drivers/input/touchscreen/cyttsp_core.h

   1 /*
   2  * Header file for:
   3  * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
   4  * For use with Cypress Txx3xx parts.
   5  * Supported parts include:
   6  * CY8CTST341
   7  * CY8CTMA340
   8  *
   9  * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
  10  * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * version 2, and only version 2, as published by the
  15  * Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License along
  23  * with this program; if not, write to the Free Software Foundation, Inc.,
  24  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  25  *
  26  * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
  27  *
  28  */
  29
  30
  31 #ifndef __CYTTSP_CORE_H__
  32 #define __CYTTSP_CORE_H__
  33
  34 #include <linux/kernel.h>
  35 #include <linux/err.h>
  36 #include <linux/module.h>
  37 #include <linux/types.h>
  38 #include <linux/device.h>
  39 #include <linux/input/cyttsp.h>
  40
  41 #define CY_NUM_RETRY            16 /* max number of retries for read ops */
  42
  43 struct cyttsp_tch {
  44         __be16 x, y;
  45         u8 z;
  46 } __packed;
  47
  48 /* TrueTouch Standard Product Gen3 interface definition */
  49 struct cyttsp_xydata {
  50         u8 hst_mode;
  51         u8 tt_mode;
  52         u8 tt_stat;
  53         struct cyttsp_tch tch1;
  54         u8 touch12_id;
  55         struct cyttsp_tch tch2;
  56         u8 gest_cnt;
  57         u8 gest_id;
  58         struct cyttsp_tch tch3;
  59         u8 touch34_id;
  60         struct cyttsp_tch tch4;
  61         u8 tt_undef[3];
  62         u8 act_dist;
  63         u8 tt_reserved;
  64 } __packed;
  65
  66
  67 /* TTSP System Information interface definition */
  68 struct cyttsp_sysinfo_data {
  69         u8 hst_mode;
  70         u8 mfg_stat;
  71         u8 mfg_cmd;
  72         u8 cid[3];
  73         u8 tt_undef1;
  74         u8 uid[8];
  75         u8 bl_verh;
  76         u8 bl_verl;
  77         u8 tts_verh;
  78         u8 tts_verl;
  79         u8 app_idh;
  80         u8 app_idl;
  81         u8 app_verh;
  82         u8 app_verl;
  83         u8 tt_undef[5];
  84         u8 scn_typ;
  85         u8 act_intrvl;
  86         u8 tch_tmout;
  87         u8 lp_intrvl;
  88 };
  89
  90 /* TTSP Bootloader Register Map interface definition */
  91 #define CY_BL_CHKSUM_OK 0x01
  92 struct cyttsp_bootloader_data {
  93         u8 bl_file;
  94         u8 bl_status;
  95         u8 bl_error;
  96         u8 blver_hi;
  97         u8 blver_lo;
  98         u8 bld_blver_hi;
  99         u8 bld_blver_lo;
 100         u8 ttspver_hi;
 101         u8 ttspver_lo;
 102         u8 appid_hi;
 103         u8 appid_lo;
 104         u8 appver_hi;
 105         u8 appver_lo;
 106         u8 cid_0;
 107         u8 cid_1;
 108         u8 cid_2;
 109 };
 110
 111 struct cyttsp;
 112
 113 struct cyttsp_bus_ops {
 114         u16 bustype;
 115         int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
 116                         const void *values);
 117         int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
 118                         void *values);
 119 };
 120
 121 enum cyttsp_state {
 122         CY_IDLE_STATE,
 123         CY_ACTIVE_STATE,
 124         CY_BL_STATE,
 125 };
 126
 127 struct cyttsp {
 128         struct device *dev;
 129         int irq;
 130         struct input_dev *input;
 131         char phys[32];
 132         const struct cyttsp_bus_ops *bus_ops;
 133         struct cyttsp_bootloader_data bl_data;
 134         struct cyttsp_sysinfo_data sysinfo_data;
 135         struct cyttsp_xydata xy_data;
 136         struct completion bl_ready;
 137         enum cyttsp_state state;
 138         bool suspended;
 139
 140         struct gpio_desc *reset_gpio;
 141         bool use_hndshk;
 142         u8 act_dist;
 143         u8 act_intrvl;
 144         u8 tch_tmout;
 145         u8 lp_intrvl;
 146         u8 *bl_keys;
 147
 148         u8 xfer_buf[] ____cacheline_aligned;
 149 };
 150
 151 struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 152                             struct device *dev, int irq, size_t xfer_buf_size);
 153
 154 int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
 155                 u8 length, const void *values);
 156 int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
 157                 u8 length, void *values);
 158 extern const struct dev_pm_ops cyttsp_pm_ops;
 159
 160 #endif /* __CYTTSP_CORE_H__ */