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10#include <linux/delay.h>
11#include <linux/interrupt.h>
12#include <linux/init.h>
13#include <linux/pci.h>
14#include <linux/slab.h>
15#include <linux/module.h>
16#include <linux/io.h>
17#include <sound/core.h>
18#include <sound/control.h>
19#include <sound/pcm.h>
20#include <sound/rawmidi.h>
21#include <sound/ac97_codec.h>
22#include <sound/initval.h>
23#include <sound/asoundef.h>
24#include "cs5535audio.h"
25
26#define DRIVER_NAME "cs5535audio"
27
28static char *ac97_quirk;
29module_param(ac97_quirk, charp, 0444);
30MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
31
32static const struct ac97_quirk ac97_quirks[] = {
33#if 0
34 {
35 .subvendor = PCI_VENDOR_ID_AMD,
36 .subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO,
37 .name = "AMD RDK",
38 .type = AC97_TUNE_HP_ONLY
39 },
40#endif
41 {}
42};
43
44static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
45static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
46static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
47
48module_param_array(index, int, NULL, 0444);
49MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
50module_param_array(id, charp, NULL, 0444);
51MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
52module_param_array(enable, bool, NULL, 0444);
53MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
54
55static const struct pci_device_id snd_cs5535audio_ids[] = {
56 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
57 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
58 {}
59};
60
61MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
62
63static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
64{
65 unsigned int tmp;
66 do {
67 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
68 if (!(tmp & CMD_NEW))
69 break;
70 udelay(1);
71 } while (--timeout);
72 if (!timeout)
73 dev_err(cs5535au->card->dev,
74 "Failure writing to cs5535 codec\n");
75}
76
77static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
78 unsigned short reg)
79{
80 unsigned int regdata;
81 unsigned int timeout;
82 unsigned int val;
83
84 regdata = ((unsigned int) reg) << 24;
85 regdata |= ACC_CODEC_CNTL_RD_CMD;
86 regdata |= CMD_NEW;
87
88 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
89 wait_till_cmd_acked(cs5535au, 50);
90
91 timeout = 50;
92 do {
93 val = cs_readl(cs5535au, ACC_CODEC_STATUS);
94 if ((val & STS_NEW) && reg == (val >> 24))
95 break;
96 udelay(1);
97 } while (--timeout);
98 if (!timeout)
99 dev_err(cs5535au->card->dev,
100 "Failure reading codec reg 0x%x, Last value=0x%x\n",
101 reg, val);
102
103 return (unsigned short) val;
104}
105
106static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
107 unsigned short reg, unsigned short val)
108{
109 unsigned int regdata;
110
111 regdata = ((unsigned int) reg) << 24;
112 regdata |= val;
113 regdata &= CMD_MASK;
114 regdata |= CMD_NEW;
115 regdata &= ACC_CODEC_CNTL_WR_CMD;
116
117 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
118 wait_till_cmd_acked(cs5535au, 50);
119}
120
121static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
122 unsigned short reg, unsigned short val)
123{
124 struct cs5535audio *cs5535au = ac97->private_data;
125 snd_cs5535audio_codec_write(cs5535au, reg, val);
126}
127
128static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
129 unsigned short reg)
130{
131 struct cs5535audio *cs5535au = ac97->private_data;
132 return snd_cs5535audio_codec_read(cs5535au, reg);
133}
134
135static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
136{
137 struct snd_card *card = cs5535au->card;
138 struct snd_ac97_bus *pbus;
139 struct snd_ac97_template ac97;
140 int err;
141 static const struct snd_ac97_bus_ops ops = {
142 .write = snd_cs5535audio_ac97_codec_write,
143 .read = snd_cs5535audio_ac97_codec_read,
144 };
145
146 if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
147 return err;
148
149 memset(&ac97, 0, sizeof(ac97));
150 ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
151 | AC97_SCAP_POWER_SAVE;
152 ac97.private_data = cs5535au;
153 ac97.pci = cs5535au->pci;
154
155
156 olpc_prequirks(card, &ac97);
157
158 if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
159 dev_err(card->dev, "mixer failed\n");
160 return err;
161 }
162
163 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
164
165 err = olpc_quirks(card, cs5535au->ac97);
166 if (err < 0) {
167 dev_err(card->dev, "olpc quirks failed\n");
168 return err;
169 }
170
171 return 0;
172}
173
174static void process_bm0_irq(struct cs5535audio *cs5535au)
175{
176 u8 bm_stat;
177 spin_lock(&cs5535au->reg_lock);
178 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
179 spin_unlock(&cs5535au->reg_lock);
180 if (bm_stat & EOP) {
181 snd_pcm_period_elapsed(cs5535au->playback_substream);
182 } else {
183 dev_err(cs5535au->card->dev,
184 "unexpected bm0 irq src, bm_stat=%x\n",
185 bm_stat);
186 }
187}
188
189static void process_bm1_irq(struct cs5535audio *cs5535au)
190{
191 u8 bm_stat;
192 spin_lock(&cs5535au->reg_lock);
193 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
194 spin_unlock(&cs5535au->reg_lock);
195 if (bm_stat & EOP)
196 snd_pcm_period_elapsed(cs5535au->capture_substream);
197}
198
199static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
200{
201 u16 acc_irq_stat;
202 unsigned char count;
203 struct cs5535audio *cs5535au = dev_id;
204
205 if (cs5535au == NULL)
206 return IRQ_NONE;
207
208 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
209
210 if (!acc_irq_stat)
211 return IRQ_NONE;
212 for (count = 0; count < 4; count++) {
213 if (acc_irq_stat & (1 << count)) {
214 switch (count) {
215 case IRQ_STS:
216 cs_readl(cs5535au, ACC_GPIO_STATUS);
217 break;
218 case WU_IRQ_STS:
219 cs_readl(cs5535au, ACC_GPIO_STATUS);
220 break;
221 case BM0_IRQ_STS:
222 process_bm0_irq(cs5535au);
223 break;
224 case BM1_IRQ_STS:
225 process_bm1_irq(cs5535au);
226 break;
227 default:
228 dev_err(cs5535au->card->dev,
229 "Unexpected irq src: 0x%x\n",
230 acc_irq_stat);
231 break;
232 }
233 }
234 }
235 return IRQ_HANDLED;
236}
237
238static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
239{
240 pci_set_power_state(cs5535au->pci, PCI_D3hot);
241
242 if (cs5535au->irq >= 0)
243 free_irq(cs5535au->irq, cs5535au);
244
245 pci_release_regions(cs5535au->pci);
246 pci_disable_device(cs5535au->pci);
247 kfree(cs5535au);
248 return 0;
249}
250
251static int snd_cs5535audio_dev_free(struct snd_device *device)
252{
253 struct cs5535audio *cs5535au = device->device_data;
254 return snd_cs5535audio_free(cs5535au);
255}
256
257static int snd_cs5535audio_create(struct snd_card *card,
258 struct pci_dev *pci,
259 struct cs5535audio **rcs5535au)
260{
261 struct cs5535audio *cs5535au;
262
263 int err;
264 static const struct snd_device_ops ops = {
265 .dev_free = snd_cs5535audio_dev_free,
266 };
267
268 *rcs5535au = NULL;
269 if ((err = pci_enable_device(pci)) < 0)
270 return err;
271
272 if (dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0 ||
273 dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) {
274 dev_warn(card->dev, "unable to get 32bit dma\n");
275 err = -ENXIO;
276 goto pcifail;
277 }
278
279 cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
280 if (cs5535au == NULL) {
281 err = -ENOMEM;
282 goto pcifail;
283 }
284
285 spin_lock_init(&cs5535au->reg_lock);
286 cs5535au->card = card;
287 cs5535au->pci = pci;
288 cs5535au->irq = -1;
289
290 if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
291 kfree(cs5535au);
292 goto pcifail;
293 }
294
295 cs5535au->port = pci_resource_start(pci, 0);
296
297 if (request_irq(pci->irq, snd_cs5535audio_interrupt,
298 IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
299 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
300 err = -EBUSY;
301 goto sndfail;
302 }
303
304 cs5535au->irq = pci->irq;
305 card->sync_irq = cs5535au->irq;
306 pci_set_master(pci);
307
308 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
309 cs5535au, &ops)) < 0)
310 goto sndfail;
311
312 *rcs5535au = cs5535au;
313 return 0;
314
315sndfail:
316 snd_cs5535audio_free(cs5535au);
317 return err;
318
319pcifail:
320 pci_disable_device(pci);
321 return err;
322}
323
324static int snd_cs5535audio_probe(struct pci_dev *pci,
325 const struct pci_device_id *pci_id)
326{
327 static int dev;
328 struct snd_card *card;
329 struct cs5535audio *cs5535au;
330 int err;
331
332 if (dev >= SNDRV_CARDS)
333 return -ENODEV;
334 if (!enable[dev]) {
335 dev++;
336 return -ENOENT;
337 }
338
339 err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
340 0, &card);
341 if (err < 0)
342 return err;
343
344 if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
345 goto probefail_out;
346
347 card->private_data = cs5535au;
348
349 if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
350 goto probefail_out;
351
352 if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
353 goto probefail_out;
354
355 strcpy(card->driver, DRIVER_NAME);
356
357 strcpy(card->shortname, "CS5535 Audio");
358 sprintf(card->longname, "%s %s at 0x%lx, irq %i",
359 card->shortname, card->driver,
360 cs5535au->port, cs5535au->irq);
361
362 if ((err = snd_card_register(card)) < 0)
363 goto probefail_out;
364
365 pci_set_drvdata(pci, card);
366 dev++;
367 return 0;
368
369probefail_out:
370 snd_card_free(card);
371 return err;
372}
373
374static void snd_cs5535audio_remove(struct pci_dev *pci)
375{
376 olpc_quirks_cleanup();
377 snd_card_free(pci_get_drvdata(pci));
378}
379
380static struct pci_driver cs5535audio_driver = {
381 .name = KBUILD_MODNAME,
382 .id_table = snd_cs5535audio_ids,
383 .probe = snd_cs5535audio_probe,
384 .remove = snd_cs5535audio_remove,
385#ifdef CONFIG_PM_SLEEP
386 .driver = {
387 .pm = &snd_cs5535audio_pm,
388 },
389#endif
390};
391
392module_pci_driver(cs5535audio_driver);
393
394MODULE_AUTHOR("Jaya Kumar");
395MODULE_LICENSE("GPL");
396MODULE_DESCRIPTION("CS5535 Audio");
397MODULE_SUPPORTED_DEVICE("CS5535 Audio");
398
