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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / drivers / media / radio / radio-maestro.c
blobba3a13a90013e4c58e232afe7b50baff892410a8
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 <asm/io.h>
26 #include <asm/uaccess.h>
27 #include <linux/pci.h>
28 #include <linux/videodev2.h>
29 #include <media/v4l2-common.h>
30 #include <media/v4l2-ioctl.h>
31
32 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
33 #define RADIO_VERSION KERNEL_VERSION(0,0,6)
34 #define DRIVER_VERSION "0.06"
35
36 static struct v4l2_queryctrl radio_qctrl[] = {
37 {
38 .id = V4L2_CID_AUDIO_MUTE,
39 .name = "Mute",
40 .minimum = 0,
41 .maximum = 1,
42 .default_value = 1,
43 .type = V4L2_CTRL_TYPE_BOOLEAN,
44 }
45 };
46
47 #define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
48
49 #define IO_MASK 4 /* mask register offset from GPIO_DATA
50 bits 1=unmask write to given bit */
51 #define IO_DIR 8 /* direction register offset from GPIO_DATA
52 bits 0/1=read/write direction */
53
54 #define GPIO6 0x0040 /* mask bits for GPIO lines */
55 #define GPIO7 0x0080
56 #define GPIO8 0x0100
57 #define GPIO9 0x0200
58
59 #define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
60 #define STR_CLK GPIO7
61 #define STR_WREN GPIO8
62 #define STR_MOST GPIO9
63
64 #define FREQ_LO 50*16000
65 #define FREQ_HI 150*16000
66
67 #define FREQ_IF 171200 /* 10.7*16000 */
68 #define FREQ_STEP 200 /* 12.5*16 */
69
70 #define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
71 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
72
73 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
74
75 static int radio_nr = -1;
76 module_param(radio_nr, int, 0);
77
78 static unsigned long in_use;
79
80 static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
81
82 static int maestro_exclusive_open(struct file *file)
83 {
84 return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
85 }
86
87 static int maestro_exclusive_release(struct file *file)
88 {
89 clear_bit(0, &in_use);
90 return 0;
91 }
92
93 static void maestro_remove(struct pci_dev *pdev);
94
95 static struct pci_device_id maestro_r_pci_tbl[] = {
96 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
97 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
98 .class_mask = 0xffff00 },
99 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
100 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
101 .class_mask = 0xffff00 },
102 { 0 }
103 };
104 MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
105
106 static struct pci_driver maestro_r_driver = {
107 .name = "maestro_radio",
108 .id_table = maestro_r_pci_tbl,
109 .probe = maestro_probe,
110 .remove = __devexit_p(maestro_remove),
111 };
112
113 static const struct v4l2_file_operations maestro_fops = {
114 .owner = THIS_MODULE,
115 .open = maestro_exclusive_open,
116 .release = maestro_exclusive_release,
117 .ioctl = video_ioctl2,
118 };
119
120 struct radio_device {
121 u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
122 muted, /* VIDEO_AUDIO_MUTE */
123 stereo, /* VIDEO_TUNER_STEREO_ON */
124 tuned; /* signal strength (0 or 0xffff) */
125 };
126
127 static u32 radio_bits_get(struct radio_device *dev)
128 {
129 register u16 io=dev->io, l, rdata;
130 register u32 data=0;
131 u16 omask;
132
133 omask = inw(io + IO_MASK);
134 outw(~(STR_CLK | STR_WREN), io + IO_MASK);
135 outw(0, io);
136 udelay(16);
137
138 for (l=24;l--;) {
139 outw(STR_CLK, io); /* HI state */
140 udelay(2);
141 if(!l)
142 dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
143 outw(0, io); /* LO state */
144 udelay(2);
145 data <<= 1; /* shift data */
146 rdata = inw(io);
147 if(!l)
148 dev->stereo = rdata & STR_MOST ?
149 0 : 1;
150 else
151 if(rdata & STR_DATA)
152 data++;
153 udelay(2);
154 }
155
156 if(dev->muted)
157 outw(STR_WREN, io);
158
159 udelay(4);
160 outw(omask, io + IO_MASK);
161
162 return data & 0x3ffe;
163 }
164
165 static void radio_bits_set(struct radio_device *dev, u32 data)
166 {
167 register u16 io=dev->io, l, bits;
168 u16 omask, odir;
169
170 omask = inw(io + IO_MASK);
171 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
172 outw(odir | STR_DATA, io + IO_DIR);
173 outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
174 udelay(16);
175 for (l=25;l;l--) {
176 bits = ((data >> 18) & STR_DATA) | STR_WREN ;
177 data <<= 1; /* shift data */
178 outw(bits, io); /* start strobe */
179 udelay(2);
180 outw(bits | STR_CLK, io); /* HI level */
181 udelay(2);
182 outw(bits, io); /* LO level */
183 udelay(4);
184 }
185
186 if(!dev->muted)
187 outw(0, io);
188
189 udelay(4);
190 outw(omask, io + IO_MASK);
191 outw(odir, io + IO_DIR);
192 msleep(125);
193 }
194
195 static int vidioc_querycap(struct file *file, void *priv,
196 struct v4l2_capability *v)
197 {
198 strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
199 strlcpy(v->card, "Maestro Radio", sizeof(v->card));
200 sprintf(v->bus_info, "PCI");
201 v->version = RADIO_VERSION;
202 v->capabilities = V4L2_CAP_TUNER;
203 return 0;
204 }
205
206 static int vidioc_g_tuner(struct file *file, void *priv,
207 struct v4l2_tuner *v)
208 {
209 struct radio_device *card = video_drvdata(file);
210
211 if (v->index > 0)
212 return -EINVAL;
213
214 (void)radio_bits_get(card);
215
216 strcpy(v->name, "FM");
217 v->type = V4L2_TUNER_RADIO;
218 v->rangelow = FREQ_LO;
219 v->rangehigh = FREQ_HI;
220 v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
221 v->capability = V4L2_TUNER_CAP_LOW;
222 if(card->stereo)
223 v->audmode = V4L2_TUNER_MODE_STEREO;
224 else
225 v->audmode = V4L2_TUNER_MODE_MONO;
226 v->signal = card->tuned;
227 return 0;
228 }
229
230 static int vidioc_s_tuner(struct file *file, void *priv,
231 struct v4l2_tuner *v)
232 {
233 if (v->index > 0)
234 return -EINVAL;
235 return 0;
236 }
237
238 static int vidioc_s_frequency(struct file *file, void *priv,
239 struct v4l2_frequency *f)
240 {
241 struct radio_device *card = video_drvdata(file);
242
243 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
244 return -EINVAL;
245 radio_bits_set(card, FREQ2BITS(f->frequency));
246 return 0;
247 }
248
249 static int vidioc_g_frequency(struct file *file, void *priv,
250 struct v4l2_frequency *f)
251 {
252 struct radio_device *card = video_drvdata(file);
253
254 f->type = V4L2_TUNER_RADIO;
255 f->frequency = BITS2FREQ(radio_bits_get(card));
256 return 0;
257 }
258
259 static int vidioc_queryctrl(struct file *file, void *priv,
260 struct v4l2_queryctrl *qc)
261 {
262 int i;
263
264 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
265 if (qc->id && qc->id == radio_qctrl[i].id) {
266 memcpy(qc, &(radio_qctrl[i]),
267 sizeof(*qc));
268 return 0;
269 }
270 }
271 return -EINVAL;
272 }
273
274 static int vidioc_g_ctrl(struct file *file, void *priv,
275 struct v4l2_control *ctrl)
276 {
277 struct radio_device *card = video_drvdata(file);
278
279 switch (ctrl->id) {
280 case V4L2_CID_AUDIO_MUTE:
281 ctrl->value = card->muted;
282 return 0;
283 }
284 return -EINVAL;
285 }
286
287 static int vidioc_s_ctrl(struct file *file, void *priv,
288 struct v4l2_control *ctrl)
289 {
290 struct radio_device *card = video_drvdata(file);
291 register u16 io = card->io;
292 register u16 omask = inw(io + IO_MASK);
293
294 switch (ctrl->id) {
295 case V4L2_CID_AUDIO_MUTE:
296 outw(~STR_WREN, io + IO_MASK);
297 outw((card->muted = ctrl->value ) ?
298 STR_WREN : 0, io);
299 udelay(4);
300 outw(omask, io + IO_MASK);
301 msleep(125);
302 return 0;
303 }
304 return -EINVAL;
305 }
306
307 static int vidioc_g_audio(struct file *file, void *priv,
308 struct v4l2_audio *a)
309 {
310 if (a->index > 1)
311 return -EINVAL;
312
313 strcpy(a->name, "Radio");
314 a->capability = V4L2_AUDCAP_STEREO;
315 return 0;
316 }
317
318 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
319 {
320 *i = 0;
321 return 0;
322 }
323
324 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
325 {
326 if (i != 0)
327 return -EINVAL;
328 return 0;
329 }
330
331 static int vidioc_s_audio(struct file *file, void *priv,
332 struct v4l2_audio *a)
333 {
334 if (a->index != 0)
335 return -EINVAL;
336 return 0;
337 }
338
339 static u16 __devinit radio_power_on(struct radio_device *dev)
340 {
341 register u16 io = dev->io;
342 register u32 ofreq;
343 u16 omask, odir;
344
345 omask = inw(io + IO_MASK);
346 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
347 outw(odir & ~STR_WREN, io + IO_DIR);
348 dev->muted = inw(io) & STR_WREN ? 0 : 1;
349 outw(odir, io + IO_DIR);
350 outw(~(STR_WREN | STR_CLK), io + IO_MASK);
351 outw(dev->muted ? 0 : STR_WREN, io);
352 udelay(16);
353 outw(omask, io + IO_MASK);
354 ofreq = radio_bits_get(dev);
355
356 if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
357 ofreq = FREQ2BITS(FREQ_LO);
358 radio_bits_set(dev, ofreq);
359
360 return (ofreq == radio_bits_get(dev));
361 }
362
363 static const struct v4l2_ioctl_ops maestro_ioctl_ops = {
364 .vidioc_querycap = vidioc_querycap,
365 .vidioc_g_tuner = vidioc_g_tuner,
366 .vidioc_s_tuner = vidioc_s_tuner,
367 .vidioc_g_audio = vidioc_g_audio,
368 .vidioc_s_audio = vidioc_s_audio,
369 .vidioc_g_input = vidioc_g_input,
370 .vidioc_s_input = vidioc_s_input,
371 .vidioc_g_frequency = vidioc_g_frequency,
372 .vidioc_s_frequency = vidioc_s_frequency,
373 .vidioc_queryctrl = vidioc_queryctrl,
374 .vidioc_g_ctrl = vidioc_g_ctrl,
375 .vidioc_s_ctrl = vidioc_s_ctrl,
376 };
377
378 static struct video_device maestro_radio = {
379 .name = "Maestro radio",
380 .fops = &maestro_fops,
381 .ioctl_ops = &maestro_ioctl_ops,
382 .release = video_device_release,
383 };
384
385 static int __devinit maestro_probe(struct pci_dev *pdev,
386 const struct pci_device_id *ent)
387 {
388 struct radio_device *radio_unit;
389 struct video_device *maestro_radio_inst;
390 int retval;
391
392 retval = pci_enable_device(pdev);
393 if (retval) {
394 dev_err(&pdev->dev, "enabling pci device failed!\n");
395 goto err;
396 }
397
398 retval = -ENOMEM;
399
400 radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
401 if (radio_unit == NULL) {
402 dev_err(&pdev->dev, "not enough memory\n");
403 goto err;
404 }
405
406 radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
407
408 maestro_radio_inst = video_device_alloc();
409 if (maestro_radio_inst == NULL) {
410 dev_err(&pdev->dev, "not enough memory\n");
411 goto errfr;
412 }
413
414 memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
415 video_set_drvdata(maestro_radio_inst, radio_unit);
416 pci_set_drvdata(pdev, maestro_radio_inst);
417
418 retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO, radio_nr);
419 if (retval) {
420 printk(KERN_ERR "can't register video device!\n");
421 goto errfr1;
422 }
423
424 if (!radio_power_on(radio_unit)) {
425 retval = -EIO;
426 goto errunr;
427 }
428
429 dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " "
430 __DATE__ "\n");
431 dev_info(&pdev->dev, "radio chip initialized\n");
432
433 return 0;
434 errunr:
435 video_unregister_device(maestro_radio_inst);
436 errfr1:
437 video_device_release(maestro_radio_inst);
438 errfr:
439 kfree(radio_unit);
440 err:
441 return retval;
442
443 }
444
445 static void __devexit maestro_remove(struct pci_dev *pdev)
446 {
447 struct video_device *vdev = pci_get_drvdata(pdev);
448
449 video_unregister_device(vdev);
450 }
451
452 static int __init maestro_radio_init(void)
453 {
454 int retval = pci_register_driver(&maestro_r_driver);
455
456 if (retval)
457 printk(KERN_ERR "error during registration pci driver\n");
458
459 return retval;
460 }
461
462 static void __exit maestro_radio_exit(void)
463 {
464 pci_unregister_driver(&maestro_r_driver);
465 }
466
467 module_init(maestro_radio_init);
468 module_exit(maestro_radio_exit);
469
470 MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
471 MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
472 MODULE_LICENSE("GPL");
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