Merge branch 'mrst-touchscreen' into next
Conflicts: drivers/input/touchscreen/Makefile
This commit is contained in:
Dmitry Torokhov
commit
92944c1c94
|
|
@ -260,6 +260,18 @@ config TOUCHSCREEN_INEXIO
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|||
To compile this driver as a module, choose M here: the
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module will be called inexio.
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config TOUCHSCREEN_INTEL_MID
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tristate "Intel MID platform resistive touchscreen"
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depends on INTEL_SCU_IPC
|
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help
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Say Y here if you have a Intel MID based touchscreen in
|
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your system.
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If unsure, say N.
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||||
To compile this driver as a module, choose M here: the
|
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module will be called intel_mid_touch.
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config TOUCHSCREEN_MK712
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tristate "ICS MicroClock MK712 touchscreen"
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help
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|
|
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|||
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@ -23,6 +23,7 @@ obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o
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obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o
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obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o
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obj-$(CONFIG_TOUCHSCREEN_INEXIO) += inexio.o
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obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) += intel-mid-touch.o
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obj-$(CONFIG_TOUCHSCREEN_LPC32XX) += lpc32xx_ts.o
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obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o
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obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o
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|
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@ -0,0 +1,687 @@
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/*
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* Intel MID Resistive Touch Screen Driver
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*
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* Copyright (C) 2008 Intel Corp
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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||||
*
|
||||
* 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; version 2 of the License.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
||||
*
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||||
* Questions/Comments/Bug fixes to Sreedhara (sreedhara.ds@intel.com)
|
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* Ramesh Agarwal (ramesh.agarwal@intel.com)
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* TODO:
|
||||
* review conversion of r/m/w sequences
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/err.h>
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#include <linux/param.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/irq.h>
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#include <linux/delay.h>
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#include <asm/intel_scu_ipc.h>
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|
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/* PMIC Interrupt registers */
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#define PMIC_REG_ID1 0x00 /* PMIC ID1 register */
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/* PMIC Interrupt registers */
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#define PMIC_REG_INT 0x04 /* PMIC interrupt register */
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#define PMIC_REG_MINT 0x05 /* PMIC interrupt mask register */
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|
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/* ADC Interrupt registers */
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#define PMIC_REG_ADCINT 0x5F /* ADC interrupt register */
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#define PMIC_REG_MADCINT 0x60 /* ADC interrupt mask register */
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|
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/* ADC Control registers */
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#define PMIC_REG_ADCCNTL1 0x61 /* ADC control register */
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|
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/* ADC Channel Selection registers */
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#define PMICADDR0 0xA4
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#define END_OF_CHANNEL 0x1F
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/* ADC Result register */
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#define PMIC_REG_ADCSNS0H 0x64
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/* ADC channels for touch screen */
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#define MRST_TS_CHAN10 0xA /* Touch screen X+ connection */
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#define MRST_TS_CHAN11 0xB /* Touch screen X- connection */
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#define MRST_TS_CHAN12 0xC /* Touch screen Y+ connection */
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#define MRST_TS_CHAN13 0xD /* Touch screen Y- connection */
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/* Touch screen channel BIAS constants */
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#define MRST_XBIAS 0x20
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#define MRST_YBIAS 0x40
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#define MRST_ZBIAS 0x80
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/* Touch screen coordinates */
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#define MRST_X_MIN 10
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#define MRST_X_MAX 1024
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#define MRST_X_FUZZ 5
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#define MRST_Y_MIN 10
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#define MRST_Y_MAX 1024
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#define MRST_Y_FUZZ 5
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#define MRST_PRESSURE_MIN 0
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#define MRST_PRESSURE_NOMINAL 50
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#define MRST_PRESSURE_MAX 100
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#define WAIT_ADC_COMPLETION 10 /* msec */
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||||
|
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/* PMIC ADC round robin delays */
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#define ADC_LOOP_DELAY0 0x0 /* Continuous loop */
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#define ADC_LOOP_DELAY1 0x1 /* 4.5 ms approximate */
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||||
|
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/* PMIC Vendor Identifiers */
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#define PMIC_VENDOR_FS 0 /* PMIC vendor FreeScale */
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#define PMIC_VENDOR_MAXIM 1 /* PMIC vendor MAXIM */
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#define PMIC_VENDOR_NEC 2 /* PMIC vendor NEC */
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#define MRSTOUCH_MAX_CHANNELS 32 /* Maximum ADC channels */
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/* Touch screen device structure */
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struct mrstouch_dev {
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struct device *dev; /* device associated with touch screen */
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struct input_dev *input;
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||||
char phys[32];
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u16 asr; /* Address selection register */
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||||
int irq;
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||||
unsigned int vendor; /* PMIC vendor */
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unsigned int rev; /* PMIC revision */
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int (*read_prepare)(struct mrstouch_dev *tsdev);
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int (*read)(struct mrstouch_dev *tsdev, u16 *x, u16 *y, u16 *z);
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||||
int (*read_finish)(struct mrstouch_dev *tsdev);
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||||
};
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||||
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/*************************** NEC and Maxim Interface ************************/
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static int mrstouch_nec_adc_read_prepare(struct mrstouch_dev *tsdev)
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{
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return intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0, 0x20);
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}
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|
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/*
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* Enables PENDET interrupt.
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*/
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static int mrstouch_nec_adc_read_finish(struct mrstouch_dev *tsdev)
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{
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int err;
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err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x20, 0x20);
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if (!err)
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||||
err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, 0, 0x05);
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return err;
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||||
}
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||||
|
||||
/*
|
||||
* Reads PMIC ADC touch screen result
|
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* 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
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||||
*/
|
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static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm)
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||||
{
|
||||
int err;
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||||
u16 result;
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||||
u32 res;
|
||||
|
||||
result = PMIC_REG_ADCSNS0H + offset;
|
||||
|
||||
if (chan == MRST_TS_CHAN12)
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result += 4;
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||||
|
||||
err = intel_scu_ipc_ioread32(result, &res);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* Mash the bits up */
|
||||
|
||||
*vp = (res & 0xFF) << 3; /* Highest 7 bits */
|
||||
*vp |= (res >> 8) & 0x07; /* Lower 3 bits */
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||||
*vp &= 0x3FF;
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||||
|
||||
res >>= 16;
|
||||
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||||
*vm = (res & 0xFF) << 3; /* Highest 7 bits */
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||||
*vm |= (res >> 8) & 0x07; /* Lower 3 bits */
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*vm &= 0x3FF;
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return 0;
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||||
}
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||||
|
||||
/*
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* Enables X, Y and Z bias values
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||||
* Enables YPYM for X channels and XPXM for Y channels
|
||||
*/
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static int mrstouch_ts_bias_set(uint offset, uint bias)
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{
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int count;
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u16 chan, start;
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u16 reg[4];
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u8 data[4];
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||||
|
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chan = PMICADDR0 + offset;
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start = MRST_TS_CHAN10;
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for (count = 0; count <= 3; count++) {
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reg[count] = chan++;
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data[count] = bias | (start + count);
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||||
}
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||||
|
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return intel_scu_ipc_writev(reg, data, 4);
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}
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|
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/* To read touch screen channel values */
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static int mrstouch_nec_adc_read(struct mrstouch_dev *tsdev,
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u16 *x, u16 *y, u16 *z)
|
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{
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int err;
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u16 xm, ym, zm;
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/* configure Y bias for X channels */
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err = mrstouch_ts_bias_set(tsdev->asr, MRST_YBIAS);
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if (err)
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goto ipc_error;
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||||
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msleep(WAIT_ADC_COMPLETION);
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/* read x+ and x- channels */
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err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, x, &xm);
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if (err)
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goto ipc_error;
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/* configure x bias for y channels */
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err = mrstouch_ts_bias_set(tsdev->asr, MRST_XBIAS);
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if (err)
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goto ipc_error;
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|
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msleep(WAIT_ADC_COMPLETION);
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|
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/* read y+ and y- channels */
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err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN12, y, &ym);
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if (err)
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goto ipc_error;
|
||||
|
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/* configure z bias for x and y channels */
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err = mrstouch_ts_bias_set(tsdev->asr, MRST_ZBIAS);
|
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if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
/* read z+ and z- channels */
|
||||
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, z, &zm);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
return 0;
|
||||
|
||||
ipc_error:
|
||||
dev_err(tsdev->dev, "ipc error during adc read\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
/*************************** Freescale Interface ************************/
|
||||
|
||||
static int mrstouch_fs_adc_read_prepare(struct mrstouch_dev *tsdev)
|
||||
{
|
||||
int err, count;
|
||||
u16 chan;
|
||||
u16 reg[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;
|
||||
|
||||
/* Set X BIAS */
|
||||
for (count = 0; count <= 3; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = 0x2A;
|
||||
}
|
||||
reg[count] = chan++; /* Dummy */
|
||||
data[count] = 0;
|
||||
|
||||
err = intel_scu_ipc_writev(reg, data, 5);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
/* Set Y BIAS */
|
||||
for (count = 0; count <= 3; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = 0x4A;
|
||||
}
|
||||
reg[count] = chan++; /* Dummy */
|
||||
data[count] = 0;
|
||||
|
||||
err = intel_scu_ipc_writev(reg, data, 5);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
/* Set Z BIAS */
|
||||
err = intel_scu_ipc_iowrite32(chan + 2, 0x8A8A8A8A);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
return 0;
|
||||
|
||||
ipc_error:
|
||||
dev_err(tsdev->dev, "ipc error during %s\n", __func__);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int mrstouch_fs_adc_read(struct mrstouch_dev *tsdev,
|
||||
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 */
|
||||
chan = PMICADDR0 + tsdev->asr;
|
||||
for (count = 0; count <= 4; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = 0;
|
||||
}
|
||||
err = intel_scu_ipc_writev(reg, data, 5);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
for (count = 0; count <= 4; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = 0;
|
||||
}
|
||||
err = intel_scu_ipc_writev(reg, data, 5);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
err = intel_scu_ipc_iowrite32(chan + 2, 0x00000000);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
/* Start ADC */
|
||||
err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x02, 0x02);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
return 0;
|
||||
|
||||
ipc_error:
|
||||
dev_err(tsdev->dev, "ipc error during %s\n", __func__);
|
||||
return err;
|
||||
}
|
||||
|
||||
static void mrstouch_report_event(struct input_dev *input,
|
||||
unsigned int x, unsigned int y, unsigned int z)
|
||||
{
|
||||
if (z > MRST_PRESSURE_NOMINAL) {
|
||||
/* Pen touched, report button touch and coordinates */
|
||||
input_report_key(input, BTN_TOUCH, 1);
|
||||
input_report_abs(input, ABS_X, x);
|
||||
input_report_abs(input, ABS_Y, y);
|
||||
} else {
|
||||
input_report_key(input, BTN_TOUCH, 0);
|
||||
}
|
||||
|
||||
input_report_abs(input, ABS_PRESSURE, z);
|
||||
input_sync(input);
|
||||
}
|
||||
|
||||
/* PENDET interrupt handler */
|
||||
static irqreturn_t mrstouch_pendet_irq(int irq, void *dev_id)
|
||||
{
|
||||
struct mrstouch_dev *tsdev = dev_id;
|
||||
u16 x, y, z;
|
||||
|
||||
/*
|
||||
* Should we lower thread priority? Probably not, since we are
|
||||
* not spinning but sleeping...
|
||||
*/
|
||||
|
||||
if (tsdev->read_prepare(tsdev))
|
||||
goto out;
|
||||
|
||||
do {
|
||||
if (tsdev->read(tsdev, &x, &y, &z))
|
||||
break;
|
||||
|
||||
mrstouch_report_event(tsdev->input, x, y, z);
|
||||
} while (z > MRST_PRESSURE_NOMINAL);
|
||||
|
||||
tsdev->read_finish(tsdev);
|
||||
|
||||
out:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/* Utility to read PMIC ID */
|
||||
static int __devinit mrstouch_read_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;
|
||||
*rev = (r >> 3) & 0x7;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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)
|
||||
{
|
||||
int err, i, found;
|
||||
u8 r8;
|
||||
|
||||
found = -1;
|
||||
|
||||
for (i = 0; i < MRSTOUCH_MAX_CHANNELS; i++) {
|
||||
if (found >= 0)
|
||||
break;
|
||||
|
||||
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;
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Writes touch screen channels to ADC address selection registers
|
||||
*/
|
||||
static int __devinit mrstouch_ts_chan_set(uint offset)
|
||||
{
|
||||
u16 chan;
|
||||
|
||||
int ret, count;
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
/* Initialize ADC */
|
||||
static int __devinit mrstouch_adc_init(struct mrstouch_dev *tsdev)
|
||||
{
|
||||
int err, start;
|
||||
u8 ra, rm;
|
||||
|
||||
err = mrstouch_read_pmic_id(&tsdev->vendor, &tsdev->rev);
|
||||
if (err) {
|
||||
dev_err(tsdev->dev, "Unable to read PMIC id\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
switch (tsdev->vendor) {
|
||||
case PMIC_VENDOR_NEC:
|
||||
case PMIC_VENDOR_MAXIM:
|
||||
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;
|
||||
}
|
||||
|
||||
start = mrstouch_chan_parse(tsdev);
|
||||
if (start < 0) {
|
||||
dev_err(tsdev->dev, "Unable to parse channels\n");
|
||||
return start;
|
||||
}
|
||||
|
||||
tsdev->asr = start;
|
||||
|
||||
/*
|
||||
* 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)
|
||||
return err;
|
||||
|
||||
err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, rm, 0x03);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* Probe function for touch screen driver */
|
||||
static int __devinit mrstouch_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct mrstouch_dev *tsdev;
|
||||
struct input_dev *input;
|
||||
int err;
|
||||
int irq;
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq < 0) {
|
||||
dev_err(&pdev->dev, "no interrupt assigned\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL);
|
||||
input = input_allocate_device();
|
||||
if (!tsdev || !input) {
|
||||
dev_err(&pdev->dev, "unable to allocate memory\n");
|
||||
err = -ENOMEM;
|
||||
goto err_free_mem;
|
||||
}
|
||||
|
||||
tsdev->dev = &pdev->dev;
|
||||
tsdev->input = input;
|
||||
tsdev->irq = irq;
|
||||
|
||||
snprintf(tsdev->phys, sizeof(tsdev->phys),
|
||||
"%s/input0", dev_name(tsdev->dev));
|
||||
|
||||
err = mrstouch_adc_init(tsdev);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "ADC initialization failed\n");
|
||||
goto err_free_mem;
|
||||
}
|
||||
|
||||
input->name = "mrst_touchscreen";
|
||||
input->phys = tsdev->phys;
|
||||
input->dev.parent = tsdev->dev;
|
||||
|
||||
input->id.vendor = tsdev->vendor;
|
||||
input->id.version = tsdev->rev;
|
||||
|
||||
input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
|
||||
input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
|
||||
|
||||
input_set_abs_params(tsdev->input, ABS_X,
|
||||
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);
|
||||
|
||||
err = request_threaded_irq(tsdev->irq, NULL, mrstouch_pendet_irq,
|
||||
0, "mrstouch", tsdev);
|
||||
if (err) {
|
||||
dev_err(tsdev->dev, "unable to allocate irq\n");
|
||||
goto err_free_mem;
|
||||
}
|
||||
|
||||
err = input_register_device(tsdev->input);
|
||||
if (err) {
|
||||
dev_err(tsdev->dev, "unable to register input device\n");
|
||||
goto err_free_irq;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, tsdev);
|
||||
return 0;
|
||||
|
||||
err_free_irq:
|
||||
free_irq(tsdev->irq, tsdev);
|
||||
err_free_mem:
|
||||
input_free_device(input);
|
||||
kfree(tsdev);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devexit mrstouch_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct mrstouch_dev *tsdev = platform_get_drvdata(pdev);
|
||||
|
||||
free_irq(tsdev->irq, tsdev);
|
||||
input_unregister_device(tsdev->input);
|
||||
kfree(tsdev);
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver mrstouch_driver = {
|
||||
.driver = {
|
||||
.name = "pmic_touch",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = mrstouch_probe,
|
||||
.remove = __devexit_p(mrstouch_remove),
|
||||
};
|
||||
|
||||
static int __init mrstouch_init(void)
|
||||
{
|
||||
return platform_driver_register(&mrstouch_driver);
|
||||
}
|
||||
module_init(mrstouch_init);
|
||||
|
||||
static void __exit mrstouch_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&mrstouch_driver);
|
||||
}
|
||||
module_exit(mrstouch_exit);
|
||||
|
||||
MODULE_AUTHOR("Sreedhara Murthy. D.S, sreedhara.ds@intel.com");
|
||||
MODULE_DESCRIPTION("Intel Moorestown Resistive Touch Screen Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -141,8 +141,6 @@ source "drivers/staging/adis16255/Kconfig"
|
|||
|
||||
source "drivers/staging/xgifb/Kconfig"
|
||||
|
||||
source "drivers/staging/mrst-touchscreen/Kconfig"
|
||||
|
||||
source "drivers/staging/msm/Kconfig"
|
||||
|
||||
source "drivers/staging/lirc/Kconfig"
|
||||
|
|
|
|||
|
|
@ -52,7 +52,6 @@ obj-$(CONFIG_CXT1E1) += cxt1e1/
|
|||
obj-$(CONFIG_TI_ST) += ti-st/
|
||||
obj-$(CONFIG_ADIS16255) += adis16255/
|
||||
obj-$(CONFIG_FB_XGI) += xgifb/
|
||||
obj-$(CONFIG_TOUCHSCREEN_MRSTOUCH) += mrst-touchscreen/
|
||||
obj-$(CONFIG_MSM_STAGING) += msm/
|
||||
obj-$(CONFIG_EASYCAP) += easycap/
|
||||
obj-$(CONFIG_SOLO6X10) += solo6x10/
|
||||
|
|
|
|||
|
|
@ -1,7 +0,0 @@
|
|||
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.
|
||||
|
|
@ -1,3 +0,0 @@
|
|||
obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) := intel_mid_touch.o
|
||||
|
||||
|
||||
|
|
@ -1,2 +0,0 @@
|
|||
- Move the driver to not think it is SPI (requires fixing some of the SFI
|
||||
and firmware side)
|
||||
|
|
@ -1,864 +0,0 @@
|
|||
/*
|
||||
* intel_mid_touch.c - Intel MID Resistive Touch Screen Driver
|
||||
*
|
||||
* Copyright (C) 2008 Intel Corp
|
||||
*
|
||||
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
*
|
||||
* 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; version 2 of the License.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; ifnot, write to the Free Software Foundation, Inc.,
|
||||
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
||||
*
|
||||
* Questions/Comments/Bug fixes to Sreedhara (sreedhara.ds@intel.com)
|
||||
* Ramesh Agarwal (ramesh.agarwal@intel.com)
|
||||
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
*
|
||||
* TODO:
|
||||
* kill off mrstouch_debug eventually
|
||||
* review conversion of r/m/w sequences
|
||||
* Replace interrupt mutex abuse
|
||||
* Kill of mrstouchdevp pointer
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/param.h>
|
||||
#include <linux/spi/spi.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/kthread.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 */
|
||||
#define PMIC_REG_ID1 0x00 /*PMIC ID1 register */
|
||||
|
||||
/* PMIC Interrupt registers */
|
||||
#define PMIC_REG_INT 0x04 /*PMIC interrupt register */
|
||||
#define PMIC_REG_MINT 0x05 /*PMIC interrupt mask register */
|
||||
|
||||
/* ADC Interrupt registers */
|
||||
#define PMIC_REG_ADCINT 0x5F /*ADC interrupt register */
|
||||
#define PMIC_REG_MADCINT 0x60 /*ADC interrupt mask register */
|
||||
|
||||
/* ADC Control registers */
|
||||
#define PMIC_REG_ADCCNTL1 0x61 /*ADC control register */
|
||||
|
||||
/* ADC Channel Selection registers */
|
||||
#define PMICADDR0 0xA4
|
||||
#define END_OF_CHANNEL 0x1F
|
||||
|
||||
/* ADC Result register */
|
||||
#define PMIC_REG_ADCSNS0H 0x64
|
||||
|
||||
/* ADC channels for touch screen */
|
||||
#define MRST_TS_CHAN10 0xA /* Touch screen X+ connection */
|
||||
#define MRST_TS_CHAN11 0xB /* Touch screen X- connection */
|
||||
#define MRST_TS_CHAN12 0xC /* 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 */
|
||||
#define XBIAS 0x20
|
||||
#define YBIAS 0x40
|
||||
#define ZBIAS 0x80
|
||||
|
||||
/* Touch screen coordinates */
|
||||
#define MIN_X 10
|
||||
#define MAX_X 1024
|
||||
#define MIN_Y 10
|
||||
#define MAX_Y 1024
|
||||
#define WAIT_ADC_COMPLETION 10
|
||||
|
||||
/* PMIC ADC round robin delays */
|
||||
#define ADC_LOOP_DELAY0 0x0 /* Continuous loop */
|
||||
#define ADC_LOOP_DELAY1 0x1 /* 4.5 ms approximate */
|
||||
|
||||
/* PMIC Vendor Identifiers */
|
||||
#define PMIC_VENDOR_FS 0 /* PMIC vendor FreeScale */
|
||||
#define PMIC_VENDOR_MAXIM 1 /* PMIC vendor MAXIM */
|
||||
#define PMIC_VENDOR_NEC 2 /* PMIC vendor NEC */
|
||||
#define MRSTOUCH_MAX_CHANNELS 32 /* Maximum ADC channels */
|
||||
|
||||
/* Touch screen device structure */
|
||||
struct mrstouch_dev {
|
||||
struct spi_device *spi; /* SPI device associated with touch screen */
|
||||
struct input_dev *input; /* input device for touchscreen*/
|
||||
char phys[32]; /* Device name */
|
||||
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 */
|
||||
int irq; /* Touch screen IRQ # */
|
||||
uint vendor; /* PMIC vendor */
|
||||
uint 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 */
|
||||
static struct mrstouch_dev *mrstouchdevp;
|
||||
|
||||
/* 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;
|
||||
*rev = (r >> 3) & 0x7;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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 mrstouch_chan_parse(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;
|
||||
|
||||
err = intel_scu_ipc_ioread16(PMIC_REG_MADCINT, ®);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
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;
|
||||
|
||||
/*
|
||||
* 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
|
||||
* converts the two readings to single value and turns off gain bit
|
||||
*/
|
||||
static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm)
|
||||
{
|
||||
int err;
|
||||
u16 result;
|
||||
u32 res;
|
||||
|
||||
result = PMIC_REG_ADCSNS0H + offset;
|
||||
|
||||
if (chan == MRST_TS_CHAN12)
|
||||
result += 4;
|
||||
|
||||
err = intel_scu_ipc_ioread32(result, &res);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* Mash the bits up */
|
||||
|
||||
*vp = (res & 0xFF) << 3; /* Highest 7 bits */
|
||||
*vp |= (res >> 8) & 0x07; /* Lower 3 bits */
|
||||
*vp &= 0x3FF;
|
||||
|
||||
res >>= 16;
|
||||
|
||||
*vm = (res & 0xFF) << 3; /* Highest 7 bits */
|
||||
*vm |= (res >> 8) & 0x07; /* Lower 3 bits */
|
||||
*vm &= 0x3FF;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* To configure touch screen channels
|
||||
* Writes touch screen channels to ADC address selection registers
|
||||
*/
|
||||
static int mrstouch_ts_chan_set(uint offset)
|
||||
{
|
||||
int count;
|
||||
u16 chan;
|
||||
u16 reg[5];
|
||||
u8 data[5];
|
||||
|
||||
chan = PMICADDR0 + offset;
|
||||
for (count = 0; count <= 3; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = MRST_TS_CHAN10 + 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);
|
||||
}
|
||||
|
||||
|
||||
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 */
|
||||
static int mrstouch_pmic_fs_adc_read(struct mrstouch_dev *tsdev)
|
||||
{
|
||||
int err;
|
||||
u16 x, y, z, 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;
|
||||
|
||||
#if defined(MRSTOUCH_PRINT_XYZP)
|
||||
mrstouch_debug("X: %d, Y: %d, Z: %d", x, y, z);
|
||||
#endif
|
||||
|
||||
if (z >= TOUCH_PRESSURE_FS) {
|
||||
mrstouch_report_xy(tsdev, x, y, TOUCH_PRESSURE - 1); /* Pen Removed */
|
||||
return TOUCH_PRESSURE - 1;
|
||||
} else {
|
||||
mrstouch_report_xy(tsdev, x, y, TOUCH_PRESSURE + 1); /* Pen Touched */
|
||||
return TOUCH_PRESSURE + 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
ipc_error:
|
||||
dev_err(&tsdev->spi->dev, "ipc error during fs_adc read\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
/* To handle free scale pmic pendet interrupt */
|
||||
static int pmic0_pendet(void *dev_id)
|
||||
{
|
||||
int err, count;
|
||||
u16 chan;
|
||||
unsigned int touched;
|
||||
struct mrstouch_dev *tsdev = (struct mrstouch_dev *)dev_id;
|
||||
u16 reg[5];
|
||||
u8 data[5];
|
||||
|
||||
chan = PMICADDR0 + tsdev->asr;
|
||||
|
||||
/* Set X BIAS */
|
||||
for (count = 0; count <= 3; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = 0x2A;
|
||||
}
|
||||
reg[count] = chan++; /* Dummy */
|
||||
data[count] = 0;
|
||||
|
||||
err = intel_scu_ipc_writev(reg, data, 5);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
/* Set Y BIAS */
|
||||
for (count = 0; count <= 3; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = 0x4A;
|
||||
}
|
||||
reg[count] = chan++; /* Dummy */
|
||||
data[count] = 0;
|
||||
|
||||
err = intel_scu_ipc_writev(reg, data, 5);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
/* Set Z BIAS */
|
||||
err = intel_scu_ipc_iowrite32(chan + 2, 0x8A8A8A8A);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
/*Read touch screen channels till pen removed
|
||||
* Freescale reports constant value of z for all points
|
||||
* z is high when screen is not touched and low when touched
|
||||
* Map high z value to not touched and low z value to pen touched
|
||||
*/
|
||||
touched = mrstouch_pmic_fs_adc_read(tsdev);
|
||||
while (touched > TOUCH_PRESSURE) {
|
||||
touched = mrstouch_pmic_fs_adc_read(tsdev);
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
}
|
||||
|
||||
/* Clear all TS channels */
|
||||
chan = PMICADDR0 + tsdev->asr;
|
||||
for (count = 0; count <= 4; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = 0;
|
||||
}
|
||||
err = intel_scu_ipc_writev(reg, data, 5);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
for (count = 0; count <= 4; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = 0;
|
||||
}
|
||||
err = intel_scu_ipc_writev(reg, data, 5);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
err = intel_scu_ipc_iowrite32(chan + 2, 0x00000000);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
return 0;
|
||||
|
||||
ipc_error:
|
||||
dev_err(&tsdev->spi->dev, "ipc error during pendet\n");
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
/* To enable X, Y and Z bias values
|
||||
* Enables YPYM for X channels and XPXM for Y channels
|
||||
*/
|
||||
static int mrstouch_ts_bias_set(uint offset, uint bias)
|
||||
{
|
||||
int count;
|
||||
u16 chan, start;
|
||||
u16 reg[4];
|
||||
u8 data[4];
|
||||
|
||||
chan = PMICADDR0 + offset;
|
||||
start = MRST_TS_CHAN10;
|
||||
|
||||
for (count = 0; count <= 3; count++) {
|
||||
reg[count] = chan++;
|
||||
data[count] = bias | (start + count);
|
||||
}
|
||||
return intel_scu_ipc_writev(reg, data, 4);
|
||||
}
|
||||
|
||||
/* To read touch screen channel values */
|
||||
static int mrstouch_adc_read(struct mrstouch_dev *tsdev)
|
||||
{
|
||||
int err;
|
||||
u16 xp, xm, yp, ym, zp, zm;
|
||||
|
||||
/* configure Y bias for X channels */
|
||||
err = mrstouch_ts_bias_set(tsdev->asr, YBIAS);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
/* read x+ and x- channels */
|
||||
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, &xp, &xm);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
/* configure x bias for y channels */
|
||||
err = mrstouch_ts_bias_set(tsdev->asr, XBIAS);
|
||||
if (err)
|
||||
goto ipc_error;
|
||||
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
|
||||
/* read y+ and y- channels */
|
||||
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN12, &yp, &ym);
|
||||
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);
|
||||
|
||||
/* read z+ and z- channels */
|
||||
err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, &zp, &zm);
|
||||
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;
|
||||
}
|
||||
|
||||
/* PENDET interrupt handler function for NEC and MAXIM */
|
||||
static void pmic12_pendet(void *data)
|
||||
{
|
||||
unsigned int touched;
|
||||
struct mrstouch_dev *tsdev = (struct mrstouch_dev *)data;
|
||||
|
||||
/* read touch screen channels till pen removed */
|
||||
do {
|
||||
touched = mrstouch_adc_read(tsdev);
|
||||
} while (touched > TOUCH_PRESSURE);
|
||||
}
|
||||
|
||||
/* Handler to process PENDET interrupt */
|
||||
int mrstouch_pendet(void *data)
|
||||
{
|
||||
struct mrstouch_dev *tsdev = (struct mrstouch_dev *)data;
|
||||
while (1) {
|
||||
/* Wait for PENDET interrupt */
|
||||
if (mutex_lock_interruptible(&tsdev->lock)) {
|
||||
msleep(WAIT_ADC_COMPLETION);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (tsdev->busy)
|
||||
return 0;
|
||||
|
||||
tsdev->busy = true;
|
||||
|
||||
if (tsdev->vendor == PMIC_VENDOR_NEC ||
|
||||
tsdev->vendor == PMIC_VENDOR_MAXIM) {
|
||||
/* PENDET must be disabled in NEC before reading ADC */
|
||||
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;
|
||||
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* PENDET interrupt handler */
|
||||
static irqreturn_t pendet_intr_handler(int irq, void *handle)
|
||||
{
|
||||
struct mrstouch_dev *tsdev = (struct mrstouch_dev *)handle;
|
||||
|
||||
mutex_unlock(&tsdev->lock);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/* Intializes input device and registers with input subsystem */
|
||||
static int ts_input_dev_init(struct mrstouch_dev *tsdev, struct spi_device *spi)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
mrstouch_debug("%s", __func__);
|
||||
|
||||
tsdev->input = input_allocate_device();
|
||||
if (!tsdev->input) {
|
||||
dev_err(&tsdev->spi->dev, "Unable to allocate input device.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
tsdev->input->name = "mrst_touchscreen";
|
||||
snprintf(tsdev->phys, sizeof(tsdev->phys),
|
||||
"%s/input0", dev_name(&spi->dev));
|
||||
tsdev->input->phys = tsdev->phys;
|
||||
tsdev->input->dev.parent = &spi->dev;
|
||||
|
||||
tsdev->input->id.vendor = tsdev->vendor;
|
||||
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);
|
||||
|
||||
input_set_abs_params(tsdev->input, ABS_X, MIN_X, MIN_Y, 0, 0);
|
||||
input_set_abs_params(tsdev->input, ABS_Y, MIN_X, MIN_Y, 0, 0);
|
||||
|
||||
err = input_register_device(tsdev->input);
|
||||
if (err) {
|
||||
dev_err(&tsdev->spi->dev, "unable to register input device\n");
|
||||
input_free_device(tsdev->input);
|
||||
return err;
|
||||
}
|
||||
|
||||
mrstouch_debug("%s", "mrstouch initialized");
|
||||
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
/* Probe function for touch screen driver */
|
||||
static int __devinit mrstouch_probe(struct spi_device *mrstouch_spi)
|
||||
{
|
||||
int err;
|
||||
unsigned int myirq;
|
||||
struct mrstouch_dev *tsdev;
|
||||
|
||||
mrstouch_debug("%s(%p)", __func__, mrstouch_spi);
|
||||
|
||||
mrstouchdevp = NULL;
|
||||
myirq = mrstouch_spi->irq;
|
||||
|
||||
if (!mrstouch_spi->irq) {
|
||||
dev_err(&mrstouch_spi->dev, "no interrupt assigned\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL);
|
||||
if (!tsdev) {
|
||||
dev_err(&mrstouch_spi->dev, "unable to allocate memory\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
tsdev->irq = myirq;
|
||||
mrstouchdevp = tsdev;
|
||||
|
||||
err = mrstouch_adc_init(tsdev);
|
||||
if (err) {
|
||||
dev_err(&mrstouch_spi->dev, "ADC init failed\n");
|
||||
goto mrstouch_err_free_mem;
|
||||
}
|
||||
|
||||
dev_set_drvdata(&mrstouch_spi->dev, tsdev);
|
||||
tsdev->spi = mrstouch_spi;
|
||||
|
||||
err = ts_input_dev_init(tsdev, mrstouch_spi);
|
||||
if (err) {
|
||||
dev_err(&tsdev->spi->dev, "ts_input_dev_init failed");
|
||||
goto mrstouch_err_free_mem;
|
||||
}
|
||||
|
||||
mutex_init(&tsdev->lock);
|
||||
mutex_lock(&tsdev->lock)
|
||||
|
||||
mrstouch_debug("Requesting IRQ-%d", myirq);
|
||||
err = request_irq(myirq, pendet_intr_handler,
|
||||
0, "mrstouch", tsdev);
|
||||
if (err) {
|
||||
dev_err(&tsdev->spi->dev, "unable to allocate irq\n");
|
||||
goto mrstouch_err_free_mem;
|
||||
}
|
||||
|
||||
tsdev->pendet_thrd = kthread_run(mrstouch_pendet,
|
||||
(void *)tsdev, "pendet handler");
|
||||
if (IS_ERR(tsdev->pendet_thrd)) {
|
||||
dev_err(&tsdev->spi->dev, "kthread_run failed\n");
|
||||
err = PTR_ERR(tsdev->pendet_thrd);
|
||||
goto mrstouch_err_free_mem;
|
||||
}
|
||||
mrstouch_debug("%s", "Driver initialized");
|
||||
return 0;
|
||||
|
||||
mrstouch_err_free_mem:
|
||||
kfree(tsdev);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int mrstouch_suspend(struct spi_device *spi, pm_message_t msg)
|
||||
{
|
||||
mrstouch_debug("%s", __func__);
|
||||
mrstouchdevp->suspended = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mrstouch_resume(struct spi_device *spi)
|
||||
{
|
||||
mrstouch_debug("%s", __func__);
|
||||
mrstouchdevp->suspended = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
static struct spi_driver mrstouch_driver = {
|
||||
.driver = {
|
||||
.name = "pmic_touch",
|
||||
.bus = &spi_bus_type,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = mrstouch_probe,
|
||||
.suspend = mrstouch_suspend,
|
||||
.resume = mrstouch_resume,
|
||||
.remove = mrstouch_remove,
|
||||
};
|
||||
|
||||
static int __init mrstouch_module_init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
mrstouch_debug("%s", __func__);
|
||||
err = spi_register_driver(&mrstouch_driver);
|
||||
if (err) {
|
||||
mrstouch_debug("%s(%d)", "SPI PENDET failed", err);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit mrstouch_module_exit(void)
|
||||
{
|
||||
mrstouch_debug("%s", __func__);
|
||||
spi_unregister_driver(&mrstouch_driver);
|
||||
return;
|
||||
}
|
||||
|
||||
module_init(mrstouch_module_init);
|
||||
module_exit(mrstouch_module_exit);
|
||||
|
||||
MODULE_AUTHOR("Sreedhara Murthy. D.S, sreedhara.ds@intel.com");
|
||||
MODULE_DESCRIPTION("Intel Moorestown Resistive Touch Screen Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue