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/*
* 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
*/
static int usb_controller_initialize(int bus, int dev, int func)
{
u32 class;
u32 devclass;
u32 prog_if;
pcidev_t pci_device;
u32 pciid;
pci_device = PCI_DEV (bus, dev, func);
class = pci_read_config32(pci_device, 8);
pciid = pci_read_config32(pci_device, 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(pci_device, PCI_COMMAND);
pci_command |= PCI_COMMAND_MASTER;
pci_write_config32(pci_device, PCI_COMMAND, pci_command);
usb_debug("%02x:%02x.%x %04x:%04x.%d ", bus, dev, func,
pciid >> 16, pciid & 0xFFFF, func);
switch (prog_if) {
case 0x00:
#ifdef CONFIG_USB_UHCI
usb_debug("UHCI controller\n");
uhci_init (pci_device);
#else
usb_debug("UHCI controller (not supported)\n");
#endif
break;
case 0x10:
#ifdef CONFIG_USB_OHCI
usb_debug("OHCI controller\n");
ohci_init(pci_device);
#else
usb_debug("OHCI controller (not supported)\n");
#endif
break;
case 0x20:
#ifdef CONFIG_USB_EHCI
usb_debug("EHCI controller\n");
ehci_init(pci_device);
#else
usb_debug("EHCI controller (not supported)\n");
#endif
break;
case 0x30:
#ifdef CONFIG_USB_XHCI
usb_debug("xHCI controller\n");
xhci_init(pci_device);
#else
usb_debug("xHCI controller (not supported)\n");
#endif
break;
default:
usb_debug("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 pci_device = PCI_DEV(bus, dev, 0);
/* Check if there's a device here at all. */
if (pci_read_config32(pci_device, REG_VENDOR_ID) == 0xffffffff)
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 by scanning multifunction devices from 7 to 0.
*/
/* Check for a multifunction device. */
header_type = pci_read_config8(pci_device, REG_HEADER_TYPE);
if (header_type & HEADER_TYPE_MULTIFUNCTION)
func = 7;
else
func = 0;
for (; func >= 0; func--) {
pci_device = PCI_DEV(bus, dev, func);
header_type = pci_read_config8(pci_device, REG_HEADER_TYPE);
/* If this is a bridge, scan the other side. */
if ((header_type & ~HEADER_TYPE_MULTIFUNCTION) ==
HEADER_TYPE_BRIDGE)
usb_scan_pci_bus(pci_read_config8(pci_device,
REG_SECONDARY_BUS));
else
usb_controller_initialize(bus, dev, func);
}
}
}
/**
* Initialize all USB controllers attached to PCI.
*/
int usb_initialize(void)
{
usb_scan_pci_bus(0);
return 0;
}
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