1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
|
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2021 Advanced Micro Devices, Inc.
//
// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
//
/*
* Generic Hardware interface for ACP Audio I2S controller
*/
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <linux/dma-mapping.h>
#include "amd.h"
#define DRV_NAME "acp_i2s_playcap"
static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct device *dev = dai->component->dev;
struct acp_dev_data *adata;
u32 val;
u32 xfer_resolution;
u32 reg_val;
adata = snd_soc_dai_get_drvdata(dai);
/* These values are as per Hardware Spec */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_U8:
case SNDRV_PCM_FORMAT_S8:
xfer_resolution = 0x0;
break;
case SNDRV_PCM_FORMAT_S16_LE:
xfer_resolution = 0x02;
break;
case SNDRV_PCM_FORMAT_S24_LE:
xfer_resolution = 0x04;
break;
case SNDRV_PCM_FORMAT_S32_LE:
xfer_resolution = 0x05;
break;
default:
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
switch (dai->driver->id) {
case I2S_BT_INSTANCE:
reg_val = ACP_BTTDM_ITER;
break;
case I2S_SP_INSTANCE:
reg_val = ACP_I2STDM_ITER;
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
return -EINVAL;
}
} else {
switch (dai->driver->id) {
case I2S_BT_INSTANCE:
reg_val = ACP_BTTDM_IRER;
break;
case I2S_SP_INSTANCE:
reg_val = ACP_I2STDM_IRER;
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
return -EINVAL;
}
}
val = readl(adata->acp_base + reg_val);
val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK;
val = val | (xfer_resolution << 3);
writel(val, adata->acp_base + reg_val);
return 0;
}
static int acp_i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai)
{
struct acp_stream *stream = substream->runtime->private_data;
struct device *dev = dai->component->dev;
struct acp_dev_data *adata = dev_get_drvdata(dev);
u32 val, period_bytes, reg_val, ier_val, water_val, buf_size, buf_reg;
period_bytes = frames_to_bytes(substream->runtime, substream->runtime->period_size);
buf_size = frames_to_bytes(substream->runtime, substream->runtime->buffer_size);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
stream->bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
switch (dai->driver->id) {
case I2S_BT_INSTANCE:
water_val = ACP_BT_TX_INTR_WATERMARK_SIZE;
reg_val = ACP_BTTDM_ITER;
ier_val = ACP_BTTDM_IER;
buf_reg = ACP_BT_TX_RINGBUFSIZE;
break;
case I2S_SP_INSTANCE:
water_val = ACP_I2S_TX_INTR_WATERMARK_SIZE;
reg_val = ACP_I2STDM_ITER;
ier_val = ACP_I2STDM_IER;
buf_reg = ACP_I2S_TX_RINGBUFSIZE;
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
return -EINVAL;
}
} else {
switch (dai->driver->id) {
case I2S_BT_INSTANCE:
water_val = ACP_BT_RX_INTR_WATERMARK_SIZE;
reg_val = ACP_BTTDM_IRER;
ier_val = ACP_BTTDM_IER;
buf_reg = ACP_BT_RX_RINGBUFSIZE;
break;
case I2S_SP_INSTANCE:
water_val = ACP_I2S_RX_INTR_WATERMARK_SIZE;
reg_val = ACP_I2STDM_IRER;
ier_val = ACP_I2STDM_IER;
buf_reg = ACP_I2S_RX_RINGBUFSIZE;
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
return -EINVAL;
}
}
writel(period_bytes, adata->acp_base + water_val);
writel(buf_size, adata->acp_base + buf_reg);
val = readl(adata->acp_base + reg_val);
val = val | BIT(0);
writel(val, adata->acp_base + reg_val);
writel(1, adata->acp_base + ier_val);
return 0;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
switch (dai->driver->id) {
case I2S_BT_INSTANCE:
reg_val = ACP_BTTDM_ITER;
break;
case I2S_SP_INSTANCE:
reg_val = ACP_I2STDM_ITER;
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
return -EINVAL;
}
} else {
switch (dai->driver->id) {
case I2S_BT_INSTANCE:
reg_val = ACP_BTTDM_IRER;
break;
case I2S_SP_INSTANCE:
reg_val = ACP_I2STDM_IRER;
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
return -EINVAL;
}
}
val = readl(adata->acp_base + reg_val);
val = val & ~BIT(0);
writel(val, adata->acp_base + reg_val);
if (!(readl(adata->acp_base + ACP_BTTDM_ITER) & BIT(0)) &&
!(readl(adata->acp_base + ACP_BTTDM_IRER) & BIT(0)))
writel(0, adata->acp_base + ACP_BTTDM_IER);
if (!(readl(adata->acp_base + ACP_I2STDM_ITER) & BIT(0)) &&
!(readl(adata->acp_base + ACP_I2STDM_IRER) & BIT(0)))
writel(0, adata->acp_base + ACP_I2STDM_IER);
return 0;
default:
return -EINVAL;
}
return 0;
}
static int acp_i2s_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
{
struct device *dev = dai->component->dev;
struct acp_dev_data *adata = dev_get_drvdata(dev);
struct acp_stream *stream = substream->runtime->private_data;
u32 reg_dma_size = 0, reg_fifo_size = 0, reg_fifo_addr = 0;
u32 phy_addr = 0, acp_fifo_addr = 0, ext_int_ctrl;
unsigned int dir = substream->stream;
switch (dai->driver->id) {
case I2S_SP_INSTANCE:
if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
reg_dma_size = ACP_I2S_TX_DMA_SIZE;
acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
SP_PB_FIFO_ADDR_OFFSET;
reg_fifo_addr = ACP_I2S_TX_FIFOADDR;
reg_fifo_size = ACP_I2S_TX_FIFOSIZE;
phy_addr = I2S_SP_TX_MEM_WINDOW_START + stream->reg_offset;
writel(phy_addr, adata->acp_base + ACP_I2S_TX_RINGBUFADDR);
} else {
reg_dma_size = ACP_I2S_RX_DMA_SIZE;
acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
SP_CAPT_FIFO_ADDR_OFFSET;
reg_fifo_addr = ACP_I2S_RX_FIFOADDR;
reg_fifo_size = ACP_I2S_RX_FIFOSIZE;
phy_addr = I2S_SP_RX_MEM_WINDOW_START + stream->reg_offset;
writel(phy_addr, adata->acp_base + ACP_I2S_RX_RINGBUFADDR);
}
break;
case I2S_BT_INSTANCE:
if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
reg_dma_size = ACP_BT_TX_DMA_SIZE;
acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
BT_PB_FIFO_ADDR_OFFSET;
reg_fifo_addr = ACP_BT_TX_FIFOADDR;
reg_fifo_size = ACP_BT_TX_FIFOSIZE;
phy_addr = I2S_BT_TX_MEM_WINDOW_START + stream->reg_offset;
writel(phy_addr, adata->acp_base + ACP_BT_TX_RINGBUFADDR);
} else {
reg_dma_size = ACP_BT_RX_DMA_SIZE;
acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
BT_CAPT_FIFO_ADDR_OFFSET;
reg_fifo_addr = ACP_BT_RX_FIFOADDR;
reg_fifo_size = ACP_BT_RX_FIFOSIZE;
phy_addr = I2S_BT_TX_MEM_WINDOW_START + stream->reg_offset;
writel(phy_addr, adata->acp_base + ACP_BT_RX_RINGBUFADDR);
}
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
return -EINVAL;
}
writel(DMA_SIZE, adata->acp_base + reg_dma_size);
writel(acp_fifo_addr, adata->acp_base + reg_fifo_addr);
writel(FIFO_SIZE, adata->acp_base + reg_fifo_size);
ext_int_ctrl = readl(adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
ext_int_ctrl |= BIT(I2S_RX_THRESHOLD) | BIT(BT_RX_THRESHOLD)
| BIT(I2S_TX_THRESHOLD) | BIT(BT_TX_THRESHOLD);
writel(ext_int_ctrl, adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
return 0;
}
static int acp_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
{
struct acp_stream *stream = substream->runtime->private_data;
struct device *dev = dai->component->dev;
unsigned int dir = substream->stream;
unsigned int irq_bit = 0;
switch (dai->driver->id) {
case I2S_SP_INSTANCE:
if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
irq_bit = BIT(I2S_TX_THRESHOLD);
stream->pte_offset = ACP_SRAM_SP_PB_PTE_OFFSET;
stream->fifo_offset = SP_PB_FIFO_ADDR_OFFSET;
} else {
irq_bit = BIT(I2S_RX_THRESHOLD);
stream->pte_offset = ACP_SRAM_SP_CP_PTE_OFFSET;
stream->fifo_offset = SP_CAPT_FIFO_ADDR_OFFSET;
}
break;
case I2S_BT_INSTANCE:
if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
irq_bit = BIT(BT_TX_THRESHOLD);
stream->pte_offset = ACP_SRAM_BT_PB_PTE_OFFSET;
stream->fifo_offset = BT_PB_FIFO_ADDR_OFFSET;
} else {
irq_bit = BIT(BT_RX_THRESHOLD);
stream->pte_offset = ACP_SRAM_BT_CP_PTE_OFFSET;
stream->fifo_offset = BT_CAPT_FIFO_ADDR_OFFSET;
}
break;
default:
dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
return -EINVAL;
}
/* Save runtime dai configuration in stream */
stream->id = dai->driver->id + dir;
stream->dai_id = dai->driver->id;
stream->irq_bit = irq_bit;
return 0;
}
const struct snd_soc_dai_ops asoc_acp_cpu_dai_ops = {
.startup = acp_i2s_startup,
.hw_params = acp_i2s_hwparams,
.prepare = acp_i2s_prepare,
.trigger = acp_i2s_trigger,
};
EXPORT_SYMBOL_NS_GPL(asoc_acp_cpu_dai_ops, SND_SOC_ACP_COMMON);
int asoc_acp_i2s_probe(struct snd_soc_dai *dai)
{
struct device *dev = dai->component->dev;
struct acp_dev_data *adata = dev_get_drvdata(dev);
unsigned int val;
if (!adata->acp_base) {
dev_err(dev, "I2S base is NULL\n");
return -EINVAL;
}
val = readl(adata->acp_base + ACP_I2S_PIN_CONFIG);
if (val != I2S_MODE) {
dev_err(dev, "I2S Mode not supported val %x\n", val);
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL_NS_GPL(asoc_acp_i2s_probe, SND_SOC_ACP_COMMON);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS(DRV_NAME);
|
