// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2016-2018 Linaro Ltd.
 * Copyright (C) 2014 Sony Mobile Communications AB
 * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
 */
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/soc/qcom/mdt_loader.h>
#include "qcom_common.h"
#include "qcom_pil_info.h"
#include "qcom_q6v5.h"

#define WCSS_CRASH_REASON               421

/* Q6SS Register Offsets */
#define Q6SS_RESET_REG          0x014
#define Q6SS_GFMUX_CTL_REG              0x020
#define Q6SS_PWR_CTL_REG                0x030
#define Q6SS_MEM_PWR_CTL                0x0B0
#define Q6SS_STRAP_ACC                  0x110
#define Q6SS_CGC_OVERRIDE               0x034
#define Q6SS_BCR_REG                    0x6000

/* AXI Halt Register Offsets */
#define AXI_HALTREQ_REG                 0x0
#define AXI_HALTACK_REG                 0x4
#define AXI_IDLE_REG                    0x8

#define HALT_ACK_TIMEOUT_MS             100

/* Q6SS_RESET */
#define Q6SS_STOP_CORE                  BIT(0)
#define Q6SS_CORE_ARES                  BIT(1)
#define Q6SS_BUS_ARES_ENABLE            BIT(2)

/* Q6SS_BRC_RESET */
#define Q6SS_BRC_BLK_ARES               BIT(0)

/* Q6SS_GFMUX_CTL */
#define Q6SS_CLK_ENABLE                 BIT(1)
#define Q6SS_SWITCH_CLK_SRC             BIT(8)

/* Q6SS_PWR_CTL */
#define Q6SS_L2DATA_STBY_N              BIT(18)
#define Q6SS_SLP_RET_N                  BIT(19)
#define Q6SS_CLAMP_IO                   BIT(20)
#define QDSS_BHS_ON                     BIT(21)
#define QDSS_Q6_MEMORIES                GENMASK(15, 0)

/* Q6SS parameters */
#define Q6SS_LDO_BYP            BIT(25)
#define Q6SS_BHS_ON             BIT(24)
#define Q6SS_CLAMP_WL           BIT(21)
#define Q6SS_CLAMP_QMC_MEM              BIT(22)
#define HALT_CHECK_MAX_LOOPS            200
#define Q6SS_XO_CBCR            GENMASK(5, 3)
#define Q6SS_SLEEP_CBCR         GENMASK(5, 2)

/* Q6SS config/status registers */
#define TCSR_GLOBAL_CFG0        0x0
#define TCSR_GLOBAL_CFG1        0x4
#define SSCAON_CONFIG           0x8
#define SSCAON_STATUS           0xc
#define Q6SS_BHS_STATUS         0x78
#define Q6SS_RST_EVB            0x10

#define BHS_EN_REST_ACK         BIT(0)
#define SSCAON_ENABLE           BIT(13)
#define SSCAON_BUS_EN           BIT(15)
#define SSCAON_BUS_MUX_MASK     GENMASK(18, 16)

#define MEM_BANKS               19
#define TCSR_WCSS_CLK_MASK      0x1F
#define TCSR_WCSS_CLK_ENABLE    0x14

#define MAX_HALT_REG            3
enum {
        WCSS_IPQ8074,
        WCSS_QCS404,
};

struct wcss_data {
        const char *firmware_name;
        unsigned int crash_reason_smem;
        u32 version;
        bool aon_reset_required;
        bool wcss_q6_reset_required;
        const char *ssr_name;
        const char *sysmon_name;
        int ssctl_id;
        const struct rproc_ops *ops;
        bool requires_force_stop;
};

struct q6v5_wcss {
        struct device *dev;

        void __iomem *reg_base;
        void __iomem *rmb_base;

        struct regmap *halt_map;
        u32 halt_q6;
        u32 halt_wcss;
        u32 halt_nc;

        struct clk *xo;
        struct clk *ahbfabric_cbcr_clk;
        struct clk *gcc_abhs_cbcr;
        struct clk *gcc_axim_cbcr;
        struct clk *lcc_csr_cbcr;
        struct clk *ahbs_cbcr;
        struct clk *tcm_slave_cbcr;
        struct clk *qdsp6ss_abhm_cbcr;
        struct clk *qdsp6ss_sleep_cbcr;
        struct clk *qdsp6ss_axim_cbcr;
        struct clk *qdsp6ss_xo_cbcr;
        struct clk *qdsp6ss_core_gfmux;
        struct clk *lcc_bcr_sleep;
        struct regulator *cx_supply;
        struct qcom_sysmon *sysmon;

        struct reset_control *wcss_aon_reset;
        struct reset_control *wcss_reset;
        struct reset_control *wcss_q6_reset;
        struct reset_control *wcss_q6_bcr_reset;

        struct qcom_q6v5 q6v5;

        phys_addr_t mem_phys;
        phys_addr_t mem_reloc;
        void *mem_region;
        size_t mem_size;

        unsigned int crash_reason_smem;
        u32 version;
        bool requires_force_stop;

        struct qcom_rproc_glink glink_subdev;
        struct qcom_rproc_ssr ssr_subdev;
};

static int q6v5_wcss_reset(struct q6v5_wcss *wcss)
{
        int ret;
        u32 val;
        int i;

        /* Assert resets, stop core */
        val = readl(wcss->reg_base + Q6SS_RESET_REG);
        val |= Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE;
        writel(val, wcss->reg_base + Q6SS_RESET_REG);

        /* BHS require xo cbcr to be enabled */
        val = readl(wcss->reg_base + Q6SS_XO_CBCR);
        val |= 0x1;
        writel(val, wcss->reg_base + Q6SS_XO_CBCR);

        /* Read CLKOFF bit to go low indicating CLK is enabled */
        ret = readl_poll_timeout(wcss->reg_base + Q6SS_XO_CBCR,
                                 val, !(val & BIT(31)), 1,
                                 HALT_CHECK_MAX_LOOPS);
        if (ret) {
                dev_err(wcss->dev,
                        "xo cbcr enabling timed out (rc:%d)\n", ret);
                return ret;
        }
        /* Enable power block headswitch and wait for it to stabilize */
        val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
        val |= Q6SS_BHS_ON;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
        udelay(1);

        /* Put LDO in bypass mode */
        val |= Q6SS_LDO_BYP;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* Deassert Q6 compiler memory clamp */
        val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
        val &= ~Q6SS_CLAMP_QMC_MEM;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* Deassert memory peripheral sleep and L2 memory standby */
        val |= Q6SS_L2DATA_STBY_N | Q6SS_SLP_RET_N;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* Turn on L1, L2, ETB and JU memories 1 at a time */
        val = readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
        for (i = MEM_BANKS; i >= 0; i--) {
                val |= BIT(i);
                writel(val, wcss->reg_base + Q6SS_MEM_PWR_CTL);
                /*
                 * Read back value to ensure the write is done then
                 * wait for 1us for both memory peripheral and data
                 * array to turn on.
                 */
                val |= readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
                udelay(1);
        }
        /* Remove word line clamp */
        val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
        val &= ~Q6SS_CLAMP_WL;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* Remove IO clamp */
        val &= ~Q6SS_CLAMP_IO;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* Bring core out of reset */
        val = readl(wcss->reg_base + Q6SS_RESET_REG);
        val &= ~Q6SS_CORE_ARES;
        writel(val, wcss->reg_base + Q6SS_RESET_REG);

        /* Turn on core clock */
        val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
        val |= Q6SS_CLK_ENABLE;
        writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);

        /* Start core execution */
        val = readl(wcss->reg_base + Q6SS_RESET_REG);
        val &= ~Q6SS_STOP_CORE;
        writel(val, wcss->reg_base + Q6SS_RESET_REG);

        return 0;
}

static int q6v5_wcss_start(struct rproc *rproc)
{
        struct q6v5_wcss *wcss = rproc->priv;
        int ret;

        qcom_q6v5_prepare(&wcss->q6v5);

        /* Release Q6 and WCSS reset */
        ret = reset_control_deassert(wcss->wcss_reset);
        if (ret) {
                dev_err(wcss->dev, "wcss_reset failed\n");
                return ret;
        }

        ret = reset_control_deassert(wcss->wcss_q6_reset);
        if (ret) {
                dev_err(wcss->dev, "wcss_q6_reset failed\n");
                goto wcss_reset;
        }

        /* Lithium configuration - clock gating and bus arbitration */
        ret = regmap_update_bits(wcss->halt_map,
                                 wcss->halt_nc + TCSR_GLOBAL_CFG0,
                                 TCSR_WCSS_CLK_MASK,
                                 TCSR_WCSS_CLK_ENABLE);
        if (ret)
                goto wcss_q6_reset;

        ret = regmap_update_bits(wcss->halt_map,
                                 wcss->halt_nc + TCSR_GLOBAL_CFG1,
                                 1, 0);
        if (ret)
                goto wcss_q6_reset;

        /* Write bootaddr to EVB so that Q6WCSS will jump there after reset */
        writel(rproc->bootaddr >> 4, wcss->reg_base + Q6SS_RST_EVB);

        ret = q6v5_wcss_reset(wcss);
        if (ret)
                goto wcss_q6_reset;

        ret = qcom_q6v5_wait_for_start(&wcss->q6v5, 5 * HZ);
        if (ret == -ETIMEDOUT)
                dev_err(wcss->dev, "start timed out\n");

        return ret;

wcss_q6_reset:
        reset_control_assert(wcss->wcss_q6_reset);

wcss_reset:
        reset_control_assert(wcss->wcss_reset);

        return ret;
}

static int q6v5_wcss_qcs404_power_on(struct q6v5_wcss *wcss)
{
        unsigned long val;
        int ret, idx;

        /* Toggle the restart */
        reset_control_assert(wcss->wcss_reset);
        usleep_range(200, 300);
        reset_control_deassert(wcss->wcss_reset);
        usleep_range(200, 300);

        /* Enable GCC_WDSP_Q6SS_AHBS_CBCR clock */
        ret = clk_prepare_enable(wcss->gcc_abhs_cbcr);
        if (ret)
                return ret;

        /* Remove reset to the WCNSS QDSP6SS */
        reset_control_deassert(wcss->wcss_q6_bcr_reset);

        /* Enable Q6SSTOP_AHBFABRIC_CBCR clock */
        ret = clk_prepare_enable(wcss->ahbfabric_cbcr_clk);
        if (ret)
                goto disable_gcc_abhs_cbcr_clk;

        /* Enable the LCCCSR CBC clock, Q6SSTOP_Q6SSTOP_LCC_CSR_CBCR clock */
        ret = clk_prepare_enable(wcss->lcc_csr_cbcr);
        if (ret)
                goto disable_ahbfabric_cbcr_clk;

        /* Enable the Q6AHBS CBC, Q6SSTOP_Q6SS_AHBS_CBCR clock */
        ret = clk_prepare_enable(wcss->ahbs_cbcr);
        if (ret)
                goto disable_csr_cbcr_clk;

        /* Enable the TCM slave CBC, Q6SSTOP_Q6SS_TCM_SLAVE_CBCR clock */
        ret = clk_prepare_enable(wcss->tcm_slave_cbcr);
        if (ret)
                goto disable_ahbs_cbcr_clk;

        /* Enable the Q6SS AHB master CBC, Q6SSTOP_Q6SS_AHBM_CBCR clock */
        ret = clk_prepare_enable(wcss->qdsp6ss_abhm_cbcr);
        if (ret)
                goto disable_tcm_slave_cbcr_clk;

        /* Enable the Q6SS AXI master CBC, Q6SSTOP_Q6SS_AXIM_CBCR clock */
        ret = clk_prepare_enable(wcss->qdsp6ss_axim_cbcr);
        if (ret)
                goto disable_abhm_cbcr_clk;

        /* Enable the Q6SS XO CBC */
        val = readl(wcss->reg_base + Q6SS_XO_CBCR);
        val |= BIT(0);
        writel(val, wcss->reg_base + Q6SS_XO_CBCR);
        /* Read CLKOFF bit to go low indicating CLK is enabled */
        ret = readl_poll_timeout(wcss->reg_base + Q6SS_XO_CBCR,
                                 val, !(val & BIT(31)), 1,
                                 HALT_CHECK_MAX_LOOPS);
        if (ret) {
                dev_err(wcss->dev,
                        "xo cbcr enabling timed out (rc:%d)\n", ret);
                return ret;
        }

        writel(0, wcss->reg_base + Q6SS_CGC_OVERRIDE);

        /* Enable QDSP6 sleep clock clock */
        val = readl(wcss->reg_base + Q6SS_SLEEP_CBCR);
        val |= BIT(0);
        writel(val, wcss->reg_base + Q6SS_SLEEP_CBCR);

        /* Enable the Enable the Q6 AXI clock, GCC_WDSP_Q6SS_AXIM_CBCR*/
        ret = clk_prepare_enable(wcss->gcc_axim_cbcr);
        if (ret)
                goto disable_sleep_cbcr_clk;

        /* Assert resets, stop core */
        val = readl(wcss->reg_base + Q6SS_RESET_REG);
        val |= Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE;
        writel(val, wcss->reg_base + Q6SS_RESET_REG);

        /* Program the QDSP6SS PWR_CTL register */
        writel(0x01700000, wcss->reg_base + Q6SS_PWR_CTL_REG);

        writel(0x03700000, wcss->reg_base + Q6SS_PWR_CTL_REG);

        writel(0x03300000, wcss->reg_base + Q6SS_PWR_CTL_REG);

        writel(0x033C0000, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /*
         * Enable memories by turning on the QDSP6 memory foot/head switch, one
         * bank at a time to avoid in-rush current
         */
        for (idx = 28; idx >= 0; idx--) {
                writel((readl(wcss->reg_base + Q6SS_MEM_PWR_CTL) |
                        (1 << idx)), wcss->reg_base + Q6SS_MEM_PWR_CTL);
        }

        writel(0x031C0000, wcss->reg_base + Q6SS_PWR_CTL_REG);
        writel(0x030C0000, wcss->reg_base + Q6SS_PWR_CTL_REG);

        val = readl(wcss->reg_base + Q6SS_RESET_REG);
        val &= ~Q6SS_CORE_ARES;
        writel(val, wcss->reg_base + Q6SS_RESET_REG);

        /* Enable the Q6 core clock at the GFM, Q6SSTOP_QDSP6SS_GFMUX_CTL */
        val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
        val |= Q6SS_CLK_ENABLE | Q6SS_SWITCH_CLK_SRC;
        writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);

        /* Enable sleep clock branch needed for BCR circuit */
        ret = clk_prepare_enable(wcss->lcc_bcr_sleep);
        if (ret)
                goto disable_core_gfmux_clk;

        return 0;

disable_core_gfmux_clk:
        val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
        val &= ~(Q6SS_CLK_ENABLE | Q6SS_SWITCH_CLK_SRC);
        writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);
        clk_disable_unprepare(wcss->gcc_axim_cbcr);
disable_sleep_cbcr_clk:
        val = readl(wcss->reg_base + Q6SS_SLEEP_CBCR);
        val &= ~Q6SS_CLK_ENABLE;
        writel(val, wcss->reg_base + Q6SS_SLEEP_CBCR);
        val = readl(wcss->reg_base + Q6SS_XO_CBCR);
        val &= ~Q6SS_CLK_ENABLE;
        writel(val, wcss->reg_base + Q6SS_XO_CBCR);
        clk_disable_unprepare(wcss->qdsp6ss_axim_cbcr);
disable_abhm_cbcr_clk:
        clk_disable_unprepare(wcss->qdsp6ss_abhm_cbcr);
disable_tcm_slave_cbcr_clk:
        clk_disable_unprepare(wcss->tcm_slave_cbcr);
disable_ahbs_cbcr_clk:
        clk_disable_unprepare(wcss->ahbs_cbcr);
disable_csr_cbcr_clk:
        clk_disable_unprepare(wcss->lcc_csr_cbcr);
disable_ahbfabric_cbcr_clk:
        clk_disable_unprepare(wcss->ahbfabric_cbcr_clk);
disable_gcc_abhs_cbcr_clk:
        clk_disable_unprepare(wcss->gcc_abhs_cbcr);

        return ret;
}

static inline int q6v5_wcss_qcs404_reset(struct q6v5_wcss *wcss)
{
        unsigned long val;

        writel(0x80800000, wcss->reg_base + Q6SS_STRAP_ACC);

        /* Start core execution */
        val = readl(wcss->reg_base + Q6SS_RESET_REG);
        val &= ~Q6SS_STOP_CORE;
        writel(val, wcss->reg_base + Q6SS_RESET_REG);

        return 0;
}

static int q6v5_qcs404_wcss_start(struct rproc *rproc)
{
        struct q6v5_wcss *wcss = rproc->priv;
        int ret;

        ret = clk_prepare_enable(wcss->xo);
        if (ret)
                return ret;

        ret = regulator_enable(wcss->cx_supply);
        if (ret)
                goto disable_xo_clk;

        qcom_q6v5_prepare(&wcss->q6v5);

        ret = q6v5_wcss_qcs404_power_on(wcss);
        if (ret) {
                dev_err(wcss->dev, "wcss clk_enable failed\n");
                goto disable_cx_supply;
        }

        writel(rproc->bootaddr >> 4, wcss->reg_base + Q6SS_RST_EVB);

        q6v5_wcss_qcs404_reset(wcss);

        ret = qcom_q6v5_wait_for_start(&wcss->q6v5, 5 * HZ);
        if (ret == -ETIMEDOUT) {
                dev_err(wcss->dev, "start timed out\n");
                goto disable_cx_supply;
        }

        return 0;

disable_cx_supply:
        regulator_disable(wcss->cx_supply);
disable_xo_clk:
        clk_disable_unprepare(wcss->xo);

        return ret;
}

static void q6v5_wcss_halt_axi_port(struct q6v5_wcss *wcss,
                                    struct regmap *halt_map,
                                    u32 offset)
{
        unsigned long timeout;
        unsigned int val;
        int ret;

        /* Check if we're already idle */
        ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
        if (!ret && val)
                return;

        /* Assert halt request */
        regmap_write(halt_map, offset + AXI_HALTREQ_REG, 1);

        /* Wait for halt */
        timeout = jiffies + msecs_to_jiffies(HALT_ACK_TIMEOUT_MS);
        for (;;) {
                ret = regmap_read(halt_map, offset + AXI_HALTACK_REG, &val);
                if (ret || val || time_after(jiffies, timeout))
                        break;

                msleep(1);
        }

        ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
        if (ret || !val)
                dev_err(wcss->dev, "port failed halt\n");

        /* Clear halt request (port will remain halted until reset) */
        regmap_write(halt_map, offset + AXI_HALTREQ_REG, 0);
}

static int q6v5_qcs404_wcss_shutdown(struct q6v5_wcss *wcss)
{
        unsigned long val;
        int ret;

        q6v5_wcss_halt_axi_port(wcss, wcss->halt_map, wcss->halt_wcss);

        /* assert clamps to avoid MX current inrush */
        val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
        val |= (Q6SS_CLAMP_IO | Q6SS_CLAMP_WL | Q6SS_CLAMP_QMC_MEM);
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* Disable memories by turning off memory foot/headswitch */
        writel((readl(wcss->reg_base + Q6SS_MEM_PWR_CTL) &
                ~QDSS_Q6_MEMORIES),
                wcss->reg_base + Q6SS_MEM_PWR_CTL);

        /* Clear the BHS_ON bit */
        val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
        val &= ~Q6SS_BHS_ON;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        clk_disable_unprepare(wcss->ahbfabric_cbcr_clk);
        clk_disable_unprepare(wcss->lcc_csr_cbcr);
        clk_disable_unprepare(wcss->tcm_slave_cbcr);
        clk_disable_unprepare(wcss->qdsp6ss_abhm_cbcr);
        clk_disable_unprepare(wcss->qdsp6ss_axim_cbcr);

        val = readl(wcss->reg_base + Q6SS_SLEEP_CBCR);
        val &= ~BIT(0);
        writel(val, wcss->reg_base + Q6SS_SLEEP_CBCR);

        val = readl(wcss->reg_base + Q6SS_XO_CBCR);
        val &= ~BIT(0);
        writel(val, wcss->reg_base + Q6SS_XO_CBCR);

        clk_disable_unprepare(wcss->ahbs_cbcr);
        clk_disable_unprepare(wcss->lcc_bcr_sleep);

        val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
        val &= ~(Q6SS_CLK_ENABLE | Q6SS_SWITCH_CLK_SRC);
        writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);

        clk_disable_unprepare(wcss->gcc_abhs_cbcr);

        ret = reset_control_assert(wcss->wcss_reset);
        if (ret) {
                dev_err(wcss->dev, "wcss_reset failed\n");
                return ret;
        }
        usleep_range(200, 300);

        ret = reset_control_deassert(wcss->wcss_reset);
        if (ret) {
                dev_err(wcss->dev, "wcss_reset failed\n");
                return ret;
        }
        usleep_range(200, 300);

        clk_disable_unprepare(wcss->gcc_axim_cbcr);

        return 0;
}

static int q6v5_wcss_powerdown(struct q6v5_wcss *wcss)
{
        int ret;
        u32 val;

        /* 1 - Assert WCSS/Q6 HALTREQ */
        q6v5_wcss_halt_axi_port(wcss, wcss->halt_map, wcss->halt_wcss);

        /* 2 - Enable WCSSAON_CONFIG */
        val = readl(wcss->rmb_base + SSCAON_CONFIG);
        val |= SSCAON_ENABLE;
        writel(val, wcss->rmb_base + SSCAON_CONFIG);

        /* 3 - Set SSCAON_CONFIG */
        val |= SSCAON_BUS_EN;
        val &= ~SSCAON_BUS_MUX_MASK;
        writel(val, wcss->rmb_base + SSCAON_CONFIG);

        /* 4 - SSCAON_CONFIG 1 */
        val |= BIT(1);
        writel(val, wcss->rmb_base + SSCAON_CONFIG);

        /* 5 - wait for SSCAON_STATUS */
        ret = readl_poll_timeout(wcss->rmb_base + SSCAON_STATUS,
                                 val, (val & 0xffff) == 0x400, 1000,
                                 HALT_CHECK_MAX_LOOPS);
        if (ret) {
                dev_err(wcss->dev,
                        "can't get SSCAON_STATUS rc:%d)\n", ret);
                return ret;
        }

        /* 6 - De-assert WCSS_AON reset */
        reset_control_assert(wcss->wcss_aon_reset);

        /* 7 - Disable WCSSAON_CONFIG 13 */
        val = readl(wcss->rmb_base + SSCAON_CONFIG);
        val &= ~SSCAON_ENABLE;
        writel(val, wcss->rmb_base + SSCAON_CONFIG);

        /* 8 - De-assert WCSS/Q6 HALTREQ */
        reset_control_assert(wcss->wcss_reset);

        return 0;
}

static int q6v5_q6_powerdown(struct q6v5_wcss *wcss)
{
        int ret;
        u32 val;
        int i;

        /* 1 - Halt Q6 bus interface */
        q6v5_wcss_halt_axi_port(wcss, wcss->halt_map, wcss->halt_q6);

        /* 2 - Disable Q6 Core clock */
        val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
        val &= ~Q6SS_CLK_ENABLE;
        writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);

        /* 3 - Clamp I/O */
        val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
        val |= Q6SS_CLAMP_IO;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* 4 - Clamp WL */
        val |= QDSS_BHS_ON;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* 5 - Clear Erase standby */
        val &= ~Q6SS_L2DATA_STBY_N;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* 6 - Clear Sleep RTN */
        val &= ~Q6SS_SLP_RET_N;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* 7 - turn off Q6 memory foot/head switch one bank at a time */
        for (i = 0; i < 20; i++) {
                val = readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
                val &= ~BIT(i);
                writel(val, wcss->reg_base + Q6SS_MEM_PWR_CTL);
                mdelay(1);
        }

        /* 8 - Assert QMC memory RTN */
        val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
        val |= Q6SS_CLAMP_QMC_MEM;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);

        /* 9 - Turn off BHS */
        val &= ~Q6SS_BHS_ON;
        writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
        udelay(1);

        /* 10 - Wait till BHS Reset is done */
        ret = readl_poll_timeout(wcss->reg_base + Q6SS_BHS_STATUS,
                                 val, !(val & BHS_EN_REST_ACK), 1000,
                                 HALT_CHECK_MAX_LOOPS);
        if (ret) {
                dev_err(wcss->dev, "BHS_STATUS not OFF (rc:%d)\n", ret);
                return ret;
        }

        /* 11 -  Assert WCSS reset */
        reset_control_assert(wcss->wcss_reset);

        /* 12 - Assert Q6 reset */
        reset_control_assert(wcss->wcss_q6_reset);

        return 0;
}

static int q6v5_wcss_stop(struct rproc *rproc)
{
        struct q6v5_wcss *wcss = rproc->priv;
        int ret;

        /* WCSS powerdown */
        if (wcss->requires_force_stop) {
                ret = qcom_q6v5_request_stop(&wcss->q6v5, NULL);
                if (ret == -ETIMEDOUT) {
                        dev_err(wcss->dev, "timed out on wait\n");
                        return ret;
                }
        }

        if (wcss->version == WCSS_QCS404) {
                ret = q6v5_qcs404_wcss_shutdown(wcss);
                if (ret)
                        return ret;
        } else {
                ret = q6v5_wcss_powerdown(wcss);
                if (ret)
                        return ret;

                /* Q6 Power down */
                ret = q6v5_q6_powerdown(wcss);
                if (ret)
                        return ret;
        }

        qcom_q6v5_unprepare(&wcss->q6v5);

        return 0;
}

static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
{
        struct q6v5_wcss *wcss = rproc->priv;
        int offset;

        offset = da - wcss->mem_reloc;
        if (offset < 0 || offset + len > wcss->mem_size)
                return NULL;

        return wcss->mem_region + offset;
}

static int q6v5_wcss_load(struct rproc *rproc, const struct firmware *fw)
{
        struct q6v5_wcss *wcss = rproc->priv;
        int ret;

        ret = qcom_mdt_load_no_init(wcss->dev, fw, rproc->firmware,
                                    0, wcss->mem_region, wcss->mem_phys,
                                    wcss->mem_size, &wcss->mem_reloc);
        if (ret)
                return ret;

        qcom_pil_info_store("wcnss", wcss->mem_phys, wcss->mem_size);

        return ret;
}

static const struct rproc_ops q6v5_wcss_ipq8074_ops = {
        .start = q6v5_wcss_start,
        .stop = q6v5_wcss_stop,
        .da_to_va = q6v5_wcss_da_to_va,
        .load = q6v5_wcss_load,
        .get_boot_addr = rproc_elf_get_boot_addr,
};

static const struct rproc_ops q6v5_wcss_qcs404_ops = {
        .start = q6v5_qcs404_wcss_start,
        .stop = q6v5_wcss_stop,
        .da_to_va = q6v5_wcss_da_to_va,
        .load = q6v5_wcss_load,
        .get_boot_addr = rproc_elf_get_boot_addr,
        .parse_fw = qcom_register_dump_segments,
};

static int q6v5_wcss_init_reset(struct q6v5_wcss *wcss,
                                const struct wcss_data *desc)
{
        struct device *dev = wcss->dev;

        if (desc->aon_reset_required) {
                wcss->wcss_aon_reset = devm_reset_control_get_exclusive(dev, "wcss_aon_reset");
                if (IS_ERR(wcss->wcss_aon_reset)) {
                        dev_err(wcss->dev, "fail to acquire wcss_aon_reset\n");
                        return PTR_ERR(wcss->wcss_aon_reset);
                }
        }

        wcss->wcss_reset = devm_reset_control_get_exclusive(dev, "wcss_reset");
        if (IS_ERR(wcss->wcss_reset)) {
                dev_err(wcss->dev, "unable to acquire wcss_reset\n");
                return PTR_ERR(wcss->wcss_reset);
        }

        if (desc->wcss_q6_reset_required) {
                wcss->wcss_q6_reset = devm_reset_control_get_exclusive(dev, "wcss_q6_reset");
                if (IS_ERR(wcss->wcss_q6_reset)) {
                        dev_err(wcss->dev, "unable to acquire wcss_q6_reset\n");
                        return PTR_ERR(wcss->wcss_q6_reset);
                }
        }

        wcss->wcss_q6_bcr_reset = devm_reset_control_get_exclusive(dev, "wcss_q6_bcr_reset");
        if (IS_ERR(wcss->wcss_q6_bcr_reset)) {
                dev_err(wcss->dev, "unable to acquire wcss_q6_bcr_reset\n");
                return PTR_ERR(wcss->wcss_q6_bcr_reset);
        }

        return 0;
}

static int q6v5_wcss_init_mmio(struct q6v5_wcss *wcss,
                               struct platform_device *pdev)
{
        unsigned int halt_reg[MAX_HALT_REG] = {0};
        struct device_node *syscon;
        struct resource *res;
        int ret;

        res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6");
        wcss->reg_base = devm_ioremap(&pdev->dev, res->start,
                                      resource_size(res));
        if (!wcss->reg_base)
                return -ENOMEM;

        if (wcss->version == WCSS_IPQ8074) {
                res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rmb");
                wcss->rmb_base = devm_ioremap_resource(&pdev->dev, res);
                if (IS_ERR(wcss->rmb_base))
                        return PTR_ERR(wcss->rmb_base);
        }

        syscon = of_parse_phandle(pdev->dev.of_node,
                                  "qcom,halt-regs", 0);
        if (!syscon) {
                dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
                return -EINVAL;
        }

        wcss->halt_map = syscon_node_to_regmap(syscon);
        of_node_put(syscon);
        if (IS_ERR(wcss->halt_map))
                return PTR_ERR(wcss->halt_map);

        ret = of_property_read_variable_u32_array(pdev->dev.of_node,
                                                  "qcom,halt-regs",
                                                  halt_reg, 0,
                                                  MAX_HALT_REG);
        if (ret < 0) {
                dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
                return -EINVAL;
        }

        wcss->halt_q6 = halt_reg[0];
        wcss->halt_wcss = halt_reg[1];
        wcss->halt_nc = halt_reg[2];

        return 0;
}

static int q6v5_alloc_memory_region(struct q6v5_wcss *wcss)
{
        struct reserved_mem *rmem = NULL;
        struct device_node *node;
        struct device *dev = wcss->dev;

        node = of_parse_phandle(dev->of_node, "memory-region", 0);
        if (node)
                rmem = of_reserved_mem_lookup(node);
        of_node_put(node);

        if (!rmem) {
                dev_err(dev, "unable to acquire memory-region\n");
                return -EINVAL;
        }

        wcss->mem_phys = rmem->base;
        wcss->mem_reloc = rmem->base;
        wcss->mem_size = rmem->size;
        wcss->mem_region = devm_ioremap_wc(dev, wcss->mem_phys, wcss->mem_size);
        if (!wcss->mem_region) {
                dev_err(dev, "unable to map memory region: %pa+%pa\n",
                        &rmem->base, &rmem->size);
                return -EBUSY;
        }

        return 0;
}

static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
{
        int ret;

        wcss->xo = devm_clk_get(wcss->dev, "xo");
        if (IS_ERR(wcss->xo)) {
                ret = PTR_ERR(wcss->xo);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get xo clock");
                return ret;
        }

        wcss->gcc_abhs_cbcr = devm_clk_get(wcss->dev, "gcc_abhs_cbcr");
        if (IS_ERR(wcss->gcc_abhs_cbcr)) {
                ret = PTR_ERR(wcss->gcc_abhs_cbcr);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get gcc abhs clock");
                return ret;
        }

        wcss->gcc_axim_cbcr = devm_clk_get(wcss->dev, "gcc_axim_cbcr");
        if (IS_ERR(wcss->gcc_axim_cbcr)) {
                ret = PTR_ERR(wcss->gcc_axim_cbcr);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get gcc axim clock\n");
                return ret;
        }

        wcss->ahbfabric_cbcr_clk = devm_clk_get(wcss->dev,
                                                "lcc_ahbfabric_cbc");
        if (IS_ERR(wcss->ahbfabric_cbcr_clk)) {
                ret = PTR_ERR(wcss->ahbfabric_cbcr_clk);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get ahbfabric clock\n");
                return ret;
        }

        wcss->lcc_csr_cbcr = devm_clk_get(wcss->dev, "tcsr_lcc_cbc");
        if (IS_ERR(wcss->lcc_csr_cbcr)) {
                ret = PTR_ERR(wcss->lcc_csr_cbcr);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get csr cbcr clk\n");
                return ret;
        }

        wcss->ahbs_cbcr = devm_clk_get(wcss->dev,
                                       "lcc_abhs_cbc");
        if (IS_ERR(wcss->ahbs_cbcr)) {
                ret = PTR_ERR(wcss->ahbs_cbcr);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get ahbs_cbcr clk\n");
                return ret;
        }

        wcss->tcm_slave_cbcr = devm_clk_get(wcss->dev,
                                            "lcc_tcm_slave_cbc");
        if (IS_ERR(wcss->tcm_slave_cbcr)) {
                ret = PTR_ERR(wcss->tcm_slave_cbcr);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get tcm cbcr clk\n");
                return ret;
        }

        wcss->qdsp6ss_abhm_cbcr = devm_clk_get(wcss->dev, "lcc_abhm_cbc");
        if (IS_ERR(wcss->qdsp6ss_abhm_cbcr)) {
                ret = PTR_ERR(wcss->qdsp6ss_abhm_cbcr);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get abhm cbcr clk\n");
                return ret;
        }

        wcss->qdsp6ss_axim_cbcr = devm_clk_get(wcss->dev, "lcc_axim_cbc");
        if (IS_ERR(wcss->qdsp6ss_axim_cbcr)) {
                ret = PTR_ERR(wcss->qdsp6ss_axim_cbcr);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get axim cbcr clk\n");
                return ret;
        }

        wcss->lcc_bcr_sleep = devm_clk_get(wcss->dev, "lcc_bcr_sleep");
        if (IS_ERR(wcss->lcc_bcr_sleep)) {
                ret = PTR_ERR(wcss->lcc_bcr_sleep);
                if (ret != -EPROBE_DEFER)
                        dev_err(wcss->dev, "failed to get bcr cbcr clk\n");
                return ret;
        }

        return 0;
}

static int q6v5_wcss_init_regulator(struct q6v5_wcss *wcss)
{
        wcss->cx_supply = devm_regulator_get(wcss->dev, "cx");
        if (IS_ERR(wcss->cx_supply))
                return PTR_ERR(wcss->cx_supply);

        regulator_set_load(wcss->cx_supply, 100000);

        return 0;
}

static int q6v5_wcss_probe(struct platform_device *pdev)

{
        const struct wcss_data *desc;
        struct q6v5_wcss *wcss;
        struct rproc *rproc;
        int ret;

        desc = device_get_match_data(&pdev->dev);
        if (!desc)
                return -EINVAL;

        rproc = rproc_alloc(&pdev->dev, pdev->name, desc->ops,
                            desc->firmware_name, sizeof(*wcss));
        if (!rproc) {
                dev_err(&pdev->dev, "failed to allocate rproc\n");
                return -ENOMEM;
        }

        wcss = rproc->priv;
        wcss->dev = &pdev->dev;
        wcss->version = desc->version;

        wcss->version = desc->version;
        wcss->requires_force_stop = desc->requires_force_stop;

        ret = q6v5_wcss_init_mmio(wcss, pdev);
        if (ret)
                goto free_rproc;

        ret = q6v5_alloc_memory_region(wcss);
        if (ret)
                goto free_rproc;

        if (wcss->version == WCSS_QCS404) {
                ret = q6v5_wcss_init_clock(wcss);
                if (ret)
                        goto free_rproc;

                ret = q6v5_wcss_init_regulator(wcss);
                if (ret)
                        goto free_rproc;
        }

        ret = q6v5_wcss_init_reset(wcss, desc);
        if (ret)
                goto free_rproc;

        ret = qcom_q6v5_init(&wcss->q6v5, pdev, rproc, desc->crash_reason_smem,
                             NULL);
        if (ret)
                goto free_rproc;

        qcom_add_glink_subdev(rproc, &wcss->glink_subdev, "q6wcss");
        qcom_add_ssr_subdev(rproc, &wcss->ssr_subdev, "q6wcss");

        if (desc->ssctl_id)
                wcss->sysmon = qcom_add_sysmon_subdev(rproc,
                                                      desc->sysmon_name,
                                                      desc->ssctl_id);

        ret = rproc_add(rproc);
        if (ret)
                goto free_rproc;

        platform_set_drvdata(pdev, rproc);

        return 0;

free_rproc:
        rproc_free(rproc);

        return ret;
}

static int q6v5_wcss_remove(struct platform_device *pdev)
{
        struct rproc *rproc = platform_get_drvdata(pdev);

        rproc_del(rproc);
        rproc_free(rproc);

        return 0;
}

static const struct wcss_data wcss_ipq8074_res_init = {
        .firmware_name = "IPQ8074/q6_fw.mdt",
        .crash_reason_smem = WCSS_CRASH_REASON,
        .aon_reset_required = true,
        .wcss_q6_reset_required = true,
        .ops = &q6v5_wcss_ipq8074_ops,
        .requires_force_stop = true,
};

static const struct wcss_data wcss_qcs404_res_init = {
        .crash_reason_smem = WCSS_CRASH_REASON,
        .firmware_name = "wcnss.mdt",
        .version = WCSS_QCS404,
        .aon_reset_required = false,
        .wcss_q6_reset_required = false,
        .ssr_name = "mpss",
        .sysmon_name = "wcnss",
        .ssctl_id = 0x12,
        .ops = &q6v5_wcss_qcs404_ops,
        .requires_force_stop = false,
};

static const struct of_device_id q6v5_wcss_of_match[] = {
        { .compatible = "qcom,ipq8074-wcss-pil", .data = &wcss_ipq8074_res_init },
        { .compatible = "qcom,qcs404-wcss-pil", .data = &wcss_qcs404_res_init },
        { },
};
MODULE_DEVICE_TABLE(of, q6v5_wcss_of_match);

static struct platform_driver q6v5_wcss_driver = {
        .probe = q6v5_wcss_probe,
        .remove = q6v5_wcss_remove,
        .driver = {
                .name = "qcom-q6v5-wcss-pil",
                .of_match_table = q6v5_wcss_of_match,
        },
};
module_platform_driver(q6v5_wcss_driver);

MODULE_DESCRIPTION("Hexagon WCSS Peripheral Image Loader");
MODULE_LICENSE("GPL v2");