diff options
Diffstat (limited to 'kernel/drivers/media/pci/tw68/tw68-video.c')
| -rw-r--r-- | kernel/drivers/media/pci/tw68/tw68-video.c | 1044 |
1 files changed, 1044 insertions, 0 deletions
diff --git a/kernel/drivers/media/pci/tw68/tw68-video.c b/kernel/drivers/media/pci/tw68/tw68-video.c new file mode 100644 index 000000000..8355e55b4 --- /dev/null +++ b/kernel/drivers/media/pci/tw68/tw68-video.c @@ -0,0 +1,1044 @@ +/* + * tw68 functions to handle video data + * + * Much of this code is derived from the cx88 and sa7134 drivers, which + * were in turn derived from the bt87x driver. The original work was by + * Gerd Knorr; more recently the code was enhanced by Mauro Carvalho Chehab, + * Hans Verkuil, Andy Walls and many others. Their work is gratefully + * acknowledged. Full credit goes to them - any problems within this code + * are mine. + * + * Copyright (C) 2009 William M. Brack + * + * Refactored and updated to the latest v4l core frameworks: + * + * Copyright (C) 2014 Hans Verkuil <hverkuil@xs4all.nl> + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <media/v4l2-common.h> +#include <media/v4l2-event.h> +#include <media/videobuf2-dma-sg.h> + +#include "tw68.h" +#include "tw68-reg.h" + +/* ------------------------------------------------------------------ */ +/* data structs for video */ +/* + * FIXME - + * Note that the saa7134 has formats, e.g. YUV420, which are classified + * as "planar". These affect overlay mode, and are flagged with a field + * ".planar" in the format. Do we need to implement this in this driver? + */ +static const struct tw68_format formats[] = { + { + .name = "15 bpp RGB, le", + .fourcc = V4L2_PIX_FMT_RGB555, + .depth = 16, + .twformat = ColorFormatRGB15, + }, { + .name = "15 bpp RGB, be", + .fourcc = V4L2_PIX_FMT_RGB555X, + .depth = 16, + .twformat = ColorFormatRGB15 | ColorFormatBSWAP, + }, { + .name = "16 bpp RGB, le", + .fourcc = V4L2_PIX_FMT_RGB565, + .depth = 16, + .twformat = ColorFormatRGB16, + }, { + .name = "16 bpp RGB, be", + .fourcc = V4L2_PIX_FMT_RGB565X, + .depth = 16, + .twformat = ColorFormatRGB16 | ColorFormatBSWAP, + }, { + .name = "24 bpp RGB, le", + .fourcc = V4L2_PIX_FMT_BGR24, + .depth = 24, + .twformat = ColorFormatRGB24, + }, { + .name = "24 bpp RGB, be", + .fourcc = V4L2_PIX_FMT_RGB24, + .depth = 24, + .twformat = ColorFormatRGB24 | ColorFormatBSWAP, + }, { + .name = "32 bpp RGB, le", + .fourcc = V4L2_PIX_FMT_BGR32, + .depth = 32, + .twformat = ColorFormatRGB32, + }, { + .name = "32 bpp RGB, be", + .fourcc = V4L2_PIX_FMT_RGB32, + .depth = 32, + .twformat = ColorFormatRGB32 | ColorFormatBSWAP | + ColorFormatWSWAP, + }, { + .name = "4:2:2 packed, YUYV", + .fourcc = V4L2_PIX_FMT_YUYV, + .depth = 16, + .twformat = ColorFormatYUY2, + }, { + .name = "4:2:2 packed, UYVY", + .fourcc = V4L2_PIX_FMT_UYVY, + .depth = 16, + .twformat = ColorFormatYUY2 | ColorFormatBSWAP, + } +}; +#define FORMATS ARRAY_SIZE(formats) + +#define NORM_625_50 \ + .h_delay = 3, \ + .h_delay0 = 133, \ + .h_start = 0, \ + .h_stop = 719, \ + .v_delay = 24, \ + .vbi_v_start_0 = 7, \ + .vbi_v_stop_0 = 22, \ + .video_v_start = 24, \ + .video_v_stop = 311, \ + .vbi_v_start_1 = 319 + +#define NORM_525_60 \ + .h_delay = 8, \ + .h_delay0 = 138, \ + .h_start = 0, \ + .h_stop = 719, \ + .v_delay = 22, \ + .vbi_v_start_0 = 10, \ + .vbi_v_stop_0 = 21, \ + .video_v_start = 22, \ + .video_v_stop = 262, \ + .vbi_v_start_1 = 273 + +/* + * The following table is searched by tw68_s_std, first for a specific + * match, then for an entry which contains the desired id. The table + * entries should therefore be ordered in ascending order of specificity. + */ +static const struct tw68_tvnorm tvnorms[] = { + { + .name = "PAL", /* autodetect */ + .id = V4L2_STD_PAL, + NORM_625_50, + + .sync_control = 0x18, + .luma_control = 0x40, + .chroma_ctrl1 = 0x81, + .chroma_gain = 0x2a, + .chroma_ctrl2 = 0x06, + .vgate_misc = 0x1c, + .format = VideoFormatPALBDGHI, + }, { + .name = "NTSC", + .id = V4L2_STD_NTSC, + NORM_525_60, + + .sync_control = 0x59, + .luma_control = 0x40, + .chroma_ctrl1 = 0x89, + .chroma_gain = 0x2a, + .chroma_ctrl2 = 0x0e, + .vgate_misc = 0x18, + .format = VideoFormatNTSC, + }, { + .name = "SECAM", + .id = V4L2_STD_SECAM, + NORM_625_50, + + .sync_control = 0x18, + .luma_control = 0x1b, + .chroma_ctrl1 = 0xd1, + .chroma_gain = 0x80, + .chroma_ctrl2 = 0x00, + .vgate_misc = 0x1c, + .format = VideoFormatSECAM, + }, { + .name = "PAL-M", + .id = V4L2_STD_PAL_M, + NORM_525_60, + + .sync_control = 0x59, + .luma_control = 0x40, + .chroma_ctrl1 = 0xb9, + .chroma_gain = 0x2a, + .chroma_ctrl2 = 0x0e, + .vgate_misc = 0x18, + .format = VideoFormatPALM, + }, { + .name = "PAL-Nc", + .id = V4L2_STD_PAL_Nc, + NORM_625_50, + + .sync_control = 0x18, + .luma_control = 0x40, + .chroma_ctrl1 = 0xa1, + .chroma_gain = 0x2a, + .chroma_ctrl2 = 0x06, + .vgate_misc = 0x1c, + .format = VideoFormatPALNC, + }, { + .name = "PAL-60", + .id = V4L2_STD_PAL_60, + .h_delay = 186, + .h_start = 0, + .h_stop = 719, + .v_delay = 26, + .video_v_start = 23, + .video_v_stop = 262, + .vbi_v_start_0 = 10, + .vbi_v_stop_0 = 21, + .vbi_v_start_1 = 273, + + .sync_control = 0x18, + .luma_control = 0x40, + .chroma_ctrl1 = 0x81, + .chroma_gain = 0x2a, + .chroma_ctrl2 = 0x06, + .vgate_misc = 0x1c, + .format = VideoFormatPAL60, + } +}; +#define TVNORMS ARRAY_SIZE(tvnorms) + +static const struct tw68_format *format_by_fourcc(unsigned int fourcc) +{ + unsigned int i; + + for (i = 0; i < FORMATS; i++) + if (formats[i].fourcc == fourcc) + return formats+i; + return NULL; +} + + +/* ------------------------------------------------------------------ */ +/* + * Note that the cropping rectangles are described in terms of a single + * frame, i.e. line positions are only 1/2 the interlaced equivalent + */ +static void set_tvnorm(struct tw68_dev *dev, const struct tw68_tvnorm *norm) +{ + if (norm != dev->tvnorm) { + dev->width = 720; + dev->height = (norm->id & V4L2_STD_525_60) ? 480 : 576; + dev->tvnorm = norm; + tw68_set_tvnorm_hw(dev); + } +} + +/* + * tw68_set_scale + * + * Scaling and Cropping for video decoding + * + * We are working with 3 values for horizontal and vertical - scale, + * delay and active. + * + * HACTIVE represent the actual number of pixels in the "usable" image, + * before scaling. HDELAY represents the number of pixels skipped + * between the start of the horizontal sync and the start of the image. + * HSCALE is calculated using the formula + * HSCALE = (HACTIVE / (#pixels desired)) * 256 + * + * The vertical registers are similar, except based upon the total number + * of lines in the image, and the first line of the image (i.e. ignoring + * vertical sync and VBI). + * + * Note that the number of bytes reaching the FIFO (and hence needing + * to be processed by the DMAP program) is completely dependent upon + * these values, especially HSCALE. + * + * Parameters: + * @dev pointer to the device structure, needed for + * getting current norm (as well as debug print) + * @width actual image width (from user buffer) + * @height actual image height + * @field indicates Top, Bottom or Interlaced + */ +static int tw68_set_scale(struct tw68_dev *dev, unsigned int width, + unsigned int height, enum v4l2_field field) +{ + const struct tw68_tvnorm *norm = dev->tvnorm; + /* set individually for debugging clarity */ + int hactive, hdelay, hscale; + int vactive, vdelay, vscale; + int comb; + + if (V4L2_FIELD_HAS_BOTH(field)) /* if field is interlaced */ + height /= 2; /* we must set for 1-frame */ + + pr_debug("%s: width=%d, height=%d, both=%d\n" + " tvnorm h_delay=%d, h_start=%d, h_stop=%d, " + "v_delay=%d, v_start=%d, v_stop=%d\n" , __func__, + width, height, V4L2_FIELD_HAS_BOTH(field), + norm->h_delay, norm->h_start, norm->h_stop, + norm->v_delay, norm->video_v_start, + norm->video_v_stop); + + switch (dev->vdecoder) { + case TW6800: + hdelay = norm->h_delay0; + break; + default: + hdelay = norm->h_delay; + break; + } + + hdelay += norm->h_start; + hactive = norm->h_stop - norm->h_start + 1; + + hscale = (hactive * 256) / (width); + + vdelay = norm->v_delay; + vactive = ((norm->id & V4L2_STD_525_60) ? 524 : 624) / 2 - norm->video_v_start; + vscale = (vactive * 256) / height; + + pr_debug("%s: %dx%d [%s%s,%s]\n", __func__, + width, height, + V4L2_FIELD_HAS_TOP(field) ? "T" : "", + V4L2_FIELD_HAS_BOTTOM(field) ? "B" : "", + v4l2_norm_to_name(dev->tvnorm->id)); + pr_debug("%s: hactive=%d, hdelay=%d, hscale=%d; " + "vactive=%d, vdelay=%d, vscale=%d\n", __func__, + hactive, hdelay, hscale, vactive, vdelay, vscale); + + comb = ((vdelay & 0x300) >> 2) | + ((vactive & 0x300) >> 4) | + ((hdelay & 0x300) >> 6) | + ((hactive & 0x300) >> 8); + pr_debug("%s: setting CROP_HI=%02x, VDELAY_LO=%02x, " + "VACTIVE_LO=%02x, HDELAY_LO=%02x, HACTIVE_LO=%02x\n", + __func__, comb, vdelay, vactive, hdelay, hactive); + tw_writeb(TW68_CROP_HI, comb); + tw_writeb(TW68_VDELAY_LO, vdelay & 0xff); + tw_writeb(TW68_VACTIVE_LO, vactive & 0xff); + tw_writeb(TW68_HDELAY_LO, hdelay & 0xff); + tw_writeb(TW68_HACTIVE_LO, hactive & 0xff); + + comb = ((vscale & 0xf00) >> 4) | ((hscale & 0xf00) >> 8); + pr_debug("%s: setting SCALE_HI=%02x, VSCALE_LO=%02x, " + "HSCALE_LO=%02x\n", __func__, comb, vscale, hscale); + tw_writeb(TW68_SCALE_HI, comb); + tw_writeb(TW68_VSCALE_LO, vscale); + tw_writeb(TW68_HSCALE_LO, hscale); + + return 0; +} + +/* ------------------------------------------------------------------ */ + +int tw68_video_start_dma(struct tw68_dev *dev, struct tw68_buf *buf) +{ + /* Set cropping and scaling */ + tw68_set_scale(dev, dev->width, dev->height, dev->field); + /* + * Set start address for RISC program. Note that if the DMAP + * processor is currently running, it must be stopped before + * a new address can be set. + */ + tw_clearl(TW68_DMAC, TW68_DMAP_EN); + tw_writel(TW68_DMAP_SA, buf->dma); + /* Clear any pending interrupts */ + tw_writel(TW68_INTSTAT, dev->board_virqmask); + /* Enable the risc engine and the fifo */ + tw_andorl(TW68_DMAC, 0xff, dev->fmt->twformat | + ColorFormatGamma | TW68_DMAP_EN | TW68_FIFO_EN); + dev->pci_irqmask |= dev->board_virqmask; + tw_setl(TW68_INTMASK, dev->pci_irqmask); + return 0; +} + +/* ------------------------------------------------------------------ */ + +/* calc max # of buffers from size (must not exceed the 4MB virtual + * address space per DMA channel) */ +static int tw68_buffer_count(unsigned int size, unsigned int count) +{ + unsigned int maxcount; + + maxcount = (4 * 1024 * 1024) / roundup(size, PAGE_SIZE); + if (count > maxcount) + count = maxcount; + return count; +} + +/* ------------------------------------------------------------- */ +/* vb2 queue operations */ + +static int tw68_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt, + unsigned int *num_buffers, unsigned int *num_planes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct tw68_dev *dev = vb2_get_drv_priv(q); + unsigned tot_bufs = q->num_buffers + *num_buffers; + + sizes[0] = (dev->fmt->depth * dev->width * dev->height) >> 3; + alloc_ctxs[0] = dev->alloc_ctx; + /* + * We allow create_bufs, but only if the sizeimage is the same as the + * current sizeimage. The tw68_buffer_count calculation becomes quite + * difficult otherwise. + */ + if (fmt && fmt->fmt.pix.sizeimage < sizes[0]) + return -EINVAL; + *num_planes = 1; + if (tot_bufs < 2) + tot_bufs = 2; + tot_bufs = tw68_buffer_count(sizes[0], tot_bufs); + *num_buffers = tot_bufs - q->num_buffers; + + return 0; +} + +/* + * The risc program for each buffers works as follows: it starts with a simple + * 'JUMP to addr + 8', which is effectively a NOP. Then the program to DMA the + * buffer follows and at the end we have a JUMP back to the start + 8 (skipping + * the initial JUMP). + * + * This is the program of the first buffer to be queued if the active list is + * empty and it just keeps DMAing this buffer without generating any interrupts. + * + * If a new buffer is added then the initial JUMP in the program generates an + * interrupt as well which signals that the previous buffer has been DMAed + * successfully and that it can be returned to userspace. + * + * It also sets the final jump of the previous buffer to the start of the new + * buffer, thus chaining the new buffer into the DMA chain. This is a single + * atomic u32 write, so there is no race condition. + * + * The end-result of all this that you only get an interrupt when a buffer + * is ready, so the control flow is very easy. + */ +static void tw68_buf_queue(struct vb2_buffer *vb) +{ + struct vb2_queue *vq = vb->vb2_queue; + struct tw68_dev *dev = vb2_get_drv_priv(vq); + struct tw68_buf *buf = container_of(vb, struct tw68_buf, vb); + struct tw68_buf *prev; + unsigned long flags; + + spin_lock_irqsave(&dev->slock, flags); + + /* append a 'JUMP to start of buffer' to the buffer risc program */ + buf->jmp[0] = cpu_to_le32(RISC_JUMP); + buf->jmp[1] = cpu_to_le32(buf->dma + 8); + + if (!list_empty(&dev->active)) { + prev = list_entry(dev->active.prev, struct tw68_buf, list); + buf->cpu[0] |= cpu_to_le32(RISC_INT_BIT); + prev->jmp[1] = cpu_to_le32(buf->dma); + } + list_add_tail(&buf->list, &dev->active); + spin_unlock_irqrestore(&dev->slock, flags); +} + +/* + * buffer_prepare + * + * Set the ancilliary information into the buffer structure. This + * includes generating the necessary risc program if it hasn't already + * been done for the current buffer format. + * The structure fh contains the details of the format requested by the + * user - type, width, height and #fields. This is compared with the + * last format set for the current buffer. If they differ, the risc + * code (which controls the filling of the buffer) is (re-)generated. + */ +static int tw68_buf_prepare(struct vb2_buffer *vb) +{ + struct vb2_queue *vq = vb->vb2_queue; + struct tw68_dev *dev = vb2_get_drv_priv(vq); + struct tw68_buf *buf = container_of(vb, struct tw68_buf, vb); + struct sg_table *dma = vb2_dma_sg_plane_desc(vb, 0); + unsigned size, bpl; + + size = (dev->width * dev->height * dev->fmt->depth) >> 3; + if (vb2_plane_size(vb, 0) < size) + return -EINVAL; + vb2_set_plane_payload(vb, 0, size); + + bpl = (dev->width * dev->fmt->depth) >> 3; + switch (dev->field) { + case V4L2_FIELD_TOP: + tw68_risc_buffer(dev->pci, buf, dma->sgl, + 0, UNSET, bpl, 0, dev->height); + break; + case V4L2_FIELD_BOTTOM: + tw68_risc_buffer(dev->pci, buf, dma->sgl, + UNSET, 0, bpl, 0, dev->height); + break; + case V4L2_FIELD_SEQ_TB: + tw68_risc_buffer(dev->pci, buf, dma->sgl, + 0, bpl * (dev->height >> 1), + bpl, 0, dev->height >> 1); + break; + case V4L2_FIELD_SEQ_BT: + tw68_risc_buffer(dev->pci, buf, dma->sgl, + bpl * (dev->height >> 1), 0, + bpl, 0, dev->height >> 1); + break; + case V4L2_FIELD_INTERLACED: + default: + tw68_risc_buffer(dev->pci, buf, dma->sgl, + 0, bpl, bpl, bpl, dev->height >> 1); + break; + } + return 0; +} + +static void tw68_buf_finish(struct vb2_buffer *vb) +{ + struct vb2_queue *vq = vb->vb2_queue; + struct tw68_dev *dev = vb2_get_drv_priv(vq); + struct tw68_buf *buf = container_of(vb, struct tw68_buf, vb); + + pci_free_consistent(dev->pci, buf->size, buf->cpu, buf->dma); +} + +static int tw68_start_streaming(struct vb2_queue *q, unsigned int count) +{ + struct tw68_dev *dev = vb2_get_drv_priv(q); + struct tw68_buf *buf = + container_of(dev->active.next, struct tw68_buf, list); + + dev->seqnr = 0; + tw68_video_start_dma(dev, buf); + return 0; +} + +static void tw68_stop_streaming(struct vb2_queue *q) +{ + struct tw68_dev *dev = vb2_get_drv_priv(q); + + /* Stop risc & fifo */ + tw_clearl(TW68_DMAC, TW68_DMAP_EN | TW68_FIFO_EN); + while (!list_empty(&dev->active)) { + struct tw68_buf *buf = + container_of(dev->active.next, struct tw68_buf, list); + + list_del(&buf->list); + vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); + } +} + +static struct vb2_ops tw68_video_qops = { + .queue_setup = tw68_queue_setup, + .buf_queue = tw68_buf_queue, + .buf_prepare = tw68_buf_prepare, + .buf_finish = tw68_buf_finish, + .start_streaming = tw68_start_streaming, + .stop_streaming = tw68_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +/* ------------------------------------------------------------------ */ + +static int tw68_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct tw68_dev *dev = + container_of(ctrl->handler, struct tw68_dev, hdl); + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + tw_writeb(TW68_BRIGHT, ctrl->val); + break; + case V4L2_CID_HUE: + tw_writeb(TW68_HUE, ctrl->val); + break; + case V4L2_CID_CONTRAST: + tw_writeb(TW68_CONTRAST, ctrl->val); + break; + case V4L2_CID_SATURATION: + tw_writeb(TW68_SAT_U, ctrl->val); + tw_writeb(TW68_SAT_V, ctrl->val); + break; + case V4L2_CID_COLOR_KILLER: + if (ctrl->val) + tw_andorb(TW68_MISC2, 0xe0, 0xe0); + else + tw_andorb(TW68_MISC2, 0xe0, 0x00); + break; + case V4L2_CID_CHROMA_AGC: + if (ctrl->val) + tw_andorb(TW68_LOOP, 0x30, 0x20); + else + tw_andorb(TW68_LOOP, 0x30, 0x00); + break; + } + return 0; +} + +/* ------------------------------------------------------------------ */ + +/* + * Note that this routine returns what is stored in the fh structure, and + * does not interrogate any of the device registers. + */ +static int tw68_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct tw68_dev *dev = video_drvdata(file); + + f->fmt.pix.width = dev->width; + f->fmt.pix.height = dev->height; + f->fmt.pix.field = dev->field; + f->fmt.pix.pixelformat = dev->fmt->fourcc; + f->fmt.pix.bytesperline = + (f->fmt.pix.width * (dev->fmt->depth)) >> 3; + f->fmt.pix.sizeimage = + f->fmt.pix.height * f->fmt.pix.bytesperline; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + f->fmt.pix.priv = 0; + return 0; +} + +static int tw68_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct tw68_dev *dev = video_drvdata(file); + const struct tw68_format *fmt; + enum v4l2_field field; + unsigned int maxh; + + fmt = format_by_fourcc(f->fmt.pix.pixelformat); + if (NULL == fmt) + return -EINVAL; + + field = f->fmt.pix.field; + maxh = (dev->tvnorm->id & V4L2_STD_525_60) ? 480 : 576; + + switch (field) { + case V4L2_FIELD_TOP: + case V4L2_FIELD_BOTTOM: + break; + case V4L2_FIELD_INTERLACED: + case V4L2_FIELD_SEQ_BT: + case V4L2_FIELD_SEQ_TB: + maxh = maxh * 2; + break; + default: + field = (f->fmt.pix.height > maxh / 2) + ? V4L2_FIELD_INTERLACED + : V4L2_FIELD_BOTTOM; + break; + } + + f->fmt.pix.field = field; + if (f->fmt.pix.width < 48) + f->fmt.pix.width = 48; + if (f->fmt.pix.height < 32) + f->fmt.pix.height = 32; + if (f->fmt.pix.width > 720) + f->fmt.pix.width = 720; + if (f->fmt.pix.height > maxh) + f->fmt.pix.height = maxh; + f->fmt.pix.width &= ~0x03; + f->fmt.pix.bytesperline = + (f->fmt.pix.width * (fmt->depth)) >> 3; + f->fmt.pix.sizeimage = + f->fmt.pix.height * f->fmt.pix.bytesperline; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + return 0; +} + +/* + * Note that tw68_s_fmt_vid_cap sets the information into the fh structure, + * and it will be used for all future new buffers. However, there could be + * some number of buffers on the "active" chain which will be filled before + * the change takes place. + */ +static int tw68_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct tw68_dev *dev = video_drvdata(file); + int err; + + err = tw68_try_fmt_vid_cap(file, priv, f); + if (0 != err) + return err; + + dev->fmt = format_by_fourcc(f->fmt.pix.pixelformat); + dev->width = f->fmt.pix.width; + dev->height = f->fmt.pix.height; + dev->field = f->fmt.pix.field; + return 0; +} + +static int tw68_enum_input(struct file *file, void *priv, + struct v4l2_input *i) +{ + struct tw68_dev *dev = video_drvdata(file); + unsigned int n; + + n = i->index; + if (n >= TW68_INPUT_MAX) + return -EINVAL; + i->index = n; + i->type = V4L2_INPUT_TYPE_CAMERA; + snprintf(i->name, sizeof(i->name), "Composite %d", n); + + /* If the query is for the current input, get live data */ + if (n == dev->input) { + int v1 = tw_readb(TW68_STATUS1); + int v2 = tw_readb(TW68_MVSN); + + if (0 != (v1 & (1 << 7))) + i->status |= V4L2_IN_ST_NO_SYNC; + if (0 != (v1 & (1 << 6))) + i->status |= V4L2_IN_ST_NO_H_LOCK; + if (0 != (v1 & (1 << 2))) + i->status |= V4L2_IN_ST_NO_SIGNAL; + if (0 != (v1 & 1 << 1)) + i->status |= V4L2_IN_ST_NO_COLOR; + if (0 != (v2 & (1 << 2))) + i->status |= V4L2_IN_ST_MACROVISION; + } + i->std = video_devdata(file)->tvnorms; + return 0; +} + +static int tw68_g_input(struct file *file, void *priv, unsigned int *i) +{ + struct tw68_dev *dev = video_drvdata(file); + + *i = dev->input; + return 0; +} + +static int tw68_s_input(struct file *file, void *priv, unsigned int i) +{ + struct tw68_dev *dev = video_drvdata(file); + + if (i >= TW68_INPUT_MAX) + return -EINVAL; + dev->input = i; + tw_andorb(TW68_INFORM, 0x03 << 2, dev->input << 2); + return 0; +} + +static int tw68_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct tw68_dev *dev = video_drvdata(file); + + strcpy(cap->driver, "tw68"); + strlcpy(cap->card, "Techwell Capture Card", + sizeof(cap->card)); + sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci)); + cap->device_caps = + V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_READWRITE | + V4L2_CAP_STREAMING; + + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + return 0; +} + +static int tw68_s_std(struct file *file, void *priv, v4l2_std_id id) +{ + struct tw68_dev *dev = video_drvdata(file); + unsigned int i; + + if (vb2_is_busy(&dev->vidq)) + return -EBUSY; + + /* Look for match on complete norm id (may have mult bits) */ + for (i = 0; i < TVNORMS; i++) { + if (id == tvnorms[i].id) + break; + } + + /* If no exact match, look for norm which contains this one */ + if (i == TVNORMS) { + for (i = 0; i < TVNORMS; i++) + if (id & tvnorms[i].id) + break; + } + /* If still not matched, give up */ + if (i == TVNORMS) + return -EINVAL; + + set_tvnorm(dev, &tvnorms[i]); /* do the actual setting */ + return 0; +} + +static int tw68_g_std(struct file *file, void *priv, v4l2_std_id *id) +{ + struct tw68_dev *dev = video_drvdata(file); + + *id = dev->tvnorm->id; + return 0; +} + +static int tw68_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (f->index >= FORMATS) + return -EINVAL; + + strlcpy(f->description, formats[f->index].name, + sizeof(f->description)); + + f->pixelformat = formats[f->index].fourcc; + + return 0; +} + +/* + * Used strictly for internal development and debugging, this routine + * prints out the current register contents for the tw68xx device. + */ +static void tw68_dump_regs(struct tw68_dev *dev) +{ + unsigned char line[80]; + int i, j, k; + unsigned char *cptr; + + pr_info("Full dump of TW68 registers:\n"); + /* First we do the PCI regs, 8 4-byte regs per line */ + for (i = 0; i < 0x100; i += 32) { + cptr = line; + cptr += sprintf(cptr, "%03x ", i); + /* j steps through the next 4 words */ + for (j = i; j < i + 16; j += 4) + cptr += sprintf(cptr, "%08x ", tw_readl(j)); + *cptr++ = ' '; + for (; j < i + 32; j += 4) + cptr += sprintf(cptr, "%08x ", tw_readl(j)); + *cptr++ = '\n'; + *cptr = 0; + pr_info("%s", line); + } + /* Next the control regs, which are single-byte, address mod 4 */ + while (i < 0x400) { + cptr = line; + cptr += sprintf(cptr, "%03x ", i); + /* Print out 4 groups of 4 bytes */ + for (j = 0; j < 4; j++) { + for (k = 0; k < 4; k++) { + cptr += sprintf(cptr, "%02x ", + tw_readb(i)); + i += 4; + } + *cptr++ = ' '; + } + *cptr++ = '\n'; + *cptr = 0; + pr_info("%s", line); + } +} + +static int vidioc_log_status(struct file *file, void *priv) +{ + struct tw68_dev *dev = video_drvdata(file); + + tw68_dump_regs(dev); + return v4l2_ctrl_log_status(file, priv); +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int vidioc_g_register(struct file *file, void *priv, + struct v4l2_dbg_register *reg) +{ + struct tw68_dev *dev = video_drvdata(file); + + if (reg->size == 1) + reg->val = tw_readb(reg->reg); + else + reg->val = tw_readl(reg->reg); + return 0; +} + +static int vidioc_s_register(struct file *file, void *priv, + const struct v4l2_dbg_register *reg) +{ + struct tw68_dev *dev = video_drvdata(file); + + if (reg->size == 1) + tw_writeb(reg->reg, reg->val); + else + tw_writel(reg->reg & 0xffff, reg->val); + return 0; +} +#endif + +static const struct v4l2_ctrl_ops tw68_ctrl_ops = { + .s_ctrl = tw68_s_ctrl, +}; + +static const struct v4l2_file_operations video_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = vb2_fop_release, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops video_ioctl_ops = { + .vidioc_querycap = tw68_querycap, + .vidioc_enum_fmt_vid_cap = tw68_enum_fmt_vid_cap, + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_s_std = tw68_s_std, + .vidioc_g_std = tw68_g_std, + .vidioc_enum_input = tw68_enum_input, + .vidioc_g_input = tw68_g_input, + .vidioc_s_input = tw68_s_input, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + .vidioc_g_fmt_vid_cap = tw68_g_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = tw68_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = tw68_s_fmt_vid_cap, + .vidioc_log_status = vidioc_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .vidioc_g_register = vidioc_g_register, + .vidioc_s_register = vidioc_s_register, +#endif +}; + +static struct video_device tw68_video_template = { + .name = "tw68_video", + .fops = &video_fops, + .ioctl_ops = &video_ioctl_ops, + .release = video_device_release_empty, + .tvnorms = TW68_NORMS, +}; + +/* ------------------------------------------------------------------ */ +/* exported stuff */ +void tw68_set_tvnorm_hw(struct tw68_dev *dev) +{ + tw_andorb(TW68_SDT, 0x07, dev->tvnorm->format); +} + +int tw68_video_init1(struct tw68_dev *dev) +{ + struct v4l2_ctrl_handler *hdl = &dev->hdl; + + v4l2_ctrl_handler_init(hdl, 6); + v4l2_ctrl_new_std(hdl, &tw68_ctrl_ops, + V4L2_CID_BRIGHTNESS, -128, 127, 1, 20); + v4l2_ctrl_new_std(hdl, &tw68_ctrl_ops, + V4L2_CID_CONTRAST, 0, 255, 1, 100); + v4l2_ctrl_new_std(hdl, &tw68_ctrl_ops, + V4L2_CID_SATURATION, 0, 255, 1, 128); + /* NTSC only */ + v4l2_ctrl_new_std(hdl, &tw68_ctrl_ops, + V4L2_CID_HUE, -128, 127, 1, 0); + v4l2_ctrl_new_std(hdl, &tw68_ctrl_ops, + V4L2_CID_COLOR_KILLER, 0, 1, 1, 0); + v4l2_ctrl_new_std(hdl, &tw68_ctrl_ops, + V4L2_CID_CHROMA_AGC, 0, 1, 1, 1); + if (hdl->error) { + v4l2_ctrl_handler_free(hdl); + return hdl->error; + } + dev->v4l2_dev.ctrl_handler = hdl; + v4l2_ctrl_handler_setup(hdl); + return 0; +} + +int tw68_video_init2(struct tw68_dev *dev, int video_nr) +{ + int ret; + + set_tvnorm(dev, &tvnorms[0]); + + dev->fmt = format_by_fourcc(V4L2_PIX_FMT_BGR24); + dev->width = 720; + dev->height = 576; + dev->field = V4L2_FIELD_INTERLACED; + + INIT_LIST_HEAD(&dev->active); + dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + dev->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ | VB2_DMABUF; + dev->vidq.ops = &tw68_video_qops; + dev->vidq.mem_ops = &vb2_dma_sg_memops; + dev->vidq.drv_priv = dev; + dev->vidq.gfp_flags = __GFP_DMA32; + dev->vidq.buf_struct_size = sizeof(struct tw68_buf); + dev->vidq.lock = &dev->lock; + dev->vidq.min_buffers_needed = 2; + ret = vb2_queue_init(&dev->vidq); + if (ret) + return ret; + dev->vdev = tw68_video_template; + dev->vdev.v4l2_dev = &dev->v4l2_dev; + dev->vdev.lock = &dev->lock; + dev->vdev.queue = &dev->vidq; + video_set_drvdata(&dev->vdev, dev); + return video_register_device(&dev->vdev, VFL_TYPE_GRABBER, video_nr); +} + +/* + * tw68_irq_video_done + */ +void tw68_irq_video_done(struct tw68_dev *dev, unsigned long status) +{ + __u32 reg; + + /* reset interrupts handled by this routine */ + tw_writel(TW68_INTSTAT, status); + /* + * Check most likely first + * + * DMAPI shows we have reached the end of the risc code + * for the current buffer. + */ + if (status & TW68_DMAPI) { + struct tw68_buf *buf; + + spin_lock(&dev->slock); + buf = list_entry(dev->active.next, struct tw68_buf, list); + list_del(&buf->list); + spin_unlock(&dev->slock); + v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp); + buf->vb.v4l2_buf.field = dev->field; + buf->vb.v4l2_buf.sequence = dev->seqnr++; + vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE); + status &= ~(TW68_DMAPI); + if (0 == status) + return; + } + if (status & (TW68_VLOCK | TW68_HLOCK)) + dev_dbg(&dev->pci->dev, "Lost sync\n"); + if (status & TW68_PABORT) + dev_err(&dev->pci->dev, "PABORT interrupt\n"); + if (status & TW68_DMAPERR) + dev_err(&dev->pci->dev, "DMAPERR interrupt\n"); + /* + * On TW6800, FDMIS is apparently generated if video input is switched + * during operation. Therefore, it is not enabled for that chip. + */ + if (status & TW68_FDMIS) + dev_dbg(&dev->pci->dev, "FDMIS interrupt\n"); + if (status & TW68_FFOF) { + /* probably a logic error */ + reg = tw_readl(TW68_DMAC) & TW68_FIFO_EN; + tw_clearl(TW68_DMAC, TW68_FIFO_EN); + dev_dbg(&dev->pci->dev, "FFOF interrupt\n"); + tw_setl(TW68_DMAC, reg); + } + if (status & TW68_FFERR) + dev_dbg(&dev->pci->dev, "FFERR interrupt\n"); +} |