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-driver.h"
18 #define PREFIX "TEA5767 "
20 /* from tuner-core.c */
21 extern int tuner_debug;
24 struct tuner_i2c_props i2c_props;
27 /*****************************************************************************/
29 /******************************
30 * Write mode register values *
31 ******************************/
34 #define TEA5767_MUTE 0x80 /* Mutes output */
35 #define TEA5767_SEARCH 0x40 /* Activates station search */
36 /* Bits 0-5 for divider MSB */
39 /* Bits 0-7 for divider LSB */
43 /* Station search from botton to up */
44 #define TEA5767_SEARCH_UP 0x80
46 /* Searches with ADC output = 10 */
47 #define TEA5767_SRCH_HIGH_LVL 0x60
49 /* Searches with ADC output = 10 */
50 #define TEA5767_SRCH_MID_LVL 0x40
52 /* Searches with ADC output = 5 */
53 #define TEA5767_SRCH_LOW_LVL 0x20
55 /* if on, div=4*(Frf+Fif)/Fref otherwise, div=4*(Frf-Fif)/Freq) */
56 #define TEA5767_HIGH_LO_INJECT 0x10
59 #define TEA5767_MONO 0x08
61 /* Disable right channel and turns to mono */
62 #define TEA5767_MUTE_RIGHT 0x04
64 /* Disable left channel and turns to mono */
65 #define TEA5767_MUTE_LEFT 0x02
67 #define TEA5767_PORT1_HIGH 0x01
70 #define TEA5767_PORT2_HIGH 0x80
71 /* Chips stops working. Only I2C bus remains on */
72 #define TEA5767_STDBY 0x40
74 /* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */
75 #define TEA5767_JAPAN_BAND 0x20
77 /* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */
78 #define TEA5767_XTAL_32768 0x10
80 /* Cuts weak signals */
81 #define TEA5767_SOFT_MUTE 0x08
83 /* Activates high cut control */
84 #define TEA5767_HIGH_CUT_CTRL 0x04
86 /* Activates stereo noise control */
87 #define TEA5767_ST_NOISE_CTL 0x02
89 /* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */
90 #define TEA5767_SRCH_IND 0x01
94 /* By activating, it will use Xtal at 13 MHz as reference for divider */
95 #define TEA5767_PLLREF_ENABLE 0x80
97 /* By activating, deemphasis=50, or else, deemphasis of 50us */
98 #define TEA5767_DEEMPH_75 0X40
100 /*****************************
101 * Read mode register values *
102 *****************************/
105 #define TEA5767_READY_FLAG_MASK 0x80
106 #define TEA5767_BAND_LIMIT_MASK 0X40
107 /* Bits 0-5 for divider MSB after search or preset */
109 /* Second register */
110 /* Bits 0-7 for divider LSB after search or preset */
113 #define TEA5767_STEREO_MASK 0x80
114 #define TEA5767_IF_CNTR_MASK 0x7f
116 /* Fourth register */
117 #define TEA5767_ADC_LEVEL_MASK 0xf0
120 #define TEA5767_CHIP_ID_MASK 0x0f
123 /* Reserved for future extensions */
124 #define TEA5767_RESERVED_MASK 0xff
126 enum tea5767_xtal_freq {
127 TEA5767_LOW_LO_32768 = 0,
128 TEA5767_HIGH_LO_32768 = 1,
129 TEA5767_LOW_LO_13MHz = 2,
130 TEA5767_HIGH_LO_13MHz = 3,
134 /*****************************************************************************/
136 static void set_tv_freq(struct tuner *t, unsigned int freq)
138 tuner_warn("This tuner doesn't support TV freq.\n");
141 static void tea5767_status_dump(unsigned char *buffer)
143 unsigned int div, frq;
145 if (TEA5767_READY_FLAG_MASK & buffer[0])
146 printk(PREFIX "Ready Flag ON\n");
148 printk(PREFIX "Ready Flag OFF\n");
150 if (TEA5767_BAND_LIMIT_MASK & buffer[0])
151 printk(PREFIX "Tuner at band limit\n");
153 printk(PREFIX "Tuner not at band limit\n");
155 div = ((buffer[0] & 0x3f) << 8) | buffer[1];
157 switch (TEA5767_HIGH_LO_32768) {
158 case TEA5767_HIGH_LO_13MHz:
159 frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */
161 case TEA5767_LOW_LO_13MHz:
162 frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */
164 case TEA5767_LOW_LO_32768:
165 frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */
167 case TEA5767_HIGH_LO_32768:
169 frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */
172 buffer[0] = (div >> 8) & 0x3f;
173 buffer[1] = div & 0xff;
175 printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n",
176 frq / 1000, frq % 1000, div);
178 if (TEA5767_STEREO_MASK & buffer[2])
179 printk(PREFIX "Stereo\n");
181 printk(PREFIX "Mono\n");
183 printk(PREFIX "IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);
185 printk(PREFIX "ADC Level = %d\n",
186 (buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
188 printk(PREFIX "Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));
190 printk(PREFIX "Reserved = 0x%02x\n",
191 (buffer[4] & TEA5767_RESERVED_MASK));
194 /* Freq should be specifyed at 62.5 Hz */
195 static void set_radio_freq(struct tuner *t, unsigned int frq)
197 struct tea5767_priv *priv = t->priv;
198 unsigned char buffer[5];
202 tuner_dbg (PREFIX "radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);
204 /* Rounds freq to next decimal value - for 62.5 KHz step */
205 /* frq = 20*(frq/16)+radio_frq[frq%16]; */
207 buffer[2] = TEA5767_PORT1_HIGH;
208 buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |
209 TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND;
212 if (t->audmode == V4L2_TUNER_MODE_MONO) {
213 tuner_dbg("TEA5767 set to mono\n");
214 buffer[2] |= TEA5767_MONO;
216 tuner_dbg("TEA5767 set to stereo\n");
219 /* Should be replaced */
220 switch (TEA5767_HIGH_LO_32768) {
221 case TEA5767_HIGH_LO_13MHz:
222 tuner_dbg ("TEA5767 radio HIGH LO inject xtal @ 13 MHz\n");
223 buffer[2] |= TEA5767_HIGH_LO_INJECT;
224 buffer[4] |= TEA5767_PLLREF_ENABLE;
225 div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;
227 case TEA5767_LOW_LO_13MHz:
228 tuner_dbg ("TEA5767 radio LOW LO inject xtal @ 13 MHz\n");
230 buffer[4] |= TEA5767_PLLREF_ENABLE;
231 div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;
233 case TEA5767_LOW_LO_32768:
234 tuner_dbg ("TEA5767 radio LOW LO inject xtal @ 32,768 MHz\n");
235 buffer[3] |= TEA5767_XTAL_32768;
236 /* const 700=4000*175 Khz - to adjust freq to right value */
237 div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15;
239 case TEA5767_HIGH_LO_32768:
241 tuner_dbg ("TEA5767 radio HIGH LO inject xtal @ 32,768 MHz\n");
243 buffer[2] |= TEA5767_HIGH_LO_INJECT;
244 buffer[3] |= TEA5767_XTAL_32768;
245 div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;
248 buffer[0] = (div >> 8) & 0x3f;
249 buffer[1] = div & 0xff;
251 if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
252 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
255 if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
256 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
258 tea5767_status_dump(buffer);
262 static int tea5767_signal(struct tuner *t)
264 unsigned char buffer[5];
266 struct tea5767_priv *priv = t->priv;
268 memset(buffer, 0, sizeof(buffer));
269 if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
270 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
272 return ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);
275 static int tea5767_stereo(struct tuner *t)
277 unsigned char buffer[5];
279 struct tea5767_priv *priv = t->priv;
281 memset(buffer, 0, sizeof(buffer));
282 if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
283 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
285 rc = buffer[2] & TEA5767_STEREO_MASK;
287 tuner_dbg("TEA5767 radio ST GET = %02x\n", rc);
289 return ((buffer[2] & TEA5767_STEREO_MASK) ? V4L2_TUNER_SUB_STEREO : 0);
292 static void tea5767_standby(struct tuner *t)
294 unsigned char buffer[5];
295 struct tea5767_priv *priv = t->priv;
298 div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */
299 buffer[0] = (div >> 8) & 0x3f;
300 buffer[1] = div & 0xff;
301 buffer[2] = TEA5767_PORT1_HIGH;
302 buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |
303 TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND | TEA5767_STDBY;
306 if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
307 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
310 int tea5767_autodetection(struct tuner *t)
312 struct tuner_i2c_props i2c = { .adap = t->i2c.adapter, .addr = t->i2c.addr };
313 unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
316 if ((rc = tuner_i2c_xfer_send(&i2c, buffer, 7))< 5) {
317 tuner_warn("It is not a TEA5767. Received %i bytes.\n", rc);
321 /* If all bytes are the same then it's a TV tuner and not a tea5767 */
322 if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&
323 buffer[0] == buffer[3] && buffer[0] == buffer[4]) {
324 tuner_warn("All bytes are equal. It is not a TEA5767\n");
329 * Byte 4: bit 3:1 : CI (Chip Identification) == 0
330 * bit 0 : internally set to 0
331 * Byte 5: bit 7:0 : == 0
333 if (((buffer[3] & 0x0f) != 0x00) || (buffer[4] != 0x00)) {
334 tuner_warn("Chip ID is not zero. It is not a TEA5767\n");
338 /* It seems that tea5767 returns 0xff after the 5th byte */
339 if ((buffer[5] != 0xff) || (buffer[6] != 0xff)) {
340 tuner_warn("Returned more than 5 bytes. It is not a TEA5767\n");
344 tuner_warn("TEA5767 detected.\n");
348 static void tea5767_release(struct tuner *t)
354 static struct tuner_operations tea5767_tuner_ops = {
355 .set_tv_freq = set_tv_freq,
356 .set_radio_freq = set_radio_freq,
357 .has_signal = tea5767_signal,
358 .is_stereo = tea5767_stereo,
359 .standby = tea5767_standby,
360 .release = tea5767_release,
363 int tea5767_tuner_init(struct tuner *t)
365 struct tea5767_priv *priv = NULL;
367 priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL);
372 priv->i2c_props.addr = t->i2c.addr;
373 priv->i2c_props.adap = t->i2c.adapter;
375 tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5767HN FM Radio");
376 strlcpy(t->i2c.name, "tea5767", sizeof(t->i2c.name));
378 memcpy(&t->ops, &tea5767_tuner_ops, sizeof(struct tuner_operations));