1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // rt700-sdw.c -- rt700 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 "rt700.h"
20 #include "rt700-sdw.h"
21
rt700_readable_register(struct device * dev,unsigned int reg)22 static bool rt700_readable_register(struct device *dev, unsigned int reg)
23 {
24 switch (reg) {
25 case 0x00e0:
26 case 0x00f0:
27 case 0x2000 ... 0x200e:
28 case 0x2012 ... 0x2016:
29 case 0x201a ... 0x2027:
30 case 0x2029 ... 0x202a:
31 case 0x202d ... 0x2034:
32 case 0x2200 ... 0x2204:
33 case 0x2206 ... 0x2212:
34 case 0x2220 ... 0x2223:
35 case 0x2230 ... 0x2231:
36 case 0x3000 ... 0x3fff:
37 case 0x7000 ... 0x7fff:
38 case 0x8300 ... 0x83ff:
39 case 0x9c00 ... 0x9cff:
40 case 0xb900 ... 0xb9ff:
41 case 0x75201a:
42 case 0x752045:
43 case 0x752046:
44 case 0x752048:
45 case 0x75204a:
46 case 0x75206b:
47 case 0x752080:
48 case 0x752081:
49 return true;
50 default:
51 return false;
52 }
53 }
54
rt700_volatile_register(struct device * dev,unsigned int reg)55 static bool rt700_volatile_register(struct device *dev, unsigned int reg)
56 {
57 switch (reg) {
58 case 0x2009:
59 case 0x2016:
60 case 0x201b:
61 case 0x201c:
62 case 0x201d:
63 case 0x201f:
64 case 0x2021:
65 case 0x2023:
66 case 0x2230:
67 case 0x200b ... 0x200e: /* i2c read */
68 case 0x2012 ... 0x2015: /* HD-A read */
69 case 0x202d ... 0x202f: /* BRA */
70 case 0x2201 ... 0x2212: /* i2c debug */
71 case 0x2220 ... 0x2223: /* decoded HD-A */
72 case 0x9c00 ... 0x9cff:
73 case 0xb900 ... 0xb9ff:
74 case 0xff01:
75 case 0x75201a:
76 case 0x752046:
77 case 0x752080:
78 case 0x752081:
79 return true;
80 default:
81 return false;
82 }
83 }
84
rt700_sdw_read(void * context,unsigned int reg,unsigned int * val)85 static int rt700_sdw_read(void *context, unsigned int reg, unsigned int *val)
86 {
87 struct device *dev = context;
88 struct rt700_priv *rt700 = dev_get_drvdata(dev);
89 unsigned int sdw_data_3, sdw_data_2, sdw_data_1, sdw_data_0;
90 unsigned int reg2 = 0, reg3 = 0, reg4 = 0, mask, nid, val2;
91 unsigned int is_hda_reg = 1, is_index_reg = 0;
92 int ret;
93
94 if (reg > 0xffff)
95 is_index_reg = 1;
96
97 mask = reg & 0xf000;
98
99 if (is_index_reg) { /* index registers */
100 val2 = reg & 0xff;
101 reg = reg >> 8;
102 nid = reg & 0xff;
103 ret = regmap_write(rt700->sdw_regmap, reg, 0);
104 if (ret < 0)
105 return ret;
106 reg2 = reg + 0x1000;
107 reg2 |= 0x80;
108 ret = regmap_write(rt700->sdw_regmap, reg2, val2);
109 if (ret < 0)
110 return ret;
111
112 reg3 = RT700_PRIV_DATA_R_H | nid;
113 ret = regmap_write(rt700->sdw_regmap,
114 reg3, ((*val >> 8) & 0xff));
115 if (ret < 0)
116 return ret;
117 reg4 = reg3 + 0x1000;
118 reg4 |= 0x80;
119 ret = regmap_write(rt700->sdw_regmap, reg4, (*val & 0xff));
120 if (ret < 0)
121 return ret;
122 } else if (mask == 0x3000) {
123 reg += 0x8000;
124 ret = regmap_write(rt700->sdw_regmap, reg, *val);
125 if (ret < 0)
126 return ret;
127 } else if (mask == 0x7000) {
128 reg += 0x2000;
129 reg |= 0x800;
130 ret = regmap_write(rt700->sdw_regmap,
131 reg, ((*val >> 8) & 0xff));
132 if (ret < 0)
133 return ret;
134 reg2 = reg + 0x1000;
135 reg2 |= 0x80;
136 ret = regmap_write(rt700->sdw_regmap, reg2, (*val & 0xff));
137 if (ret < 0)
138 return ret;
139 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */
140 reg2 = reg - 0x1000;
141 reg2 &= ~0x80;
142 ret = regmap_write(rt700->sdw_regmap,
143 reg2, ((*val >> 8) & 0xff));
144 if (ret < 0)
145 return ret;
146 ret = regmap_write(rt700->sdw_regmap, reg, (*val & 0xff));
147 if (ret < 0)
148 return ret;
149 } else if (mask == 0x9000) {
150 ret = regmap_write(rt700->sdw_regmap,
151 reg, ((*val >> 8) & 0xff));
152 if (ret < 0)
153 return ret;
154 reg2 = reg + 0x1000;
155 reg2 |= 0x80;
156 ret = regmap_write(rt700->sdw_regmap, reg2, (*val & 0xff));
157 if (ret < 0)
158 return ret;
159 } else if (mask == 0xb000) {
160 ret = regmap_write(rt700->sdw_regmap, reg, *val);
161 if (ret < 0)
162 return ret;
163 } else {
164 ret = regmap_read(rt700->sdw_regmap, reg, val);
165 if (ret < 0)
166 return ret;
167 is_hda_reg = 0;
168 }
169
170 if (is_hda_reg || is_index_reg) {
171 sdw_data_3 = 0;
172 sdw_data_2 = 0;
173 sdw_data_1 = 0;
174 sdw_data_0 = 0;
175 ret = regmap_read(rt700->sdw_regmap,
176 RT700_READ_HDA_3, &sdw_data_3);
177 if (ret < 0)
178 return ret;
179 ret = regmap_read(rt700->sdw_regmap,
180 RT700_READ_HDA_2, &sdw_data_2);
181 if (ret < 0)
182 return ret;
183 ret = regmap_read(rt700->sdw_regmap,
184 RT700_READ_HDA_1, &sdw_data_1);
185 if (ret < 0)
186 return ret;
187 ret = regmap_read(rt700->sdw_regmap,
188 RT700_READ_HDA_0, &sdw_data_0);
189 if (ret < 0)
190 return ret;
191 *val = ((sdw_data_3 & 0xff) << 24) |
192 ((sdw_data_2 & 0xff) << 16) |
193 ((sdw_data_1 & 0xff) << 8) | (sdw_data_0 & 0xff);
194 }
195
196 if (is_hda_reg == 0)
197 dev_dbg(dev, "[%s] %04x => %08x\n", __func__, reg, *val);
198 else if (is_index_reg)
199 dev_dbg(dev, "[%s] %04x %04x %04x %04x => %08x\n",
200 __func__, reg, reg2, reg3, reg4, *val);
201 else
202 dev_dbg(dev, "[%s] %04x %04x => %08x\n",
203 __func__, reg, reg2, *val);
204
205 return 0;
206 }
207
rt700_sdw_write(void * context,unsigned int reg,unsigned int val)208 static int rt700_sdw_write(void *context, unsigned int reg, unsigned int val)
209 {
210 struct device *dev = context;
211 struct rt700_priv *rt700 = dev_get_drvdata(dev);
212 unsigned int reg2 = 0, reg3, reg4, nid, mask, val2;
213 unsigned int is_index_reg = 0;
214 int ret;
215
216 if (reg > 0xffff)
217 is_index_reg = 1;
218
219 mask = reg & 0xf000;
220
221 if (is_index_reg) { /* index registers */
222 val2 = reg & 0xff;
223 reg = reg >> 8;
224 nid = reg & 0xff;
225 ret = regmap_write(rt700->sdw_regmap, reg, 0);
226 if (ret < 0)
227 return ret;
228 reg2 = reg + 0x1000;
229 reg2 |= 0x80;
230 ret = regmap_write(rt700->sdw_regmap, reg2, val2);
231 if (ret < 0)
232 return ret;
233
234 reg3 = RT700_PRIV_DATA_W_H | nid;
235 ret = regmap_write(rt700->sdw_regmap,
236 reg3, ((val >> 8) & 0xff));
237 if (ret < 0)
238 return ret;
239 reg4 = reg3 + 0x1000;
240 reg4 |= 0x80;
241 ret = regmap_write(rt700->sdw_regmap, reg4, (val & 0xff));
242 if (ret < 0)
243 return ret;
244 is_index_reg = 1;
245 } else if (reg < 0x4fff) {
246 ret = regmap_write(rt700->sdw_regmap, reg, val);
247 if (ret < 0)
248 return ret;
249 } else if (reg == 0xff01) {
250 ret = regmap_write(rt700->sdw_regmap, reg, val);
251 if (ret < 0)
252 return ret;
253 } else if (mask == 0x7000) {
254 ret = regmap_write(rt700->sdw_regmap,
255 reg, ((val >> 8) & 0xff));
256 if (ret < 0)
257 return ret;
258 reg2 = reg + 0x1000;
259 reg2 |= 0x80;
260 ret = regmap_write(rt700->sdw_regmap, reg2, (val & 0xff));
261 if (ret < 0)
262 return ret;
263 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */
264 reg2 = reg - 0x1000;
265 reg2 &= ~0x80;
266 ret = regmap_write(rt700->sdw_regmap,
267 reg2, ((val >> 8) & 0xff));
268 if (ret < 0)
269 return ret;
270 ret = regmap_write(rt700->sdw_regmap, reg, (val & 0xff));
271 if (ret < 0)
272 return ret;
273 }
274
275 if (reg2 == 0)
276 dev_dbg(dev, "[%s] %04x <= %04x\n", __func__, reg, val);
277 else if (is_index_reg)
278 dev_dbg(dev, "[%s] %04x %04x %04x %04x <= %04x %04x\n",
279 __func__, reg, reg2, reg3, reg4, val2, val);
280 else
281 dev_dbg(dev, "[%s] %04x %04x <= %04x\n",
282 __func__, reg, reg2, val);
283
284 return 0;
285 }
286
287 static const struct regmap_config rt700_regmap = {
288 .reg_bits = 24,
289 .val_bits = 32,
290 .readable_reg = rt700_readable_register,
291 .volatile_reg = rt700_volatile_register,
292 .max_register = 0x755800,
293 .reg_defaults = rt700_reg_defaults,
294 .num_reg_defaults = ARRAY_SIZE(rt700_reg_defaults),
295 .cache_type = REGCACHE_RBTREE,
296 .use_single_read = true,
297 .use_single_write = true,
298 .reg_read = rt700_sdw_read,
299 .reg_write = rt700_sdw_write,
300 };
301
302 static const struct regmap_config rt700_sdw_regmap = {
303 .name = "sdw",
304 .reg_bits = 32,
305 .val_bits = 8,
306 .readable_reg = rt700_readable_register,
307 .max_register = 0xff01,
308 .cache_type = REGCACHE_NONE,
309 .use_single_read = true,
310 .use_single_write = true,
311 };
312
rt700_update_status(struct sdw_slave * slave,enum sdw_slave_status status)313 static int rt700_update_status(struct sdw_slave *slave,
314 enum sdw_slave_status status)
315 {
316 struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev);
317
318 /* Update the status */
319 rt700->status = status;
320
321 if (status == SDW_SLAVE_UNATTACHED)
322 rt700->hw_init = false;
323
324 /*
325 * Perform initialization only if slave status is present and
326 * hw_init flag is false
327 */
328 if (rt700->hw_init || rt700->status != SDW_SLAVE_ATTACHED)
329 return 0;
330
331 /* perform I/O transfers required for Slave initialization */
332 return rt700_io_init(&slave->dev, slave);
333 }
334
rt700_read_prop(struct sdw_slave * slave)335 static int rt700_read_prop(struct sdw_slave *slave)
336 {
337 struct sdw_slave_prop *prop = &slave->prop;
338 int nval, i;
339 u32 bit;
340 unsigned long addr;
341 struct sdw_dpn_prop *dpn;
342
343 prop->scp_int1_mask = SDW_SCP_INT1_IMPL_DEF | SDW_SCP_INT1_BUS_CLASH |
344 SDW_SCP_INT1_PARITY;
345 prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;
346
347 prop->paging_support = false;
348
349 /* first we need to allocate memory for set bits in port lists */
350 prop->source_ports = 0x14; /* BITMAP: 00010100 */
351 prop->sink_ports = 0xA; /* BITMAP: 00001010 */
352
353 nval = hweight32(prop->source_ports);
354 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
355 sizeof(*prop->src_dpn_prop),
356 GFP_KERNEL);
357 if (!prop->src_dpn_prop)
358 return -ENOMEM;
359
360 i = 0;
361 dpn = prop->src_dpn_prop;
362 addr = prop->source_ports;
363 for_each_set_bit(bit, &addr, 32) {
364 dpn[i].num = bit;
365 dpn[i].type = SDW_DPN_FULL;
366 dpn[i].simple_ch_prep_sm = true;
367 dpn[i].ch_prep_timeout = 10;
368 i++;
369 }
370
371 /* do this again for sink now */
372 nval = hweight32(prop->sink_ports);
373 prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
374 sizeof(*prop->sink_dpn_prop),
375 GFP_KERNEL);
376 if (!prop->sink_dpn_prop)
377 return -ENOMEM;
378
379 i = 0;
380 dpn = prop->sink_dpn_prop;
381 addr = prop->sink_ports;
382 for_each_set_bit(bit, &addr, 32) {
383 dpn[i].num = bit;
384 dpn[i].type = SDW_DPN_FULL;
385 dpn[i].simple_ch_prep_sm = true;
386 dpn[i].ch_prep_timeout = 10;
387 i++;
388 }
389
390 /* set the timeout values */
391 prop->clk_stop_timeout = 20;
392
393 /* wake-up event */
394 prop->wake_capable = 1;
395
396 return 0;
397 }
398
rt700_bus_config(struct sdw_slave * slave,struct sdw_bus_params * params)399 static int rt700_bus_config(struct sdw_slave *slave,
400 struct sdw_bus_params *params)
401 {
402 struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev);
403 int ret;
404
405 memcpy(&rt700->params, params, sizeof(*params));
406
407 ret = rt700_clock_config(&slave->dev);
408 if (ret < 0)
409 dev_err(&slave->dev, "Invalid clk config");
410
411 return ret;
412 }
413
rt700_interrupt_callback(struct sdw_slave * slave,struct sdw_slave_intr_status * status)414 static int rt700_interrupt_callback(struct sdw_slave *slave,
415 struct sdw_slave_intr_status *status)
416 {
417 struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev);
418
419 dev_dbg(&slave->dev,
420 "%s control_port_stat=%x", __func__, status->control_port);
421
422 mutex_lock(&rt700->disable_irq_lock);
423 if (status->control_port & 0x4 && !rt700->disable_irq) {
424 mod_delayed_work(system_power_efficient_wq,
425 &rt700->jack_detect_work, msecs_to_jiffies(250));
426 }
427 mutex_unlock(&rt700->disable_irq_lock);
428
429 return 0;
430 }
431
432 /*
433 * slave_ops: callbacks for get_clock_stop_mode, clock_stop and
434 * port_prep are not defined for now
435 */
436 static const struct sdw_slave_ops rt700_slave_ops = {
437 .read_prop = rt700_read_prop,
438 .interrupt_callback = rt700_interrupt_callback,
439 .update_status = rt700_update_status,
440 .bus_config = rt700_bus_config,
441 };
442
rt700_sdw_probe(struct sdw_slave * slave,const struct sdw_device_id * id)443 static int rt700_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, &rt700_sdw_regmap);
450 if (IS_ERR(sdw_regmap))
451 return PTR_ERR(sdw_regmap);
452
453 regmap = devm_regmap_init(&slave->dev, NULL,
454 &slave->dev, &rt700_regmap);
455 if (IS_ERR(regmap))
456 return PTR_ERR(regmap);
457
458 rt700_init(&slave->dev, sdw_regmap, regmap, slave);
459
460 return 0;
461 }
462
rt700_sdw_remove(struct sdw_slave * slave)463 static int rt700_sdw_remove(struct sdw_slave *slave)
464 {
465 struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev);
466
467 if (rt700->hw_init) {
468 cancel_delayed_work_sync(&rt700->jack_detect_work);
469 cancel_delayed_work_sync(&rt700->jack_btn_check_work);
470 }
471
472 if (rt700->first_hw_init)
473 pm_runtime_disable(&slave->dev);
474
475 return 0;
476 }
477
478 static const struct sdw_device_id rt700_id[] = {
479 SDW_SLAVE_ENTRY_EXT(0x025d, 0x700, 0x1, 0, 0),
480 {},
481 };
482 MODULE_DEVICE_TABLE(sdw, rt700_id);
483
rt700_dev_suspend(struct device * dev)484 static int __maybe_unused rt700_dev_suspend(struct device *dev)
485 {
486 struct rt700_priv *rt700 = dev_get_drvdata(dev);
487
488 if (!rt700->hw_init)
489 return 0;
490
491 cancel_delayed_work_sync(&rt700->jack_detect_work);
492 cancel_delayed_work_sync(&rt700->jack_btn_check_work);
493
494 regcache_cache_only(rt700->regmap, true);
495
496 return 0;
497 }
498
rt700_dev_system_suspend(struct device * dev)499 static int __maybe_unused rt700_dev_system_suspend(struct device *dev)
500 {
501 struct sdw_slave *slave = dev_to_sdw_dev(dev);
502 struct rt700_priv *rt700 = dev_get_drvdata(dev);
503 int ret;
504
505 if (!rt700->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(&rt700->disable_irq_lock);
514 rt700->disable_irq = true;
515 ret = sdw_update_no_pm(slave, SDW_SCP_INTMASK1,
516 SDW_SCP_INT1_IMPL_DEF, 0);
517 mutex_unlock(&rt700->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 rt700_dev_suspend(dev);
525 }
526
527 #define RT700_PROBE_TIMEOUT 5000
528
rt700_dev_resume(struct device * dev)529 static int __maybe_unused rt700_dev_resume(struct device *dev)
530 {
531 struct sdw_slave *slave = dev_to_sdw_dev(dev);
532 struct rt700_priv *rt700 = dev_get_drvdata(dev);
533 unsigned long time;
534
535 if (!rt700->first_hw_init)
536 return 0;
537
538 if (!slave->unattach_request)
539 goto regmap_sync;
540
541 time = wait_for_completion_timeout(&slave->initialization_complete,
542 msecs_to_jiffies(RT700_PROBE_TIMEOUT));
543 if (!time) {
544 dev_err(&slave->dev, "Initialization not complete, timed out\n");
545 sdw_show_ping_status(slave->bus, true);
546
547 return -ETIMEDOUT;
548 }
549
550 regmap_sync:
551 slave->unattach_request = 0;
552 regcache_cache_only(rt700->regmap, false);
553 regcache_sync_region(rt700->regmap, 0x3000, 0x8fff);
554 regcache_sync_region(rt700->regmap, 0x752010, 0x75206b);
555
556 return 0;
557 }
558
559 static const struct dev_pm_ops rt700_pm = {
560 SET_SYSTEM_SLEEP_PM_OPS(rt700_dev_system_suspend, rt700_dev_resume)
561 SET_RUNTIME_PM_OPS(rt700_dev_suspend, rt700_dev_resume, NULL)
562 };
563
564 static struct sdw_driver rt700_sdw_driver = {
565 .driver = {
566 .name = "rt700",
567 .owner = THIS_MODULE,
568 .pm = &rt700_pm,
569 },
570 .probe = rt700_sdw_probe,
571 .remove = rt700_sdw_remove,
572 .ops = &rt700_slave_ops,
573 .id_table = rt700_id,
574 };
575 module_sdw_driver(rt700_sdw_driver);
576
577 MODULE_DESCRIPTION("ASoC RT700 driver SDW");
578 MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>");
579 MODULE_LICENSE("GPL v2");
580
