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https://github.com/AsahiLinux/u-boot
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cmd_i2c.c: added i2c read to memory function
Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
This commit is contained in:
parent
fb0070e910
commit
652e53546b
1 changed files with 59 additions and 1 deletions
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@ -154,6 +154,63 @@ int i2c_set_bus_speed(unsigned int)
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*/
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*/
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#define DISP_LINE_LEN 16
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#define DISP_LINE_LEN 16
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/*
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* Syntax:
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* i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
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*/
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int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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u_char chip;
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uint devaddr, alen, length;
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u_char *memaddr;
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int j;
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if (argc != 5) {
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cmd_usage(cmdtp);
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return 1;
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}
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/*
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* I2C chip address
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*/
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chip = simple_strtoul(argv[1], NULL, 16);
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/*
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* I2C data address within the chip. This can be 1 or
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* 2 bytes long. Some day it might be 3 bytes long :-).
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*/
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devaddr = simple_strtoul(argv[2], NULL, 16);
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alen = 1;
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for (j = 0; j < 8; j++) {
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if (argv[2][j] == '.') {
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alen = argv[2][j+1] - '0';
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if (alen > 3) {
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cmd_usage(cmdtp);
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return 1;
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}
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break;
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} else if (argv[2][j] == '\0')
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break;
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}
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/*
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* Length is the number of objects, not number of bytes.
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*/
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length = simple_strtoul(argv[3], NULL, 16);
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/*
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* memaddr is the address where to store things in memory
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*/
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memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
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if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
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puts ("Error reading the chip.\n");
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return 1;
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}
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return 0;
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}
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int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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{
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u_char chip;
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u_char chip;
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@ -1272,6 +1329,7 @@ static cmd_tbl_t cmd_i2c_sub[] = {
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U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
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U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
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U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
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U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
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U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
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U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
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U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
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U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
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U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
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#if defined(CONFIG_CMD_SDRAM)
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#if defined(CONFIG_CMD_SDRAM)
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U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
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U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
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@ -1315,6 +1373,7 @@ U_BOOT_CMD(
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"i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
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"i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
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"i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
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"i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
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"i2c probe - show devices on the I2C bus\n"
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"i2c probe - show devices on the I2C bus\n"
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"i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
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"i2c reset - re-init the I2C Controller\n"
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"i2c reset - re-init the I2C Controller\n"
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#if defined(CONFIG_CMD_SDRAM)
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#if defined(CONFIG_CMD_SDRAM)
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"i2c sdram chip - print SDRAM configuration information\n"
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"i2c sdram chip - print SDRAM configuration information\n"
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@ -1323,7 +1382,6 @@ U_BOOT_CMD(
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);
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);
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#if defined(CONFIG_I2C_MUX)
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#if defined(CONFIG_I2C_MUX)
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int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
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int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
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{
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{
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I2C_MUX_DEVICE *devtmp = i2c_mux_devices;
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I2C_MUX_DEVICE *devtmp = i2c_mux_devices;
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