[MIPS] Support for the R5500-based NEC EMMA2RH Mark-eins board

Signed-off-by: dmitry pervushin  <dpervushin@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

4 files changed, 332 insertions, 0 deletions

diff --git a/arch/mips/emma2rh/common/Makefile b/arch/mips/emma2rh/common/Makefile
new file mode 100644
index 000000000000..859121b3867d
--- /dev/null
+++ b/arch/mips/emma2rh/common/Makefile
@@ -0,0 +1,13 @@
+#
+#  arch/mips/emma2rh/common/Makefile
+#       Makefile for the common code of NEC EMMA2RH based board.
+#
+#  Copyright (C) NEC Electronics Corporation 2005-2006
+#
+#  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.
+#
+
+obj-$(CONFIG_MARKEINS)  += irq.o irq_emma2rh.o prom.o
diff --git a/arch/mips/emma2rh/common/irq.c b/arch/mips/emma2rh/common/irq.c
new file mode 100644
index 000000000000..b075281e50e9
--- /dev/null
+++ b/arch/mips/emma2rh/common/irq.c
@@ -0,0 +1,108 @@
+/*
+ *  arch/mips/emma2rh/common/irq.c
+ *      This file is common irq dispatcher.
+ *
+ *  Copyright (C) NEC Electronics Corporation 2005-2006
+ *
+ *  This file is based on the arch/mips/ddb5xxx/ddb5477/irq.c
+ *
+ *      Copyright 2001 MontaVista Software 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.
+ *
+ *  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/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/types.h>
+
+#include <asm/i8259.h>
+#include <asm/system.h>
+#include <asm/mipsregs.h>
+#include <asm/debug.h>
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <asm/emma2rh/emma2rh.h>
+
+/*
+ * the first level int-handler will jump here if it is a emma2rh irq
+ */
+asmlinkage void emma2rh_irq_dispatch(struct pt_regs *regs)
+{
+        u32 intStatus;
+        u32 bitmask;
+        u32 i;
+
+        intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_0)
+            & emma2rh_in32(EMMA2RH_BHIF_INT_EN_0);
+
+#ifdef EMMA2RH_SW_CASCADE
+        if (intStatus &
+            (1 << ((EMMA2RH_SW_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) {
+                u32 swIntStatus;
+                swIntStatus = emma2rh_in32(EMMA2RH_BHIF_SW_INT)
+                    & emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
+                for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
+                        if (swIntStatus & bitmask) {
+                                do_IRQ(EMMA2RH_SW_IRQ_BASE + i, regs);
+                                return;
+                        }
+                }
+        }
+#endif
+
+        for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
+                if (intStatus & bitmask) {
+                        do_IRQ(EMMA2RH_IRQ_BASE + i, regs);
+                        return;
+                }
+        }
+
+        intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_1)
+            & emma2rh_in32(EMMA2RH_BHIF_INT_EN_1);
+
+#ifdef EMMA2RH_GPIO_CASCADE
+        if (intStatus &
+            (1 << ((EMMA2RH_GPIO_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) {
+                u32 gpioIntStatus;
+                gpioIntStatus = emma2rh_in32(EMMA2RH_GPIO_INT_ST)
+                    & emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
+                for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
+                        if (gpioIntStatus & bitmask) {
+                                do_IRQ(EMMA2RH_GPIO_IRQ_BASE + i, regs);
+                                return;
+                        }
+                }
+        }
+#endif
+
+        for (i = 32, bitmask = 1; i < 64; i++, bitmask <<= 1) {
+                if (intStatus & bitmask) {
+                        do_IRQ(EMMA2RH_IRQ_BASE + i, regs);
+                        return;
+                }
+        }
+
+        intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_2)
+            & emma2rh_in32(EMMA2RH_BHIF_INT_EN_2);
+
+        for (i = 64, bitmask = 1; i < 96; i++, bitmask <<= 1) {
+                if (intStatus & bitmask) {
+                        do_IRQ(EMMA2RH_IRQ_BASE + i, regs);
+                        return;
+                }
+        }
+}
diff --git a/arch/mips/emma2rh/common/irq_emma2rh.c b/arch/mips/emma2rh/common/irq_emma2rh.c
new file mode 100644
index 000000000000..b886aa94ca90
--- /dev/null
+++ b/arch/mips/emma2rh/common/irq_emma2rh.c
@@ -0,0 +1,134 @@
+/*
+ *  arch/mips/emma2rh/common/irq_emma2rh.c
+ *      This file defines the irq handler for EMMA2RH.
+ *
+ *  Copyright (C) NEC Electronics Corporation 2005-2006
+ *
+ *  This file is based on the arch/mips/ddb5xxx/ddb5477/irq_5477.c
+ *
+ *      Copyright 2001 MontaVista Software 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.
+ *
+ *  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
+ */
+
+/*
+ * EMMA2RH defines 64 IRQs.
+ *
+ * This file exports one function:
+ *      emma2rh_irq_init(u32 irq_base);
+ */
+
+#include <linux/interrupt.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+
+#include <asm/debug.h>
+
+#include <asm/emma2rh/emma2rh.h>
+
+/* number of total irqs supported by EMMA2RH */
+#define NUM_EMMA2RH_IRQ         96
+
+static int emma2rh_irq_base = -1;
+
+void ll_emma2rh_irq_enable(int);
+void ll_emma2rh_irq_disable(int);
+
+static void emma2rh_irq_enable(unsigned int irq)
+{
+        ll_emma2rh_irq_enable(irq - emma2rh_irq_base);
+}
+
+static void emma2rh_irq_disable(unsigned int irq)
+{
+        ll_emma2rh_irq_disable(irq - emma2rh_irq_base);
+}
+
+static unsigned int emma2rh_irq_startup(unsigned int irq)
+{
+        emma2rh_irq_enable(irq);
+        return 0;
+}
+
+#define emma2rh_irq_shutdown    emma2rh_irq_disable
+
+static void emma2rh_irq_ack(unsigned int irq)
+{
+        /* disable interrupt - some handler will re-enable the irq
+         * and if the interrupt is leveled, we will have infinite loop
+         */
+        ll_emma2rh_irq_disable(irq - emma2rh_irq_base);
+}
+
+static void emma2rh_irq_end(unsigned int irq)
+{
+        if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+                ll_emma2rh_irq_enable(irq - emma2rh_irq_base);
+}
+
+hw_irq_controller emma2rh_irq_controller = {
+        .typename = "emma2rh_irq",
+        .startup = emma2rh_irq_startup,
+        .shutdown = emma2rh_irq_shutdown,
+        .enable = emma2rh_irq_enable,
+        .disable = emma2rh_irq_disable,
+        .ack = emma2rh_irq_ack,
+        .end = emma2rh_irq_end,
+        .set_affinity = NULL    /* no affinity stuff for UP */
+};
+
+void emma2rh_irq_init(u32 irq_base)
+{
+        u32 i;
+
+        for (i = irq_base; i < irq_base + NUM_EMMA2RH_IRQ; i++) {
+                irq_desc[i].status = IRQ_DISABLED;
+                irq_desc[i].action = NULL;
+                irq_desc[i].depth = 1;
+                irq_desc[i].handler = &emma2rh_irq_controller;
+        }
+
+        emma2rh_irq_base = irq_base;
+}
+
+void ll_emma2rh_irq_enable(int emma2rh_irq)
+{
+        u32 reg_value;
+        u32 reg_bitmask;
+        u32 reg_index;
+
+        reg_index = EMMA2RH_BHIF_INT_EN_0
+            + (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0)
+            * (emma2rh_irq / 32);
+        reg_value = emma2rh_in32(reg_index);
+        reg_bitmask = 0x1 << (emma2rh_irq % 32);
+        db_assert((reg_value & reg_bitmask) == 0);
+        emma2rh_out32(reg_index, reg_value | reg_bitmask);
+}
+
+void ll_emma2rh_irq_disable(int emma2rh_irq)
+{
+        u32 reg_value;
+        u32 reg_bitmask;
+        u32 reg_index;
+
+        reg_index = EMMA2RH_BHIF_INT_EN_0
+            + (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0)
+            * (emma2rh_irq / 32);
+        reg_value = emma2rh_in32(reg_index);
+        reg_bitmask = 0x1 << (emma2rh_irq % 32);
+        db_assert((reg_value & reg_bitmask) != 0);
+        emma2rh_out32(reg_index, reg_value & ~reg_bitmask);
+}
diff --git a/arch/mips/emma2rh/common/prom.c b/arch/mips/emma2rh/common/prom.c
new file mode 100644
index 000000000000..8bba0b02a204
--- /dev/null
+++ b/arch/mips/emma2rh/common/prom.c
@@ -0,0 +1,77 @@
+/*
+ *  arch/mips/emma2rh/common/prom.c
+ *      This file is prom file.
+ *
+ *  Copyright (C) NEC Electronics Corporation 2004-2006
+ *
+ *  This file is based on the arch/mips/ddb5xxx/common/prom.c
+ *
+ *      Copyright 2001 MontaVista Software 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.
+ *
+ *  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/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/bootmem.h>
+
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <asm/emma2rh/emma2rh.h>
+#include <asm/debug.h>
+
+const char *get_system_type(void)
+{
+        switch (mips_machtype) {
+        case MACH_NEC_MARKEINS:
+                return "NEC EMMA2RH Mark-eins";
+        default:
+                return "Unknown NEC board";
+        }
+}
+
+/* [jsun@junsun.net] PMON passes arguments in C main() style */
+void __init prom_init(void)
+{
+        int argc = fw_arg0;
+        char **arg = (char **)fw_arg1;
+        int i;
+
+        /* if user passes kernel args, ignore the default one */
+        if (argc > 1)
+                arcs_cmdline[0] = '\0';
+
+        /* arg[0] is "g", the rest is boot parameters */
+        for (i = 1; i < argc; i++) {
+                if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
+                    >= sizeof(arcs_cmdline))
+                        break;
+                strcat(arcs_cmdline, arg[i]);
+                strcat(arcs_cmdline, " ");
+        }
+
+        mips_machgroup = MACH_GROUP_NEC_EMMA2RH;
+
+#if defined(CONFIG_MARKEINS)
+        mips_machtype = MACH_NEC_MARKEINS;
+        add_memory_region(0, EMMA2RH_RAM_SIZE, BOOT_MEM_RAM);
+#endif
+
+}
+
+void __init prom_free_prom_memory(void)
+{
+}