Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / media / common / tuners / tea5761.c
blobbf78cb9fc52c2b5c5c497650096f0e780a481f69
1 /*
2 * For Philips TEA5761 FM Chip
3 * I2C address is allways 0x20 (0x10 at 7-bit mode).
5 * Copyright (c) 2005-2007 Mauro Carvalho Chehab (mchehab@infradead.org)
6 * This code is placed under the terms of the GNUv2 General Public License
8 */
10 #include <linux/i2c.h>
11 #include <linux/slab.h>
12 #include <linux/delay.h>
13 #include <linux/videodev2.h>
14 #include <media/tuner.h>
15 #include "tuner-i2c.h"
16 #include "tea5761.h"
18 static int debug;
19 module_param(debug, int, 0644);
20 MODULE_PARM_DESC(debug, "enable verbose debug messages");
22 struct tea5761_priv {
23 struct tuner_i2c_props i2c_props;
25 u32 frequency;
26 bool standby;
29 /*****************************************************************************/
31 /***************************
32 * TEA5761HN I2C registers *
33 ***************************/
35 /* INTREG - Read: bytes 0 and 1 / Write: byte 0 */
37 /* first byte for reading */
38 #define TEA5761_INTREG_IFFLAG 0x10
39 #define TEA5761_INTREG_LEVFLAG 0x8
40 #define TEA5761_INTREG_FRRFLAG 0x2
41 #define TEA5761_INTREG_BLFLAG 0x1
43 /* second byte for reading / byte for writing */
44 #define TEA5761_INTREG_IFMSK 0x10
45 #define TEA5761_INTREG_LEVMSK 0x8
46 #define TEA5761_INTREG_FRMSK 0x2
47 #define TEA5761_INTREG_BLMSK 0x1
49 /* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */
51 /* First byte */
52 #define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */
53 #define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */
55 /* Bits 0-5 for divider MSB */
57 /* Second byte */
58 /* Bits 0-7 for divider LSB */
60 /* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */
62 /* first byte */
64 #define TEA5761_TNCTRL_PUPD_0 0x40 /* Power UP/Power Down MSB */
65 #define TEA5761_TNCTRL_BLIM 0X20 /* 1= Japan Frequencies, 0= European frequencies */
66 #define TEA5761_TNCTRL_SWPM 0x10 /* 1= software port is FRRFLAG */
67 #define TEA5761_TNCTRL_IFCTC 0x08 /* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */
68 #define TEA5761_TNCTRL_AFM 0x04
69 #define TEA5761_TNCTRL_SMUTE 0x02 /* 1= Soft mute */
70 #define TEA5761_TNCTRL_SNC 0x01
72 /* second byte */
74 #define TEA5761_TNCTRL_MU 0x80 /* 1=Hard mute */
75 #define TEA5761_TNCTRL_SSL_1 0x40
76 #define TEA5761_TNCTRL_SSL_0 0x20
77 #define TEA5761_TNCTRL_HLSI 0x10
78 #define TEA5761_TNCTRL_MST 0x08 /* 1 = mono */
79 #define TEA5761_TNCTRL_SWP 0x04
80 #define TEA5761_TNCTRL_DTC 0x02 /* 1 = deemphasis 50 us, 0 = deemphasis 75 us */
81 #define TEA5761_TNCTRL_AHLSI 0x01
83 /* FRQCHECK - Read: bytes 6 and 7 */
84 /* First byte */
86 /* Bits 0-5 for divider MSB */
88 /* Second byte */
89 /* Bits 0-7 for divider LSB */
91 /* TUNCHECK - Read: bytes 8 and 9 */
93 /* First byte */
94 #define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */
95 #define TEA5761_TUNCHECK_TUNTO 0x01
97 /* Second byte */
98 #define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */
99 #define TEA5761_TUNCHECK_LD 0x08
100 #define TEA5761_TUNCHECK_STEREO 0x04
102 /* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */
104 /* All zero = no test mode */
106 /* MANID - Read: bytes 12 and 13 */
108 /* First byte - should be 0x10 */
109 #define TEA5767_MANID_VERSION_MASK 0xf0 /* Version = 1 */
110 #define TEA5767_MANID_ID_MSB_MASK 0x0f /* Manufacurer ID - should be 0 */
112 /* Second byte - Should be 0x2b */
114 #define TEA5767_MANID_ID_LSB_MASK 0xfe /* Manufacturer ID - should be 0x15 */
115 #define TEA5767_MANID_IDAV 0x01 /* 1 = Chip has ID, 0 = Chip has no ID */
117 /* Chip ID - Read: bytes 14 and 15 */
119 /* First byte - should be 0x57 */
121 /* Second byte - should be 0x61 */
123 /*****************************************************************************/
125 #define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */
126 static void tea5761_status_dump(unsigned char *buffer)
128 unsigned int div, frq;
130 div = ((buffer[2] & 0x3f) << 8) | buffer[3];
132 frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */
134 printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n",
135 frq / 1000, frq % 1000, div);
138 /* Freq should be specifyed at 62.5 Hz */
139 static int __set_radio_freq(struct dvb_frontend *fe,
140 unsigned int freq,
141 bool mono)
143 struct tea5761_priv *priv = fe->tuner_priv;
144 unsigned int frq = freq;
145 unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
146 unsigned div;
147 int rc;
149 tuner_dbg("radio freq counter %d\n", frq);
151 if (priv->standby) {
152 tuner_dbg("TEA5761 set to standby mode\n");
153 buffer[5] |= TEA5761_TNCTRL_MU;
154 } else {
155 buffer[4] |= TEA5761_TNCTRL_PUPD_0;
159 if (mono) {
160 tuner_dbg("TEA5761 set to mono\n");
161 buffer[5] |= TEA5761_TNCTRL_MST;
162 } else {
163 tuner_dbg("TEA5761 set to stereo\n");
166 div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
167 buffer[1] = (div >> 8) & 0x3f;
168 buffer[2] = div & 0xff;
170 if (debug)
171 tea5761_status_dump(buffer);
173 if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7)))
174 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
176 priv->frequency = frq * 125 / 2;
178 return 0;
181 static int set_radio_freq(struct dvb_frontend *fe,
182 struct analog_parameters *params)
184 struct tea5761_priv *priv = fe->analog_demod_priv;
186 priv->standby = false;
188 return __set_radio_freq(fe, params->frequency,
189 params->audmode == V4L2_TUNER_MODE_MONO);
192 static int set_radio_sleep(struct dvb_frontend *fe)
194 struct tea5761_priv *priv = fe->analog_demod_priv;
196 priv->standby = true;
198 return __set_radio_freq(fe, priv->frequency, false);
201 static int tea5761_read_status(struct dvb_frontend *fe, char *buffer)
203 struct tea5761_priv *priv = fe->tuner_priv;
204 int rc;
206 memset(buffer, 0, 16);
207 if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) {
208 tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc);
209 return -EREMOTEIO;
212 return 0;
215 static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer)
217 struct tea5761_priv *priv = fe->tuner_priv;
219 int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
221 tuner_dbg("Signal strength: %d\n", signal);
223 return signal;
226 static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer)
228 struct tea5761_priv *priv = fe->tuner_priv;
230 int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO;
232 tuner_dbg("Radio ST GET = %02x\n", stereo);
234 return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
237 static int tea5761_get_status(struct dvb_frontend *fe, u32 *status)
239 unsigned char buffer[16];
241 *status = 0;
243 if (0 == tea5761_read_status(fe, buffer)) {
244 if (tea5761_signal(fe, buffer))
245 *status = TUNER_STATUS_LOCKED;
246 if (tea5761_stereo(fe, buffer))
247 *status |= TUNER_STATUS_STEREO;
250 return 0;
253 static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
255 unsigned char buffer[16];
257 *strength = 0;
259 if (0 == tea5761_read_status(fe, buffer))
260 *strength = tea5761_signal(fe, buffer);
262 return 0;
265 int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
267 unsigned char buffer[16];
268 int rc;
269 struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
271 if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) {
272 printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc);
273 return -EINVAL;
276 if ((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061)) {
277 printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x."
278 " It is not a TEA5761\n",
279 buffer[13], buffer[14], buffer[15]);
280 return -EINVAL;
282 printk(KERN_WARNING "tea5761: TEA%02x%02x detected. "
283 "Manufacturer ID= 0x%02x\n",
284 buffer[14], buffer[15], buffer[13]);
286 return 0;
289 static int tea5761_release(struct dvb_frontend *fe)
291 kfree(fe->tuner_priv);
292 fe->tuner_priv = NULL;
294 return 0;
297 static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
299 struct tea5761_priv *priv = fe->tuner_priv;
300 *frequency = priv->frequency;
301 return 0;
304 static struct dvb_tuner_ops tea5761_tuner_ops = {
305 .info = {
306 .name = "tea5761", // Philips TEA5761HN FM Radio
308 .set_analog_params = set_radio_freq,
309 .sleep = set_radio_sleep,
310 .release = tea5761_release,
311 .get_frequency = tea5761_get_frequency,
312 .get_status = tea5761_get_status,
313 .get_rf_strength = tea5761_get_rf_strength,
316 struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe,
317 struct i2c_adapter* i2c_adap,
318 u8 i2c_addr)
320 struct tea5761_priv *priv = NULL;
322 if (tea5761_autodetection(i2c_adap, i2c_addr) != 0)
323 return NULL;
325 priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL);
326 if (priv == NULL)
327 return NULL;
328 fe->tuner_priv = priv;
330 priv->i2c_props.addr = i2c_addr;
331 priv->i2c_props.adap = i2c_adap;
332 priv->i2c_props.name = "tea5761";
334 memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
335 sizeof(struct dvb_tuner_ops));
337 tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");
339 return fe;
343 EXPORT_SYMBOL_GPL(tea5761_attach);
344 EXPORT_SYMBOL_GPL(tea5761_autodetection);
346 MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
347 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
348 MODULE_LICENSE("GPL");