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/*
* Copyright (c) 2015 Sanchayan Maity <sanchayan.maity@toradex.com>
* Copyright (C) 2015 Toradex AG
*
* Based on ehci-mx6 driver
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <usb.h>
#include <errno.h>
#include <linux/compiler.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/crm_regs.h>
#include <asm/imx-common/iomux-v3.h>
#include <asm/imx-common/regs-usbphy.h>
#include <usb/ehci-ci.h>
#include "ehci.h"
#define USB_NC_REG_OFFSET 0x00000800
#define ANADIG_PLL_CTRL_EN_USB_CLKS (1 << 6)
#define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */
#define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */
/* USBCMD */
#define UCMD_RUN_STOP (1 << 0) /* controller run/stop */
#define UCMD_RESET (1 << 1) /* controller reset */
static const unsigned phy_bases[] = {
USB_PHY0_BASE_ADDR,
USB_PHY1_BASE_ADDR,
};
static const unsigned nc_reg_bases[] = {
USBC0_BASE_ADDR,
USBC1_BASE_ADDR,
};
static void usb_internal_phy_clock_gate(int index)
{
void __iomem *phy_reg;
phy_reg = (void __iomem *)phy_bases[index];
clrbits_le32(phy_reg + USBPHY_CTRL, USBPHY_CTRL_CLKGATE);
}
static void usb_power_config(int index)
{
struct anadig_reg __iomem *anadig =
(struct anadig_reg __iomem *)ANADIG_BASE_ADDR;
void __iomem *pll_ctrl;
switch (index) {
case 0:
pll_ctrl = &anadig->pll3_ctrl;
clrbits_le32(pll_ctrl, ANADIG_PLL3_CTRL_BYPASS);
setbits_le32(pll_ctrl, ANADIG_PLL3_CTRL_ENABLE
| ANADIG_PLL3_CTRL_POWERDOWN
| ANADIG_PLL_CTRL_EN_USB_CLKS);
break;
case 1:
pll_ctrl = &anadig->pll7_ctrl;
clrbits_le32(pll_ctrl, ANADIG_PLL7_CTRL_BYPASS);
setbits_le32(pll_ctrl, ANADIG_PLL7_CTRL_ENABLE
| ANADIG_PLL7_CTRL_POWERDOWN
| ANADIG_PLL_CTRL_EN_USB_CLKS);
break;
default:
return;
}
}
static void usb_phy_enable(int index, struct usb_ehci *ehci)
{
void __iomem *phy_reg;
void __iomem *phy_ctrl;
void __iomem *usb_cmd;
phy_reg = (void __iomem *)phy_bases[index];
phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL);
usb_cmd = (void __iomem *)&ehci->usbcmd;
/* Stop then Reset */
clrbits_le32(usb_cmd, UCMD_RUN_STOP);
while (readl(usb_cmd) & UCMD_RUN_STOP)
;
setbits_le32(usb_cmd, UCMD_RESET);
while (readl(usb_cmd) & UCMD_RESET)
;
/* Reset USBPHY module */
setbits_le32(phy_ctrl, USBPHY_CTRL_SFTRST);
udelay(10);
/* Remove CLKGATE and SFTRST */
clrbits_le32(phy_ctrl, USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST);
udelay(10);
/* Power up the PHY */
writel(0, phy_reg + USBPHY_PWD);
/* Enable FS/LS device */
setbits_le32(phy_ctrl, USBPHY_CTRL_ENUTMILEVEL2 |
USBPHY_CTRL_ENUTMILEVEL3);
}
static void usb_oc_config(int index)
{
void __iomem *ctrl;
ctrl = (void __iomem *)(nc_reg_bases[index] + USB_NC_REG_OFFSET);
setbits_le32(ctrl, UCTRL_OVER_CUR_POL);
setbits_le32(ctrl, UCTRL_OVER_CUR_DIS);
}
int __weak board_usb_phy_mode(int port)
{
return 0;
}
int __weak board_ehci_hcd_init(int port)
{
return 0;
}
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
struct usb_ehci *ehci;
enum usb_init_type type;
if (index >= ARRAY_SIZE(nc_reg_bases))
return -EINVAL;
ehci = (struct usb_ehci *)nc_reg_bases[index];
/* Do board specific initialisation */
board_ehci_hcd_init(index);
usb_power_config(index);
usb_oc_config(index);
usb_internal_phy_clock_gate(index);
usb_phy_enable(index, ehci);
*hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
*hcor = (struct ehci_hcor *)((uint32_t)*hccr +
HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
type = board_usb_phy_mode(index);
if (type != init)
return -ENODEV;
if (init == USB_INIT_DEVICE) {
setbits_le32(&ehci->usbmode, CM_DEVICE);
writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
setbits_le32(&ehci->portsc, USB_EN);
} else if (init == USB_INIT_HOST) {
setbits_le32(&ehci->usbmode, CM_HOST);
writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
setbits_le32(&ehci->portsc, USB_EN);
}
return 0;
}
int ehci_hcd_stop(int index)
{
return 0;
}
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