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);