40 static unsigned int __init serial8250_early_in(struct uart_port *port, int offset)  in serial8250_early_in()  argument
42 	switch (port->iotype) {  in serial8250_early_in()
44 		return readb(port->membase + offset);  in serial8250_early_in()
46 		return readl(port->membase + (offset << 2));  in serial8250_early_in()
48 		return ioread32be(port->membase + (offset << 2));  in serial8250_early_in()
50 		return inb(port->iobase + offset);  in serial8250_early_in()
56 static void __init serial8250_early_out(struct uart_port *port, int offset, int value)  in serial8250_early_out()  argument
58 	switch (port->iotype) {  in serial8250_early_out()
60 		writeb(value, port->membase + offset);  in serial8250_early_out()
63 		writel(value, port->membase + (offset << 2));  in serial8250_early_out()
66 		iowrite32be(value, port->membase + (offset << 2));  in serial8250_early_out()
69 		outb(value, port->iobase + offset);  in serial8250_early_out()
76 static void __init wait_for_xmitr(struct uart_port *port)  in wait_for_xmitr()  argument
81 		status = serial8250_early_in(port, UART_LSR);  in wait_for_xmitr()
88 static void __init serial_putc(struct uart_port *port, int c)  in serial_putc()  argument
90 	wait_for_xmitr(port);  in serial_putc()
91 	serial8250_early_out(port, UART_TX, c);  in serial_putc()
98 	struct uart_port *port = &device->port;  in early_serial8250_write()  local
102 	ier = serial8250_early_in(port, UART_IER);  in early_serial8250_write()
104 		serial8250_early_out(port, UART_IER, ier & UART_IER_UUE);  in early_serial8250_write()
106 	uart_console_write(port, s, count, serial_putc);  in early_serial8250_write()
109 	wait_for_xmitr(port);  in early_serial8250_write()
112 		serial8250_early_out(port, UART_IER, ier);  in early_serial8250_write()
117 	struct uart_port *port = &device->port;  in init_port()  local
122 	serial8250_early_out(port, UART_LCR, 0x3);	/* 8n1 */  in init_port()
123 	ier = serial8250_early_in(port, UART_IER);  in init_port()
124 	serial8250_early_out(port, UART_IER, ier & UART_IER_UUE); /* no interrupt */  in init_port()
125 	serial8250_early_out(port, UART_FCR, 0);	/* no fifo */  in init_port()
126 	serial8250_early_out(port, UART_MCR, 0x3);	/* DTR + RTS */  in init_port()
128 	divisor = DIV_ROUND_CLOSEST(port->uartclk, 16 * device->baud);  in init_port()
129 	c = serial8250_early_in(port, UART_LCR);  in init_port()
130 	serial8250_early_out(port, UART_LCR, c | UART_LCR_DLAB);  in init_port()
131 	serial8250_early_out(port, UART_DLL, divisor & 0xff);  in init_port()
132 	serial8250_early_out(port, UART_DLM, (divisor >> 8) & 0xff);  in init_port()
133 	serial8250_early_out(port, UART_LCR, c & ~UART_LCR_DLAB);  in init_port()
139 	if (!(device->port.membase || device->port.iobase))  in early_serial8250_setup()
143 		struct uart_port *port = &device->port;  in early_serial8250_setup()  local
147 		ier = serial8250_early_in(port, UART_IER);  in early_serial8250_setup()
148 		serial8250_early_out(port, UART_IER, ier & UART_IER_UUE);  in early_serial8250_setup()