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"
27 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
29 struct cx25821_buffer *buf = 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_CH05];
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]);
42 if (!list_empty(&q->queued)) {
43 list_add_tail(&buf->vb.queue, &q->queued);
44 buf->vb.state = VIDEOBUF_QUEUED;
45 dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf, buf->vb.i);
47 } else if (list_empty(&q->active)) {
48 list_add_tail(&buf->vb.queue, &q->active);
49 cx25821_start_video_dma(dev, q, buf, &dev->sram_channels[SRAM_CH05]);
50 buf->vb.state = VIDEOBUF_ACTIVE;
51 buf->count = q->count++;
52 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
53 dprintk(2, "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
54 buf, buf->vb. i, buf->count, q->count);
56 prev = list_entry(q->active.prev, struct cx25821_buffer, vb.queue);
57 if (prev->vb.width == buf->vb.width &&
58 prev->vb.height == buf->vb.height &&
59 prev->fmt == buf->fmt) {
60 list_add_tail(&buf->vb.queue, &q->active);
61 buf->vb.state = VIDEOBUF_ACTIVE;
62 buf->count = q->count++;
63 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
65 /* 64 bit bits 63-32 */
66 prev->risc.jmp[2] = cpu_to_le32(0);
67 dprintk(2, "[%p/%d] buffer_queue - append to active, buf->count=%d\n", buf, buf->vb.i, buf->count);
70 list_add_tail(&buf->vb.queue, &q->queued);
71 buf->vb.state = VIDEOBUF_QUEUED;
72 dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf, buf->vb.i);
76 if (list_empty(&q->active))
78 dprintk(2, "active queue empty!\n");
83 static struct videobuf_queue_ops cx25821_video_qops = {
84 .buf_setup = buffer_setup,
85 .buf_prepare = buffer_prepare,
86 .buf_queue = buffer_queue,
87 .buf_release = buffer_release,
91 static int video_open(struct file *file)
93 int minor = video_devdata(file)->minor;
94 struct cx25821_dev *h, *dev = NULL;
95 struct cx25821_fh *fh;
96 struct list_head *list;
97 enum v4l2_buf_type type = 0;
101 list_for_each(list, &cx25821_devlist)
103 h = list_entry(list, struct cx25821_dev, devlist);
105 if (h->video_dev[SRAM_CH05] && h->video_dev[SRAM_CH05]->minor == minor) {
107 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
116 printk("open minor=%d type=%s\n", minor, v4l2_type_names[type]);
118 /* allocate + initialize per filehandle data */
119 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
124 file->private_data = fh;
129 if(dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
134 dev->channel_opened = SRAM_CH05;
135 pix_format = (dev->pixel_formats[dev->channel_opened] == PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
136 fh->fmt = format_by_fourcc(pix_format);
138 v4l2_prio_open(&dev->prio,&fh->prio);
140 videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
141 &dev->pci->dev, &dev->slock,
142 V4L2_BUF_TYPE_VIDEO_CAPTURE,
143 V4L2_FIELD_INTERLACED,
144 sizeof(struct cx25821_buffer),
147 dprintk(1, "post videobuf_queue_init()\n");
153 static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
155 struct cx25821_fh *fh = file->private_data;
159 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
160 if (res_locked(fh->dev, RESOURCE_VIDEO5))
163 return videobuf_read_one(&fh->vidq, data, count, ppos, file->f_flags & O_NONBLOCK);
171 static unsigned int video_poll(struct file *file, struct poll_table_struct *wait)
173 struct cx25821_fh *fh = file->private_data;
174 struct cx25821_buffer *buf;
176 if (res_check(fh, RESOURCE_VIDEO5)) {
177 /* streaming capture */
178 if (list_empty(&fh->vidq.stream))
180 buf = list_entry(fh->vidq.stream.next,
181 struct cx25821_buffer, vb.stream);
184 buf = (struct cx25821_buffer *)fh->vidq.read_buf;
189 poll_wait(file, &buf->vb.done, wait);
190 if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR)
192 if( buf->vb.state == VIDEOBUF_DONE )
194 struct cx25821_dev *dev = fh->dev;
196 if( dev && dev->use_cif_resolution[SRAM_CH05] )
198 u8 cam_id = *((char*)buf->vb.baddr+3);
199 memcpy((char*)buf->vb.baddr, (char*)buf->vb.baddr + (fh->width * 2), (fh->width * 2));
200 *((char*)buf->vb.baddr+3) = cam_id;
204 return POLLIN|POLLRDNORM;
211 static int video_release(struct file *file)
213 struct cx25821_fh *fh = file->private_data;
214 struct cx25821_dev *dev = fh->dev;
216 //stop the risc engine and fifo
217 cx_write(channel5->dma_ctl, 0); /* FIFO and RISC disable */
219 /* stop video capture */
220 if (res_check(fh, RESOURCE_VIDEO5)) {
221 videobuf_queue_cancel(&fh->vidq);
222 res_free(dev, fh, RESOURCE_VIDEO5);
225 if (fh->vidq.read_buf) {
226 buffer_release(&fh->vidq, fh->vidq.read_buf);
227 kfree(fh->vidq.read_buf);
230 videobuf_mmap_free(&fh->vidq);
232 v4l2_prio_close(&dev->prio,&fh->prio);
233 file->private_data = NULL;
240 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
242 struct cx25821_fh *fh = priv;
243 struct cx25821_dev *dev = fh->dev;
245 if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
250 if (unlikely(i != fh->type))
255 if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO5))))
260 return videobuf_streamon(get_queue(fh));
263 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
265 struct cx25821_fh *fh = priv;
266 struct cx25821_dev *dev = fh->dev;
269 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
274 res = get_resource(fh, RESOURCE_VIDEO5);
275 err = videobuf_streamoff(get_queue(fh));
278 res_free(dev, fh, res);
283 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
285 struct cx25821_fh *fh = priv;
286 struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
292 err = v4l2_prio_check(&dev->prio, &fh->prio);
297 dprintk(2, "%s()\n", __func__);
298 err = vidioc_try_fmt_vid_cap(file, priv, f);
303 fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
304 fh->vidq.field = f->fmt.pix.field;
306 // check if width and height is valid based on set standard
307 if (is_valid_width(f->fmt.pix.width, dev->tvnorm))
309 fh->width = f->fmt.pix.width;
312 if (is_valid_height(f->fmt.pix.height, dev->tvnorm))
314 fh->height = f->fmt.pix.height;
317 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
318 pix_format = PIXEL_FRMT_411;
319 else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
320 pix_format = PIXEL_FRMT_422;
324 cx25821_set_pixel_format( dev, SRAM_CH05, pix_format );
326 // check if cif resolution
327 if (fh->width == 320 || fh->width == 352)
329 dev->use_cif_resolution[SRAM_CH05] = 1;
332 dev->use_cif_resolution[SRAM_CH05] = 0;
334 dev->cif_width[SRAM_CH05] = fh->width;
335 medusa_set_resolution( dev, fh->width, SRAM_CH05 );
337 dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width, fh->height, fh->vidq.field);
338 cx25821_call_all(dev, video, s_fmt, f);
343 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
346 struct cx25821_fh *fh = priv;
347 struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
349 ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
351 p->sequence = dev->vidq[SRAM_CH05].count;
355 static int vidioc_log_status (struct file *file, void *priv)
357 struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
360 struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH05];
363 snprintf(name, sizeof(name), "%s/2", dev->name);
364 printk(KERN_INFO "%s/2: ============ START LOG STATUS ============\n",
366 cx25821_call_all(dev, core, log_status);
368 tmp = cx_read(sram_ch->dma_ctl);
369 printk(KERN_INFO "Video input 5 is %s\n", (tmp & 0x11)?"streaming" : "stopped");
370 printk(KERN_INFO "%s/2: ============= END LOG STATUS =============\n",
375 static int vidioc_s_ctrl(struct file *file, void *priv,
376 struct v4l2_control *ctl)
378 struct cx25821_fh *fh = priv;
379 struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
383 err = v4l2_prio_check(&dev->prio, &fh->prio);
388 return cx25821_set_control(dev, ctl, SRAM_CH05);
392 static const struct v4l2_file_operations video_fops = {
393 .owner = THIS_MODULE,
395 .release = video_release,
399 .ioctl = video_ioctl2,
402 static const struct v4l2_ioctl_ops video_ioctl_ops = {
403 .vidioc_querycap = vidioc_querycap,
404 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
405 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
406 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
407 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
408 .vidioc_reqbufs = vidioc_reqbufs,
409 .vidioc_querybuf = vidioc_querybuf,
410 .vidioc_qbuf = vidioc_qbuf,
411 .vidioc_dqbuf = vidioc_dqbuf,
413 .vidioc_s_std = vidioc_s_std,
414 .vidioc_querystd = vidioc_querystd,
416 .vidioc_cropcap = vidioc_cropcap,
417 .vidioc_s_crop = vidioc_s_crop,
418 .vidioc_g_crop = vidioc_g_crop,
419 .vidioc_enum_input = vidioc_enum_input,
420 .vidioc_g_input = vidioc_g_input,
421 .vidioc_s_input = vidioc_s_input,
422 .vidioc_g_ctrl = vidioc_g_ctrl,
423 .vidioc_s_ctrl = vidioc_s_ctrl,
424 .vidioc_queryctrl = vidioc_queryctrl,
425 .vidioc_streamon = vidioc_streamon,
426 .vidioc_streamoff = vidioc_streamoff,
427 .vidioc_log_status = vidioc_log_status,
428 .vidioc_g_priority = vidioc_g_priority,
429 .vidioc_s_priority = vidioc_s_priority,
430 #ifdef CONFIG_VIDEO_V4L1_COMPAT
431 .vidiocgmbuf = vidiocgmbuf,
434 .vidioc_g_tuner = vidioc_g_tuner,
435 .vidioc_s_tuner = vidioc_s_tuner,
436 .vidioc_g_frequency = vidioc_g_frequency,
437 .vidioc_s_frequency = vidioc_s_frequency,
439 #ifdef CONFIG_VIDEO_ADV_DEBUG
440 .vidioc_g_register = vidioc_g_register,
441 .vidioc_s_register = vidioc_s_register,
445 struct video_device cx25821_video_template5 = {
446 .name = "cx25821-video",
449 .ioctl_ops = &video_ioctl_ops,
450 .tvnorms = CX25821_NORMS,
451 .current_norm = V4L2_STD_NTSC_M,