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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/pm_runtime.h>
22#include <linux/dma-mapping.h>
23
24#include "amd.h"
25
26#define DRV_NAME "acp_i2s_dma"
27
28static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
29 .info = SNDRV_PCM_INFO_INTERLEAVED |
30 SNDRV_PCM_INFO_BLOCK_TRANSFER |
31 SNDRV_PCM_INFO_BATCH |
32 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
33 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
34 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
35 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
36 SNDRV_PCM_FMTBIT_S32_LE,
37 .channels_min = 2,
38 .channels_max = 8,
39 .rates = SNDRV_PCM_RATE_8000_96000,
40 .rate_min = 8000,
41 .rate_max = 96000,
42 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
43 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
44 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
45 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
46 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
47};
48
49static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
50 .info = SNDRV_PCM_INFO_INTERLEAVED |
51 SNDRV_PCM_INFO_BLOCK_TRANSFER |
52 SNDRV_PCM_INFO_BATCH |
53 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
54 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
55 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
56 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
57 SNDRV_PCM_FMTBIT_S32_LE,
58 .channels_min = 2,
59 .channels_max = 2,
60 .rates = SNDRV_PCM_RATE_8000_48000,
61 .rate_min = 8000,
62 .rate_max = 48000,
63 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
64 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
65 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
66 .periods_min = CAPTURE_MIN_NUM_PERIODS,
67 .periods_max = CAPTURE_MAX_NUM_PERIODS,
68};
69
70int acp_machine_select(struct acp_dev_data *adata)
71{
72 struct snd_soc_acpi_mach *mach;
73 int size;
74
75 size = sizeof(*adata->machines);
76 mach = snd_soc_acpi_find_machine(adata->machines);
77 if (!mach) {
78 dev_err(adata->dev, "warning: No matching ASoC machine driver found\n");
79 return -EINVAL;
80 }
81
82 adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name,
83 PLATFORM_DEVID_NONE, mach, size);
84 if (IS_ERR(adata->mach_dev))
85 dev_warn(adata->dev, "Unable to register Machine device\n");
86
87 return 0;
88}
89EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON);
90
91static irqreturn_t i2s_irq_handler(int irq, void *data)
92{
93 struct acp_dev_data *adata = data;
94 struct acp_stream *stream;
95 u16 i2s_flag = 0;
96 u32 val, i;
97
98 if (!adata)
99 return IRQ_NONE;
100
101 val = readl(adata->acp_base + ACP_EXTERNAL_INTR_STAT);
102
103 for (i = 0; i < ACP_MAX_STREAM; i++) {
104 stream = adata->stream[i];
105 if (stream && (val & stream->irq_bit)) {
106 writel(stream->irq_bit, adata->acp_base + ACP_EXTERNAL_INTR_STAT);
107 snd_pcm_period_elapsed(stream->substream);
108 i2s_flag = 1;
109 break;
110 }
111 }
112
113 if (i2s_flag)
114 return IRQ_HANDLED;
115
116 return IRQ_NONE;
117}
118
119static void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream)
120{
121 u32 pte_reg, pte_size, reg_val;
122
123
124 pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5;
125 pte_size = ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5;
126 stream->reg_offset = 0x02000000;
127
128
129 reg_val = ACP_SRAM_PTE_OFFSET;
130 writel(reg_val | BIT(31), adata->acp_base + pte_reg);
131 writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + pte_size);
132}
133
134static void config_acp_dma(struct acp_dev_data *adata, int cpu_id, int size)
135{
136 struct acp_stream *stream = adata->stream[cpu_id];
137 struct snd_pcm_substream *substream = stream->substream;
138 dma_addr_t addr = substream->dma_buffer.addr;
139 int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
140 u32 low, high, val;
141 u16 page_idx;
142
143 val = stream->pte_offset;
144
145 for (page_idx = 0; page_idx < num_pages; page_idx++) {
146
147 low = lower_32_bits(addr);
148 high = upper_32_bits(addr);
149 writel(low, adata->acp_base + ACP_SCRATCH_REG_0 + val);
150 high |= BIT(31);
151 writel(high, adata->acp_base + ACP_SCRATCH_REG_0 + val + 4);
152
153
154 val += 8;
155 addr += PAGE_SIZE;
156 }
157}
158
159static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream)
160{
161 struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
162 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
163 struct snd_pcm_runtime *runtime = substream->runtime;
164 struct device *dev = component->dev;
165 struct acp_dev_data *adata = dev_get_drvdata(dev);
166 struct acp_stream *stream;
167 int stream_id = cpu_dai->driver->id * 2 + substream->stream;
168 int ret;
169
170 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
171 if (!stream)
172 return -ENOMEM;
173
174 stream->substream = substream;
175 adata->stream[stream_id] = stream;
176
177 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
178 runtime->hw = acp_pcm_hardware_playback;
179 else
180 runtime->hw = acp_pcm_hardware_capture;
181
182 ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
183 if (ret < 0) {
184 dev_err(component->dev, "set integer constraint failed\n");
185 kfree(stream);
186 return ret;
187 }
188 runtime->private_data = stream;
189
190 writel(1, adata->acp_base + ACP_EXTERNAL_INTR_ENB);
191
192 return ret;
193}
194
195static int acp_dma_hw_params(struct snd_soc_component *component,
196 struct snd_pcm_substream *substream,
197 struct snd_pcm_hw_params *params)
198{
199 struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
200 struct acp_dev_data *adata = snd_soc_component_get_drvdata(component);
201 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
202 struct acp_stream *stream = substream->runtime->private_data;
203 int stream_id = cpu_dai->driver->id * 2 + substream->stream;
204 u64 size = params_buffer_bytes(params);
205
206
207 config_pte_for_stream(adata, stream);
208 config_acp_dma(adata, stream_id, size);
209
210 return 0;
211}
212
213static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
214 struct snd_pcm_substream *substream)
215{
216 struct device *dev = component->dev;
217 struct acp_dev_data *adata = dev_get_drvdata(dev);
218 struct acp_stream *stream = substream->runtime->private_data;
219 u32 pos, buffersize;
220 u64 bytescount;
221
222 buffersize = frames_to_bytes(substream->runtime,
223 substream->runtime->buffer_size);
224
225 bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);
226
227 if (bytescount > stream->bytescount)
228 bytescount -= stream->bytescount;
229
230 pos = do_div(bytescount, buffersize);
231
232 return bytes_to_frames(substream->runtime, pos);
233}
234
235static int acp_dma_new(struct snd_soc_component *component,
236 struct snd_soc_pcm_runtime *rtd)
237{
238 struct device *parent = component->dev->parent;
239
240 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
241 parent, MIN_BUFFER, MAX_BUFFER);
242 return 0;
243}
244
245static int acp_dma_mmap(struct snd_soc_component *component,
246 struct snd_pcm_substream *substream,
247 struct vm_area_struct *vma)
248{
249 return snd_pcm_lib_default_mmap(substream, vma);
250}
251
252static int acp_dma_close(struct snd_soc_component *component,
253 struct snd_pcm_substream *substream)
254{
255 struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
256 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
257 struct device *dev = component->dev;
258 struct acp_dev_data *adata = dev_get_drvdata(dev);
259 struct acp_stream *stream;
260 int stream_id = cpu_dai->driver->id * 2 + substream->stream;
261
262 stream = adata->stream[stream_id];
263 kfree(stream);
264 adata->stream[stream_id] = NULL;
265
266 return 0;
267}
268
269static const struct snd_soc_component_driver acp_pcm_component = {
270 .name = DRV_NAME,
271 .open = acp_dma_open,
272 .close = acp_dma_close,
273 .hw_params = acp_dma_hw_params,
274 .pointer = acp_dma_pointer,
275 .mmap = acp_dma_mmap,
276 .pcm_construct = acp_dma_new,
277};
278
279int acp_platform_register(struct device *dev)
280{
281 struct acp_dev_data *adata = dev_get_drvdata(dev);
282 struct snd_soc_dai_driver;
283 unsigned int status;
284
285 status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler,
286 IRQF_SHARED, "ACP_I2S_IRQ", adata);
287 if (status) {
288 dev_err(dev, "ACP I2S IRQ request failed\n");
289 return status;
290 }
291
292 status = devm_snd_soc_register_component(dev, &acp_pcm_component,
293 adata->dai_driver,
294 adata->num_dai);
295 if (status) {
296 dev_err(dev, "Fail to register acp i2s component\n");
297 return status;
298 }
299 return 0;
300}
301EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON);
302
303int acp_platform_unregister(struct device *dev)
304{
305 struct acp_dev_data *adata = dev_get_drvdata(dev);
306
307 if (adata->mach_dev)
308 platform_device_unregister(adata->mach_dev);
309 return 0;
310}
311EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON);
312
313MODULE_DESCRIPTION("AMD ACP PCM Driver");
314MODULE_LICENSE("Dual BSD/GPL");
315MODULE_ALIAS(DRV_NAME);
316
