| #ifndef _LINUX_LP_H |
| #define _LINUX_LP_H |
| |
| /* |
| * usr/include/linux/lp.h c.1991-1992 James Wiegand |
| * many modifications copyright (C) 1992 Michael K. Johnson |
| * Interrupt support added 1993 Nigel Gamble |
| * Removed 8255 status defines from inside __KERNEL__ Marcelo Tosatti |
| */ |
| |
| /* |
| * Per POSIX guidelines, this module reserves the LP and lp prefixes |
| * These are the lp_table[minor].flags flags... |
| */ |
| #define LP_EXIST 0x0001 |
| #define LP_SELEC 0x0002 |
| #define LP_BUSY 0x0004 |
| #define LP_BUSY_BIT_POS 2 |
| #define LP_OFFL 0x0008 |
| #define LP_NOPA 0x0010 |
| #define LP_ERR 0x0020 |
| #define LP_ABORT 0x0040 |
| #define LP_CAREFUL 0x0080 /* obsoleted -arca */ |
| #define LP_ABORTOPEN 0x0100 |
| |
| #define LP_TRUST_IRQ_ 0x0200 /* obsolete */ |
| #define LP_NO_REVERSE 0x0400 /* No reverse mode available. */ |
| #define LP_DATA_AVAIL 0x0800 /* Data is available. */ |
| |
| /* |
| * bit defines for 8255 status port |
| * base + 1 |
| * accessed with LP_S(minor), which gets the byte... |
| */ |
| #define LP_PBUSY 0x80 /* inverted input, active high */ |
| #define LP_PACK 0x40 /* unchanged input, active low */ |
| #define LP_POUTPA 0x20 /* unchanged input, active high */ |
| #define LP_PSELECD 0x10 /* unchanged input, active high */ |
| #define LP_PERRORP 0x08 /* unchanged input, active low */ |
| |
| /* timeout for each character. This is relative to bus cycles -- it |
| * is the count in a busy loop. THIS IS THE VALUE TO CHANGE if you |
| * have extremely slow printing, or if the machine seems to slow down |
| * a lot when you print. If you have slow printing, increase this |
| * number and recompile, and if your system gets bogged down, decrease |
| * this number. This can be changed with the tunelp(8) command as well. |
| */ |
| |
| #define LP_INIT_CHAR 1000 |
| |
| /* The parallel port specs apparently say that there needs to be |
| * a .5usec wait before and after the strobe. |
| */ |
| |
| #define LP_INIT_WAIT 1 |
| |
| /* This is the amount of time that the driver waits for the printer to |
| * catch up when the printer's buffer appears to be filled. If you |
| * want to tune this and have a fast printer (i.e. HPIIIP), decrease |
| * this number, and if you have a slow printer, increase this number. |
| * This is in hundredths of a second, the default 2 being .05 second. |
| * Or use the tunelp(8) command, which is especially nice if you want |
| * change back and forth between character and graphics printing, which |
| * are wildly different... |
| */ |
| |
| #define LP_INIT_TIME 2 |
| |
| /* IOCTL numbers */ |
| #define LPCHAR 0x0601 /* corresponds to LP_INIT_CHAR */ |
| #define LPTIME 0x0602 /* corresponds to LP_INIT_TIME */ |
| #define LPABORT 0x0604 /* call with TRUE arg to abort on error, |
| FALSE to retry. Default is retry. */ |
| #define LPSETIRQ 0x0605 /* call with new IRQ number, |
| or 0 for polling (no IRQ) */ |
| #define LPGETIRQ 0x0606 /* get the current IRQ number */ |
| #define LPWAIT 0x0608 /* corresponds to LP_INIT_WAIT */ |
| /* NOTE: LPCAREFUL is obsoleted and it' s always the default right now -arca */ |
| #define LPCAREFUL 0x0609 /* call with TRUE arg to require out-of-paper, off- |
| line, and error indicators good on all writes, |
| FALSE to ignore them. Default is ignore. */ |
| #define LPABORTOPEN 0x060a /* call with TRUE arg to abort open() on error, |
| FALSE to ignore error. Default is ignore. */ |
| #define LPGETSTATUS 0x060b /* return LP_S(minor) */ |
| #define LPRESET 0x060c /* reset printer */ |
| #ifdef LP_STATS |
| #define LPGETSTATS 0x060d /* get statistics (struct lp_stats) */ |
| #endif |
| #define LPGETFLAGS 0x060e /* get status flags */ |
| #define LPSETTIMEOUT 0x060f /* set parport timeout */ |
| |
| /* timeout for printk'ing a timeout, in jiffies (100ths of a second). |
| This is also used for re-checking error conditions if LP_ABORT is |
| not set. This is the default behavior. */ |
| |
| #define LP_TIMEOUT_INTERRUPT (60 * HZ) |
| #define LP_TIMEOUT_POLLED (10 * HZ) |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/wait.h> |
| #include <linux/mutex.h> |
| |
| /* Magic numbers for defining port-device mappings */ |
| #define LP_PARPORT_UNSPEC -4 |
| #define LP_PARPORT_AUTO -3 |
| #define LP_PARPORT_OFF -2 |
| #define LP_PARPORT_NONE -1 |
| |
| #define LP_F(minor) lp_table[(minor)].flags /* flags for busy, etc. */ |
| #define LP_CHAR(minor) lp_table[(minor)].chars /* busy timeout */ |
| #define LP_TIME(minor) lp_table[(minor)].time /* wait time */ |
| #define LP_WAIT(minor) lp_table[(minor)].wait /* strobe wait */ |
| #define LP_IRQ(minor) lp_table[(minor)].dev->port->irq /* interrupt # */ |
| /* PARPORT_IRQ_NONE means polled */ |
| #ifdef LP_STATS |
| #define LP_STAT(minor) lp_table[(minor)].stats /* statistics area */ |
| #endif |
| #define LP_BUFFER_SIZE PAGE_SIZE |
| |
| #define LP_BASE(x) lp_table[(x)].dev->port->base |
| |
| #ifdef LP_STATS |
| struct lp_stats { |
| unsigned long chars; |
| unsigned long sleeps; |
| unsigned int maxrun; |
| unsigned int maxwait; |
| unsigned int meanwait; |
| unsigned int mdev; |
| }; |
| #endif |
| |
| struct lp_struct { |
| struct pardevice *dev; |
| unsigned long flags; |
| unsigned int chars; |
| unsigned int time; |
| unsigned int wait; |
| char *lp_buffer; |
| #ifdef LP_STATS |
| unsigned int lastcall; |
| unsigned int runchars; |
| struct lp_stats stats; |
| #endif |
| wait_queue_head_t waitq; |
| unsigned int last_error; |
| struct mutex port_mutex; |
| wait_queue_head_t dataq; |
| long timeout; |
| unsigned int best_mode; |
| unsigned int current_mode; |
| unsigned long bits; |
| }; |
| |
| /* |
| * The following constants describe the various signals of the printer port |
| * hardware. Note that the hardware inverts some signals and that some |
| * signals are active low. An example is LP_STROBE, which must be programmed |
| * with 1 for being active and 0 for being inactive, because the strobe signal |
| * gets inverted, but it is also active low. |
| */ |
| |
| |
| /* |
| * defines for 8255 control port |
| * base + 2 |
| * accessed with LP_C(minor) |
| */ |
| #define LP_PINTEN 0x10 /* high to read data in or-ed with data out */ |
| #define LP_PSELECP 0x08 /* inverted output, active low */ |
| #define LP_PINITP 0x04 /* unchanged output, active low */ |
| #define LP_PAUTOLF 0x02 /* inverted output, active low */ |
| #define LP_PSTROBE 0x01 /* short high output on raising edge */ |
| |
| /* |
| * the value written to ports to test existence. PC-style ports will |
| * return the value written. AT-style ports will return 0. so why not |
| * make them the same ? |
| */ |
| #define LP_DUMMY 0x00 |
| |
| /* |
| * This is the port delay time, in microseconds. |
| * It is used only in the lp_init() and lp_reset() routine. |
| */ |
| #define LP_DELAY 50 |
| |
| #endif |
| |
| #endif |
