Home Home > GIT Browse > stable-xen
summaryrefslogtreecommitdiff
blob: ec64e7f5d1ce6398655aed2b589dd365b39337d2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
/*
	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)