[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>

7 files changed, 436 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 904798fd4e74..c9dcec7f3c61 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -413,6 +413,17 @@ config PPC_MAPLE
           This option enables support for the Maple 970FX Evaluation Board.
           For more informations, refer to <http://www.970eval.com>
 
+config PPC_PASEMI
+        depends on PPC_MULTIPLATFORM && PPC64
+        bool "PA Semi SoC-based platforms"
+        default n
+        select MPIC
+        select PPC_UDBG_16550
+        select GENERIC_TBSYNC
+        help
+          This option enables support for PA Semi's PWRficient line
+          of SoC processors, including PA6T-1682M
+
 config PPC_CELL
         bool
         default n
diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile
index 5cf46dc57895..e58fa953a50b 100644
--- a/arch/powerpc/platforms/Makefile
+++ b/arch/powerpc/platforms/Makefile
@@ -13,5 +13,6 @@ obj-$(CONFIG_PPC_86xx)		+= 86xx/
 obj-$(CONFIG_PPC_PSERIES)       += pseries/
 obj-$(CONFIG_PPC_ISERIES)       += iseries/
 obj-$(CONFIG_PPC_MAPLE)         += maple/
+obj-$(CONFIG_PPC_PASEMI)                += pasemi/
 obj-$(CONFIG_PPC_CELL)          += cell/
 obj-$(CONFIG_EMBEDDED6xx)       += embedded6xx/
diff --git a/arch/powerpc/platforms/pasemi/Makefile b/arch/powerpc/platforms/pasemi/Makefile
new file mode 100644
index 000000000000..1be1a993c5f5
--- /dev/null
+++ b/arch/powerpc/platforms/pasemi/Makefile
@@ -0,0 +1 @@
+obj-y   += setup.o pci.o time.o
diff --git a/arch/powerpc/platforms/pasemi/pasemi.h b/arch/powerpc/platforms/pasemi/pasemi.h
new file mode 100644
index 000000000000..fd71d72736b2
--- /dev/null
+++ b/arch/powerpc/platforms/pasemi/pasemi.h
@@ -0,0 +1,8 @@
+#ifndef _PASEMI_PASEMI_H
+#define _PASEMI_PASEMI_H
+
+extern unsigned long pas_get_boot_time(void);
+extern void pas_pci_init(void);
+extern void pas_pcibios_fixup(void);
+
+#endif /* _PASEMI_PASEMI_H */
diff --git a/arch/powerpc/platforms/pasemi/pci.c b/arch/powerpc/platforms/pasemi/pci.c
new file mode 100644
index 000000000000..4679c5230413
--- /dev/null
+++ b/arch/powerpc/platforms/pasemi/pci.c
@@ -0,0 +1,198 @@
+/*
+ * 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/pci.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/kernel.h>
+#include <linux/pci.h>
+
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+
+#include <asm/ppc-pci.h>
+
+#define PA_PXP_CFA(bus, devfn, off) (((bus) << 20) | ((devfn) << 12) | (off))
+
+#define CONFIG_OFFSET_VALID(off) ((off) < 4096)
+
+static unsigned long pa_pxp_cfg_addr(struct pci_controller *hose,
+                                       u8 bus, u8 devfn, int offset)
+{
+        return ((unsigned long)hose->cfg_data) + PA_PXP_CFA(bus, devfn, offset);
+}
+
+static int pa_pxp_read_config(struct pci_bus *bus, unsigned int devfn,
+                              int offset, int len, u32 *val)
+{
+        struct pci_controller *hose;
+        unsigned long addr;
+
+        hose = pci_bus_to_host(bus);
+        if (!hose)
+                return PCIBIOS_DEVICE_NOT_FOUND;
+
+        if (!CONFIG_OFFSET_VALID(offset))
+                return PCIBIOS_BAD_REGISTER_NUMBER;
+
+        addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset);
+
+        /*
+         * Note: the caller has already checked that offset is
+         * suitably aligned and that len is 1, 2 or 4.
+         */
+        switch (len) {
+        case 1:
+                *val = in_8((u8 *)addr);
+                break;
+        case 2:
+                *val = in_le16((u16 *)addr);
+                break;
+        default:
+                *val = in_le32((u32 *)addr);
+                break;
+        }
+
+        return PCIBIOS_SUCCESSFUL;
+}
+
+static int pa_pxp_write_config(struct pci_bus *bus, unsigned int devfn,
+                               int offset, int len, u32 val)
+{
+        struct pci_controller *hose;
+        unsigned long addr;
+
+        hose = pci_bus_to_host(bus);
+        if (!hose)
+                return PCIBIOS_DEVICE_NOT_FOUND;
+
+        if (!CONFIG_OFFSET_VALID(offset))
+                return PCIBIOS_BAD_REGISTER_NUMBER;
+
+        addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset);
+
+        /*
+         * Note: the caller has already checked that offset is
+         * suitably aligned and that len is 1, 2 or 4.
+         */
+        switch (len) {
+        case 1:
+                out_8((u8 *)addr, val);
+                (void) in_8((u8 *)addr);
+                break;
+        case 2:
+                out_le16((u16 *)addr, val);
+                (void) in_le16((u16 *)addr);
+                break;
+        default:
+                out_le32((u32 *)addr, val);
+                (void) in_le32((u32 *)addr);
+                break;
+        }
+        return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops pa_pxp_ops = {
+        pa_pxp_read_config,
+        pa_pxp_write_config,
+};
+
+static void __init setup_pa_pxp(struct pci_controller *hose)
+{
+        hose->ops = &pa_pxp_ops;
+        hose->cfg_data = ioremap(0xe0000000, 0x10000000);
+}
+
+static int __init add_bridge(struct device_node *dev)
+{
+        struct pci_controller *hose;
+
+        pr_debug("Adding PCI host bridge %s\n", dev->full_name);
+
+        hose = pcibios_alloc_controller(dev);
+        if (!hose)
+                return -ENOMEM;
+
+        hose->first_busno = 0;
+        hose->last_busno = 0xff;
+
+        setup_pa_pxp(hose);
+
+        printk(KERN_INFO "Found PA-PXP PCI host bridge.\n");
+
+        /* 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);
+        pci_setup_phb_io(hose, 1);
+
+        return 0;
+}
+
+
+void __init pas_pcibios_fixup(void)
+{
+        struct pci_dev *dev = NULL;
+
+        for_each_pci_dev(dev)
+                pci_read_irq_line(dev);
+}
+
+static void __init pas_fixup_phb_resources(void)
+{
+        struct pci_controller *hose, *tmp;
+
+        list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+                unsigned long offset = (unsigned long)hose->io_base_virt - pci_io_base;
+                hose->io_resource.start += offset;
+                hose->io_resource.end += offset;
+                printk(KERN_INFO "PCI Host %d, io start: %lx; io end: %lx\n",
+                       hose->global_number,
+                       hose->io_resource.start, hose->io_resource.end);
+        }
+}
+
+
+void __init pas_pci_init(void)
+{
+        struct device_node *np, *root;
+
+        root = of_find_node_by_path("/");
+        if (!root) {
+                printk(KERN_CRIT "pas_pci_init: can't find root "
+                        "of device tree\n");
+                return;
+        }
+
+        for (np = NULL; (np = of_get_next_child(root, np)) != NULL;)
+                if (np->name && !strcmp(np->name, "pxp") && !add_bridge(np))
+                        of_node_get(np);
+
+        of_node_put(root);
+
+        pas_fixup_phb_resources();
+
+        /* Setup the linkage between OF nodes and PHBs */
+        pci_devs_phb_init();
+
+        /* Use the common resource allocation mechanism */
+        pci_probe_only = 1;
+}
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
new file mode 100644
index 000000000000..628482671c15
--- /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,
+};
diff --git a/arch/powerpc/platforms/pasemi/time.c b/arch/powerpc/platforms/pasemi/time.c
new file mode 100644
index 000000000000..9bd410b8fec6
--- /dev/null
+++ b/arch/powerpc/platforms/pasemi/time.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2006 PA Semi, Inc
+ *
+ * Maintained by: Olof Johansson <olof@lixom.net>
+ *
+ * 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/time.h>
+
+#include <asm/time.h>
+
+unsigned long __init pas_get_boot_time(void)
+{
+        /* Let's just return a fake date right now */
+        return mktime(2006, 1, 1, 12, 0, 0);
+}