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author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-15 00:42:43 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-15 00:42:43 +0400 |
commit | 2cf4d4514d5b43c1f3b64bd0ec8b9853bde8f1dc (patch) | |
tree | e35a625496acc6ac852846d40b8851186b9d1ac4 /arch/arm/plat-s3c/dma.c | |
parent | 44b7532b8b464f606053562400719c9c21276037 (diff) | |
parent | ce53895a5d24e0ee19fb92f56c17323fb4c9ab27 (diff) | |
download | linux-2cf4d4514d5b43c1f3b64bd0ec8b9853bde8f1dc.tar.xz |
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (417 commits)
MAINTAINERS: EB110ATX is not ebsa110
MAINTAINERS: update Eric Miao's email address and status
fb: add support of LCD display controller on pxa168/910 (base layer)
[ARM] 5552/1: ep93xx get_uart_rate(): use EP93XX_SYSCON_PWRCNT and EP93XX_SYSCON_PWRCN
[ARM] pxa/sharpsl_pm: zaurus needs generic pxa suspend/resume routines
[ARM] 5544/1: Trust PrimeCell resource sizes
[ARM] pxa/sharpsl_pm: cleanup of gpio-related code.
[ARM] pxa/sharpsl_pm: drop set_irq_type calls
[ARM] pxa/sharpsl_pm: merge pxa-specific code into generic one
[ARM] pxa/sharpsl_pm: merge the two sharpsl_pm.c since it's now pxa specific
[ARM] sa1100: remove unused collie_pm.c
[ARM] pxa: fix the conflicting non-static declarations of global_gpios[]
[ARM] 5550/1: Add default configure file for w90p910 platform
[ARM] 5549/1: Add clock api for w90p910 platform.
[ARM] 5548/1: Add gpio api for w90p910 platform
[ARM] 5551/1: Add multi-function pin api for w90p910 platform.
[ARM] Make ARM_VIC_NR depend on ARM_VIC
[ARM] 5546/1: ARM PL022 SSP/SPI driver v3
ARM: OMAP4: SMP: Update defconfig for OMAP4430
ARM: OMAP4: SMP: Enable SMP support for OMAP4430
...
Diffstat (limited to 'arch/arm/plat-s3c/dma.c')
-rw-r--r-- | arch/arm/plat-s3c/dma.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c/dma.c b/arch/arm/plat-s3c/dma.c new file mode 100644 index 000000000000..c9db75c06af5 --- /dev/null +++ b/arch/arm/plat-s3c/dma.c @@ -0,0 +1,86 @@ +/* linux/arch/arm/plat-s3c/dma.c + * + * Copyright (c) 2003-2005,2006,2009 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C DMA core + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +struct s3c2410_dma_buf; + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/errno.h> + +#include <mach/dma.h> +#include <mach/irqs.h> + +#include <plat/dma-plat.h> + +/* dma channel state information */ +struct s3c2410_dma_chan s3c2410_chans[S3C_DMA_CHANNELS]; +struct s3c2410_dma_chan *s3c_dma_chan_map[DMACH_MAX]; + +/* s3c_dma_lookup_channel + * + * change the dma channel number given into a real dma channel id +*/ + +struct s3c2410_dma_chan *s3c_dma_lookup_channel(unsigned int channel) +{ + if (channel & DMACH_LOW_LEVEL) + return &s3c2410_chans[channel & ~DMACH_LOW_LEVEL]; + else + return s3c_dma_chan_map[channel]; +} + +/* do we need to protect the settings of the fields from + * irq? +*/ + +int s3c2410_dma_set_opfn(unsigned int channel, s3c2410_dma_opfn_t rtn) +{ + struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel); + + if (chan == NULL) + return -EINVAL; + + pr_debug("%s: chan=%p, op rtn=%p\n", __func__, chan, rtn); + + chan->op_fn = rtn; + + return 0; +} +EXPORT_SYMBOL(s3c2410_dma_set_opfn); + +int s3c2410_dma_set_buffdone_fn(unsigned int channel, s3c2410_dma_cbfn_t rtn) +{ + struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel); + + if (chan == NULL) + return -EINVAL; + + pr_debug("%s: chan=%p, callback rtn=%p\n", __func__, chan, rtn); + + chan->callback_fn = rtn; + + return 0; +} +EXPORT_SYMBOL(s3c2410_dma_set_buffdone_fn); + +int s3c2410_dma_setflags(unsigned int channel, unsigned int flags) +{ + struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel); + + if (chan == NULL) + return -EINVAL; + + chan->flags = flags; + return 0; +} +EXPORT_SYMBOL(s3c2410_dma_setflags); |