1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* 2 /*
3 * atmel-pcm.c -- ALSA PCM interface for the 3 * atmel-pcm.c -- ALSA PCM interface for the Atmel atmel SoC.
4 * 4 *
5 * Copyright (C) 2005 SAN People 5 * Copyright (C) 2005 SAN People
6 * Copyright (C) 2008 Atmel 6 * Copyright (C) 2008 Atmel
7 * 7 *
8 * Authors: Sedji Gaouaou <sedji.gaouaou@atmel 8 * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
9 * 9 *
10 * Based on at91-pcm. by: 10 * Based on at91-pcm. by:
11 * Frank Mandarino <fmandarino@endrelia.com> 11 * Frank Mandarino <fmandarino@endrelia.com>
12 * Copyright 2006 Endrelia Technologies Inc. 12 * Copyright 2006 Endrelia Technologies Inc.
13 * 13 *
14 * Based on pxa2xx-pcm.c by: 14 * Based on pxa2xx-pcm.c by:
15 * 15 *
16 * Author: Nicolas Pitre 16 * Author: Nicolas Pitre
17 * Created: Nov 30, 2004 17 * Created: Nov 30, 2004
18 * Copyright: (C) 2004 MontaVista Software, 18 * Copyright: (C) 2004 MontaVista Software, Inc.
19 */ 19 */
20 20
21 #include <linux/module.h> 21 #include <linux/module.h>
22 #include <linux/init.h> 22 #include <linux/init.h>
23 #include <linux/platform_device.h> 23 #include <linux/platform_device.h>
24 #include <linux/slab.h> 24 #include <linux/slab.h>
25 #include <linux/dma-mapping.h> 25 #include <linux/dma-mapping.h>
26 #include <linux/atmel_pdc.h> 26 #include <linux/atmel_pdc.h>
27 #include <linux/atmel-ssc.h> 27 #include <linux/atmel-ssc.h>
28 28
29 #include <sound/core.h> 29 #include <sound/core.h>
30 #include <sound/pcm.h> 30 #include <sound/pcm.h>
31 #include <sound/pcm_params.h> 31 #include <sound/pcm_params.h>
32 #include <sound/soc.h> 32 #include <sound/soc.h>
33 33
34 #include "atmel-pcm.h" 34 #include "atmel-pcm.h"
35 35
36 36
37 static int atmel_pcm_new(struct snd_soc_compon 37 static int atmel_pcm_new(struct snd_soc_component *component,
38 struct snd_soc_pcm_ru 38 struct snd_soc_pcm_runtime *rtd)
39 { 39 {
40 struct snd_card *card = rtd->card->snd 40 struct snd_card *card = rtd->card->snd_card;
41 int ret; 41 int ret;
42 42
43 ret = dma_coerce_mask_and_coherent(car 43 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
44 if (ret) 44 if (ret)
45 return ret; 45 return ret;
46 46
47 snd_pcm_set_managed_buffer_all(rtd->pc 47 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
48 card->d 48 card->dev, ATMEL_SSC_DMABUF_SIZE,
49 ATMEL_S 49 ATMEL_SSC_DMABUF_SIZE);
50 50
51 return 0; 51 return 0;
52 } 52 }
53 53
54 /*-------------------------------------------- 54 /*--------------------------------------------------------------------------*\
55 * Hardware definition 55 * Hardware definition
56 \*-------------------------------------------- 56 \*--------------------------------------------------------------------------*/
57 /* TODO: These values were taken from the AT91 57 /* TODO: These values were taken from the AT91 platform driver, check
58 * them against real values for AT32 58 * them against real values for AT32
59 */ 59 */
60 static const struct snd_pcm_hardware atmel_pcm 60 static const struct snd_pcm_hardware atmel_pcm_hardware = {
61 .info = SNDRV_PCM_IN 61 .info = SNDRV_PCM_INFO_MMAP |
62 SNDRV_PCM_IN 62 SNDRV_PCM_INFO_MMAP_VALID |
63 SNDRV_PCM_IN 63 SNDRV_PCM_INFO_INTERLEAVED |
64 SNDRV_PCM_IN 64 SNDRV_PCM_INFO_PAUSE,
65 .period_bytes_min = 32, 65 .period_bytes_min = 32,
66 .period_bytes_max = 8192, 66 .period_bytes_max = 8192,
67 .periods_min = 2, 67 .periods_min = 2,
68 .periods_max = 1024, 68 .periods_max = 1024,
69 .buffer_bytes_max = ATMEL_SSC_DM 69 .buffer_bytes_max = ATMEL_SSC_DMABUF_SIZE,
70 }; 70 };
71 71
72 72
73 /*-------------------------------------------- 73 /*--------------------------------------------------------------------------*\
74 * Data types 74 * Data types
75 \*-------------------------------------------- 75 \*--------------------------------------------------------------------------*/
76 struct atmel_runtime_data { 76 struct atmel_runtime_data {
77 struct atmel_pcm_dma_params *params; 77 struct atmel_pcm_dma_params *params;
78 dma_addr_t dma_buffer; /* phy 78 dma_addr_t dma_buffer; /* physical address of dma buffer */
79 dma_addr_t dma_buffer_end; /* fir 79 dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
80 size_t period_size; 80 size_t period_size;
81 81
82 dma_addr_t period_ptr; /* phy 82 dma_addr_t period_ptr; /* physical address of next period */
83 }; 83 };
84 84
85 /*-------------------------------------------- 85 /*--------------------------------------------------------------------------*\
86 * ISR 86 * ISR
87 \*-------------------------------------------- 87 \*--------------------------------------------------------------------------*/
88 static void atmel_pcm_dma_irq(u32 ssc_sr, 88 static void atmel_pcm_dma_irq(u32 ssc_sr,
89 struct snd_pcm_substream *substream) 89 struct snd_pcm_substream *substream)
90 { 90 {
91 struct atmel_runtime_data *prtd = subs 91 struct atmel_runtime_data *prtd = substream->runtime->private_data;
92 struct atmel_pcm_dma_params *params = 92 struct atmel_pcm_dma_params *params = prtd->params;
93 static int count; 93 static int count;
94 94
95 count++; 95 count++;
96 96
97 if (ssc_sr & params->mask->ssc_endbuf) 97 if (ssc_sr & params->mask->ssc_endbuf) {
98 pr_warn("atmel-pcm: buffer %s 98 pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
99 substream->str 99 substream->stream == SNDRV_PCM_STREAM_PLAYBACK
100 ? "underrun" : 100 ? "underrun" : "overrun",
101 params->name, 101 params->name, ssc_sr, count);
102 102
103 /* re-start the PDC */ 103 /* re-start the PDC */
104 ssc_writex(params->ssc->regs, 104 ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
105 params->mask->pdc_d 105 params->mask->pdc_disable);
106 prtd->period_ptr += prtd->peri 106 prtd->period_ptr += prtd->period_size;
107 if (prtd->period_ptr >= prtd-> 107 if (prtd->period_ptr >= prtd->dma_buffer_end)
108 prtd->period_ptr = prt 108 prtd->period_ptr = prtd->dma_buffer;
109 109
110 ssc_writex(params->ssc->regs, 110 ssc_writex(params->ssc->regs, params->pdc->xpr,
111 prtd->period_ptr); 111 prtd->period_ptr);
112 ssc_writex(params->ssc->regs, 112 ssc_writex(params->ssc->regs, params->pdc->xcr,
113 prtd->period_size / 113 prtd->period_size / params->pdc_xfer_size);
114 ssc_writex(params->ssc->regs, 114 ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
115 params->mask->pdc_e 115 params->mask->pdc_enable);
116 } 116 }
117 117
118 if (ssc_sr & params->mask->ssc_endx) { 118 if (ssc_sr & params->mask->ssc_endx) {
119 /* Load the PDC next pointer a 119 /* Load the PDC next pointer and counter registers */
120 prtd->period_ptr += prtd->peri 120 prtd->period_ptr += prtd->period_size;
121 if (prtd->period_ptr >= prtd-> 121 if (prtd->period_ptr >= prtd->dma_buffer_end)
122 prtd->period_ptr = prt 122 prtd->period_ptr = prtd->dma_buffer;
123 123
124 ssc_writex(params->ssc->regs, 124 ssc_writex(params->ssc->regs, params->pdc->xnpr,
125 prtd->period_ptr); 125 prtd->period_ptr);
126 ssc_writex(params->ssc->regs, 126 ssc_writex(params->ssc->regs, params->pdc->xncr,
127 prtd->period_size / 127 prtd->period_size / params->pdc_xfer_size);
128 } 128 }
129 129
130 snd_pcm_period_elapsed(substream); 130 snd_pcm_period_elapsed(substream);
131 } 131 }
132 132
133 133
134 /*-------------------------------------------- 134 /*--------------------------------------------------------------------------*\
135 * PCM operations 135 * PCM operations
136 \*-------------------------------------------- 136 \*--------------------------------------------------------------------------*/
137 static int atmel_pcm_hw_params(struct snd_soc_ 137 static int atmel_pcm_hw_params(struct snd_soc_component *component,
138 struct snd_pcm_ 138 struct snd_pcm_substream *substream,
139 struct snd_pcm_ 139 struct snd_pcm_hw_params *params)
140 { 140 {
141 struct snd_pcm_runtime *runtime = subs 141 struct snd_pcm_runtime *runtime = substream->runtime;
142 struct atmel_runtime_data *prtd = runt 142 struct atmel_runtime_data *prtd = runtime->private_data;
143 struct snd_soc_pcm_runtime *rtd = snd_ !! 143 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
144 144
145 /* this may get called several times b 145 /* this may get called several times by oss emulation
146 * with different params */ 146 * with different params */
147 147
148 prtd->params = snd_soc_dai_get_dma_dat !! 148 prtd->params = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
149 prtd->params->dma_intr_handler = atmel 149 prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
150 150
151 prtd->dma_buffer = runtime->dma_addr; 151 prtd->dma_buffer = runtime->dma_addr;
152 prtd->dma_buffer_end = runtime->dma_ad 152 prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
153 prtd->period_size = params_period_byte 153 prtd->period_size = params_period_bytes(params);
154 154
155 pr_debug("atmel-pcm: " 155 pr_debug("atmel-pcm: "
156 "hw_params: DMA for %s initial 156 "hw_params: DMA for %s initialized "
157 "(dma_bytes=%zu, period_size=% 157 "(dma_bytes=%zu, period_size=%zu)\n",
158 prtd->params->name, 158 prtd->params->name,
159 runtime->dma_bytes, 159 runtime->dma_bytes,
160 prtd->period_size); 160 prtd->period_size);
161 return 0; 161 return 0;
162 } 162 }
163 163
164 static int atmel_pcm_hw_free(struct snd_soc_co 164 static int atmel_pcm_hw_free(struct snd_soc_component *component,
165 struct snd_pcm_su 165 struct snd_pcm_substream *substream)
166 { 166 {
167 struct atmel_runtime_data *prtd = subs 167 struct atmel_runtime_data *prtd = substream->runtime->private_data;
168 struct atmel_pcm_dma_params *params = 168 struct atmel_pcm_dma_params *params = prtd->params;
169 169
170 if (params != NULL) { 170 if (params != NULL) {
171 ssc_writex(params->ssc->regs, 171 ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
172 params->mask->pdc_d 172 params->mask->pdc_disable);
173 prtd->params->dma_intr_handler 173 prtd->params->dma_intr_handler = NULL;
174 } 174 }
175 175
176 return 0; 176 return 0;
177 } 177 }
178 178
179 static int atmel_pcm_prepare(struct snd_soc_co 179 static int atmel_pcm_prepare(struct snd_soc_component *component,
180 struct snd_pcm_su 180 struct snd_pcm_substream *substream)
181 { 181 {
182 struct atmel_runtime_data *prtd = subs 182 struct atmel_runtime_data *prtd = substream->runtime->private_data;
183 struct atmel_pcm_dma_params *params = 183 struct atmel_pcm_dma_params *params = prtd->params;
184 184
185 ssc_writex(params->ssc->regs, SSC_IDR, 185 ssc_writex(params->ssc->regs, SSC_IDR,
186 params->mask->ssc_endx | pa 186 params->mask->ssc_endx | params->mask->ssc_endbuf);
187 ssc_writex(params->ssc->regs, ATMEL_PD 187 ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
188 params->mask->pdc_disable); 188 params->mask->pdc_disable);
189 return 0; 189 return 0;
190 } 190 }
191 191
192 static int atmel_pcm_trigger(struct snd_soc_co 192 static int atmel_pcm_trigger(struct snd_soc_component *component,
193 struct snd_pcm_su 193 struct snd_pcm_substream *substream, int cmd)
194 { 194 {
195 struct snd_pcm_runtime *rtd = substrea 195 struct snd_pcm_runtime *rtd = substream->runtime;
196 struct atmel_runtime_data *prtd = rtd- 196 struct atmel_runtime_data *prtd = rtd->private_data;
197 struct atmel_pcm_dma_params *params = 197 struct atmel_pcm_dma_params *params = prtd->params;
198 int ret = 0; 198 int ret = 0;
199 199
200 pr_debug("atmel-pcm:buffer_size = %ld, 200 pr_debug("atmel-pcm:buffer_size = %ld,"
201 "dma_area = %p, dma_bytes = %z 201 "dma_area = %p, dma_bytes = %zu\n",
202 rtd->buffer_size, rtd->dma_are 202 rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
203 203
204 switch (cmd) { 204 switch (cmd) {
205 case SNDRV_PCM_TRIGGER_START: 205 case SNDRV_PCM_TRIGGER_START:
206 prtd->period_ptr = prtd->dma_b 206 prtd->period_ptr = prtd->dma_buffer;
207 207
208 ssc_writex(params->ssc->regs, 208 ssc_writex(params->ssc->regs, params->pdc->xpr,
209 prtd->period_ptr); 209 prtd->period_ptr);
210 ssc_writex(params->ssc->regs, 210 ssc_writex(params->ssc->regs, params->pdc->xcr,
211 prtd->period_size / 211 prtd->period_size / params->pdc_xfer_size);
212 212
213 prtd->period_ptr += prtd->peri 213 prtd->period_ptr += prtd->period_size;
214 ssc_writex(params->ssc->regs, 214 ssc_writex(params->ssc->regs, params->pdc->xnpr,
215 prtd->period_ptr); 215 prtd->period_ptr);
216 ssc_writex(params->ssc->regs, 216 ssc_writex(params->ssc->regs, params->pdc->xncr,
217 prtd->period_size / 217 prtd->period_size / params->pdc_xfer_size);
218 218
219 pr_debug("atmel-pcm: trigger: 219 pr_debug("atmel-pcm: trigger: "
220 "period_ptr=%lx, xpr=% 220 "period_ptr=%lx, xpr=%u, "
221 "xcr=%u, xnpr=%u, xncr 221 "xcr=%u, xnpr=%u, xncr=%u\n",
222 (unsigned long)prtd->p 222 (unsigned long)prtd->period_ptr,
223 ssc_readx(params->ssc- 223 ssc_readx(params->ssc->regs, params->pdc->xpr),
224 ssc_readx(params->ssc- 224 ssc_readx(params->ssc->regs, params->pdc->xcr),
225 ssc_readx(params->ssc- 225 ssc_readx(params->ssc->regs, params->pdc->xnpr),
226 ssc_readx(params->ssc- 226 ssc_readx(params->ssc->regs, params->pdc->xncr));
227 227
228 ssc_writex(params->ssc->regs, 228 ssc_writex(params->ssc->regs, SSC_IER,
229 params->mask->ssc_e 229 params->mask->ssc_endx | params->mask->ssc_endbuf);
230 ssc_writex(params->ssc->regs, 230 ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
231 params->mask->pdc_e 231 params->mask->pdc_enable);
232 232
233 pr_debug("sr=%u imr=%u\n", 233 pr_debug("sr=%u imr=%u\n",
234 ssc_readx(params->ssc- 234 ssc_readx(params->ssc->regs, SSC_SR),
235 ssc_readx(params->ssc- 235 ssc_readx(params->ssc->regs, SSC_IER));
236 break; /* SNDRV_PCM_T 236 break; /* SNDRV_PCM_TRIGGER_START */
237 237
238 case SNDRV_PCM_TRIGGER_STOP: 238 case SNDRV_PCM_TRIGGER_STOP:
239 case SNDRV_PCM_TRIGGER_SUSPEND: 239 case SNDRV_PCM_TRIGGER_SUSPEND:
240 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 240 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
241 ssc_writex(params->ssc->regs, 241 ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
242 params->mask->pdc_d 242 params->mask->pdc_disable);
243 break; 243 break;
244 244
245 case SNDRV_PCM_TRIGGER_RESUME: 245 case SNDRV_PCM_TRIGGER_RESUME:
246 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 246 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
247 ssc_writex(params->ssc->regs, 247 ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
248 params->mask->pdc_e 248 params->mask->pdc_enable);
249 break; 249 break;
250 250
251 default: 251 default:
252 ret = -EINVAL; 252 ret = -EINVAL;
253 } 253 }
254 254
255 return ret; 255 return ret;
256 } 256 }
257 257
258 static snd_pcm_uframes_t atmel_pcm_pointer(str 258 static snd_pcm_uframes_t atmel_pcm_pointer(struct snd_soc_component *component,
259 str 259 struct snd_pcm_substream *substream)
260 { 260 {
261 struct snd_pcm_runtime *runtime = subs 261 struct snd_pcm_runtime *runtime = substream->runtime;
262 struct atmel_runtime_data *prtd = runt 262 struct atmel_runtime_data *prtd = runtime->private_data;
263 struct atmel_pcm_dma_params *params = 263 struct atmel_pcm_dma_params *params = prtd->params;
264 dma_addr_t ptr; 264 dma_addr_t ptr;
265 snd_pcm_uframes_t x; 265 snd_pcm_uframes_t x;
266 266
267 ptr = (dma_addr_t) ssc_readx(params->s 267 ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr);
268 x = bytes_to_frames(runtime, ptr - prt 268 x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
269 269
270 if (x == runtime->buffer_size) 270 if (x == runtime->buffer_size)
271 x = 0; 271 x = 0;
272 272
273 return x; 273 return x;
274 } 274 }
275 275
276 static int atmel_pcm_open(struct snd_soc_compo 276 static int atmel_pcm_open(struct snd_soc_component *component,
277 struct snd_pcm_subst 277 struct snd_pcm_substream *substream)
278 { 278 {
279 struct snd_pcm_runtime *runtime = subs 279 struct snd_pcm_runtime *runtime = substream->runtime;
280 struct atmel_runtime_data *prtd; 280 struct atmel_runtime_data *prtd;
281 int ret = 0; 281 int ret = 0;
282 282
283 snd_soc_set_runtime_hwparams(substream 283 snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
284 284
285 /* ensure that buffer size is a multip 285 /* ensure that buffer size is a multiple of period size */
286 ret = snd_pcm_hw_constraint_integer(ru 286 ret = snd_pcm_hw_constraint_integer(runtime,
287 287 SNDRV_PCM_HW_PARAM_PERIODS);
288 if (ret < 0) 288 if (ret < 0)
289 goto out; 289 goto out;
290 290
291 prtd = kzalloc(sizeof(struct atmel_run 291 prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
292 if (prtd == NULL) { 292 if (prtd == NULL) {
293 ret = -ENOMEM; 293 ret = -ENOMEM;
294 goto out; 294 goto out;
295 } 295 }
296 runtime->private_data = prtd; 296 runtime->private_data = prtd;
297 297
298 out: 298 out:
299 return ret; 299 return ret;
300 } 300 }
301 301
302 static int atmel_pcm_close(struct snd_soc_comp 302 static int atmel_pcm_close(struct snd_soc_component *component,
303 struct snd_pcm_subs 303 struct snd_pcm_substream *substream)
304 { 304 {
305 struct atmel_runtime_data *prtd = subs 305 struct atmel_runtime_data *prtd = substream->runtime->private_data;
306 306
307 kfree(prtd); 307 kfree(prtd);
308 return 0; 308 return 0;
309 } 309 }
310 310
311 static const struct snd_soc_component_driver a 311 static const struct snd_soc_component_driver atmel_soc_platform = {
312 .open = atmel_pcm_open, 312 .open = atmel_pcm_open,
313 .close = atmel_pcm_close, 313 .close = atmel_pcm_close,
314 .hw_params = atmel_pcm_hw_params, 314 .hw_params = atmel_pcm_hw_params,
315 .hw_free = atmel_pcm_hw_free, 315 .hw_free = atmel_pcm_hw_free,
316 .prepare = atmel_pcm_prepare, 316 .prepare = atmel_pcm_prepare,
317 .trigger = atmel_pcm_trigger, 317 .trigger = atmel_pcm_trigger,
318 .pointer = atmel_pcm_pointer, 318 .pointer = atmel_pcm_pointer,
319 .pcm_construct = atmel_pcm_new, 319 .pcm_construct = atmel_pcm_new,
320 }; 320 };
321 321
322 int atmel_pcm_pdc_platform_register(struct dev 322 int atmel_pcm_pdc_platform_register(struct device *dev)
323 { 323 {
324 return devm_snd_soc_register_component 324 return devm_snd_soc_register_component(dev, &atmel_soc_platform,
325 325 NULL, 0);
326 } 326 }
327 EXPORT_SYMBOL(atmel_pcm_pdc_platform_register) 327 EXPORT_SYMBOL(atmel_pcm_pdc_platform_register);
328 328
329 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@at 329 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
330 MODULE_DESCRIPTION("Atmel PCM module"); 330 MODULE_DESCRIPTION("Atmel PCM module");
331 MODULE_LICENSE("GPL"); 331 MODULE_LICENSE("GPL");
332 332
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