payloads/libpayload/drivers/usb/usbinit.c

   1 /*
   2  *
   3  * Copyright (C) 2008-2010 coresystems GmbH
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 //#define USB_DEBUG
  30 #include <libpayload-config.h>
  31 #include <usb/usb.h>
  32 #include "uhci.h"
  33 #include "ohci.h"
  34 #include "ehci.h"
  35 #include "xhci.h"
  36 #include "dwc2.h"
  37 #include <usb/usbdisk.h>
  38
  39 #if CONFIG(LP_USB_PCI)
  40 /**
  41  * Initializes USB controller attached to PCI
  42  *
  43  * @param bus PCI bus number
  44  * @param dev PCI device id at bus
  45  * @param func function id of the controller
  46  */
  47 static int usb_controller_initialize(int bus, int dev, int func)
  48 {
  49         u32 class;
  50         u32 devclass;
  51         u32 prog_if;
  52         pcidev_t pci_device;
  53         u32 pciid;
  54
  55         pci_device = PCI_DEV(bus, dev, func);
  56         class = pci_read_config32(pci_device, 8);
  57         pciid = pci_read_config32(pci_device, 0);
  58
  59         devclass = class >> 16;
  60         prog_if = (class >> 8) & 0xff;
  61
  62         /* enable busmaster */
  63         if (devclass == 0xc03) {
  64                 u16 pci_command;
  65
  66                 pci_command = pci_read_config16(pci_device, PCI_COMMAND);
  67                 pci_command |= PCI_COMMAND_MASTER;
  68                 pci_write_config16(pci_device, PCI_COMMAND, pci_command);
  69
  70                 usb_debug("%02x:%02x.%x %04x:%04x.%d ", bus, dev, func,
  71                         pciid >> 16, pciid & 0xFFFF, func);
  72                 switch (prog_if) {
  73                 case 0x00:
  74 #if CONFIG(LP_USB_UHCI)
  75                         usb_debug("UHCI controller\n");
  76                         uhci_pci_init(pci_device);
  77 #else
  78                         usb_debug("UHCI controller (not supported)\n");
  79 #endif
  80                         break;
  81
  82                 case 0x10:
  83 #if CONFIG(LP_USB_OHCI)
  84                         usb_debug("OHCI controller\n");
  85                         ohci_pci_init(pci_device);
  86 #else
  87                         usb_debug("OHCI controller (not supported)\n");
  88 #endif
  89                         break;
  90
  91                 case 0x20:
  92 #if CONFIG(LP_USB_EHCI)
  93                         usb_debug("EHCI controller\n");
  94                         ehci_pci_init(pci_device);
  95 #else
  96                         usb_debug("EHCI controller (not supported)\n");
  97 #endif
  98                         break;
  99
 100                 case 0x30:
 101 #if CONFIG(LP_USB_XHCI)
 102                         usb_debug("xHCI controller\n");
 103                         xhci_pci_init(pci_device);
 104 #else
 105                         usb_debug("xHCI controller (not supported)\n");
 106 #endif
 107                         break;
 108
 109                 default:
 110                         usb_debug("unknown controller %x not supported\n",
 111                                prog_if);
 112                         break;
 113                 }
 114         }
 115
 116         return 0;
 117 }
 118
 119 static void usb_scan_pci_bus(int bus)
 120 {
 121         int dev, func;
 122         for (dev = 0; dev < 32; dev++) {
 123                 u8 header_type;
 124                 pcidev_t pci_device = PCI_DEV(bus, dev, 0);
 125
 126                 /* Check if there's a device here at all. */
 127                 if (pci_read_config32(pci_device, REG_VENDOR_ID) == 0xffffffff)
 128                         continue;
 129
 130                 /*
 131                  * EHCI is defined by standards to be at a higher function
 132                  * than the USB1 controllers. We don't want to init USB1 +
 133                  * devices just to "steal" those for USB2, so make sure USB2
 134                  * comes first by scanning multifunction devices from 7 to 0.
 135                  */
 136
 137                 /* Check for a multifunction device. */
 138                 header_type = pci_read_config8(pci_device, REG_HEADER_TYPE);
 139                 if (header_type & HEADER_TYPE_MULTIFUNCTION)
 140                         func = 7;
 141                 else
 142                         func = 0;
 143
 144                 for (; func >= 0; func--) {
 145                         pci_device = PCI_DEV(bus, dev, func);
 146                         header_type = pci_read_config8(pci_device, REG_HEADER_TYPE);
 147                         /* If this is a bridge, scan the other side. */
 148                         if ((header_type & ~HEADER_TYPE_MULTIFUNCTION) ==
 149                                         HEADER_TYPE_BRIDGE) {
 150                                 /* Verify that the bridge is enabled */
 151                                 if ((pci_read_config16(pci_device, REG_COMMAND)
 152                                                 & 3) != 0)
 153                                         usb_scan_pci_bus(pci_read_config8(
 154                                                 pci_device, REG_SECONDARY_BUS));
 155                         }
 156                         else
 157                                 usb_controller_initialize(bus, dev, func);
 158                 }
 159         }
 160 }
 161 #endif
 162
 163 /**
 164  * Initialize all USB controllers attached to PCI.
 165  */
 166 int usb_initialize(void)
 167 {
 168 #if CONFIG(LP_USB_PCI)
 169         usb_scan_pci_bus(0);
 170 #endif
 171         return 0;
 172 }
 173
 174 hci_t *usb_add_mmio_hc(hc_type type, void *bar)
 175 {
 176         switch (type) {
 177 #if CONFIG(LP_USB_OHCI)
 178         case OHCI:
 179                 return ohci_init((unsigned long)bar);
 180 #endif
 181 #if CONFIG(LP_USB_EHCI)
 182         case EHCI:
 183                 return ehci_init((unsigned long)bar);
 184 #endif
 185 #if CONFIG(LP_USB_DWC2)
 186         case DWC2:
 187                 return dwc2_init(bar);
 188 #endif
 189 #if CONFIG(LP_USB_XHCI)
 190         case XHCI:
 191                 return xhci_init((unsigned long)bar);
 192 #endif
 193         default:
 194                 usb_debug("HC type %d (at %p) is not supported!\n", type, bar);
 195                 return NULL;
 196         }
 197 }