676 lines
16 KiB
C
676 lines
16 KiB
C
/* board-htcleo-ts.c
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*
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* Copyright (C) 2010 Cotulla
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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//#define DEBUG
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#include <linux/delay.h>
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#include <linux/earlysuspend.h>
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#include <linux/hrtimer.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <asm/gpio.h>
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#include "board-htcleo.h"
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#include "board-htcleo-ts.h"
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#include "gpio_chip.h"
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#define TOUCH_TYPE_UNKNOWN 0
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#define TOUCH_TYPE_B8 1
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#define TOUCH_TYPE_68 2
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#define TOUCH_TYPE_2A 3
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#define LEO_TYPE_1 1
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#define LEO_TYPE_2 2
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#define LEO_TYPE_3 3
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#define TYPE_68_DEVID (0x68 >> 1)
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#define TYPE_B8_DEVID (0xB8 >> 1)
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#define TYPE_2A_DEVID (0x2A >> 1)
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#define MAKEWORD(a, b) ((uint16_t)(((uint8_t)(a)) | ((uint16_t)((uint8_t)(b))) << 8))
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struct leo_ts_data
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{
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struct i2c_client *client;
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struct input_dev *input_dev;
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uint32_t prev_ptcount;
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int ts_type;
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int intr_type; // 0 - FAILING, 1- RISING
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int pressed1;
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int pressed2;
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struct work_struct work;
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uint16_t version;
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struct early_suspend early_suspend;
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};
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struct workqueue_struct *leo_touch_wq;
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#ifdef CONFIG_HAS_EARLYSUSPEND
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static void leo_ts_early_suspend(struct early_suspend *h);
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static void leo_ts_late_resume(struct early_suspend *h);
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#endif
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static int I2C_Read(struct leo_ts_data *ts, uint8_t dev, uint8_t addr, uint32_t sz, uint8_t* bf)
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{
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struct i2c_msg msg[2];
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int ret = 0;
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msg[0].addr = dev;
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msg[0].flags = 0;
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msg[0].len = 1;
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msg[0].buf = &addr;
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msg[1].addr = dev;
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msg[1].flags = I2C_M_RD;
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msg[1].len = sz;
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msg[1].buf = bf;
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ret = i2c_transfer(ts->client->adapter, msg, 2);
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if (ret < 0)
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{
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dev_dbg(&ts->client->dev, "TS: I2C_Read(%x %x) failed!\n", dev, addr);
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return 0;
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}
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return 1;
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}
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static int I2C_ReadNo(struct leo_ts_data *ts, uint8_t dev, uint32_t sz, uint8_t* bf)
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{
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struct i2c_msg msg[1];
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int ret = 0;
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msg[0].addr = dev;
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msg[0].flags = I2C_M_RD;
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msg[0].len = sz;
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msg[0].buf = bf;
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ret = i2c_transfer(ts->client->adapter, msg, 1);
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if (ret < 0)
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{
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dev_dbg(&ts->client->dev, "TS: I2C_ReadNo(%x) failed!\n", dev);
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return 0;
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}
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return 1;
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}
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static int leo_detect_ts_type(struct leo_ts_data *ts)
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{
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uint8_t bt[4];
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ts->ts_type = TOUCH_TYPE_UNKNOWN;
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if (I2C_Read(ts, TYPE_B8_DEVID, 0x00, 1, bt))
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{
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dev_dbg(&ts->client->dev, "TS: DETECTED TYPE B8\n");
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ts->ts_type = TOUCH_TYPE_B8;
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return 1;
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}
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if (I2C_Read(ts, TYPE_68_DEVID, 0x00, 1, bt))
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{
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dev_dbg(&ts->client->dev, "TS: DETECTED TYPE 68\n");
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ts->ts_type = TOUCH_TYPE_68;
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return 1;
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}
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if (I2C_ReadNo(ts, TYPE_2A_DEVID, 4, bt) && bt[0] == 0x55)
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{
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dev_dbg(&ts->client->dev, "TS: DETECTED TYPE 2A\n");
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ts->ts_type = TOUCH_TYPE_2A;
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return 1;
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}
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dev_dbg(&ts->client->dev, "TS: NOT DETECTED\n");
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return -1;
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}
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static int leo_reset_ts(struct leo_ts_data *ts)
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{
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// only for XC
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gpio_direction_output(HTCLEO_GPIO_TS_SEL, 1);
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gpio_direction_output(HTCLEO_GPIO_TS_POWER, 0);
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msleep(100);
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gpio_direction_input(HTCLEO_GPIO_TS_IRQ);
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// gpio_configure(92, GPIOF_INPUT | IRQF_TRIGGER_FALLING);
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while (gpio_get_value(HTCLEO_GPIO_TS_POWER))
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{
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gpio_set_value(HTCLEO_GPIO_TS_SEL, 1);
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gpio_set_value(HTCLEO_GPIO_TS_POWER, 0);
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gpio_set_value(82, 0);
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gpio_set_value(27, 0);
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msleep(10);
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}
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gpio_set_value(82, 1);
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gpio_set_value(27, 1);
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while (!gpio_get_value(HTCLEO_GPIO_TS_POWER))
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{
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gpio_set_value(HTCLEO_GPIO_TS_POWER, 1);
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}
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msleep(20);
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while (gpio_get_value(HTCLEO_GPIO_TS_IRQ))
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{
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msleep(10);
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}
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while (gpio_get_value(HTCLEO_GPIO_TS_SEL))
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{
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gpio_set_value(HTCLEO_GPIO_TS_SEL, 0);
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}
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dev_dbg(&ts->client->dev, "TS: reset done\n");
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return 1;
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}
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static int leo_init_ts(struct leo_ts_data *ts)
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{
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uint8_t bt[6];
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struct i2c_msg msg;
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int ret;
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switch (ts->ts_type)
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{
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case TOUCH_TYPE_2A:
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bt[0] = 0xD0;
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bt[1] = 0x00;
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bt[2] = 0x01;
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msg.addr = 0x2A >> 1;
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msg.flags = 0;
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msg.len = 3;
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msg.buf = bt;
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ret = i2c_transfer(ts->client->adapter, &msg, 1);
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if (ret < 0)
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{
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goto error;
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}
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break;
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default:
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dev_dbg(&ts->client->dev, "TS: wrong type %x\n", ts->ts_type);
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goto error;
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}
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dev_dbg(&ts->client->dev, "TS: init done\n");
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return 1;
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error:
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return -1;
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}
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static void leo_deinit_ts(void)
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{
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gpio_set_value(HTCLEO_GPIO_TS_POWER, 0);
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}
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static int leo_init_intr(struct leo_ts_data *ts)
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{
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switch (ts->ts_type)
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{
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case TOUCH_TYPE_B8:
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ts->intr_type = 1;
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break;
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case TOUCH_TYPE_68:
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case TOUCH_TYPE_2A:
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ts->intr_type = 0;
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break;
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default:
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dev_dbg(&ts->client->dev, "TS: wrong type %x\n", ts->ts_type);
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ts->intr_type = 0;
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goto error;
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}
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return 1;
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error:
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return -1;
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}
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static void leo_ts_work_func(struct work_struct *work)
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{
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uint8_t buf[9];
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uint32_t ptcount;
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uint32_t ptx[2];
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uint32_t pty[2];
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struct leo_ts_data *ts = container_of(work, struct leo_ts_data, work);
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uint8_t finger2_pressed;
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int pressed1, pressed2;
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ptcount = 0;
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switch (ts->ts_type)
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{
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case TOUCH_TYPE_2A:
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if (!I2C_ReadNo(ts, TYPE_2A_DEVID, 9, buf))
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{
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dev_dbg(&ts->client->dev, "TS: ReadPos failed\n");
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goto error;
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}
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if (buf[0] != 0x5A)
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{
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dev_dbg(&ts->client->dev, "TS: ReadPos wrmark\n");
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goto error;
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}
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ptcount = (buf[8] >> 1) & 3;
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if (ptcount > 2)
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{
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ptcount = 2;
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}
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if (ptcount >= 1)
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{
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ptx[0] = MAKEWORD(buf[2], (buf[1] & 0xF0) >> 4);
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pty[0] = MAKEWORD(buf[3], (buf[1] & 0x0F) >> 0);
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}
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if (ptcount == 2)
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{
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ptx[1] = MAKEWORD(buf[5], (buf[4] & 0xF0) >> 4);
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pty[1] = MAKEWORD(buf[6], (buf[4] & 0x0F) >> 0);
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}
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break;
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default:
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dev_dbg(&ts->client->dev, "TS: wrong type %x\n", ts->ts_type);
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goto error;
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}
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if (ptcount == 0)
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dev_dbg(&ts->client->dev, "TS: not pressed\n");
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else if (ptcount == 1)
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dev_dbg(&ts->client->dev, "TS: pressed1 (%d, %d)\n", ptx[0], pty[0]);
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else if (ptcount == 2)
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dev_dbg(&ts->client->dev, "TS: pressed2 (%d, %d) (%d, %d)\n", ptx[0], pty[0], ptx[1], pty[1]);
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else
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dev_dbg(&ts->client->dev, "TS: BUGGY!\n");
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if (ptcount == 0)
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{
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pressed1 = 0;
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pressed2 = 0;
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}
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else if (ptcount == 1)
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{
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pressed1 = 1;
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pressed2 = 0;
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}
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else if (ptcount == 2)
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{
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pressed1 = 1;
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pressed2 = 1;
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}
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else
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{
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pressed1 = 0;
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pressed2 = 0;
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}
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if (pressed1)
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{
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dev_dbg(&ts->client->dev, "pressed1\n");
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input_report_abs(ts->input_dev, ABS_X, ptx[0]);
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input_report_abs(ts->input_dev, ABS_Y, pty[0]);
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input_report_abs(ts->input_dev, ABS_PRESSURE, 100);
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input_report_abs(ts->input_dev, ABS_TOOL_WIDTH, 1);
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input_report_key(ts->input_dev, BTN_TOUCH, 1);
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#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
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input_report_abs(ts->input_dev, ABS_MT_POSITION_X, ptx[0]);
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input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, pty[0]);
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input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 100);
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input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0);
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#endif
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}
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else if (ts->pressed1)
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{
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dev_dbg(&ts->client->dev, "unpressed1\n");
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input_report_abs(ts->input_dev, ABS_X, ptx[0]);
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input_report_abs(ts->input_dev, ABS_Y, pty[0]);
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input_report_abs(ts->input_dev, ABS_PRESSURE, 0);
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input_report_abs(ts->input_dev, ABS_TOOL_WIDTH, 0);
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input_report_key(ts->input_dev, BTN_TOUCH, 0);
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#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
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input_report_abs(ts->input_dev, ABS_MT_POSITION_X, ptx[0]);
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input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, pty[0]);
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input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
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input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0);
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#endif
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}
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#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
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input_mt_sync(ts->input_dev);
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if (pressed2)
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{
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dev_dbg(&ts->client->dev, "pressed2\n");
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input_report_abs(ts->input_dev, ABS_MT_POSITION_X, ptx[1]);
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input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, pty[1]);
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input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 100);
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input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0);
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}
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else if (ts->pressed2)
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{
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dev_dbg(&ts->client->dev, "unpressed2\n");
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input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
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}
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input_mt_sync(ts->input_dev);
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#endif
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input_sync(ts->input_dev);
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ts->pressed1 = pressed1;
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ts->pressed2 = pressed2;
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error:
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ts->prev_ptcount = ptcount;
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/* prepare for next intr */
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enable_irq(ts->client->irq);
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}
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static irqreturn_t leo_ts_irq_handler(int irq, void *dev_id)
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{
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struct leo_ts_data *ts = dev_id;
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disable_irq_nosync(ts->client->irq);
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queue_work(leo_touch_wq, &ts->work);
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return IRQ_HANDLED;
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}
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////////////////////////////////////////////////////////////////////////////
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static int leo_ts_probe(struct i2c_client *client, const struct i2c_device_id *id)
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{
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struct leo_ts_data *ts;
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int ret = 0;
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int x_start, y_start, x_end, y_end;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
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{
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dev_err(&client->dev, "need I2C_FUNC_I2C\n");
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ret = -ENODEV;
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goto err_check_functionality_failed;
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}
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ts = kzalloc(sizeof(struct leo_ts_data), GFP_KERNEL);
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if (ts == NULL)
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{
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dev_err(&client->dev, "allocate leo_ts_data failed\n");
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ret = -ENOMEM;
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goto err_alloc_data_failed;
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}
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INIT_WORK(&ts->work, leo_ts_work_func);
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ts->client = client;
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i2c_set_clientdata(client, ts);
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ts->prev_ptcount = 0;
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gpio_request(HTCLEO_GPIO_TS_POWER, "htcleo_ts");
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gpio_request(HTCLEO_GPIO_TS_SEL, "htcleo_ts");
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gpio_request(HTCLEO_GPIO_TS_IRQ, "htcleo_ts");
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gpio_request(82, "htcleo_ts");
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gpio_request(27, "htcleo_ts");
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ret = leo_reset_ts(ts);
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if (ret < 0)
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{
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dev_err(&client->dev, "TS: leo_reset_ts() failed\n");
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goto err_detect_failed;
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}
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ret = leo_detect_ts_type(ts);
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if (ret < 0)
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{
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dev_err(&client->dev, "TS: leo_detect_ts_type() failed\n");
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goto err_detect_failed;
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}
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// !!!other types are not supported yet!!!
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if (ts->ts_type == TOUCH_TYPE_68 || ts->ts_type == TOUCH_TYPE_B8)
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{
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dev_err(&ts->client->dev, "TS: NOT SUPPORTED\n");
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BUG();
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}
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ret = leo_init_ts(ts);
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if (ret < 0)
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{
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dev_err(&client->dev, "TS: leo_init_ts() failed\n");
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goto err_detect_failed;
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}
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ret = leo_init_intr(ts);
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if (ret < 0)
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{
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dev_err(&client->dev, "TS: leo_init_intr() failed\n");
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goto err_detect_failed;
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}
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ts->input_dev = input_allocate_device();
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if (ts->input_dev == NULL)
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{
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ret = -ENOMEM;
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dev_err(&client->dev, "Failed to allocate input device\n");
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goto err_input_dev_alloc_failed;
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}
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ts->input_dev->name = "leo-touchscreen";
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// inital touch calibraion
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switch (ts->ts_type)
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{
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case TOUCH_TYPE_2A:
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x_start = 6;
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y_start = 6;
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x_end = 576;
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y_end = 952;
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break;
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}
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set_bit(EV_SYN, ts->input_dev->evbit);
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set_bit(EV_ABS, ts->input_dev->evbit);
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set_bit(EV_KEY, ts->input_dev->evbit);
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input_set_capability(ts->input_dev, EV_KEY, BTN_TOUCH);
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#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
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input_set_capability(ts->input_dev, EV_KEY, BTN_2);
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#endif
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input_set_abs_params(ts->input_dev, ABS_X, x_start, x_end, 5, 0);
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input_set_abs_params(ts->input_dev, ABS_Y, y_start, y_end, 5, 0);
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input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 255, 0, 0);
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input_set_abs_params(ts->input_dev, ABS_TOOL_WIDTH, 0, 5, 0, 0);
|
|
#ifdef CONFIG_HTCLEO_ENABLE_MULTI_TOUCH
|
|
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, x_start, x_end, 5, 0);
|
|
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, y_start, y_end, 5, 0);
|
|
input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
|
|
input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 1, 0, 0);
|
|
#endif
|
|
// input_set_abs_params(ts->input_dev, ABS_HAT0X, x_start, x_end, 0, 0);
|
|
// input_set_abs_params(ts->input_dev, ABS_HAT0Y, y_start, y_end, 0, 0);
|
|
// input_set_abs_params(ts->input_dev, ABS_PRESSURE, pdata->abs_pressure_min, pdata->abs_pressure_max, 0, 0);
|
|
// input_set_abs_params(ts->input_dev, ABS_TOOL_WIDTH, pdata->abs_width_min, pdata->abs_width_max, 0, 0);
|
|
|
|
ret = input_register_device(ts->input_dev);
|
|
if (ret)
|
|
{
|
|
dev_err(&client->dev,
|
|
"leo_ts_probe: Unable to register %s input device\n",
|
|
ts->input_dev->name);
|
|
goto err_input_register_device_failed;
|
|
}
|
|
|
|
ts->client->irq = gpio_to_irq(HTCLEO_GPIO_TS_IRQ);
|
|
ret = request_irq(ts->client->irq, leo_ts_irq_handler,
|
|
ts->intr_type ? IRQF_TRIGGER_HIGH : IRQF_TRIGGER_LOW,
|
|
LEO_TOUCH_DRV_NAME, ts);
|
|
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
|
|
ts->early_suspend.suspend = leo_ts_early_suspend;
|
|
ts->early_suspend.resume = leo_ts_late_resume;
|
|
register_early_suspend(&ts->early_suspend);
|
|
#endif
|
|
|
|
dev_info(&client->dev, "Start touchscreen %s\n", ts->input_dev->name);
|
|
|
|
return 0;
|
|
|
|
err_input_register_device_failed:
|
|
input_free_device(ts->input_dev);
|
|
|
|
err_input_dev_alloc_failed:
|
|
// POWER OFF
|
|
leo_deinit_ts();
|
|
err_detect_failed:
|
|
kfree(ts);
|
|
|
|
err_alloc_data_failed:
|
|
err_check_functionality_failed:
|
|
return ret;
|
|
}
|
|
|
|
|
|
|
|
static int leo_ts_remove(struct i2c_client *client)
|
|
{
|
|
struct leo_ts_data *ts = i2c_get_clientdata(client);
|
|
|
|
unregister_early_suspend(&ts->early_suspend);
|
|
|
|
free_irq(client->irq, ts);
|
|
|
|
input_unregister_device(ts->input_dev);
|
|
kfree(ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int leo_ts_suspend(struct i2c_client *client, pm_message_t mesg)
|
|
{
|
|
struct leo_ts_data *ts = i2c_get_clientdata(client);
|
|
int ret;
|
|
|
|
disable_irq_nosync(client->irq);
|
|
|
|
ret = cancel_work_sync(&ts->work);
|
|
if (ret)
|
|
{
|
|
enable_irq(client->irq);
|
|
}
|
|
|
|
// POWER OFF
|
|
leo_deinit_ts();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int leo_ts_resume(struct i2c_client *client)
|
|
{
|
|
struct leo_ts_data *ts = i2c_get_clientdata(client);
|
|
|
|
// POWER ON
|
|
leo_reset_ts(ts);
|
|
leo_detect_ts_type(ts);
|
|
leo_init_ts(ts);
|
|
leo_init_intr(ts);
|
|
|
|
enable_irq(client->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_HAS_EARLYSUSPEND
|
|
static void leo_ts_early_suspend(struct early_suspend *h)
|
|
{
|
|
struct leo_ts_data *ts;
|
|
ts = container_of(h, struct leo_ts_data, early_suspend);
|
|
leo_ts_suspend(ts->client, PMSG_SUSPEND);
|
|
}
|
|
|
|
static void leo_ts_late_resume(struct early_suspend *h)
|
|
{
|
|
struct leo_ts_data *ts;
|
|
ts = container_of(h, struct leo_ts_data, early_suspend);
|
|
leo_ts_resume(ts->client);
|
|
}
|
|
#endif
|
|
|
|
|
|
static const struct i2c_device_id leo_ts_id[] =
|
|
{
|
|
{ LEO_TOUCH_DRV_NAME, 0 },
|
|
{ }
|
|
};
|
|
|
|
|
|
static struct i2c_driver leo_ts_driver =
|
|
{
|
|
.driver =
|
|
{
|
|
.name = LEO_TOUCH_DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.id_table = leo_ts_id,
|
|
.probe = leo_ts_probe,
|
|
.remove = leo_ts_remove,
|
|
#ifndef CONFIG_HAS_EARLYSUSPEND
|
|
.suspend = leo_ts_suspend,
|
|
.resume = leo_ts_resume,
|
|
#endif
|
|
};
|
|
|
|
|
|
static int __devinit leo_ts_init(void)
|
|
{
|
|
leo_touch_wq = create_singlethread_workqueue("leo_touch_wq");
|
|
if (!leo_touch_wq)
|
|
{
|
|
return -ENOMEM;
|
|
}
|
|
return i2c_add_driver(&leo_ts_driver);
|
|
}
|
|
|
|
static void __exit leo_ts_exit(void)
|
|
{
|
|
if (leo_touch_wq)
|
|
{
|
|
destroy_workqueue(leo_touch_wq);
|
|
leo_touch_wq = NULL;
|
|
}
|
|
i2c_del_driver(&leo_ts_driver);
|
|
}
|
|
|
|
module_init(leo_ts_init);
|
|
module_exit(leo_ts_exit);
|
|
|
|
|
|
MODULE_DESCRIPTION("HTC LEO Touchscreen Support Driver");
|
|
MODULE_LICENSE("GPL");
|