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authorFrans Meulenbroeks <fransmeulenbroeks@gmail.com>2010-03-26 09:46:41 +0100
committerHeiko Schocher <hs@denx.de>2010-03-29 13:28:57 +0200
commit2c0dc990202c69a6231122ec2463c4e3076a16f3 (patch)
tree2cd1d1e4314b04e83f1c7bd0e274ca563e4a7a91 /common/cmd_i2c.c
parenta266fe955a55bb7a03a67f3c91033068f317b337 (diff)
downloadu-boot-linaro-natty-2c0dc990202c69a6231122ec2463c4e3076a16f3.tar.gz
cmd_i2c: introduced get_alen helper function
The code to parse alen appeared 6 times in the function. Factored this out in a small helper function Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Diffstat (limited to 'common/cmd_i2c.c')
-rw-r--r--common/cmd_i2c.c119
1 files changed, 47 insertions, 72 deletions
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
index bf7f6d352..e98b35c74 100644
--- a/common/cmd_i2c.c
+++ b/common/cmd_i2c.c
@@ -151,6 +151,29 @@ int i2c_set_bus_speed(unsigned int)
__attribute__((weak, alias("__def_i2c_set_bus_speed")));
/*
+ * get_alen: small parser helper function to get address length
+ * returns the address length,or 0 on error
+ */
+static uint get_alen(char *arg)
+{
+ int j;
+ int alen;
+
+ alen = 1;
+ for (j = 0; j < 8; j++) {
+ if (arg[j] == '.') {
+ alen = arg[j+1] - '0';
+ if (alen > 3) {
+ return 0;
+ }
+ break;
+ } else if (arg[j] == '\0')
+ break;
+ }
+ return alen;
+}
+
+/*
* Syntax:
* i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
*/
@@ -160,7 +183,6 @@ static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
u_char chip;
uint devaddr, alen, length;
u_char *memaddr;
- int j;
if (argc != 5) {
cmd_usage(cmdtp);
@@ -177,17 +199,10 @@ static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* 2 bytes long. Some day it might be 3 bytes long :-).
*/
devaddr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 3) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*
@@ -234,7 +249,6 @@ static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
/*
* New command specified.
*/
- alen = 1;
/*
* I2C chip address
@@ -246,17 +260,10 @@ static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* 2 bytes long. Some day it might be 3 bytes long :-).
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 3) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*
@@ -324,7 +331,6 @@ static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
uint alen;
uchar byte;
int count;
- int j;
if ((argc < 4) || (argc > 5)) {
cmd_usage(cmdtp);
@@ -340,17 +346,10 @@ static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* Address is always specified.
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 3) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*
@@ -398,7 +397,6 @@ static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
uchar byte;
ulong crc;
ulong err;
- int j;
if (argc < 4) {
cmd_usage(cmdtp);
@@ -414,17 +412,10 @@ static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* Address is always specified.
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 3) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*
@@ -469,7 +460,6 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
ulong data;
int size = 1;
int nbytes;
- int j;
extern char console_buffer[];
if (argc != 3) {
@@ -504,17 +494,10 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
* Address is always specified.
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 3) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
}
@@ -644,7 +627,6 @@ static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
uint length;
u_char bytes[16];
int delay;
- int j;
if (argc < 3) {
cmd_usage(cmdtp);
@@ -660,17 +642,10 @@ static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* Address is always specified.
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 3) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*