Linux-2.6.12-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!

4 files changed, 460 insertions, 0 deletions

diff --git a/arch/arm26/machine/Makefile b/arch/arm26/machine/Makefile
new file mode 100644
index 0000000..86ea97c
--- /dev/null
+++ b/arch/arm26/machine/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+
+obj-y			:= dma.o irq.o latches.o
+
diff --git a/arch/arm26/machine/dma.c b/arch/arm26/machine/dma.c
new file mode 100644
index 0000000..cbc7c61
--- /dev/null
+++ b/arch/arm26/machine/dma.c
@@ -0,0 +1,215 @@
+/*
+ *  linux/arch/arm26/kernel/dma.c
+ *
+ *  Copyright (C) 1998-1999 Dave Gilbert / Russell King
+ *  Copyright (C) 2003 Ian Molton
+ *
+ * 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.
+ *
+ *  DMA functions specific to Archimedes and A5000 architecture
+ */
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#include <asm/dma.h>
+#include <asm/fiq.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+
+#define DPRINTK(x...) printk(KERN_DEBUG x)
+
+#if defined(CONFIG_BLK_DEV_FD1772) || defined(CONFIG_BLK_DEV_FD1772_MODULE)
+
+extern unsigned char fdc1772_dma_read, fdc1772_dma_read_end;
+extern unsigned char fdc1772_dma_write, fdc1772_dma_write_end;
+extern void fdc1772_setupdma(unsigned int count,unsigned int addr);
+
+static void arc_floppy_data_enable_dma(dmach_t channel, dma_t *dma)
+{
+	DPRINTK("arc_floppy_data_enable_dma\n");
+
+	if (dma->using_sg)
+		BUG();
+
+	switch (dma->dma_mode) {
+	case DMA_MODE_READ: { /* read */
+		unsigned long flags;
+		DPRINTK("enable_dma fdc1772 data read\n");
+		local_save_flags_cli(flags);
+		clf();
+			
+		memcpy ((void *)0x1c, (void *)&fdc1772_dma_read,
+			&fdc1772_dma_read_end - &fdc1772_dma_read);
+		fdc1772_setupdma(dma->buf.length, dma->buf.__address); /* Sets data pointer up */
+		enable_fiq(FIQ_FLOPPYDATA);
+		local_irq_restore(flags);
+	   }
+	   break;
+
+	case DMA_MODE_WRITE: { /* write */
+		unsigned long flags;
+		DPRINTK("enable_dma fdc1772 data write\n");
+		local_save_flags_cli(flags);
+		clf();
+		memcpy ((void *)0x1c, (void *)&fdc1772_dma_write,
+			&fdc1772_dma_write_end - &fdc1772_dma_write);
+		fdc1772_setupdma(dma->buf.length, dma->buf.__address); /* Sets data pointer up */
+		enable_fiq(FIQ_FLOPPYDATA);
+
+		local_irq_restore(flags);
+	    }
+	    break;
+	default:
+		printk ("enable_dma: dma%d not initialised\n", channel);
+	}
+}
+
+static int arc_floppy_data_get_dma_residue(dmach_t channel, dma_t *dma)
+{
+	extern unsigned int fdc1772_bytestogo;
+
+	/* 10/1/1999 DAG - I presume its the number of bytes left? */
+	return fdc1772_bytestogo;
+}
+
+static void arc_floppy_cmdend_enable_dma(dmach_t channel, dma_t *dma)
+{
+	/* Need to build a branch at the FIQ address */
+	extern void fdc1772_comendhandler(void);
+	unsigned long flags;
+
+	DPRINTK("arc_floppy_cmdend_enable_dma\n");
+	/*printk("enable_dma fdc1772 command end FIQ\n");*/
+	save_flags(flags);
+	clf();
+	
+	/* B fdc1772_comendhandler */
+	*((unsigned int *)0x1c)=0xea000000 |
+			(((unsigned int)fdc1772_comendhandler-(0x1c+8))/4);
+
+	local_irq_restore(flags);
+}
+
+static int arc_floppy_cmdend_get_dma_residue(dmach_t channel, dma_t *dma)
+{
+	/* 10/1/1999 DAG - Presume whether there is an outstanding command? */
+	extern unsigned int fdc1772_fdc_int_done;
+
+	/* Explicit! If the int done is 0 then 1 int to go */
+	return (fdc1772_fdc_int_done==0)?1:0;
+}
+
+static void arc_disable_dma(dmach_t channel, dma_t *dma)
+{
+	disable_fiq(dma->dma_irq);
+}
+
+static struct dma_ops arc_floppy_data_dma_ops = {
+	.type		= "FIQDMA",
+	.enable		= arc_floppy_data_enable_dma,
+	.disable	= arc_disable_dma,
+	.residue	= arc_floppy_data_get_dma_residue,
+};
+
+static struct dma_ops arc_floppy_cmdend_dma_ops = {
+	.type		= "FIQCMD",
+	.enable		= arc_floppy_cmdend_enable_dma,
+	.disable	= arc_disable_dma,
+	.residue	= arc_floppy_cmdend_get_dma_residue,
+};
+#endif
+
+#ifdef CONFIG_ARCH_A5K
+static struct fiq_handler fh = {
+	.name	= "floppydata"
+};
+
+static int a5k_floppy_get_dma_residue(dmach_t channel, dma_t *dma)
+{
+	struct pt_regs regs;
+	get_fiq_regs(&regs);
+	return regs.ARM_r9;
+}
+
+static void a5k_floppy_enable_dma(dmach_t channel, dma_t *dma)
+{
+	struct pt_regs regs;
+	void *fiqhandler_start;
+	unsigned int fiqhandler_length;
+	extern void floppy_fiqsetup(unsigned long len, unsigned long addr,
+				     unsigned long port);
+
+	if (dma->using_sg)
+		BUG();
+
+	if (dma->dma_mode == DMA_MODE_READ) {
+		extern unsigned char floppy_fiqin_start, floppy_fiqin_end;
+		fiqhandler_start = &floppy_fiqin_start;
+		fiqhandler_length = &floppy_fiqin_end - &floppy_fiqin_start;
+	} else {
+		extern unsigned char floppy_fiqout_start, floppy_fiqout_end;
+		fiqhandler_start = &floppy_fiqout_start;
+		fiqhandler_length = &floppy_fiqout_end - &floppy_fiqout_start;
+	}
+	if (claim_fiq(&fh)) {
+		printk("floppydma: couldn't claim FIQ.\n");
+		return;
+	}
+	memcpy((void *)0x1c, fiqhandler_start, fiqhandler_length);
+	regs.ARM_r9 = dma->buf.length;
+	regs.ARM_r10 = (unsigned long)dma->buf.__address;
+	regs.ARM_fp = FLOPPYDMA_BASE;
+	set_fiq_regs(&regs);
+	enable_fiq(dma->dma_irq);
+}
+
+static void a5k_floppy_disable_dma(dmach_t channel, dma_t *dma)
+{
+	disable_fiq(dma->dma_irq);
+	release_fiq(&fh);
+}
+
+static struct dma_ops a5k_floppy_dma_ops = {
+	.type		= "FIQDMA",
+	.enable		= a5k_floppy_enable_dma,
+	.disable	= a5k_floppy_disable_dma,
+	.residue	= a5k_floppy_get_dma_residue,
+};
+#endif
+
+/*
+ * This is virtual DMA - we don't need anything here
+ */
+static void sound_enable_disable_dma(dmach_t channel, dma_t *dma)
+{
+}
+
+static struct dma_ops sound_dma_ops = {
+	.type		= "VIRTUAL",
+	.enable		= sound_enable_disable_dma,
+	.disable	= sound_enable_disable_dma,
+};
+
+void __init arch_dma_init(dma_t *dma)
+{
+#if defined(CONFIG_BLK_DEV_FD1772) || defined(CONFIG_BLK_DEV_FD1772_MODULE)
+	if (machine_is_archimedes()) {
+		dma[DMA_VIRTUAL_FLOPPY0].dma_irq = FIQ_FLOPPYDATA;
+		dma[DMA_VIRTUAL_FLOPPY0].d_ops   = &arc_floppy_data_dma_ops;
+		dma[DMA_VIRTUAL_FLOPPY1].dma_irq = 1;
+		dma[DMA_VIRTUAL_FLOPPY1].d_ops   = &arc_floppy_cmdend_dma_ops;
+	}
+#endif
+#ifdef CONFIG_ARCH_A5K
+	if (machine_is_a5k()) {
+		dma[DMA_VIRTUAL_FLOPPY0].dma_irq = FIQ_FLOPPYDATA;
+		dma[DMA_VIRTUAL_FLOPPY0].d_ops   = &a5k_floppy_dma_ops;
+	}
+#endif
+	dma[DMA_VIRTUAL_SOUND].d_ops = &sound_dma_ops;
+}
diff --git a/arch/arm26/machine/irq.c b/arch/arm26/machine/irq.c
new file mode 100644
index 0000000..4361863
--- /dev/null
+++ b/arch/arm26/machine/irq.c
@@ -0,0 +1,165 @@
+/*
+ *  linux/arch/arm26/mach-arc/irq.c
+ *
+ *  Copyright (C) 1996 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:
+ *   24-09-1996	RMK	Created
+ *   10-10-1996	RMK	Brought up to date with arch-sa110eval
+ *   22-10-1996	RMK	Changed interrupt numbers & uses new inb/outb macros
+ *   11-01-1998	RMK	Added mask_and_ack_irq
+ *   22-08-1998	RMK	Restructured IRQ routines
+ *   08-09-2002 IM	Brought up to date for 2.5
+ *   01-06-2003 JMA     Removed arc_fiq_chip
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/irqchip.h>
+#include <asm/ioc.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+extern void init_FIQ(void);
+
+#define a_clf()	clf()
+#define a_stf()	stf()
+
+static void arc_ack_irq_a(unsigned int irq)
+{
+	unsigned int val, mask;
+
+	mask = 1 << irq;
+	a_clf();
+	val = ioc_readb(IOC_IRQMASKA);
+	ioc_writeb(val & ~mask, IOC_IRQMASKA);
+	ioc_writeb(mask, IOC_IRQCLRA);
+	a_stf();
+}
+
+static void arc_mask_irq_a(unsigned int irq)
+{
+	unsigned int val, mask;
+
+	mask = 1 << irq;
+	a_clf();
+	val = ioc_readb(IOC_IRQMASKA);
+	ioc_writeb(val & ~mask, IOC_IRQMASKA);
+	a_stf();
+}
+
+static void arc_unmask_irq_a(unsigned int irq)
+{
+	unsigned int val, mask;
+
+	mask = 1 << irq;
+	a_clf();
+	val = ioc_readb(IOC_IRQMASKA);
+	ioc_writeb(val | mask, IOC_IRQMASKA);
+	a_stf();
+}
+
+static struct irqchip arc_a_chip = {
+        .ack    = arc_ack_irq_a,
+        .mask   = arc_mask_irq_a,
+        .unmask = arc_unmask_irq_a,
+};
+
+static void arc_mask_irq_b(unsigned int irq)
+{
+	unsigned int val, mask;
+	mask = 1 << (irq & 7);
+	val = ioc_readb(IOC_IRQMASKB);
+	ioc_writeb(val & ~mask, IOC_IRQMASKB);
+}
+
+static void arc_unmask_irq_b(unsigned int irq)
+{
+	unsigned int val, mask;
+
+	mask = 1 << (irq & 7);
+	val = ioc_readb(IOC_IRQMASKB);
+	ioc_writeb(val | mask, IOC_IRQMASKB);
+}
+
+static struct irqchip arc_b_chip = {
+        .ack    = arc_mask_irq_b,
+        .mask   = arc_mask_irq_b,
+        .unmask = arc_unmask_irq_b,
+};
+
+/* FIXME - JMA none of these functions are used in arm26 currently
+static void arc_mask_irq_fiq(unsigned int irq)
+{
+	unsigned int val, mask;
+
+	mask = 1 << (irq & 7);
+	val = ioc_readb(IOC_FIQMASK);
+	ioc_writeb(val & ~mask, IOC_FIQMASK);
+}
+
+static void arc_unmask_irq_fiq(unsigned int irq)
+{
+	unsigned int val, mask;
+
+	mask = 1 << (irq & 7);
+	val = ioc_readb(IOC_FIQMASK);
+	ioc_writeb(val | mask, IOC_FIQMASK);
+}
+
+static struct irqchip arc_fiq_chip = {
+        .ack    = arc_mask_irq_fiq,
+        .mask   = arc_mask_irq_fiq,
+        .unmask = arc_unmask_irq_fiq,
+};
+*/
+
+void __init arc_init_irq(void)
+{
+	unsigned int irq, flags;
+
+	/* Disable all IOC interrupt sources */
+	ioc_writeb(0, IOC_IRQMASKA);
+	ioc_writeb(0, IOC_IRQMASKB);
+	ioc_writeb(0, IOC_FIQMASK);
+
+	for (irq = 0; irq < NR_IRQS; irq++) {
+		flags = IRQF_VALID;
+		
+		if (irq <= 6 || (irq >= 9 && irq <= 15))
+                        flags |= IRQF_PROBE;
+	
+		if (irq == IRQ_KEYBOARDTX)
+                        flags |= IRQF_NOAUTOEN;	
+		
+		switch (irq) {
+		case 0 ... 7:
+			set_irq_chip(irq, &arc_a_chip);
+                        set_irq_handler(irq, do_level_IRQ);
+                        set_irq_flags(irq, flags);
+			break;
+
+		case 8 ... 15:
+			set_irq_chip(irq, &arc_b_chip);
+                        set_irq_handler(irq, do_level_IRQ);
+                        set_irq_flags(irq, flags);
+
+/*		case 64 ... 72:
+			set_irq_chip(irq, &arc_fiq_chip);
+                        set_irq_flags(irq, flags);
+			break;
+*/
+
+		}
+	}
+
+	irq_desc[IRQ_KEYBOARDTX].noautoenable = 1;
+
+	init_FIQ();
+}
+
diff --git a/arch/arm26/machine/latches.c b/arch/arm26/machine/latches.c
new file mode 100644
index 0000000..94f05d2
--- /dev/null
+++ b/arch/arm26/machine/latches.c
@@ -0,0 +1,72 @@
+/*
+ *  linux/arch/arm26/kernel/latches.c
+ *
+ *  Copyright (C) David Alan Gilbert 1995/1996,2000
+ *  Copyright (C) Ian Molton 2003
+ *
+ * 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.
+ *
+ *  Support for the latches on the old Archimedes which control the floppy,
+ *  hard disc and printer
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/oldlatches.h>
+
+static unsigned char latch_a_copy;
+static unsigned char latch_b_copy;
+
+/* newval=(oldval & ~mask)|newdata */
+void oldlatch_aupdate(unsigned char mask,unsigned char newdata)
+{
+	unsigned long flags;
+
+	BUG_ON(!machine_is_archimedes());
+
+	local_irq_save(flags); //FIXME: was local_save_flags
+	latch_a_copy = (latch_a_copy & ~mask) | newdata;
+	__raw_writeb(latch_a_copy, LATCHA_BASE);
+	local_irq_restore(flags);
+
+	printk("Latch: A = 0x%02x\n", latch_a_copy);
+}
+
+
+/* newval=(oldval & ~mask)|newdata */
+void oldlatch_bupdate(unsigned char mask,unsigned char newdata)
+{
+	unsigned long flags;
+
+	BUG_ON(!machine_is_archimedes());
+
+
+	local_irq_save(flags);//FIXME: was local_save_flags
+	latch_b_copy = (latch_b_copy & ~mask) | newdata;
+	__raw_writeb(latch_b_copy, LATCHB_BASE);
+	local_irq_restore(flags);
+
+	printk("Latch: B = 0x%02x\n", latch_b_copy);
+}
+
+static int __init oldlatch_init(void)
+{
+	if (machine_is_archimedes()) {
+		oldlatch_aupdate(0xff, 0xff);
+		/* Thats no FDC reset...*/
+		oldlatch_bupdate(0xff, LATCHB_FDCRESET);
+	}
+	return 0;
+}
+
+arch_initcall(oldlatch_init);
+
+EXPORT_SYMBOL(oldlatch_aupdate);
+EXPORT_SYMBOL(oldlatch_bupdate);