Merge git://git.kernel.org/pub/scm/linux/kernel/git/perex/alsa
[linux-2.6] / sound / pci / cs5535audio / cs5535audio.c
1 /*
2  * Driver for audio on multifunction CS5535 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 <sound/driver.h>
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
27 #include <linux/init.h>
28 #include <linux/pci.h>
29 #include <linux/slab.h>
30 #include <linux/moduleparam.h>
31 #include <asm/io.h>
32 #include <sound/core.h>
33 #include <sound/control.h>
34 #include <sound/pcm.h>
35 #include <sound/rawmidi.h>
36 #include <sound/ac97_codec.h>
37 #include <sound/initval.h>
38 #include <sound/asoundef.h>
39 #include "cs5535audio.h"
40
41 #define DRIVER_NAME "cs5535audio"
42
43
44 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
45 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
46 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
47
48 static struct pci_device_id snd_cs5535audio_ids[] = {
49         { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO,
50           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },
51         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
52           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },
53         {}
54 };
55
56 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
57
58 static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
59 {
60         unsigned int tmp;
61         do {
62                 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
63                 if (!(tmp & CMD_NEW))
64                         break;
65                 udelay(1);
66         } while (--timeout);
67         if (!timeout)
68                 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
69 }
70
71 static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
72                                                  unsigned short reg)
73 {
74         unsigned int regdata;
75         unsigned int timeout;
76         unsigned int val;
77
78         regdata = ((unsigned int) reg) << 24;
79         regdata |= ACC_CODEC_CNTL_RD_CMD;
80         regdata |= CMD_NEW;
81
82         cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
83         wait_till_cmd_acked(cs5535au, 50);
84
85         timeout = 50;
86         do {
87                 val = cs_readl(cs5535au, ACC_CODEC_STATUS);
88                 if ((val & STS_NEW) && reg == (val >> 24))
89                         break;
90                 udelay(1);
91         } while (--timeout);
92         if (!timeout)
93                 snd_printk(KERN_ERR "Failure reading cs5535 codec\n");
94
95         return (unsigned short) val;
96 }
97
98 static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
99                                         unsigned short reg, unsigned short val)
100 {
101         unsigned int regdata;
102
103         regdata = ((unsigned int) reg) << 24;
104         regdata |= val;
105         regdata &= CMD_MASK;
106         regdata |= CMD_NEW;
107         regdata &= ACC_CODEC_CNTL_WR_CMD;
108
109         cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
110         wait_till_cmd_acked(cs5535au, 50);
111 }
112
113 static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
114                                              unsigned short reg, unsigned short val)
115 {
116         struct cs5535audio *cs5535au = ac97->private_data;
117         snd_cs5535audio_codec_write(cs5535au, reg, val);
118 }
119
120 static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
121                                                       unsigned short reg)
122 {
123         struct cs5535audio *cs5535au = ac97->private_data;
124         return snd_cs5535audio_codec_read(cs5535au, reg);
125 }
126
127 static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
128 {
129         struct snd_card *card = cs5535au->card;
130         struct snd_ac97_bus *pbus;
131         struct snd_ac97_template ac97;
132         int err;
133         static struct snd_ac97_bus_ops ops = {
134                 .write = snd_cs5535audio_ac97_codec_write,
135                 .read = snd_cs5535audio_ac97_codec_read,
136         };
137
138         if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
139                 return err;
140
141         memset(&ac97, 0, sizeof(ac97));
142         ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM;
143         ac97.private_data = cs5535au;
144         ac97.pci = cs5535au->pci;
145
146         if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
147                 snd_printk(KERN_ERR "mixer failed\n");
148                 return err;
149         }
150
151         return 0;
152 }
153
154 static void process_bm0_irq(struct cs5535audio *cs5535au)
155 {
156         u8 bm_stat;
157         spin_lock(&cs5535au->reg_lock);
158         bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
159         spin_unlock(&cs5535au->reg_lock);
160         if (bm_stat & EOP) {
161                 struct cs5535audio_dma *dma;
162                 dma = cs5535au->playback_substream->runtime->private_data;
163                 snd_pcm_period_elapsed(cs5535au->playback_substream);
164         } else {
165                 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
166                                         bm_stat);
167         }
168 }
169
170 static void process_bm1_irq(struct cs5535audio *cs5535au)
171 {
172         u8 bm_stat;
173         spin_lock(&cs5535au->reg_lock);
174         bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
175         spin_unlock(&cs5535au->reg_lock);
176         if (bm_stat & EOP) {
177                 struct cs5535audio_dma *dma;
178                 dma = cs5535au->capture_substream->runtime->private_data;
179                 snd_pcm_period_elapsed(cs5535au->capture_substream);
180         }
181 }
182
183 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id,
184                                              struct pt_regs *regs)
185 {
186         u16 acc_irq_stat;
187         u8 bm_stat;
188         unsigned char count;
189         struct cs5535audio *cs5535au = dev_id;
190
191         if (cs5535au == NULL)
192                 return IRQ_NONE;
193
194         acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
195
196         if (!acc_irq_stat)
197                 return IRQ_NONE;
198         for (count = 0; count < 10; count++) {
199                 if (acc_irq_stat & (1 << count)) {
200                         switch (count) {
201                         case IRQ_STS:
202                                 cs_readl(cs5535au, ACC_GPIO_STATUS);
203                                 break;
204                         case WU_IRQ_STS:
205                                 cs_readl(cs5535au, ACC_GPIO_STATUS);
206                                 break;
207                         case BM0_IRQ_STS:
208                                 process_bm0_irq(cs5535au);
209                                 break;
210                         case BM1_IRQ_STS:
211                                 process_bm1_irq(cs5535au);
212                                 break;
213                         case BM2_IRQ_STS:
214                                 bm_stat = cs_readb(cs5535au, ACC_BM2_STATUS);
215                                 break;
216                         case BM3_IRQ_STS:
217                                 bm_stat = cs_readb(cs5535au, ACC_BM3_STATUS);
218                                 break;
219                         case BM4_IRQ_STS:
220                                 bm_stat = cs_readb(cs5535au, ACC_BM4_STATUS);
221                                 break;
222                         case BM5_IRQ_STS:
223                                 bm_stat = cs_readb(cs5535au, ACC_BM5_STATUS);
224                                 break;
225                         case BM6_IRQ_STS:
226                                 bm_stat = cs_readb(cs5535au, ACC_BM6_STATUS);
227                                 break;
228                         case BM7_IRQ_STS:
229                                 bm_stat = cs_readb(cs5535au, ACC_BM7_STATUS);
230                                 break;
231                         default:
232                                 snd_printk(KERN_ERR "Unexpected irq src\n");
233                                 break;
234                         }
235                 }
236         }
237         return IRQ_HANDLED;
238 }
239
240 static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
241 {
242         synchronize_irq(cs5535au->irq);
243         pci_set_power_state(cs5535au->pci, 3);
244
245         if (cs5535au->irq >= 0)
246                 free_irq(cs5535au->irq, cs5535au);
247
248         pci_release_regions(cs5535au->pci);
249         pci_disable_device(cs5535au->pci);
250         kfree(cs5535au);
251         return 0;
252 }
253
254 static int snd_cs5535audio_dev_free(struct snd_device *device)
255 {
256         struct cs5535audio *cs5535au = device->device_data;
257         return snd_cs5535audio_free(cs5535au);
258 }
259
260 static int __devinit snd_cs5535audio_create(struct snd_card *card,
261                                             struct pci_dev *pci,
262                                             struct cs5535audio **rcs5535au)
263 {
264         struct cs5535audio *cs5535au;
265
266         int err;
267         static struct snd_device_ops ops = {
268                 .dev_free =     snd_cs5535audio_dev_free,
269         };
270
271         *rcs5535au = NULL;
272         if ((err = pci_enable_device(pci)) < 0)
273                 return err;
274
275         if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
276             pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
277                 printk(KERN_WARNING "unable to get 32bit dma\n");
278                 err = -ENXIO;
279                 goto pcifail;
280         }
281
282         cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
283         if (cs5535au == NULL) {
284                 err = -ENOMEM;
285                 goto pcifail;
286         }
287
288         spin_lock_init(&cs5535au->reg_lock);
289         cs5535au->card = card;
290         cs5535au->pci = pci;
291         cs5535au->irq = -1;
292
293         if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
294                 kfree(cs5535au);
295                 goto pcifail;
296         }
297
298         cs5535au->port = pci_resource_start(pci, 0);
299
300         if (request_irq(pci->irq, snd_cs5535audio_interrupt,
301                         SA_INTERRUPT|SA_SHIRQ, "CS5535 Audio", cs5535au)) {
302                 snd_printk("unable to grab IRQ %d\n", pci->irq);
303                 err = -EBUSY;
304                 goto sndfail;
305         }
306
307         cs5535au->irq = pci->irq;
308         pci_set_master(pci);
309
310         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
311                                   cs5535au, &ops)) < 0)
312                 goto sndfail;
313
314         snd_card_set_dev(card, &pci->dev);
315
316         *rcs5535au = cs5535au;
317         return 0;
318
319 sndfail: /* leave the device alive, just kill the snd */
320         snd_cs5535audio_free(cs5535au);
321         return err;
322
323 pcifail:
324         pci_disable_device(pci);
325         return err;
326 }
327
328 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci,
329                                            const struct pci_device_id *pci_id)
330 {
331         static int dev;
332         struct snd_card *card;
333         struct cs5535audio *cs5535au;
334         int err;
335
336         if (dev >= SNDRV_CARDS)
337                 return -ENODEV;
338         if (!enable[dev]) {
339                 dev++;
340                 return -ENOENT;
341         }
342
343         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
344         if (card == NULL)
345                 return -ENOMEM;
346
347         if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
348                 goto probefail_out;
349
350         if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
351                 goto probefail_out;
352
353         if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
354                 goto probefail_out;
355
356         strcpy(card->driver, DRIVER_NAME);
357
358         strcpy(card->shortname, "CS5535 Audio");
359         sprintf(card->longname, "%s %s at 0x%lx, irq %i",
360                 card->shortname, card->driver,
361                 cs5535au->port, cs5535au->irq);
362
363         if ((err = snd_card_register(card)) < 0)
364                 goto probefail_out;
365
366         pci_set_drvdata(pci, card);
367         dev++;
368         return 0;
369
370 probefail_out:
371         snd_card_free(card);
372         return err;
373 }
374
375 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci)
376 {
377         snd_card_free(pci_get_drvdata(pci));
378         pci_set_drvdata(pci, NULL);
379 }
380
381 static struct pci_driver driver = {
382         .name = DRIVER_NAME,
383         .id_table = snd_cs5535audio_ids,
384         .probe = snd_cs5535audio_probe,
385         .remove = __devexit_p(snd_cs5535audio_remove),
386 };
387
388 static int __init alsa_card_cs5535audio_init(void)
389 {
390         return pci_register_driver(&driver);
391 }
392
393 static void __exit alsa_card_cs5535audio_exit(void)
394 {
395         pci_unregister_driver(&driver);
396 }
397
398 module_init(alsa_card_cs5535audio_init)
399 module_exit(alsa_card_cs5535audio_exit)
400
401 MODULE_AUTHOR("Jaya Kumar");
402 MODULE_LICENSE("GPL");
403 MODULE_DESCRIPTION("CS5535 Audio");
404 MODULE_SUPPORTED_DEVICE("CS5535 Audio");