Commit | Line | Data |
---|---|---|
56fc08ca | 1 | /* |
56fc08ca MCC |
2 | */ |
3 | ||
1da177e4 LT |
4 | #include <linux/module.h> |
5 | #include <linux/moduleparam.h> | |
6 | #include <linux/kernel.h> | |
7 | #include <linux/sched.h> | |
8 | #include <linux/string.h> | |
9 | #include <linux/timer.h> | |
10 | #include <linux/delay.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/videodev.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/kdev_t.h> | |
17 | #include <linux/sound.h> | |
18 | #include <linux/soundcard.h> | |
19 | ||
20 | #include <asm/semaphore.h> | |
21 | #include <asm/uaccess.h> | |
22 | ||
23 | ||
24 | #define DEV_MAX 4 | |
25 | ||
26 | static int devnr = -1; | |
27 | module_param(devnr, int, 0644); | |
28 | ||
29 | MODULE_AUTHOR("Gerd Knorr"); | |
30 | MODULE_LICENSE("GPL"); | |
31 | ||
32 | /* ----------------------------------------------------------------------- */ | |
33 | ||
34 | struct TVMIXER { | |
35 | struct i2c_client *dev; | |
36 | int minor; | |
37 | int count; | |
38 | }; | |
39 | ||
40 | static struct TVMIXER devices[DEV_MAX]; | |
41 | ||
42 | static int tvmixer_adapters(struct i2c_adapter *adap); | |
43 | static int tvmixer_clients(struct i2c_client *client); | |
44 | ||
45 | /* ----------------------------------------------------------------------- */ | |
46 | ||
47 | static int mix_to_v4l(int i) | |
48 | { | |
49 | int r; | |
50 | ||
51 | r = ((i & 0xff) * 65536 + 50) / 100; | |
52 | if (r > 65535) r = 65535; | |
53 | if (r < 0) r = 0; | |
54 | return r; | |
55 | } | |
56 | ||
57 | static int v4l_to_mix(int i) | |
58 | { | |
59 | int r; | |
60 | ||
61 | r = (i * 100 + 32768) / 65536; | |
62 | if (r > 100) r = 100; | |
63 | if (r < 0) r = 0; | |
64 | return r | (r << 8); | |
65 | } | |
66 | ||
67 | static int v4l_to_mix2(int l, int r) | |
68 | { | |
69 | r = (r * 100 + 32768) / 65536; | |
70 | if (r > 100) r = 100; | |
71 | if (r < 0) r = 0; | |
72 | l = (l * 100 + 32768) / 65536; | |
73 | if (l > 100) l = 100; | |
74 | if (l < 0) l = 0; | |
75 | return (r << 8) | l; | |
76 | } | |
77 | ||
78 | static int tvmixer_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
79 | { | |
80 | struct video_audio va; | |
81 | int left,right,ret,val = 0; | |
4ac97914 | 82 | struct TVMIXER *mix = file->private_data; |
1da177e4 LT |
83 | struct i2c_client *client = mix->dev; |
84 | void __user *argp = (void __user *)arg; | |
85 | int __user *p = argp; | |
86 | ||
87 | if (NULL == client) | |
88 | return -ENODEV; | |
89 | ||
4ac97914 MCC |
90 | if (cmd == SOUND_MIXER_INFO) { |
91 | mixer_info info; | |
92 | strlcpy(info.id, "tv card", sizeof(info.id)); | |
93 | strlcpy(info.name, client->name, sizeof(info.name)); | |
94 | info.modify_counter = 42 /* FIXME */; | |
95 | if (copy_to_user(argp, &info, sizeof(info))) | |
96 | return -EFAULT; | |
97 | return 0; | |
98 | } | |
99 | if (cmd == SOUND_OLD_MIXER_INFO) { | |
100 | _old_mixer_info info; | |
101 | strlcpy(info.id, "tv card", sizeof(info.id)); | |
102 | strlcpy(info.name, client->name, sizeof(info.name)); | |
103 | if (copy_to_user(argp, &info, sizeof(info))) | |
104 | return -EFAULT; | |
105 | return 0; | |
106 | } | |
107 | if (cmd == OSS_GETVERSION) | |
108 | return put_user(SOUND_VERSION, p); | |
1da177e4 LT |
109 | |
110 | if (_SIOC_DIR(cmd) & _SIOC_WRITE) | |
111 | if (get_user(val, p)) | |
112 | return -EFAULT; | |
113 | ||
114 | /* read state */ | |
115 | memset(&va,0,sizeof(va)); | |
116 | client->driver->command(client,VIDIOCGAUDIO,&va); | |
117 | ||
118 | switch (cmd) { | |
119 | case MIXER_READ(SOUND_MIXER_RECMASK): | |
120 | case MIXER_READ(SOUND_MIXER_CAPS): | |
121 | case MIXER_READ(SOUND_MIXER_RECSRC): | |
122 | case MIXER_WRITE(SOUND_MIXER_RECSRC): | |
123 | ret = 0; | |
124 | break; | |
125 | ||
126 | case MIXER_READ(SOUND_MIXER_STEREODEVS): | |
127 | ret = SOUND_MASK_VOLUME; | |
128 | break; | |
129 | case MIXER_READ(SOUND_MIXER_DEVMASK): | |
130 | ret = SOUND_MASK_VOLUME; | |
131 | if (va.flags & VIDEO_AUDIO_BASS) | |
132 | ret |= SOUND_MASK_BASS; | |
133 | if (va.flags & VIDEO_AUDIO_TREBLE) | |
134 | ret |= SOUND_MASK_TREBLE; | |
135 | break; | |
136 | ||
137 | case MIXER_WRITE(SOUND_MIXER_VOLUME): | |
138 | left = mix_to_v4l(val); | |
139 | right = mix_to_v4l(val >> 8); | |
140 | va.volume = max(left,right); | |
141 | va.balance = (32768*min(left,right)) / (va.volume ? va.volume : 1); | |
142 | va.balance = (left<right) ? (65535-va.balance) : va.balance; | |
143 | if (va.volume) | |
144 | va.flags &= ~VIDEO_AUDIO_MUTE; | |
145 | client->driver->command(client,VIDIOCSAUDIO,&va); | |
146 | client->driver->command(client,VIDIOCGAUDIO,&va); | |
147 | /* fall throuth */ | |
148 | case MIXER_READ(SOUND_MIXER_VOLUME): | |
149 | left = (min(65536 - va.balance,32768) * | |
150 | va.volume) / 32768; | |
151 | right = (min(va.balance,(u16)32768) * | |
152 | va.volume) / 32768; | |
153 | ret = v4l_to_mix2(left,right); | |
154 | break; | |
155 | ||
156 | case MIXER_WRITE(SOUND_MIXER_BASS): | |
157 | va.bass = mix_to_v4l(val); | |
158 | client->driver->command(client,VIDIOCSAUDIO,&va); | |
159 | client->driver->command(client,VIDIOCGAUDIO,&va); | |
160 | /* fall throuth */ | |
161 | case MIXER_READ(SOUND_MIXER_BASS): | |
162 | ret = v4l_to_mix(va.bass); | |
163 | break; | |
164 | ||
165 | case MIXER_WRITE(SOUND_MIXER_TREBLE): | |
166 | va.treble = mix_to_v4l(val); | |
167 | client->driver->command(client,VIDIOCSAUDIO,&va); | |
168 | client->driver->command(client,VIDIOCGAUDIO,&va); | |
169 | /* fall throuth */ | |
170 | case MIXER_READ(SOUND_MIXER_TREBLE): | |
171 | ret = v4l_to_mix(va.treble); | |
172 | break; | |
173 | ||
174 | default: | |
175 | return -EINVAL; | |
176 | } | |
177 | if (put_user(ret, p)) | |
178 | return -EFAULT; | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static int tvmixer_open(struct inode *inode, struct file *file) | |
183 | { | |
4ac97914 MCC |
184 | int i, minor = iminor(inode); |
185 | struct TVMIXER *mix = NULL; | |
1da177e4 LT |
186 | struct i2c_client *client = NULL; |
187 | ||
188 | for (i = 0; i < DEV_MAX; i++) { | |
189 | if (devices[i].minor == minor) { | |
190 | mix = devices+i; | |
191 | client = mix->dev; | |
192 | break; | |
193 | } | |
194 | } | |
195 | ||
196 | if (NULL == client) | |
197 | return -ENODEV; | |
198 | ||
199 | /* lock bttv in memory while the mixer is in use */ | |
200 | file->private_data = mix; | |
1da177e4 LT |
201 | if (client->adapter->owner) |
202 | try_module_get(client->adapter->owner); | |
4ac97914 | 203 | return 0; |
1da177e4 LT |
204 | } |
205 | ||
206 | static int tvmixer_release(struct inode *inode, struct file *file) | |
207 | { | |
208 | struct TVMIXER *mix = file->private_data; | |
209 | struct i2c_client *client; | |
210 | ||
211 | client = mix->dev; | |
212 | if (NULL == client) { | |
213 | return -ENODEV; | |
214 | } | |
215 | ||
1da177e4 LT |
216 | if (client->adapter->owner) |
217 | module_put(client->adapter->owner); | |
218 | return 0; | |
219 | } | |
220 | ||
221 | static struct i2c_driver driver = { | |
604f28e2 | 222 | .driver = { |
cab462f7 | 223 | .name = "tvmixer", |
604f28e2 | 224 | }, |
4ac97914 | 225 | .id = I2C_DRIVERID_TVMIXER, |
4ac97914 | 226 | .detach_adapter = tvmixer_adapters, |
4ac97914 MCC |
227 | .attach_adapter = tvmixer_adapters, |
228 | .detach_client = tvmixer_clients, | |
1da177e4 LT |
229 | }; |
230 | ||
231 | static struct file_operations tvmixer_fops = { | |
232 | .owner = THIS_MODULE, | |
233 | .llseek = no_llseek, | |
234 | .ioctl = tvmixer_ioctl, | |
235 | .open = tvmixer_open, | |
236 | .release = tvmixer_release, | |
237 | }; | |
238 | ||
239 | /* ----------------------------------------------------------------------- */ | |
240 | ||
241 | static int tvmixer_adapters(struct i2c_adapter *adap) | |
242 | { | |
243 | struct list_head *item; | |
244 | struct i2c_client *client; | |
245 | ||
246 | list_for_each(item,&adap->clients) { | |
247 | client = list_entry(item, struct i2c_client, list); | |
248 | tvmixer_clients(client); | |
249 | } | |
250 | return 0; | |
251 | } | |
252 | ||
253 | static int tvmixer_clients(struct i2c_client *client) | |
254 | { | |
255 | struct video_audio va; | |
256 | int i,minor; | |
257 | ||
1da177e4 LT |
258 | if (!(client->adapter->class & I2C_CLASS_TV_ANALOG)) |
259 | return -1; | |
1da177e4 LT |
260 | |
261 | /* unregister ?? */ | |
262 | for (i = 0; i < DEV_MAX; i++) { | |
263 | if (devices[i].dev == client) { | |
264 | /* unregister */ | |
265 | unregister_sound_mixer(devices[i].minor); | |
266 | devices[i].dev = NULL; | |
267 | devices[i].minor = -1; | |
268 | printk("tvmixer: %s unregistered (#1)\n", | |
fae91e72 | 269 | client->name); |
1da177e4 LT |
270 | return 0; |
271 | } | |
272 | } | |
273 | ||
274 | /* look for a free slot */ | |
275 | for (i = 0; i < DEV_MAX; i++) | |
276 | if (NULL == devices[i].dev) | |
277 | break; | |
278 | if (i == DEV_MAX) { | |
279 | printk(KERN_WARNING "tvmixer: DEV_MAX too small\n"); | |
280 | return -1; | |
281 | } | |
282 | ||
283 | /* audio chip with mixer ??? */ | |
284 | if (NULL == client->driver->command) | |
285 | return -1; | |
286 | memset(&va,0,sizeof(va)); | |
287 | if (0 != client->driver->command(client,VIDIOCGAUDIO,&va)) | |
288 | return -1; | |
289 | if (0 == (va.flags & VIDEO_AUDIO_VOLUME)) | |
290 | return -1; | |
291 | ||
292 | /* everything is fine, register */ | |
293 | if ((minor = register_sound_mixer(&tvmixer_fops,devnr)) < 0) { | |
294 | printk(KERN_ERR "tvmixer: cannot allocate mixer device\n"); | |
295 | return -1; | |
296 | } | |
297 | ||
298 | devices[i].minor = minor; | |
299 | devices[i].count = 0; | |
300 | devices[i].dev = client; | |
301 | printk("tvmixer: %s (%s) registered with minor %d\n", | |
302 | client->name,client->adapter->name,minor); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | /* ----------------------------------------------------------------------- */ | |
308 | ||
309 | static int __init tvmixer_init_module(void) | |
310 | { | |
311 | int i; | |
312 | ||
313 | for (i = 0; i < DEV_MAX; i++) | |
314 | devices[i].minor = -1; | |
315 | ||
316 | return i2c_add_driver(&driver); | |
317 | } | |
318 | ||
319 | static void __exit tvmixer_cleanup_module(void) | |
320 | { | |
321 | int i; | |
322 | ||
323 | i2c_del_driver(&driver); | |
324 | for (i = 0; i < DEV_MAX; i++) { | |
325 | if (devices[i].minor != -1) { | |
326 | unregister_sound_mixer(devices[i].minor); | |
327 | printk("tvmixer: %s unregistered (#2)\n", | |
fae91e72 | 328 | devices[i].dev->name); |
1da177e4 LT |
329 | } |
330 | } | |
331 | } | |
332 | ||
333 | module_init(tvmixer_init_module); | |
334 | module_exit(tvmixer_cleanup_module); | |
335 | ||
336 | /* | |
337 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
338 | * --------------------------------------------------------------------------- | |
339 | * Local variables: | |
340 | * c-basic-offset: 8 | |
341 | * End: | |
342 | */ |