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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 err = snd_ac97_bus(card, 0, &ops, NULL, &pbus);
147 if (err < 0)
148 return err;
149
150 memset(&ac97, 0, sizeof(ac97));
151 ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
152 | AC97_SCAP_POWER_SAVE;
153 ac97.private_data = cs5535au;
154 ac97.pci = cs5535au->pci;
155
156
157 olpc_prequirks(card, &ac97);
158
159 err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97);
160 if (err < 0) {
161 dev_err(card->dev, "mixer failed\n");
162 return err;
163 }
164
165 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
166
167 err = olpc_quirks(card, cs5535au->ac97);
168 if (err < 0) {
169 dev_err(card->dev, "olpc quirks failed\n");
170 return err;
171 }
172
173 return 0;
174}
175
176static void process_bm0_irq(struct cs5535audio *cs5535au)
177{
178 u8 bm_stat;
179 spin_lock(&cs5535au->reg_lock);
180 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
181 spin_unlock(&cs5535au->reg_lock);
182 if (bm_stat & EOP) {
183 snd_pcm_period_elapsed(cs5535au->playback_substream);
184 } else {
185 dev_err(cs5535au->card->dev,
186 "unexpected bm0 irq src, bm_stat=%x\n",
187 bm_stat);
188 }
189}
190
191static void process_bm1_irq(struct cs5535audio *cs5535au)
192{
193 u8 bm_stat;
194 spin_lock(&cs5535au->reg_lock);
195 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
196 spin_unlock(&cs5535au->reg_lock);
197 if (bm_stat & EOP)
198 snd_pcm_period_elapsed(cs5535au->capture_substream);
199}
200
201static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
202{
203 u16 acc_irq_stat;
204 unsigned char count;
205 struct cs5535audio *cs5535au = dev_id;
206
207 if (cs5535au == NULL)
208 return IRQ_NONE;
209
210 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
211
212 if (!acc_irq_stat)
213 return IRQ_NONE;
214 for (count = 0; count < 4; count++) {
215 if (acc_irq_stat & (1 << count)) {
216 switch (count) {
217 case IRQ_STS:
218 cs_readl(cs5535au, ACC_GPIO_STATUS);
219 break;
220 case WU_IRQ_STS:
221 cs_readl(cs5535au, ACC_GPIO_STATUS);
222 break;
223 case BM0_IRQ_STS:
224 process_bm0_irq(cs5535au);
225 break;
226 case BM1_IRQ_STS:
227 process_bm1_irq(cs5535au);
228 break;
229 default:
230 dev_err(cs5535au->card->dev,
231 "Unexpected irq src: 0x%x\n",
232 acc_irq_stat);
233 break;
234 }
235 }
236 }
237 return IRQ_HANDLED;
238}
239
240static void snd_cs5535audio_free(struct snd_card *card)
241{
242 olpc_quirks_cleanup();
243}
244
245static int snd_cs5535audio_create(struct snd_card *card,
246 struct pci_dev *pci)
247{
248 struct cs5535audio *cs5535au = card->private_data;
249 int err;
250
251 err = pcim_enable_device(pci);
252 if (err < 0)
253 return err;
254
255 if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
256 dev_warn(card->dev, "unable to get 32bit dma\n");
257 return -ENXIO;
258 }
259
260 spin_lock_init(&cs5535au->reg_lock);
261 cs5535au->card = card;
262 cs5535au->pci = pci;
263 cs5535au->irq = -1;
264
265 err = pci_request_regions(pci, "CS5535 Audio");
266 if (err < 0)
267 return err;
268
269 cs5535au->port = pci_resource_start(pci, 0);
270
271 if (devm_request_irq(&pci->dev, pci->irq, snd_cs5535audio_interrupt,
272 IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
273 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
274 return -EBUSY;
275 }
276
277 cs5535au->irq = pci->irq;
278 card->sync_irq = cs5535au->irq;
279 pci_set_master(pci);
280
281 return 0;
282}
283
284static int snd_cs5535audio_probe(struct pci_dev *pci,
285 const struct pci_device_id *pci_id)
286{
287 static int dev;
288 struct snd_card *card;
289 struct cs5535audio *cs5535au;
290 int err;
291
292 if (dev >= SNDRV_CARDS)
293 return -ENODEV;
294 if (!enable[dev]) {
295 dev++;
296 return -ENOENT;
297 }
298
299 err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
300 sizeof(*cs5535au), &card);
301 if (err < 0)
302 return err;
303 cs5535au = card->private_data;
304 card->private_free = snd_cs5535audio_free;
305
306 err = snd_cs5535audio_create(card, pci);
307 if (err < 0)
308 return err;
309
310 err = snd_cs5535audio_mixer(cs5535au);
311 if (err < 0)
312 return err;
313
314 err = snd_cs5535audio_pcm(cs5535au);
315 if (err < 0)
316 return err;
317
318 strcpy(card->driver, DRIVER_NAME);
319
320 strcpy(card->shortname, "CS5535 Audio");
321 sprintf(card->longname, "%s %s at 0x%lx, irq %i",
322 card->shortname, card->driver,
323 cs5535au->port, cs5535au->irq);
324
325 err = snd_card_register(card);
326 if (err < 0)
327 return err;
328
329 pci_set_drvdata(pci, card);
330 dev++;
331 return 0;
332}
333
334static struct pci_driver cs5535audio_driver = {
335 .name = KBUILD_MODNAME,
336 .id_table = snd_cs5535audio_ids,
337 .probe = snd_cs5535audio_probe,
338#ifdef CONFIG_PM_SLEEP
339 .driver = {
340 .pm = &snd_cs5535audio_pm,
341 },
342#endif
343};
344
345module_pci_driver(cs5535audio_driver);
346
347MODULE_AUTHOR("Jaya Kumar");
348MODULE_LICENSE("GPL");
349MODULE_DESCRIPTION("CS5535 Audio");
350
