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!

1 files changed, 215 insertions, 0 deletions

diff --git a/arch/arm26/machine/dma.c b/arch/arm26/machine/dma.c
new file mode 100644
index 00000000000..cbc7c61d5b3
--- /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;
+}