Commit 92944c1c authored by Dmitry Torokhov's avatar Dmitry Torokhov

Merge branch 'mrst-touchscreen' into next

Conflicts:
	drivers/input/touchscreen/Makefile
parents 77686517 d4f5f937
...@@ -260,6 +260,18 @@ config TOUCHSCREEN_INEXIO ...@@ -260,6 +260,18 @@ config TOUCHSCREEN_INEXIO
To compile this driver as a module, choose M here: the To compile this driver as a module, choose M here: the
module will be called inexio. module will be called inexio.
config TOUCHSCREEN_INTEL_MID
tristate "Intel MID platform resistive touchscreen"
depends on INTEL_SCU_IPC
help
Say Y here if you have a Intel MID based touchscreen in
your system.
If unsure, say N.
To compile this driver as a module, choose M here: the
module will be called intel_mid_touch.
config TOUCHSCREEN_MK712 config TOUCHSCREEN_MK712
tristate "ICS MicroClock MK712 touchscreen" tristate "ICS MicroClock MK712 touchscreen"
help help
......
...@@ -23,6 +23,7 @@ obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o ...@@ -23,6 +23,7 @@ obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o
obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o
obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o
obj-$(CONFIG_TOUCHSCREEN_INEXIO) += inexio.o obj-$(CONFIG_TOUCHSCREEN_INEXIO) += inexio.o
obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) += intel-mid-touch.o
obj-$(CONFIG_TOUCHSCREEN_LPC32XX) += lpc32xx_ts.o obj-$(CONFIG_TOUCHSCREEN_LPC32XX) += lpc32xx_ts.o
obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o
obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o
......
/* /*
* intel_mid_touch.c - Intel MID Resistive Touch Screen Driver * Intel MID Resistive Touch Screen Driver
* *
* Copyright (C) 2008 Intel Corp * Copyright (C) 2008 Intel Corp
* *
...@@ -15,7 +15,7 @@ ...@@ -15,7 +15,7 @@
* General Public License for more details. * General Public License for more details.
* *
* You should have received a copy of the GNU General Public License along * You should have received a copy of the GNU General Public License along
* with this program; ifnot, write to the Free Software Foundation, Inc., * with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
* *
* Questions/Comments/Bug fixes to Sreedhara (sreedhara.ds@intel.com) * Questions/Comments/Bug fixes to Sreedhara (sreedhara.ds@intel.com)
...@@ -23,11 +23,7 @@ ...@@ -23,11 +23,7 @@
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* *
* TODO: * TODO:
* kill off mrstouch_debug eventually
* review conversion of r/m/w sequences * review conversion of r/m/w sequences
* Replace interrupt mutex abuse
* Kill of mrstouchdevp pointer
*
*/ */
#include <linux/module.h> #include <linux/module.h>
...@@ -36,36 +32,25 @@ ...@@ -36,36 +32,25 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/param.h> #include <linux/param.h>
#include <linux/spi/spi.h> #include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/kthread.h>
#include <asm/intel_scu_ipc.h> #include <asm/intel_scu_ipc.h>
#if defined(MRSTOUCH_DEBUG)
#define mrstouch_debug(fmt, args...)\
do { \
printk(KERN_DEBUG "\n[MRSTOUCH(%d)] - ", __LINE__); \
printk(KERN_DEBUG fmt, ##args); \
} while (0);
#else
#define mrstouch_debug(fmt, args...)
#endif
/* PMIC Interrupt registers */ /* PMIC Interrupt registers */
#define PMIC_REG_ID1 0x00 /*PMIC ID1 register */ #define PMIC_REG_ID1 0x00 /* PMIC ID1 register */
/* PMIC Interrupt registers */ /* PMIC Interrupt registers */
#define PMIC_REG_INT 0x04 /*PMIC interrupt register */ #define PMIC_REG_INT 0x04 /* PMIC interrupt register */
#define PMIC_REG_MINT 0x05 /*PMIC interrupt mask register */ #define PMIC_REG_MINT 0x05 /* PMIC interrupt mask register */
/* ADC Interrupt registers */ /* ADC Interrupt registers */
#define PMIC_REG_ADCINT 0x5F /*ADC interrupt register */ #define PMIC_REG_ADCINT 0x5F /* ADC interrupt register */
#define PMIC_REG_MADCINT 0x60 /*ADC interrupt mask register */ #define PMIC_REG_MADCINT 0x60 /* ADC interrupt mask register */
/* ADC Control registers */ /* ADC Control registers */
#define PMIC_REG_ADCCNTL1 0x61 /*ADC control register */ #define PMIC_REG_ADCCNTL1 0x61 /* ADC control register */
/* ADC Channel Selection registers */ /* ADC Channel Selection registers */
#define PMICADDR0 0xA4 #define PMICADDR0 0xA4
...@@ -80,27 +65,23 @@ ...@@ -80,27 +65,23 @@
#define MRST_TS_CHAN12 0xC /* Touch screen Y+ connection */ #define MRST_TS_CHAN12 0xC /* Touch screen Y+ connection */
#define MRST_TS_CHAN13 0xD /* Touch screen Y- connection */ #define MRST_TS_CHAN13 0xD /* Touch screen Y- connection */
/* Touch screen coordinate constants */
#define TOUCH_PRESSURE 50
#define TOUCH_PRESSURE_FS 100
#define XMOVE_LIMIT 5
#define YMOVE_LIMIT 5
#define XYMOVE_CNT 3
#define MAX_10BIT ((1<<10)-1)
/* Touch screen channel BIAS constants */ /* Touch screen channel BIAS constants */
#define XBIAS 0x20 #define MRST_XBIAS 0x20
#define YBIAS 0x40 #define MRST_YBIAS 0x40
#define ZBIAS 0x80 #define MRST_ZBIAS 0x80
/* Touch screen coordinates */ /* Touch screen coordinates */
#define MIN_X 10 #define MRST_X_MIN 10
#define MAX_X 1024 #define MRST_X_MAX 1024
#define MIN_Y 10 #define MRST_X_FUZZ 5
#define MAX_Y 1024 #define MRST_Y_MIN 10
#define WAIT_ADC_COMPLETION 10 #define MRST_Y_MAX 1024
#define MRST_Y_FUZZ 5
#define MRST_PRESSURE_MIN 0
#define MRST_PRESSURE_NOMINAL 50
#define MRST_PRESSURE_MAX 100
#define WAIT_ADC_COMPLETION 10 /* msec */
/* PMIC ADC round robin delays */ /* PMIC ADC round robin delays */
#define ADC_LOOP_DELAY0 0x0 /* Continuous loop */ #define ADC_LOOP_DELAY0 0x0 /* Continuous loop */
...@@ -114,140 +95,45 @@ ...@@ -114,140 +95,45 @@
/* Touch screen device structure */ /* Touch screen device structure */
struct mrstouch_dev { struct mrstouch_dev {
struct spi_device *spi; /* SPI device associated with touch screen */ struct device *dev; /* device associated with touch screen */
struct input_dev *input; /* input device for touchscreen*/ struct input_dev *input;
char phys[32]; /* Device name */ char phys[32];
struct task_struct *pendet_thrd; /* PENDET interrupt handler */
struct mutex lock; /* Sync between interrupt and PENDET handler */
bool busy; /* Busy flag */
u16 asr; /* Address selection register */ u16 asr; /* Address selection register */
int irq; /* Touch screen IRQ # */ int irq;
uint vendor; /* PMIC vendor */ unsigned int vendor; /* PMIC vendor */
uint rev; /* PMIC revision */ unsigned int rev; /* PMIC revision */
bool suspended; /* Device suspended status */
bool disabled; /* Device disabled status */
u16 x; /* X coordinate */
u16 y; /* Y coordinate */
bool pendown; /* PEN position */
} ;
/* Global Pointer to Touch screen device */ int (*read_prepare)(struct mrstouch_dev *tsdev);
static struct mrstouch_dev *mrstouchdevp; int (*read)(struct mrstouch_dev *tsdev, u16 *x, u16 *y, u16 *z);
int (*read_finish)(struct mrstouch_dev *tsdev);
/* Utility to read PMIC ID */ };
static int mrstouch_pmic_id(uint *vendor, uint *rev)
{
int err;
u8 r;
err = intel_scu_ipc_ioread8(PMIC_REG_ID1, &r);
if (err)
return err;
*vendor = r & 0x7; /*************************** NEC and Maxim Interface ************************/
*rev = (r >> 3) & 0x7;
return 0; static int mrstouch_nec_adc_read_prepare(struct mrstouch_dev *tsdev)
{
return intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0, 0x20);
} }
/* /*
* Parse ADC channels to find end of the channel configured by other ADC user * Enables PENDET interrupt.
* NEC and MAXIM requires 4 channels and FreeScale needs 18 channels
*/ */
static int mrstouch_chan_parse(struct mrstouch_dev *tsdev) static int mrstouch_nec_adc_read_finish(struct mrstouch_dev *tsdev)
{
int err, i, j, found;
u32 r32;
found = -1;
for (i = 0; i < MRSTOUCH_MAX_CHANNELS; i++) {
if (found >= 0)
break;
err = intel_scu_ipc_ioread32(PMICADDR0, &r32);
if (err)
return err;
for (j = 0; j < 32; j+= 8) {
if (((r32 >> j) & 0xFF) == END_OF_CHANNEL) {
found = i;
break;
}
}
}
if (found < 0)
return 0;
if (tsdev->vendor == PMIC_VENDOR_FS) {
if (found && found > (MRSTOUCH_MAX_CHANNELS - 18))
return -ENOSPC;
} else {
if (found && found > (MRSTOUCH_MAX_CHANNELS - 4))
return -ENOSPC;
}
return found;
}
/* Utility to enable/disable pendet.
* pendet set to true enables PENDET interrupt
* pendet set to false disables PENDET interrupt
* Also clears RND mask bit
*/
static int pendet_enable(struct mrstouch_dev *tsdev, bool pendet)
{ {
u16 reg;
u8 r;
u8 pendet_enabled = 0;
int retry = 0;
int err; int err;
err = intel_scu_ipc_ioread16(PMIC_REG_MADCINT, &reg); err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x20, 0x20);
if (err) if (!err)
return err; err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, 0, 0x05);
if (pendet) {
reg &= ~0x0005;
reg |= 0x2000; /* Enable pendet */
} else
reg &= 0xDFFF; /* Disable pendet */
/* Set MADCINT and update ADCCNTL1 (next reg byte) */
err = intel_scu_ipc_iowrite16(PMIC_REG_MADCINT, reg);
if (!pendet || err)
return err; return err;
/*
* Sometimes even after the register write succeeds
* the PMIC register value is not updated. Retry few iterations
* to enable pendet.
*/
err = intel_scu_ipc_ioread8(PMIC_REG_ADCCNTL1, &r);
pendet_enabled = (r >> 5) & 0x01;
retry = 0;
while (!err && !pendet_enabled) {
retry++;
msleep(10);
err = intel_scu_ipc_iowrite8(PMIC_REG_ADCCNTL1, reg >> 8);
if (err)
break;
err = intel_scu_ipc_ioread8(PMIC_REG_ADCCNTL1, &r);
if (err == 0)
pendet_enabled = (r >> 5) & 0x01;
if (retry >= 10) {
dev_err(&tsdev->spi->dev, "Touch screen disabled.\n");
return -EIO;
}
}
return 0;
} }
/* To read PMIC ADC touch screen result /*
* Reads ADC storage registers for higher 7 and lower 3 bits * Reads PMIC ADC touch screen result
* converts the two readings to single value and turns off gain bit * Reads ADC storage registers for higher 7 and lower 3 bits and
* converts the two readings into a single value and turns off gain bit
*/ */
static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm) static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm)
{ {
...@@ -279,202 +165,93 @@ static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm) ...@@ -279,202 +165,93 @@ static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm)
return 0; return 0;
} }
/* To configure touch screen channels /*
* Writes touch screen channels to ADC address selection registers * Enables X, Y and Z bias values
* Enables YPYM for X channels and XPXM for Y channels
*/ */
static int mrstouch_ts_chan_set(uint offset) static int mrstouch_ts_bias_set(uint offset, uint bias)
{ {
int count; int count;
u16 chan; u16 chan, start;
u16 reg[5]; u16 reg[4];
u8 data[5]; u8 data[4];
chan = PMICADDR0 + offset; chan = PMICADDR0 + offset;
start = MRST_TS_CHAN10;
for (count = 0; count <= 3; count++) { for (count = 0; count <= 3; count++) {
reg[count] = chan++; reg[count] = chan++;
data[count] = MRST_TS_CHAN10 + count; data[count] = bias | (start + count);
}
reg[count] = chan;
data[count] = END_OF_CHANNEL;
return intel_scu_ipc_writev(reg, data, 5);
}
/* Initialize ADC */
static int mrstouch_adc_init(struct mrstouch_dev *tsdev)
{
int err, start;
u8 ra, rm;
err = mrstouch_pmic_id(&tsdev->vendor, &tsdev->rev);
if (err) {
dev_err(&tsdev->spi->dev, "Unable to read PMIC id\n");
return err;
}
start = mrstouch_chan_parse(tsdev);
if (start < 0) {
dev_err(&tsdev->spi->dev, "Unable to parse channels\n");
return start;
}
tsdev->asr = start;
mrstouch_debug("Channel offset(%d): 0x%X\n", tsdev->asr, tsdev->vendor);
/* ADC power on, start, enable PENDET and set loop delay
* ADC loop delay is set to 4.5 ms approximately
* Loop delay more than this results in jitter in adc readings
* Setting loop delay to 0 (continous loop) in MAXIM stops PENDET
* interrupt generation sometimes.
*/
if (tsdev->vendor == PMIC_VENDOR_FS) {
ra = 0xE0 | ADC_LOOP_DELAY0;
rm = 0x5;
} else {
/* NEC and MAXIm not consistent with loop delay 0 */
ra = 0xE0 | ADC_LOOP_DELAY1;
rm = 0x0;
/* configure touch screen channels */
err = mrstouch_ts_chan_set(tsdev->asr);
if (err)
return err;
}
err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, ra, 0xE7);
if (err == 0)
err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, rm, 0x03);
return err;
}
/* Reports x,y coordinates to event subsystem */
static void mrstouch_report_xy(struct mrstouch_dev *tsdev, u16 x, u16 y, u16 z)
{
int xdiff, ydiff;
if (tsdev->pendown && z <= TOUCH_PRESSURE) {
/* Pen removed, report button release */
mrstouch_debug("BTN REL(%d)", z);
input_report_key(tsdev->input, BTN_TOUCH, 0);
tsdev->pendown = false;
}
xdiff = abs(x - tsdev->x);
ydiff = abs(y - tsdev->y);
/*
if x and y values changes for XYMOVE_CNT readings it is considered
as stylus is moving. This is required to differentiate between stylus
movement and jitter
*/
if (x < MIN_X || x > MAX_X || y < MIN_Y || y > MAX_Y) {
/* Spurious values, release button if touched and return */
if (tsdev->pendown) {
mrstouch_debug("BTN REL(%d)", z);
input_report_key(tsdev->input, BTN_TOUCH, 0);
tsdev->pendown = false;
}
return;
} else if (xdiff >= XMOVE_LIMIT || ydiff >= YMOVE_LIMIT) {
tsdev->x = x;
tsdev->y = y;
input_report_abs(tsdev->input, ABS_X, x);
input_report_abs(tsdev->input, ABS_Y, y);
input_sync(tsdev->input);
} }
return intel_scu_ipc_writev(reg, data, 4);
if (!tsdev->pendown && z > TOUCH_PRESSURE) {
/* Pen touched, report button touch */
mrstouch_debug("BTN TCH(%d, %d, %d)", x, y, z);
input_report_key(tsdev->input, BTN_TOUCH, 1);
tsdev->pendown = true;
}
}
/* Utility to start ADC, used by freescale handler */
static int pendet_mask(void)
{
return intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x02, 0x02);
}
/* Utility to stop ADC, used by freescale handler */
static int pendet_umask(void)
{
return intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x00, 0x02);
} }
/* Utility to read ADC, used by freescale handler */ /* To read touch screen channel values */
static int mrstouch_pmic_fs_adc_read(struct mrstouch_dev *tsdev) static int mrstouch_nec_adc_read(struct mrstouch_dev *tsdev,
u16 *x, u16 *y, u16 *z)
{ {
int err; int err;
u16 x, y, z, result; u16 xm, ym, zm;
u16 reg[4];
u8 data[4];
result = PMIC_REG_ADCSNS0H + tsdev->asr; /* configure Y bias for X channels */
err = mrstouch_ts_bias_set(tsdev->asr, MRST_YBIAS);
if (err)
goto ipc_error;
reg[0] = result + 4; msleep(WAIT_ADC_COMPLETION);
reg[1] = result + 5;
reg[2] = result + 16;
reg[3] = result + 17;
err = intel_scu_ipc_readv(reg, data, 4); /* read x+ and x- channels */
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, x, &xm);
if (err) if (err)
goto ipc_error; goto ipc_error;
x = data[0] << 3; /* Higher 7 bits */ /* configure x bias for y channels */
x |= data[1] & 0x7; /* Lower 3 bits */ err = mrstouch_ts_bias_set(tsdev->asr, MRST_XBIAS);
x &= 0x3FF; if (err)
goto ipc_error;
y = data[2] << 3; /* Higher 7 bits */
y |= data[3] & 0x7; /* Lower 3 bits */
y &= 0x3FF;
/* Read Z value */ msleep(WAIT_ADC_COMPLETION);
reg[0] = result + 28;
reg[1] = result + 29;
err = intel_scu_ipc_readv(reg, data, 4); /* read y+ and y- channels */
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN12, y, &ym);
if (err) if (err)
goto ipc_error; goto ipc_error;
z = data[0] << 3; /* Higher 7 bits */ /* configure z bias for x and y channels */
z |= data[1] & 0x7; /* Lower 3 bits */ err = mrstouch_ts_bias_set(tsdev->asr, MRST_ZBIAS);
z &= 0x3FF; if (err)
goto ipc_error;
#if defined(MRSTOUCH_PRINT_XYZP) msleep(WAIT_ADC_COMPLETION);
mrstouch_debug("X: %d, Y: %d, Z: %d", x, y, z);
#endif
if (z >= TOUCH_PRESSURE_FS) { /* read z+ and z- channels */
mrstouch_report_xy(tsdev, x, y, TOUCH_PRESSURE - 1); /* Pen Removed */ err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, z, &zm);
return TOUCH_PRESSURE - 1; if (err)
} else { goto ipc_error;
mrstouch_report_xy(tsdev, x, y, TOUCH_PRESSURE + 1); /* Pen Touched */
return TOUCH_PRESSURE + 1;
}
return 0; return 0;
ipc_error: ipc_error:
dev_err(&tsdev->spi->dev, "ipc error during fs_adc read\n"); dev_err(tsdev->dev, "ipc error during adc read\n");
return err; return err;
} }
/* To handle free scale pmic pendet interrupt */
static int pmic0_pendet(void *dev_id) /*************************** Freescale Interface ************************/
static int mrstouch_fs_adc_read_prepare(struct mrstouch_dev *tsdev)
{ {
int err, count; int err, count;
u16 chan; u16 chan;
unsigned int touched;
struct mrstouch_dev *tsdev = (struct mrstouch_dev *)dev_id;
u16 reg[5]; u16 reg[5];
u8 data[5]; u8 data[5];
/* Stop the ADC */
err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x00, 0x02);
if (err)
goto ipc_error;
chan = PMICADDR0 + tsdev->asr; chan = PMICADDR0 + tsdev->asr;
/* Set X BIAS */ /* Set X BIAS */
...@@ -512,16 +289,65 @@ static int pmic0_pendet(void *dev_id) ...@@ -512,16 +289,65 @@ static int pmic0_pendet(void *dev_id)
msleep(WAIT_ADC_COMPLETION); msleep(WAIT_ADC_COMPLETION);
/*Read touch screen channels till pen removed return 0;
* Freescale reports constant value of z for all points
* z is high when screen is not touched and low when touched ipc_error:
* Map high z value to not touched and low z value to pen touched dev_err(tsdev->dev, "ipc error during %s\n", __func__);
*/ return err;
touched = mrstouch_pmic_fs_adc_read(tsdev); }
while (touched > TOUCH_PRESSURE) {
touched = mrstouch_pmic_fs_adc_read(tsdev); static int mrstouch_fs_adc_read(struct mrstouch_dev *tsdev,
msleep(WAIT_ADC_COMPLETION); u16 *x, u16 *y, u16 *z)
} {
int err;
u16 result;
u16 reg[4];
u8 data[4];
result = PMIC_REG_ADCSNS0H + tsdev->asr;
reg[0] = result + 4;
reg[1] = result + 5;
reg[2] = result + 16;
reg[3] = result + 17;
err = intel_scu_ipc_readv(reg, data, 4);
if (err)
goto ipc_error;
*x = data[0] << 3; /* Higher 7 bits */
*x |= data[1] & 0x7; /* Lower 3 bits */
*x &= 0x3FF;
*y = data[2] << 3; /* Higher 7 bits */
*y |= data[3] & 0x7; /* Lower 3 bits */
*y &= 0x3FF;
/* Read Z value */
reg[0] = result + 28;
reg[1] = result + 29;
err = intel_scu_ipc_readv(reg, data, 4);
if (err)
goto ipc_error;
*z = data[0] << 3; /* Higher 7 bits */
*z |= data[1] & 0x7; /* Lower 3 bits */
*z &= 0x3FF;
return 0;
ipc_error:
dev_err(tsdev->dev, "ipc error during %s\n", __func__);
return err;
}
static int mrstouch_fs_adc_read_finish(struct mrstouch_dev *tsdev)
{
int err, count;
u16 chan;
u16 reg[5];
u8 data[5];
/* Clear all TS channels */ /* Clear all TS channels */
chan = PMICADDR0 + tsdev->asr; chan = PMICADDR0 + tsdev->asr;
...@@ -545,319 +371,316 @@ static int pmic0_pendet(void *dev_id) ...@@ -545,319 +371,316 @@ static int pmic0_pendet(void *dev_id)
if (err) if (err)
goto ipc_error; goto ipc_error;
/* Start ADC */
err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x02, 0x02);
if (err)
goto ipc_error;
return 0; return 0;
ipc_error: ipc_error:
dev_err(&tsdev->spi->dev, "ipc error during pendet\n"); dev_err(tsdev->dev, "ipc error during %s\n", __func__);
return err; return err;
} }
static void mrstouch_report_event(struct input_dev *input,
/* To enable X, Y and Z bias values unsigned int x, unsigned int y, unsigned int z)
* Enables YPYM for X channels and XPXM for Y channels
*/
static int mrstouch_ts_bias_set(uint offset, uint bias)
{ {
int count; if (z > MRST_PRESSURE_NOMINAL) {
u16 chan, start; /* Pen touched, report button touch and coordinates */
u16 reg[4]; input_report_key(input, BTN_TOUCH, 1);
u8 data[4]; input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
chan = PMICADDR0 + offset; } else {
start = MRST_TS_CHAN10; input_report_key(input, BTN_TOUCH, 0);
for (count = 0; count <= 3; count++) {
reg[count] = chan++;
data[count] = bias | (start + count);
} }
return intel_scu_ipc_writev(reg, data, 4);
input_report_abs(input, ABS_PRESSURE, z);
input_sync(input);
} }
/* To read touch screen channel values */ /* PENDET interrupt handler */
static int mrstouch_adc_read(struct mrstouch_dev *tsdev) static irqreturn_t mrstouch_pendet_irq(int irq, void *dev_id)
{ {
int err; struct mrstouch_dev *tsdev = dev_id;
u16 xp, xm, yp, ym, zp, zm; u16 x, y, z;
/* configure Y bias for X channels */ /*
err = mrstouch_ts_bias_set(tsdev->asr, YBIAS); * Should we lower thread priority? Probably not, since we are
if (err) * not spinning but sleeping...
goto ipc_error; */
msleep(WAIT_ADC_COMPLETION); if (tsdev->read_prepare(tsdev))
goto out;
/* read x+ and x- channels */ do {
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, &xp, &xm); if (tsdev->read(tsdev, &x, &y, &z))
if (err) break;
goto ipc_error;
/* configure x bias for y channels */ mrstouch_report_event(tsdev->input, x, y, z);
err = mrstouch_ts_bias_set(tsdev->asr, XBIAS); } while (z > MRST_PRESSURE_NOMINAL);
if (err)
goto ipc_error;
msleep(WAIT_ADC_COMPLETION); tsdev->read_finish(tsdev);
/* read y+ and y- channels */ out:
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN12, &yp, &ym); return IRQ_HANDLED;
if (err) }
goto ipc_error;
/* configure z bias for x and y channels */
err = mrstouch_ts_bias_set(tsdev->asr, ZBIAS);
if (err)
goto ipc_error;
msleep(WAIT_ADC_COMPLETION); /* Utility to read PMIC ID */
static int __devinit mrstouch_read_pmic_id(uint *vendor, uint *rev)
{
int err;
u8 r;
/* read z+ and z- channels */ err = intel_scu_ipc_ioread8(PMIC_REG_ID1, &r);
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, &zp, &zm);
if (err) if (err)
goto ipc_error;
#if defined(MRSTOUCH_PRINT_XYZP)
printk(KERN_INFO "X+: %d, Y+: %d, Z+: %d\n", xp, yp, zp);
#endif
#if defined(MRSTOUCH_PRINT_XYZM)
printk(KERN_INFO "X-: %d, Y-: %d, Z-: %d\n", xm, ym, zm);
#endif
mrstouch_report_xy(tsdev, xp, yp, zp); /* report x and y to eventX */
return zp;
ipc_error:
dev_err(&tsdev->spi->dev, "ipc error during adc read\n");
return err; return err;
}
/* PENDET interrupt handler function for NEC and MAXIM */ *vendor = r & 0x7;
static void pmic12_pendet(void *data) *rev = (r >> 3) & 0x7;
{
unsigned int touched;
struct mrstouch_dev *tsdev = (struct mrstouch_dev *)data;
/* read touch screen channels till pen removed */ return 0;
do {
touched = mrstouch_adc_read(tsdev);
} while (touched > TOUCH_PRESSURE);
} }
/* Handler to process PENDET interrupt */ /*
int mrstouch_pendet(void *data) * Parse ADC channels to find end of the channel configured by other ADC user
* NEC and MAXIM requires 4 channels and FreeScale needs 18 channels
*/
static int __devinit mrstouch_chan_parse(struct mrstouch_dev *tsdev)
{ {
struct mrstouch_dev *tsdev = (struct mrstouch_dev *)data; int err, i, found;
while (1) { u8 r8;
/* Wait for PENDET interrupt */
if (mutex_lock_interruptible(&tsdev->lock)) {
msleep(WAIT_ADC_COMPLETION);
continue;
}
if (tsdev->busy)
return 0;
tsdev->busy = true; found = -1;
if (tsdev->vendor == PMIC_VENDOR_NEC || for (i = 0; i < MRSTOUCH_MAX_CHANNELS; i++) {
tsdev->vendor == PMIC_VENDOR_MAXIM) { if (found >= 0)
/* PENDET must be disabled in NEC before reading ADC */ break;
pendet_enable(tsdev,false); /* Disbale PENDET */
pmic12_pendet(tsdev);
pendet_enable(tsdev, true); /*Enable PENDET */
} else if (tsdev->vendor == PMIC_VENDOR_FS) {
pendet_umask(); /* Stop ADC */
pmic0_pendet(tsdev);
pendet_mask(); /* Stop ADC */
} else
dev_err(&tsdev->spi->dev, "Unsupported touchscreen: %d\n",
tsdev->vendor);
tsdev->busy = false; err = intel_scu_ipc_ioread8(PMICADDR0 + i, &r8);
if (err)
return err;
if (r8 == END_OF_CHANNEL) {
found = i;
break;
}
} }
if (found < 0)
return 0; return 0;
if (tsdev->vendor == PMIC_VENDOR_FS) {
if (found && found > (MRSTOUCH_MAX_CHANNELS - 18))
return -ENOSPC;
} else {
if (found && found > (MRSTOUCH_MAX_CHANNELS - 4))
return -ENOSPC;
}
return found;
} }
/* PENDET interrupt handler */
static irqreturn_t pendet_intr_handler(int irq, void *handle) /*
* Writes touch screen channels to ADC address selection registers
*/
static int __devinit mrstouch_ts_chan_set(uint offset)
{ {
struct mrstouch_dev *tsdev = (struct mrstouch_dev *)handle; u16 chan;
mutex_unlock(&tsdev->lock); int ret, count;
return IRQ_HANDLED;
chan = PMICADDR0 + offset;
for (count = 0; count <= 3; count++) {
ret = intel_scu_ipc_iowrite8(chan++, MRST_TS_CHAN10 + count);
if (ret)
return ret;
}
return intel_scu_ipc_iowrite8(chan++, END_OF_CHANNEL);
} }
/* Intializes input device and registers with input subsystem */ /* Initialize ADC */
static int ts_input_dev_init(struct mrstouch_dev *tsdev, struct spi_device *spi) static int __devinit mrstouch_adc_init(struct mrstouch_dev *tsdev)
{ {
int err = 0; int err, start;
u8 ra, rm;
mrstouch_debug("%s", __func__); err = mrstouch_read_pmic_id(&tsdev->vendor, &tsdev->rev);
if (err) {
dev_err(tsdev->dev, "Unable to read PMIC id\n");
return err;
}
tsdev->input = input_allocate_device(); switch (tsdev->vendor) {
if (!tsdev->input) { case PMIC_VENDOR_NEC:
dev_err(&tsdev->spi->dev, "Unable to allocate input device.\n"); case PMIC_VENDOR_MAXIM:
return -EINVAL; tsdev->read_prepare = mrstouch_nec_adc_read_prepare;
tsdev->read = mrstouch_nec_adc_read;
tsdev->read_finish = mrstouch_nec_adc_read_finish;
break;
case PMIC_VENDOR_FS:
tsdev->read_prepare = mrstouch_fs_adc_read_prepare;
tsdev->read = mrstouch_fs_adc_read;
tsdev->read_finish = mrstouch_fs_adc_read_finish;
break;
default:
dev_err(tsdev->dev,
"Unsupported touchscreen: %d\n", tsdev->vendor);
return -ENXIO;
} }
tsdev->input->name = "mrst_touchscreen"; start = mrstouch_chan_parse(tsdev);
snprintf(tsdev->phys, sizeof(tsdev->phys), if (start < 0) {
"%s/input0", dev_name(&spi->dev)); dev_err(tsdev->dev, "Unable to parse channels\n");
tsdev->input->phys = tsdev->phys; return start;
tsdev->input->dev.parent = &spi->dev; }
tsdev->input->id.vendor = tsdev->vendor; tsdev->asr = start;
tsdev->input->id.version = tsdev->rev;
tsdev->input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); /*
tsdev->input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); * ADC power on, start, enable PENDET and set loop delay
* ADC loop delay is set to 4.5 ms approximately
* Loop delay more than this results in jitter in adc readings
* Setting loop delay to 0 (continous loop) in MAXIM stops PENDET
* interrupt generation sometimes.
*/
input_set_abs_params(tsdev->input, ABS_X, MIN_X, MIN_Y, 0, 0); if (tsdev->vendor == PMIC_VENDOR_FS) {
input_set_abs_params(tsdev->input, ABS_Y, MIN_X, MIN_Y, 0, 0); ra = 0xE0 | ADC_LOOP_DELAY0;
rm = 0x5;
} else {
/* NEC and MAXIm not consistent with loop delay 0 */
ra = 0xE0 | ADC_LOOP_DELAY1;
rm = 0x0;
err = input_register_device(tsdev->input); /* configure touch screen channels */
if (err) { err = mrstouch_ts_chan_set(tsdev->asr);
dev_err(&tsdev->spi->dev, "unable to register input device\n"); if (err)
input_free_device(tsdev->input);
return err; return err;
} }
mrstouch_debug("%s", "mrstouch initialized"); err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, ra, 0xE7);
if (err)
return err;
return 0; err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, rm, 0x03);
if (err)
return err;
return 0;
} }
/* Probe function for touch screen driver */ /* Probe function for touch screen driver */
static int __devinit mrstouch_probe(struct spi_device *mrstouch_spi) static int __devinit mrstouch_probe(struct platform_device *pdev)
{ {
int err;
unsigned int myirq;
struct mrstouch_dev *tsdev; struct mrstouch_dev *tsdev;
struct input_dev *input;
int err;
int irq;
mrstouch_debug("%s(%p)", __func__, mrstouch_spi); irq = platform_get_irq(pdev, 0);
if (irq < 0) {
mrstouchdevp = NULL; dev_err(&pdev->dev, "no interrupt assigned\n");
myirq = mrstouch_spi->irq;
if (!mrstouch_spi->irq) {
dev_err(&mrstouch_spi->dev, "no interrupt assigned\n");
return -EINVAL; return -EINVAL;
} }
tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL); tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL);
if (!tsdev) { input = input_allocate_device();
dev_err(&mrstouch_spi->dev, "unable to allocate memory\n"); if (!tsdev || !input) {
return -ENOMEM; dev_err(&pdev->dev, "unable to allocate memory\n");
err = -ENOMEM;
goto err_free_mem;
} }
tsdev->irq = myirq; tsdev->dev = &pdev->dev;
mrstouchdevp = tsdev; tsdev->input = input;
tsdev->irq = irq;
snprintf(tsdev->phys, sizeof(tsdev->phys),
"%s/input0", dev_name(tsdev->dev));
err = mrstouch_adc_init(tsdev); err = mrstouch_adc_init(tsdev);
if (err) { if (err) {
dev_err(&mrstouch_spi->dev, "ADC init failed\n"); dev_err(&pdev->dev, "ADC initialization failed\n");
goto mrstouch_err_free_mem; goto err_free_mem;
} }
dev_set_drvdata(&mrstouch_spi->dev, tsdev); input->name = "mrst_touchscreen";
tsdev->spi = mrstouch_spi; input->phys = tsdev->phys;
input->dev.parent = tsdev->dev;
err = ts_input_dev_init(tsdev, mrstouch_spi); input->id.vendor = tsdev->vendor;
if (err) { input->id.version = tsdev->rev;
dev_err(&tsdev->spi->dev, "ts_input_dev_init failed");
goto mrstouch_err_free_mem; input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
} input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
mutex_init(&tsdev->lock); input_set_abs_params(tsdev->input, ABS_X,
mutex_lock(&tsdev->lock) MRST_X_MIN, MRST_X_MAX, MRST_X_FUZZ, 0);
input_set_abs_params(tsdev->input, ABS_Y,
MRST_Y_MIN, MRST_Y_MAX, MRST_Y_FUZZ, 0);
input_set_abs_params(tsdev->input, ABS_PRESSURE,
MRST_PRESSURE_MIN, MRST_PRESSURE_MAX, 0, 0);
mrstouch_debug("Requesting IRQ-%d", myirq); err = request_threaded_irq(tsdev->irq, NULL, mrstouch_pendet_irq,
err = request_irq(myirq, pendet_intr_handler,
0, "mrstouch", tsdev); 0, "mrstouch", tsdev);
if (err) { if (err) {
dev_err(&tsdev->spi->dev, "unable to allocate irq\n"); dev_err(tsdev->dev, "unable to allocate irq\n");
goto mrstouch_err_free_mem; goto err_free_mem;
} }
tsdev->pendet_thrd = kthread_run(mrstouch_pendet, err = input_register_device(tsdev->input);
(void *)tsdev, "pendet handler"); if (err) {
if (IS_ERR(tsdev->pendet_thrd)) { dev_err(tsdev->dev, "unable to register input device\n");
dev_err(&tsdev->spi->dev, "kthread_run failed\n"); goto err_free_irq;
err = PTR_ERR(tsdev->pendet_thrd);
goto mrstouch_err_free_mem;
} }
mrstouch_debug("%s", "Driver initialized");
platform_set_drvdata(pdev, tsdev);
return 0; return 0;
mrstouch_err_free_mem: err_free_irq:
free_irq(tsdev->irq, tsdev);
err_free_mem:
input_free_device(input);
kfree(tsdev); kfree(tsdev);
return err; return err;
} }
static int mrstouch_suspend(struct spi_device *spi, pm_message_t msg) static int __devexit mrstouch_remove(struct platform_device *pdev)
{ {
mrstouch_debug("%s", __func__); struct mrstouch_dev *tsdev = platform_get_drvdata(pdev);
mrstouchdevp->suspended = 1;
return 0;
}
static int mrstouch_resume(struct spi_device *spi) free_irq(tsdev->irq, tsdev);
{ input_unregister_device(tsdev->input);
mrstouch_debug("%s", __func__); kfree(tsdev);
mrstouchdevp->suspended = 0;
return 0; platform_set_drvdata(pdev, NULL);
}
static int mrstouch_remove(struct spi_device *spi)
{
mrstouch_debug("%s", __func__);
free_irq(mrstouchdevp->irq, mrstouchdevp);
input_unregister_device(mrstouchdevp->input);
input_free_device(mrstouchdevp->input);
if (mrstouchdevp->pendet_thrd)
kthread_stop(mrstouchdevp->pendet_thrd);
kfree(mrstouchdevp);
return 0; return 0;
} }
static struct spi_driver mrstouch_driver = { static struct platform_driver mrstouch_driver = {
.driver = { .driver = {
.name = "pmic_touch", .name = "pmic_touch",
.bus = &spi_bus_type,
.owner = THIS_MODULE, .owner = THIS_MODULE,
}, },
.probe = mrstouch_probe, .probe = mrstouch_probe,
.suspend = mrstouch_suspend, .remove = __devexit_p(mrstouch_remove),
.resume = mrstouch_resume,
.remove = mrstouch_remove,
}; };
static int __init mrstouch_module_init(void) static int __init mrstouch_init(void)
{ {
int err; return platform_driver_register(&mrstouch_driver);
mrstouch_debug("%s", __func__);
err = spi_register_driver(&mrstouch_driver);
if (err) {
mrstouch_debug("%s(%d)", "SPI PENDET failed", err);
return -1;
}
return 0;
} }
module_init(mrstouch_init);
static void __exit mrstouch_module_exit(void) static void __exit mrstouch_exit(void)
{ {
mrstouch_debug("%s", __func__); platform_driver_unregister(&mrstouch_driver);
spi_unregister_driver(&mrstouch_driver);
return;
} }
module_exit(mrstouch_exit);
module_init(mrstouch_module_init);
module_exit(mrstouch_module_exit);
MODULE_AUTHOR("Sreedhara Murthy. D.S, sreedhara.ds@intel.com"); MODULE_AUTHOR("Sreedhara Murthy. D.S, sreedhara.ds@intel.com");
MODULE_DESCRIPTION("Intel Moorestown Resistive Touch Screen Driver"); MODULE_DESCRIPTION("Intel Moorestown Resistive Touch Screen Driver");
......
...@@ -141,8 +141,6 @@ source "drivers/staging/adis16255/Kconfig" ...@@ -141,8 +141,6 @@ source "drivers/staging/adis16255/Kconfig"
source "drivers/staging/xgifb/Kconfig" source "drivers/staging/xgifb/Kconfig"
source "drivers/staging/mrst-touchscreen/Kconfig"
source "drivers/staging/msm/Kconfig" source "drivers/staging/msm/Kconfig"
source "drivers/staging/lirc/Kconfig" source "drivers/staging/lirc/Kconfig"
......
...@@ -52,7 +52,6 @@ obj-$(CONFIG_CXT1E1) += cxt1e1/ ...@@ -52,7 +52,6 @@ obj-$(CONFIG_CXT1E1) += cxt1e1/
obj-$(CONFIG_TI_ST) += ti-st/ obj-$(CONFIG_TI_ST) += ti-st/
obj-$(CONFIG_ADIS16255) += adis16255/ obj-$(CONFIG_ADIS16255) += adis16255/
obj-$(CONFIG_FB_XGI) += xgifb/ obj-$(CONFIG_FB_XGI) += xgifb/
obj-$(CONFIG_TOUCHSCREEN_MRSTOUCH) += mrst-touchscreen/
obj-$(CONFIG_MSM_STAGING) += msm/ obj-$(CONFIG_MSM_STAGING) += msm/
obj-$(CONFIG_EASYCAP) += easycap/ obj-$(CONFIG_EASYCAP) += easycap/
obj-$(CONFIG_SOLO6X10) += solo6x10/ obj-$(CONFIG_SOLO6X10) += solo6x10/
......
config TOUCHSCREEN_INTEL_MID
tristate "Intel MID platform resistive touchscreen"
depends on INTEL_SCU_IPC
default y
help
Say Y here if you have a Intel MID based touchscreen
If unsure, say N.
obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) := intel_mid_touch.o
- Move the driver to not think it is SPI (requires fixing some of the SFI
and firmware side)
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