Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
[linux-2.6] / drivers / media / radio / radio-trust.c
1 /* radio-trust.c - Trust FM Radio card driver for Linux 2.2
2  * by Eric Lammerts <eric@scintilla.utwente.nl>
3  *
4  * Based on radio-aztech.c. Original notes:
5  *
6  * Adapted to support the Video for Linux API by
7  * Russell Kroll <rkroll@exploits.org>.  Based on original tuner code by:
8  *
9  * Quay Ly
10  * Donald Song
11  * Jason Lewis      (jlewis@twilight.vtc.vsc.edu)
12  * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)
13  * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)
14  *
15  * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
16  */
17
18 #include <stdarg.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <asm/io.h>
23 #include <asm/uaccess.h>
24 #include <linux/videodev2.h>
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-ioctl.h>
27
28 #include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
29 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
30
31 static struct v4l2_queryctrl radio_qctrl[] = {
32         {
33                 .id            = V4L2_CID_AUDIO_MUTE,
34                 .name          = "Mute",
35                 .minimum       = 0,
36                 .maximum       = 1,
37                 .default_value = 1,
38                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
39         },{
40                 .id            = V4L2_CID_AUDIO_VOLUME,
41                 .name          = "Volume",
42                 .minimum       = 0,
43                 .maximum       = 65535,
44                 .step          = 2048,
45                 .default_value = 65535,
46                 .type          = V4L2_CTRL_TYPE_INTEGER,
47         },{
48                 .id            = V4L2_CID_AUDIO_BASS,
49                 .name          = "Bass",
50                 .minimum       = 0,
51                 .maximum       = 65535,
52                 .step          = 4370,
53                 .default_value = 32768,
54                 .type          = V4L2_CTRL_TYPE_INTEGER,
55         },{
56                 .id            = V4L2_CID_AUDIO_TREBLE,
57                 .name          = "Treble",
58                 .minimum       = 0,
59                 .maximum       = 65535,
60                 .step          = 4370,
61                 .default_value = 32768,
62                 .type          = V4L2_CTRL_TYPE_INTEGER,
63         },
64 };
65
66 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
67
68 #ifndef CONFIG_RADIO_TRUST_PORT
69 #define CONFIG_RADIO_TRUST_PORT -1
70 #endif
71
72 static int io = CONFIG_RADIO_TRUST_PORT;
73 static int radio_nr = -1;
74 static int ioval = 0xf;
75 static __u16 curvol;
76 static __u16 curbass;
77 static __u16 curtreble;
78 static unsigned long curfreq;
79 static int curstereo;
80 static int curmute;
81 static unsigned long in_use;
82
83 /* i2c addresses */
84 #define TDA7318_ADDR 0x88
85 #define TSA6060T_ADDR 0xc4
86
87 #define TR_DELAY do { inb(io); inb(io); inb(io); } while(0)
88 #define TR_SET_SCL outb(ioval |= 2, io)
89 #define TR_CLR_SCL outb(ioval &= 0xfd, io)
90 #define TR_SET_SDA outb(ioval |= 1, io)
91 #define TR_CLR_SDA outb(ioval &= 0xfe, io)
92
93 static void write_i2c(int n, ...)
94 {
95         unsigned char val, mask;
96         va_list args;
97
98         va_start(args, n);
99
100         /* start condition */
101         TR_SET_SDA;
102         TR_SET_SCL;
103         TR_DELAY;
104         TR_CLR_SDA;
105         TR_CLR_SCL;
106         TR_DELAY;
107
108         for(; n; n--) {
109                 val = va_arg(args, unsigned);
110                 for(mask = 0x80; mask; mask >>= 1) {
111                         if(val & mask)
112                                 TR_SET_SDA;
113                         else
114                                 TR_CLR_SDA;
115                         TR_SET_SCL;
116                         TR_DELAY;
117                         TR_CLR_SCL;
118                         TR_DELAY;
119                 }
120                 /* acknowledge bit */
121                 TR_SET_SDA;
122                 TR_SET_SCL;
123                 TR_DELAY;
124                 TR_CLR_SCL;
125                 TR_DELAY;
126         }
127
128         /* stop condition */
129         TR_CLR_SDA;
130         TR_DELAY;
131         TR_SET_SCL;
132         TR_DELAY;
133         TR_SET_SDA;
134         TR_DELAY;
135
136         va_end(args);
137 }
138
139 static void tr_setvol(__u16 vol)
140 {
141         curvol = vol / 2048;
142         write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f);
143 }
144
145 static int basstreble2chip[15] = {
146         0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
147 };
148
149 static void tr_setbass(__u16 bass)
150 {
151         curbass = bass / 4370;
152         write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]);
153 }
154
155 static void tr_settreble(__u16 treble)
156 {
157         curtreble = treble / 4370;
158         write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]);
159 }
160
161 static void tr_setstereo(int stereo)
162 {
163         curstereo = !!stereo;
164         ioval = (ioval & 0xfb) | (!curstereo << 2);
165         outb(ioval, io);
166 }
167
168 static void tr_setmute(int mute)
169 {
170         curmute = !!mute;
171         ioval = (ioval & 0xf7) | (curmute << 3);
172         outb(ioval, io);
173 }
174
175 static int tr_getsigstr(void)
176 {
177         int i, v;
178
179         for(i = 0, v = 0; i < 100; i++) v |= inb(io);
180         return (v & 1)? 0 : 0xffff;
181 }
182
183 static int tr_getstereo(void)
184 {
185         /* don't know how to determine it, just return the setting */
186         return curstereo;
187 }
188
189 static void tr_setfreq(unsigned long f)
190 {
191         f /= 160;       /* Convert to 10 kHz units      */
192         f += 1070;      /* Add 10.7 MHz IF                      */
193
194         write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
195 }
196
197 static int vidioc_querycap(struct file *file, void *priv,
198                                 struct v4l2_capability *v)
199 {
200         strlcpy(v->driver, "radio-trust", sizeof(v->driver));
201         strlcpy(v->card, "Trust FM Radio", sizeof(v->card));
202         sprintf(v->bus_info, "ISA");
203         v->version = RADIO_VERSION;
204         v->capabilities = V4L2_CAP_TUNER;
205         return 0;
206 }
207
208 static int vidioc_g_tuner(struct file *file, void *priv,
209                                 struct v4l2_tuner *v)
210 {
211         if (v->index > 0)
212                 return -EINVAL;
213
214         strcpy(v->name, "FM");
215         v->type = V4L2_TUNER_RADIO;
216         v->rangelow = (87.5*16000);
217         v->rangehigh = (108*16000);
218         v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
219         v->capability = V4L2_TUNER_CAP_LOW;
220         if (tr_getstereo())
221                 v->audmode = V4L2_TUNER_MODE_STEREO;
222         else
223                 v->audmode = V4L2_TUNER_MODE_MONO;
224         v->signal = tr_getsigstr();
225         return 0;
226 }
227
228 static int vidioc_s_tuner(struct file *file, void *priv,
229                                 struct v4l2_tuner *v)
230 {
231         if (v->index > 0)
232                 return -EINVAL;
233
234         return 0;
235 }
236
237 static int vidioc_s_frequency(struct file *file, void *priv,
238                                 struct v4l2_frequency *f)
239 {
240         curfreq = f->frequency;
241         tr_setfreq(curfreq);
242         return 0;
243 }
244
245 static int vidioc_g_frequency(struct file *file, void *priv,
246                                 struct v4l2_frequency *f)
247 {
248         f->type = V4L2_TUNER_RADIO;
249         f->frequency = curfreq;
250         return 0;
251 }
252
253 static int vidioc_queryctrl(struct file *file, void *priv,
254                                 struct v4l2_queryctrl *qc)
255 {
256         int i;
257
258         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
259                 if (qc->id && qc->id == radio_qctrl[i].id) {
260                         memcpy(qc, &(radio_qctrl[i]),
261                                                 sizeof(*qc));
262                         return 0;
263                 }
264         }
265         return -EINVAL;
266 }
267
268 static int vidioc_g_ctrl(struct file *file, void *priv,
269                                 struct v4l2_control *ctrl)
270 {
271         switch (ctrl->id) {
272         case V4L2_CID_AUDIO_MUTE:
273                 ctrl->value = curmute;
274                 return 0;
275         case V4L2_CID_AUDIO_VOLUME:
276                 ctrl->value = curvol * 2048;
277                 return 0;
278         case V4L2_CID_AUDIO_BASS:
279                 ctrl->value = curbass * 4370;
280                 return 0;
281         case V4L2_CID_AUDIO_TREBLE:
282                 ctrl->value = curtreble * 4370;
283                 return 0;
284         }
285         return -EINVAL;
286 }
287
288 static int vidioc_s_ctrl(struct file *file, void *priv,
289                                 struct v4l2_control *ctrl)
290 {
291         switch (ctrl->id) {
292         case V4L2_CID_AUDIO_MUTE:
293                 tr_setmute(ctrl->value);
294                 return 0;
295         case V4L2_CID_AUDIO_VOLUME:
296                 tr_setvol(ctrl->value);
297                 return 0;
298         case V4L2_CID_AUDIO_BASS:
299                 tr_setbass(ctrl->value);
300                 return 0;
301         case V4L2_CID_AUDIO_TREBLE:
302                 tr_settreble(ctrl->value);
303                 return 0;
304         }
305         return -EINVAL;
306 }
307
308 static int vidioc_g_audio(struct file *file, void *priv,
309                                 struct v4l2_audio *a)
310 {
311         if (a->index > 1)
312                 return -EINVAL;
313
314         strcpy(a->name, "Radio");
315         a->capability = V4L2_AUDCAP_STEREO;
316         return 0;
317 }
318
319 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
320 {
321         *i = 0;
322         return 0;
323 }
324
325 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
326 {
327         if (i != 0)
328                 return -EINVAL;
329         return 0;
330 }
331
332 static int vidioc_s_audio(struct file *file, void *priv,
333                                 struct v4l2_audio *a)
334 {
335         if (a->index != 0)
336                 return -EINVAL;
337         return 0;
338 }
339
340 static int trust_exclusive_open(struct inode *inode, struct file *file)
341 {
342         return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
343 }
344
345 static int trust_exclusive_release(struct inode *inode, struct file *file)
346 {
347         clear_bit(0, &in_use);
348         return 0;
349 }
350
351 static const struct file_operations trust_fops = {
352         .owner          = THIS_MODULE,
353         .open           = trust_exclusive_open,
354         .release        = trust_exclusive_release,
355         .ioctl          = video_ioctl2,
356 #ifdef CONFIG_COMPAT
357         .compat_ioctl   = v4l_compat_ioctl32,
358 #endif
359         .llseek         = no_llseek,
360 };
361
362 static const struct v4l2_ioctl_ops trust_ioctl_ops = {
363         .vidioc_querycap    = vidioc_querycap,
364         .vidioc_g_tuner     = vidioc_g_tuner,
365         .vidioc_s_tuner     = vidioc_s_tuner,
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         .vidioc_g_audio     = vidioc_g_audio,
372         .vidioc_s_audio     = vidioc_s_audio,
373         .vidioc_g_input     = vidioc_g_input,
374         .vidioc_s_input     = vidioc_s_input,
375 };
376
377 static struct video_device trust_radio = {
378         .name           = "Trust FM Radio",
379         .fops           = &trust_fops,
380         .ioctl_ops      = &trust_ioctl_ops,
381         .release        = video_device_release_empty,
382 };
383
384 static int __init trust_init(void)
385 {
386         if(io == -1) {
387                 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
388                 return -EINVAL;
389         }
390         if(!request_region(io, 2, "Trust FM Radio")) {
391                 printk(KERN_ERR "trust: port 0x%x already in use\n", io);
392                 return -EBUSY;
393         }
394         if (video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
395                 release_region(io, 2);
396                 return -EINVAL;
397         }
398
399         printk(KERN_INFO "Trust FM Radio card driver v1.0.\n");
400
401         write_i2c(2, TDA7318_ADDR, 0x80);       /* speaker att. LF = 0 dB */
402         write_i2c(2, TDA7318_ADDR, 0xa0);       /* speaker att. RF = 0 dB */
403         write_i2c(2, TDA7318_ADDR, 0xc0);       /* speaker att. LR = 0 dB */
404         write_i2c(2, TDA7318_ADDR, 0xe0);       /* speaker att. RR = 0 dB */
405         write_i2c(2, TDA7318_ADDR, 0x40);       /* stereo 1 input, gain = 18.75 dB */
406
407         tr_setvol(0x8000);
408         tr_setbass(0x8000);
409         tr_settreble(0x8000);
410         tr_setstereo(1);
411
412         /* mute card - prevents noisy bootups */
413         tr_setmute(1);
414
415         return 0;
416 }
417
418 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
419 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
420 MODULE_LICENSE("GPL");
421
422 module_param(io, int, 0);
423 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
424 module_param(radio_nr, int, 0);
425
426 static void __exit cleanup_trust_module(void)
427 {
428         video_unregister_device(&trust_radio);
429         release_region(io, 2);
430 }
431
432 module_init(trust_init);
433 module_exit(cleanup_trust_module);