1b33c31cf3
The usb_initialize function would scan for USB host controllers by brute force iterating over all possible busses, devices, and functions. This change makes it recursively scan busses only if it finds them on the other side of a bridge, and only scan for functions beyond function 0 if the device claims to be multifunction. This change also takes the opportunity to clean up some style problems throughout the file. Change-Id: I0f5e8b9a454a42a76d30bccca898c8e1af770b2b Signed-off-by: Gabe Black <gabeblack@google.com> Reviewed-on: http://review.coreboot.org/1736 Reviewed-by: Patrick Georgi <patrick@georgi-clan.de> Tested-by: build bot (Jenkins)
161 lines
4.4 KiB
C
161 lines
4.4 KiB
C
/*
|
|
* This file is part of the libpayload project.
|
|
*
|
|
* Copyright (C) 2008-2010 coresystems GmbH
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <libpayload-config.h>
|
|
#include <usb/usb.h>
|
|
#include "uhci.h"
|
|
#include "ohci.h"
|
|
#include "ehci.h"
|
|
#include "xhci.h"
|
|
#include <usb/usbdisk.h>
|
|
|
|
/**
|
|
* Initializes USB controller attached to PCI
|
|
*
|
|
* @param bus PCI bus number
|
|
* @param dev PCI device id at bus
|
|
* @param func function id of the controller
|
|
*/
|
|
int usb_controller_initialize(int bus, int dev, int func)
|
|
{
|
|
u32 class;
|
|
u32 devclass;
|
|
u32 prog_if;
|
|
pcidev_t addr;
|
|
u32 pciid;
|
|
|
|
addr = PCI_DEV (bus, dev, func);
|
|
class = pci_read_config32(addr, 8);
|
|
pciid = pci_read_config32(addr, 0);
|
|
|
|
devclass = class >> 16;
|
|
prog_if = (class >> 8) & 0xff;
|
|
|
|
/* enable busmaster */
|
|
#define PCI_COMMAND 4
|
|
#define PCI_COMMAND_MASTER 4
|
|
if (devclass == 0xc03) {
|
|
u32 pci_command;
|
|
|
|
pci_command = pci_read_config32(addr, PCI_COMMAND);
|
|
pci_command |= PCI_COMMAND_MASTER;
|
|
pci_write_config32(addr, PCI_COMMAND, pci_command);
|
|
|
|
printf("%02x:%02x.%x %04x:%04x.%d ", bus, dev, func,
|
|
pciid >> 16, pciid & 0xFFFF, func);
|
|
switch (prog_if) {
|
|
case 0x00:
|
|
#ifdef CONFIG_USB_UHCI
|
|
printf("UHCI controller\n");
|
|
uhci_init (addr);
|
|
#else
|
|
printf("UHCI controller (not supported)\n");
|
|
#endif
|
|
break;
|
|
|
|
case 0x10:
|
|
#ifdef CONFIG_USB_OHCI
|
|
printf("OHCI controller\n");
|
|
ohci_init(addr);
|
|
#else
|
|
printf("OHCI controller (not supported)\n");
|
|
#endif
|
|
break;
|
|
|
|
case 0x20:
|
|
#ifdef CONFIG_USB_EHCI
|
|
printf("EHCI controller\n");
|
|
ehci_init(addr);
|
|
#else
|
|
printf("EHCI controller (not supported)\n");
|
|
#endif
|
|
break;
|
|
|
|
case 0x30:
|
|
#ifdef CONFIG_USB_XHCI
|
|
printf("xHCI controller\n");
|
|
xhci_init(addr);
|
|
#else
|
|
printf("xHCI controller (not supported)\n");
|
|
#endif
|
|
break;
|
|
|
|
default:
|
|
printf("unknown controller %x not supported\n",
|
|
prog_if);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void usb_scan_pci_bus(int bus)
|
|
{
|
|
int dev, func;
|
|
for (dev = 0; dev < 32; dev++) {
|
|
u8 header_type;
|
|
pcidev_t addr = PCI_DEV(bus, dev, 0);
|
|
/* Check if there's a device here at all. */
|
|
if (pci_read_config32(addr, REG_VENDOR_ID) == 0xffff)
|
|
continue;
|
|
header_type = pci_read_config8(addr, REG_HEADER_TYPE);
|
|
/* If this is a bridge, scan the bus on the other side. */
|
|
if ((header_type & ~HEADER_TYPE_MULTIFUNCTION) ==
|
|
HEADER_TYPE_BRIDGE) {
|
|
int sub_bus =
|
|
pci_read_config8(addr, REG_SECONDARY_BUS);
|
|
usb_scan_pci_bus(sub_bus);
|
|
continue;
|
|
}
|
|
/*
|
|
* EHCI is defined by standards to be at a higher function
|
|
* than the USB1 controllers. We don't want to init USB1 +
|
|
* devices just to "steal" those for USB2, so make sure USB2
|
|
* comes first.
|
|
*/
|
|
/* Check for a multifunction device. */
|
|
if (header_type & HEADER_TYPE_MULTIFUNCTION)
|
|
for (func = 7; func > 0; func--)
|
|
usb_controller_initialize(bus, dev, func);
|
|
/* Initialize function 0. */
|
|
usb_controller_initialize(bus, dev, 0);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initialize all USB controllers attached to PCI.
|
|
*/
|
|
int usb_initialize(void)
|
|
{
|
|
usb_scan_pci_bus(0);
|
|
usb_poll();
|
|
return 0;
|
|
}
|