blob: 41a237c5957db19226bb35b31ec896ad9f8d0724 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 backpack.c (c) 2001 Micro Solutions Inc.
3 Released under the terms of the GNU General Public license
4
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)
8
9 Written by: Ken Hahn (linux-dev@micro-solutions.com)
10 Clive Turvey (linux-dev@micro-solutions.com)
11
12*/
13
14/*
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
20*/
21
22
23/* PARAMETERS */
24static int verbose; /* set this to 1 to see debugging messages and whatnot */
25
26#define BACKPACK_VERSION "2.0.2"
27
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>
33#include <asm/io.h>
34
35#if defined(CONFIG_PARPORT_MODULE)||defined(CONFIG_PARPORT)
36#include <linux/parport.h>
37#endif
38
39#include "ppc6lnx.c"
40#include "paride.h"
41
42
43
44#define PPCSTRUCT(pi) ((Interface *)(pi->private))
45
46/****************************************************************/
47/*
48 ATAPI CDROM DRIVE REGISTERS
49*/
50#define ATAPI_DATA 0 /* data port */
51#define ATAPI_ERROR 1 /* error register (read) */
52#define ATAPI_FEATURES 1 /* feature register (write) */
53#define ATAPI_INT_REASON 2 /* interrupt reason register */
54#define ATAPI_COUNT_LOW 4 /* byte count register (low) */
55#define ATAPI_COUNT_HIGH 5 /* byte count register (high) */
56#define ATAPI_DRIVE_SEL 6 /* drive select register */
57#define ATAPI_STATUS 7 /* status port (read) */
58#define ATAPI_COMMAND 7 /* command port (write) */
59#define ATAPI_ALT_STATUS 0x0e /* alternate status reg (read) */
60#define ATAPI_DEVICE_CONTROL 0x0e /* device control (write) */
61/****************************************************************/
62
63static int bpck6_read_regr(PIA *pi, int cont, int reg)
64{
65 unsigned int out;
66
67 /* check for bad settings */
68 if (reg<0 || reg>7 || cont<0 || cont>2)
69 {
70 return(-1);
71 }
72 out=ppc6_rd_port(PPCSTRUCT(pi),cont?reg|8:reg);
73 return(out);
74}
75
76static void bpck6_write_regr(PIA *pi, int cont, int reg, int val)
77{
78 /* check for bad settings */
79 if (reg>=0 && reg<=7 && cont>=0 && cont<=1)
80 {
81 ppc6_wr_port(PPCSTRUCT(pi),cont?reg|8:reg,(u8)val);
82 }
83}
84
85static void bpck6_write_block( PIA *pi, char * buf, int len )
86{
87 ppc6_wr_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
88}
89
90static void bpck6_read_block( PIA *pi, char * buf, int len )
91{
92 ppc6_rd_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
93}
94
95static void bpck6_connect ( PIA *pi )
96{
97 if(verbose)
98 {
99 printk(KERN_DEBUG "connect\n");
100 }
101
102 if(pi->mode >=2)
103 {
104 PPCSTRUCT(pi)->mode=4+pi->mode-2;
105 }
106 else if(pi->mode==1)
107 {
108 PPCSTRUCT(pi)->mode=3;
109 }
110 else
111 {
112 PPCSTRUCT(pi)->mode=1;
113 }
114
115 ppc6_open(PPCSTRUCT(pi));
116 ppc6_wr_extout(PPCSTRUCT(pi),0x3);
117}
118
119static void bpck6_disconnect ( PIA *pi )
120{
121 if(verbose)
122 {
123 printk("disconnect\n");
124 }
125 ppc6_wr_extout(PPCSTRUCT(pi),0x0);
126 ppc6_close(PPCSTRUCT(pi));
127}
128
129static int bpck6_test_port ( PIA *pi ) /* check for 8-bit port */
130{
131 if(verbose)
132 {
133 printk(KERN_DEBUG "PARPORT indicates modes=%x for lp=0x%lx\n",
134 ((struct pardevice*)(pi->pardev))->port->modes,
135 ((struct pardevice *)(pi->pardev))->port->base);
136 }
137
138 /*copy over duplicate stuff.. initialize state info*/
139 PPCSTRUCT(pi)->ppc_id=pi->unit;
140 PPCSTRUCT(pi)->lpt_addr=pi->port;
141
142#ifdef CONFIG_PARPORT_PC_MODULE
143#define CONFIG_PARPORT_PC
144#endif
145
146#ifdef CONFIG_PARPORT_PC
147 /* look at the parport device to see if what modes we can use */
148 if(((struct pardevice *)(pi->pardev))->port->modes &
149 (PARPORT_MODE_EPP)
150 )
151 {
152 return 5; /* Can do EPP*/
153 }
154 else if(((struct pardevice *)(pi->pardev))->port->modes &
155 (PARPORT_MODE_TRISTATE)
156 )
157 {
158 return 2;
159 }
160 else /*Just flat SPP*/
161 {
162 return 1;
163 }
164#else
165 /* there is no way of knowing what kind of port we have
166 default to the highest mode possible */
167 return 5;
168#endif
169}
170
171static int bpck6_probe_unit ( PIA *pi )
172{
173 int out;
174
175 if(verbose)
176 {
177 printk(KERN_DEBUG "PROBE UNIT %x on port:%x\n",pi->unit,pi->port);
178 }
179
180 /*SET PPC UNIT NUMBER*/
181 PPCSTRUCT(pi)->ppc_id=pi->unit;
182
183 /*LOWER DOWN TO UNIDIRECTIONAL*/
184 PPCSTRUCT(pi)->mode=1;
185
186 out=ppc6_open(PPCSTRUCT(pi));
187
188 if(verbose)
189 {
190 printk(KERN_DEBUG "ppc_open returned %2x\n",out);
191 }
192
193 if(out)
194 {
195 ppc6_close(PPCSTRUCT(pi));
196 if(verbose)
197 {
198 printk(KERN_DEBUG "leaving probe\n");
199 }
200 return(1);
201 }
202 else
203 {
204 if(verbose)
205 {
206 printk(KERN_DEBUG "Failed open\n");
207 }
208 return(0);
209 }
210}
211
212static void bpck6_log_adapter( PIA *pi, char * scratch, int verbose )
213{
214 char *mode_string[5]=
215 {"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
216
217 printk("%s: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n",pi->device);
218 printk("%s: Copyright 2001 by Micro Solutions, Inc., DeKalb IL.\n",pi->device);
219 printk("%s: BACKPACK %s, Micro Solutions BACKPACK Drive at 0x%x\n",
220 pi->device,BACKPACK_VERSION,pi->port);
221 printk("%s: Unit: %d Mode:%d (%s) Delay %d\n",pi->device,
222 pi->unit,pi->mode,mode_string[pi->mode],pi->delay);
223}
224
225static int bpck6_init_proto(PIA *pi)
226{
Eric Sesterhenn06ff37f2006-03-08 11:21:52 +0100227 Interface *p = kzalloc(sizeof(Interface), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
229 if (p) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 pi->private = (unsigned long)p;
231 return 0;
232 }
233
234 printk(KERN_ERR "%s: ERROR COULDN'T ALLOCATE MEMORY\n", pi->device);
235 return -1;
236}
237
238static void bpck6_release_proto(PIA *pi)
239{
240 kfree((void *)(pi->private));
241}
242
243static struct pi_protocol bpck6 = {
244 .owner = THIS_MODULE,
245 .name = "bpck6",
246 .max_mode = 5,
247 .epp_first = 2, /* 2-5 use epp (need 8 ports) */
248 .max_units = 255,
249 .write_regr = bpck6_write_regr,
250 .read_regr = bpck6_read_regr,
251 .write_block = bpck6_write_block,
252 .read_block = bpck6_read_block,
253 .connect = bpck6_connect,
254 .disconnect = bpck6_disconnect,
255 .test_port = bpck6_test_port,
256 .probe_unit = bpck6_probe_unit,
257 .log_adapter = bpck6_log_adapter,
258 .init_proto = bpck6_init_proto,
259 .release_proto = bpck6_release_proto,
260};
261
262static int __init bpck6_init(void)
263{
264 printk(KERN_INFO "bpck6: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n");
265 printk(KERN_INFO "bpck6: Copyright 2001 by Micro Solutions, Inc., DeKalb IL. USA\n");
266 if(verbose)
267 printk(KERN_DEBUG "bpck6: verbose debug enabled.\n");
268 return pi_register(&bpck6) - 1;
269}
270
271static void __exit bpck6_exit(void)
272{
273 pi_unregister(&bpck6);
274}
275
276MODULE_LICENSE("GPL");
277MODULE_AUTHOR("Micro Solutions Inc.");
278MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
279module_param(verbose, bool, 0644);
280module_init(bpck6_init)
281module_exit(bpck6_exit)