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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; | |
46a60cfe FB |
145 | }; |
146 | ||
147 | /* I2C code related */ | |
148 | int tea5764_i2c_read(struct tea5764_device *radio) | |
149 | { | |
150 | int i; | |
151 | u16 *p = (u16 *) &radio->regs; | |
152 | ||
153 | struct i2c_msg msgs[1] = { | |
154 | { radio->i2c_client->addr, I2C_M_RD, sizeof(radio->regs), | |
155 | (void *)&radio->regs }, | |
156 | }; | |
157 | if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) | |
158 | return -EIO; | |
159 | for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++) | |
160 | p[i] = __be16_to_cpu(p[i]); | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | int tea5764_i2c_write(struct tea5764_device *radio) | |
166 | { | |
167 | struct tea5764_write_regs wr; | |
168 | struct tea5764_regs *r = &radio->regs; | |
169 | struct i2c_msg msgs[1] = { | |
170 | { radio->i2c_client->addr, 0, sizeof(wr), (void *) &wr }, | |
171 | }; | |
172 | wr.intreg = r->intreg & 0xff; | |
173 | wr.frqset = __cpu_to_be16(r->frqset); | |
174 | wr.tnctrl = __cpu_to_be16(r->tnctrl); | |
175 | wr.testreg = __cpu_to_be16(r->testreg); | |
176 | wr.rdsctrl = __cpu_to_be16(r->rdsctrl); | |
177 | wr.rdsbbl = __cpu_to_be16(r->rdsbbl); | |
178 | if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) | |
179 | return -EIO; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | /* V4L2 code related */ | |
184 | static struct v4l2_queryctrl radio_qctrl[] = { | |
185 | { | |
186 | .id = V4L2_CID_AUDIO_MUTE, | |
187 | .name = "Mute", | |
188 | .minimum = 0, | |
189 | .maximum = 1, | |
190 | .default_value = 1, | |
191 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
192 | } | |
193 | }; | |
194 | ||
195 | static void tea5764_power_up(struct tea5764_device *radio) | |
196 | { | |
197 | struct tea5764_regs *r = &radio->regs; | |
198 | ||
199 | if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) { | |
200 | r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU | | |
201 | TEA5764_TNCTRL_HLSI); | |
202 | if (!use_xtal) | |
203 | r->testreg |= TEA5764_TESTREG_TRIGFR; | |
204 | else | |
205 | r->testreg &= ~TEA5764_TESTREG_TRIGFR; | |
206 | ||
207 | r->tnctrl |= TEA5764_TNCTRL_PUPD0; | |
208 | tea5764_i2c_write(radio); | |
209 | } | |
210 | } | |
211 | ||
212 | static void tea5764_power_down(struct tea5764_device *radio) | |
213 | { | |
214 | struct tea5764_regs *r = &radio->regs; | |
215 | ||
216 | if (r->tnctrl & TEA5764_TNCTRL_PUPD0) { | |
217 | r->tnctrl &= ~TEA5764_TNCTRL_PUPD0; | |
218 | tea5764_i2c_write(radio); | |
219 | } | |
220 | } | |
221 | ||
222 | static void tea5764_set_freq(struct tea5764_device *radio, int freq) | |
223 | { | |
224 | struct tea5764_regs *r = &radio->regs; | |
225 | ||
226 | /* formula: (freq [+ or -] 225000) / 8192 */ | |
227 | if (r->tnctrl & TEA5764_TNCTRL_HLSI) | |
228 | r->frqset = (freq + 225000) / 8192; | |
229 | else | |
230 | r->frqset = (freq - 225000) / 8192; | |
231 | } | |
232 | ||
233 | static int tea5764_get_freq(struct tea5764_device *radio) | |
234 | { | |
235 | struct tea5764_regs *r = &radio->regs; | |
236 | ||
237 | if (r->tnctrl & TEA5764_TNCTRL_HLSI) | |
238 | return (r->frqchk * 8192) - 225000; | |
239 | else | |
240 | return (r->frqchk * 8192) + 225000; | |
241 | } | |
242 | ||
243 | /* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ | |
244 | static void tea5764_tune(struct tea5764_device *radio, int freq) | |
245 | { | |
246 | tea5764_set_freq(radio, freq); | |
247 | if (tea5764_i2c_write(radio)) | |
248 | PWARN("Could not set frequency!"); | |
249 | } | |
250 | ||
251 | static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode) | |
252 | { | |
253 | struct tea5764_regs *r = &radio->regs; | |
254 | int tnctrl = r->tnctrl; | |
255 | ||
256 | if (audmode == V4L2_TUNER_MODE_MONO) | |
257 | r->tnctrl |= TEA5764_TNCTRL_MST; | |
258 | else | |
259 | r->tnctrl &= ~TEA5764_TNCTRL_MST; | |
260 | if (tnctrl != r->tnctrl) | |
261 | tea5764_i2c_write(radio); | |
262 | } | |
263 | ||
264 | static int tea5764_get_audout_mode(struct tea5764_device *radio) | |
265 | { | |
266 | struct tea5764_regs *r = &radio->regs; | |
267 | ||
268 | if (r->tnctrl & TEA5764_TNCTRL_MST) | |
269 | return V4L2_TUNER_MODE_MONO; | |
270 | else | |
271 | return V4L2_TUNER_MODE_STEREO; | |
272 | } | |
273 | ||
274 | static void tea5764_mute(struct tea5764_device *radio, int on) | |
275 | { | |
276 | struct tea5764_regs *r = &radio->regs; | |
277 | int tnctrl = r->tnctrl; | |
278 | ||
279 | if (on) | |
280 | r->tnctrl |= TEA5764_TNCTRL_MU; | |
281 | else | |
282 | r->tnctrl &= ~TEA5764_TNCTRL_MU; | |
283 | if (tnctrl != r->tnctrl) | |
284 | tea5764_i2c_write(radio); | |
285 | } | |
286 | ||
287 | static int tea5764_is_muted(struct tea5764_device *radio) | |
288 | { | |
289 | return radio->regs.tnctrl & TEA5764_TNCTRL_MU; | |
290 | } | |
291 | ||
292 | /* V4L2 vidioc */ | |
293 | static int vidioc_querycap(struct file *file, void *priv, | |
294 | struct v4l2_capability *v) | |
295 | { | |
296 | struct tea5764_device *radio = video_drvdata(file); | |
297 | struct video_device *dev = radio->videodev; | |
298 | ||
299 | strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver)); | |
300 | strlcpy(v->card, dev->name, sizeof(v->card)); | |
c3ef01ce KS |
301 | snprintf(v->bus_info, sizeof(v->bus_info), |
302 | "I2C:%s", dev_name(&dev->dev)); | |
46a60cfe FB |
303 | v->version = RADIO_VERSION; |
304 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; | |
305 | return 0; | |
306 | } | |
307 | ||
308 | static int vidioc_g_tuner(struct file *file, void *priv, | |
309 | struct v4l2_tuner *v) | |
310 | { | |
311 | struct tea5764_device *radio = video_drvdata(file); | |
312 | struct tea5764_regs *r = &radio->regs; | |
313 | ||
314 | if (v->index > 0) | |
315 | return -EINVAL; | |
316 | ||
909d15a7 | 317 | memset(v, 0, sizeof(*v)); |
46a60cfe FB |
318 | strcpy(v->name, "FM"); |
319 | v->type = V4L2_TUNER_RADIO; | |
320 | tea5764_i2c_read(radio); | |
321 | v->rangelow = FREQ_MIN * FREQ_MUL; | |
322 | v->rangehigh = FREQ_MAX * FREQ_MUL; | |
323 | v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO; | |
324 | if (r->tunchk & TEA5764_TUNCHK_STEREO) | |
5543e2b4 HV |
325 | v->rxsubchans = V4L2_TUNER_SUB_STEREO; |
326 | else | |
327 | v->rxsubchans = V4L2_TUNER_SUB_MONO; | |
46a60cfe FB |
328 | v->audmode = tea5764_get_audout_mode(radio); |
329 | v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf; | |
330 | v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk); | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | static int vidioc_s_tuner(struct file *file, void *priv, | |
336 | struct v4l2_tuner *v) | |
337 | { | |
338 | struct tea5764_device *radio = video_drvdata(file); | |
339 | ||
340 | if (v->index > 0) | |
341 | return -EINVAL; | |
342 | ||
343 | tea5764_set_audout_mode(radio, v->audmode); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | static int vidioc_s_frequency(struct file *file, void *priv, | |
348 | struct v4l2_frequency *f) | |
349 | { | |
350 | struct tea5764_device *radio = video_drvdata(file); | |
351 | ||
a3a9e287 | 352 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) |
46a60cfe FB |
353 | return -EINVAL; |
354 | if (f->frequency == 0) { | |
355 | /* We special case this as a power down control. */ | |
356 | tea5764_power_down(radio); | |
357 | } | |
358 | if (f->frequency < (FREQ_MIN * FREQ_MUL)) | |
359 | return -EINVAL; | |
360 | if (f->frequency > (FREQ_MAX * FREQ_MUL)) | |
361 | return -EINVAL; | |
362 | tea5764_power_up(radio); | |
363 | tea5764_tune(radio, (f->frequency * 125) / 2); | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int vidioc_g_frequency(struct file *file, void *priv, | |
368 | struct v4l2_frequency *f) | |
369 | { | |
370 | struct tea5764_device *radio = video_drvdata(file); | |
371 | struct tea5764_regs *r = &radio->regs; | |
372 | ||
a3a9e287 HV |
373 | if (f->tuner != 0) |
374 | return -EINVAL; | |
46a60cfe | 375 | tea5764_i2c_read(radio); |
909d15a7 | 376 | memset(f, 0, sizeof(*f)); |
46a60cfe FB |
377 | f->type = V4L2_TUNER_RADIO; |
378 | if (r->tnctrl & TEA5764_TNCTRL_PUPD0) | |
379 | f->frequency = (tea5764_get_freq(radio) * 2) / 125; | |
380 | else | |
381 | f->frequency = 0; | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | static int vidioc_queryctrl(struct file *file, void *priv, | |
387 | struct v4l2_queryctrl *qc) | |
388 | { | |
389 | int i; | |
390 | ||
391 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { | |
392 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
393 | memcpy(qc, &(radio_qctrl[i]), sizeof(*qc)); | |
394 | return 0; | |
395 | } | |
396 | } | |
397 | return -EINVAL; | |
398 | } | |
399 | ||
400 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
401 | struct v4l2_control *ctrl) | |
402 | { | |
403 | struct tea5764_device *radio = video_drvdata(file); | |
404 | ||
405 | switch (ctrl->id) { | |
406 | case V4L2_CID_AUDIO_MUTE: | |
407 | tea5764_i2c_read(radio); | |
408 | ctrl->value = tea5764_is_muted(radio) ? 1 : 0; | |
409 | return 0; | |
410 | } | |
411 | return -EINVAL; | |
412 | } | |
413 | ||
414 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
415 | struct v4l2_control *ctrl) | |
416 | { | |
417 | struct tea5764_device *radio = video_drvdata(file); | |
418 | ||
419 | switch (ctrl->id) { | |
420 | case V4L2_CID_AUDIO_MUTE: | |
421 | tea5764_mute(radio, ctrl->value); | |
422 | return 0; | |
423 | } | |
424 | return -EINVAL; | |
425 | } | |
426 | ||
427 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
428 | { | |
429 | *i = 0; | |
430 | return 0; | |
431 | } | |
432 | ||
433 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
434 | { | |
435 | if (i != 0) | |
436 | return -EINVAL; | |
437 | return 0; | |
438 | } | |
439 | ||
440 | static int vidioc_g_audio(struct file *file, void *priv, | |
441 | struct v4l2_audio *a) | |
442 | { | |
443 | if (a->index > 1) | |
444 | return -EINVAL; | |
445 | ||
446 | strcpy(a->name, "Radio"); | |
447 | a->capability = V4L2_AUDCAP_STEREO; | |
448 | return 0; | |
449 | } | |
450 | ||
451 | static int vidioc_s_audio(struct file *file, void *priv, | |
452 | struct v4l2_audio *a) | |
453 | { | |
454 | if (a->index != 0) | |
455 | return -EINVAL; | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
46a60cfe FB |
460 | /* File system interface */ |
461 | static const struct v4l2_file_operations tea5764_fops = { | |
462 | .owner = THIS_MODULE, | |
ee71e423 | 463 | .unlocked_ioctl = video_ioctl2, |
46a60cfe FB |
464 | }; |
465 | ||
466 | static const struct v4l2_ioctl_ops tea5764_ioctl_ops = { | |
467 | .vidioc_querycap = vidioc_querycap, | |
468 | .vidioc_g_tuner = vidioc_g_tuner, | |
469 | .vidioc_s_tuner = vidioc_s_tuner, | |
470 | .vidioc_g_audio = vidioc_g_audio, | |
471 | .vidioc_s_audio = vidioc_s_audio, | |
472 | .vidioc_g_input = vidioc_g_input, | |
473 | .vidioc_s_input = vidioc_s_input, | |
474 | .vidioc_g_frequency = vidioc_g_frequency, | |
475 | .vidioc_s_frequency = vidioc_s_frequency, | |
476 | .vidioc_queryctrl = vidioc_queryctrl, | |
477 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
478 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
479 | }; | |
480 | ||
481 | /* V4L2 interface */ | |
482 | static struct video_device tea5764_radio_template = { | |
483 | .name = "TEA5764 FM-Radio", | |
484 | .fops = &tea5764_fops, | |
485 | .ioctl_ops = &tea5764_ioctl_ops, | |
486 | .release = video_device_release, | |
487 | }; | |
488 | ||
489 | /* I2C probe: check if the device exists and register with v4l if it is */ | |
490 | static int __devinit tea5764_i2c_probe(struct i2c_client *client, | |
491 | const struct i2c_device_id *id) | |
492 | { | |
493 | struct tea5764_device *radio; | |
494 | struct tea5764_regs *r; | |
495 | int ret; | |
496 | ||
497 | PDEBUG("probe"); | |
ee71e423 | 498 | radio = kzalloc(sizeof(struct tea5764_device), GFP_KERNEL); |
46a60cfe FB |
499 | if (!radio) |
500 | return -ENOMEM; | |
501 | ||
502 | mutex_init(&radio->mutex); | |
503 | radio->i2c_client = client; | |
504 | ret = tea5764_i2c_read(radio); | |
505 | if (ret) | |
506 | goto errfr; | |
507 | r = &radio->regs; | |
508 | PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid); | |
509 | if (r->chipid != TEA5764_CHIPID || | |
510 | (r->manid & 0x0fff) != TEA5764_MANID) { | |
511 | PWARN("This chip is not a TEA5764!"); | |
512 | ret = -EINVAL; | |
513 | goto errfr; | |
514 | } | |
515 | ||
516 | radio->videodev = video_device_alloc(); | |
517 | if (!(radio->videodev)) { | |
518 | ret = -ENOMEM; | |
519 | goto errfr; | |
520 | } | |
521 | memcpy(radio->videodev, &tea5764_radio_template, | |
522 | sizeof(tea5764_radio_template)); | |
523 | ||
524 | i2c_set_clientdata(client, radio); | |
525 | video_set_drvdata(radio->videodev, radio); | |
ee71e423 | 526 | radio->videodev->lock = &radio->mutex; |
46a60cfe FB |
527 | |
528 | /* initialize and power off the chip */ | |
529 | tea5764_i2c_read(radio); | |
530 | tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO); | |
531 | tea5764_mute(radio, 1); | |
532 | tea5764_power_down(radio); | |
533 | ||
ee71e423 HV |
534 | ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); |
535 | if (ret < 0) { | |
536 | PWARN("Could not register video device!"); | |
537 | goto errrel; | |
538 | } | |
539 | ||
46a60cfe FB |
540 | PINFO("registered."); |
541 | return 0; | |
542 | errrel: | |
543 | video_device_release(radio->videodev); | |
544 | errfr: | |
545 | kfree(radio); | |
546 | return ret; | |
547 | } | |
548 | ||
549 | static int __devexit tea5764_i2c_remove(struct i2c_client *client) | |
550 | { | |
551 | struct tea5764_device *radio = i2c_get_clientdata(client); | |
552 | ||
553 | PDEBUG("remove"); | |
554 | if (radio) { | |
555 | tea5764_power_down(radio); | |
556 | video_unregister_device(radio->videodev); | |
557 | kfree(radio); | |
558 | } | |
559 | return 0; | |
560 | } | |
561 | ||
562 | /* I2C subsystem interface */ | |
563 | static const struct i2c_device_id tea5764_id[] = { | |
564 | { "radio-tea5764", 0 }, | |
565 | { } /* Terminating entry */ | |
566 | }; | |
567 | MODULE_DEVICE_TABLE(i2c, tea5764_id); | |
568 | ||
569 | static struct i2c_driver tea5764_i2c_driver = { | |
570 | .driver = { | |
571 | .name = "radio-tea5764", | |
572 | .owner = THIS_MODULE, | |
573 | }, | |
574 | .probe = tea5764_i2c_probe, | |
575 | .remove = __devexit_p(tea5764_i2c_remove), | |
576 | .id_table = tea5764_id, | |
577 | }; | |
578 | ||
579 | /* init the driver */ | |
580 | static int __init tea5764_init(void) | |
581 | { | |
582 | int ret = i2c_add_driver(&tea5764_i2c_driver); | |
583 | ||
584 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ": " | |
585 | DRIVER_DESC "\n"); | |
586 | return ret; | |
587 | } | |
588 | ||
589 | /* cleanup the driver */ | |
590 | static void __exit tea5764_exit(void) | |
591 | { | |
592 | i2c_del_driver(&tea5764_i2c_driver); | |
593 | } | |
594 | ||
595 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
596 | MODULE_DESCRIPTION(DRIVER_DESC); | |
597 | MODULE_LICENSE("GPL"); | |
598 | ||
599 | module_param(use_xtal, int, 1); | |
600 | MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board"); | |
601 | module_param(radio_nr, int, 0); | |
602 | MODULE_PARM_DESC(radio_nr, "video4linux device number to use"); | |
603 | ||
604 | module_init(tea5764_init); | |
605 | module_exit(tea5764_exit); |