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 adcsync:1; 51acb45439SRussell King }; 52acb45439SRussell King 53acb45439SRussell King static int adcsync; 54acb45439SRussell King 55acb45439SRussell King static inline void ucb1x00_ts_evt_add(struct ucb1x00_ts *ts, u16 pressure, u16 x, u16 y) 56acb45439SRussell King { 571393c3edSNicolas Pitre struct input_dev *idev = ts->idev; 5808c67d2aSDmitry Torokhov 591393c3edSNicolas Pitre input_report_abs(idev, ABS_X, x); 601393c3edSNicolas Pitre input_report_abs(idev, ABS_Y, y); 611393c3edSNicolas Pitre input_report_abs(idev, ABS_PRESSURE, pressure); 62de8c8b06SJochen Friedrich input_report_key(idev, BTN_TOUCH, 1); 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); 71de8c8b06SJochen Friedrich input_report_key(idev, BTN_TOUCH, 0); 721393c3edSNicolas Pitre input_sync(idev); 73acb45439SRussell King } 74acb45439SRussell King 75acb45439SRussell King /* 76acb45439SRussell King * Switch to interrupt mode. 77acb45439SRussell King */ 78acb45439SRussell King static inline void ucb1x00_ts_mode_int(struct ucb1x00_ts *ts) 79acb45439SRussell King { 80acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 81acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 82acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 83acb45439SRussell King UCB_TS_CR_MODE_INT); 84acb45439SRussell King } 85acb45439SRussell King 86acb45439SRussell King /* 87acb45439SRussell King * Switch to pressure mode, and read pressure. We don't need to wait 88acb45439SRussell King * here, since both plates are being driven. 89acb45439SRussell King */ 90acb45439SRussell King static inline unsigned int ucb1x00_ts_read_pressure(struct ucb1x00_ts *ts) 91acb45439SRussell King { 9217532989SPavel Machek if (machine_is_collie()) { 9317532989SPavel Machek ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0); 9417532989SPavel Machek ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 9517532989SPavel Machek UCB_TS_CR_TSPX_POW | UCB_TS_CR_TSMX_POW | 9617532989SPavel Machek UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 9717532989SPavel Machek 9817532989SPavel Machek udelay(55); 9917532989SPavel Machek 10017532989SPavel Machek return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_AD2, ts->adcsync); 10117532989SPavel Machek } else { 102acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 103acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 104acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 105acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 106acb45439SRussell King 107acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 108acb45439SRussell King } 10917532989SPavel Machek } 110acb45439SRussell King 111acb45439SRussell King /* 112acb45439SRussell King * Switch to X position mode and measure Y plate. We switch the plate 113acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 114acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 115acb45439SRussell King * for things to stabilise. 116acb45439SRussell King */ 117acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xpos(struct ucb1x00_ts *ts) 118acb45439SRussell King { 11917532989SPavel Machek if (machine_is_collie()) 12017532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 12117532989SPavel Machek else { 122acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 123acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 124acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 125acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 126acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 127acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 12817532989SPavel Machek } 129acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 130acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 131acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 132acb45439SRussell King 133acb45439SRussell King udelay(55); 134acb45439SRussell King 135acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 136acb45439SRussell King } 137acb45439SRussell King 138acb45439SRussell King /* 139acb45439SRussell King * Switch to Y position mode and measure X plate. We switch the plate 140acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 141acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 142acb45439SRussell King * for things to stabilise. 143acb45439SRussell King */ 144acb45439SRussell King static inline unsigned int ucb1x00_ts_read_ypos(struct ucb1x00_ts *ts) 145acb45439SRussell King { 14617532989SPavel Machek if (machine_is_collie()) 14717532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 14817532989SPavel Machek else { 149acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 150acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 151acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 152acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 153acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 154acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 15517532989SPavel Machek } 15617532989SPavel Machek 157acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 158acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 159acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 160acb45439SRussell King 161acb45439SRussell King udelay(55); 162acb45439SRussell King 163acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPX, ts->adcsync); 164acb45439SRussell King } 165acb45439SRussell King 166acb45439SRussell King /* 167acb45439SRussell King * Switch to X plate resistance mode. Set MX to ground, PX to 168acb45439SRussell King * supply. Measure current. 169acb45439SRussell King */ 170acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xres(struct ucb1x00_ts *ts) 171acb45439SRussell King { 172acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 173acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 174acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 175acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 176acb45439SRussell King } 177acb45439SRussell King 178acb45439SRussell King /* 179acb45439SRussell King * Switch to Y plate resistance mode. Set MY to ground, PY to 180acb45439SRussell King * supply. Measure current. 181acb45439SRussell King */ 182acb45439SRussell King static inline unsigned int ucb1x00_ts_read_yres(struct ucb1x00_ts *ts) 183acb45439SRussell King { 184acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 185acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 186acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 187acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 188acb45439SRussell King } 189acb45439SRussell King 19017532989SPavel Machek static inline int ucb1x00_ts_pen_down(struct ucb1x00_ts *ts) 19117532989SPavel Machek { 19217532989SPavel Machek unsigned int val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR); 19308c67d2aSDmitry Torokhov 19417532989SPavel Machek if (machine_is_collie()) 19517532989SPavel Machek return (!(val & (UCB_TS_CR_TSPX_LOW))); 19617532989SPavel Machek else 19717532989SPavel Machek return (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW)); 19817532989SPavel Machek } 19917532989SPavel Machek 200acb45439SRussell King /* 201acb45439SRussell King * This is a RT kernel thread that handles the ADC accesses 202acb45439SRussell King * (mainly so we can use semaphores in the UCB1200 core code 203acb45439SRussell King * to serialise accesses to the ADC). 204acb45439SRussell King */ 205acb45439SRussell King static int ucb1x00_thread(void *_ts) 206acb45439SRussell King { 207acb45439SRussell King struct ucb1x00_ts *ts = _ts; 208f7440b0eSRobert P. J. Day DECLARE_WAITQUEUE(wait, current); 2090af5e4c3SRussell King bool frozen, ignore = false; 2101124d5caSDmitry Torokhov int valid = 0; 211acb45439SRussell King 21283144186SRafael J. Wysocki set_freezable(); 213acb45439SRussell King add_wait_queue(&ts->irq_wait, &wait); 2140af5e4c3SRussell King while (!kthread_freezable_should_stop(&frozen)) { 21517532989SPavel Machek unsigned int x, y, p; 216acb45439SRussell King signed long timeout; 217acb45439SRussell King 2180af5e4c3SRussell King if (frozen) 2190af5e4c3SRussell King ignore = true; 220acb45439SRussell King 221acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 222acb45439SRussell King 223acb45439SRussell King x = ucb1x00_ts_read_xpos(ts); 224acb45439SRussell King y = ucb1x00_ts_read_ypos(ts); 225acb45439SRussell King p = ucb1x00_ts_read_pressure(ts); 226acb45439SRussell King 227acb45439SRussell King /* 228acb45439SRussell King * Switch back to interrupt mode. 229acb45439SRussell King */ 230acb45439SRussell King ucb1x00_ts_mode_int(ts); 231acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 232acb45439SRussell King 2335437775eSPavel Machek msleep(10); 234acb45439SRussell King 235acb45439SRussell King ucb1x00_enable(ts->ucb); 236acb45439SRussell King 23717532989SPavel Machek 23817532989SPavel Machek if (ucb1x00_ts_pen_down(ts)) { 239f7440b0eSRobert P. J. Day set_current_state(TASK_INTERRUPTIBLE); 240acb45439SRussell King 24117532989SPavel Machek ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, machine_is_collie() ? UCB_RISING : UCB_FALLING); 242acb45439SRussell King ucb1x00_disable(ts->ucb); 243acb45439SRussell King 244acb45439SRussell King /* 245acb45439SRussell King * If we spat out a valid sample set last time, 246acb45439SRussell King * spit out a "pen off" sample here. 247acb45439SRussell King */ 248acb45439SRussell King if (valid) { 249acb45439SRussell King ucb1x00_ts_event_release(ts); 250acb45439SRussell King valid = 0; 251acb45439SRussell King } 252acb45439SRussell King 253acb45439SRussell King timeout = MAX_SCHEDULE_TIMEOUT; 254acb45439SRussell King } else { 255acb45439SRussell King ucb1x00_disable(ts->ucb); 256acb45439SRussell King 257acb45439SRussell King /* 258acb45439SRussell King * Filtering is policy. Policy belongs in user 259acb45439SRussell King * space. We therefore leave it to user space 260acb45439SRussell King * to do any filtering they please. 261acb45439SRussell King */ 2620af5e4c3SRussell King if (!ignore) { 263acb45439SRussell King ucb1x00_ts_evt_add(ts, p, x, y); 264acb45439SRussell King valid = 1; 265acb45439SRussell King } 266acb45439SRussell King 267f7440b0eSRobert P. J. Day set_current_state(TASK_INTERRUPTIBLE); 268acb45439SRussell King timeout = HZ / 100; 269acb45439SRussell King } 270acb45439SRussell King 271acb45439SRussell King schedule_timeout(timeout); 272acb45439SRussell King } 273acb45439SRussell King 274acb45439SRussell King remove_wait_queue(&ts->irq_wait, &wait); 275acb45439SRussell King 276acb45439SRussell King ts->rtask = NULL; 2775437775eSPavel Machek return 0; 278acb45439SRussell King } 279acb45439SRussell King 280acb45439SRussell King /* 281acb45439SRussell King * We only detect touch screen _touches_ with this interrupt 282acb45439SRussell King * handler, and even then we just schedule our task. 283acb45439SRussell King */ 284acb45439SRussell King static void ucb1x00_ts_irq(int idx, void *id) 285acb45439SRussell King { 286acb45439SRussell King struct ucb1x00_ts *ts = id; 28708c67d2aSDmitry Torokhov 288acb45439SRussell King ucb1x00_disable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING); 289acb45439SRussell King wake_up(&ts->irq_wait); 290acb45439SRussell King } 291acb45439SRussell King 292acb45439SRussell King static int ucb1x00_ts_open(struct input_dev *idev) 293acb45439SRussell King { 29426be5a50SDmitry Torokhov struct ucb1x00_ts *ts = input_get_drvdata(idev); 295acb45439SRussell King int ret = 0; 296acb45439SRussell King 2975437775eSPavel Machek BUG_ON(ts->rtask); 298acb45439SRussell King 299acb45439SRussell King init_waitqueue_head(&ts->irq_wait); 300acb45439SRussell King ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts); 301acb45439SRussell King if (ret < 0) 302acb45439SRussell King goto out; 303acb45439SRussell King 304acb45439SRussell King /* 305acb45439SRussell King * If we do this at all, we should allow the user to 306acb45439SRussell King * measure and read the X and Y resistance at any time. 307acb45439SRussell King */ 308acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 309acb45439SRussell King ts->x_res = ucb1x00_ts_read_xres(ts); 310acb45439SRussell King ts->y_res = ucb1x00_ts_read_yres(ts); 311acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 312acb45439SRussell King 3135437775eSPavel Machek ts->rtask = kthread_run(ucb1x00_thread, ts, "ktsd"); 3145437775eSPavel Machek if (!IS_ERR(ts->rtask)) { 315acb45439SRussell King ret = 0; 316acb45439SRussell King } else { 317acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 3185437775eSPavel Machek ts->rtask = NULL; 3195437775eSPavel Machek ret = -EFAULT; 320acb45439SRussell King } 321acb45439SRussell King 322acb45439SRussell King out: 323acb45439SRussell King return ret; 324acb45439SRussell King } 325acb45439SRussell King 326acb45439SRussell King /* 327acb45439SRussell King * Release touchscreen resources. Disable IRQs. 328acb45439SRussell King */ 329acb45439SRussell King static void ucb1x00_ts_close(struct input_dev *idev) 330acb45439SRussell King { 33126be5a50SDmitry Torokhov struct ucb1x00_ts *ts = input_get_drvdata(idev); 332acb45439SRussell King 3335437775eSPavel Machek if (ts->rtask) 3345437775eSPavel Machek kthread_stop(ts->rtask); 335acb45439SRussell King 336acb45439SRussell King ucb1x00_enable(ts->ucb); 337acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 338acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0); 339acb45439SRussell King ucb1x00_disable(ts->ucb); 340acb45439SRussell King } 341acb45439SRussell King 342acb45439SRussell King 343acb45439SRussell King /* 344acb45439SRussell King * Initialisation. 345acb45439SRussell King */ 346acb45439SRussell King static int ucb1x00_ts_add(struct ucb1x00_dev *dev) 347acb45439SRussell King { 348acb45439SRussell King struct ucb1x00_ts *ts; 34908c67d2aSDmitry Torokhov struct input_dev *idev; 35008c67d2aSDmitry Torokhov int err; 351acb45439SRussell King 352bd622663SDmitry Torokhov ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL); 35308c67d2aSDmitry Torokhov idev = input_allocate_device(); 35408c67d2aSDmitry Torokhov if (!ts || !idev) { 35508c67d2aSDmitry Torokhov err = -ENOMEM; 35608c67d2aSDmitry Torokhov goto fail; 357bd622663SDmitry Torokhov } 358acb45439SRussell King 359acb45439SRussell King ts->ucb = dev->ucb; 36008c67d2aSDmitry Torokhov ts->idev = idev; 361acb45439SRussell King ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC; 362acb45439SRussell King 36308c67d2aSDmitry Torokhov idev->name = "Touchscreen panel"; 36465f2e753SRussell King idev->id.product = ts->ucb->id; 36508c67d2aSDmitry Torokhov idev->open = ucb1x00_ts_open; 36608c67d2aSDmitry Torokhov idev->close = ucb1x00_ts_close; 367acb45439SRussell King 368de8c8b06SJochen Friedrich idev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY); 369de8c8b06SJochen Friedrich idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 370acb45439SRussell King 37126be5a50SDmitry Torokhov input_set_drvdata(idev, ts); 37226be5a50SDmitry Torokhov 3739063f1f1SJochen Friedrich ucb1x00_adc_enable(ts->ucb); 3749063f1f1SJochen Friedrich ts->x_res = ucb1x00_ts_read_xres(ts); 3759063f1f1SJochen Friedrich ts->y_res = ucb1x00_ts_read_yres(ts); 3769063f1f1SJochen Friedrich ucb1x00_adc_disable(ts->ucb); 3779063f1f1SJochen Friedrich 3789063f1f1SJochen Friedrich input_set_abs_params(idev, ABS_X, 0, ts->x_res, 0, 0); 3799063f1f1SJochen Friedrich input_set_abs_params(idev, ABS_Y, 0, ts->y_res, 0, 0); 3809063f1f1SJochen Friedrich input_set_abs_params(idev, ABS_PRESSURE, 0, 0, 0, 0); 3819063f1f1SJochen Friedrich 38208c67d2aSDmitry Torokhov err = input_register_device(idev); 38308c67d2aSDmitry Torokhov if (err) 38408c67d2aSDmitry Torokhov goto fail; 385acb45439SRussell King 386acb45439SRussell King dev->priv = ts; 387acb45439SRussell King 388acb45439SRussell King return 0; 38908c67d2aSDmitry Torokhov 39008c67d2aSDmitry Torokhov fail: 39108c67d2aSDmitry Torokhov input_free_device(idev); 39208c67d2aSDmitry Torokhov kfree(ts); 39308c67d2aSDmitry Torokhov return err; 394acb45439SRussell King } 395acb45439SRussell King 396acb45439SRussell King static void ucb1x00_ts_remove(struct ucb1x00_dev *dev) 397acb45439SRussell King { 398acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 399bd622663SDmitry Torokhov 400bd622663SDmitry Torokhov input_unregister_device(ts->idev); 401acb45439SRussell King kfree(ts); 402acb45439SRussell King } 403acb45439SRussell King 404acb45439SRussell King static struct ucb1x00_driver ucb1x00_ts_driver = { 405acb45439SRussell King .add = ucb1x00_ts_add, 406acb45439SRussell King .remove = ucb1x00_ts_remove, 407acb45439SRussell King }; 408acb45439SRussell King 409acb45439SRussell King static int __init ucb1x00_ts_init(void) 410acb45439SRussell King { 411acb45439SRussell King return ucb1x00_register_driver(&ucb1x00_ts_driver); 412acb45439SRussell King } 413acb45439SRussell King 414acb45439SRussell King static void __exit ucb1x00_ts_exit(void) 415acb45439SRussell King { 416acb45439SRussell King ucb1x00_unregister_driver(&ucb1x00_ts_driver); 417acb45439SRussell King } 418acb45439SRussell King 419acb45439SRussell King module_param(adcsync, int, 0444); 420acb45439SRussell King module_init(ucb1x00_ts_init); 421acb45439SRussell King module_exit(ucb1x00_ts_exit); 422acb45439SRussell King 423acb45439SRussell King MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); 424acb45439SRussell King MODULE_DESCRIPTION("UCB1x00 touchscreen driver"); 425acb45439SRussell King MODULE_LICENSE("GPL"); 426