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![Wolfgang Denk](/assets/img/avatar_default.png)
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
928 lines
21 KiB
C
928 lines
21 KiB
C
/*
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* (C) Copyright 2001
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* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
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* Based on code by:
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/ppc4xx.h>
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#include <asm/processor.h>
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#include <watchdog.h>
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/* info for FLASH chips */
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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/*
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* Functions
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*/
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static ulong flash_get_size(vu_long *addr, flash_info_t *info);
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static int write_word8(flash_info_t *info, ulong dest, ulong data);
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static int write_word32(flash_info_t *info, ulong dest, ulong data);
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static void flash_get_offsets(ulong base, flash_info_t *info);
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unsigned long flash_init(void)
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{
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int i;
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unsigned long size_b0, base_b0;
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unsigned long size_b1;
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/* Init: no FLASHes known */
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
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flash_info[i].flash_id = FLASH_UNKNOWN;
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/* Get Size of Boot and Main Flashes */
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size_b0 = flash_get_size((vu_long *) FLASH_BASE0_PRELIM,
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&flash_info[0]);
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if (flash_info[0].flash_id == FLASH_UNKNOWN) {
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printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
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size_b0, size_b0 << 20);
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return 0;
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}
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size_b1 =
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flash_get_size((vu_long *) FLASH_BASE1_PRELIM,
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&flash_info[1]);
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if (flash_info[1].flash_id == FLASH_UNKNOWN) {
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printf("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n",
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size_b1, size_b1 << 20);
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return 0;
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}
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/* Calculate base addresses */
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base_b0 = -size_b0;
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/* Setup offsets for Boot Flash */
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flash_get_offsets(base_b0, &flash_info[0]);
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/* Protect board level data */
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(void) flash_protect(FLAG_PROTECT_SET,
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base_b0,
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flash_info[0].start[1] - 1, &flash_info[0]);
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/* Monitor protection ON by default */
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(void) flash_protect(FLAG_PROTECT_SET,
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base_b0 + size_b0 - monitor_flash_len,
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base_b0 + size_b0 - 1, &flash_info[0]);
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/* Protect the FPGA image */
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(void) flash_protect(FLAG_PROTECT_SET,
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FLASH_BASE1_PRELIM,
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FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN -
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1, &flash_info[1]);
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/* Protect the default boot image */
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(void) flash_protect(FLAG_PROTECT_SET,
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FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN,
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FLASH_BASE1_PRELIM + CONFIG_SYS_FPGA_IMAGE_LEN +
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0x600000 - 1, &flash_info[1]);
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/* Setup offsets for Main Flash */
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flash_get_offsets(FLASH_BASE1_PRELIM, &flash_info[1]);
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return size_b0 + size_b1;
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}
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static void flash_get_offsets(ulong base, flash_info_t *info)
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{
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int i;
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/* set up sector start address table - FOR BOOT ROM ONLY!!! */
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if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = base + (i * 0x00010000);
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}
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} /* end flash_get_offsets() */
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void flash_print_info(flash_info_t *info)
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{
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int i;
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int k;
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int size;
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int erased;
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volatile unsigned long *flash;
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if (info->flash_id == FLASH_UNKNOWN) {
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printf("missing or unknown FLASH type\n");
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return;
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}
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switch (info->flash_id & FLASH_VENDMASK) {
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case FLASH_MAN_AMD:
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printf("1 x AMD ");
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break;
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case FLASH_MAN_STM:
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printf("1 x STM ");
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break;
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case FLASH_MAN_INTEL:
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printf("2 x Intel ");
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break;
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default:
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printf("Unknown Vendor ");
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}
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_AM040:
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if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
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printf("AM29LV040 (4096 Kbit, uniform sector size)\n");
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else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM)
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printf("M29W040B (4096 Kbit, uniform block size)\n");
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else
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printf("UNKNOWN 29x040x (4096 Kbit, uniform sector size)\n");
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break;
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case FLASH_28F320J3A:
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printf("28F320J3A (32 Mbit = 128K x 32)\n");
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break;
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case FLASH_28F640J3A:
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printf("28F640J3A (64 Mbit = 128K x 64)\n");
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break;
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case FLASH_28F128J3A:
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printf("28F128J3A (128 Mbit = 128K x 128)\n");
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break;
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default:
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printf("Unknown Chip Type\n");
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}
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if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM) {
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printf(" Size: %ld KB in %d Blocks\n",
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info->size >> 10, info->sector_count);
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} else {
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printf(" Size: %ld KB in %d Sectors\n",
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info->size >> 10, info->sector_count);
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}
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printf(" Sector Start Addresses:");
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for (i = 0; i < info->sector_count; ++i) {
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/*
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* Check if whole sector is erased
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*/
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if (i != (info->sector_count - 1))
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size = info->start[i + 1] - info->start[i];
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else
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size = info->start[0] + info->size - info->start[i];
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erased = 1;
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flash = (volatile unsigned long *) info->start[i];
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size = size >> 2; /* divide by 4 for longword access */
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for (k = 0; k < size; k++) {
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if (*flash++ != 0xffffffff) {
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erased = 0;
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break;
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}
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}
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if ((i % 5) == 0)
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printf("\n ");
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printf(" %08lX%s%s",
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info->start[i],
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erased ? " E" : " ",
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info->protect[i] ? "RO " : " ");
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}
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printf("\n");
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} /* end flash_print_info() */
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/*
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* The following code cannot be run from FLASH!
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*/
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static ulong flash_get_size(vu_long *addr, flash_info_t *info)
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{
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short i;
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ulong base = (ulong) addr;
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/* Setup default type */
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info->flash_id = FLASH_UNKNOWN;
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info->sector_count = 0;
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info->size = 0;
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/* Test for Boot Flash */
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if (base == FLASH_BASE0_PRELIM) {
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unsigned char value;
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volatile unsigned char *addr2 = (unsigned char *) addr;
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/* Write auto select command: read Manufacturer ID */
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*(addr2 + 0x555) = 0xaa;
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*(addr2 + 0x2aa) = 0x55;
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*(addr2 + 0x555) = 0x90;
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/* Manufacture ID */
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value = *addr2;
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switch (value) {
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case (unsigned char) AMD_MANUFACT:
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info->flash_id = FLASH_MAN_AMD;
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break;
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case (unsigned char) STM_MANUFACT:
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info->flash_id = FLASH_MAN_STM;
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break;
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default:
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*addr2 = 0xf0; /* no or unknown flash */
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return 0;
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}
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/* Device ID */
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value = *(addr2 + 1);
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switch (value) {
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case (unsigned char) AMD_ID_LV040B:
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case (unsigned char) STM_ID_29W040B:
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info->flash_id += FLASH_AM040;
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info->sector_count = 8;
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info->size = 0x00080000;
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break; /* => 512Kb */
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default:
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*addr2 = 0xf0; /* => no or unknown flash */
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return 0;
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}
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} else { /* MAIN Flash */
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unsigned long value;
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volatile unsigned long *addr2 = (unsigned long *) addr;
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/* Write auto select command: read Manufacturer ID */
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*addr2 = 0x90909090;
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/* Manufacture ID */
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value = *addr2;
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switch (value) {
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case (unsigned long) INTEL_MANUFACT:
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info->flash_id = FLASH_MAN_INTEL;
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break;
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default:
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*addr2 = 0xff; /* no or unknown flash */
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return 0;
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}
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/* Device ID - This shit is interleaved... */
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value = *(addr2 + 1);
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switch (value) {
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case (unsigned long) INTEL_ID_28F320J3A:
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info->flash_id += FLASH_28F320J3A;
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info->sector_count = 32;
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info->size = 0x00400000 * 2;
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break; /* => 2 X 4 MB */
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case (unsigned long) INTEL_ID_28F640J3A:
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info->flash_id += FLASH_28F640J3A;
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info->sector_count = 64;
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info->size = 0x00800000 * 2;
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break; /* => 2 X 8 MB */
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case (unsigned long) INTEL_ID_28F128J3A:
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info->flash_id += FLASH_28F128J3A;
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info->sector_count = 128;
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info->size = 0x01000000 * 2;
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break; /* => 2 X 16 MB */
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default:
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*addr2 = 0xff; /* => no or unknown flash */
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}
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}
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/* Make sure we don't exceed CONFIG_SYS_MAX_FLASH_SECT */
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if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
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printf("** ERROR: sector count %d > max (%d) **\n",
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info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
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info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
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}
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/* set up sector start address table */
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switch (info->flash_id & FLASH_TYPEMASK) {
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case FLASH_AM040:
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = base + (i * 0x00010000);
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break;
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case FLASH_28F320J3A:
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case FLASH_28F640J3A:
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case FLASH_28F128J3A:
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for (i = 0; i < info->sector_count; i++)
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info->start[i] = base +
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(i * 0x00020000 * 2); /* 2 Banks */
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break;
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}
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/* Test for Boot Flash */
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if (base == FLASH_BASE0_PRELIM) {
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volatile unsigned char *addr2;
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/* check for protected sectors */
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for (i = 0; i < info->sector_count; i++) {
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/*
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* read sector protection at sector address,
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* (AX .. A0) = 0x02
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* D0 = 1 if protected
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*/
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addr2 = (volatile unsigned char *) (info->start[i]);
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info->protect[i] = *(addr2 + 2) & 1;
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}
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/* Restore read mode */
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*(unsigned char *) base = 0xF0; /* Reset NORMAL Flash */
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} else { /* Main Flash */
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volatile unsigned long *addr2;
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/* check for protected sectors */
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for (i = 0; i < info->sector_count; i++) {
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/*
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* read sector protection at sector address,
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* (AX .. A0) = 0x02
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* D0 = 1 if protected
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*/
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addr2 = (volatile unsigned long *) (info->start[i]);
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info->protect[i] = *(addr2 + 2) & 0x1;
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}
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/* Restore read mode */
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*(unsigned long *) base = 0xFFFFFFFF; /* Reset Flash */
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}
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return info->size;
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} /* end flash_get_size() */
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static int wait_for_DQ7(ulong addr, uchar cmp_val, ulong tout)
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{
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int i;
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volatile uchar *vaddr = (uchar *) addr;
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/* Loop X times */
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for (i = 1; i <= (100 * tout); i++) { /* Wait up to tout ms */
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udelay(10);
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/* Pause 10 us */
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/* Check for completion */
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if ((vaddr[0] & 0x80) == (cmp_val & 0x80))
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return 0;
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/* KEEP THE LUSER HAPPY - Print a dot every 1.1 seconds */
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if (!(i % 110000))
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putc('.');
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/* Kick the dog if needed */
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WATCHDOG_RESET();
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}
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return 1;
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} /* wait_for_DQ7() */
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static int flash_erase8(flash_info_t *info, int s_first, int s_last)
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{
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int tcode, rcode = 0;
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volatile uchar *addr = (uchar *) (info->start[0]);
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volatile uchar *sector_addr;
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int flag, prot, sect;
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/* Validate arguments */
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if ((s_first < 0) || (s_first > s_last)) {
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if (info->flash_id == FLASH_UNKNOWN)
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printf("- missing\n");
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else
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printf("- no sectors to erase\n");
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return 1;
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}
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/* Check for KNOWN flash type */
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if (info->flash_id == FLASH_UNKNOWN) {
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printf("Can't erase unknown flash type - aborted\n");
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return 1;
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}
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/* Check for protected sectors */
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prot = 0;
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for (sect = s_first; sect <= s_last; ++sect) {
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if (info->protect[sect])
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prot++;
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}
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if (prot) {
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printf("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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printf("\n");
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}
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect <= s_last; sect++) {
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if (info->protect[sect] == 0) { /* not protected */
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sector_addr = (uchar *) (info->start[sect]);
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if ((info->flash_id & FLASH_VENDMASK) ==
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FLASH_MAN_STM)
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printf("Erasing block %p\n", sector_addr);
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else
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printf("Erasing sector %p\n", sector_addr);
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/* Disable interrupts which might cause timeout */
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flag = disable_interrupts();
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*(addr + 0x555) = (uchar) 0xAA;
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*(addr + 0x2aa) = (uchar) 0x55;
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*(addr + 0x555) = (uchar) 0x80;
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*(addr + 0x555) = (uchar) 0xAA;
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*(addr + 0x2aa) = (uchar) 0x55;
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*sector_addr = (uchar) 0x30; /* sector erase */
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/*
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* Wait for each sector to complete, it's more
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* reliable. According to AMD Spec, you must
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* issue all erase commands within a specified
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* timeout. This has been seen to fail, especially
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* if printf()s are included (for debug)!!
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* Takes up to 6 seconds.
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*/
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tcode = wait_for_DQ7((ulong) sector_addr, 0x80, 6000);
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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/* Make sure we didn't timeout */
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if (tcode) {
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printf("Timeout\n");
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rcode = 1;
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}
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}
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}
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/* wait at least 80us - let's wait 1 ms */
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udelay(1000);
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/* reset to read mode */
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addr = (uchar *) info->start[0];
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*addr = (uchar) 0xF0; /* reset bank */
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printf(" done\n");
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return rcode;
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} /* end flash_erase8() */
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static int flash_erase32(flash_info_t *info, int s_first, int s_last)
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{
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int flag, sect;
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ulong start, now, last;
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int prot = 0;
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/* Validate arguments */
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if ((s_first < 0) || (s_first > s_last)) {
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if (info->flash_id == FLASH_UNKNOWN)
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printf("- missing\n");
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else
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printf("- no sectors to erase\n");
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return 1;
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}
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/* Check for KNOWN flash type */
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if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
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printf("Can erase only Intel flash types - aborted\n");
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return 1;
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}
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/* Check for protected sectors */
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for (sect = s_first; sect <= s_last; ++sect) {
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if (info->protect[sect])
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prot++;
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}
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if (prot) {
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printf("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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printf("\n");
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}
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start = get_timer(0);
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last = start;
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/* Start erase on unprotected sectors */
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for (sect = s_first; sect <= s_last; sect++) {
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WATCHDOG_RESET();
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if (info->protect[sect] == 0) { /* not protected */
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vu_long *addr = (vu_long *) (info->start[sect]);
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unsigned long status;
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/* Disable interrupts which might cause a timeout */
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flag = disable_interrupts();
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*addr = 0x00500050; /* clear status register */
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*addr = 0x00200020; /* erase setup */
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*addr = 0x00D000D0; /* erase confirm */
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/* re-enable interrupts if necessary */
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if (flag)
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enable_interrupts();
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/* Wait at least 80us - let's wait 1 ms */
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udelay(1000);
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while (((status = *addr) & 0x00800080) != 0x00800080) {
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now = get_timer(start);
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if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
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printf("Timeout\n");
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/* suspend erase */
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|
*addr = 0x00B000B0;
|
|
/* reset to read mode */
|
|
*addr = 0x00FF00FF;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* show that we're waiting
|
|
* every second (?)
|
|
*/
|
|
if ((now - last) > 990) {
|
|
putc('.');
|
|
last = now;
|
|
}
|
|
}
|
|
*addr = 0x00FF00FF; /* reset to read mode */
|
|
}
|
|
}
|
|
printf(" done\n");
|
|
return 0;
|
|
}
|
|
|
|
int flash_erase(flash_info_t *info, int s_first, int s_last)
|
|
{
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040)
|
|
return flash_erase8(info, s_first, s_last);
|
|
else
|
|
return flash_erase32(info, s_first, s_last);
|
|
}
|
|
|
|
/*
|
|
* Copy memory to flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
static int write_buff8(flash_info_t *info, uchar *src, ulong addr,
|
|
ulong cnt)
|
|
{
|
|
ulong cp, wp, data;
|
|
ulong start;
|
|
int i, l, rc;
|
|
|
|
start = get_timer(0);
|
|
|
|
wp = (addr & ~3); /* get lower word
|
|
aligned address */
|
|
|
|
/*
|
|
* handle unaligned start bytes
|
|
*/
|
|
l = addr - wp;
|
|
if (l != 0) {
|
|
data = 0;
|
|
for (i = 0, cp = wp; i < l; ++i, ++cp)
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
|
|
for (; i < 4 && cnt > 0; ++i) {
|
|
data = (data << 8) | *src++;
|
|
--cnt;
|
|
++cp;
|
|
}
|
|
|
|
for (; cnt == 0 && i < 4; ++i, ++cp)
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
|
|
rc = write_word8(info, wp, data);
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
wp += 4;
|
|
}
|
|
|
|
/*
|
|
* handle word aligned part
|
|
*/
|
|
while (cnt >= 4) {
|
|
data = 0;
|
|
for (i = 0; i < 4; ++i)
|
|
data = (data << 8) | *src++;
|
|
|
|
rc = write_word8(info, wp, data);
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
wp += 4;
|
|
cnt -= 4;
|
|
if (get_timer(start) > 1000) { /* every second */
|
|
WATCHDOG_RESET();
|
|
putc('.');
|
|
start = get_timer(0);
|
|
}
|
|
}
|
|
|
|
if (cnt == 0)
|
|
return 0;
|
|
|
|
/*
|
|
* handle unaligned tail bytes
|
|
*/
|
|
data = 0;
|
|
for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
|
|
data = (data << 8) | *src++;
|
|
--cnt;
|
|
}
|
|
|
|
for (; i < 4; ++i, ++cp)
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
|
|
return write_word8(info, wp, data);
|
|
}
|
|
|
|
#define FLASH_WIDTH 4 /* flash bus width in bytes */
|
|
static int write_buff32(flash_info_t *info, uchar *src, ulong addr,
|
|
ulong cnt)
|
|
{
|
|
ulong cp, wp, data;
|
|
int i, l, rc;
|
|
ulong start;
|
|
|
|
start = get_timer(0);
|
|
|
|
if (info->flash_id == FLASH_UNKNOWN)
|
|
return 4;
|
|
|
|
/* get lower FLASH_WIDTH aligned address */
|
|
wp = (addr & ~(FLASH_WIDTH - 1));
|
|
|
|
/*
|
|
* handle unaligned start bytes
|
|
*/
|
|
if ((l = addr - wp) != 0) {
|
|
data = 0;
|
|
for (i = 0, cp = wp; i < l; ++i, ++cp)
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
|
|
for (; i < FLASH_WIDTH && cnt > 0; ++i) {
|
|
data = (data << 8) | *src++;
|
|
--cnt;
|
|
++cp;
|
|
}
|
|
|
|
for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp)
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
|
|
rc = write_word32(info, wp, data);
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
wp += FLASH_WIDTH;
|
|
}
|
|
|
|
/*
|
|
* handle FLASH_WIDTH aligned part
|
|
*/
|
|
while (cnt >= FLASH_WIDTH) {
|
|
data = 0;
|
|
for (i = 0; i < FLASH_WIDTH; ++i)
|
|
data = (data << 8) | *src++;
|
|
|
|
rc = write_word32(info, wp, data);
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
wp += FLASH_WIDTH;
|
|
cnt -= FLASH_WIDTH;
|
|
if (get_timer(start) > 990) { /* every second */
|
|
putc('.');
|
|
start = get_timer(0);
|
|
}
|
|
}
|
|
|
|
if (cnt == 0)
|
|
return 0;
|
|
|
|
/*
|
|
* handle unaligned tail bytes
|
|
*/
|
|
data = 0;
|
|
for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
|
|
data = (data << 8) | *src++;
|
|
--cnt;
|
|
}
|
|
|
|
for (; i < FLASH_WIDTH; ++i, ++cp)
|
|
data = (data << 8) | (*(uchar *) cp);
|
|
|
|
return write_word32(info, wp, data);
|
|
}
|
|
|
|
int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
|
|
{
|
|
int retval;
|
|
|
|
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040)
|
|
retval = write_buff8(info, src, addr, cnt);
|
|
else
|
|
retval = write_buff32(info, src, addr, cnt);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* Write a word to Flash, returns:
|
|
* 0 - OK
|
|
* 1 - write timeout
|
|
* 2 - Flash not erased
|
|
*/
|
|
|
|
static int write_word8(flash_info_t *info, ulong dest, ulong data)
|
|
{
|
|
volatile uchar *addr2 = (uchar *) (info->start[0]);
|
|
volatile uchar *dest2 = (uchar *) dest;
|
|
volatile uchar *data2 = (uchar *) &data;
|
|
int flag;
|
|
int i, tcode, rcode = 0;
|
|
|
|
/* Check if Flash is (sufficently) erased */
|
|
if ((*((volatile uchar *)dest) & (uchar)data) != (uchar)data)
|
|
return 2;
|
|
|
|
for (i = 0; i < (4 / sizeof(uchar)); i++) {
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
*(addr2 + 0x555) = (uchar) 0xAA;
|
|
*(addr2 + 0x2aa) = (uchar) 0x55;
|
|
*(addr2 + 0x555) = (uchar) 0xA0;
|
|
|
|
dest2[i] = data2[i];
|
|
|
|
/* Wait for write to complete, up to 1ms */
|
|
tcode = wait_for_DQ7((ulong) &dest2[i], data2[i], 1);
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
/* Make sure we didn't timeout */
|
|
if (tcode)
|
|
rcode = 1;
|
|
}
|
|
|
|
return rcode;
|
|
}
|
|
|
|
static int write_word32(flash_info_t *info, ulong dest, ulong data)
|
|
{
|
|
vu_long *addr = (vu_long *) dest;
|
|
ulong status;
|
|
ulong start;
|
|
int flag;
|
|
|
|
/* Check if Flash is (sufficiently) erased */
|
|
if ((*addr & data) != data)
|
|
return 2;
|
|
|
|
/* Disable interrupts which might cause a timeout here */
|
|
flag = disable_interrupts();
|
|
|
|
*addr = 0x00400040; /* write setup */
|
|
*addr = data;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
start = get_timer(0);
|
|
|
|
while (((status = *addr) & 0x00800080) != 0x00800080) {
|
|
WATCHDOG_RESET();
|
|
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
|
|
*addr = 0x00FF00FF; /* restore read mode */
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
*addr = 0x00FF00FF; /* restore read mode */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int _flash_protect(flash_info_t *info, long sector)
|
|
{
|
|
int i;
|
|
int flag;
|
|
ulong status;
|
|
int rcode = 0;
|
|
volatile long *addr = (long *)sector;
|
|
|
|
switch (info->flash_id & FLASH_TYPEMASK) {
|
|
case FLASH_28F320J3A:
|
|
case FLASH_28F640J3A:
|
|
case FLASH_28F128J3A:
|
|
/* Disable interrupts which might cause Flash to timeout */
|
|
flag = disable_interrupts();
|
|
|
|
/* Issue command */
|
|
*addr = 0x00500050L; /* Clear the status register */
|
|
*addr = 0x00600060L; /* Set lock bit setup */
|
|
*addr = 0x00010001L; /* Set lock bit confirm */
|
|
|
|
/* Wait for command completion */
|
|
for (i = 0; i < 10; i++) { /* 75us timeout, wait 100us */
|
|
udelay(10);
|
|
if ((*addr & 0x00800080L) == 0x00800080L)
|
|
break;
|
|
}
|
|
|
|
/* Not successful? */
|
|
status = *addr;
|
|
if (status != 0x00800080L) {
|
|
printf("Protect %x sector failed: %x\n",
|
|
(uint) sector, (uint) status);
|
|
rcode = 1;
|
|
}
|
|
|
|
/* Restore read mode */
|
|
*addr = 0x00ff00ffL;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
break;
|
|
case FLASH_AM040: /* No soft sector protection */
|
|
break;
|
|
}
|
|
|
|
/* Turn protection on for this sector */
|
|
for (i = 0; i < info->sector_count; i++) {
|
|
if (info->start[i] == sector) {
|
|
info->protect[i] = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rcode;
|
|
}
|
|
|
|
static int _flash_unprotect(flash_info_t *info, long sector)
|
|
{
|
|
int i;
|
|
int flag;
|
|
ulong status;
|
|
int rcode = 0;
|
|
volatile long *addr = (long *) sector;
|
|
|
|
switch (info->flash_id & FLASH_TYPEMASK) {
|
|
case FLASH_28F320J3A:
|
|
case FLASH_28F640J3A:
|
|
case FLASH_28F128J3A:
|
|
/* Disable interrupts which might cause Flash to timeout */
|
|
flag = disable_interrupts();
|
|
|
|
*addr = 0x00500050L; /* Clear the status register */
|
|
*addr = 0x00600060L; /* Clear lock bit setup */
|
|
*addr = 0x00D000D0L; /* Clear lock bit confirm */
|
|
|
|
/* Wait for command completion */
|
|
for (i = 0; i < 80; i++) { /* 700ms timeout, wait 800 */
|
|
udelay(10000); /* Delay 10ms */
|
|
if ((*addr & 0x00800080L) == 0x00800080L)
|
|
break;
|
|
}
|
|
|
|
/* Not successful? */
|
|
status = *addr;
|
|
if (status != 0x00800080L) {
|
|
printf("Un-protect %x sector failed: %x\n",
|
|
(uint) sector, (uint) status);
|
|
*addr = 0x00ff00ffL;
|
|
rcode = 1;
|
|
}
|
|
|
|
/* restore read mode */
|
|
*addr = 0x00ff00ffL;
|
|
|
|
/* re-enable interrupts if necessary */
|
|
if (flag)
|
|
enable_interrupts();
|
|
|
|
break;
|
|
case FLASH_AM040: /* No soft sector protection */
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Fix Intel's little red wagon. Reprotect
|
|
* sectors that were protected before we undid
|
|
* protection on a specific sector.
|
|
*/
|
|
for (i = 0; i < info->sector_count; i++) {
|
|
if (info->start[i] != sector) {
|
|
if (info->protect[i]) {
|
|
if (_flash_protect(info, info->start[i]))
|
|
rcode = 1;
|
|
}
|
|
} else /* Turn protection off for this sector */
|
|
info->protect[i] = 0;
|
|
}
|
|
|
|
return rcode;
|
|
}
|
|
|
|
int flash_real_protect(flash_info_t *info, long sector, int prot)
|
|
{
|
|
int rcode;
|
|
|
|
if (prot)
|
|
rcode = _flash_protect(info, info->start[sector]);
|
|
else
|
|
rcode = _flash_unprotect(info, info->start[sector]);
|
|
|
|
return rcode;
|
|
}
|