cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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rt715-sdca-sdw.c (7244B)

      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");