mirror of
https://github.com/fail0verflow/switch-coreboot.git
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more ppc
This commit is contained in:
Greg Watson
parent
777e522d45
commit
89f71da2cf
3 changed files with 280 additions and 0 deletions
2
src/mainboard/motorola/sandpoint/flash/Config
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2
src/mainboard/motorola/sandpoint/flash/Config
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object flash.o
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object amd800.o
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230
src/mainboard/motorola/sandpoint/flash/amd800.c
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230
src/mainboard/motorola/sandpoint/flash/amd800.c
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/* $Id$ */
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/* Copyright 2000 AG Electronics Ltd. */
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/* This code is distributed without warranty under the GPL v2 (see COPYING) */
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#include <types.h>
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#include <printk.h>
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#include <stdlib.h>
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#include "../flash.h"
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struct data_amd800
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{
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unsigned base;
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unsigned spacing;
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unsigned cs;
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const char *tag;
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};
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static const char *identify_amd (struct flash_device *flash_device);
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static int erase_flash_amd800 (void *data, unsigned offset, unsigned length);
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static int program_flash_amd800 (void *data, unsigned offset, const void *source,
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unsigned length);
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static u8 read_byte_amd800(void *data, unsigned offset);
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static flash_fn fn_amd800 = {
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identify_amd,
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0,
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0,
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erase_flash_amd800,
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program_flash_amd800,
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read_byte_amd800
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};
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const char *identify_amd (struct flash_device *flash_device)
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{
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struct data_amd800 *d800 = flash_device->data;
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if (!d800->tag)
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{
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volatile unsigned char *flash =
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(volatile unsigned char *) d800->base;
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unsigned char type,
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id;
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*(flash + 0xaaa * d800->spacing) = 0xaa;
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*(flash + 0x555 * d800->spacing) = 0x55;
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*(flash + 0xaaa * d800->spacing) = 0x90;
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type = *(flash + 2 * d800->spacing);
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id = *flash;
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*flash = 0xf0;
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if ((id == 1 || id == 0x20) && type == 0x5b)
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{
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d800->cs = 45;
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d800->tag = "Am29LV800BB";
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flash_device->base = d800->base;
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flash_device->size = 1024*1024;
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flash_device->erase_size = 64*1024;
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flash_device->store_size = 1;
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}
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else
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{
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printk_info("Unknown flash ID: 0x%02x 0x%02x\n", id, type);
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}
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}
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return d800->tag;
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}
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int erase_flash_amd800 (void *data, unsigned offset, unsigned length)
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{
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struct data_amd800 *d800 = data;
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volatile unsigned char *flash = (volatile unsigned char *) d800->base;
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volatile unsigned char *flash_aaa = flash + 0xaaa * d800->spacing;
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volatile unsigned char *flash_555 = flash + 0x555 * d800->spacing;
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int id;
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int cs = 9999;
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printk_info("Erase from 0x%08x to 0x%08x\n", offset, offset + length);
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*flash_aaa = 0xAA; // Chip Erase
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*flash_555 = 0x55;
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*flash_aaa = 0x80;
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*flash_aaa = 0xAA;
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*flash_555 = 0x55;
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*flash_aaa = 0x10;
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for (; cs > 0; cs--)
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{
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id = *(flash + 16);
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if (id & 0xA0) // DQ7 or DQ5 set: done or error
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break;
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printk_info("%4d\b\b\b\b", cs);
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}
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*flash_aaa = 0xF0; // In case of error
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printk_info("\b\b\b\b \b\b\b\b");
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if (cs == 0)
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{
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printk_info("Could not erase flash, timeout.\n");
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return -1;
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}
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else if ((id & 0x80) == 0)
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{
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printk_info("Could not erase flash, status=%02x.\n", id);
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return -1;
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}
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printk_info("Flash erased\n");
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return 0;
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}
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int init_flash_amd800 (char *tag, unsigned base, unsigned spacing)
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{
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struct data_amd800 *data = malloc (sizeof (struct data_amd800));
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if (data)
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{
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data->base = base;
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data->spacing = spacing;
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data->tag = 0;
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if (register_flash_device (&fn_amd800, tag, data) < 0)
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{
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free (data);
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return -1;
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}
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}
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else
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return -1;
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return 0;
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}
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int program_flash_amd800 (void *data, unsigned offset, const void *source,
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unsigned length)
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{
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struct data_amd800 *d800 = data;
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volatile unsigned char *flash = (volatile unsigned char *) d800->base;
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volatile unsigned char *flash_aaa = flash + 0xaaa * d800->spacing;
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volatile unsigned char *flash_555 = flash + 0x555 * d800->spacing;
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int id = 0;
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int cs;
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int errs = 0;
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volatile char *s;
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volatile char *d;
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printk_info("Program from 0x%08x to 0x%08x\n", offset, offset + length);
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printk_info("Data at %p\n", source);
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*flash_aaa = 0xAA; // Unlock Bypass
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*flash_555 = 0x55;
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*flash_aaa = 0x20;
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s = (unsigned char *) source;
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d = flash + offset * d800->spacing;
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cs = length;
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while (cs > 0 && !errs)
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{
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*flash = 0xA0; // Unlock Bypass Program
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*d = *s; // Program data
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while (1)
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{
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id = *d;
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if ((id & 0x80) == (*s & 0x80)) // DQ7 right? => program done
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break;
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else if (id & 0x20)
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{ // DQ5 set? => maybe errors
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id = *d;
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if ((id & 0x80) != (*s & 0x80))
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{
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errs++;
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break;
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}
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}
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}
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// PRINT("Set %08lx = %02x\n", d, *d);
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s += 1;
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d += d800->spacing;
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cs--;
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}
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*flash = 0x90; // Unlock Bypass Program Reset
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*flash = 0x00;
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*flash = 0xF0;
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if (errs != 0)
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{
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printk_info("FAIL: Status=%02x Address=%p.\n", id, d - d800->spacing);
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return -1;
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}
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printk_info("OK.\n");
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// Step 4: Verify the flash.
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printk_info(" Verifying flash : ...");
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errs = 0;
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s = (unsigned char *) source;
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d = flash + offset * d800->spacing;
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for (cs = 0; cs < length; cs++)
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{
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if (*s != *d)
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{
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if (errs == 0)
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printk_info("ERROR: Addr: %08p, PCI: %02x Lcl: %02x.\n",
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s, *s, *d);
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errs++;
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}
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s += 1;
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d += d800->spacing;
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}
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if (errs == 0)
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printk_info("OK.\n");
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else
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{
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printk_info(" FAIL: %d errors.\n", errs);
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return -1;
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}
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return 0;
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}
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u8 read_byte_amd800 (void *data, unsigned offset)
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{
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struct data_amd800 *d800 = data;
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volatile unsigned char *flash = (volatile unsigned char *) d800->base;
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return *(flash + offset * d800->spacing);
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}
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48
src/mainboard/motorola/sandpoint/flash/flash.c
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48
src/mainboard/motorola/sandpoint/flash/flash.c
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@ -0,0 +1,48 @@
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/* $Id$ */
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/* Copyright 2000 AG Electronics Ltd. */
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/* This code is distributed without warranty under the GPL v2 (see COPYING) */
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#include <types.h>
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#include <string.h>
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#include <printk.h>
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#include <stdlib.h>
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#include "../flash.h"
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static flash_device *first_flash = 0;
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int register_flash_device (const flash_fn * fn, char *tag, void *data)
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{
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flash_device *device = malloc (sizeof (flash_device));
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if (device)
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{
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const char *result;
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device->fn = fn;
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device->tag = tag;
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device->data = data;
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if ((result = fn->identify(device)) != 0)
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{
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printk_info("Registered flash %s\n", result);
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device->next = first_flash;
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first_flash = device;
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}
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return result ? 0 : -1;
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}
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return -1;
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}
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flash_device *find_flash_device(const char *name)
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{
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int len = strlen(name);
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if (first_flash)
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{
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flash_device *flash;
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for (flash = first_flash; flash; flash = flash->next)
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if (strlen(flash->tag) == len && memcmp(name, flash->tag, len) == 0)
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return flash;
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}
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printk_info ("No flash %s registered\n", name);
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return 0;
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}
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