patch-2.3.12 linux/drivers/misc/parport_amiga.c

• Lines: 313
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.11/linux/drivers/misc/parport_amiga.c
• Orig date: Mon Jun 7 12:10:10 1999

diff -u --recursive --new-file v2.3.11/linux/drivers/misc/parport_amiga.c linux/drivers/misc/parport_amiga.c
@@ -1,312 +0,0 @@
-/* Low-level parallel port routines for the Amiga buildin port
- *
- * Author: Joerg Dorchain <dorchain@wirbel.com>
- *
- * This is a complete rewrite of the code, but based heaviy upon the old
- * lp_intern. code.
- *
- * The built-in Amiga parallel port provides one port at a fixed address
- * with 8 bisdirecttional data lines (D0 - D7) and 3 bidirectional status
- * lines (BUSY, POUT, SEL), 1 output control line /STROBE (raised automatically in
- * hardware when the data register is accessed), and 1 input control line
- * /ACK, able to cause an interrupt, but both not directly settable by
- * software.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/parport.h>
-#include <asm/setup.h>
-#include <asm/amigahw.h>
-#include <asm/irq.h>
-#include <asm/amigaints.h>
-
-#undef DEBUG
-#ifdef DEBUG
-#define DPRINTK printk
-#else
-static inline int DPRINTK() {return 0;}
-#endif
-
-static struct parport *this_port = NULL;
-
-static void amiga_write_data(struct parport *p, unsigned char data)
-{
-DPRINTK("write_data %c\n",data);
-	/* Triggers also /STROBE. This behavior cannot be changed */
-	ciaa.prb = data;
-}
-
-static unsigned char amiga_read_data(struct parport *p)
-{
-	/* Triggers also /STROBE. This behavior cannot be changed */
-	return ciaa.prb;
-}
-
-#if 0
-static unsigned char control_pc_to_amiga(unsigned char control)
-{
-	unsigned char ret = 0;
-
-	if (control & PARPORT_CONTROL_DIRECTION) /* XXX: What is this? */
-		;
-	if (control & PARPORT_CONTROL_INTEN) /* XXX: What is INTEN? */
-		;
-	if (control & PARPORT_CONTROL_SELECT) /* XXX: What is SELECP? */
-		;
-	if (control & PARPORT_CONTROL_INIT) /* INITP */
-		/* reset connected to cpu reset pin */;
-	if (control & PARPORT_CONTROL_AUTOFD) /* AUTOLF */
-		/* Not connected */;
-	if (control & PARPORT_CONTROL_STROBE) /* Strobe */
-		/* Handled only directly by hardware */;
-	return ret;
-}
-#endif
-
-static unsigned char control_amiga_to_pc(unsigned char control)
-{
-	return PARPORT_CONTROL_INTEN | PARPORT_CONTROL_SELECT |
-	      PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_STROBE;
-	/* fake value: interrupt enable, select in, no reset,
-	no autolf, no strobe - seems to be closest the wiring diagram */
-}
-
-static void amiga_write_control(struct parport *p, unsigned char control)
-{
-DPRINTK("write_control %02x\n",control);
-	/* No implementation possible */
-}
-	
-static unsigned char amiga_read_control( struct parport *p)
-{
-DPRINTK("read_control \n");
-	return control_amiga_to_pc(0);
-}
-
-static unsigned char amiga_frob_control( struct parport *p, unsigned char mask, unsigned char val)
-{
-	unsigned char old;
-
-DPRINTK("frob_control mask %02x, value %02x\n",mask,val);
-	old = amiga_read_control(p);
-	amiga_write_control(p, (old & ~mask) ^ val);
-	return old;
-}
-
-
-static unsigned char status_pc_to_amiga(unsigned char status)
-{
-	unsigned char ret = 1;
-
-	if (status & PARPORT_STATUS_BUSY) /* Busy */
-		ret &= ~1;
-	if (status & PARPORT_STATUS_ACK) /* Ack */
-		/* handled in hardware */;
-	if (status & PARPORT_STATUS_PAPEROUT) /* PaperOut */
-		ret |= 2;
-	if (status & PARPORT_STATUS_SELECT) /* select */
-		ret |= 4;
-	if (status & PARPORT_STATUS_ERROR) /* error */
-		/* not connected */;
-	return ret;
-}
-
-static unsigned char status_amiga_to_pc(unsigned char status)
-{
-	unsigned char ret = PARPORT_STATUS_BUSY | PARPORT_STATUS_ACK | PARPORT_STATUS_ERROR;
-
-	if (status & 1) /* Busy */
-		ret &= ~PARPORT_STATUS_BUSY;
-	if (status & 2) /* PaperOut */
-		ret |= PARPORT_STATUS_PAPEROUT;
-	if (status & 4) /* Selected */
-		ret |= PARPORT_STATUS_SELECT;
-	/* the rest is not connected or handled autonomously in hardware */
-
-	return ret;
-}
-
-static void amiga_write_status( struct parport *p, unsigned char status)
-{
-DPRINTK("write_status %02x\n",status);
-	ciab.pra |= (ciab.pra & 0xf8) | status_pc_to_amiga(status);
-}
-
-static unsigned char amiga_read_status(struct parport *p)
-{
-	unsigned char status;
-
-	status = status_amiga_to_pc(ciab.pra & 7);
-DPRINTK("read_status %02x\n", status);
-	return status;
-}
-
-static void amiga_change_mode( struct parport *p, int m)
-{
-	/* XXX: This port only has one mode, and I am
-	not sure about the corresponding PC-style mode*/
-}
-
-/* as this ports irq handling is already done, we use a generic funktion */
-static void amiga_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
-	parport_generic_irq(irq, (struct parport *) dev_id, regs);
-}
-
-
-static void amiga_init_state(struct parport_state *s)
-{
-	s->u.amiga.data = 0;
-	s->u.amiga.datadir = 255;
-	s->u.amiga.status = 0;
-	s->u.amiga.statusdir = 0;
-}
-
-static void amiga_save_state(struct parport *p, struct parport_state *s)
-{
-	s->u.amiga.data = ciaa.prb;
-	s->u.amiga.datadir = ciaa.ddrb;
-	s->u.amiga.status = ciab.pra & 7;
-	s->u.amiga.statusdir = ciab.ddra & 7;
-}
-
-static void amiga_restore_state(struct parport *p, struct parport_state *s)
-{
-	ciaa.prb = s->u.amiga.data;
-	ciaa.ddrb = s->u.amiga.datadir;
-	ciab.pra |= (ciab.pra & 0xf8) | s->u.amiga.status;
-	ciab.ddra |= (ciab.ddra & 0xf8) | s->u.amiga.statusdir;
-}
-
-static void amiga_enable_irq(struct parport *p)
-{
-	enable_irq(IRQ_AMIGA_CIAA_FLG);
-}
-
-static void amiga_disable_irq(struct parport *p)
-{
-	disable_irq(IRQ_AMIGA_CIAA_FLG);
-}
-
-static void amiga_inc_use_count(void)
-{
-	MOD_INC_USE_COUNT;
-}
-
-static void amiga_dec_use_count(void)
-{
-	MOD_DEC_USE_COUNT;
-}
-
-static void amiga_fill_inode(struct inode *inode, int fill)
-{
-#ifdef MODULE
-	if (fill)
-		MOD_INC_USE_COUNT;
-	else
-		MOD_DEC_USE_COUNT;
-#endif
-}
-
-static struct parport_operations pp_amiga_ops = {
-	amiga_write_data,
-	amiga_read_data,
-
-	amiga_write_control,
-	amiga_read_control,
-	amiga_frob_control,
-
-	NULL, /* write_econtrol */
-	NULL, /* read_econtrol */
-	NULL, /* frob_econtrol */
-
-	amiga_write_status,
-	amiga_read_status,
-
-	NULL, /* write fifo */
-	NULL, /* read fifo */
-
-	amiga_change_mode,
-
-
-	NULL, /* epp_write_data */
-	NULL, /* epp_read_data */
-	NULL, /* epp_write_addr */
-	NULL, /* epp_read_addr */
-	NULL, /* epp_check_timeout */
-
-	NULL, /* epp_write_block */
-	NULL, /* epp_read_block */
-
-	NULL, /* ecp_write_block */
-	NULL, /* ecp_read_block */
-
-	amiga_init_state,
-	amiga_save_state,
-	amiga_restore_state,
-
-	amiga_enable_irq,
-	amiga_disable_irq,
-	amiga_interrupt, 
-
-	amiga_inc_use_count,
-	amiga_dec_use_count,
-	amiga_fill_inode
-};
-
-/* ----------- Initialisation code --------------------------------- */
-
-__initfunc(int parport_amiga_init(void))
-{
-	struct parport *p;
-
-	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(AMI_PARALLEL)) {
-		ciaa.ddrb = 0xff;
-		ciab.ddra &= 0xf8;
-		if (!(p = parport_register_port((unsigned long)&ciaa.prb,
-					IRQ_AMIGA_CIAA_FLG, PARPORT_DMA_NONE,
-					&pp_amiga_ops)))
-			return 0;
-		this_port = p;
-		printk(KERN_INFO "%s: Amiga built-in port using irq\n", p->name);
-		/* XXX: set operating mode */
-		parport_proc_register(p);
-		if (request_irq(IRQ_AMIGA_CIAA_FLG, amiga_interrupt, 0,
-				p->name, p)) {
-			parport_unregister_port (p);
-			return 0;
-		}
-
-		if (parport_probe_hook)
-			(*parport_probe_hook)(p);
-
-		parport_announce_port (p);
-
-		return 1;
-
-	}
-	return 0;
-}
-
-#ifdef MODULE
-
-MODULE_AUTHOR("Joerg Dorchain");
-MODULE_DESCRIPTION("Parport Driver for Amiga builtin Port");
-MODULE_SUPPORTED_DEVICE("Amiga builtin Parallel Port");
-
-int init_module(void)
-{
-	return ! parport_amiga_init();
-}
-
-void cleanup_module(void)
-{
-	if (p->irq != PARPORT_IRQ_NONE)
-		free_irq(IRQ_AMIGA_CIAA_FLG, p);
-	parport_proc_unregister(this_port);
-	parport_unregister_port(this_port);
-}
-#endif
-
-