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fc93ea2f JB |
1 | /* sound/soc/s3c24xx/s3c-ac97.c |
2 | * | |
3 | * ALSA SoC Audio Layer - S3C AC97 Controller driver | |
4 | * Evolved from s3c2443-ac97.c | |
5 | * | |
6 | * Copyright (c) 2010 Samsung Electronics Co. Ltd | |
7 | * Author: Jaswinder Singh <jassi.brar@samsung.com> | |
8 | * Credits: Graeme Gregory, Sean Choi | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/init.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/io.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/clk.h> | |
20 | ||
21 | #include <sound/soc.h> | |
22 | ||
23 | #include <plat/regs-ac97.h> | |
24 | #include <mach/dma.h> | |
25 | #include <plat/audio.h> | |
26 | ||
27 | #include "s3c-dma.h" | |
28 | #include "s3c-ac97.h" | |
29 | ||
30 | #define AC_CMD_ADDR(x) (x << 16) | |
31 | #define AC_CMD_DATA(x) (x & 0xffff) | |
32 | ||
33 | struct s3c_ac97_info { | |
fc93ea2f JB |
34 | struct clk *ac97_clk; |
35 | void __iomem *regs; | |
36 | struct mutex lock; | |
37 | struct completion done; | |
38 | }; | |
39 | static struct s3c_ac97_info s3c_ac97; | |
40 | ||
41 | static struct s3c2410_dma_client s3c_dma_client_out = { | |
42 | .name = "AC97 PCMOut" | |
43 | }; | |
44 | ||
45 | static struct s3c2410_dma_client s3c_dma_client_in = { | |
46 | .name = "AC97 PCMIn" | |
47 | }; | |
48 | ||
49 | static struct s3c2410_dma_client s3c_dma_client_micin = { | |
50 | .name = "AC97 MicIn" | |
51 | }; | |
52 | ||
53 | static struct s3c_dma_params s3c_ac97_pcm_out = { | |
54 | .client = &s3c_dma_client_out, | |
55 | .dma_size = 4, | |
56 | }; | |
57 | ||
58 | static struct s3c_dma_params s3c_ac97_pcm_in = { | |
59 | .client = &s3c_dma_client_in, | |
60 | .dma_size = 4, | |
61 | }; | |
62 | ||
63 | static struct s3c_dma_params s3c_ac97_mic_in = { | |
64 | .client = &s3c_dma_client_micin, | |
65 | .dma_size = 4, | |
66 | }; | |
67 | ||
68 | static void s3c_ac97_activate(struct snd_ac97 *ac97) | |
69 | { | |
70 | u32 ac_glbctrl, stat; | |
71 | ||
72 | stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7; | |
73 | if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE) | |
74 | return; /* Return if already active */ | |
75 | ||
76 | INIT_COMPLETION(s3c_ac97.done); | |
77 | ||
78 | ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
79 | ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON; | |
80 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
81 | msleep(1); | |
82 | ||
83 | ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE; | |
84 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
85 | msleep(1); | |
86 | ||
87 | ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
88 | ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE; | |
89 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
90 | ||
91 | if (!wait_for_completion_timeout(&s3c_ac97.done, HZ)) | |
92 | printk(KERN_ERR "AC97: Unable to activate!"); | |
93 | } | |
94 | ||
95 | static unsigned short s3c_ac97_read(struct snd_ac97 *ac97, | |
96 | unsigned short reg) | |
97 | { | |
98 | u32 ac_glbctrl, ac_codec_cmd; | |
99 | u32 stat, addr, data; | |
100 | ||
101 | mutex_lock(&s3c_ac97.lock); | |
102 | ||
103 | s3c_ac97_activate(ac97); | |
104 | ||
105 | INIT_COMPLETION(s3c_ac97.done); | |
106 | ||
107 | ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD); | |
108 | ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg); | |
109 | writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD); | |
110 | ||
111 | udelay(50); | |
112 | ||
113 | ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
114 | ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE; | |
115 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
116 | ||
117 | if (!wait_for_completion_timeout(&s3c_ac97.done, HZ)) | |
118 | printk(KERN_ERR "AC97: Unable to read!"); | |
119 | ||
120 | stat = readl(s3c_ac97.regs + S3C_AC97_STAT); | |
121 | addr = (stat >> 16) & 0x7f; | |
122 | data = (stat & 0xffff); | |
123 | ||
124 | if (addr != reg) | |
125 | printk(KERN_ERR "s3c-ac97: req addr = %02x, rep addr = %02x\n", reg, addr); | |
126 | ||
127 | mutex_unlock(&s3c_ac97.lock); | |
128 | ||
129 | return (unsigned short)data; | |
130 | } | |
131 | ||
132 | static void s3c_ac97_write(struct snd_ac97 *ac97, unsigned short reg, | |
133 | unsigned short val) | |
134 | { | |
135 | u32 ac_glbctrl, ac_codec_cmd; | |
136 | ||
137 | mutex_lock(&s3c_ac97.lock); | |
138 | ||
139 | s3c_ac97_activate(ac97); | |
140 | ||
141 | INIT_COMPLETION(s3c_ac97.done); | |
142 | ||
143 | ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD); | |
144 | ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val); | |
145 | writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD); | |
146 | ||
147 | udelay(50); | |
148 | ||
149 | ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
150 | ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE; | |
151 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
152 | ||
153 | if (!wait_for_completion_timeout(&s3c_ac97.done, HZ)) | |
154 | printk(KERN_ERR "AC97: Unable to write!"); | |
155 | ||
156 | ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD); | |
157 | ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ; | |
158 | writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD); | |
159 | ||
160 | mutex_unlock(&s3c_ac97.lock); | |
161 | } | |
162 | ||
163 | static void s3c_ac97_cold_reset(struct snd_ac97 *ac97) | |
164 | { | |
165 | writel(S3C_AC97_GLBCTRL_COLDRESET, | |
166 | s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
167 | msleep(1); | |
168 | ||
169 | writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
170 | msleep(1); | |
171 | } | |
172 | ||
173 | static void s3c_ac97_warm_reset(struct snd_ac97 *ac97) | |
174 | { | |
175 | u32 stat; | |
176 | ||
177 | stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7; | |
178 | if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE) | |
179 | return; /* Return if already active */ | |
180 | ||
181 | writel(S3C_AC97_GLBCTRL_WARMRESET, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
182 | msleep(1); | |
183 | ||
184 | writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
185 | msleep(1); | |
186 | ||
187 | s3c_ac97_activate(ac97); | |
188 | } | |
189 | ||
190 | static irqreturn_t s3c_ac97_irq(int irq, void *dev_id) | |
191 | { | |
192 | u32 ac_glbctrl, ac_glbstat; | |
193 | ||
194 | ac_glbstat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT); | |
195 | ||
196 | if (ac_glbstat & S3C_AC97_GLBSTAT_CODECREADY) { | |
197 | ||
198 | ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
199 | ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE; | |
200 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
201 | ||
202 | complete(&s3c_ac97.done); | |
203 | } | |
204 | ||
205 | ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
206 | ac_glbctrl |= (1<<30); /* Clear interrupt */ | |
207 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
208 | ||
209 | return IRQ_HANDLED; | |
210 | } | |
211 | ||
212 | struct snd_ac97_bus_ops soc_ac97_ops = { | |
213 | .read = s3c_ac97_read, | |
214 | .write = s3c_ac97_write, | |
215 | .warm_reset = s3c_ac97_warm_reset, | |
216 | .reset = s3c_ac97_cold_reset, | |
217 | }; | |
218 | EXPORT_SYMBOL_GPL(soc_ac97_ops); | |
219 | ||
220 | static int s3c_ac97_hw_params(struct snd_pcm_substream *substream, | |
221 | struct snd_pcm_hw_params *params, | |
222 | struct snd_soc_dai *dai) | |
223 | { | |
224 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
225 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
5f712b2b | 226 | struct s3c_dma_params *dma_data; |
fc93ea2f JB |
227 | |
228 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
5f712b2b | 229 | dma_data = &s3c_ac97_pcm_out; |
fc93ea2f | 230 | else |
5f712b2b DM |
231 | dma_data = &s3c_ac97_pcm_in; |
232 | ||
233 | snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); | |
fc93ea2f JB |
234 | |
235 | return 0; | |
236 | } | |
237 | ||
238 | static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd, | |
239 | struct snd_soc_dai *dai) | |
240 | { | |
241 | u32 ac_glbctrl; | |
242 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
5f712b2b DM |
243 | struct s3c_dma_params *dma_data = |
244 | snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream); | |
fc93ea2f JB |
245 | |
246 | ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
247 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
248 | ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK; | |
249 | else | |
250 | ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK; | |
251 | ||
252 | switch (cmd) { | |
253 | case SNDRV_PCM_TRIGGER_START: | |
254 | case SNDRV_PCM_TRIGGER_RESUME: | |
255 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
256 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
257 | ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA; | |
258 | else | |
259 | ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA; | |
260 | break; | |
261 | ||
262 | case SNDRV_PCM_TRIGGER_STOP: | |
263 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
264 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
265 | break; | |
266 | } | |
267 | ||
268 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
269 | ||
5f712b2b | 270 | s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED); |
fc93ea2f JB |
271 | |
272 | return 0; | |
273 | } | |
274 | ||
275 | static int s3c_ac97_hw_mic_params(struct snd_pcm_substream *substream, | |
276 | struct snd_pcm_hw_params *params, | |
277 | struct snd_soc_dai *dai) | |
278 | { | |
279 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
280 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
281 | ||
282 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
283 | return -ENODEV; | |
284 | else | |
5f712b2b | 285 | snd_soc_dai_set_dma_data(cpu_dai, substream, &s3c_ac97_mic_in); |
fc93ea2f JB |
286 | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream, | |
291 | int cmd, struct snd_soc_dai *dai) | |
292 | { | |
293 | u32 ac_glbctrl; | |
294 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
5f712b2b DM |
295 | struct s3c_dma_params *dma_data = |
296 | snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream); | |
fc93ea2f JB |
297 | |
298 | ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
299 | ac_glbctrl &= ~S3C_AC97_GLBCTRL_MICINTM_MASK; | |
300 | ||
301 | switch (cmd) { | |
302 | case SNDRV_PCM_TRIGGER_START: | |
303 | case SNDRV_PCM_TRIGGER_RESUME: | |
304 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
305 | ac_glbctrl |= S3C_AC97_GLBCTRL_MICINTM_DMA; | |
306 | break; | |
307 | ||
308 | case SNDRV_PCM_TRIGGER_STOP: | |
309 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
310 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
311 | break; | |
312 | } | |
313 | ||
314 | writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); | |
315 | ||
5f712b2b | 316 | s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED); |
fc93ea2f JB |
317 | |
318 | return 0; | |
319 | } | |
320 | ||
321 | static struct snd_soc_dai_ops s3c_ac97_dai_ops = { | |
322 | .hw_params = s3c_ac97_hw_params, | |
323 | .trigger = s3c_ac97_trigger, | |
324 | }; | |
325 | ||
326 | static struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = { | |
327 | .hw_params = s3c_ac97_hw_mic_params, | |
328 | .trigger = s3c_ac97_mic_trigger, | |
329 | }; | |
330 | ||
331 | struct snd_soc_dai s3c_ac97_dai[] = { | |
332 | [S3C_AC97_DAI_PCM] = { | |
333 | .name = "s3c-ac97", | |
334 | .id = S3C_AC97_DAI_PCM, | |
335 | .ac97_control = 1, | |
336 | .playback = { | |
337 | .stream_name = "AC97 Playback", | |
338 | .channels_min = 2, | |
339 | .channels_max = 2, | |
340 | .rates = SNDRV_PCM_RATE_8000_48000, | |
341 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
342 | .capture = { | |
343 | .stream_name = "AC97 Capture", | |
344 | .channels_min = 2, | |
345 | .channels_max = 2, | |
346 | .rates = SNDRV_PCM_RATE_8000_48000, | |
347 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
348 | .ops = &s3c_ac97_dai_ops, | |
349 | }, | |
350 | [S3C_AC97_DAI_MIC] = { | |
351 | .name = "s3c-ac97-mic", | |
352 | .id = S3C_AC97_DAI_MIC, | |
353 | .ac97_control = 1, | |
354 | .capture = { | |
355 | .stream_name = "AC97 Mic Capture", | |
356 | .channels_min = 1, | |
357 | .channels_max = 1, | |
358 | .rates = SNDRV_PCM_RATE_8000_48000, | |
359 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
360 | .ops = &s3c_ac97_mic_dai_ops, | |
361 | }, | |
362 | }; | |
363 | EXPORT_SYMBOL_GPL(s3c_ac97_dai); | |
364 | ||
365 | static __devinit int s3c_ac97_probe(struct platform_device *pdev) | |
366 | { | |
367 | struct resource *mem_res, *dmatx_res, *dmarx_res, *dmamic_res, *irq_res; | |
368 | struct s3c_audio_pdata *ac97_pdata; | |
369 | int ret; | |
370 | ||
371 | ac97_pdata = pdev->dev.platform_data; | |
372 | if (!ac97_pdata || !ac97_pdata->cfg_gpio) { | |
373 | dev_err(&pdev->dev, "cfg_gpio callback not provided!\n"); | |
374 | return -EINVAL; | |
375 | } | |
376 | ||
377 | /* Check for availability of necessary resource */ | |
378 | dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
379 | if (!dmatx_res) { | |
380 | dev_err(&pdev->dev, "Unable to get AC97-TX dma resource\n"); | |
381 | return -ENXIO; | |
382 | } | |
383 | ||
384 | dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
385 | if (!dmarx_res) { | |
386 | dev_err(&pdev->dev, "Unable to get AC97-RX dma resource\n"); | |
387 | return -ENXIO; | |
388 | } | |
389 | ||
390 | dmamic_res = platform_get_resource(pdev, IORESOURCE_DMA, 2); | |
391 | if (!dmamic_res) { | |
392 | dev_err(&pdev->dev, "Unable to get AC97-MIC dma resource\n"); | |
393 | return -ENXIO; | |
394 | } | |
395 | ||
396 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
397 | if (!mem_res) { | |
398 | dev_err(&pdev->dev, "Unable to get register resource\n"); | |
399 | return -ENXIO; | |
400 | } | |
401 | ||
402 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
403 | if (!irq_res) { | |
404 | dev_err(&pdev->dev, "AC97 IRQ not provided!\n"); | |
405 | return -ENXIO; | |
406 | } | |
407 | ||
408 | if (!request_mem_region(mem_res->start, | |
409 | resource_size(mem_res), "s3c-ac97")) { | |
410 | dev_err(&pdev->dev, "Unable to request register region\n"); | |
411 | return -EBUSY; | |
412 | } | |
413 | ||
414 | s3c_ac97_pcm_out.channel = dmatx_res->start; | |
415 | s3c_ac97_pcm_out.dma_addr = mem_res->start + S3C_AC97_PCM_DATA; | |
416 | s3c_ac97_pcm_in.channel = dmarx_res->start; | |
417 | s3c_ac97_pcm_in.dma_addr = mem_res->start + S3C_AC97_PCM_DATA; | |
418 | s3c_ac97_mic_in.channel = dmamic_res->start; | |
419 | s3c_ac97_mic_in.dma_addr = mem_res->start + S3C_AC97_MIC_DATA; | |
420 | ||
421 | init_completion(&s3c_ac97.done); | |
422 | mutex_init(&s3c_ac97.lock); | |
423 | ||
424 | s3c_ac97.regs = ioremap(mem_res->start, resource_size(mem_res)); | |
425 | if (s3c_ac97.regs == NULL) { | |
426 | dev_err(&pdev->dev, "Unable to ioremap register region\n"); | |
427 | ret = -ENXIO; | |
428 | goto err1; | |
429 | } | |
430 | ||
431 | s3c_ac97.ac97_clk = clk_get(&pdev->dev, "ac97"); | |
432 | if (IS_ERR(s3c_ac97.ac97_clk)) { | |
433 | dev_err(&pdev->dev, "s3c-ac97 failed to get ac97_clock\n"); | |
434 | ret = -ENODEV; | |
435 | goto err2; | |
436 | } | |
437 | clk_enable(s3c_ac97.ac97_clk); | |
438 | ||
439 | if (ac97_pdata->cfg_gpio(pdev)) { | |
440 | dev_err(&pdev->dev, "Unable to configure gpio\n"); | |
441 | ret = -EINVAL; | |
442 | goto err3; | |
443 | } | |
444 | ||
445 | ret = request_irq(irq_res->start, s3c_ac97_irq, | |
446 | IRQF_DISABLED, "AC97", NULL); | |
447 | if (ret < 0) { | |
448 | printk(KERN_ERR "s3c-ac97: interrupt request failed.\n"); | |
449 | goto err4; | |
450 | } | |
451 | ||
452 | s3c_ac97_dai[S3C_AC97_DAI_PCM].dev = &pdev->dev; | |
453 | s3c_ac97_dai[S3C_AC97_DAI_MIC].dev = &pdev->dev; | |
454 | ||
455 | ret = snd_soc_register_dais(s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai)); | |
456 | if (ret) | |
457 | goto err5; | |
458 | ||
459 | return 0; | |
460 | ||
461 | err5: | |
462 | free_irq(irq_res->start, NULL); | |
463 | err4: | |
464 | err3: | |
465 | clk_disable(s3c_ac97.ac97_clk); | |
466 | clk_put(s3c_ac97.ac97_clk); | |
467 | err2: | |
468 | iounmap(s3c_ac97.regs); | |
469 | err1: | |
470 | release_mem_region(mem_res->start, resource_size(mem_res)); | |
471 | ||
472 | return ret; | |
473 | } | |
474 | ||
475 | static __devexit int s3c_ac97_remove(struct platform_device *pdev) | |
476 | { | |
477 | struct resource *mem_res, *irq_res; | |
478 | ||
479 | snd_soc_unregister_dais(s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai)); | |
480 | ||
481 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
482 | if (irq_res) | |
483 | free_irq(irq_res->start, NULL); | |
484 | ||
485 | clk_disable(s3c_ac97.ac97_clk); | |
486 | clk_put(s3c_ac97.ac97_clk); | |
487 | ||
488 | iounmap(s3c_ac97.regs); | |
489 | ||
490 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
491 | if (mem_res) | |
492 | release_mem_region(mem_res->start, resource_size(mem_res)); | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | static struct platform_driver s3c_ac97_driver = { | |
498 | .probe = s3c_ac97_probe, | |
499 | .remove = s3c_ac97_remove, | |
500 | .driver = { | |
501 | .name = "s3c-ac97", | |
502 | .owner = THIS_MODULE, | |
503 | }, | |
504 | }; | |
505 | ||
506 | static int __init s3c_ac97_init(void) | |
507 | { | |
508 | return platform_driver_register(&s3c_ac97_driver); | |
509 | } | |
510 | module_init(s3c_ac97_init); | |
511 | ||
512 | static void __exit s3c_ac97_exit(void) | |
513 | { | |
514 | platform_driver_unregister(&s3c_ac97_driver); | |
515 | } | |
516 | module_exit(s3c_ac97_exit); | |
517 | ||
518 | MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>"); | |
519 | MODULE_DESCRIPTION("AC97 driver for the Samsung SoC"); | |
520 | MODULE_LICENSE("GPL"); |