PATCH powerpc Merge asm-ppc*/dma.h

[Jon Loeliger <linuxppc@jdl.com>]

This patch merges the asm-ppc*/dma.h files.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
---


 arch/ppc/kernel/setup.c   |    3 
 include/asm-powerpc/dma.h |  390 +++++++++++++++++++++++++++++++++++++++++++++
 include/asm-ppc/dma.h     |  371 -------------------------------------------
 include/asm-ppc64/dma.h   |  329 --------------------------------------
 4 files changed, 392 insertions(+), 701 deletions(-)


diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
--- a/arch/ppc/kernel/setup.c
+++ b/arch/ppc/kernel/setup.c
@@ -71,7 +71,8 @@ struct ide_machdep_calls ppc_ide_md;
 unsigned long boot_mem_size;
 
 unsigned long ISA_DMA_THRESHOLD;
-unsigned long DMA_MODE_READ, DMA_MODE_WRITE;
+unsigned int DMA_MODE_READ;
+unsigned int DMA_MODE_WRITE;
 
 #ifdef CONFIG_PPC_MULTIPLATFORM
 int _machine = 0;
diff --git a/include/asm-powerpc/dma.h b/include/asm-powerpc/dma.h
new file mode 100644
--- /dev/null
+++ b/include/asm-powerpc/dma.h
@@ -0,0 +1,390 @@
+#ifndef _ASM_POWERPC_DMA_H
+#define _ASM_POWERPC_DMA_H
+
+/*
+ * Defines for using and allocating dma channels.
+ * Written by Hennus Bergman, 1992.
+ * High DMA channel support & info by Hannu Savolainen
+ * and John Boyd, Nov. 1992.
+ * Changes for ppc sound by Christoph Nadig
+ */
+
+/*
+ * Note: Adapted for PowerPC by Gary Thomas
+ * Modified by Cort Dougan <cort@cs.nmt.edu>
+ *
+ * None of this really applies for Power Macintoshes.  There is
+ * basically just enough here to get kernel/dma.c to compile.
+ *
+ * There may be some comments or restrictions made here which are
+ * not valid for the PReP platform.  Take what you read
+ * with a grain of salt.
+ */
+
+#include <linux/config.h>
+#include <asm/io.h>
+#include <linux/spinlock.h>
+#include <asm/system.h>
+
+#ifndef MAX_DMA_CHANNELS
+#define MAX_DMA_CHANNELS	8
+#endif
+
+/* The maximum address that we can perform a DMA transfer to on this platform */
+/* Doesn't really apply... */
+#define MAX_DMA_ADDRESS		(~0UL)
+
+#if !defined(CONFIG_PPC_ISERIES) || defined(CONFIG_PCI)
+
+#ifdef HAVE_REALLY_SLOW_DMA_CONTROLLER
+#define dma_outb	outb_p
+#else
+#define dma_outb	outb
+#endif
+
+#define dma_inb		inb
+
+/*
+ * NOTES about DMA transfers:
+ *
+ *  controller 1: channels 0-3, byte operations, ports 00-1F
+ *  controller 2: channels 4-7, word operations, ports C0-DF
+ *
+ *  - ALL registers are 8 bits only, regardless of transfer size
+ *  - channel 4 is not used - cascades 1 into 2.
+ *  - channels 0-3 are byte - addresses/counts are for physical bytes
+ *  - channels 5-7 are word - addresses/counts are for physical words
+ *  - transfers must not cross physical 64K (0-3) or 128K (5-7) boundaries
+ *  - transfer count loaded to registers is 1 less than actual count
+ *  - controller 2 offsets are all even (2x offsets for controller 1)
+ *  - page registers for 5-7 don't use data bit 0, represent 128K pages
+ *  - page registers for 0-3 use bit 0, represent 64K pages
+ *
+ * On PReP, DMA transfers are limited to the lower 16MB of _physical_ memory.
+ * On CHRP, the W83C553F (and VLSI Tollgate?) support full 32 bit addressing.
+ * Note that addresses loaded into registers must be _physical_ addresses,
+ * not logical addresses (which may differ if paging is active).
+ *
+ *  Address mapping for channels 0-3:
+ *
+ *   A23 ... A16 A15 ... A8  A7 ... A0    (Physical addresses)
+ *    |  ...  |   |  ... |   |  ... |
+ *    |  ...  |   |  ... |   |  ... |
+ *    |  ...  |   |  ... |   |  ... |
+ *   P7  ...  P0  A7 ... A0  A7 ... A0
+ * |    Page    | Addr MSB | Addr LSB |   (DMA registers)
+ *
+ *  Address mapping for channels 5-7:
+ *
+ *   A23 ... A17 A16 A15 ... A9 A8 A7 ... A1 A0    (Physical addresses)
+ *    |  ...  |   \   \   ... \  \  \  ... \  \
+ *    |  ...  |    \   \   ... \  \  \  ... \  (not used)
+ *    |  ...  |     \   \   ... \  \  \  ... \
+ *   P7  ...  P1 (0) A7 A6  ... A0 A7 A6 ... A0
+ * |      Page      |  Addr MSB   |  Addr LSB  |   (DMA registers)
+ *
+ * Again, channels 5-7 transfer _physical_ words (16 bits), so addresses
+ * and counts _must_ be word-aligned (the lowest address bit is _ignored_ at
+ * the hardware level, so odd-byte transfers aren't possible).
+ *
+ * Transfer count (_not # bytes_) is limited to 64K, represented as actual
+ * count - 1 : 64K => 0xFFFF, 1 => 0x0000.  Thus, count is always 1 or more,
+ * and up to 128K bytes may be transferred on channels 5-7 in one operation.
+ *
+ */
+
+/* see prep_setup_arch() for detailed informations */
+#if defined(CONFIG_SOUND_CS4232) && defined(CONFIG_PPC_PREP)
+extern long ppc_cs4232_dma, ppc_cs4232_dma2;
+#define SND_DMA1 ppc_cs4232_dma
+#define SND_DMA2 ppc_cs4232_dma2
+#else
+#define SND_DMA1 -1
+#define SND_DMA2 -1
+#endif
+
+/* 8237 DMA controllers */
+#define IO_DMA1_BASE	0x00	/* 8 bit slave DMA, channels 0..3 */
+#define IO_DMA2_BASE	0xC0	/* 16 bit master DMA, ch 4(=slave input)..7 */
+
+/* DMA controller registers */
+#define DMA1_CMD_REG		0x08	/* command register (w) */
+#define DMA1_STAT_REG		0x08	/* status register (r) */
+#define DMA1_REQ_REG		0x09	/* request register (w) */
+#define DMA1_MASK_REG		0x0A	/* single-channel mask (w) */
+#define DMA1_MODE_REG		0x0B	/* mode register (w) */
+#define DMA1_CLEAR_FF_REG	0x0C	/* clear pointer flip-flop (w) */
+#define DMA1_TEMP_REG		0x0D	/* Temporary Register (r) */
+#define DMA1_RESET_REG		0x0D	/* Master Clear (w) */
+#define DMA1_CLR_MASK_REG	0x0E	/* Clear Mask */
+#define DMA1_MASK_ALL_REG	0x0F	/* all-channels mask (w) */
+
+#define DMA2_CMD_REG		0xD0	/* command register (w) */
+#define DMA2_STAT_REG		0xD0	/* status register (r) */
+#define DMA2_REQ_REG		0xD2	/* request register (w) */
+#define DMA2_MASK_REG		0xD4	/* single-channel mask (w) */
+#define DMA2_MODE_REG		0xD6	/* mode register (w) */
+#define DMA2_CLEAR_FF_REG	0xD8	/* clear pointer flip-flop (w) */
+#define DMA2_TEMP_REG		0xDA	/* Temporary Register (r) */
+#define DMA2_RESET_REG		0xDA	/* Master Clear (w) */
+#define DMA2_CLR_MASK_REG	0xDC	/* Clear Mask */
+#define DMA2_MASK_ALL_REG	0xDE	/* all-channels mask (w) */
+
+#define DMA_ADDR_0		0x00	/* DMA address registers */
+#define DMA_ADDR_1		0x02
+#define DMA_ADDR_2		0x04
+#define DMA_ADDR_3		0x06
+#define DMA_ADDR_4		0xC0
+#define DMA_ADDR_5		0xC4
+#define DMA_ADDR_6		0xC8
+#define DMA_ADDR_7		0xCC
+
+#define DMA_CNT_0		0x01	/* DMA count registers */
+#define DMA_CNT_1		0x03
+#define DMA_CNT_2		0x05
+#define DMA_CNT_3		0x07
+#define DMA_CNT_4		0xC2
+#define DMA_CNT_5		0xC6
+#define DMA_CNT_6		0xCA
+#define DMA_CNT_7		0xCE
+
+#define DMA_LO_PAGE_0		0x87	/* DMA page registers */
+#define DMA_LO_PAGE_1		0x83
+#define DMA_LO_PAGE_2		0x81
+#define DMA_LO_PAGE_3		0x82
+#define DMA_LO_PAGE_5		0x8B
+#define DMA_LO_PAGE_6		0x89
+#define DMA_LO_PAGE_7		0x8A
+
+#define DMA_HI_PAGE_0		0x487	/* DMA page registers */
+#define DMA_HI_PAGE_1		0x483
+#define DMA_HI_PAGE_2		0x481
+#define DMA_HI_PAGE_3		0x482
+#define DMA_HI_PAGE_5		0x48B
+#define DMA_HI_PAGE_6		0x489
+#define DMA_HI_PAGE_7		0x48A
+
+#define DMA1_EXT_REG		0x40B
+#define DMA2_EXT_REG		0x4D6
+
+#ifndef __powerpc64__
+    /* in arch/ppc/kernel/setup.c -- Cort */
+    extern unsigned int DMA_MODE_WRITE;
+    extern unsigned int DMA_MODE_READ;
+    extern unsigned long ISA_DMA_THRESHOLD;
+#else
+    #define DMA_MODE_READ	0x44	/* I/O to memory, no autoinit, increment, single mode */
+    #define DMA_MODE_WRITE	0x48	/* memory to I/O, no autoinit, increment, single mode */
+#endif
+
+#define DMA_MODE_CASCADE	0xC0	/* pass thru DREQ->HRQ, DACK<-HLDA only */
+
+#define DMA_AUTOINIT		0x10
+
+extern spinlock_t dma_spin_lock;
+
+static __inline__ unsigned long claim_dma_lock(void)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&dma_spin_lock, flags);
+	return flags;
+}
+
+static __inline__ void release_dma_lock(unsigned long flags)
+{
+	spin_unlock_irqrestore(&dma_spin_lock, flags);
+}
+
+/* enable/disable a specific DMA channel */
+static __inline__ void enable_dma(unsigned int dmanr)
+{
+	unsigned char ucDmaCmd = 0x00;
+
+	if (dmanr != 4) {
+		dma_outb(0, DMA2_MASK_REG);	/* This may not be enabled */
+		dma_outb(ucDmaCmd, DMA2_CMD_REG);	/* Enable group */
+	}
+	if (dmanr <= 3) {
+		dma_outb(dmanr, DMA1_MASK_REG);
+		dma_outb(ucDmaCmd, DMA1_CMD_REG);	/* Enable group */
+	} else {
+		dma_outb(dmanr & 3, DMA2_MASK_REG);
+	}
+}
+
+static __inline__ void disable_dma(unsigned int dmanr)
+{
+	if (dmanr <= 3)
+		dma_outb(dmanr | 4, DMA1_MASK_REG);
+	else
+		dma_outb((dmanr & 3) | 4, DMA2_MASK_REG);
+}
+
+/* Clear the 'DMA Pointer Flip Flop'.
+ * Write 0 for LSB/MSB, 1 for MSB/LSB access.
+ * Use this once to initialize the FF to a known state.
+ * After that, keep track of it. :-)
+ * --- In order to do that, the DMA routines below should ---
+ * --- only be used while interrupts are disabled! ---
+ */
+static __inline__ void clear_dma_ff(unsigned int dmanr)
+{
+	if (dmanr <= 3)
+		dma_outb(0, DMA1_CLEAR_FF_REG);
+	else
+		dma_outb(0, DMA2_CLEAR_FF_REG);
+}
+
+/* set mode (above) for a specific DMA channel */
+static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
+{
+	if (dmanr <= 3)
+		dma_outb(mode | dmanr, DMA1_MODE_REG);
+	else
+		dma_outb(mode | (dmanr & 3), DMA2_MODE_REG);
+}
+
+/* Set only the page register bits of the transfer address.
+ * This is used for successive transfers when we know the contents of
+ * the lower 16 bits of the DMA current address register, but a 64k boundary
+ * may have been crossed.
+ */
+static __inline__ void set_dma_page(unsigned int dmanr, int pagenr)
+{
+	switch (dmanr) {
+	case 0:
+		dma_outb(pagenr, DMA_LO_PAGE_0);
+		dma_outb(pagenr >> 8, DMA_HI_PAGE_0);
+		break;
+	case 1:
+		dma_outb(pagenr, DMA_LO_PAGE_1);
+		dma_outb(pagenr >> 8, DMA_HI_PAGE_1);
+		break;
+	case 2:
+		dma_outb(pagenr, DMA_LO_PAGE_2);
+		dma_outb(pagenr >> 8, DMA_HI_PAGE_2);
+		break;
+	case 3:
+		dma_outb(pagenr, DMA_LO_PAGE_3);
+		dma_outb(pagenr >> 8, DMA_HI_PAGE_3);
+		break;
+	case 5:
+		if (SND_DMA1 == 5 || SND_DMA2 == 5)
+			dma_outb(pagenr, DMA_LO_PAGE_5);
+		else
+			dma_outb(pagenr & 0xfe, DMA_LO_PAGE_5);
+		dma_outb(pagenr >> 8, DMA_HI_PAGE_5);
+		break;
+	case 6:
+		if (SND_DMA1 == 6 || SND_DMA2 == 6)
+			dma_outb(pagenr, DMA_LO_PAGE_6);
+		else
+			dma_outb(pagenr & 0xfe, DMA_LO_PAGE_6);
+		dma_outb(pagenr >> 8, DMA_HI_PAGE_6);
+		break;
+	case 7:
+		if (SND_DMA1 == 7 || SND_DMA2 == 7)
+			dma_outb(pagenr, DMA_LO_PAGE_7);
+		else
+			dma_outb(pagenr & 0xfe, DMA_LO_PAGE_7);
+		dma_outb(pagenr >> 8, DMA_HI_PAGE_7);
+		break;
+	}
+}
+
+/* Set transfer address & page bits for specific DMA channel.
+ * Assumes dma flipflop is clear.
+ */
+static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int phys)
+{
+	if (dmanr <= 3) {
+		dma_outb(phys & 0xff,
+			 ((dmanr & 3) << 1) + IO_DMA1_BASE);
+		dma_outb((phys >> 8) & 0xff,
+			 ((dmanr & 3) << 1) + IO_DMA1_BASE);
+	} else if (dmanr == SND_DMA1 || dmanr == SND_DMA2) {
+		dma_outb(phys & 0xff,
+			 ((dmanr & 3) << 2) + IO_DMA2_BASE);
+		dma_outb((phys >> 8) & 0xff,
+			 ((dmanr & 3) << 2) + IO_DMA2_BASE);
+		dma_outb((dmanr & 3), DMA2_EXT_REG);
+	} else {
+		dma_outb((phys >> 1) & 0xff,
+			 ((dmanr & 3) << 2) + IO_DMA2_BASE);
+		dma_outb((phys >> 9) & 0xff,
+			 ((dmanr & 3) << 2) + IO_DMA2_BASE);
+	}
+	set_dma_page(dmanr, phys >> 16);
+}
+
+
+/* Set transfer size (max 64k for DMA1..3, 128k for DMA5..7) for
+ * a specific DMA channel.
+ * You must ensure the parameters are valid.
+ * NOTE: from a manual: "the number of transfers is one more
+ * than the initial word count"! This is taken into account.
+ * Assumes dma flip-flop is clear.
+ * NOTE 2: "count" represents _bytes_ and must be even for channels 5-7.
+ */
+static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
+{
+	count--;
+	if (dmanr <= 3) {
+		dma_outb(count & 0xff,
+			 ((dmanr & 3) << 1) + 1 + IO_DMA1_BASE);
+		dma_outb((count >> 8) & 0xff,
+			 ((dmanr & 3) << 1) + 1 + IO_DMA1_BASE);
+	} else if (dmanr == SND_DMA1 || dmanr == SND_DMA2) {
+		dma_outb(count & 0xff,
+			 ((dmanr & 3) << 2) + 2 + IO_DMA2_BASE);
+		dma_outb((count >> 8) & 0xff,
+			 ((dmanr & 3) << 2) + 2 + IO_DMA2_BASE);
+	} else {
+		dma_outb((count >> 1) & 0xff,
+			 ((dmanr & 3) << 2) + 2 + IO_DMA2_BASE);
+		dma_outb((count >> 9) & 0xff,
+			 ((dmanr & 3) << 2) + 2 + IO_DMA2_BASE);
+	}
+}
+
+
+/* Get DMA residue count. After a DMA transfer, this
+ * should return zero. Reading this while a DMA transfer is
+ * still in progress will return unpredictable results.
+ * If called before the channel has been used, it may return 1.
+ * Otherwise, it returns the number of _bytes_ left to transfer.
+ *
+ * Assumes DMA flip-flop is clear.
+ */
+static __inline__ int get_dma_residue(unsigned int dmanr)
+{
+	unsigned int io_port = (dmanr <= 3)
+	    ? ((dmanr & 3) << 1) + 1 + IO_DMA1_BASE
+	    : ((dmanr & 3) << 2) + 2 + IO_DMA2_BASE;
+
+	/* using short to get 16-bit wrap around */
+	unsigned short count;
+
+	count = 1 + dma_inb(io_port);
+	count += dma_inb(io_port) << 8;
+
+	return (dmanr <= 3 || dmanr == SND_DMA1 || dmanr == SND_DMA2)
+	    ? count : (count << 1);
+}
+
+/* These are in kernel/dma.c: */
+
+/* reserve a DMA channel */
+extern int request_dma(unsigned int dmanr, const char *device_id);
+/* release it again */
+extern void free_dma(unsigned int dmanr);
+
+#ifdef CONFIG_PCI
+extern int isa_dma_bridge_buggy;
+#else
+#define isa_dma_bridge_buggy	(0)
+#endif
+
+#endif	/* !defined(CONFIG_PPC_ISERIES) || defined(CONFIG_PCI) */
+
+#endif	/* _ASM_POWERPC_DMA_H */
diff --git a/include/asm-ppc/dma.h b/include/asm-ppc/dma.h
deleted file mode 100644
--- a/include/asm-ppc/dma.h
+++ /dev/null
@@ -1,371 +0,0 @@
-/*
- * include/asm-ppc/dma.h: Defines for using and allocating dma channels.
- * Written by Hennus Bergman, 1992.
- * High DMA channel support & info by Hannu Savolainen
- * and John Boyd, Nov. 1992.
- * Changes for ppc sound by Christoph Nadig
- */
-
-#ifdef __KERNEL__
-
-#include <linux/config.h>
-#include <asm/io.h>
-#include <linux/spinlock.h>
-#include <asm/system.h>
-
-/*
- * Note: Adapted for PowerPC by Gary Thomas
- * Modified by Cort Dougan <cort@cs.nmt.edu>
- *
- * None of this really applies for Power Macintoshes.  There is
- * basically just enough here to get kernel/dma.c to compile.
- *
- * There may be some comments or restrictions made here which are
- * not valid for the PReP platform.  Take what you read
- * with a grain of salt.
- */
-
-#ifndef _ASM_DMA_H
-#define _ASM_DMA_H
-
-#ifndef MAX_DMA_CHANNELS
-#define MAX_DMA_CHANNELS	8
-#endif
-
-/* The maximum address that we can perform a DMA transfer to on this platform */
-/* Doesn't really apply... */
-#define MAX_DMA_ADDRESS		0xFFFFFFFF
-
-/* in arch/ppc/kernel/setup.c -- Cort */
-extern unsigned long DMA_MODE_WRITE, DMA_MODE_READ;
-extern unsigned long ISA_DMA_THRESHOLD;
-
-#ifdef HAVE_REALLY_SLOW_DMA_CONTROLLER
-#define dma_outb	outb_p
-#else
-#define dma_outb	outb
-#endif
-
-#define dma_inb		inb
-
-/*
- * NOTES about DMA transfers:
- *
- *  controller 1: channels 0-3, byte operations, ports 00-1F
- *  controller 2: channels 4-7, word operations, ports C0-DF
- *
- *  - ALL registers are 8 bits only, regardless of transfer size
- *  - channel 4 is not used - cascades 1 into 2.
- *  - channels 0-3 are byte - addresses/counts are for physical bytes
- *  - channels 5-7 are word - addresses/counts are for physical words
- *  - transfers must not cross physical 64K (0-3) or 128K (5-7) boundaries
- *  - transfer count loaded to registers is 1 less than actual count
- *  - controller 2 offsets are all even (2x offsets for controller 1)
- *  - page registers for 5-7 don't use data bit 0, represent 128K pages
- *  - page registers for 0-3 use bit 0, represent 64K pages
- *
- * On PReP, DMA transfers are limited to the lower 16MB of _physical_ memory.
- * On CHRP, the W83C553F (and VLSI Tollgate?) support full 32 bit addressing.
- * Note that addresses loaded into registers must be _physical_ addresses,
- * not logical addresses (which may differ if paging is active).
- *
- *  Address mapping for channels 0-3:
- *
- *   A23 ... A16 A15 ... A8  A7 ... A0    (Physical addresses)
- *    |  ...  |   |  ... |   |  ... |
- *    |  ...  |   |  ... |   |  ... |
- *    |  ...  |   |  ... |   |  ... |
- *   P7  ...  P0  A7 ... A0  A7 ... A0
- * |    Page    | Addr MSB | Addr LSB |   (DMA registers)
- *
- *  Address mapping for channels 5-7:
- *
- *   A23 ... A17 A16 A15 ... A9 A8 A7 ... A1 A0    (Physical addresses)
- *    |  ...  |   \   \   ... \  \  \  ... \  \
- *    |  ...  |    \   \   ... \  \  \  ... \  (not used)
- *    |  ...  |     \   \   ... \  \  \  ... \
- *   P7  ...  P1 (0) A7 A6  ... A0 A7 A6 ... A0
- * |      Page      |  Addr MSB   |  Addr LSB  |   (DMA registers)
- *
- * Again, channels 5-7 transfer _physical_ words (16 bits), so addresses
- * and counts _must_ be word-aligned (the lowest address bit is _ignored_ at
- * the hardware level, so odd-byte transfers aren't possible).
- *
- * Transfer count (_not # bytes_) is limited to 64K, represented as actual
- * count - 1 : 64K => 0xFFFF, 1 => 0x0000.  Thus, count is always 1 or more,
- * and up to 128K bytes may be transferred on channels 5-7 in one operation.
- *
- */
-
-/* see prep_setup_arch() for detailed informations */
-#if defined(CONFIG_SOUND_CS4232) && defined(CONFIG_PPC_PREP)
-extern long ppc_cs4232_dma, ppc_cs4232_dma2;
-#define SND_DMA1 ppc_cs4232_dma
-#define SND_DMA2 ppc_cs4232_dma2
-#else
-#define SND_DMA1 -1
-#define SND_DMA2 -1
-#endif
-
-/* 8237 DMA controllers */
-#define IO_DMA1_BASE	0x00	/* 8 bit slave DMA, channels 0..3 */
-#define IO_DMA2_BASE	0xC0	/* 16 bit master DMA, ch 4(=slave input)..7 */
-
-/* DMA controller registers */
-#define DMA1_CMD_REG		0x08	/* command register (w) */
-#define DMA1_STAT_REG		0x08	/* status register (r) */
-#define DMA1_REQ_REG		0x09	/* request register (w) */
-#define DMA1_MASK_REG		0x0A	/* single-channel mask (w) */
-#define DMA1_MODE_REG		0x0B	/* mode register (w) */
-#define DMA1_CLEAR_FF_REG	0x0C	/* clear pointer flip-flop (w) */
-#define DMA1_TEMP_REG		0x0D	/* Temporary Register (r) */
-#define DMA1_RESET_REG		0x0D	/* Master Clear (w) */
-#define DMA1_CLR_MASK_REG	0x0E	/* Clear Mask */
-#define DMA1_MASK_ALL_REG	0x0F	/* all-channels mask (w) */
-
-#define DMA2_CMD_REG		0xD0	/* command register (w) */
-#define DMA2_STAT_REG		0xD0	/* status register (r) */
-#define DMA2_REQ_REG		0xD2	/* request register (w) */
-#define DMA2_MASK_REG		0xD4	/* single-channel mask (w) */
-#define DMA2_MODE_REG		0xD6	/* mode register (w) */
-#define DMA2_CLEAR_FF_REG	0xD8	/* clear pointer flip-flop (w) */
-#define DMA2_TEMP_REG		0xDA	/* Temporary Register (r) */
-#define DMA2_RESET_REG		0xDA	/* Master Clear (w) */
-#define DMA2_CLR_MASK_REG	0xDC	/* Clear Mask */
-#define DMA2_MASK_ALL_REG	0xDE	/* all-channels mask (w) */
-
-#define DMA_ADDR_0		0x00	/* DMA address registers */
-#define DMA_ADDR_1		0x02
-#define DMA_ADDR_2		0x04
-#define DMA_ADDR_3		0x06
-#define DMA_ADDR_4		0xC0
-#define DMA_ADDR_5		0xC4
-#define DMA_ADDR_6		0xC8
-#define DMA_ADDR_7		0xCC
-
-#define DMA_CNT_0		0x01	/* DMA count registers */
-#define DMA_CNT_1		0x03
-#define DMA_CNT_2		0x05
-#define DMA_CNT_3		0x07
-#define DMA_CNT_4		0xC2
-#define DMA_CNT_5		0xC6
-#define DMA_CNT_6		0xCA
-#define DMA_CNT_7		0xCE
-
-#define DMA_LO_PAGE_0		0x87	/* DMA page registers */
-#define DMA_LO_PAGE_1		0x83
-#define DMA_LO_PAGE_2		0x81
-#define DMA_LO_PAGE_3		0x82
-#define DMA_LO_PAGE_5		0x8B
-#define DMA_LO_PAGE_6		0x89
-#define DMA_LO_PAGE_7		0x8A
-
-#define DMA_HI_PAGE_0		0x487	/* DMA page registers */
-#define DMA_HI_PAGE_1		0x483
-#define DMA_HI_PAGE_2		0x481
-#define DMA_HI_PAGE_3		0x482
-#define DMA_HI_PAGE_5		0x48B
-#define DMA_HI_PAGE_6		0x489
-#define DMA_HI_PAGE_7		0x48A
-
-#define DMA1_EXT_REG		0x40B
-#define DMA2_EXT_REG		0x4D6
-
-#define DMA_MODE_CASCADE	0xC0	/* pass thru DREQ->HRQ, DACK<-HLDA only */
-#define DMA_AUTOINIT		0x10
-
-extern spinlock_t dma_spin_lock;
-
-static __inline__ unsigned long claim_dma_lock(void)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&dma_spin_lock, flags);
-	return flags;
-}
-
-static __inline__ void release_dma_lock(unsigned long flags)
-{
-	spin_unlock_irqrestore(&dma_spin_lock, flags);
-}
-
-/* enable/disable a specific DMA channel */
-static __inline__ void enable_dma(unsigned int dmanr)
-{
-	unsigned char ucDmaCmd = 0x00;
-
-	if (dmanr != 4) {
-		dma_outb(0, DMA2_MASK_REG);	/* This may not be enabled */
-		dma_outb(ucDmaCmd, DMA2_CMD_REG);	/* Enable group */
-	}
-	if (dmanr <= 3) {
-		dma_outb(dmanr, DMA1_MASK_REG);
-		dma_outb(ucDmaCmd, DMA1_CMD_REG);	/* Enable group */
-	} else
-		dma_outb(dmanr & 3, DMA2_MASK_REG);
-}
-
-static __inline__ void disable_dma(unsigned int dmanr)
-{
-	if (dmanr <= 3)
-		dma_outb(dmanr | 4, DMA1_MASK_REG);
-	else
-		dma_outb((dmanr & 3) | 4, DMA2_MASK_REG);
-}
-
-/* Clear the 'DMA Pointer Flip Flop'.
- * Write 0 for LSB/MSB, 1 for MSB/LSB access.
- * Use this once to initialize the FF to a known state.
- * After that, keep track of it. :-)
- * --- In order to do that, the DMA routines below should ---
- * --- only be used while interrupts are disabled! ---
- */
-static __inline__ void clear_dma_ff(unsigned int dmanr)
-{
-	if (dmanr <= 3)
-		dma_outb(0, DMA1_CLEAR_FF_REG);
-	else
-		dma_outb(0, DMA2_CLEAR_FF_REG);
-}
-
-/* set mode (above) for a specific DMA channel */
-static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
-{
-	if (dmanr <= 3)
-		dma_outb(mode | dmanr, DMA1_MODE_REG);
-	else
-		dma_outb(mode | (dmanr & 3), DMA2_MODE_REG);
-}
-
-/* Set only the page register bits of the transfer address.
- * This is used for successive transfers when we know the contents of
- * the lower 16 bits of the DMA current address register, but a 64k boundary
- * may have been crossed.
- */
-static __inline__ void set_dma_page(unsigned int dmanr, int pagenr)
-{
-	switch (dmanr) {
-	case 0:
-		dma_outb(pagenr, DMA_LO_PAGE_0);
-		dma_outb(pagenr >> 8, DMA_HI_PAGE_0);
-		break;
-	case 1:
-		dma_outb(pagenr, DMA_LO_PAGE_1);
-		dma_outb(pagenr >> 8, DMA_HI_PAGE_1);
-		break;
-	case 2:
-		dma_outb(pagenr, DMA_LO_PAGE_2);
-		dma_outb(pagenr >> 8, DMA_HI_PAGE_2);
-		break;
-	case 3:
-		dma_outb(pagenr, DMA_LO_PAGE_3);
-		dma_outb(pagenr >> 8, DMA_HI_PAGE_3);
-		break;
-	case 5:
-		if (SND_DMA1 == 5 || SND_DMA2 == 5)
-			dma_outb(pagenr, DMA_LO_PAGE_5);
-		else
-			dma_outb(pagenr & 0xfe, DMA_LO_PAGE_5);
-		dma_outb(pagenr >> 8, DMA_HI_PAGE_5);
-		break;
-	case 6:
-		if (SND_DMA1 == 6 || SND_DMA2 == 6)
-			dma_outb(pagenr, DMA_LO_PAGE_6);
-		else
-			dma_outb(pagenr & 0xfe, DMA_LO_PAGE_6);
-		dma_outb(pagenr >> 8, DMA_HI_PAGE_6);
-		break;
-	case 7:
-		if (SND_DMA1 == 7 || SND_DMA2 == 7)
-			dma_outb(pagenr, DMA_LO_PAGE_7);
-		else
-			dma_outb(pagenr & 0xfe, DMA_LO_PAGE_7);
-		dma_outb(pagenr >> 8, DMA_HI_PAGE_7);
-		break;
-	}
-}
-
-/* Set transfer address & page bits for specific DMA channel.
- * Assumes dma flipflop is clear.
- */
-static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int phys)
-{
-	if (dmanr <= 3) {
-		dma_outb(phys & 0xff, ((dmanr & 3) << 1) + IO_DMA1_BASE);
-		dma_outb((phys >> 8) & 0xff, ((dmanr & 3) << 1) + IO_DMA1_BASE);
-	} else if (dmanr == SND_DMA1 || dmanr == SND_DMA2) {
-		dma_outb(phys & 0xff, ((dmanr & 3) << 2) + IO_DMA2_BASE);
-		dma_outb((phys >> 8) & 0xff, ((dmanr & 3) << 2) + IO_DMA2_BASE);
-		dma_outb((dmanr & 3), DMA2_EXT_REG);
-	} else {
-		dma_outb((phys >> 1) & 0xff, ((dmanr & 3) << 2) + IO_DMA2_BASE);
-		dma_outb((phys >> 9) & 0xff, ((dmanr & 3) << 2) + IO_DMA2_BASE);
-	}
-	set_dma_page(dmanr, phys >> 16);
-}
-
-/* Set transfer size (max 64k for DMA1..3, 128k for DMA5..7) for
- * a specific DMA channel.
- * You must ensure the parameters are valid.
- * NOTE: from a manual: "the number of transfers is one more
- * than the initial word count"! This is taken into account.
- * Assumes dma flip-flop is clear.
- * NOTE 2: "count" represents _bytes_ and must be even for channels 5-7.
- */
-static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
-{
-	count--;
-	if (dmanr <= 3) {
-		dma_outb(count & 0xff, ((dmanr & 3) << 1) + 1 + IO_DMA1_BASE);
-		dma_outb((count >> 8) & 0xff, ((dmanr & 3) << 1) + 1 +
-			 IO_DMA1_BASE);
-	} else if (dmanr == SND_DMA1 || dmanr == SND_DMA2) {
-		dma_outb(count & 0xff, ((dmanr & 3) << 2) + 2 + IO_DMA2_BASE);
-		dma_outb((count >> 8) & 0xff, ((dmanr & 3) << 2) + 2 +
-			 IO_DMA2_BASE);
-	} else {
-		dma_outb((count >> 1) & 0xff, ((dmanr & 3) << 2) + 2 +
-			 IO_DMA2_BASE);
-		dma_outb((count >> 9) & 0xff, ((dmanr & 3) << 2) + 2 +
-			 IO_DMA2_BASE);
-	}
-}
-
-/* Get DMA residue count. After a DMA transfer, this
- * should return zero. Reading this while a DMA transfer is
- * still in progress will return unpredictable results.
- * If called before the channel has been used, it may return 1.
- * Otherwise, it returns the number of _bytes_ left to transfer.
- *
- * Assumes DMA flip-flop is clear.
- */
-static __inline__ int get_dma_residue(unsigned int dmanr)
-{
-	unsigned int io_port = (dmanr <= 3) ?
-	    ((dmanr & 3) << 1) + 1 + IO_DMA1_BASE
-	    : ((dmanr & 3) << 2) + 2 + IO_DMA2_BASE;
-
-	/* using short to get 16-bit wrap around */
-	unsigned short count;
-
-	count = 1 + dma_inb(io_port);
-	count += dma_inb(io_port) << 8;
-
-	return (dmanr <= 3 || dmanr == SND_DMA1 || dmanr == SND_DMA2)
-	    ? count : (count << 1);
-
-}
-
-/* These are in kernel/dma.c: */
-
-/* reserve a DMA channel */
-extern int request_dma(unsigned int dmanr, const char *device_id);
-/* release it again */
-extern void free_dma(unsigned int dmanr);
-
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy	(0)
-#endif
-#endif				/* _ASM_DMA_H */
-#endif				/* __KERNEL__ */
diff --git a/include/asm-ppc64/dma.h b/include/asm-ppc64/dma.h
deleted file mode 100644
--- a/include/asm-ppc64/dma.h
+++ /dev/null
@@ -1,329 +0,0 @@
-/* 
- * linux/include/asm/dma.h: Defines for using and allocating dma channels.
- * Written by Hennus Bergman, 1992.
- * High DMA channel support & info by Hannu Savolainen
- * and John Boyd, Nov. 1992.
- * Changes for ppc sound by Christoph Nadig
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _ASM_DMA_H
-#define _ASM_DMA_H
-
-#include <linux/config.h>
-#include <asm/io.h>
-#include <linux/spinlock.h>
-#include <asm/system.h>
-
-#ifndef MAX_DMA_CHANNELS
-#define MAX_DMA_CHANNELS	8
-#endif
-
-/* The maximum address that we can perform a DMA transfer to on this platform */
-/* Doesn't really apply... */
-#define MAX_DMA_ADDRESS  (~0UL)
-
-#if !defined(CONFIG_PPC_ISERIES) || defined(CONFIG_PCI)
-
-#define dma_outb	outb
-#define dma_inb		inb
-
-/*
- * NOTES about DMA transfers:
- *
- *  controller 1: channels 0-3, byte operations, ports 00-1F
- *  controller 2: channels 4-7, word operations, ports C0-DF
- *
- *  - ALL registers are 8 bits only, regardless of transfer size
- *  - channel 4 is not used - cascades 1 into 2.
- *  - channels 0-3 are byte - addresses/counts are for physical bytes
- *  - channels 5-7 are word - addresses/counts are for physical words
- *  - transfers must not cross physical 64K (0-3) or 128K (5-7) boundaries
- *  - transfer count loaded to registers is 1 less than actual count
- *  - controller 2 offsets are all even (2x offsets for controller 1)
- *  - page registers for 5-7 don't use data bit 0, represent 128K pages
- *  - page registers for 0-3 use bit 0, represent 64K pages
- *
- * On PReP, DMA transfers are limited to the lower 16MB of _physical_ memory.  
- * On CHRP, the W83C553F (and VLSI Tollgate?) support full 32 bit addressing.
- * Note that addresses loaded into registers must be _physical_ addresses,
- * not logical addresses (which may differ if paging is active).
- *
- *  Address mapping for channels 0-3:
- *
- *   A23 ... A16 A15 ... A8  A7 ... A0    (Physical addresses)
- *    |  ...  |   |  ... |   |  ... |
- *    |  ...  |   |  ... |   |  ... |
- *    |  ...  |   |  ... |   |  ... |
- *   P7  ...  P0  A7 ... A0  A7 ... A0   
- * |    Page    | Addr MSB | Addr LSB |   (DMA registers)
- *
- *  Address mapping for channels 5-7:
- *
- *   A23 ... A17 A16 A15 ... A9 A8 A7 ... A1 A0    (Physical addresses)
- *    |  ...  |   \   \   ... \  \  \  ... \  \
- *    |  ...  |    \   \   ... \  \  \  ... \  (not used)
- *    |  ...  |     \   \   ... \  \  \  ... \
- *   P7  ...  P1 (0) A7 A6  ... A0 A7 A6 ... A0   
- * |      Page      |  Addr MSB   |  Addr LSB  |   (DMA registers)
- *
- * Again, channels 5-7 transfer _physical_ words (16 bits), so addresses
- * and counts _must_ be word-aligned (the lowest address bit is _ignored_ at
- * the hardware level, so odd-byte transfers aren't possible).
- *
- * Transfer count (_not # bytes_) is limited to 64K, represented as actual
- * count - 1 : 64K => 0xFFFF, 1 => 0x0000.  Thus, count is always 1 or more,
- * and up to 128K bytes may be transferred on channels 5-7 in one operation. 
- *
- */
-
-/* 8237 DMA controllers */
-#define IO_DMA1_BASE	0x00	/* 8 bit slave DMA, channels 0..3 */
-#define IO_DMA2_BASE	0xC0	/* 16 bit master DMA, ch 4(=slave input)..7 */
-
-/* DMA controller registers */
-#define DMA1_CMD_REG		0x08	/* command register (w) */
-#define DMA1_STAT_REG		0x08	/* status register (r) */
-#define DMA1_REQ_REG            0x09    /* request register (w) */
-#define DMA1_MASK_REG		0x0A	/* single-channel mask (w) */
-#define DMA1_MODE_REG		0x0B	/* mode register (w) */
-#define DMA1_CLEAR_FF_REG	0x0C	/* clear pointer flip-flop (w) */
-#define DMA1_TEMP_REG           0x0D    /* Temporary Register (r) */
-#define DMA1_RESET_REG		0x0D	/* Master Clear (w) */
-#define DMA1_CLR_MASK_REG       0x0E    /* Clear Mask */
-#define DMA1_MASK_ALL_REG       0x0F    /* all-channels mask (w) */
-
-#define DMA2_CMD_REG		0xD0	/* command register (w) */
-#define DMA2_STAT_REG		0xD0	/* status register (r) */
-#define DMA2_REQ_REG            0xD2    /* request register (w) */
-#define DMA2_MASK_REG		0xD4	/* single-channel mask (w) */
-#define DMA2_MODE_REG		0xD6	/* mode register (w) */
-#define DMA2_CLEAR_FF_REG	0xD8	/* clear pointer flip-flop (w) */
-#define DMA2_TEMP_REG           0xDA    /* Temporary Register (r) */
-#define DMA2_RESET_REG		0xDA	/* Master Clear (w) */
-#define DMA2_CLR_MASK_REG       0xDC    /* Clear Mask */
-#define DMA2_MASK_ALL_REG       0xDE    /* all-channels mask (w) */
-
-#define DMA_ADDR_0              0x00    /* DMA address registers */
-#define DMA_ADDR_1              0x02
-#define DMA_ADDR_2              0x04
-#define DMA_ADDR_3              0x06
-#define DMA_ADDR_4              0xC0
-#define DMA_ADDR_5              0xC4
-#define DMA_ADDR_6              0xC8
-#define DMA_ADDR_7              0xCC
-
-#define DMA_CNT_0               0x01    /* DMA count registers */
-#define DMA_CNT_1               0x03
-#define DMA_CNT_2               0x05
-#define DMA_CNT_3               0x07
-#define DMA_CNT_4               0xC2
-#define DMA_CNT_5               0xC6
-#define DMA_CNT_6               0xCA
-#define DMA_CNT_7               0xCE
-
-#define DMA_LO_PAGE_0              0x87    /* DMA page registers */
-#define DMA_LO_PAGE_1              0x83
-#define DMA_LO_PAGE_2              0x81
-#define DMA_LO_PAGE_3              0x82
-#define DMA_LO_PAGE_5              0x8B
-#define DMA_LO_PAGE_6              0x89
-#define DMA_LO_PAGE_7              0x8A
-
-#define DMA_HI_PAGE_0              0x487    /* DMA page registers */
-#define DMA_HI_PAGE_1              0x483
-#define DMA_HI_PAGE_2              0x481
-#define DMA_HI_PAGE_3              0x482
-#define DMA_HI_PAGE_5              0x48B
-#define DMA_HI_PAGE_6              0x489
-#define DMA_HI_PAGE_7              0x48A
-
-#define DMA1_EXT_REG               0x40B
-#define DMA2_EXT_REG               0x4D6
-
-#define DMA_MODE_READ	0x44	/* I/O to memory, no autoinit, increment, single mode */
-#define DMA_MODE_WRITE	0x48	/* memory to I/O, no autoinit, increment, single mode */
-#define DMA_MODE_CASCADE 0xC0   /* pass thru DREQ->HRQ, DACK<-HLDA only */
-
-#define DMA_AUTOINIT   	 0x10
-
-extern spinlock_t  dma_spin_lock;
-
-static __inline__ unsigned long claim_dma_lock(void)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&dma_spin_lock, flags);
-	return flags;
-}
-
-static __inline__ void release_dma_lock(unsigned long flags)
-{
-	spin_unlock_irqrestore(&dma_spin_lock, flags);
-}
-
-/* enable/disable a specific DMA channel */
-static __inline__ void enable_dma(unsigned int dmanr)
-{
-	unsigned char ucDmaCmd=0x00;
-
-	if (dmanr != 4)
-	{
-		dma_outb(0, DMA2_MASK_REG);  /* This may not be enabled */
-		dma_outb(ucDmaCmd, DMA2_CMD_REG);  /* Enable group */
-	}
-	if (dmanr<=3)
-	{
-		dma_outb(dmanr,  DMA1_MASK_REG);
-		dma_outb(ucDmaCmd, DMA1_CMD_REG);  /* Enable group */
-	} else
-	{
-		dma_outb(dmanr & 3,  DMA2_MASK_REG);
-	}
-}
-
-static __inline__ void disable_dma(unsigned int dmanr)
-{
-	if (dmanr<=3)
-		dma_outb(dmanr | 4,  DMA1_MASK_REG);
-	else
-		dma_outb((dmanr & 3) | 4,  DMA2_MASK_REG);
-}
-
-/* Clear the 'DMA Pointer Flip Flop'.
- * Write 0 for LSB/MSB, 1 for MSB/LSB access.
- * Use this once to initialize the FF to a known state.
- * After that, keep track of it. :-)
- * --- In order to do that, the DMA routines below should ---
- * --- only be used while interrupts are disabled! ---
- */
-static __inline__ void clear_dma_ff(unsigned int dmanr)
-{
-	if (dmanr<=3)
-		dma_outb(0,  DMA1_CLEAR_FF_REG);
-	else
-		dma_outb(0,  DMA2_CLEAR_FF_REG);
-}
-
-/* set mode (above) for a specific DMA channel */
-static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
-{
-	if (dmanr<=3)
-		dma_outb(mode | dmanr,  DMA1_MODE_REG);
-	else
-		dma_outb(mode | (dmanr&3),  DMA2_MODE_REG);
-}
-
-/* Set only the page register bits of the transfer address.
- * This is used for successive transfers when we know the contents of
- * the lower 16 bits of the DMA current address register, but a 64k boundary
- * may have been crossed.
- */
-static __inline__ void set_dma_page(unsigned int dmanr, int pagenr)
-{
-	switch(dmanr) {
-		case 0:
-			dma_outb(pagenr, DMA_LO_PAGE_0);
-                        dma_outb(pagenr>>8, DMA_HI_PAGE_0);
-			break;
-		case 1:
-			dma_outb(pagenr, DMA_LO_PAGE_1);
-                        dma_outb(pagenr>>8, DMA_HI_PAGE_1);
-			break;
-		case 2:
-			dma_outb(pagenr, DMA_LO_PAGE_2);
-			dma_outb(pagenr>>8, DMA_HI_PAGE_2); 
-			break;
-		case 3:
-			dma_outb(pagenr, DMA_LO_PAGE_3);
-			dma_outb(pagenr>>8, DMA_HI_PAGE_3); 
-			break;
-	        case 5:
-		        dma_outb(pagenr & 0xfe, DMA_LO_PAGE_5);
-                        dma_outb(pagenr>>8, DMA_HI_PAGE_5);
-			break;
-		case 6:
-		        dma_outb(pagenr & 0xfe, DMA_LO_PAGE_6);
-			dma_outb(pagenr>>8, DMA_HI_PAGE_6);
-			break;
-		case 7:
-		        dma_outb(pagenr & 0xfe, DMA_LO_PAGE_7);
-			dma_outb(pagenr>>8, DMA_HI_PAGE_7);
-		  break;
-	}
-}
-
-
-/* Set transfer address & page bits for specific DMA channel.
- * Assumes dma flipflop is clear.
- */
-static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int phys)
-{
-	if (dmanr <= 3)  {
-	    dma_outb( phys & 0xff, ((dmanr&3)<<1) + IO_DMA1_BASE );
-            dma_outb( (phys>>8) & 0xff, ((dmanr&3)<<1) + IO_DMA1_BASE );
-	}  else  {
-	    dma_outb( (phys>>1) & 0xff, ((dmanr&3)<<2) + IO_DMA2_BASE );
-	    dma_outb( (phys>>9) & 0xff, ((dmanr&3)<<2) + IO_DMA2_BASE );
-	}
-	set_dma_page(dmanr, phys>>16);
-}
-
-
-/* Set transfer size (max 64k for DMA1..3, 128k for DMA5..7) for
- * a specific DMA channel.
- * You must ensure the parameters are valid.
- * NOTE: from a manual: "the number of transfers is one more
- * than the initial word count"! This is taken into account.
- * Assumes dma flip-flop is clear.
- * NOTE 2: "count" represents _bytes_ and must be even for channels 5-7.
- */
-static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
-{
-        count--;
-	if (dmanr <= 3)  {
-	    dma_outb( count & 0xff, ((dmanr&3)<<1) + 1 + IO_DMA1_BASE );
-	    dma_outb( (count>>8) & 0xff, ((dmanr&3)<<1) + 1 + IO_DMA1_BASE );
-        } else {
-	    dma_outb( (count>>1) & 0xff, ((dmanr&3)<<2) + 2 + IO_DMA2_BASE );
-	    dma_outb( (count>>9) & 0xff, ((dmanr&3)<<2) + 2 + IO_DMA2_BASE );
-        }
-}
-
-
-/* Get DMA residue count. After a DMA transfer, this
- * should return zero. Reading this while a DMA transfer is
- * still in progress will return unpredictable results.
- * If called before the channel has been used, it may return 1.
- * Otherwise, it returns the number of _bytes_ left to transfer.
- *
- * Assumes DMA flip-flop is clear.
- */
-static __inline__ int get_dma_residue(unsigned int dmanr)
-{
-	unsigned int io_port = (dmanr<=3)? ((dmanr&3)<<1) + 1 + IO_DMA1_BASE
-					 : ((dmanr&3)<<2) + 2 + IO_DMA2_BASE;
-
-	/* using short to get 16-bit wrap around */
-	unsigned short count;
-
-	count = 1 + dma_inb(io_port);
-	count += dma_inb(io_port) << 8;
-	
-	return (dmanr <= 3)? count : (count<<1);
-}
-
-/* These are in kernel/dma.c: */
-extern int request_dma(unsigned int dmanr, const char * device_id);	/* reserve a DMA channel */
-extern void free_dma(unsigned int dmanr);	/* release it again */
-
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;                                        
-#else                                                         
-#define isa_dma_bridge_buggy   (0)
-#endif
-#endif	/* !defined(CONFIG_PPC_ISERIES) || defined(CONFIG_PCI) */
-#endif /* _ASM_DMA_H */