linux-imx

/*

 * Cypress APA trackpad with I2C interface

 *

 * Author: Dudley Du <dudl@cypress.com>

 *

 * Copyright (C) 2014-2015 Cypress Semiconductor, Inc.

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file COPYING in the main directory of this archive for

 * more details.

 */

​

#ifndef _CYAPA_H

#define _CYAPA_H

​

#include <linux/firmware.h>

​

/* APA trackpad firmware generation number. */

#define CYAPA_GEN_UNKNOWN   0x00   /* unknown protocol. */

#define CYAPA_GEN3   0x03   /* support MT-protocol B with tracking ID. */

#define CYAPA_GEN5   0x05   /* support TrueTouch GEN5 trackpad device. */

#define CYAPA_GEN6   0x06   /* support TrueTouch GEN6 trackpad device. */

​

#define CYAPA_NAME   "Cypress APA Trackpad (cyapa)"

​

/*

 * Macros for SMBus communication

 */

#define SMBUS_READ  0x01

#define SMBUS_WRITE 0x00

#define SMBUS_ENCODE_IDX(cmd, idx) ((cmd) | (((idx) & 0x03) << 1))

#define SMBUS_ENCODE_RW(cmd, rw) ((cmd) | ((rw) & 0x01))

#define SMBUS_BYTE_BLOCK_CMD_MASK 0x80

#define SMBUS_GROUP_BLOCK_CMD_MASK 0x40

​

/* Commands for read/write registers of Cypress trackpad */

#define CYAPA_CMD_SOFT_RESET       0x00

#define CYAPA_CMD_POWER_MODE       0x01

#define CYAPA_CMD_DEV_STATUS       0x02

#define CYAPA_CMD_GROUP_DATA       0x03

#define CYAPA_CMD_GROUP_CMD        0x04

#define CYAPA_CMD_GROUP_QUERY      0x05

#define CYAPA_CMD_BL_STATUS        0x06

#define CYAPA_CMD_BL_HEAD          0x07

#define CYAPA_CMD_BL_CMD           0x08

#define CYAPA_CMD_BL_DATA          0x09

#define CYAPA_CMD_BL_ALL           0x0a

#define CYAPA_CMD_BLK_PRODUCT_ID   0x0b

#define CYAPA_CMD_BLK_HEAD         0x0c

#define CYAPA_CMD_MAX_BASELINE     0x0d

#define CYAPA_CMD_MIN_BASELINE     0x0e

​

#define BL_HEAD_OFFSET 0x00

#define BL_DATA_OFFSET 0x10

​

#define BL_STATUS_SIZE  3  /* Length of gen3 bootloader status registers */

#define CYAPA_REG_MAP_SIZE  256

​

/*

 * Gen3 Operational Device Status Register

 *

 * bit 7: Valid interrupt source

 * bit 6 - 4: Reserved