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
48struct 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
58struct 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
71struct vprbrd_i2c_status {
72	u8 unknown[11];
73	u8 status;
74} __packed;
75
76struct 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
82struct 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
88struct 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 */
98struct 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