diff options
Diffstat (limited to 'drivers/usb/host/ehci-faraday.c')
| -rw-r--r-- | drivers/usb/host/ehci-faraday.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-faraday.c b/drivers/usb/host/ehci-faraday.c new file mode 100644 index 0000000..86add36 --- /dev/null +++ b/drivers/usb/host/ehci-faraday.c @@ -0,0 +1,148 @@ +/* + * Faraday USB 2.0 EHCI Controller + * + * (C) Copyright 2010 Faraday Technology + * Dante Su <dantesu@faraday-tech.com> + * + * This file is released under the terms of GPL v2 and any later version. + * See the file COPYING in the root directory of the source tree for details. + */ + +#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); +} |