Pull out the code which computes the length of the transfer
into separate code and clean it up a little. This again trims
down the code duplication.
Signed-off-by: Marek Vasut <ma...@denx.de>
Cc: Simon Glass <s...@chromium.org>
Cc: Tom Rini <tr...@ti.com>
Cc: Heiko Schocher <h...@denx.de>
---
common/cmd_eeprom.c | 66 ++++++++++++++++++++---------------------------------
1 file changed, 25 insertions(+), 41 deletions(-)
diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c
index 6f55306..231f424 100644
--- a/common/cmd_eeprom.c
+++ b/common/cmd_eeprom.c
@@ -104,6 +104,29 @@ static int eeprom_addr(unsigned dev_addr, unsigned offset,
uchar *addr)
return alen;
}
+static int eeprom_len(unsigned offset, unsigned end)
+{
+ unsigned len = end - offset;
+
+ /*
+ * For a FRAM device there is no limit on the number of the
+ * bytes that can be ccessed with the single read or write
+ * operation.
+ */
+#if !defined(CONFIG_SYS_I2C_FRAM)
+ unsigned blk_off = offset & 0xff;
+ unsigned maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);
+
+ if (maxlen > I2C_RXTX_LEN)
+ maxlen = I2C_RXTX_LEN;
+
+ if (len > maxlen)
+ len = maxlen;
+#endif
+
+ return len;
+}
+
static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
uchar *buffer, unsigned len, bool read)
{
@@ -130,7 +153,6 @@ static int eeprom_rw_block(unsigned offset, uchar *addr,
unsigned alen,
int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned
cnt)
{
unsigned end = offset + cnt;
- unsigned blk_off;
int rcode = 0;
uchar addr[3];
@@ -141,27 +163,10 @@ int eeprom_read (unsigned dev_addr, unsigned offset,
uchar *buffer, unsigned cnt
*/
while (offset < end) {
unsigned alen, len;
-#if !defined(CONFIG_SYS_I2C_FRAM)
- unsigned maxlen;
-#endif
- blk_off = offset & 0xFF; /* block offset */
alen = eeprom_addr(dev_addr, offset, addr);
- len = end - offset;
-
- /*
- * For a FRAM device there is no limit on the number of the
- * bytes that can be ccessed with the single read or write
- * operation.
- */
-#if !defined(CONFIG_SYS_I2C_FRAM)
- maxlen = 0x100 - blk_off;
- if (maxlen > I2C_RXTX_LEN)
- maxlen = I2C_RXTX_LEN;
- if (len > maxlen)
- len = maxlen;
-#endif
+ len = eeprom_len(offset, end);
rcode = eeprom_rw_block(offset, addr, alen, buffer, len, 1);
@@ -175,7 +180,6 @@ int eeprom_read (unsigned dev_addr, unsigned offset, uchar
*buffer, unsigned cnt
int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned
cnt)
{
unsigned end = offset + cnt;
- unsigned blk_off;
int rcode = 0;
uchar addr[3];
@@ -189,30 +193,10 @@ int eeprom_write (unsigned dev_addr, unsigned offset,
uchar *buffer, unsigned cn
while (offset < end) {
unsigned alen, len;
-#if !defined(CONFIG_SYS_I2C_FRAM)
- unsigned maxlen;
-#endif
- blk_off = offset & 0xFF; /* block offset */
alen = eeprom_addr(dev_addr, offset, addr);
- len = end - offset;
-
- /*
- * For a FRAM device there is no limit on the number of the
- * bytes that can be accessed with the single read or write
- * operation.
- */
-#if !defined(CONFIG_SYS_I2C_FRAM)
-
- maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);
-
- if (maxlen > I2C_RXTX_LEN)
- maxlen = I2C_RXTX_LEN;
-
- if (len > maxlen)
- len = maxlen;
-#endif
+ len = eeprom_len(offset, end);
rcode = eeprom_rw_block(offset, addr, alen, buffer, len, 0);
--
2.1.1
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