Commit | Line | Data |
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3c320f3f DR |
1 | /* |
2 | * | |
3 | * Implementation of primary ALSA driver code base for NVIDIA Tegra HDA. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/clk.h> | |
20 | #include <linux/clocksource.h> | |
21 | #include <linux/completion.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/dma-mapping.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/io.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/moduleparam.h> | |
30 | #include <linux/mutex.h> | |
31 | #include <linux/of_device.h> | |
32 | #include <linux/reboot.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/time.h> | |
35 | ||
36 | #include <sound/core.h> | |
37 | #include <sound/initval.h> | |
38 | ||
39 | #include "hda_codec.h" | |
40 | #include "hda_controller.h" | |
41 | #include "hda_priv.h" | |
42 | ||
43 | /* Defines for Nvidia Tegra HDA support */ | |
44 | #define HDA_BAR0 0x8000 | |
45 | ||
46 | #define HDA_CFG_CMD 0x1004 | |
47 | #define HDA_CFG_BAR0 0x1010 | |
48 | ||
49 | #define HDA_ENABLE_IO_SPACE (1 << 0) | |
50 | #define HDA_ENABLE_MEM_SPACE (1 << 1) | |
51 | #define HDA_ENABLE_BUS_MASTER (1 << 2) | |
52 | #define HDA_ENABLE_SERR (1 << 8) | |
53 | #define HDA_DISABLE_INTR (1 << 10) | |
54 | #define HDA_BAR0_INIT_PROGRAM 0xFFFFFFFF | |
55 | #define HDA_BAR0_FINAL_PROGRAM (1 << 14) | |
56 | ||
57 | /* IPFS */ | |
58 | #define HDA_IPFS_CONFIG 0x180 | |
59 | #define HDA_IPFS_EN_FPCI 0x1 | |
60 | ||
61 | #define HDA_IPFS_FPCI_BAR0 0x80 | |
62 | #define HDA_FPCI_BAR0_START 0x40 | |
63 | ||
64 | #define HDA_IPFS_INTR_MASK 0x188 | |
65 | #define HDA_IPFS_EN_INTR (1 << 16) | |
66 | ||
67 | /* max number of SDs */ | |
68 | #define NUM_CAPTURE_SD 1 | |
69 | #define NUM_PLAYBACK_SD 1 | |
70 | ||
71 | struct hda_tegra { | |
72 | struct azx chip; | |
73 | struct device *dev; | |
74 | struct clk *hda_clk; | |
75 | struct clk *hda2codec_2x_clk; | |
76 | struct clk *hda2hdmi_clk; | |
77 | void __iomem *regs; | |
78 | }; | |
79 | ||
80 | static int power_save = CONFIG_SND_HDA_POWER_SAVE_DEFAULT; | |
81 | module_param(power_save, bint, 0644); | |
82 | MODULE_PARM_DESC(power_save, | |
83 | "Automatic power-saving timeout (in seconds, 0 = disable)."); | |
84 | ||
85 | /* | |
86 | * DMA page allocation ops. | |
87 | */ | |
88 | static int dma_alloc_pages(struct azx *chip, int type, size_t size, | |
89 | struct snd_dma_buffer *buf) | |
90 | { | |
91 | return snd_dma_alloc_pages(type, chip->card->dev, size, buf); | |
92 | } | |
93 | ||
94 | static void dma_free_pages(struct azx *chip, struct snd_dma_buffer *buf) | |
95 | { | |
96 | snd_dma_free_pages(buf); | |
97 | } | |
98 | ||
99 | static int substream_alloc_pages(struct azx *chip, | |
100 | struct snd_pcm_substream *substream, | |
101 | size_t size) | |
102 | { | |
103 | struct azx_dev *azx_dev = get_azx_dev(substream); | |
104 | ||
105 | azx_dev->bufsize = 0; | |
106 | azx_dev->period_bytes = 0; | |
107 | azx_dev->format_val = 0; | |
108 | return snd_pcm_lib_malloc_pages(substream, size); | |
109 | } | |
110 | ||
111 | static int substream_free_pages(struct azx *chip, | |
112 | struct snd_pcm_substream *substream) | |
113 | { | |
114 | return snd_pcm_lib_free_pages(substream); | |
115 | } | |
116 | ||
117 | /* | |
118 | * Register access ops. Tegra HDA register access is DWORD only. | |
119 | */ | |
120 | static void hda_tegra_writel(u32 value, u32 *addr) | |
121 | { | |
122 | writel(value, addr); | |
123 | } | |
124 | ||
125 | static u32 hda_tegra_readl(u32 *addr) | |
126 | { | |
127 | return readl(addr); | |
128 | } | |
129 | ||
130 | static void hda_tegra_writew(u16 value, u16 *addr) | |
131 | { | |
132 | unsigned int shift = ((unsigned long)(addr) & 0x3) << 3; | |
133 | void *dword_addr = (void *)((unsigned long)(addr) & ~0x3); | |
134 | u32 v; | |
135 | ||
136 | v = readl(dword_addr); | |
137 | v &= ~(0xffff << shift); | |
138 | v |= value << shift; | |
139 | writel(v, dword_addr); | |
140 | } | |
141 | ||
142 | static u16 hda_tegra_readw(u16 *addr) | |
143 | { | |
144 | unsigned int shift = ((unsigned long)(addr) & 0x3) << 3; | |
145 | void *dword_addr = (void *)((unsigned long)(addr) & ~0x3); | |
146 | u32 v; | |
147 | ||
148 | v = readl(dword_addr); | |
149 | return (v >> shift) & 0xffff; | |
150 | } | |
151 | ||
152 | static void hda_tegra_writeb(u8 value, u8 *addr) | |
153 | { | |
154 | unsigned int shift = ((unsigned long)(addr) & 0x3) << 3; | |
155 | void *dword_addr = (void *)((unsigned long)(addr) & ~0x3); | |
156 | u32 v; | |
157 | ||
158 | v = readl(dword_addr); | |
159 | v &= ~(0xff << shift); | |
160 | v |= value << shift; | |
161 | writel(v, dword_addr); | |
162 | } | |
163 | ||
164 | static u8 hda_tegra_readb(u8 *addr) | |
165 | { | |
166 | unsigned int shift = ((unsigned long)(addr) & 0x3) << 3; | |
167 | void *dword_addr = (void *)((unsigned long)(addr) & ~0x3); | |
168 | u32 v; | |
169 | ||
170 | v = readl(dword_addr); | |
171 | return (v >> shift) & 0xff; | |
172 | } | |
173 | ||
174 | static const struct hda_controller_ops hda_tegra_ops = { | |
175 | .reg_writel = hda_tegra_writel, | |
176 | .reg_readl = hda_tegra_readl, | |
177 | .reg_writew = hda_tegra_writew, | |
178 | .reg_readw = hda_tegra_readw, | |
179 | .reg_writeb = hda_tegra_writeb, | |
180 | .reg_readb = hda_tegra_readb, | |
181 | .dma_alloc_pages = dma_alloc_pages, | |
182 | .dma_free_pages = dma_free_pages, | |
183 | .substream_alloc_pages = substream_alloc_pages, | |
184 | .substream_free_pages = substream_free_pages, | |
185 | }; | |
186 | ||
187 | static void hda_tegra_init(struct hda_tegra *hda) | |
188 | { | |
189 | u32 v; | |
190 | ||
191 | /* Enable PCI access */ | |
192 | v = readl(hda->regs + HDA_IPFS_CONFIG); | |
193 | v |= HDA_IPFS_EN_FPCI; | |
194 | writel(v, hda->regs + HDA_IPFS_CONFIG); | |
195 | ||
196 | /* Enable MEM/IO space and bus master */ | |
197 | v = readl(hda->regs + HDA_CFG_CMD); | |
198 | v &= ~HDA_DISABLE_INTR; | |
199 | v |= HDA_ENABLE_MEM_SPACE | HDA_ENABLE_IO_SPACE | | |
200 | HDA_ENABLE_BUS_MASTER | HDA_ENABLE_SERR; | |
201 | writel(v, hda->regs + HDA_CFG_CMD); | |
202 | ||
203 | writel(HDA_BAR0_INIT_PROGRAM, hda->regs + HDA_CFG_BAR0); | |
204 | writel(HDA_BAR0_FINAL_PROGRAM, hda->regs + HDA_CFG_BAR0); | |
205 | writel(HDA_FPCI_BAR0_START, hda->regs + HDA_IPFS_FPCI_BAR0); | |
206 | ||
207 | v = readl(hda->regs + HDA_IPFS_INTR_MASK); | |
208 | v |= HDA_IPFS_EN_INTR; | |
209 | writel(v, hda->regs + HDA_IPFS_INTR_MASK); | |
210 | } | |
211 | ||
212 | static int hda_tegra_enable_clocks(struct hda_tegra *data) | |
213 | { | |
214 | int rc; | |
215 | ||
216 | rc = clk_prepare_enable(data->hda_clk); | |
217 | if (rc) | |
218 | return rc; | |
219 | rc = clk_prepare_enable(data->hda2codec_2x_clk); | |
220 | if (rc) | |
221 | goto disable_hda; | |
222 | rc = clk_prepare_enable(data->hda2hdmi_clk); | |
223 | if (rc) | |
224 | goto disable_codec_2x; | |
225 | ||
226 | return 0; | |
227 | ||
228 | disable_codec_2x: | |
229 | clk_disable_unprepare(data->hda2codec_2x_clk); | |
230 | disable_hda: | |
231 | clk_disable_unprepare(data->hda_clk); | |
232 | return rc; | |
233 | } | |
234 | ||
235 | static void hda_tegra_disable_clocks(struct hda_tegra *data) | |
236 | { | |
237 | clk_disable_unprepare(data->hda2hdmi_clk); | |
238 | clk_disable_unprepare(data->hda2codec_2x_clk); | |
239 | clk_disable_unprepare(data->hda_clk); | |
240 | } | |
241 | ||
242 | #ifdef CONFIG_PM_SLEEP | |
243 | /* | |
244 | * power management | |
245 | */ | |
246 | static int hda_tegra_suspend(struct device *dev) | |
247 | { | |
248 | struct snd_card *card = dev_get_drvdata(dev); | |
249 | struct azx *chip = card->private_data; | |
250 | struct azx_pcm *p; | |
251 | struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip); | |
252 | ||
253 | snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); | |
254 | list_for_each_entry(p, &chip->pcm_list, list) | |
255 | snd_pcm_suspend_all(p->pcm); | |
256 | if (chip->initialized) | |
257 | snd_hda_suspend(chip->bus); | |
258 | ||
259 | azx_stop_chip(chip); | |
260 | azx_enter_link_reset(chip); | |
261 | hda_tegra_disable_clocks(hda); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | static int hda_tegra_resume(struct device *dev) | |
267 | { | |
268 | struct snd_card *card = dev_get_drvdata(dev); | |
269 | struct azx *chip = card->private_data; | |
270 | struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip); | |
271 | int status; | |
272 | ||
273 | hda_tegra_enable_clocks(hda); | |
274 | ||
275 | /* Read STATESTS before controller reset */ | |
276 | status = azx_readw(chip, STATESTS); | |
277 | ||
278 | hda_tegra_init(hda); | |
279 | ||
280 | azx_init_chip(chip, 1); | |
281 | ||
282 | snd_hda_resume(chip->bus); | |
283 | snd_power_change_state(card, SNDRV_CTL_POWER_D0); | |
284 | ||
285 | return 0; | |
286 | } | |
287 | #endif /* CONFIG_PM_SLEEP */ | |
288 | ||
289 | static const struct dev_pm_ops hda_tegra_pm = { | |
290 | SET_SYSTEM_SLEEP_PM_OPS(hda_tegra_suspend, hda_tegra_resume) | |
291 | }; | |
292 | ||
293 | /* | |
294 | * reboot notifier for hang-up problem at power-down | |
295 | */ | |
296 | static int hda_tegra_halt(struct notifier_block *nb, unsigned long event, | |
297 | void *buf) | |
298 | { | |
299 | struct azx *chip = container_of(nb, struct azx, reboot_notifier); | |
300 | snd_hda_bus_reboot_notify(chip->bus); | |
301 | azx_stop_chip(chip); | |
302 | return NOTIFY_OK; | |
303 | } | |
304 | ||
305 | static void hda_tegra_notifier_register(struct azx *chip) | |
306 | { | |
307 | chip->reboot_notifier.notifier_call = hda_tegra_halt; | |
308 | register_reboot_notifier(&chip->reboot_notifier); | |
309 | } | |
310 | ||
311 | static void hda_tegra_notifier_unregister(struct azx *chip) | |
312 | { | |
313 | if (chip->reboot_notifier.notifier_call) | |
314 | unregister_reboot_notifier(&chip->reboot_notifier); | |
315 | } | |
316 | ||
317 | /* | |
318 | * destructor | |
319 | */ | |
320 | static int hda_tegra_dev_free(struct snd_device *device) | |
321 | { | |
322 | int i; | |
323 | struct azx *chip = device->device_data; | |
324 | ||
325 | hda_tegra_notifier_unregister(chip); | |
326 | ||
327 | if (chip->initialized) { | |
328 | for (i = 0; i < chip->num_streams; i++) | |
329 | azx_stream_stop(chip, &chip->azx_dev[i]); | |
330 | azx_stop_chip(chip); | |
331 | } | |
332 | ||
333 | azx_free_stream_pages(chip); | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
338 | static int hda_tegra_init_chip(struct azx *chip, struct platform_device *pdev) | |
339 | { | |
340 | struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip); | |
341 | struct device *dev = hda->dev; | |
342 | struct resource *res; | |
343 | int err; | |
344 | ||
345 | hda->hda_clk = devm_clk_get(dev, "hda"); | |
346 | if (IS_ERR(hda->hda_clk)) | |
347 | return PTR_ERR(hda->hda_clk); | |
348 | hda->hda2codec_2x_clk = devm_clk_get(dev, "hda2codec_2x"); | |
349 | if (IS_ERR(hda->hda2codec_2x_clk)) | |
350 | return PTR_ERR(hda->hda2codec_2x_clk); | |
351 | hda->hda2hdmi_clk = devm_clk_get(dev, "hda2hdmi"); | |
352 | if (IS_ERR(hda->hda2hdmi_clk)) | |
353 | return PTR_ERR(hda->hda2hdmi_clk); | |
354 | ||
355 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
356 | hda->regs = devm_ioremap_resource(dev, res); | |
357 | if (IS_ERR(chip->remap_addr)) | |
358 | return PTR_ERR(chip->remap_addr); | |
359 | ||
360 | chip->remap_addr = hda->regs + HDA_BAR0; | |
361 | chip->addr = res->start + HDA_BAR0; | |
362 | ||
363 | err = hda_tegra_enable_clocks(hda); | |
364 | if (err) | |
365 | return err; | |
366 | ||
367 | hda_tegra_init(hda); | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | /* | |
373 | * The codecs were powered up in snd_hda_codec_new(). | |
374 | * Now all initialization done, so turn them down if possible | |
375 | */ | |
376 | static void power_down_all_codecs(struct azx *chip) | |
377 | { | |
378 | struct hda_codec *codec; | |
379 | list_for_each_entry(codec, &chip->bus->codec_list, list) | |
380 | snd_hda_power_down(codec); | |
381 | } | |
382 | ||
383 | static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev) | |
384 | { | |
385 | struct snd_card *card = chip->card; | |
386 | int err; | |
387 | unsigned short gcap; | |
388 | int irq_id = platform_get_irq(pdev, 0); | |
389 | ||
390 | err = hda_tegra_init_chip(chip, pdev); | |
391 | if (err) | |
392 | return err; | |
393 | ||
394 | err = devm_request_irq(chip->card->dev, irq_id, azx_interrupt, | |
395 | IRQF_SHARED, KBUILD_MODNAME, chip); | |
396 | if (err) { | |
397 | dev_err(chip->card->dev, | |
398 | "unable to request IRQ %d, disabling device\n", | |
399 | irq_id); | |
400 | return err; | |
401 | } | |
402 | chip->irq = irq_id; | |
403 | ||
404 | synchronize_irq(chip->irq); | |
405 | ||
406 | gcap = azx_readw(chip, GCAP); | |
407 | dev_dbg(card->dev, "chipset global capabilities = 0x%x\n", gcap); | |
408 | ||
409 | /* read number of streams from GCAP register instead of using | |
410 | * hardcoded value | |
411 | */ | |
412 | chip->capture_streams = (gcap >> 8) & 0x0f; | |
413 | chip->playback_streams = (gcap >> 12) & 0x0f; | |
414 | if (!chip->playback_streams && !chip->capture_streams) { | |
415 | /* gcap didn't give any info, switching to old method */ | |
416 | chip->playback_streams = NUM_PLAYBACK_SD; | |
417 | chip->capture_streams = NUM_CAPTURE_SD; | |
418 | } | |
419 | chip->capture_index_offset = 0; | |
420 | chip->playback_index_offset = chip->capture_streams; | |
421 | chip->num_streams = chip->playback_streams + chip->capture_streams; | |
422 | chip->azx_dev = devm_kcalloc(card->dev, chip->num_streams, | |
423 | sizeof(*chip->azx_dev), GFP_KERNEL); | |
424 | if (!chip->azx_dev) | |
425 | return -ENOMEM; | |
426 | ||
427 | err = azx_alloc_stream_pages(chip); | |
428 | if (err < 0) | |
429 | return err; | |
430 | ||
431 | /* initialize streams */ | |
432 | azx_init_stream(chip); | |
433 | ||
434 | /* initialize chip */ | |
435 | azx_init_chip(chip, 1); | |
436 | ||
437 | /* codec detection */ | |
438 | if (!chip->codec_mask) { | |
439 | dev_err(card->dev, "no codecs found!\n"); | |
440 | return -ENODEV; | |
441 | } | |
442 | ||
443 | strcpy(card->driver, "tegra-hda"); | |
444 | strcpy(card->shortname, "tegra-hda"); | |
445 | snprintf(card->longname, sizeof(card->longname), | |
446 | "%s at 0x%lx irq %i", | |
447 | card->shortname, chip->addr, chip->irq); | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
452 | /* | |
453 | * constructor | |
454 | */ | |
455 | static int hda_tegra_create(struct snd_card *card, | |
456 | unsigned int driver_caps, | |
457 | const struct hda_controller_ops *hda_ops, | |
458 | struct hda_tegra *hda) | |
459 | { | |
460 | static struct snd_device_ops ops = { | |
461 | .dev_free = hda_tegra_dev_free, | |
462 | }; | |
463 | struct azx *chip; | |
464 | int err; | |
465 | ||
466 | chip = &hda->chip; | |
467 | ||
468 | spin_lock_init(&chip->reg_lock); | |
469 | mutex_init(&chip->open_mutex); | |
470 | chip->card = card; | |
471 | chip->ops = hda_ops; | |
472 | chip->irq = -1; | |
473 | chip->driver_caps = driver_caps; | |
474 | chip->driver_type = driver_caps & 0xff; | |
475 | chip->dev_index = 0; | |
476 | INIT_LIST_HEAD(&chip->pcm_list); | |
477 | INIT_LIST_HEAD(&chip->list); | |
478 | ||
479 | chip->position_fix[0] = POS_FIX_AUTO; | |
480 | chip->position_fix[1] = POS_FIX_AUTO; | |
481 | chip->codec_probe_mask = -1; | |
482 | ||
483 | chip->single_cmd = false; | |
484 | chip->snoop = true; | |
485 | ||
486 | err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); | |
487 | if (err < 0) { | |
488 | dev_err(card->dev, "Error creating device\n"); | |
489 | return err; | |
490 | } | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
495 | static const struct of_device_id hda_tegra_match[] = { | |
496 | { .compatible = "nvidia,tegra30-hda" }, | |
497 | {}, | |
498 | }; | |
499 | MODULE_DEVICE_TABLE(of, tegra_platform_hda_match); | |
500 | ||
501 | static int hda_tegra_probe(struct platform_device *pdev) | |
502 | { | |
503 | struct snd_card *card; | |
504 | struct azx *chip; | |
505 | struct hda_tegra *hda; | |
506 | int err; | |
507 | const unsigned int driver_flags = AZX_DCAPS_RIRB_DELAY; | |
508 | ||
509 | hda = devm_kzalloc(&pdev->dev, sizeof(*hda), GFP_KERNEL); | |
510 | if (!hda) | |
511 | return -ENOMEM; | |
512 | hda->dev = &pdev->dev; | |
513 | chip = &hda->chip; | |
514 | ||
515 | err = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, | |
516 | THIS_MODULE, 0, &card); | |
517 | if (err < 0) { | |
518 | dev_err(&pdev->dev, "Error creating card!\n"); | |
519 | return err; | |
520 | } | |
521 | ||
522 | err = hda_tegra_create(card, driver_flags, &hda_tegra_ops, hda); | |
523 | if (err < 0) | |
524 | goto out_free; | |
525 | card->private_data = chip; | |
526 | ||
527 | dev_set_drvdata(&pdev->dev, card); | |
528 | ||
529 | err = hda_tegra_first_init(chip, pdev); | |
530 | if (err < 0) | |
531 | goto out_free; | |
532 | ||
533 | /* create codec instances */ | |
534 | err = azx_codec_create(chip, NULL, 0, &power_save); | |
535 | if (err < 0) | |
536 | goto out_free; | |
537 | ||
538 | err = azx_codec_configure(chip); | |
539 | if (err < 0) | |
540 | goto out_free; | |
541 | ||
542 | /* create PCM streams */ | |
543 | err = snd_hda_build_pcms(chip->bus); | |
544 | if (err < 0) | |
545 | goto out_free; | |
546 | ||
547 | /* create mixer controls */ | |
548 | err = azx_mixer_create(chip); | |
549 | if (err < 0) | |
550 | goto out_free; | |
551 | ||
552 | err = snd_card_register(chip->card); | |
553 | if (err < 0) | |
554 | goto out_free; | |
555 | ||
556 | chip->running = 1; | |
557 | power_down_all_codecs(chip); | |
558 | hda_tegra_notifier_register(chip); | |
559 | ||
560 | return 0; | |
561 | ||
562 | out_free: | |
563 | snd_card_free(card); | |
564 | return err; | |
565 | } | |
566 | ||
567 | static int hda_tegra_remove(struct platform_device *pdev) | |
568 | { | |
569 | return snd_card_free(dev_get_drvdata(&pdev->dev)); | |
570 | } | |
571 | ||
572 | static struct platform_driver tegra_platform_hda = { | |
573 | .driver = { | |
574 | .name = "tegra-hda", | |
575 | .pm = &hda_tegra_pm, | |
576 | .of_match_table = hda_tegra_match, | |
577 | }, | |
578 | .probe = hda_tegra_probe, | |
579 | .remove = hda_tegra_remove, | |
580 | }; | |
581 | module_platform_driver(tegra_platform_hda); | |
582 | ||
583 | MODULE_DESCRIPTION("Tegra HDA bus driver"); | |
584 | MODULE_LICENSE("GPL v2"); |