[PATCH] m32r: SIO driver

Here is a patch to support the M32R SIO (serial IO) driver.

This driver supports the M32R serial ports.
- Supports two types M32R serial interfaces; M32R_SIO and M32R_PLDSIO.
- With SMP safeness.

Currently the M32R_PLDSIO serial interface, which is implemented on a PLD
on the M3T-M32700UT evaluation board, has slightly different specification
from the integrated peripheral SIO (M32R_SIO).  Now we can select them by
CONFIG_ option.

It is a serial-core based driver, based on drivers/serial/8250.c.  Any
comments or suggestions will be appreciated.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/serial/Kconfig

@@ -727,4 +727,33 @@ config SERIAL_ICOM
 	  This driver can also be built as a module.  If so, the module
 	  will be called icom.
 
+config SERIAL_M32R_SIO
+	bool "M32R SIO I/F"
+	depends on M32R
+	default y
+	select SERIAL_CORE
+	help
+	  Say Y here if you want to use the M32R serial controller.
+
+config SERIAL_M32R_SIO_CONSOLE
+	bool "use SIO console"
+	depends on SERIAL_M32R_SIO=y
+	select SERIAL_CORE_CONSOLE
+	help
+	  Say Y here if you want to support a serial console.
+
+	  If you use an M3T-M32700UT or an OPSPUT platform,
+	  please say also y for SERIAL_M32R_PLDSIO.
+
+config SERIAL_M32R_PLDSIO
+	bool "M32R SIO I/F on a PLD"
+	depends on SERIAL_M32R_SIO=y
+	default n
+	help
+	  Say Y here if you want to use the M32R serial controller
+	  on a PLD (Programmable Logic Device).
+
+	  If you use an M3T-M32700UT or an OPSPUT platform,
+	  please say Y.
+
 endmenu

drivers/serial/Makefile

@@ -41,3 +41,4 @@ obj-$(CONFIG_SERIAL_BAST_SIO) += bast_sio.o
 obj-$(CONFIG_SERIAL_SGI_L1_CONSOLE) += sn_console.o
 obj-$(CONFIG_SERIAL_CPM) += cpm_uart/
 obj-$(CONFIG_SERIAL_MPC52xx) += mpc52xx_uart.o
+obj-$(CONFIG_SERIAL_M32R_SIO) += m32r_sio.o

drivers/serial/m32r_sio.h

+/*
+ *  m32r_sio.h
+ *
+ *  Driver for M32R serial ports
+ *
+ *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
+ *  Based on drivers/serial/8250.h.
+ *
+ *  Copyright (C) 2001  Russell King.
+ *  Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
+ *
+ * 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/config.h>
+
+struct m32r_sio_probe {
+	struct module	*owner;
+	int		(*pci_init_one)(struct pci_dev *dev);
+	void		(*pci_remove_one)(struct pci_dev *dev);
+	void		(*pnp_init)(void);
+};
+
+int m32r_sio_register_probe(struct m32r_sio_probe *probe);
+void m32r_sio_unregister_probe(struct m32r_sio_probe *probe);
+void m32r_sio_get_irq_map(unsigned int *map);
+void m32r_sio_suspend_port(int line);
+void m32r_sio_resume_port(int line);
+
+struct old_serial_port {
+	unsigned int uart;
+	unsigned int baud_base;
+	unsigned int port;
+	unsigned int irq;
+	unsigned int flags;
+	unsigned char hub6;
+	unsigned char io_type;
+	unsigned char *iomem_base;
+	unsigned short iomem_reg_shift;
+};
+
+#define _INLINE_ inline
+
+#define PROBE_RSA	(1 << 0)
+#define PROBE_ANY	(~0)
+
+#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
+
+#ifdef CONFIG_SERIAL_SIO_SHARE_IRQ
+#define M32R_SIO_SHARE_IRQS 1
+#else
+#define M32R_SIO_SHARE_IRQS 0
+#endif