1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // rt722-sdca-sdw.c -- rt722 SDCA ALSA SoC audio driver
4 //
5 // Copyright(c) 2023 Realtek Semiconductor Corp.
6 //
7 //
8
9 #include <linux/delay.h>
10 #include <linux/device.h>
11 #include <linux/module.h>
12 #include <linux/mod_devicetable.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/soundwire/sdw_registers.h>
15
16 #include "rt722-sdca.h"
17 #include "rt722-sdca-sdw.h"
18
rt722_sdca_readable_register(struct device * dev,unsigned int reg)19 static bool rt722_sdca_readable_register(struct device *dev, unsigned int reg)
20 {
21 switch (reg) {
22 case 0x2f01 ... 0x2f0a:
23 case 0x2f35 ... 0x2f36:
24 case 0x2f50:
25 case 0x2f54:
26 case 0x2f58 ... 0x2f5d:
27 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_GE49, RT722_SDCA_CTL_SELECTED_MODE,
28 0):
29 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_GE49, RT722_SDCA_CTL_DETECTED_MODE,
30 0):
31 case SDW_SDCA_CTL(FUNC_NUM_HID, RT722_SDCA_ENT_HID01, RT722_SDCA_CTL_HIDTX_CURRENT_OWNER,
32 0) ... SDW_SDCA_CTL(FUNC_NUM_HID, RT722_SDCA_ENT_HID01,
33 RT722_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0):
34 case RT722_BUF_ADDR_HID1 ... RT722_BUF_ADDR_HID2:
35 return true;
36 default:
37 return false;
38 }
39 }
40
rt722_sdca_volatile_register(struct device * dev,unsigned int reg)41 static bool rt722_sdca_volatile_register(struct device *dev, unsigned int reg)
42 {
43 switch (reg) {
44 case 0x2f01:
45 case 0x2f54:
46 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_GE49, RT722_SDCA_CTL_DETECTED_MODE,
47 0):
48 case SDW_SDCA_CTL(FUNC_NUM_HID, RT722_SDCA_ENT_HID01, RT722_SDCA_CTL_HIDTX_CURRENT_OWNER,
49 0) ... SDW_SDCA_CTL(FUNC_NUM_HID, RT722_SDCA_ENT_HID01,
50 RT722_SDCA_CTL_HIDTX_MESSAGE_LENGTH, 0):
51 case RT722_BUF_ADDR_HID1 ... RT722_BUF_ADDR_HID2:
52 return true;
53 default:
54 return false;
55 }
56 }
57
rt722_sdca_mbq_readable_register(struct device * dev,unsigned int reg)58 static bool rt722_sdca_mbq_readable_register(struct device *dev, unsigned int reg)
59 {
60 switch (reg) {
61 case 0x2000000 ... 0x2000024:
62 case 0x2000029 ... 0x200004a:
63 case 0x2000051 ... 0x2000052:
64 case 0x200005a ... 0x200005b:
65 case 0x2000061 ... 0x2000069:
66 case 0x200006b:
67 case 0x2000070:
68 case 0x200007f:
69 case 0x2000082 ... 0x200008e:
70 case 0x2000090 ... 0x2000094:
71 case 0x5300000 ... 0x5300002:
72 case 0x5400002:
73 case 0x5600000 ... 0x5600007:
74 case 0x5700000 ... 0x5700004:
75 case 0x5800000 ... 0x5800004:
76 case 0x5b00003:
77 case 0x5c00011:
78 case 0x5d00006:
79 case 0x5f00000 ... 0x5f0000d:
80 case 0x5f00030:
81 case 0x6100000 ... 0x6100051:
82 case 0x6100055 ... 0x6100057:
83 case 0x6100062:
84 case 0x6100064 ... 0x6100065:
85 case 0x6100067:
86 case 0x6100070 ... 0x610007c:
87 case 0x6100080:
88 case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT722_SDCA_ENT_USER_FU1E, RT722_SDCA_CTL_FU_VOLUME,
89 CH_01):
90 case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT722_SDCA_ENT_USER_FU1E, RT722_SDCA_CTL_FU_VOLUME,
91 CH_02):
92 case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT722_SDCA_ENT_USER_FU1E, RT722_SDCA_CTL_FU_VOLUME,
93 CH_03):
94 case SDW_SDCA_CTL(FUNC_NUM_MIC_ARRAY, RT722_SDCA_ENT_USER_FU1E, RT722_SDCA_CTL_FU_VOLUME,
95 CH_04):
96 case SDW_SDCA_CTL(FUNC_NUM_AMP, RT722_SDCA_ENT_USER_FU06, RT722_SDCA_CTL_FU_VOLUME, CH_L):
97 case SDW_SDCA_CTL(FUNC_NUM_AMP, RT722_SDCA_ENT_USER_FU06, RT722_SDCA_CTL_FU_VOLUME, CH_R):
98 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_USER_FU05, RT722_SDCA_CTL_FU_VOLUME,
99 CH_L):
100 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_USER_FU05, RT722_SDCA_CTL_FU_VOLUME,
101 CH_R):
102 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_USER_FU0F, RT722_SDCA_CTL_FU_VOLUME,
103 CH_L):
104 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_USER_FU0F, RT722_SDCA_CTL_FU_VOLUME,
105 CH_R):
106 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_PLATFORM_FU44,
107 RT722_SDCA_CTL_FU_CH_GAIN, CH_L):
108 case SDW_SDCA_CTL(FUNC_NUM_JACK_CODEC, RT722_SDCA_ENT_PLATFORM_FU44,
109 RT722_SDCA_CTL_FU_CH_GAIN, CH_R):
110 return true;
111 default:
112 return false;
113 }
114 }
115
rt722_sdca_mbq_volatile_register(struct device * dev,unsigned int reg)116 static bool rt722_sdca_mbq_volatile_register(struct device *dev, unsigned int reg)
117 {
118 switch (reg) {
119 case 0x2000000:
120 case 0x200000d:
121 case 0x2000019:
122 case 0x2000020:
123 case 0x2000030:
124 case 0x2000046:
125 case 0x2000067:
126 case 0x2000084:
127 case 0x2000086:
128 return true;
129 default:
130 return false;
131 }
132 }
133
134 static const struct regmap_config rt722_sdca_regmap = {
135 .reg_bits = 32,
136 .val_bits = 8,
137 .readable_reg = rt722_sdca_readable_register,
138 .volatile_reg = rt722_sdca_volatile_register,
139 .max_register = 0x44ffffff,
140 .reg_defaults = rt722_sdca_reg_defaults,
141 .num_reg_defaults = ARRAY_SIZE(rt722_sdca_reg_defaults),
142 .cache_type = REGCACHE_MAPLE,
143 .use_single_read = true,
144 .use_single_write = true,
145 };
146
147 static const struct regmap_config rt722_sdca_mbq_regmap = {
148 .name = "sdw-mbq",
149 .reg_bits = 32,
150 .val_bits = 16,
151 .readable_reg = rt722_sdca_mbq_readable_register,
152 .volatile_reg = rt722_sdca_mbq_volatile_register,
153 .max_register = 0x41000312,
154 .reg_defaults = rt722_sdca_mbq_defaults,
155 .num_reg_defaults = ARRAY_SIZE(rt722_sdca_mbq_defaults),
156 .cache_type = REGCACHE_MAPLE,
157 .use_single_read = true,
158 .use_single_write = true,
159 };
160
rt722_sdca_update_status(struct sdw_slave * slave,enum sdw_slave_status status)161 static int rt722_sdca_update_status(struct sdw_slave *slave,
162 enum sdw_slave_status status)
163 {
164 struct rt722_sdca_priv *rt722 = dev_get_drvdata(&slave->dev);
165
166 if (status == SDW_SLAVE_UNATTACHED)
167 rt722->hw_init = false;
168
169 if (status == SDW_SLAVE_ATTACHED) {
170 if (rt722->hs_jack) {
171 /*
172 * Due to the SCP_SDCA_INTMASK will be cleared by any reset, and then
173 * if the device attached again, we will need to set the setting back.
174 * It could avoid losing the jack detection interrupt.
175 * This also could sync with the cache value as the rt722_sdca_jack_init set.
176 */
177 sdw_write_no_pm(rt722->slave, SDW_SCP_SDCA_INTMASK1,
178 SDW_SCP_SDCA_INTMASK_SDCA_6);
179 sdw_write_no_pm(rt722->slave, SDW_SCP_SDCA_INTMASK2,
180 SDW_SCP_SDCA_INTMASK_SDCA_8);
181 }
182 }
183
184 /*
185 * Perform initialization only if slave status is present and
186 * hw_init flag is false
187 */
188 if (rt722->hw_init || status != SDW_SLAVE_ATTACHED)
189 return 0;
190
191 /* perform I/O transfers required for Slave initialization */
192 return rt722_sdca_io_init(&slave->dev, slave);
193 }
194
rt722_sdca_read_prop(struct sdw_slave * slave)195 static int rt722_sdca_read_prop(struct sdw_slave *slave)
196 {
197 struct sdw_slave_prop *prop = &slave->prop;
198 int nval;
199 int i, j;
200 u32 bit;
201 unsigned long addr;
202 struct sdw_dpn_prop *dpn;
203
204 prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
205 prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;
206
207 prop->paging_support = true;
208
209 /*
210 * port = 1 for headphone playback
211 * port = 2 for headset-mic capture
212 * port = 3 for speaker playback
213 * port = 6 for digital-mic capture
214 */
215 prop->source_ports = BIT(6) | BIT(2); /* BITMAP: 01000100 */
216 prop->sink_ports = BIT(3) | BIT(1); /* BITMAP: 00001010 */
217
218 nval = hweight32(prop->source_ports);
219 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
220 sizeof(*prop->src_dpn_prop), GFP_KERNEL);
221 if (!prop->src_dpn_prop)
222 return -ENOMEM;
223
224 i = 0;
225 dpn = prop->src_dpn_prop;
226 addr = prop->source_ports;
227 for_each_set_bit(bit, &addr, 32) {
228 dpn[i].num = bit;
229 dpn[i].type = SDW_DPN_FULL;
230 dpn[i].simple_ch_prep_sm = true;
231 dpn[i].ch_prep_timeout = 10;
232 i++;
233 }
234
235 /* do this again for sink now */
236 nval = hweight32(prop->sink_ports);
237 prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
238 sizeof(*prop->sink_dpn_prop), GFP_KERNEL);
239 if (!prop->sink_dpn_prop)
240 return -ENOMEM;
241
242 j = 0;
243 dpn = prop->sink_dpn_prop;
244 addr = prop->sink_ports;
245 for_each_set_bit(bit, &addr, 32) {
246 dpn[j].num = bit;
247 dpn[j].type = SDW_DPN_FULL;
248 dpn[j].simple_ch_prep_sm = true;
249 dpn[j].ch_prep_timeout = 10;
250 j++;
251 }
252
253 /* set the timeout values */
254 prop->clk_stop_timeout = 200;
255
256 /* wake-up event */
257 prop->wake_capable = 1;
258
259 return 0;
260 }
261
rt722_sdca_interrupt_callback(struct sdw_slave * slave,struct sdw_slave_intr_status * status)262 static int rt722_sdca_interrupt_callback(struct sdw_slave *slave,
263 struct sdw_slave_intr_status *status)
264 {
265 struct rt722_sdca_priv *rt722 = dev_get_drvdata(&slave->dev);
266 int ret, stat;
267 int count = 0, retry = 3;
268 unsigned int sdca_cascade, scp_sdca_stat1, scp_sdca_stat2 = 0;
269
270 if (cancel_delayed_work_sync(&rt722->jack_detect_work)) {
271 dev_warn(&slave->dev, "%s the pending delayed_work was cancelled", __func__);
272 /* avoid the HID owner doesn't change to device */
273 if (rt722->scp_sdca_stat2)
274 scp_sdca_stat2 = rt722->scp_sdca_stat2;
275 }
276
277 /*
278 * The critical section below intentionally protects a rather large piece of code.
279 * We don't want to allow the system suspend to disable an interrupt while we are
280 * processing it, which could be problematic given the quirky SoundWire interrupt
281 * scheme. We do want however to prevent new workqueues from being scheduled if
282 * the disable_irq flag was set during system suspend.
283 */
284 mutex_lock(&rt722->disable_irq_lock);
285
286 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT1);
287 if (ret < 0)
288 goto io_error;
289 rt722->scp_sdca_stat1 = ret;
290 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT2);
291 if (ret < 0)
292 goto io_error;
293 rt722->scp_sdca_stat2 = ret;
294 if (scp_sdca_stat2)
295 rt722->scp_sdca_stat2 |= scp_sdca_stat2;
296 do {
297 /* clear flag */
298 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT1);
299 if (ret < 0)
300 goto io_error;
301 if (ret & SDW_SCP_SDCA_INTMASK_SDCA_0) {
302 ret = sdw_update_no_pm(rt722->slave, SDW_SCP_SDCA_INT1,
303 SDW_SCP_SDCA_INT_SDCA_0, SDW_SCP_SDCA_INT_SDCA_0);
304 if (ret < 0)
305 goto io_error;
306 } else if (ret & SDW_SCP_SDCA_INTMASK_SDCA_6) {
307 ret = sdw_update_no_pm(rt722->slave, SDW_SCP_SDCA_INT1,
308 SDW_SCP_SDCA_INT_SDCA_6, SDW_SCP_SDCA_INT_SDCA_6);
309 if (ret < 0)
310 goto io_error;
311 }
312 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT2);
313 if (ret < 0)
314 goto io_error;
315 if (ret & SDW_SCP_SDCA_INTMASK_SDCA_8) {
316 ret = sdw_write_no_pm(rt722->slave, SDW_SCP_SDCA_INT2,
317 SDW_SCP_SDCA_INTMASK_SDCA_8);
318 if (ret < 0)
319 goto io_error;
320 }
321
322 /* check if flag clear or not */
323 ret = sdw_read_no_pm(rt722->slave, SDW_DP0_INT);
324 if (ret < 0)
325 goto io_error;
326 sdca_cascade = ret & SDW_DP0_SDCA_CASCADE;
327
328 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT1);
329 if (ret < 0)
330 goto io_error;
331 scp_sdca_stat1 = ret & SDW_SCP_SDCA_INTMASK_SDCA_0;
332
333 ret = sdw_read_no_pm(rt722->slave, SDW_SCP_SDCA_INT2);
334 if (ret < 0)
335 goto io_error;
336 scp_sdca_stat2 = ret & SDW_SCP_SDCA_INTMASK_SDCA_8;
337
338 stat = scp_sdca_stat1 || scp_sdca_stat2 || sdca_cascade;
339
340 count++;
341 } while (stat != 0 && count < retry);
342
343 if (stat)
344 dev_warn(&slave->dev,
345 "%s scp_sdca_stat1=0x%x, scp_sdca_stat2=0x%x\n", __func__,
346 rt722->scp_sdca_stat1, rt722->scp_sdca_stat2);
347
348 if (status->sdca_cascade && !rt722->disable_irq)
349 mod_delayed_work(system_power_efficient_wq,
350 &rt722->jack_detect_work, msecs_to_jiffies(30));
351
352 mutex_unlock(&rt722->disable_irq_lock);
353
354 return 0;
355
356 io_error:
357 mutex_unlock(&rt722->disable_irq_lock);
358 pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret);
359 return ret;
360 }
361
362 static struct sdw_slave_ops rt722_sdca_slave_ops = {
363 .read_prop = rt722_sdca_read_prop,
364 .interrupt_callback = rt722_sdca_interrupt_callback,
365 .update_status = rt722_sdca_update_status,
366 };
367
rt722_sdca_sdw_probe(struct sdw_slave * slave,const struct sdw_device_id * id)368 static int rt722_sdca_sdw_probe(struct sdw_slave *slave,
369 const struct sdw_device_id *id)
370 {
371 struct regmap *regmap, *mbq_regmap;
372
373 /* Regmap Initialization */
374 mbq_regmap = devm_regmap_init_sdw_mbq(slave, &rt722_sdca_mbq_regmap);
375 if (IS_ERR(mbq_regmap))
376 return PTR_ERR(mbq_regmap);
377
378 regmap = devm_regmap_init_sdw(slave, &rt722_sdca_regmap);
379 if (IS_ERR(regmap))
380 return PTR_ERR(regmap);
381
382 return rt722_sdca_init(&slave->dev, regmap, mbq_regmap, slave);
383 }
384
rt722_sdca_sdw_remove(struct sdw_slave * slave)385 static int rt722_sdca_sdw_remove(struct sdw_slave *slave)
386 {
387 struct rt722_sdca_priv *rt722 = dev_get_drvdata(&slave->dev);
388
389 if (rt722->hw_init) {
390 cancel_delayed_work_sync(&rt722->jack_detect_work);
391 cancel_delayed_work_sync(&rt722->jack_btn_check_work);
392 }
393
394 if (rt722->first_hw_init)
395 pm_runtime_disable(&slave->dev);
396
397 mutex_destroy(&rt722->calibrate_mutex);
398 mutex_destroy(&rt722->disable_irq_lock);
399
400 return 0;
401 }
402
403 static const struct sdw_device_id rt722_sdca_id[] = {
404 SDW_SLAVE_ENTRY_EXT(0x025d, 0x722, 0x3, 0x1, 0),
405 {},
406 };
407 MODULE_DEVICE_TABLE(sdw, rt722_sdca_id);
408
rt722_sdca_dev_suspend(struct device * dev)409 static int __maybe_unused rt722_sdca_dev_suspend(struct device *dev)
410 {
411 struct rt722_sdca_priv *rt722 = dev_get_drvdata(dev);
412
413 if (!rt722->hw_init)
414 return 0;
415
416 cancel_delayed_work_sync(&rt722->jack_detect_work);
417 cancel_delayed_work_sync(&rt722->jack_btn_check_work);
418
419 regcache_cache_only(rt722->regmap, true);
420 regcache_cache_only(rt722->mbq_regmap, true);
421
422 return 0;
423 }
424
rt722_sdca_dev_system_suspend(struct device * dev)425 static int __maybe_unused rt722_sdca_dev_system_suspend(struct device *dev)
426 {
427 struct rt722_sdca_priv *rt722_sdca = dev_get_drvdata(dev);
428 struct sdw_slave *slave = dev_to_sdw_dev(dev);
429 int ret1, ret2;
430
431 if (!rt722_sdca->hw_init)
432 return 0;
433
434 /*
435 * prevent new interrupts from being handled after the
436 * deferred work completes and before the parent disables
437 * interrupts on the link
438 */
439 mutex_lock(&rt722_sdca->disable_irq_lock);
440 rt722_sdca->disable_irq = true;
441 ret1 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK1,
442 SDW_SCP_SDCA_INTMASK_SDCA_0 | SDW_SCP_SDCA_INTMASK_SDCA_6, 0);
443 ret2 = sdw_update_no_pm(slave, SDW_SCP_SDCA_INTMASK2,
444 SDW_SCP_SDCA_INTMASK_SDCA_8, 0);
445 mutex_unlock(&rt722_sdca->disable_irq_lock);
446
447 if (ret1 < 0 || ret2 < 0) {
448 /* log but don't prevent suspend from happening */
449 dev_dbg(&slave->dev, "%s: could not disable SDCA interrupts\n:", __func__);
450 }
451
452 return rt722_sdca_dev_suspend(dev);
453 }
454
455 #define RT722_PROBE_TIMEOUT 5000
456
rt722_sdca_dev_resume(struct device * dev)457 static int __maybe_unused rt722_sdca_dev_resume(struct device *dev)
458 {
459 struct sdw_slave *slave = dev_to_sdw_dev(dev);
460 struct rt722_sdca_priv *rt722 = dev_get_drvdata(dev);
461 unsigned long time;
462
463 if (!rt722->first_hw_init)
464 return 0;
465
466 if (!slave->unattach_request) {
467 mutex_lock(&rt722->disable_irq_lock);
468 if (rt722->disable_irq == true) {
469 sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK1, SDW_SCP_SDCA_INTMASK_SDCA_6);
470 sdw_write_no_pm(slave, SDW_SCP_SDCA_INTMASK2, SDW_SCP_SDCA_INTMASK_SDCA_8);
471 rt722->disable_irq = false;
472 }
473 mutex_unlock(&rt722->disable_irq_lock);
474 goto regmap_sync;
475 }
476
477 time = wait_for_completion_timeout(&slave->initialization_complete,
478 msecs_to_jiffies(RT722_PROBE_TIMEOUT));
479 if (!time) {
480 dev_err(&slave->dev, "Initialization not complete, timed out\n");
481 sdw_show_ping_status(slave->bus, true);
482
483 return -ETIMEDOUT;
484 }
485
486 regmap_sync:
487 slave->unattach_request = 0;
488 regcache_cache_only(rt722->regmap, false);
489 regcache_sync(rt722->regmap);
490 regcache_cache_only(rt722->mbq_regmap, false);
491 regcache_sync(rt722->mbq_regmap);
492 return 0;
493 }
494
495 static const struct dev_pm_ops rt722_sdca_pm = {
496 SET_SYSTEM_SLEEP_PM_OPS(rt722_sdca_dev_system_suspend, rt722_sdca_dev_resume)
497 SET_RUNTIME_PM_OPS(rt722_sdca_dev_suspend, rt722_sdca_dev_resume, NULL)
498 };
499
500 static struct sdw_driver rt722_sdca_sdw_driver = {
501 .driver = {
502 .name = "rt722-sdca",
503 .owner = THIS_MODULE,
504 .pm = &rt722_sdca_pm,
505 },
506 .probe = rt722_sdca_sdw_probe,
507 .remove = rt722_sdca_sdw_remove,
508 .ops = &rt722_sdca_slave_ops,
509 .id_table = rt722_sdca_id,
510 };
511 module_sdw_driver(rt722_sdca_sdw_driver);
512
513 MODULE_DESCRIPTION("ASoC RT722 SDCA SDW driver");
514 MODULE_AUTHOR("Jack Yu <jack.yu@realtek.com>");
515 MODULE_LICENSE("GPL");
516