2 * i2c tv tuner chip device driver
3 * core core, i.e. kernel interfaces, registering and so on
5 * Copyright(c) by Ralph Metzler, Gerd Knorr, Gunther Mayer
7 * Copyright(c) 2005-2011 by Mauro Carvalho Chehab
8 * - Added support for a separate Radio tuner
9 * - Major rework and cleanups at the code
11 * This driver supports many devices and the idea is to let the driver
12 * detect which device is present. So rather than listing all supported
13 * devices here, we pretend to support a single, fake device type that will
14 * handle both radio and analog TV tuning.
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/timer.h>
21 #include <linux/delay.h>
22 #include <linux/errno.h>
23 #include <linux/slab.h>
24 #include <linux/poll.h>
25 #include <linux/i2c.h>
26 #include <linux/types.h>
27 #include <linux/init.h>
28 #include <linux/videodev2.h>
29 #include <media/tuner.h>
30 #include <media/tuner-types.h>
31 #include <media/v4l2-device.h>
32 #include <media/v4l2-ioctl.h>
37 #include "tuner-xc2028.h"
38 #include "tuner-simple.h"
45 #define PREFIX (t->i2c->driver->driver.name)
48 * Driver modprobe parameters
51 /* insmod options used at init time => read/only */
52 static unsigned int addr;
53 static unsigned int no_autodetect;
54 static unsigned int show_i2c;
56 module_param(addr, int, 0444);
57 module_param(no_autodetect, int, 0444);
58 module_param(show_i2c, int, 0444);
60 /* insmod options used at runtime => read/write */
61 static int tuner_debug;
62 static unsigned int tv_range[2] = { 44, 958 };
63 static unsigned int radio_range[2] = { 65, 108 };
64 static char pal[] = "--";
65 static char secam[] = "--";
66 static char ntsc[] = "-";
68 module_param_named(debug, tuner_debug, int, 0644);
69 module_param_array(tv_range, int, NULL, 0644);
70 module_param_array(radio_range, int, NULL, 0644);
71 module_param_string(pal, pal, sizeof(pal), 0644);
72 module_param_string(secam, secam, sizeof(secam), 0644);
73 module_param_string(ntsc, ntsc, sizeof(ntsc), 0644);
79 static LIST_HEAD(tuner_list);
80 static const struct v4l2_subdev_ops tuner_ops;
86 #define tuner_warn(fmt, arg...) do { \
87 printk(KERN_WARNING "%s %d-%04x: " fmt, PREFIX, \
88 i2c_adapter_id(t->i2c->adapter), \
89 t->i2c->addr, ##arg); \
92 #define tuner_info(fmt, arg...) do { \
93 printk(KERN_INFO "%s %d-%04x: " fmt, PREFIX, \
94 i2c_adapter_id(t->i2c->adapter), \
95 t->i2c->addr, ##arg); \
98 #define tuner_err(fmt, arg...) do { \
99 printk(KERN_ERR "%s %d-%04x: " fmt, PREFIX, \
100 i2c_adapter_id(t->i2c->adapter), \
101 t->i2c->addr, ##arg); \
104 #define tuner_dbg(fmt, arg...) do { \
106 printk(KERN_DEBUG "%s %d-%04x: " fmt, PREFIX, \
107 i2c_adapter_id(t->i2c->adapter), \
108 t->i2c->addr, ##arg); \
112 * Internal struct used inside the driver
117 struct dvb_frontend fe;
118 struct i2c_client *i2c;
119 struct v4l2_subdev sd;
120 struct list_head list;
122 /* keep track of the current settings */
124 unsigned int tv_freq;
125 unsigned int radio_freq;
126 unsigned int audmode;
128 enum v4l2_tuner_type mode;
129 unsigned int mode_mask; /* Combination of allowable modes */
131 bool standby; /* Standby mode */
133 unsigned int type; /* chip type id */
139 * Function prototypes
142 static void set_tv_freq(struct i2c_client *c, unsigned int freq);
143 static void set_radio_freq(struct i2c_client *c, unsigned int freq);
146 * tuner attach/detach logic
149 /* This macro allows us to probe dynamically, avoiding static links */
150 #ifdef CONFIG_MEDIA_ATTACH
151 #define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
153 typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
155 __r = (int) __a(ARGS); \
156 symbol_put(FUNCTION); \
158 printk(KERN_ERR "TUNER: Unable to find " \
159 "symbol "#FUNCTION"()\n"); \
164 static void tuner_detach(struct dvb_frontend *fe)
166 if (fe->ops.tuner_ops.release) {
167 fe->ops.tuner_ops.release(fe);
168 symbol_put_addr(fe->ops.tuner_ops.release);
170 if (fe->ops.analog_ops.release) {
171 fe->ops.analog_ops.release(fe);
172 symbol_put_addr(fe->ops.analog_ops.release);
176 #define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
180 static void tuner_detach(struct dvb_frontend *fe)
182 if (fe->ops.tuner_ops.release)
183 fe->ops.tuner_ops.release(fe);
184 if (fe->ops.analog_ops.release)
185 fe->ops.analog_ops.release(fe);
190 static inline struct tuner *to_tuner(struct v4l2_subdev *sd)
192 return container_of(sd, struct tuner, sd);
196 * struct analog_demod_ops callbacks
199 static void fe_set_params(struct dvb_frontend *fe,
200 struct analog_parameters *params)
202 struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
203 struct tuner *t = fe->analog_demod_priv;
205 if (NULL == fe_tuner_ops->set_analog_params) {
206 tuner_warn("Tuner frontend module has no way to set freq\n");
209 fe_tuner_ops->set_analog_params(fe, params);
212 static void fe_standby(struct dvb_frontend *fe)
214 struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
216 if (fe_tuner_ops->sleep)
217 fe_tuner_ops->sleep(fe);
220 static int fe_has_signal(struct dvb_frontend *fe)
224 if (fe->ops.tuner_ops.get_rf_strength)
225 fe->ops.tuner_ops.get_rf_strength(fe, &strength);
230 static int fe_set_config(struct dvb_frontend *fe, void *priv_cfg)
232 struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
233 struct tuner *t = fe->analog_demod_priv;
235 if (fe_tuner_ops->set_config)
236 return fe_tuner_ops->set_config(fe, priv_cfg);
238 tuner_warn("Tuner frontend module has no way to set config\n");
243 static void tuner_status(struct dvb_frontend *fe);
245 static struct analog_demod_ops tuner_analog_ops = {
246 .set_params = fe_set_params,
247 .standby = fe_standby,
248 .has_signal = fe_has_signal,
249 .set_config = fe_set_config,
250 .tuner_status = tuner_status
254 * Functions to select between radio and TV and tuner probe/remove functions
258 * set_type - Sets the tuner type for a given device
260 * @c: i2c_client descriptoy
261 * @type: type of the tuner (e. g. tuner number)
262 * @new_mode_mask: Indicates if tuner supports TV and/or Radio
263 * @new_config: an optional parameter ranging from 0-255 used by
264 a few tuners to adjust an internal parameter,
266 * @tuner_callback: an optional function to be called when switching
269 * This function applys the tuner config to tuner specified
270 * by tun_setup structure. It contains several per-tuner initialization "magic"
272 static void set_type(struct i2c_client *c, unsigned int type,
273 unsigned int new_mode_mask, unsigned int new_config,
274 int (*tuner_callback) (void *dev, int component, int cmd, int arg))
276 struct tuner *t = to_tuner(i2c_get_clientdata(c));
277 struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
278 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
279 unsigned char buffer[4];
282 if (type == UNSET || type == TUNER_ABSENT) {
283 tuner_dbg("tuner 0x%02x: Tuner type absent\n", c->addr);
288 /* prevent invalid config values */
289 t->config = new_config < 256 ? new_config : 0;
290 if (tuner_callback != NULL) {
291 tuner_dbg("defining GPIO callback\n");
292 t->fe.callback = tuner_callback;
295 /* discard private data, in case set_type() was previously called */
296 tuner_detach(&t->fe);
297 t->fe.analog_demod_priv = NULL;
301 if (!dvb_attach(microtune_attach,
302 &t->fe, t->i2c->adapter, t->i2c->addr))
305 case TUNER_PHILIPS_TDA8290:
307 struct tda829x_config cfg = {
308 .lna_cfg = t->config,
310 if (!dvb_attach(tda829x_attach, &t->fe, t->i2c->adapter,
316 if (!dvb_attach(tea5767_attach, &t->fe,
317 t->i2c->adapter, t->i2c->addr))
319 t->mode_mask = T_RADIO;
322 if (!dvb_attach(tea5761_attach, &t->fe,
323 t->i2c->adapter, t->i2c->addr))
325 t->mode_mask = T_RADIO;
327 case TUNER_PHILIPS_FMD1216ME_MK3:
332 i2c_master_send(c, buffer, 4);
336 i2c_master_send(c, buffer, 4);
337 if (!dvb_attach(simple_tuner_attach, &t->fe,
338 t->i2c->adapter, t->i2c->addr, t->type))
341 case TUNER_PHILIPS_TD1316:
346 i2c_master_send(c, buffer, 4);
347 if (!dvb_attach(simple_tuner_attach, &t->fe,
348 t->i2c->adapter, t->i2c->addr, t->type))
353 struct xc2028_config cfg = {
354 .i2c_adap = t->i2c->adapter,
355 .i2c_addr = t->i2c->addr,
357 if (!dvb_attach(xc2028_attach, &t->fe, &cfg))
363 if (!dvb_attach(tda9887_attach,
364 &t->fe, t->i2c->adapter, t->i2c->addr))
369 struct xc5000_config xc5000_cfg = {
370 .i2c_address = t->i2c->addr,
371 /* if_khz will be set at dvb_attach() */
375 if (!dvb_attach(xc5000_attach,
376 &t->fe, t->i2c->adapter, &xc5000_cfg))
381 case TUNER_NXP_TDA18271:
383 struct tda18271_config cfg = {
385 .small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
388 if (!dvb_attach(tda18271_attach, &t->fe, t->i2c->addr,
389 t->i2c->adapter, &cfg))
395 if (!dvb_attach(simple_tuner_attach, &t->fe,
396 t->i2c->adapter, t->i2c->addr, t->type))
402 if ((NULL == analog_ops->set_params) &&
403 (fe_tuner_ops->set_analog_params)) {
405 t->name = fe_tuner_ops->info.name;
407 t->fe.analog_demod_priv = t;
408 memcpy(analog_ops, &tuner_analog_ops,
409 sizeof(struct analog_demod_ops));
412 t->name = analog_ops->info.name;
415 tuner_dbg("type set to %s\n", t->name);
417 t->mode_mask = new_mode_mask;
419 /* Some tuners require more initialization setup before use,
420 such as firmware download or device calibration.
421 trying to set a frequency here will just fail
422 FIXME: better to move set_freq to the tuner code. This is needed
423 on analog tuners for PLL to properly work
426 if (V4L2_TUNER_RADIO == t->mode)
427 set_radio_freq(c, t->radio_freq);
429 set_tv_freq(c, t->tv_freq);
432 tuner_dbg("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
433 c->adapter->name, c->driver->driver.name, c->addr << 1, type,
438 tuner_dbg("Tuner attach for type = %d failed.\n", t->type);
439 t->type = TUNER_ABSENT;
445 * tuner_s_type_addr - Sets the tuner type for a device
447 * @sd: subdev descriptor
448 * @tun_setup: type to be associated to a given tuner i2c address
450 * This function applys the tuner config to tuner specified
451 * by tun_setup structure.
452 * If tuner I2C address is UNSET, then it will only set the device
453 * if the tuner supports the mode specified in the call.
454 * If the address is specified, the change will be applied only if
455 * tuner I2C address matches.
456 * The call can change the tuner number and the tuner mode.
458 static int tuner_s_type_addr(struct v4l2_subdev *sd,
459 struct tuner_setup *tun_setup)
461 struct tuner *t = to_tuner(sd);
462 struct i2c_client *c = v4l2_get_subdevdata(sd);
464 tuner_dbg("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x, config=0x%02x\n",
467 tun_setup->mode_mask,
470 if ((t->type == UNSET && ((tun_setup->addr == ADDR_UNSET) &&
471 (t->mode_mask & tun_setup->mode_mask))) ||
472 (tun_setup->addr == c->addr)) {
473 set_type(c, tun_setup->type, tun_setup->mode_mask,
474 tun_setup->config, tun_setup->tuner_callback);
476 tuner_dbg("set addr discarded for type %i, mask %x. "
477 "Asked to change tuner at addr 0x%02x, with mask %x\n",
478 t->type, t->mode_mask,
479 tun_setup->addr, tun_setup->mode_mask);
485 * tuner_s_config - Sets tuner configuration
487 * @sd: subdev descriptor
488 * @cfg: tuner configuration
490 * Calls tuner set_config() private function to set some tuner-internal
493 static int tuner_s_config(struct v4l2_subdev *sd,
494 const struct v4l2_priv_tun_config *cfg)
496 struct tuner *t = to_tuner(sd);
497 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
499 if (t->type != cfg->tuner)
502 if (analog_ops->set_config) {
503 analog_ops->set_config(&t->fe, cfg->priv);
507 tuner_dbg("Tuner frontend module has no way to set config\n");
512 * tuner_lookup - Seek for tuner adapters
514 * @adap: i2c_adapter struct
515 * @radio: pointer to be filled if the adapter is radio
516 * @tv: pointer to be filled if the adapter is TV
518 * Search for existing radio and/or TV tuners on the given I2C adapter,
519 * discarding demod-only adapters (tda9887).
521 * Note that when this function is called from tuner_probe you can be
522 * certain no other devices will be added/deleted at the same time, I2C
523 * core protects against that.
525 static void tuner_lookup(struct i2c_adapter *adap,
526 struct tuner **radio, struct tuner **tv)
533 list_for_each_entry(pos, &tuner_list, list) {
536 if (pos->i2c->adapter != adap ||
537 strcmp(pos->i2c->driver->driver.name, "tuner"))
540 mode_mask = pos->mode_mask;
541 if (*radio == NULL && mode_mask == T_RADIO)
543 /* Note: currently TDA9887 is the only demod-only
544 device. If other devices appear then we need to
545 make this test more general. */
546 else if (*tv == NULL && pos->type != TUNER_TDA9887 &&
547 (pos->mode_mask & T_ANALOG_TV))
553 *tuner_probe - Probes the existing tuners on an I2C bus
555 * @client: i2c_client descriptor
558 * This routine probes for tuners at the expected I2C addresses. On most
559 * cases, if a device answers to a given I2C address, it assumes that the
560 * device is a tuner. On a few cases, however, an additional logic is needed
561 * to double check if the device is really a tuner, or to identify the tuner
562 * type, like on tea5767/5761 devices.
564 * During client attach, set_type is called by adapter's attach_inform callback.
565 * set_type must then be completed by tuner_probe.
567 static int tuner_probe(struct i2c_client *client,
568 const struct i2c_device_id *id)
574 t = kzalloc(sizeof(struct tuner), GFP_KERNEL);
577 v4l2_i2c_subdev_init(&t->sd, client, &tuner_ops);
579 t->name = "(tuner unset)";
581 t->audmode = V4L2_TUNER_MODE_STEREO;
583 t->radio_freq = 87.5 * 16000; /* Initial freq range */
584 t->tv_freq = 400 * 16; /* Sets freq to VHF High - needed for some PLL's to properly start */
587 unsigned char buffer[16];
590 memset(buffer, 0, sizeof(buffer));
591 rc = i2c_master_recv(client, buffer, sizeof(buffer));
592 tuner_info("I2C RECV = ");
593 for (i = 0; i < rc; i++)
594 printk(KERN_CONT "%02x ", buffer[i]);
598 /* autodetection code based on the i2c addr */
599 if (!no_autodetect) {
600 switch (client->addr) {
602 if (tuner_symbol_probe(tea5761_autodetection,
604 t->i2c->addr) >= 0) {
605 t->type = TUNER_TEA5761;
606 t->mode_mask = T_RADIO;
607 tuner_lookup(t->i2c->adapter, &radio, &tv);
609 tv->mode_mask &= ~T_RADIO;
611 goto register_client;
619 /* If chip is not tda8290, don't register.
620 since it can be tda9887*/
621 if (tuner_symbol_probe(tda829x_probe, t->i2c->adapter,
622 t->i2c->addr) >= 0) {
623 tuner_dbg("tda829x detected\n");
625 /* Default is being tda9887 */
626 t->type = TUNER_TDA9887;
627 t->mode_mask = T_RADIO | T_ANALOG_TV;
628 goto register_client;
632 if (tuner_symbol_probe(tea5767_autodetection,
633 t->i2c->adapter, t->i2c->addr)
635 t->type = TUNER_TEA5767;
636 t->mode_mask = T_RADIO;
637 /* Sets freq to FM range */
638 tuner_lookup(t->i2c->adapter, &radio, &tv);
640 tv->mode_mask &= ~T_RADIO;
642 goto register_client;
648 /* Initializes only the first TV tuner on this adapter. Why only the
649 first? Because there are some devices (notably the ones with TI
650 tuners) that have more than one i2c address for the *same* device.
651 Experience shows that, except for just one case, the first
652 address is the right one. The exception is a Russian tuner
653 (ACORP_Y878F). So, the desired behavior is just to enable the
654 first found TV tuner. */
655 tuner_lookup(t->i2c->adapter, &radio, &tv);
657 t->mode_mask = T_ANALOG_TV;
659 t->mode_mask |= T_RADIO;
660 tuner_dbg("Setting mode_mask to 0x%02x\n", t->mode_mask);
663 /* Should be just before return */
665 /* Sets a default mode */
666 if (t->mode_mask & T_ANALOG_TV)
667 t->mode = V4L2_TUNER_ANALOG_TV;
669 t->mode = V4L2_TUNER_RADIO;
670 set_type(client, t->type, t->mode_mask, t->config, t->fe.callback);
671 list_add_tail(&t->list, &tuner_list);
673 tuner_info("Tuner %d found with type(s)%s%s.\n",
675 t->mode_mask & T_RADIO ? " Radio" : "",
676 t->mode_mask & T_ANALOG_TV ? " TV" : "");
681 * tuner_remove - detaches a tuner
683 * @client: i2c_client descriptor
686 static int tuner_remove(struct i2c_client *client)
688 struct tuner *t = to_tuner(i2c_get_clientdata(client));
690 v4l2_device_unregister_subdev(&t->sd);
691 tuner_detach(&t->fe);
692 t->fe.analog_demod_priv = NULL;
700 * Functions to switch between Radio and TV
702 * A few cards have a separate I2C tuner for radio. Those routines
703 * take care of switching between TV/Radio mode, filtering only the
704 * commands that apply to the Radio or TV tuner.
708 * check_mode - Verify if tuner supports the requested mode
709 * @t: a pointer to the module's internal struct_tuner
711 * This function checks if the tuner is capable of tuning analog TV,
712 * digital TV or radio, depending on what the caller wants. If the
713 * tuner can't support that mode, it returns -EINVAL. Otherwise, it
715 * This function is needed for boards that have a separate tuner for
716 * radio (like devices with tea5767).
718 static inline int check_mode(struct tuner *t, enum v4l2_tuner_type mode)
720 if ((1 << mode & t->mode_mask) == 0)
727 * set_mode - Switch tuner to other mode.
728 * @t: a pointer to the module's internal struct_tuner
729 * @mode: enum v4l2_type (radio or TV)
731 * If tuner doesn't support the needed mode (radio or TV), prints a
732 * debug message and returns -EINVAL, changing its state to standby.
733 * Otherwise, changes the mode and returns 0.
735 static int set_mode(struct tuner *t, enum v4l2_tuner_type mode)
737 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
739 if (mode != t->mode) {
740 if (check_mode(t, mode) == -EINVAL) {
741 tuner_dbg("Tuner doesn't support mode %d. "
742 "Putting tuner to sleep\n", mode);
744 if (analog_ops->standby)
745 analog_ops->standby(&t->fe);
749 tuner_dbg("Changing to mode %d\n", mode);
755 * set_freq - Set the tuner to the desired frequency.
756 * @t: a pointer to the module's internal struct_tuner
757 * @freq: frequency to set (0 means to use the current frequency)
759 static void set_freq(struct tuner *t, unsigned int freq)
761 struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
763 if (t->mode == V4L2_TUNER_RADIO) {
765 freq = t->radio_freq;
766 set_radio_freq(client, freq);
770 set_tv_freq(client, freq);
775 * Functions that are specific for TV mode
779 * set_tv_freq - Set tuner frequency, freq in Units of 62.5 kHz = 1/16MHz
781 * @c: i2c_client descriptor
784 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
786 struct tuner *t = to_tuner(i2c_get_clientdata(c));
787 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
789 struct analog_parameters params = {
791 .audmode = t->audmode,
795 if (t->type == UNSET) {
796 tuner_warn("tuner type not set\n");
799 if (NULL == analog_ops->set_params) {
800 tuner_warn("Tuner has no way to set tv freq\n");
803 if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
804 tuner_dbg("TV freq (%d.%02d) out of range (%d-%d)\n",
805 freq / 16, freq % 16 * 100 / 16, tv_range[0],
807 /* V4L2 spec: if the freq is not possible then the closest
808 possible value should be selected */
809 if (freq < tv_range[0] * 16)
810 freq = tv_range[0] * 16;
812 freq = tv_range[1] * 16;
814 params.frequency = freq;
815 tuner_dbg("tv freq set to %d.%02d\n",
816 freq / 16, freq % 16 * 100 / 16);
820 analog_ops->set_params(&t->fe, ¶ms);
824 * tuner_fixup_std - force a given video standard variant
826 * @t: tuner internal struct
829 * A few devices or drivers have problem to detect some standard variations.
830 * On other operational systems, the drivers generally have a per-country
831 * code, and some logic to apply per-country hacks. V4L2 API doesn't provide
832 * such hacks. Instead, it relies on a proper video standard selection from
833 * the userspace application. However, as some apps are buggy, not allowing
834 * to distinguish all video standard variations, a modprobe parameter can
835 * be used to force a video standard match.
837 static v4l2_std_id tuner_fixup_std(struct tuner *t, v4l2_std_id std)
839 if (pal[0] != '-' && (std & V4L2_STD_PAL) == V4L2_STD_PAL) {
842 return V4L2_STD_PAL_60;
847 return V4L2_STD_PAL_BG;
850 return V4L2_STD_PAL_I;
855 return V4L2_STD_PAL_DK;
858 return V4L2_STD_PAL_M;
861 if (pal[1] == 'c' || pal[1] == 'C')
862 return V4L2_STD_PAL_Nc;
863 return V4L2_STD_PAL_N;
865 tuner_warn("pal= argument not recognised\n");
869 if (secam[0] != '-' && (std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
877 return V4L2_STD_SECAM_B |
884 return V4L2_STD_SECAM_DK;
887 if ((secam[1] == 'C') || (secam[1] == 'c'))
888 return V4L2_STD_SECAM_LC;
889 return V4L2_STD_SECAM_L;
891 tuner_warn("secam= argument not recognised\n");
896 if (ntsc[0] != '-' && (std & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
900 return V4L2_STD_NTSC_M;
903 return V4L2_STD_NTSC_M_JP;
906 return V4L2_STD_NTSC_M_KR;
908 tuner_info("ntsc= argument not recognised\n");
916 * Functions that are specific for Radio mode
920 * set_radio_freq - Set tuner frequency, freq in Units of 62.5 Hz = 1/16kHz
922 * @c: i2c_client descriptor
925 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
927 struct tuner *t = to_tuner(i2c_get_clientdata(c));
928 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
930 struct analog_parameters params = {
932 .audmode = t->audmode,
936 if (t->type == UNSET) {
937 tuner_warn("tuner type not set\n");
940 if (NULL == analog_ops->set_params) {
941 tuner_warn("tuner has no way to set radio frequency\n");
944 if (freq < radio_range[0] * 16000 || freq > radio_range[1] * 16000) {
945 tuner_dbg("radio freq (%d.%02d) out of range (%d-%d)\n",
946 freq / 16000, freq % 16000 * 100 / 16000,
947 radio_range[0], radio_range[1]);
948 /* V4L2 spec: if the freq is not possible then the closest
949 possible value should be selected */
950 if (freq < radio_range[0] * 16000)
951 freq = radio_range[0] * 16000;
953 freq = radio_range[1] * 16000;
955 params.frequency = freq;
956 tuner_dbg("radio freq set to %d.%02d\n",
957 freq / 16000, freq % 16000 * 100 / 16000);
958 t->radio_freq = freq;
961 analog_ops->set_params(&t->fe, ¶ms);
965 * Debug function for reporting tuner status to userspace
969 * tuner_status - Dumps the current tuner status at dmesg
970 * @fe: pointer to struct dvb_frontend
972 * This callback is used only for driver debug purposes, answering to
973 * VIDIOC_LOG_STATUS. No changes should happen on this call.
975 static void tuner_status(struct dvb_frontend *fe)
977 struct tuner *t = fe->analog_demod_priv;
978 unsigned long freq, freq_fraction;
979 struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
980 struct analog_demod_ops *analog_ops = &fe->ops.analog_ops;
984 case V4L2_TUNER_RADIO:
987 case V4L2_TUNER_DIGITAL_TV:
990 case V4L2_TUNER_ANALOG_TV:
995 if (t->mode == V4L2_TUNER_RADIO) {
996 freq = t->radio_freq / 16000;
997 freq_fraction = (t->radio_freq % 16000) * 100 / 16000;
999 freq = t->tv_freq / 16;
1000 freq_fraction = (t->tv_freq % 16) * 100 / 16;
1002 tuner_info("Tuner mode: %s%s\n", p,
1003 t->standby ? " on standby mode" : "");
1004 tuner_info("Frequency: %lu.%02lu MHz\n", freq, freq_fraction);
1005 tuner_info("Standard: 0x%08lx\n", (unsigned long)t->std);
1006 if (t->mode != V4L2_TUNER_RADIO)
1008 if (fe_tuner_ops->get_status) {
1011 fe_tuner_ops->get_status(&t->fe, &tuner_status);
1012 if (tuner_status & TUNER_STATUS_LOCKED)
1013 tuner_info("Tuner is locked.\n");
1014 if (tuner_status & TUNER_STATUS_STEREO)
1015 tuner_info("Stereo: yes\n");
1017 if (analog_ops->has_signal)
1018 tuner_info("Signal strength: %d\n",
1019 analog_ops->has_signal(fe));
1023 * Function to splicitly change mode to radio. Probably not needed anymore
1026 static int tuner_s_radio(struct v4l2_subdev *sd)
1028 struct tuner *t = to_tuner(sd);
1030 if (set_mode(t, V4L2_TUNER_RADIO) == 0)
1036 * Tuner callbacks to handle userspace ioctl's
1040 * tuner_s_power - controls the power state of the tuner
1041 * @sd: pointer to struct v4l2_subdev
1042 * @on: a zero value puts the tuner to sleep, non-zero wakes it up
1044 static int tuner_s_power(struct v4l2_subdev *sd, int on)
1046 struct tuner *t = to_tuner(sd);
1047 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
1050 if (t->standby && set_mode(t, t->mode) == 0) {
1051 tuner_dbg("Waking up tuner\n");
1057 tuner_dbg("Putting tuner to sleep\n");
1059 if (analog_ops->standby)
1060 analog_ops->standby(&t->fe);
1064 static int tuner_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
1066 struct tuner *t = to_tuner(sd);
1068 if (set_mode(t, V4L2_TUNER_ANALOG_TV))
1071 t->std = tuner_fixup_std(t, std);
1073 tuner_dbg("Fixup standard %llx to %llx\n", std, t->std);
1078 static int tuner_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
1080 struct tuner *t = to_tuner(sd);
1082 if (set_mode(t, f->type) == 0)
1083 set_freq(t, f->frequency);
1088 * tuner_g_frequency - Get the tuned frequency for the tuner
1089 * @sd: pointer to struct v4l2_subdev
1090 * @f: pointer to struct v4l2_frequency
1092 * At return, the structure f will be filled with tuner frequency
1093 * if the tuner matches the f->type.
1094 * Note: f->type should be initialized before calling it.
1095 * This is done by either video_ioctl2 or by the bridge driver.
1097 static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
1099 struct tuner *t = to_tuner(sd);
1100 struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
1102 if (check_mode(t, f->type) == -EINVAL)
1104 if (f->type == t->mode && fe_tuner_ops->get_frequency && !t->standby) {
1107 fe_tuner_ops->get_frequency(&t->fe, &abs_freq);
1108 f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
1109 DIV_ROUND_CLOSEST(abs_freq * 2, 125) :
1110 DIV_ROUND_CLOSEST(abs_freq, 62500);
1112 f->frequency = (V4L2_TUNER_RADIO == f->type) ?
1113 t->radio_freq : t->tv_freq;
1119 * tuner_g_tuner - Fill in tuner information
1120 * @sd: pointer to struct v4l2_subdev
1121 * @vt: pointer to struct v4l2_tuner
1123 * At return, the structure vt will be filled with tuner information
1124 * if the tuner matches vt->type.
1125 * Note: vt->type should be initialized before calling it.
1126 * This is done by either video_ioctl2 or by the bridge driver.
1128 static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
1130 struct tuner *t = to_tuner(sd);
1131 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
1132 struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
1134 if (check_mode(t, vt->type) == -EINVAL)
1136 if (vt->type == t->mode && analog_ops->get_afc)
1137 vt->afc = analog_ops->get_afc(&t->fe);
1138 if (vt->type == V4L2_TUNER_ANALOG_TV)
1139 vt->capability |= V4L2_TUNER_CAP_NORM;
1140 if (vt->type != V4L2_TUNER_RADIO) {
1141 vt->rangelow = tv_range[0] * 16;
1142 vt->rangehigh = tv_range[1] * 16;
1147 if (vt->type == t->mode) {
1148 vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
1149 if (fe_tuner_ops->get_status) {
1152 fe_tuner_ops->get_status(&t->fe, &tuner_status);
1154 (tuner_status & TUNER_STATUS_STEREO) ?
1155 V4L2_TUNER_SUB_STEREO :
1156 V4L2_TUNER_SUB_MONO;
1158 if (analog_ops->has_signal)
1159 vt->signal = analog_ops->has_signal(&t->fe);
1160 vt->audmode = t->audmode;
1162 vt->capability |= V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
1163 vt->rangelow = radio_range[0] * 16000;
1164 vt->rangehigh = radio_range[1] * 16000;
1170 * tuner_s_tuner - Set the tuner's audio mode
1171 * @sd: pointer to struct v4l2_subdev
1172 * @vt: pointer to struct v4l2_tuner
1174 * Sets the audio mode if the tuner matches vt->type.
1175 * Note: vt->type should be initialized before calling it.
1176 * This is done by either video_ioctl2 or by the bridge driver.
1178 static int tuner_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
1180 struct tuner *t = to_tuner(sd);
1182 if (set_mode(t, vt->type))
1185 if (t->mode == V4L2_TUNER_RADIO)
1186 t->audmode = vt->audmode;
1192 static int tuner_log_status(struct v4l2_subdev *sd)
1194 struct tuner *t = to_tuner(sd);
1195 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
1197 if (analog_ops->tuner_status)
1198 analog_ops->tuner_status(&t->fe);
1202 static int tuner_suspend(struct i2c_client *c, pm_message_t state)
1204 struct tuner *t = to_tuner(i2c_get_clientdata(c));
1205 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
1207 tuner_dbg("suspend\n");
1209 if (!t->standby && analog_ops->standby)
1210 analog_ops->standby(&t->fe);
1215 static int tuner_resume(struct i2c_client *c)
1217 struct tuner *t = to_tuner(i2c_get_clientdata(c));
1219 tuner_dbg("resume\n");
1222 if (set_mode(t, t->mode) == 0)
1228 static int tuner_command(struct i2c_client *client, unsigned cmd, void *arg)
1230 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1232 /* TUNER_SET_CONFIG is still called by tuner-simple.c, so we have
1234 There must be a better way of doing this... */
1236 case TUNER_SET_CONFIG:
1237 return tuner_s_config(sd, arg);
1239 return -ENOIOCTLCMD;
1246 static const struct v4l2_subdev_core_ops tuner_core_ops = {
1247 .log_status = tuner_log_status,
1248 .s_std = tuner_s_std,
1249 .s_power = tuner_s_power,
1252 static const struct v4l2_subdev_tuner_ops tuner_tuner_ops = {
1253 .s_radio = tuner_s_radio,
1254 .g_tuner = tuner_g_tuner,
1255 .s_tuner = tuner_s_tuner,
1256 .s_frequency = tuner_s_frequency,
1257 .g_frequency = tuner_g_frequency,
1258 .s_type_addr = tuner_s_type_addr,
1259 .s_config = tuner_s_config,
1262 static const struct v4l2_subdev_ops tuner_ops = {
1263 .core = &tuner_core_ops,
1264 .tuner = &tuner_tuner_ops,
1268 * I2C structs and module init functions
1271 static const struct i2c_device_id tuner_id[] = {
1272 { "tuner", }, /* autodetect */
1275 MODULE_DEVICE_TABLE(i2c, tuner_id);
1277 static struct i2c_driver tuner_driver = {
1279 .owner = THIS_MODULE,
1282 .probe = tuner_probe,
1283 .remove = tuner_remove,
1284 .command = tuner_command,
1285 .suspend = tuner_suspend,
1286 .resume = tuner_resume,
1287 .id_table = tuner_id,
1290 static __init int init_tuner(void)
1292 return i2c_add_driver(&tuner_driver);
1295 static __exit void exit_tuner(void)
1297 i2c_del_driver(&tuner_driver);
1300 module_init(init_tuner);
1301 module_exit(exit_tuner);
1303 MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
1304 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
1305 MODULE_LICENSE("GPL");