Input: add driver for Cypress APA I2C Trackpad
This patch introduces a driver for Cypress All Points Addressable I2C Trackpad, including the ones in 2012 Samsung Chromebooks. This device is compatible with MT protocol type B, providing identifiable contacts. Signed-off-by: Dudley Du <dudl@cypress.com> Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Signed-off-by: Benson Leung <bleung@chromium.org> Reviewed-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Benson Leung
Dmitry Torokhov
parent
236d6a77ee
commit
d7e34d12ba
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@ -203,6 +203,18 @@ config MOUSE_BCM5974
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To compile this driver as a module, choose M here: the
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module will be called bcm5974.
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config MOUSE_CYAPA
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tristate "Cypress APA I2C Trackpad support"
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depends on I2C
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help
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This driver adds support for Cypress All Points Addressable (APA)
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I2C Trackpads, including the ones used in 2012 Samsung Chromebooks.
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Say Y here if you have a Cypress APA I2C Trackpad.
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To compile this driver as a module, choose M here: the module will be
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called cyapa.
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config MOUSE_INPORT
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tristate "InPort/MS/ATIXL busmouse"
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depends on ISA
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@ -8,6 +8,7 @@ obj-$(CONFIG_MOUSE_AMIGA) += amimouse.o
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obj-$(CONFIG_MOUSE_APPLETOUCH) += appletouch.o
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obj-$(CONFIG_MOUSE_ATARI) += atarimouse.o
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obj-$(CONFIG_MOUSE_BCM5974) += bcm5974.o
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obj-$(CONFIG_MOUSE_CYAPA) += cyapa.o
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obj-$(CONFIG_MOUSE_GPIO) += gpio_mouse.o
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obj-$(CONFIG_MOUSE_INPORT) += inport.o
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obj-$(CONFIG_MOUSE_LOGIBM) += logibm.o
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@ -0,0 +1,804 @@
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/*
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* Cypress APA trackpad with I2C interface
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*
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* Author: Dudley Du <dudl@cypress.com>
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* Further cleanup and restructuring by:
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* Daniel Kurtz <djkurtz@chromium.org>
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* Benson Leung <bleung@chromium.org>
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*
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* Copyright (C) 2011-2012 Cypress Semiconductor, Inc.
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* Copyright (C) 2011-2012 Google, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/input/mt.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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/* APA trackpad firmware generation */
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#define CYAPA_GEN3 0x03 /* support MT-protocol B with tracking ID. */
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#define CYAPA_NAME "Cypress APA Trackpad (cyapa)"
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/* commands for read/write registers of Cypress trackpad */
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#define CYAPA_CMD_SOFT_RESET 0x00
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#define CYAPA_CMD_POWER_MODE 0x01
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#define CYAPA_CMD_DEV_STATUS 0x02
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#define CYAPA_CMD_GROUP_DATA 0x03
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#define CYAPA_CMD_GROUP_CMD 0x04
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#define CYAPA_CMD_GROUP_QUERY 0x05
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#define CYAPA_CMD_BL_STATUS 0x06
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#define CYAPA_CMD_BL_HEAD 0x07
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#define CYAPA_CMD_BL_CMD 0x08
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#define CYAPA_CMD_BL_DATA 0x09
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#define CYAPA_CMD_BL_ALL 0x0a
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#define CYAPA_CMD_BLK_PRODUCT_ID 0x0b
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#define CYAPA_CMD_BLK_HEAD 0x0c
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/* report data start reg offset address. */
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#define DATA_REG_START_OFFSET 0x0000
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#define BL_HEAD_OFFSET 0x00
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#define BL_DATA_OFFSET 0x10
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/*
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* Operational Device Status Register
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*
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* bit 7: Valid interrupt source
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* bit 6 - 4: Reserved
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* bit 3 - 2: Power status
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* bit 1 - 0: Device status
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*/
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#define REG_OP_STATUS 0x00
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#define OP_STATUS_SRC 0x80
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#define OP_STATUS_POWER 0x0c
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#define OP_STATUS_DEV 0x03
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#define OP_STATUS_MASK (OP_STATUS_SRC | OP_STATUS_POWER | OP_STATUS_DEV)
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/*
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* Operational Finger Count/Button Flags Register
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*
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* bit 7 - 4: Number of touched finger
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* bit 3: Valid data
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* bit 2: Middle Physical Button
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* bit 1: Right Physical Button
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* bit 0: Left physical Button
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*/
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#define REG_OP_DATA1 0x01
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#define OP_DATA_VALID 0x08
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#define OP_DATA_MIDDLE_BTN 0x04
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#define OP_DATA_RIGHT_BTN 0x02
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#define OP_DATA_LEFT_BTN 0x01
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#define OP_DATA_BTN_MASK (OP_DATA_MIDDLE_BTN | OP_DATA_RIGHT_BTN | \
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OP_DATA_LEFT_BTN)
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/*
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* Bootloader Status Register
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*
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* bit 7: Busy
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* bit 6 - 5: Reserved
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* bit 4: Bootloader running
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* bit 3 - 1: Reserved
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* bit 0: Checksum valid
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*/
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#define REG_BL_STATUS 0x01
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#define BL_STATUS_BUSY 0x80
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#define BL_STATUS_RUNNING 0x10
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#define BL_STATUS_DATA_VALID 0x08
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#define BL_STATUS_CSUM_VALID 0x01
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/*
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* Bootloader Error Register
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*
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* bit 7: Invalid
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* bit 6: Invalid security key
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* bit 5: Bootloading
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* bit 4: Command checksum
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* bit 3: Flash protection error
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* bit 2: Flash checksum error
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* bit 1 - 0: Reserved
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*/
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#define REG_BL_ERROR 0x02
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#define BL_ERROR_INVALID 0x80
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#define BL_ERROR_INVALID_KEY 0x40
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#define BL_ERROR_BOOTLOADING 0x20
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#define BL_ERROR_CMD_CSUM 0x10
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#define BL_ERROR_FLASH_PROT 0x08
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#define BL_ERROR_FLASH_CSUM 0x04
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#define BL_STATUS_SIZE 3 /* length of bootloader status registers */
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#define BLK_HEAD_BYTES 32
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#define PRODUCT_ID_SIZE 16
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#define QUERY_DATA_SIZE 27
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#define REG_PROTOCOL_GEN_QUERY_OFFSET 20
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#define REG_OFFSET_DATA_BASE 0x0000
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#define REG_OFFSET_COMMAND_BASE 0x0028
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#define REG_OFFSET_QUERY_BASE 0x002a
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#define CAPABILITY_LEFT_BTN_MASK (0x01 << 3)
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#define CAPABILITY_RIGHT_BTN_MASK (0x01 << 4)
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#define CAPABILITY_MIDDLE_BTN_MASK (0x01 << 5)
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#define CAPABILITY_BTN_MASK (CAPABILITY_LEFT_BTN_MASK | \
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CAPABILITY_RIGHT_BTN_MASK | \
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CAPABILITY_MIDDLE_BTN_MASK)
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#define CYAPA_OFFSET_SOFT_RESET REG_OFFSET_COMMAND_BASE
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#define REG_OFFSET_POWER_MODE (REG_OFFSET_COMMAND_BASE + 1)
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#define PWR_MODE_MASK 0xfc
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#define PWR_MODE_FULL_ACTIVE (0x3f << 2)
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#define PWR_MODE_IDLE (0x05 << 2) /* default sleep time is 50 ms. */
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#define PWR_MODE_OFF (0x00 << 2)
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#define PWR_STATUS_MASK 0x0c
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#define PWR_STATUS_ACTIVE (0x03 << 2)
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#define PWR_STATUS_IDLE (0x02 << 2)
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#define PWR_STATUS_OFF (0x00 << 2)
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/*
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* CYAPA trackpad device states.
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* Used in register 0x00, bit1-0, DeviceStatus field.
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* Other values indicate device is in an abnormal state and must be reset.
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*/
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#define CYAPA_DEV_NORMAL 0x03
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#define CYAPA_DEV_BUSY 0x01
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enum cyapa_state {
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CYAPA_STATE_OP,
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CYAPA_STATE_BL_IDLE,
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CYAPA_STATE_BL_ACTIVE,
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CYAPA_STATE_BL_BUSY,
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CYAPA_STATE_NO_DEVICE,
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};
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struct cyapa_touch {
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/*
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* high bits or x/y position value
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* bit 7 - 4: high 4 bits of x position value
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* bit 3 - 0: high 4 bits of y position value
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*/
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u8 xy_hi;
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u8 x_lo; /* low 8 bits of x position value. */
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u8 y_lo; /* low 8 bits of y position value. */
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u8 pressure;
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/* id range is 1 - 15. It is incremented with every new touch. */
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u8 id;
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} __packed;
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/* The touch.id is used as the MT slot id, thus max MT slot is 15 */
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#define CYAPA_MAX_MT_SLOTS 15
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struct cyapa_reg_data {
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/*
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* bit 0 - 1: device status
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* bit 3 - 2: power mode
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* bit 6 - 4: reserved
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* bit 7: interrupt valid bit
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*/
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u8 device_status;
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/*
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* bit 7 - 4: number of fingers currently touching pad
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* bit 3: valid data check bit
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* bit 2: middle mechanism button state if exists
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* bit 1: right mechanism button state if exists
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* bit 0: left mechanism button state if exists
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*/
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u8 finger_btn;
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/* CYAPA reports up to 5 touches per packet. */
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struct cyapa_touch touches[5];
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} __packed;
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/* The main device structure */
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struct cyapa {
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enum cyapa_state state;
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struct i2c_client *client;
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struct input_dev *input;
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char phys[32]; /* device physical location */
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int irq;
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bool irq_wake; /* irq wake is enabled */
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/* read from query data region. */
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char product_id[16];
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u8 btn_capability;
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u8 gen;
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int max_abs_x;
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int max_abs_y;
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int physical_size_x;
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int physical_size_y;
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};
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static const u8 bl_deactivate[] = { 0x00, 0xff, 0x3b, 0x00, 0x01, 0x02, 0x03,
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0x04, 0x05, 0x06, 0x07 };
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static const u8 bl_exit[] = { 0x00, 0xff, 0xa5, 0x00, 0x01, 0x02, 0x03, 0x04,
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0x05, 0x06, 0x07 };
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struct cyapa_cmd_len {
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u8 cmd;
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u8 len;
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};
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static const struct cyapa_cmd_len cyapa_i2c_cmds[] = {
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{ CYAPA_OFFSET_SOFT_RESET, 1 },
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{ REG_OFFSET_COMMAND_BASE + 1, 1 },
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{ REG_OFFSET_DATA_BASE, 1 },
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{ REG_OFFSET_DATA_BASE, sizeof(struct cyapa_reg_data) },
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{ REG_OFFSET_COMMAND_BASE, 0 },
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{ REG_OFFSET_QUERY_BASE, QUERY_DATA_SIZE },
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{ BL_HEAD_OFFSET, 3 },
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{ BL_HEAD_OFFSET, 16 },
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{ BL_HEAD_OFFSET, 16 },
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{ BL_DATA_OFFSET, 16 },
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{ BL_HEAD_OFFSET, 32 },
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{ REG_OFFSET_QUERY_BASE, PRODUCT_ID_SIZE },
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{ REG_OFFSET_DATA_BASE, 32 }
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};
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static ssize_t cyapa_i2c_reg_read_block(struct cyapa *cyapa, u8 reg, size_t len,
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u8 *values)
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{
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return i2c_smbus_read_i2c_block_data(cyapa->client, reg, len, values);
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}
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static ssize_t cyapa_i2c_reg_write_block(struct cyapa *cyapa, u8 reg,
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size_t len, const u8 *values)
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{
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return i2c_smbus_write_i2c_block_data(cyapa->client, reg, len, values);
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}
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static s32 cyapa_read_byte(struct cyapa *cyapa, u8 cmd_idx)
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{
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u8 cmd = cyapa_i2c_cmds[cmd_idx].cmd;
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return i2c_smbus_read_byte_data(cyapa->client, cmd);
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}
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static s32 cyapa_write_byte(struct cyapa *cyapa, u8 cmd_idx, u8 value)
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{
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u8 cmd = cyapa_i2c_cmds[cmd_idx].cmd;
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return i2c_smbus_write_byte_data(cyapa->client, cmd, value);
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}
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static ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values)
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{
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u8 cmd = cyapa_i2c_cmds[cmd_idx].cmd;
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size_t len = cyapa_i2c_cmds[cmd_idx].len;
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return cyapa_i2c_reg_read_block(cyapa, cmd, len, values);
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}
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/*
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* Query device for its current operating state.
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*
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*/
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static int cyapa_get_state(struct cyapa *cyapa)
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{
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int ret;
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u8 status[BL_STATUS_SIZE];
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cyapa->state = CYAPA_STATE_NO_DEVICE;
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/*
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* Get trackpad status by reading 3 registers starting from 0.
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* If the device is in the bootloader, this will be BL_HEAD.
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* If the device is in operation mode, this will be the DATA regs.
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*
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*/
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ret = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE,
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status);
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if (ret != BL_STATUS_SIZE)
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goto error;
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if ((status[REG_OP_STATUS] & OP_STATUS_SRC) == OP_STATUS_SRC) {
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switch (status[REG_OP_STATUS] & OP_STATUS_DEV) {
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case CYAPA_DEV_NORMAL:
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case CYAPA_DEV_BUSY:
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cyapa->state = CYAPA_STATE_OP;
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break;
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default:
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ret = -EAGAIN;
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goto error;
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}
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} else {
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if (status[REG_BL_STATUS] & BL_STATUS_BUSY)
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cyapa->state = CYAPA_STATE_BL_BUSY;
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else if (status[REG_BL_ERROR] & BL_ERROR_BOOTLOADING)
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cyapa->state = CYAPA_STATE_BL_ACTIVE;
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else
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cyapa->state = CYAPA_STATE_BL_IDLE;
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}
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return 0;
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error:
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return (ret < 0) ? ret : -EAGAIN;
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}
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/*
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* Poll device for its status in a loop, waiting up to timeout for a response.
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*
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* When the device switches state, it usually takes ~300 ms.
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* However, when running a new firmware image, the device must calibrate its
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* sensors, which can take as long as 2 seconds.
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*
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* Note: The timeout has granularity of the polling rate, which is 100 ms.
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*
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* Returns:
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* 0 when the device eventually responds with a valid non-busy state.
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* -ETIMEDOUT if device never responds (too many -EAGAIN)
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* < 0 other errors
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*/
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static int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout)
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{
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int ret;
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int tries = timeout / 100;
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ret = cyapa_get_state(cyapa);
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while ((ret || cyapa->state >= CYAPA_STATE_BL_BUSY) && tries--) {
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msleep(100);
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ret = cyapa_get_state(cyapa);
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}
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return (ret == -EAGAIN || ret == -ETIMEDOUT) ? -ETIMEDOUT : ret;
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}
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static int cyapa_bl_deactivate(struct cyapa *cyapa)
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{
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int ret;
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ret = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_deactivate),
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bl_deactivate);
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if (ret < 0)
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return ret;
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/* wait for bootloader to switch to idle state; should take < 100ms */
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msleep(100);
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ret = cyapa_poll_state(cyapa, 500);
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if (ret < 0)
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return ret;
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if (cyapa->state != CYAPA_STATE_BL_IDLE)
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return -EAGAIN;
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return 0;
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}
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/*
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* Exit bootloader
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*
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* Send bl_exit command, then wait 50 - 100 ms to let device transition to
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* operational mode. If this is the first time the device's firmware is
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* running, it can take up to 2 seconds to calibrate its sensors. So, poll
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* the device's new state for up to 2 seconds.
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*
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* Returns:
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* -EIO failure while reading from device
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* -EAGAIN device is stuck in bootloader, b/c it has invalid firmware
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* 0 device is supported and in operational mode
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*/
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static int cyapa_bl_exit(struct cyapa *cyapa)
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{
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int ret;
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ret = cyapa_i2c_reg_write_block(cyapa, 0, sizeof(bl_exit), bl_exit);
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if (ret < 0)
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return ret;
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/*
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* Wait for bootloader to exit, and operation mode to start.
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* Normally, this takes at least 50 ms.
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*/
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usleep_range(50000, 100000);
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/*
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* In addition, when a device boots for the first time after being
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* updated to new firmware, it must first calibrate its sensors, which
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* can take up to an additional 2 seconds.
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*/
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ret = cyapa_poll_state(cyapa, 2000);
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if (ret < 0)
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return ret;
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if (cyapa->state != CYAPA_STATE_OP)
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return -EAGAIN;
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return 0;
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}
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/*
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* Set device power mode
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*
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*/
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static int cyapa_set_power_mode(struct cyapa *cyapa, u8 power_mode)
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{
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struct device *dev = &cyapa->client->dev;
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int ret;
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u8 power;
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|
||||
if (cyapa->state != CYAPA_STATE_OP)
|
||||
return 0;
|
||||
|
||||
ret = cyapa_read_byte(cyapa, CYAPA_CMD_POWER_MODE);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
power = ret & ~PWR_MODE_MASK;
|
||||
power |= power_mode & PWR_MODE_MASK;
|
||||
ret = cyapa_write_byte(cyapa, CYAPA_CMD_POWER_MODE, power);
|
||||
if (ret < 0)
|
||||
dev_err(dev, "failed to set power_mode 0x%02x err = %d\n",
|
||||
power_mode, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int cyapa_get_query_data(struct cyapa *cyapa)
|
||||
{
|
||||
u8 query_data[QUERY_DATA_SIZE];
|
||||
int ret;
|
||||
|
||||
if (cyapa->state != CYAPA_STATE_OP)
|
||||
return -EBUSY;
|
||||
|
||||
ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_QUERY, query_data);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (ret != QUERY_DATA_SIZE)
|
||||
return -EIO;
|
||||
|
||||
memcpy(&cyapa->product_id[0], &query_data[0], 5);
|
||||
cyapa->product_id[5] = '-';
|
||||
memcpy(&cyapa->product_id[6], &query_data[5], 6);
|
||||
cyapa->product_id[12] = '-';
|
||||
memcpy(&cyapa->product_id[13], &query_data[11], 2);
|
||||
cyapa->product_id[15] = '\0';
|
||||
|
||||
cyapa->btn_capability = query_data[19] & CAPABILITY_BTN_MASK;
|
||||
|
||||
cyapa->gen = query_data[20] & 0x0f;
|
||||
|
||||
cyapa->max_abs_x = ((query_data[21] & 0xf0) << 4) | query_data[22];
|
||||
cyapa->max_abs_y = ((query_data[21] & 0x0f) << 8) | query_data[23];
|
||||
|
||||
cyapa->physical_size_x =
|
||||
((query_data[24] & 0xf0) << 4) | query_data[25];
|
||||
cyapa->physical_size_y =
|
||||
((query_data[24] & 0x0f) << 8) | query_data[26];
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Check if device is operational.
|
||||
*
|
||||
* An operational device is responding, has exited bootloader, and has
|
||||
* firmware supported by this driver.
|
||||
*
|
||||
* Returns:
|
||||
* -EBUSY no device or in bootloader
|
||||
* -EIO failure while reading from device
|
||||
* -EAGAIN device is still in bootloader
|
||||
* if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware
|
||||
* -EINVAL device is in operational mode, but not supported by this driver
|
||||
* 0 device is supported
|
||||
*/
|
||||
static int cyapa_check_is_operational(struct cyapa *cyapa)
|
||||
{
|
||||
struct device *dev = &cyapa->client->dev;
|
||||
static const char unique_str[] = "CYTRA";
|
||||
int ret;
|
||||
|
||||
ret = cyapa_poll_state(cyapa, 2000);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
switch (cyapa->state) {
|
||||
case CYAPA_STATE_BL_ACTIVE:
|
||||
ret = cyapa_bl_deactivate(cyapa);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* Fallthrough state */
|
||||
case CYAPA_STATE_BL_IDLE:
|
||||
ret = cyapa_bl_exit(cyapa);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* Fallthrough state */
|
||||
case CYAPA_STATE_OP:
|
||||
ret = cyapa_get_query_data(cyapa);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* only support firmware protocol gen3 */
|
||||
if (cyapa->gen != CYAPA_GEN3) {
|
||||
dev_err(dev, "unsupported protocol version (%d)",
|
||||
cyapa->gen);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* only support product ID starting with CYTRA */
|
||||
if (memcmp(cyapa->product_id, unique_str,
|
||||
sizeof(unique_str) - 1) != 0) {
|
||||
dev_err(dev, "unsupported product ID (%s)\n",
|
||||
cyapa->product_id);
|
||||
return -EINVAL;
|
||||
}
|
||||
return 0;
|
||||
|
||||
default:
|
||||
return -EIO;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static irqreturn_t cyapa_irq(int irq, void *dev_id)
|
||||
{
|
||||
struct cyapa *cyapa = dev_id;
|
||||
struct device *dev = &cyapa->client->dev;
|
||||
struct input_dev *input = cyapa->input;
|
||||
struct cyapa_reg_data data;
|
||||
int i;
|
||||
int ret;
|
||||
int num_fingers;
|
||||
|
||||
if (device_may_wakeup(dev))
|
||||
pm_wakeup_event(dev, 0);
|
||||
|
||||
ret = cyapa_read_block(cyapa, CYAPA_CMD_GROUP_DATA, (u8 *)&data);
|
||||
if (ret != sizeof(data))
|
||||
goto out;
|
||||
|
||||
if ((data.device_status & OP_STATUS_SRC) != OP_STATUS_SRC ||
|
||||
(data.device_status & OP_STATUS_DEV) != CYAPA_DEV_NORMAL ||
|
||||
(data.finger_btn & OP_DATA_VALID) != OP_DATA_VALID) {
|
||||
goto out;
|
||||
}
|
||||
|
||||
num_fingers = (data.finger_btn >> 4) & 0x0f;
|
||||
for (i = 0; i < num_fingers; i++) {
|
||||
const struct cyapa_touch *touch = &data.touches[i];
|
||||
/* Note: touch->id range is 1 to 15; slots are 0 to 14. */
|
||||
int slot = touch->id - 1;
|
||||
|
||||
input_mt_slot(input, slot);
|
||||
input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
|
||||
input_report_abs(input, ABS_MT_POSITION_X,
|
||||
((touch->xy_hi & 0xf0) << 4) | touch->x_lo);
|
||||
input_report_abs(input, ABS_MT_POSITION_Y,
|
||||
((touch->xy_hi & 0x0f) << 8) | touch->y_lo);
|
||||
input_report_abs(input, ABS_MT_PRESSURE, touch->pressure);
|
||||
}
|
||||
|
||||
input_mt_sync_frame(input);
|
||||
|
||||
if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK)
|
||||
input_report_key(input, BTN_LEFT,
|
||||
data.finger_btn & OP_DATA_LEFT_BTN);
|
||||
|
||||
if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK)
|
||||
input_report_key(input, BTN_MIDDLE,
|
||||
data.finger_btn & OP_DATA_MIDDLE_BTN);
|
||||
|
||||
if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK)
|
||||
input_report_key(input, BTN_RIGHT,
|
||||
data.finger_btn & OP_DATA_RIGHT_BTN);
|
||||
|
||||
input_sync(input);
|
||||
|
||||
out:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int cyapa_create_input_dev(struct cyapa *cyapa)
|
||||
{
|
||||
struct device *dev = &cyapa->client->dev;
|
||||
int ret;
|
||||
struct input_dev *input;
|
||||
|
||||
if (!cyapa->physical_size_x || !cyapa->physical_size_y)
|
||||
return -EINVAL;
|
||||
|
||||
input = cyapa->input = input_allocate_device();
|
||||
if (!input) {
|
||||
dev_err(dev, "allocate memory for input device failed\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
input->name = CYAPA_NAME;
|
||||
input->phys = cyapa->phys;
|
||||
input->id.bustype = BUS_I2C;
|
||||
input->id.version = 1;
|
||||
input->id.product = 0; /* means any product in eventcomm. */
|
||||
input->dev.parent = &cyapa->client->dev;
|
||||
|
||||
input_set_drvdata(input, cyapa);
|
||||
|
||||
__set_bit(EV_ABS, input->evbit);
|
||||
|
||||
/* finger position */
|
||||
input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0,
|
||||
0);
|
||||
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0,
|
||||
0);
|
||||
input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0);
|
||||
|
||||
input_abs_set_res(input, ABS_MT_POSITION_X,
|
||||
cyapa->max_abs_x / cyapa->physical_size_x);
|
||||
input_abs_set_res(input, ABS_MT_POSITION_Y,
|
||||
cyapa->max_abs_y / cyapa->physical_size_y);
|
||||
|
||||
if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK)
|
||||
__set_bit(BTN_LEFT, input->keybit);
|
||||
if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK)
|
||||
__set_bit(BTN_MIDDLE, input->keybit);
|
||||
if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK)
|
||||
__set_bit(BTN_RIGHT, input->keybit);
|
||||
|
||||
if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK)
|
||||
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
|
||||
|
||||
/* handle pointer emulation and unused slots in core */
|
||||
ret = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS,
|
||||
INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED);
|
||||
if (ret) {
|
||||
dev_err(dev, "allocate memory for MT slots failed, %d\n", ret);
|
||||
goto err_free_device;
|
||||
}
|
||||
|
||||
/* Register the device in input subsystem */
|
||||
ret = input_register_device(input);
|
||||
if (ret) {
|
||||
dev_err(dev, "input device register failed, %d\n", ret);
|
||||
goto err_free_device;
|
||||
}
|
||||
return 0;
|
||||
|
||||
err_free_device:
|
||||
input_free_device(input);
|
||||
cyapa->input = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int cyapa_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *dev_id)
|
||||
{
|
||||
int ret;
|
||||
struct cyapa *cyapa;
|
||||
struct device *dev = &client->dev;
|
||||
|
||||
cyapa = kzalloc(sizeof(struct cyapa), GFP_KERNEL);
|
||||
if (!cyapa) {
|
||||
dev_err(dev, "allocate memory for cyapa failed\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
cyapa->gen = CYAPA_GEN3;
|
||||
cyapa->client = client;
|
||||
i2c_set_clientdata(client, cyapa);
|
||||
sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr,
|
||||
client->addr);
|
||||
|
||||
cyapa->state = CYAPA_STATE_NO_DEVICE;
|
||||
ret = cyapa_check_is_operational(cyapa);
|
||||
if (ret) {
|
||||
dev_err(dev, "device not operational, %d\n", ret);
|
||||
goto err_mem_free;
|
||||
}
|
||||
|
||||
ret = cyapa_create_input_dev(cyapa);
|
||||
if (ret) {
|
||||
dev_err(dev, "create input_dev instance failed, %d\n", ret);
|
||||
goto err_mem_free;
|
||||
}
|
||||
|
||||
ret = cyapa_set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE);
|
||||
if (ret) {
|
||||
dev_err(dev, "set active power failed, %d\n", ret);
|
||||
goto err_unregister_device;
|
||||
}
|
||||
|
||||
cyapa->irq = client->irq;
|
||||
ret = request_threaded_irq(cyapa->irq,
|
||||
NULL,
|
||||
cyapa_irq,
|
||||
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
||||
"cyapa",
|
||||
cyapa);
|
||||
if (ret) {
|
||||
dev_err(dev, "IRQ request failed: %d\n, ", ret);
|
||||
goto err_unregister_device;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_unregister_device:
|
||||
input_unregister_device(cyapa->input);
|
||||
err_mem_free:
|
||||
kfree(cyapa);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int cyapa_remove(struct i2c_client *client)
|
||||
{
|
||||
struct cyapa *cyapa = i2c_get_clientdata(client);
|
||||
|
||||
free_irq(cyapa->irq, cyapa);
|
||||
input_unregister_device(cyapa->input);
|
||||
cyapa_set_power_mode(cyapa, PWR_MODE_OFF);
|
||||
kfree(cyapa);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int cyapa_suspend(struct device *dev)
|
||||
{
|
||||
int ret;
|
||||
u8 power_mode;
|
||||
struct cyapa *cyapa = dev_get_drvdata(dev);
|
||||
|
||||
disable_irq(cyapa->irq);
|
||||
|
||||
/*
|
||||
* Set trackpad device to idle mode if wakeup is allowed,
|
||||
* otherwise turn off.
|
||||
*/
|
||||
power_mode = device_may_wakeup(dev) ? PWR_MODE_IDLE
|
||||
: PWR_MODE_OFF;
|
||||
ret = cyapa_set_power_mode(cyapa, power_mode);
|
||||
if (ret < 0)
|
||||
dev_err(dev, "set power mode failed, %d\n", ret);
|
||||
|
||||
if (device_may_wakeup(dev))
|
||||
cyapa->irq_wake = (enable_irq_wake(cyapa->irq) == 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cyapa_resume(struct device *dev)
|
||||
{
|
||||
int ret;
|
||||
struct cyapa *cyapa = dev_get_drvdata(dev);
|
||||
|
||||
if (device_may_wakeup(dev) && cyapa->irq_wake)
|
||||
disable_irq_wake(cyapa->irq);
|
||||
|
||||
ret = cyapa_set_power_mode(cyapa, PWR_MODE_FULL_ACTIVE);
|
||||
if (ret)
|
||||
dev_warn(dev, "resume active power failed, %d\n", ret);
|
||||
|
||||
enable_irq(cyapa->irq);
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_PM_SLEEP */
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(cyapa_pm_ops, cyapa_suspend, cyapa_resume);
|
||||
|
||||
static const struct i2c_device_id cyapa_id_table[] = {
|
||||
{ "cyapa", 0 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, cyapa_id_table);
|
||||
|
||||
static struct i2c_driver cyapa_driver = {
|
||||
.driver = {
|
||||
.name = "cyapa",
|
||||
.owner = THIS_MODULE,
|
||||
.pm = &cyapa_pm_ops,
|
||||
},
|
||||
|
||||
.probe = cyapa_probe,
|
||||
.remove = cyapa_remove,
|
||||
.id_table = cyapa_id_table,
|
||||
};
|
||||
|
||||
module_i2c_driver(cyapa_driver);
|
||||
|
||||
MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver");
|
||||
MODULE_AUTHOR("Dudley Du <dudl@cypress.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue