* Patch by Philippe Robin, 09 Mar 2004:

  Added ARM Integrator AP, CP and Versatile PB926EJ-S Reference
  Platform support.

* Patch by Masami Komiya, 08 Mar 2004:
  Don't overwrite server IP address or boot file name
  when the boot server does not return values

* Patch by listmember@orkun.us, 5 Mar 2004:
  Removed compile time restriction on CFG_I2C_SPEED for DS1338 RTC

1 files changed, 175 insertions, 0 deletions

diff --git a/drivers/serial_pl011.c b/drivers/serial_pl011.c
new file mode 100644
index 0000000..60fcc91
--- /dev/null
+++ b/drivers/serial_pl011.c
@@ -0,0 +1,175 @@
+/*
+ * (C) Copyright 2000
+ * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
+ *
+ * (C) Copyright 2004
+ * ARM Ltd.
+ * Philippe Robin, <philippe.robin@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 NUM_PORTS 2
+#define CONSOLE_PORT CONFIG_CONS_INDEX
+#define baudRate CONFIG_BAUDRATE
+static volatile unsigned char * const port[NUM_PORTS] = {(void*)(CFG_SERIAL0),
+                                                         (void*)(CFG_SERIAL1)};
+
+
+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))
+    */
+#ifdef CONFIG_VERSATILE
+    temp      = 16 * baudRate;
+    divider   = 24000000 / temp;
+    remainder = 24000000 % temp;
+    temp      = (8 * remainder) / baudRate;
+    fraction  = (temp >> 1) + (temp & 1);
+#endif
+#ifdef CONFIG_INTEGRATOR
+    temp      = 16 * baudRate;
+    divider   = 14745600 / temp;
+    remainder = 14745600 % temp;
+    temp      = (8 * remainder) / baudRate;
+    fraction  = (temp >> 1) + (temp & 1);
+#endif
+ 
+    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