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revert-mm-fix-blkdev-size-calculation-in-generic_write_checks
[linux-2.6/linux-trees-mm.git] / drivers / media / radio / radio-maestro.c
blob8e33a19a22a3134c16109d60ebd5bff971ec6056
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
31 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
32 #define RADIO_VERSION KERNEL_VERSION(0,0,6)
33 #define DRIVER_VERSION "0.06"
34
35 static struct v4l2_queryctrl radio_qctrl[] = {
36 {
37 .id = V4L2_CID_AUDIO_MUTE,
38 .name = "Mute",
39 .minimum = 0,
40 .maximum = 1,
41 .default_value = 1,
42 .type = V4L2_CTRL_TYPE_BOOLEAN,
43 }
44 };
45
46 #define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
47
48 #define IO_MASK 4 /* mask register offset from GPIO_DATA
49 bits 1=unmask write to given bit */
50 #define IO_DIR 8 /* direction register offset from GPIO_DATA
51 bits 0/1=read/write direction */
52
53 #define GPIO6 0x0040 /* mask bits for GPIO lines */
54 #define GPIO7 0x0080
55 #define GPIO8 0x0100
56 #define GPIO9 0x0200
57
58 #define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
59 #define STR_CLK GPIO7
60 #define STR_WREN GPIO8
61 #define STR_MOST GPIO9
62
63 #define FREQ_LO 50*16000
64 #define FREQ_HI 150*16000
65
66 #define FREQ_IF 171200 /* 10.7*16000 */
67 #define FREQ_STEP 200 /* 12.5*16 */
68
69 #define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
70 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
71
72 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
73
74 static int radio_nr = -1;
75 module_param(radio_nr, int, 0);
76
77 static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
78 static void maestro_remove(struct pci_dev *pdev);
79
80 static struct pci_device_id maestro_r_pci_tbl[] = {
81 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
82 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
83 .class_mask = 0xffff00 },
84 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
85 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
86 .class_mask = 0xffff00 },
87 { 0 }
88 };
89 MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
90
91 static struct pci_driver maestro_r_driver = {
92 .name = "maestro_radio",
93 .id_table = maestro_r_pci_tbl,
94 .probe = maestro_probe,
95 .remove = __devexit_p(maestro_remove),
96 };
97
98 static const struct file_operations maestro_fops = {
99 .owner = THIS_MODULE,
100 .open = video_exclusive_open,
101 .release = video_exclusive_release,
102 .ioctl = video_ioctl2,
103 .compat_ioctl = v4l_compat_ioctl32,
104 .llseek = no_llseek,
105 };
106
107 struct radio_device {
108 u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
109 muted, /* VIDEO_AUDIO_MUTE */
110 stereo, /* VIDEO_TUNER_STEREO_ON */
111 tuned; /* signal strength (0 or 0xffff) */
112 };
113
114 static u32 radio_bits_get(struct radio_device *dev)
115 {
116 register u16 io=dev->io, l, rdata;
117 register u32 data=0;
118 u16 omask;
119
120 omask = inw(io + IO_MASK);
121 outw(~(STR_CLK | STR_WREN), io + IO_MASK);
122 outw(0, io);
123 udelay(16);
124
125 for (l=24;l--;) {
126 outw(STR_CLK, io); /* HI state */
127 udelay(2);
128 if(!l)
129 dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
130 outw(0, io); /* LO state */
131 udelay(2);
132 data <<= 1; /* shift data */
133 rdata = inw(io);
134 if(!l)
135 dev->stereo = rdata & STR_MOST ?
136 0 : 1;
137 else
138 if(rdata & STR_DATA)
139 data++;
140 udelay(2);
141 }
142
143 if(dev->muted)
144 outw(STR_WREN, io);
145
146 udelay(4);
147 outw(omask, io + IO_MASK);
148
149 return data & 0x3ffe;
150 }
151
152 static void radio_bits_set(struct radio_device *dev, u32 data)
153 {
154 register u16 io=dev->io, l, bits;
155 u16 omask, odir;
156
157 omask = inw(io + IO_MASK);
158 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
159 outw(odir | STR_DATA, io + IO_DIR);
160 outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
161 udelay(16);
162 for (l=25;l;l--) {
163 bits = ((data >> 18) & STR_DATA) | STR_WREN ;
164 data <<= 1; /* shift data */
165 outw(bits, io); /* start strobe */
166 udelay(2);
167 outw(bits | STR_CLK, io); /* HI level */
168 udelay(2);
169 outw(bits, io); /* LO level */
170 udelay(4);
171 }
172
173 if(!dev->muted)
174 outw(0, io);
175
176 udelay(4);
177 outw(omask, io + IO_MASK);
178 outw(odir, io + IO_DIR);
179 msleep(125);
180 }
181
182 static int vidioc_querycap(struct file *file, void *priv,
183 struct v4l2_capability *v)
184 {
185 strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
186 strlcpy(v->card, "Maestro Radio", sizeof(v->card));
187 sprintf(v->bus_info, "PCI");
188 v->version = RADIO_VERSION;
189 v->capabilities = V4L2_CAP_TUNER;
190 return 0;
191 }
192
193 static int vidioc_g_tuner(struct file *file, void *priv,
194 struct v4l2_tuner *v)
195 {
196 struct video_device *dev = video_devdata(file);
197 struct radio_device *card = video_get_drvdata(dev);
198
199 if (v->index > 0)
200 return -EINVAL;
201
202 (void)radio_bits_get(card);
203
204 strcpy(v->name, "FM");
205 v->type = V4L2_TUNER_RADIO;
206 v->rangelow = FREQ_LO;
207 v->rangehigh = FREQ_HI;
208 v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
209 v->capability = V4L2_TUNER_CAP_LOW;
210 if(card->stereo)
211 v->audmode = V4L2_TUNER_MODE_STEREO;
212 else
213 v->audmode = V4L2_TUNER_MODE_MONO;
214 v->signal = card->tuned;
215 return 0;
216 }
217
218 static int vidioc_s_tuner(struct file *file, void *priv,
219 struct v4l2_tuner *v)
220 {
221 if (v->index > 0)
222 return -EINVAL;
223 return 0;
224 }
225
226 static int vidioc_s_frequency(struct file *file, void *priv,
227 struct v4l2_frequency *f)
228 {
229 struct video_device *dev = video_devdata(file);
230 struct radio_device *card = video_get_drvdata(dev);
231
232 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
233 return -EINVAL;
234 radio_bits_set(card, FREQ2BITS(f->frequency));
235 return 0;
236 }
237
238 static int vidioc_g_frequency(struct file *file, void *priv,
239 struct v4l2_frequency *f)
240 {
241 struct video_device *dev = video_devdata(file);
242 struct radio_device *card = video_get_drvdata(dev);
243
244 f->type = V4L2_TUNER_RADIO;
245 f->frequency = BITS2FREQ(radio_bits_get(card));
246 return 0;
247 }
248
249 static int vidioc_queryctrl(struct file *file, void *priv,
250 struct v4l2_queryctrl *qc)
251 {
252 int i;
253
254 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
255 if (qc->id && qc->id == radio_qctrl[i].id) {
256 memcpy(qc, &(radio_qctrl[i]),
257 sizeof(*qc));
258 return 0;
259 }
260 }
261 return -EINVAL;
262 }
263
264 static int vidioc_g_ctrl(struct file *file, void *priv,
265 struct v4l2_control *ctrl)
266 {
267 struct video_device *dev = video_devdata(file);
268 struct radio_device *card = video_get_drvdata(dev);
269
270 switch (ctrl->id) {
271 case V4L2_CID_AUDIO_MUTE:
272 ctrl->value = card->muted;
273 return 0;
274 }
275 return -EINVAL;
276 }
277
278 static int vidioc_s_ctrl(struct file *file, void *priv,
279 struct v4l2_control *ctrl)
280 {
281 struct video_device *dev = video_devdata(file);
282 struct radio_device *card = video_get_drvdata(dev);
283 register u16 io = card->io;
284 register u16 omask = inw(io + IO_MASK);
285
286 switch (ctrl->id) {
287 case V4L2_CID_AUDIO_MUTE:
288 outw(~STR_WREN, io + IO_MASK);
289 outw((card->muted = ctrl->value ) ?
290 STR_WREN : 0, io);
291 udelay(4);
292 outw(omask, io + IO_MASK);
293 msleep(125);
294 return 0;
295 }
296 return -EINVAL;
297 }
298
299 static int vidioc_g_audio(struct file *file, void *priv,
300 struct v4l2_audio *a)
301 {
302 if (a->index > 1)
303 return -EINVAL;
304
305 strcpy(a->name, "Radio");
306 a->capability = V4L2_AUDCAP_STEREO;
307 return 0;
308 }
309
310 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
311 {
312 *i = 0;
313 return 0;
314 }
315
316 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
317 {
318 if (i != 0)
319 return -EINVAL;
320 return 0;
321 }
322
323 static int vidioc_s_audio(struct file *file, void *priv,
324 struct v4l2_audio *a)
325 {
326 if (a->index != 0)
327 return -EINVAL;
328 return 0;
329 }
330
331 static u16 __devinit radio_power_on(struct radio_device *dev)
332 {
333 register u16 io = dev->io;
334 register u32 ofreq;
335 u16 omask, odir;
336
337 omask = inw(io + IO_MASK);
338 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
339 outw(odir & ~STR_WREN, io + IO_DIR);
340 dev->muted = inw(io) & STR_WREN ? 0 : 1;
341 outw(odir, io + IO_DIR);
342 outw(~(STR_WREN | STR_CLK), io + IO_MASK);
343 outw(dev->muted ? 0 : STR_WREN, io);
344 udelay(16);
345 outw(omask, io + IO_MASK);
346 ofreq = radio_bits_get(dev);
347
348 if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
349 ofreq = FREQ2BITS(FREQ_LO);
350 radio_bits_set(dev, ofreq);
351
352 return (ofreq == radio_bits_get(dev));
353 }
354
355 static struct video_device maestro_radio = {
356 .name = "Maestro radio",
357 .type = VID_TYPE_TUNER,
358 .fops = &maestro_fops,
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 int __devinit maestro_probe(struct pci_dev *pdev,
374 const struct pci_device_id *ent)
375 {
376 struct radio_device *radio_unit;
377 struct video_device *maestro_radio_inst;
378 int retval;
379
380 retval = pci_enable_device(pdev);
381 if (retval) {
382 dev_err(&pdev->dev, "enabling pci device failed!\n");
383 goto err;
384 }
385
386 retval = -ENOMEM;
387
388 radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
389 if (radio_unit == NULL) {
390 dev_err(&pdev->dev, "not enough memory\n");
391 goto err;
392 }
393
394 radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
395
396 maestro_radio_inst = video_device_alloc();
397 if (maestro_radio_inst == NULL) {
398 dev_err(&pdev->dev, "not enough memory\n");
399 goto errfr;
400 }
401
402 memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
403 video_set_drvdata(maestro_radio_inst, radio_unit);
404 pci_set_drvdata(pdev, maestro_radio_inst);
405
406 retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO,
407 radio_nr);
408 if (retval) {
409 printk(KERN_ERR "can't register video device!\n");
410 goto errfr1;
411 }
412
413 if (!radio_power_on(radio_unit)) {
414 retval = -EIO;
415 goto errunr;
416 }
417
418 dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " "
419 __DATE__ "\n");
420 dev_info(&pdev->dev, "radio chip initialized\n");
421
422 return 0;
423 errunr:
424 video_unregister_device(maestro_radio_inst);
425 errfr1:
426 kfree(maestro_radio_inst);
427 errfr:
428 kfree(radio_unit);
429 err:
430 return retval;
431
432 }
433
434 static void __devexit maestro_remove(struct pci_dev *pdev)
435 {
436 struct video_device *vdev = pci_get_drvdata(pdev);
437
438 video_unregister_device(vdev);
439 }
440
441 static int __init maestro_radio_init(void)
442 {
443 int retval = pci_register_driver(&maestro_r_driver);
444
445 if (retval)
446 printk(KERN_ERR "error during registration pci driver\n");
447
448 return retval;
449 }
450
451 static void __exit maestro_radio_exit(void)
452 {
453 pci_unregister_driver(&maestro_r_driver);
454 }
455
456 module_init(maestro_radio_init);
457 module_exit(maestro_radio_exit);
458
459 MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
460 MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
461 MODULE_LICENSE("GPL");
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