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/smp_lock.h> 25acb45439SRussell King #include <linux/sched.h> 26acb45439SRussell King #include <linux/completion.h> 27acb45439SRussell King #include <linux/delay.h> 28acb45439SRussell King #include <linux/string.h> 29acb45439SRussell King #include <linux/input.h> 30acb45439SRussell King #include <linux/device.h> 31acb45439SRussell King #include <linux/suspend.h> 32acb45439SRussell King #include <linux/slab.h> 335437775eSPavel Machek #include <linux/kthread.h> 34acb45439SRussell King 35acb45439SRussell King #include <asm/dma.h> 36acb45439SRussell King #include <asm/semaphore.h> 3717532989SPavel Machek #include <asm/arch/collie.h> 3817532989SPavel Machek #include <asm/mach-types.h> 39acb45439SRussell King 40acb45439SRussell King #include "ucb1x00.h" 41acb45439SRussell King 42acb45439SRussell King 43acb45439SRussell King struct ucb1x00_ts { 44bd622663SDmitry Torokhov struct input_dev *idev; 45acb45439SRussell King struct ucb1x00 *ucb; 46acb45439SRussell King 47acb45439SRussell King wait_queue_head_t irq_wait; 48acb45439SRussell King struct task_struct *rtask; 49acb45439SRussell King u16 x_res; 50acb45439SRussell King u16 y_res; 51acb45439SRussell King 526b9ea421SRussell King unsigned int restart:1; 536b9ea421SRussell King unsigned int adcsync:1; 54acb45439SRussell King }; 55acb45439SRussell King 56acb45439SRussell King static int adcsync; 57acb45439SRussell King 58acb45439SRussell King static inline void ucb1x00_ts_evt_add(struct ucb1x00_ts *ts, u16 pressure, u16 x, u16 y) 59acb45439SRussell King { 601393c3edSNicolas Pitre struct input_dev *idev = ts->idev; 6108c67d2aSDmitry Torokhov 621393c3edSNicolas Pitre input_report_abs(idev, ABS_X, x); 631393c3edSNicolas Pitre input_report_abs(idev, ABS_Y, y); 641393c3edSNicolas Pitre input_report_abs(idev, ABS_PRESSURE, pressure); 651393c3edSNicolas Pitre input_sync(idev); 66acb45439SRussell King } 67acb45439SRussell King 68acb45439SRussell King static inline void ucb1x00_ts_event_release(struct ucb1x00_ts *ts) 69acb45439SRussell King { 701393c3edSNicolas Pitre struct input_dev *idev = ts->idev; 7108c67d2aSDmitry Torokhov 721393c3edSNicolas Pitre input_report_abs(idev, ABS_PRESSURE, 0); 731393c3edSNicolas Pitre input_sync(idev); 74acb45439SRussell King } 75acb45439SRussell King 76acb45439SRussell King /* 77acb45439SRussell King * Switch to interrupt mode. 78acb45439SRussell King */ 79acb45439SRussell King static inline void ucb1x00_ts_mode_int(struct ucb1x00_ts *ts) 80acb45439SRussell King { 81acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 82acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 83acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 84acb45439SRussell King UCB_TS_CR_MODE_INT); 85acb45439SRussell King } 86acb45439SRussell King 87acb45439SRussell King /* 88acb45439SRussell King * Switch to pressure mode, and read pressure. We don't need to wait 89acb45439SRussell King * here, since both plates are being driven. 90acb45439SRussell King */ 91acb45439SRussell King static inline unsigned int ucb1x00_ts_read_pressure(struct ucb1x00_ts *ts) 92acb45439SRussell King { 9317532989SPavel Machek if (machine_is_collie()) { 9417532989SPavel Machek ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0); 9517532989SPavel Machek ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 9617532989SPavel Machek UCB_TS_CR_TSPX_POW | UCB_TS_CR_TSMX_POW | 9717532989SPavel Machek UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 9817532989SPavel Machek 9917532989SPavel Machek udelay(55); 10017532989SPavel Machek 10117532989SPavel Machek return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_AD2, ts->adcsync); 10217532989SPavel Machek } else { 103acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 104acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 105acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 106acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 107acb45439SRussell King 108acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 109acb45439SRussell King } 11017532989SPavel Machek } 111acb45439SRussell King 112acb45439SRussell King /* 113acb45439SRussell King * Switch to X position mode and measure Y plate. We switch the plate 114acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 115acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 116acb45439SRussell King * for things to stabilise. 117acb45439SRussell King */ 118acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xpos(struct ucb1x00_ts *ts) 119acb45439SRussell King { 12017532989SPavel Machek if (machine_is_collie()) 12117532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 12217532989SPavel Machek else { 123acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 124acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 125acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 126acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 127acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 128acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 12917532989SPavel Machek } 130acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 131acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 132acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 133acb45439SRussell King 134acb45439SRussell King udelay(55); 135acb45439SRussell King 136acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 137acb45439SRussell King } 138acb45439SRussell King 139acb45439SRussell King /* 140acb45439SRussell King * Switch to Y position mode and measure X plate. We switch the plate 141acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 142acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 143acb45439SRussell King * for things to stabilise. 144acb45439SRussell King */ 145acb45439SRussell King static inline unsigned int ucb1x00_ts_read_ypos(struct ucb1x00_ts *ts) 146acb45439SRussell King { 14717532989SPavel Machek if (machine_is_collie()) 14817532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 14917532989SPavel Machek else { 150acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 151acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 152acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 153acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 154acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 155acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 15617532989SPavel Machek } 15717532989SPavel Machek 158acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 159acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 160acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 161acb45439SRussell King 162acb45439SRussell King udelay(55); 163acb45439SRussell King 164acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPX, ts->adcsync); 165acb45439SRussell King } 166acb45439SRussell King 167acb45439SRussell King /* 168acb45439SRussell King * Switch to X plate resistance mode. Set MX to ground, PX to 169acb45439SRussell King * supply. Measure current. 170acb45439SRussell King */ 171acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xres(struct ucb1x00_ts *ts) 172acb45439SRussell King { 173acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 174acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 175acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 176acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 177acb45439SRussell King } 178acb45439SRussell King 179acb45439SRussell King /* 180acb45439SRussell King * Switch to Y plate resistance mode. Set MY to ground, PY to 181acb45439SRussell King * supply. Measure current. 182acb45439SRussell King */ 183acb45439SRussell King static inline unsigned int ucb1x00_ts_read_yres(struct ucb1x00_ts *ts) 184acb45439SRussell King { 185acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 186acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 187acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 188acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 189acb45439SRussell King } 190acb45439SRussell King 19117532989SPavel Machek static inline int ucb1x00_ts_pen_down(struct ucb1x00_ts *ts) 19217532989SPavel Machek { 19317532989SPavel Machek unsigned int val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR); 19408c67d2aSDmitry Torokhov 19517532989SPavel Machek if (machine_is_collie()) 19617532989SPavel Machek return (!(val & (UCB_TS_CR_TSPX_LOW))); 19717532989SPavel Machek else 19817532989SPavel Machek return (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW)); 19917532989SPavel Machek } 20017532989SPavel Machek 201acb45439SRussell King /* 202acb45439SRussell King * This is a RT kernel thread that handles the ADC accesses 203acb45439SRussell King * (mainly so we can use semaphores in the UCB1200 core code 204acb45439SRussell King * to serialise accesses to the ADC). 205acb45439SRussell King */ 206acb45439SRussell King static int ucb1x00_thread(void *_ts) 207acb45439SRussell King { 208acb45439SRussell King struct ucb1x00_ts *ts = _ts; 209acb45439SRussell King struct task_struct *tsk = current; 210acb45439SRussell King DECLARE_WAITQUEUE(wait, tsk); 211acb45439SRussell King int valid; 212acb45439SRussell King 213acb45439SRussell King /* 214acb45439SRussell King * We could run as a real-time thread. However, thus far 215acb45439SRussell King * this doesn't seem to be necessary. 216acb45439SRussell King */ 217acb45439SRussell King // tsk->policy = SCHED_FIFO; 218acb45439SRussell King // tsk->rt_priority = 1; 219acb45439SRussell King 220acb45439SRussell King valid = 0; 221acb45439SRussell King 222acb45439SRussell King add_wait_queue(&ts->irq_wait, &wait); 2235437775eSPavel Machek while (!kthread_should_stop()) { 22417532989SPavel Machek unsigned int x, y, p; 225acb45439SRussell King signed long timeout; 226acb45439SRussell King 227acb45439SRussell King ts->restart = 0; 228acb45439SRussell King 229acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 230acb45439SRussell King 231acb45439SRussell King x = ucb1x00_ts_read_xpos(ts); 232acb45439SRussell King y = ucb1x00_ts_read_ypos(ts); 233acb45439SRussell King p = ucb1x00_ts_read_pressure(ts); 234acb45439SRussell King 235acb45439SRussell King /* 236acb45439SRussell King * Switch back to interrupt mode. 237acb45439SRussell King */ 238acb45439SRussell King ucb1x00_ts_mode_int(ts); 239acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 240acb45439SRussell King 2415437775eSPavel Machek msleep(10); 242acb45439SRussell King 243acb45439SRussell King ucb1x00_enable(ts->ucb); 244acb45439SRussell King 24517532989SPavel Machek 24617532989SPavel Machek if (ucb1x00_ts_pen_down(ts)) { 247acb45439SRussell King set_task_state(tsk, TASK_INTERRUPTIBLE); 248acb45439SRussell King 24917532989SPavel Machek ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, machine_is_collie() ? UCB_RISING : UCB_FALLING); 250acb45439SRussell King ucb1x00_disable(ts->ucb); 251acb45439SRussell King 252acb45439SRussell King /* 253acb45439SRussell King * If we spat out a valid sample set last time, 254acb45439SRussell King * spit out a "pen off" sample here. 255acb45439SRussell King */ 256acb45439SRussell King if (valid) { 257acb45439SRussell King ucb1x00_ts_event_release(ts); 258acb45439SRussell King valid = 0; 259acb45439SRussell King } 260acb45439SRussell King 261acb45439SRussell King timeout = MAX_SCHEDULE_TIMEOUT; 262acb45439SRussell King } else { 263acb45439SRussell King ucb1x00_disable(ts->ucb); 264acb45439SRussell King 265acb45439SRussell King /* 266acb45439SRussell King * Filtering is policy. Policy belongs in user 267acb45439SRussell King * space. We therefore leave it to user space 268acb45439SRussell King * to do any filtering they please. 269acb45439SRussell King */ 270acb45439SRussell King if (!ts->restart) { 271acb45439SRussell King ucb1x00_ts_evt_add(ts, p, x, y); 272acb45439SRussell King valid = 1; 273acb45439SRussell King } 274acb45439SRussell King 275acb45439SRussell King set_task_state(tsk, TASK_INTERRUPTIBLE); 276acb45439SRussell King timeout = HZ / 100; 277acb45439SRussell King } 278acb45439SRussell King 279acb45439SRussell King try_to_freeze(); 280acb45439SRussell King 281acb45439SRussell King schedule_timeout(timeout); 282acb45439SRussell King } 283acb45439SRussell King 284acb45439SRussell King remove_wait_queue(&ts->irq_wait, &wait); 285acb45439SRussell King 286acb45439SRussell King ts->rtask = NULL; 2875437775eSPavel Machek return 0; 288acb45439SRussell King } 289acb45439SRussell King 290acb45439SRussell King /* 291acb45439SRussell King * We only detect touch screen _touches_ with this interrupt 292acb45439SRussell King * handler, and even then we just schedule our task. 293acb45439SRussell King */ 294acb45439SRussell King static void ucb1x00_ts_irq(int idx, void *id) 295acb45439SRussell King { 296acb45439SRussell King struct ucb1x00_ts *ts = id; 29708c67d2aSDmitry Torokhov 298acb45439SRussell King ucb1x00_disable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING); 299acb45439SRussell King wake_up(&ts->irq_wait); 300acb45439SRussell King } 301acb45439SRussell King 302acb45439SRussell King static int ucb1x00_ts_open(struct input_dev *idev) 303acb45439SRussell King { 3041393c3edSNicolas Pitre struct ucb1x00_ts *ts = idev->private; 305acb45439SRussell King int ret = 0; 306acb45439SRussell King 3075437775eSPavel Machek BUG_ON(ts->rtask); 308acb45439SRussell King 309acb45439SRussell King init_waitqueue_head(&ts->irq_wait); 310acb45439SRussell King ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts); 311acb45439SRussell King if (ret < 0) 312acb45439SRussell King goto out; 313acb45439SRussell King 314acb45439SRussell King /* 315acb45439SRussell King * If we do this at all, we should allow the user to 316acb45439SRussell King * measure and read the X and Y resistance at any time. 317acb45439SRussell King */ 318acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 319acb45439SRussell King ts->x_res = ucb1x00_ts_read_xres(ts); 320acb45439SRussell King ts->y_res = ucb1x00_ts_read_yres(ts); 321acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 322acb45439SRussell King 3235437775eSPavel Machek ts->rtask = kthread_run(ucb1x00_thread, ts, "ktsd"); 3245437775eSPavel Machek if (!IS_ERR(ts->rtask)) { 325acb45439SRussell King ret = 0; 326acb45439SRussell King } else { 327acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 3285437775eSPavel Machek ts->rtask = NULL; 3295437775eSPavel Machek ret = -EFAULT; 330acb45439SRussell King } 331acb45439SRussell King 332acb45439SRussell King out: 333acb45439SRussell King return ret; 334acb45439SRussell King } 335acb45439SRussell King 336acb45439SRussell King /* 337acb45439SRussell King * Release touchscreen resources. Disable IRQs. 338acb45439SRussell King */ 339acb45439SRussell King static void ucb1x00_ts_close(struct input_dev *idev) 340acb45439SRussell King { 3411393c3edSNicolas Pitre struct ucb1x00_ts *ts = idev->private; 342acb45439SRussell King 3435437775eSPavel Machek if (ts->rtask) 3445437775eSPavel Machek kthread_stop(ts->rtask); 345acb45439SRussell King 346acb45439SRussell King ucb1x00_enable(ts->ucb); 347acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 348acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0); 349acb45439SRussell King ucb1x00_disable(ts->ucb); 350acb45439SRussell King } 351acb45439SRussell King 352acb45439SRussell King #ifdef CONFIG_PM 353acb45439SRussell King static int ucb1x00_ts_resume(struct ucb1x00_dev *dev) 354acb45439SRussell King { 355acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 356acb45439SRussell King 357acb45439SRussell King if (ts->rtask != NULL) { 358acb45439SRussell King /* 359acb45439SRussell King * Restart the TS thread to ensure the 360acb45439SRussell King * TS interrupt mode is set up again 361acb45439SRussell King * after sleep. 362acb45439SRussell King */ 363acb45439SRussell King ts->restart = 1; 364acb45439SRussell King wake_up(&ts->irq_wait); 365acb45439SRussell King } 366acb45439SRussell King return 0; 367acb45439SRussell King } 368acb45439SRussell King #else 369acb45439SRussell King #define ucb1x00_ts_resume NULL 370acb45439SRussell King #endif 371acb45439SRussell King 372acb45439SRussell King 373acb45439SRussell King /* 374acb45439SRussell King * Initialisation. 375acb45439SRussell King */ 376acb45439SRussell King static int ucb1x00_ts_add(struct ucb1x00_dev *dev) 377acb45439SRussell King { 378acb45439SRussell King struct ucb1x00_ts *ts; 37908c67d2aSDmitry Torokhov struct input_dev *idev; 38008c67d2aSDmitry Torokhov int err; 381acb45439SRussell King 382bd622663SDmitry Torokhov ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL); 38308c67d2aSDmitry Torokhov idev = input_allocate_device(); 38408c67d2aSDmitry Torokhov if (!ts || !idev) { 38508c67d2aSDmitry Torokhov err = -ENOMEM; 38608c67d2aSDmitry Torokhov goto fail; 387bd622663SDmitry Torokhov } 388acb45439SRussell King 389acb45439SRussell King ts->ucb = dev->ucb; 39008c67d2aSDmitry Torokhov ts->idev = idev; 391acb45439SRussell King ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC; 392acb45439SRussell King 39308c67d2aSDmitry Torokhov idev->private = ts; 39408c67d2aSDmitry Torokhov idev->name = "Touchscreen panel"; 39508c67d2aSDmitry Torokhov idev->id.product = ts->ucb->id; 39608c67d2aSDmitry Torokhov idev->open = ucb1x00_ts_open; 39708c67d2aSDmitry Torokhov idev->close = ucb1x00_ts_close; 398acb45439SRussell King 39908c67d2aSDmitry Torokhov __set_bit(EV_ABS, idev->evbit); 40008c67d2aSDmitry Torokhov __set_bit(ABS_X, idev->absbit); 40108c67d2aSDmitry Torokhov __set_bit(ABS_Y, idev->absbit); 40208c67d2aSDmitry Torokhov __set_bit(ABS_PRESSURE, idev->absbit); 403acb45439SRussell King 40408c67d2aSDmitry Torokhov err = input_register_device(idev); 40508c67d2aSDmitry Torokhov if (err) 40608c67d2aSDmitry Torokhov goto fail; 407acb45439SRussell King 408acb45439SRussell King dev->priv = ts; 409acb45439SRussell King 410acb45439SRussell King return 0; 41108c67d2aSDmitry Torokhov 41208c67d2aSDmitry Torokhov fail: 41308c67d2aSDmitry Torokhov input_free_device(idev); 41408c67d2aSDmitry Torokhov kfree(ts); 41508c67d2aSDmitry Torokhov return err; 416acb45439SRussell King } 417acb45439SRussell King 418acb45439SRussell King static void ucb1x00_ts_remove(struct ucb1x00_dev *dev) 419acb45439SRussell King { 420acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 421bd622663SDmitry Torokhov 422bd622663SDmitry Torokhov input_unregister_device(ts->idev); 423acb45439SRussell King kfree(ts); 424acb45439SRussell King } 425acb45439SRussell King 426acb45439SRussell King static struct ucb1x00_driver ucb1x00_ts_driver = { 427acb45439SRussell King .add = ucb1x00_ts_add, 428acb45439SRussell King .remove = ucb1x00_ts_remove, 429acb45439SRussell King .resume = ucb1x00_ts_resume, 430acb45439SRussell King }; 431acb45439SRussell King 432acb45439SRussell King static int __init ucb1x00_ts_init(void) 433acb45439SRussell King { 434acb45439SRussell King return ucb1x00_register_driver(&ucb1x00_ts_driver); 435acb45439SRussell King } 436acb45439SRussell King 437acb45439SRussell King static void __exit ucb1x00_ts_exit(void) 438acb45439SRussell King { 439acb45439SRussell King ucb1x00_unregister_driver(&ucb1x00_ts_driver); 440acb45439SRussell King } 441acb45439SRussell King 442acb45439SRussell King module_param(adcsync, int, 0444); 443acb45439SRussell King module_init(ucb1x00_ts_init); 444acb45439SRussell King module_exit(ucb1x00_ts_exit); 445acb45439SRussell King 446acb45439SRussell King MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); 447acb45439SRussell King MODULE_DESCRIPTION("UCB1x00 touchscreen driver"); 448acb45439SRussell King MODULE_LICENSE("GPL"); 449