Commit | Line | Data |
---|---|---|
e0d3bafd SD |
1 | /* |
2 | cx231xx_vbi.c - driver for Conexant Cx23100/101/102 USB video capture devices | |
3 | ||
4 | Copyright (C) 2008 <srinivasa.deevi at conexant dot com> | |
84b5dbf3 | 5 | Based on cx88 driver |
e0d3bafd SD |
6 | |
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
589dadf2 | 22 | #include "cx231xx.h" |
e0d3bafd SD |
23 | #include <linux/init.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/bitmap.h> | |
e0d3bafd | 28 | #include <linux/i2c.h> |
e0d3bafd SD |
29 | #include <linux/mm.h> |
30 | #include <linux/mutex.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
e0d3bafd SD |
32 | |
33 | #include <media/v4l2-common.h> | |
34 | #include <media/v4l2-ioctl.h> | |
d647f0b7 | 35 | #include <media/drv-intf/msp3400.h> |
e0d3bafd SD |
36 | #include <media/tuner.h> |
37 | ||
e0d3bafd SD |
38 | #include "cx231xx-vbi.h" |
39 | ||
84b5dbf3 | 40 | static inline void print_err_status(struct cx231xx *dev, int packet, int status) |
e0d3bafd SD |
41 | { |
42 | char *errmsg = "Unknown"; | |
43 | ||
44 | switch (status) { | |
45 | case -ENOENT: | |
46 | errmsg = "unlinked synchronuously"; | |
47 | break; | |
48 | case -ECONNRESET: | |
49 | errmsg = "unlinked asynchronuously"; | |
50 | break; | |
51 | case -ENOSR: | |
52 | errmsg = "Buffer error (overrun)"; | |
53 | break; | |
54 | case -EPIPE: | |
55 | errmsg = "Stalled (device not responding)"; | |
56 | break; | |
57 | case -EOVERFLOW: | |
58 | errmsg = "Babble (bad cable?)"; | |
59 | break; | |
60 | case -EPROTO: | |
61 | errmsg = "Bit-stuff error (bad cable?)"; | |
62 | break; | |
63 | case -EILSEQ: | |
64 | errmsg = "CRC/Timeout (could be anything)"; | |
65 | break; | |
66 | case -ETIME: | |
67 | errmsg = "Device does not respond"; | |
68 | break; | |
69 | } | |
70 | if (packet < 0) { | |
336fea92 | 71 | dev_err(dev->dev, |
b7085c08 | 72 | "URB status %d [%s].\n", status, errmsg); |
e0d3bafd | 73 | } else { |
336fea92 | 74 | dev_err(dev->dev, |
b7085c08 | 75 | "URB packet %d, status %d [%s].\n", |
ed0e3729 | 76 | packet, status, errmsg); |
e0d3bafd SD |
77 | } |
78 | } | |
79 | ||
80 | /* | |
81 | * Controls the isoc copy of each urb packet | |
82 | */ | |
83 | static inline int cx231xx_isoc_vbi_copy(struct cx231xx *dev, struct urb *urb) | |
84 | { | |
84b5dbf3 MCC |
85 | struct cx231xx_dmaqueue *dma_q = urb->context; |
86 | int rc = 1; | |
e0d3bafd | 87 | unsigned char *p_buffer; |
84b5dbf3 MCC |
88 | u32 bytes_parsed = 0, buffer_size = 0; |
89 | u8 sav_eav = 0; | |
e0d3bafd SD |
90 | |
91 | if (!dev) | |
92 | return 0; | |
93 | ||
990862a2 | 94 | if (dev->state & DEV_DISCONNECTED) |
e0d3bafd SD |
95 | return 0; |
96 | ||
97 | if (urb->status < 0) { | |
98 | print_err_status(dev, -1, urb->status); | |
99 | if (urb->status == -ENOENT) | |
100 | return 0; | |
101 | } | |
102 | ||
84b5dbf3 MCC |
103 | /* get buffer pointer and length */ |
104 | p_buffer = urb->transfer_buffer; | |
105 | buffer_size = urb->actual_length; | |
106 | ||
107 | if (buffer_size > 0) { | |
84b5dbf3 MCC |
108 | bytes_parsed = 0; |
109 | ||
110 | if (dma_q->is_partial_line) { | |
cde4362f MCC |
111 | /* Handle the case where we were working on a partial |
112 | line */ | |
84b5dbf3 MCC |
113 | sav_eav = dma_q->last_sav; |
114 | } else { | |
cde4362f MCC |
115 | /* Check for a SAV/EAV overlapping the |
116 | buffer boundary */ | |
117 | ||
118 | sav_eav = cx231xx_find_boundary_SAV_EAV(p_buffer, | |
84b5dbf3 MCC |
119 | dma_q->partial_buf, |
120 | &bytes_parsed); | |
121 | } | |
122 | ||
123 | sav_eav &= 0xF0; | |
cde4362f MCC |
124 | /* Get the first line if we have some portion of an SAV/EAV from |
125 | the last buffer or a partial line */ | |
84b5dbf3 | 126 | if (sav_eav) { |
cde4362f MCC |
127 | bytes_parsed += cx231xx_get_vbi_line(dev, dma_q, |
128 | sav_eav, /* SAV/EAV */ | |
129 | p_buffer + bytes_parsed, /* p_buffer */ | |
130 | buffer_size - bytes_parsed); /* buffer size */ | |
84b5dbf3 MCC |
131 | } |
132 | ||
133 | /* Now parse data that is completely in this buffer */ | |
134 | dma_q->is_partial_line = 0; | |
135 | ||
136 | while (bytes_parsed < buffer_size) { | |
137 | u32 bytes_used = 0; | |
138 | ||
b9255176 SD |
139 | sav_eav = cx231xx_find_next_SAV_EAV( |
140 | p_buffer + bytes_parsed, /* p_buffer */ | |
141 | buffer_size - bytes_parsed, /* buffer size */ | |
142 | &bytes_used); /* bytes used to get SAV/EAV */ | |
84b5dbf3 MCC |
143 | |
144 | bytes_parsed += bytes_used; | |
145 | ||
146 | sav_eav &= 0xF0; | |
147 | if (sav_eav && (bytes_parsed < buffer_size)) { | |
cde4362f | 148 | bytes_parsed += cx231xx_get_vbi_line(dev, |
b9255176 SD |
149 | dma_q, sav_eav, /* SAV/EAV */ |
150 | p_buffer+bytes_parsed, /* p_buffer */ | |
151 | buffer_size-bytes_parsed);/*buf size*/ | |
84b5dbf3 MCC |
152 | } |
153 | } | |
154 | ||
b9255176 SD |
155 | /* Save the last four bytes of the buffer so we can |
156 | check the buffer boundary condition next time */ | |
84b5dbf3 MCC |
157 | memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4); |
158 | bytes_parsed = 0; | |
e0d3bafd SD |
159 | } |
160 | ||
161 | return rc; | |
162 | } | |
163 | ||
164 | /* ------------------------------------------------------------------ | |
165 | Vbi buf operations | |
166 | ------------------------------------------------------------------*/ | |
167 | ||
168 | static int | |
84b5dbf3 MCC |
169 | vbi_buffer_setup(struct videobuf_queue *vq, unsigned int *count, |
170 | unsigned int *size) | |
e0d3bafd SD |
171 | { |
172 | struct cx231xx_fh *fh = vq->priv_data; | |
84b5dbf3 MCC |
173 | struct cx231xx *dev = fh->dev; |
174 | u32 height = 0; | |
e0d3bafd SD |
175 | |
176 | height = ((dev->norm & V4L2_STD_625_50) ? | |
84b5dbf3 | 177 | PAL_VBI_LINES : NTSC_VBI_LINES); |
e0d3bafd | 178 | |
99d35a0e | 179 | *size = (dev->width * height * 2 * 2); |
e0d3bafd SD |
180 | if (0 == *count) |
181 | *count = CX231XX_DEF_VBI_BUF; | |
182 | ||
183 | if (*count < CX231XX_MIN_BUF) | |
184 | *count = CX231XX_MIN_BUF; | |
185 | ||
e0d3bafd SD |
186 | return 0; |
187 | } | |
188 | ||
189 | /* This is called *without* dev->slock held; please keep it that way */ | |
190 | static void free_buffer(struct videobuf_queue *vq, struct cx231xx_buffer *buf) | |
191 | { | |
84b5dbf3 MCC |
192 | struct cx231xx_fh *fh = vq->priv_data; |
193 | struct cx231xx *dev = fh->dev; | |
e0d3bafd | 194 | unsigned long flags = 0; |
09f2082e | 195 | BUG_ON(in_interrupt()); |
e0d3bafd SD |
196 | |
197 | /* We used to wait for the buffer to finish here, but this didn't work | |
198 | because, as we were keeping the state as VIDEOBUF_QUEUED, | |
199 | videobuf_queue_cancel marked it as finished for us. | |
200 | (Also, it could wedge forever if the hardware was misconfigured.) | |
201 | ||
202 | This should be safe; by the time we get here, the buffer isn't | |
203 | queued anymore. If we ever start marking the buffers as | |
204 | VIDEOBUF_ACTIVE, it won't be, though. | |
84b5dbf3 | 205 | */ |
e0d3bafd | 206 | spin_lock_irqsave(&dev->vbi_mode.slock, flags); |
64fbf444 PB |
207 | if (dev->vbi_mode.bulk_ctl.buf == buf) |
208 | dev->vbi_mode.bulk_ctl.buf = NULL; | |
e0d3bafd SD |
209 | spin_unlock_irqrestore(&dev->vbi_mode.slock, flags); |
210 | ||
211 | videobuf_vmalloc_free(&buf->vb); | |
212 | buf->vb.state = VIDEOBUF_NEEDS_INIT; | |
213 | } | |
214 | ||
215 | static int | |
216 | vbi_buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, | |
84b5dbf3 | 217 | enum v4l2_field field) |
e0d3bafd | 218 | { |
84b5dbf3 MCC |
219 | struct cx231xx_fh *fh = vq->priv_data; |
220 | struct cx231xx_buffer *buf = | |
221 | container_of(vb, struct cx231xx_buffer, vb); | |
222 | struct cx231xx *dev = fh->dev; | |
223 | int rc = 0, urb_init = 0; | |
224 | u32 height = 0; | |
e0d3bafd SD |
225 | |
226 | height = ((dev->norm & V4L2_STD_625_50) ? | |
84b5dbf3 | 227 | PAL_VBI_LINES : NTSC_VBI_LINES); |
99d35a0e | 228 | buf->vb.size = ((dev->width << 1) * height * 2); |
e0d3bafd | 229 | |
84b5dbf3 | 230 | if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) |
e0d3bafd SD |
231 | return -EINVAL; |
232 | ||
84b5dbf3 | 233 | buf->vb.width = dev->width; |
e0d3bafd | 234 | buf->vb.height = height; |
84b5dbf3 MCC |
235 | buf->vb.field = field; |
236 | buf->vb.field = V4L2_FIELD_SEQ_TB; | |
e0d3bafd SD |
237 | |
238 | if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { | |
239 | rc = videobuf_iolock(vq, &buf->vb, NULL); | |
240 | if (rc < 0) | |
241 | goto fail; | |
242 | } | |
243 | ||
64fbf444 | 244 | if (!dev->vbi_mode.bulk_ctl.num_bufs) |
e0d3bafd SD |
245 | urb_init = 1; |
246 | ||
247 | if (urb_init) { | |
248 | rc = cx231xx_init_vbi_isoc(dev, CX231XX_NUM_VBI_PACKETS, | |
84b5dbf3 MCC |
249 | CX231XX_NUM_VBI_BUFS, |
250 | dev->vbi_mode.alt_max_pkt_size[0], | |
251 | cx231xx_isoc_vbi_copy); | |
e0d3bafd SD |
252 | if (rc < 0) |
253 | goto fail; | |
254 | } | |
255 | ||
256 | buf->vb.state = VIDEOBUF_PREPARED; | |
257 | return 0; | |
258 | ||
cde4362f | 259 | fail: |
e0d3bafd SD |
260 | free_buffer(vq, buf); |
261 | return rc; | |
262 | } | |
263 | ||
264 | static void | |
265 | vbi_buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
266 | { | |
84b5dbf3 MCC |
267 | struct cx231xx_buffer *buf = |
268 | container_of(vb, struct cx231xx_buffer, vb); | |
269 | struct cx231xx_fh *fh = vq->priv_data; | |
270 | struct cx231xx *dev = fh->dev; | |
271 | struct cx231xx_dmaqueue *vidq = &dev->vbi_mode.vidq; | |
e0d3bafd SD |
272 | |
273 | buf->vb.state = VIDEOBUF_QUEUED; | |
274 | list_add_tail(&buf->vb.queue, &vidq->active); | |
275 | ||
276 | } | |
277 | ||
278 | static void vbi_buffer_release(struct videobuf_queue *vq, | |
84b5dbf3 | 279 | struct videobuf_buffer *vb) |
e0d3bafd | 280 | { |
84b5dbf3 MCC |
281 | struct cx231xx_buffer *buf = |
282 | container_of(vb, struct cx231xx_buffer, vb); | |
e0d3bafd | 283 | |
e0d3bafd SD |
284 | |
285 | free_buffer(vq, buf); | |
286 | } | |
287 | ||
e0d3bafd | 288 | struct videobuf_queue_ops cx231xx_vbi_qops = { |
cde4362f | 289 | .buf_setup = vbi_buffer_setup, |
84b5dbf3 | 290 | .buf_prepare = vbi_buffer_prepare, |
cde4362f | 291 | .buf_queue = vbi_buffer_queue, |
84b5dbf3 | 292 | .buf_release = vbi_buffer_release, |
e0d3bafd SD |
293 | }; |
294 | ||
e0d3bafd SD |
295 | /* ------------------------------------------------------------------ |
296 | URB control | |
297 | ------------------------------------------------------------------*/ | |
298 | ||
299 | /* | |
300 | * IRQ callback, called by URB callback | |
301 | */ | |
302 | static void cx231xx_irq_vbi_callback(struct urb *urb) | |
303 | { | |
84b5dbf3 MCC |
304 | struct cx231xx_dmaqueue *dma_q = urb->context; |
305 | struct cx231xx_video_mode *vmode = | |
306 | container_of(dma_q, struct cx231xx_video_mode, vidq); | |
307 | struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode); | |
e0d3bafd | 308 | |
84b5dbf3 MCC |
309 | switch (urb->status) { |
310 | case 0: /* success */ | |
311 | case -ETIMEDOUT: /* NAK */ | |
312 | break; | |
313 | case -ECONNRESET: /* kill */ | |
314 | case -ENOENT: | |
315 | case -ESHUTDOWN: | |
316 | return; | |
317 | default: /* error */ | |
336fea92 | 318 | dev_err(dev->dev, |
b7085c08 | 319 | "urb completition error %d.\n", urb->status); |
84b5dbf3 | 320 | break; |
e0d3bafd SD |
321 | } |
322 | ||
323 | /* Copy data from URB */ | |
324 | spin_lock(&dev->vbi_mode.slock); | |
da983503 | 325 | dev->vbi_mode.bulk_ctl.bulk_copy(dev, urb); |
e0d3bafd SD |
326 | spin_unlock(&dev->vbi_mode.slock); |
327 | ||
328 | /* Reset status */ | |
329 | urb->status = 0; | |
330 | ||
331 | urb->status = usb_submit_urb(urb, GFP_ATOMIC); | |
332 | if (urb->status) { | |
336fea92 | 333 | dev_err(dev->dev, "urb resubmit failed (error=%i)\n", |
ed0e3729 | 334 | urb->status); |
e0d3bafd SD |
335 | } |
336 | } | |
337 | ||
338 | /* | |
339 | * Stop and Deallocate URBs | |
340 | */ | |
341 | void cx231xx_uninit_vbi_isoc(struct cx231xx *dev) | |
342 | { | |
343 | struct urb *urb; | |
344 | int i; | |
345 | ||
336fea92 | 346 | dev_dbg(dev->dev, "called cx231xx_uninit_vbi_isoc\n"); |
e0d3bafd | 347 | |
64fbf444 PB |
348 | dev->vbi_mode.bulk_ctl.nfields = -1; |
349 | for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) { | |
350 | urb = dev->vbi_mode.bulk_ctl.urb[i]; | |
e0d3bafd | 351 | if (urb) { |
84b5dbf3 MCC |
352 | if (!irqs_disabled()) |
353 | usb_kill_urb(urb); | |
354 | else | |
355 | usb_unlink_urb(urb); | |
e0d3bafd | 356 | |
64fbf444 | 357 | if (dev->vbi_mode.bulk_ctl.transfer_buffer[i]) { |
e0d3bafd | 358 | |
64fbf444 | 359 | kfree(dev->vbi_mode.bulk_ctl. |
84b5dbf3 | 360 | transfer_buffer[i]); |
64fbf444 | 361 | dev->vbi_mode.bulk_ctl.transfer_buffer[i] = |
84b5dbf3 | 362 | NULL; |
e0d3bafd SD |
363 | } |
364 | usb_free_urb(urb); | |
64fbf444 | 365 | dev->vbi_mode.bulk_ctl.urb[i] = NULL; |
e0d3bafd | 366 | } |
64fbf444 | 367 | dev->vbi_mode.bulk_ctl.transfer_buffer[i] = NULL; |
e0d3bafd SD |
368 | } |
369 | ||
64fbf444 PB |
370 | kfree(dev->vbi_mode.bulk_ctl.urb); |
371 | kfree(dev->vbi_mode.bulk_ctl.transfer_buffer); | |
e0d3bafd | 372 | |
64fbf444 PB |
373 | dev->vbi_mode.bulk_ctl.urb = NULL; |
374 | dev->vbi_mode.bulk_ctl.transfer_buffer = NULL; | |
375 | dev->vbi_mode.bulk_ctl.num_bufs = 0; | |
e0d3bafd SD |
376 | |
377 | cx231xx_capture_start(dev, 0, Vbi); | |
378 | } | |
379 | EXPORT_SYMBOL_GPL(cx231xx_uninit_vbi_isoc); | |
380 | ||
381 | /* | |
382 | * Allocate URBs and start IRQ | |
383 | */ | |
384 | int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets, | |
84b5dbf3 | 385 | int num_bufs, int max_pkt_size, |
64fbf444 | 386 | int (*bulk_copy) (struct cx231xx *dev, |
cde4362f | 387 | struct urb *urb)) |
e0d3bafd SD |
388 | { |
389 | struct cx231xx_dmaqueue *dma_q = &dev->vbi_mode.vidq; | |
390 | int i; | |
391 | int sb_size, pipe; | |
392 | struct urb *urb; | |
393 | int rc; | |
394 | ||
336fea92 | 395 | dev_dbg(dev->dev, "called cx231xx_vbi_isoc\n"); |
e0d3bafd SD |
396 | |
397 | /* De-allocates all pending stuff */ | |
398 | cx231xx_uninit_vbi_isoc(dev); | |
399 | ||
84b5dbf3 MCC |
400 | /* clear if any halt */ |
401 | usb_clear_halt(dev->udev, | |
402 | usb_rcvbulkpipe(dev->udev, | |
403 | dev->vbi_mode.end_point_addr)); | |
e0d3bafd | 404 | |
64fbf444 PB |
405 | dev->vbi_mode.bulk_ctl.bulk_copy = bulk_copy; |
406 | dev->vbi_mode.bulk_ctl.num_bufs = num_bufs; | |
84b5dbf3 MCC |
407 | dma_q->pos = 0; |
408 | dma_q->is_partial_line = 0; | |
409 | dma_q->last_sav = 0; | |
410 | dma_q->current_field = -1; | |
411 | dma_q->bytes_left_in_line = dev->width << 1; | |
412 | dma_q->lines_per_field = ((dev->norm & V4L2_STD_625_50) ? | |
413 | PAL_VBI_LINES : NTSC_VBI_LINES); | |
414 | dma_q->lines_completed = 0; | |
415 | for (i = 0; i < 8; i++) | |
416 | dma_q->partial_buf[i] = 0; | |
417 | ||
64fbf444 | 418 | dev->vbi_mode.bulk_ctl.urb = kzalloc(sizeof(void *) * num_bufs, |
cde4362f | 419 | GFP_KERNEL); |
64fbf444 | 420 | if (!dev->vbi_mode.bulk_ctl.urb) { |
336fea92 | 421 | dev_err(dev->dev, |
b7085c08 | 422 | "cannot alloc memory for usb buffers\n"); |
e0d3bafd SD |
423 | return -ENOMEM; |
424 | } | |
425 | ||
64fbf444 | 426 | dev->vbi_mode.bulk_ctl.transfer_buffer = |
84b5dbf3 | 427 | kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL); |
64fbf444 | 428 | if (!dev->vbi_mode.bulk_ctl.transfer_buffer) { |
336fea92 | 429 | dev_err(dev->dev, |
b7085c08 | 430 | "cannot allocate memory for usbtransfer\n"); |
64fbf444 | 431 | kfree(dev->vbi_mode.bulk_ctl.urb); |
e0d3bafd SD |
432 | return -ENOMEM; |
433 | } | |
434 | ||
64fbf444 PB |
435 | dev->vbi_mode.bulk_ctl.max_pkt_size = max_pkt_size; |
436 | dev->vbi_mode.bulk_ctl.buf = NULL; | |
e0d3bafd | 437 | |
64fbf444 | 438 | sb_size = max_packets * dev->vbi_mode.bulk_ctl.max_pkt_size; |
e0d3bafd SD |
439 | |
440 | /* allocate urbs and transfer buffers */ | |
64fbf444 | 441 | for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) { |
e0d3bafd SD |
442 | |
443 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
444 | if (!urb) { | |
e0d3bafd SD |
445 | cx231xx_uninit_vbi_isoc(dev); |
446 | return -ENOMEM; | |
447 | } | |
64fbf444 | 448 | dev->vbi_mode.bulk_ctl.urb[i] = urb; |
cd5534be | 449 | urb->transfer_flags = 0; |
e0d3bafd | 450 | |
64fbf444 | 451 | dev->vbi_mode.bulk_ctl.transfer_buffer[i] = |
84b5dbf3 | 452 | kzalloc(sb_size, GFP_KERNEL); |
64fbf444 | 453 | if (!dev->vbi_mode.bulk_ctl.transfer_buffer[i]) { |
336fea92 | 454 | dev_err(dev->dev, |
b7085c08 | 455 | "unable to allocate %i bytes for transfer buffer %i%s\n", |
ed0e3729 MCC |
456 | sb_size, i, |
457 | in_interrupt() ? " while in int" : ""); | |
e0d3bafd SD |
458 | cx231xx_uninit_vbi_isoc(dev); |
459 | return -ENOMEM; | |
460 | } | |
461 | ||
462 | pipe = usb_rcvbulkpipe(dev->udev, dev->vbi_mode.end_point_addr); | |
84b5dbf3 | 463 | usb_fill_bulk_urb(urb, dev->udev, pipe, |
64fbf444 | 464 | dev->vbi_mode.bulk_ctl.transfer_buffer[i], |
84b5dbf3 | 465 | sb_size, cx231xx_irq_vbi_callback, dma_q); |
e0d3bafd SD |
466 | } |
467 | ||
468 | init_waitqueue_head(&dma_q->wq); | |
469 | ||
470 | /* submit urbs and enables IRQ */ | |
64fbf444 PB |
471 | for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) { |
472 | rc = usb_submit_urb(dev->vbi_mode.bulk_ctl.urb[i], GFP_ATOMIC); | |
e0d3bafd | 473 | if (rc) { |
336fea92 | 474 | dev_err(dev->dev, |
b7085c08 | 475 | "submit of urb %i failed (error=%i)\n", i, rc); |
e0d3bafd SD |
476 | cx231xx_uninit_vbi_isoc(dev); |
477 | return rc; | |
478 | } | |
479 | } | |
480 | ||
84b5dbf3 | 481 | cx231xx_capture_start(dev, 1, Vbi); |
e0d3bafd SD |
482 | |
483 | return 0; | |
484 | } | |
84b5dbf3 | 485 | EXPORT_SYMBOL_GPL(cx231xx_init_vbi_isoc); |
e0d3bafd | 486 | |
cde4362f MCC |
487 | u32 cx231xx_get_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, |
488 | u8 sav_eav, u8 *p_buffer, u32 buffer_size) | |
e0d3bafd | 489 | { |
84b5dbf3 MCC |
490 | u32 bytes_copied = 0; |
491 | int current_field = -1; | |
e0d3bafd | 492 | |
84b5dbf3 | 493 | switch (sav_eav) { |
e0d3bafd | 494 | |
84b5dbf3 MCC |
495 | case SAV_VBI_FIELD1: |
496 | current_field = 1; | |
497 | break; | |
e0d3bafd | 498 | |
84b5dbf3 MCC |
499 | case SAV_VBI_FIELD2: |
500 | current_field = 2; | |
501 | break; | |
502 | default: | |
503 | break; | |
504 | } | |
e0d3bafd | 505 | |
84b5dbf3 MCC |
506 | if (current_field < 0) |
507 | return bytes_copied; | |
e0d3bafd | 508 | |
84b5dbf3 | 509 | dma_q->last_sav = sav_eav; |
e0d3bafd | 510 | |
84b5dbf3 MCC |
511 | bytes_copied = |
512 | cx231xx_copy_vbi_line(dev, dma_q, p_buffer, buffer_size, | |
513 | current_field); | |
e0d3bafd | 514 | |
84b5dbf3 | 515 | return bytes_copied; |
e0d3bafd SD |
516 | } |
517 | ||
518 | /* | |
519 | * Announces that a buffer were filled and request the next | |
520 | */ | |
521 | static inline void vbi_buffer_filled(struct cx231xx *dev, | |
84b5dbf3 MCC |
522 | struct cx231xx_dmaqueue *dma_q, |
523 | struct cx231xx_buffer *buf) | |
e0d3bafd SD |
524 | { |
525 | /* Advice that buffer was filled */ | |
336fea92 | 526 | /* dev_dbg(dev->dev, "[%p/%d] wakeup\n", buf, buf->vb.i); */ |
e0d3bafd SD |
527 | |
528 | buf->vb.state = VIDEOBUF_DONE; | |
529 | buf->vb.field_count++; | |
8e6057b5 | 530 | v4l2_get_timestamp(&buf->vb.ts); |
e0d3bafd | 531 | |
64fbf444 | 532 | dev->vbi_mode.bulk_ctl.buf = NULL; |
e0d3bafd SD |
533 | |
534 | list_del(&buf->vb.queue); | |
535 | wake_up(&buf->vb.done); | |
536 | } | |
537 | ||
84b5dbf3 | 538 | u32 cx231xx_copy_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, |
cde4362f | 539 | u8 *p_line, u32 length, int field_number) |
e0d3bafd | 540 | { |
84b5dbf3 MCC |
541 | u32 bytes_to_copy; |
542 | struct cx231xx_buffer *buf; | |
543 | u32 _line_size = dev->width * 2; | |
e0d3bafd | 544 | |
99d35a0e DH |
545 | if (dma_q->current_field == -1) { |
546 | /* Just starting up */ | |
84b5dbf3 | 547 | cx231xx_reset_vbi_buffer(dev, dma_q); |
99d35a0e DH |
548 | } |
549 | ||
550 | if (dma_q->current_field != field_number) | |
551 | dma_q->lines_completed = 0; | |
e0d3bafd | 552 | |
84b5dbf3 | 553 | /* get the buffer pointer */ |
64fbf444 | 554 | buf = dev->vbi_mode.bulk_ctl.buf; |
e0d3bafd | 555 | |
84b5dbf3 MCC |
556 | /* Remember the field number for next time */ |
557 | dma_q->current_field = field_number; | |
e0d3bafd | 558 | |
84b5dbf3 MCC |
559 | bytes_to_copy = dma_q->bytes_left_in_line; |
560 | if (bytes_to_copy > length) | |
561 | bytes_to_copy = length; | |
e0d3bafd | 562 | |
84b5dbf3 MCC |
563 | if (dma_q->lines_completed >= dma_q->lines_per_field) { |
564 | dma_q->bytes_left_in_line -= bytes_to_copy; | |
565 | dma_q->is_partial_line = | |
566 | (dma_q->bytes_left_in_line == 0) ? 0 : 1; | |
567 | return 0; | |
568 | } | |
e0d3bafd | 569 | |
84b5dbf3 | 570 | dma_q->is_partial_line = 1; |
e0d3bafd | 571 | |
84b5dbf3 MCC |
572 | /* If we don't have a buffer, just return the number of bytes we would |
573 | have copied if we had a buffer. */ | |
574 | if (!buf) { | |
575 | dma_q->bytes_left_in_line -= bytes_to_copy; | |
576 | dma_q->is_partial_line = | |
577 | (dma_q->bytes_left_in_line == 0) ? 0 : 1; | |
578 | return bytes_to_copy; | |
579 | } | |
e0d3bafd | 580 | |
84b5dbf3 MCC |
581 | /* copy the data to video buffer */ |
582 | cx231xx_do_vbi_copy(dev, dma_q, p_line, bytes_to_copy); | |
e0d3bafd | 583 | |
84b5dbf3 MCC |
584 | dma_q->pos += bytes_to_copy; |
585 | dma_q->bytes_left_in_line -= bytes_to_copy; | |
e0d3bafd | 586 | |
84b5dbf3 | 587 | if (dma_q->bytes_left_in_line == 0) { |
e0d3bafd | 588 | |
84b5dbf3 MCC |
589 | dma_q->bytes_left_in_line = _line_size; |
590 | dma_q->lines_completed++; | |
591 | dma_q->is_partial_line = 0; | |
e0d3bafd | 592 | |
84b5dbf3 | 593 | if (cx231xx_is_vbi_buffer_done(dev, dma_q) && buf) { |
e0d3bafd | 594 | |
84b5dbf3 | 595 | vbi_buffer_filled(dev, dma_q, buf); |
e0d3bafd | 596 | |
84b5dbf3 | 597 | dma_q->pos = 0; |
84b5dbf3 | 598 | dma_q->lines_completed = 0; |
99d35a0e | 599 | cx231xx_reset_vbi_buffer(dev, dma_q); |
84b5dbf3 MCC |
600 | } |
601 | } | |
e0d3bafd | 602 | |
84b5dbf3 | 603 | return bytes_to_copy; |
e0d3bafd SD |
604 | } |
605 | ||
606 | /* | |
607 | * video-buf generic routine to get the next available buffer | |
608 | */ | |
609 | static inline void get_next_vbi_buf(struct cx231xx_dmaqueue *dma_q, | |
84b5dbf3 | 610 | struct cx231xx_buffer **buf) |
e0d3bafd | 611 | { |
84b5dbf3 MCC |
612 | struct cx231xx_video_mode *vmode = |
613 | container_of(dma_q, struct cx231xx_video_mode, vidq); | |
614 | struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode); | |
e0d3bafd SD |
615 | char *outp; |
616 | ||
617 | if (list_empty(&dma_q->active)) { | |
336fea92 | 618 | dev_err(dev->dev, "No active queue to serve\n"); |
64fbf444 | 619 | dev->vbi_mode.bulk_ctl.buf = NULL; |
e0d3bafd SD |
620 | *buf = NULL; |
621 | return; | |
622 | } | |
623 | ||
624 | /* Get the next buffer */ | |
625 | *buf = list_entry(dma_q->active.next, struct cx231xx_buffer, vb.queue); | |
626 | ||
25985edc | 627 | /* Cleans up buffer - Useful for testing for frame/URB loss */ |
e0d3bafd SD |
628 | outp = videobuf_to_vmalloc(&(*buf)->vb); |
629 | memset(outp, 0, (*buf)->vb.size); | |
630 | ||
64fbf444 | 631 | dev->vbi_mode.bulk_ctl.buf = *buf; |
e0d3bafd SD |
632 | |
633 | return; | |
634 | } | |
635 | ||
84b5dbf3 MCC |
636 | void cx231xx_reset_vbi_buffer(struct cx231xx *dev, |
637 | struct cx231xx_dmaqueue *dma_q) | |
e0d3bafd | 638 | { |
84b5dbf3 | 639 | struct cx231xx_buffer *buf; |
e0d3bafd | 640 | |
64fbf444 | 641 | buf = dev->vbi_mode.bulk_ctl.buf; |
e0d3bafd | 642 | |
84b5dbf3 | 643 | if (buf == NULL) { |
84b5dbf3 MCC |
644 | /* first try to get the buffer */ |
645 | get_next_vbi_buf(dma_q, &buf); | |
e0d3bafd | 646 | |
84b5dbf3 MCC |
647 | dma_q->pos = 0; |
648 | dma_q->current_field = -1; | |
649 | } | |
e0d3bafd | 650 | |
84b5dbf3 MCC |
651 | dma_q->bytes_left_in_line = dev->width << 1; |
652 | dma_q->lines_completed = 0; | |
e0d3bafd SD |
653 | } |
654 | ||
655 | int cx231xx_do_vbi_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, | |
cde4362f | 656 | u8 *p_buffer, u32 bytes_to_copy) |
e0d3bafd | 657 | { |
84b5dbf3 MCC |
658 | u8 *p_out_buffer = NULL; |
659 | u32 current_line_bytes_copied = 0; | |
660 | struct cx231xx_buffer *buf; | |
661 | u32 _line_size = dev->width << 1; | |
662 | void *startwrite; | |
663 | int offset, lencopy; | |
e0d3bafd | 664 | |
64fbf444 | 665 | buf = dev->vbi_mode.bulk_ctl.buf; |
e0d3bafd | 666 | |
cde4362f MCC |
667 | if (buf == NULL) |
668 | return -EINVAL; | |
e0d3bafd SD |
669 | |
670 | p_out_buffer = videobuf_to_vmalloc(&buf->vb); | |
671 | ||
84b5dbf3 MCC |
672 | if (dma_q->bytes_left_in_line != _line_size) { |
673 | current_line_bytes_copied = | |
674 | _line_size - dma_q->bytes_left_in_line; | |
675 | } | |
e0d3bafd | 676 | |
cde4362f MCC |
677 | offset = (dma_q->lines_completed * _line_size) + |
678 | current_line_bytes_copied; | |
e0d3bafd | 679 | |
99d35a0e DH |
680 | if (dma_q->current_field == 2) { |
681 | /* Populate the second half of the frame */ | |
682 | offset += (dev->width * 2 * dma_q->lines_per_field); | |
683 | } | |
684 | ||
84b5dbf3 | 685 | /* prepare destination address */ |
e0d3bafd SD |
686 | startwrite = p_out_buffer + offset; |
687 | ||
cde4362f MCC |
688 | lencopy = dma_q->bytes_left_in_line > bytes_to_copy ? |
689 | bytes_to_copy : dma_q->bytes_left_in_line; | |
e0d3bafd | 690 | |
84b5dbf3 | 691 | memcpy(startwrite, p_buffer, lencopy); |
e0d3bafd | 692 | |
84b5dbf3 | 693 | return 0; |
e0d3bafd SD |
694 | } |
695 | ||
cde4362f MCC |
696 | u8 cx231xx_is_vbi_buffer_done(struct cx231xx *dev, |
697 | struct cx231xx_dmaqueue *dma_q) | |
e0d3bafd | 698 | { |
84b5dbf3 | 699 | u32 height = 0; |
e0d3bafd SD |
700 | |
701 | height = ((dev->norm & V4L2_STD_625_50) ? | |
84b5dbf3 | 702 | PAL_VBI_LINES : NTSC_VBI_LINES); |
99d35a0e DH |
703 | if (dma_q->lines_completed == height && dma_q->current_field == 2) |
704 | return 1; | |
705 | else | |
706 | return 0; | |
e0d3bafd | 707 | } |