u-boot/drivers/usb/host/ehci-exynos.c
Lukasz Majewski 70cc443d58 usb: host: ehci: samsung: Move hcor initialization after usb phy setup
With the old order of initialization the hcor pointer has been setup to
the same address as Exynos EHCI base address (0x12110000 instead of
0x12110010).
Such behaviour was caused by reading value of 0 instead of 0x10 from EHCI
HCCPBASE register without doing proper clock initialization before.

To fix this problem hcor initialization has been moved after USB PHY setup.
Now ehci_readl(&ctx->hcd->cr_capbase) returns correct value.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
2015-12-17 21:54:41 +01:00

263 lines
6.3 KiB
C

/*
* SAMSUNG EXYNOS USB HOST EHCI Controller
*
* Copyright (C) 2012 Samsung Electronics Co.Ltd
* Vivek Gautam <gautam.vivek@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <malloc.h>
#include <usb.h>
#include <asm/arch/cpu.h>
#include <asm/arch/ehci.h>
#include <asm/arch/system.h>
#include <asm/arch/power.h>
#include <asm/gpio.h>
#include <asm-generic/errno.h>
#include <linux/compat.h>
#include "ehci.h"
/* Declare global data pointer */
DECLARE_GLOBAL_DATA_PTR;
struct exynos_ehci_platdata {
struct usb_platdata usb_plat;
fdt_addr_t hcd_base;
fdt_addr_t phy_base;
struct gpio_desc vbus_gpio;
};
/**
* Contains pointers to register base addresses
* for the usb controller.
*/
struct exynos_ehci {
struct ehci_ctrl ctrl;
struct exynos_usb_phy *usb;
struct ehci_hccr *hcd;
};
static int ehci_usb_ofdata_to_platdata(struct udevice *dev)
{
struct exynos_ehci_platdata *plat = dev_get_platdata(dev);
const void *blob = gd->fdt_blob;
unsigned int node;
int depth;
/*
* Get the base address for XHCI controller from the device node
*/
plat->hcd_base = dev_get_addr(dev);
if (plat->hcd_base == FDT_ADDR_T_NONE) {
debug("Can't get the XHCI register base address\n");
return -ENXIO;
}
depth = 0;
node = fdtdec_next_compatible_subnode(blob, dev->of_offset,
COMPAT_SAMSUNG_EXYNOS_USB_PHY, &depth);
if (node <= 0) {
debug("XHCI: Can't get device node for usb3-phy controller\n");
return -ENODEV;
}
/*
* Get the base address for usbphy from the device node
*/
plat->phy_base = fdtdec_get_addr(blob, node, "reg");
if (plat->phy_base == FDT_ADDR_T_NONE) {
debug("Can't get the usbphy register address\n");
return -ENXIO;
}
/* Vbus gpio */
gpio_request_by_name(dev, "samsung,vbus-gpio", 0,
&plat->vbus_gpio, GPIOD_IS_OUT);
return 0;
}
static void exynos5_setup_usb_phy(struct exynos_usb_phy *usb)
{
u32 hsic_ctrl;
clrbits_le32(&usb->usbphyctrl0,
HOST_CTRL0_FSEL_MASK |
HOST_CTRL0_COMMONON_N |
/* HOST Phy setting */
HOST_CTRL0_PHYSWRST |
HOST_CTRL0_PHYSWRSTALL |
HOST_CTRL0_SIDDQ |
HOST_CTRL0_FORCESUSPEND |
HOST_CTRL0_FORCESLEEP);
setbits_le32(&usb->usbphyctrl0,
/* Setting up the ref freq */
(CLK_24MHZ << 16) |
/* HOST Phy setting */
HOST_CTRL0_LINKSWRST |
HOST_CTRL0_UTMISWRST);
udelay(10);
clrbits_le32(&usb->usbphyctrl0,
HOST_CTRL0_LINKSWRST |
HOST_CTRL0_UTMISWRST);
/* HSIC Phy Setting */
hsic_ctrl = (HSIC_CTRL_FORCESUSPEND |
HSIC_CTRL_FORCESLEEP |
HSIC_CTRL_SIDDQ);
clrbits_le32(&usb->hsicphyctrl1, hsic_ctrl);
clrbits_le32(&usb->hsicphyctrl2, hsic_ctrl);
hsic_ctrl = (((HSIC_CTRL_REFCLKDIV_12 & HSIC_CTRL_REFCLKDIV_MASK)
<< HSIC_CTRL_REFCLKDIV_SHIFT)
| ((HSIC_CTRL_REFCLKSEL & HSIC_CTRL_REFCLKSEL_MASK)
<< HSIC_CTRL_REFCLKSEL_SHIFT)
| HSIC_CTRL_UTMISWRST);
setbits_le32(&usb->hsicphyctrl1, hsic_ctrl);
setbits_le32(&usb->hsicphyctrl2, hsic_ctrl);
udelay(10);
clrbits_le32(&usb->hsicphyctrl1, HSIC_CTRL_PHYSWRST |
HSIC_CTRL_UTMISWRST);
clrbits_le32(&usb->hsicphyctrl2, HSIC_CTRL_PHYSWRST |
HSIC_CTRL_UTMISWRST);
udelay(20);
/* EHCI Ctrl setting */
setbits_le32(&usb->ehcictrl,
EHCICTRL_ENAINCRXALIGN |
EHCICTRL_ENAINCR4 |
EHCICTRL_ENAINCR8 |
EHCICTRL_ENAINCR16);
}
static void exynos4412_setup_usb_phy(struct exynos4412_usb_phy *usb)
{
writel(CLK_24MHZ, &usb->usbphyclk);
clrbits_le32(&usb->usbphyctrl, (PHYPWR_NORMAL_MASK_HSIC0 |
PHYPWR_NORMAL_MASK_HSIC1 | PHYPWR_NORMAL_MASK_PHY1 |
PHYPWR_NORMAL_MASK_PHY0));
setbits_le32(&usb->usbphyrstcon, (RSTCON_HOSTPHY_SWRST | RSTCON_SWRST));
udelay(10);
clrbits_le32(&usb->usbphyrstcon, (RSTCON_HOSTPHY_SWRST | RSTCON_SWRST));
}
static void setup_usb_phy(struct exynos_usb_phy *usb)
{
set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN);
set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_EN);
if (cpu_is_exynos5())
exynos5_setup_usb_phy(usb);
else if (cpu_is_exynos4())
if (proid_is_exynos4412())
exynos4412_setup_usb_phy((struct exynos4412_usb_phy *)
usb);
}
static void exynos5_reset_usb_phy(struct exynos_usb_phy *usb)
{
u32 hsic_ctrl;
/* HOST_PHY reset */
setbits_le32(&usb->usbphyctrl0,
HOST_CTRL0_PHYSWRST |
HOST_CTRL0_PHYSWRSTALL |
HOST_CTRL0_SIDDQ |
HOST_CTRL0_FORCESUSPEND |
HOST_CTRL0_FORCESLEEP);
/* HSIC Phy reset */
hsic_ctrl = (HSIC_CTRL_FORCESUSPEND |
HSIC_CTRL_FORCESLEEP |
HSIC_CTRL_SIDDQ |
HSIC_CTRL_PHYSWRST);
setbits_le32(&usb->hsicphyctrl1, hsic_ctrl);
setbits_le32(&usb->hsicphyctrl2, hsic_ctrl);
}
static void exynos4412_reset_usb_phy(struct exynos4412_usb_phy *usb)
{
setbits_le32(&usb->usbphyctrl, (PHYPWR_NORMAL_MASK_HSIC0 |
PHYPWR_NORMAL_MASK_HSIC1 | PHYPWR_NORMAL_MASK_PHY1 |
PHYPWR_NORMAL_MASK_PHY0));
}
/* Reset the EHCI host controller. */
static void reset_usb_phy(struct exynos_usb_phy *usb)
{
if (cpu_is_exynos5())
exynos5_reset_usb_phy(usb);
else if (cpu_is_exynos4())
if (proid_is_exynos4412())
exynos4412_reset_usb_phy((struct exynos4412_usb_phy *)
usb);
set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_DISABLE);
}
static int ehci_usb_probe(struct udevice *dev)
{
struct exynos_ehci_platdata *plat = dev_get_platdata(dev);
struct exynos_ehci *ctx = dev_get_priv(dev);
struct ehci_hcor *hcor;
ctx->hcd = (struct ehci_hccr *)plat->hcd_base;
ctx->usb = (struct exynos_usb_phy *)plat->phy_base;
/* setup the Vbus gpio here */
if (dm_gpio_is_valid(&plat->vbus_gpio))
dm_gpio_set_value(&plat->vbus_gpio, 1);
setup_usb_phy(ctx->usb);
hcor = (struct ehci_hcor *)((uint32_t)ctx->hcd +
HC_LENGTH(ehci_readl(&ctx->hcd->cr_capbase)));
return ehci_register(dev, ctx->hcd, hcor, NULL, 0, USB_INIT_HOST);
}
static int ehci_usb_remove(struct udevice *dev)
{
struct exynos_ehci *ctx = dev_get_priv(dev);
int ret;
ret = ehci_deregister(dev);
if (ret)
return ret;
reset_usb_phy(ctx->usb);
return 0;
}
static const struct udevice_id ehci_usb_ids[] = {
{ .compatible = "samsung,exynos-ehci" },
{ }
};
U_BOOT_DRIVER(usb_ehci) = {
.name = "ehci_exynos",
.id = UCLASS_USB,
.of_match = ehci_usb_ids,
.ofdata_to_platdata = ehci_usb_ofdata_to_platdata,
.probe = ehci_usb_probe,
.remove = ehci_usb_remove,
.ops = &ehci_usb_ops,
.priv_auto_alloc_size = sizeof(struct exynos_ehci),
.platdata_auto_alloc_size = sizeof(struct exynos_ehci_platdata),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};