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libpayload: Add support for split transactions in EHCI

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With split transactions, the EHCI host controller can handle full- and
low-speed devices on hubs in high-speed mode. This adds support for split
transactions for control and bulk transfers.

Change-Id: I30fa1ce25757f33b1e6ed34207949c9255f05d49
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1081
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Nico Huber
2012-05-23 09:21:54 +02:00
committed by Stefan Reinauer
parent d5d024f3e5
commit 1ab6075320
4 changed files with 53 additions and 12 deletions
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12
payloads/libpayload/drivers/usb/usb.c
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@@ -245,8 +245,8 @@ get_free_address (hci_t *controller)
return -1; // no free address
}
int
set_address (hci_t *controller, int speed)
static int
set_address (hci_t *controller, int speed, int hubport, int hubaddr)
{
int adr = get_free_address (controller); // address to set
dev_req_t dr;
@@ -266,6 +266,8 @@ set_address (hci_t *controller, int speed)
usbdev_t *dev = controller->devices[adr];
// dummy values for registering the address
dev->address = 0;
dev->hub = hubaddr;
dev->port = hubport;
dev->speed = speed;
dev->endpoints[0].dev = dev;
dev->endpoints[0].endpoint = 0;
@@ -469,14 +471,10 @@ usb_attach_device(hci_t *controller, int hubaddress, int port, int speed)
{
static const char* speeds[] = { "full", "low", "high" };
debug ("%sspeed device\n", (speed <= 2) ? speeds[speed] : "invalid value - no");
int newdev = set_address (controller, speed);
int newdev = set_address (controller, speed, port, hubaddress);
if (newdev == -1)
return -1;
usbdev_t *newdev_t = controller->devices[newdev];
newdev_t->address = newdev;
newdev_t->hub = hubaddress;
newdev_t->port = port;
// determine responsible driver - current done in set_address
newdev_t->init (newdev_t);
return newdev;