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-rw-r--r--util/flashrom/sb600spi.c175
1 files changed, 175 insertions, 0 deletions
diff --git a/util/flashrom/sb600spi.c b/util/flashrom/sb600spi.c
new file mode 100644
index 0000000000..03504032e0
--- /dev/null
+++ b/util/flashrom/sb600spi.c
@@ -0,0 +1,175 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2008 Stefan Wildemann <stefan.wildemann@kontron.com>
+ * Copyright (C) 2008 Claus Gindhart <claus.gindhart@kontron.com>
+ * Copyright (C) 2008 Dominik Geyer <dominik.geyer@kontron.com>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <sys/mman.h>
+#include <pci/pci.h>
+#include "flash.h"
+#include "spi.h"
+
+typedef struct _spi_controller {
+ unsigned int spi_cntrl0; /* 00h */
+ unsigned int restrictedcmd1; /* 04h */
+ unsigned int restrictedcmd2; /* 08h */
+ unsigned int spi_cntrl1; /* 0ch */
+ unsigned int spi_cmdvalue0; /* 10h */
+ unsigned int spi_cmdvalue1; /* 14h */
+ unsigned int spi_cmdvalue2; /* 18h */
+ unsigned int spi_fakeid; /* 1Ch */
+} sb600_spi_controller;
+
+sb600_spi_controller *spi_bar = NULL;
+uint8_t volatile *sb600_spibar;
+
+int sb600_spi_read(struct flashchip *flash, uint8_t *buf)
+{
+ int rc = 0, i;
+ int total_size = flash->total_size * 1024;
+ int page_size = 8;
+
+ for (i = 0; i < total_size / page_size; i++)
+ spi_nbyte_read(i * page_size, (void *)(buf + i * page_size),
+ page_size);
+ return rc;
+}
+
+uint8_t sb600_read_status_register(void)
+{
+ const unsigned char cmd[0x02] = { JEDEC_RDSR, 0x00 };
+ unsigned char readarr[JEDEC_RDSR_INSIZE];
+
+ /* Read Status Register */
+ spi_command(sizeof(cmd), sizeof(readarr), cmd, readarr);
+ return readarr[0];
+}
+
+int sb600_spi_write(struct flashchip *flash, uint8_t *buf)
+{
+ int rc = 0, i;
+ int total_size = flash->total_size * 1024;
+
+ /* Erase first */
+ printf("Erasing flash before programming... ");
+ flash->erase(flash);
+ printf("done.\n");
+
+ printf("Programming flash");
+ for (i = 0; i < total_size; i++, buf++) {
+ spi_disable_blockprotect();
+ spi_write_enable();
+ spi_byte_program(i, *buf);
+ /* wait program complete. */
+ if (i % 0x8000 == 0)
+ printf(".");
+ while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
+ ;
+ }
+ printf(" done.\n");
+ return rc;
+}
+
+void reset_internal_fifo_pointer(void)
+{
+ sb600_spibar[2] |= 0x10;
+
+ while (sb600_spibar[0xD] & 0x7)
+ printf("reset\n");
+}
+
+void execute_command(void)
+{
+ sb600_spibar[2] |= 1;
+
+ while (sb600_spibar[2] & 1)
+ ;
+}
+
+int sb600_spi_command(unsigned int writecnt, unsigned int readcnt,
+ const unsigned char *writearr, unsigned char *readarr)
+{
+ int count;
+ /* First byte is cmd which can not being sent through FIFO. */
+ unsigned char cmd = *writearr++;
+
+ writecnt--;
+
+ spi_bar = (sb600_spi_controller *) sb600_spibar;
+
+ printf_debug("%s, cmd=%x, writecnt=%x, readcnt=%x\n",
+ __func__, cmd, writecnt, readcnt);
+
+ if (readcnt > 8) {
+ printf("%s, SB600 SPI controller can not receive %d bytes, "
+ "which is limited with 8 bytes\n", __func__, readcnt);
+ return 1;
+ }
+
+ if (writecnt > 8) {
+ printf("%s, SB600 SPI controller can not sent %d bytes, "
+ "which is limited with 8 bytes\n", __func__, writecnt);
+ return 1;
+ }
+
+ sb600_spibar[0] = cmd;
+ sb600_spibar[1] = readcnt << 4 | (writecnt);
+
+ /* Before we use the FIFO, reset it first. */
+ reset_internal_fifo_pointer();
+
+ /* Send the write byte to FIFO. */
+ for (count = 0; count < writecnt; count++, writearr++) {
+ printf_debug(" [%x]", *writearr);
+ sb600_spibar[0xC] = *writearr;
+ }
+ printf_debug("\n");
+
+ /*
+ * We should send the data by sequence, which means we need to reset
+ * the FIFO pointer to the first byte we want to send.
+ */
+ reset_internal_fifo_pointer();
+
+ execute_command();
+
+ /*
+ * After the command executed, we should find out the index of the
+ * received byte. Here we just reset the FIFO pointer, skip the
+ * writecnt, is there anyone who have anther method to replace it?
+ */
+ reset_internal_fifo_pointer();
+
+ for (count = 0; count < writecnt; count++) {
+ cmd = sb600_spibar[0xC]; /* Skip the byte we send. */
+ printf_debug("[ %2x]", cmd);
+ }
+
+ printf_debug("The FIFO pointer 6 is %d.\n", sb600_spibar[0xd] & 0x07);
+ for (count = 0; count < readcnt; count++, readarr++) {
+ *readarr = sb600_spibar[0xC];
+ printf_debug("[%02x]", *readarr);
+ }
+ printf_debug("\n");
+
+ return 0;
+}