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/*
* The MIT License (MIT)
*
* Copyright (c) 2023 Ha Thach (thach@tinyusb.org) for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef TUSB_FTDI_SIO_H
#define TUSB_FTDI_SIO_H
// VID for matching FTDI devices
#define TU_FTDI_VID 0x0403
// Commands
#define FTDI_SIO_RESET 0 /* Reset the port */
#define FTDI_SIO_MODEM_CTRL 1 /* Set the modem control register */
#define FTDI_SIO_SET_FLOW_CTRL 2 /* Set flow control register */
#define FTDI_SIO_SET_BAUD_RATE 3 /* Set baud rate */
#define FTDI_SIO_SET_DATA 4 /* Set the data characteristics of the port */
#define FTDI_SIO_GET_MODEM_STATUS 5 /* Retrieve current value of modem status register */
#define FTDI_SIO_SET_EVENT_CHAR 6 /* Set the event character */
#define FTDI_SIO_SET_ERROR_CHAR 7 /* Set the error character */
#define FTDI_SIO_SET_LATENCY_TIMER 9 /* Set the latency timer */
#define FTDI_SIO_GET_LATENCY_TIMER 0x0a /* Get the latency timer */
#define FTDI_SIO_SET_BITMODE 0x0b /* Set bitbang mode */
#define FTDI_SIO_READ_PINS 0x0c /* Read immediate value of pins */
#define FTDI_SIO_READ_EEPROM 0x90 /* Read EEPROM */
/* FTDI_SIO_RESET */
#define FTDI_SIO_RESET_SIO 0
#define FTDI_SIO_RESET_PURGE_RX 1
#define FTDI_SIO_RESET_PURGE_TX 2
/*
* BmRequestType: 0100 0000B
* bRequest: FTDI_SIO_RESET
* wValue: Control Value
* 0 = Reset SIO
* 1 = Purge RX buffer
* 2 = Purge TX buffer
* wIndex: Port
* wLength: 0
* Data: None
*
* The Reset SIO command has this effect:
*
* Sets flow control set to 'none'
* Event char = $0D
* Event trigger = disabled
* Purge RX buffer
* Purge TX buffer
* Clear DTR
* Clear RTS
* baud and data format not reset
*
* The Purge RX and TX buffer commands affect nothing except the buffers
*
*/
/* FTDI_SIO_MODEM_CTRL */
/*
* BmRequestType: 0100 0000B
* bRequest: FTDI_SIO_MODEM_CTRL
* wValue: ControlValue (see below)
* wIndex: Port
* wLength: 0
* Data: None
*
* NOTE: If the device is in RTS/CTS flow control, the RTS set by this
* command will be IGNORED without an error being returned
* Also - you can not set DTR and RTS with one control message
*/
#define FTDI_SIO_SET_DTR_MASK 0x1
#define FTDI_SIO_SET_DTR_HIGH ((FTDI_SIO_SET_DTR_MASK << 8) | 1)
#define FTDI_SIO_SET_DTR_LOW ((FTDI_SIO_SET_DTR_MASK << 8) | 0)
#define FTDI_SIO_SET_RTS_MASK 0x2
#define FTDI_SIO_SET_RTS_HIGH ((FTDI_SIO_SET_RTS_MASK << 8) | 2)
#define FTDI_SIO_SET_RTS_LOW ((FTDI_SIO_SET_RTS_MASK << 8) | 0)
/*
* ControlValue
* B0 DTR state
* 0 = reset
* 1 = set
* B1 RTS state
* 0 = reset
* 1 = set
* B2..7 Reserved
* B8 DTR state enable
* 0 = ignore
* 1 = use DTR state
* B9 RTS state enable
* 0 = ignore
* 1 = use RTS state
* B10..15 Reserved
*/
/* FTDI_SIO_SET_FLOW_CTRL */
#define FTDI_SIO_DISABLE_FLOW_CTRL 0x0
#define FTDI_SIO_RTS_CTS_HS (0x1 << 8)
#define FTDI_SIO_DTR_DSR_HS (0x2 << 8)
#define FTDI_SIO_XON_XOFF_HS (0x4 << 8)
/*
* BmRequestType: 0100 0000b
* bRequest: FTDI_SIO_SET_FLOW_CTRL
* wValue: Xoff/Xon
* wIndex: Protocol/Port - hIndex is protocol / lIndex is port
* wLength: 0
* Data: None
*
* hIndex protocol is:
* B0 Output handshaking using RTS/CTS
* 0 = disabled
* 1 = enabled
* B1 Output handshaking using DTR/DSR
* 0 = disabled
* 1 = enabled
* B2 Xon/Xoff handshaking
* 0 = disabled
* 1 = enabled
*
* A value of zero in the hIndex field disables handshaking
*
* If Xon/Xoff handshaking is specified, the hValue field should contain the
* XOFF character and the lValue field contains the XON character.
*/
/* FTDI_SIO_SET_BAUD_RATE */
/*
* BmRequestType: 0100 0000B
* bRequest: FTDI_SIO_SET_BAUDRATE
* wValue: BaudDivisor value - see below
* wIndex: Port
* wLength: 0
* Data: None
* The BaudDivisor values are calculated as follows (too complicated):
*/
/* FTDI_SIO_SET_DATA */
#define FTDI_SIO_SET_DATA_PARITY_NONE (0x0 << 8)
#define FTDI_SIO_SET_DATA_PARITY_ODD (0x1 << 8)
#define FTDI_SIO_SET_DATA_PARITY_EVEN (0x2 << 8)
#define FTDI_SIO_SET_DATA_PARITY_MARK (0x3 << 8)
#define FTDI_SIO_SET_DATA_PARITY_SPACE (0x4 << 8)
#define FTDI_SIO_SET_DATA_STOP_BITS_1 (0x0 << 11)
#define FTDI_SIO_SET_DATA_STOP_BITS_15 (0x1 << 11)
#define FTDI_SIO_SET_DATA_STOP_BITS_2 (0x2 << 11)
#define FTDI_SIO_SET_BREAK (0x1 << 14)
/*
* BmRequestType: 0100 0000B
* bRequest: FTDI_SIO_SET_DATA
* wValue: Data characteristics (see below)
* wIndex: Port
* wLength: 0
* Data: No
*
* Data characteristics
*
* B0..7 Number of data bits
* B8..10 Parity
* 0 = None
* 1 = Odd
* 2 = Even
* 3 = Mark
* 4 = Space
* B11..13 Stop Bits
* 0 = 1
* 1 = 1.5
* 2 = 2
* B14
* 1 = TX ON (break)
* 0 = TX OFF (normal state)
* B15 Reserved
*
*/
/*
* DATA FORMAT
*
* IN Endpoint
*
* The device reserves the first two bytes of data on this endpoint to contain
* the current values of the modem and line status registers. In the absence of
* data, the device generates a message consisting of these two status bytes
* every 40 ms
*
* Byte 0: Modem Status
*
* Offset Description
* B0 Reserved - must be 1
* B1 Reserved - must be 0
* B2 Reserved - must be 0
* B3 Reserved - must be 0
* B4 Clear to Send (CTS)
* B5 Data Set Ready (DSR)
* B6 Ring Indicator (RI)
* B7 Receive Line Signal Detect (RLSD)
*
* Byte 1: Line Status
*
* Offset Description
* B0 Data Ready (DR)
* B1 Overrun Error (OE)
* B2 Parity Error (PE)
* B3 Framing Error (FE)
* B4 Break Interrupt (BI)
* B5 Transmitter Holding Register (THRE)
* B6 Transmitter Empty (TEMT)
* B7 Error in RCVR FIFO
*
*/
#define FTDI_RS0_CTS (1 << 4)
#define FTDI_RS0_DSR (1 << 5)
#define FTDI_RS0_RI (1 << 6)
#define FTDI_RS0_RLSD (1 << 7)
#define FTDI_RS_DR 1
#define FTDI_RS_OE (1<<1)
#define FTDI_RS_PE (1<<2)
#define FTDI_RS_FE (1<<3)
#define FTDI_RS_BI (1<<4)
#define FTDI_RS_THRE (1<<5)
#define FTDI_RS_TEMT (1<<6)
#define FTDI_RS_FIFO (1<<7)
#endif //TUSB_FTDI_SIO_H
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