int davinci_i2c_init(char *bus_name)
{
struct rt_i2c_bus_device *bus;
struct davinci_i2c_dev *dev;
int r;
bus = rt_malloc(sizeof(struct rt_i2c_bus_device));
if (bus == RT_NULL)
{
rt_kprintf("rt_malloc failed\n");
return -RT_ENOMEM;
}
rt_memset((void *)bus, 0, sizeof(struct rt_i2c_bus_device));
bus->ops = &bus_ops;
bus->timeout = DAVINCI_I2C_TIMEOUT;
dev = rt_malloc(sizeof(struct davinci_i2c_dev));
if (!dev)
{
r = -RT_ENOMEM;
goto err;
}
rt_memset((void *)dev, 0, sizeof(struct davinci_i2c_dev));
rt_sem_init(&dev->completion, "i2c_ack", 0, RT_IPC_FLAG_FIFO);
dev->irq = IRQ_I2C;
dev->clk = clk_get("I2CCLK");
if (dev->clk == RT_NULL) {
r = -RT_ERROR;
goto err1;
}
psc_change_state(DAVINCI_DM365_LPSC_I2C, 3);
dev->base = DAVINCI_I2C_BASE;
dev->bus_freq = 100;
dev->bus_delay = 0;
bus->priv = dev;
i2c_davinci_init(dev);
rt_hw_interrupt_install(dev->irq, i2c_davinci_isr, (void *)dev, "I2C");
rt_hw_interrupt_umask(dev->irq);
return rt_i2c_bus_device_register(bus, bus_name);
err1:
rt_free(dev);
err:
rt_free(bus);
return r;
}
/**
* This function will init dm365 board
*/
void rt_hw_board_init()
{
psc_change_state(DAVINCI_DM365_LPSC_TIMER0, 3);
psc_change_state(DAVINCI_DM365_LPSC_TIMER1, 3);
/* initialize the system clock */
//rt_hw_clock_init();
davinci_clk_init();
/* initialize uart */
rt_hw_uart_init();
#ifdef RT_USING_CONSOLE
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
/* initialize mmu */
rt_hw_mmu_init(dm365_mem_desc, sizeof(dm365_mem_desc)/sizeof(dm365_mem_desc[0]));
/* initialize timer0 */
rt_hw_timer_init();
}
