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/*
* Faraday USB 2.0 EHCI Controller
*
* (C) Copyright 2010 Faraday Technology
* Dante Su <dantesu@faraday-tech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <usb.h>
#include <usb/fusbh200.h>
#include <usb/fotg210.h>
#include "ehci.h"
#ifndef CONFIG_USB_EHCI_BASE_LIST
#define CONFIG_USB_EHCI_BASE_LIST { CONFIG_USB_EHCI_BASE }
#endif
union ehci_faraday_regs {
struct fusbh200_regs usb;
struct fotg210_regs otg;
};
static inline int ehci_is_fotg2xx(union ehci_faraday_regs *regs)
{
return !readl(®s->usb.easstr);
}
/*
* Create the appropriate control structures to manage
* a new EHCI host controller.
*/
int ehci_hcd_init(int index, struct ehci_hccr **ret_hccr,
struct ehci_hcor **ret_hcor)
{
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
union ehci_faraday_regs *regs;
uint32_t base_list[] = CONFIG_USB_EHCI_BASE_LIST;
if (index < 0 || index >= ARRAY_SIZE(base_list))
return -1;
regs = (void __iomem *)base_list[index];
hccr = (struct ehci_hccr *)®s->usb.hccr;
hcor = (struct ehci_hcor *)®s->usb.hcor;
if (ehci_is_fotg2xx(regs)) {
/* A-device bus reset */
/* ... Power off A-device */
setbits_le32(®s->otg.otgcsr, OTGCSR_A_BUSDROP);
/* ... Drop vbus and bus traffic */
clrbits_le32(®s->otg.otgcsr, OTGCSR_A_BUSREQ);
mdelay(1);
/* ... Power on A-device */
clrbits_le32(®s->otg.otgcsr, OTGCSR_A_BUSDROP);
/* ... Drive vbus and bus traffic */
setbits_le32(®s->otg.otgcsr, OTGCSR_A_BUSREQ);
mdelay(1);
/* Disable OTG & DEV interrupts, triggered at level-high */
writel(IMR_IRQLH | IMR_OTG | IMR_DEV, ®s->otg.imr);
/* Clear all interrupt status */
writel(ISR_HOST | ISR_OTG | ISR_DEV, ®s->otg.isr);
} else {
/* Interrupt=level-high */
setbits_le32(®s->usb.bmcsr, BMCSR_IRQLH);
/* VBUS on */
clrbits_le32(®s->usb.bmcsr, BMCSR_VBUS_OFF);
/* Disable all interrupts */
writel(0x00, ®s->usb.bmier);
writel(0x1f, ®s->usb.bmisr);
}
*ret_hccr = hccr;
*ret_hcor = hcor;
return 0;
}
/*
* Destroy the appropriate control structures corresponding
* the the EHCI host controller.
*/
int ehci_hcd_stop(int index)
{
return 0;
}
/*
* This ehci_set_usbmode() overrides the weak function
* in "ehci-hcd.c".
*/
void ehci_set_usbmode(int index)
{
/* nothing needs to be done */
}
/*
* This ehci_get_port_speed() overrides the weak function
* in "ehci-hcd.c".
*/
int ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg)
{
int spd, ret = PORTSC_PSPD_HS;
union ehci_faraday_regs *regs = (void __iomem *)((ulong)hcor - 0x10);
if (ehci_is_fotg2xx(regs))
spd = OTGCSR_SPD(readl(®s->otg.otgcsr));
else
spd = BMCSR_SPD(readl(®s->usb.bmcsr));
switch (spd) {
case 0: /* full speed */
ret = PORTSC_PSPD_FS;
break;
case 1: /* low speed */
ret = PORTSC_PSPD_LS;
break;
case 2: /* high speed */
ret = PORTSC_PSPD_HS;
break;
default:
printf("ehci-faraday: invalid device speed\n");
break;
}
return ret;
}
/*
* This ehci_get_portsc_register() overrides the weak function
* in "ehci-hcd.c".
*/
uint32_t *ehci_get_portsc_register(struct ehci_hcor *hcor, int port)
{
/* Faraday EHCI has one and only one portsc register */
if (port) {
/* Printing the message would cause a scan failure! */
debug("The request port(%d) is not configured\n", port);
return NULL;
}
/* Faraday EHCI PORTSC register offset is 0x20 from hcor */
return (uint32_t *)((uint8_t *)hcor + 0x20);
}
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