1 files changed, 96 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/serial.c b/arch/arm/mach-davinci/serial.c
new file mode 100644
index 000000000000..8368c93c788d
--- /dev/null
+++ b/arch/arm/mach-davinci/serial.c
@@ -0,0 +1,96 @@
+/*
+ * TI DaVinci serial driver
+ *
+ * Copyright (C) 2006 Texas Instruments.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/serial_8250.h>
+#include <linux/serial_reg.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/hardware.h>
+#include <asm/arch/serial.h>
+#include <asm/arch/irqs.h>
+
+#define UART_DAVINCI_PWREMU 0x0c
+
+static inline unsigned int davinci_serial_in(struct plat_serial8250_port *up,
+					  int offset)
+{
+	offset <<= up->regshift;
+	return (unsigned int)__raw_readb(up->membase + offset);
+}
+
+static inline void davinci_serial_outp(struct plat_serial8250_port *p,
+				       int offset, int value)
+{
+	offset <<= p->regshift;
+	__raw_writeb(value, p->membase + offset);
+}
+
+static struct plat_serial8250_port serial_platform_data[] = {
+	{
+		.membase	= (char *)IO_ADDRESS(DAVINCI_UART0_BASE),
+		.mapbase	= (unsigned long)DAVINCI_UART0_BASE,
+		.irq		= IRQ_UARTINT0,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= 27000000,
+	},
+	{
+		.flags		= 0
+	},
+};
+
+static struct platform_device serial_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev			= {
+		.platform_data	= serial_platform_data,
+	},
+};
+
+static void __init davinci_serial_reset(struct plat_serial8250_port *p)
+{
+	/* reset both transmitter and receiver: bits 14,13 = UTRST, URRST */
+	unsigned int pwremu = 0;
+
+	davinci_serial_outp(p, UART_IER, 0);  /* disable all interrupts */
+
+	davinci_serial_outp(p, UART_DAVINCI_PWREMU, pwremu);
+	mdelay(10);
+
+	pwremu |= (0x3 << 13);
+	pwremu |= 0x1;
+	davinci_serial_outp(p, UART_DAVINCI_PWREMU, pwremu);
+}
+
+static int __init davinci_init(void)
+{
+	davinci_serial_reset(&serial_platform_data[0]);
+	return platform_device_register(&serial_device);
+}
+
+arch_initcall(davinci_init);