static enum uart yam_check_uart(unsigned int iobase)
{
unsigned char b1, b2, b3;
enum uart u;
enum uart uart_tab[] =
{c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A};
b1 = inb(MCR(iobase));
outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
b2 = inb(MSR(iobase));
outb(0x1a, MCR(iobase));
b3 = inb(MSR(iobase)) & 0xf0;
outb(b1, MCR(iobase)); /* restore old values */
outb(b2, MSR(iobase));
if (b3 != 0x90)
return c_uart_unknown;
inb(RBR(iobase));
inb(RBR(iobase));
outb(0x01, FCR(iobase)); /* enable FIFOs */
u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
if (u == c_uart_16450) {
outb(0x5a, SCR(iobase));
b1 = inb(SCR(iobase));
outb(0xa5, SCR(iobase));
b2 = inb(SCR(iobase));
if ((b1 != 0x5a) || (b2 != 0xa5))
u = c_uart_8250;
}
return u;
}
void serial_setbrg (void)
{
unsigned int quot = 0;
int uart = CONFIG_SYS_IXP425_CONSOLE;
if ((gd->baudrate <= SERIAL_CLOCK) && (SERIAL_CLOCK % gd->baudrate == 0))
quot = SERIAL_CLOCK / gd->baudrate;
else
hang ();
IER(uart) = 0; /* Disable for now */
FCR(uart) = 0; /* No fifos enabled */
/* set baud rate */
LCR(uart) = LCR_WLS0 | LCR_WLS1 | LCR_DLAB;
DLL(uart) = quot & 0xff;
DLH(uart) = quot >> 8;
LCR(uart) = LCR_WLS0 | LCR_WLS1;
#ifdef CONFIG_SERIAL_RTS_ACTIVE
MCR(uart) = MCR_RTS; /* set RTS active */
#else
MCR(uart) = 0; /* set RTS inactive */
#endif
IER(uart) = IER_UUE;
}
static int do_requests(int baseport, int irq, int index, int minor)
{
int err;
atomic_set(&uart[index].read_ready, 0);
atomic_set(&uart[index].write_ready, 0);
uart[index].read = 0;
uart[index].write = 0;
uart[index].base_port = baseport;
cdev_init(&uart[index].cdev, &serial_fops);
init_waitqueue_head(&uart[index].wq_reads);
init_waitqueue_head(&uart[index].wq_writes);
if ((err = cdev_add(&uart[index].cdev, MKDEV(major, minor), 1)))
{
//printk(LOG_LEVEL "cdev_init %d failed", minor);
return err;
}
if (request_region(baseport, COM_PORTS, MODULE_NAME) == NULL)
{
//printk(LOG_LEVEL "request_region failed for COM1");
return -EINVAL;
}
err = request_irq(irq, serial_interrupt_handle, IRQF_SHARED, MODULE_NAME,
&uart[index]);
if (err)
{
//printk(LOG_LEVEL "ERROR: %s: error %d\n", "request_irq", err);
return err;
}
// Enable FIFO cu 14 octeti
outb(0xc7, FCR(baseport));
// Enable interrupts
outb(0x08, MCR(baseport));
outb(0x01, IER(baseport));
//printk(LOG_LEVEL "index %d, baseport %d, irq %d, minor %d", index, baseport, irq, minor);
return 0;
}
static void yam_set_uart(struct net_device *dev)
{
struct yam_port *yp = netdev_priv(dev);
int divisor = 115200 / yp->baudrate;
outb(0, IER(dev->base_addr));
outb(LCR_DLAB | LCR_BIT8, LCR(dev->base_addr));
outb(divisor, DLL(dev->base_addr));
outb(0, DLM(dev->base_addr));
outb(LCR_BIT8, LCR(dev->base_addr));
outb(PTT_OFF, MCR(dev->base_addr));
outb(0x00, FCR(dev->base_addr));
/* Flush pending irq */
inb(RBR(dev->base_addr));
inb(MSR(dev->base_addr));
/* Enable rx irq */
outb(ENABLE_RTXINT, IER(dev->base_addr));
}
