2 * Copyright 2003 Digi International (www.digi.com)
3 * Scott H Kilau <Scott_Kilau at digi dot com>
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)
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.
18 #ifndef __DGNC_DRIVER_H
19 #define __DGNC_DRIVER_H
21 #include <linux/types.h>
22 #include <linux/tty.h>
23 #include <linux/interrupt.h>
25 #include "digi.h" /* Digi specific ioctl header */
29 /* Driver identification and error statements */
30 #define PROCSTR "dgnc" /* /proc entries */
31 #define DEVSTR "/dev/dg/dgnc" /* /dev entries */
32 #define DRVSTR "dgnc" /* Driver name string */
33 #define DG_PART "40002369_F" /* RPM part number */
35 #define TRC_TO_CONSOLE 1
37 /* Number of boards we support at once. */
40 #define MAXTTYNAMELEN 200
42 /* Our 3 magic numbers for our board, channel and unit structs */
43 #define DGNC_BOARD_MAGIC 0x5c6df104
44 #define DGNC_CHANNEL_MAGIC 0x6c6df104
45 #define DGNC_UNIT_MAGIC 0x7c6df104
47 /* Serial port types */
51 #define SERIAL_TYPE_NORMAL 1
53 #define PORT_NUM(dev) ((dev) & 0x7f)
54 #define IS_PRINT(dev) (((dev) & 0xff) >= 0x80)
57 *MAX number of stop characters we will send
58 * when our read queue is getting full
60 #define MAX_STOPS_SENT 5
62 /* 4 extra for alignment play space */
63 #define WRITEBUFLEN ((4096) + 4)
65 #define dgnc_jiffies_from_ms(a) (((a) * HZ) / 1000)
68 * Define a local default termios struct. All ports will be created
69 * with this termios initially. This is the same structure that is defined
70 * as the default in tty_io.c with the same settings overridden as in serial.c
72 * In short, this should match the internal serial ports' defaults.
74 #define DEFAULT_IFLAGS (ICRNL | IXON)
75 #define DEFAULT_OFLAGS (OPOST | ONLCR)
76 #define DEFAULT_CFLAGS (B9600 | CS8 | CREAD | HUPCL | CLOCAL)
77 #define DEFAULT_LFLAGS (ISIG | ICANON | ECHO | ECHOE | ECHOK | \
78 ECHOCTL | ECHOKE | IEXTEN)
80 #ifndef _POSIX_VDISABLE
81 #define _POSIX_VDISABLE '\0'
84 /* All the possible states the driver can be while being loaded. */
87 DRIVER_INITIALIZED = 0,
91 /* All the possible states the board can be while booting up. */
99 /* Structures and closely related defines. */
104 /* Per board operations structure */
107 void (*tasklet)(unsigned long data);
108 irqreturn_t (*intr)(int irq, void *voidbrd);
109 void (*uart_init)(struct channel_t *ch);
110 void (*uart_off)(struct channel_t *ch);
111 int (*drain)(struct tty_struct *tty, uint seconds);
112 void (*param)(struct tty_struct *tty);
113 void (*vpd)(struct dgnc_board *brd);
114 void (*assert_modem_signals)(struct channel_t *ch);
115 void (*flush_uart_write)(struct channel_t *ch);
116 void (*flush_uart_read)(struct channel_t *ch);
117 void (*disable_receiver)(struct channel_t *ch);
118 void (*enable_receiver)(struct channel_t *ch);
119 void (*send_break)(struct channel_t *ch, int);
120 void (*send_start_character)(struct channel_t *ch);
121 void (*send_stop_character)(struct channel_t *ch);
122 void (*copy_data_from_queue_to_uart)(struct channel_t *ch);
123 uint (*get_uart_bytes_left)(struct channel_t *ch);
124 void (*send_immediate_char)(struct channel_t *ch, unsigned char);
127 /* Device flag definitions for bd_flags. */
129 #define BD_IS_PCI_EXPRESS 0x0001 /* Is a PCI Express board */
131 /* Per-board information */
134 int magic; /* Board Magic number. */
135 int boardnum; /* Board number: 0-32 */
137 int type; /* Type of board */
138 char *name; /* Product Name */
139 struct pci_dev *pdev; /* Pointer to the pci_dev struct */
140 unsigned long bd_flags; /* Board flags */
141 u16 vendor; /* PCI vendor ID */
142 u16 device; /* PCI device ID */
143 u16 subvendor; /* PCI subsystem vendor ID */
144 u16 subdevice; /* PCI subsystem device ID */
145 unsigned char rev; /* PCI revision ID */
146 uint pci_bus; /* PCI bus value */
147 uint pci_slot; /* PCI slot value */
148 uint maxports; /* MAX ports this board can handle */
149 unsigned char dvid; /* Board specific device id */
150 unsigned char vpd[128]; /* VPD of board, if found */
151 unsigned char serial_num[20]; /* Serial number of board,
155 spinlock_t bd_lock; /* Used to protect board */
157 spinlock_t bd_intr_lock; /* Used to protect the poller tasklet
158 * and the interrupt routine from each
162 uint state; /* State of card. */
163 wait_queue_head_t state_wait; /* Place to sleep on for state change */
165 struct tasklet_struct helper_tasklet; /* Poll helper tasklet */
167 uint nasync; /* Number of ports on card */
169 uint irq; /* Interrupt request number */
171 ulong membase; /* Start of base memory of the card */
172 ulong membase_end; /* End of base memory of the card */
174 u8 __iomem *re_map_membase; /* Remapped memory of the card */
176 ulong iobase; /* Start of io base of the card */
177 ulong iobase_end; /* End of io base of the card */
179 uint bd_uart_offset; /* Space between each UART */
181 struct channel_t *channels[MAXPORTS]; /* array of pointers
185 struct tty_driver *serial_driver;
186 char serial_name[200];
187 struct tty_driver *print_driver;
188 char print_name[200];
190 u16 dpatype; /* The board "type",
193 u16 dpastatus; /* The board "status",
197 uint bd_dividend; /* Board/UARTs specific dividend */
199 struct board_ops *bd_ops;
201 /* /proc/<board> entries */
202 struct proc_dir_entry *proc_entry_pointer;
203 struct dgnc_proc_entry *dgnc_board_table;
207 /* Unit flag definitions for un_flags. */
208 #define UN_ISOPEN 0x0001 /* Device is open */
209 #define UN_CLOSING 0x0002 /* Line is being closed */
210 #define UN_IMM 0x0004 /* Service immediately */
211 #define UN_BUSY 0x0008 /* Some work this channel */
212 #define UN_BREAKI 0x0010 /* Input break received */
213 #define UN_PWAIT 0x0020 /* Printer waiting for terminal */
214 #define UN_TIME 0x0040 /* Waiting on time */
215 #define UN_EMPTY 0x0080 /* Waiting output queue empty */
216 #define UN_LOW 0x0100 /* Waiting output low water mark*/
217 #define UN_EXCL_OPEN 0x0200 /* Open for exclusive use */
218 #define UN_WOPEN 0x0400 /* Device waiting for open */
219 #define UN_WIOCTL 0x0800 /* Device waiting for open */
220 #define UN_HANGUP 0x8000 /* Carrier lost */
224 /* Structure for terminal or printer unit. */
226 int magic; /* Unit Magic Number. */
227 struct channel_t *un_ch;
230 uint un_open_count; /* Counter of opens to port */
231 struct tty_struct *un_tty; /* Pointer to unit tty structure */
232 uint un_flags; /* Unit flags */
233 wait_queue_head_t un_flags_wait; /* Place to sleep to wait on unit */
234 uint un_dev; /* Minor device number */
235 struct device *un_sysfs;
238 /* Device flag definitions for ch_flags. */
239 #define CH_PRON 0x0001 /* Printer on string */
240 #define CH_STOP 0x0002 /* Output is stopped */
241 #define CH_STOPI 0x0004 /* Input is stopped */
242 #define CH_CD 0x0008 /* Carrier is present */
243 #define CH_FCAR 0x0010 /* Carrier forced on */
244 #define CH_HANGUP 0x0020 /* Hangup received */
246 #define CH_RECEIVER_OFF 0x0040 /* Receiver is off */
247 #define CH_OPENING 0x0080 /* Port in fragile open state */
248 #define CH_CLOSING 0x0100 /* Port in fragile close state */
249 #define CH_FIFO_ENABLED 0x0200 /* Port has FIFOs enabled */
250 #define CH_TX_FIFO_EMPTY 0x0400 /* TX Fifo is completely empty */
251 #define CH_TX_FIFO_LWM 0x0800 /* TX Fifo is below Low Water */
252 #define CH_BREAK_SENDING 0x1000 /* Break is being sent */
253 #define CH_LOOPBACK 0x2000 /* Channel is in lookback mode */
254 #define CH_BAUD0 0x08000 /* Used for checking B0 transitions */
255 #define CH_FORCED_STOP 0x20000 /* Output is forcibly stopped */
256 #define CH_FORCED_STOPI 0x40000 /* Input is forcibly stopped */
258 /* Our Read/Error/Write queue sizes */
259 #define RQUEUEMASK 0x1FFF /* 8 K - 1 */
260 #define EQUEUEMASK 0x1FFF /* 8 K - 1 */
261 #define WQUEUEMASK 0x0FFF /* 4 K - 1 */
262 #define RQUEUESIZE (RQUEUEMASK + 1)
263 #define EQUEUESIZE RQUEUESIZE
264 #define WQUEUESIZE (WQUEUEMASK + 1)
266 /* Channel information structure. */
268 int magic; /* Channel Magic Number */
269 struct dgnc_board *ch_bd; /* Board structure pointer */
270 struct digi_t ch_digi; /* Transparent Print structure */
271 struct un_t ch_tun; /* Terminal unit info */
272 struct un_t ch_pun; /* Printer unit info */
274 spinlock_t ch_lock; /* provide for serialization */
275 wait_queue_head_t ch_flags_wait;
277 uint ch_portnum; /* Port number, 0 offset. */
278 uint ch_open_count; /* open count */
279 uint ch_flags; /* Channel flags */
281 ulong ch_close_delay; /* How long we should
285 ulong ch_cpstime; /* Time for CPS calculations */
287 tcflag_t ch_c_iflag; /* channel iflags */
288 tcflag_t ch_c_cflag; /* channel cflags */
289 tcflag_t ch_c_oflag; /* channel oflags */
290 tcflag_t ch_c_lflag; /* channel lflags */
291 unsigned char ch_stopc; /* Stop character */
292 unsigned char ch_startc; /* Start character */
294 uint ch_old_baud; /* Cache of the current baud */
295 uint ch_custom_speed;/* Custom baud, if set */
297 uint ch_wopen; /* Waiting for open process cnt */
299 unsigned char ch_mostat; /* FEP output modem status */
300 unsigned char ch_mistat; /* FEP input modem status */
302 struct neo_uart_struct __iomem *ch_neo_uart; /* Pointer to the
303 * "mapped" UART struct
305 struct cls_uart_struct __iomem *ch_cls_uart; /* Pointer to the
306 * "mapped" UART struct
309 unsigned char ch_cached_lsr; /* Cached value of the LSR register */
311 unsigned char *ch_rqueue; /* Our read queue buffer - malloc'ed */
312 ushort ch_r_head; /* Head location of the read queue */
313 ushort ch_r_tail; /* Tail location of the read queue */
315 unsigned char *ch_equeue; /* Our error queue buffer - malloc'ed */
316 ushort ch_e_head; /* Head location of the error queue */
317 ushort ch_e_tail; /* Tail location of the error queue */
319 unsigned char *ch_wqueue; /* Our write queue buffer - malloc'ed */
320 ushort ch_w_head; /* Head location of the write queue */
321 ushort ch_w_tail; /* Tail location of the write queue */
323 ulong ch_rxcount; /* total of data received so far */
324 ulong ch_txcount; /* total of data transmitted so far */
326 unsigned char ch_r_tlevel; /* Receive Trigger level */
327 unsigned char ch_t_tlevel; /* Transmit Trigger level */
329 unsigned char ch_r_watermark; /* Receive Watermark */
331 ulong ch_stop_sending_break; /* Time we should STOP
335 uint ch_stops_sent; /* How many times I have sent a stop
336 * character to try to stop the other
339 ulong ch_err_parity; /* Count of parity errors on channel */
340 ulong ch_err_frame; /* Count of framing errors on channel */
341 ulong ch_err_break; /* Count of breaks on channel */
342 ulong ch_err_overrun; /* Count of overruns on channel */
344 ulong ch_xon_sends; /* Count of xons transmitted */
345 ulong ch_xoff_sends; /* Count of xoffs transmitted */
347 /* /proc/<board>/<channel> entries */
348 struct proc_dir_entry *proc_entry_pointer;
349 struct dgnc_proc_entry *dgnc_channel_table;
353 /* Our Global Variables. */
355 extern uint dgnc_major; /* Our driver/mgmt major */
356 extern int dgnc_poll_tick; /* Poll interval - 20 ms */
357 extern spinlock_t dgnc_global_lock; /* Driver global spinlock */
358 extern spinlock_t dgnc_poll_lock; /* Poll scheduling lock */
359 extern uint dgnc_num_boards; /* Total number of boards */
360 extern struct dgnc_board *dgnc_board[MAXBOARDS];/* Array of board