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Linux/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c

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  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 <linux/delay.h>
 24 #include <sound/core.h>
 25 #include <sound/asoundef.h>
 26 #include "pdaudiocf.h"
 27 
 28 
 29 /*
 30  * clear the SRAM contents
 31  */
 32 static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
 33 {
 34         int max_loop = 64 * 1024;
 35 
 36         while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
 37                 if (max_loop-- < 0)
 38                         return -EIO;
 39                 inw(chip->port + PDAUDIOCF_REG_MD);
 40         }
 41         return 0;
 42 }
 43 
 44 /*
 45  * pdacf_pcm_trigger - trigger callback for capture
 46  */
 47 static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
 48 {
 49         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 50         struct snd_pcm_runtime *runtime = subs->runtime;
 51         int inc, ret = 0, rate;
 52         unsigned short mask, val, tmp;
 53 
 54         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 55                 return -EBUSY;
 56 
 57         switch (cmd) {
 58         case SNDRV_PCM_TRIGGER_START:
 59                 chip->pcm_hwptr = 0;
 60                 chip->pcm_tdone = 0;
 61                 /* fall thru */
 62         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 63         case SNDRV_PCM_TRIGGER_RESUME:
 64                 mask = 0;
 65                 val = PDAUDIOCF_RECORD;
 66                 inc = 1;
 67                 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
 68                 break;
 69         case SNDRV_PCM_TRIGGER_STOP:
 70         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 71         case SNDRV_PCM_TRIGGER_SUSPEND:
 72                 mask = PDAUDIOCF_RECORD;
 73                 val = 0;
 74                 inc = -1;
 75                 rate = 0;
 76                 break;
 77         default:
 78                 return -EINVAL;
 79         }
 80         spin_lock(&chip->reg_lock);
 81         chip->pcm_running += inc;
 82         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 83         if (chip->pcm_running) {
 84                 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
 85                         chip->pcm_running -= inc;
 86                         ret = -EIO;
 87                         goto __end;
 88                 }
 89         }
 90         tmp &= ~mask;
 91         tmp |= val;
 92         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
 93       __end:
 94         spin_unlock(&chip->reg_lock);
 95         snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
 96         return ret;
 97 }
 98 
 99 /*
100  * pdacf_pcm_hw_params - hw_params callback for playback and capture
101  */
102 static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
103                                      struct snd_pcm_hw_params *hw_params)
104 {
105         return snd_pcm_lib_alloc_vmalloc_32_buffer
106                                         (subs, params_buffer_bytes(hw_params));
107 }
108 
109 /*
110  * pdacf_pcm_hw_free - hw_free callback for playback and capture
111  */
112 static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
113 {
114         return snd_pcm_lib_free_vmalloc_buffer(subs);
115 }
116 
117 /*
118  * pdacf_pcm_prepare - prepare callback for playback and capture
119  */
120 static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
121 {
122         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
123         struct snd_pcm_runtime *runtime = subs->runtime;
124         u16 val, nval, aval;
125 
126         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
127                 return -EBUSY;
128 
129         chip->pcm_channels = runtime->channels;
130 
131         chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
132 #ifdef SNDRV_LITTLE_ENDIAN
133         chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
134 #else
135         chip->pcm_swab = chip->pcm_little;
136 #endif
137 
138         if (snd_pcm_format_unsigned(runtime->format))
139                 chip->pcm_xor = 0x80008000;
140 
141         if (pdacf_pcm_clear_sram(chip) < 0)
142                 return -EIO;
143         
144         val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
145         nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
146         switch (runtime->format) {
147         case SNDRV_PCM_FORMAT_S16_LE:
148         case SNDRV_PCM_FORMAT_S16_BE:
149                 break;
150         default: /* 24-bit */
151                 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
152                 break;
153         }
154         aval = 0;
155         chip->pcm_sample = 4;
156         switch (runtime->format) {
157         case SNDRV_PCM_FORMAT_S16_LE:
158         case SNDRV_PCM_FORMAT_S16_BE:
159                 aval = AK4117_DIF_16R;
160                 chip->pcm_frame = 2;
161                 chip->pcm_sample = 2;
162                 break;
163         case SNDRV_PCM_FORMAT_S24_3LE:
164         case SNDRV_PCM_FORMAT_S24_3BE:
165                 chip->pcm_sample = 3;
166                 /* fall through */
167         default: /* 24-bit */
168                 aval = AK4117_DIF_24R;
169                 chip->pcm_frame = 3;
170                 chip->pcm_xor &= 0xffff0000;
171                 break;
172         }
173 
174         if (val != nval) {
175                 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
176                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
177         }
178 
179         val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
180         val &= ~(PDAUDIOCF_IRQLVLEN1);
181         val |= PDAUDIOCF_IRQLVLEN0;
182         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
183 
184         chip->pcm_size = runtime->buffer_size;
185         chip->pcm_period = runtime->period_size;
186         chip->pcm_area = runtime->dma_area;
187 
188         return 0;
189 }
190 
191 
192 /*
193  * capture hw information
194  */
195 
196 static struct snd_pcm_hardware pdacf_pcm_capture_hw = {
197         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
198                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
199                                  SNDRV_PCM_INFO_MMAP_VALID |
200                                  SNDRV_PCM_INFO_BATCH),
201         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
202                                 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
203                                 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
204         .rates =                SNDRV_PCM_RATE_32000 |
205                                 SNDRV_PCM_RATE_44100 |
206                                 SNDRV_PCM_RATE_48000 |
207                                 SNDRV_PCM_RATE_88200 |
208                                 SNDRV_PCM_RATE_96000 |
209                                 SNDRV_PCM_RATE_176400 |
210                                 SNDRV_PCM_RATE_192000,
211         .rate_min =             32000,
212         .rate_max =             192000,
213         .channels_min =         1,
214         .channels_max =         2,
215         .buffer_bytes_max =     (512*1024),
216         .period_bytes_min =     8*1024,
217         .period_bytes_max =     (64*1024),
218         .periods_min =          2,
219         .periods_max =          128,
220         .fifo_size =            0,
221 };
222 
223 
224 /*
225  * pdacf_pcm_capture_open - open callback for capture
226  */
227 static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
228 {
229         struct snd_pcm_runtime *runtime = subs->runtime;
230         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
231 
232         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
233                 return -EBUSY;
234 
235         runtime->hw = pdacf_pcm_capture_hw;
236         runtime->private_data = chip;
237         chip->pcm_substream = subs;
238 
239         return 0;
240 }
241 
242 /*
243  * pdacf_pcm_capture_close - close callback for capture
244  */
245 static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
246 {
247         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
248 
249         if (!chip)
250                 return -EINVAL;
251         pdacf_reinit(chip, 0);
252         chip->pcm_substream = NULL;
253         return 0;
254 }
255 
256 
257 /*
258  * pdacf_pcm_capture_pointer - pointer callback for capture
259  */
260 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
261 {
262         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
263         return chip->pcm_hwptr;
264 }
265 
266 /*
267  * operators for PCM capture
268  */
269 static struct snd_pcm_ops pdacf_pcm_capture_ops = {
270         .open =         pdacf_pcm_capture_open,
271         .close =        pdacf_pcm_capture_close,
272         .ioctl =        snd_pcm_lib_ioctl,
273         .hw_params =    pdacf_pcm_hw_params,
274         .hw_free =      pdacf_pcm_hw_free,
275         .prepare =      pdacf_pcm_prepare,
276         .trigger =      pdacf_pcm_trigger,
277         .pointer =      pdacf_pcm_capture_pointer,
278         .page =         snd_pcm_lib_get_vmalloc_page,
279         .mmap =         snd_pcm_lib_mmap_vmalloc,
280 };
281 
282 
283 /*
284  * snd_pdacf_pcm_new - create and initialize a pcm
285  */
286 int snd_pdacf_pcm_new(struct snd_pdacf *chip)
287 {
288         struct snd_pcm *pcm;
289         int err;
290 
291         err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
292         if (err < 0)
293                 return err;
294                 
295         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
296 
297         pcm->private_data = chip;
298         pcm->info_flags = 0;
299         strcpy(pcm->name, chip->card->shortname);
300         chip->pcm = pcm;
301         
302         err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
303         if (err < 0)
304                 return err;
305 
306         return 0;
307 }
308 

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