projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * usr/include/linux/lp.h c.1991-1992 James Wiegand | |
| 3 | * many modifications copyright (C) 1992 Michael K. Johnson | |
| 4 | * Interrupt support added 1993 Nigel Gamble | |
| 5 | * Removed 8255 status defines from inside __KERNEL__ Marcelo Tosatti | |
| 6 | */ | |
| 607ca46e DH |
7 | #ifndef _LINUX_LP_H |
| 8 | #define _LINUX_LP_H | |
| 1da177e4 | 9 | |
| 1da177e4 LT |
10 | |
| 11 | #include <linux/wait.h> | |
| 0a5dcb51 | 12 | #include <linux/mutex.h> |
| 607ca46e | 13 | #include <uapi/linux/lp.h> |
| 1da177e4 LT |
14 | |
| 15 | /* Magic numbers for defining port-device mappings */ | |
| 16 | #define LP_PARPORT_UNSPEC -4 | |
| 17 | #define LP_PARPORT_AUTO -3 | |
| 18 | #define LP_PARPORT_OFF -2 | |
| 19 | #define LP_PARPORT_NONE -1 | |
| 20 | ||
| 21 | #define LP_F(minor) lp_table[(minor)].flags /* flags for busy, etc. */ | |
| 22 | #define LP_CHAR(minor) lp_table[(minor)].chars /* busy timeout */ | |
| 23 | #define LP_TIME(minor) lp_table[(minor)].time /* wait time */ | |
| 24 | #define LP_WAIT(minor) lp_table[(minor)].wait /* strobe wait */ | |
| 25 | #define LP_IRQ(minor) lp_table[(minor)].dev->port->irq /* interrupt # */ | |
| 26 | /* PARPORT_IRQ_NONE means polled */ | |
| 27 | #ifdef LP_STATS | |
| 28 | #define LP_STAT(minor) lp_table[(minor)].stats /* statistics area */ | |
| 29 | #endif | |
| 30 | #define LP_BUFFER_SIZE PAGE_SIZE | |
| 31 | ||
| 32 | #define LP_BASE(x) lp_table[(x)].dev->port->base | |
| 33 | ||
| 34 | #ifdef LP_STATS | |
| 35 | struct lp_stats { | |
| 36 | unsigned long chars; | |
| 37 | unsigned long sleeps; | |
| 38 | unsigned int maxrun; | |
| 39 | unsigned int maxwait; | |
| 40 | unsigned int meanwait; | |
| 41 | unsigned int mdev; | |
| 42 | }; | |
| 43 | #endif | |
| 44 | ||
| 45 | struct lp_struct { | |
| 46 | struct pardevice *dev; | |
| 47 | unsigned long flags; | |
| 48 | unsigned int chars; | |
| 49 | unsigned int time; | |
| 50 | unsigned int wait; | |
| 51 | char *lp_buffer; | |
| 52 | #ifdef LP_STATS | |
| 53 | unsigned int lastcall; | |
| 54 | unsigned int runchars; | |
| 55 | struct lp_stats stats; | |
| 56 | #endif | |
| 57 | wait_queue_head_t waitq; | |
| 58 | unsigned int last_error; | |
| 0a5dcb51 | 59 | struct mutex port_mutex; |
| 1da177e4 LT |
60 | wait_queue_head_t dataq; |
| 61 | long timeout; | |
| 62 | unsigned int best_mode; | |
| 63 | unsigned int current_mode; | |
| 64 | unsigned long bits; | |
| 65 | }; | |
| 66 | ||
| 67 | /* | |
| 68 | * The following constants describe the various signals of the printer port | |
| 69 | * hardware. Note that the hardware inverts some signals and that some | |
| 70 | * signals are active low. An example is LP_STROBE, which must be programmed | |
| 71 | * with 1 for being active and 0 for being inactive, because the strobe signal | |
| 72 | * gets inverted, but it is also active low. | |
| 73 | */ | |
| 74 | ||
| 75 | ||
| 76 | /* | |
| 77 | * defines for 8255 control port | |
| 78 | * base + 2 | |
| 79 | * accessed with LP_C(minor) | |
| 80 | */ | |
| 81 | #define LP_PINTEN 0x10 /* high to read data in or-ed with data out */ | |
| 82 | #define LP_PSELECP 0x08 /* inverted output, active low */ | |
| 83 | #define LP_PINITP 0x04 /* unchanged output, active low */ | |
| 84 | #define LP_PAUTOLF 0x02 /* inverted output, active low */ | |
| 85 | #define LP_PSTROBE 0x01 /* short high output on raising edge */ | |
| 86 | ||
| 87 | /* | |
| 88 | * the value written to ports to test existence. PC-style ports will | |
| 89 | * return the value written. AT-style ports will return 0. so why not | |
| 90 | * make them the same ? | |
| 91 | */ | |
| 92 | #define LP_DUMMY 0x00 | |
| 93 | ||
| 94 | /* | |
| 95 | * This is the port delay time, in microseconds. | |
| 96 | * It is used only in the lp_init() and lp_reset() routine. | |
| 97 | */ | |
| 98 | #define LP_DELAY 50 | |
| 99 | ||
| 100 | #endif |