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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 | /* * 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 #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 */ #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_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 */ /* * These are the definitions for the FIFO Control Register * (16650 only) */ #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 */ #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 */ #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 */ /* TI 16750 definitions */ #define UART_FCR7_64BYTE 0x20 /* Go into 64 byte mode */ /* * 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 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 */ /* * 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 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. * Note that for 16650, EFR-bit 4 must be selected as well. */ #define UART_IERX_SLEEP 0x10 /* Enable sleep mode */ /* * These are the definitions for the Modem Control Register */ #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 */ /* * These are the definitions for the 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! */ /* * 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 */ #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 Reigster */ #define UART_ACR_RXDIS 0x01 /* Receiver disable */ #define UART_ACR_TXDIS 0x02 /* Receiver 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 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 * * 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) #endif /* _LINUX_SERIAL_REG_H */ |