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linux/drivers/soc/mediatek/mtk-pmic-wrap.c
Sascha Hauer d956b80ac7 soc: mediatek: PMIC wrap: Fix register state machine handling 
When the PMIC wrapper state machine has read a register it goes into the
"wait for valid clear" (vldclr) state. The state machine stays in this
state until the VLDCLR bit is written to. We should write this bit after
reading a register because the SCPSYS won't let the system go into
suspend as long as the state machine waits for valid clear.

Since now we never leave the state machine in vldclr state we no longer
have to check for this state on pwrap_read/pwrap_write entry and can
remove the corresponding code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
2015-05-27 14:11:41 +02:00

940 lines
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/*
* 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;
}
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)
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)
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);
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);
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;
}
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",
.owner = THIS_MODULE,
.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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