blob: 982a1c94498344af320b3ce18798f24215474a9a [file] [log] [blame]
Timur Tabi27ef3742010-08-19 17:11:40 -05001/**
2 * Freescale P1022DS ALSA SoC Machine driver
3 *
4 * Author: Timur Tabi <timur@freescale.com>
5 *
6 * Copyright 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.
11 */
12
13#include <linux/module.h>
14#include <linux/interrupt.h>
15#include <linux/of_device.h>
16#include <linux/slab.h>
Timur Tabi61327252011-12-01 19:52:47 -060017#include <linux/of_i2c.h>
Timur Tabi27ef3742010-08-19 17:11:40 -050018#include <sound/soc.h>
19#include <asm/fsl_guts.h>
20
21#include "fsl_dma.h"
22#include "fsl_ssi.h"
23
24/* P1022-specific PMUXCR and DMUXCR bit definitions */
25
26#define CCSR_GUTS_PMUXCR_UART0_I2C1_MASK 0x0001c000
27#define CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI 0x00010000
28#define CCSR_GUTS_PMUXCR_UART0_I2C1_SSI 0x00018000
29
30#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK 0x00000c00
31#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI 0x00000000
32
33#define CCSR_GUTS_DMUXCR_PAD 1 /* DMA controller/channel set to pad */
34#define CCSR_GUTS_DMUXCR_SSI 2 /* DMA controller/channel set to SSI */
35
36/*
37 * Set the DMACR register in the GUTS
38 *
39 * The DMACR register determines the source of initiated transfers for each
40 * channel on each DMA controller. Rather than have a bunch of repetitive
41 * macros for the bit patterns, we just have a function that calculates
42 * them.
43 *
44 * guts: Pointer to GUTS structure
45 * co: The DMA controller (0 or 1)
46 * ch: The channel on the DMA controller (0, 1, 2, or 3)
47 * device: The device to set as the target (CCSR_GUTS_DMUXCR_xxx)
48 */
Timur Tabi9cb6abc2012-03-19 11:06:39 -050049static inline void guts_set_dmuxcr(struct ccsr_guts __iomem *guts,
Timur Tabi27ef3742010-08-19 17:11:40 -050050 unsigned int co, unsigned int ch, unsigned int device)
51{
52 unsigned int shift = 16 + (8 * (1 - co) + 2 * (3 - ch));
53
54 clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
55}
56
57/* There's only one global utilities register */
58static phys_addr_t guts_phys;
59
60#define DAI_NAME_SIZE 32
61
62/**
63 * machine_data: machine-specific ASoC device data
64 *
65 * This structure contains data for a single sound platform device on an
66 * P1022 DS. Some of the data is taken from the device tree.
67 */
68struct machine_data {
69 struct snd_soc_dai_link dai[2];
70 struct snd_soc_card card;
71 unsigned int dai_format;
72 unsigned int codec_clk_direction;
73 unsigned int cpu_clk_direction;
74 unsigned int clk_frequency;
75 unsigned int ssi_id; /* 0 = SSI1, 1 = SSI2, etc */
76 unsigned int dma_id[2]; /* 0 = DMA1, 1 = DMA2, etc */
77 unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
78 char codec_name[DAI_NAME_SIZE];
79 char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */
80};
81
82/**
83 * p1022_ds_machine_probe: initialize the board
84 *
85 * This function is used to initialize the board-specific hardware.
86 *
87 * Here we program the DMACR and PMUXCR registers.
88 */
Mark Browne7361ec2011-01-26 14:17:20 +000089static int p1022_ds_machine_probe(struct snd_soc_card *card)
Timur Tabi27ef3742010-08-19 17:11:40 -050090{
Timur Tabi27ef3742010-08-19 17:11:40 -050091 struct machine_data *mdata =
92 container_of(card, struct machine_data, card);
Timur Tabi9cb6abc2012-03-19 11:06:39 -050093 struct ccsr_guts __iomem *guts;
Timur Tabi27ef3742010-08-19 17:11:40 -050094
Timur Tabi9cb6abc2012-03-19 11:06:39 -050095 guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
Timur Tabi27ef3742010-08-19 17:11:40 -050096 if (!guts) {
97 dev_err(card->dev, "could not map global utilities\n");
98 return -ENOMEM;
99 }
100
101 /* Enable SSI Tx signal */
102 clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
103 CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI);
104
105 /* Enable SSI Rx signal */
106 clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
107 CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI);
108
109 /* Enable DMA Channel for SSI */
110 guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0],
111 CCSR_GUTS_DMUXCR_SSI);
112
113 guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1],
114 CCSR_GUTS_DMUXCR_SSI);
115
116 iounmap(guts);
117
118 return 0;
119}
120
121/**
122 * p1022_ds_startup: program the board with various hardware parameters
123 *
124 * This function takes board-specific information, like clock frequencies
125 * and serial data formats, and passes that information to the codec and
126 * transport drivers.
127 */
128static int p1022_ds_startup(struct snd_pcm_substream *substream)
129{
130 struct snd_soc_pcm_runtime *rtd = substream->private_data;
131 struct machine_data *mdata =
132 container_of(rtd->card, struct machine_data, card);
133 struct device *dev = rtd->card->dev;
134 int ret = 0;
135
136 /* Tell the codec driver what the serial protocol is. */
137 ret = snd_soc_dai_set_fmt(rtd->codec_dai, mdata->dai_format);
138 if (ret < 0) {
139 dev_err(dev, "could not set codec driver audio format\n");
140 return ret;
141 }
142
143 /*
144 * Tell the codec driver what the MCLK frequency is, and whether it's
145 * a slave or master.
146 */
147 ret = snd_soc_dai_set_sysclk(rtd->codec_dai, 0, mdata->clk_frequency,
148 mdata->codec_clk_direction);
149 if (ret < 0) {
150 dev_err(dev, "could not set codec driver clock params\n");
151 return ret;
152 }
153
154 return 0;
155}
156
157/**
158 * p1022_ds_machine_remove: Remove the sound device
159 *
160 * This function is called to remove the sound device for one SSI. We
161 * de-program the DMACR and PMUXCR register.
162 */
Mark Browne7361ec2011-01-26 14:17:20 +0000163static int p1022_ds_machine_remove(struct snd_soc_card *card)
Timur Tabi27ef3742010-08-19 17:11:40 -0500164{
Timur Tabi27ef3742010-08-19 17:11:40 -0500165 struct machine_data *mdata =
166 container_of(card, struct machine_data, card);
Timur Tabi9cb6abc2012-03-19 11:06:39 -0500167 struct ccsr_guts __iomem *guts;
Timur Tabi27ef3742010-08-19 17:11:40 -0500168
Timur Tabi9cb6abc2012-03-19 11:06:39 -0500169 guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
Timur Tabi27ef3742010-08-19 17:11:40 -0500170 if (!guts) {
171 dev_err(card->dev, "could not map global utilities\n");
172 return -ENOMEM;
173 }
174
175 /* Restore the signal routing */
176 clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK);
177 clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK);
178 guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0], 0);
179 guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1], 0);
180
181 iounmap(guts);
182
183 return 0;
184}
185
186/**
187 * p1022_ds_ops: ASoC machine driver operations
188 */
189static struct snd_soc_ops p1022_ds_ops = {
190 .startup = p1022_ds_startup,
191};
192
193/**
194 * get_node_by_phandle_name - get a node by its phandle name
195 *
196 * This function takes a node, the name of a property in that node, and a
197 * compatible string. Assuming the property is a phandle to another node,
198 * it returns that node, (optionally) if that node is compatible.
199 *
200 * If the property is not a phandle, or the node it points to is not compatible
201 * with the specific string, then NULL is returned.
202 */
203static struct device_node *get_node_by_phandle_name(struct device_node *np,
204 const char *name, const char *compatible)
205{
206 np = of_parse_phandle(np, name, 0);
207 if (!np)
208 return NULL;
209
210 if (!of_device_is_compatible(np, compatible)) {
211 of_node_put(np);
212 return NULL;
213 }
214
215 return np;
216}
217
218/**
219 * get_parent_cell_index -- return the cell-index of the parent of a node
220 *
221 * Return the value of the cell-index property of the parent of the given
222 * node. This is used for DMA channel nodes that need to know the DMA ID
223 * of the controller they are on.
224 */
225static int get_parent_cell_index(struct device_node *np)
226{
227 struct device_node *parent = of_get_parent(np);
228 const u32 *iprop;
229 int ret = -1;
230
231 if (!parent)
232 return -1;
233
234 iprop = of_get_property(parent, "cell-index", NULL);
235 if (iprop)
Timur Tabi147dfe92011-06-08 15:02:55 -0500236 ret = be32_to_cpup(iprop);
Timur Tabi27ef3742010-08-19 17:11:40 -0500237
238 of_node_put(parent);
239
240 return ret;
241}
242
243/**
244 * codec_node_dev_name - determine the dev_name for a codec node
245 *
246 * This function determines the dev_name for an I2C node. This is the name
247 * that would be returned by dev_name() if this device_node were part of a
248 * 'struct device' It's ugly and hackish, but it works.
249 *
250 * The dev_name for such devices include the bus number and I2C address. For
251 * example, "cs4270-codec.0-004f".
252 */
253static int codec_node_dev_name(struct device_node *np, char *buf, size_t len)
254{
255 const u32 *iprop;
Timur Tabi61327252011-12-01 19:52:47 -0600256 int addr;
Timur Tabi27ef3742010-08-19 17:11:40 -0500257 char temp[DAI_NAME_SIZE];
Timur Tabi61327252011-12-01 19:52:47 -0600258 struct i2c_client *i2c;
Timur Tabi27ef3742010-08-19 17:11:40 -0500259
260 of_modalias_node(np, temp, DAI_NAME_SIZE);
261
262 iprop = of_get_property(np, "reg", NULL);
263 if (!iprop)
264 return -EINVAL;
265
Timur Tabi147dfe92011-06-08 15:02:55 -0500266 addr = be32_to_cpup(iprop);
Timur Tabi27ef3742010-08-19 17:11:40 -0500267
Timur Tabi61327252011-12-01 19:52:47 -0600268 /* We need the adapter number */
269 i2c = of_find_i2c_device_by_node(np);
270 if (!i2c)
271 return -ENODEV;
Timur Tabi27ef3742010-08-19 17:11:40 -0500272
Timur Tabi61327252011-12-01 19:52:47 -0600273 snprintf(buf, len, "%s.%u-%04x", temp, i2c->adapter->nr, addr);
Timur Tabi27ef3742010-08-19 17:11:40 -0500274
275 return 0;
276}
277
278static int get_dma_channel(struct device_node *ssi_np,
Shawn Guofb1a6452012-02-24 22:09:36 +0800279 const char *name,
Timur Tabi27ef3742010-08-19 17:11:40 -0500280 struct snd_soc_dai_link *dai,
281 unsigned int *dma_channel_id,
282 unsigned int *dma_id)
283{
284 struct resource res;
285 struct device_node *dma_channel_np;
286 const u32 *iprop;
287 int ret;
288
Shawn Guofb1a6452012-02-24 22:09:36 +0800289 dma_channel_np = get_node_by_phandle_name(ssi_np, name,
Timur Tabi27ef3742010-08-19 17:11:40 -0500290 "fsl,ssi-dma-channel");
291 if (!dma_channel_np)
292 return -EINVAL;
293
294 /* Determine the dev_name for the device_node. This code mimics the
295 * behavior of of_device_make_bus_id(). We need this because ASoC uses
296 * the dev_name() of the device to match the platform (DMA) device with
297 * the CPU (SSI) device. It's all ugly and hackish, but it works (for
298 * now).
299 *
300 * dai->platform name should already point to an allocated buffer.
301 */
302 ret = of_address_to_resource(dma_channel_np, 0, &res);
Julia Lawall178b2792011-08-20 09:02:00 +0200303 if (ret) {
304 of_node_put(dma_channel_np);
Timur Tabi27ef3742010-08-19 17:11:40 -0500305 return ret;
Julia Lawall178b2792011-08-20 09:02:00 +0200306 }
Timur Tabi27ef3742010-08-19 17:11:40 -0500307 snprintf((char *)dai->platform_name, DAI_NAME_SIZE, "%llx.%s",
308 (unsigned long long) res.start, dma_channel_np->name);
309
310 iprop = of_get_property(dma_channel_np, "cell-index", NULL);
311 if (!iprop) {
312 of_node_put(dma_channel_np);
313 return -EINVAL;
314 }
315
Timur Tabi147dfe92011-06-08 15:02:55 -0500316 *dma_channel_id = be32_to_cpup(iprop);
Timur Tabi27ef3742010-08-19 17:11:40 -0500317 *dma_id = get_parent_cell_index(dma_channel_np);
318 of_node_put(dma_channel_np);
319
320 return 0;
321}
322
323/**
324 * p1022_ds_probe: platform probe function for the machine driver
325 *
326 * Although this is a machine driver, the SSI node is the "master" node with
327 * respect to audio hardware connections. Therefore, we create a new ASoC
328 * device for each new SSI node that has a codec attached.
329 */
330static int p1022_ds_probe(struct platform_device *pdev)
331{
332 struct device *dev = pdev->dev.parent;
333 /* ssi_pdev is the platform device for the SSI node that probed us */
334 struct platform_device *ssi_pdev =
335 container_of(dev, struct platform_device, dev);
336 struct device_node *np = ssi_pdev->dev.of_node;
337 struct device_node *codec_np = NULL;
338 struct platform_device *sound_device = NULL;
339 struct machine_data *mdata;
340 int ret = -ENODEV;
341 const char *sprop;
342 const u32 *iprop;
343
344 /* Find the codec node for this SSI. */
345 codec_np = of_parse_phandle(np, "codec-handle", 0);
346 if (!codec_np) {
347 dev_err(dev, "could not find codec node\n");
348 return -EINVAL;
349 }
350
351 mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL);
Julia Lawall880b8ff2010-08-31 17:48:56 +0200352 if (!mdata) {
353 ret = -ENOMEM;
354 goto error_put;
355 }
Timur Tabi27ef3742010-08-19 17:11:40 -0500356
357 mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
358 mdata->dai[0].ops = &p1022_ds_ops;
359
360 /* Determine the codec name, it will be used as the codec DAI name */
361 ret = codec_node_dev_name(codec_np, mdata->codec_name, DAI_NAME_SIZE);
362 if (ret) {
363 dev_err(&pdev->dev, "invalid codec node %s\n",
364 codec_np->full_name);
365 ret = -EINVAL;
366 goto error;
367 }
368 mdata->dai[0].codec_name = mdata->codec_name;
369
370 /* We register two DAIs per SSI, one for playback and the other for
371 * capture. We support codecs that have separate DAIs for both playback
372 * and capture.
373 */
374 memcpy(&mdata->dai[1], &mdata->dai[0], sizeof(struct snd_soc_dai_link));
375
376 /* The DAI names from the codec (snd_soc_dai_driver.name) */
377 mdata->dai[0].codec_dai_name = "wm8776-hifi-playback";
378 mdata->dai[1].codec_dai_name = "wm8776-hifi-capture";
379
380 /* Get the device ID */
381 iprop = of_get_property(np, "cell-index", NULL);
382 if (!iprop) {
383 dev_err(&pdev->dev, "cell-index property not found\n");
384 ret = -EINVAL;
385 goto error;
386 }
Timur Tabi147dfe92011-06-08 15:02:55 -0500387 mdata->ssi_id = be32_to_cpup(iprop);
Timur Tabi27ef3742010-08-19 17:11:40 -0500388
389 /* Get the serial format and clock direction. */
390 sprop = of_get_property(np, "fsl,mode", NULL);
391 if (!sprop) {
392 dev_err(&pdev->dev, "fsl,mode property not found\n");
393 ret = -EINVAL;
394 goto error;
395 }
396
397 if (strcasecmp(sprop, "i2s-slave") == 0) {
Timur Tabi70ac07b2012-03-16 16:32:52 -0500398 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
399 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM;
Timur Tabi27ef3742010-08-19 17:11:40 -0500400 mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
401 mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
402
403 /* In i2s-slave mode, the codec has its own clock source, so we
404 * need to get the frequency from the device tree and pass it to
405 * the codec driver.
406 */
407 iprop = of_get_property(codec_np, "clock-frequency", NULL);
408 if (!iprop || !*iprop) {
409 dev_err(&pdev->dev, "codec bus-frequency "
410 "property is missing or invalid\n");
411 ret = -EINVAL;
412 goto error;
413 }
Timur Tabi147dfe92011-06-08 15:02:55 -0500414 mdata->clk_frequency = be32_to_cpup(iprop);
Timur Tabi27ef3742010-08-19 17:11:40 -0500415 } else if (strcasecmp(sprop, "i2s-master") == 0) {
Timur Tabi70ac07b2012-03-16 16:32:52 -0500416 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
417 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
Timur Tabi27ef3742010-08-19 17:11:40 -0500418 mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
419 mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
420 } else if (strcasecmp(sprop, "lj-slave") == 0) {
Timur Tabi70ac07b2012-03-16 16:32:52 -0500421 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
422 SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBM_CFM;
Timur Tabi27ef3742010-08-19 17:11:40 -0500423 mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
424 mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
425 } else if (strcasecmp(sprop, "lj-master") == 0) {
Timur Tabi70ac07b2012-03-16 16:32:52 -0500426 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
427 SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBS_CFS;
Timur Tabi27ef3742010-08-19 17:11:40 -0500428 mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
429 mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
430 } else if (strcasecmp(sprop, "rj-slave") == 0) {
Timur Tabi70ac07b2012-03-16 16:32:52 -0500431 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
432 SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBM_CFM;
Timur Tabi27ef3742010-08-19 17:11:40 -0500433 mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
434 mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
435 } else if (strcasecmp(sprop, "rj-master") == 0) {
Timur Tabi70ac07b2012-03-16 16:32:52 -0500436 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
437 SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBS_CFS;
Timur Tabi27ef3742010-08-19 17:11:40 -0500438 mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
439 mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
440 } else if (strcasecmp(sprop, "ac97-slave") == 0) {
Timur Tabi70ac07b2012-03-16 16:32:52 -0500441 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
442 SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBM_CFM;
Timur Tabi27ef3742010-08-19 17:11:40 -0500443 mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
444 mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
445 } else if (strcasecmp(sprop, "ac97-master") == 0) {
Timur Tabi70ac07b2012-03-16 16:32:52 -0500446 mdata->dai_format = SND_SOC_DAIFMT_NB_NF |
447 SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBS_CFS;
Timur Tabi27ef3742010-08-19 17:11:40 -0500448 mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
449 mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
450 } else {
451 dev_err(&pdev->dev,
452 "unrecognized fsl,mode property '%s'\n", sprop);
453 ret = -EINVAL;
454 goto error;
455 }
456
457 if (!mdata->clk_frequency) {
458 dev_err(&pdev->dev, "unknown clock frequency\n");
459 ret = -EINVAL;
460 goto error;
461 }
462
463 /* Find the playback DMA channel to use. */
464 mdata->dai[0].platform_name = mdata->platform_name[0];
465 ret = get_dma_channel(np, "fsl,playback-dma", &mdata->dai[0],
466 &mdata->dma_channel_id[0],
467 &mdata->dma_id[0]);
468 if (ret) {
469 dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
470 goto error;
471 }
472
473 /* Find the capture DMA channel to use. */
474 mdata->dai[1].platform_name = mdata->platform_name[1];
475 ret = get_dma_channel(np, "fsl,capture-dma", &mdata->dai[1],
476 &mdata->dma_channel_id[1],
477 &mdata->dma_id[1]);
478 if (ret) {
479 dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
480 goto error;
481 }
482
483 /* Initialize our DAI data structure. */
484 mdata->dai[0].stream_name = "playback";
485 mdata->dai[1].stream_name = "capture";
486 mdata->dai[0].name = mdata->dai[0].stream_name;
487 mdata->dai[1].name = mdata->dai[1].stream_name;
488
489 mdata->card.probe = p1022_ds_machine_probe;
490 mdata->card.remove = p1022_ds_machine_remove;
491 mdata->card.name = pdev->name; /* The platform driver name */
492 mdata->card.num_links = 2;
493 mdata->card.dai_link = mdata->dai;
494
495 /* Allocate a new audio platform device structure */
496 sound_device = platform_device_alloc("soc-audio", -1);
497 if (!sound_device) {
498 dev_err(&pdev->dev, "platform device alloc failed\n");
499 ret = -ENOMEM;
500 goto error;
501 }
502
503 /* Associate the card data with the sound device */
504 platform_set_drvdata(sound_device, &mdata->card);
505
506 /* Register with ASoC */
507 ret = platform_device_add(sound_device);
508 if (ret) {
509 dev_err(&pdev->dev, "platform device add failed\n");
510 goto error;
511 }
Axel Lin39a54552010-11-29 14:55:58 +0800512 dev_set_drvdata(&pdev->dev, sound_device);
Timur Tabi27ef3742010-08-19 17:11:40 -0500513
514 of_node_put(codec_np);
515
516 return 0;
517
518error:
Timur Tabi27ef3742010-08-19 17:11:40 -0500519 if (sound_device)
Axel Lind890a1a2011-09-20 15:09:00 +0800520 platform_device_put(sound_device);
Timur Tabi27ef3742010-08-19 17:11:40 -0500521
522 kfree(mdata);
Julia Lawall880b8ff2010-08-31 17:48:56 +0200523error_put:
524 of_node_put(codec_np);
Timur Tabi27ef3742010-08-19 17:11:40 -0500525 return ret;
526}
527
528/**
529 * p1022_ds_remove: remove the platform device
530 *
531 * This function is called when the platform device is removed.
532 */
533static int __devexit p1022_ds_remove(struct platform_device *pdev)
534{
535 struct platform_device *sound_device = dev_get_drvdata(&pdev->dev);
536 struct snd_soc_card *card = platform_get_drvdata(sound_device);
537 struct machine_data *mdata =
538 container_of(card, struct machine_data, card);
539
540 platform_device_unregister(sound_device);
541
542 kfree(mdata);
543 sound_device->dev.platform_data = NULL;
544
545 dev_set_drvdata(&pdev->dev, NULL);
546
547 return 0;
548}
549
550static struct platform_driver p1022_ds_driver = {
551 .probe = p1022_ds_probe,
552 .remove = __devexit_p(p1022_ds_remove),
553 .driver = {
Shawn Guo2b81ec62012-03-09 00:59:46 +0800554 /*
555 * The name must match 'compatible' property in the device tree,
556 * in lowercase letters.
557 */
558 .name = "snd-soc-p1022ds",
Timur Tabi27ef3742010-08-19 17:11:40 -0500559 .owner = THIS_MODULE,
560 },
561};
562
563/**
564 * p1022_ds_init: machine driver initialization.
565 *
566 * This function is called when this module is loaded.
567 */
568static int __init p1022_ds_init(void)
569{
570 struct device_node *guts_np;
571 struct resource res;
Timur Tabi27ef3742010-08-19 17:11:40 -0500572
573 /* Get the physical address of the global utilities registers */
574 guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts");
575 if (of_address_to_resource(guts_np, 0, &res)) {
Timur Tabia806aa92011-12-01 19:52:46 -0600576 pr_err("snd-soc-p1022ds: missing/invalid global utils node\n");
577 of_node_put(guts_np);
Timur Tabi27ef3742010-08-19 17:11:40 -0500578 return -EINVAL;
579 }
580 guts_phys = res.start;
581 of_node_put(guts_np);
582
583 return platform_driver_register(&p1022_ds_driver);
584}
585
586/**
587 * p1022_ds_exit: machine driver exit
588 *
589 * This function is called when this driver is unloaded.
590 */
591static void __exit p1022_ds_exit(void)
592{
593 platform_driver_unregister(&p1022_ds_driver);
594}
595
596module_init(p1022_ds_init);
597module_exit(p1022_ds_exit);
598
599MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
600MODULE_DESCRIPTION("Freescale P1022 DS ALSA SoC machine driver");
601MODULE_LICENSE("GPL v2");