int mxs_serial_init(void)
{
/* Reset AURT */
mxs_auart_reset();
/* Mask interrupts */
REG_WR(MXS_UARTAPP_BASE, HW_UARTAPP_INTR, 0);
/* Set default baudrate */
mxs_serial_setbrg();
/*
* Disable RTS/CTS, enable Rx, Tx, UART */
REG_WR(MXS_UARTAPP_BASE, HW_UARTAPP_CTRL2_CLR,
BM_UARTAPP_CTRL2_RTSEN | BM_UARTAPP_CTRL2_CTSEN |
BM_UARTAPP_CTRL2_USE_LCR2);
REG_WR(MXS_UARTAPP_BASE, HW_UARTAPP_CTRL2_SET,
BM_UARTAPP_CTRL2_RXE | BM_UARTAPP_CTRL2_TXE |
BM_UARTAPP_CTRL2_UARTEN);
return 0;
}
static int __devinit mxs_auart_probe(struct platform_device *pdev)
{
struct mxs_auart_port *s;
u32 version;
int ret = 0;
struct resource *r;
s = kzalloc(sizeof(struct mxs_auart_port), GFP_KERNEL);
if (!s) {
ret = -ENOMEM;
goto out;
}
s->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(s->clk)) {
ret = PTR_ERR(s->clk);
goto out_free;
}
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r) {
ret = -ENXIO;
goto out_free_clk;
}
s->port.mapbase = r->start;
s->port.membase = ioremap(r->start, resource_size(r));
s->port.ops = &mxs_auart_ops;
s->port.iotype = UPIO_MEM;
s->port.line = pdev->id < 0 ? 0 : pdev->id;
s->port.fifosize = 16;
s->port.uartclk = clk_get_rate(s->clk);
s->port.type = PORT_IMX;
s->port.dev = s->dev = get_device(&pdev->dev);
s->flags = 0;
s->ctrl = 0;
s->irq = platform_get_irq(pdev, 0);
s->port.irq = s->irq;
ret = request_irq(s->irq, mxs_auart_irq_handle, 0, dev_name(&pdev->dev), s);
if (ret)
goto out_free_clk;
platform_set_drvdata(pdev, s);
auart_port[pdev->id] = s;
mxs_auart_reset(&s->port);
ret = uart_add_one_port(&auart_driver, &s->port);
if (ret)
goto out_free_irq;
version = readl(s->port.membase + AUART_VERSION);
dev_info(&pdev->dev, "Found APPUART %d.%d.%d\n",
(version >> 24) & 0xff,
(version >> 16) & 0xff, version & 0xffff);
return 0;
out_free_irq:
auart_port[pdev->id] = NULL;
free_irq(s->irq, s);
out_free_clk:
clk_put(s->clk);
out_free:
kfree(s);
out:
return ret;
}