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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2010 Andrew Morgan <ziltro@ziltro.com>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if defined(__i386__) || defined(__x86_64__)
#include <stdlib.h>
#include "flash.h"
#include "programmer.h"
#define PCI_VENDOR_ID_NATSEMI 0x100b
#define BOOT_ROM_ADDR 0x50
#define BOOT_ROM_DATA 0x54
const struct pcidev_status nics_natsemi[] = {
{0x100b, 0x0020, NT, "National Semiconductor", "DP83815/DP83816"},
{0x100b, 0x0022, NT, "National Semiconductor", "DP83820"},
{},
};
static int nicnatsemi_shutdown(void *data)
{
pci_cleanup(pacc);
release_io_perms();
return 0;
}
int nicnatsemi_init(void)
{
get_io_perms();
io_base_addr = pcidev_init(PCI_BASE_ADDRESS_0, nics_natsemi);
buses_supported = CHIP_BUSTYPE_PARALLEL;
/* The datasheet shows address lines MA0-MA16 in one place and MA0-MA15
* in another. My NIC has MA16 connected to A16 on the boot ROM socket
* so I'm assuming it is accessible. If not then next line wants to be
* max_rom_decode.parallel = 65536; and the mask in the read/write
* functions below wants to be 0x0000FFFF.
*/
max_rom_decode.parallel = 131072;
if (register_shutdown(nicnatsemi_shutdown, NULL))
return 1;
return 0;
}
void nicnatsemi_chip_writeb(uint8_t val, chipaddr addr)
{
OUTL((uint32_t)addr & 0x0001FFFF, io_base_addr + BOOT_ROM_ADDR);
/*
* The datasheet requires 32 bit accesses to this register, but it seems
* that requirement might only apply if the register is memory mapped.
* Bits 8-31 of this register are apparently don't care, and if this
* register is I/O port mapped, 8 bit accesses to the lowest byte of the
* register seem to work fine. Due to that, we ignore the advice in the
* data sheet.
*/
OUTB(val, io_base_addr + BOOT_ROM_DATA);
}
uint8_t nicnatsemi_chip_readb(const chipaddr addr)
{
OUTL(((uint32_t)addr & 0x0001FFFF), io_base_addr + BOOT_ROM_ADDR);
/*
* The datasheet requires 32 bit accesses to this register, but it seems
* that requirement might only apply if the register is memory mapped.
* Bits 8-31 of this register are apparently don't care, and if this
* register is I/O port mapped, 8 bit accesses to the lowest byte of the
* register seem to work fine. Due to that, we ignore the advice in the
* data sheet.
*/
return INB(io_base_addr + BOOT_ROM_DATA);
}
#else
#error PCI port I/O access is not supported on this architecture yet.
#endif
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