diff options
Diffstat (limited to 'drivers/media/platform/ti-vpe/cal.c')
| -rw-r--r-- | drivers/media/platform/ti-vpe/cal.c | 1163 |
1 files changed, 0 insertions, 1163 deletions
diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c deleted file mode 100644 index 76fe7a8b33f6..000000000000 --- a/drivers/media/platform/ti-vpe/cal.c +++ /dev/null @@ -1,1163 +0,0 @@ -// 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 - * ------------------------------------------------------------------ - */ - -static void cal_ctx_csi2_config(struct cal_ctx *ctx) -{ - u32 val; - - val = cal_read(ctx->cal, CAL_CSI2_CTX0(ctx->index)); - 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, 0x1, CAL_CSI2_CTX_DT_MASK); - cal_set_field(&val, 0, 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_CTX0(ctx->index), val); - ctx_dbg(3, ctx, "CAL_CSI2_CTX0(%d) = 0x%08x\n", ctx->index, - cal_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->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->index)); - 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->index), val); - ctx_dbg(3, ctx, "CAL_PIX_PROC(%d) = 0x%08x\n", ctx->index, - cal_read(ctx->cal, CAL_PIX_PROC(ctx->index))); -} - -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->index)); - 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_MODE_CONST, - CAL_WR_DMA_CTRL_MODE_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->index), val); - ctx_dbg(3, ctx, "CAL_WR_DMA_CTRL(%d) = 0x%08x\n", ctx->index, - cal_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->index))); - - cal_write_field(ctx->cal, CAL_WR_DMA_OFST(ctx->index), - stride / 16, CAL_WR_DMA_OFST_MASK); - ctx_dbg(3, ctx, "CAL_WR_DMA_OFST(%d) = 0x%08x\n", ctx->index, - cal_read(ctx->cal, CAL_WR_DMA_OFST(ctx->index))); - - val = cal_read(ctx->cal, CAL_WR_DMA_XSIZE(ctx->index)); - /* 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->index), val); - ctx_dbg(3, ctx, "CAL_WR_DMA_XSIZE(%d) = 0x%08x\n", ctx->index, - cal_read(ctx->cal, CAL_WR_DMA_XSIZE(ctx->index))); - - val = cal_read(ctx->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(ctx->cal, CAL_CTRL, val); - ctx_dbg(3, ctx, "CAL_CTRL = 0x%08x\n", cal_read(ctx->cal, CAL_CTRL)); -} - -void cal_ctx_set_dma_addr(struct cal_ctx *ctx, dma_addr_t addr) -{ - cal_write(ctx->cal, CAL_WR_DMA_ADDR(ctx->index), addr); -} - -static void cal_ctx_wr_dma_disable(struct cal_ctx *ctx) -{ - u32 val = cal_read(ctx->cal, CAL_WR_DMA_CTRL(ctx->index)); - - 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->index), 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; -} - -void cal_ctx_start(struct cal_ctx *ctx) -{ - ctx->sequence = 0; - ctx->dma.state = CAL_DMA_RUNNING; - - /* Configure the CSI-2, pixel processing and write DMA contexts. */ - cal_ctx_csi2_config(ctx); - 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_MASK(ctx->index)); - cal_write(ctx->cal, CAL_HL_IRQENABLE_SET(2), - CAL_HL_IRQ_MASK(ctx->index)); -} - -void cal_ctx_stop(struct cal_ctx *ctx) -{ - long timeout; - - /* - * 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_MASK(ctx->index)); - cal_write(ctx->cal, CAL_HL_IRQENABLE_CLR(2), - CAL_HL_IRQ_MASK(ctx->index)); - - ctx->dma.state = CAL_DMA_STOPPED; -} - -/* ------------------------------------------------------------------ - * IRQ Handling - * ------------------------------------------------------------------ - */ - -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); -} - -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->sequence++; - vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); - } -} - -static irqreturn_t cal_irq(int irq_cal, void *data) -{ - struct cal_dev *cal = data; - u32 status; - - status = cal_read(cal, CAL_HL_IRQSTATUS(0)); - if (status) { - unsigned int i; - - cal_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->data->num_csi2_phy; ++i) { - if (status & 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); - } - } - } - - /* Check which DMA just finished */ - status = cal_read(cal, CAL_HL_IRQSTATUS(1)); - if (status) { - unsigned int i; - - /* Clear Interrupt status */ - cal_write(cal, CAL_HL_IRQSTATUS(1), status); - - for (i = 0; i < ARRAY_SIZE(cal->ctx); ++i) { - if (status & CAL_HL_IRQ_MASK(i)) - cal_irq_wdma_end(cal->ctx[i]); - } - } - - /* Check which DMA just started */ - status = cal_read(cal, CAL_HL_IRQSTATUS(2)); - if (status) { - unsigned int i; - - /* Clear Interrupt status */ - cal_write(cal, CAL_HL_IRQSTATUS(2), status); - - for (i = 0; i < ARRAY_SIZE(cal->ctx); ++i) { - if (status & CAL_HL_IRQ_MASK(i)) - cal_irq_wdma_start(cal->ctx[i]); - } - } - - 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->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); - - pad = media_entity_get_fwnode_pad(&subdev->entity, - of_fwnode_handle(phy->sensor_ep_node), - MEDIA_PAD_FL_SOURCE); - if (pad < 0) { - phy_err(phy, "Sensor %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 sensor %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 = 0; - - for (i = 0; i < ARRAY_SIZE(cal->ctx); ++i) { - if (cal->ctx[i]) - cal_ctx_v4l2_register(cal->ctx[i]); - } - - if (cal_mc_api) - ret = v4l2_device_register_subdev_nodes(&cal->v4l2_dev); - - 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_notifier_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->sensor_node) - continue; - - fwnode = of_fwnode_handle(phy->sensor_node); - casd = v4l2_async_notifier_add_fwnode_subdev(&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_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 = 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; - 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_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]->sensor_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]->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); - } - -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 < ARRAY_SIZE(cal->phy); i++) { - if (cal->phy[i]) - cal_camerarx_disable(cal->phy[i]); - } - - cal_media_cleanup(cal); - - for (i = 0; i < cal->data->num_csi2_phy; i++) - cal_camerarx_destroy(cal->phy[i]); - - 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; - - 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); - - 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); |