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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> | |
42 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ | |
43 | ||
44 | #define DRIVER_VERSION "v0.01" | |
45 | #define RADIO_VERSION KERNEL_VERSION(0, 0, 1) | |
46 | ||
47 | #define DRIVER_AUTHOR "Fabio Belavenuto <belavenuto@gmail.com>" | |
48 | #define DRIVER_DESC "A driver for the TEA5764 radio chip for EZX Phones." | |
49 | ||
50 | #define PINFO(format, ...)\ | |
51 | printk(KERN_INFO KBUILD_MODNAME ": "\ | |
52 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) | |
53 | #define PWARN(format, ...)\ | |
54 | printk(KERN_WARNING KBUILD_MODNAME ": "\ | |
55 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) | |
56 | # define PDEBUG(format, ...)\ | |
57 | printk(KERN_DEBUG KBUILD_MODNAME ": "\ | |
58 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) | |
59 | ||
60 | /* Frequency limits in MHz -- these are European values. For Japanese | |
61 | devices, that would be 76000 and 91000. */ | |
62 | #define FREQ_MIN 87500 | |
63 | #define FREQ_MAX 108000 | |
64 | #define FREQ_MUL 16 | |
65 | ||
66 | /* TEA5764 registers */ | |
67 | #define TEA5764_MANID 0x002b | |
68 | #define TEA5764_CHIPID 0x5764 | |
69 | ||
70 | #define TEA5764_INTREG_BLMSK 0x0001 | |
71 | #define TEA5764_INTREG_FRRMSK 0x0002 | |
72 | #define TEA5764_INTREG_LEVMSK 0x0008 | |
73 | #define TEA5764_INTREG_IFMSK 0x0010 | |
74 | #define TEA5764_INTREG_BLMFLAG 0x0100 | |
75 | #define TEA5764_INTREG_FRRFLAG 0x0200 | |
76 | #define TEA5764_INTREG_LEVFLAG 0x0800 | |
77 | #define TEA5764_INTREG_IFFLAG 0x1000 | |
78 | ||
79 | #define TEA5764_FRQSET_SUD 0x8000 | |
80 | #define TEA5764_FRQSET_SM 0x4000 | |
81 | ||
82 | #define TEA5764_TNCTRL_PUPD1 0x8000 | |
83 | #define TEA5764_TNCTRL_PUPD0 0x4000 | |
84 | #define TEA5764_TNCTRL_BLIM 0x2000 | |
85 | #define TEA5764_TNCTRL_SWPM 0x1000 | |
86 | #define TEA5764_TNCTRL_IFCTC 0x0800 | |
87 | #define TEA5764_TNCTRL_AFM 0x0400 | |
88 | #define TEA5764_TNCTRL_SMUTE 0x0200 | |
89 | #define TEA5764_TNCTRL_SNC 0x0100 | |
90 | #define TEA5764_TNCTRL_MU 0x0080 | |
91 | #define TEA5764_TNCTRL_SSL1 0x0040 | |
92 | #define TEA5764_TNCTRL_SSL0 0x0020 | |
93 | #define TEA5764_TNCTRL_HLSI 0x0010 | |
94 | #define TEA5764_TNCTRL_MST 0x0008 | |
95 | #define TEA5764_TNCTRL_SWP 0x0004 | |
96 | #define TEA5764_TNCTRL_DTC 0x0002 | |
97 | #define TEA5764_TNCTRL_AHLSI 0x0001 | |
98 | ||
99 | #define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4) | |
100 | #define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9) | |
101 | #define TEA5764_TUNCHK_TUNTO 0x0100 | |
102 | #define TEA5764_TUNCHK_LD 0x0008 | |
103 | #define TEA5764_TUNCHK_STEREO 0x0004 | |
104 | ||
105 | #define TEA5764_TESTREG_TRIGFR 0x0800 | |
106 | ||
107 | struct tea5764_regs { | |
108 | u16 intreg; /* INTFLAG & INTMSK */ | |
109 | u16 frqset; /* FRQSETMSB & FRQSETLSB */ | |
110 | u16 tnctrl; /* TNCTRL1 & TNCTRL2 */ | |
111 | u16 frqchk; /* FRQCHKMSB & FRQCHKLSB */ | |
112 | u16 tunchk; /* IFCHK & LEVCHK */ | |
113 | u16 testreg; /* TESTBITS & TESTMODE */ | |
114 | u16 rdsstat; /* RDSSTAT1 & RDSSTAT2 */ | |
115 | u16 rdslb; /* RDSLBMSB & RDSLBLSB */ | |
116 | u16 rdspb; /* RDSPBMSB & RDSPBLSB */ | |
117 | u16 rdsbc; /* RDSBBC & RDSGBC */ | |
118 | u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */ | |
119 | u16 rdsbbl; /* PAUSEDET & RDSBBL */ | |
120 | u16 manid; /* MANID1 & MANID2 */ | |
121 | u16 chipid; /* CHIPID1 & CHIPID2 */ | |
122 | } __attribute__ ((packed)); | |
123 | ||
124 | struct tea5764_write_regs { | |
125 | u8 intreg; /* INTMSK */ | |
126 | u16 frqset; /* FRQSETMSB & FRQSETLSB */ | |
127 | u16 tnctrl; /* TNCTRL1 & TNCTRL2 */ | |
128 | u16 testreg; /* TESTBITS & TESTMODE */ | |
129 | u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */ | |
130 | u16 rdsbbl; /* PAUSEDET & RDSBBL */ | |
131 | } __attribute__ ((packed)); | |
132 | ||
133 | #ifndef RADIO_TEA5764_XTAL | |
134 | #define RADIO_TEA5764_XTAL 1 | |
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; | |
145 | int users; | |
146 | }; | |
147 | ||
148 | /* I2C code related */ | |
149 | int tea5764_i2c_read(struct tea5764_device *radio) | |
150 | { | |
151 | int i; | |
152 | u16 *p = (u16 *) &radio->regs; | |
153 | ||
154 | struct i2c_msg msgs[1] = { | |
155 | { radio->i2c_client->addr, I2C_M_RD, sizeof(radio->regs), | |
156 | (void *)&radio->regs }, | |
157 | }; | |
158 | if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) | |
159 | return -EIO; | |
160 | for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++) | |
161 | p[i] = __be16_to_cpu(p[i]); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | int tea5764_i2c_write(struct tea5764_device *radio) | |
167 | { | |
168 | struct tea5764_write_regs wr; | |
169 | struct tea5764_regs *r = &radio->regs; | |
170 | struct i2c_msg msgs[1] = { | |
171 | { radio->i2c_client->addr, 0, sizeof(wr), (void *) &wr }, | |
172 | }; | |
173 | wr.intreg = r->intreg & 0xff; | |
174 | wr.frqset = __cpu_to_be16(r->frqset); | |
175 | wr.tnctrl = __cpu_to_be16(r->tnctrl); | |
176 | wr.testreg = __cpu_to_be16(r->testreg); | |
177 | wr.rdsctrl = __cpu_to_be16(r->rdsctrl); | |
178 | wr.rdsbbl = __cpu_to_be16(r->rdsbbl); | |
179 | if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) | |
180 | return -EIO; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | /* V4L2 code related */ | |
185 | static struct v4l2_queryctrl radio_qctrl[] = { | |
186 | { | |
187 | .id = V4L2_CID_AUDIO_MUTE, | |
188 | .name = "Mute", | |
189 | .minimum = 0, | |
190 | .maximum = 1, | |
191 | .default_value = 1, | |
192 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
193 | } | |
194 | }; | |
195 | ||
196 | static void tea5764_power_up(struct tea5764_device *radio) | |
197 | { | |
198 | struct tea5764_regs *r = &radio->regs; | |
199 | ||
200 | if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) { | |
201 | r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU | | |
202 | TEA5764_TNCTRL_HLSI); | |
203 | if (!use_xtal) | |
204 | r->testreg |= TEA5764_TESTREG_TRIGFR; | |
205 | else | |
206 | r->testreg &= ~TEA5764_TESTREG_TRIGFR; | |
207 | ||
208 | r->tnctrl |= TEA5764_TNCTRL_PUPD0; | |
209 | tea5764_i2c_write(radio); | |
210 | } | |
211 | } | |
212 | ||
213 | static void tea5764_power_down(struct tea5764_device *radio) | |
214 | { | |
215 | struct tea5764_regs *r = &radio->regs; | |
216 | ||
217 | if (r->tnctrl & TEA5764_TNCTRL_PUPD0) { | |
218 | r->tnctrl &= ~TEA5764_TNCTRL_PUPD0; | |
219 | tea5764_i2c_write(radio); | |
220 | } | |
221 | } | |
222 | ||
223 | static void tea5764_set_freq(struct tea5764_device *radio, int freq) | |
224 | { | |
225 | struct tea5764_regs *r = &radio->regs; | |
226 | ||
227 | /* formula: (freq [+ or -] 225000) / 8192 */ | |
228 | if (r->tnctrl & TEA5764_TNCTRL_HLSI) | |
229 | r->frqset = (freq + 225000) / 8192; | |
230 | else | |
231 | r->frqset = (freq - 225000) / 8192; | |
232 | } | |
233 | ||
234 | static int tea5764_get_freq(struct tea5764_device *radio) | |
235 | { | |
236 | struct tea5764_regs *r = &radio->regs; | |
237 | ||
238 | if (r->tnctrl & TEA5764_TNCTRL_HLSI) | |
239 | return (r->frqchk * 8192) - 225000; | |
240 | else | |
241 | return (r->frqchk * 8192) + 225000; | |
242 | } | |
243 | ||
244 | /* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ | |
245 | static void tea5764_tune(struct tea5764_device *radio, int freq) | |
246 | { | |
247 | tea5764_set_freq(radio, freq); | |
248 | if (tea5764_i2c_write(radio)) | |
249 | PWARN("Could not set frequency!"); | |
250 | } | |
251 | ||
252 | static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode) | |
253 | { | |
254 | struct tea5764_regs *r = &radio->regs; | |
255 | int tnctrl = r->tnctrl; | |
256 | ||
257 | if (audmode == V4L2_TUNER_MODE_MONO) | |
258 | r->tnctrl |= TEA5764_TNCTRL_MST; | |
259 | else | |
260 | r->tnctrl &= ~TEA5764_TNCTRL_MST; | |
261 | if (tnctrl != r->tnctrl) | |
262 | tea5764_i2c_write(radio); | |
263 | } | |
264 | ||
265 | static int tea5764_get_audout_mode(struct tea5764_device *radio) | |
266 | { | |
267 | struct tea5764_regs *r = &radio->regs; | |
268 | ||
269 | if (r->tnctrl & TEA5764_TNCTRL_MST) | |
270 | return V4L2_TUNER_MODE_MONO; | |
271 | else | |
272 | return V4L2_TUNER_MODE_STEREO; | |
273 | } | |
274 | ||
275 | static void tea5764_mute(struct tea5764_device *radio, int on) | |
276 | { | |
277 | struct tea5764_regs *r = &radio->regs; | |
278 | int tnctrl = r->tnctrl; | |
279 | ||
280 | if (on) | |
281 | r->tnctrl |= TEA5764_TNCTRL_MU; | |
282 | else | |
283 | r->tnctrl &= ~TEA5764_TNCTRL_MU; | |
284 | if (tnctrl != r->tnctrl) | |
285 | tea5764_i2c_write(radio); | |
286 | } | |
287 | ||
288 | static int tea5764_is_muted(struct tea5764_device *radio) | |
289 | { | |
290 | return radio->regs.tnctrl & TEA5764_TNCTRL_MU; | |
291 | } | |
292 | ||
293 | /* V4L2 vidioc */ | |
294 | static int vidioc_querycap(struct file *file, void *priv, | |
295 | struct v4l2_capability *v) | |
296 | { | |
297 | struct tea5764_device *radio = video_drvdata(file); | |
298 | struct video_device *dev = radio->videodev; | |
299 | ||
300 | strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver)); | |
301 | strlcpy(v->card, dev->name, sizeof(v->card)); | |
c3ef01ce KS |
302 | snprintf(v->bus_info, sizeof(v->bus_info), |
303 | "I2C:%s", dev_name(&dev->dev)); | |
46a60cfe FB |
304 | v->version = RADIO_VERSION; |
305 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; | |
306 | return 0; | |
307 | } | |
308 | ||
309 | static int vidioc_g_tuner(struct file *file, void *priv, | |
310 | struct v4l2_tuner *v) | |
311 | { | |
312 | struct tea5764_device *radio = video_drvdata(file); | |
313 | struct tea5764_regs *r = &radio->regs; | |
314 | ||
315 | if (v->index > 0) | |
316 | return -EINVAL; | |
317 | ||
909d15a7 | 318 | memset(v, 0, sizeof(*v)); |
46a60cfe FB |
319 | strcpy(v->name, "FM"); |
320 | v->type = V4L2_TUNER_RADIO; | |
321 | tea5764_i2c_read(radio); | |
322 | v->rangelow = FREQ_MIN * FREQ_MUL; | |
323 | v->rangehigh = FREQ_MAX * FREQ_MUL; | |
324 | v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO; | |
325 | if (r->tunchk & TEA5764_TUNCHK_STEREO) | |
5543e2b4 HV |
326 | v->rxsubchans = V4L2_TUNER_SUB_STEREO; |
327 | else | |
328 | v->rxsubchans = V4L2_TUNER_SUB_MONO; | |
46a60cfe FB |
329 | v->audmode = tea5764_get_audout_mode(radio); |
330 | v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf; | |
331 | v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk); | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | static int vidioc_s_tuner(struct file *file, void *priv, | |
337 | struct v4l2_tuner *v) | |
338 | { | |
339 | struct tea5764_device *radio = video_drvdata(file); | |
340 | ||
341 | if (v->index > 0) | |
342 | return -EINVAL; | |
343 | ||
344 | tea5764_set_audout_mode(radio, v->audmode); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | static int vidioc_s_frequency(struct file *file, void *priv, | |
349 | struct v4l2_frequency *f) | |
350 | { | |
351 | struct tea5764_device *radio = video_drvdata(file); | |
352 | ||
a3a9e287 | 353 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) |
46a60cfe FB |
354 | return -EINVAL; |
355 | if (f->frequency == 0) { | |
356 | /* We special case this as a power down control. */ | |
357 | tea5764_power_down(radio); | |
358 | } | |
359 | if (f->frequency < (FREQ_MIN * FREQ_MUL)) | |
360 | return -EINVAL; | |
361 | if (f->frequency > (FREQ_MAX * FREQ_MUL)) | |
362 | return -EINVAL; | |
363 | tea5764_power_up(radio); | |
364 | tea5764_tune(radio, (f->frequency * 125) / 2); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | static int vidioc_g_frequency(struct file *file, void *priv, | |
369 | struct v4l2_frequency *f) | |
370 | { | |
371 | struct tea5764_device *radio = video_drvdata(file); | |
372 | struct tea5764_regs *r = &radio->regs; | |
373 | ||
a3a9e287 HV |
374 | if (f->tuner != 0) |
375 | return -EINVAL; | |
46a60cfe | 376 | tea5764_i2c_read(radio); |
909d15a7 | 377 | memset(f, 0, sizeof(*f)); |
46a60cfe FB |
378 | f->type = V4L2_TUNER_RADIO; |
379 | if (r->tnctrl & TEA5764_TNCTRL_PUPD0) | |
380 | f->frequency = (tea5764_get_freq(radio) * 2) / 125; | |
381 | else | |
382 | f->frequency = 0; | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | static int vidioc_queryctrl(struct file *file, void *priv, | |
388 | struct v4l2_queryctrl *qc) | |
389 | { | |
390 | int i; | |
391 | ||
392 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { | |
393 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
394 | memcpy(qc, &(radio_qctrl[i]), sizeof(*qc)); | |
395 | return 0; | |
396 | } | |
397 | } | |
398 | return -EINVAL; | |
399 | } | |
400 | ||
401 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
402 | struct v4l2_control *ctrl) | |
403 | { | |
404 | struct tea5764_device *radio = video_drvdata(file); | |
405 | ||
406 | switch (ctrl->id) { | |
407 | case V4L2_CID_AUDIO_MUTE: | |
408 | tea5764_i2c_read(radio); | |
409 | ctrl->value = tea5764_is_muted(radio) ? 1 : 0; | |
410 | return 0; | |
411 | } | |
412 | return -EINVAL; | |
413 | } | |
414 | ||
415 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
416 | struct v4l2_control *ctrl) | |
417 | { | |
418 | struct tea5764_device *radio = video_drvdata(file); | |
419 | ||
420 | switch (ctrl->id) { | |
421 | case V4L2_CID_AUDIO_MUTE: | |
422 | tea5764_mute(radio, ctrl->value); | |
423 | return 0; | |
424 | } | |
425 | return -EINVAL; | |
426 | } | |
427 | ||
428 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
429 | { | |
430 | *i = 0; | |
431 | return 0; | |
432 | } | |
433 | ||
434 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
435 | { | |
436 | if (i != 0) | |
437 | return -EINVAL; | |
438 | return 0; | |
439 | } | |
440 | ||
441 | static int vidioc_g_audio(struct file *file, void *priv, | |
442 | struct v4l2_audio *a) | |
443 | { | |
444 | if (a->index > 1) | |
445 | return -EINVAL; | |
446 | ||
447 | strcpy(a->name, "Radio"); | |
448 | a->capability = V4L2_AUDCAP_STEREO; | |
449 | return 0; | |
450 | } | |
451 | ||
452 | static int vidioc_s_audio(struct file *file, void *priv, | |
453 | struct v4l2_audio *a) | |
454 | { | |
455 | if (a->index != 0) | |
456 | return -EINVAL; | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static int tea5764_open(struct file *file) | |
462 | { | |
463 | /* Currently we support only one device */ | |
46a60cfe FB |
464 | struct tea5764_device *radio = video_drvdata(file); |
465 | ||
46a60cfe FB |
466 | mutex_lock(&radio->mutex); |
467 | /* Only exclusive access */ | |
468 | if (radio->users) { | |
469 | mutex_unlock(&radio->mutex); | |
470 | return -EBUSY; | |
471 | } | |
472 | radio->users++; | |
473 | mutex_unlock(&radio->mutex); | |
474 | file->private_data = radio; | |
475 | return 0; | |
476 | } | |
477 | ||
478 | static int tea5764_close(struct file *file) | |
479 | { | |
480 | struct tea5764_device *radio = video_drvdata(file); | |
481 | ||
482 | if (!radio) | |
483 | return -ENODEV; | |
484 | mutex_lock(&radio->mutex); | |
485 | radio->users--; | |
486 | mutex_unlock(&radio->mutex); | |
487 | return 0; | |
488 | } | |
489 | ||
490 | /* File system interface */ | |
491 | static const struct v4l2_file_operations tea5764_fops = { | |
492 | .owner = THIS_MODULE, | |
493 | .open = tea5764_open, | |
494 | .release = tea5764_close, | |
495 | .ioctl = video_ioctl2, | |
496 | }; | |
497 | ||
498 | static const struct v4l2_ioctl_ops tea5764_ioctl_ops = { | |
499 | .vidioc_querycap = vidioc_querycap, | |
500 | .vidioc_g_tuner = vidioc_g_tuner, | |
501 | .vidioc_s_tuner = vidioc_s_tuner, | |
502 | .vidioc_g_audio = vidioc_g_audio, | |
503 | .vidioc_s_audio = vidioc_s_audio, | |
504 | .vidioc_g_input = vidioc_g_input, | |
505 | .vidioc_s_input = vidioc_s_input, | |
506 | .vidioc_g_frequency = vidioc_g_frequency, | |
507 | .vidioc_s_frequency = vidioc_s_frequency, | |
508 | .vidioc_queryctrl = vidioc_queryctrl, | |
509 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
510 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
511 | }; | |
512 | ||
513 | /* V4L2 interface */ | |
514 | static struct video_device tea5764_radio_template = { | |
515 | .name = "TEA5764 FM-Radio", | |
516 | .fops = &tea5764_fops, | |
517 | .ioctl_ops = &tea5764_ioctl_ops, | |
518 | .release = video_device_release, | |
519 | }; | |
520 | ||
521 | /* I2C probe: check if the device exists and register with v4l if it is */ | |
522 | static int __devinit tea5764_i2c_probe(struct i2c_client *client, | |
523 | const struct i2c_device_id *id) | |
524 | { | |
525 | struct tea5764_device *radio; | |
526 | struct tea5764_regs *r; | |
527 | int ret; | |
528 | ||
529 | PDEBUG("probe"); | |
530 | radio = kmalloc(sizeof(struct tea5764_device), GFP_KERNEL); | |
531 | if (!radio) | |
532 | return -ENOMEM; | |
533 | ||
534 | mutex_init(&radio->mutex); | |
535 | radio->i2c_client = client; | |
536 | ret = tea5764_i2c_read(radio); | |
537 | if (ret) | |
538 | goto errfr; | |
539 | r = &radio->regs; | |
540 | PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid); | |
541 | if (r->chipid != TEA5764_CHIPID || | |
542 | (r->manid & 0x0fff) != TEA5764_MANID) { | |
543 | PWARN("This chip is not a TEA5764!"); | |
544 | ret = -EINVAL; | |
545 | goto errfr; | |
546 | } | |
547 | ||
548 | radio->videodev = video_device_alloc(); | |
549 | if (!(radio->videodev)) { | |
550 | ret = -ENOMEM; | |
551 | goto errfr; | |
552 | } | |
553 | memcpy(radio->videodev, &tea5764_radio_template, | |
554 | sizeof(tea5764_radio_template)); | |
555 | ||
556 | i2c_set_clientdata(client, radio); | |
557 | video_set_drvdata(radio->videodev, radio); | |
558 | ||
559 | ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); | |
560 | if (ret < 0) { | |
561 | PWARN("Could not register video device!"); | |
562 | goto errrel; | |
563 | } | |
564 | ||
565 | /* initialize and power off the chip */ | |
566 | tea5764_i2c_read(radio); | |
567 | tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO); | |
568 | tea5764_mute(radio, 1); | |
569 | tea5764_power_down(radio); | |
570 | ||
571 | PINFO("registered."); | |
572 | return 0; | |
573 | errrel: | |
574 | video_device_release(radio->videodev); | |
575 | errfr: | |
576 | kfree(radio); | |
577 | return ret; | |
578 | } | |
579 | ||
580 | static int __devexit tea5764_i2c_remove(struct i2c_client *client) | |
581 | { | |
582 | struct tea5764_device *radio = i2c_get_clientdata(client); | |
583 | ||
584 | PDEBUG("remove"); | |
585 | if (radio) { | |
586 | tea5764_power_down(radio); | |
587 | video_unregister_device(radio->videodev); | |
588 | kfree(radio); | |
589 | } | |
590 | return 0; | |
591 | } | |
592 | ||
593 | /* I2C subsystem interface */ | |
594 | static const struct i2c_device_id tea5764_id[] = { | |
595 | { "radio-tea5764", 0 }, | |
596 | { } /* Terminating entry */ | |
597 | }; | |
598 | MODULE_DEVICE_TABLE(i2c, tea5764_id); | |
599 | ||
600 | static struct i2c_driver tea5764_i2c_driver = { | |
601 | .driver = { | |
602 | .name = "radio-tea5764", | |
603 | .owner = THIS_MODULE, | |
604 | }, | |
605 | .probe = tea5764_i2c_probe, | |
606 | .remove = __devexit_p(tea5764_i2c_remove), | |
607 | .id_table = tea5764_id, | |
608 | }; | |
609 | ||
610 | /* init the driver */ | |
611 | static int __init tea5764_init(void) | |
612 | { | |
613 | int ret = i2c_add_driver(&tea5764_i2c_driver); | |
614 | ||
615 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ": " | |
616 | DRIVER_DESC "\n"); | |
617 | return ret; | |
618 | } | |
619 | ||
620 | /* cleanup the driver */ | |
621 | static void __exit tea5764_exit(void) | |
622 | { | |
623 | i2c_del_driver(&tea5764_i2c_driver); | |
624 | } | |
625 | ||
626 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
627 | MODULE_DESCRIPTION(DRIVER_DESC); | |
628 | MODULE_LICENSE("GPL"); | |
629 | ||
630 | module_param(use_xtal, int, 1); | |
631 | MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board"); | |
632 | module_param(radio_nr, int, 0); | |
633 | MODULE_PARM_DESC(radio_nr, "video4linux device number to use"); | |
634 | ||
635 | module_init(tea5764_init); | |
636 | module_exit(tea5764_exit); |