mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-29 21:38:52 +09:00
![Troy Kisky](/assets/img/avatar_default.png)
This paramter will later be used to initialize OTG ports in host or device mode. Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
159 lines
4.0 KiB
C
159 lines
4.0 KiB
C
/*
|
|
* Freescale i.MX28 USB Host driver
|
|
*
|
|
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
|
|
* on behalf of DENX Software Engineering GmbH
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
#include <errno.h>
|
|
|
|
#include "ehci.h"
|
|
|
|
/* This DIGCTL register ungates clock to USB */
|
|
#define HW_DIGCTL_CTRL 0x8001c000
|
|
#define HW_DIGCTL_CTRL_USB0_CLKGATE (1 << 2)
|
|
#define HW_DIGCTL_CTRL_USB1_CLKGATE (1 << 16)
|
|
|
|
struct ehci_mxs_port {
|
|
uint32_t usb_regs;
|
|
struct mxs_usbphy_regs *phy_regs;
|
|
|
|
struct mxs_register_32 *pll;
|
|
uint32_t pll_en_bits;
|
|
uint32_t pll_dis_bits;
|
|
uint32_t gate_bits;
|
|
};
|
|
|
|
static const struct ehci_mxs_port mxs_port[] = {
|
|
#ifdef CONFIG_EHCI_MXS_PORT0
|
|
{
|
|
MXS_USBCTRL0_BASE,
|
|
(struct mxs_usbphy_regs *)MXS_USBPHY0_BASE,
|
|
(struct mxs_register_32 *)(MXS_CLKCTRL_BASE +
|
|
offsetof(struct mxs_clkctrl_regs,
|
|
hw_clkctrl_pll0ctrl0_reg)),
|
|
CLKCTRL_PLL0CTRL0_EN_USB_CLKS | CLKCTRL_PLL0CTRL0_POWER,
|
|
CLKCTRL_PLL0CTRL0_EN_USB_CLKS,
|
|
HW_DIGCTL_CTRL_USB0_CLKGATE,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_EHCI_MXS_PORT1
|
|
{
|
|
MXS_USBCTRL1_BASE,
|
|
(struct mxs_usbphy_regs *)MXS_USBPHY1_BASE,
|
|
(struct mxs_register_32 *)(MXS_CLKCTRL_BASE +
|
|
offsetof(struct mxs_clkctrl_regs,
|
|
hw_clkctrl_pll1ctrl0_reg)),
|
|
CLKCTRL_PLL1CTRL0_EN_USB_CLKS | CLKCTRL_PLL1CTRL0_POWER,
|
|
CLKCTRL_PLL1CTRL0_EN_USB_CLKS,
|
|
HW_DIGCTL_CTRL_USB1_CLKGATE,
|
|
},
|
|
#endif
|
|
};
|
|
|
|
static int ehci_mxs_toggle_clock(const struct ehci_mxs_port *port, int enable)
|
|
{
|
|
struct mxs_register_32 *digctl_ctrl =
|
|
(struct mxs_register_32 *)HW_DIGCTL_CTRL;
|
|
int pll_offset, dig_offset;
|
|
|
|
if (enable) {
|
|
pll_offset = offsetof(struct mxs_register_32, reg_set);
|
|
dig_offset = offsetof(struct mxs_register_32, reg_clr);
|
|
writel(port->gate_bits, (u32)&digctl_ctrl->reg + dig_offset);
|
|
writel(port->pll_en_bits, (u32)port->pll + pll_offset);
|
|
} else {
|
|
pll_offset = offsetof(struct mxs_register_32, reg_clr);
|
|
dig_offset = offsetof(struct mxs_register_32, reg_set);
|
|
writel(port->pll_dis_bits, (u32)port->pll + pll_offset);
|
|
writel(port->gate_bits, (u32)&digctl_ctrl->reg + dig_offset);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ehci_hcd_init(int index, enum usb_init_type init,
|
|
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
|
|
{
|
|
|
|
int ret;
|
|
uint32_t usb_base, cap_base;
|
|
const struct ehci_mxs_port *port;
|
|
|
|
if ((index < 0) || (index >= ARRAY_SIZE(mxs_port))) {
|
|
printf("Invalid port index (index = %d)!\n", index);
|
|
return -EINVAL;
|
|
}
|
|
|
|
port = &mxs_port[index];
|
|
|
|
/* Reset the PHY block */
|
|
writel(USBPHY_CTRL_SFTRST, &port->phy_regs->hw_usbphy_ctrl_set);
|
|
udelay(10);
|
|
writel(USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE,
|
|
&port->phy_regs->hw_usbphy_ctrl_clr);
|
|
|
|
/* Enable USB clock */
|
|
ret = ehci_mxs_toggle_clock(port, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Start USB PHY */
|
|
writel(0, &port->phy_regs->hw_usbphy_pwd);
|
|
|
|
/* Enable UTMI+ Level 2 and Level 3 compatibility */
|
|
writel(USBPHY_CTRL_ENUTMILEVEL3 | USBPHY_CTRL_ENUTMILEVEL2 | 1,
|
|
&port->phy_regs->hw_usbphy_ctrl_set);
|
|
|
|
usb_base = port->usb_regs + 0x100;
|
|
*hccr = (struct ehci_hccr *)usb_base;
|
|
|
|
cap_base = ehci_readl(&(*hccr)->cr_capbase);
|
|
*hcor = (struct ehci_hcor *)(usb_base + HC_LENGTH(cap_base));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ehci_hcd_stop(int index)
|
|
{
|
|
int ret;
|
|
uint32_t usb_base, cap_base, tmp;
|
|
struct ehci_hccr *hccr;
|
|
struct ehci_hcor *hcor;
|
|
const struct ehci_mxs_port *port;
|
|
|
|
if ((index < 0) || (index >= ARRAY_SIZE(mxs_port))) {
|
|
printf("Invalid port index (index = %d)!\n", index);
|
|
return -EINVAL;
|
|
}
|
|
|
|
port = &mxs_port[index];
|
|
|
|
/* Stop the USB port */
|
|
usb_base = port->usb_regs + 0x100;
|
|
hccr = (struct ehci_hccr *)usb_base;
|
|
cap_base = ehci_readl(&hccr->cr_capbase);
|
|
hcor = (struct ehci_hcor *)(usb_base + HC_LENGTH(cap_base));
|
|
|
|
tmp = ehci_readl(&hcor->or_usbcmd);
|
|
tmp &= ~CMD_RUN;
|
|
ehci_writel(tmp, &hcor->or_usbcmd);
|
|
|
|
/* Disable the PHY */
|
|
tmp = USBPHY_PWD_RXPWDRX | USBPHY_PWD_RXPWDDIFF |
|
|
USBPHY_PWD_RXPWD1PT1 | USBPHY_PWD_RXPWDENV |
|
|
USBPHY_PWD_TXPWDV2I | USBPHY_PWD_TXPWDIBIAS |
|
|
USBPHY_PWD_TXPWDFS;
|
|
writel(tmp, &port->phy_regs->hw_usbphy_pwd);
|
|
|
|
/* Disable USB clock */
|
|
ret = ehci_mxs_toggle_clock(port, 0);
|
|
|
|
return ret;
|
|
}
|