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Commit 40303111 authored by Russell King's avatar Russell King
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[SERIAL] serial_reg.h update. 

This includes a fuller definition of the 8250 and compatible bits,
and adding notes where the definition varies between different
chips.

This also fixes the following build error:

drivers/serial/8250.c:185: error: `UART_FCR_R_TRIG_10'
parent 0dbd84c6
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Showing with 146 additions and 133 deletions
include/linux/serial_reg.h
View file @ 40303111
......@@ -14,47 +14,63 @@
#ifndef _LINUX_SERIAL_REG_H
#define _LINUX_SERIAL_REG_H
#define UART_RX 0 /* In: Receive buffer (DLAB=0) */
#define UART_TX 0 /* 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 */
/*
* DLAB=0
*/
#define UART_RX 0 /* In: Receive buffer */
#define UART_TX 0 /* Out: Transmit buffer */
#define UART_DLM 1 /* Out: Divisor Latch High (DLAB=1) */
#define UART_IER 1 /* Out: Interrupt Enable Register */
#define UART_FCTR 1 /* (LCR=BF) Feature Control Register
* XR16C85x only */
#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_FCR 2 /* Out: FIFO Control Register */
#define UART_EFR 2 /* I/O: Extended Features Register */
/* (DLAB=1, 16C660 only) */
#define UART_LCR 3 /* Out: Line Control Register */
#define UART_MCR 4 /* Out: Modem Control Register */
#define UART_LSR 5 /* In: Line Status Register */
#define UART_MSR 6 /* In: Modem Status Register */
#define UART_SCR 7 /* I/O: Scratch Register */
#define UART_EMSR 7 /* (LCR=BF) Extended Mode Select Register
* FCTR bit 6 selects SCR or EMSR
* XR16c85x only */
#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 FIFO Control Register
* (16650 only)
*/
#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
*/
#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 redefinitions */
/* 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 */
......@@ -63,12 +79,10 @@
#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 */
/* TI 16750 definitions */
#define UART_FCR7_64BYTE 0x20 /* Go into 64 byte mode */
#define UART_FCR7_64BYTE 0x20 /* Go into 64 byte mode (TI16C750) */
#define UART_LCR 3 /* Out: Line Control Register */
/*
* 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.
*/
......@@ -77,15 +91,24 @@
#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_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 */
/*
* These are the definitions for the Line Status Register
*/
#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_TEMT 0x40 /* Transmitter empty */
#define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */
#define UART_LSR_BI 0x10 /* Break interrupt indicator */
......@@ -94,52 +117,91 @@
#define UART_LSR_OE 0x02 /* Overrun error indicator */
#define UART_LSR_DR 0x01 /* Receiver data ready */
#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 */
/*
* These are the definitions for the Interrupt Identification Register
* DLAB=1
*/
#define UART_IIR_NO_INT 0x01 /* No interrupts pending */
#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
#define UART_DLL 0 /* Out: Divisor Latch Low */
#define UART_DLM 1 /* Out: Divisor Latch High */
#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 */
/*
* LCR=0xBF (or DLAB=1 for 16C660)
*/
#define UART_EFR 2 /* I/O: Extended Features Register */
#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
*/
/*
* These are the definitions for the Interrupt Enable Register
* LCR=0xBF, TI16C752, ST16650, ST16650A, ST16654
*/
#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 */
#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 */
/*
* Sleep mode for ST16650 and TI16750.
* Note that for 16650, EFR-bit 4 must be selected as well.
* EFR[4]=1 MCR[6]=1, TI16C752
*/
#define UART_IERX_SLEEP 0x10 /* Enable sleep mode */
#define UART_TI752_TCR 6 /* I/O: transmission control register */
#define UART_TI752_TLR 7 /* I/O: trigger level register */
/*
* These are the definitions for the Modem Control Register
* LCR=0xBF, XR16C85x
*/
#define UART_MCR_AFE 0x20 /* Enable auto-RTS/CTS (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_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 */
/*
* These are the definitions for the Modem Status Register
* LCR=0xBF, FCTR[6]=1
*/
#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_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
......@@ -156,17 +218,8 @@
#define UART_FCR_PXAR16 0x80 /* receive FIFO treshold = 16 */
#define UART_FCR_PXAR32 0xc0 /* receive FIFO treshold = 32 */
/*
* These are the definitions for the Extended Features Register
* (StarTech 16C660 only, when DLAB=1)
*/
#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
*/
/*
* These register definitions are for the 16C950
......@@ -203,47 +256,7 @@
#define UART_ACR_ICRRD 0x40 /* ICR Read enable */
#define UART_ACR_ASREN 0x80 /* Additional status enable */
/*
* These are the definitions for the Feature Control Register
* (XR16C85x only, when LCR=bf; doubles with the Interrupt Enable
* Register, UART register #1)
*/
#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 */
/*
* These are the definitions for the Enhanced Mode Select Register
* (XR16C85x only, when LCR=bf and FCTR bit 6=1; doubles with the
* Scratch register, UART register #7)
*/
#define UART_EMSR_FIFO_COUNT 0x01 /* Rx/Tx select */
#define UART_EMSR_ALT_COUNT 0x02 /* Alternating count select */
/*
* These are the definitions for the Programmable Trigger
* Register (XR16C85x only, when LCR=bf; doubles with the UART RX/TX
* register, UART register #0)
*/
#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
/*
* These definitions are for the RSA-DV II/S card, from
......
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