[SERIAL] Support Au1x00 8250 UARTs using the generic 8250 driver.

The offsets of the registers are in a different place, and
some parts cannot handle a full set of modem control signals.

Signed-off-by: Pantelis Antoniou <pantelis@embeddedalley.ocm>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 102 insertions, 0 deletions

diff --git a/drivers/serial/8250_au1x00.c b/drivers/serial/8250_au1x00.c
new file mode 100644
index 00000000000..06ae8fbcc94
--- /dev/null
+++ b/drivers/serial/8250_au1x00.c
@@ -0,0 +1,102 @@
+/*
+ * Serial Device Initialisation for Au1x00
+ *
+ * (C) Copyright Embedded Alley Solutions, Inc 2005
+ * Author: Pantelis Antoniou <pantelis@embeddedalley.com>
+ *
+ * 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.
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/serial_core.h>
+#include <linux/signal.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <linux/serial_8250.h>
+
+#include <asm/mach-au1x00/au1000.h>
+
+#include "8250.h"
+
+#define PORT(_base, _irq)				\
+	{						\
+		.iobase		= _base,		\
+		.membase	= (void __iomem *)_base,\
+		.mapbase	= _base,		\
+		.irq		= _irq,			\
+		.uartclk	= 0,	/* filled */	\
+		.regshift	= 2,			\
+		.iotype		= UPIO_AU,		\
+		.flags		= UPF_SKIP_TEST | 	\
+				  UPF_IOREMAP,		\
+	}
+
+static struct plat_serial8250_port au1x00_data[] = {
+#if defined(CONFIG_SOC_AU1000)
+	PORT(UART0_ADDR, AU1000_UART0_INT),
+	PORT(UART1_ADDR, AU1000_UART1_INT),
+	PORT(UART2_ADDR, AU1000_UART2_INT),
+	PORT(UART3_ADDR, AU1000_UART3_INT),
+#elif defined(CONFIG_SOC_AU1500)
+	PORT(UART0_ADDR, AU1500_UART0_INT),
+	PORT(UART3_ADDR, AU1500_UART3_INT),
+#elif defined(CONFIG_SOC_AU1100)
+	PORT(UART0_ADDR, AU1100_UART0_INT),
+	PORT(UART1_ADDR, AU1100_UART1_INT),
+	PORT(UART2_ADDR, AU1100_UART2_INT),
+	PORT(UART3_ADDR, AU1100_UART3_INT),
+#elif defined(CONFIG_SOC_AU1550)
+	PORT(UART0_ADDR, AU1550_UART0_INT),
+	PORT(UART1_ADDR, AU1550_UART1_INT),
+	PORT(UART2_ADDR, AU1550_UART2_INT),
+	PORT(UART3_ADDR, AU1550_UART3_INT),
+#elif defined(CONFIG_SOC_AU1200)
+	PORT(UART0_ADDR, AU1200_UART0_INT),
+	PORT(UART1_ADDR, AU1200_UART1_INT),
+#endif
+	{ },
+};
+
+static struct platform_device au1x00_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_AU1X00,
+	.dev			= {
+		.platform_data	= au1x00_data,
+	},
+};
+
+static int __init au1x00_init(void)
+{
+	int i;
+	unsigned int uartclk;
+
+	/* get uart clock */
+	uartclk = get_au1x00_uart_baud_base() * 16;
+
+	/* fill up uartclk */
+	for (i = 0; au1x00_data[i].flags ; i++)
+		au1x00_data[i].uartclk = uartclk;
+
+	return platform_device_register(&au1x00_device);
+}
+
+/* XXX: Yes, I know this doesn't yet work. */
+static void __exit au1x00_exit(void)
+{
+	platform_device_unregister(&au1x00_device);
+}
+
+module_init(au1x00_init);
+module_exit(au1x00_exit);
+
+MODULE_AUTHOR("Pantelis Antoniou <pantelis@embeddedalley.com>");
+MODULE_DESCRIPTION("8250 serial probe module for Au1x000 cards");
+MODULE_LICENSE("GPL");