1*2874c5fdSThomas 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 197febf1dffSMark Brown * 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 /* 288febf1dffSMark Brown * Handle a pen down interrupt. 289febf1dffSMark Brown */ 290febf1dffSMark Brown static void wm97xx_pen_irq_worker(struct work_struct *work) 291febf1dffSMark Brown { 292febf1dffSMark Brown struct wm97xx *wm = container_of(work, struct wm97xx, pen_event_work); 293febf1dffSMark Brown int pen_was_down = wm->pen_is_down; 294febf1dffSMark Brown 295febf1dffSMark Brown /* do we need to enable the touch panel reader */ 296febf1dffSMark Brown if (wm->id == WM9705_ID2) { 297febf1dffSMark Brown if (wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD) & 298febf1dffSMark Brown WM97XX_PEN_DOWN) 299febf1dffSMark Brown wm->pen_is_down = 1; 300febf1dffSMark Brown else 301febf1dffSMark Brown wm->pen_is_down = 0; 302febf1dffSMark Brown } else { 303febf1dffSMark Brown u16 status, pol; 304febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 305febf1dffSMark Brown status = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 306febf1dffSMark Brown pol = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); 307febf1dffSMark Brown 308febf1dffSMark Brown if (WM97XX_GPIO_13 & pol & status) { 309febf1dffSMark Brown wm->pen_is_down = 1; 310febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol & 311febf1dffSMark Brown ~WM97XX_GPIO_13); 312febf1dffSMark Brown } else { 313febf1dffSMark Brown wm->pen_is_down = 0; 314febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, pol | 315febf1dffSMark Brown WM97XX_GPIO_13); 316febf1dffSMark Brown } 317febf1dffSMark Brown 31899fde513SMarek Vasut if (wm->id == WM9712_ID2 && wm->variant != WM97xx_WM1613) 319febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, (status & 320febf1dffSMark Brown ~WM97XX_GPIO_13) << 1); 321febf1dffSMark Brown else 322febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, status & 323febf1dffSMark Brown ~WM97XX_GPIO_13); 324febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 325febf1dffSMark Brown } 326febf1dffSMark Brown 327febf1dffSMark Brown /* If the system is not using continuous mode or it provides a 328febf1dffSMark Brown * pen down operation then we need to schedule polls while the 329febf1dffSMark Brown * pen is down. Otherwise the machine driver is responsible 330febf1dffSMark Brown * for scheduling reads. 331febf1dffSMark Brown */ 332febf1dffSMark Brown if (!wm->mach_ops->acc_enabled || wm->mach_ops->acc_pen_down) { 333febf1dffSMark Brown if (wm->pen_is_down && !pen_was_down) { 33425985edcSLucas De Marchi /* Data is not available immediately on pen down */ 335febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 1); 336febf1dffSMark Brown } 337febf1dffSMark Brown 338febf1dffSMark Brown /* Let ts_reader report the pen up for debounce. */ 339febf1dffSMark Brown if (!wm->pen_is_down && pen_was_down) 340febf1dffSMark Brown wm->pen_is_down = 1; 341febf1dffSMark Brown } 342febf1dffSMark Brown 343febf1dffSMark Brown if (!wm->pen_is_down && wm->mach_ops->acc_enabled) 344febf1dffSMark Brown wm->mach_ops->acc_pen_up(wm); 345febf1dffSMark Brown 346febf1dffSMark Brown wm->mach_ops->irq_enable(wm, 1); 347febf1dffSMark Brown } 348febf1dffSMark Brown 349febf1dffSMark Brown /* 350febf1dffSMark Brown * Codec PENDOWN irq handler 351febf1dffSMark Brown * 352febf1dffSMark Brown * We have to disable the codec interrupt in the handler because it 353febf1dffSMark Brown * can take up to 1ms to clear the interrupt source. We schedule a task 354d808fbe5SMark Brown * in a work queue to do the actual interaction with the chip. The 355d808fbe5SMark Brown * interrupt is then enabled again in the slow handler when the source 356d808fbe5SMark Brown * has been cleared. 357febf1dffSMark Brown */ 358febf1dffSMark Brown static irqreturn_t wm97xx_pen_interrupt(int irq, void *dev_id) 359febf1dffSMark Brown { 360febf1dffSMark Brown struct wm97xx *wm = dev_id; 361febf1dffSMark Brown 362d808fbe5SMark Brown if (!work_pending(&wm->pen_event_work)) { 363febf1dffSMark Brown wm->mach_ops->irq_enable(wm, 0); 364febf1dffSMark Brown queue_work(wm->ts_workq, &wm->pen_event_work); 365d808fbe5SMark Brown } 366febf1dffSMark Brown 367febf1dffSMark Brown return IRQ_HANDLED; 368febf1dffSMark Brown } 369febf1dffSMark Brown 370febf1dffSMark Brown /* 371febf1dffSMark Brown * initialise pen IRQ handler and workqueue 372febf1dffSMark Brown */ 373febf1dffSMark Brown static int wm97xx_init_pen_irq(struct wm97xx *wm) 374febf1dffSMark Brown { 375febf1dffSMark Brown u16 reg; 376febf1dffSMark Brown 377febf1dffSMark Brown /* If an interrupt is supplied an IRQ enable operation must also be 378febf1dffSMark Brown * provided. */ 379febf1dffSMark Brown BUG_ON(!wm->mach_ops->irq_enable); 380febf1dffSMark Brown 3814f295232SMark Brown if (request_irq(wm->pen_irq, wm97xx_pen_interrupt, IRQF_SHARED, 382febf1dffSMark Brown "wm97xx-pen", wm)) { 383febf1dffSMark Brown dev_err(wm->dev, 384febf1dffSMark Brown "Failed to register pen down interrupt, polling"); 385febf1dffSMark Brown wm->pen_irq = 0; 386febf1dffSMark Brown return -EINVAL; 387febf1dffSMark Brown } 388febf1dffSMark Brown 389febf1dffSMark Brown /* Configure GPIO as interrupt source on WM971x */ 390febf1dffSMark Brown if (wm->id != WM9705_ID2) { 391febf1dffSMark Brown BUG_ON(!wm->mach_ops->irq_gpio); 392febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_MISC_AFE); 393febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, 394febf1dffSMark Brown reg & ~(wm->mach_ops->irq_gpio)); 395febf1dffSMark Brown reg = wm97xx_reg_read(wm, 0x5a); 396febf1dffSMark Brown wm97xx_reg_write(wm, 0x5a, reg & ~0x0001); 397febf1dffSMark Brown } 398febf1dffSMark Brown 399febf1dffSMark Brown return 0; 400febf1dffSMark Brown } 401febf1dffSMark Brown 402febf1dffSMark Brown static int wm97xx_read_samples(struct wm97xx *wm) 403febf1dffSMark Brown { 404febf1dffSMark Brown struct wm97xx_data data; 405febf1dffSMark Brown int rc; 406febf1dffSMark Brown 407febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 408febf1dffSMark Brown 409febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 410febf1dffSMark Brown rc = wm->mach_ops->acc_pen_down(wm); 411febf1dffSMark Brown else 412febf1dffSMark Brown rc = wm->codec->poll_touch(wm, &data); 413febf1dffSMark Brown 414febf1dffSMark Brown if (rc & RC_PENUP) { 415febf1dffSMark Brown if (wm->pen_is_down) { 416febf1dffSMark Brown wm->pen_is_down = 0; 417febf1dffSMark Brown dev_dbg(wm->dev, "pen up\n"); 418febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_PRESSURE, 0); 41965db86acSMike Rapoport input_report_key(wm->input_dev, BTN_TOUCH, 0); 420febf1dffSMark Brown input_sync(wm->input_dev); 421febf1dffSMark Brown } else if (!(rc & RC_AGAIN)) { 422febf1dffSMark Brown /* We need high frequency updates only while 423febf1dffSMark Brown * pen is down, the user never will be able to 424febf1dffSMark Brown * touch screen faster than a few times per 425febf1dffSMark Brown * second... On the other hand, when the user 426febf1dffSMark Brown * is actively working with the touchscreen we 427febf1dffSMark Brown * don't want to lose the quick response. So we 428febf1dffSMark Brown * will slowly increase sleep time after the 429febf1dffSMark Brown * pen is up and quicky restore it to ~one task 430febf1dffSMark Brown * switch when pen is down again. 431febf1dffSMark Brown */ 432febf1dffSMark Brown if (wm->ts_reader_interval < HZ / 10) 433febf1dffSMark Brown wm->ts_reader_interval++; 434febf1dffSMark Brown } 435febf1dffSMark Brown 436febf1dffSMark Brown } else if (rc & RC_VALID) { 437febf1dffSMark Brown dev_dbg(wm->dev, 438febf1dffSMark Brown "pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n", 439febf1dffSMark Brown data.x >> 12, data.x & 0xfff, data.y >> 12, 440febf1dffSMark Brown data.y & 0xfff, data.p >> 12, data.p & 0xfff); 441cfd5d096SMarkus Pargmann 442cfd5d096SMarkus Pargmann if (abs_x[0] > (data.x & 0xfff) || 443cfd5d096SMarkus Pargmann abs_x[1] < (data.x & 0xfff) || 444cfd5d096SMarkus Pargmann abs_y[0] > (data.y & 0xfff) || 445cfd5d096SMarkus Pargmann abs_y[1] < (data.y & 0xfff)) { 446cfd5d096SMarkus Pargmann dev_dbg(wm->dev, "Measurement out of range, dropping it\n"); 447cfd5d096SMarkus Pargmann rc = RC_AGAIN; 448cfd5d096SMarkus Pargmann goto out; 449cfd5d096SMarkus Pargmann } 450cfd5d096SMarkus Pargmann 451febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_X, data.x & 0xfff); 452febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_Y, data.y & 0xfff); 453febf1dffSMark Brown input_report_abs(wm->input_dev, ABS_PRESSURE, data.p & 0xfff); 45465db86acSMike Rapoport input_report_key(wm->input_dev, BTN_TOUCH, 1); 455febf1dffSMark Brown input_sync(wm->input_dev); 456febf1dffSMark Brown wm->pen_is_down = 1; 457febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 458febf1dffSMark Brown } else if (rc & RC_PENDOWN) { 459febf1dffSMark Brown dev_dbg(wm->dev, "pen down\n"); 460febf1dffSMark Brown wm->pen_is_down = 1; 461febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 462febf1dffSMark Brown } 463febf1dffSMark Brown 464cfd5d096SMarkus Pargmann out: 465febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 466febf1dffSMark Brown return rc; 467febf1dffSMark Brown } 468febf1dffSMark Brown 469febf1dffSMark Brown /* 470febf1dffSMark Brown * The touchscreen sample reader. 471febf1dffSMark Brown */ 472febf1dffSMark Brown static void wm97xx_ts_reader(struct work_struct *work) 473febf1dffSMark Brown { 474febf1dffSMark Brown int rc; 475febf1dffSMark Brown struct wm97xx *wm = container_of(work, struct wm97xx, ts_reader.work); 476febf1dffSMark Brown 477febf1dffSMark Brown BUG_ON(!wm->codec); 478febf1dffSMark Brown 479febf1dffSMark Brown do { 480febf1dffSMark Brown rc = wm97xx_read_samples(wm); 481febf1dffSMark Brown } while (rc & RC_AGAIN); 482febf1dffSMark Brown 483febf1dffSMark Brown if (wm->pen_is_down || !wm->pen_irq) 484febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 485febf1dffSMark Brown wm->ts_reader_interval); 486febf1dffSMark Brown } 487febf1dffSMark Brown 488febf1dffSMark Brown /** 489febf1dffSMark Brown * wm97xx_ts_input_open - Open the touch screen input device. 490febf1dffSMark Brown * @idev: Input device to be opened. 491febf1dffSMark Brown * 492febf1dffSMark Brown * Called by the input sub system to open a wm97xx touchscreen device. 493febf1dffSMark Brown * Starts the touchscreen thread and touch digitiser. 494febf1dffSMark Brown */ 495febf1dffSMark Brown static int wm97xx_ts_input_open(struct input_dev *idev) 496febf1dffSMark Brown { 497febf1dffSMark Brown struct wm97xx *wm = input_get_drvdata(idev); 498febf1dffSMark Brown 499c9a3a7cfSBhaktipriya Shridhar wm->ts_workq = alloc_ordered_workqueue("kwm97xx", 0); 500febf1dffSMark Brown if (wm->ts_workq == NULL) { 501febf1dffSMark Brown dev_err(wm->dev, 502febf1dffSMark Brown "Failed to create workqueue\n"); 503febf1dffSMark Brown return -EINVAL; 504febf1dffSMark Brown } 505febf1dffSMark Brown 506febf1dffSMark Brown /* start digitiser */ 507febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 508febf1dffSMark Brown wm->codec->acc_enable(wm, 1); 509febf1dffSMark Brown wm->codec->dig_enable(wm, 1); 510febf1dffSMark Brown 511febf1dffSMark Brown INIT_DELAYED_WORK(&wm->ts_reader, wm97xx_ts_reader); 512febf1dffSMark Brown INIT_WORK(&wm->pen_event_work, wm97xx_pen_irq_worker); 513febf1dffSMark Brown 514febf1dffSMark Brown wm->ts_reader_min_interval = HZ >= 100 ? HZ / 100 : 1; 515febf1dffSMark Brown if (wm->ts_reader_min_interval < 1) 516febf1dffSMark Brown wm->ts_reader_min_interval = 1; 517febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 518febf1dffSMark Brown 519febf1dffSMark Brown wm->pen_is_down = 0; 520febf1dffSMark Brown if (wm->pen_irq) 521febf1dffSMark Brown wm97xx_init_pen_irq(wm); 522febf1dffSMark Brown else 523febf1dffSMark Brown dev_err(wm->dev, "No IRQ specified\n"); 524febf1dffSMark Brown 525febf1dffSMark Brown /* If we either don't have an interrupt for pen down events or 526febf1dffSMark Brown * failed to acquire it then we need to poll. 527febf1dffSMark Brown */ 528febf1dffSMark Brown if (wm->pen_irq == 0) 529febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 530febf1dffSMark Brown wm->ts_reader_interval); 531febf1dffSMark Brown 532febf1dffSMark Brown return 0; 533febf1dffSMark Brown } 534febf1dffSMark Brown 535febf1dffSMark Brown /** 536febf1dffSMark Brown * wm97xx_ts_input_close - Close the touch screen input device. 537febf1dffSMark Brown * @idev: Input device to be closed. 538febf1dffSMark Brown * 539febf1dffSMark Brown * Called by the input sub system to close a wm97xx touchscreen 540febf1dffSMark Brown * device. Kills the touchscreen thread and stops the touch 541febf1dffSMark Brown * digitiser. 542febf1dffSMark Brown */ 543febf1dffSMark Brown 544febf1dffSMark Brown static void wm97xx_ts_input_close(struct input_dev *idev) 545febf1dffSMark Brown { 546febf1dffSMark Brown struct wm97xx *wm = input_get_drvdata(idev); 547febf1dffSMark Brown u16 reg; 548febf1dffSMark Brown 549febf1dffSMark Brown if (wm->pen_irq) { 550febf1dffSMark Brown /* Return the interrupt to GPIO usage (disabling it) */ 551febf1dffSMark Brown if (wm->id != WM9705_ID2) { 552febf1dffSMark Brown BUG_ON(!wm->mach_ops->irq_gpio); 553febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_MISC_AFE); 554febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, 555febf1dffSMark Brown reg | wm->mach_ops->irq_gpio); 556febf1dffSMark Brown } 557febf1dffSMark Brown 558febf1dffSMark Brown free_irq(wm->pen_irq, wm); 559febf1dffSMark Brown } 560febf1dffSMark Brown 561febf1dffSMark Brown wm->pen_is_down = 0; 562febf1dffSMark Brown 563febf1dffSMark Brown /* Balance out interrupt disables/enables */ 564febf1dffSMark Brown if (cancel_work_sync(&wm->pen_event_work)) 565febf1dffSMark Brown wm->mach_ops->irq_enable(wm, 1); 566febf1dffSMark Brown 567febf1dffSMark Brown /* ts_reader rearms itself so we need to explicitly stop it 568febf1dffSMark Brown * before we destroy the workqueue. 569febf1dffSMark Brown */ 570febf1dffSMark Brown cancel_delayed_work_sync(&wm->ts_reader); 571febf1dffSMark Brown 572febf1dffSMark Brown destroy_workqueue(wm->ts_workq); 573febf1dffSMark Brown 574febf1dffSMark Brown /* stop digitiser */ 575febf1dffSMark Brown wm->codec->dig_enable(wm, 0); 576febf1dffSMark Brown if (wm->mach_ops && wm->mach_ops->acc_enabled) 577febf1dffSMark Brown wm->codec->acc_enable(wm, 0); 578febf1dffSMark Brown } 579febf1dffSMark Brown 580c72f61e7SRobert Jarzmik static int wm97xx_register_touch(struct wm97xx *wm) 581febf1dffSMark Brown { 582c72f61e7SRobert Jarzmik struct wm97xx_pdata *pdata = dev_get_platdata(wm->dev); 583c72f61e7SRobert Jarzmik int ret; 584febf1dffSMark Brown 585c72f61e7SRobert Jarzmik wm->input_dev = devm_input_allocate_device(wm->dev); 586c72f61e7SRobert Jarzmik if (wm->input_dev == NULL) 587febf1dffSMark Brown return -ENOMEM; 588febf1dffSMark Brown 589c72f61e7SRobert Jarzmik /* set up touch configuration */ 590c72f61e7SRobert Jarzmik wm->input_dev->name = "wm97xx touchscreen"; 591c72f61e7SRobert Jarzmik wm->input_dev->phys = "wm97xx"; 592c72f61e7SRobert Jarzmik wm->input_dev->open = wm97xx_ts_input_open; 593c72f61e7SRobert Jarzmik wm->input_dev->close = wm97xx_ts_input_close; 594c72f61e7SRobert Jarzmik 595c72f61e7SRobert Jarzmik __set_bit(EV_ABS, wm->input_dev->evbit); 596c72f61e7SRobert Jarzmik __set_bit(EV_KEY, wm->input_dev->evbit); 597c72f61e7SRobert Jarzmik __set_bit(BTN_TOUCH, wm->input_dev->keybit); 598c72f61e7SRobert Jarzmik 599c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_X, abs_x[0], abs_x[1], 600c72f61e7SRobert Jarzmik abs_x[2], 0); 601c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_Y, abs_y[0], abs_y[1], 602c72f61e7SRobert Jarzmik abs_y[2], 0); 603c72f61e7SRobert Jarzmik input_set_abs_params(wm->input_dev, ABS_PRESSURE, abs_p[0], abs_p[1], 604c72f61e7SRobert Jarzmik abs_p[2], 0); 605c72f61e7SRobert Jarzmik 606c72f61e7SRobert Jarzmik input_set_drvdata(wm->input_dev, wm); 607c72f61e7SRobert Jarzmik wm->input_dev->dev.parent = wm->dev; 608c72f61e7SRobert Jarzmik 609c72f61e7SRobert Jarzmik ret = input_register_device(wm->input_dev); 610c72f61e7SRobert Jarzmik if (ret) 611c72f61e7SRobert Jarzmik return ret; 612c72f61e7SRobert Jarzmik 613c72f61e7SRobert Jarzmik /* 614c72f61e7SRobert Jarzmik * register our extended touch device (for machine specific 615c72f61e7SRobert Jarzmik * extensions) 616c72f61e7SRobert Jarzmik */ 617c72f61e7SRobert Jarzmik wm->touch_dev = platform_device_alloc("wm97xx-touch", -1); 618c72f61e7SRobert Jarzmik if (!wm->touch_dev) { 619c72f61e7SRobert Jarzmik ret = -ENOMEM; 620c72f61e7SRobert Jarzmik goto touch_err; 621c72f61e7SRobert Jarzmik } 622c72f61e7SRobert Jarzmik platform_set_drvdata(wm->touch_dev, wm); 623c72f61e7SRobert Jarzmik wm->touch_dev->dev.parent = wm->dev; 624c72f61e7SRobert Jarzmik wm->touch_dev->dev.platform_data = pdata; 625c72f61e7SRobert Jarzmik ret = platform_device_add(wm->touch_dev); 626c72f61e7SRobert Jarzmik if (ret < 0) 627c72f61e7SRobert Jarzmik goto touch_reg_err; 628c72f61e7SRobert Jarzmik 629c72f61e7SRobert Jarzmik return 0; 630c72f61e7SRobert Jarzmik touch_reg_err: 631c72f61e7SRobert Jarzmik platform_device_put(wm->touch_dev); 632c72f61e7SRobert Jarzmik touch_err: 633c72f61e7SRobert Jarzmik input_unregister_device(wm->input_dev); 634c72f61e7SRobert Jarzmik wm->input_dev = NULL; 635c72f61e7SRobert Jarzmik 636c72f61e7SRobert Jarzmik return ret; 637c72f61e7SRobert Jarzmik } 638c72f61e7SRobert Jarzmik 639c72f61e7SRobert Jarzmik static void wm97xx_unregister_touch(struct wm97xx *wm) 640c72f61e7SRobert Jarzmik { 641c72f61e7SRobert Jarzmik platform_device_unregister(wm->touch_dev); 642c72f61e7SRobert Jarzmik input_unregister_device(wm->input_dev); 643c72f61e7SRobert Jarzmik wm->input_dev = NULL; 644c72f61e7SRobert Jarzmik } 645c72f61e7SRobert Jarzmik 646c72f61e7SRobert Jarzmik static int _wm97xx_probe(struct wm97xx *wm) 647c72f61e7SRobert Jarzmik { 648c72f61e7SRobert Jarzmik int id = 0; 649c72f61e7SRobert Jarzmik 650c72f61e7SRobert Jarzmik mutex_init(&wm->codec_mutex); 651c72f61e7SRobert Jarzmik dev_set_drvdata(wm->dev, wm); 652febf1dffSMark Brown 653febf1dffSMark Brown /* check that we have a supported codec */ 654febf1dffSMark Brown id = wm97xx_reg_read(wm, AC97_VENDOR_ID1); 655febf1dffSMark Brown if (id != WM97XX_ID1) { 656c72f61e7SRobert Jarzmik dev_err(wm->dev, 657c72f61e7SRobert Jarzmik "Device with vendor %04x is not a wm97xx\n", id); 658c72f61e7SRobert Jarzmik return -ENODEV; 659febf1dffSMark Brown } 660febf1dffSMark Brown 661febf1dffSMark Brown wm->id = wm97xx_reg_read(wm, AC97_VENDOR_ID2); 662febf1dffSMark Brown 66399fde513SMarek Vasut wm->variant = WM97xx_GENERIC; 66499fde513SMarek Vasut 665febf1dffSMark Brown dev_info(wm->dev, "detected a wm97%02x codec\n", wm->id & 0xff); 666febf1dffSMark Brown 667febf1dffSMark Brown switch (wm->id & 0xff) { 668febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9705 669febf1dffSMark Brown case 0x05: 670febf1dffSMark Brown wm->codec = &wm9705_codec; 671febf1dffSMark Brown break; 672febf1dffSMark Brown #endif 673febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9712 674febf1dffSMark Brown case 0x12: 675febf1dffSMark Brown wm->codec = &wm9712_codec; 676febf1dffSMark Brown break; 677febf1dffSMark Brown #endif 678febf1dffSMark Brown #ifdef CONFIG_TOUCHSCREEN_WM9713 679febf1dffSMark Brown case 0x13: 680febf1dffSMark Brown wm->codec = &wm9713_codec; 681febf1dffSMark Brown break; 682febf1dffSMark Brown #endif 683febf1dffSMark Brown default: 684febf1dffSMark Brown dev_err(wm->dev, "Support for wm97%02x not compiled in.\n", 685febf1dffSMark Brown wm->id & 0xff); 686c72f61e7SRobert Jarzmik return -ENODEV; 687febf1dffSMark Brown } 688febf1dffSMark Brown 6895de4cd43SMark Brown /* set up physical characteristics */ 6905de4cd43SMark Brown wm->codec->phy_init(wm); 6915de4cd43SMark Brown 6925de4cd43SMark Brown /* load gpio cache */ 6935de4cd43SMark Brown wm->gpio[0] = wm97xx_reg_read(wm, AC97_GPIO_CFG); 6945de4cd43SMark Brown wm->gpio[1] = wm97xx_reg_read(wm, AC97_GPIO_POLARITY); 6955de4cd43SMark Brown wm->gpio[2] = wm97xx_reg_read(wm, AC97_GPIO_STICKY); 6965de4cd43SMark Brown wm->gpio[3] = wm97xx_reg_read(wm, AC97_GPIO_WAKEUP); 6975de4cd43SMark Brown wm->gpio[4] = wm97xx_reg_read(wm, AC97_GPIO_STATUS); 6985de4cd43SMark Brown wm->gpio[5] = wm97xx_reg_read(wm, AC97_MISC_AFE); 6995de4cd43SMark Brown 700c72f61e7SRobert Jarzmik return wm97xx_register_touch(wm); 701febf1dffSMark Brown } 702febf1dffSMark Brown 703c72f61e7SRobert Jarzmik static void wm97xx_remove_battery(struct wm97xx *wm) 704c72f61e7SRobert Jarzmik { 705c72f61e7SRobert Jarzmik platform_device_unregister(wm->battery_dev); 706c72f61e7SRobert Jarzmik } 70765db86acSMike Rapoport 708c72f61e7SRobert Jarzmik static int wm97xx_add_battery(struct wm97xx *wm, 709c72f61e7SRobert Jarzmik struct wm97xx_batt_pdata *pdata) 710c72f61e7SRobert Jarzmik { 711c72f61e7SRobert Jarzmik int ret; 71265db86acSMike Rapoport 713febf1dffSMark Brown wm->battery_dev = platform_device_alloc("wm97xx-battery", -1); 714c72f61e7SRobert Jarzmik if (!wm->battery_dev) 715c72f61e7SRobert Jarzmik return -ENOMEM; 716febf1dffSMark Brown 717c72f61e7SRobert Jarzmik platform_set_drvdata(wm->battery_dev, wm); 718c72f61e7SRobert Jarzmik wm->battery_dev->dev.parent = wm->dev; 719c72f61e7SRobert Jarzmik wm->battery_dev->dev.platform_data = pdata; 720c72f61e7SRobert Jarzmik ret = platform_device_add(wm->battery_dev); 721c72f61e7SRobert Jarzmik if (ret) 722c72f61e7SRobert Jarzmik platform_device_put(wm->battery_dev); 723c72f61e7SRobert Jarzmik 724c72f61e7SRobert Jarzmik return ret; 725febf1dffSMark Brown } 726c72f61e7SRobert Jarzmik 727c72f61e7SRobert Jarzmik static int wm97xx_probe(struct device *dev) 728c72f61e7SRobert Jarzmik { 729c72f61e7SRobert Jarzmik struct wm97xx *wm; 730c72f61e7SRobert Jarzmik int ret; 731c72f61e7SRobert Jarzmik struct wm97xx_pdata *pdata = dev_get_platdata(dev); 732c72f61e7SRobert Jarzmik 733c72f61e7SRobert Jarzmik wm = devm_kzalloc(dev, sizeof(struct wm97xx), GFP_KERNEL); 734c72f61e7SRobert Jarzmik if (!wm) 735c72f61e7SRobert Jarzmik return -ENOMEM; 736c72f61e7SRobert Jarzmik 737c72f61e7SRobert Jarzmik wm->dev = dev; 738c72f61e7SRobert Jarzmik wm->ac97 = to_ac97_t(dev); 739c72f61e7SRobert Jarzmik 740c72f61e7SRobert Jarzmik ret = _wm97xx_probe(wm); 741c72f61e7SRobert Jarzmik if (ret) 742c72f61e7SRobert Jarzmik return ret; 743c72f61e7SRobert Jarzmik 744c72f61e7SRobert Jarzmik ret = wm97xx_add_battery(wm, pdata ? pdata->batt_pdata : NULL); 745febf1dffSMark Brown if (ret < 0) 746c72f61e7SRobert Jarzmik goto batt_err; 747febf1dffSMark Brown 748febf1dffSMark Brown return ret; 749febf1dffSMark Brown 750febf1dffSMark Brown batt_err: 751c72f61e7SRobert Jarzmik wm97xx_unregister_touch(wm); 752febf1dffSMark Brown return ret; 753febf1dffSMark Brown } 754febf1dffSMark Brown 755febf1dffSMark Brown static int wm97xx_remove(struct device *dev) 756febf1dffSMark Brown { 757febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 758febf1dffSMark Brown 759c72f61e7SRobert Jarzmik wm97xx_remove_battery(wm); 760c72f61e7SRobert Jarzmik wm97xx_unregister_touch(wm); 761febf1dffSMark Brown 762febf1dffSMark Brown return 0; 763febf1dffSMark Brown } 764febf1dffSMark Brown 765ae9d1b5fSRobert Jarzmik static int wm97xx_mfd_probe(struct platform_device *pdev) 766ae9d1b5fSRobert Jarzmik { 767ae9d1b5fSRobert Jarzmik struct wm97xx *wm; 768ae9d1b5fSRobert Jarzmik struct wm97xx_platform_data *mfd_pdata = dev_get_platdata(&pdev->dev); 769ae9d1b5fSRobert Jarzmik int ret; 770ae9d1b5fSRobert Jarzmik 771ae9d1b5fSRobert Jarzmik wm = devm_kzalloc(&pdev->dev, sizeof(struct wm97xx), GFP_KERNEL); 772ae9d1b5fSRobert Jarzmik if (!wm) 773ae9d1b5fSRobert Jarzmik return -ENOMEM; 774ae9d1b5fSRobert Jarzmik 775ae9d1b5fSRobert Jarzmik wm->dev = &pdev->dev; 776ae9d1b5fSRobert Jarzmik wm->ac97 = mfd_pdata->ac97; 777ae9d1b5fSRobert Jarzmik 778ae9d1b5fSRobert Jarzmik ret = _wm97xx_probe(wm); 779ae9d1b5fSRobert Jarzmik if (ret) 780ae9d1b5fSRobert Jarzmik return ret; 781ae9d1b5fSRobert Jarzmik 782ae9d1b5fSRobert Jarzmik ret = wm97xx_add_battery(wm, mfd_pdata->batt_pdata); 783ae9d1b5fSRobert Jarzmik if (ret < 0) 784ae9d1b5fSRobert Jarzmik goto batt_err; 785ae9d1b5fSRobert Jarzmik 786ae9d1b5fSRobert Jarzmik return ret; 787ae9d1b5fSRobert Jarzmik 788ae9d1b5fSRobert Jarzmik batt_err: 789ae9d1b5fSRobert Jarzmik wm97xx_unregister_touch(wm); 790ae9d1b5fSRobert Jarzmik return ret; 791ae9d1b5fSRobert Jarzmik } 792ae9d1b5fSRobert Jarzmik 793ae9d1b5fSRobert Jarzmik static int wm97xx_mfd_remove(struct platform_device *pdev) 794ae9d1b5fSRobert Jarzmik { 795ae9d1b5fSRobert Jarzmik return wm97xx_remove(&pdev->dev); 796ae9d1b5fSRobert Jarzmik } 797ae9d1b5fSRobert Jarzmik 7989bc07dfbSLars-Peter Clausen static int __maybe_unused wm97xx_suspend(struct device *dev) 799febf1dffSMark Brown { 800febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 80134d27853SMark Brown u16 reg; 80234d27853SMark Brown int suspend_mode; 80334d27853SMark Brown 80434d27853SMark Brown if (device_may_wakeup(&wm->input_dev->dev)) 80534d27853SMark Brown suspend_mode = wm->suspend_mode; 80634d27853SMark Brown else 80734d27853SMark Brown suspend_mode = 0; 808febf1dffSMark Brown 809febf1dffSMark Brown if (wm->input_dev->users) 810febf1dffSMark Brown cancel_delayed_work_sync(&wm->ts_reader); 811febf1dffSMark Brown 81234d27853SMark Brown /* Power down the digitiser (bypassing the cache for resume) */ 81334d27853SMark Brown reg = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER2); 81434d27853SMark Brown reg &= ~WM97XX_PRP_DET_DIG; 81534d27853SMark Brown if (wm->input_dev->users) 81634d27853SMark Brown reg |= suspend_mode; 81734d27853SMark Brown wm->ac97->bus->ops->write(wm->ac97, AC97_WM97XX_DIGITISER2, reg); 81834d27853SMark Brown 81934d27853SMark Brown /* WM9713 has an additional power bit - turn it off if there 82034d27853SMark Brown * are no users or if suspend mode is zero. */ 82134d27853SMark Brown if (wm->id == WM9713_ID2 && 82234d27853SMark Brown (!wm->input_dev->users || !suspend_mode)) { 82334d27853SMark Brown reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) | 0x8000; 82434d27853SMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); 82534d27853SMark Brown } 82634d27853SMark Brown 827febf1dffSMark Brown return 0; 828febf1dffSMark Brown } 829febf1dffSMark Brown 8309bc07dfbSLars-Peter Clausen static int __maybe_unused wm97xx_resume(struct device *dev) 831febf1dffSMark Brown { 832febf1dffSMark Brown struct wm97xx *wm = dev_get_drvdata(dev); 833febf1dffSMark Brown 834febf1dffSMark Brown /* restore digitiser and gpios */ 835febf1dffSMark Brown if (wm->id == WM9713_ID2) { 836febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG1, wm->dig[0]); 837febf1dffSMark Brown wm97xx_reg_write(wm, 0x5a, wm->misc); 838febf1dffSMark Brown if (wm->input_dev->users) { 839febf1dffSMark Brown u16 reg; 840febf1dffSMark Brown reg = wm97xx_reg_read(wm, AC97_EXTENDED_MID) & 0x7fff; 841febf1dffSMark Brown wm97xx_reg_write(wm, AC97_EXTENDED_MID, reg); 842febf1dffSMark Brown } 843febf1dffSMark Brown } 844febf1dffSMark Brown 845febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG2, wm->dig[1]); 846febf1dffSMark Brown wm97xx_reg_write(wm, AC97_WM9713_DIG3, wm->dig[2]); 847febf1dffSMark Brown 848febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_CFG, wm->gpio[0]); 849febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_POLARITY, wm->gpio[1]); 850febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STICKY, wm->gpio[2]); 851febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_WAKEUP, wm->gpio[3]); 852febf1dffSMark Brown wm97xx_reg_write(wm, AC97_GPIO_STATUS, wm->gpio[4]); 853febf1dffSMark Brown wm97xx_reg_write(wm, AC97_MISC_AFE, wm->gpio[5]); 854febf1dffSMark Brown 855febf1dffSMark Brown if (wm->input_dev->users && !wm->pen_irq) { 856febf1dffSMark Brown wm->ts_reader_interval = wm->ts_reader_min_interval; 857febf1dffSMark Brown queue_delayed_work(wm->ts_workq, &wm->ts_reader, 858febf1dffSMark Brown wm->ts_reader_interval); 859febf1dffSMark Brown } 860febf1dffSMark Brown 861febf1dffSMark Brown return 0; 862febf1dffSMark Brown } 863febf1dffSMark Brown 8649bc07dfbSLars-Peter Clausen static SIMPLE_DEV_PM_OPS(wm97xx_pm_ops, wm97xx_suspend, wm97xx_resume); 865febf1dffSMark Brown 866febf1dffSMark Brown /* 867febf1dffSMark Brown * Machine specific operations 868febf1dffSMark Brown */ 869febf1dffSMark Brown int wm97xx_register_mach_ops(struct wm97xx *wm, 870febf1dffSMark Brown struct wm97xx_mach_ops *mach_ops) 871febf1dffSMark Brown { 872febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 873febf1dffSMark Brown if (wm->mach_ops) { 874febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 875febf1dffSMark Brown return -EINVAL; 876febf1dffSMark Brown } 877febf1dffSMark Brown wm->mach_ops = mach_ops; 878febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 879febf1dffSMark Brown 880febf1dffSMark Brown return 0; 881febf1dffSMark Brown } 882febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_register_mach_ops); 883febf1dffSMark Brown 884febf1dffSMark Brown void wm97xx_unregister_mach_ops(struct wm97xx *wm) 885febf1dffSMark Brown { 886febf1dffSMark Brown mutex_lock(&wm->codec_mutex); 887febf1dffSMark Brown wm->mach_ops = NULL; 888febf1dffSMark Brown mutex_unlock(&wm->codec_mutex); 889febf1dffSMark Brown } 890febf1dffSMark Brown EXPORT_SYMBOL_GPL(wm97xx_unregister_mach_ops); 891febf1dffSMark Brown 892febf1dffSMark Brown static struct device_driver wm97xx_driver = { 893ef9db492SMark Brown .name = "wm97xx-ts", 894ae9d1b5fSRobert Jarzmik #ifdef CONFIG_AC97_BUS 895febf1dffSMark Brown .bus = &ac97_bus_type, 896ae9d1b5fSRobert Jarzmik #endif 897febf1dffSMark Brown .owner = THIS_MODULE, 898febf1dffSMark Brown .probe = wm97xx_probe, 899febf1dffSMark Brown .remove = wm97xx_remove, 9009bc07dfbSLars-Peter Clausen .pm = &wm97xx_pm_ops, 901febf1dffSMark Brown }; 902febf1dffSMark Brown 903ae9d1b5fSRobert Jarzmik static struct platform_driver wm97xx_mfd_driver = { 904ae9d1b5fSRobert Jarzmik .driver = { 905ae9d1b5fSRobert Jarzmik .name = "wm97xx-ts", 906ae9d1b5fSRobert Jarzmik .pm = &wm97xx_pm_ops, 907ae9d1b5fSRobert Jarzmik }, 908ae9d1b5fSRobert Jarzmik .probe = wm97xx_mfd_probe, 909ae9d1b5fSRobert Jarzmik .remove = wm97xx_mfd_remove, 910ae9d1b5fSRobert Jarzmik }; 911ae9d1b5fSRobert Jarzmik 912febf1dffSMark Brown static int __init wm97xx_init(void) 913febf1dffSMark Brown { 914ae9d1b5fSRobert Jarzmik int ret; 915ae9d1b5fSRobert Jarzmik 916ae9d1b5fSRobert Jarzmik ret = platform_driver_register(&wm97xx_mfd_driver); 917ae9d1b5fSRobert Jarzmik if (ret) 918ae9d1b5fSRobert Jarzmik return ret; 919ae9d1b5fSRobert Jarzmik 920ae9d1b5fSRobert Jarzmik if (IS_BUILTIN(CONFIG_AC97_BUS)) 921ae9d1b5fSRobert Jarzmik ret = driver_register(&wm97xx_driver); 922ae9d1b5fSRobert Jarzmik return ret; 923febf1dffSMark Brown } 924febf1dffSMark Brown 925febf1dffSMark Brown static void __exit wm97xx_exit(void) 926febf1dffSMark Brown { 927a3f7c3fcSRandy Dunlap if (IS_BUILTIN(CONFIG_AC97_BUS)) 928febf1dffSMark Brown driver_unregister(&wm97xx_driver); 929ae9d1b5fSRobert Jarzmik platform_driver_unregister(&wm97xx_mfd_driver); 930febf1dffSMark Brown } 931febf1dffSMark Brown 932febf1dffSMark Brown module_init(wm97xx_init); 933febf1dffSMark Brown module_exit(wm97xx_exit); 934febf1dffSMark Brown 935febf1dffSMark Brown /* Module information */ 936b8d055a8SLiam Girdwood MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>"); 937febf1dffSMark Brown MODULE_DESCRIPTION("WM97xx Core - Touch Screen / AUX ADC / GPIO Driver"); 938febf1dffSMark Brown MODULE_LICENSE("GPL"); 939