diff options
Diffstat (limited to 'common/cmd_i2c.c')
| -rw-r--r-- | common/cmd_i2c.c | 75 |
1 files changed, 51 insertions, 24 deletions
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c index 7c3ad00..ad38cbf 100644 --- a/common/cmd_i2c.c +++ b/common/cmd_i2c.c @@ -342,9 +342,10 @@ static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[ int ret; #ifdef CONFIG_DM_I2C struct udevice *dev; + struct dm_i2c_chip *i2c_chip; #endif - if (argc != 5) + if ((argc < 5) || (argc > 6)) return cmd_usage(cmdtp); /* @@ -367,7 +368,7 @@ static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[ return cmd_usage(cmdtp); /* - * Length is the number of objects, not number of bytes. + * Length is the number of bytes. */ length = simple_strtoul(argv[4], NULL, 16); @@ -377,22 +378,47 @@ static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[ ret = i2c_set_chip_offset_len(dev, alen); if (ret) return i2c_report_err(ret, I2C_ERR_WRITE); + i2c_chip = dev_get_parent_platdata(dev); + if (!i2c_chip) + return i2c_report_err(ret, I2C_ERR_WRITE); #endif - while (length-- > 0) { + if (argc == 6 && !strcmp(argv[5], "-s")) { + /* + * Write all bytes in a single I2C transaction. If the target + * device is an EEPROM, it is your responsibility to not cross + * a page boundary. No write delay upon completion, take this + * into account if linking commands. + */ #ifdef CONFIG_DM_I2C - ret = dm_i2c_write(dev, devaddr++, memaddr++, 1); + i2c_chip->flags &= ~DM_I2C_CHIP_WR_ADDRESS; + ret = dm_i2c_write(dev, devaddr, memaddr, length); #else - ret = i2c_write(chip, devaddr++, alen, memaddr++, 1); + ret = i2c_write(chip, devaddr, alen, memaddr, length); #endif if (ret) return i2c_report_err(ret, I2C_ERR_WRITE); + } else { + /* + * Repeated addressing - perform <length> separate + * write transactions of one byte each + */ + while (length-- > 0) { +#ifdef CONFIG_DM_I2C + i2c_chip->flags |= DM_I2C_CHIP_WR_ADDRESS; + ret = dm_i2c_write(dev, devaddr++, memaddr++, 1); +#else + ret = i2c_write(chip, devaddr++, alen, memaddr++, 1); +#endif + if (ret) + return i2c_report_err(ret, I2C_ERR_WRITE); /* * No write delay with FRAM devices. */ #if !defined(CONFIG_SYS_I2C_FRAM) - udelay(11000); + udelay(11000); #endif + } } return 0; } @@ -518,7 +544,7 @@ static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[] ret = i2c_read(chip, addr, alen, linebuf, linebytes); #endif if (ret) - i2c_report_err(ret, I2C_ERR_READ); + return i2c_report_err(ret, I2C_ERR_READ); else { printf("%04x:", addr); cp = linebuf; @@ -616,7 +642,7 @@ static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[] ret = i2c_write(chip, addr++, alen, &byte, 1); #endif if (ret) - i2c_report_err(ret, I2C_ERR_WRITE); + return i2c_report_err(ret, I2C_ERR_WRITE); /* * Wait for the write to complete. The write can take * up to 10mSec (we allow a little more time). @@ -798,16 +824,15 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const arg ret = i2c_read(chip, addr, alen, (uchar *)&data, size); #endif if (ret) - i2c_report_err(ret, I2C_ERR_READ); - else { - data = cpu_to_be32(data); - if (size == 1) - printf(" %02lx", (data >> 24) & 0x000000FF); - else if (size == 2) - printf(" %04lx", (data >> 16) & 0x0000FFFF); - else - printf(" %08lx", data); - } + return i2c_report_err(ret, I2C_ERR_READ); + + data = cpu_to_be32(data); + if (size == 1) + printf(" %02lx", (data >> 24) & 0x000000FF); + else if (size == 2) + printf(" %04lx", (data >> 16) & 0x0000FFFF); + else + printf(" %08lx", data); nbytes = cli_readline(" ? "); if (nbytes == 0) { @@ -848,7 +873,8 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const arg (uchar *)&data, size); #endif if (ret) - i2c_report_err(ret, I2C_ERR_WRITE); + return i2c_report_err(ret, + I2C_ERR_WRITE); #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); #endif @@ -1730,7 +1756,7 @@ static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const #endif if (argc == 1) { #ifdef CONFIG_DM_I2C - speed = i2c_get_bus_speed(bus); + speed = dm_i2c_get_bus_speed(bus); #else speed = i2c_get_bus_speed(); #endif @@ -1740,7 +1766,7 @@ static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const speed = simple_strtoul(argv[1], NULL, 10); printf("Setting bus speed to %d Hz\n", speed); #ifdef CONFIG_DM_I2C - ret = i2c_set_bus_speed(bus, speed); + ret = dm_i2c_set_bus_speed(bus, speed); #else ret = i2c_set_bus_speed(speed); #endif @@ -1827,7 +1853,7 @@ static cmd_tbl_t cmd_i2c_sub[] = { 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(write, 5, 0, do_i2c_write, "", ""), + U_BOOT_CMD_MKENT(write, 6, 0, do_i2c_write, "", ""), #ifdef CONFIG_DM_I2C U_BOOT_CMD_MKENT(flags, 2, 1, do_i2c_flags, "", ""), #endif @@ -1894,7 +1920,8 @@ static char i2c_help_text[] = "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n" "i2c probe [address] - test for and show device(s) on the I2C bus\n" "i2c read chip address[.0, .1, .2] length memaddress - read to memory\n" - "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\n" + "i2c write memaddress chip address[.0, .1, .2] length [-s] - write memory\n" + " to I2C; the -s option selects bulk write in a single transaction\n" #ifdef CONFIG_DM_I2C "i2c flags chip [flags] - set or get chip flags\n" #endif @@ -1906,7 +1933,7 @@ static char i2c_help_text[] = #endif U_BOOT_CMD( - i2c, 6, 1, do_i2c, + i2c, 7, 1, do_i2c, "I2C sub-system", i2c_help_text ); |