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-rw-r--r--meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-touchscreen-driver.patch996
1 files changed, 996 insertions, 0 deletions
diff --git a/meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-touchscreen-driver.patch b/meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-touchscreen-driver.patch
new file mode 100644
index 0000000000..1b11cd3520
--- /dev/null
+++ b/meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-touchscreen-driver.patch
@@ -0,0 +1,996 @@
+From f7ba5de3af0c7d3abd7624676e07752e5d8b7ebd Mon Sep 17 00:00:00 2001
+From: Jacob Pan <jacob.jun.pan@intel.com>
+Date: Fri, 4 Dec 2009 10:57:07 -0800
+Subject: [PATCH 040/104] MRST: touch screen driver
+
+---
+ drivers/input/touchscreen/Kconfig | 9 +
+ drivers/input/touchscreen/Makefile | 2 +
+ drivers/input/touchscreen/mrstouch.c | 947 ++++++++++++++++++++++++++++++++++
+ 3 files changed, 958 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/input/touchscreen/mrstouch.c
+
+diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
+index dfafc76..6dd2674 100644
+--- a/drivers/input/touchscreen/Kconfig
++++ b/drivers/input/touchscreen/Kconfig
+@@ -577,4 +577,13 @@ config TOUCHSCREEN_PCAP
+
+ To compile this driver as a module, choose M here: the
+ module will be called pcap_ts.
++
++config TOUCHSCREEN_MRSTOUCH
++ tristate "Intel Moorstown Resistive touchscreen"
++ depends on LNW_IPC
++ default y
++ help
++ Say Y here if you have a Intel Moorstown based Touchscreen
++ If unsure, say N.
++
+ endif
+diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
+index d61a3b4..15ad257 100644
+--- a/drivers/input/touchscreen/Makefile
++++ b/drivers/input/touchscreen/Makefile
+@@ -45,3 +45,5 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX_ATMEL) += atmel-wm97xx.o
+ obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o
+ obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o
+ obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o
++obj-$(CONFIG_TOUCHSCREEN_MRSTOUCH) += mrstouch.o
++
+diff --git a/drivers/input/touchscreen/mrstouch.c b/drivers/input/touchscreen/mrstouch.c
+new file mode 100644
+index 0000000..f6aba7d
+--- /dev/null
++++ b/drivers/input/touchscreen/mrstouch.c
+@@ -0,0 +1,947 @@
++/*
++ * mrstouch.c - Intel Moorestown 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)
++ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
++ */
++#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/ipc_defs.h>
++
++MODULE_AUTHOR("Sreedhara Murthy. D.S, sreedhara.ds@intel.com");
++MODULE_DESCRIPTION("Intel Moorestown Resistive Touch Screen Driver");
++MODULE_LICENSE("GPL");
++
++#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
++
++#define mrstouch_error(fmt, args...)\
++ do { \
++ printk(KERN_ERR "\n[MRSTOUCH(%d)] - ", __LINE__); \
++ printk(KERN_ERR fmt, ##args); \
++ } while (0);
++
++/* 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 5
++#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 semaphore 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;
++ struct ipc_pmic_reg_data ipcbuf;
++
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 1;
++ ipcbuf.pmic_reg_data[0].register_address = PMIC_REG_ID1;
++
++ err = ipc_pmic_register_read(&ipcbuf);
++ if (err)
++ return -1;
++
++ *vendor = (ipcbuf.pmic_reg_data[0].value) & 0x7;
++ *rev = (ipcbuf.pmic_reg_data[0].value >> 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(void)
++{
++ int err, i, j, chan, found;
++ struct ipc_pmic_reg_data ipcbuf;
++
++ ipcbuf.ioc = 1;
++
++ found = -1;
++ ipcbuf.num_entries = 4;
++
++ for (i = 0; i < MRSTOUCH_MAX_CHANNELS; i++) {
++ if (found >= 0)
++ break;
++
++ for (j = 0; j <= 3; j++)
++ ipcbuf.pmic_reg_data[j].register_address = PMICADDR0+i;
++
++ err = ipc_pmic_register_read(&ipcbuf);
++ if (err)
++ return -1;
++
++ for (j = 0; j < ipcbuf.num_entries; j++) {
++ chan = ipcbuf.pmic_reg_data[j].value;
++ if (chan == END_OF_CHANNEL) {
++ found = i;
++ break;
++ }
++ }
++ }
++
++ if (found < 0)
++ return 0;
++
++ if (mrstouchdevp->vendor == PMIC_VENDOR_FS) {
++ if (found && found > (MRSTOUCH_MAX_CHANNELS - 18))
++ return -1;
++ } else {
++ if (found && found > (MRSTOUCH_MAX_CHANNELS - 4))
++ return -1;
++ }
++ 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 void pendet_enable(bool pendet)
++{
++ u8 adccntrl1 = 0;
++ u8 pendet_enabled = 0;
++ int retry = 0;
++ struct ipc_pmic_reg_data ipcbuf;
++
++ ipcbuf.ioc = 1;
++
++ ipcbuf.num_entries = 1;
++ ipcbuf.pmic_reg_data[0].register_address = PMIC_REG_ADCCNTL1;
++ ipc_pmic_register_read(&ipcbuf);
++ adccntrl1 = ipcbuf.pmic_reg_data[0].value;
++
++ if (pendet)
++ adccntrl1 |= 0x20; /* Enable pendet */
++ else
++ adccntrl1 &= 0xDF; /* Disable pendet */
++
++ ipcbuf.num_entries = 2;
++ ipcbuf.pmic_reg_data[0].register_address = PMIC_REG_MADCINT;
++ ipcbuf.pmic_reg_data[0].value = 0x0;
++ ipcbuf.pmic_reg_data[1].register_address = PMIC_REG_ADCCNTL1;
++ ipcbuf.pmic_reg_data[1].value = adccntrl1;
++ ipc_pmic_register_write(&ipcbuf, 1);
++
++ if (!pendet)
++ return;
++
++
++ /*
++ * Sometimes even after ipc_pmic_register_write success
++ * the PMIC register value is not updated. Retry few iterations
++ * to enable pendet.
++ */
++ ipcbuf.num_entries = 1;
++ ipcbuf.pmic_reg_data[0].register_address = PMIC_REG_ADCCNTL1;
++ ipc_pmic_register_read(&ipcbuf);
++ pendet_enabled = (ipcbuf.pmic_reg_data[0].value >> 5) & 0x01;
++
++ retry = 0;
++ while (!pendet_enabled) {
++ retry++;
++ msleep(10);
++ ipcbuf.pmic_reg_data[0].register_address = PMIC_REG_ADCCNTL1;
++ ipcbuf.pmic_reg_data[0].value = adccntrl1;
++ ipc_pmic_register_write(&ipcbuf, 1);
++
++ ipcbuf.pmic_reg_data[0].register_address = PMIC_REG_ADCCNTL1;
++ ipc_pmic_register_read(&ipcbuf);
++ pendet_enabled = (ipcbuf.pmic_reg_data[0].value >> 5) & 0x01;
++ if (retry >= 10) {
++ printk(KERN_ERR "Touch screen disabled\n");
++ break;
++ }
++ }
++}
++
++
++/* 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, count;
++ u16 result;
++ struct ipc_pmic_reg_data ipcbuf;
++
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 4;
++
++ result = PMIC_REG_ADCSNS0H + offset;
++
++ if (chan == MRST_TS_CHAN12)
++ result += 4;
++
++ for (count = 0; count <= 3; count++)
++ ipcbuf.pmic_reg_data[count].register_address = result++;
++
++ err = ipc_pmic_register_read(&ipcbuf);
++ if (err)
++ return -1;
++
++ *vp = ipcbuf.pmic_reg_data[0].value << 3; /* Higher 7 bits */
++ *vp |= ipcbuf.pmic_reg_data[1].value & 0x7; /* Lower 3 bits */
++ *vp &= 0x3FF;
++
++ *vm = ipcbuf.pmic_reg_data[2].value << 3; /* Higher 7 bits */
++ *vm |= ipcbuf.pmic_reg_data[3].value & 0x7; /* 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 err, count;
++ u16 chan;
++ struct ipc_pmic_reg_data ipcbuf;
++
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 5;
++
++ chan = PMICADDR0 + offset;
++ for (count = 0; count <= 3; count++) {
++ ipcbuf.pmic_reg_data[count].register_address = chan++;
++ ipcbuf.pmic_reg_data[count].value = MRST_TS_CHAN10 + count;
++ }
++ ipcbuf.pmic_reg_data[count].register_address = chan;
++ ipcbuf.pmic_reg_data[count].value = END_OF_CHANNEL;
++
++ err = ipc_pmic_register_write(&ipcbuf, 1);
++ if (err)
++ return -1;
++
++ return 0;
++}
++
++/* Initialize ADC */
++static int mrstouch_adc_init(struct mrstouch_dev *tsdev)
++{
++ int err, start;
++ struct ipc_pmic_mod_reg_data ipcbuf;
++
++ err = mrstouch_pmic_id(&tsdev->vendor, &tsdev->rev);
++ if (err) {
++ printk(KERN_ERR "Error in reading PMIC Id");
++ return err;
++ }
++
++ start = mrstouch_chan_parse();
++ if (start == -1) {
++ printk(KERN_ERR "Error in parse channels");
++ 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.
++ */
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 2;
++ ipcbuf.pmic_mod_reg_data[0].register_address = PMIC_REG_ADCCNTL1;
++ ipcbuf.pmic_mod_reg_data[0].bit_map = 0xE7;
++
++ ipcbuf.pmic_mod_reg_data[1].register_address = PMIC_REG_MADCINT;
++ ipcbuf.pmic_mod_reg_data[1].bit_map = 0x03;
++
++ if (tsdev->vendor == PMIC_VENDOR_FS) {
++ ipcbuf.pmic_mod_reg_data[0].value = 0xE0 | ADC_LOOP_DELAY0;
++ ipcbuf.pmic_mod_reg_data[1].value = 0x5;
++ } else {
++ /* NEC and MAXIm not consistent with loop delay 0 */
++ ipcbuf.pmic_mod_reg_data[0].value = 0xE0 | ADC_LOOP_DELAY1;
++ ipcbuf.pmic_mod_reg_data[1].value = 0x0;
++
++ /* configure touch screen channels */
++ err = mrstouch_ts_chan_set(tsdev->asr);
++ if (err)
++ return err;
++ }
++
++ err = ipc_pmic_register_read_modify(&ipcbuf);
++
++ return err;
++}
++
++/* Reports x,y coordinates to event subsystem */
++static void mrstouch_report_xy(u16 x, u16 y, u16 z)
++{
++ int xdiff, ydiff;
++
++ if (mrstouchdevp->pendown && z <= TOUCH_PRESSURE) {
++ /* Pen removed, report button release */
++ mrstouch_debug("BTN REL(%d)", z);
++ input_report_key(mrstouchdevp->input, BTN_TOUCH, 0);
++ mrstouchdevp->pendown = false;
++ }
++
++ xdiff = abs(x - mrstouchdevp->x);
++ ydiff = abs(y - mrstouchdevp->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 (mrstouchdevp->pendown) {
++ mrstouch_debug("BTN REL(%d)", z);
++ input_report_key(mrstouchdevp->input, BTN_TOUCH, 0);
++ mrstouchdevp->pendown = false;
++ }
++ return;
++ } else if (xdiff >= XMOVE_LIMIT || ydiff >= YMOVE_LIMIT) {
++ mrstouchdevp->x = x;
++ mrstouchdevp->y = y;
++
++ input_report_abs(mrstouchdevp->input, ABS_X, x);
++ input_report_abs(mrstouchdevp->input, ABS_Y, y);
++ input_sync(mrstouchdevp->input);
++ }
++
++
++ if (!mrstouchdevp->pendown && z > TOUCH_PRESSURE) {
++ /* Pen touched, report button touch */
++ mrstouch_debug("BTN TCH(%d, %d, %d)", x, y, z);
++ input_report_key(mrstouchdevp->input, BTN_TOUCH, 1);
++ mrstouchdevp->pendown = true;
++ }
++}
++
++
++/* Utility to start ADC, used by freescale handler */
++static int pendet_mask(void)
++{
++ int err = 0;
++ struct ipc_pmic_mod_reg_data ipcbuf;
++
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 1;
++ ipcbuf.pmic_mod_reg_data[1].register_address = PMIC_REG_MADCINT;
++ ipcbuf.pmic_mod_reg_data[1].bit_map = 0x02;
++ ipcbuf.pmic_mod_reg_data[1].value = 0x01;
++
++ err = ipc_pmic_register_read_modify(&ipcbuf);
++
++ return err;
++}
++
++/* Utility to stop ADC, used by freescale handler */
++static int pendet_umask(void)
++{
++ int err = 0;
++ struct ipc_pmic_mod_reg_data ipcbuf;
++
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 1;
++ ipcbuf.pmic_mod_reg_data[1].register_address = PMIC_REG_MADCINT;
++ ipcbuf.pmic_mod_reg_data[1].bit_map = 0x02;
++ ipcbuf.pmic_mod_reg_data[1].value = 0x0;
++
++ err = ipc_pmic_register_read_modify(&ipcbuf);
++
++ return err;
++}
++
++/* 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;
++ struct ipc_pmic_reg_data ipcbuf;
++
++ result = PMIC_REG_ADCSNS0H + tsdev->asr;
++
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 4;
++ ipcbuf.pmic_reg_data[0].register_address = result + 4;
++ ipcbuf.pmic_reg_data[1].register_address = result + 5;
++ ipcbuf.pmic_reg_data[2].register_address = result + 16;
++ ipcbuf.pmic_reg_data[3].register_address = result + 17;
++
++ err = ipc_pmic_register_read(&ipcbuf);
++ if (err)
++ goto ipc_error;
++
++ x = ipcbuf.pmic_reg_data[0].value << 3; /* Higher 7 bits */
++ x |= ipcbuf.pmic_reg_data[1].value & 0x7; /* Lower 3 bits */
++ x &= 0x3FF;
++
++ y = ipcbuf.pmic_reg_data[2].value << 3; /* Higher 7 bits */
++ y |= ipcbuf.pmic_reg_data[3].value & 0x7; /* Lower 3 bits */
++ y &= 0x3FF;
++
++ /* Read Z value */
++ ipcbuf.num_entries = 2;
++ ipcbuf.pmic_reg_data[0].register_address = result + 28;
++ ipcbuf.pmic_reg_data[1].register_address = result + 29;
++
++ err = ipc_pmic_register_read(&ipcbuf);
++ if (err)
++ goto ipc_error;
++
++ z = ipcbuf.pmic_reg_data[0].value << 3; /* Higher 7 bits */
++ z |= ipcbuf.pmic_reg_data[1].value & 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(x, y, TOUCH_PRESSURE - 1); /* Pen Removed */
++ return TOUCH_PRESSURE - 1;
++ } else {
++ mrstouch_report_xy(x, y, TOUCH_PRESSURE + 1); /* Pen Touched */
++ return TOUCH_PRESSURE + 1;
++ }
++
++ return 0;
++
++ipc_error:
++ printk(KERN_ERR "IPC Error: %s", __func__);
++ return -1;
++}
++
++/* To handle free scale pmic pendet interrupt */
++static int pmic0_pendet(void *data)
++{
++ int err, count;
++ u16 chan;
++ unsigned int touched;
++ struct ipc_pmic_reg_data ipcbuf;
++ struct mrstouch_dev *tsdev = (struct mrstouch_dev *)data;
++
++ chan = PMICADDR0 + tsdev->asr;
++
++ ipcbuf.ioc = 1;
++ /* Set X BIAS */
++ ipcbuf.num_entries = 5;
++ for (count = 0; count <= 3; count++) {
++ ipcbuf.pmic_reg_data[count].register_address = chan++;
++ ipcbuf.pmic_reg_data[count].value = 0x2A;
++ }
++ ipcbuf.pmic_reg_data[count].register_address = chan++; /* Dummy */
++ ipcbuf.pmic_reg_data[count].value = 0;
++
++ err = ipc_pmic_register_write(&ipcbuf, 1);
++ if (err)
++ goto ipc_error;
++
++ msleep(WAIT_ADC_COMPLETION);
++
++ /* Set Y BIAS */
++ ipcbuf.num_entries = 5;
++ for (count = 0; count <= 3; count++) {
++ ipcbuf.pmic_reg_data[count].register_address = chan++;
++ ipcbuf.pmic_reg_data[count].value = 0x4A;
++ }
++ ipcbuf.pmic_reg_data[count].register_address = chan++; /* Dummy */
++ ipcbuf.pmic_reg_data[count].value = 0;
++
++ err = ipc_pmic_register_write(&ipcbuf, 1);
++ if (err)
++ goto ipc_error;
++
++ msleep(WAIT_ADC_COMPLETION);
++
++ /* Set Z BIAS */
++ chan += 2;
++ ipcbuf.num_entries = 4;
++ for (count = 0; count <= 3; count++) {
++ ipcbuf.pmic_reg_data[count].register_address = chan++;
++ ipcbuf.pmic_reg_data[count].value = 0x8A;
++ }
++
++ err = ipc_pmic_register_write(&ipcbuf, 1);
++ 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;
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 5;
++ for (count = 0; count <= 4; count++) {
++ ipcbuf.pmic_reg_data[count].register_address = chan++;
++ ipcbuf.pmic_reg_data[count].value = 0x0;
++ }
++ err = ipc_pmic_register_write(&ipcbuf, 1);
++ if (err)
++ goto ipc_error;
++
++ for (count = 0; count <= 4; count++) {
++ ipcbuf.pmic_reg_data[count].register_address = chan++;
++ ipcbuf.pmic_reg_data[count].value = 0x0;
++ }
++ err = ipc_pmic_register_write(&ipcbuf, 1);
++ if (err)
++ goto ipc_error;
++
++ chan += 2;
++ for (count = 0; count <= 4; count++) {
++ ipcbuf.pmic_reg_data[count].register_address = chan++;
++ ipcbuf.pmic_reg_data[count].value = 0x0;
++ }
++ err = ipc_pmic_register_write(&ipcbuf, 1);
++ if (err)
++ goto ipc_error;
++
++ return 0;
++
++ipc_error:
++ printk(KERN_ERR "IPC Error: %s", __func__);
++ return -1;
++}
++
++
++/* 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 err, count;
++ u16 chan, start;
++ struct ipc_pmic_reg_data ipcbuf;
++
++ chan = PMICADDR0 + offset;
++ start = MRST_TS_CHAN10;
++
++ ipcbuf.ioc = 1;
++ ipcbuf.num_entries = 4;
++
++ for (count = 0; count <= 3; count++) {
++ ipcbuf.pmic_reg_data[count].register_address = chan++;
++ ipcbuf.pmic_reg_data[count].value = bias | (start + count);
++ }
++
++ err = ipc_pmic_register_write(&ipcbuf, 1);
++ if (err)
++ return -1;
++
++ return 0;
++}
++
++/* 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(xp, yp, zp); /* report x and y to eventX */
++
++ return zp;
++
++ipc_error:
++ printk(KERN_ERR "IPC Error: %s", __func__);
++ return -1;
++}
++
++/* 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 */
++ touched = mrstouch_adc_read(tsdev);
++ while (touched > TOUCH_PRESSURE) {
++ msleep(WAIT_ADC_COMPLETION);
++ touched = mrstouch_adc_read(tsdev);
++ }
++}
++
++/* 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 (down_interruptible(&tsdev->lock)) {
++ msleep(WAIT_ADC_COMPLETION);
++ continue;
++ }
++
++ if (tsdev->busy)
++ return 0;
++
++ tsdev->busy = true;
++
++ if (mrstouchdevp->vendor == PMIC_VENDOR_NEC ||
++ mrstouchdevp->vendor == PMIC_VENDOR_MAXIM) {
++ /* PENDET must be disabled in NEC before reading ADC */
++ pendet_enable(false); /* Disbale PENDET */
++ pmic12_pendet(mrstouchdevp);
++ pendet_enable(true); /*Enable PENDET */
++ } else if (mrstouchdevp->vendor == PMIC_VENDOR_FS) {
++ pendet_umask(); /* Stop ADC */
++ pmic0_pendet(mrstouchdevp);
++ pendet_mask(); /* Stop ADC */
++ } else
++ printk(KERN_ERR "Unknown PMIC, Not supported\n");
++
++ 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;
++
++ up(&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) {
++ mrstouch_error("%s", "Input dev allocation failed");
++ return -1;
++ }
++
++ 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) {
++ mrstouch_error("%s", "Input dev registration failed");
++ input_free_device(tsdev->input);
++ return -1;
++ }
++
++ 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) {
++ mrstouch_error("%s(%d)", "No IRQ", myirq);
++ return -1;
++ }
++
++ tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL);
++ if (!tsdev) {
++ mrstouch_error("%s", "ERROR: Memory failure");
++ return -ENOMEM;
++ }
++
++ tsdev->irq = myirq;
++ mrstouchdevp = tsdev;
++
++ if (mrstouch_adc_init(tsdev) != 0) {
++ mrstouch_error("%s", "ADC init failed");
++ 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 != 0) {
++ mrstouch_error("%s", "ts_input_dev_init failed");
++ goto mrstouch_err_free_mem;
++ }
++
++ sema_init(&tsdev->lock, 1);
++ if (down_interruptible(&tsdev->lock)) {
++ mrstouch_error("%s", "tsdev->lock Error");
++ goto mrstouch_err_free_mem;
++ }
++
++ mrstouch_debug("Requesting IRQ-%d", myirq);
++ err = request_irq(myirq, pendet_intr_handler,
++ 0, "mrstouch", tsdev);
++ if (err) {
++ mrstouch_error("IRQ Request Failed - %d", err);
++ 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");
++ goto mrstouch_err_free_mem;
++ }
++
++ mrstouch_debug("%s", "Driver initialized");
++
++ return 0;
++
++ mrstouch_err_free_mem:
++ kfree(tsdev);
++ return -1;
++}
++
++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);
++ kfree(mrstouchdevp);
++ if (mrstouchdevp->pendet_thrd)
++ kthread_stop(mrstouchdevp->pendet_thrd);
++ 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);
+--
+1.6.2.5
+
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-18 13:43:03 +0000