diff options
Diffstat (limited to 'cpu/mpc8260/i2c.c')
| -rw-r--r-- | cpu/mpc8260/i2c.c | 79 |
1 files changed, 56 insertions, 23 deletions
diff --git a/cpu/mpc8260/i2c.c b/cpu/mpc8260/i2c.c index c3af7b6d8..35cf8f143 100644 --- a/cpu/mpc8260/i2c.c +++ b/cpu/mpc8260/i2c.c @@ -36,6 +36,10 @@ DECLARE_GLOBAL_DATA_PTR; +#if defined(CONFIG_I2C_MULTI_BUS) +static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = 0; +#endif /* CONFIG_I2C_MULTI_BUS */ + /* uSec to wait between polls of the i2c */ #define DELAY_US 100 /* uSec to wait for the CPM to start processing the buffer */ @@ -50,12 +54,12 @@ DECLARE_GLOBAL_DATA_PTR; /*----------------------------------------------------------------------- * Set default values */ -#ifndef CFG_I2C_SPEED -#define CFG_I2C_SPEED 50000 +#ifndef CONFIG_SYS_I2C_SPEED +#define CONFIG_SYS_I2C_SPEED 50000 #endif -#ifndef CFG_I2C_SLAVE -#define CFG_I2C_SLAVE 0xFE +#ifndef CONFIG_SYS_I2C_SLAVE +#define CONFIG_SYS_I2C_SLAVE 0xFE #endif /*----------------------------------------------------------------------- */ @@ -172,7 +176,7 @@ i2c_roundrate(int hz, int speed, int filter, int modval, */ static int i2c_setrate(int hz, int speed) { - immap_t *immap = (immap_t *)CFG_IMMR ; + immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; int brgval, modval, /* 0-3 */ @@ -215,7 +219,7 @@ static int i2c_setrate(int hz, int speed) void i2c_init(int speed, int slaveadd) { - volatile immap_t *immap = (immap_t *)CFG_IMMR ; + volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; volatile cpm8260_t *cp = (cpm8260_t *)&immap->im_cpm; volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; volatile iic_t *iip; @@ -223,7 +227,7 @@ void i2c_init(int speed, int slaveadd) volatile I2C_BD *rxbd, *txbd; uint dpaddr; -#ifdef CFG_I2C_INIT_BOARD +#ifdef CONFIG_SYS_I2C_INIT_BOARD /* call board specific i2c bus reset routine before accessing the */ /* environment, which might be in a chip on that bus. For details */ /* about this problem see doc/I2C_Edge_Conditions. */ @@ -266,7 +270,7 @@ void i2c_init(int speed, int slaveadd) * divide BRGCLK by 1) */ PRINTD(("[I2C] Setting rate...\n")); - i2c_setrate (gd->brg_clk, CFG_I2C_SPEED) ; + i2c_setrate (gd->brg_clk, CONFIG_SYS_I2C_SPEED) ; /* Set I2C controller in master mode */ i2c->i2c_i2com = 0x01; @@ -305,7 +309,7 @@ void i2c_init(int speed, int slaveadd) static void i2c_newio(i2c_state_t *state) { - volatile immap_t *immap = (immap_t *)CFG_IMMR ; + volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; volatile iic_t *iip; uint dpaddr; @@ -490,7 +494,7 @@ int i2c_receive(i2c_state_t *state, static int i2c_doio(i2c_state_t *state) { - volatile immap_t *immap = (immap_t *)CFG_IMMR ; + volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; volatile iic_t *iip; volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; volatile I2C_BD *txbd, *rxbd; @@ -663,7 +667,7 @@ i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len) xaddr[2] = (addr >> 8) & 0xFF; xaddr[3] = addr & 0xFF; -#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW +#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW /* * EEPROM chips that implement "address overflow" are ones * like Catalyst 24WC04/08/16 which has 9/10/11 bits of address @@ -675,7 +679,7 @@ i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len) * be one byte because the extra address bits are hidden in the * chip address. */ - chip |= ((addr >> (alen * 8)) & CFG_I2C_EEPROM_ADDR_OVERFLOW); + chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW); #endif i2c_newio(&state); @@ -712,7 +716,7 @@ i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) xaddr[2] = (addr >> 8) & 0xFF; xaddr[3] = addr & 0xFF; -#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW +#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW /* * EEPROM chips that implement "address overflow" are ones * like Catalyst 24WC04/08/16 which has 9/10/11 bits of address @@ -724,7 +728,7 @@ i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) * be one byte because the extra address bits are hidden in the * chip address. */ - chip |= ((addr >> (alen * 8)) & CFG_I2C_EEPROM_ADDR_OVERFLOW); + chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW); #endif i2c_newio(&state); @@ -749,20 +753,49 @@ i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) return 0; } -uchar -i2c_reg_read(uchar chip, uchar reg) +#if defined(CONFIG_I2C_MULTI_BUS) +/* + * Functions for multiple I2C bus handling + */ +unsigned int i2c_get_bus_num(void) { - uchar buf; - - i2c_read(chip, reg, 1, &buf, 1); + return i2c_bus_num; +} - return (buf); +int i2c_set_bus_num(unsigned int bus) +{ +#if defined(CONFIG_I2C_MUX) + if (bus < CONFIG_SYS_MAX_I2C_BUS) { + i2c_bus_num = bus; + } else { + int ret; + + ret = i2x_mux_select_mux(bus); + if (ret == 0) + i2c_bus_num = bus; + else + return ret; + } +#else + if (bus >= CONFIG_SYS_MAX_I2C_BUS) + return -1; + i2c_bus_num = bus; +#endif + return 0; +} +/* TODO: add 100/400k switching */ +unsigned int i2c_get_bus_speed(void) +{ + return CONFIG_SYS_I2C_SPEED; } -void -i2c_reg_write(uchar chip, uchar reg, uchar val) +int i2c_set_bus_speed(unsigned int speed) { - i2c_write(chip, reg, 1, &val, 1); + if (speed != CONFIG_SYS_I2C_SPEED) + return -1; + + return 0; } +#endif /* CONFIG_I2C_MULTI_BUS */ #endif /* CONFIG_HARD_I2C */ |