[ARM PATCH] 1807/1: S3C2410 - onboard serial

Patch from Ben Dooks

Serial driver for S3C2410 on board UARTs. Re-post of 1796/1

Includes BAST driver to register on-board 16550s.

drivers/serial/Kconfig

@@ -224,6 +224,37 @@ config SERIAL_CLPS711X_CONSOLE
 	  your boot loader (lilo or loadlin) about how to pass options to the
 	  kernel at boot time.)
 
+config SERIAL_S3C2410
+	tristate "Samsung S3C2410 Serial port support"
+	depends on ARM && ARCH_S3C2410
+	select SERIAL_CORE
+	help
+	  Support for the on-chip UARTs on the Samsung S3C2410X CPU,
+	  providing /dev/ttySAC0, 1 and 2 (note, some machines may not
+	  provide all of these ports, depending on how the serial port
+	  pins are configured.
+
+config SERIAL_S3C2410_CONSOLE
+	bool "Support for console on S3C2410 serial port"
+	depends on SERIAL_S3C2410=y
+	help
+	  Allow selection of the S3C2410 on-board serial ports for use as
+	  an virtual console.
+
+	  Even if you say Y here, the currently visible virtual console
+	  (/dev/tty0) will still be used as the system console by default, but
+	  you can alter that using a kernel command line option such as
+	  "console=ttySACx". (Try "man bootparam" or see the documentation of
+	  your boot loader about how to pass options to the kernel at
+	  boot time.)
+
+config SERIAL_BAST_SIO
+	bool "Support for BAST SuperIO serial ports"
+	depends on ARCH_BAST && SERIAL_8250=y
+	help
+	  Support for registerin the SuperIO chip on BAST board with
+	  the 8250/16550 uart code.
+
 config SERIAL_DZ
 	bool "DECstation DZ serial driver"
 	depends on DECSTATION

drivers/serial/Makefile

@@ -20,6 +20,7 @@ obj-$(CONFIG_SERIAL_AMBA) += amba.o
 obj-$(CONFIG_SERIAL_CLPS711X) += clps711x.o
 obj-$(CONFIG_SERIAL_PXA) += pxa.o
 obj-$(CONFIG_SERIAL_SA1100) += sa1100.o
+obj-$(CONFIG_SERIAL_S3C2410) += s3c2410.o
 obj-$(CONFIG_SERIAL_UART00) += uart00.o
 obj-$(CONFIG_SERIAL_SUNCORE) += suncore.o
 obj-$(CONFIG_SERIAL_SUNZILOG) += sunzilog.o
@@ -36,3 +37,4 @@ obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o
 obj-$(CONFIG_SERIAL_AU1X00) += au1x00_uart.o
 obj-$(CONFIG_SERIAL_DZ) += dz.o
 obj-$(CONFIG_SERIAL_SH_SCI) += sh-sci.o
+obj-$(CONFIG_SERIAL_BAST_SIO) += bast_sio.o

drivers/serial/bast_sio.c

+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+#include <asm/serial.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/map.h>
+#include <asm/arch/irqs.h>
+#include <asm/arch/bast-map.h>
+#include <asm/arch/bast-irq.h>
+
+static int __init serial_bast_register(unsigned long port, unsigned int irq)
+{
+	struct serial_struct serial_req;
+
+#if 0
+	printk("BAST: SuperIO serial (%08lx,%d)\n", port, irq);
+#endif
+
+	serial_req.flags      = UPF_AUTOPROBE | UPF_RESOURCES | UPF_SHARE_IRQ;
+	serial_req.baud_base  = BASE_BAUD;
+	serial_req.irq        = irq;
+	serial_req.io_type    = UPIO_MEM;
+	serial_req.iomap_base = port;
+	serial_req.iomem_base = ioremap(port, 0x10);
+	serial_req.iomem_reg_shift = 0;
+
+	return register_serial(&serial_req);
+}
+
+#define SERIAL_BASE (S3C2410_CS2 + BAST_PA_SUPERIO)
+
+static int __init serial_bast_init(void)
+{
+	if (machine_is_bast()) {
+		serial_bast_register(SERIAL_BASE + 0x2f8, IRQ_PCSERIAL1);
+		serial_bast_register(SERIAL_BASE + 0x3f8, IRQ_PCSERIAL2);
+	}
+
+	return 0;
+}
+
+static void __exit serial_bast_exit(void)
+{
+	/* todo -> remove both our ports */
+}
+
+
+module_init(serial_bast_init);
+module_exit(serial_bast_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ben Dooks, ben@simtec.co.uk");
+MODULE_DESCRIPTION("BAST Onboard Serial setup");
+
+

include/linux/serial_core.h

@@ -83,6 +83,9 @@
 #define PORT_SCIF	53
 #define PORT_IRDA	54
 
+/* Samsung S3C2410 SoC and derivatives thereof */
+#define PORT_S3C2410    55
+
 #ifdef __KERNEL__
 
 #include <linux/config.h>