summaryrefslogtreecommitdiff
path: root/sound/soc/amd/acp/acp-platform.c
blob: f561d39b33e2adb8638f36aada844ed609554c3e (plain)
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
// 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 interface for ACP audio blck PCM component
 */

#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/pm_runtime.h>
#include <linux/dma-mapping.h>

#include "amd.h"

#define DRV_NAME "acp_i2s_dma"

static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
	.info = SNDRV_PCM_INFO_INTERLEAVED |
		SNDRV_PCM_INFO_BLOCK_TRANSFER |
		SNDRV_PCM_INFO_BATCH |
		SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
	.formats = SNDRV_PCM_FMTBIT_S16_LE |  SNDRV_PCM_FMTBIT_S8 |
		   SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
		   SNDRV_PCM_FMTBIT_S32_LE,
	.channels_min = 2,
	.channels_max = 8,
	.rates = SNDRV_PCM_RATE_8000_96000,
	.rate_min = 8000,
	.rate_max = 96000,
	.buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
	.period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
	.period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
	.periods_min = PLAYBACK_MIN_NUM_PERIODS,
	.periods_max = PLAYBACK_MAX_NUM_PERIODS,
};

static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
	.info = SNDRV_PCM_INFO_INTERLEAVED |
		SNDRV_PCM_INFO_BLOCK_TRANSFER |
		SNDRV_PCM_INFO_BATCH |
		SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
	.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
		   SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
		   SNDRV_PCM_FMTBIT_S32_LE,
	.channels_min = 2,
	.channels_max = 2,
	.rates = SNDRV_PCM_RATE_8000_48000,
	.rate_min = 8000,
	.rate_max = 48000,
	.buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
	.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
	.period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
	.periods_min = CAPTURE_MIN_NUM_PERIODS,
	.periods_max = CAPTURE_MAX_NUM_PERIODS,
};

int acp_machine_select(struct acp_dev_data *adata)
{
	struct snd_soc_acpi_mach *mach;
	int size;

	size = sizeof(*adata->machines);
	mach = snd_soc_acpi_find_machine(adata->machines);
	if (!mach) {
		dev_err(adata->dev, "warning: No matching ASoC machine driver found\n");
		return -EINVAL;
	}

	adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name,
							PLATFORM_DEVID_NONE, mach, size);
	if (IS_ERR(adata->mach_dev))
		dev_warn(adata->dev, "Unable to register Machine device\n");

	return 0;
}
EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON);

static irqreturn_t i2s_irq_handler(int irq, void *data)
{
	struct acp_dev_data *adata = data;
	struct acp_resource *rsrc = adata->rsrc;
	struct acp_stream *stream;
	u16 i2s_flag = 0;
	u32 ext_intr_stat, ext_intr_stat1, i;

	if (!adata)
		return IRQ_NONE;

	if (adata->rsrc->no_of_ctrls == 2)
		ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));

	ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));

	for (i = 0; i < ACP_MAX_STREAM; i++) {
		stream = adata->stream[i];
		if (stream && (ext_intr_stat & stream->irq_bit)) {
			writel(stream->irq_bit,
			       ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
			snd_pcm_period_elapsed(stream->substream);
			i2s_flag = 1;
			break;
		}
		if (adata->rsrc->no_of_ctrls == 2) {
			if (stream && (ext_intr_stat1 & stream->irq_bit)) {
				writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata,
				       (rsrc->irqp_used - 1)));
				snd_pcm_period_elapsed(stream->substream);
				i2s_flag = 1;
				break;
			}
		}
	}
	if (i2s_flag)
		return IRQ_HANDLED;

	return IRQ_NONE;
}

static void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream)
{
	struct acp_resource *rsrc = adata->rsrc;
	u32 pte_reg, pte_size, reg_val;

	/* Use ATU base Group5 */
	pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5;
	pte_size =  ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5;
	stream->reg_offset = 0x02000000;

	/* Group Enable */
	reg_val = rsrc->sram_pte_offset;
	writel(reg_val | BIT(31), adata->acp_base + pte_reg);
	writel(PAGE_SIZE_4K_ENABLE,  adata->acp_base + pte_size);
	writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
}

static void config_acp_dma(struct acp_dev_data *adata, int cpu_id, int size)
{
	struct acp_stream *stream = adata->stream[cpu_id];
	struct snd_pcm_substream *substream = stream->substream;
	struct acp_resource *rsrc = adata->rsrc;
	dma_addr_t addr = substream->dma_buffer.addr;
	int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
	u32 low, high, val;
	u16 page_idx;

	val = stream->pte_offset;

	for (page_idx = 0; page_idx < num_pages; page_idx++) {
		/* Load the low address of page int ACP SRAM through SRBM */
		low = lower_32_bits(addr);
		high = upper_32_bits(addr);
		writel(low, adata->acp_base + rsrc->scratch_reg_offset + val);
		high |= BIT(31);
		writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4);

		/* Move to next physically contiguous page */
		val += 8;
		addr += PAGE_SIZE;
	}
}

static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct device *dev = component->dev;
	struct acp_dev_data *adata = dev_get_drvdata(dev);
	struct acp_stream *stream;
	int stream_id = cpu_dai->driver->id * 2 + substream->stream;
	int ret;

	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	if (!stream)
		return -ENOMEM;

	stream->substream = substream;
	adata->stream[stream_id] = stream;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		runtime->hw = acp_pcm_hardware_playback;
	else
		runtime->hw = acp_pcm_hardware_capture;

	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0) {
		dev_err(component->dev, "set integer constraint failed\n");
		kfree(stream);
		return ret;
	}
	runtime->private_data = stream;

	writel(1, ACP_EXTERNAL_INTR_ENB(adata));

	return ret;
}

static int acp_dma_hw_params(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
	struct acp_dev_data *adata = snd_soc_component_get_drvdata(component);
	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
	struct acp_stream *stream = substream->runtime->private_data;
	int stream_id = cpu_dai->driver->id * 2 + substream->stream;
	u64 size = params_buffer_bytes(params);

	/* Configure ACP DMA block with params */
	config_pte_for_stream(adata, stream);
	config_acp_dma(adata, stream_id, size);

	return 0;
}

static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
					 struct snd_pcm_substream *substream)
{
	struct device *dev = component->dev;
	struct acp_dev_data *adata = dev_get_drvdata(dev);
	struct acp_stream *stream = substream->runtime->private_data;
	u32 pos, buffersize;
	u64 bytescount;

	buffersize = frames_to_bytes(substream->runtime,
				     substream->runtime->buffer_size);

	bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);

	if (bytescount > stream->bytescount)
		bytescount -= stream->bytescount;

	pos = do_div(bytescount, buffersize);

	return bytes_to_frames(substream->runtime, pos);
}

static int acp_dma_new(struct snd_soc_component *component,
		       struct snd_soc_pcm_runtime *rtd)
{
	struct device *parent = component->dev->parent;

	snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
				       parent, MIN_BUFFER, MAX_BUFFER);
	return 0;
}

static int acp_dma_close(struct snd_soc_component *component,
			 struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
	struct device *dev = component->dev;
	struct acp_dev_data *adata = dev_get_drvdata(dev);
	struct acp_stream *stream;
	int stream_id = cpu_dai->driver->id * 2 + substream->stream;

	stream = adata->stream[stream_id];
	kfree(stream);
	adata->stream[stream_id] = NULL;

	return 0;
}

static const struct snd_soc_component_driver acp_pcm_component = {
	.name			= DRV_NAME,
	.open			= acp_dma_open,
	.close			= acp_dma_close,
	.hw_params		= acp_dma_hw_params,
	.pointer		= acp_dma_pointer,
	.pcm_construct		= acp_dma_new,
	.legacy_dai_naming	= 1,
};

int acp_platform_register(struct device *dev)
{
	struct acp_dev_data *adata = dev_get_drvdata(dev);
	struct snd_soc_dai_driver;
	unsigned int status;

	status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler,
				  IRQF_SHARED, "ACP_I2S_IRQ", adata);
	if (status) {
		dev_err(dev, "ACP I2S IRQ request failed\n");
		return status;
	}

	status = devm_snd_soc_register_component(dev, &acp_pcm_component,
						 adata->dai_driver,
						 adata->num_dai);
	if (status) {
		dev_err(dev, "Fail to register acp i2s component\n");
		return status;
	}
	return 0;
}
EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON);

int acp_platform_unregister(struct device *dev)
{
	struct acp_dev_data *adata = dev_get_drvdata(dev);

	if (adata->mach_dev)
		platform_device_unregister(adata->mach_dev);
	return 0;
}
EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON);

MODULE_DESCRIPTION("AMD ACP PCM Driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS(DRV_NAME);