Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / media / common / tuners / tea5767.c
blob36e85d81acb2ca10c953ab83966502c138035392
1 /*
2 * For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
3 * I2C address is allways 0xC0.
6 * Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@infradead.org)
7 * This code is placed under the terms of the GNU General Public License
9 * tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa
10 * from their contributions on DScaler.
13 #include <linux/i2c.h>
14 #include <linux/slab.h>
15 #include <linux/delay.h>
16 #include <linux/videodev2.h>
17 #include "tuner-i2c.h"
18 #include "tea5767.h"
20 static int debug;
21 module_param(debug, int, 0644);
22 MODULE_PARM_DESC(debug, "enable verbose debug messages");
24 /*****************************************************************************/
26 struct tea5767_priv {
27 struct tuner_i2c_props i2c_props;
28 u32 frequency;
29 struct tea5767_ctrl ctrl;
32 /*****************************************************************************/
34 /******************************
35 * Write mode register values *
36 ******************************/
38 /* First register */
39 #define TEA5767_MUTE 0x80 /* Mutes output */
40 #define TEA5767_SEARCH 0x40 /* Activates station search */
41 /* Bits 0-5 for divider MSB */
43 /* Second register */
44 /* Bits 0-7 for divider LSB */
46 /* Third register */
48 /* Station search from botton to up */
49 #define TEA5767_SEARCH_UP 0x80
51 /* Searches with ADC output = 10 */
52 #define TEA5767_SRCH_HIGH_LVL 0x60
54 /* Searches with ADC output = 10 */
55 #define TEA5767_SRCH_MID_LVL 0x40
57 /* Searches with ADC output = 5 */
58 #define TEA5767_SRCH_LOW_LVL 0x20
60 /* if on, div=4*(Frf+Fif)/Fref otherwise, div=4*(Frf-Fif)/Freq) */
61 #define TEA5767_HIGH_LO_INJECT 0x10
63 /* Disable stereo */
64 #define TEA5767_MONO 0x08
66 /* Disable right channel and turns to mono */
67 #define TEA5767_MUTE_RIGHT 0x04
69 /* Disable left channel and turns to mono */
70 #define TEA5767_MUTE_LEFT 0x02
72 #define TEA5767_PORT1_HIGH 0x01
74 /* Fourth register */
75 #define TEA5767_PORT2_HIGH 0x80
76 /* Chips stops working. Only I2C bus remains on */
77 #define TEA5767_STDBY 0x40
79 /* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */
80 #define TEA5767_JAPAN_BAND 0x20
82 /* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */
83 #define TEA5767_XTAL_32768 0x10
85 /* Cuts weak signals */
86 #define TEA5767_SOFT_MUTE 0x08
88 /* Activates high cut control */
89 #define TEA5767_HIGH_CUT_CTRL 0x04
91 /* Activates stereo noise control */
92 #define TEA5767_ST_NOISE_CTL 0x02
94 /* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */
95 #define TEA5767_SRCH_IND 0x01
97 /* Fifth register */
99 /* By activating, it will use Xtal at 13 MHz as reference for divider */
100 #define TEA5767_PLLREF_ENABLE 0x80
102 /* By activating, deemphasis=50, or else, deemphasis of 50us */
103 #define TEA5767_DEEMPH_75 0X40
105 /*****************************
106 * Read mode register values *
107 *****************************/
109 /* First register */
110 #define TEA5767_READY_FLAG_MASK 0x80
111 #define TEA5767_BAND_LIMIT_MASK 0X40
112 /* Bits 0-5 for divider MSB after search or preset */
114 /* Second register */
115 /* Bits 0-7 for divider LSB after search or preset */
117 /* Third register */
118 #define TEA5767_STEREO_MASK 0x80
119 #define TEA5767_IF_CNTR_MASK 0x7f
121 /* Fourth register */
122 #define TEA5767_ADC_LEVEL_MASK 0xf0
124 /* should be 0 */
125 #define TEA5767_CHIP_ID_MASK 0x0f
127 /* Fifth register */
128 /* Reserved for future extensions */
129 #define TEA5767_RESERVED_MASK 0xff
131 /*****************************************************************************/
133 static void tea5767_status_dump(struct tea5767_priv *priv,
134 unsigned char *buffer)
136 unsigned int div, frq;
138 if (TEA5767_READY_FLAG_MASK & buffer[0])
139 tuner_info("Ready Flag ON\n");
140 else
141 tuner_info("Ready Flag OFF\n");
143 if (TEA5767_BAND_LIMIT_MASK & buffer[0])
144 tuner_info("Tuner at band limit\n");
145 else
146 tuner_info("Tuner not at band limit\n");
148 div = ((buffer[0] & 0x3f) << 8) | buffer[1];
150 switch (priv->ctrl.xtal_freq) {
151 case TEA5767_HIGH_LO_13MHz:
152 frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */
153 break;
154 case TEA5767_LOW_LO_13MHz:
155 frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */
156 break;
157 case TEA5767_LOW_LO_32768:
158 frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */
159 break;
160 case TEA5767_HIGH_LO_32768:
161 default:
162 frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */
163 break;
165 buffer[0] = (div >> 8) & 0x3f;
166 buffer[1] = div & 0xff;
168 tuner_info("Frequency %d.%03d KHz (divider = 0x%04x)\n",
169 frq / 1000, frq % 1000, div);
171 if (TEA5767_STEREO_MASK & buffer[2])
172 tuner_info("Stereo\n");
173 else
174 tuner_info("Mono\n");
176 tuner_info("IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);
178 tuner_info("ADC Level = %d\n",
179 (buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
181 tuner_info("Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));
183 tuner_info("Reserved = 0x%02x\n",
184 (buffer[4] & TEA5767_RESERVED_MASK));
187 /* Freq should be specifyed at 62.5 Hz */
188 static int set_radio_freq(struct dvb_frontend *fe,
189 struct analog_parameters *params)
191 struct tea5767_priv *priv = fe->tuner_priv;
192 unsigned int frq = params->frequency;
193 unsigned char buffer[5];
194 unsigned div;
195 int rc;
197 tuner_dbg("radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);
199 buffer[2] = 0;
201 if (priv->ctrl.port1)
202 buffer[2] |= TEA5767_PORT1_HIGH;
204 if (params->audmode == V4L2_TUNER_MODE_MONO) {
205 tuner_dbg("TEA5767 set to mono\n");
206 buffer[2] |= TEA5767_MONO;
207 } else {
208 tuner_dbg("TEA5767 set to stereo\n");
212 buffer[3] = 0;
214 if (priv->ctrl.port2)
215 buffer[3] |= TEA5767_PORT2_HIGH;
217 if (priv->ctrl.high_cut)
218 buffer[3] |= TEA5767_HIGH_CUT_CTRL;
220 if (priv->ctrl.st_noise)
221 buffer[3] |= TEA5767_ST_NOISE_CTL;
223 if (priv->ctrl.soft_mute)
224 buffer[3] |= TEA5767_SOFT_MUTE;
226 if (priv->ctrl.japan_band)
227 buffer[3] |= TEA5767_JAPAN_BAND;
229 buffer[4] = 0;
231 if (priv->ctrl.deemph_75)
232 buffer[4] |= TEA5767_DEEMPH_75;
234 if (priv->ctrl.pllref)
235 buffer[4] |= TEA5767_PLLREF_ENABLE;
238 /* Rounds freq to next decimal value - for 62.5 KHz step */
239 /* frq = 20*(frq/16)+radio_frq[frq%16]; */
241 switch (priv->ctrl.xtal_freq) {
242 case TEA5767_HIGH_LO_13MHz:
243 tuner_dbg("radio HIGH LO inject xtal @ 13 MHz\n");
244 buffer[2] |= TEA5767_HIGH_LO_INJECT;
245 div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;
246 break;
247 case TEA5767_LOW_LO_13MHz:
248 tuner_dbg("radio LOW LO inject xtal @ 13 MHz\n");
250 div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;
251 break;
252 case TEA5767_LOW_LO_32768:
253 tuner_dbg("radio LOW LO inject xtal @ 32,768 MHz\n");
254 buffer[3] |= TEA5767_XTAL_32768;
255 /* const 700=4000*175 Khz - to adjust freq to right value */
256 div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15;
257 break;
258 case TEA5767_HIGH_LO_32768:
259 default:
260 tuner_dbg("radio HIGH LO inject xtal @ 32,768 MHz\n");
262 buffer[2] |= TEA5767_HIGH_LO_INJECT;
263 buffer[3] |= TEA5767_XTAL_32768;
264 div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;
265 break;
267 buffer[0] = (div >> 8) & 0x3f;
268 buffer[1] = div & 0xff;
270 if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
271 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
273 if (debug) {
274 if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
275 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
276 else
277 tea5767_status_dump(priv, buffer);
280 priv->frequency = frq * 125 / 2;
282 return 0;
285 static int tea5767_read_status(struct dvb_frontend *fe, char *buffer)
287 struct tea5767_priv *priv = fe->tuner_priv;
288 int rc;
290 memset(buffer, 0, 5);
291 if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) {
292 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
293 return -EREMOTEIO;
296 return 0;
299 static inline int tea5767_signal(struct dvb_frontend *fe, const char *buffer)
301 struct tea5767_priv *priv = fe->tuner_priv;
303 int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);
305 tuner_dbg("Signal strength: %d\n", signal);
307 return signal;
310 static inline int tea5767_stereo(struct dvb_frontend *fe, const char *buffer)
312 struct tea5767_priv *priv = fe->tuner_priv;
314 int stereo = buffer[2] & TEA5767_STEREO_MASK;
316 tuner_dbg("Radio ST GET = %02x\n", stereo);
318 return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
321 static int tea5767_get_status(struct dvb_frontend *fe, u32 *status)
323 unsigned char buffer[5];
325 *status = 0;
327 if (0 == tea5767_read_status(fe, buffer)) {
328 if (tea5767_signal(fe, buffer))
329 *status = TUNER_STATUS_LOCKED;
330 if (tea5767_stereo(fe, buffer))
331 *status |= TUNER_STATUS_STEREO;
334 return 0;
337 static int tea5767_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
339 unsigned char buffer[5];
341 *strength = 0;
343 if (0 == tea5767_read_status(fe, buffer))
344 *strength = tea5767_signal(fe, buffer);
346 return 0;
349 static int tea5767_standby(struct dvb_frontend *fe)
351 unsigned char buffer[5];
352 struct tea5767_priv *priv = fe->tuner_priv;
353 unsigned div, rc;
355 div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */
356 buffer[0] = (div >> 8) & 0x3f;
357 buffer[1] = div & 0xff;
358 buffer[2] = TEA5767_PORT1_HIGH;
359 buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |
360 TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND | TEA5767_STDBY;
361 buffer[4] = 0;
363 if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
364 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
366 return 0;
369 int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
371 struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
372 unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
373 int rc;
375 if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) {
376 printk(KERN_WARNING "It is not a TEA5767. Received %i bytes.\n", rc);
377 return -EINVAL;
380 /* If all bytes are the same then it's a TV tuner and not a tea5767 */
381 if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&
382 buffer[0] == buffer[3] && buffer[0] == buffer[4]) {
383 printk(KERN_WARNING "All bytes are equal. It is not a TEA5767\n");
384 return -EINVAL;
387 /* Status bytes:
388 * Byte 4: bit 3:1 : CI (Chip Identification) == 0
389 * bit 0 : internally set to 0
390 * Byte 5: bit 7:0 : == 0
392 if (((buffer[3] & 0x0f) != 0x00) || (buffer[4] != 0x00)) {
393 printk(KERN_WARNING "Chip ID is not zero. It is not a TEA5767\n");
394 return -EINVAL;
398 return 0;
401 static int tea5767_release(struct dvb_frontend *fe)
403 kfree(fe->tuner_priv);
404 fe->tuner_priv = NULL;
406 return 0;
409 static int tea5767_get_frequency(struct dvb_frontend *fe, u32 *frequency)
411 struct tea5767_priv *priv = fe->tuner_priv;
412 *frequency = priv->frequency;
414 return 0;
417 static int tea5767_set_config (struct dvb_frontend *fe, void *priv_cfg)
419 struct tea5767_priv *priv = fe->tuner_priv;
421 memcpy(&priv->ctrl, priv_cfg, sizeof(priv->ctrl));
423 return 0;
426 static struct dvb_tuner_ops tea5767_tuner_ops = {
427 .info = {
428 .name = "tea5767", // Philips TEA5767HN FM Radio
431 .set_analog_params = set_radio_freq,
432 .set_config = tea5767_set_config,
433 .sleep = tea5767_standby,
434 .release = tea5767_release,
435 .get_frequency = tea5767_get_frequency,
436 .get_status = tea5767_get_status,
437 .get_rf_strength = tea5767_get_rf_strength,
440 struct dvb_frontend *tea5767_attach(struct dvb_frontend *fe,
441 struct i2c_adapter* i2c_adap,
442 u8 i2c_addr)
444 struct tea5767_priv *priv = NULL;
446 priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL);
447 if (priv == NULL)
448 return NULL;
449 fe->tuner_priv = priv;
451 priv->i2c_props.addr = i2c_addr;
452 priv->i2c_props.adap = i2c_adap;
453 priv->i2c_props.name = "tea5767";
455 priv->ctrl.xtal_freq = TEA5767_HIGH_LO_32768;
456 priv->ctrl.port1 = 1;
457 priv->ctrl.port2 = 1;
458 priv->ctrl.high_cut = 1;
459 priv->ctrl.st_noise = 1;
460 priv->ctrl.japan_band = 1;
462 memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops,
463 sizeof(struct dvb_tuner_ops));
465 tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio");
467 return fe;
470 EXPORT_SYMBOL_GPL(tea5767_attach);
471 EXPORT_SYMBOL_GPL(tea5767_autodetection);
473 MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver");
474 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
475 MODULE_LICENSE("GPL");