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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 */
32static 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 */
47static 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 */
102static 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 */
112static 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 */
120static 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
196static 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 */
227static 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 */
245static 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 */
260static 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 */
269static 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 */
286int 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}