1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * tegra30_ahub.c - Tegra30 AHUB driver
4 *
5 * Copyright (c) 2011,2012, NVIDIA CORPORATION. All rights reserved.
6 */
7
8#include <linux/clk.h>
9#include <linux/device.h>
10#include <linux/io.h>
11#include <linux/module.h>
12#include <linux/of_platform.h>
13#include <linux/platform_device.h>
14#include <linux/pm_runtime.h>
15#include <linux/regmap.h>
16#include <linux/reset.h>
17#include <linux/slab.h>
18#include <sound/soc.h>
19#include "tegra30_ahub.h"
20
21#define DRV_NAME "tegra30-ahub"
22
23static struct tegra30_ahub *ahub;
24
25static inline void tegra30_apbif_write(u32 reg, u32 val)
26{
27 regmap_write(map: ahub->regmap_apbif, reg, val);
28}
29
30static inline u32 tegra30_apbif_read(u32 reg)
31{
32 u32 val;
33
34 regmap_read(map: ahub->regmap_apbif, reg, val: &val);
35 return val;
36}
37
38static inline void tegra30_audio_write(u32 reg, u32 val)
39{
40 regmap_write(map: ahub->regmap_ahub, reg, val);
41}
42
43static int tegra30_ahub_runtime_suspend(struct device *dev)
44{
45 regcache_cache_only(map: ahub->regmap_apbif, enable: true);
46 regcache_cache_only(map: ahub->regmap_ahub, enable: true);
47
48 clk_bulk_disable_unprepare(num_clks: ahub->nclocks, clks: ahub->clocks);
49
50 return 0;
51}
52
53/*
54 * clk_apbif isn't required for an I2S<->I2S configuration where no PCM data
55 * is read from or sent to memory. However, that's not something the rest of
56 * the driver supports right now, so we'll just treat the two clocks as one
57 * for now.
58 *
59 * These functions should not be a plain ref-count. Instead, each active stream
60 * contributes some requirement to the minimum clock rate, so starting or
61 * stopping streams should dynamically adjust the clock as required. However,
62 * this is not yet implemented.
63 */
64static int tegra30_ahub_runtime_resume(struct device *dev)
65{
66 int ret;
67
68 ret = reset_control_bulk_assert(num_rstcs: ahub->nresets, rstcs: ahub->resets);
69 if (ret)
70 return ret;
71
72 ret = clk_bulk_prepare_enable(num_clks: ahub->nclocks, clks: ahub->clocks);
73 if (ret)
74 return ret;
75
76 usleep_range(min: 10, max: 100);
77
78 ret = reset_control_bulk_deassert(num_rstcs: ahub->nresets, rstcs: ahub->resets);
79 if (ret)
80 goto disable_clocks;
81
82 regcache_cache_only(map: ahub->regmap_apbif, enable: false);
83 regcache_cache_only(map: ahub->regmap_ahub, enable: false);
84 regcache_mark_dirty(map: ahub->regmap_apbif);
85 regcache_mark_dirty(map: ahub->regmap_ahub);
86
87 ret = regcache_sync(map: ahub->regmap_apbif);
88 if (ret)
89 goto disable_clocks;
90
91 ret = regcache_sync(map: ahub->regmap_ahub);
92 if (ret)
93 goto disable_clocks;
94
95 return 0;
96
97disable_clocks:
98 clk_bulk_disable_unprepare(num_clks: ahub->nclocks, clks: ahub->clocks);
99
100 return ret;
101}
102
103int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
104 char *dmachan, int dmachan_len,
105 dma_addr_t *fiforeg)
106{
107 int channel;
108 u32 reg, val;
109 struct tegra30_ahub_cif_conf cif_conf;
110
111 channel = find_first_zero_bit(addr: ahub->rx_usage,
112 TEGRA30_AHUB_CHANNEL_CTRL_COUNT);
113 if (channel >= TEGRA30_AHUB_CHANNEL_CTRL_COUNT)
114 return -EBUSY;
115
116 __set_bit(channel, ahub->rx_usage);
117
118 *rxcif = TEGRA30_AHUB_RXCIF_APBIF_RX0 + channel;
119 snprintf(buf: dmachan, size: dmachan_len, fmt: "rx%d", channel);
120 *fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_RXFIFO +
121 (channel * TEGRA30_AHUB_CHANNEL_RXFIFO_STRIDE);
122
123 pm_runtime_get_sync(dev: ahub->dev);
124
125 reg = TEGRA30_AHUB_CHANNEL_CTRL +
126 (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
127 val = tegra30_apbif_read(reg);
128 val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
129 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
130 val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
131 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
132 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
133 tegra30_apbif_write(reg, val);
134
135 cif_conf.threshold = 0;
136 cif_conf.audio_channels = 2;
137 cif_conf.client_channels = 2;
138 cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
139 cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
140 cif_conf.expand = 0;
141 cif_conf.stereo_conv = 0;
142 cif_conf.replicate = 0;
143 cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
144 cif_conf.truncate = 0;
145 cif_conf.mono_conv = 0;
146
147 reg = TEGRA30_AHUB_CIF_RX_CTRL +
148 (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
149 ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
150
151 pm_runtime_put(dev: ahub->dev);
152
153 return 0;
154}
155EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_rx_fifo);
156
157int tegra30_ahub_enable_rx_fifo(enum tegra30_ahub_rxcif rxcif)
158{
159 int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
160 int reg, val;
161
162 pm_runtime_get_sync(dev: ahub->dev);
163
164 reg = TEGRA30_AHUB_CHANNEL_CTRL +
165 (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
166 val = tegra30_apbif_read(reg);
167 val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_EN;
168 tegra30_apbif_write(reg, val);
169
170 pm_runtime_put(dev: ahub->dev);
171
172 return 0;
173}
174EXPORT_SYMBOL_GPL(tegra30_ahub_enable_rx_fifo);
175
176int tegra30_ahub_disable_rx_fifo(enum tegra30_ahub_rxcif rxcif)
177{
178 int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
179 int reg, val;
180
181 pm_runtime_get_sync(dev: ahub->dev);
182
183 reg = TEGRA30_AHUB_CHANNEL_CTRL +
184 (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
185 val = tegra30_apbif_read(reg);
186 val &= ~TEGRA30_AHUB_CHANNEL_CTRL_RX_EN;
187 tegra30_apbif_write(reg, val);
188
189 pm_runtime_put(dev: ahub->dev);
190
191 return 0;
192}
193EXPORT_SYMBOL_GPL(tegra30_ahub_disable_rx_fifo);
194
195int tegra30_ahub_free_rx_fifo(enum tegra30_ahub_rxcif rxcif)
196{
197 int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
198
199 __clear_bit(channel, ahub->rx_usage);
200
201 return 0;
202}
203EXPORT_SYMBOL_GPL(tegra30_ahub_free_rx_fifo);
204
205int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
206 char *dmachan, int dmachan_len,
207 dma_addr_t *fiforeg)
208{
209 int channel;
210 u32 reg, val;
211 struct tegra30_ahub_cif_conf cif_conf;
212
213 channel = find_first_zero_bit(addr: ahub->tx_usage,
214 TEGRA30_AHUB_CHANNEL_CTRL_COUNT);
215 if (channel >= TEGRA30_AHUB_CHANNEL_CTRL_COUNT)
216 return -EBUSY;
217
218 __set_bit(channel, ahub->tx_usage);
219
220 *txcif = TEGRA30_AHUB_TXCIF_APBIF_TX0 + channel;
221 snprintf(buf: dmachan, size: dmachan_len, fmt: "tx%d", channel);
222 *fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_TXFIFO +
223 (channel * TEGRA30_AHUB_CHANNEL_TXFIFO_STRIDE);
224
225 pm_runtime_get_sync(dev: ahub->dev);
226
227 reg = TEGRA30_AHUB_CHANNEL_CTRL +
228 (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
229 val = tegra30_apbif_read(reg);
230 val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
231 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
232 val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
233 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
234 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
235 tegra30_apbif_write(reg, val);
236
237 cif_conf.threshold = 0;
238 cif_conf.audio_channels = 2;
239 cif_conf.client_channels = 2;
240 cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
241 cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
242 cif_conf.expand = 0;
243 cif_conf.stereo_conv = 0;
244 cif_conf.replicate = 0;
245 cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
246 cif_conf.truncate = 0;
247 cif_conf.mono_conv = 0;
248
249 reg = TEGRA30_AHUB_CIF_TX_CTRL +
250 (channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
251 ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
252
253 pm_runtime_put(dev: ahub->dev);
254
255 return 0;
256}
257EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_tx_fifo);
258
259int tegra30_ahub_enable_tx_fifo(enum tegra30_ahub_txcif txcif)
260{
261 int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
262 int reg, val;
263
264 pm_runtime_get_sync(dev: ahub->dev);
265
266 reg = TEGRA30_AHUB_CHANNEL_CTRL +
267 (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
268 val = tegra30_apbif_read(reg);
269 val |= TEGRA30_AHUB_CHANNEL_CTRL_TX_EN;
270 tegra30_apbif_write(reg, val);
271
272 pm_runtime_put(dev: ahub->dev);
273
274 return 0;
275}
276EXPORT_SYMBOL_GPL(tegra30_ahub_enable_tx_fifo);
277
278int tegra30_ahub_disable_tx_fifo(enum tegra30_ahub_txcif txcif)
279{
280 int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
281 int reg, val;
282
283 pm_runtime_get_sync(dev: ahub->dev);
284
285 reg = TEGRA30_AHUB_CHANNEL_CTRL +
286 (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
287 val = tegra30_apbif_read(reg);
288 val &= ~TEGRA30_AHUB_CHANNEL_CTRL_TX_EN;
289 tegra30_apbif_write(reg, val);
290
291 pm_runtime_put(dev: ahub->dev);
292
293 return 0;
294}
295EXPORT_SYMBOL_GPL(tegra30_ahub_disable_tx_fifo);
296
297int tegra30_ahub_free_tx_fifo(enum tegra30_ahub_txcif txcif)
298{
299 int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
300
301 __clear_bit(channel, ahub->tx_usage);
302
303 return 0;
304}
305EXPORT_SYMBOL_GPL(tegra30_ahub_free_tx_fifo);
306
307int tegra30_ahub_set_rx_cif_source(enum tegra30_ahub_rxcif rxcif,
308 enum tegra30_ahub_txcif txcif)
309{
310 int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
311 int reg;
312
313 pm_runtime_get_sync(dev: ahub->dev);
314
315 reg = TEGRA30_AHUB_AUDIO_RX +
316 (channel * TEGRA30_AHUB_AUDIO_RX_STRIDE);
317 tegra30_audio_write(reg, val: 1 << txcif);
318
319 pm_runtime_put(dev: ahub->dev);
320
321 return 0;
322}
323EXPORT_SYMBOL_GPL(tegra30_ahub_set_rx_cif_source);
324
325int tegra30_ahub_unset_rx_cif_source(enum tegra30_ahub_rxcif rxcif)
326{
327 int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
328 int reg;
329
330 pm_runtime_get_sync(dev: ahub->dev);
331
332 reg = TEGRA30_AHUB_AUDIO_RX +
333 (channel * TEGRA30_AHUB_AUDIO_RX_STRIDE);
334 tegra30_audio_write(reg, val: 0);
335
336 pm_runtime_put(dev: ahub->dev);
337
338 return 0;
339}
340EXPORT_SYMBOL_GPL(tegra30_ahub_unset_rx_cif_source);
341
342static const struct reset_control_bulk_data tegra30_ahub_resets_data[] = {
343 { "d_audio" },
344 { "apbif" },
345 { "i2s0" },
346 { "i2s1" },
347 { "i2s2" },
348 { "i2s3" },
349 { "i2s4" },
350 { "dam0" },
351 { "dam1" },
352 { "dam2" },
353 { "spdif" },
354 { "amx" }, /* Tegra114+ */
355 { "adx" }, /* Tegra114+ */
356 { "amx1" }, /* Tegra124 */
357 { "adx1" }, /* Tegra124 */
358 { "afc0" }, /* Tegra124 */
359 { "afc1" }, /* Tegra124 */
360 { "afc2" }, /* Tegra124 */
361 { "afc3" }, /* Tegra124 */
362 { "afc4" }, /* Tegra124 */
363 { "afc5" }, /* Tegra124 */
364};
365
366#define LAST_REG(name) \
367 (TEGRA30_AHUB_##name + \
368 (TEGRA30_AHUB_##name##_STRIDE * TEGRA30_AHUB_##name##_COUNT) - 4)
369
370#define REG_IN_ARRAY(reg, name) \
371 ((reg >= TEGRA30_AHUB_##name) && \
372 (reg <= LAST_REG(name) && \
373 (!((reg - TEGRA30_AHUB_##name) % TEGRA30_AHUB_##name##_STRIDE))))
374
375static bool tegra30_ahub_apbif_wr_rd_reg(struct device *dev, unsigned int reg)
376{
377 switch (reg) {
378 case TEGRA30_AHUB_CONFIG_LINK_CTRL:
379 case TEGRA30_AHUB_MISC_CTRL:
380 case TEGRA30_AHUB_APBDMA_LIVE_STATUS:
381 case TEGRA30_AHUB_I2S_LIVE_STATUS:
382 case TEGRA30_AHUB_SPDIF_LIVE_STATUS:
383 case TEGRA30_AHUB_I2S_INT_MASK:
384 case TEGRA30_AHUB_DAM_INT_MASK:
385 case TEGRA30_AHUB_SPDIF_INT_MASK:
386 case TEGRA30_AHUB_APBIF_INT_MASK:
387 case TEGRA30_AHUB_I2S_INT_STATUS:
388 case TEGRA30_AHUB_DAM_INT_STATUS:
389 case TEGRA30_AHUB_SPDIF_INT_STATUS:
390 case TEGRA30_AHUB_APBIF_INT_STATUS:
391 case TEGRA30_AHUB_I2S_INT_SOURCE:
392 case TEGRA30_AHUB_DAM_INT_SOURCE:
393 case TEGRA30_AHUB_SPDIF_INT_SOURCE:
394 case TEGRA30_AHUB_APBIF_INT_SOURCE:
395 case TEGRA30_AHUB_I2S_INT_SET:
396 case TEGRA30_AHUB_DAM_INT_SET:
397 case TEGRA30_AHUB_SPDIF_INT_SET:
398 case TEGRA30_AHUB_APBIF_INT_SET:
399 return true;
400 default:
401 break;
402 }
403
404 if (REG_IN_ARRAY(reg, CHANNEL_CTRL) ||
405 REG_IN_ARRAY(reg, CHANNEL_CLEAR) ||
406 REG_IN_ARRAY(reg, CHANNEL_STATUS) ||
407 REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
408 REG_IN_ARRAY(reg, CHANNEL_RXFIFO) ||
409 REG_IN_ARRAY(reg, CIF_TX_CTRL) ||
410 REG_IN_ARRAY(reg, CIF_RX_CTRL) ||
411 REG_IN_ARRAY(reg, DAM_LIVE_STATUS))
412 return true;
413
414 return false;
415}
416
417static bool tegra30_ahub_apbif_volatile_reg(struct device *dev,
418 unsigned int reg)
419{
420 switch (reg) {
421 case TEGRA30_AHUB_CONFIG_LINK_CTRL:
422 case TEGRA30_AHUB_MISC_CTRL:
423 case TEGRA30_AHUB_APBDMA_LIVE_STATUS:
424 case TEGRA30_AHUB_I2S_LIVE_STATUS:
425 case TEGRA30_AHUB_SPDIF_LIVE_STATUS:
426 case TEGRA30_AHUB_I2S_INT_STATUS:
427 case TEGRA30_AHUB_DAM_INT_STATUS:
428 case TEGRA30_AHUB_SPDIF_INT_STATUS:
429 case TEGRA30_AHUB_APBIF_INT_STATUS:
430 case TEGRA30_AHUB_I2S_INT_SET:
431 case TEGRA30_AHUB_DAM_INT_SET:
432 case TEGRA30_AHUB_SPDIF_INT_SET:
433 case TEGRA30_AHUB_APBIF_INT_SET:
434 return true;
435 default:
436 break;
437 }
438
439 if (REG_IN_ARRAY(reg, CHANNEL_CLEAR) ||
440 REG_IN_ARRAY(reg, CHANNEL_STATUS) ||
441 REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
442 REG_IN_ARRAY(reg, CHANNEL_RXFIFO) ||
443 REG_IN_ARRAY(reg, DAM_LIVE_STATUS))
444 return true;
445
446 return false;
447}
448
449static bool tegra30_ahub_apbif_precious_reg(struct device *dev,
450 unsigned int reg)
451{
452 if (REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
453 REG_IN_ARRAY(reg, CHANNEL_RXFIFO))
454 return true;
455
456 return false;
457}
458
459static const struct regmap_config tegra30_ahub_apbif_regmap_config = {
460 .name = "apbif",
461 .reg_bits = 32,
462 .val_bits = 32,
463 .reg_stride = 4,
464 .max_register = TEGRA30_AHUB_APBIF_INT_SET,
465 .writeable_reg = tegra30_ahub_apbif_wr_rd_reg,
466 .readable_reg = tegra30_ahub_apbif_wr_rd_reg,
467 .volatile_reg = tegra30_ahub_apbif_volatile_reg,
468 .precious_reg = tegra30_ahub_apbif_precious_reg,
469 .cache_type = REGCACHE_FLAT,
470};
471
472static bool tegra30_ahub_ahub_wr_rd_reg(struct device *dev, unsigned int reg)
473{
474 if (REG_IN_ARRAY(reg, AUDIO_RX))
475 return true;
476
477 return false;
478}
479
480static const struct regmap_config tegra30_ahub_ahub_regmap_config = {
481 .name = "ahub",
482 .reg_bits = 32,
483 .val_bits = 32,
484 .reg_stride = 4,
485 .max_register = LAST_REG(AUDIO_RX),
486 .writeable_reg = tegra30_ahub_ahub_wr_rd_reg,
487 .readable_reg = tegra30_ahub_ahub_wr_rd_reg,
488 .cache_type = REGCACHE_FLAT,
489};
490
491static struct tegra30_ahub_soc_data soc_data_tegra30 = {
492 .num_resets = 11,
493 .set_audio_cif = tegra30_ahub_set_cif,
494};
495
496static struct tegra30_ahub_soc_data soc_data_tegra114 = {
497 .num_resets = 13,
498 .set_audio_cif = tegra30_ahub_set_cif,
499};
500
501static struct tegra30_ahub_soc_data soc_data_tegra124 = {
502 .num_resets = 21,
503 .set_audio_cif = tegra124_ahub_set_cif,
504};
505
506static const struct of_device_id tegra30_ahub_of_match[] = {
507 { .compatible = "nvidia,tegra124-ahub", .data = &soc_data_tegra124 },
508 { .compatible = "nvidia,tegra114-ahub", .data = &soc_data_tegra114 },
509 { .compatible = "nvidia,tegra30-ahub", .data = &soc_data_tegra30 },
510 {},
511};
512
513static int tegra30_ahub_probe(struct platform_device *pdev)
514{
515 const struct tegra30_ahub_soc_data *soc_data;
516 struct resource *res0;
517 void __iomem *regs_apbif, *regs_ahub;
518 int ret = 0;
519
520 soc_data = of_device_get_match_data(dev: &pdev->dev);
521 if (!soc_data)
522 return -EINVAL;
523
524 ahub = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct tegra30_ahub),
525 GFP_KERNEL);
526 if (!ahub)
527 return -ENOMEM;
528 dev_set_drvdata(dev: &pdev->dev, data: ahub);
529
530 BUILD_BUG_ON(sizeof(ahub->resets) != sizeof(tegra30_ahub_resets_data));
531 memcpy(ahub->resets, tegra30_ahub_resets_data, sizeof(ahub->resets));
532
533 ahub->nresets = soc_data->num_resets;
534 ahub->soc_data = soc_data;
535 ahub->dev = &pdev->dev;
536
537 ahub->clocks[ahub->nclocks++].id = "apbif";
538 ahub->clocks[ahub->nclocks++].id = "d_audio";
539
540 ret = devm_clk_bulk_get(dev: &pdev->dev, num_clks: ahub->nclocks, clks: ahub->clocks);
541 if (ret)
542 goto err_unset_ahub;
543
544 ret = devm_reset_control_bulk_get_exclusive(dev: &pdev->dev, num_rstcs: ahub->nresets,
545 rstcs: ahub->resets);
546 if (ret) {
547 dev_err(&pdev->dev, "Can't get resets: %d\n", ret);
548 goto err_unset_ahub;
549 }
550
551 regs_apbif = devm_platform_get_and_ioremap_resource(pdev, index: 0, res: &res0);
552 if (IS_ERR(ptr: regs_apbif)) {
553 ret = PTR_ERR(ptr: regs_apbif);
554 goto err_unset_ahub;
555 }
556
557 ahub->apbif_addr = res0->start;
558
559 ahub->regmap_apbif = devm_regmap_init_mmio(&pdev->dev, regs_apbif,
560 &tegra30_ahub_apbif_regmap_config);
561 if (IS_ERR(ptr: ahub->regmap_apbif)) {
562 dev_err(&pdev->dev, "apbif regmap init failed\n");
563 ret = PTR_ERR(ptr: ahub->regmap_apbif);
564 goto err_unset_ahub;
565 }
566 regcache_cache_only(map: ahub->regmap_apbif, enable: true);
567
568 regs_ahub = devm_platform_ioremap_resource(pdev, index: 1);
569 if (IS_ERR(ptr: regs_ahub)) {
570 ret = PTR_ERR(ptr: regs_ahub);
571 goto err_unset_ahub;
572 }
573
574 ahub->regmap_ahub = devm_regmap_init_mmio(&pdev->dev, regs_ahub,
575 &tegra30_ahub_ahub_regmap_config);
576 if (IS_ERR(ptr: ahub->regmap_ahub)) {
577 dev_err(&pdev->dev, "ahub regmap init failed\n");
578 ret = PTR_ERR(ptr: ahub->regmap_ahub);
579 goto err_unset_ahub;
580 }
581 regcache_cache_only(map: ahub->regmap_ahub, enable: true);
582
583 pm_runtime_enable(dev: &pdev->dev);
584
585 of_platform_populate(root: pdev->dev.of_node, NULL, NULL, parent: &pdev->dev);
586
587 return 0;
588
589err_unset_ahub:
590 ahub = NULL;
591
592 return ret;
593}
594
595static void tegra30_ahub_remove(struct platform_device *pdev)
596{
597 pm_runtime_disable(dev: &pdev->dev);
598
599 ahub = NULL;
600}
601
602static const struct dev_pm_ops tegra30_ahub_pm_ops = {
603 RUNTIME_PM_OPS(tegra30_ahub_runtime_suspend,
604 tegra30_ahub_runtime_resume, NULL)
605 SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
606};
607
608static struct platform_driver tegra30_ahub_driver = {
609 .probe = tegra30_ahub_probe,
610 .remove = tegra30_ahub_remove,
611 .driver = {
612 .name = DRV_NAME,
613 .of_match_table = tegra30_ahub_of_match,
614 .pm = pm_ptr(&tegra30_ahub_pm_ops),
615 },
616};
617module_platform_driver(tegra30_ahub_driver);
618
619void tegra30_ahub_set_cif(struct regmap *regmap, unsigned int reg,
620 struct tegra30_ahub_cif_conf *conf)
621{
622 unsigned int value;
623
624 value = (conf->threshold <<
625 TEGRA30_AUDIOCIF_CTRL_FIFO_THRESHOLD_SHIFT) |
626 ((conf->audio_channels - 1) <<
627 TEGRA30_AUDIOCIF_CTRL_AUDIO_CHANNELS_SHIFT) |
628 ((conf->client_channels - 1) <<
629 TEGRA30_AUDIOCIF_CTRL_CLIENT_CHANNELS_SHIFT) |
630 (conf->audio_bits <<
631 TEGRA30_AUDIOCIF_CTRL_AUDIO_BITS_SHIFT) |
632 (conf->client_bits <<
633 TEGRA30_AUDIOCIF_CTRL_CLIENT_BITS_SHIFT) |
634 (conf->expand <<
635 TEGRA30_AUDIOCIF_CTRL_EXPAND_SHIFT) |
636 (conf->stereo_conv <<
637 TEGRA30_AUDIOCIF_CTRL_STEREO_CONV_SHIFT) |
638 (conf->replicate <<
639 TEGRA30_AUDIOCIF_CTRL_REPLICATE_SHIFT) |
640 (conf->direction <<
641 TEGRA30_AUDIOCIF_CTRL_DIRECTION_SHIFT) |
642 (conf->truncate <<
643 TEGRA30_AUDIOCIF_CTRL_TRUNCATE_SHIFT) |
644 (conf->mono_conv <<
645 TEGRA30_AUDIOCIF_CTRL_MONO_CONV_SHIFT);
646
647 regmap_write(map: regmap, reg, val: value);
648}
649EXPORT_SYMBOL_GPL(tegra30_ahub_set_cif);
650
651void tegra124_ahub_set_cif(struct regmap *regmap, unsigned int reg,
652 struct tegra30_ahub_cif_conf *conf)
653{
654 unsigned int value;
655
656 value = (conf->threshold <<
657 TEGRA124_AUDIOCIF_CTRL_FIFO_THRESHOLD_SHIFT) |
658 ((conf->audio_channels - 1) <<
659 TEGRA124_AUDIOCIF_CTRL_AUDIO_CHANNELS_SHIFT) |
660 ((conf->client_channels - 1) <<
661 TEGRA124_AUDIOCIF_CTRL_CLIENT_CHANNELS_SHIFT) |
662 (conf->audio_bits <<
663 TEGRA30_AUDIOCIF_CTRL_AUDIO_BITS_SHIFT) |
664 (conf->client_bits <<
665 TEGRA30_AUDIOCIF_CTRL_CLIENT_BITS_SHIFT) |
666 (conf->expand <<
667 TEGRA30_AUDIOCIF_CTRL_EXPAND_SHIFT) |
668 (conf->stereo_conv <<
669 TEGRA30_AUDIOCIF_CTRL_STEREO_CONV_SHIFT) |
670 (conf->replicate <<
671 TEGRA30_AUDIOCIF_CTRL_REPLICATE_SHIFT) |
672 (conf->direction <<
673 TEGRA30_AUDIOCIF_CTRL_DIRECTION_SHIFT) |
674 (conf->truncate <<
675 TEGRA30_AUDIOCIF_CTRL_TRUNCATE_SHIFT) |
676 (conf->mono_conv <<
677 TEGRA30_AUDIOCIF_CTRL_MONO_CONV_SHIFT);
678
679 regmap_write(map: regmap, reg, val: value);
680}
681EXPORT_SYMBOL_GPL(tegra124_ahub_set_cif);
682
683MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
684MODULE_DESCRIPTION("Tegra30 AHUB driver");
685MODULE_LICENSE("GPL v2");
686MODULE_ALIAS("platform:" DRV_NAME);
687MODULE_DEVICE_TABLE(of, tegra30_ahub_of_match);
688

source code of linux/sound/soc/tegra/tegra30_ahub.c