[PATCH v3 1/8] soc: mediatek: Add PMIC wrapper for MT8135 and MT6397 SoC

From: Flora Fu
Date: Thu Dec 04 2014 - 23:13:52 EST

Add PMIC wrapper of MT8135 to access MT6397 MFD.

Signed-off-by: Flora Fu <flora.fu@xxxxxxxxxxxx>
---
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/mediatek/Kconfig | 12 +
drivers/soc/mediatek/Makefile | 1 +
drivers/soc/mediatek/mt8135-pmic-wrap.c | 844 +++++++++++++++++++++++++++++
drivers/soc/mediatek/mt8135-pmic-wrap.h | 138 +++++
include/linux/soc/mediatek/mtk-pmic-wrap.h | 25 +
7 files changed, 1022 insertions(+)
create mode 100644 drivers/soc/mediatek/Kconfig
create mode 100644 drivers/soc/mediatek/Makefile
create mode 100644 drivers/soc/mediatek/mt8135-pmic-wrap.c
create mode 100644 drivers/soc/mediatek/mt8135-pmic-wrap.h
create mode 100644 include/linux/soc/mediatek/mtk-pmic-wrap.h

diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index 76d6bd4..d8bde82 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -1,5 +1,6 @@
menu "SOC (System On Chip) specific Drivers"

+source "drivers/soc/mediatek/Kconfig"
source "drivers/soc/qcom/Kconfig"
source "drivers/soc/ti/Kconfig"
source "drivers/soc/versatile/Kconfig"
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 063113d..70042b2 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -2,6 +2,7 @@
# Makefile for the Linux Kernel SOC specific device drivers.
#

+obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/
obj-$(CONFIG_ARCH_QCOM) += qcom/
obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-$(CONFIG_SOC_TI) += ti/
diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig
new file mode 100644
index 0000000..746e030
--- /dev/null
+++ b/drivers/soc/mediatek/Kconfig
@@ -0,0 +1,12 @@
+#
+# MediaTek SoC drivers
+#
+config MT8135_PMIC_WRAP
+ tristate "MediaTek MT8135 PMIC Wrapper Support"
+ depends on ARCH_MEDIATEK
+ select REGMAP
+ help
+ Say yes here to add support for MediaTek MT8135 PMIC Wrapper.
+ PMIC wrapper is a proprietary hardware in MT8135 to make
+ communication protocols to access PMIC device.
+ This driver implement access protocols for MT8135.
diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile
new file mode 100644
index 0000000..49b9588
--- /dev/null
+++ b/drivers/soc/mediatek/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_MT8135_PMIC_WRAP) += mt8135-pmic-wrap.o
diff --git a/drivers/soc/mediatek/mt8135-pmic-wrap.c b/drivers/soc/mediatek/mt8135-pmic-wrap.c
new file mode 100644
index 0000000..75aa28e
--- /dev/null
+++ b/drivers/soc/mediatek/mt8135-pmic-wrap.c
@@ -0,0 +1,844 @@
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ * Author: Flora Fu <flora.fu@xxxxxxxxxxxx>
+ *
+ * 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>
+#include <linux/mfd/mt6397/registers.h>
+#include <linux/soc/mediatek/mtk-pmic-wrap.h>
+#include "mt8135-pmic-wrap.h"
+
+/* macro for wrapper status */
+#define PWRAP_GET_WACS0_WDATA(x) (((x) >> 0) & 0x0000ffff)
+#define PWRAP_GET_WACS0_ADR(x) (((x) >> 16) & 0x00007fff)
+#define PWRAP_GET_WACS0_WRITE(x) (((x) >> 31) & 0x00000001)
+#define PWRAP_GET_WACS0_RDATA(x) (((x) >> 0) & 0x0000ffff)
+#define PWRAP_GET_WACS0_FSM(x) (((x) >> 16) & 0x00000007)
+#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
+
+/* 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_OP_WR 0x1
+#define PWRAP_OP_RD 0x0
+#define PWRAP_OP_CSH 0x0
+#define PWRAP_OP_CSL 0x1
+#define PWRAP_OP_OUTS 0x8
+#define PWRAP_OP_OUTD 0x9
+#define PWRAP_OP_OUTQ 0xA
+
+static bool is_fsm_idle(u32 x)
+{
+ return PWRAP_GET_WACS0_FSM(x) == PWRAP_WACS_FSM_IDLE;
+}
+
+static bool is_fsm_vldclr(u32 x)
+{
+ return PWRAP_GET_WACS0_FSM(x) == PWRAP_WACS_FSM_WFVLDCLR;
+}
+
+static bool is_sync_idle(u32 x)
+{
+ return x & PWRAP_STATE_SYNC_IDLE0;
+}
+
+static bool is_fsm_idle_and_sync_idle(u32 x)
+{
+ return (PWRAP_GET_WACS0_FSM(x) == PWRAP_WACS_FSM_IDLE) &&
+ (x & PWRAP_STATE_SYNC_IDLE0);
+}
+
+static bool is_cipher_ready(u32 x)
+{
+ return x == 1;
+}
+
+static int wait_for_state_ready(
+ struct pmic_wrapper *wrp, bool (*fp)(u32),
+ void *wacs_register, void *wacs_vldclr_register, u32 *read_reg)
+{
+ u32 reg_rdata;
+ unsigned long timeout;
+ int timeout_retry = 0;
+ struct device *dev = &wrp->pdev->dev;
+
+ timeout = jiffies + usecs_to_jiffies(255);
+ do {
+ reg_rdata = readl(wacs_register);
+ if (time_after(jiffies, timeout)) {
+ if (timeout_retry) {
+ dev_err(dev, "timeout when waiting for idle\n");
+ return -ETIMEDOUT;
+ }
+ timeout_retry = 1;
+ }
+ } while (!fp(reg_rdata));
+
+ if (read_reg)
+ *read_reg = reg_rdata;
+
+ return 0;
+}
+
+static int pwrap_write(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
+{
+ u32 wacs_cmd;
+ int ret;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ ret = wait_for_state_ready(wrp, is_fsm_idle,
+ pwrap_base + PWRAP_WACS2_RDATA,
+ pwrap_base + PWRAP_WACS2_VLDCLR, 0);
+ if (ret) {
+ dev_err(dev, "%s command fail, ret=%d\n", __func__, ret);
+ return ret;
+ }
+
+ wacs_cmd = (1 << 31) | ((adr >> 1) << 16) | wdata;
+ writel(wacs_cmd, pwrap_base + PWRAP_WACS2_CMD);
+
+ return 0;
+}
+
+static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
+{
+ u32 reg_rdata;
+ u32 wacs_cmd;
+ int ret;
+ u32 rval;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ if (!rdata)
+ return -EINVAL;
+
+ ret = wait_for_state_ready(wrp, is_fsm_idle,
+ pwrap_base + PWRAP_WACS2_RDATA,
+ pwrap_base + PWRAP_WACS2_VLDCLR, 0);
+ if (ret) {
+ dev_err(dev, "%s command fail, ret=%d\n", __func__, ret);
+ return ret;
+ }
+
+ wacs_cmd = (adr >> 1) << 16;
+ writel(wacs_cmd, pwrap_base + PWRAP_WACS2_CMD);
+
+ ret = wait_for_state_ready(wrp, is_fsm_vldclr,
+ pwrap_base + PWRAP_WACS2_RDATA, NULL, &reg_rdata);
+ if (ret) {
+ dev_err(dev, "%s read fail, ret=%d\n", __func__, ret);
+ return ret;
+ }
+ rval = PWRAP_GET_WACS0_RDATA(reg_rdata);
+ writel(1, pwrap_base + PWRAP_WACS2_VLDCLR);
+ *rdata = rval;
+
+ return 0;
+}
+
+static int pwrap_regmap_read(void *context, u32 adr, u32 *rdata)
+{
+ u32 reg_rdata;
+
+ struct pmic_wrapper *wrp = context;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+
+ reg_rdata = readl(pwrap_base + PWRAP_WACS2_RDATA);
+ if (PWRAP_GET_WACS0_FSM(reg_rdata) == PWRAP_WACS_FSM_WFVLDCLR)
+ writel(1, pwrap_base + PWRAP_WACS2_VLDCLR);
+
+ return pwrap_read(wrp, adr, rdata);
+}
+
+static int pwrap_regmap_write(void *context, u32 adr, u32 wdata)
+{
+ u32 reg_rdata;
+
+ struct pmic_wrapper *wrp = context;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+
+ reg_rdata = readl(pwrap_base + PWRAP_WACS2_RDATA);
+ if (PWRAP_GET_WACS0_FSM(reg_rdata) == PWRAP_WACS_FSM_WFVLDCLR)
+ writel(1, pwrap_base + PWRAP_WACS2_VLDCLR);
+
+ return pwrap_write(wrp, adr, wdata);
+}
+
+static int pwrap_reset(struct pmic_wrapper *wrp)
+{
+ int ret;
+ struct reset_control *rstc_infracfg, *rstc_pericfg;
+ struct device *dev = &wrp->pdev->dev;
+
+ rstc_infracfg = devm_reset_control_get(dev, "infra-pwrap-rst");
+ if (IS_ERR(rstc_infracfg)) {
+ ret = PTR_ERR(rstc_infracfg);
+ dev_err(dev, "get pwrap-rst failed=%d\n", ret);
+ return ret;
+ }
+ rstc_pericfg = devm_reset_control_get(dev, "peri-pwrap-bridge-rst");
+ if (IS_ERR(rstc_pericfg)) {
+ ret = PTR_ERR(rstc_pericfg);
+ dev_err(dev, "get peri-pwrap-bridge-rst failed=%d\n", ret);
+ return ret;
+ }
+
+ reset_control_assert(rstc_infracfg);
+ reset_control_assert(rstc_pericfg);
+ reset_control_deassert(rstc_infracfg);
+ reset_control_deassert(rstc_pericfg);
+
+ return 0;
+}
+
+static int pwrap_set_clock(struct pmic_wrapper *wrp)
+{
+ int ret;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+ struct clk *pmicspi;
+ struct clk *pmicspi_parent;
+
+ pmicspi = devm_clk_get(dev, "pmicspi-sel");
+ if (IS_ERR(pmicspi)) {
+ ret = PTR_ERR(pmicspi);
+ dev_err(dev, "pmicspi-sel fail ret=%d\n", ret);
+ return ret;
+ }
+ pmicspi_parent = devm_clk_get(dev, "pmicspi-parent");
+ if (IS_ERR(pmicspi_parent)) {
+ ret = PTR_ERR(pmicspi_parent);
+ dev_err(dev, "pmicspi-parent fail ret=%d\n", ret);
+ return ret;
+ }
+
+ /* Note: HW design, enable clock mux and then switch to new source. */
+ ret = clk_set_parent(pmicspi, pmicspi_parent);
+ if (ret) {
+ dev_err(dev, "prepare pmicspi clock fail, ret=%d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(pmicspi);
+ if (ret) {
+ dev_err(dev, "prepare pmicspi clock fail, ret=%d\n", ret);
+ return ret;
+ }
+
+ /* Enable internal dynamic clock */
+ writel(1, pwrap_base + PWRAP_DCM_EN);
+ writel(0, pwrap_base + PWRAP_DCM_DBC_PRD);
+
+ return 0;
+}
+
+static int pwrap_reset_spislv(struct pmic_wrapper *wrp)
+{
+ int ret, i;
+ u32 cmd;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ writel(0, pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ writel(0, pwrap_base + PWRAP_WRAP_EN);
+ writel(1, pwrap_base + PWRAP_MUX_SEL);
+ writel(1, pwrap_base + PWRAP_MAN_EN);
+ writel(0, pwrap_base + PWRAP_DIO_EN);
+
+ cmd = (PWRAP_OP_WR << 13) | (PWRAP_OP_CSL << 8);
+ writel(cmd, pwrap_base + PWRAP_MAN_CMD);
+
+ cmd = (PWRAP_OP_WR << 13) | (PWRAP_OP_OUTS << 8);
+ writel(cmd, pwrap_base + PWRAP_MAN_CMD);
+
+ cmd = (PWRAP_OP_WR << 13) | (PWRAP_OP_CSH << 8);
+ writel(cmd, pwrap_base + PWRAP_MAN_CMD);
+
+ for (i = 0; i < 4; i++) {
+ cmd = (PWRAP_OP_WR << 13) | (PWRAP_OP_OUTS << 8);
+ writel(cmd, pwrap_base + PWRAP_MAN_CMD);
+ }
+ ret = wait_for_state_ready(wrp, is_sync_idle,
+ pwrap_base + PWRAP_WACS2_RDATA, NULL, 0);
+ if (ret)
+ dev_err(dev, "%s fail, ret=%d\n", __func__, ret);
+
+ writel(0, pwrap_base + PWRAP_MAN_EN);
+ writel(0, pwrap_base + PWRAP_MUX_SEL);
+
+ return 0;
+}
+
+static int pwrap_init_sidly(struct pmic_wrapper *wrp)
+{
+ u32 arb_en_backup;
+ u32 rdata;
+ u32 ind;
+ u32 result;
+ u32 sidly;
+ bool failed = false;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ /* Enable WACS2 to do read test on bus */
+ writel(1, pwrap_base + PWRAP_WRAP_EN);
+ writel(0x8, pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ writel(1, pwrap_base + PWRAP_WACS2_EN);
+ arb_en_backup = readl(pwrap_base + PWRAP_HIPRIO_ARB_EN);
+
+ /* Scan all SIDLY by Read Test */
+ result = 0;
+ for (ind = 0; ind < 4; ind++) {
+ writel(ind, wrp->pwrap_base + PWRAP_SIDLY);
+ pwrap_read(wrp, PWRAP_DEW_READ_TEST, &rdata);
+ if (rdata == PWRAP_DEW_READ_TEST_VAL) {
+ dev_info(dev, "[Read Test] pass, SIDLY=%x\n", ind);
+ result |= (0x1 << ind);
+ }
+ }
+
+ /* Config SIDLY according to results */
+ switch (result) {
+ /* only 1 pass, choose it */
+ case 0x1:
+ sidly = 0;
+ break;
+ case 0x2:
+ sidly = 1;
+ break;
+ case 0x4:
+ sidly = 2;
+ break;
+ case 0x8:
+ sidly = 3;
+ break;
+ /* two pass, choose the one on SIDLY boundary */
+ case 0x3:
+ sidly = 0;
+ break;
+ case 0x6: /* no boundary, choose smaller one */
+ sidly = 1;
+ break;
+ case 0xc:
+ sidly = 3;
+ break;
+ /* three pass, choose the middle one */
+ case 0x7:
+ sidly = 1;
+ break;
+ case 0xe:
+ sidly = 2;
+ break;
+ /* four pass, choose the smaller middle one */
+ case 0xf:
+ sidly = 1;
+ break;
+ /* pass range not continuous, should not happen */
+ default:
+ sidly = 0;
+ failed = true;
+ break;
+ }
+ writel(sidly, pwrap_base + PWRAP_SIDLY);
+ writel(arb_en_backup, pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ if (!failed)
+ return 0;
+
+ dev_err(dev, "%s fail, result=%x\n", __func__, result);
+
+ return -EIO;
+}
+
+static int pwrap_init_reg_clock(struct pmic_wrapper *wrp, u32 regck_sel)
+{
+ u32 wdata;
+ u32 rdata;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ pwrap_read(wrp, MT6397_TOP_CKCON2, &rdata);
+ wdata = rdata & (~(0x3 << 10));
+ if (regck_sel == 1)
+ wdata |= (0x1 << 10);
+
+ if (pwrap_write(wrp, MT6397_TOP_CKCON2, wdata)) {
+ dev_err(dev, "Enable PMIC TOP_CKCON2 fail\n");
+ return -EFAULT;
+ }
+ switch (regck_sel) {
+ case 1:
+ writel(0xc, pwrap_base + PWRAP_CSHEXT);
+ writel(0x4, pwrap_base + PWRAP_CSHEXT_WRITE);
+ writel(0xc, pwrap_base + PWRAP_CSHEXT_READ);
+ writel(0x0, pwrap_base + PWRAP_CSLEXT_START);
+ writel(0x0, pwrap_base + PWRAP_CSLEXT_END);
+ break;
+ case 2:
+ writel(0x4, pwrap_base + PWRAP_CSHEXT);
+ writel(0x0, pwrap_base + PWRAP_CSHEXT_WRITE);
+ writel(0x4, pwrap_base + PWRAP_CSHEXT_READ);
+ writel(0x0, pwrap_base + PWRAP_CSLEXT_START);
+ writel(0x0, pwrap_base + PWRAP_CSLEXT_END);
+ break;
+ default:
+ writel(0xf, pwrap_base + PWRAP_CSHEXT);
+ writel(0xf, pwrap_base + PWRAP_CSHEXT_WRITE);
+ writel(0xf, pwrap_base + PWRAP_CSHEXT_READ);
+ writel(0xf, pwrap_base + PWRAP_CSLEXT_START);
+ writel(0xf, pwrap_base + PWRAP_CSLEXT_END);
+ break;
+ }
+
+ /* Enable PMIC side reg clock */
+ if (pwrap_write(wrp, MT6397_WRP_CKPDN, 0) ||
+ pwrap_write(wrp, MT6397_WRP_RST_CON, 0)) {
+ dev_err(dev, "Enable PMIC fail\n");
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int pwrap_init_dio(struct pmic_wrapper *wrp, u32 dio_en)
+{
+ u32 arb_en_backup;
+ u32 rdata;
+ int ret;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ arb_en_backup = readl(pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ writel(0x8, pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ pwrap_write(wrp, PWRAP_DEW_DIO_EN, dio_en);
+
+ /* Check IDLE & INIT_DONE in advance */
+ ret = wait_for_state_ready(wrp, is_fsm_idle_and_sync_idle,
+ pwrap_base + PWRAP_WACS2_RDATA, NULL, 0);
+ if (ret) {
+ dev_err(dev, "%s fail, ret=%d\n", __func__, ret);
+ return ret;
+ }
+ writel(dio_en, pwrap_base + PWRAP_DIO_EN);
+
+ /* Read Test */
+ pwrap_read(wrp, PWRAP_DEW_READ_TEST, &rdata);
+ if (rdata != PWRAP_DEW_READ_TEST_VAL) {
+ dev_err(dev, "DIO Test Fail en=%x, rdata=%x\n", dio_en, rdata);
+ return -EFAULT;
+ }
+
+ writel(arb_en_backup, pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ return 0;
+}
+
+static int pwrap_init_cipher(struct pmic_wrapper *wrp)
+{
+ int ret;
+ u32 arb_en_backup;
+ u32 rdata;
+ unsigned long timeout;
+ int timeout_retry = 0;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ arb_en_backup = readl(pwrap_base + PWRAP_HIPRIO_ARB_EN);
+
+ writel(0x8, pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ writel(1, pwrap_base + PWRAP_CIPHER_SWRST);
+ writel(0, pwrap_base + PWRAP_CIPHER_SWRST);
+ writel(1, pwrap_base + PWRAP_CIPHER_KEY_SEL);
+ writel(2, pwrap_base + PWRAP_CIPHER_IV_SEL);
+ writel(1, pwrap_base + PWRAP_CIPHER_LOAD);
+ writel(1, pwrap_base + PWRAP_CIPHER_START);
+
+ /* 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 = wait_for_state_ready(wrp, is_cipher_ready,
+ pwrap_base + PWRAP_CIPHER_RDY, NULL, 0);
+ if (ret) {
+ dev_err(dev, "cipher data ready@AP fail, ret=%d\n", ret);
+ return ret;
+ }
+
+ /* wait for cipher data ready@PMIC */
+ timeout = jiffies + usecs_to_jiffies(255);
+ do {
+ pwrap_read(wrp, PWRAP_DEW_CIPHER_RDY, &rdata);
+ if (time_after(jiffies, timeout)) {
+ if (timeout_retry) {
+ dev_err(dev, "timeout when waiting for idle\n");
+ return -ETIMEDOUT;
+ }
+ timeout_retry = 1;
+ }
+ } while (rdata != 0x1);
+
+ /* wait for cipher mode idle */
+ pwrap_write(wrp, PWRAP_DEW_CIPHER_MODE, 0x1);
+ ret = wait_for_state_ready(wrp, is_fsm_idle_and_sync_idle,
+ pwrap_base + PWRAP_WACS2_RDATA, NULL, 0);
+ if (ret) {
+ dev_err(dev, "cipher mode idle fail, ret=%d\n", ret);
+ return ret;
+ }
+
+ writel(1, pwrap_base + PWRAP_CIPHER_MODE);
+ writel(arb_en_backup, pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ /* 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(dev, "rdata=0x%04X\n", rdata);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int pwrap_init_crc(struct pmic_wrapper *wrp)
+{
+ void __iomem *pwrap_base = wrp->pwrap_base;
+
+ if (pwrap_write(wrp, PWRAP_DEW_CRC_EN, 0x1))
+ return -EFAULT;
+
+ writel(0x1, pwrap_base + PWRAP_CRC_EN);
+ writel(0x0, pwrap_base + PWRAP_SIG_MODE);
+ writel(PWRAP_DEW_CRC_VAL, pwrap_base + PWRAP_SIG_ADR);
+
+ return 0;
+}
+
+static int pwrap_enable_wacs(struct pmic_wrapper *wrp)
+{
+ void __iomem *pwrap_base = wrp->pwrap_base;
+
+ writel(0x1ff, pwrap_base + PWRAP_HIPRIO_ARB_EN);
+ writel(0x7, pwrap_base + PWRAP_RRARB_EN);
+ writel(0x1, pwrap_base + PWRAP_WACS0_EN);
+ writel(0x1, pwrap_base + PWRAP_WACS1_EN);
+ writel(0x1, pwrap_base + PWRAP_WACS2_EN);
+ writel(0x5, pwrap_base + PWRAP_STAUPD_PRD);
+ writel(0xff, pwrap_base + PWRAP_STAUPD_GRPEN);
+ writel(0xf, pwrap_base + PWRAP_WDT_UNIT);
+ writel(0xffffffff, pwrap_base + PWRAP_WDT_SRC_EN);
+ writel(0x1, pwrap_base + PWRAP_TIMER_EN);
+ writel(~((1 << 31) | (1 << 1)), pwrap_base + PWRAP_INT_EN);
+
+ return 0;
+}
+
+static int pwrap_enable_event_bridge(struct pmic_wrapper *wrp)
+{
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ void __iomem *pwrap_bridge_base = wrp->pwrap_bridge_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ /* enable pwrap events and pwrap bridge in AP side */
+ writel(0x1, pwrap_base + PWRAP_EVENT_IN_EN);
+ writel(0xffff, pwrap_base + PWRAP_EVENT_DST_EN);
+ writel(0x7f, pwrap_bridge_base + PWRAP_BRIDGE_IORD_ARB_EN);
+ writel(0x1, pwrap_bridge_base + PWRAP_BRIDGE_WACS3_EN);
+ writel(0x1, pwrap_bridge_base + PWRAP_BRIDGE_WACS4_EN);
+ writel(0x1, pwrap_bridge_base + PWRAP_BRIDGE_WDT_UNIT);
+ writel(0xffff, pwrap_bridge_base + PWRAP_BRIDGE_WDT_SRC_EN);
+ writel(0x1, pwrap_bridge_base + PWRAP_BRIDGE_TIMER_EN);
+ writel(0x7ff, pwrap_bridge_base + PWRAP_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(dev, "enable dewrap fail\n");
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int pwrap_switch_event_pin(struct pmic_wrapper *wrp)
+{
+ u32 rdata;
+ struct device *dev = &wrp->pdev->dev;
+
+ /* switch event pin from usbdl mode to normal mode @ MT6397 */
+ if (pwrap_read(wrp, MT6397_TOP_CKCON3, &rdata) ||
+ pwrap_write(wrp, MT6397_TOP_CKCON3, (rdata & 0x0007))) {
+ dev_err(dev, "switch event pin fail\n");
+ return -EFAULT;
+ }
+
+ return 0;
+};
+
+static int pwrap_init_done(struct pmic_wrapper *wrp)
+{
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ void __iomem *pwrap_bridge_base = wrp->pwrap_bridge_base;
+
+ writel(1, pwrap_base + PWRAP_INIT_DONE2);
+ writel(1, pwrap_base + PWRAP_INIT_DONE0);
+ writel(1, pwrap_base + PWRAP_INIT_DONE1);
+ writel(1, pwrap_bridge_base + PWRAP_BRIDGE_INIT_DONE3);
+ writel(1, pwrap_bridge_base + PWRAP_BRIDGE_INIT_DONE4);
+
+ return 0;
+}
+
+static int pwrap_init(struct pmic_wrapper *wrp)
+{
+ int ret;
+
+ /* Reset pwrap and pwrap bridge in infracfg and perifcfg. */
+ ret = pwrap_reset(wrp);
+ if (ret)
+ return ret;
+
+ /* Set SPI_CK frequency = 26MHz */
+ ret = pwrap_set_clock(wrp);
+ if (ret)
+ return ret;
+
+ /* Reset SPI slave */
+ ret = pwrap_reset_spislv(wrp);
+ if (ret)
+ return ret;
+
+ /* Setup serial input delay */
+ ret = pwrap_init_sidly(wrp);
+ if (ret)
+ return ret;
+
+ /* SPI Waveform Configuration 0:safe mode, 1:18MHz, 2:26MHz */
+ ret = pwrap_init_reg_clock(wrp, 2);
+ if (ret)
+ return ret;
+
+ /* Enable dual IO mode */
+ ret = pwrap_init_dio(wrp, 1);
+ if (ret)
+ return ret;
+
+ /* Enable encryption */
+ ret = pwrap_init_cipher(wrp);
+ if (ret)
+ return ret;
+
+ /* Signature checking - using CRC */
+ ret = pwrap_init_crc(wrp);
+ if (ret)
+ return ret;
+
+ /* Enable all wrapper access */
+ ret = pwrap_enable_wacs(wrp);
+ if (ret)
+ return ret;
+
+ /* Switch event pin from usbdl mode to normal mode */
+ ret = pwrap_switch_event_pin(wrp);
+ if (ret)
+ return ret;
+
+ /* Enable evnts and pwrap bridge */
+ ret = pwrap_enable_event_bridge(wrp);
+ if (ret)
+ return ret;
+
+ /* Setup the init done registers */
+ ret = pwrap_init_done(wrp);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int pwrap_iomap_init(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct pmic_wrapper *wrp = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwrap-base");
+ if (!res) {
+ dev_err(dev, "could not get pwrap-base resource\n");
+ return -ENODEV;
+ }
+ wrp->pwrap_base = devm_ioremap(dev, res->start, resource_size(res));
+ if (!wrp->pwrap_base) {
+ dev_err(dev, "could not get pwrap_base\n");
+ return -ENOMEM;
+ }
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "pwrap-bridge-base");
+ if (!res) {
+ dev_err(dev, "could not get pwrap-bridge-base resource\n");
+ return -ENODEV;
+ }
+ wrp->pwrap_bridge_base = devm_ioremap(dev, res->start,
+ resource_size(res));
+ if (!wrp->pwrap_bridge_base) {
+ dev_err(dev, "could not get pwrap_bridge_base\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int pwrap_check_and_init(struct pmic_wrapper *wrp)
+{
+ int ret;
+ u32 rdata;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ rdata = readl(pwrap_base + PWRAP_INIT_DONE2);
+ if (rdata)
+ goto done;
+
+ ret = pwrap_init(wrp);
+ if (ret) {
+ dev_err(dev, "PMIC wrapper init error, ret=%d\n", ret);
+ return ret;
+ }
+
+done:
+ rdata = readl(pwrap_base + PWRAP_WACS2_RDATA);
+ if (!(rdata & PWRAP_STATE_INIT_DONE0)) {
+ dev_err(dev, "initialization isn't finished\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static irqreturn_t pwrap_interrupt(int irqno, void *dev_id)
+{
+ u32 rdata;
+ struct pmic_wrapper *wrp = dev_id;
+ void __iomem *pwrap_base = wrp->pwrap_base;
+ struct device *dev = &wrp->pdev->dev;
+
+ rdata = readl(pwrap_base + PWRAP_INT_FLG);
+ dev_err(dev, "unexpected interrupt int=0x%x\n", rdata);
+
+ writel(0x8, pwrap_base + PWRAP_HARB_HPRIO);
+ writel(0xffffffff, pwrap_base + PWRAP_INT_CLR);
+
+ return IRQ_HANDLED;
+}
+
+const struct regmap_config pwrap_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 16,
+ .reg_read = pwrap_regmap_read,
+ .reg_write = pwrap_regmap_write,
+};
+
+static int pwrap_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct pmic_wrapper *wrp;
+ int irq;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = pdev->dev.of_node;
+
+ wrp = devm_kzalloc(dev, sizeof(struct pmic_wrapper), GFP_KERNEL);
+ if (!wrp)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, wrp);
+
+ ret = pwrap_iomap_init(pdev);
+ if (ret) {
+ dev_err(dev, "pwrap_iomap_init, ret=%d\n", ret);
+ return ret;
+ }
+
+ wrp->pdev = pdev;
+ ret = pwrap_check_and_init(wrp);
+ if (ret) {
+ dev_err(dev, "PMIC wrapper HW init failed=%d\n", ret);
+ return ret;
+ }
+
+ /* Register pwrap irq to catch interrupt when pwrap behaves abnormal. */
+ irq = platform_get_irq(pdev, 0);
+ ret = devm_request_threaded_irq(dev, irq,
+ pwrap_interrupt, NULL,
+ IRQF_TRIGGER_HIGH, "mt8135-pwrap", wrp);
+ if (ret) {
+ dev_err(dev, "Register IRQ failed, ret=%d\n", ret);
+ return ret;
+ }
+
+ wrp->regmap = devm_regmap_init(dev, NULL, wrp, &pwrap_regmap_config);
+ if (IS_ERR(wrp->regmap)) {
+ ret = PTR_ERR(wrp->regmap);
+ dev_err(dev, "Failed to allocate register map, ret=%d\n",
+ ret);
+ return ret;
+ }
+
+ ret = of_platform_populate(np, NULL, NULL, dev);
+ if (ret) {
+ dev_err(dev, "%s fail to create devices\n", np->full_name);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct of_device_id of_pwrap_match_tbl[] = {
+ {.compatible = "mediatek,mt8135-pwrap",},
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_pwrap_match_tbl);
+
+static struct platform_driver pwrap_drv = {
+ .driver = {
+ .name = "mt8135-pwrap",
+ .of_match_table = of_match_ptr(of_pwrap_match_tbl),
+ },
+ .probe = pwrap_probe,
+};
+
+module_platform_driver(pwrap_drv);
+
+MODULE_AUTHOR("Flora Fu <flora.fu@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("MediaTek MT8135 PMIC Wrapper Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/soc/mediatek/mt8135-pmic-wrap.h b/drivers/soc/mediatek/mt8135-pmic-wrap.h
new file mode 100644
index 0000000..6e79a0a
--- /dev/null
+++ b/drivers/soc/mediatek/mt8135-pmic-wrap.h
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ * Author: Flora Fu <flora.fu@xxxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef __PMIC_WRAP_REGS_H__
+#define __PMIC_WRAP_REGS_H__
+
+/* macro for wrapper registers */
+#define PWRAP_MUX_SEL 0x0
+#define PWRAP_WRAP_EN 0x4
+#define PWRAP_DIO_EN 0x8
+#define PWRAP_SIDLY 0xC
+#define PWRAP_CSHEXT 0x10
+#define PWRAP_CSHEXT_WRITE 0x14
+#define PWRAP_CSHEXT_READ 0x18
+#define PWRAP_CSLEXT_START 0x1C
+#define PWRAP_CSLEXT_END 0x20
+#define PWRAP_STAUPD_PRD 0x24
+#define PWRAP_STAUPD_GRPEN 0x28
+#define PWRAP_STAUPD_MAN_TRIG 0x2C
+#define PWRAP_STAUPD_STA 0x30
+#define PWRAP_EVENT_IN_EN 0x34
+#define PWRAP_EVENT_DST_EN 0x38
+#define PWRAP_WRAP_STA 0x3C
+#define PWRAP_RRARB_INIT 0x40
+#define PWRAP_RRARB_EN 0x44
+#define PWRAP_RRARB_STA0 0x48
+#define PWRAP_RRARB_STA1 0x4C
+#define PWRAP_HARB_INIT 0x50
+#define PWRAP_HARB_HPRIO 0x54
+#define PWRAP_HIPRIO_ARB_EN 0x58
+#define PWRAP_HARB_STA0 0x5C
+#define PWRAP_HARB_STA1 0x60
+#define PWRAP_MAN_EN 0x64
+#define PWRAP_MAN_CMD 0x68
+#define PWRAP_MAN_RDATA 0x6C
+#define PWRAP_MAN_VLDCLR 0x70
+#define PWRAP_WACS0_EN 0x74
+#define PWRAP_INIT_DONE0 0x78
+#define PWRAP_WACS0_CMD 0x7C
+#define PWRAP_WACS0_RDATA 0x80
+#define PWRAP_WACS0_VLDCLR 0x84
+#define PWRAP_WACS1_EN 0x88
+#define PWRAP_INIT_DONE1 0x8C
+#define PWRAP_WACS1_CMD 0x90
+#define PWRAP_WACS1_RDATA 0x94
+#define PWRAP_WACS1_VLDCLR 0x98
+#define PWRAP_WACS2_EN 0x9C
+#define PWRAP_INIT_DONE2 0xA0
+#define PWRAP_WACS2_CMD 0xA4
+#define PWRAP_WACS2_RDATA 0xA8
+#define PWRAP_WACS2_VLDCLR 0xAC
+#define PWRAP_INT_EN 0xB0
+#define PWRAP_INT_FLG_RAW 0xB4
+#define PWRAP_INT_FLG 0xB8
+#define PWRAP_INT_CLR 0xBC
+#define PWRAP_SIG_ADR 0xC0
+#define PWRAP_SIG_MODE 0xC4
+#define PWRAP_SIG_VALUE 0xC8
+#define PWRAP_SIG_ERRVAL 0xCC
+#define PWRAP_CRC_EN 0xD0
+#define PWRAP_EVENT_STA 0xD4
+#define PWRAP_EVENT_STACLR 0xD8
+#define PWRAP_TIMER_EN 0xDC
+#define PWRAP_TIMER_STA 0xE0
+#define PWRAP_WDT_UNIT 0xE4
+#define PWRAP_WDT_SRC_EN 0xE8
+#define PWRAP_WDT_FLG 0xEC
+#define PWRAP_DEBUG_INT_SEL 0xF0
+#define PWRAP_CIPHER_KEY_SEL 0x134
+#define PWRAP_CIPHER_IV_SEL 0x138
+#define PWRAP_CIPHER_LOAD 0x13C
+#define PWRAP_CIPHER_START 0x140
+#define PWRAP_CIPHER_RDY 0x144
+#define PWRAP_CIPHER_MODE 0x148
+#define PWRAP_CIPHER_SWRST 0x14C
+#define PWRAP_DCM_EN 0x15C
+#define PWRAP_DCM_DBC_PRD 0x160
+
+/* macro for wrapper bridge registers */
+#define PWRAP_BRIDGE_IARB_INIT 0x0
+#define PWRAP_BRIDGE_IORD_ARB_EN 0x4
+#define PWRAP_BRIDGE_IARB_STA0 0x8
+#define PWRAP_BRIDGE_IARB_STA1 0xC
+#define PWRAP_BRIDGE_WACS3_EN 0x10
+#define PWRAP_BRIDGE_INIT_DONE3 0x14
+#define PWRAP_BRIDGE_WACS3_CMD 0x18
+#define PWRAP_BRIDGE_WACS3_RDATA 0x1C
+#define PWRAP_BRIDGE_WACS3_VLDCLR 0x20
+#define PWRAP_BRIDGE_WACS4_EN 0x24
+#define PWRAP_BRIDGE_INIT_DONE4 0x28
+#define PWRAP_BRIDGE_WACS4_CMD 0x2C
+#define PWRAP_BRIDGE_WACS4_RDATA 0x30
+#define PWRAP_BRIDGE_WACS4_VLDCLR 0x34
+#define PWRAP_BRIDGE_INT_EN 0x38
+#define PWRAP_BRIDGE_INT_FLG_RAW 0x3C
+#define PWRAP_BRIDGE_INT_FLG 0x40
+#define PWRAP_BRIDGE_INT_CLR 0x44
+#define PWRAP_BRIDGE_TIMER_EN 0x48
+#define PWRAP_BRIDGE_TIMER_STA 0x4C
+#define PWRAP_BRIDGE_WDT_UNIT 0x50
+#define PWRAP_BRIDGE_WDT_SRC_EN 0x54
+#define PWRAP_BRIDGE_WDT_FLG 0x58
+#define PWRAP_BRIDGE_DEBUG_INT_SE 0x5C
+
+/* 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)
+
+#endif /* __PMIC_WRAP_REGS_H__ */
diff --git a/include/linux/soc/mediatek/mtk-pmic-wrap.h b/include/linux/soc/mediatek/mtk-pmic-wrap.h
new file mode 100644
index 0000000..28212a1
--- /dev/null
+++ b/include/linux/soc/mediatek/mtk-pmic-wrap.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ * Author: Flora Fu <flora.fu@xxxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef __MTK_PMIC_WRAP_H__
+#define __MTK_PMIC_WRAP_H__
+
+struct pmic_wrapper {
+ struct platform_device *pdev;
+ struct regmap *regmap;
+ void __iomem *pwrap_base;
+ void __iomem *pwrap_bridge_base;
+};
+
+#endif /* __MTK_PMIC_WRAP_H__ */
--
1.8.1.1.dirty

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