5 files changed, 690 insertions, 0 deletions

diff --git a/arch/arm/mach-ebsa110/Makefile b/arch/arm/mach-ebsa110/Makefile
new file mode 100644
index 000000000000..6520ac835802
--- /dev/null
+++ b/arch/arm/mach-ebsa110/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+
+obj-y                   := core.o io.o
+obj-m                   :=
+obj-n                   :=
+obj-                    :=
+
+obj-$(CONFIG_LEDS)      += leds.o
diff --git a/arch/arm/mach-ebsa110/Makefile.boot b/arch/arm/mach-ebsa110/Makefile.boot
new file mode 100644
index 000000000000..232126044935
--- /dev/null
+++ b/arch/arm/mach-ebsa110/Makefile.boot
@@ -0,0 +1,4 @@
+   zreladdr-y   := 0x00008000
+params_phys-y   := 0x00000400
+initrd_phys-y   := 0x00800000
+
diff --git a/arch/arm/mach-ebsa110/core.c b/arch/arm/mach-ebsa110/core.c
new file mode 100644
index 000000000000..ef362d44949d
--- /dev/null
+++ b/arch/arm/mach-ebsa110/core.c
@@ -0,0 +1,245 @@
+/*
+ *  linux/arch/arm/mach-ebsa110/core.c
+ *
+ *  Copyright (C) 1998-2001 Russell King
+ *
+ * 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.
+ *
+ *  Extra MM routines for the EBSA-110 architecture
+ */
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/serial_8250.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/system.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/map.h>
+
+#include <asm/mach/time.h>
+
+#define IRQ_MASK                0xfe000000      /* read */
+#define IRQ_MSET                0xfe000000      /* write */
+#define IRQ_STAT                0xff000000      /* read */
+#define IRQ_MCLR                0xff000000      /* write */
+
+static void ebsa110_mask_irq(unsigned int irq)
+{
+        __raw_writeb(1 << irq, IRQ_MCLR);
+}
+
+static void ebsa110_unmask_irq(unsigned int irq)
+{
+        __raw_writeb(1 << irq, IRQ_MSET);
+}
+
+static struct irqchip ebsa110_irq_chip = {
+        .ack    = ebsa110_mask_irq,
+        .mask   = ebsa110_mask_irq,
+        .unmask = ebsa110_unmask_irq,
+};
+ 
+static void __init ebsa110_init_irq(void)
+{
+        unsigned long flags;
+        unsigned int irq;
+
+        local_irq_save(flags);
+        __raw_writeb(0xff, IRQ_MCLR);
+        __raw_writeb(0x55, IRQ_MSET);
+        __raw_writeb(0x00, IRQ_MSET);
+        if (__raw_readb(IRQ_MASK) != 0x55)
+                while (1);
+        __raw_writeb(0xff, IRQ_MCLR);   /* clear all interrupt enables */
+        local_irq_restore(flags);
+
+        for (irq = 0; irq < NR_IRQS; irq++) {
+                set_irq_chip(irq, &ebsa110_irq_chip);
+                set_irq_handler(irq, do_level_IRQ);
+                set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+        }
+}
+
+static struct map_desc ebsa110_io_desc[] __initdata = {
+        /*
+         * sparse external-decode ISAIO space
+         */
+        { IRQ_STAT,    TRICK4_PHYS, PGDIR_SIZE,  MT_DEVICE }, /* IRQ_STAT/IRQ_MCLR */
+        { IRQ_MASK,    TRICK3_PHYS, PGDIR_SIZE,  MT_DEVICE }, /* IRQ_MASK/IRQ_MSET */
+        { SOFT_BASE,   TRICK1_PHYS, PGDIR_SIZE,  MT_DEVICE }, /* SOFT_BASE */
+        { PIT_BASE,    TRICK0_PHYS, PGDIR_SIZE,  MT_DEVICE }, /* PIT_BASE */
+
+        /*
+         * self-decode ISAIO space
+         */
+        { ISAIO_BASE,  ISAIO_PHYS,  ISAIO_SIZE,  MT_DEVICE },
+        { ISAMEM_BASE, ISAMEM_PHYS, ISAMEM_SIZE, MT_DEVICE }
+};
+
+static void __init ebsa110_map_io(void)
+{
+        iotable_init(ebsa110_io_desc, ARRAY_SIZE(ebsa110_io_desc));
+}
+
+
+#define PIT_CTRL                (PIT_BASE + 0x0d)
+#define PIT_T2                  (PIT_BASE + 0x09)
+#define PIT_T1                  (PIT_BASE + 0x05)
+#define PIT_T0                  (PIT_BASE + 0x01)
+
+/*
+ * This is the rate at which your MCLK signal toggles (in Hz)
+ * This was measured on a 10 digit frequency counter sampling
+ * over 1 second.
+ */
+#define MCLK    47894000
+
+/*
+ * This is the rate at which the PIT timers get clocked
+ */
+#define CLKBY7  (MCLK / 7)
+
+/*
+ * This is the counter value.  We tick at 200Hz on this platform.
+ */
+#define COUNT   ((CLKBY7 + (HZ / 2)) / HZ)
+
+/*
+ * Get the time offset from the system PIT.  Note that if we have missed an
+ * interrupt, then the PIT counter will roll over (ie, be negative).
+ * This actually works out to be convenient.
+ */
+static unsigned long ebsa110_gettimeoffset(void)
+{
+        unsigned long offset, count;
+
+        __raw_writeb(0x40, PIT_CTRL);
+        count = __raw_readb(PIT_T1);
+        count |= __raw_readb(PIT_T1) << 8;
+
+        /*
+         * If count > COUNT, make the number negative.
+         */
+        if (count > COUNT)
+                count |= 0xffff0000;
+
+        offset = COUNT;
+        offset -= count;
+
+        /*
+         * `offset' is in units of timer counts.  Convert
+         * offset to units of microseconds.
+         */
+        offset = offset * (1000000 / HZ) / COUNT;
+
+        return offset;
+}
+
+static irqreturn_t
+ebsa110_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        u32 count;
+
+        write_seqlock(&xtime_lock);
+
+        /* latch and read timer 1 */
+        __raw_writeb(0x40, PIT_CTRL);
+        count = __raw_readb(PIT_T1);
+        count |= __raw_readb(PIT_T1) << 8;
+
+        count += COUNT;
+
+        __raw_writeb(count & 0xff, PIT_T1);
+        __raw_writeb(count >> 8, PIT_T1);
+
+        timer_tick(regs);
+
+        write_sequnlock(&xtime_lock);
+
+        return IRQ_HANDLED;
+}
+
+static struct irqaction ebsa110_timer_irq = {
+        .name           = "EBSA110 Timer Tick",
+        .flags          = SA_INTERRUPT,
+        .handler        = ebsa110_timer_interrupt
+};
+
+/*
+ * Set up timer interrupt.
+ */
+static void __init ebsa110_timer_init(void)
+{
+        /*
+         * Timer 1, mode 2, LSB/MSB
+         */
+        __raw_writeb(0x70, PIT_CTRL);
+        __raw_writeb(COUNT & 0xff, PIT_T1);
+        __raw_writeb(COUNT >> 8, PIT_T1);
+
+        setup_irq(IRQ_EBSA110_TIMER0, &ebsa110_timer_irq);
+}
+
+static struct sys_timer ebsa110_timer = {
+        .init           = ebsa110_timer_init,
+        .offset         = ebsa110_gettimeoffset,
+};
+
+static struct plat_serial8250_port serial_platform_data[] = {
+        {
+                .iobase         = 0x3f8,
+                .irq            = 1,
+                .uartclk        = 1843200,
+                .regshift       = 0,
+                .iotype         = UPIO_PORT,
+                .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+        },
+        {
+                .iobase         = 0x2f8,
+                .irq            = 2,
+                .uartclk        = 1843200,
+                .regshift       = 0,
+                .iotype         = UPIO_PORT,
+                .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+        },
+        { },
+};
+
+static struct platform_device serial_device = {
+        .name                   = "serial8250",
+        .id                     = 0,
+        .dev                    = {
+                .platform_data  = serial_platform_data,
+        },
+};
+
+static int __init ebsa110_init(void)
+{
+        return platform_device_register(&serial_device);
+}
+
+arch_initcall(ebsa110_init);
+
+MACHINE_START(EBSA110, "EBSA110")
+        MAINTAINER("Russell King")
+        BOOT_MEM(0x00000000, 0xe0000000, 0xe0000000)
+        BOOT_PARAMS(0x00000400)
+        DISABLE_PARPORT(0)
+        DISABLE_PARPORT(2)
+        SOFT_REBOOT
+        MAPIO(ebsa110_map_io)
+        INITIRQ(ebsa110_init_irq)
+        .timer          = &ebsa110_timer,
+MACHINE_END
diff --git a/arch/arm/mach-ebsa110/io.c b/arch/arm/mach-ebsa110/io.c
new file mode 100644
index 000000000000..ef7eb5dc91bd
--- /dev/null
+++ b/arch/arm/mach-ebsa110/io.c
@@ -0,0 +1,378 @@
+/*
+ *  linux/arch/arm/mach-ebsa110/isamem.c
+ *
+ *  Copyright (C) 2001 Russell King
+ *
+ * Perform "ISA" memory and IO accesses.  The EBSA110 has some "peculiarities"
+ * in the way it handles accesses to odd IO ports on 16-bit devices.  These
+ * devices have their D0-D15 lines connected to the processors D0-D15 lines.
+ * Since they expect all byte IO operations to be performed on D0-D7, and the
+ * StrongARM expects to transfer the byte to these odd addresses on D8-D15,
+ * we must use a trick to get the required behaviour.
+ *
+ * The trick employed here is to use long word stores to odd address -1.  The
+ * glue logic picks this up as a "trick" access, and asserts the LSB of the
+ * peripherals address bus, thereby accessing the odd IO port.  Meanwhile, the
+ * StrongARM transfers its data on D0-D7 as expected.
+ *
+ * Things get more interesting on the pass-1 EBSA110 - the PCMCIA controller
+ * wiring was screwed in such a way that it had limited memory space access.
+ * Luckily, the work-around for this is not too horrible.  See
+ * __isamem_convert_addr for the details.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+#include <asm/page.h>
+
+static void __iomem *__isamem_convert_addr(void __iomem *addr)
+{
+        u32 ret, a = (u32 __force) addr;
+
+        /*
+         * The PCMCIA controller is wired up as follows:
+         *        +---------+---------+---------+---------+---------+---------+
+         * PCMCIA | 2 2 2 2 | 1 1 1 1 | 1 1 1 1 | 1 1     |         |         |
+         *        | 3 2 1 0 | 9 8 7 6 | 5 4 3 2 | 1 0 9 8 | 7 6 5 4 | 3 2 1 0 |
+         *        +---------+---------+---------+---------+---------+---------+
+         *  CPU   | 2 2 2 2 | 2 1 1 1 | 1 1 1 1 | 1 1 1   |         |         |
+         *        | 4 3 2 1 | 0 9 9 8 | 7 6 5 4 | 3 2 0 9 | 8 7 6 5 | 4 3 2 x |
+         *        +---------+---------+---------+---------+---------+---------+
+         *
+         * This means that we can access PCMCIA regions as follows:
+         *      0x*10000 -> 0x*1ffff
+         *      0x*70000 -> 0x*7ffff
+         *      0x*90000 -> 0x*9ffff
+         *      0x*f0000 -> 0x*fffff
+         */
+        ret  = (a & 0xf803fe) << 1;
+        ret |= (a & 0x03fc00) << 2;
+
+        ret += 0xe8000000;
+
+        if ((a & 0x20000) == (a & 0x40000) >> 1)
+                return (void __iomem *)ret;
+
+        BUG();
+        return NULL;
+}
+
+/*
+ * read[bwl] and write[bwl]
+ */
+u8 __readb(void __iomem *addr)
+{
+        void __iomem *a = __isamem_convert_addr(addr);
+        u32 ret;
+
+        if ((unsigned long)addr & 1)
+                ret = __raw_readl(a);
+        else
+                ret = __raw_readb(a);
+        return ret;
+}
+
+u16 __readw(void __iomem *addr)
+{
+        void __iomem *a = __isamem_convert_addr(addr);
+
+        if ((unsigned long)addr & 1)
+                BUG();
+
+        return __raw_readw(a);
+}
+
+u32 __readl(void __iomem *addr)
+{
+        void __iomem *a = __isamem_convert_addr(addr);
+        u32 ret;
+
+        if ((unsigned long)addr & 3)
+                BUG();
+
+        ret = __raw_readw(a);
+        ret |= __raw_readw(a + 4) << 16;
+        return ret;
+}
+
+EXPORT_SYMBOL(__readb);
+EXPORT_SYMBOL(__readw);
+EXPORT_SYMBOL(__readl);
+
+void __writeb(u8 val, void __iomem *addr)
+{
+        void __iomem *a = __isamem_convert_addr(addr);
+
+        if ((unsigned long)addr & 1)
+                __raw_writel(val, a);
+        else
+                __raw_writeb(val, a);
+}
+
+void __writew(u16 val, void __iomem *addr)
+{
+        void __iomem *a = __isamem_convert_addr(addr);
+
+        if ((unsigned long)addr & 1)
+                BUG();
+
+        __raw_writew(val, a);
+}
+
+void __writel(u32 val, void __iomem *addr)
+{
+        void __iomem *a = __isamem_convert_addr(addr);
+
+        if ((unsigned long)addr & 3)
+                BUG();
+
+        __raw_writew(val, a);
+        __raw_writew(val >> 16, a + 4);
+}
+
+EXPORT_SYMBOL(__writeb);
+EXPORT_SYMBOL(__writew);
+EXPORT_SYMBOL(__writel);
+
+#define SUPERIO_PORT(p) \
+        (((p) >> 3) == (0x3f8 >> 3) || \
+         ((p) >> 3) == (0x2f8 >> 3) || \
+         ((p) >> 3) == (0x378 >> 3))
+
+/*
+ * We're addressing an 8 or 16-bit peripheral which tranfers
+ * odd addresses on the low ISA byte lane.
+ */
+u8 __inb8(unsigned int port)
+{
+        u32 ret;
+
+        /*
+         * The SuperIO registers use sane addressing techniques...
+         */
+        if (SUPERIO_PORT(port))
+                ret = __raw_readb((void __iomem *)ISAIO_BASE + (port << 2));
+        else {
+                void __iomem *a = (void __iomem *)ISAIO_BASE + ((port & ~1) << 1);
+
+                /*
+                 * Shame nothing else does
+                 */
+                if (port & 1)
+                        ret = __raw_readl(a);
+                else
+                        ret = __raw_readb(a);
+        }
+        return ret;
+}
+
+/*
+ * We're addressing a 16-bit peripheral which transfers odd
+ * addresses on the high ISA byte lane.
+ */
+u8 __inb16(unsigned int port)
+{
+        unsigned int offset;
+
+        /*
+         * The SuperIO registers use sane addressing techniques...
+         */
+        if (SUPERIO_PORT(port))
+                offset = port << 2;
+        else
+                offset = (port & ~1) << 1 | (port & 1);
+
+        return __raw_readb((void __iomem *)ISAIO_BASE + offset);
+}
+
+u16 __inw(unsigned int port)
+{
+        unsigned int offset;
+
+        /*
+         * The SuperIO registers use sane addressing techniques...
+         */
+        if (SUPERIO_PORT(port))
+                offset = port << 2;
+        else {
+                offset = port << 1;
+                BUG_ON(port & 1);
+        }
+        return __raw_readw((void __iomem *)ISAIO_BASE + offset);
+}
+
+/*
+ * Fake a 32-bit read with two 16-bit reads.  Needed for 3c589.
+ */
+u32 __inl(unsigned int port)
+{
+        void __iomem *a;
+
+        if (SUPERIO_PORT(port) || port & 3)
+                BUG();
+
+        a = (void __iomem *)ISAIO_BASE + ((port & ~1) << 1);
+
+        return __raw_readw(a) | __raw_readw(a + 4) << 16;
+}
+
+EXPORT_SYMBOL(__inb8);
+EXPORT_SYMBOL(__inb16);
+EXPORT_SYMBOL(__inw);
+EXPORT_SYMBOL(__inl);
+
+void __outb8(u8 val, unsigned int port)
+{
+        /*
+         * The SuperIO registers use sane addressing techniques...
+         */
+        if (SUPERIO_PORT(port))
+                __raw_writeb(val, (void __iomem *)ISAIO_BASE + (port << 2));
+        else {
+                void __iomem *a = (void __iomem *)ISAIO_BASE + ((port & ~1) << 1);
+
+                /*
+                 * Shame nothing else does
+                 */
+                if (port & 1)
+                        __raw_writel(val, a);
+                else
+                        __raw_writeb(val, a);
+        }
+}
+
+void __outb16(u8 val, unsigned int port)
+{
+        unsigned int offset;
+
+        /*
+         * The SuperIO registers use sane addressing techniques...
+         */
+        if (SUPERIO_PORT(port))
+                offset = port << 2;
+        else
+                offset = (port & ~1) << 1 | (port & 1);
+
+        __raw_writeb(val, (void __iomem *)ISAIO_BASE + offset);
+}
+
+void __outw(u16 val, unsigned int port)
+{
+        unsigned int offset;
+
+        /*
+         * The SuperIO registers use sane addressing techniques...
+         */
+        if (SUPERIO_PORT(port))
+                offset = port << 2;
+        else {
+                offset = port << 1;
+                BUG_ON(port & 1);
+        }
+        __raw_writew(val, (void __iomem *)ISAIO_BASE + offset);
+}
+
+void __outl(u32 val, unsigned int port)
+{
+        BUG();
+}
+
+EXPORT_SYMBOL(__outb8);
+EXPORT_SYMBOL(__outb16);
+EXPORT_SYMBOL(__outw);
+EXPORT_SYMBOL(__outl);
+
+void outsb(unsigned int port, const void *from, int len)
+{
+        u32 off;
+
+        if (SUPERIO_PORT(port))
+                off = port << 2;
+        else {
+                off = (port & ~1) << 1;
+                if (port & 1)
+                        BUG();
+        }
+
+        __raw_writesb((void __iomem *)ISAIO_BASE + off, from, len);
+}
+
+void insb(unsigned int port, void *from, int len)
+{
+        u32 off;
+
+        if (SUPERIO_PORT(port))
+                off = port << 2;
+        else {
+                off = (port & ~1) << 1;
+                if (port & 1)
+                        BUG();
+        }
+
+        __raw_readsb((void __iomem *)ISAIO_BASE + off, from, len);
+}
+
+EXPORT_SYMBOL(outsb);
+EXPORT_SYMBOL(insb);
+
+void outsw(unsigned int port, const void *from, int len)
+{
+        u32 off;
+
+        if (SUPERIO_PORT(port))
+                off = port << 2;
+        else {
+                off = (port & ~1) << 1;
+                if (port & 1)
+                        BUG();
+        }
+
+        __raw_writesw((void __iomem *)ISAIO_BASE + off, from, len);
+}
+
+void insw(unsigned int port, void *from, int len)
+{
+        u32 off;
+
+        if (SUPERIO_PORT(port))
+                off = port << 2;
+        else {
+                off = (port & ~1) << 1;
+                if (port & 1)
+                        BUG();
+        }
+
+        __raw_readsw((void __iomem *)ISAIO_BASE + off, from, len);
+}
+
+EXPORT_SYMBOL(outsw);
+EXPORT_SYMBOL(insw);
+
+/*
+ * We implement these as 16-bit insw/outsw, mainly for
+ * 3c589 cards.
+ */
+void outsl(unsigned int port, const void *from, int len)
+{
+        u32 off = port << 1;
+
+        if (SUPERIO_PORT(port) || port & 3)
+                BUG();
+
+        __raw_writesw((void __iomem *)ISAIO_BASE + off, from, len << 1);
+}
+
+void insl(unsigned int port, void *from, int len)
+{
+        u32 off = port << 1;
+
+        if (SUPERIO_PORT(port) || port & 3)
+                BUG();
+
+        __raw_readsw((void __iomem *)ISAIO_BASE + off, from, len << 1);
+}
+
+EXPORT_SYMBOL(outsl);
+EXPORT_SYMBOL(insl);
diff --git a/arch/arm/mach-ebsa110/leds.c b/arch/arm/mach-ebsa110/leds.c
new file mode 100644
index 000000000000..3bc8c5e708e6
--- /dev/null
+++ b/arch/arm/mach-ebsa110/leds.c
@@ -0,0 +1,51 @@
+/*
+ *  linux/arch/arm/mach-ebsa110/leds.c
+ *
+ *  Copyright (C) 1998 Russell King
+ *
+ * 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.
+ *
+ *  EBSA-110 LED control routines.  We use the led as follows:
+ *
+ *   - Red - toggles state every 50 timer interrupts
+ */
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/system.h>
+#include <asm/mach-types.h>
+
+static spinlock_t leds_lock;
+
+static void ebsa110_leds_event(led_event_t ledevt)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&leds_lock, flags);
+
+        switch(ledevt) {
+        case led_timer:
+                *(volatile unsigned char *)SOFT_BASE ^= 128;
+                break;
+
+        default:
+                break;
+        }
+
+        spin_unlock_irqrestore(&leds_lock, flags);
+}
+
+static int __init leds_init(void)
+{
+        if (machine_is_ebsa110())
+                leds_event = ebsa110_leds_event;
+
+        return 0;
+}
+
+__initcall(leds_init);