sound/soc/codecs/rt715-sdca-sdw.c

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