12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2febf1dffSMark Brown /* 3febf1dffSMark Brown * wm97xx-core.c -- Touch screen driver core for Wolfson WM9705, WM9712 4febf1dffSMark Brown * and WM9713 AC97 Codecs. 5febf1dffSMark Brown * 6febf1dffSMark Brown * Copyright 2003, 2004, 2005, 2006, 2007, 2008 Wolfson Microelectronics PLC. 7b8d055a8SLiam Girdwood * Author: Liam Girdwood <lrg@slimlogic.co.uk> 8febf1dffSMark Brown * Parts Copyright : Ian Molton <spyro@f2s.com> 9febf1dffSMark Brown * Andrew Zabolotny <zap@homelink.ru> 10febf1dffSMark Brown * Russell King <rmk@arm.linux.org.uk> 11febf1dffSMark Brown * 12febf1dffSMark Brown * Notes: 13febf1dffSMark Brown * 14febf1dffSMark Brown * Features: 15febf1dffSMark Brown * - supports WM9705, WM9712, WM9713 16febf1dffSMark Brown * - polling mode 17febf1dffSMark Brown * - continuous mode (arch-dependent) 18febf1dffSMark Brown * - adjustable rpu/dpp settings 19febf1dffSMark Brown * - adjustable pressure current 20febf1dffSMark Brown * - adjustable sample settle delay 21febf1dffSMark Brown * - 4 and 5 wire touchscreens (5 wire is WM9712 only) 22febf1dffSMark Brown * - pen down detection 23febf1dffSMark Brown * - battery monitor 24febf1dffSMark Brown * - sample AUX adcs 25febf1dffSMark Brown * - power management 26febf1dffSMark Brown * - codec GPIO 27febf1dffSMark Brown * - codec event notification 28febf1dffSMark Brown * Todo 29febf1dffSMark Brown * - Support for async sampling control for noisy LCDs. 30febf1dffSMark Brown */ 31febf1dffSMark Brown 32febf1dffSMark Brown #include <linux/module.h> 33febf1dffSMark Brown #include <linux/moduleparam.h> 34febf1dffSMark Brown #include <linux/kernel.h> 35febf1dffSMark Brown #include <linux/init.h> 36febf1dffSMark Brown #include <linux/delay.h> 37febf1dffSMark Brown #include <linux/string.h> 38febf1dffSMark Brown #include <linux/proc_fs.h> 39febf1dffSMark Brown #include <linux/pm.h> 40febf1dffSMark Brown #include <linux/interrupt.h> 41febf1dffSMark Brown #include <linux/bitops.h> 42ae9d1b5fSRobert Jarzmik #include <linux/mfd/wm97xx.h> 43febf1dffSMark Brown #include <linux/workqueue.h> 44febf1dffSMark Brown #include <linux/wm97xx.h> 45febf1dffSMark Brown #include <linux/uaccess.h> 46febf1dffSMark Brown #include <linux/io.h> 475a0e3ad6STejun Heo #include <linux/slab.h> 48febf1dffSMark Brown 49febf1dffSMark Brown #define TS_NAME "wm97xx" 50febf1dffSMark Brown #define WM_CORE_VERSION "1.00" 51febf1dffSMark Brown #define DEFAULT_PRESSURE 0xb0c0 52febf1dffSMark Brown 53febf1dffSMark Brown 54febf1dffSMark Brown /* 55febf1dffSMark Brown * Touchscreen absolute values 56febf1dffSMark Brown * 57febf1dffSMark Brown * These parameters are used to help the input layer discard out of 58febf1dffSMark Brown * range readings and reduce jitter etc. 59febf1dffSMark Brown * 60febf1dffSMark Brown * o min, max:- indicate the min and max values your touch screen returns 61febf1dffSMark Brown * o fuzz:- use a higher number to reduce jitter 62febf1dffSMark Brown * 63febf1dffSMark Brown * The default values correspond to Mainstone II in QVGA mode 64febf1dffSMark Brown * 65febf1dffSMark Brown * Please read 665fb94e9cSMauro Carvalho Chehab * Documentation/input/input-programming.rst for more details. 67febf1dffSMark Brown */ 68febf1dffSMark Brown 69859abd1dSDmitry Eremin-Solenikov static int abs_x[3] = {150, 4000, 5}; 70febf1dffSMark Brown module_param_array(abs_x, int, NULL, 0); 71febf1dffSMark Brown MODULE_PARM_DESC(abs_x, "Touchscreen absolute X min, max, fuzz"); 72febf1dffSMark Brown 73859abd1dSDmitry Eremin-Solenikov static int abs_y[3] = {200, 4000, 40}; 74febf1dffSMark Brown module_param_array(abs_y, int, NULL, 0); 75febf1dffSMark Brown MODULE_PARM_DESC(abs_y, "Touchscreen absolute Y min, max, fuzz"); 76febf1dffSMark Brown 77febf1dffSMark Brown static int abs_p[3] = {0, 150, 4}; 78febf1dffSMark Brown module_param_array(abs_p, int, NULL, 0); 79febf1dffSMark Brown MODULE_PARM_DESC(abs_p, "Touchscreen absolute Pressure min, max, fuzz"); 80febf1dffSMark Brown 81febf1dffSMark Brown /* 82febf1dffSMark Brown * wm97xx IO access, all IO locking done by AC97 layer 83febf1dffSMark Brown */ 84febf1dffSMark Brown int wm97xx_reg_read(struct wm97xx *wm, u16 reg) 85febf1dffSMark Brown { 86febf1dffSMark Brown if (wm->ac97) 87febf1dffSMark Brown return wm->ac97->bus->ops->read(wm->ac97, reg); 88febf1dffSMark Brown else 89febf1dffSMark Brown return -1; 90febf1dffSMark Brown } 91febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_reg_read); 92febf1dffSMark Brown 93febf1dffSMark Brown void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val) 94febf1dffSMark Brown { 95febf1dffSMark Brown /* cache digitiser registers */ 96febf1dffSMark Brown if (reg >= AC97_WM9713_DIG1 && reg <= AC97_WM9713_DIG3) 97febf1dffSMark Brown wm->dig[(reg - AC97_WM9713_DIG1) >> 1] = val; 98febf1dffSMark Brown 99febf1dffSMark Brown /* cache gpio regs */ 100febf1dffSMark Brown if (reg >= AC97_GPIO_CFG && reg <= AC97_MISC_AFE) 101febf1dffSMark Brown wm->gpio[(reg - AC97_GPIO_CFG) >> 1] = val; 102febf1dffSMark Brown 103febf1dffSMark Brown /* wm9713 irq reg */ 104febf1dffSMark Brown if (reg == 0x5a) 105febf1dffSMark Brown wm->misc = val; 106febf1dffSMark Brown 107febf1dffSMark Brown if (wm->ac97) 108febf1dffSMark Brown wm->ac97->bus->ops->write(wm->ac97, reg, val); 109febf1dffSMark Brown } 110febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_reg_write); 111febf1dffSMark Brown 112febf1dffSMark Brown /** 113febf1dffSMark Brown * wm97xx_read_aux_adc - Read the aux adc. 114febf1dffSMark Brown * @wm: wm97xx device. 115febf1dffSMark Brown * @adcsel: codec ADC to be read 116febf1dffSMark Brown * 117febf1dffSMark Brown * Reads the selected AUX ADC. 118febf1dffSMark Brown */ 119febf1dffSMark Brown 120febf1dffSMark Brown int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel) 121febf1dffSMark Brown { 122febf1dffSMark Brown int power_adc = 0, auxval; 123febf1dffSMark Brown u16 power = 0; 124eb54ddd4SEric Millbrandt int rc = 0; 125eb54ddd4SEric Millbrandt int timeout = 0; 126febf1dffSMark Brown 127febf1dffSMark Brown /* get codec */ 128febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 129febf1dffSMark Brown 130febf1dffSMark Brown /* When the touchscreen is not in use, we may have to power up 131febf1dffSMark Brown * the AUX ADC before we can use sample the AUX inputs-> 132febf1dffSMark Brown */ 133febf1dffSMark Brown if (wm->id == WM9713_ID2 && 134febf1dffSMark Brown (power = wm97xx_reg_read(wm, AC97_EXTENDED_MID)) & 0x8000) { 135febf1dffSMark Brown power_adc = 1; 136febf1dffSMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, power & 0x7fff); 137febf1dffSMark Brown } 138febf1dffSMark Brown 139febf1dffSMark Brown /* Prepare the codec for AUX reading */ 140febf1dffSMark Brown wm->codec->aux_prepare(wm); 141febf1dffSMark Brown 142febf1dffSMark Brown /* Turn polling mode on to read AUX ADC */ 143febf1dffSMark Brown wm->pen_probably_down = 1; 144eb54ddd4SEric Millbrandt 145eb54ddd4SEric Millbrandt while (rc != RC_VALID && timeout++ < 5) 146eb54ddd4SEric Millbrandt rc = wm->codec->poll_sample(wm, adcsel, &auxval); 147febf1dffSMark Brown 148febf1dffSMark Brown if (power_adc) 149febf1dffSMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000); 150febf1dffSMark Brown 151febf1dffSMark Brown wm->codec->dig_restore(wm); 152febf1dffSMark Brown 153febf1dffSMark Brown wm->pen_probably_down = 0; 154febf1dffSMark Brown 155eb54ddd4SEric Millbrandt if (timeout >= 5) { 156eb54ddd4SEric Millbrandt dev_err(wm->dev, 157eb54ddd4SEric Millbrandt "timeout reading auxadc %d, disabling digitiser\n", 158eb54ddd4SEric Millbrandt adcsel); 159eb54ddd4SEric Millbrandt wm->codec->dig_enable(wm, false); 160eb54ddd4SEric Millbrandt } 161eb54ddd4SEric Millbrandt 162febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 163eb54ddd4SEric Millbrandt return (rc == RC_VALID ? auxval & 0xfff : -EBUSY); 164febf1dffSMark Brown } 165febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc); 166febf1dffSMark Brown 167febf1dffSMark Brown /** 168febf1dffSMark Brown * wm97xx_get_gpio - Get the status of a codec GPIO. 169febf1dffSMark Brown * @wm: wm97xx device. 170febf1dffSMark Brown * @gpio: gpio 171febf1dffSMark Brown * 172febf1dffSMark Brown * Get the status of a codec GPIO pin 173febf1dffSMark Brown */ 174febf1dffSMark Brown 175febf1dffSMark Brown enum wm97xx_gpio_status wm97xx_get_gpio(struct wm97xx *wm, u32 gpio) 176febf1dffSMark Brown { 177febf1dffSMark Brown u16 status; 178febf1dffSMark Brown enum wm97xx_gpio_status ret; 179febf1dffSMark Brown 180febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 181febf1dffSMark Brown status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 182febf1dffSMark Brown 183febf1dffSMark Brown if (status & gpio) 184febf1dffSMark Brown ret = WM97XX_GPIO_HIGH; 185febf1dffSMark Brown else 186febf1dffSMark Brown ret = WM97XX_GPIO_LOW; 187febf1dffSMark Brown 188febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 189febf1dffSMark Brown return ret; 190febf1dffSMark Brown } 191febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_get_gpio); 192febf1dffSMark Brown 193febf1dffSMark Brown /** 194febf1dffSMark Brown * wm97xx_set_gpio - Set the status of a codec GPIO. 195febf1dffSMark Brown * @wm: wm97xx device. 196febf1dffSMark Brown * @gpio: gpio 197b324009dSLee Jones * @status: status 198febf1dffSMark Brown * 199febf1dffSMark Brown * Set the status of a codec GPIO pin 200febf1dffSMark Brown */ 201febf1dffSMark Brown 202febf1dffSMark Brown void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio, 203febf1dffSMark Brown enum wm97xx_gpio_status status) 204febf1dffSMark Brown { 205febf1dffSMark Brown u16 reg; 206febf1dffSMark Brown 207febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 208febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 209febf1dffSMark Brown 210af8b01b0SManuel Lauss if (status == WM97XX_GPIO_HIGH) 211febf1dffSMark Brown reg |= gpio; 212febf1dffSMark Brown else 213febf1dffSMark Brown reg &= ~gpio; 214febf1dffSMark Brown 21599fde513SMarek Vasut if (wm->id == WM9712_ID2 && wm->variant != WM97xx_WM1613) 216febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg << 1); 217febf1dffSMark Brown else 218febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, reg); 219febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 220febf1dffSMark Brown } 221febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_set_gpio); 222febf1dffSMark Brown 223febf1dffSMark Brown /* 224febf1dffSMark Brown * Codec GPIO pin configuration, this sets pin direction, polarity, 225febf1dffSMark Brown * stickyness and wake up. 226febf1dffSMark Brown */ 227febf1dffSMark Brown void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio, enum wm97xx_gpio_dir dir, 228febf1dffSMark Brown enum wm97xx_gpio_pol pol, enum wm97xx_gpio_sticky sticky, 229febf1dffSMark Brown enum wm97xx_gpio_wake wake) 230febf1dffSMark Brown { 231febf1dffSMark Brown u16 reg; 232febf1dffSMark Brown 233febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 234febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); 235febf1dffSMark Brown 236febf1dffSMark Brown if (pol == WM97XX_GPIO_POL_HIGH) 237febf1dffSMark Brown reg |= gpio; 238febf1dffSMark Brown else 239febf1dffSMark Brown reg &= ~gpio; 240febf1dffSMark Brown 241febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, reg); 242febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_STICKY); 243febf1dffSMark Brown 244febf1dffSMark Brown if (sticky == WM97XX_GPIO_STICKY) 245febf1dffSMark Brown reg |= gpio; 246febf1dffSMark Brown else 247febf1dffSMark Brown reg &= ~gpio; 248febf1dffSMark Brown 249febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STICKY, reg); 250febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); 251febf1dffSMark Brown 252febf1dffSMark Brown if (wake == WM97XX_GPIO_WAKE) 253febf1dffSMark Brown reg |= gpio; 254febf1dffSMark Brown else 255febf1dffSMark Brown reg &= ~gpio; 256febf1dffSMark Brown 257febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, reg); 258febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_GPIO_CFG); 259febf1dffSMark Brown 260febf1dffSMark Brown if (dir == WM97XX_GPIO_IN) 261febf1dffSMark Brown reg |= gpio; 262febf1dffSMark Brown else 263febf1dffSMark Brown reg &= ~gpio; 264febf1dffSMark Brown 265febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_CFG, reg); 266febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 267febf1dffSMark Brown } 268febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_config_gpio); 269febf1dffSMark Brown 270febf1dffSMark Brown /* 27134d27853SMark Brown * Configure the WM97XX_PRP value to use while system is suspended. 27234d27853SMark Brown * If a value other than 0 is set then WM97xx pen detection will be 27334d27853SMark Brown * left enabled in the configured mode while the system is in suspend, 27434d27853SMark Brown * the device has users and suspend has not been disabled via the 27534d27853SMark Brown * wakeup sysfs entries. 27634d27853SMark Brown * 27734d27853SMark Brown * @wm: WM97xx device to configure 27834d27853SMark Brown * @mode: WM97XX_PRP value to configure while suspended 27934d27853SMark Brown */ 28034d27853SMark Brown void wm97xx_set_suspend_mode(struct wm97xx *wm, u16 mode) 28134d27853SMark Brown { 28234d27853SMark Brown wm->suspend_mode = mode; 28334d27853SMark Brown device_init_wakeup(&wm->input_dev->dev, mode != 0); 28434d27853SMark Brown } 28534d27853SMark Brown EXPORT_SYMBOL_GPL(wm97xx_set_suspend_mode); 28634d27853SMark Brown 28734d27853SMark Brown /* 288a2ef9261SDmitry Torokhov * Codec PENDOWN irq handler 289a2ef9261SDmitry Torokhov * 290febf1dffSMark Brown */ 291a2ef9261SDmitry Torokhov static irqreturn_t wm97xx_pen_interrupt(int irq, void *dev_id) 292febf1dffSMark Brown { 293a2ef9261SDmitry Torokhov struct wm97xx *wm = dev_id; 294febf1dffSMark Brown int pen_was_down = wm->pen_is_down; 295febf1dffSMark Brown 296febf1dffSMark Brown /* do we need to enable the touch panel reader */ 297febf1dffSMark Brown if (wm->id == WM9705_ID2) { 298febf1dffSMark Brown if (wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD) & 299febf1dffSMark Brown WM97XX_PEN_DOWN) 300febf1dffSMark Brown wm->pen_is_down = 1; 301febf1dffSMark Brown else 302febf1dffSMark Brown wm->pen_is_down = 0; 303febf1dffSMark Brown } else { 304febf1dffSMark Brown u16 status, pol; 305febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 306febf1dffSMark Brown status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 307febf1dffSMark Brown pol = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); 308febf1dffSMark Brown 309febf1dffSMark Brown if (WM97XX_GPIO_13 & pol & status) { 310febf1dffSMark Brown wm->pen_is_down = 1; 311febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol & 312febf1dffSMark Brown ~WM97XX_GPIO_13); 313febf1dffSMark Brown } else { 314febf1dffSMark Brown wm->pen_is_down = 0; 315febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol | 316febf1dffSMark Brown WM97XX_GPIO_13); 317febf1dffSMark Brown } 318febf1dffSMark Brown 31999fde513SMarek Vasut if (wm->id == WM9712_ID2 && wm->variant != WM97xx_WM1613) 320febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, (status & 321febf1dffSMark Brown ~WM97XX_GPIO_13) << 1); 322febf1dffSMark Brown else 323febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, status & 324febf1dffSMark Brown ~WM97XX_GPIO_13); 325febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 326febf1dffSMark Brown } 327febf1dffSMark Brown 328febf1dffSMark Brown /* If the system is not using continuous mode or it provides a 329febf1dffSMark Brown * pen down operation then we need to schedule polls while the 330febf1dffSMark Brown * pen is down. Otherwise the machine driver is responsible 331febf1dffSMark Brown * for scheduling reads. 332febf1dffSMark Brown */ 333febf1dffSMark Brown if (!wm->mach_ops->acc_enabled || wm->mach_ops->acc_pen_down) { 334febf1dffSMark Brown if (wm->pen_is_down && !pen_was_down) { 33525985edcSLucas De Marchi /* Data is not available immediately on pen down */ 336febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 1); 337febf1dffSMark Brown } 338febf1dffSMark Brown 339febf1dffSMark Brown /* Let ts_reader report the pen up for debounce. */ 340febf1dffSMark Brown if (!wm->pen_is_down && pen_was_down) 341febf1dffSMark Brown wm->pen_is_down = 1; 342febf1dffSMark Brown } 343febf1dffSMark Brown 344febf1dffSMark Brown if (!wm->pen_is_down && wm->mach_ops->acc_enabled) 345febf1dffSMark Brown wm->mach_ops->acc_pen_up(wm); 346febf1dffSMark Brown 347febf1dffSMark Brown return IRQ_HANDLED; 348febf1dffSMark Brown } 349febf1dffSMark Brown 350febf1dffSMark Brown /* 351febf1dffSMark Brown * initialise pen IRQ handler and workqueue 352febf1dffSMark Brown */ 353febf1dffSMark Brown static int wm97xx_init_pen_irq(struct wm97xx *wm) 354febf1dffSMark Brown { 355febf1dffSMark Brown u16 reg; 356febf1dffSMark Brown 357a2ef9261SDmitry Torokhov if (request_threaded_irq(wm->pen_irq, NULL, wm97xx_pen_interrupt, 358a2ef9261SDmitry Torokhov IRQF_SHARED | IRQF_ONESHOT, 359febf1dffSMark Brown "wm97xx-pen", wm)) { 360febf1dffSMark Brown dev_err(wm->dev, 361febf1dffSMark Brown "Failed to register pen down interrupt, polling"); 362febf1dffSMark Brown wm->pen_irq = 0; 363febf1dffSMark Brown return -EINVAL; 364febf1dffSMark Brown } 365febf1dffSMark Brown 366febf1dffSMark Brown /* Configure GPIO as interrupt source on WM971x */ 367febf1dffSMark Brown if (wm->id != WM9705_ID2) { 368febf1dffSMark Brown BUG_ON(!wm->mach_ops->irq_gpio); 369febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_MISC_AFE); 370febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, 371febf1dffSMark Brown reg & ~(wm->mach_ops->irq_gpio)); 372febf1dffSMark Brown reg = wm97xx_reg_read(wm, 0x5a); 373febf1dffSMark Brown wm97xx_reg_write(wm, 0x5a, reg & ~0x0001); 374febf1dffSMark Brown } 375febf1dffSMark Brown 376febf1dffSMark Brown return 0; 377febf1dffSMark Brown } 378febf1dffSMark Brown 379febf1dffSMark Brown static int wm97xx_read_samples(struct wm97xx *wm) 380febf1dffSMark Brown { 381febf1dffSMark Brown struct wm97xx_data data; 382febf1dffSMark Brown int rc; 383febf1dffSMark Brown 384febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 385febf1dffSMark Brown 386febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 387febf1dffSMark Brown rc = wm->mach_ops->acc_pen_down(wm); 388febf1dffSMark Brown else 389febf1dffSMark Brown rc = wm->codec->poll_touch(wm, &data); 390febf1dffSMark Brown 391febf1dffSMark Brown if (rc & RC_PENUP) { 392febf1dffSMark Brown if (wm->pen_is_down) { 393febf1dffSMark Brown wm->pen_is_down = 0; 394febf1dffSMark Brown dev_dbg(wm->dev, "pen up\n"); 395febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_PRESSURE, 0); 39665db86acSMike Rapoport input_report_key(wm->input_dev, BTN_TOUCH, 0); 397febf1dffSMark Brown input_sync(wm->input_dev); 398febf1dffSMark Brown } else if (!(rc & RC_AGAIN)) { 399febf1dffSMark Brown /* We need high frequency updates only while 400febf1dffSMark Brown * pen is down, the user never will be able to 401febf1dffSMark Brown * touch screen faster than a few times per 402febf1dffSMark Brown * second... On the other hand, when the user 403febf1dffSMark Brown * is actively working with the touchscreen we 404febf1dffSMark Brown * don't want to lose the quick response. So we 405febf1dffSMark Brown * will slowly increase sleep time after the 406febf1dffSMark Brown * pen is up and quicky restore it to ~one task 407febf1dffSMark Brown * switch when pen is down again. 408febf1dffSMark Brown */ 409febf1dffSMark Brown if (wm->ts_reader_interval < HZ / 10) 410febf1dffSMark Brown wm->ts_reader_interval++; 411febf1dffSMark Brown } 412febf1dffSMark Brown 413febf1dffSMark Brown } else if (rc & RC_VALID) { 414febf1dffSMark Brown dev_dbg(wm->dev, 415febf1dffSMark Brown "pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n", 416febf1dffSMark Brown data.x >> 12, data.x & 0xfff, data.y >> 12, 417febf1dffSMark Brown data.y & 0xfff, data.p >> 12, data.p & 0xfff); 418cfd5d096SMarkus Pargmann 419cfd5d096SMarkus Pargmann if (abs_x[0] > (data.x & 0xfff) || 420cfd5d096SMarkus Pargmann abs_x[1] < (data.x & 0xfff) || 421cfd5d096SMarkus Pargmann abs_y[0] > (data.y & 0xfff) || 422cfd5d096SMarkus Pargmann abs_y[1] < (data.y & 0xfff)) { 423cfd5d096SMarkus Pargmann dev_dbg(wm->dev, "Measurement out of range, dropping it\n"); 424cfd5d096SMarkus Pargmann rc = RC_AGAIN; 425cfd5d096SMarkus Pargmann goto out; 426cfd5d096SMarkus Pargmann } 427cfd5d096SMarkus Pargmann 428febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_X, data.x & 0xfff); 429febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_Y, data.y & 0xfff); 430febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_PRESSURE, data.p & 0xfff); 43165db86acSMike Rapoport input_report_key(wm->input_dev, BTN_TOUCH, 1); 432febf1dffSMark Brown input_sync(wm->input_dev); 433febf1dffSMark Brown wm->pen_is_down = 1; 434febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 435febf1dffSMark Brown } else if (rc & RC_PENDOWN) { 436febf1dffSMark Brown dev_dbg(wm->dev, "pen down\n"); 437febf1dffSMark Brown wm->pen_is_down = 1; 438febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 439febf1dffSMark Brown } 440febf1dffSMark Brown 441cfd5d096SMarkus Pargmann out: 442febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 443febf1dffSMark Brown return rc; 444febf1dffSMark Brown } 445febf1dffSMark Brown 446febf1dffSMark Brown /* 447febf1dffSMark Brown * The touchscreen sample reader. 448febf1dffSMark Brown */ 449febf1dffSMark Brown static void wm97xx_ts_reader(struct work_struct *work) 450febf1dffSMark Brown { 451febf1dffSMark Brown int rc; 452febf1dffSMark Brown struct wm97xx *wm = container_of(work, struct wm97xx, ts_reader.work); 453febf1dffSMark Brown 454febf1dffSMark Brown BUG_ON(!wm->codec); 455febf1dffSMark Brown 456febf1dffSMark Brown do { 457febf1dffSMark Brown rc = wm97xx_read_samples(wm); 458febf1dffSMark Brown } while (rc & RC_AGAIN); 459febf1dffSMark Brown 460febf1dffSMark Brown if (wm->pen_is_down || !wm->pen_irq) 461febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 462febf1dffSMark Brown wm->ts_reader_interval); 463febf1dffSMark Brown } 464febf1dffSMark Brown 465febf1dffSMark Brown /** 466febf1dffSMark Brown * wm97xx_ts_input_open - Open the touch screen input device. 467febf1dffSMark Brown * @idev: Input device to be opened. 468febf1dffSMark Brown * 469febf1dffSMark Brown * Called by the input sub system to open a wm97xx touchscreen device. 470febf1dffSMark Brown * Starts the touchscreen thread and touch digitiser. 471febf1dffSMark Brown */ 472febf1dffSMark Brown static int wm97xx_ts_input_open(struct input_dev *idev) 473febf1dffSMark Brown { 474febf1dffSMark Brown struct wm97xx *wm = input_get_drvdata(idev); 475febf1dffSMark Brown 476c9a3a7cfSBhaktipriya Shridhar wm->ts_workq = alloc_ordered_workqueue("kwm97xx", 0); 477febf1dffSMark Brown if (wm->ts_workq == NULL) { 478febf1dffSMark Brown dev_err(wm->dev, 479febf1dffSMark Brown "Failed to create workqueue\n"); 480febf1dffSMark Brown return -EINVAL; 481febf1dffSMark Brown } 482febf1dffSMark Brown 483febf1dffSMark Brown /* start digitiser */ 484febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 485febf1dffSMark Brown wm->codec->acc_enable(wm, 1); 486febf1dffSMark Brown wm->codec->dig_enable(wm, 1); 487febf1dffSMark Brown 488febf1dffSMark Brown INIT_DELAYED_WORK(&wm->ts_reader, wm97xx_ts_reader); 489febf1dffSMark Brown 490febf1dffSMark Brown wm->ts_reader_min_interval = HZ >= 100 ? HZ / 100 : 1; 491febf1dffSMark Brown if (wm->ts_reader_min_interval < 1) 492febf1dffSMark Brown wm->ts_reader_min_interval = 1; 493febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 494febf1dffSMark Brown 495febf1dffSMark Brown wm->pen_is_down = 0; 496febf1dffSMark Brown if (wm->pen_irq) 497febf1dffSMark Brown wm97xx_init_pen_irq(wm); 498febf1dffSMark Brown else 499febf1dffSMark Brown dev_err(wm->dev, "No IRQ specified\n"); 500febf1dffSMark Brown 501febf1dffSMark Brown /* If we either don't have an interrupt for pen down events or 502febf1dffSMark Brown * failed to acquire it then we need to poll. 503febf1dffSMark Brown */ 504febf1dffSMark Brown if (wm->pen_irq == 0) 505febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 506febf1dffSMark Brown wm->ts_reader_interval); 507febf1dffSMark Brown 508febf1dffSMark Brown return 0; 509febf1dffSMark Brown } 510febf1dffSMark Brown 511febf1dffSMark Brown /** 512febf1dffSMark Brown * wm97xx_ts_input_close - Close the touch screen input device. 513febf1dffSMark Brown * @idev: Input device to be closed. 514febf1dffSMark Brown * 515febf1dffSMark Brown * Called by the input sub system to close a wm97xx touchscreen 516febf1dffSMark Brown * device. Kills the touchscreen thread and stops the touch 517febf1dffSMark Brown * digitiser. 518febf1dffSMark Brown */ 519febf1dffSMark Brown 520febf1dffSMark Brown static void wm97xx_ts_input_close(struct input_dev *idev) 521febf1dffSMark Brown { 522febf1dffSMark Brown struct wm97xx *wm = input_get_drvdata(idev); 523febf1dffSMark Brown u16 reg; 524febf1dffSMark Brown 525febf1dffSMark Brown if (wm->pen_irq) { 526febf1dffSMark Brown /* Return the interrupt to GPIO usage (disabling it) */ 527febf1dffSMark Brown if (wm->id != WM9705_ID2) { 528febf1dffSMark Brown BUG_ON(!wm->mach_ops->irq_gpio); 529febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_MISC_AFE); 530febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, 531febf1dffSMark Brown reg | wm->mach_ops->irq_gpio); 532febf1dffSMark Brown } 533febf1dffSMark Brown 534febf1dffSMark Brown free_irq(wm->pen_irq, wm); 535febf1dffSMark Brown } 536febf1dffSMark Brown 537febf1dffSMark Brown wm->pen_is_down = 0; 538febf1dffSMark Brown 539febf1dffSMark Brown /* ts_reader rearms itself so we need to explicitly stop it 540febf1dffSMark Brown * before we destroy the workqueue. 541febf1dffSMark Brown */ 542febf1dffSMark Brown cancel_delayed_work_sync(&wm->ts_reader); 543febf1dffSMark Brown 544febf1dffSMark Brown destroy_workqueue(wm->ts_workq); 545febf1dffSMark Brown 546febf1dffSMark Brown /* stop digitiser */ 547febf1dffSMark Brown wm->codec->dig_enable(wm, 0); 548febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 549febf1dffSMark Brown wm->codec->acc_enable(wm, 0); 550febf1dffSMark Brown } 551febf1dffSMark Brown 552c72f61e7SRobert Jarzmik static int wm97xx_register_touch(struct wm97xx *wm) 553febf1dffSMark Brown { 554c72f61e7SRobert Jarzmik struct wm97xx_pdata *pdata = dev_get_platdata(wm->dev); 555c72f61e7SRobert Jarzmik int ret; 556febf1dffSMark Brown 557c72f61e7SRobert Jarzmik wm->input_dev = devm_input_allocate_device(wm->dev); 558c72f61e7SRobert Jarzmik if (wm->input_dev == NULL) 559febf1dffSMark Brown return -ENOMEM; 560febf1dffSMark Brown 561c72f61e7SRobert Jarzmik /* set up touch configuration */ 562c72f61e7SRobert Jarzmik wm->input_dev->name = "wm97xx touchscreen"; 563c72f61e7SRobert Jarzmik wm->input_dev->phys = "wm97xx"; 564c72f61e7SRobert Jarzmik wm->input_dev->open = wm97xx_ts_input_open; 565c72f61e7SRobert Jarzmik wm->input_dev->close = wm97xx_ts_input_close; 566c72f61e7SRobert Jarzmik 567c72f61e7SRobert Jarzmik __set_bit(EV_ABS, wm->input_dev->evbit); 568c72f61e7SRobert Jarzmik __set_bit(EV_KEY, wm->input_dev->evbit); 569c72f61e7SRobert Jarzmik __set_bit(BTN_TOUCH, wm->input_dev->keybit); 570c72f61e7SRobert Jarzmik 571c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_X, abs_x[0], abs_x[1], 572c72f61e7SRobert Jarzmik abs_x[2], 0); 573c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_Y, abs_y[0], abs_y[1], 574c72f61e7SRobert Jarzmik abs_y[2], 0); 575c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_PRESSURE, abs_p[0], abs_p[1], 576c72f61e7SRobert Jarzmik abs_p[2], 0); 577c72f61e7SRobert Jarzmik 578c72f61e7SRobert Jarzmik input_set_drvdata(wm->input_dev, wm); 579c72f61e7SRobert Jarzmik wm->input_dev->dev.parent = wm->dev; 580c72f61e7SRobert Jarzmik 581c72f61e7SRobert Jarzmik ret = input_register_device(wm->input_dev); 582c72f61e7SRobert Jarzmik if (ret) 583c72f61e7SRobert Jarzmik return ret; 584c72f61e7SRobert Jarzmik 585c72f61e7SRobert Jarzmik /* 586c72f61e7SRobert Jarzmik * register our extended touch device (for machine specific 587c72f61e7SRobert Jarzmik * extensions) 588c72f61e7SRobert Jarzmik */ 589c72f61e7SRobert Jarzmik wm->touch_dev = platform_device_alloc("wm97xx-touch", -1); 590a4f399a1SChristophe JAILLET if (!wm->touch_dev) 591a4f399a1SChristophe JAILLET return -ENOMEM; 592a4f399a1SChristophe JAILLET 593c72f61e7SRobert Jarzmik platform_set_drvdata(wm->touch_dev, wm); 594c72f61e7SRobert Jarzmik wm->touch_dev->dev.parent = wm->dev; 595c72f61e7SRobert Jarzmik wm->touch_dev->dev.platform_data = pdata; 596c72f61e7SRobert Jarzmik ret = platform_device_add(wm->touch_dev); 597c72f61e7SRobert Jarzmik if (ret < 0) 598c72f61e7SRobert Jarzmik goto touch_reg_err; 599c72f61e7SRobert Jarzmik 600c72f61e7SRobert Jarzmik return 0; 601c72f61e7SRobert Jarzmik touch_reg_err: 602c72f61e7SRobert Jarzmik platform_device_put(wm->touch_dev); 603c72f61e7SRobert Jarzmik 604c72f61e7SRobert Jarzmik return ret; 605c72f61e7SRobert Jarzmik } 606c72f61e7SRobert Jarzmik 607c72f61e7SRobert Jarzmik static void wm97xx_unregister_touch(struct wm97xx *wm) 608c72f61e7SRobert Jarzmik { 609c72f61e7SRobert Jarzmik platform_device_unregister(wm->touch_dev); 610c72f61e7SRobert Jarzmik } 611c72f61e7SRobert Jarzmik 612c72f61e7SRobert Jarzmik static int _wm97xx_probe(struct wm97xx *wm) 613c72f61e7SRobert Jarzmik { 614c72f61e7SRobert Jarzmik int id = 0; 615c72f61e7SRobert Jarzmik 616c72f61e7SRobert Jarzmik mutex_init(&wm->codec_mutex); 617c72f61e7SRobert Jarzmik dev_set_drvdata(wm->dev, wm); 618febf1dffSMark Brown 619febf1dffSMark Brown /* check that we have a supported codec */ 620febf1dffSMark Brown id = wm97xx_reg_read(wm, AC97_VENDOR_ID1); 621febf1dffSMark Brown if (id != WM97XX_ID1) { 622c72f61e7SRobert Jarzmik dev_err(wm->dev, 623c72f61e7SRobert Jarzmik "Device with vendor %04x is not a wm97xx\n", id); 624c72f61e7SRobert Jarzmik return -ENODEV; 625febf1dffSMark Brown } 626febf1dffSMark Brown 627febf1dffSMark Brown wm->id = wm97xx_reg_read(wm, AC97_VENDOR_ID2); 628febf1dffSMark Brown 62999fde513SMarek Vasut wm->variant = WM97xx_GENERIC; 63099fde513SMarek Vasut 631febf1dffSMark Brown dev_info(wm->dev, "detected a wm97%02x codec\n", wm->id & 0xff); 632febf1dffSMark Brown 633febf1dffSMark Brown switch (wm->id & 0xff) { 634febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9705 635febf1dffSMark Brown case 0x05: 636febf1dffSMark Brown wm->codec = &wm9705_codec; 637febf1dffSMark Brown break; 638febf1dffSMark Brown #endif 639febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9712 640febf1dffSMark Brown case 0x12: 641febf1dffSMark Brown wm->codec = &wm9712_codec; 642febf1dffSMark Brown break; 643febf1dffSMark Brown #endif 644febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9713 645febf1dffSMark Brown case 0x13: 646febf1dffSMark Brown wm->codec = &wm9713_codec; 647febf1dffSMark Brown break; 648febf1dffSMark Brown #endif 649febf1dffSMark Brown default: 650febf1dffSMark Brown dev_err(wm->dev, "Support for wm97%02x not compiled in.\n", 651febf1dffSMark Brown wm->id & 0xff); 652c72f61e7SRobert Jarzmik return -ENODEV; 653febf1dffSMark Brown } 654febf1dffSMark Brown 6555de4cd43SMark Brown /* set up physical characteristics */ 6565de4cd43SMark Brown wm->codec->phy_init(wm); 6575de4cd43SMark Brown 6585de4cd43SMark Brown /* load gpio cache */ 6595de4cd43SMark Brown wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG); 6605de4cd43SMark Brown wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); 6615de4cd43SMark Brown wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY); 6625de4cd43SMark Brown wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); 6635de4cd43SMark Brown wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 6645de4cd43SMark Brown wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE); 6655de4cd43SMark Brown 666c72f61e7SRobert Jarzmik return wm97xx_register_touch(wm); 667febf1dffSMark Brown } 668febf1dffSMark Brown 669c72f61e7SRobert Jarzmik static void wm97xx_remove_battery(struct wm97xx *wm) 670c72f61e7SRobert Jarzmik { 671c72f61e7SRobert Jarzmik platform_device_unregister(wm->battery_dev); 672c72f61e7SRobert Jarzmik } 67365db86acSMike Rapoport 674c72f61e7SRobert Jarzmik static int wm97xx_add_battery(struct wm97xx *wm, 675c72f61e7SRobert Jarzmik struct wm97xx_batt_pdata *pdata) 676c72f61e7SRobert Jarzmik { 677c72f61e7SRobert Jarzmik int ret; 67865db86acSMike Rapoport 679febf1dffSMark Brown wm->battery_dev = platform_device_alloc("wm97xx-battery", -1); 680c72f61e7SRobert Jarzmik if (!wm->battery_dev) 681c72f61e7SRobert Jarzmik return -ENOMEM; 682febf1dffSMark Brown 683c72f61e7SRobert Jarzmik platform_set_drvdata(wm->battery_dev, wm); 684c72f61e7SRobert Jarzmik wm->battery_dev->dev.parent = wm->dev; 685c72f61e7SRobert Jarzmik wm->battery_dev->dev.platform_data = pdata; 686c72f61e7SRobert Jarzmik ret = platform_device_add(wm->battery_dev); 687c72f61e7SRobert Jarzmik if (ret) 688c72f61e7SRobert Jarzmik platform_device_put(wm->battery_dev); 689c72f61e7SRobert Jarzmik 690c72f61e7SRobert Jarzmik return ret; 691febf1dffSMark Brown } 692c72f61e7SRobert Jarzmik 693c72f61e7SRobert Jarzmik static int wm97xx_probe(struct device *dev) 694c72f61e7SRobert Jarzmik { 695c72f61e7SRobert Jarzmik struct wm97xx *wm; 696c72f61e7SRobert Jarzmik int ret; 697c72f61e7SRobert Jarzmik struct wm97xx_pdata *pdata = dev_get_platdata(dev); 698c72f61e7SRobert Jarzmik 699c72f61e7SRobert Jarzmik wm = devm_kzalloc(dev, sizeof(struct wm97xx), GFP_KERNEL); 700c72f61e7SRobert Jarzmik if (!wm) 701c72f61e7SRobert Jarzmik return -ENOMEM; 702c72f61e7SRobert Jarzmik 703c72f61e7SRobert Jarzmik wm->dev = dev; 704c72f61e7SRobert Jarzmik wm->ac97 = to_ac97_t(dev); 705c72f61e7SRobert Jarzmik 706c72f61e7SRobert Jarzmik ret = _wm97xx_probe(wm); 707c72f61e7SRobert Jarzmik if (ret) 708c72f61e7SRobert Jarzmik return ret; 709c72f61e7SRobert Jarzmik 710c72f61e7SRobert Jarzmik ret = wm97xx_add_battery(wm, pdata ? pdata->batt_pdata : NULL); 711febf1dffSMark Brown if (ret < 0) 712c72f61e7SRobert Jarzmik goto batt_err; 713febf1dffSMark Brown 714febf1dffSMark Brown return ret; 715febf1dffSMark Brown 716febf1dffSMark Brown batt_err: 717c72f61e7SRobert Jarzmik wm97xx_unregister_touch(wm); 718febf1dffSMark Brown return ret; 719febf1dffSMark Brown } 720febf1dffSMark Brown 721febf1dffSMark Brown static int wm97xx_remove(struct device *dev) 722febf1dffSMark Brown { 723febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 724febf1dffSMark Brown 725c72f61e7SRobert Jarzmik wm97xx_remove_battery(wm); 726c72f61e7SRobert Jarzmik wm97xx_unregister_touch(wm); 727febf1dffSMark Brown 728febf1dffSMark Brown return 0; 729febf1dffSMark Brown } 730febf1dffSMark Brown 731ae9d1b5fSRobert Jarzmik static int wm97xx_mfd_probe(struct platform_device *pdev) 732ae9d1b5fSRobert Jarzmik { 733ae9d1b5fSRobert Jarzmik struct wm97xx *wm; 734ae9d1b5fSRobert Jarzmik struct wm97xx_platform_data *mfd_pdata = dev_get_platdata(&pdev->dev); 735ae9d1b5fSRobert Jarzmik int ret; 736ae9d1b5fSRobert Jarzmik 737ae9d1b5fSRobert Jarzmik wm = devm_kzalloc(&pdev->dev, sizeof(struct wm97xx), GFP_KERNEL); 738ae9d1b5fSRobert Jarzmik if (!wm) 739ae9d1b5fSRobert Jarzmik return -ENOMEM; 740ae9d1b5fSRobert Jarzmik 741ae9d1b5fSRobert Jarzmik wm->dev = &pdev->dev; 742ae9d1b5fSRobert Jarzmik wm->ac97 = mfd_pdata->ac97; 743ae9d1b5fSRobert Jarzmik 744ae9d1b5fSRobert Jarzmik ret = _wm97xx_probe(wm); 745ae9d1b5fSRobert Jarzmik if (ret) 746ae9d1b5fSRobert Jarzmik return ret; 747ae9d1b5fSRobert Jarzmik 748ae9d1b5fSRobert Jarzmik ret = wm97xx_add_battery(wm, mfd_pdata->batt_pdata); 749ae9d1b5fSRobert Jarzmik if (ret < 0) 750ae9d1b5fSRobert Jarzmik goto batt_err; 751ae9d1b5fSRobert Jarzmik 752ae9d1b5fSRobert Jarzmik return ret; 753ae9d1b5fSRobert Jarzmik 754ae9d1b5fSRobert Jarzmik batt_err: 755ae9d1b5fSRobert Jarzmik wm97xx_unregister_touch(wm); 756ae9d1b5fSRobert Jarzmik return ret; 757ae9d1b5fSRobert Jarzmik } 758ae9d1b5fSRobert Jarzmik 759*c50fdc48SUwe Kleine-König static void wm97xx_mfd_remove(struct platform_device *pdev) 760ae9d1b5fSRobert Jarzmik { 76112dc6adcSUwe Kleine-König wm97xx_remove(&pdev->dev); 762ae9d1b5fSRobert Jarzmik } 763ae9d1b5fSRobert Jarzmik 764fea26099SJonathan Cameron static int wm97xx_suspend(struct device *dev) 765febf1dffSMark Brown { 766febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 76734d27853SMark Brown u16 reg; 76834d27853SMark Brown int suspend_mode; 76934d27853SMark Brown 77034d27853SMark Brown if (device_may_wakeup(&wm->input_dev->dev)) 77134d27853SMark Brown suspend_mode = wm->suspend_mode; 77234d27853SMark Brown else 77334d27853SMark Brown suspend_mode = 0; 774febf1dffSMark Brown 775d69f0a43SAndrzej Pietrasiewicz mutex_lock(&wm->input_dev->mutex); 776d69f0a43SAndrzej Pietrasiewicz if (input_device_enabled(wm->input_dev)) 777febf1dffSMark Brown cancel_delayed_work_sync(&wm->ts_reader); 778febf1dffSMark Brown 77934d27853SMark Brown /* Power down the digitiser (bypassing the cache for resume) */ 78034d27853SMark Brown reg = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER2); 78134d27853SMark Brown reg &= ~WM97XX_PRP_DET_DIG; 782d69f0a43SAndrzej Pietrasiewicz if (input_device_enabled(wm->input_dev)) 78334d27853SMark Brown reg |= suspend_mode; 78434d27853SMark Brown wm->ac97->bus->ops->write(wm->ac97, AC97_WM97XX_DIGITISER2, reg); 78534d27853SMark Brown 78634d27853SMark Brown /* WM9713 has an additional power bit - turn it off if there 78734d27853SMark Brown * are no users or if suspend mode is zero. */ 78834d27853SMark Brown if (wm->id == WM9713_ID2 && 789d69f0a43SAndrzej Pietrasiewicz (!input_device_enabled(wm->input_dev) || !suspend_mode)) { 79034d27853SMark Brown reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) | 0x8000; 79134d27853SMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); 79234d27853SMark Brown } 793d69f0a43SAndrzej Pietrasiewicz mutex_unlock(&wm->input_dev->mutex); 79434d27853SMark Brown 795febf1dffSMark Brown return 0; 796febf1dffSMark Brown } 797febf1dffSMark Brown 798fea26099SJonathan Cameron static int wm97xx_resume(struct device *dev) 799febf1dffSMark Brown { 800febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 801febf1dffSMark Brown 802d69f0a43SAndrzej Pietrasiewicz mutex_lock(&wm->input_dev->mutex); 803febf1dffSMark Brown /* restore digitiser and gpios */ 804febf1dffSMark Brown if (wm->id == WM9713_ID2) { 805febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig[0]); 806febf1dffSMark Brown wm97xx_reg_write(wm, 0x5a, wm->misc); 807d69f0a43SAndrzej Pietrasiewicz if (input_device_enabled(wm->input_dev)) { 808febf1dffSMark Brown u16 reg; 809febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) & 0x7fff; 810febf1dffSMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); 811febf1dffSMark Brown } 812febf1dffSMark Brown } 813febf1dffSMark Brown 814febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig[1]); 815febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2]); 816febf1dffSMark Brown 817febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_CFG, wm->gpio[0]); 818febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, wm->gpio[1]); 819febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STICKY, wm->gpio[2]); 820febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, wm->gpio[3]); 821febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, wm->gpio[4]); 822febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, wm->gpio[5]); 823febf1dffSMark Brown 824d69f0a43SAndrzej Pietrasiewicz if (input_device_enabled(wm->input_dev) && !wm->pen_irq) { 825febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 826febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 827febf1dffSMark Brown wm->ts_reader_interval); 828febf1dffSMark Brown } 829d69f0a43SAndrzej Pietrasiewicz mutex_unlock(&wm->input_dev->mutex); 830febf1dffSMark Brown 831febf1dffSMark Brown return 0; 832febf1dffSMark Brown } 833febf1dffSMark Brown 834fea26099SJonathan Cameron static DEFINE_SIMPLE_DEV_PM_OPS(wm97xx_pm_ops, wm97xx_suspend, wm97xx_resume); 835febf1dffSMark Brown 836febf1dffSMark Brown /* 837febf1dffSMark Brown * Machine specific operations 838febf1dffSMark Brown */ 839febf1dffSMark Brown int wm97xx_register_mach_ops(struct wm97xx *wm, 840febf1dffSMark Brown struct wm97xx_mach_ops *mach_ops) 841febf1dffSMark Brown { 842febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 843febf1dffSMark Brown if (wm->mach_ops) { 844febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 845febf1dffSMark Brown return -EINVAL; 846febf1dffSMark Brown } 847febf1dffSMark Brown wm->mach_ops = mach_ops; 848febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 849febf1dffSMark Brown 850febf1dffSMark Brown return 0; 851febf1dffSMark Brown } 852febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_register_mach_ops); 853febf1dffSMark Brown 854febf1dffSMark Brown void wm97xx_unregister_mach_ops(struct wm97xx *wm) 855febf1dffSMark Brown { 856febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 857febf1dffSMark Brown wm->mach_ops = NULL; 858febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 859febf1dffSMark Brown } 860febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_unregister_mach_ops); 861febf1dffSMark Brown 862febf1dffSMark Brown static struct device_driver wm97xx_driver = { 863ef9db492SMark Brown .name = "wm97xx-ts", 864ae9d1b5fSRobert Jarzmik #ifdef CONFIG_AC97_BUS 865febf1dffSMark Brown .bus = &ac97_bus_type, 866ae9d1b5fSRobert Jarzmik #endif 867febf1dffSMark Brown .owner = THIS_MODULE, 868febf1dffSMark Brown .probe = wm97xx_probe, 869febf1dffSMark Brown .remove = wm97xx_remove, 870fea26099SJonathan Cameron .pm = pm_sleep_ptr(&wm97xx_pm_ops), 871febf1dffSMark Brown }; 872febf1dffSMark Brown 873ae9d1b5fSRobert Jarzmik static struct platform_driver wm97xx_mfd_driver = { 874ae9d1b5fSRobert Jarzmik .driver = { 875ae9d1b5fSRobert Jarzmik .name = "wm97xx-ts", 876fea26099SJonathan Cameron .pm = pm_sleep_ptr(&wm97xx_pm_ops), 877ae9d1b5fSRobert Jarzmik }, 878ae9d1b5fSRobert Jarzmik .probe = wm97xx_mfd_probe, 879*c50fdc48SUwe Kleine-König .remove_new = wm97xx_mfd_remove, 880ae9d1b5fSRobert Jarzmik }; 881ae9d1b5fSRobert Jarzmik 882febf1dffSMark Brown static int __init wm97xx_init(void) 883febf1dffSMark Brown { 884ae9d1b5fSRobert Jarzmik int ret; 885ae9d1b5fSRobert Jarzmik 886ae9d1b5fSRobert Jarzmik ret = platform_driver_register(&wm97xx_mfd_driver); 887ae9d1b5fSRobert Jarzmik if (ret) 888ae9d1b5fSRobert Jarzmik return ret; 889ae9d1b5fSRobert Jarzmik 890ae9d1b5fSRobert Jarzmik if (IS_BUILTIN(CONFIG_AC97_BUS)) 891ae9d1b5fSRobert Jarzmik ret = driver_register(&wm97xx_driver); 892ae9d1b5fSRobert Jarzmik return ret; 893febf1dffSMark Brown } 894febf1dffSMark Brown 895febf1dffSMark Brown static void __exit wm97xx_exit(void) 896febf1dffSMark Brown { 897a3f7c3fcSRandy Dunlap if (IS_BUILTIN(CONFIG_AC97_BUS)) 898febf1dffSMark Brown driver_unregister(&wm97xx_driver); 899ae9d1b5fSRobert Jarzmik platform_driver_unregister(&wm97xx_mfd_driver); 900febf1dffSMark Brown } 901febf1dffSMark Brown 902febf1dffSMark Brown module_init(wm97xx_init); 903febf1dffSMark Brown module_exit(wm97xx_exit); 904febf1dffSMark Brown 905febf1dffSMark Brown /* Module information */ 906b8d055a8SLiam Girdwood MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>"); 907febf1dffSMark Brown MODULE_DESCRIPTION("WM97xx Core - Touch Screen / AUX ADC / GPIO Driver"); 908febf1dffSMark Brown MODULE_LICENSE("GPL"); 909