drivers/block/sil680.c

   1 /*
   2  * (C) Copyright 2007
   3  * Gary Jennejohn, DENX Software Engineering, garyj@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 /* sil680.c - ide support functions for the Sil0680A controller */
  25
  26 /*
  27  * The following parameters must be defined in the configuration file
  28  * of the target board:
  29  *
  30  * #define CFG_IDE_SIL680
  31  *
  32  * #define CONFIG_PCI_PNP
  33  * NOTE it may also be necessary to define this if the default of 8 is
  34  * incorrect for the target board (e.g. the sequoia board requires 0).
  35  * #define CFG_PCI_CACHE_LINE_SIZE      0
  36  *
  37  * #define CONFIG_CMD_IDE
  38  * #undef  CONFIG_IDE_8xx_DIRECT
  39  * #undef  CONFIG_IDE_LED
  40  * #undef  CONFIG_IDE_RESET
  41  * #define CONFIG_IDE_PREINIT
  42  * #define CFG_IDE_MAXBUS               2 - modify to suit
  43  * #define CFG_IDE_MAXDEVICE    (CFG_IDE_MAXBUS*2) - modify to suit
  44  * #define CFG_ATA_BASE_ADDR    0
  45  * #define CFG_ATA_IDE0_OFFSET  0
  46  * #define CFG_ATA_IDE1_OFFSET  0
  47  * #define CFG_ATA_DATA_OFFSET  0
  48  * #define CFG_ATA_REG_OFFSET   0
  49  * #define CFG_ATA_ALT_OFFSET   0x0004
  50  *
  51  * The mapping for PCI IO-space.
  52  * NOTE this is the value for the sequoia board. Modify to suit.
  53  * #define CFG_PCI0_IO_SPACE   0xE8000000
  54  */
  55
  56 #include <common.h>
  57 #if defined(CFG_IDE_SIL680)
  58 #include <ata.h>
  59 #include <ide.h>
  60 #include <pci.h>
  61
  62 extern ulong ide_bus_offset[CFG_IDE_MAXBUS];
  63
  64 int ide_preinit (void)
  65 {
  66         int status;
  67         pci_dev_t devbusfn;
  68         int l;
  69
  70         status = 1;
  71         for (l = 0; l < CFG_IDE_MAXBUS; l++) {
  72                 ide_bus_offset[l] = -ATA_STATUS;
  73         }
  74         devbusfn = pci_find_device (0x1095, 0x0680, 0);
  75         if (devbusfn != -1) {
  76                 status = 0;
  77
  78                 pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0,
  79                                        (u32 *) &ide_bus_offset[0]);
  80                 ide_bus_offset[0] &= 0xfffffff8;
  81                 ide_bus_offset[0] += CFG_PCI0_IO_SPACE;
  82                 pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_2,
  83                                        (u32 *) &ide_bus_offset[1]);
  84                 ide_bus_offset[1] &= 0xfffffff8;
  85                 ide_bus_offset[1] += CFG_PCI0_IO_SPACE;
  86                 /* init various things - taken from the Linux driver */
  87                 /* set PIO mode */
  88                 pci_write_config_byte(devbusfn, 0x80, 0x00);
  89                 pci_write_config_byte(devbusfn, 0x84, 0x00);
  90                 /* IDE0 */
  91                 pci_write_config_byte(devbusfn,  0xA1, 0x02);
  92                 pci_write_config_word(devbusfn,  0xA2, 0x328A);
  93                 pci_write_config_dword(devbusfn, 0xA4, 0x62DD62DD);
  94                 pci_write_config_dword(devbusfn, 0xA8, 0x43924392);
  95                 pci_write_config_dword(devbusfn, 0xAC, 0x40094009);
  96                 /* IDE1 */
  97                 pci_write_config_byte(devbusfn,  0xB1, 0x02);
  98                 pci_write_config_word(devbusfn,  0xB2, 0x328A);
  99                 pci_write_config_dword(devbusfn, 0xB4, 0x62DD62DD);
 100                 pci_write_config_dword(devbusfn, 0xB8, 0x43924392);
 101                 pci_write_config_dword(devbusfn, 0xBC, 0x40094009);
 102         }
 103         return (status);
 104 }
 105
 106 void ide_set_reset (int flag) {
 107         return;
 108 }
 109
 110 #endif /* CFG_IDE_SIL680 */