Android - Revision history

JulienB: cleanup

2011-11-03T13:28:23Z

cleanup

← Older revision		Revision as of 15:28, 3 November 2011
Line 154:		Line 154:
	</pre>		</pre>
	===Modify touchscreen driver===		===Modify touchscreen driver===
	Android ~~don~~'t use tslib library so we ~~should~~ add the calibration directly in ~~ts drivers<br>~~		* Android doesn't use tslib library, so we have to add the calibration data directly in the touchscreen driver.
	~~edit~~ ''$ANDROID_KERNEL/drivers/input/touchscreen/tsc2102_ts.c''~~<br>~~		* Edit ''$ANDROID_KERNEL/drivers/input/touchscreen/tsc2102_ts.c'' and add new definitions for X and Y ranges:
	~~Add~~ new definitions for X and Y ranges
	<source lang="c">		<source lang="c">
			#include <linux/spi/tsc2102.h>

	#define DRIVER_NAME "TSC210x Touchscreen"		#define DRIVER_NAME "TSC210x Touchscreen"
	#define X_AXIS_MAX 4000		+#define X_AXIS_MAX 4000
	#define X_AXIS_MIN 0		+#define X_AXIS_MIN 0
	#define Y_AXIS_MAX 4200		+#define Y_AXIS_MAX 4200
	#define Y_AXIS_MIN 100		+#define Y_AXIS_MIN 100
	#define PRESSURE_MIN 20		+#define PRESSURE_MIN 20
	#define PRESSURE_MAX 40000		+#define PRESSURE_MAX 40000
	#define FACTOR 5000		+#define FACTOR 5000
	</source>		</source>
	Send touch event to Android when the user release the touchscreen
			* Send touch event to Android when the user release the touchscreen:
	<source lang="c">		<source lang="c">
	static void tsc210x_touch(int touching)		static void tsc210x_touch(int touching)
	{		{
	if (!touching) {		if (!touching) {
	//input_report_abs(dev, ABS_X, 0);		- input_report_abs(dev, ABS_X, 0);
	//input_report_abs(dev, ABS_Y, 0);		- input_report_abs(dev, ABS_Y, 0);
	input_report_key(dev, BTN_TOUCH, 0);		+ input_report_key(dev, BTN_TOUCH, 0);
	input_report_abs(dev, ABS_PRESSURE, 0);		input_report_abs(dev, ABS_PRESSURE, 0);
	input_sync(dev);		input_sync(dev);
	}		}

	//input_report_key(dev, BTN_TOUCH, touching);		- input_report_key(dev, BTN_TOUCH, touching);
	//do_poke_blanked_console = 1;		-
			- do_poke_blanked_console = 1;
	}		}
	</source>		</source>
Line 190:		Line 193:
	/* Calculate the touch resistance a la equation #1 */		/* Calculate the touch resistance a la equation #1 */
	if (z1 != 0)		if (z1 != 0)
	p = x * (z2 - z1) / (z1 << 4) * FACTOR;		- p = x * (z2 - z1) / (z1 << 4);
			+ p = x * (z2 - z1) / (z1 << 4) * FACTOR;
	else		else
	p = 1;		p = 1;

	y = Y_AXIS_MAX - y;		+ y = Y_AXIS_MAX - y;
	input_report_key(dev, BTN_TOUCH, 1);		+ input_report_key(dev, BTN_TOUCH, 1);
	input_report_abs(dev, ABS_X, x);		input_report_abs(dev, ABS_X, x);
	input_report_abs(dev, ABS_Y, y);		input_report_abs(dev, ABS_Y, y);
Line 202:		Line 206:
	}		}
	</source>		</source>
	Calibrate the touchscreen with X and Y ranges
			* Calibrate the touchscreen with X and Y ranges
	<source lang="c">		<source lang="c">
	static int tsc210x_ts_probe(struct platform_device *pdev)		static int tsc210x_ts_probe(struct platform_device *pdev)
Line 213:		Line 218:

	status = tsc210x_touch_cb(tsc210x_touch);		status = tsc210x_touch_cb(tsc210x_touch);
	if (status)		if (status) {
	{
	goto error;		goto error;
	}		}

	status = tsc210x_coords_cb(tsc210x_coords);		status = tsc210x_coords_cb(tsc210x_coords);
	if (status)		if (status) {
	{
	goto error;		goto error;
	}		}
Line 229:		Line 232:
	dev->keybit[BIT_WORD(BTN_TOUCH)] \|= BIT_MASK(BTN_TOUCH);		dev->keybit[BIT_WORD(BTN_TOUCH)] \|= BIT_MASK(BTN_TOUCH);
	dev->absbit[0] = BIT_MASK(ABS_X) \| BIT_MASK(ABS_Y) \| BIT_MASK(ABS_PRESSURE);		dev->absbit[0] = BIT_MASK(ABS_X) \| BIT_MASK(ABS_Y) \| BIT_MASK(ABS_PRESSURE);
	input_set_abs_params(dev, ABS_X, X_AXIS_MIN, X_AXIS_MAX, 0, 0);		+ input_set_abs_params(dev, ABS_X, X_AXIS_MIN, X_AXIS_MAX, 0, 0);
	input_set_abs_params(dev, ABS_Y, Y_AXIS_MIN, Y_AXIS_MAX, 0, 0);		+ input_set_abs_params(dev, ABS_Y, Y_AXIS_MIN, Y_AXIS_MAX, 0, 0);
	input_set_abs_params(dev, ABS_PRESSURE, PRESSURE_MIN, PRESSURE_MAX, 0, 0);		+ input_set_abs_params(dev, ABS_PRESSURE, PRESSURE_MIN, PRESSURE_MAX, 0, 0);
	status = input_register_device(dev);		status = input_register_device(dev);
	if (status)		if (status) {
	{
	printk(KERN_INFO "Unable to register TSC210x as input device !\n");		printk(KERN_INFO "Unable to register TSC210x as input device !\n");
	goto error;		goto error;
Line 247:		Line 249:
	}		}
	</source>		</source>

	===Build Android kernel===		===Build Android kernel===
	* Compile the kernel and generate image kernel for U-Boot loader:		* Compile the kernel and generate image kernel for U-Boot loader:

JulienB: /* Battery patch */

2011-11-03T13:16:28Z

Battery patch

← Older revision		Revision as of 15:16, 3 November 2011
Line 258:		Line 258:
	==Android==		==Android==
	===Battery patch===		===Battery patch===
			{{Note\| I'm not sure the following changes for Battery are still needed if "Power class supply" is selected in Linux menuconfig (cf above) -- [[User:JulienB\|JulienB]] 13:16, 3 November 2011 (UTC)}}

	At the beginning, reboot happened over again even though Android logo appeared on board.		At the beginning, reboot happened over again even though Android logo appeared on board.
	Result of investigation, we found that battery power was returned with 0 when boot.. Then, we changed to notify full battery to Android by ignoring the information under ''/sys/class/power_supply'' so that to prevent the power down by low battery ''$ANDROID_SOURCE/frameworks/base/services/jni/com_android_server_BatteryService.cpp''		Result of investigation, we found that battery power was returned with 0 when boot.. Then, we changed to notify full battery to Android by ignoring the information under ''/sys/class/power_supply'' so that to prevent the power down by low battery ''$ANDROID_SOURCE/frameworks/base/services/jni/com_android_server_BatteryService.cpp''

JulienB: /* Touchscreen kernel configuration */

2011-11-03T13:09:17Z

Touchscreen kernel configuration

← Older revision		Revision as of 15:09, 3 November 2011
Line 116:		Line 116:
	</pre>		</pre>

	===~~Touchscreen kernel~~ configuration===		===Power management configuration===
	* Activate the wake lock for spi event reach to Android and include in the compiled kernel the touchscreen driver
	<pre class="config">		<pre class="config">
	Power management options --->		Power management options --->
Line 123:		Line 122:
	[*] Wake lock stats (NEW)		[*] Wake lock stats (NEW)
	[*] Userspace wake locks (NEW)		[*] Userspace wake locks (NEW)
	[*] Early suspend (NEW)		[*] Early suspend (NEW)
	User-space screen access (Console switch on early-suspend) --->		User-space screen access (Console switch on early-suspend) --->
	(X) Sysfs interface		(X) Sysfs interface
	~~...~~
			Device Drivers --->
			<*> Power supply class support --->
			</pre>

			===Touchscreen kernel configuration===
			* Activate the wake lock for spi event reach to Android and include in the compiled kernel the touchscreen driver
			<pre class="config">
	Device Drivers --->		Device Drivers --->
	Input device support --->		Input device support --->
Line 134:		Line 140:
	<*> Hardware Monitoring support --->		<*> Hardware Monitoring support --->
	</pre>		</pre>

	===Audio kernel configuration===		===Audio kernel configuration===
	* Include in the compiled kernel the audio driver		* Include in the compiled kernel the audio driver

JulienB: /* Android kernel configuration */

2011-11-03T13:07:11Z

Android kernel configuration

← Older revision		Revision as of 15:07, 3 November 2011
Line 83:		Line 83:
	===Android kernel configuration===		===Android kernel configuration===

	Then enable some Android specific configuration and make sure that your kernel still boots (with your standard file system).		* Then enable some Android specific configuration and make sure that your kernel still boots (with your standard file system):
	<pre class="host">		<pre class="host">
	$ cd $ANDROID_KERNEL		$ cd $ANDROID_KERNEL

JulienB: /* JFFS2 Root file system */

2011-11-03T10:35:03Z

JFFS2 Root file system

← Older revision		Revision as of 12:35, 3 November 2011
Line 483:		Line 483:

	===JFFS2 Root file system===		===JFFS2 Root file system===
	Actually, Android should use a filesystem that supports mmap() function like yaffs2, ext2 or ubifs. For our example we will use ~~ext2~~ on a microSD for data.		Actually, Android should use a filesystem that supports mmap() function like yaffs2, ext2/3 or ubifs. For our example we will use ext3 on a microSD for data.

	====Prepare the MMC/µSD card====		====Prepare the MMC/µSD card====
	We will create two partitions on our SD/microSD card, The first one will use for Android "memory card", the second one will be used for Android filesystem.		We will create two partitions on our SD/microSD card, The first one will use for Android "memory card", the second one will be used for Android filesystem.
Line 569:		Line 570:
	BIOS> setenv bootcmd run mmcboot		BIOS> setenv bootcmd run mmcboot
	BIOS> saveenv		BIOS> saveenv
			</pre>

			===NFS Boot===
			<pre class="apf">
			BIOS> setenv rootpath /local/export/android-eclair
			BIOS> setenv console console=ttySMX0,115200 init=/init
			BIOS> run nfsboot
	</pre>		</pre>

JulienB: /* Android start up */

2011-11-03T10:33:22Z

Android start up

← Older revision		Revision as of 12:33, 3 November 2011
Line 390:		Line 390:

	===Android start up===		===Android start up===
	Edit ''$ANDROID_SOURCE/system/core/rootdir/init.rc'', comment the '''mount roofs''' in read only mode and '''mount yaffs2''' lines like this:		Edit ''$ANDROID_SOURCE/system/core/rootdir/init.rc'', comment/remove/change the '''mount roofs''' in read only mode and '''mount yaffs2''' lines like this:
	<pre class="config">		<pre class="config">
	# setup the global environment		# setup the global environment

JulienB: /* Android start up */

2011-11-03T10:32:45Z

Android start up

← Older revision		Revision as of 12:32, 3 November 2011
Line 402:		Line 402:
	export BOOTCLASSPATH /system/framework/core.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/android.policy.jar:/system/framework/services.jar		export BOOTCLASSPATH /system/framework/core.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/android.policy.jar:/system/framework/services.jar

	mount rootfs rootfs / rw remount		+ mount rootfs rootfs / rw remount

	# Backward compatibility		# Backward compatibility
	symlink /system/etc /etc		symlink /system/etc /etc
			symlink /sys/kernel/debug /d

	# create mountpoints and mount tmpfs on sqlite_stmt_journals		# create mountpoints and mount tmpfs on sqlite_stmt_journals
Line 412:		Line 413:
	mkdir /data 0771 system system		mkdir /data 0771 system system
	mkdir /cache 0770 system cache		mkdir /cache 0770 system cache
			mkdir /config 0500 root root
	mkdir /sqlite_stmt_journals 01777 root root		mkdir /sqlite_stmt_journals 01777 root root
	mount tmpfs tmpfs /sqlite_stmt_journals size=4m		mount tmpfs tmpfs /sqlite_stmt_journals size=4m

	mount rootfs rootfs / ro remount		- mount rootfs rootfs / ro remount

	write /proc/sys/kernel/panic_on_oops 1		write /proc/sys/kernel/panic_on_oops 1
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	write /proc/sys/kernel/sched_latency_ns 10000000		write /proc/sys/kernel/sched_latency_ns 10000000
	write /proc/sys/kernel/sched_wakeup_granularity_ns 2000000		write /proc/sys/kernel/sched_wakeup_granularity_ns 2000000
			write /proc/sys/kernel/sched_compat_yield 1
			write /proc/sys/kernel/sched_child_runs_first 0

			...

	# mount mtd partitions		# mount mtd partitions
	# Mount the SD Card partition		# Mount /system rw first to give the filesystem a chance to save a checkpoint
	setprop EXTERNAL_STORAGE_STATE mounted		- mount yaffs2 mtd@system /system
	mount vfat /dev/block/mmcblk0p1 /sdcard nosuid nodev		- mount yaffs2 mtd@system /system ro remount
			+ # Mount the SD Card partition
			+ setprop EXTERNAL_STORAGE_STATE mounted
			+ mount vfat /dev/block/mmcblk0p1 /sdcard nosuid nodev

	# We chown/chmod /data again so because mount is run as root + defaults		# We chown/chmod /data again so because mount is run as root + defaults
	mount ~~ext2 /dev/block/mmcblk0p2~~ /data nosuid nodev		- mount yaffs2 mtd@userdata /data nosuid nodev
	chown system system /data		chown system system /data
	chmod 0771 /data		chmod 0771 /data

			...

	# Same reason as /data above		# Same reason as /data above
			- mount yaffs2 mtd@cache /cache nosuid nodev
	chown system cache /cache		chown system cache /cache
	chmod 0770 /cache		chmod 0770 /cache
Line 440:		Line 452:
	chown system system /cache/recovery		chown system system /cache/recovery
	chmod 0770 /cache/recovery		chmod 0770 /cache/recovery

			...
	</pre>		</pre>

JulienB: /* Boot setup */

2011-11-03T09:09:09Z

Boot setup

@@ Line 525: / Line 525: @@
 $ sudo mkfs.jffs2 -n -e 0x20000 --pad=0x700000 -r $ANDROID_SOURCE/rootfs -o $TFTPBOOT/apf27-rootfs.arm.jffs2
 </pre>
-The last thing left to do is to specify how the board boots Linux.<br>
-In the U-boot prompt, make the mmc boot is on second partition of the mmc/µSD card
+<pre class="host">
-<pre class="apf">
+$ cd $ANDROID_SOURCE/rootfs
-setenv addjffsargs 'setenv bootargs ${bootargs} root=/dev/mtdblock4 rootfstype=jffs2 init=/init'
+$ sudo mount /dev/sdb2 /media/mmc/
-setenv bootcmd run mmcboot
+$ sudo cp -a * /media/mmc/
-saveenv
+$ sudo umount /media/mmc/
 </pre>
 [[Image:Apf27_android.JPG‎]]

JulienB: /* Create the Android root filesystem for APF27 */

2011-11-03T08:53:58Z

Create the Android root filesystem for APF27

← Older revision		Revision as of 10:53, 3 November 2011
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	$ cp -a system/* $ANDROID_SOURCE/rootfs/system/		$ cp -a system/* $ANDROID_SOURCE/rootfs/system/
	$ cd $ANDROID_SOURCE/rootfs		$ cd $ANDROID_SOURCE/rootfs
	$ sudo chown -R root.root .		$ sudo chown -R root:root .
	$ sudo chmod -R a+~~rwX~~ data system		$ sudo chmod -R a+rwx data system
	</pre>		</pre>

JulienB: /* Prepare the MMC/µSD card */

2011-11-03T08:51:15Z

Prepare the MMC/µSD card

← Older revision		Revision as of 10:51, 3 November 2011
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	Last cylinder, +cylinders or +size{K,M,G} (1-239, default 239): +1G		Last cylinder, +cylinders or +size{K,M,G} (1-239, default 239): +1G
	</pre>		</pre>
	Change its type to FAT32:		* Change its type to FAT32:
	<pre class="host">		<pre class="host">
	Command (m for help): t		Command (m for help): t
Line 510:		Line 510:
	Changed system type of partition 1 to c (W95 FAT32 (LBA))		Changed system type of partition 1 to c (W95 FAT32 (LBA))
	</pre>		</pre>
	Using the n command again, create a second partition filling up the rest of your card (just accept default values).~~<br>~~		* Using the n command again, create a second primary partition filling up the rest of your card (just accept default values).
	~~Now, format the partitions in~~ your ~~card~~:		* Quit ''fdisk'' and save your changes:
	<pre class="host">		<pre class="host">
	~~sudo mkfs.vfat -n MemoryCard -F 32 /dev/sdb1~~		Command (m for help): w
	~~sudo mkfs.ext2 -L data /dev/sdb2~~
	</pre>		</pre>
			* Now, format the partitions in your card:
			<pre class="host">
			$ sudo mkfs.vfat -n MemoryCard -F 32 /dev/sdb1
			$ sudo mkfs.ext2 -L data /dev/sdb2
			</pre>

	====Boot setup====		====Boot setup====
	<pre class="host">		<pre class="host">