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 	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  */
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 const 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 const 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 };
280 
281 
282 /*
283  * snd_pdacf_pcm_new - create and initialize a pcm
284  */
285 int snd_pdacf_pcm_new(struct snd_pdacf *chip)
286 {
287 	struct snd_pcm *pcm;
288 	int err;
289 
290 	err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
291 	if (err < 0)
292 		return err;
293 
294 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
295 
296 	pcm->private_data = chip;
297 	pcm->info_flags = 0;
298 	pcm->nonatomic = true;
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