1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 //
3 // This file is provided under a dual BSD/GPLv2 license. When using or
4 // redistributing this file, you may do so under either license.
5 //
6 // Copyright(c) 2021 Advanced Micro Devices, Inc.
7 //
8 // Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
9
10 /*
11 * Generic interface for ACP audio blck PCM component
12 */
13
14 #include <linux/platform_device.h>
15 #include <linux/module.h>
16 #include <linux/err.h>
17 #include <linux/io.h>
18 #include <sound/pcm_params.h>
19 #include <sound/soc.h>
20 #include <sound/soc-dai.h>
21 #include <linux/dma-mapping.h>
22
23 #include "amd.h"
24 #include "../mach-config.h"
25 #include "acp-mach.h"
26
27 #define DRV_NAME "acp_i2s_dma"
28
29 static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
30 .info = SNDRV_PCM_INFO_INTERLEAVED |
31 SNDRV_PCM_INFO_BLOCK_TRANSFER |
32 SNDRV_PCM_INFO_BATCH |
33 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
34 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
35 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
36 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
37 SNDRV_PCM_FMTBIT_S32_LE,
38 .channels_min = 2,
39 .channels_max = 8,
40 .rates = SNDRV_PCM_RATE_8000_96000,
41 .rate_min = 8000,
42 .rate_max = 96000,
43 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
44 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
45 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
46 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
47 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
48 };
49
50 static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
51 .info = SNDRV_PCM_INFO_INTERLEAVED |
52 SNDRV_PCM_INFO_BLOCK_TRANSFER |
53 SNDRV_PCM_INFO_BATCH |
54 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
55 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
56 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
57 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
58 SNDRV_PCM_FMTBIT_S32_LE,
59 .channels_min = 2,
60 .channels_max = 2,
61 .rates = SNDRV_PCM_RATE_8000_48000,
62 .rate_min = 8000,
63 .rate_max = 48000,
64 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
65 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
66 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
67 .periods_min = CAPTURE_MIN_NUM_PERIODS,
68 .periods_max = CAPTURE_MAX_NUM_PERIODS,
69 };
70
71 int acp_machine_select(struct acp_dev_data *adata)
72 {
73 struct snd_soc_acpi_mach *mach;
74 int size, platform;
75
76 if (adata->flag == FLAG_AMD_LEGACY_ONLY_DMIC) {
77 platform = adata->platform;
78 adata->mach_dev = platform_device_register_data(adata->dev, "acp-pdm-mach",
79 PLATFORM_DEVID_NONE, &platform,
80 sizeof(platform));
81 } else {
82 size = sizeof(*adata->machines);
83 mach = snd_soc_acpi_find_machine(adata->machines);
84 if (!mach) {
85 dev_err(adata->dev, "warning: No matching ASoC machine driver found\n");
86 return -EINVAL;
87 }
88 adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name,
89 PLATFORM_DEVID_NONE, mach, size);
90 }
91 if (IS_ERR(adata->mach_dev))
92 dev_warn(adata->dev, "Unable to register Machine device\n");
93 return 0;
94 }
95 EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON);
96
97 static irqreturn_t i2s_irq_handler(int irq, void *data)
98 {
99 struct acp_dev_data *adata = data;
100 struct acp_resource *rsrc = adata->rsrc;
101 struct acp_stream *stream;
102 u16 i2s_flag = 0;
103 u32 ext_intr_stat, ext_intr_stat1;
104
105 if (!adata)
106 return IRQ_NONE;
107
108 if (adata->rsrc->no_of_ctrls == 2)
109 ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));
110
111 ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
112
113 spin_lock(&adata->acp_lock);
114 list_for_each_entry(stream, &adata->stream_list, list) {
115 if (ext_intr_stat & stream->irq_bit) {
116 writel(stream->irq_bit,
117 ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
118 snd_pcm_period_elapsed(stream->substream);
119 i2s_flag = 1;
120 }
121 if (adata->rsrc->no_of_ctrls == 2) {
122 if (ext_intr_stat1 & stream->irq_bit) {
123 writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata,
124 (rsrc->irqp_used - 1)));
125 snd_pcm_period_elapsed(stream->substream);
126 i2s_flag = 1;
127 }
128 }
129 }
130 spin_unlock(&adata->acp_lock);
131 if (i2s_flag)
132 return IRQ_HANDLED;
133
134 return IRQ_NONE;
135 }
136
137 void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream)
138 {
139 struct acp_resource *rsrc = adata->rsrc;
140 u32 pte_reg, pte_size, reg_val;
141
142 /* Use ATU base Group5 */
143 pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5;
144 pte_size = ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5;
145 stream->reg_offset = 0x02000000;
146
147 /* Group Enable */
148 reg_val = rsrc->sram_pte_offset;
149 writel(reg_val | BIT(31), adata->acp_base + pte_reg);
150 writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + pte_size);
151 writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
152 }
153 EXPORT_SYMBOL_NS_GPL(config_pte_for_stream, SND_SOC_ACP_COMMON);
154
155 void config_acp_dma(struct acp_dev_data *adata, struct acp_stream *stream, int size)
156 {
157 struct snd_pcm_substream *substream = stream->substream;
158 struct acp_resource *rsrc = adata->rsrc;
159 dma_addr_t addr = substream->dma_buffer.addr;
160 int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
161 u32 low, high, val;
162 u16 page_idx;
163
164 val = stream->pte_offset;
165
166 for (page_idx = 0; page_idx < num_pages; page_idx++) {
167 /* Load the low address of page int ACP SRAM through SRBM */
168 low = lower_32_bits(addr);
169 high = upper_32_bits(addr);
170 writel(low, adata->acp_base + rsrc->scratch_reg_offset + val);
171 high |= BIT(31);
172 writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4);
173
174 /* Move to next physically contiguous page */
175 val += 8;
176 addr += PAGE_SIZE;
177 }
178 }
179 EXPORT_SYMBOL_NS_GPL(config_acp_dma, SND_SOC_ACP_COMMON);
180
181 static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream)
182 {
183 struct snd_pcm_runtime *runtime = substream->runtime;
184 struct device *dev = component->dev;
185 struct acp_dev_data *adata = dev_get_drvdata(dev);
186 struct acp_stream *stream;
187 int ret;
188
189 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
190 if (!stream)
191 return -ENOMEM;
192
193 stream->substream = substream;
194
195 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
196 runtime->hw = acp_pcm_hardware_playback;
197 else
198 runtime->hw = acp_pcm_hardware_capture;
199
200 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, DMA_SIZE);
201 if (ret) {
202 dev_err(component->dev, "set hw constraint HW_PARAM_PERIOD_BYTES failed\n");
203 kfree(stream);
204 return ret;
205 }
206
207 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, DMA_SIZE);
208 if (ret) {
209 dev_err(component->dev, "set hw constraint HW_PARAM_BUFFER_BYTES failed\n");
210 kfree(stream);
211 return ret;
212 }
213
214 ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
215 if (ret < 0) {
216 dev_err(component->dev, "set integer constraint failed\n");
217 kfree(stream);
218 return ret;
219 }
220 runtime->private_data = stream;
221
222 writel(1, ACP_EXTERNAL_INTR_ENB(adata));
223
224 spin_lock_irq(&adata->acp_lock);
225 list_add_tail(&stream->list, &adata->stream_list);
226 spin_unlock_irq(&adata->acp_lock);
227
228 return ret;
229 }
230
231 static int acp_dma_hw_params(struct snd_soc_component *component,
232 struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *params)
234 {
235 struct acp_dev_data *adata = snd_soc_component_get_drvdata(component);
236 struct acp_stream *stream = substream->runtime->private_data;
237 u64 size = params_buffer_bytes(params);
238
239 /* Configure ACP DMA block with params */
240 config_pte_for_stream(adata, stream);
241 config_acp_dma(adata, stream, size);
242
243 return 0;
244 }
245
246 static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
247 struct snd_pcm_substream *substream)
248 {
249 struct device *dev = component->dev;
250 struct acp_dev_data *adata = dev_get_drvdata(dev);
251 struct acp_stream *stream = substream->runtime->private_data;
252 u32 pos, buffersize;
253 u64 bytescount;
254
255 buffersize = frames_to_bytes(substream->runtime,
256 substream->runtime->buffer_size);
257
258 bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);
259
260 if (bytescount > stream->bytescount)
261 bytescount -= stream->bytescount;
262
263 pos = do_div(bytescount, buffersize);
264
265 return bytes_to_frames(substream->runtime, pos);
266 }
267
268 static int acp_dma_new(struct snd_soc_component *component,
269 struct snd_soc_pcm_runtime *rtd)
270 {
271 struct device *parent = component->dev->parent;
272
273 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
274 parent, MIN_BUFFER, MAX_BUFFER);
275 return 0;
276 }
277
278 static int acp_dma_close(struct snd_soc_component *component,
279 struct snd_pcm_substream *substream)
280 {
281 struct device *dev = component->dev;
282 struct acp_dev_data *adata = dev_get_drvdata(dev);
283 struct acp_stream *stream = substream->runtime->private_data;
284
285 /* Remove entry from list */
286 spin_lock_irq(&adata->acp_lock);
287 list_del(&stream->list);
288 spin_unlock_irq(&adata->acp_lock);
289 kfree(stream);
290
291 return 0;
292 }
293
294 static const struct snd_soc_component_driver acp_pcm_component = {
295 .name = DRV_NAME,
296 .open = acp_dma_open,
297 .close = acp_dma_close,
298 .hw_params = acp_dma_hw_params,
299 .pointer = acp_dma_pointer,
300 .pcm_construct = acp_dma_new,
301 .legacy_dai_naming = 1,
302 };
303
304 int acp_platform_register(struct device *dev)
305 {
306 struct acp_dev_data *adata = dev_get_drvdata(dev);
307 struct snd_soc_dai_driver;
308 unsigned int status;
309
310 status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler,
311 IRQF_SHARED, "ACP_I2S_IRQ", adata);
312 if (status) {
313 dev_err(dev, "ACP I2S IRQ request failed\n");
314 return status;
315 }
316
317 status = devm_snd_soc_register_component(dev, &acp_pcm_component,
318 adata->dai_driver,
319 adata->num_dai);
320 if (status) {
321 dev_err(dev, "Fail to register acp i2s component\n");
322 return status;
323 }
324
325 INIT_LIST_HEAD(&adata->stream_list);
326 spin_lock_init(&adata->acp_lock);
327
328 return 0;
329 }
330 EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON);
331
332 int acp_platform_unregister(struct device *dev)
333 {
334 struct acp_dev_data *adata = dev_get_drvdata(dev);
335
336 if (adata->mach_dev)
337 platform_device_unregister(adata->mach_dev);
338 return 0;
339 }
340 EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON);
341
342 MODULE_DESCRIPTION("AMD ACP PCM Driver");
343 MODULE_LICENSE("Dual BSD/GPL");
344 MODULE_ALIAS(DRV_NAME);
345
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