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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [char/] [lp_intern.c] - Blame information for rev 1782

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Line No. Rev Author Line
1 199 simons
 
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/*
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 * split into mid and low-level for better support of different hardware
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 * by Joerg Dorchain (dorchain@mpi-sb.mpg.de)
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 *
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 * Amiga printer device by Michael Rausch (linux@uni-koblenz.de);
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 * Atari support added by Andreas Schwab (schwab@ls5.informatik.uni-dortmund.de);
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 * based upon work from
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 *
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 * Copyright (C) 1992 by Jim Weigand and Linus Torvalds
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 * Copyright (C) 1992,1993 by Michael K. Johnson
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 * - Thanks much to Gunter Windau for pointing out to me where the error
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 *   checking ought to be.
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 * Copyright (C) 1993 by Nigel Gamble (added interrupt code)
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 */
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#include <linux/config.h>
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#include <linux/lp_intern.h>
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#include <linux/kernel.h>
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#ifdef CONFIG_AMIGA
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#include <asm/amigahw.h>
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#endif
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#ifdef CONFIG_ATARI
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <asm/atarihw.h>
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#endif
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static void lp_int_out(int, int);
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static int lp_int_busy(int);
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static int lp_int_pout(int);
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static int lp_int_online(int);
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static int lp_int_interrupt(int);
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int lp_internal_init(struct lp_struct *, int, int, int);
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static void
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lp_int_out (int c, int dev)
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{
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  switch (boot_info.machtype)
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    {
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#ifdef CONFIG_AMIGA
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    case MACH_AMIGA:
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       {
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        int wait = 0;
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        while (wait != lp_table[dev].wait) wait++;
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        ciaa.prb = c;
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       }
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      break;
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#endif
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#ifdef CONFIG_ATARI
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    case MACH_ATARI:
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       {
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         int wait = 0;
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         sound_ym.rd_data_reg_sel = 15;
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         sound_ym.wd_data = c;
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         sound_ym.rd_data_reg_sel = 14;
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         while (wait != lp_table[dev].wait) wait++;
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         sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5);
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         while (wait) wait--;
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         sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
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         break;
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       }
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#endif
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    }
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}
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static int
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lp_int_busy (int dev)
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{
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  switch (boot_info.machtype)
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    {
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#ifdef CONFIG_AMIGA
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    case MACH_AMIGA:
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      return ciab.pra & 1;
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#endif
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#ifdef CONFIG_ATARI
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    case MACH_ATARI:
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      return mfp.par_dt_reg & 1;
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#endif
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    default:
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      return 0;
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    }
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}
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static int
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lp_int_pout (int dev)
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{
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  switch (boot_info.machtype)
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    {
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#ifdef CONFIG_AMIGA
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    case MACH_AMIGA:
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      return ciab.pra & 2;
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#endif
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#ifdef CONFIG_ATARI
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    case MACH_ATARI:
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#endif
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    default:
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      return 0;
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    }
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}
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static int
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lp_int_online (int dev)
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{
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  switch (boot_info.machtype)
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    {
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#ifdef CONFIG_AMIGA
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    case MACH_AMIGA:
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      return ciab.pra & 4;
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#endif
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#ifdef CONFIG_ATARI
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    case MACH_ATARI:
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      return !(mfp.par_dt_reg & 1);
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#endif
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    default:
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      return 0;
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    }
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}
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static int lp_int_interrupt(int dev)
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{
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  return 1;
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}
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int lp_internal_init(struct lp_struct *lp_table, int entry,
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                     int max_lp, int irq)
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{
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  if (max_lp-entry < 1)
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    return 0;
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#ifdef CONFIG_AMIGA
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  if (MACH_IS_AMIGA)
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    {
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      ciaa.ddrb = 0xff;
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      ciab.ddra &= 0xf8;
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    }
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#endif
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#ifdef CONFIG_ATARI
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  if (MACH_IS_ATARI)
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    {
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      unsigned long flags;
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      save_flags(flags);
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      cli();
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      sound_ym.rd_data_reg_sel = 7;
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      sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0;
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      restore_flags(flags);
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    }
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#endif
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  lp_table[entry].name = "Builtin LP";
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  lp_table[entry].lp_out = lp_int_out;
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  lp_table[entry].lp_is_busy = lp_int_busy;
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  lp_table[entry].lp_has_pout = lp_int_pout;
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  lp_table[entry].lp_is_online = lp_int_online;
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  lp_table[entry].lp_my_interrupt = lp_int_interrupt;
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  lp_table[entry].flags = LP_EXIST;
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  lp_table[entry].chars = LP_INIT_CHAR;
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  lp_table[entry].time = LP_INIT_TIME;
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  lp_table[entry].wait = LP_INIT_WAIT;
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  lp_table[entry].lp_wait_q = NULL;
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  printk("lp%d: internal port\n", entry);
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  return 1;
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}
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