268 lines
6.3 KiB
C
268 lines
6.3 KiB
C
|
/*
|
||
|
|
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
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#define BACKPACK_VERSION "2.0.2"
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
#include <linux/parport.h>
|
||
|
|
|
||
|
|
#include "ppc6lnx.c"
|
||
|
|
#include "paride.h"
|
||
|
|
|
||
|
|
/* PARAMETERS */
|
||
|
|
static bool verbose; /* set this to 1 to see debugging messages and whatnot */
|
||
|
|
|
||
|
|
|
||
|
|
#define PPCSTRUCT(pi) ((Interface *)(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;
|
||
|
|
|
||
|
|
/* 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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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));
|
||
|
|
if(verbose)
|
||
|
|
{
|
||
|
|
printk(KERN_DEBUG "leaving probe\n");
|
||
|
|
}
|
||
|
|
return(1);
|
||
|
|
}
|
||
|
|
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 int bpck6_init_proto(PIA *pi)
|
||
|
|
{
|
||
|
|
Interface *p = kzalloc(sizeof(Interface), GFP_KERNEL);
|
||
|
|
|
||
|
|
if (p) {
|
||
|
|
pi->private = (unsigned long)p;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
printk(KERN_ERR "%s: ERROR COULDN'T ALLOCATE MEMORY\n", pi->device);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void bpck6_release_proto(PIA *pi)
|
||
|
|
{
|
||
|
|
kfree((void *)(pi->private));
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct pi_protocol bpck6 = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.name = "bpck6",
|
||
|
|
.max_mode = 5,
|
||
|
|
.epp_first = 2, /* 2-5 use epp (need 8 ports) */
|
||
|
|
.max_units = 255,
|
||
|
|
.write_regr = bpck6_write_regr,
|
||
|
|
.read_regr = bpck6_read_regr,
|
||
|
|
.write_block = bpck6_write_block,
|
||
|
|
.read_block = bpck6_read_block,
|
||
|
|
.connect = bpck6_connect,
|
||
|
|
.disconnect = bpck6_disconnect,
|
||
|
|
.test_port = bpck6_test_port,
|
||
|
|
.probe_unit = bpck6_probe_unit,
|
||
|
|
.log_adapter = bpck6_log_adapter,
|
||
|
|
.init_proto = bpck6_init_proto,
|
||
|
|
.release_proto = bpck6_release_proto,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init bpck6_init(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 paride_register(&bpck6);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit bpck6_exit(void)
|
||
|
|
{
|
||
|
|
paride_unregister(&bpck6);
|
||
|
|
}
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_AUTHOR("Micro Solutions Inc.");
|
||
|
|
MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
|
||
|
|
module_param(verbose, bool, 0644);
|
||
|
|
module_init(bpck6_init)
|
||
|
|
module_exit(bpck6_exit)
|