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/delay.h>
15 #include <linux/videodev.h>
16 #include "tuner-i2c.h"
20 module_param(debug, int, 0644);
21 MODULE_PARM_DESC(debug, "enable verbose debug messages");
23 /*****************************************************************************/
26 struct tuner_i2c_props i2c_props;
28 struct tea5767_ctrl ctrl;
31 /*****************************************************************************/
33 /******************************
34 * Write mode register values *
35 ******************************/
38 #define TEA5767_MUTE 0x80 /* Mutes output */
39 #define TEA5767_SEARCH 0x40 /* Activates station search */
40 /* Bits 0-5 for divider MSB */
43 /* Bits 0-7 for divider LSB */
47 /* Station search from botton to up */
48 #define TEA5767_SEARCH_UP 0x80
50 /* Searches with ADC output = 10 */
51 #define TEA5767_SRCH_HIGH_LVL 0x60
53 /* Searches with ADC output = 10 */
54 #define TEA5767_SRCH_MID_LVL 0x40
56 /* Searches with ADC output = 5 */
57 #define TEA5767_SRCH_LOW_LVL 0x20
59 /* if on, div=4*(Frf+Fif)/Fref otherwise, div=4*(Frf-Fif)/Freq) */
60 #define TEA5767_HIGH_LO_INJECT 0x10
63 #define TEA5767_MONO 0x08
65 /* Disable right channel and turns to mono */
66 #define TEA5767_MUTE_RIGHT 0x04
68 /* Disable left channel and turns to mono */
69 #define TEA5767_MUTE_LEFT 0x02
71 #define TEA5767_PORT1_HIGH 0x01
74 #define TEA5767_PORT2_HIGH 0x80
75 /* Chips stops working. Only I2C bus remains on */
76 #define TEA5767_STDBY 0x40
78 /* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */
79 #define TEA5767_JAPAN_BAND 0x20
81 /* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */
82 #define TEA5767_XTAL_32768 0x10
84 /* Cuts weak signals */
85 #define TEA5767_SOFT_MUTE 0x08
87 /* Activates high cut control */
88 #define TEA5767_HIGH_CUT_CTRL 0x04
90 /* Activates stereo noise control */
91 #define TEA5767_ST_NOISE_CTL 0x02
93 /* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */
94 #define TEA5767_SRCH_IND 0x01
98 /* By activating, it will use Xtal at 13 MHz as reference for divider */
99 #define TEA5767_PLLREF_ENABLE 0x80
101 /* By activating, deemphasis=50, or else, deemphasis of 50us */
102 #define TEA5767_DEEMPH_75 0X40
104 /*****************************
105 * Read mode register values *
106 *****************************/
109 #define TEA5767_READY_FLAG_MASK 0x80
110 #define TEA5767_BAND_LIMIT_MASK 0X40
111 /* Bits 0-5 for divider MSB after search or preset */
113 /* Second register */
114 /* Bits 0-7 for divider LSB after search or preset */
117 #define TEA5767_STEREO_MASK 0x80
118 #define TEA5767_IF_CNTR_MASK 0x7f
120 /* Fourth register */
121 #define TEA5767_ADC_LEVEL_MASK 0xf0
124 #define TEA5767_CHIP_ID_MASK 0x0f
127 /* Reserved for future extensions */
128 #define TEA5767_RESERVED_MASK 0xff
130 /*****************************************************************************/
132 static void tea5767_status_dump(struct tea5767_priv *priv,
133 unsigned char *buffer)
135 unsigned int div, frq;
137 if (TEA5767_READY_FLAG_MASK & buffer[0])
138 tuner_info("Ready Flag ON\n");
140 tuner_info("Ready Flag OFF\n");
142 if (TEA5767_BAND_LIMIT_MASK & buffer[0])
143 tuner_info("Tuner at band limit\n");
145 tuner_info("Tuner not at band limit\n");
147 div = ((buffer[0] & 0x3f) << 8) | buffer[1];
149 switch (priv->ctrl.xtal_freq) {
150 case TEA5767_HIGH_LO_13MHz:
151 frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */
153 case TEA5767_LOW_LO_13MHz:
154 frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */
156 case TEA5767_LOW_LO_32768:
157 frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */
159 case TEA5767_HIGH_LO_32768:
161 frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */
164 buffer[0] = (div >> 8) & 0x3f;
165 buffer[1] = div & 0xff;
167 tuner_info("Frequency %d.%03d KHz (divider = 0x%04x)\n",
168 frq / 1000, frq % 1000, div);
170 if (TEA5767_STEREO_MASK & buffer[2])
171 tuner_info("Stereo\n");
173 tuner_info("Mono\n");
175 tuner_info("IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);
177 tuner_info("ADC Level = %d\n",
178 (buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
180 tuner_info("Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));
182 tuner_info("Reserved = 0x%02x\n",
183 (buffer[4] & TEA5767_RESERVED_MASK));
186 /* Freq should be specifyed at 62.5 Hz */
187 static int set_radio_freq(struct dvb_frontend *fe,
188 struct analog_parameters *params)
190 struct tea5767_priv *priv = fe->tuner_priv;
191 unsigned int frq = params->frequency;
192 unsigned char buffer[5];
196 tuner_dbg("radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);
200 if (priv->ctrl.port1)
201 buffer[2] |= TEA5767_PORT1_HIGH;
203 if (params->audmode == V4L2_TUNER_MODE_MONO) {
204 tuner_dbg("TEA5767 set to mono\n");
205 buffer[2] |= TEA5767_MONO;
207 tuner_dbg("TEA5767 set to stereo\n");
213 if (priv->ctrl.port2)
214 buffer[3] |= TEA5767_PORT2_HIGH;
216 if (priv->ctrl.high_cut)
217 buffer[3] |= TEA5767_HIGH_CUT_CTRL;
219 if (priv->ctrl.st_noise)
220 buffer[3] |= TEA5767_ST_NOISE_CTL;
222 if (priv->ctrl.soft_mute)
223 buffer[3] |= TEA5767_SOFT_MUTE;
225 if (priv->ctrl.japan_band)
226 buffer[3] |= TEA5767_JAPAN_BAND;
230 if (priv->ctrl.deemph_75)
231 buffer[4] |= TEA5767_DEEMPH_75;
233 if (priv->ctrl.pllref)
234 buffer[4] |= TEA5767_PLLREF_ENABLE;
237 /* Rounds freq to next decimal value - for 62.5 KHz step */
238 /* frq = 20*(frq/16)+radio_frq[frq%16]; */
240 switch (priv->ctrl.xtal_freq) {
241 case TEA5767_HIGH_LO_13MHz:
242 tuner_dbg("radio HIGH LO inject xtal @ 13 MHz\n");
243 buffer[2] |= TEA5767_HIGH_LO_INJECT;
244 div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;
246 case TEA5767_LOW_LO_13MHz:
247 tuner_dbg("radio LOW LO inject xtal @ 13 MHz\n");
249 div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;
251 case TEA5767_LOW_LO_32768:
252 tuner_dbg("radio LOW LO inject xtal @ 32,768 MHz\n");
253 buffer[3] |= TEA5767_XTAL_32768;
254 /* const 700=4000*175 Khz - to adjust freq to right value */
255 div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15;
257 case TEA5767_HIGH_LO_32768:
259 tuner_dbg("radio HIGH LO inject xtal @ 32,768 MHz\n");
261 buffer[2] |= TEA5767_HIGH_LO_INJECT;
262 buffer[3] |= TEA5767_XTAL_32768;
263 div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;
266 buffer[0] = (div >> 8) & 0x3f;
267 buffer[1] = div & 0xff;
269 if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
270 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
273 if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
274 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
276 tea5767_status_dump(priv, buffer);
279 priv->frequency = frq * 125 / 2;
284 static int tea5767_read_status(struct dvb_frontend *fe, char *buffer)
286 struct tea5767_priv *priv = fe->tuner_priv;
289 memset(buffer, 0, 5);
290 if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) {
291 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
298 static inline int tea5767_signal(struct dvb_frontend *fe, const char *buffer)
300 struct tea5767_priv *priv = fe->tuner_priv;
302 int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);
304 tuner_dbg("Signal strength: %d\n", signal);
309 static inline int tea5767_stereo(struct dvb_frontend *fe, const char *buffer)
311 struct tea5767_priv *priv = fe->tuner_priv;
313 int stereo = buffer[2] & TEA5767_STEREO_MASK;
315 tuner_dbg("Radio ST GET = %02x\n", stereo);
317 return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
320 static int tea5767_get_status(struct dvb_frontend *fe, u32 *status)
322 unsigned char buffer[5];
326 if (0 == tea5767_read_status(fe, buffer)) {
327 if (tea5767_signal(fe, buffer))
328 *status = TUNER_STATUS_LOCKED;
329 if (tea5767_stereo(fe, buffer))
330 *status |= TUNER_STATUS_STEREO;
336 static int tea5767_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
338 unsigned char buffer[5];
342 if (0 == tea5767_read_status(fe, buffer))
343 *strength = tea5767_signal(fe, buffer);
348 static int tea5767_standby(struct dvb_frontend *fe)
350 unsigned char buffer[5];
351 struct tea5767_priv *priv = fe->tuner_priv;
354 div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */
355 buffer[0] = (div >> 8) & 0x3f;
356 buffer[1] = div & 0xff;
357 buffer[2] = TEA5767_PORT1_HIGH;
358 buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |
359 TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND | TEA5767_STDBY;
362 if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
363 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
368 int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
370 struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
371 unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
374 if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) {
375 printk(KERN_WARNING "It is not a TEA5767. Received %i bytes.\n", rc);
379 /* If all bytes are the same then it's a TV tuner and not a tea5767 */
380 if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&
381 buffer[0] == buffer[3] && buffer[0] == buffer[4]) {
382 printk(KERN_WARNING "All bytes are equal. It is not a TEA5767\n");
387 * Byte 4: bit 3:1 : CI (Chip Identification) == 0
388 * bit 0 : internally set to 0
389 * Byte 5: bit 7:0 : == 0
391 if (((buffer[3] & 0x0f) != 0x00) || (buffer[4] != 0x00)) {
392 printk(KERN_WARNING "Chip ID is not zero. It is not a TEA5767\n");
400 static int tea5767_release(struct dvb_frontend *fe)
402 kfree(fe->tuner_priv);
403 fe->tuner_priv = NULL;
408 static int tea5767_get_frequency(struct dvb_frontend *fe, u32 *frequency)
410 struct tea5767_priv *priv = fe->tuner_priv;
411 *frequency = priv->frequency;
416 static int tea5767_set_config (struct dvb_frontend *fe, void *priv_cfg)
418 struct tea5767_priv *priv = fe->tuner_priv;
420 memcpy(&priv->ctrl, priv_cfg, sizeof(priv->ctrl));
425 static struct dvb_tuner_ops tea5767_tuner_ops = {
427 .name = "tea5767", // Philips TEA5767HN FM Radio
430 .set_analog_params = set_radio_freq,
431 .set_config = tea5767_set_config,
432 .sleep = tea5767_standby,
433 .release = tea5767_release,
434 .get_frequency = tea5767_get_frequency,
435 .get_status = tea5767_get_status,
436 .get_rf_strength = tea5767_get_rf_strength,
439 struct dvb_frontend *tea5767_attach(struct dvb_frontend *fe,
440 struct i2c_adapter* i2c_adap,
443 struct tea5767_priv *priv = NULL;
445 priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL);
448 fe->tuner_priv = priv;
450 priv->i2c_props.addr = i2c_addr;
451 priv->i2c_props.adap = i2c_adap;
452 priv->i2c_props.name = "tea5767";
454 priv->ctrl.xtal_freq = TEA5767_HIGH_LO_32768;
455 priv->ctrl.port1 = 1;
456 priv->ctrl.port2 = 1;
457 priv->ctrl.high_cut = 1;
458 priv->ctrl.st_noise = 1;
459 priv->ctrl.japan_band = 1;
461 memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops,
462 sizeof(struct dvb_tuner_ops));
464 tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio");
469 EXPORT_SYMBOL_GPL(tea5767_attach);
470 EXPORT_SYMBOL_GPL(tea5767_autodetection);
472 MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver");
473 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
474 MODULE_LICENSE("GPL");