source: GPL/trunk/alsa-kernel/pci/cs5535audio/cs5535audio.c

Last change on this file was 717, checked in by David Azarewicz, 3 years ago

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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Driver for audio on multifunction CS5535/6 companion device
4 * Copyright (C) Jaya Kumar
5 *
6 * Based on Jaroslav Kysela and Takashi Iwai's examples.
7 * This work was sponsored by CIS(M) Sdn Bhd.
8 */
9
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#ifdef TARGET_OS2
28#define KBUILD_MODNAME DRIVER_NAME
29#include <linux/dma-mapping.h>
30#endif
31
32static char *ac97_quirk;
33module_param(ac97_quirk, charp, 0444);
34MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
35
36static const struct ac97_quirk ac97_quirks[] = {
37#if 0 /* Not yet confirmed if all 5536 boards are HP only */
38 {
39 .subvendor = PCI_VENDOR_ID_AMD,
40 .subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO,
41 .name = "AMD RDK",
42 .type = AC97_TUNE_HP_ONLY
43 },
44#endif
45 {0}
46};
47
48static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
49static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
50static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
51
52module_param_array(index, int, NULL, 0444);
53MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
54module_param_array(id, charp, NULL, 0444);
55MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
56module_param_array(enable, bool, NULL, 0444);
57MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
58
59static const struct pci_device_id snd_cs5535audio_ids[] = {
60 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
61 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
62 {0}
63};
64
65MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
66
67static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
68{
69 unsigned int tmp;
70 do {
71 tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
72 if (!(tmp & CMD_NEW))
73 break;
74 udelay(1);
75 } while (--timeout);
76 if (!timeout)
77 dev_err(cs5535au->card->dev,
78 "Failure writing to cs5535 codec\n");
79}
80
81static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
82 unsigned short reg)
83{
84 unsigned int regdata;
85 unsigned int timeout;
86 unsigned int val;
87
88 regdata = ((unsigned int) reg) << 24;
89 regdata |= ACC_CODEC_CNTL_RD_CMD;
90 regdata |= CMD_NEW;
91
92 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
93 wait_till_cmd_acked(cs5535au, 50);
94
95 timeout = 50;
96 do {
97 val = cs_readl(cs5535au, ACC_CODEC_STATUS);
98 if ((val & STS_NEW) && reg == (val >> 24))
99 break;
100 udelay(1);
101 } while (--timeout);
102 if (!timeout)
103 dev_err(cs5535au->card->dev,
104 "Failure reading codec reg 0x%x, Last value=0x%x\n",
105 reg, val);
106
107 return (unsigned short) val;
108}
109
110static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
111 unsigned short reg, unsigned short val)
112{
113 unsigned int regdata;
114
115 regdata = ((unsigned int) reg) << 24;
116 regdata |= val;
117 regdata &= CMD_MASK;
118 regdata |= CMD_NEW;
119 regdata &= ACC_CODEC_CNTL_WR_CMD;
120
121 cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
122 wait_till_cmd_acked(cs5535au, 50);
123}
124
125static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
126 unsigned short reg, unsigned short val)
127{
128 struct cs5535audio *cs5535au = ac97->private_data;
129 snd_cs5535audio_codec_write(cs5535au, reg, val);
130}
131
132static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
133 unsigned short reg)
134{
135 struct cs5535audio *cs5535au = ac97->private_data;
136 return snd_cs5535audio_codec_read(cs5535au, reg);
137}
138
139static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
140{
141 struct snd_card *card = cs5535au->card;
142 struct snd_ac97_bus *pbus;
143 struct snd_ac97_template ac97;
144 int err;
145 static const struct snd_ac97_bus_ops ops = {
146 .write = snd_cs5535audio_ac97_codec_write,
147 .read = snd_cs5535audio_ac97_codec_read,
148 };
149
150 err = snd_ac97_bus(card, 0, &ops, NULL, &pbus);
151 if (err < 0)
152 return err;
153
154 memset(&ac97, 0, sizeof(ac97));
155 ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
156 | AC97_SCAP_POWER_SAVE;
157 ac97.private_data = cs5535au;
158 ac97.pci = cs5535au->pci;
159
160 /* set any OLPC-specific scaps */
161 olpc_prequirks(card, &ac97);
162
163 err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97);
164 if (err < 0) {
165 dev_err(card->dev, "mixer failed\n");
166 return err;
167 }
168
169 snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
170
171 err = olpc_quirks(card, cs5535au->ac97);
172 if (err < 0) {
173 dev_err(card->dev, "olpc quirks failed\n");
174 return err;
175 }
176
177 return 0;
178}
179
180static void process_bm0_irq(struct cs5535audio *cs5535au)
181{
182 u8 bm_stat;
183 spin_lock(&cs5535au->reg_lock);
184 bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
185 spin_unlock(&cs5535au->reg_lock);
186 if (bm_stat & EOP) {
187 snd_pcm_period_elapsed(cs5535au->playback_substream);
188 } else {
189 dev_err(cs5535au->card->dev,
190 "unexpected bm0 irq src, bm_stat=%x\n",
191 bm_stat);
192 }
193}
194
195static void process_bm1_irq(struct cs5535audio *cs5535au)
196{
197 u8 bm_stat;
198 spin_lock(&cs5535au->reg_lock);
199 bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
200 spin_unlock(&cs5535au->reg_lock);
201 if (bm_stat & EOP)
202 snd_pcm_period_elapsed(cs5535au->capture_substream);
203}
204
205static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
206{
207 u16 acc_irq_stat;
208 unsigned char count;
209 struct cs5535audio *cs5535au = dev_id;
210
211 if (cs5535au == NULL)
212 return IRQ_NONE;
213
214 acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
215
216 if (!acc_irq_stat)
217 return IRQ_NONE;
218 for (count = 0; count < 4; count++) {
219 if (acc_irq_stat & (1 << count)) {
220 switch (count) {
221 case IRQ_STS:
222 cs_readl(cs5535au, ACC_GPIO_STATUS);
223 break;
224 case WU_IRQ_STS:
225 cs_readl(cs5535au, ACC_GPIO_STATUS);
226 break;
227 case BM0_IRQ_STS:
228 process_bm0_irq(cs5535au);
229 break;
230 case BM1_IRQ_STS:
231 process_bm1_irq(cs5535au);
232 break;
233 default:
234 dev_err(cs5535au->card->dev,
235 "Unexpected irq src: 0x%x\n",
236 acc_irq_stat);
237 break;
238 }
239 }
240 }
241 return IRQ_HANDLED;
242}
243
244static void snd_cs5535audio_free(struct snd_card *card)
245{
246 olpc_quirks_cleanup();
247}
248
249static int snd_cs5535audio_create(struct snd_card *card,
250 struct pci_dev *pci)
251{
252 struct cs5535audio *cs5535au = card->private_data;
253 int err;
254
255 err = pcim_enable_device(pci);
256 if (err < 0)
257 return err;
258
259 if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
260 dev_warn(card->dev, "unable to get 32bit dma\n");
261 return -ENXIO;
262 }
263
264 spin_lock_init(&cs5535au->reg_lock);
265 cs5535au->card = card;
266 cs5535au->pci = pci;
267 cs5535au->irq = -1;
268
269 err = pci_request_regions(pci, "CS5535 Audio");
270 if (err < 0)
271 return err;
272
273 cs5535au->port = pci_resource_start(pci, 0);
274
275 if (devm_request_irq(&pci->dev, pci->irq, snd_cs5535audio_interrupt,
276 IRQF_SHARED, KBUILD_MODNAME, cs5535au)) {
277 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
278 return -EBUSY;
279 }
280
281 cs5535au->irq = pci->irq;
282 card->sync_irq = cs5535au->irq;
283 pci_set_master(pci);
284
285 return 0;
286}
287
288static int __snd_cs5535audio_probe(struct pci_dev *pci,
289 const struct pci_device_id *pci_id)
290{
291 static int dev;
292 struct snd_card *card;
293 struct cs5535audio *cs5535au;
294 int err;
295
296 if (dev >= SNDRV_CARDS)
297 return -ENODEV;
298 if (!enable[dev]) {
299 dev++;
300 return -ENOENT;
301 }
302
303 err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
304 sizeof(*cs5535au), &card);
305 if (err < 0)
306 return err;
307 cs5535au = card->private_data;
308 card->private_free = snd_cs5535audio_free;
309
310 err = snd_cs5535audio_create(card, pci);
311 if (err < 0)
312 return err;
313
314 err = snd_cs5535audio_mixer(cs5535au);
315 if (err < 0)
316 return err;
317
318 err = snd_cs5535audio_pcm(cs5535au);
319 if (err < 0)
320 return err;
321
322 strcpy(card->driver, DRIVER_NAME);
323
324 strcpy(card->shortname, "CS5535 Audio");
325 sprintf(card->longname, "%s %s at 0x%lx, irq %i",
326 card->shortname, card->driver,
327 cs5535au->port, cs5535au->irq);
328
329 err = snd_card_register(card);
330 if (err < 0)
331 return err;
332
333 pci_set_drvdata(pci, card);
334 dev++;
335 return 0;
336}
337
338static int snd_cs5535audio_probe(struct pci_dev *pci,
339 const struct pci_device_id *pci_id)
340{
341 return snd_card_free_on_error(&pci->dev, __snd_cs5535audio_probe(pci, pci_id));
342}
343
344static struct pci_driver cs5535audio_driver = {
345 .name = KBUILD_MODNAME,
346 .id_table = snd_cs5535audio_ids,
347 .probe = snd_cs5535audio_probe,
348#ifdef CONFIG_PM_SLEEP
349 .driver = {
350 .pm = &snd_cs5535audio_pm,
351 },
352#endif
353};
354
355module_pci_driver(cs5535audio_driver);
356
357MODULE_AUTHOR("Jaya Kumar");
358MODULE_LICENSE("GPL");
359MODULE_DESCRIPTION("CS5535 Audio");
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