2 * This file is part of the libpayload project.
4 * Copyright (C) 2008-2010 coresystems GmbH
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 #include <libpayload-config.h>
36 #include <usb/usbdisk.h>
39 * Initializes USB controller attached to PCI
41 * @param bus PCI bus number
42 * @param dev PCI device id at bus
43 * @param func function id of the controller
46 usb_controller_initialize (int bus, int dev, int func)
54 addr = PCI_DEV (bus, dev, func);
55 class = pci_read_config32 (addr, 8);
56 pciid = pci_read_config32 (addr, 0);
58 devclass = class >> 16;
59 prog_if = (class >> 8) & 0xff;
61 /* enable busmaster */
63 #define PCI_COMMAND_MASTER 4
64 if (devclass == 0xc03) {
67 pci_command =pci_read_config32(addr, PCI_COMMAND);
68 pci_command |= PCI_COMMAND_MASTER;
69 pci_write_config32(addr, PCI_COMMAND, pci_command);
71 printf ("%02x:%02x.%x %04x:%04x.%d ", bus, dev, func,
72 pciid >> 16, pciid & 0xFFFF, func);
74 printf ("UHCI controller\n");
75 #ifdef CONFIG_USB_UHCI
78 printf ("Not supported.\n");
81 if (prog_if == 0x10) {
82 printf ("OHCI controller\n");
83 #ifdef CONFIG_USB_OHCI
86 printf ("Not supported.\n");
90 if (prog_if == 0x20) {
91 printf ("EHCI controller\n");
92 #ifdef CONFIG_USB_EHCI
94 printf ("Not supported.\n");
96 printf ("Not supported.\n");
100 if (prog_if == 0x30) {
101 printf ("xHCI controller\n");
102 #ifdef CONFIG_USB_XHCI
105 printf ("Not supported.\n");
115 * Initialize all USB controllers attached to PCI.
118 usb_initialize (void)
121 /* EHCI is defined by standards to be at a
122 * higher function than the USB1 controllers.
123 * We don't want to init USB1 + devices just to
124 * "steal" those for USB2, so make sure USB2
127 for (bus = 0; bus < 256; bus++)
128 for (dev = 0; dev < 32; dev++)
129 if (pci_read_config32 (PCI_DEV(bus, dev, 0), 8) >> 16 != 0xffff)
130 for (func = 7; func >= 0 ; func--)
131 usb_controller_initialize (bus, dev, func);