Merge branch 'master'

1 files changed, 180 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
new file mode 100644
index 000000000000..f4df04fe1dd8
--- /dev/null
+++ b/arch/arm/mach-omap2/serial.c
@@ -0,0 +1,180 @@
+/*
+ * arch/arm/mach-omap/omap2/serial.c
+ *
+ * OMAP2 serial support.
+ *
+ * Copyright (C) 2005 Nokia Corporation
+ * Author: Paul Mundt <paul.mundt@nokia.com>
+ *
+ * Based off of arch/arm/mach-omap/omap1/serial.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/serial_8250.h>
+#include <linux/serial_reg.h>
+
+#include <asm/io.h>
+#include <asm/hardware/clock.h>
+
+#include <asm/arch/common.h>
+#include <asm/arch/board.h>
+
+static struct clk * uart1_ick = NULL;
+static struct clk * uart1_fck = NULL;
+static struct clk * uart2_ick = NULL;
+static struct clk * uart2_fck = NULL;
+static struct clk * uart3_ick = NULL;
+static struct clk * uart3_fck = NULL;
+
+static struct plat_serial8250_port serial_platform_data[] = {
+	{
+		.membase	= (char *)IO_ADDRESS(OMAP_UART1_BASE),
+		.mapbase	= (unsigned long)OMAP_UART1_BASE,
+		.irq		= 72,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= OMAP16XX_BASE_BAUD * 16,
+	}, {
+		.membase	= (char *)IO_ADDRESS(OMAP_UART2_BASE),
+		.mapbase	= (unsigned long)OMAP_UART2_BASE,
+		.irq		= 73,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= OMAP16XX_BASE_BAUD * 16,
+	}, {
+		.membase	= (char *)IO_ADDRESS(OMAP_UART3_BASE),
+		.mapbase	= (unsigned long)OMAP_UART3_BASE,
+		.irq		= 74,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= OMAP16XX_BASE_BAUD * 16,
+	}, {
+		.flags		= 0
+	}
+};
+
+static inline unsigned int serial_read_reg(struct plat_serial8250_port *up,
+					   int offset)
+{
+	offset <<= up->regshift;
+	return (unsigned int)__raw_readb(up->membase + offset);
+}
+
+static inline void serial_write_reg(struct plat_serial8250_port *p, int offset,
+				    int value)
+{
+	offset <<= p->regshift;
+	__raw_writeb(value, (unsigned long)(p->membase + offset));
+}
+
+/*
+ * Internal UARTs need to be initialized for the 8250 autoconfig to work
+ * properly. Note that the TX watermark initialization may not be needed
+ * once the 8250.c watermark handling code is merged.
+ */
+static inline void __init omap_serial_reset(struct plat_serial8250_port *p)
+{
+	serial_write_reg(p, UART_OMAP_MDR1, 0x07);
+	serial_write_reg(p, UART_OMAP_SCR, 0x08);
+	serial_write_reg(p, UART_OMAP_MDR1, 0x00);
+	serial_write_reg(p, UART_OMAP_SYSC, 0x01);
+}
+
+void __init omap_serial_init()
+{
+	int i;
+	const struct omap_uart_config *info;
+
+	/*
+	 * Make sure the serial ports are muxed on at this point.
+	 * You have to mux them off in device drivers later on
+	 * if not needed.
+	 */
+
+	info = omap_get_config(OMAP_TAG_UART,
+			       struct omap_uart_config);
+
+	if (info == NULL)
+		return;
+
+	for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
+		struct plat_serial8250_port *p = serial_platform_data + i;
+
+		if (!(info->enabled_uarts & (1 << i))) {
+			p->membase = 0;
+			p->mapbase = 0;
+			continue;
+		}
+
+		switch (i) {
+		case 0:
+			uart1_ick = clk_get(NULL, "uart1_ick");
+			if (IS_ERR(uart1_ick))
+				printk("Could not get uart1_ick\n");
+			else {
+				clk_use(uart1_ick);
+			}
+
+			uart1_fck = clk_get(NULL, "uart1_fck");
+			if (IS_ERR(uart1_fck))
+				printk("Could not get uart1_fck\n");
+			else {
+				clk_use(uart1_fck);
+			}
+			break;
+		case 1:
+			uart2_ick = clk_get(NULL, "uart2_ick");
+			if (IS_ERR(uart2_ick))
+				printk("Could not get uart2_ick\n");
+			else {
+				clk_use(uart2_ick);
+			}
+
+			uart2_fck = clk_get(NULL, "uart2_fck");
+			if (IS_ERR(uart2_fck))
+				printk("Could not get uart2_fck\n");
+			else {
+				clk_use(uart2_fck);
+			}
+			break;
+		case 2:
+			uart3_ick = clk_get(NULL, "uart3_ick");
+			if (IS_ERR(uart3_ick))
+				printk("Could not get uart3_ick\n");
+			else {
+				clk_use(uart3_ick);
+			}
+
+			uart3_fck = clk_get(NULL, "uart3_fck");
+			if (IS_ERR(uart3_fck))
+				printk("Could not get uart3_fck\n");
+			else {
+				clk_use(uart3_fck);
+			}
+			break;
+		}
+
+		omap_serial_reset(p);
+	}
+}
+
+static struct platform_device serial_device = {
+	.name			= "serial8250",
+	.id			= 0,
+	.dev			= {
+		.platform_data	= serial_platform_data,
+	},
+};
+
+static int __init omap_init(void)
+{
+	return platform_device_register(&serial_device);
+}
+arch_initcall(omap_init);