patch-2.2.18 linux/drivers/char/lp_mfc.c

• Lines: 175
• Date: Fri Oct 13 23:57:54 2000
• Orig file: v2.2.17/drivers/char/lp_mfc.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/char/lp_mfc.c linux/drivers/char/lp_mfc.c
@@ -0,0 +1,174 @@
+/*
+ * lp driver for the parallel port of a Multiface Card III
+ * 6.11.95 Joerg Dorchain (dorchain@mpi-sb.mpg.de)
+ *
+ * ported to 2.0.18 and modularised
+ * 25.9.96 Joerg Dorchain
+ *
+ * ported to 2.1.42
+ * 24.6.97 Joerg Dorchain (jdorchain@i-con.de)
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/lp_m68k.h>
+#include <linux/lp_mfc.h>
+#include <linux/mc6821.h>
+#include <asm/amigahw.h>
+#include <linux/zorro.h>
+#include <asm/irq.h>
+#include <asm/setup.h>
+#include <asm/amigaints.h>
+#include "multiface.h"
+
+static void lp_mfc_out(int,int);
+static int lp_mfc_busy(int);
+static int lp_mfc_pout(int);
+static int lp_mfc_online(int);
+static void lp_mfc_interrupt(int, void *, struct pt_regs *);
+
+static inline struct pia *pia(int);
+
+static volatile int dummy; /* for trigger reads */
+static int minor[MAX_LP] = { -1, -1, -1, -1, -1 };
+MODULE_PARM(minor,"1-" __MODULE_STRING(MAX_LP) "i");
+#ifdef MODULE
+static unsigned int board_key[MAX_LP];
+#endif
+
+static void lp_mfc_out(int c, int dev)
+{
+int wait = 0;
+
+while (wait != lp_table[dev]->wait) wait++;
+dummy = pia(dev)->pprb; /* trigger read clears irq bit*/
+pia(dev)->pprb = c;  /* strobe goes down by hardware */
+}
+
+static int lp_mfc_busy(int dev)
+{
+return pia(dev)->ppra&1;
+}
+
+static int lp_mfc_pout(int dev)
+{
+return pia(dev)->ppra&2;
+}
+
+static int lp_mfc_online(int dev)
+{
+return pia(dev)->ppra&4;
+}
+
+static void lp_mfc_interrupt(int irq,void *data,struct pt_regs *fp)
+{
+int i;
+
+for( i=0; i<MAX_LP; i++)  /* test all lp's */
+	if (minor[i] != -1)  /* one of ours ? */
+		if (pia(minor[i])->crb&128) { /* has an irq? */
+			dummy = pia(minor[i])->pprb; /* clear bit */
+			lp_interrupt(minor[i]);
+		}
+}
+
+static inline struct pia *pia(int dev)
+{
+return lp_table[dev]->base;
+}
+
+static int lp_mfc_open(int dev)
+{
+MOD_INC_USE_COUNT;
+return 0;
+}
+
+static void lp_mfc_release(int dev)
+{
+MOD_DEC_USE_COUNT;
+}
+
+static struct lp_struct tab[MAX_LP] = {{0,},};
+
+__initfunc(int lp_mfc_init(void))
+{
+int pias;
+struct pia *pp;
+unsigned int key = 0;
+const struct ConfigDev *cd;
+
+if (!MACH_IS_AMIGA)
+  return -ENODEV;
+
+pias = 0;
+while((key = zorro_find(ZORRO_PROD_BSC_MULTIFACE_III, 0 , key))) {
+  cd = zorro_get_board( key );
+  pp = (struct pia *)ZTWO_VADDR((((u_char *)cd->cd_BoardAddr)+PIABASE));
+  if (pias < MAX_LP) {
+	pp->crb = 0;
+	pp->pddrb = 255;    /* all pins output */
+	pp->crb = PIA_DDR|32|8;
+	dummy = pp->pprb;
+	pp->crb |=(lp_irq!=0)?PIA_C1_ENABLE_IRQ:0; 
+	pp->cra = 0;
+	pp->pddra = 0xe0;   /* /RESET,  /DIR ,/AUTO-FEED output */
+	pp->cra = PIA_DDR;
+	pp->ppra = 0;    /* reset printer */
+	udelay(5);
+	pp->ppra |= 128;
+	tab[pias].name="Multiface III LP";
+	tab[pias].lp_out=lp_mfc_out;
+	tab[pias].lp_is_busy=lp_mfc_busy;
+	tab[pias].lp_has_pout=lp_mfc_pout;
+	tab[pias].lp_is_online=lp_mfc_online;
+	tab[pias].lp_ioctl=NULL;
+	tab[pias].lp_open=lp_mfc_open;
+	tab[pias].lp_release=lp_mfc_release;
+	tab[pias].flags=LP_EXIST;
+	tab[pias].chars=LP_INIT_CHAR;
+	tab[pias].time=LP_INIT_TIME;
+	tab[pias].wait=LP_INIT_WAIT;
+	tab[pias].lp_wait_q=NULL;
+	tab[pias].base=pp;
+	tab[pias].type=LP_MFC;
+	if ((minor[pias] = register_parallel(tab + pias, minor[pias] )) >= 0) {
+	  zorro_config_board( key, 0 );
+#ifdef MODULE
+	  board_key[minor[pias]] = key;
+#endif
+	  pias++;
+	}
+	else
+	  printk("mfc_init: cant get a minor for pia at 0x%08lx\n",(long)pp);
+  }
+}
+if ((pias != 0) && (lp_irq != 0))
+  request_irq(IRQ_AMIGA_PORTS, lp_mfc_interrupt, 0,
+    "Multiface III printer", lp_mfc_interrupt);
+
+return (pias==0)?-ENODEV:0;
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+return lp_mfc_init();
+}
+
+void cleanup_module(void)
+{
+int i;
+
+if (lp_irq)
+  free_irq(IRQ_AMIGA_PORTS, lp_mfc_interrupt);
+for(i = 0; i < MAX_LP; i++)
+  if ((lp_table[i] != NULL) && (lp_table[i]->type == LP_MFC)) {
+    unregister_parallel(i);
+    zorro_unconfig_board(board_key[i], 0);
+  }
+}
+#endif