aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-10 00:01:11 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-10 00:01:11 -0400
commit0fc2f137226eff4c9dd90864dda5c237474c3ec5 (patch)
tree50ec67f1f9d144a3ceb5ccff45a37bc5005f6c3d /Documentation
parentdcded10f6dce10411b16134ce9cc87bfdf75c13f (diff)
parentaab2393e2ec52c74b419af7c26a12e21584e483b (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (32 commits) Blackfin: gpio: add a debounce stub Blackfin: update defconfigs Blackfin: remove CONFIG_MEM_GENERIC_BOARD Blackfin: dpmc: punt unnecessary RTC_ISTAT clearing Blackfin: unify rotary encoder bitmasks Blackfin: unify SDH/RSI bitmasks Blackfin: BF54x: tweak DMAC MMR naming to match other ports Blackfin: TWI: clean up the MMR names Blackfin: add EVT_OVERRIDE/IPRIO core MMR helpers Blackfin: add support for dynamic ftrace Blackfin: add support for LZO compressed kernels Blackfin: portmux: fix peripheral map overflow when requesting pins Blackfin: document SPI CS limitations with CPHA=0 Blackfin: remove useless and outdated documentation Blackfin: BF51x/BF52x: support GPIO Hysteresis/Schmitt Trigger options Blackfin: gpio/portmux: clean up whitespace corruption Blackfin: make sure mmiowb inserts a write barrier with SSYNC Blackfin: fix DMA/cache bug when resuming from suspend to RAM Blackfin: BF51x: fix handling of PH8 (the "internal" SPI0SEL4 pin) Blackfin: add a GPIO_DEFAULT_BOOT_SPI_CS ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/blackfin/00-INDEX11
-rw-r--r--Documentation/blackfin/Filesystems169
-rw-r--r--Documentation/blackfin/bfin-spi-notes.txt14
-rw-r--r--Documentation/blackfin/cachefeatures.txt55
4 files changed, 18 insertions, 231 deletions
diff --git a/Documentation/blackfin/00-INDEX b/Documentation/blackfin/00-INDEX
index c34e12440fec..2df0365f2dff 100644
--- a/Documentation/blackfin/00-INDEX
+++ b/Documentation/blackfin/00-INDEX
@@ -1,11 +1,8 @@
100-INDEX 100-INDEX
2 - This file 2 - This file
3 3
4cachefeatures.txt 4bfin-gpio-notes.txt
5 - Supported cache features.
6
7Filesystems
8 - Requirements for mounting the root file system.
9
10bfin-gpio-note.txt
11 - Notes in developing/using bfin-gpio driver. 5 - Notes in developing/using bfin-gpio driver.
6
7bfin-spi-notes.txt
8 - Notes for using bfin spi bus driver.
diff --git a/Documentation/blackfin/Filesystems b/Documentation/blackfin/Filesystems
deleted file mode 100644
index 51260a1b8032..000000000000
--- a/Documentation/blackfin/Filesystems
+++ /dev/null
@@ -1,169 +0,0 @@
1/*
2 * File: Documentation/blackfin/Filesystems
3 * Based on:
4 * Author:
5 *
6 * Created:
7 * Description: This file contains the simple DMA Implementation for Blackfin
8 *
9 * Rev: $Id: Filesystems 2384 2006-11-01 04:12:43Z magicyang $
10 *
11 * Modified:
12 * Copyright 2004-2006 Analog Devices Inc.
13 *
14 * Bugs: Enter bugs at http://blackfin.uclinux.org/
15 *
16 */
17
18 How to mount the root file system in uClinux/Blackfin
19 -----------------------------------------------------
20
211 Mounting EXT3 File system.
22 ------------------------
23
24 Creating an EXT3 File system for uClinux/Blackfin:
25
26
27Please follow the steps to form the EXT3 File system and mount the same as root
28file system.
29
30a Make an ext3 file system as large as you want the final root file
31 system.
32
33 mkfs.ext3 /dev/ram0 <your-rootfs-size-in-1k-blocks>
34
35b Mount this Empty file system on a free directory as:
36
37 mount -t ext3 /dev/ram0 ./test
38 where ./test is the empty directory.
39
40c Copy your root fs directory that you have so carefully made over.
41
42 cp -af /tmp/my_final_rootfs_files/* ./test
43
44 (For ex: cp -af uClinux-dist/romfs/* ./test)
45
46d If you have done everything right till now you should be able to see
47 the required "root" dir's (that's etc, root, bin, lib, sbin...)
48
49e Now unmount the file system
50
51 umount ./test
52
53f Create the root file system image.
54
55 dd if=/dev/ram0 bs=1k count=<your-rootfs-size-in-1k-blocks> \
56 > ext3fs.img
57
58
59Now you have to tell the kernel that will be mounting this file system as
60rootfs.
61So do a make menuconfig under kernel and select the Ext3 journaling file system
62support under File system --> submenu.
63
64
652. Mounting EXT2 File system.
66 -------------------------
67
68By default the ext2 file system image will be created if you invoke make from
69the top uClinux-dist directory.
70
71
723. Mounting CRAMFS File System
73 ----------------------------
74
75To create a CRAMFS file system image execute the command
76
77 mkfs.cramfs ./test cramfs.img
78
79 where ./test is the target directory.
80
81
824. Mounting ROMFS File System
83 --------------------------
84
85To create a ROMFS file system image execute the command
86
87 genromfs -v -V "ROMdisk" -f romfs.img -d ./test
88
89 where ./test is the target directory
90
91
925. Mounting the JFFS2 Filesystem
93 -----------------------------
94
95To create a compressed JFFS filesystem (JFFS2), please execute the command
96
97 mkfs.jffs2 -d ./test -o jffs2.img
98
99 where ./test is the target directory.
100
101However, please make sure the following is in your kernel config.
102
103/*
104 * RAM/ROM/Flash chip drivers
105 */
106#define CONFIG_MTD_CFI 1
107#define CONFIG_MTD_ROM 1
108/*
109 * Mapping drivers for chip access
110 */
111#define CONFIG_MTD_COMPLEX_MAPPINGS 1
112#define CONFIG_MTD_BF533 1
113#undef CONFIG_MTD_UCLINUX
114
115Through the u-boot boot loader, use the jffs2.img in the corresponding
116partition made in linux-2.6.x/drivers/mtd/maps/bf533_flash.c.
117
118NOTE - Currently the Flash driver is available only for EZKIT. Watch out for a
119 STAMP driver soon.
120
121
1226. Mounting the NFS File system
123 -----------------------------
124
125 For mounting the NFS please do the following in the kernel config.
126
127 In Networking Support --> Networking options --> TCP/IP networking -->
128 IP: kernel level autoconfiguration
129
130 Enable BOOTP Support.
131
132 In Kernel hacking --> Compiled-in kernel boot parameter add the following
133
134 root=/dev/nfs rw ip=bootp
135
136 In File system --> Network File system, Enable
137
138 NFS file system support --> NFSv3 client support
139 Root File system on NFS
140
141 in uClibc menuconfig, do the following
142 In Networking Support
143 enable Remote Procedure Call (RPC) support
144 Full RPC Support
145
146 On the Host side, ensure that /etc/dhcpd.conf looks something like this
147
148 ddns-update-style ad-hoc;
149 allow bootp;
150 subnet 10.100.4.0 netmask 255.255.255.0 {
151 default-lease-time 122209600;
152 max-lease-time 31557600;
153 group {
154 host bf533 {
155 hardware ethernet 00:CF:52:49:C3:01;
156 fixed-address 10.100.4.50;
157 option root-path "/home/nfsmount";
158 }
159 }
160
161 ensure that /etc/exports looks something like this
162 /home/nfsmount *(rw,no_root_squash,no_all_squash)
163
164 run the following commands as root (may differ depending on your
165 distribution) :
166 - service nfs start
167 - service portmap start
168 - service dhcpd start
169 - /usr/sbin/exportfs
diff --git a/Documentation/blackfin/bfin-spi-notes.txt b/Documentation/blackfin/bfin-spi-notes.txt
new file mode 100644
index 000000000000..556fa877f2e8
--- /dev/null
+++ b/Documentation/blackfin/bfin-spi-notes.txt
@@ -0,0 +1,14 @@
1SPI Chip Select behavior:
2
3With the Blackfin on-chip SPI peripheral, there is some logic tied to the CPHA
4bit whether the Slave Select Line is controlled by hardware (CPHA=0) or
5controlled by software (CPHA=1). However, the Linux SPI bus driver assumes that
6the Slave Select is always under software control and being asserted during
7the entire SPI transfer. - And not just bits_per_word duration.
8
9In most cases you can utilize SPI MODE_3 instead of MODE_0 to work-around this
10behavior. If your SPI slave device in question requires SPI MODE_0 or MODE_2
11timing, you can utilize the GPIO controlled SPI Slave Select option instead.
12
13You can even use the same pin whose peripheral role is a SSEL,
14but use it as a GPIO instead.
diff --git a/Documentation/blackfin/cachefeatures.txt b/Documentation/blackfin/cachefeatures.txt
deleted file mode 100644
index 75de51f94515..000000000000
--- a/Documentation/blackfin/cachefeatures.txt
+++ /dev/null
@@ -1,55 +0,0 @@
1/*
2 * File: Documentation/blackfin/cachefeatures.txt
3 * Based on:
4 * Author:
5 *
6 * Created:
7 * Description: This file contains the simple DMA Implementation for Blackfin
8 *
9 * Rev: $Id: cachefeatures.txt 2384 2006-11-01 04:12:43Z magicyang $
10 *
11 * Modified:
12 * Copyright 2004-2006 Analog Devices Inc.
13 *
14 * Bugs: Enter bugs at http://blackfin.uclinux.org/
15 *
16 */
17
18 - Instruction and Data cache initialization.
19 icache_init();
20 dcache_init();
21
22 - Instruction and Data cache Invalidation Routines, when flushing the
23 same is not required.
24 _icache_invalidate();
25 _dcache_invalidate();
26
27 Also, for invalidating the entire instruction and data cache, the below
28 routines are provided (another method for invalidation, refer page no 267 and 287 of
29 ADSP-BF533 Hardware Reference manual)
30
31 invalidate_entire_dcache();
32 invalidate_entire_icache();
33
34 -External Flushing of Instruction and data cache routines.
35
36 flush_instruction_cache();
37 flush_data_cache();
38
39 - Internal Flushing of Instruction and Data Cache.
40
41 icplb_flush();
42 dcplb_flush();
43
44 - Miscellaneous cache functions.
45
46 flush_cache_all();
47 flush_cache_mm();
48 invalidate_dcache_range();
49 flush_dcache_range();
50 flush_dcache_page();
51 flush_cache_range();
52 flush_cache_page();
53 invalidate_dcache_range();
54 flush_page_to_ram();
55
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 19:37:31 -0500