![Bill Pemberton](/assets/img/avatar_default.png)
CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
894 lines
21 KiB
C
894 lines
21 KiB
C
/*
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* Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
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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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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* This is a driver for the EDT "Polytouch" family of touch controllers
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* based on the FocalTech FT5x06 line of chips.
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*
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* Development of this driver has been sponsored by Glyn:
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* http://www.glyn.com/Products/Displays
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*/
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#include <linux/module.h>
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#include <linux/ratelimit.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <linux/i2c.h>
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#include <linux/uaccess.h>
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#include <linux/delay.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/input/mt.h>
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#include <linux/input/edt-ft5x06.h>
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#define MAX_SUPPORT_POINTS 5
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#define WORK_REGISTER_THRESHOLD 0x00
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#define WORK_REGISTER_REPORT_RATE 0x08
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#define WORK_REGISTER_GAIN 0x30
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#define WORK_REGISTER_OFFSET 0x31
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#define WORK_REGISTER_NUM_X 0x33
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#define WORK_REGISTER_NUM_Y 0x34
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#define WORK_REGISTER_OPMODE 0x3c
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#define FACTORY_REGISTER_OPMODE 0x01
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#define TOUCH_EVENT_DOWN 0x00
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#define TOUCH_EVENT_UP 0x01
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#define TOUCH_EVENT_ON 0x02
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#define TOUCH_EVENT_RESERVED 0x03
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#define EDT_NAME_LEN 23
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#define EDT_SWITCH_MODE_RETRIES 10
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#define EDT_SWITCH_MODE_DELAY 5 /* msec */
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#define EDT_RAW_DATA_RETRIES 100
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#define EDT_RAW_DATA_DELAY 1 /* msec */
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struct edt_ft5x06_ts_data {
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struct i2c_client *client;
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struct input_dev *input;
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u16 num_x;
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u16 num_y;
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#if defined(CONFIG_DEBUG_FS)
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struct dentry *debug_dir;
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u8 *raw_buffer;
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size_t raw_bufsize;
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#endif
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struct mutex mutex;
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bool factory_mode;
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int threshold;
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int gain;
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int offset;
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int report_rate;
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char name[EDT_NAME_LEN];
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};
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static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
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u16 wr_len, u8 *wr_buf,
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u16 rd_len, u8 *rd_buf)
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{
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struct i2c_msg wrmsg[2];
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int i = 0;
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int ret;
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if (wr_len) {
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wrmsg[i].addr = client->addr;
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wrmsg[i].flags = 0;
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wrmsg[i].len = wr_len;
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wrmsg[i].buf = wr_buf;
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i++;
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}
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if (rd_len) {
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wrmsg[i].addr = client->addr;
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wrmsg[i].flags = I2C_M_RD;
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wrmsg[i].len = rd_len;
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wrmsg[i].buf = rd_buf;
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i++;
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}
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ret = i2c_transfer(client->adapter, wrmsg, i);
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if (ret < 0)
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return ret;
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if (ret != i)
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return -EIO;
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return 0;
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}
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static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
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u8 *buf, int buflen)
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{
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int i;
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u8 crc = 0;
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for (i = 0; i < buflen - 1; i++)
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crc ^= buf[i];
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if (crc != buf[buflen-1]) {
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dev_err_ratelimited(&tsdata->client->dev,
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"crc error: 0x%02x expected, got 0x%02x\n",
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crc, buf[buflen-1]);
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return false;
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}
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return true;
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}
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static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
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{
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struct edt_ft5x06_ts_data *tsdata = dev_id;
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struct device *dev = &tsdata->client->dev;
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u8 cmd = 0xf9;
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u8 rdbuf[26];
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int i, type, x, y, id;
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int error;
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memset(rdbuf, 0, sizeof(rdbuf));
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error = edt_ft5x06_ts_readwrite(tsdata->client,
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sizeof(cmd), &cmd,
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sizeof(rdbuf), rdbuf);
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if (error) {
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dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
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error);
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goto out;
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}
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if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) {
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dev_err_ratelimited(dev, "Unexpected header: %02x%02x%02x!\n",
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rdbuf[0], rdbuf[1], rdbuf[2]);
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goto out;
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}
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if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, 26))
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goto out;
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for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
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u8 *buf = &rdbuf[i * 4 + 5];
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bool down;
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type = buf[0] >> 6;
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/* ignore Reserved events */
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if (type == TOUCH_EVENT_RESERVED)
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continue;
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x = ((buf[0] << 8) | buf[1]) & 0x0fff;
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y = ((buf[2] << 8) | buf[3]) & 0x0fff;
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id = (buf[2] >> 4) & 0x0f;
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down = (type != TOUCH_EVENT_UP);
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input_mt_slot(tsdata->input, id);
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input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
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if (!down)
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continue;
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input_report_abs(tsdata->input, ABS_MT_POSITION_X, x);
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input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y);
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}
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input_mt_report_pointer_emulation(tsdata->input, true);
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input_sync(tsdata->input);
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out:
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return IRQ_HANDLED;
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}
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static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
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u8 addr, u8 value)
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{
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u8 wrbuf[4];
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wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
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wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
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wrbuf[2] = value;
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wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
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return edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL);
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}
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static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
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u8 addr)
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{
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u8 wrbuf[2], rdbuf[2];
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int error;
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wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
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wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
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wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
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error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, rdbuf);
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if (error)
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return error;
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if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
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dev_err(&tsdata->client->dev,
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"crc error: 0x%02x expected, got 0x%02x\n",
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wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], rdbuf[1]);
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return -EIO;
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}
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return rdbuf[0];
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}
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struct edt_ft5x06_attribute {
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struct device_attribute dattr;
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size_t field_offset;
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u8 limit_low;
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u8 limit_high;
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u8 addr;
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};
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#define EDT_ATTR(_field, _mode, _addr, _limit_low, _limit_high) \
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struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
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.dattr = __ATTR(_field, _mode, \
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edt_ft5x06_setting_show, \
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edt_ft5x06_setting_store), \
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.field_offset = \
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offsetof(struct edt_ft5x06_ts_data, _field), \
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.limit_low = _limit_low, \
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.limit_high = _limit_high, \
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.addr = _addr, \
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}
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static ssize_t edt_ft5x06_setting_show(struct device *dev,
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struct device_attribute *dattr,
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char *buf)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
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struct edt_ft5x06_attribute *attr =
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container_of(dattr, struct edt_ft5x06_attribute, dattr);
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u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
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int val;
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size_t count = 0;
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int error = 0;
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mutex_lock(&tsdata->mutex);
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if (tsdata->factory_mode) {
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error = -EIO;
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goto out;
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}
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val = edt_ft5x06_register_read(tsdata, attr->addr);
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if (val < 0) {
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error = val;
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dev_err(&tsdata->client->dev,
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"Failed to fetch attribute %s, error %d\n",
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dattr->attr.name, error);
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goto out;
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}
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if (val != *field) {
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dev_warn(&tsdata->client->dev,
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"%s: read (%d) and stored value (%d) differ\n",
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dattr->attr.name, val, *field);
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*field = val;
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}
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count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
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out:
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mutex_unlock(&tsdata->mutex);
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return error ?: count;
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}
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static ssize_t edt_ft5x06_setting_store(struct device *dev,
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struct device_attribute *dattr,
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const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
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struct edt_ft5x06_attribute *attr =
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container_of(dattr, struct edt_ft5x06_attribute, dattr);
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u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
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unsigned int val;
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int error;
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mutex_lock(&tsdata->mutex);
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if (tsdata->factory_mode) {
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error = -EIO;
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goto out;
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}
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error = kstrtouint(buf, 0, &val);
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if (error)
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goto out;
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if (val < attr->limit_low || val > attr->limit_high) {
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error = -ERANGE;
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goto out;
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}
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error = edt_ft5x06_register_write(tsdata, attr->addr, val);
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if (error) {
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dev_err(&tsdata->client->dev,
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"Failed to update attribute %s, error: %d\n",
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dattr->attr.name, error);
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goto out;
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}
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*field = val;
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out:
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mutex_unlock(&tsdata->mutex);
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return error ?: count;
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}
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static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 0, 31);
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static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 0, 31);
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static EDT_ATTR(threshold, S_IWUSR | S_IRUGO,
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WORK_REGISTER_THRESHOLD, 20, 80);
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static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO,
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WORK_REGISTER_REPORT_RATE, 3, 14);
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static struct attribute *edt_ft5x06_attrs[] = {
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&edt_ft5x06_attr_gain.dattr.attr,
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&edt_ft5x06_attr_offset.dattr.attr,
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&edt_ft5x06_attr_threshold.dattr.attr,
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&edt_ft5x06_attr_report_rate.dattr.attr,
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NULL
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};
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static const struct attribute_group edt_ft5x06_attr_group = {
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.attrs = edt_ft5x06_attrs,
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};
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#ifdef CONFIG_DEBUG_FS
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static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
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{
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struct i2c_client *client = tsdata->client;
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int retries = EDT_SWITCH_MODE_RETRIES;
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int ret;
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int error;
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disable_irq(client->irq);
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if (!tsdata->raw_buffer) {
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tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
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sizeof(u16);
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tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
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if (!tsdata->raw_buffer) {
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error = -ENOMEM;
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goto err_out;
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}
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}
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/* mode register is 0x3c when in the work mode */
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error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
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if (error) {
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dev_err(&client->dev,
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"failed to switch to factory mode, error %d\n", error);
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goto err_out;
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}
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tsdata->factory_mode = true;
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do {
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mdelay(EDT_SWITCH_MODE_DELAY);
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/* mode register is 0x01 when in factory mode */
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ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
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if (ret == 0x03)
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break;
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} while (--retries > 0);
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if (retries == 0) {
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dev_err(&client->dev, "not in factory mode after %dms.\n",
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EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
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error = -EIO;
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goto err_out;
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}
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return 0;
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err_out:
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kfree(tsdata->raw_buffer);
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tsdata->raw_buffer = NULL;
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tsdata->factory_mode = false;
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enable_irq(client->irq);
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return error;
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}
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static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
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{
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struct i2c_client *client = tsdata->client;
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int retries = EDT_SWITCH_MODE_RETRIES;
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int ret;
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int error;
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/* mode register is 0x01 when in the factory mode */
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error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
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if (error) {
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dev_err(&client->dev,
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"failed to switch to work mode, error: %d\n", error);
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return error;
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}
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tsdata->factory_mode = false;
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do {
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mdelay(EDT_SWITCH_MODE_DELAY);
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/* mode register is 0x01 when in factory mode */
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ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
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if (ret == 0x01)
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break;
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} while (--retries > 0);
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if (retries == 0) {
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dev_err(&client->dev, "not in work mode after %dms.\n",
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EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
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tsdata->factory_mode = true;
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return -EIO;
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}
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if (tsdata->raw_buffer)
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kfree(tsdata->raw_buffer);
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tsdata->raw_buffer = NULL;
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/* restore parameters */
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edt_ft5x06_register_write(tsdata, WORK_REGISTER_THRESHOLD,
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tsdata->threshold);
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edt_ft5x06_register_write(tsdata, WORK_REGISTER_GAIN,
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tsdata->gain);
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edt_ft5x06_register_write(tsdata, WORK_REGISTER_OFFSET,
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tsdata->offset);
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edt_ft5x06_register_write(tsdata, WORK_REGISTER_REPORT_RATE,
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tsdata->report_rate);
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enable_irq(client->irq);
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return 0;
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}
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static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
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{
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struct edt_ft5x06_ts_data *tsdata = data;
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*mode = tsdata->factory_mode;
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return 0;
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};
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static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
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{
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struct edt_ft5x06_ts_data *tsdata = data;
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int retval = 0;
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if (mode > 1)
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return -ERANGE;
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mutex_lock(&tsdata->mutex);
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if (mode != tsdata->factory_mode) {
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retval = mode ? edt_ft5x06_factory_mode(tsdata) :
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edt_ft5x06_work_mode(tsdata);
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}
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mutex_unlock(&tsdata->mutex);
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return retval;
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};
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DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
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edt_ft5x06_debugfs_mode_set, "%llu\n");
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|
|
static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
|
|
char __user *buf, size_t count, loff_t *off)
|
|
{
|
|
struct edt_ft5x06_ts_data *tsdata = file->private_data;
|
|
struct i2c_client *client = tsdata->client;
|
|
int retries = EDT_RAW_DATA_RETRIES;
|
|
int val, i, error;
|
|
size_t read = 0;
|
|
int colbytes;
|
|
char wrbuf[3];
|
|
u8 *rdbuf;
|
|
|
|
if (*off < 0 || *off >= tsdata->raw_bufsize)
|
|
return 0;
|
|
|
|
mutex_lock(&tsdata->mutex);
|
|
|
|
if (!tsdata->factory_mode || !tsdata->raw_buffer) {
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
|
|
if (error) {
|
|
dev_dbg(&client->dev,
|
|
"failed to write 0x08 register, error %d\n", error);
|
|
goto out;
|
|
}
|
|
|
|
do {
|
|
msleep(EDT_RAW_DATA_DELAY);
|
|
val = edt_ft5x06_register_read(tsdata, 0x08);
|
|
if (val < 1)
|
|
break;
|
|
} while (--retries > 0);
|
|
|
|
if (val < 0) {
|
|
error = val;
|
|
dev_dbg(&client->dev,
|
|
"failed to read 0x08 register, error %d\n", error);
|
|
goto out;
|
|
}
|
|
|
|
if (retries == 0) {
|
|
dev_dbg(&client->dev,
|
|
"timed out waiting for register to settle\n");
|
|
error = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
|
|
rdbuf = tsdata->raw_buffer;
|
|
colbytes = tsdata->num_y * sizeof(u16);
|
|
|
|
wrbuf[0] = 0xf5;
|
|
wrbuf[1] = 0x0e;
|
|
for (i = 0; i < tsdata->num_x; i++) {
|
|
wrbuf[2] = i; /* column index */
|
|
error = edt_ft5x06_ts_readwrite(tsdata->client,
|
|
sizeof(wrbuf), wrbuf,
|
|
colbytes, rdbuf);
|
|
if (error)
|
|
goto out;
|
|
|
|
rdbuf += colbytes;
|
|
}
|
|
|
|
read = min_t(size_t, count, tsdata->raw_bufsize - *off);
|
|
if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
|
|
error = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
*off += read;
|
|
out:
|
|
mutex_unlock(&tsdata->mutex);
|
|
return error ?: read;
|
|
};
|
|
|
|
|
|
static const struct file_operations debugfs_raw_data_fops = {
|
|
.open = simple_open,
|
|
.read = edt_ft5x06_debugfs_raw_data_read,
|
|
};
|
|
|
|
static void
|
|
edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
|
|
const char *debugfs_name)
|
|
{
|
|
tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
|
|
if (!tsdata->debug_dir)
|
|
return;
|
|
|
|
debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
|
|
debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
|
|
|
|
debugfs_create_file("mode", S_IRUSR | S_IWUSR,
|
|
tsdata->debug_dir, tsdata, &debugfs_mode_fops);
|
|
debugfs_create_file("raw_data", S_IRUSR,
|
|
tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
|
|
}
|
|
|
|
static void
|
|
edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
|
|
{
|
|
if (tsdata->debug_dir)
|
|
debugfs_remove_recursive(tsdata->debug_dir);
|
|
kfree(tsdata->raw_buffer);
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void
|
|
edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
|
|
const char *debugfs_name)
|
|
{
|
|
}
|
|
|
|
static inline void
|
|
edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_DEBUGFS */
|
|
|
|
|
|
|
|
static int edt_ft5x06_ts_reset(struct i2c_client *client,
|
|
int reset_pin)
|
|
{
|
|
int error;
|
|
|
|
if (gpio_is_valid(reset_pin)) {
|
|
/* this pulls reset down, enabling the low active reset */
|
|
error = gpio_request_one(reset_pin, GPIOF_OUT_INIT_LOW,
|
|
"edt-ft5x06 reset");
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"Failed to request GPIO %d as reset pin, error %d\n",
|
|
reset_pin, error);
|
|
return error;
|
|
}
|
|
|
|
mdelay(50);
|
|
gpio_set_value(reset_pin, 1);
|
|
mdelay(100);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int edt_ft5x06_ts_identify(struct i2c_client *client,
|
|
char *model_name,
|
|
char *fw_version)
|
|
{
|
|
u8 rdbuf[EDT_NAME_LEN];
|
|
char *p;
|
|
int error;
|
|
|
|
error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
|
|
EDT_NAME_LEN - 1, rdbuf);
|
|
if (error)
|
|
return error;
|
|
|
|
/* remove last '$' end marker */
|
|
rdbuf[EDT_NAME_LEN - 1] = '\0';
|
|
if (rdbuf[EDT_NAME_LEN - 2] == '$')
|
|
rdbuf[EDT_NAME_LEN - 2] = '\0';
|
|
|
|
/* look for Model/Version separator */
|
|
p = strchr(rdbuf, '*');
|
|
if (p)
|
|
*p++ = '\0';
|
|
|
|
strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
|
|
strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define EDT_ATTR_CHECKSET(name, reg) \
|
|
if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \
|
|
pdata->name <= edt_ft5x06_attr_##name.limit_high) \
|
|
edt_ft5x06_register_write(tsdata, reg, pdata->name)
|
|
|
|
static void
|
|
edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata,
|
|
const struct edt_ft5x06_platform_data *pdata)
|
|
{
|
|
if (!pdata->use_parameters)
|
|
return;
|
|
|
|
/* pick up defaults from the platform data */
|
|
EDT_ATTR_CHECKSET(threshold, WORK_REGISTER_THRESHOLD);
|
|
EDT_ATTR_CHECKSET(gain, WORK_REGISTER_GAIN);
|
|
EDT_ATTR_CHECKSET(offset, WORK_REGISTER_OFFSET);
|
|
EDT_ATTR_CHECKSET(report_rate, WORK_REGISTER_REPORT_RATE);
|
|
}
|
|
|
|
static void
|
|
edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
|
|
{
|
|
tsdata->threshold = edt_ft5x06_register_read(tsdata,
|
|
WORK_REGISTER_THRESHOLD);
|
|
tsdata->gain = edt_ft5x06_register_read(tsdata, WORK_REGISTER_GAIN);
|
|
tsdata->offset = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OFFSET);
|
|
tsdata->report_rate = edt_ft5x06_register_read(tsdata,
|
|
WORK_REGISTER_REPORT_RATE);
|
|
tsdata->num_x = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_X);
|
|
tsdata->num_y = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_Y);
|
|
}
|
|
|
|
static int edt_ft5x06_ts_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
const struct edt_ft5x06_platform_data *pdata =
|
|
client->dev.platform_data;
|
|
struct edt_ft5x06_ts_data *tsdata;
|
|
struct input_dev *input;
|
|
int error;
|
|
char fw_version[EDT_NAME_LEN];
|
|
|
|
dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
|
|
|
|
if (!pdata) {
|
|
dev_err(&client->dev, "no platform data?\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = edt_ft5x06_ts_reset(client, pdata->reset_pin);
|
|
if (error)
|
|
return error;
|
|
|
|
if (gpio_is_valid(pdata->irq_pin)) {
|
|
error = gpio_request_one(pdata->irq_pin,
|
|
GPIOF_IN, "edt-ft5x06 irq");
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"Failed to request GPIO %d, error %d\n",
|
|
pdata->irq_pin, error);
|
|
return error;
|
|
}
|
|
}
|
|
|
|
tsdata = kzalloc(sizeof(*tsdata), GFP_KERNEL);
|
|
input = input_allocate_device();
|
|
if (!tsdata || !input) {
|
|
dev_err(&client->dev, "failed to allocate driver data.\n");
|
|
error = -ENOMEM;
|
|
goto err_free_mem;
|
|
}
|
|
|
|
mutex_init(&tsdata->mutex);
|
|
tsdata->client = client;
|
|
tsdata->input = input;
|
|
tsdata->factory_mode = false;
|
|
|
|
error = edt_ft5x06_ts_identify(client, tsdata->name, fw_version);
|
|
if (error) {
|
|
dev_err(&client->dev, "touchscreen probe failed\n");
|
|
goto err_free_mem;
|
|
}
|
|
|
|
edt_ft5x06_ts_get_defaults(tsdata, pdata);
|
|
edt_ft5x06_ts_get_parameters(tsdata);
|
|
|
|
dev_dbg(&client->dev,
|
|
"Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
|
|
tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
|
|
|
|
input->name = tsdata->name;
|
|
input->id.bustype = BUS_I2C;
|
|
input->dev.parent = &client->dev;
|
|
|
|
__set_bit(EV_SYN, input->evbit);
|
|
__set_bit(EV_KEY, input->evbit);
|
|
__set_bit(EV_ABS, input->evbit);
|
|
__set_bit(BTN_TOUCH, input->keybit);
|
|
input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
|
|
input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
|
|
input_set_abs_params(input, ABS_MT_POSITION_X,
|
|
0, tsdata->num_x * 64 - 1, 0, 0);
|
|
input_set_abs_params(input, ABS_MT_POSITION_Y,
|
|
0, tsdata->num_y * 64 - 1, 0, 0);
|
|
error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, 0);
|
|
if (error) {
|
|
dev_err(&client->dev, "Unable to init MT slots.\n");
|
|
goto err_free_mem;
|
|
}
|
|
|
|
input_set_drvdata(input, tsdata);
|
|
i2c_set_clientdata(client, tsdata);
|
|
|
|
error = request_threaded_irq(client->irq, NULL, edt_ft5x06_ts_isr,
|
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
|
client->name, tsdata);
|
|
if (error) {
|
|
dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
|
|
goto err_free_mem;
|
|
}
|
|
|
|
error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group);
|
|
if (error)
|
|
goto err_free_irq;
|
|
|
|
error = input_register_device(input);
|
|
if (error)
|
|
goto err_remove_attrs;
|
|
|
|
edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
|
|
device_init_wakeup(&client->dev, 1);
|
|
|
|
dev_dbg(&client->dev,
|
|
"EDT FT5x06 initialized: IRQ pin %d, Reset pin %d.\n",
|
|
pdata->irq_pin, pdata->reset_pin);
|
|
|
|
return 0;
|
|
|
|
err_remove_attrs:
|
|
sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
|
|
err_free_irq:
|
|
free_irq(client->irq, tsdata);
|
|
err_free_mem:
|
|
input_free_device(input);
|
|
kfree(tsdata);
|
|
|
|
if (gpio_is_valid(pdata->irq_pin))
|
|
gpio_free(pdata->irq_pin);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int edt_ft5x06_ts_remove(struct i2c_client *client)
|
|
{
|
|
const struct edt_ft5x06_platform_data *pdata =
|
|
dev_get_platdata(&client->dev);
|
|
struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
|
|
|
|
edt_ft5x06_ts_teardown_debugfs(tsdata);
|
|
sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
|
|
|
|
free_irq(client->irq, tsdata);
|
|
input_unregister_device(tsdata->input);
|
|
|
|
if (gpio_is_valid(pdata->irq_pin))
|
|
gpio_free(pdata->irq_pin);
|
|
if (gpio_is_valid(pdata->reset_pin))
|
|
gpio_free(pdata->reset_pin);
|
|
|
|
kfree(tsdata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int edt_ft5x06_ts_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
|
|
if (device_may_wakeup(dev))
|
|
enable_irq_wake(client->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int edt_ft5x06_ts_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
|
|
if (device_may_wakeup(dev))
|
|
disable_irq_wake(client->irq);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
|
|
edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
|
|
|
|
static const struct i2c_device_id edt_ft5x06_ts_id[] = {
|
|
{ "edt-ft5x06", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
|
|
|
|
static struct i2c_driver edt_ft5x06_ts_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "edt_ft5x06",
|
|
.pm = &edt_ft5x06_ts_pm_ops,
|
|
},
|
|
.id_table = edt_ft5x06_ts_id,
|
|
.probe = edt_ft5x06_ts_probe,
|
|
.remove = edt_ft5x06_ts_remove,
|
|
};
|
|
|
|
module_i2c_driver(edt_ft5x06_ts_driver);
|
|
|
|
MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
|
|
MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
|
|
MODULE_LICENSE("GPL");
|