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/* $OpenBSD: uslhcomreg.h,v 1.2 2015/01/22 14:33:01 krw Exp $ */
/*
* Copyright (c) 2015 SASANO Takayoshi <uaa@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define USLHCOM_TX_HEADER_SIZE sizeof(u_char)
#define SET_TRANSMIT_DATA(x) (x)
#define GET_RECEIVE_DATA(x) (x)
#define SET_DEVICE_RESET 0x40
#define GET_SET_UART_ENABLE 0x41
#define GET_UART_STATUS 0x42
#define SET_CLEAR_FIFOS 0x43
#define GET_GPIO_STATE 0x44
#define SET_GPIO_STATE 0x45
#define GET_VERSION 0x46
#define GET_SET_OTP_LOCK_BYTE 0x47
#define GET_SET_UART_CONFIG 0x50
#define SET_TRANSMIT_LINE_BREAK 0x51
#define SET_STOP_LINE_BREAK 0x52
/* SET_DEVICE_RESET */
#define DEVICE_RESET_VALUE 0x00
/* GET_SET_UART_ENABLE */
#define UART_DISABLE 0x00
#define UART_ENABLE 0x01
/* GET_UART_STATUS */
struct uslhcom_uart_status {
u_char tx_fifo[2]; /* (big endian) */
u_char rx_fifo[2]; /* (big endian) */
u_char error_status;
u_char break_status;
} __packed;
#define ERROR_STATUS_PARITY 0x01
#define ERROR_STATUS_OVERRUN 0x02
#define BREAK_STATUS 0x01
/* SET_CLEAR_FIFO */
#define CLEAR_TX_FIFO 0x01
#define CLEAR_RX_FIFO 0x02
/* GET_VERSION */
struct uslhcom_version_info {
u_char product_id;
u_char product_revision;
} __packed;
/* GET_SET_UART_CONFIG */
struct uslhcom_uart_config {
u_char baud_rate[4]; /* (big endian) */
u_char parity;
u_char data_control;
u_char data_bits;
u_char stop_bits;
} __packed;
/*
* Silicon Labs CP2110/4 Application Note (AN434) Rev 0.4 says that
* valid baud rate is 300bps to 500,000bps.
* But HidUartSample of CP2110 SDK accepts 50bps to 2,000,000bps.
*/
#define UART_CONFIG_BAUD_RATE_MIN 50
#define UART_CONFIG_BAUD_RATE_MAX 2000000
#define UART_CONFIG_PARITY_NONE 0x00
#define UART_CONFIG_PARITY_EVEN 0x01
#define UART_CONFIG_PARITY_ODD 0x02
#define UART_CONFIG_PARITY_MARK 0x03
#define UART_CONFIG_PARITY_SPACE 0x04
#define UART_CONFIG_DATA_CONTROL_NONE 0x00
#define UART_CONFIG_DATA_CONTROL_HARD 0x01
/*
* AN434 Rev 0.4 describes setting 0x05 ... 0x08 to configure data bits.
* But actually it requires different values.
*/
#define UART_CONFIG_DATA_BITS_5 0x00
#define UART_CONFIG_DATA_BITS_6 0x01
#define UART_CONFIG_DATA_BITS_7 0x02
#define UART_CONFIG_DATA_BITS_8 0x03
#define UART_CONFIG_STOP_BITS_1 0x00
#define UART_CONFIG_STOP_BITS_2 0x01
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