1 /* 2 * include/linux/serial_reg.h 3 * 4 * Copyright (C) 1992, 1994 by Theodore Ts'o. 5 * 6 * Redistribution of this file is permitted under the terms of the GNU 7 * Public License (GPL) 8 * 9 * These are the UART port assignments, expressed as offsets from the base 10 * register. These assignments should hold for any serial port based on 11 * a 8250, 16450, or 16550(A). 12 */ 13 14 #ifndef _LINUX_SERIAL_REG_H 15 #define _LINUX_SERIAL_REG_H 16 17 /* 18 * DLAB=0 19 */ 20 #define UART_RX 0 /* In: Receive buffer */ 21 #define UART_TX 0 /* Out: Transmit buffer */ 22 23 #define UART_IER 1 /* Out: Interrupt Enable Register */ 24 #define UART_IER_MSI 0x08 /* Enable Modem status interrupt */ 25 #define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */ 26 #define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */ 27 #define UART_IER_RDI 0x01 /* Enable receiver data interrupt */ 28 /* 29 * Sleep mode for ST16650 and TI16750. For the ST16650, EFR[4]=1 30 */ 31 #define UART_IERX_SLEEP 0x10 /* Enable sleep mode */ 32 33 #define UART_IIR 2 /* In: Interrupt ID Register */ 34 #define UART_IIR_NO_INT 0x01 /* No interrupts pending */ 35 #define UART_IIR_ID 0x06 /* Mask for the interrupt ID */ 36 #define UART_IIR_MSI 0x00 /* Modem status interrupt */ 37 #define UART_IIR_THRI 0x02 /* Transmitter holding register empty */ 38 #define UART_IIR_RDI 0x04 /* Receiver data interrupt */ 39 #define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */ 40 41 #define UART_FCR 2 /* Out: FIFO Control Register */ 42 #define UART_FCR_ENABLE_FIFO 0x01 /* Enable the FIFO */ 43 #define UART_FCR_CLEAR_RCVR 0x02 /* Clear the RCVR FIFO */ 44 #define UART_FCR_CLEAR_XMIT 0x04 /* Clear the XMIT FIFO */ 45 #define UART_FCR_DMA_SELECT 0x08 /* For DMA applications */ 46 /* 47 * Note: The FIFO trigger levels are chip specific: 48 * RX:76 = 00 01 10 11 TX:54 = 00 01 10 11 49 * PC16550D: 1 4 8 14 xx xx xx xx 50 * TI16C550A: 1 4 8 14 xx xx xx xx 51 * TI16C550C: 1 4 8 14 xx xx xx xx 52 * ST16C550: 1 4 8 14 xx xx xx xx 53 * ST16C650: 8 16 24 28 16 8 24 30 PORT_16650V2 54 * NS16C552: 1 4 8 14 xx xx xx xx 55 * ST16C654: 8 16 56 60 8 16 32 56 PORT_16654 56 * TI16C750: 1 16 32 56 xx xx xx xx PORT_16750 57 * TI16C752: 8 16 56 60 8 16 32 56 58 */ 59 #define UART_FCR_R_TRIG_00 0x00 60 #define UART_FCR_R_TRIG_01 0x40 61 #define UART_FCR_R_TRIG_10 0x80 62 #define UART_FCR_R_TRIG_11 0xc0 63 #define UART_FCR_T_TRIG_00 0x00 64 #define UART_FCR_T_TRIG_01 0x10 65 #define UART_FCR_T_TRIG_10 0x20 66 #define UART_FCR_T_TRIG_11 0x30 67 68 #define UART_FCR_TRIGGER_MASK 0xC0 /* Mask for the FIFO trigger range */ 69 #define UART_FCR_TRIGGER_1 0x00 /* Mask for trigger set at 1 */ 70 #define UART_FCR_TRIGGER_4 0x40 /* Mask for trigger set at 4 */ 71 #define UART_FCR_TRIGGER_8 0x80 /* Mask for trigger set at 8 */ 72 #define UART_FCR_TRIGGER_14 0xC0 /* Mask for trigger set at 14 */ 73 /* 16650 definitions */ 74 #define UART_FCR6_R_TRIGGER_8 0x00 /* Mask for receive trigger set at 1 */ 75 #define UART_FCR6_R_TRIGGER_16 0x40 /* Mask for receive trigger set at 4 */ 76 #define UART_FCR6_R_TRIGGER_24 0x80 /* Mask for receive trigger set at 8 */ 77 #define UART_FCR6_R_TRIGGER_28 0xC0 /* Mask for receive trigger set at 14 */ 78 #define UART_FCR6_T_TRIGGER_16 0x00 /* Mask for transmit trigger set at 16 */ 79 #define UART_FCR6_T_TRIGGER_8 0x10 /* Mask for transmit trigger set at 8 */ 80 #define UART_FCR6_T_TRIGGER_24 0x20 /* Mask for transmit trigger set at 24 */ 81 #define UART_FCR6_T_TRIGGER_30 0x30 /* Mask for transmit trigger set at 30 */ 82 #define UART_FCR7_64BYTE 0x20 /* Go into 64 byte mode (TI16C750) */ 83 84 #define UART_LCR 3 /* Out: Line Control Register */ 85 /* 86 * Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting 87 * UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits. 88 */ 89 #define UART_LCR_DLAB 0x80 /* Divisor latch access bit */ 90 #define UART_LCR_SBC 0x40 /* Set break control */ 91 #define UART_LCR_SPAR 0x20 /* Stick parity (?) */ 92 #define UART_LCR_EPAR 0x10 /* Even parity select */ 93 #define UART_LCR_PARITY 0x08 /* Parity Enable */ 94 #define UART_LCR_STOP 0x04 /* Stop bits: 0=1 bit, 1=2 bits */ 95 #define UART_LCR_WLEN5 0x00 /* Wordlength: 5 bits */ 96 #define UART_LCR_WLEN6 0x01 /* Wordlength: 6 bits */ 97 #define UART_LCR_WLEN7 0x02 /* Wordlength: 7 bits */ 98 #define UART_LCR_WLEN8 0x03 /* Wordlength: 8 bits */ 99 100 #define UART_MCR 4 /* Out: Modem Control Register */ 101 #define UART_MCR_CLKSEL 0x80 /* Divide clock by 4 (TI16C752, EFR[4]=1) */ 102 #define UART_MCR_TCRTLR 0x40 /* Access TCR/TLR (TI16C752, EFR[4]=1) */ 103 #define UART_MCR_XONANY 0x20 /* Enable Xon Any (TI16C752, EFR[4]=1) */ 104 #define UART_MCR_AFE 0x20 /* Enable auto-RTS/CTS (TI16C550C/TI16C750) */ 105 #define UART_MCR_LOOP 0x10 /* Enable loopback test mode */ 106 #define UART_MCR_OUT2 0x08 /* Out2 complement */ 107 #define UART_MCR_OUT1 0x04 /* Out1 complement */ 108 #define UART_MCR_RTS 0x02 /* RTS complement */ 109 #define UART_MCR_DTR 0x01 /* DTR complement */ 110 111 #define UART_LSR 5 /* In: Line Status Register */ 112 #define UART_LSR_TEMT 0x40 /* Transmitter empty */ 113 #define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */ 114 #define UART_LSR_BI 0x10 /* Break interrupt indicator */ 115 #define UART_LSR_FE 0x08 /* Frame error indicator */ 116 #define UART_LSR_PE 0x04 /* Parity error indicator */ 117 #define UART_LSR_OE 0x02 /* Overrun error indicator */ 118 #define UART_LSR_DR 0x01 /* Receiver data ready */ 119 120 #define UART_MSR 6 /* In: Modem Status Register */ 121 #define UART_MSR_DCD 0x80 /* Data Carrier Detect */ 122 #define UART_MSR_RI 0x40 /* Ring Indicator */ 123 #define UART_MSR_DSR 0x20 /* Data Set Ready */ 124 #define UART_MSR_CTS 0x10 /* Clear to Send */ 125 #define UART_MSR_DDCD 0x08 /* Delta DCD */ 126 #define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */ 127 #define UART_MSR_DDSR 0x02 /* Delta DSR */ 128 #define UART_MSR_DCTS 0x01 /* Delta CTS */ 129 #define UART_MSR_ANY_DELTA 0x0F /* Any of the delta bits! */ 130 131 #define UART_SCR 7 /* I/O: Scratch Register */ 132 133 /* 134 * DLAB=1 135 */ 136 #define UART_DLL 0 /* Out: Divisor Latch Low */ 137 #define UART_DLM 1 /* Out: Divisor Latch High */ 138 139 /* 140 * LCR=0xBF (or DLAB=1 for 16C660) 141 */ 142 #define UART_EFR 2 /* I/O: Extended Features Register */ 143 #define UART_EFR_CTS 0x80 /* CTS flow control */ 144 #define UART_EFR_RTS 0x40 /* RTS flow control */ 145 #define UART_EFR_SCD 0x20 /* Special character detect */ 146 #define UART_EFR_ECB 0x10 /* Enhanced control bit */ 147 /* 148 * the low four bits control software flow control 149 */ 150 151 /* 152 * LCR=0xBF, TI16C752, ST16650, ST16650A, ST16654 153 */ 154 #define UART_XON1 4 /* I/O: Xon character 1 */ 155 #define UART_XON2 5 /* I/O: Xon character 2 */ 156 #define UART_XOFF1 6 /* I/O: Xoff character 1 */ 157 #define UART_XOFF2 7 /* I/O: Xoff character 2 */ 158 159 /* 160 * EFR[4]=1 MCR[6]=1, TI16C752 161 */ 162 #define UART_TI752_TCR 6 /* I/O: transmission control register */ 163 #define UART_TI752_TLR 7 /* I/O: trigger level register */ 164 165 /* 166 * LCR=0xBF, XR16C85x 167 */ 168 #define UART_TRG 0 /* FCTR bit 7 selects Rx or Tx 169 * In: Fifo count 170 * Out: Fifo custom trigger levels */ 171 /* 172 * These are the definitions for the Programmable Trigger Register 173 */ 174 #define UART_TRG_1 0x01 175 #define UART_TRG_4 0x04 176 #define UART_TRG_8 0x08 177 #define UART_TRG_16 0x10 178 #define UART_TRG_32 0x20 179 #define UART_TRG_64 0x40 180 #define UART_TRG_96 0x60 181 #define UART_TRG_120 0x78 182 #define UART_TRG_128 0x80 183 184 #define UART_FCTR 1 /* Feature Control Register */ 185 #define UART_FCTR_RTS_NODELAY 0x00 /* RTS flow control delay */ 186 #define UART_FCTR_RTS_4DELAY 0x01 187 #define UART_FCTR_RTS_6DELAY 0x02 188 #define UART_FCTR_RTS_8DELAY 0x03 189 #define UART_FCTR_IRDA 0x04 /* IrDa data encode select */ 190 #define UART_FCTR_TX_INT 0x08 /* Tx interrupt type select */ 191 #define UART_FCTR_TRGA 0x00 /* Tx/Rx 550 trigger table select */ 192 #define UART_FCTR_TRGB 0x10 /* Tx/Rx 650 trigger table select */ 193 #define UART_FCTR_TRGC 0x20 /* Tx/Rx 654 trigger table select */ 194 #define UART_FCTR_TRGD 0x30 /* Tx/Rx 850 programmable trigger select */ 195 #define UART_FCTR_SCR_SWAP 0x40 /* Scratch pad register swap */ 196 #define UART_FCTR_RX 0x00 /* Programmable trigger mode select */ 197 #define UART_FCTR_TX 0x80 /* Programmable trigger mode select */ 198 199 /* 200 * LCR=0xBF, FCTR[6]=1 201 */ 202 #define UART_EMSR 7 /* Extended Mode Select Register */ 203 #define UART_EMSR_FIFO_COUNT 0x01 /* Rx/Tx select */ 204 #define UART_EMSR_ALT_COUNT 0x02 /* Alternating count select */ 205 206 /* 207 * The Intel XScale on-chip UARTs define these bits 208 */ 209 #define UART_IER_DMAE 0x80 /* DMA Requests Enable */ 210 #define UART_IER_UUE 0x40 /* UART Unit Enable */ 211 #define UART_IER_NRZE 0x20 /* NRZ coding Enable */ 212 #define UART_IER_RTOIE 0x10 /* Receiver Time Out Interrupt Enable */ 213 214 #define UART_IIR_TOD 0x08 /* Character Timeout Indication Detected */ 215 216 #define UART_FCR_PXAR1 0x00 /* receive FIFO treshold = 1 */ 217 #define UART_FCR_PXAR8 0x40 /* receive FIFO treshold = 8 */ 218 #define UART_FCR_PXAR16 0x80 /* receive FIFO treshold = 16 */ 219 #define UART_FCR_PXAR32 0xc0 /* receive FIFO treshold = 32 */ 220 221 222 223 224 /* 225 * These register definitions are for the 16C950 226 */ 227 #define UART_ASR 0x01 /* Additional Status Register */ 228 #define UART_RFL 0x03 /* Receiver FIFO level */ 229 #define UART_TFL 0x04 /* Transmitter FIFO level */ 230 #define UART_ICR 0x05 /* Index Control Register */ 231 232 /* The 16950 ICR registers */ 233 #define UART_ACR 0x00 /* Additional Control Register */ 234 #define UART_CPR 0x01 /* Clock Prescalar Register */ 235 #define UART_TCR 0x02 /* Times Clock Register */ 236 #define UART_CKS 0x03 /* Clock Select Register */ 237 #define UART_TTL 0x04 /* Transmitter Interrupt Trigger Level */ 238 #define UART_RTL 0x05 /* Receiver Interrupt Trigger Level */ 239 #define UART_FCL 0x06 /* Flow Control Level Lower */ 240 #define UART_FCH 0x07 /* Flow Control Level Higher */ 241 #define UART_ID1 0x08 /* ID #1 */ 242 #define UART_ID2 0x09 /* ID #2 */ 243 #define UART_ID3 0x0A /* ID #3 */ 244 #define UART_REV 0x0B /* Revision */ 245 #define UART_CSR 0x0C /* Channel Software Reset */ 246 #define UART_NMR 0x0D /* Nine-bit Mode Register */ 247 #define UART_CTR 0xFF 248 249 /* 250 * The 16C950 Additional Control Register 251 */ 252 #define UART_ACR_RXDIS 0x01 /* Receiver disable */ 253 #define UART_ACR_TXDIS 0x02 /* Transmitter disable */ 254 #define UART_ACR_DSRFC 0x04 /* DSR Flow Control */ 255 #define UART_ACR_TLENB 0x20 /* 950 trigger levels enable */ 256 #define UART_ACR_ICRRD 0x40 /* ICR Read enable */ 257 #define UART_ACR_ASREN 0x80 /* Additional status enable */ 258 259 260 261 /* 262 * These definitions are for the RSA-DV II/S card, from 263 * 264 * Kiyokazu SUTO <suto@ks-and-ks.ne.jp> 265 */ 266 267 #define UART_RSA_BASE (-8) 268 269 #define UART_RSA_MSR ((UART_RSA_BASE) + 0) /* I/O: Mode Select Register */ 270 271 #define UART_RSA_MSR_SWAP (1 << 0) /* Swap low/high 8 bytes in I/O port addr */ 272 #define UART_RSA_MSR_FIFO (1 << 2) /* Enable the external FIFO */ 273 #define UART_RSA_MSR_FLOW (1 << 3) /* Enable the auto RTS/CTS flow control */ 274 #define UART_RSA_MSR_ITYP (1 << 4) /* Level (1) / Edge triger (0) */ 275 276 #define UART_RSA_IER ((UART_RSA_BASE) + 1) /* I/O: Interrupt Enable Register */ 277 278 #define UART_RSA_IER_Rx_FIFO_H (1 << 0) /* Enable Rx FIFO half full int. */ 279 #define UART_RSA_IER_Tx_FIFO_H (1 << 1) /* Enable Tx FIFO half full int. */ 280 #define UART_RSA_IER_Tx_FIFO_E (1 << 2) /* Enable Tx FIFO empty int. */ 281 #define UART_RSA_IER_Rx_TOUT (1 << 3) /* Enable char receive timeout int */ 282 #define UART_RSA_IER_TIMER (1 << 4) /* Enable timer interrupt */ 283 284 #define UART_RSA_SRR ((UART_RSA_BASE) + 2) /* IN: Status Read Register */ 285 286 #define UART_RSA_SRR_Tx_FIFO_NEMP (1 << 0) /* Tx FIFO is not empty (1) */ 287 #define UART_RSA_SRR_Tx_FIFO_NHFL (1 << 1) /* Tx FIFO is not half full (1) */ 288 #define UART_RSA_SRR_Tx_FIFO_NFUL (1 << 2) /* Tx FIFO is not full (1) */ 289 #define UART_RSA_SRR_Rx_FIFO_NEMP (1 << 3) /* Rx FIFO is not empty (1) */ 290 #define UART_RSA_SRR_Rx_FIFO_NHFL (1 << 4) /* Rx FIFO is not half full (1) */ 291 #define UART_RSA_SRR_Rx_FIFO_NFUL (1 << 5) /* Rx FIFO is not full (1) */ 292 #define UART_RSA_SRR_Rx_TOUT (1 << 6) /* Character reception timeout occurred (1) */ 293 #define UART_RSA_SRR_TIMER (1 << 7) /* Timer interrupt occurred */ 294 295 #define UART_RSA_FRR ((UART_RSA_BASE) + 2) /* OUT: FIFO Reset Register */ 296 297 #define UART_RSA_TIVSR ((UART_RSA_BASE) + 3) /* I/O: Timer Interval Value Set Register */ 298 299 #define UART_RSA_TCR ((UART_RSA_BASE) + 4) /* OUT: Timer Control Register */ 300 301 #define UART_RSA_TCR_SWITCH (1 << 0) /* Timer on */ 302 303 /* 304 * The RSA DSV/II board has two fixed clock frequencies. One is the 305 * standard rate, and the other is 8 times faster. 306 */ 307 #define SERIAL_RSA_BAUD_BASE (921600) 308 #define SERIAL_RSA_BAUD_BASE_LO (SERIAL_RSA_BAUD_BASE / 8) 309 310 /* 311 * Extra serial register definitions for the internal UARTs 312 * in TI OMAP processors. 313 */ 314 #define UART_OMAP_MDR1 0x08 /* Mode definition register */ 315 #define UART_OMAP_MDR2 0x09 /* Mode definition register 2 */ 316 #define UART_OMAP_SCR 0x10 /* Supplementary control register */ 317 #define UART_OMAP_SSR 0x11 /* Supplementary status register */ 318 #define UART_OMAP_EBLR 0x12 /* BOF length register */ 319 #define UART_OMAP_OSC_12M_SEL 0x13 /* OMAP1510 12MHz osc select */ 320 #define UART_OMAP_MVER 0x14 /* Module version register */ 321 #define UART_OMAP_SYSC 0x15 /* System configuration register */ 322 #define UART_OMAP_SYSS 0x16 /* System status register */ 323 324 #endif /* _LINUX_SERIAL_REG_H */ 325 326