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authorYinghai Lu <yinghai.lu@amd.com>2007-01-22 20:21:17 +0000
committerUwe Hermann <uwe@hermann-uwe.de>2007-01-22 20:21:17 +0000
commitca782973745545ab978fdfcabe9fa9efcc6c4db3 (patch)
treeed5db734462798ef86522fe09fe36fd10389d12b /sst49lfxxxc.c
parent424b7cf57fb6b54498dfee9632d3e060eec63fd6 (diff)
downloadast2050-flashrom-ca782973745545ab978fdfcabe9fa9efcc6c4db3.zip
ast2050-flashrom-ca782973745545ab978fdfcabe9fa9efcc6c4db3.tar.gz
Add support for the SST-49LF004C, SST-49LF008C, SST-49LF016C
Also add suport for NVIDIA MCP55. Corresponding to flashrom svn r85 and coreboot v2 svn r2537. Signed-off-by: Yinghai Lu <yinghai.lu@amd.com> Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Peter Stuge <peter@stuge.se>
Diffstat (limited to 'sst49lfxxxc.c')
-rw-r--r--sst49lfxxxc.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/sst49lfxxxc.c b/sst49lfxxxc.c
new file mode 100644
index 0000000..cd29d0b
--- /dev/null
+++ b/sst49lfxxxc.c
@@ -0,0 +1,204 @@
+/*
+ * 49lfxxxc.c: driver for SST49LFXXXC flash models.
+ *
+ *
+ * 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 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:
+ * SST49LFxxxC data sheets
+ *
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/io.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "flash.h"
+#include "jedec.h"
+#include "debug.h"
+
+#define SECTOR_ERASE 0x30
+#define BLOCK_ERASE 0x20
+#define ERASE 0xD0
+#define AUTO_PGRM 0x10
+#define RESET 0xFF
+#define READ_ID 0x90
+#define READ_STATUS 0x70
+#define CLEAR_STATUS 0x50
+
+#define STATUS_BPS (1 << 1)
+#define STATUS_ESS (1 << 6)
+#define STATUS_WSMS (1 << 7)
+
+
+static __inline__ int write_lockbits_49lfxxxc(volatile uint8_t *bios, int size,
+ unsigned char bits)
+{
+ int i, left = size;
+ unsigned long address;
+
+ //printf("bios=0x%08lx\n", (unsigned long)bios);
+ for (i = 0; left > 65536; i++, left -= 65536) {
+ //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFC00000 - size + (i * 65536) + 2, *(bios + (i * 65536) + 2) );
+ *(bios + (i * 65536) + 2) = bits;
+ }
+ address = i * 65536;
+ //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) );
+ *(bios + address + 2) = bits;
+ address += 32768;
+ //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) );
+ *(bios + address + 2) = bits;
+ address += 8192;
+ //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) );
+ *(bios + address + 2) = bits;
+ address += 8192;
+ //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) );
+ *(bios + address + 2) = bits;
+
+
+ return (0);
+}
+
+static __inline__ int erase_sector_49lfxxxc(volatile uint8_t *bios,
+ unsigned long address)
+{
+ unsigned char status;
+
+ *bios = SECTOR_ERASE;
+ *(bios + address) = ERASE;
+
+ do {
+ status = *bios;
+ if (status & (STATUS_ESS | STATUS_BPS)) {
+ printf("sector erase FAILED at address=0x%08lx status=0x%01x\n", (unsigned long)bios + address, status);
+ *bios = CLEAR_STATUS;
+ return(-1);
+ }
+ } while (!(status & STATUS_WSMS));
+
+ return (0);
+}
+
+static __inline__ int write_sector_49lfxxxc(volatile uint8_t *bios,
+ uint8_t *src,
+ volatile uint8_t *dst,
+ unsigned int page_size)
+{
+ int i;
+ unsigned char status;
+
+ *bios = CLEAR_STATUS;
+ 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 */
+ *bios = AUTO_PGRM;
+ *dst++ = *src++;
+
+ do {
+ status = *bios;
+ if (status & (STATUS_ESS | STATUS_BPS)) {
+ printf("sector write FAILED at address=0x%08lx status=0x%01x\n", (unsigned long)dst, status);
+ *bios = CLEAR_STATUS;
+ return(-1);
+ }
+ } while (!(status & STATUS_WSMS));
+ }
+
+ return (0);
+}
+
+int probe_49lfxxxc(struct flashchip *flash)
+{
+ volatile uint8_t *bios = flash->virt_addr;
+ uint8_t id1, id2;
+ size_t size = flash->total_size * 1024;
+
+ *bios = RESET;
+
+ *bios = READ_ID;
+ id1 = *(volatile uint8_t *) bios;
+ id2 = *(volatile uint8_t *) (bios + 0x01);
+
+ *bios = RESET;
+
+ printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
+ if (!(id1 == flash->manufacture_id && id2 == flash->model_id))
+ return 0;
+
+ bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
+ flash->fd_mem, (off_t) (0xFFFFFFFF - 0x400000 - size + 1));
+ if (bios == MAP_FAILED) {
+ // it's this part but we can't map it ...
+ perror("Error MMAP /dev/mem");
+ exit(1);
+ }
+ flash->virt_addr_2 = bios;
+ return 1;
+}
+
+int erase_49lfxxxc(struct flashchip *flash)
+{
+ volatile uint8_t *bios = flash->virt_addr;
+ volatile uint8_t *bios2 = flash->virt_addr_2;
+ int i;
+ unsigned int total_size = flash->total_size * 1024;
+
+ write_lockbits_49lfxxxc(bios2, total_size, 0);
+ for (i = 0; i < total_size; i += flash->page_size)
+ if (erase_sector_49lfxxxc(bios, i) != 0 )
+ return (-1);
+
+ *bios = RESET;
+ return (0);
+}
+
+int write_49lfxxxc(struct flashchip *flash, uint8_t *buf)
+{
+ int i;
+ int total_size = flash->total_size * 1024, page_size =
+ flash->page_size;
+ volatile uint8_t *bios = flash->virt_addr;
+
+
+ write_lockbits_49lfxxxc(flash->virt_addr_2, total_size, 0);
+ printf("Programming Page: ");
+ for (i = 0; i < total_size / page_size; i++) {
+ /* erase the page before programming */
+ erase_sector_49lfxxxc(bios, i * page_size);
+
+ /* write to the sector */
+ printf("%04d at address: 0x%08x", i, i * page_size);
+ write_sector_49lfxxxc(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");
+
+ *bios = RESET;
+ return (0);
+}
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