--- /dev/null
+/*
+ * (C) Copyright 2008 Semihalf
+ *
+ * Written by: Piotr Ziecik <kosmo@semihalf.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <flash.h>
+
+#include <asm/errno.h>
+#include <linux/mtd/mtd.h>
+
+extern flash_info_t flash_info[];
+
+static struct mtd_info cfi_mtd_info[CONFIG_SYS_MAX_FLASH_BANKS];
+
+static int cfi_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ flash_info_t *fi = mtd->priv;
+ size_t a_start = fi->start[0] + instr->addr;
+ size_t a_end = a_start + instr->len;
+ int s_first = -1;
+ int s_last = -1;
+ int error, sect;
+
+ for (sect = 0; sect < fi->sector_count - 1; sect++) {
+ if (a_start == fi->start[sect])
+ s_first = sect;
+
+ if (a_end == fi->start[sect + 1]) {
+ s_last = sect;
+ break;
+ }
+ }
+
+ if (s_first >= 0 && s_first <= s_last) {
+ instr->state = MTD_ERASING;
+
+ flash_set_verbose(0);
+ error = flash_erase(fi, s_first, s_last);
+ flash_set_verbose(1);
+
+ if (error) {
+ instr->state = MTD_ERASE_FAILED;
+ return -EIO;
+ }
+
+ instr->state = MTD_ERASE_DONE;
+ mtd_erase_callback(instr);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ flash_info_t *fi = mtd->priv;
+ u_char *f = (u_char*)(fi->start[0]) + from;
+
+ memcpy(buf, f, len);
+ *retlen = len;
+
+ return 0;
+}
+
+static int cfi_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ flash_info_t *fi = mtd->priv;
+ u_long t = fi->start[0] + to;
+ int error;
+
+ flash_set_verbose(0);
+ error = write_buff(fi, (u_char*)buf, t, len);
+ flash_set_verbose(1);
+
+ if (!error) {
+ *retlen = len;
+ return 0;
+ }
+
+ return -EIO;
+}
+
+static void cfi_mtd_sync(struct mtd_info *mtd)
+{
+ /*
+ * This function should wait until all pending operations
+ * finish. However this driver is fully synchronous, so
+ * this function returns immediately
+ */
+}
+
+static int cfi_mtd_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+ flash_info_t *fi = mtd->priv;
+
+ flash_set_verbose(0);
+ flash_protect(FLAG_PROTECT_SET, fi->start[0] + ofs,
+ fi->start[0] + ofs + len - 1, fi);
+ flash_set_verbose(1);
+
+ return 0;
+}
+
+static int cfi_mtd_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+ flash_info_t *fi = mtd->priv;
+
+ flash_set_verbose(0);
+ flash_protect(FLAG_PROTECT_CLEAR, fi->start[0] + ofs,
+ fi->start[0] + ofs + len - 1, fi);
+ flash_set_verbose(1);
+
+ return 0;
+}
+
+static int cfi_mtd_set_erasesize(struct mtd_info *mtd, flash_info_t *fi)
+{
+ int sect_size = 0;
+ int sect;
+
+ for (sect = 0; sect < fi->sector_count; sect++) {
+ if (!sect_size) {
+ sect_size = flash_sector_size(fi, sect);
+ continue;
+ }
+
+ if (sect_size != flash_sector_size(fi, sect)) {
+ sect_size = 0;
+ break;
+ }
+ }
+
+ if (!sect_size) {
+ puts("cfi-mtd: devices with multiple sector sizes are"
+ "not supported\n");
+ return -EINVAL;
+ }
+
+ mtd->erasesize = sect_size;
+
+ return 0;
+}
+
+int cfi_mtd_init(void)
+{
+ struct mtd_info *mtd;
+ flash_info_t *fi;
+ int error, i;
+
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ fi = &flash_info[i];
+ mtd = &cfi_mtd_info[i];
+
+ memset(mtd, 0, sizeof(struct mtd_info));
+
+ error = cfi_mtd_set_erasesize(mtd, fi);
+ if (error)
+ continue;
+
+ mtd->name = CFI_MTD_DEV_NAME;
+ mtd->type = MTD_NORFLASH;
+ mtd->flags = MTD_CAP_NORFLASH;
+ mtd->size = fi->size;
+ mtd->writesize = 1;
+
+ mtd->erase = cfi_mtd_erase;
+ mtd->read = cfi_mtd_read;
+ mtd->write = cfi_mtd_write;
+ mtd->sync = cfi_mtd_sync;
+ mtd->lock = cfi_mtd_lock;
+ mtd->unlock = cfi_mtd_unlock;
+ mtd->priv = fi;
+
+ if (add_mtd_device(mtd))
+ return -ENOMEM;
+ }
+
+ return 0;
+}
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