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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/module.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
42static char *ac97_quirk;
43module_param(ac97_quirk, charp, 0444);
44MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
45
46static struct ac97_quirk ac97_quirks[] = {
47#if 0
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
58static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
59static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
60static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
61
62module_param_array(index, int, NULL, 0444);
63MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
64module_param_array(id, charp, NULL, 0444);
65MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
66module_param_array(enable, bool, NULL, 0444);
67MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
68
69static DEFINE_PCI_DEVICE_TABLE(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
75MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
76
77static 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
90static 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
118static 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
133static 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
140static 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
147static int 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_SCAP_POWER_SAVE;
164 ac97.private_data = cs5535au;
165 ac97.pci = cs5535au->pci;
166
167
168 olpc_prequirks(card, &ac97);
169
170 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
171 snd_printk(KERN_ERR "mixer failed\n");
172 return err;
173 }
174
175 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
176
177 err = olpc_quirks(card, cs5535au->ac97);
178 if (err < 0) {
179 snd_printk(KERN_ERR "olpc quirks failed\n");
180 return err;
181 }
182
183 return 0;
184}
185
186static void process_bm0_irq(struct cs5535audio *cs5535au)
187{
188 u8 bm_stat;
189 spin_lock(&cs5535au->reg_lock);
190 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
191 spin_unlock(&cs5535au->reg_lock);
192 if (bm_stat & EOP) {
193 struct cs5535audio_dma *dma;
194 dma = cs5535au->playback_substream->runtime->private_data;
195 snd_pcm_period_elapsed(cs5535au->playback_substream);
196 } else {
197 snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
198 bm_stat);
199 }
200}
201
202static void process_bm1_irq(struct cs5535audio *cs5535au)
203{
204 u8 bm_stat;
205 spin_lock(&cs5535au->reg_lock);
206 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
207 spin_unlock(&cs5535au->reg_lock);
208 if (bm_stat & EOP) {
209 struct cs5535audio_dma *dma;
210 dma = cs5535au->capture_substream->runtime->private_data;
211 snd_pcm_period_elapsed(cs5535au->capture_substream);
212 }
213}
214
215static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
216{
217 u16 acc_irq_stat;
218 unsigned char count;
219 struct cs5535audio *cs5535au = dev_id;
220
221 if (cs5535au == NULL)
222 return IRQ_NONE;
223
224 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
225
226 if (!acc_irq_stat)
227 return IRQ_NONE;
228 for (count = 0; count < 4; count++) {
229 if (acc_irq_stat & (1 << count)) {
230 switch (count) {
231 case IRQ_STS:
232 cs_readl(cs5535au, ACC_GPIO_STATUS);
233 break;
234 case WU_IRQ_STS:
235 cs_readl(cs5535au, ACC_GPIO_STATUS);
236 break;
237 case BM0_IRQ_STS:
238 process_bm0_irq(cs5535au);
239 break;
240 case BM1_IRQ_STS:
241 process_bm1_irq(cs5535au);
242 break;
243 default:
244 snd_printk(KERN_ERR "Unexpected irq src: "
245 "0x%x\n", acc_irq_stat);
246 break;
247 }
248 }
249 }
250 return IRQ_HANDLED;
251}
252
253static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
254{
255 synchronize_irq(cs5535au->irq);
256 pci_set_power_state(cs5535au->pci, 3);
257
258 if (cs5535au->irq >= 0)
259 free_irq(cs5535au->irq, cs5535au);
260
261 pci_release_regions(cs5535au->pci);
262 pci_disable_device(cs5535au->pci);
263 kfree(cs5535au);
264 return 0;
265}
266
267static int snd_cs5535audio_dev_free(struct snd_device *device)
268{
269 struct cs5535audio *cs5535au = device->device_data;
270 return snd_cs5535audio_free(cs5535au);
271}
272
273static int snd_cs5535audio_create(struct snd_card *card,
274 struct pci_dev *pci,
275 struct cs5535audio **rcs5535au)
276{
277 struct cs5535audio *cs5535au;
278
279 int err;
280 static struct snd_device_ops ops = {
281 .dev_free = snd_cs5535audio_dev_free,
282 };
283
284 *rcs5535au = NULL;
285 if ((err = pci_enable_device(pci)) < 0)
286 return err;
287
288 if (pci_set_dma_mask(pci, DMA_BIT_MASK(32)) < 0 ||
289 pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) < 0) {
290 printk(KERN_WARNING "unable to get 32bit dma\n");
291 err = -ENXIO;
292 goto pcifail;
293 }
294
295 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
296 if (cs5535au == NULL) {
297 err = -ENOMEM;
298 goto pcifail;
299 }
300
301 spin_lock_init(&cs5535au->reg_lock);
302 cs5535au->card = card;
303 cs5535au->pci = pci;
304 cs5535au->irq = -1;
305
306 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
307 kfree(cs5535au);
308 goto pcifail;
309 }
310
311 cs5535au->port = pci_resource_start(pci, 0);
312
313 if (request_irq(pci->irq, snd_cs5535audio_interrupt,
314 IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
315 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
316 err = -EBUSY;
317 goto sndfail;
318 }
319
320 cs5535au->irq = pci->irq;
321 pci_set_master(pci);
322
323 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
324 cs5535au, &ops)) < 0)
325 goto sndfail;
326
327 snd_card_set_dev(card, &pci->dev);
328
329 *rcs5535au = cs5535au;
330 return 0;
331
332sndfail:
333 snd_cs5535audio_free(cs5535au);
334 return err;
335
336pcifail:
337 pci_disable_device(pci);
338 return err;
339}
340
341static int snd_cs5535audio_probe(struct pci_dev *pci,
342 const struct pci_device_id *pci_id)
343{
344 static int dev;
345 struct snd_card *card;
346 struct cs5535audio *cs5535au;
347 int err;
348
349 if (dev >= SNDRV_CARDS)
350 return -ENODEV;
351 if (!enable[dev]) {
352 dev++;
353 return -ENOENT;
354 }
355
356 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
357 if (err < 0)
358 return err;
359
360 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
361 goto probefail_out;
362
363 card->private_data = cs5535au;
364
365 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
366 goto probefail_out;
367
368 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
369 goto probefail_out;
370
371 strcpy(card->driver, DRIVER_NAME);
372
373 strcpy(card->shortname, "CS5535 Audio");
374 sprintf(card->longname, "%s %s at 0x%lx, irq %i",
375 card->shortname, card->driver,
376 cs5535au->port, cs5535au->irq);
377
378 if ((err = snd_card_register(card)) < 0)
379 goto probefail_out;
380
381 pci_set_drvdata(pci, card);
382 dev++;
383 return 0;
384
385probefail_out:
386 snd_card_free(card);
387 return err;
388}
389
390static void snd_cs5535audio_remove(struct pci_dev *pci)
391{
392 olpc_quirks_cleanup();
393 snd_card_free(pci_get_drvdata(pci));
394 pci_set_drvdata(pci, NULL);
395}
396
397static struct pci_driver cs5535audio_driver = {
398 .name = KBUILD_MODNAME,
399 .id_table = snd_cs5535audio_ids,
400 .probe = snd_cs5535audio_probe,
401 .remove = snd_cs5535audio_remove,
402#ifdef CONFIG_PM_SLEEP
403 .driver = {
404 .pm = &snd_cs5535audio_pm,
405 },
406#endif
407};
408
409module_pci_driver(cs5535audio_driver);
410
411MODULE_AUTHOR("Jaya Kumar");
412MODULE_LICENSE("GPL");
413MODULE_DESCRIPTION("CS5535 Audio");
414MODULE_SUPPORTED_DEVICE("CS5535 Audio");
415
