2 * Driver for audio on multifunction CS5535 companion device
3 * Copyright (C) Jaya Kumar
5 * Based on Jaroslav Kysela and Takashi Iwai's examples.
6 * This work was sponsored by CIS(M) Sdn Bhd.
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.
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.
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
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>
31 #include <sound/driver.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"
41 #define DRIVER_NAME "cs5535audio"
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;
48 static struct pci_device_id snd_cs5535audio_ids[] = {
49 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO, PCI_ANY_ID,
50 PCI_ANY_ID, 0, 0, 0, },
54 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
56 static void wait_till_cmd_acked(cs5535audio_t *cs5535au, unsigned long timeout)
60 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
66 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
69 static unsigned short snd_cs5535audio_codec_read(cs5535audio_t *cs5535au,
72 unsigned long regdata;
73 unsigned long timeout;
76 regdata = ((unsigned long) reg) << 24;
77 regdata |= ACC_CODEC_CNTL_RD_CMD;
80 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
81 wait_till_cmd_acked(cs5535au, 500);
85 val = cs_readl(cs5535au, ACC_CODEC_STATUS);
86 if ( (val & STS_NEW) &&
87 ((unsigned long) reg == ((0xFF000000 & val)>>24)) )
92 snd_printk(KERN_ERR "Failure reading cs5535 codec\n");
94 return ((unsigned short) val);
97 static void snd_cs5535audio_codec_write(cs5535audio_t *cs5535au,
98 unsigned short reg, unsigned short val)
100 unsigned long regdata;
102 regdata = ((unsigned long) reg) << 24;
103 regdata |= (unsigned long) val;
106 regdata &= ACC_CODEC_CNTL_WR_CMD;
108 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
109 wait_till_cmd_acked(cs5535au, 50);
112 static void snd_cs5535audio_ac97_codec_write(ac97_t *ac97,
113 unsigned short reg, unsigned short val)
115 cs5535audio_t *cs5535au = ac97->private_data;
116 snd_cs5535audio_codec_write(cs5535au, reg, val);
119 static unsigned short snd_cs5535audio_ac97_codec_read(ac97_t *ac97,
122 cs5535audio_t *cs5535au = ac97->private_data;
123 return snd_cs5535audio_codec_read(cs5535au, reg);
126 static void snd_cs5535audio_mixer_free_ac97(ac97_t *ac97)
128 cs5535audio_t *cs5535audio = ac97->private_data;
129 cs5535audio->ac97 = NULL;
132 static int snd_cs5535audio_mixer(cs5535audio_t *cs5535au)
134 snd_card_t *card = cs5535au->card;
136 ac97_template_t ac97;
138 static ac97_bus_ops_t ops = {
139 .write = snd_cs5535audio_ac97_codec_write,
140 .read = snd_cs5535audio_ac97_codec_read,
143 if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
146 memset(&ac97, 0, sizeof(ac97));
147 ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM;
148 ac97.private_data = cs5535au;
149 ac97.pci = cs5535au->pci;
150 ac97.private_free = snd_cs5535audio_mixer_free_ac97;
152 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
153 snd_printk("mixer failed\n");
160 static void process_bm0_irq(cs5535audio_t *cs5535au)
163 spin_lock(&cs5535au->reg_lock);
164 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
165 spin_unlock(&cs5535au->reg_lock);
167 cs5535audio_dma_t *dma;
168 dma = cs5535au->playback_substream->runtime->private_data;
169 snd_pcm_period_elapsed(cs5535au->playback_substream);
171 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
176 static void process_bm1_irq(cs5535audio_t *cs5535au)
179 spin_lock(&cs5535au->reg_lock);
180 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
181 spin_unlock(&cs5535au->reg_lock);
183 cs5535audio_dma_t *dma;
184 dma = cs5535au->capture_substream->runtime->private_data;
185 snd_pcm_period_elapsed(cs5535au->capture_substream);
189 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id,
190 struct pt_regs *regs)
195 cs5535audio_t *cs5535au = dev_id;
197 if (cs5535au == NULL)
200 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
204 for (count=0; count < 10; count++) {
205 if (acc_irq_stat & (1<<count)) {
208 cs_readl(cs5535au, ACC_GPIO_STATUS);
211 cs_readl(cs5535au, ACC_GPIO_STATUS);
214 process_bm0_irq(cs5535au);
217 process_bm1_irq(cs5535au);
220 bm_stat = cs_readb(cs5535au, ACC_BM2_STATUS);
223 bm_stat = cs_readb(cs5535au, ACC_BM3_STATUS);
226 bm_stat = cs_readb(cs5535au, ACC_BM4_STATUS);
229 bm_stat = cs_readb(cs5535au, ACC_BM5_STATUS);
232 bm_stat = cs_readb(cs5535au, ACC_BM6_STATUS);
235 bm_stat = cs_readb(cs5535au, ACC_BM7_STATUS);
238 snd_printk(KERN_ERR "Unexpected irq src\n");
246 static int snd_cs5535audio_free(cs5535audio_t *cs5535au)
248 synchronize_irq(cs5535au->irq);
249 pci_set_power_state(cs5535au->pci, 3);
251 if (cs5535au->irq >= 0)
252 free_irq(cs5535au->irq, cs5535au);
254 pci_release_regions(cs5535au->pci);
255 pci_disable_device(cs5535au->pci);
260 static int snd_cs5535audio_dev_free(snd_device_t *device)
262 cs5535audio_t *cs5535au = device->device_data;
263 return snd_cs5535audio_free(cs5535au);
266 static int __devinit snd_cs5535audio_create(snd_card_t *card,
268 cs5535audio_t **rcs5535au)
270 cs5535audio_t *cs5535au;
273 static snd_device_ops_t ops = {
274 .dev_free = snd_cs5535audio_dev_free,
278 if ((err = pci_enable_device(pci)) < 0)
281 if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
282 pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
283 printk(KERN_WARNING "unable to get 32bit dma\n");
288 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
289 if (cs5535au == NULL) {
294 spin_lock_init(&cs5535au->reg_lock);
295 cs5535au->card = card;
299 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
304 cs5535au->port = pci_resource_start(pci, 0);
306 if (request_irq(pci->irq, snd_cs5535audio_interrupt,
307 SA_INTERRUPT|SA_SHIRQ, "CS5535 Audio", cs5535au)) {
308 snd_printk("unable to grab IRQ %d\n", pci->irq);
313 cs5535au->irq = pci->irq;
316 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
317 cs5535au, &ops)) < 0)
320 snd_card_set_dev(card, &pci->dev);
322 *rcs5535au = cs5535au;
325 sndfail: /* leave the device alive, just kill the snd */
326 snd_cs5535audio_free(cs5535au);
330 pci_disable_device(pci);
334 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci,
335 const struct pci_device_id *pci_id)
339 cs5535audio_t *cs5535au;
342 if (dev >= SNDRV_CARDS)
349 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
353 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
356 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
359 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
362 strcpy(card->driver, DRIVER_NAME);
364 strcpy(card->shortname, "CS5535 Audio");
365 sprintf(card->longname, "%s %s at 0x%lx, irq %i",
366 card->shortname, card->driver,
367 cs5535au->port, cs5535au->irq);
369 if ((err = snd_card_register(card)) < 0)
372 pci_set_drvdata(pci, card);
381 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci)
383 snd_card_free(pci_get_drvdata(pci));
384 pci_set_drvdata(pci, NULL);
387 static struct pci_driver driver = {
389 .id_table = snd_cs5535audio_ids,
390 .probe = snd_cs5535audio_probe,
391 .remove = __devexit_p(snd_cs5535audio_remove),
394 static int __init alsa_card_cs5535audio_init(void)
396 return pci_module_init(&driver);
399 static void __exit alsa_card_cs5535audio_exit(void)
401 pci_unregister_driver(&driver);
404 module_init(alsa_card_cs5535audio_init)
405 module_exit(alsa_card_cs5535audio_exit)
407 MODULE_AUTHOR("Jaya Kumar");
408 MODULE_LICENSE("GPL");
409 MODULE_DESCRIPTION("CS5535 Audio");
410 MODULE_SUPPORTED_DEVICE("CS5535 Audio");