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Fix handling of split transfers.

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This commit is contained in:
Aleš Nesrsta 2013-04-12 20:42:46 +02:00 • committed by Vladimir 'phcoder' Serbinenko
parent 92c8f58d97
commit 51a4c3e3b0
4 changed files with 59 additions and 24 deletions
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50
grub-core/bus/usb/usbhub.c
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@ -49,7 +49,7 @@ static grub_usb_controller_dev_t grub_usb_list;
static grub_usb_device_t
grub_usb_hub_add_dev (grub_usb_controller_t controller,
grub_usb_speed_t speed,
int port, int hubaddr)
int split_hubport, int split_hubaddr)
{
grub_usb_device_t dev;
int i;
@ -63,8 +63,8 @@ grub_usb_hub_add_dev (grub_usb_controller_t controller,
dev->controller = *controller;
dev->speed = speed;
dev->port = port;
dev->hubaddr = hubaddr;
dev->split_hubport = split_hubport;
dev->split_hubaddr = split_hubaddr;
err = grub_usb_device_initialize (dev);
if (err)
@ -108,8 +108,8 @@ grub_usb_hub_add_dev (grub_usb_controller_t controller,
grub_dprintf ("usb", "Added new usb device: %p, addr=%d\n",
dev, i);
grub_dprintf ("usb", "speed=%d, port=%d, hubaddr=%d\n",
speed, port, hubaddr);
grub_dprintf ("usb", "speed=%d, split_hubport=%d, split_hubaddr=%d\n",
speed, split_hubport, split_hubaddr);
/* Wait "recovery interval", spec. says 2ms */
grub_millisleep (2);
@ -219,7 +219,12 @@ attach_root_port (struct grub_usb_hub *hub, int portno,
grub_boot_time ("Port enabled");
/* Enable the port and create a device. */
dev = grub_usb_hub_add_dev (hub->controller, speed, portno, 0);
/* High speed device needs not transaction translation
and full/low speed device cannot be connected to EHCI root hub
and full/low speed device connected to OHCI/UHCI needs not
transaction translation - e.g. hubport and hubaddr should be
always none (zero) for any device connected to any root hub. */
dev = grub_usb_hub_add_dev (hub->controller, speed, 0, 0);
hub->controller->dev->pending_reset = 0;
npending--;
if (! dev)
@ -593,6 +598,8 @@ poll_nonroot_hub (grub_usb_device_t dev)
{
grub_usb_speed_t speed;
grub_usb_device_t next_dev;
int split_hubport = 0;
int split_hubaddr = 0;
/* Determine the device speed. */
if (status & GRUB_USB_HUB_STATUS_PORT_LOWSPEED)
@ -608,8 +615,37 @@ poll_nonroot_hub (grub_usb_device_t dev)
/* Wait a recovery time after reset, spec. says 10ms */
grub_millisleep (10);
/* Find correct values for SPLIT hubport and hubaddr */
if (speed == GRUB_USB_SPEED_HIGH)
{
/* HIGH speed device needs not transaction translation */
split_hubport = 0;
split_hubaddr = 0;
}
else
/* FULL/LOW device needs hub port and hub address
for transaction translation (if connected to EHCI) */
if (dev->speed == GRUB_USB_SPEED_HIGH)
{
/* This port is the first FULL/LOW speed port
in the chain from root hub. Attached device
should use its port number and hub address */
split_hubport = i;
split_hubaddr = dev->addr;
}
else
{
/* This port is NOT the first FULL/LOW speed port
in the chain from root hub. Attached device
should use values inherited from some parent
HIGH speed hub - if any. */
split_hubport = dev->split_hubport;
split_hubaddr = dev->split_hubaddr;
}
/* Add the device and assign a device address to it. */
next_dev = grub_usb_hub_add_dev (&dev->controller, speed, i, dev->addr);
next_dev = grub_usb_hub_add_dev (&dev->controller, speed,
split_hubport, split_hubaddr);
if (dev->controller.dev->pending_reset)
{
dev->controller.dev->pending_reset = 0;