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Diffstat (limited to 'meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-touchscreen-driver.patch')
-rw-r--r--meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-touchscreen-driver.patch996
1 files changed, 0 insertions, 996 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
deleted file mode 100644
index 1b11cd352..000000000
--- a/meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-touchscreen-driver.patch
+++ /dev/null
@@ -1,996 +0,0 @@
-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 v1.2.3 (git 2.39.1) at 2024-08-05 15:01:57 +0000