From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Mon, 6 May 2024 03:02:30 +0200
Subject: Adding upstream version 4.19.249.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/arm/mach-footbridge/Kconfig                   |  98 +++
 arch/arm/mach-footbridge/Makefile                  |  23 +
 arch/arm/mach-footbridge/Makefile.boot             |   4 +
 arch/arm/mach-footbridge/cats-hw.c                 |  98 +++
 arch/arm/mach-footbridge/cats-pci.c                |  64 ++
 arch/arm/mach-footbridge/common.c                  | 268 +++++++
 arch/arm/mach-footbridge/common.h                  |  15 +
 arch/arm/mach-footbridge/dc21285-timer.c           | 141 ++++
 arch/arm/mach-footbridge/dc21285.c                 | 366 ++++++++++
 arch/arm/mach-footbridge/dma.c                     |  58 ++
 arch/arm/mach-footbridge/ebsa285-pci.c             |  48 ++
 arch/arm/mach-footbridge/ebsa285.c                 | 124 ++++
 .../arm/mach-footbridge/include/mach/entry-macro.S | 107 +++
 arch/arm/mach-footbridge/include/mach/hardware.h   |  99 +++
 arch/arm/mach-footbridge/include/mach/io.h         |  23 +
 arch/arm/mach-footbridge/include/mach/irqs.h       |  97 +++
 arch/arm/mach-footbridge/include/mach/isa-dma.h    |  26 +
 arch/arm/mach-footbridge/include/mach/memory.h     |  64 ++
 arch/arm/mach-footbridge/include/mach/uncompress.h |  37 +
 arch/arm/mach-footbridge/isa-irq.c                 | 182 +++++
 arch/arm/mach-footbridge/isa-rtc.c                 |  58 ++
 arch/arm/mach-footbridge/isa-timer.c               |  41 ++
 arch/arm/mach-footbridge/isa.c                     | 101 +++
 arch/arm/mach-footbridge/netwinder-hw.c            | 772 +++++++++++++++++++++
 arch/arm/mach-footbridge/netwinder-pci.c           |  62 ++
 arch/arm/mach-footbridge/personal-pci.c            |  57 ++
 arch/arm/mach-footbridge/personal.c                |  25 +
 27 files changed, 3058 insertions(+)
 create mode 100644 arch/arm/mach-footbridge/Kconfig
 create mode 100644 arch/arm/mach-footbridge/Makefile
 create mode 100644 arch/arm/mach-footbridge/Makefile.boot
 create mode 100644 arch/arm/mach-footbridge/cats-hw.c
 create mode 100644 arch/arm/mach-footbridge/cats-pci.c
 create mode 100644 arch/arm/mach-footbridge/common.c
 create mode 100644 arch/arm/mach-footbridge/common.h
 create mode 100644 arch/arm/mach-footbridge/dc21285-timer.c
 create mode 100644 arch/arm/mach-footbridge/dc21285.c
 create mode 100644 arch/arm/mach-footbridge/dma.c
 create mode 100644 arch/arm/mach-footbridge/ebsa285-pci.c
 create mode 100644 arch/arm/mach-footbridge/ebsa285.c
 create mode 100644 arch/arm/mach-footbridge/include/mach/entry-macro.S
 create mode 100644 arch/arm/mach-footbridge/include/mach/hardware.h
 create mode 100644 arch/arm/mach-footbridge/include/mach/io.h
 create mode 100644 arch/arm/mach-footbridge/include/mach/irqs.h
 create mode 100644 arch/arm/mach-footbridge/include/mach/isa-dma.h
 create mode 100644 arch/arm/mach-footbridge/include/mach/memory.h
 create mode 100644 arch/arm/mach-footbridge/include/mach/uncompress.h
 create mode 100644 arch/arm/mach-footbridge/isa-irq.c
 create mode 100644 arch/arm/mach-footbridge/isa-rtc.c
 create mode 100644 arch/arm/mach-footbridge/isa-timer.c
 create mode 100644 arch/arm/mach-footbridge/isa.c
 create mode 100644 arch/arm/mach-footbridge/netwinder-hw.c
 create mode 100644 arch/arm/mach-footbridge/netwinder-pci.c
 create mode 100644 arch/arm/mach-footbridge/personal-pci.c
 create mode 100644 arch/arm/mach-footbridge/personal.c

(limited to 'arch/arm/mach-footbridge')

diff --git a/arch/arm/mach-footbridge/Kconfig b/arch/arm/mach-footbridge/Kconfig
new file mode 100644
index 000000000..cbbdd84cf
--- /dev/null
+++ b/arch/arm/mach-footbridge/Kconfig
@@ -0,0 +1,98 @@
+if ARCH_FOOTBRIDGE
+
+menu "Footbridge Implementations"
+
+config ARCH_CATS
+	bool "CATS"
+	select CLKEVT_I8253
+	select CLKSRC_I8253
+	select FOOTBRIDGE_HOST
+	select ISA
+	select ISA_DMA
+	select PCI
+	help
+	  Say Y here if you intend to run this kernel on the CATS.
+
+	  Saying N will reduce the size of the Footbridge kernel.
+
+config ARCH_PERSONAL_SERVER
+	bool "Compaq Personal Server"
+	select FOOTBRIDGE_HOST
+	select ISA
+	select ISA_DMA
+	select PCI
+	---help---
+	  Say Y here if you intend to run this kernel on the Compaq
+	  Personal Server.
+
+	  Saying N will reduce the size of the Footbridge kernel.
+
+	  The Compaq Personal Server is not available for purchase.
+	  There are no product plans beyond the current research
+	  prototypes at this time.  Information is available at:
+
+	  <http://www.crl.hpl.hp.com/projects/personalserver/>
+
+	  If you have any questions or comments about the  Compaq Personal
+	  Server, send e-mail to <skiff@crl.dec.com>.
+
+config ARCH_EBSA285_ADDIN
+	bool "EBSA285 (addin mode)"
+	select ARCH_EBSA285
+	select FOOTBRIDGE_ADDIN
+	help
+	  Say Y here if you intend to run this kernel on the EBSA285 card
+	  in addin mode.
+
+	  Saying N will reduce the size of the Footbridge kernel.
+
+config ARCH_EBSA285_HOST
+	bool "EBSA285 (host mode)"
+	select ARCH_EBSA285
+	select FOOTBRIDGE_HOST
+	select ISA
+	select ISA_DMA
+	select ARCH_MAY_HAVE_PC_FDC
+	select PCI
+	help
+	  Say Y here if you intend to run this kernel on the EBSA285 card
+	  in host ("central function") mode.
+
+	  Saying N will reduce the size of the Footbridge kernel.
+
+config ARCH_NETWINDER
+	bool "NetWinder"
+	select CLKEVT_I8253
+	select CLKSRC_I8253
+	select FOOTBRIDGE_HOST
+	select ISA
+	select ISA_DMA
+	select PCI
+	help
+	  Say Y here if you intend to run this kernel on the Rebel.COM
+	  NetWinder.  Information about this machine can be found at:
+
+	  <http://www.netwinder.org/>
+
+	  Saying N will reduce the size of the Footbridge kernel.
+
+endmenu
+
+# Footbridge support
+config FOOTBRIDGE
+	bool
+
+# Footbridge in host mode
+config FOOTBRIDGE_HOST
+	bool
+	select ARCH_MIGHT_HAVE_PC_SERIO
+
+# Footbridge in addin mode
+config FOOTBRIDGE_ADDIN
+	bool
+
+# EBSA285 board in either host or addin mode
+config ARCH_EBSA285
+	bool
+
+endif
diff --git a/arch/arm/mach-footbridge/Makefile b/arch/arm/mach-footbridge/Makefile
new file mode 100644
index 000000000..a09f1041f
--- /dev/null
+++ b/arch/arm/mach-footbridge/Makefile
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+
+obj-y			:= common.o dma.o isa-irq.o
+
+pci-y			+= dc21285.o
+pci-$(CONFIG_ARCH_CATS) += cats-pci.o
+pci-$(CONFIG_ARCH_EBSA285_HOST) += ebsa285-pci.o
+pci-$(CONFIG_ARCH_NETWINDER) += netwinder-pci.o
+pci-$(CONFIG_ARCH_PERSONAL_SERVER) += personal-pci.o
+
+obj-$(CONFIG_ARCH_CATS) += cats-hw.o isa-timer.o
+obj-$(CONFIG_ARCH_EBSA285) += ebsa285.o dc21285-timer.o
+obj-$(CONFIG_ARCH_NETWINDER) += netwinder-hw.o isa-timer.o
+obj-$(CONFIG_ARCH_PERSONAL_SERVER) += personal.o dc21285-timer.o
+
+obj-$(CONFIG_PCI)	+=$(pci-y)
+
+obj-$(CONFIG_ISA)	+= isa.o isa-rtc.o
diff --git a/arch/arm/mach-footbridge/Makefile.boot b/arch/arm/mach-footbridge/Makefile.boot
new file mode 100644
index 000000000..ff0a4b5b0
--- /dev/null
+++ b/arch/arm/mach-footbridge/Makefile.boot
@@ -0,0 +1,4 @@
+   zreladdr-y	+= 0x00008000
+params_phys-y	:= 0x00000100
+initrd_phys-y	:= 0x00800000
+
diff --git a/arch/arm/mach-footbridge/cats-hw.c b/arch/arm/mach-footbridge/cats-hw.c
new file mode 100644
index 000000000..e575dc069
--- /dev/null
+++ b/arch/arm/mach-footbridge/cats-hw.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/cats-hw.c
+ *
+ * CATS machine fixup
+ *
+ * Copyright (C) 1998, 1999 Russell King, Phil Blundell
+ */
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/screen_info.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware/dec21285.h>
+#include <asm/mach-types.h>
+#include <asm/setup.h>
+
+#include <asm/mach/arch.h>
+
+#include "common.h"
+
+#define CFG_PORT	0x370
+#define INDEX_PORT	(CFG_PORT)
+#define DATA_PORT	(CFG_PORT + 1)
+
+static int __init cats_hw_init(void)
+{
+	if (machine_is_cats()) {
+		/* Set Aladdin to CONFIGURE mode */
+		outb(0x51, CFG_PORT);
+		outb(0x23, CFG_PORT);
+
+		/* Select logical device 3 */
+		outb(0x07, INDEX_PORT);
+		outb(0x03, DATA_PORT);
+
+		/* Set parallel port to DMA channel 3, ECP+EPP1.9, 
+		   enable EPP timeout */
+		outb(0x74, INDEX_PORT);
+		outb(0x03, DATA_PORT);
+	
+		outb(0xf0, INDEX_PORT);
+		outb(0x0f, DATA_PORT);
+
+		outb(0xf1, INDEX_PORT);
+		outb(0x07, DATA_PORT);
+
+		/* Select logical device 4 */
+		outb(0x07, INDEX_PORT);
+		outb(0x04, DATA_PORT);
+
+		/* UART1 high speed mode */
+		outb(0xf0, INDEX_PORT);
+		outb(0x02, DATA_PORT);
+
+		/* Select logical device 5 */
+		outb(0x07, INDEX_PORT);
+		outb(0x05, DATA_PORT);
+
+		/* UART2 high speed mode */
+		outb(0xf0, INDEX_PORT);
+		outb(0x02, DATA_PORT);
+
+		/* Set Aladdin to RUN mode */
+		outb(0xbb, CFG_PORT);
+	}
+
+	return 0;
+}
+
+__initcall(cats_hw_init);
+
+/*
+ * CATS uses soft-reboot by default, since
+ * hard reboots fail on early boards.
+ */
+static void __init
+fixup_cats(struct tag *tags, char **cmdline)
+{
+#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
+	screen_info.orig_video_lines  = 25;
+	screen_info.orig_video_points = 16;
+	screen_info.orig_y = 24;
+#endif
+}
+
+MACHINE_START(CATS, "Chalice-CATS")
+	/* Maintainer: Philip Blundell */
+	.atag_offset	= 0x100,
+	.reboot_mode	= REBOOT_SOFT,
+	.fixup		= fixup_cats,
+	.map_io		= footbridge_map_io,
+	.init_irq	= footbridge_init_irq,
+	.init_time	= isa_timer_init,
+	.restart	= footbridge_restart,
+MACHINE_END
diff --git a/arch/arm/mach-footbridge/cats-pci.c b/arch/arm/mach-footbridge/cats-pci.c
new file mode 100644
index 000000000..90b1e9be4
--- /dev/null
+++ b/arch/arm/mach-footbridge/cats-pci.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/cats-pci.c
+ *
+ * PCI bios-type initialisation for PCI machines
+ *
+ * Bits taken from various places.
+ */
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/mach-types.h>
+
+/* cats host-specific stuff */
+static int irqmap_cats[] = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
+
+static u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin)
+{
+	return 0;
+}
+
+static int cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	if (dev->irq >= 255)
+		return -1;	/* not a valid interrupt. */
+
+	if (dev->irq >= 128)
+		return dev->irq & 0x1f;
+
+	if (dev->irq >= 1 && dev->irq <= 4)
+		return irqmap_cats[dev->irq - 1];
+
+	if (dev->irq != 0)
+		printk("PCI: device %02x:%02x has unknown irq line %x\n",
+		       dev->bus->number, dev->devfn, dev->irq);
+
+	return -1;
+}
+
+/*
+ * why not the standard PCI swizzle?  does this prevent 4-port tulip
+ * cards being used (ie, pci-pci bridge based cards)?
+ */
+static struct hw_pci cats_pci __initdata = {
+	.swizzle		= cats_no_swizzle,
+	.map_irq		= cats_map_irq,
+	.nr_controllers		= 1,
+	.ops			= &dc21285_ops,
+	.setup			= dc21285_setup,
+	.preinit		= dc21285_preinit,
+	.postinit		= dc21285_postinit,
+};
+
+static int __init cats_pci_init(void)
+{
+	if (machine_is_cats())
+		pci_common_init(&cats_pci);
+	return 0;
+}
+
+subsys_initcall(cats_pci_init);
diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
new file mode 100644
index 000000000..0f0c9e040
--- /dev/null
+++ b/arch/arm/mach-footbridge/common.c
@@ -0,0 +1,268 @@
+/*
+ *  linux/arch/arm/mach-footbridge/common.c
+ *
+ *  Copyright (C) 1998-2000 Russell King, Dave Gilbert.
+ *
+ * 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.
+ */
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <video/vga.h>
+
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+#include <asm/setup.h>
+#include <asm/system_misc.h>
+#include <asm/hardware/dec21285.h>
+
+#include <asm/mach/irq.h>
+#include <asm/mach/map.h>
+#include <asm/mach/pci.h>
+
+#include "common.h"
+
+unsigned int mem_fclk_21285 = 50000000;
+
+EXPORT_SYMBOL(mem_fclk_21285);
+
+static int __init early_fclk(char *arg)
+{
+	mem_fclk_21285 = simple_strtoul(arg, NULL, 0);
+	return 0;
+}
+
+early_param("mem_fclk_21285", early_fclk);
+
+static int __init parse_tag_memclk(const struct tag *tag)
+{
+	mem_fclk_21285 = tag->u.memclk.fmemclk;
+	return 0;
+}
+
+__tagtable(ATAG_MEMCLK, parse_tag_memclk);
+
+/*
+ * Footbridge IRQ translation table
+ *  Converts from our IRQ numbers into FootBridge masks
+ */
+static const int fb_irq_mask[] = {
+	IRQ_MASK_UART_RX,	/*  0 */
+	IRQ_MASK_UART_TX,	/*  1 */
+	IRQ_MASK_TIMER1,	/*  2 */
+	IRQ_MASK_TIMER2,	/*  3 */
+	IRQ_MASK_TIMER3,	/*  4 */
+	IRQ_MASK_IN0,		/*  5 */
+	IRQ_MASK_IN1,		/*  6 */
+	IRQ_MASK_IN2,		/*  7 */
+	IRQ_MASK_IN3,		/*  8 */
+	IRQ_MASK_DOORBELLHOST,	/*  9 */
+	IRQ_MASK_DMA1,		/* 10 */
+	IRQ_MASK_DMA2,		/* 11 */
+	IRQ_MASK_PCI,		/* 12 */
+	IRQ_MASK_SDRAMPARITY,	/* 13 */
+	IRQ_MASK_I2OINPOST,	/* 14 */
+	IRQ_MASK_PCI_ABORT,	/* 15 */
+	IRQ_MASK_PCI_SERR,	/* 16 */
+	IRQ_MASK_DISCARD_TIMER,	/* 17 */
+	IRQ_MASK_PCI_DPERR,	/* 18 */
+	IRQ_MASK_PCI_PERR,	/* 19 */
+};
+
+static void fb_mask_irq(struct irq_data *d)
+{
+	*CSR_IRQ_DISABLE = fb_irq_mask[_DC21285_INR(d->irq)];
+}
+
+static void fb_unmask_irq(struct irq_data *d)
+{
+	*CSR_IRQ_ENABLE = fb_irq_mask[_DC21285_INR(d->irq)];
+}
+
+static struct irq_chip fb_chip = {
+	.irq_ack	= fb_mask_irq,
+	.irq_mask	= fb_mask_irq,
+	.irq_unmask	= fb_unmask_irq,
+};
+
+static void __init __fb_init_irq(void)
+{
+	unsigned int irq;
+
+	/*
+	 * setup DC21285 IRQs
+	 */
+	*CSR_IRQ_DISABLE = -1;
+	*CSR_FIQ_DISABLE = -1;
+
+	for (irq = _DC21285_IRQ(0); irq < _DC21285_IRQ(20); irq++) {
+		irq_set_chip_and_handler(irq, &fb_chip, handle_level_irq);
+		irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
+	}
+}
+
+void __init footbridge_init_irq(void)
+{
+	__fb_init_irq();
+
+	if (!footbridge_cfn_mode())
+		return;
+
+	if (machine_is_ebsa285())
+		/* The following is dependent on which slot
+		 * you plug the Southbridge card into.  We
+		 * currently assume that you plug it into
+		 * the right-hand most slot.
+		 */
+		isa_init_irq(IRQ_PCI);
+
+	if (machine_is_cats())
+		isa_init_irq(IRQ_IN2);
+
+	if (machine_is_netwinder())
+		isa_init_irq(IRQ_IN3);
+}
+
+/*
+ * Common mapping for all systems.  Note that the outbound write flush is
+ * commented out since there is a "No Fix" problem with it.  Not mapping
+ * it means that we have extra bullet protection on our feet.
+ */
+static struct map_desc fb_common_io_desc[] __initdata = {
+	{
+		.virtual	= ARMCSR_BASE,
+		.pfn		= __phys_to_pfn(DC21285_ARMCSR_BASE),
+		.length		= ARMCSR_SIZE,
+		.type		= MT_DEVICE,
+	}
+};
+
+/*
+ * The mapping when the footbridge is in host mode.  We don't map any of
+ * this when we are in add-in mode.
+ */
+static struct map_desc ebsa285_host_io_desc[] __initdata = {
+#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_FOOTBRIDGE_HOST)
+	{
+		.virtual	= PCIMEM_BASE,
+		.pfn		= __phys_to_pfn(DC21285_PCI_MEM),
+		.length		= PCIMEM_SIZE,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= PCICFG0_BASE,
+		.pfn		= __phys_to_pfn(DC21285_PCI_TYPE_0_CONFIG),
+		.length		= PCICFG0_SIZE,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= PCICFG1_BASE,
+		.pfn		= __phys_to_pfn(DC21285_PCI_TYPE_1_CONFIG),
+		.length		= PCICFG1_SIZE,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= PCIIACK_BASE,
+		.pfn		= __phys_to_pfn(DC21285_PCI_IACK),
+		.length		= PCIIACK_SIZE,
+		.type		= MT_DEVICE,
+	},
+#endif
+};
+
+void __init footbridge_map_io(void)
+{
+	/*
+	 * Set up the common mapping first; we need this to
+	 * determine whether we're in host mode or not.
+	 */
+	iotable_init(fb_common_io_desc, ARRAY_SIZE(fb_common_io_desc));
+
+	/*
+	 * Now, work out what we've got to map in addition on this
+	 * platform.
+	 */
+	if (footbridge_cfn_mode()) {
+		iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
+		pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO));
+	}
+
+	vga_base = PCIMEM_BASE;
+}
+
+void footbridge_restart(enum reboot_mode mode, const char *cmd)
+{
+	if (mode == REBOOT_SOFT) {
+		/* Jump into the ROM */
+		soft_restart(0x41000000);
+	} else {
+		/*
+		 * Force the watchdog to do a CPU reset.
+		 *
+		 * After making sure that the watchdog is disabled
+		 * (so we can change the timer registers) we first
+		 * enable the timer to autoreload itself.  Next, the
+		 * timer interval is set really short and any
+		 * current interrupt request is cleared (so we can
+		 * see an edge transition).  Finally, TIMER4 is
+		 * enabled as the watchdog.
+		 */
+		*CSR_SA110_CNTL &= ~(1 << 13);
+		*CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE |
+				   TIMER_CNTL_AUTORELOAD |
+				   TIMER_CNTL_DIV16;
+		*CSR_TIMER4_LOAD = 0x2;
+		*CSR_TIMER4_CLR  = 0;
+		*CSR_SA110_CNTL |= (1 << 13);
+	}
+}
+
+#ifdef CONFIG_FOOTBRIDGE_ADDIN
+
+static inline unsigned long fb_bus_sdram_offset(void)
+{
+	return *CSR_PCISDRAMBASE & 0xfffffff0;
+}
+
+/*
+ * These two functions convert virtual addresses to PCI addresses and PCI
+ * addresses to virtual addresses.  Note that it is only legal to use these
+ * on memory obtained via get_zeroed_page or kmalloc.
+ */
+unsigned long __virt_to_bus(unsigned long res)
+{
+	WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
+
+	return res + (fb_bus_sdram_offset() - PAGE_OFFSET);
+}
+EXPORT_SYMBOL(__virt_to_bus);
+
+unsigned long __bus_to_virt(unsigned long res)
+{
+	res = res - (fb_bus_sdram_offset() - PAGE_OFFSET);
+
+	WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
+
+	return res;
+}
+EXPORT_SYMBOL(__bus_to_virt);
+
+unsigned long __pfn_to_bus(unsigned long pfn)
+{
+	return __pfn_to_phys(pfn) + (fb_bus_sdram_offset() - PHYS_OFFSET);
+}
+EXPORT_SYMBOL(__pfn_to_bus);
+
+unsigned long __bus_to_pfn(unsigned long bus)
+{
+	return __phys_to_pfn(bus - (fb_bus_sdram_offset() - PHYS_OFFSET));
+}
+EXPORT_SYMBOL(__bus_to_pfn);
+
+#endif
diff --git a/arch/arm/mach-footbridge/common.h b/arch/arm/mach-footbridge/common.h
new file mode 100644
index 000000000..e12587db5
--- /dev/null
+++ b/arch/arm/mach-footbridge/common.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/reboot.h>
+
+extern void footbridge_timer_init(void);
+extern void isa_timer_init(void);
+
+extern void isa_rtc_init(void);
+
+extern void footbridge_map_io(void);
+extern void footbridge_init_irq(void);
+
+extern void isa_init_irq(unsigned int irq);
+extern void footbridge_restart(enum reboot_mode, const char *);
+
+extern void footbridge_sched_clock(void);
diff --git a/arch/arm/mach-footbridge/dc21285-timer.c b/arch/arm/mach-footbridge/dc21285-timer.c
new file mode 100644
index 000000000..f76212d2d
--- /dev/null
+++ b/arch/arm/mach-footbridge/dc21285-timer.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/arch/arm/mach-footbridge/dc21285-timer.c
+ *
+ *  Copyright (C) 1998 Russell King.
+ *  Copyright (C) 1998 Phil Blundell
+ */
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/sched_clock.h>
+
+#include <asm/irq.h>
+
+#include <asm/hardware/dec21285.h>
+#include <asm/mach/time.h>
+#include <asm/system_info.h>
+
+#include "common.h"
+
+static u64 cksrc_dc21285_read(struct clocksource *cs)
+{
+	return cs->mask - *CSR_TIMER2_VALUE;
+}
+
+static int cksrc_dc21285_enable(struct clocksource *cs)
+{
+	*CSR_TIMER2_LOAD = cs->mask;
+	*CSR_TIMER2_CLR = 0;
+	*CSR_TIMER2_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_DIV16;
+	return 0;
+}
+
+static void cksrc_dc21285_disable(struct clocksource *cs)
+{
+	*CSR_TIMER2_CNTL = 0;
+}
+
+static struct clocksource cksrc_dc21285 = {
+	.name		= "dc21285_timer2",
+	.rating		= 200,
+	.read		= cksrc_dc21285_read,
+	.enable		= cksrc_dc21285_enable,
+	.disable	= cksrc_dc21285_disable,
+	.mask		= CLOCKSOURCE_MASK(24),
+	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static int ckevt_dc21285_set_next_event(unsigned long delta,
+	struct clock_event_device *c)
+{
+	*CSR_TIMER1_CLR = 0;
+	*CSR_TIMER1_LOAD = delta;
+	*CSR_TIMER1_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_DIV16;
+
+	return 0;
+}
+
+static int ckevt_dc21285_shutdown(struct clock_event_device *c)
+{
+	*CSR_TIMER1_CNTL = 0;
+	return 0;
+}
+
+static int ckevt_dc21285_set_periodic(struct clock_event_device *c)
+{
+	*CSR_TIMER1_CLR = 0;
+	*CSR_TIMER1_LOAD = (mem_fclk_21285 + 8 * HZ) / (16 * HZ);
+	*CSR_TIMER1_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_AUTORELOAD |
+			   TIMER_CNTL_DIV16;
+	return 0;
+}
+
+static struct clock_event_device ckevt_dc21285 = {
+	.name			= "dc21285_timer1",
+	.features		= CLOCK_EVT_FEAT_PERIODIC |
+				  CLOCK_EVT_FEAT_ONESHOT,
+	.rating			= 200,
+	.irq			= IRQ_TIMER1,
+	.set_next_event		= ckevt_dc21285_set_next_event,
+	.set_state_shutdown	= ckevt_dc21285_shutdown,
+	.set_state_periodic	= ckevt_dc21285_set_periodic,
+	.set_state_oneshot	= ckevt_dc21285_shutdown,
+	.tick_resume		= ckevt_dc21285_set_periodic,
+};
+
+static irqreturn_t timer1_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *ce = dev_id;
+
+	*CSR_TIMER1_CLR = 0;
+
+	/* Stop the timer if in one-shot mode */
+	if (clockevent_state_oneshot(ce))
+		*CSR_TIMER1_CNTL = 0;
+
+	ce->event_handler(ce);
+
+	return IRQ_HANDLED;
+}
+
+static struct irqaction footbridge_timer_irq = {
+	.name		= "dc21285_timer1",
+	.handler	= timer1_interrupt,
+	.flags		= IRQF_TIMER | IRQF_IRQPOLL,
+	.dev_id		= &ckevt_dc21285,
+};
+
+/*
+ * Set up timer interrupt.
+ */
+void __init footbridge_timer_init(void)
+{
+	struct clock_event_device *ce = &ckevt_dc21285;
+	unsigned rate = DIV_ROUND_CLOSEST(mem_fclk_21285, 16);
+
+	clocksource_register_hz(&cksrc_dc21285, rate);
+
+	setup_irq(ce->irq, &footbridge_timer_irq);
+
+	ce->cpumask = cpumask_of(smp_processor_id());
+	clockevents_config_and_register(ce, rate, 0x4, 0xffffff);
+}
+
+static u64 notrace footbridge_read_sched_clock(void)
+{
+	return ~*CSR_TIMER3_VALUE;
+}
+
+void __init footbridge_sched_clock(void)
+{
+	unsigned rate = DIV_ROUND_CLOSEST(mem_fclk_21285, 16);
+
+	*CSR_TIMER3_LOAD = 0;
+	*CSR_TIMER3_CLR = 0;
+	*CSR_TIMER3_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_DIV16;
+
+	sched_clock_register(footbridge_read_sched_clock, 24, rate);
+}
diff --git a/arch/arm/mach-footbridge/dc21285.c b/arch/arm/mach-footbridge/dc21285.c
new file mode 100644
index 000000000..2d1f82270
--- /dev/null
+++ b/arch/arm/mach-footbridge/dc21285.c
@@ -0,0 +1,366 @@
+/*
+ *  linux/arch/arm/kernel/dec21285.c: PCI functions for DC21285
+ *
+ *  Copyright (C) 1998-2001 Russell King
+ *  Copyright (C) 1998-2000 Phil Blundell
+ *
+ * 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.
+ */
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+
+#include <asm/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/hardware/dec21285.h>
+
+#define MAX_SLOTS		21
+
+#define PCICMD_ABORT		((PCI_STATUS_REC_MASTER_ABORT| \
+				  PCI_STATUS_REC_TARGET_ABORT)<<16)
+
+#define PCICMD_ERROR_BITS	((PCI_STATUS_DETECTED_PARITY | \
+				  PCI_STATUS_REC_MASTER_ABORT | \
+				  PCI_STATUS_REC_TARGET_ABORT | \
+				  PCI_STATUS_PARITY) << 16)
+
+extern int setup_arm_irq(int, struct irqaction *);
+extern void pcibios_report_status(u_int status_mask, int warn);
+
+static unsigned long
+dc21285_base_address(struct pci_bus *bus, unsigned int devfn)
+{
+	unsigned long addr = 0;
+
+	if (bus->number == 0) {
+		if (PCI_SLOT(devfn) == 0)
+			/*
+			 * For devfn 0, point at the 21285
+			 */
+			addr = ARMCSR_BASE;
+		else {
+			devfn -= 1 << 3;
+
+			if (devfn < PCI_DEVFN(MAX_SLOTS, 0))
+				addr = PCICFG0_BASE | 0xc00000 | (devfn << 8);
+		}
+	} else
+		addr = PCICFG1_BASE | (bus->number << 16) | (devfn << 8);
+
+	return addr;
+}
+
+static int
+dc21285_read_config(struct pci_bus *bus, unsigned int devfn, int where,
+		    int size, u32 *value)
+{
+	unsigned long addr = dc21285_base_address(bus, devfn);
+	u32 v = 0xffffffff;
+
+	if (addr)
+		switch (size) {
+		case 1:
+			asm volatile("ldrb	%0, [%1, %2]"
+				: "=r" (v) : "r" (addr), "r" (where) : "cc");
+			break;
+		case 2:
+			asm volatile("ldrh	%0, [%1, %2]"
+				: "=r" (v) : "r" (addr), "r" (where) : "cc");
+			break;
+		case 4:
+			asm volatile("ldr	%0, [%1, %2]"
+				: "=r" (v) : "r" (addr), "r" (where) : "cc");
+			break;
+		}
+
+	*value = v;
+
+	v = *CSR_PCICMD;
+	if (v & PCICMD_ABORT) {
+		*CSR_PCICMD = v & (0xffff|PCICMD_ABORT);
+		return -1;
+	}
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+dc21285_write_config(struct pci_bus *bus, unsigned int devfn, int where,
+		     int size, u32 value)
+{
+	unsigned long addr = dc21285_base_address(bus, devfn);
+	u32 v;
+
+	if (addr)
+		switch (size) {
+		case 1:
+			asm volatile("strb	%0, [%1, %2]"
+				: : "r" (value), "r" (addr), "r" (where)
+				: "cc");
+			break;
+		case 2:
+			asm volatile("strh	%0, [%1, %2]"
+				: : "r" (value), "r" (addr), "r" (where)
+				: "cc");
+			break;
+		case 4:
+			asm volatile("str	%0, [%1, %2]"
+				: : "r" (value), "r" (addr), "r" (where)
+				: "cc");
+			break;
+		}
+
+	v = *CSR_PCICMD;
+	if (v & PCICMD_ABORT) {
+		*CSR_PCICMD = v & (0xffff|PCICMD_ABORT);
+		return -1;
+	}
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+struct pci_ops dc21285_ops = {
+	.read	= dc21285_read_config,
+	.write	= dc21285_write_config,
+};
+
+static struct timer_list serr_timer;
+static struct timer_list perr_timer;
+
+static void dc21285_enable_error(struct timer_list *timer)
+{
+	del_timer(timer);
+
+	if (timer == &serr_timer)
+		enable_irq(IRQ_PCI_SERR);
+	else if (timer == &perr_timer)
+		enable_irq(IRQ_PCI_PERR);
+}
+
+/*
+ * Warn on PCI errors.
+ */
+static irqreturn_t dc21285_abort_irq(int irq, void *dev_id)
+{
+	unsigned int cmd;
+	unsigned int status;
+
+	cmd = *CSR_PCICMD;
+	status = cmd >> 16;
+	cmd = cmd & 0xffff;
+
+	if (status & PCI_STATUS_REC_MASTER_ABORT) {
+		printk(KERN_DEBUG "PCI: master abort, pc=0x%08lx\n",
+			instruction_pointer(get_irq_regs()));
+		cmd |= PCI_STATUS_REC_MASTER_ABORT << 16;
+	}
+
+	if (status & PCI_STATUS_REC_TARGET_ABORT) {
+		printk(KERN_DEBUG "PCI: target abort: ");
+		pcibios_report_status(PCI_STATUS_REC_MASTER_ABORT |
+				      PCI_STATUS_SIG_TARGET_ABORT |
+				      PCI_STATUS_REC_TARGET_ABORT, 1);
+		printk("\n");
+
+		cmd |= PCI_STATUS_REC_TARGET_ABORT << 16;
+	}
+
+	*CSR_PCICMD = cmd;
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t dc21285_serr_irq(int irq, void *dev_id)
+{
+	struct timer_list *timer = dev_id;
+	unsigned int cntl;
+
+	printk(KERN_DEBUG "PCI: system error received: ");
+	pcibios_report_status(PCI_STATUS_SIG_SYSTEM_ERROR, 1);
+	printk("\n");
+
+	cntl = *CSR_SA110_CNTL & 0xffffdf07;
+	*CSR_SA110_CNTL = cntl | SA110_CNTL_RXSERR;
+
+	/*
+	 * back off this interrupt
+	 */
+	disable_irq(irq);
+	timer->expires = jiffies + HZ;
+	add_timer(timer);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t dc21285_discard_irq(int irq, void *dev_id)
+{
+	printk(KERN_DEBUG "PCI: discard timer expired\n");
+	*CSR_SA110_CNTL &= 0xffffde07;
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t dc21285_dparity_irq(int irq, void *dev_id)
+{
+	unsigned int cmd;
+
+	printk(KERN_DEBUG "PCI: data parity error detected: ");
+	pcibios_report_status(PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY, 1);
+	printk("\n");
+
+	cmd = *CSR_PCICMD & 0xffff;
+	*CSR_PCICMD = cmd | 1 << 24;
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t dc21285_parity_irq(int irq, void *dev_id)
+{
+	struct timer_list *timer = dev_id;
+	unsigned int cmd;
+
+	printk(KERN_DEBUG "PCI: parity error detected: ");
+	pcibios_report_status(PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY, 1);
+	printk("\n");
+
+	cmd = *CSR_PCICMD & 0xffff;
+	*CSR_PCICMD = cmd | 1 << 31;
+
+	/*
+	 * back off this interrupt
+	 */
+	disable_irq(irq);
+	timer->expires = jiffies + HZ;
+	add_timer(timer);
+
+	return IRQ_HANDLED;
+}
+
+int __init dc21285_setup(int nr, struct pci_sys_data *sys)
+{
+	struct resource *res;
+
+	if (nr || !footbridge_cfn_mode())
+		return 0;
+
+	res = kcalloc(2, sizeof(struct resource), GFP_KERNEL);
+	if (!res) {
+		printk("out of memory for root bus resources");
+		return 0;
+	}
+
+	res[0].flags = IORESOURCE_MEM;
+	res[0].name  = "Footbridge non-prefetch";
+	res[1].flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
+	res[1].name  = "Footbridge prefetch";
+
+	allocate_resource(&iomem_resource, &res[1], 0x20000000,
+			  0xa0000000, 0xffffffff, 0x20000000, NULL, NULL);
+	allocate_resource(&iomem_resource, &res[0], 0x40000000,
+			  0x80000000, 0xffffffff, 0x40000000, NULL, NULL);
+
+	sys->mem_offset  = DC21285_PCI_MEM;
+
+	pci_add_resource_offset(&sys->resources, &res[0], sys->mem_offset);
+	pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
+
+	return 1;
+}
+
+#define dc21285_request_irq(_a, _b, _c, _d, _e) \
+	WARN_ON(request_irq(_a, _b, _c, _d, _e) < 0)
+
+void __init dc21285_preinit(void)
+{
+	unsigned int mem_size, mem_mask;
+	int cfn_mode;
+
+	pcibios_min_mem = 0x81000000;
+
+	mem_size = (unsigned int)high_memory - PAGE_OFFSET;
+	for (mem_mask = 0x00100000; mem_mask < 0x10000000; mem_mask <<= 1)
+		if (mem_mask >= mem_size)
+			break;
+
+	/*
+	 * These registers need to be set up whether we're the
+	 * central function or not.
+	 */
+	*CSR_SDRAMBASEMASK    = (mem_mask - 1) & 0x0ffc0000;
+	*CSR_SDRAMBASEOFFSET  = 0;
+	*CSR_ROMBASEMASK      = 0x80000000;
+	*CSR_CSRBASEMASK      = 0;
+	*CSR_CSRBASEOFFSET    = 0;
+	*CSR_PCIADDR_EXTN     = 0;
+
+	cfn_mode = __footbridge_cfn_mode();
+
+	printk(KERN_INFO "PCI: DC21285 footbridge, revision %02lX, in "
+		"%s mode\n", *CSR_CLASSREV & 0xff, cfn_mode ?
+		"central function" : "addin");
+
+	if (footbridge_cfn_mode()) {
+		/*
+		 * Clear any existing errors - we aren't
+		 * interested in historical data...
+		 */
+		*CSR_SA110_CNTL	= (*CSR_SA110_CNTL & 0xffffde07) |
+				  SA110_CNTL_RXSERR;
+		*CSR_PCICMD = (*CSR_PCICMD & 0xffff) | PCICMD_ERROR_BITS;
+	}
+
+	timer_setup(&serr_timer, dc21285_enable_error, 0);
+	timer_setup(&perr_timer, dc21285_enable_error, 0);
+
+	/*
+	 * We don't care if these fail.
+	 */
+	dc21285_request_irq(IRQ_PCI_SERR, dc21285_serr_irq, 0,
+			    "PCI system error", &serr_timer);
+	dc21285_request_irq(IRQ_PCI_PERR, dc21285_parity_irq, 0,
+			    "PCI parity error", &perr_timer);
+	dc21285_request_irq(IRQ_PCI_ABORT, dc21285_abort_irq, 0,
+			    "PCI abort", NULL);
+	dc21285_request_irq(IRQ_DISCARD_TIMER, dc21285_discard_irq, 0,
+			    "Discard timer", NULL);
+	dc21285_request_irq(IRQ_PCI_DPERR, dc21285_dparity_irq, 0,
+			    "PCI data parity", NULL);
+
+	if (cfn_mode) {
+		/*
+		 * Map our SDRAM at a known address in PCI space, just in case
+		 * the firmware had other ideas.  Using a nonzero base is
+		 * necessary, since some VGA cards forcefully use PCI addresses
+		 * in the range 0x000a0000 to 0x000c0000. (eg, S3 cards).
+		 */
+		*CSR_PCICSRBASE       = 0xf4000000;
+		*CSR_PCICSRIOBASE     = 0;
+		*CSR_PCISDRAMBASE     = __virt_to_bus(PAGE_OFFSET);
+		*CSR_PCIROMBASE       = 0;
+		*CSR_PCICMD = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
+			      PCI_COMMAND_INVALIDATE | PCICMD_ERROR_BITS;
+	} else if (footbridge_cfn_mode() != 0) {
+		/*
+		 * If we are not compiled to accept "add-in" mode, then
+		 * we are using a constant virt_to_bus translation which
+		 * can not hope to cater for the way the host BIOS  has
+		 * set up the machine.
+		 */
+		panic("PCI: this kernel is compiled for central "
+			"function mode only");
+	}
+}
+
+void __init dc21285_postinit(void)
+{
+	register_isa_ports(DC21285_PCI_MEM, DC21285_PCI_IO, 0);
+}
diff --git a/arch/arm/mach-footbridge/dma.c b/arch/arm/mach-footbridge/dma.c
new file mode 100644
index 000000000..86618074a
--- /dev/null
+++ b/arch/arm/mach-footbridge/dma.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/arch/arm/kernel/dma-ebsa285.c
+ *
+ *  Copyright (C) 1998 Phil Blundell
+ *
+ * DMA functions specific to EBSA-285/CATS architectures
+ *
+ *  Changelog:
+ *   09-Nov-1998 RMK	Split out ISA DMA functions to dma-isa.c
+ *   17-Mar-1999 RMK	Allow any EBSA285-like architecture to have
+ *			ISA DMA controllers.
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/scatterlist.h>
+
+#include <asm/dma.h>
+
+#include <asm/mach/dma.h>
+#include <asm/hardware/dec21285.h>
+
+#if 0
+static int fb_dma_request(unsigned int chan, dma_t *dma)
+{
+	return -EINVAL;
+}
+
+static void fb_dma_enable(unsigned int chan, dma_t *dma)
+{
+}
+
+static void fb_dma_disable(unsigned int chan, dma_t *dma)
+{
+}
+
+static struct dma_ops fb_dma_ops = {
+	.type		= "fb",
+	.request	= fb_dma_request,
+	.enable		= fb_dma_enable,
+	.disable	= fb_dma_disable,
+};
+#endif
+
+static int __init fb_dma_init(void)
+{
+#if 0
+	dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
+	dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
+#endif
+#ifdef CONFIG_ISA_DMA
+	if (footbridge_cfn_mode())
+		isa_init_dma();
+#endif
+	return 0;
+}
+core_initcall(fb_dma_init);
diff --git a/arch/arm/mach-footbridge/ebsa285-pci.c b/arch/arm/mach-footbridge/ebsa285-pci.c
new file mode 100644
index 000000000..c3f280d08
--- /dev/null
+++ b/arch/arm/mach-footbridge/ebsa285-pci.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/ebsa285-pci.c
+ *
+ * PCI bios-type initialisation for PCI machines
+ *
+ * Bits taken from various places.
+ */
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/mach-types.h>
+
+static int irqmap_ebsa285[] = { IRQ_IN3, IRQ_IN1, IRQ_IN0, IRQ_PCI };
+
+static int ebsa285_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	if (dev->vendor == PCI_VENDOR_ID_CONTAQ &&
+	    dev->device == PCI_DEVICE_ID_CONTAQ_82C693)
+		switch (PCI_FUNC(dev->devfn)) {
+		case 1:	return 14;
+		case 2:	return 15;
+		case 3:	return 12;
+		}
+
+	return irqmap_ebsa285[(slot + pin) & 3];
+}
+
+static struct hw_pci ebsa285_pci __initdata = {
+	.map_irq		= ebsa285_map_irq,
+	.nr_controllers		= 1,
+	.ops			= &dc21285_ops,
+	.setup			= dc21285_setup,
+	.preinit		= dc21285_preinit,
+	.postinit		= dc21285_postinit,
+};
+
+static int __init ebsa285_init_pci(void)
+{
+	if (machine_is_ebsa285())
+		pci_common_init(&ebsa285_pci);
+	return 0;
+}
+
+subsys_initcall(ebsa285_init_pci);
diff --git a/arch/arm/mach-footbridge/ebsa285.c b/arch/arm/mach-footbridge/ebsa285.c
new file mode 100644
index 000000000..21cf9a358
--- /dev/null
+++ b/arch/arm/mach-footbridge/ebsa285.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/ebsa285.c
+ *
+ * EBSA285 machine fixup
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+
+#include <asm/hardware/dec21285.h>
+#include <asm/mach-types.h>
+
+#include <asm/mach/arch.h>
+
+#include "common.h"
+
+/* LEDs */
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+#define XBUS_AMBER_L	BIT(0)
+#define XBUS_GREEN_L	BIT(1)
+#define XBUS_RED_L	BIT(2)
+#define XBUS_TOGGLE	BIT(7)
+
+struct ebsa285_led {
+	struct led_classdev     cdev;
+	u8                      mask;
+};
+
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static const struct {
+	const char *name;
+	const char *trigger;
+} ebsa285_leds[] = {
+	{ "ebsa285:amber", "cpu0", },
+	{ "ebsa285:green", "heartbeat", },
+	{ "ebsa285:red",},
+};
+
+static unsigned char hw_led_state;
+static void __iomem *xbus;
+
+static void ebsa285_led_set(struct led_classdev *cdev,
+		enum led_brightness b)
+{
+	struct ebsa285_led *led = container_of(cdev,
+			struct ebsa285_led, cdev);
+
+	if (b == LED_OFF)
+		hw_led_state |= led->mask;
+	else
+		hw_led_state &= ~led->mask;
+	writeb(hw_led_state, xbus);
+}
+
+static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
+{
+	struct ebsa285_led *led = container_of(cdev,
+			struct ebsa285_led, cdev);
+
+	return hw_led_state & led->mask ? LED_OFF : LED_FULL;
+}
+
+static int __init ebsa285_leds_init(void)
+{
+	int i;
+
+	if (!machine_is_ebsa285())
+		return -ENODEV;
+
+	xbus = ioremap(XBUS_CS2, SZ_4K);
+	if (!xbus)
+		return -ENOMEM;
+
+	/* 3 LEDS all off */
+	hw_led_state = XBUS_AMBER_L | XBUS_GREEN_L | XBUS_RED_L;
+	writeb(hw_led_state, xbus);
+
+	for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) {
+		struct ebsa285_led *led;
+
+		led = kzalloc(sizeof(*led), GFP_KERNEL);
+		if (!led)
+			break;
+
+		led->cdev.name = ebsa285_leds[i].name;
+		led->cdev.brightness_set = ebsa285_led_set;
+		led->cdev.brightness_get = ebsa285_led_get;
+		led->cdev.default_trigger = ebsa285_leds[i].trigger;
+		led->mask = BIT(i);
+
+		if (led_classdev_register(NULL, &led->cdev) < 0) {
+			kfree(led);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(ebsa285_leds_init);
+#endif
+
+MACHINE_START(EBSA285, "EBSA285")
+	/* Maintainer: Russell King */
+	.atag_offset	= 0x100,
+	.video_start	= 0x000a0000,
+	.video_end	= 0x000bffff,
+	.map_io		= footbridge_map_io,
+	.init_early	= footbridge_sched_clock,
+	.init_irq	= footbridge_init_irq,
+	.init_time	= footbridge_timer_init,
+	.restart	= footbridge_restart,
+MACHINE_END
+
diff --git a/arch/arm/mach-footbridge/include/mach/entry-macro.S b/arch/arm/mach-footbridge/include/mach/entry-macro.S
new file mode 100644
index 000000000..dabbd5c54
--- /dev/null
+++ b/arch/arm/mach-footbridge/include/mach/entry-macro.S
@@ -0,0 +1,107 @@
+/*
+ * arch/arm/mach-footbridge/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for footbridge-based platforms
+ *
+ * This file is licensed under  the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+#include <asm/hardware/dec21285.h>
+
+		.equ	dc21285_high, ARMCSR_BASE & 0xff000000
+		.equ	dc21285_low, ARMCSR_BASE & 0x00ffffff
+
+		.macro  get_irqnr_preamble, base, tmp
+		mov	\base, #dc21285_high
+		.if	dc21285_low
+		orr	\base, \base, #dc21285_low
+		.endif
+		.endm
+
+		.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
+		ldr	\irqstat, [\base, #0x180]	@ get interrupts
+
+		mov	\irqnr, #IRQ_SDRAMPARITY
+		tst	\irqstat, #IRQ_MASK_SDRAMPARITY
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_UART_RX
+		movne	\irqnr, #IRQ_CONRX
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_DMA1
+		movne	\irqnr, #IRQ_DMA1
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_DMA2
+		movne	\irqnr, #IRQ_DMA2
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_IN0
+		movne	\irqnr, #IRQ_IN0
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_IN1
+		movne	\irqnr, #IRQ_IN1
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_IN2
+		movne	\irqnr, #IRQ_IN2
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_IN3
+		movne	\irqnr, #IRQ_IN3
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_PCI
+		movne	\irqnr, #IRQ_PCI
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_DOORBELLHOST
+		movne	\irqnr, #IRQ_DOORBELLHOST
+		bne     1001f
+
+		tst	\irqstat, #IRQ_MASK_I2OINPOST
+		movne	\irqnr, #IRQ_I2OINPOST
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_TIMER1
+		movne	\irqnr, #IRQ_TIMER1
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_TIMER2
+		movne	\irqnr, #IRQ_TIMER2
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_TIMER3
+		movne	\irqnr, #IRQ_TIMER3
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_UART_TX
+		movne	\irqnr, #IRQ_CONTX
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_PCI_ABORT
+		movne	\irqnr, #IRQ_PCI_ABORT
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_PCI_SERR
+		movne	\irqnr, #IRQ_PCI_SERR
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_DISCARD_TIMER
+		movne	\irqnr, #IRQ_DISCARD_TIMER
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_PCI_DPERR
+		movne	\irqnr, #IRQ_PCI_DPERR
+		bne	1001f
+
+		tst	\irqstat, #IRQ_MASK_PCI_PERR
+		movne	\irqnr, #IRQ_PCI_PERR
+1001:
+		.endm
+
diff --git a/arch/arm/mach-footbridge/include/mach/hardware.h b/arch/arm/mach-footbridge/include/mach/hardware.h
new file mode 100644
index 000000000..20d5ad781
--- /dev/null
+++ b/arch/arm/mach-footbridge/include/mach/hardware.h
@@ -0,0 +1,99 @@
+/*
+ *  arch/arm/mach-footbridge/include/mach/hardware.h
+ *
+ *  Copyright (C) 1998-1999 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.
+ *
+ *  This file contains the hardware definitions of the EBSA-285.
+ */
+#ifndef __ASM_ARCH_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+/*   Virtual      Physical	Size
+ * 0xff800000	0x40000000	1MB	X-Bus
+ * 0xff000000	0x7c000000	1MB	PCI I/O space
+ * 0xfe000000	0x42000000	1MB	CSR
+ * 0xfd000000	0x78000000	1MB	Outbound write flush (not supported)
+ * 0xfc000000	0x79000000	1MB	PCI IACK/special space
+ * 0xfb000000	0x7a000000	16MB	PCI Config type 1
+ * 0xfa000000	0x7b000000	16MB	PCI Config type 0
+ * 0xf9000000	0x50000000	1MB	Cache flush
+ * 0xf0000000	0x80000000	16MB	ISA memory
+ */
+
+#ifdef CONFIG_MMU
+#define MMU_IO(a, b)	(a)
+#else
+#define MMU_IO(a, b)	(b)
+#endif
+
+#define XBUS_SIZE		0x00100000
+#define XBUS_BASE		MMU_IO(0xff800000, 0x40000000)
+
+#define ARMCSR_SIZE		0x00100000
+#define ARMCSR_BASE		MMU_IO(0xfe000000, 0x42000000)
+
+#define WFLUSH_SIZE		0x00100000
+#define WFLUSH_BASE		MMU_IO(0xfd000000, 0x78000000)
+
+#define PCIIACK_SIZE		0x00100000
+#define PCIIACK_BASE		MMU_IO(0xfc000000, 0x79000000)
+
+#define PCICFG1_SIZE		0x01000000
+#define PCICFG1_BASE		MMU_IO(0xfb000000, 0x7a000000)
+
+#define PCICFG0_SIZE		0x01000000
+#define PCICFG0_BASE		MMU_IO(0xfa000000, 0x7b000000)
+
+#define PCIMEM_SIZE		0x01000000
+#define PCIMEM_BASE		MMU_IO(0xf0000000, 0x80000000)
+
+#define XBUS_CS2		0x40012000
+
+#define XBUS_SWITCH		((volatile unsigned char *)(XBUS_BASE + 0x12000))
+#define XBUS_SWITCH_SWITCH	((*XBUS_SWITCH) & 15)
+#define XBUS_SWITCH_J17_13	((*XBUS_SWITCH) & (1 << 4))
+#define XBUS_SWITCH_J17_11	((*XBUS_SWITCH) & (1 << 5))
+#define XBUS_SWITCH_J17_9	((*XBUS_SWITCH) & (1 << 6))
+
+#define UNCACHEABLE_ADDR	(ARMCSR_BASE + 0x108)	/* CSR_ROMBASEMASK */
+
+
+/* PIC irq control */
+#define PIC_LO			0x20
+#define PIC_MASK_LO		0x21
+#define PIC_HI			0xA0
+#define PIC_MASK_HI		0xA1
+
+/* GPIO pins */
+#define GPIO_CCLK		0x800
+#define GPIO_DSCLK		0x400
+#define GPIO_E2CLK		0x200
+#define GPIO_IOLOAD		0x100
+#define GPIO_RED_LED		0x080
+#define GPIO_WDTIMER		0x040
+#define GPIO_DATA		0x020
+#define GPIO_IOCLK		0x010
+#define GPIO_DONE		0x008
+#define GPIO_FAN		0x004
+#define GPIO_GREEN_LED		0x002
+#define GPIO_RESET		0x001
+
+/* CPLD pins */
+#define CPLD_DS_ENABLE		8
+#define CPLD_7111_DISABLE	4
+#define CPLD_UNMUTE		2
+#define CPLD_FLASH_WR_ENABLE	1
+
+#ifndef __ASSEMBLY__
+extern raw_spinlock_t nw_gpio_lock;
+extern void nw_gpio_modify_op(unsigned int mask, unsigned int set);
+extern void nw_gpio_modify_io(unsigned int mask, unsigned int in);
+extern unsigned int nw_gpio_read(void);
+extern void nw_cpld_modify(unsigned int mask, unsigned int set);
+#endif
+
+#endif
diff --git a/arch/arm/mach-footbridge/include/mach/io.h b/arch/arm/mach-footbridge/include/mach/io.h
new file mode 100644
index 000000000..aba46388c
--- /dev/null
+++ b/arch/arm/mach-footbridge/include/mach/io.h
@@ -0,0 +1,23 @@
+/*
+ *  arch/arm/mach-footbridge/include/mach/io.h
+ *
+ *  Copyright (C) 1997-1999 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.
+ *
+ *  Modifications:
+ *   06-12-1997	RMK	Created.
+ *   07-04-1999	RMK	Major cleanup
+ */
+#ifndef __ASM_ARM_ARCH_IO_H
+#define __ASM_ARM_ARCH_IO_H
+
+/*
+ * Translation of various i/o addresses to host addresses for !CONFIG_MMU
+ */
+#define PCIO_BASE       0x7c000000
+#define __io(a)			((void __iomem *)(PCIO_BASE + (a)))
+
+#endif
diff --git a/arch/arm/mach-footbridge/include/mach/irqs.h b/arch/arm/mach-footbridge/include/mach/irqs.h
new file mode 100644
index 000000000..a5f41846a
--- /dev/null
+++ b/arch/arm/mach-footbridge/include/mach/irqs.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * arch/arm/mach-footbridge/include/mach/irqs.h
+ *
+ * Copyright (C) 1998 Russell King
+ * Copyright (C) 1998 Phil Blundell
+ *
+ * Changelog:
+ *  20-Jan-1998	RMK	Started merge of EBSA286, CATS and NetWinder
+ *  01-Feb-1999	PJB	ISA IRQs start at 0 not 16
+ */
+#include <asm/mach-types.h>
+
+#define NR_IRQS			36
+#define NR_DC21285_IRQS		16
+
+#define _ISA_IRQ(x)		(0 + (x))
+#define _ISA_INR(x)		((x) - 0)
+#define _DC21285_IRQ(x)		(16 + (x))
+#define _DC21285_INR(x)		((x) - 16)
+
+/*
+ * This is a list of all interrupts that the 21285
+ * can generate and we handle.
+ */
+#define IRQ_CONRX		_DC21285_IRQ(0)
+#define IRQ_CONTX		_DC21285_IRQ(1)
+#define IRQ_TIMER1		_DC21285_IRQ(2)
+#define IRQ_TIMER2		_DC21285_IRQ(3)
+#define IRQ_TIMER3		_DC21285_IRQ(4)
+#define IRQ_IN0			_DC21285_IRQ(5)
+#define IRQ_IN1			_DC21285_IRQ(6)
+#define IRQ_IN2			_DC21285_IRQ(7)
+#define IRQ_IN3			_DC21285_IRQ(8)
+#define IRQ_DOORBELLHOST	_DC21285_IRQ(9)
+#define IRQ_DMA1		_DC21285_IRQ(10)
+#define IRQ_DMA2		_DC21285_IRQ(11)
+#define IRQ_PCI			_DC21285_IRQ(12)
+#define IRQ_SDRAMPARITY		_DC21285_IRQ(13)
+#define IRQ_I2OINPOST		_DC21285_IRQ(14)
+#define IRQ_PCI_ABORT		_DC21285_IRQ(15)
+#define IRQ_PCI_SERR		_DC21285_IRQ(16)
+#define IRQ_DISCARD_TIMER	_DC21285_IRQ(17)
+#define IRQ_PCI_DPERR		_DC21285_IRQ(18)
+#define IRQ_PCI_PERR		_DC21285_IRQ(19)
+
+#define IRQ_ISA_TIMER		_ISA_IRQ(0)
+#define IRQ_ISA_KEYBOARD	_ISA_IRQ(1)
+#define IRQ_ISA_CASCADE		_ISA_IRQ(2)
+#define IRQ_ISA_UART2		_ISA_IRQ(3)
+#define IRQ_ISA_UART		_ISA_IRQ(4)
+#define IRQ_ISA_FLOPPY		_ISA_IRQ(6)
+#define IRQ_ISA_PRINTER		_ISA_IRQ(7)
+#define IRQ_ISA_RTC_ALARM	_ISA_IRQ(8)
+#define IRQ_ISA_2		_ISA_IRQ(9)
+#define IRQ_ISA_PS2MOUSE	_ISA_IRQ(12)
+#define IRQ_ISA_HARDDISK1	_ISA_IRQ(14)
+#define IRQ_ISA_HARDDISK2	_ISA_IRQ(15)
+
+#define IRQ_MASK_UART_RX	(1 << 2)
+#define IRQ_MASK_UART_TX	(1 << 3)
+#define IRQ_MASK_TIMER1		(1 << 4)
+#define IRQ_MASK_TIMER2		(1 << 5)
+#define IRQ_MASK_TIMER3		(1 << 6)
+#define IRQ_MASK_IN0		(1 << 8)
+#define IRQ_MASK_IN1		(1 << 9)
+#define IRQ_MASK_IN2		(1 << 10)
+#define IRQ_MASK_IN3		(1 << 11)
+#define IRQ_MASK_DOORBELLHOST	(1 << 15)
+#define IRQ_MASK_DMA1		(1 << 16)
+#define IRQ_MASK_DMA2		(1 << 17)
+#define IRQ_MASK_PCI		(1 << 18)
+#define IRQ_MASK_SDRAMPARITY	(1 << 24)
+#define IRQ_MASK_I2OINPOST	(1 << 25)
+#define IRQ_MASK_PCI_ABORT	((1 << 29) | (1 << 30))
+#define IRQ_MASK_PCI_SERR	(1 << 23)
+#define IRQ_MASK_DISCARD_TIMER	(1 << 27)
+#define IRQ_MASK_PCI_DPERR	(1 << 28)
+#define IRQ_MASK_PCI_PERR	(1 << 31)
+
+/*
+ * Netwinder interrupt allocations
+ */
+#define IRQ_NETWINDER_ETHER10	IRQ_IN0
+#define IRQ_NETWINDER_ETHER100	IRQ_IN1
+#define IRQ_NETWINDER_VIDCOMP	IRQ_IN2
+#define IRQ_NETWINDER_PS2MOUSE	_ISA_IRQ(5)
+#define IRQ_NETWINDER_IR	_ISA_IRQ(6)
+#define IRQ_NETWINDER_BUTTON	_ISA_IRQ(10)
+#define IRQ_NETWINDER_VGA	_ISA_IRQ(11)
+#define IRQ_NETWINDER_SOUND	_ISA_IRQ(12)
+
+#define I8042_KBD_IRQ	IRQ_ISA_KEYBOARD
+#define I8042_AUX_IRQ	(machine_is_netwinder() ? IRQ_NETWINDER_PS2MOUSE : IRQ_ISA_PS2MOUSE)
+#define IRQ_FLOPPYDISK	IRQ_ISA_FLOPPY
+
+#define irq_canonicalize(_i)	(((_i) == IRQ_ISA_CASCADE) ? IRQ_ISA_2 : _i)
diff --git a/arch/arm/mach-footbridge/include/mach/isa-dma.h b/arch/arm/mach-footbridge/include/mach/isa-dma.h
new file mode 100644
index 000000000..8a1b99107
--- /dev/null
+++ b/arch/arm/mach-footbridge/include/mach/isa-dma.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  arch/arm/mach-footbridge/include/mach/isa-dma.h
+ *
+ *  Architecture DMA routines
+ *
+ *  Copyright (C) 1998,1999 Russell King
+ *  Copyright (C) 1998,1999 Philip Blundell
+ */
+#ifndef __ASM_ARCH_DMA_H
+#define __ASM_ARCH_DMA_H
+
+/*
+ * The 21285 has two internal DMA channels; we call these 8 and 9.
+ * On CATS hardware we have an additional eight ISA dma channels
+ * numbered 0..7.
+ */
+#define _ISA_DMA(x)		(0+(x))
+#define _DC21285_DMA(x)		(8+(x))
+
+#define MAX_DMA_CHANNELS	10
+
+#define DMA_FLOPPY		_ISA_DMA(2)
+#define DMA_ISA_CASCADE		_ISA_DMA(4)
+
+#endif /* _ASM_ARCH_DMA_H */
diff --git a/arch/arm/mach-footbridge/include/mach/memory.h b/arch/arm/mach-footbridge/include/mach/memory.h
new file mode 100644
index 000000000..6f2ecccdf
--- /dev/null
+++ b/arch/arm/mach-footbridge/include/mach/memory.h
@@ -0,0 +1,64 @@
+/*
+ *  arch/arm/mach-footbridge/include/mach/memory.h
+ *
+ *  Copyright (C) 1996-1999 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.
+ *
+ *  Changelog:
+ *   20-Oct-1996 RMK	Created
+ *   31-Dec-1997 RMK	Fixed definitions to reduce warnings.
+ *   17-May-1998 DAG	Added __virt_to_bus and __bus_to_virt functions.
+ *   21-Nov-1998 RMK	Changed __virt_to_bus and __bus_to_virt to macros.
+ *   21-Mar-1999 RMK	Added PAGE_OFFSET for co285 architecture.
+ *			Renamed to memory.h
+ *			Moved PAGE_OFFSET and TASK_SIZE here
+ */
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+
+#if defined(CONFIG_FOOTBRIDGE_ADDIN)
+/*
+ * If we may be using add-in footbridge mode, then we must
+ * use the out-of-line translation that makes use of the
+ * PCI BAR
+ */
+#ifndef __ASSEMBLY__
+extern unsigned long __virt_to_bus(unsigned long);
+extern unsigned long __bus_to_virt(unsigned long);
+extern unsigned long __pfn_to_bus(unsigned long);
+extern unsigned long __bus_to_pfn(unsigned long);
+#endif
+#define __virt_to_bus	__virt_to_bus
+#define __bus_to_virt	__bus_to_virt
+
+#elif defined(CONFIG_FOOTBRIDGE_HOST)
+
+/*
+ * The footbridge is programmed to expose the system RAM at 0xe0000000.
+ * The requirement is that the RAM isn't placed at bus address 0, which
+ * would clash with VGA cards.
+ */
+#define BUS_OFFSET		0xe0000000
+#define __virt_to_bus(x)	((x) + (BUS_OFFSET - PAGE_OFFSET))
+#define __bus_to_virt(x)	((x) - (BUS_OFFSET - PAGE_OFFSET))
+#define __pfn_to_bus(x)		(__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
+#define __bus_to_pfn(x)		__phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
+
+#else
+
+#error "Undefined footbridge mode"
+
+#endif
+
+/*
+ * Cache flushing area.
+ */
+#define FLUSH_BASE		0xf9000000
+
+#define FLUSH_BASE_PHYS		0x50000000
+
+#endif
diff --git a/arch/arm/mach-footbridge/include/mach/uncompress.h b/arch/arm/mach-footbridge/include/mach/uncompress.h
new file mode 100644
index 000000000..a69398c05
--- /dev/null
+++ b/arch/arm/mach-footbridge/include/mach/uncompress.h
@@ -0,0 +1,37 @@
+/*
+ *  arch/arm/mach-footbridge/include/mach/uncompress.h
+ *
+ *  Copyright (C) 1996-1999 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.
+ */
+#include <asm/mach-types.h>
+
+/*
+ * Note! This could cause problems on the NetWinder
+ */
+#define DC21285_BASE ((volatile unsigned int *)0x42000160)
+#define SER0_BASE    ((volatile unsigned char *)0x7c0003f8)
+
+static inline void putc(char c)
+{
+	if (machine_is_netwinder()) {
+		while ((SER0_BASE[5] & 0x60) != 0x60)
+			barrier();
+		SER0_BASE[0] = c;
+	} else {
+		while (DC21285_BASE[6] & 8);
+		DC21285_BASE[0] = c;
+	}
+}
+
+static inline void flush(void)
+{
+}
+
+/*
+ * nothing to do
+ */
+#define arch_decomp_setup()
diff --git a/arch/arm/mach-footbridge/isa-irq.c b/arch/arm/mach-footbridge/isa-irq.c
new file mode 100644
index 000000000..c01fca11b
--- /dev/null
+++ b/arch/arm/mach-footbridge/isa-irq.c
@@ -0,0 +1,182 @@
+/*
+ *  linux/arch/arm/mach-footbridge/irq.c
+ *
+ *  Copyright (C) 1996-2000 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.
+ *
+ *  Changelog:
+ *   22-Aug-1998 RMK	Restructured IRQ routines
+ *   03-Sep-1998 PJB	Merged CATS support
+ *   20-Jan-1998 RMK	Started merge of EBSA286, CATS and NetWinder
+ *   26-Jan-1999 PJB	Don't use IACK on CATS
+ *   16-Mar-1999 RMK	Added autodetect of ISA PICs
+ */
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+
+#include <asm/mach/irq.h>
+
+#include <mach/hardware.h>
+#include <asm/hardware/dec21285.h>
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+#include "common.h"
+
+static void isa_mask_pic_lo_irq(struct irq_data *d)
+{
+	unsigned int mask = 1 << (d->irq & 7);
+
+	outb(inb(PIC_MASK_LO) | mask, PIC_MASK_LO);
+}
+
+static void isa_ack_pic_lo_irq(struct irq_data *d)
+{
+	unsigned int mask = 1 << (d->irq & 7);
+
+	outb(inb(PIC_MASK_LO) | mask, PIC_MASK_LO);
+	outb(0x20, PIC_LO);
+}
+
+static void isa_unmask_pic_lo_irq(struct irq_data *d)
+{
+	unsigned int mask = 1 << (d->irq & 7);
+
+	outb(inb(PIC_MASK_LO) & ~mask, PIC_MASK_LO);
+}
+
+static struct irq_chip isa_lo_chip = {
+	.irq_ack	= isa_ack_pic_lo_irq,
+	.irq_mask	= isa_mask_pic_lo_irq,
+	.irq_unmask	= isa_unmask_pic_lo_irq,
+};
+
+static void isa_mask_pic_hi_irq(struct irq_data *d)
+{
+	unsigned int mask = 1 << (d->irq & 7);
+
+	outb(inb(PIC_MASK_HI) | mask, PIC_MASK_HI);
+}
+
+static void isa_ack_pic_hi_irq(struct irq_data *d)
+{
+	unsigned int mask = 1 << (d->irq & 7);
+
+	outb(inb(PIC_MASK_HI) | mask, PIC_MASK_HI);
+	outb(0x62, PIC_LO);
+	outb(0x20, PIC_HI);
+}
+
+static void isa_unmask_pic_hi_irq(struct irq_data *d)
+{
+	unsigned int mask = 1 << (d->irq & 7);
+
+	outb(inb(PIC_MASK_HI) & ~mask, PIC_MASK_HI);
+}
+
+static struct irq_chip isa_hi_chip = {
+	.irq_ack	= isa_ack_pic_hi_irq,
+	.irq_mask	= isa_mask_pic_hi_irq,
+	.irq_unmask	= isa_unmask_pic_hi_irq,
+};
+
+static void isa_irq_handler(struct irq_desc *desc)
+{
+	unsigned int isa_irq = *(unsigned char *)PCIIACK_BASE;
+
+	if (isa_irq < _ISA_IRQ(0) || isa_irq >= _ISA_IRQ(16)) {
+		do_bad_IRQ(desc);
+		return;
+	}
+
+	generic_handle_irq(isa_irq);
+}
+
+static struct irqaction irq_cascade = {
+	.handler = no_action,
+	.name = "cascade",
+};
+
+static struct resource pic1_resource = {
+	.name	= "pic1",
+	.start	= 0x20,
+	.end	= 0x3f,
+};
+
+static struct resource pic2_resource = {
+	.name	= "pic2",
+	.start	= 0xa0,
+	.end	= 0xbf,
+};
+
+void __init isa_init_irq(unsigned int host_irq)
+{
+	unsigned int irq;
+
+	/*
+	 * Setup, and then probe for an ISA PIC
+	 * If the PIC is not there, then we
+	 * ignore the PIC.
+	 */
+	outb(0x11, PIC_LO);
+	outb(_ISA_IRQ(0), PIC_MASK_LO);	/* IRQ number		*/
+	outb(0x04, PIC_MASK_LO);	/* Slave on Ch2		*/
+	outb(0x01, PIC_MASK_LO);	/* x86			*/
+	outb(0xf5, PIC_MASK_LO);	/* pattern: 11110101	*/
+
+	outb(0x11, PIC_HI);
+	outb(_ISA_IRQ(8), PIC_MASK_HI);	/* IRQ number		*/
+	outb(0x02, PIC_MASK_HI);	/* Slave on Ch1		*/
+	outb(0x01, PIC_MASK_HI);	/* x86			*/
+	outb(0xfa, PIC_MASK_HI);	/* pattern: 11111010	*/
+
+	outb(0x0b, PIC_LO);
+	outb(0x0b, PIC_HI);
+
+	if (inb(PIC_MASK_LO) == 0xf5 && inb(PIC_MASK_HI) == 0xfa) {
+		outb(0xff, PIC_MASK_LO);/* mask all IRQs	*/
+		outb(0xff, PIC_MASK_HI);/* mask all IRQs	*/
+	} else {
+		printk(KERN_INFO "IRQ: ISA PIC not found\n");
+		host_irq = (unsigned int)-1;
+	}
+
+	if (host_irq != (unsigned int)-1) {
+		for (irq = _ISA_IRQ(0); irq < _ISA_IRQ(8); irq++) {
+			irq_set_chip_and_handler(irq, &isa_lo_chip,
+						 handle_level_irq);
+			irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
+		}
+
+		for (irq = _ISA_IRQ(8); irq < _ISA_IRQ(16); irq++) {
+			irq_set_chip_and_handler(irq, &isa_hi_chip,
+						 handle_level_irq);
+			irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
+		}
+
+		request_resource(&ioport_resource, &pic1_resource);
+		request_resource(&ioport_resource, &pic2_resource);
+		setup_irq(IRQ_ISA_CASCADE, &irq_cascade);
+
+		irq_set_chained_handler(host_irq, isa_irq_handler);
+
+		/*
+		 * On the NetWinder, don't automatically
+		 * enable ISA IRQ11 when it is requested.
+		 * There appears to be a missing pull-up
+		 * resistor on this line.
+		 */
+		if (machine_is_netwinder())
+			irq_modify_status(_ISA_IRQ(11),
+				IRQ_NOREQUEST | IRQ_NOPROBE, IRQ_NOAUTOEN);
+	}
+}
+
+
diff --git a/arch/arm/mach-footbridge/isa-rtc.c b/arch/arm/mach-footbridge/isa-rtc.c
new file mode 100644
index 000000000..b8f741a3a
--- /dev/null
+++ b/arch/arm/mach-footbridge/isa-rtc.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  arch/arm/mach-footbridge/isa-rtc.c
+ *
+ *  Copyright (C) 1998 Russell King.
+ *  Copyright (C) 1998 Phil Blundell
+ *
+ * CATS has a real-time clock, though the evaluation board doesn't.
+ *
+ * Changelog:
+ *  21-Mar-1998	RMK	Created
+ *  27-Aug-1998	PJB	CATS support
+ *  28-Dec-1998	APH	Made leds optional
+ *  20-Jan-1999	RMK	Started merge of EBSA285, CATS and NetWinder
+ *  16-Mar-1999	RMK	More support for EBSA285-like machines with RTCs in
+ */
+
+#define RTC_PORT(x)		(0x70+(x))
+#define RTC_ALWAYS_BCD		0
+
+#include <linux/init.h>
+#include <linux/mc146818rtc.h>
+#include <linux/bcd.h>
+#include <linux/io.h>
+
+#include "common.h"
+
+void __init isa_rtc_init(void)
+{
+	int reg_d, reg_b;
+
+	/*
+	 * Probe for the RTC.
+	 */
+	reg_d = CMOS_READ(RTC_REG_D);
+
+	/*
+	 * make sure the divider is set
+	 */
+	CMOS_WRITE(RTC_REF_CLCK_32KHZ, RTC_REG_A);
+
+	/*
+	 * Set control reg B
+	 *   (24 hour mode, update enabled)
+	 */
+	reg_b = CMOS_READ(RTC_REG_B) & 0x7f;
+	reg_b |= 2;
+	CMOS_WRITE(reg_b, RTC_REG_B);
+
+	if ((CMOS_READ(RTC_REG_A) & 0x7f) == RTC_REF_CLCK_32KHZ &&
+	    CMOS_READ(RTC_REG_B) == reg_b) {
+		/*
+		 * We have a RTC.  Check the battery
+		 */
+		if ((reg_d & 0x80) == 0)
+			printk(KERN_WARNING "RTC: *** warning: CMOS battery bad\n");
+	}
+}
diff --git a/arch/arm/mach-footbridge/isa-timer.c b/arch/arm/mach-footbridge/isa-timer.c
new file mode 100644
index 000000000..82f45591f
--- /dev/null
+++ b/arch/arm/mach-footbridge/isa-timer.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/arch/arm/mach-footbridge/isa-timer.c
+ *
+ *  Copyright (C) 1998 Russell King.
+ *  Copyright (C) 1998 Phil Blundell
+ */
+#include <linux/clockchips.h>
+#include <linux/i8253.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/spinlock.h>
+#include <linux/timex.h>
+
+#include <asm/irq.h>
+#include <asm/mach/time.h>
+
+#include "common.h"
+
+static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *ce = dev_id;
+	ce->event_handler(ce);
+	return IRQ_HANDLED;
+}
+
+static struct irqaction pit_timer_irq = {
+	.name		= "pit",
+	.handler	= pit_timer_interrupt,
+	.flags		= IRQF_TIMER | IRQF_IRQPOLL,
+	.dev_id		= &i8253_clockevent,
+};
+
+void __init isa_timer_init(void)
+{
+	clocksource_i8253_init();
+
+	setup_irq(i8253_clockevent.irq, &pit_timer_irq);
+	clockevent_i8253_init(false);
+}
diff --git a/arch/arm/mach-footbridge/isa.c b/arch/arm/mach-footbridge/isa.c
new file mode 100644
index 000000000..4d9276c27
--- /dev/null
+++ b/arch/arm/mach-footbridge/isa.c
@@ -0,0 +1,101 @@
+/*
+ *  linux/arch/arm/mach-footbridge/isa.c
+ *
+ *  Copyright (C) 2004 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.
+ */
+#include <linux/init.h>
+#include <linux/serial_8250.h>
+
+#include <asm/irq.h>
+#include <asm/hardware/dec21285.h>
+
+#include "common.h"
+
+static struct resource rtc_resources[] = {
+	[0] = {
+		.start	= 0x70,
+		.end	= 0x73,
+		.flags	= IORESOURCE_IO,
+	},
+	[1] = {
+		.start	= IRQ_ISA_RTC_ALARM,
+		.end	= IRQ_ISA_RTC_ALARM,
+		.flags	= IORESOURCE_IRQ,
+	}
+};
+
+static struct platform_device rtc_device = {
+	.name		= "rtc_cmos",
+	.id		= -1,
+	.resource	= rtc_resources,
+	.num_resources	= ARRAY_SIZE(rtc_resources),
+};
+
+static struct resource serial_resources[] = {
+	[0] = {
+		.start	= 0x3f8,
+		.end	= 0x3ff,
+		.flags	= IORESOURCE_IO,
+	},
+	[1] = {
+		.start	= 0x2f8,
+		.end	= 0x2ff,
+		.flags	= IORESOURCE_IO,
+	},
+};
+
+static struct plat_serial8250_port serial_platform_data[] = {
+	{
+		.iobase		= 0x3f8,
+		.irq		= IRQ_ISA_UART,
+		.uartclk	= 1843200,
+		.regshift	= 0,
+		.iotype		= UPIO_PORT,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+	},
+	{
+		.iobase		= 0x2f8,
+		.irq		= IRQ_ISA_UART2,
+		.uartclk	= 1843200,
+		.regshift	= 0,
+		.iotype		= UPIO_PORT,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+	},
+	{ },
+};
+
+static struct platform_device serial_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev			= {
+		.platform_data	= serial_platform_data,
+	},
+	.resource		= serial_resources,
+	.num_resources		= ARRAY_SIZE(serial_resources),
+};
+
+static int __init footbridge_isa_init(void)
+{
+	int err = 0;
+
+	if (!footbridge_cfn_mode())
+		return 0;
+
+	/* Personal server doesn't have RTC */
+	if (!machine_is_personal_server()) {
+		isa_rtc_init();
+		err = platform_device_register(&rtc_device);
+		if (err)
+			printk(KERN_ERR "Unable to register RTC device: %d\n", err);
+	}
+	err = platform_device_register(&serial_device);
+	if (err)
+		printk(KERN_ERR "Unable to register serial device: %d\n", err);
+	return 0;
+}
+
+arch_initcall(footbridge_isa_init);
diff --git a/arch/arm/mach-footbridge/netwinder-hw.c b/arch/arm/mach-footbridge/netwinder-hw.c
new file mode 100644
index 000000000..5f7265b1b
--- /dev/null
+++ b/arch/arm/mach-footbridge/netwinder-hw.c
@@ -0,0 +1,772 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/netwinder-hw.c
+ *
+ * Netwinder machine fixup
+ *
+ * Copyright (C) 1998, 1999 Russell King, Phil Blundell
+ */
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+
+#include <asm/hardware/dec21285.h>
+#include <asm/mach-types.h>
+#include <asm/setup.h>
+#include <asm/system_misc.h>
+
+#include <asm/mach/arch.h>
+
+#include "common.h"
+
+#define IRDA_IO_BASE		0x180
+#define GP1_IO_BASE		0x338
+#define GP2_IO_BASE		0x33a
+
+/*
+ * Winbond WB83977F accessibility stuff
+ */
+static inline void wb977_open(void)
+{
+	outb(0x87, 0x370);
+	outb(0x87, 0x370);
+}
+
+static inline void wb977_close(void)
+{
+	outb(0xaa, 0x370);
+}
+
+static inline void wb977_wb(int reg, int val)
+{
+	outb(reg, 0x370);
+	outb(val, 0x371);
+}
+
+static inline void wb977_ww(int reg, int val)
+{
+	outb(reg, 0x370);
+	outb(val >> 8, 0x371);
+	outb(reg + 1, 0x370);
+	outb(val & 255, 0x371);
+}
+
+#define wb977_device_select(dev)	wb977_wb(0x07, dev)
+#define wb977_device_disable()		wb977_wb(0x30, 0x00)
+#define wb977_device_enable()		wb977_wb(0x30, 0x01)
+
+/*
+ * This is a lock for accessing ports GP1_IO_BASE and GP2_IO_BASE
+ */
+DEFINE_RAW_SPINLOCK(nw_gpio_lock);
+EXPORT_SYMBOL(nw_gpio_lock);
+
+static unsigned int current_gpio_op;
+static unsigned int current_gpio_io;
+static unsigned int current_cpld;
+
+void nw_gpio_modify_op(unsigned int mask, unsigned int set)
+{
+	unsigned int new_gpio, changed;
+
+	new_gpio = (current_gpio_op & ~mask) | set;
+	changed = new_gpio ^ current_gpio_op;
+	current_gpio_op = new_gpio;
+
+	if (changed & 0xff)
+		outb(new_gpio, GP1_IO_BASE);
+	if (changed & 0xff00)
+		outb(new_gpio >> 8, GP2_IO_BASE);
+}
+EXPORT_SYMBOL(nw_gpio_modify_op);
+
+static inline void __gpio_modify_io(int mask, int in)
+{
+	unsigned int new_gpio, changed;
+	int port;
+
+	new_gpio = (current_gpio_io & ~mask) | in;
+	changed = new_gpio ^ current_gpio_io;
+	current_gpio_io = new_gpio;
+
+	changed >>= 1;
+	new_gpio >>= 1;
+
+	wb977_device_select(7);
+
+	for (port = 0xe1; changed && port < 0xe8; changed >>= 1) {
+		wb977_wb(port, new_gpio & 1);
+
+		port += 1;
+		new_gpio >>= 1;
+	}
+
+	wb977_device_select(8);
+
+	for (port = 0xe8; changed && port < 0xec; changed >>= 1) {
+		wb977_wb(port, new_gpio & 1);
+
+		port += 1;
+		new_gpio >>= 1;
+	}
+}
+
+void nw_gpio_modify_io(unsigned int mask, unsigned int in)
+{
+	/* Open up the SuperIO chip */
+	wb977_open();
+
+	__gpio_modify_io(mask, in);
+
+	/* Close up the EFER gate */
+	wb977_close();
+}
+EXPORT_SYMBOL(nw_gpio_modify_io);
+
+unsigned int nw_gpio_read(void)
+{
+	return inb(GP1_IO_BASE) | inb(GP2_IO_BASE) << 8;
+}
+EXPORT_SYMBOL(nw_gpio_read);
+
+/*
+ * Initialise the Winbond W83977F global registers
+ */
+static inline void wb977_init_global(void)
+{
+	/*
+	 * Enable R/W config registers
+	 */
+	wb977_wb(0x26, 0x40);
+
+	/*
+	 * Power down FDC (not used)
+	 */
+	wb977_wb(0x22, 0xfe);
+
+	/*
+	 * GP12, GP11, CIRRX, IRRXH, GP10
+	 */
+	wb977_wb(0x2a, 0xc1);
+
+	/*
+	 * GP23, GP22, GP21, GP20, GP13
+	 */
+	wb977_wb(0x2b, 0x6b);
+
+	/*
+	 * GP17, GP16, GP15, GP14
+	 */
+	wb977_wb(0x2c, 0x55);
+}
+
+/*
+ * Initialise the Winbond W83977F printer port
+ */
+static inline void wb977_init_printer(void)
+{
+	wb977_device_select(1);
+
+	/*
+	 * mode 1 == EPP
+	 */
+	wb977_wb(0xf0, 0x01);
+}
+
+/*
+ * Initialise the Winbond W83977F keyboard controller
+ */
+static inline void wb977_init_keyboard(void)
+{
+	wb977_device_select(5);
+
+	/*
+	 * Keyboard controller address
+	 */
+	wb977_ww(0x60, 0x0060);
+	wb977_ww(0x62, 0x0064);
+
+	/*
+	 * Keyboard IRQ 1, active high, edge trigger
+	 */
+	wb977_wb(0x70, 1);
+	wb977_wb(0x71, 0x02);
+
+	/*
+	 * Mouse IRQ 5, active high, edge trigger
+	 */
+	wb977_wb(0x72, 5);
+	wb977_wb(0x73, 0x02);
+
+	/*
+	 * KBC 8MHz
+	 */
+	wb977_wb(0xf0, 0x40);
+
+	/*
+	 * Enable device
+	 */
+	wb977_device_enable();
+}
+
+/*
+ * Initialise the Winbond W83977F Infra-Red device
+ */
+static inline void wb977_init_irda(void)
+{
+	wb977_device_select(6);
+
+	/*
+	 * IR base address
+	 */
+	wb977_ww(0x60, IRDA_IO_BASE);
+
+	/*
+	 * IRDA IRQ 6, active high, edge trigger
+	 */
+	wb977_wb(0x70, 6);
+	wb977_wb(0x71, 0x02);
+
+	/*
+	 * RX DMA - ISA DMA 0
+	 */
+	wb977_wb(0x74, 0x00);
+
+	/*
+	 * TX DMA - Disable Tx DMA
+	 */
+	wb977_wb(0x75, 0x04);
+
+	/*
+	 * Append CRC, Enable bank selection
+	 */
+	wb977_wb(0xf0, 0x03);
+
+	/*
+	 * Enable device
+	 */
+	wb977_device_enable();
+}
+
+/*
+ * Initialise Winbond W83977F general purpose IO
+ */
+static inline void wb977_init_gpio(void)
+{
+	unsigned long flags;
+
+	/*
+	 * Set up initial I/O definitions
+	 */
+	current_gpio_io = -1;
+	__gpio_modify_io(-1, GPIO_DONE | GPIO_WDTIMER);
+
+	wb977_device_select(7);
+
+	/*
+	 * Group1 base address
+	 */
+	wb977_ww(0x60, GP1_IO_BASE);
+	wb977_ww(0x62, 0);
+	wb977_ww(0x64, 0);
+
+	/*
+	 * GP10 (Orage button) IRQ 10, active high, edge trigger
+	 */
+	wb977_wb(0x70, 10);
+	wb977_wb(0x71, 0x02);
+
+	/*
+	 * GP10: Debounce filter enabled, IRQ, input
+	 */
+	wb977_wb(0xe0, 0x19);
+
+	/*
+	 * Enable Group1
+	 */
+	wb977_device_enable();
+
+	wb977_device_select(8);
+
+	/*
+	 * Group2 base address
+	 */
+	wb977_ww(0x60, GP2_IO_BASE);
+
+	/*
+	 * Clear watchdog timer regs
+	 *  - timer disable
+	 */
+	wb977_wb(0xf2, 0x00);
+
+	/*
+	 *  - disable LED, no mouse nor keyboard IRQ
+	 */
+	wb977_wb(0xf3, 0x00);
+
+	/*
+	 *  - timer counting, disable power LED, disable timeouot
+	 */
+	wb977_wb(0xf4, 0x00);
+
+	/*
+	 * Enable group2
+	 */
+	wb977_device_enable();
+
+	/*
+	 * Set Group1/Group2 outputs
+	 */
+	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
+	nw_gpio_modify_op(-1, GPIO_RED_LED | GPIO_FAN);
+	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
+}
+
+/*
+ * Initialise the Winbond W83977F chip.
+ */
+static void __init wb977_init(void)
+{
+	request_region(0x370, 2, "W83977AF configuration");
+
+	/*
+	 * Open up the SuperIO chip
+	 */
+	wb977_open();
+
+	/*
+	 * Initialise the global registers
+	 */
+	wb977_init_global();
+
+	/*
+	 * Initialise the various devices in
+	 * the multi-IO chip.
+	 */
+	wb977_init_printer();
+	wb977_init_keyboard();
+	wb977_init_irda();
+	wb977_init_gpio();
+
+	/*
+	 * Close up the EFER gate
+	 */
+	wb977_close();
+}
+
+void nw_cpld_modify(unsigned int mask, unsigned int set)
+{
+	int msk;
+
+	current_cpld = (current_cpld & ~mask) | set;
+
+	nw_gpio_modify_io(GPIO_DATA | GPIO_IOCLK | GPIO_IOLOAD, 0);
+	nw_gpio_modify_op(GPIO_IOLOAD, 0);
+
+	for (msk = 8; msk; msk >>= 1) {
+		int bit = current_cpld & msk;
+
+		nw_gpio_modify_op(GPIO_DATA | GPIO_IOCLK, bit ? GPIO_DATA : 0);
+		nw_gpio_modify_op(GPIO_IOCLK, GPIO_IOCLK);
+	}
+
+	nw_gpio_modify_op(GPIO_IOCLK|GPIO_DATA, 0);
+	nw_gpio_modify_op(GPIO_IOLOAD|GPIO_DSCLK, GPIO_IOLOAD|GPIO_DSCLK);
+	nw_gpio_modify_op(GPIO_IOLOAD, 0);
+}
+EXPORT_SYMBOL(nw_cpld_modify);
+
+static void __init cpld_init(void)
+{
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
+	nw_cpld_modify(-1, CPLD_UNMUTE | CPLD_7111_DISABLE);
+	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
+}
+
+static unsigned char rwa_unlock[] __initdata =
+{ 0x00, 0x00, 0x6a, 0xb5, 0xda, 0xed, 0xf6, 0xfb, 0x7d, 0xbe, 0xdf, 0x6f, 0x37, 0x1b,
+  0x0d, 0x86, 0xc3, 0x61, 0xb0, 0x58, 0x2c, 0x16, 0x8b, 0x45, 0xa2, 0xd1, 0xe8, 0x74,
+  0x3a, 0x9d, 0xce, 0xe7, 0x73, 0x39 };
+
+#ifndef DEBUG
+#define dprintk(x...)
+#else
+#define dprintk(x...) printk(x)
+#endif
+
+#define WRITE_RWA(r,v) do { outb((r), 0x279); udelay(10); outb((v), 0xa79); } while (0)
+
+static inline void rwa010_unlock(void)
+{
+	int i;
+
+	WRITE_RWA(2, 2);
+	mdelay(10);
+
+	for (i = 0; i < sizeof(rwa_unlock); i++) {
+		outb(rwa_unlock[i], 0x279);
+		udelay(10);
+	}
+}
+
+static inline void rwa010_read_ident(void)
+{
+	unsigned char si[9];
+	int i, j;
+
+	WRITE_RWA(3, 0);
+	WRITE_RWA(0, 128);
+
+	outb(1, 0x279);
+
+	mdelay(1);
+
+	dprintk("Identifier: ");
+	for (i = 0; i < 9; i++) {
+		si[i] = 0;
+		for (j = 0; j < 8; j++) {
+			int bit;
+			udelay(250);
+			inb(0x203);
+			udelay(250);
+			bit = inb(0x203);
+			dprintk("%02X ", bit);
+			bit = (bit == 0xaa) ? 1 : 0;
+			si[i] |= bit << j;
+		}
+		dprintk("(%02X) ", si[i]);
+	}
+	dprintk("\n");
+}
+
+static inline void rwa010_global_init(void)
+{
+	WRITE_RWA(6, 2);	// Assign a card no = 2
+
+	dprintk("Card no = %d\n", inb(0x203));
+
+	/* disable the modem section of the chip */
+	WRITE_RWA(7, 3);
+	WRITE_RWA(0x30, 0);
+
+	/* disable the cdrom section of the chip */
+	WRITE_RWA(7, 4);
+	WRITE_RWA(0x30, 0);
+
+	/* disable the MPU-401 section of the chip */
+	WRITE_RWA(7, 2);
+	WRITE_RWA(0x30, 0);
+}
+
+static inline void rwa010_game_port_init(void)
+{
+	int i;
+
+	WRITE_RWA(7, 5);
+
+	dprintk("Slider base: ");
+	WRITE_RWA(0x61, 1);
+	i = inb(0x203);
+
+	WRITE_RWA(0x60, 2);
+	dprintk("%02X%02X (201)\n", inb(0x203), i);
+
+	WRITE_RWA(0x30, 1);
+}
+
+static inline void rwa010_waveartist_init(int base, int irq, int dma)
+{
+	int i;
+
+	WRITE_RWA(7, 0);
+
+	dprintk("WaveArtist base: ");
+	WRITE_RWA(0x61, base & 255);
+	i = inb(0x203);
+
+	WRITE_RWA(0x60, base >> 8);
+	dprintk("%02X%02X (%X),", inb(0x203), i, base);
+
+	WRITE_RWA(0x70, irq);
+	dprintk(" irq: %d (%d),", inb(0x203), irq);
+
+	WRITE_RWA(0x74, dma);
+	dprintk(" dma: %d (%d)\n", inb(0x203), dma);
+
+	WRITE_RWA(0x30, 1);
+}
+
+static inline void rwa010_soundblaster_init(int sb_base, int al_base, int irq, int dma)
+{
+	int i;
+
+	WRITE_RWA(7, 1);
+
+	dprintk("SoundBlaster base: ");
+	WRITE_RWA(0x61, sb_base & 255);
+	i = inb(0x203);
+
+	WRITE_RWA(0x60, sb_base >> 8);
+	dprintk("%02X%02X (%X),", inb(0x203), i, sb_base);
+
+	dprintk(" irq: ");
+	WRITE_RWA(0x70, irq);
+	dprintk("%d (%d),", inb(0x203), irq);
+
+	dprintk(" 8-bit DMA: ");
+	WRITE_RWA(0x74, dma);
+	dprintk("%d (%d)\n", inb(0x203), dma);
+
+	dprintk("AdLib base: ");
+	WRITE_RWA(0x63, al_base & 255);
+	i = inb(0x203);
+
+	WRITE_RWA(0x62, al_base >> 8);
+	dprintk("%02X%02X (%X)\n", inb(0x203), i, al_base);
+
+	WRITE_RWA(0x30, 1);
+}
+
+static void rwa010_soundblaster_reset(void)
+{
+	int i;
+
+	outb(1, 0x226);
+	udelay(3);
+	outb(0, 0x226);
+
+	for (i = 0; i < 5; i++) {
+		if (inb(0x22e) & 0x80)
+			break;
+		mdelay(1);
+	}
+	if (i == 5)
+		printk("SoundBlaster: DSP reset failed\n");
+
+	dprintk("SoundBlaster DSP reset: %02X (AA)\n", inb(0x22a));
+
+	for (i = 0; i < 5; i++) {
+		if ((inb(0x22c) & 0x80) == 0)
+			break;
+		mdelay(1);
+	}
+
+	if (i == 5)
+		printk("SoundBlaster: DSP not ready\n");
+	else {
+		outb(0xe1, 0x22c);
+
+		dprintk("SoundBlaster DSP id: ");
+		i = inb(0x22a);
+		udelay(1);
+		i |= inb(0x22a) << 8;
+		dprintk("%04X\n", i);
+
+		for (i = 0; i < 5; i++) {
+			if ((inb(0x22c) & 0x80) == 0)
+				break;
+			mdelay(1);
+		}
+
+		if (i == 5)
+			printk("SoundBlaster: could not turn speaker off\n");
+
+		outb(0xd3, 0x22c);
+	}
+
+	/* turn on OPL3 */
+	outb(5, 0x38a);
+	outb(1, 0x38b);
+}
+
+static void __init rwa010_init(void)
+{
+	rwa010_unlock();
+	rwa010_read_ident();
+	rwa010_global_init();
+	rwa010_game_port_init();
+	rwa010_waveartist_init(0x250, 3, 7);
+	rwa010_soundblaster_init(0x220, 0x388, 3, 1);
+	rwa010_soundblaster_reset();
+}
+
+/*
+ * Initialise any other hardware after we've got the PCI bus
+ * initialised.  We may need the PCI bus to talk to this other
+ * hardware.
+ */
+static int __init nw_hw_init(void)
+{
+	if (machine_is_netwinder()) {
+		wb977_init();
+		cpld_init();
+		rwa010_init();
+	}
+	return 0;
+}
+
+__initcall(nw_hw_init);
+
+/*
+ * Older NeTTroms either do not provide a parameters
+ * page, or they don't supply correct information in
+ * the parameter page.
+ */
+static void __init
+fixup_netwinder(struct tag *tags, char **cmdline)
+{
+#ifdef CONFIG_ISAPNP
+	extern int isapnp_disable;
+
+	/*
+	 * We must not use the kernels ISAPnP code
+	 * on the NetWinder - it will reset the settings
+	 * for the WaveArtist chip and render it inoperable.
+	 */
+	isapnp_disable = 1;
+#endif
+}
+
+static void netwinder_restart(enum reboot_mode mode, const char *cmd)
+{
+	if (mode == REBOOT_SOFT) {
+		/* Jump into the ROM */
+		soft_restart(0x41000000);
+	} else {
+		local_irq_disable();
+		local_fiq_disable();
+
+		/* open up the SuperIO chip */
+		outb(0x87, 0x370);
+		outb(0x87, 0x370);
+
+		/* aux function group 1 (logical device 7) */
+		outb(0x07, 0x370);
+		outb(0x07, 0x371);
+
+		/* set GP16 for WD-TIMER output */
+		outb(0xe6, 0x370);
+		outb(0x00, 0x371);
+
+		/* set a RED LED and toggle WD_TIMER for rebooting */
+		outb(0xc4, 0x338);
+	}
+}
+
+/* LEDs */
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+struct netwinder_led {
+	struct led_classdev     cdev;
+	u8                      mask;
+};
+
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static const struct {
+	const char *name;
+	const char *trigger;
+} netwinder_leds[] = {
+	{ "netwinder:green", "heartbeat", },
+	{ "netwinder:red", "cpu0", },
+};
+
+/*
+ * The LED control in Netwinder is reversed:
+ *  - setting bit means turn off LED
+ *  - clearing bit means turn on LED
+ */
+static void netwinder_led_set(struct led_classdev *cdev,
+		enum led_brightness b)
+{
+	struct netwinder_led *led = container_of(cdev,
+			struct netwinder_led, cdev);
+	unsigned long flags;
+	u32 reg;
+
+	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
+	reg = nw_gpio_read();
+	if (b != LED_OFF)
+		reg &= ~led->mask;
+	else
+		reg |= led->mask;
+	nw_gpio_modify_op(led->mask, reg);
+	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
+}
+
+static enum led_brightness netwinder_led_get(struct led_classdev *cdev)
+{
+	struct netwinder_led *led = container_of(cdev,
+			struct netwinder_led, cdev);
+	unsigned long flags;
+	u32 reg;
+
+	raw_spin_lock_irqsave(&nw_gpio_lock, flags);
+	reg = nw_gpio_read();
+	raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
+
+	return (reg & led->mask) ? LED_OFF : LED_FULL;
+}
+
+static int __init netwinder_leds_init(void)
+{
+	int i;
+
+	if (!machine_is_netwinder())
+		return -ENODEV;
+
+	for (i = 0; i < ARRAY_SIZE(netwinder_leds); i++) {
+		struct netwinder_led *led;
+
+		led = kzalloc(sizeof(*led), GFP_KERNEL);
+		if (!led)
+			break;
+
+		led->cdev.name = netwinder_leds[i].name;
+		led->cdev.brightness_set = netwinder_led_set;
+		led->cdev.brightness_get = netwinder_led_get;
+		led->cdev.default_trigger = netwinder_leds[i].trigger;
+
+		if (i == 0)
+			led->mask = GPIO_GREEN_LED;
+		else
+			led->mask = GPIO_RED_LED;
+
+		if (led_classdev_register(NULL, &led->cdev) < 0) {
+			kfree(led);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(netwinder_leds_init);
+#endif
+
+MACHINE_START(NETWINDER, "Rebel-NetWinder")
+	/* Maintainer: Russell King/Rebel.com */
+	.atag_offset	= 0x100,
+	.video_start	= 0x000a0000,
+	.video_end	= 0x000bffff,
+	.reserve_lp0	= 1,
+	.reserve_lp2	= 1,
+	.fixup		= fixup_netwinder,
+	.map_io		= footbridge_map_io,
+	.init_irq	= footbridge_init_irq,
+	.init_time	= isa_timer_init,
+	.restart	= netwinder_restart,
+MACHINE_END
diff --git a/arch/arm/mach-footbridge/netwinder-pci.c b/arch/arm/mach-footbridge/netwinder-pci.c
new file mode 100644
index 000000000..e83043920
--- /dev/null
+++ b/arch/arm/mach-footbridge/netwinder-pci.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/netwinder-pci.c
+ *
+ * PCI bios-type initialisation for PCI machines
+ *
+ * Bits taken from various places.
+ */
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/mach-types.h>
+
+/*
+ * We now use the slot ID instead of the device identifiers to select
+ * which interrupt is routed where.
+ */
+static int netwinder_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	switch (slot) {
+	case 0:  /* host bridge */
+		return 0;
+
+	case 9:  /* CyberPro */
+		return IRQ_NETWINDER_VGA;
+
+	case 10: /* DC21143 */
+		return IRQ_NETWINDER_ETHER100;
+
+	case 12: /* Winbond 553 */
+		return IRQ_ISA_HARDDISK1;
+
+	case 13: /* Winbond 89C940F */
+		return IRQ_NETWINDER_ETHER10;
+
+	default:
+		printk(KERN_ERR "PCI: unknown device in slot %s\n",
+			pci_name(dev));
+		return 0;
+	}
+}
+
+static struct hw_pci netwinder_pci __initdata = {
+	.map_irq		= netwinder_map_irq,
+	.nr_controllers		= 1,
+	.ops			= &dc21285_ops,
+	.setup			= dc21285_setup,
+	.preinit		= dc21285_preinit,
+	.postinit		= dc21285_postinit,
+};
+
+static int __init netwinder_pci_init(void)
+{
+	if (machine_is_netwinder())
+		pci_common_init(&netwinder_pci);
+	return 0;
+}
+
+subsys_initcall(netwinder_pci_init);
diff --git a/arch/arm/mach-footbridge/personal-pci.c b/arch/arm/mach-footbridge/personal-pci.c
new file mode 100644
index 000000000..9d19aa98a
--- /dev/null
+++ b/arch/arm/mach-footbridge/personal-pci.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/personal-pci.c
+ *
+ * PCI bios-type initialisation for PCI machines
+ *
+ * Bits taken from various places.
+ */
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/mach-types.h>
+
+static int irqmap_personal_server[] = {
+	IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
+	IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
+};
+
+static int personal_server_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	unsigned char line;
+
+	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
+
+	if (line > 0x40 && line <= 0x5f) {
+		/* line corresponds to the bit controlling this interrupt
+		 * in the footbridge.  Ignore the first 8 interrupt bits,
+		 * look up the rest in the map.  IN0 is bit number 8
+		 */
+		return irqmap_personal_server[(line & 0x1f) - 8];
+	} else if (line == 0) {
+		/* no interrupt */
+		return 0;
+	} else
+		return irqmap_personal_server[(line - 1) & 3];
+}
+
+static struct hw_pci personal_server_pci __initdata = {
+	.map_irq		= personal_server_map_irq,
+	.nr_controllers		= 1,
+	.ops			= &dc21285_ops,
+	.setup			= dc21285_setup,
+	.preinit		= dc21285_preinit,
+	.postinit		= dc21285_postinit,
+};
+
+static int __init personal_pci_init(void)
+{
+	if (machine_is_personal_server())
+		pci_common_init(&personal_server_pci);
+	return 0;
+}
+
+subsys_initcall(personal_pci_init);
diff --git a/arch/arm/mach-footbridge/personal.c b/arch/arm/mach-footbridge/personal.c
new file mode 100644
index 000000000..ca715754f
--- /dev/null
+++ b/arch/arm/mach-footbridge/personal.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/arm/mach-footbridge/personal.c
+ *
+ * Personal server (Skiff) machine fixup
+ */
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware/dec21285.h>
+#include <asm/mach-types.h>
+
+#include <asm/mach/arch.h>
+
+#include "common.h"
+
+MACHINE_START(PERSONAL_SERVER, "Compaq-PersonalServer")
+	/* Maintainer: Jamey Hicks / George France */
+	.atag_offset	= 0x100,
+	.map_io		= footbridge_map_io,
+	.init_irq	= footbridge_init_irq,
+	.init_time	= footbridge_timer_init,
+	.restart	= footbridge_restart,
+MACHINE_END
+
-- 
cgit v1.2.3