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various bugfixes
[cor_2_6_31.git] / drivers / media / radio / radio-maestro.c
blob64d737c35acf18de14d9cc625ba7982ae3f3d641
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/version.h> /* for KERNEL_VERSION MACRO */
26 #include <linux/pci.h>
27 #include <linux/videodev2.h>
28 #include <linux/io.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-ioctl.h>
31
32 MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
33 MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
34 MODULE_LICENSE("GPL");
35
36 static int radio_nr = -1;
37 module_param(radio_nr, int, 0);
38
39 #define RADIO_VERSION KERNEL_VERSION(0, 0, 6)
40 #define DRIVER_VERSION "0.06"
41
42 #define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
43
44 #define IO_MASK 4 /* mask register offset from GPIO_DATA
45 bits 1=unmask write to given bit */
46 #define IO_DIR 8 /* direction register offset from GPIO_DATA
47 bits 0/1=read/write direction */
48
49 #define GPIO6 0x0040 /* mask bits for GPIO lines */
50 #define GPIO7 0x0080
51 #define GPIO8 0x0100
52 #define GPIO9 0x0200
53
54 #define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
55 #define STR_CLK GPIO7
56 #define STR_WREN GPIO8
57 #define STR_MOST GPIO9
58
59 #define FREQ_LO 50*16000
60 #define FREQ_HI 150*16000
61
62 #define FREQ_IF 171200 /* 10.7*16000 */
63 #define FREQ_STEP 200 /* 12.5*16 */
64
65 #define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
66 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
67
68 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
69
70 struct maestro {
71 struct v4l2_device v4l2_dev;
72 struct video_device vdev;
73 struct pci_dev *pdev;
74 struct mutex lock;
75
76 u16 io; /* base of Maestro card radio io (GPIO_DATA)*/
77 u16 muted; /* VIDEO_AUDIO_MUTE */
78 u16 stereo; /* VIDEO_TUNER_STEREO_ON */
79 u16 tuned; /* signal strength (0 or 0xffff) */
80 };
81
82 static inline struct maestro *to_maestro(struct v4l2_device *v4l2_dev)
83 {
84 return container_of(v4l2_dev, struct maestro, v4l2_dev);
85 }
86
87 static u32 radio_bits_get(struct maestro *dev)
88 {
89 u16 io = dev->io, l, rdata;
90 u32 data = 0;
91 u16 omask;
92
93 omask = inw(io + IO_MASK);
94 outw(~(STR_CLK | STR_WREN), io + IO_MASK);
95 outw(0, io);
96 udelay(16);
97
98 for (l = 24; l--;) {
99 outw(STR_CLK, io); /* HI state */
100 udelay(2);
101 if (!l)
102 dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
103 outw(0, io); /* LO state */
104 udelay(2);
105 data <<= 1; /* shift data */
106 rdata = inw(io);
107 if (!l)
108 dev->stereo = (rdata & STR_MOST) ? 0 : 1;
109 else if (rdata & STR_DATA)
110 data++;
111 udelay(2);
112 }
113
114 if (dev->muted)
115 outw(STR_WREN, io);
116
117 udelay(4);
118 outw(omask, io + IO_MASK);
119
120 return data & 0x3ffe;
121 }
122
123 static void radio_bits_set(struct maestro *dev, u32 data)
124 {
125 u16 io = dev->io, l, bits;
126 u16 omask, odir;
127
128 omask = inw(io + IO_MASK);
129 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
130 outw(odir | STR_DATA, io + IO_DIR);
131 outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
132 udelay(16);
133 for (l = 25; l; l--) {
134 bits = ((data >> 18) & STR_DATA) | STR_WREN;
135 data <<= 1; /* shift data */
136 outw(bits, io); /* start strobe */
137 udelay(2);
138 outw(bits | STR_CLK, io); /* HI level */
139 udelay(2);
140 outw(bits, io); /* LO level */
141 udelay(4);
142 }
143
144 if (!dev->muted)
145 outw(0, io);
146
147 udelay(4);
148 outw(omask, io + IO_MASK);
149 outw(odir, io + IO_DIR);
150 msleep(125);
151 }
152
153 static int vidioc_querycap(struct file *file, void *priv,
154 struct v4l2_capability *v)
155 {
156 struct maestro *dev = video_drvdata(file);
157
158 strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
159 strlcpy(v->card, "Maestro Radio", sizeof(v->card));
160 snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
161 v->version = RADIO_VERSION;
162 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
163 return 0;
164 }
165
166 static int vidioc_g_tuner(struct file *file, void *priv,
167 struct v4l2_tuner *v)
168 {
169 struct maestro *dev = video_drvdata(file);
170
171 if (v->index > 0)
172 return -EINVAL;
173
174 mutex_lock(&dev->lock);
175 radio_bits_get(dev);
176
177 strlcpy(v->name, "FM", sizeof(v->name));
178 v->type = V4L2_TUNER_RADIO;
179 v->rangelow = FREQ_LO;
180 v->rangehigh = FREQ_HI;
181 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
182 v->capability = V4L2_TUNER_CAP_LOW;
183 if (dev->stereo)
184 v->audmode = V4L2_TUNER_MODE_STEREO;
185 else
186 v->audmode = V4L2_TUNER_MODE_MONO;
187 v->signal = dev->tuned;
188 mutex_unlock(&dev->lock);
189 return 0;
190 }
191
192 static int vidioc_s_tuner(struct file *file, void *priv,
193 struct v4l2_tuner *v)
194 {
195 return v->index ? -EINVAL : 0;
196 }
197
198 static int vidioc_s_frequency(struct file *file, void *priv,
199 struct v4l2_frequency *f)
200 {
201 struct maestro *dev = video_drvdata(file);
202
203 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
204 return -EINVAL;
205 mutex_lock(&dev->lock);
206 radio_bits_set(dev, FREQ2BITS(f->frequency));
207 mutex_unlock(&dev->lock);
208 return 0;
209 }
210
211 static int vidioc_g_frequency(struct file *file, void *priv,
212 struct v4l2_frequency *f)
213 {
214 struct maestro *dev = video_drvdata(file);
215
216 f->type = V4L2_TUNER_RADIO;
217 mutex_lock(&dev->lock);
218 f->frequency = BITS2FREQ(radio_bits_get(dev));
219 mutex_unlock(&dev->lock);
220 return 0;
221 }
222
223 static int vidioc_queryctrl(struct file *file, void *priv,
224 struct v4l2_queryctrl *qc)
225 {
226 switch (qc->id) {
227 case V4L2_CID_AUDIO_MUTE:
228 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
229 }
230 return -EINVAL;
231 }
232
233 static int vidioc_g_ctrl(struct file *file, void *priv,
234 struct v4l2_control *ctrl)
235 {
236 struct maestro *dev = video_drvdata(file);
237
238 switch (ctrl->id) {
239 case V4L2_CID_AUDIO_MUTE:
240 ctrl->value = dev->muted;
241 return 0;
242 }
243 return -EINVAL;
244 }
245
246 static int vidioc_s_ctrl(struct file *file, void *priv,
247 struct v4l2_control *ctrl)
248 {
249 struct maestro *dev = video_drvdata(file);
250 u16 io = dev->io;
251 u16 omask;
252
253 switch (ctrl->id) {
254 case V4L2_CID_AUDIO_MUTE:
255 mutex_lock(&dev->lock);
256 omask = inw(io + IO_MASK);
257 outw(~STR_WREN, io + IO_MASK);
258 dev->muted = ctrl->value;
259 outw(dev->muted ? STR_WREN : 0, io);
260 udelay(4);
261 outw(omask, io + IO_MASK);
262 msleep(125);
263 mutex_unlock(&dev->lock);
264 return 0;
265 }
266 return -EINVAL;
267 }
268
269 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
270 {
271 *i = 0;
272 return 0;
273 }
274
275 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
276 {
277 return i ? -EINVAL : 0;
278 }
279
280 static int vidioc_g_audio(struct file *file, void *priv,
281 struct v4l2_audio *a)
282 {
283 a->index = 0;
284 strlcpy(a->name, "Radio", sizeof(a->name));
285 a->capability = V4L2_AUDCAP_STEREO;
286 return 0;
287 }
288
289 static int vidioc_s_audio(struct file *file, void *priv,
290 struct v4l2_audio *a)
291 {
292 return a->index ? -EINVAL : 0;
293 }
294
295 static const struct v4l2_file_operations maestro_fops = {
296 .owner = THIS_MODULE,
297 .ioctl = video_ioctl2,
298 };
299
300 static const struct v4l2_ioctl_ops maestro_ioctl_ops = {
301 .vidioc_querycap = vidioc_querycap,
302 .vidioc_g_tuner = vidioc_g_tuner,
303 .vidioc_s_tuner = vidioc_s_tuner,
304 .vidioc_g_audio = vidioc_g_audio,
305 .vidioc_s_audio = vidioc_s_audio,
306 .vidioc_g_input = vidioc_g_input,
307 .vidioc_s_input = vidioc_s_input,
308 .vidioc_g_frequency = vidioc_g_frequency,
309 .vidioc_s_frequency = vidioc_s_frequency,
310 .vidioc_queryctrl = vidioc_queryctrl,
311 .vidioc_g_ctrl = vidioc_g_ctrl,
312 .vidioc_s_ctrl = vidioc_s_ctrl,
313 };
314
315 static u16 __devinit radio_power_on(struct maestro *dev)
316 {
317 register u16 io = dev->io;
318 register u32 ofreq;
319 u16 omask, odir;
320
321 omask = inw(io + IO_MASK);
322 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
323 outw(odir & ~STR_WREN, io + IO_DIR);
324 dev->muted = inw(io) & STR_WREN ? 0 : 1;
325 outw(odir, io + IO_DIR);
326 outw(~(STR_WREN | STR_CLK), io + IO_MASK);
327 outw(dev->muted ? 0 : STR_WREN, io);
328 udelay(16);
329 outw(omask, io + IO_MASK);
330 ofreq = radio_bits_get(dev);
331
332 if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
333 ofreq = FREQ2BITS(FREQ_LO);
334 radio_bits_set(dev, ofreq);
335
336 return (ofreq == radio_bits_get(dev));
337 }
338
339 static int __devinit maestro_probe(struct pci_dev *pdev,
340 const struct pci_device_id *ent)
341 {
342 struct maestro *dev;
343 struct v4l2_device *v4l2_dev;
344 int retval;
345
346 retval = pci_enable_device(pdev);
347 if (retval) {
348 dev_err(&pdev->dev, "enabling pci device failed!\n");
349 goto err;
350 }
351
352 retval = -ENOMEM;
353
354 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
355 if (dev == NULL) {
356 dev_err(&pdev->dev, "not enough memory\n");
357 goto err;
358 }
359
360 v4l2_dev = &dev->v4l2_dev;
361 mutex_init(&dev->lock);
362 dev->pdev = pdev;
363
364 strlcpy(v4l2_dev->name, "maestro", sizeof(v4l2_dev->name));
365
366 retval = v4l2_device_register(&pdev->dev, v4l2_dev);
367 if (retval < 0) {
368 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
369 goto errfr;
370 }
371
372 dev->io = pci_resource_start(pdev, 0) + GPIO_DATA;
373
374 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
375 dev->vdev.v4l2_dev = v4l2_dev;
376 dev->vdev.fops = &maestro_fops;
377 dev->vdev.ioctl_ops = &maestro_ioctl_ops;
378 dev->vdev.release = video_device_release_empty;
379 video_set_drvdata(&dev->vdev, dev);
380
381 retval = video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr);
382 if (retval) {
383 v4l2_err(v4l2_dev, "can't register video device!\n");
384 goto errfr1;
385 }
386
387 if (!radio_power_on(dev)) {
388 retval = -EIO;
389 goto errunr;
390 }
391
392 v4l2_info(v4l2_dev, "version " DRIVER_VERSION "\n");
393
394 return 0;
395 errunr:
396 video_unregister_device(&dev->vdev);
397 errfr1:
398 v4l2_device_unregister(v4l2_dev);
399 errfr:
400 kfree(dev);
401 err:
402 return retval;
403
404 }
405
406 static void __devexit maestro_remove(struct pci_dev *pdev)
407 {
408 struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
409 struct maestro *dev = to_maestro(v4l2_dev);
410
411 video_unregister_device(&dev->vdev);
412 v4l2_device_unregister(&dev->v4l2_dev);
413 }
414
415 static struct pci_device_id maestro_r_pci_tbl[] = {
416 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
417 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
418 .class_mask = 0xffff00 },
419 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
420 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
421 .class_mask = 0xffff00 },
422 { 0 }
423 };
424 MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
425
426 static struct pci_driver maestro_r_driver = {
427 .name = "maestro_radio",
428 .id_table = maestro_r_pci_tbl,
429 .probe = maestro_probe,
430 .remove = __devexit_p(maestro_remove),
431 };
432
433 static int __init maestro_radio_init(void)
434 {
435 int retval = pci_register_driver(&maestro_r_driver);
436
437 if (retval)
438 printk(KERN_ERR "error during registration pci driver\n");
439
440 return retval;
441 }
442
443 static void __exit maestro_radio_exit(void)
444 {
445 pci_unregister_driver(&maestro_r_driver);
446 }
447
448 module_init(maestro_radio_init);
449 module_exit(maestro_radio_exit);
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