blob: ca4005c7fbc03e37a9696f620cb070c63ed6ba58 [file] [log] [blame]
/*
* Copyright 2012-2016 Freescale Semiconductor, Inc.
* Copyright 2017 NXP
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include "ci_hdrc_imx.h"
#define MX25_USB_PHY_CTRL_OFFSET 0x08
#define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23)
#define MX25_EHCI_INTERFACE_SINGLE_UNI (2 << 0)
#define MX25_EHCI_INTERFACE_DIFF_UNI (0 << 0)
#define MX25_EHCI_INTERFACE_MASK (0xf)
#define MX25_OTG_SIC_SHIFT 29
#define MX25_OTG_SIC_MASK (0x3 << MX25_OTG_SIC_SHIFT)
#define MX25_OTG_PM_BIT BIT(24)
#define MX25_OTG_PP_BIT BIT(11)
#define MX25_OTG_OCPOL_BIT BIT(3)
#define MX25_H1_SIC_SHIFT 21
#define MX25_H1_SIC_MASK (0x3 << MX25_H1_SIC_SHIFT)
#define MX25_H1_PP_BIT BIT(18)
#define MX25_H1_PM_BIT BIT(16)
#define MX25_H1_IPPUE_UP_BIT BIT(7)
#define MX25_H1_IPPUE_DOWN_BIT BIT(6)
#define MX25_H1_TLL_BIT BIT(5)
#define MX25_H1_USBTE_BIT BIT(4)
#define MX25_H1_OCPOL_BIT BIT(2)
#define MX27_H1_PM_BIT BIT(8)
#define MX27_H2_PM_BIT BIT(16)
#define MX27_OTG_PM_BIT BIT(24)
#define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08
#define MX53_USB_OTG_PHY_CTRL_1_OFFSET 0x0c
#define MX53_USB_CTRL_1_OFFSET 0x10
#define MX53_USB_CTRL_1_H2_XCVR_CLK_SEL_MASK (0x11 << 2)
#define MX53_USB_CTRL_1_H2_XCVR_CLK_SEL_ULPI BIT(2)
#define MX53_USB_CTRL_1_H3_XCVR_CLK_SEL_MASK (0x11 << 6)
#define MX53_USB_CTRL_1_H3_XCVR_CLK_SEL_ULPI BIT(6)
#define MX53_USB_UH2_CTRL_OFFSET 0x14
#define MX53_USB_UH3_CTRL_OFFSET 0x18
#define MX53_USB_CLKONOFF_CTRL_OFFSET 0x24
#define MX53_USB_CLKONOFF_CTRL_H2_INT60CKOFF BIT(21)
#define MX53_USB_CLKONOFF_CTRL_H3_INT60CKOFF BIT(22)
#define MX53_BM_OVER_CUR_DIS_H1 BIT(5)
#define MX53_BM_OVER_CUR_DIS_OTG BIT(8)
#define MX53_BM_OVER_CUR_DIS_UHx BIT(30)
#define MX53_USB_CTRL_1_UH2_ULPI_EN BIT(26)
#define MX53_USB_CTRL_1_UH3_ULPI_EN BIT(27)
#define MX53_USB_UHx_CTRL_WAKE_UP_EN BIT(7)
#define MX53_USB_UHx_CTRL_ULPI_INT_EN BIT(8)
#define MX53_USB_PHYCTRL1_PLLDIV_MASK 0x3
#define MX53_USB_PLL_DIV_24_MHZ 0x01
#define MX6_BM_NON_BURST_SETTING BIT(1)
#define MX6_BM_OVER_CUR_DIS BIT(7)
#define MX6_BM_OVER_CUR_POLARITY BIT(8)
#define MX6_BM_PRW_POLARITY BIT(9)
#define MX6_BM_WAKEUP_ENABLE BIT(10)
#define MX6_BM_UTMI_ON_CLOCK BIT(13)
#define MX6_BM_ID_WAKEUP BIT(16)
#define MX6_BM_VBUS_WAKEUP BIT(17)
#define MX6SX_BM_DPDM_WAKEUP_EN BIT(29)
#define MX6_BM_WAKEUP_INTR BIT(31)
#define MX6_USB_HSIC_CTRL_OFFSET 0x10
/* Send resume signal without 480Mhz PHY clock */
#define MX6SX_BM_HSIC_AUTO_RESUME BIT(23)
/* set before portsc.suspendM = 1 */
#define MX6_BM_HSIC_DEV_CONN BIT(21)
/* HSIC enable */
#define MX6_BM_HSIC_EN BIT(12)
/* Force HSIC module 480M clock on, even when in Host is in suspend mode */
#define MX6_BM_HSIC_CLK_ON BIT(11)
#define MX6_USB_OTG1_PHY_CTRL 0x18
/* For imx6dql, it is host-only controller, for later imx6, it is otg's */
#define MX6_USB_OTG2_PHY_CTRL 0x1c
#define MX6SX_USB_VBUS_WAKEUP_SOURCE(v) (v << 8)
#define MX6SX_USB_VBUS_WAKEUP_SOURCE_VBUS MX6SX_USB_VBUS_WAKEUP_SOURCE(0)
#define MX6SX_USB_VBUS_WAKEUP_SOURCE_AVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(1)
#define MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(2)
#define MX6SX_USB_VBUS_WAKEUP_SOURCE_SESS_END MX6SX_USB_VBUS_WAKEUP_SOURCE(3)
#define VF610_OVER_CUR_DIS BIT(7)
#define MX7D_USBNC_USB_CTRL2 0x4
/* The default DM/DP value is pull-down */
#define MX7D_USBNC_USB_CTRL2_DM_OVERRIDE_EN BIT(15)
#define MX7D_USBNC_USB_CTRL2_DM_OVERRIDE_VAL BIT(14)
#define MX7D_USBNC_USB_CTRL2_DP_OVERRIDE_EN BIT(13)
#define MX7D_USBNC_USB_CTRL2_DP_OVERRIDE_VAL BIT(12)
#define MX7D_USBNC_USB_CTRL2_DP_DM_MASK (BIT(12) | BIT(13) | \
BIT(14) | BIT(15))
#define MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_EN BIT(8)
#define MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_MASK (BIT(7) | BIT(6))
#define MX7D_USBNC_USB_CTRL2_OPMODE(v) (v << 6)
#define MX7D_USBNC_USB_CTRL2_OPMODE_NON_DRIVING MX7D_USBNC_USB_CTRL2_OPMODE(1)
#define MX7D_USBNC_USB_CTRL2_TERMSEL_OVERRIDE_EN BIT(5)
#define MX7D_USBNC_USB_CTRL2_TERMSEL_OVERRIDE_VAL BIT(4)
#define MX7D_USBNC_AUTO_RESUME BIT(2)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_MASK 0x3
#define MX7D_USB_VBUS_WAKEUP_SOURCE(v) (v << 0)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_VBUS MX7D_USB_VBUS_WAKEUP_SOURCE(0)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_AVALID MX7D_USB_VBUS_WAKEUP_SOURCE(1)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID MX7D_USB_VBUS_WAKEUP_SOURCE(2)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_SESS_END MX7D_USB_VBUS_WAKEUP_SOURCE(3)
#define MX7D_USB_TERMSEL_OVERRIDE BIT(4)
#define MX7D_USB_TERMSEL_OVERRIDE_EN BIT(5)
#define MX7D_USB_OTG_PHY_CFG1 0x30
#define TXPREEMPAMPTUNE0_BIT 28
#define TXPREEMPAMPTUNE0_MASK (3 << 28)
#define TXVREFTUNE0_BIT 20
#define TXVREFTUNE0_MASK (0xf << 20)
#define MX7D_USB_OTG_PHY_CFG2_CHRG_DCDENB BIT(3)
#define MX7D_USB_OTG_PHY_CFG2_CHRG_VDATSRCENB0 BIT(2)
#define MX7D_USB_OTG_PHY_CFG2_CHRG_VDATDETENB0 BIT(1)
#define MX7D_USB_OTG_PHY_CFG2_CHRG_CHRGSEL BIT(0)
#define MX7D_USB_OTG_PHY_CFG2 0x34
#define MX7D_USB_OTG_PHY_STATUS 0x3c
#define MX7D_USB_OTG_PHY_STATUS_CHRGDET BIT(29)
#define MX7D_USB_OTG_PHY_STATUS_VBUS_VLD BIT(3)
#define MX7D_USB_OTG_PHY_STATUS_LINE_STATE1 BIT(1)
#define MX7D_USB_OTG_PHY_STATUS_LINE_STATE0 BIT(0)
#define ANADIG_ANA_MISC0 0x150
#define ANADIG_ANA_MISC0_SET 0x154
#define ANADIG_ANA_MISC0_CLK_DELAY(x) ((x >> 26) & 0x7)
#define ANADIG_USB1_CHRG_DETECT_SET 0x1b4
#define ANADIG_USB1_CHRG_DETECT_CLR 0x1b8
#define ANADIG_USB1_CHRG_DETECT_EN_B BIT(20)
#define ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B BIT(19)
#define ANADIG_USB1_CHRG_DETECT_CHK_CONTACT BIT(18)
#define ANADIG_USB1_VBUS_DET_STAT 0x1c0
#define ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3)
#define ANADIG_USB1_CHRG_DET_STAT 0x1d0
#define ANADIG_USB1_CHRG_DET_STAT_DM_STATE BIT(2)
#define ANADIG_USB1_CHRG_DET_STAT_CHRG_DETECTED BIT(1)
#define ANADIG_USB1_CHRG_DET_STAT_PLUG_CONTACT BIT(0)
struct usbmisc_ops {
/* It's called once when probe a usb device */
int (*init)(struct imx_usbmisc_data *data);
/* It's called once after adding a usb device */
int (*post)(struct imx_usbmisc_data *data);
/* It's called when we need to enable/disable usb wakeup */
int (*set_wakeup)(struct imx_usbmisc_data *data, bool enabled);
/* usb charger detection */
int (*charger_detection)(struct imx_usbmisc_data *data);
/* It's called when system resume from usb power lost */
int (*power_lost_check)(struct imx_usbmisc_data *data);
/* It's called before setting portsc.suspendM */
int (*hsic_set_connect)(struct imx_usbmisc_data *data);
/* It's called during suspend/resume */
int (*hsic_set_clk)(struct imx_usbmisc_data *data, bool enabled);
/* override UTMI termination select */
int (*term_select_override)(struct imx_usbmisc_data *data,
bool enable, int val);
};
struct imx_usbmisc {
void __iomem *base;
spinlock_t lock;
const struct usbmisc_ops *ops;
struct mutex mutex;
};
static struct regulator *vbus_wakeup_reg;
static inline bool is_imx53_usbmisc(struct imx_usbmisc_data *data);
static int usbmisc_imx25_init(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 val = 0;
if (data->index > 1)
return -EINVAL;
spin_lock_irqsave(&usbmisc->lock, flags);
switch (data->index) {
case 0:
val = readl(usbmisc->base);
val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT);
val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT;
val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT);
writel(val, usbmisc->base);
break;
case 1:
val = readl(usbmisc->base);
val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT | MX25_H1_IPPUE_UP_BIT);
val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT;
val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT |
MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT);
writel(val, usbmisc->base);
break;
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
return 0;
}
static int usbmisc_imx25_post(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
void __iomem *reg;
unsigned long flags;
u32 val;
if (data->index > 2)
return -EINVAL;
if (data->evdo) {
spin_lock_irqsave(&usbmisc->lock, flags);
reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
val = readl(reg);
writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg);
spin_unlock_irqrestore(&usbmisc->lock, flags);
usleep_range(5000, 10000); /* needed to stabilize voltage */
}
return 0;
}
static int usbmisc_imx27_init(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 val;
switch (data->index) {
case 0:
val = MX27_OTG_PM_BIT;
break;
case 1:
val = MX27_H1_PM_BIT;
break;
case 2:
val = MX27_H2_PM_BIT;
break;
default:
return -EINVAL;
}
spin_lock_irqsave(&usbmisc->lock, flags);
if (data->disable_oc)
val = readl(usbmisc->base) | val;
else
val = readl(usbmisc->base) & ~val;
writel(val, usbmisc->base);
spin_unlock_irqrestore(&usbmisc->lock, flags);
return 0;
}
static int usbmisc_imx53_init(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
void __iomem *reg = NULL;
unsigned long flags;
u32 val = 0;
if (data->index > 3)
return -EINVAL;
/* Select a 24 MHz reference clock for the PHY */
val = readl(usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK;
val |= MX53_USB_PLL_DIV_24_MHZ;
writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
spin_lock_irqsave(&usbmisc->lock, flags);
switch (data->index) {
case 0:
if (data->disable_oc) {
reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
writel(val, reg);
}
break;
case 1:
if (data->disable_oc) {
reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
writel(val, reg);
}
break;
case 2:
if (data->ulpi) {
/* set USBH2 into ULPI-mode. */
reg = usbmisc->base + MX53_USB_CTRL_1_OFFSET;
val = readl(reg) | MX53_USB_CTRL_1_UH2_ULPI_EN;
/* select ULPI clock */
val &= ~MX53_USB_CTRL_1_H2_XCVR_CLK_SEL_MASK;
val |= MX53_USB_CTRL_1_H2_XCVR_CLK_SEL_ULPI;
writel(val, reg);
/* Set interrupt wake up enable */
reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
val = readl(reg) | MX53_USB_UHx_CTRL_WAKE_UP_EN
| MX53_USB_UHx_CTRL_ULPI_INT_EN;
writel(val, reg);
if (is_imx53_usbmisc(data)) {
/* Disable internal 60Mhz clock */
reg = usbmisc->base +
MX53_USB_CLKONOFF_CTRL_OFFSET;
val = readl(reg) |
MX53_USB_CLKONOFF_CTRL_H2_INT60CKOFF;
writel(val, reg);
}
}
if (data->disable_oc) {
reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
writel(val, reg);
}
break;
case 3:
if (data->ulpi) {
/* set USBH3 into ULPI-mode. */
reg = usbmisc->base + MX53_USB_CTRL_1_OFFSET;
val = readl(reg) | MX53_USB_CTRL_1_UH3_ULPI_EN;
/* select ULPI clock */
val &= ~MX53_USB_CTRL_1_H3_XCVR_CLK_SEL_MASK;
val |= MX53_USB_CTRL_1_H3_XCVR_CLK_SEL_ULPI;
writel(val, reg);
/* Set interrupt wake up enable */
reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
val = readl(reg) | MX53_USB_UHx_CTRL_WAKE_UP_EN
| MX53_USB_UHx_CTRL_ULPI_INT_EN;
writel(val, reg);
if (is_imx53_usbmisc(data)) {
/* Disable internal 60Mhz clock */
reg = usbmisc->base +
MX53_USB_CLKONOFF_CTRL_OFFSET;
val = readl(reg) |
MX53_USB_CLKONOFF_CTRL_H3_INT60CKOFF;
writel(val, reg);
}
}
if (data->disable_oc) {
reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
writel(val, reg);
}
break;
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
return 0;
}
static int usbmisc_imx6_hsic_set_connect(struct imx_usbmisc_data *data)
{
unsigned long flags;
u32 val, offset;
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
int ret = 0;
spin_lock_irqsave(&usbmisc->lock, flags);
if (data->index == 2 || data->index == 3) {
offset = (data->index - 2) * 4;
} else if (data->index == 0) {
/*
* For controllers later than imx7d (imx7d is included),
* each controller has its own non core register region.
* And the controllers before than imx7d, the 1st controller
* is not HSIC controller.
*/
offset = 0;
} else {
dev_err(data->dev, "index is error for usbmisc\n");
offset = 0;
ret = -EINVAL;
}
val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
if (!(val & MX6_BM_HSIC_DEV_CONN))
writel(val | MX6_BM_HSIC_DEV_CONN,
usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
spin_unlock_irqrestore(&usbmisc->lock, flags);
return ret;
}
static int usbmisc_imx6_hsic_set_clk(struct imx_usbmisc_data *data, bool on)
{
unsigned long flags;
u32 val, offset;
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
int ret = 0;
spin_lock_irqsave(&usbmisc->lock, flags);
if (data->index == 2 || data->index == 3) {
offset = (data->index - 2) * 4;
} else if (data->index == 0) {
offset = 0;
} else {
dev_err(data->dev, "index is error for usbmisc\n");
offset = 0;
ret = -EINVAL;
}
val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
val |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
if (on)
val |= MX6_BM_HSIC_CLK_ON;
else
val &= ~MX6_BM_HSIC_CLK_ON;
writel(val, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
spin_unlock_irqrestore(&usbmisc->lock, flags);
return 0;
}
static u32 imx6q_finalize_wakeup_setting(struct imx_usbmisc_data *data)
{
if (data->available_role == USB_DR_MODE_PERIPHERAL)
return MX6_BM_VBUS_WAKEUP;
else if (data->available_role == USB_DR_MODE_OTG)
return MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP;
return 0;
}
static int usbmisc_imx6q_set_wakeup
(struct imx_usbmisc_data *data, bool enabled)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
int ret = 0;
u32 val, wakeup_setting = MX6_BM_WAKEUP_ENABLE;
if (data->index > 3)
return -EINVAL;
spin_lock_irqsave(&usbmisc->lock, flags);
val = readl(usbmisc->base + data->index * 4);
if (enabled) {
wakeup_setting |= imx6q_finalize_wakeup_setting(data);
writel(val | wakeup_setting, usbmisc->base + data->index * 4);
spin_unlock_irqrestore(&usbmisc->lock, flags);
if (vbus_wakeup_reg)
ret = regulator_enable(vbus_wakeup_reg);
} else {
if (val & MX6_BM_WAKEUP_INTR)
pr_debug("wakeup int at ci_hdrc.%d\n", data->index);
wakeup_setting |= MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP;
writel(val & ~wakeup_setting, usbmisc->base + data->index * 4);
spin_unlock_irqrestore(&usbmisc->lock, flags);
if (vbus_wakeup_reg && regulator_is_enabled(vbus_wakeup_reg))
regulator_disable(vbus_wakeup_reg);
}
return ret;
}
static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 reg, val;
if (data->index > 3)
return -EINVAL;
spin_lock_irqsave(&usbmisc->lock, flags);
reg = readl(usbmisc->base + data->index * 4);
if (data->disable_oc) {
reg |= MX6_BM_OVER_CUR_DIS;
} else if (data->oc_polarity == 1) {
/* High active */
reg &= ~(MX6_BM_OVER_CUR_DIS | MX6_BM_OVER_CUR_POLARITY);
}
writel(reg, usbmisc->base + data->index * 4);
/* SoC non-burst setting */
reg = readl(usbmisc->base + data->index * 4);
writel(reg | MX6_BM_NON_BURST_SETTING,
usbmisc->base + data->index * 4);
/* For HSIC controller */
if (data->index == 2 || data->index == 3) {
val = readl(usbmisc->base + data->index * 4);
writel(val | MX6_BM_UTMI_ON_CLOCK,
usbmisc->base + data->index * 4);
val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
+ (data->index - 2) * 4);
val |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
writel(val, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
+ (data->index - 2) * 4);
/*
* Need to add delay to wait 24M OSC to be stable,
* It is board specific.
*/
regmap_read(data->anatop, ANADIG_ANA_MISC0, &val);
/* 0 <= data->osc_clkgate_delay <= 7 */
if (data->osc_clkgate_delay > ANADIG_ANA_MISC0_CLK_DELAY(val))
regmap_write(data->anatop, ANADIG_ANA_MISC0_SET,
(data->osc_clkgate_delay) << 26);
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
usbmisc_imx6q_set_wakeup(data, false);
return 0;
}
static int usbmisc_imx6sx_init(struct imx_usbmisc_data *data)
{
void __iomem *reg = NULL;
unsigned long flags;
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
u32 val;
usbmisc_imx6q_init(data);
spin_lock_irqsave(&usbmisc->lock, flags);
if (data->index == 0 || data->index == 1) {
reg = usbmisc->base + MX6_USB_OTG1_PHY_CTRL + data->index * 4;
/* Set vbus wakeup source as bvalid */
val = readl(reg);
writel(val | MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID, reg);
/*
* Disable dp/dm wakeup in device mode when vbus is
* not there.
*/
val = readl(usbmisc->base + data->index * 4);
writel(val & ~MX6SX_BM_DPDM_WAKEUP_EN,
usbmisc->base + data->index * 4);
}
/* For HSIC controller */
if (data->index == 2) {
val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
+ (data->index - 2) * 4);
val |= MX6SX_BM_HSIC_AUTO_RESUME;
writel(val, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
+ (data->index - 2) * 4);
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
return 0;
}
static int usbmisc_vf610_init(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
u32 reg;
/*
* Vybrid only has one misc register set, but in two different
* areas. These is reflected in two instances of this driver.
*/
if (data->index >= 1)
return -EINVAL;
if (data->disable_oc) {
reg = readl(usbmisc->base);
writel(reg | VF610_OVER_CUR_DIS, usbmisc->base);
}
return 0;
}
static int usbmisc_imx7d_set_wakeup
(struct imx_usbmisc_data *data, bool enabled)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 val;
u32 wakeup_setting = MX6_BM_WAKEUP_ENABLE;
spin_lock_irqsave(&usbmisc->lock, flags);
val = readl(usbmisc->base);
if (enabled) {
wakeup_setting |= imx6q_finalize_wakeup_setting(data);
writel(val | wakeup_setting, usbmisc->base);
} else {
if (val & MX6_BM_WAKEUP_INTR)
dev_dbg(data->dev, "wakeup int\n");
wakeup_setting |= MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP;
writel(val & ~wakeup_setting, usbmisc->base);
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
return 0;
}
static int usbmisc_imx7d_init(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 reg;
if (data->index >= 1)
return -EINVAL;
spin_lock_irqsave(&usbmisc->lock, flags);
reg = readl(usbmisc->base);
if (data->disable_oc) {
reg |= MX6_BM_OVER_CUR_DIS;
} else if (data->oc_polarity == 1) {
/* High active */
reg &= ~(MX6_BM_OVER_CUR_DIS | MX6_BM_OVER_CUR_POLARITY);
}
if (data->pwr_polarity)
reg |= MX6_BM_PRW_POLARITY;
writel(reg, usbmisc->base);
/* SoC non-burst setting */
reg = readl(usbmisc->base);
writel(reg | MX6_BM_NON_BURST_SETTING, usbmisc->base);
if (!data->hsic) {
reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
reg &= ~MX7D_USB_VBUS_WAKEUP_SOURCE_MASK;
writel(reg | MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID
| MX7D_USBNC_AUTO_RESUME,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
/* PHY tuning for signal quality */
reg = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG1);
if (data->emp_curr_control && data->emp_curr_control <=
(TXPREEMPAMPTUNE0_MASK >> TXPREEMPAMPTUNE0_BIT)) {
reg &= ~TXPREEMPAMPTUNE0_MASK;
reg |= (data->emp_curr_control << TXPREEMPAMPTUNE0_BIT);
}
if (data->dc_vol_level_adjust && data->dc_vol_level_adjust <=
(TXVREFTUNE0_MASK >> TXVREFTUNE0_BIT)) {
reg &= ~TXVREFTUNE0_MASK;
reg |= (data->dc_vol_level_adjust << TXVREFTUNE0_BIT);
}
writel(reg, usbmisc->base + MX7D_USB_OTG_PHY_CFG1);
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
usbmisc_imx7d_set_wakeup(data, false);
return 0;
}
static int usbmisc_imx7d_power_lost_check(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 val;
spin_lock_irqsave(&usbmisc->lock, flags);
val = readl(usbmisc->base);
spin_unlock_irqrestore(&usbmisc->lock, flags);
/*
* Here use a power on reset value to judge
* if the controller experienced a power lost
*/
if (val == 0x30001000)
return 1;
else
return 0;
}
static int usbmisc_imx6sx_power_lost_check(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 val;
spin_lock_irqsave(&usbmisc->lock, flags);
val = readl(usbmisc->base + data->index * 4);
spin_unlock_irqrestore(&usbmisc->lock, flags);
/*
* Here use a power on reset value to judge
* if the controller experienced a power lost
*/
if (val == 0x30001000)
return 1;
else
return 0;
}
static int imx7d_charger_secondary_detection(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
struct usb_phy *usb_phy = data->usb_phy;
int val, bak_val;
/* Pull up DP */
val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
bak_val = val;
val &= ~MX7D_USBNC_USB_CTRL2_DP_DM_MASK;
val |= MX7D_USBNC_USB_CTRL2_DM_OVERRIDE_EN |
MX7D_USBNC_USB_CTRL2_DP_OVERRIDE_EN;
val |= MX7D_USBNC_USB_CTRL2_TERMSEL_OVERRIDE_EN |
MX7D_USBNC_USB_CTRL2_TERMSEL_OVERRIDE_VAL;
writel(val, usbmisc->base + MX7D_USBNC_USB_CTRL2);
msleep(80);
val = readl(usbmisc->base + MX7D_USB_OTG_PHY_STATUS);
if (val & MX7D_USB_OTG_PHY_STATUS_LINE_STATE1) {
dev_dbg(data->dev, "It is a dedicate charging port\n");
usb_phy->chg_type = DCP_TYPE;
} else {
dev_dbg(data->dev, "It is a charging downstream port\n");
usb_phy->chg_type = CDP_TYPE;
}
writel(bak_val, usbmisc->base + MX7D_USBNC_USB_CTRL2);
return 0;
}
static void imx7_disable_charger_detector(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 val;
spin_lock_irqsave(&usbmisc->lock, flags);
val = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
val &= ~(MX7D_USB_OTG_PHY_CFG2_CHRG_DCDENB |
MX7D_USB_OTG_PHY_CFG2_CHRG_VDATSRCENB0 |
MX7D_USB_OTG_PHY_CFG2_CHRG_VDATDETENB0 |
MX7D_USB_OTG_PHY_CFG2_CHRG_CHRGSEL);
writel(val, usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
/* Set OPMODE to be 2'b00 and disable its override */
val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
val &= ~MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_MASK;
writel(val, usbmisc->base + MX7D_USBNC_USB_CTRL2);
val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
writel(val & ~MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_EN,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
spin_unlock_irqrestore(&usbmisc->lock, flags);
}
static int imx7d_charger_data_contact_detect(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 val;
int i, data_pin_contact_count = 0;
spin_lock_irqsave(&usbmisc->lock, flags);
/* check if vbus is valid */
val = readl(usbmisc->base + MX7D_USB_OTG_PHY_STATUS);
if (!(val & MX7D_USB_OTG_PHY_STATUS_VBUS_VLD)) {
dev_err(data->dev, "vbus is error\n");
spin_unlock_irqrestore(&usbmisc->lock, flags);
return -EINVAL;
}
/*
* - Do not check whether a charger is connected to the USB port
* - Check whether the USB plug has been in contact with each other
*/
val = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
writel(val | MX7D_USB_OTG_PHY_CFG2_CHRG_DCDENB,
usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
spin_unlock_irqrestore(&usbmisc->lock, flags);
/* Check if plug is connected */
for (i = 0; i < 100; i = i + 1) {
val = readl(usbmisc->base + MX7D_USB_OTG_PHY_STATUS);
if (!(val & MX7D_USB_OTG_PHY_STATUS_LINE_STATE0)) {
if (data_pin_contact_count++ > 5)
/* Data pin makes contact */
break;
else
usleep_range(5000, 10000);
} else {
data_pin_contact_count = 0;
usleep_range(5000, 6000);
}
}
if (i == 100) {
dev_err(data->dev,
"VBUS is coming from a dedicated power supply.\n");
imx7_disable_charger_detector(data);
return -ENXIO;
}
return 0;
}
static int imx7d_charger_primary_detection(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
struct usb_phy *usb_phy = data->usb_phy;
unsigned long flags;
u32 val;
int ret;
ret = imx7d_charger_data_contact_detect(data);
if (ret)
return ret;
spin_lock_irqsave(&usbmisc->lock, flags);
/* Set OPMODE to be non-driving mode */
val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
val &= ~MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_MASK;
val |= MX7D_USBNC_USB_CTRL2_OPMODE_NON_DRIVING;
writel(val, usbmisc->base + MX7D_USBNC_USB_CTRL2);
val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
writel(val | MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_EN,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
/*
* - Do check whether a charger is connected to the USB port
* - Do not Check whether the USB plug has been in contact with
* each other
*/
val = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
writel(val | MX7D_USB_OTG_PHY_CFG2_CHRG_VDATSRCENB0 |
MX7D_USB_OTG_PHY_CFG2_CHRG_VDATDETENB0,
usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
spin_unlock_irqrestore(&usbmisc->lock, flags);
usleep_range(1000, 2000);
/* Check if it is a charger */
val = readl(usbmisc->base + MX7D_USB_OTG_PHY_STATUS);
if (!(val & MX7D_USB_OTG_PHY_STATUS_CHRGDET)) {
dev_dbg(data->dev, "It is a stardard downstream port\n");
usb_phy->chg_type = SDP_TYPE;
}
imx7_disable_charger_detector(data);
return 0;
}
static int imx7d_charger_detection(struct imx_usbmisc_data *data)
{
struct usb_phy *usb_phy = data->usb_phy;
int ret;
ret = imx7d_charger_primary_detection(data);
if (ret)
return ret;
if (usb_phy->chg_type != SDP_TYPE)
ret = imx7d_charger_secondary_detection(data);
return ret;
}
static int usbmisc_term_select_override(struct imx_usbmisc_data *data,
bool enable, int val)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 reg;
spin_lock_irqsave(&usbmisc->lock, flags);
reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
if (enable) {
if (val)
writel(reg | MX7D_USB_TERMSEL_OVERRIDE,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
else
writel(reg & ~MX7D_USB_TERMSEL_OVERRIDE,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
writel(reg | MX7D_USB_TERMSEL_OVERRIDE_EN,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
} else {
writel(reg & ~MX7D_USB_TERMSEL_OVERRIDE_EN,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
return 0;
}
static int usbmisc_imx7ulp_init(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
unsigned long flags;
u32 reg;
if (data->index >= 1)
return -EINVAL;
spin_lock_irqsave(&usbmisc->lock, flags);
reg = readl(usbmisc->base);
if (data->disable_oc) {
reg |= MX6_BM_OVER_CUR_DIS;
} else if (data->oc_polarity == 1) {
/* High active */
reg &= ~(MX6_BM_OVER_CUR_DIS | MX6_BM_OVER_CUR_POLARITY);
}
if (data->pwr_polarity)
reg |= MX6_BM_PRW_POLARITY;
writel(reg, usbmisc->base);
/* SoC non-burst setting */
reg = readl(usbmisc->base);
writel(reg | MX6_BM_NON_BURST_SETTING, usbmisc->base);
if (data->hsic) {
reg = readl(usbmisc->base);
writel(reg | MX6_BM_UTMI_ON_CLOCK, usbmisc->base);
reg = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET);
reg |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
writel(reg, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET);
/*
* For non-HSIC controller, the autoresume is enabled
* at MXS PHY driver (usbphy_ctrl bit18).
*/
reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
writel(reg | MX7D_USBNC_AUTO_RESUME,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
} else {
reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
reg &= ~MX7D_USB_VBUS_WAKEUP_SOURCE_MASK;
writel(reg | MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
usbmisc_imx7d_set_wakeup(data, false);
return 0;
}
static const struct usbmisc_ops imx25_usbmisc_ops = {
.init = usbmisc_imx25_init,
.post = usbmisc_imx25_post,
};
static const struct usbmisc_ops imx27_usbmisc_ops = {
.init = usbmisc_imx27_init,
};
static const struct usbmisc_ops imx51_usbmisc_ops = {
.init = usbmisc_imx53_init,
};
static const struct usbmisc_ops imx53_usbmisc_ops = {
.init = usbmisc_imx53_init,
};
static const struct usbmisc_ops imx6q_usbmisc_ops = {
.set_wakeup = usbmisc_imx6q_set_wakeup,
.init = usbmisc_imx6q_init,
.hsic_set_connect = usbmisc_imx6_hsic_set_connect,
.hsic_set_clk = usbmisc_imx6_hsic_set_clk,
};
static const struct usbmisc_ops vf610_usbmisc_ops = {
.init = usbmisc_vf610_init,
};
static const struct usbmisc_ops imx6sx_usbmisc_ops = {
.set_wakeup = usbmisc_imx6q_set_wakeup,
.init = usbmisc_imx6sx_init,
.power_lost_check = usbmisc_imx6sx_power_lost_check,
.hsic_set_connect = usbmisc_imx6_hsic_set_connect,
.hsic_set_clk = usbmisc_imx6_hsic_set_clk,
};
static const struct usbmisc_ops imx7d_usbmisc_ops = {
.init = usbmisc_imx7d_init,
.set_wakeup = usbmisc_imx7d_set_wakeup,
.power_lost_check = usbmisc_imx7d_power_lost_check,
.charger_detection = imx7d_charger_detection,
.term_select_override = usbmisc_term_select_override,
};
static const struct usbmisc_ops imx7ulp_usbmisc_ops = {
.init = usbmisc_imx7ulp_init,
.set_wakeup = usbmisc_imx7d_set_wakeup,
.power_lost_check = usbmisc_imx7d_power_lost_check,
.hsic_set_connect = usbmisc_imx6_hsic_set_connect,
.hsic_set_clk = usbmisc_imx6_hsic_set_clk,
};
static inline bool is_imx53_usbmisc(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
return usbmisc->ops == &imx53_usbmisc_ops;
}
int imx_usbmisc_init(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc;
if (!data)
return 0;
usbmisc = dev_get_drvdata(data->dev);
if (!usbmisc->ops->init)
return 0;
return usbmisc->ops->init(data);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_init);
int imx_usbmisc_init_post(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc;
if (!data)
return 0;
usbmisc = dev_get_drvdata(data->dev);
if (!usbmisc->ops->post)
return 0;
return usbmisc->ops->post(data);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_init_post);
int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled)
{
struct imx_usbmisc *usbmisc;
if (!data)
return 0;
usbmisc = dev_get_drvdata(data->dev);
if (!usbmisc->ops->set_wakeup)
return 0;
return usbmisc->ops->set_wakeup(data, enabled);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_set_wakeup);
int imx_usbmisc_charger_detection(struct imx_usbmisc_data *data, bool connect)
{
struct imx_usbmisc *usbmisc;
struct usb_phy *usb_phy;
int ret = 0;
if (!data)
return -EINVAL;
usbmisc = dev_get_drvdata(data->dev);
usb_phy = data->usb_phy;
if (!usbmisc->ops->charger_detection)
return -ENOTSUPP;
mutex_lock(&usbmisc->mutex);
if (connect) {
ret = usbmisc->ops->charger_detection(data);
if (ret) {
dev_err(data->dev,
"Error occurs during detection: %d\n",
ret);
usb_phy->chg_state = USB_CHARGER_ABSENT;
} else {
usb_phy->chg_state = USB_CHARGER_PRESENT;
}
} else {
usb_phy->chg_state = USB_CHARGER_ABSENT;
usb_phy->chg_type = UNKNOWN_TYPE;
}
mutex_unlock(&usbmisc->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(imx_usbmisc_charger_detection);
int imx_usbmisc_power_lost_check(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc;
if (!data)
return 0;
usbmisc = dev_get_drvdata(data->dev);
if (!usbmisc->ops->power_lost_check)
return 0;
return usbmisc->ops->power_lost_check(data);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_power_lost_check);
int imx_usbmisc_hsic_set_connect(struct imx_usbmisc_data *data)
{
struct imx_usbmisc *usbmisc;
if (!data)
return 0;
usbmisc = dev_get_drvdata(data->dev);
if (!usbmisc->ops->hsic_set_connect || !data->hsic)
return 0;
return usbmisc->ops->hsic_set_connect(data);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_hsic_set_connect);
int imx_usbmisc_hsic_set_clk(struct imx_usbmisc_data *data, bool on)
{
struct imx_usbmisc *usbmisc;
if (!data)
return 0;
usbmisc = dev_get_drvdata(data->dev);
if (!usbmisc->ops->hsic_set_clk || !data->hsic)
return 0;
return usbmisc->ops->hsic_set_clk(data, on);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_hsic_set_clk);
int imx_usbmisc_term_select_override(struct imx_usbmisc_data *data,
bool enable, int val)
{
struct imx_usbmisc *usbmisc;
if (!data)
return 0;
usbmisc = dev_get_drvdata(data->dev);
if (!usbmisc->ops->term_select_override)
return 0;
return usbmisc->ops->term_select_override(data, enable, val);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_term_select_override);
static const struct of_device_id usbmisc_imx_dt_ids[] = {
{
.compatible = "fsl,imx25-usbmisc",
.data = &imx25_usbmisc_ops,
},
{
.compatible = "fsl,imx35-usbmisc",
.data = &imx25_usbmisc_ops,
},
{
.compatible = "fsl,imx27-usbmisc",
.data = &imx27_usbmisc_ops,
},
{
.compatible = "fsl,imx51-usbmisc",
.data = &imx51_usbmisc_ops,
},
{
.compatible = "fsl,imx53-usbmisc",
.data = &imx53_usbmisc_ops,
},
{
.compatible = "fsl,imx6q-usbmisc",
.data = &imx6q_usbmisc_ops,
},
{
.compatible = "fsl,vf610-usbmisc",
.data = &vf610_usbmisc_ops,
},
{
.compatible = "fsl,imx6sx-usbmisc",
.data = &imx6sx_usbmisc_ops,
},
{
.compatible = "fsl,imx6ul-usbmisc",
.data = &imx6sx_usbmisc_ops,
},
{
.compatible = "fsl,imx7d-usbmisc",
.data = &imx7d_usbmisc_ops,
},
{
.compatible = "fsl,imx7ulp-usbmisc",
.data = &imx7ulp_usbmisc_ops,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids);
static int usbmisc_imx_probe(struct platform_device *pdev)
{
struct resource *res;
struct imx_usbmisc *data;
const struct of_device_id *of_id;
of_id = of_match_device(usbmisc_imx_dt_ids, &pdev->dev);
if (!of_id)
return -ENODEV;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
spin_lock_init(&data->lock);
mutex_init(&data->mutex);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
data->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(data->base))
return PTR_ERR(data->base);
data->ops = (const struct usbmisc_ops *)of_id->data;
platform_set_drvdata(pdev, data);
vbus_wakeup_reg = devm_regulator_get(&pdev->dev, "vbus-wakeup");
if (PTR_ERR(vbus_wakeup_reg) == -EPROBE_DEFER)
return -EPROBE_DEFER;
else if (PTR_ERR(vbus_wakeup_reg) == -ENODEV)
/* no vbus regualator is needed */
vbus_wakeup_reg = NULL;
else if (IS_ERR(vbus_wakeup_reg)) {
dev_err(&pdev->dev, "Getting regulator error: %ld\n",
PTR_ERR(vbus_wakeup_reg));
return PTR_ERR(vbus_wakeup_reg);
}
return 0;
}
static int usbmisc_imx_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver usbmisc_imx_driver = {
.probe = usbmisc_imx_probe,
.remove = usbmisc_imx_remove,
.driver = {
.name = "usbmisc_imx",
.of_match_table = usbmisc_imx_dt_ids,
},
};
module_platform_driver(usbmisc_imx_driver);
MODULE_ALIAS("platform:usbmisc-imx");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("driver for imx usb non-core registers");
MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");