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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/mach-ebsa110
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/mach-ebsa110')
-rw-r--r--arch/arm/mach-ebsa110/Makefile12
-rw-r--r--arch/arm/mach-ebsa110/Makefile.boot4
-rw-r--r--arch/arm/mach-ebsa110/core.c245
-rw-r--r--arch/arm/mach-ebsa110/io.c378
-rw-r--r--arch/arm/mach-ebsa110/leds.c51
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);