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From eb753556815cde046e35d206880a507eb052ac4e Mon Sep 17 00:00:00 2001
From: Matthieu Crapet <mcrapet@gmail.com>
Date: Sun, 17 Jan 2010 17:52:13 +0100
Subject: [PATCH] ts72xx_ts_ser1
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Petr Štetiar <ynezz@true.cz>
---
drivers/serial/8250_ts_ser1.c | 150 +++++++++++++++++++++++++++++++++++++++++
drivers/serial/Kconfig | 17 +++++
drivers/serial/Makefile | 1 +
3 files changed, 168 insertions(+), 0 deletions(-)
create mode 100644 drivers/serial/8250_ts_ser1.c
diff --git a/drivers/serial/8250_ts_ser1.c b/drivers/serial/8250_ts_ser1.c
new file mode 100644
index 0000000..a3c95d4
--- /dev/null
+++ b/drivers/serial/8250_ts_ser1.c
@@ -0,0 +1,150 @@
+/*
+ * linux/drivers/serial/8250_ts_ser1.c
+ * Technologic Systems TS-SER1 support.
+ *
+ * (c) Copyright 2006-2008 Matthieu Crapet <mcrapet@gmail.com>
+ * Data taken from include/asm-i386/serial.h
+ *
+ * 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.
+ *
+ * Pin Number:
+ * 1 DCD
+ * 2 Receive data
+ * 3 Trasmit data
+ * 4 DTR
+ * 5 Signal Ground
+ * 6 DSR
+ * 7 RTS
+ * 8 CTS
+ * 9 RI
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/serial_8250.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <mach/hardware.h>
+#include <mach/ts72xx.h>
+#include <mach/gpio.h>
+
+
+#define TS72XX_SER1_IO_PHYS_BASE (TS72XX_PC104_8BIT_IO_PHYS_BASE)
+#define TS72XX_SER1_IO_SIZE (TS72XX_PC104_8BIT_IO_SIZE)
+
+#define TS_SER1_PORT_COM3 0x3E8
+#define TS_SER1_PORT_COM4 0x2E8
+#define TS_SER1_PORT_COM5 0x3A8
+
+/* Value to write in 16550A scratch register */
+#define MARKER_BYTE 0xAA /* or 0x55 */
+
+#define PORT(_base,_irq) \
+ { \
+ .iobase = _base, \
+ .membase = (void __iomem *)0, \
+ .irq = _irq, \
+ .uartclk = 1843200, \
+ .iotype = UPIO_PORT, \
+ .flags = UPF_BOOT_AUTOCONF, \
+ }
+// Note: IRQ can be shared (see CONFIG_SERIAL_8250_SHARE_IRQ)
+
+
+static struct plat_serial8250_port ts72xx_ser1_data_com3[] = {
+ PORT(TS_SER1_PORT_COM3, 0),
+ { },
+};
+
+static struct plat_serial8250_port ts72xx_ser1_data_com4[] = {
+ PORT(TS_SER1_PORT_COM4, 0),
+ { },
+};
+
+static struct plat_serial8250_port ts72xx_ser1_data_com5[] = {
+ PORT(TS_SER1_PORT_COM5, 0),
+ { },
+};
+
+static struct platform_device ts72xx_ser1_device = {
+ .name = "serial8250",
+ .id = 0,
+ .dev = {
+ .platform_data = ts72xx_ser1_data_com3,
+ },
+};
+
+static void __iomem *iomem;
+
+
+static int __init ts_ser1_init(void)
+{
+ static struct plat_serial8250_port *comX = NULL;
+ int n = 0; // COM number as printed on TS-SER1 pcb
+
+ iomem = ioremap(TS72XX_SER1_IO_PHYS_BASE, TS72XX_SER1_IO_SIZE);
+
+ if (iomem != NULL) {
+ __raw_writeb(MARKER_BYTE, iomem + TS_SER1_PORT_COM3 + 7);
+ if (__raw_readb(iomem + TS_SER1_PORT_COM3 + 7) == MARKER_BYTE) {
+ comX = ts72xx_ser1_data_com3;
+ n = 3;
+ } else {
+ __raw_writeb(MARKER_BYTE, iomem + TS_SER1_PORT_COM4 + 7);
+ if (__raw_readb(iomem + TS_SER1_PORT_COM4 + 7) == MARKER_BYTE) {
+ comX = ts72xx_ser1_data_com4;
+ n = 4;
+ } else {
+ __raw_writeb(MARKER_BYTE, iomem + TS_SER1_PORT_COM5 + 7);
+ if (__raw_readb(iomem + TS_SER1_PORT_COM5 + 7) == MARKER_BYTE) {
+ comX = ts72xx_ser1_data_com5;
+ n = 5;
+ }
+ }
+ }
+
+ if (comX) {
+ #if CONFIG_SERIAL_8250_TS_SER1_IRQ == 5
+ gpio_direction_input(EP93XX_GPIO_LINE_F(3));
+ comX->irq = gpio_to_irq(EP93XX_GPIO_LINE_F(3)); // 83
+ set_irq_type(comX->irq, IRQ_TYPE_EDGE_RISING);
+ #elif CONFIG_SERIAL_8250_TS_SER1_IRQ == 6
+ comX->irq = IRQ_EP93XX_EXT1;
+ #elif CONFIG_SERIAL_8250_TS_SER1_IRQ == 7
+ comX->irq = IRQ_EP93XX_EXT3;
+ #else
+ comX->irq = IRQ_EP93XX_EXT3;
+ #endif
+
+ comX->iobase += (unsigned long)iomem; // virtual address
+ }
+
+ ts72xx_ser1_device.id = n;
+ ts72xx_ser1_device.dev.platform_data = comX;
+ }
+
+ return ((comX == NULL) ? -ENODEV :
+ platform_device_register(&ts72xx_ser1_device));
+}
+
+static void __exit ts_ser1_exit(void)
+{
+ iounmap(iomem);
+ platform_device_unregister(&ts72xx_ser1_device);
+}
+
+module_init(ts_ser1_init);
+module_exit(ts_ser1_exit);
+
+MODULE_AUTHOR("Matthieu Crapet <mcrapet@gmail.com>");
+MODULE_DESCRIPTION("8250 serial probe module for TS-SER1 (TS-72xx)");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.3");
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index e522572..0eeca06 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -275,6 +275,23 @@ config SERIAL_8250_RM9K
port hardware found on MIPS RM9122 and similar processors.
If unsure, say N.
+config SERIAL_8250_TS_SER1
+ tristate "Support TS-SER1 (for TS-72XX SBC)"
+ depends on SERIAL_8250 != n && MACH_TS72XX
+ help
+ Say Y here if you have a TS-SER1 PC/104 peripheral.
+ COM number will be configured automaticaly.
+
+ To compile this driver as a module, choose M here: the module
+ will be called 8250_ts_ser1.
+
+config SERIAL_8250_TS_SER1_IRQ
+ int "Selected IRQ (5, 6 or 7)"
+ depends on SERIAL_8250_TS_SER1
+ default "5"
+ help
+ Enter jumper IRQ configuration
+
comment "Non-8250 serial port support"
config SERIAL_AMBA_PL010
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index d21d5dd..f8fdb4f 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_SERIAL_8250_BOCA) += 8250_boca.o
obj-$(CONFIG_SERIAL_8250_EXAR_ST16C554) += 8250_exar_st16c554.o
obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o
obj-$(CONFIG_SERIAL_8250_MCA) += 8250_mca.o
+obj-$(CONFIG_SERIAL_8250_TS_SER1) += 8250_ts_ser1.o
obj-$(CONFIG_SERIAL_AMBA_PL010) += amba-pl010.o
obj-$(CONFIG_SERIAL_AMBA_PL011) += amba-pl011.o
obj-$(CONFIG_SERIAL_CLPS711X) += clps711x.o
--
1.6.0.4
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