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Diffstat (limited to 'cpu/mpc8260/i2c.c')
-rw-r--r--cpu/mpc8260/i2c.c77
1 files changed, 63 insertions, 14 deletions
diff --git a/cpu/mpc8260/i2c.c b/cpu/mpc8260/i2c.c
index c3af7b6..a934193 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);
@@ -765,4 +769,49 @@ i2c_reg_write(uchar chip, uchar reg, uchar val)
i2c_write(chip, reg, 1, &val, 1);
}
+#if defined(CONFIG_I2C_MULTI_BUS)
+/*
+ * Functions for multiple I2C bus handling
+ */
+unsigned int i2c_get_bus_num(void)
+{
+ return i2c_bus_num;
+}
+
+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;
+}
+
+int i2c_set_bus_speed(unsigned int speed)
+{
+ if (speed != CONFIG_SYS_I2C_SPEED)
+ return -1;
+
+ return 0;
+}
+
+#endif /* CONFIG_I2C_MULTI_BUS */
#endif /* CONFIG_HARD_I2C */