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mfd: Add viperboard driver

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Add mfd driver for Nano River Technologies viperboard.

Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Lars Poeschel
2012-11-05 15:48:23 +01:00
committed by Samuel Ortiz
parent b9fbb62eb6
commit f01312d846
4 changed files with 249 additions and 0 deletions
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include/linux/mfd/viperboard.h
+105
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/*
* include/linux/mfd/viperboard.h
*
* Nano River Technologies viperboard definitions
*
* (C) 2012 by Lemonage GmbH
* Author: Lars Poeschel <poeschel@lemonage.de>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#ifndef __MFD_VIPERBOARD_H__
#define __MFD_VIPERBOARD_H__
#include <linux/types.h>
#include <linux/usb.h>
#define VPRBRD_EP_OUT 0x02
#define VPRBRD_EP_IN 0x86
#define VPRBRD_I2C_MSG_LEN 512 /* max length of a msg on USB level */
#define VPRBRD_I2C_FREQ_6MHZ 1 /* 6 MBit/s */
#define VPRBRD_I2C_FREQ_3MHZ 2 /* 3 MBit/s */
#define VPRBRD_I2C_FREQ_1MHZ 3 /* 1 MBit/s */
#define VPRBRD_I2C_FREQ_FAST 4 /* 400 kbit/s */
#define VPRBRD_I2C_FREQ_400KHZ VPRBRD_I2C_FREQ_FAST
#define VPRBRD_I2C_FREQ_200KHZ 5 /* 200 kbit/s */
#define VPRBRD_I2C_FREQ_STD 6 /* 100 kbit/s */
#define VPRBRD_I2C_FREQ_100KHZ VPRBRD_I2C_FREQ_STD
#define VPRBRD_I2C_FREQ_10KHZ 7 /* 10 kbit/s */
#define VPRBRD_I2C_CMD_WRITE 0x00
#define VPRBRD_I2C_CMD_READ 0x01
#define VPRBRD_I2C_CMD_ADDR 0x02
#define VPRBRD_USB_TYPE_OUT 0x40
#define VPRBRD_USB_TYPE_IN 0xc0
#define VPRBRD_USB_TIMEOUT_MS 100
#define VPRBRD_USB_REQUEST_MAJOR 0xea
#define VPRBRD_USB_REQUEST_MINOR 0xeb
struct vprbrd_i2c_write_hdr {
u8 cmd;
u16 addr;
u8 len1;
u8 len2;
u8 last;
u8 chan;
u16 spi;
} __packed;
struct vprbrd_i2c_read_hdr {
u8 cmd;
u16 addr;
u8 len0;
u8 len1;
u8 len2;
u8 len3;
u8 len4;
u8 len5;
u16 tf1; /* transfer 1 length */
u16 tf2; /* transfer 2 length */
} __packed;
struct vprbrd_i2c_status {
u8 unknown[11];
u8 status;
} __packed;
struct vprbrd_i2c_write_msg {
struct vprbrd_i2c_write_hdr header;
u8 data[VPRBRD_I2C_MSG_LEN
- sizeof(struct vprbrd_i2c_write_hdr)];
} __packed;
struct vprbrd_i2c_read_msg {
struct vprbrd_i2c_read_hdr header;
u8 data[VPRBRD_I2C_MSG_LEN
- sizeof(struct vprbrd_i2c_read_hdr)];
} __packed;
struct vprbrd_i2c_addr_msg {
u8 cmd;
u8 addr;
u8 unknown1;
u16 len;
u8 unknown2;
u8 unknown3;
} __packed;
/* Structure to hold all device specific stuff */
struct vprbrd {
struct usb_device *usb_dev; /* the usb device for this device */
struct mutex lock;
u8 buf[sizeof(struct vprbrd_i2c_write_msg)];
struct platform_device pdev;
};
#endif /* __MFD_VIPERBOARD_H__ */