[ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz
[linux-2.6.git] / sound / pcmcia / pdaudiocf / pdaudiocf_pcm.c
1 /*
2  * Driver for Sound Core PDAudioCF soundcards
3  *
4  * PCM part
5  *
6  * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.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(struct snd_pcm_substream *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(struct snd_pcm_substream *subs, size_t size)
48 {
49         struct snd_pcm_runtime *runtime = subs->runtime;
50         if (runtime->dma_area) {
51                 if (runtime->dma_bytes >= size)
52                         return 0; /* already enough large */
53                 vfree(runtime->dma_area);
54         }
55         runtime->dma_area = vmalloc_32(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(struct snd_pcm_substream *subs)
67 {
68         struct snd_pcm_runtime *runtime = subs->runtime;
69
70         vfree(runtime->dma_area);
71         runtime->dma_area = NULL;
72         return 0;
73 }
74
75 /*
76  * clear the SRAM contents
77  */
78 static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
79 {
80         int max_loop = 64 * 1024;
81
82         while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
83                 if (max_loop-- < 0)
84                         return -EIO;
85                 inw(chip->port + PDAUDIOCF_REG_MD);
86         }
87         return 0;
88 }
89
90 /*
91  * pdacf_pcm_trigger - trigger callback for capture
92  */
93 static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
94 {
95         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
96         struct snd_pcm_runtime *runtime = subs->runtime;
97         int inc, ret = 0, rate;
98         unsigned short mask, val, tmp;
99
100         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
101                 return -EBUSY;
102
103         switch (cmd) {
104         case SNDRV_PCM_TRIGGER_START:
105                 chip->pcm_hwptr = 0;
106                 chip->pcm_tdone = 0;
107                 /* fall thru */
108         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
109         case SNDRV_PCM_TRIGGER_RESUME:
110                 mask = 0;
111                 val = PDAUDIOCF_RECORD;
112                 inc = 1;
113                 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
114                 break;
115         case SNDRV_PCM_TRIGGER_STOP:
116         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
117         case SNDRV_PCM_TRIGGER_SUSPEND:
118                 mask = PDAUDIOCF_RECORD;
119                 val = 0;
120                 inc = -1;
121                 rate = 0;
122                 break;
123         default:
124                 return -EINVAL;
125         }
126         spin_lock(&chip->reg_lock);
127         chip->pcm_running += inc;
128         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
129         if (chip->pcm_running) {
130                 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
131                         chip->pcm_running -= inc;
132                         ret = -EIO;
133                         goto __end;
134                 }
135         }
136         tmp &= ~mask;
137         tmp |= val;
138         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
139       __end:
140         spin_unlock(&chip->reg_lock);
141         snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
142         return ret;
143 }
144
145 /*
146  * pdacf_pcm_hw_params - hw_params callback for playback and capture
147  */
148 static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
149                                      struct snd_pcm_hw_params *hw_params)
150 {
151         return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
152 }
153
154 /*
155  * pdacf_pcm_hw_free - hw_free callback for playback and capture
156  */
157 static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
158 {
159         return snd_pcm_free_vmalloc_buffer(subs);
160 }
161
162 /*
163  * pdacf_pcm_prepare - prepare callback for playback and capture
164  */
165 static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
166 {
167         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
168         struct snd_pcm_runtime *runtime = subs->runtime;
169         u16 val, nval, aval;
170
171         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
172                 return -EBUSY;
173
174         chip->pcm_channels = runtime->channels;
175
176         chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
177 #ifdef SNDRV_LITTLE_ENDIAN
178         chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
179 #else
180         chip->pcm_swab = chip->pcm_little;
181 #endif
182
183         if (snd_pcm_format_unsigned(runtime->format))
184                 chip->pcm_xor = 0x80008000;
185
186         if (pdacf_pcm_clear_sram(chip) < 0)
187                 return -EIO;
188         
189         val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
190         nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
191         switch (runtime->format) {
192         case SNDRV_PCM_FORMAT_S16_LE:
193         case SNDRV_PCM_FORMAT_S16_BE:
194                 break;
195         default: /* 24-bit */
196                 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
197                 break;
198         }
199         aval = 0;
200         chip->pcm_sample = 4;
201         switch (runtime->format) {
202         case SNDRV_PCM_FORMAT_S16_LE:
203         case SNDRV_PCM_FORMAT_S16_BE:
204                 aval = AK4117_DIF_16R;
205                 chip->pcm_frame = 2;
206                 chip->pcm_sample = 2;
207                 break;
208         case SNDRV_PCM_FORMAT_S24_3LE:
209         case SNDRV_PCM_FORMAT_S24_3BE:
210                 chip->pcm_sample = 3;
211                 /* fall through */
212         default: /* 24-bit */
213                 aval = AK4117_DIF_24R;
214                 chip->pcm_frame = 3;
215                 chip->pcm_xor &= 0xffff0000;
216                 break;
217         }
218
219         if (val != nval) {
220                 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
221                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
222         }
223
224         val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
225         val &= ~(PDAUDIOCF_IRQLVLEN1);
226         val |= PDAUDIOCF_IRQLVLEN0;
227         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
228
229         chip->pcm_size = runtime->buffer_size;
230         chip->pcm_period = runtime->period_size;
231         chip->pcm_area = runtime->dma_area;
232
233         return 0;
234 }
235
236
237 /*
238  * capture hw information
239  */
240
241 static struct snd_pcm_hardware pdacf_pcm_capture_hw = {
242         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
243                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
244                                  SNDRV_PCM_INFO_MMAP_VALID),
245         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
246                                 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
247                                 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
248         .rates =                SNDRV_PCM_RATE_32000 |
249                                 SNDRV_PCM_RATE_44100 |
250                                 SNDRV_PCM_RATE_48000 |
251                                 SNDRV_PCM_RATE_88200 |
252                                 SNDRV_PCM_RATE_96000 |
253                                 SNDRV_PCM_RATE_176400 |
254                                 SNDRV_PCM_RATE_192000,
255         .rate_min =             32000,
256         .rate_max =             192000,
257         .channels_min =         1,
258         .channels_max =         2,
259         .buffer_bytes_max =     (512*1024),
260         .period_bytes_min =     8*1024,
261         .period_bytes_max =     (64*1024),
262         .periods_min =          2,
263         .periods_max =          128,
264         .fifo_size =            0,
265 };
266
267
268 /*
269  * pdacf_pcm_capture_open - open callback for capture
270  */
271 static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
272 {
273         struct snd_pcm_runtime *runtime = subs->runtime;
274         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
275
276         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
277                 return -EBUSY;
278
279         runtime->hw = pdacf_pcm_capture_hw;
280         runtime->private_data = chip;
281         chip->pcm_substream = subs;
282
283         return 0;
284 }
285
286 /*
287  * pdacf_pcm_capture_close - close callback for capture
288  */
289 static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
290 {
291         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
292
293         if (!chip)
294                 return -EINVAL;
295         pdacf_reinit(chip, 0);
296         chip->pcm_substream = NULL;
297         return 0;
298 }
299
300
301 /*
302  * pdacf_pcm_capture_pointer - pointer callback for capture
303  */
304 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
305 {
306         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
307         return chip->pcm_hwptr;
308 }
309
310 /*
311  * operators for PCM capture
312  */
313 static struct snd_pcm_ops pdacf_pcm_capture_ops = {
314         .open =         pdacf_pcm_capture_open,
315         .close =        pdacf_pcm_capture_close,
316         .ioctl =        snd_pcm_lib_ioctl,
317         .hw_params =    pdacf_pcm_hw_params,
318         .hw_free =      pdacf_pcm_hw_free,
319         .prepare =      pdacf_pcm_prepare,
320         .trigger =      pdacf_pcm_trigger,
321         .pointer =      pdacf_pcm_capture_pointer,
322         .page =         snd_pcm_get_vmalloc_page,
323 };
324
325
326 /*
327  * snd_pdacf_pcm_new - create and initialize a pcm
328  */
329 int snd_pdacf_pcm_new(struct snd_pdacf *chip)
330 {
331         struct snd_pcm *pcm;
332         int err;
333
334         err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
335         if (err < 0)
336                 return err;
337                 
338         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
339
340         pcm->private_data = chip;
341         pcm->info_flags = 0;
342         strcpy(pcm->name, chip->card->shortname);
343         chip->pcm = pcm;
344         
345         err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
346         if (err < 0)
347                 return err;
348
349         return 0;
350 }