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cmd_i2c: introduced get_alen helper function

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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>
This commit is contained in:
Frans Meulenbroeks
2010-03-26 09:46:41 +01:00
committed by Heiko Schocher
parent a266fe955a
commit 2c0dc99020
1 changed files with 47 additions and 72 deletions
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95
common/cmd_i2c.c
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@@ -150,6 +150,29 @@ int __def_i2c_set_bus_speed(unsigned int speed)
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);
@@ -177,18 +199,11 @@ 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) {
alen = get_alen(argv[2]);
if (alen == 0) {
cmd_usage(cmdtp);
return 1;
}
break;
} else if (argv[2][j] == '\0')
break;
}
/*
* Length is the number of objects, not number of bytes.
@@ -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
@@ -246,18 +260,11 @@ 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) {
alen = get_alen(argv[2]);
if (alen == 0) {
cmd_usage(cmdtp);
return 1;
}
break;
} else if (argv[2][j] == '\0')
break;
}
/*
* If another parameter, it is the length to display.
@@ -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);
@@ -340,18 +346,11 @@ 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) {
alen = get_alen(argv[2]);
if (alen == 0) {
cmd_usage(cmdtp);
return 1;
}
break;
} else if (argv[2][j] == '\0')
break;
}
/*
* Value to write is always specified.
@@ -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);
@@ -414,18 +412,11 @@ 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) {
alen = get_alen(argv[2]);
if (alen == 0) {
cmd_usage(cmdtp);
return 1;
}
break;
} else if (argv[2][j] == '\0')
break;
}
/*
* Count is always specified
@@ -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) {
@@ -504,18 +494,11 @@ 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) {
alen = get_alen(argv[2]);
if (alen == 0) {
cmd_usage(cmdtp);
return 1;
}
break;
} else if (argv[2][j] == '\0')
break;
}
}
/*
@@ -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);
@@ -660,18 +642,11 @@ 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) {
alen = get_alen(argv[2]);
if (alen == 0) {
cmd_usage(cmdtp);
return 1;
}
break;
} else if (argv[2][j] == '\0')
break;
}
/*
* Length is the number of objects, not number of bytes.