input: add MELFAS mms144 touchscreen driver

Hi,

2012년 12월 13일 목요일에 Nikolay Epifanov님이 작성:

This is an initial driver for MELFAS touchscreen chip mms144.

Signed-off-by Nikolay Epifanov <[email protected]>

---
I don't know whether single driver could be used for both mms114 and mms144.
Couldn't find datasheets for any of them.

The touch data process logic of this driver is almost same with it of mms114 driver and offset of many registers is also same. I think you can merge this to mms114 driver.

Thanks.

    There are two firmwares available under redistribution license from
    AOSP tree:
    for FPCB revisions 3.2 and 3.1. Not sure if those are Melfas original
    or modified by Samsung. (Just for reference: they are
    mms144_ts_rev3*.fw at
    https://android.googlesource.com/device/samsung/tuna/+/214d003a47e7fe2962df667c5d65bce92a21a40e/

    mux_fw_flash(bool) from platform data switches pins between
    I2C<->GPIO modes.

    Driver has been tested on Samsung Galaxy Nexus except suspend/resume.

    Applied on
    git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git
    <http://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git>
    branch next.

      drivers/input/touchscreen/Kconfig  |   14 +
      drivers/input/touchscreen/Makefile |    1 +
      drivers/input/touchscreen/mms144.c |  821
    ++++++++++++++++++++++++++++++++++++
      include/linux/i2c/mms144.h         |   34 ++
      4 files changed, 870 insertions(+)

    diff --git a/drivers/input/touchscreen/Kconfig
    b/drivers/input/touchscreen/Kconfig
    index b93b598..78d9cd3 100644
    --- a/drivers/input/touchscreen/Kconfig
    +++ b/drivers/input/touchscreen/Kconfig
    @@ -369,6 +369,20 @@ config TOUCHSCREEN_MMS114
               To compile this driver as a module, choose M here: the
               module will be called mms114.

    +config TOUCHSCREEN_MMS144
    +       tristate "MELFAS MMS144 touchscreen"
    +       depends on I2C
    +       help
    +         Say Y here if you have the MELFAS MMS144 touchscreen
    controller
    +         chip in your system.
    +         Such kind of chip can be found in Samsung Galaxy Nexus
    +         touchscreens.
    +
    +         If unsure, say N.
    +
    +         To compile this driver as a module, choose M here: the
    +         module will be called mms144.
    +
      config TOUCHSCREEN_MTOUCH
             tristate "MicroTouch serial touchscreens"
             select SERIO
    diff --git a/drivers/input/touchscreen/Makefile
    b/drivers/input/touchscreen/Makefile
    index 5f949c0..cfbe87c 100644
    --- a/drivers/input/touchscreen/Makefile
    +++ b/drivers/input/touchscreen/Makefile
    @@ -39,6 +39,7 @@ obj-$(CONFIG_TOUCHSCREEN_MC13783)     += mc13783_ts.o
      obj-$(CONFIG_TOUCHSCREEN_MCS5000)      += mcs5000_ts.o
      obj-$(CONFIG_TOUCHSCREEN_MIGOR)                += migor_ts.o
      obj-$(CONFIG_TOUCHSCREEN_MMS114)       += mms114.o
    +obj-$(CONFIG_TOUCHSCREEN_MMS144)       += mms144.o
      obj-$(CONFIG_TOUCHSCREEN_MTOUCH)       += mtouch.o
      obj-$(CONFIG_TOUCHSCREEN_MK712)                += mk712.o
      obj-$(CONFIG_TOUCHSCREEN_HP600)                += hp680_ts_input.o
    diff --git a/drivers/input/touchscreen/mms144.c
    b/drivers/input/touchscreen/mms144.c
    new file mode 100644
    index 0000000..3bb84d0
    --- /dev/null
    +++ b/drivers/input/touchscreen/mms144.c
    @@ -0,0 +1,821 @@
    +/*
    + * mms144.c - Touchscreen driver for Melfas MMS144 touch controllers
    + *
    + * Copyright (C) 2011 Google Inc.
    + * Author: Dima Zavin <[email protected]>
    + *         Simon Wilson <[email protected]>
    + * Copyright (C) 2012 Nikolay Epifanov <[email protected]>
    + *
    + * ISP reflashing code based on original code from Melfas.
    + *
    + * This program is free software; you can redistribute  it and/or
    modify it
    + * under  the terms of  the GNU General  Public License as
    published by the
    + * Free Software Foundation;  either version 2 of the  License, or
    (at your
    + * option) any later version.
    + *
    + */
    +
    +#include <linux/completion.h>
    +#include <linux/delay.h>
    +#include <linux/firmware.h>
    +#include <linux/gpio.h>
    +#include <linux/i2c.h>
    +#include <linux/i2c/mms144.h>
    +#include <linux/init.h>
    +#include <linux/input.h>
    +#include <linux/input/mt.h>
    +#include <linux/interrupt.h>
    +#include <linux/irq.h>
    +#include <linux/module.h>
    +#include <linux/mutex.h>
    +#include <linux/slab.h>
    +#include <linux/unaligned/le_struct.h>
    +
    +#define MAX_FINGERS            10
    +#define MAX_WIDTH              30
    +#define MAX_PRESSURE           255
    +#define FINGER_EVENT_SZ                6
    +
    +/* Registers */
    +#define MMS_MODE_CONTROL       0x01
    +#define MMS_XYRES_HI           0x02
    +#define MMS_XRES_LO            0x03
    +#define MMS_YRES_LO            0x04
    +
    +#define MMS_INPUT_EVENT_PKT_SZ 0x0F
    +#define MMS_INPUT_EVENT0       0x10
    +
    +#define MMS_TSP_REVISION       0xF0
    +#define MMS_HW_REVISION                0xF1
    +#define MMS_COMPAT_GROUP       0xF2
    +#define MMS_FW_VERSION         0xF3

Above registers are same with them of mms114 driver.