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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/soc.h> | |
20 | ||
21 | struct sdw_mockup_priv { | |
22 | struct sdw_slave *slave; | |
23 | }; | |
24 | ||
25 | struct sdw_stream_data { | |
26 | struct sdw_stream_runtime *sdw_stream; | |
27 | }; | |
28 | ||
29 | static int sdw_mockup_component_probe(struct snd_soc_component *component) | |
30 | { | |
31 | return 0; | |
32 | } | |
33 | ||
34 | static void sdw_mockup_component_remove(struct snd_soc_component *component) | |
35 | { | |
36 | } | |
37 | ||
38 | static const struct snd_soc_component_driver snd_soc_sdw_mockup_component = { | |
39 | .probe = sdw_mockup_component_probe, | |
40 | .remove = sdw_mockup_component_remove, | |
41 | }; | |
42 | ||
43 | static int sdw_mockup_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream, | |
44 | int direction) | |
45 | { | |
46 | struct sdw_stream_data *stream; | |
47 | ||
48 | if (!sdw_stream) | |
49 | return 0; | |
50 | ||
51 | stream = kzalloc(sizeof(*stream), GFP_KERNEL); | |
52 | if (!stream) | |
53 | return -ENOMEM; | |
54 | ||
55 | stream->sdw_stream = sdw_stream; | |
56 | ||
57 | /* Use tx_mask or rx_mask to configure stream tag and set dma_data */ | |
58 | if (direction == SNDRV_PCM_STREAM_PLAYBACK) | |
59 | dai->playback_dma_data = stream; | |
60 | else | |
61 | dai->capture_dma_data = stream; | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | static void sdw_mockup_shutdown(struct snd_pcm_substream *substream, | |
67 | struct snd_soc_dai *dai) | |
68 | { | |
69 | struct sdw_stream_data *stream; | |
70 | ||
71 | stream = snd_soc_dai_get_dma_data(dai, substream); | |
72 | snd_soc_dai_set_dma_data(dai, substream, NULL); | |
73 | kfree(stream); | |
74 | } | |
75 | ||
76 | static int sdw_mockup_pcm_hw_params(struct snd_pcm_substream *substream, | |
77 | struct snd_pcm_hw_params *params, | |
78 | struct snd_soc_dai *dai) | |
79 | { | |
80 | struct snd_soc_component *component = dai->component; | |
81 | struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component); | |
82 | struct sdw_stream_config stream_config; | |
83 | struct sdw_port_config port_config; | |
84 | enum sdw_data_direction direction; | |
85 | struct sdw_stream_data *stream; | |
86 | int num_channels; | |
87 | int port; | |
88 | int ret; | |
89 | ||
90 | stream = snd_soc_dai_get_dma_data(dai, substream); | |
91 | if (!stream) | |
92 | return -EINVAL; | |
93 | ||
94 | if (!sdw_mockup->slave) | |
95 | return -EINVAL; | |
96 | ||
97 | /* SoundWire specific configuration */ | |
98 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
99 | direction = SDW_DATA_DIR_RX; | |
100 | port = 1; | |
101 | } else { | |
102 | direction = SDW_DATA_DIR_TX; | |
103 | port = 8; | |
104 | } | |
105 | ||
106 | stream_config.frame_rate = params_rate(params); | |
107 | stream_config.ch_count = params_channels(params); | |
108 | stream_config.bps = snd_pcm_format_width(params_format(params)); | |
109 | stream_config.direction = direction; | |
110 | ||
111 | num_channels = params_channels(params); | |
112 | port_config.ch_mask = (1 << num_channels) - 1; | |
113 | port_config.num = port; | |
114 | ||
115 | ret = sdw_stream_add_slave(sdw_mockup->slave, &stream_config, | |
116 | &port_config, 1, stream->sdw_stream); | |
117 | if (ret) | |
118 | dev_err(dai->dev, "Unable to configure port\n"); | |
119 | ||
120 | return ret; | |
121 | } | |
122 | ||
123 | static int sdw_mockup_pcm_hw_free(struct snd_pcm_substream *substream, | |
124 | struct snd_soc_dai *dai) | |
125 | { | |
126 | struct snd_soc_component *component = dai->component; | |
127 | struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component); | |
128 | struct sdw_stream_data *stream = | |
129 | snd_soc_dai_get_dma_data(dai, substream); | |
130 | ||
131 | if (!sdw_mockup->slave) | |
132 | return -EINVAL; | |
133 | ||
134 | sdw_stream_remove_slave(sdw_mockup->slave, stream->sdw_stream); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static const struct snd_soc_dai_ops sdw_mockup_ops = { | |
139 | .hw_params = sdw_mockup_pcm_hw_params, | |
140 | .hw_free = sdw_mockup_pcm_hw_free, | |
e8444560 | 141 | .set_stream = sdw_mockup_set_sdw_stream, |
81d3d3d0 PLB |
142 | .shutdown = sdw_mockup_shutdown, |
143 | }; | |
144 | ||
145 | static struct snd_soc_dai_driver sdw_mockup_dai[] = { | |
146 | { | |
147 | .name = "sdw-mockup-aif1", | |
148 | .id = 1, | |
149 | .playback = { | |
150 | .stream_name = "DP1 Playback", | |
151 | .channels_min = 1, | |
152 | .channels_max = 2, | |
153 | }, | |
154 | .capture = { | |
155 | .stream_name = "DP8 Capture", | |
156 | .channels_min = 1, | |
157 | .channels_max = 2, | |
158 | }, | |
159 | .ops = &sdw_mockup_ops, | |
160 | }, | |
161 | }; | |
162 | ||
163 | static int sdw_mockup_update_status(struct sdw_slave *slave, | |
164 | enum sdw_slave_status status) | |
165 | { | |
166 | return 0; | |
167 | } | |
168 | ||
169 | static int sdw_mockup_read_prop(struct sdw_slave *slave) | |
170 | { | |
171 | struct sdw_slave_prop *prop = &slave->prop; | |
172 | int nval; | |
173 | int i, j; | |
174 | u32 bit; | |
175 | unsigned long addr; | |
176 | struct sdw_dpn_prop *dpn; | |
177 | ||
178 | prop->paging_support = false; | |
179 | ||
180 | /* | |
181 | * first we need to allocate memory for set bits in port lists | |
182 | * the port allocation is completely arbitrary: | |
183 | * DP0 is not supported | |
184 | * DP1 is sink | |
185 | * DP8 is source | |
186 | */ | |
187 | prop->source_ports = BIT(8); | |
188 | prop->sink_ports = BIT(1); | |
189 | ||
190 | nval = hweight32(prop->source_ports); | |
191 | prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval, | |
192 | sizeof(*prop->src_dpn_prop), | |
193 | GFP_KERNEL); | |
194 | if (!prop->src_dpn_prop) | |
195 | return -ENOMEM; | |
196 | ||
197 | i = 0; | |
198 | dpn = prop->src_dpn_prop; | |
199 | addr = prop->source_ports; | |
200 | for_each_set_bit(bit, &addr, 32) { | |
201 | dpn[i].num = bit; | |
202 | dpn[i].type = SDW_DPN_FULL; | |
203 | dpn[i].simple_ch_prep_sm = true; | |
204 | i++; | |
205 | } | |
206 | ||
207 | /* do this again for sink now */ | |
208 | nval = hweight32(prop->sink_ports); | |
209 | prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval, | |
210 | sizeof(*prop->sink_dpn_prop), | |
211 | GFP_KERNEL); | |
212 | if (!prop->sink_dpn_prop) | |
213 | return -ENOMEM; | |
214 | ||
215 | j = 0; | |
216 | dpn = prop->sink_dpn_prop; | |
217 | addr = prop->sink_ports; | |
218 | for_each_set_bit(bit, &addr, 32) { | |
219 | dpn[j].num = bit; | |
220 | dpn[j].type = SDW_DPN_FULL; | |
221 | dpn[j].simple_ch_prep_sm = true; | |
222 | j++; | |
223 | } | |
224 | ||
225 | prop->simple_clk_stop_capable = true; | |
226 | ||
227 | /* wake-up event */ | |
228 | prop->wake_capable = 0; | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | static int sdw_mockup_bus_config(struct sdw_slave *slave, | |
234 | struct sdw_bus_params *params) | |
235 | { | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static int sdw_mockup_interrupt_callback(struct sdw_slave *slave, | |
240 | struct sdw_slave_intr_status *status) | |
241 | { | |
242 | return 0; | |
243 | } | |
244 | ||
245 | static const struct sdw_slave_ops sdw_mockup_slave_ops = { | |
246 | .read_prop = sdw_mockup_read_prop, | |
247 | .interrupt_callback = sdw_mockup_interrupt_callback, | |
248 | .update_status = sdw_mockup_update_status, | |
249 | .bus_config = sdw_mockup_bus_config, | |
250 | }; | |
251 | ||
252 | static int sdw_mockup_sdw_probe(struct sdw_slave *slave, | |
253 | const struct sdw_device_id *id) | |
254 | { | |
255 | struct device *dev = &slave->dev; | |
256 | struct sdw_mockup_priv *sdw_mockup; | |
257 | int ret; | |
258 | ||
259 | sdw_mockup = devm_kzalloc(dev, sizeof(*sdw_mockup), GFP_KERNEL); | |
260 | if (!sdw_mockup) | |
261 | return -ENOMEM; | |
262 | ||
263 | dev_set_drvdata(dev, sdw_mockup); | |
264 | sdw_mockup->slave = slave; | |
265 | ||
4a7a603c PLB |
266 | slave->is_mockup_device = true; |
267 | ||
81d3d3d0 PLB |
268 | ret = devm_snd_soc_register_component(dev, |
269 | &snd_soc_sdw_mockup_component, | |
270 | sdw_mockup_dai, | |
271 | ARRAY_SIZE(sdw_mockup_dai)); | |
272 | ||
273 | return ret; | |
274 | } | |
275 | ||
276 | static int sdw_mockup_sdw_remove(struct sdw_slave *slave) | |
277 | { | |
278 | return 0; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Intel reserved parts ID with the following mapping expected: | |
283 | * 0xAAAA: generic full-duplex codec | |
284 | * 0xAA55: headset codec (mock-up of RT711/RT5682) - full-duplex | |
285 | * 0x55AA: amplifier (mock-up of RT1308/Maxim 98373) - playback only with | |
286 | * IV feedback | |
287 | * 0x5555: mic codec (mock-up of RT715) - capture-only | |
288 | */ | |
289 | static const struct sdw_device_id sdw_mockup_id[] = { | |
290 | SDW_SLAVE_ENTRY_EXT(0x0105, 0xAAAA, 0x0, 0, 0), | |
291 | SDW_SLAVE_ENTRY_EXT(0x0105, 0xAA55, 0x0, 0, 0), | |
292 | SDW_SLAVE_ENTRY_EXT(0x0105, 0x55AA, 0x0, 0, 0), | |
293 | SDW_SLAVE_ENTRY_EXT(0x0105, 0x5555, 0x0, 0, 0), | |
294 | {}, | |
295 | }; | |
296 | MODULE_DEVICE_TABLE(sdw, sdw_mockup_id); | |
297 | ||
298 | static struct sdw_driver sdw_mockup_sdw_driver = { | |
299 | .driver = { | |
300 | .name = "sdw-mockup", | |
301 | .owner = THIS_MODULE, | |
302 | }, | |
303 | .probe = sdw_mockup_sdw_probe, | |
304 | .remove = sdw_mockup_sdw_remove, | |
305 | .ops = &sdw_mockup_slave_ops, | |
306 | .id_table = sdw_mockup_id, | |
307 | }; | |
308 | module_sdw_driver(sdw_mockup_sdw_driver); | |
309 | ||
310 | MODULE_DESCRIPTION("ASoC SDW mockup codec driver"); | |
311 | MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>"); | |
312 | MODULE_LICENSE("GPL"); |