Commit | Line | Data |
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1da177e4 LT |
1 | /* |
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 | ||
1da177e4 LT |
23 | #define BACKPACK_VERSION "2.0.2" |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/types.h> | |
30 | #include <asm/io.h> | |
1da177e4 | 31 | #include <linux/parport.h> |
1da177e4 LT |
32 | |
33 | #include "ppc6lnx.c" | |
34 | #include "paride.h" | |
35 | ||
90ab5ee9 RR |
36 | /* PARAMETERS */ |
37 | static bool verbose; /* set this to 1 to see debugging messages and whatnot */ | |
1da177e4 LT |
38 | |
39 | ||
40 | #define PPCSTRUCT(pi) ((Interface *)(pi->private)) | |
41 | ||
42 | /****************************************************************/ | |
43 | /* | |
44 | ATAPI CDROM DRIVE REGISTERS | |
45 | */ | |
46 | #define ATAPI_DATA 0 /* data port */ | |
47 | #define ATAPI_ERROR 1 /* error register (read) */ | |
48 | #define ATAPI_FEATURES 1 /* feature register (write) */ | |
49 | #define ATAPI_INT_REASON 2 /* interrupt reason register */ | |
50 | #define ATAPI_COUNT_LOW 4 /* byte count register (low) */ | |
51 | #define ATAPI_COUNT_HIGH 5 /* byte count register (high) */ | |
52 | #define ATAPI_DRIVE_SEL 6 /* drive select register */ | |
53 | #define ATAPI_STATUS 7 /* status port (read) */ | |
54 | #define ATAPI_COMMAND 7 /* command port (write) */ | |
55 | #define ATAPI_ALT_STATUS 0x0e /* alternate status reg (read) */ | |
56 | #define ATAPI_DEVICE_CONTROL 0x0e /* device control (write) */ | |
57 | /****************************************************************/ | |
58 | ||
59 | static int bpck6_read_regr(PIA *pi, int cont, int reg) | |
60 | { | |
61 | unsigned int out; | |
62 | ||
63 | /* check for bad settings */ | |
64 | if (reg<0 || reg>7 || cont<0 || cont>2) | |
65 | { | |
66 | return(-1); | |
67 | } | |
68 | out=ppc6_rd_port(PPCSTRUCT(pi),cont?reg|8:reg); | |
69 | return(out); | |
70 | } | |
71 | ||
72 | static void bpck6_write_regr(PIA *pi, int cont, int reg, int val) | |
73 | { | |
74 | /* check for bad settings */ | |
75 | if (reg>=0 && reg<=7 && cont>=0 && cont<=1) | |
76 | { | |
77 | ppc6_wr_port(PPCSTRUCT(pi),cont?reg|8:reg,(u8)val); | |
78 | } | |
79 | } | |
80 | ||
81 | static void bpck6_write_block( PIA *pi, char * buf, int len ) | |
82 | { | |
83 | ppc6_wr_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1); | |
84 | } | |
85 | ||
86 | static void bpck6_read_block( PIA *pi, char * buf, int len ) | |
87 | { | |
88 | ppc6_rd_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1); | |
89 | } | |
90 | ||
91 | static void bpck6_connect ( PIA *pi ) | |
92 | { | |
93 | if(verbose) | |
94 | { | |
95 | printk(KERN_DEBUG "connect\n"); | |
96 | } | |
97 | ||
98 | if(pi->mode >=2) | |
99 | { | |
100 | PPCSTRUCT(pi)->mode=4+pi->mode-2; | |
101 | } | |
102 | else if(pi->mode==1) | |
103 | { | |
104 | PPCSTRUCT(pi)->mode=3; | |
105 | } | |
106 | else | |
107 | { | |
108 | PPCSTRUCT(pi)->mode=1; | |
109 | } | |
110 | ||
111 | ppc6_open(PPCSTRUCT(pi)); | |
112 | ppc6_wr_extout(PPCSTRUCT(pi),0x3); | |
113 | } | |
114 | ||
115 | static void bpck6_disconnect ( PIA *pi ) | |
116 | { | |
117 | if(verbose) | |
118 | { | |
119 | printk("disconnect\n"); | |
120 | } | |
121 | ppc6_wr_extout(PPCSTRUCT(pi),0x0); | |
122 | ppc6_close(PPCSTRUCT(pi)); | |
123 | } | |
124 | ||
125 | static int bpck6_test_port ( PIA *pi ) /* check for 8-bit port */ | |
126 | { | |
127 | if(verbose) | |
128 | { | |
129 | printk(KERN_DEBUG "PARPORT indicates modes=%x for lp=0x%lx\n", | |
130 | ((struct pardevice*)(pi->pardev))->port->modes, | |
131 | ((struct pardevice *)(pi->pardev))->port->base); | |
132 | } | |
133 | ||
134 | /*copy over duplicate stuff.. initialize state info*/ | |
135 | PPCSTRUCT(pi)->ppc_id=pi->unit; | |
136 | PPCSTRUCT(pi)->lpt_addr=pi->port; | |
137 | ||
1da177e4 LT |
138 | /* look at the parport device to see if what modes we can use */ |
139 | if(((struct pardevice *)(pi->pardev))->port->modes & | |
140 | (PARPORT_MODE_EPP) | |
141 | ) | |
142 | { | |
143 | return 5; /* Can do EPP*/ | |
144 | } | |
145 | else if(((struct pardevice *)(pi->pardev))->port->modes & | |
146 | (PARPORT_MODE_TRISTATE) | |
147 | ) | |
148 | { | |
149 | return 2; | |
150 | } | |
151 | else /*Just flat SPP*/ | |
152 | { | |
153 | return 1; | |
154 | } | |
1da177e4 LT |
155 | } |
156 | ||
157 | static int bpck6_probe_unit ( PIA *pi ) | |
158 | { | |
159 | int out; | |
160 | ||
161 | if(verbose) | |
162 | { | |
163 | printk(KERN_DEBUG "PROBE UNIT %x on port:%x\n",pi->unit,pi->port); | |
164 | } | |
165 | ||
166 | /*SET PPC UNIT NUMBER*/ | |
167 | PPCSTRUCT(pi)->ppc_id=pi->unit; | |
168 | ||
169 | /*LOWER DOWN TO UNIDIRECTIONAL*/ | |
170 | PPCSTRUCT(pi)->mode=1; | |
171 | ||
172 | out=ppc6_open(PPCSTRUCT(pi)); | |
173 | ||
174 | if(verbose) | |
175 | { | |
176 | printk(KERN_DEBUG "ppc_open returned %2x\n",out); | |
177 | } | |
178 | ||
179 | if(out) | |
180 | { | |
181 | ppc6_close(PPCSTRUCT(pi)); | |
182 | if(verbose) | |
183 | { | |
184 | printk(KERN_DEBUG "leaving probe\n"); | |
185 | } | |
186 | return(1); | |
187 | } | |
188 | else | |
189 | { | |
190 | if(verbose) | |
191 | { | |
192 | printk(KERN_DEBUG "Failed open\n"); | |
193 | } | |
194 | return(0); | |
195 | } | |
196 | } | |
197 | ||
198 | static void bpck6_log_adapter( PIA *pi, char * scratch, int verbose ) | |
199 | { | |
200 | char *mode_string[5]= | |
201 | {"4-bit","8-bit","EPP-8","EPP-16","EPP-32"}; | |
202 | ||
203 | printk("%s: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n",pi->device); | |
204 | printk("%s: Copyright 2001 by Micro Solutions, Inc., DeKalb IL.\n",pi->device); | |
205 | printk("%s: BACKPACK %s, Micro Solutions BACKPACK Drive at 0x%x\n", | |
206 | pi->device,BACKPACK_VERSION,pi->port); | |
207 | printk("%s: Unit: %d Mode:%d (%s) Delay %d\n",pi->device, | |
208 | pi->unit,pi->mode,mode_string[pi->mode],pi->delay); | |
209 | } | |
210 | ||
211 | static int bpck6_init_proto(PIA *pi) | |
212 | { | |
06ff37ff | 213 | Interface *p = kzalloc(sizeof(Interface), GFP_KERNEL); |
1da177e4 LT |
214 | |
215 | if (p) { | |
1da177e4 LT |
216 | pi->private = (unsigned long)p; |
217 | return 0; | |
218 | } | |
219 | ||
220 | printk(KERN_ERR "%s: ERROR COULDN'T ALLOCATE MEMORY\n", pi->device); | |
221 | return -1; | |
222 | } | |
223 | ||
224 | static void bpck6_release_proto(PIA *pi) | |
225 | { | |
226 | kfree((void *)(pi->private)); | |
227 | } | |
228 | ||
229 | static struct pi_protocol bpck6 = { | |
230 | .owner = THIS_MODULE, | |
231 | .name = "bpck6", | |
232 | .max_mode = 5, | |
233 | .epp_first = 2, /* 2-5 use epp (need 8 ports) */ | |
234 | .max_units = 255, | |
235 | .write_regr = bpck6_write_regr, | |
236 | .read_regr = bpck6_read_regr, | |
237 | .write_block = bpck6_write_block, | |
238 | .read_block = bpck6_read_block, | |
239 | .connect = bpck6_connect, | |
240 | .disconnect = bpck6_disconnect, | |
241 | .test_port = bpck6_test_port, | |
242 | .probe_unit = bpck6_probe_unit, | |
243 | .log_adapter = bpck6_log_adapter, | |
244 | .init_proto = bpck6_init_proto, | |
245 | .release_proto = bpck6_release_proto, | |
246 | }; | |
247 | ||
248 | static int __init bpck6_init(void) | |
249 | { | |
250 | printk(KERN_INFO "bpck6: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n"); | |
251 | printk(KERN_INFO "bpck6: Copyright 2001 by Micro Solutions, Inc., DeKalb IL. USA\n"); | |
252 | if(verbose) | |
253 | printk(KERN_DEBUG "bpck6: verbose debug enabled.\n"); | |
b4178ab5 | 254 | return paride_register(&bpck6); |
1da177e4 LT |
255 | } |
256 | ||
257 | static void __exit bpck6_exit(void) | |
258 | { | |
f4330002 | 259 | paride_unregister(&bpck6); |
1da177e4 LT |
260 | } |
261 | ||
262 | MODULE_LICENSE("GPL"); | |
263 | MODULE_AUTHOR("Micro Solutions Inc."); | |
264 | MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE"); | |
265 | module_param(verbose, bool, 0644); | |
266 | module_init(bpck6_init) | |
267 | module_exit(bpck6_exit) |