1febf1dffSMark Brown /* 2febf1dffSMark Brown * wm97xx-core.c -- Touch screen driver core for Wolfson WM9705, WM9712 3febf1dffSMark Brown * and WM9713 AC97 Codecs. 4febf1dffSMark Brown * 5febf1dffSMark Brown * Copyright 2003, 2004, 2005, 2006, 2007, 2008 Wolfson Microelectronics PLC. 6b8d055a8SLiam Girdwood * Author: Liam Girdwood <lrg@slimlogic.co.uk> 7febf1dffSMark Brown * Parts Copyright : Ian Molton <spyro@f2s.com> 8febf1dffSMark Brown * Andrew Zabolotny <zap@homelink.ru> 9febf1dffSMark Brown * Russell King <rmk@arm.linux.org.uk> 10febf1dffSMark Brown * 11febf1dffSMark Brown * This program is free software; you can redistribute it and/or modify it 12febf1dffSMark Brown * under the terms of the GNU General Public License as published by the 13febf1dffSMark Brown * Free Software Foundation; either version 2 of the License, or (at your 14febf1dffSMark Brown * option) any later version. 15febf1dffSMark Brown * 16febf1dffSMark Brown * Notes: 17febf1dffSMark Brown * 18febf1dffSMark Brown * Features: 19febf1dffSMark Brown * - supports WM9705, WM9712, WM9713 20febf1dffSMark Brown * - polling mode 21febf1dffSMark Brown * - continuous mode (arch-dependent) 22febf1dffSMark Brown * - adjustable rpu/dpp settings 23febf1dffSMark Brown * - adjustable pressure current 24febf1dffSMark Brown * - adjustable sample settle delay 25febf1dffSMark Brown * - 4 and 5 wire touchscreens (5 wire is WM9712 only) 26febf1dffSMark Brown * - pen down detection 27febf1dffSMark Brown * - battery monitor 28febf1dffSMark Brown * - sample AUX adcs 29febf1dffSMark Brown * - power management 30febf1dffSMark Brown * - codec GPIO 31febf1dffSMark Brown * - codec event notification 32febf1dffSMark Brown * Todo 33febf1dffSMark Brown * - Support for async sampling control for noisy LCDs. 34febf1dffSMark Brown * 35febf1dffSMark Brown */ 36febf1dffSMark Brown 37febf1dffSMark Brown #include <linux/module.h> 38febf1dffSMark Brown #include <linux/moduleparam.h> 39febf1dffSMark Brown #include <linux/kernel.h> 40febf1dffSMark Brown #include <linux/init.h> 41febf1dffSMark Brown #include <linux/delay.h> 42febf1dffSMark Brown #include <linux/string.h> 43febf1dffSMark Brown #include <linux/proc_fs.h> 44febf1dffSMark Brown #include <linux/pm.h> 45febf1dffSMark Brown #include <linux/interrupt.h> 46febf1dffSMark Brown #include <linux/bitops.h> 47ae9d1b5fSRobert Jarzmik #include <linux/mfd/wm97xx.h> 48febf1dffSMark Brown #include <linux/workqueue.h> 49febf1dffSMark Brown #include <linux/wm97xx.h> 50febf1dffSMark Brown #include <linux/uaccess.h> 51febf1dffSMark Brown #include <linux/io.h> 525a0e3ad6STejun Heo #include <linux/slab.h> 53febf1dffSMark Brown 54febf1dffSMark Brown #define TS_NAME "wm97xx" 55febf1dffSMark Brown #define WM_CORE_VERSION "1.00" 56febf1dffSMark Brown #define DEFAULT_PRESSURE 0xb0c0 57febf1dffSMark Brown 58febf1dffSMark Brown 59febf1dffSMark Brown /* 60febf1dffSMark Brown * Touchscreen absolute values 61febf1dffSMark Brown * 62febf1dffSMark Brown * These parameters are used to help the input layer discard out of 63febf1dffSMark Brown * range readings and reduce jitter etc. 64febf1dffSMark Brown * 65febf1dffSMark Brown * o min, max:- indicate the min and max values your touch screen returns 66febf1dffSMark Brown * o fuzz:- use a higher number to reduce jitter 67febf1dffSMark Brown * 68febf1dffSMark Brown * The default values correspond to Mainstone II in QVGA mode 69febf1dffSMark Brown * 70febf1dffSMark Brown * Please read 71febf1dffSMark Brown * Documentation/input/input-programming.txt for more details. 72febf1dffSMark Brown */ 73febf1dffSMark Brown 74859abd1dSDmitry Eremin-Solenikov static int abs_x[3] = {150, 4000, 5}; 75febf1dffSMark Brown module_param_array(abs_x, int, NULL, 0); 76febf1dffSMark Brown MODULE_PARM_DESC(abs_x, "Touchscreen absolute X min, max, fuzz"); 77febf1dffSMark Brown 78859abd1dSDmitry Eremin-Solenikov static int abs_y[3] = {200, 4000, 40}; 79febf1dffSMark Brown module_param_array(abs_y, int, NULL, 0); 80febf1dffSMark Brown MODULE_PARM_DESC(abs_y, "Touchscreen absolute Y min, max, fuzz"); 81febf1dffSMark Brown 82febf1dffSMark Brown static int abs_p[3] = {0, 150, 4}; 83febf1dffSMark Brown module_param_array(abs_p, int, NULL, 0); 84febf1dffSMark Brown MODULE_PARM_DESC(abs_p, "Touchscreen absolute Pressure min, max, fuzz"); 85febf1dffSMark Brown 86febf1dffSMark Brown /* 87febf1dffSMark Brown * wm97xx IO access, all IO locking done by AC97 layer 88febf1dffSMark Brown */ 89febf1dffSMark Brown int wm97xx_reg_read(struct wm97xx *wm, u16 reg) 90febf1dffSMark Brown { 91febf1dffSMark Brown if (wm->ac97) 92febf1dffSMark Brown return wm->ac97->bus->ops->read(wm->ac97, reg); 93febf1dffSMark Brown else 94febf1dffSMark Brown return -1; 95febf1dffSMark Brown } 96febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_reg_read); 97febf1dffSMark Brown 98febf1dffSMark Brown void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val) 99febf1dffSMark Brown { 100febf1dffSMark Brown /* cache digitiser registers */ 101febf1dffSMark Brown if (reg >= AC97_WM9713_DIG1 && reg <= AC97_WM9713_DIG3) 102febf1dffSMark Brown wm->dig[(reg - AC97_WM9713_DIG1) >> 1] = val; 103febf1dffSMark Brown 104febf1dffSMark Brown /* cache gpio regs */ 105febf1dffSMark Brown if (reg >= AC97_GPIO_CFG && reg <= AC97_MISC_AFE) 106febf1dffSMark Brown wm->gpio[(reg - AC97_GPIO_CFG) >> 1] = val; 107febf1dffSMark Brown 108febf1dffSMark Brown /* wm9713 irq reg */ 109febf1dffSMark Brown if (reg == 0x5a) 110febf1dffSMark Brown wm->misc = val; 111febf1dffSMark Brown 112febf1dffSMark Brown if (wm->ac97) 113febf1dffSMark Brown wm->ac97->bus->ops->write(wm->ac97, reg, val); 114febf1dffSMark Brown } 115febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_reg_write); 116febf1dffSMark Brown 117febf1dffSMark Brown /** 118febf1dffSMark Brown * wm97xx_read_aux_adc - Read the aux adc. 119febf1dffSMark Brown * @wm: wm97xx device. 120febf1dffSMark Brown * @adcsel: codec ADC to be read 121febf1dffSMark Brown * 122febf1dffSMark Brown * Reads the selected AUX ADC. 123febf1dffSMark Brown */ 124febf1dffSMark Brown 125febf1dffSMark Brown int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel) 126febf1dffSMark Brown { 127febf1dffSMark Brown int power_adc = 0, auxval; 128febf1dffSMark Brown u16 power = 0; 129eb54ddd4SEric Millbrandt int rc = 0; 130eb54ddd4SEric Millbrandt int timeout = 0; 131febf1dffSMark Brown 132febf1dffSMark Brown /* get codec */ 133febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 134febf1dffSMark Brown 135febf1dffSMark Brown /* When the touchscreen is not in use, we may have to power up 136febf1dffSMark Brown * the AUX ADC before we can use sample the AUX inputs-> 137febf1dffSMark Brown */ 138febf1dffSMark Brown if (wm->id == WM9713_ID2 && 139febf1dffSMark Brown (power = wm97xx_reg_read(wm, AC97_EXTENDED_MID)) & 0x8000) { 140febf1dffSMark Brown power_adc = 1; 141febf1dffSMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, power & 0x7fff); 142febf1dffSMark Brown } 143febf1dffSMark Brown 144febf1dffSMark Brown /* Prepare the codec for AUX reading */ 145febf1dffSMark Brown wm->codec->aux_prepare(wm); 146febf1dffSMark Brown 147febf1dffSMark Brown /* Turn polling mode on to read AUX ADC */ 148febf1dffSMark Brown wm->pen_probably_down = 1; 149eb54ddd4SEric Millbrandt 150eb54ddd4SEric Millbrandt while (rc != RC_VALID && timeout++ < 5) 151eb54ddd4SEric Millbrandt rc = wm->codec->poll_sample(wm, adcsel, &auxval); 152febf1dffSMark Brown 153febf1dffSMark Brown if (power_adc) 154febf1dffSMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000); 155febf1dffSMark Brown 156febf1dffSMark Brown wm->codec->dig_restore(wm); 157febf1dffSMark Brown 158febf1dffSMark Brown wm->pen_probably_down = 0; 159febf1dffSMark Brown 160eb54ddd4SEric Millbrandt if (timeout >= 5) { 161eb54ddd4SEric Millbrandt dev_err(wm->dev, 162eb54ddd4SEric Millbrandt "timeout reading auxadc %d, disabling digitiser\n", 163eb54ddd4SEric Millbrandt adcsel); 164eb54ddd4SEric Millbrandt wm->codec->dig_enable(wm, false); 165eb54ddd4SEric Millbrandt } 166eb54ddd4SEric Millbrandt 167febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 168eb54ddd4SEric Millbrandt return (rc == RC_VALID ? auxval & 0xfff : -EBUSY); 169febf1dffSMark Brown } 170febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc); 171febf1dffSMark Brown 172febf1dffSMark Brown /** 173febf1dffSMark Brown * wm97xx_get_gpio - Get the status of a codec GPIO. 174febf1dffSMark Brown * @wm: wm97xx device. 175febf1dffSMark Brown * @gpio: gpio 176febf1dffSMark Brown * 177febf1dffSMark Brown * Get the status of a codec GPIO pin 178febf1dffSMark Brown */ 179febf1dffSMark Brown 180febf1dffSMark Brown enum wm97xx_gpio_status wm97xx_get_gpio(struct wm97xx *wm, u32 gpio) 181febf1dffSMark Brown { 182febf1dffSMark Brown u16 status; 183febf1dffSMark Brown enum wm97xx_gpio_status ret; 184febf1dffSMark Brown 185febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 186febf1dffSMark Brown status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 187febf1dffSMark Brown 188febf1dffSMark Brown if (status & gpio) 189febf1dffSMark Brown ret = WM97XX_GPIO_HIGH; 190febf1dffSMark Brown else 191febf1dffSMark Brown ret = WM97XX_GPIO_LOW; 192febf1dffSMark Brown 193febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 194febf1dffSMark Brown return ret; 195febf1dffSMark Brown } 196febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_get_gpio); 197febf1dffSMark Brown 198febf1dffSMark Brown /** 199febf1dffSMark Brown * wm97xx_set_gpio - Set the status of a codec GPIO. 200febf1dffSMark Brown * @wm: wm97xx device. 201febf1dffSMark Brown * @gpio: gpio 202febf1dffSMark Brown * 203febf1dffSMark Brown * 204febf1dffSMark Brown * Set the status of a codec GPIO pin 205febf1dffSMark Brown */ 206febf1dffSMark Brown 207febf1dffSMark Brown void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio, 208febf1dffSMark Brown enum wm97xx_gpio_status status) 209febf1dffSMark Brown { 210febf1dffSMark Brown u16 reg; 211febf1dffSMark Brown 212febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 213febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 214febf1dffSMark Brown 215af8b01b0SManuel Lauss if (status == WM97XX_GPIO_HIGH) 216febf1dffSMark Brown reg |= gpio; 217febf1dffSMark Brown else 218febf1dffSMark Brown reg &= ~gpio; 219febf1dffSMark Brown 22099fde513SMarek Vasut if (wm->id == WM9712_ID2 && wm->variant != WM97xx_WM1613) 221febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg << 1); 222febf1dffSMark Brown else 223febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg); 224febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 225febf1dffSMark Brown } 226febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_set_gpio); 227febf1dffSMark Brown 228febf1dffSMark Brown /* 229febf1dffSMark Brown * Codec GPIO pin configuration, this sets pin direction, polarity, 230febf1dffSMark Brown * stickyness and wake up. 231febf1dffSMark Brown */ 232febf1dffSMark Brown void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, enum wm97xx_gpio_dir dir, 233febf1dffSMark Brown enum wm97xx_gpio_pol pol, enum wm97xx_gpio_sticky sticky, 234febf1dffSMark Brown enum wm97xx_gpio_wake wake) 235febf1dffSMark Brown { 236febf1dffSMark Brown u16 reg; 237febf1dffSMark Brown 238febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 239febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); 240febf1dffSMark Brown 241febf1dffSMark Brown if (pol == WM97XX_GPIO_POL_HIGH) 242febf1dffSMark Brown reg |= gpio; 243febf1dffSMark Brown else 244febf1dffSMark Brown reg &= ~gpio; 245febf1dffSMark Brown 246febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, reg); 247febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_STICKY); 248febf1dffSMark Brown 249febf1dffSMark Brown if (sticky == WM97XX_GPIO_STICKY) 250febf1dffSMark Brown reg |= gpio; 251febf1dffSMark Brown else 252febf1dffSMark Brown reg &= ~gpio; 253febf1dffSMark Brown 254febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STICKY, reg); 255febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); 256febf1dffSMark Brown 257febf1dffSMark Brown if (wake == WM97XX_GPIO_WAKE) 258febf1dffSMark Brown reg |= gpio; 259febf1dffSMark Brown else 260febf1dffSMark Brown reg &= ~gpio; 261febf1dffSMark Brown 262febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, reg); 263febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); 264febf1dffSMark Brown 265febf1dffSMark Brown if (dir == WM97XX_GPIO_IN) 266febf1dffSMark Brown reg |= gpio; 267febf1dffSMark Brown else 268febf1dffSMark Brown reg &= ~gpio; 269febf1dffSMark Brown 270febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_CFG, reg); 271febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 272febf1dffSMark Brown } 273febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_config_gpio); 274febf1dffSMark Brown 275febf1dffSMark Brown /* 27634d27853SMark Brown * Configure the WM97XX_PRP value to use while system is suspended. 27734d27853SMark Brown * If a value other than 0 is set then WM97xx pen detection will be 27834d27853SMark Brown * left enabled in the configured mode while the system is in suspend, 27934d27853SMark Brown * the device has users and suspend has not been disabled via the 28034d27853SMark Brown * wakeup sysfs entries. 28134d27853SMark Brown * 28234d27853SMark Brown * @wm: WM97xx device to configure 28334d27853SMark Brown * @mode: WM97XX_PRP value to configure while suspended 28434d27853SMark Brown */ 28534d27853SMark Brown void wm97xx_set_suspend_mode(struct wm97xx *wm, u16 mode) 28634d27853SMark Brown { 28734d27853SMark Brown wm->suspend_mode = mode; 28834d27853SMark Brown device_init_wakeup(&wm->input_dev->dev, mode != 0); 28934d27853SMark Brown } 29034d27853SMark Brown EXPORT_SYMBOL_GPL(wm97xx_set_suspend_mode); 29134d27853SMark Brown 29234d27853SMark Brown /* 293febf1dffSMark Brown * Handle a pen down interrupt. 294febf1dffSMark Brown */ 295febf1dffSMark Brown static void wm97xx_pen_irq_worker(struct work_struct *work) 296febf1dffSMark Brown { 297febf1dffSMark Brown struct wm97xx *wm = container_of(work, struct wm97xx, pen_event_work); 298febf1dffSMark Brown int pen_was_down = wm->pen_is_down; 299febf1dffSMark Brown 300febf1dffSMark Brown /* do we need to enable the touch panel reader */ 301febf1dffSMark Brown if (wm->id == WM9705_ID2) { 302febf1dffSMark Brown if (wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD) & 303febf1dffSMark Brown WM97XX_PEN_DOWN) 304febf1dffSMark Brown wm->pen_is_down = 1; 305febf1dffSMark Brown else 306febf1dffSMark Brown wm->pen_is_down = 0; 307febf1dffSMark Brown } else { 308febf1dffSMark Brown u16 status, pol; 309febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 310febf1dffSMark Brown status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 311febf1dffSMark Brown pol = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); 312febf1dffSMark Brown 313febf1dffSMark Brown if (WM97XX_GPIO_13 & pol & status) { 314febf1dffSMark Brown wm->pen_is_down = 1; 315febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol & 316febf1dffSMark Brown ~WM97XX_GPIO_13); 317febf1dffSMark Brown } else { 318febf1dffSMark Brown wm->pen_is_down = 0; 319febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol | 320febf1dffSMark Brown WM97XX_GPIO_13); 321febf1dffSMark Brown } 322febf1dffSMark Brown 32399fde513SMarek Vasut if (wm->id == WM9712_ID2 && wm->variant != WM97xx_WM1613) 324febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, (status & 325febf1dffSMark Brown ~WM97XX_GPIO_13) << 1); 326febf1dffSMark Brown else 327febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, status & 328febf1dffSMark Brown ~WM97XX_GPIO_13); 329febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 330febf1dffSMark Brown } 331febf1dffSMark Brown 332febf1dffSMark Brown /* If the system is not using continuous mode or it provides a 333febf1dffSMark Brown * pen down operation then we need to schedule polls while the 334febf1dffSMark Brown * pen is down. Otherwise the machine driver is responsible 335febf1dffSMark Brown * for scheduling reads. 336febf1dffSMark Brown */ 337febf1dffSMark Brown if (!wm->mach_ops->acc_enabled || wm->mach_ops->acc_pen_down) { 338febf1dffSMark Brown if (wm->pen_is_down && !pen_was_down) { 33925985edcSLucas De Marchi /* Data is not available immediately on pen down */ 340febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 1); 341febf1dffSMark Brown } 342febf1dffSMark Brown 343febf1dffSMark Brown /* Let ts_reader report the pen up for debounce. */ 344febf1dffSMark Brown if (!wm->pen_is_down && pen_was_down) 345febf1dffSMark Brown wm->pen_is_down = 1; 346febf1dffSMark Brown } 347febf1dffSMark Brown 348febf1dffSMark Brown if (!wm->pen_is_down && wm->mach_ops->acc_enabled) 349febf1dffSMark Brown wm->mach_ops->acc_pen_up(wm); 350febf1dffSMark Brown 351febf1dffSMark Brown wm->mach_ops->irq_enable(wm, 1); 352febf1dffSMark Brown } 353febf1dffSMark Brown 354febf1dffSMark Brown /* 355febf1dffSMark Brown * Codec PENDOWN irq handler 356febf1dffSMark Brown * 357febf1dffSMark Brown * We have to disable the codec interrupt in the handler because it 358febf1dffSMark Brown * can take up to 1ms to clear the interrupt source. We schedule a task 359d808fbe5SMark Brown * in a work queue to do the actual interaction with the chip. The 360d808fbe5SMark Brown * interrupt is then enabled again in the slow handler when the source 361d808fbe5SMark Brown * has been cleared. 362febf1dffSMark Brown */ 363febf1dffSMark Brown static irqreturn_t wm97xx_pen_interrupt(int irq, void *dev_id) 364febf1dffSMark Brown { 365febf1dffSMark Brown struct wm97xx *wm = dev_id; 366febf1dffSMark Brown 367d808fbe5SMark Brown if (!work_pending(&wm->pen_event_work)) { 368febf1dffSMark Brown wm->mach_ops->irq_enable(wm, 0); 369febf1dffSMark Brown queue_work(wm->ts_workq, &wm->pen_event_work); 370d808fbe5SMark Brown } 371febf1dffSMark Brown 372febf1dffSMark Brown return IRQ_HANDLED; 373febf1dffSMark Brown } 374febf1dffSMark Brown 375febf1dffSMark Brown /* 376febf1dffSMark Brown * initialise pen IRQ handler and workqueue 377febf1dffSMark Brown */ 378febf1dffSMark Brown static int wm97xx_init_pen_irq(struct wm97xx *wm) 379febf1dffSMark Brown { 380febf1dffSMark Brown u16 reg; 381febf1dffSMark Brown 382febf1dffSMark Brown /* If an interrupt is supplied an IRQ enable operation must also be 383febf1dffSMark Brown * provided. */ 384febf1dffSMark Brown BUG_ON(!wm->mach_ops->irq_enable); 385febf1dffSMark Brown 3864f295232SMark Brown if (request_irq(wm->pen_irq, wm97xx_pen_interrupt, IRQF_SHARED, 387febf1dffSMark Brown "wm97xx-pen", wm)) { 388febf1dffSMark Brown dev_err(wm->dev, 389febf1dffSMark Brown "Failed to register pen down interrupt, polling"); 390febf1dffSMark Brown wm->pen_irq = 0; 391febf1dffSMark Brown return -EINVAL; 392febf1dffSMark Brown } 393febf1dffSMark Brown 394febf1dffSMark Brown /* Configure GPIO as interrupt source on WM971x */ 395febf1dffSMark Brown if (wm->id != WM9705_ID2) { 396febf1dffSMark Brown BUG_ON(!wm->mach_ops->irq_gpio); 397febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_MISC_AFE); 398febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, 399febf1dffSMark Brown reg & ~(wm->mach_ops->irq_gpio)); 400febf1dffSMark Brown reg = wm97xx_reg_read(wm, 0x5a); 401febf1dffSMark Brown wm97xx_reg_write(wm, 0x5a, reg & ~0x0001); 402febf1dffSMark Brown } 403febf1dffSMark Brown 404febf1dffSMark Brown return 0; 405febf1dffSMark Brown } 406febf1dffSMark Brown 407febf1dffSMark Brown static int wm97xx_read_samples(struct wm97xx *wm) 408febf1dffSMark Brown { 409febf1dffSMark Brown struct wm97xx_data data; 410febf1dffSMark Brown int rc; 411febf1dffSMark Brown 412febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 413febf1dffSMark Brown 414febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 415febf1dffSMark Brown rc = wm->mach_ops->acc_pen_down(wm); 416febf1dffSMark Brown else 417febf1dffSMark Brown rc = wm->codec->poll_touch(wm, &data); 418febf1dffSMark Brown 419febf1dffSMark Brown if (rc & RC_PENUP) { 420febf1dffSMark Brown if (wm->pen_is_down) { 421febf1dffSMark Brown wm->pen_is_down = 0; 422febf1dffSMark Brown dev_dbg(wm->dev, "pen up\n"); 423febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_PRESSURE, 0); 42465db86acSMike Rapoport input_report_key(wm->input_dev, BTN_TOUCH, 0); 425febf1dffSMark Brown input_sync(wm->input_dev); 426febf1dffSMark Brown } else if (!(rc & RC_AGAIN)) { 427febf1dffSMark Brown /* We need high frequency updates only while 428febf1dffSMark Brown * pen is down, the user never will be able to 429febf1dffSMark Brown * touch screen faster than a few times per 430febf1dffSMark Brown * second... On the other hand, when the user 431febf1dffSMark Brown * is actively working with the touchscreen we 432febf1dffSMark Brown * don't want to lose the quick response. So we 433febf1dffSMark Brown * will slowly increase sleep time after the 434febf1dffSMark Brown * pen is up and quicky restore it to ~one task 435febf1dffSMark Brown * switch when pen is down again. 436febf1dffSMark Brown */ 437febf1dffSMark Brown if (wm->ts_reader_interval < HZ / 10) 438febf1dffSMark Brown wm->ts_reader_interval++; 439febf1dffSMark Brown } 440febf1dffSMark Brown 441febf1dffSMark Brown } else if (rc & RC_VALID) { 442febf1dffSMark Brown dev_dbg(wm->dev, 443febf1dffSMark Brown "pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n", 444febf1dffSMark Brown data.x >> 12, data.x & 0xfff, data.y >> 12, 445febf1dffSMark Brown data.y & 0xfff, data.p >> 12, data.p & 0xfff); 446cfd5d096SMarkus Pargmann 447cfd5d096SMarkus Pargmann if (abs_x[0] > (data.x & 0xfff) || 448cfd5d096SMarkus Pargmann abs_x[1] < (data.x & 0xfff) || 449cfd5d096SMarkus Pargmann abs_y[0] > (data.y & 0xfff) || 450cfd5d096SMarkus Pargmann abs_y[1] < (data.y & 0xfff)) { 451cfd5d096SMarkus Pargmann dev_dbg(wm->dev, "Measurement out of range, dropping it\n"); 452cfd5d096SMarkus Pargmann rc = RC_AGAIN; 453cfd5d096SMarkus Pargmann goto out; 454cfd5d096SMarkus Pargmann } 455cfd5d096SMarkus Pargmann 456febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_X, data.x & 0xfff); 457febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_Y, data.y & 0xfff); 458febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_PRESSURE, data.p & 0xfff); 45965db86acSMike Rapoport input_report_key(wm->input_dev, BTN_TOUCH, 1); 460febf1dffSMark Brown input_sync(wm->input_dev); 461febf1dffSMark Brown wm->pen_is_down = 1; 462febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 463febf1dffSMark Brown } else if (rc & RC_PENDOWN) { 464febf1dffSMark Brown dev_dbg(wm->dev, "pen down\n"); 465febf1dffSMark Brown wm->pen_is_down = 1; 466febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 467febf1dffSMark Brown } 468febf1dffSMark Brown 469cfd5d096SMarkus Pargmann out: 470febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 471febf1dffSMark Brown return rc; 472febf1dffSMark Brown } 473febf1dffSMark Brown 474febf1dffSMark Brown /* 475febf1dffSMark Brown * The touchscreen sample reader. 476febf1dffSMark Brown */ 477febf1dffSMark Brown static void wm97xx_ts_reader(struct work_struct *work) 478febf1dffSMark Brown { 479febf1dffSMark Brown int rc; 480febf1dffSMark Brown struct wm97xx *wm = container_of(work, struct wm97xx, ts_reader.work); 481febf1dffSMark Brown 482febf1dffSMark Brown BUG_ON(!wm->codec); 483febf1dffSMark Brown 484febf1dffSMark Brown do { 485febf1dffSMark Brown rc = wm97xx_read_samples(wm); 486febf1dffSMark Brown } while (rc & RC_AGAIN); 487febf1dffSMark Brown 488febf1dffSMark Brown if (wm->pen_is_down || !wm->pen_irq) 489febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 490febf1dffSMark Brown wm->ts_reader_interval); 491febf1dffSMark Brown } 492febf1dffSMark Brown 493febf1dffSMark Brown /** 494febf1dffSMark Brown * wm97xx_ts_input_open - Open the touch screen input device. 495febf1dffSMark Brown * @idev: Input device to be opened. 496febf1dffSMark Brown * 497febf1dffSMark Brown * Called by the input sub system to open a wm97xx touchscreen device. 498febf1dffSMark Brown * Starts the touchscreen thread and touch digitiser. 499febf1dffSMark Brown */ 500febf1dffSMark Brown static int wm97xx_ts_input_open(struct input_dev *idev) 501febf1dffSMark Brown { 502febf1dffSMark Brown struct wm97xx *wm = input_get_drvdata(idev); 503febf1dffSMark Brown 504c9a3a7cfSBhaktipriya Shridhar wm->ts_workq = alloc_ordered_workqueue("kwm97xx", 0); 505febf1dffSMark Brown if (wm->ts_workq == NULL) { 506febf1dffSMark Brown dev_err(wm->dev, 507febf1dffSMark Brown "Failed to create workqueue\n"); 508febf1dffSMark Brown return -EINVAL; 509febf1dffSMark Brown } 510febf1dffSMark Brown 511febf1dffSMark Brown /* start digitiser */ 512febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 513febf1dffSMark Brown wm->codec->acc_enable(wm, 1); 514febf1dffSMark Brown wm->codec->dig_enable(wm, 1); 515febf1dffSMark Brown 516febf1dffSMark Brown INIT_DELAYED_WORK(&wm->ts_reader, wm97xx_ts_reader); 517febf1dffSMark Brown INIT_WORK(&wm->pen_event_work, wm97xx_pen_irq_worker); 518febf1dffSMark Brown 519febf1dffSMark Brown wm->ts_reader_min_interval = HZ >= 100 ? HZ / 100 : 1; 520febf1dffSMark Brown if (wm->ts_reader_min_interval < 1) 521febf1dffSMark Brown wm->ts_reader_min_interval = 1; 522febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 523febf1dffSMark Brown 524febf1dffSMark Brown wm->pen_is_down = 0; 525febf1dffSMark Brown if (wm->pen_irq) 526febf1dffSMark Brown wm97xx_init_pen_irq(wm); 527febf1dffSMark Brown else 528febf1dffSMark Brown dev_err(wm->dev, "No IRQ specified\n"); 529febf1dffSMark Brown 530febf1dffSMark Brown /* If we either don't have an interrupt for pen down events or 531febf1dffSMark Brown * failed to acquire it then we need to poll. 532febf1dffSMark Brown */ 533febf1dffSMark Brown if (wm->pen_irq == 0) 534febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 535febf1dffSMark Brown wm->ts_reader_interval); 536febf1dffSMark Brown 537febf1dffSMark Brown return 0; 538febf1dffSMark Brown } 539febf1dffSMark Brown 540febf1dffSMark Brown /** 541febf1dffSMark Brown * wm97xx_ts_input_close - Close the touch screen input device. 542febf1dffSMark Brown * @idev: Input device to be closed. 543febf1dffSMark Brown * 544febf1dffSMark Brown * Called by the input sub system to close a wm97xx touchscreen 545febf1dffSMark Brown * device. Kills the touchscreen thread and stops the touch 546febf1dffSMark Brown * digitiser. 547febf1dffSMark Brown */ 548febf1dffSMark Brown 549febf1dffSMark Brown static void wm97xx_ts_input_close(struct input_dev *idev) 550febf1dffSMark Brown { 551febf1dffSMark Brown struct wm97xx *wm = input_get_drvdata(idev); 552febf1dffSMark Brown u16 reg; 553febf1dffSMark Brown 554febf1dffSMark Brown if (wm->pen_irq) { 555febf1dffSMark Brown /* Return the interrupt to GPIO usage (disabling it) */ 556febf1dffSMark Brown if (wm->id != WM9705_ID2) { 557febf1dffSMark Brown BUG_ON(!wm->mach_ops->irq_gpio); 558febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_MISC_AFE); 559febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, 560febf1dffSMark Brown reg | wm->mach_ops->irq_gpio); 561febf1dffSMark Brown } 562febf1dffSMark Brown 563febf1dffSMark Brown free_irq(wm->pen_irq, wm); 564febf1dffSMark Brown } 565febf1dffSMark Brown 566febf1dffSMark Brown wm->pen_is_down = 0; 567febf1dffSMark Brown 568febf1dffSMark Brown /* Balance out interrupt disables/enables */ 569febf1dffSMark Brown if (cancel_work_sync(&wm->pen_event_work)) 570febf1dffSMark Brown wm->mach_ops->irq_enable(wm, 1); 571febf1dffSMark Brown 572febf1dffSMark Brown /* ts_reader rearms itself so we need to explicitly stop it 573febf1dffSMark Brown * before we destroy the workqueue. 574febf1dffSMark Brown */ 575febf1dffSMark Brown cancel_delayed_work_sync(&wm->ts_reader); 576febf1dffSMark Brown 577febf1dffSMark Brown destroy_workqueue(wm->ts_workq); 578febf1dffSMark Brown 579febf1dffSMark Brown /* stop digitiser */ 580febf1dffSMark Brown wm->codec->dig_enable(wm, 0); 581febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 582febf1dffSMark Brown wm->codec->acc_enable(wm, 0); 583febf1dffSMark Brown } 584febf1dffSMark Brown 585c72f61e7SRobert Jarzmik static int wm97xx_register_touch(struct wm97xx *wm) 586febf1dffSMark Brown { 587c72f61e7SRobert Jarzmik struct wm97xx_pdata *pdata = dev_get_platdata(wm->dev); 588c72f61e7SRobert Jarzmik int ret; 589febf1dffSMark Brown 590c72f61e7SRobert Jarzmik wm->input_dev = devm_input_allocate_device(wm->dev); 591c72f61e7SRobert Jarzmik if (wm->input_dev == NULL) 592febf1dffSMark Brown return -ENOMEM; 593febf1dffSMark Brown 594c72f61e7SRobert Jarzmik /* set up touch configuration */ 595c72f61e7SRobert Jarzmik wm->input_dev->name = "wm97xx touchscreen"; 596c72f61e7SRobert Jarzmik wm->input_dev->phys = "wm97xx"; 597c72f61e7SRobert Jarzmik wm->input_dev->open = wm97xx_ts_input_open; 598c72f61e7SRobert Jarzmik wm->input_dev->close = wm97xx_ts_input_close; 599c72f61e7SRobert Jarzmik 600c72f61e7SRobert Jarzmik __set_bit(EV_ABS, wm->input_dev->evbit); 601c72f61e7SRobert Jarzmik __set_bit(EV_KEY, wm->input_dev->evbit); 602c72f61e7SRobert Jarzmik __set_bit(BTN_TOUCH, wm->input_dev->keybit); 603c72f61e7SRobert Jarzmik 604c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_X, abs_x[0], abs_x[1], 605c72f61e7SRobert Jarzmik abs_x[2], 0); 606c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_Y, abs_y[0], abs_y[1], 607c72f61e7SRobert Jarzmik abs_y[2], 0); 608c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_PRESSURE, abs_p[0], abs_p[1], 609c72f61e7SRobert Jarzmik abs_p[2], 0); 610c72f61e7SRobert Jarzmik 611c72f61e7SRobert Jarzmik input_set_drvdata(wm->input_dev, wm); 612c72f61e7SRobert Jarzmik wm->input_dev->dev.parent = wm->dev; 613c72f61e7SRobert Jarzmik 614c72f61e7SRobert Jarzmik ret = input_register_device(wm->input_dev); 615c72f61e7SRobert Jarzmik if (ret) 616c72f61e7SRobert Jarzmik return ret; 617c72f61e7SRobert Jarzmik 618c72f61e7SRobert Jarzmik /* 619c72f61e7SRobert Jarzmik * register our extended touch device (for machine specific 620c72f61e7SRobert Jarzmik * extensions) 621c72f61e7SRobert Jarzmik */ 622c72f61e7SRobert Jarzmik wm->touch_dev = platform_device_alloc("wm97xx-touch", -1); 623c72f61e7SRobert Jarzmik if (!wm->touch_dev) { 624c72f61e7SRobert Jarzmik ret = -ENOMEM; 625c72f61e7SRobert Jarzmik goto touch_err; 626c72f61e7SRobert Jarzmik } 627c72f61e7SRobert Jarzmik platform_set_drvdata(wm->touch_dev, wm); 628c72f61e7SRobert Jarzmik wm->touch_dev->dev.parent = wm->dev; 629c72f61e7SRobert Jarzmik wm->touch_dev->dev.platform_data = pdata; 630c72f61e7SRobert Jarzmik ret = platform_device_add(wm->touch_dev); 631c72f61e7SRobert Jarzmik if (ret < 0) 632c72f61e7SRobert Jarzmik goto touch_reg_err; 633c72f61e7SRobert Jarzmik 634c72f61e7SRobert Jarzmik return 0; 635c72f61e7SRobert Jarzmik touch_reg_err: 636c72f61e7SRobert Jarzmik platform_device_put(wm->touch_dev); 637c72f61e7SRobert Jarzmik touch_err: 638c72f61e7SRobert Jarzmik input_unregister_device(wm->input_dev); 639c72f61e7SRobert Jarzmik wm->input_dev = NULL; 640c72f61e7SRobert Jarzmik 641c72f61e7SRobert Jarzmik return ret; 642c72f61e7SRobert Jarzmik } 643c72f61e7SRobert Jarzmik 644c72f61e7SRobert Jarzmik static void wm97xx_unregister_touch(struct wm97xx *wm) 645c72f61e7SRobert Jarzmik { 646c72f61e7SRobert Jarzmik platform_device_unregister(wm->touch_dev); 647c72f61e7SRobert Jarzmik input_unregister_device(wm->input_dev); 648c72f61e7SRobert Jarzmik wm->input_dev = NULL; 649c72f61e7SRobert Jarzmik } 650c72f61e7SRobert Jarzmik 651c72f61e7SRobert Jarzmik static int _wm97xx_probe(struct wm97xx *wm) 652c72f61e7SRobert Jarzmik { 653c72f61e7SRobert Jarzmik int id = 0; 654c72f61e7SRobert Jarzmik 655c72f61e7SRobert Jarzmik mutex_init(&wm->codec_mutex); 656c72f61e7SRobert Jarzmik dev_set_drvdata(wm->dev, wm); 657febf1dffSMark Brown 658febf1dffSMark Brown /* check that we have a supported codec */ 659febf1dffSMark Brown id = wm97xx_reg_read(wm, AC97_VENDOR_ID1); 660febf1dffSMark Brown if (id != WM97XX_ID1) { 661c72f61e7SRobert Jarzmik dev_err(wm->dev, 662c72f61e7SRobert Jarzmik "Device with vendor %04x is not a wm97xx\n", id); 663c72f61e7SRobert Jarzmik return -ENODEV; 664febf1dffSMark Brown } 665febf1dffSMark Brown 666febf1dffSMark Brown wm->id = wm97xx_reg_read(wm, AC97_VENDOR_ID2); 667febf1dffSMark Brown 66899fde513SMarek Vasut wm->variant = WM97xx_GENERIC; 66999fde513SMarek Vasut 670febf1dffSMark Brown dev_info(wm->dev, "detected a wm97%02x codec\n", wm->id & 0xff); 671febf1dffSMark Brown 672febf1dffSMark Brown switch (wm->id & 0xff) { 673febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9705 674febf1dffSMark Brown case 0x05: 675febf1dffSMark Brown wm->codec = &wm9705_codec; 676febf1dffSMark Brown break; 677febf1dffSMark Brown #endif 678febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9712 679febf1dffSMark Brown case 0x12: 680febf1dffSMark Brown wm->codec = &wm9712_codec; 681febf1dffSMark Brown break; 682febf1dffSMark Brown #endif 683febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9713 684febf1dffSMark Brown case 0x13: 685febf1dffSMark Brown wm->codec = &wm9713_codec; 686febf1dffSMark Brown break; 687febf1dffSMark Brown #endif 688febf1dffSMark Brown default: 689febf1dffSMark Brown dev_err(wm->dev, "Support for wm97%02x not compiled in.\n", 690febf1dffSMark Brown wm->id & 0xff); 691c72f61e7SRobert Jarzmik return -ENODEV; 692febf1dffSMark Brown } 693febf1dffSMark Brown 6945de4cd43SMark Brown /* set up physical characteristics */ 6955de4cd43SMark Brown wm->codec->phy_init(wm); 6965de4cd43SMark Brown 6975de4cd43SMark Brown /* load gpio cache */ 6985de4cd43SMark Brown wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG); 6995de4cd43SMark Brown wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); 7005de4cd43SMark Brown wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY); 7015de4cd43SMark Brown wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); 7025de4cd43SMark Brown wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 7035de4cd43SMark Brown wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE); 7045de4cd43SMark Brown 705c72f61e7SRobert Jarzmik return wm97xx_register_touch(wm); 706febf1dffSMark Brown } 707febf1dffSMark Brown 708c72f61e7SRobert Jarzmik static void wm97xx_remove_battery(struct wm97xx *wm) 709c72f61e7SRobert Jarzmik { 710c72f61e7SRobert Jarzmik platform_device_unregister(wm->battery_dev); 711c72f61e7SRobert Jarzmik } 71265db86acSMike Rapoport 713c72f61e7SRobert Jarzmik static int wm97xx_add_battery(struct wm97xx *wm, 714c72f61e7SRobert Jarzmik struct wm97xx_batt_pdata *pdata) 715c72f61e7SRobert Jarzmik { 716c72f61e7SRobert Jarzmik int ret; 71765db86acSMike Rapoport 718febf1dffSMark Brown wm->battery_dev = platform_device_alloc("wm97xx-battery", -1); 719c72f61e7SRobert Jarzmik if (!wm->battery_dev) 720c72f61e7SRobert Jarzmik return -ENOMEM; 721febf1dffSMark Brown 722c72f61e7SRobert Jarzmik platform_set_drvdata(wm->battery_dev, wm); 723c72f61e7SRobert Jarzmik wm->battery_dev->dev.parent = wm->dev; 724c72f61e7SRobert Jarzmik wm->battery_dev->dev.platform_data = pdata; 725c72f61e7SRobert Jarzmik ret = platform_device_add(wm->battery_dev); 726c72f61e7SRobert Jarzmik if (ret) 727c72f61e7SRobert Jarzmik platform_device_put(wm->battery_dev); 728c72f61e7SRobert Jarzmik 729c72f61e7SRobert Jarzmik return ret; 730febf1dffSMark Brown } 731c72f61e7SRobert Jarzmik 732c72f61e7SRobert Jarzmik static int wm97xx_probe(struct device *dev) 733c72f61e7SRobert Jarzmik { 734c72f61e7SRobert Jarzmik struct wm97xx *wm; 735c72f61e7SRobert Jarzmik int ret; 736c72f61e7SRobert Jarzmik struct wm97xx_pdata *pdata = dev_get_platdata(dev); 737c72f61e7SRobert Jarzmik 738c72f61e7SRobert Jarzmik wm = devm_kzalloc(dev, sizeof(struct wm97xx), GFP_KERNEL); 739c72f61e7SRobert Jarzmik if (!wm) 740c72f61e7SRobert Jarzmik return -ENOMEM; 741c72f61e7SRobert Jarzmik 742c72f61e7SRobert Jarzmik wm->dev = dev; 743c72f61e7SRobert Jarzmik wm->ac97 = to_ac97_t(dev); 744c72f61e7SRobert Jarzmik 745c72f61e7SRobert Jarzmik ret = _wm97xx_probe(wm); 746c72f61e7SRobert Jarzmik if (ret) 747c72f61e7SRobert Jarzmik return ret; 748c72f61e7SRobert Jarzmik 749c72f61e7SRobert Jarzmik ret = wm97xx_add_battery(wm, pdata ? pdata->batt_pdata : NULL); 750febf1dffSMark Brown if (ret < 0) 751c72f61e7SRobert Jarzmik goto batt_err; 752febf1dffSMark Brown 753febf1dffSMark Brown return ret; 754febf1dffSMark Brown 755febf1dffSMark Brown batt_err: 756c72f61e7SRobert Jarzmik wm97xx_unregister_touch(wm); 757febf1dffSMark Brown return ret; 758febf1dffSMark Brown } 759febf1dffSMark Brown 760febf1dffSMark Brown static int wm97xx_remove(struct device *dev) 761febf1dffSMark Brown { 762febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 763febf1dffSMark Brown 764c72f61e7SRobert Jarzmik wm97xx_remove_battery(wm); 765c72f61e7SRobert Jarzmik wm97xx_unregister_touch(wm); 766febf1dffSMark Brown 767febf1dffSMark Brown return 0; 768febf1dffSMark Brown } 769febf1dffSMark Brown 770ae9d1b5fSRobert Jarzmik static int wm97xx_mfd_probe(struct platform_device *pdev) 771ae9d1b5fSRobert Jarzmik { 772ae9d1b5fSRobert Jarzmik struct wm97xx *wm; 773ae9d1b5fSRobert Jarzmik struct wm97xx_platform_data *mfd_pdata = dev_get_platdata(&pdev->dev); 774ae9d1b5fSRobert Jarzmik int ret; 775ae9d1b5fSRobert Jarzmik 776ae9d1b5fSRobert Jarzmik wm = devm_kzalloc(&pdev->dev, sizeof(struct wm97xx), GFP_KERNEL); 777ae9d1b5fSRobert Jarzmik if (!wm) 778ae9d1b5fSRobert Jarzmik return -ENOMEM; 779ae9d1b5fSRobert Jarzmik 780ae9d1b5fSRobert Jarzmik wm->dev = &pdev->dev; 781ae9d1b5fSRobert Jarzmik wm->ac97 = mfd_pdata->ac97; 782ae9d1b5fSRobert Jarzmik 783ae9d1b5fSRobert Jarzmik ret = _wm97xx_probe(wm); 784ae9d1b5fSRobert Jarzmik if (ret) 785ae9d1b5fSRobert Jarzmik return ret; 786ae9d1b5fSRobert Jarzmik 787ae9d1b5fSRobert Jarzmik ret = wm97xx_add_battery(wm, mfd_pdata->batt_pdata); 788ae9d1b5fSRobert Jarzmik if (ret < 0) 789ae9d1b5fSRobert Jarzmik goto batt_err; 790ae9d1b5fSRobert Jarzmik 791ae9d1b5fSRobert Jarzmik return ret; 792ae9d1b5fSRobert Jarzmik 793ae9d1b5fSRobert Jarzmik batt_err: 794ae9d1b5fSRobert Jarzmik wm97xx_unregister_touch(wm); 795ae9d1b5fSRobert Jarzmik return ret; 796ae9d1b5fSRobert Jarzmik } 797ae9d1b5fSRobert Jarzmik 798ae9d1b5fSRobert Jarzmik static int wm97xx_mfd_remove(struct platform_device *pdev) 799ae9d1b5fSRobert Jarzmik { 800ae9d1b5fSRobert Jarzmik return wm97xx_remove(&pdev->dev); 801ae9d1b5fSRobert Jarzmik } 802ae9d1b5fSRobert Jarzmik 8039bc07dfbSLars-Peter Clausen static int __maybe_unused wm97xx_suspend(struct device *dev) 804febf1dffSMark Brown { 805febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 80634d27853SMark Brown u16 reg; 80734d27853SMark Brown int suspend_mode; 80834d27853SMark Brown 80934d27853SMark Brown if (device_may_wakeup(&wm->input_dev->dev)) 81034d27853SMark Brown suspend_mode = wm->suspend_mode; 81134d27853SMark Brown else 81234d27853SMark Brown suspend_mode = 0; 813febf1dffSMark Brown 814febf1dffSMark Brown if (wm->input_dev->users) 815febf1dffSMark Brown cancel_delayed_work_sync(&wm->ts_reader); 816febf1dffSMark Brown 81734d27853SMark Brown /* Power down the digitiser (bypassing the cache for resume) */ 81834d27853SMark Brown reg = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER2); 81934d27853SMark Brown reg &= ~WM97XX_PRP_DET_DIG; 82034d27853SMark Brown if (wm->input_dev->users) 82134d27853SMark Brown reg |= suspend_mode; 82234d27853SMark Brown wm->ac97->bus->ops->write(wm->ac97, AC97_WM97XX_DIGITISER2, reg); 82334d27853SMark Brown 82434d27853SMark Brown /* WM9713 has an additional power bit - turn it off if there 82534d27853SMark Brown * are no users or if suspend mode is zero. */ 82634d27853SMark Brown if (wm->id == WM9713_ID2 && 82734d27853SMark Brown (!wm->input_dev->users || !suspend_mode)) { 82834d27853SMark Brown reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) | 0x8000; 82934d27853SMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); 83034d27853SMark Brown } 83134d27853SMark Brown 832febf1dffSMark Brown return 0; 833febf1dffSMark Brown } 834febf1dffSMark Brown 8359bc07dfbSLars-Peter Clausen static int __maybe_unused wm97xx_resume(struct device *dev) 836febf1dffSMark Brown { 837febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 838febf1dffSMark Brown 839febf1dffSMark Brown /* restore digitiser and gpios */ 840febf1dffSMark Brown if (wm->id == WM9713_ID2) { 841febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig[0]); 842febf1dffSMark Brown wm97xx_reg_write(wm, 0x5a, wm->misc); 843febf1dffSMark Brown if (wm->input_dev->users) { 844febf1dffSMark Brown u16 reg; 845febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) & 0x7fff; 846febf1dffSMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); 847febf1dffSMark Brown } 848febf1dffSMark Brown } 849febf1dffSMark Brown 850febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig[1]); 851febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2]); 852febf1dffSMark Brown 853febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_CFG, wm->gpio[0]); 854febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, wm->gpio[1]); 855febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STICKY, wm->gpio[2]); 856febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, wm->gpio[3]); 857febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, wm->gpio[4]); 858febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, wm->gpio[5]); 859febf1dffSMark Brown 860febf1dffSMark Brown if (wm->input_dev->users && !wm->pen_irq) { 861febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 862febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 863febf1dffSMark Brown wm->ts_reader_interval); 864febf1dffSMark Brown } 865febf1dffSMark Brown 866febf1dffSMark Brown return 0; 867febf1dffSMark Brown } 868febf1dffSMark Brown 8699bc07dfbSLars-Peter Clausen static SIMPLE_DEV_PM_OPS(wm97xx_pm_ops, wm97xx_suspend, wm97xx_resume); 870febf1dffSMark Brown 871febf1dffSMark Brown /* 872febf1dffSMark Brown * Machine specific operations 873febf1dffSMark Brown */ 874febf1dffSMark Brown int wm97xx_register_mach_ops(struct wm97xx *wm, 875febf1dffSMark Brown struct wm97xx_mach_ops *mach_ops) 876febf1dffSMark Brown { 877febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 878febf1dffSMark Brown if (wm->mach_ops) { 879febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 880febf1dffSMark Brown return -EINVAL; 881febf1dffSMark Brown } 882febf1dffSMark Brown wm->mach_ops = mach_ops; 883febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 884febf1dffSMark Brown 885febf1dffSMark Brown return 0; 886febf1dffSMark Brown } 887febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_register_mach_ops); 888febf1dffSMark Brown 889febf1dffSMark Brown void wm97xx_unregister_mach_ops(struct wm97xx *wm) 890febf1dffSMark Brown { 891febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 892febf1dffSMark Brown wm->mach_ops = NULL; 893febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 894febf1dffSMark Brown } 895febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_unregister_mach_ops); 896febf1dffSMark Brown 897febf1dffSMark Brown static struct device_driver wm97xx_driver = { 898ef9db492SMark Brown .name = "wm97xx-ts", 899ae9d1b5fSRobert Jarzmik #ifdef CONFIG_AC97_BUS 900febf1dffSMark Brown .bus = &ac97_bus_type, 901ae9d1b5fSRobert Jarzmik #endif 902febf1dffSMark Brown .owner = THIS_MODULE, 903febf1dffSMark Brown .probe = wm97xx_probe, 904febf1dffSMark Brown .remove = wm97xx_remove, 9059bc07dfbSLars-Peter Clausen .pm = &wm97xx_pm_ops, 906febf1dffSMark Brown }; 907febf1dffSMark Brown 908ae9d1b5fSRobert Jarzmik static struct platform_driver wm97xx_mfd_driver = { 909ae9d1b5fSRobert Jarzmik .driver = { 910ae9d1b5fSRobert Jarzmik .name = "wm97xx-ts", 911ae9d1b5fSRobert Jarzmik .pm = &wm97xx_pm_ops, 912ae9d1b5fSRobert Jarzmik }, 913ae9d1b5fSRobert Jarzmik .probe = wm97xx_mfd_probe, 914ae9d1b5fSRobert Jarzmik .remove = wm97xx_mfd_remove, 915ae9d1b5fSRobert Jarzmik }; 916ae9d1b5fSRobert Jarzmik 917febf1dffSMark Brown static int __init wm97xx_init(void) 918febf1dffSMark Brown { 919ae9d1b5fSRobert Jarzmik int ret; 920ae9d1b5fSRobert Jarzmik 921ae9d1b5fSRobert Jarzmik ret = platform_driver_register(&wm97xx_mfd_driver); 922ae9d1b5fSRobert Jarzmik if (ret) 923ae9d1b5fSRobert Jarzmik return ret; 924ae9d1b5fSRobert Jarzmik 925ae9d1b5fSRobert Jarzmik if (IS_BUILTIN(CONFIG_AC97_BUS)) 926ae9d1b5fSRobert Jarzmik ret = driver_register(&wm97xx_driver); 927ae9d1b5fSRobert Jarzmik return ret; 928febf1dffSMark Brown } 929febf1dffSMark Brown 930febf1dffSMark Brown static void __exit wm97xx_exit(void) 931febf1dffSMark Brown { 932*a3f7c3fcSRandy Dunlap if (IS_BUILTIN(CONFIG_AC97_BUS)) 933febf1dffSMark Brown driver_unregister(&wm97xx_driver); 934ae9d1b5fSRobert Jarzmik platform_driver_unregister(&wm97xx_mfd_driver); 935febf1dffSMark Brown } 936febf1dffSMark Brown 937febf1dffSMark Brown module_init(wm97xx_init); 938febf1dffSMark Brown module_exit(wm97xx_exit); 939febf1dffSMark Brown 940febf1dffSMark Brown /* Module information */ 941b8d055a8SLiam Girdwood MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>"); 942febf1dffSMark Brown MODULE_DESCRIPTION("WM97xx Core - Touch Screen / AUX ADC / GPIO Driver"); 943febf1dffSMark Brown MODULE_LICENSE("GPL"); 944