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ENGR00119847 [MX23_BSP] Support polled read/write for debug UART

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Added the polled read and write functions for the debug UART port.

Signed-off-by: Patrick Turley <patrick.turley@freescale.com>
This commit is contained in:
Patrick Turley
2010-01-06 19:22:46 -06:00
committed by Matt Sealey
parent 672a18731a
commit c1104dfed8
1 changed files with 45 additions and 1 deletions
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46
drivers/serial/stmp-dbg.c
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@@ -7,7 +7,7 @@
* Copyright (C) 2000 Deep Blue Solutions Ltd.
* Modifications for STMP36XX Debug Serial (c) 2005 Sigmatel Inc
*
* Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
@@ -551,6 +551,46 @@ static int stmpdbg_verify_port(struct uart_port *port,
return ret;
}
#ifdef CONFIG_CONSOLE_POLL
/*
* Console polling routines for writing and reading from the UART while
* in an interrupt or debug context.
*/
static int stmpdbg_get_poll_char(struct uart_port *port)
{
struct uart_stmpdbg_port *uap = (struct uart_stmpdbg_port *)port;
unsigned int status;
/* Wait until a character arrives. */
do {
status = __raw_readl(uap->port.membase + UART01x_FR);
} while (status & UART01x_FR_RXFE);
/* Read the character and return it. */
return __raw_readl(uap->port.membase + UART01x_DR) & 0xff;
}
static void stmpdbg_put_poll_char(struct uart_port *port, unsigned char c)
{
struct uart_stmpdbg_port *uap = (struct uart_stmpdbg_port *)port;
/* Wait until the transmit FIFO is empty. */
while (!(__raw_readl(uap->port.membase + UART01x_FR) & UART011_FR_TXFE))
barrier();
/* Transmit the character. */
__raw_writel(c, uap->port.membase + UART01x_DR);
}
#endif /* CONFIG_CONSOLE_POLL */
static struct uart_ops stmpdbg_pops = {
.tx_empty = stmpdbg_tx_empty,
.set_mctrl = stmpdbg_set_mctrl,
@@ -568,6 +608,10 @@ static struct uart_ops stmpdbg_pops = {
.request_port = stmpdbg_request_port,
.config_port = stmpdbg_config_port,
.verify_port = stmpdbg_verify_port,
#ifdef CONFIG_CONSOLE_POLL
.poll_get_char = stmpdbg_get_poll_char,
.poll_put_char = stmpdbg_put_poll_char,
#endif
};
static struct uart_stmpdbg_port stmpdbg_ports[UART_NR] = {