drivers/input/touchscreen/cyttsp_core.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Header file for:
   4  * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
   5  * For use with Cypress Txx3xx parts.
   6  * Supported parts include:
   7  * CY8CTST341
   8  * CY8CTMA340
   9  *
  10  * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
  11  * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
  12  *
  13  * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
  14  */
  15
  16
  17 #ifndef __CYTTSP_CORE_H__
  18 #define __CYTTSP_CORE_H__
  19
  20 #include <linux/kernel.h>
  21 #include <linux/err.h>
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/device.h>
  25 #include <linux/input/cyttsp.h>
  26
  27 #define CY_NUM_RETRY            16 /* max number of retries for read ops */
  28
  29 struct cyttsp_tch {
  30         __be16 x, y;
  31         u8 z;
  32 } __packed;
  33
  34 /* TrueTouch Standard Product Gen3 interface definition */
  35 struct cyttsp_xydata {
  36         u8 hst_mode;
  37         u8 tt_mode;
  38         u8 tt_stat;
  39         struct cyttsp_tch tch1;
  40         u8 touch12_id;
  41         struct cyttsp_tch tch2;
  42         u8 gest_cnt;
  43         u8 gest_id;
  44         struct cyttsp_tch tch3;
  45         u8 touch34_id;
  46         struct cyttsp_tch tch4;
  47         u8 tt_undef[3];
  48         u8 act_dist;
  49         u8 tt_reserved;
  50 } __packed;
  51
  52
  53 /* TTSP System Information interface definition */
  54 struct cyttsp_sysinfo_data {
  55         u8 hst_mode;
  56         u8 mfg_stat;
  57         u8 mfg_cmd;
  58         u8 cid[3];
  59         u8 tt_undef1;
  60         u8 uid[8];
  61         u8 bl_verh;
  62         u8 bl_verl;
  63         u8 tts_verh;
  64         u8 tts_verl;
  65         u8 app_idh;
  66         u8 app_idl;
  67         u8 app_verh;
  68         u8 app_verl;
  69         u8 tt_undef[5];
  70         u8 scn_typ;
  71         u8 act_intrvl;
  72         u8 tch_tmout;
  73         u8 lp_intrvl;
  74 };
  75
  76 /* TTSP Bootloader Register Map interface definition */
  77 #define CY_BL_CHKSUM_OK 0x01
  78 struct cyttsp_bootloader_data {
  79         u8 bl_file;
  80         u8 bl_status;
  81         u8 bl_error;
  82         u8 blver_hi;
  83         u8 blver_lo;
  84         u8 bld_blver_hi;
  85         u8 bld_blver_lo;
  86         u8 ttspver_hi;
  87         u8 ttspver_lo;
  88         u8 appid_hi;
  89         u8 appid_lo;
  90         u8 appver_hi;
  91         u8 appver_lo;
  92         u8 cid_0;
  93         u8 cid_1;
  94         u8 cid_2;
  95 };
  96
  97 struct cyttsp;
  98
  99 struct cyttsp_bus_ops {
 100         u16 bustype;
 101         int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
 102                         const void *values);
 103         int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
 104                         void *values);
 105 };
 106
 107 enum cyttsp_state {
 108         CY_IDLE_STATE,
 109         CY_ACTIVE_STATE,
 110         CY_BL_STATE,
 111 };
 112
 113 struct cyttsp {
 114         struct device *dev;
 115         int irq;
 116         struct input_dev *input;
 117         char phys[32];
 118         const struct cyttsp_bus_ops *bus_ops;
 119         struct cyttsp_bootloader_data bl_data;
 120         struct cyttsp_sysinfo_data sysinfo_data;
 121         struct cyttsp_xydata xy_data;
 122         struct completion bl_ready;
 123         enum cyttsp_state state;
 124         bool suspended;
 125
 126         struct gpio_desc *reset_gpio;
 127         bool use_hndshk;
 128         u8 act_dist;
 129         u8 act_intrvl;
 130         u8 tch_tmout;
 131         u8 lp_intrvl;
 132         u8 *bl_keys;
 133
 134         u8 xfer_buf[] ____cacheline_aligned;
 135 };
 136
 137 struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 138                             struct device *dev, int irq, size_t xfer_buf_size);
 139
 140 int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
 141                 u8 length, const void *values);
 142 int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
 143                 u8 length, void *values);
 144 extern const struct dev_pm_ops cyttsp_pm_ops;
 145
 146 #endif /* __CYTTSP_CORE_H__ */