Merge branch 'next' of git://git.denx.de/u-boot-mpc83xx

[u-boot] / drivers / mtd / st_smi.c

diff --git a/drivers/mtd/st_smi.c b/drivers/mtd/st_smi.c
index 77e36af5e3fc10d41ea4132d9a5c2df368bca1c7..208119c5f06e74342e85e3991deacb10f248967f 100644 (file)
--- a/drivers/mtd/st_smi.c
+++ b/drivers/mtd/st_smi.c
@@ -2,23 +2,7 @@
  * (C) Copyright 2009
  * Vipin Kumar, ST Microelectronics, vipin.kumar@st.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
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
@@ -362,7 +346,7 @@ static int smi_sector_erase(flash_info_t *info, unsigned int sector)
  * smi_write - Write to SMI flash
  * @src_addr:   source buffer
  * @dst_addr:   destination buffer
- * @length:     length to write in words
+ * @length:     length to write in bytes
  * @bank:       bank base address
  *
  * Write to SMI flash
@@ -370,7 +354,10 @@ static int smi_sector_erase(flash_info_t *info, unsigned int sector)
 static int smi_write(unsigned int *src_addr, unsigned int *dst_addr,
                     unsigned int length, ulong bank_addr)
 {
+       u8 *src_addr8 = (u8 *)src_addr;
+       u8 *dst_addr8 = (u8 *)dst_addr;
        int banknum;
+       int i;
 
        switch (bank_addr) {
        case SMIBANK0_BASE:
@@ -399,7 +386,7 @@ static int smi_write(unsigned int *src_addr, unsigned int *dst_addr,
                return -EIO;
 
        /* Perform the write command */
-       while (length--) {
+       for (i = 0; i < length; i += 4) {
                if (((ulong) (dst_addr) % SFLASH_PAGE_SIZE) == 0) {
                        if (smi_wait_till_ready(banknum,
                                                CONFIG_SYS_FLASH_WRITE_TOUT))
@@ -409,7 +396,18 @@ static int smi_write(unsigned int *src_addr, unsigned int *dst_addr,
                                return -EIO;
                }
 
-               *dst_addr++ = *src_addr++;
+               if (length < 4) {
+                       int k;
+
+                       /*
+                        * Handle special case, where length < 4 (redundant env)
+                        */
+                       for (k = 0; k < length; k++)
+                               *dst_addr8++ = *src_addr8++;
+               } else {
+                       /* Normal 32bit write */
+                       *dst_addr++ = *src_addr++;
+               }
 
                if ((readl(&smicntl->smi_sr) & (ERF1 | ERF2)))
                        return -EIO;
@@ -435,7 +433,7 @@ static int smi_write(unsigned int *src_addr, unsigned int *dst_addr,
 int write_buff(flash_info_t *info, uchar *src, ulong dest_addr, ulong length)
 {
        return smi_write((unsigned int *)src, (unsigned int *)dest_addr,
-                 (length + 3) / 4, info->start[0]);
+                        length, info->start[0]);
 }
 
 /*