diff options
Diffstat (limited to 'drv_generic_parport.c')
| -rw-r--r-- | drv_generic_parport.c | 81 |
1 files changed, 56 insertions, 25 deletions
diff --git a/drv_generic_parport.c b/drv_generic_parport.c index 8f3f3bd..3b5a36d 100644 --- a/drv_generic_parport.c +++ b/drv_generic_parport.c @@ -1,4 +1,4 @@ -/* $Id: drv_generic_parport.c 905 2008-12-23 13:37:07Z michael $ +/* $Id: drv_generic_parport.c 1165 2011-12-26 06:28:05Z michael $ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_generic_parport.c $ * * generic driver helper for serial and parport access @@ -39,13 +39,17 @@ #include <sys/stat.h> #include <sys/ioctl.h> +#ifdef WITH_OUTB #ifdef HAVE_SYS_IO_H #include <sys/io.h> -#define WITH_OUTB #else #ifdef HAVE_ASM_IO_H #include <asm/io.h> -#define WITH_OUTB +#else +#warning neither sys/io.h nor asm/io.h exists. +#warning raw port I/O will be disabled. +#undef WITH_OUTB +#endif #endif #endif @@ -88,8 +92,10 @@ static char *PPdev = NULL; /* Any bits set here will have their logic inverted at the parallel port */ static unsigned char inverted_control_bits = 0; +#ifdef WITH_OUTB /* initial value taken from linux/parport_pc.c */ static unsigned char ctr = 0xc; +#endif #ifdef WITH_PPDEV static int PPfd = -1; @@ -130,7 +136,6 @@ int drv_generic_parport_open(const char *section, const char *driver) #endif } #ifdef WITH_PPDEV - if (PPdev) { info("%s: using ppdev %s", Driver, PPdev); PPfd = open(PPdev, O_RDWR); @@ -147,15 +152,15 @@ int drv_generic_parport_open(const char *section, const char *driver) info("%s: got exclusive access to %s.", Driver, PPdev); } #endif - if (ioctl(PPfd, PPCLAIM)) { error("%s: ioctl(%s, PPCLAIM) failed: %d %s", Driver, PPdev, errno, strerror(errno)); return -1; } - } else + } #endif - { +#ifdef WITH_OUTB + if (Port) { error("using raw port 0x%x (deprecated!)", Port); error("You *really* should change your setup and use ppdev!"); if ((Port + 3) <= 0x3ff) { @@ -170,6 +175,7 @@ int drv_generic_parport_open(const char *section, const char *driver) } } } +#endif return 0; } @@ -187,9 +193,11 @@ int drv_generic_parport_close(void) return -1; } free(PPdev); - } else + } #endif - { + +#ifdef WITH_OUTB + if (Port) { debug("closing raw port 0x%x", Port); if ((Port + 3) <= 0x3ff) { if (ioperm(Port, 3, 0) != 0) { @@ -203,6 +211,7 @@ int drv_generic_parport_close(void) } } } +#endif return 0; } @@ -374,13 +383,16 @@ void drv_generic_parport_direction(const int direction) #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPDATADIR, &direction); - } else + } #endif - { + +#ifdef WITH_OUTB + if (Port) { /* code stolen from linux/parport_pc.h */ ctr = (ctr & ~0x20) ^ (direction ? 0x20 : 0x00); outb(ctr, Port + 2); } +#endif } @@ -395,11 +407,14 @@ unsigned char drv_generic_parport_status(void) #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPRSTATUS, &data); - } else + } #endif - { + +#ifdef WITH_OUTB + if (Port) { data = inb(Port + 1); } +#endif /* clear unused bits */ data &= mask; @@ -426,13 +441,16 @@ void drv_generic_parport_control(const unsigned char mask, const unsigned char v frob.mask = mask; frob.val = val; ioctl(PPfd, PPFCONTROL, &frob); - } else + } #endif - { + +#ifdef WITH_OUTB + if (Port) { /* code stolen from linux/parport_pc.h */ ctr = (ctr & ~mask) ^ val; outb(ctr, Port + 2); } +#endif } @@ -469,9 +487,11 @@ void drv_generic_parport_toggle(const unsigned char bits, const int level, const frob.val = value2; ioctl(PPfd, PPFCONTROL, &frob); - } else + } #endif - { + +#ifdef WITH_OUTB + if (Port) { /* rise */ ctr = (ctr & ~bits) ^ value1; outb(ctr, Port + 2); @@ -483,6 +503,7 @@ void drv_generic_parport_toggle(const unsigned char bits, const int level, const ctr = (ctr & ~bits) ^ value2; outb(ctr, Port + 2); } +#endif } @@ -491,41 +512,51 @@ void drv_generic_parport_data(const unsigned char data) #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPWDATA, &data); - } else + } #endif - { + +#ifdef WITH_OUTB + if (Port) { outb(data, Port); } +#endif } unsigned char drv_generic_parport_read(void) { - unsigned char data; + unsigned char data = 0; #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPRDATA, &data); - } else + } #endif - { + +#ifdef WITH_OUTB + if (Port) { data = inb(Port); } +#endif + return data; } void drv_generic_parport_debug(void) { - unsigned char control; + unsigned char control = 0; #ifdef WITH_PPDEV if (PPdev) { ioctl(PPfd, PPRCONTROL, &control); - } else + } #endif - { + +#ifdef WITH_OUTB + if (Port) { control = ctr; } +#endif debug("%cSTROBE %cAUTOFD %cINIT %cSLCTIN", control & PARPORT_CONTROL_STROBE ? '-' : '+', |