Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |