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) 2018 Intel Corporation
7 //
8 // Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
9 // Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
10 // Rander Wang <rander.wang@intel.com>
11 // Keyon Jie <yang.jie@linux.intel.com>
12 //
13
14 /*
15 * Hardware interface for generic Intel audio DSP HDA IP
16 */
17
18 #include <linux/moduleparam.h>
19 #include <sound/hda_register.h>
20 #include <sound/pcm_params.h>
21 #include <trace/events/sof_intel.h>
22 #include "../sof-audio.h"
23 #include "../ops.h"
24 #include "hda.h"
25
26 #define SDnFMT_BASE(x) ((x) << 14)
27 #define SDnFMT_MULT(x) (((x) - 1) << 11)
28 #define SDnFMT_DIV(x) (((x) - 1) << 8)
29 #define SDnFMT_BITS(x) ((x) << 4)
30 #define SDnFMT_CHAN(x) ((x) << 0)
31
32 static bool hda_always_enable_dmi_l1;
33 module_param_named(always_enable_dmi_l1, hda_always_enable_dmi_l1, bool, 0444);
34 MODULE_PARM_DESC(always_enable_dmi_l1, "SOF HDA always enable DMI l1");
35
36 static bool hda_disable_rewinds;
37 module_param_named(disable_rewinds, hda_disable_rewinds, bool, 0444);
38 MODULE_PARM_DESC(disable_rewinds, "SOF HDA disable rewinds");
39
40 u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate)
41 {
42 switch (rate) {
43 case 8000:
44 return SDnFMT_DIV(6);
45 case 9600:
46 return SDnFMT_DIV(5);
47 case 11025:
48 return SDnFMT_BASE(1) | SDnFMT_DIV(4);
49 case 16000:
50 return SDnFMT_DIV(3);
51 case 22050:
52 return SDnFMT_BASE(1) | SDnFMT_DIV(2);
53 case 32000:
54 return SDnFMT_DIV(3) | SDnFMT_MULT(2);
55 case 44100:
56 return SDnFMT_BASE(1);
57 case 48000:
58 return 0;
59 case 88200:
60 return SDnFMT_BASE(1) | SDnFMT_MULT(2);
61 case 96000:
62 return SDnFMT_MULT(2);
63 case 176400:
64 return SDnFMT_BASE(1) | SDnFMT_MULT(4);
65 case 192000:
66 return SDnFMT_MULT(4);
67 default:
68 dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n",
69 rate);
70 return 0; /* use 48KHz if not found */
71 }
72 };
73
74 u32 hda_dsp_get_bits(struct snd_sof_dev *sdev, int sample_bits)
75 {
76 switch (sample_bits) {
77 case 8:
78 return SDnFMT_BITS(0);
79 case 16:
80 return SDnFMT_BITS(1);
81 case 20:
82 return SDnFMT_BITS(2);
83 case 24:
84 return SDnFMT_BITS(3);
85 case 32:
86 return SDnFMT_BITS(4);
87 default:
88 dev_warn(sdev->dev, "can't find %d bits using 16bit\n",
89 sample_bits);
90 return SDnFMT_BITS(1); /* use 16bits format if not found */
91 }
92 };
93
94 int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev,
95 struct snd_pcm_substream *substream,
96 struct snd_pcm_hw_params *params,
97 struct snd_sof_platform_stream_params *platform_params)
98 {
99 struct hdac_stream *hstream = substream->runtime->private_data;
100 struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
101 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
102 struct snd_dma_buffer *dmab;
103 int ret;
104
105 hstream->substream = substream;
106
107 dmab = substream->runtime->dma_buffer_p;
108
109 /*
110 * Use the codec required format val (which is link_bps adjusted) when
111 * the DSP is not in use
112 */
113 if (!sdev->dspless_mode_selected) {
114 u32 rate = hda_dsp_get_mult_div(sdev, params_rate(params));
115 u32 bits = hda_dsp_get_bits(sdev, params_width(params));
116
117 hstream->format_val = rate | bits | (params_channels(params) - 1);
118 }
119
120 hstream->bufsize = params_buffer_bytes(params);
121 hstream->period_bytes = params_period_bytes(params);
122 hstream->no_period_wakeup =
123 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
124 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
125
126 ret = hda_dsp_stream_hw_params(sdev, hext_stream, dmab, params);
127 if (ret < 0) {
128 dev_err(sdev->dev, "error: hdac prepare failed: %d\n", ret);
129 return ret;
130 }
131
132 /* enable SPIB when rewinds are disabled */
133 if (hda_disable_rewinds)
134 hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_ENABLE, 0);
135 else
136 hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_DISABLE, 0);
137
138 if (hda)
139 platform_params->no_ipc_position = hda->no_ipc_position;
140
141 platform_params->stream_tag = hstream->stream_tag;
142
143 return 0;
144 }
145 EXPORT_SYMBOL_NS(hda_dsp_pcm_hw_params, SND_SOC_SOF_INTEL_HDA_COMMON);
146
147 /* update SPIB register with appl position */
148 int hda_dsp_pcm_ack(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
149 {
150 struct hdac_stream *hstream = substream->runtime->private_data;
151 struct snd_pcm_runtime *runtime = substream->runtime;
152 ssize_t appl_pos, buf_size;
153 u32 spib;
154
155 appl_pos = frames_to_bytes(runtime, runtime->control->appl_ptr);
156 buf_size = frames_to_bytes(runtime, runtime->buffer_size);
157
158 spib = appl_pos % buf_size;
159
160 /* Allowable value for SPIB is 1 byte to max buffer size */
161 if (!spib)
162 spib = buf_size;
163
164 sof_io_write(sdev, hstream->spib_addr, spib);
165
166 return 0;
167 }
168 EXPORT_SYMBOL_NS(hda_dsp_pcm_ack, SND_SOC_SOF_INTEL_HDA_COMMON);
169
170 int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev,
171 struct snd_pcm_substream *substream, int cmd)
172 {
173 struct hdac_stream *hstream = substream->runtime->private_data;
174 struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
175
176 return hda_dsp_stream_trigger(sdev, hext_stream, cmd);
177 }
178 EXPORT_SYMBOL_NS(hda_dsp_pcm_trigger, SND_SOC_SOF_INTEL_HDA_COMMON);
179
180 snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev,
181 struct snd_pcm_substream *substream)
182 {
183 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
184 struct snd_soc_component *scomp = sdev->component;
185 struct hdac_stream *hstream = substream->runtime->private_data;
186 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
187 struct snd_sof_pcm *spcm;
188 snd_pcm_uframes_t pos;
189
190 spcm = snd_sof_find_spcm_dai(scomp, rtd);
191 if (!spcm) {
192 dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
193 rtd->dai_link->id);
194 return 0;
195 }
196
197 if (hda && !hda->no_ipc_position) {
198 /* read position from IPC position */
199 pos = spcm->stream[substream->stream].posn.host_posn;
200 goto found;
201 }
202
203 pos = hda_dsp_stream_get_position(hstream, substream->stream, true);
204 found:
205 pos = bytes_to_frames(substream->runtime, pos);
206
207 trace_sof_intel_hda_dsp_pcm(sdev, hstream, substream, pos);
208 return pos;
209 }
210 EXPORT_SYMBOL_NS(hda_dsp_pcm_pointer, SND_SOC_SOF_INTEL_HDA_COMMON);
211
212 int hda_dsp_pcm_open(struct snd_sof_dev *sdev,
213 struct snd_pcm_substream *substream)
214 {
215 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
216 struct snd_pcm_runtime *runtime = substream->runtime;
217 struct snd_soc_component *scomp = sdev->component;
218 struct hdac_ext_stream *dsp_stream;
219 struct snd_sof_pcm *spcm;
220 int direction = substream->stream;
221 u32 flags = 0;
222
223 spcm = snd_sof_find_spcm_dai(scomp, rtd);
224 if (!spcm) {
225 dev_err(sdev->dev, "error: can't find PCM with DAI ID %d\n", rtd->dai_link->id);
226 return -EINVAL;
227 }
228
229 /*
230 * if we want the .ack to work, we need to prevent the control from being mapped.
231 * The status can still be mapped.
232 */
233 if (hda_disable_rewinds)
234 runtime->hw.info |= SNDRV_PCM_INFO_NO_REWINDS | SNDRV_PCM_INFO_SYNC_APPLPTR;
235
236 /*
237 * All playback streams are DMI L1 capable, capture streams need
238 * pause push/release to be disabled
239 */
240 if (hda_always_enable_dmi_l1 && direction == SNDRV_PCM_STREAM_CAPTURE)
241 runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE;
242
243 if (hda_always_enable_dmi_l1 ||
244 direction == SNDRV_PCM_STREAM_PLAYBACK ||
245 spcm->stream[substream->stream].d0i3_compatible)
246 flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE;
247
248 dsp_stream = hda_dsp_stream_get(sdev, direction, flags);
249 if (!dsp_stream) {
250 dev_err(sdev->dev, "error: no stream available\n");
251 return -ENODEV;
252 }
253
254 /* minimum as per HDA spec */
255 snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
256
257 /* avoid circular buffer wrap in middle of period */
258 snd_pcm_hw_constraint_integer(substream->runtime,
259 SNDRV_PCM_HW_PARAM_PERIODS);
260
261 /* Limit the maximum number of periods to not exceed the BDL entries count */
262 if (runtime->hw.periods_max > HDA_DSP_MAX_BDL_ENTRIES)
263 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
264 runtime->hw.periods_min,
265 HDA_DSP_MAX_BDL_ENTRIES);
266
267 /* Only S16 and S32 supported by HDA hardware when used without DSP */
268 if (sdev->dspless_mode_selected)
269 snd_pcm_hw_constraint_mask64(substream->runtime, SNDRV_PCM_HW_PARAM_FORMAT,
270 SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S32);
271
272 /*
273 * The dsp_max_burst_size_in_ms is the length of the maximum burst size
274 * of the host DMA in the ALSA buffer.
275 *
276 * On playback start the DMA will transfer dsp_max_burst_size_in_ms
277 * amount of data in one initial burst to fill up the host DMA buffer.
278 * Consequent DMA burst sizes are shorter and their length can vary.
279 * To make sure that userspace allocate large enough ALSA buffer we need
280 * to place a constraint on the buffer time.
281 *
282 * On capture the DMA will transfer 1ms chunks.
283 *
284 * Exact dsp_max_burst_size_in_ms constraint is racy, so set the
285 * constraint to a minimum of 2x dsp_max_burst_size_in_ms.
286 */
287 if (spcm->stream[direction].dsp_max_burst_size_in_ms)
288 snd_pcm_hw_constraint_minmax(substream->runtime,
289 SNDRV_PCM_HW_PARAM_BUFFER_TIME,
290 spcm->stream[direction].dsp_max_burst_size_in_ms * USEC_PER_MSEC * 2,
291 UINT_MAX);
292
293 /* binding pcm substream to hda stream */
294 substream->runtime->private_data = &dsp_stream->hstream;
295
296 /*
297 * Reset the llp cache values (they are used for LLP compensation in
298 * case the counter is not reset)
299 */
300 dsp_stream->pplcllpl = 0;
301 dsp_stream->pplcllpu = 0;
302
303 return 0;
304 }
305 EXPORT_SYMBOL_NS(hda_dsp_pcm_open, SND_SOC_SOF_INTEL_HDA_COMMON);
306
307 int hda_dsp_pcm_close(struct snd_sof_dev *sdev,
308 struct snd_pcm_substream *substream)
309 {
310 struct hdac_stream *hstream = substream->runtime->private_data;
311 int direction = substream->stream;
312 int ret;
313
314 ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag);
315
316 if (ret) {
317 dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name);
318 return -ENODEV;
319 }
320
321 /* unbinding pcm substream to hda stream */
322 substream->runtime->private_data = NULL;
323 return 0;
324 }
325 EXPORT_SYMBOL_NS(hda_dsp_pcm_close, SND_SOC_SOF_INTEL_HDA_COMMON);
326
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