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
  53 struct 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
  63 struct 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
  76 struct vprbrd_i2c_status {
  77         u8 unknown[11];
  78         u8 status;
  79 } __packed;
  80
  81 struct 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
  87 struct 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
  93 struct 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 */
 103 struct 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__ */