d54033ebd5e9686b19cd4dbadeada15d3e7846ff
[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@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(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(snd_pcm_substream_t *subs)
67 {
68         snd_pcm_runtime_t *runtime = subs->runtime;
69         if (runtime->dma_area) {
70                 vfree(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  * snd_pdacf_pcm_new - create and initialize a pcm
329  */
330 int snd_pdacf_pcm_new(pdacf_t *chip)
331 {
332         snd_pcm_t *pcm;
333         int err;
334
335         err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
336         if (err < 0)
337                 return err;
338                 
339         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
340
341         pcm->private_data = chip;
342         pcm->info_flags = 0;
343         strcpy(pcm->name, chip->card->shortname);
344         chip->pcm = pcm;
345         
346         err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
347         if (err < 0)
348                 return err;
349
350         return 0;
351 }