// SPDX-License-Identifier: GPL-2.0-or-later /* * Atmel maXTouch Touchscreen driver * * Copyright (C) 2010 Samsung Electronics Co.Ltd * Copyright (C) 2011-2014 Atmel Corporation * Copyright (C) 2012 Google, Inc. * Copyright (C) 2016 Zodiac Inflight Innovations * * Author: Joonyoung Shim <[email protected]> */ #include <linux/acpi.h> #include <linux/dmi.h> #include <linux/module.h> #include <linux/init.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/firmware.h> #include <linux/i2c.h> #include <linux/input/mt.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/of.h> #include <linux/property.h> #include <linux/slab.h> #include <linux/regulator/consumer.h> #include <linux/gpio/consumer.h> #include <linux/unaligned.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> #include <media/videobuf2-v4l2.h> #include <media/videobuf2-vmalloc.h> #include <dt-bindings/input/atmel-maxtouch.h> /* Firmware files */ #define MXT_FW_NAME … #define MXT_CFG_NAME … #define MXT_CFG_MAGIC … /* Registers */ #define MXT_OBJECT_START … #define MXT_OBJECT_SIZE … #define MXT_INFO_CHECKSUM_SIZE … #define MXT_MAX_BLOCK_WRITE … /* Object types */ #define MXT_DEBUG_DIAGNOSTIC_T37 … #define MXT_GEN_MESSAGE_T5 … #define MXT_GEN_COMMAND_T6 … #define MXT_GEN_POWER_T7 … #define MXT_GEN_ACQUIRE_T8 … #define MXT_GEN_DATASOURCE_T53 … #define MXT_TOUCH_MULTI_T9 … #define MXT_TOUCH_KEYARRAY_T15 … #define MXT_TOUCH_PROXIMITY_T23 … #define MXT_TOUCH_PROXKEY_T52 … #define MXT_TOUCH_PTC_KEYS_T97 … #define MXT_PROCI_GRIPFACE_T20 … #define MXT_PROCG_NOISE_T22 … #define MXT_PROCI_ONETOUCH_T24 … #define MXT_PROCI_TWOTOUCH_T27 … #define MXT_PROCI_GRIP_T40 … #define MXT_PROCI_PALM_T41 … #define MXT_PROCI_TOUCHSUPPRESSION_T42 … #define MXT_PROCI_STYLUS_T47 … #define MXT_PROCG_NOISESUPPRESSION_T48 … #define MXT_SPT_COMMSCONFIG_T18 … #define MXT_SPT_GPIOPWM_T19 … #define MXT_SPT_SELFTEST_T25 … #define MXT_SPT_CTECONFIG_T28 … #define MXT_SPT_USERDATA_T38 … #define MXT_SPT_DIGITIZER_T43 … #define MXT_SPT_MESSAGECOUNT_T44 … #define MXT_SPT_CTECONFIG_T46 … #define MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 … #define MXT_TOUCH_MULTITOUCHSCREEN_T100 … /* MXT_GEN_MESSAGE_T5 object */ #define MXT_RPTID_NOMSG … /* MXT_GEN_COMMAND_T6 field */ #define MXT_COMMAND_RESET … #define MXT_COMMAND_BACKUPNV … #define MXT_COMMAND_CALIBRATE … #define MXT_COMMAND_REPORTALL … #define MXT_COMMAND_DIAGNOSTIC … /* Define for T6 status byte */ #define MXT_T6_STATUS_RESET … #define MXT_T6_STATUS_OFL … #define MXT_T6_STATUS_SIGERR … #define MXT_T6_STATUS_CAL … #define MXT_T6_STATUS_CFGERR … #define MXT_T6_STATUS_COMSERR … /* MXT_GEN_POWER_T7 field */ struct t7_config { … } __packed; #define MXT_POWER_CFG_RUN … #define MXT_POWER_CFG_DEEPSLEEP … /* MXT_TOUCH_MULTI_T9 field */ #define MXT_T9_CTRL … #define MXT_T9_XSIZE … #define MXT_T9_YSIZE … #define MXT_T9_ORIENT … #define MXT_T9_RANGE … /* MXT_TOUCH_MULTI_T9 status */ #define MXT_T9_UNGRIP … #define MXT_T9_SUPPRESS … #define MXT_T9_AMP … #define MXT_T9_VECTOR … #define MXT_T9_MOVE … #define MXT_T9_RELEASE … #define MXT_T9_PRESS … #define MXT_T9_DETECT … struct t9_range { … } __packed; /* MXT_TOUCH_MULTI_T9 orient */ #define MXT_T9_ORIENT_SWITCH … #define MXT_T9_ORIENT_INVERTX … #define MXT_T9_ORIENT_INVERTY … /* MXT_SPT_COMMSCONFIG_T18 */ #define MXT_COMMS_CTRL … #define MXT_COMMS_CMD … #define MXT_COMMS_RETRIGEN … /* MXT_DEBUG_DIAGNOSTIC_T37 */ #define MXT_DIAGNOSTIC_PAGEUP … #define MXT_DIAGNOSTIC_DELTAS … #define MXT_DIAGNOSTIC_REFS … #define MXT_DIAGNOSTIC_SIZE … #define MXT_FAMILY_1386 … #define MXT1386_COLUMNS … #define MXT1386_PAGES_PER_COLUMN … struct t37_debug { … }; /* Define for MXT_GEN_COMMAND_T6 */ #define MXT_BOOT_VALUE … #define MXT_RESET_VALUE … #define MXT_BACKUP_VALUE … /* T100 Multiple Touch Touchscreen */ #define MXT_T100_CTRL … #define MXT_T100_CFG1 … #define MXT_T100_TCHAUX … #define MXT_T100_XSIZE … #define MXT_T100_XRANGE … #define MXT_T100_YSIZE … #define MXT_T100_YRANGE … #define MXT_T100_CFG_SWITCHXY … #define MXT_T100_CFG_INVERTY … #define MXT_T100_CFG_INVERTX … #define MXT_T100_TCHAUX_VECT … #define MXT_T100_TCHAUX_AMPL … #define MXT_T100_TCHAUX_AREA … #define MXT_T100_DETECT … #define MXT_T100_TYPE_MASK … enum t100_type { … }; #define MXT_DISTANCE_ACTIVE_TOUCH … #define MXT_DISTANCE_HOVERING … #define MXT_TOUCH_MAJOR_DEFAULT … #define MXT_PRESSURE_DEFAULT … /* Delay times */ #define MXT_BACKUP_TIME … #define MXT_RESET_GPIO_TIME … #define MXT_RESET_INVALID_CHG … #define MXT_RESET_TIME … #define MXT_RESET_TIMEOUT … #define MXT_CRC_TIMEOUT … #define MXT_FW_RESET_TIME … #define MXT_FW_CHG_TIMEOUT … #define MXT_WAKEUP_TIME … /* Command to unlock bootloader */ #define MXT_UNLOCK_CMD_MSB … #define MXT_UNLOCK_CMD_LSB … /* Bootloader mode status */ #define MXT_WAITING_BOOTLOAD_CMD … #define MXT_WAITING_FRAME_DATA … #define MXT_FRAME_CRC_CHECK … #define MXT_FRAME_CRC_FAIL … #define MXT_FRAME_CRC_PASS … #define MXT_APP_CRC_FAIL … #define MXT_BOOT_STATUS_MASK … #define MXT_BOOT_EXTENDED_ID … #define MXT_BOOT_ID_MASK … /* Touchscreen absolute values */ #define MXT_MAX_AREA … #define MXT_PIXELS_PER_MM … struct mxt_info { … }; struct mxt_object { … } __packed; struct mxt_dbg { … }; enum v4l_dbg_inputs { … }; enum mxt_suspend_mode { … }; /* Config update context */ struct mxt_cfg { … }; /* Each client has this additional data */ struct mxt_data { … }; struct mxt_vb2_buffer { … }; static size_t mxt_obj_size(const struct mxt_object *obj) { … } static size_t mxt_obj_instances(const struct mxt_object *obj) { … } static bool mxt_object_readable(unsigned int type) { … } static void mxt_dump_message(struct mxt_data *data, u8 *message) { … } static int mxt_wait_for_completion(struct mxt_data *data, struct completion *comp, unsigned int timeout_ms) { … } static int mxt_bootloader_read(struct mxt_data *data, u8 *val, unsigned int count) { … } static int mxt_bootloader_write(struct mxt_data *data, const u8 * const val, unsigned int count) { … } static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry) { … } static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address) { … } static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val) { … } static int mxt_check_bootloader(struct mxt_data *data, unsigned int state, bool wait) { … } static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock) { … } static bool mxt_wakeup_toggle(struct i2c_client *client, bool wake_up, bool in_i2c) { … } static int __mxt_read_reg(struct i2c_client *client, u16 reg, u16 len, void *val) { … } static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len, const void *val) { … } static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) { … } static struct mxt_object * mxt_get_object(struct mxt_data *data, u8 type) { … } static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg) { … } static int mxt_write_object(struct mxt_data *data, u8 type, u8 offset, u8 val) { … } static void mxt_input_button(struct mxt_data *data, u8 *message) { … } static void mxt_input_sync(struct mxt_data *data) { … } static void mxt_proc_t9_message(struct mxt_data *data, u8 *message) { … } static void mxt_proc_t15_messages(struct mxt_data *data, u8 *message) { … } static void mxt_proc_t97_messages(struct mxt_data *data, u8 *message) { … } static void mxt_proc_t100_message(struct mxt_data *data, u8 *message) { … } static int mxt_proc_message(struct mxt_data *data, u8 *message) { … } static int mxt_read_and_process_messages(struct mxt_data *data, u8 count) { … } static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) { … } static int mxt_process_messages_until_invalid(struct mxt_data *data) { … } static irqreturn_t mxt_process_messages(struct mxt_data *data) { … } static irqreturn_t mxt_interrupt(int irq, void *dev_id) { … } static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset, u8 value, bool wait) { … } static int mxt_acquire_irq(struct mxt_data *data) { … } static int mxt_soft_reset(struct mxt_data *data) { … } static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value) { … } static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte) { … } static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off) { … } static int mxt_check_retrigen(struct mxt_data *data) { … } static int mxt_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) { … } static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) { … } static int mxt_init_t7_power_cfg(struct mxt_data *data); /* * mxt_update_cfg - download configuration to chip * * Atmel Raw Config File Format * * The first four lines of the raw config file contain: * 1) Version * 2) Chip ID Information (first 7 bytes of device memory) * 3) Chip Information Block 24-bit CRC Checksum * 4) Chip Configuration 24-bit CRC Checksum * * The rest of the file consists of one line per object instance: * <TYPE> <INSTANCE> <SIZE> <CONTENTS> * * <TYPE> - 2-byte object type as hex * <INSTANCE> - 2-byte object instance number as hex * <SIZE> - 2-byte object size as hex * <CONTENTS> - array of <SIZE> 1-byte hex values */ static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw) { … } static void mxt_free_input_device(struct mxt_data *data) { … } static void mxt_free_object_table(struct mxt_data *data) { … } static int mxt_parse_object_table(struct mxt_data *data, struct mxt_object *object_table) { … } static int mxt_read_info_block(struct mxt_data *data) { … } static int mxt_read_t9_resolution(struct mxt_data *data) { … } static int mxt_read_t100_config(struct mxt_data *data) { … } static int mxt_input_open(struct input_dev *dev); static void mxt_input_close(struct input_dev *dev); static void mxt_set_up_as_touchpad(struct input_dev *input_dev, struct mxt_data *data) { … } static int mxt_initialize_input_device(struct mxt_data *data) { … } static int mxt_configure_objects(struct mxt_data *data, const struct firmware *cfg); static void mxt_config_cb(const struct firmware *cfg, void *ctx) { … } static int mxt_initialize(struct mxt_data *data) { … } static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep) { … } static int mxt_init_t7_power_cfg(struct mxt_data *data) { … } #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 static const struct v4l2_file_operations mxt_video_fops = …; static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x, unsigned int y) { … } static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf) { … } static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode, u16 *outbuf) { … } static int mxt_queue_setup(struct vb2_queue *q, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) { … } static void mxt_buffer_queue(struct vb2_buffer *vb) { … } /* V4L2 structures */ static const struct vb2_ops mxt_queue_ops = …; static const struct vb2_queue mxt_queue = …; static int mxt_vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { … } static int mxt_vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *i) { … } static int mxt_set_input(struct mxt_data *data, unsigned int i) { … } static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i) { … } static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i) { … } static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f) { … } static int mxt_vidioc_enum_fmt(struct file *file, void *priv, struct v4l2_fmtdesc *fmt) { … } static int mxt_vidioc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) { … } static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = …; static const struct video_device mxt_video_device = …; static void mxt_debug_init(struct mxt_data *data) { … } #else static void mxt_debug_init(struct mxt_data *data) { } #endif static int mxt_configure_objects(struct mxt_data *data, const struct firmware *cfg) { … } /* Firmware Version is returned as Major.Minor.Build */ static ssize_t mxt_fw_version_show(struct device *dev, struct device_attribute *attr, char *buf) { … } /* Hardware Version is returned as FamilyID.VariantID */ static ssize_t mxt_hw_version_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t mxt_show_instance(char *buf, int count, struct mxt_object *object, int instance, const u8 *val) { … } static ssize_t mxt_object_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static int mxt_check_firmware_format(struct device *dev, const struct firmware *fw) { … } static int mxt_load_fw(struct device *dev, const char *fn) { … } static ssize_t mxt_update_fw_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); static struct attribute *mxt_attrs[] = …; ATTRIBUTE_GROUPS(…); static void mxt_start(struct mxt_data *data) { … } static void mxt_stop(struct mxt_data *data) { … } static int mxt_input_open(struct input_dev *dev) { … } static void mxt_input_close(struct input_dev *dev) { … } static int mxt_parse_device_properties(struct mxt_data *data) { … } static const struct dmi_system_id chromebook_T9_suspend_dmi[] = …; static int mxt_probe(struct i2c_client *client) { … } static void mxt_remove(struct i2c_client *client) { … } static int mxt_suspend(struct device *dev) { … } static int mxt_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume); static const struct of_device_id mxt_of_match[] = …; MODULE_DEVICE_TABLE(of, mxt_of_match); #ifdef CONFIG_ACPI static const struct acpi_device_id mxt_acpi_id[] = …; MODULE_DEVICE_TABLE(acpi, mxt_acpi_id); #endif static const struct i2c_device_id mxt_id[] = …; MODULE_DEVICE_TABLE(i2c, mxt_id); static struct i2c_driver mxt_driver = …; module_i2c_driver(…) …; /* Module information */ MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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