Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[linux-2.6.git] / drivers / media / video / cx231xx / cx231xx-core.c
1 /*
2    cx231xx-core.c - driver for Conexant Cx23100/101/102
3                                 USB video capture devices
4
5    Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
6                                 Based on em28xx driver
7
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.
12
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
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21  */
22
23 #include <linux/init.h>
24 #include <linux/list.h>
25 #include <linux/module.h>
26 #include <linux/slab.h>
27 #include <linux/usb.h>
28 #include <linux/vmalloc.h>
29 #include <media/v4l2-common.h>
30
31 #include "cx231xx.h"
32 #include "cx231xx-reg.h"
33
34 /* #define ENABLE_DEBUG_ISOC_FRAMES */
35
36 static unsigned int core_debug;
37 module_param(core_debug, int, 0644);
38 MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
39
40 #define cx231xx_coredbg(fmt, arg...) do {\
41         if (core_debug) \
42                 printk(KERN_INFO "%s %s :"fmt, \
43                          dev->name, __func__ , ##arg); } while (0)
44
45 static unsigned int reg_debug;
46 module_param(reg_debug, int, 0644);
47 MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
48
49 #define cx231xx_regdbg(fmt, arg...) do {\
50         if (reg_debug) \
51                 printk(KERN_INFO "%s %s :"fmt, \
52                          dev->name, __func__ , ##arg); } while (0)
53
54 static int alt = CX231XX_PINOUT;
55 module_param(alt, int, 0644);
56 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
57
58 #define cx231xx_isocdbg(fmt, arg...) do {\
59         if (core_debug) \
60                 printk(KERN_INFO "%s %s :"fmt, \
61                          dev->name, __func__ , ##arg); } while (0)
62
63 /*****************************************************************
64 *             Device control list functions                                      *
65 ******************************************************************/
66
67 static LIST_HEAD(cx231xx_devlist);
68 static DEFINE_MUTEX(cx231xx_devlist_mutex);
69
70 /*
71  * cx231xx_realease_resources()
72  * unregisters the v4l2,i2c and usb devices
73  * called when the device gets disconected or at module unload
74 */
75 void cx231xx_remove_from_devlist(struct cx231xx *dev)
76 {
77         mutex_lock(&cx231xx_devlist_mutex);
78         list_del(&dev->devlist);
79         mutex_unlock(&cx231xx_devlist_mutex);
80 };
81
82 void cx231xx_add_into_devlist(struct cx231xx *dev)
83 {
84         mutex_lock(&cx231xx_devlist_mutex);
85         list_add_tail(&dev->devlist, &cx231xx_devlist);
86         mutex_unlock(&cx231xx_devlist_mutex);
87 };
88
89 static LIST_HEAD(cx231xx_extension_devlist);
90 static DEFINE_MUTEX(cx231xx_extension_devlist_lock);
91
92 int cx231xx_register_extension(struct cx231xx_ops *ops)
93 {
94         struct cx231xx *dev = NULL;
95
96         mutex_lock(&cx231xx_devlist_mutex);
97         mutex_lock(&cx231xx_extension_devlist_lock);
98         list_add_tail(&ops->next, &cx231xx_extension_devlist);
99         list_for_each_entry(dev, &cx231xx_devlist, devlist)
100                 ops->init(dev);
101
102         printk(KERN_INFO DRIVER_NAME ": %s initialized\n", ops->name);
103         mutex_unlock(&cx231xx_extension_devlist_lock);
104         mutex_unlock(&cx231xx_devlist_mutex);
105         return 0;
106 }
107 EXPORT_SYMBOL(cx231xx_register_extension);
108
109 void cx231xx_unregister_extension(struct cx231xx_ops *ops)
110 {
111         struct cx231xx *dev = NULL;
112
113         mutex_lock(&cx231xx_devlist_mutex);
114         list_for_each_entry(dev, &cx231xx_devlist, devlist)
115                 ops->fini(dev);
116
117         mutex_lock(&cx231xx_extension_devlist_lock);
118         printk(KERN_INFO DRIVER_NAME ": %s removed\n", ops->name);
119         list_del(&ops->next);
120         mutex_unlock(&cx231xx_extension_devlist_lock);
121         mutex_unlock(&cx231xx_devlist_mutex);
122 }
123 EXPORT_SYMBOL(cx231xx_unregister_extension);
124
125 void cx231xx_init_extension(struct cx231xx *dev)
126 {
127         struct cx231xx_ops *ops = NULL;
128
129         mutex_lock(&cx231xx_extension_devlist_lock);
130         if (!list_empty(&cx231xx_extension_devlist)) {
131                 list_for_each_entry(ops, &cx231xx_extension_devlist, next) {
132                         if (ops->init)
133                                 ops->init(dev);
134                 }
135         }
136         mutex_unlock(&cx231xx_extension_devlist_lock);
137 }
138
139 void cx231xx_close_extension(struct cx231xx *dev)
140 {
141         struct cx231xx_ops *ops = NULL;
142
143         mutex_lock(&cx231xx_extension_devlist_lock);
144         if (!list_empty(&cx231xx_extension_devlist)) {
145                 list_for_each_entry(ops, &cx231xx_extension_devlist, next) {
146                         if (ops->fini)
147                                 ops->fini(dev);
148                 }
149         }
150         mutex_unlock(&cx231xx_extension_devlist_lock);
151 }
152
153 /****************************************************************
154 *               U S B related functions                         *
155 *****************************************************************/
156 int cx231xx_send_usb_command(struct cx231xx_i2c *i2c_bus,
157                              struct cx231xx_i2c_xfer_data *req_data)
158 {
159         int status = 0;
160         struct cx231xx *dev = i2c_bus->dev;
161         struct VENDOR_REQUEST_IN ven_req;
162
163         u8 saddr_len = 0;
164         u8 _i2c_period = 0;
165         u8 _i2c_nostop = 0;
166         u8 _i2c_reserve = 0;
167
168         /* Get the I2C period, nostop and reserve parameters */
169         _i2c_period = i2c_bus->i2c_period;
170         _i2c_nostop = i2c_bus->i2c_nostop;
171         _i2c_reserve = i2c_bus->i2c_reserve;
172
173         saddr_len = req_data->saddr_len;
174
175         /* Set wValue */
176         if (saddr_len == 1)     /* need check saddr_len == 0  */
177                 ven_req.wValue =
178                     req_data->
179                     dev_addr << 9 | _i2c_period << 4 | saddr_len << 2 |
180                     _i2c_nostop << 1 | I2C_SYNC | _i2c_reserve << 6;
181         else
182                 ven_req.wValue =
183                     req_data->
184                     dev_addr << 9 | _i2c_period << 4 | saddr_len << 2 |
185                     _i2c_nostop << 1 | I2C_SYNC | _i2c_reserve << 6;
186
187         /* set channel number */
188         if (req_data->direction & I2C_M_RD) {
189                 /* channel number, for read,spec required channel_num +4 */
190                 ven_req.bRequest = i2c_bus->nr + 4;
191         } else
192                 ven_req.bRequest = i2c_bus->nr; /* channel number,  */
193
194         /* set index value */
195         switch (saddr_len) {
196         case 0:
197                 ven_req.wIndex = 0;     /* need check */
198                 break;
199         case 1:
200                 ven_req.wIndex = (req_data->saddr_dat & 0xff);
201                 break;
202         case 2:
203                 ven_req.wIndex = req_data->saddr_dat;
204                 break;
205         }
206
207         /* set wLength value */
208         ven_req.wLength = req_data->buf_size;
209
210         /* set bData value */
211         ven_req.bData = 0;
212
213         /* set the direction */
214         if (req_data->direction) {
215                 ven_req.direction = USB_DIR_IN;
216                 memset(req_data->p_buffer, 0x00, ven_req.wLength);
217         } else
218                 ven_req.direction = USB_DIR_OUT;
219
220         /* set the buffer for read / write */
221         ven_req.pBuff = req_data->p_buffer;
222
223
224         /* call common vendor command request */
225         status = cx231xx_send_vendor_cmd(dev, &ven_req);
226         if (status < 0) {
227                 cx231xx_info
228                     ("UsbInterface::sendCommand, failed with status -%d\n",
229                      status);
230         }
231
232         return status;
233 }
234 EXPORT_SYMBOL_GPL(cx231xx_send_usb_command);
235
236 /*
237  * cx231xx_read_ctrl_reg()
238  * reads data from the usb device specifying bRequest and wValue
239  */
240 int cx231xx_read_ctrl_reg(struct cx231xx *dev, u8 req, u16 reg,
241                           char *buf, int len)
242 {
243         u8 val = 0;
244         int ret;
245         int pipe = usb_rcvctrlpipe(dev->udev, 0);
246
247         if (dev->state & DEV_DISCONNECTED)
248                 return -ENODEV;
249
250         if (len > URB_MAX_CTRL_SIZE)
251                 return -EINVAL;
252
253         switch (len) {
254         case 1:
255                 val = ENABLE_ONE_BYTE;
256                 break;
257         case 2:
258                 val = ENABLE_TWE_BYTE;
259                 break;
260         case 3:
261                 val = ENABLE_THREE_BYTE;
262                 break;
263         case 4:
264                 val = ENABLE_FOUR_BYTE;
265                 break;
266         default:
267                 val = 0xFF;     /* invalid option */
268         }
269
270         if (val == 0xFF)
271                 return -EINVAL;
272
273         if (reg_debug) {
274                 cx231xx_isocdbg("(pipe 0x%08x): "
275                                 "IN:  %02x %02x %02x %02x %02x %02x %02x %02x ",
276                                 pipe,
277                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
278                                 req, 0, val,
279                                 reg & 0xff, reg >> 8, len & 0xff, len >> 8);
280         }
281
282         mutex_lock(&dev->ctrl_urb_lock);
283         ret = usb_control_msg(dev->udev, pipe, req,
284                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
285                               val, reg, dev->urb_buf, len, HZ);
286         if (ret < 0) {
287                 cx231xx_isocdbg(" failed!\n");
288                 /* mutex_unlock(&dev->ctrl_urb_lock); */
289                 return ret;
290         }
291
292         if (len)
293                 memcpy(buf, dev->urb_buf, len);
294
295         mutex_unlock(&dev->ctrl_urb_lock);
296
297         if (reg_debug) {
298                 int byte;
299
300                 cx231xx_isocdbg("<<<");
301                 for (byte = 0; byte < len; byte++)
302                         cx231xx_isocdbg(" %02x", (unsigned char)buf[byte]);
303                 cx231xx_isocdbg("\n");
304         }
305
306         return ret;
307 }
308
309 int cx231xx_send_vendor_cmd(struct cx231xx *dev,
310                                 struct VENDOR_REQUEST_IN *ven_req)
311 {
312         int ret;
313         int pipe = 0;
314
315         if (dev->state & DEV_DISCONNECTED)
316                 return -ENODEV;
317
318         if ((ven_req->wLength > URB_MAX_CTRL_SIZE))
319                 return -EINVAL;
320
321         if (ven_req->direction)
322                 pipe = usb_rcvctrlpipe(dev->udev, 0);
323         else
324                 pipe = usb_sndctrlpipe(dev->udev, 0);
325
326         if (reg_debug) {
327                 int byte;
328
329                 cx231xx_isocdbg("(pipe 0x%08x): "
330                                 "OUT: %02x %02x %02x %04x %04x %04x >>>",
331                                 pipe,
332                                 ven_req->
333                                 direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
334                                 ven_req->bRequest, 0, ven_req->wValue,
335                                 ven_req->wIndex, ven_req->wLength);
336
337                 for (byte = 0; byte < ven_req->wLength; byte++)
338                         cx231xx_isocdbg(" %02x",
339                                         (unsigned char)ven_req->pBuff[byte]);
340                 cx231xx_isocdbg("\n");
341         }
342
343         mutex_lock(&dev->ctrl_urb_lock);
344         ret = usb_control_msg(dev->udev, pipe, ven_req->bRequest,
345                               ven_req->
346                               direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
347                               ven_req->wValue, ven_req->wIndex, ven_req->pBuff,
348                               ven_req->wLength, HZ);
349         mutex_unlock(&dev->ctrl_urb_lock);
350
351         return ret;
352 }
353
354 /*
355  * cx231xx_write_ctrl_reg()
356  * sends data to the usb device, specifying bRequest
357  */
358 int cx231xx_write_ctrl_reg(struct cx231xx *dev, u8 req, u16 reg, char *buf,
359                            int len)
360 {
361         u8 val = 0;
362         int ret;
363         int pipe = usb_sndctrlpipe(dev->udev, 0);
364
365         if (dev->state & DEV_DISCONNECTED)
366                 return -ENODEV;
367
368         if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
369                 return -EINVAL;
370
371         switch (len) {
372         case 1:
373                 val = ENABLE_ONE_BYTE;
374                 break;
375         case 2:
376                 val = ENABLE_TWE_BYTE;
377                 break;
378         case 3:
379                 val = ENABLE_THREE_BYTE;
380                 break;
381         case 4:
382                 val = ENABLE_FOUR_BYTE;
383                 break;
384         default:
385                 val = 0xFF;     /* invalid option */
386         }
387
388         if (val == 0xFF)
389                 return -EINVAL;
390
391         if (reg_debug) {
392                 int byte;
393
394                 cx231xx_isocdbg("(pipe 0x%08x): "
395                         "OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>>",
396                         pipe,
397                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
398                         req, 0, val, reg & 0xff,
399                         reg >> 8, len & 0xff, len >> 8);
400
401                 for (byte = 0; byte < len; byte++)
402                         cx231xx_isocdbg(" %02x", (unsigned char)buf[byte]);
403                 cx231xx_isocdbg("\n");
404         }
405
406         mutex_lock(&dev->ctrl_urb_lock);
407         memcpy(dev->urb_buf, buf, len);
408         ret = usb_control_msg(dev->udev, pipe, req,
409                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
410                               val, reg, dev->urb_buf, len, HZ);
411         mutex_unlock(&dev->ctrl_urb_lock);
412
413         return ret;
414 }
415
416 /****************************************************************
417 *           USB Alternate Setting functions                     *
418 *****************************************************************/
419
420 int cx231xx_set_video_alternate(struct cx231xx *dev)
421 {
422         int errCode, prev_alt = dev->video_mode.alt;
423         unsigned int min_pkt_size = dev->width * 2 + 4;
424         u32 usb_interface_index = 0;
425
426         /* When image size is bigger than a certain value,
427            the frame size should be increased, otherwise, only
428            green screen will be received.
429          */
430         if (dev->width * 2 * dev->height > 720 * 240 * 2)
431                 min_pkt_size *= 2;
432
433         if (dev->width > 360) {
434                 /* resolutions: 720,704,640 */
435                 dev->video_mode.alt = 3;
436         } else if (dev->width > 180) {
437                 /* resolutions: 360,352,320,240 */
438                 dev->video_mode.alt = 2;
439         } else if (dev->width > 0) {
440                 /* resolutions: 180,176,160,128,88 */
441                 dev->video_mode.alt = 1;
442         } else {
443                 /* Change to alt0 BULK to release USB bandwidth */
444                 dev->video_mode.alt = 0;
445         }
446
447         /* Get the correct video interface Index */
448         usb_interface_index =
449             dev->current_pcb_config.hs_config_info[0].interface_info.
450             video_index + 1;
451
452         if (dev->video_mode.alt != prev_alt) {
453                 cx231xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
454                                 min_pkt_size, dev->video_mode.alt);
455                 dev->video_mode.max_pkt_size =
456                     dev->video_mode.alt_max_pkt_size[dev->video_mode.alt];
457                 cx231xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
458                                 dev->video_mode.alt,
459                                 dev->video_mode.max_pkt_size);
460                 cx231xx_info
461                     (" setting alt %d with wMaxPktSize=%u , Interface = %d\n",
462                      dev->video_mode.alt, dev->video_mode.max_pkt_size,
463                      usb_interface_index);
464                 errCode =
465                     usb_set_interface(dev->udev, usb_interface_index,
466                                       dev->video_mode.alt);
467                 if (errCode < 0) {
468                         cx231xx_errdev
469                             ("cannot change alt number to %d (error=%i)\n",
470                              dev->video_mode.alt, errCode);
471                         return errCode;
472                 }
473         }
474         return 0;
475 }
476
477 int cx231xx_set_alt_setting(struct cx231xx *dev, u8 index, u8 alt)
478 {
479         int status = 0;
480         u32 usb_interface_index = 0;
481         u32 max_pkt_size = 0;
482
483         switch (index) {
484         case INDEX_TS1:
485                 usb_interface_index =
486                     dev->current_pcb_config.hs_config_info[0].interface_info.
487                     ts1_index + 1;
488                 dev->video_mode.alt = alt;
489                 if (dev->ts1_mode.alt_max_pkt_size != NULL)
490                         max_pkt_size = dev->ts1_mode.max_pkt_size =
491                             dev->ts1_mode.alt_max_pkt_size[dev->ts1_mode.alt];
492                 break;
493         case INDEX_TS2:
494                 usb_interface_index =
495                     dev->current_pcb_config.hs_config_info[0].interface_info.
496                     ts2_index + 1;
497                 break;
498         case INDEX_AUDIO:
499                 usb_interface_index =
500                     dev->current_pcb_config.hs_config_info[0].interface_info.
501                     audio_index + 1;
502                 dev->adev.alt = alt;
503                 if (dev->adev.alt_max_pkt_size != NULL)
504                         max_pkt_size = dev->adev.max_pkt_size =
505                             dev->adev.alt_max_pkt_size[dev->adev.alt];
506                 break;
507         case INDEX_VIDEO:
508                 usb_interface_index =
509                     dev->current_pcb_config.hs_config_info[0].interface_info.
510                     video_index + 1;
511                 dev->video_mode.alt = alt;
512                 if (dev->video_mode.alt_max_pkt_size != NULL)
513                         max_pkt_size = dev->video_mode.max_pkt_size =
514                             dev->video_mode.alt_max_pkt_size[dev->video_mode.
515                                                              alt];
516                 break;
517         case INDEX_VANC:
518                 usb_interface_index =
519                     dev->current_pcb_config.hs_config_info[0].interface_info.
520                     vanc_index + 1;
521                 dev->vbi_mode.alt = alt;
522                 if (dev->vbi_mode.alt_max_pkt_size != NULL)
523                         max_pkt_size = dev->vbi_mode.max_pkt_size =
524                             dev->vbi_mode.alt_max_pkt_size[dev->vbi_mode.alt];
525                 break;
526         case INDEX_HANC:
527                 usb_interface_index =
528                     dev->current_pcb_config.hs_config_info[0].interface_info.
529                     hanc_index + 1;
530                 dev->sliced_cc_mode.alt = alt;
531                 if (dev->sliced_cc_mode.alt_max_pkt_size != NULL)
532                         max_pkt_size = dev->sliced_cc_mode.max_pkt_size =
533                             dev->sliced_cc_mode.alt_max_pkt_size[dev->
534                                                                  sliced_cc_mode.
535                                                                  alt];
536                 break;
537         default:
538                 break;
539         }
540
541         if (alt > 0 && max_pkt_size == 0) {
542                 cx231xx_errdev
543                 ("can't change interface %d alt no. to %d: Max. Pkt size = 0\n",
544                 usb_interface_index, alt);
545                 return -1;
546         }
547
548         cx231xx_info
549             (" setting alternate %d with wMaxPacketSize=%u , Interface = %d\n",
550              alt, max_pkt_size, usb_interface_index);
551
552         if (usb_interface_index > 0) {
553                 status = usb_set_interface(dev->udev, usb_interface_index, alt);
554                 if (status < 0) {
555                         cx231xx_errdev
556                         ("can't change interface %d alt no. to %d (err=%i)\n",
557                         usb_interface_index, alt, status);
558                         return status;
559                 }
560         }
561
562         return status;
563 }
564 EXPORT_SYMBOL_GPL(cx231xx_set_alt_setting);
565
566 int cx231xx_gpio_set(struct cx231xx *dev, struct cx231xx_reg_seq *gpio)
567 {
568         int rc = 0;
569
570         if (!gpio)
571                 return rc;
572
573         /* Send GPIO reset sequences specified at board entry */
574         while (gpio->sleep >= 0) {
575                 rc = cx231xx_set_gpio_value(dev, gpio->bit, gpio->val);
576                 if (rc < 0)
577                         return rc;
578
579                 if (gpio->sleep > 0)
580                         msleep(gpio->sleep);
581
582                 gpio++;
583         }
584         return rc;
585 }
586
587 int cx231xx_set_mode(struct cx231xx *dev, enum cx231xx_mode set_mode)
588 {
589         if (dev->mode == set_mode)
590                 return 0;
591
592         if (set_mode == CX231XX_SUSPEND) {
593                 /* Set the chip in power saving mode */
594                 dev->mode = set_mode;
595         }
596
597         /* Resource is locked */
598         if (dev->mode != CX231XX_SUSPEND)
599                 return -EINVAL;
600
601         dev->mode = set_mode;
602
603         if (dev->mode == CX231XX_DIGITAL_MODE)
604                 ;/* Set Digital power mode */
605         else
606                 ;/* Set Analog Power mode */
607
608         return 0;
609 }
610 EXPORT_SYMBOL_GPL(cx231xx_set_mode);
611
612 /*****************************************************************
613 *                URB Streaming functions                         *
614 ******************************************************************/
615
616 /*
617  * IRQ callback, called by URB callback
618  */
619 static void cx231xx_irq_callback(struct urb *urb)
620 {
621         struct cx231xx_dmaqueue *dma_q = urb->context;
622         struct cx231xx_video_mode *vmode =
623             container_of(dma_q, struct cx231xx_video_mode, vidq);
624         struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
625         int rc, i;
626
627         switch (urb->status) {
628         case 0:         /* success */
629         case -ETIMEDOUT:        /* NAK */
630                 break;
631         case -ECONNRESET:       /* kill */
632         case -ENOENT:
633         case -ESHUTDOWN:
634                 return;
635         default:                /* error */
636                 cx231xx_isocdbg("urb completition error %d.\n", urb->status);
637                 break;
638         }
639
640         /* Copy data from URB */
641         spin_lock(&dev->video_mode.slock);
642         rc = dev->video_mode.isoc_ctl.isoc_copy(dev, urb);
643         spin_unlock(&dev->video_mode.slock);
644
645         /* Reset urb buffers */
646         for (i = 0; i < urb->number_of_packets; i++) {
647                 urb->iso_frame_desc[i].status = 0;
648                 urb->iso_frame_desc[i].actual_length = 0;
649         }
650         urb->status = 0;
651
652         urb->status = usb_submit_urb(urb, GFP_ATOMIC);
653         if (urb->status) {
654                 cx231xx_isocdbg("urb resubmit failed (error=%i)\n",
655                                 urb->status);
656         }
657 }
658
659 /*
660  * Stop and Deallocate URBs
661  */
662 void cx231xx_uninit_isoc(struct cx231xx *dev)
663 {
664         struct urb *urb;
665         int i;
666
667         cx231xx_isocdbg("cx231xx: called cx231xx_uninit_isoc\n");
668
669         dev->video_mode.isoc_ctl.nfields = -1;
670         for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
671                 urb = dev->video_mode.isoc_ctl.urb[i];
672                 if (urb) {
673                         if (!irqs_disabled())
674                                 usb_kill_urb(urb);
675                         else
676                                 usb_unlink_urb(urb);
677
678                         if (dev->video_mode.isoc_ctl.transfer_buffer[i]) {
679                                 usb_free_coherent(dev->udev,
680                                                   urb->transfer_buffer_length,
681                                                   dev->video_mode.isoc_ctl.
682                                                   transfer_buffer[i],
683                                                   urb->transfer_dma);
684                         }
685                         usb_free_urb(urb);
686                         dev->video_mode.isoc_ctl.urb[i] = NULL;
687                 }
688                 dev->video_mode.isoc_ctl.transfer_buffer[i] = NULL;
689         }
690
691         kfree(dev->video_mode.isoc_ctl.urb);
692         kfree(dev->video_mode.isoc_ctl.transfer_buffer);
693
694         dev->video_mode.isoc_ctl.urb = NULL;
695         dev->video_mode.isoc_ctl.transfer_buffer = NULL;
696         dev->video_mode.isoc_ctl.num_bufs = 0;
697
698         cx231xx_capture_start(dev, 0, Raw_Video);
699 }
700 EXPORT_SYMBOL_GPL(cx231xx_uninit_isoc);
701
702 /*
703  * Allocate URBs and start IRQ
704  */
705 int cx231xx_init_isoc(struct cx231xx *dev, int max_packets,
706                       int num_bufs, int max_pkt_size,
707                       int (*isoc_copy) (struct cx231xx *dev, struct urb *urb))
708 {
709         struct cx231xx_dmaqueue *dma_q = &dev->video_mode.vidq;
710         int i;
711         int sb_size, pipe;
712         struct urb *urb;
713         int j, k;
714         int rc;
715
716         cx231xx_isocdbg("cx231xx: called cx231xx_prepare_isoc\n");
717
718         dev->video_input = dev->video_input > 2 ? 2 : dev->video_input;
719
720         cx231xx_info("Setting Video mux to %d\n", dev->video_input);
721         video_mux(dev, dev->video_input);
722
723         /* De-allocates all pending stuff */
724         cx231xx_uninit_isoc(dev);
725
726         dev->video_mode.isoc_ctl.isoc_copy = isoc_copy;
727         dev->video_mode.isoc_ctl.num_bufs = num_bufs;
728         dma_q->pos = 0;
729         dma_q->is_partial_line = 0;
730         dma_q->last_sav = 0;
731         dma_q->current_field = -1;
732         dma_q->field1_done = 0;
733         dma_q->lines_per_field = dev->height / 2;
734         dma_q->bytes_left_in_line = dev->width << 1;
735         dma_q->lines_completed = 0;
736         for (i = 0; i < 8; i++)
737                 dma_q->partial_buf[i] = 0;
738
739         dev->video_mode.isoc_ctl.urb =
740             kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
741         if (!dev->video_mode.isoc_ctl.urb) {
742                 cx231xx_errdev("cannot alloc memory for usb buffers\n");
743                 return -ENOMEM;
744         }
745
746         dev->video_mode.isoc_ctl.transfer_buffer =
747             kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
748         if (!dev->video_mode.isoc_ctl.transfer_buffer) {
749                 cx231xx_errdev("cannot allocate memory for usbtransfer\n");
750                 kfree(dev->video_mode.isoc_ctl.urb);
751                 return -ENOMEM;
752         }
753
754         dev->video_mode.isoc_ctl.max_pkt_size = max_pkt_size;
755         dev->video_mode.isoc_ctl.buf = NULL;
756
757         sb_size = max_packets * dev->video_mode.isoc_ctl.max_pkt_size;
758
759         /* allocate urbs and transfer buffers */
760         for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
761                 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
762                 if (!urb) {
763                         cx231xx_err("cannot alloc isoc_ctl.urb %i\n", i);
764                         cx231xx_uninit_isoc(dev);
765                         return -ENOMEM;
766                 }
767                 dev->video_mode.isoc_ctl.urb[i] = urb;
768
769                 dev->video_mode.isoc_ctl.transfer_buffer[i] =
770                     usb_alloc_coherent(dev->udev, sb_size, GFP_KERNEL,
771                                        &urb->transfer_dma);
772                 if (!dev->video_mode.isoc_ctl.transfer_buffer[i]) {
773                         cx231xx_err("unable to allocate %i bytes for transfer"
774                                     " buffer %i%s\n",
775                                     sb_size, i,
776                                     in_interrupt() ? " while in int" : "");
777                         cx231xx_uninit_isoc(dev);
778                         return -ENOMEM;
779                 }
780                 memset(dev->video_mode.isoc_ctl.transfer_buffer[i], 0, sb_size);
781
782                 pipe =
783                     usb_rcvisocpipe(dev->udev, dev->video_mode.end_point_addr);
784
785                 usb_fill_int_urb(urb, dev->udev, pipe,
786                                  dev->video_mode.isoc_ctl.transfer_buffer[i],
787                                  sb_size, cx231xx_irq_callback, dma_q, 1);
788
789                 urb->number_of_packets = max_packets;
790                 urb->transfer_flags = URB_ISO_ASAP;
791
792                 k = 0;
793                 for (j = 0; j < max_packets; j++) {
794                         urb->iso_frame_desc[j].offset = k;
795                         urb->iso_frame_desc[j].length =
796                             dev->video_mode.isoc_ctl.max_pkt_size;
797                         k += dev->video_mode.isoc_ctl.max_pkt_size;
798                 }
799         }
800
801         init_waitqueue_head(&dma_q->wq);
802
803         /* submit urbs and enables IRQ */
804         for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
805                 rc = usb_submit_urb(dev->video_mode.isoc_ctl.urb[i],
806                                     GFP_ATOMIC);
807                 if (rc) {
808                         cx231xx_err("submit of urb %i failed (error=%i)\n", i,
809                                     rc);
810                         cx231xx_uninit_isoc(dev);
811                         return rc;
812                 }
813         }
814
815         cx231xx_capture_start(dev, 1, Raw_Video);
816
817         return 0;
818 }
819 EXPORT_SYMBOL_GPL(cx231xx_init_isoc);
820
821 /*****************************************************************
822 *             Device Init/UnInit functions                       *
823 ******************************************************************/
824 int cx231xx_dev_init(struct cx231xx *dev)
825 {
826         int errCode = 0;
827
828         /* Initialize I2C bus */
829
830         /* External Master 1 Bus */
831         dev->i2c_bus[0].nr = 0;
832         dev->i2c_bus[0].dev = dev;
833         dev->i2c_bus[0].i2c_period = I2C_SPEED_1M;      /* 1MHz */
834         dev->i2c_bus[0].i2c_nostop = 0;
835         dev->i2c_bus[0].i2c_reserve = 0;
836
837         /* External Master 2 Bus */
838         dev->i2c_bus[1].nr = 1;
839         dev->i2c_bus[1].dev = dev;
840         dev->i2c_bus[1].i2c_period = I2C_SPEED_1M;      /* 1MHz */
841         dev->i2c_bus[1].i2c_nostop = 0;
842         dev->i2c_bus[1].i2c_reserve = 0;
843
844         /* Internal Master 3 Bus */
845         dev->i2c_bus[2].nr = 2;
846         dev->i2c_bus[2].dev = dev;
847         dev->i2c_bus[2].i2c_period = I2C_SPEED_400K;    /* 400kHz */
848         dev->i2c_bus[2].i2c_nostop = 0;
849         dev->i2c_bus[2].i2c_reserve = 0;
850
851         /* register I2C buses */
852         cx231xx_i2c_register(&dev->i2c_bus[0]);
853         cx231xx_i2c_register(&dev->i2c_bus[1]);
854         cx231xx_i2c_register(&dev->i2c_bus[2]);
855
856         /* init hardware */
857         /* Note : with out calling set power mode function,
858         afe can not be set up correctly */
859         errCode = cx231xx_set_power_mode(dev, POLARIS_AVMODE_ANALOGT_TV);
860         if (errCode < 0) {
861                 cx231xx_errdev
862                     ("%s: Failed to set Power - errCode [%d]!\n",
863                      __func__, errCode);
864                 return errCode;
865         }
866
867         /* initialize Colibri block */
868         errCode = cx231xx_afe_init_super_block(dev, 0x23c);
869         if (errCode < 0) {
870                 cx231xx_errdev
871                     ("%s: cx231xx_afe init super block - errCode [%d]!\n",
872                      __func__, errCode);
873                 return errCode;
874         }
875         errCode = cx231xx_afe_init_channels(dev);
876         if (errCode < 0) {
877                 cx231xx_errdev
878                     ("%s: cx231xx_afe init channels - errCode [%d]!\n",
879                      __func__, errCode);
880                 return errCode;
881         }
882
883         /* Set DIF in By pass mode */
884         errCode = cx231xx_dif_set_standard(dev, DIF_USE_BASEBAND);
885         if (errCode < 0) {
886                 cx231xx_errdev
887                     ("%s: cx231xx_dif set to By pass mode - errCode [%d]!\n",
888                      __func__, errCode);
889                 return errCode;
890         }
891
892         /* I2S block related functions */
893         errCode = cx231xx_i2s_blk_initialize(dev);
894         if (errCode < 0) {
895                 cx231xx_errdev
896                     ("%s: cx231xx_i2s block initialize - errCode [%d]!\n",
897                      __func__, errCode);
898                 return errCode;
899         }
900
901         /* init control pins */
902         errCode = cx231xx_init_ctrl_pin_status(dev);
903         if (errCode < 0) {
904                 cx231xx_errdev("%s: cx231xx_init ctrl pins - errCode [%d]!\n",
905                                __func__, errCode);
906                 return errCode;
907         }
908
909         /* set AGC mode to Analog */
910         errCode = cx231xx_set_agc_analog_digital_mux_select(dev, 1);
911         if (errCode < 0) {
912                 cx231xx_errdev
913                     ("%s: cx231xx_AGC mode to Analog - errCode [%d]!\n",
914                      __func__, errCode);
915                 return errCode;
916         }
917
918         /* set all alternate settings to zero initially */
919         cx231xx_set_alt_setting(dev, INDEX_VIDEO, 0);
920         cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
921         cx231xx_set_alt_setting(dev, INDEX_HANC, 0);
922         if (dev->board.has_dvb)
923                 cx231xx_set_alt_setting(dev, INDEX_TS1, 0);
924
925         /* set the I2C master port to 3 on channel 1 */
926         errCode = cx231xx_enable_i2c_for_tuner(dev, I2C_3);
927
928         return errCode;
929 }
930 EXPORT_SYMBOL_GPL(cx231xx_dev_init);
931
932 void cx231xx_dev_uninit(struct cx231xx *dev)
933 {
934         /* Un Initialize I2C bus */
935         cx231xx_i2c_unregister(&dev->i2c_bus[2]);
936         cx231xx_i2c_unregister(&dev->i2c_bus[1]);
937         cx231xx_i2c_unregister(&dev->i2c_bus[0]);
938 }
939 EXPORT_SYMBOL_GPL(cx231xx_dev_uninit);
940
941 /*****************************************************************
942 *              G P I O related functions                         *
943 ******************************************************************/
944 int cx231xx_send_gpio_cmd(struct cx231xx *dev, u32 gpio_bit, u8 * gpio_val,
945                           u8 len, u8 request, u8 direction)
946 {
947         int status = 0;
948         struct VENDOR_REQUEST_IN ven_req;
949
950         /* Set wValue */
951         ven_req.wValue = (u16) (gpio_bit >> 16 & 0xffff);
952
953         /* set request */
954         if (!request) {
955                 if (direction)
956                         ven_req.bRequest = VRT_GET_GPIO;        /* 0x8 gpio */
957                 else
958                         ven_req.bRequest = VRT_SET_GPIO;        /* 0x9 gpio */
959         } else {
960                 if (direction)
961                         ven_req.bRequest = VRT_GET_GPIE;        /* 0xa gpie */
962                 else
963                         ven_req.bRequest = VRT_SET_GPIE;        /* 0xb gpie */
964         }
965
966         /* set index value */
967         ven_req.wIndex = (u16) (gpio_bit & 0xffff);
968
969         /* set wLength value */
970         ven_req.wLength = len;
971
972         /* set bData value */
973         ven_req.bData = 0;
974
975         /* set the buffer for read / write */
976         ven_req.pBuff = gpio_val;
977
978         /* set the direction */
979         if (direction) {
980                 ven_req.direction = USB_DIR_IN;
981                 memset(ven_req.pBuff, 0x00, ven_req.wLength);
982         } else
983                 ven_req.direction = USB_DIR_OUT;
984
985
986         /* call common vendor command request */
987         status = cx231xx_send_vendor_cmd(dev, &ven_req);
988         if (status < 0) {
989                 cx231xx_info
990                     ("UsbInterface::sendCommand, failed with status -%d\n",
991                      status);
992         }
993
994         return status;
995 }
996 EXPORT_SYMBOL_GPL(cx231xx_send_gpio_cmd);
997
998 /*****************************************************************
999  *    C O N T R O L - Register R E A D / W R I T E functions     *
1000  *****************************************************************/
1001 int cx231xx_mode_register(struct cx231xx *dev, u16 address, u32 mode)
1002 {
1003         u8 value[4] = { 0x0, 0x0, 0x0, 0x0 };
1004         u32 tmp = 0;
1005         int status = 0;
1006
1007         status =
1008             cx231xx_read_ctrl_reg(dev, VRT_GET_REGISTER, address, value, 4);
1009         if (status < 0)
1010                 return status;
1011
1012         tmp = *((u32 *) value);
1013         tmp |= mode;
1014
1015         value[0] = (u8) tmp;
1016         value[1] = (u8) (tmp >> 8);
1017         value[2] = (u8) (tmp >> 16);
1018         value[3] = (u8) (tmp >> 24);
1019
1020         status =
1021             cx231xx_write_ctrl_reg(dev, VRT_SET_REGISTER, address, value, 4);
1022
1023         return status;
1024 }
1025
1026 /*****************************************************************
1027  *            I 2 C Internal C O N T R O L   functions           *
1028  *****************************************************************/
1029 int cx231xx_read_i2c_data(struct cx231xx *dev, u8 dev_addr, u16 saddr,
1030                           u8 saddr_len, u32 *data, u8 data_len)
1031 {
1032         int status = 0;
1033         struct cx231xx_i2c_xfer_data req_data;
1034         u8 value[4] = { 0, 0, 0, 0 };
1035
1036         if (saddr_len == 0)
1037                 saddr = 0;
1038         else if (saddr_len == 0)
1039                 saddr &= 0xff;
1040
1041         /* prepare xfer_data struct */
1042         req_data.dev_addr = dev_addr >> 1;
1043         req_data.direction = I2C_M_RD;
1044         req_data.saddr_len = saddr_len;
1045         req_data.saddr_dat = saddr;
1046         req_data.buf_size = data_len;
1047         req_data.p_buffer = (u8 *) value;
1048
1049         /* usb send command */
1050         status = dev->cx231xx_send_usb_command(&dev->i2c_bus[0], &req_data);
1051
1052         if (status >= 0) {
1053                 /* Copy the data read back to main buffer */
1054                 if (data_len == 1)
1055                         *data = value[0];
1056                 else
1057                         *data =
1058                             value[0] | value[1] << 8 | value[2] << 16 | value[3]
1059                             << 24;
1060         }
1061
1062         return status;
1063 }
1064
1065 int cx231xx_write_i2c_data(struct cx231xx *dev, u8 dev_addr, u16 saddr,
1066                            u8 saddr_len, u32 data, u8 data_len)
1067 {
1068         int status = 0;
1069         u8 value[4] = { 0, 0, 0, 0 };
1070         struct cx231xx_i2c_xfer_data req_data;
1071
1072         value[0] = (u8) data;
1073         value[1] = (u8) (data >> 8);
1074         value[2] = (u8) (data >> 16);
1075         value[3] = (u8) (data >> 24);
1076
1077         if (saddr_len == 0)
1078                 saddr = 0;
1079         else if (saddr_len == 0)
1080                 saddr &= 0xff;
1081
1082         /* prepare xfer_data struct */
1083         req_data.dev_addr = dev_addr >> 1;
1084         req_data.direction = 0;
1085         req_data.saddr_len = saddr_len;
1086         req_data.saddr_dat = saddr;
1087         req_data.buf_size = data_len;
1088         req_data.p_buffer = value;
1089
1090         /* usb send command */
1091         status = dev->cx231xx_send_usb_command(&dev->i2c_bus[0], &req_data);
1092
1093         return status;
1094 }
1095
1096 int cx231xx_reg_mask_write(struct cx231xx *dev, u8 dev_addr, u8 size,
1097                            u16 register_address, u8 bit_start, u8 bit_end,
1098                            u32 value)
1099 {
1100         int status = 0;
1101         u32 tmp;
1102         u32 mask = 0;
1103         int i;
1104
1105         if (bit_start > (size - 1) || bit_end > (size - 1))
1106                 return -1;
1107
1108         if (size == 8) {
1109                 status =
1110                     cx231xx_read_i2c_data(dev, dev_addr, register_address, 2,
1111                                           &tmp, 1);
1112         } else {
1113                 status =
1114                     cx231xx_read_i2c_data(dev, dev_addr, register_address, 2,
1115                                           &tmp, 4);
1116         }
1117
1118         if (status < 0)
1119                 return status;
1120
1121         mask = 1 << bit_end;
1122         for (i = bit_end; i > bit_start && i > 0; i--)
1123                 mask = mask + (1 << (i - 1));
1124
1125         value <<= bit_start;
1126
1127         if (size == 8) {
1128                 tmp &= ~mask;
1129                 tmp |= value;
1130                 tmp &= 0xff;
1131                 status =
1132                     cx231xx_write_i2c_data(dev, dev_addr, register_address, 2,
1133                                            tmp, 1);
1134         } else {
1135                 tmp &= ~mask;
1136                 tmp |= value;
1137                 status =
1138                     cx231xx_write_i2c_data(dev, dev_addr, register_address, 2,
1139                                            tmp, 4);
1140         }
1141
1142         return status;
1143 }
1144
1145 int cx231xx_read_modify_write_i2c_dword(struct cx231xx *dev, u8 dev_addr,
1146                                         u16 saddr, u32 mask, u32 value)
1147 {
1148         u32 temp;
1149         int status = 0;
1150
1151         status = cx231xx_read_i2c_data(dev, dev_addr, saddr, 2, &temp, 4);
1152
1153         if (status < 0)
1154                 return status;
1155
1156         temp &= ~mask;
1157         temp |= value;
1158
1159         status = cx231xx_write_i2c_data(dev, dev_addr, saddr, 2, temp, 4);
1160
1161         return status;
1162 }
1163
1164 u32 cx231xx_set_field(u32 field_mask, u32 data)
1165 {
1166         u32 temp;
1167
1168         for (temp = field_mask; (temp & 1) == 0; temp >>= 1)
1169                 data <<= 1;
1170
1171         return data;
1172 }