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USB EHCI: reset root hub

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Some of multi-function USB controllers (e.g. ISP1562) allow root hub
resetting only via EHCI registers. So, this patch adds the
corresponding kind of reset to OHCI's hc_reset() if the newly
introduced CONFIG_PCI_EHCI_DEVNO option is set (e.g. for Socrates
board).

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
Acked-by: Markus Klotzbuecher <mk@denx.de>
This commit is contained in:
Yuri Tikhonov 2008-09-04 11:19:05 +02:00 committed by Wolfgang Denk
parent 5875d358f0
commit e90fb6afab
3 changed files with 39 additions and 0 deletions
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35
drivers/usb/usb_ohci.c
View File

@ -109,6 +109,14 @@ static struct pci_device_id ohci_pci_ids[] = {
};
#endif
#ifdef CONFIG_PCI_EHCI_DEVNO
static struct pci_device_id ehci_pci_ids[] = {
{0x1131, 0x1562}, /* Philips 1562 PCI EHCI module ids */
/* Please add supported PCI EHCI controller ids here */
{0, 0}
};
#endif
#ifdef DEBUG
#define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
#else
@ -1572,11 +1580,38 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
static int hc_reset (ohci_t *ohci)
{
#ifdef CONFIG_PCI_EHCI_DEVNO
pci_dev_t pdev;
#endif
int timeout = 30;
int smm_timeout = 50; /* 0,5 sec */
dbg("%s\n", __FUNCTION__);
#ifdef CONFIG_PCI_EHCI_DEVNO
/*
* Some multi-function controllers (e.g. ISP1562) allow root hub
* resetting via EHCI registers only.
*/
pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVNO);
if (pdev != -1) {
u32 base;
int timeout = 1000;
pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
writel (readl(base + EHCI_USBCMD_OFF) | EHCI_USBCMD_HCRESET,
base + EHCI_USBCMD_OFF);
while (readl(base + EHCI_USBCMD_OFF) & EHCI_USBCMD_HCRESET) {
if (timeout-- <= 0) {
printf("USB RootHub reset timed out!");
break;
}
udelay(1);
}
} else
printf("No EHCI func at %d index!\n", CONFIG_PCI_EHCI_DEVNO);
#endif
if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
info("USB HC TakeOver from SMM");

3
drivers/usb/usb_ohci.h
View File

@ -195,6 +195,9 @@ struct ohci_regs {
} roothub;
} __attribute((aligned(32)));
/* Some EHCI controls */
#define EHCI_USBCMD_OFF 0x20
#define EHCI_USBCMD_HCRESET (1 << 1)
/* OHCI CONTROL AND STATUS REGISTER MASKS */

1
include/configs/socrates.h
View File

@ -410,6 +410,7 @@
#define CONFIG_USB_OHCI_NEW 1
#define CONFIG_PCI_OHCI 1
#define CONFIG_PCI_OHCI_DEVNO 3 /* Number in PCI list */
#define CONFIG_PCI_EHCI_DEVNO (CONFIG_PCI_OHCI_DEVNO / 2)
#define CFG_USB_OHCI_MAX_ROOT_PORTS 15
#define CFG_USB_OHCI_SLOT_NAME "ohci_pci"
#define CFG_OHCI_SWAP_REG_ACCESS 1