diff options
Diffstat (limited to 'drivers/media/common/tuners/tea5761.c')
-rw-r--r-- | drivers/media/common/tuners/tea5761.c | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/tea5761.c b/drivers/media/common/tuners/tea5761.c new file mode 100644 index 00000000000..bf78cb9fc52 --- /dev/null +++ b/drivers/media/common/tuners/tea5761.c | |||
@@ -0,0 +1,348 @@ | |||
1 | /* | ||
2 | * For Philips TEA5761 FM Chip | ||
3 | * I2C address is allways 0x20 (0x10 at 7-bit mode). | ||
4 | * | ||
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 | ||
7 | * | ||
8 | */ | ||
9 | |||
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" | ||
17 | |||
18 | static int debug; | ||
19 | module_param(debug, int, 0644); | ||
20 | MODULE_PARM_DESC(debug, "enable verbose debug messages"); | ||
21 | |||
22 | struct tea5761_priv { | ||
23 | struct tuner_i2c_props i2c_props; | ||
24 | |||
25 | u32 frequency; | ||
26 | bool standby; | ||
27 | }; | ||
28 | |||
29 | /*****************************************************************************/ | ||
30 | |||
31 | /*************************** | ||
32 | * TEA5761HN I2C registers * | ||
33 | ***************************/ | ||
34 | |||
35 | /* INTREG - Read: bytes 0 and 1 / Write: byte 0 */ | ||
36 | |||
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 | ||
42 | |||
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 | ||
48 | |||
49 | /* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */ | ||
50 | |||
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 */ | ||
54 | |||
55 | /* Bits 0-5 for divider MSB */ | ||
56 | |||
57 | /* Second byte */ | ||
58 | /* Bits 0-7 for divider LSB */ | ||
59 | |||
60 | /* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */ | ||
61 | |||
62 | /* first byte */ | ||
63 | |||
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 | ||
71 | |||
72 | /* second byte */ | ||
73 | |||
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 | ||
82 | |||
83 | /* FRQCHECK - Read: bytes 6 and 7 */ | ||
84 | /* First byte */ | ||
85 | |||
86 | /* Bits 0-5 for divider MSB */ | ||
87 | |||
88 | /* Second byte */ | ||
89 | /* Bits 0-7 for divider LSB */ | ||
90 | |||
91 | /* TUNCHECK - Read: bytes 8 and 9 */ | ||
92 | |||
93 | /* First byte */ | ||
94 | #define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */ | ||
95 | #define TEA5761_TUNCHECK_TUNTO 0x01 | ||
96 | |||
97 | /* Second byte */ | ||
98 | #define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */ | ||
99 | #define TEA5761_TUNCHECK_LD 0x08 | ||
100 | #define TEA5761_TUNCHECK_STEREO 0x04 | ||
101 | |||
102 | /* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */ | ||
103 | |||
104 | /* All zero = no test mode */ | ||
105 | |||
106 | /* MANID - Read: bytes 12 and 13 */ | ||
107 | |||
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 */ | ||
111 | |||
112 | /* Second byte - Should be 0x2b */ | ||
113 | |||
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 */ | ||
116 | |||
117 | /* Chip ID - Read: bytes 14 and 15 */ | ||
118 | |||
119 | /* First byte - should be 0x57 */ | ||
120 | |||
121 | /* Second byte - should be 0x61 */ | ||
122 | |||
123 | /*****************************************************************************/ | ||
124 | |||
125 | #define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */ | ||
126 | static void tea5761_status_dump(unsigned char *buffer) | ||
127 | { | ||
128 | unsigned int div, frq; | ||
129 | |||
130 | div = ((buffer[2] & 0x3f) << 8) | buffer[3]; | ||
131 | |||
132 | frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */ | ||
133 | |||
134 | printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n", | ||
135 | frq / 1000, frq % 1000, div); | ||
136 | } | ||
137 | |||
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) | ||
142 | { | ||
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; | ||
148 | |||
149 | tuner_dbg("radio freq counter %d\n", frq); | ||
150 | |||
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; | ||
156 | } | ||
157 | |||
158 | |||
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"); | ||
164 | } | ||
165 | |||
166 | div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15; | ||
167 | buffer[1] = (div >> 8) & 0x3f; | ||
168 | buffer[2] = div & 0xff; | ||
169 | |||
170 | if (debug) | ||
171 | tea5761_status_dump(buffer); | ||
172 | |||
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); | ||
175 | |||
176 | priv->frequency = frq * 125 / 2; | ||
177 | |||
178 | return 0; | ||
179 | } | ||
180 | |||
181 | static int set_radio_freq(struct dvb_frontend *fe, | ||
182 | struct analog_parameters *params) | ||
183 | { | ||
184 | struct tea5761_priv *priv = fe->analog_demod_priv; | ||
185 | |||
186 | priv->standby = false; | ||
187 | |||
188 | return __set_radio_freq(fe, params->frequency, | ||
189 | params->audmode == V4L2_TUNER_MODE_MONO); | ||
190 | } | ||
191 | |||
192 | static int set_radio_sleep(struct dvb_frontend *fe) | ||
193 | { | ||
194 | struct tea5761_priv *priv = fe->analog_demod_priv; | ||
195 | |||
196 | priv->standby = true; | ||
197 | |||
198 | return __set_radio_freq(fe, priv->frequency, false); | ||
199 | } | ||
200 | |||
201 | static int tea5761_read_status(struct dvb_frontend *fe, char *buffer) | ||
202 | { | ||
203 | struct tea5761_priv *priv = fe->tuner_priv; | ||
204 | int rc; | ||
205 | |||
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; | ||
210 | } | ||
211 | |||
212 | return 0; | ||
213 | } | ||
214 | |||
215 | static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer) | ||
216 | { | ||
217 | struct tea5761_priv *priv = fe->tuner_priv; | ||
218 | |||
219 | int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4)); | ||
220 | |||
221 | tuner_dbg("Signal strength: %d\n", signal); | ||
222 | |||
223 | return signal; | ||
224 | } | ||
225 | |||
226 | static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer) | ||
227 | { | ||
228 | struct tea5761_priv *priv = fe->tuner_priv; | ||
229 | |||
230 | int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO; | ||
231 | |||
232 | tuner_dbg("Radio ST GET = %02x\n", stereo); | ||
233 | |||
234 | return (stereo ? V4L2_TUNER_SUB_STEREO : 0); | ||
235 | } | ||
236 | |||
237 | static int tea5761_get_status(struct dvb_frontend *fe, u32 *status) | ||
238 | { | ||
239 | unsigned char buffer[16]; | ||
240 | |||
241 | *status = 0; | ||
242 | |||
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; | ||
248 | } | ||
249 | |||
250 | return 0; | ||
251 | } | ||
252 | |||
253 | static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength) | ||
254 | { | ||
255 | unsigned char buffer[16]; | ||
256 | |||
257 | *strength = 0; | ||
258 | |||
259 | if (0 == tea5761_read_status(fe, buffer)) | ||
260 | *strength = tea5761_signal(fe, buffer); | ||
261 | |||
262 | return 0; | ||
263 | } | ||
264 | |||
265 | int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr) | ||
266 | { | ||
267 | unsigned char buffer[16]; | ||
268 | int rc; | ||
269 | struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr }; | ||
270 | |||
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; | ||
274 | } | ||
275 | |||
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; | ||
281 | } | ||
282 | printk(KERN_WARNING "tea5761: TEA%02x%02x detected. " | ||
283 | "Manufacturer ID= 0x%02x\n", | ||
284 | buffer[14], buffer[15], buffer[13]); | ||
285 | |||
286 | return 0; | ||
287 | } | ||
288 | |||
289 | static int tea5761_release(struct dvb_frontend *fe) | ||
290 | { | ||
291 | kfree(fe->tuner_priv); | ||
292 | fe->tuner_priv = NULL; | ||
293 | |||
294 | return 0; | ||
295 | } | ||
296 | |||
297 | static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency) | ||
298 | { | ||
299 | struct tea5761_priv *priv = fe->tuner_priv; | ||
300 | *frequency = priv->frequency; | ||
301 | return 0; | ||
302 | } | ||
303 | |||
304 | static struct dvb_tuner_ops tea5761_tuner_ops = { | ||
305 | .info = { | ||
306 | .name = "tea5761", // Philips TEA5761HN FM Radio | ||
307 | }, | ||
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, | ||
314 | }; | ||
315 | |||
316 | struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe, | ||
317 | struct i2c_adapter* i2c_adap, | ||
318 | u8 i2c_addr) | ||
319 | { | ||
320 | struct tea5761_priv *priv = NULL; | ||
321 | |||
322 | if (tea5761_autodetection(i2c_adap, i2c_addr) != 0) | ||
323 | return NULL; | ||
324 | |||
325 | priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL); | ||
326 | if (priv == NULL) | ||
327 | return NULL; | ||
328 | fe->tuner_priv = priv; | ||
329 | |||
330 | priv->i2c_props.addr = i2c_addr; | ||
331 | priv->i2c_props.adap = i2c_adap; | ||
332 | priv->i2c_props.name = "tea5761"; | ||
333 | |||
334 | memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops, | ||
335 | sizeof(struct dvb_tuner_ops)); | ||
336 | |||
337 | tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio"); | ||
338 | |||
339 | return fe; | ||
340 | } | ||
341 | |||
342 | |||
343 | EXPORT_SYMBOL_GPL(tea5761_attach); | ||
344 | EXPORT_SYMBOL_GPL(tea5761_autodetection); | ||
345 | |||
346 | MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver"); | ||
347 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); | ||
348 | MODULE_LICENSE("GPL"); | ||