1 // SPDX-License-Identifier: GPL-2.0+ 2 /************************************************************************ 3 * Copyright 2003 Digi International (www.digi.com) 4 * 5 * Copyright (C) 2004 IBM Corporation. All rights reserved. 6 * 7 * Contact Information: 8 * Scott H Kilau <Scott_Kilau@digi.com> 9 * Wendy Xiong <wendyx@us.ibm.com> 10 * 11 ***********************************************************************/ 12 13 #ifndef __JSM_DRIVER_H 14 #define __JSM_DRIVER_H 15 16 #include <linux/kernel.h> 17 #include <linux/types.h> /* To pick up the varions Linux types */ 18 #include <linux/tty.h> 19 #include <linux/serial_core.h> 20 #include <linux/device.h> 21 22 /* 23 * Debugging levels can be set using debug insmod variable 24 * They can also be compiled out completely. 25 */ 26 enum { 27 DBG_INIT = 0x01, 28 DBG_BASIC = 0x02, 29 DBG_CORE = 0x04, 30 DBG_OPEN = 0x08, 31 DBG_CLOSE = 0x10, 32 DBG_READ = 0x20, 33 DBG_WRITE = 0x40, 34 DBG_IOCTL = 0x80, 35 DBG_PROC = 0x100, 36 DBG_PARAM = 0x200, 37 DBG_PSCAN = 0x400, 38 DBG_EVENT = 0x800, 39 DBG_DRAIN = 0x1000, 40 DBG_MSIGS = 0x2000, 41 DBG_MGMT = 0x4000, 42 DBG_INTR = 0x8000, 43 DBG_CARR = 0x10000, 44 }; 45 46 #define jsm_dbg(nlevel, pdev, fmt, ...) \ 47 do { \ 48 if (DBG_##nlevel & jsm_debug) \ 49 dev_dbg(pdev->dev, fmt, ##__VA_ARGS__); \ 50 } while (0) 51 52 #define MAXLINES 256 53 #define MAXPORTS 8 54 #define MAX_STOPS_SENT 5 55 56 /* Board ids */ 57 #define PCI_DEVICE_ID_CLASSIC_4 0x0028 58 #define PCI_DEVICE_ID_CLASSIC_8 0x0029 59 #define PCI_DEVICE_ID_CLASSIC_4_422 0x00D0 60 #define PCI_DEVICE_ID_CLASSIC_8_422 0x00D1 61 #define PCI_DEVICE_ID_NEO_4 0x00B0 62 #define PCI_DEVICE_ID_NEO_1_422 0x00CC 63 #define PCI_DEVICE_ID_NEO_1_422_485 0x00CD 64 #define PCI_DEVICE_ID_NEO_2_422_485 0x00CE 65 #define PCIE_DEVICE_ID_NEO_8 0x00F0 66 #define PCIE_DEVICE_ID_NEO_4 0x00F1 67 #define PCIE_DEVICE_ID_NEO_4RJ45 0x00F2 68 #define PCIE_DEVICE_ID_NEO_8RJ45 0x00F3 69 70 /* Board type definitions */ 71 72 #define T_NEO 0000 73 #define T_CLASSIC 0001 74 #define T_PCIBUS 0400 75 76 /* Board State Definitions */ 77 78 #define BD_RUNNING 0x0 79 #define BD_REASON 0x7f 80 #define BD_NOTFOUND 0x1 81 #define BD_NOIOPORT 0x2 82 #define BD_NOMEM 0x3 83 #define BD_NOBIOS 0x4 84 #define BD_NOFEP 0x5 85 #define BD_FAILED 0x6 86 #define BD_ALLOCATED 0x7 87 #define BD_TRIBOOT 0x8 88 #define BD_BADKME 0x80 89 90 91 /* 4 extra for alignment play space */ 92 #define WRITEBUFLEN ((4096) + 4) 93 94 #define JSM_VERSION "jsm: 1.2-1-INKERNEL" 95 #define JSM_PARTNUM "40002438_A-INKERNEL" 96 97 struct jsm_board; 98 struct jsm_channel; 99 100 /************************************************************************ 101 * Per board operations structure * 102 ************************************************************************/ 103 struct board_ops { 104 irq_handler_t intr; 105 void (*uart_init)(struct jsm_channel *ch); 106 void (*uart_off)(struct jsm_channel *ch); 107 void (*param)(struct jsm_channel *ch); 108 void (*assert_modem_signals)(struct jsm_channel *ch); 109 void (*flush_uart_write)(struct jsm_channel *ch); 110 void (*flush_uart_read)(struct jsm_channel *ch); 111 void (*disable_receiver)(struct jsm_channel *ch); 112 void (*enable_receiver)(struct jsm_channel *ch); 113 void (*send_break)(struct jsm_channel *ch); 114 void (*clear_break)(struct jsm_channel *ch); 115 void (*send_start_character)(struct jsm_channel *ch); 116 void (*send_stop_character)(struct jsm_channel *ch); 117 void (*copy_data_from_queue_to_uart)(struct jsm_channel *ch); 118 u32 (*get_uart_bytes_left)(struct jsm_channel *ch); 119 void (*send_immediate_char)(struct jsm_channel *ch, unsigned char); 120 }; 121 122 123 /* 124 * Per-board information 125 */ 126 struct jsm_board 127 { 128 int boardnum; /* Board number: 0-32 */ 129 130 int type; /* Type of board */ 131 u8 rev; /* PCI revision ID */ 132 struct pci_dev *pci_dev; 133 u32 maxports; /* MAX ports this board can handle */ 134 135 spinlock_t bd_intr_lock; /* Used to protect the poller tasklet and 136 * the interrupt routine from each other. 137 */ 138 139 u32 nasync; /* Number of ports on card */ 140 141 u32 irq; /* Interrupt request number */ 142 143 u64 membase; /* Start of base memory of the card */ 144 u64 membase_end; /* End of base memory of the card */ 145 146 u8 __iomem *re_map_membase;/* Remapped memory of the card */ 147 148 u64 iobase; /* Start of io base of the card */ 149 u64 iobase_end; /* End of io base of the card */ 150 151 u32 bd_uart_offset; /* Space between each UART */ 152 153 struct jsm_channel *channels[MAXPORTS]; /* array of pointers to our channels. */ 154 155 u32 bd_dividend; /* Board/UARTs specific dividend */ 156 157 struct board_ops *bd_ops; 158 159 struct list_head jsm_board_entry; 160 }; 161 162 /************************************************************************ 163 * Device flag definitions for ch_flags. 164 ************************************************************************/ 165 #define CH_PRON 0x0001 /* Printer on string */ 166 #define CH_STOP 0x0002 /* Output is stopped */ 167 #define CH_STOPI 0x0004 /* Input is stopped */ 168 #define CH_CD 0x0008 /* Carrier is present */ 169 #define CH_FCAR 0x0010 /* Carrier forced on */ 170 #define CH_HANGUP 0x0020 /* Hangup received */ 171 172 #define CH_RECEIVER_OFF 0x0040 /* Receiver is off */ 173 #define CH_OPENING 0x0080 /* Port in fragile open state */ 174 #define CH_CLOSING 0x0100 /* Port in fragile close state */ 175 #define CH_FIFO_ENABLED 0x0200 /* Port has FIFOs enabled */ 176 #define CH_TX_FIFO_EMPTY 0x0400 /* TX Fifo is completely empty */ 177 #define CH_TX_FIFO_LWM 0x0800 /* TX Fifo is below Low Water */ 178 #define CH_BREAK_SENDING 0x1000 /* Break is being sent */ 179 #define CH_LOOPBACK 0x2000 /* Channel is in lookback mode */ 180 #define CH_BAUD0 0x08000 /* Used for checking B0 transitions */ 181 182 /* Our Read/Error queue sizes */ 183 #define RQUEUEMASK 0x1FFF /* 8 K - 1 */ 184 #define EQUEUEMASK 0x1FFF /* 8 K - 1 */ 185 #define RQUEUESIZE (RQUEUEMASK + 1) 186 #define EQUEUESIZE RQUEUESIZE 187 188 189 /************************************************************************ 190 * Channel information structure. 191 ************************************************************************/ 192 struct jsm_channel { 193 struct uart_port uart_port; 194 struct jsm_board *ch_bd; /* Board structure pointer */ 195 196 spinlock_t ch_lock; /* provide for serialization */ 197 wait_queue_head_t ch_flags_wait; 198 199 u32 ch_portnum; /* Port number, 0 offset. */ 200 u32 ch_open_count; /* open count */ 201 u32 ch_flags; /* Channel flags */ 202 203 u64 ch_close_delay; /* How long we should drop RTS/DTR for */ 204 205 tcflag_t ch_c_iflag; /* channel iflags */ 206 tcflag_t ch_c_cflag; /* channel cflags */ 207 tcflag_t ch_c_oflag; /* channel oflags */ 208 tcflag_t ch_c_lflag; /* channel lflags */ 209 u8 ch_stopc; /* Stop character */ 210 u8 ch_startc; /* Start character */ 211 212 u8 ch_mostat; /* FEP output modem status */ 213 u8 ch_mistat; /* FEP input modem status */ 214 215 /* Pointers to the "mapped" UART structs */ 216 struct neo_uart_struct __iomem *ch_neo_uart; /* NEO card */ 217 struct cls_uart_struct __iomem *ch_cls_uart; /* Classic card */ 218 219 u8 ch_cached_lsr; /* Cached value of the LSR register */ 220 221 u8 *ch_rqueue; /* Our read queue buffer - malloc'ed */ 222 u16 ch_r_head; /* Head location of the read queue */ 223 u16 ch_r_tail; /* Tail location of the read queue */ 224 225 u8 *ch_equeue; /* Our error queue buffer - malloc'ed */ 226 u16 ch_e_head; /* Head location of the error queue */ 227 u16 ch_e_tail; /* Tail location of the error queue */ 228 229 u64 ch_rxcount; /* total of data received so far */ 230 u64 ch_txcount; /* total of data transmitted so far */ 231 232 u8 ch_r_tlevel; /* Receive Trigger level */ 233 u8 ch_t_tlevel; /* Transmit Trigger level */ 234 235 u8 ch_r_watermark; /* Receive Watermark */ 236 237 238 u32 ch_stops_sent; /* How many times I have sent a stop character 239 * to try to stop the other guy sending. 240 */ 241 u64 ch_err_parity; /* Count of parity errors on channel */ 242 u64 ch_err_frame; /* Count of framing errors on channel */ 243 u64 ch_err_break; /* Count of breaks on channel */ 244 u64 ch_err_overrun; /* Count of overruns on channel */ 245 246 u64 ch_xon_sends; /* Count of xons transmitted */ 247 u64 ch_xoff_sends; /* Count of xoffs transmitted */ 248 }; 249 250 /************************************************************************ 251 * Per channel/port Classic UART structures * 252 ************************************************************************ 253 * Base Structure Entries Usage Meanings to Host * 254 * * 255 * W = read write R = read only * 256 * U = Unused. * 257 ************************************************************************/ 258 259 struct cls_uart_struct { 260 u8 txrx; /* WR RHR/THR - Holding Reg */ 261 u8 ier; /* WR IER - Interrupt Enable Reg */ 262 u8 isr_fcr; /* WR ISR/FCR - Interrupt Status Reg/Fifo Control Reg*/ 263 u8 lcr; /* WR LCR - Line Control Reg */ 264 u8 mcr; /* WR MCR - Modem Control Reg */ 265 u8 lsr; /* WR LSR - Line Status Reg */ 266 u8 msr; /* WR MSR - Modem Status Reg */ 267 u8 spr; /* WR SPR - Scratch Pad Reg */ 268 }; 269 270 /* Where to read the interrupt register (8bits) */ 271 #define UART_CLASSIC_POLL_ADDR_OFFSET 0x40 272 273 #define UART_EXAR654_ENHANCED_REGISTER_SET 0xBF 274 275 #define UART_16654_FCR_TXTRIGGER_8 0x0 276 #define UART_16654_FCR_TXTRIGGER_16 0x10 277 #define UART_16654_FCR_TXTRIGGER_32 0x20 278 #define UART_16654_FCR_TXTRIGGER_56 0x30 279 280 #define UART_16654_FCR_RXTRIGGER_8 0x0 281 #define UART_16654_FCR_RXTRIGGER_16 0x40 282 #define UART_16654_FCR_RXTRIGGER_56 0x80 283 #define UART_16654_FCR_RXTRIGGER_60 0xC0 284 285 #define UART_IIR_CTSRTS 0x20 /* Received CTS/RTS change of state */ 286 #define UART_IIR_RDI_TIMEOUT 0x0C /* Receiver data TIMEOUT */ 287 288 /* 289 * These are the EXTENDED definitions for the Exar 654's Interrupt 290 * Enable Register. 291 */ 292 #define UART_EXAR654_EFR_ECB 0x10 /* Enhanced control bit */ 293 #define UART_EXAR654_EFR_IXON 0x2 /* Receiver compares Xon1/Xoff1 */ 294 #define UART_EXAR654_EFR_IXOFF 0x8 /* Transmit Xon1/Xoff1 */ 295 #define UART_EXAR654_EFR_RTSDTR 0x40 /* Auto RTS/DTR Flow Control Enable */ 296 #define UART_EXAR654_EFR_CTSDSR 0x80 /* Auto CTS/DSR Flow COntrol Enable */ 297 298 #define UART_EXAR654_XOFF_DETECT 0x1 /* Indicates whether chip saw an incoming XOFF char */ 299 #define UART_EXAR654_XON_DETECT 0x2 /* Indicates whether chip saw an incoming XON char */ 300 301 #define UART_EXAR654_IER_XOFF 0x20 /* Xoff Interrupt Enable */ 302 #define UART_EXAR654_IER_RTSDTR 0x40 /* Output Interrupt Enable */ 303 #define UART_EXAR654_IER_CTSDSR 0x80 /* Input Interrupt Enable */ 304 305 /************************************************************************ 306 * Per channel/port NEO UART structure * 307 ************************************************************************ 308 * Base Structure Entries Usage Meanings to Host * 309 * * 310 * W = read write R = read only * 311 * U = Unused. * 312 ************************************************************************/ 313 314 struct neo_uart_struct { 315 u8 txrx; /* WR RHR/THR - Holding Reg */ 316 u8 ier; /* WR IER - Interrupt Enable Reg */ 317 u8 isr_fcr; /* WR ISR/FCR - Interrupt Status Reg/Fifo Control Reg */ 318 u8 lcr; /* WR LCR - Line Control Reg */ 319 u8 mcr; /* WR MCR - Modem Control Reg */ 320 u8 lsr; /* WR LSR - Line Status Reg */ 321 u8 msr; /* WR MSR - Modem Status Reg */ 322 u8 spr; /* WR SPR - Scratch Pad Reg */ 323 u8 fctr; /* WR FCTR - Feature Control Reg */ 324 u8 efr; /* WR EFR - Enhanced Function Reg */ 325 u8 tfifo; /* WR TXCNT/TXTRG - Transmit FIFO Reg */ 326 u8 rfifo; /* WR RXCNT/RXTRG - Receive FIFO Reg */ 327 u8 xoffchar1; /* WR XOFF 1 - XOff Character 1 Reg */ 328 u8 xoffchar2; /* WR XOFF 2 - XOff Character 2 Reg */ 329 u8 xonchar1; /* WR XON 1 - Xon Character 1 Reg */ 330 u8 xonchar2; /* WR XON 2 - XOn Character 2 Reg */ 331 332 u8 reserved1[0x2ff - 0x200]; /* U Reserved by Exar */ 333 u8 txrxburst[64]; /* RW 64 bytes of RX/TX FIFO Data */ 334 u8 reserved2[0x37f - 0x340]; /* U Reserved by Exar */ 335 u8 rxburst_with_errors[64]; /* R 64 bytes of RX FIFO Data + LSR */ 336 }; 337 338 /* Where to read the extended interrupt register (32bits instead of 8bits) */ 339 #define UART_17158_POLL_ADDR_OFFSET 0x80 340 341 /* 342 * These are the redefinitions for the FCTR on the XR17C158, since 343 * Exar made them different than their earlier design. (XR16C854) 344 */ 345 346 /* These are only applicable when table D is selected */ 347 #define UART_17158_FCTR_RTS_NODELAY 0x00 348 #define UART_17158_FCTR_RTS_4DELAY 0x01 349 #define UART_17158_FCTR_RTS_6DELAY 0x02 350 #define UART_17158_FCTR_RTS_8DELAY 0x03 351 #define UART_17158_FCTR_RTS_12DELAY 0x12 352 #define UART_17158_FCTR_RTS_16DELAY 0x05 353 #define UART_17158_FCTR_RTS_20DELAY 0x13 354 #define UART_17158_FCTR_RTS_24DELAY 0x06 355 #define UART_17158_FCTR_RTS_28DELAY 0x14 356 #define UART_17158_FCTR_RTS_32DELAY 0x07 357 #define UART_17158_FCTR_RTS_36DELAY 0x16 358 #define UART_17158_FCTR_RTS_40DELAY 0x08 359 #define UART_17158_FCTR_RTS_44DELAY 0x09 360 #define UART_17158_FCTR_RTS_48DELAY 0x10 361 #define UART_17158_FCTR_RTS_52DELAY 0x11 362 363 #define UART_17158_FCTR_RTS_IRDA 0x10 364 #define UART_17158_FCTR_RS485 0x20 365 #define UART_17158_FCTR_TRGA 0x00 366 #define UART_17158_FCTR_TRGB 0x40 367 #define UART_17158_FCTR_TRGC 0x80 368 #define UART_17158_FCTR_TRGD 0xC0 369 370 /* 17158 trigger table selects.. */ 371 #define UART_17158_FCTR_BIT6 0x40 372 #define UART_17158_FCTR_BIT7 0x80 373 374 /* 17158 TX/RX memmapped buffer offsets */ 375 #define UART_17158_RX_FIFOSIZE 64 376 #define UART_17158_TX_FIFOSIZE 64 377 378 /* 17158 Extended IIR's */ 379 #define UART_17158_IIR_RDI_TIMEOUT 0x0C /* Receiver data TIMEOUT */ 380 #define UART_17158_IIR_XONXOFF 0x10 /* Received an XON/XOFF char */ 381 #define UART_17158_IIR_HWFLOW_STATE_CHANGE 0x20 /* CTS/DSR or RTS/DTR state change */ 382 #define UART_17158_IIR_FIFO_ENABLED 0xC0 /* 16550 FIFOs are Enabled */ 383 384 /* 385 * These are the extended interrupts that get sent 386 * back to us from the UART's 32bit interrupt register 387 */ 388 #define UART_17158_RX_LINE_STATUS 0x1 /* RX Ready */ 389 #define UART_17158_RXRDY_TIMEOUT 0x2 /* RX Ready Timeout */ 390 #define UART_17158_TXRDY 0x3 /* TX Ready */ 391 #define UART_17158_MSR 0x4 /* Modem State Change */ 392 #define UART_17158_TX_AND_FIFO_CLR 0x40 /* Transmitter Holding Reg Empty */ 393 #define UART_17158_RX_FIFO_DATA_ERROR 0x80 /* UART detected an RX FIFO Data error */ 394 395 /* 396 * These are the EXTENDED definitions for the 17C158's Interrupt 397 * Enable Register. 398 */ 399 #define UART_17158_EFR_ECB 0x10 /* Enhanced control bit */ 400 #define UART_17158_EFR_IXON 0x2 /* Receiver compares Xon1/Xoff1 */ 401 #define UART_17158_EFR_IXOFF 0x8 /* Transmit Xon1/Xoff1 */ 402 #define UART_17158_EFR_RTSDTR 0x40 /* Auto RTS/DTR Flow Control Enable */ 403 #define UART_17158_EFR_CTSDSR 0x80 /* Auto CTS/DSR Flow COntrol Enable */ 404 405 #define UART_17158_XOFF_DETECT 0x1 /* Indicates whether chip saw an incoming XOFF char */ 406 #define UART_17158_XON_DETECT 0x2 /* Indicates whether chip saw an incoming XON char */ 407 408 #define UART_17158_IER_RSVD1 0x10 /* Reserved by Exar */ 409 #define UART_17158_IER_XOFF 0x20 /* Xoff Interrupt Enable */ 410 #define UART_17158_IER_RTSDTR 0x40 /* Output Interrupt Enable */ 411 #define UART_17158_IER_CTSDSR 0x80 /* Input Interrupt Enable */ 412 413 #define PCI_DEVICE_NEO_2DB9_PCI_NAME "Neo 2 - DB9 Universal PCI" 414 #define PCI_DEVICE_NEO_2DB9PRI_PCI_NAME "Neo 2 - DB9 Universal PCI - Powered Ring Indicator" 415 #define PCI_DEVICE_NEO_2RJ45_PCI_NAME "Neo 2 - RJ45 Universal PCI" 416 #define PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME "Neo 2 - RJ45 Universal PCI - Powered Ring Indicator" 417 #define PCIE_DEVICE_NEO_IBM_PCI_NAME "Neo 4 - PCI Express - IBM" 418 419 /* 420 * Our Global Variables. 421 */ 422 extern struct uart_driver jsm_uart_driver; 423 extern struct board_ops jsm_neo_ops; 424 extern struct board_ops jsm_cls_ops; 425 extern int jsm_debug; 426 427 /************************************************************************* 428 * 429 * Prototypes for non-static functions used in more than one module 430 * 431 *************************************************************************/ 432 int jsm_tty_init(struct jsm_board *); 433 int jsm_uart_port_init(struct jsm_board *); 434 int jsm_remove_uart_port(struct jsm_board *); 435 void jsm_input(struct jsm_channel *ch); 436 void jsm_check_queue_flow_control(struct jsm_channel *ch); 437 438 #endif 439