1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright(c) 2021-2022 Intel Corporation
4 //
5 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
6 // Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
7 //
8
9 #include <sound/compress_driver.h>
10 #include <sound/hdaudio_ext.h>
11 #include <sound/hdaudio.h>
12 #include <sound/soc.h>
13 #include "avs.h"
14 #include "messages.h"
15
16 static int avs_dsp_init_probe(struct avs_dev *adev, union avs_connector_node_id node_id,
17 size_t buffer_size)
18 {
19 struct avs_probe_cfg cfg = {{0}};
20 struct avs_module_entry mentry;
21 u8 dummy;
22 int ret;
23
24 ret = avs_get_module_entry(adev, &AVS_PROBE_MOD_UUID, &mentry);
25 if (ret)
26 return ret;
27
28 /*
29 * Probe module uses no cycles, audio data format and input and output
30 * frame sizes are unused. It is also not owned by any pipeline.
31 */
32 cfg.base.ibs = 1;
33 /* BSS module descriptor is always segment of index=2. */
34 cfg.base.is_pages = mentry.segments[2].flags.length;
35 cfg.gtw_cfg.node_id = node_id;
36 cfg.gtw_cfg.dma_buffer_size = buffer_size;
37
38 return avs_dsp_init_module(adev, mentry.module_id, INVALID_PIPELINE_ID, 0, 0, &cfg,
39 sizeof(cfg), &dummy);
40 }
41
42 static void avs_dsp_delete_probe(struct avs_dev *adev)
43 {
44 struct avs_module_entry mentry;
45 int ret;
46
47 ret = avs_get_module_entry(adev, &AVS_PROBE_MOD_UUID, &mentry);
48 if (!ret)
49 /* There is only ever one probe module instance. */
50 avs_dsp_delete_module(adev, mentry.module_id, 0, INVALID_PIPELINE_ID, 0);
51 }
52
53 static inline struct hdac_ext_stream *avs_compr_get_host_stream(struct snd_compr_stream *cstream)
54 {
55 return cstream->runtime->private_data;
56 }
57
58 static int avs_probe_compr_open(struct snd_compr_stream *cstream, struct snd_soc_dai *dai)
59 {
60 struct avs_dev *adev = to_avs_dev(dai->dev);
61 struct hdac_bus *bus = &adev->base.core;
62 struct hdac_ext_stream *host_stream;
63
64 if (adev->extractor) {
65 dev_err(dai->dev, "Cannot open more than one extractor stream\n");
66 return -EEXIST;
67 }
68
69 host_stream = snd_hdac_ext_cstream_assign(bus, cstream);
70 if (!host_stream) {
71 dev_err(dai->dev, "Failed to assign HDAudio stream for extraction\n");
72 return -EBUSY;
73 }
74
75 adev->extractor = host_stream;
76 hdac_stream(host_stream)->curr_pos = 0;
77 cstream->runtime->private_data = host_stream;
78
79 return 0;
80 }
81
82 static int avs_probe_compr_free(struct snd_compr_stream *cstream, struct snd_soc_dai *dai)
83 {
84 struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream);
85 struct avs_dev *adev = to_avs_dev(dai->dev);
86 struct avs_probe_point_desc *desc;
87 /* Extractor node identifier. */
88 unsigned int vindex = INVALID_NODE_ID.vindex;
89 size_t num_desc;
90 int i, ret;
91
92 /* Disconnect all probe points. */
93 ret = avs_ipc_probe_get_points(adev, &desc, &num_desc);
94 if (ret) {
95 dev_err(dai->dev, "get probe points failed: %d\n", ret);
96 ret = AVS_IPC_RET(ret);
97 goto exit;
98 }
99
100 for (i = 0; i < num_desc; i++)
101 if (desc[i].node_id.vindex == vindex)
102 avs_ipc_probe_disconnect_points(adev, &desc[i].id, 1);
103 kfree(desc);
104
105 exit:
106 if (adev->num_probe_streams) {
107 adev->num_probe_streams--;
108 if (!adev->num_probe_streams) {
109 avs_dsp_delete_probe(adev);
110 avs_dsp_enable_d0ix(adev);
111 }
112 }
113
114 snd_hdac_stream_cleanup(hdac_stream(host_stream));
115 hdac_stream(host_stream)->prepared = 0;
116 snd_hdac_ext_stream_release(host_stream, HDAC_EXT_STREAM_TYPE_HOST);
117
118 snd_compr_free_pages(cstream);
119 adev->extractor = NULL;
120
121 return ret;
122 }
123
124 static int avs_probe_compr_set_params(struct snd_compr_stream *cstream,
125 struct snd_compr_params *params, struct snd_soc_dai *dai)
126 {
127 struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream);
128 struct snd_compr_runtime *rtd = cstream->runtime;
129 struct avs_dev *adev = to_avs_dev(dai->dev);
130 /* compr params do not store bit depth, default to S32_LE. */
131 snd_pcm_format_t format = SNDRV_PCM_FORMAT_S32_LE;
132 unsigned int format_val;
133 int bps, ret;
134
135 hdac_stream(host_stream)->bufsize = 0;
136 hdac_stream(host_stream)->period_bytes = 0;
137 hdac_stream(host_stream)->format_val = 0;
138 cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG;
139 cstream->dma_buffer.dev.dev = adev->dev;
140
141 ret = snd_compr_malloc_pages(cstream, rtd->buffer_size);
142 if (ret < 0)
143 return ret;
144 bps = snd_pcm_format_physical_width(format);
145 if (bps < 0)
146 return bps;
147 format_val = snd_hdac_stream_format(params->codec.ch_out, bps, params->codec.sample_rate);
148 ret = snd_hdac_stream_set_params(hdac_stream(host_stream), format_val);
149 if (ret < 0)
150 return ret;
151 ret = snd_hdac_stream_setup(hdac_stream(host_stream), false);
152 if (ret < 0)
153 return ret;
154
155 hdac_stream(host_stream)->prepared = 1;
156
157 if (!adev->num_probe_streams) {
158 union avs_connector_node_id node_id;
159
160 /* D0ix not allowed during probing. */
161 ret = avs_dsp_disable_d0ix(adev);
162 if (ret)
163 return ret;
164
165 node_id.vindex = hdac_stream(host_stream)->stream_tag - 1;
166 node_id.dma_type = AVS_DMA_HDA_HOST_INPUT;
167
168 ret = avs_dsp_init_probe(adev, node_id, rtd->dma_bytes);
169 if (ret < 0) {
170 dev_err(dai->dev, "probe init failed: %d\n", ret);
171 avs_dsp_enable_d0ix(adev);
172 return ret;
173 }
174 }
175
176 adev->num_probe_streams++;
177 return 0;
178 }
179
180 static int avs_probe_compr_trigger(struct snd_compr_stream *cstream, int cmd,
181 struct snd_soc_dai *dai)
182 {
183 struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream);
184 struct avs_dev *adev = to_avs_dev(dai->dev);
185 struct hdac_bus *bus = &adev->base.core;
186 unsigned long cookie;
187
188 if (!hdac_stream(host_stream)->prepared)
189 return -EPIPE;
190
191 switch (cmd) {
192 case SNDRV_PCM_TRIGGER_START:
193 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
194 case SNDRV_PCM_TRIGGER_RESUME:
195 spin_lock_irqsave(&bus->reg_lock, cookie);
196 snd_hdac_stream_start(hdac_stream(host_stream));
197 spin_unlock_irqrestore(&bus->reg_lock, cookie);
198 break;
199
200 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
201 case SNDRV_PCM_TRIGGER_SUSPEND:
202 case SNDRV_PCM_TRIGGER_STOP:
203 spin_lock_irqsave(&bus->reg_lock, cookie);
204 snd_hdac_stream_stop(hdac_stream(host_stream));
205 spin_unlock_irqrestore(&bus->reg_lock, cookie);
206 break;
207
208 default:
209 return -EINVAL;
210 }
211
212 return 0;
213 }
214
215 static int avs_probe_compr_pointer(struct snd_compr_stream *cstream,
216 struct snd_compr_tstamp *tstamp, struct snd_soc_dai *dai)
217 {
218 struct hdac_ext_stream *host_stream = avs_compr_get_host_stream(cstream);
219 struct snd_soc_pcm_stream *pstream;
220
221 pstream = &dai->driver->capture;
222 tstamp->copied_total = hdac_stream(host_stream)->curr_pos;
223 tstamp->sampling_rate = snd_pcm_rate_bit_to_rate(pstream->rates);
224
225 return 0;
226 }
227
228 static int avs_probe_compr_copy(struct snd_soc_component *comp, struct snd_compr_stream *cstream,
229 char __user *buf, size_t count)
230 {
231 struct snd_compr_runtime *rtd = cstream->runtime;
232 unsigned int offset, n;
233 void *ptr;
234 int ret;
235
236 if (count > rtd->buffer_size)
237 count = rtd->buffer_size;
238
239 div_u64_rem(rtd->total_bytes_transferred, rtd->buffer_size, &offset);
240 ptr = rtd->dma_area + offset;
241 n = rtd->buffer_size - offset;
242
243 if (count < n) {
244 ret = copy_to_user(buf, ptr, count);
245 } else {
246 ret = copy_to_user(buf, ptr, n);
247 ret += copy_to_user(buf + n, rtd->dma_area, count - n);
248 }
249
250 if (ret)
251 return count - ret;
252 return count;
253 }
254
255 static const struct snd_soc_cdai_ops avs_probe_cdai_ops = {
256 .startup = avs_probe_compr_open,
257 .shutdown = avs_probe_compr_free,
258 .set_params = avs_probe_compr_set_params,
259 .trigger = avs_probe_compr_trigger,
260 .pointer = avs_probe_compr_pointer,
261 };
262
263 static const struct snd_soc_dai_ops avs_probe_dai_ops = {
264 .compress_new = snd_soc_new_compress,
265 };
266
267 static const struct snd_compress_ops avs_probe_compress_ops = {
268 .copy = avs_probe_compr_copy,
269 };
270
271 static struct snd_soc_dai_driver probe_cpu_dais[] = {
272 {
273 .name = "Probe Extraction CPU DAI",
274 .cops = &avs_probe_cdai_ops,
275 .ops = &avs_probe_dai_ops,
276 .capture = {
277 .stream_name = "Probe Extraction",
278 .channels_min = 1,
279 .channels_max = 8,
280 .rates = SNDRV_PCM_RATE_48000,
281 .rate_min = 48000,
282 .rate_max = 48000,
283 },
284 },
285 };
286
287 static const struct snd_soc_component_driver avs_probe_component_driver = {
288 .name = "avs-probe-compr",
289 .compress_ops = &avs_probe_compress_ops,
290 .module_get_upon_open = 1, /* increment refcount when a stream is opened */
291 };
292
293 int avs_probe_platform_register(struct avs_dev *adev, const char *name)
294 {
295 return avs_soc_component_register(adev->dev, name, &avs_probe_component_driver,
296 probe_cpu_dais, ARRAY_SIZE(probe_cpu_dais));
297 }
298
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