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	mutex_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	mutex_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	pcm->nonatomic = true;
300	strcpy(pcm->name, chip->card->shortname);
301	chip->pcm = pcm;
302
303	err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
304	if (err < 0)
305		return err;
306
307	return 0;
308}
309