/*
- * sst28sf040.c: driver for SST28SF040C flash models.
+ * This file is part of the flashrom project.
*
+ * Copyright (C) 2000 Silicon Integrated System Corporation
*
- * Copyright 2000 Silicon Integrated System Corporation
- * Copyright 2005 coresystems GmbH <stepan@openbios.org>
+ * 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *
- * Reference:
- * 8 MEgabit (1024K x 8) SHARP LHF00L04, data sheet
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
-#include <stdint.h>
+#include <stdlib.h>
#include "flash.h"
-#include "debug.h"
-
-#define AUTO_PG_ERASE1 0x20
-#define AUTO_PG_ERASE2 0xD0
-#define AUTO_PGRM 0x10
-#define CHIP_ERASE 0x30
-#define RESET 0xFF
-#define READ_ID 0x90
-
-static __inline__ void protect_lhf00l04(volatile uint8_t *bios)
+// I need that Berkeley bit-map printer
+void print_lhf00l04_status(uint8_t status)
{
- /* ask compiler not to optimize this */
-// volatile uint8_t tmp;
-
+ printf("%s", status & 0x80 ? "Ready:" : "Busy:");
+ printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
+ printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
+ printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
+ printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
+ printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
+ printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
}
-static __inline__ void unprotect_lhf00l04(volatile uint8_t *bios)
+int probe_lhf00l04(struct flashchip *flash)
{
- /* ask compiler not to optimize this */
-// volatile uint8_t tmp;
-}
+ volatile uint8_t *bios = flash->virtual_memory;
+ uint8_t id1, id2;
-static __inline__ int erase_sector_lhf00l04(volatile uint8_t *bios,
- unsigned long address)
-{
+#if 0
+ /* Enter ID mode */
+ *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+ *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+ *(volatile uint8_t *)(bios + 0x5555) = 0x90;
+#endif
- return (0);
-}
+ *bios = 0xff;
+ myusec_delay(10);
+ *bios = 0x90;
+ myusec_delay(10);
-static __inline__ int write_sector_lhf00l04(volatile uint8_t *bios,
- uint8_t *src,
- volatile uint8_t *dst,
- unsigned int page_size)
-{
- int i;
+ id1 = *(volatile uint8_t *)bios;
+ id2 = *(volatile uint8_t *)(bios + 0x01);
- for (i = 0; i < page_size; i++) {
- /* transfer data from source to destination */
- if (*src == 0xFF) {
- dst++, src++;
- /* If the data is 0xFF, don't program it */
- continue;
- }
- /*issue AUTO PROGRAM command */
- *dst = AUTO_PGRM;
- *dst++ = *src++;
+ /* Leave ID mode */
+ *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+ *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+ *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
- /* wait for Toggle bit ready */
-// toggle_ready_jedec(bios);
- }
+ myusec_delay(10);
- return (0);
+ printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
+
+ if (id1 != flash->manufacture_id || id2 != flash->model_id)
+ return 0;
+
+ map_flash_registers(flash);
+
+ return 1;
}
-int probe_lhf00l04(struct flashchip *flash)
+uint8_t wait_lhf00l04(volatile uint8_t *bios)
{
- volatile uint8_t *bios = flash->virt_addr;
- uint8_t id1, id2, tmp;
+ uint8_t status;
+ uint8_t id1, id2;
- /* save the value at the beginning of the Flash */
- tmp = *bios;
+ *bios = 0x70;
+ if ((*bios & 0x80) == 0) { // it's busy
+ while ((*bios & 0x80) == 0) ;
+ }
- *bios = RESET;
- myusec_delay(10);
+ status = *bios;
- *bios = READ_ID;
- myusec_delay(10);
- id1 = *(volatile uint8_t *) bios;
- myusec_delay(10);
- id2 = *(volatile uint8_t *) (bios + 0x01);
+ // put another command to get out of status register mode
- *bios = RESET;
+ *bios = 0x90;
myusec_delay(10);
- printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
- if (id1 == flash->manufacture_id && id2 == flash->model_id)
- return 1;
+ id1 = *(volatile uint8_t *)bios;
+ id2 = *(volatile uint8_t *)(bios + 0x01);
+
+ // this is needed to jam it out of "read id" mode
+ *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
+ *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
+ *(volatile uint8_t *)(bios + 0x5555) = 0xF0;
+
+ return status;
+}
+
+int erase_lhf00l04_block(struct flashchip *flash, int offset)
+{
+ volatile uint8_t *bios = flash->virtual_memory + offset;
+ volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;
+ uint8_t status;
+
+ // clear status register
+ *bios = 0x50;
+ printf("Erase at %p\n", bios);
+ status = wait_lhf00l04(flash->virtual_memory);
+ print_lhf00l04_status(status);
+ // clear write protect
+ printf("write protect is at %p\n", (wrprotect));
+ printf("write protect is 0x%x\n", *(wrprotect));
+ *(wrprotect) = 0;
+ printf("write protect is 0x%x\n", *(wrprotect));
+
+ // now start it
+ *(volatile uint8_t *)(bios) = 0x20;
+ *(volatile uint8_t *)(bios) = 0xd0;
+ myusec_delay(10);
+ // now let's see what the register is
+ status = wait_lhf00l04(flash->virtual_memory);
+ print_lhf00l04_status(status);
+ printf("DONE BLOCK 0x%x\n", offset);
- /* if there is no lhf00l04, restore the original value */
- *bios = tmp;
return 0;
}
int erase_lhf00l04(struct flashchip *flash)
{
- volatile uint8_t *bios = flash->virt_addr;
-
- unprotect_lhf00l04(bios);
- *bios = CHIP_ERASE;
- *bios = CHIP_ERASE;
- protect_lhf00l04(bios);
+ int i;
+ unsigned int total_size = flash->total_size * 1024;
- myusec_delay(10);
-// toggle_ready_jedec(bios);
+ printf("total_size is %d; flash->page_size is %d\n",
+ total_size, flash->page_size);
+ for (i = 0; i < total_size; i += flash->page_size)
+ erase_lhf00l04_block(flash, i);
+ printf("DONE ERASE\n");
- return (0);
+ return 0;
}
-int write_lhf00l04(struct flashchip *flash, uint8_t *buf)
+void write_page_lhf00l04(volatile uint8_t *bios, uint8_t *src,
+ volatile uint8_t *dst, int page_size)
{
int i;
- int total_size = flash->total_size * 1024, page_size =
- flash->page_size;
- volatile uint8_t *bios = flash->virt_addr;
- unprotect_lhf00l04(bios);
+ for (i = 0; i < page_size; i++) {
+ /* transfer data from source to destination */
+ *dst = 0x40;
+ *dst++ = *src++;
+ wait_lhf00l04(bios);
+ }
+}
- printf("Programming Page: ");
+int write_lhf00l04(struct flashchip *flash, uint8_t *buf)
+{
+ int i;
+ int total_size = flash->total_size * 1024;
+ int page_size = flash->page_size;
+ volatile uint8_t *bios = flash->virtual_memory;
+
+ erase_lhf00l04(flash);
+ if (*bios != 0xff) {
+ printf("ERASE FAILED!\n");
+ return -1;
+ }
+ printf("Programming page: ");
for (i = 0; i < total_size / page_size; i++) {
- /* erase the page before programming */
- erase_sector_lhf00l04(bios, i * page_size);
-
- /* write to the sector */
printf("%04d at address: 0x%08x", i, i * page_size);
- write_sector_lhf00l04(bios, buf + i * page_size,
- bios + i * page_size, page_size);
+ write_page_lhf00l04(bios, buf + i * page_size,
+ bios + i * page_size, page_size);
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
}
printf("\n");
+ protect_jedec(bios);
- protect_lhf00l04(bios);
-
- return (0);
+ return 0;
}
projects / coreboot.git / blobdiff