/* * SoC-camera host driver for Renesas R-Car VIN unit * * Copyright (C) 2011-2013 Renesas Solutions Corp. * Copyright (C) 2013 Cogent Embedded, Inc., * * Based on V4L2 Driver for SuperH Mobile CEU interface "sh_mobile_ceu_camera.c" * * Copyright (C) 2008 Magnus Damm * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "soc_scale_crop.h" #define DRV_NAME "rcar_vin" /* Register offsets for R-Car VIN */ #define VNMC_REG 0x00 /* Video n Main Control Register */ #define VNMS_REG 0x04 /* Video n Module Status Register */ #define VNFC_REG 0x08 /* Video n Frame Capture Register */ #define VNSLPRC_REG 0x0C /* Video n Start Line Pre-Clip Register */ #define VNELPRC_REG 0x10 /* Video n End Line Pre-Clip Register */ #define VNSPPRC_REG 0x14 /* Video n Start Pixel Pre-Clip Register */ #define VNEPPRC_REG 0x18 /* Video n End Pixel Pre-Clip Register */ #define VNSLPOC_REG 0x1C /* Video n Start Line Post-Clip Register */ #define VNELPOC_REG 0x20 /* Video n End Line Post-Clip Register */ #define VNSPPOC_REG 0x24 /* Video n Start Pixel Post-Clip Register */ #define VNEPPOC_REG 0x28 /* Video n End Pixel Post-Clip Register */ #define VNIS_REG 0x2C /* Video n Image Stride Register */ #define VNMB_REG(m) (0x30 + ((m) << 2)) /* Video n Memory Base m Register */ #define VNIE_REG 0x40 /* Video n Interrupt Enable Register */ #define VNINTS_REG 0x44 /* Video n Interrupt Status Register */ #define VNSI_REG 0x48 /* Video n Scanline Interrupt Register */ #define VNMTC_REG 0x4C /* Video n Memory Transfer Control Register */ #define VNYS_REG 0x50 /* Video n Y Scale Register */ #define VNXS_REG 0x54 /* Video n X Scale Register */ #define VNDMR_REG 0x58 /* Video n Data Mode Register */ #define VNDMR2_REG 0x5C /* Video n Data Mode Register 2 */ #define VNUVAOF_REG 0x60 /* Video n UV Address Offset Register */ /* Register bit fields for R-Car VIN */ /* Video n Main Control Register bits */ #define VNMC_FOC (1 << 21) #define VNMC_YCAL (1 << 19) #define VNMC_INF_YUV8_BT656 (0 << 16) #define VNMC_INF_YUV8_BT601 (1 << 16) #define VNMC_INF_YUV16 (5 << 16) #define VNMC_VUP (1 << 10) #define VNMC_IM_ODD (0 << 3) #define VNMC_IM_ODD_EVEN (1 << 3) #define VNMC_IM_EVEN (2 << 3) #define VNMC_IM_FULL (3 << 3) #define VNMC_BPS (1 << 1) #define VNMC_ME (1 << 0) /* Video n Module Status Register bits */ #define VNMS_FBS_MASK (3 << 3) #define VNMS_FBS_SHIFT 3 #define VNMS_AV (1 << 1) #define VNMS_CA (1 << 0) /* Video n Frame Capture Register bits */ #define VNFC_C_FRAME (1 << 1) #define VNFC_S_FRAME (1 << 0) /* Video n Interrupt Enable Register bits */ #define VNIE_FIE (1 << 4) #define VNIE_EFE (1 << 1) /* Video n Data Mode Register bits */ #define VNDMR_EXRGB (1 << 8) #define VNDMR_BPSM (1 << 4) #define VNDMR_DTMD_YCSEP (1 << 1) #define VNDMR_DTMD_ARGB1555 (1 << 0) /* Video n Data Mode Register 2 bits */ #define VNDMR2_VPS (1 << 30) #define VNDMR2_HPS (1 << 29) #define VNDMR2_FTEV (1 << 17) #define VIN_MAX_WIDTH 2048 #define VIN_MAX_HEIGHT 2048 enum chip_id { RCAR_H2, RCAR_H1, RCAR_M1, RCAR_E1, }; enum rcar_vin_state { STOPPED = 0, RUNNING, STOPPING, }; struct rcar_vin_priv { void __iomem *base; spinlock_t lock; int sequence; /* State of the VIN module in capturing mode */ enum rcar_vin_state state; struct rcar_vin_platform_data *pdata; struct soc_camera_host ici; struct list_head capture; #define MAX_BUFFER_NUM 3 struct vb2_buffer *queue_buf[MAX_BUFFER_NUM]; struct vb2_alloc_ctx *alloc_ctx; enum v4l2_field field; unsigned int vb_count; unsigned int nr_hw_slots; bool request_to_stop; struct completion capture_stop; enum chip_id chip; }; #define is_continuous_transfer(priv) (priv->vb_count > MAX_BUFFER_NUM) struct rcar_vin_buffer { struct vb2_buffer vb; struct list_head list; }; #define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \ struct rcar_vin_buffer, \ vb)->list) struct rcar_vin_cam { /* VIN offsets within the camera output, before the VIN scaler */ unsigned int vin_left; unsigned int vin_top; /* Client output, as seen by the VIN */ unsigned int width; unsigned int height; /* * User window from S_CROP / G_CROP, produced by client cropping and * scaling, VIN scaling and VIN cropping, mapped back onto the client * input window */ struct v4l2_rect subrect; /* Camera cropping rectangle */ struct v4l2_rect rect; const struct soc_mbus_pixelfmt *extra_fmt; }; /* * .queue_setup() is called to check whether the driver can accept the requested * number of buffers and to fill in plane sizes for the current frame format if * required */ static int rcar_vin_videobuf_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, unsigned int *count, unsigned int *num_planes, unsigned int sizes[], void *alloc_ctxs[]) { struct soc_camera_device *icd = soc_camera_from_vb2q(vq); struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; if (fmt) { const struct soc_camera_format_xlate *xlate; unsigned int bytes_per_line; int ret; xlate = soc_camera_xlate_by_fourcc(icd, fmt->fmt.pix.pixelformat); if (!xlate) return -EINVAL; ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width, xlate->host_fmt); if (ret < 0) return ret; bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret); ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line, fmt->fmt.pix.height); if (ret < 0) return ret; sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret); } else { /* Called from VIDIOC_REQBUFS or in compatibility mode */ sizes[0] = icd->sizeimage; } alloc_ctxs[0] = priv->alloc_ctx; if (!vq->num_buffers) priv->sequence = 0; if (!*count) *count = 2; priv->vb_count = *count; *num_planes = 1; /* Number of hardware slots */ if (is_continuous_transfer(priv)) priv->nr_hw_slots = MAX_BUFFER_NUM; else priv->nr_hw_slots = 1; dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]); return 0; } static int rcar_vin_setup(struct rcar_vin_priv *priv) { struct soc_camera_device *icd = priv->ici.icd; struct rcar_vin_cam *cam = icd->host_priv; u32 vnmc, dmr, interrupts; bool progressive = false, output_is_yuv = false; switch (priv->field) { case V4L2_FIELD_TOP: vnmc = VNMC_IM_ODD; break; case V4L2_FIELD_BOTTOM: vnmc = VNMC_IM_EVEN; break; case V4L2_FIELD_INTERLACED: case V4L2_FIELD_INTERLACED_TB: vnmc = VNMC_IM_FULL; break; case V4L2_FIELD_INTERLACED_BT: vnmc = VNMC_IM_FULL | VNMC_FOC; break; case V4L2_FIELD_NONE: if (is_continuous_transfer(priv)) { vnmc = VNMC_IM_ODD_EVEN; progressive = true; } else { vnmc = VNMC_IM_ODD; } break; default: vnmc = VNMC_IM_ODD; break; } /* input interface */ switch (icd->current_fmt->code) { case V4L2_MBUS_FMT_YUYV8_1X16: /* BT.601/BT.1358 16bit YCbCr422 */ vnmc |= VNMC_INF_YUV16; break; case V4L2_MBUS_FMT_YUYV8_2X8: /* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */ vnmc |= priv->pdata->flags & RCAR_VIN_BT656 ? VNMC_INF_YUV8_BT656 : VNMC_INF_YUV8_BT601; default: break; } /* output format */ switch (icd->current_fmt->host_fmt->fourcc) { case V4L2_PIX_FMT_NV16: iowrite32(ALIGN(cam->width * cam->height, 0x80), priv->base + VNUVAOF_REG); dmr = VNDMR_DTMD_YCSEP; output_is_yuv = true; break; case V4L2_PIX_FMT_YUYV: dmr = VNDMR_BPSM; output_is_yuv = true; break; case V4L2_PIX_FMT_UYVY: dmr = 0; output_is_yuv = true; break; case V4L2_PIX_FMT_RGB555X: dmr = VNDMR_DTMD_ARGB1555; break; case V4L2_PIX_FMT_RGB565: dmr = 0; break; case V4L2_PIX_FMT_RGB32: if (priv->chip == RCAR_H2 || priv->chip == RCAR_H1 || priv->chip == RCAR_E1) { dmr = VNDMR_EXRGB; break; } default: dev_warn(icd->parent, "Invalid fourcc format (0x%x)\n", icd->current_fmt->host_fmt->fourcc); return -EINVAL; } /* Always update on field change */ vnmc |= VNMC_VUP; /* If input and output use the same colorspace, use bypass mode */ if (output_is_yuv) vnmc |= VNMC_BPS; /* progressive or interlaced mode */ interrupts = progressive ? VNIE_FIE | VNIE_EFE : VNIE_EFE; /* ack interrupts */ iowrite32(interrupts, priv->base + VNINTS_REG); /* enable interrupts */ iowrite32(interrupts, priv->base + VNIE_REG); /* start capturing */ iowrite32(dmr, priv->base + VNDMR_REG); iowrite32(vnmc | VNMC_ME, priv->base + VNMC_REG); return 0; } static void rcar_vin_capture(struct rcar_vin_priv *priv) { if (is_continuous_transfer(priv)) /* Continuous Frame Capture Mode */ iowrite32(VNFC_C_FRAME, priv->base + VNFC_REG); else /* Single Frame Capture Mode */ iowrite32(VNFC_S_FRAME, priv->base + VNFC_REG); } static void rcar_vin_request_capture_stop(struct rcar_vin_priv *priv) { priv->state = STOPPING; /* set continuous & single transfer off */ iowrite32(0, priv->base + VNFC_REG); /* disable capture (release DMA buffer), reset */ iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME, priv->base + VNMC_REG); /* update the status if stopped already */ if (!(ioread32(priv->base + VNMS_REG) & VNMS_CA)) priv->state = STOPPED; } static int rcar_vin_get_free_hw_slot(struct rcar_vin_priv *priv) { int slot; for (slot = 0; slot < priv->nr_hw_slots; slot++) if (priv->queue_buf[slot] == NULL) return slot; return -1; } static int rcar_vin_hw_ready(struct rcar_vin_priv *priv) { /* Ensure all HW slots are filled */ return rcar_vin_get_free_hw_slot(priv) < 0 ? 1 : 0; } /* Moves a buffer from the queue to the HW slots */ static int rcar_vin_fill_hw_slot(struct rcar_vin_priv *priv) { struct vb2_buffer *vb; dma_addr_t phys_addr_top; int slot; if (list_empty(&priv->capture)) return 0; /* Find a free HW slot */ slot = rcar_vin_get_free_hw_slot(priv); if (slot < 0) return 0; vb = &list_entry(priv->capture.next, struct rcar_vin_buffer, list)->vb; list_del_init(to_buf_list(vb)); priv->queue_buf[slot] = vb; phys_addr_top = vb2_dma_contig_plane_dma_addr(vb, 0); iowrite32(phys_addr_top, priv->base + VNMB_REG(slot)); return 1; } static void rcar_vin_videobuf_queue(struct vb2_buffer *vb) { struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; unsigned long size; size = icd->sizeimage; if (vb2_plane_size(vb, 0) < size) { dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n", vb->v4l2_buf.index, vb2_plane_size(vb, 0), size); goto error; } vb2_set_plane_payload(vb, 0, size); dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__, vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); spin_lock_irq(&priv->lock); list_add_tail(to_buf_list(vb), &priv->capture); rcar_vin_fill_hw_slot(priv); /* If we weren't running, and have enough buffers, start capturing! */ if (priv->state != RUNNING && rcar_vin_hw_ready(priv)) { if (rcar_vin_setup(priv)) { /* Submit error */ list_del_init(to_buf_list(vb)); spin_unlock_irq(&priv->lock); goto error; } priv->request_to_stop = false; init_completion(&priv->capture_stop); priv->state = RUNNING; rcar_vin_capture(priv); } spin_unlock_irq(&priv->lock); return; error: vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); } static void rcar_vin_videobuf_release(struct vb2_buffer *vb) { struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; unsigned int i; int buf_in_use = 0; spin_lock_irq(&priv->lock); /* Is the buffer in use by the VIN hardware? */ for (i = 0; i < MAX_BUFFER_NUM; i++) { if (priv->queue_buf[i] == vb) { buf_in_use = 1; break; } } if (buf_in_use) { while (priv->state != STOPPED) { /* issue stop if running */ if (priv->state == RUNNING) rcar_vin_request_capture_stop(priv); /* wait until capturing has been stopped */ if (priv->state == STOPPING) { priv->request_to_stop = true; spin_unlock_irq(&priv->lock); wait_for_completion(&priv->capture_stop); spin_lock_irq(&priv->lock); } } /* * Capturing has now stopped. The buffer we have been asked * to release could be any of the current buffers in use, so * release all buffers that are in use by HW */ for (i = 0; i < MAX_BUFFER_NUM; i++) { if (priv->queue_buf[i]) { vb2_buffer_done(priv->queue_buf[i], VB2_BUF_STATE_ERROR); priv->queue_buf[i] = NULL; } } } else { list_del_init(to_buf_list(vb)); } spin_unlock_irq(&priv->lock); } static int rcar_vin_videobuf_init(struct vb2_buffer *vb) { INIT_LIST_HEAD(to_buf_list(vb)); return 0; } static int rcar_vin_stop_streaming(struct vb2_queue *vq) { struct soc_camera_device *icd = soc_camera_from_vb2q(vq); struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; struct list_head *buf_head, *tmp; spin_lock_irq(&priv->lock); list_for_each_safe(buf_head, tmp, &priv->capture) list_del_init(buf_head); spin_unlock_irq(&priv->lock); return 0; } static struct vb2_ops rcar_vin_vb2_ops = { .queue_setup = rcar_vin_videobuf_setup, .buf_init = rcar_vin_videobuf_init, .buf_cleanup = rcar_vin_videobuf_release, .buf_queue = rcar_vin_videobuf_queue, .stop_streaming = rcar_vin_stop_streaming, .wait_prepare = soc_camera_unlock, .wait_finish = soc_camera_lock, }; static irqreturn_t rcar_vin_irq(int irq, void *data) { struct rcar_vin_priv *priv = data; u32 int_status; bool can_run = false, hw_stopped; int slot; unsigned int handled = 0; spin_lock(&priv->lock); int_status = ioread32(priv->base + VNINTS_REG); if (!int_status) goto done; /* ack interrupts */ iowrite32(int_status, priv->base + VNINTS_REG); handled = 1; /* nothing to do if capture status is 'STOPPED' */ if (priv->state == STOPPED) goto done; hw_stopped = !(ioread32(priv->base + VNMS_REG) & VNMS_CA); if (!priv->request_to_stop) { if (is_continuous_transfer(priv)) slot = (ioread32(priv->base + VNMS_REG) & VNMS_FBS_MASK) >> VNMS_FBS_SHIFT; else slot = 0; priv->queue_buf[slot]->v4l2_buf.field = priv->field; priv->queue_buf[slot]->v4l2_buf.sequence = priv->sequence++; do_gettimeofday(&priv->queue_buf[slot]->v4l2_buf.timestamp); vb2_buffer_done(priv->queue_buf[slot], VB2_BUF_STATE_DONE); priv->queue_buf[slot] = NULL; if (priv->state != STOPPING) can_run = rcar_vin_fill_hw_slot(priv); if (hw_stopped || !can_run) { priv->state = STOPPED; } else if (is_continuous_transfer(priv) && list_empty(&priv->capture) && priv->state == RUNNING) { /* * The continuous capturing requires an explicit stop * operation when there is no buffer to be set into * the VnMBm registers. */ rcar_vin_request_capture_stop(priv); } else { rcar_vin_capture(priv); } } else if (hw_stopped) { priv->state = STOPPED; priv->request_to_stop = false; complete(&priv->capture_stop); } done: spin_unlock(&priv->lock); return IRQ_RETVAL(handled); } static int rcar_vin_add_device(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; int i; for (i = 0; i < MAX_BUFFER_NUM; i++) priv->queue_buf[i] = NULL; pm_runtime_get_sync(ici->v4l2_dev.dev); dev_dbg(icd->parent, "R-Car VIN driver attached to camera %d\n", icd->devnum); return 0; } static void rcar_vin_remove_device(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; struct vb2_buffer *vb; int i; /* disable capture, disable interrupts */ iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME, priv->base + VNMC_REG); iowrite32(0, priv->base + VNIE_REG); priv->state = STOPPED; priv->request_to_stop = false; /* make sure active buffer is cancelled */ spin_lock_irq(&priv->lock); for (i = 0; i < MAX_BUFFER_NUM; i++) { vb = priv->queue_buf[i]; if (vb) { list_del_init(to_buf_list(vb)); vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); } } spin_unlock_irq(&priv->lock); pm_runtime_put(ici->v4l2_dev.dev); dev_dbg(icd->parent, "R-Car VIN driver detached from camera %d\n", icd->devnum); } /* Called with .host_lock held */ static int rcar_vin_clock_start(struct soc_camera_host *ici) { /* VIN does not have "mclk" */ return 0; } /* Called with .host_lock held */ static void rcar_vin_clock_stop(struct soc_camera_host *ici) { /* VIN does not have "mclk" */ } /* rect is guaranteed to not exceed the scaled camera rectangle */ static int rcar_vin_set_rect(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_cam *cam = icd->host_priv; struct rcar_vin_priv *priv = ici->priv; unsigned int left_offset, top_offset; unsigned char dsize = 0; struct v4l2_rect *cam_subrect = &cam->subrect; dev_dbg(icd->parent, "Crop %ux%u@%u:%u\n", icd->user_width, icd->user_height, cam->vin_left, cam->vin_top); left_offset = cam->vin_left; top_offset = cam->vin_top; if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_RGB32 && priv->chip == RCAR_E1) dsize = 1; dev_dbg(icd->parent, "Cam %ux%u@%u:%u\n", cam->width, cam->height, cam->vin_left, cam->vin_top); dev_dbg(icd->parent, "Cam subrect %ux%u@%u:%u\n", cam_subrect->width, cam_subrect->height, cam_subrect->left, cam_subrect->top); /* Set Start/End Pixel/Line Pre-Clip */ iowrite32(left_offset << dsize, priv->base + VNSPPRC_REG); iowrite32((left_offset + cam->width - 1) << dsize, priv->base + VNEPPRC_REG); switch (priv->field) { case V4L2_FIELD_INTERLACED: case V4L2_FIELD_INTERLACED_TB: case V4L2_FIELD_INTERLACED_BT: iowrite32(top_offset / 2, priv->base + VNSLPRC_REG); iowrite32((top_offset + cam->height) / 2 - 1, priv->base + VNELPRC_REG); break; default: iowrite32(top_offset, priv->base + VNSLPRC_REG); iowrite32(top_offset + cam->height - 1, priv->base + VNELPRC_REG); break; } /* Set Start/End Pixel/Line Post-Clip */ iowrite32(0, priv->base + VNSPPOC_REG); iowrite32(0, priv->base + VNSLPOC_REG); iowrite32((cam_subrect->width - 1) << dsize, priv->base + VNEPPOC_REG); switch (priv->field) { case V4L2_FIELD_INTERLACED: case V4L2_FIELD_INTERLACED_TB: case V4L2_FIELD_INTERLACED_BT: iowrite32(cam_subrect->height / 2 - 1, priv->base + VNELPOC_REG); break; default: iowrite32(cam_subrect->height - 1, priv->base + VNELPOC_REG); break; } iowrite32(ALIGN(cam->width, 0x10), priv->base + VNIS_REG); return 0; } static void capture_stop_preserve(struct rcar_vin_priv *priv, u32 *vnmc) { *vnmc = ioread32(priv->base + VNMC_REG); /* module disable */ iowrite32(*vnmc & ~VNMC_ME, priv->base + VNMC_REG); } static void capture_restore(struct rcar_vin_priv *priv, u32 vnmc) { unsigned long timeout = jiffies + 10 * HZ; /* * Wait until the end of the current frame. It can take a long time, * but if it has been aborted by a MRST1 reset, it should exit sooner. */ while ((ioread32(priv->base + VNMS_REG) & VNMS_AV) && time_before(jiffies, timeout)) msleep(1); if (time_after(jiffies, timeout)) { dev_err(priv->ici.v4l2_dev.dev, "Timeout waiting for frame end! Interface problem?\n"); return; } iowrite32(vnmc, priv->base + VNMC_REG); } #define VIN_MBUS_FLAGS (V4L2_MBUS_MASTER | \ V4L2_MBUS_PCLK_SAMPLE_RISING | \ V4L2_MBUS_HSYNC_ACTIVE_HIGH | \ V4L2_MBUS_HSYNC_ACTIVE_LOW | \ V4L2_MBUS_VSYNC_ACTIVE_HIGH | \ V4L2_MBUS_VSYNC_ACTIVE_LOW | \ V4L2_MBUS_DATA_ACTIVE_HIGH) static int rcar_vin_set_bus_param(struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct v4l2_mbus_config cfg; unsigned long common_flags; u32 vnmc; u32 val; int ret; capture_stop_preserve(priv, &vnmc); ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); if (!ret) { common_flags = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS); if (!common_flags) { dev_warn(icd->parent, "MBUS flags incompatible: camera 0x%x, host 0x%x\n", cfg.flags, VIN_MBUS_FLAGS); return -EINVAL; } } else if (ret != -ENOIOCTLCMD) { return ret; } else { common_flags = VIN_MBUS_FLAGS; } /* Make choises, based on platform preferences */ if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) && (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) { if (priv->pdata->flags & RCAR_VIN_HSYNC_ACTIVE_LOW) common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH; else common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW; } if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) && (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) { if (priv->pdata->flags & RCAR_VIN_VSYNC_ACTIVE_LOW) common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH; else common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW; } cfg.flags = common_flags; ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg); if (ret < 0 && ret != -ENOIOCTLCMD) return ret; val = priv->field == V4L2_FIELD_NONE ? VNDMR2_FTEV : 0; if (!(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) val |= VNDMR2_VPS; if (!(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) val |= VNDMR2_HPS; iowrite32(val, priv->base + VNDMR2_REG); ret = rcar_vin_set_rect(icd); if (ret < 0) return ret; capture_restore(priv, vnmc); return 0; } static int rcar_vin_try_bus_param(struct soc_camera_device *icd, unsigned char buswidth) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct v4l2_mbus_config cfg; int ret; ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); if (ret == -ENOIOCTLCMD) return 0; else if (ret) return ret; if (buswidth > 24) return -EINVAL; /* check is there common mbus flags */ ret = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS); if (ret) return 0; dev_warn(icd->parent, "MBUS flags incompatible: camera 0x%x, host 0x%x\n", cfg.flags, VIN_MBUS_FLAGS); return -EINVAL; } static bool rcar_vin_packing_supported(const struct soc_mbus_pixelfmt *fmt) { return fmt->packing == SOC_MBUS_PACKING_NONE || (fmt->bits_per_sample > 8 && fmt->packing == SOC_MBUS_PACKING_EXTEND16); } static const struct soc_mbus_pixelfmt rcar_vin_formats[] = { { .fourcc = V4L2_PIX_FMT_NV16, .name = "NV16", .bits_per_sample = 8, .packing = SOC_MBUS_PACKING_2X8_PADHI, .order = SOC_MBUS_ORDER_LE, .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C, }, { .fourcc = V4L2_PIX_FMT_UYVY, .name = "UYVY", .bits_per_sample = 16, .packing = SOC_MBUS_PACKING_NONE, .order = SOC_MBUS_ORDER_LE, .layout = SOC_MBUS_LAYOUT_PACKED, }, { .fourcc = V4L2_PIX_FMT_RGB565, .name = "RGB565", .bits_per_sample = 16, .packing = SOC_MBUS_PACKING_NONE, .order = SOC_MBUS_ORDER_LE, .layout = SOC_MBUS_LAYOUT_PACKED, }, { .fourcc = V4L2_PIX_FMT_RGB555X, .name = "ARGB1555", .bits_per_sample = 16, .packing = SOC_MBUS_PACKING_NONE, .order = SOC_MBUS_ORDER_LE, .layout = SOC_MBUS_LAYOUT_PACKED, }, { .fourcc = V4L2_PIX_FMT_RGB32, .name = "RGB888", .bits_per_sample = 32, .packing = SOC_MBUS_PACKING_NONE, .order = SOC_MBUS_ORDER_LE, .layout = SOC_MBUS_LAYOUT_PACKED, }, }; static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx, struct soc_camera_format_xlate *xlate) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct device *dev = icd->parent; int ret, k, n; int formats = 0; struct rcar_vin_cam *cam; enum v4l2_mbus_pixelcode code; const struct soc_mbus_pixelfmt *fmt; ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code); if (ret < 0) return 0; fmt = soc_mbus_get_fmtdesc(code); if (!fmt) { dev_warn(dev, "unsupported format code #%u: %d\n", idx, code); return 0; } ret = rcar_vin_try_bus_param(icd, fmt->bits_per_sample); if (ret < 0) return 0; if (!icd->host_priv) { struct v4l2_mbus_framefmt mf; struct v4l2_rect rect; struct device *dev = icd->parent; int shift; ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); if (ret < 0) return ret; /* Cache current client geometry */ ret = soc_camera_client_g_rect(sd, &rect); if (ret == -ENOIOCTLCMD) { /* Sensor driver doesn't support cropping */ rect.left = 0; rect.top = 0; rect.width = mf.width; rect.height = mf.height; } else if (ret < 0) { return ret; } /* * If sensor proposes too large format then try smaller ones: * 1280x960, 640x480, 320x240 */ for (shift = 0; shift < 3; shift++) { if (mf.width <= VIN_MAX_WIDTH && mf.height <= VIN_MAX_HEIGHT) break; mf.width = 1280 >> shift; mf.height = 960 >> shift; ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd), video, s_mbus_fmt, &mf); if (ret < 0) return ret; } if (shift == 3) { dev_err(dev, "Failed to configure the client below %ux%x\n", mf.width, mf.height); return -EIO; } dev_dbg(dev, "camera fmt %ux%u\n", mf.width, mf.height); cam = kzalloc(sizeof(*cam), GFP_KERNEL); if (!cam) return -ENOMEM; /* * We are called with current camera crop, * initialise subrect with it */ cam->rect = rect; cam->subrect = rect; cam->width = mf.width; cam->height = mf.height; icd->host_priv = cam; } else { cam = icd->host_priv; } /* Beginning of a pass */ if (!idx) cam->extra_fmt = NULL; switch (code) { case V4L2_MBUS_FMT_YUYV8_1X16: case V4L2_MBUS_FMT_YUYV8_2X8: if (cam->extra_fmt) break; /* Add all our formats that can be generated by VIN */ cam->extra_fmt = rcar_vin_formats; n = ARRAY_SIZE(rcar_vin_formats); formats += n; for (k = 0; xlate && k < n; k++, xlate++) { xlate->host_fmt = &rcar_vin_formats[k]; xlate->code = code; dev_dbg(dev, "Providing format %s using code %d\n", rcar_vin_formats[k].name, code); } break; default: if (!rcar_vin_packing_supported(fmt)) return 0; dev_dbg(dev, "Providing format %s in pass-through mode\n", fmt->name); break; } /* Generic pass-through */ formats++; if (xlate) { xlate->host_fmt = fmt; xlate->code = code; xlate++; } return formats; } static void rcar_vin_put_formats(struct soc_camera_device *icd) { kfree(icd->host_priv); icd->host_priv = NULL; } static int rcar_vin_set_crop(struct soc_camera_device *icd, const struct v4l2_crop *a) { struct v4l2_crop a_writable = *a; const struct v4l2_rect *rect = &a_writable.c; struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; struct v4l2_crop cam_crop; struct rcar_vin_cam *cam = icd->host_priv; struct v4l2_rect *cam_rect = &cam_crop.c; struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct device *dev = icd->parent; struct v4l2_mbus_framefmt mf; u32 vnmc; int ret, i; dev_dbg(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height, rect->left, rect->top); /* During camera cropping its output window can change too, stop VIN */ capture_stop_preserve(priv, &vnmc); dev_dbg(dev, "VNMC_REG 0x%x\n", vnmc); /* Apply iterative camera S_CROP for new input window. */ ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop, &cam->rect, &cam->subrect); if (ret < 0) return ret; dev_dbg(dev, "camera cropped to %ux%u@%u:%u\n", cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top); /* On success cam_crop contains current camera crop */ /* Retrieve camera output window */ ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); if (ret < 0) return ret; if (mf.width > VIN_MAX_WIDTH || mf.height > VIN_MAX_HEIGHT) return -EINVAL; /* Cache camera output window */ cam->width = mf.width; cam->height = mf.height; icd->user_width = cam->width; icd->user_height = cam->height; cam->vin_left = rect->left & ~1; cam->vin_top = rect->top & ~1; /* Use VIN cropping to crop to the new window. */ ret = rcar_vin_set_rect(icd); if (ret < 0) return ret; cam->subrect = *rect; dev_dbg(dev, "VIN cropped to %ux%u@%u:%u\n", icd->user_width, icd->user_height, cam->vin_left, cam->vin_top); /* Restore capture */ for (i = 0; i < MAX_BUFFER_NUM; i++) { if (priv->queue_buf[i] && priv->state == STOPPED) { vnmc |= VNMC_ME; break; } } capture_restore(priv, vnmc); /* Even if only camera cropping succeeded */ return ret; } static int rcar_vin_get_crop(struct soc_camera_device *icd, struct v4l2_crop *a) { struct rcar_vin_cam *cam = icd->host_priv; a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; a->c = cam->subrect; return 0; } /* Similar to set_crop multistage iterative algorithm */ static int rcar_vin_set_fmt(struct soc_camera_device *icd, struct v4l2_format *f) { struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct rcar_vin_cam *cam = icd->host_priv; struct v4l2_pix_format *pix = &f->fmt.pix; struct v4l2_mbus_framefmt mf; struct device *dev = icd->parent; __u32 pixfmt = pix->pixelformat; const struct soc_camera_format_xlate *xlate; unsigned int vin_sub_width = 0, vin_sub_height = 0; int ret; bool can_scale; enum v4l2_field field; v4l2_std_id std; dev_dbg(dev, "S_FMT(pix=0x%x, %ux%u)\n", pixfmt, pix->width, pix->height); switch (pix->field) { default: pix->field = V4L2_FIELD_NONE; /* fall-through */ case V4L2_FIELD_NONE: case V4L2_FIELD_TOP: case V4L2_FIELD_BOTTOM: case V4L2_FIELD_INTERLACED_TB: case V4L2_FIELD_INTERLACED_BT: field = pix->field; break; case V4L2_FIELD_INTERLACED: /* Query for standard if not explicitly mentioned _TB/_BT */ ret = v4l2_subdev_call(sd, video, querystd, &std); if (ret < 0) std = V4L2_STD_625_50; field = std & V4L2_STD_625_50 ? V4L2_FIELD_INTERLACED_TB : V4L2_FIELD_INTERLACED_BT; break; } xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); if (!xlate) { dev_warn(dev, "Format %x not found\n", pixfmt); return -EINVAL; } /* Calculate client output geometry */ soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf, 12); mf.field = pix->field; mf.colorspace = pix->colorspace; mf.code = xlate->code; switch (pixfmt) { case V4L2_PIX_FMT_RGB32: can_scale = priv->chip != RCAR_E1; break; case V4L2_PIX_FMT_UYVY: case V4L2_PIX_FMT_YUYV: case V4L2_PIX_FMT_RGB565: case V4L2_PIX_FMT_RGB555X: can_scale = true; break; default: can_scale = false; break; } dev_dbg(dev, "request camera output %ux%u\n", mf.width, mf.height); ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect, &mf, &vin_sub_width, &vin_sub_height, can_scale, 12); /* Done with the camera. Now see if we can improve the result */ dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n", ret, mf.width, mf.height, pix->width, pix->height); if (ret == -ENOIOCTLCMD) dev_dbg(dev, "Sensor doesn't support scaling\n"); else if (ret < 0) return ret; if (mf.code != xlate->code) return -EINVAL; /* Prepare VIN crop */ cam->width = mf.width; cam->height = mf.height; /* Use VIN scaling to scale to the requested user window. */ /* We cannot scale up */ if (pix->width > vin_sub_width) vin_sub_width = pix->width; if (pix->height > vin_sub_height) vin_sub_height = pix->height; pix->colorspace = mf.colorspace; if (!can_scale) { pix->width = vin_sub_width; pix->height = vin_sub_height; } /* * We have calculated CFLCR, the actual configuration will be performed * in rcar_vin_set_bus_param() */ dev_dbg(dev, "W: %u : %u, H: %u : %u\n", vin_sub_width, pix->width, vin_sub_height, pix->height); icd->current_fmt = xlate; priv->field = field; return 0; } static int rcar_vin_try_fmt(struct soc_camera_device *icd, struct v4l2_format *f) { const struct soc_camera_format_xlate *xlate; struct v4l2_pix_format *pix = &f->fmt.pix; struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct v4l2_mbus_framefmt mf; __u32 pixfmt = pix->pixelformat; int width, height; int ret; xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); if (!xlate) { xlate = icd->current_fmt; dev_dbg(icd->parent, "Format %x not found, keeping %x\n", pixfmt, xlate->host_fmt->fourcc); pixfmt = xlate->host_fmt->fourcc; pix->pixelformat = pixfmt; pix->colorspace = icd->colorspace; } /* FIXME: calculate using depth and bus width */ v4l_bound_align_image(&pix->width, 2, VIN_MAX_WIDTH, 1, &pix->height, 4, VIN_MAX_HEIGHT, 2, 0); width = pix->width; height = pix->height; /* let soc-camera calculate these values */ pix->bytesperline = 0; pix->sizeimage = 0; /* limit to sensor capabilities */ mf.width = pix->width; mf.height = pix->height; mf.field = pix->field; mf.code = xlate->code; mf.colorspace = pix->colorspace; ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd), video, try_mbus_fmt, &mf); if (ret < 0) return ret; pix->width = mf.width; pix->height = mf.height; pix->field = mf.field; pix->colorspace = mf.colorspace; if (pixfmt == V4L2_PIX_FMT_NV16) { /* FIXME: check against rect_max after converting soc-camera */ /* We can scale precisely, need a bigger image from camera */ if (pix->width < width || pix->height < height) { /* * We presume, the sensor behaves sanely, i.e. if * requested a bigger rectangle, it will not return a * smaller one. */ mf.width = VIN_MAX_WIDTH; mf.height = VIN_MAX_HEIGHT; ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd), video, try_mbus_fmt, &mf); if (ret < 0) { dev_err(icd->parent, "client try_fmt() = %d\n", ret); return ret; } } /* We will scale exactly */ if (mf.width > width) pix->width = width; if (mf.height > height) pix->height = height; } return ret; } static unsigned int rcar_vin_poll(struct file *file, poll_table *pt) { struct soc_camera_device *icd = file->private_data; return vb2_poll(&icd->vb2_vidq, file, pt); } static int rcar_vin_querycap(struct soc_camera_host *ici, struct v4l2_capability *cap) { strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card)); cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; return 0; } static int rcar_vin_init_videobuf2(struct vb2_queue *vq, struct soc_camera_device *icd) { vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; vq->io_modes = VB2_MMAP | VB2_USERPTR; vq->drv_priv = icd; vq->ops = &rcar_vin_vb2_ops; vq->mem_ops = &vb2_dma_contig_memops; vq->buf_struct_size = sizeof(struct rcar_vin_buffer); vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; return vb2_queue_init(vq); } static struct soc_camera_host_ops rcar_vin_host_ops = { .owner = THIS_MODULE, .add = rcar_vin_add_device, .remove = rcar_vin_remove_device, .clock_start = rcar_vin_clock_start, .clock_stop = rcar_vin_clock_stop, .get_formats = rcar_vin_get_formats, .put_formats = rcar_vin_put_formats, .get_crop = rcar_vin_get_crop, .set_crop = rcar_vin_set_crop, .try_fmt = rcar_vin_try_fmt, .set_fmt = rcar_vin_set_fmt, .poll = rcar_vin_poll, .querycap = rcar_vin_querycap, .set_bus_param = rcar_vin_set_bus_param, .init_videobuf2 = rcar_vin_init_videobuf2, }; static struct platform_device_id rcar_vin_id_table[] = { { "r8a7790-vin", RCAR_H2 }, { "r8a7779-vin", RCAR_H1 }, { "r8a7778-vin", RCAR_M1 }, { "uPD35004-vin", RCAR_E1 }, {}, }; MODULE_DEVICE_TABLE(platform, rcar_vin_id_table); static int rcar_vin_probe(struct platform_device *pdev) { struct rcar_vin_priv *priv; struct resource *mem; struct rcar_vin_platform_data *pdata; int irq, ret; pdata = pdev->dev.platform_data; if (!pdata || !pdata->flags) { dev_err(&pdev->dev, "platform data not set\n"); return -EINVAL; } mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (mem == NULL) return -EINVAL; irq = platform_get_irq(pdev, 0); if (irq <= 0) return -EINVAL; priv = devm_kzalloc(&pdev->dev, sizeof(struct rcar_vin_priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->base = devm_ioremap_resource(&pdev->dev, mem); if (IS_ERR(priv->base)) return PTR_ERR(priv->base); ret = devm_request_irq(&pdev->dev, irq, rcar_vin_irq, IRQF_SHARED, dev_name(&pdev->dev), priv); if (ret) return ret; priv->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); if (IS_ERR(priv->alloc_ctx)) return PTR_ERR(priv->alloc_ctx); priv->ici.priv = priv; priv->ici.v4l2_dev.dev = &pdev->dev; priv->ici.nr = pdev->id; priv->ici.drv_name = dev_name(&pdev->dev); priv->ici.ops = &rcar_vin_host_ops; priv->pdata = pdata; priv->chip = pdev->id_entry->driver_data; spin_lock_init(&priv->lock); INIT_LIST_HEAD(&priv->capture); priv->state = STOPPED; pm_suspend_ignore_children(&pdev->dev, true); pm_runtime_enable(&pdev->dev); ret = soc_camera_host_register(&priv->ici); if (ret) goto cleanup; return 0; cleanup: pm_runtime_disable(&pdev->dev); vb2_dma_contig_cleanup_ctx(priv->alloc_ctx); return ret; } static int rcar_vin_remove(struct platform_device *pdev) { struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); struct rcar_vin_priv *priv = container_of(soc_host, struct rcar_vin_priv, ici); soc_camera_host_unregister(soc_host); pm_runtime_disable(&pdev->dev); vb2_dma_contig_cleanup_ctx(priv->alloc_ctx); return 0; } static struct platform_driver rcar_vin_driver = { .probe = rcar_vin_probe, .remove = rcar_vin_remove, .driver = { .name = DRV_NAME, .owner = THIS_MODULE, }, .id_table = rcar_vin_id_table, }; module_platform_driver(rcar_vin_driver); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:rcar_vin"); MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");