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cmd_i2c.c: added i2c read to memory function

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Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
This commit is contained in:
Frans Meulenbroeks 2010-02-25 10:12:16 +01:00 committed by Wolfgang Denk
parent fb0070e910
commit 652e53546b
1 changed files with 59 additions and 1 deletions
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60
common/cmd_i2c.c
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@ -154,6 +154,63 @@ int i2c_set_bus_speed(unsigned int)
*/
#define DISP_LINE_LEN 16
/*
* Syntax:
* i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
*/
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);
return 1;
}
/*
* I2C chip address
*/
chip = simple_strtoul(argv[1], NULL, 16);
/*
* I2C data address within the chip. This can be 1 or
* 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;
}
/*
* Length is the number of objects, not number of bytes.
*/
length = simple_strtoul(argv[3], NULL, 16);
/*
* memaddr is the address where to store things in memory
*/
memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
puts ("Error reading the chip.\n");
return 1;
}
return 0;
}
int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
u_char chip;
@ -1272,6 +1329,7 @@ static cmd_tbl_t cmd_i2c_sub[] = {
U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
#if defined(CONFIG_CMD_SDRAM)
U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
@ -1315,6 +1373,7 @@ U_BOOT_CMD(
"i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
"i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
"i2c probe - show devices on the I2C bus\n"
"i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
"i2c reset - re-init the I2C Controller\n"
#if defined(CONFIG_CMD_SDRAM)
"i2c sdram chip - print SDRAM configuration information\n"
@ -1323,7 +1382,6 @@ U_BOOT_CMD(
);
#if defined(CONFIG_I2C_MUX)
int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
{
I2C_MUX_DEVICE *devtmp = i2c_mux_devices;