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1da177e4 LT |
1 | /* |
2 | * tc-init: We assume the TURBOchannel to be up and running so | |
3 | * just probe for Modules and fill in the global data structure | |
4 | * tc_bus. | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file "COPYING" in the main directory of this archive | |
8 | * for more details. | |
9 | * | |
10 | * Copyright (c) Harald Koerfgen, 1998 | |
11 | * Copyright (c) 2001, 2003 Maciej W. Rozycki | |
12 | */ | |
13 | #include <linux/string.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/ioport.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | ||
19 | #include <asm/addrspace.h> | |
20 | #include <asm/errno.h> | |
21 | #include <asm/dec/machtype.h> | |
22 | #include <asm/dec/prom.h> | |
23 | #include <asm/dec/tcinfo.h> | |
24 | #include <asm/dec/tcmodule.h> | |
25 | #include <asm/dec/interrupts.h> | |
26 | #include <asm/paccess.h> | |
27 | #include <asm/ptrace.h> | |
28 | ||
29 | #define TC_DEBUG | |
30 | ||
31 | MODULE_LICENSE("GPL"); | |
32 | slot_info tc_bus[MAX_SLOT]; | |
33 | static int num_tcslots; | |
34 | static tcinfo *info; | |
35 | ||
36 | unsigned long system_base; | |
37 | ||
38 | /* | |
39 | * Interface to the world. Read comment in include/asm-mips/tc.h. | |
40 | */ | |
41 | ||
42 | int search_tc_card(const char *name) | |
43 | { | |
44 | int slot; | |
45 | slot_info *sip; | |
46 | ||
47 | for (slot = 0; slot < num_tcslots; slot++) { | |
48 | sip = &tc_bus[slot]; | |
49 | if ((sip->flags & FREE) && | |
50 | (strncmp(sip->name, name, strlen(name)) == 0)) { | |
51 | return slot; | |
52 | } | |
53 | } | |
54 | ||
55 | return -ENODEV; | |
56 | } | |
57 | ||
58 | void claim_tc_card(int slot) | |
59 | { | |
60 | if (tc_bus[slot].flags & IN_USE) { | |
61 | printk("claim_tc_card: attempting to claim a card already in use\n"); | |
62 | return; | |
63 | } | |
64 | tc_bus[slot].flags &= ~FREE; | |
65 | tc_bus[slot].flags |= IN_USE; | |
66 | } | |
67 | ||
68 | void release_tc_card(int slot) | |
69 | { | |
70 | if (tc_bus[slot].flags & FREE) { | |
71 | printk("release_tc_card: " | |
72 | "attempting to release a card already free\n"); | |
73 | return; | |
74 | } | |
75 | tc_bus[slot].flags &= ~IN_USE; | |
76 | tc_bus[slot].flags |= FREE; | |
77 | } | |
78 | ||
79 | unsigned long get_tc_base_addr(int slot) | |
80 | { | |
81 | return tc_bus[slot].base_addr; | |
82 | } | |
83 | ||
84 | unsigned long get_tc_irq_nr(int slot) | |
85 | { | |
86 | return tc_bus[slot].interrupt; | |
87 | } | |
88 | ||
89 | unsigned long get_tc_speed(void) | |
90 | { | |
91 | return 100000 * (10000 / (unsigned long)info->clk_period); | |
92 | } | |
93 | ||
94 | /* | |
95 | * Probing for TURBOchannel modules | |
96 | */ | |
97 | static void __init tc_probe(unsigned long startaddr, unsigned long size, | |
98 | int slots) | |
99 | { | |
100 | int i, slot, err; | |
101 | long offset; | |
102 | unsigned char pattern[4]; | |
103 | unsigned char *module; | |
104 | ||
105 | for (slot = 0; slot < slots; slot++) { | |
106 | module = (char *)(startaddr + slot * size); | |
107 | ||
108 | offset = OLDCARD; | |
109 | ||
110 | err = 0; | |
111 | err |= get_dbe(pattern[0], module + OLDCARD + TC_PATTERN0); | |
112 | err |= get_dbe(pattern[1], module + OLDCARD + TC_PATTERN1); | |
113 | err |= get_dbe(pattern[2], module + OLDCARD + TC_PATTERN2); | |
114 | err |= get_dbe(pattern[3], module + OLDCARD + TC_PATTERN3); | |
115 | if (err) | |
116 | continue; | |
117 | ||
118 | if (pattern[0] != 0x55 || pattern[1] != 0x00 || | |
119 | pattern[2] != 0xaa || pattern[3] != 0xff) { | |
120 | offset = NEWCARD; | |
121 | ||
122 | err = 0; | |
123 | err |= get_dbe(pattern[0], module + TC_PATTERN0); | |
124 | err |= get_dbe(pattern[1], module + TC_PATTERN1); | |
125 | err |= get_dbe(pattern[2], module + TC_PATTERN2); | |
126 | err |= get_dbe(pattern[3], module + TC_PATTERN3); | |
127 | if (err) | |
128 | continue; | |
129 | } | |
130 | ||
131 | if (pattern[0] != 0x55 || pattern[1] != 0x00 || | |
132 | pattern[2] != 0xaa || pattern[3] != 0xff) | |
133 | continue; | |
134 | ||
135 | tc_bus[slot].base_addr = (unsigned long)module; | |
136 | for(i = 0; i < 8; i++) { | |
137 | tc_bus[slot].firmware[i] = | |
138 | module[TC_FIRM_VER + offset + 4 * i]; | |
139 | tc_bus[slot].vendor[i] = | |
140 | module[TC_VENDOR + offset + 4 * i]; | |
141 | tc_bus[slot].name[i] = | |
142 | module[TC_MODULE + offset + 4 * i]; | |
143 | } | |
144 | tc_bus[slot].firmware[8] = 0; | |
145 | tc_bus[slot].vendor[8] = 0; | |
146 | tc_bus[slot].name[8] = 0; | |
147 | /* | |
148 | * Looks unneccesary, but we may change | |
149 | * TC? in the future | |
150 | */ | |
151 | switch (slot) { | |
152 | case 0: | |
153 | tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC0]; | |
154 | break; | |
155 | case 1: | |
156 | tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC1]; | |
157 | break; | |
158 | case 2: | |
159 | tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC2]; | |
160 | break; | |
161 | /* | |
162 | * Yuck! DS5000/200 onboard devices | |
163 | */ | |
164 | case 5: | |
165 | tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC5]; | |
166 | break; | |
167 | case 6: | |
168 | tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC6]; | |
169 | break; | |
170 | default: | |
171 | tc_bus[slot].interrupt = -1; | |
172 | break; | |
173 | } | |
174 | } | |
175 | } | |
176 | ||
177 | /* | |
178 | * the main entry | |
179 | */ | |
180 | void __init tc_init(void) | |
181 | { | |
182 | int tc_clock; | |
183 | int i; | |
184 | unsigned long slot0addr; | |
185 | unsigned long slot_size; | |
186 | ||
187 | if (!TURBOCHANNEL) | |
188 | return; | |
189 | ||
190 | for (i = 0; i < MAX_SLOT; i++) { | |
191 | tc_bus[i].base_addr = 0; | |
192 | tc_bus[i].name[0] = 0; | |
193 | tc_bus[i].vendor[0] = 0; | |
194 | tc_bus[i].firmware[0] = 0; | |
195 | tc_bus[i].interrupt = -1; | |
196 | tc_bus[i].flags = FREE; | |
197 | } | |
198 | ||
199 | info = (tcinfo *) rex_gettcinfo(); | |
200 | slot0addr = (unsigned long)KSEG1ADDR(rex_slot_address(0)); | |
201 | ||
202 | switch (mips_machtype) { | |
203 | case MACH_DS5000_200: | |
204 | num_tcslots = 7; | |
205 | break; | |
206 | case MACH_DS5000_1XX: | |
207 | case MACH_DS5000_2X0: | |
208 | case MACH_DS5900: | |
209 | num_tcslots = 3; | |
210 | break; | |
211 | case MACH_DS5000_XX: | |
212 | default: | |
213 | num_tcslots = 2; | |
214 | break; | |
215 | } | |
216 | ||
217 | tc_clock = 10000 / info->clk_period; | |
218 | ||
219 | if (TURBOCHANNEL && info->slot_size && slot0addr) { | |
220 | printk("TURBOchannel rev. %1d at %2d.%1d MHz ", info->revision, | |
221 | tc_clock / 10, tc_clock % 10); | |
222 | printk("(with%s parity)\n", info->parity ? "" : "out"); | |
223 | ||
224 | slot_size = info->slot_size << 20; | |
225 | ||
226 | tc_probe(slot0addr, slot_size, num_tcslots); | |
227 | ||
228 | /* | |
229 | * All TURBOchannel DECstations have the onboard devices | |
230 | * where the (num_tcslots + 0 or 1 on DS5k/xx) Option Module | |
231 | * would be. | |
232 | */ | |
233 | if(mips_machtype == MACH_DS5000_XX) | |
234 | i = 1; | |
235 | else | |
236 | i = 0; | |
237 | ||
238 | system_base = slot0addr + slot_size * (num_tcslots + i); | |
239 | ||
240 | #ifdef TC_DEBUG | |
241 | for (i = 0; i < num_tcslots; i++) | |
242 | if (tc_bus[i].base_addr) { | |
243 | printk(" slot %d: ", i); | |
244 | printk("%s %s %s\n", tc_bus[i].vendor, | |
245 | tc_bus[i].name, tc_bus[i].firmware); | |
246 | } | |
247 | #endif | |
248 | ioport_resource.end = KSEG2 - 1; | |
249 | } | |
250 | } | |
251 | ||
252 | subsys_initcall(tc_init); | |
253 | ||
254 | EXPORT_SYMBOL(search_tc_card); | |
255 | EXPORT_SYMBOL(claim_tc_card); | |
256 | EXPORT_SYMBOL(release_tc_card); | |
257 | EXPORT_SYMBOL(get_tc_base_addr); | |
258 | EXPORT_SYMBOL(get_tc_irq_nr); | |
259 | EXPORT_SYMBOL(get_tc_speed); | |
260 | EXPORT_SYMBOL(system_base); |