soc/codecs/rt715-sdca-sdw.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 //
0003 // rt715-sdca-sdw.c -- rt715 ALSA SoC audio driver
0004 //
0005 // Copyright(c) 2020 Realtek Semiconductor Corp.
0006 //
0007 //
0008
0009 #include <linux/delay.h>
0010 #include <linux/device.h>
0011 #include <linux/mod_devicetable.h>
0012 #include <linux/soundwire/sdw.h>
0013 #include <linux/soundwire/sdw_type.h>
0014 #include <linux/soundwire/sdw_registers.h>
0015 #include <linux/module.h>
0016 #include <linux/pm_runtime.h>
0017 #include <linux/regmap.h>
0018 #include <sound/soc.h>
0019 #include "rt715-sdca.h"
0020 #include "rt715-sdca-sdw.h"
0021
0022 static bool rt715_sdca_readable_register(struct device *dev, unsigned int reg)
0023 {
0024     switch (reg) {
0025     case 0x201a ... 0x2027:
0026     case 0x2029 ... 0x202a:
0027     case 0x202d ... 0x2034:
0028     case 0x2200 ... 0x2204:
0029     case 0x2206 ... 0x2212:
0030     case 0x2230 ... 0x2239:
0031     case 0x2f5b:
0032     case SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
0033         RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00):
0034         return true;
0035     default:
0036         return false;
0037     }
0038 }
0039
0040 static bool rt715_sdca_volatile_register(struct device *dev, unsigned int reg)
0041 {
0042     switch (reg) {
0043     case 0x201b:
0044     case 0x201c:
0045     case 0x201d:
0046     case 0x201f:
0047     case 0x2021:
0048     case 0x2023:
0049     case 0x2230:
0050     case 0x202d ... 0x202f: /* BRA */
0051     case 0x2200 ... 0x2212: /* i2c debug */
0052     case 0x2f07:
0053     case 0x2f1b ... 0x2f1e:
0054     case 0x2f30 ... 0x2f34:
0055     case 0x2f50 ... 0x2f51:
0056     case 0x2f53 ... 0x2f59:
0057     case 0x2f5c ... 0x2f5f:
0058     case SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
0059         RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00): /* VAD Searching status */
0060         return true;
0061     default:
0062         return false;
0063     }
0064 }
0065
0066 static bool rt715_sdca_mbq_readable_register(struct device *dev, unsigned int reg)
0067 {
0068     switch (reg) {
0069     case 0x2000000:
0070     case 0x200002b:
0071     case 0x2000036:
0072     case 0x2000037:
0073     case 0x2000039:
0074     case 0x2000044:
0075     case 0x6100000:
0076         return true;
0077     default:
0078         return false;
0079     }
0080 }
0081
0082 static bool rt715_sdca_mbq_volatile_register(struct device *dev, unsigned int reg)
0083 {
0084     switch (reg) {
0085     case 0x2000000:
0086         return true;
0087     default:
0088         return false;
0089     }
0090 }
0091
0092 static const struct regmap_config rt715_sdca_regmap = {
0093     .reg_bits = 32,
0094     .val_bits = 8,
0095     .readable_reg = rt715_sdca_readable_register,
0096     .volatile_reg = rt715_sdca_volatile_register,
0097     .max_register = 0x43ffffff,
0098     .reg_defaults = rt715_reg_defaults_sdca,
0099     .num_reg_defaults = ARRAY_SIZE(rt715_reg_defaults_sdca),
0100     .cache_type = REGCACHE_RBTREE,
0101     .use_single_read = true,
0102     .use_single_write = true,
0103 };
0104
0105 static const struct regmap_config rt715_sdca_mbq_regmap = {
0106     .name = "sdw-mbq",
0107     .reg_bits = 32,
0108     .val_bits = 16,
0109     .readable_reg = rt715_sdca_mbq_readable_register,
0110     .volatile_reg = rt715_sdca_mbq_volatile_register,
0111     .max_register = 0x43ffffff,
0112     .reg_defaults = rt715_mbq_reg_defaults_sdca,
0113     .num_reg_defaults = ARRAY_SIZE(rt715_mbq_reg_defaults_sdca),
0114     .cache_type = REGCACHE_RBTREE,
0115     .use_single_read = true,
0116     .use_single_write = true,
0117 };
0118
0119 static int rt715_sdca_update_status(struct sdw_slave *slave,
0120                 enum sdw_slave_status status)
0121 {
0122     struct rt715_sdca_priv *rt715 = dev_get_drvdata(&slave->dev);
0123
0124     /* Update the status */
0125     rt715->status = status;
0126
0127     /*
0128      * Perform initialization only if slave status is present and
0129      * hw_init flag is false
0130      */
0131     if (rt715->hw_init || rt715->status != SDW_SLAVE_ATTACHED)
0132         return 0;
0133
0134     /* perform I/O transfers required for Slave initialization */
0135     return rt715_sdca_io_init(&slave->dev, slave);
0136 }
0137
0138 static int rt715_sdca_read_prop(struct sdw_slave *slave)
0139 {
0140     struct sdw_slave_prop *prop = &slave->prop;
0141     int nval, i;
0142     u32 bit;
0143     unsigned long addr;
0144     struct sdw_dpn_prop *dpn;
0145
0146     prop->paging_support = true;
0147
0148     /* first we need to allocate memory for set bits in port lists */
0149     prop->source_ports = 0x50;/* BITMAP: 01010000 */
0150     prop->sink_ports = 0x0; /* BITMAP:  00000000 */
0151
0152     nval = hweight32(prop->source_ports);
0153     prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
0154                     sizeof(*prop->src_dpn_prop),
0155                     GFP_KERNEL);
0156     if (!prop->src_dpn_prop)
0157         return -ENOMEM;
0158
0159     dpn = prop->src_dpn_prop;
0160     i = 0;
0161     addr = prop->source_ports;
0162     for_each_set_bit(bit, &addr, 32) {
0163         dpn[i].num = bit;
0164         dpn[i].simple_ch_prep_sm = true;
0165         dpn[i].ch_prep_timeout = 10;
0166         i++;
0167     }
0168
0169     /* set the timeout values */
0170     prop->clk_stop_timeout = 20;
0171
0172     return 0;
0173 }
0174
0175 static struct sdw_slave_ops rt715_sdca_slave_ops = {
0176     .read_prop = rt715_sdca_read_prop,
0177     .update_status = rt715_sdca_update_status,
0178 };
0179
0180 static int rt715_sdca_sdw_probe(struct sdw_slave *slave,
0181                const struct sdw_device_id *id)
0182 {
0183     struct regmap *mbq_regmap, *regmap;
0184
0185     /* Regmap Initialization */
0186     mbq_regmap = devm_regmap_init_sdw_mbq(slave, &rt715_sdca_mbq_regmap);
0187     if (IS_ERR(mbq_regmap))
0188         return PTR_ERR(mbq_regmap);
0189
0190     regmap = devm_regmap_init_sdw(slave, &rt715_sdca_regmap);
0191     if (IS_ERR(regmap))
0192         return PTR_ERR(regmap);
0193
0194     return rt715_sdca_init(&slave->dev, mbq_regmap, regmap, slave);
0195 }
0196
0197 static int rt715_sdca_sdw_remove(struct sdw_slave *slave)
0198 {
0199     struct rt715_sdca_priv *rt715 = dev_get_drvdata(&slave->dev);
0200
0201     if (rt715->first_hw_init)
0202         pm_runtime_disable(&slave->dev);
0203
0204     return 0;
0205 }
0206
0207 static const struct sdw_device_id rt715_sdca_id[] = {
0208     SDW_SLAVE_ENTRY_EXT(0x025d, 0x715, 0x3, 0x1, 0),
0209     SDW_SLAVE_ENTRY_EXT(0x025d, 0x714, 0x3, 0x1, 0),
0210     {},
0211 };
0212 MODULE_DEVICE_TABLE(sdw, rt715_sdca_id);
0213
0214 static int __maybe_unused rt715_dev_suspend(struct device *dev)
0215 {
0216     struct rt715_sdca_priv *rt715 = dev_get_drvdata(dev);
0217
0218     if (!rt715->hw_init)
0219         return 0;
0220
0221     regcache_cache_only(rt715->regmap, true);
0222     regcache_mark_dirty(rt715->regmap);
0223     regcache_cache_only(rt715->mbq_regmap, true);
0224     regcache_mark_dirty(rt715->mbq_regmap);
0225
0226     return 0;
0227 }
0228
0229 #define RT715_PROBE_TIMEOUT 5000
0230
0231 static int __maybe_unused rt715_dev_resume(struct device *dev)
0232 {
0233     struct sdw_slave *slave = dev_to_sdw_dev(dev);
0234     struct rt715_sdca_priv *rt715 = dev_get_drvdata(dev);
0235     unsigned long time;
0236
0237     if (!rt715->first_hw_init)
0238         return 0;
0239
0240     if (!slave->unattach_request)
0241         goto regmap_sync;
0242
0243     time = wait_for_completion_timeout(&slave->enumeration_complete,
0244                        msecs_to_jiffies(RT715_PROBE_TIMEOUT));
0245     if (!time) {
0246         dev_err(&slave->dev, "Enumeration not complete, timed out\n");
0247         return -ETIMEDOUT;
0248     }
0249
0250 regmap_sync:
0251     slave->unattach_request = 0;
0252     regcache_cache_only(rt715->regmap, false);
0253     regcache_sync_region(rt715->regmap,
0254         SDW_SDCA_CTL(FUN_JACK_CODEC, RT715_SDCA_ST_EN, RT715_SDCA_ST_CTRL,
0255             CH_00),
0256         SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
0257             RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00));
0258     regcache_cache_only(rt715->mbq_regmap, false);
0259     regcache_sync_region(rt715->mbq_regmap, 0x2000000, 0x61020ff);
0260     regcache_sync_region(rt715->mbq_regmap,
0261         SDW_SDCA_CTL(FUN_JACK_CODEC, RT715_SDCA_ST_EN, RT715_SDCA_ST_CTRL,
0262             CH_00),
0263         SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
0264             RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00));
0265
0266     return 0;
0267 }
0268
0269 static const struct dev_pm_ops rt715_pm = {
0270     SET_SYSTEM_SLEEP_PM_OPS(rt715_dev_suspend, rt715_dev_resume)
0271     SET_RUNTIME_PM_OPS(rt715_dev_suspend, rt715_dev_resume, NULL)
0272 };
0273
0274 static struct sdw_driver rt715_sdw_driver = {
0275     .driver = {
0276         .name = "rt715-sdca",
0277         .owner = THIS_MODULE,
0278         .pm = &rt715_pm,
0279     },
0280     .probe = rt715_sdca_sdw_probe,
0281     .remove = rt715_sdca_sdw_remove,
0282     .ops = &rt715_sdca_slave_ops,
0283     .id_table = rt715_sdca_id,
0284 };
0285 module_sdw_driver(rt715_sdw_driver);
0286
0287 MODULE_DESCRIPTION("ASoC RT715 driver SDW SDCA");
0288 MODULE_AUTHOR("Jack Yu <jack.yu@realtek.com>");
0289 MODULE_LICENSE("GPL v2");