+#ifndef _ASM_POWERPC_DMA_H
+#define _ASM_POWERPC_DMA_H
+
/*
- * include/asm-ppc/dma.h: Defines for using and allocating dma channels.
+ * 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>
* with a grain of salt.
*/
-#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
/* The maximum address that we can perform a DMA transfer to on this platform */
/* Doesn't really apply... */
-#define MAX_DMA_ADDRESS 0xFFFFFFFF
+#define MAX_DMA_ADDRESS (~0UL)
-/* in arch/ppc/kernel/setup.c -- Cort */
-extern unsigned long DMA_MODE_WRITE, DMA_MODE_READ;
-extern unsigned long ISA_DMA_THRESHOLD;
+#if !defined(CONFIG_PPC_ISERIES) || defined(CONFIG_PCI)
#ifdef HAVE_REALLY_SLOW_DMA_CONTROLLER
#define dma_outb outb_p
#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;
if (dmanr <= 3) {
dma_outb(dmanr, DMA1_MASK_REG);
dma_outb(ucDmaCmd, DMA1_CMD_REG); /* Enable group */
- } else
+ } else {
dma_outb(dmanr & 3, DMA2_MASK_REG);
+ }
}
static __inline__ void disable_dma(unsigned int dmanr)
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);
+ 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(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);
+ 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.
{
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);
+ 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);
+ 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);
+ 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.
*/
static __inline__ int get_dma_residue(unsigned int dmanr)
{
- unsigned int io_port = (dmanr <= 3) ?
- ((dmanr & 3) << 1) + 1 + IO_DMA1_BASE
+ 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 */
return (dmanr <= 3 || dmanr == SND_DMA1 || dmanr == SND_DMA2)
? count : (count << 1);
-
}
/* These are in kernel/dma.c: */
#else
#define isa_dma_bridge_buggy (0)
#endif
-#endif /* _ASM_DMA_H */
-#endif /* __KERNEL__ */
+
+#endif /* !defined(CONFIG_PPC_ISERIES) || defined(CONFIG_PCI) */
+
+#endif /* _ASM_POWERPC_DMA_H */
+++ /dev/null
-/*
- * 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 */
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