board/linkstation/ide.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  *
  23  */
  24 /* ide.c - ide support functions */
  25
  26
  27 #include <common.h>
  28
  29 #ifdef CONFIG_CMD_IDE
  30 #include <ata.h>
  31 #include <ide.h>
  32 #include <pci.h>
  33
  34 #define IT8212_PCI_CpuCONTROL           0x5e
  35 #define IT8212_PCI_PciModeCONTROL       0x50
  36 #define IT8212_PCI_IdeIoCONFIG          0x40
  37 #define IT8212_PCI_IdeBusSkewCONTROL    0x4c
  38 #define IT8212_PCI_IdeDrivingCURRENT    0x42
  39
  40 extern ulong ide_bus_offset[CONFIG_SYS_IDE_MAXBUS];
  41 extern struct pci_controller hose;
  42
  43 int ide_preinit (void)
  44 {
  45         int status;
  46         pci_dev_t devbusfn;
  47         int l;
  48
  49         status = 1;
  50         for (l = 0; l < CONFIG_SYS_IDE_MAXBUS; l++) {
  51                 ide_bus_offset[l] = -ATA_STATUS;
  52         }
  53         devbusfn = pci_find_device(PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_SII_680, 0);
  54         if (devbusfn == -1)
  55                 devbusfn = pci_find_device(PCI_VENDOR_ID_ITE,PCI_DEVICE_ID_ITE_8212,0);
  56         if (devbusfn != -1) {
  57                 u32 ide_bus_offset32;
  58
  59                 status = 0;
  60
  61                 pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0,
  62                                                            &ide_bus_offset32);
  63                 ide_bus_offset[0] = ide_bus_offset32 & 0xfffffffe;
  64                 ide_bus_offset[0] = pci_hose_bus_to_phys(&hose,
  65                                                 ide_bus_offset[0] & 0xfffffffe,
  66                                                 PCI_REGION_IO);
  67                 if (CONFIG_SYS_IDE_MAXBUS > 1) {
  68                         pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_2,
  69                                               (u32 *) &ide_bus_offset[1]);
  70                         ide_bus_offset[1] &= 0xfffffffe;
  71                         ide_bus_offset[1] = pci_hose_bus_to_phys(&hose,
  72                                                 ide_bus_offset[1] & 0xfffffffe,
  73                                                 PCI_REGION_IO);
  74                 }
  75         }
  76
  77         if (pci_find_device (PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8212, 0) != -1) {
  78                 pci_write_config_byte(devbusfn, IT8212_PCI_CpuCONTROL, 0x01);
  79                 pci_write_config_byte(devbusfn, IT8212_PCI_PciModeCONTROL, 0x00);
  80                 pci_write_config_word(devbusfn, PCI_COMMAND, 0x0047);
  81 #ifdef CONFIG_IT8212_SECONDARY_ENABLE
  82                 pci_write_config_word(devbusfn, IT8212_PCI_IdeIoCONFIG, 0xA0F3);
  83 #else
  84                 pci_write_config_word(devbusfn, IT8212_PCI_IdeIoCONFIG, 0x8031);
  85 #endif
  86                 pci_write_config_dword(devbusfn, IT8212_PCI_IdeBusSkewCONTROL, 0x02040204);
  87 /* __LS_COMMENT__ BUFFALO changed 2004.11.10  changed for EMI */
  88                 pci_write_config_byte(devbusfn, IT8212_PCI_IdeDrivingCURRENT, 0x36); /* 10mA */
  89 /*              pci_write_config_byte(dev, IT8212_PCI_IdeDrivingCURRENT, 0x09); */ /* 4mA */
  90 /*              pci_write_config_byte(dev, IT8212_PCI_IdeDrivingCURRENT, 0x12); */ /* 6mA */
  91 /*              pci_write_config_byte(dev, IT8212_PCI_IdeDrivingCURRENT, 0x24); */ /* 6mA,2mA */
  92 /*              pci_write_config_byte(dev, IT8212_PCI_IdeDrivingCURRENT, 0x2D); */ /* 8mA,4mA */
  93                 pci_write_config_byte(devbusfn, PCI_LATENCY_TIMER, 0x00);
  94         }
  95
  96         return (status);
  97 }
  98
  99 void ide_set_reset (int flag) {
 100         return;
 101 }
 102
 103 #endif /* CONFIG_CMD_IDE */