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linux/drivers/soc/mediatek/mtk-pmic-wrap.c
Henry Chen 73efe5792b soc: mediatek: PMIC wrap: Clear the vldclr if state machine stay on FSM_VLDCLR state. 
Sometimes PMIC is too busy to send data in time to cause pmic wrap timeout,
because pmic wrap is waiting for FSM_VLDCLR after finishing WACS2_CMD. It
just return error when issue happened, so the state machine will stay on
FSM_VLDCLR state when data send back later by PMIC and timeout again in next
time because pmic wrap waiting for FSM_IDLE state at the beginning of the
read/write function.

Clear the vldclr when timeout if state machine stay on FSM_VLDCLR.

Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
Tested-by: Ricky Liang <jcliang@chromium.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
2016-01-25 18:59:41 +01:00

959 lines
24 KiB
C
Raw Blame History

/*
* Copyright (c) 2014 MediaTek Inc.
* Author: Flora Fu, MediaTek
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#define PWRAP_MT8135_BRIDGE_IORD_ARB_EN 0x4
#define PWRAP_MT8135_BRIDGE_WACS3_EN 0x10
#define PWRAP_MT8135_BRIDGE_INIT_DONE3 0x14
#define PWRAP_MT8135_BRIDGE_WACS4_EN 0x24
#define PWRAP_MT8135_BRIDGE_INIT_DONE4 0x28
#define PWRAP_MT8135_BRIDGE_INT_EN 0x38
#define PWRAP_MT8135_BRIDGE_TIMER_EN 0x48
#define PWRAP_MT8135_BRIDGE_WDT_UNIT 0x50
#define PWRAP_MT8135_BRIDGE_WDT_SRC_EN 0x54
/* macro for wrapper status */
#define PWRAP_GET_WACS_RDATA(x) (((x) >> 0) & 0x0000ffff)
#define PWRAP_GET_WACS_FSM(x) (((x) >> 16) & 0x00000007)
#define PWRAP_GET_WACS_REQ(x) (((x) >> 19) & 0x00000001)
#define PWRAP_STATE_SYNC_IDLE0 (1 << 20)
#define PWRAP_STATE_INIT_DONE0 (1 << 21)
/* macro for WACS FSM */
#define PWRAP_WACS_FSM_IDLE 0x00
#define PWRAP_WACS_FSM_REQ 0x02
#define PWRAP_WACS_FSM_WFDLE 0x04
#define PWRAP_WACS_FSM_WFVLDCLR 0x06
#define PWRAP_WACS_INIT_DONE 0x01
#define PWRAP_WACS_WACS_SYNC_IDLE 0x01
#define PWRAP_WACS_SYNC_BUSY 0x00
/* macro for device wrapper default value */
#define PWRAP_DEW_READ_TEST_VAL 0x5aa5
#define PWRAP_DEW_WRITE_TEST_VAL 0xa55a
/* macro for manual command */
#define PWRAP_MAN_CMD_SPI_WRITE (1 << 13)
#define PWRAP_MAN_CMD_OP_CSH (0x0 << 8)
#define PWRAP_MAN_CMD_OP_CSL (0x1 << 8)
#define PWRAP_MAN_CMD_OP_CK (0x2 << 8)
#define PWRAP_MAN_CMD_OP_OUTS (0x8 << 8)
#define PWRAP_MAN_CMD_OP_OUTD (0x9 << 8)
#define PWRAP_MAN_CMD_OP_OUTQ (0xa << 8)
/* macro for slave device wrapper registers */
#define PWRAP_DEW_BASE 0xbc00
#define PWRAP_DEW_EVENT_OUT_EN (PWRAP_DEW_BASE + 0x0)
#define PWRAP_DEW_DIO_EN (PWRAP_DEW_BASE + 0x2)
#define PWRAP_DEW_EVENT_SRC_EN (PWRAP_DEW_BASE + 0x4)
#define PWRAP_DEW_EVENT_SRC (PWRAP_DEW_BASE + 0x6)
#define PWRAP_DEW_EVENT_FLAG (PWRAP_DEW_BASE + 0x8)
#define PWRAP_DEW_READ_TEST (PWRAP_DEW_BASE + 0xa)
#define PWRAP_DEW_WRITE_TEST (PWRAP_DEW_BASE + 0xc)
#define PWRAP_DEW_CRC_EN (PWRAP_DEW_BASE + 0xe)
#define PWRAP_DEW_CRC_VAL (PWRAP_DEW_BASE + 0x10)
#define PWRAP_DEW_MON_GRP_SEL (PWRAP_DEW_BASE + 0x12)
#define PWRAP_DEW_MON_FLAG_SEL (PWRAP_DEW_BASE + 0x14)
#define PWRAP_DEW_EVENT_TEST (PWRAP_DEW_BASE + 0x16)
#define PWRAP_DEW_CIPHER_KEY_SEL (PWRAP_DEW_BASE + 0x18)
#define PWRAP_DEW_CIPHER_IV_SEL (PWRAP_DEW_BASE + 0x1a)
#define PWRAP_DEW_CIPHER_LOAD (PWRAP_DEW_BASE + 0x1c)
#define PWRAP_DEW_CIPHER_START (PWRAP_DEW_BASE + 0x1e)
#define PWRAP_DEW_CIPHER_RDY (PWRAP_DEW_BASE + 0x20)
#define PWRAP_DEW_CIPHER_MODE (PWRAP_DEW_BASE + 0x22)
#define PWRAP_DEW_CIPHER_SWRST (PWRAP_DEW_BASE + 0x24)
#define PWRAP_MT8173_DEW_CIPHER_IV0 (PWRAP_DEW_BASE + 0x26)
#define PWRAP_MT8173_DEW_CIPHER_IV1 (PWRAP_DEW_BASE + 0x28)
#define PWRAP_MT8173_DEW_CIPHER_IV2 (PWRAP_DEW_BASE + 0x2a)
#define PWRAP_MT8173_DEW_CIPHER_IV3 (PWRAP_DEW_BASE + 0x2c)
#define PWRAP_MT8173_DEW_CIPHER_IV4 (PWRAP_DEW_BASE + 0x2e)
#define PWRAP_MT8173_DEW_CIPHER_IV5 (PWRAP_DEW_BASE + 0x30)
enum pwrap_regs {
PWRAP_MUX_SEL,
PWRAP_WRAP_EN,
PWRAP_DIO_EN,
PWRAP_SIDLY,
PWRAP_CSHEXT_WRITE,
PWRAP_CSHEXT_READ,
PWRAP_CSLEXT_START,
PWRAP_CSLEXT_END,
PWRAP_STAUPD_PRD,
PWRAP_STAUPD_GRPEN,
PWRAP_STAUPD_MAN_TRIG,
PWRAP_STAUPD_STA,
PWRAP_WRAP_STA,
PWRAP_HARB_INIT,
PWRAP_HARB_HPRIO,
PWRAP_HIPRIO_ARB_EN,
PWRAP_HARB_STA0,
PWRAP_HARB_STA1,
PWRAP_MAN_EN,
PWRAP_MAN_CMD,
PWRAP_MAN_RDATA,
PWRAP_MAN_VLDCLR,
PWRAP_WACS0_EN,
PWRAP_INIT_DONE0,
PWRAP_WACS0_CMD,
PWRAP_WACS0_RDATA,
PWRAP_WACS0_VLDCLR,
PWRAP_WACS1_EN,
PWRAP_INIT_DONE1,
PWRAP_WACS1_CMD,
PWRAP_WACS1_RDATA,
PWRAP_WACS1_VLDCLR,
PWRAP_WACS2_EN,
PWRAP_INIT_DONE2,
PWRAP_WACS2_CMD,
PWRAP_WACS2_RDATA,
PWRAP_WACS2_VLDCLR,
PWRAP_INT_EN,
PWRAP_INT_FLG_RAW,
PWRAP_INT_FLG,
PWRAP_INT_CLR,
PWRAP_SIG_ADR,
PWRAP_SIG_MODE,
PWRAP_SIG_VALUE,
PWRAP_SIG_ERRVAL,
PWRAP_CRC_EN,
PWRAP_TIMER_EN,
PWRAP_TIMER_STA,
PWRAP_WDT_UNIT,
PWRAP_WDT_SRC_EN,
PWRAP_WDT_FLG,
PWRAP_DEBUG_INT_SEL,
PWRAP_CIPHER_KEY_SEL,
PWRAP_CIPHER_IV_SEL,
PWRAP_CIPHER_RDY,
PWRAP_CIPHER_MODE,
PWRAP_CIPHER_SWRST,
PWRAP_DCM_EN,
PWRAP_DCM_DBC_PRD,
/* MT8135 only regs */
PWRAP_CSHEXT,
PWRAP_EVENT_IN_EN,
PWRAP_EVENT_DST_EN,
PWRAP_RRARB_INIT,
PWRAP_RRARB_EN,
PWRAP_RRARB_STA0,
PWRAP_RRARB_STA1,
PWRAP_EVENT_STA,
PWRAP_EVENT_STACLR,
PWRAP_CIPHER_LOAD,
PWRAP_CIPHER_START,
/* MT8173 only regs */
PWRAP_RDDMY,
PWRAP_SI_CK_CON,
PWRAP_DVFS_ADR0,
PWRAP_DVFS_WDATA0,
PWRAP_DVFS_ADR1,
PWRAP_DVFS_WDATA1,
PWRAP_DVFS_ADR2,
PWRAP_DVFS_WDATA2,
PWRAP_DVFS_ADR3,
PWRAP_DVFS_WDATA3,
PWRAP_DVFS_ADR4,
PWRAP_DVFS_WDATA4,
PWRAP_DVFS_ADR5,
PWRAP_DVFS_WDATA5,
PWRAP_DVFS_ADR6,
PWRAP_DVFS_WDATA6,
PWRAP_DVFS_ADR7,
PWRAP_DVFS_WDATA7,
PWRAP_SPMINF_STA,
PWRAP_CIPHER_EN,
};
static int mt8173_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
[PWRAP_SIDLY] = 0xc,
[PWRAP_RDDMY] = 0x10,
[PWRAP_SI_CK_CON] = 0x14,
[PWRAP_CSHEXT_WRITE] = 0x18,
[PWRAP_CSHEXT_READ] = 0x1c,
[PWRAP_CSLEXT_START] = 0x20,
[PWRAP_CSLEXT_END] = 0x24,
[PWRAP_STAUPD_PRD] = 0x28,
[PWRAP_STAUPD_GRPEN] = 0x2c,
[PWRAP_STAUPD_MAN_TRIG] = 0x40,
[PWRAP_STAUPD_STA] = 0x44,
[PWRAP_WRAP_STA] = 0x48,
[PWRAP_HARB_INIT] = 0x4c,
[PWRAP_HARB_HPRIO] = 0x50,
[PWRAP_HIPRIO_ARB_EN] = 0x54,
[PWRAP_HARB_STA0] = 0x58,
[PWRAP_HARB_STA1] = 0x5c,
[PWRAP_MAN_EN] = 0x60,
[PWRAP_MAN_CMD] = 0x64,
[PWRAP_MAN_RDATA] = 0x68,
[PWRAP_MAN_VLDCLR] = 0x6c,
[PWRAP_WACS0_EN] = 0x70,
[PWRAP_INIT_DONE0] = 0x74,
[PWRAP_WACS0_CMD] = 0x78,
[PWRAP_WACS0_RDATA] = 0x7c,
[PWRAP_WACS0_VLDCLR] = 0x80,
[PWRAP_WACS1_EN] = 0x84,
[PWRAP_INIT_DONE1] = 0x88,
[PWRAP_WACS1_CMD] = 0x8c,
[PWRAP_WACS1_RDATA] = 0x90,
[PWRAP_WACS1_VLDCLR] = 0x94,
[PWRAP_WACS2_EN] = 0x98,
[PWRAP_INIT_DONE2] = 0x9c,
[PWRAP_WACS2_CMD] = 0xa0,
[PWRAP_WACS2_RDATA] = 0xa4,
[PWRAP_WACS2_VLDCLR] = 0xa8,
[PWRAP_INT_EN] = 0xac,
[PWRAP_INT_FLG_RAW] = 0xb0,
[PWRAP_INT_FLG] = 0xb4,
[PWRAP_INT_CLR] = 0xb8,
[PWRAP_SIG_ADR] = 0xbc,
[PWRAP_SIG_MODE] = 0xc0,
[PWRAP_SIG_VALUE] = 0xc4,
[PWRAP_SIG_ERRVAL] = 0xc8,
[PWRAP_CRC_EN] = 0xcc,
[PWRAP_TIMER_EN] = 0xd0,
[PWRAP_TIMER_STA] = 0xd4,
[PWRAP_WDT_UNIT] = 0xd8,
[PWRAP_WDT_SRC_EN] = 0xdc,
[PWRAP_WDT_FLG] = 0xe0,
[PWRAP_DEBUG_INT_SEL] = 0xe4,
[PWRAP_DVFS_ADR0] = 0xe8,
[PWRAP_DVFS_WDATA0] = 0xec,
[PWRAP_DVFS_ADR1] = 0xf0,
[PWRAP_DVFS_WDATA1] = 0xf4,
[PWRAP_DVFS_ADR2] = 0xf8,
[PWRAP_DVFS_WDATA2] = 0xfc,
[PWRAP_DVFS_ADR3] = 0x100,
[PWRAP_DVFS_WDATA3] = 0x104,
[PWRAP_DVFS_ADR4] = 0x108,
[PWRAP_DVFS_WDATA4] = 0x10c,
[PWRAP_DVFS_ADR5] = 0x110,
[PWRAP_DVFS_WDATA5] = 0x114,
[PWRAP_DVFS_ADR6] = 0x118,
[PWRAP_DVFS_WDATA6] = 0x11c,
[PWRAP_DVFS_ADR7] = 0x120,
[PWRAP_DVFS_WDATA7] = 0x124,
[PWRAP_SPMINF_STA] = 0x128,
[PWRAP_CIPHER_KEY_SEL] = 0x12c,
[PWRAP_CIPHER_IV_SEL] = 0x130,
[PWRAP_CIPHER_EN] = 0x134,
[PWRAP_CIPHER_RDY] = 0x138,
[PWRAP_CIPHER_MODE] = 0x13c,
[PWRAP_CIPHER_SWRST] = 0x140,
[PWRAP_DCM_EN] = 0x144,
[PWRAP_DCM_DBC_PRD] = 0x148,
};
static int mt8135_regs[] = {
[PWRAP_MUX_SEL] = 0x0,
[PWRAP_WRAP_EN] = 0x4,
[PWRAP_DIO_EN] = 0x8,
[PWRAP_SIDLY] = 0xc,
[PWRAP_CSHEXT] = 0x10,
[PWRAP_CSHEXT_WRITE] = 0x14,
[PWRAP_CSHEXT_READ] = 0x18,
[PWRAP_CSLEXT_START] = 0x1c,
[PWRAP_CSLEXT_END] = 0x20,
[PWRAP_STAUPD_PRD] = 0x24,
[PWRAP_STAUPD_GRPEN] = 0x28,
[PWRAP_STAUPD_MAN_TRIG] = 0x2c,
[PWRAP_STAUPD_STA] = 0x30,
[PWRAP_EVENT_IN_EN] = 0x34,
[PWRAP_EVENT_DST_EN] = 0x38,
[PWRAP_WRAP_STA] = 0x3c,
[PWRAP_RRARB_INIT] = 0x40,
[PWRAP_RRARB_EN] = 0x44,
[PWRAP_RRARB_STA0] = 0x48,
[PWRAP_RRARB_STA1] = 0x4c,
[PWRAP_HARB_INIT] = 0x50,
[PWRAP_HARB_HPRIO] = 0x54,
[PWRAP_HIPRIO_ARB_EN] = 0x58,
[PWRAP_HARB_STA0] = 0x5c,
[PWRAP_HARB_STA1] = 0x60,
[PWRAP_MAN_EN] = 0x64,
[PWRAP_MAN_CMD] = 0x68,
[PWRAP_MAN_RDATA] = 0x6c,
[PWRAP_MAN_VLDCLR] = 0x70,
[PWRAP_WACS0_EN] = 0x74,
[PWRAP_INIT_DONE0] = 0x78,
[PWRAP_WACS0_CMD] = 0x7c,
[PWRAP_WACS0_RDATA] = 0x80,
[PWRAP_WACS0_VLDCLR] = 0x84,
[PWRAP_WACS1_EN] = 0x88,
[PWRAP_INIT_DONE1] = 0x8c,
[PWRAP_WACS1_CMD] = 0x90,
[PWRAP_WACS1_RDATA] = 0x94,
[PWRAP_WACS1_VLDCLR] = 0x98,
[PWRAP_WACS2_EN] = 0x9c,
[PWRAP_INIT_DONE2] = 0xa0,
[PWRAP_WACS2_CMD] = 0xa4,
[PWRAP_WACS2_RDATA] = 0xa8,
[PWRAP_WACS2_VLDCLR] = 0xac,
[PWRAP_INT_EN] = 0xb0,
[PWRAP_INT_FLG_RAW] = 0xb4,
[PWRAP_INT_FLG] = 0xb8,
[PWRAP_INT_CLR] = 0xbc,
[PWRAP_SIG_ADR] = 0xc0,
[PWRAP_SIG_MODE] = 0xc4,
[PWRAP_SIG_VALUE] = 0xc8,
[PWRAP_SIG_ERRVAL] = 0xcc,
[PWRAP_CRC_EN] = 0xd0,
[PWRAP_EVENT_STA] = 0xd4,
[PWRAP_EVENT_STACLR] = 0xd8,
[PWRAP_TIMER_EN] = 0xdc,
[PWRAP_TIMER_STA] = 0xe0,
[PWRAP_WDT_UNIT] = 0xe4,
[PWRAP_WDT_SRC_EN] = 0xe8,
[PWRAP_WDT_FLG] = 0xec,
[PWRAP_DEBUG_INT_SEL] = 0xf0,
[PWRAP_CIPHER_KEY_SEL] = 0x134,
[PWRAP_CIPHER_IV_SEL] = 0x138,
[PWRAP_CIPHER_LOAD] = 0x13c,
[PWRAP_CIPHER_START] = 0x140,
[PWRAP_CIPHER_RDY] = 0x144,
[PWRAP_CIPHER_MODE] = 0x148,
[PWRAP_CIPHER_SWRST] = 0x14c,
[PWRAP_DCM_EN] = 0x15c,
[PWRAP_DCM_DBC_PRD] = 0x160,
};
enum pwrap_type {
PWRAP_MT8135,
PWRAP_MT8173,
};
struct pmic_wrapper_type {
int *regs;
enum pwrap_type type;
u32 arb_en_all;
};
static struct pmic_wrapper_type pwrap_mt8135 = {
.regs = mt8135_regs,
.type = PWRAP_MT8135,
.arb_en_all = 0x1ff,
};
static struct pmic_wrapper_type pwrap_mt8173 = {
.regs = mt8173_regs,
.type = PWRAP_MT8173,
.arb_en_all = 0x3f,
};
struct pmic_wrapper {
struct device *dev;
void __iomem *base;
struct regmap *regmap;
int *regs;
enum pwrap_type type;
u32 arb_en_all;
struct clk *clk_spi;
struct clk *clk_wrap;
struct reset_control *rstc;
struct reset_control *rstc_bridge;
void __iomem *bridge_base;
};
static inline int pwrap_is_mt8135(struct pmic_wrapper *wrp)
{
return wrp->type == PWRAP_MT8135;
}
static inline int pwrap_is_mt8173(struct pmic_wrapper *wrp)
{
return wrp->type == PWRAP_MT8173;
}
static u32 pwrap_readl(struct pmic_wrapper *wrp, enum pwrap_regs reg)
{
return readl(wrp->base + wrp->regs[reg]);
}
static void pwrap_writel(struct pmic_wrapper *wrp, u32 val, enum pwrap_regs reg)
{
writel(val, wrp->base + wrp->regs[reg]);
}
static bool pwrap_is_fsm_idle(struct pmic_wrapper *wrp)
{
u32 val = pwrap_readl(wrp, PWRAP_WACS2_RDATA);
return PWRAP_GET_WACS_FSM(val) == PWRAP_WACS_FSM_IDLE;
}
static bool pwrap_is_fsm_vldclr(struct pmic_wrapper *wrp)
{
u32 val = pwrap_readl(wrp, PWRAP_WACS2_RDATA);
return PWRAP_GET_WACS_FSM(val) == PWRAP_WACS_FSM_WFVLDCLR;
}
/*
* Timeout issue sometimes caused by the last read command
* failed because pmic wrap could not got the FSM_VLDCLR
* in time after finishing WACS2_CMD. It made state machine
* still on FSM_VLDCLR and timeout next time.
* Check the status of FSM and clear the vldclr to recovery the
* error.
*/
static inline void pwrap_leave_fsm_vldclr(struct pmic_wrapper *wrp)
{
if (pwrap_is_fsm_vldclr(wrp))
pwrap_writel(wrp, 1, PWRAP_WACS2_VLDCLR);
}
static bool pwrap_is_sync_idle(struct pmic_wrapper *wrp)
{
return pwrap_readl(wrp, PWRAP_WACS2_RDATA) & PWRAP_STATE_SYNC_IDLE0;
}
static bool pwrap_is_fsm_idle_and_sync_idle(struct pmic_wrapper *wrp)
{
u32 val = pwrap_readl(wrp, PWRAP_WACS2_RDATA);
return (PWRAP_GET_WACS_FSM(val) == PWRAP_WACS_FSM_IDLE) &&
(val & PWRAP_STATE_SYNC_IDLE0);
}
static int pwrap_wait_for_state(struct pmic_wrapper *wrp,
bool (*fp)(struct pmic_wrapper *))
{
unsigned long timeout;
timeout = jiffies + usecs_to_jiffies(255);
do {
if (time_after(jiffies, timeout))
return fp(wrp) ? 0 : -ETIMEDOUT;
if (fp(wrp))
return 0;
} while (1);
}
static int pwrap_write(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
{
int ret;
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
if (ret) {
pwrap_leave_fsm_vldclr(wrp);
return ret;
}
pwrap_writel(wrp, (1 << 31) | ((adr >> 1) << 16) | wdata,
PWRAP_WACS2_CMD);
return 0;
}
static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
{
int ret;
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
if (ret) {
pwrap_leave_fsm_vldclr(wrp);
return ret;
}
pwrap_writel(wrp, (adr >> 1) << 16, PWRAP_WACS2_CMD);
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_vldclr);
if (ret)
return ret;
*rdata = PWRAP_GET_WACS_RDATA(pwrap_readl(wrp, PWRAP_WACS2_RDATA));
pwrap_writel(wrp, 1, PWRAP_WACS2_VLDCLR);
return 0;
}
static int pwrap_regmap_read(void *context, u32 adr, u32 *rdata)
{
return pwrap_read(context, adr, rdata);
}
static int pwrap_regmap_write(void *context, u32 adr, u32 wdata)
{
return pwrap_write(context, adr, wdata);
}
static int pwrap_reset_spislave(struct pmic_wrapper *wrp)
{
int ret, i;
pwrap_writel(wrp, 0, PWRAP_HIPRIO_ARB_EN);
pwrap_writel(wrp, 0, PWRAP_WRAP_EN);
pwrap_writel(wrp, 1, PWRAP_MUX_SEL);
pwrap_writel(wrp, 1, PWRAP_MAN_EN);
pwrap_writel(wrp, 0, PWRAP_DIO_EN);
pwrap_writel(wrp, PWRAP_MAN_CMD_SPI_WRITE | PWRAP_MAN_CMD_OP_CSL,
PWRAP_MAN_CMD);
pwrap_writel(wrp, PWRAP_MAN_CMD_SPI_WRITE | PWRAP_MAN_CMD_OP_OUTS,
PWRAP_MAN_CMD);
pwrap_writel(wrp, PWRAP_MAN_CMD_SPI_WRITE | PWRAP_MAN_CMD_OP_CSH,
PWRAP_MAN_CMD);
for (i = 0; i < 4; i++)
pwrap_writel(wrp, PWRAP_MAN_CMD_SPI_WRITE | PWRAP_MAN_CMD_OP_OUTS,
PWRAP_MAN_CMD);
ret = pwrap_wait_for_state(wrp, pwrap_is_sync_idle);
if (ret) {
dev_err(wrp->dev, "%s fail, ret=%d\n", __func__, ret);
return ret;
}
pwrap_writel(wrp, 0, PWRAP_MAN_EN);
pwrap_writel(wrp, 0, PWRAP_MUX_SEL);
return 0;
}
/*
* pwrap_init_sidly - configure serial input delay
*
* This configures the serial input delay. We can configure 0, 2, 4 or 6ns
* delay. Do a read test with all possible values and chose the best delay.
*/
static int pwrap_init_sidly(struct pmic_wrapper *wrp)
{
u32 rdata;
u32 i;
u32 pass = 0;
signed char dly[16] = {
-1, 0, 1, 0, 2, -1, 1, 1, 3, -1, -1, -1, 3, -1, 2, 1
};
for (i = 0; i < 4; i++) {
pwrap_writel(wrp, i, PWRAP_SIDLY);
pwrap_read(wrp, PWRAP_DEW_READ_TEST, &rdata);
if (rdata == PWRAP_DEW_READ_TEST_VAL) {
dev_dbg(wrp->dev, "[Read Test] pass, SIDLY=%x\n", i);
pass |= 1 << i;
}
}
if (dly[pass] < 0) {
dev_err(wrp->dev, "sidly pass range 0x%x not continuous\n",
pass);
return -EIO;
}
pwrap_writel(wrp, dly[pass], PWRAP_SIDLY);
return 0;
}
static int pwrap_init_reg_clock(struct pmic_wrapper *wrp)
{
if (pwrap_is_mt8135(wrp)) {
pwrap_writel(wrp, 0x4, PWRAP_CSHEXT);
pwrap_writel(wrp, 0x0, PWRAP_CSHEXT_WRITE);
pwrap_writel(wrp, 0x4, PWRAP_CSHEXT_READ);
pwrap_writel(wrp, 0x0, PWRAP_CSLEXT_START);
pwrap_writel(wrp, 0x0, PWRAP_CSLEXT_END);
} else {
pwrap_writel(wrp, 0x0, PWRAP_CSHEXT_WRITE);
pwrap_writel(wrp, 0x4, PWRAP_CSHEXT_READ);
pwrap_writel(wrp, 0x2, PWRAP_CSLEXT_START);
pwrap_writel(wrp, 0x2, PWRAP_CSLEXT_END);
}
return 0;
}
static bool pwrap_is_cipher_ready(struct pmic_wrapper *wrp)
{
return pwrap_readl(wrp, PWRAP_CIPHER_RDY) & 1;
}
static bool pwrap_is_pmic_cipher_ready(struct pmic_wrapper *wrp)
{
u32 rdata;
int ret;
ret = pwrap_read(wrp, PWRAP_DEW_CIPHER_RDY, &rdata);
if (ret)
return 0;
return rdata == 1;
}
static int pwrap_init_cipher(struct pmic_wrapper *wrp)
{
int ret;
u32 rdata;
pwrap_writel(wrp, 0x1, PWRAP_CIPHER_SWRST);
pwrap_writel(wrp, 0x0, PWRAP_CIPHER_SWRST);
pwrap_writel(wrp, 0x1, PWRAP_CIPHER_KEY_SEL);
pwrap_writel(wrp, 0x2, PWRAP_CIPHER_IV_SEL);
if (pwrap_is_mt8135(wrp)) {
pwrap_writel(wrp, 1, PWRAP_CIPHER_LOAD);
pwrap_writel(wrp, 1, PWRAP_CIPHER_START);
} else {
pwrap_writel(wrp, 1, PWRAP_CIPHER_EN);
}
/* Config cipher mode @PMIC */
pwrap_write(wrp, PWRAP_DEW_CIPHER_SWRST, 0x1);
pwrap_write(wrp, PWRAP_DEW_CIPHER_SWRST, 0x0);
pwrap_write(wrp, PWRAP_DEW_CIPHER_KEY_SEL, 0x1);
pwrap_write(wrp, PWRAP_DEW_CIPHER_IV_SEL, 0x2);
pwrap_write(wrp, PWRAP_DEW_CIPHER_LOAD, 0x1);
pwrap_write(wrp, PWRAP_DEW_CIPHER_START, 0x1);
/* wait for cipher data ready@AP */
ret = pwrap_wait_for_state(wrp, pwrap_is_cipher_ready);
if (ret) {
dev_err(wrp->dev, "cipher data ready@AP fail, ret=%d\n", ret);
return ret;
}
/* wait for cipher data ready@PMIC */
ret = pwrap_wait_for_state(wrp, pwrap_is_pmic_cipher_ready);
if (ret) {
dev_err(wrp->dev, "timeout waiting for cipher data ready@PMIC\n");
return ret;
}
/* wait for cipher mode idle */
pwrap_write(wrp, PWRAP_DEW_CIPHER_MODE, 0x1);
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle_and_sync_idle);
if (ret) {
dev_err(wrp->dev, "cipher mode idle fail, ret=%d\n", ret);
return ret;
}
pwrap_writel(wrp, 1, PWRAP_CIPHER_MODE);
/* Write Test */
if (pwrap_write(wrp, PWRAP_DEW_WRITE_TEST, PWRAP_DEW_WRITE_TEST_VAL) ||
pwrap_read(wrp, PWRAP_DEW_WRITE_TEST, &rdata) ||
(rdata != PWRAP_DEW_WRITE_TEST_VAL)) {
dev_err(wrp->dev, "rdata=0x%04X\n", rdata);
return -EFAULT;
}
return 0;
}
static int pwrap_init(struct pmic_wrapper *wrp)
{
int ret;
u32 rdata;
reset_control_reset(wrp->rstc);
if (wrp->rstc_bridge)
reset_control_reset(wrp->rstc_bridge);
if (pwrap_is_mt8173(wrp)) {
/* Enable DCM */
pwrap_writel(wrp, 3, PWRAP_DCM_EN);
pwrap_writel(wrp, 0, PWRAP_DCM_DBC_PRD);
}
/* Reset SPI slave */
ret = pwrap_reset_spislave(wrp);
if (ret)
return ret;
pwrap_writel(wrp, 1, PWRAP_WRAP_EN);
pwrap_writel(wrp, wrp->arb_en_all, PWRAP_HIPRIO_ARB_EN);
pwrap_writel(wrp, 1, PWRAP_WACS2_EN);
ret = pwrap_init_reg_clock(wrp);
if (ret)
return ret;
/* Setup serial input delay */
ret = pwrap_init_sidly(wrp);
if (ret)
return ret;
/* Enable dual IO mode */
pwrap_write(wrp, PWRAP_DEW_DIO_EN, 1);
/* Check IDLE & INIT_DONE in advance */
ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle_and_sync_idle);
if (ret) {
dev_err(wrp->dev, "%s fail, ret=%d\n", __func__, ret);
return ret;
}
pwrap_writel(wrp, 1, PWRAP_DIO_EN);
/* Read Test */
pwrap_read(wrp, PWRAP_DEW_READ_TEST, &rdata);
if (rdata != PWRAP_DEW_READ_TEST_VAL) {
dev_err(wrp->dev, "Read test failed after switch to DIO mode: 0x%04x != 0x%04x\n",
PWRAP_DEW_READ_TEST_VAL, rdata);
return -EFAULT;
}
/* Enable encryption */
ret = pwrap_init_cipher(wrp);
if (ret)
return ret;
/* Signature checking - using CRC */
if (pwrap_write(wrp, PWRAP_DEW_CRC_EN, 0x1))
return -EFAULT;
pwrap_writel(wrp, 0x1, PWRAP_CRC_EN);
pwrap_writel(wrp, 0x0, PWRAP_SIG_MODE);
pwrap_writel(wrp, PWRAP_DEW_CRC_VAL, PWRAP_SIG_ADR);
pwrap_writel(wrp, wrp->arb_en_all, PWRAP_HIPRIO_ARB_EN);
if (pwrap_is_mt8135(wrp))
pwrap_writel(wrp, 0x7, PWRAP_RRARB_EN);
pwrap_writel(wrp, 0x1, PWRAP_WACS0_EN);
pwrap_writel(wrp, 0x1, PWRAP_WACS1_EN);
pwrap_writel(wrp, 0x1, PWRAP_WACS2_EN);
pwrap_writel(wrp, 0x5, PWRAP_STAUPD_PRD);
pwrap_writel(wrp, 0xff, PWRAP_STAUPD_GRPEN);
if (pwrap_is_mt8135(wrp)) {
/* enable pwrap events and pwrap bridge in AP side */
pwrap_writel(wrp, 0x1, PWRAP_EVENT_IN_EN);
pwrap_writel(wrp, 0xffff, PWRAP_EVENT_DST_EN);
writel(0x7f, wrp->bridge_base + PWRAP_MT8135_BRIDGE_IORD_ARB_EN);
writel(0x1, wrp->bridge_base + PWRAP_MT8135_BRIDGE_WACS3_EN);
writel(0x1, wrp->bridge_base + PWRAP_MT8135_BRIDGE_WACS4_EN);
writel(0x1, wrp->bridge_base + PWRAP_MT8135_BRIDGE_WDT_UNIT);
writel(0xffff, wrp->bridge_base + PWRAP_MT8135_BRIDGE_WDT_SRC_EN);
writel(0x1, wrp->bridge_base + PWRAP_MT8135_BRIDGE_TIMER_EN);
writel(0x7ff, wrp->bridge_base + PWRAP_MT8135_BRIDGE_INT_EN);
/* enable PMIC event out and sources */
if (pwrap_write(wrp, PWRAP_DEW_EVENT_OUT_EN, 0x1) ||
pwrap_write(wrp, PWRAP_DEW_EVENT_SRC_EN, 0xffff)) {
dev_err(wrp->dev, "enable dewrap fail\n");
return -EFAULT;
}
} else {
/* PMIC_DEWRAP enables */
if (pwrap_write(wrp, PWRAP_DEW_EVENT_OUT_EN, 0x1) ||
pwrap_write(wrp, PWRAP_DEW_EVENT_SRC_EN, 0xffff)) {
dev_err(wrp->dev, "enable dewrap fail\n");
return -EFAULT;
}
}
/* Setup the init done registers */
pwrap_writel(wrp, 1, PWRAP_INIT_DONE2);
pwrap_writel(wrp, 1, PWRAP_INIT_DONE0);
pwrap_writel(wrp, 1, PWRAP_INIT_DONE1);
if (pwrap_is_mt8135(wrp)) {
writel(1, wrp->bridge_base + PWRAP_MT8135_BRIDGE_INIT_DONE3);
writel(1, wrp->bridge_base + PWRAP_MT8135_BRIDGE_INIT_DONE4);
}
return 0;
}
static irqreturn_t pwrap_interrupt(int irqno, void *dev_id)
{
u32 rdata;
struct pmic_wrapper *wrp = dev_id;
rdata = pwrap_readl(wrp, PWRAP_INT_FLG);
dev_err(wrp->dev, "unexpected interrupt int=0x%x\n", rdata);
pwrap_writel(wrp, 0xffffffff, PWRAP_INT_CLR);
return IRQ_HANDLED;
}
static const struct regmap_config pwrap_regmap_config = {
.reg_bits = 16,
.val_bits = 16,
.reg_stride = 2,
.reg_read = pwrap_regmap_read,
.reg_write = pwrap_regmap_write,
.max_register = 0xffff,
};
static struct of_device_id of_pwrap_match_tbl[] = {
{
.compatible = "mediatek,mt8135-pwrap",
.data = &pwrap_mt8135,
}, {
.compatible = "mediatek,mt8173-pwrap",
.data = &pwrap_mt8173,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, of_pwrap_match_tbl);
static int pwrap_probe(struct platform_device *pdev)
{
int ret, irq;
struct pmic_wrapper *wrp;
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *of_id =
of_match_device(of_pwrap_match_tbl, &pdev->dev);
const struct pmic_wrapper_type *type;
struct resource *res;
wrp = devm_kzalloc(&pdev->dev, sizeof(*wrp), GFP_KERNEL);
if (!wrp)
return -ENOMEM;
platform_set_drvdata(pdev, wrp);
type = of_id->data;
wrp->regs = type->regs;
wrp->type = type->type;
wrp->arb_en_all = type->arb_en_all;
wrp->dev = &pdev->dev;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwrap");
wrp->base = devm_ioremap_resource(wrp->dev, res);
if (IS_ERR(wrp->base))
return PTR_ERR(wrp->base);
wrp->rstc = devm_reset_control_get(wrp->dev, "pwrap");
if (IS_ERR(wrp->rstc)) {
ret = PTR_ERR(wrp->rstc);
dev_dbg(wrp->dev, "cannot get pwrap reset: %d\n", ret);
return ret;
}
if (pwrap_is_mt8135(wrp)) {
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"pwrap-bridge");
wrp->bridge_base = devm_ioremap_resource(wrp->dev, res);
if (IS_ERR(wrp->bridge_base))
return PTR_ERR(wrp->bridge_base);
wrp->rstc_bridge = devm_reset_control_get(wrp->dev, "pwrap-bridge");
if (IS_ERR(wrp->rstc_bridge)) {
ret = PTR_ERR(wrp->rstc_bridge);
dev_dbg(wrp->dev, "cannot get pwrap-bridge reset: %d\n", ret);
return ret;
}
}
wrp->clk_spi = devm_clk_get(wrp->dev, "spi");
if (IS_ERR(wrp->clk_spi)) {
dev_dbg(wrp->dev, "failed to get clock: %ld\n", PTR_ERR(wrp->clk_spi));
return PTR_ERR(wrp->clk_spi);
}
wrp->clk_wrap = devm_clk_get(wrp->dev, "wrap");
if (IS_ERR(wrp->clk_wrap)) {
dev_dbg(wrp->dev, "failed to get clock: %ld\n", PTR_ERR(wrp->clk_wrap));
return PTR_ERR(wrp->clk_wrap);
}
ret = clk_prepare_enable(wrp->clk_spi);
if (ret)
return ret;
ret = clk_prepare_enable(wrp->clk_wrap);
if (ret)
goto err_out1;
/* Enable internal dynamic clock */
pwrap_writel(wrp, 1, PWRAP_DCM_EN);
pwrap_writel(wrp, 0, PWRAP_DCM_DBC_PRD);
/*
* The PMIC could already be initialized by the bootloader.
* Skip initialization here in this case.
*/
if (!pwrap_readl(wrp, PWRAP_INIT_DONE2)) {
ret = pwrap_init(wrp);
if (ret) {
dev_dbg(wrp->dev, "init failed with %d\n", ret);
goto err_out2;
}
}
if (!(pwrap_readl(wrp, PWRAP_WACS2_RDATA) & PWRAP_STATE_INIT_DONE0)) {
dev_dbg(wrp->dev, "initialization isn't finished\n");
return -ENODEV;
}
/* Initialize watchdog, may not be done by the bootloader */
pwrap_writel(wrp, 0xf, PWRAP_WDT_UNIT);
pwrap_writel(wrp, 0xffffffff, PWRAP_WDT_SRC_EN);
pwrap_writel(wrp, 0x1, PWRAP_TIMER_EN);
pwrap_writel(wrp, ~((1 << 31) | (1 << 1)), PWRAP_INT_EN);
irq = platform_get_irq(pdev, 0);
ret = devm_request_irq(wrp->dev, irq, pwrap_interrupt, IRQF_TRIGGER_HIGH,
"mt-pmic-pwrap", wrp);
if (ret)
goto err_out2;
wrp->regmap = devm_regmap_init(wrp->dev, NULL, wrp, &pwrap_regmap_config);
if (IS_ERR(wrp->regmap))
return PTR_ERR(wrp->regmap);
ret = of_platform_populate(np, NULL, NULL, wrp->dev);
if (ret) {
dev_dbg(wrp->dev, "failed to create child devices at %s\n",
np->full_name);
goto err_out2;
}
return 0;
err_out2:
clk_disable_unprepare(wrp->clk_wrap);
err_out1:
clk_disable_unprepare(wrp->clk_spi);
return ret;
}
static struct platform_driver pwrap_drv = {
.driver = {
.name = "mt-pmic-pwrap",
.of_match_table = of_match_ptr(of_pwrap_match_tbl),
},
.probe = pwrap_probe,
};
module_platform_driver(pwrap_drv);
MODULE_AUTHOR("Flora Fu, MediaTek");
MODULE_DESCRIPTION("MediaTek MT8135 PMIC Wrapper Driver");
MODULE_LICENSE("GPL v2");
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