/* * (C) Copyright 2002 ELTEC Elektronik AG * Frank Gottschling <fgottschling@eltec.de> * * 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 *//* * SRom I/O routines. */#include <common.h>#include <pci.h>#include "srom.h"#define SROM_RD         0x00004000    /* Read from Boot ROM */#define SROM_WR         0x00002000    /* Write to Boot ROM */#define SROM_SR         0x00000800    /* Select Serial ROM when set */#define DT_IN           0x00000004    /* Serial Data In */#define DT_CLK          0x00000002    /* Serial ROM Clock */#define DT_CS           0x00000001    /* Serial ROM Chip Select */static u_int         dc_srom_iobase;/*----------------------------------------------------------------------------*/static int inl(u_long addr){    return le32_to_cpu(*(volatile u_long *)(addr));}/*----------------------------------------------------------------------------*/static void outl (int command, u_long addr){    *(volatile u_long *)(addr) = cpu_to_le32(command);}/*----------------------------------------------------------------------------*/static void sendto_srom(u_int command, u_long addr){    outl(command, addr);    udelay(1);    return;}/*----------------------------------------------------------------------------*/static int getfrom_srom(u_long addr){    s32 tmp;    tmp = inl(addr);    udelay(1);    return tmp;}/*----------------------------------------------------------------------------*/static void srom_latch (u_int command, u_long addr){    sendto_srom (command, addr);    sendto_srom (command | DT_CLK, addr);    sendto_srom (command, addr);    return;}/*----------------------------------------------------------------------------*/static void srom_command_rd (u_int command, u_long addr){    srom_latch (command, addr);    srom_latch (command, addr);    srom_latch ((command & 0x0000ff00) | DT_CS, addr);    return;}/*----------------------------------------------------------------------------*/static void srom_command_wr (u_int command, u_long addr){    srom_latch (command, addr);    srom_latch ((command & 0x0000ff00) | DT_CS, addr);    srom_latch (command, addr);    return;}/*----------------------------------------------------------------------------*/static void srom_address(u_int command, u_long addr, u_char offset){    int i;    signed char a;    a = (char)(offset << 2);    for (i=0; i<6; i++, a <<= 1)    {	srom_latch(command | ((a < 0) ? DT_IN : 0), addr);    }    udelay(1);    i = (getfrom_srom(addr) >> 3) & 0x01;    return;}/*----------------------------------------------------------------------------*/static short srom_data_rd (u_int command, u_long addr){    int i;    short word = 0;    s32 tmp;    for (i=0; i<16; i++)    {	sendto_srom(command  | DT_CLK, addr);	tmp = getfrom_srom(addr);	sendto_srom(command, addr);	word = (word << 1) | ((tmp >> 3) & 0x01);    }    sendto_srom(command & 0x0000ff00, addr);    return word;}/*----------------------------------------------------------------------------*/static int srom_data_wr (u_int command, u_long addr, short val){    int i;    u_long longVal;    s32 tmp;    longVal = (u_long)(le16_to_cpu(val));    for (i=0; i<16; i++)    {	tmp = (longVal & 0x8000)>>13;	sendto_srom (tmp | command, addr);	sendto_srom (tmp | command  | DT_CLK, addr);	sendto_srom (tmp | command, addr);	longVal = longVal<<1;    }    sendto_srom(command & 0x0000ff00, addr);    sendto_srom(command, addr);    tmp = 100;    do    {	if ((getfrom_srom(dc_srom_iobase) & 0x8) == 0x8)	    break;	udelay(1000);    } while (--tmp);    if (tmp == 0)    {	printf("Write DEC21143 SRom timed out !\n");	return (-1);    }    return 0;}/*----------------------------------------------------------------------------*/static short srom_rd (u_long addr, u_char offset){    sendto_srom (SROM_RD | SROM_SR, addr);    srom_latch (SROM_RD | SROM_SR | DT_CS, addr);    srom_command_rd (SROM_RD | SROM_SR | DT_IN | DT_CS, addr);    srom_address (SROM_RD | SROM_SR | DT_CS, addr, offset);    return srom_data_rd (SROM_RD | SROM_SR | DT_CS, addr);}/*----------------------------------------------------------------------------*/static void srom_wr_enable (u_long addr){    int i;    sendto_srom (SROM_WR | SROM_SR, addr);    srom_latch (SROM_WR | SROM_SR | DT_CS, addr);    srom_latch (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);    srom_latch (SROM_WR | SROM_SR | DT_CS, addr);    srom_latch (SROM_WR | SROM_SR | DT_CS, addr);    for (i=0; i<6; i++)    {	srom_latch (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);    }}/*----------------------------------------------------------------------------*/static int srom_wr (u_long addr, u_char offset, short val){    srom_wr_enable (addr);    sendto_srom (SROM_WR | SROM_SR, addr);    srom_latch (SROM_WR | SROM_SR | DT_CS, addr);    srom_command_wr (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);    srom_address (SROM_WR | SROM_SR | DT_CS, addr, offset);    return srom_data_wr (SROM_WR | SROM_SR | DT_CS, addr, val);}/*----------------------------------------------------------------------------*//* * load data from the srom */int dc_srom_load (u_short *dest){    int offset;    short tmp;    /* get srom iobase from local network controller */    pci_read_config_dword(PCI_BDF(0,14,0), PCI_BASE_ADDRESS_1, &dc_srom_iobase);    dc_srom_iobase &= PCI_BASE_ADDRESS_MEM_MASK;    dc_srom_iobase  = pci_mem_to_phys(PCI_BDF(0,14,0), dc_srom_iobase);    dc_srom_iobase += 0x48;            /* io offset for srom access */    memset (dest, 0, 128);    for (offset=0; offset<64; offset++)    {	tmp = srom_rd (dc_srom_iobase, offset);	*dest++ = le16_to_cpu(tmp);    }    return (0);}/*----------------------------------------------------------------------------*//* * store data into the srom */int dc_srom_store (u_short *src){    int offset;    /* get srom iobase from local network controller */    pci_read_config_dword(PCI_BDF(0,14,0), PCI_BASE_ADDRESS_1, &dc_srom_iobase);    dc_srom_iobase &= PCI_BASE_ADDRESS_MEM_MASK;    dc_srom_iobase  = pci_mem_to_phys(PCI_BDF(0,14,0), dc_srom_iobase);    dc_srom_iobase += 0x48;            /* io offset for srom access */    for (offset=0; offset<64; offset++)    {	if (srom_wr (dc_srom_iobase, offset, *src) == -1)		return (-1);	src++;    }    return (0);}/*----------------------------------------------------------------------------*/