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libpayload: Fix OHCI some more 

OHCI works when USB_DEBUG is disabled, but not, when disabled.
This is because the controller requires some more time after a
schedule has finished.

Also improve compliance with the OHCI spec.

Change-Id: I4685cc485ff9c52b489fbaa352ab889671cff876
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/365
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Patrick Georgi 2011-10-27 13:08:13 +02:00 committed by Stefan Reinauer
parent 5ff7c13e85
commit dd69063289
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
payloads/libpayload/drivers/usb/ohci.c
View File

@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#define USB_DEBUG
//#define USB_DEBUG
#include <arch/virtual.h>
#include <usb/usb.h>
@ -141,9 +141,6 @@ ohci_init (pcidev_t addr)
OHCI_INST (controller)->opreg->HcHCCA = virt_to_phys(OHCI_INST (controller)->hcca);
OHCI_INST (controller)->opreg->HcControl &= ~IsochronousEnable; // unused by this driver
OHCI_INST (controller)->opreg->HcControl |= BulkListEnable; // always enabled. OHCI still sleeps on BulkListFilled
OHCI_INST (controller)->opreg->HcControl |= ControlListEnable; // dito
OHCI_INST (controller)->opreg->HcControl |= PeriodicListEnable; // FIXME: setup interrupt data structures and enable all the time
// disable everything, contrary to what OHCI spec says in 5.1.1.4, as we don't need IRQs
OHCI_INST (controller)->opreg->HcInterruptEnable = 1<<31;
OHCI_INST (controller)->opreg->HcInterruptDisable = ~(1<<31);
@ -191,9 +188,9 @@ dump_td(td_t *cur, int level)
#ifdef USB_DEBUG
static const char *spaces=" ";
const char *spc=spaces+(10-level);
#endif
debug("%std at %x (%s), condition code: %s\n", spc, cur, direction[cur->direction], completion_codes[cur->condition_code & 0xf]);
debug("%s toggle: %x\n", spc, cur->toggle);
#endif
}
static int
@ -215,6 +212,7 @@ wait_for_ed(usbdev_t *dev, ed_t *head)
((td_t*)phys_to_virt(head->head_pointer & ~3))->condition_code);
mdelay(1);
}
mdelay(5);
if (OHCI_INST(dev->controller)->opreg->HcInterruptStatus & WritebackDoneHead) {
debug("done queue:\n");
debug("%x, %x\n", OHCI_INST(dev->controller)->hcca->HccaDoneHead, phys_to_virt(OHCI_INST(dev->controller)->hcca->HccaDoneHead));
@ -223,7 +221,6 @@ wait_for_ed(usbdev_t *dev, ed_t *head)
}
td_t *done_queue = NULL;
td_t *done_head = (td_t*)phys_to_virt(OHCI_INST(dev->controller)->hcca->HccaDoneHead);
OHCI_INST(dev->controller)->opreg->HcInterruptStatus = WritebackDoneHead;
while (1) {
td_t *oldnext = (td_t*)phys_to_virt(done_head->next_td);
if (oldnext == done_queue) break; /* last element refers to second to last, ie. endless loop */
@ -236,6 +233,7 @@ wait_for_ed(usbdev_t *dev, ed_t *head)
for (cur = done_queue; cur != 0; cur = (td_t*)cur->next_td) {
dump_td(cur, 1);
}
OHCI_INST(dev->controller)->opreg->HcInterruptStatus &= ~WritebackDoneHead;
}
if (head->head_pointer & 1) {
@ -340,9 +338,11 @@ ohci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq, int dalen
/* activate schedule */
OHCI_INST(dev->controller)->opreg->HcControlHeadED = virt_to_phys(head);
OHCI_INST(dev->controller)->opreg->HcControl |= ControlListEnable;
OHCI_INST(dev->controller)->opreg->HcCommandStatus = ControlListFilled;
int failure = wait_for_ed(dev, head);
OHCI_INST(dev->controller)->opreg->HcControl &= ~ControlListEnable;
/* free memory */
free((void*)tds);
@ -430,9 +430,11 @@ ohci_bulk (endpoint_t *ep, int dalen, u8 *data, int finalize)
/* activate schedule */
OHCI_INST(ep->dev->controller)->opreg->HcBulkHeadED = virt_to_phys(head);
OHCI_INST(ep->dev->controller)->opreg->HcControl |= BulkListEnable;
OHCI_INST(ep->dev->controller)->opreg->HcCommandStatus = BulkListFilled;
int failure = wait_for_ed(ep->dev, head);
OHCI_INST(ep->dev->controller)->opreg->HcControl &= ~BulkListEnable;
ep->toggle = head->toggle;