diff options
Diffstat (limited to 'arch/sh/drivers/dma/dma-isa.c')
| -rw-r--r-- | arch/sh/drivers/dma/dma-isa.c | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/arch/sh/drivers/dma/dma-isa.c b/arch/sh/drivers/dma/dma-isa.c deleted file mode 100644 index 5fb044b791c3..000000000000 --- a/arch/sh/drivers/dma/dma-isa.c +++ /dev/null | |||
| @@ -1,106 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * arch/sh/drivers/dma/dma-isa.c | ||
| 3 | * | ||
| 4 | * Generic ISA DMA wrapper for SH DMA API | ||
| 5 | * | ||
| 6 | * Copyright (C) 2003, 2004 Paul Mundt | ||
| 7 | * | ||
| 8 | * This file is subject to the terms and conditions of the GNU General Public | ||
| 9 | * License. See the file "COPYING" in the main directory of this archive | ||
| 10 | * for more details. | ||
| 11 | */ | ||
| 12 | #include <linux/kernel.h> | ||
| 13 | #include <linux/module.h> | ||
| 14 | #include <asm/dma.h> | ||
| 15 | |||
| 16 | /* | ||
| 17 | * This implements a small wrapper set to make code using the old ISA DMA API | ||
| 18 | * work with the SH DMA API. Since most of the work in the new API happens | ||
| 19 | * at ops->xfer() time, we simply use the various set_dma_xxx() routines to | ||
| 20 | * fill in per-channel info, and then hand hand this off to ops->xfer() at | ||
| 21 | * enable_dma() time. | ||
| 22 | * | ||
| 23 | * For channels that are doing on-demand data transfer via cascading, the | ||
| 24 | * channel itself will still need to be configured through the new API. As | ||
| 25 | * such, this code is meant for only the simplest of tasks (and shouldn't be | ||
| 26 | * used in any new drivers at all). | ||
| 27 | * | ||
| 28 | * NOTE: ops->xfer() is the preferred way of doing things. However, there | ||
| 29 | * are some users of the ISA DMA API that exist in common code that we | ||
| 30 | * don't necessarily want to go out of our way to break, so we still | ||
| 31 | * allow for some compatibility at that level. Any new code is strongly | ||
| 32 | * advised to run far away from the ISA DMA API and use the SH DMA API | ||
| 33 | * directly. | ||
| 34 | */ | ||
| 35 | unsigned long claim_dma_lock(void) | ||
| 36 | { | ||
| 37 | unsigned long flags; | ||
| 38 | |||
| 39 | spin_lock_irqsave(&dma_spin_lock, flags); | ||
| 40 | |||
| 41 | return flags; | ||
| 42 | } | ||
| 43 | EXPORT_SYMBOL(claim_dma_lock); | ||
| 44 | |||
| 45 | void release_dma_lock(unsigned long flags) | ||
| 46 | { | ||
| 47 | spin_unlock_irqrestore(&dma_spin_lock, flags); | ||
| 48 | } | ||
| 49 | EXPORT_SYMBOL(release_dma_lock); | ||
| 50 | |||
| 51 | void disable_dma(unsigned int chan) | ||
| 52 | { | ||
| 53 | /* Nothing */ | ||
| 54 | } | ||
| 55 | EXPORT_SYMBOL(disable_dma); | ||
| 56 | |||
| 57 | void enable_dma(unsigned int chan) | ||
| 58 | { | ||
| 59 | struct dma_info *info = get_dma_info(chan); | ||
| 60 | struct dma_channel *channel = &info->channels[chan]; | ||
| 61 | |||
| 62 | info->ops->xfer(channel); | ||
| 63 | } | ||
| 64 | EXPORT_SYMBOL(enable_dma); | ||
| 65 | |||
| 66 | void clear_dma_ff(unsigned int chan) | ||
| 67 | { | ||
| 68 | /* Nothing */ | ||
| 69 | } | ||
| 70 | EXPORT_SYMBOL(clear_dma_ff); | ||
| 71 | |||
| 72 | void set_dma_mode(unsigned int chan, char mode) | ||
| 73 | { | ||
| 74 | struct dma_info *info = get_dma_info(chan); | ||
| 75 | struct dma_channel *channel = &info->channels[chan]; | ||
| 76 | |||
| 77 | channel->mode = mode; | ||
| 78 | } | ||
| 79 | EXPORT_SYMBOL(set_dma_mode); | ||
| 80 | |||
| 81 | void set_dma_addr(unsigned int chan, unsigned int addr) | ||
| 82 | { | ||
| 83 | struct dma_info *info = get_dma_info(chan); | ||
| 84 | struct dma_channel *channel = &info->channels[chan]; | ||
| 85 | |||
| 86 | /* | ||
| 87 | * Single address mode is the only thing supported through | ||
| 88 | * this interface. | ||
| 89 | */ | ||
| 90 | if ((channel->mode & DMA_MODE_MASK) == DMA_MODE_READ) { | ||
| 91 | channel->sar = addr; | ||
| 92 | } else { | ||
| 93 | channel->dar = addr; | ||
| 94 | } | ||
| 95 | } | ||
| 96 | EXPORT_SYMBOL(set_dma_addr); | ||
| 97 | |||
| 98 | void set_dma_count(unsigned int chan, unsigned int count) | ||
| 99 | { | ||
| 100 | struct dma_info *info = get_dma_info(chan); | ||
| 101 | struct dma_channel *channel = &info->channels[chan]; | ||
| 102 | |||
| 103 | channel->count = count; | ||
| 104 | } | ||
| 105 | EXPORT_SYMBOL(set_dma_count); | ||
| 106 | |||
