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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [char/] [lp_intern.c] - Rev 1626
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/* * split into mid and low-level for better support of different hardware * by Joerg Dorchain (dorchain@mpi-sb.mpg.de) * * Amiga printer device by Michael Rausch (linux@uni-koblenz.de); * Atari support added by Andreas Schwab (schwab@ls5.informatik.uni-dortmund.de); * based upon work from * * Copyright (C) 1992 by Jim Weigand and Linus Torvalds * Copyright (C) 1992,1993 by Michael K. Johnson * - Thanks much to Gunter Windau for pointing out to me where the error * checking ought to be. * Copyright (C) 1993 by Nigel Gamble (added interrupt code) */ #include <linux/config.h> #include <linux/lp_intern.h> #include <linux/kernel.h> #ifdef CONFIG_AMIGA #include <asm/amigahw.h> #endif #ifdef CONFIG_ATARI #include <linux/delay.h> #include <linux/sched.h> #include <linux/interrupt.h> #include <asm/atarihw.h> #endif static void lp_int_out(int, int); static int lp_int_busy(int); static int lp_int_pout(int); static int lp_int_online(int); static int lp_int_interrupt(int); int lp_internal_init(struct lp_struct *, int, int, int); static void lp_int_out (int c, int dev) { switch (boot_info.machtype) { #ifdef CONFIG_AMIGA case MACH_AMIGA: { int wait = 0; while (wait != lp_table[dev].wait) wait++; ciaa.prb = c; } break; #endif #ifdef CONFIG_ATARI case MACH_ATARI: { int wait = 0; sound_ym.rd_data_reg_sel = 15; sound_ym.wd_data = c; sound_ym.rd_data_reg_sel = 14; while (wait != lp_table[dev].wait) wait++; sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5); while (wait) wait--; sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5); break; } #endif } } static int lp_int_busy (int dev) { switch (boot_info.machtype) { #ifdef CONFIG_AMIGA case MACH_AMIGA: return ciab.pra & 1; #endif #ifdef CONFIG_ATARI case MACH_ATARI: return mfp.par_dt_reg & 1; #endif default: return 0; } } static int lp_int_pout (int dev) { switch (boot_info.machtype) { #ifdef CONFIG_AMIGA case MACH_AMIGA: return ciab.pra & 2; #endif #ifdef CONFIG_ATARI case MACH_ATARI: #endif default: return 0; } } static int lp_int_online (int dev) { switch (boot_info.machtype) { #ifdef CONFIG_AMIGA case MACH_AMIGA: return ciab.pra & 4; #endif #ifdef CONFIG_ATARI case MACH_ATARI: return !(mfp.par_dt_reg & 1); #endif default: return 0; } } static int lp_int_interrupt(int dev) { return 1; } int lp_internal_init(struct lp_struct *lp_table, int entry, int max_lp, int irq) { if (max_lp-entry < 1) return 0; #ifdef CONFIG_AMIGA if (MACH_IS_AMIGA) { ciaa.ddrb = 0xff; ciab.ddra &= 0xf8; } #endif #ifdef CONFIG_ATARI if (MACH_IS_ATARI) { unsigned long flags; save_flags(flags); cli(); sound_ym.rd_data_reg_sel = 7; sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0; restore_flags(flags); } #endif lp_table[entry].name = "Builtin LP"; lp_table[entry].lp_out = lp_int_out; lp_table[entry].lp_is_busy = lp_int_busy; lp_table[entry].lp_has_pout = lp_int_pout; lp_table[entry].lp_is_online = lp_int_online; lp_table[entry].lp_my_interrupt = lp_int_interrupt; lp_table[entry].flags = LP_EXIST; lp_table[entry].chars = LP_INIT_CHAR; lp_table[entry].time = LP_INIT_TIME; lp_table[entry].wait = LP_INIT_WAIT; lp_table[entry].lp_wait_q = NULL; printk("lp%d: internal port\n", entry); return 1; }
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