[ALSA] cs5535audio: drop unused bus master stuff
[linux-2.6.git] / sound / pci / cs5535audio / cs5535audio.c
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 <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 static char *ac97_quirk;
44 module_param(ac97_quirk, charp, 0444);
45 MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
46
47 static struct ac97_quirk ac97_quirks[] __devinitdata = {
48 #if 0 /* Not yet confirmed if all 5536 boards are HP only */
49         {
50                 .subvendor = PCI_VENDOR_ID_AMD, 
51                 .subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO, 
52                 .name = "AMD RDK",     
53                 .type = AC97_TUNE_HP_ONLY
54         },
55 #endif
56         {}
57 };
58
59 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
60 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
61 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
62
63 module_param_array(index, int, NULL, 0444);
64 MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
65 module_param_array(id, charp, NULL, 0444);
66 MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
67 module_param_array(enable, bool, NULL, 0444);
68 MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
69
70 static struct pci_device_id snd_cs5535audio_ids[] = {
71         { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
72         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
73         {}
74 };
75
76 MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
77
78 static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
79 {
80         unsigned int tmp;
81         do {
82                 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
83                 if (!(tmp & CMD_NEW))
84                         break;
85                 udelay(1);
86         } while (--timeout);
87         if (!timeout)
88                 snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
89 }
90
91 static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
92                                                  unsigned short reg)
93 {
94         unsigned int regdata;
95         unsigned int timeout;
96         unsigned int val;
97
98         regdata = ((unsigned int) reg) << 24;
99         regdata |= ACC_CODEC_CNTL_RD_CMD;
100         regdata |= CMD_NEW;
101
102         cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
103         wait_till_cmd_acked(cs5535au, 50);
104
105         timeout = 50;
106         do {
107                 val = cs_readl(cs5535au, ACC_CODEC_STATUS);
108                 if ((val & STS_NEW) && reg == (val >> 24))
109                         break;
110                 udelay(1);
111         } while (--timeout);
112         if (!timeout)
113                 snd_printk(KERN_ERR "Failure reading codec reg 0x%x,"
114                                         "Last value=0x%x\n", reg, val);
115
116         return (unsigned short) val;
117 }
118
119 static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
120                                         unsigned short reg, unsigned short val)
121 {
122         unsigned int regdata;
123
124         regdata = ((unsigned int) reg) << 24;
125         regdata |= val;
126         regdata &= CMD_MASK;
127         regdata |= CMD_NEW;
128         regdata &= ACC_CODEC_CNTL_WR_CMD;
129
130         cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
131         wait_till_cmd_acked(cs5535au, 50);
132 }
133
134 static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
135                                              unsigned short reg, unsigned short val)
136 {
137         struct cs5535audio *cs5535au = ac97->private_data;
138         snd_cs5535audio_codec_write(cs5535au, reg, val);
139 }
140
141 static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
142                                                       unsigned short reg)
143 {
144         struct cs5535audio *cs5535au = ac97->private_data;
145         return snd_cs5535audio_codec_read(cs5535au, reg);
146 }
147
148 static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
149 {
150         struct snd_card *card = cs5535au->card;
151         struct snd_ac97_bus *pbus;
152         struct snd_ac97_template ac97;
153         int err;
154         static struct snd_ac97_bus_ops ops = {
155                 .write = snd_cs5535audio_ac97_codec_write,
156                 .read = snd_cs5535audio_ac97_codec_read,
157         };
158
159         if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
160                 return err;
161
162         memset(&ac97, 0, sizeof(ac97));
163         ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM;
164         ac97.private_data = cs5535au;
165         ac97.pci = cs5535au->pci;
166
167         if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
168                 snd_printk(KERN_ERR "mixer failed\n");
169                 return err;
170         }
171
172         snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
173
174         return 0;
175 }
176
177 static void process_bm0_irq(struct cs5535audio *cs5535au)
178 {
179         u8 bm_stat;
180         spin_lock(&cs5535au->reg_lock);
181         bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
182         spin_unlock(&cs5535au->reg_lock);
183         if (bm_stat & EOP) {
184                 struct cs5535audio_dma *dma;
185                 dma = cs5535au->playback_substream->runtime->private_data;
186                 snd_pcm_period_elapsed(cs5535au->playback_substream);
187         } else {
188                 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
189                                         bm_stat);
190         }
191 }
192
193 static void process_bm1_irq(struct cs5535audio *cs5535au)
194 {
195         u8 bm_stat;
196         spin_lock(&cs5535au->reg_lock);
197         bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
198         spin_unlock(&cs5535au->reg_lock);
199         if (bm_stat & EOP) {
200                 struct cs5535audio_dma *dma;
201                 dma = cs5535au->capture_substream->runtime->private_data;
202                 snd_pcm_period_elapsed(cs5535au->capture_substream);
203         }
204 }
205
206 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
207 {
208         u16 acc_irq_stat;
209         unsigned char count;
210         struct cs5535audio *cs5535au = dev_id;
211
212         if (cs5535au == NULL)
213                 return IRQ_NONE;
214
215         acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
216
217         if (!acc_irq_stat)
218                 return IRQ_NONE;
219         for (count = 0; count < 4; count++) {
220                 if (acc_irq_stat & (1 << count)) {
221                         switch (count) {
222                         case IRQ_STS:
223                                 cs_readl(cs5535au, ACC_GPIO_STATUS);
224                                 break;
225                         case WU_IRQ_STS:
226                                 cs_readl(cs5535au, ACC_GPIO_STATUS);
227                                 break;
228                         case BM0_IRQ_STS:
229                                 process_bm0_irq(cs5535au);
230                                 break;
231                         case BM1_IRQ_STS:
232                                 process_bm1_irq(cs5535au);
233                                 break;
234                         default:
235                                 snd_printk(KERN_ERR "Unexpected irq src: "
236                                                 "0x%x\n", acc_irq_stat);
237                                 break;
238                         }
239                 }
240         }
241         return IRQ_HANDLED;
242 }
243
244 static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
245 {
246         synchronize_irq(cs5535au->irq);
247         pci_set_power_state(cs5535au->pci, 3);
248
249         if (cs5535au->irq >= 0)
250                 free_irq(cs5535au->irq, cs5535au);
251
252         pci_release_regions(cs5535au->pci);
253         pci_disable_device(cs5535au->pci);
254         kfree(cs5535au);
255         return 0;
256 }
257
258 static int snd_cs5535audio_dev_free(struct snd_device *device)
259 {
260         struct cs5535audio *cs5535au = device->device_data;
261         return snd_cs5535audio_free(cs5535au);
262 }
263
264 static int __devinit snd_cs5535audio_create(struct snd_card *card,
265                                             struct pci_dev *pci,
266                                             struct cs5535audio **rcs5535au)
267 {
268         struct cs5535audio *cs5535au;
269
270         int err;
271         static struct snd_device_ops ops = {
272                 .dev_free =     snd_cs5535audio_dev_free,
273         };
274
275         *rcs5535au = NULL;
276         if ((err = pci_enable_device(pci)) < 0)
277                 return err;
278
279         if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
280             pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
281                 printk(KERN_WARNING "unable to get 32bit dma\n");
282                 err = -ENXIO;
283                 goto pcifail;
284         }
285
286         cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
287         if (cs5535au == NULL) {
288                 err = -ENOMEM;
289                 goto pcifail;
290         }
291
292         spin_lock_init(&cs5535au->reg_lock);
293         cs5535au->card = card;
294         cs5535au->pci = pci;
295         cs5535au->irq = -1;
296
297         if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
298                 kfree(cs5535au);
299                 goto pcifail;
300         }
301
302         cs5535au->port = pci_resource_start(pci, 0);
303
304         if (request_irq(pci->irq, snd_cs5535audio_interrupt,
305                         IRQF_SHARED, "CS5535 Audio", cs5535au)) {
306                 snd_printk("unable to grab IRQ %d\n", pci->irq);
307                 err = -EBUSY;
308                 goto sndfail;
309         }
310
311         cs5535au->irq = pci->irq;
312         pci_set_master(pci);
313
314         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
315                                   cs5535au, &ops)) < 0)
316                 goto sndfail;
317
318         snd_card_set_dev(card, &pci->dev);
319
320         *rcs5535au = cs5535au;
321         return 0;
322
323 sndfail: /* leave the device alive, just kill the snd */
324         snd_cs5535audio_free(cs5535au);
325         return err;
326
327 pcifail:
328         pci_disable_device(pci);
329         return err;
330 }
331
332 static int __devinit snd_cs5535audio_probe(struct pci_dev *pci,
333                                            const struct pci_device_id *pci_id)
334 {
335         static int dev;
336         struct snd_card *card;
337         struct cs5535audio *cs5535au;
338         int err;
339
340         if (dev >= SNDRV_CARDS)
341                 return -ENODEV;
342         if (!enable[dev]) {
343                 dev++;
344                 return -ENOENT;
345         }
346
347         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
348         if (card == NULL)
349                 return -ENOMEM;
350
351         if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
352                 goto probefail_out;
353
354         card->private_data = cs5535au;
355
356         if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
357                 goto probefail_out;
358
359         if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
360                 goto probefail_out;
361
362         strcpy(card->driver, DRIVER_NAME);
363
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);
368
369         if ((err = snd_card_register(card)) < 0)
370                 goto probefail_out;
371
372         pci_set_drvdata(pci, card);
373         dev++;
374         return 0;
375
376 probefail_out:
377         snd_card_free(card);
378         return err;
379 }
380
381 static void __devexit snd_cs5535audio_remove(struct pci_dev *pci)
382 {
383         snd_card_free(pci_get_drvdata(pci));
384         pci_set_drvdata(pci, NULL);
385 }
386
387 static struct pci_driver driver = {
388         .name = DRIVER_NAME,
389         .id_table = snd_cs5535audio_ids,
390         .probe = snd_cs5535audio_probe,
391         .remove = __devexit_p(snd_cs5535audio_remove),
392 #ifdef CONFIG_PM
393         .suspend = snd_cs5535audio_suspend,
394         .resume = snd_cs5535audio_resume,
395 #endif
396 };
397
398 static int __init alsa_card_cs5535audio_init(void)
399 {
400         return pci_register_driver(&driver);
401 }
402
403 static void __exit alsa_card_cs5535audio_exit(void)
404 {
405         pci_unregister_driver(&driver);
406 }
407
408 module_init(alsa_card_cs5535audio_init)
409 module_exit(alsa_card_cs5535audio_exit)
410
411 MODULE_AUTHOR("Jaya Kumar");
412 MODULE_LICENSE("GPL");
413 MODULE_DESCRIPTION("CS5535 Audio");
414 MODULE_SUPPORTED_DEVICE("CS5535 Audio");