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"
46 #define PREFIX (t->i2c->driver->driver.name)
49 * Driver modprobe parameters
52 /* insmod options used at init time => read/only */
53 static unsigned int addr;
54 static unsigned int no_autodetect;
55 static unsigned int show_i2c;
57 module_param(addr, int, 0444);
58 module_param(no_autodetect, int, 0444);
59 module_param(show_i2c, int, 0444);
61 /* insmod options used at runtime => read/write */
62 static int tuner_debug;
63 static unsigned int tv_range[2] = { 44, 958 };
64 static unsigned int radio_range[2] = { 65, 108 };
65 static char pal[] = "--";
66 static char secam[] = "--";
67 static char ntsc[] = "-";
69 module_param_named(debug, tuner_debug, int, 0644);
70 module_param_array(tv_range, int, NULL, 0644);
71 module_param_array(radio_range, int, NULL, 0644);
72 module_param_string(pal, pal, sizeof(pal), 0644);
73 module_param_string(secam, secam, sizeof(secam), 0644);
74 module_param_string(ntsc, ntsc, sizeof(ntsc), 0644);
80 static LIST_HEAD(tuner_list);
81 static const struct v4l2_subdev_ops tuner_ops;
87 #define tuner_warn(fmt, arg...) do { \
88 printk(KERN_WARNING "%s %d-%04x: " fmt, PREFIX, \
89 i2c_adapter_id(t->i2c->adapter), \
90 t->i2c->addr, ##arg); \
93 #define tuner_info(fmt, arg...) do { \
94 printk(KERN_INFO "%s %d-%04x: " fmt, PREFIX, \
95 i2c_adapter_id(t->i2c->adapter), \
96 t->i2c->addr, ##arg); \
99 #define tuner_err(fmt, arg...) do { \
100 printk(KERN_ERR "%s %d-%04x: " fmt, PREFIX, \
101 i2c_adapter_id(t->i2c->adapter), \
102 t->i2c->addr, ##arg); \
105 #define tuner_dbg(fmt, arg...) do { \
107 printk(KERN_DEBUG "%s %d-%04x: " fmt, PREFIX, \
108 i2c_adapter_id(t->i2c->adapter), \
109 t->i2c->addr, ##arg); \
113 * Internal struct used inside the driver
118 struct dvb_frontend fe;
119 struct i2c_client *i2c;
120 struct v4l2_subdev sd;
121 struct list_head list;
123 /* keep track of the current settings */
125 unsigned int tv_freq;
126 unsigned int radio_freq;
127 unsigned int audmode;
129 enum v4l2_tuner_type mode;
130 unsigned int mode_mask; /* Combination of allowable modes */
132 bool standby; /* Standby mode */
134 unsigned int type; /* chip type id */
140 * Function prototypes
143 static void set_tv_freq(struct i2c_client *c, unsigned int freq);
144 static void set_radio_freq(struct i2c_client *c, unsigned int freq);
147 * tuner attach/detach logic
150 /* This macro allows us to probe dynamically, avoiding static links */
151 #ifdef CONFIG_MEDIA_ATTACH
152 #define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
154 typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
156 __r = (int) __a(ARGS); \
157 symbol_put(FUNCTION); \
159 printk(KERN_ERR "TUNER: Unable to find " \
160 "symbol "#FUNCTION"()\n"); \
165 static void tuner_detach(struct dvb_frontend *fe)
167 if (fe->ops.tuner_ops.release) {
168 fe->ops.tuner_ops.release(fe);
169 symbol_put_addr(fe->ops.tuner_ops.release);
171 if (fe->ops.analog_ops.release) {
172 fe->ops.analog_ops.release(fe);
173 symbol_put_addr(fe->ops.analog_ops.release);
177 #define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
181 static void tuner_detach(struct dvb_frontend *fe)
183 if (fe->ops.tuner_ops.release)
184 fe->ops.tuner_ops.release(fe);
185 if (fe->ops.analog_ops.release)
186 fe->ops.analog_ops.release(fe);
191 static inline struct tuner *to_tuner(struct v4l2_subdev *sd)
193 return container_of(sd, struct tuner, sd);
197 * struct analog_demod_ops callbacks
200 static void fe_set_params(struct dvb_frontend *fe,
201 struct analog_parameters *params)
203 struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
204 struct tuner *t = fe->analog_demod_priv;
206 if (NULL == fe_tuner_ops->set_analog_params) {
207 tuner_warn("Tuner frontend module has no way to set freq\n");
210 fe_tuner_ops->set_analog_params(fe, params);
213 static void fe_standby(struct dvb_frontend *fe)
215 struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
217 if (fe_tuner_ops->sleep)
218 fe_tuner_ops->sleep(fe);
221 static int fe_has_signal(struct dvb_frontend *fe)
225 fe->ops.tuner_ops.get_rf_strength(fe, &strength);
230 static int fe_get_afc(struct dvb_frontend *fe)
234 fe->ops.tuner_ops.get_afc(fe, &afc);
239 static int fe_set_config(struct dvb_frontend *fe, void *priv_cfg)
241 struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
242 struct tuner *t = fe->analog_demod_priv;
244 if (fe_tuner_ops->set_config)
245 return fe_tuner_ops->set_config(fe, priv_cfg);
247 tuner_warn("Tuner frontend module has no way to set config\n");
252 static void tuner_status(struct dvb_frontend *fe);
254 static const struct analog_demod_ops tuner_analog_ops = {
255 .set_params = fe_set_params,
256 .standby = fe_standby,
257 .set_config = fe_set_config,
258 .tuner_status = tuner_status
262 * Functions to select between radio and TV and tuner probe/remove functions
266 * set_type - Sets the tuner type for a given device
268 * @c: i2c_client descriptoy
269 * @type: type of the tuner (e. g. tuner number)
270 * @new_mode_mask: Indicates if tuner supports TV and/or Radio
271 * @new_config: an optional parameter ranging from 0-255 used by
272 a few tuners to adjust an internal parameter,
274 * @tuner_callback: an optional function to be called when switching
277 * This function applys the tuner config to tuner specified
278 * by tun_setup structure. It contains several per-tuner initialization "magic"
280 static void set_type(struct i2c_client *c, unsigned int type,
281 unsigned int new_mode_mask, unsigned int new_config,
282 int (*tuner_callback) (void *dev, int component, int cmd, int arg))
284 struct tuner *t = to_tuner(i2c_get_clientdata(c));
285 struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
286 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
287 unsigned char buffer[4];
290 if (type == UNSET || type == TUNER_ABSENT) {
291 tuner_dbg("tuner 0x%02x: Tuner type absent\n", c->addr);
296 /* prevent invalid config values */
297 t->config = new_config < 256 ? new_config : 0;
298 if (tuner_callback != NULL) {
299 tuner_dbg("defining GPIO callback\n");
300 t->fe.callback = tuner_callback;
303 /* discard private data, in case set_type() was previously called */
304 tuner_detach(&t->fe);
305 t->fe.analog_demod_priv = NULL;
309 if (!dvb_attach(microtune_attach,
310 &t->fe, t->i2c->adapter, t->i2c->addr))
313 case TUNER_PHILIPS_TDA8290:
315 struct tda829x_config cfg = {
316 .lna_cfg = t->config,
318 if (!dvb_attach(tda829x_attach, &t->fe, t->i2c->adapter,
324 if (!dvb_attach(tea5767_attach, &t->fe,
325 t->i2c->adapter, t->i2c->addr))
327 t->mode_mask = T_RADIO;
330 if (!dvb_attach(tea5761_attach, &t->fe,
331 t->i2c->adapter, t->i2c->addr))
333 t->mode_mask = T_RADIO;
335 case TUNER_PHILIPS_FMD1216ME_MK3:
336 case TUNER_PHILIPS_FMD1216MEX_MK3:
341 i2c_master_send(c, buffer, 4);
345 i2c_master_send(c, buffer, 4);
346 if (!dvb_attach(simple_tuner_attach, &t->fe,
347 t->i2c->adapter, t->i2c->addr, t->type))
350 case TUNER_PHILIPS_TD1316:
355 i2c_master_send(c, buffer, 4);
356 if (!dvb_attach(simple_tuner_attach, &t->fe,
357 t->i2c->adapter, t->i2c->addr, t->type))
362 struct xc2028_config cfg = {
363 .i2c_adap = t->i2c->adapter,
364 .i2c_addr = t->i2c->addr,
366 if (!dvb_attach(xc2028_attach, &t->fe, &cfg))
372 if (!dvb_attach(tda9887_attach,
373 &t->fe, t->i2c->adapter, t->i2c->addr))
378 struct xc5000_config xc5000_cfg = {
379 .i2c_address = t->i2c->addr,
380 /* if_khz will be set at dvb_attach() */
384 if (!dvb_attach(xc5000_attach,
385 &t->fe, t->i2c->adapter, &xc5000_cfg))
392 struct xc5000_config xc5000c_cfg = {
393 .i2c_address = t->i2c->addr,
394 /* if_khz will be set at dvb_attach() */
399 if (!dvb_attach(xc5000_attach,
400 &t->fe, t->i2c->adapter, &xc5000c_cfg))
405 case TUNER_NXP_TDA18271:
407 struct tda18271_config cfg = {
409 .small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
412 if (!dvb_attach(tda18271_attach, &t->fe, t->i2c->addr,
413 t->i2c->adapter, &cfg))
420 struct xc4000_config xc4000_cfg = {
421 .i2c_address = t->i2c->addr,
422 /* FIXME: the correct parameters will be set */
423 /* only when the digital dvb_attach() occurs */
426 .set_smoothedcvbs = 0,
429 if (!dvb_attach(xc4000_attach,
430 &t->fe, t->i2c->adapter, &xc4000_cfg))
436 if (!dvb_attach(simple_tuner_attach, &t->fe,
437 t->i2c->adapter, t->i2c->addr, t->type))
443 if ((NULL == analog_ops->set_params) &&
444 (fe_tuner_ops->set_analog_params)) {
446 t->name = fe_tuner_ops->info.name;
448 t->fe.analog_demod_priv = t;
449 memcpy(analog_ops, &tuner_analog_ops,
450 sizeof(struct analog_demod_ops));
452 if (fe_tuner_ops->get_rf_strength)
453 analog_ops->has_signal = fe_has_signal;
454 if (fe_tuner_ops->get_afc)
455 analog_ops->get_afc = fe_get_afc;
458 t->name = analog_ops->info.name;
461 tuner_dbg("type set to %s\n", t->name);
463 t->mode_mask = new_mode_mask;
465 /* Some tuners require more initialization setup before use,
466 such as firmware download or device calibration.
467 trying to set a frequency here will just fail
468 FIXME: better to move set_freq to the tuner code. This is needed
469 on analog tuners for PLL to properly work
472 if (V4L2_TUNER_RADIO == t->mode)
473 set_radio_freq(c, t->radio_freq);
475 set_tv_freq(c, t->tv_freq);
478 tuner_dbg("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
479 c->adapter->name, c->driver->driver.name, c->addr << 1, type,
484 tuner_dbg("Tuner attach for type = %d failed.\n", t->type);
485 t->type = TUNER_ABSENT;
491 * tuner_s_type_addr - Sets the tuner type for a device
493 * @sd: subdev descriptor
494 * @tun_setup: type to be associated to a given tuner i2c address
496 * This function applys the tuner config to tuner specified
497 * by tun_setup structure.
498 * If tuner I2C address is UNSET, then it will only set the device
499 * if the tuner supports the mode specified in the call.
500 * If the address is specified, the change will be applied only if
501 * tuner I2C address matches.
502 * The call can change the tuner number and the tuner mode.
504 static int tuner_s_type_addr(struct v4l2_subdev *sd,
505 struct tuner_setup *tun_setup)
507 struct tuner *t = to_tuner(sd);
508 struct i2c_client *c = v4l2_get_subdevdata(sd);
510 tuner_dbg("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x, config=0x%02x\n",
513 tun_setup->mode_mask,
516 if ((t->type == UNSET && ((tun_setup->addr == ADDR_UNSET) &&
517 (t->mode_mask & tun_setup->mode_mask))) ||
518 (tun_setup->addr == c->addr)) {
519 set_type(c, tun_setup->type, tun_setup->mode_mask,
520 tun_setup->config, tun_setup->tuner_callback);
522 tuner_dbg("set addr discarded for type %i, mask %x. "
523 "Asked to change tuner at addr 0x%02x, with mask %x\n",
524 t->type, t->mode_mask,
525 tun_setup->addr, tun_setup->mode_mask);
531 * tuner_s_config - Sets tuner configuration
533 * @sd: subdev descriptor
534 * @cfg: tuner configuration
536 * Calls tuner set_config() private function to set some tuner-internal
539 static int tuner_s_config(struct v4l2_subdev *sd,
540 const struct v4l2_priv_tun_config *cfg)
542 struct tuner *t = to_tuner(sd);
543 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
545 if (t->type != cfg->tuner)
548 if (analog_ops->set_config) {
549 analog_ops->set_config(&t->fe, cfg->priv);
553 tuner_dbg("Tuner frontend module has no way to set config\n");
558 * tuner_lookup - Seek for tuner adapters
560 * @adap: i2c_adapter struct
561 * @radio: pointer to be filled if the adapter is radio
562 * @tv: pointer to be filled if the adapter is TV
564 * Search for existing radio and/or TV tuners on the given I2C adapter,
565 * discarding demod-only adapters (tda9887).
567 * Note that when this function is called from tuner_probe you can be
568 * certain no other devices will be added/deleted at the same time, I2C
569 * core protects against that.
571 static void tuner_lookup(struct i2c_adapter *adap,
572 struct tuner **radio, struct tuner **tv)
579 list_for_each_entry(pos, &tuner_list, list) {
582 if (pos->i2c->adapter != adap ||
583 strcmp(pos->i2c->driver->driver.name, "tuner"))
586 mode_mask = pos->mode_mask;
587 if (*radio == NULL && mode_mask == T_RADIO)
589 /* Note: currently TDA9887 is the only demod-only
590 device. If other devices appear then we need to
591 make this test more general. */
592 else if (*tv == NULL && pos->type != TUNER_TDA9887 &&
593 (pos->mode_mask & T_ANALOG_TV))
599 *tuner_probe - Probes the existing tuners on an I2C bus
601 * @client: i2c_client descriptor
604 * This routine probes for tuners at the expected I2C addresses. On most
605 * cases, if a device answers to a given I2C address, it assumes that the
606 * device is a tuner. On a few cases, however, an additional logic is needed
607 * to double check if the device is really a tuner, or to identify the tuner
608 * type, like on tea5767/5761 devices.
610 * During client attach, set_type is called by adapter's attach_inform callback.
611 * set_type must then be completed by tuner_probe.
613 static int tuner_probe(struct i2c_client *client,
614 const struct i2c_device_id *id)
620 t = kzalloc(sizeof(struct tuner), GFP_KERNEL);
623 v4l2_i2c_subdev_init(&t->sd, client, &tuner_ops);
625 t->name = "(tuner unset)";
627 t->audmode = V4L2_TUNER_MODE_STEREO;
629 t->radio_freq = 87.5 * 16000; /* Initial freq range */
630 t->tv_freq = 400 * 16; /* Sets freq to VHF High - needed for some PLL's to properly start */
633 unsigned char buffer[16];
636 memset(buffer, 0, sizeof(buffer));
637 rc = i2c_master_recv(client, buffer, sizeof(buffer));
638 tuner_info("I2C RECV = ");
639 for (i = 0; i < rc; i++)
640 printk(KERN_CONT "%02x ", buffer[i]);
644 /* autodetection code based on the i2c addr */
645 if (!no_autodetect) {
646 switch (client->addr) {
648 if (tuner_symbol_probe(tea5761_autodetection,
650 t->i2c->addr) >= 0) {
651 t->type = TUNER_TEA5761;
652 t->mode_mask = T_RADIO;
653 tuner_lookup(t->i2c->adapter, &radio, &tv);
655 tv->mode_mask &= ~T_RADIO;
657 goto register_client;
665 /* If chip is not tda8290, don't register.
666 since it can be tda9887*/
667 if (tuner_symbol_probe(tda829x_probe, t->i2c->adapter,
668 t->i2c->addr) >= 0) {
669 tuner_dbg("tda829x detected\n");
671 /* Default is being tda9887 */
672 t->type = TUNER_TDA9887;
673 t->mode_mask = T_RADIO | T_ANALOG_TV;
674 goto register_client;
678 if (tuner_symbol_probe(tea5767_autodetection,
679 t->i2c->adapter, t->i2c->addr)
681 t->type = TUNER_TEA5767;
682 t->mode_mask = T_RADIO;
683 /* Sets freq to FM range */
684 tuner_lookup(t->i2c->adapter, &radio, &tv);
686 tv->mode_mask &= ~T_RADIO;
688 goto register_client;
694 /* Initializes only the first TV tuner on this adapter. Why only the
695 first? Because there are some devices (notably the ones with TI
696 tuners) that have more than one i2c address for the *same* device.
697 Experience shows that, except for just one case, the first
698 address is the right one. The exception is a Russian tuner
699 (ACORP_Y878F). So, the desired behavior is just to enable the
700 first found TV tuner. */
701 tuner_lookup(t->i2c->adapter, &radio, &tv);
703 t->mode_mask = T_ANALOG_TV;
705 t->mode_mask |= T_RADIO;
706 tuner_dbg("Setting mode_mask to 0x%02x\n", t->mode_mask);
709 /* Should be just before return */
711 /* Sets a default mode */
712 if (t->mode_mask & T_ANALOG_TV)
713 t->mode = V4L2_TUNER_ANALOG_TV;
715 t->mode = V4L2_TUNER_RADIO;
716 set_type(client, t->type, t->mode_mask, t->config, t->fe.callback);
717 list_add_tail(&t->list, &tuner_list);
719 tuner_info("Tuner %d found with type(s)%s%s.\n",
721 t->mode_mask & T_RADIO ? " Radio" : "",
722 t->mode_mask & T_ANALOG_TV ? " TV" : "");
727 * tuner_remove - detaches a tuner
729 * @client: i2c_client descriptor
732 static int tuner_remove(struct i2c_client *client)
734 struct tuner *t = to_tuner(i2c_get_clientdata(client));
736 v4l2_device_unregister_subdev(&t->sd);
737 tuner_detach(&t->fe);
738 t->fe.analog_demod_priv = NULL;
746 * Functions to switch between Radio and TV
748 * A few cards have a separate I2C tuner for radio. Those routines
749 * take care of switching between TV/Radio mode, filtering only the
750 * commands that apply to the Radio or TV tuner.
754 * check_mode - Verify if tuner supports the requested mode
755 * @t: a pointer to the module's internal struct_tuner
757 * This function checks if the tuner is capable of tuning analog TV,
758 * digital TV or radio, depending on what the caller wants. If the
759 * tuner can't support that mode, it returns -EINVAL. Otherwise, it
761 * This function is needed for boards that have a separate tuner for
762 * radio (like devices with tea5767).
763 * NOTE: mt20xx uses V4L2_TUNER_DIGITAL_TV and calls set_tv_freq to
764 * select a TV frequency. So, t_mode = T_ANALOG_TV could actually
765 * be used to represent a Digital TV too.
767 static inline int check_mode(struct tuner *t, enum v4l2_tuner_type mode)
770 if (mode == V4L2_TUNER_RADIO)
773 t_mode = T_ANALOG_TV;
775 if ((t_mode & t->mode_mask) == 0)
782 * set_mode - Switch tuner to other mode.
783 * @t: a pointer to the module's internal struct_tuner
784 * @mode: enum v4l2_type (radio or TV)
786 * If tuner doesn't support the needed mode (radio or TV), prints a
787 * debug message and returns -EINVAL, changing its state to standby.
788 * Otherwise, changes the mode and returns 0.
790 static int set_mode(struct tuner *t, enum v4l2_tuner_type mode)
792 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
794 if (mode != t->mode) {
795 if (check_mode(t, mode) == -EINVAL) {
796 tuner_dbg("Tuner doesn't support mode %d. "
797 "Putting tuner to sleep\n", mode);
799 if (analog_ops->standby)
800 analog_ops->standby(&t->fe);
804 tuner_dbg("Changing to mode %d\n", mode);
810 * set_freq - Set the tuner to the desired frequency.
811 * @t: a pointer to the module's internal struct_tuner
812 * @freq: frequency to set (0 means to use the current frequency)
814 static void set_freq(struct tuner *t, unsigned int freq)
816 struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
818 if (t->mode == V4L2_TUNER_RADIO) {
820 freq = t->radio_freq;
821 set_radio_freq(client, freq);
825 set_tv_freq(client, freq);
830 * Functions that are specific for TV mode
834 * set_tv_freq - Set tuner frequency, freq in Units of 62.5 kHz = 1/16MHz
836 * @c: i2c_client descriptor
839 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
841 struct tuner *t = to_tuner(i2c_get_clientdata(c));
842 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
844 struct analog_parameters params = {
846 .audmode = t->audmode,
850 if (t->type == UNSET) {
851 tuner_warn("tuner type not set\n");
854 if (NULL == analog_ops->set_params) {
855 tuner_warn("Tuner has no way to set tv freq\n");
858 if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
859 tuner_dbg("TV freq (%d.%02d) out of range (%d-%d)\n",
860 freq / 16, freq % 16 * 100 / 16, tv_range[0],
862 /* V4L2 spec: if the freq is not possible then the closest
863 possible value should be selected */
864 if (freq < tv_range[0] * 16)
865 freq = tv_range[0] * 16;
867 freq = tv_range[1] * 16;
869 params.frequency = freq;
870 tuner_dbg("tv freq set to %d.%02d\n",
871 freq / 16, freq % 16 * 100 / 16);
875 analog_ops->set_params(&t->fe, ¶ms);
879 * tuner_fixup_std - force a given video standard variant
881 * @t: tuner internal struct
884 * A few devices or drivers have problem to detect some standard variations.
885 * On other operational systems, the drivers generally have a per-country
886 * code, and some logic to apply per-country hacks. V4L2 API doesn't provide
887 * such hacks. Instead, it relies on a proper video standard selection from
888 * the userspace application. However, as some apps are buggy, not allowing
889 * to distinguish all video standard variations, a modprobe parameter can
890 * be used to force a video standard match.
892 static v4l2_std_id tuner_fixup_std(struct tuner *t, v4l2_std_id std)
894 if (pal[0] != '-' && (std & V4L2_STD_PAL) == V4L2_STD_PAL) {
897 return V4L2_STD_PAL_60;
902 return V4L2_STD_PAL_BG;
905 return V4L2_STD_PAL_I;
910 return V4L2_STD_PAL_DK;
913 return V4L2_STD_PAL_M;
916 if (pal[1] == 'c' || pal[1] == 'C')
917 return V4L2_STD_PAL_Nc;
918 return V4L2_STD_PAL_N;
920 tuner_warn("pal= argument not recognised\n");
924 if (secam[0] != '-' && (std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
932 return V4L2_STD_SECAM_B |
939 return V4L2_STD_SECAM_DK;
942 if ((secam[1] == 'C') || (secam[1] == 'c'))
943 return V4L2_STD_SECAM_LC;
944 return V4L2_STD_SECAM_L;
946 tuner_warn("secam= argument not recognised\n");
951 if (ntsc[0] != '-' && (std & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
955 return V4L2_STD_NTSC_M;
958 return V4L2_STD_NTSC_M_JP;
961 return V4L2_STD_NTSC_M_KR;
963 tuner_info("ntsc= argument not recognised\n");
971 * Functions that are specific for Radio mode
975 * set_radio_freq - Set tuner frequency, freq in Units of 62.5 Hz = 1/16kHz
977 * @c: i2c_client descriptor
980 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
982 struct tuner *t = to_tuner(i2c_get_clientdata(c));
983 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
985 struct analog_parameters params = {
987 .audmode = t->audmode,
991 if (t->type == UNSET) {
992 tuner_warn("tuner type not set\n");
995 if (NULL == analog_ops->set_params) {
996 tuner_warn("tuner has no way to set radio frequency\n");
999 if (freq < radio_range[0] * 16000 || freq > radio_range[1] * 16000) {
1000 tuner_dbg("radio freq (%d.%02d) out of range (%d-%d)\n",
1001 freq / 16000, freq % 16000 * 100 / 16000,
1002 radio_range[0], radio_range[1]);
1003 /* V4L2 spec: if the freq is not possible then the closest
1004 possible value should be selected */
1005 if (freq < radio_range[0] * 16000)
1006 freq = radio_range[0] * 16000;
1008 freq = radio_range[1] * 16000;
1010 params.frequency = freq;
1011 tuner_dbg("radio freq set to %d.%02d\n",
1012 freq / 16000, freq % 16000 * 100 / 16000);
1013 t->radio_freq = freq;
1016 analog_ops->set_params(&t->fe, ¶ms);
1018 * The tuner driver might decide to change the audmode if it only
1019 * supports stereo, so update t->audmode.
1021 t->audmode = params.audmode;
1025 * Debug function for reporting tuner status to userspace
1029 * tuner_status - Dumps the current tuner status at dmesg
1030 * @fe: pointer to struct dvb_frontend
1032 * This callback is used only for driver debug purposes, answering to
1033 * VIDIOC_LOG_STATUS. No changes should happen on this call.
1035 static void tuner_status(struct dvb_frontend *fe)
1037 struct tuner *t = fe->analog_demod_priv;
1038 unsigned long freq, freq_fraction;
1039 struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
1040 struct analog_demod_ops *analog_ops = &fe->ops.analog_ops;
1044 case V4L2_TUNER_RADIO:
1047 case V4L2_TUNER_DIGITAL_TV: /* Used by mt20xx */
1050 case V4L2_TUNER_ANALOG_TV:
1055 if (t->mode == V4L2_TUNER_RADIO) {
1056 freq = t->radio_freq / 16000;
1057 freq_fraction = (t->radio_freq % 16000) * 100 / 16000;
1059 freq = t->tv_freq / 16;
1060 freq_fraction = (t->tv_freq % 16) * 100 / 16;
1062 tuner_info("Tuner mode: %s%s\n", p,
1063 t->standby ? " on standby mode" : "");
1064 tuner_info("Frequency: %lu.%02lu MHz\n", freq, freq_fraction);
1065 tuner_info("Standard: 0x%08lx\n", (unsigned long)t->std);
1066 if (t->mode != V4L2_TUNER_RADIO)
1068 if (fe_tuner_ops->get_status) {
1071 fe_tuner_ops->get_status(&t->fe, &tuner_status);
1072 if (tuner_status & TUNER_STATUS_LOCKED)
1073 tuner_info("Tuner is locked.\n");
1074 if (tuner_status & TUNER_STATUS_STEREO)
1075 tuner_info("Stereo: yes\n");
1077 if (analog_ops->has_signal)
1078 tuner_info("Signal strength: %d\n",
1079 analog_ops->has_signal(fe));
1083 * Function to splicitly change mode to radio. Probably not needed anymore
1086 static int tuner_s_radio(struct v4l2_subdev *sd)
1088 struct tuner *t = to_tuner(sd);
1090 if (set_mode(t, V4L2_TUNER_RADIO) == 0)
1096 * Tuner callbacks to handle userspace ioctl's
1100 * tuner_s_power - controls the power state of the tuner
1101 * @sd: pointer to struct v4l2_subdev
1102 * @on: a zero value puts the tuner to sleep, non-zero wakes it up
1104 static int tuner_s_power(struct v4l2_subdev *sd, int on)
1106 struct tuner *t = to_tuner(sd);
1107 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
1110 if (t->standby && set_mode(t, t->mode) == 0) {
1111 tuner_dbg("Waking up tuner\n");
1117 tuner_dbg("Putting tuner to sleep\n");
1119 if (analog_ops->standby)
1120 analog_ops->standby(&t->fe);
1124 static int tuner_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
1126 struct tuner *t = to_tuner(sd);
1128 if (set_mode(t, V4L2_TUNER_ANALOG_TV))
1131 t->std = tuner_fixup_std(t, std);
1133 tuner_dbg("Fixup standard %llx to %llx\n", std, t->std);
1138 static int tuner_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f)
1140 struct tuner *t = to_tuner(sd);
1142 if (set_mode(t, f->type) == 0)
1143 set_freq(t, f->frequency);
1148 * tuner_g_frequency - Get the tuned frequency for the tuner
1149 * @sd: pointer to struct v4l2_subdev
1150 * @f: pointer to struct v4l2_frequency
1152 * At return, the structure f will be filled with tuner frequency
1153 * if the tuner matches the f->type.
1154 * Note: f->type should be initialized before calling it.
1155 * This is done by either video_ioctl2 or by the bridge driver.
1157 static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
1159 struct tuner *t = to_tuner(sd);
1160 struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
1162 if (check_mode(t, f->type) == -EINVAL)
1164 if (f->type == t->mode && fe_tuner_ops->get_frequency && !t->standby) {
1167 fe_tuner_ops->get_frequency(&t->fe, &abs_freq);
1168 f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
1169 DIV_ROUND_CLOSEST(abs_freq * 2, 125) :
1170 DIV_ROUND_CLOSEST(abs_freq, 62500);
1172 f->frequency = (V4L2_TUNER_RADIO == f->type) ?
1173 t->radio_freq : t->tv_freq;
1179 * tuner_g_tuner - Fill in tuner information
1180 * @sd: pointer to struct v4l2_subdev
1181 * @vt: pointer to struct v4l2_tuner
1183 * At return, the structure vt will be filled with tuner information
1184 * if the tuner matches vt->type.
1185 * Note: vt->type should be initialized before calling it.
1186 * This is done by either video_ioctl2 or by the bridge driver.
1188 static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
1190 struct tuner *t = to_tuner(sd);
1191 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
1192 struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
1194 if (check_mode(t, vt->type) == -EINVAL)
1196 if (vt->type == t->mode && analog_ops->get_afc)
1197 vt->afc = analog_ops->get_afc(&t->fe);
1198 if (analog_ops->has_signal)
1199 vt->signal = analog_ops->has_signal(&t->fe);
1200 if (vt->type != V4L2_TUNER_RADIO) {
1201 vt->capability |= V4L2_TUNER_CAP_NORM;
1202 vt->rangelow = tv_range[0] * 16;
1203 vt->rangehigh = tv_range[1] * 16;
1208 if (vt->type == t->mode) {
1209 vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
1210 if (fe_tuner_ops->get_status) {
1213 fe_tuner_ops->get_status(&t->fe, &tuner_status);
1215 (tuner_status & TUNER_STATUS_STEREO) ?
1216 V4L2_TUNER_SUB_STEREO :
1217 V4L2_TUNER_SUB_MONO;
1219 vt->audmode = t->audmode;
1221 vt->capability |= V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
1222 vt->rangelow = radio_range[0] * 16000;
1223 vt->rangehigh = radio_range[1] * 16000;
1229 * tuner_s_tuner - Set the tuner's audio mode
1230 * @sd: pointer to struct v4l2_subdev
1231 * @vt: pointer to struct v4l2_tuner
1233 * Sets the audio mode if the tuner matches vt->type.
1234 * Note: vt->type should be initialized before calling it.
1235 * This is done by either video_ioctl2 or by the bridge driver.
1237 static int tuner_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
1239 struct tuner *t = to_tuner(sd);
1241 if (set_mode(t, vt->type))
1244 if (t->mode == V4L2_TUNER_RADIO) {
1245 t->audmode = vt->audmode;
1247 * For radio audmode can only be mono or stereo. Map any
1248 * other values to stereo. The actual tuner driver that is
1249 * called in set_radio_freq can decide to limit the audmode to
1250 * mono if only mono is supported.
1252 if (t->audmode != V4L2_TUNER_MODE_MONO &&
1253 t->audmode != V4L2_TUNER_MODE_STEREO)
1254 t->audmode = V4L2_TUNER_MODE_STEREO;
1261 static int tuner_log_status(struct v4l2_subdev *sd)
1263 struct tuner *t = to_tuner(sd);
1264 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
1266 if (analog_ops->tuner_status)
1267 analog_ops->tuner_status(&t->fe);
1271 #ifdef CONFIG_PM_SLEEP
1272 static int tuner_suspend(struct device *dev)
1274 struct i2c_client *c = to_i2c_client(dev);
1275 struct tuner *t = to_tuner(i2c_get_clientdata(c));
1276 struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
1278 tuner_dbg("suspend\n");
1280 if (!t->standby && analog_ops->standby)
1281 analog_ops->standby(&t->fe);
1286 static int tuner_resume(struct device *dev)
1288 struct i2c_client *c = to_i2c_client(dev);
1289 struct tuner *t = to_tuner(i2c_get_clientdata(c));
1291 tuner_dbg("resume\n");
1294 if (set_mode(t, t->mode) == 0)
1301 static int tuner_command(struct i2c_client *client, unsigned cmd, void *arg)
1303 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1305 /* TUNER_SET_CONFIG is still called by tuner-simple.c, so we have
1307 There must be a better way of doing this... */
1309 case TUNER_SET_CONFIG:
1310 return tuner_s_config(sd, arg);
1312 return -ENOIOCTLCMD;
1319 static const struct v4l2_subdev_core_ops tuner_core_ops = {
1320 .log_status = tuner_log_status,
1321 .s_std = tuner_s_std,
1322 .s_power = tuner_s_power,
1325 static const struct v4l2_subdev_tuner_ops tuner_tuner_ops = {
1326 .s_radio = tuner_s_radio,
1327 .g_tuner = tuner_g_tuner,
1328 .s_tuner = tuner_s_tuner,
1329 .s_frequency = tuner_s_frequency,
1330 .g_frequency = tuner_g_frequency,
1331 .s_type_addr = tuner_s_type_addr,
1332 .s_config = tuner_s_config,
1335 static const struct v4l2_subdev_ops tuner_ops = {
1336 .core = &tuner_core_ops,
1337 .tuner = &tuner_tuner_ops,
1341 * I2C structs and module init functions
1344 static const struct dev_pm_ops tuner_pm_ops = {
1345 SET_SYSTEM_SLEEP_PM_OPS(tuner_suspend, tuner_resume)
1348 static const struct i2c_device_id tuner_id[] = {
1349 { "tuner", }, /* autodetect */
1352 MODULE_DEVICE_TABLE(i2c, tuner_id);
1354 static struct i2c_driver tuner_driver = {
1356 .owner = THIS_MODULE,
1358 .pm = &tuner_pm_ops,
1360 .probe = tuner_probe,
1361 .remove = tuner_remove,
1362 .command = tuner_command,
1363 .id_table = tuner_id,
1366 module_i2c_driver(tuner_driver);
1368 MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
1369 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
1370 MODULE_LICENSE("GPL");