src/console/usbdebug_console.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2007 AMD
   5  * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
  19  */
  20
  21 #include <string.h>
  22 #include <console/console.h>
  23 #include <usbdebug.h>
  24 #include <pc80/mc146818rtc.h>
  25
  26 static struct ehci_debug_info dbg_info;
  27
  28 void set_ehci_base(unsigned ehci_base)
  29 {
  30         unsigned diff;
  31
  32         if (!dbg_info.ehci_debug)
  33                 return;
  34
  35         diff = (unsigned)dbg_info.ehci_caps - ehci_base;
  36         dbg_info.ehci_regs -= diff;
  37         dbg_info.ehci_debug -= diff;
  38         dbg_info.ehci_caps = (void*)ehci_base;
  39 }
  40
  41 void set_ehci_debug(unsigned ehci_debug)
  42 {
  43         dbg_info.ehci_debug = (void*)ehci_debug;
  44 }
  45
  46 unsigned get_ehci_debug(void)
  47 {
  48         return (unsigned)dbg_info.ehci_debug;
  49 }
  50
  51 static void dbgp_init(void)
  52 {
  53         struct ehci_debug_info *dbg_infox;
  54
  55         /* At this point, all we have to do is copy the fixed address
  56          * debug_info data structure to our version defined above. */
  57
  58         dbg_infox = (struct ehci_debug_info *)
  59                 ((CONFIG_RAMTOP) - sizeof(struct ehci_debug_info));
  60
  61         memcpy(&dbg_info, dbg_infox, sizeof(struct ehci_debug_info));
  62 }
  63
  64 static void dbgp_tx_byte(unsigned char data)
  65 {
  66         if (dbg_info.ehci_debug)
  67                 dbgp_bulk_write_x(&dbg_info, (char*)&data, 1);
  68 }
  69
  70 static unsigned char dbgp_rx_byte(void)
  71 {
  72         unsigned char data = 0xff;
  73
  74         if (dbg_info.ehci_debug)
  75                 dbgp_bulk_read_x(&dbg_info, &data, 1);
  76
  77         return data;
  78 }
  79
  80 static int dbgp_tst_byte(void)
  81 {
  82         return (int)dbg_info.ehci_debug;
  83 }
  84
  85 static const struct console_driver usbdebug_direct_console __console = {
  86         .init     = dbgp_init,
  87         .tx_byte  = dbgp_tx_byte,
  88         .rx_byte  = dbgp_rx_byte,
  89         .tst_byte = dbgp_tst_byte,
  90 };