Hi, This patch is to add support for SiS i2c touch panel.
Thanks a lot.
Signed-off-by: Yuger <yuger_yu@xxxxxxx>
---
drivers/input/touchscreen/Kconfig | 11 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/sis_i2c.c | 627 ++++++++++++++++++++++++++++++++++++
drivers/input/touchscreen/sis_i2c.h | 164 ++++++++++
4 files changed, 803 insertions(+)
create mode 100644 drivers/input/touchscreen/sis_i2c.c
create mode 100644 drivers/input/touchscreen/sis_i2c.h
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index d20fe1d..3d7a30d 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -1027,4 +1027,15 @@ config TOUCHSCREEN_ZFORCE
To compile this driver as a module, choose M here: the
module will be called zforce_ts.
+config TOUCHSCREEN_SIS_I2C
+ tristate "SiS 9200 family I2C touchscreen driver"
+ depends on I2C
+ help
+ Say Y here to enable support for I2C connected SiS touch panels.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called sis_i2c.
+
endif
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 44deea7..02b466e 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -84,3 +84,4 @@ obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o
obj-$(CONFIG_TOUCHSCREEN_SX8654) += sx8654.o
obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o
obj-$(CONFIG_TOUCHSCREEN_ZFORCE) += zforce_ts.o
+obj-$(CONFIG_TOUCHSCREEN_SIS_I2C) += sis_i2c.o
diff --git a/drivers/input/touchscreen/sis_i2c.c b/drivers/input/touchscreen/sis_i2c.c
new file mode 100644
index 0000000..22dfc1f
--- /dev/null
+++ b/drivers/input/touchscreen/sis_i2c.c
@@ -0,0 +1,627 @@
+/*
+ * Touch Screen driver for SiS 9200 family I2C Touch panels
+ *
+ * Copyright (C) 2015 SiS, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ * Date: 2015/07/07
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/hrtimer.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include "sis_i2c.h"
+#include <linux/linkage.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/uaccess.h>
+#include <linux/irq.h>
+#include <asm/unaligned.h>
+#include <linux/input/mt.h> /*For Type-B Slot function*/
+#include <linux/crc-itu-t.h> /*For CRC Check*/
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { SIS_SLAVE_ADDR,
+I2C_CLIENT_END }; static struct workqueue_struct *sis_wq; struct
+sis_ts_data *ts_bak; static void sis_tpinfo_clear(struct
+sisTP_driver_data *TPInfo, int max);
+
+static int sis_command_for_read(struct i2c_client *client, int rlength,
+ unsigned char *rdata)
+{
+ int ret;
+ struct i2c_msg msg;
+
+ msg.addr = client->addr;
+ msg.flags = I2C_M_RD; /*Read*/
+ msg.len = rlength;
+ msg.buf = rdata;
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ return ret;
+}
+
+static int sis_cul_unit(uint8_t report_id) {
+ int ret = NORMAL_LEN_PER_POINT;
+
+ if (report_id != ALL_IN_ONE_PACKAGE) {
+ if (IS_AREA(report_id))
+ ret += AREA_LEN_PER_POINT;
+ if (IS_PRESSURE(report_id))
+ ret += PRESSURE_LEN_PER_POINT;
+ }
+
+ return ret;
+}
+
+static int sis_ReadPacket(struct i2c_client *client, uint8_t cmd,
+uint8_t *buf) {
+ uint8_t tmpbuf[MAX_BYTE] = {0}; /*MAX_BYTE = 64;*/
+ int ret;
+ int touchnum = 0;
+ int p_count = 0;
+ int touc_formate_id = 0;
+ int locate = 0;
+ bool read_first = true;
+ /*
+ * New i2c format
+ * buf[0] = Low 8 bits of byte count value
+ * buf[1] = High 8 bits of byte counte value
+ * buf[2] = Report ID
+ * buf[touch num * 6 + 2 ] = Touch information;
+ * 1 touch point has 6 bytes, it could be none if no touch
+ * buf[touch num * 6 + 3] = Touch numbers
+ *
+ * One touch point information include 6 bytes, the order is
+ *
+ * 1. status = touch down or touch up
+ * 2. id = finger id
+ * 3. x axis low 8 bits
+ * 4. x axis high 8 bits
+ * 5. y axis low 8 bits
+ * 6. y axis high 8 bits
+ * */
+ do {
+ if (locate >= PACKET_BUFFER_SIZE) {
+ pr_err("sis_ReadPacket: Buf Overflow\n");
+ return -EPERM;
+ }
+ ret = sis_command_for_read(client, MAX_BYTE, tmpbuf);
+
+ if (ret < 0) {
+ pr_err("sis_ReadPacket: i2c transfer error\n");
+ return ret;
+ }
+ /*error package length of receiving data*/
+ else if (tmpbuf[P_BYTECOUNT] > MAX_BYTE) {
+ pr_err("sis_ReadPacket: Error Bytecount\n");
+ return -EPERM;
+ }
+ if (read_first) {
+ /*access NO TOUCH event unless BUTTON NO TOUCH event*/
+ if (tmpbuf[P_BYTECOUNT] == 0/*NO_TOUCH_BYTECOUNT*/)
+ return 0; /*touchnum is 0*/
+ }
+ /*skip parsing data when two devices are registered
+ * at the same slave address*/
+ /*parsing data when P_REPORT_ID && 0xf is TOUCH_FORMAT
+ * or P_REPORT_ID is ALL_IN_ONE_PACKAGE*/
+ touc_formate_id = tmpbuf[P_REPORT_ID] & 0xf;
+ if ((touc_formate_id != TOUCH_FORMAT)
+ && (touc_formate_id != HIDI2C_FORMAT)
+ && (tmpbuf[P_REPORT_ID] != ALL_IN_ONE_PACKAGE)) {
+ pr_err("sis_ReadPacket: Error Report_ID\n");
+ return -EPERM;
+ }
+ p_count = (int) tmpbuf[P_BYTECOUNT] - 1; /*start from 0*/
+ if (tmpbuf[P_REPORT_ID] != ALL_IN_ONE_PACKAGE) {
+ if (IS_TOUCH(tmpbuf[P_REPORT_ID])) {
+ p_count -= BYTE_CRC_I2C;/*delete 2 byte crc*/
+ } else if (IS_HIDI2C(tmpbuf[P_REPORT_ID])) {
+ p_count -= BYTE_CRC_HIDI2C;
+ } else { /*should not be happen*/
+ pr_err("sis_ReadPacket: delete crc error\n");
+ return -EPERM;
+ }
+ if (IS_SCANTIME(tmpbuf[P_REPORT_ID]))
+ p_count -= BYTE_SCANTIME;
+ }
+ /*For ALL_IN_ONE_PACKAGE*/
+ if (read_first) {
+ touchnum = tmpbuf[p_count];
+ } else {
+ if (tmpbuf[p_count] != 0) {
+ pr_err("sis_ReadPacket: get error package\n");
+ return -EPERM;
+ }
+ }
+
+#ifdef _CHECK_CRC
+ /* HID over I2C data foramt and no touch packet without CRC */
+ if ((touc_formate_id != HIDI2C_FORMAT) &&
+ (tmpbuf[P_BYTECOUNT] > 3)) {
+ int crc_end = p_count + (IS_SCANTIME(
+ tmpbuf[P_REPORT_ID]) * 2);
+ uint16_t buf_crc = crc_itu_t(
+ 0, tmpbuf + 2, crc_end - 1);
+ int l_package_crc = (IS_SCANTIME(
+ tmpbuf[P_REPORT_ID]) * 2) + p_count + 1;
+ uint16_t package_crc = get_unaligned_le16(
+ &tmpbuf[l_package_crc]);
+
+ if (buf_crc != package_crc) {
+ pr_err("sis_ReadPacket: CRC Error\n");
+ return -EPERM;
+ }
+ }
+#endif
+ memcpy(&buf[locate], &tmpbuf[0], 64);
+ /*Buf_Data [0~63] [64~128]*/
+ locate += 64;
+ read_first = false;
+ } while (tmpbuf[P_REPORT_ID] != ALL_IN_ONE_PACKAGE &&
+ tmpbuf[p_count] > 5);
+ return touchnum;
+}
+
+static void sis_ts_work_func(struct work_struct *work) {
+ struct sis_ts_data *ts = container_of(work, struct sis_ts_data, work);
+ struct sisTP_driver_data *TPInfo = ts->TPInfo;
+ int ret;
+ int point_unit;
+ uint8_t buf[PACKET_BUFFER_SIZE] = {0};
+ uint8_t i = 0, fingers = 0;
+ uint8_t px = 0, py = 0, pstatus = 0;
+ uint8_t p_area = 0;
+ uint8_t p_preasure = 0;
+ int CheckID[MAX_FINGERS];
+ static int Pre_CheckID[MAX_FINGERS];
+ struct TypeB_Slot MM_Slot[MAX_FINGERS];
+
+ memset(CheckID, 0, sizeof(int)*MAX_FINGERS);
+
+ mutex_lock(&ts->mutex_wq);
+ /*I2C or SMBUS block data read*/
+ ret = sis_ReadPacket(ts->client, SIS_CMD_NORMAL, buf);
+ /*Error Number*/
+ if (ret < 0)
+ goto err_free_allocate;
+ /*access NO TOUCH event unless BUTTON NO TOUCH event*/
+ else if (ret == 0) {
+ fingers = 0;
+ sis_tpinfo_clear(TPInfo, MAX_FINGERS);
+
+ goto Tye_B_report;
+ }
+ sis_tpinfo_clear(TPInfo, MAX_FINGERS);
+
+ /*Parser and Get the sis9200 data*/
+ point_unit = sis_cul_unit(buf[P_REPORT_ID]);
+ fingers = ret;
+
+ TPInfo->fingers = fingers = (fingers > MAX_FINGERS ? 0 : fingers);
+
+ /*fingers 10 = 0 ~ 9*/
+ for (i = 0; i < fingers; i++) {
+ if ((buf[P_REPORT_ID] != ALL_IN_ONE_PACKAGE) && (i >= 5)) {
+ /*Calc point status*/
+ pstatus = BYTE_BYTECOUNT + BYTE_ReportID
+ + ((i - 5) * point_unit);
+ pstatus += 64;
+ } else {
+ pstatus = BYTE_BYTECOUNT + BYTE_ReportID
+ + (i * point_unit);
+ /*Calc point status*/
+ }
+ px = pstatus + 2; /*Calc point x_coord*/
+ py = px + 2; /*Calc point y_coord*/
+ if ((buf[pstatus]) == TOUCHUP) {
+ TPInfo->pt[i].Width = 0;
+ TPInfo->pt[i].Height = 0;
+ TPInfo->pt[i].Pressure = 0;
+ } else if (buf[P_REPORT_ID] == ALL_IN_ONE_PACKAGE
+ && (buf[pstatus]) == TOUCHDOWN) {
+ TPInfo->pt[i].Width = 1;
+ TPInfo->pt[i].Height = 1;
+ TPInfo->pt[i].Pressure = 1;
+ } else if ((buf[pstatus]) == TOUCHDOWN) {
+ p_area = py + 2;
+ p_preasure = py + 2 + (IS_AREA(buf[P_REPORT_ID]) * 2);
+ /*area*/
+ if (IS_AREA(buf[P_REPORT_ID])) {
+ TPInfo->pt[i].Width = buf[p_area];
+ TPInfo->pt[i].Height = buf[p_area + 1];
+ } else {
+ TPInfo->pt[i].Width = 1;
+ TPInfo->pt[i].Height = 1;
+ }
+ /*pressure*/
+ if (IS_PRESSURE(buf[P_REPORT_ID]))
+ TPInfo->pt[i].Pressure = (buf[p_preasure]);
+ else
+ TPInfo->pt[i].Pressure = 1;
+ } else {
+ pr_err("sis_ts_work_func: Error Touch Status\n");
+ goto err_free_allocate;
+ }
+ TPInfo->pt[i].id = (buf[pstatus + 1]);
+ TPInfo->pt[i].x = get_unaligned_le16(&buf[px]);
+ TPInfo->pt[i].y = get_unaligned_le16(&buf[py]);
+
+ CheckID[TPInfo->pt[i].id] = 1;
+ MM_Slot[TPInfo->pt[i].id].id = TPInfo->pt[i].id;
+ MM_Slot[TPInfo->pt[i].id].Pressure = TPInfo->pt[i].Pressure;
+ MM_Slot[TPInfo->pt[i].id].x = TPInfo->pt[i].x;
+ MM_Slot[TPInfo->pt[i].id].y = TPInfo->pt[i].y;
+ MM_Slot[TPInfo->pt[i].id].Width = TPInfo->pt[i].Width
+ * AREA_UNIT;
+ MM_Slot[TPInfo->pt[i].id].Height = TPInfo->pt[i].Height
+ * AREA_UNIT;
+
+ }
+
+Tye_B_report:
+
+ for (i = 0; i < MAX_FINGERS; i++) {
+ if ((CheckID[i] != Pre_CheckID[i]) && (CheckID[i] != 1))
+ CheckID[i] = -1;
+ }
+
+ for (i = 0; i < MAX_FINGERS; i++) {
+ if (CheckID[i] == 1) {
+ input_mt_slot(ts->input_dev, i+1);
+ if (MM_Slot[i].Pressure > 0) {
+ input_mt_report_slot_state(ts->input_dev,
+ MT_TOOL_FINGER, true);
+ input_report_abs(ts->input_dev,
+ ABS_MT_PRESSURE, MM_Slot[i].Pressure);
+ input_report_abs(ts->input_dev,
+ ABS_MT_TOUCH_MAJOR, MM_Slot[i].Width);
+ input_report_abs(ts->input_dev,
+ ABS_MT_TOUCH_MINOR, MM_Slot[i].Height);
+ input_report_abs(ts->input_dev,
+ ABS_MT_POSITION_X, MM_Slot[i].x);
+ input_report_abs(ts->input_dev,
+ ABS_MT_POSITION_Y, MM_Slot[i].y);
+ } else {
+ input_mt_report_slot_state(ts->input_dev,
+ MT_TOOL_FINGER, false);
+ CheckID[i] = 0;
+ }
+ } else if (CheckID[i] == -1) {
+ input_mt_slot(ts->input_dev, i+1);
+ input_mt_report_slot_state(ts->input_dev,
+ MT_TOOL_FINGER, false);
+ CheckID[i] = 0;
+ }
+ Pre_CheckID[i] = CheckID[i];
+ }
+
+ input_sync(ts->input_dev);
+
+err_free_allocate:
+
+ if (ts->use_irq) {
+#ifdef _INT_MODE_1 /*case 1 mode*/
+ /*TODO: After interrupt status low,
+ * read i2c bus data by polling,
+ * until interrupt status is high*/
+ ret = gpio_get_value(GPIO_IRQ);
+ /*interrupt pin is still LOW,
+ * read data until interrupt pin is released.*/
+ if (!ret)
+ hrtimer_start(&ts->timer, ktime_set(0, TIMER_NS),
+ HRTIMER_MODE_REL);
+ else {
+ /*clear for interrupt*/
+ if (irqd_irq_disabled(&ts->desc->irq_data))
+ enable_irq(ts->client->irq);
+ }
+#else /*case 2 mode*/
+ if (irqd_irq_disabled(&ts->desc->irq_data))
+ enable_irq(ts->client->irq);
+#endif
+ }
+
+ mutex_unlock(&ts->mutex_wq);
+}
+
+static void sis_tpinfo_clear(struct sisTP_driver_data *TPInfo, int max)
+{
+ int i = 0;
+
+ for (i = 0; i < max; i++) {
+ TPInfo->pt[i].id = -1;
+ TPInfo->pt[i].x = 0;
+ TPInfo->pt[i].y = 0;
+ TPInfo->pt[i].Pressure = 0;
+ TPInfo->pt[i].Width = 0;
+ }
+ TPInfo->id = 0x0;
+ TPInfo->fingers = 0;
+}
+
+static enum hrtimer_restart sis_ts_timer_func(struct hrtimer *timer) {
+ struct sis_ts_data *ts = container_of(timer, struct sis_ts_data,
+timer);
+
+ queue_work(sis_wq, &ts->work);
+ if (!ts->use_irq) /*For Polling mode*/
+ hrtimer_start(&ts->timer, ktime_set(0, TIMER_NS), HRTIMER_MODE_REL);
+ return HRTIMER_NORESTART;
+}
+
+static irqreturn_t sis_ts_irq_handler(int irq, void *dev_id) {
+ struct sis_ts_data *ts = dev_id;
+
+ if (!irqd_irq_disabled(&ts->desc->irq_data))
+ disable_irq_nosync(ts->client->irq);
+ queue_work(sis_wq, &ts->work);
+ return IRQ_HANDLED;
+}
+
+static int initial_irq(void)
+{
+ int ret = 0;
+
+ /* initialize gpio and interrupt pins */
+ /*ex. GPIO_133 for interrupt mode*/
+ ret = gpio_request(GPIO_IRQ, "GPIO_54");
+ if (ret < 0) {
+ /*Set Active Low.
+ * Please reference the file include/linux/interrupt.h*/
+ pr_err("sis_ts_probe: Failed to gpio_request\n");
+ pr_err("sis_ts_probe: Fail : gpio_request was called before this driver call\n");
+ }
+ /* setting gpio direction here OR boardinfo file*/
+ return ret;
+}
+
+static int sis_ts_probe(
+ struct i2c_client *client, const struct i2c_device_id *id) {
+ int ret = 0;
+ struct sis_ts_data *ts = NULL;
+ struct sis_i2c_rmi_platform_data *pdata = NULL;
+
+ pr_info("sis_ts_probe\n");
+ ts = kzalloc(sizeof(struct sis_ts_data), GFP_KERNEL);
+ if (ts == NULL) {
+ ret = -ENOMEM;
+ goto err_alloc_data_failed;
+ }
+ ts->TPInfo = kzalloc(sizeof(struct sisTP_driver_data), GFP_KERNEL);
+ if (ts->TPInfo == NULL) {
+ ret = -ENOMEM;
+ goto err_alloc_data_failed;
+ }
+ ts_bak = ts;
+
+ mutex_init(&ts->mutex_wq);
+ /*1. Init Work queue and necessary buffers*/
+ INIT_WORK(&ts->work, sis_ts_work_func);
+ ts->client = client;
+ i2c_set_clientdata(client, ts);
+ pdata = client->dev.platform_data;
+ if (pdata)
+ ts->power = pdata->power;
+ if (ts->power) {
+ ret = ts->power(1);
+ if (ret < 0) {
+ pr_err("sis_ts_probe power on failed\n");
+ goto err_power_failed;
+ }
+ }
+ /*2. Allocate input device*/
+ ts->input_dev = input_allocate_device();
+ if (ts->input_dev == NULL) {
+ ret = -ENOMEM;
+ pr_err("sis_ts_probe: Failed to allocate input device\n");
+ goto err_input_dev_alloc_failed;
+ }
+ /*This input device name should be the same to IDC file name.*/
+ ts->input_dev->name = "sis_touch";
+
+ set_bit(EV_ABS, ts->input_dev->evbit);
+ set_bit(EV_KEY, ts->input_dev->evbit);
+ set_bit(ABS_MT_POSITION_X, ts->input_dev->absbit);
+ set_bit(ABS_MT_POSITION_Y, ts->input_dev->absbit);
+ set_bit(ABS_MT_PRESSURE, ts->input_dev->absbit);
+ set_bit(ABS_MT_TOUCH_MAJOR, ts->input_dev->absbit);
+ set_bit(ABS_MT_TOUCH_MINOR, ts->input_dev->absbit);
+
+ input_mt_init_slots(ts->input_dev, MAX_SLOTS, INPUT_MT_DIRECT);
+
+ input_set_abs_params(ts->input_dev, ABS_MT_PRESSURE,
+ 0, PRESSURE_MAX, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR,
+ 0, AREA_LENGTH_LONGER, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MINOR,
+ 0, AREA_LENGTH_SHORT, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X,
+ 0, SIS_MAX_X, 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y,
+ 0, SIS_MAX_Y, 0, 0);
+
+ /* add for touch keys */
+ set_bit(KEY_COMPOSE, ts->input_dev->keybit);
+ set_bit(KEY_BACK, ts->input_dev->keybit);
+ set_bit(KEY_MENU, ts->input_dev->keybit);
+ set_bit(KEY_HOME, ts->input_dev->keybit);
+ /*3. Register input device to core*/
+ ret = input_register_device(ts->input_dev);
+ if (ret) {
+ pr_err("sis_ts_probe: Unable to register %s input device\n",
+ ts->input_dev->name);
+ goto err_input_register_device_failed;
+ }
+ /*4. irq or timer setup*/
+ ret = initial_irq();
+ if (ret >= 0) {
+ client->irq = gpio_to_irq(GPIO_IRQ);
+ ret = request_irq(client->irq, sis_ts_irq_handler,
+ IRQF_TRIGGER_FALLING, client->name, ts);
+ if (ret == 0)
+ ts->use_irq = 1;
+ else
+ dev_err(&client->dev, "request_irq failed\n");
+ }
+ ts->desc = irq_to_desc(ts_bak->client->irq);
+ hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ ts->timer.function = sis_ts_timer_func;
+ if (!ts->use_irq)
+ hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
+ pr_info("sis_ts_probe: Start touchscreen %s in %s mode\n",
+ ts->input_dev->name,
+ ts->use_irq ? "interrupt" : "polling");
+ if (ts->use_irq) {
+#ifdef _INT_MODE_1
+ pr_info("sis_ts_probe: interrupt case 1 mode\n"); #else
+ pr_info("sis_ts_probe: interrupt case 2 mode\n"); #endif
+ }
+ pr_info("sis SIS_SLAVE_ADDR: %d\n", SIS_SLAVE_ADDR);
+ return 0;
+err_input_register_device_failed:
+ input_free_device(ts->input_dev);
+err_input_dev_alloc_failed:
+err_power_failed:
+ kfree(ts->TPInfo);
+ kfree(ts);
+err_alloc_data_failed:
+ return ret;
+}
+
+static int sis_ts_remove(struct i2c_client *client) {
+ struct sis_ts_data *ts = i2c_get_clientdata(client);
+
+ if (ts->use_irq)
+ free_irq(client->irq, ts);
+ else
+ hrtimer_cancel(&ts->timer);
+ input_unregister_device(ts->input_dev);
+ kfree(ts);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sis_ts_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ int ret = 0;
+ struct sis_ts_data *ts = i2c_get_clientdata(client);
+
+ if (ts->use_irq) {
+ if (!irqd_irq_disabled(&ts->desc->irq_data))
+ disable_irq(client->irq);
+ } else
+ hrtimer_cancel(&ts->timer);
+ flush_workqueue(sis_wq); /*only flush sis_wq*/
+
+
+ if (ts->power) {
+ ret = ts->power(0);
+ if (ret < 0)
+ pr_err("sis_ts_suspend power off failed\n");
+ }
+
+ return 0;
+}
+
+static int sis_ts_resume(struct i2c_client *client) {
+ int ret = 0;
+ struct sis_ts_data *ts = i2c_get_clientdata(client);
+
+ if (ts->power) {
+ ret = ts->power(1);
+ if (ret < 0)
+ pr_err("sis_ts_resume power on failed\n");
+ }
+
+ if (ts->use_irq) {
+ if (irqd_irq_disabled(&ts->desc->irq_data))
+ enable_irq(client->irq);
+ } else
+ hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(sis_ts_pm, sis_ts_suspend, sis_ts_resume);
+
+#ifdef CONFIG_X86
+/* Return 0 if detection is successful, -ENODEV otherwise */ static int
+sis_ts_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
+{
+ const char *type_name;
+
+ pr_info("sis_ts_detect\n");
+ type_name = "sis_i2c_ts";
+ strlcpy(info->type, type_name, I2C_NAME_SIZE);
+ return 0;
+}
+#endif
+
+static const struct i2c_device_id sis_ts_id[] = {
+ { SIS_I2C_NAME, 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, sis_ts_id);
+
+static struct i2c_driver sis_ts_driver = {
+ .driver = {
+ .name = SIS_I2C_NAME,
+ .pm = &sis_ts_pm,
+ },
+ .probe = sis_ts_probe,
+ .remove = sis_ts_remove,
+#ifdef CONFIG_X86
+ .class = I2C_CLASS_HWMON,
+ .detect = sis_ts_detect,
+ .address_list = normal_i2c,
+#endif
+ .id_table = sis_ts_id,
+};
+
+static int __init sis_ts_init(void)
+{
+ pr_info("sis_ts_init\n");
+ sis_wq = create_singlethread_workqueue("sis_wq");
+
+ if (!sis_wq)
+ return -ENOMEM;
+ return i2c_add_driver(&sis_ts_driver); }
+
+static void __exit sis_ts_exit(void)
+{
+ pr_info("sis_ts_exit\n");
+ i2c_del_driver(&sis_ts_driver);
+ if (sis_wq)
+ destroy_workqueue(sis_wq);
+}
+
+module_init(sis_ts_init);
+module_exit(sis_ts_exit);
+MODULE_DESCRIPTION("SiS 9200 Family Touchscreen Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/sis_i2c.h b/drivers/input/touchscreen/sis_i2c.h
new file mode 100644
index 0000000..a075158
--- /dev/null
+++ b/drivers/input/touchscreen/sis_i2c.h
@@ -0,0 +1,164 @@
+/*
+ * Touch Screen driver for SiS 9200 family I2C Touch panels
+ *
+ * Copyright (C) 2015 SiS, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ * Date: 2015/07/07
+ */
+#include <linux/version.h>
+
+#ifndef _LINUX_SIS_I2C_H
+#define _LINUX_SIS_I2C_H
+
+
+#define SIS_I2C_NAME "sis_i2c_ts"
+#define SIS_SLAVE_ADDR 0x5c
+/*10ms*/
+#define TIMER_NS 10000000
+#define MAX_FINGERS 10
+
+/* Check data CRC */
+/*#define _CHECK_CRC*/ /*ON/OFF*/
+
+/* Interrupt modes */
+#define GPIO_IRQ 54
+
+/* Enable if use interrupt case 1 mode. */
+/* Disable if use interrupt case 2 mode. */
+/*#define _INT_MODE_1*/ /*ON/OFF*/
+
+/* Resolution mode */
+/*Constant value*/
+#define SIS_MAX_X 4095
+#define SIS_MAX_Y 4095
+
+#define ONE_BYTE 1
+#define FIVE_BYTE 5
+#define EIGHT_BYTE 8
+#define SIXTEEN_BYTE 16
+#define PACKET_BUFFER_SIZE 128
+
+#define SIS_CMD_NORMAL 0x0
+#define SIS_CMD_SOFTRESET 0x82
+#define SIS_CMD_RECALIBRATE 0x87
+#define SIS_CMD_POWERMODE 0x90
+#define MSK_TOUCHNUM 0x0f
+#define MSK_HAS_CRC 0x10
+#define MSK_DATAFMT 0xe0
+#define MSK_PSTATE 0x0f
+#define MSK_PID 0xf0
+#define RES_FMT 0x00
+#define FIX_FMT 0x40
+
+/* for new i2c format */
+#define TOUCHDOWN 0x3
+#define TOUCHUP 0x0
+#define MAX_BYTE 64
+#define PRESSURE_MAX 255
+
+/*Resolution diagonal */
+#define AREA_LENGTH_LONGER 5792
+/*((SIS_MAX_X^2) + (SIS_MAX_Y^2))^0.5*/
+#define AREA_LENGTH_SHORT 5792
+#define AREA_UNIT (5792/32)
+
+
+#define FORMAT_MODE 1
+
+#define MSK_NOBTN 0
+#define MSK_COMP 1
+#define MSK_BACK 2
+#define MSK_MENU 4
+#define MSK_HOME 8
+
+#define P_BYTECOUNT 0
+#define ALL_IN_ONE_PACKAGE 0x10
+#define IS_TOUCH(x) (x & 0x1)
+#define IS_HIDI2C(x) ((x & 0xF) == 0x06)
+#define IS_AREA(x) ((x >> 4) & 0x1)
+#define IS_PRESSURE(x) ((x >> 5) & 0x1)
+#define IS_SCANTIME(x) ((x >> 6) & 0x1)
+#define NORMAL_LEN_PER_POINT 6
+#define AREA_LEN_PER_POINT 2
+#define PRESSURE_LEN_PER_POINT 1
+
+#define TOUCH_FORMAT 0x1
+#define BUTTON_FORMAT 0x4
+#define HIDI2C_FORMAT 0x6
+#define P_REPORT_ID 2
+#define BUTTON_STATE 3
+#define BUTTON_KEY_COUNT 16
+#define BYTE_BYTECOUNT 2
+#define BYTE_COUNT 1
+#define BYTE_ReportID 1
+#define BYTE_CRC_HIDI2C 0
+#define BYTE_CRC_I2C 2
+#define BYTE_SCANTIME 2
+#define NO_TOUCH_BYTECOUNT 0x3
+
+/* TODO */
+#define TOUCH_POWER_PIN 0
+#define TOUCH_RESET_PIN 1
+
+/* CMD Define */
+#define BUF_ACK_PLACE_L 4
+#define BUF_ACK_PLACE_H 5
+#define BUF_ACK_L 0xEF
+#define BUF_ACK_H 0xBE
+#define BUF_NACK_L 0xAD
+#define BUF_NACK_H 0xDE
+#define BUF_CRC_PLACE 7
+#define MAX_SLOTS 15
+
+struct sis_i2c_rmi_platform_data {
+ int (*power)(int on); /* Only valid in first array entry */
+};
+
+struct TypeB_Slot {
+ int CheckID;
+ int id;
+ unsigned short x, y;
+ uint16_t Pressure;
+ uint16_t Width;
+ uint16_t Height;
+};
+
+struct Point {
+ int id;
+ unsigned short x, y; /*uint16_t ?*/
+ uint16_t Pressure;
+ uint16_t Width;
+ uint16_t Height;
+};
+
+struct sisTP_driver_data {
+ int id;
+ int fingers;
+ struct Point pt[MAX_FINGERS];
+};
+
+struct sis_ts_data {
+ int (*power)(int on);
+ int use_irq;
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ struct hrtimer timer;
+ struct irq_desc *desc;
+ struct work_struct work;
+ struct mutex mutex_wq;
+ struct sisTP_driver_data *TPInfo;
+};
+
+static int sis_ts_suspend(struct i2c_client *client, pm_message_t
+mesg); static int sis_ts_resume(struct i2c_client *client);
+
+#endif /* _LINUX_SIS_I2C_H */
--
1.9.1
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