1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // sdw-mockup.c -- a mockup SoundWire codec for tests where only the host
4 // drives the bus.
5 //
6 // Copyright(c) 2021 Intel Corporation
7 //
8 //
9
10 #include <linux/device.h>
11 #include <linux/mod_devicetable.h>
12 #include <linux/module.h>
13 #include <linux/soundwire/sdw.h>
14 #include <linux/soundwire/sdw_type.h>
15 #include <linux/soundwire/sdw_registers.h>
16 #include <sound/core.h>
17 #include <sound/pcm.h>
18 #include <sound/pcm_params.h>
19 #include <sound/sdw.h>
20 #include <sound/soc.h>
21
22 struct sdw_mockup_priv {
23 struct sdw_slave *slave;
24 };
25
sdw_mockup_component_probe(struct snd_soc_component * component)26 static int sdw_mockup_component_probe(struct snd_soc_component *component)
27 {
28 return 0;
29 }
30
sdw_mockup_component_remove(struct snd_soc_component * component)31 static void sdw_mockup_component_remove(struct snd_soc_component *component)
32 {
33 }
34
35 static const struct snd_soc_component_driver snd_soc_sdw_mockup_component = {
36 .probe = sdw_mockup_component_probe,
37 .remove = sdw_mockup_component_remove,
38 .endianness = 1,
39 };
40
sdw_mockup_set_sdw_stream(struct snd_soc_dai * dai,void * sdw_stream,int direction)41 static int sdw_mockup_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
42 int direction)
43 {
44 snd_soc_dai_dma_data_set(dai, direction, sdw_stream);
45
46 return 0;
47 }
48
sdw_mockup_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)49 static void sdw_mockup_shutdown(struct snd_pcm_substream *substream,
50 struct snd_soc_dai *dai)
51 {
52 snd_soc_dai_set_dma_data(dai, substream, NULL);
53 }
54
sdw_mockup_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)55 static int sdw_mockup_pcm_hw_params(struct snd_pcm_substream *substream,
56 struct snd_pcm_hw_params *params,
57 struct snd_soc_dai *dai)
58 {
59 struct snd_soc_component *component = dai->component;
60 struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component);
61 struct sdw_stream_config stream_config = {0};
62 struct sdw_port_config port_config = {0};
63 struct sdw_stream_runtime *sdw_stream = snd_soc_dai_get_dma_data(dai, substream);
64 int ret;
65
66 if (!sdw_stream)
67 return -EINVAL;
68
69 if (!sdw_mockup->slave)
70 return -EINVAL;
71
72 /* SoundWire specific configuration */
73 snd_sdw_params_to_config(substream, params, &stream_config, &port_config);
74
75 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
76 port_config.num = 1;
77 else
78 port_config.num = 8;
79
80 ret = sdw_stream_add_slave(sdw_mockup->slave, &stream_config,
81 &port_config, 1, sdw_stream);
82 if (ret)
83 dev_err(dai->dev, "Unable to configure port\n");
84
85 return ret;
86 }
87
sdw_mockup_pcm_hw_free(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)88 static int sdw_mockup_pcm_hw_free(struct snd_pcm_substream *substream,
89 struct snd_soc_dai *dai)
90 {
91 struct snd_soc_component *component = dai->component;
92 struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component);
93 struct sdw_stream_runtime *sdw_stream = snd_soc_dai_get_dma_data(dai, substream);
94
95 if (!sdw_mockup->slave)
96 return -EINVAL;
97
98 sdw_stream_remove_slave(sdw_mockup->slave, sdw_stream);
99 return 0;
100 }
101
102 static const struct snd_soc_dai_ops sdw_mockup_ops = {
103 .hw_params = sdw_mockup_pcm_hw_params,
104 .hw_free = sdw_mockup_pcm_hw_free,
105 .set_stream = sdw_mockup_set_sdw_stream,
106 .shutdown = sdw_mockup_shutdown,
107 };
108
109 static struct snd_soc_dai_driver sdw_mockup_dai[] = {
110 {
111 .name = "sdw-mockup-aif1",
112 .id = 1,
113 .playback = {
114 .stream_name = "DP1 Playback",
115 .channels_min = 1,
116 .channels_max = 2,
117 },
118 .capture = {
119 .stream_name = "DP8 Capture",
120 .channels_min = 1,
121 .channels_max = 2,
122 },
123 .ops = &sdw_mockup_ops,
124 },
125 };
126
sdw_mockup_update_status(struct sdw_slave * slave,enum sdw_slave_status status)127 static int sdw_mockup_update_status(struct sdw_slave *slave,
128 enum sdw_slave_status status)
129 {
130 return 0;
131 }
132
sdw_mockup_read_prop(struct sdw_slave * slave)133 static int sdw_mockup_read_prop(struct sdw_slave *slave)
134 {
135 struct sdw_slave_prop *prop = &slave->prop;
136 int nval;
137 int i, j;
138 u32 bit;
139 unsigned long addr;
140 struct sdw_dpn_prop *dpn;
141
142 prop->paging_support = false;
143
144 /*
145 * first we need to allocate memory for set bits in port lists
146 * the port allocation is completely arbitrary:
147 * DP0 is not supported
148 * DP1 is sink
149 * DP8 is source
150 */
151 prop->source_ports = BIT(8);
152 prop->sink_ports = BIT(1);
153
154 nval = hweight32(prop->source_ports);
155 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
156 sizeof(*prop->src_dpn_prop),
157 GFP_KERNEL);
158 if (!prop->src_dpn_prop)
159 return -ENOMEM;
160
161 i = 0;
162 dpn = prop->src_dpn_prop;
163 addr = prop->source_ports;
164 for_each_set_bit(bit, &addr, 32) {
165 dpn[i].num = bit;
166 dpn[i].type = SDW_DPN_FULL;
167 dpn[i].simple_ch_prep_sm = true;
168 i++;
169 }
170
171 /* do this again for sink now */
172 nval = hweight32(prop->sink_ports);
173 prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
174 sizeof(*prop->sink_dpn_prop),
175 GFP_KERNEL);
176 if (!prop->sink_dpn_prop)
177 return -ENOMEM;
178
179 j = 0;
180 dpn = prop->sink_dpn_prop;
181 addr = prop->sink_ports;
182 for_each_set_bit(bit, &addr, 32) {
183 dpn[j].num = bit;
184 dpn[j].type = SDW_DPN_FULL;
185 dpn[j].simple_ch_prep_sm = true;
186 j++;
187 }
188
189 prop->simple_clk_stop_capable = true;
190
191 /* wake-up event */
192 prop->wake_capable = 0;
193
194 return 0;
195 }
196
sdw_mockup_bus_config(struct sdw_slave * slave,struct sdw_bus_params * params)197 static int sdw_mockup_bus_config(struct sdw_slave *slave,
198 struct sdw_bus_params *params)
199 {
200 return 0;
201 }
202
sdw_mockup_interrupt_callback(struct sdw_slave * slave,struct sdw_slave_intr_status * status)203 static int sdw_mockup_interrupt_callback(struct sdw_slave *slave,
204 struct sdw_slave_intr_status *status)
205 {
206 return 0;
207 }
208
209 static const struct sdw_slave_ops sdw_mockup_slave_ops = {
210 .read_prop = sdw_mockup_read_prop,
211 .interrupt_callback = sdw_mockup_interrupt_callback,
212 .update_status = sdw_mockup_update_status,
213 .bus_config = sdw_mockup_bus_config,
214 };
215
sdw_mockup_sdw_probe(struct sdw_slave * slave,const struct sdw_device_id * id)216 static int sdw_mockup_sdw_probe(struct sdw_slave *slave,
217 const struct sdw_device_id *id)
218 {
219 struct device *dev = &slave->dev;
220 struct sdw_mockup_priv *sdw_mockup;
221 int ret;
222
223 sdw_mockup = devm_kzalloc(dev, sizeof(*sdw_mockup), GFP_KERNEL);
224 if (!sdw_mockup)
225 return -ENOMEM;
226
227 dev_set_drvdata(dev, sdw_mockup);
228 sdw_mockup->slave = slave;
229
230 slave->is_mockup_device = true;
231
232 ret = devm_snd_soc_register_component(dev,
233 &snd_soc_sdw_mockup_component,
234 sdw_mockup_dai,
235 ARRAY_SIZE(sdw_mockup_dai));
236
237 return ret;
238 }
239
sdw_mockup_sdw_remove(struct sdw_slave * slave)240 static int sdw_mockup_sdw_remove(struct sdw_slave *slave)
241 {
242 return 0;
243 }
244
245 /*
246 * Intel reserved parts ID with the following mapping expected:
247 * 0xAAAA: generic full-duplex codec
248 * 0xAA55: headset codec (mock-up of RT711/RT5682) - full-duplex
249 * 0x55AA: amplifier (mock-up of RT1308/Maxim 98373) - playback only with
250 * IV feedback
251 * 0x5555: mic codec (mock-up of RT715) - capture-only
252 */
253 static const struct sdw_device_id sdw_mockup_id[] = {
254 SDW_SLAVE_ENTRY_EXT(0x0105, 0xAAAA, 0x0, 0, 0),
255 SDW_SLAVE_ENTRY_EXT(0x0105, 0xAA55, 0x0, 0, 0),
256 SDW_SLAVE_ENTRY_EXT(0x0105, 0x55AA, 0x0, 0, 0),
257 SDW_SLAVE_ENTRY_EXT(0x0105, 0x5555, 0x0, 0, 0),
258 {},
259 };
260 MODULE_DEVICE_TABLE(sdw, sdw_mockup_id);
261
262 static struct sdw_driver sdw_mockup_sdw_driver = {
263 .driver = {
264 .name = "sdw-mockup",
265 .owner = THIS_MODULE,
266 },
267 .probe = sdw_mockup_sdw_probe,
268 .remove = sdw_mockup_sdw_remove,
269 .ops = &sdw_mockup_slave_ops,
270 .id_table = sdw_mockup_id,
271 };
272 module_sdw_driver(sdw_mockup_sdw_driver);
273
274 MODULE_DESCRIPTION("ASoC SDW mockup codec driver");
275 MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>");
276 MODULE_LICENSE("GPL");
277