1 /*
2 * Driver for audio on multifunction CS5535/6 companion device
3 * Copyright (C) Jaya Kumar
4 *
5 * Based on Jaroslav Kysela and Takashi Iwai's examples.
6 * This work was sponsored by CIS(M) Sdn Bhd.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/init.h>
27 #include <linux/pci.h>
28 #include <linux/slab.h>
29 #include <linux/moduleparam.h>
30 #include <asm/io.h>
31 #include <sound/core.h>
32 #include <sound/control.h>
33 #include <sound/pcm.h>
34 #include <sound/rawmidi.h>
35 #include <sound/ac97_codec.h>
36 #include <sound/initval.h>
37 #include <sound/asoundef.h>
38 #include "cs5535audio.h"
39
40 #define DRIVER_NAME "cs5535audio"
41
42 static char *ac97_quirk;
43 module_param(ac97_quirk, charp, 0444);
44 MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
45
46 static struct ac97_quirk ac97_quirks[] __devinitdata = {
47 #if 0 /* Not yet confirmed if all 5536 boards are HP only */
48 {
49 .subvendor = PCI_VENDOR_ID_AMD,
50 .subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO,
51 .name = "AMD RDK",
52 .type = AC97_TUNE_HP_ONLY
53 },
54 #endif
55 {}
56 };
57
58 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
59 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
60 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
61
62 module_param_array(index, int, NULL, 0444);
63 MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
64 module_param_array(id, charp, NULL, 0444);
65 MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
66 module_param_array(enable, bool, NULL, 0444);
67 MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
68
69 static struct pci_device_id snd_cs5535audio_ids[] = {
70 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
71 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
72 {}
73 };
74
75 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
76
77 static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
78 {
79 unsigned int tmp;
80 do {
81 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
82 if (!(tmp & CMD_NEW))
83 break;
84 udelay(1);
85 } while (--timeout);
86 if (!timeout)
87 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
88 }
89
90 static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
91 unsigned short reg)
92 {
93 unsigned int regdata;
94 unsigned int timeout;
95 unsigned int val;
96
97 regdata = ((unsigned int) reg) << 24;
98 regdata |= ACC_CODEC_CNTL_RD_CMD;
99 regdata |= CMD_NEW;
100
101 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
102 wait_till_cmd_acked(cs5535au, 50);
103
104 timeout = 50;
105 do {
106 val = cs_readl(cs5535au, ACC_CODEC_STATUS);
107 if ((val & STS_NEW) && reg == (val >> 24))
108 break;
109 udelay(1);
110 } while (--timeout);
111 if (!timeout)
112 snd_printk(KERN_ERR "Failure reading codec reg 0x%x,"
113 "Last value=0x%x\n", reg, val);
114
115 return (unsigned short) val;
116 }
117
118 static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
119 unsigned short reg, unsigned short val)
120 {
121 unsigned int regdata;
122
123 regdata = ((unsigned int) reg) << 24;
124 regdata |= val;
125 regdata &= CMD_MASK;
126 regdata |= CMD_NEW;
127 regdata &= ACC_CODEC_CNTL_WR_CMD;
128
129 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
130 wait_till_cmd_acked(cs5535au, 50);
131 }
132
133 static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
134 unsigned short reg, unsigned short val)
135 {
136 struct cs5535audio *cs5535au = ac97->private_data;
137 snd_cs5535audio_codec_write(cs5535au, reg, val);
138 }
139
140 static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
141 unsigned short reg)
142 {
143 struct cs5535audio *cs5535au = ac97->private_data;
144 return snd_cs5535audio_codec_read(cs5535au, reg);
145 }
146
147 static int __devinit snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
148 {
149 struct snd_card *card = cs5535au->card;
150 struct snd_ac97_bus *pbus;
151 struct snd_ac97_template ac97;
152 int err;
153 static struct snd_ac97_bus_ops ops = {
154 .write = snd_cs5535audio_ac97_codec_write,
155 .read = snd_cs5535audio_ac97_codec_read,
156 };
157
158 if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
159 return err;
160
161 memset(&ac97, 0, sizeof(ac97));
162 ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM;
163 ac97.private_data = cs5535au;
164 ac97.pci = cs5535au->pci;
165
166 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
167 snd_printk(KERN_ERR "mixer failed\n");
168 return err;
169 }
170
171 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
172
173 return 0;
174 }
175
176 static void process_bm0_irq(struct cs5535audio *cs5535au)
177 {
178 u8 bm_stat;
179 spin_lock(&cs5535au->reg_lock);
180 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
181 spin_unlock(&cs5535au->reg_lock);
182 if (bm_stat & EOP) {
183 struct cs5535audio_dma *dma;
184 dma = cs5535au->playback_substream->runtime->private_data;
185 snd_pcm_period_elapsed(cs5535au->playback_substream);
186 } else {
187 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
188 bm_stat);
189 }
190 }
191
192 static void process_bm1_irq(struct cs5535audio *cs5535au)
193 {
194 u8 bm_stat;
195 spin_lock(&cs5535au->reg_lock);
196 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
197 spin_unlock(&cs5535au->reg_lock);
198 if (bm_stat & EOP) {
199 struct cs5535audio_dma *dma;
200 dma = cs5535au->capture_substream->runtime->private_data;
201 snd_pcm_period_elapsed(cs5535au->capture_substream);
202 }
203 }
204
205 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
206 {
207 u16 acc_irq_stat;
208 unsigned char count;
209 struct cs5535audio *cs5535au = dev_id;
210
211 if (cs5535au == NULL)
212 return IRQ_NONE;
213
214 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
215
216 if (!acc_irq_stat)
217 return IRQ_NONE;
218 for (count = 0; count < 4; count++) {
219 if (acc_irq_stat & (1 << count)) {
220 switch (count) {
221 case IRQ_STS:
222 cs_readl(cs5535au, ACC_GPIO_STATUS);
223 break;
224 case WU_IRQ_STS:
225 cs_readl(cs5535au, ACC_GPIO_STATUS);
226 break;
227 case BM0_IRQ_STS:
228 process_bm0_irq(cs5535au);
229 break;
230 case BM1_IRQ_STS:
231 process_bm1_irq(cs5535au);
232 break;
233 default:
234 snd_printk(KERN_ERR "Unexpected irq src: "
235 "0x%x\n", acc_irq_stat);
236 break;
237 }
238 }
239 }
240 return IRQ_HANDLED;
241 }
242
243 static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
244 {
245 synchronize_irq(cs5535au->irq);
246 pci_set_power_state(cs5535au->pci, 3);
247
248 if (cs5535au->irq >= 0)
249 free_irq(cs5535au->irq, cs5535au);
250
251 pci_release_regions(cs5535au->pci);
252 pci_disable_device(cs5535au->pci);
253 kfree(cs5535au);
254 return 0;
255 }
256
257 static int snd_cs5535audio_dev_free(struct snd_device *device)
258 {
259 struct cs5535audio *cs5535au = device->device_data;
260 return snd_cs5535audio_free(cs5535au);
261 }
262
263 static int __devinit snd_cs5535audio_create(struct snd_card *card,
264 struct pci_dev *pci,
265 struct cs5535audio **rcs5535au)
266 {
267 struct cs5535audio *cs5535au;
268
269 int err;
270 static struct snd_device_ops ops = {
271 .dev_free = snd_cs5535audio_dev_free,
272 };
273
274 *rcs5535au = NULL;
275 if ((err = pci_enable_device(pci)) < 0)
276 return err;
277
278 if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
279 pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
280 printk(KERN_WARNING "unable to get 32bit dma\n");
281 err = -ENXIO;
282 goto pcifail;
283 }
284
285 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
286 if (cs5535au == NULL) {
287 err = -ENOMEM;
288 goto pcifail;
289 }
290
291 spin_lock_init(&cs5535au->reg_lock);
292 cs5535au->card = card;
293 cs5535au->pci = pci;
294 cs5535au->irq = -1;
295
296 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
297 kfree(cs5535au);
298 goto pcifail;
299 }
300
301 cs5535au->port = pci_resource_start(pci, 0);
302
303 if (request_irq(pci->irq, snd_cs5535audio_interrupt,
304 IRQF_SHARED, "CS5535 Audio", cs5535au)) {
305 snd_printk("unable to grab IRQ %d\n", pci->irq);
306 err = -EBUSY;
307 goto sndfail;
308 }
309
310 cs5535au->irq = pci->irq;
311 pci_set_master(pci);
312
313 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
314 cs5535au, &ops)) < 0)
315 goto sndfail;
316
317 snd_card_set_dev(card, &pci->dev);
318
319 *rcs5535au = cs5535au;
320 return 0;
321
322 sndfail: /* leave the device alive, just kill the snd */
323 snd_cs5535audio_free(cs5535au);
324 return err;
325
326 pcifail:
327 pci_disable_device(pci);
328 return err;
329 }
330
331 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci,
332 const struct pci_device_id *pci_id)
333 {
334 static int dev;
335 struct snd_card *card;
336 struct cs5535audio *cs5535au;
337 int err;
338
339 if (dev >= SNDRV_CARDS)
340 return -ENODEV;
341 if (!enable[dev]) {
342 dev++;
343 return -ENOENT;
344 }
345
346 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
347 if (card == NULL)
348 return -ENOMEM;
349
350 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
351 goto probefail_out;
352
353 card->private_data = cs5535au;
354
355 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
356 goto probefail_out;
357
358 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
359 goto probefail_out;
360
361 strcpy(card->driver, DRIVER_NAME);
362
363 strcpy(card->shortname, "CS5535 Audio");
364 sprintf(card->longname, "%s %s at 0x%lx, irq %i",
365 card->shortname, card->driver,
366 cs5535au->port, cs5535au->irq);
367
368 if ((err = snd_card_register(card)) < 0)
369 goto probefail_out;
370
371 pci_set_drvdata(pci, card);
372 dev++;
373 return 0;
374
375 probefail_out:
376 snd_card_free(card);
377 return err;
378 }
379
380 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci)
381 {
382 snd_card_free(pci_get_drvdata(pci));
383 pci_set_drvdata(pci, NULL);
384 }
385
386 static struct pci_driver driver = {
387 .name = DRIVER_NAME,
388 .id_table = snd_cs5535audio_ids,
389 .probe = snd_cs5535audio_probe,
390 .remove = __devexit_p(snd_cs5535audio_remove),
391 #ifdef CONFIG_PM
392 .suspend = snd_cs5535audio_suspend,
393 .resume = snd_cs5535audio_resume,
394 #endif
395 };
396
397 static int __init alsa_card_cs5535audio_init(void)
398 {
399 return pci_register_driver(&driver);
400 }
401
402 static void __exit alsa_card_cs5535audio_exit(void)
403 {
404 pci_unregister_driver(&driver);
405 }
406
407 module_init(alsa_card_cs5535audio_init)
408 module_exit(alsa_card_cs5535audio_exit)
409
410 MODULE_AUTHOR("Jaya Kumar");
411 MODULE_LICENSE("GPL");
412 MODULE_DESCRIPTION("CS5535 Audio");
413 MODULE_SUPPORTED_DEVICE("CS5535 Audio");
414
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