mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
94ae98433a
this will make sure that we have sensible names for all phy drivers. Current situation was already quite bad with too generic names being used. Signed-off-by: Felipe Balbi <balbi@ti.com>
221 lines
5.0 KiB
C
221 lines
5.0 KiB
C
/*
|
|
* Renesas R-Car USB phy driver
|
|
*
|
|
* Copyright (C) 2012 Renesas Solutions Corp.
|
|
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/io.h>
|
|
#include <linux/usb/otg.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/module.h>
|
|
|
|
/* USBH common register */
|
|
#define USBPCTRL0 0x0800
|
|
#define USBPCTRL1 0x0804
|
|
#define USBST 0x0808
|
|
#define USBEH0 0x080C
|
|
#define USBOH0 0x081C
|
|
#define USBCTL0 0x0858
|
|
#define EIIBC1 0x0094
|
|
#define EIIBC2 0x009C
|
|
|
|
/* USBPCTRL1 */
|
|
#define PHY_RST (1 << 2)
|
|
#define PLL_ENB (1 << 1)
|
|
#define PHY_ENB (1 << 0)
|
|
|
|
/* USBST */
|
|
#define ST_ACT (1 << 31)
|
|
#define ST_PLL (1 << 30)
|
|
|
|
struct rcar_usb_phy_priv {
|
|
struct usb_phy phy;
|
|
spinlock_t lock;
|
|
|
|
void __iomem *reg0;
|
|
void __iomem *reg1;
|
|
int counter;
|
|
};
|
|
|
|
#define usb_phy_to_priv(p) container_of(p, struct rcar_usb_phy_priv, phy)
|
|
|
|
|
|
/*
|
|
* USB initial/install operation.
|
|
*
|
|
* This function setup USB phy.
|
|
* The used value and setting order came from
|
|
* [USB :: Initial setting] on datasheet.
|
|
*/
|
|
static int rcar_usb_phy_init(struct usb_phy *phy)
|
|
{
|
|
struct rcar_usb_phy_priv *priv = usb_phy_to_priv(phy);
|
|
struct device *dev = phy->dev;
|
|
void __iomem *reg0 = priv->reg0;
|
|
void __iomem *reg1 = priv->reg1;
|
|
int i;
|
|
u32 val;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
if (priv->counter++ == 0) {
|
|
|
|
/*
|
|
* USB phy start-up
|
|
*/
|
|
|
|
/* (1) USB-PHY standby release */
|
|
iowrite32(PHY_ENB, (reg0 + USBPCTRL1));
|
|
|
|
/* (2) start USB-PHY internal PLL */
|
|
iowrite32(PHY_ENB | PLL_ENB, (reg0 + USBPCTRL1));
|
|
|
|
/* (3) USB module status check */
|
|
for (i = 0; i < 1024; i++) {
|
|
udelay(10);
|
|
val = ioread32(reg0 + USBST);
|
|
if (val == (ST_ACT | ST_PLL))
|
|
break;
|
|
}
|
|
|
|
if (val != (ST_ACT | ST_PLL)) {
|
|
dev_err(dev, "USB phy not ready\n");
|
|
goto phy_init_end;
|
|
}
|
|
|
|
/* (4) USB-PHY reset clear */
|
|
iowrite32(PHY_ENB | PLL_ENB | PHY_RST, (reg0 + USBPCTRL1));
|
|
|
|
/* set platform specific port settings */
|
|
iowrite32(0x00000000, (reg0 + USBPCTRL0));
|
|
|
|
/*
|
|
* EHCI IP internal buffer setting
|
|
* EHCI IP internal buffer enable
|
|
*
|
|
* These are recommended value of a datasheet
|
|
* see [USB :: EHCI internal buffer setting]
|
|
*/
|
|
iowrite32(0x00ff0040, (reg0 + EIIBC1));
|
|
iowrite32(0x00ff0040, (reg1 + EIIBC1));
|
|
|
|
iowrite32(0x00000001, (reg0 + EIIBC2));
|
|
iowrite32(0x00000001, (reg1 + EIIBC2));
|
|
|
|
/*
|
|
* Bus alignment settings
|
|
*/
|
|
|
|
/* (1) EHCI bus alignment (little endian) */
|
|
iowrite32(0x00000000, (reg0 + USBEH0));
|
|
|
|
/* (1) OHCI bus alignment (little endian) */
|
|
iowrite32(0x00000000, (reg0 + USBOH0));
|
|
}
|
|
|
|
phy_init_end:
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rcar_usb_phy_shutdown(struct usb_phy *phy)
|
|
{
|
|
struct rcar_usb_phy_priv *priv = usb_phy_to_priv(phy);
|
|
void __iomem *reg0 = priv->reg0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
if (priv->counter-- == 1) { /* last user */
|
|
iowrite32(0x00000000, (reg0 + USBPCTRL0));
|
|
iowrite32(0x00000000, (reg0 + USBPCTRL1));
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
static int rcar_usb_phy_probe(struct platform_device *pdev)
|
|
{
|
|
struct rcar_usb_phy_priv *priv;
|
|
struct resource *res0, *res1;
|
|
struct device *dev = &pdev->dev;
|
|
void __iomem *reg0, *reg1;
|
|
int ret;
|
|
|
|
res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (!res0 || !res1) {
|
|
dev_err(dev, "Not enough platform resources\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* CAUTION
|
|
*
|
|
* Because this phy address is also mapped under OHCI/EHCI address area,
|
|
* this driver can't use devm_request_and_ioremap(dev, res) here
|
|
*/
|
|
reg0 = devm_ioremap_nocache(dev, res0->start, resource_size(res0));
|
|
reg1 = devm_ioremap_nocache(dev, res1->start, resource_size(res1));
|
|
if (!reg0 || !reg1) {
|
|
dev_err(dev, "ioremap error\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv) {
|
|
dev_err(dev, "priv data allocation error\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv->reg0 = reg0;
|
|
priv->reg1 = reg1;
|
|
priv->counter = 0;
|
|
priv->phy.dev = dev;
|
|
priv->phy.label = dev_name(dev);
|
|
priv->phy.init = rcar_usb_phy_init;
|
|
priv->phy.shutdown = rcar_usb_phy_shutdown;
|
|
spin_lock_init(&priv->lock);
|
|
|
|
ret = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2);
|
|
if (ret < 0) {
|
|
dev_err(dev, "usb phy addition error\n");
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rcar_usb_phy_remove(struct platform_device *pdev)
|
|
{
|
|
struct rcar_usb_phy_priv *priv = platform_get_drvdata(pdev);
|
|
|
|
usb_remove_phy(&priv->phy);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver rcar_usb_phy_driver = {
|
|
.driver = {
|
|
.name = "rcar_usb_phy",
|
|
},
|
|
.probe = rcar_usb_phy_probe,
|
|
.remove = rcar_usb_phy_remove,
|
|
};
|
|
|
|
module_platform_driver(rcar_usb_phy_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("Renesas R-Car USB phy");
|
|
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
|