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Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux...
[linux.git] / sound / soc / amd / acp / acp-platform.c
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 <[email protected]>
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/pm_runtime.h>
22 #include <linux/dma-mapping.h>
23
24 #include "amd.h"
25
26 #define DRV_NAME "acp_i2s_dma"
27
28 static 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
49 static 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
70 int 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 }
89 EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON);
90
91 static irqreturn_t i2s_irq_handler(int irq, void *data)
92 {
93         struct acp_dev_data *adata = data;
94         struct acp_resource *rsrc = adata->rsrc;
95         struct acp_stream *stream;
96         u16 i2s_flag = 0;
97         u32 ext_intr_stat, ext_intr_stat1;
98
99         if (!adata)
100                 return IRQ_NONE;
101
102         if (adata->rsrc->no_of_ctrls == 2)
103                 ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));
104
105         ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
106
107         spin_lock(&adata->acp_lock);
108         list_for_each_entry(stream, &adata->stream_list, list) {
109                 if (ext_intr_stat & stream->irq_bit) {
110                         writel(stream->irq_bit,
111                                ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
112                         snd_pcm_period_elapsed(stream->substream);
113                         i2s_flag = 1;
114                 }
115                 if (adata->rsrc->no_of_ctrls == 2) {
116                         if (ext_intr_stat1 & stream->irq_bit) {
117                                 writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata,
118                                        (rsrc->irqp_used - 1)));
119                                 snd_pcm_period_elapsed(stream->substream);
120                                 i2s_flag = 1;
121                         }
122                 }
123         }
124         spin_unlock(&adata->acp_lock);
125         if (i2s_flag)
126                 return IRQ_HANDLED;
127
128         return IRQ_NONE;
129 }
130
131 static void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream)
132 {
133         struct acp_resource *rsrc = adata->rsrc;
134         u32 pte_reg, pte_size, reg_val;
135
136         /* Use ATU base Group5 */
137         pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5;
138         pte_size =  ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5;
139         stream->reg_offset = 0x02000000;
140
141         /* Group Enable */
142         reg_val = rsrc->sram_pte_offset;
143         writel(reg_val | BIT(31), adata->acp_base + pte_reg);
144         writel(PAGE_SIZE_4K_ENABLE,  adata->acp_base + pte_size);
145         writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
146 }
147
148 static void config_acp_dma(struct acp_dev_data *adata, struct acp_stream *stream, int size)
149 {
150         struct snd_pcm_substream *substream = stream->substream;
151         struct acp_resource *rsrc = adata->rsrc;
152         dma_addr_t addr = substream->dma_buffer.addr;
153         int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
154         u32 low, high, val;
155         u16 page_idx;
156
157         val = stream->pte_offset;
158
159         for (page_idx = 0; page_idx < num_pages; page_idx++) {
160                 /* Load the low address of page int ACP SRAM through SRBM */
161                 low = lower_32_bits(addr);
162                 high = upper_32_bits(addr);
163                 writel(low, adata->acp_base + rsrc->scratch_reg_offset + val);
164                 high |= BIT(31);
165                 writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4);
166
167                 /* Move to next physically contiguous page */
168                 val += 8;
169                 addr += PAGE_SIZE;
170         }
171 }
172
173 static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream)
174 {
175         struct snd_pcm_runtime *runtime = substream->runtime;
176         struct device *dev = component->dev;
177         struct acp_dev_data *adata = dev_get_drvdata(dev);
178         struct acp_stream *stream;
179         int ret;
180
181         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
182         if (!stream)
183                 return -ENOMEM;
184
185         stream->substream = substream;
186
187         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
188                 runtime->hw = acp_pcm_hardware_playback;
189         else
190                 runtime->hw = acp_pcm_hardware_capture;
191
192         ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
193         if (ret < 0) {
194                 dev_err(component->dev, "set integer constraint failed\n");
195                 kfree(stream);
196                 return ret;
197         }
198         runtime->private_data = stream;
199
200         writel(1, ACP_EXTERNAL_INTR_ENB(adata));
201
202         spin_lock_irq(&adata->acp_lock);
203         list_add_tail(&stream->list, &adata->stream_list);
204         spin_unlock_irq(&adata->acp_lock);
205
206         return ret;
207 }
208
209 static int acp_dma_hw_params(struct snd_soc_component *component,
210                              struct snd_pcm_substream *substream,
211                              struct snd_pcm_hw_params *params)
212 {
213         struct acp_dev_data *adata = snd_soc_component_get_drvdata(component);
214         struct acp_stream *stream = substream->runtime->private_data;
215         u64 size = params_buffer_bytes(params);
216
217         /* Configure ACP DMA block with params */
218         config_pte_for_stream(adata, stream);
219         config_acp_dma(adata, stream, size);
220
221         return 0;
222 }
223
224 static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
225                                          struct snd_pcm_substream *substream)
226 {
227         struct device *dev = component->dev;
228         struct acp_dev_data *adata = dev_get_drvdata(dev);
229         struct acp_stream *stream = substream->runtime->private_data;
230         u32 pos, buffersize;
231         u64 bytescount;
232
233         buffersize = frames_to_bytes(substream->runtime,
234                                      substream->runtime->buffer_size);
235
236         bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);
237
238         if (bytescount > stream->bytescount)
239                 bytescount -= stream->bytescount;
240
241         pos = do_div(bytescount, buffersize);
242
243         return bytes_to_frames(substream->runtime, pos);
244 }
245
246 static int acp_dma_new(struct snd_soc_component *component,
247                        struct snd_soc_pcm_runtime *rtd)
248 {
249         struct device *parent = component->dev->parent;
250
251         snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
252                                        parent, MIN_BUFFER, MAX_BUFFER);
253         return 0;
254 }
255
256 static int acp_dma_close(struct snd_soc_component *component,
257                          struct snd_pcm_substream *substream)
258 {
259         struct device *dev = component->dev;
260         struct acp_dev_data *adata = dev_get_drvdata(dev);
261         struct acp_stream *stream = substream->runtime->private_data;
262
263         /* Remove entry from list */
264         spin_lock_irq(&adata->acp_lock);
265         list_del(&stream->list);
266         spin_unlock_irq(&adata->acp_lock);
267         kfree(stream);
268
269         return 0;
270 }
271
272 static const struct snd_soc_component_driver acp_pcm_component = {
273         .name                   = DRV_NAME,
274         .open                   = acp_dma_open,
275         .close                  = acp_dma_close,
276         .hw_params              = acp_dma_hw_params,
277         .pointer                = acp_dma_pointer,
278         .pcm_construct          = acp_dma_new,
279         .legacy_dai_naming      = 1,
280 };
281
282 int acp_platform_register(struct device *dev)
283 {
284         struct acp_dev_data *adata = dev_get_drvdata(dev);
285         struct snd_soc_dai_driver;
286         unsigned int status;
287
288         status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler,
289                                   IRQF_SHARED, "ACP_I2S_IRQ", adata);
290         if (status) {
291                 dev_err(dev, "ACP I2S IRQ request failed\n");
292                 return status;
293         }
294
295         status = devm_snd_soc_register_component(dev, &acp_pcm_component,
296                                                  adata->dai_driver,
297                                                  adata->num_dai);
298         if (status) {
299                 dev_err(dev, "Fail to register acp i2s component\n");
300                 return status;
301         }
302
303         INIT_LIST_HEAD(&adata->stream_list);
304         spin_lock_init(&adata->acp_lock);
305
306         return 0;
307 }
308 EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON);
309
310 int acp_platform_unregister(struct device *dev)
311 {
312         struct acp_dev_data *adata = dev_get_drvdata(dev);
313
314         if (adata->mach_dev)
315                 platform_device_unregister(adata->mach_dev);
316         return 0;
317 }
318 EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON);
319
320 MODULE_DESCRIPTION("AMD ACP PCM Driver");
321 MODULE_LICENSE("Dual BSD/GPL");
322 MODULE_ALIAS(DRV_NAME);
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