--- /dev/null
+/*
+ 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)
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