- 根目录:
- drivers
- usb
- chipidea
- usbmisc_imx.c
/*
* Copyright 2012 Freescale Semiconductor, Inc.
*
* 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 "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_UH2_CTRL_OFFSET 0x14
#define MX53_USB_UH3_CTRL_OFFSET 0x18
#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_PHYCTRL1_PLLDIV_MASK 0x3
#define MX53_USB_PLL_DIV_24_MHZ 0x01
#define MX6_BM_OVER_CUR_DIS BIT(7)
#define MX6_BM_WAKEUP_ENABLE BIT(10)
#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_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)
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);
};
struct imx_usbmisc {
void __iomem *base;
spinlock_t lock;
const struct usbmisc_ops *ops;
};
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);
if (data->disable_oc) {
spin_lock_irqsave(&usbmisc->lock, flags);
switch (data->index) {
case 0:
reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
break;
case 1:
reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
break;
case 2:
reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
break;
case 3:
reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
break;
}
if (reg && val)
writel(val, reg);
spin_unlock_irqrestore(&usbmisc->lock, flags);
}
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;
u32 val;
u32 wakeup_setting = (MX6_BM_WAKEUP_ENABLE |
MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP);
int ret = 0;
if (data->index > 3)
return -EINVAL;
spin_lock_irqsave(&usbmisc->lock, flags);
val = readl(usbmisc->base + data->index * 4);
if (enabled) {
val |= wakeup_setting;
writel(val, usbmisc->base + data->index * 4);
} else {
if (val & MX6_BM_WAKEUP_INTR)
pr_debug("wakeup int at ci_hdrc.%d\n", data->index);
val &= ~wakeup_setting;
writel(val, usbmisc->base + data->index * 4);
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
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;
if (data->index > 3)
return -EINVAL;
if (data->disable_oc) {
spin_lock_irqsave(&usbmisc->lock, flags);
reg = readl(usbmisc->base + data->index * 4);
writel(reg | MX6_BM_OVER_CUR_DIS,
usbmisc->base + data->index * 4);
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);
if (data->index == 0 || data->index == 1) {
reg = usbmisc->base + MX6_USB_OTG1_PHY_CTRL + data->index * 4;
spin_lock_irqsave(&usbmisc->lock, flags);
/* 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);
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 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 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,
};
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,
};
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);
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 = &imx53_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,
},
{ /* 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;
struct of_device_id *tmp_dev;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
spin_lock_init(&data->lock);
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);
tmp_dev = (struct of_device_id *)
of_match_device(usbmisc_imx_dt_ids, &pdev->dev);
data->ops = (const struct usbmisc_ops *)tmp_dev->data;
platform_set_drvdata(pdev, data);
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>");