150b6f1f4SKwangwoo Lee /* 250b6f1f4SKwangwoo Lee * drivers/input/touchscreen/tsc2007.c 350b6f1f4SKwangwoo Lee * 450b6f1f4SKwangwoo Lee * Copyright (c) 2008 MtekVision Co., Ltd. 550b6f1f4SKwangwoo Lee * Kwangwoo Lee <kwlee@mtekvision.com> 650b6f1f4SKwangwoo Lee * 750b6f1f4SKwangwoo Lee * Using code from: 850b6f1f4SKwangwoo Lee * - ads7846.c 950b6f1f4SKwangwoo Lee * Copyright (c) 2005 David Brownell 1050b6f1f4SKwangwoo Lee * Copyright (c) 2006 Nokia Corporation 1150b6f1f4SKwangwoo Lee * - corgi_ts.c 1250b6f1f4SKwangwoo Lee * Copyright (C) 2004-2005 Richard Purdie 1350b6f1f4SKwangwoo Lee * - omap_ts.[hc], ads7846.h, ts_osk.c 1450b6f1f4SKwangwoo Lee * Copyright (C) 2002 MontaVista Software 1550b6f1f4SKwangwoo Lee * Copyright (C) 2004 Texas Instruments 1650b6f1f4SKwangwoo Lee * Copyright (C) 2005 Dirk Behme 1750b6f1f4SKwangwoo Lee * 1850b6f1f4SKwangwoo Lee * This program is free software; you can redistribute it and/or modify 1950b6f1f4SKwangwoo Lee * it under the terms of the GNU General Public License version 2 as 2050b6f1f4SKwangwoo Lee * published by the Free Software Foundation. 2150b6f1f4SKwangwoo Lee */ 2250b6f1f4SKwangwoo Lee 2350b6f1f4SKwangwoo Lee #include <linux/module.h> 2450b6f1f4SKwangwoo Lee #include <linux/slab.h> 2550b6f1f4SKwangwoo Lee #include <linux/input.h> 2650b6f1f4SKwangwoo Lee #include <linux/interrupt.h> 2750b6f1f4SKwangwoo Lee #include <linux/i2c.h> 2807f9e5cfSDenis Carikli #include <linux/of_device.h> 2907f9e5cfSDenis Carikli #include <linux/of_gpio.h> 30*8fd70815SWolfram Sang #include <linux/platform_data/tsc2007.h> 31f1443404SH. Nikolaus Schaller #include "tsc2007.h" 3250b6f1f4SKwangwoo Lee 33f1443404SH. Nikolaus Schaller int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd) 3450b6f1f4SKwangwoo Lee { 3550b6f1f4SKwangwoo Lee s32 data; 3650b6f1f4SKwangwoo Lee u16 val; 3750b6f1f4SKwangwoo Lee 3850b6f1f4SKwangwoo Lee data = i2c_smbus_read_word_data(tsc->client, cmd); 3950b6f1f4SKwangwoo Lee if (data < 0) { 4050b6f1f4SKwangwoo Lee dev_err(&tsc->client->dev, "i2c io error: %d\n", data); 4150b6f1f4SKwangwoo Lee return data; 4250b6f1f4SKwangwoo Lee } 4350b6f1f4SKwangwoo Lee 4450b6f1f4SKwangwoo Lee /* The protocol and raw data format from i2c interface: 4550b6f1f4SKwangwoo Lee * S Addr Wr [A] Comm [A] S Addr Rd [A] [DataLow] A [DataHigh] NA P 4650b6f1f4SKwangwoo Lee * Where DataLow has [D11-D4], DataHigh has [D3-D0 << 4 | Dummy 4bit]. 4750b6f1f4SKwangwoo Lee */ 4850b6f1f4SKwangwoo Lee val = swab16(data) >> 4; 4950b6f1f4SKwangwoo Lee 5050b6f1f4SKwangwoo Lee dev_dbg(&tsc->client->dev, "data: 0x%x, val: 0x%x\n", data, val); 5150b6f1f4SKwangwoo Lee 5250b6f1f4SKwangwoo Lee return val; 5350b6f1f4SKwangwoo Lee } 5450b6f1f4SKwangwoo Lee 55d570e9efSDmitry Torokhov static void tsc2007_read_values(struct tsc2007 *tsc, struct ts_event *tc) 5650b6f1f4SKwangwoo Lee { 57d570e9efSDmitry Torokhov /* y- still on; turn on only y+ (and ADC) */ 58d570e9efSDmitry Torokhov tc->y = tsc2007_xfer(tsc, READ_Y); 5950b6f1f4SKwangwoo Lee 60d570e9efSDmitry Torokhov /* turn y- off, x+ on, then leave in lowpower */ 61d570e9efSDmitry Torokhov tc->x = tsc2007_xfer(tsc, READ_X); 62d570e9efSDmitry Torokhov 63d570e9efSDmitry Torokhov /* turn y+ off, x- on; we'll use formula #1 */ 64d570e9efSDmitry Torokhov tc->z1 = tsc2007_xfer(tsc, READ_Z1); 65d570e9efSDmitry Torokhov tc->z2 = tsc2007_xfer(tsc, READ_Z2); 66d570e9efSDmitry Torokhov 67d570e9efSDmitry Torokhov /* Prepare for next touch reading - power down ADC, enable PENIRQ */ 68d570e9efSDmitry Torokhov tsc2007_xfer(tsc, PWRDOWN); 69d570e9efSDmitry Torokhov } 70d570e9efSDmitry Torokhov 71deec586dSH. Nikolaus Schaller u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc) 72d570e9efSDmitry Torokhov { 73d570e9efSDmitry Torokhov u32 rt = 0; 7450b6f1f4SKwangwoo Lee 7550b6f1f4SKwangwoo Lee /* range filtering */ 76d570e9efSDmitry Torokhov if (tc->x == MAX_12BIT) 77d570e9efSDmitry Torokhov tc->x = 0; 7850b6f1f4SKwangwoo Lee 79d570e9efSDmitry Torokhov if (likely(tc->x && tc->z1)) { 80deec586dSH. Nikolaus Schaller /* compute touch resistance using equation #1 */ 81d570e9efSDmitry Torokhov rt = tc->z2 - tc->z1; 82d570e9efSDmitry Torokhov rt *= tc->x; 83d570e9efSDmitry Torokhov rt *= tsc->x_plate_ohms; 84d570e9efSDmitry Torokhov rt /= tc->z1; 8550b6f1f4SKwangwoo Lee rt = (rt + 2047) >> 12; 8650b6f1f4SKwangwoo Lee } 8750b6f1f4SKwangwoo Lee 88d570e9efSDmitry Torokhov return rt; 89d570e9efSDmitry Torokhov } 90d570e9efSDmitry Torokhov 91f1443404SH. Nikolaus Schaller bool tsc2007_is_pen_down(struct tsc2007 *ts) 92d570e9efSDmitry Torokhov { 93141586bcSDmitry Torokhov /* 94141586bcSDmitry Torokhov * NOTE: We can't rely on the pressure to determine the pen down 95d570e9efSDmitry Torokhov * state, even though this controller has a pressure sensor. 96d570e9efSDmitry Torokhov * The pressure value can fluctuate for quite a while after 97d570e9efSDmitry Torokhov * lifting the pen and in some cases may not even settle at the 98d570e9efSDmitry Torokhov * expected value. 9950b6f1f4SKwangwoo Lee * 10050b6f1f4SKwangwoo Lee * The only safe way to check for the pen up condition is in the 101d570e9efSDmitry Torokhov * work function by reading the pen signal state (it's a GPIO 102d570e9efSDmitry Torokhov * and IRQ). Unfortunately such callback is not always available, 103377dc553SDmitry Torokhov * in that case we assume that the pen is down and expect caller 104377dc553SDmitry Torokhov * to fall back on the pressure reading. 10550b6f1f4SKwangwoo Lee */ 106377dc553SDmitry Torokhov 107377dc553SDmitry Torokhov if (!ts->get_pendown_state) 108377dc553SDmitry Torokhov return true; 109377dc553SDmitry Torokhov 11007f9e5cfSDenis Carikli return ts->get_pendown_state(&ts->client->dev); 111d570e9efSDmitry Torokhov } 112d570e9efSDmitry Torokhov 113377dc553SDmitry Torokhov static irqreturn_t tsc2007_soft_irq(int irq, void *handle) 114377dc553SDmitry Torokhov { 115377dc553SDmitry Torokhov struct tsc2007 *ts = handle; 116377dc553SDmitry Torokhov struct input_dev *input = ts->input; 117377dc553SDmitry Torokhov struct ts_event tc; 118377dc553SDmitry Torokhov u32 rt; 119d570e9efSDmitry Torokhov 120377dc553SDmitry Torokhov while (!ts->stopped && tsc2007_is_pen_down(ts)) { 121377dc553SDmitry Torokhov 122377dc553SDmitry Torokhov /* pen is down, continue with the measurement */ 123f1443404SH. Nikolaus Schaller 124f1443404SH. Nikolaus Schaller mutex_lock(&ts->mlock); 125d570e9efSDmitry Torokhov tsc2007_read_values(ts, &tc); 126f1443404SH. Nikolaus Schaller mutex_unlock(&ts->mlock); 127d570e9efSDmitry Torokhov 128deec586dSH. Nikolaus Schaller rt = tsc2007_calculate_resistance(ts, &tc); 129d570e9efSDmitry Torokhov 13007f9e5cfSDenis Carikli if (!rt && !ts->get_pendown_state) { 131377dc553SDmitry Torokhov /* 132377dc553SDmitry Torokhov * If pressure reported is 0 and we don't have 133377dc553SDmitry Torokhov * callback to check pendown state, we have to 134377dc553SDmitry Torokhov * assume that pen was lifted up. 135377dc553SDmitry Torokhov */ 136377dc553SDmitry Torokhov break; 137d570e9efSDmitry Torokhov } 138d570e9efSDmitry Torokhov 139377dc553SDmitry Torokhov if (rt <= ts->max_rt) { 140377dc553SDmitry Torokhov dev_dbg(&ts->client->dev, 141deec586dSH. Nikolaus Schaller "DOWN point(%4d,%4d), resistance (%4u)\n", 142377dc553SDmitry Torokhov tc.x, tc.y, rt); 14350b6f1f4SKwangwoo Lee 144db4572ffSH. Nikolaus Schaller rt = ts->max_rt - rt; 145db4572ffSH. Nikolaus Schaller 14650b6f1f4SKwangwoo Lee input_report_key(input, BTN_TOUCH, 1); 147d570e9efSDmitry Torokhov input_report_abs(input, ABS_X, tc.x); 148d570e9efSDmitry Torokhov input_report_abs(input, ABS_Y, tc.y); 14950b6f1f4SKwangwoo Lee input_report_abs(input, ABS_PRESSURE, rt); 15050b6f1f4SKwangwoo Lee 15150b6f1f4SKwangwoo Lee input_sync(input); 15250b6f1f4SKwangwoo Lee 153377dc553SDmitry Torokhov } else { 154d570e9efSDmitry Torokhov /* 155377dc553SDmitry Torokhov * Sample found inconsistent by debouncing or pressure is 156377dc553SDmitry Torokhov * beyond the maximum. Don't report it to user space, 157377dc553SDmitry Torokhov * repeat at least once more the measurement. 158d570e9efSDmitry Torokhov */ 159377dc553SDmitry Torokhov dev_dbg(&ts->client->dev, "ignored pressure %d\n", rt); 160d570e9efSDmitry Torokhov } 16150b6f1f4SKwangwoo Lee 162bbdb38a2SAaron Sierra wait_event_timeout(ts->wait, ts->stopped, ts->poll_period); 16350b6f1f4SKwangwoo Lee } 16450b6f1f4SKwangwoo Lee 165377dc553SDmitry Torokhov dev_dbg(&ts->client->dev, "UP\n"); 166377dc553SDmitry Torokhov 167377dc553SDmitry Torokhov input_report_key(input, BTN_TOUCH, 0); 168377dc553SDmitry Torokhov input_report_abs(input, ABS_PRESSURE, 0); 169377dc553SDmitry Torokhov input_sync(input); 170377dc553SDmitry Torokhov 171377dc553SDmitry Torokhov if (ts->clear_penirq) 172377dc553SDmitry Torokhov ts->clear_penirq(); 173377dc553SDmitry Torokhov 174377dc553SDmitry Torokhov return IRQ_HANDLED; 175377dc553SDmitry Torokhov } 176377dc553SDmitry Torokhov 177377dc553SDmitry Torokhov static irqreturn_t tsc2007_hard_irq(int irq, void *handle) 17850b6f1f4SKwangwoo Lee { 17950b6f1f4SKwangwoo Lee struct tsc2007 *ts = handle; 18050b6f1f4SKwangwoo Lee 18107f9e5cfSDenis Carikli if (tsc2007_is_pen_down(ts)) 182377dc553SDmitry Torokhov return IRQ_WAKE_THREAD; 18350b6f1f4SKwangwoo Lee 18450b6f1f4SKwangwoo Lee if (ts->clear_penirq) 18550b6f1f4SKwangwoo Lee ts->clear_penirq(); 18650b6f1f4SKwangwoo Lee 18750b6f1f4SKwangwoo Lee return IRQ_HANDLED; 18850b6f1f4SKwangwoo Lee } 18950b6f1f4SKwangwoo Lee 190d3654d7eSDmitry Torokhov static void tsc2007_stop(struct tsc2007 *ts) 191141586bcSDmitry Torokhov { 192377dc553SDmitry Torokhov ts->stopped = true; 193377dc553SDmitry Torokhov mb(); 194377dc553SDmitry Torokhov wake_up(&ts->wait); 195d3654d7eSDmitry Torokhov 196d3654d7eSDmitry Torokhov disable_irq(ts->irq); 197d3654d7eSDmitry Torokhov } 198d3654d7eSDmitry Torokhov 199d3654d7eSDmitry Torokhov static int tsc2007_open(struct input_dev *input_dev) 200d3654d7eSDmitry Torokhov { 201d3654d7eSDmitry Torokhov struct tsc2007 *ts = input_get_drvdata(input_dev); 202d3654d7eSDmitry Torokhov int err; 203d3654d7eSDmitry Torokhov 204d3654d7eSDmitry Torokhov ts->stopped = false; 205d3654d7eSDmitry Torokhov mb(); 206d3654d7eSDmitry Torokhov 207d3654d7eSDmitry Torokhov enable_irq(ts->irq); 208d3654d7eSDmitry Torokhov 209d3654d7eSDmitry Torokhov /* Prepare for touch readings - power down ADC and enable PENIRQ */ 210d3654d7eSDmitry Torokhov err = tsc2007_xfer(ts, PWRDOWN); 211d3654d7eSDmitry Torokhov if (err < 0) { 212d3654d7eSDmitry Torokhov tsc2007_stop(ts); 213d3654d7eSDmitry Torokhov return err; 214d3654d7eSDmitry Torokhov } 215d3654d7eSDmitry Torokhov 216d3654d7eSDmitry Torokhov return 0; 217d3654d7eSDmitry Torokhov } 218d3654d7eSDmitry Torokhov 219d3654d7eSDmitry Torokhov static void tsc2007_close(struct input_dev *input_dev) 220d3654d7eSDmitry Torokhov { 221d3654d7eSDmitry Torokhov struct tsc2007 *ts = input_get_drvdata(input_dev); 222d3654d7eSDmitry Torokhov 223d3654d7eSDmitry Torokhov tsc2007_stop(ts); 224141586bcSDmitry Torokhov } 225141586bcSDmitry Torokhov 22607f9e5cfSDenis Carikli #ifdef CONFIG_OF 22707f9e5cfSDenis Carikli static int tsc2007_get_pendown_state_gpio(struct device *dev) 22850b6f1f4SKwangwoo Lee { 22907f9e5cfSDenis Carikli struct i2c_client *client = to_i2c_client(dev); 23007f9e5cfSDenis Carikli struct tsc2007 *ts = i2c_get_clientdata(client); 23150b6f1f4SKwangwoo Lee 23207f9e5cfSDenis Carikli return !gpio_get_value(ts->gpio); 23307f9e5cfSDenis Carikli } 23407f9e5cfSDenis Carikli 23507f9e5cfSDenis Carikli static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts) 23607f9e5cfSDenis Carikli { 23707f9e5cfSDenis Carikli struct device_node *np = client->dev.of_node; 23807f9e5cfSDenis Carikli u32 val32; 23907f9e5cfSDenis Carikli u64 val64; 24007f9e5cfSDenis Carikli 24107f9e5cfSDenis Carikli if (!np) { 24207f9e5cfSDenis Carikli dev_err(&client->dev, "missing device tree data\n"); 24350b6f1f4SKwangwoo Lee return -EINVAL; 24450b6f1f4SKwangwoo Lee } 24550b6f1f4SKwangwoo Lee 24607f9e5cfSDenis Carikli if (!of_property_read_u32(np, "ti,max-rt", &val32)) 24707f9e5cfSDenis Carikli ts->max_rt = val32; 24807f9e5cfSDenis Carikli else 24907f9e5cfSDenis Carikli ts->max_rt = MAX_12BIT; 25050b6f1f4SKwangwoo Lee 25107f9e5cfSDenis Carikli if (!of_property_read_u32(np, "ti,fuzzx", &val32)) 25207f9e5cfSDenis Carikli ts->fuzzx = val32; 25307f9e5cfSDenis Carikli 25407f9e5cfSDenis Carikli if (!of_property_read_u32(np, "ti,fuzzy", &val32)) 25507f9e5cfSDenis Carikli ts->fuzzy = val32; 25607f9e5cfSDenis Carikli 25707f9e5cfSDenis Carikli if (!of_property_read_u32(np, "ti,fuzzz", &val32)) 25807f9e5cfSDenis Carikli ts->fuzzz = val32; 25907f9e5cfSDenis Carikli 26007f9e5cfSDenis Carikli if (!of_property_read_u64(np, "ti,poll-period", &val64)) 261bbdb38a2SAaron Sierra ts->poll_period = msecs_to_jiffies(val64); 26207f9e5cfSDenis Carikli else 263bbdb38a2SAaron Sierra ts->poll_period = msecs_to_jiffies(1); 26407f9e5cfSDenis Carikli 26507f9e5cfSDenis Carikli if (!of_property_read_u32(np, "ti,x-plate-ohms", &val32)) { 26607f9e5cfSDenis Carikli ts->x_plate_ohms = val32; 26707f9e5cfSDenis Carikli } else { 26807f9e5cfSDenis Carikli dev_err(&client->dev, "missing ti,x-plate-ohms devicetree property."); 26907f9e5cfSDenis Carikli return -EINVAL; 27050b6f1f4SKwangwoo Lee } 27150b6f1f4SKwangwoo Lee 27207f9e5cfSDenis Carikli ts->gpio = of_get_gpio(np, 0); 27307f9e5cfSDenis Carikli if (gpio_is_valid(ts->gpio)) 27407f9e5cfSDenis Carikli ts->get_pendown_state = tsc2007_get_pendown_state_gpio; 27507f9e5cfSDenis Carikli else 27607f9e5cfSDenis Carikli dev_warn(&client->dev, 27707f9e5cfSDenis Carikli "GPIO not specified in DT (of_get_gpio returned %d)\n", 27807f9e5cfSDenis Carikli ts->gpio); 27950b6f1f4SKwangwoo Lee 28007f9e5cfSDenis Carikli return 0; 28107f9e5cfSDenis Carikli } 28207f9e5cfSDenis Carikli #else 28307f9e5cfSDenis Carikli static int tsc2007_probe_dt(struct i2c_client *client, struct tsc2007 *ts) 28407f9e5cfSDenis Carikli { 28507f9e5cfSDenis Carikli dev_err(&client->dev, "platform data is required!\n"); 28607f9e5cfSDenis Carikli return -EINVAL; 28707f9e5cfSDenis Carikli } 28807f9e5cfSDenis Carikli #endif 28907f9e5cfSDenis Carikli 29007f9e5cfSDenis Carikli static int tsc2007_probe_pdev(struct i2c_client *client, struct tsc2007 *ts, 29107f9e5cfSDenis Carikli const struct tsc2007_platform_data *pdata, 29207f9e5cfSDenis Carikli const struct i2c_device_id *id) 29307f9e5cfSDenis Carikli { 29450b6f1f4SKwangwoo Lee ts->model = pdata->model; 29550b6f1f4SKwangwoo Lee ts->x_plate_ohms = pdata->x_plate_ohms; 29684005eb5SThierry Reding ts->max_rt = pdata->max_rt ? : MAX_12BIT; 297bbdb38a2SAaron Sierra ts->poll_period = msecs_to_jiffies(pdata->poll_period ? : 1); 29850b6f1f4SKwangwoo Lee ts->get_pendown_state = pdata->get_pendown_state; 29950b6f1f4SKwangwoo Lee ts->clear_penirq = pdata->clear_penirq; 30007f9e5cfSDenis Carikli ts->fuzzx = pdata->fuzzx; 30107f9e5cfSDenis Carikli ts->fuzzy = pdata->fuzzy; 30207f9e5cfSDenis Carikli ts->fuzzz = pdata->fuzzz; 30350b6f1f4SKwangwoo Lee 304341deefeSPhilip Rakity if (pdata->x_plate_ohms == 0) { 305341deefeSPhilip Rakity dev_err(&client->dev, "x_plate_ohms is not set up in platform data"); 30607f9e5cfSDenis Carikli return -EINVAL; 307341deefeSPhilip Rakity } 308341deefeSPhilip Rakity 30907f9e5cfSDenis Carikli return 0; 31007f9e5cfSDenis Carikli } 31107f9e5cfSDenis Carikli 312fd91a5f0SDmitry Torokhov static void tsc2007_call_exit_platform_hw(void *data) 313fd91a5f0SDmitry Torokhov { 314fd91a5f0SDmitry Torokhov struct device *dev = data; 315fd91a5f0SDmitry Torokhov const struct tsc2007_platform_data *pdata = dev_get_platdata(dev); 316fd91a5f0SDmitry Torokhov 317fd91a5f0SDmitry Torokhov pdata->exit_platform_hw(); 318fd91a5f0SDmitry Torokhov } 319fd91a5f0SDmitry Torokhov 32007f9e5cfSDenis Carikli static int tsc2007_probe(struct i2c_client *client, 32107f9e5cfSDenis Carikli const struct i2c_device_id *id) 32207f9e5cfSDenis Carikli { 323f1443404SH. Nikolaus Schaller const struct tsc2007_platform_data *pdata = 324f1443404SH. Nikolaus Schaller dev_get_platdata(&client->dev); 32507f9e5cfSDenis Carikli struct tsc2007 *ts; 32607f9e5cfSDenis Carikli struct input_dev *input_dev; 32707f9e5cfSDenis Carikli int err; 32807f9e5cfSDenis Carikli 32907f9e5cfSDenis Carikli if (!i2c_check_functionality(client->adapter, 33007f9e5cfSDenis Carikli I2C_FUNC_SMBUS_READ_WORD_DATA)) 33107f9e5cfSDenis Carikli return -EIO; 33207f9e5cfSDenis Carikli 33307f9e5cfSDenis Carikli ts = devm_kzalloc(&client->dev, sizeof(struct tsc2007), GFP_KERNEL); 33407f9e5cfSDenis Carikli if (!ts) 33507f9e5cfSDenis Carikli return -ENOMEM; 33607f9e5cfSDenis Carikli 33707f9e5cfSDenis Carikli if (pdata) 33807f9e5cfSDenis Carikli err = tsc2007_probe_pdev(client, ts, pdata, id); 33907f9e5cfSDenis Carikli else 34007f9e5cfSDenis Carikli err = tsc2007_probe_dt(client, ts); 34107f9e5cfSDenis Carikli if (err) 34207f9e5cfSDenis Carikli return err; 34307f9e5cfSDenis Carikli 344fd91a5f0SDmitry Torokhov input_dev = devm_input_allocate_device(&client->dev); 345fd91a5f0SDmitry Torokhov if (!input_dev) 346fd91a5f0SDmitry Torokhov return -ENOMEM; 34707f9e5cfSDenis Carikli 34807f9e5cfSDenis Carikli i2c_set_clientdata(client, ts); 34907f9e5cfSDenis Carikli 35007f9e5cfSDenis Carikli ts->client = client; 35107f9e5cfSDenis Carikli ts->irq = client->irq; 35207f9e5cfSDenis Carikli ts->input = input_dev; 353f1443404SH. Nikolaus Schaller 35407f9e5cfSDenis Carikli init_waitqueue_head(&ts->wait); 355f1443404SH. Nikolaus Schaller mutex_init(&ts->mlock); 35607f9e5cfSDenis Carikli 3574e8718a1SKay Sievers snprintf(ts->phys, sizeof(ts->phys), 3584e8718a1SKay Sievers "%s/input0", dev_name(&client->dev)); 35950b6f1f4SKwangwoo Lee 36050b6f1f4SKwangwoo Lee input_dev->name = "TSC2007 Touchscreen"; 36150b6f1f4SKwangwoo Lee input_dev->phys = ts->phys; 36250b6f1f4SKwangwoo Lee input_dev->id.bustype = BUS_I2C; 36350b6f1f4SKwangwoo Lee 364d3654d7eSDmitry Torokhov input_dev->open = tsc2007_open; 365d3654d7eSDmitry Torokhov input_dev->close = tsc2007_close; 366d3654d7eSDmitry Torokhov 367d3654d7eSDmitry Torokhov input_set_drvdata(input_dev, ts); 368d3654d7eSDmitry Torokhov 369c61ebe83SDmitry Torokhov input_set_capability(input_dev, EV_KEY, BTN_TOUCH); 37050b6f1f4SKwangwoo Lee 37107f9e5cfSDenis Carikli input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, ts->fuzzx, 0); 37207f9e5cfSDenis Carikli input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, ts->fuzzy, 0); 373891e376bSThierry Reding input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_12BIT, 37407f9e5cfSDenis Carikli ts->fuzzz, 0); 37550b6f1f4SKwangwoo Lee 376fd91a5f0SDmitry Torokhov if (pdata) { 377fd91a5f0SDmitry Torokhov if (pdata->exit_platform_hw) { 378fd91a5f0SDmitry Torokhov err = devm_add_action(&client->dev, 379fd91a5f0SDmitry Torokhov tsc2007_call_exit_platform_hw, 380fd91a5f0SDmitry Torokhov &client->dev); 381fd91a5f0SDmitry Torokhov if (err) { 382fd91a5f0SDmitry Torokhov dev_err(&client->dev, 383fd91a5f0SDmitry Torokhov "Failed to register exit_platform_hw action, %d\n", 384fd91a5f0SDmitry Torokhov err); 385fd91a5f0SDmitry Torokhov return err; 386fd91a5f0SDmitry Torokhov } 387fd91a5f0SDmitry Torokhov } 38875fba3b0SRichard Röjfors 389fd91a5f0SDmitry Torokhov if (pdata->init_platform_hw) 390fd91a5f0SDmitry Torokhov pdata->init_platform_hw(); 391fd91a5f0SDmitry Torokhov } 392fd91a5f0SDmitry Torokhov 393fd91a5f0SDmitry Torokhov err = devm_request_threaded_irq(&client->dev, ts->irq, 394fd91a5f0SDmitry Torokhov tsc2007_hard_irq, tsc2007_soft_irq, 395fd91a5f0SDmitry Torokhov IRQF_ONESHOT, 396fd91a5f0SDmitry Torokhov client->dev.driver->name, ts); 397fd91a5f0SDmitry Torokhov if (err) { 398fd91a5f0SDmitry Torokhov dev_err(&client->dev, "Failed to request irq %d: %d\n", 399fd91a5f0SDmitry Torokhov ts->irq, err); 400fd91a5f0SDmitry Torokhov return err; 40150b6f1f4SKwangwoo Lee } 40250b6f1f4SKwangwoo Lee 403d3654d7eSDmitry Torokhov tsc2007_stop(ts); 404cf5f439bSRichard Röjfors 405934df231SH. Nikolaus Schaller /* power down the chip (TSC2007_SETUP does not ACK on I2C) */ 406934df231SH. Nikolaus Schaller err = tsc2007_xfer(ts, PWRDOWN); 407934df231SH. Nikolaus Schaller if (err < 0) { 408934df231SH. Nikolaus Schaller dev_err(&client->dev, 409934df231SH. Nikolaus Schaller "Failed to setup chip: %d\n", err); 410f1443404SH. Nikolaus Schaller return err; /* chip does not respond */ 411934df231SH. Nikolaus Schaller } 412934df231SH. Nikolaus Schaller 41350b6f1f4SKwangwoo Lee err = input_register_device(input_dev); 414fd91a5f0SDmitry Torokhov if (err) { 415fd91a5f0SDmitry Torokhov dev_err(&client->dev, 416fd91a5f0SDmitry Torokhov "Failed to register input device: %d\n", err); 41750b6f1f4SKwangwoo Lee return err; 41850b6f1f4SKwangwoo Lee } 41950b6f1f4SKwangwoo Lee 420f1443404SH. Nikolaus Schaller err = tsc2007_iio_configure(ts); 421f1443404SH. Nikolaus Schaller if (err) { 422f1443404SH. Nikolaus Schaller dev_err(&client->dev, 423f1443404SH. Nikolaus Schaller "Failed to register with IIO: %d\n", err); 424f1443404SH. Nikolaus Schaller return err; 425f1443404SH. Nikolaus Schaller } 426f1443404SH. Nikolaus Schaller 42750b6f1f4SKwangwoo Lee return 0; 42850b6f1f4SKwangwoo Lee } 42950b6f1f4SKwangwoo Lee 430ce7b39a1SMárton Németh static const struct i2c_device_id tsc2007_idtable[] = { 43150b6f1f4SKwangwoo Lee { "tsc2007", 0 }, 43250b6f1f4SKwangwoo Lee { } 43350b6f1f4SKwangwoo Lee }; 43450b6f1f4SKwangwoo Lee 43550b6f1f4SKwangwoo Lee MODULE_DEVICE_TABLE(i2c, tsc2007_idtable); 43650b6f1f4SKwangwoo Lee 43707f9e5cfSDenis Carikli #ifdef CONFIG_OF 43807f9e5cfSDenis Carikli static const struct of_device_id tsc2007_of_match[] = { 43907f9e5cfSDenis Carikli { .compatible = "ti,tsc2007" }, 44007f9e5cfSDenis Carikli { /* sentinel */ } 44107f9e5cfSDenis Carikli }; 44207f9e5cfSDenis Carikli MODULE_DEVICE_TABLE(of, tsc2007_of_match); 44307f9e5cfSDenis Carikli #endif 44407f9e5cfSDenis Carikli 44550b6f1f4SKwangwoo Lee static struct i2c_driver tsc2007_driver = { 44650b6f1f4SKwangwoo Lee .driver = { 44707f9e5cfSDenis Carikli .name = "tsc2007", 44807f9e5cfSDenis Carikli .of_match_table = of_match_ptr(tsc2007_of_match), 44950b6f1f4SKwangwoo Lee }, 45050b6f1f4SKwangwoo Lee .id_table = tsc2007_idtable, 45150b6f1f4SKwangwoo Lee .probe = tsc2007_probe, 45250b6f1f4SKwangwoo Lee }; 45350b6f1f4SKwangwoo Lee 4541b92c1cfSAxel Lin module_i2c_driver(tsc2007_driver); 45550b6f1f4SKwangwoo Lee 45650b6f1f4SKwangwoo Lee MODULE_AUTHOR("Kwangwoo Lee <kwlee@mtekvision.com>"); 45750b6f1f4SKwangwoo Lee MODULE_DESCRIPTION("TSC2007 TouchScreen Driver"); 45850b6f1f4SKwangwoo Lee MODULE_LICENSE("GPL"); 459