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7#include <linux/clk.h>
8#include <linux/clocksource.h>
9#include <linux/completion.h>
10#include <linux/delay.h>
11#include <linux/dma-mapping.h>
12#include <linux/init.h>
13#include <linux/interrupt.h>
14#include <linux/io.h>
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <linux/mutex.h>
19#include <linux/of_device.h>
20#include <linux/slab.h>
21#include <linux/time.h>
22#include <linux/string.h>
23#include <linux/pm_runtime.h>
24
25#include <sound/core.h>
26#include <sound/initval.h>
27
28#include <sound/hda_codec.h>
29#include "hda_controller.h"
30
31
32#define HDA_BAR0 0x8000
33
34#define HDA_CFG_CMD 0x1004
35#define HDA_CFG_BAR0 0x1010
36
37#define HDA_ENABLE_IO_SPACE (1 << 0)
38#define HDA_ENABLE_MEM_SPACE (1 << 1)
39#define HDA_ENABLE_BUS_MASTER (1 << 2)
40#define HDA_ENABLE_SERR (1 << 8)
41#define HDA_DISABLE_INTR (1 << 10)
42#define HDA_BAR0_INIT_PROGRAM 0xFFFFFFFF
43#define HDA_BAR0_FINAL_PROGRAM (1 << 14)
44
45
46#define HDA_IPFS_CONFIG 0x180
47#define HDA_IPFS_EN_FPCI 0x1
48
49#define HDA_IPFS_FPCI_BAR0 0x80
50#define HDA_FPCI_BAR0_START 0x40
51
52#define HDA_IPFS_INTR_MASK 0x188
53#define HDA_IPFS_EN_INTR (1 << 16)
54
55
56#define NUM_CAPTURE_SD 1
57#define NUM_PLAYBACK_SD 1
58
59struct hda_tegra {
60 struct azx chip;
61 struct device *dev;
62 struct clk *hda_clk;
63 struct clk *hda2codec_2x_clk;
64 struct clk *hda2hdmi_clk;
65 void __iomem *regs;
66 struct work_struct probe_work;
67};
68
69#ifdef CONFIG_PM
70static int power_save = CONFIG_SND_HDA_POWER_SAVE_DEFAULT;
71module_param(power_save, bint, 0644);
72MODULE_PARM_DESC(power_save,
73 "Automatic power-saving timeout (in seconds, 0 = disable).");
74#else
75#define power_save 0
76#endif
77
78static const struct hda_controller_ops hda_tegra_ops;
79
80static void hda_tegra_init(struct hda_tegra *hda)
81{
82 u32 v;
83
84
85 v = readl(hda->regs + HDA_IPFS_CONFIG);
86 v |= HDA_IPFS_EN_FPCI;
87 writel(v, hda->regs + HDA_IPFS_CONFIG);
88
89
90 v = readl(hda->regs + HDA_CFG_CMD);
91 v &= ~HDA_DISABLE_INTR;
92 v |= HDA_ENABLE_MEM_SPACE | HDA_ENABLE_IO_SPACE |
93 HDA_ENABLE_BUS_MASTER | HDA_ENABLE_SERR;
94 writel(v, hda->regs + HDA_CFG_CMD);
95
96 writel(HDA_BAR0_INIT_PROGRAM, hda->regs + HDA_CFG_BAR0);
97 writel(HDA_BAR0_FINAL_PROGRAM, hda->regs + HDA_CFG_BAR0);
98 writel(HDA_FPCI_BAR0_START, hda->regs + HDA_IPFS_FPCI_BAR0);
99
100 v = readl(hda->regs + HDA_IPFS_INTR_MASK);
101 v |= HDA_IPFS_EN_INTR;
102 writel(v, hda->regs + HDA_IPFS_INTR_MASK);
103}
104
105static int hda_tegra_enable_clocks(struct hda_tegra *data)
106{
107 int rc;
108
109 rc = clk_prepare_enable(data->hda_clk);
110 if (rc)
111 return rc;
112 rc = clk_prepare_enable(data->hda2codec_2x_clk);
113 if (rc)
114 goto disable_hda;
115 rc = clk_prepare_enable(data->hda2hdmi_clk);
116 if (rc)
117 goto disable_codec_2x;
118
119 return 0;
120
121disable_codec_2x:
122 clk_disable_unprepare(data->hda2codec_2x_clk);
123disable_hda:
124 clk_disable_unprepare(data->hda_clk);
125 return rc;
126}
127
128static void hda_tegra_disable_clocks(struct hda_tegra *data)
129{
130 clk_disable_unprepare(data->hda2hdmi_clk);
131 clk_disable_unprepare(data->hda2codec_2x_clk);
132 clk_disable_unprepare(data->hda_clk);
133}
134
135
136
137
138static int __maybe_unused hda_tegra_suspend(struct device *dev)
139{
140 struct snd_card *card = dev_get_drvdata(dev);
141 int rc;
142
143 rc = pm_runtime_force_suspend(dev);
144 if (rc < 0)
145 return rc;
146 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
147
148 return 0;
149}
150
151static int __maybe_unused hda_tegra_resume(struct device *dev)
152{
153 struct snd_card *card = dev_get_drvdata(dev);
154 int rc;
155
156 rc = pm_runtime_force_resume(dev);
157 if (rc < 0)
158 return rc;
159 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
160
161 return 0;
162}
163
164static int __maybe_unused hda_tegra_runtime_suspend(struct device *dev)
165{
166 struct snd_card *card = dev_get_drvdata(dev);
167 struct azx *chip = card->private_data;
168 struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
169 struct hdac_bus *bus = azx_bus(chip);
170
171 if (chip && chip->running) {
172 azx_stop_chip(chip);
173 synchronize_irq(bus->irq);
174 azx_enter_link_reset(chip);
175 }
176 hda_tegra_disable_clocks(hda);
177
178 return 0;
179}
180
181static int __maybe_unused hda_tegra_runtime_resume(struct device *dev)
182{
183 struct snd_card *card = dev_get_drvdata(dev);
184 struct azx *chip = card->private_data;
185 struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
186 int rc;
187
188 rc = hda_tegra_enable_clocks(hda);
189 if (rc != 0)
190 return rc;
191 if (chip && chip->running) {
192 hda_tegra_init(hda);
193 azx_init_chip(chip, 1);
194 }
195
196 return 0;
197}
198
199static const struct dev_pm_ops hda_tegra_pm = {
200 SET_SYSTEM_SLEEP_PM_OPS(hda_tegra_suspend, hda_tegra_resume)
201 SET_RUNTIME_PM_OPS(hda_tegra_runtime_suspend,
202 hda_tegra_runtime_resume,
203 NULL)
204};
205
206static int hda_tegra_dev_disconnect(struct snd_device *device)
207{
208 struct azx *chip = device->device_data;
209
210 chip->bus.shutdown = 1;
211 return 0;
212}
213
214
215
216
217static int hda_tegra_dev_free(struct snd_device *device)
218{
219 struct azx *chip = device->device_data;
220 struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
221
222 cancel_work_sync(&hda->probe_work);
223 if (azx_bus(chip)->chip_init) {
224 azx_stop_all_streams(chip);
225 azx_stop_chip(chip);
226 }
227
228 azx_free_stream_pages(chip);
229 azx_free_streams(chip);
230 snd_hdac_bus_exit(azx_bus(chip));
231
232 return 0;
233}
234
235static int hda_tegra_init_chip(struct azx *chip, struct platform_device *pdev)
236{
237 struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
238 struct hdac_bus *bus = azx_bus(chip);
239 struct device *dev = hda->dev;
240 struct resource *res;
241
242 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
243 hda->regs = devm_ioremap_resource(dev, res);
244 if (IS_ERR(hda->regs))
245 return PTR_ERR(hda->regs);
246
247 bus->remap_addr = hda->regs + HDA_BAR0;
248 bus->addr = res->start + HDA_BAR0;
249
250 hda_tegra_init(hda);
251
252 return 0;
253}
254
255static int hda_tegra_init_clk(struct hda_tegra *hda)
256{
257 struct device *dev = hda->dev;
258
259 hda->hda_clk = devm_clk_get(dev, "hda");
260 if (IS_ERR(hda->hda_clk)) {
261 dev_err(dev, "failed to get hda clock\n");
262 return PTR_ERR(hda->hda_clk);
263 }
264 hda->hda2codec_2x_clk = devm_clk_get(dev, "hda2codec_2x");
265 if (IS_ERR(hda->hda2codec_2x_clk)) {
266 dev_err(dev, "failed to get hda2codec_2x clock\n");
267 return PTR_ERR(hda->hda2codec_2x_clk);
268 }
269 hda->hda2hdmi_clk = devm_clk_get(dev, "hda2hdmi");
270 if (IS_ERR(hda->hda2hdmi_clk)) {
271 dev_err(dev, "failed to get hda2hdmi clock\n");
272 return PTR_ERR(hda->hda2hdmi_clk);
273 }
274
275 return 0;
276}
277
278static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev)
279{
280 struct hdac_bus *bus = azx_bus(chip);
281 struct snd_card *card = chip->card;
282 int err;
283 unsigned short gcap;
284 int irq_id = platform_get_irq(pdev, 0);
285 const char *sname, *drv_name = "tegra-hda";
286 struct device_node *np = pdev->dev.of_node;
287
288 err = hda_tegra_init_chip(chip, pdev);
289 if (err)
290 return err;
291
292 err = devm_request_irq(chip->card->dev, irq_id, azx_interrupt,
293 IRQF_SHARED, KBUILD_MODNAME, chip);
294 if (err) {
295 dev_err(chip->card->dev,
296 "unable to request IRQ %d, disabling device\n",
297 irq_id);
298 return err;
299 }
300 bus->irq = irq_id;
301
302 synchronize_irq(bus->irq);
303
304 gcap = azx_readw(chip, GCAP);
305 dev_dbg(card->dev, "chipset global capabilities = 0x%x\n", gcap);
306
307
308
309
310 chip->capture_streams = (gcap >> 8) & 0x0f;
311 chip->playback_streams = (gcap >> 12) & 0x0f;
312 if (!chip->playback_streams && !chip->capture_streams) {
313
314 chip->playback_streams = NUM_PLAYBACK_SD;
315 chip->capture_streams = NUM_CAPTURE_SD;
316 }
317 chip->capture_index_offset = 0;
318 chip->playback_index_offset = chip->capture_streams;
319 chip->num_streams = chip->playback_streams + chip->capture_streams;
320
321
322 err = azx_init_streams(chip);
323 if (err < 0) {
324 dev_err(card->dev, "failed to initialize streams: %d\n", err);
325 return err;
326 }
327
328 err = azx_alloc_stream_pages(chip);
329 if (err < 0) {
330 dev_err(card->dev, "failed to allocate stream pages: %d\n",
331 err);
332 return err;
333 }
334
335
336 azx_init_chip(chip, 1);
337
338
339 if (!bus->codec_mask) {
340 dev_err(card->dev, "no codecs found!\n");
341 return -ENODEV;
342 }
343
344
345 strncpy(card->driver, drv_name, sizeof(card->driver));
346
347 sname = of_get_property(np, "nvidia,model", NULL);
348 if (!sname)
349 sname = drv_name;
350 if (strlen(sname) > sizeof(card->shortname))
351 dev_info(card->dev, "truncating shortname for card\n");
352 strncpy(card->shortname, sname, sizeof(card->shortname));
353
354
355 snprintf(card->longname, sizeof(card->longname),
356 "%s at 0x%lx irq %i",
357 card->shortname, bus->addr, bus->irq);
358
359 return 0;
360}
361
362
363
364
365
366static void hda_tegra_probe_work(struct work_struct *work);
367
368static int hda_tegra_create(struct snd_card *card,
369 unsigned int driver_caps,
370 struct hda_tegra *hda)
371{
372 static struct snd_device_ops ops = {
373 .dev_disconnect = hda_tegra_dev_disconnect,
374 .dev_free = hda_tegra_dev_free,
375 };
376 struct azx *chip;
377 int err;
378
379 chip = &hda->chip;
380
381 mutex_init(&chip->open_mutex);
382 chip->card = card;
383 chip->ops = &hda_tegra_ops;
384 chip->driver_caps = driver_caps;
385 chip->driver_type = driver_caps & 0xff;
386 chip->dev_index = 0;
387 INIT_LIST_HEAD(&chip->pcm_list);
388
389 chip->codec_probe_mask = -1;
390
391 chip->single_cmd = false;
392 chip->snoop = true;
393
394 INIT_WORK(&hda->probe_work, hda_tegra_probe_work);
395
396 err = azx_bus_init(chip, NULL);
397 if (err < 0)
398 return err;
399
400 chip->bus.needs_damn_long_delay = 1;
401
402 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
403 if (err < 0) {
404 dev_err(card->dev, "Error creating device\n");
405 return err;
406 }
407
408 return 0;
409}
410
411static const struct of_device_id hda_tegra_match[] = {
412 { .compatible = "nvidia,tegra30-hda" },
413 {},
414};
415MODULE_DEVICE_TABLE(of, hda_tegra_match);
416
417static int hda_tegra_probe(struct platform_device *pdev)
418{
419 const unsigned int driver_flags = AZX_DCAPS_CORBRP_SELF_CLEAR |
420 AZX_DCAPS_PM_RUNTIME;
421 struct snd_card *card;
422 struct azx *chip;
423 struct hda_tegra *hda;
424 int err;
425
426 hda = devm_kzalloc(&pdev->dev, sizeof(*hda), GFP_KERNEL);
427 if (!hda)
428 return -ENOMEM;
429 hda->dev = &pdev->dev;
430 chip = &hda->chip;
431
432 err = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
433 THIS_MODULE, 0, &card);
434 if (err < 0) {
435 dev_err(&pdev->dev, "Error creating card!\n");
436 return err;
437 }
438
439 err = hda_tegra_init_clk(hda);
440 if (err < 0)
441 goto out_free;
442
443 err = hda_tegra_create(card, driver_flags, hda);
444 if (err < 0)
445 goto out_free;
446 card->private_data = chip;
447
448 dev_set_drvdata(&pdev->dev, card);
449
450 pm_runtime_enable(hda->dev);
451 if (!azx_has_pm_runtime(chip))
452 pm_runtime_forbid(hda->dev);
453
454 schedule_work(&hda->probe_work);
455
456 return 0;
457
458out_free:
459 snd_card_free(card);
460 return err;
461}
462
463static void hda_tegra_probe_work(struct work_struct *work)
464{
465 struct hda_tegra *hda = container_of(work, struct hda_tegra, probe_work);
466 struct azx *chip = &hda->chip;
467 struct platform_device *pdev = to_platform_device(hda->dev);
468 int err;
469
470 pm_runtime_get_sync(hda->dev);
471 err = hda_tegra_first_init(chip, pdev);
472 if (err < 0)
473 goto out_free;
474
475
476 err = azx_probe_codecs(chip, 8);
477 if (err < 0)
478 goto out_free;
479
480 err = azx_codec_configure(chip);
481 if (err < 0)
482 goto out_free;
483
484 err = snd_card_register(chip->card);
485 if (err < 0)
486 goto out_free;
487
488 chip->running = 1;
489 snd_hda_set_power_save(&chip->bus, power_save * 1000);
490
491 out_free:
492 pm_runtime_put(hda->dev);
493 return;
494}
495
496static int hda_tegra_remove(struct platform_device *pdev)
497{
498 int ret;
499
500 ret = snd_card_free(dev_get_drvdata(&pdev->dev));
501 pm_runtime_disable(&pdev->dev);
502
503 return ret;
504}
505
506static void hda_tegra_shutdown(struct platform_device *pdev)
507{
508 struct snd_card *card = dev_get_drvdata(&pdev->dev);
509 struct azx *chip;
510
511 if (!card)
512 return;
513 chip = card->private_data;
514 if (chip && chip->running)
515 azx_stop_chip(chip);
516}
517
518static struct platform_driver tegra_platform_hda = {
519 .driver = {
520 .name = "tegra-hda",
521 .pm = &hda_tegra_pm,
522 .of_match_table = hda_tegra_match,
523 },
524 .probe = hda_tegra_probe,
525 .remove = hda_tegra_remove,
526 .shutdown = hda_tegra_shutdown,
527};
528module_platform_driver(tegra_platform_hda);
529
530MODULE_DESCRIPTION("Tegra HDA bus driver");
531MODULE_LICENSE("GPL v2");
532
