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[PATCH] w1: hotplug support.
[linux-2.6/verdex.git] / sound / pcmcia / pdaudiocf / pdaudiocf_pcm.c
blob0a954dc11b7396ec65d34797bcd496c6e7387936
1 /*
2 * Driver for Sound Core PDAudioCF soundcards
3 *
4 * PCM part
5 *
6 * Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #include <sound/driver.h>
24 #include <linux/slab.h>
25 #include <linux/vmalloc.h>
26 #include <linux/delay.h>
27 #include <sound/core.h>
28 #include <sound/asoundef.h>
29 #include "pdaudiocf.h"
30
31
32 /*
33 * we use a vmalloc'ed (sg-)buffer
34 */
35
36 /* get the physical page pointer on the given offset */
37 static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs, unsigned long offset)
38 {
39 void *pageptr = subs->runtime->dma_area + offset;
40 return vmalloc_to_page(pageptr);
41 }
42
43 /*
44 * hw_params callback
45 * NOTE: this may be called not only once per pcm open!
46 */
47 static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size)
48 {
49 snd_pcm_runtime_t *runtime = subs->runtime;
50 if (runtime->dma_area) {
51 if (runtime->dma_bytes >= size)
52 return 0; /* already enough large */
53 vfree_nocheck(runtime->dma_area);
54 }
55 runtime->dma_area = vmalloc_nocheck(size);
56 if (! runtime->dma_area)
57 return -ENOMEM;
58 runtime->dma_bytes = size;
59 return 0;
60 }
61
62 /*
63 * hw_free callback
64 * NOTE: this may be called not only once per pcm open!
65 */
66 static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs)
67 {
68 snd_pcm_runtime_t *runtime = subs->runtime;
69 if (runtime->dma_area) {
70 vfree_nocheck(runtime->dma_area);
71 runtime->dma_area = NULL;
72 }
73 return 0;
74 }
75
76 /*
77 * clear the SRAM contents
78 */
79 static int pdacf_pcm_clear_sram(pdacf_t *chip)
80 {
81 int max_loop = 64 * 1024;
82
83 while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
84 if (max_loop-- < 0)
85 return -EIO;
86 inw(chip->port + PDAUDIOCF_REG_MD);
87 }
88 return 0;
89 }
90
91 /*
92 * pdacf_pcm_trigger - trigger callback for capture
93 */
94 static int pdacf_pcm_trigger(snd_pcm_substream_t *subs, int cmd)
95 {
96 pdacf_t *chip = snd_pcm_substream_chip(subs);
97 snd_pcm_runtime_t *runtime = subs->runtime;
98 int inc, ret = 0, rate;
99 unsigned short mask, val, tmp;
100
101 if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
102 return -EBUSY;
103
104 switch (cmd) {
105 case SNDRV_PCM_TRIGGER_START:
106 chip->pcm_hwptr = 0;
107 chip->pcm_tdone = 0;
108 /* fall thru */
109 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
110 case SNDRV_PCM_TRIGGER_RESUME:
111 mask = 0;
112 val = PDAUDIOCF_RECORD;
113 inc = 1;
114 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
115 break;
116 case SNDRV_PCM_TRIGGER_STOP:
117 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
118 case SNDRV_PCM_TRIGGER_SUSPEND:
119 mask = PDAUDIOCF_RECORD;
120 val = 0;
121 inc = -1;
122 rate = 0;
123 break;
124 default:
125 return -EINVAL;
126 }
127 spin_lock(&chip->reg_lock);
128 chip->pcm_running += inc;
129 tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
130 if (chip->pcm_running) {
131 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
132 chip->pcm_running -= inc;
133 ret = -EIO;
134 goto __end;
135 }
136 }
137 tmp &= ~mask;
138 tmp |= val;
139 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
140 __end:
141 spin_unlock(&chip->reg_lock);
142 snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
143 return ret;
144 }
145
146 /*
147 * pdacf_pcm_hw_params - hw_params callback for playback and capture
148 */
149 static int pdacf_pcm_hw_params(snd_pcm_substream_t *subs,
150 snd_pcm_hw_params_t *hw_params)
151 {
152 return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
153 }
154
155 /*
156 * pdacf_pcm_hw_free - hw_free callback for playback and capture
157 */
158 static int pdacf_pcm_hw_free(snd_pcm_substream_t *subs)
159 {
160 return snd_pcm_free_vmalloc_buffer(subs);
161 }
162
163 /*
164 * pdacf_pcm_prepare - prepare callback for playback and capture
165 */
166 static int pdacf_pcm_prepare(snd_pcm_substream_t *subs)
167 {
168 pdacf_t *chip = snd_pcm_substream_chip(subs);
169 snd_pcm_runtime_t *runtime = subs->runtime;
170 u16 val, nval, aval;
171
172 if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
173 return -EBUSY;
174
175 chip->pcm_channels = runtime->channels;
176
177 chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
178 #ifdef SNDRV_LITTLE_ENDIAN
179 chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
180 #else
181 chip->pcm_swab = chip->pcm_little;
182 #endif
183
184 if (snd_pcm_format_unsigned(runtime->format))
185 chip->pcm_xor = 0x80008000;
186
187 if (pdacf_pcm_clear_sram(chip) < 0)
188 return -EIO;
189
190 val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
191 nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
192 switch (runtime->format) {
193 case SNDRV_PCM_FORMAT_S16_LE:
194 case SNDRV_PCM_FORMAT_S16_BE:
195 break;
196 default: /* 24-bit */
197 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
198 break;
199 }
200 aval = 0;
201 chip->pcm_sample = 4;
202 switch (runtime->format) {
203 case SNDRV_PCM_FORMAT_S16_LE:
204 case SNDRV_PCM_FORMAT_S16_BE:
205 aval = AK4117_DIF_16R;
206 chip->pcm_frame = 2;
207 chip->pcm_sample = 2;
208 break;
209 case SNDRV_PCM_FORMAT_S24_3LE:
210 case SNDRV_PCM_FORMAT_S24_3BE:
211 chip->pcm_sample = 3;
212 /* fall trough */
213 default: /* 24-bit */
214 aval = AK4117_DIF_24R;
215 chip->pcm_frame = 3;
216 chip->pcm_xor &= 0xffff0000;
217 break;
218 }
219
220 if (val != nval) {
221 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
222 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
223 }
224
225 val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER);
226 val &= ~(PDAUDIOCF_IRQLVLEN1);
227 val |= PDAUDIOCF_IRQLVLEN0;
228 pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
229
230 chip->pcm_size = runtime->buffer_size;
231 chip->pcm_period = runtime->period_size;
232 chip->pcm_area = runtime->dma_area;
233
234 return 0;
235 }
236
237
238 /*
239 * capture hw information
240 */
241
242 static snd_pcm_hardware_t pdacf_pcm_capture_hw = {
243 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
244 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
245 SNDRV_PCM_INFO_MMAP_VALID),
246 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
247 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
248 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
249 .rates = SNDRV_PCM_RATE_32000 |
250 SNDRV_PCM_RATE_44100 |
251 SNDRV_PCM_RATE_48000 |
252 SNDRV_PCM_RATE_88200 |
253 SNDRV_PCM_RATE_96000 |
254 SNDRV_PCM_RATE_176400 |
255 SNDRV_PCM_RATE_192000,
256 .rate_min = 32000,
257 .rate_max = 192000,
258 .channels_min = 1,
259 .channels_max = 2,
260 .buffer_bytes_max = (512*1024),
261 .period_bytes_min = 8*1024,
262 .period_bytes_max = (64*1024),
263 .periods_min = 2,
264 .periods_max = 128,
265 .fifo_size = 0,
266 };
267
268
269 /*
270 * pdacf_pcm_capture_open - open callback for capture
271 */
272 static int pdacf_pcm_capture_open(snd_pcm_substream_t *subs)
273 {
274 snd_pcm_runtime_t *runtime = subs->runtime;
275 pdacf_t *chip = snd_pcm_substream_chip(subs);
276
277 if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
278 return -EBUSY;
279
280 runtime->hw = pdacf_pcm_capture_hw;
281 runtime->private_data = chip;
282 chip->pcm_substream = subs;
283
284 return 0;
285 }
286
287 /*
288 * pdacf_pcm_capture_close - close callback for capture
289 */
290 static int pdacf_pcm_capture_close(snd_pcm_substream_t *subs)
291 {
292 pdacf_t *chip = snd_pcm_substream_chip(subs);
293
294 if (!chip)
295 return -EINVAL;
296 pdacf_reinit(chip, 0);
297 chip->pcm_substream = NULL;
298 return 0;
299 }
300
301
302 /*
303 * pdacf_pcm_capture_pointer - pointer callback for capture
304 */
305 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(snd_pcm_substream_t *subs)
306 {
307 pdacf_t *chip = snd_pcm_substream_chip(subs);
308 return chip->pcm_hwptr;
309 }
310
311 /*
312 * operators for PCM capture
313 */
314 static snd_pcm_ops_t pdacf_pcm_capture_ops = {
315 .open = pdacf_pcm_capture_open,
316 .close = pdacf_pcm_capture_close,
317 .ioctl = snd_pcm_lib_ioctl,
318 .hw_params = pdacf_pcm_hw_params,
319 .hw_free = pdacf_pcm_hw_free,
320 .prepare = pdacf_pcm_prepare,
321 .trigger = pdacf_pcm_trigger,
322 .pointer = pdacf_pcm_capture_pointer,
323 .page = snd_pcm_get_vmalloc_page,
324 };
325
326
327 /*
328 * free callback for pcm
329 */
330 static void snd_pdacf_pcm_free(snd_pcm_t *pcm)
331 {
332 pdacf_t *chip = pcm->private_data;
333 chip->pcm = NULL;
334 }
335
336 /*
337 * snd_pdacf_pcm_new - create and initialize a pcm
338 */
339 int snd_pdacf_pcm_new(pdacf_t *chip)
340 {
341 snd_pcm_t *pcm;
342 int err;
343
344 err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
345 if (err < 0)
346 return err;
347
348 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
349
350 pcm->private_data = chip;
351 pcm->private_free = snd_pdacf_pcm_free;
352 pcm->info_flags = 0;
353 strcpy(pcm->name, chip->card->shortname);
354 chip->pcm = pcm;
355
356 err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
357 if (err < 0)
358 return err;
359
360 return 0;
361 }
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