Monday 29 March 2010 16:19:23 Janusz Krzysztofik napisał(a):
This series of patches adds support for an external keyboard (called mailboard) connected to the Amstrad Delta (E3) videophone.
The series is based on a patch by Matt Callow, created against linux-omap-2.6.19[1], initially submitted to the e3-hacking mailing list in April 2006[2].
Since the keyboard serial clock line is connected to a GPIO line, it generates interrupts every single bit received. In order to handle this correctly, the code makes use of a FIQ hardware feature. Since all GPIO generated interrupts would be converted to FIQ, the handler must include support for all supported GPIO connected devices: the keyboard, a modem and a hook switch.
My modifications to the original patch include:
- split into several patches,
- refresh against a recent linux version,
- a lot of cleanups, mainly to get rid of checkpatch reported issues,
- add support for handling interrupts generated by a GPIO line that the meanwhile activated hook switch hangs off.
v2 changes:
- remove scan code to key code mapping from the serio driver, that doesn't belong here and should be set up from userspace;
Hi,
For those of you who would like to do some testing:
You'll need a utility for installing a key table. Given no single hint from linux-input team, I ended up using input-kbd, that is part of input-utils package, at least on Gentoo and Debian. Other possibilities I know of: - V4L guys provided linux/Documentation/DocBook/v4l/keytable.c.xml example, - http://0pointer.de/lennart/projects/keyfuzz/
My input-kbd compatible /etc/mailboard.map for my Delta looks like this: ------------------------- 112 = KEY_ESC 122 = KEY_F1 70 = KEY_F2 124 = KEY_F3 119 = KEY_F4 114 = KEY_F5 105 = KEY_F6 26 = KEY_F7 42 = KEY_F8 28 = KEY_F9 21 = KEY_F10 113 = KEY_TAB 116 = KEY_1 115 = KEY_2 107 = KEY_3 34 = KEY_4 27 = KEY_5 29 = KEY_6 30 = KEY_7 121 = KEY_8 125 = KEY_9 117 = KEY_0 108 = KEY_BACKSPACE 33 = KEY_Q 35 = KEY_W 36 = KEY_E 38 = KEY_R 82 = KEY_T 93 = KEY_Y 13 = KEY_U 14 = KEY_I 50 = KEY_O 52 = KEY_P 44 = KEY_ENTER 49 = KEY_A 51 = KEY_S 53 = KEY_D 54 = KEY_F 41 = KEY_G 91 = KEY_H 3 = KEY_J 118 = KEY_K 58 = KEY_L 59 = KEY_BACKSLASH # there is no KEY_AT 60 = KEY_LEFTSHIFT 61 = KEY_Z 78 = KEY_X 84 = KEY_C 11 = KEY_V 5 = KEY_B 65 = KEY_N 66 = KEY_M 67 = KEY_DOT 62 = KEY_UP 85 = KEY_RIGHTSHIFT 259 = KEY_LEFTCTRL 6 = KEY_LEFTALT 73 = KEY_RIGHTMETA 75 = KEY_SPACE 68 = KEY_COMMA 22 = KEY_LEFT 46 = KEY_DOWN 9 = KEY_RIGHT ------------------------- You may want to adopt it to better suit your taste.
My udev installs it up automatically for me with this simple rule: ------------------------- ACTION=="add", KERNEL=="event[0-9]*", \ ATTRS{phys}=="GPIO/serio[0-9]*/input[0-9]*", \ RUN+="/usr/bin/input-kbd -f /etc/mailboard.map %n" -------------------------
If you are using Angstrom (or other OpenEmbedded generated distribution), you may want to give my simple recipes/input-utils/input-utils.bb recipe a try: ------------------------- PV = "20081014-${SRCREV}" SRCREV = "101501" SRC_URI = "http://dl.bytesex.org/cvs-snapshots/input-$%7BPV%7D.tar.gz \ file://fix-makefiles.patch;patch=1" LICENSE = "GPL" inherit autotools S = "${WORKDIR}/input" PACKAGES_prepend = "input-kbd input-remote " FILES_input-kbd = "/usr/bin/input-kbd" FILES_input-remote = "/usr/bin/input-send /usr/bin/input-recv" --------------------------
and recipes/input-utils/files/fix-makefiles.patch: -------------------------- --- input/mk/Variables.mk.orig 2008-10-14 12:27:01.000000000 +0200 +++ input/mk/Variables.mk 2010-03-29 17:11:58.000000000 +0200 @@ -30,7 +30,7 @@ MOC ?= $(if $(QTDIR),$(QTDIR
STRIP ?= -s INSTALL ?= install -INSTALL_BINARY := $(INSTALL) $(STRIP) +INSTALL_BINARY := $(INSTALL) INSTALL_SCRIPT := $(INSTALL) INSTALL_DATA := $(INSTALL) -m 644 INSTALL_DIR := $(INSTALL) -d --------------------------
After putting the above two files in your local OE overlay, building the package(s) with "bitbake input-utils" and refreshing your repository Packeges list, all you need is running "opkg install input-kbd" on your Delta.
Have fun, Janusz
thanks to Dmitry Torokhov for advising this,
- no funtional changes in FIQ part (there were no comments in round 1).
There is still one minor issue that I was not able to deal with: when built with CONFIG_OMAP_RESET_CLOCKS=y, the keyboard driver stops working. I have no idea how I could find which clock I should enable to get it working regardless of boot loader used. Any suggestions?
Created and tested against linux-2.6.34-rc2.
Janusz Krzysztofik(5) omap1: Amstrad Delta: add FIQ handler for serial keyboard port interrupt processing omap1: Amstrad Delta: add a handler for processing interrupts generated by the FIQ routine omap1: Amstrad Delta: use FIQ for processing GPIO interrupts input: serio: add support for Amstrad Delta serial keyboard port omap1: Amstrad Delta: modify defconfig for external keyboard support
arch/arm/configs/ams_delta_defconfig | 2 arch/arm/mach-omap1/Kconfig | 8 arch/arm/mach-omap1/Makefile | 3 arch/arm/mach-omap1/ams-delta-fiq-handler.S | 342 +++++++++++++++++++++++ arch/arm/mach-omap1/ams-delta-fiq.c | 175 +++++++++++ arch/arm/mach-omap1/board-ams-delta.c | 6 arch/arm/mach-omap1/include/mach/ams-delta-fiq.h | 57 +++ arch/arm/plat-omap/include/plat/irqs.h | 4 drivers/input/serio/Kconfig | 9 drivers/input/serio/Makefile | 1 drivers/input/serio/ams_delta_keyboard.c | 171 +++++++++++ 11 files changed, 777 insertions(+), 1 deletion(-)
Thanks, Janusz
[1] http://the.earth.li/pub/e3/2.6.19/ams-delta-keyboard.patch [2] http://www.earth.li/pipermail/e3-hacking/2006-April/000453.html