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Added gslx680-acpi sources module.

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0.2.1 (2016-04-28 onitake):
- Changed versioning scheme (2.0.0 becomes 0.2.0)
- Fixed DeviceTree support
- Added DKMS script
- Added module parameter for specifying firmware name
- Fixed cross compilation
- Improved wakeup pin control (ACPI/GPIO)
- Moved firmware and tools to https://github.com/onitake/gsl-firmware
- Improved handling of panel dimensions

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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MODULE_NAME = gslx680_ts_acpi
#CROSS_COMPILE ?= arm-linux-gnueabihf-
#ARCH ?= arm
ARCH := $(shell uname -m | sed -e s/i.86/i386/)
KVER := $(shell uname -r)
KSRC := /lib/modules/$(KVER)/build
PWD = $(shell pwd)
MODDESTDIR := /lib/modules/$(KVER)/kernel/drivers/input/touchscreen
obj-m += gslx680_ts_acpi.o
.PHONY: all modules clean
all: modules
modules:
make -C $(KSRC) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) M=$(PWD) modules
install:
install -p -m 644 $(MODULE_NAME).ko $(MODDESTDIR)
/sbin/depmod -a $(KVER)
uninstall:
rm -f $(MODDESTDIR)/$(MODULE_NAME).ko
/sbin/depmod -a $(KVER)
clean:
make -C $(KSRC) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) M=$(PWD) clean

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About
-----
This is a generic Linux kernel driver for the Silead GSLx68y
series of touch screen controllers.
It is currently designed to work on ACPI platforms, but
support for DeviceTree/OpenFirmware is also in the works.
The code was adapted from the platform specific driver here:
https://github.com/jabjoe/sunxi-gslx680
Kernel-based finger tracking is available and can be enabled if
the hardware doesn't support it. It works reasonably well,
but touches close to the edges are not registered reliably,
and dragging is very inaccurate.
Firmware Instructions
---------------------
The controller requires firmware to work properly. Firmware
images extracted from vendor drivers are maintained in a separate
repository: https://github.com/onitake/gsl-firmware
If your device is not mentioned yet, or the required silead_ts.fw
is not available, please post a request in the issue tracker there,
or consult [gsl-firmware/README.md](https://github.com/onitake/gsl-firmware/blob/master/README.md)
for information on how to obtain the firmware yourself.
Build Instructions
------------------
If you don't need to cross compile, just make sure you have headers
for your running Linux kernel installed, then type
make
This will produce gslx680_ts_acpi.ko
If you need to cross compile, pass appropriate KSRC, ARCH and
CROSS_COMPILE variables to the make command. For example:
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- KSRC=../linux-arm
CROSS_COMPILE is the compiler prefix (i.e. gcc will become
arm-linux-gnueabihf-gcc with CROSS_COMPILE=arm-linux-gnueabihf-), ARCH
is the target architecture as understood by the kernel (note: use i386
for 32 bit Intel platforms) and KSRC is the path to the target
kernel sources or kernel headers.
Install Instructions
--------------------
Install appropriate firmware for your device, as per the Firmware
Instructions above.
Load and test the driver with
insmod ./gslx680_ts_acpi.ko
Running dmesg should produce some output if the device was matched
by the driver. You should also see a message from the input
subsystem that a new input device was added.
You may then observe the output from evtest. X.org touchscreen input
should work too, but you will notice that the touch points are
off if the panel width and height were not set accurately.
This can be fixed by installing xinput_calibrator and using it to
generate a configuration file for your touchscreen. Some desktop
environments may offer their own touchscreen calibrator,
which you can also use.
xinput_calibrator, when run from an X terminal, will present a
series of points on the screen. Touch each of them when prompted,
then save the configuration printed to the terminal to the
indicated location.
After restarting X, you should have a working touchscreen.

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Device (TCS5)
{
Name (_ADR, Zero) // _ADR: Address
Name (_HID, "MSSL1680") // _HID: Hardware ID
Name (_CID, "PNP1680") // _CID: Compatible ID
Name (_S0W, Zero) // _S0W: S0 Device Wake State
Name (_DEP, Package (0x02) // _DEP: Dependencies
{
GPO1,
I2C5
})
Method (_PS3, 0, Serialized) // _PS3: Power State 3
{
If (LEqual (^^^GPO0.AVBL, One))
{
// TCON = Touchscreen On, SHUTDOWN pin, Deepsleep on low
Store (Zero, ^^^GPO0.TCON) /* \_SB_.GPO0.TCON */
}
}
Method (_PS0, 0, Serialized) // _PS0: Power State 0
{
If (LEqual (^^^GPO1.AVBL, One))
{
// TCD3 = Touchscreen 3.3V or 1.8V?, power gate? -> Power-on reset on low?
Store (Zero, ^^^GPO1.TCD3) /* \_SB_.GPO1.TCD3 */
}
Sleep (0x05)
If (LEqual (^^^GPO0.AVBL, One))
{
// TCON = Touchscreen On, SHUTDOWN pin, Wakeup on high
Store (One, ^^^GPO0.TCON) /* \_SB_.GPO0.TCON */
}
Sleep (0x1E)
If (LEqual (^^^GPO1.AVBL, One))
{
// TCD3 = Touchscreen 3.3V or 1.8V?, power gate? -> Reset complete on high?
Store (One, ^^^GPO1.TCD3) /* \_SB_.GPO1.TCD3 */
}
Sleep (0x78)
}
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
{
Name (RBUF, ResourceTemplate ()
{
// I2CSerialBusV2 ( SlaveAddress=_ADR , SlaveMode=_SLV , ConnectionSpeed=_SPE , AddressingMode=_MOD , ResourceSource ,
// ResourceSourceIndex , ResourceUsage , DescriptorName , Shared=_SHR, VendorData=_VEN )
// Interpretation: Device 0x40 (=64) on I2C controller \\_SB.I2C4, 7bit addressing, pure slave, 400kHz clock
I2cSerialBus (0x0040, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.I2C4",
0x00, ResourceConsumer, ,
)
// Interrupt (ResourceUsage, EdgeLevel=_HE, ActiveLevel=_LL, Shared=_SHR, ResourceSourceIndex,
// ResourceSource, DescriptorName) { InterruptList=_INT } => Buffer
// Interpretation: Maps to APIC Interrupt 0x44 (=70)
Interrupt (ResourceConsumer, Edge, ActiveHigh, Exclusive, ,, )
{
0x00000044,
}
// GpioIo ( Shared=_SHR, PinConfig=_PPI, DebounceTimeout=_DBT, DriveStrength=_DRS, IORestriction=_IOR, ResourceSource,
// ResourceSourceIndex, ResourceUsage, DescriptorName, VendorData=_VEN ) {PinList=_PIN}
// Interpretation: Output GPIO pin, controller \\_SB.GPO1, pin number 0x1a (=26)
GpioIo (Shared, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO1", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x001A
}
// Interpretation: Bidrectional GPIO pin, controller \\_SB.GPO1, pin number 0x03 (=3)
GpioIo (Shared, PullDefault, 0x0000, 0x0000, IoRestrictionNone,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0003
}
})
Return (RBUF) /* \_SB_.I2C4.TCS5._CRS.RBUF */
}
Method (_STA, 0, NotSerialized) // _STA: Status
{
If (LEqual (TPID, 0x04))
{
Return (0x0F)
}
Return (Zero)
}
}
Device (GPO0)
{
Name (_ADR, Zero) // _ADR: Address
Name (_HID, "INT33FC" /* Intel Baytrail GPIO Controller */) // _HID: Hardware ID
Name (_CID, "INT33FC" /* Intel Baytrail GPIO Controller */) // _CID: Compatible ID
Name (_DDN, "ValleyView General Purpose Input/Output (GPIO) controller") // _DDN: DOS Device Name
Name (_UID, One) // _UID: Unique ID
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
{
Name (RBUF, ResourceTemplate ()
{
Memory32Fixed (ReadWrite,
0xFED0C000, // Address Base
0x00001000, // Address Length
)
Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,, )
{
0x00000031,
}
})
Return (RBUF) /* \_SB_.GPO0._CRS.RBUF */
}
Method (_STA, 0, NotSerialized) // _STA: Status
{
Return (0x0F)
}
Name (AVBL, Zero)
Method (_REG, 2, NotSerialized) // _REG: Region Availability
{
If (LEqual (Arg0, 0x08))
{
Store (Arg1, AVBL) /* \_SB_.GPO0.AVBL */
}
}
OperationRegion (GPOP, GeneralPurposeIo, Zero, 0x0C)
Field (GPOP, ByteAcc, NoLock, Preserve)
{
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO0", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0002
}
),
CCU2, 1,
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO0", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0003
}
),
CCU3, 1,
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO0", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x005F
}
),
TCON, 1,
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO0", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0064
}
),
WWD3, 1
}
}
Device (GPO1)
{
Name (_ADR, Zero) // _ADR: Address
Name (_HID, "INT33FC" /* Intel Baytrail GPIO Controller */) // _HID: Hardware ID
Name (_CID, "INT33FC" /* Intel Baytrail GPIO Controller */) // _CID: Compatible ID
Name (_DDN, "ValleyView GPNCORE controller") // _DDN: DOS Device Name
Name (_UID, 0x02) // _UID: Unique ID
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
{
Name (RBUF, ResourceTemplate ()
{
Memory32Fixed (ReadWrite,
0xFED0D000, // Address Base
0x00001000, // Address Length
)
Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,, )
{
0x00000030,
}
})
Return (RBUF) /* \_SB_.GPO1._CRS.RBUF */
}
Name (AVBL, Zero)
Method (_REG, 2, NotSerialized) // _REG: Region Availability
{
If (LEqual (Arg0, 0x08))
{
Store (Arg1, AVBL) /* \_SB_.GPO1.AVBL */
}
}
OperationRegion (GPOP, GeneralPurposeIo, Zero, 0x0C)
Field (GPOP, ByteAcc, NoLock, Preserve)
{
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO1", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x000F
}
),
BST5, 1,
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO1", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x001A
}
),
TCD3, 1
}
Method (_STA, 0, NotSerialized) // _STA: Status
{
Return (0x0F)
}
}
Device (GPO2)
{
Name (_ADR, Zero) // _ADR: Address
Name (_HID, "INT33FC" /* Intel Baytrail GPIO Controller */) // _HID: Hardware ID
Name (_CID, "INT33FC" /* Intel Baytrail GPIO Controller */) // _CID: Compatible ID
Name (_DDN, "ValleyView GPSUS controller") // _DDN: DOS Device Name
Name (_UID, 0x03) // _UID: Unique ID
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
{
Name (RBUF, ResourceTemplate ()
{
Memory32Fixed (ReadWrite,
0xFED0E000, // Address Base
0x00001000, // Address Length
)
Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,, )
{
0x00000032,
}
})
Return (RBUF) /* \_SB_.GPO2._CRS.RBUF */
}
Method (_STA, 0, NotSerialized) // _STA: Status
{
Return (0x0F)
}
Method (_AEI, 0, NotSerialized) // _AEI: ACPI Event Interrupts
{
Name (RBUF, ResourceTemplate ()
{
GpioInt (Edge, ActiveLow, ExclusiveAndWake, PullUp, 0x0000,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0012
}
GpioInt (Edge, ActiveLow, ExclusiveAndWake, PullUp, 0x0000,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0002
}
GpioInt (Edge, ActiveBoth, ExclusiveAndWake, PullDefault, 0x0000,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0006
}
})
Name (FBUF, ResourceTemplate ()
{
GpioInt (Edge, ActiveBoth, SharedAndWake, PullUp, 0x0000,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0012
}
GpioInt (Edge, ActiveBoth, ExclusiveAndWake, PullDefault, 0x0000,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0006
}
})
Return (FBUF) /* \_SB_.GPO2._AEI.FBUF */
}
Name (BMUX, Buffer (0x03)
{
0x00, 0x01, 0x00 /* ... */
})
CreateByteField (BMUX, Zero, BBBY)
CreateByteField (BMUX, 0x02, DDDT)
Method (_E06, 0, NotSerialized) // _Exx: Edge-Triggered GPE
{
If (LNotEqual (LIDA, Zero))
{
Store (And (PVAL, One), LIDS) /* \LIDS */
^^PCI0.GFX0.GLID (LIDS)
Notify (LID0, 0x80) // Status Change
}
}
Method (_E12, 0, NotSerialized) // _Exx: Edge-Triggered GPE
{
If (LAnd (LEqual (AVBL, One), LEqual (^^GPO1.AVBL, One)))
{
If (LEqual (^^I2C5.AVBL, One))
{
If (LEqual (USID, One))
{
Store (Zero, ^^GPO1.BST5) /* \_SB_.GPO1.BST5 */
Sleep (0x05)
Store (^^I2C5.XP30, BMUX) /* \_SB_.GPO2.BMUX */
And (DDDT, 0x7F, DDDT) /* \_SB_.GPO2.DDDT */
Store (BMUX, ^^I2C5.XP30) /* \_SB_.I2C5.XP30 */
Store (One, MOTG) /* \_SB_.GPO2.MOTG */
^^PCI0.XHC1.PWOF ()
}
Else
{
Store (^^I2C5.XP30, BMUX) /* \_SB_.GPO2.BMUX */
Or (DDDT, 0x80, DDDT) /* \_SB_.GPO2.DDDT */
Store (BMUX, ^^I2C5.XP30) /* \_SB_.I2C5.XP30 */
Sleep (0x05)
Store (One, ^^GPO1.BST5) /* \_SB_.GPO1.BST5 */
Sleep (0x05)
Store (Zero, MOTG) /* \_SB_.GPO2.MOTG */
^^PCI0.XHC1.PWON ()
}
}
}
}
Name (BMBQ, Buffer (0x03)
{
0x00, 0x01, 0x00 /* ... */
})
CreateByteField (BMBQ, Zero, BBBQ)
CreateByteField (BMBQ, 0x02, DDBQ)
Method (BOST, 1, NotSerialized)
{
Store (^^I2C1.BQ01, BMBQ) /* \_SB_.GPO2.BMBQ */
If (LEqual (Arg0, One))
{
And (DDBQ, 0xCF, DDBQ) /* \_SB_.GPO2.DDBQ */
Or (DDBQ, 0x20, DDBQ) /* \_SB_.GPO2.DDBQ */
}
Else
{
And (DDBQ, 0xCF, DDBQ) /* \_SB_.GPO2.DDBQ */
Or (DDBQ, 0x10, DDBQ) /* \_SB_.GPO2.DDBQ */
}
Store (BMBQ, ^^I2C1.BQ01) /* \_SB_.I2C1.BQ01 */
}
Name (BUFC, Buffer (0x03)
{
0x00, 0x01, 0x00 /* ... */
})
CreateByteField (BUFC, Zero, BYAT)
CreateByteField (BUFC, 0x02, DATA)
Name (AVBL, Zero)
Method (_REG, 2, NotSerialized) // _REG: Region Availability
{
If (LEqual (Arg0, 0x08))
{
Store (Arg1, AVBL) /* \_SB_.GPO2.AVBL */
}
}
OperationRegion (GPOP, GeneralPurposeIo, Zero, 0x0C)
Field (GPOP, ByteAcc, NoLock, Preserve)
{
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0014
}
),
WFD3, 1,
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0001
}
),
MOTG, 1,
Connection (
GpioIo (Shared, PullDefault, 0x0000, 0x0000, IoRestrictionInputOnly,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0012
}
),
USID, 1
}
}

8
gslx680-acpi/dkms.conf Normal file
View File

@ -0,0 +1,8 @@
PACKAGE_NAME="gslx680-acpi"
PACKAGE_VERSION="0.2.1"
CLEAN="make clean"
MAKE="make all KVER=${kernelver} KSRC=/lib/modules/${kernelver}/build"
BUILT_MODULE_NAME="gslx680_ts_acpi"
DEST_MODULE_LOCATION="/updates"
AUTOINSTALL="yes"
REMAKE_INITRD="yes"

775
gslx680-acpi/gslx680_ts_acpi.c Normal file
View File

@ -0,0 +1,775 @@
/*
* Silead GSL1680/3680 touchscreen driver
*
* Copyright (c) 2015 Gregor Riepl <onitake@gmail.com>
*
* This driver is based on gslx680_ts.c and elan_ts.c
* Copyright (c) 2012 Shanghai Basewin
* Guan Yuwei<guanyuwei@basewin.com>
* Copyright (c) 2013 Joe Burmeister
* Joe Burmeister<joe.a.burmeister@googlemail.com>
* Copyright (C) 2014 Elan Microelectronics Corporation.
* Scott Liu <scott.liu@emc.com.tw>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/input/mt.h>
#include <linux/acpi.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/version.h>
/* Device and driver information */
#define DEVICE_NAME "gslx680"
#define DRIVER_VERSION "0.2.1"
/* Hardware API constants */
#define GSL_DATA_REG 0x80
#define GSL_STATUS_REG 0xe0
#define GSL_PAGE_REG 0xf0
#define GSL_TOUCH_STATUS_REG 0xbc
#define GSL_PAGE_SIZE 128
/* Why 126? */
#define GSL_MAX_READ 126
/* Actually 129: 1 command byte and 128 data bytes
* this was 125 originally - using 128 to allow firmware transfers
*/
#define GSL_MAX_WRITE 128
#define GSL_STATUS_FW 0x80
#define GSL_STATUS_TOUCH 0x00
#define GSL_PWR_GPIO "power"
#define GSL_MAX_CONTACTS 10
#define GSL_MAX_AXIS 0xfff
#define GSL_DMAX 0
#define GSL_JITTER 0
#define GSL_DEADZONE 0
#define GSL_PACKET_SIZE ( \
GSL_MAX_CONTACTS * sizeof(struct gsl_ts_packet_touch) + \
sizeof(struct gsl_ts_packet_header) \
)
#define GSL_FW_NAME_MAXLEN 32
#define GSL_FW_NAME_DEFAULT "silead_ts.fw"
#define GSL_FW_VERSION 1
#define GSL_FW_ID_LIT(a, b, c, d) ( \
((a) & 0xff) | \
(((b) & 0xff) << 8) | \
(((c) & 0xff) << 16) | \
(((d) & 0xff) << 24) \
)
#define GSL_FW_MAGIC GSL_FW_ID_LIT('G', 'S', 'L', 'X')
#define GSL_FW_MODEL_LIT(m) GSL_FW_ID_LIT( \
(m)/1000%10+'0', \
(m)/100%10+'0', \
(m)/10%10+'0', \
(m)%10+'0' \
)
#define GSL_FW_MODEL_1680 GSL_FW_MODEL_LIT(1680)
/* Module Parameters (optional) */
static char *gsl_fw_name = NULL;
module_param_named(fw_name, gsl_fw_name, charp, 0);
/* Driver state */
enum gsl_ts_state {
GSL_TS_INIT,
GSL_TS_SHUTDOWN,
GSL_TS_GREEN,
};
/* Driver instance data structure */
struct gsl_ts_data {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *gpio;
char fw_name[GSL_FW_NAME_MAXLEN];
enum gsl_ts_state state;
bool wake_irq_enabled;
unsigned int x_max;
unsigned int y_max;
unsigned int multi_touches;
bool x_reversed;
bool y_reversed;
bool xy_swapped;
bool soft_tracking;
int jitter;
int deadzone;
};
/* Firmware header */
struct gsl_ts_fw_header {
u32 magic;
u32 model;
u16 version;
u16 touches;
u16 width;
u16 height;
u8 swapped;
u8 xflipped;
u8 yflipped;
u8 tracking;
u32 pages;
} __packed;
/* Firmware data page */
struct gsl_ts_fw_page {
u16 address;
u16 size;
u8 data[128];
} __packed;
/* TODO use get_unaligned_le16 instead of packed structures */
/* Hardware touch event data header */
struct gsl_ts_packet_header {
u8 num_fingers;
u8 reserved;
u16 time_stamp; /* little-endian */
} __packed;
/* Hardware touch event data per finger */
struct gsl_ts_packet_touch {
u16 y_z; /* little endian, lower 12 bits = y, upper 4 bits = pressure (?) */
u16 x_id; /* little endian, lower 12 bits = x, upper 4 bits = id */
} __packed;
static int gsl_ts_init(struct gsl_ts_data *ts, const struct firmware *fw)
{
struct gsl_ts_fw_header *header;
u32 magic;
u16 version;
dev_dbg(&ts->client->dev, "%s: initialising driver state\n", __func__);
ts->wake_irq_enabled = false;
ts->state = GSL_TS_INIT;
if (fw->size < sizeof(struct gsl_ts_fw_header)) {
dev_err(&ts->client->dev, "%s: invalid firmware: file too small.\n", __func__);
return -EINVAL;
}
header = (struct gsl_ts_fw_header *) fw->data;
magic = le32_to_cpu(header->magic);
if (magic != GSL_FW_MAGIC) {
dev_err(&ts->client->dev, "%s: invalid firmware: invalid magic 0x%08x.\n", __func__, magic);
return -EINVAL;
}
version = le16_to_cpu(header->version);
if (version != GSL_FW_VERSION) {
dev_err(&ts->client->dev, "%s: invalid firmware: unsupported version %d.\n", __func__, version);
return -EINVAL;
}
ts->x_max = le16_to_cpu(header->width);
ts->y_max = le16_to_cpu(header->height);
ts->multi_touches = le16_to_cpu(header->touches);
if (ts->x_max == 0 || ts->y_max == 0 || ts->multi_touches == 0) {
dev_err(&ts->client->dev, "%s: invalid firmware: panel width, height or number of touch points is zero.\n", __func__);
return -EINVAL;
}
if (ts->x_max > GSL_MAX_AXIS || ts->y_max > GSL_MAX_AXIS || ts->multi_touches > GSL_MAX_CONTACTS) {
dev_err(&ts->client->dev, "%s: invalid firmware: maximum panel width, height or number of touch points exceeded.\n", __func__);
return -EINVAL;
}
ts->x_reversed = header->xflipped ? 1 : 0;
ts->y_reversed = header->yflipped ? 1 : 0;
ts->xy_swapped = header->swapped ? 1 : 0;
ts->soft_tracking = header->tracking ? 1 : 0;
ts->jitter = GSL_JITTER;
ts->deadzone = GSL_DEADZONE;
return 0;
}
static int gsl_ts_write(struct i2c_client *client, u8 reg, const u8 *pdata, int datalen)
{
u8 buf[GSL_PAGE_SIZE + 1];
unsigned int bytelen = 0;
if (datalen > GSL_MAX_WRITE) {
dev_err(&client->dev, "%s: data transfer too large (%d > %d)\n", __func__, datalen, GSL_MAX_WRITE);
return -EINVAL;
}
buf[0] = reg;
bytelen++;
if (datalen != 0 && pdata != NULL) {
memcpy(&buf[bytelen], pdata, datalen);
bytelen += datalen;
}
return i2c_master_send(client, buf, bytelen);
}
static int gsl_ts_read(struct i2c_client *client, u8 reg, u8 *pdata, unsigned int datalen)
{
int ret = 0;
if (datalen > GSL_MAX_READ) {
dev_err(&client->dev, "%s: data transfer too large (%d > %d)\n", __func__, datalen, GSL_MAX_READ);
return -EINVAL;
}
ret = gsl_ts_write(client, reg, NULL, 0);
if (ret < 0) {
dev_err(&client->dev, "%s: sending register location failed\n", __func__);
return ret;
}
return i2c_master_recv(client, pdata, datalen);
}
static int gsl_ts_startup_chip(struct i2c_client *client)
{
int rc;
u8 tmp = 0x00;
dev_dbg(&client->dev, "%s: starting up\n", __func__);
rc = gsl_ts_write(client, 0xe0, &tmp, 1);
usleep_range(10000, 20000);
return rc;
}
static int gsl_ts_reset_chip(struct i2c_client *client)
{
int rc;
u8 arg[4] = { 0x00, 0x00, 0x00, 0x00 };
dev_dbg(&client->dev, "%s: resetting\n", __func__);
arg[0] = 0x88;
rc = gsl_ts_write(client, 0xe0, arg, 1);
if (rc < 0) {
dev_err(&client->dev, "%s: gsl_ts_write 1 fail!\n", __func__);
return rc;
}
usleep_range(10000, 20000);
arg[0] = 0x04;
rc = gsl_ts_write(client, 0xe4, arg, 1);
if (rc < 0) {
dev_err(&client->dev, "%s: gsl_ts_write 2 fail!\n", __func__);
return rc;
}
usleep_range(10000, 20000);
arg[0] = 0x00;
rc = gsl_ts_write(client, 0xbc, arg, 4);
if (rc < 0) {
dev_err(&client->dev, "%s: gsl_ts_write 3 fail!\n", __func__);
return rc;
}
usleep_range(10000, 20000);
return 0;
}
static int gsl_ts_write_fw(struct gsl_ts_data *ts, const struct firmware *fw)
{
int rc = 0;
struct i2c_client *client = ts->client;
const struct gsl_ts_fw_header *header;
const struct gsl_ts_fw_page *page;
u32 pages, address;
u16 size;
size_t i;
dev_dbg(&client->dev, "%s: sending firmware\n", __func__);
header = (const struct gsl_ts_fw_header *) fw->data;
pages = le32_to_cpu(header->pages);
if (fw->size < sizeof(struct gsl_ts_fw_header) + pages * sizeof(struct gsl_ts_fw_page)) {
dev_err(&client->dev, "%s: firmware page data too small.\n", __func__);
return -EINVAL;
}
for (i = 0; rc >= 0 && i < pages; i++) {
page = (const struct gsl_ts_fw_page *) &fw->data[sizeof(struct gsl_ts_fw_header) + i * sizeof(struct gsl_ts_fw_page)];
/* The controller expects a little endian address */
address = cpu_to_le32(le16_to_cpu(page->address));
size = le16_to_cpu(page->size);
rc = gsl_ts_write(client, GSL_PAGE_REG, (u8 *) &address, sizeof(address));
if (rc < 0) {
dev_err(&client->dev, "%s: error setting page register. (page = 0x%x)\n", __func__, le32_to_cpu(address));
} else {
rc = gsl_ts_write(client, 0, page->data, size);
if (rc < 0) {
dev_err(&client->dev, "%s: error writing page data. (page = 0x%x)\n", __func__, le32_to_cpu(address));
}
}
}
if (rc < 0) {
return rc;
}
return 0;
}
static void gsl_ts_mt_event(struct gsl_ts_data *ts, u8 *buf)
{
int rc;
struct input_dev *input = ts->input;
struct device *dev = &ts->client->dev;
struct gsl_ts_packet_header *header;
struct gsl_ts_packet_touch *touch;
u8 i;
u16 touches, tseq, x, y, id, pressure;
struct input_mt_pos positions[GSL_MAX_CONTACTS];
int slots[GSL_MAX_CONTACTS];
header = (struct gsl_ts_packet_header *) buf;
touches = header->num_fingers;
tseq = le16_to_cpu(header->time_stamp);
/* time_stamp is 0 on zero-touch events, seems to wrap around 21800 */
dev_vdbg(dev, "%s: got touch events for %u fingers @%u\n", __func__, touches, tseq);
if (touches > GSL_MAX_CONTACTS) {
touches = GSL_MAX_CONTACTS;
}
for (i = 0; i < touches; i++) {
touch = (struct gsl_ts_packet_touch *) &buf[sizeof(*header) + i * sizeof(*touch)];
y = le16_to_cpu(touch->y_z);
x = le16_to_cpu(touch->x_id);
id = x >> 12;
x &= 0xfff;
pressure = y >> 12;
y &= 0xfff;
if (ts->xy_swapped) {
swap(x, y);
}
if (ts->x_reversed) {
x = ts->x_max - x;
}
if (ts->y_reversed) {
y = ts->y_max - y;
}
dev_vdbg(dev, "%s: touch event %u: x=%u y=%u id=0x%x p=%u\n", __func__, i, x, y, id, pressure);
positions[i].x = x;
positions[i].y = y;
if (!ts->soft_tracking) {
slots[i] = id;
}
}
if (ts->soft_tracking) {
/* This platform does not support finger tracking.
* Use the input core finger tracker instead.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
rc = input_mt_assign_slots(input, slots, positions, touches);
#else
rc = input_mt_assign_slots(input, slots, positions, touches, GSL_DMAX);
#endif
if (rc < 0) {
dev_err(dev, "%s: input_mt_assign_slots returned %d\n", __func__, rc);
return;
}
}
for (i = 0; i < touches; i++) {
input_mt_slot(input, slots[i]);
input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
input_report_abs(input, ABS_MT_POSITION_X, positions[i].x);
input_report_abs(input, ABS_MT_POSITION_Y, positions[i].y);
}
input_mt_sync_frame(input);
input_sync(input);
}
static irqreturn_t gsl_ts_irq(int irq, void *arg)
{
int rc;
struct gsl_ts_data *ts = (struct gsl_ts_data *) arg;
struct i2c_client *client = ts->client;
struct device *dev = &client->dev;
u8 status[4] = { 0, 0, 0, 0 };
u8 event[GSL_PACKET_SIZE];
dev_dbg(&client->dev, "%s: IRQ received\n", __func__);
if (ts->state == GSL_TS_SHUTDOWN) {
dev_warn(&client->dev, "%s: device supended, not handling interrupt\n", __func__);
return IRQ_HANDLED;
}
rc = gsl_ts_read(client, GSL_STATUS_REG, status, sizeof(status));
if (rc < 0) {
dev_err(dev, "%s: error reading chip status\n", __func__);
return IRQ_HANDLED;
}
if (status[0] == GSL_STATUS_FW) {
/* TODO: Send firmware here instead of during init */
dev_info(dev, "%s: device waiting for firmware\n", __func__);
} else if (status[0] == GSL_STATUS_TOUCH) {
dev_vdbg(dev, "%s: touch event\n", __func__);
rc = gsl_ts_read(client, GSL_DATA_REG, event, sizeof(event));
if (rc < 0) {
dev_err(dev, "%s: touch data read failed\n", __func__);
return IRQ_HANDLED;
}
if (event[0] == 0xff) {
dev_warn(dev, "%s: ignoring invalid touch record (0xff)\n", __func__);
return IRQ_HANDLED;
}
rc = gsl_ts_read(client, GSL_TOUCH_STATUS_REG, status, sizeof(status));
if (rc < 0) {
dev_err(dev, "%s: reading touch status register failed\n", __func__);
return IRQ_HANDLED;
}
if ((status[0] | status[1] | status[2] | status[3]) == 0) {
gsl_ts_mt_event(ts, event);
} else {
dev_warn(dev, "%s: device seems to be stuck, resetting\n", __func__);
rc = gsl_ts_reset_chip(ts->client);
if (rc < 0) {
dev_err(dev, "%s: reset_chip failed\n", __func__);
return IRQ_HANDLED;
}
rc = gsl_ts_startup_chip(ts->client);
if (rc < 0) {
dev_err(dev, "%s: startup_chip failed\n", __func__);
return IRQ_HANDLED;
}
}
} else {
dev_warn(&client->dev, "%s: IRQ received, unknown status 0x%02x\n", __func__, status[0]);
}
return IRQ_HANDLED;
}
static void gsl_ts_power(struct i2c_client *client, bool turnoff)
{
struct gsl_ts_data *data = i2c_get_clientdata(client);
#ifdef CONFIG_ACPI
int error;
#endif
if (data) {
if (data->gpio) {
gpiod_set_value_cansleep(data->gpio, turnoff ? 0 : 1);
#ifdef CONFIG_ACPI
} else {
error = acpi_bus_set_power(ACPI_HANDLE(&client->dev), turnoff ? ACPI_STATE_D3 : ACPI_STATE_D0);
if (error) {
dev_warn(&client->dev, "%s: error changing power state: %d\n", __func__, error);
}
#endif
}
usleep_range(20000, 50000);
}
}
static int gsl_ts_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct gsl_ts_data *ts;
const struct firmware *fw = NULL;
unsigned long irqflags;
int error;
bool acpipower;
dev_warn(&client->dev, "%s: got a device named %s at address 0x%x, IRQ %d, flags 0x%x\n", __func__, client->name, client->addr, client->irq, client->flags);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "%s: i2c check functionality error\n", __func__);
error = -ENXIO;
goto release;
}
if (client->irq <= 0) {
dev_err(&client->dev, "%s: missing IRQ configuration\n", __func__);
error = -ENODEV;
goto release;
}
ts = devm_kzalloc(&client->dev, sizeof(struct gsl_ts_data), GFP_KERNEL);
if (!ts) {
error = -ENOMEM;
goto release;
}
ts->client = client;
i2c_set_clientdata(client, ts);
if (gsl_fw_name != NULL) {
strncpy(ts->fw_name, gsl_fw_name, sizeof(ts->fw_name));
} else {
strncpy(ts->fw_name, GSL_FW_NAME_DEFAULT, sizeof(ts->fw_name));
}
error = request_firmware(&fw, ts->fw_name, &ts->client->dev);
if (error < 0) {
dev_err(&client->dev, "%s: failed to load firmware: %d\n", __func__, error);
goto release;
}
error = gsl_ts_init(ts, fw);
if (error < 0) {
dev_err(&client->dev, "%s: failed to initialize: %d\n", __func__, error);
goto release;
}
ts->input = devm_input_allocate_device(&client->dev);
if (!ts->input) {
dev_err(&client->dev, "%s: failed to allocate input device\n", __func__);
error = -ENOMEM;
goto release;
}
ts->input->name = "Silead GSLx680 Touchscreen";
ts->input->id.bustype = BUS_I2C;
ts->input->phys = "input/ts";
input_set_capability(ts->input, EV_ABS, ABS_X);
input_set_capability(ts->input, EV_ABS, ABS_Y);
input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->x_max, ts->jitter, ts->deadzone);
input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->y_max, ts->jitter, ts->deadzone);
input_mt_init_slots(ts->input, ts->multi_touches, INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK);
input_set_drvdata(ts->input, ts);
error = input_register_device(ts->input);
if (error) {
dev_err(&client->dev, "%s: unable to register input device: %d\n", __func__, error);
goto release;
}
/* Try to use ACPI power methods first */
acpipower = false;
#ifdef CONFIG_ACPI
if (ACPI_COMPANION(&client->dev)) {
/* Wake the device up with a power on reset */
if (acpi_bus_set_power(ACPI_HANDLE(&client->dev), ACPI_STATE_D3)) {
dev_warn(&client->dev, "%s: failed to wake up device through ACPI: %d, using GPIO controls instead\n", __func__, error);
} else {
acpipower = true;
}
}
#endif
/* Not available, use GPIO settings from DSDT/DT instead */
if (!acpipower) {
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
ts->gpio = devm_gpiod_get_index(&client->dev, GSL_PWR_GPIO, 0);
#else
ts->gpio = devm_gpiod_get_index(&client->dev, GSL_PWR_GPIO, 0, GPIOD_OUT_LOW);
#endif
if (IS_ERR(ts->gpio)) {
dev_err(&client->dev, "%s: error obtaining power pin GPIO resource\n", __func__);
error = PTR_ERR(ts->gpio);
goto release;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
error = gpiod_direction_output(ts->gpio, 0);
if (error < 0) {
dev_err(&client->dev, "%s: error setting GPIO pin direction\n", __func__);
goto release;
}
#endif
} else {
ts->gpio = NULL;
}
/* Enable power */
gsl_ts_power(client, false);
/* Execute the controller startup sequence */
error = gsl_ts_reset_chip(client);
if (error < 0) {
dev_err(&client->dev, "%s: chip reset failed\n", __func__);
goto release;
}
error = gsl_ts_write_fw(ts, fw);
if (error < 0) {
dev_err(&client->dev, "%s: firmware transfer failed\n", __func__);
goto release;
}
error = gsl_ts_startup_chip(client);
if (error < 0) {
dev_err(&client->dev, "%s: chip startup failed\n", __func__);
goto release;
}
/*
* Systems using device tree should set up interrupt via DTS,
* the rest will use the default falling edge interrupts.
*/
irqflags = client->dev.of_node ? 0 : IRQF_TRIGGER_FALLING;
/* Set up interrupt handler - do we still need to account for shared interrupts? */
error = devm_request_threaded_irq(
&client->dev,
client->irq,
NULL,
gsl_ts_irq,
irqflags | IRQF_ONESHOT,
client->name,
ts
);
if (error) {
dev_err(&client->dev, "%s: failed to register interrupt\n", __func__);
goto release;
}
/*
* Systems using device tree should set up wakeup via DTS,
* the rest will configure device as wakeup source by default.
*/
if (!client->dev.of_node) {
device_init_wakeup(&client->dev, true);
}
ts->state = GSL_TS_GREEN;
release:
if (fw) {
release_firmware(fw);
}
if (error < 0) {
return error;
}
return 0;
}
int gsl_ts_remove(struct i2c_client *client) {
/* Power the device off */
gsl_ts_power(client, true);
return 0;
}
static int __maybe_unused gsl_ts_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct gsl_ts_data *ts = i2c_get_clientdata(client);
dev_warn(&client->dev, "%s: suspending device\n", __func__);
disable_irq(client->irq);
gsl_ts_reset_chip(client);
usleep_range(10000, 20000);
gsl_ts_power(client, true);
if (device_may_wakeup(dev)) {
ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0);
}
ts->state = GSL_TS_SHUTDOWN;
return 0;
}
static int __maybe_unused gsl_ts_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct gsl_ts_data *ts = i2c_get_clientdata(client);
dev_warn(&client->dev, "%s: resuming device\n", __func__);
if (device_may_wakeup(dev) && ts->wake_irq_enabled) {
disable_irq_wake(client->irq);
}
gsl_ts_power(client, false);
gsl_ts_reset_chip(client);
gsl_ts_startup_chip(client);
enable_irq(client->irq);
ts->state = GSL_TS_GREEN;
return 0;
}
static const struct i2c_device_id gsl_ts_i2c_id[] = {
{ DEVICE_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, gsl_ts_i2c_id);
#ifdef CONFIG_PM
static SIMPLE_DEV_PM_OPS(gsl_ts_pm_ops, gsl_ts_suspend, gsl_ts_resume);
#endif
#ifdef CONFIG_ACPI
/* GSL3680 ACPI IDs are untested */
static const struct acpi_device_id gsl_ts_acpi_match[] = {
{ "MSSL1680", 0 },
{ "MSSL3680", 0 },
{ "PNP1680", 0 },
{ "PNP3680", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, gsl_ts_acpi_match);
#endif
#ifdef CONFIG_OF
/* These should work, but more testing is needed */
static const struct of_device_id gsl_ts_of_match[] = {
{ .compatible = "silead,gsl1680" },
{ .compatible = "silead,gsl3680" },
{ .compatible = "silead,gslx680" },
{ }
};
MODULE_DEVICE_TABLE(of, gsl_ts_of_match);
#endif
static struct i2c_driver gslx680_ts_driver = {
.probe = gsl_ts_probe,
.remove = gsl_ts_remove,
.id_table = gsl_ts_i2c_id,
.driver = {
.name = DEVICE_NAME,
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &gsl_ts_pm_ops,
#endif
#ifdef CONFIG_ACPI
.acpi_match_table = ACPI_PTR(gsl_ts_acpi_match),
#endif
#ifdef CONFIG_OF
.of_match_table = of_match_ptr(gsl_ts_of_match),
#endif
},
};
module_i2c_driver(gslx680_ts_driver);
MODULE_DESCRIPTION("GSLX680 touchscreen controller driver");
MODULE_AUTHOR("Gregor Riepl <onitake@gmail.com>");
MODULE_PARM_DESC(fw_name, "firmware file name (default: " GSL_FW_NAME_DEFAULT ")");
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");

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gslx680-acpi/silead_ts.fw Normal file
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