1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * rt715-sdw.c -- rt715 ALSA SoC audio driver
4 *
5 * Copyright(c) 2019 Realtek Semiconductor Corp.
6 *
7 * ALC715 ASoC Codec Driver based Intel Dummy SdW codec driver
8 *
9 */
10 #include <linux/delay.h>
11 #include <linux/device.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/of.h>
18 #include <linux/regmap.h>
19 #include <sound/soc.h>
20 #include "rt715.h"
21 #include "rt715-sdw.h"
22
rt715_readable_register(struct device * dev,unsigned int reg)23 static bool rt715_readable_register(struct device *dev, unsigned int reg)
24 {
25 switch (reg) {
26 case 0x00e0 ... 0x00e5:
27 case 0x00ee ... 0x00ef:
28 case 0x00f0 ... 0x00f5:
29 case 0x00fe ... 0x00ff:
30 case 0x02e0:
31 case 0x02f0:
32 case 0x04e0:
33 case 0x04f0:
34 case 0x06e0:
35 case 0x06f0:
36 case 0x2000 ... 0x2016:
37 case 0x201a ... 0x2027:
38 case 0x2029 ... 0x202a:
39 case 0x202d ... 0x2034:
40 case 0x2200 ... 0x2204:
41 case 0x2206 ... 0x2212:
42 case 0x2220 ... 0x2223:
43 case 0x2230 ... 0x2239:
44 case 0x22f0 ... 0x22f3:
45 case 0x3122:
46 case 0x3123:
47 case 0x3124:
48 case 0x3125:
49 case 0x3607:
50 case 0x3608:
51 case 0x3609:
52 case 0x3610:
53 case 0x3611:
54 case 0x3627:
55 case 0x3712:
56 case 0x3713:
57 case 0x3718:
58 case 0x3719:
59 case 0x371a:
60 case 0x371b:
61 case 0x371d:
62 case 0x3729:
63 case 0x385e:
64 case 0x3859:
65 case 0x4c12:
66 case 0x4c13:
67 case 0x4c1d:
68 case 0x4c29:
69 case 0x4d12:
70 case 0x4d13:
71 case 0x4d1d:
72 case 0x4d29:
73 case 0x4e12:
74 case 0x4e13:
75 case 0x4e1d:
76 case 0x4e29:
77 case 0x4f12:
78 case 0x4f13:
79 case 0x4f1d:
80 case 0x4f29:
81 case 0x7207:
82 case 0x7208:
83 case 0x7209:
84 case 0x7227:
85 case 0x7307:
86 case 0x7308:
87 case 0x7309:
88 case 0x7312:
89 case 0x7313:
90 case 0x7318:
91 case 0x7319:
92 case 0x731a:
93 case 0x731b:
94 case 0x731d:
95 case 0x7327:
96 case 0x7329:
97 case 0x8287:
98 case 0x8288:
99 case 0x8289:
100 case 0x82a7:
101 case 0x8387:
102 case 0x8388:
103 case 0x8389:
104 case 0x8392:
105 case 0x8393:
106 case 0x8398:
107 case 0x8399:
108 case 0x839a:
109 case 0x839b:
110 case 0x839d:
111 case 0x83a7:
112 case 0x83a9:
113 case 0x752001:
114 case 0x752039:
115 return true;
116 default:
117 return false;
118 }
119 }
120
rt715_volatile_register(struct device * dev,unsigned int reg)121 static bool rt715_volatile_register(struct device *dev, unsigned int reg)
122 {
123 switch (reg) {
124 case 0x00e5:
125 case 0x00f0:
126 case 0x00f3:
127 case 0x00f5:
128 case 0x2009:
129 case 0x2016:
130 case 0x201b:
131 case 0x201c:
132 case 0x201d:
133 case 0x201f:
134 case 0x2023:
135 case 0x2230:
136 case 0x200b ... 0x200e: /* i2c read */
137 case 0x2012 ... 0x2015: /* HD-A read */
138 case 0x202d ... 0x202f: /* BRA */
139 case 0x2201 ... 0x2212: /* i2c debug */
140 case 0x2220 ... 0x2223: /* decoded HD-A */
141 return true;
142 default:
143 return false;
144 }
145 }
146
rt715_sdw_read(void * context,unsigned int reg,unsigned int * val)147 static int rt715_sdw_read(void *context, unsigned int reg, unsigned int *val)
148 {
149 struct device *dev = context;
150 struct rt715_priv *rt715 = dev_get_drvdata(dev);
151 unsigned int sdw_data_3, sdw_data_2, sdw_data_1, sdw_data_0;
152 unsigned int reg2 = 0, reg3 = 0, reg4 = 0, mask, nid, val2;
153 unsigned int is_hda_reg = 1, is_index_reg = 0;
154 int ret;
155
156 if (reg > 0xffff)
157 is_index_reg = 1;
158
159 mask = reg & 0xf000;
160
161 if (is_index_reg) { /* index registers */
162 val2 = reg & 0xff;
163 reg = reg >> 8;
164 nid = reg & 0xff;
165 ret = regmap_write(rt715->sdw_regmap, reg, 0);
166 if (ret < 0)
167 return ret;
168 reg2 = reg + 0x1000;
169 reg2 |= 0x80;
170 ret = regmap_write(rt715->sdw_regmap, reg2, val2);
171 if (ret < 0)
172 return ret;
173
174 reg3 = RT715_PRIV_DATA_R_H | nid;
175 ret = regmap_write(rt715->sdw_regmap, reg3,
176 ((*val >> 8) & 0xff));
177 if (ret < 0)
178 return ret;
179 reg4 = reg3 + 0x1000;
180 reg4 |= 0x80;
181 ret = regmap_write(rt715->sdw_regmap, reg4, (*val & 0xff));
182 if (ret < 0)
183 return ret;
184 } else if (mask == 0x3000) {
185 reg += 0x8000;
186 ret = regmap_write(rt715->sdw_regmap, reg, *val);
187 if (ret < 0)
188 return ret;
189 } else if (mask == 0x7000) {
190 reg += 0x2000;
191 reg |= 0x800;
192 ret = regmap_write(rt715->sdw_regmap, reg,
193 ((*val >> 8) & 0xff));
194 if (ret < 0)
195 return ret;
196 reg2 = reg + 0x1000;
197 reg2 |= 0x80;
198 ret = regmap_write(rt715->sdw_regmap, reg2, (*val & 0xff));
199 if (ret < 0)
200 return ret;
201 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */
202 reg2 = reg - 0x1000;
203 reg2 &= ~0x80;
204 ret = regmap_write(rt715->sdw_regmap, reg2,
205 ((*val >> 8) & 0xff));
206 if (ret < 0)
207 return ret;
208 ret = regmap_write(rt715->sdw_regmap, reg, (*val & 0xff));
209 if (ret < 0)
210 return ret;
211 } else if (mask == 0x9000) {
212 ret = regmap_write(rt715->sdw_regmap, reg,
213 ((*val >> 8) & 0xff));
214 if (ret < 0)
215 return ret;
216 reg2 = reg + 0x1000;
217 reg2 |= 0x80;
218 ret = regmap_write(rt715->sdw_regmap, reg2, (*val & 0xff));
219 if (ret < 0)
220 return ret;
221 } else if (mask == 0xb000) {
222 ret = regmap_write(rt715->sdw_regmap, reg, *val);
223 if (ret < 0)
224 return ret;
225 } else {
226 ret = regmap_read(rt715->sdw_regmap, reg, val);
227 if (ret < 0)
228 return ret;
229 is_hda_reg = 0;
230 }
231
232 if (is_hda_reg || is_index_reg) {
233 sdw_data_3 = 0;
234 sdw_data_2 = 0;
235 sdw_data_1 = 0;
236 sdw_data_0 = 0;
237 ret = regmap_read(rt715->sdw_regmap, RT715_READ_HDA_3,
238 &sdw_data_3);
239 if (ret < 0)
240 return ret;
241 ret = regmap_read(rt715->sdw_regmap, RT715_READ_HDA_2,
242 &sdw_data_2);
243 if (ret < 0)
244 return ret;
245 ret = regmap_read(rt715->sdw_regmap, RT715_READ_HDA_1,
246 &sdw_data_1);
247 if (ret < 0)
248 return ret;
249 ret = regmap_read(rt715->sdw_regmap, RT715_READ_HDA_0,
250 &sdw_data_0);
251 if (ret < 0)
252 return ret;
253 *val = ((sdw_data_3 & 0xff) << 24) |
254 ((sdw_data_2 & 0xff) << 16) |
255 ((sdw_data_1 & 0xff) << 8) | (sdw_data_0 & 0xff);
256 }
257
258 if (is_hda_reg == 0)
259 dev_dbg(dev, "[%s] %04x => %08x\n", __func__, reg, *val);
260 else if (is_index_reg)
261 dev_dbg(dev, "[%s] %04x %04x %04x %04x => %08x\n", __func__,
262 reg, reg2, reg3, reg4, *val);
263 else
264 dev_dbg(dev, "[%s] %04x %04x => %08x\n",
265 __func__, reg, reg2, *val);
266
267 return 0;
268 }
269
rt715_sdw_write(void * context,unsigned int reg,unsigned int val)270 static int rt715_sdw_write(void *context, unsigned int reg, unsigned int val)
271 {
272 struct device *dev = context;
273 struct rt715_priv *rt715 = dev_get_drvdata(dev);
274 unsigned int reg2 = 0, reg3, reg4, nid, mask, val2;
275 unsigned int is_index_reg = 0;
276 int ret;
277
278 if (reg > 0xffff)
279 is_index_reg = 1;
280
281 mask = reg & 0xf000;
282
283 if (is_index_reg) { /* index registers */
284 val2 = reg & 0xff;
285 reg = reg >> 8;
286 nid = reg & 0xff;
287 ret = regmap_write(rt715->sdw_regmap, reg, 0);
288 if (ret < 0)
289 return ret;
290 reg2 = reg + 0x1000;
291 reg2 |= 0x80;
292 ret = regmap_write(rt715->sdw_regmap, reg2, val2);
293 if (ret < 0)
294 return ret;
295
296 reg3 = RT715_PRIV_DATA_W_H | nid;
297 ret = regmap_write(rt715->sdw_regmap, reg3,
298 ((val >> 8) & 0xff));
299 if (ret < 0)
300 return ret;
301 reg4 = reg3 + 0x1000;
302 reg4 |= 0x80;
303 ret = regmap_write(rt715->sdw_regmap, reg4, (val & 0xff));
304 if (ret < 0)
305 return ret;
306 is_index_reg = 1;
307 } else if (reg < 0x4fff) {
308 ret = regmap_write(rt715->sdw_regmap, reg, val);
309 if (ret < 0)
310 return ret;
311 } else if (reg == RT715_FUNC_RESET) {
312 ret = regmap_write(rt715->sdw_regmap, reg, val);
313 if (ret < 0)
314 return ret;
315 } else if (mask == 0x7000) {
316 ret = regmap_write(rt715->sdw_regmap, reg,
317 ((val >> 8) & 0xff));
318 if (ret < 0)
319 return ret;
320 reg2 = reg + 0x1000;
321 reg2 |= 0x80;
322 ret = regmap_write(rt715->sdw_regmap, reg2, (val & 0xff));
323 if (ret < 0)
324 return ret;
325 } else if ((reg & 0xff00) == 0x8300) { /* for R channel */
326 reg2 = reg - 0x1000;
327 reg2 &= ~0x80;
328 ret = regmap_write(rt715->sdw_regmap, reg2,
329 ((val >> 8) & 0xff));
330 if (ret < 0)
331 return ret;
332 ret = regmap_write(rt715->sdw_regmap, reg, (val & 0xff));
333 if (ret < 0)
334 return ret;
335 }
336
337 if (reg2 == 0)
338 dev_dbg(dev, "[%s] %04x <= %04x\n", __func__, reg, val);
339 else if (is_index_reg)
340 dev_dbg(dev, "[%s] %04x %04x %04x %04x <= %04x %04x\n",
341 __func__, reg, reg2, reg3, reg4, val2, val);
342 else
343 dev_dbg(dev, "[%s] %04x %04x <= %04x\n",
344 __func__, reg, reg2, val);
345
346 return 0;
347 }
348
349 static const struct regmap_config rt715_regmap = {
350 .reg_bits = 24,
351 .val_bits = 32,
352 .readable_reg = rt715_readable_register, /* Readable registers */
353 .volatile_reg = rt715_volatile_register, /* volatile register */
354 .max_register = 0x752039, /* Maximum number of register */
355 .reg_defaults = rt715_reg_defaults, /* Defaults */
356 .num_reg_defaults = ARRAY_SIZE(rt715_reg_defaults),
357 .cache_type = REGCACHE_MAPLE,
358 .use_single_read = true,
359 .use_single_write = true,
360 .reg_read = rt715_sdw_read,
361 .reg_write = rt715_sdw_write,
362 };
363
364 static const struct regmap_config rt715_sdw_regmap = {
365 .name = "sdw",
366 .reg_bits = 32, /* Total register space for SDW */
367 .val_bits = 8, /* Total number of bits in register */
368 .max_register = 0xff01, /* Maximum number of register */
369 .cache_type = REGCACHE_NONE,
370 .use_single_read = true,
371 .use_single_write = true,
372 };
373
rt715_update_status(struct sdw_slave * slave,enum sdw_slave_status status)374 static int rt715_update_status(struct sdw_slave *slave,
375 enum sdw_slave_status status)
376 {
377 struct rt715_priv *rt715 = dev_get_drvdata(&slave->dev);
378
379 /*
380 * Perform initialization only if slave status is present and
381 * hw_init flag is false
382 */
383 if (rt715->hw_init || status != SDW_SLAVE_ATTACHED)
384 return 0;
385
386 /* perform I/O transfers required for Slave initialization */
387 return rt715_io_init(&slave->dev, slave);
388 }
389
rt715_read_prop(struct sdw_slave * slave)390 static int rt715_read_prop(struct sdw_slave *slave)
391 {
392 struct sdw_slave_prop *prop = &slave->prop;
393 int nval, i;
394 u32 bit;
395 unsigned long addr;
396 struct sdw_dpn_prop *dpn;
397
398 prop->scp_int1_mask = SDW_SCP_INT1_IMPL_DEF | SDW_SCP_INT1_BUS_CLASH |
399 SDW_SCP_INT1_PARITY;
400 prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;
401
402 prop->paging_support = false;
403
404 /* first we need to allocate memory for set bits in port lists */
405 prop->source_ports = 0x50;/* BITMAP: 01010000 */
406 prop->sink_ports = 0x0; /* BITMAP: 00000000 */
407
408 nval = hweight32(prop->source_ports);
409 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
410 sizeof(*prop->src_dpn_prop),
411 GFP_KERNEL);
412 if (!prop->src_dpn_prop)
413 return -ENOMEM;
414
415 dpn = prop->src_dpn_prop;
416 i = 0;
417 addr = prop->source_ports;
418 for_each_set_bit(bit, &addr, 32) {
419 dpn[i].num = bit;
420 dpn[i].simple_ch_prep_sm = true;
421 dpn[i].ch_prep_timeout = 10;
422 i++;
423 }
424
425 /* set the timeout values */
426 prop->clk_stop_timeout = 20;
427
428 /* wake-up event */
429 prop->wake_capable = 1;
430
431 return 0;
432 }
433
rt715_bus_config(struct sdw_slave * slave,struct sdw_bus_params * params)434 static int rt715_bus_config(struct sdw_slave *slave,
435 struct sdw_bus_params *params)
436 {
437 struct rt715_priv *rt715 = dev_get_drvdata(&slave->dev);
438 int ret;
439
440 memcpy(&rt715->params, params, sizeof(*params));
441
442 ret = rt715_clock_config(&slave->dev);
443 if (ret < 0)
444 dev_err(&slave->dev, "%s: Invalid clk config", __func__);
445
446 return 0;
447 }
448
449 static const struct sdw_slave_ops rt715_slave_ops = {
450 .read_prop = rt715_read_prop,
451 .update_status = rt715_update_status,
452 .bus_config = rt715_bus_config,
453 };
454
rt715_sdw_probe(struct sdw_slave * slave,const struct sdw_device_id * id)455 static int rt715_sdw_probe(struct sdw_slave *slave,
456 const struct sdw_device_id *id)
457 {
458 struct regmap *sdw_regmap, *regmap;
459
460 /* Regmap Initialization */
461 sdw_regmap = devm_regmap_init_sdw(slave, &rt715_sdw_regmap);
462 if (IS_ERR(sdw_regmap))
463 return PTR_ERR(sdw_regmap);
464
465 regmap = devm_regmap_init(&slave->dev, NULL, &slave->dev,
466 &rt715_regmap);
467 if (IS_ERR(regmap))
468 return PTR_ERR(regmap);
469
470 return rt715_init(&slave->dev, sdw_regmap, regmap, slave);
471 }
472
rt715_sdw_remove(struct sdw_slave * slave)473 static void rt715_sdw_remove(struct sdw_slave *slave)
474 {
475 pm_runtime_disable(&slave->dev);
476 }
477
478 static const struct sdw_device_id rt715_id[] = {
479 SDW_SLAVE_ENTRY_EXT(0x025d, 0x714, 0x2, 0, 0),
480 SDW_SLAVE_ENTRY_EXT(0x025d, 0x715, 0x2, 0, 0),
481 {},
482 };
483 MODULE_DEVICE_TABLE(sdw, rt715_id);
484
rt715_dev_suspend(struct device * dev)485 static int rt715_dev_suspend(struct device *dev)
486 {
487 struct rt715_priv *rt715 = dev_get_drvdata(dev);
488
489 if (!rt715->hw_init)
490 return 0;
491
492 regcache_cache_only(rt715->regmap, true);
493
494 return 0;
495 }
496
497 #define RT715_PROBE_TIMEOUT 5000
498
rt715_dev_resume(struct device * dev)499 static int rt715_dev_resume(struct device *dev)
500 {
501 struct sdw_slave *slave = dev_to_sdw_dev(dev);
502 struct rt715_priv *rt715 = dev_get_drvdata(dev);
503 int ret;
504
505 if (!rt715->first_hw_init)
506 return 0;
507
508 ret = sdw_slave_wait_for_init(slave, RT715_PROBE_TIMEOUT);
509 if (ret) {
510 sdw_show_ping_status(slave->bus, true);
511 return ret;
512 }
513
514 regcache_cache_only(rt715->regmap, false);
515 regcache_sync_region(rt715->regmap, 0x3000, 0x8fff);
516 regcache_sync_region(rt715->regmap, 0x752039, 0x752039);
517
518 return 0;
519 }
520
521 static const struct dev_pm_ops rt715_pm = {
522 SYSTEM_SLEEP_PM_OPS(rt715_dev_suspend, rt715_dev_resume)
523 RUNTIME_PM_OPS(rt715_dev_suspend, rt715_dev_resume, NULL)
524 };
525
526 static struct sdw_driver rt715_sdw_driver = {
527 .driver = {
528 .name = "rt715",
529 .pm = pm_ptr(&rt715_pm),
530 },
531 .probe = rt715_sdw_probe,
532 .remove = rt715_sdw_remove,
533 .ops = &rt715_slave_ops,
534 .id_table = rt715_id,
535 };
536 module_sdw_driver(rt715_sdw_driver);
537
538 MODULE_DESCRIPTION("ASoC RT715 driver SDW");
539 MODULE_AUTHOR("Jack Yu <jack.yu@realtek.com>");
540 MODULE_LICENSE("GPL v2");
541