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a046541623
The ftdi chip itself has a "get bitmode" command that doesn't actually return the current bitmode, just a snapshot of the gpio lines. The chip apparently has no way to provide the current bitmode. This implements the functionality at the driver level. The driver starts out assuming the chip is in UART mode (which it will be, coming out of reset) and keeps track of every successful set-bitmode operation so that it can always return the current mode with UFTDIIOC_GET_BITMODE.
100 lines
3.5 KiB
C
100 lines
3.5 KiB
C
/*-
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* Copyright 2008-2012 - Symmetricom, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* FTDI USB serial converter chip ioctl commands.
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*/
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#ifndef _USB_UFTDIIO_H_
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#define _USB_UFTDIIO_H_
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#include <sys/ioccom.h>
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enum uftdi_bitmodes
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{
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UFTDI_BITMODE_ASYNC = 0,
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UFTDI_BITMODE_MPSSE = 1,
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UFTDI_BITMODE_SYNC = 2,
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UFTDI_BITMODE_CPU_EMUL = 3,
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UFTDI_BITMODE_FAST_SERIAL = 4,
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UFTDI_BITMODE_CBUS = 5,
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UFTDI_BITMODE_NONE = 0xff, /* aka UART mode. */
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};
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/*
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* For UFTDIIOC_SET_BITMODE:
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* mode = One of the uftdi_bitmodes enum values.
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* iomask = Mask of bits enabled for bitbang output.
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*
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* For UFTDIIOC_GET_BITMODE:
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* mode = Mode most recently set using UFTDIIOC_SET_BITMODE.
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* iomask = Returned snapshot of DBUS0..DBUS7 pin states at time of call.
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* Pin states can be read in any mode, not just bitbang modes.
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*/
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struct uftdi_bitmode
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{
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uint8_t mode;
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uint8_t iomask;
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};
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/*
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* For UFTDIIOC_READ_EEPROM, UFTDIIOC_WRITE_EEPROM:
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*
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* IO is done in 16-bit words at the chip level; offset and length are in bytes,
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* but must each be evenly divisible by two.
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*
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* It is not necessary to erase before writing. For the FT232R device (only)
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* you must set the latency timer to 0x77 before doing a series of eeprom writes
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* (and restore it to the prior value when done).
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*/
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struct uftdi_eeio
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{
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uint16_t offset;
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uint16_t length;
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uint16_t data[64];
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};
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/* Pass this value to confirm that eeprom erase request is not accidental. */
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#define UFTDI_CONFIRM_ERASE 0x26139108
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#define UFTDIIOC_RESET_IO _IO('c', 0) /* Reset config, flush fifos.*/
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#define UFTDIIOC_RESET_RX _IO('c', 1) /* Flush input fifo. */
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#define UFTDIIOC_RESET_TX _IO('c', 2) /* Flush output fifo. */
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#define UFTDIIOC_SET_BITMODE _IOW('c', 3, struct uftdi_bitmode)
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#define UFTDIIOC_GET_BITMODE _IOR('c', 4, struct uftdi_bitmode)
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#define UFTDIIOC_SET_ERROR_CHAR _IOW('c', 5, int) /* -1 to disable */
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#define UFTDIIOC_SET_EVENT_CHAR _IOW('c', 6, int) /* -1 to disable */
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#define UFTDIIOC_SET_LATENCY _IOW('c', 7, int) /* 1-255 ms */
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#define UFTDIIOC_GET_LATENCY _IOR('c', 8, int)
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#define UFTDIIOC_GET_HWREV _IOR('c', 9, int)
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#define UFTDIIOC_READ_EEPROM _IOWR('c', 10, struct uftdi_eeio)
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#define UFTDIIOC_WRITE_EEPROM _IOW('c', 11, struct uftdi_eeio)
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#define UFTDIIOC_ERASE_EEPROM _IOW('c', 12, int)
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#endif
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