Initial commit

0001-make-ektf3k-driver-report-non-MT-events-too.patch

@@ -0,0 +1,50 @@
+From ad8725fb07407deb688813e075b05e790dac2878 Mon Sep 17 00:00:00 2001
+From: Seth Forshee <seth.forshee@canonical.com>
+Date: Tue, 18 Feb 2014 23:07:22 +1100
+Subject: [PATCH] make ektf3k driver report non-MT events too
+
+Change-Id: Ia4f05b33f06d7a8fc74e65330f9c41df8a8ba7a9
+---
+ drivers/input/touchscreen/ektf3k.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/input/touchscreen/ektf3k.c b/drivers/input/touchscreen/ektf3k.c
+index 4b6a7e7..28fee64 100755
+--- a/drivers/input/touchscreen/ektf3k.c
++++ b/drivers/input/touchscreen/ektf3k.c
+@@ -967,6 +967,7 @@ static void elan_ktf3k_ts_report_data(struct i2c_client *client, uint8_t *buf)
+               fbits = fbits >> 1;
+               idx += 3;
+ 	    }
++          input_mt_report_pointer_emulation(ts->input_dev, true);
+           input_sync(idev);
+ 	} // checksum
+ 	else {
+@@ -1017,6 +1018,7 @@ static void elan_ktf3k_ts_report_data2(struct i2c_client *client, uint8_t *buf)
+               fbits = fbits >> 1;
+               idx += 3;
+ 	    }
++          input_mt_report_pointer_emulation(ts->input_dev, true);
+           input_sync(idev);
+ 	} // checksum
+ 	else {
+@@ -1542,11 +1544,15 @@ static int elan_ktf3k_ts_probe(struct i2c_client *client,
+ 	}
+ 	ts->input_dev->name = "elan-touchscreen";  
+ 
+-	//set_bit(BTN_TOUCH, ts->input_dev->keybit);
++	set_bit(BTN_TOUCH, ts->input_dev->keybit);
+ 	ts->abs_x_max =  pdata->abs_x_max;
+ 	ts->abs_y_max = pdata->abs_y_max;
+ 	touch_debug(DEBUG_INFO, "[Elan] Max X=%d, Max Y=%d\n", ts->abs_x_max, ts->abs_y_max);
+ 
++    input_set_abs_params(ts->input_dev, ABS_X, pdata->abs_y_min, pdata->abs_y_max, 0, 0); // for 800 * 1280 
++    input_set_abs_params(ts->input_dev, ABS_Y, pdata->abs_x_min, pdata->abs_x_max, 0, 0); // for 800 * 1280 
++    input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, MAX_FINGER_PRESSURE, 0, 0);
++
+ 	input_mt_init_slots(ts->input_dev, FINGER_NUM);
+ 	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, pdata->abs_y_min,  pdata->abs_y_max, 0, 0); // for 800 * 1280 
+ 	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, pdata->abs_x_min,  pdata->abs_x_max, 0, 0);// for 800 * 1280 
+-- 
+1.8.5.3
+

README

@@ -0,0 +1,107 @@
+# Arch Linux on Nexus 7 Flo Native
+
+Here are my instructions on getting Arch Linux ARM natively booting on the
+Nexus 7 Flo. Ideally this would be booting from a usb stick or a dedicated
+partition on the mmc but this is working for me now. Once I get a bluetooth
+keyboard I will try to get it working from a usb stick.
+
+## BUGS!!!
+There is no frambuffer console :( 
+If you cannot get it booting you will need to
+reboot into recovery and check /proc/last_kmsg for the errors. Or try and build
+the UART cable (which I failed at)
+
+There is only xf86-video-fbdev working and no DRM or anything fancy
+
+The Software Refresher in the kernel does not work. You will need to run my
+refresher app or fix the kernel :)
+
+1: I roughly followed the instructions form
+https://github.com/borh/nexus-7-2013-arch-scripts to get a working chroot
+first.
+
+2: Edit the init script to point to your arch.img or partition
+
+3: Edit and Run makebootimage.sh
+
+4: fastboot boot newboot
+
+5: ???
+
+6: Profit
+
+## To get WiFi Working
+
+A normal Nexus 7 Flo boot will call /system/bin/conn_init which does a whole
+lot of verifying your mac address and then writes out a config with the mac
+address in it. Very annoying. To get around this you need a copy of the wifi
+configs and manually enable the wifi driver since it does not start on boot.
+The firmware.service is only needed since I do not load the firmware in the
+initramfs (which I am haven't done yet)
+
+1: Copy /system/vendor/firmware [android] to /usr/lib/firmware [arch]
+2: rm /usr/lib/firmware/wlan/prima/{WCNSS_qcom_cfg.ini,WCNSS_qcom_wlan_nv.bin} <-- these are simlinks
+3: cp /data/misc/wifi/{WCNSS_qcom_cfg.ini,WCNSS_qcom_wlan_nv.bin} /usr/lib/firmware/wlan/prima/ <-- these are the files which conn_init writes your mac address to
+
+4: Copy firmware.service to /etc/systemd/system/ 
+5: ln -s /etc/systemd/system/firmware.service /etc/systemd/system/multi-user.target.wants/firmware.service
+
+6: Create a wpa_supplicant-nl80211@wlan0.service with your wpa_supplicant.conf
+details
+7: ln -s /etc/systemd/system/dhcpcd.service /etc/systemd/system/multi-user.target.wants/dhcpcd.service
+8: ln -s /etc/systemd/system/sshd.service /etc/systemd/system/multi-user.target.wants/sshd.service
+
+NOTE: The wifi drivers are really flakey. You might have better luck with a
+static ip. If anything fails reboot into recovery and check /proc/last_kmsg
+
+## To get X working
+Since there is no framebuffer console you cannot start X manually (unless you
+are able to get ssh working, see above) Auto login is your friend.
+
+Be sure to install a window manager or something first and then follow
+https://wiki.archlinux.org/index.php/Automatic_login_to_virtual_console and 
+https://wiki.archlinux.org/index.php/Start_X_at_Login
+
+Your .xinitrc should contain something like
+~/refresher &
+exec awesome
+
+## Refreshing (refresher.c)
+Since the MSMFB_SW_REFRESHER does not seem to be working i wrote this instead.
+Just compile and put in you ~/ or whereever so xinit can run it.
+
+# Kernel stuff
+
+## To get Touchscreen working
+Apply 0001-make-ektf3k-driver-report-non-MT-events-too.patch
+
+## Kernel configs
+I used the following additional configs to get this working. Some might not be
+necessary but it helps with debugging
+
+I havent figured out how to get fbdev working with RGBA8888 so use RGB565 for
+now
+
+CONFIG_FB_MSM_DEFAULT_DEPTH_RGB565=y
+CONFIG_FHANDLE=y
+CONFIG_DEVTMPFS=y
+CONFIG_UTS_NS=y
+CONFIG_IPC_NS=y
+CONFIG_USER_NS=y
+CONFIG_PID_NS=y
+CONFIG_NET_NS=y
+CONFIG_DEVPTS_MULTIPLE_INSTANCES=y
+CONFIG_FANOTIFY=y
+CONFIG_FANOTIFY_ACCESS_PERMISSIONS=y
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_DEBUG_SPINLOCK=y
+CONFIG_DEBUG_MUTEXES=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_STACKTRACE=y
+CONFIG_DEBUG_BUGVERBOSE=y
+CONFIG_SECURITY_SELINUX_BOOTPARAM=y
+
+## Build initramfs
+1: Edit makebootimage.sh with paths
+2: cd systemd-initramfs; find . | cpio -o -H newc | gzip > ../minimal.initramfs
+3: ./makebootimage.sh

makebootimage.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+KERNEL=~/android/system/out/target/product/flo/kernel
+INITRAMFS=minimal.initramfs
+
+~/android/system/out/host/linux-x86/bin/mkbootimg --kernel $KERNEL --cmdline "console=ttyHSL0,115200,n8 console=tty1 androidboot.hardware=flo user_debug=31 msm_rtb.filter=0x3F ehci-hcd.park=3 selinux=0" --base 0x80200000 --pagesize 2048 --ramdisk_offset 0x02000000 --ramdisk $INITRAMFS --output newboot

refresher.c

@@ -0,0 +1,65 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <time.h>
+
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include <linux/fb.h>
+
+struct fb_info{
+	int fd;
+	void *ptr;
+	struct fb_var_screeninfo var;
+	struct fb_fix_screeninfo fix;
+};
+
+void fb_getinfo(struct fb_info *fb_info){
+	printf("fb res %dx%d virtual %dx%d, line_len %d\n",
+			fb_info->var.xres, fb_info->var.yres,
+			fb_info->var.xres_virtual, fb_info->var.yres_virtual,
+			fb_info->fix.line_length);
+	printf("dim %dmm x %dmm\n", fb_info->var.width, fb_info->var.height);
+	printf("xoffset %d yoffset %d\n", fb_info->var.xoffset, fb_info->var.yoffset);
+}
+int fb_open(struct fb_info *fb_info){
+
+    int fd = open("/dev/fb0", O_RDWR);
+
+    if(fd < 0){
+        printf("Failed to open fb\n");
+        return 1;
+    }
+
+    fb_info->fd = fd;
+    return 0;
+}
+
+
+void flip_buffer(struct fb_info *fb_info, int n){
+    if( ioctl(fb_info->fd, FBIOPAN_DISPLAY, &fb_info->var) < 0 ){
+        printf("Failed FBIOPAN_DISPLAY\n");
+    }
+}
+int main(int argc, char *argv[]){
+  
+    setpriority(PRIO_PROCESS, 0, -20);
+
+    struct fb_info fb_info;
+    fb_open(&fb_info);
+
+    while(1){
+        flip_buffer(&fb_info,0);
+        usleep(16666);
+    }
+    return 0;
+}

systemd-initramfs/init

@@ -0,0 +1 @@
+sbin/init

systemd-initramfs/sbin/init

@@ -0,0 +1,30 @@
+#!/sbin/busybox1 sh
+
+_PATH="$PATH"
+export BB=/sbin/busybox1
+
+cd /
+
+$BB mount -t devtmpfs devtmpfs /dev -o mode=0755,nosuid
+
+$BB mkdir /dev/pts
+$BB mkdir /dev/socket
+
+$BB mount -t proc proc /proc -o nosuid,noexec,nodev
+$BB mount -t sysfs sys /sys -o nosuid,noexec,nodev
+
+$BB mdev -s
+
+$BB mount -t ext4 /dev/mmcblk0p30 /data
+
+$BB mknod /dev/loop256 b 7 256
+$BB losetup /dev/loop256 /data/arch.img
+$BB mount -t ext4 -o rw,noatime /dev/loop256 /data/arch 
+
+$BB mkdir /cache
+$BB mount -t ext4 /dev/mmcblk0p23 /cache
+
+export PATH="${_PATH}"
+
+#exec /sbin/init2
+exec /sbin/busybox1 switch_root /data/arch /sbin/init