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46a60cfe FB |
1 | /* |
2 | * driver/media/radio/radio-tea5764.c | |
3 | * | |
4 | * Driver for TEA5764 radio chip for linux 2.6. | |
5 | * This driver is for TEA5764 chip from NXP, used in EZX phones from Motorola. | |
6 | * The I2C protocol is used for communicate with chip. | |
7 | * | |
8 | * Based in radio-tea5761.c Copyright (C) 2005 Nokia Corporation | |
9 | * | |
10 | * Copyright (c) 2008 Fabio Belavenuto <belavenuto@gmail.com> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * History: | |
27 | * 2008-12-06 Fabio Belavenuto <belavenuto@gmail.com> | |
28 | * initial code | |
29 | * | |
30 | * TODO: | |
31 | * add platform_data support for IRQs platform dependencies | |
32 | * add RDS support | |
33 | */ | |
34 | #include <linux/kernel.h> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
46a60cfe FB |
36 | #include <linux/module.h> |
37 | #include <linux/init.h> /* Initdata */ | |
38 | #include <linux/videodev2.h> /* kernel radio structs */ | |
39 | #include <linux/i2c.h> /* I2C */ | |
40 | #include <media/v4l2-common.h> | |
41 | #include <media/v4l2-ioctl.h> | |
46a60cfe | 42 | |
29834c1a | 43 | #define DRIVER_VERSION "0.0.2" |
46a60cfe FB |
44 | |
45 | #define DRIVER_AUTHOR "Fabio Belavenuto <belavenuto@gmail.com>" | |
46 | #define DRIVER_DESC "A driver for the TEA5764 radio chip for EZX Phones." | |
47 | ||
48 | #define PINFO(format, ...)\ | |
49 | printk(KERN_INFO KBUILD_MODNAME ": "\ | |
50 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) | |
51 | #define PWARN(format, ...)\ | |
52 | printk(KERN_WARNING KBUILD_MODNAME ": "\ | |
53 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) | |
54 | # define PDEBUG(format, ...)\ | |
55 | printk(KERN_DEBUG KBUILD_MODNAME ": "\ | |
56 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) | |
57 | ||
58 | /* Frequency limits in MHz -- these are European values. For Japanese | |
59 | devices, that would be 76000 and 91000. */ | |
60 | #define FREQ_MIN 87500 | |
61 | #define FREQ_MAX 108000 | |
62 | #define FREQ_MUL 16 | |
63 | ||
64 | /* TEA5764 registers */ | |
65 | #define TEA5764_MANID 0x002b | |
66 | #define TEA5764_CHIPID 0x5764 | |
67 | ||
68 | #define TEA5764_INTREG_BLMSK 0x0001 | |
69 | #define TEA5764_INTREG_FRRMSK 0x0002 | |
70 | #define TEA5764_INTREG_LEVMSK 0x0008 | |
71 | #define TEA5764_INTREG_IFMSK 0x0010 | |
72 | #define TEA5764_INTREG_BLMFLAG 0x0100 | |
73 | #define TEA5764_INTREG_FRRFLAG 0x0200 | |
74 | #define TEA5764_INTREG_LEVFLAG 0x0800 | |
75 | #define TEA5764_INTREG_IFFLAG 0x1000 | |
76 | ||
77 | #define TEA5764_FRQSET_SUD 0x8000 | |
78 | #define TEA5764_FRQSET_SM 0x4000 | |
79 | ||
80 | #define TEA5764_TNCTRL_PUPD1 0x8000 | |
81 | #define TEA5764_TNCTRL_PUPD0 0x4000 | |
82 | #define TEA5764_TNCTRL_BLIM 0x2000 | |
83 | #define TEA5764_TNCTRL_SWPM 0x1000 | |
84 | #define TEA5764_TNCTRL_IFCTC 0x0800 | |
85 | #define TEA5764_TNCTRL_AFM 0x0400 | |
86 | #define TEA5764_TNCTRL_SMUTE 0x0200 | |
87 | #define TEA5764_TNCTRL_SNC 0x0100 | |
88 | #define TEA5764_TNCTRL_MU 0x0080 | |
89 | #define TEA5764_TNCTRL_SSL1 0x0040 | |
90 | #define TEA5764_TNCTRL_SSL0 0x0020 | |
91 | #define TEA5764_TNCTRL_HLSI 0x0010 | |
92 | #define TEA5764_TNCTRL_MST 0x0008 | |
93 | #define TEA5764_TNCTRL_SWP 0x0004 | |
94 | #define TEA5764_TNCTRL_DTC 0x0002 | |
95 | #define TEA5764_TNCTRL_AHLSI 0x0001 | |
96 | ||
97 | #define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4) | |
98 | #define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9) | |
99 | #define TEA5764_TUNCHK_TUNTO 0x0100 | |
100 | #define TEA5764_TUNCHK_LD 0x0008 | |
101 | #define TEA5764_TUNCHK_STEREO 0x0004 | |
102 | ||
103 | #define TEA5764_TESTREG_TRIGFR 0x0800 | |
104 | ||
105 | struct tea5764_regs { | |
106 | u16 intreg; /* INTFLAG & INTMSK */ | |
107 | u16 frqset; /* FRQSETMSB & FRQSETLSB */ | |
108 | u16 tnctrl; /* TNCTRL1 & TNCTRL2 */ | |
109 | u16 frqchk; /* FRQCHKMSB & FRQCHKLSB */ | |
110 | u16 tunchk; /* IFCHK & LEVCHK */ | |
111 | u16 testreg; /* TESTBITS & TESTMODE */ | |
112 | u16 rdsstat; /* RDSSTAT1 & RDSSTAT2 */ | |
113 | u16 rdslb; /* RDSLBMSB & RDSLBLSB */ | |
114 | u16 rdspb; /* RDSPBMSB & RDSPBLSB */ | |
115 | u16 rdsbc; /* RDSBBC & RDSGBC */ | |
116 | u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */ | |
117 | u16 rdsbbl; /* PAUSEDET & RDSBBL */ | |
118 | u16 manid; /* MANID1 & MANID2 */ | |
119 | u16 chipid; /* CHIPID1 & CHIPID2 */ | |
120 | } __attribute__ ((packed)); | |
121 | ||
122 | struct tea5764_write_regs { | |
123 | u8 intreg; /* INTMSK */ | |
124 | u16 frqset; /* FRQSETMSB & FRQSETLSB */ | |
125 | u16 tnctrl; /* TNCTRL1 & TNCTRL2 */ | |
126 | u16 testreg; /* TESTBITS & TESTMODE */ | |
127 | u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */ | |
128 | u16 rdsbbl; /* PAUSEDET & RDSBBL */ | |
129 | } __attribute__ ((packed)); | |
130 | ||
8c4343e5 | 131 | #ifdef CONFIG_RADIO_TEA5764_XTAL |
46a60cfe | 132 | #define RADIO_TEA5764_XTAL 1 |
8c4343e5 PB |
133 | #else |
134 | #define RADIO_TEA5764_XTAL 0 | |
46a60cfe FB |
135 | #endif |
136 | ||
137 | static int radio_nr = -1; | |
138 | static int use_xtal = RADIO_TEA5764_XTAL; | |
139 | ||
140 | struct tea5764_device { | |
141 | struct i2c_client *i2c_client; | |
142 | struct video_device *videodev; | |
143 | struct tea5764_regs regs; | |
144 | struct mutex mutex; | |
46a60cfe FB |
145 | }; |
146 | ||
147 | /* I2C code related */ | |
0dec8688 | 148 | static int tea5764_i2c_read(struct tea5764_device *radio) |
46a60cfe FB |
149 | { |
150 | int i; | |
151 | u16 *p = (u16 *) &radio->regs; | |
152 | ||
153 | struct i2c_msg msgs[1] = { | |
66ba9590 S |
154 | { .addr = radio->i2c_client->addr, |
155 | .flags = I2C_M_RD, | |
156 | .len = sizeof(radio->regs), | |
157 | .buf = (void *)&radio->regs | |
158 | }, | |
46a60cfe FB |
159 | }; |
160 | if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) | |
161 | return -EIO; | |
162 | for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++) | |
163 | p[i] = __be16_to_cpu(p[i]); | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
0dec8688 | 168 | static int tea5764_i2c_write(struct tea5764_device *radio) |
46a60cfe FB |
169 | { |
170 | struct tea5764_write_regs wr; | |
171 | struct tea5764_regs *r = &radio->regs; | |
172 | struct i2c_msg msgs[1] = { | |
66ba9590 S |
173 | { |
174 | .addr = radio->i2c_client->addr, | |
175 | .len = sizeof(wr), | |
176 | .buf = (void *)&wr | |
177 | }, | |
46a60cfe FB |
178 | }; |
179 | wr.intreg = r->intreg & 0xff; | |
180 | wr.frqset = __cpu_to_be16(r->frqset); | |
181 | wr.tnctrl = __cpu_to_be16(r->tnctrl); | |
182 | wr.testreg = __cpu_to_be16(r->testreg); | |
183 | wr.rdsctrl = __cpu_to_be16(r->rdsctrl); | |
184 | wr.rdsbbl = __cpu_to_be16(r->rdsbbl); | |
185 | if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) | |
186 | return -EIO; | |
187 | return 0; | |
188 | } | |
189 | ||
190 | /* V4L2 code related */ | |
191 | static struct v4l2_queryctrl radio_qctrl[] = { | |
192 | { | |
193 | .id = V4L2_CID_AUDIO_MUTE, | |
194 | .name = "Mute", | |
195 | .minimum = 0, | |
196 | .maximum = 1, | |
197 | .default_value = 1, | |
198 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
199 | } | |
200 | }; | |
201 | ||
202 | static void tea5764_power_up(struct tea5764_device *radio) | |
203 | { | |
204 | struct tea5764_regs *r = &radio->regs; | |
205 | ||
206 | if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) { | |
207 | r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU | | |
208 | TEA5764_TNCTRL_HLSI); | |
209 | if (!use_xtal) | |
210 | r->testreg |= TEA5764_TESTREG_TRIGFR; | |
211 | else | |
212 | r->testreg &= ~TEA5764_TESTREG_TRIGFR; | |
213 | ||
214 | r->tnctrl |= TEA5764_TNCTRL_PUPD0; | |
215 | tea5764_i2c_write(radio); | |
216 | } | |
217 | } | |
218 | ||
219 | static void tea5764_power_down(struct tea5764_device *radio) | |
220 | { | |
221 | struct tea5764_regs *r = &radio->regs; | |
222 | ||
223 | if (r->tnctrl & TEA5764_TNCTRL_PUPD0) { | |
224 | r->tnctrl &= ~TEA5764_TNCTRL_PUPD0; | |
225 | tea5764_i2c_write(radio); | |
226 | } | |
227 | } | |
228 | ||
229 | static void tea5764_set_freq(struct tea5764_device *radio, int freq) | |
230 | { | |
231 | struct tea5764_regs *r = &radio->regs; | |
232 | ||
233 | /* formula: (freq [+ or -] 225000) / 8192 */ | |
234 | if (r->tnctrl & TEA5764_TNCTRL_HLSI) | |
235 | r->frqset = (freq + 225000) / 8192; | |
236 | else | |
237 | r->frqset = (freq - 225000) / 8192; | |
238 | } | |
239 | ||
240 | static int tea5764_get_freq(struct tea5764_device *radio) | |
241 | { | |
242 | struct tea5764_regs *r = &radio->regs; | |
243 | ||
244 | if (r->tnctrl & TEA5764_TNCTRL_HLSI) | |
245 | return (r->frqchk * 8192) - 225000; | |
246 | else | |
247 | return (r->frqchk * 8192) + 225000; | |
248 | } | |
249 | ||
250 | /* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ | |
251 | static void tea5764_tune(struct tea5764_device *radio, int freq) | |
252 | { | |
253 | tea5764_set_freq(radio, freq); | |
254 | if (tea5764_i2c_write(radio)) | |
255 | PWARN("Could not set frequency!"); | |
256 | } | |
257 | ||
258 | static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode) | |
259 | { | |
260 | struct tea5764_regs *r = &radio->regs; | |
261 | int tnctrl = r->tnctrl; | |
262 | ||
263 | if (audmode == V4L2_TUNER_MODE_MONO) | |
264 | r->tnctrl |= TEA5764_TNCTRL_MST; | |
265 | else | |
266 | r->tnctrl &= ~TEA5764_TNCTRL_MST; | |
267 | if (tnctrl != r->tnctrl) | |
268 | tea5764_i2c_write(radio); | |
269 | } | |
270 | ||
271 | static int tea5764_get_audout_mode(struct tea5764_device *radio) | |
272 | { | |
273 | struct tea5764_regs *r = &radio->regs; | |
274 | ||
275 | if (r->tnctrl & TEA5764_TNCTRL_MST) | |
276 | return V4L2_TUNER_MODE_MONO; | |
277 | else | |
278 | return V4L2_TUNER_MODE_STEREO; | |
279 | } | |
280 | ||
281 | static void tea5764_mute(struct tea5764_device *radio, int on) | |
282 | { | |
283 | struct tea5764_regs *r = &radio->regs; | |
284 | int tnctrl = r->tnctrl; | |
285 | ||
286 | if (on) | |
287 | r->tnctrl |= TEA5764_TNCTRL_MU; | |
288 | else | |
289 | r->tnctrl &= ~TEA5764_TNCTRL_MU; | |
290 | if (tnctrl != r->tnctrl) | |
291 | tea5764_i2c_write(radio); | |
292 | } | |
293 | ||
294 | static int tea5764_is_muted(struct tea5764_device *radio) | |
295 | { | |
296 | return radio->regs.tnctrl & TEA5764_TNCTRL_MU; | |
297 | } | |
298 | ||
299 | /* V4L2 vidioc */ | |
300 | static int vidioc_querycap(struct file *file, void *priv, | |
301 | struct v4l2_capability *v) | |
302 | { | |
303 | struct tea5764_device *radio = video_drvdata(file); | |
304 | struct video_device *dev = radio->videodev; | |
305 | ||
306 | strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver)); | |
307 | strlcpy(v->card, dev->name, sizeof(v->card)); | |
c3ef01ce KS |
308 | snprintf(v->bus_info, sizeof(v->bus_info), |
309 | "I2C:%s", dev_name(&dev->dev)); | |
46a60cfe FB |
310 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
311 | return 0; | |
312 | } | |
313 | ||
314 | static int vidioc_g_tuner(struct file *file, void *priv, | |
315 | struct v4l2_tuner *v) | |
316 | { | |
317 | struct tea5764_device *radio = video_drvdata(file); | |
318 | struct tea5764_regs *r = &radio->regs; | |
319 | ||
320 | if (v->index > 0) | |
321 | return -EINVAL; | |
322 | ||
909d15a7 | 323 | memset(v, 0, sizeof(*v)); |
46a60cfe FB |
324 | strcpy(v->name, "FM"); |
325 | v->type = V4L2_TUNER_RADIO; | |
326 | tea5764_i2c_read(radio); | |
327 | v->rangelow = FREQ_MIN * FREQ_MUL; | |
328 | v->rangehigh = FREQ_MAX * FREQ_MUL; | |
329 | v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO; | |
330 | if (r->tunchk & TEA5764_TUNCHK_STEREO) | |
5543e2b4 HV |
331 | v->rxsubchans = V4L2_TUNER_SUB_STEREO; |
332 | else | |
333 | v->rxsubchans = V4L2_TUNER_SUB_MONO; | |
46a60cfe FB |
334 | v->audmode = tea5764_get_audout_mode(radio); |
335 | v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf; | |
336 | v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk); | |
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
341 | static int vidioc_s_tuner(struct file *file, void *priv, | |
342 | struct v4l2_tuner *v) | |
343 | { | |
344 | struct tea5764_device *radio = video_drvdata(file); | |
345 | ||
346 | if (v->index > 0) | |
347 | return -EINVAL; | |
348 | ||
349 | tea5764_set_audout_mode(radio, v->audmode); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static int vidioc_s_frequency(struct file *file, void *priv, | |
354 | struct v4l2_frequency *f) | |
355 | { | |
356 | struct tea5764_device *radio = video_drvdata(file); | |
357 | ||
a3a9e287 | 358 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) |
46a60cfe FB |
359 | return -EINVAL; |
360 | if (f->frequency == 0) { | |
361 | /* We special case this as a power down control. */ | |
362 | tea5764_power_down(radio); | |
363 | } | |
364 | if (f->frequency < (FREQ_MIN * FREQ_MUL)) | |
365 | return -EINVAL; | |
366 | if (f->frequency > (FREQ_MAX * FREQ_MUL)) | |
367 | return -EINVAL; | |
368 | tea5764_power_up(radio); | |
369 | tea5764_tune(radio, (f->frequency * 125) / 2); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | static int vidioc_g_frequency(struct file *file, void *priv, | |
374 | struct v4l2_frequency *f) | |
375 | { | |
376 | struct tea5764_device *radio = video_drvdata(file); | |
377 | struct tea5764_regs *r = &radio->regs; | |
378 | ||
a3a9e287 HV |
379 | if (f->tuner != 0) |
380 | return -EINVAL; | |
46a60cfe | 381 | tea5764_i2c_read(radio); |
909d15a7 | 382 | memset(f, 0, sizeof(*f)); |
46a60cfe FB |
383 | f->type = V4L2_TUNER_RADIO; |
384 | if (r->tnctrl & TEA5764_TNCTRL_PUPD0) | |
385 | f->frequency = (tea5764_get_freq(radio) * 2) / 125; | |
386 | else | |
387 | f->frequency = 0; | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | static int vidioc_queryctrl(struct file *file, void *priv, | |
393 | struct v4l2_queryctrl *qc) | |
394 | { | |
395 | int i; | |
396 | ||
397 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { | |
398 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
399 | memcpy(qc, &(radio_qctrl[i]), sizeof(*qc)); | |
400 | return 0; | |
401 | } | |
402 | } | |
403 | return -EINVAL; | |
404 | } | |
405 | ||
406 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
407 | struct v4l2_control *ctrl) | |
408 | { | |
409 | struct tea5764_device *radio = video_drvdata(file); | |
410 | ||
411 | switch (ctrl->id) { | |
412 | case V4L2_CID_AUDIO_MUTE: | |
413 | tea5764_i2c_read(radio); | |
414 | ctrl->value = tea5764_is_muted(radio) ? 1 : 0; | |
415 | return 0; | |
416 | } | |
417 | return -EINVAL; | |
418 | } | |
419 | ||
420 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
421 | struct v4l2_control *ctrl) | |
422 | { | |
423 | struct tea5764_device *radio = video_drvdata(file); | |
424 | ||
425 | switch (ctrl->id) { | |
426 | case V4L2_CID_AUDIO_MUTE: | |
427 | tea5764_mute(radio, ctrl->value); | |
428 | return 0; | |
429 | } | |
430 | return -EINVAL; | |
431 | } | |
432 | ||
433 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
434 | { | |
435 | *i = 0; | |
436 | return 0; | |
437 | } | |
438 | ||
439 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
440 | { | |
441 | if (i != 0) | |
442 | return -EINVAL; | |
443 | return 0; | |
444 | } | |
445 | ||
446 | static int vidioc_g_audio(struct file *file, void *priv, | |
447 | struct v4l2_audio *a) | |
448 | { | |
449 | if (a->index > 1) | |
450 | return -EINVAL; | |
451 | ||
452 | strcpy(a->name, "Radio"); | |
453 | a->capability = V4L2_AUDCAP_STEREO; | |
454 | return 0; | |
455 | } | |
456 | ||
457 | static int vidioc_s_audio(struct file *file, void *priv, | |
0e8025b9 | 458 | const struct v4l2_audio *a) |
46a60cfe FB |
459 | { |
460 | if (a->index != 0) | |
461 | return -EINVAL; | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
46a60cfe FB |
466 | /* File system interface */ |
467 | static const struct v4l2_file_operations tea5764_fops = { | |
468 | .owner = THIS_MODULE, | |
ee71e423 | 469 | .unlocked_ioctl = video_ioctl2, |
46a60cfe FB |
470 | }; |
471 | ||
472 | static const struct v4l2_ioctl_ops tea5764_ioctl_ops = { | |
473 | .vidioc_querycap = vidioc_querycap, | |
474 | .vidioc_g_tuner = vidioc_g_tuner, | |
475 | .vidioc_s_tuner = vidioc_s_tuner, | |
476 | .vidioc_g_audio = vidioc_g_audio, | |
477 | .vidioc_s_audio = vidioc_s_audio, | |
478 | .vidioc_g_input = vidioc_g_input, | |
479 | .vidioc_s_input = vidioc_s_input, | |
480 | .vidioc_g_frequency = vidioc_g_frequency, | |
481 | .vidioc_s_frequency = vidioc_s_frequency, | |
482 | .vidioc_queryctrl = vidioc_queryctrl, | |
483 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
484 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
485 | }; | |
486 | ||
487 | /* V4L2 interface */ | |
488 | static struct video_device tea5764_radio_template = { | |
489 | .name = "TEA5764 FM-Radio", | |
490 | .fops = &tea5764_fops, | |
491 | .ioctl_ops = &tea5764_ioctl_ops, | |
492 | .release = video_device_release, | |
493 | }; | |
494 | ||
495 | /* I2C probe: check if the device exists and register with v4l if it is */ | |
4c62e976 GKH |
496 | static int tea5764_i2c_probe(struct i2c_client *client, |
497 | const struct i2c_device_id *id) | |
46a60cfe FB |
498 | { |
499 | struct tea5764_device *radio; | |
500 | struct tea5764_regs *r; | |
501 | int ret; | |
502 | ||
503 | PDEBUG("probe"); | |
ee71e423 | 504 | radio = kzalloc(sizeof(struct tea5764_device), GFP_KERNEL); |
46a60cfe FB |
505 | if (!radio) |
506 | return -ENOMEM; | |
507 | ||
508 | mutex_init(&radio->mutex); | |
509 | radio->i2c_client = client; | |
510 | ret = tea5764_i2c_read(radio); | |
511 | if (ret) | |
512 | goto errfr; | |
513 | r = &radio->regs; | |
514 | PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid); | |
515 | if (r->chipid != TEA5764_CHIPID || | |
516 | (r->manid & 0x0fff) != TEA5764_MANID) { | |
517 | PWARN("This chip is not a TEA5764!"); | |
518 | ret = -EINVAL; | |
519 | goto errfr; | |
520 | } | |
521 | ||
522 | radio->videodev = video_device_alloc(); | |
523 | if (!(radio->videodev)) { | |
524 | ret = -ENOMEM; | |
525 | goto errfr; | |
526 | } | |
527 | memcpy(radio->videodev, &tea5764_radio_template, | |
528 | sizeof(tea5764_radio_template)); | |
529 | ||
530 | i2c_set_clientdata(client, radio); | |
531 | video_set_drvdata(radio->videodev, radio); | |
ee71e423 | 532 | radio->videodev->lock = &radio->mutex; |
46a60cfe FB |
533 | |
534 | /* initialize and power off the chip */ | |
535 | tea5764_i2c_read(radio); | |
536 | tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO); | |
537 | tea5764_mute(radio, 1); | |
538 | tea5764_power_down(radio); | |
539 | ||
ee71e423 HV |
540 | ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); |
541 | if (ret < 0) { | |
542 | PWARN("Could not register video device!"); | |
543 | goto errrel; | |
544 | } | |
545 | ||
46a60cfe FB |
546 | PINFO("registered."); |
547 | return 0; | |
548 | errrel: | |
549 | video_device_release(radio->videodev); | |
550 | errfr: | |
551 | kfree(radio); | |
552 | return ret; | |
553 | } | |
554 | ||
4c62e976 | 555 | static int tea5764_i2c_remove(struct i2c_client *client) |
46a60cfe FB |
556 | { |
557 | struct tea5764_device *radio = i2c_get_clientdata(client); | |
558 | ||
559 | PDEBUG("remove"); | |
560 | if (radio) { | |
561 | tea5764_power_down(radio); | |
562 | video_unregister_device(radio->videodev); | |
563 | kfree(radio); | |
564 | } | |
565 | return 0; | |
566 | } | |
567 | ||
568 | /* I2C subsystem interface */ | |
569 | static const struct i2c_device_id tea5764_id[] = { | |
570 | { "radio-tea5764", 0 }, | |
571 | { } /* Terminating entry */ | |
572 | }; | |
573 | MODULE_DEVICE_TABLE(i2c, tea5764_id); | |
574 | ||
575 | static struct i2c_driver tea5764_i2c_driver = { | |
576 | .driver = { | |
577 | .name = "radio-tea5764", | |
578 | .owner = THIS_MODULE, | |
579 | }, | |
580 | .probe = tea5764_i2c_probe, | |
4c62e976 | 581 | .remove = tea5764_i2c_remove, |
46a60cfe FB |
582 | .id_table = tea5764_id, |
583 | }; | |
584 | ||
c6e8d86f | 585 | module_i2c_driver(tea5764_i2c_driver); |
46a60cfe FB |
586 | |
587 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
588 | MODULE_DESCRIPTION(DRIVER_DESC); | |
589 | MODULE_LICENSE("GPL"); | |
29834c1a | 590 | MODULE_VERSION(DRIVER_VERSION); |
46a60cfe | 591 | |
731884ba | 592 | module_param(use_xtal, int, 0); |
46a60cfe FB |
593 | MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board"); |
594 | module_param(radio_nr, int, 0); | |
595 | MODULE_PARM_DESC(radio_nr, "video4linux device number to use"); |