powerpc/cell: add QPACE as a separate Cell platform

Since the QPACE (Chromodynamics Parallel Computing on the
Cell Broadband Engine) platform doesn't use a iommu, doesn't
have PCI devices and a MPIC much lesser setup and
configurations are needed. So far all devices are detected
as OF device. A notifier function is used to set the dma_ops
for the of_platform bus. Further this patch splits the
PPC_CELL_NATIVE into PPC_CELL_COMMON which are parts that are
shared with the QPACE platform and the rest.

Signed-off-by: Benjamin Krill <ben@codiert.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 173 insertions, 15 deletions

diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig
index 617f84547b30..5cc3279559a4 100644
--- a/arch/powerpc/platforms/cell/Kconfig
+++ b/arch/powerpc/platforms/cell/Kconfig
@@ -2,13 +2,18 @@ config PPC_CELL
         bool
         default n
 
-config PPC_CELL_NATIVE
+config PPC_CELL_COMMON
         bool
         select PPC_CELL
         select PPC_DCR_MMIO
-        select PPC_OF_PLATFORM_PCI
         select PPC_INDIRECT_IO
         select PPC_NATIVE
+        select PPC_RTAS
+
+config PPC_CELL_NATIVE
+        bool
+        select PPC_CELL_COMMON
+        select PPC_OF_PLATFORM_PCI
         select MPIC
         select IBM_NEW_EMAC_EMAC4
         select IBM_NEW_EMAC_RGMII
@@ -20,7 +25,6 @@ config PPC_IBM_CELL_BLADE
         bool "IBM Cell Blade"
         depends on PPC_MULTIPLATFORM && PPC64
         select PPC_CELL_NATIVE
-        select PPC_RTAS
         select MMIO_NVRAM
         select PPC_UDBG_16550
         select UDBG_RTAS_CONSOLE
@@ -28,16 +32,17 @@ config PPC_IBM_CELL_BLADE
 config PPC_CELLEB
         bool "Toshiba's Cell Reference Set 'Celleb' Architecture"
         depends on PPC_MULTIPLATFORM && PPC64
-        select PPC_CELL
         select PPC_CELL_NATIVE
-        select PPC_RTAS
-        select PPC_INDIRECT_IO
-        select PPC_OF_PLATFORM_PCI
         select HAS_TXX9_SERIAL
         select PPC_UDBG_BEAT
         select USB_OHCI_BIG_ENDIAN_MMIO
         select USB_EHCI_BIG_ENDIAN_MMIO
 
+config PPC_CELL_QPACE
+        bool "IBM Cell - QPACE"
+        depends on PPC_MULTIPLATFORM && PPC64
+        select PPC_CELL_COMMON
+
 menu "Cell Broadband Engine options"
         depends on PPC_CELL
 
diff --git a/arch/powerpc/platforms/cell/Makefile b/arch/powerpc/platforms/cell/Makefile
index 7fd830872c43..43eccb270301 100644
--- a/arch/powerpc/platforms/cell/Makefile
+++ b/arch/powerpc/platforms/cell/Makefile
@@ -1,7 +1,7 @@
-obj-$(CONFIG_PPC_CELL_NATIVE)           += interrupt.o iommu.o setup.o \
-                                           cbe_regs.o spider-pic.o \
-                                           pervasive.o pmu.o io-workarounds.o \
-                                           spider-pci.o
+obj-$(CONFIG_PPC_CELL_COMMON)           += cbe_regs.o interrupt.o pervasive.o
+
+obj-$(CONFIG_PPC_CELL_NATIVE)           += iommu.o setup.o spider-pic.o \
+                                           pmu.o io-workarounds.o spider-pci.o
 obj-$(CONFIG_CBE_RAS)                   += ras.o
 
 obj-$(CONFIG_CBE_THERM)                 += cbe_thermal.o
@@ -14,13 +14,12 @@ obj-$(CONFIG_PPC_IBM_CELL_POWERBUTTON)	+= cbe_powerbutton.o
 
 ifeq ($(CONFIG_SMP),y)
 obj-$(CONFIG_PPC_CELL_NATIVE)           += smp.o
+obj-$(CONFIG_PPC_CELL_QPACE)            += smp.o
 endif
 
 # needed only when building loadable spufs.ko
-spu-priv1-$(CONFIG_PPC_CELL_NATIVE)     += spu_priv1_mmio.o
-
-spu-manage-$(CONFIG_PPC_CELLEB)         += spu_manage.o
-spu-manage-$(CONFIG_PPC_CELL_NATIVE)    += spu_manage.o
+spu-priv1-$(CONFIG_PPC_CELL_COMMON)     += spu_priv1_mmio.o
+spu-manage-$(CONFIG_PPC_CELL_COMMON)    += spu_manage.o
 
 obj-$(CONFIG_SPU_BASE)                  += spu_callbacks.o spu_base.o \
                                            spu_notify.o \
@@ -31,6 +30,8 @@ obj-$(CONFIG_SPU_BASE)			+= spu_callbacks.o spu_base.o \
 
 obj-$(CONFIG_PCI_MSI)                   += axon_msi.o
 
+# qpace setup
+obj-$(CONFIG_PPC_CELL_QPACE)            += qpace_setup.o
 
 # celleb stuff
 ifeq ($(CONFIG_PPC_CELLEB),y)
diff --git a/arch/powerpc/platforms/cell/qpace_setup.c b/arch/powerpc/platforms/cell/qpace_setup.c
new file mode 100644
index 000000000000..be84e6a16b30
--- /dev/null
+++ b/arch/powerpc/platforms/cell/qpace_setup.c
@@ -0,0 +1,152 @@
+/*
+ *  linux/arch/powerpc/platforms/cell/qpace_setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ *  Modified by PPC64 Team, IBM Corp
+ *  Modified by Cell Team, IBM Deutschland Entwicklung GmbH
+ *  Modified by Benjamin Krill <ben@codiert.org>, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/console.h>
+#include <linux/of_platform.h>
+
+#include <asm/mmu.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/kexec.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/cputable.h>
+#include <asm/irq.h>
+#include <asm/spu.h>
+#include <asm/spu_priv1.h>
+#include <asm/udbg.h>
+#include <asm/cell-regs.h>
+
+#include "interrupt.h"
+#include "pervasive.h"
+#include "ras.h"
+#include "io-workarounds.h"
+
+static void qpace_show_cpuinfo(struct seq_file *m)
+{
+        struct device_node *root;
+        const char *model = "";
+
+        root = of_find_node_by_path("/");
+        if (root)
+                model = of_get_property(root, "model", NULL);
+        seq_printf(m, "machine\t\t: CHRP %s\n", model);
+        of_node_put(root);
+}
+
+static void qpace_progress(char *s, unsigned short hex)
+{
+        printk("*** %04x : %s\n", hex, s ? s : "");
+}
+
+static int __init qpace_publish_devices(void)
+{
+        int node;
+
+        /* Publish OF platform devices for southbridge IOs */
+        of_platform_bus_probe(NULL, NULL, NULL);
+
+        /* There is no device for the MIC memory controller, thus we create
+         * a platform device for it to attach the EDAC driver to.
+         */
+        for_each_online_node(node) {
+                if (cbe_get_cpu_mic_tm_regs(cbe_node_to_cpu(node)) == NULL)
+                        continue;
+                platform_device_register_simple("cbe-mic", node, NULL, 0);
+        }
+
+        return 0;
+}
+machine_subsys_initcall(qpace, qpace_publish_devices);
+
+extern int qpace_notify(struct device *dev)
+{
+        /* set dma_ops for of_platform bus */
+        if (dev->bus && dev->bus->name
+                        && !strcmp(dev->bus->name, "of_platform"))
+                set_dma_ops(dev, &dma_direct_ops);
+
+        return 0;
+}
+
+static void __init qpace_setup_arch(void)
+{
+#ifdef CONFIG_SPU_BASE
+        spu_priv1_ops = &spu_priv1_mmio_ops;
+        spu_management_ops = &spu_management_of_ops;
+#endif
+
+        cbe_regs_init();
+
+#ifdef CONFIG_CBE_RAS
+        cbe_ras_init();
+#endif
+
+#ifdef CONFIG_SMP
+        smp_init_cell();
+#endif
+
+        /* init to some ~sane value until calibrate_delay() runs */
+        loops_per_jiffy = 50000000;
+
+        cbe_pervasive_init();
+#ifdef CONFIG_DUMMY_CONSOLE
+        conswitchp = &dummy_con;
+#endif
+
+        /* set notifier function */
+        platform_notify = &qpace_notify;
+}
+
+static int __init qpace_probe(void)
+{
+        unsigned long root = of_get_flat_dt_root();
+
+        if (!of_flat_dt_is_compatible(root, "IBM,QPACE"))
+                return 0;
+
+        hpte_init_native();
+
+        return 1;
+}
+
+define_machine(qpace) {
+        .name                   = "QPACE",
+        .probe                  = qpace_probe,
+        .setup_arch             = qpace_setup_arch,
+        .show_cpuinfo           = qpace_show_cpuinfo,
+        .restart                = rtas_restart,
+        .power_off              = rtas_power_off,
+        .halt                   = rtas_halt,
+        .get_boot_time          = rtas_get_boot_time,
+        .calibrate_decr         = generic_calibrate_decr,
+        .progress               = qpace_progress,
+        .init_IRQ               = iic_init_IRQ,
+#ifdef CONFIG_KEXEC
+        .machine_kexec          = default_machine_kexec,
+        .machine_kexec_prepare  = default_machine_kexec_prepare,
+        .machine_crash_shutdown = default_machine_crash_shutdown,
+#endif
+};