[U-Boot] [PATCH] [UPDATE #2] Merged serial_pl010.c and serial_pl011.c.
Andreas Engel
andreas.engel at ericsson.com
Mon Sep 8 10:17:31 CEST 2008
They only differ in the init function.
This also adds the missing watchdog support for the PL011.
Signed-off-by: Andreas Engel <andreas.engel at ericsson.com>
---
Updated patch to the current git head as of today.
drivers/serial/Makefile | 3 +-
drivers/serial/serial_pl011.c | 161 ---------------------
drivers/serial/{serial_pl010.c => serial_pl01x.c} | 83 +++++++++--
drivers/serial/{serial_pl011.h => serial_pl01x.h} | 0
4 files changed, 69 insertions(+), 178 deletions(-)
delete mode 100644 drivers/serial/serial_pl011.c
rename drivers/serial/{serial_pl010.c => serial_pl01x.c} (66%)
rename drivers/serial/{serial_pl011.h => serial_pl01x.h} (100%)
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index f30014d..3cc1999 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -33,8 +33,7 @@ COBJS-$(CONFIG_DRIVER_S3C4510_UART) += s3c4510b_uart.o
COBJS-$(CONFIG_S3C64XX) += s3c64xx.o
COBJS-y += serial.o
COBJS-$(CONFIG_MAX3100_SERIAL) += serial_max3100.o
-COBJS-y += serial_pl010.o
-COBJS-y += serial_pl011.o
+COBJS-y += serial_pl01x.o
COBJS-$(CONFIG_XILINX_UARTLITE) += serial_xuartlite.o
COBJS-$(CONFIG_SCIF_CONSOLE) += serial_sh.o
COBJS-$(CONFIG_USB_TTY) += usbtty.o
diff --git a/drivers/serial/serial_pl011.c b/drivers/serial/serial_pl011.c
deleted file mode 100644
index 4d35fe5..0000000
--- a/drivers/serial/serial_pl011.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/*
- * (C) Copyright 2000
- * Rob Taylor, Flying Pig Systems. robt at flyingpig.com.
- *
- * (C) Copyright 2004
- * ARM Ltd.
- * Philippe Robin, <philippe.robin at arm.com>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/* Simple U-Boot driver for the PrimeCell PL011 UARTs on the IntegratorCP */
-/* Should be fairly simple to make it work with the PL010 as well */
-
-#include <common.h>
-
-#ifdef CFG_PL011_SERIAL
-
-#include "serial_pl011.h"
-
-#define IO_WRITE(addr, val) (*(volatile unsigned int *)(addr) = (val))
-#define IO_READ(addr) (*(volatile unsigned int *)(addr))
-
-/*
- * IntegratorCP has two UARTs, use the first one, at 38400-8-N-1
- * Versatile PB has four UARTs.
- */
-
-#define CONSOLE_PORT CONFIG_CONS_INDEX
-#define baudRate CONFIG_BAUDRATE
-static volatile unsigned char *const port[] = CONFIG_PL01x_PORTS;
-#define NUM_PORTS (sizeof(port)/sizeof(port[0]))
-
-static void pl011_putc (int portnum, char c);
-static int pl011_getc (int portnum);
-static int pl011_tstc (int portnum);
-
-
-int serial_init (void)
-{
- unsigned int temp;
- unsigned int divider;
- unsigned int remainder;
- unsigned int fraction;
-
- /*
- ** First, disable everything.
- */
- IO_WRITE (port[CONSOLE_PORT] + UART_PL011_CR, 0x0);
-
- /*
- ** Set baud rate
- **
- ** IBRD = UART_CLK / (16 * BAUD_RATE)
- ** FBRD = ROUND((64 * MOD(UART_CLK,(16 * BAUD_RATE))) / (16 * BAUD_RATE))
- */
- temp = 16 * baudRate;
- divider = CONFIG_PL011_CLOCK / temp;
- remainder = CONFIG_PL011_CLOCK % temp;
- temp = (8 * remainder) / baudRate;
- fraction = (temp >> 1) + (temp & 1);
-
- IO_WRITE (port[CONSOLE_PORT] + UART_PL011_IBRD, divider);
- IO_WRITE (port[CONSOLE_PORT] + UART_PL011_FBRD, fraction);
-
- /*
- ** Set the UART to be 8 bits, 1 stop bit, no parity, fifo enabled.
- */
- IO_WRITE (port[CONSOLE_PORT] + UART_PL011_LCRH,
- (UART_PL011_LCRH_WLEN_8 | UART_PL011_LCRH_FEN));
-
- /*
- ** Finally, enable the UART
- */
- IO_WRITE (port[CONSOLE_PORT] + UART_PL011_CR,
- (UART_PL011_CR_UARTEN | UART_PL011_CR_TXE |
- UART_PL011_CR_RXE));
-
- return 0;
-}
-
-void serial_putc (const char c)
-{
- if (c == '\n')
- pl011_putc (CONSOLE_PORT, '\r');
-
- pl011_putc (CONSOLE_PORT, c);
-}
-
-void serial_puts (const char *s)
-{
- while (*s) {
- serial_putc (*s++);
- }
-}
-
-int serial_getc (void)
-{
- return pl011_getc (CONSOLE_PORT);
-}
-
-int serial_tstc (void)
-{
- return pl011_tstc (CONSOLE_PORT);
-}
-
-void serial_setbrg (void)
-{
-}
-
-static void pl011_putc (int portnum, char c)
-{
- /* Wait until there is space in the FIFO */
- while (IO_READ (port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_TXFF);
-
- /* Send the character */
- IO_WRITE (port[portnum] + UART_PL01x_DR, c);
-}
-
-static int pl011_getc (int portnum)
-{
- unsigned int data;
-
- /* Wait until there is data in the FIFO */
- while (IO_READ (port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_RXFE);
-
- data = IO_READ (port[portnum] + UART_PL01x_DR);
-
- /* Check for an error flag */
- if (data & 0xFFFFFF00) {
- /* Clear the error */
- IO_WRITE (port[portnum] + UART_PL01x_ECR, 0xFFFFFFFF);
- return -1;
- }
-
- return (int) data;
-}
-
-static int pl011_tstc (int portnum)
-{
- return !(IO_READ (port[portnum] + UART_PL01x_FR) &
- UART_PL01x_FR_RXFE);
-}
-
-#endif
diff --git a/drivers/serial/serial_pl010.c b/drivers/serial/serial_pl01x.c
similarity index 66%
rename from drivers/serial/serial_pl010.c
rename to drivers/serial/serial_pl01x.c
index 134ed09..d0497ec 100644
--- a/drivers/serial/serial_pl010.c
+++ b/drivers/serial/serial_pl01x.c
@@ -31,24 +31,28 @@
#include <common.h>
#include <watchdog.h>
-#ifdef CFG_PL010_SERIAL
+#if defined(CFG_PL010_SERIAL) || defined(CFG_PL011_SERIAL)
-#include "serial_pl011.h"
+#include "serial_pl01x.h"
#define IO_WRITE(addr, val) (*(volatile unsigned int *)(addr) = (val))
#define IO_READ(addr) (*(volatile unsigned int *)(addr))
-/* Integrator AP has two UARTs, we use the first one, at 38400-8-N-1 */
+/*
+ * Integrator AP has two UARTs, we use the first one, at 38400-8-N-1
+ * Integrator CP has two UARTs, use the first one, at 38400-8-N-1
+ * Versatile PB has four UARTs.
+ */
#define CONSOLE_PORT CONFIG_CONS_INDEX
#define baudRate CONFIG_BAUDRATE
static volatile unsigned char *const port[] = CONFIG_PL01x_PORTS;
#define NUM_PORTS (sizeof(port)/sizeof(port[0]))
+static void pl01x_putc (int portnum, char c);
+static int pl01x_getc (int portnum);
+static int pl01x_tstc (int portnum);
-static void pl010_putc (int portnum, char c);
-static int pl010_getc (int portnum);
-static int pl010_tstc (int portnum);
-
+#ifdef CFG_PL010_SERIAL
int serial_init (void)
{
@@ -103,15 +107,64 @@ int serial_init (void)
*/
IO_WRITE (port[CONSOLE_PORT] + UART_PL010_CR, (UART_PL010_CR_UARTEN));
- return (0);
+ return 0;
}
+#endif /* CFG_PL010_SERIAL */
+
+#ifdef CFG_PL011_SERIAL
+
+int serial_init (void)
+{
+ unsigned int temp;
+ unsigned int divider;
+ unsigned int remainder;
+ unsigned int fraction;
+
+ /*
+ ** First, disable everything.
+ */
+ IO_WRITE (port[CONSOLE_PORT] + UART_PL011_CR, 0x0);
+
+ /*
+ ** Set baud rate
+ **
+ ** IBRD = UART_CLK / (16 * BAUD_RATE)
+ ** FBRD = ROUND((64 * MOD(UART_CLK,(16 * BAUD_RATE))) / (16 * BAUD_RATE))
+ */
+ temp = 16 * baudRate;
+ divider = CONFIG_PL011_CLOCK / temp;
+ remainder = CONFIG_PL011_CLOCK % temp;
+ temp = (8 * remainder) / baudRate;
+ fraction = (temp >> 1) + (temp & 1);
+
+ IO_WRITE (port[CONSOLE_PORT] + UART_PL011_IBRD, divider);
+ IO_WRITE (port[CONSOLE_PORT] + UART_PL011_FBRD, fraction);
+
+ /*
+ ** Set the UART to be 8 bits, 1 stop bit, no parity, fifo enabled.
+ */
+ IO_WRITE (port[CONSOLE_PORT] + UART_PL011_LCRH,
+ (UART_PL011_LCRH_WLEN_8 | UART_PL011_LCRH_FEN));
+
+ /*
+ ** Finally, enable the UART
+ */
+ IO_WRITE (port[CONSOLE_PORT] + UART_PL011_CR,
+ (UART_PL011_CR_UARTEN | UART_PL011_CR_TXE |
+ UART_PL011_CR_RXE));
+
+ return 0;
+}
+
+#endif /* CFG_PL011_SERIAL */
+
void serial_putc (const char c)
{
if (c == '\n')
- pl010_putc (CONSOLE_PORT, '\r');
+ pl01x_putc (CONSOLE_PORT, '\r');
- pl010_putc (CONSOLE_PORT, c);
+ pl01x_putc (CONSOLE_PORT, c);
}
void serial_puts (const char *s)
@@ -123,19 +176,19 @@ void serial_puts (const char *s)
int serial_getc (void)
{
- return pl010_getc (CONSOLE_PORT);
+ return pl01x_getc (CONSOLE_PORT);
}
int serial_tstc (void)
{
- return pl010_tstc (CONSOLE_PORT);
+ return pl01x_tstc (CONSOLE_PORT);
}
void serial_setbrg (void)
{
}
-static void pl010_putc (int portnum, char c)
+static void pl01x_putc (int portnum, char c)
{
/* Wait until there is space in the FIFO */
while (IO_READ (port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_TXFF)
@@ -145,7 +198,7 @@ static void pl010_putc (int portnum, char c)
IO_WRITE (port[portnum] + UART_PL01x_DR, c);
}
-static int pl010_getc (int portnum)
+static int pl01x_getc (int portnum)
{
unsigned int data;
@@ -165,7 +218,7 @@ static int pl010_getc (int portnum)
return (int) data;
}
-static int pl010_tstc (int portnum)
+static int pl01x_tstc (int portnum)
{
WATCHDOG_RESET();
return !(IO_READ (port[portnum] + UART_PL01x_FR) &
diff --git a/drivers/serial/serial_pl011.h b/drivers/serial/serial_pl01x.h
similarity index 100%
rename from drivers/serial/serial_pl011.h
rename to drivers/serial/serial_pl01x.h
--
1.5.6.5
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