[PATCH] DRIVER MODEL: Get rid of the obsolete tri-level suspend/resume callbacks
[linux-2.6.git] / drivers / media / video / tuner-core.c
1 /*
2  *
3  * i2c tv tuner chip device driver
4  * core core, i.e. kernel interfaces, registering and so on
5  */
6
7 #include <linux/module.h>
8 #include <linux/moduleparam.h>
9 #include <linux/kernel.h>
10 #include <linux/sched.h>
11 #include <linux/string.h>
12 #include <linux/timer.h>
13 #include <linux/delay.h>
14 #include <linux/errno.h>
15 #include <linux/slab.h>
16 #include <linux/poll.h>
17 #include <linux/i2c.h>
18 #include <linux/types.h>
19 #include <linux/videodev.h>
20 #include <linux/init.h>
21
22 #include <media/tuner.h>
23 #include <media/audiochip.h>
24
25 #include "msp3400.h"
26
27 #define UNSET (-1U)
28
29 /* standard i2c insmod options */
30 static unsigned short normal_i2c[] = {
31         0x4b,                   /* tda8290 */
32         0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
33         0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
34         I2C_CLIENT_END
35 };
36
37 I2C_CLIENT_INSMOD;
38
39 /* insmod options used at init time => read/only */
40 static unsigned int addr = 0;
41 module_param(addr, int, 0444);
42
43 static unsigned int no_autodetect = 0;
44 module_param(no_autodetect, int, 0444);
45
46 static unsigned int show_i2c = 0;
47 module_param(show_i2c, int, 0444);
48
49 /* insmod options used at runtime => read/write */
50 unsigned int tuner_debug = 0;
51 module_param(tuner_debug, int, 0644);
52
53 static unsigned int tv_range[2] = { 44, 958 };
54 static unsigned int radio_range[2] = { 65, 108 };
55
56 module_param_array(tv_range, int, NULL, 0644);
57 module_param_array(radio_range, int, NULL, 0644);
58
59 MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
60 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
61 MODULE_LICENSE("GPL");
62
63 static struct i2c_driver driver;
64 static struct i2c_client client_template;
65
66 /* ---------------------------------------------------------------------- */
67
68 /* Set tuner frequency,  freq in Units of 62.5kHz = 1/16MHz */
69 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
70 {
71         struct tuner *t = i2c_get_clientdata(c);
72
73         if (t->type == UNSET) {
74                 tuner_warn ("tuner type not set\n");
75                 return;
76         }
77         if (NULL == t->tv_freq) {
78                 tuner_warn ("Tuner has no way to set tv freq\n");
79                 return;
80         }
81         if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
82                 tuner_dbg ("TV freq (%d.%02d) out of range (%d-%d)\n",
83                            freq / 16, freq % 16 * 100 / 16, tv_range[0],
84                            tv_range[1]);
85         }
86         t->tv_freq(c, freq);
87 }
88
89 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
90 {
91         struct tuner *t = i2c_get_clientdata(c);
92
93         if (t->type == UNSET) {
94                 tuner_warn ("tuner type not set\n");
95                 return;
96         }
97         if (NULL == t->radio_freq) {
98                 tuner_warn ("tuner has no way to set radio frequency\n");
99                 return;
100         }
101         if (freq <= radio_range[0] * 16000 || freq >= radio_range[1] * 16000) {
102                 tuner_dbg ("radio freq (%d.%02d) out of range (%d-%d)\n",
103                            freq / 16000, freq % 16000 * 100 / 16000,
104                            radio_range[0], radio_range[1]);
105         }
106
107         t->radio_freq(c, freq);
108         return;
109 }
110
111 static void set_freq(struct i2c_client *c, unsigned long freq)
112 {
113         struct tuner *t = i2c_get_clientdata(c);
114
115         switch (t->mode) {
116         case V4L2_TUNER_RADIO:
117                 tuner_dbg("radio freq set to %lu.%02lu\n",
118                           freq / 16000, freq % 16000 * 100 / 16000);
119                 set_radio_freq(c, freq);
120                 break;
121         case V4L2_TUNER_ANALOG_TV:
122         case V4L2_TUNER_DIGITAL_TV:
123                 tuner_dbg("tv freq set to %lu.%02lu\n",
124                           freq / 16, freq % 16 * 100 / 16);
125                 set_tv_freq(c, freq);
126                 break;
127         }
128         t->freq = freq;
129 }
130
131 static void set_type(struct i2c_client *c, unsigned int type,
132                      unsigned int new_mode_mask)
133 {
134         struct tuner *t = i2c_get_clientdata(c);
135         unsigned char buffer[4];
136
137         if (type == UNSET || type == TUNER_ABSENT) {
138                 tuner_dbg ("tuner 0x%02x: Tuner type absent\n",c->addr);
139                 return;
140         }
141
142         if (type >= tuner_count) {
143                 tuner_warn ("tuner 0x%02x: Tuner count greater than %d\n",c->addr,tuner_count);
144                 return;
145         }
146
147         /* This code detects calls by card attach_inform */
148         if (NULL == t->i2c.dev.driver) {
149                 tuner_dbg ("tuner 0x%02x: called during i2c_client register by adapter's attach_inform\n", c->addr);
150
151                 t->type=type;
152                 return;
153         }
154
155         t->type = type;
156
157         switch (t->type) {
158         case TUNER_MT2032:
159                 microtune_init(c);
160                 break;
161         case TUNER_PHILIPS_TDA8290:
162                 tda8290_init(c);
163                 break;
164         case TUNER_TEA5767:
165                 if (tea5767_tuner_init(c) == EINVAL) {
166                         t->type = TUNER_ABSENT;
167                         t->mode_mask = T_UNINITIALIZED;
168                         return;
169                 }
170                 t->mode_mask = T_RADIO;
171                 break;
172         case TUNER_PHILIPS_FMD1216ME_MK3:
173                 buffer[0] = 0x0b;
174                 buffer[1] = 0xdc;
175                 buffer[2] = 0x9c;
176                 buffer[3] = 0x60;
177                 i2c_master_send(c, buffer, 4);
178                 mdelay(1);
179                 buffer[2] = 0x86;
180                 buffer[3] = 0x54;
181                 i2c_master_send(c, buffer, 4);
182                 default_tuner_init(c);
183                 break;
184         case TUNER_LG_TDVS_H062F:
185                 /* Set the Auxiliary Byte. */
186                 buffer[2] &= ~0x20;
187                 buffer[2] |= 0x18;
188                 buffer[3] = 0x20;
189                 i2c_master_send(c, buffer, 4);
190                 default_tuner_init(c);
191                 break;
192         default:
193                 default_tuner_init(c);
194                 break;
195         }
196
197         if (t->mode_mask == T_UNINITIALIZED)
198                 t->mode_mask = new_mode_mask;
199
200         set_freq(c, t->freq);
201         tuner_dbg("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
202                   c->adapter->name, c->driver->name, c->addr << 1, type,
203                   t->mode_mask);
204 }
205
206 /*
207  * This function apply tuner config to tuner specified
208  * by tun_setup structure. I addr is unset, then admin status
209  * and tun addr status is more precise then current status,
210  * it's applied. Otherwise status and type are applied only to
211  * tuner with exactly the same addr.
212 */
213
214 static void set_addr(struct i2c_client *c, struct tuner_setup *tun_setup)
215 {
216         struct tuner *t = i2c_get_clientdata(c);
217
218         if ((tun_setup->addr == ADDR_UNSET &&
219                 (t->mode_mask & tun_setup->mode_mask)) ||
220                 tun_setup->addr == c->addr) {
221                         set_type(c, tun_setup->type, tun_setup->mode_mask);
222         }
223 }
224
225 static inline int check_mode(struct tuner *t, char *cmd)
226 {
227         if ((1 << t->mode & t->mode_mask) == 0) {
228                 return EINVAL;
229         }
230
231         switch (t->mode) {
232         case V4L2_TUNER_RADIO:
233                 tuner_dbg("Cmd %s accepted for radio\n", cmd);
234                 break;
235         case V4L2_TUNER_ANALOG_TV:
236                 tuner_dbg("Cmd %s accepted for analog TV\n", cmd);
237                 break;
238         case V4L2_TUNER_DIGITAL_TV:
239                 tuner_dbg("Cmd %s accepted for digital TV\n", cmd);
240                 break;
241         }
242         return 0;
243 }
244
245 static char pal[] = "-";
246 module_param_string(pal, pal, sizeof(pal), 0644);
247 static char secam[] = "-";
248 module_param_string(secam, secam, sizeof(secam), 0644);
249
250 /* get more precise norm info from insmod option */
251 static int tuner_fixup_std(struct tuner *t)
252 {
253         if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
254                 switch (pal[0]) {
255                 case 'b':
256                 case 'B':
257                 case 'g':
258                 case 'G':
259                         tuner_dbg ("insmod fixup: PAL => PAL-BG\n");
260                         t->std = V4L2_STD_PAL_BG;
261                         break;
262                 case 'i':
263                 case 'I':
264                         tuner_dbg ("insmod fixup: PAL => PAL-I\n");
265                         t->std = V4L2_STD_PAL_I;
266                         break;
267                 case 'd':
268                 case 'D':
269                 case 'k':
270                 case 'K':
271                         tuner_dbg ("insmod fixup: PAL => PAL-DK\n");
272                         t->std = V4L2_STD_PAL_DK;
273                         break;
274                 case 'M':
275                 case 'm':
276                         tuner_dbg ("insmod fixup: PAL => PAL-M\n");
277                         t->std = V4L2_STD_PAL_M;
278                         break;
279                 case 'N':
280                 case 'n':
281                         tuner_dbg ("insmod fixup: PAL => PAL-N\n");
282                         t->std = V4L2_STD_PAL_N;
283                         break;
284                 case '-':
285                         /* default parameter, do nothing */
286                         break;
287                 default:
288                         tuner_warn ("pal= argument not recognised\n");
289                         break;
290                 }
291         }
292         if ((t->std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
293                 switch (secam[0]) {
294                 case 'd':
295                 case 'D':
296                 case 'k':
297                 case 'K':
298                         tuner_dbg ("insmod fixup: SECAM => SECAM-DK\n");
299                         t->std = V4L2_STD_SECAM_DK;
300                         break;
301                 case 'l':
302                 case 'L':
303                         tuner_dbg ("insmod fixup: SECAM => SECAM-L\n");
304                         t->std = V4L2_STD_SECAM_L;
305                         break;
306                 case '-':
307                         /* default parameter, do nothing */
308                         break;
309                 default:
310                         tuner_warn ("secam= argument not recognised\n");
311                         break;
312                 }
313         }
314
315         return 0;
316 }
317
318 /* ---------------------------------------------------------------------- */
319
320 /* static var Used only in tuner_attach and tuner_probe */
321 static unsigned default_mode_mask;
322
323 /* During client attach, set_type is called by adapter's attach_inform callback.
324    set_type must then be completed by tuner_attach.
325  */
326 static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
327 {
328         struct tuner *t;
329
330         client_template.adapter = adap;
331         client_template.addr = addr;
332
333         t = kmalloc(sizeof(struct tuner), GFP_KERNEL);
334         if (NULL == t)
335                 return -ENOMEM;
336         memset(t, 0, sizeof(struct tuner));
337         memcpy(&t->i2c, &client_template, sizeof(struct i2c_client));
338         i2c_set_clientdata(&t->i2c, t);
339         t->type = UNSET;
340         t->radio_if2 = 10700 * 1000;    /* 10.7MHz - FM radio */
341         t->audmode = V4L2_TUNER_MODE_STEREO;
342         t->mode_mask = T_UNINITIALIZED;
343
344
345         tuner_info("chip found @ 0x%x (%s)\n", addr << 1, adap->name);
346
347         if (show_i2c) {
348                 unsigned char buffer[16];
349                 int i,rc;
350
351                 memset(buffer, 0, sizeof(buffer));
352                 rc = i2c_master_recv(&t->i2c, buffer, sizeof(buffer));
353                 printk("tuner-%04x I2C RECV = ",addr);
354                 for (i=0;i<rc;i++)
355                         printk("%02x ",buffer[i]);
356                 printk("\n");
357         }
358         /* TEA5767 autodetection code - only for addr = 0xc0 */
359         if (!no_autodetect) {
360                 if (addr == 0x60) {
361                         if (tea5767_autodetection(&t->i2c) != EINVAL) {
362                                 t->type = TUNER_TEA5767;
363                                 t->mode_mask = T_RADIO;
364                                 t->mode = T_STANDBY;
365                                 t->freq = 87.5 * 16; /* Sets freq to FM range */
366                                 default_mode_mask &= ~T_RADIO;
367
368                                 i2c_attach_client (&t->i2c);
369                                 set_type(&t->i2c,t->type, t->mode_mask);
370                                 return 0;
371                         }
372                 }
373         }
374
375         /* Initializes only the first adapter found */
376         if (default_mode_mask != T_UNINITIALIZED) {
377                 tuner_dbg ("Setting mode_mask to 0x%02x\n", default_mode_mask);
378                 t->mode_mask = default_mode_mask;
379                 t->freq = 400 * 16; /* Sets freq to VHF High */
380                 default_mode_mask = T_UNINITIALIZED;
381         }
382
383         /* Should be just before return */
384         i2c_attach_client (&t->i2c);
385         set_type (&t->i2c,t->type, t->mode_mask);
386         return 0;
387 }
388
389 static int tuner_probe(struct i2c_adapter *adap)
390 {
391         if (0 != addr) {
392                 normal_i2c[0] = addr;
393                 normal_i2c[1] = I2C_CLIENT_END;
394         }
395
396         default_mode_mask = T_RADIO | T_ANALOG_TV | T_DIGITAL_TV;
397
398         if (adap->class & I2C_CLASS_TV_ANALOG)
399                 return i2c_probe(adap, &addr_data, tuner_attach);
400         return 0;
401 }
402
403 static int tuner_detach(struct i2c_client *client)
404 {
405         struct tuner *t = i2c_get_clientdata(client);
406         int err;
407
408         err = i2c_detach_client(&t->i2c);
409         if (err) {
410                 tuner_warn
411                     ("Client deregistration failed, client not detached.\n");
412                 return err;
413         }
414
415         kfree(t);
416         return 0;
417 }
418
419 /*
420  * Switch tuner to other mode. If tuner support both tv and radio,
421  * set another frequency to some value (This is needed for some pal
422  * tuners to avoid locking). Otherwise, just put second tuner in
423  * standby mode.
424  */
425
426 static inline int set_mode(struct i2c_client *client, struct tuner *t, int mode, char *cmd)
427 {
428         if (mode == t->mode)
429                 return 0;
430
431         t->mode = mode;
432
433         if (check_mode(t, cmd) == EINVAL) {
434                 t->mode = T_STANDBY;
435                 if (t->standby)
436                         t->standby (client);
437                 return EINVAL;
438         }
439         return 0;
440 }
441
442 #define switch_v4l2()   if (!t->using_v4l2) \
443                             tuner_dbg("switching to v4l2\n"); \
444                         t->using_v4l2 = 1;
445
446 static inline int check_v4l2(struct tuner *t)
447 {
448         if (t->using_v4l2) {
449                 tuner_dbg ("ignore v4l1 call\n");
450                 return EINVAL;
451         }
452         return 0;
453 }
454
455 static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
456 {
457         struct tuner *t = i2c_get_clientdata(client);
458         unsigned int *iarg = (int *)arg;
459
460         switch (cmd) {
461         /* --- configuration --- */
462         case TUNER_SET_TYPE_ADDR:
463                 tuner_dbg ("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x\n",
464                                 ((struct tuner_setup *)arg)->type,
465                                 ((struct tuner_setup *)arg)->addr,
466                                 ((struct tuner_setup *)arg)->mode_mask);
467
468                 set_addr(client, (struct tuner_setup *)arg);
469                 break;
470         case AUDC_SET_RADIO:
471                 set_mode(client,t,V4L2_TUNER_RADIO, "AUDC_SET_RADIO");
472                 break;
473         case TUNER_SET_STANDBY:
474                 {
475                         if (check_mode(t, "TUNER_SET_STANDBY") == EINVAL)
476                                 return 0;
477                         if (t->standby)
478                                 t->standby (client);
479                         break;
480                 }
481         case AUDC_CONFIG_PINNACLE:
482                 if (check_mode(t, "AUDC_CONFIG_PINNACLE") == EINVAL)
483                         return 0;
484                 switch (*iarg) {
485                 case 2:
486                         tuner_dbg("pinnacle pal\n");
487                         t->radio_if2 = 33300 * 1000;
488                         break;
489                 case 3:
490                         tuner_dbg("pinnacle ntsc\n");
491                         t->radio_if2 = 41300 * 1000;
492                         break;
493                 }
494                 break;
495         case VIDIOCSAUDIO:
496                 if (check_mode(t, "VIDIOCSAUDIO") == EINVAL)
497                         return 0;
498                 if (check_v4l2(t) == EINVAL)
499                         return 0;
500
501                 /* Should be implemented, since bttv calls it */
502                 tuner_dbg("VIDIOCSAUDIO not implemented.\n");
503
504                 break;
505         case MSP_SET_MATRIX:
506         case TDA9887_SET_CONFIG:
507                 break;
508         /* --- v4l ioctls --- */
509         /* take care: bttv does userspace copying, we'll get a
510            kernel pointer here... */
511         case VIDIOCSCHAN:
512                 {
513                         static const v4l2_std_id map[] = {
514                                 [VIDEO_MODE_PAL] = V4L2_STD_PAL,
515                                 [VIDEO_MODE_NTSC] = V4L2_STD_NTSC_M,
516                                 [VIDEO_MODE_SECAM] = V4L2_STD_SECAM,
517                                 [4 /* bttv */ ] = V4L2_STD_PAL_M,
518                                 [5 /* bttv */ ] = V4L2_STD_PAL_N,
519                                 [6 /* bttv */ ] = V4L2_STD_NTSC_M_JP,
520                         };
521                         struct video_channel *vc = arg;
522
523                         if (check_v4l2(t) == EINVAL)
524                                 return 0;
525
526                         if (set_mode(client,t,V4L2_TUNER_ANALOG_TV, "VIDIOCSCHAN")==EINVAL)
527                                 return 0;
528
529                         if (vc->norm < ARRAY_SIZE(map))
530                                 t->std = map[vc->norm];
531                         tuner_fixup_std(t);
532                         if (t->freq)
533                                 set_tv_freq(client, t->freq);
534                         return 0;
535                 }
536         case VIDIOCSFREQ:
537                 {
538                         unsigned long *v = arg;
539
540                         if (check_mode(t, "VIDIOCSFREQ") == EINVAL)
541                                 return 0;
542                         if (check_v4l2(t) == EINVAL)
543                                 return 0;
544
545                         set_freq(client, *v);
546                         return 0;
547                 }
548         case VIDIOCGTUNER:
549                 {
550                         struct video_tuner *vt = arg;
551
552                         if (check_mode(t, "VIDIOCGTUNER") == EINVAL)
553                                 return 0;
554                         if (check_v4l2(t) == EINVAL)
555                                 return 0;
556
557                         if (V4L2_TUNER_RADIO == t->mode) {
558                                 if (t->has_signal)
559                                         vt->signal = t->has_signal(client);
560                                 if (t->is_stereo) {
561                                         if (t->is_stereo(client))
562                                                 vt->flags |=
563                                                     VIDEO_TUNER_STEREO_ON;
564                                         else
565                                                 vt->flags &=
566                                                     ~VIDEO_TUNER_STEREO_ON;
567                                 }
568                                 vt->flags |= VIDEO_TUNER_LOW;   /* Allow freqs at 62.5 Hz */
569
570                                 vt->rangelow = radio_range[0] * 16000;
571                                 vt->rangehigh = radio_range[1] * 16000;
572
573                         } else {
574                                 vt->rangelow = tv_range[0] * 16;
575                                 vt->rangehigh = tv_range[1] * 16;
576                         }
577
578                         return 0;
579                 }
580         case VIDIOCGAUDIO:
581                 {
582                         struct video_audio *va = arg;
583
584                         if (check_mode(t, "VIDIOCGAUDIO") == EINVAL)
585                                 return 0;
586                         if (check_v4l2(t) == EINVAL)
587                                 return 0;
588
589                         if (V4L2_TUNER_RADIO == t->mode && t->is_stereo)
590                                 va->mode = t->is_stereo(client)
591                                     ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
592                         return 0;
593                 }
594
595         case VIDIOC_S_STD:
596                 {
597                         v4l2_std_id *id = arg;
598
599                         if (set_mode (client, t, V4L2_TUNER_ANALOG_TV, "VIDIOC_S_STD")
600                                         == EINVAL)
601                                 return 0;
602
603                         switch_v4l2();
604
605                         t->std = *id;
606                         tuner_fixup_std(t);
607                         if (t->freq)
608                                 set_freq(client, t->freq);
609                         break;
610                 }
611         case VIDIOC_S_FREQUENCY:
612                 {
613                         struct v4l2_frequency *f = arg;
614
615                         t->freq = f->frequency;
616                         switch_v4l2();
617                         if (V4L2_TUNER_RADIO == f->type &&
618                             V4L2_TUNER_RADIO != t->mode) {
619                                 if (set_mode (client, t, f->type, "VIDIOC_S_FREQUENCY")
620                                             == EINVAL)
621                                         return 0;
622                         }
623                         set_freq(client,t->freq);
624
625                         break;
626                 }
627         case VIDIOC_G_FREQUENCY:
628                 {
629                         struct v4l2_frequency *f = arg;
630
631                         if (check_mode(t, "VIDIOC_G_FREQUENCY") == EINVAL)
632                                 return 0;
633                         switch_v4l2();
634                         f->type = t->mode;
635                         f->frequency = t->freq;
636                         break;
637                 }
638         case VIDIOC_G_TUNER:
639                 {
640                         struct v4l2_tuner *tuner = arg;
641
642                         if (check_mode(t, "VIDIOC_G_TUNER") == EINVAL)
643                                 return 0;
644                         switch_v4l2();
645
646                         if (V4L2_TUNER_RADIO == t->mode) {
647
648                                 if (t->has_signal)
649                                         tuner->signal = t->has_signal(client);
650
651                                 if (t->is_stereo) {
652                                         if (t->is_stereo(client)) {
653                                                 tuner->rxsubchans =
654                                                     V4L2_TUNER_SUB_STEREO |
655                                                     V4L2_TUNER_SUB_MONO;
656                                         } else {
657                                                 tuner->rxsubchans =
658                                                     V4L2_TUNER_SUB_MONO;
659                                         }
660                                 }
661
662                                 tuner->capability |=
663                                     V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
664
665                                 tuner->audmode = t->audmode;
666
667                                 tuner->rangelow = radio_range[0] * 16000;
668                                 tuner->rangehigh = radio_range[1] * 16000;
669                         } else {
670                                 tuner->rangelow = tv_range[0] * 16;
671                                 tuner->rangehigh = tv_range[1] * 16;
672                         }
673                         break;
674                 }
675         case VIDIOC_S_TUNER:
676                 {
677                         struct v4l2_tuner *tuner = arg;
678
679                         if (check_mode(t, "VIDIOC_S_TUNER") == EINVAL)
680                                 return 0;
681
682                         switch_v4l2();
683
684                         if (V4L2_TUNER_RADIO == t->mode) {
685                                 t->audmode = tuner->audmode;
686                                 set_radio_freq(client, t->freq);
687                         }
688                         break;
689                 }
690         default:
691                 tuner_dbg("Unimplemented IOCTL 0x%08x(dir=%d,tp=0x%02x,nr=%d,sz=%d)\n",
692                                          cmd, _IOC_DIR(cmd), _IOC_TYPE(cmd),
693                                         _IOC_NR(cmd), _IOC_SIZE(cmd));
694                 break;
695         }
696
697         return 0;
698 }
699
700 static int tuner_suspend(struct device *dev, pm_message_t state)
701 {
702         struct i2c_client *c = container_of (dev, struct i2c_client, dev);
703         struct tuner *t = i2c_get_clientdata (c);
704
705         tuner_dbg ("suspend\n");
706         /* FIXME: power down ??? */
707         return 0;
708 }
709
710 static int tuner_resume(struct device *dev)
711 {
712         struct i2c_client *c = container_of (dev, struct i2c_client, dev);
713         struct tuner *t = i2c_get_clientdata (c);
714
715         tuner_dbg ("resume\n");
716         if (t->freq)
717                 set_freq(c, t->freq);
718         return 0;
719 }
720
721 /* ----------------------------------------------------------------------- */
722
723 static struct i2c_driver driver = {
724         .owner = THIS_MODULE,
725         .name = "tuner",
726         .id = I2C_DRIVERID_TUNER,
727         .flags = I2C_DF_NOTIFY,
728         .attach_adapter = tuner_probe,
729         .detach_client = tuner_detach,
730         .command = tuner_command,
731         .driver = {
732                    .suspend = tuner_suspend,
733                    .resume = tuner_resume,
734                    },
735 };
736 static struct i2c_client client_template = {
737         .name = "(tuner unset)",
738         .flags = I2C_CLIENT_ALLOW_USE,
739         .driver = &driver,
740 };
741
742 static int __init tuner_init_module(void)
743 {
744         return i2c_add_driver(&driver);
745 }
746
747 static void __exit tuner_cleanup_module(void)
748 {
749         i2c_del_driver(&driver);
750 }
751
752 module_init(tuner_init_module);
753 module_exit(tuner_cleanup_module);
754
755 /*
756  * Overrides for Emacs so that we follow Linus's tabbing style.
757  * ---------------------------------------------------------------------------
758  * Local variables:
759  * c-basic-offset: 8
760  * End:
761  */