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/*
* drivers/usb/host/ehci-rcar_gen3.
* This file is EHCI HCD (Host Controller Driver) for USB.
*
* Copyright (C) 2015-2017 Renesas Electronics Corporation
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <wait_bit.h>
#include <asm/io.h>
#include <usb/ehci-ci.h>
#include "ehci.h"
#define RCAR_GEN3_USB_BASE(n) (0xEE080000 + ((n) * 0x20000))
#define EHCI_USBCMD 0x120
#define CORE_SPD_RSM_TIMSET 0x30c
#define CORE_OC_TIMSET 0x310
/* Register offset */
#define AHB_OFFSET 0x200
#define BASE_HSUSB 0xE6590000
#define REG_LPSTS (BASE_HSUSB + 0x0102) /* 16bit */
#define SUSPM 0x4000
#define SUSPM_NORMAL BIT(14)
#define REG_UGCTRL2 (BASE_HSUSB + 0x0184) /* 32bit */
#define USB0SEL 0x00000030
#define USB0SEL_EHCI 0x00000010
#define SMSTPCR7 0xE615014C
#define SMSTPCR700 BIT(0) /* EHCI3 */
#define SMSTPCR701 BIT(1) /* EHCI2 */
#define SMSTPCR702 BIT(2) /* EHCI1 */
#define SMSTPCR703 BIT(3) /* EHCI0 */
#define SMSTPCR704 BIT(4) /* HSUSB */
#define AHB_PLL_RST BIT(1)
#define USBH_INTBEN BIT(2)
#define USBH_INTAEN BIT(1)
#define AHB_INT_ENABLE 0x200
#define AHB_USBCTR 0x20c
int ehci_hcd_stop(int index)
{
#if defined(CONFIG_R8A7795)
const u32 mask = SMSTPCR703 | SMSTPCR702 | SMSTPCR701 | SMSTPCR700;
#else
const u32 mask = SMSTPCR703 | SMSTPCR702;
#endif
const u32 base = RCAR_GEN3_USB_BASE(index);
int ret;
/* Reset EHCI */
setbits_le32((uintptr_t)(base + EHCI_USBCMD), CMD_RESET);
ret = wait_for_bit("ehci-rcar", (void *)(uintptr_t)base + EHCI_USBCMD,
CMD_RESET, false, 10, true);
if (ret) {
printf("ehci-rcar: reset failed (index=%i, ret=%i).\n",
index, ret);
}
setbits_le32(SMSTPCR7, BIT(3 - index));
if ((readl(SMSTPCR7) & mask) == mask)
setbits_le32(SMSTPCR7, SMSTPCR704);
return 0;
}
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
const void __iomem *base =
(void __iomem *)(uintptr_t)RCAR_GEN3_USB_BASE(index);
struct usb_ehci *ehci = (struct usb_ehci *)(uintptr_t)base;
clrbits_le32(SMSTPCR7, BIT(3 - index));
clrbits_le32(SMSTPCR7, SMSTPCR704);
*hccr = (struct ehci_hccr *)((uintptr_t)&ehci->caplength);
*hcor = (struct ehci_hcor *)((uintptr_t)*hccr +
HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
/* Enable interrupt */
setbits_le32(base + AHB_INT_ENABLE, USBH_INTBEN | USBH_INTAEN);
writel(0x014e029b, base + CORE_SPD_RSM_TIMSET);
writel(0x000209ab, base + CORE_OC_TIMSET);
/* Choice USB0SEL */
clrsetbits_le32(REG_UGCTRL2, USB0SEL, USB0SEL_EHCI);
/* Clock & Reset */
clrbits_le32(base + AHB_USBCTR, AHB_PLL_RST);
/* low power status */
clrsetbits_le16(REG_LPSTS, SUSPM, SUSPM_NORMAL);
return 0;
}
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