Commit | Line | Data |
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17467f23 | 1 | /** |
f0fba2ad | 2 | * Freescale MPC8610HPCD ALSA SoC Machine driver |
17467f23 TT |
3 | * |
4 | * Author: Timur Tabi <timur@freescale.com> | |
5 | * | |
f0fba2ad LG |
6 | * Copyright 2007-2010 Freescale Semiconductor, Inc. |
7 | * | |
8 | * This file is licensed under the terms of the GNU General Public License | |
9 | * version 2. This program is licensed "as is" without any warranty of any | |
10 | * kind, whether express or implied. | |
17467f23 TT |
11 | */ |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/interrupt.h> | |
94848654 | 15 | #include <linux/fsl/guts.h> |
5af50730 | 16 | #include <linux/of_address.h> |
17467f23 | 17 | #include <linux/of_device.h> |
38fec727 | 18 | #include <linux/slab.h> |
17467f23 | 19 | #include <sound/soc.h> |
17467f23 | 20 | |
17467f23 TT |
21 | #include "fsl_dma.h" |
22 | #include "fsl_ssi.h" | |
60aae8da | 23 | #include "fsl_utils.h" |
17467f23 | 24 | |
f0fba2ad LG |
25 | /* There's only one global utilities register */ |
26 | static phys_addr_t guts_phys; | |
27 | ||
17467f23 | 28 | /** |
f0fba2ad | 29 | * mpc8610_hpcd_data: machine-specific ASoC device data |
17467f23 TT |
30 | * |
31 | * This structure contains data for a single sound platform device on an | |
32 | * MPC8610 HPCD. Some of the data is taken from the device tree. | |
33 | */ | |
34 | struct mpc8610_hpcd_data { | |
f0fba2ad LG |
35 | struct snd_soc_dai_link dai[2]; |
36 | struct snd_soc_card card; | |
17467f23 TT |
37 | unsigned int dai_format; |
38 | unsigned int codec_clk_direction; | |
39 | unsigned int cpu_clk_direction; | |
40 | unsigned int clk_frequency; | |
f0fba2ad LG |
41 | unsigned int ssi_id; /* 0 = SSI1, 1 = SSI2, etc */ |
42 | unsigned int dma_id[2]; /* 0 = DMA1, 1 = DMA2, etc */ | |
17467f23 | 43 | unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/ |
f0fba2ad | 44 | char codec_dai_name[DAI_NAME_SIZE]; |
f0fba2ad | 45 | char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */ |
17467f23 TT |
46 | }; |
47 | ||
48 | /** | |
f0fba2ad | 49 | * mpc8610_hpcd_machine_probe: initialize the board |
17467f23 | 50 | * |
f0fba2ad | 51 | * This function is used to initialize the board-specific hardware. |
17467f23 TT |
52 | * |
53 | * Here we program the DMACR and PMUXCR registers. | |
54 | */ | |
e7361ec4 | 55 | static int mpc8610_hpcd_machine_probe(struct snd_soc_card *card) |
17467f23 TT |
56 | { |
57 | struct mpc8610_hpcd_data *machine_data = | |
f0fba2ad | 58 | container_of(card, struct mpc8610_hpcd_data, card); |
9cb6abcb | 59 | struct ccsr_guts __iomem *guts; |
17467f23 | 60 | |
9cb6abcb | 61 | guts = ioremap(guts_phys, sizeof(struct ccsr_guts)); |
f0fba2ad LG |
62 | if (!guts) { |
63 | dev_err(card->dev, "could not map global utilities\n"); | |
64 | return -ENOMEM; | |
65 | } | |
17467f23 | 66 | |
f0fba2ad LG |
67 | /* Program the signal routing between the SSI and the DMA */ |
68 | guts_set_dmacr(guts, machine_data->dma_id[0], | |
69 | machine_data->dma_channel_id[0], | |
70 | CCSR_GUTS_DMACR_DEV_SSI); | |
71 | guts_set_dmacr(guts, machine_data->dma_id[1], | |
72 | machine_data->dma_channel_id[1], | |
73 | CCSR_GUTS_DMACR_DEV_SSI); | |
74 | ||
75 | guts_set_pmuxcr_dma(guts, machine_data->dma_id[0], | |
76 | machine_data->dma_channel_id[0], 0); | |
77 | guts_set_pmuxcr_dma(guts, machine_data->dma_id[1], | |
78 | machine_data->dma_channel_id[1], 0); | |
17467f23 | 79 | |
17467f23 TT |
80 | switch (machine_data->ssi_id) { |
81 | case 0: | |
f0fba2ad | 82 | clrsetbits_be32(&guts->pmuxcr, |
17467f23 TT |
83 | CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI); |
84 | break; | |
85 | case 1: | |
f0fba2ad | 86 | clrsetbits_be32(&guts->pmuxcr, |
17467f23 TT |
87 | CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI); |
88 | break; | |
89 | } | |
90 | ||
f0fba2ad LG |
91 | iounmap(guts); |
92 | ||
17467f23 TT |
93 | return 0; |
94 | } | |
95 | ||
96 | /** | |
97 | * mpc8610_hpcd_startup: program the board with various hardware parameters | |
98 | * | |
99 | * This function takes board-specific information, like clock frequencies | |
100 | * and serial data formats, and passes that information to the codec and | |
101 | * transport drivers. | |
102 | */ | |
103 | static int mpc8610_hpcd_startup(struct snd_pcm_substream *substream) | |
104 | { | |
105 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
17467f23 | 106 | struct mpc8610_hpcd_data *machine_data = |
f0fba2ad LG |
107 | container_of(rtd->card, struct mpc8610_hpcd_data, card); |
108 | struct device *dev = rtd->card->dev; | |
17467f23 TT |
109 | int ret = 0; |
110 | ||
17467f23 | 111 | /* Tell the codec driver what the serial protocol is. */ |
f0fba2ad | 112 | ret = snd_soc_dai_set_fmt(rtd->codec_dai, machine_data->dai_format); |
64105cfd | 113 | if (ret < 0) { |
f0fba2ad | 114 | dev_err(dev, "could not set codec driver audio format\n"); |
64105cfd | 115 | return ret; |
17467f23 TT |
116 | } |
117 | ||
118 | /* | |
119 | * Tell the codec driver what the MCLK frequency is, and whether it's | |
120 | * a slave or master. | |
121 | */ | |
f0fba2ad LG |
122 | ret = snd_soc_dai_set_sysclk(rtd->codec_dai, 0, |
123 | machine_data->clk_frequency, | |
124 | machine_data->codec_clk_direction); | |
64105cfd | 125 | if (ret < 0) { |
f0fba2ad | 126 | dev_err(dev, "could not set codec driver clock params\n"); |
64105cfd | 127 | return ret; |
17467f23 TT |
128 | } |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | /** | |
134 | * mpc8610_hpcd_machine_remove: Remove the sound device | |
135 | * | |
136 | * This function is called to remove the sound device for one SSI. We | |
137 | * de-program the DMACR and PMUXCR register. | |
138 | */ | |
e7361ec4 | 139 | static int mpc8610_hpcd_machine_remove(struct snd_soc_card *card) |
17467f23 TT |
140 | { |
141 | struct mpc8610_hpcd_data *machine_data = | |
f0fba2ad | 142 | container_of(card, struct mpc8610_hpcd_data, card); |
9cb6abcb | 143 | struct ccsr_guts __iomem *guts; |
f0fba2ad | 144 | |
9cb6abcb | 145 | guts = ioremap(guts_phys, sizeof(struct ccsr_guts)); |
f0fba2ad LG |
146 | if (!guts) { |
147 | dev_err(card->dev, "could not map global utilities\n"); | |
148 | return -ENOMEM; | |
149 | } | |
17467f23 TT |
150 | |
151 | /* Restore the signal routing */ | |
152 | ||
f0fba2ad LG |
153 | guts_set_dmacr(guts, machine_data->dma_id[0], |
154 | machine_data->dma_channel_id[0], 0); | |
155 | guts_set_dmacr(guts, machine_data->dma_id[1], | |
156 | machine_data->dma_channel_id[1], 0); | |
17467f23 TT |
157 | |
158 | switch (machine_data->ssi_id) { | |
159 | case 0: | |
f0fba2ad | 160 | clrsetbits_be32(&guts->pmuxcr, |
17467f23 TT |
161 | CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA); |
162 | break; | |
163 | case 1: | |
f0fba2ad | 164 | clrsetbits_be32(&guts->pmuxcr, |
83544994 | 165 | CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA); |
17467f23 TT |
166 | break; |
167 | } | |
168 | ||
f0fba2ad LG |
169 | iounmap(guts); |
170 | ||
17467f23 TT |
171 | return 0; |
172 | } | |
173 | ||
174 | /** | |
f0fba2ad | 175 | * mpc8610_hpcd_ops: ASoC machine driver operations |
17467f23 TT |
176 | */ |
177 | static struct snd_soc_ops mpc8610_hpcd_ops = { | |
178 | .startup = mpc8610_hpcd_startup, | |
179 | }; | |
180 | ||
f0fba2ad LG |
181 | /** |
182 | * mpc8610_hpcd_probe: platform probe function for the machine driver | |
183 | * | |
184 | * Although this is a machine driver, the SSI node is the "master" node with | |
185 | * respect to audio hardware connections. Therefore, we create a new ASoC | |
186 | * device for each new SSI node that has a codec attached. | |
187 | */ | |
188 | static int mpc8610_hpcd_probe(struct platform_device *pdev) | |
189 | { | |
190 | struct device *dev = pdev->dev.parent; | |
38fec727 | 191 | /* ssi_pdev is the platform device for the SSI node that probed us */ |
bb18f097 | 192 | struct platform_device *ssi_pdev = to_platform_device(dev); |
38fec727 | 193 | struct device_node *np = ssi_pdev->dev.of_node; |
f0fba2ad | 194 | struct device_node *codec_np = NULL; |
17467f23 | 195 | struct mpc8610_hpcd_data *machine_data; |
17467f23 | 196 | int ret = -ENODEV; |
f0fba2ad LG |
197 | const char *sprop; |
198 | const u32 *iprop; | |
199 | ||
7c59bc55 SG |
200 | /* Find the codec node for this SSI. */ |
201 | codec_np = of_parse_phandle(np, "codec-handle", 0); | |
f0fba2ad LG |
202 | if (!codec_np) { |
203 | dev_err(dev, "invalid codec node\n"); | |
204 | return -EINVAL; | |
205 | } | |
17467f23 TT |
206 | |
207 | machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL); | |
c09f5ca7 JL |
208 | if (!machine_data) { |
209 | ret = -ENOMEM; | |
210 | goto error_alloc; | |
211 | } | |
17467f23 | 212 | |
38fec727 | 213 | machine_data->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev); |
f0fba2ad | 214 | machine_data->dai[0].ops = &mpc8610_hpcd_ops; |
17467f23 | 215 | |
8f549d7e SG |
216 | /* ASoC core can match codec with device node */ |
217 | machine_data->dai[0].codec_of_node = codec_np; | |
17467f23 | 218 | |
f0fba2ad LG |
219 | /* The DAI name from the codec (snd_soc_dai_driver.name) */ |
220 | machine_data->dai[0].codec_dai_name = "cs4270-hifi"; | |
17467f23 | 221 | |
f0fba2ad LG |
222 | /* We register two DAIs per SSI, one for playback and the other for |
223 | * capture. Currently, we only support codecs that have one DAI for | |
224 | * both playback and capture. | |
225 | */ | |
226 | memcpy(&machine_data->dai[1], &machine_data->dai[0], | |
227 | sizeof(struct snd_soc_dai_link)); | |
17467f23 TT |
228 | |
229 | /* Get the device ID */ | |
230 | iprop = of_get_property(np, "cell-index", NULL); | |
231 | if (!iprop) { | |
f0fba2ad | 232 | dev_err(&pdev->dev, "cell-index property not found\n"); |
17467f23 TT |
233 | ret = -EINVAL; |
234 | goto error; | |
235 | } | |
147dfe90 | 236 | machine_data->ssi_id = be32_to_cpup(iprop); |
17467f23 TT |
237 | |
238 | /* Get the serial format and clock direction. */ | |
239 | sprop = of_get_property(np, "fsl,mode", NULL); | |
240 | if (!sprop) { | |
f0fba2ad | 241 | dev_err(&pdev->dev, "fsl,mode property not found\n"); |
17467f23 TT |
242 | ret = -EINVAL; |
243 | goto error; | |
244 | } | |
245 | ||
246 | if (strcasecmp(sprop, "i2s-slave") == 0) { | |
380c8830 TT |
247 | machine_data->dai_format = |
248 | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM; | |
17467f23 TT |
249 | machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT; |
250 | machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN; | |
251 | ||
f0fba2ad | 252 | /* In i2s-slave mode, the codec has its own clock source, so we |
17467f23 TT |
253 | * need to get the frequency from the device tree and pass it to |
254 | * the codec driver. | |
255 | */ | |
256 | iprop = of_get_property(codec_np, "clock-frequency", NULL); | |
257 | if (!iprop || !*iprop) { | |
f0fba2ad LG |
258 | dev_err(&pdev->dev, "codec bus-frequency " |
259 | "property is missing or invalid\n"); | |
17467f23 TT |
260 | ret = -EINVAL; |
261 | goto error; | |
262 | } | |
147dfe90 | 263 | machine_data->clk_frequency = be32_to_cpup(iprop); |
17467f23 | 264 | } else if (strcasecmp(sprop, "i2s-master") == 0) { |
380c8830 TT |
265 | machine_data->dai_format = |
266 | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS; | |
17467f23 TT |
267 | machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; |
268 | machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; | |
269 | } else if (strcasecmp(sprop, "lj-slave") == 0) { | |
380c8830 TT |
270 | machine_data->dai_format = |
271 | SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBM_CFM; | |
17467f23 TT |
272 | machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT; |
273 | machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN; | |
274 | } else if (strcasecmp(sprop, "lj-master") == 0) { | |
380c8830 TT |
275 | machine_data->dai_format = |
276 | SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBS_CFS; | |
17467f23 TT |
277 | machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; |
278 | machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; | |
e5c21571 | 279 | } else if (strcasecmp(sprop, "rj-slave") == 0) { |
380c8830 TT |
280 | machine_data->dai_format = |
281 | SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBM_CFM; | |
17467f23 TT |
282 | machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT; |
283 | machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN; | |
284 | } else if (strcasecmp(sprop, "rj-master") == 0) { | |
380c8830 TT |
285 | machine_data->dai_format = |
286 | SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBS_CFS; | |
17467f23 TT |
287 | machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; |
288 | machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; | |
289 | } else if (strcasecmp(sprop, "ac97-slave") == 0) { | |
380c8830 TT |
290 | machine_data->dai_format = |
291 | SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBM_CFM; | |
17467f23 TT |
292 | machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT; |
293 | machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN; | |
294 | } else if (strcasecmp(sprop, "ac97-master") == 0) { | |
380c8830 TT |
295 | machine_data->dai_format = |
296 | SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBS_CFS; | |
17467f23 TT |
297 | machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; |
298 | machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; | |
299 | } else { | |
f0fba2ad LG |
300 | dev_err(&pdev->dev, |
301 | "unrecognized fsl,mode property '%s'\n", sprop); | |
17467f23 TT |
302 | ret = -EINVAL; |
303 | goto error; | |
304 | } | |
305 | ||
306 | if (!machine_data->clk_frequency) { | |
f0fba2ad | 307 | dev_err(&pdev->dev, "unknown clock frequency\n"); |
17467f23 TT |
308 | ret = -EINVAL; |
309 | goto error; | |
310 | } | |
311 | ||
f0fba2ad LG |
312 | /* Find the playback DMA channel to use. */ |
313 | machine_data->dai[0].platform_name = machine_data->platform_name[0]; | |
60aae8da SG |
314 | ret = fsl_asoc_get_dma_channel(np, "fsl,playback-dma", |
315 | &machine_data->dai[0], | |
316 | &machine_data->dma_channel_id[0], | |
317 | &machine_data->dma_id[0]); | |
17467f23 | 318 | if (ret) { |
f0fba2ad | 319 | dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n"); |
17467f23 TT |
320 | goto error; |
321 | } | |
322 | ||
f0fba2ad LG |
323 | /* Find the capture DMA channel to use. */ |
324 | machine_data->dai[1].platform_name = machine_data->platform_name[1]; | |
60aae8da SG |
325 | ret = fsl_asoc_get_dma_channel(np, "fsl,capture-dma", |
326 | &machine_data->dai[1], | |
327 | &machine_data->dma_channel_id[1], | |
328 | &machine_data->dma_id[1]); | |
f0fba2ad LG |
329 | if (ret) { |
330 | dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n"); | |
17467f23 TT |
331 | goto error; |
332 | } | |
333 | ||
f0fba2ad LG |
334 | /* Initialize our DAI data structure. */ |
335 | machine_data->dai[0].stream_name = "playback"; | |
336 | machine_data->dai[1].stream_name = "capture"; | |
337 | machine_data->dai[0].name = machine_data->dai[0].stream_name; | |
338 | machine_data->dai[1].name = machine_data->dai[1].stream_name; | |
17467f23 | 339 | |
f0fba2ad LG |
340 | machine_data->card.probe = mpc8610_hpcd_machine_probe; |
341 | machine_data->card.remove = mpc8610_hpcd_machine_remove; | |
342 | machine_data->card.name = pdev->name; /* The platform driver name */ | |
13c57e5b TT |
343 | machine_data->card.owner = THIS_MODULE; |
344 | machine_data->card.dev = &pdev->dev; | |
f0fba2ad LG |
345 | machine_data->card.num_links = 2; |
346 | machine_data->card.dai_link = machine_data->dai; | |
17467f23 | 347 | |
f0fba2ad | 348 | /* Register with ASoC */ |
13c57e5b | 349 | ret = snd_soc_register_card(&machine_data->card); |
17467f23 | 350 | if (ret) { |
13c57e5b TT |
351 | dev_err(&pdev->dev, "could not register card\n"); |
352 | goto error; | |
17467f23 TT |
353 | } |
354 | ||
f0fba2ad | 355 | of_node_put(codec_np); |
17467f23 TT |
356 | |
357 | return 0; | |
358 | ||
359 | error: | |
17467f23 | 360 | kfree(machine_data); |
c09f5ca7 JL |
361 | error_alloc: |
362 | of_node_put(codec_np); | |
17467f23 TT |
363 | return ret; |
364 | } | |
365 | ||
366 | /** | |
f0fba2ad | 367 | * mpc8610_hpcd_remove: remove the platform device |
17467f23 | 368 | * |
f0fba2ad | 369 | * This function is called when the platform device is removed. |
17467f23 | 370 | */ |
a0a3d518 | 371 | static int mpc8610_hpcd_remove(struct platform_device *pdev) |
17467f23 | 372 | { |
13c57e5b | 373 | struct snd_soc_card *card = platform_get_drvdata(pdev); |
17467f23 | 374 | struct mpc8610_hpcd_data *machine_data = |
f0fba2ad | 375 | container_of(card, struct mpc8610_hpcd_data, card); |
17467f23 | 376 | |
13c57e5b | 377 | snd_soc_unregister_card(card); |
17467f23 | 378 | kfree(machine_data); |
17467f23 TT |
379 | |
380 | return 0; | |
381 | } | |
382 | ||
f0fba2ad LG |
383 | static struct platform_driver mpc8610_hpcd_driver = { |
384 | .probe = mpc8610_hpcd_probe, | |
a0a3d518 | 385 | .remove = mpc8610_hpcd_remove, |
4018294b | 386 | .driver = { |
2b81ec69 | 387 | /* The name must match 'compatible' property in the device tree, |
f0fba2ad LG |
388 | * in lowercase letters. |
389 | */ | |
390 | .name = "snd-soc-mpc8610hpcd", | |
4018294b | 391 | }, |
17467f23 TT |
392 | }; |
393 | ||
394 | /** | |
f0fba2ad | 395 | * mpc8610_hpcd_init: machine driver initialization. |
17467f23 TT |
396 | * |
397 | * This function is called when this module is loaded. | |
398 | */ | |
399 | static int __init mpc8610_hpcd_init(void) | |
400 | { | |
f0fba2ad LG |
401 | struct device_node *guts_np; |
402 | struct resource res; | |
17467f23 | 403 | |
f0fba2ad | 404 | pr_info("Freescale MPC8610 HPCD ALSA SoC machine driver\n"); |
17467f23 | 405 | |
f0fba2ad LG |
406 | /* Get the physical address of the global utilities registers */ |
407 | guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts"); | |
408 | if (of_address_to_resource(guts_np, 0, &res)) { | |
409 | pr_err("mpc8610-hpcd: missing/invalid global utilities node\n"); | |
410 | return -EINVAL; | |
411 | } | |
412 | guts_phys = res.start; | |
17467f23 | 413 | |
f0fba2ad | 414 | return platform_driver_register(&mpc8610_hpcd_driver); |
17467f23 TT |
415 | } |
416 | ||
417 | /** | |
f0fba2ad | 418 | * mpc8610_hpcd_exit: machine driver exit |
17467f23 TT |
419 | * |
420 | * This function is called when this driver is unloaded. | |
421 | */ | |
422 | static void __exit mpc8610_hpcd_exit(void) | |
423 | { | |
f0fba2ad | 424 | platform_driver_unregister(&mpc8610_hpcd_driver); |
17467f23 TT |
425 | } |
426 | ||
427 | module_init(mpc8610_hpcd_init); | |
428 | module_exit(mpc8610_hpcd_exit); | |
429 | ||
430 | MODULE_AUTHOR("Timur Tabi <timur@freescale.com>"); | |
f0fba2ad LG |
431 | MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC machine driver"); |
432 | MODULE_LICENSE("GPL v2"); |