2 backpack.c (c) 2001 Micro Solutions Inc.
3 Released under the terms of the GNU General Public license
5 backpack.c is a low-level protocol driver for the Micro Solutions
6 "BACKPACK" parallel port IDE adapter
7 (Works on Series 6 drives)
9 Written by: Ken Hahn (linux-dev@micro-solutions.com)
10 Clive Turvey (linux-dev@micro-solutions.com)
15 This is Ken's linux wrapper for the PPC library
16 Version 1.0.0 is the backpack driver for which source is not available
17 Version 2.0.0 is the first to have source released
18 Version 2.0.1 is the "Cox-ified" source code
19 Version 2.0.2 - fixed version string usage, and made ppc functions static
24 static int verbose
; /* set this to 1 to see debugging messages and whatnot */
26 #define BACKPACK_VERSION "2.0.2"
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/kernel.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
34 #include <linux/parport.h>
41 #define PPCSTRUCT(pi) ((Interface *)(pi->private))
43 /****************************************************************/
45 ATAPI CDROM DRIVE REGISTERS
47 #define ATAPI_DATA 0 /* data port */
48 #define ATAPI_ERROR 1 /* error register (read) */
49 #define ATAPI_FEATURES 1 /* feature register (write) */
50 #define ATAPI_INT_REASON 2 /* interrupt reason register */
51 #define ATAPI_COUNT_LOW 4 /* byte count register (low) */
52 #define ATAPI_COUNT_HIGH 5 /* byte count register (high) */
53 #define ATAPI_DRIVE_SEL 6 /* drive select register */
54 #define ATAPI_STATUS 7 /* status port (read) */
55 #define ATAPI_COMMAND 7 /* command port (write) */
56 #define ATAPI_ALT_STATUS 0x0e /* alternate status reg (read) */
57 #define ATAPI_DEVICE_CONTROL 0x0e /* device control (write) */
58 /****************************************************************/
60 static int bpck6_read_regr(PIA
*pi
, int cont
, int reg
)
64 /* check for bad settings */
65 if (reg
<0 || reg
>7 || cont
<0 || cont
>2)
69 out
=ppc6_rd_port(PPCSTRUCT(pi
),cont
?reg
|8:reg
);
73 static void bpck6_write_regr(PIA
*pi
, int cont
, int reg
, int val
)
75 /* check for bad settings */
76 if (reg
>=0 && reg
<=7 && cont
>=0 && cont
<=1)
78 ppc6_wr_port(PPCSTRUCT(pi
),cont
?reg
|8:reg
,(u8
)val
);
82 static void bpck6_write_block( PIA
*pi
, char * buf
, int len
)
84 ppc6_wr_port16_blk(PPCSTRUCT(pi
),ATAPI_DATA
,buf
,(u32
)len
>>1);
87 static void bpck6_read_block( PIA
*pi
, char * buf
, int len
)
89 ppc6_rd_port16_blk(PPCSTRUCT(pi
),ATAPI_DATA
,buf
,(u32
)len
>>1);
92 static void bpck6_connect ( PIA
*pi
)
96 printk(KERN_DEBUG
"connect\n");
101 PPCSTRUCT(pi
)->mode
=4+pi
->mode
-2;
105 PPCSTRUCT(pi
)->mode
=3;
109 PPCSTRUCT(pi
)->mode
=1;
112 ppc6_open(PPCSTRUCT(pi
));
113 ppc6_wr_extout(PPCSTRUCT(pi
),0x3);
116 static void bpck6_disconnect ( PIA
*pi
)
120 printk("disconnect\n");
122 ppc6_wr_extout(PPCSTRUCT(pi
),0x0);
123 ppc6_close(PPCSTRUCT(pi
));
126 static int bpck6_test_port ( PIA
*pi
) /* check for 8-bit port */
130 printk(KERN_DEBUG
"PARPORT indicates modes=%x for lp=0x%lx\n",
131 ((struct pardevice
*)(pi
->pardev
))->port
->modes
,
132 ((struct pardevice
*)(pi
->pardev
))->port
->base
);
135 /*copy over duplicate stuff.. initialize state info*/
136 PPCSTRUCT(pi
)->ppc_id
=pi
->unit
;
137 PPCSTRUCT(pi
)->lpt_addr
=pi
->port
;
139 /* look at the parport device to see if what modes we can use */
140 if(((struct pardevice
*)(pi
->pardev
))->port
->modes
&
144 return 5; /* Can do EPP*/
146 else if(((struct pardevice
*)(pi
->pardev
))->port
->modes
&
147 (PARPORT_MODE_TRISTATE
)
152 else /*Just flat SPP*/
158 static int bpck6_probe_unit ( PIA
*pi
)
164 printk(KERN_DEBUG
"PROBE UNIT %x on port:%x\n",pi
->unit
,pi
->port
);
167 /*SET PPC UNIT NUMBER*/
168 PPCSTRUCT(pi
)->ppc_id
=pi
->unit
;
170 /*LOWER DOWN TO UNIDIRECTIONAL*/
171 PPCSTRUCT(pi
)->mode
=1;
173 out
=ppc6_open(PPCSTRUCT(pi
));
177 printk(KERN_DEBUG
"ppc_open returned %2x\n",out
);
182 ppc6_close(PPCSTRUCT(pi
));
185 printk(KERN_DEBUG
"leaving probe\n");
193 printk(KERN_DEBUG
"Failed open\n");
199 static void bpck6_log_adapter( PIA
*pi
, char * scratch
, int verbose
)
201 char *mode_string
[5]=
202 {"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
204 printk("%s: BACKPACK Protocol Driver V"BACKPACK_VERSION
"\n",pi
->device
);
205 printk("%s: Copyright 2001 by Micro Solutions, Inc., DeKalb IL.\n",pi
->device
);
206 printk("%s: BACKPACK %s, Micro Solutions BACKPACK Drive at 0x%x\n",
207 pi
->device
,BACKPACK_VERSION
,pi
->port
);
208 printk("%s: Unit: %d Mode:%d (%s) Delay %d\n",pi
->device
,
209 pi
->unit
,pi
->mode
,mode_string
[pi
->mode
],pi
->delay
);
212 static int bpck6_init_proto(PIA
*pi
)
214 Interface
*p
= kzalloc(sizeof(Interface
), GFP_KERNEL
);
217 pi
->private = (unsigned long)p
;
221 printk(KERN_ERR
"%s: ERROR COULDN'T ALLOCATE MEMORY\n", pi
->device
);
225 static void bpck6_release_proto(PIA
*pi
)
227 kfree((void *)(pi
->private));
230 static struct pi_protocol bpck6
= {
231 .owner
= THIS_MODULE
,
234 .epp_first
= 2, /* 2-5 use epp (need 8 ports) */
236 .write_regr
= bpck6_write_regr
,
237 .read_regr
= bpck6_read_regr
,
238 .write_block
= bpck6_write_block
,
239 .read_block
= bpck6_read_block
,
240 .connect
= bpck6_connect
,
241 .disconnect
= bpck6_disconnect
,
242 .test_port
= bpck6_test_port
,
243 .probe_unit
= bpck6_probe_unit
,
244 .log_adapter
= bpck6_log_adapter
,
245 .init_proto
= bpck6_init_proto
,
246 .release_proto
= bpck6_release_proto
,
249 static int __init
bpck6_init(void)
251 printk(KERN_INFO
"bpck6: BACKPACK Protocol Driver V"BACKPACK_VERSION
"\n");
252 printk(KERN_INFO
"bpck6: Copyright 2001 by Micro Solutions, Inc., DeKalb IL. USA\n");
254 printk(KERN_DEBUG
"bpck6: verbose debug enabled.\n");
255 return paride_register(&bpck6
);
258 static void __exit
bpck6_exit(void)
260 paride_unregister(&bpck6
);
263 MODULE_LICENSE("GPL");
264 MODULE_AUTHOR("Micro Solutions Inc.");
265 MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
266 module_param(verbose
, bool, 0644);
267 module_init(bpck6_init
)
268 module_exit(bpck6_exit
)
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