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V4L/DVB: tlg2300: make local variables and functions static
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / tlg2300 / pd-main.c
blob832b7c7b13d6a6f74a6a877e33175241efef55d5
1 /*
2 * device driver for Telegent tlg2300 based TV cards
3 *
4 * Author :
5 * Kang Yong <kangyong@telegent.com>
6 * Zhang Xiaobing <xbzhang@telegent.com>
7 * Huang Shijie <zyziii@telegent.com> or <shijie8@gmail.com>
8 *
9 * (c) 2009 Telegent Systems
10 * (c) 2010 Telegent Systems
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27 #include <linux/version.h>
28 #include <linux/kernel.h>
29 #include <linux/errno.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/module.h>
33 #include <linux/kref.h>
34 #include <linux/suspend.h>
35 #include <linux/usb/quirks.h>
36 #include <linux/ctype.h>
37 #include <linux/string.h>
38 #include <linux/types.h>
39 #include <linux/firmware.h>
40 #include <linux/smp_lock.h>
41
42 #include "vendorcmds.h"
43 #include "pd-common.h"
44
45 #define VENDOR_ID 0x1B24
46 #define PRODUCT_ID 0x4001
47 static struct usb_device_id id_table[] = {
48 { USB_DEVICE_AND_INTERFACE_INFO(VENDOR_ID, PRODUCT_ID, 255, 1, 0) },
49 { USB_DEVICE_AND_INTERFACE_INFO(VENDOR_ID, PRODUCT_ID, 255, 1, 1) },
50 { },
51 };
52 MODULE_DEVICE_TABLE(usb, id_table);
53
54 int debug_mode;
55 module_param(debug_mode, int, 0644);
56 MODULE_PARM_DESC(debug_mode, "0 = disable, 1 = enable, 2 = verbose");
57
58 static const char *firmware_name = "tlg2300_firmware.bin";
59 static struct usb_driver poseidon_driver;
60 static LIST_HEAD(pd_device_list);
61
62 /*
63 * send set request to USB firmware.
64 */
65 s32 send_set_req(struct poseidon *pd, u8 cmdid, s32 param, s32 *cmd_status)
66 {
67 s32 ret;
68 s8 data[32] = {};
69 u16 lower_16, upper_16;
70
71 if (pd->state & POSEIDON_STATE_DISCONNECT)
72 return -ENODEV;
73
74 mdelay(30);
75
76 if (param == 0) {
77 upper_16 = lower_16 = 0;
78 } else {
79 /* send 32 bit param as two 16 bit param,little endian */
80 lower_16 = (unsigned short)(param & 0xffff);
81 upper_16 = (unsigned short)((param >> 16) & 0xffff);
82 }
83 ret = usb_control_msg(pd->udev,
84 usb_rcvctrlpipe(pd->udev, 0),
85 REQ_SET_CMD | cmdid,
86 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
87 lower_16,
88 upper_16,
89 &data,
90 sizeof(*cmd_status),
91 USB_CTRL_GET_TIMEOUT);
92
93 if (!ret) {
94 return -ENXIO;
95 } else {
96 /* 1st 4 bytes into cmd_status */
97 memcpy((char *)cmd_status, &(data[0]), sizeof(*cmd_status));
98 }
99 return 0;
100 }
101
102 /*
103 * send get request to Poseidon firmware.
104 */
105 s32 send_get_req(struct poseidon *pd, u8 cmdid, s32 param,
106 void *buf, s32 *cmd_status, s32 datalen)
107 {
108 s32 ret;
109 s8 data[128] = {};
110 u16 lower_16, upper_16;
111
112 if (pd->state & POSEIDON_STATE_DISCONNECT)
113 return -ENODEV;
114
115 mdelay(30);
116 if (param == 0) {
117 upper_16 = lower_16 = 0;
118 } else {
119 /*send 32 bit param as two 16 bit param, little endian */
120 lower_16 = (unsigned short)(param & 0xffff);
121 upper_16 = (unsigned short)((param >> 16) & 0xffff);
122 }
123 ret = usb_control_msg(pd->udev,
124 usb_rcvctrlpipe(pd->udev, 0),
125 REQ_GET_CMD | cmdid,
126 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
127 lower_16,
128 upper_16,
129 &data,
130 (datalen + sizeof(*cmd_status)),
131 USB_CTRL_GET_TIMEOUT);
132
133 if (ret < 0) {
134 return -ENXIO;
135 } else {
136 /* 1st 4 bytes into cmd_status, remaining data into cmd_data */
137 memcpy((char *)cmd_status, &data[0], sizeof(*cmd_status));
138 memcpy((char *)buf, &data[sizeof(*cmd_status)], datalen);
139 }
140 return 0;
141 }
142
143 static int pm_notifier_block(struct notifier_block *nb,
144 unsigned long event, void *dummy)
145 {
146 struct poseidon *pd = NULL;
147 struct list_head *node, *next;
148
149 switch (event) {
150 case PM_POST_HIBERNATION:
151 list_for_each_safe(node, next, &pd_device_list) {
152 struct usb_device *udev;
153 struct usb_interface *iface;
154 int rc = 0;
155
156 pd = container_of(node, struct poseidon, device_list);
157 udev = pd->udev;
158 iface = pd->interface;
159
160 /* It will cause the system to reload the firmware */
161 rc = usb_lock_device_for_reset(udev, iface);
162 if (rc >= 0) {
163 usb_reset_device(udev);
164 usb_unlock_device(udev);
165 }
166 }
167 break;
168 default:
169 break;
170 }
171 log("event :%ld\n", event);
172 return 0;
173 }
174
175 static struct notifier_block pm_notifer = {
176 .notifier_call = pm_notifier_block,
177 };
178
179 int set_tuner_mode(struct poseidon *pd, unsigned char mode)
180 {
181 s32 ret, cmd_status;
182
183 if (pd->state & POSEIDON_STATE_DISCONNECT)
184 return -ENODEV;
185
186 ret = send_set_req(pd, TUNE_MODE_SELECT, mode, &cmd_status);
187 if (ret || cmd_status)
188 return -ENXIO;
189 return 0;
190 }
191
192 void poseidon_delete(struct kref *kref)
193 {
194 struct poseidon *pd = container_of(kref, struct poseidon, kref);
195
196 if (!pd)
197 return;
198 list_del_init(&pd->device_list);
199
200 pd_dvb_usb_device_cleanup(pd);
201 /* clean_audio_data(&pd->audio_data);*/
202
203 if (pd->udev) {
204 usb_put_dev(pd->udev);
205 pd->udev = NULL;
206 }
207 if (pd->interface) {
208 usb_put_intf(pd->interface);
209 pd->interface = NULL;
210 }
211 kfree(pd);
212 log();
213 }
214
215 static int firmware_download(struct usb_device *udev)
216 {
217 int ret = 0, actual_length;
218 const struct firmware *fw = NULL;
219 void *fwbuf = NULL;
220 size_t fwlength = 0, offset;
221 size_t max_packet_size;
222
223 ret = request_firmware(&fw, firmware_name, &udev->dev);
224 if (ret) {
225 log("download err : %d", ret);
226 return ret;
227 }
228
229 fwlength = fw->size;
230
231 fwbuf = kzalloc(fwlength, GFP_KERNEL);
232 if (!fwbuf) {
233 ret = -ENOMEM;
234 goto out;
235 }
236 memcpy(fwbuf, fw->data, fwlength);
237
238 max_packet_size = udev->ep_out[0x1]->desc.wMaxPacketSize;
239 log("\t\t download size : %d", (int)max_packet_size);
240
241 for (offset = 0; offset < fwlength; offset += max_packet_size) {
242 actual_length = 0;
243 ret = usb_bulk_msg(udev,
244 usb_sndbulkpipe(udev, 0x01), /* ep 1 */
245 fwbuf + offset,
246 min(max_packet_size, fwlength - offset),
247 &actual_length,
248 HZ * 10);
249 if (ret)
250 break;
251 }
252 kfree(fwbuf);
253 out:
254 release_firmware(fw);
255 return ret;
256 }
257
258 static inline struct poseidon *get_pd(struct usb_interface *intf)
259 {
260 return usb_get_intfdata(intf);
261 }
262
263 #ifdef CONFIG_PM
264 /* one-to-one map : poseidon{} <----> usb_device{}'s port */
265 static inline void set_map_flags(struct poseidon *pd, struct usb_device *udev)
266 {
267 pd->portnum = udev->portnum;
268 }
269
270 static inline int get_autopm_ref(struct poseidon *pd)
271 {
272 return pd->video_data.users + pd->vbi_data.users + pd->audio.users
273 + atomic_read(&pd->dvb_data.users) + pd->radio_data.users;
274 }
275
276 /* fixup something for poseidon */
277 static inline struct poseidon *fixup(struct poseidon *pd)
278 {
279 int count;
280
281 /* old udev and interface have gone, so put back reference . */
282 count = get_autopm_ref(pd);
283 log("count : %d, ref count : %d", count, get_pm_count(pd));
284 while (count--)
285 usb_autopm_put_interface(pd->interface);
286 /*usb_autopm_set_interface(pd->interface); */
287
288 usb_put_dev(pd->udev);
289 usb_put_intf(pd->interface);
290 log("event : %d\n", pd->msg.event);
291 return pd;
292 }
293
294 static struct poseidon *find_old_poseidon(struct usb_device *udev)
295 {
296 struct poseidon *pd;
297
298 list_for_each_entry(pd, &pd_device_list, device_list) {
299 if (pd->portnum == udev->portnum && in_hibernation(pd))
300 return fixup(pd);
301 }
302 return NULL;
303 }
304
305 /* Is the card working now ? */
306 static inline int is_working(struct poseidon *pd)
307 {
308 return get_pm_count(pd) > 0;
309 }
310
311 static int poseidon_suspend(struct usb_interface *intf, pm_message_t msg)
312 {
313 struct poseidon *pd = get_pd(intf);
314
315 if (!pd)
316 return 0;
317 if (!is_working(pd)) {
318 if (get_pm_count(pd) <= 0 && !in_hibernation(pd)) {
319 pd->msg.event = PM_EVENT_AUTO_SUSPEND;
320 pd->pm_resume = NULL; /* a good guard */
321 printk(KERN_DEBUG "\n\t+ TLG2300 auto suspend +\n\n");
322 }
323 return 0;
324 }
325 pd->msg = msg; /* save it here */
326 logpm(pd);
327 return pd->pm_suspend ? pd->pm_suspend(pd) : 0;
328 }
329
330 static int poseidon_resume(struct usb_interface *intf)
331 {
332 struct poseidon *pd = get_pd(intf);
333
334 if (!pd)
335 return 0;
336 printk(KERN_DEBUG "\n\t ++ TLG2300 resume ++\n\n");
337
338 if (!is_working(pd)) {
339 if (PM_EVENT_AUTO_SUSPEND == pd->msg.event)
340 pd->msg = PMSG_ON;
341 return 0;
342 }
343 if (in_hibernation(pd)) {
344 logpm(pd);
345 return 0;
346 }
347 logpm(pd);
348 return pd->pm_resume ? pd->pm_resume(pd) : 0;
349 }
350
351 static void hibernation_resume(struct work_struct *w)
352 {
353 struct poseidon *pd = container_of(w, struct poseidon, pm_work);
354 int count;
355
356 pd->msg.event = 0; /* clear it here */
357 pd->state &= ~POSEIDON_STATE_DISCONNECT;
358
359 /* set the new interface's reference */
360 count = get_autopm_ref(pd);
361 while (count--)
362 usb_autopm_get_interface(pd->interface);
363
364 /* resume the context */
365 logpm(pd);
366 if (pd->pm_resume)
367 pd->pm_resume(pd);
368 }
369 #else /* CONFIG_PM is not enabled: */
370 static inline struct poseidon *find_old_poseidon(struct usb_device *udev)
371 {
372 return NULL;
373 }
374
375 static inline void set_map_flags(struct poseidon *pd, struct usb_device *udev)
376 {
377 }
378 #endif
379
380 static bool check_firmware(struct usb_device *udev, int *down_firmware)
381 {
382 void *buf;
383 int ret;
384 struct cmd_firmware_vers_s *cmd_firm;
385
386 buf = kzalloc(sizeof(*cmd_firm) + sizeof(u32), GFP_KERNEL);
387 if (!buf)
388 return -ENOMEM;
389 ret = usb_control_msg(udev,
390 usb_rcvctrlpipe(udev, 0),
391 REQ_GET_CMD | GET_FW_ID,
392 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
393 0,
394 0,
395 buf,
396 sizeof(*cmd_firm) + sizeof(u32),
397 USB_CTRL_GET_TIMEOUT);
398 kfree(buf);
399
400 if (ret < 0) {
401 *down_firmware = 1;
402 return firmware_download(udev);
403 }
404 return ret;
405 }
406
407 static int poseidon_probe(struct usb_interface *interface,
408 const struct usb_device_id *id)
409 {
410 struct usb_device *udev = interface_to_usbdev(interface);
411 struct poseidon *pd = NULL;
412 int ret = 0;
413 int new_one = 0;
414
415 /* download firmware */
416 check_firmware(udev, &ret);
417 if (ret)
418 return 0;
419
420 /* Do I recovery from the hibernate ? */
421 pd = find_old_poseidon(udev);
422 if (!pd) {
423 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
424 if (!pd)
425 return -ENOMEM;
426 kref_init(&pd->kref);
427 set_map_flags(pd, udev);
428 new_one = 1;
429 }
430
431 pd->udev = usb_get_dev(udev);
432 pd->interface = usb_get_intf(interface);
433 usb_set_intfdata(interface, pd);
434
435 if (new_one) {
436 struct device *dev = &interface->dev;
437
438 logpm(pd);
439 mutex_init(&pd->lock);
440
441 /* register v4l2 device */
442 snprintf(pd->v4l2_dev.name, sizeof(pd->v4l2_dev.name), "%s %s",
443 dev->driver->name, dev_name(dev));
444 ret = v4l2_device_register(NULL, &pd->v4l2_dev);
445
446 /* register devices in directory /dev */
447 ret = pd_video_init(pd);
448 poseidon_audio_init(pd);
449 poseidon_fm_init(pd);
450 pd_dvb_usb_device_init(pd);
451
452 INIT_LIST_HEAD(&pd->device_list);
453 list_add_tail(&pd->device_list, &pd_device_list);
454 }
455
456 device_init_wakeup(&udev->dev, 1);
457 #ifdef CONFIG_PM
458 pd->udev->autosuspend_disabled = 0;
459 pd->udev->autosuspend_delay = HZ * PM_SUSPEND_DELAY;
460
461 if (in_hibernation(pd)) {
462 INIT_WORK(&pd->pm_work, hibernation_resume);
463 schedule_work(&pd->pm_work);
464 }
465 #endif
466 return 0;
467 }
468
469 static void poseidon_disconnect(struct usb_interface *interface)
470 {
471 struct poseidon *pd = get_pd(interface);
472
473 if (!pd)
474 return;
475 logpm(pd);
476 if (in_hibernation(pd))
477 return;
478
479 mutex_lock(&pd->lock);
480 pd->state |= POSEIDON_STATE_DISCONNECT;
481 mutex_unlock(&pd->lock);
482
483 /* stop urb transferring */
484 stop_all_video_stream(pd);
485 dvb_stop_streaming(&pd->dvb_data);
486
487 /*unregister v4l2 device */
488 v4l2_device_unregister(&pd->v4l2_dev);
489
490 lock_kernel();
491 {
492 pd_dvb_usb_device_exit(pd);
493 poseidon_fm_exit(pd);
494
495 poseidon_audio_free(pd);
496 pd_video_exit(pd);
497 }
498 unlock_kernel();
499
500 usb_set_intfdata(interface, NULL);
501 kref_put(&pd->kref, poseidon_delete);
502 }
503
504 static struct usb_driver poseidon_driver = {
505 .name = "poseidon",
506 .probe = poseidon_probe,
507 .disconnect = poseidon_disconnect,
508 .id_table = id_table,
509 #ifdef CONFIG_PM
510 .suspend = poseidon_suspend,
511 .resume = poseidon_resume,
512 #endif
513 .supports_autosuspend = 1,
514 };
515
516 static int __init poseidon_init(void)
517 {
518 int ret;
519
520 ret = usb_register(&poseidon_driver);
521 if (ret)
522 return ret;
523 register_pm_notifier(&pm_notifer);
524 return ret;
525 }
526
527 static void __exit poseidon_exit(void)
528 {
529 log();
530 unregister_pm_notifier(&pm_notifer);
531 usb_deregister(&poseidon_driver);
532 }
533
534 module_init(poseidon_init);
535 module_exit(poseidon_exit);
536
537 MODULE_AUTHOR("Telegent Systems");
538 MODULE_DESCRIPTION("For tlg2300-based USB device ");
539 MODULE_LICENSE("GPL");
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