// SPDX-License-Identifier: GPL-2.0-only
//
// rt715-sdca-sdw.c -- rt715 ALSA SoC audio driver
//
// Copyright(c) 2020 Realtek Semiconductor Corp.
//
//

#include <linux/delay.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include <linux/soundwire/sdw_registers.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include "rt715-sdca.h"
#include "rt715-sdca-sdw.h"

static bool rt715_sdca_readable_register(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case 0x201a ... 0x2027:
        case 0x2029 ... 0x202a:
        case 0x202d ... 0x2034:
        case 0x2200 ... 0x2204:
        case 0x2206 ... 0x2212:
        case 0x2230 ... 0x2239:
        case 0x2f5b:
        case SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
                RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00):
                return true;
        default:
                return false;
        }
}

static bool rt715_sdca_volatile_register(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case 0x201b:
        case 0x201c:
        case 0x201d:
        case 0x201f:
        case 0x2021:
        case 0x2023:
        case 0x2230:
        case 0x202d ... 0x202f: /* BRA */
        case 0x2200 ... 0x2212: /* i2c debug */
        case 0x2f07:
        case 0x2f1b ... 0x2f1e:
        case 0x2f30 ... 0x2f34:
        case 0x2f50 ... 0x2f51:
        case 0x2f53 ... 0x2f59:
        case 0x2f5c ... 0x2f5f:
        case SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
                RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00): /* VAD Searching status */
                return true;
        default:
                return false;
        }
}

static bool rt715_sdca_mbq_readable_register(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case 0x2000000:
        case 0x200002b:
        case 0x2000036:
        case 0x2000037:
        case 0x2000039:
        case 0x2000044:
        case 0x6100000:
                return true;
        default:
                return false;
        }
}

static bool rt715_sdca_mbq_volatile_register(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case 0x2000000:
                return true;
        default:
                return false;
        }
}

static const struct regmap_config rt715_sdca_regmap = {
        .reg_bits = 32,
        .val_bits = 8,
        .readable_reg = rt715_sdca_readable_register,
        .volatile_reg = rt715_sdca_volatile_register,
        .max_register = 0x43ffffff,
        .reg_defaults = rt715_reg_defaults_sdca,
        .num_reg_defaults = ARRAY_SIZE(rt715_reg_defaults_sdca),
        .cache_type = REGCACHE_MAPLE,
        .use_single_read = true,
        .use_single_write = true,
};

static const struct regmap_config rt715_sdca_mbq_regmap = {
        .name = "sdw-mbq",
        .reg_bits = 32,
        .val_bits = 16,
        .readable_reg = rt715_sdca_mbq_readable_register,
        .volatile_reg = rt715_sdca_mbq_volatile_register,
        .max_register = 0x43ffffff,
        .reg_defaults = rt715_mbq_reg_defaults_sdca,
        .num_reg_defaults = ARRAY_SIZE(rt715_mbq_reg_defaults_sdca),
        .cache_type = REGCACHE_MAPLE,
        .use_single_read = true,
        .use_single_write = true,
};

static int rt715_sdca_update_status(struct sdw_slave *slave,
                                enum sdw_slave_status status)
{
        struct rt715_sdca_priv *rt715 = dev_get_drvdata(&slave->dev);

        /*
         * Perform initialization only if slave status is present and
         * hw_init flag is false
         */
        if (rt715->hw_init || status != SDW_SLAVE_ATTACHED)
                return 0;

        /* perform I/O transfers required for Slave initialization */
        return rt715_sdca_io_init(&slave->dev, slave);
}

static int rt715_sdca_read_prop(struct sdw_slave *slave)
{
        struct sdw_slave_prop *prop = &slave->prop;
        int nval, i;
        u32 bit;
        unsigned long addr;
        struct sdw_dpn_prop *dpn;

        prop->paging_support = true;

        /* first we need to allocate memory for set bits in port lists */
        prop->source_ports = 0x50;/* BITMAP: 01010000 */
        prop->sink_ports = 0x0; /* BITMAP:  00000000 */

        nval = hweight32(prop->source_ports);
        prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
                                        sizeof(*prop->src_dpn_prop),
                                        GFP_KERNEL);
        if (!prop->src_dpn_prop)
                return -ENOMEM;

        dpn = prop->src_dpn_prop;
        i = 0;
        addr = prop->source_ports;
        for_each_set_bit(bit, &addr, 32) {
                dpn[i].num = bit;
                dpn[i].simple_ch_prep_sm = true;
                dpn[i].ch_prep_timeout = 10;
                i++;
        }

        /* set the timeout values */
        prop->clk_stop_timeout = 200;

        return 0;
}

static const struct sdw_slave_ops rt715_sdca_slave_ops = {
        .read_prop = rt715_sdca_read_prop,
        .update_status = rt715_sdca_update_status,
};

static int rt715_sdca_sdw_probe(struct sdw_slave *slave,
                           const struct sdw_device_id *id)
{
        struct regmap *mbq_regmap, *regmap;

        /* Regmap Initialization */
        mbq_regmap = devm_regmap_init_sdw_mbq(slave, &rt715_sdca_mbq_regmap);
        if (IS_ERR(mbq_regmap))
                return PTR_ERR(mbq_regmap);

        regmap = devm_regmap_init_sdw(slave, &rt715_sdca_regmap);
        if (IS_ERR(regmap))
                return PTR_ERR(regmap);

        return rt715_sdca_init(&slave->dev, mbq_regmap, regmap, slave);
}

static void rt715_sdca_sdw_remove(struct sdw_slave *slave)
{
        pm_runtime_disable(&slave->dev);
}

static const struct sdw_device_id rt715_sdca_id[] = {
        SDW_SLAVE_ENTRY_EXT(0x025d, 0x715, 0x3, 0x1, 0),
        SDW_SLAVE_ENTRY_EXT(0x025d, 0x714, 0x3, 0x1, 0),
        {},
};
MODULE_DEVICE_TABLE(sdw, rt715_sdca_id);

static int rt715_dev_suspend(struct device *dev)
{
        struct rt715_sdca_priv *rt715 = dev_get_drvdata(dev);

        if (!rt715->hw_init)
                return 0;

        regcache_cache_only(rt715->regmap, true);
        regcache_mark_dirty(rt715->regmap);
        regcache_cache_only(rt715->mbq_regmap, true);
        regcache_mark_dirty(rt715->mbq_regmap);

        return 0;
}

#define RT715_PROBE_TIMEOUT 5000

static int rt715_dev_resume(struct device *dev)
{
        struct sdw_slave *slave = dev_to_sdw_dev(dev);
        struct rt715_sdca_priv *rt715 = dev_get_drvdata(dev);
        unsigned long time;

        if (!rt715->first_hw_init)
                return 0;

        if (!slave->unattach_request)
                goto regmap_sync;

        time = wait_for_completion_timeout(&slave->initialization_complete,
                                           msecs_to_jiffies(RT715_PROBE_TIMEOUT));
        if (!time) {
                dev_err(&slave->dev, "%s: Initialization not complete, timed out\n", __func__);
                sdw_show_ping_status(slave->bus, true);

                return -ETIMEDOUT;
        }

regmap_sync:
        slave->unattach_request = 0;
        regcache_cache_only(rt715->regmap, false);
        regcache_sync_region(rt715->regmap,
                SDW_SDCA_CTL(FUN_JACK_CODEC, RT715_SDCA_ST_EN, RT715_SDCA_ST_CTRL,
                        CH_00),
                SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
                        RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00));
        regcache_cache_only(rt715->mbq_regmap, false);
        regcache_sync_region(rt715->mbq_regmap, 0x2000000, 0x61020ff);
        regcache_sync_region(rt715->mbq_regmap,
                SDW_SDCA_CTL(FUN_JACK_CODEC, RT715_SDCA_ST_EN, RT715_SDCA_ST_CTRL,
                        CH_00),
                SDW_SDCA_CTL(FUN_MIC_ARRAY, RT715_SDCA_SMPU_TRIG_ST_EN,
                        RT715_SDCA_SMPU_TRIG_ST_CTRL, CH_00));

        return 0;
}

static const struct dev_pm_ops rt715_pm = {
        SYSTEM_SLEEP_PM_OPS(rt715_dev_suspend, rt715_dev_resume)
        RUNTIME_PM_OPS(rt715_dev_suspend, rt715_dev_resume, NULL)
};

static struct sdw_driver rt715_sdw_driver = {
        .driver = {
                .name = "rt715-sdca",
                .pm = pm_ptr(&rt715_pm),
        },
        .probe = rt715_sdca_sdw_probe,
        .remove = rt715_sdca_sdw_remove,
        .ops = &rt715_sdca_slave_ops,
        .id_table = rt715_sdca_id,
};
module_sdw_driver(rt715_sdw_driver);

MODULE_DESCRIPTION("ASoC RT715 driver SDW SDCA");
MODULE_AUTHOR("Jack Yu <jack.yu@realtek.com>");
MODULE_LICENSE("GPL v2");