1acb45439SRussell King /* 25437775eSPavel Machek * Touchscreen driver for UCB1x00-based touchscreens 3acb45439SRussell King * 4acb45439SRussell King * Copyright (C) 2001 Russell King, All Rights Reserved. 55437775eSPavel Machek * Copyright (C) 2005 Pavel Machek 6acb45439SRussell King * 7acb45439SRussell King * This program is free software; you can redistribute it and/or modify 8acb45439SRussell King * it under the terms of the GNU General Public License version 2 as 9acb45439SRussell King * published by the Free Software Foundation. 10acb45439SRussell King * 11acb45439SRussell King * 21-Jan-2002 <jco@ict.es> : 12acb45439SRussell King * 13acb45439SRussell King * Added support for synchronous A/D mode. This mode is useful to 14acb45439SRussell King * avoid noise induced in the touchpanel by the LCD, provided that 15acb45439SRussell King * the UCB1x00 has a valid LCD sync signal routed to its ADCSYNC pin. 16acb45439SRussell King * It is important to note that the signal connected to the ADCSYNC 17acb45439SRussell King * pin should provide pulses even when the LCD is blanked, otherwise 18acb45439SRussell King * a pen touch needed to unblank the LCD will never be read. 19acb45439SRussell King */ 20acb45439SRussell King #include <linux/module.h> 21acb45439SRussell King #include <linux/moduleparam.h> 22acb45439SRussell King #include <linux/init.h> 23acb45439SRussell King #include <linux/smp.h> 24acb45439SRussell King #include <linux/sched.h> 25acb45439SRussell King #include <linux/completion.h> 26acb45439SRussell King #include <linux/delay.h> 27acb45439SRussell King #include <linux/string.h> 28acb45439SRussell King #include <linux/input.h> 29acb45439SRussell King #include <linux/device.h> 307dfb7103SNigel Cunningham #include <linux/freezer.h> 31acb45439SRussell King #include <linux/slab.h> 325437775eSPavel Machek #include <linux/kthread.h> 33c8602edfSThomas Kunze #include <linux/mfd/ucb1x00.h> 34acb45439SRussell King 35dcea83adSRussell King #include <mach/dma.h> 36a09e64fbSRussell King #include <mach/collie.h> 3717532989SPavel Machek #include <asm/mach-types.h> 38acb45439SRussell King 39acb45439SRussell King 40acb45439SRussell King 41acb45439SRussell King struct ucb1x00_ts { 42bd622663SDmitry Torokhov struct input_dev *idev; 43acb45439SRussell King struct ucb1x00 *ucb; 44acb45439SRussell King 45acb45439SRussell King wait_queue_head_t irq_wait; 46acb45439SRussell King struct task_struct *rtask; 47acb45439SRussell King u16 x_res; 48acb45439SRussell King u16 y_res; 49acb45439SRussell King 506b9ea421SRussell King unsigned int restart:1; 516b9ea421SRussell King unsigned int adcsync:1; 52acb45439SRussell King }; 53acb45439SRussell King 54acb45439SRussell King static int adcsync; 55acb45439SRussell King 56acb45439SRussell King static inline void ucb1x00_ts_evt_add(struct ucb1x00_ts *ts, u16 pressure, u16 x, u16 y) 57acb45439SRussell King { 581393c3edSNicolas Pitre struct input_dev *idev = ts->idev; 5908c67d2aSDmitry Torokhov 601393c3edSNicolas Pitre input_report_abs(idev, ABS_X, x); 611393c3edSNicolas Pitre input_report_abs(idev, ABS_Y, y); 621393c3edSNicolas Pitre input_report_abs(idev, ABS_PRESSURE, pressure); 631393c3edSNicolas Pitre input_sync(idev); 64acb45439SRussell King } 65acb45439SRussell King 66acb45439SRussell King static inline void ucb1x00_ts_event_release(struct ucb1x00_ts *ts) 67acb45439SRussell King { 681393c3edSNicolas Pitre struct input_dev *idev = ts->idev; 6908c67d2aSDmitry Torokhov 701393c3edSNicolas Pitre input_report_abs(idev, ABS_PRESSURE, 0); 711393c3edSNicolas Pitre input_sync(idev); 72acb45439SRussell King } 73acb45439SRussell King 74acb45439SRussell King /* 75acb45439SRussell King * Switch to interrupt mode. 76acb45439SRussell King */ 77acb45439SRussell King static inline void ucb1x00_ts_mode_int(struct ucb1x00_ts *ts) 78acb45439SRussell King { 79acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 80acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 81acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 82acb45439SRussell King UCB_TS_CR_MODE_INT); 83acb45439SRussell King } 84acb45439SRussell King 85acb45439SRussell King /* 86acb45439SRussell King * Switch to pressure mode, and read pressure. We don't need to wait 87acb45439SRussell King * here, since both plates are being driven. 88acb45439SRussell King */ 89acb45439SRussell King static inline unsigned int ucb1x00_ts_read_pressure(struct ucb1x00_ts *ts) 90acb45439SRussell King { 9117532989SPavel Machek if (machine_is_collie()) { 9217532989SPavel Machek ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0); 9317532989SPavel Machek ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 9417532989SPavel Machek UCB_TS_CR_TSPX_POW | UCB_TS_CR_TSMX_POW | 9517532989SPavel Machek UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 9617532989SPavel Machek 9717532989SPavel Machek udelay(55); 9817532989SPavel Machek 9917532989SPavel Machek return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_AD2, ts->adcsync); 10017532989SPavel Machek } else { 101acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 102acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 103acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 104acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 105acb45439SRussell King 106acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 107acb45439SRussell King } 10817532989SPavel Machek } 109acb45439SRussell King 110acb45439SRussell King /* 111acb45439SRussell King * Switch to X position mode and measure Y plate. We switch the plate 112acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 113acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 114acb45439SRussell King * for things to stabilise. 115acb45439SRussell King */ 116acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xpos(struct ucb1x00_ts *ts) 117acb45439SRussell King { 11817532989SPavel Machek if (machine_is_collie()) 11917532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 12017532989SPavel Machek else { 121acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 122acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 123acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 124acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 125acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 126acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 12717532989SPavel Machek } 128acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 129acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 130acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 131acb45439SRussell King 132acb45439SRussell King udelay(55); 133acb45439SRussell King 134acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 135acb45439SRussell King } 136acb45439SRussell King 137acb45439SRussell King /* 138acb45439SRussell King * Switch to Y position mode and measure X plate. We switch the plate 139acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 140acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 141acb45439SRussell King * for things to stabilise. 142acb45439SRussell King */ 143acb45439SRussell King static inline unsigned int ucb1x00_ts_read_ypos(struct ucb1x00_ts *ts) 144acb45439SRussell King { 14517532989SPavel Machek if (machine_is_collie()) 14617532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 14717532989SPavel Machek else { 148acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 149acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 150acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 151acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 152acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 153acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 15417532989SPavel Machek } 15517532989SPavel Machek 156acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 157acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 158acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 159acb45439SRussell King 160acb45439SRussell King udelay(55); 161acb45439SRussell King 162acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPX, ts->adcsync); 163acb45439SRussell King } 164acb45439SRussell King 165acb45439SRussell King /* 166acb45439SRussell King * Switch to X plate resistance mode. Set MX to ground, PX to 167acb45439SRussell King * supply. Measure current. 168acb45439SRussell King */ 169acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xres(struct ucb1x00_ts *ts) 170acb45439SRussell King { 171acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 172acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 173acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 174acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 175acb45439SRussell King } 176acb45439SRussell King 177acb45439SRussell King /* 178acb45439SRussell King * Switch to Y plate resistance mode. Set MY to ground, PY to 179acb45439SRussell King * supply. Measure current. 180acb45439SRussell King */ 181acb45439SRussell King static inline unsigned int ucb1x00_ts_read_yres(struct ucb1x00_ts *ts) 182acb45439SRussell King { 183acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 184acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 185acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 186acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 187acb45439SRussell King } 188acb45439SRussell King 18917532989SPavel Machek static inline int ucb1x00_ts_pen_down(struct ucb1x00_ts *ts) 19017532989SPavel Machek { 19117532989SPavel Machek unsigned int val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR); 19208c67d2aSDmitry Torokhov 19317532989SPavel Machek if (machine_is_collie()) 19417532989SPavel Machek return (!(val & (UCB_TS_CR_TSPX_LOW))); 19517532989SPavel Machek else 19617532989SPavel Machek return (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW)); 19717532989SPavel Machek } 19817532989SPavel Machek 199acb45439SRussell King /* 200acb45439SRussell King * This is a RT kernel thread that handles the ADC accesses 201acb45439SRussell King * (mainly so we can use semaphores in the UCB1200 core code 202acb45439SRussell King * to serialise accesses to the ADC). 203acb45439SRussell King */ 204acb45439SRussell King static int ucb1x00_thread(void *_ts) 205acb45439SRussell King { 206acb45439SRussell King struct ucb1x00_ts *ts = _ts; 207f7440b0eSRobert P. J. Day DECLARE_WAITQUEUE(wait, current); 2081124d5caSDmitry Torokhov int valid = 0; 209acb45439SRussell King 21083144186SRafael J. Wysocki set_freezable(); 211acb45439SRussell King add_wait_queue(&ts->irq_wait, &wait); 2125437775eSPavel Machek while (!kthread_should_stop()) { 21317532989SPavel Machek unsigned int x, y, p; 214acb45439SRussell King signed long timeout; 215acb45439SRussell King 216acb45439SRussell King ts->restart = 0; 217acb45439SRussell King 218acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 219acb45439SRussell King 220acb45439SRussell King x = ucb1x00_ts_read_xpos(ts); 221acb45439SRussell King y = ucb1x00_ts_read_ypos(ts); 222acb45439SRussell King p = ucb1x00_ts_read_pressure(ts); 223acb45439SRussell King 224acb45439SRussell King /* 225acb45439SRussell King * Switch back to interrupt mode. 226acb45439SRussell King */ 227acb45439SRussell King ucb1x00_ts_mode_int(ts); 228acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 229acb45439SRussell King 2305437775eSPavel Machek msleep(10); 231acb45439SRussell King 232acb45439SRussell King ucb1x00_enable(ts->ucb); 233acb45439SRussell King 23417532989SPavel Machek 23517532989SPavel Machek if (ucb1x00_ts_pen_down(ts)) { 236f7440b0eSRobert P. J. Day set_current_state(TASK_INTERRUPTIBLE); 237acb45439SRussell King 23817532989SPavel Machek ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, machine_is_collie() ? UCB_RISING : UCB_FALLING); 239acb45439SRussell King ucb1x00_disable(ts->ucb); 240acb45439SRussell King 241acb45439SRussell King /* 242acb45439SRussell King * If we spat out a valid sample set last time, 243acb45439SRussell King * spit out a "pen off" sample here. 244acb45439SRussell King */ 245acb45439SRussell King if (valid) { 246acb45439SRussell King ucb1x00_ts_event_release(ts); 247acb45439SRussell King valid = 0; 248acb45439SRussell King } 249acb45439SRussell King 250acb45439SRussell King timeout = MAX_SCHEDULE_TIMEOUT; 251acb45439SRussell King } else { 252acb45439SRussell King ucb1x00_disable(ts->ucb); 253acb45439SRussell King 254acb45439SRussell King /* 255acb45439SRussell King * Filtering is policy. Policy belongs in user 256acb45439SRussell King * space. We therefore leave it to user space 257acb45439SRussell King * to do any filtering they please. 258acb45439SRussell King */ 259acb45439SRussell King if (!ts->restart) { 260acb45439SRussell King ucb1x00_ts_evt_add(ts, p, x, y); 261acb45439SRussell King valid = 1; 262acb45439SRussell King } 263acb45439SRussell King 264f7440b0eSRobert P. J. Day set_current_state(TASK_INTERRUPTIBLE); 265acb45439SRussell King timeout = HZ / 100; 266acb45439SRussell King } 267acb45439SRussell King 268acb45439SRussell King try_to_freeze(); 269acb45439SRussell King 270acb45439SRussell King schedule_timeout(timeout); 271acb45439SRussell King } 272acb45439SRussell King 273acb45439SRussell King remove_wait_queue(&ts->irq_wait, &wait); 274acb45439SRussell King 275acb45439SRussell King ts->rtask = NULL; 2765437775eSPavel Machek return 0; 277acb45439SRussell King } 278acb45439SRussell King 279acb45439SRussell King /* 280acb45439SRussell King * We only detect touch screen _touches_ with this interrupt 281acb45439SRussell King * handler, and even then we just schedule our task. 282acb45439SRussell King */ 283acb45439SRussell King static void ucb1x00_ts_irq(int idx, void *id) 284acb45439SRussell King { 285acb45439SRussell King struct ucb1x00_ts *ts = id; 28608c67d2aSDmitry Torokhov 287acb45439SRussell King ucb1x00_disable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING); 288acb45439SRussell King wake_up(&ts->irq_wait); 289acb45439SRussell King } 290acb45439SRussell King 291acb45439SRussell King static int ucb1x00_ts_open(struct input_dev *idev) 292acb45439SRussell King { 29326be5a50SDmitry Torokhov struct ucb1x00_ts *ts = input_get_drvdata(idev); 294acb45439SRussell King int ret = 0; 295acb45439SRussell King 2965437775eSPavel Machek BUG_ON(ts->rtask); 297acb45439SRussell King 298acb45439SRussell King init_waitqueue_head(&ts->irq_wait); 299acb45439SRussell King ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts); 300acb45439SRussell King if (ret < 0) 301acb45439SRussell King goto out; 302acb45439SRussell King 303acb45439SRussell King /* 304acb45439SRussell King * If we do this at all, we should allow the user to 305acb45439SRussell King * measure and read the X and Y resistance at any time. 306acb45439SRussell King */ 307acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 308acb45439SRussell King ts->x_res = ucb1x00_ts_read_xres(ts); 309acb45439SRussell King ts->y_res = ucb1x00_ts_read_yres(ts); 310acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 311acb45439SRussell King 3125437775eSPavel Machek ts->rtask = kthread_run(ucb1x00_thread, ts, "ktsd"); 3135437775eSPavel Machek if (!IS_ERR(ts->rtask)) { 314acb45439SRussell King ret = 0; 315acb45439SRussell King } else { 316acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 3175437775eSPavel Machek ts->rtask = NULL; 3185437775eSPavel Machek ret = -EFAULT; 319acb45439SRussell King } 320acb45439SRussell King 321acb45439SRussell King out: 322acb45439SRussell King return ret; 323acb45439SRussell King } 324acb45439SRussell King 325acb45439SRussell King /* 326acb45439SRussell King * Release touchscreen resources. Disable IRQs. 327acb45439SRussell King */ 328acb45439SRussell King static void ucb1x00_ts_close(struct input_dev *idev) 329acb45439SRussell King { 33026be5a50SDmitry Torokhov struct ucb1x00_ts *ts = input_get_drvdata(idev); 331acb45439SRussell King 3325437775eSPavel Machek if (ts->rtask) 3335437775eSPavel Machek kthread_stop(ts->rtask); 334acb45439SRussell King 335acb45439SRussell King ucb1x00_enable(ts->ucb); 336acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 337acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0); 338acb45439SRussell King ucb1x00_disable(ts->ucb); 339acb45439SRussell King } 340acb45439SRussell King 341acb45439SRussell King #ifdef CONFIG_PM 342acb45439SRussell King static int ucb1x00_ts_resume(struct ucb1x00_dev *dev) 343acb45439SRussell King { 344acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 345acb45439SRussell King 346acb45439SRussell King if (ts->rtask != NULL) { 347acb45439SRussell King /* 348acb45439SRussell King * Restart the TS thread to ensure the 349acb45439SRussell King * TS interrupt mode is set up again 350acb45439SRussell King * after sleep. 351acb45439SRussell King */ 352acb45439SRussell King ts->restart = 1; 353acb45439SRussell King wake_up(&ts->irq_wait); 354acb45439SRussell King } 355acb45439SRussell King return 0; 356acb45439SRussell King } 357acb45439SRussell King #else 358acb45439SRussell King #define ucb1x00_ts_resume NULL 359acb45439SRussell King #endif 360acb45439SRussell King 361acb45439SRussell King 362acb45439SRussell King /* 363acb45439SRussell King * Initialisation. 364acb45439SRussell King */ 365acb45439SRussell King static int ucb1x00_ts_add(struct ucb1x00_dev *dev) 366acb45439SRussell King { 367acb45439SRussell King struct ucb1x00_ts *ts; 36808c67d2aSDmitry Torokhov struct input_dev *idev; 36908c67d2aSDmitry Torokhov int err; 370acb45439SRussell King 371bd622663SDmitry Torokhov ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL); 37208c67d2aSDmitry Torokhov idev = input_allocate_device(); 37308c67d2aSDmitry Torokhov if (!ts || !idev) { 37408c67d2aSDmitry Torokhov err = -ENOMEM; 37508c67d2aSDmitry Torokhov goto fail; 376bd622663SDmitry Torokhov } 377acb45439SRussell King 378acb45439SRussell King ts->ucb = dev->ucb; 37908c67d2aSDmitry Torokhov ts->idev = idev; 380acb45439SRussell King ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC; 381acb45439SRussell King 38208c67d2aSDmitry Torokhov idev->name = "Touchscreen panel"; 38308c67d2aSDmitry Torokhov idev->id.product = ts->ucb->id; 38408c67d2aSDmitry Torokhov idev->open = ucb1x00_ts_open; 38508c67d2aSDmitry Torokhov idev->close = ucb1x00_ts_close; 386acb45439SRussell King 38708c67d2aSDmitry Torokhov __set_bit(EV_ABS, idev->evbit); 38808c67d2aSDmitry Torokhov __set_bit(ABS_X, idev->absbit); 38908c67d2aSDmitry Torokhov __set_bit(ABS_Y, idev->absbit); 39008c67d2aSDmitry Torokhov __set_bit(ABS_PRESSURE, idev->absbit); 391acb45439SRussell King 39226be5a50SDmitry Torokhov input_set_drvdata(idev, ts); 39326be5a50SDmitry Torokhov 39408c67d2aSDmitry Torokhov err = input_register_device(idev); 39508c67d2aSDmitry Torokhov if (err) 39608c67d2aSDmitry Torokhov goto fail; 397acb45439SRussell King 398acb45439SRussell King dev->priv = ts; 399acb45439SRussell King 400acb45439SRussell King return 0; 40108c67d2aSDmitry Torokhov 40208c67d2aSDmitry Torokhov fail: 40308c67d2aSDmitry Torokhov input_free_device(idev); 40408c67d2aSDmitry Torokhov kfree(ts); 40508c67d2aSDmitry Torokhov return err; 406acb45439SRussell King } 407acb45439SRussell King 408acb45439SRussell King static void ucb1x00_ts_remove(struct ucb1x00_dev *dev) 409acb45439SRussell King { 410acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 411bd622663SDmitry Torokhov 412bd622663SDmitry Torokhov input_unregister_device(ts->idev); 413acb45439SRussell King kfree(ts); 414acb45439SRussell King } 415acb45439SRussell King 416acb45439SRussell King static struct ucb1x00_driver ucb1x00_ts_driver = { 417acb45439SRussell King .add = ucb1x00_ts_add, 418acb45439SRussell King .remove = ucb1x00_ts_remove, 419acb45439SRussell King .resume = ucb1x00_ts_resume, 420acb45439SRussell King }; 421acb45439SRussell King 422acb45439SRussell King static int __init ucb1x00_ts_init(void) 423acb45439SRussell King { 424acb45439SRussell King return ucb1x00_register_driver(&ucb1x00_ts_driver); 425acb45439SRussell King } 426acb45439SRussell King 427acb45439SRussell King static void __exit ucb1x00_ts_exit(void) 428acb45439SRussell King { 429acb45439SRussell King ucb1x00_unregister_driver(&ucb1x00_ts_driver); 430acb45439SRussell King } 431acb45439SRussell King 432acb45439SRussell King module_param(adcsync, int, 0444); 433acb45439SRussell King module_init(ucb1x00_ts_init); 434acb45439SRussell King module_exit(ucb1x00_ts_exit); 435acb45439SRussell King 436acb45439SRussell King MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); 437acb45439SRussell King MODULE_DESCRIPTION("UCB1x00 touchscreen driver"); 438acb45439SRussell King MODULE_LICENSE("GPL"); 439