summaryrefslogtreecommitdiff
path: root/sound/pci/cs5535audio/cs5535audio.c
blob: 68db7dec90b3ff716b4c597555aa2e1c4beac018 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Driver for audio on multifunction CS5535/6 companion device
 * Copyright (C) Jaya Kumar
 *
 * Based on Jaroslav Kysela and Takashi Iwai's examples.
 * This work was sponsored by CIS(M) Sdn Bhd.
 */

#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/io.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/rawmidi.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/asoundef.h>
#include "cs5535audio.h"

#define DRIVER_NAME "cs5535audio"

static char *ac97_quirk;
module_param(ac97_quirk, charp, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");

static const struct ac97_quirk ac97_quirks[] = {
#if 0 /* Not yet confirmed if all 5536 boards are HP only */
	{
		.subvendor = PCI_VENDOR_ID_AMD, 
		.subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO, 
		.name = "AMD RDK",     
		.type = AC97_TUNE_HP_ONLY
	},
#endif
	{}
};

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);

static const struct pci_device_id snd_cs5535audio_ids[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
	{}
};

MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);

static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
{
	unsigned int tmp;
	do {
		tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
		if (!(tmp & CMD_NEW))
			break;
		udelay(1);
	} while (--timeout);
	if (!timeout)
		dev_err(cs5535au->card->dev,
			"Failure writing to cs5535 codec\n");
}

static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
						 unsigned short reg)
{
	unsigned int regdata;
	unsigned int timeout;
	unsigned int val;

	regdata = ((unsigned int) reg) << 24;
	regdata |= ACC_CODEC_CNTL_RD_CMD;
	regdata |= CMD_NEW;

	cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
	wait_till_cmd_acked(cs5535au, 50);

	timeout = 50;
	do {
		val = cs_readl(cs5535au, ACC_CODEC_STATUS);
		if ((val & STS_NEW) && reg == (val >> 24))
			break;
		udelay(1);
	} while (--timeout);
	if (!timeout)
		dev_err(cs5535au->card->dev,
			"Failure reading codec reg 0x%x, Last value=0x%x\n",
			reg, val);

	return (unsigned short) val;
}

static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
					unsigned short reg, unsigned short val)
{
	unsigned int regdata;

	regdata = ((unsigned int) reg) << 24;
	regdata |= val;
	regdata &= CMD_MASK;
	regdata |= CMD_NEW;
	regdata &= ACC_CODEC_CNTL_WR_CMD;

	cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
	wait_till_cmd_acked(cs5535au, 50);
}

static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
					     unsigned short reg, unsigned short val)
{
	struct cs5535audio *cs5535au = ac97->private_data;
	snd_cs5535audio_codec_write(cs5535au, reg, val);
}

static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
						      unsigned short reg)
{
	struct cs5535audio *cs5535au = ac97->private_data;
	return snd_cs5535audio_codec_read(cs5535au, reg);
}

static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
{
	struct snd_card *card = cs5535au->card;
	struct snd_ac97_bus *pbus;
	struct snd_ac97_template ac97;
	int err;
	static struct snd_ac97_bus_ops ops = {
		.write = snd_cs5535audio_ac97_codec_write,
		.read = snd_cs5535audio_ac97_codec_read,
	};

	if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
		return err;

	memset(&ac97, 0, sizeof(ac97));
	ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
			| AC97_SCAP_POWER_SAVE;
	ac97.private_data = cs5535au;
	ac97.pci = cs5535au->pci;

	/* set any OLPC-specific scaps */
	olpc_prequirks(card, &ac97);

	if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
		dev_err(card->dev, "mixer failed\n");
		return err;
	}

	snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);

	err = olpc_quirks(card, cs5535au->ac97);
	if (err < 0) {
		dev_err(card->dev, "olpc quirks failed\n");
		return err;
	}

	return 0;
}

static void process_bm0_irq(struct cs5535audio *cs5535au)
{
	u8 bm_stat;
	spin_lock(&cs5535au->reg_lock);
	bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
	spin_unlock(&cs5535au->reg_lock);
	if (bm_stat & EOP) {
		snd_pcm_period_elapsed(cs5535au->playback_substream);
	} else {
		dev_err(cs5535au->card->dev,
			"unexpected bm0 irq src, bm_stat=%x\n",
			bm_stat);
	}
}

static void process_bm1_irq(struct cs5535audio *cs5535au)
{
	u8 bm_stat;
	spin_lock(&cs5535au->reg_lock);
	bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
	spin_unlock(&cs5535au->reg_lock);
	if (bm_stat & EOP)
		snd_pcm_period_elapsed(cs5535au->capture_substream);
}

static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
{
	u16 acc_irq_stat;
	unsigned char count;
	struct cs5535audio *cs5535au = dev_id;

	if (cs5535au == NULL)
		return IRQ_NONE;

	acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);

	if (!acc_irq_stat)
		return IRQ_NONE;
	for (count = 0; count < 4; count++) {
		if (acc_irq_stat & (1 << count)) {
			switch (count) {
			case IRQ_STS:
				cs_readl(cs5535au, ACC_GPIO_STATUS);
				break;
			case WU_IRQ_STS:
				cs_readl(cs5535au, ACC_GPIO_STATUS);
				break;
			case BM0_IRQ_STS:
				process_bm0_irq(cs5535au);
				break;
			case BM1_IRQ_STS:
				process_bm1_irq(cs5535au);
				break;
			default:
				dev_err(cs5535au->card->dev,
					"Unexpected irq src: 0x%x\n",
					acc_irq_stat);
				break;
			}
		}
	}
	return IRQ_HANDLED;
}

static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
{
	synchronize_irq(cs5535au->irq);
	pci_set_power_state(cs5535au->pci, PCI_D3hot);

	if (cs5535au->irq >= 0)
		free_irq(cs5535au->irq, cs5535au);

	pci_release_regions(cs5535au->pci);
	pci_disable_device(cs5535au->pci);
	kfree(cs5535au);
	return 0;
}

static int snd_cs5535audio_dev_free(struct snd_device *device)
{
	struct cs5535audio *cs5535au = device->device_data;
	return snd_cs5535audio_free(cs5535au);
}

static int snd_cs5535audio_create(struct snd_card *card,
				  struct pci_dev *pci,
				  struct cs5535audio **rcs5535au)
{
	struct cs5535audio *cs5535au;

	int err;
	static struct snd_device_ops ops = {
		.dev_free =	snd_cs5535audio_dev_free,
	};

	*rcs5535au = NULL;
	if ((err = pci_enable_device(pci)) < 0)
		return err;

	if (dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0 ||
	    dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) {
		dev_warn(card->dev, "unable to get 32bit dma\n");
		err = -ENXIO;
		goto pcifail;
	}

	cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
	if (cs5535au == NULL) {
		err = -ENOMEM;
		goto pcifail;
	}

	spin_lock_init(&cs5535au->reg_lock);
	cs5535au->card = card;
	cs5535au->pci = pci;
	cs5535au->irq = -1;

	if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
		kfree(cs5535au);
		goto pcifail;
	}

	cs5535au->port = pci_resource_start(pci, 0);

	if (request_irq(pci->irq, snd_cs5535audio_interrupt,
			IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
		err = -EBUSY;
		goto sndfail;
	}

	cs5535au->irq = pci->irq;
	pci_set_master(pci);

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
				  cs5535au, &ops)) < 0)
		goto sndfail;

	*rcs5535au = cs5535au;
	return 0;

sndfail: /* leave the device alive, just kill the snd */
	snd_cs5535audio_free(cs5535au);
	return err;

pcifail:
	pci_disable_device(pci);
	return err;
}

static int snd_cs5535audio_probe(struct pci_dev *pci,
				 const struct pci_device_id *pci_id)
{
	static int dev;
	struct snd_card *card;
	struct cs5535audio *cs5535au;
	int err;

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) {
		dev++;
		return -ENOENT;
	}

	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
			   0, &card);
	if (err < 0)
		return err;

	if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
		goto probefail_out;

	card->private_data = cs5535au;

	if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
		goto probefail_out;

	if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
		goto probefail_out;

	strcpy(card->driver, DRIVER_NAME);

	strcpy(card->shortname, "CS5535 Audio");
	sprintf(card->longname, "%s %s at 0x%lx, irq %i",
		card->shortname, card->driver,
		cs5535au->port, cs5535au->irq);

	if ((err = snd_card_register(card)) < 0)
		goto probefail_out;

	pci_set_drvdata(pci, card);
	dev++;
	return 0;

probefail_out:
	snd_card_free(card);
	return err;
}

static void snd_cs5535audio_remove(struct pci_dev *pci)
{
	olpc_quirks_cleanup();
	snd_card_free(pci_get_drvdata(pci));
}

static struct pci_driver cs5535audio_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_cs5535audio_ids,
	.probe = snd_cs5535audio_probe,
	.remove = snd_cs5535audio_remove,
#ifdef CONFIG_PM_SLEEP
	.driver = {
		.pm = &snd_cs5535audio_pm,
	},
#endif
};

module_pci_driver(cs5535audio_driver);

MODULE_AUTHOR("Jaya Kumar");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("CS5535 Audio");
MODULE_SUPPORTED_DEVICE("CS5535 Audio");