1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Driver for Sound Core PDAudioCF soundcards
4 *
5 * PCM part
6 *
7 * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
8 */
9
10 #include <linux/delay.h>
11 #include <sound/core.h>
12 #include <sound/asoundef.h>
13 #include "pdaudiocf.h"
14
15
16 /*
17 * clear the SRAM contents
18 */
19 static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
20 {
21 int max_loop = 64 * 1024;
22
23 while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
24 if (max_loop-- < 0)
25 return -EIO;
26 inw(chip->port + PDAUDIOCF_REG_MD);
27 }
28 return 0;
29 }
30
31 /*
32 * pdacf_pcm_trigger - trigger callback for capture
33 */
34 static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
35 {
36 struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
37 struct snd_pcm_runtime *runtime = subs->runtime;
38 int inc, ret = 0, rate;
39 unsigned short mask, val, tmp;
40
41 if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
42 return -EBUSY;
43
44 switch (cmd) {
45 case SNDRV_PCM_TRIGGER_START:
46 chip->pcm_hwptr = 0;
47 chip->pcm_tdone = 0;
48 fallthrough;
49 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
50 case SNDRV_PCM_TRIGGER_RESUME:
51 mask = 0;
52 val = PDAUDIOCF_RECORD;
53 inc = 1;
54 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
55 break;
56 case SNDRV_PCM_TRIGGER_STOP:
57 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
58 case SNDRV_PCM_TRIGGER_SUSPEND:
59 mask = PDAUDIOCF_RECORD;
60 val = 0;
61 inc = -1;
62 rate = 0;
63 break;
64 default:
65 return -EINVAL;
66 }
67 mutex_lock(&chip->reg_lock);
68 chip->pcm_running += inc;
69 tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
70 if (chip->pcm_running) {
71 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
72 chip->pcm_running -= inc;
73 ret = -EIO;
74 goto __end;
75 }
76 }
77 tmp &= ~mask;
78 tmp |= val;
79 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
80 __end:
81 mutex_unlock(&chip->reg_lock);
82 snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
83 return ret;
84 }
85
86 /*
87 * pdacf_pcm_prepare - prepare callback for playback and capture
88 */
89 static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
90 {
91 struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
92 struct snd_pcm_runtime *runtime = subs->runtime;
93 u16 val, nval, aval;
94
95 if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
96 return -EBUSY;
97
98 chip->pcm_channels = runtime->channels;
99
100 chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
101 #ifdef SNDRV_LITTLE_ENDIAN
102 chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
103 #else
104 chip->pcm_swab = chip->pcm_little;
105 #endif
106
107 if (snd_pcm_format_unsigned(runtime->format))
108 chip->pcm_xor = 0x80008000;
109
110 if (pdacf_pcm_clear_sram(chip) < 0)
111 return -EIO;
112
113 val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
114 nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
115 switch (runtime->format) {
116 case SNDRV_PCM_FORMAT_S16_LE:
117 case SNDRV_PCM_FORMAT_S16_BE:
118 break;
119 default: /* 24-bit */
120 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
121 break;
122 }
123 aval = 0;
124 chip->pcm_sample = 4;
125 switch (runtime->format) {
126 case SNDRV_PCM_FORMAT_S16_LE:
127 case SNDRV_PCM_FORMAT_S16_BE:
128 aval = AK4117_DIF_16R;
129 chip->pcm_frame = 2;
130 chip->pcm_sample = 2;
131 break;
132 case SNDRV_PCM_FORMAT_S24_3LE:
133 case SNDRV_PCM_FORMAT_S24_3BE:
134 chip->pcm_sample = 3;
135 fallthrough;
136 default: /* 24-bit */
137 aval = AK4117_DIF_24R;
138 chip->pcm_frame = 3;
139 chip->pcm_xor &= 0xffff0000;
140 break;
141 }
142
143 if (val != nval) {
144 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
145 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
146 }
147
148 val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER);
149 val &= ~(PDAUDIOCF_IRQLVLEN1);
150 val |= PDAUDIOCF_IRQLVLEN0;
151 pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
152
153 chip->pcm_size = runtime->buffer_size;
154 chip->pcm_period = runtime->period_size;
155 chip->pcm_area = runtime->dma_area;
156
157 return 0;
158 }
159
160
161 /*
162 * capture hw information
163 */
164
165 static const struct snd_pcm_hardware pdacf_pcm_capture_hw = {
166 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
167 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
168 SNDRV_PCM_INFO_MMAP_VALID |
169 SNDRV_PCM_INFO_BATCH),
170 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
171 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
172 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
173 .rates = SNDRV_PCM_RATE_32000 |
174 SNDRV_PCM_RATE_44100 |
175 SNDRV_PCM_RATE_48000 |
176 SNDRV_PCM_RATE_88200 |
177 SNDRV_PCM_RATE_96000 |
178 SNDRV_PCM_RATE_176400 |
179 SNDRV_PCM_RATE_192000,
180 .rate_min = 32000,
181 .rate_max = 192000,
182 .channels_min = 1,
183 .channels_max = 2,
184 .buffer_bytes_max = (512*1024),
185 .period_bytes_min = 8*1024,
186 .period_bytes_max = (64*1024),
187 .periods_min = 2,
188 .periods_max = 128,
189 .fifo_size = 0,
190 };
191
192
193 /*
194 * pdacf_pcm_capture_open - open callback for capture
195 */
196 static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
197 {
198 struct snd_pcm_runtime *runtime = subs->runtime;
199 struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
200
201 if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
202 return -EBUSY;
203
204 runtime->hw = pdacf_pcm_capture_hw;
205 runtime->private_data = chip;
206 chip->pcm_substream = subs;
207
208 return 0;
209 }
210
211 /*
212 * pdacf_pcm_capture_close - close callback for capture
213 */
214 static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
215 {
216 struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
217
218 if (!chip)
219 return -EINVAL;
220 pdacf_reinit(chip, 0);
221 chip->pcm_substream = NULL;
222 return 0;
223 }
224
225
226 /*
227 * pdacf_pcm_capture_pointer - pointer callback for capture
228 */
229 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
230 {
231 struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
232 return chip->pcm_hwptr;
233 }
234
235 /*
236 * operators for PCM capture
237 */
238 static const struct snd_pcm_ops pdacf_pcm_capture_ops = {
239 .open = pdacf_pcm_capture_open,
240 .close = pdacf_pcm_capture_close,
241 .prepare = pdacf_pcm_prepare,
242 .trigger = pdacf_pcm_trigger,
243 .pointer = pdacf_pcm_capture_pointer,
244 };
245
246
247 /*
248 * snd_pdacf_pcm_new - create and initialize a pcm
249 */
250 int snd_pdacf_pcm_new(struct snd_pdacf *chip)
251 {
252 struct snd_pcm *pcm;
253 int err;
254
255 err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
256 if (err < 0)
257 return err;
258
259 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
260 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL,
261 0, 0);
262
263 pcm->private_data = chip;
264 pcm->info_flags = 0;
265 pcm->nonatomic = true;
266 strcpy(pcm->name, chip->card->shortname);
267 chip->pcm = pcm;
268
269 err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
270 if (err < 0)
271 return err;
272
273 return 0;
274 }
275
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