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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / radio / radio-maestro.c
1 /* Maestro PCI sound card radio driver for Linux support
2 * (c) 2000 A. Tlalka, atlka@pg.gda.pl
3 * Notes on the hardware
4 *
5 * + Frequency control is done digitally
6 * + No volume control - only mute/unmute - you have to use Aux line volume
7 * control on Maestro card to set the volume
8 * + Radio status (tuned/not_tuned and stereo/mono) is valid some time after
9 * frequency setting (>100ms) and only when the radio is unmuted.
10 * version 0.02
11 * + io port is automatically detected - only the first radio is used
12 * version 0.03
13 * + thread access locking additions
14 * version 0.04
15 * + code improvements
16 * + VIDEO_TUNER_LOW is permanent
17 *
18 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
19 */
20
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/ioport.h>
24 #include <linux/delay.h>
25 #include <linux/sched.h>
26 #include <asm/io.h>
27 #include <asm/uaccess.h>
28 #include <linux/mutex.h>
29 #include <linux/pci.h>
30 #include <linux/videodev2.h>
31 #include <media/v4l2-common.h>
32
33 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
34 #define RADIO_VERSION KERNEL_VERSION(0,0,6)
35 #define DRIVER_VERSION "0.06"
36
37 static struct v4l2_queryctrl radio_qctrl[] = {
38 {
39 .id = V4L2_CID_AUDIO_MUTE,
40 .name = "Mute",
41 .minimum = 0,
42 .maximum = 1,
43 .default_value = 1,
44 .type = V4L2_CTRL_TYPE_BOOLEAN,
45 }
46 };
47
48 #define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
49
50 #define IO_MASK 4 /* mask register offset from GPIO_DATA
51 bits 1=unmask write to given bit */
52 #define IO_DIR 8 /* direction register offset from GPIO_DATA
53 bits 0/1=read/write direction */
54
55 #define GPIO6 0x0040 /* mask bits for GPIO lines */
56 #define GPIO7 0x0080
57 #define GPIO8 0x0100
58 #define GPIO9 0x0200
59
60 #define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
61 #define STR_CLK GPIO7
62 #define STR_WREN GPIO8
63 #define STR_MOST GPIO9
64
65 #define FREQ_LO 50*16000
66 #define FREQ_HI 150*16000
67
68 #define FREQ_IF 171200 /* 10.7*16000 */
69 #define FREQ_STEP 200 /* 12.5*16 */
70
71 #define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
72 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
73
74 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
75
76 static int radio_nr = -1;
77 module_param(radio_nr, int, 0);
78
79 static int radio_ioctl(struct inode *inode, struct file *file,
80 unsigned int cmd, unsigned long arg);
81 static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
82 static void maestro_remove(struct pci_dev *pdev);
83
84 static struct pci_device_id maestro_r_pci_tbl[] = {
85 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
86 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
87 .class_mask = 0xffff00 },
88 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
89 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
90 .class_mask = 0xffff00 },
91 { 0 }
92 };
93 MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
94
95 static struct pci_driver maestro_r_driver = {
96 .name = "maestro_radio",
97 .id_table = maestro_r_pci_tbl,
98 .probe = maestro_probe,
99 .remove = __devexit_p(maestro_remove),
100 };
101
102 static const struct file_operations maestro_fops = {
103 .owner = THIS_MODULE,
104 .open = video_exclusive_open,
105 .release = video_exclusive_release,
106 .ioctl = radio_ioctl,
107 .compat_ioctl = v4l_compat_ioctl32,
108 .llseek = no_llseek,
109 };
110
111 static struct video_device maestro_radio = {
112 .name = "Maestro radio",
113 .type = VID_TYPE_TUNER,
114 .hardware = 0,
115 .fops = &maestro_fops,
116 };
117
118 struct radio_device {
119 u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
120 muted, /* VIDEO_AUDIO_MUTE */
121 stereo, /* VIDEO_TUNER_STEREO_ON */
122 tuned; /* signal strength (0 or 0xffff) */
123 struct mutex lock;
124 };
125
126 static u32 radio_bits_get(struct radio_device *dev)
127 {
128 register u16 io=dev->io, l, rdata;
129 register u32 data=0;
130 u16 omask;
131
132 omask = inw(io + IO_MASK);
133 outw(~(STR_CLK | STR_WREN), io + IO_MASK);
134 outw(0, io);
135 udelay(16);
136
137 for (l=24;l--;) {
138 outw(STR_CLK, io); /* HI state */
139 udelay(2);
140 if(!l)
141 dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
142 outw(0, io); /* LO state */
143 udelay(2);
144 data <<= 1; /* shift data */
145 rdata = inw(io);
146 if(!l)
147 dev->stereo = rdata & STR_MOST ?
148 0 : 1;
149 else
150 if(rdata & STR_DATA)
151 data++;
152 udelay(2);
153 }
154
155 if(dev->muted)
156 outw(STR_WREN, io);
157
158 udelay(4);
159 outw(omask, io + IO_MASK);
160
161 return data & 0x3ffe;
162 }
163
164 static void radio_bits_set(struct radio_device *dev, u32 data)
165 {
166 register u16 io=dev->io, l, bits;
167 u16 omask, odir;
168
169 omask = inw(io + IO_MASK);
170 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
171 outw(odir | STR_DATA, io + IO_DIR);
172 outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
173 udelay(16);
174 for (l=25;l;l--) {
175 bits = ((data >> 18) & STR_DATA) | STR_WREN ;
176 data <<= 1; /* shift data */
177 outw(bits, io); /* start strobe */
178 udelay(2);
179 outw(bits | STR_CLK, io); /* HI level */
180 udelay(2);
181 outw(bits, io); /* LO level */
182 udelay(4);
183 }
184
185 if(!dev->muted)
186 outw(0, io);
187
188 udelay(4);
189 outw(omask, io + IO_MASK);
190 outw(odir, io + IO_DIR);
191 msleep(125);
192 }
193
194 static inline int radio_function(struct inode *inode, struct file *file,
195 unsigned int cmd, void *arg)
196 {
197 struct video_device *dev = video_devdata(file);
198 struct radio_device *card = video_get_drvdata(dev);
199
200 switch (cmd) {
201 case VIDIOC_QUERYCAP:
202 {
203 struct v4l2_capability *v = arg;
204 memset(v,0,sizeof(*v));
205 strlcpy(v->driver, "radio-maestro", sizeof (v->driver));
206 strlcpy(v->card, "Maestro Radio", sizeof (v->card));
207 sprintf(v->bus_info,"PCI");
208 v->version = RADIO_VERSION;
209 v->capabilities = V4L2_CAP_TUNER;
210
211 return 0;
212 }
213 case VIDIOC_G_TUNER:
214 {
215 struct v4l2_tuner *v = arg;
216
217 if (v->index > 0)
218 return -EINVAL;
219
220 (void)radio_bits_get(card);
221
222 memset(v,0,sizeof(*v));
223 strcpy(v->name, "FM");
224 v->type = V4L2_TUNER_RADIO;
225
226 v->rangelow = FREQ_LO;
227 v->rangehigh = FREQ_HI;
228 v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
229 v->capability=V4L2_TUNER_CAP_LOW;
230 if(card->stereo)
231 v->audmode = V4L2_TUNER_MODE_STEREO;
232 else
233 v->audmode = V4L2_TUNER_MODE_MONO;
234 v->signal=card->tuned;
235
236 return 0;
237 }
238 case VIDIOC_S_TUNER:
239 {
240 struct v4l2_tuner *v = arg;
241
242 if (v->index > 0)
243 return -EINVAL;
244
245 return 0;
246 }
247 case VIDIOC_S_FREQUENCY:
248 {
249 struct v4l2_frequency *f = arg;
250
251 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
252 return -EINVAL;
253 radio_bits_set(card, FREQ2BITS(f->frequency));
254
255 return 0;
256 }
257 case VIDIOC_G_FREQUENCY:
258 {
259 struct v4l2_frequency *f = arg;
260
261 f->type = V4L2_TUNER_RADIO;
262 f->frequency = BITS2FREQ(radio_bits_get(card));
263
264 return 0;
265 }
266 case VIDIOC_QUERYCTRL:
267 {
268 struct v4l2_queryctrl *qc = arg;
269 int i;
270
271 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
272 if (qc->id && qc->id == radio_qctrl[i].id) {
273 memcpy(qc, &(radio_qctrl[i]),
274 sizeof(*qc));
275 return (0);
276 }
277 }
278 return -EINVAL;
279 }
280 case VIDIOC_G_CTRL:
281 {
282 struct v4l2_control *ctrl= arg;
283
284 switch (ctrl->id) {
285 case V4L2_CID_AUDIO_MUTE:
286 ctrl->value=card->muted;
287 return (0);
288 }
289 return -EINVAL;
290 }
291 case VIDIOC_S_CTRL:
292 {
293 struct v4l2_control *ctrl= arg;
294
295 switch (ctrl->id) {
296 case V4L2_CID_AUDIO_MUTE:
297 {
298 register u16 io = card->io;
299 register u16 omask = inw(io + IO_MASK);
300 outw(~STR_WREN, io + IO_MASK);
301 outw((card->muted = ctrl->value ) ?
302 STR_WREN : 0, io);
303 udelay(4);
304 outw(omask, io + IO_MASK);
305 msleep(125);
306
307 return (0);
308 }
309 }
310 return -EINVAL;
311 }
312 default:
313 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
314 radio_function);
315 }
316 }
317
318 static int radio_ioctl(struct inode *inode, struct file *file,
319 unsigned int cmd, unsigned long arg)
320 {
321 struct video_device *dev = video_devdata(file);
322 struct radio_device *card = video_get_drvdata(dev);
323 int ret;
324
325 mutex_lock(&card->lock);
326 ret = video_usercopy(inode, file, cmd, arg, radio_function);
327 mutex_unlock(&card->lock);
328
329 return ret;
330 }
331
332 static u16 __devinit radio_power_on(struct radio_device *dev)
333 {
334 register u16 io = dev->io;
335 register u32 ofreq;
336 u16 omask, odir;
337
338 omask = inw(io + IO_MASK);
339 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
340 outw(odir & ~STR_WREN, io + IO_DIR);
341 dev->muted = inw(io) & STR_WREN ? 0 : 1;
342 outw(odir, io + IO_DIR);
343 outw(~(STR_WREN | STR_CLK), io + IO_MASK);
344 outw(dev->muted ? 0 : STR_WREN, io);
345 udelay(16);
346 outw(omask, io + IO_MASK);
347 ofreq = radio_bits_get(dev);
348
349 if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
350 ofreq = FREQ2BITS(FREQ_LO);
351 radio_bits_set(dev, ofreq);
352
353 return (ofreq == radio_bits_get(dev));
354 }
355
356 static int __devinit maestro_probe(struct pci_dev *pdev,
357 const struct pci_device_id *ent)
358 {
359 struct radio_device *radio_unit;
360 struct video_device *maestro_radio_inst;
361 int retval;
362
363 retval = pci_enable_device(pdev);
364 if (retval) {
365 dev_err(&pdev->dev, "enabling pci device failed!\n");
366 goto err;
367 }
368
369 retval = -ENOMEM;
370
371 radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
372 if (radio_unit == NULL) {
373 dev_err(&pdev->dev, "not enough memory\n");
374 goto err;
375 }
376
377 radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
378 mutex_init(&radio_unit->lock);
379
380 maestro_radio_inst = video_device_alloc();
381 if (maestro_radio_inst == NULL) {
382 dev_err(&pdev->dev, "not enough memory\n");
383 goto errfr;
384 }
385
386 memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
387 video_set_drvdata(maestro_radio_inst, radio_unit);
388 pci_set_drvdata(pdev, maestro_radio_inst);
389
390 retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO,
391 radio_nr);
392 if (retval) {
393 printk(KERN_ERR "can't register video device!\n");
394 goto errfr1;
395 }
396
397 if (!radio_power_on(radio_unit)) {
398 retval = -EIO;
399 goto errunr;
400 }
401
402 dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " "
403 __DATE__ "\n");
404 dev_info(&pdev->dev, "radio chip initialized\n");
405
406 return 0;
407 errunr:
408 video_unregister_device(maestro_radio_inst);
409 errfr1:
410 kfree(maestro_radio_inst);
411 errfr:
412 kfree(radio_unit);
413 err:
414 return retval;
415
416 }
417
418 static void __devexit maestro_remove(struct pci_dev *pdev)
419 {
420 struct video_device *vdev = pci_get_drvdata(pdev);
421
422 video_unregister_device(vdev);
423 }
424
425 static int __init maestro_radio_init(void)
426 {
427 int retval = pci_register_driver(&maestro_r_driver);
428
429 if (retval)
430 printk(KERN_ERR "error during registration pci driver\n");
431
432 return retval;
433 }
434
435 static void __exit maestro_radio_exit(void)
436 {
437 pci_unregister_driver(&maestro_r_driver);
438 }
439
440 module_init(maestro_radio_init);
441 module_exit(maestro_radio_exit);
442
443 MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
444 MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
445 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)