LXR linux/include/linux/mfd/viperboard.h

   1/*
   2 *  include/linux/mfd/viperboard.h
   3 *
   4 *  Nano River Technologies viperboard definitions
   5 *
   6 *  (C) 2012 by Lemonage GmbH
   7 *  Author: Lars Poeschel <poeschel@lemonage.de>
   8 *  All rights reserved.
   9 *
  10 *  This program is free software; you can redistribute  it and/or modify it
  11 *  under  the terms of  the GNU General  Public License as published by the
  12 *  Free Software Foundation;  either version 2 of the  License, or (at your
  13 *  option) any later version.
  14 *
  15 */
  16
  17#ifndef __MFD_VIPERBOARD_H__
  18#define __MFD_VIPERBOARD_H__
  19
  20#include <linux/types.h>
  21#include <linux/usb.h>
  22
  23#define VPRBRD_EP_OUT               0x02
  24#define VPRBRD_EP_IN                0x86
  25
  26#define VPRBRD_I2C_MSG_LEN          512 /* max length of a msg on USB level */
  27
  28#define VPRBRD_I2C_FREQ_6MHZ        1                        /*   6 MBit/s */
  29#define VPRBRD_I2C_FREQ_3MHZ        2                        /*   3 MBit/s */
  30#define VPRBRD_I2C_FREQ_1MHZ        3                        /*   1 MBit/s */
  31#define VPRBRD_I2C_FREQ_FAST        4                        /* 400 kbit/s */
  32#define VPRBRD_I2C_FREQ_400KHZ      VPRBRD_I2C_FREQ_FAST
  33#define VPRBRD_I2C_FREQ_200KHZ      5                        /* 200 kbit/s */
  34#define VPRBRD_I2C_FREQ_STD         6                        /* 100 kbit/s */
  35#define VPRBRD_I2C_FREQ_100KHZ      VPRBRD_I2C_FREQ_STD
  36#define VPRBRD_I2C_FREQ_10KHZ       7                        /*  10 kbit/s */
  37
  38#define VPRBRD_I2C_CMD_WRITE        0x00
  39#define VPRBRD_I2C_CMD_READ         0x01
  40#define VPRBRD_I2C_CMD_ADDR         0x02
  41
  42#define VPRBRD_USB_TYPE_OUT         0x40
  43#define VPRBRD_USB_TYPE_IN          0xc0
  44#define VPRBRD_USB_TIMEOUT_MS       100
  45#define VPRBRD_USB_REQUEST_I2C_FREQ 0xe6
  46#define VPRBRD_USB_REQUEST_I2C      0xe9
  47#define VPRBRD_USB_REQUEST_MAJOR    0xea
  48#define VPRBRD_USB_REQUEST_MINOR    0xeb
  49#define VPRBRD_USB_REQUEST_ADC      0xec
  50#define VPRBRD_USB_REQUEST_GPIOA    0xed
  51#define VPRBRD_USB_REQUEST_GPIOB    0xdd
  52
  53struct vprbrd_i2c_write_hdr {
  54        u8 cmd;
  55        u16 addr;
  56        u8 len1;
  57        u8 len2;
  58        u8 last;
  59        u8 chan;
  60        u16 spi;
  61} __packed;
  62
  63struct vprbrd_i2c_read_hdr {
  64        u8 cmd;
  65        u16 addr;
  66        u8 len0;
  67        u8 len1;
  68        u8 len2;
  69        u8 len3;
  70        u8 len4;
  71        u8 len5;
  72        u16 tf1;                        /* transfer 1 length */
  73        u16 tf2;                        /* transfer 2 length */
  74} __packed;
  75
  76struct vprbrd_i2c_status {
  77        u8 unknown[11];
  78        u8 status;
  79} __packed;
  80
  81struct vprbrd_i2c_write_msg {
  82        struct vprbrd_i2c_write_hdr header;
  83        u8 data[VPRBRD_I2C_MSG_LEN
  84                - sizeof(struct vprbrd_i2c_write_hdr)];
  85} __packed;
  86
  87struct vprbrd_i2c_read_msg {
  88        struct vprbrd_i2c_read_hdr header;
  89        u8 data[VPRBRD_I2C_MSG_LEN
  90                - sizeof(struct vprbrd_i2c_read_hdr)];
  91} __packed;
  92
  93struct vprbrd_i2c_addr_msg {
  94        u8 cmd;
  95        u8 addr;
  96        u8 unknown1;
  97        u16 len;
  98        u8 unknown2;
  99        u8 unknown3;
 100} __packed;
 101
 102/* Structure to hold all device specific stuff */
 103struct vprbrd {
 104        struct usb_device *usb_dev; /* the usb device for this device */
 105        struct mutex lock;
 106        u8 buf[sizeof(struct vprbrd_i2c_write_msg)];
 107        struct platform_device pdev;
 108};
 109
 110#endif /* __MFD_VIPERBOARD_H__ */
 111