+++ /dev/null
-/*
- * 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;
-}
projects / u-boot.git / commitdiff
