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. All rights reserved.
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 = IS_ENABLED(CONFIG_SND_SOC_SOF_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 
hda_dsp_get_mult_div(struct snd_sof_dev * sdev,int rate)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 
hda_dsp_get_bits(struct snd_sof_dev * sdev,int sample_bits)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 
hda_dsp_pcm_hw_params(struct snd_sof_dev * sdev,struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_sof_platform_stream_params * platform_params)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 	u32 size, rate, bits;
105 
106 	size = params_buffer_bytes(params);
107 	rate = hda_dsp_get_mult_div(sdev, params_rate(params));
108 	bits = hda_dsp_get_bits(sdev, params_width(params));
109 
110 	hstream->substream = substream;
111 
112 	dmab = substream->runtime->dma_buffer_p;
113 
114 	hstream->format_val = rate | bits | (params_channels(params) - 1);
115 	hstream->bufsize = size;
116 	hstream->period_bytes = params_period_bytes(params);
117 	hstream->no_period_wakeup  =
118 			(params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
119 			(params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
120 
121 	ret = hda_dsp_stream_hw_params(sdev, hext_stream, dmab, params);
122 	if (ret < 0) {
123 		dev_err(sdev->dev, "error: hdac prepare failed: %d\n", ret);
124 		return ret;
125 	}
126 
127 	/* enable SPIB when rewinds are disabled */
128 	if (hda_disable_rewinds)
129 		hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_ENABLE, 0);
130 	else
131 		hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_DISABLE, 0);
132 
133 	if (hda)
134 		platform_params->no_ipc_position = hda->no_ipc_position;
135 
136 	platform_params->stream_tag = hstream->stream_tag;
137 
138 	return 0;
139 }
140 
141 /* update SPIB register with appl position */
hda_dsp_pcm_ack(struct snd_sof_dev * sdev,struct snd_pcm_substream * substream)142 int hda_dsp_pcm_ack(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
143 {
144 	struct hdac_stream *hstream = substream->runtime->private_data;
145 	struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
146 	struct snd_pcm_runtime *runtime = substream->runtime;
147 	ssize_t appl_pos, buf_size;
148 	u32 spib;
149 
150 	appl_pos = frames_to_bytes(runtime, runtime->control->appl_ptr);
151 	buf_size = frames_to_bytes(runtime, runtime->buffer_size);
152 
153 	spib = appl_pos % buf_size;
154 
155 	/* Allowable value for SPIB is 1 byte to max buffer size */
156 	if (!spib)
157 		spib = buf_size;
158 
159 	sof_io_write(sdev, hext_stream->spib_addr, spib);
160 
161 	return 0;
162 }
163 
hda_dsp_pcm_trigger(struct snd_sof_dev * sdev,struct snd_pcm_substream * substream,int cmd)164 int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev,
165 			struct snd_pcm_substream *substream, int cmd)
166 {
167 	struct hdac_stream *hstream = substream->runtime->private_data;
168 	struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
169 
170 	return hda_dsp_stream_trigger(sdev, hext_stream, cmd);
171 }
172 
hda_dsp_pcm_pointer(struct snd_sof_dev * sdev,struct snd_pcm_substream * substream)173 snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev,
174 				      struct snd_pcm_substream *substream)
175 {
176 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
177 	struct snd_soc_component *scomp = sdev->component;
178 	struct hdac_stream *hstream = substream->runtime->private_data;
179 	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
180 	struct snd_sof_pcm *spcm;
181 	snd_pcm_uframes_t pos;
182 
183 	spcm = snd_sof_find_spcm_dai(scomp, rtd);
184 	if (!spcm) {
185 		dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
186 				     rtd->dai_link->id);
187 		return 0;
188 	}
189 
190 	if (hda && !hda->no_ipc_position) {
191 		/* read position from IPC position */
192 		pos = spcm->stream[substream->stream].posn.host_posn;
193 		goto found;
194 	}
195 
196 	pos = hda_dsp_stream_get_position(hstream, substream->stream, true);
197 found:
198 	pos = bytes_to_frames(substream->runtime, pos);
199 
200 	trace_sof_intel_hda_dsp_pcm(sdev, hstream, substream, pos);
201 	return pos;
202 }
203 
hda_dsp_pcm_open(struct snd_sof_dev * sdev,struct snd_pcm_substream * substream)204 int hda_dsp_pcm_open(struct snd_sof_dev *sdev,
205 		     struct snd_pcm_substream *substream)
206 {
207 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
208 	struct snd_pcm_runtime *runtime = substream->runtime;
209 	struct snd_soc_component *scomp = sdev->component;
210 	struct hdac_ext_stream *dsp_stream;
211 	struct snd_sof_pcm *spcm;
212 	int direction = substream->stream;
213 	u32 flags = 0;
214 
215 	spcm = snd_sof_find_spcm_dai(scomp, rtd);
216 	if (!spcm) {
217 		dev_err(sdev->dev, "error: can't find PCM with DAI ID %d\n", rtd->dai_link->id);
218 		return -EINVAL;
219 	}
220 
221 	/*
222 	 * if we want the .ack to work, we need to prevent the control from being mapped.
223 	 * The status can still be mapped.
224 	 */
225 	if (hda_disable_rewinds)
226 		runtime->hw.info |= SNDRV_PCM_INFO_NO_REWINDS | SNDRV_PCM_INFO_SYNC_APPLPTR;
227 
228 	/*
229 	 * All playback streams are DMI L1 capable, capture streams need
230 	 * pause push/release to be disabled
231 	 */
232 	if (hda_always_enable_dmi_l1 && direction == SNDRV_PCM_STREAM_CAPTURE)
233 		runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE;
234 
235 	if (hda_always_enable_dmi_l1 ||
236 	    direction == SNDRV_PCM_STREAM_PLAYBACK ||
237 	    spcm->stream[substream->stream].d0i3_compatible)
238 		flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE;
239 
240 	dsp_stream = hda_dsp_stream_get(sdev, direction, flags);
241 	if (!dsp_stream) {
242 		dev_err(sdev->dev, "error: no stream available\n");
243 		return -ENODEV;
244 	}
245 
246 	/* minimum as per HDA spec */
247 	snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
248 
249 	/* avoid circular buffer wrap in middle of period */
250 	snd_pcm_hw_constraint_integer(substream->runtime,
251 				      SNDRV_PCM_HW_PARAM_PERIODS);
252 
253 	/* binding pcm substream to hda stream */
254 	substream->runtime->private_data = &dsp_stream->hstream;
255 	return 0;
256 }
257 
hda_dsp_pcm_close(struct snd_sof_dev * sdev,struct snd_pcm_substream * substream)258 int hda_dsp_pcm_close(struct snd_sof_dev *sdev,
259 		      struct snd_pcm_substream *substream)
260 {
261 	struct hdac_stream *hstream = substream->runtime->private_data;
262 	int direction = substream->stream;
263 	int ret;
264 
265 	ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag);
266 
267 	if (ret) {
268 		dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name);
269 		return -ENODEV;
270 	}
271 
272 	/* unbinding pcm substream to hda stream */
273 	substream->runtime->private_data = NULL;
274 	return 0;
275 }
276