/* * Copyright 2003 Digi International (www.digi.com) * Scott H Kilau * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR * PURPOSE. See the GNU General Public License for more details. * ************************************************************************* * * Driver includes * *************************************************************************/ #ifndef __DGNC_DRIVER_H #define __DGNC_DRIVER_H #include #include #include #include "digi.h" /* Digi specific ioctl header */ #include "dgnc_sysfs.h" /* Support for SYSFS */ /************************************************************************* * * Driver defines * *************************************************************************/ /* Driver identification and error statments */ #define PROCSTR "dgnc" /* /proc entries */ #define DEVSTR "/dev/dg/dgnc" /* /dev entries */ #define DRVSTR "dgnc" /* Driver name string */ #define DG_PART "40002369_F" /* RPM part number */ #define TRC_TO_CONSOLE 1 /* Number of boards we support at once. */ #define MAXBOARDS 20 #define MAXPORTS 8 #define MAXTTYNAMELEN 200 /* Our 3 magic numbers for our board, channel and unit structs */ #define DGNC_BOARD_MAGIC 0x5c6df104 #define DGNC_CHANNEL_MAGIC 0x6c6df104 #define DGNC_UNIT_MAGIC 0x7c6df104 /* Serial port types */ #define DGNC_SERIAL 0 #define DGNC_PRINT 1 #define SERIAL_TYPE_NORMAL 1 #define PORT_NUM(dev) ((dev) & 0x7f) #define IS_PRINT(dev) (((dev) & 0xff) >= 0x80) /* MAX number of stop characters we will send * when our read queue is getting full */ #define MAX_STOPS_SENT 5 /* 4 extra for alignment play space */ #define WRITEBUFLEN ((4096) + 4) #define dgnc_jiffies_from_ms(a) (((a) * HZ) / 1000) /* * Define a local default termios struct. All ports will be created * with this termios initially. This is the same structure that is defined * as the default in tty_io.c with the same settings overridden as in serial.c * * In short, this should match the internal serial ports' defaults. */ #define DEFAULT_IFLAGS (ICRNL | IXON) #define DEFAULT_OFLAGS (OPOST | ONLCR) #define DEFAULT_CFLAGS (B9600 | CS8 | CREAD | HUPCL | CLOCAL) #define DEFAULT_LFLAGS (ISIG | ICANON | ECHO | ECHOE | ECHOK | \ ECHOCTL | ECHOKE | IEXTEN) #ifndef _POSIX_VDISABLE #define _POSIX_VDISABLE '\0' #endif /* * All the possible states the driver can be while being loaded. */ enum { DRIVER_INITIALIZED = 0, DRIVER_READY }; /* * All the possible states the board can be while booting up. */ enum { BOARD_FAILED = 0, BOARD_FOUND, BOARD_READY }; /************************************************************************* * * Structures and closely related defines. * *************************************************************************/ struct dgnc_board; struct channel_t; /************************************************************************ * Per board operations structure * ************************************************************************/ struct board_ops { void (*tasklet)(unsigned long data); irqreturn_t (*intr)(int irq, void *voidbrd); void (*uart_init)(struct channel_t *ch); void (*uart_off)(struct channel_t *ch); int (*drain)(struct tty_struct *tty, uint seconds); void (*param)(struct tty_struct *tty); void (*vpd)(struct dgnc_board *brd); void (*assert_modem_signals)(struct channel_t *ch); void (*flush_uart_write)(struct channel_t *ch); void (*flush_uart_read)(struct channel_t *ch); void (*disable_receiver)(struct channel_t *ch); void (*enable_receiver)(struct channel_t *ch); void (*send_break)(struct channel_t *ch, int); void (*send_start_character)(struct channel_t *ch); void (*send_stop_character)(struct channel_t *ch); void (*copy_data_from_queue_to_uart)(struct channel_t *ch); uint (*get_uart_bytes_left)(struct channel_t *ch); void (*send_immediate_char)(struct channel_t *ch, unsigned char); }; /************************************************************************ * Device flag definitions for bd_flags. ************************************************************************/ #define BD_IS_PCI_EXPRESS 0x0001 /* Is a PCI Express board */ /* * Per-board information */ struct dgnc_board { int magic; /* Board Magic number. */ int boardnum; /* Board number: 0-32 */ int type; /* Type of board */ char *name; /* Product Name */ struct pci_dev *pdev; /* Pointer to the pci_dev struct */ unsigned long bd_flags; /* Board flags */ u16 vendor; /* PCI vendor ID */ u16 device; /* PCI device ID */ u16 subvendor; /* PCI subsystem vendor ID */ u16 subdevice; /* PCI subsystem device ID */ unsigned char rev; /* PCI revision ID */ uint pci_bus; /* PCI bus value */ uint pci_slot; /* PCI slot value */ uint maxports; /* MAX ports this board can handle */ unsigned char dvid; /* Board specific device id */ unsigned char vpd[128]; /* VPD of board, if found */ unsigned char serial_num[20]; /* Serial number of board, * if found in VPD */ spinlock_t bd_lock; /* Used to protect board */ spinlock_t bd_intr_lock; /* Used to protect the poller tasklet * and the interrupt routine from each * other. */ uint state; /* State of card. */ wait_queue_head_t state_wait; /* Place to sleep on for state change */ struct tasklet_struct helper_tasklet; /* Poll helper tasklet */ uint nasync; /* Number of ports on card */ uint irq; /* Interrupt request number */ ulong intr_count; /* Count of interrupts */ ulong intr_modem; /* Count of interrupts */ ulong intr_tx; /* Count of interrupts */ ulong intr_rx; /* Count of interrupts */ ulong membase; /* Start of base memory of the card */ ulong membase_end; /* End of base memory of the card */ u8 __iomem *re_map_membase; /* Remapped memory of the card */ ulong iobase; /* Start of io base of the card */ ulong iobase_end; /* End of io base of the card */ uint bd_uart_offset; /* Space between each UART */ struct channel_t *channels[MAXPORTS]; /* array of pointers * to our channels. */ struct tty_driver *serial_driver; char serial_name[200]; struct tty_driver *print_driver; char print_name[200]; bool dgnc_major_serial_registered; bool dgnc_major_transparent_print_registered; u16 dpatype; /* The board "type", * as defined by DPA */ u16 dpastatus; /* The board "status", * as defined by DPA */ /* * Mgmt data. */ char *msgbuf_head; char *msgbuf; uint bd_dividend; /* Board/UARTs specific dividend */ struct board_ops *bd_ops; /* /proc/ entries */ struct proc_dir_entry *proc_entry_pointer; struct dgnc_proc_entry *dgnc_board_table; }; /************************************************************************ * Unit flag definitions for un_flags. ************************************************************************/ #define UN_ISOPEN 0x0001 /* Device is open */ #define UN_CLOSING 0x0002 /* Line is being closed */ #define UN_IMM 0x0004 /* Service immediately */ #define UN_BUSY 0x0008 /* Some work this channel */ #define UN_BREAKI 0x0010 /* Input break received */ #define UN_PWAIT 0x0020 /* Printer waiting for terminal */ #define UN_TIME 0x0040 /* Waiting on time */ #define UN_EMPTY 0x0080 /* Waiting output queue empty */ #define UN_LOW 0x0100 /* Waiting output low water mark*/ #define UN_EXCL_OPEN 0x0200 /* Open for exclusive use */ #define UN_WOPEN 0x0400 /* Device waiting for open */ #define UN_WIOCTL 0x0800 /* Device waiting for open */ #define UN_HANGUP 0x8000 /* Carrier lost */ struct device; /************************************************************************ * Structure for terminal or printer unit. ************************************************************************/ struct un_t { int magic; /* Unit Magic Number. */ struct channel_t *un_ch; ulong un_time; uint un_type; uint un_open_count; /* Counter of opens to port */ struct tty_struct *un_tty;/* Pointer to unit tty structure */ uint un_flags; /* Unit flags */ wait_queue_head_t un_flags_wait; /* Place to sleep to wait on unit */ uint un_dev; /* Minor device number */ struct device *un_sysfs; }; /************************************************************************ * Device flag definitions for ch_flags. ************************************************************************/ #define CH_PRON 0x0001 /* Printer on string */ #define CH_STOP 0x0002 /* Output is stopped */ #define CH_STOPI 0x0004 /* Input is stopped */ #define CH_CD 0x0008 /* Carrier is present */ #define CH_FCAR 0x0010 /* Carrier forced on */ #define CH_HANGUP 0x0020 /* Hangup received */ #define CH_RECEIVER_OFF 0x0040 /* Receiver is off */ #define CH_OPENING 0x0080 /* Port in fragile open state */ #define CH_CLOSING 0x0100 /* Port in fragile close state */ #define CH_FIFO_ENABLED 0x0200 /* Port has FIFOs enabled */ #define CH_TX_FIFO_EMPTY 0x0400 /* TX Fifo is completely empty */ #define CH_TX_FIFO_LWM 0x0800 /* TX Fifo is below Low Water */ #define CH_BREAK_SENDING 0x1000 /* Break is being sent */ #define CH_LOOPBACK 0x2000 /* Channel is in lookback mode */ #define CH_BAUD0 0x08000 /* Used for checking B0 transitions */ #define CH_FORCED_STOP 0x20000 /* Output is forcibly stopped */ #define CH_FORCED_STOPI 0x40000 /* Input is forcibly stopped */ /* Our Read/Error/Write queue sizes */ #define RQUEUEMASK 0x1FFF /* 8 K - 1 */ #define EQUEUEMASK 0x1FFF /* 8 K - 1 */ #define WQUEUEMASK 0x0FFF /* 4 K - 1 */ #define RQUEUESIZE (RQUEUEMASK + 1) #define EQUEUESIZE RQUEUESIZE #define WQUEUESIZE (WQUEUEMASK + 1) /************************************************************************ * Channel information structure. ************************************************************************/ struct channel_t { int magic; /* Channel Magic Number */ struct dgnc_board *ch_bd; /* Board structure pointer */ struct digi_t ch_digi; /* Transparent Print structure */ struct un_t ch_tun; /* Terminal unit info */ struct un_t ch_pun; /* Printer unit info */ spinlock_t ch_lock; /* provide for serialization */ wait_queue_head_t ch_flags_wait; uint ch_portnum; /* Port number, 0 offset. */ uint ch_open_count; /* open count */ uint ch_flags; /* Channel flags */ ulong ch_close_delay; /* How long we should * drop RTS/DTR for */ ulong ch_cpstime; /* Time for CPS calculations */ tcflag_t ch_c_iflag; /* channel iflags */ tcflag_t ch_c_cflag; /* channel cflags */ tcflag_t ch_c_oflag; /* channel oflags */ tcflag_t ch_c_lflag; /* channel lflags */ unsigned char ch_stopc; /* Stop character */ unsigned char ch_startc; /* Start character */ uint ch_old_baud; /* Cache of the current baud */ uint ch_custom_speed;/* Custom baud, if set */ uint ch_wopen; /* Waiting for open process cnt */ unsigned char ch_mostat; /* FEP output modem status */ unsigned char ch_mistat; /* FEP input modem status */ struct neo_uart_struct __iomem *ch_neo_uart; /* Pointer to the * "mapped" UART struct */ struct cls_uart_struct __iomem *ch_cls_uart; /* Pointer to the * "mapped" UART struct */ unsigned char ch_cached_lsr; /* Cached value of the LSR register */ unsigned char *ch_rqueue; /* Our read queue buffer - malloc'ed */ ushort ch_r_head; /* Head location of the read queue */ ushort ch_r_tail; /* Tail location of the read queue */ unsigned char *ch_equeue; /* Our error queue buffer - malloc'ed */ ushort ch_e_head; /* Head location of the error queue */ ushort ch_e_tail; /* Tail location of the error queue */ unsigned char *ch_wqueue; /* Our write queue buffer - malloc'ed */ ushort ch_w_head; /* Head location of the write queue */ ushort ch_w_tail; /* Tail location of the write queue */ ulong ch_rxcount; /* total of data received so far */ ulong ch_txcount; /* total of data transmitted so far */ unsigned char ch_r_tlevel; /* Receive Trigger level */ unsigned char ch_t_tlevel; /* Transmit Trigger level */ unsigned char ch_r_watermark; /* Receive Watermark */ ulong ch_stop_sending_break; /* Time we should STOP * sending a break */ uint ch_stops_sent; /* How many times I have sent a stop * character to try to stop the other * guy sending. */ ulong ch_err_parity; /* Count of parity errors on channel */ ulong ch_err_frame; /* Count of framing errors on channel */ ulong ch_err_break; /* Count of breaks on channel */ ulong ch_err_overrun; /* Count of overruns on channel */ ulong ch_xon_sends; /* Count of xons transmitted */ ulong ch_xoff_sends; /* Count of xoffs transmitted */ ulong ch_intr_modem; /* Count of interrupts */ ulong ch_intr_tx; /* Count of interrupts */ ulong ch_intr_rx; /* Count of interrupts */ /* /proc// entries */ struct proc_dir_entry *proc_entry_pointer; struct dgnc_proc_entry *dgnc_channel_table; }; /* * Our Global Variables. */ extern uint dgnc_major; /* Our driver/mgmt major */ extern int dgnc_poll_tick; /* Poll interval - 20 ms */ extern spinlock_t dgnc_global_lock; /* Driver global spinlock */ extern spinlock_t dgnc_poll_lock; /* Poll scheduling lock */ extern uint dgnc_num_boards; /* Total number of boards */ extern struct dgnc_board *dgnc_board[MAXBOARDS]; /* Array of board * structs */ #endif