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__ */
161