1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  include/linux/mfd/viperboard.h
4  *
5  *  Nano River Technologies viperboard definitions
6  *
7  *  (C) 2012 by Lemonage GmbH
8  *  Author: Lars Poeschel <poeschel@lemonage.de>
9  *  All rights reserved.
10  */
11 
12 #ifndef __MFD_VIPERBOARD_H__
13 #define __MFD_VIPERBOARD_H__
14 
15 #include <linux/types.h>
16 #include <linux/usb.h>
17 
18 #define VPRBRD_EP_OUT               0x02
19 #define VPRBRD_EP_IN                0x86
20 
21 #define VPRBRD_I2C_MSG_LEN          512 /* max length of a msg on USB level */
22 
23 #define VPRBRD_I2C_FREQ_6MHZ        1                        /*   6 MBit/s */
24 #define VPRBRD_I2C_FREQ_3MHZ        2                        /*   3 MBit/s */
25 #define VPRBRD_I2C_FREQ_1MHZ        3                        /*   1 MBit/s */
26 #define VPRBRD_I2C_FREQ_FAST        4                        /* 400 kbit/s */
27 #define VPRBRD_I2C_FREQ_400KHZ      VPRBRD_I2C_FREQ_FAST
28 #define VPRBRD_I2C_FREQ_200KHZ      5                        /* 200 kbit/s */
29 #define VPRBRD_I2C_FREQ_STD         6                        /* 100 kbit/s */
30 #define VPRBRD_I2C_FREQ_100KHZ      VPRBRD_I2C_FREQ_STD
31 #define VPRBRD_I2C_FREQ_10KHZ       7                        /*  10 kbit/s */
32 
33 #define VPRBRD_I2C_CMD_WRITE        0x00
34 #define VPRBRD_I2C_CMD_READ         0x01
35 #define VPRBRD_I2C_CMD_ADDR         0x02
36 
37 #define VPRBRD_USB_TYPE_OUT	    0x40
38 #define VPRBRD_USB_TYPE_IN	    0xc0
39 #define VPRBRD_USB_TIMEOUT_MS       100
40 #define VPRBRD_USB_REQUEST_I2C_FREQ 0xe6
41 #define VPRBRD_USB_REQUEST_I2C      0xe9
42 #define VPRBRD_USB_REQUEST_MAJOR    0xea
43 #define VPRBRD_USB_REQUEST_MINOR    0xeb
44 #define VPRBRD_USB_REQUEST_ADC      0xec
45 #define VPRBRD_USB_REQUEST_GPIOA    0xed
46 #define VPRBRD_USB_REQUEST_GPIOB    0xdd
47 
48 struct vprbrd_i2c_write_hdr {
49 	u8 cmd;
50 	u16 addr;
51 	u8 len1;
52 	u8 len2;
53 	u8 last;
54 	u8 chan;
55 	u16 spi;
56 } __packed;
57 
58 struct vprbrd_i2c_read_hdr {
59 	u8 cmd;
60 	u16 addr;
61 	u8 len0;
62 	u8 len1;
63 	u8 len2;
64 	u8 len3;
65 	u8 len4;
66 	u8 len5;
67 	u16 tf1;                        /* transfer 1 length */
68 	u16 tf2;                        /* transfer 2 length */
69 } __packed;
70 
71 struct vprbrd_i2c_status {
72 	u8 unknown[11];
73 	u8 status;
74 } __packed;
75 
76 struct vprbrd_i2c_write_msg {
77 	struct vprbrd_i2c_write_hdr header;
78 	u8 data[VPRBRD_I2C_MSG_LEN
79 		- sizeof(struct vprbrd_i2c_write_hdr)];
80 } __packed;
81 
82 struct vprbrd_i2c_read_msg {
83 	struct vprbrd_i2c_read_hdr header;
84 	u8 data[VPRBRD_I2C_MSG_LEN
85 		- sizeof(struct vprbrd_i2c_read_hdr)];
86 } __packed;
87 
88 struct vprbrd_i2c_addr_msg {
89 	u8 cmd;
90 	u8 addr;
91 	u8 unknown1;
92 	u16 len;
93 	u8 unknown2;
94 	u8 unknown3;
95 } __packed;
96 
97 /* Structure to hold all device specific stuff */
98 struct vprbrd {
99 	struct usb_device *usb_dev; /* the usb device for this device */
100 	struct mutex lock;
101 	u8 buf[sizeof(struct vprbrd_i2c_write_msg)];
102 	struct platform_device pdev;
103 };
104 
105 #endif /* __MFD_VIPERBOARD_H__ */
106