Release 4.12 include/uapi/linux/serial_reg.h
/*
* include/linux/serial_reg.h
*
* Copyright (C) 1992, 1994 by Theodore Ts'o.
*
* 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 _LINUX_SERIAL_REG_H
#define _LINUX_SERIAL_REG_H
/*
* DLAB=0
*/
#define UART_RX 0
/* In: Receive buffer */
#define UART_TX 0
/* Out: Transmit buffer */
#define UART_IER 1
/* Out: Interrupt Enable Register */
#define UART_IER_MSI 0x08
/* Enable Modem status interrupt */
#define UART_IER_RLSI 0x04
/* Enable receiver line status interrupt */
#define UART_IER_THRI 0x02
/* Enable Transmitter holding register int. */
#define UART_IER_RDI 0x01
/* Enable receiver data interrupt */
/*
* Sleep mode for ST16650 and TI16750. For the ST16650, EFR[4]=1
*/
#define UART_IERX_SLEEP 0x10
/* Enable sleep mode */
#define UART_IIR 2
/* In: Interrupt ID Register */
#define UART_IIR_NO_INT 0x01
/* No interrupts pending */
#define UART_IIR_ID 0x0e
/* 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 */
#define UART_IIR_BUSY 0x07
/* DesignWare APB Busy Detect */
#define UART_IIR_RX_TIMEOUT 0x0c
/* OMAP RX Timeout interrupt */
#define UART_IIR_XOFF 0x10
/* OMAP XOFF/Special Character */
#define UART_IIR_CTS_RTS_DSR 0x20
/* OMAP CTS/RTS/DSR Change */
#define UART_FCR 2
/* Out: FIFO Control Register */
#define UART_FCR_ENABLE_FIFO 0x01
/* Enable the FIFO */
#define UART_FCR_CLEAR_RCVR 0x02
/* Clear the RCVR FIFO */
#define UART_FCR_CLEAR_XMIT 0x04
/* Clear the XMIT FIFO */
#define UART_FCR_DMA_SELECT 0x08
/* For DMA applications */
/*
* Note: The FIFO trigger levels are chip specific:
* RX:76 = 00 01 10 11 TX:54 = 00 01 10 11
* PC16550D: 1 4 8 14 xx xx xx xx
* TI16C550A: 1 4 8 14 xx xx xx xx
* TI16C550C: 1 4 8 14 xx xx xx xx
* ST16C550: 1 4 8 14 xx xx xx xx
* ST16C650: 8 16 24 28 16 8 24 30 PORT_16650V2
* NS16C552: 1 4 8 14 xx xx xx xx
* ST16C654: 8 16 56 60 8 16 32 56 PORT_16654
* TI16C750: 1 16 32 56 xx xx xx xx PORT_16750
* TI16C752: 8 16 56 60 8 16 32 56
* Tegra: 1 4 8 14 16 8 4 1 PORT_TEGRA
*/
#define UART_FCR_R_TRIG_00 0x00
#define UART_FCR_R_TRIG_01 0x40
#define UART_FCR_R_TRIG_10 0x80
#define UART_FCR_R_TRIG_11 0xc0
#define UART_FCR_T_TRIG_00 0x00
#define UART_FCR_T_TRIG_01 0x10
#define UART_FCR_T_TRIG_10 0x20
#define UART_FCR_T_TRIG_11 0x30
#define UART_FCR_TRIGGER_MASK 0xC0
/* Mask for the FIFO trigger range */
#define UART_FCR_TRIGGER_1 0x00
/* Mask for trigger set at 1 */
#define UART_FCR_TRIGGER_4 0x40
/* Mask for trigger set at 4 */
#define UART_FCR_TRIGGER_8 0x80
/* Mask for trigger set at 8 */
#define UART_FCR_TRIGGER_14 0xC0
/* Mask for trigger set at 14 */
/* 16650 definitions */
#define UART_FCR6_R_TRIGGER_8 0x00
/* Mask for receive trigger set at 1 */
#define UART_FCR6_R_TRIGGER_16 0x40
/* Mask for receive trigger set at 4 */
#define UART_FCR6_R_TRIGGER_24 0x80
/* Mask for receive trigger set at 8 */
#define UART_FCR6_R_TRIGGER_28 0xC0
/* Mask for receive trigger set at 14 */
#define UART_FCR6_T_TRIGGER_16 0x00
/* Mask for transmit trigger set at 16 */
#define UART_FCR6_T_TRIGGER_8 0x10
/* Mask for transmit trigger set at 8 */
#define UART_FCR6_T_TRIGGER_24 0x20
/* Mask for transmit trigger set at 24 */
#define UART_FCR6_T_TRIGGER_30 0x30
/* Mask for transmit trigger set at 30 */
#define UART_FCR7_64BYTE 0x20
/* Go into 64 byte mode (TI16C750 and
some Freescale UARTs) */
#define UART_FCR_R_TRIG_SHIFT 6
#define UART_FCR_R_TRIG_BITS(x) \
(((x) & UART_FCR_TRIGGER_MASK) >> UART_FCR_R_TRIG_SHIFT)
#define UART_FCR_R_TRIG_MAX_STATE 4
#define UART_LCR 3
/* Out: 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 bit, 1=2 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 */
/*
* Access to some registers depends on register access / configuration
* mode.
*/
#define UART_LCR_CONF_MODE_A UART_LCR_DLAB
/* Configutation mode A */
#define UART_LCR_CONF_MODE_B 0xBF
/* Configutation mode B */
#define UART_MCR 4
/* Out: Modem Control Register */
#define UART_MCR_CLKSEL 0x80
/* Divide clock by 4 (TI16C752, EFR[4]=1) */
#define UART_MCR_TCRTLR 0x40
/* Access TCR/TLR (TI16C752, EFR[4]=1) */
#define UART_MCR_XONANY 0x20
/* Enable Xon Any (TI16C752, EFR[4]=1) */
#define UART_MCR_AFE 0x20
/* Enable auto-RTS/CTS (TI16C550C/TI16C750) */
#define UART_MCR_LOOP 0x10
/* Enable loopback test mode */
#define UART_MCR_OUT2 0x08
/* Out2 complement */
#define UART_MCR_OUT1 0x04
/* Out1 complement */
#define UART_MCR_RTS 0x02
/* RTS complement */
#define UART_MCR_DTR 0x01
/* DTR complement */
#define UART_LSR 5
/* In: Line Status Register */
#define UART_LSR_FIFOE 0x80
/* Fifo error */
#define UART_LSR_TEMT 0x40
/* Transmitter empty */
#define UART_LSR_THRE 0x20
/* Transmit-hold-register empty */
#define UART_LSR_BI 0x10
/* Break interrupt indicator */
#define UART_LSR_FE 0x08
/* Frame error indicator */
#define UART_LSR_PE 0x04
/* Parity error indicator */
#define UART_LSR_OE 0x02
/* Overrun error indicator */
#define UART_LSR_DR 0x01
/* Receiver data ready */
#define UART_LSR_BRK_ERROR_BITS 0x1E
/* BI, FE, PE, OE bits */
#define UART_MSR 6
/* In: Modem Status Register */
#define UART_MSR_DCD 0x80
/* Data Carrier Detect */
#define UART_MSR_RI 0x40
/* Ring Indicator */
#define UART_MSR_DSR 0x20
/* Data Set Ready */
#define UART_MSR_CTS 0x10
/* Clear to Send */
#define UART_MSR_DDCD 0x08
/* Delta DCD */
#define UART_MSR_TERI 0x04
/* Trailing edge ring indicator */
#define UART_MSR_DDSR 0x02
/* Delta DSR */
#define UART_MSR_DCTS 0x01
/* Delta CTS */
#define UART_MSR_ANY_DELTA 0x0F
/* Any of the delta bits! */
#define UART_SCR 7
/* I/O: Scratch Register */
/*
* DLAB=1
*/
#define UART_DLL 0
/* Out: Divisor Latch Low */
#define UART_DLM 1
/* Out: Divisor Latch High */
/*
* LCR=0xBF (or DLAB=1 for 16C660)
*/
#define UART_EFR 2
/* I/O: Extended Features Register */
#define UART_XR_EFR 9
/* I/O: Extended Features Register (XR17D15x) */
#define UART_EFR_CTS 0x80
/* CTS flow control */
#define UART_EFR_RTS 0x40
/* RTS flow control */
#define UART_EFR_SCD 0x20
/* Special character detect */
#define UART_EFR_ECB 0x10
/* Enhanced control bit */
/*
* the low four bits control software flow control
*/
/*
* LCR=0xBF, TI16C752, ST16650, ST16650A, ST16654
*/
#define UART_XON1 4
/* I/O: Xon character 1 */
#define UART_XON2 5
/* I/O: Xon character 2 */
#define UART_XOFF1 6
/* I/O: Xoff character 1 */
#define UART_XOFF2 7
/* I/O: Xoff character 2 */
/*
* EFR[4]=1 MCR[6]=1, TI16C752
*/
#define UART_TI752_TCR 6
/* I/O: transmission control register */
#define UART_TI752_TLR 7
/* I/O: trigger level register */
/*
* LCR=0xBF, XR16C85x
*/
#define UART_TRG 0
/* FCTR bit 7 selects Rx or Tx
* In: Fifo count
* Out: Fifo custom trigger levels */
/*
* These are the definitions for the Programmable Trigger Register
*/
#define UART_TRG_1 0x01
#define UART_TRG_4 0x04
#define UART_TRG_8 0x08
#define UART_TRG_16 0x10
#define UART_TRG_32 0x20
#define UART_TRG_64 0x40
#define UART_TRG_96 0x60
#define UART_TRG_120 0x78
#define UART_TRG_128 0x80
#define UART_FCTR 1
/* Feature Control Register */
#define UART_FCTR_RTS_NODELAY 0x00
/* RTS flow control delay */
#define UART_FCTR_RTS_4DELAY 0x01
#define UART_FCTR_RTS_6DELAY 0x02
#define UART_FCTR_RTS_8DELAY 0x03
#define UART_FCTR_IRDA 0x04
/* IrDa data encode select */
#define UART_FCTR_TX_INT 0x08
/* Tx interrupt type select */
#define UART_FCTR_TRGA 0x00
/* Tx/Rx 550 trigger table select */
#define UART_FCTR_TRGB 0x10
/* Tx/Rx 650 trigger table select */
#define UART_FCTR_TRGC 0x20
/* Tx/Rx 654 trigger table select */
#define UART_FCTR_TRGD 0x30
/* Tx/Rx 850 programmable trigger select */
#define UART_FCTR_SCR_SWAP 0x40
/* Scratch pad register swap */
#define UART_FCTR_RX 0x00
/* Programmable trigger mode select */
#define UART_FCTR_TX 0x80
/* Programmable trigger mode select */
/*
* LCR=0xBF, FCTR[6]=1
*/
#define UART_EMSR 7
/* Extended Mode Select Register */
#define UART_EMSR_FIFO_COUNT 0x01
/* Rx/Tx select */
#define UART_EMSR_ALT_COUNT 0x02
/* Alternating count select */
/*
* The Intel XScale on-chip UARTs define these bits
*/
#define UART_IER_DMAE 0x80
/* DMA Requests Enable */
#define UART_IER_UUE 0x40
/* UART Unit Enable */
#define UART_IER_NRZE 0x20
/* NRZ coding Enable */
#define UART_IER_RTOIE 0x10
/* Receiver Time Out Interrupt Enable */
#define UART_IIR_TOD 0x08
/* Character Timeout Indication Detected */
#define UART_FCR_PXAR1 0x00
/* receive FIFO threshold = 1 */
#define UART_FCR_PXAR8 0x40
/* receive FIFO threshold = 8 */
#define UART_FCR_PXAR16 0x80
/* receive FIFO threshold = 16 */
#define UART_FCR_PXAR32 0xc0
/* receive FIFO threshold = 32 */
/*
* These register definitions are for the 16C950
*/
#define UART_ASR 0x01
/* Additional Status Register */
#define UART_RFL 0x03
/* Receiver FIFO level */
#define UART_TFL 0x04
/* Transmitter FIFO level */
#define UART_ICR 0x05
/* Index Control Register */
/* The 16950 ICR registers */
#define UART_ACR 0x00
/* Additional Control Register */
#define UART_CPR 0x01
/* Clock Prescalar Register */
#define UART_TCR 0x02
/* Times Clock Register */
#define UART_CKS 0x03
/* Clock Select Register */
#define UART_TTL 0x04
/* Transmitter Interrupt Trigger Level */
#define UART_RTL 0x05
/* Receiver Interrupt Trigger Level */
#define UART_FCL 0x06
/* Flow Control Level Lower */
#define UART_FCH 0x07
/* Flow Control Level Higher */
#define UART_ID1 0x08
/* ID #1 */
#define UART_ID2 0x09
/* ID #2 */
#define UART_ID3 0x0A
/* ID #3 */
#define UART_REV 0x0B
/* Revision */
#define UART_CSR 0x0C
/* Channel Software Reset */
#define UART_NMR 0x0D
/* Nine-bit Mode Register */
#define UART_CTR 0xFF
/*
* The 16C950 Additional Control Register
*/
#define UART_ACR_RXDIS 0x01
/* Receiver disable */
#define UART_ACR_TXDIS 0x02
/* Transmitter disable */
#define UART_ACR_DSRFC 0x04
/* DSR Flow Control */
#define UART_ACR_TLENB 0x20
/* 950 trigger levels enable */
#define UART_ACR_ICRRD 0x40
/* ICR Read enable */
#define UART_ACR_ASREN 0x80
/* Additional status enable */
/*
* These definitions are for the RSA-DV II/S card, from
*
* Kiyokazu SUTO <suto@ks-and-ks.ne.jp>
*/
#define UART_RSA_BASE (-8)
#define UART_RSA_MSR ((UART_RSA_BASE) + 0)
/* I/O: Mode Select Register */
#define UART_RSA_MSR_SWAP (1 << 0)
/* Swap low/high 8 bytes in I/O port addr */
#define UART_RSA_MSR_FIFO (1 << 2)
/* Enable the external FIFO */
#define UART_RSA_MSR_FLOW (1 << 3)
/* Enable the auto RTS/CTS flow control */
#define UART_RSA_MSR_ITYP (1 << 4)
/* Level (1) / Edge triger (0) */
#define UART_RSA_IER ((UART_RSA_BASE) + 1)
/* I/O: Interrupt Enable Register */
#define UART_RSA_IER_Rx_FIFO_H (1 << 0)
/* Enable Rx FIFO half full int. */
#define UART_RSA_IER_Tx_FIFO_H (1 << 1)
/* Enable Tx FIFO half full int. */
#define UART_RSA_IER_Tx_FIFO_E (1 << 2)
/* Enable Tx FIFO empty int. */
#define UART_RSA_IER_Rx_TOUT (1 << 3)
/* Enable char receive timeout int */
#define UART_RSA_IER_TIMER (1 << 4)
/* Enable timer interrupt */
#define UART_RSA_SRR ((UART_RSA_BASE) + 2)
/* IN: Status Read Register */
#define UART_RSA_SRR_Tx_FIFO_NEMP (1 << 0)
/* Tx FIFO is not empty (1) */
#define UART_RSA_SRR_Tx_FIFO_NHFL (1 << 1)
/* Tx FIFO is not half full (1) */
#define UART_RSA_SRR_Tx_FIFO_NFUL (1 << 2)
/* Tx FIFO is not full (1) */
#define UART_RSA_SRR_Rx_FIFO_NEMP (1 << 3)
/* Rx FIFO is not empty (1) */
#define UART_RSA_SRR_Rx_FIFO_NHFL (1 << 4)
/* Rx FIFO is not half full (1) */
#define UART_RSA_SRR_Rx_FIFO_NFUL (1 << 5)
/* Rx FIFO is not full (1) */
#define UART_RSA_SRR_Rx_TOUT (1 << 6)
/* Character reception timeout occurred (1) */
#define UART_RSA_SRR_TIMER (1 << 7)
/* Timer interrupt occurred */
#define UART_RSA_FRR ((UART_RSA_BASE) + 2)
/* OUT: FIFO Reset Register */
#define UART_RSA_TIVSR ((UART_RSA_BASE) + 3)
/* I/O: Timer Interval Value Set Register */
#define UART_RSA_TCR ((UART_RSA_BASE) + 4)
/* OUT: Timer Control Register */
#define UART_RSA_TCR_SWITCH (1 << 0)
/* Timer on */
/*
* The RSA DSV/II board has two fixed clock frequencies. One is the
* standard rate, and the other is 8 times faster.
*/
#define SERIAL_RSA_BAUD_BASE (921600)
#define SERIAL_RSA_BAUD_BASE_LO (SERIAL_RSA_BAUD_BASE / 8)
/* Extra registers for TI DA8xx/66AK2x */
#define UART_DA830_PWREMU_MGMT 12
/* PWREMU_MGMT register bits */
#define UART_DA830_PWREMU_MGMT_FREE (1 << 0)
/* Free-running mode */
#define UART_DA830_PWREMU_MGMT_URRST (1 << 13)
/* Receiver reset/enable */
#define UART_DA830_PWREMU_MGMT_UTRST (1 << 14)
/* Transmitter reset/enable */
/*
* Extra serial register definitions for the internal UARTs
* in TI OMAP processors.
*/
#define OMAP1_UART1_BASE 0xfffb0000
#define OMAP1_UART2_BASE 0xfffb0800
#define OMAP1_UART3_BASE 0xfffb9800
#define UART_OMAP_MDR1 0x08
/* Mode definition register */
#define UART_OMAP_MDR2 0x09
/* Mode definition register 2 */
#define UART_OMAP_SCR 0x10
/* Supplementary control register */
#define UART_OMAP_SSR 0x11
/* Supplementary status register */
#define UART_OMAP_EBLR 0x12
/* BOF length register */
#define UART_OMAP_OSC_12M_SEL 0x13
/* OMAP1510 12MHz osc select */
#define UART_OMAP_MVER 0x14
/* Module version register */
#define UART_OMAP_SYSC 0x15
/* System configuration register */
#define UART_OMAP_SYSS 0x16
/* System status register */
#define UART_OMAP_WER 0x17
/* Wake-up enable register */
#define UART_OMAP_TX_LVL 0x1a
/* TX FIFO level register */
/*
* These are the definitions for the MDR1 register
*/
#define UART_OMAP_MDR1_16X_MODE 0x00
/* UART 16x mode */
#define UART_OMAP_MDR1_SIR_MODE 0x01
/* SIR mode */
#define UART_OMAP_MDR1_16X_ABAUD_MODE 0x02
/* UART 16x auto-baud */
#define UART_OMAP_MDR1_13X_MODE 0x03
/* UART 13x mode */
#define UART_OMAP_MDR1_MIR_MODE 0x04
/* MIR mode */
#define UART_OMAP_MDR1_FIR_MODE 0x05
/* FIR mode */
#define UART_OMAP_MDR1_CIR_MODE 0x06
/* CIR mode */
#define UART_OMAP_MDR1_DISABLE 0x07
/* Disable (default state) */
/*
* These are definitions for the Altera ALTR_16550_F32/F64/F128
* Normalized from 0x100 to 0x40 because of shift by 2 (32 bit regs).
*/
#define UART_ALTR_AFR 0x40
/* Additional Features Register */
#define UART_ALTR_EN_TXFIFO_LW 0x01
/* Enable the TX FIFO Low Watermark */
#define UART_ALTR_TX_LOW 0x41
/* Tx FIFO Low Watermark */
#endif /* _LINUX_SERIAL_REG_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 533 | 47.25% | 7 | 23.33% |
| Russell King | 368 | 32.62% | 2 | 6.67% |
| Tony Lindgren | 58 | 5.14% | 2 | 6.67% |
| Andrei Emeltchenko | 52 | 4.61% | 2 | 6.67% |
| David Lechner | 21 | 1.86% | 1 | 3.33% |
| Yoshihiro Yunomae | 16 | 1.42% | 1 | 3.33% |
| Thor Thayer | 16 | 1.42% | 1 | 3.33% |
| Felipe Balbi | 16 | 1.42% | 2 | 6.67% |
| Holger Schurig | 8 | 0.71% | 1 | 3.33% |
| Stephen Warren | 6 | 0.53% | 2 | 6.67% |
| Marc St-Jean | 5 | 0.44% | 1 | 3.33% |
| Sören Holm | 5 | 0.44% | 1 | 3.33% |
| Sebastian Andrzej Siewior | 5 | 0.44% | 1 | 3.33% |
| Kevin Hilman | 5 | 0.44% | 1 | 3.33% |
| Corey Minyard | 5 | 0.44% | 1 | 3.33% |
| André Goddard Rosa | 4 | 0.35% | 1 | 3.33% |
| Michal Janusz Miroslaw | 2 | 0.18% | 1 | 3.33% |
| Linus Torvalds | 2 | 0.18% | 1 | 3.33% |
| Vijay Rai | 1 | 0.09% | 1 | 3.33% |
| Total | 1128 | 100.00% | 30 | 100.00% |
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