[PATCH] Kconfig fix (missing dependencies on PCI in sound/*)
[linux-2.6] / sound / oss / sh_dac_audio.c
1 #include <linux/config.h>
2 #include <linux/module.h>
3 #include <linux/init.h>
4 #include <linux/sched.h>
5 #include <linux/version.h>
6 #include <linux/linkage.h>
7 #include <linux/slab.h>
8 #include <linux/fs.h>
9 #include <linux/sound.h>
10 #include <linux/soundcard.h>
11 #include <asm/io.h>
12 #include <asm/uaccess.h>
13 #include <asm/irq.h>
14 #include <asm/delay.h>
15 #include <linux/interrupt.h>
16
17 #include <asm/cpu/dac.h>
18
19 #ifdef MACH_HP600
20 #include <asm/hp6xx/hp6xx.h>
21 #include <asm/hd64461/hd64461.h>
22 #endif
23
24 #define MODNAME "sh_dac_audio"
25
26 #define TMU_TOCR_INIT   0x00
27
28 #define TMU1_TCR_INIT   0x0020  /* Clock/4, rising edge; interrupt on */
29 #define TMU1_TSTR_INIT  0x02    /* Bit to turn on TMU1 */
30
31 #define TMU_TSTR        0xfffffe92
32 #define TMU1_TCOR       0xfffffea0
33 #define TMU1_TCNT       0xfffffea4
34 #define TMU1_TCR        0xfffffea8
35
36 #define BUFFER_SIZE 48000
37
38 static int rate;
39 static int empty;
40 static char *data_buffer, *buffer_begin, *buffer_end;
41 static int in_use, device_major;
42
43 static void dac_audio_start_timer(void)
44 {
45         u8 tstr;
46
47         tstr = ctrl_inb(TMU_TSTR);
48         tstr |= TMU1_TSTR_INIT;
49         ctrl_outb(tstr, TMU_TSTR);
50 }
51
52 static void dac_audio_stop_timer(void)
53 {
54         u8 tstr;
55
56         tstr = ctrl_inb(TMU_TSTR);
57         tstr &= ~TMU1_TSTR_INIT;
58         ctrl_outb(tstr, TMU_TSTR);
59 }
60
61 static void dac_audio_reset(void)
62 {
63         dac_audio_stop_timer();
64         buffer_begin = buffer_end = data_buffer;
65         empty = 1;
66 }
67
68 static void dac_audio_sync(void)
69 {
70         while (!empty)
71                 schedule();
72 }
73
74 static void dac_audio_start(void)
75 {
76 #ifdef MACH_HP600
77         u16 v;
78         v = inw(HD64461_GPADR);
79         v &= ~HD64461_GPADR_SPEAKER;
80         outw(v, HD64461_GPADR);
81 #endif
82         sh_dac_enable(CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
83         ctrl_outw(TMU1_TCR_INIT, TMU1_TCR);
84 }
85 static void dac_audio_stop(void)
86 {
87 #ifdef MACH_HP600
88         u16 v;
89 #endif
90         dac_audio_stop_timer();
91 #ifdef MACH_HP600
92         v = inw(HD64461_GPADR);
93         v |= HD64461_GPADR_SPEAKER;
94         outw(v, HD64461_GPADR);
95 #endif
96         sh_dac_disable(CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
97 }
98
99 static void dac_audio_set_rate(void)
100 {
101         unsigned long interval;
102
103         interval = (current_cpu_data.module_clock / 4) / rate;
104         ctrl_outl(interval, TMU1_TCOR);
105         ctrl_outl(interval, TMU1_TCNT);
106 }
107
108 static int dac_audio_ioctl(struct inode *inode, struct file *file,
109                            unsigned int cmd, unsigned long arg)
110 {
111         int val;
112
113         switch (cmd) {
114         case OSS_GETVERSION:
115                 return put_user(SOUND_VERSION, (int *)arg);
116
117         case SNDCTL_DSP_SYNC:
118                 dac_audio_sync();
119                 return 0;
120
121         case SNDCTL_DSP_RESET:
122                 dac_audio_reset();
123                 return 0;
124
125         case SNDCTL_DSP_GETFMTS:
126                 return put_user(AFMT_U8, (int *)arg);
127
128         case SNDCTL_DSP_SETFMT:
129                 return put_user(AFMT_U8, (int *)arg);
130
131         case SNDCTL_DSP_NONBLOCK:
132                 file->f_flags |= O_NONBLOCK;
133                 return 0;
134
135         case SNDCTL_DSP_GETCAPS:
136                 return 0;
137
138         case SOUND_PCM_WRITE_RATE:
139                 val = *(int *)arg;
140                 if (val > 0) {
141                         rate = val;
142                         dac_audio_set_rate();
143                 }
144                 return put_user(rate, (int *)arg);
145
146         case SNDCTL_DSP_STEREO:
147                 return put_user(0, (int *)arg);
148
149         case SOUND_PCM_WRITE_CHANNELS:
150                 return put_user(1, (int *)arg);
151
152         case SNDCTL_DSP_SETDUPLEX:
153                 return -EINVAL;
154
155         case SNDCTL_DSP_PROFILE:
156                 return -EINVAL;
157
158         case SNDCTL_DSP_GETBLKSIZE:
159                 return put_user(BUFFER_SIZE, (int *)arg);
160
161         case SNDCTL_DSP_SETFRAGMENT:
162                 return 0;
163
164         default:
165                 printk(KERN_ERR "sh_dac_audio: unimplemented ioctl=0x%x\n",
166                        cmd);
167                 return -EINVAL;
168         }
169         return -EINVAL;
170 }
171
172 static ssize_t dac_audio_write(struct file *file, const char *buf, size_t count,
173                                loff_t * ppos)
174 {
175         int free;
176         int nbytes;
177
178         if (count < 0)
179                 return -EINVAL;
180
181         if (!count) {
182                 dac_audio_sync();
183                 return 0;
184         }
185
186         free = buffer_begin - buffer_end;
187
188         if (free < 0)
189                 free += BUFFER_SIZE;
190         if ((free == 0) && (empty))
191                 free = BUFFER_SIZE;
192         if (count > free)
193                 count = free;
194         if (buffer_begin > buffer_end) {
195                 if (copy_from_user((void *)buffer_end, buf, count))
196                         return -EFAULT;
197
198                 buffer_end += count;
199         } else {
200                 nbytes = data_buffer + BUFFER_SIZE - buffer_end;
201                 if (nbytes > count) {
202                         if (copy_from_user((void *)buffer_end, buf, count))
203                                 return -EFAULT;
204                         buffer_end += count;
205                 } else {
206                         if (copy_from_user((void *)buffer_end, buf, nbytes))
207                                 return -EFAULT;
208                         if (copy_from_user
209                             ((void *)data_buffer, buf + nbytes, count - nbytes))
210                                 return -EFAULT;
211                         buffer_end = data_buffer + count - nbytes;
212                 }
213         }
214
215         if (empty) {
216                 empty = 0;
217                 dac_audio_start_timer();
218         }
219
220         return count;
221 }
222
223 static ssize_t dac_audio_read(struct file *file, char *buf, size_t count,
224                               loff_t * ppos)
225 {
226         return -EINVAL;
227 }
228
229 static int dac_audio_open(struct inode *inode, struct file *file)
230 {
231         if (file->f_mode & FMODE_READ)
232                 return -ENODEV;
233         if (in_use)
234                 return -EBUSY;
235
236         in_use = 1;
237
238         dac_audio_start();
239
240         return 0;
241 }
242
243 static int dac_audio_release(struct inode *inode, struct file *file)
244 {
245         dac_audio_sync();
246         dac_audio_stop();
247         in_use = 0;
248
249         return 0;
250 }
251
252 struct file_operations dac_audio_fops = {
253       .read =           dac_audio_read,
254       .write =  dac_audio_write,
255       .ioctl =  dac_audio_ioctl,
256       .open =           dac_audio_open,
257       .release =        dac_audio_release,
258 };
259
260 static irqreturn_t timer1_interrupt(int irq, void *dev, struct pt_regs *regs)
261 {
262         unsigned long timer_status;
263
264         timer_status = ctrl_inw(TMU1_TCR);
265         timer_status &= ~0x100;
266         ctrl_outw(timer_status, TMU1_TCR);
267
268         if (!empty) {
269                 sh_dac_output(*buffer_begin, CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
270                 buffer_begin++;
271
272                 if (buffer_begin == data_buffer + BUFFER_SIZE)
273                         buffer_begin = data_buffer;
274                 if (buffer_begin == buffer_end) {
275                         empty = 1;
276                         dac_audio_stop_timer();
277                 }
278         }
279         return IRQ_HANDLED;
280 }
281
282 static int __init dac_audio_init(void)
283 {
284         int retval;
285
286         if ((device_major = register_sound_dsp(&dac_audio_fops, -1)) < 0) {
287                 printk(KERN_ERR "Cannot register dsp device");
288                 return device_major;
289         }
290
291         in_use = 0;
292
293         data_buffer = (char *)kmalloc(BUFFER_SIZE, GFP_KERNEL);
294         if (data_buffer == NULL)
295                 return -ENOMEM;
296
297         dac_audio_reset();
298         rate = 8000;
299         dac_audio_set_rate();
300
301         retval =
302             request_irq(TIMER1_IRQ, timer1_interrupt, SA_INTERRUPT, MODNAME, 0);
303         if (retval < 0) {
304                 printk(KERN_ERR "sh_dac_audio: IRQ %d request failed\n",
305                        TIMER1_IRQ);
306                 return retval;
307         }
308
309         return 0;
310 }
311
312 static void __exit dac_audio_exit(void)
313 {
314         free_irq(TIMER1_IRQ, 0);
315
316         unregister_sound_dsp(device_major);
317         kfree((void *)data_buffer);
318 }
319
320 module_init(dac_audio_init);
321 module_exit(dac_audio_exit);
322
323 MODULE_AUTHOR("Andriy Skulysh, askulysh@image.kiev.ua");
324 MODULE_DESCRIPTION("SH DAC sound driver");
325 MODULE_LICENSE("GPL");