[POWERPC] Linkstation / kurobox support

Support for the Kurobox(HG)/LinkStation-I NAS systems by Buffalo
Technology, should be also applicable to the PPC TeraStation family.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 211 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/embedded6xx/linkstation.c b/arch/powerpc/platforms/embedded6xx/linkstation.c
new file mode 100644
index 00000000000..61599d919ea
--- /dev/null
+++ b/arch/powerpc/platforms/embedded6xx/linkstation.c
@@ -0,0 +1,211 @@
+/*
+ * Board setup routines for the Buffalo Linkstation / Kurobox Platform.
+ *
+ * Copyright (C) 2006 G. Liakhovetski (g.liakhovetski@gmx.de)
+ *
+ * Based on sandpoint.c by Mark A. Greer
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/initrd.h>
+#include <linux/root_dev.h>
+#include <linux/mtd/physmap.h>
+
+#include <asm/time.h>
+#include <asm/prom.h>
+#include <asm/mpic.h>
+#include <asm/mpc10x.h>
+#include <asm/pci-bridge.h>
+
+static struct mtd_partition linkstation_physmap_partitions[] = {
+	{
+		.name   = "mtd_firmimg",
+		.offset = 0x000000,
+		.size   = 0x300000,
+	},
+	{
+		.name   = "mtd_bootcode",
+		.offset = 0x300000,
+		.size   = 0x070000,
+	},
+	{
+		.name   = "mtd_status",
+		.offset = 0x370000,
+		.size   = 0x010000,
+	},
+	{
+		.name   = "mtd_conf",
+		.offset = 0x380000,
+		.size   = 0x080000,
+	},
+	{
+		.name   = "mtd_allflash",
+		.offset = 0x000000,
+		.size   = 0x400000,
+	},
+	{
+		.name   = "mtd_data",
+		.offset = 0x310000,
+		.size   = 0x0f0000,
+	},
+};
+
+static int __init add_bridge(struct device_node *dev)
+{
+	int len;
+	struct pci_controller *hose;
+	int *bus_range;
+
+	printk("Adding PCI host bridge %s\n", dev->full_name);
+
+	bus_range = (int *) get_property(dev, "bus-range", &len);
+	if (bus_range == NULL || len < 2 * sizeof(int))
+		printk(KERN_WARNING "Can't get bus-range for %s, assume"
+				" bus 0\n", dev->full_name);
+
+	hose = pcibios_alloc_controller();
+	if (hose == NULL)
+		return -ENOMEM;
+	hose->first_busno = bus_range ? bus_range[0] : 0;
+	hose->last_busno = bus_range ? bus_range[1] : 0xff;
+	hose->arch_data = dev;
+	setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
+
+	/* Interpret the "ranges" property */
+	/* This also maps the I/O region and sets isa_io/mem_base */
+	pci_process_bridge_OF_ranges(hose, dev, 1);
+
+	return 0;
+}
+
+static void __init linkstation_setup_arch(void)
+{
+	struct device_node *np;
+#ifdef CONFIG_MTD_PHYSMAP
+	physmap_set_partitions(linkstation_physmap_partitions,
+			       ARRAY_SIZE(linkstation_physmap_partitions));
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (initrd_start)
+		ROOT_DEV = Root_RAM0;
+	else
+#endif
+#ifdef	CONFIG_ROOT_NFS
+		ROOT_DEV = Root_NFS;
+#else
+		ROOT_DEV = Root_HDA1;
+#endif
+
+	/* Lookup PCI host bridges */
+	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
+		add_bridge(np);
+
+	printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
+	printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
+}
+
+/*
+ * Interrupt setup and service.  Interrrupts on the linkstation come
+ * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
+ */
+static void __init linkstation_init_IRQ(void)
+{
+	struct mpic *mpic;
+	struct device_node *dnp;
+	void *prop;
+	int size;
+	phys_addr_t paddr;
+
+	dnp = of_find_node_by_type(NULL, "open-pic");
+	if (dnp == NULL)
+		return;
+
+	prop = (struct device_node *)get_property(dnp, "reg", &size);
+	paddr = (phys_addr_t)of_translate_address(dnp, prop);
+
+	mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET, 4, 32, " EPIC     ");
+	BUG_ON(mpic == NULL);
+
+	/* PCI IRQs */
+	mpic_assign_isu(mpic, 0, paddr + 0x10200);
+
+	/* I2C */
+	mpic_assign_isu(mpic, 1, paddr + 0x11000);
+
+	/* ttyS0, ttyS1 */
+	mpic_assign_isu(mpic, 2, paddr + 0x11100);
+
+	mpic_init(mpic);
+}
+
+extern void avr_uart_configure(void);
+extern void avr_uart_send(const char);
+
+static void linkstation_restart(char *cmd)
+{
+	local_irq_disable();
+
+	/* Reset system via AVR */
+	avr_uart_configure();
+	/* Send reboot command */
+	avr_uart_send('C');
+
+	for(;;)  /* Spin until reset happens */
+		avr_uart_send('G');	/* "kick" */
+}
+
+static void linkstation_power_off(void)
+{
+	local_irq_disable();
+
+	/* Power down system via AVR */
+	avr_uart_configure();
+	/* send shutdown command */
+	avr_uart_send('E');
+
+	for(;;)  /* Spin until power-off happens */
+		avr_uart_send('G');	/* "kick" */
+	/* NOTREACHED */
+}
+
+static void linkstation_halt(void)
+{
+	linkstation_power_off();
+	/* NOTREACHED */
+}
+
+static void linkstation_show_cpuinfo(struct seq_file *m)
+{
+	seq_printf(m, "vendor\t\t: Buffalo Technology\n");
+	seq_printf(m, "machine\t\t: Linkstation I/Kurobox(HG)\n");
+}
+
+static int __init linkstation_probe(void)
+{
+	unsigned long root;
+
+	root = of_get_flat_dt_root();
+
+	if (!of_flat_dt_is_compatible(root, "linkstation"))
+		return 0;
+	return 1;
+}
+
+define_machine(linkstation){
+	.name 			= "Buffalo Linkstation",
+	.probe 			= linkstation_probe,
+	.setup_arch 		= linkstation_setup_arch,
+	.init_IRQ 		= linkstation_init_IRQ,
+	.show_cpuinfo 		= linkstation_show_cpuinfo,
+	.get_irq 		= mpic_get_irq,
+	.restart 		= linkstation_restart,
+	.power_off 		= linkstation_power_off,
+	.halt	 		= linkstation_halt,
+	.calibrate_decr 	= generic_calibrate_decr,
+};