/* * Copyright 1998-2001 by Donald Becker. * This software may be used and distributed according to the terms of * the GNU General Public License (GPL), incorporated herein by reference. * Contact the author for use under other terms. * * This program must be compiled with "-O"! * See the bottom of this file for the suggested compile-command. * * The author may be reached as becker@scyld.com, or C/O * Scyld Computing Corporation * 410 Severn Ave., Suite 210 * Annapolis MD 21403 * * Common-sense licensing statement: Using any portion of this program in * your own program means that you must give credit to the original author * and release the resulting code under the GPL. */ /* avoid unnecessary memcpy function */ #define _PPC_STRING_H_ #include <common.h> #include <exports.h> static int reset_eeprom(unsigned long ioaddr, unsigned char *hwaddr); int eepro100_eeprom(int argc, char * const argv[]) { int ret = 0; unsigned char hwaddr1[6] = { 0x00, 0x00, 0x02, 0x03, 0x04, 0x05 }; unsigned char hwaddr2[6] = { 0x00, 0x00, 0x02, 0x03, 0x04, 0x06 }; app_startup(argv); #if defined(CONFIG_OXC) ret |= reset_eeprom(0x80000000, hwaddr1); ret |= reset_eeprom(0x81000000, hwaddr2); #endif return ret; } /* Default EEPROM for i82559 */ static unsigned short default_eeprom[64] = { 0x0100, 0x0302, 0x0504, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0x40c0, 0x0000, 0x0000, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff }; static unsigned short eeprom[256]; static int eeprom_size = 64; static int eeprom_addr_size = 6; static int debug = 0; static inline unsigned short swap16(unsigned short x) { return (((x & 0xff) << 8) | ((x & 0xff00) >> 8)); } static inline void outw(short data, long addr) { *(volatile short *)(addr) = swap16(data); } static inline short inw(long addr) { return swap16(*(volatile short *)(addr)); } void *memcpy(void *dst, const void *src, unsigned int len) { char *ret = dst; while (len-- > 0) { *ret++ = *((char *)src); src++; } return (void *)ret; } /* The EEPROM commands include the alway-set leading bit. */ #define EE_WRITE_CMD (5) #define EE_READ_CMD (6) #define EE_ERASE_CMD (7) /* Serial EEPROM section. */ #define EE_SHIFT_CLK 0x01 /* EEPROM shift clock. */ #define EE_CS 0x02 /* EEPROM chip select. */ #define EE_DATA_WRITE 0x04 /* EEPROM chip data in. */ #define EE_DATA_READ 0x08 /* EEPROM chip data out. */ #define EE_ENB (0x4800 | EE_CS) #define EE_WRITE_0 0x4802 #define EE_WRITE_1 0x4806 #define EE_OFFSET 14 /* Delay between EEPROM clock transitions. */ #define eeprom_delay(ee_addr) inw(ee_addr) /* Wait for the EEPROM to finish the previous operation. */ static int eeprom_busy_poll(long ee_ioaddr) { int i; outw(EE_ENB, ee_ioaddr); for (i = 0; i < 10000; i++) /* Typical 2000 ticks */ if (inw(ee_ioaddr) & EE_DATA_READ) break; return i; } /* This executes a generic EEPROM command, typically a write or write enable. It returns the data output from the EEPROM, and thus may also be used for reads. */ static int do_eeprom_cmd(long ioaddr, int cmd, int cmd_len) { unsigned retval = 0; long ee_addr = ioaddr + EE_OFFSET; if (debug > 1) printf(" EEPROM op 0x%x: ", cmd); outw(EE_ENB | EE_SHIFT_CLK, ee_addr); /* Shift the command bits out. */ do { short dataval = (cmd & (1 << cmd_len)) ? EE_WRITE_1 : EE_WRITE_0; outw(dataval, ee_addr); eeprom_delay(ee_addr); if (debug > 2) printf("%X", inw(ee_addr) & 15); outw(dataval | EE_SHIFT_CLK, ee_addr); eeprom_delay(ee_addr); retval = (retval << 1) | ((inw(ee_addr) & EE_DATA_READ) ? 1 : 0); } while (--cmd_len >= 0); #if 0 outw(EE_ENB, ee_addr); #endif /* Terminate the EEPROM access. */ outw(EE_ENB & ~EE_CS, ee_addr); if (debug > 1) printf(" EEPROM result is 0x%5.5x.\n", retval); return retval; } static int read_eeprom(long ioaddr, int location, int addr_len) { return do_eeprom_cmd(ioaddr, ((EE_READ_CMD << addr_len) | location) << 16 , 3 + addr_len + 16) & 0xffff; } static void write_eeprom(long ioaddr, int index, int value, int addr_len) { long ee_ioaddr = ioaddr + EE_OFFSET; int i; /* Poll for previous op finished. */ eeprom_busy_poll(ee_ioaddr); /* Typical 0 ticks */ /* Enable programming modes. */ do_eeprom_cmd(ioaddr, (0x4f << (addr_len-4)), 3 + addr_len); /* Do the actual write. */ do_eeprom_cmd(ioaddr, (((EE_WRITE_CMD<<addr_len) | index)<<16) | (value & 0xffff), 3 + addr_len + 16); /* Poll for write finished. */ i = eeprom_busy_poll(ee_ioaddr); /* Typical 2000 ticks */ if (debug) printf(" Write finished after %d ticks.\n", i); /* Disable programming. This command is not instantaneous, so we check for busy before the next op. */ do_eeprom_cmd(ioaddr, (0x40 << (addr_len-4)), 3 + addr_len); eeprom_busy_poll(ee_ioaddr); } static int reset_eeprom(unsigned long ioaddr, unsigned char *hwaddr) { unsigned short checksum = 0; int size_test; int i; printf("Resetting i82559 EEPROM @ 0x%08lX ... ", ioaddr); size_test = do_eeprom_cmd(ioaddr, (EE_READ_CMD << 8) << 16, 27); eeprom_addr_size = (size_test & 0xffe0000) == 0xffe0000 ? 8 : 6; eeprom_size = 1 << eeprom_addr_size; memcpy(eeprom, default_eeprom, sizeof default_eeprom); for (i = 0; i < 3; i++) eeprom[i] = (hwaddr[i*2+1]<<8) + hwaddr[i*2]; /* Recalculate the checksum. */ for (i = 0; i < eeprom_size - 1; i++) checksum += eeprom[i]; eeprom[i] = 0xBABA - checksum; for (i = 0; i < eeprom_size; i++) write_eeprom(ioaddr, i, eeprom[i], eeprom_addr_size); for (i = 0; i < eeprom_size; i++) if (read_eeprom(ioaddr, i, eeprom_addr_size) != eeprom[i]) { printf("failed\n"); return 1; } printf("done\n"); return 0; }