diff options
Diffstat (limited to 'drivers/i2c/mv_i2c.c')
| -rw-r--r-- | drivers/i2c/mv_i2c.c | 44 |
1 files changed, 25 insertions, 19 deletions
diff --git a/drivers/i2c/mv_i2c.c b/drivers/i2c/mv_i2c.c index dcbe1aefa..b93922bdb 100644 --- a/drivers/i2c/mv_i2c.c +++ b/drivers/i2c/mv_i2c.c @@ -67,6 +67,27 @@ struct mv_i2c { }; static struct mv_i2c *base; +static void i2c_board_init(struct mv_i2c *base) +{ +#ifdef CONFIG_SYS_I2C_INIT_BOARD + u32 icr; + /* + * 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. + * + * disable I2C controller first, otherwhise it thinks we want to + * talk to the slave port... + */ + icr = readl(&base->icr); + writel(readl(&base->icr) & ~(ICR_SCLE | ICR_IUE), &base->icr); + + i2c_init_board(); + + writel(icr, &base->icr); +#endif +} + #ifdef CONFIG_I2C_MULTI_BUS static u32 i2c_regs[CONFIG_MV_I2C_NUM] = CONFIG_MV_I2C_REG; static unsigned int bus_initialized[CONFIG_MV_I2C_NUM]; @@ -83,7 +104,7 @@ int i2c_set_bus_num(unsigned int bus) current_bus = bus; if (!bus_initialized[current_bus]) { - i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + i2c_board_init(base); bus_initialized[current_bus] = 1; } @@ -253,7 +274,7 @@ transfer_error_bus_busy: ret = -6; goto i2c_transfer_finish; i2c_transfer_finish: - PRINTD(("i2c_transfer: ISR: 0x%04x\n", ISR)); + PRINTD(("i2c_transfer: ISR: 0x%04x\n", readl(&base->isr))); i2c_reset(); return ret; } @@ -264,28 +285,13 @@ i2c_transfer_finish: void i2c_init(int speed, int slaveaddr) { #ifdef CONFIG_I2C_MULTI_BUS + current_bus = 0; base = (struct mv_i2c *)i2c_regs[current_bus]; #else base = (struct mv_i2c *)CONFIG_MV_I2C_REG; #endif -#ifdef CONFIG_SYS_I2C_INIT_BOARD - u32 icr; - /* - * 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. - * - * disable I2C controller first, otherwhise it thinks we want to - * talk to the slave port... - */ - icr = readl(&base->icr); - writel(readl(&base->icr) & ~(ICR_SCLE | ICR_IUE), &base->icr); - - i2c_init_board(); - - writel(icr, &base->icr); -#endif + i2c_board_init(base); } /* |