?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
AT91: Added a generic way to setup AT91 serial ports in Kconfig
[linux-2.6/pdupreez.git] / drivers / media / radio / radio-maestro.c
blob9ef0a763eeb72a54570324a7b3112a549cdfdcb6
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 int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
79 static void maestro_remove(struct pci_dev *pdev);
80
81 static struct pci_device_id maestro_r_pci_tbl[] = {
82 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
83 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
84 .class_mask = 0xffff00 },
85 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
86 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
87 .class_mask = 0xffff00 },
88 { 0 }
89 };
90 MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
91
92 static struct pci_driver maestro_r_driver = {
93 .name = "maestro_radio",
94 .id_table = maestro_r_pci_tbl,
95 .probe = maestro_probe,
96 .remove = __devexit_p(maestro_remove),
97 };
98
99 static const struct file_operations maestro_fops = {
100 .owner = THIS_MODULE,
101 .open = video_exclusive_open,
102 .release = video_exclusive_release,
103 .ioctl = video_ioctl2,
104 #ifdef CONFIG_COMPAT
105 .compat_ioctl = v4l_compat_ioctl32,
106 #endif
107 .llseek = no_llseek,
108 };
109
110 struct radio_device {
111 u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
112 muted, /* VIDEO_AUDIO_MUTE */
113 stereo, /* VIDEO_TUNER_STEREO_ON */
114 tuned; /* signal strength (0 or 0xffff) */
115 };
116
117 static u32 radio_bits_get(struct radio_device *dev)
118 {
119 register u16 io=dev->io, l, rdata;
120 register u32 data=0;
121 u16 omask;
122
123 omask = inw(io + IO_MASK);
124 outw(~(STR_CLK | STR_WREN), io + IO_MASK);
125 outw(0, io);
126 udelay(16);
127
128 for (l=24;l--;) {
129 outw(STR_CLK, io); /* HI state */
130 udelay(2);
131 if(!l)
132 dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
133 outw(0, io); /* LO state */
134 udelay(2);
135 data <<= 1; /* shift data */
136 rdata = inw(io);
137 if(!l)
138 dev->stereo = rdata & STR_MOST ?
139 0 : 1;
140 else
141 if(rdata & STR_DATA)
142 data++;
143 udelay(2);
144 }
145
146 if(dev->muted)
147 outw(STR_WREN, io);
148
149 udelay(4);
150 outw(omask, io + IO_MASK);
151
152 return data & 0x3ffe;
153 }
154
155 static void radio_bits_set(struct radio_device *dev, u32 data)
156 {
157 register u16 io=dev->io, l, bits;
158 u16 omask, odir;
159
160 omask = inw(io + IO_MASK);
161 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
162 outw(odir | STR_DATA, io + IO_DIR);
163 outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
164 udelay(16);
165 for (l=25;l;l--) {
166 bits = ((data >> 18) & STR_DATA) | STR_WREN ;
167 data <<= 1; /* shift data */
168 outw(bits, io); /* start strobe */
169 udelay(2);
170 outw(bits | STR_CLK, io); /* HI level */
171 udelay(2);
172 outw(bits, io); /* LO level */
173 udelay(4);
174 }
175
176 if(!dev->muted)
177 outw(0, io);
178
179 udelay(4);
180 outw(omask, io + IO_MASK);
181 outw(odir, io + IO_DIR);
182 msleep(125);
183 }
184
185 static int vidioc_querycap(struct file *file, void *priv,
186 struct v4l2_capability *v)
187 {
188 strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
189 strlcpy(v->card, "Maestro Radio", sizeof(v->card));
190 sprintf(v->bus_info, "PCI");
191 v->version = RADIO_VERSION;
192 v->capabilities = V4L2_CAP_TUNER;
193 return 0;
194 }
195
196 static int vidioc_g_tuner(struct file *file, void *priv,
197 struct v4l2_tuner *v)
198 {
199 struct video_device *dev = video_devdata(file);
200 struct radio_device *card = video_get_drvdata(dev);
201
202 if (v->index > 0)
203 return -EINVAL;
204
205 (void)radio_bits_get(card);
206
207 strcpy(v->name, "FM");
208 v->type = V4L2_TUNER_RADIO;
209 v->rangelow = FREQ_LO;
210 v->rangehigh = FREQ_HI;
211 v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
212 v->capability = V4L2_TUNER_CAP_LOW;
213 if(card->stereo)
214 v->audmode = V4L2_TUNER_MODE_STEREO;
215 else
216 v->audmode = V4L2_TUNER_MODE_MONO;
217 v->signal = card->tuned;
218 return 0;
219 }
220
221 static int vidioc_s_tuner(struct file *file, void *priv,
222 struct v4l2_tuner *v)
223 {
224 if (v->index > 0)
225 return -EINVAL;
226 return 0;
227 }
228
229 static int vidioc_s_frequency(struct file *file, void *priv,
230 struct v4l2_frequency *f)
231 {
232 struct video_device *dev = video_devdata(file);
233 struct radio_device *card = video_get_drvdata(dev);
234
235 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
236 return -EINVAL;
237 radio_bits_set(card, FREQ2BITS(f->frequency));
238 return 0;
239 }
240
241 static int vidioc_g_frequency(struct file *file, void *priv,
242 struct v4l2_frequency *f)
243 {
244 struct video_device *dev = video_devdata(file);
245 struct radio_device *card = video_get_drvdata(dev);
246
247 f->type = V4L2_TUNER_RADIO;
248 f->frequency = BITS2FREQ(radio_bits_get(card));
249 return 0;
250 }
251
252 static int vidioc_queryctrl(struct file *file, void *priv,
253 struct v4l2_queryctrl *qc)
254 {
255 int i;
256
257 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
258 if (qc->id && qc->id == radio_qctrl[i].id) {
259 memcpy(qc, &(radio_qctrl[i]),
260 sizeof(*qc));
261 return 0;
262 }
263 }
264 return -EINVAL;
265 }
266
267 static int vidioc_g_ctrl(struct file *file, void *priv,
268 struct v4l2_control *ctrl)
269 {
270 struct video_device *dev = video_devdata(file);
271 struct radio_device *card = video_get_drvdata(dev);
272
273 switch (ctrl->id) {
274 case V4L2_CID_AUDIO_MUTE:
275 ctrl->value = card->muted;
276 return 0;
277 }
278 return -EINVAL;
279 }
280
281 static int vidioc_s_ctrl(struct file *file, void *priv,
282 struct v4l2_control *ctrl)
283 {
284 struct video_device *dev = video_devdata(file);
285 struct radio_device *card = video_get_drvdata(dev);
286 register u16 io = card->io;
287 register u16 omask = inw(io + IO_MASK);
288
289 switch (ctrl->id) {
290 case V4L2_CID_AUDIO_MUTE:
291 outw(~STR_WREN, io + IO_MASK);
292 outw((card->muted = ctrl->value ) ?
293 STR_WREN : 0, io);
294 udelay(4);
295 outw(omask, io + IO_MASK);
296 msleep(125);
297 return 0;
298 }
299 return -EINVAL;
300 }
301
302 static int vidioc_g_audio(struct file *file, void *priv,
303 struct v4l2_audio *a)
304 {
305 if (a->index > 1)
306 return -EINVAL;
307
308 strcpy(a->name, "Radio");
309 a->capability = V4L2_AUDCAP_STEREO;
310 return 0;
311 }
312
313 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
314 {
315 *i = 0;
316 return 0;
317 }
318
319 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
320 {
321 if (i != 0)
322 return -EINVAL;
323 return 0;
324 }
325
326 static int vidioc_s_audio(struct file *file, void *priv,
327 struct v4l2_audio *a)
328 {
329 if (a->index != 0)
330 return -EINVAL;
331 return 0;
332 }
333
334 static u16 __devinit radio_power_on(struct radio_device *dev)
335 {
336 register u16 io = dev->io;
337 register u32 ofreq;
338 u16 omask, odir;
339
340 omask = inw(io + IO_MASK);
341 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
342 outw(odir & ~STR_WREN, io + IO_DIR);
343 dev->muted = inw(io) & STR_WREN ? 0 : 1;
344 outw(odir, io + IO_DIR);
345 outw(~(STR_WREN | STR_CLK), io + IO_MASK);
346 outw(dev->muted ? 0 : STR_WREN, io);
347 udelay(16);
348 outw(omask, io + IO_MASK);
349 ofreq = radio_bits_get(dev);
350
351 if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
352 ofreq = FREQ2BITS(FREQ_LO);
353 radio_bits_set(dev, ofreq);
354
355 return (ofreq == radio_bits_get(dev));
356 }
357
358 static const struct v4l2_ioctl_ops maestro_ioctl_ops = {
359 .vidioc_querycap = vidioc_querycap,
360 .vidioc_g_tuner = vidioc_g_tuner,
361 .vidioc_s_tuner = vidioc_s_tuner,
362 .vidioc_g_audio = vidioc_g_audio,
363 .vidioc_s_audio = vidioc_s_audio,
364 .vidioc_g_input = vidioc_g_input,
365 .vidioc_s_input = vidioc_s_input,
366 .vidioc_g_frequency = vidioc_g_frequency,
367 .vidioc_s_frequency = vidioc_s_frequency,
368 .vidioc_queryctrl = vidioc_queryctrl,
369 .vidioc_g_ctrl = vidioc_g_ctrl,
370 .vidioc_s_ctrl = vidioc_s_ctrl,
371 };
372
373 static struct video_device maestro_radio = {
374 .name = "Maestro radio",
375 .fops = &maestro_fops,
376 .ioctl_ops = &maestro_ioctl_ops,
377 };
378
379 static int __devinit maestro_probe(struct pci_dev *pdev,
380 const struct pci_device_id *ent)
381 {
382 struct radio_device *radio_unit;
383 struct video_device *maestro_radio_inst;
384 int retval;
385
386 retval = pci_enable_device(pdev);
387 if (retval) {
388 dev_err(&pdev->dev, "enabling pci device failed!\n");
389 goto err;
390 }
391
392 retval = -ENOMEM;
393
394 radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
395 if (radio_unit == NULL) {
396 dev_err(&pdev->dev, "not enough memory\n");
397 goto err;
398 }
399
400 radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
401
402 maestro_radio_inst = video_device_alloc();
403 if (maestro_radio_inst == NULL) {
404 dev_err(&pdev->dev, "not enough memory\n");
405 goto errfr;
406 }
407
408 memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
409 video_set_drvdata(maestro_radio_inst, radio_unit);
410 pci_set_drvdata(pdev, maestro_radio_inst);
411
412 retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO, radio_nr);
413 if (retval) {
414 printk(KERN_ERR "can't register video device!\n");
415 goto errfr1;
416 }
417
418 if (!radio_power_on(radio_unit)) {
419 retval = -EIO;
420 goto errunr;
421 }
422
423 dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " "
424 __DATE__ "\n");
425 dev_info(&pdev->dev, "radio chip initialized\n");
426
427 return 0;
428 errunr:
429 video_unregister_device(maestro_radio_inst);
430 errfr1:
431 video_device_release(maestro_radio_inst);
432 errfr:
433 kfree(radio_unit);
434 err:
435 return retval;
436
437 }
438
439 static void __devexit maestro_remove(struct pci_dev *pdev)
440 {
441 struct video_device *vdev = pci_get_drvdata(pdev);
442
443 video_unregister_device(vdev);
444 }
445
446 static int __init maestro_radio_init(void)
447 {
448 int retval = pci_register_driver(&maestro_r_driver);
449
450 if (retval)
451 printk(KERN_ERR "error during registration pci driver\n");
452
453 return retval;
454 }
455
456 static void __exit maestro_radio_exit(void)
457 {
458 pci_unregister_driver(&maestro_r_driver);
459 }
460
461 module_init(maestro_radio_init);
462 module_exit(maestro_radio_exit);
463
464 MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
465 MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
466 MODULE_LICENSE("GPL");
Linux branches of Pieter du Preez