1 files changed, 282 insertions, 0 deletions

diff --git a/drivers/block/paride/bpck6.c b/drivers/block/paride/bpck6.c
new file mode 100644
index 000000000000..08d858ad64db
--- /dev/null
+++ b/drivers/block/paride/bpck6.c
@@ -0,0 +1,282 @@
+/*
+        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 */
+static int verbose; /* set this to 1 to see debugging messages and whatnot */
+
+#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>
+
+#if defined(CONFIG_PARPORT_MODULE)||defined(CONFIG_PARPORT)
+#include <linux/parport.h>
+#endif
+
+#include "ppc6lnx.c"
+#include "paride.h"
+
+ 
+
+#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;
+
+#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));
+                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 = kmalloc(sizeof(Interface), GFP_KERNEL);
+
+        if (p) {
+                memset(p, 0, sizeof(Interface));
+                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 pi_register(&bpck6) - 1;  
+}
+
+static void __exit bpck6_exit(void)
+{
+        pi_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)