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// SPDX-License-Identifier: GPL-1.0+
/*
* m32r_sio_reg.h
*
* Copyright (C) 1992, 1994 by Theodore Ts'o.
* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
*
* Redistribution of this file is permitted under the terms of the GNU
* Public License (GPL)
*
* These are the UART port assignments, expressed as offsets from the base
* register. These assignments should hold for any serial port based on
* a 8250, 16450, or 16550(A).
*/
#ifndef _M32R_SIO_REG_H
#define _M32R_SIO_REG_H
#ifdef CONFIG_SERIAL_M32R_PLDSIO
#define SIOCR 0x000
#define SIOMOD0 0x002
#define SIOMOD1 0x004
#define SIOSTS 0x006
#define SIOTRCR 0x008
#define SIOBAUR 0x00a
// #define SIORBAUR 0x018
#define SIOTXB 0x00c
#define SIORXB 0x00e
#define UART_RX ((unsigned long) PLD_ESIO0RXB)
/* In: Receive buffer (DLAB=0) */
#define UART_TX ((unsigned long) PLD_ESIO0TXB)
/* Out: Transmit buffer (DLAB=0) */
#define UART_DLL 0 /* Out: Divisor Latch Low (DLAB=1) */
#define UART_TRG 0 /* (LCR=BF) FCTR bit 7 selects Rx or Tx
* In: Fifo count
* Out: Fifo custom trigger levels
* XR16C85x only */
#define UART_DLM 0 /* Out: Divisor Latch High (DLAB=1) */
#define UART_IER ((unsigned long) PLD_ESIO0INTCR)
/* Out: Interrupt Enable Register */
#define UART_FCTR 0 /* (LCR=BF) Feature Control Register
* XR16C85x only */
#define UART_IIR 0 /* In: Interrupt ID Register */
#define UART_FCR 0 /* Out: FIFO Control Register */
#define UART_EFR 0 /* I/O: Extended Features Register */
/* (DLAB=1, 16C660 only) */
#define UART_LCR 0 /* Out: Line Control Register */
#define UART_MCR 0 /* Out: Modem Control Register */
#define UART_LSR ((unsigned long) PLD_ESIO0STS)
/* In: Line Status Register */
#define UART_MSR 0 /* In: Modem Status Register */
#define UART_SCR 0 /* I/O: Scratch Register */
#define UART_EMSR 0 /* (LCR=BF) Extended Mode Select Register
* FCTR bit 6 selects SCR or EMSR
* XR16c85x only */
#else /* not CONFIG_SERIAL_M32R_PLDSIO */
#define SIOCR 0x000
#define SIOMOD0 0x004
#define SIOMOD1 0x008
#define SIOSTS 0x00c
#define SIOTRCR 0x010
#define SIOBAUR 0x014
#define SIORBAUR 0x018
#define SIOTXB 0x01c
#define SIORXB 0x020
#define UART_RX M32R_SIO0_RXB_PORTL /* In: Receive buffer (DLAB=0) */
#define UART_TX M32R_SIO0_TXB_PORTL /* Out: Transmit buffer (DLAB=0) */
#define UART_DLL 0 /* Out: Divisor Latch Low (DLAB=1) */
#define UART_TRG 0 /* (LCR=BF) FCTR bit 7 selects Rx or Tx
* In: Fifo count
* Out: Fifo custom trigger levels
* XR16C85x only */
#define UART_DLM 0 /* Out: Divisor Latch High (DLAB=1) */
#define UART_IER M32R_SIO0_TRCR_PORTL /* Out: Interrupt Enable Register */
#define UART_FCTR 0 /* (LCR=BF) Feature Control Register
* XR16C85x only */
#define UART_IIR 0 /* In: Interrupt ID Register */
#define UART_FCR 0 /* Out: FIFO Control Register */
#define UART_EFR 0 /* I/O: Extended Features Register */
/* (DLAB=1, 16C660 only) */
#define UART_LCR 0 /* Out: Line Control Register */
#define UART_MCR 0 /* Out: Modem Control Register */
#define UART_LSR M32R_SIO0_STS_PORTL /* In: Line Status Register */
#define UART_MSR 0 /* In: Modem Status Register */
#define UART_SCR 0 /* I/O: Scratch Register */
#define UART_EMSR 0 /* (LCR=BF) Extended Mode Select Register
* FCTR bit 6 selects SCR or EMSR
* XR16c85x only */
#endif /* CONFIG_SERIAL_M32R_PLDSIO */
#define UART_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
/*
* These are the definitions for the Line Control Register
*
* Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting
* UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
*/
#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */
#define UART_LCR_SBC 0x40 /* Set break control */
#define UART_LCR_SPAR 0x20 /* Stick parity (?) */
#define UART_LCR_EPAR 0x10 /* Even parity select */
#define UART_LCR_PARITY 0x08 /* Parity Enable */
#define UART_LCR_STOP 0x04 /* Stop bits: 0=1 stop bit, 1= 2 stop bits */
#define UART_LCR_WLEN5 0x00 /* Wordlength: 5 bits */
#define UART_LCR_WLEN6 0x01 /* Wordlength: 6 bits */
#define UART_LCR_WLEN7 0x02 /* Wordlength: 7 bits */
#define UART_LCR_WLEN8 0x03 /* Wordlength: 8 bits */
/*
* These are the definitions for the Line Status Register
*/
#define UART_LSR_TEMT 0x02 /* Transmitter empty */
#define UART_LSR_THRE 0x01 /* Transmit-hold-register empty */
#define UART_LSR_BI 0x00 /* Break interrupt indicator */
#define UART_LSR_FE 0x80 /* Frame error indicator */
#define UART_LSR_PE 0x40 /* Parity error indicator */
#define UART_LSR_OE 0x20 /* Overrun error indicator */
#define UART_LSR_DR 0x04 /* Receiver data ready */
/*
* These are the definitions for the Interrupt Identification Register
*/
#define UART_IIR_NO_INT 0x01 /* No interrupts pending */
#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
#define UART_IIR_MSI 0x00 /* Modem status interrupt */
#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */
#define UART_IIR_RDI 0x04 /* Receiver data interrupt */
#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */
/*
* These are the definitions for the Interrupt Enable Register
*/
#define UART_IER_MSI 0x00 /* Enable Modem status interrupt */
#define UART_IER_RLSI 0x08 /* Enable receiver line status interrupt */
#define UART_IER_THRI 0x03 /* Enable Transmitter holding register int. */
#define UART_IER_RDI 0x04 /* Enable receiver data interrupt */
#endif /* _M32R_SIO_REG_H */
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