@ -101,8 +101,31 @@ static uchar i2c_mm_last_chip;
static uint i2c_mm_last_addr ;
static uint i2c_mm_last_alen ;
/* If only one I2C bus is present, the list of devices to ignore when
* the probe command is issued is represented by a 1 D array of addresses .
* When multiple buses are present , the list is an array of bus - address
* pairs . The following macros take care of this */
# if defined(CFG_I2C_NOPROBES)
# if defined(CONFIG_I2C_MULTI_BUS)
static struct
{
uchar bus ;
uchar addr ;
} i2c_no_probes [ ] = CFG_I2C_NOPROBES ;
# define GET_BUS_NUM i2c_get_bus_num()
# define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
# define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
# define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
# else /* single bus */
static uchar i2c_no_probes [ ] = CFG_I2C_NOPROBES ;
# define GET_BUS_NUM 0
# define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
# define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
# define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
# endif /* CONFIG_MULTI_BUS */
# define NUM_ELEMENTS_NOPROBE (sizeof(i2c_no_probes) / sizeof(i2c_no_probes[0]))
# endif
static int
@ -538,14 +561,17 @@ int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
int j ;
# if defined(CFG_I2C_NOPROBES)
int k , skip ;
# endif
uchar bus = GET_BUS_NUM ;
# endif /* NOPROBES */
puts ( " Valid chip addresses: " ) ;
for ( j = 0 ; j < 128 ; j + + ) {
# if defined(CFG_I2C_NOPROBES)
skip = 0 ;
for ( k = 0 ; k < sizeof ( i2c_no_probes ) ; k + + ) {
if ( j = = i2c_no_probes [ k ] ) {
for ( k = 0 ; k < NUM_ELEMENTS_NOPROBE ; k + + )
{
if ( COMPARE_BUS ( bus , k ) & & COMPARE_ADDR ( j , k ) )
{
skip = 1 ;
break ;
}
@ -561,8 +587,11 @@ int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
# if defined(CFG_I2C_NOPROBES)
puts ( " Excluded chip addresses: " ) ;
for ( k = 0 ; k < sizeof ( i2c_no_probes ) ; k + + )
printf ( " %02X " , i2c_no_probes [ k ] ) ;
for ( k = 0 ; k < NUM_ELEMENTS_NOPROBE ; k + + )
{
if ( COMPARE_BUS ( bus , k ) )
printf ( " %02X " , NO_PROBE_ADDR ( k ) ) ;
}
putc ( ' \n ' ) ;
# endif
@ -873,6 +902,104 @@ int do_sdram ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
}
# endif /* CFG_CMD_SDRAM */
# if defined(CONFIG_I2C_CMD_TREE)
# if defined(CONFIG_I2C_MULTI_BUS)
int do_i2c_bus_num ( cmd_tbl_t * cmdtp , int flag , int argc , char * argv [ ] )
{
int bus_idx , ret = 0 ;
if ( argc = = 1 ) /* querying current setting */
{
printf ( " Current bus is %d \n " , i2c_get_bus_num ( ) ) ;
}
else
{
bus_idx = simple_strtoul ( argv [ 1 ] , NULL , 10 ) ;
printf ( " Setting bus to %d \n " , bus_idx ) ;
ret = i2c_set_bus_num ( bus_idx ) ;
if ( ret )
{
printf ( " Failure changing bus number (%d) \n " , ret ) ;
}
}
return ret ;
}
# endif /* CONFIG_I2C_MULTI_BUS */
int do_i2c_bus_speed ( cmd_tbl_t * cmdtp , int flag , int argc , char * argv [ ] )
{
int speed , ret = 0 ;
if ( argc = = 1 ) /* querying current speed */
{
printf ( " Current bus speed=%d \n " , i2c_get_bus_speed ( ) ) ;
}
else
{
speed = simple_strtoul ( argv [ 1 ] , NULL , 10 ) ;
printf ( " Setting bus speed to %d Hz \n " , speed ) ;
ret = i2c_set_bus_speed ( speed ) ;
if ( ret )
{
printf ( " Failure changing bus speed (%d) \n " , ret ) ;
}
}
return ret ;
}
int do_i2c ( cmd_tbl_t * cmdtp , int flag , int argc , char * argv [ ] )
{
# if defined(CONFIG_I2C_MULTI_BUS)
if ( ! strncmp ( argv [ 1 ] , " de " , 2 ) )
{
return do_i2c_bus_num ( cmdtp , flag , - - argc , + + argv ) ;
}
# endif /* CONFIG_I2C_MULTI_BUS */
if ( ! strncmp ( argv [ 1 ] , " sp " , 2 ) )
{
return do_i2c_bus_speed ( cmdtp , flag , - - argc , + + argv ) ;
}
if ( ! strncmp ( argv [ 1 ] , " md " , 2 ) )
{
return do_i2c_md ( cmdtp , flag , - - argc , + + argv ) ;
}
if ( ! strncmp ( argv [ 1 ] , " mm " , 2 ) )
{
return do_i2c_mm ( cmdtp , flag , - - argc , + + argv ) ;
}
if ( ! strncmp ( argv [ 1 ] , " mw " , 2 ) )
{
return do_i2c_mw ( cmdtp , flag , - - argc , + + argv ) ;
}
if ( ! strncmp ( argv [ 1 ] , " nm " , 2 ) )
{
return do_i2c_nm ( cmdtp , flag , - - argc , + + argv ) ;
}
if ( ! strncmp ( argv [ 1 ] , " cr " , 2 ) )
{
return do_i2c_crc ( cmdtp , flag , - - argc , + + argv ) ;
}
if ( ! strncmp ( argv [ 1 ] , " pr " , 2 ) )
{
return do_i2c_probe ( cmdtp , flag , - - argc , + + argv ) ;
}
if ( ! strncmp ( argv [ 1 ] , " lo " , 2 ) )
{
return do_i2c_loop ( cmdtp , flag , - - argc , + + argv ) ;
}
# if (CONFIG_COMMANDS & CFG_CMD_SDRAM)
if ( ! strncmp ( argv [ 1 ] , " sd " , 2 ) )
{
return do_sdram ( cmdtp , flag , - - argc , + + argv ) ;
}
# endif /* CFG_CMD_SDRAM */
else
{
printf ( " Usage: \n %s \n " , cmdtp - > usage ) ;
}
return 0 ;
}
# endif /* CONFIG_I2C_CMD_TREE */
/***************************************************/
@ -930,4 +1057,26 @@ U_BOOT_CMD(
" (valid chip values 50..57) \n "
) ;
# endif
# if defined(CONFIG_I2C_CMD_TREE)
U_BOOT_CMD (
i2c , 6 , 1 , do_i2c ,
" i2c - I2C sub-system \n " ,
# if defined(CONFIG_I2C_MULTI_BUS)
" dev [dev] - show or set current I2C bus \n "
# endif /* CONFIG_I2C_MULTI_BUS */
" i2c speed [speed] - show or set I2C bus speed \n "
" i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device \n "
" i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing) \n "
" 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 crc32 chip address[.0, .1, .2] count - compute CRC32 checksum \n "
" i2c probe - show devices on the I2C bus \n "
" i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device \n "
# if (CONFIG_COMMANDS & CFG_CMD_SDRAM)
" i2c sdram chip - print SDRAM configuration information \n "
# endif /* CFG_CMD_SDRAM */
) ;
# endif /* CONFIG_I2C_CMD_TREE */
# endif /* CFG_CMD_I2C */
Ben Warren
18 years ago
committed by
Kim Phillips