patch-2.4.4 linux/drivers/block/paride/bpck6.c

• Lines: 318
• Date: Thu Apr 12 12:16:35 2001
• Orig file: v2.4.3/linux/drivers/block/paride/bpck6.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/drivers/block/paride/bpck6.c linux/drivers/block/paride/bpck6.c
@@ -0,0 +1,317 @@
+/*
+	backpack.c (c) 2001 Micro Solutions Inc.
+		Released under the terms of the GNU General Public license
+
+	backpack.c is a low-level protocol driver for the Micro Solutions
+		"BACKPACK" parallel port IDE adapter
+		(Works on Series 6 drives)
+
+	Written by: Ken Hahn     (linux-dev@micro-solutions.com)
+	            Clive Turvey (linux-dev@micro-solutions.com)
+
+*/
+
+/*
+   This is Ken's linux wrapper for the PPC library
+   Version 1.0.0 is the backpack driver for which source is not available
+   Version 2.0.0 is the first to have source released 
+   Version 2.0.1 is the "Cox-ified" source code 
+   Version 2.0.2 - fixed version string usage, and made ppc functions static 
+*/
+
+
+/* PARAMETERS */
+int verbose=0; /* set this to 1 to see debugging messages and whatnot */
+
+#define BACKPACK_VERSION "2.0.2"
+
+#define EXPORT_SYMTAB 
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/malloc.h>
+#include <linux/types.h>
+#include <asm/io.h>
+
+#if defined(CONFIG_PARPORT_MODULE)||defined(CONFIG_PARPORT)
+#include <linux/parport.h>
+#endif
+
+#include "ppc6lnx.c"
+#include "paride.h"
+
+ 
+
+#define PPCSTRUCT(pi) ((PPC *)(pi->private))
+
+/****************************************************************/
+/*
+ ATAPI CDROM DRIVE REGISTERS
+*/
+#define ATAPI_DATA       0      /* data port                  */
+#define ATAPI_ERROR      1      /* error register (read)      */
+#define ATAPI_FEATURES   1      /* feature register (write)   */
+#define ATAPI_INT_REASON 2      /* interrupt reason register  */
+#define ATAPI_COUNT_LOW  4      /* byte count register (low)  */
+#define ATAPI_COUNT_HIGH 5      /* byte count register (high) */
+#define ATAPI_DRIVE_SEL  6      /* drive select register      */
+#define ATAPI_STATUS     7      /* status port (read)         */
+#define ATAPI_COMMAND    7      /* command port (write)       */
+#define ATAPI_ALT_STATUS 0x0e /* alternate status reg (read) */
+#define ATAPI_DEVICE_CONTROL 0x0e /* device control (write)   */
+/****************************************************************/
+
+static int bpck6_read_regr(PIA *pi, int cont, int reg)
+{
+	unsigned int out;
+
+	/* check for bad settings */
+	if (reg<0 || reg>7 || cont<0 || cont>2)
+	{
+		return(-1);
+	}
+	out=ppc6_rd_port(PPCSTRUCT(pi),cont?reg|8:reg);
+	return(out);
+}
+
+static void bpck6_write_regr(PIA *pi, int cont, int reg, int val)
+{
+	/* check for bad settings */
+	if (reg>=0 && reg<=7 && cont>=0 && cont<=1)
+	{
+		ppc6_wr_port(PPCSTRUCT(pi),cont?reg|8:reg,(u8)val);
+	}
+}
+
+static void bpck6_write_block( PIA *pi, char * buf, int len )
+{
+	ppc6_wr_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1); 
+}
+
+static void bpck6_read_block( PIA *pi, char * buf, int len )
+{
+	ppc6_rd_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
+}
+
+static void bpck6_connect ( PIA *pi  )
+{
+	if(verbose)
+	{
+		printk(KERN_DEBUG "connect\n");
+	}
+
+	if(pi->mode >=2)
+  	{
+		PPCSTRUCT(pi)->mode=4+pi->mode-2;	
+	}
+	else if(pi->mode==1)
+	{
+		PPCSTRUCT(pi)->mode=3;	
+	}
+	else
+	{
+		PPCSTRUCT(pi)->mode=1;		
+	}
+
+	ppc6_open(PPCSTRUCT(pi));  
+	ppc6_wr_extout(PPCSTRUCT(pi),0x3);
+}
+
+static void bpck6_disconnect ( PIA *pi )
+{
+	if(verbose)
+	{
+		printk("disconnect\n");
+	}
+	ppc6_wr_extout(PPCSTRUCT(pi),0x0);
+	ppc6_close(PPCSTRUCT(pi));
+}
+
+static int bpck6_test_port ( PIA *pi )   /* check for 8-bit port */
+{
+	if(verbose)
+	{
+		printk(KERN_DEBUG "PARPORT indicates modes=%x for lp=0x%lx\n",
+               		((struct pardevice*)(pi->pardev))->port->modes,
+			((struct pardevice *)(pi->pardev))->port->base); 
+	}
+
+	/*copy over duplicate stuff.. initialize state info*/
+	PPCSTRUCT(pi)->ppc_id=pi->unit;
+	PPCSTRUCT(pi)->lpt_addr=pi->port;
+
+#ifdef CONFIG_PARPORT_PC_MODULE
+#define CONFIG_PARPORT_PC
+#endif
+
+#ifdef CONFIG_PARPORT_PC
+	/* look at the parport device to see if what modes we can use */
+	if(((struct pardevice *)(pi->pardev))->port->modes & 
+		(PARPORT_MODE_EPP)
+          )
+	{
+		return 5; /* Can do EPP*/
+	}
+	else if(((struct pardevice *)(pi->pardev))->port->modes & 
+			(PARPORT_MODE_TRISTATE)
+               )
+	{
+		return 2;
+	}
+	else /*Just flat SPP*/
+	{
+		return 1;
+	}
+#else
+	/* there is no way of knowing what kind of port we have
+	   default to the highest mode possible */
+	return 5;
+#endif
+}
+
+static int bpck6_probe_unit ( PIA *pi )
+{
+	int out;
+
+	if(verbose)
+	{
+		printk(KERN_DEBUG "PROBE UNIT %x on port:%x\n",pi->unit,pi->port);
+	}
+
+	/*SET PPC UNIT NUMBER*/
+	PPCSTRUCT(pi)->ppc_id=pi->unit;
+
+	/*LOWER DOWN TO UNIDIRECTIONAL*/
+	PPCSTRUCT(pi)->mode=1;		
+
+	out=ppc6_open(PPCSTRUCT(pi));
+
+	if(verbose)
+	{
+		printk(KERN_DEBUG "ppc_open returned %2x\n",out);
+	}
+
+  	if(out)
+ 	{
+		ppc6_close(PPCSTRUCT(pi));
+		return(1);	
+		if(verbose)
+		{
+			printk(KERN_DEBUG "leaving probe\n");
+		}
+	}
+  	else
+  	{
+		if(verbose)
+		{
+			printk(KERN_DEBUG "Failed open\n");
+		}
+    		return(0);
+  	}
+}
+
+static void bpck6_log_adapter( PIA *pi, char * scratch, int verbose )
+{
+	char *mode_string[5]=
+		{"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
+
+	printk("%s: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n",pi->device);
+	printk("%s: Copyright 2001 by Micro Solutions, Inc., DeKalb IL.\n",pi->device);
+	printk("%s: BACKPACK %s, Micro Solutions BACKPACK Drive at 0x%x\n",
+		pi->device,BACKPACK_VERSION,pi->port);
+	printk("%s: Unit: %d Mode:%d (%s) Delay %d\n",pi->device,
+		pi->unit,pi->mode,mode_string[pi->mode],pi->delay);
+}
+
+static void bpck6_init_proto(PIA *pi)
+{
+	int i;
+
+	/* allocate a state structure for this item */
+	pi->private=(int)kmalloc(sizeof(PPC),GFP_KERNEL);
+
+	if(pi->private==(int)NULL)
+	{
+		printk(KERN_ERR "%s: ERROR COULDN'T ALLOCATE MEMORY\n",pi->device); 
+		return;
+	}
+	else
+	{	
+		MOD_INC_USE_COUNT; 
+	}
+
+	for(i=0;i<sizeof(PPC);i++)
+	{
+		((unsigned char *)(pi->private))[i]=0;
+	}
+}
+
+static void bpck6_release_proto(PIA *pi)
+{
+	MOD_DEC_USE_COUNT;
+	/* free after use count decremented so that we aren't using it
+		when it is decremented */
+	kfree((void *)(pi->private)); 
+}
+
+struct pi_protocol bpck6 = { "bpck6", /* name for proto*/
+				0, /* index into proto table */
+				5, /* max mode =5 */
+				2, /* 2-5 use epp (need 8 ports) */
+				0, /* no delay (not used anyway) */
+				255, /* we can have units  up to 255 */
+				bpck6_write_regr,
+				bpck6_read_regr,
+				bpck6_write_block,
+				bpck6_read_block,
+				bpck6_connect,
+				bpck6_disconnect,
+				bpck6_test_port,
+ 				bpck6_probe_unit,
+				0,
+				bpck6_log_adapter,
+				bpck6_init_proto,
+				bpck6_release_proto
+                        };
+
+
+EXPORT_SYMBOL(bpck6_write_regr);
+EXPORT_SYMBOL(bpck6_read_regr);
+EXPORT_SYMBOL(bpck6_write_block);
+EXPORT_SYMBOL(bpck6_read_block);
+EXPORT_SYMBOL(bpck6_connect);
+EXPORT_SYMBOL(bpck6_disconnect);
+EXPORT_SYMBOL(bpck6_test_port);
+EXPORT_SYMBOL(bpck6_probe_unit);
+EXPORT_SYMBOL(bpck6_log_adapter);
+EXPORT_SYMBOL(bpck6_init_proto);
+EXPORT_SYMBOL(bpck6_release_proto);
+
+/*---------------------------MODULE STUFF-----------------------*/
+
+#ifdef MODULE
+/*module information*/
+
+static int init_module(void)
+{
+	printk(KERN_INFO "bpck6: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n");
+	printk(KERN_INFO "bpck6: Copyright 2001 by Micro Solutions, Inc., DeKalb IL. USA\n");
+
+	if(verbose)
+	{
+		printk(KERN_DEBUG "bpck6: verbose debug enabled.\n");
+	}
+
+	return pi_register(&bpck6) - 1;  
+}
+
+void    cleanup_module(void)
+{
+	pi_unregister(&bpck6);
+}
+
+MODULE_AUTHOR("Micro Solutions Inc.");
+MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
+MODULE_PARM(verbose,"i");
+
+#endif
+