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* Header file for:
* Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
* For use with Cypress Txx3xx parts.
* Supported parts include:
* CY8CTST341
* CY8CTMA340
* Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
* Copyright (C) 2012 Javier Martinez Canillas <>
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2, and only version 2, as published by the
* Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* Contact Cypress Semiconductor at <>
#ifndef __CYTTSP_CORE_H__
#define __CYTTSP_CORE_H__
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/input/cyttsp.h>
#define CY_NUM_RETRY 16 /* max number of retries for read ops */
struct cyttsp_tch {
__be16 x, y;
u8 z;
} __packed;
/* TrueTouch Standard Product Gen3 interface definition */
struct cyttsp_xydata {
u8 hst_mode;
u8 tt_mode;
u8 tt_stat;
struct cyttsp_tch tch1;
u8 touch12_id;
struct cyttsp_tch tch2;
u8 gest_cnt;
u8 gest_id;
struct cyttsp_tch tch3;
u8 touch34_id;
struct cyttsp_tch tch4;
u8 tt_undef[3];
u8 act_dist;
u8 tt_reserved;
} __packed;
/* TTSP System Information interface definition */
struct cyttsp_sysinfo_data {
u8 hst_mode;
u8 mfg_stat;
u8 mfg_cmd;
u8 cid[3];
u8 tt_undef1;
u8 uid[8];
u8 bl_verh;
u8 bl_verl;
u8 tts_verh;
u8 tts_verl;
u8 app_idh;
u8 app_idl;
u8 app_verh;
u8 app_verl;
u8 tt_undef[5];
u8 scn_typ;
u8 act_intrvl;
u8 tch_tmout;
u8 lp_intrvl;
/* TTSP Bootloader Register Map interface definition */
#define CY_BL_CHKSUM_OK 0x01
struct cyttsp_bootloader_data {
u8 bl_file;
u8 bl_status;
u8 bl_error;
u8 blver_hi;
u8 blver_lo;
u8 bld_blver_hi;
u8 bld_blver_lo;
u8 ttspver_hi;
u8 ttspver_lo;
u8 appid_hi;
u8 appid_lo;
u8 appver_hi;
u8 appver_lo;
u8 cid_0;
u8 cid_1;
u8 cid_2;
struct cyttsp;
struct cyttsp_bus_ops {
u16 bustype;
int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
const void *values);
int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
void *values);
enum cyttsp_state {
struct cyttsp {
struct device *dev;
int irq;
struct input_dev *input;
char phys[32];
const struct cyttsp_bus_ops *bus_ops;
struct cyttsp_bootloader_data bl_data;
struct cyttsp_sysinfo_data sysinfo_data;
struct cyttsp_xydata xy_data;
struct completion bl_ready;
enum cyttsp_state state;
bool suspended;
struct gpio_desc *reset_gpio;
bool use_hndshk;
u8 act_dist;
u8 act_intrvl;
u8 tch_tmout;
u8 lp_intrvl;
u8 *bl_keys;
u8 xfer_buf[] ____cacheline_aligned;
struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
struct device *dev, int irq, size_t xfer_buf_size);
int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
u8 length, const void *values);
int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
u8 length, void *values);
extern const struct dev_pm_ops cyttsp_pm_ops;
#endif /* __CYTTSP_CORE_H__ */