[PATCH] powerpc: Merge asm-ppc*/dma.h

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

Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 371 deletions

diff --git a/include/asm-ppc/dma.h b/include/asm-ppc/dma.h
deleted file mode 100644
index cc8e5cd..0000000
--- 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__ */