[POWERPC] powerpc: PA Semi PWRficient platform support

Base patch for PA6T and PA6T-1682M. This introduces the
arch/powerpc/platform/pasemi directory, together with basic
implementations for various setup.

Much of this was based on other platform code, i.e. Maple, etc.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 188 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
new file mode 100644
index 00000000000..628482671c1
--- /dev/null
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2006 PA Semi, Inc
+ *
+ * Authors: Kip Walker, PA Semi
+ *	    Olof Johansson, PA Semi
+ *
+ * Maintained by: Olof Johansson <olof@lixom.net>
+ *
+ * Based on arch/powerpc/platforms/maple/setup.c
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/console.h>
+
+#include <asm/prom.h>
+#include <asm/system.h>
+#include <asm/iommu.h>
+#include <asm/machdep.h>
+#include <asm/mpic.h>
+#include <asm/smp.h>
+#include <asm/time.h>
+
+#include "pasemi.h"
+
+static void pas_restart(char *cmd)
+{
+	printk("restart unimplemented, looping...\n");
+	for (;;) ;
+}
+
+static void pas_power_off(void)
+{
+	printk("power off unimplemented, looping...\n");
+	for (;;) ;
+}
+
+static void pas_halt(void)
+{
+	pas_power_off();
+}
+
+#ifdef CONFIG_SMP
+struct smp_ops_t pas_smp_ops = {
+	.probe		= smp_mpic_probe,
+	.message_pass	= smp_mpic_message_pass,
+	.kick_cpu	= smp_generic_kick_cpu,
+	.setup_cpu	= smp_mpic_setup_cpu,
+	.give_timebase	= smp_generic_give_timebase,
+	.take_timebase	= smp_generic_take_timebase,
+};
+#endif /* CONFIG_SMP */
+
+void __init pas_setup_arch(void)
+{
+#ifdef CONFIG_SMP
+	/* Setup SMP callback */
+	smp_ops = &pas_smp_ops;
+#endif
+	/* Lookup PCI hosts */
+	pas_pci_init();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+	conswitchp = &dummy_con;
+#endif
+
+	printk(KERN_DEBUG "Using default idle loop\n");
+}
+
+static void iommu_dev_setup_null(struct pci_dev *dev) { }
+static void iommu_bus_setup_null(struct pci_bus *bus) { }
+
+static void __init pas_init_early(void)
+{
+	/* No iommu code yet */
+	ppc_md.iommu_dev_setup = iommu_dev_setup_null;
+	ppc_md.iommu_bus_setup = iommu_bus_setup_null;
+	pci_direct_iommu_init();
+}
+
+/* No legacy IO on our parts */
+static int pas_check_legacy_ioport(unsigned int baseport)
+{
+	return -ENODEV;
+}
+
+static __init void pas_init_IRQ(void)
+{
+	struct device_node *np;
+	struct device_node *root, *mpic_node;
+	unsigned long openpic_addr;
+	const unsigned int *opprop;
+	int naddr, opplen;
+	struct mpic *mpic;
+
+	mpic_node = NULL;
+
+	for_each_node_by_type(np, "interrupt-controller")
+		if (device_is_compatible(np, "open-pic")) {
+			mpic_node = np;
+			break;
+		}
+	if (!mpic_node)
+		for_each_node_by_type(np, "open-pic") {
+			mpic_node = np;
+			break;
+		}
+	if (!mpic_node) {
+		printk(KERN_ERR
+			"Failed to locate the MPIC interrupt controller\n");
+		return;
+	}
+
+	/* Find address list in /platform-open-pic */
+	root = of_find_node_by_path("/");
+	naddr = prom_n_addr_cells(root);
+	opprop = get_property(root, "platform-open-pic", &opplen);
+	if (!opprop) {
+		printk(KERN_ERR "No platform-open-pic property.\n");
+		of_node_put(root);
+		return;
+	}
+	openpic_addr = of_read_number(opprop, naddr);
+	printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
+	of_node_put(root);
+
+	mpic = mpic_alloc(mpic_node, openpic_addr, MPIC_PRIMARY, 0, 0,
+			  " PAS-OPIC  ");
+	BUG_ON(!mpic);
+
+	mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
+	mpic_init(mpic);
+	of_node_put(mpic_node);
+	of_node_put(root);
+}
+
+static void __init pas_progress(char *s, unsigned short hex)
+{
+	printk("[%04x] : %s\n", hex, s ? s : "");
+}
+
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init pas_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
+		return 0;
+
+	hpte_init_native();
+
+	return 1;
+}
+
+define_machine(pas) {
+	.name			= "PA Semi PA6T-1682M",
+	.probe			= pas_probe,
+	.setup_arch		= pas_setup_arch,
+	.init_early		= pas_init_early,
+	.init_IRQ		= pas_init_IRQ,
+	.get_irq		= mpic_get_irq,
+	.pcibios_fixup		= pas_pcibios_fixup,
+	.restart		= pas_restart,
+	.power_off		= pas_power_off,
+	.halt			= pas_halt,
+	.get_boot_time		= pas_get_boot_time,
+	.calibrate_decr		= generic_calibrate_decr,
+	.check_legacy_ioport    = pas_check_legacy_ioport,
+	.progress		= pas_progress,
+};