[ARM] 4476/1: EM7210/SS4000E support

This patch adds the basic support for the em7210 board. It is similar to
the iq31244 board and can be found on Intel "Baxter Creek" ss4000e nas.
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-iop32x/Kconfig

@@ -42,6 +42,13 @@ config IOP3XX_ATU
           Say N if the IOP is an add in card, the host system owns the PCI
           bus in this case.
 
+config MACH_EM7210
+	bool "Enable support for the Lanner EM7210"
+	help
+	  Say Y here if you want to run your kernel on the Lanner EM7210
+	  board. Say also Y here if you have a SS4000e Baxter Creek NAS
+	  appliance."
+
 endmenu
 
 endif

arch/arm/mach-iop32x/Makefile

@@ -11,3 +11,4 @@ obj-$(CONFIG_MACH_GLANTANK) += glantank.o
 obj-$(CONFIG_ARCH_IQ80321) += iq80321.o
 obj-$(CONFIG_ARCH_IQ31244) += iq31244.o
 obj-$(CONFIG_MACH_N2100) += n2100.o
+obj-$(CONFIG_MACH_EM7210) += em7210.o

arch/arm/mach-iop32x/em7210.c

+/*
+ * arch/arm/mach-iop32x/em7210.c
+ *
+ * Board support code for the Lanner EM7210 platforms.
+ *
+ * Based on arch/arm/mach-iop32x/iq31244.c file.
+ *
+ * Copyright (C) 2007 Arnaud Patard <arnaud.patard@rtp-net.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/pm.h>
+#include <linux/serial_core.h>
+#include <linux/serial_8250.h>
+#include <linux/mtd/physmap.h>
+#include <linux/platform_device.h>
+#include <asm/hardware.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/pci.h>
+#include <asm/mach/time.h>
+#include <asm/mach-types.h>
+#include <asm/arch/time.h>
+
+static void __init em7210_timer_init(void)
+{
+	/* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
+	/* 33.333 MHz crystal.                                */
+	iop_init_time(200000000);
+}
+
+static struct sys_timer em7210_timer = {
+	.init		= em7210_timer_init,
+	.offset		= iop_gettimeoffset,
+};
+
+
+/*
+ * EM7210 I/O
+ */
+static struct map_desc em7210_io_desc[] __initdata = {
+	{	/* on-board devices */
+		.virtual	= IQ31244_UART,
+		.pfn		= __phys_to_pfn(IQ31244_UART),
+		.length		= 0x00100000,
+		.type		= MT_DEVICE,
+	},
+};
+
+void __init em7210_map_io(void)
+{
+	iop3xx_map_io();
+	iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
+}
+
+
+/*
+ * EM7210 PCI
+ */
+#define INTA	IRQ_IOP32X_XINT0
+#define INTB	IRQ_IOP32X_XINT1
+#define INTC	IRQ_IOP32X_XINT2
+#define INTD	IRQ_IOP32X_XINT3
+
+static int __init
+em7210_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	static int pci_irq_table[][4] = {
+		/*
+		 * PCI IDSEL/INTPIN->INTLINE
+		 * A       B       C       D
+		 */
+		{INTB, INTB, INTB, INTB}, /* console / uart */
+		{INTA, INTA, INTA, INTA}, /* 1st 82541      */
+		{INTD, INTD, INTD, INTD}, /* 2nd 82541      */
+		{INTC, INTC, INTC, INTC}, /* GD31244        */
+		{INTD, INTA, INTA, INTA}, /* mini-PCI       */
+		{INTD, INTC, INTA, INTA}, /* NEC USB        */
+	};
+
+	if (pin < 1 || pin > 4)
+		return -1;
+
+	return pci_irq_table[slot % 6][pin - 1];
+}
+
+static struct hw_pci em7210_pci __initdata = {
+	.swizzle	= pci_std_swizzle,
+	.nr_controllers = 1,
+	.setup		= iop3xx_pci_setup,
+	.preinit	= iop3xx_pci_preinit,
+	.scan		= iop3xx_pci_scan_bus,
+	.map_irq	= em7210_pci_map_irq,
+};
+
+static int __init em7210_pci_init(void)
+{
+	if (machine_is_em7210())
+		pci_common_init(&em7210_pci);
+
+	return 0;
+}
+
+subsys_initcall(em7210_pci_init);
+
+
+/*
+ * EM7210 Flash
+ */
+static struct physmap_flash_data em7210_flash_data = {
+	.width		= 2,
+};
+
+static struct resource em7210_flash_resource = {
+	.start		= 0xf0000000,
+	.end		= 0xf1ffffff,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device em7210_flash_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.dev		= {
+		.platform_data	= &em7210_flash_data,
+	},
+	.num_resources	= 1,
+	.resource	= &em7210_flash_resource,
+};
+
+
+/*
+ * EM7210 UART
+ * The physical address of the serial port is 0xfe800000,
+ * so it can be used for physical and virtual address.
+ */
+static struct plat_serial8250_port em7210_serial_port[] = {
+	{
+		.mapbase	= IQ31244_UART,
+		.membase	= (char *)IQ31244_UART,
+		.irq		= IRQ_IOP32X_XINT1,
+		.flags		= UPF_SKIP_TEST,
+		.iotype		= UPIO_MEM,
+		.regshift	= 0,
+		.uartclk	= 1843200,
+	},
+	{ },
+};
+
+static struct resource em7210_uart_resource = {
+	.start		= IQ31244_UART,
+	.end		= IQ31244_UART + 7,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device em7210_serial_device = {
+	.name		= "serial8250",
+	.id		= PLAT8250_DEV_PLATFORM,
+	.dev		= {
+		.platform_data		= em7210_serial_port,
+	},
+	.num_resources	= 1,
+	.resource	= &em7210_uart_resource,
+};
+
+void em7210_power_off(void)
+{
+	*IOP3XX_GPOE &= 0xfe;
+	*IOP3XX_GPOD |= 0x01;
+}
+
+static void __init em7210_init_machine(void)
+{
+	platform_device_register(&em7210_serial_device);
+	platform_device_register(&iop3xx_i2c0_device);
+	platform_device_register(&iop3xx_i2c1_device);
+	platform_device_register(&em7210_flash_device);
+	platform_device_register(&iop3xx_dma_0_channel);
+	platform_device_register(&iop3xx_dma_1_channel);
+
+
+	pm_power_off = em7210_power_off;
+}
+
+MACHINE_START(EM7210, "Lanner EM7210")
+	.phys_io	= IQ31244_UART,
+	.io_pg_offst	= ((IQ31244_UART) >> 18) & 0xfffc,
+	.boot_params	= 0xa0000100,
+	.map_io		= em7210_map_io,
+	.init_irq	= iop32x_init_irq,
+	.timer		= &em7210_timer,
+	.init_machine	= em7210_init_machine,
+MACHINE_END

arch/arm/mach-iop32x/irq.c

@@ -63,7 +63,8 @@ void __init iop32x_init_irq(void)
 	if (machine_is_glantank() ||
 	    machine_is_iq80321() ||
 	    machine_is_iq31244() ||
-	    machine_is_n2100())
+	    machine_is_n2100() ||
+	    machine_is_em7210())
 		*IOP3XX_PCIIRSR = 0x0f;
 
 	for (i = 0; i < NR_IRQS; i++) {

include/asm-arm/arch-iop32x/uncompress.h

@@ -26,7 +26,7 @@ static __inline__ void __arch_decomp_setup(unsigned long arch_id)
 {
 	if (machine_is_iq80321())
 		uart_base = (volatile u8 *)IQ80321_UART;
-	else if (machine_is_iq31244())
+	else if (machine_is_iq31244() || machine_is_em7210())
 		uart_base = (volatile u8 *)IQ31244_UART;
 	else
 		uart_base = (volatile u8 *)0xfe800000;