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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 | }; | |
27 | ||
28 | /*****************************************************************************/ | |
29 | ||
30 | /*************************** | |
31 | * TEA5761HN I2C registers * | |
32 | ***************************/ | |
33 | ||
34 | /* INTREG - Read: bytes 0 and 1 / Write: byte 0 */ | |
35 | ||
36 | /* first byte for reading */ | |
37 | #define TEA5761_INTREG_IFFLAG 0x10 | |
38 | #define TEA5761_INTREG_LEVFLAG 0x8 | |
39 | #define TEA5761_INTREG_FRRFLAG 0x2 | |
40 | #define TEA5761_INTREG_BLFLAG 0x1 | |
41 | ||
42 | /* second byte for reading / byte for writing */ | |
43 | #define TEA5761_INTREG_IFMSK 0x10 | |
44 | #define TEA5761_INTREG_LEVMSK 0x8 | |
45 | #define TEA5761_INTREG_FRMSK 0x2 | |
46 | #define TEA5761_INTREG_BLMSK 0x1 | |
47 | ||
48 | /* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */ | |
49 | ||
50 | /* First byte */ | |
51 | #define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */ | |
52 | #define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */ | |
53 | ||
54 | /* Bits 0-5 for divider MSB */ | |
55 | ||
56 | /* Second byte */ | |
57 | /* Bits 0-7 for divider LSB */ | |
58 | ||
59 | /* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */ | |
60 | ||
61 | /* first byte */ | |
62 | ||
63 | #define TEA5761_TNCTRL_PUPD_0 0x40 /* Power UP/Power Down MSB */ | |
64 | #define TEA5761_TNCTRL_BLIM 0X20 /* 1= Japan Frequencies, 0= European frequencies */ | |
65 | #define TEA5761_TNCTRL_SWPM 0x10 /* 1= software port is FRRFLAG */ | |
66 | #define TEA5761_TNCTRL_IFCTC 0x08 /* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */ | |
67 | #define TEA5761_TNCTRL_AFM 0x04 | |
68 | #define TEA5761_TNCTRL_SMUTE 0x02 /* 1= Soft mute */ | |
69 | #define TEA5761_TNCTRL_SNC 0x01 | |
70 | ||
71 | /* second byte */ | |
72 | ||
73 | #define TEA5761_TNCTRL_MU 0x80 /* 1=Hard mute */ | |
74 | #define TEA5761_TNCTRL_SSL_1 0x40 | |
75 | #define TEA5761_TNCTRL_SSL_0 0x20 | |
76 | #define TEA5761_TNCTRL_HLSI 0x10 | |
77 | #define TEA5761_TNCTRL_MST 0x08 /* 1 = mono */ | |
78 | #define TEA5761_TNCTRL_SWP 0x04 | |
79 | #define TEA5761_TNCTRL_DTC 0x02 /* 1 = deemphasis 50 us, 0 = deemphasis 75 us */ | |
80 | #define TEA5761_TNCTRL_AHLSI 0x01 | |
81 | ||
82 | /* FRQCHECK - Read: bytes 6 and 7 */ | |
83 | /* First byte */ | |
84 | ||
85 | /* Bits 0-5 for divider MSB */ | |
86 | ||
87 | /* Second byte */ | |
88 | /* Bits 0-7 for divider LSB */ | |
89 | ||
90 | /* TUNCHECK - Read: bytes 8 and 9 */ | |
91 | ||
92 | /* First byte */ | |
93 | #define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */ | |
94 | #define TEA5761_TUNCHECK_TUNTO 0x01 | |
95 | ||
96 | /* Second byte */ | |
97 | #define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */ | |
98 | #define TEA5761_TUNCHECK_LD 0x08 | |
99 | #define TEA5761_TUNCHECK_STEREO 0x04 | |
100 | ||
101 | /* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */ | |
102 | ||
103 | /* All zero = no test mode */ | |
104 | ||
105 | /* MANID - Read: bytes 12 and 13 */ | |
106 | ||
107 | /* First byte - should be 0x10 */ | |
108 | #define TEA5767_MANID_VERSION_MASK 0xf0 /* Version = 1 */ | |
109 | #define TEA5767_MANID_ID_MSB_MASK 0x0f /* Manufacurer ID - should be 0 */ | |
110 | ||
111 | /* Second byte - Should be 0x2b */ | |
112 | ||
113 | #define TEA5767_MANID_ID_LSB_MASK 0xfe /* Manufacturer ID - should be 0x15 */ | |
114 | #define TEA5767_MANID_IDAV 0x01 /* 1 = Chip has ID, 0 = Chip has no ID */ | |
115 | ||
116 | /* Chip ID - Read: bytes 14 and 15 */ | |
117 | ||
118 | /* First byte - should be 0x57 */ | |
119 | ||
120 | /* Second byte - should be 0x61 */ | |
121 | ||
122 | /*****************************************************************************/ | |
123 | ||
124 | #define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */ | |
125 | static void tea5761_status_dump(unsigned char *buffer) | |
126 | { | |
127 | unsigned int div, frq; | |
128 | ||
129 | div = ((buffer[2] & 0x3f) << 8) | buffer[3]; | |
130 | ||
131 | frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */ | |
132 | ||
133 | printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n", | |
134 | frq / 1000, frq % 1000, div); | |
135 | } | |
136 | ||
137 | /* Freq should be specifyed at 62.5 Hz */ | |
138 | static int set_radio_freq(struct dvb_frontend *fe, | |
139 | struct analog_parameters *params) | |
140 | { | |
141 | struct tea5761_priv *priv = fe->tuner_priv; | |
142 | unsigned int frq = params->frequency; | |
143 | unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 }; | |
144 | unsigned div; | |
145 | int rc; | |
146 | ||
147 | tuner_dbg("radio freq counter %d\n", frq); | |
148 | ||
149 | if (params->mode == T_STANDBY) { | |
150 | tuner_dbg("TEA5761 set to standby mode\n"); | |
151 | buffer[5] |= TEA5761_TNCTRL_MU; | |
152 | } else { | |
153 | buffer[4] |= TEA5761_TNCTRL_PUPD_0; | |
154 | } | |
155 | ||
156 | ||
157 | if (params->audmode == V4L2_TUNER_MODE_MONO) { | |
158 | tuner_dbg("TEA5761 set to mono\n"); | |
159 | buffer[5] |= TEA5761_TNCTRL_MST; | |
160 | } else { | |
161 | tuner_dbg("TEA5761 set to stereo\n"); | |
162 | } | |
163 | ||
164 | div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15; | |
165 | buffer[1] = (div >> 8) & 0x3f; | |
166 | buffer[2] = div & 0xff; | |
167 | ||
168 | if (debug) | |
169 | tea5761_status_dump(buffer); | |
170 | ||
171 | if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7))) | |
172 | tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); | |
173 | ||
174 | priv->frequency = frq * 125 / 2; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static int tea5761_read_status(struct dvb_frontend *fe, char *buffer) | |
180 | { | |
181 | struct tea5761_priv *priv = fe->tuner_priv; | |
182 | int rc; | |
183 | ||
184 | memset(buffer, 0, 16); | |
185 | if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) { | |
186 | tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc); | |
187 | return -EREMOTEIO; | |
188 | } | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer) | |
194 | { | |
195 | struct tea5761_priv *priv = fe->tuner_priv; | |
196 | ||
197 | int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4)); | |
198 | ||
199 | tuner_dbg("Signal strength: %d\n", signal); | |
200 | ||
201 | return signal; | |
202 | } | |
203 | ||
204 | static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer) | |
205 | { | |
206 | struct tea5761_priv *priv = fe->tuner_priv; | |
207 | ||
208 | int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO; | |
209 | ||
210 | tuner_dbg("Radio ST GET = %02x\n", stereo); | |
211 | ||
212 | return (stereo ? V4L2_TUNER_SUB_STEREO : 0); | |
213 | } | |
214 | ||
215 | static int tea5761_get_status(struct dvb_frontend *fe, u32 *status) | |
216 | { | |
217 | unsigned char buffer[16]; | |
218 | ||
219 | *status = 0; | |
220 | ||
221 | if (0 == tea5761_read_status(fe, buffer)) { | |
222 | if (tea5761_signal(fe, buffer)) | |
223 | *status = TUNER_STATUS_LOCKED; | |
224 | if (tea5761_stereo(fe, buffer)) | |
225 | *status |= TUNER_STATUS_STEREO; | |
226 | } | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength) | |
232 | { | |
233 | unsigned char buffer[16]; | |
234 | ||
235 | *strength = 0; | |
236 | ||
237 | if (0 == tea5761_read_status(fe, buffer)) | |
238 | *strength = tea5761_signal(fe, buffer); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr) | |
244 | { | |
245 | unsigned char buffer[16]; | |
246 | int rc; | |
247 | struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr }; | |
248 | ||
249 | if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) { | |
250 | printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc); | |
251 | return -EINVAL; | |
252 | } | |
253 | ||
254 | if ((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061)) { | |
255 | printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x." | |
256 | " It is not a TEA5761\n", | |
257 | buffer[13], buffer[14], buffer[15]); | |
258 | return -EINVAL; | |
259 | } | |
260 | printk(KERN_WARNING "tea5761: TEA%02x%02x detected. " | |
261 | "Manufacturer ID= 0x%02x\n", | |
262 | buffer[14], buffer[15], buffer[13]); | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | static int tea5761_release(struct dvb_frontend *fe) | |
268 | { | |
269 | kfree(fe->tuner_priv); | |
270 | fe->tuner_priv = NULL; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
276 | { | |
277 | struct tea5761_priv *priv = fe->tuner_priv; | |
278 | *frequency = priv->frequency; | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static struct dvb_tuner_ops tea5761_tuner_ops = { | |
283 | .info = { | |
284 | .name = "tea5761", // Philips TEA5761HN FM Radio | |
285 | }, | |
286 | .set_analog_params = set_radio_freq, | |
287 | .release = tea5761_release, | |
288 | .get_frequency = tea5761_get_frequency, | |
289 | .get_status = tea5761_get_status, | |
290 | .get_rf_strength = tea5761_get_rf_strength, | |
291 | }; | |
292 | ||
293 | struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe, | |
294 | struct i2c_adapter* i2c_adap, | |
295 | u8 i2c_addr) | |
296 | { | |
297 | struct tea5761_priv *priv = NULL; | |
298 | ||
299 | if (tea5761_autodetection(i2c_adap, i2c_addr) != 0) | |
300 | return NULL; | |
301 | ||
302 | priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL); | |
303 | if (priv == NULL) | |
304 | return NULL; | |
305 | fe->tuner_priv = priv; | |
306 | ||
307 | priv->i2c_props.addr = i2c_addr; | |
308 | priv->i2c_props.adap = i2c_adap; | |
309 | priv->i2c_props.name = "tea5761"; | |
310 | ||
311 | memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops, | |
312 | sizeof(struct dvb_tuner_ops)); | |
313 | ||
314 | tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio"); | |
315 | ||
316 | return fe; | |
317 | } | |
318 | ||
319 | ||
320 | EXPORT_SYMBOL_GPL(tea5761_attach); | |
321 | EXPORT_SYMBOL_GPL(tea5761_autodetection); | |
322 | ||
323 | MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver"); | |
324 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); | |
325 | MODULE_LICENSE("GPL"); |