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