// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2006-2008 Michael Hennerich, Analog Devices Inc. * * Description: AD7877 based touchscreen, sensor (ADCs), DAC and GPIO driver * Based on: ads7846.c * * Bugs: Enter bugs at http://blackfin.uclinux.org/ * * History: * Copyright (c) 2005 David Brownell * Copyright (c) 2006 Nokia Corporation * Various changes: Imre Deak <[email protected]> * * Using code from: * - corgi_ts.c * Copyright (C) 2004-2005 Richard Purdie * - omap_ts.[hc], ads7846.h, ts_osk.c * Copyright (C) 2002 MontaVista Software * Copyright (C) 2004 Texas Instruments * Copyright (C) 2005 Dirk Behme */ #include <linux/device.h> #include <linux/delay.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/pm.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/spi/ad7877.h> #include <linux/module.h> #include <asm/irq.h> #define TS_PEN_UP_TIMEOUT … #define MAX_SPI_FREQ_HZ … #define MAX_12BIT … #define AD7877_REG_ZEROS … #define AD7877_REG_CTRL1 … #define AD7877_REG_CTRL2 … #define AD7877_REG_ALERT … #define AD7877_REG_AUX1HIGH … #define AD7877_REG_AUX1LOW … #define AD7877_REG_BAT1HIGH … #define AD7877_REG_BAT1LOW … #define AD7877_REG_BAT2HIGH … #define AD7877_REG_BAT2LOW … #define AD7877_REG_TEMP1HIGH … #define AD7877_REG_TEMP1LOW … #define AD7877_REG_SEQ0 … #define AD7877_REG_SEQ1 … #define AD7877_REG_DAC … #define AD7877_REG_NONE1 … #define AD7877_REG_EXTWRITE … #define AD7877_REG_XPLUS … #define AD7877_REG_YPLUS … #define AD7877_REG_Z2 … #define AD7877_REG_aux1 … #define AD7877_REG_aux2 … #define AD7877_REG_aux3 … #define AD7877_REG_bat1 … #define AD7877_REG_bat2 … #define AD7877_REG_temp1 … #define AD7877_REG_temp2 … #define AD7877_REG_Z1 … #define AD7877_REG_GPIOCTRL1 … #define AD7877_REG_GPIOCTRL2 … #define AD7877_REG_GPIODATA … #define AD7877_REG_NONE2 … #define AD7877_REG_NONE3 … #define AD7877_SEQ_YPLUS_BIT … #define AD7877_SEQ_XPLUS_BIT … #define AD7877_SEQ_Z2_BIT … #define AD7877_SEQ_AUX1_BIT … #define AD7877_SEQ_AUX2_BIT … #define AD7877_SEQ_AUX3_BIT … #define AD7877_SEQ_BAT1_BIT … #define AD7877_SEQ_BAT2_BIT … #define AD7877_SEQ_TEMP1_BIT … #define AD7877_SEQ_TEMP2_BIT … #define AD7877_SEQ_Z1_BIT … enum { … }; /* DAC Register Default RANGE 0 to Vcc, Volatge Mode, DAC On */ #define AD7877_DAC_CONF … /* If gpio3 is set AUX3/GPIO3 acts as GPIO Output */ #define AD7877_EXTW_GPIO_3_CONF … #define AD7877_EXTW_GPIO_DATA … /* Control REG 2 */ #define AD7877_TMR(x) … #define AD7877_REF(x) … #define AD7877_POL(x) … #define AD7877_FCD(x) … #define AD7877_PM(x) … #define AD7877_ACQ(x) … #define AD7877_AVG(x) … /* Control REG 1 */ #define AD7877_SER … #define AD7877_DFR … #define AD7877_MODE_NOC … #define AD7877_MODE_SCC … #define AD7877_MODE_SEQ0 … #define AD7877_MODE_SEQ1 … #define AD7877_CHANADD(x) … #define AD7877_READADD(x) … #define AD7877_WRITEADD(x) … #define AD7877_READ_CHAN(x) … #define AD7877_MM_SEQUENCE … /* * Non-touchscreen sensors only use single-ended conversions. */ struct ser_req { … }; struct ad7877 { … }; static bool gpio3; module_param(gpio3, bool, 0); MODULE_PARM_DESC(…) …; static int ad7877_read(struct spi_device *spi, u16 reg) { … } static int ad7877_write(struct spi_device *spi, u16 reg, u16 val) { … } static int ad7877_read_adc(struct spi_device *spi, unsigned command) { … } static int ad7877_process_data(struct ad7877 *ts) { … } static inline void ad7877_ts_event_release(struct ad7877 *ts) { … } static void ad7877_timer(struct timer_list *t) { … } static irqreturn_t ad7877_irq(int irq, void *handle) { … } static void ad7877_disable(void *data) { … } static void ad7877_enable(struct ad7877 *ts) { … } #define SHOW(name) … SHOW(…) SHOW(…) SHOW(…) SHOW(…) SHOW(…) SHOW(…) SHOW(…) static ssize_t ad7877_disable_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ad7877_disable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(disable, 0664, ad7877_disable_show, ad7877_disable_store); static ssize_t ad7877_dac_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ad7877_dac_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(dac, 0664, ad7877_dac_show, ad7877_dac_store); static ssize_t ad7877_gpio3_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ad7877_gpio3_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(gpio3, 0664, ad7877_gpio3_show, ad7877_gpio3_store); static ssize_t ad7877_gpio4_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ad7877_gpio4_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(gpio4, 0664, ad7877_gpio4_show, ad7877_gpio4_store); static struct attribute *ad7877_attributes[] = …; static umode_t ad7877_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) { … } static const struct attribute_group ad7877_group = …; __ATTRIBUTE_GROUPS(…); static void ad7877_setup_ts_def_msg(struct spi_device *spi, struct ad7877 *ts) { … } static int ad7877_probe(struct spi_device *spi) { … } static int ad7877_suspend(struct device *dev) { … } static int ad7877_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(ad7877_pm, ad7877_suspend, ad7877_resume); static struct spi_driver ad7877_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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