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Improve the error interrupt handler. In particular, read the

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error address on a decoding error to unlatch it and to allow
us to print a better diagnostics message. This also has the
side effect of clearing the condition, which prevents an
interrupt storm.
This commit is contained in:
Marcel Moolenaar 2011-02-08 22:16:29 +00:00
parent a66410ec84
commit 6a9f4949fb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=218461
1 changed files with 14 additions and 9 deletions
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23
sys/dev/usb/controller/ehci_mv.c
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@ -93,8 +93,9 @@ static void *ih_err;
/* EHCI HC regs start at this offset within USB range */
#define MV_USB_HOST_OFST 0x0100
#define USB_BRIDGE_INTR_CAUSE 0x210
#define USB_BRIDGE_INTR_MASK 0x214
#define USB_BRIDGE_INTR_CAUSE 0x210
#define USB_BRIDGE_INTR_MASK 0x214
#define USB_BRIDGE_ERR_ADDR 0x21C
#define MV_USB_ADDR_DECODE_ERR (1 << 0)
#define MV_USB_HOST_UNDERFLOW (1 << 1)
@ -345,18 +346,22 @@ err_intr(void *arg)
cause = EREAD4(sc, USB_BRIDGE_INTR_CAUSE);
if (cause) {
printf("IRQ ERR: cause: 0x%08x\n", cause);
if (cause & MV_USB_ADDR_DECODE_ERR)
printf("IRQ ERR: Address decoding error\n");
printf("USB error: ");
if (cause & MV_USB_ADDR_DECODE_ERR) {
uint32_t addr;
addr = EREAD4(sc, USB_BRIDGE_ERR_ADDR);
printf("address decoding error (addr=%#x)\n", addr);
}
if (cause & MV_USB_HOST_UNDERFLOW)
printf("IRQ ERR: USB Host Underflow\n");
printf("host underflow\n");
if (cause & MV_USB_HOST_OVERFLOW)
printf("IRQ ERR: USB Host Overflow\n");
printf("host overflow\n");
if (cause & MV_USB_DEVICE_UNDERFLOW)
printf("IRQ ERR: USB Device Underflow\n");
printf("device underflow\n");
if (cause & ~(MV_USB_ADDR_DECODE_ERR | MV_USB_HOST_UNDERFLOW |
MV_USB_HOST_OVERFLOW | MV_USB_DEVICE_UNDERFLOW))
printf("IRQ ERR: Unknown error\n");
printf("unknown cause (cause=%#x)\n", cause);
EWRITE4(sc, USB_BRIDGE_INTR_CAUSE, 0);
}