2 * Driver for the Conexant CX25821 PCIe bridge
4 * Copyright (C) 2009 Conexant Systems Inc.
5 * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
6 * Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "cx25821-video.h"
26 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
28 struct cx25821_buffer *buf =
29 container_of(vb, struct cx25821_buffer, vb);
30 struct cx25821_buffer *prev;
31 struct cx25821_fh *fh = vq->priv_data;
32 struct cx25821_dev *dev = fh->dev;
33 struct cx25821_dmaqueue *q = &dev->vidq[SRAM_CH07];
35 /* add jump to stopper */
36 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
37 buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
38 buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
40 dprintk(2, "jmp to stopper (0x%x)\n", buf->risc.jmp[1]);
41 if (!list_empty(&q->queued)) {
42 list_add_tail(&buf->vb.queue, &q->queued);
43 buf->vb.state = VIDEOBUF_QUEUED;
44 dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf,
47 } else if (list_empty(&q->active)) {
48 list_add_tail(&buf->vb.queue, &q->active);
49 cx25821_start_video_dma(dev, q, buf,
50 &dev->sram_channels[SRAM_CH07]);
51 buf->vb.state = VIDEOBUF_ACTIVE;
52 buf->count = q->count++;
53 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
55 "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
56 buf, buf->vb.i, buf->count, q->count);
59 list_entry(q->active.prev, struct cx25821_buffer, vb.queue);
60 if (prev->vb.width == buf->vb.width
61 && prev->vb.height == buf->vb.height
62 && prev->fmt == buf->fmt) {
63 list_add_tail(&buf->vb.queue, &q->active);
64 buf->vb.state = VIDEOBUF_ACTIVE;
65 buf->count = q->count++;
66 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
68 /* 64 bit bits 63-32 */
69 prev->risc.jmp[2] = cpu_to_le32(0);
71 "[%p/%d] buffer_queue - append to active, buf->count=%d\n",
72 buf, buf->vb.i, buf->count);
75 list_add_tail(&buf->vb.queue, &q->queued);
76 buf->vb.state = VIDEOBUF_QUEUED;
77 dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf,
82 if (list_empty(&q->active)) {
83 dprintk(2, "active queue empty!\n");
87 static struct videobuf_queue_ops cx25821_video_qops = {
88 .buf_setup = buffer_setup,
89 .buf_prepare = buffer_prepare,
90 .buf_queue = buffer_queue,
91 .buf_release = buffer_release,
94 static int video_open(struct file *file)
96 struct video_device *vdev = video_devdata(file);
97 struct cx25821_dev *dev = video_drvdata(file);
98 struct cx25821_fh *fh;
99 enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
102 printk("open dev=%s type=%s\n", video_device_node_name(vdev),
103 v4l2_type_names[type]);
105 /* allocate + initialize per filehandle data */
106 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
112 file->private_data = fh;
117 if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
122 dev->channel_opened = SRAM_CH07;
124 (dev->pixel_formats[dev->channel_opened] ==
125 PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
126 fh->fmt = format_by_fourcc(pix_format);
128 v4l2_prio_open(&dev->prio, &fh->prio);
130 videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
131 &dev->pci->dev, &dev->slock,
132 V4L2_BUF_TYPE_VIDEO_CAPTURE,
133 V4L2_FIELD_INTERLACED,
134 sizeof(struct cx25821_buffer), fh);
136 dprintk(1, "post videobuf_queue_init()\n");
142 static ssize_t video_read(struct file *file, char __user * data, size_t count,
145 struct cx25821_fh *fh = file->private_data;
148 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
149 if (res_locked(fh->dev, RESOURCE_VIDEO7))
152 return videobuf_read_one(&fh->vidq, data, count, ppos,
153 file->f_flags & O_NONBLOCK);
161 static unsigned int video_poll(struct file *file,
162 struct poll_table_struct *wait)
164 struct cx25821_fh *fh = file->private_data;
165 struct cx25821_buffer *buf;
167 if (res_check(fh, RESOURCE_VIDEO7)) {
168 /* streaming capture */
169 if (list_empty(&fh->vidq.stream))
171 buf = list_entry(fh->vidq.stream.next,
172 struct cx25821_buffer, vb.stream);
175 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
180 poll_wait(file, &buf->vb.done, wait);
181 if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR) {
182 if (buf->vb.state == VIDEOBUF_DONE) {
183 struct cx25821_dev *dev = fh->dev;
185 if (dev && dev->use_cif_resolution[SRAM_CH07]) {
186 u8 cam_id = *((char *)buf->vb.baddr + 3);
187 memcpy((char *)buf->vb.baddr,
188 (char *)buf->vb.baddr + (fh->width * 2),
190 *((char *)buf->vb.baddr + 3) = cam_id;
194 return POLLIN | POLLRDNORM;
200 static int video_release(struct file *file)
202 struct cx25821_fh *fh = file->private_data;
203 struct cx25821_dev *dev = fh->dev;
205 //stop the risc engine and fifo
206 cx_write(channel7->dma_ctl, 0); /* FIFO and RISC disable */
208 /* stop video capture */
209 if (res_check(fh, RESOURCE_VIDEO7)) {
210 videobuf_queue_cancel(&fh->vidq);
211 res_free(dev, fh, RESOURCE_VIDEO7);
214 if (fh->vidq.read_buf) {
215 buffer_release(&fh->vidq, fh->vidq.read_buf);
216 kfree(fh->vidq.read_buf);
219 videobuf_mmap_free(&fh->vidq);
221 v4l2_prio_close(&dev->prio, &fh->prio);
222 file->private_data = NULL;
228 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
230 struct cx25821_fh *fh = priv;
231 struct cx25821_dev *dev = fh->dev;
233 if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
237 if (unlikely(i != fh->type)) {
241 if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO7)))) {
245 return videobuf_streamon(get_queue(fh));
248 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
250 struct cx25821_fh *fh = priv;
251 struct cx25821_dev *dev = fh->dev;
254 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
259 res = get_resource(fh, RESOURCE_VIDEO7);
260 err = videobuf_streamoff(get_queue(fh));
263 res_free(dev, fh, res);
267 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
268 struct v4l2_format *f)
270 struct cx25821_fh *fh = priv;
271 struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
276 err = v4l2_prio_check(&dev->prio, &fh->prio);
281 dprintk(2, "%s()\n", __func__);
282 err = vidioc_try_fmt_vid_cap(file, priv, f);
287 fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
288 fh->vidq.field = f->fmt.pix.field;
290 // check if width and height is valid based on set standard
291 if (is_valid_width(f->fmt.pix.width, dev->tvnorm)) {
292 fh->width = f->fmt.pix.width;
295 if (is_valid_height(f->fmt.pix.height, dev->tvnorm)) {
296 fh->height = f->fmt.pix.height;
299 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
300 pix_format = PIXEL_FRMT_411;
301 else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
302 pix_format = PIXEL_FRMT_422;
306 cx25821_set_pixel_format(dev, SRAM_CH07, pix_format);
308 // check if cif resolution
309 if (fh->width == 320 || fh->width == 352) {
310 dev->use_cif_resolution[SRAM_CH07] = 1;
312 dev->use_cif_resolution[SRAM_CH07] = 0;
314 dev->cif_width[SRAM_CH07] = fh->width;
315 medusa_set_resolution(dev, fh->width, SRAM_CH07);
317 dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width,
318 fh->height, fh->vidq.field);
319 cx25821_call_all(dev, video, s_fmt, f);
324 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
327 struct cx25821_fh *fh = priv;
328 struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
330 ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
332 p->sequence = dev->vidq[SRAM_CH07].count;
336 static int vidioc_log_status(struct file *file, void *priv)
338 struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
341 struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH07];
344 snprintf(name, sizeof(name), "%s/2", dev->name);
345 printk(KERN_INFO "%s/2: ============ START LOG STATUS ============\n",
347 cx25821_call_all(dev, core, log_status);
349 tmp = cx_read(sram_ch->dma_ctl);
350 printk(KERN_INFO "Video input 7 is %s\n",
351 (tmp & 0x11) ? "streaming" : "stopped");
352 printk(KERN_INFO "%s/2: ============= END LOG STATUS =============\n",
357 static int vidioc_s_ctrl(struct file *file, void *priv,
358 struct v4l2_control *ctl)
360 struct cx25821_fh *fh = priv;
361 struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
365 err = v4l2_prio_check(&dev->prio, &fh->prio);
370 return cx25821_set_control(dev, ctl, SRAM_CH07);
374 static const struct v4l2_file_operations video_fops = {
375 .owner = THIS_MODULE,
377 .release = video_release,
381 .ioctl = video_ioctl2,
384 static const struct v4l2_ioctl_ops video_ioctl_ops = {
385 .vidioc_querycap = vidioc_querycap,
386 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
387 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
388 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
389 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
390 .vidioc_reqbufs = vidioc_reqbufs,
391 .vidioc_querybuf = vidioc_querybuf,
392 .vidioc_qbuf = vidioc_qbuf,
393 .vidioc_dqbuf = vidioc_dqbuf,
395 .vidioc_s_std = vidioc_s_std,
396 .vidioc_querystd = vidioc_querystd,
398 .vidioc_cropcap = vidioc_cropcap,
399 .vidioc_s_crop = vidioc_s_crop,
400 .vidioc_g_crop = vidioc_g_crop,
401 .vidioc_enum_input = vidioc_enum_input,
402 .vidioc_g_input = vidioc_g_input,
403 .vidioc_s_input = vidioc_s_input,
404 .vidioc_g_ctrl = vidioc_g_ctrl,
405 .vidioc_s_ctrl = vidioc_s_ctrl,
406 .vidioc_queryctrl = vidioc_queryctrl,
407 .vidioc_streamon = vidioc_streamon,
408 .vidioc_streamoff = vidioc_streamoff,
409 .vidioc_log_status = vidioc_log_status,
410 .vidioc_g_priority = vidioc_g_priority,
411 .vidioc_s_priority = vidioc_s_priority,
412 #ifdef CONFIG_VIDEO_V4L1_COMPAT
413 .vidiocgmbuf = vidiocgmbuf,
416 .vidioc_g_tuner = vidioc_g_tuner,
417 .vidioc_s_tuner = vidioc_s_tuner,
418 .vidioc_g_frequency = vidioc_g_frequency,
419 .vidioc_s_frequency = vidioc_s_frequency,
421 #ifdef CONFIG_VIDEO_ADV_DEBUG
422 .vidioc_g_register = vidioc_g_register,
423 .vidioc_s_register = vidioc_s_register,
427 struct video_device cx25821_video_template7 = {
428 .name = "cx25821-video",
430 .ioctl_ops = &video_ioctl_ops,
431 .tvnorms = CX25821_NORMS,
432 .current_norm = V4L2_STD_NTSC_M,