drivers/staging/dgnc/dgnc_driver.h

   1 /*
   2  * Copyright 2003 Digi International (www.digi.com)
   3  *      Scott H Kilau <Scott_Kilau at digi dot com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
  12  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  13  * PURPOSE.  See the GNU General Public License for more details.
  14  *
  15  *************************************************************************
  16  *
  17  * Driver includes
  18  *
  19  *************************************************************************/
  20
  21 #ifndef __DGNC_DRIVER_H
  22 #define __DGNC_DRIVER_H
  23
  24 #include <linux/types.h>
  25 #include <linux/tty.h>
  26 #include <linux/interrupt.h>
  27
  28 #include "digi.h"               /* Digi specific ioctl header */
  29 #include "dgnc_sysfs.h"         /* Support for SYSFS */
  30
  31 /*************************************************************************
  32  *
  33  * Driver defines
  34  *
  35  *************************************************************************/
  36
  37 /* Driver identification and error statments */
  38 #define PROCSTR         "dgnc"                  /* /proc entries         */
  39 #define DEVSTR          "/dev/dg/dgnc"          /* /dev entries          */
  40 #define DRVSTR          "dgnc"                  /* Driver name string    */
  41 #define DG_PART         "40002369_F"            /* RPM part number       */
  42
  43 #define TRC_TO_CONSOLE 1
  44
  45 /* Number of boards we support at once. */
  46 #define MAXBOARDS       20
  47 #define MAXPORTS        8
  48 #define MAXTTYNAMELEN   200
  49
  50 /* Our 3 magic numbers for our board, channel and unit structs */
  51 #define DGNC_BOARD_MAGIC        0x5c6df104
  52 #define DGNC_CHANNEL_MAGIC      0x6c6df104
  53 #define DGNC_UNIT_MAGIC         0x7c6df104
  54
  55 /* Serial port types */
  56 #define DGNC_SERIAL             0
  57 #define DGNC_PRINT              1
  58
  59 #define SERIAL_TYPE_NORMAL      1
  60
  61 #define PORT_NUM(dev)   ((dev) & 0x7f)
  62 #define IS_PRINT(dev)   (((dev) & 0xff) >= 0x80)
  63
  64 /* MAX number of stop characters we will send
  65  * when our read queue is getting full
  66  */
  67 #define MAX_STOPS_SENT 5
  68
  69 /* 4 extra for alignment play space */
  70 #define WRITEBUFLEN             ((4096) + 4)
  71
  72 #define dgnc_jiffies_from_ms(a) (((a) * HZ) / 1000)
  73
  74 /*
  75  * Define a local default termios struct. All ports will be created
  76  * with this termios initially.  This is the same structure that is defined
  77  * as the default in tty_io.c with the same settings overridden as in serial.c
  78  *
  79  * In short, this should match the internal serial ports' defaults.
  80  */
  81 #define DEFAULT_IFLAGS  (ICRNL | IXON)
  82 #define DEFAULT_OFLAGS  (OPOST | ONLCR)
  83 #define DEFAULT_CFLAGS  (B9600 | CS8 | CREAD | HUPCL | CLOCAL)
  84 #define DEFAULT_LFLAGS  (ISIG | ICANON | ECHO | ECHOE | ECHOK | \
  85                         ECHOCTL | ECHOKE | IEXTEN)
  86
  87 #ifndef _POSIX_VDISABLE
  88 #define   _POSIX_VDISABLE '\0'
  89 #endif
  90
  91 /*
  92  * All the possible states the driver can be while being loaded.
  93  */
  94 enum {
  95         DRIVER_INITIALIZED = 0,
  96         DRIVER_READY
  97 };
  98
  99 /*
 100  * All the possible states the board can be while booting up.
 101  */
 102 enum {
 103         BOARD_FAILED = 0,
 104         BOARD_FOUND,
 105         BOARD_READY
 106 };
 107
 108 /*************************************************************************
 109  *
 110  * Structures and closely related defines.
 111  *
 112  *************************************************************************/
 113
 114 struct dgnc_board;
 115 struct channel_t;
 116
 117 /************************************************************************
 118  * Per board operations structure                                      *
 119  ************************************************************************/
 120 struct board_ops {
 121         void (*tasklet)(unsigned long data);
 122         irqreturn_t (*intr)(int irq, void *voidbrd);
 123         void (*uart_init)(struct channel_t *ch);
 124         void (*uart_off)(struct channel_t *ch);
 125         int  (*drain)(struct tty_struct *tty, uint seconds);
 126         void (*param)(struct tty_struct *tty);
 127         void (*vpd)(struct dgnc_board *brd);
 128         void (*assert_modem_signals)(struct channel_t *ch);
 129         void (*flush_uart_write)(struct channel_t *ch);
 130         void (*flush_uart_read)(struct channel_t *ch);
 131         void (*disable_receiver)(struct channel_t *ch);
 132         void (*enable_receiver)(struct channel_t *ch);
 133         void (*send_break)(struct channel_t *ch, int);
 134         void (*send_start_character)(struct channel_t *ch);
 135         void (*send_stop_character)(struct channel_t *ch);
 136         void (*copy_data_from_queue_to_uart)(struct channel_t *ch);
 137         uint (*get_uart_bytes_left)(struct channel_t *ch);
 138         void (*send_immediate_char)(struct channel_t *ch, unsigned char);
 139 };
 140
 141 /************************************************************************
 142  * Device flag definitions for bd_flags.
 143  ************************************************************************/
 144 #define BD_IS_PCI_EXPRESS     0x0001      /* Is a PCI Express board */
 145
 146 /*
 147  *      Per-board information
 148  */
 149 struct dgnc_board {
 150         int             magic;          /* Board Magic number.  */
 151         int             boardnum;       /* Board number: 0-32 */
 152
 153         int             type;           /* Type of board */
 154         char            *name;          /* Product Name */
 155         struct pci_dev  *pdev;          /* Pointer to the pci_dev struct */
 156         unsigned long   bd_flags;       /* Board flags */
 157         u16             vendor;         /* PCI vendor ID */
 158         u16             device;         /* PCI device ID */
 159         u16             subvendor;      /* PCI subsystem vendor ID */
 160         u16             subdevice;      /* PCI subsystem device ID */
 161         unsigned char   rev;            /* PCI revision ID */
 162         uint            pci_bus;        /* PCI bus value */
 163         uint            pci_slot;       /* PCI slot value */
 164         uint            maxports;       /* MAX ports this board can handle */
 165         unsigned char   dvid;           /* Board specific device id */
 166         unsigned char   vpd[128];       /* VPD of board, if found */
 167         unsigned char   serial_num[20]; /* Serial number of board,
 168                                          * if found in VPD
 169                                          */
 170
 171         spinlock_t      bd_lock;        /* Used to protect board */
 172
 173         spinlock_t      bd_intr_lock;   /* Used to protect the poller tasklet
 174                                          * and the interrupt routine from each
 175                                          * other.
 176                                          */
 177
 178         uint            state;          /* State of card. */
 179         wait_queue_head_t state_wait;   /* Place to sleep on for state change */
 180
 181         struct          tasklet_struct helper_tasklet; /* Poll helper tasklet */
 182
 183         uint            nasync;         /* Number of ports on card */
 184
 185         uint            irq;            /* Interrupt request number */
 186         ulong           intr_count;     /* Count of interrupts */
 187         ulong           intr_modem;     /* Count of interrupts */
 188         ulong           intr_tx;        /* Count of interrupts */
 189         ulong           intr_rx;        /* Count of interrupts */
 190
 191         ulong           membase;        /* Start of base memory of the card */
 192         ulong           membase_end;    /* End of base memory of the card */
 193
 194         u8 __iomem      *re_map_membase; /* Remapped memory of the card */
 195
 196         ulong           iobase;         /* Start of io base of the card */
 197         ulong           iobase_end;     /* End of io base of the card */
 198
 199         uint            bd_uart_offset; /* Space between each UART */
 200
 201         struct channel_t *channels[MAXPORTS];   /* array of pointers
 202                                                  * to our channels.
 203                                                  */
 204
 205         struct tty_driver serial_driver;
 206         char            serial_name[200];
 207         struct tty_driver print_driver;
 208         char            print_name[200];
 209
 210         bool            dgnc_major_serial_registered;
 211         bool            dgnc_major_transparent_print_registered;
 212
 213         uint            dgnc_serial_major;
 214         uint            dgnc_transparent_print_major;
 215
 216         u16             dpatype;        /* The board "type",
 217                                          * as defined by DPA
 218                                          */
 219         u16             dpastatus;      /* The board "status",
 220                                          * as defined by DPA
 221                                          */
 222
 223         /*
 224          *      Mgmt data.
 225          */
 226         char            *msgbuf_head;
 227         char            *msgbuf;
 228
 229         uint            bd_dividend;    /* Board/UARTs specific dividend */
 230
 231         struct board_ops *bd_ops;
 232
 233         /* /proc/<board> entries */
 234         struct proc_dir_entry *proc_entry_pointer;
 235         struct dgnc_proc_entry *dgnc_board_table;
 236
 237 };
 238
 239 /************************************************************************
 240  * Unit flag definitions for un_flags.
 241  ************************************************************************/
 242 #define UN_ISOPEN       0x0001          /* Device is open               */
 243 #define UN_CLOSING      0x0002          /* Line is being closed         */
 244 #define UN_IMM          0x0004          /* Service immediately          */
 245 #define UN_BUSY         0x0008          /* Some work this channel       */
 246 #define UN_BREAKI       0x0010          /* Input break received         */
 247 #define UN_PWAIT        0x0020          /* Printer waiting for terminal */
 248 #define UN_TIME         0x0040          /* Waiting on time              */
 249 #define UN_EMPTY        0x0080          /* Waiting output queue empty   */
 250 #define UN_LOW          0x0100          /* Waiting output low water mark*/
 251 #define UN_EXCL_OPEN    0x0200          /* Open for exclusive use       */
 252 #define UN_WOPEN        0x0400          /* Device waiting for open      */
 253 #define UN_WIOCTL       0x0800          /* Device waiting for open      */
 254 #define UN_HANGUP       0x8000          /* Carrier lost                 */
 255
 256 struct device;
 257
 258 /************************************************************************
 259  * Structure for terminal or printer unit.
 260  ************************************************************************/
 261 struct un_t {
 262         int     magic;          /* Unit Magic Number.                   */
 263         struct  channel_t *un_ch;
 264         ulong   un_time;
 265         uint    un_type;
 266         uint    un_open_count;  /* Counter of opens to port             */
 267         struct tty_struct *un_tty;/* Pointer to unit tty structure      */
 268         uint    un_flags;       /* Unit flags                           */
 269         wait_queue_head_t un_flags_wait; /* Place to sleep to wait on unit */
 270         uint    un_dev;         /* Minor device number                  */
 271         struct device *un_sysfs;
 272 };
 273
 274 /************************************************************************
 275  * Device flag definitions for ch_flags.
 276  ************************************************************************/
 277 #define CH_PRON         0x0001          /* Printer on string            */
 278 #define CH_STOP         0x0002          /* Output is stopped            */
 279 #define CH_STOPI        0x0004          /* Input is stopped             */
 280 #define CH_CD           0x0008          /* Carrier is present           */
 281 #define CH_FCAR         0x0010          /* Carrier forced on            */
 282 #define CH_HANGUP       0x0020          /* Hangup received              */
 283
 284 #define CH_RECEIVER_OFF 0x0040          /* Receiver is off              */
 285 #define CH_OPENING      0x0080          /* Port in fragile open state   */
 286 #define CH_CLOSING      0x0100          /* Port in fragile close state  */
 287 #define CH_FIFO_ENABLED 0x0200          /* Port has FIFOs enabled       */
 288 #define CH_TX_FIFO_EMPTY 0x0400         /* TX Fifo is completely empty  */
 289 #define CH_TX_FIFO_LWM  0x0800          /* TX Fifo is below Low Water   */
 290 #define CH_BREAK_SENDING 0x1000         /* Break is being sent          */
 291 #define CH_LOOPBACK 0x2000              /* Channel is in lookback mode  */
 292 #define CH_BAUD0        0x08000         /* Used for checking B0 transitions */
 293 #define CH_FORCED_STOP  0x20000         /* Output is forcibly stopped   */
 294 #define CH_FORCED_STOPI 0x40000         /* Input is forcibly stopped    */
 295
 296 /* Our Read/Error/Write queue sizes */
 297 #define RQUEUEMASK      0x1FFF          /* 8 K - 1 */
 298 #define EQUEUEMASK      0x1FFF          /* 8 K - 1 */
 299 #define WQUEUEMASK      0x0FFF          /* 4 K - 1 */
 300 #define RQUEUESIZE      (RQUEUEMASK + 1)
 301 #define EQUEUESIZE      RQUEUESIZE
 302 #define WQUEUESIZE      (WQUEUEMASK + 1)
 303
 304 /************************************************************************
 305  * Channel information structure.
 306  ************************************************************************/
 307 struct channel_t {
 308         int magic;                      /* Channel Magic Number         */
 309         struct dgnc_board       *ch_bd;         /* Board structure pointer */
 310         struct digi_t   ch_digi;        /* Transparent Print structure  */
 311         struct un_t     ch_tun;         /* Terminal unit info      */
 312         struct un_t     ch_pun;         /* Printer unit info        */
 313
 314         spinlock_t      ch_lock;        /* provide for serialization */
 315         wait_queue_head_t ch_flags_wait;
 316
 317         uint            ch_portnum;     /* Port number, 0 offset.       */
 318         uint            ch_open_count;  /* open count                   */
 319         uint            ch_flags;       /* Channel flags                */
 320
 321         ulong           ch_close_delay; /* How long we should
 322                                          * drop RTS/DTR for
 323                                          */
 324
 325         ulong           ch_cpstime;     /* Time for CPS calculations    */
 326
 327         tcflag_t        ch_c_iflag;     /* channel iflags              */
 328         tcflag_t        ch_c_cflag;     /* channel cflags              */
 329         tcflag_t        ch_c_oflag;     /* channel oflags              */
 330         tcflag_t        ch_c_lflag;     /* channel lflags              */
 331         unsigned char   ch_stopc;       /* Stop character              */
 332         unsigned char   ch_startc;      /* Start character            */
 333
 334         uint            ch_old_baud;    /* Cache of the current baud */
 335         uint            ch_custom_speed;/* Custom baud, if set */
 336
 337         uint            ch_wopen;       /* Waiting for open process cnt */
 338
 339         unsigned char           ch_mostat;      /* FEP output modem status */
 340         unsigned char           ch_mistat;      /* FEP input modem status */
 341
 342         struct neo_uart_struct __iomem *ch_neo_uart;    /* Pointer to the
 343                                                          * "mapped" UART struct
 344                                                          */
 345         struct cls_uart_struct __iomem *ch_cls_uart;    /* Pointer to the
 346                                                          * "mapped" UART struct
 347                                                          */
 348
 349         unsigned char   ch_cached_lsr;  /* Cached value of the LSR register */
 350
 351         unsigned char   *ch_rqueue;     /* Our read queue buffer - malloc'ed */
 352         ushort          ch_r_head;      /* Head location of the read queue */
 353         ushort          ch_r_tail;      /* Tail location of the read queue */
 354
 355         unsigned char   *ch_equeue;     /* Our error queue buffer - malloc'ed */
 356         ushort          ch_e_head;      /* Head location of the error queue */
 357         ushort          ch_e_tail;      /* Tail location of the error queue */
 358
 359         unsigned char   *ch_wqueue;     /* Our write queue buffer - malloc'ed */
 360         ushort          ch_w_head;      /* Head location of the write queue */
 361         ushort          ch_w_tail;      /* Tail location of the write queue */
 362
 363         ulong           ch_rxcount;     /* total of data received so far */
 364         ulong           ch_txcount;     /* total of data transmitted so far */
 365
 366         unsigned char           ch_r_tlevel;    /* Receive Trigger level */
 367         unsigned char           ch_t_tlevel;    /* Transmit Trigger level */
 368
 369         unsigned char           ch_r_watermark; /* Receive Watermark */
 370
 371         ulong           ch_stop_sending_break;  /* Time we should STOP
 372                                                  * sending a break
 373                                                  */
 374
 375         uint            ch_stops_sent;  /* How many times I have sent a stop
 376                                          * character to try to stop the other
 377                                          * guy sending.
 378                                          */
 379         ulong           ch_err_parity;  /* Count of parity errors on channel */
 380         ulong           ch_err_frame;   /* Count of framing errors on channel */
 381         ulong           ch_err_break;   /* Count of breaks on channel */
 382         ulong           ch_err_overrun; /* Count of overruns on channel */
 383
 384         ulong           ch_xon_sends;   /* Count of xons transmitted */
 385         ulong           ch_xoff_sends;  /* Count of xoffs transmitted */
 386
 387         ulong           ch_intr_modem;  /* Count of interrupts */
 388         ulong           ch_intr_tx;     /* Count of interrupts */
 389         ulong           ch_intr_rx;     /* Count of interrupts */
 390
 391         /* /proc/<board>/<channel> entries */
 392         struct proc_dir_entry *proc_entry_pointer;
 393         struct dgnc_proc_entry *dgnc_channel_table;
 394
 395 };
 396
 397 /*
 398  * Our Global Variables.
 399  */
 400 extern uint             dgnc_major;             /* Our driver/mgmt major */
 401 extern int              dgnc_poll_tick;         /* Poll interval - 20 ms */
 402 extern spinlock_t       dgnc_global_lock;       /* Driver global spinlock */
 403 extern spinlock_t       dgnc_poll_lock;         /* Poll scheduling lock */
 404 extern uint             dgnc_num_boards;                /* Total number of boards */
 405 extern struct dgnc_board        *dgnc_board[MAXBOARDS]; /* Array of board
 406                                                          * structs
 407                                                          */
 408
 409 #endif