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author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-19 16:18:39 -0500 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-19 16:18:39 -0500 |
commit | 59b8175c771040afcd4ad67022b0cc80c216b866 (patch) | |
tree | 4ef5935bee1e342716d49b9d4b99e3fa835526e6 /Documentation | |
parent | 920841d8d1d61bc12b43f95a579a5374f6d98f81 (diff) | |
parent | 3b0eb4a195a124567cd0dd6f700f8388def542c6 (diff) |
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: (117 commits)
[ARM] 4058/2: iop32x: set ->broken_parity_status on n2100 onboard r8169 ports
[ARM] 4140/1: AACI stability add ac97 timeout and retries
[ARM] 4139/1: AACI record support
[ARM] 4138/1: AACI: multiple channel support for IRQ handling
[ARM] 4211/1: Provide a defconfig for ns9xxx
[ARM] 4210/1: base for new machine type "NetSilicon NS9360"
[ARM] 4222/1: S3C2443: Remove reference to missing S3C2443_PM
[ARM] 4221/1: S3C2443: DMA support
[ARM] 4220/1: S3C24XX: DMA system initialised from sysdev
[ARM] 4219/1: S3C2443: DMA source definitions
[ARM] 4218/1: S3C2412: fix CONFIG_CPU_S3C2412_ONLY wrt to S3C2443
[ARM] 4217/1: S3C24XX: remove the dma channel show at startup
[ARM] 4090/2: avoid clash between PXA and SA1111 defines
[ARM] 4216/1: add .gitignore entries for ARM specific files
[ARM] 4214/2: S3C2410: Add Armzone QT2410
[ARM] 4215/1: s3c2410 usb device: per-platform vbus_draw
[ARM] 4213/1: S3C2410 - Update definition of ADCTSC_XY_PST
[ARM] 4098/1: ARM: rtc_lock only used with rtc_cmos
[ARM] 4137/1: Add kexec support
[ARM] 4201/1: SMP barriers pair needed for the secondary boot process
...
Fix up conflict due to typedef removal in sound/arm/aaci.h
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/arm/Samsung-S3C24XX/DMA.txt | 46 | ||||
-rw-r--r-- | Documentation/arm/Samsung-S3C24XX/Overview.txt | 21 |
2 files changed, 63 insertions, 4 deletions
diff --git a/Documentation/arm/Samsung-S3C24XX/DMA.txt b/Documentation/arm/Samsung-S3C24XX/DMA.txt new file mode 100644 index 000000000000..37f4edcc5d87 --- /dev/null +++ b/Documentation/arm/Samsung-S3C24XX/DMA.txt | |||
@@ -0,0 +1,46 @@ | |||
1 | S3C2410 DMA | ||
2 | =========== | ||
3 | |||
4 | Introduction | ||
5 | ------------ | ||
6 | |||
7 | The kernel provides an interface to manage DMA transfers | ||
8 | using the DMA channels in the cpu, so that the central | ||
9 | duty of managing channel mappings, and programming the | ||
10 | channel generators is in one place. | ||
11 | |||
12 | |||
13 | DMA Channel Ordering | ||
14 | -------------------- | ||
15 | |||
16 | Many of the range do not have connections for the DMA | ||
17 | channels to all sources, which means that some devices | ||
18 | have a restricted number of channels that can be used. | ||
19 | |||
20 | To allow flexibilty for each cpu type and board, the | ||
21 | dma code can be given an dma ordering structure which | ||
22 | allows the order of channel search to be specified, as | ||
23 | well as allowing the prohibition of certain claims. | ||
24 | |||
25 | struct s3c24xx_dma_order has a list of channels, and | ||
26 | each channel within has a slot for a list of dma | ||
27 | channel numbers. The slots are searched in order, for | ||
28 | the presence of a dma channel number with DMA_CH_VALID | ||
29 | orred in. | ||
30 | |||
31 | If the order has the flag DMA_CH_NEVER set, then after | ||
32 | checking the channel list, the system will return no | ||
33 | found channel, thus denying the request. | ||
34 | |||
35 | A board support file can call s3c24xx_dma_order_set() | ||
36 | to register an complete ordering set. The routine will | ||
37 | copy the data, so the original can be discared with | ||
38 | __initdata. | ||
39 | |||
40 | |||
41 | Authour | ||
42 | ------- | ||
43 | |||
44 | Ben Dooks, | ||
45 | Copyright (c) 2007 Ben Dooks, Simtec Electronics | ||
46 | Licensed under the GPL v2 | ||
diff --git a/Documentation/arm/Samsung-S3C24XX/Overview.txt b/Documentation/arm/Samsung-S3C24XX/Overview.txt index 28d014714ab8..c31b76fa66c4 100644 --- a/Documentation/arm/Samsung-S3C24XX/Overview.txt +++ b/Documentation/arm/Samsung-S3C24XX/Overview.txt | |||
@@ -8,13 +8,10 @@ Introduction | |||
8 | 8 | ||
9 | The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported | 9 | The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported |
10 | by the 's3c2410' architecture of ARM Linux. Currently the S3C2410, | 10 | by the 's3c2410' architecture of ARM Linux. Currently the S3C2410, |
11 | S3C2440 and S3C2442 devices are supported. | 11 | S3C2412, S3C2413, S3C2440 and S3C2442 devices are supported. |
12 | 12 | ||
13 | Support for the S3C2400 series is in progress. | 13 | Support for the S3C2400 series is in progress. |
14 | 14 | ||
15 | Support for the S3C2412 and S3C2413 CPUs is being merged. | ||
16 | |||
17 | |||
18 | Configuration | 15 | Configuration |
19 | ------------- | 16 | ------------- |
20 | 17 | ||
@@ -26,6 +23,22 @@ Configuration | |||
26 | please check the machine specific documentation. | 23 | please check the machine specific documentation. |
27 | 24 | ||
28 | 25 | ||
26 | Layout | ||
27 | ------ | ||
28 | |||
29 | The core support files are located in the platform code contained in | ||
30 | arch/arm/plat-s3c24xx with headers in include/asm-arm/plat-s3c24xx. | ||
31 | This directory should be kept to items shared between the platform | ||
32 | code (arch/arm/plat-s3c24xx) and the arch/arm/mach-s3c24* code. | ||
33 | |||
34 | Each cpu has a directory with the support files for it, and the | ||
35 | machines that carry the device. For example S3C2410 is contained | ||
36 | in arch/arm/mach-s3c2410 and S3C2440 in arch/arm/mach-s3c2440 | ||
37 | |||
38 | Register, kernel and platform data definitions are held in the | ||
39 | include/asm-arm/arch-s3c2410 directory. | ||
40 | |||
41 | |||
29 | Machines | 42 | Machines |
30 | -------- | 43 | -------- |
31 | 44 | ||