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Commit 84b5ae15 authored by Jason Wessel's avatar Jason Wessel Committed by Ingo Molnar
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kgdb: kgdboc pl011 I/O module 



Implement the serial polling hooks for the pl011 uart for use with
kgdboc.

This patch was specifically tested on the ARM Versatile AB reference
platform.

[ mingo@elte.hu: minor cleanups. ]

Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent b4b8ac52

drivers/serial/amba-pl011.c

+30 −0
Original line number Diff line number Diff line
@@ -314,6 +314,32 @@ static void pl011_break_ctl(struct uart_port *port, int break_state) 
	spin_unlock_irqrestore(&uap->port.lock, flags);

}



#ifdef CONFIG_CONSOLE_POLL

static int pl010_get_poll_char(struct uart_port *port)

{

	struct uart_amba_port *uap = (struct uart_amba_port *)port;

	unsigned int status;



	do {

		status = readw(uap->port.membase + UART01x_FR);

	} while (status & UART01x_FR_RXFE);



	return readw(uap->port.membase + UART01x_DR);

}



static void pl010_put_poll_char(struct uart_port *port,

			 unsigned char ch)

{

	struct uart_amba_port *uap = (struct uart_amba_port *)port;



	while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF)

		barrier();



	writew(ch, uap->port.membase + UART01x_DR);

}



#endif /* CONFIG_CONSOLE_POLL */



static int pl011_startup(struct uart_port *port)

{

	struct uart_amba_port *uap = (struct uart_amba_port *)port;
@@ -572,6 +598,10 @@ static struct uart_ops amba_pl011_pops = { 
	.request_port	= pl010_request_port,

	.config_port	= pl010_config_port,

	.verify_port	= pl010_verify_port,

#ifdef CONFIG_CONSOLE_POLL

	.poll_get_char = pl010_get_poll_char,

	.poll_put_char = pl010_put_poll_char,

#endif

};



static struct uart_amba_port *amba_ports[UART_NR];