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@ -154,6 +154,63 @@ int i2c_set_bus_speed(unsigned int) |
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*/ |
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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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{ |
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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(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(read, 5, 1, do_i2c_read, "", ""), |
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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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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 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 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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#if defined(CONFIG_CMD_SDRAM) |
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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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#if defined(CONFIG_I2C_MUX) |
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int i2c_mux_add_device(I2C_MUX_DEVICE *dev) |
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{ |
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I2C_MUX_DEVICE *devtmp = i2c_mux_devices; |
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