// SPDX-License-Identifier: GPL-2.0-only /* * TI CAL camera interface driver * * Copyright (c) 2015 Texas Instruments Inc. * Benoit Parrot, */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cal_regs.h" #define CAL_MODULE_NAME "cal" MODULE_DESCRIPTION("TI CAL driver"); MODULE_AUTHOR("Benoit Parrot, "); MODULE_LICENSE("GPL v2"); MODULE_VERSION("0.1.0"); static unsigned video_nr = -1; module_param(video_nr, uint, 0644); MODULE_PARM_DESC(video_nr, "videoX start number, -1 is autodetect"); static unsigned debug; module_param(debug, uint, 0644); MODULE_PARM_DESC(debug, "activates debug info"); #define cal_dbg(level, cal, fmt, arg...) \ do { \ if (debug >= (level)) \ dev_printk(KERN_DEBUG, (cal)->dev, fmt, ##arg); \ } while (0) #define cal_info(cal, fmt, arg...) \ dev_info((cal)->dev, fmt, ##arg) #define cal_err(cal, fmt, arg...) \ dev_err((cal)->dev, fmt, ##arg) #define ctx_dbg(level, ctx, fmt, arg...) \ cal_dbg(level, (ctx)->cal, "ctx%u: " fmt, (ctx)->index, ##arg) #define ctx_info(ctx, fmt, arg...) \ cal_info((ctx)->cal, "ctx%u: " fmt, (ctx)->index, ##arg) #define ctx_err(ctx, fmt, arg...) \ cal_err((ctx)->cal, "ctx%u: " fmt, (ctx)->index, ##arg) #define phy_dbg(level, phy, fmt, arg...) \ cal_dbg(level, (phy)->cal, "phy%u: " fmt, (phy)->instance, ##arg) #define phy_info(phy, fmt, arg...) \ cal_info((phy)->cal, "phy%u: " fmt, (phy)->instance, ##arg) #define phy_err(phy, fmt, arg...) \ cal_err((phy)->cal, "phy%u: " fmt, (phy)->instance, ##arg) #define CAL_NUM_CONTEXT 2 #define CAL_NUM_CSI2_PORTS 2 #define MAX_WIDTH_BYTES (8192 * 8) #define MAX_HEIGHT_LINES 16383 /* ------------------------------------------------------------------ * Format Handling * ------------------------------------------------------------------ */ struct cal_fmt { u32 fourcc; u32 code; /* Bits per pixel */ u8 bpp; }; static const struct cal_fmt cal_formats[] = { { .fourcc = V4L2_PIX_FMT_YUYV, .code = MEDIA_BUS_FMT_YUYV8_2X8, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_UYVY, .code = MEDIA_BUS_FMT_UYVY8_2X8, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_YVYU, .code = MEDIA_BUS_FMT_YVYU8_2X8, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_VYUY, .code = MEDIA_BUS_FMT_VYUY8_2X8, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */ .code = MEDIA_BUS_FMT_RGB565_2X8_LE, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */ .code = MEDIA_BUS_FMT_RGB565_2X8_BE, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */ .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */ .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE, .bpp = 16, }, { .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */ .code = MEDIA_BUS_FMT_RGB888_2X12_LE, .bpp = 24, }, { .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */ .code = MEDIA_BUS_FMT_RGB888_2X12_BE, .bpp = 24, }, { .fourcc = V4L2_PIX_FMT_RGB32, /* argb */ .code = MEDIA_BUS_FMT_ARGB8888_1X32, .bpp = 32, }, { .fourcc = V4L2_PIX_FMT_SBGGR8, .code = MEDIA_BUS_FMT_SBGGR8_1X8, .bpp = 8, }, { .fourcc = V4L2_PIX_FMT_SGBRG8, .code = MEDIA_BUS_FMT_SGBRG8_1X8, .bpp = 8, }, { .fourcc = V4L2_PIX_FMT_SGRBG8, .code = MEDIA_BUS_FMT_SGRBG8_1X8, .bpp = 8, }, { .fourcc = V4L2_PIX_FMT_SRGGB8, .code = MEDIA_BUS_FMT_SRGGB8_1X8, .bpp = 8, }, { .fourcc = V4L2_PIX_FMT_SBGGR10, .code = MEDIA_BUS_FMT_SBGGR10_1X10, .bpp = 10, }, { .fourcc = V4L2_PIX_FMT_SGBRG10, .code = MEDIA_BUS_FMT_SGBRG10_1X10, .bpp = 10, }, { .fourcc = V4L2_PIX_FMT_SGRBG10, .code = MEDIA_BUS_FMT_SGRBG10_1X10, .bpp = 10, }, { .fourcc = V4L2_PIX_FMT_SRGGB10, .code = MEDIA_BUS_FMT_SRGGB10_1X10, .bpp = 10, }, { .fourcc = V4L2_PIX_FMT_SBGGR12, .code = MEDIA_BUS_FMT_SBGGR12_1X12, .bpp = 12, }, { .fourcc = V4L2_PIX_FMT_SGBRG12, .code = MEDIA_BUS_FMT_SGBRG12_1X12, .bpp = 12, }, { .fourcc = V4L2_PIX_FMT_SGRBG12, .code = MEDIA_BUS_FMT_SGRBG12_1X12, .bpp = 12, }, { .fourcc = V4L2_PIX_FMT_SRGGB12, .code = MEDIA_BUS_FMT_SRGGB12_1X12, .bpp = 12, }, }; /* Print Four-character-code (FOURCC) */ static char *fourcc_to_str(u32 fmt) { static char code[5]; code[0] = (unsigned char)(fmt & 0xff); code[1] = (unsigned char)((fmt >> 8) & 0xff); code[2] = (unsigned char)((fmt >> 16) & 0xff); code[3] = (unsigned char)((fmt >> 24) & 0xff); code[4] = '\0'; return code; } /* ------------------------------------------------------------------ * Driver Structures * ------------------------------------------------------------------ */ /* buffer for one video frame */ struct cal_buffer { /* common v4l buffer stuff -- must be first */ struct vb2_v4l2_buffer vb; struct list_head list; }; struct cal_dmaqueue { struct list_head active; }; /* CTRL_CORE_CAMERRX_CONTROL register field id */ enum cal_camerarx_field { F_CTRLCLKEN, F_CAMMODE, F_LANEENABLE, F_CSI_MODE, F_MAX_FIELDS, }; struct cal_camerarx_data { struct { unsigned int lsb; unsigned int msb; } fields[F_MAX_FIELDS]; unsigned int num_lanes; }; struct cal_data { const struct cal_camerarx_data *camerarx; unsigned int num_csi2_phy; unsigned int flags; }; /* * The Camera Adaptation Layer (CAL) module is paired with one or more complex * I/O PHYs (CAMERARX). It contains multiple instances of CSI-2, processing and * DMA contexts. * * The cal_dev structure represents the whole subsystem, including the CAL and * the CAMERARX instances. Instances of struct cal_dev are named cal through the * driver. * * The cal_camerarx structure represents one CAMERARX instance. Instances of * cal_camerarx are named phy through the driver. * * The cal_ctx structure represents the combination of one CSI-2 context, one * processing context and one DMA context. Instance of struct cal_ctx are named * ctx through the driver. */ struct cal_camerarx { void __iomem *base; struct resource *res; struct device *dev; struct regmap_field *fields[F_MAX_FIELDS]; struct cal_dev *cal; unsigned int instance; struct v4l2_fwnode_endpoint endpoint; struct device_node *sensor_node; struct v4l2_subdev *sensor; unsigned int external_rate; }; struct cal_dev { struct clk *fclk; int irq; void __iomem *base; struct resource *res; struct device *dev; const struct cal_data *data; u32 revision; /* Control Module handle */ struct regmap *syscon_camerrx; u32 syscon_camerrx_offset; /* Camera Core Module handle */ struct cal_camerarx *phy[CAL_NUM_CSI2_PORTS]; struct cal_ctx *ctx[CAL_NUM_CONTEXT]; struct media_device mdev; struct v4l2_device v4l2_dev; struct v4l2_async_notifier notifier; }; /* * There is one cal_ctx structure for each camera core context. */ struct cal_ctx { struct v4l2_ctrl_handler ctrl_handler; struct video_device vdev; struct media_pad pad; struct cal_dev *cal; struct cal_camerarx *phy; /* v4l2_ioctl mutex */ struct mutex mutex; /* v4l2 buffers lock */ spinlock_t slock; struct cal_dmaqueue vidq; /* video capture */ const struct cal_fmt *fmt; /* Used to store current pixel format */ struct v4l2_format v_fmt; /* Used to store current mbus frame format */ struct v4l2_mbus_framefmt m_fmt; /* Current subdev enumerated format */ const struct cal_fmt **active_fmt; unsigned int num_active_fmt; unsigned int sequence; struct vb2_queue vb_vidq; unsigned int index; unsigned int cport; /* Pointer pointing to current v4l2_buffer */ struct cal_buffer *cur_frm; /* Pointer pointing to next v4l2_buffer */ struct cal_buffer *next_frm; bool dma_act; }; /* ------------------------------------------------------------------ * Platform Data * ------------------------------------------------------------------ */ static const struct cal_camerarx_data dra72x_cal_camerarx[] = { { .fields = { [F_CTRLCLKEN] = { 10, 10 }, [F_CAMMODE] = { 11, 12 }, [F_LANEENABLE] = { 13, 16 }, [F_CSI_MODE] = { 17, 17 }, }, .num_lanes = 4, }, { .fields = { [F_CTRLCLKEN] = { 0, 0 }, [F_CAMMODE] = { 1, 2 }, [F_LANEENABLE] = { 3, 4 }, [F_CSI_MODE] = { 5, 5 }, }, .num_lanes = 2, }, }; static const struct cal_data dra72x_cal_data = { .camerarx = dra72x_cal_camerarx, .num_csi2_phy = ARRAY_SIZE(dra72x_cal_camerarx), }; static const struct cal_data dra72x_es1_cal_data = { .camerarx = dra72x_cal_camerarx, .num_csi2_phy = ARRAY_SIZE(dra72x_cal_camerarx), .flags = DRA72_CAL_PRE_ES2_LDO_DISABLE, }; static const struct cal_camerarx_data dra76x_cal_csi_phy[] = { { .fields = { [F_CTRLCLKEN] = { 8, 8 }, [F_CAMMODE] = { 9, 10 }, [F_CSI_MODE] = { 11, 11 }, [F_LANEENABLE] = { 27, 31 }, }, .num_lanes = 5, }, { .fields = { [F_CTRLCLKEN] = { 0, 0 }, [F_CAMMODE] = { 1, 2 }, [F_CSI_MODE] = { 3, 3 }, [F_LANEENABLE] = { 24, 26 }, }, .num_lanes = 3, }, }; static const struct cal_data dra76x_cal_data = { .camerarx = dra76x_cal_csi_phy, .num_csi2_phy = ARRAY_SIZE(dra76x_cal_csi_phy), }; static const struct cal_camerarx_data am654_cal_csi_phy[] = { { .fields = { [F_CTRLCLKEN] = { 15, 15 }, [F_CAMMODE] = { 24, 25 }, [F_LANEENABLE] = { 0, 4 }, }, .num_lanes = 5, }, }; static const struct cal_data am654_cal_data = { .camerarx = am654_cal_csi_phy, .num_csi2_phy = ARRAY_SIZE(am654_cal_csi_phy), }; /* ------------------------------------------------------------------ * I/O Register Accessors * ------------------------------------------------------------------ */ #define reg_read(dev, offset) ioread32(dev->base + offset) #define reg_write(dev, offset, val) iowrite32(val, dev->base + offset) static inline u32 reg_read_field(struct cal_dev *cal, u32 offset, u32 mask) { return FIELD_GET(mask, reg_read(cal, offset)); } static inline void reg_write_field(struct cal_dev *cal, u32 offset, u32 value, u32 mask) { u32 val = reg_read(cal, offset); val &= ~mask; val |= FIELD_PREP(mask, value); reg_write(cal, offset, val); } static inline void set_field(u32 *valp, u32 field, u32 mask) { u32 val = *valp; val &= ~mask; val |= (field << __ffs(mask)) & mask; *valp = val; } static void cal_quickdump_regs(struct cal_dev *cal) { unsigned int i; cal_info(cal, "CAL Registers @ 0x%pa:\n", &cal->res->start); print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 4, (__force const void *)cal->base, resource_size(cal->res), false); for (i = 0; i < ARRAY_SIZE(cal->phy); ++i) { struct cal_camerarx *phy = cal->phy[i]; if (!phy) continue; cal_info(cal, "CSI2 Core %u Registers @ %pa:\n", i, &phy->res->start); print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 4, (__force const void *)phy->base, resource_size(phy->res), false); } } /* ------------------------------------------------------------------ * CAMERARX Management * ------------------------------------------------------------------ */ static int cal_camerarx_get_external_info(struct cal_camerarx *phy) { struct v4l2_ctrl *ctrl; if (!phy->sensor) return -ENODEV; ctrl = v4l2_ctrl_find(phy->sensor->ctrl_handler, V4L2_CID_PIXEL_RATE); if (!ctrl) { phy_err(phy, "no pixel rate control in subdev: %s\n", phy->sensor->name); return -EPIPE; } phy->external_rate = v4l2_ctrl_g_ctrl_int64(ctrl); phy_dbg(3, phy, "sensor Pixel Rate: %u\n", phy->external_rate); return 0; } static void cal_camerarx_lane_config(struct cal_camerarx *phy) { u32 val = reg_read(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance)); u32 lane_mask = CAL_CSI2_COMPLEXIO_CFG_CLOCK_POSITION_MASK; u32 polarity_mask = CAL_CSI2_COMPLEXIO_CFG_CLOCK_POL_MASK; struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 = &phy->endpoint.bus.mipi_csi2; int lane; set_field(&val, mipi_csi2->clock_lane + 1, lane_mask); set_field(&val, mipi_csi2->lane_polarities[0], polarity_mask); for (lane = 0; lane < mipi_csi2->num_data_lanes; lane++) { /* * Every lane are one nibble apart starting with the * clock followed by the data lanes so shift masks by 4. */ lane_mask <<= 4; polarity_mask <<= 4; set_field(&val, mipi_csi2->data_lanes[lane] + 1, lane_mask); set_field(&val, mipi_csi2->lane_polarities[lane + 1], polarity_mask); } reg_write(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), val); phy_dbg(3, phy, "CAL_CSI2_COMPLEXIO_CFG(%d) = 0x%08x\n", phy->instance, val); } static void cal_camerarx_enable(struct cal_camerarx *phy) { u32 num_lanes = phy->cal->data->camerarx[phy->instance].num_lanes; regmap_field_write(phy->fields[F_CAMMODE], 0); /* Always enable all lanes at the phy control level */ regmap_field_write(phy->fields[F_LANEENABLE], (1 << num_lanes) - 1); /* F_CSI_MODE is not present on every architecture */ if (phy->fields[F_CSI_MODE]) regmap_field_write(phy->fields[F_CSI_MODE], 1); regmap_field_write(phy->fields[F_CTRLCLKEN], 1); } static void cal_camerarx_disable(struct cal_camerarx *phy) { regmap_field_write(phy->fields[F_CTRLCLKEN], 0); } /* * TCLK values are OK at their reset values */ #define TCLK_TERM 0 #define TCLK_MISS 1 #define TCLK_SETTLE 14 static void cal_camerarx_config(struct cal_camerarx *phy, const struct cal_fmt *fmt) { unsigned int reg0, reg1; unsigned int ths_term, ths_settle; unsigned int csi2_ddrclk_khz; struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 = &phy->endpoint.bus.mipi_csi2; u32 num_lanes = mipi_csi2->num_data_lanes; /* DPHY timing configuration */ /* CSI-2 is DDR and we only count used lanes. */ csi2_ddrclk_khz = phy->external_rate / 1000 / (2 * num_lanes) * fmt->bpp; phy_dbg(1, phy, "csi2_ddrclk_khz: %d\n", csi2_ddrclk_khz); /* THS_TERM: Programmed value = floor(20 ns/DDRClk period) */ ths_term = 20 * csi2_ddrclk_khz / 1000000; phy_dbg(1, phy, "ths_term: %d (0x%02x)\n", ths_term, ths_term); /* THS_SETTLE: Programmed value = floor(105 ns/DDRClk period) + 4 */ ths_settle = (105 * csi2_ddrclk_khz / 1000000) + 4; phy_dbg(1, phy, "ths_settle: %d (0x%02x)\n", ths_settle, ths_settle); reg0 = reg_read(phy, CAL_CSI2_PHY_REG0); set_field(®0, CAL_CSI2_PHY_REG0_HSCLOCKCONFIG_DISABLE, CAL_CSI2_PHY_REG0_HSCLOCKCONFIG_MASK); set_field(®0, ths_term, CAL_CSI2_PHY_REG0_THS_TERM_MASK); set_field(®0, ths_settle, CAL_CSI2_PHY_REG0_THS_SETTLE_MASK); phy_dbg(1, phy, "CSI2_%d_REG0 = 0x%08x\n", phy->instance, reg0); reg_write(phy, CAL_CSI2_PHY_REG0, reg0); reg1 = reg_read(phy, CAL_CSI2_PHY_REG1); set_field(®1, TCLK_TERM, CAL_CSI2_PHY_REG1_TCLK_TERM_MASK); set_field(®1, 0xb8, CAL_CSI2_PHY_REG1_DPHY_HS_SYNC_PATTERN_MASK); set_field(®1, TCLK_MISS, CAL_CSI2_PHY_REG1_CTRLCLK_DIV_FACTOR_MASK); set_field(®1, TCLK_SETTLE, CAL_CSI2_PHY_REG1_TCLK_SETTLE_MASK); phy_dbg(1, phy, "CSI2_%d_REG1 = 0x%08x\n", phy->instance, reg1); reg_write(phy, CAL_CSI2_PHY_REG1, reg1); } static void cal_camerarx_power(struct cal_camerarx *phy, bool enable) { u32 target_state; unsigned int i; target_state = enable ? CAL_CSI2_COMPLEXIO_CFG_PWR_CMD_STATE_ON : CAL_CSI2_COMPLEXIO_CFG_PWR_CMD_STATE_OFF; reg_write_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), target_state, CAL_CSI2_COMPLEXIO_CFG_PWR_CMD_MASK); for (i = 0; i < 10; i++) { u32 current_state; current_state = reg_read_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), CAL_CSI2_COMPLEXIO_CFG_PWR_STATUS_MASK); if (current_state == target_state) break; usleep_range(1000, 1100); } if (i == 10) phy_err(phy, "Failed to power %s complexio\n", enable ? "up" : "down"); } static void cal_camerarx_wait_reset(struct cal_camerarx *phy) { unsigned long timeout; timeout = jiffies + msecs_to_jiffies(750); while (time_before(jiffies, timeout)) { if (reg_read_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_MASK) == CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_RESETCOMPLETED) break; usleep_range(500, 5000); } if (reg_read_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_MASK) != CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_RESETCOMPLETED) phy_err(phy, "Timeout waiting for Complex IO reset done\n"); } static void cal_camerarx_wait_stop_state(struct cal_camerarx *phy) { unsigned long timeout; timeout = jiffies + msecs_to_jiffies(750); while (time_before(jiffies, timeout)) { if (reg_read_field(phy->cal, CAL_CSI2_TIMING(phy->instance), CAL_CSI2_TIMING_FORCE_RX_MODE_IO1_MASK) == 0) break; usleep_range(500, 5000); } if (reg_read_field(phy->cal, CAL_CSI2_TIMING(phy->instance), CAL_CSI2_TIMING_FORCE_RX_MODE_IO1_MASK) != 0) phy_err(phy, "Timeout waiting for stop state\n"); } static void cal_camerarx_wait_ready(struct cal_camerarx *phy) { /* Steps * 2. Wait for completion of reset * Note if the external sensor is not sending byte clock, * the reset will timeout * 4.Force FORCERXMODE * G. Wait for all enabled lane to reach stop state * H. Disable pull down using pad control */ /* 2. Wait for reset completion */ cal_camerarx_wait_reset(phy); /* 4. G. Wait for all enabled lane to reach stop state */ cal_camerarx_wait_stop_state(phy); phy_dbg(1, phy, "CSI2_%d_REG1 = 0x%08x (Bit(31,28) should be set!)\n", phy->instance, reg_read(phy, CAL_CSI2_PHY_REG1)); } static void cal_camerarx_init(struct cal_camerarx *phy, const struct cal_fmt *fmt) { u32 val; u32 sscounter; /* Steps * 1. Configure D-PHY mode and enable required lanes * 2. Reset complex IO - Wait for completion of reset * Note if the external sensor is not sending byte clock, * the reset will timeout * 3 Program Stop States * A. Program THS_TERM, THS_SETTLE, etc... Timings parameters * in terms of DDR clock periods * B. Enable stop state transition timeouts * 4.Force FORCERXMODE * D. Enable pull down using pad control * E. Power up PHY * F. Wait for power up completion * G. Wait for all enabled lane to reach stop state * H. Disable pull down using pad control */ /* 1. Configure D-PHY mode and enable required lanes */ cal_camerarx_enable(phy); /* 2. Reset complex IO - Do not wait for reset completion */ reg_write_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_OPERATIONAL, CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_MASK); phy_dbg(3, phy, "CAL_CSI2_COMPLEXIO_CFG(%d) = 0x%08x De-assert Complex IO Reset\n", phy->instance, reg_read(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance))); /* Dummy read to allow SCP reset to complete */ reg_read(phy, CAL_CSI2_PHY_REG0); /* 3.A. Program Phy Timing Parameters */ cal_camerarx_config(phy, fmt); /* 3.B. Program Stop States */ /* * The stop-state-counter is based on fclk cycles, and we always use * the x16 and x4 settings, so stop-state-timeout = * fclk-cycle * 16 * 4 * counter. * * Stop-state-timeout must be more than 100us as per CSI2 spec, so we * calculate a timeout that's 100us (rounding up). */ sscounter = DIV_ROUND_UP(clk_get_rate(phy->cal->fclk), 10000 * 16 * 4); val = reg_read(phy->cal, CAL_CSI2_TIMING(phy->instance)); set_field(&val, 1, CAL_CSI2_TIMING_STOP_STATE_X16_IO1_MASK); set_field(&val, 1, CAL_CSI2_TIMING_STOP_STATE_X4_IO1_MASK); set_field(&val, sscounter, CAL_CSI2_TIMING_STOP_STATE_COUNTER_IO1_MASK); reg_write(phy->cal, CAL_CSI2_TIMING(phy->instance), val); phy_dbg(3, phy, "CAL_CSI2_TIMING(%d) = 0x%08x Stop States\n", phy->instance, reg_read(phy->cal, CAL_CSI2_TIMING(phy->instance))); /* 4. Force FORCERXMODE */ reg_write_field(phy->cal, CAL_CSI2_TIMING(phy->instance), 1, CAL_CSI2_TIMING_FORCE_RX_MODE_IO1_MASK); phy_dbg(3, phy, "CAL_CSI2_TIMING(%d) = 0x%08x Force RXMODE\n", phy->instance, reg_read(phy->cal, CAL_CSI2_TIMING(phy->instance))); /* E. Power up the PHY using the complex IO */ cal_camerarx_power(phy, true); } static void cal_camerarx_deinit(struct cal_camerarx *phy) { unsigned int i; cal_camerarx_power(phy, false); /* Assert Comple IO Reset */ reg_write_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL, CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_MASK); /* Wait for power down completion */ for (i = 0; i < 10; i++) { if (reg_read_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_MASK) == CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_RESETONGOING) break; usleep_range(1000, 1100); } phy_dbg(3, phy, "CAL_CSI2_COMPLEXIO_CFG(%d) = 0x%08x Complex IO in Reset (%d) %s\n", phy->instance, reg_read(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance)), i, (i >= 10) ? "(timeout)" : ""); /* Disable the phy */ cal_camerarx_disable(phy); } /* * Errata i913: CSI2 LDO Needs to be disabled when module is powered on * * Enabling CSI2 LDO shorts it to core supply. It is crucial the 2 CSI2 * LDOs on the device are disabled if CSI-2 module is powered on * (0x4845 B304 | 0x4845 B384 [28:27] = 0x1) or in ULPS (0x4845 B304 * | 0x4845 B384 [28:27] = 0x2) mode. Common concerns include: high * current draw on the module supply in active mode. * * Errata does not apply when CSI-2 module is powered off * (0x4845 B304 | 0x4845 B384 [28:27] = 0x0). * * SW Workaround: * Set the following register bits to disable the LDO, * which is essentially CSI2 REG10 bit 6: * * Core 0: 0x4845 B828 = 0x0000 0040 * Core 1: 0x4845 B928 = 0x0000 0040 */ static void cal_camerarx_i913_errata(struct cal_camerarx *phy) { u32 reg10 = reg_read(phy, CAL_CSI2_PHY_REG10); set_field(®10, 1, CAL_CSI2_PHY_REG10_I933_LDO_DISABLE_MASK); phy_dbg(1, phy, "CSI2_%d_REG10 = 0x%08x\n", phy->instance, reg10); reg_write(phy, CAL_CSI2_PHY_REG10, reg10); } /* * Enable the expected IRQ sources */ static void cal_camerarx_enable_irqs(struct cal_camerarx *phy) { u32 val; const u32 cio_err_mask = CAL_CSI2_COMPLEXIO_IRQ_LANE_ERRORS_MASK | CAL_CSI2_COMPLEXIO_IRQ_FIFO_OVR_MASK | CAL_CSI2_COMPLEXIO_IRQ_SHORT_PACKET_MASK | CAL_CSI2_COMPLEXIO_IRQ_ECC_NO_CORRECTION_MASK; /* Enable CIO error irqs */ reg_write(phy->cal, CAL_HL_IRQENABLE_SET(0), CAL_HL_IRQ_CIO_MASK(phy->instance)); reg_write(phy->cal, CAL_CSI2_COMPLEXIO_IRQENABLE(phy->instance), cio_err_mask); /* Always enable OCPO error */ reg_write(phy->cal, CAL_HL_IRQENABLE_SET(0), CAL_HL_IRQ_OCPO_ERR_MASK); /* Enable IRQ_WDMA_END 0/1 */ val = 0; set_field(&val, 1, CAL_HL_IRQ_MASK(phy->instance)); reg_write(phy->cal, CAL_HL_IRQENABLE_SET(1), val); /* Enable IRQ_WDMA_START 0/1 */ val = 0; set_field(&val, 1, CAL_HL_IRQ_MASK(phy->instance)); reg_write(phy->cal, CAL_HL_IRQENABLE_SET(2), val); /* Todo: Add VC_IRQ and CSI2_COMPLEXIO_IRQ handling */ reg_write(phy->cal, CAL_CSI2_VC_IRQENABLE(0), 0xFF000000); } static void cal_camerarx_disable_irqs(struct cal_camerarx *phy) { u32 val; /* Disable CIO error irqs */ reg_write(phy->cal, CAL_HL_IRQENABLE_CLR(0), CAL_HL_IRQ_CIO_MASK(phy->instance)); reg_write(phy->cal, CAL_CSI2_COMPLEXIO_IRQENABLE(phy->instance), 0); /* Disable IRQ_WDMA_END 0/1 */ val = 0; set_field(&val, 1, CAL_HL_IRQ_MASK(phy->instance)); reg_write(phy->cal, CAL_HL_IRQENABLE_CLR(1), val); /* Disable IRQ_WDMA_START 0/1 */ val = 0; set_field(&val, 1, CAL_HL_IRQ_MASK(phy->instance)); reg_write(phy->cal, CAL_HL_IRQENABLE_CLR(2), val); /* Todo: Add VC_IRQ and CSI2_COMPLEXIO_IRQ handling */ reg_write(phy->cal, CAL_CSI2_VC_IRQENABLE(0), 0); } static void cal_camerarx_ppi_enable(struct cal_camerarx *phy) { reg_write(phy->cal, CAL_CSI2_PPI_CTRL(phy->instance), BIT(3)); reg_write_field(phy->cal, CAL_CSI2_PPI_CTRL(phy->instance), 1, CAL_CSI2_PPI_CTRL_IF_EN_MASK); } static void cal_camerarx_ppi_disable(struct cal_camerarx *phy) { reg_write_field(phy->cal, CAL_CSI2_PPI_CTRL(phy->instance), 0, CAL_CSI2_PPI_CTRL_IF_EN_MASK); } static int cal_camerarx_regmap_init(struct cal_dev *cal, struct cal_camerarx *phy) { const struct cal_camerarx_data *phy_data; unsigned int i; if (!cal->data) return -EINVAL; phy_data = &cal->data->camerarx[phy->instance]; for (i = 0; i < F_MAX_FIELDS; i++) { struct reg_field field = { .reg = cal->syscon_camerrx_offset, .lsb = phy_data->fields[i].lsb, .msb = phy_data->fields[i].msb, }; /* * Here we update the reg offset with the * value found in DT */ phy->fields[i] = devm_regmap_field_alloc(cal->dev, cal->syscon_camerrx, field); if (IS_ERR(phy->fields[i])) { cal_err(cal, "Unable to allocate regmap fields\n"); return PTR_ERR(phy->fields[i]); } } return 0; } static int cal_camerarx_parse_dt(struct cal_camerarx *phy) { struct v4l2_fwnode_endpoint *endpoint = &phy->endpoint; struct device_node *ep_node; char data_lanes[V4L2_FWNODE_CSI2_MAX_DATA_LANES * 2]; unsigned int i; int ret; /* * Find the endpoint node for the port corresponding to the PHY * instance, and parse its CSI-2-related properties. */ ep_node = of_graph_get_endpoint_by_regs(phy->cal->dev->of_node, phy->instance, 0); if (!ep_node) { /* * The endpoint is not mandatory, not all PHY instances need to * be connected in DT. */ phy_dbg(3, phy, "Port has no endpoint\n"); return 0; } endpoint->bus_type = V4L2_MBUS_CSI2_DPHY; ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep_node), endpoint); if (ret < 0) { phy_err(phy, "Failed to parse endpoint\n"); goto done; } for (i = 0; i < endpoint->bus.mipi_csi2.num_data_lanes; i++) { unsigned int lane = endpoint->bus.mipi_csi2.data_lanes[i]; if (lane > 4) { phy_err(phy, "Invalid position %u for data lane %u\n", lane, i); ret = -EINVAL; goto done; } data_lanes[i*2] = '0' + lane; data_lanes[i*2+1] = ' '; } data_lanes[i*2-1] = '\0'; phy_dbg(3, phy, "CSI-2 bus: clock lane <%u>, data lanes <%s>, flags 0x%08x\n", endpoint->bus.mipi_csi2.clock_lane, data_lanes, endpoint->bus.mipi_csi2.flags); /* Retrieve the connected device and store it for later use. */ phy->sensor_node = of_graph_get_remote_port_parent(ep_node); if (!phy->sensor_node) { phy_dbg(3, phy, "Can't get remote parent\n"); ret = -EINVAL; goto done; } phy_dbg(1, phy, "Found connected device %pOFn\n", phy->sensor_node); done: of_node_put(ep_node); return ret; } static struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal, unsigned int instance) { struct platform_device *pdev = to_platform_device(cal->dev); struct cal_camerarx *phy; int ret; phy = kzalloc(sizeof(*phy), GFP_KERNEL); if (!phy) return ERR_PTR(-ENOMEM); phy->cal = cal; phy->instance = instance; phy->external_rate = 192000000; phy->res = platform_get_resource_byname(pdev, IORESOURCE_MEM, (instance == 0) ? "cal_rx_core0" : "cal_rx_core1"); phy->base = devm_ioremap_resource(cal->dev, phy->res); if (IS_ERR(phy->base)) { cal_err(cal, "failed to ioremap\n"); ret = PTR_ERR(phy->base); goto error; } cal_dbg(1, cal, "ioresource %s at %pa - %pa\n", phy->res->name, &phy->res->start, &phy->res->end); ret = cal_camerarx_regmap_init(cal, phy); if (ret) goto error; ret = cal_camerarx_parse_dt(phy); if (ret) goto error; return phy; error: kfree(phy); return ERR_PTR(ret); } static void cal_camerarx_destroy(struct cal_camerarx *phy) { if (!phy) return; of_node_put(phy->sensor_node); kfree(phy); } static int cal_camerarx_init_regmap(struct cal_dev *cal) { struct platform_device *pdev = to_platform_device(cal->dev); struct device_node *np = cal->dev->of_node; struct regmap_config config = { }; struct regmap *syscon; struct resource *res; unsigned int offset; void __iomem *base; syscon = syscon_regmap_lookup_by_phandle_args(np, "ti,camerrx-control", 1, &offset); if (!IS_ERR(syscon)) { cal->syscon_camerrx = syscon; cal->syscon_camerrx_offset = offset; return 0; } dev_warn(cal->dev, "failed to get ti,camerrx-control: %ld\n", PTR_ERR(syscon)); /* * Backward DTS compatibility. If syscon entry is not present then * check if the camerrx_control resource is present. */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "camerrx_control"); base = devm_ioremap_resource(cal->dev, res); if (IS_ERR(base)) { cal_err(cal, "failed to ioremap camerrx_control\n"); return PTR_ERR(base); } cal_dbg(1, cal, "ioresource %s at %pa - %pa\n", res->name, &res->start, &res->end); config.reg_bits = 32; config.reg_stride = 4; config.val_bits = 32; config.max_register = resource_size(res) - 4; syscon = regmap_init_mmio(NULL, base, &config); if (IS_ERR(syscon)) { pr_err("regmap init failed\n"); return PTR_ERR(syscon); } /* * In this case the base already point to the direct CM register so no * need for an offset. */ cal->syscon_camerrx = syscon; cal->syscon_camerrx_offset = 0; return 0; } /* ------------------------------------------------------------------ * Context Management * ------------------------------------------------------------------ */ static void cal_ctx_csi2_config(struct cal_ctx *ctx) { u32 val; val = reg_read(ctx->cal, CAL_CSI2_CTX0(ctx->index)); set_field(&val, ctx->cport, CAL_CSI2_CTX_CPORT_MASK); /* * DT type: MIPI CSI-2 Specs * 0x1: All - DT filter is disabled * 0x24: RGB888 1 pixel = 3 bytes * 0x2B: RAW10 4 pixels = 5 bytes * 0x2A: RAW8 1 pixel = 1 byte * 0x1E: YUV422 2 pixels = 4 bytes */ set_field(&val, 0x1, CAL_CSI2_CTX_DT_MASK); set_field(&val, 0, CAL_CSI2_CTX_VC_MASK); set_field(&val, ctx->v_fmt.fmt.pix.height, CAL_CSI2_CTX_LINES_MASK); set_field(&val, CAL_CSI2_CTX_ATT_PIX, CAL_CSI2_CTX_ATT_MASK); set_field(&val, CAL_CSI2_CTX_PACK_MODE_LINE, CAL_CSI2_CTX_PACK_MODE_MASK); reg_write(ctx->cal, CAL_CSI2_CTX0(ctx->index), val); ctx_dbg(3, ctx, "CAL_CSI2_CTX0(%d) = 0x%08x\n", ctx->index, reg_read(ctx->cal, CAL_CSI2_CTX0(ctx->index))); } static void cal_ctx_pix_proc_config(struct cal_ctx *ctx) { u32 val, extract, pack; switch (ctx->fmt->bpp) { case 8: extract = CAL_PIX_PROC_EXTRACT_B8; pack = CAL_PIX_PROC_PACK_B8; break; case 10: extract = CAL_PIX_PROC_EXTRACT_B10_MIPI; pack = CAL_PIX_PROC_PACK_B16; break; case 12: extract = CAL_PIX_PROC_EXTRACT_B12_MIPI; pack = CAL_PIX_PROC_PACK_B16; break; case 16: extract = CAL_PIX_PROC_EXTRACT_B16_LE; pack = CAL_PIX_PROC_PACK_B16; break; default: /* * If you see this warning then it means that you added * some new entry in the cal_formats[] array with a different * bit per pixel values then the one supported below. * Either add support for the new bpp value below or adjust * the new entry to use one of the value below. * * Instead of failing here just use 8 bpp as a default. */ dev_warn_once(ctx->cal->dev, "%s:%d:%s: bpp:%d unsupported! Overwritten with 8.\n", __FILE__, __LINE__, __func__, ctx->fmt->bpp); extract = CAL_PIX_PROC_EXTRACT_B8; pack = CAL_PIX_PROC_PACK_B8; break; } val = reg_read(ctx->cal, CAL_PIX_PROC(ctx->index)); set_field(&val, extract, CAL_PIX_PROC_EXTRACT_MASK); set_field(&val, CAL_PIX_PROC_DPCMD_BYPASS, CAL_PIX_PROC_DPCMD_MASK); set_field(&val, CAL_PIX_PROC_DPCME_BYPASS, CAL_PIX_PROC_DPCME_MASK); set_field(&val, pack, CAL_PIX_PROC_PACK_MASK); set_field(&val, ctx->cport, CAL_PIX_PROC_CPORT_MASK); set_field(&val, 1, CAL_PIX_PROC_EN_MASK); reg_write(ctx->cal, CAL_PIX_PROC(ctx->index), val); ctx_dbg(3, ctx, "CAL_PIX_PROC(%d) = 0x%08x\n", ctx->index, reg_read(ctx->cal, CAL_PIX_PROC(ctx->index))); } static void cal_ctx_wr_dma_config(struct cal_ctx *ctx, unsigned int width, unsigned int height) { u32 val; val = reg_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->index)); set_field(&val, ctx->cport, CAL_WR_DMA_CTRL_CPORT_MASK); set_field(&val, height, CAL_WR_DMA_CTRL_YSIZE_MASK); set_field(&val, CAL_WR_DMA_CTRL_DTAG_PIX_DAT, CAL_WR_DMA_CTRL_DTAG_MASK); set_field(&val, CAL_WR_DMA_CTRL_MODE_CONST, CAL_WR_DMA_CTRL_MODE_MASK); set_field(&val, CAL_WR_DMA_CTRL_PATTERN_LINEAR, CAL_WR_DMA_CTRL_PATTERN_MASK); set_field(&val, 1, CAL_WR_DMA_CTRL_STALL_RD_MASK); reg_write(ctx->cal, CAL_WR_DMA_CTRL(ctx->index), val); ctx_dbg(3, ctx, "CAL_WR_DMA_CTRL(%d) = 0x%08x\n", ctx->index, reg_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->index))); /* * width/16 not sure but giving it a whirl. * zero does not work right */ reg_write_field(ctx->cal, CAL_WR_DMA_OFST(ctx->index), (width / 16), CAL_WR_DMA_OFST_MASK); ctx_dbg(3, ctx, "CAL_WR_DMA_OFST(%d) = 0x%08x\n", ctx->index, reg_read(ctx->cal, CAL_WR_DMA_OFST(ctx->index))); val = reg_read(ctx->cal, CAL_WR_DMA_XSIZE(ctx->index)); /* 64 bit word means no skipping */ set_field(&val, 0, CAL_WR_DMA_XSIZE_XSKIP_MASK); /* * (width*8)/64 this should be size of an entire line * in 64bit word but 0 means all data until the end * is detected automagically */ set_field(&val, (width / 8), CAL_WR_DMA_XSIZE_MASK); reg_write(ctx->cal, CAL_WR_DMA_XSIZE(ctx->index), val); ctx_dbg(3, ctx, "CAL_WR_DMA_XSIZE(%d) = 0x%08x\n", ctx->index, reg_read(ctx->cal, CAL_WR_DMA_XSIZE(ctx->index))); val = reg_read(ctx->cal, CAL_CTRL); set_field(&val, CAL_CTRL_BURSTSIZE_BURST128, CAL_CTRL_BURSTSIZE_MASK); set_field(&val, 0xF, CAL_CTRL_TAGCNT_MASK); set_field(&val, CAL_CTRL_POSTED_WRITES_NONPOSTED, CAL_CTRL_POSTED_WRITES_MASK); set_field(&val, 0xFF, CAL_CTRL_MFLAGL_MASK); set_field(&val, 0xFF, CAL_CTRL_MFLAGH_MASK); reg_write(ctx->cal, CAL_CTRL, val); ctx_dbg(3, ctx, "CAL_CTRL = 0x%08x\n", reg_read(ctx->cal, CAL_CTRL)); } static void cal_ctx_wr_dma_addr(struct cal_ctx *ctx, unsigned int dmaaddr) { reg_write(ctx->cal, CAL_WR_DMA_ADDR(ctx->index), dmaaddr); } /* ------------------------------------------------------------------ * IRQ Handling * ------------------------------------------------------------------ */ static inline void cal_schedule_next_buffer(struct cal_ctx *ctx) { struct cal_dmaqueue *dma_q = &ctx->vidq; struct cal_buffer *buf; unsigned long addr; buf = list_entry(dma_q->active.next, struct cal_buffer, list); ctx->next_frm = buf; list_del(&buf->list); addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); cal_ctx_wr_dma_addr(ctx, addr); } static inline void cal_process_buffer_complete(struct cal_ctx *ctx) { ctx->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns(); ctx->cur_frm->vb.field = ctx->m_fmt.field; ctx->cur_frm->vb.sequence = ctx->sequence++; vb2_buffer_done(&ctx->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE); ctx->cur_frm = ctx->next_frm; } static irqreturn_t cal_irq(int irq_cal, void *data) { struct cal_dev *cal = data; struct cal_ctx *ctx; struct cal_dmaqueue *dma_q; u32 status; status = reg_read(cal, CAL_HL_IRQSTATUS(0)); if (status) { unsigned int i; reg_write(cal, CAL_HL_IRQSTATUS(0), status); if (status & CAL_HL_IRQ_OCPO_ERR_MASK) dev_err_ratelimited(cal->dev, "OCPO ERROR\n"); for (i = 0; i < CAL_NUM_CSI2_PORTS; ++i) { if (status & CAL_HL_IRQ_CIO_MASK(i)) { u32 cio_stat = reg_read(cal, CAL_CSI2_COMPLEXIO_IRQSTATUS(i)); dev_err_ratelimited(cal->dev, "CIO%u error: %#08x\n", i, cio_stat); reg_write(cal, CAL_CSI2_COMPLEXIO_IRQSTATUS(i), cio_stat); } } } /* Check which DMA just finished */ status = reg_read(cal, CAL_HL_IRQSTATUS(1)); if (status) { unsigned int i; /* Clear Interrupt status */ reg_write(cal, CAL_HL_IRQSTATUS(1), status); for (i = 0; i < ARRAY_SIZE(cal->ctx); ++i) { if (status & CAL_HL_IRQ_MASK(i)) { ctx = cal->ctx[i]; spin_lock(&ctx->slock); ctx->dma_act = false; if (ctx->cur_frm != ctx->next_frm) cal_process_buffer_complete(ctx); spin_unlock(&ctx->slock); } } } /* Check which DMA just started */ status = reg_read(cal, CAL_HL_IRQSTATUS(2)); if (status) { unsigned int i; /* Clear Interrupt status */ reg_write(cal, CAL_HL_IRQSTATUS(2), status); for (i = 0; i < ARRAY_SIZE(cal->ctx); ++i) { if (status & CAL_HL_IRQ_MASK(i)) { ctx = cal->ctx[i]; dma_q = &ctx->vidq; spin_lock(&ctx->slock); ctx->dma_act = true; if (!list_empty(&dma_q->active) && ctx->cur_frm == ctx->next_frm) cal_schedule_next_buffer(ctx); spin_unlock(&ctx->slock); } } } return IRQ_HANDLED; } /* ------------------------------------------------------------------ * V4L2 Video IOCTLs * ------------------------------------------------------------------ */ static const struct cal_fmt *find_format_by_pix(struct cal_ctx *ctx, u32 pixelformat) { const struct cal_fmt *fmt; unsigned int k; for (k = 0; k < ctx->num_active_fmt; k++) { fmt = ctx->active_fmt[k]; if (fmt->fourcc == pixelformat) return fmt; } return NULL; } static const struct cal_fmt *find_format_by_code(struct cal_ctx *ctx, u32 code) { const struct cal_fmt *fmt; unsigned int k; for (k = 0; k < ctx->num_active_fmt; k++) { fmt = ctx->active_fmt[k]; if (fmt->code == code) return fmt; } return NULL; } static int cal_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { struct cal_ctx *ctx = video_drvdata(file); strscpy(cap->driver, CAL_MODULE_NAME, sizeof(cap->driver)); strscpy(cap->card, CAL_MODULE_NAME, sizeof(cap->card)); snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", dev_name(ctx->cal->dev)); return 0; } static int cal_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_fmt *fmt; if (f->index >= ctx->num_active_fmt) return -EINVAL; fmt = ctx->active_fmt[f->index]; f->pixelformat = fmt->fourcc; f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; return 0; } static int __subdev_get_format(struct cal_ctx *ctx, struct v4l2_mbus_framefmt *fmt) { struct v4l2_subdev_format sd_fmt; struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format; int ret; sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; sd_fmt.pad = 0; ret = v4l2_subdev_call(ctx->phy->sensor, pad, get_fmt, NULL, &sd_fmt); if (ret) return ret; *fmt = *mbus_fmt; ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__, fmt->width, fmt->height, fmt->code); return 0; } static int __subdev_set_format(struct cal_ctx *ctx, struct v4l2_mbus_framefmt *fmt) { struct v4l2_subdev_format sd_fmt; struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format; int ret; sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; sd_fmt.pad = 0; *mbus_fmt = *fmt; ret = v4l2_subdev_call(ctx->phy->sensor, pad, set_fmt, NULL, &sd_fmt); if (ret) return ret; ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__, fmt->width, fmt->height, fmt->code); return 0; } static int cal_calc_format_size(struct cal_ctx *ctx, const struct cal_fmt *fmt, struct v4l2_format *f) { u32 bpl, max_width; if (!fmt) { ctx_dbg(3, ctx, "No cal_fmt provided!\n"); return -EINVAL; } /* * Maximum width is bound by the DMA max width in bytes. * We need to recalculate the actual maxi width depending on the * number of bytes per pixels required. */ max_width = MAX_WIDTH_BYTES / (ALIGN(fmt->bpp, 8) >> 3); v4l_bound_align_image(&f->fmt.pix.width, 48, max_width, 2, &f->fmt.pix.height, 32, MAX_HEIGHT_LINES, 0, 0); bpl = (f->fmt.pix.width * ALIGN(fmt->bpp, 8)) >> 3; f->fmt.pix.bytesperline = ALIGN(bpl, 16); f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; ctx_dbg(3, ctx, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n", __func__, fourcc_to_str(f->fmt.pix.pixelformat), f->fmt.pix.width, f->fmt.pix.height, f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); return 0; } static int cal_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); *f = ctx->v_fmt; return 0; } static int cal_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_fmt *fmt; struct v4l2_subdev_frame_size_enum fse; int ret, found; fmt = find_format_by_pix(ctx, f->fmt.pix.pixelformat); if (!fmt) { ctx_dbg(3, ctx, "Fourcc format (0x%08x) not found.\n", f->fmt.pix.pixelformat); /* Just get the first one enumerated */ fmt = ctx->active_fmt[0]; f->fmt.pix.pixelformat = fmt->fourcc; } f->fmt.pix.field = ctx->v_fmt.fmt.pix.field; /* check for/find a valid width/height */ ret = 0; found = false; fse.pad = 0; fse.code = fmt->code; fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; for (fse.index = 0; ; fse.index++) { ret = v4l2_subdev_call(ctx->phy->sensor, pad, enum_frame_size, NULL, &fse); if (ret) break; if ((f->fmt.pix.width == fse.max_width) && (f->fmt.pix.height == fse.max_height)) { found = true; break; } else if ((f->fmt.pix.width >= fse.min_width) && (f->fmt.pix.width <= fse.max_width) && (f->fmt.pix.height >= fse.min_height) && (f->fmt.pix.height <= fse.max_height)) { found = true; break; } } if (!found) { /* use existing values as default */ f->fmt.pix.width = ctx->v_fmt.fmt.pix.width; f->fmt.pix.height = ctx->v_fmt.fmt.pix.height; } /* * Use current colorspace for now, it will get * updated properly during s_fmt */ f->fmt.pix.colorspace = ctx->v_fmt.fmt.pix.colorspace; return cal_calc_format_size(ctx, fmt, f); } static int cal_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct cal_ctx *ctx = video_drvdata(file); struct vb2_queue *q = &ctx->vb_vidq; const struct cal_fmt *fmt; struct v4l2_mbus_framefmt mbus_fmt; int ret; if (vb2_is_busy(q)) { ctx_dbg(3, ctx, "%s device busy\n", __func__); return -EBUSY; } ret = cal_try_fmt_vid_cap(file, priv, f); if (ret < 0) return ret; fmt = find_format_by_pix(ctx, f->fmt.pix.pixelformat); v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, fmt->code); ret = __subdev_set_format(ctx, &mbus_fmt); if (ret) return ret; /* Just double check nothing has gone wrong */ if (mbus_fmt.code != fmt->code) { ctx_dbg(3, ctx, "%s subdev changed format on us, this should not happen\n", __func__); return -EINVAL; } v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &mbus_fmt); ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ctx->v_fmt.fmt.pix.pixelformat = fmt->fourcc; cal_calc_format_size(ctx, fmt, &ctx->v_fmt); ctx->fmt = fmt; ctx->m_fmt = mbus_fmt; *f = ctx->v_fmt; return 0; } static int cal_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_fmt *fmt; struct v4l2_subdev_frame_size_enum fse; int ret; /* check for valid format */ fmt = find_format_by_pix(ctx, fsize->pixel_format); if (!fmt) { ctx_dbg(3, ctx, "Invalid pixel code: %x\n", fsize->pixel_format); return -EINVAL; } fse.index = fsize->index; fse.pad = 0; fse.code = fmt->code; fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(ctx->phy->sensor, pad, enum_frame_size, NULL, &fse); if (ret) return ret; ctx_dbg(1, ctx, "%s: index: %d code: %x W:[%d,%d] H:[%d,%d]\n", __func__, fse.index, fse.code, fse.min_width, fse.max_width, fse.min_height, fse.max_height); fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; fsize->discrete.width = fse.max_width; fsize->discrete.height = fse.max_height; return 0; } static int cal_enum_input(struct file *file, void *priv, struct v4l2_input *inp) { if (inp->index > 0) return -EINVAL; inp->type = V4L2_INPUT_TYPE_CAMERA; sprintf(inp->name, "Camera %u", inp->index); return 0; } static int cal_g_input(struct file *file, void *priv, unsigned int *i) { *i = 0; return 0; } static int cal_s_input(struct file *file, void *priv, unsigned int i) { return i > 0 ? -EINVAL : 0; } /* timeperframe is arbitrary and continuous */ static int cal_enum_frameintervals(struct file *file, void *priv, struct v4l2_frmivalenum *fival) { struct cal_ctx *ctx = video_drvdata(file); const struct cal_fmt *fmt; struct v4l2_subdev_frame_interval_enum fie = { .index = fival->index, .width = fival->width, .height = fival->height, .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; int ret; fmt = find_format_by_pix(ctx, fival->pixel_format); if (!fmt) return -EINVAL; fie.code = fmt->code; ret = v4l2_subdev_call(ctx->phy->sensor, pad, enum_frame_interval, NULL, &fie); if (ret) return ret; fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; fival->discrete = fie.interval; return 0; } static const struct v4l2_file_operations cal_fops = { .owner = THIS_MODULE, .open = v4l2_fh_open, .release = vb2_fop_release, .read = vb2_fop_read, .poll = vb2_fop_poll, .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ .mmap = vb2_fop_mmap, }; static const struct v4l2_ioctl_ops cal_ioctl_ops = { .vidioc_querycap = cal_querycap, .vidioc_enum_fmt_vid_cap = cal_enum_fmt_vid_cap, .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap, .vidioc_try_fmt_vid_cap = cal_try_fmt_vid_cap, .vidioc_s_fmt_vid_cap = cal_s_fmt_vid_cap, .vidioc_enum_framesizes = cal_enum_framesizes, .vidioc_reqbufs = vb2_ioctl_reqbufs, .vidioc_create_bufs = vb2_ioctl_create_bufs, .vidioc_prepare_buf = vb2_ioctl_prepare_buf, .vidioc_querybuf = vb2_ioctl_querybuf, .vidioc_qbuf = vb2_ioctl_qbuf, .vidioc_dqbuf = vb2_ioctl_dqbuf, .vidioc_expbuf = vb2_ioctl_expbuf, .vidioc_enum_input = cal_enum_input, .vidioc_g_input = cal_g_input, .vidioc_s_input = cal_s_input, .vidioc_enum_frameintervals = cal_enum_frameintervals, .vidioc_streamon = vb2_ioctl_streamon, .vidioc_streamoff = vb2_ioctl_streamoff, .vidioc_log_status = v4l2_ctrl_log_status, .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, .vidioc_unsubscribe_event = v4l2_event_unsubscribe, }; /* ------------------------------------------------------------------ * videobuf2 Operations * ------------------------------------------------------------------ */ static int cal_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) { struct cal_ctx *ctx = vb2_get_drv_priv(vq); unsigned size = ctx->v_fmt.fmt.pix.sizeimage; if (vq->num_buffers + *nbuffers < 3) *nbuffers = 3 - vq->num_buffers; if (*nplanes) { if (sizes[0] < size) return -EINVAL; size = sizes[0]; } *nplanes = 1; sizes[0] = size; ctx_dbg(3, ctx, "nbuffers=%d, size=%d\n", *nbuffers, sizes[0]); return 0; } static int cal_buffer_prepare(struct vb2_buffer *vb) { struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); struct cal_buffer *buf = container_of(vb, struct cal_buffer, vb.vb2_buf); unsigned long size; if (WARN_ON(!ctx->fmt)) return -EINVAL; size = ctx->v_fmt.fmt.pix.sizeimage; if (vb2_plane_size(vb, 0) < size) { ctx_err(ctx, "data will not fit into plane (%lu < %lu)\n", vb2_plane_size(vb, 0), size); return -EINVAL; } vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); return 0; } static void cal_buffer_queue(struct vb2_buffer *vb) { struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); struct cal_buffer *buf = container_of(vb, struct cal_buffer, vb.vb2_buf); struct cal_dmaqueue *vidq = &ctx->vidq; unsigned long flags; /* recheck locking */ spin_lock_irqsave(&ctx->slock, flags); list_add_tail(&buf->list, &vidq->active); spin_unlock_irqrestore(&ctx->slock, flags); } static int cal_start_streaming(struct vb2_queue *vq, unsigned int count) { struct cal_ctx *ctx = vb2_get_drv_priv(vq); struct cal_dmaqueue *dma_q = &ctx->vidq; struct cal_buffer *buf, *tmp; unsigned long addr; unsigned long flags; int ret; spin_lock_irqsave(&ctx->slock, flags); if (list_empty(&dma_q->active)) { spin_unlock_irqrestore(&ctx->slock, flags); ctx_dbg(3, ctx, "buffer queue is empty\n"); return -EIO; } buf = list_entry(dma_q->active.next, struct cal_buffer, list); ctx->cur_frm = buf; ctx->next_frm = buf; list_del(&buf->list); spin_unlock_irqrestore(&ctx->slock, flags); addr = vb2_dma_contig_plane_dma_addr(&ctx->cur_frm->vb.vb2_buf, 0); ctx->sequence = 0; ret = cal_camerarx_get_external_info(ctx->phy); if (ret < 0) goto err; ret = v4l2_subdev_call(ctx->phy->sensor, core, s_power, 1); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) { ctx_err(ctx, "power on failed in subdev\n"); goto err; } pm_runtime_get_sync(ctx->cal->dev); cal_ctx_csi2_config(ctx); cal_ctx_pix_proc_config(ctx); cal_ctx_wr_dma_config(ctx, ctx->v_fmt.fmt.pix.bytesperline, ctx->v_fmt.fmt.pix.height); cal_camerarx_lane_config(ctx->phy); cal_camerarx_enable_irqs(ctx->phy); cal_camerarx_init(ctx->phy, ctx->fmt); ret = v4l2_subdev_call(ctx->phy->sensor, video, s_stream, 1); if (ret) { v4l2_subdev_call(ctx->phy->sensor, core, s_power, 0); ctx_err(ctx, "stream on failed in subdev\n"); pm_runtime_put_sync(ctx->cal->dev); goto err; } cal_camerarx_wait_ready(ctx->phy); cal_ctx_wr_dma_addr(ctx, addr); cal_camerarx_ppi_enable(ctx->phy); if (debug >= 4) cal_quickdump_regs(ctx->cal); return 0; err: spin_lock_irqsave(&ctx->slock, flags); vb2_buffer_done(&ctx->cur_frm->vb.vb2_buf, VB2_BUF_STATE_QUEUED); ctx->cur_frm = NULL; ctx->next_frm = NULL; list_for_each_entry_safe(buf, tmp, &dma_q->active, list) { list_del(&buf->list); vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); } spin_unlock_irqrestore(&ctx->slock, flags); return ret; } static void cal_stop_streaming(struct vb2_queue *vq) { struct cal_ctx *ctx = vb2_get_drv_priv(vq); struct cal_dmaqueue *dma_q = &ctx->vidq; struct cal_buffer *buf, *tmp; unsigned long timeout; unsigned long flags; int ret; bool dma_act; cal_camerarx_ppi_disable(ctx->phy); /* wait for stream and dma to finish */ dma_act = true; timeout = jiffies + msecs_to_jiffies(500); while (dma_act && time_before(jiffies, timeout)) { msleep(50); spin_lock_irqsave(&ctx->slock, flags); dma_act = ctx->dma_act; spin_unlock_irqrestore(&ctx->slock, flags); } if (dma_act) ctx_err(ctx, "failed to disable dma cleanly\n"); cal_camerarx_disable_irqs(ctx->phy); cal_camerarx_deinit(ctx->phy); if (v4l2_subdev_call(ctx->phy->sensor, video, s_stream, 0)) ctx_err(ctx, "stream off failed in subdev\n"); ret = v4l2_subdev_call(ctx->phy->sensor, core, s_power, 0); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) ctx_err(ctx, "power off failed in subdev\n"); /* Release all active buffers */ spin_lock_irqsave(&ctx->slock, flags); list_for_each_entry_safe(buf, tmp, &dma_q->active, list) { list_del(&buf->list); vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); } if (ctx->cur_frm == ctx->next_frm) { vb2_buffer_done(&ctx->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR); } else { vb2_buffer_done(&ctx->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR); vb2_buffer_done(&ctx->next_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR); } ctx->cur_frm = NULL; ctx->next_frm = NULL; spin_unlock_irqrestore(&ctx->slock, flags); pm_runtime_put_sync(ctx->cal->dev); } static const struct vb2_ops cal_video_qops = { .queue_setup = cal_queue_setup, .buf_prepare = cal_buffer_prepare, .buf_queue = cal_buffer_queue, .start_streaming = cal_start_streaming, .stop_streaming = cal_stop_streaming, .wait_prepare = vb2_ops_wait_prepare, .wait_finish = vb2_ops_wait_finish, }; /* ------------------------------------------------------------------ * V4L2 Initialization and Registration * ------------------------------------------------------------------ */ static const struct video_device cal_videodev = { .name = CAL_MODULE_NAME, .fops = &cal_fops, .ioctl_ops = &cal_ioctl_ops, .minor = -1, .release = video_device_release_empty, .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | V4L2_CAP_READWRITE, }; static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx) { struct v4l2_subdev_mbus_code_enum mbus_code; struct v4l2_mbus_framefmt mbus_fmt; const struct cal_fmt *fmt; unsigned int i, j, k; int ret = 0; /* Enumerate sub device formats and enable all matching local formats */ ctx->active_fmt = devm_kcalloc(ctx->cal->dev, ARRAY_SIZE(cal_formats), sizeof(*ctx->active_fmt), GFP_KERNEL); if (!ctx->active_fmt) return -ENOMEM; ctx->num_active_fmt = 0; for (j = 0, i = 0; ret != -EINVAL; ++j) { memset(&mbus_code, 0, sizeof(mbus_code)); mbus_code.index = j; mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(ctx->phy->sensor, pad, enum_mbus_code, NULL, &mbus_code); if (ret) continue; ctx_dbg(2, ctx, "subdev %s: code: %04x idx: %u\n", ctx->phy->sensor->name, mbus_code.code, j); for (k = 0; k < ARRAY_SIZE(cal_formats); k++) { const struct cal_fmt *fmt = &cal_formats[k]; if (mbus_code.code == fmt->code) { ctx->active_fmt[i] = fmt; ctx_dbg(2, ctx, "matched fourcc: %s: code: %04x idx: %u\n", fourcc_to_str(fmt->fourcc), fmt->code, i); ctx->num_active_fmt = ++i; } } } if (i == 0) { ctx_err(ctx, "No suitable format reported by subdev %s\n", ctx->phy->sensor->name); return -EINVAL; } ret = __subdev_get_format(ctx, &mbus_fmt); if (ret) return ret; fmt = find_format_by_code(ctx, mbus_fmt.code); if (!fmt) { ctx_dbg(3, ctx, "mbus code format (0x%08x) not found.\n", mbus_fmt.code); return -EINVAL; } /* Save current subdev format */ v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &mbus_fmt); ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ctx->v_fmt.fmt.pix.pixelformat = fmt->fourcc; cal_calc_format_size(ctx, fmt, &ctx->v_fmt); ctx->fmt = fmt; ctx->m_fmt = mbus_fmt; return 0; } static int cal_ctx_v4l2_register(struct cal_ctx *ctx) { struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler; struct video_device *vfd = &ctx->vdev; int ret; ret = cal_ctx_v4l2_init_formats(ctx); if (ret) return ret; ret = v4l2_ctrl_add_handler(hdl, ctx->phy->sensor->ctrl_handler, NULL, true); if (ret < 0) { ctx_err(ctx, "Failed to add sensor ctrl handler\n"); return ret; } ret = video_register_device(vfd, VFL_TYPE_VIDEO, video_nr); if (ret < 0) { ctx_err(ctx, "Failed to register video device\n"); return ret; } ctx_info(ctx, "V4L2 device registered as %s\n", video_device_node_name(vfd)); return 0; } static void cal_ctx_v4l2_unregister(struct cal_ctx *ctx) { ctx_dbg(1, ctx, "unregistering %s\n", video_device_node_name(&ctx->vdev)); video_unregister_device(&ctx->vdev); } static int cal_ctx_v4l2_init(struct cal_ctx *ctx) { struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler; struct video_device *vfd = &ctx->vdev; struct vb2_queue *q = &ctx->vb_vidq; int ret; INIT_LIST_HEAD(&ctx->vidq.active); spin_lock_init(&ctx->slock); mutex_init(&ctx->mutex); /* Initialize the vb2 queue. */ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; q->drv_priv = ctx; q->buf_struct_size = sizeof(struct cal_buffer); q->ops = &cal_video_qops; q->mem_ops = &vb2_dma_contig_memops; q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; q->lock = &ctx->mutex; q->min_buffers_needed = 3; q->dev = ctx->cal->dev; ret = vb2_queue_init(q); if (ret) return ret; /* Initialize the video device and media entity. */ *vfd = cal_videodev; vfd->v4l2_dev = &ctx->cal->v4l2_dev; vfd->queue = q; snprintf(vfd->name, sizeof(vfd->name), "CAL output %u", ctx->index); vfd->lock = &ctx->mutex; video_set_drvdata(vfd, ctx); ctx->pad.flags = MEDIA_PAD_FL_SINK; ret = media_entity_pads_init(&vfd->entity, 1, &ctx->pad); if (ret < 0) return ret; /* Initialize the control handler. */ ret = v4l2_ctrl_handler_init(hdl, 11); if (ret < 0) { ctx_err(ctx, "Failed to init ctrl handler\n"); goto error; } vfd->ctrl_handler = hdl; return 0; error: media_entity_cleanup(&vfd->entity); return ret; } static void cal_ctx_v4l2_cleanup(struct cal_ctx *ctx) { v4l2_ctrl_handler_free(&ctx->ctrl_handler); media_entity_cleanup(&ctx->vdev.entity); } /* ------------------------------------------------------------------ * Asynchronous V4L2 subdev binding * ------------------------------------------------------------------ */ struct cal_v4l2_async_subdev { struct v4l2_async_subdev asd; struct cal_camerarx *phy; }; static inline struct cal_v4l2_async_subdev * to_cal_asd(struct v4l2_async_subdev *asd) { return container_of(asd, struct cal_v4l2_async_subdev, asd); } static int cal_async_notifier_bound(struct v4l2_async_notifier *notifier, struct v4l2_subdev *subdev, struct v4l2_async_subdev *asd) { struct cal_camerarx *phy = to_cal_asd(asd)->phy; if (phy->sensor) { phy_info(phy, "Rejecting subdev %s (Already set!!)", subdev->name); return 0; } phy->sensor = subdev; phy_dbg(1, phy, "Using sensor %s for capture\n", subdev->name); return 0; } static int cal_async_notifier_complete(struct v4l2_async_notifier *notifier) { struct cal_dev *cal = container_of(notifier, struct cal_dev, notifier); unsigned int i; for (i = 0; i < ARRAY_SIZE(cal->ctx); ++i) { if (cal->ctx[i]) cal_ctx_v4l2_register(cal->ctx[i]); } return 0; } static const struct v4l2_async_notifier_operations cal_async_notifier_ops = { .bound = cal_async_notifier_bound, .complete = cal_async_notifier_complete, }; static int cal_async_notifier_register(struct cal_dev *cal) { unsigned int i; int ret; v4l2_async_notifier_init(&cal->notifier); cal->notifier.ops = &cal_async_notifier_ops; for (i = 0; i < ARRAY_SIZE(cal->phy); ++i) { struct cal_camerarx *phy = cal->phy[i]; struct cal_v4l2_async_subdev *casd; struct v4l2_async_subdev *asd; struct fwnode_handle *fwnode; if (!phy || !phy->sensor_node) continue; fwnode = of_fwnode_handle(phy->sensor_node); asd = v4l2_async_notifier_add_fwnode_subdev(&cal->notifier, fwnode, sizeof(*asd)); if (IS_ERR(asd)) { phy_err(phy, "Failed to add subdev to notifier\n"); ret = PTR_ERR(asd); goto error; } casd = to_cal_asd(asd); casd->phy = phy; } ret = v4l2_async_notifier_register(&cal->v4l2_dev, &cal->notifier); if (ret) { cal_err(cal, "Error registering async notifier\n"); goto error; } return 0; error: v4l2_async_notifier_cleanup(&cal->notifier); return ret; } static void cal_async_notifier_unregister(struct cal_dev *cal) { v4l2_async_notifier_unregister(&cal->notifier); v4l2_async_notifier_cleanup(&cal->notifier); } /* ------------------------------------------------------------------ * Media and V4L2 device handling * ------------------------------------------------------------------ */ /* * Register user-facing devices. To be called at the end of the probe function * when all resources are initialized and ready. */ static int cal_media_register(struct cal_dev *cal) { int ret; ret = media_device_register(&cal->mdev); if (ret) { cal_err(cal, "Failed to register media device\n"); return ret; } /* * Register the async notifier. This may trigger registration of the * V4L2 video devices if all subdevs are ready. */ ret = cal_async_notifier_register(cal); if (ret) { media_device_unregister(&cal->mdev); return ret; } return 0; } /* * Unregister the user-facing devices, but don't free memory yet. To be called * at the beginning of the remove function, to disallow access from userspace. */ static void cal_media_unregister(struct cal_dev *cal) { unsigned int i; /* Unregister all the V4L2 video devices. */ for (i = 0; i < ARRAY_SIZE(cal->ctx); i++) { if (cal->ctx[i]) cal_ctx_v4l2_unregister(cal->ctx[i]); } cal_async_notifier_unregister(cal); media_device_unregister(&cal->mdev); } /* * Initialize the in-kernel objects. To be called at the beginning of the probe * function, before the V4L2 device is used by the driver. */ static int cal_media_init(struct cal_dev *cal) { struct media_device *mdev = &cal->mdev; int ret; mdev->dev = cal->dev; mdev->hw_revision = cal->revision; strscpy(mdev->model, "CAL", sizeof(mdev->model)); snprintf(mdev->bus_info, sizeof(mdev->bus_info), "platform:%s", dev_name(mdev->dev)); media_device_init(mdev); /* * Initialize the V4L2 device (despite the function name, this performs * initialization, not registration). */ cal->v4l2_dev.mdev = mdev; ret = v4l2_device_register(cal->dev, &cal->v4l2_dev); if (ret) { cal_err(cal, "Failed to register V4L2 device\n"); return ret; } vb2_dma_contig_set_max_seg_size(cal->dev, DMA_BIT_MASK(32)); return 0; } /* * Cleanup the in-kernel objects, freeing memory. To be called at the very end * of the remove sequence, when nothing (including userspace) can access the * objects anymore. */ static void cal_media_cleanup(struct cal_dev *cal) { unsigned int i; for (i = 0; i < ARRAY_SIZE(cal->ctx); i++) { if (cal->ctx[i]) cal_ctx_v4l2_cleanup(cal->ctx[i]); } v4l2_device_unregister(&cal->v4l2_dev); media_device_cleanup(&cal->mdev); vb2_dma_contig_clear_max_seg_size(cal->dev); } /* ------------------------------------------------------------------ * Initialization and module stuff * ------------------------------------------------------------------ */ static struct cal_ctx *cal_ctx_create(struct cal_dev *cal, int inst) { struct cal_ctx *ctx; int ret; ctx = devm_kzalloc(cal->dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return NULL; ctx->cal = cal; ctx->phy = cal->phy[inst]; ctx->index = inst; ctx->cport = inst; ret = cal_ctx_v4l2_init(ctx); if (ret) return NULL; return ctx; } static const struct of_device_id cal_of_match[] = { { .compatible = "ti,dra72-cal", .data = (void *)&dra72x_cal_data, }, { .compatible = "ti,dra72-pre-es2-cal", .data = (void *)&dra72x_es1_cal_data, }, { .compatible = "ti,dra76-cal", .data = (void *)&dra76x_cal_data, }, { .compatible = "ti,am654-cal", .data = (void *)&am654_cal_data, }, {}, }; MODULE_DEVICE_TABLE(of, cal_of_match); /* Get hardware revision and info. */ #define CAL_HL_HWINFO_VALUE 0xa3c90469 static void cal_get_hwinfo(struct cal_dev *cal) { u32 hwinfo; cal->revision = reg_read(cal, CAL_HL_REVISION); switch (FIELD_GET(CAL_HL_REVISION_SCHEME_MASK, cal->revision)) { case CAL_HL_REVISION_SCHEME_H08: cal_dbg(3, cal, "CAL HW revision %lu.%lu.%lu (0x%08x)\n", FIELD_GET(CAL_HL_REVISION_MAJOR_MASK, cal->revision), FIELD_GET(CAL_HL_REVISION_MINOR_MASK, cal->revision), FIELD_GET(CAL_HL_REVISION_RTL_MASK, cal->revision), cal->revision); break; case CAL_HL_REVISION_SCHEME_LEGACY: default: cal_info(cal, "Unexpected CAL HW revision 0x%08x\n", cal->revision); break; } hwinfo = reg_read(cal, CAL_HL_HWINFO); if (hwinfo != CAL_HL_HWINFO_VALUE) cal_info(cal, "CAL_HL_HWINFO = 0x%08x, expected 0x%08x\n", hwinfo, CAL_HL_HWINFO_VALUE); } static int cal_probe(struct platform_device *pdev) { struct cal_dev *cal; struct cal_ctx *ctx; bool connected = false; unsigned int i; int ret; int irq; cal = devm_kzalloc(&pdev->dev, sizeof(*cal), GFP_KERNEL); if (!cal) return -ENOMEM; cal->data = of_device_get_match_data(&pdev->dev); if (!cal->data) { dev_err(&pdev->dev, "Could not get feature data based on compatible version\n"); return -ENODEV; } cal->dev = &pdev->dev; platform_set_drvdata(pdev, cal); /* Acquire resources: clocks, CAMERARX regmap, I/O memory and IRQ. */ cal->fclk = devm_clk_get(&pdev->dev, "fck"); if (IS_ERR(cal->fclk)) { dev_err(&pdev->dev, "cannot get CAL fclk\n"); return PTR_ERR(cal->fclk); } ret = cal_camerarx_init_regmap(cal); if (ret < 0) return ret; cal->res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cal_top"); cal->base = devm_ioremap_resource(&pdev->dev, cal->res); if (IS_ERR(cal->base)) return PTR_ERR(cal->base); cal_dbg(1, cal, "ioresource %s at %pa - %pa\n", cal->res->name, &cal->res->start, &cal->res->end); irq = platform_get_irq(pdev, 0); cal_dbg(1, cal, "got irq# %d\n", irq); ret = devm_request_irq(&pdev->dev, irq, cal_irq, 0, CAL_MODULE_NAME, cal); if (ret) return ret; /* Read the revision and hardware info to verify hardware access. */ pm_runtime_enable(&pdev->dev); ret = pm_runtime_get_sync(&pdev->dev); if (ret) goto error_pm_runtime; cal_get_hwinfo(cal); pm_runtime_put_sync(&pdev->dev); /* Create CAMERARX PHYs. */ for (i = 0; i < cal->data->num_csi2_phy; ++i) { cal->phy[i] = cal_camerarx_create(cal, i); if (IS_ERR(cal->phy[i])) { ret = PTR_ERR(cal->phy[i]); cal->phy[i] = NULL; goto error_camerarx; } if (cal->phy[i]->sensor_node) connected = true; } if (!connected) { cal_err(cal, "Neither port is configured, no point in staying up\n"); ret = -ENODEV; goto error_camerarx; } /* Initialize the media device. */ ret = cal_media_init(cal); if (ret < 0) goto error_camerarx; /* Create contexts. */ for (i = 0; i < cal->data->num_csi2_phy; ++i) { if (!cal->phy[i]->sensor_node) continue; cal->ctx[i] = cal_ctx_create(cal, i); if (!cal->ctx[i]) { cal_err(cal, "Failed to create context %u\n", i); ret = -ENODEV; goto error_context; } } /* Register the media device. */ ret = cal_media_register(cal); if (ret) goto error_context; return 0; error_context: for (i = 0; i < ARRAY_SIZE(cal->ctx); i++) { ctx = cal->ctx[i]; if (ctx) cal_ctx_v4l2_cleanup(ctx); } cal_media_cleanup(cal); error_camerarx: for (i = 0; i < ARRAY_SIZE(cal->phy); i++) cal_camerarx_destroy(cal->phy[i]); error_pm_runtime: pm_runtime_disable(&pdev->dev); return ret; } static int cal_remove(struct platform_device *pdev) { struct cal_dev *cal = platform_get_drvdata(pdev); unsigned int i; cal_dbg(1, cal, "Removing %s\n", CAL_MODULE_NAME); pm_runtime_get_sync(&pdev->dev); cal_media_unregister(cal); for (i = 0; i < ARRAY_SIZE(cal->phy); i++) { if (cal->phy[i]) cal_camerarx_disable(cal->phy[i]); } cal_media_cleanup(cal); for (i = 0; i < ARRAY_SIZE(cal->phy); i++) cal_camerarx_destroy(cal->phy[i]); pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); return 0; } static int cal_runtime_resume(struct device *dev) { struct cal_dev *cal = dev_get_drvdata(dev); if (cal->data->flags & DRA72_CAL_PRE_ES2_LDO_DISABLE) { /* * Apply errata on both port everytime we (re-)enable * the clock */ cal_camerarx_i913_errata(cal->phy[0]); cal_camerarx_i913_errata(cal->phy[1]); } return 0; } static const struct dev_pm_ops cal_pm_ops = { .runtime_resume = cal_runtime_resume, }; static struct platform_driver cal_pdrv = { .probe = cal_probe, .remove = cal_remove, .driver = { .name = CAL_MODULE_NAME, .pm = &cal_pm_ops, .of_match_table = cal_of_match, }, }; module_platform_driver(cal_pdrv);