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linuxdebug/drivers/media/pci/tw686x/tw686x-video.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar
*
* Based on original driver by Krzysztof Ha?asa:
* Copyright (C) 2015 Industrial Research Institute for Automation
* and Measurements PIAP
*/
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <media/v4l2-common.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-dma-contig.h>
#include <media/videobuf2-dma-sg.h>
#include <media/videobuf2-vmalloc.h>
#include "tw686x.h"
#include "tw686x-regs.h"
#define TW686X_INPUTS_PER_CH 4
#define TW686X_VIDEO_WIDTH 720
#define TW686X_VIDEO_HEIGHT(id) ((id & V4L2_STD_525_60) ? 480 : 576)
#define TW686X_MAX_FPS(id) ((id & V4L2_STD_525_60) ? 30 : 25)
#define TW686X_MAX_SG_ENTRY_SIZE 4096
#define TW686X_MAX_SG_DESC_COUNT 256 /* PAL 720x576 needs 203 4-KB pages */
#define TW686X_SG_TABLE_SIZE (TW686X_MAX_SG_DESC_COUNT * sizeof(struct tw686x_sg_desc))
static const struct tw686x_format formats[] = {
{
.fourcc = V4L2_PIX_FMT_UYVY,
.mode = 0,
.depth = 16,
}, {
.fourcc = V4L2_PIX_FMT_RGB565,
.mode = 5,
.depth = 16,
}, {
.fourcc = V4L2_PIX_FMT_YUYV,
.mode = 6,
.depth = 16,
}
};
static void tw686x_buf_done(struct tw686x_video_channel *vc,
unsigned int pb)
{
struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
struct tw686x_dev *dev = vc->dev;
struct vb2_v4l2_buffer *vb;
struct vb2_buffer *vb2_buf;
if (vc->curr_bufs[pb]) {
vb = &vc->curr_bufs[pb]->vb;
vb->field = dev->dma_ops->field;
vb->sequence = vc->sequence++;
vb2_buf = &vb->vb2_buf;
if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY)
memcpy(vb2_plane_vaddr(vb2_buf, 0), desc->virt,
desc->size);
vb2_buf->timestamp = ktime_get_ns();
vb2_buffer_done(vb2_buf, VB2_BUF_STATE_DONE);
}
vc->pb = !pb;
}
/*
* We can call this even when alloc_dma failed for the given channel
*/
static void tw686x_memcpy_dma_free(struct tw686x_video_channel *vc,
unsigned int pb)
{
struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
struct tw686x_dev *dev = vc->dev;
struct pci_dev *pci_dev;
unsigned long flags;
/* Check device presence. Shouldn't really happen! */
spin_lock_irqsave(&dev->lock, flags);
pci_dev = dev->pci_dev;
spin_unlock_irqrestore(&dev->lock, flags);
if (!pci_dev) {
WARN(1, "trying to deallocate on missing device\n");
return;
}
if (desc->virt) {
dma_free_coherent(&dev->pci_dev->dev, desc->size, desc->virt,
desc->phys);
desc->virt = NULL;
}
}
static int tw686x_memcpy_dma_alloc(struct tw686x_video_channel *vc,
unsigned int pb)
{
struct tw686x_dev *dev = vc->dev;
u32 reg = pb ? VDMA_B_ADDR[vc->ch] : VDMA_P_ADDR[vc->ch];
unsigned int len;
void *virt;
WARN(vc->dma_descs[pb].virt,
"Allocating buffer but previous still here\n");
len = (vc->width * vc->height * vc->format->depth) >> 3;
virt = dma_alloc_coherent(&dev->pci_dev->dev, len,
&vc->dma_descs[pb].phys, GFP_KERNEL);
if (!virt) {
v4l2_err(&dev->v4l2_dev,
"dma%d: unable to allocate %s-buffer\n",
vc->ch, pb ? "B" : "P");
return -ENOMEM;
}
vc->dma_descs[pb].size = len;
vc->dma_descs[pb].virt = virt;
reg_write(dev, reg, vc->dma_descs[pb].phys);
return 0;
}
static void tw686x_memcpy_buf_refill(struct tw686x_video_channel *vc,
unsigned int pb)
{
struct tw686x_v4l2_buf *buf;
while (!list_empty(&vc->vidq_queued)) {
buf = list_first_entry(&vc->vidq_queued,
struct tw686x_v4l2_buf, list);
list_del(&buf->list);
vc->curr_bufs[pb] = buf;
return;
}
vc->curr_bufs[pb] = NULL;
}
static const struct tw686x_dma_ops memcpy_dma_ops = {
.alloc = tw686x_memcpy_dma_alloc,
.free = tw686x_memcpy_dma_free,
.buf_refill = tw686x_memcpy_buf_refill,
.mem_ops = &vb2_vmalloc_memops,
.hw_dma_mode = TW686X_FRAME_MODE,
.field = V4L2_FIELD_INTERLACED,
};
static void tw686x_contig_buf_refill(struct tw686x_video_channel *vc,
unsigned int pb)
{
struct tw686x_v4l2_buf *buf;
while (!list_empty(&vc->vidq_queued)) {
u32 reg = pb ? VDMA_B_ADDR[vc->ch] : VDMA_P_ADDR[vc->ch];
dma_addr_t phys;
buf = list_first_entry(&vc->vidq_queued,
struct tw686x_v4l2_buf, list);
list_del(&buf->list);
phys = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
reg_write(vc->dev, reg, phys);
buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
vc->curr_bufs[pb] = buf;
return;
}
vc->curr_bufs[pb] = NULL;
}
static const struct tw686x_dma_ops contig_dma_ops = {
.buf_refill = tw686x_contig_buf_refill,
.mem_ops = &vb2_dma_contig_memops,
.hw_dma_mode = TW686X_FRAME_MODE,
.field = V4L2_FIELD_INTERLACED,
};
static int tw686x_sg_desc_fill(struct tw686x_sg_desc *descs,
struct tw686x_v4l2_buf *buf,
unsigned int buf_len)
{
struct sg_table *vbuf = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
unsigned int len, entry_len;
struct scatterlist *sg;
int i, count;
/* Clear the scatter-gather table */
memset(descs, 0, TW686X_SG_TABLE_SIZE);
count = 0;
for_each_sg(vbuf->sgl, sg, vbuf->nents, i) {
dma_addr_t phys = sg_dma_address(sg);
len = sg_dma_len(sg);
while (len && buf_len) {
if (count == TW686X_MAX_SG_DESC_COUNT)
return -ENOMEM;
entry_len = min_t(unsigned int, len,
TW686X_MAX_SG_ENTRY_SIZE);
entry_len = min_t(unsigned int, entry_len, buf_len);
descs[count].phys = cpu_to_le32(phys);
descs[count++].flags_length =
cpu_to_le32(BIT(30) | entry_len);
phys += entry_len;
len -= entry_len;
buf_len -= entry_len;
}
if (!buf_len)
return 0;
}
return -ENOMEM;
}
static void tw686x_sg_buf_refill(struct tw686x_video_channel *vc,
unsigned int pb)
{
struct tw686x_dev *dev = vc->dev;
struct tw686x_v4l2_buf *buf;
while (!list_empty(&vc->vidq_queued)) {
unsigned int buf_len;
buf = list_first_entry(&vc->vidq_queued,
struct tw686x_v4l2_buf, list);
list_del(&buf->list);
buf_len = (vc->width * vc->height * vc->format->depth) >> 3;
if (tw686x_sg_desc_fill(vc->sg_descs[pb], buf, buf_len)) {
v4l2_err(&dev->v4l2_dev,
"dma%d: unable to fill %s-buffer\n",
vc->ch, pb ? "B" : "P");
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
continue;
}
buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
vc->curr_bufs[pb] = buf;
return;
}
vc->curr_bufs[pb] = NULL;
}
static void tw686x_sg_dma_free(struct tw686x_video_channel *vc,
unsigned int pb)
{
struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
struct tw686x_dev *dev = vc->dev;
if (desc->size) {
dma_free_coherent(&dev->pci_dev->dev, desc->size, desc->virt,
desc->phys);
desc->virt = NULL;
}
vc->sg_descs[pb] = NULL;
}
static int tw686x_sg_dma_alloc(struct tw686x_video_channel *vc,
unsigned int pb)
{
struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
struct tw686x_dev *dev = vc->dev;
u32 reg = pb ? DMA_PAGE_TABLE1_ADDR[vc->ch] :
DMA_PAGE_TABLE0_ADDR[vc->ch];
void *virt;
if (desc->size) {
virt = dma_alloc_coherent(&dev->pci_dev->dev, desc->size,
&desc->phys, GFP_KERNEL);
if (!virt) {
v4l2_err(&dev->v4l2_dev,
"dma%d: unable to allocate %s-buffer\n",
vc->ch, pb ? "B" : "P");
return -ENOMEM;
}
desc->virt = virt;
reg_write(dev, reg, desc->phys);
} else {
virt = dev->video_channels[0].dma_descs[pb].virt +
vc->ch * TW686X_SG_TABLE_SIZE;
}
vc->sg_descs[pb] = virt;
return 0;
}
static int tw686x_sg_setup(struct tw686x_dev *dev)
{
unsigned int sg_table_size, pb, ch, channels;
if (is_second_gen(dev)) {
/*
* TW6865/TW6869: each channel needs a pair of
* P-B descriptor tables.
*/
channels = max_channels(dev);
sg_table_size = TW686X_SG_TABLE_SIZE;
} else {
/*
* TW6864/TW6868: we need to allocate a pair of
* P-B descriptor tables, common for all channels.
* Each table will be bigger than 4 KB.
*/
channels = 1;
sg_table_size = max_channels(dev) * TW686X_SG_TABLE_SIZE;
}
for (ch = 0; ch < channels; ch++) {
struct tw686x_video_channel *vc = &dev->video_channels[ch];
for (pb = 0; pb < 2; pb++)
vc->dma_descs[pb].size = sg_table_size;
}
return 0;
}
static const struct tw686x_dma_ops sg_dma_ops = {
.setup = tw686x_sg_setup,
.alloc = tw686x_sg_dma_alloc,
.free = tw686x_sg_dma_free,
.buf_refill = tw686x_sg_buf_refill,
.mem_ops = &vb2_dma_sg_memops,
.hw_dma_mode = TW686X_SG_MODE,
.field = V4L2_FIELD_SEQ_TB,
};
static const unsigned int fps_map[15] = {
/*
* bit 31 enables selecting the field control register
* bits 0-29 are a bitmask with fields that will be output.
* For NTSC (and PAL-M, PAL-60), all 30 bits are used.
* For other PAL standards, only the first 25 bits are used.
*/
0x00000000, /* output all fields */
0x80000006, /* 2 fps (60Hz), 2 fps (50Hz) */
0x80018006, /* 4 fps (60Hz), 4 fps (50Hz) */
0x80618006, /* 6 fps (60Hz), 6 fps (50Hz) */
0x81818186, /* 8 fps (60Hz), 8 fps (50Hz) */
0x86186186, /* 10 fps (60Hz), 8 fps (50Hz) */
0x86619866, /* 12 fps (60Hz), 10 fps (50Hz) */
0x86666666, /* 14 fps (60Hz), 12 fps (50Hz) */
0x9999999e, /* 16 fps (60Hz), 14 fps (50Hz) */
0x99e6799e, /* 18 fps (60Hz), 16 fps (50Hz) */
0x9e79e79e, /* 20 fps (60Hz), 16 fps (50Hz) */
0x9e7e7e7e, /* 22 fps (60Hz), 18 fps (50Hz) */
0x9fe7f9fe, /* 24 fps (60Hz), 20 fps (50Hz) */
0x9ffe7ffe, /* 26 fps (60Hz), 22 fps (50Hz) */
0x9ffffffe, /* 28 fps (60Hz), 24 fps (50Hz) */
};
static unsigned int tw686x_real_fps(unsigned int index, unsigned int max_fps)
{
unsigned long mask;
if (!index || index >= ARRAY_SIZE(fps_map))
return max_fps;
mask = GENMASK(max_fps - 1, 0);
return hweight_long(fps_map[index] & mask);
}
static unsigned int tw686x_fps_idx(unsigned int fps, unsigned int max_fps)
{
unsigned int idx, real_fps;
int delta;
/* First guess */
idx = (12 + 15 * fps) / max_fps;
/* Minimal possible framerate is 2 frames per second */
if (!idx)
return 1;
/* Check if the difference is bigger than abs(1) and adjust */
real_fps = tw686x_real_fps(idx, max_fps);
delta = real_fps - fps;
if (delta < -1)
idx++;
else if (delta > 1)
idx--;
/* Max framerate */
if (idx >= 15)
return 0;
return idx;
}
static void tw686x_set_framerate(struct tw686x_video_channel *vc,
unsigned int fps)
{
unsigned int i;
i = tw686x_fps_idx(fps, TW686X_MAX_FPS(vc->video_standard));
reg_write(vc->dev, VIDEO_FIELD_CTRL[vc->ch], fps_map[i]);
vc->fps = tw686x_real_fps(i, TW686X_MAX_FPS(vc->video_standard));
}
static const struct tw686x_format *format_by_fourcc(unsigned int fourcc)
{
unsigned int cnt;
for (cnt = 0; cnt < ARRAY_SIZE(formats); cnt++)
if (formats[cnt].fourcc == fourcc)
return &formats[cnt];
return NULL;
}
static int tw686x_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
unsigned int szimage =
(vc->width * vc->height * vc->format->depth) >> 3;
/*
* Let's request at least three buffers: two for the
* DMA engine and one for userspace.
*/
if (vq->num_buffers + *nbuffers < 3)
*nbuffers = 3 - vq->num_buffers;
if (*nplanes) {
if (*nplanes != 1 || sizes[0] < szimage)
return -EINVAL;
return 0;
}
sizes[0] = szimage;
*nplanes = 1;
return 0;
}
static void tw686x_buf_queue(struct vb2_buffer *vb)
{
struct tw686x_video_channel *vc = vb2_get_drv_priv(vb->vb2_queue);
struct tw686x_dev *dev = vc->dev;
struct pci_dev *pci_dev;
unsigned long flags;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct tw686x_v4l2_buf *buf =
container_of(vbuf, struct tw686x_v4l2_buf, vb);
/* Check device presence */
spin_lock_irqsave(&dev->lock, flags);
pci_dev = dev->pci_dev;
spin_unlock_irqrestore(&dev->lock, flags);
if (!pci_dev) {
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
return;
}
spin_lock_irqsave(&vc->qlock, flags);
list_add_tail(&buf->list, &vc->vidq_queued);
spin_unlock_irqrestore(&vc->qlock, flags);
}
static void tw686x_clear_queue(struct tw686x_video_channel *vc,
enum vb2_buffer_state state)
{
unsigned int pb;
while (!list_empty(&vc->vidq_queued)) {
struct tw686x_v4l2_buf *buf;
buf = list_first_entry(&vc->vidq_queued,
struct tw686x_v4l2_buf, list);
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf, state);
}
for (pb = 0; pb < 2; pb++) {
if (vc->curr_bufs[pb])
vb2_buffer_done(&vc->curr_bufs[pb]->vb.vb2_buf, state);
vc->curr_bufs[pb] = NULL;
}
}
static int tw686x_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
struct tw686x_dev *dev = vc->dev;
struct pci_dev *pci_dev;
unsigned long flags;
int pb, err;
/* Check device presence */
spin_lock_irqsave(&dev->lock, flags);
pci_dev = dev->pci_dev;
spin_unlock_irqrestore(&dev->lock, flags);
if (!pci_dev) {
err = -ENODEV;
goto err_clear_queue;
}
spin_lock_irqsave(&vc->qlock, flags);
/* Sanity check */
if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY &&
(!vc->dma_descs[0].virt || !vc->dma_descs[1].virt)) {
spin_unlock_irqrestore(&vc->qlock, flags);
v4l2_err(&dev->v4l2_dev,
"video%d: refusing to start without DMA buffers\n",
vc->num);
err = -ENOMEM;
goto err_clear_queue;
}
for (pb = 0; pb < 2; pb++)
dev->dma_ops->buf_refill(vc, pb);
spin_unlock_irqrestore(&vc->qlock, flags);
vc->sequence = 0;
vc->pb = 0;
spin_lock_irqsave(&dev->lock, flags);
tw686x_enable_channel(dev, vc->ch);
spin_unlock_irqrestore(&dev->lock, flags);
mod_timer(&dev->dma_delay_timer, jiffies + msecs_to_jiffies(100));
return 0;
err_clear_queue:
spin_lock_irqsave(&vc->qlock, flags);
tw686x_clear_queue(vc, VB2_BUF_STATE_QUEUED);
spin_unlock_irqrestore(&vc->qlock, flags);
return err;
}
static void tw686x_stop_streaming(struct vb2_queue *vq)
{
struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
struct tw686x_dev *dev = vc->dev;
struct pci_dev *pci_dev;
unsigned long flags;
/* Check device presence */
spin_lock_irqsave(&dev->lock, flags);
pci_dev = dev->pci_dev;
spin_unlock_irqrestore(&dev->lock, flags);
if (pci_dev)
tw686x_disable_channel(dev, vc->ch);
spin_lock_irqsave(&vc->qlock, flags);
tw686x_clear_queue(vc, VB2_BUF_STATE_ERROR);
spin_unlock_irqrestore(&vc->qlock, flags);
}
static int tw686x_buf_prepare(struct vb2_buffer *vb)
{
struct tw686x_video_channel *vc = vb2_get_drv_priv(vb->vb2_queue);
unsigned int size =
(vc->width * vc->height * vc->format->depth) >> 3;
if (vb2_plane_size(vb, 0) < size)
return -EINVAL;
vb2_set_plane_payload(vb, 0, size);
return 0;
}
static const struct vb2_ops tw686x_video_qops = {
.queue_setup = tw686x_queue_setup,
.buf_queue = tw686x_buf_queue,
.buf_prepare = tw686x_buf_prepare,
.start_streaming = tw686x_start_streaming,
.stop_streaming = tw686x_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static int tw686x_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct tw686x_video_channel *vc;
struct tw686x_dev *dev;
unsigned int ch;
vc = container_of(ctrl->handler, struct tw686x_video_channel,
ctrl_handler);
dev = vc->dev;
ch = vc->ch;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
reg_write(dev, BRIGHT[ch], ctrl->val & 0xff);
return 0;
case V4L2_CID_CONTRAST:
reg_write(dev, CONTRAST[ch], ctrl->val);
return 0;
case V4L2_CID_SATURATION:
reg_write(dev, SAT_U[ch], ctrl->val);
reg_write(dev, SAT_V[ch], ctrl->val);
return 0;
case V4L2_CID_HUE:
reg_write(dev, HUE[ch], ctrl->val & 0xff);
return 0;
}
return -EINVAL;
}
static const struct v4l2_ctrl_ops ctrl_ops = {
.s_ctrl = tw686x_s_ctrl,
};
static int tw686x_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct tw686x_dev *dev = vc->dev;
f->fmt.pix.width = vc->width;
f->fmt.pix.height = vc->height;
f->fmt.pix.field = dev->dma_ops->field;
f->fmt.pix.pixelformat = vc->format->fourcc;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
f->fmt.pix.bytesperline = (f->fmt.pix.width * vc->format->depth) / 8;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
return 0;
}
static int tw686x_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct tw686x_dev *dev = vc->dev;
unsigned int video_height = TW686X_VIDEO_HEIGHT(vc->video_standard);
const struct tw686x_format *format;
format = format_by_fourcc(f->fmt.pix.pixelformat);
if (!format) {
format = &formats[0];
f->fmt.pix.pixelformat = format->fourcc;
}
if (f->fmt.pix.width <= TW686X_VIDEO_WIDTH / 2)
f->fmt.pix.width = TW686X_VIDEO_WIDTH / 2;
else
f->fmt.pix.width = TW686X_VIDEO_WIDTH;
if (f->fmt.pix.height <= video_height / 2)
f->fmt.pix.height = video_height / 2;
else
f->fmt.pix.height = video_height;
f->fmt.pix.bytesperline = (f->fmt.pix.width * format->depth) / 8;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
f->fmt.pix.field = dev->dma_ops->field;
return 0;
}
static int tw686x_set_format(struct tw686x_video_channel *vc,
unsigned int pixelformat, unsigned int width,
unsigned int height, bool realloc)
{
struct tw686x_dev *dev = vc->dev;
u32 val, dma_width, dma_height, dma_line_width;
int err, pb;
vc->format = format_by_fourcc(pixelformat);
vc->width = width;
vc->height = height;
/* We need new DMA buffers if the framesize has changed */
if (dev->dma_ops->alloc && realloc) {
for (pb = 0; pb < 2; pb++)
dev->dma_ops->free(vc, pb);
for (pb = 0; pb < 2; pb++) {
err = dev->dma_ops->alloc(vc, pb);
if (err) {
if (pb > 0)
dev->dma_ops->free(vc, 0);
return err;
}
}
}
val = reg_read(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch]);
if (vc->width <= TW686X_VIDEO_WIDTH / 2)
val |= BIT(23);
else
val &= ~BIT(23);
if (vc->height <= TW686X_VIDEO_HEIGHT(vc->video_standard) / 2)
val |= BIT(24);
else
val &= ~BIT(24);
val &= ~0x7ffff;
/* Program the DMA scatter-gather */
if (dev->dma_mode == TW686X_DMA_MODE_SG) {
u32 start_idx, end_idx;
start_idx = is_second_gen(dev) ?
0 : vc->ch * TW686X_MAX_SG_DESC_COUNT;
end_idx = start_idx + TW686X_MAX_SG_DESC_COUNT - 1;
val |= (end_idx << 10) | start_idx;
}
val &= ~(0x7 << 20);
val |= vc->format->mode << 20;
reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val);
/* Program the DMA frame size */
dma_width = (vc->width * 2) & 0x7ff;
dma_height = vc->height / 2;
dma_line_width = (vc->width * 2) & 0x7ff;
val = (dma_height << 22) | (dma_line_width << 11) | dma_width;
reg_write(vc->dev, VDMA_WHP[vc->ch], val);
return 0;
}
static int tw686x_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct tw686x_video_channel *vc = video_drvdata(file);
unsigned long area;
bool realloc;
int err;
if (vb2_is_busy(&vc->vidq))
return -EBUSY;
area = vc->width * vc->height;
err = tw686x_try_fmt_vid_cap(file, priv, f);
if (err)
return err;
realloc = area != (f->fmt.pix.width * f->fmt.pix.height);
return tw686x_set_format(vc, f->fmt.pix.pixelformat,
f->fmt.pix.width, f->fmt.pix.height,
realloc);
}
static int tw686x_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct tw686x_dev *dev = vc->dev;
strscpy(cap->driver, "tw686x", sizeof(cap->driver));
strscpy(cap->card, dev->name, sizeof(cap->card));
return 0;
}
static int tw686x_set_standard(struct tw686x_video_channel *vc, v4l2_std_id id)
{
u32 val;
if (id & V4L2_STD_NTSC)
val = 0;
else if (id & V4L2_STD_PAL)
val = 1;
else if (id & V4L2_STD_SECAM)
val = 2;
else if (id & V4L2_STD_NTSC_443)
val = 3;
else if (id & V4L2_STD_PAL_M)
val = 4;
else if (id & V4L2_STD_PAL_Nc)
val = 5;
else if (id & V4L2_STD_PAL_60)
val = 6;
else
return -EINVAL;
vc->video_standard = id;
reg_write(vc->dev, SDT[vc->ch], val);
val = reg_read(vc->dev, VIDEO_CONTROL1);
if (id & V4L2_STD_525_60)
val &= ~(1 << (SYS_MODE_DMA_SHIFT + vc->ch));
else
val |= (1 << (SYS_MODE_DMA_SHIFT + vc->ch));
reg_write(vc->dev, VIDEO_CONTROL1, val);
return 0;
}
static int tw686x_s_std(struct file *file, void *priv, v4l2_std_id id)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct v4l2_format f;
int ret;
if (vc->video_standard == id)
return 0;
if (vb2_is_busy(&vc->vidq))
return -EBUSY;
ret = tw686x_set_standard(vc, id);
if (ret)
return ret;
/*
* Adjust format after V4L2_STD_525_60/V4L2_STD_625_50 change,
* calling g_fmt and s_fmt will sanitize the height
* according to the standard.
*/
tw686x_g_fmt_vid_cap(file, priv, &f);
tw686x_s_fmt_vid_cap(file, priv, &f);
/*
* Frame decimation depends on the chosen standard,
* so reset it to the current value.
*/
tw686x_set_framerate(vc, vc->fps);
return 0;
}
static int tw686x_querystd(struct file *file, void *priv, v4l2_std_id *std)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct tw686x_dev *dev = vc->dev;
unsigned int old_std, detected_std = 0;
unsigned long end;
if (vb2_is_streaming(&vc->vidq))
return -EBUSY;
/* Enable and start standard detection */
old_std = reg_read(dev, SDT[vc->ch]);
reg_write(dev, SDT[vc->ch], 0x7);
reg_write(dev, SDT_EN[vc->ch], 0xff);
end = jiffies + msecs_to_jiffies(500);
while (time_is_after_jiffies(end)) {
detected_std = reg_read(dev, SDT[vc->ch]);
if (!(detected_std & BIT(7)))
break;
msleep(100);
}
reg_write(dev, SDT[vc->ch], old_std);
/* Exit if still busy */
if (detected_std & BIT(7))
return 0;
detected_std = (detected_std >> 4) & 0x7;
switch (detected_std) {
case TW686X_STD_NTSC_M:
*std &= V4L2_STD_NTSC;
break;
case TW686X_STD_NTSC_443:
*std &= V4L2_STD_NTSC_443;
break;
case TW686X_STD_PAL_M:
*std &= V4L2_STD_PAL_M;
break;
case TW686X_STD_PAL_60:
*std &= V4L2_STD_PAL_60;
break;
case TW686X_STD_PAL:
*std &= V4L2_STD_PAL;
break;
case TW686X_STD_PAL_CN:
*std &= V4L2_STD_PAL_Nc;
break;
case TW686X_STD_SECAM:
*std &= V4L2_STD_SECAM;
break;
default:
*std = 0;
}
return 0;
}
static int tw686x_g_std(struct file *file, void *priv, v4l2_std_id *id)
{
struct tw686x_video_channel *vc = video_drvdata(file);
*id = vc->video_standard;
return 0;
}
static int tw686x_enum_framesizes(struct file *file, void *priv,
struct v4l2_frmsizeenum *fsize)
{
struct tw686x_video_channel *vc = video_drvdata(file);
if (fsize->index)
return -EINVAL;
fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
fsize->stepwise.max_width = TW686X_VIDEO_WIDTH;
fsize->stepwise.min_width = fsize->stepwise.max_width / 2;
fsize->stepwise.step_width = fsize->stepwise.min_width;
fsize->stepwise.max_height = TW686X_VIDEO_HEIGHT(vc->video_standard);
fsize->stepwise.min_height = fsize->stepwise.max_height / 2;
fsize->stepwise.step_height = fsize->stepwise.min_height;
return 0;
}
static int tw686x_enum_frameintervals(struct file *file, void *priv,
struct v4l2_frmivalenum *ival)
{
struct tw686x_video_channel *vc = video_drvdata(file);
int max_fps = TW686X_MAX_FPS(vc->video_standard);
int max_rates = DIV_ROUND_UP(max_fps, 2);
if (ival->index >= max_rates)
return -EINVAL;
ival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
ival->discrete.numerator = 1;
if (ival->index < (max_rates - 1))
ival->discrete.denominator = (ival->index + 1) * 2;
else
ival->discrete.denominator = max_fps;
return 0;
}
static int tw686x_g_parm(struct file *file, void *priv,
struct v4l2_streamparm *sp)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct v4l2_captureparm *cp = &sp->parm.capture;
if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
sp->parm.capture.readbuffers = 3;
cp->capability = V4L2_CAP_TIMEPERFRAME;
cp->timeperframe.numerator = 1;
cp->timeperframe.denominator = vc->fps;
return 0;
}
static int tw686x_s_parm(struct file *file, void *priv,
struct v4l2_streamparm *sp)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct v4l2_captureparm *cp = &sp->parm.capture;
unsigned int denominator = cp->timeperframe.denominator;
unsigned int numerator = cp->timeperframe.numerator;
unsigned int fps;
if (vb2_is_busy(&vc->vidq))
return -EBUSY;
fps = (!numerator || !denominator) ? 0 : denominator / numerator;
if (vc->fps != fps)
tw686x_set_framerate(vc, fps);
return tw686x_g_parm(file, priv, sp);
}
static int tw686x_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (f->index >= ARRAY_SIZE(formats))
return -EINVAL;
f->pixelformat = formats[f->index].fourcc;
return 0;
}
static void tw686x_set_input(struct tw686x_video_channel *vc, unsigned int i)
{
u32 val;
vc->input = i;
val = reg_read(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch]);
val &= ~(0x3 << 30);
val |= i << 30;
reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val);
}
static int tw686x_s_input(struct file *file, void *priv, unsigned int i)
{
struct tw686x_video_channel *vc = video_drvdata(file);
if (i >= TW686X_INPUTS_PER_CH)
return -EINVAL;
if (i == vc->input)
return 0;
/*
* Not sure we are able to support on the fly input change
*/
if (vb2_is_busy(&vc->vidq))
return -EBUSY;
tw686x_set_input(vc, i);
return 0;
}
static int tw686x_g_input(struct file *file, void *priv, unsigned int *i)
{
struct tw686x_video_channel *vc = video_drvdata(file);
*i = vc->input;
return 0;
}
static int tw686x_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
struct tw686x_video_channel *vc = video_drvdata(file);
unsigned int vidstat;
if (i->index >= TW686X_INPUTS_PER_CH)
return -EINVAL;
snprintf(i->name, sizeof(i->name), "Composite%d", i->index);
i->type = V4L2_INPUT_TYPE_CAMERA;
i->std = vc->device->tvnorms;
i->capabilities = V4L2_IN_CAP_STD;
vidstat = reg_read(vc->dev, VIDSTAT[vc->ch]);
i->status = 0;
if (vidstat & TW686X_VIDSTAT_VDLOSS)
i->status |= V4L2_IN_ST_NO_SIGNAL;
if (!(vidstat & TW686X_VIDSTAT_HLOCK))
i->status |= V4L2_IN_ST_NO_H_LOCK;
return 0;
}
static const struct v4l2_file_operations tw686x_video_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.unlocked_ioctl = video_ioctl2,
.release = vb2_fop_release,
.poll = vb2_fop_poll,
.read = vb2_fop_read,
.mmap = vb2_fop_mmap,
};
static const struct v4l2_ioctl_ops tw686x_video_ioctl_ops = {
.vidioc_querycap = tw686x_querycap,
.vidioc_g_fmt_vid_cap = tw686x_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = tw686x_s_fmt_vid_cap,
.vidioc_enum_fmt_vid_cap = tw686x_enum_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = tw686x_try_fmt_vid_cap,
.vidioc_querystd = tw686x_querystd,
.vidioc_g_std = tw686x_g_std,
.vidioc_s_std = tw686x_s_std,
.vidioc_g_parm = tw686x_g_parm,
.vidioc_s_parm = tw686x_s_parm,
.vidioc_enum_framesizes = tw686x_enum_framesizes,
.vidioc_enum_frameintervals = tw686x_enum_frameintervals,
.vidioc_enum_input = tw686x_enum_input,
.vidioc_g_input = tw686x_g_input,
.vidioc_s_input = tw686x_s_input,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests,
unsigned int pb_status, unsigned int fifo_status,
unsigned int *reset_ch)
{
struct tw686x_video_channel *vc;
unsigned long flags;
unsigned int ch, pb;
for_each_set_bit(ch, &requests, max_channels(dev)) {
vc = &dev->video_channels[ch];
/*
* This can either be a blue frame (with signal-lost bit set)
* or a good frame (with signal-lost bit clear). If we have just
* got signal, then this channel needs resetting.
*/
if (vc->no_signal && !(fifo_status & BIT(ch))) {
v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
"video%d: signal recovered\n", vc->num);
vc->no_signal = false;
*reset_ch |= BIT(ch);
vc->pb = 0;
continue;
}
vc->no_signal = !!(fifo_status & BIT(ch));
/* Check FIFO errors only if there's signal */
if (!vc->no_signal) {
u32 fifo_ov, fifo_bad;
fifo_ov = (fifo_status >> 24) & BIT(ch);
fifo_bad = (fifo_status >> 16) & BIT(ch);
if (fifo_ov || fifo_bad) {
/* Mark this channel for reset */
v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
"video%d: FIFO error\n", vc->num);
*reset_ch |= BIT(ch);
vc->pb = 0;
continue;
}
}
pb = !!(pb_status & BIT(ch));
if (vc->pb != pb) {
/* Mark this channel for reset */
v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
"video%d: unexpected p-b buffer!\n",
vc->num);
*reset_ch |= BIT(ch);
vc->pb = 0;
continue;
}
spin_lock_irqsave(&vc->qlock, flags);
tw686x_buf_done(vc, pb);
dev->dma_ops->buf_refill(vc, pb);
spin_unlock_irqrestore(&vc->qlock, flags);
}
}
void tw686x_video_free(struct tw686x_dev *dev)
{
unsigned int ch, pb;
for (ch = 0; ch < max_channels(dev); ch++) {
struct tw686x_video_channel *vc = &dev->video_channels[ch];
video_unregister_device(vc->device);
if (dev->dma_ops->free)
for (pb = 0; pb < 2; pb++)
dev->dma_ops->free(vc, pb);
}
}
int tw686x_video_init(struct tw686x_dev *dev)
{
unsigned int ch, val;
int err;
if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY)
dev->dma_ops = &memcpy_dma_ops;
else if (dev->dma_mode == TW686X_DMA_MODE_CONTIG)
dev->dma_ops = &contig_dma_ops;
else if (dev->dma_mode == TW686X_DMA_MODE_SG)
dev->dma_ops = &sg_dma_ops;
else
return -EINVAL;
err = v4l2_device_register(&dev->pci_dev->dev, &dev->v4l2_dev);
if (err)
return err;
if (dev->dma_ops->setup) {
err = dev->dma_ops->setup(dev);
if (err)
return err;
}
/* Initialize vc->dev and vc->ch for the error path */
for (ch = 0; ch < max_channels(dev); ch++) {
struct tw686x_video_channel *vc = &dev->video_channels[ch];
vc->dev = dev;
vc->ch = ch;
}
for (ch = 0; ch < max_channels(dev); ch++) {
struct tw686x_video_channel *vc = &dev->video_channels[ch];
struct video_device *vdev;
mutex_init(&vc->vb_mutex);
spin_lock_init(&vc->qlock);
INIT_LIST_HEAD(&vc->vidq_queued);
/* default settings */
err = tw686x_set_standard(vc, V4L2_STD_NTSC);
if (err)
goto error;
err = tw686x_set_format(vc, formats[0].fourcc,
TW686X_VIDEO_WIDTH,
TW686X_VIDEO_HEIGHT(vc->video_standard),
true);
if (err)
goto error;
tw686x_set_input(vc, 0);
tw686x_set_framerate(vc, 30);
reg_write(dev, VDELAY_LO[ch], 0x14);
reg_write(dev, HACTIVE_LO[ch], 0xd0);
reg_write(dev, VIDEO_SIZE[ch], 0);
vc->vidq.io_modes = VB2_READ | VB2_MMAP | VB2_DMABUF;
vc->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vc->vidq.drv_priv = vc;
vc->vidq.buf_struct_size = sizeof(struct tw686x_v4l2_buf);
vc->vidq.ops = &tw686x_video_qops;
vc->vidq.mem_ops = dev->dma_ops->mem_ops;
vc->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vc->vidq.min_buffers_needed = 2;
vc->vidq.lock = &vc->vb_mutex;
vc->vidq.gfp_flags = dev->dma_mode != TW686X_DMA_MODE_MEMCPY ?
GFP_DMA32 : 0;
vc->vidq.dev = &dev->pci_dev->dev;
err = vb2_queue_init(&vc->vidq);
if (err) {
v4l2_err(&dev->v4l2_dev,
"dma%d: cannot init vb2 queue\n", ch);
goto error;
}
err = v4l2_ctrl_handler_init(&vc->ctrl_handler, 4);
if (err) {
v4l2_err(&dev->v4l2_dev,
"dma%d: cannot init ctrl handler\n", ch);
goto error;
}
v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
V4L2_CID_CONTRAST, 0, 255, 1, 100);
v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
V4L2_CID_SATURATION, 0, 255, 1, 128);
v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
V4L2_CID_HUE, -128, 127, 1, 0);
err = vc->ctrl_handler.error;
if (err)
goto error;
err = v4l2_ctrl_handler_setup(&vc->ctrl_handler);
if (err)
goto error;
vdev = video_device_alloc();
if (!vdev) {
v4l2_err(&dev->v4l2_dev,
"dma%d: unable to allocate device\n", ch);
err = -ENOMEM;
goto error;
}
snprintf(vdev->name, sizeof(vdev->name), "%s video", dev->name);
vdev->fops = &tw686x_video_fops;
vdev->ioctl_ops = &tw686x_video_ioctl_ops;
vdev->release = video_device_release;
vdev->v4l2_dev = &dev->v4l2_dev;
vdev->queue = &vc->vidq;
vdev->tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50;
vdev->minor = -1;
vdev->lock = &vc->vb_mutex;
vdev->ctrl_handler = &vc->ctrl_handler;
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
vc->device = vdev;
video_set_drvdata(vdev, vc);
err = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
if (err < 0) {
video_device_release(vdev);
goto error;
}
vc->num = vdev->num;
}
val = TW686X_DEF_PHASE_REF;
for (ch = 0; ch < max_channels(dev); ch++)
val |= dev->dma_ops->hw_dma_mode << (16 + ch * 2);
reg_write(dev, PHASE_REF, val);
reg_write(dev, MISC2[0], 0xe7);
reg_write(dev, VCTRL1[0], 0xcc);
reg_write(dev, LOOP[0], 0xa5);
if (max_channels(dev) > 4) {
reg_write(dev, VCTRL1[1], 0xcc);
reg_write(dev, LOOP[1], 0xa5);
reg_write(dev, MISC2[1], 0xe7);
}
return 0;
error:
tw686x_video_free(dev);
return err;
}