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1da177e4 LT |
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"); |