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[PATCH] W1: possible cleanups
[linux-2.6/verdex.git] / drivers / media / radio / radio-maestro.c
blob39c1d9118636af1a03804a42cde2f0559d2ca173
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
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <linux/delay.h>
23 #include <linux/sched.h>
24 #include <asm/io.h>
25 #include <asm/uaccess.h>
26 #include <linux/mutex.h>
27 #include <linux/pci.h>
28 #include <linux/videodev.h>
29
30
31 #define DRIVER_VERSION "0.05"
32
33 #define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
34
35 #define IO_MASK 4 /* mask register offset from GPIO_DATA
36 bits 1=unmask write to given bit */
37 #define IO_DIR 8 /* direction register offset from GPIO_DATA
38 bits 0/1=read/write direction */
39
40 #define GPIO6 0x0040 /* mask bits for GPIO lines */
41 #define GPIO7 0x0080
42 #define GPIO8 0x0100
43 #define GPIO9 0x0200
44
45 #define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
46 #define STR_CLK GPIO7
47 #define STR_WREN GPIO8
48 #define STR_MOST GPIO9
49
50 #define FREQ_LO 50*16000
51 #define FREQ_HI 150*16000
52
53 #define FREQ_IF 171200 /* 10.7*16000 */
54 #define FREQ_STEP 200 /* 12.5*16 */
55
56 #define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
57 /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
58
59 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
60
61 static int radio_nr = -1;
62 module_param(radio_nr, int, 0);
63
64 static int radio_ioctl(struct inode *inode, struct file *file,
65 unsigned int cmd, unsigned long arg);
66 static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
67 static void maestro_remove(struct pci_dev *pdev);
68
69 static struct pci_device_id maestro_r_pci_tbl[] = {
70 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
71 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
72 .class_mask = 0xffff00 },
73 { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
74 .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
75 .class_mask = 0xffff00 },
76 { 0 }
77 };
78 MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
79
80 static struct pci_driver maestro_r_driver = {
81 .name = "maestro_radio",
82 .id_table = maestro_r_pci_tbl,
83 .probe = maestro_probe,
84 .remove = __devexit_p(maestro_remove),
85 };
86
87 static struct file_operations maestro_fops = {
88 .owner = THIS_MODULE,
89 .open = video_exclusive_open,
90 .release = video_exclusive_release,
91 .ioctl = radio_ioctl,
92 .compat_ioctl = v4l_compat_ioctl32,
93 .llseek = no_llseek,
94 };
95
96 static struct video_device maestro_radio = {
97 .name = "Maestro radio",
98 .type = VID_TYPE_TUNER,
99 .hardware = VID_HARDWARE_SF16MI,
100 .fops = &maestro_fops,
101 };
102
103 struct radio_device {
104 u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
105 muted, /* VIDEO_AUDIO_MUTE */
106 stereo, /* VIDEO_TUNER_STEREO_ON */
107 tuned; /* signal strength (0 or 0xffff) */
108 struct mutex lock;
109 };
110
111 static u32 radio_bits_get(struct radio_device *dev)
112 {
113 register u16 io=dev->io, l, rdata;
114 register u32 data=0;
115 u16 omask;
116
117 omask = inw(io + IO_MASK);
118 outw(~(STR_CLK | STR_WREN), io + IO_MASK);
119 outw(0, io);
120 udelay(16);
121
122 for (l=24;l--;) {
123 outw(STR_CLK, io); /* HI state */
124 udelay(2);
125 if(!l)
126 dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
127 outw(0, io); /* LO state */
128 udelay(2);
129 data <<= 1; /* shift data */
130 rdata = inw(io);
131 if(!l)
132 dev->stereo = rdata & STR_MOST ?
133 0 : VIDEO_TUNER_STEREO_ON;
134 else
135 if(rdata & STR_DATA)
136 data++;
137 udelay(2);
138 }
139
140 if(dev->muted)
141 outw(STR_WREN, io);
142
143 udelay(4);
144 outw(omask, io + IO_MASK);
145
146 return data & 0x3ffe;
147 }
148
149 static void radio_bits_set(struct radio_device *dev, u32 data)
150 {
151 register u16 io=dev->io, l, bits;
152 u16 omask, odir;
153
154 omask = inw(io + IO_MASK);
155 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
156 outw(odir | STR_DATA, io + IO_DIR);
157 outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
158 udelay(16);
159 for (l=25;l;l--) {
160 bits = ((data >> 18) & STR_DATA) | STR_WREN ;
161 data <<= 1; /* shift data */
162 outw(bits, io); /* start strobe */
163 udelay(2);
164 outw(bits | STR_CLK, io); /* HI level */
165 udelay(2);
166 outw(bits, io); /* LO level */
167 udelay(4);
168 }
169
170 if(!dev->muted)
171 outw(0, io);
172
173 udelay(4);
174 outw(omask, io + IO_MASK);
175 outw(odir, io + IO_DIR);
176 msleep(125);
177 }
178
179 static inline int radio_function(struct inode *inode, struct file *file,
180 unsigned int cmd, void *arg)
181 {
182 struct video_device *dev = video_devdata(file);
183 struct radio_device *card = video_get_drvdata(dev);
184
185 switch (cmd) {
186 case VIDIOCGCAP: {
187 struct video_capability *v = arg;
188 memset(v, 0, sizeof(*v));
189 strcpy(v->name, "Maestro radio");
190 v->type = VID_TYPE_TUNER;
191 v->channels = v->audios = 1;
192 return 0;
193 } case VIDIOCGTUNER: {
194 struct video_tuner *v = arg;
195 if (v->tuner)
196 return -EINVAL;
197 (void)radio_bits_get(card);
198 v->flags = VIDEO_TUNER_LOW | card->stereo;
199 v->signal = card->tuned;
200 strcpy(v->name, "FM");
201 v->rangelow = FREQ_LO;
202 v->rangehigh = FREQ_HI;
203 v->mode = VIDEO_MODE_AUTO;
204 return 0;
205 } case VIDIOCSTUNER: {
206 struct video_tuner *v = arg;
207 if (v->tuner != 0)
208 return -EINVAL;
209 return 0;
210 } case VIDIOCGFREQ: {
211 unsigned long *freq = arg;
212 *freq = BITS2FREQ(radio_bits_get(card));
213 return 0;
214 } case VIDIOCSFREQ: {
215 unsigned long *freq = arg;
216 if (*freq < FREQ_LO || *freq > FREQ_HI)
217 return -EINVAL;
218 radio_bits_set(card, FREQ2BITS(*freq));
219 return 0;
220 } case VIDIOCGAUDIO: {
221 struct video_audio *v = arg;
222 memset(v, 0, sizeof(*v));
223 strcpy(v->name, "Radio");
224 v->flags = VIDEO_AUDIO_MUTABLE | card->muted;
225 v->mode = VIDEO_SOUND_STEREO;
226 return 0;
227 } case VIDIOCSAUDIO: {
228 struct video_audio *v = arg;
229 if (v->audio)
230 return -EINVAL;
231 {
232 register u16 io = card->io;
233 register u16 omask = inw(io + IO_MASK);
234 outw(~STR_WREN, io + IO_MASK);
235 outw((card->muted = v->flags & VIDEO_AUDIO_MUTE) ?
236 STR_WREN : 0, io);
237 udelay(4);
238 outw(omask, io + IO_MASK);
239 msleep(125);
240 return 0;
241 }
242 } case VIDIOCGUNIT: {
243 struct video_unit *v = arg;
244 v->video = VIDEO_NO_UNIT;
245 v->vbi = VIDEO_NO_UNIT;
246 v->radio = dev->minor;
247 v->audio = 0;
248 v->teletext = VIDEO_NO_UNIT;
249 return 0;
250 } default:
251 return -ENOIOCTLCMD;
252 }
253 }
254
255 static int radio_ioctl(struct inode *inode, struct file *file,
256 unsigned int cmd, unsigned long arg)
257 {
258 struct video_device *dev = video_devdata(file);
259 struct radio_device *card = video_get_drvdata(dev);
260 int ret;
261
262 mutex_lock(&card->lock);
263 ret = video_usercopy(inode, file, cmd, arg, radio_function);
264 mutex_unlock(&card->lock);
265
266 return ret;
267 }
268
269 static u16 __devinit radio_power_on(struct radio_device *dev)
270 {
271 register u16 io = dev->io;
272 register u32 ofreq;
273 u16 omask, odir;
274
275 omask = inw(io + IO_MASK);
276 odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
277 outw(odir & ~STR_WREN, io + IO_DIR);
278 dev->muted = inw(io) & STR_WREN ? 0 : VIDEO_AUDIO_MUTE;
279 outw(odir, io + IO_DIR);
280 outw(~(STR_WREN | STR_CLK), io + IO_MASK);
281 outw(dev->muted ? 0 : STR_WREN, io);
282 udelay(16);
283 outw(omask, io + IO_MASK);
284 ofreq = radio_bits_get(dev);
285
286 if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI)))
287 ofreq = FREQ2BITS(FREQ_LO);
288 radio_bits_set(dev, ofreq);
289
290 return (ofreq == radio_bits_get(dev));
291 }
292
293 static int __devinit maestro_probe(struct pci_dev *pdev,
294 const struct pci_device_id *ent)
295 {
296 struct radio_device *radio_unit;
297 struct video_device *maestro_radio_inst;
298 int retval;
299
300 retval = pci_enable_device(pdev);
301 if (retval) {
302 dev_err(&pdev->dev, "enabling pci device failed!\n");
303 goto err;
304 }
305
306 retval = -ENOMEM;
307
308 radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
309 if (radio_unit == NULL) {
310 dev_err(&pdev->dev, "not enough memory\n");
311 goto err;
312 }
313
314 radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
315 mutex_init(&radio_unit->lock);
316
317 maestro_radio_inst = video_device_alloc();
318 if (maestro_radio_inst == NULL) {
319 dev_err(&pdev->dev, "not enough memory\n");
320 goto errfr;
321 }
322
323 memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
324 video_set_drvdata(maestro_radio_inst, radio_unit);
325 pci_set_drvdata(pdev, maestro_radio_inst);
326
327 retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO,
328 radio_nr);
329 if (retval) {
330 printk(KERN_ERR "can't register video device!\n");
331 goto errfr1;
332 }
333
334 if (!radio_power_on(radio_unit)) {
335 retval = -EIO;
336 goto errunr;
337 }
338
339 dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " "
340 __DATE__ "\n");
341 dev_info(&pdev->dev, "radio chip initialized\n");
342
343 return 0;
344 errunr:
345 video_unregister_device(maestro_radio_inst);
346 errfr1:
347 kfree(maestro_radio_inst);
348 errfr:
349 kfree(radio_unit);
350 err:
351 return retval;
352
353 }
354
355 static void __devexit maestro_remove(struct pci_dev *pdev)
356 {
357 struct video_device *vdev = pci_get_drvdata(pdev);
358
359 video_unregister_device(vdev);
360 }
361
362 static int __init maestro_radio_init(void)
363 {
364 int retval = pci_register_driver(&maestro_r_driver);
365
366 if (retval)
367 printk(KERN_ERR "error during registration pci driver\n");
368
369 return retval;
370 }
371
372 static void __exit maestro_radio_exit(void)
373 {
374 pci_unregister_driver(&maestro_r_driver);
375 }
376
377 module_init(maestro_radio_init);
378 module_exit(maestro_radio_exit);
379
380 MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
381 MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
382 MODULE_LICENSE("GPL");
Verdex Pro support