dev, "rx%u line count changed: %u\n", nport, v);
+ }
+
+ if (rx_port_sts1 & UB960_RR_RX_PORT_STS1_LOCK_STS_CHG) {
+ dev_dbg(dev, "rx%u: %s, %s, %s, %s\n", nport,
+ (rx_port_sts1 & UB960_RR_RX_PORT_STS1_LOCK_STS) ?
+ "locked" :
+ "unlocked",
+ (rx_port_sts1 & UB960_RR_RX_PORT_STS1_PORT_PASS) ?
+ "passed" :
+ "not passed",
+ (rx_port_sts2 & UB960_RR_RX_PORT_STS2_CABLE_FAULT) ?
+ "no clock" :
+ "clock ok",
+ (rx_port_sts2 & UB960_RR_RX_PORT_STS2_FREQ_STABLE) ?
+ "stable freq" :
+ "unstable freq");
+ }
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2
+ */
+
+/*
+ * The current implementation only supports a simple VC mapping, where all VCs
+ * from a one RX port will be mapped to the same VC. Also, the hardware
+ * dictates that all streams from an RX port must go to a single TX port.
+ *
+ * This function decides the target VC numbers for each RX port with a simple
+ * algorithm, so that for each TX port, we get VC numbers starting from 0,
+ * and counting up.
+ *
+ * E.g. if all four RX ports are in use, of which the first two go to the
+ * first TX port and the secont two go to the second TX port, we would get
+ * the following VCs for the four RX ports: 0, 1, 0, 1.
+ *
+ * TODO: implement a more sophisticated VC mapping. As the driver cannot know
+ * what VCs the sinks expect (say, an FPGA with hardcoded VC routing), this
+ * probably needs to be somehow configurable. Device tree?
+ */
+static void ub960_get_vc_maps(struct ub960_data *priv,
+ struct v4l2_subdev_state *state, u8 *vc)
+{
+ u8 cur_vc[UB960_MAX_TX_NPORTS] = {};
+ struct v4l2_subdev_route *route;
+ u8 handled_mask = 0;
+
+ for_each_active_route(&state->routing, route) {
+ unsigned int rx, tx;
+
+ rx = ub960_pad_to_port(priv, route->sink_pad);
+ if (BIT(rx) & handled_mask)
+ continue;
+
+ tx = ub960_pad_to_port(priv, route->source_pad);
+
+ vc[rx] = cur_vc[tx]++;
+ handled_mask |= BIT(rx);
+ }
+}
+
+static int ub960_enable_tx_port(struct ub960_data *priv, unsigned int nport)
+{
+ struct device *dev = &priv->client->dev;
+
+ dev_dbg(dev, "enable TX port %u\n", nport);
+
+ return ub960_txport_update_bits(priv, nport, UB960_TR_CSI_CTL,
+ UB960_TR_CSI_CTL_CSI_ENABLE,
+ UB960_TR_CSI_CTL_CSI_ENABLE);
+}
+
+static void ub960_disable_tx_port(struct ub960_data *priv, unsigned int nport)
+{
+ struct device *dev = &priv->client->dev;
+
+ dev_dbg(dev, "disable TX port %u\n", nport);
+
+ ub960_txport_update_bits(priv, nport, UB960_TR_CSI_CTL,
+ UB960_TR_CSI_CTL_CSI_ENABLE, 0);
+}
+
+static int ub960_enable_rx_port(struct ub960_data *priv, unsigned int nport)
+{
+ struct device *dev = &priv->client->dev;
+
+ dev_dbg(dev, "enable RX port %u\n", nport);
+
+ /* Enable forwarding */
+ return ub960_update_bits(priv, UB960_SR_FWD_CTL1, BIT(4 + nport), 0);
+}
+
+static void ub960_disable_rx_port(struct ub960_data *priv, unsigned int nport)
+{
+ struct device *dev = &priv->client->dev;
+
+ dev_dbg(dev, "disable RX port %u\n", nport);
+
+ /* Disable forwarding */
+ ub960_update_bits(priv, UB960_SR_FWD_CTL1, BIT(4 + nport),
+ BIT(4 + nport));
+}
+
+/*
+ * The driver only supports using a single VC for each source. This function
+ * checks that each source only provides streams using a single VC.
+ */
+static int ub960_validate_stream_vcs(struct ub960_data *priv)
+{
+ unsigned int nport;
+ unsigned int i;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ struct v4l2_mbus_frame_desc desc;
+ int ret;
+ u8 vc;
+
+ if (!rxport)
+ continue;
+
+ ret = v4l2_subdev_call(rxport->source.sd, pad, get_frame_desc,
+ rxport->source.pad, &desc);
+ if (ret)
+ return ret;
+
+ if (desc.type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2)
+ continue;
+
+ if (desc.num_entries == 0)
+ continue;
+
+ vc = desc.entry[0].bus.csi2.vc;
+
+ for (i = 1; i < desc.num_entries; i++) {
+ if (vc == desc.entry[i].bus.csi2.vc)
+ continue;
+
+ dev_err(&priv->client->dev,
+ "rx%u: source with multiple virtual-channels is not supported\n",
+ nport);
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
+static int ub960_configure_ports_for_streaming(struct ub960_data *priv,
+ struct v4l2_subdev_state *state)
+{
+ u8 fwd_ctl;
+ struct {
+ u32 num_streams;
+ u8 pixel_dt;
+ u8 meta_dt;
+ u32 meta_lines;
+ u32 tx_port;
+ } rx_data[UB960_MAX_RX_NPORTS] = {};
+ u8 vc_map[UB960_MAX_RX_NPORTS] = {};
+ struct v4l2_subdev_route *route;
+ unsigned int nport;
+ int ret;
+
+ ret = ub960_validate_stream_vcs(priv);
+ if (ret)
+ return ret;
+
+ ub960_get_vc_maps(priv, state, vc_map);
+
+ for_each_active_route(&state->routing, route) {
+ struct ub960_rxport *rxport;
+ struct ub960_txport *txport;
+ struct v4l2_mbus_framefmt *fmt;
+ const struct ub960_format_info *ub960_fmt;
+ unsigned int nport;
+
+ nport = ub960_pad_to_port(priv, route->sink_pad);
+
+ rxport = priv->rxports[nport];
+ if (!rxport)
+ return -EINVAL;
+
+ txport = priv->txports[ub960_pad_to_port(priv, route->source_pad)];
+ if (!txport)
+ return -EINVAL;
+
+ rx_data[nport].tx_port = ub960_pad_to_port(priv, route->source_pad);
+
+ rx_data[nport].num_streams++;
+
+ /* For the rest, we are only interested in parallel busses */
+ if (rxport->rx_mode == RXPORT_MODE_CSI2_SYNC ||
+ rxport->rx_mode == RXPORT_MODE_CSI2_ASYNC)
+ continue;
+
+ if (rx_data[nport].num_streams > 2)
+ return -EPIPE;
+
+ fmt = v4l2_subdev_state_get_stream_format(state,
+ route->sink_pad,
+ route->sink_stream);
+ if (!fmt)
+ return -EPIPE;
+
+ ub960_fmt = ub960_find_format(fmt->code);
+ if (!ub960_fmt)
+ return -EPIPE;
+
+ if (ub960_fmt->meta) {
+ if (fmt->height > 3) {
+ dev_err(&priv->client->dev,
+ "rx%u: unsupported metadata height %u\n",
+ nport, fmt->height);
+ return -EPIPE;
+ }
+
+ rx_data[nport].meta_dt = ub960_fmt->datatype;
+ rx_data[nport].meta_lines = fmt->height;
+ } else {
+ rx_data[nport].pixel_dt = ub960_fmt->datatype;
+ }
+ }
+
+ /* Configure RX ports */
+
+ fwd_ctl = 0;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ u8 vc = vc_map[nport];
+
+ if (rx_data[nport].num_streams == 0)
+ continue;
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ ub960_rxport_write(priv, nport, UB960_RR_RAW10_ID,
+ rx_data[nport].pixel_dt | (vc << UB960_RR_RAW10_ID_VC_SHIFT));
+
+ ub960_rxport_write(priv, rxport->nport,
+ UB960_RR_RAW_EMBED_DTYPE,
+ (rx_data[nport].meta_lines << UB960_RR_RAW_EMBED_DTYPE_LINES_SHIFT) |
+ rx_data[nport].meta_dt);
+
+ break;
+
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ /* Not implemented */
+ break;
+
+ case RXPORT_MODE_CSI2_SYNC:
+ case RXPORT_MODE_CSI2_ASYNC:
+ if (!priv->hw_data->is_ub9702) {
+ /* Map all VCs from this port to the same VC */
+ ub960_rxport_write(priv, nport, UB960_RR_CSI_VC_MAP,
+ (vc << UB960_RR_CSI_VC_MAP_SHIFT(3)) |
+ (vc << UB960_RR_CSI_VC_MAP_SHIFT(2)) |
+ (vc << UB960_RR_CSI_VC_MAP_SHIFT(1)) |
+ (vc << UB960_RR_CSI_VC_MAP_SHIFT(0)));
+ } else {
+ unsigned int i;
+
+ /* Map all VCs from this port to VC(nport) */
+ for (i = 0; i < 8; i++)
+ ub960_rxport_write(priv, nport,
+ UB960_RR_VC_ID_MAP(i),
+ nport);
+ }
+
+ break;
+ }
+
+ /* Forwarding */
+
+ fwd_ctl |= BIT(4 + nport); /* forward disable */
+
+ if (rx_data[nport].tx_port == 1)
+ fwd_ctl |= BIT(nport); /* forward to TX1 */
+ else
+ fwd_ctl &= ~BIT(nport); /* forward to TX0 */
+ }
+
+ ub960_write(priv, UB960_SR_FWD_CTL1, fwd_ctl);
+
+ return 0;
+}
+
+static void ub960_update_streaming_status(struct ub960_data *priv)
+{
+ unsigned int i;
+
+ for (i = 0; i < UB960_MAX_NPORTS; i++) {
+ if (priv->stream_enable_mask[i])
+ break;
+ }
+
+ priv->streaming = i < UB960_MAX_NPORTS;
+}
+
+static int ub960_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 source_pad,
+ u64 source_streams_mask)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct device *dev = &priv->client->dev;
+ u64 sink_streams[UB960_MAX_RX_NPORTS] = {};
+ struct v4l2_subdev_route *route;
+ unsigned int failed_port;
+ unsigned int nport;
+ int ret;
+
+ if (!priv->streaming) {
+ dev_dbg(dev, "Prepare for streaming\n");
+ ret = ub960_configure_ports_for_streaming(priv, state);
+ if (ret)
+ return ret;
+ }
+
+ /* Enable TX port if not yet enabled */
+ if (!priv->stream_enable_mask[source_pad]) {
+ ret = ub960_enable_tx_port(priv,
+ ub960_pad_to_port(priv, source_pad));
+ if (ret)
+ return ret;
+ }
+
+ priv->stream_enable_mask[source_pad] |= source_streams_mask;
+
+ /* Collect sink streams per pad which we need to enable */
+ for_each_active_route(&state->routing, route) {
+ if (route->source_pad != source_pad)
+ continue;
+
+ if (!(source_streams_mask & BIT_ULL(route->source_stream)))
+ continue;
+
+ nport = ub960_pad_to_port(priv, route->sink_pad);
+
+ sink_streams[nport] |= BIT_ULL(route->sink_stream);
+ }
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ if (!sink_streams[nport])
+ continue;
+
+ /* Enable the RX port if not yet enabled */
+ if (!priv->stream_enable_mask[nport]) {
+ ret = ub960_enable_rx_port(priv, nport);
+ if (ret) {
+ failed_port = nport;
+ goto err;
+ }
+ }
+
+ priv->stream_enable_mask[nport] |= sink_streams[nport];
+
+ dev_dbg(dev, "enable RX port %u streams %#llx\n", nport,
+ sink_streams[nport]);
+
+ ret = v4l2_subdev_enable_streams(
+ priv->rxports[nport]->source.sd,
+ priv->rxports[nport]->source.pad,
+ sink_streams[nport]);
+ if (ret) {
+ priv->stream_enable_mask[nport] &= ~sink_streams[nport];
+
+ if (!priv->stream_enable_mask[nport])
+ ub960_disable_rx_port(priv, nport);
+
+ failed_port = nport;
+ goto err;
+ }
+ }
+
+ priv->streaming = true;
+
+ return 0;
+
+err:
+ for (nport = 0; nport < failed_port; nport++) {
+ if (!sink_streams[nport])
+ continue;
+
+ dev_dbg(dev, "disable RX port %u streams %#llx\n", nport,
+ sink_streams[nport]);
+
+ ret = v4l2_subdev_disable_streams(
+ priv->rxports[nport]->source.sd,
+ priv->rxports[nport]->source.pad,
+ sink_streams[nport]);
+ if (ret)
+ dev_err(dev, "Failed to disable streams: %d\n", ret);
+
+ priv->stream_enable_mask[nport] &= ~sink_streams[nport];
+
+ /* Disable RX port if no active streams */
+ if (!priv->stream_enable_mask[nport])
+ ub960_disable_rx_port(priv, nport);
+ }
+
+ priv->stream_enable_mask[source_pad] &= ~source_streams_mask;
+
+ if (!priv->stream_enable_mask[source_pad])
+ ub960_disable_tx_port(priv,
+ ub960_pad_to_port(priv, source_pad));
+
+ ub960_update_streaming_status(priv);
+
+ return ret;
+}
+
+static int ub960_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ u32 source_pad, u64 source_streams_mask)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct device *dev = &priv->client->dev;
+ u64 sink_streams[UB960_MAX_RX_NPORTS] = {};
+ struct v4l2_subdev_route *route;
+ unsigned int nport;
+ int ret;
+
+ /* Collect sink streams per pad which we need to disable */
+ for_each_active_route(&state->routing, route) {
+ if (route->source_pad != source_pad)
+ continue;
+
+ if (!(source_streams_mask & BIT_ULL(route->source_stream)))
+ continue;
+
+ nport = ub960_pad_to_port(priv, route->sink_pad);
+
+ sink_streams[nport] |= BIT_ULL(route->sink_stream);
+ }
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ if (!sink_streams[nport])
+ continue;
+
+ dev_dbg(dev, "disable RX port %u streams %#llx\n", nport,
+ sink_streams[nport]);
+
+ ret = v4l2_subdev_disable_streams(
+ priv->rxports[nport]->source.sd,
+ priv->rxports[nport]->source.pad,
+ sink_streams[nport]);
+ if (ret)
+ dev_err(dev, "Failed to disable streams: %d\n", ret);
+
+ priv->stream_enable_mask[nport] &= ~sink_streams[nport];
+
+ /* Disable RX port if no active streams */
+ if (!priv->stream_enable_mask[nport])
+ ub960_disable_rx_port(priv, nport);
+ }
+
+ /* Disable TX port if no active streams */
+
+ priv->stream_enable_mask[source_pad] &= ~source_streams_mask;
+
+ if (!priv->stream_enable_mask[source_pad])
+ ub960_disable_tx_port(priv,
+ ub960_pad_to_port(priv, source_pad));
+
+ ub960_update_streaming_status(priv);
+
+ return 0;
+}
+
+static int _ub960_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_krouting *routing)
+{
+ static const struct v4l2_mbus_framefmt format = {
+ .width = 640,
+ .height = 480,
+ .code = MEDIA_BUS_FMT_UYVY8_1X16,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .ycbcr_enc = V4L2_YCBCR_ENC_601,
+ .quantization = V4L2_QUANTIZATION_LIM_RANGE,
+ .xfer_func = V4L2_XFER_FUNC_SRGB,
+ };
+ int ret;
+
+ /*
+ * Note: we can only support up to V4L2_FRAME_DESC_ENTRY_MAX, until
+ * frame desc is made dynamically allocated.
+ */
+
+ if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
+ return -E2BIG;
+
+ ret = v4l2_subdev_routing_validate(sd, routing,
+ V4L2_SUBDEV_ROUTING_ONLY_1_TO_1 |
+ V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX);
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ub960_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ enum v4l2_subdev_format_whence which,
+ struct v4l2_subdev_krouting *routing)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+
+ if (which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->streaming)
+ return -EBUSY;
+
+ return _ub960_set_routing(sd, state, routing);
+}
+
+static int ub960_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+ struct v4l2_mbus_frame_desc *fd)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct v4l2_subdev_route *route;
+ struct v4l2_subdev_state *state;
+ int ret = 0;
+ struct device *dev = &priv->client->dev;
+ u8 vc_map[UB960_MAX_RX_NPORTS] = {};
+
+ if (!ub960_pad_is_source(priv, pad))
+ return -EINVAL;
+
+ memset(fd, 0, sizeof(*fd));
+
+ fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+
+ state = v4l2_subdev_lock_and_get_active_state(&priv->sd);
+
+ ub960_get_vc_maps(priv, state, vc_map);
+
+ for_each_active_route(&state->routing, route) {
+ struct v4l2_mbus_frame_desc_entry *source_entry = NULL;
+ struct v4l2_mbus_frame_desc source_fd;
+ unsigned int nport;
+ unsigned int i;
+
+ if (route->source_pad != pad)
+ continue;
+
+ nport = ub960_pad_to_port(priv, route->sink_pad);
+
+ ret = v4l2_subdev_call(priv->rxports[nport]->source.sd, pad,
+ get_frame_desc,
+ priv->rxports[nport]->source.pad,
+ &source_fd);
+ if (ret) {
+ dev_err(dev,
+ "Failed to get source frame desc for pad %u\n",
+ route->sink_pad);
+ goto out_unlock;
+ }
+
+ for (i = 0; i < source_fd.num_entries; i++) {
+ if (source_fd.entry[i].stream == route->sink_stream) {
+ source_entry = &source_fd.entry[i];
+ break;
+ }
+ }
+
+ if (!source_entry) {
+ dev_err(dev,
+ "Failed to find stream from source frame desc\n");
+ ret = -EPIPE;
+ goto out_unlock;
+ }
+
+ fd->entry[fd->num_entries].stream = route->source_stream;
+ fd->entry[fd->num_entries].flags = source_entry->flags;
+ fd->entry[fd->num_entries].length = source_entry->length;
+ fd->entry[fd->num_entries].pixelcode = source_entry->pixelcode;
+
+ fd->entry[fd->num_entries].bus.csi2.vc = vc_map[nport];
+
+ if (source_fd.type == V4L2_MBUS_FRAME_DESC_TYPE_CSI2) {
+ fd->entry[fd->num_entries].bus.csi2.dt =
+ source_entry->bus.csi2.dt;
+ } else {
+ const struct ub960_format_info *ub960_fmt;
+ struct v4l2_mbus_framefmt *fmt;
+
+ fmt = v4l2_subdev_state_get_stream_format(state, pad,
+ route->source_stream);
+
+ if (!fmt) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ ub960_fmt = ub960_find_format(fmt->code);
+ if (!ub960_fmt) {
+ dev_err(dev, "Unable to find format\n");
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ fd->entry[fd->num_entries].bus.csi2.dt =
+ ub960_fmt->datatype;
+ }
+
+ fd->num_entries++;
+ }
+
+out_unlock:
+ v4l2_subdev_unlock_state(state);
+
+ return ret;
+}
+
+static int ub960_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *format)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct v4l2_mbus_framefmt *fmt;
+
+ if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE && priv->streaming)
+ return -EBUSY;
+
+ /* No transcoding, source and sink formats must match. */
+ if (ub960_pad_is_source(priv, format->pad))
+ return v4l2_subdev_get_fmt(sd, state, format);
+
+ /*
+ * Default to the first format if the requested media bus code isn't
+ * supported.
+ */
+ if (!ub960_find_format(format->format.code))
+ format->format.code = ub960_formats[0].code;
+
+ fmt = v4l2_subdev_state_get_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = format->format;
+
+ fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
+ format->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = format->format;
+
+ return 0;
+}
+
+static int ub960_init_cfg(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+
+ struct v4l2_subdev_route routes[] = {
+ {
+ .sink_pad = 0,
+ .sink_stream = 0,
+ .source_pad = priv->hw_data->num_rxports,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ };
+
+ struct v4l2_subdev_krouting routing = {
+ .num_routes = ARRAY_SIZE(routes),
+ .routes = routes,
+ };
+
+ return _ub960_set_routing(sd, state, &routing);
+}
+
+static const struct v4l2_subdev_pad_ops ub960_pad_ops = {
+ .enable_streams = ub960_enable_streams,
+ .disable_streams = ub960_disable_streams,
+
+ .set_routing = ub960_set_routing,
+ .get_frame_desc = ub960_get_frame_desc,
+
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = ub960_set_fmt,
+
+ .init_cfg = ub960_init_cfg,
+};
+
+static int ub960_log_status(struct v4l2_subdev *sd)
+{
+ struct ub960_data *priv = sd_to_ub960(sd);
+ struct device *dev = &priv->client->dev;
+ struct v4l2_subdev_state *state;
+ unsigned int nport;
+ unsigned int i;
+ u16 v16 = 0;
+ u8 v = 0;
+ u8 id[UB960_SR_FPD3_RX_ID_LEN];
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ for (i = 0; i < sizeof(id); i++)
+ ub960_read(priv, UB960_SR_FPD3_RX_ID(i), &id[i]);
+
+ dev_info(dev, "ID '%.*s'\n", (int)sizeof(id), id);
+
+ for (nport = 0; nport < priv->hw_data->num_txports; nport++) {
+ struct ub960_txport *txport = priv->txports[nport];
+
+ dev_info(dev, "TX %u\n", nport);
+
+ if (!txport) {
+ dev_info(dev, "\tNot initialized\n");
+ continue;
+ }
+
+ ub960_txport_read(priv, nport, UB960_TR_CSI_STS, &v);
+ dev_info(dev, "\tsync %u, pass %u\n", v & (u8)BIT(1),
+ v & (u8)BIT(0));
+
+ ub960_read16(priv, UB960_SR_CSI_FRAME_COUNT_HI(nport), &v16);
+ dev_info(dev, "\tframe counter %u\n", v16);
+
+ ub960_read16(priv, UB960_SR_CSI_FRAME_ERR_COUNT_HI(nport), &v16);
+ dev_info(dev, "\tframe error counter %u\n", v16);
+
+ ub960_read16(priv, UB960_SR_CSI_LINE_COUNT_HI(nport), &v16);
+ dev_info(dev, "\tline counter %u\n", v16);
+
+ ub960_read16(priv, UB960_SR_CSI_LINE_ERR_COUNT_HI(nport), &v16);
+ dev_info(dev, "\tline error counter %u\n", v16);
+ }
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+ u8 eq_level;
+ s8 strobe_pos;
+ unsigned int i;
+
+ dev_info(dev, "RX %u\n", nport);
+
+ if (!rxport) {
+ dev_info(dev, "\tNot initialized\n");
+ continue;
+ }
+
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS1, &v);
+
+ if (v & UB960_RR_RX_PORT_STS1_LOCK_STS)
+ dev_info(dev, "\tLocked\n");
+ else
+ dev_info(dev, "\tNot locked\n");
+
+ dev_info(dev, "\trx_port_sts1 %#02x\n", v);
+ ub960_rxport_read(priv, nport, UB960_RR_RX_PORT_STS2, &v);
+ dev_info(dev, "\trx_port_sts2 %#02x\n", v);
+
+ ub960_rxport_read16(priv, nport, UB960_RR_RX_FREQ_HIGH, &v16);
+ dev_info(dev, "\tlink freq %llu Hz\n", (v16 * 1000000ULL) >> 8);
+
+ ub960_rxport_read16(priv, nport, UB960_RR_RX_PAR_ERR_HI, &v16);
+ dev_info(dev, "\tparity errors %u\n", v16);
+
+ ub960_rxport_read16(priv, nport, UB960_RR_LINE_COUNT_HI, &v16);
+ dev_info(dev, "\tlines per frame %u\n", v16);
+
+ ub960_rxport_read16(priv, nport, UB960_RR_LINE_LEN_1, &v16);
+ dev_info(dev, "\tbytes per line %u\n", v16);
+
+ ub960_rxport_read(priv, nport, UB960_RR_CSI_ERR_COUNTER, &v);
+ dev_info(dev, "\tcsi_err_counter %u\n", v);
+
+ /* Strobe */
+
+ ub960_read(priv, UB960_XR_AEQ_CTL1, &v);
+
+ dev_info(dev, "\t%s strobe\n",
+ (v & UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN) ? "Adaptive" :
+ "Manual");
+
+ if (v & UB960_XR_AEQ_CTL1_AEQ_SFILTER_EN) {
+ ub960_read(priv, UB960_XR_SFILTER_CFG, &v);
+
+ dev_info(dev, "\tStrobe range [%d, %d]\n",
+ ((v >> UB960_XR_SFILTER_CFG_SFILTER_MIN_SHIFT) & 0xf) - 7,
+ ((v >> UB960_XR_SFILTER_CFG_SFILTER_MAX_SHIFT) & 0xf) - 7);
+ }
+
+ ub960_rxport_get_strobe_pos(priv, nport, &strobe_pos);
+
+ dev_info(dev, "\tStrobe pos %d\n", strobe_pos);
+
+ /* EQ */
+
+ ub960_rxport_read(priv, nport, UB960_RR_AEQ_BYPASS, &v);
+
+ dev_info(dev, "\t%s EQ\n",
+ (v & UB960_RR_AEQ_BYPASS_ENABLE) ? "Manual" :
+ "Adaptive");
+
+ if (!(v & UB960_RR_AEQ_BYPASS_ENABLE)) {
+ ub960_rxport_read(priv, nport, UB960_RR_AEQ_MIN_MAX, &v);
+
+ dev_info(dev, "\tEQ range [%u, %u]\n",
+ (v >> UB960_RR_AEQ_MIN_MAX_AEQ_FLOOR_SHIFT) & 0xf,
+ (v >> UB960_RR_AEQ_MIN_MAX_AEQ_MAX_SHIFT) & 0xf);
+ }
+
+ if (ub960_rxport_get_eq_level(priv, nport, &eq_level) == 0)
+ dev_info(dev, "\tEQ level %u\n", eq_level);
+
+ /* GPIOs */
+ for (i = 0; i < UB960_NUM_BC_GPIOS; i++) {
+ u8 ctl_reg;
+ u8 ctl_shift;
+
+ ctl_reg = UB960_RR_BC_GPIO_CTL(i / 2);
+ ctl_shift = (i % 2) * 4;
+
+ ub960_rxport_read(priv, nport, ctl_reg, &v);
+
+ dev_info(dev, "\tGPIO%u: mode %u\n", i,
+ (v >> ctl_shift) & 0xf);
+ }
+ }
+
+ v4l2_subdev_unlock_state(state);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops ub960_subdev_core_ops = {
+ .log_status = ub960_log_status,
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_ops ub960_subdev_ops = {
+ .core = &ub960_subdev_core_ops,
+ .pad = &ub960_pad_ops,
+};
+
+static const struct media_entity_operations ub960_entity_ops = {
+ .get_fwnode_pad = v4l2_subdev_get_fwnode_pad_1_to_1,
+ .link_validate = v4l2_subdev_link_validate,
+ .has_pad_interdep = v4l2_subdev_has_pad_interdep,
+};
+
+/* -----------------------------------------------------------------------------
+ * Core
+ */
+
+static irqreturn_t ub960_handle_events(int irq, void *arg)
+{
+ struct ub960_data *priv = arg;
+ unsigned int i;
+ u8 int_sts;
+ u8 fwd_sts;
+ int ret;
+
+ ret = ub960_read(priv, UB960_SR_INTERRUPT_STS, &int_sts);
+ if (ret || !int_sts)
+ return IRQ_NONE;
+
+ dev_dbg(&priv->client->dev, "INTERRUPT_STS %x\n", int_sts);
+
+ ret = ub960_read(priv, UB960_SR_FWD_STS, &fwd_sts);
+ if (ret)
+ return IRQ_NONE;
+
+ dev_dbg(&priv->client->dev, "FWD_STS %#02x\n", fwd_sts);
+
+ for (i = 0; i < priv->hw_data->num_txports; i++) {
+ if (int_sts & UB960_SR_INTERRUPT_STS_IS_CSI_TX(i))
+ ub960_csi_handle_events(priv, i);
+ }
+
+ for (i = 0; i < priv->hw_data->num_rxports; i++) {
+ if (!priv->rxports[i])
+ continue;
+
+ if (int_sts & UB960_SR_INTERRUPT_STS_IS_RX(i))
+ ub960_rxport_handle_events(priv, i);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void ub960_handler_work(struct work_struct *work)
+{
+ struct delayed_work *dwork = to_delayed_work(work);
+ struct ub960_data *priv =
+ container_of(dwork, struct ub960_data, poll_work);
+
+ ub960_handle_events(0, priv);
+
+ schedule_delayed_work(&priv->poll_work,
+ msecs_to_jiffies(UB960_POLL_TIME_MS));
+}
+
+static void ub960_txport_free_ports(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_txports; nport++) {
+ struct ub960_txport *txport = priv->txports[nport];
+
+ if (!txport)
+ continue;
+
+ kfree(txport);
+ priv->txports[nport] = NULL;
+ }
+}
+
+static void ub960_rxport_free_ports(struct ub960_data *priv)
+{
+ unsigned int nport;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ fwnode_handle_put(rxport->source.ep_fwnode);
+ fwnode_handle_put(rxport->ser.fwnode);
+
+ kfree(rxport);
+ priv->rxports[nport] = NULL;
+ }
+}
+
+static int
+ub960_parse_dt_rxport_link_properties(struct ub960_data *priv,
+ struct fwnode_handle *link_fwnode,
+ struct ub960_rxport *rxport)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int nport = rxport->nport;
+ u32 rx_mode;
+ u32 cdr_mode;
+ s32 strobe_pos;
+ u32 eq_level;
+ u32 ser_i2c_alias;
+ int ret;
+
+ cdr_mode = RXPORT_CDR_FPD3;
+
+ ret = fwnode_property_read_u32(link_fwnode, "ti,cdr-mode", &cdr_mode);
+ if (ret < 0 && ret != -EINVAL) {
+ dev_err(dev, "rx%u: failed to read '%s': %d\n", nport,
+ "ti,cdr-mode", ret);
+ return ret;
+ }
+
+ if (cdr_mode > RXPORT_CDR_LAST) {
+ dev_err(dev, "rx%u: bad 'ti,cdr-mode' %u\n", nport, cdr_mode);
+ return -EINVAL;
+ }
+
+ if (!priv->hw_data->is_fpdlink4 && cdr_mode == RXPORT_CDR_FPD4) {
+ dev_err(dev, "rx%u: FPD-Link 4 CDR not supported\n", nport);
+ return -EINVAL;
+ }
+
+ rxport->cdr_mode = cdr_mode;
+
+ ret = fwnode_property_read_u32(link_fwnode, "ti,rx-mode", &rx_mode);
+ if (ret < 0) {
+ dev_err(dev, "rx%u: failed to read '%s': %d\n", nport,
+ "ti,rx-mode", ret);
+ return ret;
+ }
+
+ if (rx_mode > RXPORT_MODE_LAST) {
+ dev_err(dev, "rx%u: bad 'ti,rx-mode' %u\n", nport, rx_mode);
+ return -EINVAL;
+ }
+
+ switch (rx_mode) {
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ case RXPORT_MODE_CSI2_ASYNC:
+ dev_err(dev, "rx%u: unsupported 'ti,rx-mode' %u\n", nport,
+ rx_mode);
+ return -EINVAL;
+ default:
+ break;
+ }
+
+ rxport->rx_mode = rx_mode;
+
+ /* EQ & Strobe related */
+
+ /* Defaults */
+ rxport->eq.manual_eq = false;
+ rxport->eq.aeq.eq_level_min = UB960_MIN_EQ_LEVEL;
+ rxport->eq.aeq.eq_level_max = UB960_MAX_EQ_LEVEL;
+
+ ret = fwnode_property_read_u32(link_fwnode, "ti,strobe-pos",
+ &strobe_pos);
+ if (ret) {
+ if (ret != -EINVAL) {
+ dev_err(dev, "rx%u: failed to read '%s': %d\n", nport,
+ "ti,strobe-pos", ret);
+ return ret;
+ }
+ } else {
+ if (strobe_pos < UB960_MIN_MANUAL_STROBE_POS ||
+ strobe_pos > UB960_MAX_MANUAL_STROBE_POS) {
+ dev_err(dev, "rx%u: illegal 'strobe-pos' value: %d\n",
+ nport, strobe_pos);
+ return -EINVAL;
+ }
+
+ /* NOTE: ignored unless global manual strobe pos is also set */
+ rxport->eq.strobe_pos = strobe_pos;
+ if (!priv->strobe.manual)
+ dev_warn(dev,
+ "rx%u: 'ti,strobe-pos' ignored as 'ti,manual-strobe' not set\n",
+ nport);
+ }
+
+ ret = fwnode_property_read_u32(link_fwnode, "ti,eq-level", &eq_level);
+ if (ret) {
+ if (ret != -EINVAL) {
+ dev_err(dev, "rx%u: failed to read '%s': %d\n", nport,
+ "ti,eq-level", ret);
+ return ret;
+ }
+ } else {
+ if (eq_level > UB960_MAX_EQ_LEVEL) {
+ dev_err(dev, "rx%u: illegal 'ti,eq-level' value: %d\n",
+ nport, eq_level);
+ return -EINVAL;
+ }
+
+ rxport->eq.manual_eq = true;
+ rxport->eq.manual.eq_level = eq_level;
+ }
+
+ ret = fwnode_property_read_u32(link_fwnode, "i2c-alias",
+ &ser_i2c_alias);
+ if (ret) {
+ dev_err(dev, "rx%u: failed to read '%s': %d\n", nport,
+ "i2c-alias", ret);
+ return ret;
+ }
+ rxport->ser.alias = ser_i2c_alias;
+
+ rxport->ser.fwnode = fwnode_get_named_child_node(link_fwnode, "serializer");
+ if (!rxport->ser.fwnode) {
+ dev_err(dev, "rx%u: missing 'serializer' node\n", nport);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ub960_parse_dt_rxport_ep_properties(struct ub960_data *priv,
+ struct fwnode_handle *ep_fwnode,
+ struct ub960_rxport *rxport)
+{
+ struct device *dev = &priv->client->dev;
+ struct v4l2_fwnode_endpoint vep = {};
+ unsigned int nport = rxport->nport;
+ bool hsync_hi;
+ bool vsync_hi;
+ int ret;
+
+ rxport->source.ep_fwnode = fwnode_graph_get_remote_endpoint(ep_fwnode);
+ if (!rxport->source.ep_fwnode) {
+ dev_err(dev, "rx%u: no remote endpoint\n", nport);
+ return -ENODEV;
+ }
+
+ /* We currently have properties only for RAW modes */
+
+ switch (rxport->rx_mode) {
+ case RXPORT_MODE_RAW10:
+ case RXPORT_MODE_RAW12_HF:
+ case RXPORT_MODE_RAW12_LF:
+ break;
+ default:
+ return 0;
+ }
+
+ vep.bus_type = V4L2_MBUS_PARALLEL;
+ ret = v4l2_fwnode_endpoint_parse(ep_fwnode, &vep);
+ if (ret) {
+ dev_err(dev, "rx%u: failed to parse endpoint data\n", nport);
+ goto err_put_source_ep_fwnode;
+ }
+
+ hsync_hi = !!(vep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH);
+ vsync_hi = !!(vep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH);
+
+ /* LineValid and FrameValid are inverse to the h/vsync active */
+ rxport->lv_fv_pol = (hsync_hi ? UB960_RR_PORT_CONFIG2_LV_POL_LOW : 0) |
+ (vsync_hi ? UB960_RR_PORT_CONFIG2_FV_POL_LOW : 0);
+
+ return 0;
+
+err_put_source_ep_fwnode:
+ fwnode_handle_put(rxport->source.ep_fwnode);
+ return ret;
+}
+
+static int ub960_parse_dt_rxport(struct ub960_data *priv, unsigned int nport,
+ struct fwnode_handle *link_fwnode,
+ struct fwnode_handle *ep_fwnode)
+{
+ static const char *vpoc_names[UB960_MAX_RX_NPORTS] = {
+ "vpoc0", "vpoc1", "vpoc2", "vpoc3"
+ };
+ struct device *dev = &priv->client->dev;
+ struct ub960_rxport *rxport;
+ int ret;
+
+ rxport = kzalloc(sizeof(*rxport), GFP_KERNEL);
+ if (!rxport)
+ return -ENOMEM;
+
+ priv->rxports[nport] = rxport;
+
+ rxport->nport = nport;
+ rxport->priv = priv;
+
+ ret = ub960_parse_dt_rxport_link_properties(priv, link_fwnode, rxport);
+ if (ret)
+ goto err_free_rxport;
+
+ rxport->vpoc = devm_regulator_get_optional(dev, vpoc_names[nport]);
+ if (IS_ERR(rxport->vpoc)) {
+ ret = PTR_ERR(rxport->vpoc);
+ if (ret == -ENODEV) {
+ rxport->vpoc = NULL;
+ } else {
+ dev_err(dev, "rx%u: failed to get VPOC supply: %d\n",
+ nport, ret);
+ goto err_put_remote_fwnode;
+ }
+ }
+
+ ret = ub960_parse_dt_rxport_ep_properties(priv, ep_fwnode, rxport);
+ if (ret)
+ goto err_put_remote_fwnode;
+
+ return 0;
+
+err_put_remote_fwnode:
+ fwnode_handle_put(rxport->ser.fwnode);
+err_free_rxport:
+ priv->rxports[nport] = NULL;
+ kfree(rxport);
+ return ret;
+}
+
+static struct fwnode_handle *
+ub960_fwnode_get_link_by_regs(struct fwnode_handle *links_fwnode,
+ unsigned int nport)
+{
+ struct fwnode_handle *link_fwnode;
+ int ret;
+
+ fwnode_for_each_child_node(links_fwnode, link_fwnode) {
+ u32 link_num;
+
+ if (!str_has_prefix(fwnode_get_name(link_fwnode), "link@"))
+ continue;
+
+ ret = fwnode_property_read_u32(link_fwnode, "reg", &link_num);
+ if (ret) {
+ fwnode_handle_put(link_fwnode);
+ return NULL;
+ }
+
+ if (nport == link_num)
+ return link_fwnode;
+ }
+
+ return NULL;
+}
+
+static int ub960_parse_dt_rxports(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ struct fwnode_handle *links_fwnode;
+ unsigned int nport;
+ int ret;
+
+ links_fwnode = fwnode_get_named_child_node(dev_fwnode(dev), "links");
+ if (!links_fwnode) {
+ dev_err(dev, "'links' node missing\n");
+ return -ENODEV;
+ }
+
+ /* Defaults, recommended by TI */
+ priv->strobe.min = 2;
+ priv->strobe.max = 3;
+
+ priv->strobe.manual = fwnode_property_read_bool(links_fwnode, "ti,manual-strobe");
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct fwnode_handle *link_fwnode;
+ struct fwnode_handle *ep_fwnode;
+
+ link_fwnode = ub960_fwnode_get_link_by_regs(links_fwnode, nport);
+ if (!link_fwnode)
+ continue;
+
+ ep_fwnode = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev),
+ nport, 0, 0);
+ if (!ep_fwnode) {
+ fwnode_handle_put(link_fwnode);
+ continue;
+ }
+
+ ret = ub960_parse_dt_rxport(priv, nport, link_fwnode,
+ ep_fwnode);
+
+ fwnode_handle_put(link_fwnode);
+ fwnode_handle_put(ep_fwnode);
+
+ if (ret) {
+ dev_err(dev, "rx%u: failed to parse RX port\n", nport);
+ goto err_put_links;
+ }
+ }
+
+ fwnode_handle_put(links_fwnode);
+
+ return 0;
+
+err_put_links:
+ fwnode_handle_put(links_fwnode);
+
+ return ret;
+}
+
+static int ub960_parse_dt_txports(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ u32 nport;
+ int ret;
+
+ for (nport = 0; nport < priv->hw_data->num_txports; nport++) {
+ unsigned int port = nport + priv->hw_data->num_rxports;
+ struct fwnode_handle *ep_fwnode;
+
+ ep_fwnode = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev),
+ port, 0, 0);
+ if (!ep_fwnode)
+ continue;
+
+ ret = ub960_parse_dt_txport(priv, ep_fwnode, nport);
+
+ fwnode_handle_put(ep_fwnode);
+
+ if (ret)
+ break;
+ }
+
+ return 0;
+}
+
+static int ub960_parse_dt(struct ub960_data *priv)
+{
+ int ret;
+
+ ret = ub960_parse_dt_rxports(priv);
+ if (ret)
+ return ret;
+
+ ret = ub960_parse_dt_txports(priv);
+ if (ret)
+ goto err_free_rxports;
+
+ return 0;
+
+err_free_rxports:
+ ub960_rxport_free_ports(priv);
+
+ return ret;
+}
+
+static int ub960_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct ub960_data *priv = sd_to_ub960(notifier->sd);
+ struct ub960_rxport *rxport = to_ub960_asd(asd)->rxport;
+ struct device *dev = &priv->client->dev;
+ u8 nport = rxport->nport;
+ unsigned int i;
+ int ret;
+
+ ret = media_entity_get_fwnode_pad(&subdev->entity,
+ rxport->source.ep_fwnode,
+ MEDIA_PAD_FL_SOURCE);
+ if (ret < 0) {
+ dev_err(dev, "Failed to find pad for %s\n", subdev->name);
+ return ret;
+ }
+
+ rxport->source.sd = subdev;
+ rxport->source.pad = ret;
+
+ ret = media_create_pad_link(&rxport->source.sd->entity,
+ rxport->source.pad, &priv->sd.entity, nport,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (ret) {
+ dev_err(dev, "Unable to link %s:%u -> %s:%u\n",
+ rxport->source.sd->name, rxport->source.pad,
+ priv->sd.name, nport);
+ return ret;
+ }
+
+ for (i = 0; i < priv->hw_data->num_rxports; i++) {
+ if (priv->rxports[i] && !priv->rxports[i]->source.sd) {
+ dev_dbg(dev, "Waiting for more subdevs to be bound\n");
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+static void ub960_notify_unbind(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct ub960_rxport *rxport = to_ub960_asd(asd)->rxport;
+
+ rxport->source.sd = NULL;
+}
+
+static const struct v4l2_async_notifier_operations ub960_notify_ops = {
+ .bound = ub960_notify_bound,
+ .unbind = ub960_notify_unbind,
+};
+
+static int ub960_v4l2_notifier_register(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int i;
+ int ret;
+
+ v4l2_async_nf_init(&priv->notifier);
+
+ for (i = 0; i < priv->hw_data->num_rxports; i++) {
+ struct ub960_rxport *rxport = priv->rxports[i];
+ struct ub960_asd *asd;
+
+ if (!rxport)
+ continue;
+
+ asd = v4l2_async_nf_add_fwnode(&priv->notifier,
+ rxport->source.ep_fwnode,
+ struct ub960_asd);
+ if (IS_ERR(asd)) {
+ dev_err(dev, "Failed to add subdev for source %u: %pe",
+ i, asd);
+ v4l2_async_nf_cleanup(&priv->notifier);
+ return PTR_ERR(asd);
+ }
+
+ asd->rxport = rxport;
+ }
+
+ priv->notifier.ops = &ub960_notify_ops;
+
+ ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier);
+ if (ret) {
+ dev_err(dev, "Failed to register subdev_notifier");
+ v4l2_async_nf_cleanup(&priv->notifier);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ub960_v4l2_notifier_unregister(struct ub960_data *priv)
+{
+ v4l2_async_nf_unregister(&priv->notifier);
+ v4l2_async_nf_cleanup(&priv->notifier);
+}
+
+static int ub960_create_subdev(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int i;
+ int ret;
+
+ v4l2_i2c_subdev_init(&priv->sd, priv->client, &ub960_subdev_ops);
+
+ v4l2_ctrl_handler_init(&priv->ctrl_handler, 1);
+ priv->sd.ctrl_handler = &priv->ctrl_handler;
+
+ v4l2_ctrl_new_int_menu(&priv->ctrl_handler, NULL, V4L2_CID_LINK_FREQ,
+ ARRAY_SIZE(priv->tx_link_freq) - 1, 0,
+ priv->tx_link_freq);
+
+ if (priv->ctrl_handler.error) {
+ ret = priv->ctrl_handler.error;
+ goto err_free_ctrl;
+ }
+
+ priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+ V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_STREAMS;
+ priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ priv->sd.entity.ops = &ub960_entity_ops;
+
+ for (i = 0; i < priv->hw_data->num_rxports + priv->hw_data->num_txports; i++) {
+ priv->pads[i].flags = ub960_pad_is_sink(priv, i) ?
+ MEDIA_PAD_FL_SINK :
+ MEDIA_PAD_FL_SOURCE;
+ }
+
+ ret = media_entity_pads_init(&priv->sd.entity,
+ priv->hw_data->num_rxports +
+ priv->hw_data->num_txports,
+ priv->pads);
+ if (ret)
+ goto err_free_ctrl;
+
+ priv->sd.state_lock = priv->sd.ctrl_handler->lock;
+
+ ret = v4l2_subdev_init_finalize(&priv->sd);
+ if (ret)
+ goto err_entity_cleanup;
+
+ ret = ub960_v4l2_notifier_register(priv);
+ if (ret) {
+ dev_err(dev, "v4l2 subdev notifier register failed: %d\n", ret);
+ goto err_subdev_cleanup;
+ }
+
+ ret = v4l2_async_register_subdev(&priv->sd);
+ if (ret) {
+ dev_err(dev, "v4l2_async_register_subdev error: %d\n", ret);
+ goto err_unreg_notif;
+ }
+
+ return 0;
+
+err_unreg_notif:
+ ub960_v4l2_notifier_unregister(priv);
+err_subdev_cleanup:
+ v4l2_subdev_cleanup(&priv->sd);
+err_entity_cleanup:
+ media_entity_cleanup(&priv->sd.entity);
+err_free_ctrl:
+ v4l2_ctrl_handler_free(&priv->ctrl_handler);
+
+ return ret;
+}
+
+static void ub960_destroy_subdev(struct ub960_data *priv)
+{
+ ub960_v4l2_notifier_unregister(priv);
+ v4l2_async_unregister_subdev(&priv->sd);
+
+ v4l2_subdev_cleanup(&priv->sd);
+
+ media_entity_cleanup(&priv->sd.entity);
+ v4l2_ctrl_handler_free(&priv->ctrl_handler);
+}
+
+static const struct regmap_config ub960_regmap_config = {
+ .name = "ds90ub960",
+
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0xff,
+
+ /*
+ * We do locking in the driver to cover the TX/RX port selection and the
+ * indirect register access.
+ */
+ .disable_locking = true,
+};
+
+static void ub960_reset(struct ub960_data *priv, bool reset_regs)
+{
+ struct device *dev = &priv->client->dev;
+ unsigned int v;
+ int ret;
+ u8 bit;
+
+ bit = reset_regs ? UB960_SR_RESET_DIGITAL_RESET1 :
+ UB960_SR_RESET_DIGITAL_RESET0;
+
+ ub960_write(priv, UB960_SR_RESET, bit);
+
+ mutex_lock(&priv->reg_lock);
+
+ ret = regmap_read_poll_timeout(priv->regmap, UB960_SR_RESET, v,
+ (v & bit) == 0, 2000, 100000);
+
+ mutex_unlock(&priv->reg_lock);
+
+ if (ret)
+ dev_err(dev, "reset failed: %d\n", ret);
+}
+
+static int ub960_get_hw_resources(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+
+ priv->regmap = devm_regmap_init_i2c(priv->client, &ub960_regmap_config);
+ if (IS_ERR(priv->regmap))
+ return PTR_ERR(priv->regmap);
+
+ priv->vddio = devm_regulator_get(dev, "vddio");
+ if (IS_ERR(priv->vddio))
+ return dev_err_probe(dev, PTR_ERR(priv->vddio),
+ "cannot get VDDIO regulator\n");
+
+ /* get power-down pin from DT */
+ priv->pd_gpio =
+ devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->pd_gpio))
+ return dev_err_probe(dev, PTR_ERR(priv->pd_gpio),
+ "Cannot get powerdown GPIO\n");
+
+ priv->refclk = devm_clk_get(dev, "refclk");
+ if (IS_ERR(priv->refclk))
+ return dev_err_probe(dev, PTR_ERR(priv->refclk),
+ "Cannot get REFCLK\n");
+
+ return 0;
+}
+
+static int ub960_enable_core_hw(struct ub960_data *priv)
+{
+ struct device *dev = &priv->client->dev;
+ u8 rev_mask;
+ int ret;
+ u8 dev_sts;
+ u8 refclk_freq;
+
+ ret = regulator_enable(priv->vddio);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to enable VDDIO regulator\n");
+
+ ret = clk_prepare_enable(priv->refclk);
+ if (ret) {
+ dev_err_probe(dev, ret, "Failed to enable refclk\n");
+ goto err_disable_vddio;
+ }
+
+ if (priv->pd_gpio) {
+ gpiod_set_value_cansleep(priv->pd_gpio, 1);
+ /* wait min 2 ms for reset to complete */
+ fsleep(2000);
+ gpiod_set_value_cansleep(priv->pd_gpio, 0);
+ /* wait min 2 ms for power up to finish */
+ fsleep(2000);
+ }
+
+ ub960_reset(priv, true);
+
+ /* Runtime check register accessibility */
+ ret = ub960_read(priv, UB960_SR_REV_MASK, &rev_mask);
+ if (ret) {
+ dev_err_probe(dev, ret, "Cannot read first register, abort\n");
+ goto err_pd_gpio;
+ }
+
+ dev_dbg(dev, "Found %s (rev/mask %#04x)\n", priv->hw_data->model,
+ rev_mask);
+
+ ret = ub960_read(priv, UB960_SR_DEVICE_STS, &dev_sts);
+ if (ret)
+ goto err_pd_gpio;
+
+ ret = ub960_read(priv, UB960_XR_REFCLK_FREQ, &refclk_freq);
+ if (ret)
+ goto err_pd_gpio;
+
+ dev_dbg(dev, "refclk valid %u freq %u MHz (clk fw freq %lu MHz)\n",
+ !!(dev_sts & BIT(4)), refclk_freq,
+ clk_get_rate(priv->refclk) / 1000000);
+
+ /* Disable all RX ports by default */
+ ret = ub960_write(priv, UB960_SR_RX_PORT_CTL, 0);
+ if (ret)
+ goto err_pd_gpio;
+
+ /* release GPIO lock */
+ if (priv->hw_data->is_ub9702) {
+ ret = ub960_update_bits(priv, UB960_SR_RESET,
+ UB960_SR_RESET_GPIO_LOCK_RELEASE,
+ UB960_SR_RESET_GPIO_LOCK_RELEASE);
+ if (ret)
+ goto err_pd_gpio;
+ }
+
+ return 0;
+
+err_pd_gpio:
+ gpiod_set_value_cansleep(priv->pd_gpio, 1);
+ clk_disable_unprepare(priv->refclk);
+err_disable_vddio:
+ regulator_disable(priv->vddio);
+
+ return ret;
+}
+
+static void ub960_disable_core_hw(struct ub960_data *priv)
+{
+ gpiod_set_value_cansleep(priv->pd_gpio, 1);
+ clk_disable_unprepare(priv->refclk);
+ regulator_disable(priv->vddio);
+}
+
+static int ub960_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ub960_data *priv;
+ unsigned int port_lock_mask;
+ unsigned int port_mask;
+ unsigned int nport;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->client = client;
+
+ priv->hw_data = device_get_match_data(dev);
+
+ mutex_init(&priv->reg_lock);
+
+ INIT_DELAYED_WORK(&priv->poll_work, ub960_handler_work);
+
+ /*
+ * Initialize these to invalid values so that the first reg writes will
+ * configure the target.
+ */
+ priv->reg_current.indirect_target = 0xff;
+ priv->reg_current.rxport = 0xff;
+ priv->reg_current.txport = 0xff;
+
+ ret = ub960_get_hw_resources(priv);
+ if (ret)
+ goto err_mutex_destroy;
+
+ ret = ub960_enable_core_hw(priv);
+ if (ret)
+ goto err_mutex_destroy;
+
+ ret = ub960_parse_dt(priv);
+ if (ret)
+ goto err_disable_core_hw;
+
+ ret = ub960_init_tx_ports(priv);
+ if (ret)
+ goto err_free_ports;
+
+ ret = ub960_rxport_enable_vpocs(priv);
+ if (ret)
+ goto err_free_ports;
+
+ ret = ub960_init_rx_ports(priv);
+ if (ret)
+ goto err_disable_vpocs;
+
+ ub960_reset(priv, false);
+
+ port_mask = 0;
+
+ for (nport = 0; nport < priv->hw_data->num_rxports; nport++) {
+ struct ub960_rxport *rxport = priv->rxports[nport];
+
+ if (!rxport)
+ continue;
+
+ port_mask |= BIT(nport);
+ }
+
+ ret = ub960_rxport_wait_locks(priv, port_mask, &port_lock_mask);
+ if (ret)
+ goto err_disable_vpocs;
+
+ if (port_mask != port_lock_mask) {
+ ret = -EIO;
+ dev_err_probe(dev, ret, "Failed to lock all RX ports\n");
+ goto err_disable_vpocs;
+ }
+
+ /*
+ * Clear any errors caused by switching the RX port settings while
+ * probing.
+ */
+ ub960_clear_rx_errors(priv);
+
+ ret = ub960_init_atr(priv);
+ if (ret)
+ goto err_disable_vpocs;
+
+ ret = ub960_rxport_add_serializers(priv);
+ if (ret)
+ goto err_uninit_atr;
+
+ ret = ub960_create_subdev(priv);
+ if (ret)
+ goto err_free_sers;
+
+ if (client->irq)
+ dev_warn(dev, "irq support not implemented, using polling\n");
+
+ schedule_delayed_work(&priv->poll_work,
+ msecs_to_jiffies(UB960_POLL_TIME_MS));
+
+ return 0;
+
+err_free_sers:
+ ub960_rxport_remove_serializers(priv);
+err_uninit_atr:
+ ub960_uninit_atr(priv);
+err_disable_vpocs:
+ ub960_rxport_disable_vpocs(priv);
+err_free_ports:
+ ub960_rxport_free_ports(priv);
+ ub960_txport_free_ports(priv);
+err_disable_core_hw:
+ ub960_disable_core_hw(priv);
+err_mutex_destroy:
+ mutex_destroy(&priv->reg_lock);
+ return ret;
+}
+
+static void ub960_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ub960_data *priv = sd_to_ub960(sd);
+
+ cancel_delayed_work_sync(&priv->poll_work);
+
+ ub960_destroy_subdev(priv);
+ ub960_rxport_remove_serializers(priv);
+ ub960_uninit_atr(priv);
+ ub960_rxport_disable_vpocs(priv);
+ ub960_rxport_free_ports(priv);
+ ub960_txport_free_ports(priv);
+ ub960_disable_core_hw(priv);
+ mutex_destroy(&priv->reg_lock);
+}
+
+static const struct ub960_hw_data ds90ub960_hw = {
+ .model = "ub960",
+ .num_rxports = 4,
+ .num_txports = 2,
+};
+
+static const struct ub960_hw_data ds90ub9702_hw = {
+ .model = "ub9702",
+ .num_rxports = 4,
+ .num_txports = 2,
+ .is_ub9702 = true,
+ .is_fpdlink4 = true,
+};
+
+static const struct i2c_device_id ub960_id[] = {
+ { "ds90ub960-q1", (kernel_ulong_t)&ds90ub960_hw },
+ { "ds90ub9702-q1", (kernel_ulong_t)&ds90ub9702_hw },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ub960_id);
+
+static const struct of_device_id ub960_dt_ids[] = {
+ { .compatible = "ti,ds90ub960-q1", .data = &ds90ub960_hw },
+ { .compatible = "ti,ds90ub9702-q1", .data = &ds90ub9702_hw },
+ {}
+};
+MODULE_DEVICE_TABLE(of, ub960_dt_ids);
+
+static struct i2c_driver ds90ub960_driver = {
+ .probe_new = ub960_probe,
+ .remove = ub960_remove,
+ .id_table = ub960_id,
+ .driver = {
+ .name = "ds90ub960",
+ .of_match_table = ub960_dt_ids,
+ },
+};
+module_i2c_driver(ds90ub960_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Texas Instruments FPD-Link III/IV Deserializers Driver");
+MODULE_AUTHOR("Luca Ceresoli <[email protected]>");
+MODULE_AUTHOR("Tomi Valkeinen <[email protected]>");
+MODULE_IMPORT_NS(I2C_ATR);
diff --git a/include/media/i2c/ds90ub9xx.h b/include/media/i2c/ds90ub9xx.h
new file mode 100644
index 000000000000..0245198469ec
--- /dev/null
+++ b/include/media/i2c/ds90ub9xx.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __MEDIA_I2C_DS90UB9XX_H__
+#define __MEDIA_I2C_DS90UB9XX_H__
+
+#include <linux/types.h>
+
+struct i2c_atr;
+
+/**
+ * struct ds90ub9xx_platform_data - platform data for FPD-Link Serializers.
+ * @port: Deserializer RX port for this Serializer
+ * @atr: I2C ATR
+ * @bc_rate: back-channel clock rate
+ */
+struct ds90ub9xx_platform_data {
+ u32 port;
+ struct i2c_atr *atr;
+ unsigned long bc_rate;
+};
+
+#endif /* __MEDIA_I2C_DS90UB9XX_H__ */
--
2.34.1