From 07eac8bf4d32bb315370245fc65a01872ab8471d Mon Sep 17 00:00:00 2001 From: Rui Miguel Silva Date: Fri, 9 Feb 2018 11:31:00 +0000 Subject: staging: media: add IMX7 mipi csi2 driver Add support to the MIPI CSI2 integrated in imx7. This will allow to use a CMOS sensor as input device for the IMX7 SoC. Signed-off-by: Rui Miguel Silva --- drivers/staging/media/imx/Kconfig | 8 + drivers/staging/media/imx/Makefile | 1 + drivers/staging/media/imx/imx7-mipi-csis.c | 1233 ++++++++++++++++++++++++++++ 3 files changed, 1242 insertions(+) create mode 100644 drivers/staging/media/imx/imx7-mipi-csis.c diff --git a/drivers/staging/media/imx/Kconfig b/drivers/staging/media/imx/Kconfig index 2be921cd0d55..111c66646f82 100644 --- a/drivers/staging/media/imx/Kconfig +++ b/drivers/staging/media/imx/Kconfig @@ -8,6 +8,14 @@ config VIDEO_IMX_MEDIA Say yes here to enable support for video4linux media controller driver for the i.MX5/6 SOC. +config VIDEO_IMX7_CSI + tristate "i.MX7 Camera Sensor Interface driver" + depends on MEDIA_CONTROLLER && VIDEO_V4L2 && ARCH_MXC + depends on VIDEO_DEV && I2C && VIDEO_V4L2_SUBDEV_API + default y + ---help--- + A video4linux camera sensor interface driver for i.MX7. + if VIDEO_IMX_MEDIA menu "i.MX5/6 Media Sub devices" diff --git a/drivers/staging/media/imx/Makefile b/drivers/staging/media/imx/Makefile index 698a4210316e..9c3ed21735f2 100644 --- a/drivers/staging/media/imx/Makefile +++ b/drivers/staging/media/imx/Makefile @@ -11,3 +11,4 @@ obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-ic.o obj-$(CONFIG_VIDEO_IMX_CSI) += imx-media-csi.o obj-$(CONFIG_VIDEO_IMX_CSI) += imx6-mipi-csi2.o +obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-mipi-csis.o diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c new file mode 100644 index 000000000000..a11220bf6128 --- /dev/null +++ b/drivers/staging/media/imx/imx7-mipi-csis.c @@ -0,0 +1,1233 @@ +// SPDX-License-Identifier: GPL +/* + * Freescale i.MX7 SoC series MIPI-CSI V3.3 receiver driver + * + * Copyright (C) 2018 Linaro Ltd + * Copyright (C) 2015-2016 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Debug level (0-2)"); + +#define CSIS_DRIVER_NAME "imx7_mipi_csis" +#define CSIS_SUBDEV_NAME CSIS_DRIVER_NAME + +#define CSIS_PAD_SINK 0 +#define CSIS_PAD_SOURCE 1 +#define CSIS_PADS_NUM 2 + +#define MIPI_CSIS_DEF_PIX_WIDTH 640 +#define MIPI_CSIS_DEF_PIX_HEIGHT 480 + +/* Register map definition */ + +/* CSIS common control */ +#define MIPI_CSIS_CMN_CTRL 0x04 +#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW BIT(16) +#define MIPI_CSIS_CMN_CTRL_INTER_MODE BIT(10) +#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW_CTRL BIT(2) +#define MIPI_CSIS_CMN_CTRL_RESET BIT(1) +#define MIPI_CSIS_CMN_CTRL_ENABLE BIT(0) + +#define MIPI_CSIS_CMN_CTRL_LANE_NR_OFFSET 8 +#define MIPI_CSIS_CMN_CTRL_LANE_NR_MASK (3 << 8) + +/* CSIS clock control */ +#define MIPI_CSIS_CLK_CTRL 0x08 +#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH3(x) (x << 28) +#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH2(x) (x << 24) +#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH1(x) (x << 20) +#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH0(x) (x << 16) +#define MIPI_CSIS_CLK_CTRL_CLKGATE_EN_MSK (0xf << 4) +#define MIPI_CSIS_CLK_CTRL_WCLK_SRC BIT(0) + +/* CSIS Interrupt mask */ +#define MIPI_CSIS_INTMSK 0x10 +#define MIPI_CSIS_INTMSK_EVEN_BEFORE BIT(31) +#define MIPI_CSIS_INTMSK_EVEN_AFTER BIT(30) +#define MIPI_CSIS_INTMSK_ODD_BEFORE BIT(29) +#define MIPI_CSIS_INTMSK_ODD_AFTER BIT(28) +#define MIPI_CSIS_INTMSK_FRAME_START BIT(24) +#define MIPI_CSIS_INTMSK_FRAME_END BIT(20) +#define MIPI_CSIS_INTMSK_ERR_SOT_HS BIT(16) +#define MIPI_CSIS_INTMSK_ERR_LOST_FS BIT(12) +#define MIPI_CSIS_INTMSK_ERR_LOST_FE BIT(8) +#define MIPI_CSIS_INTMSK_ERR_OVER BIT(4) +#define MIPI_CSIS_INTMSK_ERR_WRONG_CFG BIT(3) +#define MIPI_CSIS_INTMSK_ERR_ECC BIT(2) +#define MIPI_CSIS_INTMSK_ERR_CRC BIT(1) +#define MIPI_CSIS_INTMSK_ERR_UNKNOWN BIT(0) + +/* CSIS Interrupt source */ +#define MIPI_CSIS_INTSRC 0x14 +#define MIPI_CSIS_INTSRC_EVEN_BEFORE BIT(31) +#define MIPI_CSIS_INTSRC_EVEN_AFTER BIT(30) +#define MIPI_CSIS_INTSRC_EVEN BIT(30) +#define MIPI_CSIS_INTSRC_ODD_BEFORE BIT(29) +#define MIPI_CSIS_INTSRC_ODD_AFTER BIT(28) +#define MIPI_CSIS_INTSRC_ODD (0x3 << 28) +#define MIPI_CSIS_INTSRC_NON_IMAGE_DATA (0xf << 28) +#define MIPI_CSIS_INTSRC_FRAME_START BIT(24) +#define MIPI_CSIS_INTSRC_FRAME_END BIT(20) +#define MIPI_CSIS_INTSRC_ERR_SOT_HS BIT(16) +#define MIPI_CSIS_INTSRC_ERR_LOST_FS BIT(12) +#define MIPI_CSIS_INTSRC_ERR_LOST_FE BIT(8) +#define MIPI_CSIS_INTSRC_ERR_OVER BIT(4) +#define MIPI_CSIS_INTSRC_ERR_WRONG_CFG BIT(3) +#define MIPI_CSIS_INTSRC_ERR_ECC BIT(2) +#define MIPI_CSIS_INTSRC_ERR_CRC BIT(1) +#define MIPI_CSIS_INTSRC_ERR_UNKNOWN BIT(0) +#define MIPI_CSIS_INTSRC_ERRORS 0xfffff + +/* D-PHY status control */ +#define MIPI_CSIS_DPHYSTATUS 0x20 +#define MIPI_CSIS_DPHYSTATUS_ULPS_DAT BIT(8) +#define MIPI_CSIS_DPHYSTATUS_STOPSTATE_DAT BIT(4) +#define MIPI_CSIS_DPHYSTATUS_ULPS_CLK BIT(1) +#define MIPI_CSIS_DPHYSTATUS_STOPSTATE_CLK BIT(0) + +/* D-PHY common control */ +#define MIPI_CSIS_DPHYCTRL 0x24 +#define MIPI_CSIS_DPHYCTRL_HSS_MASK (0xff << 24) +#define MIPI_CSIS_DPHYCTRL_HSS_OFFSET 24 +#define MIPI_CSIS_DPHYCTRL_SCLKS_MASK (0x3 << 22) +#define MIPI_CSIS_DPHYCTRL_SCLKS_OFFSET 22 +#define MIPI_CSIS_DPHYCTRL_DPDN_SWAP_CLK BIT(6) +#define MIPI_CSIS_DPHYCTRL_DPDN_SWAP_DAT BIT(5) +#define MIPI_CSIS_DPHYCTRL_ENABLE_DAT BIT(1) +#define MIPI_CSIS_DPHYCTRL_ENABLE_CLK BIT(0) +#define MIPI_CSIS_DPHYCTRL_ENABLE (0x1f << 0) + +/* D-PHY Master and Slave Control register Low */ +#define MIPI_CSIS_DPHYBCTRL_L 0x30 +/* D-PHY Master and Slave Control register High */ +#define MIPI_CSIS_DPHYBCTRL_H 0x34 +/* D-PHY Slave Control register Low */ +#define MIPI_CSIS_DPHYSCTRL_L 0x38 +/* D-PHY Slave Control register High */ +#define MIPI_CSIS_DPHYSCTRL_H 0x3c + +/* ISP Configuration register */ +#define MIPI_CSIS_ISPCONFIG_CH0 0x40 +#define MIPI_CSIS_ISPCONFIG_CH1 0x50 +#define MIPI_CSIS_ISPCONFIG_CH2 0x60 +#define MIPI_CSIS_ISPCONFIG_CH3 0x70 + +#define MIPI_CSIS_ISPCFG_MEM_FULL_GAP_MSK (0xff << 24) +#define MIPI_CSIS_ISPCFG_MEM_FULL_GAP(x) (x << 24) +#define MIPI_CSIS_ISPCFG_DOUBLE_CMPNT BIT(12) +#define MIPI_CSIS_ISPCFG_ALIGN_32BIT BIT(11) +#define MIPI_CSIS_ISPCFG_FMT_YCBCR422_8BIT (0x1e << 2) +#define MIPI_CSIS_ISPCFG_FMT_RAW8 (0x2a << 2) +#define MIPI_CSIS_ISPCFG_FMT_RAW10 (0x2b << 2) +#define MIPI_CSIS_ISPCFG_FMT_RAW12 (0x2c << 2) + +/* User defined formats, x = 1...4 */ +#define MIPI_CSIS_ISPCFG_FMT_USER(x) ((0x30 + x - 1) << 2) +#define MIPI_CSIS_ISPCFG_FMT_MASK (0x3f << 2) + +/* ISP Image Resolution register */ +#define MIPI_CSIS_ISPRESOL_CH0 0x44 +#define MIPI_CSIS_ISPRESOL_CH1 0x54 +#define MIPI_CSIS_ISPRESOL_CH2 0x64 +#define MIPI_CSIS_ISPRESOL_CH3 0x74 +#define CSIS_MAX_PIX_WIDTH 0xffff +#define CSIS_MAX_PIX_HEIGHT 0xffff + +/* ISP SYNC register */ +#define MIPI_CSIS_ISPSYNC_CH0 0x48 +#define MIPI_CSIS_ISPSYNC_CH1 0x58 +#define MIPI_CSIS_ISPSYNC_CH2 0x68 +#define MIPI_CSIS_ISPSYNC_CH3 0x78 + +#define MIPI_CSIS_ISPSYNC_HSYNC_LINTV_OFFSET 18 +#define MIPI_CSIS_ISPSYNC_VSYNC_SINTV_OFFSET 12 +#define MIPI_CSIS_ISPSYNC_VSYNC_EINTV_OFFSET 0 + +/* Non-image packet data buffers */ +#define MIPI_CSIS_PKTDATA_ODD 0x2000 +#define MIPI_CSIS_PKTDATA_EVEN 0x3000 +#define MIPI_CSIS_PKTDATA_SIZE SZ_4K + +#define DEFAULT_SCLK_CSIS_FREQ 166000000UL + +enum { + ST_POWERED = 1, + ST_STREAMING = 2, + ST_SUSPENDED = 4, +}; + +struct mipi_csis_event { + u32 mask; + const char * const name; + unsigned int counter; +}; + +static const struct mipi_csis_event mipi_csis_events[] = { + /* Errors */ + { MIPI_CSIS_INTSRC_ERR_SOT_HS, "SOT Error" }, + { MIPI_CSIS_INTSRC_ERR_LOST_FS, "Lost Frame Start Error" }, + { MIPI_CSIS_INTSRC_ERR_LOST_FE, "Lost Frame End Error" }, + { MIPI_CSIS_INTSRC_ERR_OVER, "FIFO Overflow Error" }, + { MIPI_CSIS_INTSRC_ERR_ECC, "ECC Error" }, + { MIPI_CSIS_INTSRC_ERR_CRC, "CRC Error" }, + { MIPI_CSIS_INTSRC_ERR_UNKNOWN, "Unknown Error" }, + /* Non-image data receive events */ + { MIPI_CSIS_INTSRC_EVEN_BEFORE, "Non-image data before even frame" }, + { MIPI_CSIS_INTSRC_EVEN_AFTER, "Non-image data after even frame" }, + { MIPI_CSIS_INTSRC_ODD_BEFORE, "Non-image data before odd frame" }, + { MIPI_CSIS_INTSRC_ODD_AFTER, "Non-image data after odd frame" }, + /* Frame start/end */ + { MIPI_CSIS_INTSRC_FRAME_START, "Frame Start" }, + { MIPI_CSIS_INTSRC_FRAME_END, "Frame End" }, +}; + +#define MIPI_CSIS_NUM_EVENTS ARRAY_SIZE(mipi_csis_events) + +struct csis_pktbuf { + u32 *data; + unsigned int len; +}; + +struct csis_hw_reset { + struct regmap *src; + u8 req_src; + u8 rst_bit; +}; + +struct csi_state { + struct mutex lock; + struct device *dev; + struct media_pad pads[CSIS_PADS_NUM]; + struct v4l2_subdev mipi_sd; + struct v4l2_subdev *sensor_sd; + struct v4l2_device v4l2_dev; + + u8 index; + struct platform_device *pdev; + struct phy *phy; + void __iomem *regs; + struct clk *mipi_clk; + struct clk *phy_clk; + int irq; + u32 flags; + + u32 clk_frequency; + u32 hs_settle; + u32 clk_settle; + u32 num_lanes; + u32 max_num_lanes; + u8 wclk_ext; + + const struct csis_pix_format *csis_fmt; + struct v4l2_mbus_framefmt format; + + struct v4l2_ctrl_handler ctrl_handler; + + spinlock_t slock; + struct csis_pktbuf pkt_buf; + struct mipi_csis_event events[MIPI_CSIS_NUM_EVENTS]; + + struct v4l2_async_subdev asd; + struct v4l2_async_notifier subdev_notifier; + struct v4l2_async_subdev *async_subdevs[2]; + + struct csis_hw_reset hw_reset; + struct regulator *mipi_phy_regulator; +}; + +struct csis_pix_format { + unsigned int pix_width_alignment; + u32 code; + u32 fmt_reg; + u8 data_alignment; +}; + +static const struct csis_pix_format mipi_csis_formats[] = { + { + .code = MEDIA_BUS_FMT_SBGGR10_1X10, + .fmt_reg = MIPI_CSIS_ISPCFG_FMT_RAW10, + .data_alignment = 16, + }, { + .code = MEDIA_BUS_FMT_VYUY8_2X8, + .fmt_reg = MIPI_CSIS_ISPCFG_FMT_YCBCR422_8BIT, + .data_alignment = 16, + }, { + .code = MEDIA_BUS_FMT_SBGGR8_1X8, + .fmt_reg = MIPI_CSIS_ISPCFG_FMT_RAW8, + .data_alignment = 8, + }, { + .code = MEDIA_BUS_FMT_YUYV8_2X8, + .fmt_reg = MIPI_CSIS_ISPCFG_FMT_YCBCR422_8BIT, + .data_alignment = 16, + } +}; + +#define mipi_csis_write(__csis, __r, __v) writel(__v, __csis->regs + __r) +#define mipi_csis_read(__csis, __r) readl(__csis->regs + __r) + +static void dump_regs(struct csi_state *state, const char *label) +{ + u32 cfg; + u32 i; + struct { + u32 offset; + const char * const name; + } registers[] = { + { 0x04, "CTRL" }, + { 0x24, "DPHYCTRL" }, + { 0x08, "CLKCTRL" }, + { 0x20, "DPHYSTS" }, + { 0x10, "INTMSK" }, + { 0x40, "CONFIG_CH0" }, + { 0xC0, "DBG_CONFIG" }, + { 0x38, "DPHYSLAVE_L" }, + { 0x3C, "DPHYSLAVE_H" }, + }; + + v4l2_info(&state->mipi_sd, "--- %s ---\n", label); + + for (i = 0; i < ARRAY_SIZE(registers); i++) { + cfg = mipi_csis_read(state, registers[i].offset); + v4l2_info(&state->mipi_sd, "%12s: 0x%08x 0x%p\n", + registers[i].name, cfg, state->regs); + } +} + +static struct csi_state *mipi_sd_to_csi_state(struct v4l2_subdev *sdev) +{ + return container_of(sdev, struct csi_state, mipi_sd); +} + +static struct csi_state *notifier_to_mipi_dev(struct v4l2_async_notifier *n) +{ + return container_of(n, struct csi_state, subdev_notifier); +} + +static const struct csis_pix_format *find_csis_format(u32 code) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(mipi_csis_formats); i++) + if (code == mipi_csis_formats[i].code) + return &mipi_csis_formats[i]; + return NULL; +} + +static void mipi_csis_enable_interrupts(struct csi_state *state, bool on) +{ + u32 val = mipi_csis_read(state, MIPI_CSIS_INTMSK); + + if (on) + val |= 0xffffffff; + else + val &= ~0xffffffff; + mipi_csis_write(state, MIPI_CSIS_INTMSK, val); +} + +static void mipi_csis_sw_reset(struct csi_state *state) +{ + u32 val = mipi_csis_read(state, MIPI_CSIS_CMN_CTRL); + + mipi_csis_write(state, MIPI_CSIS_CMN_CTRL, + val | MIPI_CSIS_CMN_CTRL_RESET); + usleep_range(10, 20); +} + +static int mipi_csis_phy_init(struct csi_state *state) +{ + state->mipi_phy_regulator = devm_regulator_get(state->dev, "mipi-phy"); + + return regulator_set_voltage(state->mipi_phy_regulator, 1000000, + 1000000); +} + +static int mipi_csis_phy_reset(struct csi_state *state) +{ + struct device_node *np = state->dev->of_node; + struct device_node *node; + phandle phandle; + u32 out_val[3]; + int ret; + + ret = of_property_read_u32_array(np, "csis-phy-reset", out_val, 3); + if (ret) { + dev_err(state->dev, "no csis-hw-reset property found\n"); + return ret; + } + + phandle = *out_val; + + node = of_find_node_by_phandle(phandle); + if (!node) { + dev_err(state->dev, "not find src node by phandle\n"); + return PTR_ERR(node); + } + + state->hw_reset.src = syscon_node_to_regmap(node); + if (IS_ERR(state->hw_reset.src)) { + dev_err(state->dev, "failed to get src regmap\n"); + ret = PTR_ERR(state->hw_reset.src); + } + of_node_put(node); + if (ret < 0) + return ret; + + state->hw_reset.req_src = out_val[1]; + state->hw_reset.rst_bit = out_val[2]; + + /* reset mipi phy */ + regmap_update_bits(state->hw_reset.src, state->hw_reset.req_src, + 1 << state->hw_reset.rst_bit, + 1 << state->hw_reset.rst_bit); + msleep(20); + regmap_update_bits(state->hw_reset.src, state->hw_reset.req_src, + 1 << state->hw_reset.rst_bit, 0); + + return 0; +} + +static void mipi_csis_system_enable(struct csi_state *state, int on) +{ + u32 val, mask; + + val = mipi_csis_read(state, MIPI_CSIS_CMN_CTRL); + if (on) + val |= MIPI_CSIS_CMN_CTRL_ENABLE; + else + val &= ~MIPI_CSIS_CMN_CTRL_ENABLE; + mipi_csis_write(state, MIPI_CSIS_CMN_CTRL, val); + + val = mipi_csis_read(state, MIPI_CSIS_DPHYCTRL); + val &= ~MIPI_CSIS_DPHYCTRL_ENABLE; + if (on) { + mask = (1 << (state->num_lanes + 1)) - 1; + val |= (mask & MIPI_CSIS_DPHYCTRL_ENABLE); + } + mipi_csis_write(state, MIPI_CSIS_DPHYCTRL, val); +} + +/* Called with the state.lock mutex held */ +static void __mipi_csis_set_format(struct csi_state *state) +{ + struct v4l2_mbus_framefmt *mf = &state->format; + u32 val; + + /* Color format */ + val = mipi_csis_read(state, MIPI_CSIS_ISPCONFIG_CH0); + val = (val & ~MIPI_CSIS_ISPCFG_FMT_MASK) | state->csis_fmt->fmt_reg; + mipi_csis_write(state, MIPI_CSIS_ISPCONFIG_CH0, val); + + /* Pixel resolution */ + val = mf->width | (mf->height << 16); + mipi_csis_write(state, MIPI_CSIS_ISPRESOL_CH0, val); +} + +static void mipi_csis_set_hsync_settle(struct csi_state *state, int hs_settle, + int clk_settle) +{ + u32 val = mipi_csis_read(state, MIPI_CSIS_DPHYCTRL); + + val = (val & ~MIPI_CSIS_DPHYCTRL_HSS_MASK) | (hs_settle << 24) | + (clk_settle << 22); + + mipi_csis_write(state, MIPI_CSIS_DPHYCTRL, val); +} + +static void mipi_csis_set_params(struct csi_state *state) +{ + u32 val; + + val = mipi_csis_read(state, MIPI_CSIS_CMN_CTRL); + val &= ~MIPI_CSIS_CMN_CTRL_LANE_NR_MASK; + val |= (state->num_lanes - 1) << MIPI_CSIS_CMN_CTRL_LANE_NR_OFFSET; + mipi_csis_write(state, MIPI_CSIS_CMN_CTRL, val); + + __mipi_csis_set_format(state); + + mipi_csis_set_hsync_settle(state, state->hs_settle, state->clk_settle); + + val = mipi_csis_read(state, MIPI_CSIS_ISPCONFIG_CH0); + if (state->csis_fmt->data_alignment == 32) + val |= MIPI_CSIS_ISPCFG_ALIGN_32BIT; + else + val &= ~MIPI_CSIS_ISPCFG_ALIGN_32BIT; + mipi_csis_write(state, MIPI_CSIS_ISPCONFIG_CH0, val); + + val = (0 << MIPI_CSIS_ISPSYNC_HSYNC_LINTV_OFFSET) | + (0 << MIPI_CSIS_ISPSYNC_VSYNC_SINTV_OFFSET) | + (0 << MIPI_CSIS_ISPSYNC_VSYNC_EINTV_OFFSET); + mipi_csis_write(state, MIPI_CSIS_ISPSYNC_CH0, val); + + val = mipi_csis_read(state, MIPI_CSIS_CLK_CTRL); + val &= ~MIPI_CSIS_CLK_CTRL_WCLK_SRC; + if (state->wclk_ext) + val |= MIPI_CSIS_CLK_CTRL_WCLK_SRC; + val |= MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH0(15); + val &= ~MIPI_CSIS_CLK_CTRL_CLKGATE_EN_MSK; + mipi_csis_write(state, MIPI_CSIS_CLK_CTRL, val); + + mipi_csis_write(state, MIPI_CSIS_DPHYBCTRL_L, 0x1f4); + mipi_csis_write(state, MIPI_CSIS_DPHYBCTRL_H, 0); + + /* Update the shadow register. */ + val = mipi_csis_read(state, MIPI_CSIS_CMN_CTRL); + mipi_csis_write(state, MIPI_CSIS_CMN_CTRL, + val | MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW | + MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW_CTRL); +} + +static void mipi_csis_clk_enable(struct csi_state *state) +{ + clk_prepare_enable(state->mipi_clk); + clk_prepare_enable(state->phy_clk); +} + +static void mipi_csis_clk_disable(struct csi_state *state) +{ + clk_disable_unprepare(state->mipi_clk); + clk_disable_unprepare(state->phy_clk); +} + +static int mipi_csis_clk_get(struct csi_state *state) +{ + struct device *dev = &state->pdev->dev; + int ret; + + state->mipi_clk = devm_clk_get(dev, "mipi_clk"); + if (IS_ERR(state->mipi_clk)) { + dev_err(dev, "Could not get mipi csi clock\n"); + return -ENODEV; + } + + state->phy_clk = devm_clk_get(dev, "phy_clk"); + if (IS_ERR(state->phy_clk)) { + dev_err(dev, "Could not get mipi phy clock\n"); + return -ENODEV; + } + + /* Set clock rate */ + ret = clk_set_rate(state->mipi_clk, state->clk_frequency); + if (ret < 0) + dev_err(dev, "set rate failed: %d\n", ret); + + return ret; +} + +static void mipi_csis_start_stream(struct csi_state *state) +{ + mipi_csis_sw_reset(state); + mipi_csis_set_params(state); + mipi_csis_system_enable(state, true); + mipi_csis_enable_interrupts(state, true); +} + +static void mipi_csis_stop_stream(struct csi_state *state) +{ + mipi_csis_enable_interrupts(state, false); + mipi_csis_system_enable(state, false); +} + +static void mipi_csis_clear_counters(struct csi_state *state) +{ + unsigned long flags; + int i; + + spin_lock_irqsave(&state->slock, flags); + for (i = 0; i < MIPI_CSIS_NUM_EVENTS; i++) + state->events[i].counter = 0; + spin_unlock_irqrestore(&state->slock, flags); +} + +static void mipi_csis_log_counters(struct csi_state *state, bool non_errors) +{ + int i = non_errors ? MIPI_CSIS_NUM_EVENTS : MIPI_CSIS_NUM_EVENTS - 4; + unsigned long flags; + + spin_lock_irqsave(&state->slock, flags); + + for (i--; i >= 0; i--) { + if (state->events[i].counter > 0 || debug) + v4l2_info(&state->mipi_sd, "%s events: %d\n", + state->events[i].name, + state->events[i].counter); + } + spin_unlock_irqrestore(&state->slock, flags); +} + +/* + * V4L2 subdev operations + */ +static int mipi_csis_s_power(struct v4l2_subdev *mipi_sd, int on) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + struct device *dev = &state->pdev->dev; + + v4l2_subdev_call(state->sensor_sd, core, s_power, on); + + if (on) + return pm_runtime_get_sync(dev); + + return pm_runtime_put_sync(dev); +} + +static int mipi_csis_s_stream(struct v4l2_subdev *mipi_sd, int enable) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + int ret = 0; + + if (enable) { + mipi_csis_clear_counters(state); + ret = pm_runtime_get_sync(&state->pdev->dev); + if (ret && ret != 1) + return ret; + } + + mutex_lock(&state->lock); + if (enable) { + if (state->flags & ST_SUSPENDED) { + ret = -EBUSY; + goto unlock; + } + mipi_csis_start_stream(state); + ret = v4l2_subdev_call(state->sensor_sd, video, s_stream, true); + if (ret < 0) + goto unlock; + + mipi_csis_log_counters(state, true); + + state->flags |= ST_STREAMING; + } else { + v4l2_subdev_call(state->sensor_sd, video, s_stream, false); + mipi_csis_stop_stream(state); + state->flags &= ~ST_STREAMING; + if (debug > 0) + mipi_csis_log_counters(state, true); + } +unlock: + mutex_unlock(&state->lock); + if (!enable) + pm_runtime_put(&state->pdev->dev); + + return ret; +} + +static int mipi_csis_enum_mbus_code(struct v4l2_subdev *mipi_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->index >= ARRAY_SIZE(mipi_csis_formats)) + return -EINVAL; + + code->code = mipi_csis_formats[code->index].code; + + return 0; +} + +static struct csis_pix_format const *mipi_csis_try_format( + struct v4l2_subdev *mipi_sd, struct v4l2_mbus_framefmt *mf) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + struct csis_pix_format const *csis_fmt; + + csis_fmt = find_csis_format(mf->code); + if (!csis_fmt) + csis_fmt = &mipi_csis_formats[0]; + + mf->code = csis_fmt->code; + v4l_bound_align_image(&mf->width, 1, CSIS_MAX_PIX_WIDTH, + csis_fmt->pix_width_alignment, + &mf->height, 1, CSIS_MAX_PIX_HEIGHT, 1, + 0); + + state->format.code = mf->code; + state->format.width = mf->width; + state->format.height = mf->height; + + return csis_fmt; +} + +static struct v4l2_mbus_framefmt *mipi_csis_get_format(struct csi_state *state, + struct v4l2_subdev_pad_config *cfg, + enum v4l2_subdev_format_whence which) +{ + if (!cfg) + return NULL; + + if (which == V4L2_SUBDEV_FORMAT_TRY) + return v4l2_subdev_get_try_format(&state->mipi_sd, cfg, 0); + + return &state->format; +} + +static int mipi_csis_set_fmt(struct v4l2_subdev *mipi_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + struct v4l2_subdev *sensor_sd = state->sensor_sd; + struct csis_pix_format const *csis_fmt; + struct v4l2_mbus_framefmt *fmt; + + fmt = mipi_csis_get_format(state, cfg, format->which); + + mutex_lock(&state->lock); + if (fmt && format->pad == CSIS_PAD_SOURCE) { + format->format = *fmt; + goto unlock; + } + + csis_fmt = mipi_csis_try_format(mipi_sd, &format->format); + if (csis_fmt && format->which == V4L2_SUBDEV_FORMAT_ACTIVE) { + state->csis_fmt = csis_fmt; + + v4l2_subdev_call(sensor_sd, pad, set_fmt, NULL, format); + } + +unlock: + mutex_unlock(&state->lock); + + return 0; +} + +static int mipi_csis_get_fmt(struct v4l2_subdev *mipi_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + struct v4l2_subdev *sensor_sd = state->sensor_sd; + int ret; + + ret = v4l2_subdev_call(sensor_sd, pad, get_fmt, NULL, format); + if (ret) + return -EINVAL; + + return 0; +} + +static int mipi_csis_s_rx_buffer(struct v4l2_subdev *mipi_sd, void *buf, + unsigned int *size) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + unsigned long flags; + + *size = min_t(unsigned int, *size, MIPI_CSIS_PKTDATA_SIZE); + + spin_lock_irqsave(&state->slock, flags); + state->pkt_buf.data = buf; + state->pkt_buf.len = *size; + spin_unlock_irqrestore(&state->slock, flags); + + return 0; +} + +static int mipi_csis_s_parm(struct v4l2_subdev *mipi_sd, + struct v4l2_streamparm *a) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + struct v4l2_subdev *sensor_sd = state->sensor_sd; + + return v4l2_subdev_call(sensor_sd, video, s_parm, a); +} + +static int mipi_csis_g_parm(struct v4l2_subdev *mipi_sd, + struct v4l2_streamparm *a) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + struct v4l2_subdev *sensor_sd = state->sensor_sd; + + return v4l2_subdev_call(sensor_sd, video, g_parm, a); +} + +static int mipi_csis_enum_framesizes(struct v4l2_subdev *mipi_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + struct v4l2_subdev *sensor_sd = state->sensor_sd; + + return v4l2_subdev_call(sensor_sd, pad, enum_frame_size, NULL, fse); +} + +static int mipi_csis_enum_frameintervals(struct v4l2_subdev *mipi_sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_interval_enum *fie) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + struct v4l2_subdev *sensor_sd = state->sensor_sd; + + return v4l2_subdev_call(sensor_sd, pad, enum_frame_interval, NULL, fie); +} + +static int mipi_csis_log_status(struct v4l2_subdev *mipi_sd) +{ + struct csi_state *state = mipi_sd_to_csi_state(mipi_sd); + + mutex_lock(&state->lock); + mipi_csis_log_counters(state, true); + if (debug && (state->flags & ST_POWERED)) + dump_regs(state, __func__); + mutex_unlock(&state->lock); + return 0; +} + +static struct v4l2_subdev_core_ops mipi_csis_core_ops = { + .s_power = mipi_csis_s_power, + .log_status = mipi_csis_log_status, +}; + +static struct v4l2_subdev_video_ops mipi_csis_video_ops = { + .s_rx_buffer = mipi_csis_s_rx_buffer, + .s_stream = mipi_csis_s_stream, + + .s_parm = mipi_csis_s_parm, + .g_parm = mipi_csis_g_parm, +}; + +static const struct v4l2_subdev_pad_ops mipi_csis_pad_ops = { + .enum_frame_size = mipi_csis_enum_framesizes, + .enum_frame_interval = mipi_csis_enum_frameintervals, + .enum_mbus_code = mipi_csis_enum_mbus_code, + .get_fmt = mipi_csis_get_fmt, + .set_fmt = mipi_csis_set_fmt, +}; + +static struct v4l2_subdev_ops mipi_csis_subdev_ops = { + .core = &mipi_csis_core_ops, + .video = &mipi_csis_video_ops, + .pad = &mipi_csis_pad_ops, +}; + +static irqreturn_t mipi_csis_irq_handler(int irq, void *dev_id) +{ + struct csi_state *state = dev_id; + struct csis_pktbuf *pktbuf = &state->pkt_buf; + unsigned long flags; + u32 status; + u32 offset; + int i; + + status = mipi_csis_read(state, MIPI_CSIS_INTSRC); + + spin_lock_irqsave(&state->slock, flags); + + if ((status & MIPI_CSIS_INTSRC_NON_IMAGE_DATA) && pktbuf->data) { + if (status & MIPI_CSIS_INTSRC_EVEN) + offset = MIPI_CSIS_PKTDATA_EVEN; + else + offset = MIPI_CSIS_PKTDATA_ODD; + + memcpy(pktbuf->data, (u8 __force *)state->regs + offset, + pktbuf->len); + pktbuf->data = NULL; + rmb(); + } + + /* Update the event/error counters */ + if ((status & MIPI_CSIS_INTSRC_ERRORS) || 1) { + for (i = 0; i < MIPI_CSIS_NUM_EVENTS; i++) { + if (!(status & state->events[i].mask)) + continue; + state->events[i].counter++; + } + } + spin_unlock_irqrestore(&state->slock, flags); + + mipi_csis_write(state, MIPI_CSIS_INTSRC, status); + return IRQ_HANDLED; +} + +static int mipi_csis_subdev_notifier_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct csi_state *state = notifier_to_mipi_dev(notifier); + struct v4l2_async_subdev *sasd = &state->asd; + int ret; + + /* Find platform data for this sensor subdev */ + if (sasd->match.fwnode.fwnode == of_fwnode_handle(subdev->dev->of_node)) + state->sensor_sd = subdev; + + if (!state->sensor_sd) + return -EINVAL; + + v4l2_ctrl_handler_free(&state->ctrl_handler); + v4l2_ctrl_handler_init(&state->ctrl_handler, 0); + + ret = v4l2_ctrl_add_handler(&state->ctrl_handler, subdev->ctrl_handler, + NULL); + if (ret < 0) + return ret; + + /* dev_info(state->dev, "Registered sensor subdevice: %s\n", */ + /* subdev->name); */ + + return 0; +} + +static int mipi_csis_parse_dt(struct platform_device *pdev, + struct csi_state *state) +{ + struct device_node *node = pdev->dev.of_node; + + if (of_property_read_u32(node, "clock-frequency", + &state->clk_frequency)) + state->clk_frequency = DEFAULT_SCLK_CSIS_FREQ; + + if (of_property_read_u32(node, "bus-width", &state->max_num_lanes)) + return -EINVAL; + + node = of_graph_get_next_endpoint(node, NULL); + if (!node) { + dev_err(&pdev->dev, "No port node at %s\n", + pdev->dev.of_node->full_name); + return -EINVAL; + } + + /* Get MIPI CSI-2 bus configration from the endpoint node. */ + of_property_read_u32(node, "csis-hs-settle", &state->hs_settle); + + of_property_read_u32(node, "csis-clk-settle", &state->clk_settle); + state->wclk_ext = of_property_read_bool(node, "csis-wclk"); + + of_property_read_u32(node, "data-lanes", &state->num_lanes); + of_node_put(node); + + return 0; +} + +static int mipi_csis_pm_resume(struct device *dev, bool runtime); +static const struct of_device_id mipi_csis_of_match[]; + +static int mipi_csis_subdev_host(struct csi_state *state) +{ + struct device_node *parent = state->dev->of_node; + struct device_node *node, *port, *rem; + int ret; + + /* Attach sensors linked to csi receivers */ + for_each_available_child_of_node(parent, node) { + if (of_node_cmp(node->name, "port")) + continue; + + /* The csi node can have only port subnode. */ + port = of_get_next_child(node, NULL); + if (!port) + continue; + rem = of_graph_get_remote_port_parent(port); + of_node_put(port); + if (!rem) { + dev_err(state->dev, "Remote device at %s not found\n", + port->full_name); + return -EINVAL; + } + + state->asd.match_type = V4L2_ASYNC_MATCH_FWNODE; + state->asd.match.fwnode.fwnode = of_fwnode_handle(rem); + state->async_subdevs[0] = &state->asd; + + of_node_put(rem); + break; + } + + state->subdev_notifier.subdevs = state->async_subdevs; + state->subdev_notifier.num_subdevs = 1; + state->subdev_notifier.bound = mipi_csis_subdev_notifier_bound; + + ret = v4l2_async_notifier_register(&state->v4l2_dev, + &state->subdev_notifier); + if (ret) + dev_err(state->dev, "Error register async notifier\n"); + + return ret; +} + +static int mipi_csis_subdev_init(struct v4l2_subdev *mipi_sd, + struct platform_device *pdev, + const struct v4l2_subdev_ops *ops) +{ + struct csi_state *state = platform_get_drvdata(pdev); + int ret = 0; + + v4l2_subdev_init(mipi_sd, ops); + mipi_sd->owner = THIS_MODULE; + snprintf(mipi_sd->name, sizeof(mipi_sd->name), "%s.%d", + CSIS_SUBDEV_NAME, state->index); + + mipi_sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + mipi_sd->dev = &pdev->dev; + + state->csis_fmt = &mipi_csis_formats[0]; + state->format.code = mipi_csis_formats[0].code; + state->format.width = MIPI_CSIS_DEF_PIX_WIDTH; + state->format.height = MIPI_CSIS_DEF_PIX_HEIGHT; + + /* This allows to retrieve the platform device id by the host driver */ + v4l2_set_subdevdata(mipi_sd, pdev); + + ret = v4l2_async_register_subdev(mipi_sd); + if (ret < 0) + dev_err(&pdev->dev, "Async register failed: %d\n", ret); + + return ret; +} + +static int mipi_csis_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct v4l2_subdev *mipi_sd; + struct resource *mem_res; + struct csi_state *state; + int ret = -ENOMEM; + + state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); + if (!state) + return -ENOMEM; + + mutex_init(&state->lock); + spin_lock_init(&state->slock); + + state->pdev = pdev; + mipi_sd = &state->mipi_sd; + state->dev = dev; + + ret = mipi_csis_parse_dt(pdev, state); + if (ret < 0) + return ret; + + if (state->num_lanes == 0 || state->num_lanes > state->max_num_lanes) { + dev_err(dev, "Unsupported number of data lanes: %d (max. %d)\n", + state->num_lanes, state->max_num_lanes); + return -EINVAL; + } + + mipi_csis_phy_init(state); + mipi_csis_phy_reset(state); + + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + state->regs = devm_ioremap_resource(dev, mem_res); + if (IS_ERR(state->regs)) + return PTR_ERR(state->regs); + + state->irq = platform_get_irq(pdev, 0); + if (state->irq < 0) { + dev_err(dev, "Failed to get irq\n"); + return state->irq; + } + + ret = mipi_csis_clk_get(state); + if (ret < 0) + return ret; + + mipi_csis_clk_enable(state); + + ret = devm_request_irq(dev, state->irq, mipi_csis_irq_handler, + 0, dev_name(dev), state); + if (ret) { + dev_err(dev, "Interrupt request failed\n"); + goto disable_clock; + } + + /* First register a v4l2 device */ + ret = v4l2_device_register(dev, &state->v4l2_dev); + if (ret) { + v4l2_err(dev->driver, "Unable to register v4l2 device.\n"); + goto disable_clock; + } + v4l2_info(&state->v4l2_dev, "mipi csi v4l2 device registered\n"); + + /* .. and a pointer to the subdev. */ + platform_set_drvdata(pdev, state); + + v4l2_ctrl_handler_init(&state->ctrl_handler, 0); + state->mipi_sd.ctrl_handler = &state->ctrl_handler; + + ret = mipi_csis_subdev_init(&state->mipi_sd, pdev, + &mipi_csis_subdev_ops); + if (ret < 0) + goto unregister_subdev; + + state->mipi_sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE; + state->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK; + state->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&state->mipi_sd.entity, CSIS_PADS_NUM, + state->pads); + if (ret < 0) + goto unregister_subdev; + + memcpy(state->events, mipi_csis_events, sizeof(state->events)); + + /* subdev host register */ + ret = mipi_csis_subdev_host(state); + if (ret < 0) + goto unregister_all; + + pm_runtime_enable(dev); + if (!pm_runtime_enabled(dev)) { + ret = mipi_csis_pm_resume(dev, true); + if (ret < 0) + goto unregister_all; + } + + dev_info(&pdev->dev, "lanes: %d, hs_settle: %d, clk_settle: %d, wclk: %d, freq: %u\n", + state->num_lanes, state->hs_settle, state->clk_settle, + state->wclk_ext, state->clk_frequency); + return 0; + +unregister_all: + v4l2_async_notifier_unregister(&state->subdev_notifier); + v4l2_device_unregister(&state->v4l2_dev); + media_entity_cleanup(&state->mipi_sd.entity); +unregister_subdev: + v4l2_async_unregister_subdev(&state->mipi_sd); +disable_clock: + mipi_csis_clk_disable(state); + return ret; +} + +static int mipi_csis_pm_suspend(struct device *dev, bool runtime) +{ + struct platform_device *pdev = to_platform_device(dev); + struct csi_state *state = platform_get_drvdata(pdev); + int ret = 0; + + mutex_lock(&state->lock); + if (state->flags & ST_POWERED) { + mipi_csis_stop_stream(state); + ret = regulator_disable(state->mipi_phy_regulator); + if (ret) + goto unlock; + mipi_csis_clk_disable(state); + state->flags &= ~ST_POWERED; + if (!runtime) + state->flags |= ST_SUSPENDED; + } + + unlock: + mutex_unlock(&state->lock); + return ret ? -EAGAIN : 0; +} + +static int mipi_csis_pm_resume(struct device *dev, bool runtime) +{ + struct platform_device *pdev = to_platform_device(dev); + struct csi_state *state = platform_get_drvdata(pdev); + int ret = 0; + + mutex_lock(&state->lock); + if (!runtime && !(state->flags & ST_SUSPENDED)) + goto unlock; + + if (!(state->flags & ST_POWERED)) { + ret = regulator_enable(state->mipi_phy_regulator); + if (ret) + goto unlock; + + state->flags |= ST_POWERED; + mipi_csis_clk_enable(state); + } + if (state->flags & ST_STREAMING) + mipi_csis_start_stream(state); + + state->flags &= ~ST_SUSPENDED; + + unlock: + mutex_unlock(&state->lock); + return ret ? -EAGAIN : 0; +} + +#ifdef CONFIG_PM_SLEEP +static int mipi_csis_suspend(struct device *dev) +{ + return mipi_csis_pm_suspend(dev, false); +} + +static int mipi_csis_resume(struct device *dev) +{ + return mipi_csis_pm_resume(dev, false); +} +#endif + +static int mipi_csis_runtime_suspend(struct device *dev) +{ + return mipi_csis_pm_suspend(dev, true); +} + +static int mipi_csis_runtime_resume(struct device *dev) +{ + return mipi_csis_pm_resume(dev, true); +} + +static int mipi_csis_remove(struct platform_device *pdev) +{ + struct csi_state *state = platform_get_drvdata(pdev); + + v4l2_async_unregister_subdev(&state->mipi_sd); + v4l2_async_notifier_unregister(&state->subdev_notifier); + v4l2_device_unregister(&state->v4l2_dev); + + pm_runtime_disable(&pdev->dev); + mipi_csis_pm_suspend(&pdev->dev, true); + mipi_csis_clk_disable(state); + media_entity_cleanup(&state->mipi_sd.entity); + pm_runtime_set_suspended(&pdev->dev); + + return 0; +} + +static const struct dev_pm_ops mipi_csis_pm_ops = { + SET_RUNTIME_PM_OPS(mipi_csis_runtime_suspend, mipi_csis_runtime_resume, + NULL) + SET_SYSTEM_SLEEP_PM_OPS(mipi_csis_suspend, mipi_csis_resume) +}; + +static const struct of_device_id mipi_csis_of_match[] = { + { .compatible = "fsl,imx7-mipi-csi2", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, mipi_csis_of_match); + +static struct platform_driver mipi_csis_driver = { + .probe = mipi_csis_probe, + .remove = mipi_csis_remove, + .driver = { + .of_match_table = mipi_csis_of_match, + .name = CSIS_DRIVER_NAME, + .owner = THIS_MODULE, + .pm = &mipi_csis_pm_ops, + }, +}; + +module_platform_driver(mipi_csis_driver); + +MODULE_DESCRIPTION("i.MX7 MIPI CSI-2 Receiver driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:imx-csis"); -- cgit v1.2.3