ide.c

来自「最新版的u-boot,2008-10-18发布」· C语言 代码 · 共 100 行

/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, [e-mail].
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */
/* ide.c - ide support functions */


#include <common.h>

#ifdef CONFIG_CMD_IDE
#include <ata.h>
#include <ide.h>
#include <pci.h>

#define IT8212_PCI_CpuCONTROL		0x5e
#define IT8212_PCI_PciModeCONTROL	0x50
#define IT8212_PCI_IdeIoCONFIG		0x40
#define IT8212_PCI_IdeBusSkewCONTROL	0x4c
#define IT8212_PCI_IdeDrivingCURRENT	0x42

extern ulong ide_bus_offset[CFG_IDE_MAXBUS];
extern struct pci_controller hose;

int ide_preinit (void)
{
	int status;
	pci_dev_t devbusfn;
	int l;

	status = 1;
	for (l = 0; l < CFG_IDE_MAXBUS; l++) {
		ide_bus_offset[l] = -ATA_STATUS;
	}
	devbusfn = pci_find_device(PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_SII_680, 0);
	if (devbusfn == -1)
		devbusfn = pci_find_device(PCI_VENDOR_ID_ITE,PCI_DEVICE_ID_ITE_8212,0);
	if (devbusfn != -1) {
		status = 0;

		pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0,
							   (u32 *) &ide_bus_offset[0]);
		ide_bus_offset[0] &= 0xfffffffe;
		ide_bus_offset[0] = pci_hose_bus_to_phys(&hose,
							 ide_bus_offset[0] & 0xfffffffe,
							 PCI_REGION_IO);
		pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_2,
				      (u32 *) &ide_bus_offset[1]);
		ide_bus_offset[1] &= 0xfffffffe;
		ide_bus_offset[1] = pci_hose_bus_to_phys(&hose,
							 ide_bus_offset[1] & 0xfffffffe,
							 PCI_REGION_IO);
	}

	if (pci_find_device (PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8212, 0) != -1) {
		pci_write_config_byte(devbusfn, IT8212_PCI_CpuCONTROL, 0x01);
		pci_write_config_byte(devbusfn, IT8212_PCI_PciModeCONTROL, 0x00);
		pci_write_config_word(devbusfn, PCI_COMMAND, 0x0047);
#ifdef CONFIG_IT8212_SECONDARY_ENABLE
		pci_write_config_word(devbusfn, IT8212_PCI_IdeIoCONFIG, 0xA0F3);
#else
		pci_write_config_word(devbusfn, IT8212_PCI_IdeIoCONFIG, 0x8031);
#endif
		pci_write_config_dword(devbusfn, IT8212_PCI_IdeBusSkewCONTROL, 0x02040204);
/* __LS_COMMENT__ BUFFALO changed 2004.11.10  changed for EMI */
		pci_write_config_byte(devbusfn, IT8212_PCI_IdeDrivingCURRENT, 0x36); /* 10mA */
/*		pci_write_config_byte(dev, IT8212_PCI_IdeDrivingCURRENT, 0x09); */ /* 4mA */
/*		pci_write_config_byte(dev, IT8212_PCI_IdeDrivingCURRENT, 0x12); */ /* 6mA */
/*		pci_write_config_byte(dev, IT8212_PCI_IdeDrivingCURRENT, 0x24); */ /* 6mA,2mA */
/*		pci_write_config_byte(dev, IT8212_PCI_IdeDrivingCURRENT, 0x2D); */ /* 8mA,4mA */
		pci_write_config_byte(devbusfn, PCI_LATENCY_TIMER, 0x00);
	}

	return (status);
}

void ide_set_reset (int flag) {
	return;
}

#endif /* CONFIG_CMD_IDE */