author | Florian Westphal <fw@strlen.de> |
Sun, 11 Jan 2009 20:20:11 +0100 | |
changeset 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* linux/include/asm/dma.h: Defines for using and allocating dma channels. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Written by Hennus Bergman, 1992. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* High DMA channel support & info by Hannu Savolainen |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* and John Boyd, Nov. 1992. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifndef _ASM_X86_DMA_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define _ASM_X86_DMA_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/spinlock.h> /* And spinlocks */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <asm/io.h> /* need byte IO */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/delay.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#ifdef HAVE_REALLY_SLOW_DMA_CONTROLLER |
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#define dma_outb outb_p |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#else |
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#define dma_outb outb |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#endif |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#define dma_inb inb |
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|
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/* |
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* NOTES about DMA transfers: |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* controller 1: channels 0-3, byte operations, ports 00-1F |
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* controller 2: channels 4-7, word operations, ports C0-DF |
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* |
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* - ALL registers are 8 bits only, regardless of transfer size |
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* - channel 4 is not used - cascades 1 into 2. |
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* - channels 0-3 are byte - addresses/counts are for physical bytes |
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* - channels 5-7 are word - addresses/counts are for physical words |
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* - transfers must not cross physical 64K (0-3) or 128K (5-7) boundaries |
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* - transfer count loaded to registers is 1 less than actual count |
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* - controller 2 offsets are all even (2x offsets for controller 1) |
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* - page registers for 5-7 don't use data bit 0, represent 128K pages |
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* - page registers for 0-3 use bit 0, represent 64K pages |
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* |
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* DMA transfers are limited to the lower 16MB of _physical_ memory. |
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* Note that addresses loaded into registers must be _physical_ addresses, |
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* not logical addresses (which may differ if paging is active). |
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* |
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* Address mapping for channels 0-3: |
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* |
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* A23 ... A16 A15 ... A8 A7 ... A0 (Physical addresses) |
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* | ... | | ... | | ... | |
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* | ... | | ... | | ... | |
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* | ... | | ... | | ... | |
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* P7 ... P0 A7 ... A0 A7 ... A0 |
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* | Page | Addr MSB | Addr LSB | (DMA registers) |
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* |
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* Address mapping for channels 5-7: |
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* |
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* A23 ... A17 A16 A15 ... A9 A8 A7 ... A1 A0 (Physical addresses) |
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* | ... | \ \ ... \ \ \ ... \ \ |
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* | ... | \ \ ... \ \ \ ... \ (not used) |
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* | ... | \ \ ... \ \ \ ... \ |
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* P7 ... P1 (0) A7 A6 ... A0 A7 A6 ... A0 |
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* | Page | Addr MSB | Addr LSB | (DMA registers) |
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* |
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* Again, channels 5-7 transfer _physical_ words (16 bits), so addresses |
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* and counts _must_ be word-aligned (the lowest address bit is _ignored_ at |
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* the hardware level, so odd-byte transfers aren't possible). |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* Transfer count (_not # bytes_) is limited to 64K, represented as actual |
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* count - 1 : 64K => 0xFFFF, 1 => 0x0000. Thus, count is always 1 or more, |
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* and up to 128K bytes may be transferred on channels 5-7 in one operation. |
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* |
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*/ |
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|
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#define MAX_DMA_CHANNELS 8 |
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|
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#ifdef CONFIG_X86_32 |
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|
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/* The maximum address that we can perform a DMA transfer to on this platform */ |
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#define MAX_DMA_ADDRESS (PAGE_OFFSET + 0x1000000) |
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|
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#else |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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/* 16MB ISA DMA zone */ |
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#define MAX_DMA_PFN ((16 * 1024 * 1024) >> PAGE_SHIFT) |
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|
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/* 4GB broken PCI/AGP hardware bus master zone */ |
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#define MAX_DMA32_PFN ((4UL * 1024 * 1024 * 1024) >> PAGE_SHIFT) |
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|
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/* Compat define for old dma zone */ |
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#define MAX_DMA_ADDRESS ((unsigned long)__va(MAX_DMA_PFN << PAGE_SHIFT)) |
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|
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#endif |
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|
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/* 8237 DMA controllers */ |
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#define IO_DMA1_BASE 0x00 /* 8 bit slave DMA, channels 0..3 */ |
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#define IO_DMA2_BASE 0xC0 /* 16 bit master DMA, ch 4(=slave input)..7 */ |
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|
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/* DMA controller registers */ |
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#define DMA1_CMD_REG 0x08 /* command register (w) */ |
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#define DMA1_STAT_REG 0x08 /* status register (r) */ |
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#define DMA1_REQ_REG 0x09 /* request register (w) */ |
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#define DMA1_MASK_REG 0x0A /* single-channel mask (w) */ |
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#define DMA1_MODE_REG 0x0B /* mode register (w) */ |
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#define DMA1_CLEAR_FF_REG 0x0C /* clear pointer flip-flop (w) */ |
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#define DMA1_TEMP_REG 0x0D /* Temporary Register (r) */ |
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#define DMA1_RESET_REG 0x0D /* Master Clear (w) */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define DMA1_CLR_MASK_REG 0x0E /* Clear Mask */ |
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#define DMA1_MASK_ALL_REG 0x0F /* all-channels mask (w) */ |
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#define DMA2_CMD_REG 0xD0 /* command register (w) */ |
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#define DMA2_STAT_REG 0xD0 /* status register (r) */ |
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#define DMA2_REQ_REG 0xD2 /* request register (w) */ |
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changeset
|
110 |
#define DMA2_MASK_REG 0xD4 /* single-channel mask (w) */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
111 |
#define DMA2_MODE_REG 0xD6 /* mode register (w) */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
112 |
#define DMA2_CLEAR_FF_REG 0xD8 /* clear pointer flip-flop (w) */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
113 |
#define DMA2_TEMP_REG 0xDA /* Temporary Register (r) */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
114 |
#define DMA2_RESET_REG 0xDA /* Master Clear (w) */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
115 |
#define DMA2_CLR_MASK_REG 0xDC /* Clear Mask */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
116 |
#define DMA2_MASK_ALL_REG 0xDE /* all-channels mask (w) */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
117 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
118 |
#define DMA_ADDR_0 0x00 /* DMA address registers */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
119 |
#define DMA_ADDR_1 0x02 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
120 |
#define DMA_ADDR_2 0x04 |
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|
121 |
#define DMA_ADDR_3 0x06 |
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|
122 |
#define DMA_ADDR_4 0xC0 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
123 |
#define DMA_ADDR_5 0xC4 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
124 |
#define DMA_ADDR_6 0xC8 |
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|
125 |
#define DMA_ADDR_7 0xCC |
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|
126 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
127 |
#define DMA_CNT_0 0x01 /* DMA count registers */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
128 |
#define DMA_CNT_1 0x03 |
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|
129 |
#define DMA_CNT_2 0x05 |
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|
130 |
#define DMA_CNT_3 0x07 |
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|
131 |
#define DMA_CNT_4 0xC2 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
132 |
#define DMA_CNT_5 0xC6 |
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|
133 |
#define DMA_CNT_6 0xCA |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
134 |
#define DMA_CNT_7 0xCE |
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|
135 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
136 |
#define DMA_PAGE_0 0x87 /* DMA page registers */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
137 |
#define DMA_PAGE_1 0x83 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
138 |
#define DMA_PAGE_2 0x81 |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
139 |
#define DMA_PAGE_3 0x82 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
140 |
#define DMA_PAGE_5 0x8B |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
141 |
#define DMA_PAGE_6 0x89 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
142 |
#define DMA_PAGE_7 0x8A |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
143 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
144 |
/* I/O to memory, no autoinit, increment, single mode */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
145 |
#define DMA_MODE_READ 0x44 |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
146 |
/* memory to I/O, no autoinit, increment, single mode */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
147 |
#define DMA_MODE_WRITE 0x48 |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
148 |
/* pass thru DREQ->HRQ, DACK<-HLDA only */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
149 |
#define DMA_MODE_CASCADE 0xC0 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
150 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
151 |
#define DMA_AUTOINIT 0x10 |
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|
152 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
153 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
154 |
extern spinlock_t dma_spin_lock; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
155 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
156 |
static inline unsigned long claim_dma_lock(void) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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|
157 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
158 |
unsigned long flags; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
159 |
spin_lock_irqsave(&dma_spin_lock, flags); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
160 |
return flags; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
161 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
162 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
163 |
static inline void release_dma_lock(unsigned long flags) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
164 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
165 |
spin_unlock_irqrestore(&dma_spin_lock, flags); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
166 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
167 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
168 |
/* enable/disable a specific DMA channel */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
169 |
static inline void enable_dma(unsigned int dmanr) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
170 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
171 |
if (dmanr <= 3) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
172 |
dma_outb(dmanr, DMA1_MASK_REG); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
173 |
else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
174 |
dma_outb(dmanr & 3, DMA2_MASK_REG); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
175 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
176 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
177 |
static inline void disable_dma(unsigned int dmanr) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
178 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
179 |
if (dmanr <= 3) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
180 |
dma_outb(dmanr | 4, DMA1_MASK_REG); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
181 |
else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
182 |
dma_outb((dmanr & 3) | 4, DMA2_MASK_REG); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
183 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
184 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
185 |
/* Clear the 'DMA Pointer Flip Flop'. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
186 |
* Write 0 for LSB/MSB, 1 for MSB/LSB access. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
187 |
* Use this once to initialize the FF to a known state. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
188 |
* After that, keep track of it. :-) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
189 |
* --- In order to do that, the DMA routines below should --- |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
190 |
* --- only be used while holding the DMA lock ! --- |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
191 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
192 |
static inline void clear_dma_ff(unsigned int dmanr) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
193 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
194 |
if (dmanr <= 3) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
195 |
dma_outb(0, DMA1_CLEAR_FF_REG); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
196 |
else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
197 |
dma_outb(0, DMA2_CLEAR_FF_REG); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
198 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
199 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
200 |
/* set mode (above) for a specific DMA channel */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
201 |
static inline void set_dma_mode(unsigned int dmanr, char mode) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
202 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
203 |
if (dmanr <= 3) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
204 |
dma_outb(mode | dmanr, DMA1_MODE_REG); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
205 |
else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
206 |
dma_outb(mode | (dmanr & 3), DMA2_MODE_REG); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
207 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
208 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
209 |
/* Set only the page register bits of the transfer address. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
210 |
* This is used for successive transfers when we know the contents of |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
211 |
* the lower 16 bits of the DMA current address register, but a 64k boundary |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
212 |
* may have been crossed. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
213 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
214 |
static inline void set_dma_page(unsigned int dmanr, char pagenr) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
215 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
216 |
switch (dmanr) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
217 |
case 0: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
218 |
dma_outb(pagenr, DMA_PAGE_0); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
219 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
220 |
case 1: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
221 |
dma_outb(pagenr, DMA_PAGE_1); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
222 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
223 |
case 2: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
224 |
dma_outb(pagenr, DMA_PAGE_2); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
225 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
226 |
case 3: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
227 |
dma_outb(pagenr, DMA_PAGE_3); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
228 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
229 |
case 5: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
230 |
dma_outb(pagenr & 0xfe, DMA_PAGE_5); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
231 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
232 |
case 6: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
233 |
dma_outb(pagenr & 0xfe, DMA_PAGE_6); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
234 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
235 |
case 7: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
236 |
dma_outb(pagenr & 0xfe, DMA_PAGE_7); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
237 |
break; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
238 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
239 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
240 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
241 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
242 |
/* Set transfer address & page bits for specific DMA channel. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
243 |
* Assumes dma flipflop is clear. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
244 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
245 |
static inline void set_dma_addr(unsigned int dmanr, unsigned int a) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
246 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
247 |
set_dma_page(dmanr, a>>16); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
248 |
if (dmanr <= 3) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
249 |
dma_outb(a & 0xff, ((dmanr & 3) << 1) + IO_DMA1_BASE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
250 |
dma_outb((a >> 8) & 0xff, ((dmanr & 3) << 1) + IO_DMA1_BASE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
251 |
} else { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
252 |
dma_outb((a >> 1) & 0xff, ((dmanr & 3) << 2) + IO_DMA2_BASE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
253 |
dma_outb((a >> 9) & 0xff, ((dmanr & 3) << 2) + IO_DMA2_BASE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
254 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
255 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
256 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
257 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
258 |
/* Set transfer size (max 64k for DMA0..3, 128k for DMA5..7) for |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
259 |
* a specific DMA channel. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
260 |
* You must ensure the parameters are valid. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
261 |
* NOTE: from a manual: "the number of transfers is one more |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
262 |
* than the initial word count"! This is taken into account. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
263 |
* Assumes dma flip-flop is clear. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
264 |
* NOTE 2: "count" represents _bytes_ and must be even for channels 5-7. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
265 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
266 |
static inline void set_dma_count(unsigned int dmanr, unsigned int count) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
267 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
268 |
count--; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
269 |
if (dmanr <= 3) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
270 |
dma_outb(count & 0xff, ((dmanr & 3) << 1) + 1 + IO_DMA1_BASE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
271 |
dma_outb((count >> 8) & 0xff, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
272 |
((dmanr & 3) << 1) + 1 + IO_DMA1_BASE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
273 |
} else { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
274 |
dma_outb((count >> 1) & 0xff, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
275 |
((dmanr & 3) << 2) + 2 + IO_DMA2_BASE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
276 |
dma_outb((count >> 9) & 0xff, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
277 |
((dmanr & 3) << 2) + 2 + IO_DMA2_BASE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
278 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
279 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
280 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
281 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
282 |
/* Get DMA residue count. After a DMA transfer, this |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
283 |
* should return zero. Reading this while a DMA transfer is |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
284 |
* still in progress will return unpredictable results. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
285 |
* If called before the channel has been used, it may return 1. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
286 |
* Otherwise, it returns the number of _bytes_ left to transfer. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
287 |
* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
288 |
* Assumes DMA flip-flop is clear. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
289 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
290 |
static inline int get_dma_residue(unsigned int dmanr) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
291 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
292 |
unsigned int io_port; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
293 |
/* using short to get 16-bit wrap around */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
294 |
unsigned short count; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
295 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
296 |
io_port = (dmanr <= 3) ? ((dmanr & 3) << 1) + 1 + IO_DMA1_BASE |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
297 |
: ((dmanr & 3) << 2) + 2 + IO_DMA2_BASE; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
298 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
299 |
count = 1 + dma_inb(io_port); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
300 |
count += dma_inb(io_port) << 8; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
301 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
302 |
return (dmanr <= 3) ? count : (count << 1); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
303 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
304 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
305 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
306 |
/* These are in kernel/dma.c: */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
307 |
extern int request_dma(unsigned int dmanr, const char *device_id); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
308 |
extern void free_dma(unsigned int dmanr); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
309 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
310 |
/* From PCI */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
311 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
312 |
#ifdef CONFIG_PCI |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
313 |
extern int isa_dma_bridge_buggy; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
314 |
#else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
315 |
#define isa_dma_bridge_buggy (0) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
316 |
#endif |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
317 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
318 |
#endif /* _ASM_X86_DMA_H */ |