1 #ifndef _LINUX_LP_H 2 #define _LINUX_LP_H 3 4 /* 5 * usr/include/linux/lp.h c.1991-1992 James Wiegand 6 * many modifications copyright (C) 1992 Michael K. Johnson 7 * Interrupt support added 1993 Nigel Gamble 8 * Removed 8255 status defines from inside __KERNEL__ Marcelo Tosatti 9 */ 10 11 /* 12 * Per POSIX guidelines, this module reserves the LP and lp prefixes 13 * These are the lp_table[minor].flags flags... 14 */ 15 #define LP_EXIST 0x0001 16 #define LP_SELEC 0x0002 17 #define LP_BUSY 0x0004 18 #define LP_BUSY_BIT_POS 2 19 #define LP_OFFL 0x0008 20 #define LP_NOPA 0x0010 21 #define LP_ERR 0x0020 22 #define LP_ABORT 0x0040 23 #define LP_CAREFUL 0x0080 /* obsoleted -arca */ 24 #define LP_ABORTOPEN 0x0100 25 26 #define LP_TRUST_IRQ_ 0x0200 /* obsolete */ 27 #define LP_NO_REVERSE 0x0400 /* No reverse mode available. */ 28 #define LP_DATA_AVAIL 0x0800 /* Data is available. */ 29 30 /* 31 * bit defines for 8255 status port 32 * base + 1 33 * accessed with LP_S(minor), which gets the byte... 34 */ 35 #define LP_PBUSY 0x80 /* inverted input, active high */ 36 #define LP_PACK 0x40 /* unchanged input, active low */ 37 #define LP_POUTPA 0x20 /* unchanged input, active high */ 38 #define LP_PSELECD 0x10 /* unchanged input, active high */ 39 #define LP_PERRORP 0x08 /* unchanged input, active low */ 40 41 /* timeout for each character. This is relative to bus cycles -- it 42 * is the count in a busy loop. THIS IS THE VALUE TO CHANGE if you 43 * have extremely slow printing, or if the machine seems to slow down 44 * a lot when you print. If you have slow printing, increase this 45 * number and recompile, and if your system gets bogged down, decrease 46 * this number. This can be changed with the tunelp(8) command as well. 47 */ 48 49 #define LP_INIT_CHAR 1000 50 51 /* The parallel port specs apparently say that there needs to be 52 * a .5usec wait before and after the strobe. 53 */ 54 55 #define LP_INIT_WAIT 1 56 57 /* This is the amount of time that the driver waits for the printer to 58 * catch up when the printer's buffer appears to be filled. If you 59 * want to tune this and have a fast printer (i.e. HPIIIP), decrease 60 * this number, and if you have a slow printer, increase this number. 61 * This is in hundredths of a second, the default 2 being .05 second. 62 * Or use the tunelp(8) command, which is especially nice if you want 63 * change back and forth between character and graphics printing, which 64 * are wildly different... 65 */ 66 67 #define LP_INIT_TIME 2 68 69 /* IOCTL numbers */ 70 #define LPCHAR 0x0601 /* corresponds to LP_INIT_CHAR */ 71 #define LPTIME 0x0602 /* corresponds to LP_INIT_TIME */ 72 #define LPABORT 0x0604 /* call with TRUE arg to abort on error, 73 FALSE to retry. Default is retry. */ 74 #define LPSETIRQ 0x0605 /* call with new IRQ number, 75 or 0 for polling (no IRQ) */ 76 #define LPGETIRQ 0x0606 /* get the current IRQ number */ 77 #define LPWAIT 0x0608 /* corresponds to LP_INIT_WAIT */ 78 /* NOTE: LPCAREFUL is obsoleted and it' s always the default right now -arca */ 79 #define LPCAREFUL 0x0609 /* call with TRUE arg to require out-of-paper, off- 80 line, and error indicators good on all writes, 81 FALSE to ignore them. Default is ignore. */ 82 #define LPABORTOPEN 0x060a /* call with TRUE arg to abort open() on error, 83 FALSE to ignore error. Default is ignore. */ 84 #define LPGETSTATUS 0x060b /* return LP_S(minor) */ 85 #define LPRESET 0x060c /* reset printer */ 86 #ifdef LP_STATS 87 #define LPGETSTATS 0x060d /* get statistics (struct lp_stats) */ 88 #endif 89 #define LPGETFLAGS 0x060e /* get status flags */ 90 #define LPSETTIMEOUT 0x060f /* set parport timeout */ 91 92 /* timeout for printk'ing a timeout, in jiffies (100ths of a second). 93 This is also used for re-checking error conditions if LP_ABORT is 94 not set. This is the default behavior. */ 95 96 #define LP_TIMEOUT_INTERRUPT (60 * HZ) 97 #define LP_TIMEOUT_POLLED (10 * HZ) 98 99 100 #endif 101
