tjh.dev
Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-only
2//
3// rt715-sdca-sdw.c -- rt715 ALSA SoC audio driver
4//
5// Copyright(c) 2020 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 "rt715-sdca.h"
20#include "rt715-sdca-sdw.h"
21
22static bool rt715_sdca_readable_register(struct device *dev, unsigned int reg)
23{
24 switch (reg) {
25 case 0x201a ... 0x2027:
26 case 0x2029 ... 0x202a:
27 case 0x202d ... 0x2034:
28 case 0x2200 ... 0x2204:
29 case 0x2206 ... 0x2212:
30 case 0x2230 ... 0x2239:
31 case 0x2f5b:
32 case SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
33 RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00):
34 return true;
35 default:
36 return false;
37 }
38}
39
40static bool rt715_sdca_volatile_register(struct device *dev, unsigned int reg)
41{
42 switch (reg) {
43 case 0x201b:
44 case 0x201c:
45 case 0x201d:
46 case 0x201f:
47 case 0x2021:
48 case 0x2023:
49 case 0x2230:
50 case 0x202d ... 0x202f: /* BRA */
51 case 0x2200 ... 0x2212: /* i2c debug */
52 case 0x2f07:
53 case 0x2f1b ... 0x2f1e:
54 case 0x2f30 ... 0x2f34:
55 case 0x2f50 ... 0x2f51:
56 case 0x2f53 ... 0x2f59:
57 case 0x2f5c ... 0x2f5f:
58 case SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
59 RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00): /* VAD Searching status */
60 return true;
61 default:
62 return false;
63 }
64}
65
66static bool rt715_sdca_mbq_readable_register(struct device *dev, unsigned int reg)
67{
68 switch (reg) {
69 case 0x2000000:
70 case 0x200002b:
71 case 0x2000036:
72 case 0x2000037:
73 case 0x2000039:
74 case 0x2000044:
75 case 0x6100000:
76 return true;
77 default:
78 return false;
79 }
80}
81
82static bool rt715_sdca_mbq_volatile_register(struct device *dev, unsigned int reg)
83{
84 switch (reg) {
85 case 0x2000000:
86 return true;
87 default:
88 return false;
89 }
90}
91
92static const struct regmap_config rt715_sdca_regmap = {
93 .reg_bits = 32,
94 .val_bits = 8,
95 .readable_reg = rt715_sdca_readable_register,
96 .volatile_reg = rt715_sdca_volatile_register,
97 .max_register = 0x43ffffff,
98 .reg_defaults = rt715_reg_defaults_sdca,
99 .num_reg_defaults = ARRAY_SIZE(rt715_reg_defaults_sdca),
100 .cache_type = REGCACHE_RBTREE,
101 .use_single_read = true,
102 .use_single_write = true,
103};
104
105static const struct regmap_config rt715_sdca_mbq_regmap = {
106 .name = "sdw-mbq",
107 .reg_bits = 32,
108 .val_bits = 16,
109 .readable_reg = rt715_sdca_mbq_readable_register,
110 .volatile_reg = rt715_sdca_mbq_volatile_register,
111 .max_register = 0x43ffffff,
112 .reg_defaults = rt715_mbq_reg_defaults_sdca,
113 .num_reg_defaults = ARRAY_SIZE(rt715_mbq_reg_defaults_sdca),
114 .cache_type = REGCACHE_RBTREE,
115 .use_single_read = true,
116 .use_single_write = true,
117};
118
119static int rt715_sdca_update_status(struct sdw_slave *slave,
120 enum sdw_slave_status status)
121{
122 struct rt715_sdca_priv *rt715 = dev_get_drvdata(&slave->dev);
123
124 /* Update the status */
125 rt715->status = status;
126
127 /*
128 * Perform initialization only if slave status is present and
129 * hw_init flag is false
130 */
131 if (rt715->hw_init || rt715->status != SDW_SLAVE_ATTACHED)
132 return 0;
133
134 /* perform I/O transfers required for Slave initialization */
135 return rt715_sdca_io_init(&slave->dev, slave);
136}
137
138static int rt715_sdca_read_prop(struct sdw_slave *slave)
139{
140 struct sdw_slave_prop *prop = &slave->prop;
141 int nval, i;
142 u32 bit;
143 unsigned long addr;
144 struct sdw_dpn_prop *dpn;
145
146 prop->paging_support = true;
147
148 /* first we need to allocate memory for set bits in port lists */
149 prop->source_ports = 0x50;/* BITMAP: 01010000 */
150 prop->sink_ports = 0x0; /* BITMAP: 00000000 */
151
152 nval = hweight32(prop->source_ports);
153 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
154 sizeof(*prop->src_dpn_prop),
155 GFP_KERNEL);
156 if (!prop->src_dpn_prop)
157 return -ENOMEM;
158
159 dpn = prop->src_dpn_prop;
160 i = 0;
161 addr = prop->source_ports;
162 for_each_set_bit(bit, &addr, 32) {
163 dpn[i].num = bit;
164 dpn[i].simple_ch_prep_sm = true;
165 dpn[i].ch_prep_timeout = 10;
166 i++;
167 }
168
169 /* set the timeout values */
170 prop->clk_stop_timeout = 20;
171
172 return 0;
173}
174
175static struct sdw_slave_ops rt715_sdca_slave_ops = {
176 .read_prop = rt715_sdca_read_prop,
177 .update_status = rt715_sdca_update_status,
178};
179
180static int rt715_sdca_sdw_probe(struct sdw_slave *slave,
181 const struct sdw_device_id *id)
182{
183 struct regmap *mbq_regmap, *regmap;
184
185 /* Regmap Initialization */
186 mbq_regmap = devm_regmap_init_sdw_mbq(slave, &rt715_sdca_mbq_regmap);
187 if (IS_ERR(mbq_regmap))
188 return PTR_ERR(mbq_regmap);
189
190 regmap = devm_regmap_init_sdw(slave, &rt715_sdca_regmap);
191 if (IS_ERR(regmap))
192 return PTR_ERR(regmap);
193
194 return rt715_sdca_init(&slave->dev, mbq_regmap, regmap, slave);
195}
196
197static int rt715_sdca_sdw_remove(struct sdw_slave *slave)
198{
199 struct rt715_sdca_priv *rt715 = dev_get_drvdata(&slave->dev);
200
201 if (rt715->first_hw_init)
202 pm_runtime_disable(&slave->dev);
203
204 return 0;
205}
206
207static const struct sdw_device_id rt715_sdca_id[] = {
208 SDW_SLAVE_ENTRY_EXT(0x025d, 0x715, 0x3, 0x1, 0),
209 SDW_SLAVE_ENTRY_EXT(0x025d, 0x714, 0x3, 0x1, 0),
210 {},
211};
212MODULE_DEVICE_TABLE(sdw, rt715_sdca_id);
213
214static int __maybe_unused rt715_dev_suspend(struct device *dev)
215{
216 struct rt715_sdca_priv *rt715 = dev_get_drvdata(dev);
217
218 if (!rt715->hw_init)
219 return 0;
220
221 regcache_cache_only(rt715->regmap, true);
222 regcache_mark_dirty(rt715->regmap);
223 regcache_cache_only(rt715->mbq_regmap, true);
224 regcache_mark_dirty(rt715->mbq_regmap);
225
226 return 0;
227}
228
229#define RT715_PROBE_TIMEOUT 5000
230
231static int __maybe_unused rt715_dev_resume(struct device *dev)
232{
233 struct sdw_slave *slave = dev_to_sdw_dev(dev);
234 struct rt715_sdca_priv *rt715 = dev_get_drvdata(dev);
235 unsigned long time;
236
237 if (!rt715->first_hw_init)
238 return 0;
239
240 if (!slave->unattach_request)
241 goto regmap_sync;
242
243 time = wait_for_completion_timeout(&slave->enumeration_complete,
244 msecs_to_jiffies(RT715_PROBE_TIMEOUT));
245 if (!time) {
246 dev_err(&slave->dev, "Enumeration not complete, timed out\n");
247 return -ETIMEDOUT;
248 }
249
250regmap_sync:
251 slave->unattach_request = 0;
252 regcache_cache_only(rt715->regmap, false);
253 regcache_sync_region(rt715->regmap,
254 SDW_SDCA_CTL(FUN_JACK_CODEC, RT715_SDCA_ST_EN, RT715_SDCA_ST_CTRL,
255 CH_00),
256 SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
257 RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00));
258 regcache_cache_only(rt715->mbq_regmap, false);
259 regcache_sync_region(rt715->mbq_regmap, 0x2000000, 0x61020ff);
260 regcache_sync_region(rt715->mbq_regmap,
261 SDW_SDCA_CTL(FUN_JACK_CODEC, RT715_SDCA_ST_EN, RT715_SDCA_ST_CTRL,
262 CH_00),
263 SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
264 RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00));
265
266 return 0;
267}
268
269static const struct dev_pm_ops rt715_pm = {
270 SET_SYSTEM_SLEEP_PM_OPS(rt715_dev_suspend, rt715_dev_resume)
271 SET_RUNTIME_PM_OPS(rt715_dev_suspend, rt715_dev_resume, NULL)
272};
273
274static struct sdw_driver rt715_sdw_driver = {
275 .driver = {
276 .name = "rt715-sdca",
277 .owner = THIS_MODULE,
278 .pm = &rt715_pm,
279 },
280 .probe = rt715_sdca_sdw_probe,
281 .remove = rt715_sdca_sdw_remove,
282 .ops = &rt715_sdca_slave_ops,
283 .id_table = rt715_sdca_id,
284};
285module_sdw_driver(rt715_sdw_driver);
286
287MODULE_DESCRIPTION("ASoC RT715 driver SDW SDCA");
288MODULE_AUTHOR("Jack Yu <jack.yu@realtek.com>");
289MODULE_LICENSE("GPL v2");