This source file includes following definitions.
- tea5761_status_dump
- __set_radio_freq
- set_radio_freq
- set_radio_sleep
- tea5761_read_status
- tea5761_signal
- tea5761_stereo
- tea5761_get_status
- tea5761_get_rf_strength
- tea5761_autodetection
- tea5761_release
- tea5761_get_frequency
- tea5761_attach
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7 #include <linux/i2c.h>
8 #include <linux/slab.h>
9 #include <linux/delay.h>
10 #include <linux/videodev2.h>
11 #include <media/tuner.h>
12 #include "tuner-i2c.h"
13 #include "tea5761.h"
14
15 static int debug;
16 module_param(debug, int, 0644);
17 MODULE_PARM_DESC(debug, "enable verbose debug messages");
18
19 struct tea5761_priv {
20 struct tuner_i2c_props i2c_props;
21
22 u32 frequency;
23 bool standby;
24 };
25
26
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33
34
35 #define TEA5761_INTREG_IFFLAG 0x10
36 #define TEA5761_INTREG_LEVFLAG 0x8
37 #define TEA5761_INTREG_FRRFLAG 0x2
38 #define TEA5761_INTREG_BLFLAG 0x1
39
40
41 #define TEA5761_INTREG_IFMSK 0x10
42 #define TEA5761_INTREG_LEVMSK 0x8
43 #define TEA5761_INTREG_FRMSK 0x2
44 #define TEA5761_INTREG_BLMSK 0x1
45
46
47
48
49 #define TEA5761_FRQSET_SEARCH_UP 0x80
50 #define TEA5761_FRQSET_SEARCH_MODE 0x40
51
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59
60
61 #define TEA5761_TNCTRL_PUPD_0 0x40
62 #define TEA5761_TNCTRL_BLIM 0X20
63 #define TEA5761_TNCTRL_SWPM 0x10
64 #define TEA5761_TNCTRL_IFCTC 0x08
65 #define TEA5761_TNCTRL_AFM 0x04
66 #define TEA5761_TNCTRL_SMUTE 0x02
67 #define TEA5761_TNCTRL_SNC 0x01
68
69
70
71 #define TEA5761_TNCTRL_MU 0x80
72 #define TEA5761_TNCTRL_SSL_1 0x40
73 #define TEA5761_TNCTRL_SSL_0 0x20
74 #define TEA5761_TNCTRL_HLSI 0x10
75 #define TEA5761_TNCTRL_MST 0x08
76 #define TEA5761_TNCTRL_SWP 0x04
77 #define TEA5761_TNCTRL_DTC 0x02
78 #define TEA5761_TNCTRL_AHLSI 0x01
79
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89
90
91 #define TEA5761_TUNCHECK_IF_MASK 0x7e
92 #define TEA5761_TUNCHECK_TUNTO 0x01
93
94
95 #define TEA5761_TUNCHECK_LEV_MASK 0xf0
96 #define TEA5761_TUNCHECK_LD 0x08
97 #define TEA5761_TUNCHECK_STEREO 0x04
98
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104
105
106 #define TEA5767_MANID_VERSION_MASK 0xf0
107 #define TEA5767_MANID_ID_MSB_MASK 0x0f
108
109
110
111 #define TEA5767_MANID_ID_LSB_MASK 0xfe
112 #define TEA5767_MANID_IDAV 0x01
113
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120
121
122 #define FREQ_OFFSET 0
123 static void tea5761_status_dump(unsigned char *buffer)
124 {
125 unsigned int div, frq;
126
127 div = ((buffer[2] & 0x3f) << 8) | buffer[3];
128
129 frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4;
130
131 printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n",
132 frq / 1000, frq % 1000, div);
133 }
134
135
136 static int __set_radio_freq(struct dvb_frontend *fe,
137 unsigned int freq,
138 bool mono)
139 {
140 struct tea5761_priv *priv = fe->tuner_priv;
141 unsigned int frq = freq;
142 unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
143 unsigned div;
144 int rc;
145
146 tuner_dbg("radio freq counter %d\n", frq);
147
148 if (priv->standby) {
149 tuner_dbg("TEA5761 set to standby mode\n");
150 buffer[5] |= TEA5761_TNCTRL_MU;
151 } else {
152 buffer[4] |= TEA5761_TNCTRL_PUPD_0;
153 }
154
155
156 if (mono) {
157 tuner_dbg("TEA5761 set to mono\n");
158 buffer[5] |= TEA5761_TNCTRL_MST;
159 } else {
160 tuner_dbg("TEA5761 set to stereo\n");
161 }
162
163 div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
164 buffer[1] = (div >> 8) & 0x3f;
165 buffer[2] = div & 0xff;
166
167 if (debug)
168 tea5761_status_dump(buffer);
169
170 if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7)))
171 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
172
173 priv->frequency = frq * 125 / 2;
174
175 return 0;
176 }
177
178 static int set_radio_freq(struct dvb_frontend *fe,
179 struct analog_parameters *params)
180 {
181 struct tea5761_priv *priv = fe->analog_demod_priv;
182
183 priv->standby = false;
184
185 return __set_radio_freq(fe, params->frequency,
186 params->audmode == V4L2_TUNER_MODE_MONO);
187 }
188
189 static int set_radio_sleep(struct dvb_frontend *fe)
190 {
191 struct tea5761_priv *priv = fe->analog_demod_priv;
192
193 priv->standby = true;
194
195 return __set_radio_freq(fe, priv->frequency, false);
196 }
197
198 static int tea5761_read_status(struct dvb_frontend *fe, char *buffer)
199 {
200 struct tea5761_priv *priv = fe->tuner_priv;
201 int rc;
202
203 memset(buffer, 0, 16);
204 if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) {
205 tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc);
206 return -EREMOTEIO;
207 }
208
209 return 0;
210 }
211
212 static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer)
213 {
214 struct tea5761_priv *priv = fe->tuner_priv;
215
216 int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
217
218 tuner_dbg("Signal strength: %d\n", signal);
219
220 return signal;
221 }
222
223 static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer)
224 {
225 struct tea5761_priv *priv = fe->tuner_priv;
226
227 int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO;
228
229 tuner_dbg("Radio ST GET = %02x\n", stereo);
230
231 return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
232 }
233
234 static int tea5761_get_status(struct dvb_frontend *fe, u32 *status)
235 {
236 unsigned char buffer[16];
237
238 *status = 0;
239
240 if (0 == tea5761_read_status(fe, buffer)) {
241 if (tea5761_signal(fe, buffer))
242 *status = TUNER_STATUS_LOCKED;
243 if (tea5761_stereo(fe, buffer))
244 *status |= TUNER_STATUS_STEREO;
245 }
246
247 return 0;
248 }
249
250 static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
251 {
252 unsigned char buffer[16];
253
254 *strength = 0;
255
256 if (0 == tea5761_read_status(fe, buffer))
257 *strength = tea5761_signal(fe, buffer);
258
259 return 0;
260 }
261
262 int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
263 {
264 unsigned char buffer[16];
265 int rc;
266 struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
267
268 if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) {
269 printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc);
270 return -EINVAL;
271 }
272
273 if ((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061)) {
274 printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x. It is not a TEA5761\n",
275 buffer[13], buffer[14], buffer[15]);
276 return -EINVAL;
277 }
278 printk(KERN_WARNING "tea5761: TEA%02x%02x detected. Manufacturer ID= 0x%02x\n",
279 buffer[14], buffer[15], buffer[13]);
280
281 return 0;
282 }
283
284 static void tea5761_release(struct dvb_frontend *fe)
285 {
286 kfree(fe->tuner_priv);
287 fe->tuner_priv = NULL;
288 }
289
290 static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
291 {
292 struct tea5761_priv *priv = fe->tuner_priv;
293 *frequency = priv->frequency;
294 return 0;
295 }
296
297 static const struct dvb_tuner_ops tea5761_tuner_ops = {
298 .info = {
299 .name = "tea5761",
300 },
301 .set_analog_params = set_radio_freq,
302 .sleep = set_radio_sleep,
303 .release = tea5761_release,
304 .get_frequency = tea5761_get_frequency,
305 .get_status = tea5761_get_status,
306 .get_rf_strength = tea5761_get_rf_strength,
307 };
308
309 struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe,
310 struct i2c_adapter* i2c_adap,
311 u8 i2c_addr)
312 {
313 struct tea5761_priv *priv = NULL;
314
315 if (tea5761_autodetection(i2c_adap, i2c_addr) != 0)
316 return NULL;
317
318 priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL);
319 if (priv == NULL)
320 return NULL;
321 fe->tuner_priv = priv;
322
323 priv->i2c_props.addr = i2c_addr;
324 priv->i2c_props.adap = i2c_adap;
325 priv->i2c_props.name = "tea5761";
326
327 memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
328 sizeof(struct dvb_tuner_ops));
329
330 tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");
331
332 return fe;
333 }
334
335
336 EXPORT_SYMBOL_GPL(tea5761_attach);
337 EXPORT_SYMBOL_GPL(tea5761_autodetection);
338
339 MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
340 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
341 MODULE_LICENSE("GPL v2");