int serial8250_find_port_for_earlycon(void)
{
struct early_serial8250_device *device = &early_device;
struct uart_port *port = &device->port;
int line;
int ret;
if (!device->port.membase && !device->port.iobase)
return -ENODEV;
line = serial8250_find_port(port);
if (line < 0)
return -ENODEV;
ret = update_console_cmdline("uart", 8250,
"ttyS", line, device->options);
if (ret < 0)
ret = update_console_cmdline("uart", 0,
"ttyS", line, device->options);
return ret;
}
int serial8250_find_port_for_earlycon(void)
{
struct earlycon_device *device = early_device;
struct uart_port *port = device ? &device->port : NULL;
int line;
int ret;
if (!port || (!port->membase && !port->iobase))
return -ENODEV;
line = serial8250_find_port(port);
if (line < 0)
return -ENODEV;
ret = update_console_cmdline("uart", 8250,
"ttyS", line, device->options);
if (ret < 0)
ret = update_console_cmdline("uart", 0,
"ttyS", line, device->options);
return ret;
}
static int __init pnx_pc_detection_init(void)
{
struct uart_port port;
int baud = 115200;
memset(&port, 0, sizeof(port));
/* configure UART port to 115200n8 */
port.iotype = UPIO_MEM;
port.uartclk = BASE_BAUD;
port.mapbase = UART1_BASE_ADDR;
port.membase = (void __iomem*)UART1_BASE;
port.regshift = 2;
port.irq = IRQ_UART1;
port.line = 0;
/* enable UART IP clock*/
serial8250_enable_clock(&port);
early_serial_setup(&port);
init_port(&port, baud);
/* send request code and check synchronization byte */
pnx_pctool_status = pnx_pctooldetect(&port);
/* disable UART IP clock*/
serial8250_disable_clock(&port);
/* if pc tool detected disable console over uart */
if(pnx_pctool_status != 0xFF)
{
pcdetect_serial8250_write(&port,&pnx_pctool_status, 1);
update_console_cmdline("ttyS", 0, "tty", 0, NULL);
// MJA patch
tatonuart=0;
}
return 0;
}
