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

source code of linux/include/linux/mfd/viperboard.h