| /* |
| * SuperH Video Output Unit (VOU) driver |
| * |
| * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/dma-mapping.h> |
| #include <linux/delay.h> |
| #include <linux/errno.h> |
| #include <linux/fs.h> |
| #include <linux/i2c.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/slab.h> |
| #include <linux/videodev2.h> |
| #include <linux/module.h> |
| |
| #include <media/sh_vou.h> |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-mediabus.h> |
| #include <media/videobuf-dma-contig.h> |
| |
| /* Mirror addresses are not available for all registers */ |
| #define VOUER 0 |
| #define VOUCR 4 |
| #define VOUSTR 8 |
| #define VOUVCR 0xc |
| #define VOUISR 0x10 |
| #define VOUBCR 0x14 |
| #define VOUDPR 0x18 |
| #define VOUDSR 0x1c |
| #define VOUVPR 0x20 |
| #define VOUIR 0x24 |
| #define VOUSRR 0x28 |
| #define VOUMSR 0x2c |
| #define VOUHIR 0x30 |
| #define VOUDFR 0x34 |
| #define VOUAD1R 0x38 |
| #define VOUAD2R 0x3c |
| #define VOUAIR 0x40 |
| #define VOUSWR 0x44 |
| #define VOURCR 0x48 |
| #define VOURPR 0x50 |
| |
| enum sh_vou_status { |
| SH_VOU_IDLE, |
| SH_VOU_INITIALISING, |
| SH_VOU_RUNNING, |
| }; |
| |
| #define VOU_MAX_IMAGE_WIDTH 720 |
| #define VOU_MAX_IMAGE_HEIGHT 576 |
| |
| struct sh_vou_device { |
| struct v4l2_device v4l2_dev; |
| struct video_device vdev; |
| atomic_t use_count; |
| struct sh_vou_pdata *pdata; |
| spinlock_t lock; |
| void __iomem *base; |
| /* State information */ |
| struct v4l2_pix_format pix; |
| struct v4l2_rect rect; |
| struct list_head queue; |
| v4l2_std_id std; |
| int pix_idx; |
| struct videobuf_buffer *active; |
| enum sh_vou_status status; |
| struct mutex fop_lock; |
| }; |
| |
| struct sh_vou_file { |
| struct videobuf_queue vbq; |
| }; |
| |
| /* Register access routines for sides A, B and mirror addresses */ |
| static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg, |
| u32 value) |
| { |
| __raw_writel(value, vou_dev->base + reg); |
| } |
| |
| static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg, |
| u32 value) |
| { |
| __raw_writel(value, vou_dev->base + reg); |
| __raw_writel(value, vou_dev->base + reg + 0x1000); |
| } |
| |
| static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg, |
| u32 value) |
| { |
| __raw_writel(value, vou_dev->base + reg + 0x2000); |
| } |
| |
| static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg) |
| { |
| return __raw_readl(vou_dev->base + reg); |
| } |
| |
| static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg, |
| u32 value, u32 mask) |
| { |
| u32 old = __raw_readl(vou_dev->base + reg); |
| |
| value = (value & mask) | (old & ~mask); |
| __raw_writel(value, vou_dev->base + reg); |
| } |
| |
| static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg, |
| u32 value, u32 mask) |
| { |
| sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask); |
| } |
| |
| static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg, |
| u32 value, u32 mask) |
| { |
| sh_vou_reg_a_set(vou_dev, reg, value, mask); |
| sh_vou_reg_b_set(vou_dev, reg, value, mask); |
| } |
| |
| struct sh_vou_fmt { |
| u32 pfmt; |
| char *desc; |
| unsigned char bpp; |
| unsigned char rgb; |
| unsigned char yf; |
| unsigned char pkf; |
| }; |
| |
| /* Further pixel formats can be added */ |
| static struct sh_vou_fmt vou_fmt[] = { |
| { |
| .pfmt = V4L2_PIX_FMT_NV12, |
| .bpp = 12, |
| .desc = "YVU420 planar", |
| .yf = 0, |
| .rgb = 0, |
| }, |
| { |
| .pfmt = V4L2_PIX_FMT_NV16, |
| .bpp = 16, |
| .desc = "YVYU planar", |
| .yf = 1, |
| .rgb = 0, |
| }, |
| { |
| .pfmt = V4L2_PIX_FMT_RGB24, |
| .bpp = 24, |
| .desc = "RGB24", |
| .pkf = 2, |
| .rgb = 1, |
| }, |
| { |
| .pfmt = V4L2_PIX_FMT_RGB565, |
| .bpp = 16, |
| .desc = "RGB565", |
| .pkf = 3, |
| .rgb = 1, |
| }, |
| { |
| .pfmt = V4L2_PIX_FMT_RGB565X, |
| .bpp = 16, |
| .desc = "RGB565 byteswapped", |
| .pkf = 3, |
| .rgb = 1, |
| }, |
| }; |
| |
| static void sh_vou_schedule_next(struct sh_vou_device *vou_dev, |
| struct videobuf_buffer *vb) |
| { |
| dma_addr_t addr1, addr2; |
| |
| addr1 = videobuf_to_dma_contig(vb); |
| switch (vou_dev->pix.pixelformat) { |
| case V4L2_PIX_FMT_NV12: |
| case V4L2_PIX_FMT_NV16: |
| addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height; |
| break; |
| default: |
| addr2 = 0; |
| } |
| |
| sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1); |
| sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2); |
| } |
| |
| static void sh_vou_stream_start(struct sh_vou_device *vou_dev, |
| struct videobuf_buffer *vb) |
| { |
| unsigned int row_coeff; |
| #ifdef __LITTLE_ENDIAN |
| u32 dataswap = 7; |
| #else |
| u32 dataswap = 0; |
| #endif |
| |
| switch (vou_dev->pix.pixelformat) { |
| default: |
| case V4L2_PIX_FMT_NV12: |
| case V4L2_PIX_FMT_NV16: |
| row_coeff = 1; |
| break; |
| case V4L2_PIX_FMT_RGB565: |
| dataswap ^= 1; |
| case V4L2_PIX_FMT_RGB565X: |
| row_coeff = 2; |
| break; |
| case V4L2_PIX_FMT_RGB24: |
| row_coeff = 3; |
| break; |
| } |
| |
| sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap); |
| sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff); |
| sh_vou_schedule_next(vou_dev, vb); |
| } |
| |
| static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb) |
| { |
| BUG_ON(in_interrupt()); |
| |
| /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */ |
| videobuf_waiton(vq, vb, 0, 0); |
| videobuf_dma_contig_free(vq, vb); |
| vb->state = VIDEOBUF_NEEDS_INIT; |
| } |
| |
| /* Locking: caller holds fop_lock mutex */ |
| static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count, |
| unsigned int *size) |
| { |
| struct video_device *vdev = vq->priv_data; |
| struct sh_vou_device *vou_dev = video_get_drvdata(vdev); |
| |
| *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width * |
| vou_dev->pix.height / 8; |
| |
| if (*count < 2) |
| *count = 2; |
| |
| /* Taking into account maximum frame size, *count will stay >= 2 */ |
| if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024) |
| *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size); |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s(): count=%d, size=%d\n", __func__, |
| *count, *size); |
| |
| return 0; |
| } |
| |
| /* Locking: caller holds fop_lock mutex */ |
| static int sh_vou_buf_prepare(struct videobuf_queue *vq, |
| struct videobuf_buffer *vb, |
| enum v4l2_field field) |
| { |
| struct video_device *vdev = vq->priv_data; |
| struct sh_vou_device *vou_dev = video_get_drvdata(vdev); |
| struct v4l2_pix_format *pix = &vou_dev->pix; |
| int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8; |
| int ret; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| if (vb->width != pix->width || |
| vb->height != pix->height || |
| vb->field != pix->field) { |
| vb->width = pix->width; |
| vb->height = pix->height; |
| vb->field = field; |
| if (vb->state != VIDEOBUF_NEEDS_INIT) |
| free_buffer(vq, vb); |
| } |
| |
| vb->size = vb->height * bytes_per_line; |
| if (vb->baddr && vb->bsize < vb->size) { |
| /* User buffer too small */ |
| dev_warn(vq->dev, "User buffer too small: [%zu] @ %lx\n", |
| vb->bsize, vb->baddr); |
| return -EINVAL; |
| } |
| |
| if (vb->state == VIDEOBUF_NEEDS_INIT) { |
| ret = videobuf_iolock(vq, vb, NULL); |
| if (ret < 0) { |
| dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n", |
| vb->memory, ret); |
| return ret; |
| } |
| vb->state = VIDEOBUF_PREPARED; |
| } |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, |
| "%s(): fmt #%d, %u bytes per line, phys %pad, type %d, state %d\n", |
| __func__, vou_dev->pix_idx, bytes_per_line, |
| ({ dma_addr_t addr = videobuf_to_dma_contig(vb); &addr; }), |
| vb->memory, vb->state); |
| |
| return 0; |
| } |
| |
| /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */ |
| static void sh_vou_buf_queue(struct videobuf_queue *vq, |
| struct videobuf_buffer *vb) |
| { |
| struct video_device *vdev = vq->priv_data; |
| struct sh_vou_device *vou_dev = video_get_drvdata(vdev); |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| vb->state = VIDEOBUF_QUEUED; |
| list_add_tail(&vb->queue, &vou_dev->queue); |
| |
| if (vou_dev->status == SH_VOU_RUNNING) { |
| return; |
| } else if (!vou_dev->active) { |
| vou_dev->active = vb; |
| /* Start from side A: we use mirror addresses, so, set B */ |
| sh_vou_reg_a_write(vou_dev, VOURPR, 1); |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n", |
| __func__, sh_vou_reg_a_read(vou_dev, VOUSTR)); |
| sh_vou_schedule_next(vou_dev, vb); |
| /* Only activate VOU after the second buffer */ |
| } else if (vou_dev->active->queue.next == &vb->queue) { |
| /* Second buffer - initialise register side B */ |
| sh_vou_reg_a_write(vou_dev, VOURPR, 0); |
| sh_vou_stream_start(vou_dev, vb); |
| |
| /* Register side switching with frame VSYNC */ |
| sh_vou_reg_a_write(vou_dev, VOURCR, 5); |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s: second buffer status 0x%x\n", |
| __func__, sh_vou_reg_a_read(vou_dev, VOUSTR)); |
| |
| /* Enable End-of-Frame (VSYNC) interrupts */ |
| sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004); |
| /* Two buffers on the queue - activate the hardware */ |
| |
| vou_dev->status = SH_VOU_RUNNING; |
| sh_vou_reg_a_write(vou_dev, VOUER, 0x107); |
| } |
| } |
| |
| static void sh_vou_buf_release(struct videobuf_queue *vq, |
| struct videobuf_buffer *vb) |
| { |
| struct video_device *vdev = vq->priv_data; |
| struct sh_vou_device *vou_dev = video_get_drvdata(vdev); |
| unsigned long flags; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| spin_lock_irqsave(&vou_dev->lock, flags); |
| |
| if (vou_dev->active == vb) { |
| /* disable output */ |
| sh_vou_reg_a_set(vou_dev, VOUER, 0, 1); |
| /* ...but the current frame will complete */ |
| sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000); |
| vou_dev->active = NULL; |
| } |
| |
| if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) { |
| vb->state = VIDEOBUF_ERROR; |
| list_del(&vb->queue); |
| } |
| |
| spin_unlock_irqrestore(&vou_dev->lock, flags); |
| |
| free_buffer(vq, vb); |
| } |
| |
| static struct videobuf_queue_ops sh_vou_video_qops = { |
| .buf_setup = sh_vou_buf_setup, |
| .buf_prepare = sh_vou_buf_prepare, |
| .buf_queue = sh_vou_buf_queue, |
| .buf_release = sh_vou_buf_release, |
| }; |
| |
| /* Video IOCTLs */ |
| static int sh_vou_querycap(struct file *file, void *priv, |
| struct v4l2_capability *cap) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| strlcpy(cap->card, "SuperH VOU", sizeof(cap->card)); |
| cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; |
| cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
| return 0; |
| } |
| |
| /* Enumerate formats, that the device can accept from the user */ |
| static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv, |
| struct v4l2_fmtdesc *fmt) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| |
| if (fmt->index >= ARRAY_SIZE(vou_fmt)) |
| return -EINVAL; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
| strlcpy(fmt->description, vou_fmt[fmt->index].desc, |
| sizeof(fmt->description)); |
| fmt->pixelformat = vou_fmt[fmt->index].pfmt; |
| |
| return 0; |
| } |
| |
| static int sh_vou_g_fmt_vid_out(struct file *file, void *priv, |
| struct v4l2_format *fmt) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
| fmt->fmt.pix = vou_dev->pix; |
| |
| return 0; |
| } |
| |
| static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4}; |
| static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1}; |
| static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3}; |
| static const unsigned char vou_scale_v_num[] = {1, 2, 4}; |
| static const unsigned char vou_scale_v_den[] = {1, 1, 1}; |
| static const unsigned char vou_scale_v_fld[] = {0, 1}; |
| |
| static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev, |
| int pix_idx, int w_idx, int h_idx) |
| { |
| struct sh_vou_fmt *fmt = vou_fmt + pix_idx; |
| unsigned int black_left, black_top, width_max, |
| frame_in_height, frame_out_height, frame_out_top; |
| struct v4l2_rect *rect = &vou_dev->rect; |
| struct v4l2_pix_format *pix = &vou_dev->pix; |
| u32 vouvcr = 0, dsr_h, dsr_v; |
| |
| if (vou_dev->std & V4L2_STD_525_60) { |
| width_max = 858; |
| /* height_max = 262; */ |
| } else { |
| width_max = 864; |
| /* height_max = 312; */ |
| } |
| |
| frame_in_height = pix->height / 2; |
| frame_out_height = rect->height / 2; |
| frame_out_top = rect->top / 2; |
| |
| /* |
| * Cropping scheme: max useful image is 720x480, and the total video |
| * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts |
| * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock, |
| * of which the first 33 / 25 clocks HSYNC must be held active. This |
| * has to be configured in CR[HW]. 1 pixel equals 2 clock periods. |
| * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives |
| * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area, |
| * beyond DSR, specified on the left and top by the VPR register "black |
| * pixels" and out-of-image area (DPR) "background pixels." We fix VPR |
| * at 138 / 144 : 20, because that's the HSYNC timing, that our first |
| * client requires, and that's exactly what leaves us 720 pixels for the |
| * image; we leave VPR[VVP] at default 20 for now, because the client |
| * doesn't seem to have any special requirements for it. Otherwise we |
| * could also set it to max - 240 = 22 / 72. Thus VPR depends only on |
| * the selected standard, and DPR and DSR are selected according to |
| * cropping. Q: how does the client detect the first valid line? Does |
| * HSYNC stay inactive during invalid (black) lines? |
| */ |
| black_left = width_max - VOU_MAX_IMAGE_WIDTH; |
| black_top = 20; |
| |
| dsr_h = rect->width + rect->left; |
| dsr_v = frame_out_height + frame_out_top; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, |
| "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n", |
| pix->width, frame_in_height, black_left, black_top, |
| rect->left, frame_out_top, dsr_h, dsr_v); |
| |
| /* VOUISR height - half of a frame height in frame mode */ |
| sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height); |
| sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top); |
| sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top); |
| sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v); |
| |
| /* |
| * if necessary, we could set VOUHIR to |
| * max(black_left + dsr_h, width_max) here |
| */ |
| |
| if (w_idx) |
| vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4); |
| if (h_idx) |
| vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1]; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr); |
| |
| /* To produce a colour bar for testing set bit 23 of VOUVCR */ |
| sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr); |
| sh_vou_reg_ab_write(vou_dev, VOUDFR, |
| fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16)); |
| } |
| |
| struct sh_vou_geometry { |
| struct v4l2_rect output; |
| unsigned int in_width; |
| unsigned int in_height; |
| int scale_idx_h; |
| int scale_idx_v; |
| }; |
| |
| /* |
| * Find input geometry, that we can use to produce output, closest to the |
| * requested rectangle, using VOU scaling |
| */ |
| static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std) |
| { |
| /* The compiler cannot know, that best and idx will indeed be set */ |
| unsigned int best_err = UINT_MAX, best = 0, img_height_max; |
| int i, idx = 0; |
| |
| if (std & V4L2_STD_525_60) |
| img_height_max = 480; |
| else |
| img_height_max = 576; |
| |
| /* Image width must be a multiple of 4 */ |
| v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2, |
| &geo->in_height, 0, img_height_max, 1, 0); |
| |
| /* Select scales to come as close as possible to the output image */ |
| for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) { |
| unsigned int err; |
| unsigned int found = geo->output.width * vou_scale_h_den[i] / |
| vou_scale_h_num[i]; |
| |
| if (found > VOU_MAX_IMAGE_WIDTH) |
| /* scales increase */ |
| break; |
| |
| err = abs(found - geo->in_width); |
| if (err < best_err) { |
| best_err = err; |
| idx = i; |
| best = found; |
| } |
| if (!err) |
| break; |
| } |
| |
| geo->in_width = best; |
| geo->scale_idx_h = idx; |
| |
| best_err = UINT_MAX; |
| |
| /* This loop can be replaced with one division */ |
| for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) { |
| unsigned int err; |
| unsigned int found = geo->output.height * vou_scale_v_den[i] / |
| vou_scale_v_num[i]; |
| |
| if (found > img_height_max) |
| /* scales increase */ |
| break; |
| |
| err = abs(found - geo->in_height); |
| if (err < best_err) { |
| best_err = err; |
| idx = i; |
| best = found; |
| } |
| if (!err) |
| break; |
| } |
| |
| geo->in_height = best; |
| geo->scale_idx_v = idx; |
| } |
| |
| /* |
| * Find output geometry, that we can produce, using VOU scaling, closest to |
| * the requested rectangle |
| */ |
| static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std) |
| { |
| unsigned int best_err = UINT_MAX, best = geo->in_width, |
| width_max, height_max, img_height_max; |
| int i, idx_h = 0, idx_v = 0; |
| |
| if (std & V4L2_STD_525_60) { |
| width_max = 858; |
| height_max = 262 * 2; |
| img_height_max = 480; |
| } else { |
| width_max = 864; |
| height_max = 312 * 2; |
| img_height_max = 576; |
| } |
| |
| /* Select scales to come as close as possible to the output image */ |
| for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) { |
| unsigned int err; |
| unsigned int found = geo->in_width * vou_scale_h_num[i] / |
| vou_scale_h_den[i]; |
| |
| if (found > VOU_MAX_IMAGE_WIDTH) |
| /* scales increase */ |
| break; |
| |
| err = abs(found - geo->output.width); |
| if (err < best_err) { |
| best_err = err; |
| idx_h = i; |
| best = found; |
| } |
| if (!err) |
| break; |
| } |
| |
| geo->output.width = best; |
| geo->scale_idx_h = idx_h; |
| if (geo->output.left + best > width_max) |
| geo->output.left = width_max - best; |
| |
| pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width, |
| vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best); |
| |
| best_err = UINT_MAX; |
| |
| /* This loop can be replaced with one division */ |
| for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) { |
| unsigned int err; |
| unsigned int found = geo->in_height * vou_scale_v_num[i] / |
| vou_scale_v_den[i]; |
| |
| if (found > img_height_max) |
| /* scales increase */ |
| break; |
| |
| err = abs(found - geo->output.height); |
| if (err < best_err) { |
| best_err = err; |
| idx_v = i; |
| best = found; |
| } |
| if (!err) |
| break; |
| } |
| |
| geo->output.height = best; |
| geo->scale_idx_v = idx_v; |
| if (geo->output.top + best > height_max) |
| geo->output.top = height_max - best; |
| |
| pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height, |
| vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best); |
| } |
| |
| static int sh_vou_s_fmt_vid_out(struct file *file, void *priv, |
| struct v4l2_format *fmt) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| unsigned int img_height_max; |
| int pix_idx; |
| struct sh_vou_geometry geo; |
| struct v4l2_subdev_format format = { |
| .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| /* Revisit: is this the correct code? */ |
| .format.code = MEDIA_BUS_FMT_YUYV8_2X8, |
| .format.field = V4L2_FIELD_INTERLACED, |
| .format.colorspace = V4L2_COLORSPACE_SMPTE170M, |
| }; |
| struct v4l2_mbus_framefmt *mbfmt = &format.format; |
| int ret; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__, |
| vou_dev->rect.width, vou_dev->rect.height, |
| pix->width, pix->height); |
| |
| if (pix->field == V4L2_FIELD_ANY) |
| pix->field = V4L2_FIELD_NONE; |
| |
| if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || |
| pix->field != V4L2_FIELD_NONE) |
| return -EINVAL; |
| |
| for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++) |
| if (vou_fmt[pix_idx].pfmt == pix->pixelformat) |
| break; |
| |
| if (pix_idx == ARRAY_SIZE(vou_fmt)) |
| return -EINVAL; |
| |
| if (vou_dev->std & V4L2_STD_525_60) |
| img_height_max = 480; |
| else |
| img_height_max = 576; |
| |
| /* Image width must be a multiple of 4 */ |
| v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2, |
| &pix->height, 0, img_height_max, 1, 0); |
| |
| geo.in_width = pix->width; |
| geo.in_height = pix->height; |
| geo.output = vou_dev->rect; |
| |
| vou_adjust_output(&geo, vou_dev->std); |
| |
| mbfmt->width = geo.output.width; |
| mbfmt->height = geo.output.height; |
| ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad, |
| set_fmt, NULL, &format); |
| /* Must be implemented, so, don't check for -ENOIOCTLCMD */ |
| if (ret < 0) |
| return ret; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__, |
| geo.output.width, geo.output.height, mbfmt->width, mbfmt->height); |
| |
| /* Sanity checks */ |
| if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH || |
| (unsigned)mbfmt->height > img_height_max || |
| mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8) |
| return -EIO; |
| |
| if (mbfmt->width != geo.output.width || |
| mbfmt->height != geo.output.height) { |
| geo.output.width = mbfmt->width; |
| geo.output.height = mbfmt->height; |
| |
| vou_adjust_input(&geo, vou_dev->std); |
| } |
| |
| /* We tried to preserve output rectangle, but it could have changed */ |
| vou_dev->rect = geo.output; |
| pix->width = geo.in_width; |
| pix->height = geo.in_height; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__, |
| pix->width, pix->height); |
| |
| vou_dev->pix_idx = pix_idx; |
| |
| vou_dev->pix = *pix; |
| |
| sh_vou_configure_geometry(vou_dev, pix_idx, |
| geo.scale_idx_h, geo.scale_idx_v); |
| |
| return 0; |
| } |
| |
| static int sh_vou_try_fmt_vid_out(struct file *file, void *priv, |
| struct v4l2_format *fmt) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| int i; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
| pix->field = V4L2_FIELD_NONE; |
| |
| v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1, |
| &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0); |
| |
| for (i = 0; i < ARRAY_SIZE(vou_fmt); i++) |
| if (vou_fmt[i].pfmt == pix->pixelformat) |
| return 0; |
| |
| pix->pixelformat = vou_fmt[0].pfmt; |
| |
| return 0; |
| } |
| |
| static int sh_vou_reqbufs(struct file *file, void *priv, |
| struct v4l2_requestbuffers *req) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = priv; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) |
| return -EINVAL; |
| |
| return videobuf_reqbufs(&vou_file->vbq, req); |
| } |
| |
| static int sh_vou_querybuf(struct file *file, void *priv, |
| struct v4l2_buffer *b) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = priv; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| return videobuf_querybuf(&vou_file->vbq, b); |
| } |
| |
| static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = priv; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| return videobuf_qbuf(&vou_file->vbq, b); |
| } |
| |
| static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = priv; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK); |
| } |
| |
| static int sh_vou_streamon(struct file *file, void *priv, |
| enum v4l2_buf_type buftype) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = priv; |
| int ret; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, |
| video, s_stream, 1); |
| if (ret < 0 && ret != -ENOIOCTLCMD) |
| return ret; |
| |
| /* This calls our .buf_queue() (== sh_vou_buf_queue) */ |
| return videobuf_streamon(&vou_file->vbq); |
| } |
| |
| static int sh_vou_streamoff(struct file *file, void *priv, |
| enum v4l2_buf_type buftype) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = priv; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| /* |
| * This calls buf_release from host driver's videobuf_queue_ops for all |
| * remaining buffers. When the last buffer is freed, stop streaming |
| */ |
| videobuf_streamoff(&vou_file->vbq); |
| v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0); |
| |
| return 0; |
| } |
| |
| static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt) |
| { |
| switch (bus_fmt) { |
| default: |
| pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n", |
| __func__, bus_fmt); |
| case SH_VOU_BUS_8BIT: |
| return 1; |
| case SH_VOU_BUS_16BIT: |
| return 0; |
| case SH_VOU_BUS_BT656: |
| return 3; |
| } |
| } |
| |
| static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| int ret; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id); |
| |
| if (std_id & ~vou_dev->vdev.tvnorms) |
| return -EINVAL; |
| |
| ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, |
| s_std_output, std_id); |
| /* Shall we continue, if the subdev doesn't support .s_std_output()? */ |
| if (ret < 0 && ret != -ENOIOCTLCMD) |
| return ret; |
| |
| if (std_id & V4L2_STD_525_60) |
| sh_vou_reg_ab_set(vou_dev, VOUCR, |
| sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29); |
| else |
| sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29); |
| |
| vou_dev->std = std_id; |
| |
| return 0; |
| } |
| |
| static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| *std = vou_dev->std; |
| |
| return 0; |
| } |
| |
| static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
| a->c = vou_dev->rect; |
| |
| return 0; |
| } |
| |
| /* Assume a dull encoder, do all the work ourselves. */ |
| static int sh_vou_s_crop(struct file *file, void *fh, const struct v4l2_crop *a) |
| { |
| struct v4l2_crop a_writable = *a; |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct v4l2_rect *rect = &a_writable.c; |
| struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT}; |
| struct v4l2_pix_format *pix = &vou_dev->pix; |
| struct sh_vou_geometry geo; |
| struct v4l2_subdev_format format = { |
| .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
| /* Revisit: is this the correct code? */ |
| .format.code = MEDIA_BUS_FMT_YUYV8_2X8, |
| .format.field = V4L2_FIELD_INTERLACED, |
| .format.colorspace = V4L2_COLORSPACE_SMPTE170M, |
| }; |
| unsigned int img_height_max; |
| int ret; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__, |
| rect->width, rect->height, rect->left, rect->top); |
| |
| if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) |
| return -EINVAL; |
| |
| if (vou_dev->std & V4L2_STD_525_60) |
| img_height_max = 480; |
| else |
| img_height_max = 576; |
| |
| v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1, |
| &rect->height, 0, img_height_max, 1, 0); |
| |
| if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH) |
| rect->left = VOU_MAX_IMAGE_WIDTH - rect->width; |
| |
| if (rect->height + rect->top > img_height_max) |
| rect->top = img_height_max - rect->height; |
| |
| geo.output = *rect; |
| geo.in_width = pix->width; |
| geo.in_height = pix->height; |
| |
| /* Configure the encoder one-to-one, position at 0, ignore errors */ |
| sd_crop.c.width = geo.output.width; |
| sd_crop.c.height = geo.output.height; |
| /* |
| * We first issue a S_CROP, so that the subsequent S_FMT delivers the |
| * final encoder configuration. |
| */ |
| v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, |
| s_crop, &sd_crop); |
| format.format.width = geo.output.width; |
| format.format.height = geo.output.height; |
| ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad, |
| set_fmt, NULL, &format); |
| /* Must be implemented, so, don't check for -ENOIOCTLCMD */ |
| if (ret < 0) |
| return ret; |
| |
| /* Sanity checks */ |
| if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH || |
| (unsigned)format.format.height > img_height_max || |
| format.format.code != MEDIA_BUS_FMT_YUYV8_2X8) |
| return -EIO; |
| |
| geo.output.width = format.format.width; |
| geo.output.height = format.format.height; |
| |
| /* |
| * No down-scaling. According to the API, current call has precedence: |
| * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two. |
| */ |
| vou_adjust_input(&geo, vou_dev->std); |
| |
| /* We tried to preserve output rectangle, but it could have changed */ |
| vou_dev->rect = geo.output; |
| pix->width = geo.in_width; |
| pix->height = geo.in_height; |
| |
| sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx, |
| geo.scale_idx_h, geo.scale_idx_v); |
| |
| return 0; |
| } |
| |
| /* |
| * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle |
| * is the initial register values, height takes the interlaced format into |
| * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can |
| * actually only meaningfully contain values <= 720 and <= 240 respectively, and |
| * not <= 864 and <= 312. |
| */ |
| static int sh_vou_cropcap(struct file *file, void *priv, |
| struct v4l2_cropcap *a) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
| a->bounds.left = 0; |
| a->bounds.top = 0; |
| a->bounds.width = VOU_MAX_IMAGE_WIDTH; |
| a->bounds.height = VOU_MAX_IMAGE_HEIGHT; |
| /* Default = max, set VOUDPR = 0, which is not hardware default */ |
| a->defrect.left = 0; |
| a->defrect.top = 0; |
| a->defrect.width = VOU_MAX_IMAGE_WIDTH; |
| a->defrect.height = VOU_MAX_IMAGE_HEIGHT; |
| a->pixelaspect.numerator = 1; |
| a->pixelaspect.denominator = 1; |
| |
| return 0; |
| } |
| |
| static irqreturn_t sh_vou_isr(int irq, void *dev_id) |
| { |
| struct sh_vou_device *vou_dev = dev_id; |
| static unsigned long j; |
| struct videobuf_buffer *vb; |
| static int cnt; |
| u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked; |
| u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR); |
| |
| if (!(irq_status & 0x300)) { |
| if (printk_timed_ratelimit(&j, 500)) |
| dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n", |
| irq_status); |
| return IRQ_NONE; |
| } |
| |
| spin_lock(&vou_dev->lock); |
| if (!vou_dev->active || list_empty(&vou_dev->queue)) { |
| if (printk_timed_ratelimit(&j, 500)) |
| dev_warn(vou_dev->v4l2_dev.dev, |
| "IRQ without active buffer: %x!\n", irq_status); |
| /* Just ack: buf_release will disable further interrupts */ |
| sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300); |
| spin_unlock(&vou_dev->lock); |
| return IRQ_HANDLED; |
| } |
| |
| masked = ~(0x300 & irq_status) & irq_status & 0x30304; |
| dev_dbg(vou_dev->v4l2_dev.dev, |
| "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n", |
| irq_status, masked, vou_status, cnt); |
| |
| cnt++; |
| /* side = vou_status & 0x10000; */ |
| |
| /* Clear only set interrupts */ |
| sh_vou_reg_a_write(vou_dev, VOUIR, masked); |
| |
| vb = vou_dev->active; |
| list_del(&vb->queue); |
| |
| vb->state = VIDEOBUF_DONE; |
| v4l2_get_timestamp(&vb->ts); |
| vb->field_count++; |
| wake_up(&vb->done); |
| |
| if (list_empty(&vou_dev->queue)) { |
| /* Stop VOU */ |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n", |
| __func__, cnt); |
| sh_vou_reg_a_set(vou_dev, VOUER, 0, 1); |
| vou_dev->active = NULL; |
| vou_dev->status = SH_VOU_INITIALISING; |
| /* Disable End-of-Frame (VSYNC) interrupts */ |
| sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000); |
| spin_unlock(&vou_dev->lock); |
| return IRQ_HANDLED; |
| } |
| |
| vou_dev->active = list_entry(vou_dev->queue.next, |
| struct videobuf_buffer, queue); |
| |
| if (vou_dev->active->queue.next != &vou_dev->queue) { |
| struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next, |
| struct videobuf_buffer, queue); |
| sh_vou_schedule_next(vou_dev, new); |
| } |
| |
| spin_unlock(&vou_dev->lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int sh_vou_hw_init(struct sh_vou_device *vou_dev) |
| { |
| struct sh_vou_pdata *pdata = vou_dev->pdata; |
| u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29; |
| int i = 100; |
| |
| /* Disable all IRQs */ |
| sh_vou_reg_a_write(vou_dev, VOUIR, 0); |
| |
| /* Reset VOU interfaces - registers unaffected */ |
| sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101); |
| while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101)) |
| udelay(1); |
| |
| if (!i) |
| return -ETIMEDOUT; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i); |
| |
| if (pdata->flags & SH_VOU_PCLK_FALLING) |
| voucr |= 1 << 28; |
| if (pdata->flags & SH_VOU_HSYNC_LOW) |
| voucr |= 1 << 27; |
| if (pdata->flags & SH_VOU_VSYNC_LOW) |
| voucr |= 1 << 26; |
| sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000); |
| |
| /* Manual register side switching at first */ |
| sh_vou_reg_a_write(vou_dev, VOURCR, 4); |
| /* Default - fixed HSYNC length, can be made configurable is required */ |
| sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000); |
| |
| return 0; |
| } |
| |
| /* File operations */ |
| static int sh_vou_open(struct file *file) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file), |
| GFP_KERNEL); |
| |
| if (!vou_file) |
| return -ENOMEM; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| if (mutex_lock_interruptible(&vou_dev->fop_lock)) { |
| kfree(vou_file); |
| return -ERESTARTSYS; |
| } |
| if (atomic_inc_return(&vou_dev->use_count) == 1) { |
| int ret; |
| /* First open */ |
| vou_dev->status = SH_VOU_INITIALISING; |
| pm_runtime_get_sync(vou_dev->v4l2_dev.dev); |
| ret = sh_vou_hw_init(vou_dev); |
| if (ret < 0) { |
| atomic_dec(&vou_dev->use_count); |
| pm_runtime_put(vou_dev->v4l2_dev.dev); |
| vou_dev->status = SH_VOU_IDLE; |
| mutex_unlock(&vou_dev->fop_lock); |
| kfree(vou_file); |
| return ret; |
| } |
| } |
| |
| videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops, |
| vou_dev->v4l2_dev.dev, &vou_dev->lock, |
| V4L2_BUF_TYPE_VIDEO_OUTPUT, |
| V4L2_FIELD_NONE, |
| sizeof(struct videobuf_buffer), |
| &vou_dev->vdev, &vou_dev->fop_lock); |
| mutex_unlock(&vou_dev->fop_lock); |
| |
| file->private_data = vou_file; |
| |
| return 0; |
| } |
| |
| static int sh_vou_release(struct file *file) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = file->private_data; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| if (!atomic_dec_return(&vou_dev->use_count)) { |
| mutex_lock(&vou_dev->fop_lock); |
| /* Last close */ |
| vou_dev->status = SH_VOU_IDLE; |
| sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101); |
| pm_runtime_put(vou_dev->v4l2_dev.dev); |
| mutex_unlock(&vou_dev->fop_lock); |
| } |
| |
| file->private_data = NULL; |
| kfree(vou_file); |
| |
| return 0; |
| } |
| |
| static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = file->private_data; |
| int ret; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| if (mutex_lock_interruptible(&vou_dev->fop_lock)) |
| return -ERESTARTSYS; |
| ret = videobuf_mmap_mapper(&vou_file->vbq, vma); |
| mutex_unlock(&vou_dev->fop_lock); |
| return ret; |
| } |
| |
| static unsigned int sh_vou_poll(struct file *file, poll_table *wait) |
| { |
| struct sh_vou_device *vou_dev = video_drvdata(file); |
| struct sh_vou_file *vou_file = file->private_data; |
| unsigned int res; |
| |
| dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); |
| |
| mutex_lock(&vou_dev->fop_lock); |
| res = videobuf_poll_stream(file, &vou_file->vbq, wait); |
| mutex_unlock(&vou_dev->fop_lock); |
| return res; |
| } |
| |
| /* sh_vou display ioctl operations */ |
| static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = { |
| .vidioc_querycap = sh_vou_querycap, |
| .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out, |
| .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out, |
| .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out, |
| .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out, |
| .vidioc_reqbufs = sh_vou_reqbufs, |
| .vidioc_querybuf = sh_vou_querybuf, |
| .vidioc_qbuf = sh_vou_qbuf, |
| .vidioc_dqbuf = sh_vou_dqbuf, |
| .vidioc_streamon = sh_vou_streamon, |
| .vidioc_streamoff = sh_vou_streamoff, |
| .vidioc_s_std = sh_vou_s_std, |
| .vidioc_g_std = sh_vou_g_std, |
| .vidioc_cropcap = sh_vou_cropcap, |
| .vidioc_g_crop = sh_vou_g_crop, |
| .vidioc_s_crop = sh_vou_s_crop, |
| }; |
| |
| static const struct v4l2_file_operations sh_vou_fops = { |
| .owner = THIS_MODULE, |
| .open = sh_vou_open, |
| .release = sh_vou_release, |
| .unlocked_ioctl = video_ioctl2, |
| .mmap = sh_vou_mmap, |
| .poll = sh_vou_poll, |
| }; |
| |
| static const struct video_device sh_vou_video_template = { |
| .name = "sh_vou", |
| .fops = &sh_vou_fops, |
| .ioctl_ops = &sh_vou_ioctl_ops, |
| .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */ |
| .vfl_dir = VFL_DIR_TX, |
| }; |
| |
| static int sh_vou_probe(struct platform_device *pdev) |
| { |
| struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data; |
| struct v4l2_rect *rect; |
| struct v4l2_pix_format *pix; |
| struct i2c_adapter *i2c_adap; |
| struct video_device *vdev; |
| struct sh_vou_device *vou_dev; |
| struct resource *reg_res, *region; |
| struct v4l2_subdev *subdev; |
| int irq, ret; |
| |
| reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| irq = platform_get_irq(pdev, 0); |
| |
| if (!vou_pdata || !reg_res || irq <= 0) { |
| dev_err(&pdev->dev, "Insufficient VOU platform information.\n"); |
| return -ENODEV; |
| } |
| |
| vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL); |
| if (!vou_dev) |
| return -ENOMEM; |
| |
| INIT_LIST_HEAD(&vou_dev->queue); |
| spin_lock_init(&vou_dev->lock); |
| mutex_init(&vou_dev->fop_lock); |
| atomic_set(&vou_dev->use_count, 0); |
| vou_dev->pdata = vou_pdata; |
| vou_dev->status = SH_VOU_IDLE; |
| |
| rect = &vou_dev->rect; |
| pix = &vou_dev->pix; |
| |
| /* Fill in defaults */ |
| vou_dev->std = V4L2_STD_NTSC_M; |
| rect->left = 0; |
| rect->top = 0; |
| rect->width = VOU_MAX_IMAGE_WIDTH; |
| rect->height = 480; |
| pix->width = VOU_MAX_IMAGE_WIDTH; |
| pix->height = 480; |
| pix->pixelformat = V4L2_PIX_FMT_YVYU; |
| pix->field = V4L2_FIELD_NONE; |
| pix->bytesperline = VOU_MAX_IMAGE_WIDTH * 2; |
| pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480; |
| pix->colorspace = V4L2_COLORSPACE_SMPTE170M; |
| |
| region = request_mem_region(reg_res->start, resource_size(reg_res), |
| pdev->name); |
| if (!region) { |
| dev_err(&pdev->dev, "VOU region already claimed\n"); |
| ret = -EBUSY; |
| goto ereqmemreg; |
| } |
| |
| vou_dev->base = ioremap(reg_res->start, resource_size(reg_res)); |
| if (!vou_dev->base) { |
| ret = -ENOMEM; |
| goto emap; |
| } |
| |
| ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev); |
| if (ret < 0) |
| goto ereqirq; |
| |
| ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "Error registering v4l2 device\n"); |
| goto ev4l2devreg; |
| } |
| |
| vdev = &vou_dev->vdev; |
| *vdev = sh_vou_video_template; |
| if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT) |
| vdev->tvnorms |= V4L2_STD_PAL; |
| vdev->v4l2_dev = &vou_dev->v4l2_dev; |
| vdev->release = video_device_release_empty; |
| vdev->lock = &vou_dev->fop_lock; |
| |
| video_set_drvdata(vdev, vou_dev); |
| |
| pm_runtime_enable(&pdev->dev); |
| pm_runtime_resume(&pdev->dev); |
| |
| i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap); |
| if (!i2c_adap) { |
| ret = -ENODEV; |
| goto ei2cgadap; |
| } |
| |
| ret = sh_vou_hw_init(vou_dev); |
| if (ret < 0) |
| goto ereset; |
| |
| subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap, |
| vou_pdata->board_info, NULL); |
| if (!subdev) { |
| ret = -ENOMEM; |
| goto ei2cnd; |
| } |
| |
| ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); |
| if (ret < 0) |
| goto evregdev; |
| |
| return 0; |
| |
| evregdev: |
| ei2cnd: |
| ereset: |
| i2c_put_adapter(i2c_adap); |
| ei2cgadap: |
| pm_runtime_disable(&pdev->dev); |
| v4l2_device_unregister(&vou_dev->v4l2_dev); |
| ev4l2devreg: |
| free_irq(irq, vou_dev); |
| ereqirq: |
| iounmap(vou_dev->base); |
| emap: |
| release_mem_region(reg_res->start, resource_size(reg_res)); |
| ereqmemreg: |
| kfree(vou_dev); |
| return ret; |
| } |
| |
| static int sh_vou_remove(struct platform_device *pdev) |
| { |
| int irq = platform_get_irq(pdev, 0); |
| struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); |
| struct sh_vou_device *vou_dev = container_of(v4l2_dev, |
| struct sh_vou_device, v4l2_dev); |
| struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next, |
| struct v4l2_subdev, list); |
| struct i2c_client *client = v4l2_get_subdevdata(sd); |
| struct resource *reg_res; |
| |
| if (irq > 0) |
| free_irq(irq, vou_dev); |
| pm_runtime_disable(&pdev->dev); |
| video_unregister_device(&vou_dev->vdev); |
| i2c_put_adapter(client->adapter); |
| v4l2_device_unregister(&vou_dev->v4l2_dev); |
| iounmap(vou_dev->base); |
| reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (reg_res) |
| release_mem_region(reg_res->start, resource_size(reg_res)); |
| kfree(vou_dev); |
| return 0; |
| } |
| |
| static struct platform_driver __refdata sh_vou = { |
| .remove = sh_vou_remove, |
| .driver = { |
| .name = "sh-vou", |
| }, |
| }; |
| |
| module_platform_driver_probe(sh_vou, sh_vou_probe); |
| |
| MODULE_DESCRIPTION("SuperH VOU driver"); |
| MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_VERSION("0.1.0"); |
| MODULE_ALIAS("platform:sh-vou"); |