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[ehci] Add extra debugging information 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2016-02-05 21:03:17 +00:00
parent d0bfd830e4
commit 17a200257a
1 changed files with 73 additions and 2 deletions
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75
src/drivers/usb/ehci.c
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@ -173,6 +173,61 @@ static int ehci_ctrl_reachable ( struct ehci_device *ehci, void *ptr ) {
return -ENOTSUP;
}
/******************************************************************************
*
* Diagnostics
*
******************************************************************************
*/
/**
* Dump host controller registers
*
* @v ehci EHCI device
*/
static __unused void ehci_dump ( struct ehci_device *ehci ) {
uint8_t caplength;
uint16_t hciversion;
uint32_t hcsparams;
uint32_t hccparams;
uint32_t usbcmd;
uint32_t usbsts;
uint32_t usbintr;
uint32_t frindex;
uint32_t ctrldssegment;
uint32_t periodiclistbase;
uint32_t asynclistaddr;
uint32_t configflag;
/* Do nothing unless debugging is enabled */
if ( ! DBG_LOG )
return;
/* Dump capability registers */
caplength = readb ( ehci->cap + EHCI_CAP_CAPLENGTH );
hciversion = readw ( ehci->cap + EHCI_CAP_HCIVERSION );
hcsparams = readl ( ehci->cap + EHCI_CAP_HCSPARAMS );
hccparams = readl ( ehci->cap + EHCI_CAP_HCCPARAMS );
DBGC ( ehci, "EHCI %s caplen %02x hciversion %04x hcsparams %08x "
"hccparams %08x\n", ehci->name, caplength, hciversion,
hcsparams, hccparams );
/* Dump operational registers */
usbcmd = readl ( ehci->op + EHCI_OP_USBCMD );
usbsts = readl ( ehci->op + EHCI_OP_USBSTS );
usbintr = readl ( ehci->op + EHCI_OP_USBINTR );
frindex = readl ( ehci->op + EHCI_OP_FRINDEX );
ctrldssegment = readl ( ehci->op + EHCI_OP_CTRLDSSEGMENT );
periodiclistbase = readl ( ehci->op + EHCI_OP_PERIODICLISTBASE );
asynclistaddr = readl ( ehci->op + EHCI_OP_ASYNCLISTADDR );
configflag = readl ( ehci->op + EHCI_OP_CONFIGFLAG );
DBGC ( ehci, "EHCI %s usbcmd %08x usbsts %08x usbint %08x frindx "
"%08x\n", ehci->name, usbcmd, usbsts, usbintr, frindex );
DBGC ( ehci, "EHCI %s ctrlds %08x period %08x asyncl %08x cfgflg "
"%08x\n", ehci->name, ctrldssegment, periodiclistbase,
asynclistaddr, configflag );
}
/******************************************************************************
*
* USB legacy support
@ -233,6 +288,14 @@ static void ehci_legacy_claim ( struct ehci_device *ehci,
if ( ! legacy )
return;
/* Dump original SMI usage */
pci_read_config_dword ( pci, ( legacy + EHCI_USBLEGSUP_CTLSTS ),
&ctlsts );
if ( ctlsts ) {
DBGC ( ehci, "EHCI %s BIOS using SMIs: %08x\n",
ehci->name, ctlsts );
}
/* Claim ownership */
pci_write_config_byte ( pci, ( legacy + EHCI_USBLEGSUP_OS ),
EHCI_USBLEGSUP_OS_OWNED );
@ -276,9 +339,11 @@ static void ehci_legacy_claim ( struct ehci_device *ehci,
*/
static void ehci_legacy_release ( struct ehci_device *ehci,
struct pci_device *pci ) {
unsigned int legacy = ehci->legacy;
uint32_t ctlsts;
/* Do nothing unless legacy support capability is present */
if ( ! ehci->legacy )
if ( ! legacy )
return;
/* Do nothing if releasing ownership is prevented */
@ -289,8 +354,14 @@ static void ehci_legacy_release ( struct ehci_device *ehci,
}
/* Release ownership */
pci_write_config_byte ( pci, ( ehci->legacy + EHCI_USBLEGSUP_OS ), 0 );
pci_write_config_byte ( pci, ( legacy + EHCI_USBLEGSUP_OS ), 0 );
DBGC ( ehci, "EHCI %s released ownership to BIOS\n", ehci->name );
/* Dump restored SMI usage */
pci_read_config_dword ( pci, ( legacy + EHCI_USBLEGSUP_CTLSTS ),
&ctlsts );
DBGC ( ehci, "EHCI %s BIOS reclaimed SMIs: %08x\n",
ehci->name, ctlsts );
}
/******************************************************************************