litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'arch/um/kernel/um_arch.c')

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/* * 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 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 */ #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) */ #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 */ /* * Intel MID on-chip HSU (High Speed UART) defined bits */ #define UART_FCR_HSU_64_1B 0x00 /* receive FIFO treshold = 1 */ #define UART_FCR_HSU_64_16B 0x40 /* receive FIFO treshold = 16 */ #define UART_FCR_HSU_64_32B 0x80 /* receive FIFO treshold = 32 */ #define UART_FCR_HSU_64_56B 0xc0 /* receive FIFO treshold = 56 */ #define UART_FCR_HSU_16_1B 0x00 /* receive FIFO treshold = 1 */ #define UART_FCR_HSU_16_4B 0x40 /* receive FIFO treshold = 4 */ #define UART_FCR_HSU_16_8B 0x80 /* receive FIFO treshold = 8 */ #define UART_FCR_HSU_16_14B 0xc0 /* receive FIFO treshold = 14 */ #define UART_FCR_HSU_64B_FIFO 0x20 /* chose 64 bytes FIFO */ #define UART_FCR_HSU_16B_FIFO 0x00 /* chose 16 bytes FIFO */ #define UART_FCR_HALF_EMPT_TXI 0x00 /* trigger TX_EMPT IRQ for half empty */ #define UART_FCR_FULL_EMPT_TXI 0x08 /* trigger TX_EMPT IRQ for full empty */ /* * 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 */


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