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authorYuri Tikhonov <yur@emcraft.com>2008-09-04 11:19:05 +0200
committerWolfgang Denk <wd@denx.de>2008-09-06 01:24:55 +0200
commite90fb6afab2c0c074dfb67bacb4de179eb188a24 (patch)
treed0cb5743f747384543690ca93f2bbd2aeba99756 /drivers
parent5875d358f025c1b042d8a0f08384b756de7256c9 (diff)
USB EHCI: reset root hub
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/usb_ohci.c35
-rw-r--r--drivers/usb/usb_ohci.h3
2 files changed, 38 insertions, 0 deletions
diff --git a/drivers/usb/usb_ohci.c b/drivers/usb/usb_ohci.c
index 0bfa4d782a..fd5567f713 100644
--- a/drivers/usb/usb_ohci.c
+++ b/drivers/usb/usb_ohci.c
@@ -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");
diff --git a/drivers/usb/usb_ohci.h b/drivers/usb/usb_ohci.h
index 380cb4c927..7a04bf5e8a 100644
--- a/drivers/usb/usb_ohci.h
+++ b/drivers/usb/usb_ohci.h
@@ -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 */