powerpc/86xx: Board support for GE Fanuc's PPC9A

Support for the PPC9A VME Single Board Computer from GE Fanuc (PowerPC
MPC8641D).

This is the basic board support for GE Fanuc's PPC9A, a 6U single board
computer, based on Freescale's MPC8641D.

Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 223 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/86xx/gef_ppc9a.c b/arch/powerpc/platforms/86xx/gef_ppc9a.c
new file mode 100644
index 000000000000..830fd9a23b5a
--- /dev/null
+++ b/arch/powerpc/platforms/86xx/gef_ppc9a.c
@@ -0,0 +1,223 @@
+/*
+ * GE Fanuc PPC9A board support
+ *
+ * Author: Martyn Welch <martyn.welch@gefanuc.com>
+ *
+ * Copyright 2008 GE Fanuc Intelligent Platforms Embedded Systems, Inc.
+ *
+ * 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.
+ *
+ * Based on: mpc86xx_hpcn.c (MPC86xx HPCN board specific routines)
+ * Copyright 2006 Freescale Semiconductor Inc.
+ *
+ * NEC fixup adapted from arch/mips/pci/fixup-lm2e.c
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/kdev_t.h>
+#include <linux/delay.h>
+#include <linux/seq_file.h>
+#include <linux/of_platform.h>
+
+#include <asm/system.h>
+#include <asm/time.h>
+#include <asm/machdep.h>
+#include <asm/pci-bridge.h>
+#include <asm/mpc86xx.h>
+#include <asm/prom.h>
+#include <mm/mmu_decl.h>
+#include <asm/udbg.h>
+
+#include <asm/mpic.h>
+
+#include <sysdev/fsl_pci.h>
+#include <sysdev/fsl_soc.h>
+
+#include "mpc86xx.h"
+#include "gef_pic.h"
+
+#undef DEBUG
+
+#ifdef DEBUG
+#define DBG (fmt...) do { printk(KERN_ERR "PPC9A: " fmt); } while (0)
+#else
+#define DBG (fmt...) do { } while (0)
+#endif
+
+void __iomem *ppc9a_regs;
+
+static void __init gef_ppc9a_init_irq(void)
+{
+        struct device_node *cascade_node = NULL;
+
+        mpc86xx_init_irq();
+
+        /*
+         * There is a simple interrupt handler in the main FPGA, this needs
+         * to be cascaded into the MPIC
+         */
+        cascade_node = of_find_compatible_node(NULL, NULL, "gef,fpga-pic-1.00");
+        if (!cascade_node) {
+                printk(KERN_WARNING "PPC9A: No FPGA PIC\n");
+                return;
+        }
+
+        gef_pic_init(cascade_node);
+        of_node_put(cascade_node);
+}
+
+static void __init gef_ppc9a_setup_arch(void)
+{
+        struct device_node *regs;
+#ifdef CONFIG_PCI
+        struct device_node *np;
+
+        for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") {
+                fsl_add_bridge(np, 1);
+        }
+#endif
+
+        printk(KERN_INFO "GE Fanuc Intelligent Platforms PPC9A 6U VME SBC\n");
+
+#ifdef CONFIG_SMP
+        mpc86xx_smp_init();
+#endif
+
+        /* Remap basic board registers */
+        regs = of_find_compatible_node(NULL, NULL, "gef,ppc9a-fpga-regs");
+        if (regs) {
+                ppc9a_regs = of_iomap(regs, 0);
+                if (ppc9a_regs == NULL)
+                        printk(KERN_WARNING "Unable to map board registers\n");
+                of_node_put(regs);
+        }
+}
+
+/* Return the PCB revision */
+static unsigned int gef_ppc9a_get_pcb_rev(void)
+{
+        unsigned int reg;
+
+        reg = ioread32(ppc9a_regs);
+        return (reg >> 8) & 0xff;
+}
+
+/* Return the board (software) revision */
+static unsigned int gef_ppc9a_get_board_rev(void)
+{
+        unsigned int reg;
+
+        reg = ioread32(ppc9a_regs);
+        return (reg >> 16) & 0xff;
+}
+
+/* Return the FPGA revision */
+static unsigned int gef_ppc9a_get_fpga_rev(void)
+{
+        unsigned int reg;
+
+        reg = ioread32(ppc9a_regs);
+        return (reg >> 24) & 0xf;
+}
+
+static void gef_ppc9a_show_cpuinfo(struct seq_file *m)
+{
+        uint svid = mfspr(SPRN_SVR);
+
+        seq_printf(m, "Vendor\t\t: GE Fanuc Intelligent Platforms\n");
+
+        seq_printf(m, "Revision\t: %u%c\n", gef_ppc9a_get_pcb_rev(),
+                ('A' + gef_ppc9a_get_board_rev() - 1));
+        seq_printf(m, "FPGA Revision\t: %u\n", gef_ppc9a_get_fpga_rev());
+
+        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
+}
+
+static void __init gef_ppc9a_nec_fixup(struct pci_dev *pdev)
+{
+        unsigned int val;
+
+        /* Do not do the fixup on other platforms! */
+        if (!machine_is(gef_ppc9a))
+                return;
+
+        printk(KERN_INFO "Running NEC uPD720101 Fixup\n");
+
+        /* Ensure ports 1, 2, 3, 4 & 5 are enabled */
+        pci_read_config_dword(pdev, 0xe0, &val);
+        pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x5);
+
+        /* System clock is 48-MHz Oscillator and EHCI Enabled. */
+        pci_write_config_dword(pdev, 0xe4, 1 << 5);
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
+        gef_ppc9a_nec_fixup);
+
+/*
+ * Called very early, device-tree isn't unflattened
+ *
+ * This function is called to determine whether the BSP is compatible with the
+ * supplied device-tree, which is assumed to be the correct one for the actual
+ * board. It is expected thati, in the future, a kernel may support multiple
+ * boards.
+ */
+static int __init gef_ppc9a_probe(void)
+{
+        unsigned long root = of_get_flat_dt_root();
+
+        if (of_flat_dt_is_compatible(root, "gef,ppc9a"))
+                return 1;
+
+        return 0;
+}
+
+static long __init mpc86xx_time_init(void)
+{
+        unsigned int temp;
+
+        /* Set the time base to zero */
+        mtspr(SPRN_TBWL, 0);
+        mtspr(SPRN_TBWU, 0);
+
+        temp = mfspr(SPRN_HID0);
+        temp |= HID0_TBEN;
+        mtspr(SPRN_HID0, temp);
+        asm volatile("isync");
+
+        return 0;
+}
+
+static __initdata struct of_device_id of_bus_ids[] = {
+        { .compatible = "simple-bus", },
+        {},
+};
+
+static int __init declare_of_platform_devices(void)
+{
+        printk(KERN_DEBUG "Probe platform devices\n");
+        of_platform_bus_probe(NULL, of_bus_ids, NULL);
+
+        return 0;
+}
+machine_device_initcall(gef_ppc9a, declare_of_platform_devices);
+
+define_machine(gef_ppc9a) {
+        .name                   = "GE Fanuc PPC9A",
+        .probe                  = gef_ppc9a_probe,
+        .setup_arch             = gef_ppc9a_setup_arch,
+        .init_IRQ               = gef_ppc9a_init_irq,
+        .show_cpuinfo           = gef_ppc9a_show_cpuinfo,
+        .get_irq                = mpic_get_irq,
+        .restart                = fsl_rstcr_restart,
+        .time_init              = mpc86xx_time_init,
+        .calibrate_decr         = generic_calibrate_decr,
+        .progress               = udbg_progress,
+#ifdef CONFIG_PCI
+        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
+#endif
+};