diff options
Diffstat (limited to 'drivers/media/platform/ti/cal/cal.c')
| -rw-r--r-- | drivers/media/platform/ti/cal/cal.c | 1375 |
1 files changed, 1375 insertions, 0 deletions
diff --git a/drivers/media/platform/ti/cal/cal.c b/drivers/media/platform/ti/cal/cal.c new file mode 100644 index 000000000..1236215ec --- /dev/null +++ b/drivers/media/platform/ti/cal/cal.c @@ -0,0 +1,1375 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TI Camera Access Layer (CAL) - Driver + * + * Copyright (c) 2015-2020 Texas Instruments Inc. + * + * Authors: + * Benoit Parrot <bparrot@ti.com> + * Laurent Pinchart <laurent.pinchart@ideasonboard.com> + */ + +#include <linux/clk.h> +#include <linux/interrupt.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/videodev2.h> + +#include <media/media-device.h> +#include <media/v4l2-async.h> +#include <media/v4l2-common.h> +#include <media/v4l2-device.h> +#include <media/videobuf2-core.h> +#include <media/videobuf2-dma-contig.h> + +#include "cal.h" +#include "cal_regs.h" + +MODULE_DESCRIPTION("TI CAL driver"); +MODULE_AUTHOR("Benoit Parrot, <bparrot@ti.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("0.1.0"); + +int cal_video_nr = -1; +module_param_named(video_nr, cal_video_nr, uint, 0644); +MODULE_PARM_DESC(video_nr, "videoX start number, -1 is autodetect"); + +unsigned int cal_debug; +module_param_named(debug, cal_debug, uint, 0644); +MODULE_PARM_DESC(debug, "activates debug info"); + +#ifdef CONFIG_VIDEO_TI_CAL_MC +#define CAL_MC_API_DEFAULT 1 +#else +#define CAL_MC_API_DEFAULT 0 +#endif + +bool cal_mc_api = CAL_MC_API_DEFAULT; +module_param_named(mc_api, cal_mc_api, bool, 0444); +MODULE_PARM_DESC(mc_api, "activates the MC API"); + +/* ------------------------------------------------------------------ + * Format Handling + * ------------------------------------------------------------------ + */ + +const struct cal_format_info 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, + }, +}; + +const unsigned int cal_num_formats = ARRAY_SIZE(cal_formats); + +const struct cal_format_info *cal_format_by_fourcc(u32 fourcc) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(cal_formats); ++i) { + if (cal_formats[i].fourcc == fourcc) + return &cal_formats[i]; + } + + return NULL; +} + +const struct cal_format_info *cal_format_by_code(u32 code) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(cal_formats); ++i) { + if (cal_formats[i].code == code) + return &cal_formats[i]; + } + + return NULL; +} + +/* ------------------------------------------------------------------ + * 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 + * ------------------------------------------------------------------ + */ + +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 < cal->data->num_csi2_phy; ++i) { + struct cal_camerarx *phy = cal->phy[i]; + + 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); + } +} + +/* ------------------------------------------------------------------ + * Context Management + * ------------------------------------------------------------------ + */ + +#define CAL_MAX_PIX_PROC 4 + +static int cal_reserve_pix_proc(struct cal_dev *cal) +{ + unsigned long ret; + + spin_lock(&cal->v4l2_dev.lock); + + ret = find_first_zero_bit(&cal->reserved_pix_proc_mask, CAL_MAX_PIX_PROC); + + if (ret == CAL_MAX_PIX_PROC) { + spin_unlock(&cal->v4l2_dev.lock); + return -ENOSPC; + } + + cal->reserved_pix_proc_mask |= BIT(ret); + + spin_unlock(&cal->v4l2_dev.lock); + + return ret; +} + +static void cal_release_pix_proc(struct cal_dev *cal, unsigned int pix_proc_num) +{ + spin_lock(&cal->v4l2_dev.lock); + + cal->reserved_pix_proc_mask &= ~BIT(pix_proc_num); + + spin_unlock(&cal->v4l2_dev.lock); +} + +static void cal_ctx_csi2_config(struct cal_ctx *ctx) +{ + u32 val; + + val = cal_read(ctx->cal, CAL_CSI2_CTX(ctx->phy->instance, ctx->csi2_ctx)); + cal_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 + */ + cal_set_field(&val, ctx->datatype, CAL_CSI2_CTX_DT_MASK); + cal_set_field(&val, ctx->vc, CAL_CSI2_CTX_VC_MASK); + cal_set_field(&val, ctx->v_fmt.fmt.pix.height, CAL_CSI2_CTX_LINES_MASK); + cal_set_field(&val, CAL_CSI2_CTX_ATT_PIX, CAL_CSI2_CTX_ATT_MASK); + cal_set_field(&val, CAL_CSI2_CTX_PACK_MODE_LINE, + CAL_CSI2_CTX_PACK_MODE_MASK); + cal_write(ctx->cal, CAL_CSI2_CTX(ctx->phy->instance, ctx->csi2_ctx), val); + ctx_dbg(3, ctx, "CAL_CSI2_CTX(%u, %u) = 0x%08x\n", + ctx->phy->instance, ctx->csi2_ctx, + cal_read(ctx->cal, CAL_CSI2_CTX(ctx->phy->instance, ctx->csi2_ctx))); +} + +static void cal_ctx_pix_proc_config(struct cal_ctx *ctx) +{ + u32 val, extract, pack; + + switch (ctx->fmtinfo->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->fmtinfo->bpp); + extract = CAL_PIX_PROC_EXTRACT_B8; + pack = CAL_PIX_PROC_PACK_B8; + break; + } + + val = cal_read(ctx->cal, CAL_PIX_PROC(ctx->pix_proc)); + cal_set_field(&val, extract, CAL_PIX_PROC_EXTRACT_MASK); + cal_set_field(&val, CAL_PIX_PROC_DPCMD_BYPASS, CAL_PIX_PROC_DPCMD_MASK); + cal_set_field(&val, CAL_PIX_PROC_DPCME_BYPASS, CAL_PIX_PROC_DPCME_MASK); + cal_set_field(&val, pack, CAL_PIX_PROC_PACK_MASK); + cal_set_field(&val, ctx->cport, CAL_PIX_PROC_CPORT_MASK); + cal_set_field(&val, 1, CAL_PIX_PROC_EN_MASK); + cal_write(ctx->cal, CAL_PIX_PROC(ctx->pix_proc), val); + ctx_dbg(3, ctx, "CAL_PIX_PROC(%u) = 0x%08x\n", ctx->pix_proc, + cal_read(ctx->cal, CAL_PIX_PROC(ctx->pix_proc))); +} + +static void cal_ctx_wr_dma_config(struct cal_ctx *ctx) +{ + unsigned int stride = ctx->v_fmt.fmt.pix.bytesperline; + u32 val; + + val = cal_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->dma_ctx)); + cal_set_field(&val, ctx->cport, CAL_WR_DMA_CTRL_CPORT_MASK); + cal_set_field(&val, ctx->v_fmt.fmt.pix.height, + CAL_WR_DMA_CTRL_YSIZE_MASK); + cal_set_field(&val, CAL_WR_DMA_CTRL_DTAG_PIX_DAT, + CAL_WR_DMA_CTRL_DTAG_MASK); + cal_set_field(&val, CAL_WR_DMA_CTRL_PATTERN_LINEAR, + CAL_WR_DMA_CTRL_PATTERN_MASK); + cal_set_field(&val, 1, CAL_WR_DMA_CTRL_STALL_RD_MASK); + cal_write(ctx->cal, CAL_WR_DMA_CTRL(ctx->dma_ctx), val); + ctx_dbg(3, ctx, "CAL_WR_DMA_CTRL(%d) = 0x%08x\n", ctx->dma_ctx, + cal_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->dma_ctx))); + + cal_write_field(ctx->cal, CAL_WR_DMA_OFST(ctx->dma_ctx), + stride / 16, CAL_WR_DMA_OFST_MASK); + ctx_dbg(3, ctx, "CAL_WR_DMA_OFST(%d) = 0x%08x\n", ctx->dma_ctx, + cal_read(ctx->cal, CAL_WR_DMA_OFST(ctx->dma_ctx))); + + val = cal_read(ctx->cal, CAL_WR_DMA_XSIZE(ctx->dma_ctx)); + /* 64 bit word means no skipping */ + cal_set_field(&val, 0, CAL_WR_DMA_XSIZE_XSKIP_MASK); + /* + * The XSIZE field is expressed in 64-bit units and prevents overflows + * in case of synchronization issues by limiting the number of bytes + * written per line. + */ + cal_set_field(&val, stride / 8, CAL_WR_DMA_XSIZE_MASK); + cal_write(ctx->cal, CAL_WR_DMA_XSIZE(ctx->dma_ctx), val); + ctx_dbg(3, ctx, "CAL_WR_DMA_XSIZE(%d) = 0x%08x\n", ctx->dma_ctx, + cal_read(ctx->cal, CAL_WR_DMA_XSIZE(ctx->dma_ctx))); +} + +void cal_ctx_set_dma_addr(struct cal_ctx *ctx, dma_addr_t addr) +{ + cal_write(ctx->cal, CAL_WR_DMA_ADDR(ctx->dma_ctx), addr); +} + +static void cal_ctx_wr_dma_enable(struct cal_ctx *ctx) +{ + u32 val = cal_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->dma_ctx)); + + cal_set_field(&val, CAL_WR_DMA_CTRL_MODE_CONST, + CAL_WR_DMA_CTRL_MODE_MASK); + cal_write(ctx->cal, CAL_WR_DMA_CTRL(ctx->dma_ctx), val); +} + +static void cal_ctx_wr_dma_disable(struct cal_ctx *ctx) +{ + u32 val = cal_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->dma_ctx)); + + cal_set_field(&val, CAL_WR_DMA_CTRL_MODE_DIS, + CAL_WR_DMA_CTRL_MODE_MASK); + cal_write(ctx->cal, CAL_WR_DMA_CTRL(ctx->dma_ctx), val); +} + +static bool cal_ctx_wr_dma_stopped(struct cal_ctx *ctx) +{ + bool stopped; + + spin_lock_irq(&ctx->dma.lock); + stopped = ctx->dma.state == CAL_DMA_STOPPED; + spin_unlock_irq(&ctx->dma.lock); + + return stopped; +} + +static int +cal_get_remote_frame_desc_entry(struct cal_camerarx *phy, + struct v4l2_mbus_frame_desc_entry *entry) +{ + struct v4l2_mbus_frame_desc fd; + int ret; + + ret = cal_camerarx_get_remote_frame_desc(phy, &fd); + if (ret) { + if (ret != -ENOIOCTLCMD) + dev_err(phy->cal->dev, + "Failed to get remote frame desc: %d\n", ret); + return ret; + } + + if (fd.num_entries == 0) { + dev_err(phy->cal->dev, + "No streams found in the remote frame descriptor\n"); + + return -ENODEV; + } + + if (fd.num_entries > 1) + dev_dbg(phy->cal->dev, + "Multiple streams not supported in remote frame descriptor, using the first one\n"); + + *entry = fd.entry[0]; + + return 0; +} + +int cal_ctx_prepare(struct cal_ctx *ctx) +{ + struct v4l2_mbus_frame_desc_entry entry; + int ret; + + ret = cal_get_remote_frame_desc_entry(ctx->phy, &entry); + + if (ret == -ENOIOCTLCMD) { + ctx->vc = 0; + ctx->datatype = CAL_CSI2_CTX_DT_ANY; + } else if (!ret) { + ctx_dbg(2, ctx, "Framedesc: len %u, vc %u, dt %#x\n", + entry.length, entry.bus.csi2.vc, entry.bus.csi2.dt); + + ctx->vc = entry.bus.csi2.vc; + ctx->datatype = entry.bus.csi2.dt; + } else { + return ret; + } + + ctx->use_pix_proc = !ctx->fmtinfo->meta; + + if (ctx->use_pix_proc) { + ret = cal_reserve_pix_proc(ctx->cal); + if (ret < 0) { + ctx_err(ctx, "Failed to reserve pix proc: %d\n", ret); + return ret; + } + + ctx->pix_proc = ret; + } + + return 0; +} + +void cal_ctx_unprepare(struct cal_ctx *ctx) +{ + if (ctx->use_pix_proc) + cal_release_pix_proc(ctx->cal, ctx->pix_proc); +} + +void cal_ctx_start(struct cal_ctx *ctx) +{ + struct cal_camerarx *phy = ctx->phy; + + /* + * Reset the frame number & sequence number, but only if the + * virtual channel is not already in use. + */ + + spin_lock(&phy->vc_lock); + + if (phy->vc_enable_count[ctx->vc]++ == 0) { + phy->vc_frame_number[ctx->vc] = 0; + phy->vc_sequence[ctx->vc] = 0; + } + + spin_unlock(&phy->vc_lock); + + ctx->dma.state = CAL_DMA_RUNNING; + + /* Configure the CSI-2, pixel processing and write DMA contexts. */ + cal_ctx_csi2_config(ctx); + if (ctx->use_pix_proc) + cal_ctx_pix_proc_config(ctx); + cal_ctx_wr_dma_config(ctx); + + /* Enable IRQ_WDMA_END and IRQ_WDMA_START. */ + cal_write(ctx->cal, CAL_HL_IRQENABLE_SET(1), + CAL_HL_IRQ_WDMA_END_MASK(ctx->dma_ctx)); + cal_write(ctx->cal, CAL_HL_IRQENABLE_SET(2), + CAL_HL_IRQ_WDMA_START_MASK(ctx->dma_ctx)); + + cal_ctx_wr_dma_enable(ctx); +} + +void cal_ctx_stop(struct cal_ctx *ctx) +{ + struct cal_camerarx *phy = ctx->phy; + long timeout; + + WARN_ON(phy->vc_enable_count[ctx->vc] == 0); + + spin_lock(&phy->vc_lock); + phy->vc_enable_count[ctx->vc]--; + spin_unlock(&phy->vc_lock); + + /* + * Request DMA stop and wait until it completes. If completion times + * out, forcefully disable the DMA. + */ + spin_lock_irq(&ctx->dma.lock); + ctx->dma.state = CAL_DMA_STOP_REQUESTED; + spin_unlock_irq(&ctx->dma.lock); + + timeout = wait_event_timeout(ctx->dma.wait, cal_ctx_wr_dma_stopped(ctx), + msecs_to_jiffies(500)); + if (!timeout) { + ctx_err(ctx, "failed to disable dma cleanly\n"); + cal_ctx_wr_dma_disable(ctx); + } + + /* Disable IRQ_WDMA_END and IRQ_WDMA_START. */ + cal_write(ctx->cal, CAL_HL_IRQENABLE_CLR(1), + CAL_HL_IRQ_WDMA_END_MASK(ctx->dma_ctx)); + cal_write(ctx->cal, CAL_HL_IRQENABLE_CLR(2), + CAL_HL_IRQ_WDMA_START_MASK(ctx->dma_ctx)); + + ctx->dma.state = CAL_DMA_STOPPED; + + /* Disable CSI2 context */ + cal_write(ctx->cal, CAL_CSI2_CTX(ctx->phy->instance, ctx->csi2_ctx), 0); + + /* Disable pix proc */ + if (ctx->use_pix_proc) + cal_write(ctx->cal, CAL_PIX_PROC(ctx->pix_proc), 0); +} + +/* ------------------------------------------------------------------ + * IRQ Handling + * ------------------------------------------------------------------ + */ + +/* + * Track a sequence number for each virtual channel, which is shared by + * all contexts using the same virtual channel. This is done using the + * CSI-2 frame number as a base. + */ +static void cal_update_seq_number(struct cal_ctx *ctx) +{ + struct cal_dev *cal = ctx->cal; + struct cal_camerarx *phy = ctx->phy; + u16 prev_frame_num, frame_num; + u8 vc = ctx->vc; + + frame_num = + cal_read(cal, CAL_CSI2_STATUS(phy->instance, ctx->csi2_ctx)) & + 0xffff; + + if (phy->vc_frame_number[vc] != frame_num) { + prev_frame_num = phy->vc_frame_number[vc]; + + if (prev_frame_num >= frame_num) + phy->vc_sequence[vc] += 1; + else + phy->vc_sequence[vc] += frame_num - prev_frame_num; + + phy->vc_frame_number[vc] = frame_num; + } +} + +static inline void cal_irq_wdma_start(struct cal_ctx *ctx) +{ + spin_lock(&ctx->dma.lock); + + if (ctx->dma.state == CAL_DMA_STOP_REQUESTED) { + /* + * If a stop is requested, disable the write DMA context + * immediately. The CAL_WR_DMA_CTRL_j.MODE field is shadowed, + * the current frame will complete and the DMA will then stop. + */ + cal_ctx_wr_dma_disable(ctx); + ctx->dma.state = CAL_DMA_STOP_PENDING; + } else if (!list_empty(&ctx->dma.queue) && !ctx->dma.pending) { + /* + * Otherwise, if a new buffer is available, queue it to the + * hardware. + */ + struct cal_buffer *buf; + dma_addr_t addr; + + buf = list_first_entry(&ctx->dma.queue, struct cal_buffer, + list); + addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); + cal_ctx_set_dma_addr(ctx, addr); + + ctx->dma.pending = buf; + list_del(&buf->list); + } + + spin_unlock(&ctx->dma.lock); + + cal_update_seq_number(ctx); +} + +static inline void cal_irq_wdma_end(struct cal_ctx *ctx) +{ + struct cal_buffer *buf = NULL; + + spin_lock(&ctx->dma.lock); + + /* If the DMA context was stopping, it is now stopped. */ + if (ctx->dma.state == CAL_DMA_STOP_PENDING) { + ctx->dma.state = CAL_DMA_STOPPED; + wake_up(&ctx->dma.wait); + } + + /* If a new buffer was queued, complete the current buffer. */ + if (ctx->dma.pending) { + buf = ctx->dma.active; + ctx->dma.active = ctx->dma.pending; + ctx->dma.pending = NULL; + } + + spin_unlock(&ctx->dma.lock); + + if (buf) { + buf->vb.vb2_buf.timestamp = ktime_get_ns(); + buf->vb.field = ctx->v_fmt.fmt.pix.field; + buf->vb.sequence = ctx->phy->vc_sequence[ctx->vc]; + + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); + } +} + +static void cal_irq_handle_wdma(struct cal_ctx *ctx, bool start, bool end) +{ + /* + * CAL HW interrupts are inherently racy. If we get both start and end + * interrupts, we don't know what has happened: did the DMA for a single + * frame start and end, or did one frame end and a new frame start? + * + * Usually for normal pixel frames we get the interrupts separately. If + * we do get both, we have to guess. The assumption in the code below is + * that the active vertical area is larger than the blanking vertical + * area, and thus it is more likely that we get the end of the old frame + * and the start of a new frame. + * + * However, for embedded data, which is only a few lines high, we always + * get both interrupts. Here the assumption is that we get both for the + * same frame. + */ + if (ctx->v_fmt.fmt.pix.height < 10) { + if (start) + cal_irq_wdma_start(ctx); + + if (end) + cal_irq_wdma_end(ctx); + } else { + if (end) + cal_irq_wdma_end(ctx); + + if (start) + cal_irq_wdma_start(ctx); + } +} + +static irqreturn_t cal_irq(int irq_cal, void *data) +{ + struct cal_dev *cal = data; + u32 status[3]; + unsigned int i; + + for (i = 0; i < 3; ++i) { + status[i] = cal_read(cal, CAL_HL_IRQSTATUS(i)); + if (status[i]) + cal_write(cal, CAL_HL_IRQSTATUS(i), status[i]); + } + + if (status[0]) { + if (status[0] & CAL_HL_IRQ_OCPO_ERR_MASK) + dev_err_ratelimited(cal->dev, "OCPO ERROR\n"); + + for (i = 0; i < cal->data->num_csi2_phy; ++i) { + if (status[0] & CAL_HL_IRQ_CIO_MASK(i)) { + u32 cio_stat = cal_read(cal, + CAL_CSI2_COMPLEXIO_IRQSTATUS(i)); + + dev_err_ratelimited(cal->dev, + "CIO%u error: %#08x\n", i, cio_stat); + + cal_write(cal, CAL_CSI2_COMPLEXIO_IRQSTATUS(i), + cio_stat); + } + + if (status[0] & CAL_HL_IRQ_VC_MASK(i)) { + u32 vc_stat = cal_read(cal, CAL_CSI2_VC_IRQSTATUS(i)); + + dev_err_ratelimited(cal->dev, + "CIO%u VC error: %#08x\n", + i, vc_stat); + + cal_write(cal, CAL_CSI2_VC_IRQSTATUS(i), vc_stat); + } + } + } + + for (i = 0; i < cal->num_contexts; ++i) { + bool end = !!(status[1] & CAL_HL_IRQ_WDMA_END_MASK(i)); + bool start = !!(status[2] & CAL_HL_IRQ_WDMA_START_MASK(i)); + + if (start || end) + cal_irq_handle_wdma(cal->ctx[i], start, end); + } + + return IRQ_HANDLED; +} + +/* ------------------------------------------------------------------ + * Asynchronous V4L2 subdev binding + * ------------------------------------------------------------------ + */ + +struct cal_v4l2_async_subdev { + struct v4l2_async_subdev asd; /* Must be first */ + 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; + int pad; + int ret; + + if (phy->source) { + phy_info(phy, "Rejecting subdev %s (Already set!!)", + subdev->name); + return 0; + } + + phy->source = subdev; + phy_dbg(1, phy, "Using source %s for capture\n", subdev->name); + + pad = media_entity_get_fwnode_pad(&subdev->entity, + of_fwnode_handle(phy->source_ep_node), + MEDIA_PAD_FL_SOURCE); + if (pad < 0) { + phy_err(phy, "Source %s has no connected source pad\n", + subdev->name); + return pad; + } + + ret = media_create_pad_link(&subdev->entity, pad, + &phy->subdev.entity, CAL_CAMERARX_PAD_SINK, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) { + phy_err(phy, "Failed to create media link for source %s\n", + subdev->name); + return ret; + } + + 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; + int ret; + + for (i = 0; i < cal->num_contexts; ++i) { + ret = cal_ctx_v4l2_register(cal->ctx[i]); + if (ret) + goto err_ctx_unreg; + } + + if (!cal_mc_api) + return 0; + + ret = v4l2_device_register_subdev_nodes(&cal->v4l2_dev); + if (ret) + goto err_ctx_unreg; + + return 0; + +err_ctx_unreg: + for (; i > 0; --i) { + if (!cal->ctx[i - 1]) + continue; + + cal_ctx_v4l2_unregister(cal->ctx[i - 1]); + } + + return ret; +} + +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_nf_init(&cal->notifier); + cal->notifier.ops = &cal_async_notifier_ops; + + for (i = 0; i < cal->data->num_csi2_phy; ++i) { + struct cal_camerarx *phy = cal->phy[i]; + struct cal_v4l2_async_subdev *casd; + struct fwnode_handle *fwnode; + + if (!phy->source_node) + continue; + + fwnode = of_fwnode_handle(phy->source_node); + casd = v4l2_async_nf_add_fwnode(&cal->notifier, + fwnode, + struct cal_v4l2_async_subdev); + if (IS_ERR(casd)) { + phy_err(phy, "Failed to add subdev to notifier\n"); + ret = PTR_ERR(casd); + goto error; + } + + casd->phy = phy; + } + + ret = v4l2_async_nf_register(&cal->v4l2_dev, &cal->notifier); + if (ret) { + cal_err(cal, "Error registering async notifier\n"); + goto error; + } + + return 0; + +error: + v4l2_async_nf_cleanup(&cal->notifier); + return ret; +} + +static void cal_async_notifier_unregister(struct cal_dev *cal) +{ + v4l2_async_nf_unregister(&cal->notifier); + v4l2_async_nf_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 < cal->num_contexts; 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)); + 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) +{ + 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 = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + ctx->cal = cal; + ctx->phy = cal->phy[inst]; + ctx->dma_ctx = inst; + ctx->csi2_ctx = inst; + ctx->cport = inst; + + ret = cal_ctx_v4l2_init(ctx); + if (ret) { + kfree(ctx); + return NULL; + } + + return ctx; +} + +static void cal_ctx_destroy(struct cal_ctx *ctx) +{ + cal_ctx_v4l2_cleanup(ctx); + + kfree(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 = cal_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 = cal_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_init_camerarx_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; +} + +static int cal_probe(struct platform_device *pdev) +{ + struct cal_dev *cal; + 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_init_camerarx_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_resume_and_get(&pdev->dev); + if (ret) + goto error_pm_runtime; + + cal_get_hwinfo(cal); + pm_runtime_put_sync(&pdev->dev); + + /* Initialize the media device. */ + ret = cal_media_init(cal); + if (ret < 0) + goto error_pm_runtime; + + /* 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]->source_node) + connected = true; + } + + if (!connected) { + cal_err(cal, "Neither port is configured, no point in staying up\n"); + ret = -ENODEV; + goto error_camerarx; + } + + /* Create contexts. */ + for (i = 0; i < cal->data->num_csi2_phy; ++i) { + if (!cal->phy[i]->source_node) + continue; + + cal->ctx[cal->num_contexts] = cal_ctx_create(cal, i); + if (!cal->ctx[cal->num_contexts]) { + cal_err(cal, "Failed to create context %u\n", cal->num_contexts); + ret = -ENODEV; + goto error_context; + } + + cal->num_contexts++; + } + + /* Register the media device. */ + ret = cal_media_register(cal); + if (ret) + goto error_context; + + return 0; + +error_context: + for (i = 0; i < cal->num_contexts; i++) + cal_ctx_destroy(cal->ctx[i]); + +error_camerarx: + for (i = 0; i < cal->data->num_csi2_phy; i++) + cal_camerarx_destroy(cal->phy[i]); + + cal_media_cleanup(cal); + +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; + int ret; + + cal_dbg(1, cal, "Removing %s\n", CAL_MODULE_NAME); + + ret = pm_runtime_resume_and_get(&pdev->dev); + + cal_media_unregister(cal); + + for (i = 0; i < cal->data->num_csi2_phy; i++) + cal_camerarx_disable(cal->phy[i]); + + for (i = 0; i < cal->num_contexts; i++) + cal_ctx_destroy(cal->ctx[i]); + + for (i = 0; i < cal->data->num_csi2_phy; i++) + cal_camerarx_destroy(cal->phy[i]); + + cal_media_cleanup(cal); + + if (ret >= 0) + 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); + unsigned int i; + u32 val; + + if (cal->data->flags & DRA72_CAL_PRE_ES2_LDO_DISABLE) { + /* + * Apply errata on both port everytime we (re-)enable + * the clock + */ + for (i = 0; i < cal->data->num_csi2_phy; i++) + cal_camerarx_i913_errata(cal->phy[i]); + } + + /* + * Enable global interrupts that are not related to a particular + * CAMERARAX or context. + */ + cal_write(cal, CAL_HL_IRQENABLE_SET(0), CAL_HL_IRQ_OCPO_ERR_MASK); + + val = cal_read(cal, CAL_CTRL); + cal_set_field(&val, CAL_CTRL_BURSTSIZE_BURST128, + CAL_CTRL_BURSTSIZE_MASK); + cal_set_field(&val, 0xf, CAL_CTRL_TAGCNT_MASK); + cal_set_field(&val, CAL_CTRL_POSTED_WRITES_NONPOSTED, + CAL_CTRL_POSTED_WRITES_MASK); + cal_set_field(&val, 0xff, CAL_CTRL_MFLAGL_MASK); + cal_set_field(&val, 0xff, CAL_CTRL_MFLAGH_MASK); + cal_write(cal, CAL_CTRL, val); + cal_dbg(3, cal, "CAL_CTRL = 0x%08x\n", cal_read(cal, CAL_CTRL)); + + 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); |