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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2013 Sascha Hauer <s.hauer@pengutronix.de>
*/
#include <common.h>
#include <init.h>
#include <io.h>
#include <of.h>
#include <errno.h>
#include <driver.h>
#include <malloc.h>
#include <usb/phy.h>
#include <linux/phy/phy.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <stmp-device.h>
#include <mfd/syscon.h>
#define HW_USBPHY_PWD 0x00
#define HW_USBPHY_TX 0x10
#define HW_USBPHY_CTRL 0x30
#define HW_USBPHY_CTRL_SET 0x34
#define HW_USBPHY_CTRL_CLR 0x38
#define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15)
#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14)
#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1)
#define ANADIG_USB1_CHRG_DETECT_SET 0x1b4
#define ANADIG_USB1_CHRG_DETECT_EN_B BIT(20)
#define ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B BIT(19)
#define ANADIG_USB1_VBUS_DETECT_STAT 0x1c0
#define ANADIG_USB1_VBUS_DETECT_STAT_VBUS_VALID BIT(3)
#define ANADIG_USB2_CHRG_DETECT_SET 0x214
#define ANADIG_USB2_VBUS_DETECT_STAT 0x220
struct imx_usbphy {
struct usb_phy usb_phy;
struct phy *phy;
void __iomem *base;
void __iomem *anatop;
struct clk *clk;
struct phy_provider *provider;
int port_id;
unsigned int vbus_valid;
};
static int imx_usbphy_phy_init(struct phy *phy)
{
struct imx_usbphy *imxphy = phy_get_drvdata(phy);
int ret;
clk_enable(imxphy->clk);
mdelay(1);
ret = stmp_reset_block(imxphy->base + HW_USBPHY_CTRL, false);
if (ret)
return ret;
/* Power up the PHY */
writel(0, imxphy->base + HW_USBPHY_PWD);
/* set utmilvl2/3 */
writel(BM_USBPHY_CTRL_ENUTMILEVEL3 | BM_USBPHY_CTRL_ENUTMILEVEL2,
imxphy->base + HW_USBPHY_CTRL_SET);
if (imxphy->anatop) {
unsigned int reg = imxphy->port_id ?
ANADIG_USB1_CHRG_DETECT_SET :
ANADIG_USB2_CHRG_DETECT_SET;
/*
* The external charger detector needs to be disabled,
* or the signal at DP will be poor
*/
writel(ANADIG_USB1_CHRG_DETECT_EN_B |
ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B,
imxphy->anatop + reg);
}
return 0;
}
static int imx_usbphy_notify_connect(struct usb_phy *phy,
enum usb_device_speed speed)
{
struct imx_usbphy *imxphy = container_of(phy, struct imx_usbphy,
usb_phy);
if (speed == USB_SPEED_HIGH) {
writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
imxphy->base + HW_USBPHY_CTRL_SET);
}
return 0;
}
static int imx_usbphy_notify_disconnect(struct usb_phy *phy,
enum usb_device_speed speed)
{
struct imx_usbphy *imxphy = container_of(phy, struct imx_usbphy,
usb_phy);
writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
imxphy->base + HW_USBPHY_CTRL_CLR);
return 0;
}
static struct phy *imx_usbphy_xlate(struct device_d *dev,
struct of_phandle_args *args)
{
struct imx_usbphy *imxphy = dev->priv;
return imxphy->phy;
}
static struct usb_phy *imx_usbphy_to_usbphy(struct phy *phy)
{
struct imx_usbphy *imxphy = phy_get_drvdata(phy);
return &imxphy->usb_phy;
}
static const struct phy_ops imx_phy_ops = {
.init = imx_usbphy_phy_init,
.to_usbphy = imx_usbphy_to_usbphy,
};
static int imx_usbphy_get_vbus_state(struct param_d *p, void *priv)
{
struct imx_usbphy *imxphy = priv;
unsigned int reg, val;
reg = imxphy->port_id ?
ANADIG_USB1_VBUS_DETECT_STAT :
ANADIG_USB2_VBUS_DETECT_STAT;
val = readl(imxphy->anatop + reg);
imxphy->vbus_valid = !!(val & ANADIG_USB1_VBUS_DETECT_STAT_VBUS_VALID);
return 0;
}
static int imx_usbphy_probe(struct device_d *dev)
{
struct resource *iores;
struct device_node *np = dev->of_node;
int ret;
struct imx_usbphy *imxphy;
imxphy = xzalloc(sizeof(*imxphy));
ret = of_alias_get_id(np, "usbphy");
if (ret < 0) {
dev_dbg(dev, "failed to get alias id, errno %d\n", ret);
goto err_free;
}
imxphy->port_id = ret;
if (of_get_property(np, "fsl,anatop", NULL)) {
imxphy->anatop =
syscon_base_lookup_by_phandle(np, "fsl,anatop");
ret = PTR_ERR_OR_ZERO(imxphy->anatop);
if (ret)
goto err_free;
/*
* This is useful in case of usb-otg = device. In host case
* it isn't that useful since we are the supplier of the vbus
* signal.
*/
dev_add_param_bool(dev, "vbus_valid", param_set_readonly,
imx_usbphy_get_vbus_state,
&imxphy->vbus_valid, imxphy);
}
iores = dev_request_mem_resource(dev, 0);
if (IS_ERR(iores)) {
ret = PTR_ERR(iores);
goto err_free;
}
imxphy->base = IOMEM(iores->start);
imxphy->clk = clk_get(dev, NULL);
if (IS_ERR(imxphy->clk)) {
dev_err(dev, "could not get clk: %pe\n", imxphy->clk);
ret = PTR_ERR(imxphy->clk);
goto err_clk;
}
dev->priv = imxphy;
imxphy->usb_phy.dev = dev;
imxphy->usb_phy.notify_connect = imx_usbphy_notify_connect;
imxphy->usb_phy.notify_disconnect = imx_usbphy_notify_disconnect;
imxphy->phy = phy_create(dev, NULL, &imx_phy_ops);
if (IS_ERR(imxphy->phy)) {
ret = PTR_ERR(imxphy->phy);
goto err_clk;
}
phy_set_drvdata(imxphy->phy, imxphy);
imxphy->provider = of_phy_provider_register(dev, imx_usbphy_xlate);
if (IS_ERR(imxphy->provider)) {
ret = PTR_ERR(imxphy->provider);
goto err_clk;
}
dev_dbg(dev, "phy enabled\n");
return 0;
err_clk:
err_free:
free(imxphy);
return ret;
};
static __maybe_unused struct of_device_id imx_usbphy_dt_ids[] = {
{
.compatible = "fsl,imx23-usbphy",
}, {
.compatible = "fsl,vf610-usbphy",
}, {
/* sentinel */
},
};
static struct driver_d imx_usbphy_driver = {
.name = "imx-usb-phy",
.probe = imx_usbphy_probe,
.of_compatible = DRV_OF_COMPAT(imx_usbphy_dt_ids),
};
fs_platform_driver(imx_usbphy_driver);
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