1// SPDX-License-Identifier: GPL-2.0
2//
3// rt711-sdw.c -- rt711 ALSA SoC audio driver
4//
5// Copyright(c) 2019 Realtek Semiconductor Corp.
6//
7//
8
9#include <linux/delay.h>
10#include <linux/device.h>
11#include <linux/mod_devicetable.h>
12#include <linux/soundwire/sdw.h>
13#include <linux/soundwire/sdw_type.h>
14#include <linux/soundwire/sdw_registers.h>
15#include <linux/module.h>
16#include <linux/pm_runtime.h>
17#include <linux/regmap.h>
18#include <sound/soc.h>
19#include "rt711.h"
20#include "rt711-sdw.h"
21
22static bool rt711_readable_register(struct device *dev, unsigned int reg)
23{
24 switch (reg) {
25 case 0x00e0:
26 case 0x00f0:
27 case 0x2012 ... 0x2016:
28 case 0x201a ... 0x2027:
29 case 0x2029 ... 0x202a:
30 case 0x202d ... 0x2034:
31 case 0x2201 ... 0x2204:
32 case 0x2206 ... 0x2212:
33 case 0x2220 ... 0x2223:
34 case 0x2230 ... 0x2239:
35 case 0x2f01 ... 0x2f0f:
36 case 0x3000 ... 0x3fff:
37 case 0x7000 ... 0x7fff:
38 case 0x8300 ... 0x83ff:
39 case 0x9c00 ... 0x9cff:
40 case 0xb900 ... 0xb9ff:
41 case 0x752008:
42 case 0x752009:
43 case 0x75200b:
44 case 0x752011:
45 case 0x75201a:
46 case 0x752045:
47 case 0x752046:
48 case 0x752048:
49 case 0x75204a:
50 case 0x75206b:
51 case 0x75206f:
52 case 0x752080:
53 case 0x752081:
54 case 0x752091:
55 case 0x755800:
56 return true;
57 default:
58 return false;
59 }
60}
61
62static bool rt711_volatile_register(struct device *dev, unsigned int reg)
63{
64 switch (reg) {
65 case 0x2016:
66 case 0x201b:
67 case 0x201c:
68 case 0x201d:
69 case 0x201f:
70 case 0x2021:
71 case 0x2023:
72 case 0x2230:
73 case 0x2012 ... 0x2015: /* HD-A read */
74 case 0x202d ... 0x202f: /* BRA */
75 case 0x2201 ... 0x2212: /* i2c debug */
76 case 0x2220 ... 0x2223: /* decoded HD-A */
77 case 0x9c00 ... 0x9cff:
78 case 0xb900 ... 0xb9ff:
79 case 0xff01:
80 case 0x75201a:
81 case 0x752046:
82 case 0x752080:
83 case 0x752081:
84 case 0x755800:
85 return true;
86 default:
87 return false;
88 }
89}
90
91static int rt711_sdw_read(void *context, unsigned int reg, unsigned int *val)
92{
93 struct device *dev = context;
94 struct rt711_priv *rt711 = dev_get_drvdata(dev);
95 unsigned int sdw_data_3, sdw_data_2, sdw_data_1, sdw_data_0;
96 unsigned int reg2 = 0, reg3 = 0, reg4 = 0, mask, nid, val2;
97 unsigned int is_hda_reg = 1, is_index_reg = 0;
98 int ret;
99
100 if (reg > 0xffff)
101 is_index_reg = 1;
102
103 mask = reg & 0xf000;
104
105 if (is_index_reg) { /* index registers */
106 val2 = reg & 0xff;
107 reg = reg >> 8;
108 nid = reg & 0xff;
109 ret = regmap_write(map: rt711->sdw_regmap, reg, val: 0);
110 if (ret < 0)
111 return ret;
112 reg2 = reg + 0x1000;
113 reg2 |= 0x80;
114 ret = regmap_write(map: rt711->sdw_regmap, reg: reg2, val: val2);
115 if (ret < 0)
116 return ret;
117
118 reg3 = RT711_PRIV_DATA_R_H | nid;
119 ret = regmap_write(map: rt711->sdw_regmap,
120 reg: reg3, val: ((*val >> 8) & 0xff));
121 if (ret < 0)
122 return ret;
123 reg4 = reg3 + 0x1000;
124 reg4 |= 0x80;
125 ret = regmap_write(map: rt711->sdw_regmap, reg: reg4, val: (*val & 0xff));
126 if (ret < 0)
127 return ret;
128 } else if (mask == 0x3000) {
129 reg += 0x8000;
130 ret = regmap_write(map: rt711->sdw_regmap, reg, val: *val);
131 if (ret < 0)
132 return ret;
133 } else if (mask == 0x7000) {
134 reg += 0x2000;
135 reg |= 0x800;
136 ret = regmap_write(map: rt711->sdw_regmap,
137 reg, val: ((*val >> 8) & 0xff));
138 if (ret < 0)
139 return ret;
140 reg2 = reg + 0x1000;
141 reg2 |= 0x80;
142 ret = regmap_write(map: rt711->sdw_regmap, reg: reg2, val: (*val & 0xff));
143 if (ret < 0)
144 return ret;
145 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */
146 reg2 = reg - 0x1000;
147 reg2 &= ~0x80;
148 ret = regmap_write(map: rt711->sdw_regmap,
149 reg: reg2, val: ((*val >> 8) & 0xff));
150 if (ret < 0)
151 return ret;
152 ret = regmap_write(map: rt711->sdw_regmap, reg, val: (*val & 0xff));
153 if (ret < 0)
154 return ret;
155 } else if (mask == 0x9000) {
156 ret = regmap_write(map: rt711->sdw_regmap,
157 reg, val: ((*val >> 8) & 0xff));
158 if (ret < 0)
159 return ret;
160 reg2 = reg + 0x1000;
161 reg2 |= 0x80;
162 ret = regmap_write(map: rt711->sdw_regmap, reg: reg2, val: (*val & 0xff));
163 if (ret < 0)
164 return ret;
165 } else if (mask == 0xb000) {
166 ret = regmap_write(map: rt711->sdw_regmap, reg, val: *val);
167 if (ret < 0)
168 return ret;
169 } else {
170 ret = regmap_read(map: rt711->sdw_regmap, reg, val);
171 if (ret < 0)
172 return ret;
173 is_hda_reg = 0;
174 }
175
176 if (is_hda_reg || is_index_reg) {
177 sdw_data_3 = 0;
178 sdw_data_2 = 0;
179 sdw_data_1 = 0;
180 sdw_data_0 = 0;
181 ret = regmap_read(map: rt711->sdw_regmap,
182 RT711_READ_HDA_3, val: &sdw_data_3);
183 if (ret < 0)
184 return ret;
185 ret = regmap_read(map: rt711->sdw_regmap,
186 RT711_READ_HDA_2, val: &sdw_data_2);
187 if (ret < 0)
188 return ret;
189 ret = regmap_read(map: rt711->sdw_regmap,
190 RT711_READ_HDA_1, val: &sdw_data_1);
191 if (ret < 0)
192 return ret;
193 ret = regmap_read(map: rt711->sdw_regmap,
194 RT711_READ_HDA_0, val: &sdw_data_0);
195 if (ret < 0)
196 return ret;
197 *val = ((sdw_data_3 & 0xff) << 24) |
198 ((sdw_data_2 & 0xff) << 16) |
199 ((sdw_data_1 & 0xff) << 8) | (sdw_data_0 & 0xff);
200 }
201
202 if (is_hda_reg == 0)
203 dev_dbg(dev, "[%s] %04x => %08x\n", __func__, reg, *val);
204 else if (is_index_reg)
205 dev_dbg(dev, "[%s] %04x %04x %04x %04x => %08x\n",
206 __func__, reg, reg2, reg3, reg4, *val);
207 else
208 dev_dbg(dev, "[%s] %04x %04x => %08x\n",
209 __func__, reg, reg2, *val);
210
211 return 0;
212}
213
214static int rt711_sdw_write(void *context, unsigned int reg, unsigned int val)
215{
216 struct device *dev = context;
217 struct rt711_priv *rt711 = dev_get_drvdata(dev);
218 unsigned int reg2 = 0, reg3, reg4, nid, mask, val2;
219 unsigned int is_index_reg = 0;
220 int ret;
221
222 if (reg > 0xffff)
223 is_index_reg = 1;
224
225 mask = reg & 0xf000;
226
227 if (is_index_reg) { /* index registers */
228 val2 = reg & 0xff;
229 reg = reg >> 8;
230 nid = reg & 0xff;
231 ret = regmap_write(map: rt711->sdw_regmap, reg, val: 0);
232 if (ret < 0)
233 return ret;
234 reg2 = reg + 0x1000;
235 reg2 |= 0x80;
236 ret = regmap_write(map: rt711->sdw_regmap, reg: reg2, val: val2);
237 if (ret < 0)
238 return ret;
239
240 reg3 = RT711_PRIV_DATA_W_H | nid;
241 ret = regmap_write(map: rt711->sdw_regmap,
242 reg: reg3, val: ((val >> 8) & 0xff));
243 if (ret < 0)
244 return ret;
245 reg4 = reg3 + 0x1000;
246 reg4 |= 0x80;
247 ret = regmap_write(map: rt711->sdw_regmap, reg: reg4, val: (val & 0xff));
248 if (ret < 0)
249 return ret;
250 is_index_reg = 1;
251 } else if (reg < 0x4fff) {
252 ret = regmap_write(map: rt711->sdw_regmap, reg, val);
253 if (ret < 0)
254 return ret;
255 } else if (reg == RT711_FUNC_RESET) {
256 ret = regmap_write(map: rt711->sdw_regmap, reg, val);
257 if (ret < 0)
258 return ret;
259 } else if (mask == 0x7000) {
260 ret = regmap_write(map: rt711->sdw_regmap,
261 reg, val: ((val >> 8) & 0xff));
262 if (ret < 0)
263 return ret;
264 reg2 = reg + 0x1000;
265 reg2 |= 0x80;
266 ret = regmap_write(map: rt711->sdw_regmap, reg: reg2, val: (val & 0xff));
267 if (ret < 0)
268 return ret;
269 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */
270 reg2 = reg - 0x1000;
271 reg2 &= ~0x80;
272 ret = regmap_write(map: rt711->sdw_regmap,
273 reg: reg2, val: ((val >> 8) & 0xff));
274 if (ret < 0)
275 return ret;
276 ret = regmap_write(map: rt711->sdw_regmap, reg, val: (val & 0xff));
277 if (ret < 0)
278 return ret;
279 }
280
281 if (reg2 == 0)
282 dev_dbg(dev, "[%s] %04x <= %04x\n", __func__, reg, val);
283 else if (is_index_reg)
284 dev_dbg(dev, "[%s] %04x %04x %04x %04x <= %04x %04x\n",
285 __func__, reg, reg2, reg3, reg4, val2, val);
286 else
287 dev_dbg(dev, "[%s] %04x %04x <= %04x\n",
288 __func__, reg, reg2, val);
289
290 return 0;
291}
292
293static const struct regmap_config rt711_regmap = {
294 .reg_bits = 24,
295 .val_bits = 32,
296 .readable_reg = rt711_readable_register,
297 .volatile_reg = rt711_volatile_register,
298 .max_register = 0x755800,
299 .reg_defaults = rt711_reg_defaults,
300 .num_reg_defaults = ARRAY_SIZE(rt711_reg_defaults),
301 .cache_type = REGCACHE_MAPLE,
302 .use_single_read = true,
303 .use_single_write = true,
304 .reg_read = rt711_sdw_read,
305 .reg_write = rt711_sdw_write,
306};
307
308static const struct regmap_config rt711_sdw_regmap = {
309 .name = "sdw",
310 .reg_bits = 32,
311 .val_bits = 8,
312 .readable_reg = rt711_readable_register,
313 .max_register = 0xff01,
314 .cache_type = REGCACHE_NONE,
315 .use_single_read = true,
316 .use_single_write = true,
317};
318
319static int rt711_update_status(struct sdw_slave *slave,
320 enum sdw_slave_status status)
321{
322 struct rt711_priv *rt711 = dev_get_drvdata(dev: &slave->dev);
323
324 if (status == SDW_SLAVE_UNATTACHED)
325 rt711->hw_init = false;
326
327 /*
328 * Perform initialization only if slave status is present and
329 * hw_init flag is false
330 */
331 if (rt711->hw_init || status != SDW_SLAVE_ATTACHED)
332 return 0;
333
334 /* perform I/O transfers required for Slave initialization */
335 return rt711_io_init(dev: &slave->dev, slave);
336}
337
338static int rt711_read_prop(struct sdw_slave *slave)
339{
340 struct sdw_slave_prop *prop = &slave->prop;
341 int nval;
342 int i, j;
343 u32 bit;
344 unsigned long addr;
345 struct sdw_dpn_prop *dpn;
346
347 prop->scp_int1_mask = SDW_SCP_INT1_IMPL_DEF | SDW_SCP_INT1_BUS_CLASH |
348 SDW_SCP_INT1_PARITY;
349 prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;
350
351 prop->paging_support = false;
352
353 /* first we need to allocate memory for set bits in port lists */
354 prop->source_ports = 0x14; /* BITMAP: 00010100 */
355 prop->sink_ports = 0x8; /* BITMAP: 00001000 */
356
357 nval = hweight32(prop->source_ports);
358 prop->src_dpn_prop = devm_kcalloc(dev: &slave->dev, n: nval,
359 size: sizeof(*prop->src_dpn_prop),
360 GFP_KERNEL);
361 if (!prop->src_dpn_prop)
362 return -ENOMEM;
363
364 i = 0;
365 dpn = prop->src_dpn_prop;
366 addr = prop->source_ports;
367 for_each_set_bit(bit, &addr, 32) {
368 dpn[i].num = bit;
369 dpn[i].type = SDW_DPN_FULL;
370 dpn[i].simple_ch_prep_sm = true;
371 dpn[i].ch_prep_timeout = 10;
372 i++;
373 }
374
375 /* do this again for sink now */
376 nval = hweight32(prop->sink_ports);
377 prop->sink_dpn_prop = devm_kcalloc(dev: &slave->dev, n: nval,
378 size: sizeof(*prop->sink_dpn_prop),
379 GFP_KERNEL);
380 if (!prop->sink_dpn_prop)
381 return -ENOMEM;
382
383 j = 0;
384 dpn = prop->sink_dpn_prop;
385 addr = prop->sink_ports;
386 for_each_set_bit(bit, &addr, 32) {
387 dpn[j].num = bit;
388 dpn[j].type = SDW_DPN_FULL;
389 dpn[j].simple_ch_prep_sm = true;
390 dpn[j].ch_prep_timeout = 10;
391 j++;
392 }
393
394 /* set the timeout values */
395 prop->clk_stop_timeout = 20;
396
397 /* wake-up event */
398 prop->wake_capable = 1;
399
400 return 0;
401}
402
403static int rt711_bus_config(struct sdw_slave *slave,
404 struct sdw_bus_params *params)
405{
406 struct rt711_priv *rt711 = dev_get_drvdata(dev: &slave->dev);
407 int ret;
408
409 memcpy(&rt711->params, params, sizeof(*params));
410
411 ret = rt711_clock_config(dev: &slave->dev);
412 if (ret < 0)
413 dev_err(&slave->dev, "%s: Invalid clk config", __func__);
414
415 return ret;
416}
417
418static int rt711_interrupt_callback(struct sdw_slave *slave,
419 struct sdw_slave_intr_status *status)
420{
421 struct rt711_priv *rt711 = dev_get_drvdata(dev: &slave->dev);
422
423 dev_dbg(&slave->dev,
424 "%s control_port_stat=%x", __func__, status->control_port);
425
426 mutex_lock(&rt711->disable_irq_lock);
427 if (status->control_port & 0x4 && !rt711->disable_irq) {
428 mod_delayed_work(wq: system_power_efficient_wq,
429 dwork: &rt711->jack_detect_work, delay: msecs_to_jiffies(m: 250));
430 }
431 mutex_unlock(lock: &rt711->disable_irq_lock);
432
433 return 0;
434}
435
436static const struct sdw_slave_ops rt711_slave_ops = {
437 .read_prop = rt711_read_prop,
438 .interrupt_callback = rt711_interrupt_callback,
439 .update_status = rt711_update_status,
440 .bus_config = rt711_bus_config,
441};
442
443static int rt711_sdw_probe(struct sdw_slave *slave,
444 const struct sdw_device_id *id)
445{
446 struct regmap *sdw_regmap, *regmap;
447
448 /* Regmap Initialization */
449 sdw_regmap = devm_regmap_init_sdw(slave, &rt711_sdw_regmap);
450 if (IS_ERR(ptr: sdw_regmap))
451 return PTR_ERR(ptr: sdw_regmap);
452
453 regmap = devm_regmap_init(&slave->dev, NULL,
454 &slave->dev, &rt711_regmap);
455 if (IS_ERR(ptr: regmap))
456 return PTR_ERR(ptr: regmap);
457
458 return rt711_init(dev: &slave->dev, sdw_regmap, regmap, slave);
459}
460
461static int rt711_sdw_remove(struct sdw_slave *slave)
462{
463 struct rt711_priv *rt711 = dev_get_drvdata(dev: &slave->dev);
464
465 if (rt711->hw_init) {
466 cancel_delayed_work_sync(dwork: &rt711->jack_detect_work);
467 cancel_delayed_work_sync(dwork: &rt711->jack_btn_check_work);
468 cancel_work_sync(work: &rt711->calibration_work);
469 }
470
471 pm_runtime_disable(dev: &slave->dev);
472
473 mutex_destroy(lock: &rt711->calibrate_mutex);
474 mutex_destroy(lock: &rt711->disable_irq_lock);
475
476 return 0;
477}
478
479static const struct sdw_device_id rt711_id[] = {
480 SDW_SLAVE_ENTRY_EXT(0x025d, 0x711, 0x2, 0, 0),
481 {},
482};
483MODULE_DEVICE_TABLE(sdw, rt711_id);
484
485static int rt711_dev_suspend(struct device *dev)
486{
487 struct rt711_priv *rt711 = dev_get_drvdata(dev);
488
489 if (!rt711->hw_init)
490 return 0;
491
492 cancel_delayed_work_sync(dwork: &rt711->jack_detect_work);
493 cancel_delayed_work_sync(dwork: &rt711->jack_btn_check_work);
494 cancel_work_sync(work: &rt711->calibration_work);
495
496 regcache_cache_only(map: rt711->regmap, enable: true);
497
498 return 0;
499}
500
501static int rt711_dev_system_suspend(struct device *dev)
502{
503 struct rt711_priv *rt711 = dev_get_drvdata(dev);
504 struct sdw_slave *slave = dev_to_sdw_dev(dev);
505 int ret;
506
507 if (!rt711->hw_init)
508 return 0;
509
510 /*
511 * prevent new interrupts from being handled after the
512 * deferred work completes and before the parent disables
513 * interrupts on the link
514 */
515 mutex_lock(&rt711->disable_irq_lock);
516 rt711->disable_irq = true;
517 ret = sdw_update_no_pm(slave, SDW_SCP_INTMASK1,
518 SDW_SCP_INT1_IMPL_DEF, val: 0);
519 mutex_unlock(lock: &rt711->disable_irq_lock);
520
521 if (ret < 0) {
522 /* log but don't prevent suspend from happening */
523 dev_dbg(&slave->dev, "%s: could not disable imp-def interrupts\n:", __func__);
524 }
525
526 return rt711_dev_suspend(dev);
527}
528
529#define RT711_PROBE_TIMEOUT 5000
530
531static int rt711_dev_resume(struct device *dev)
532{
533 struct sdw_slave *slave = dev_to_sdw_dev(dev);
534 struct rt711_priv *rt711 = dev_get_drvdata(dev);
535 unsigned long time;
536
537 if (!rt711->first_hw_init)
538 return 0;
539
540 if (!slave->unattach_request) {
541 mutex_lock(&rt711->disable_irq_lock);
542 if (rt711->disable_irq == true) {
543 sdw_write_no_pm(slave, SDW_SCP_INTMASK1, SDW_SCP_INT1_IMPL_DEF);
544 rt711->disable_irq = false;
545 }
546 mutex_unlock(lock: &rt711->disable_irq_lock);
547 goto regmap_sync;
548 }
549
550 time = wait_for_completion_timeout(x: &slave->initialization_complete,
551 timeout: msecs_to_jiffies(RT711_PROBE_TIMEOUT));
552 if (!time) {
553 dev_err(&slave->dev, "%s: Initialization not complete, timed out\n", __func__);
554 return -ETIMEDOUT;
555 }
556
557regmap_sync:
558 slave->unattach_request = 0;
559 regcache_cache_only(map: rt711->regmap, enable: false);
560 regcache_sync_region(map: rt711->regmap, min: 0x3000, max: 0x8fff);
561 regcache_sync_region(map: rt711->regmap, min: 0x752009, max: 0x752091);
562
563 return 0;
564}
565
566static const struct dev_pm_ops rt711_pm = {
567 SYSTEM_SLEEP_PM_OPS(rt711_dev_system_suspend, rt711_dev_resume)
568 RUNTIME_PM_OPS(rt711_dev_suspend, rt711_dev_resume, NULL)
569};
570
571static struct sdw_driver rt711_sdw_driver = {
572 .driver = {
573 .name = "rt711",
574 .pm = pm_ptr(&rt711_pm),
575 },
576 .probe = rt711_sdw_probe,
577 .remove = rt711_sdw_remove,
578 .ops = &rt711_slave_ops,
579 .id_table = rt711_id,
580};
581module_sdw_driver(rt711_sdw_driver);
582
583MODULE_DESCRIPTION("ASoC RT711 SDW driver");
584MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>");
585MODULE_LICENSE("GPL");
586

source code of linux/sound/soc/codecs/rt711-sdw.c