11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * tc-init: We assume the TURBOchannel to be up and running so 31da177e4SLinus Torvalds * just probe for Modules and fill in the global data structure 41da177e4SLinus Torvalds * tc_bus. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This file is subject to the terms and conditions of the GNU General Public 71da177e4SLinus Torvalds * License. See the file "COPYING" in the main directory of this archive 81da177e4SLinus Torvalds * for more details. 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * Copyright (c) Harald Koerfgen, 1998 11778220f7SMaciej W. Rozycki * Copyright (c) 2001, 2003, 2005 Maciej W. Rozycki 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds #include <linux/string.h> 141da177e4SLinus Torvalds #include <linux/init.h> 151da177e4SLinus Torvalds #include <linux/ioport.h> 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/module.h> 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds #include <asm/addrspace.h> 201da177e4SLinus Torvalds #include <asm/errno.h> 211da177e4SLinus Torvalds #include <asm/dec/machtype.h> 221da177e4SLinus Torvalds #include <asm/dec/prom.h> 231da177e4SLinus Torvalds #include <asm/dec/tcinfo.h> 241da177e4SLinus Torvalds #include <asm/dec/tcmodule.h> 251da177e4SLinus Torvalds #include <asm/dec/interrupts.h> 261da177e4SLinus Torvalds #include <asm/paccess.h> 271da177e4SLinus Torvalds #include <asm/ptrace.h> 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds #define TC_DEBUG 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 321da177e4SLinus Torvalds slot_info tc_bus[MAX_SLOT]; 331da177e4SLinus Torvalds static int num_tcslots; 341da177e4SLinus Torvalds static tcinfo *info; 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds unsigned long system_base; 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds /* 391da177e4SLinus Torvalds * Interface to the world. Read comment in include/asm-mips/tc.h. 401da177e4SLinus Torvalds */ 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds int search_tc_card(const char *name) 431da177e4SLinus Torvalds { 441da177e4SLinus Torvalds int slot; 451da177e4SLinus Torvalds slot_info *sip; 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds for (slot = 0; slot < num_tcslots; slot++) { 481da177e4SLinus Torvalds sip = &tc_bus[slot]; 491da177e4SLinus Torvalds if ((sip->flags & FREE) && 501da177e4SLinus Torvalds (strncmp(sip->name, name, strlen(name)) == 0)) { 511da177e4SLinus Torvalds return slot; 521da177e4SLinus Torvalds } 531da177e4SLinus Torvalds } 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds return -ENODEV; 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds void claim_tc_card(int slot) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds if (tc_bus[slot].flags & IN_USE) { 611da177e4SLinus Torvalds printk("claim_tc_card: attempting to claim a card already in use\n"); 621da177e4SLinus Torvalds return; 631da177e4SLinus Torvalds } 641da177e4SLinus Torvalds tc_bus[slot].flags &= ~FREE; 651da177e4SLinus Torvalds tc_bus[slot].flags |= IN_USE; 661da177e4SLinus Torvalds } 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds void release_tc_card(int slot) 691da177e4SLinus Torvalds { 701da177e4SLinus Torvalds if (tc_bus[slot].flags & FREE) { 711da177e4SLinus Torvalds printk("release_tc_card: " 721da177e4SLinus Torvalds "attempting to release a card already free\n"); 731da177e4SLinus Torvalds return; 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds tc_bus[slot].flags &= ~IN_USE; 761da177e4SLinus Torvalds tc_bus[slot].flags |= FREE; 771da177e4SLinus Torvalds } 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds unsigned long get_tc_base_addr(int slot) 801da177e4SLinus Torvalds { 811da177e4SLinus Torvalds return tc_bus[slot].base_addr; 821da177e4SLinus Torvalds } 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds unsigned long get_tc_irq_nr(int slot) 851da177e4SLinus Torvalds { 861da177e4SLinus Torvalds return tc_bus[slot].interrupt; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds unsigned long get_tc_speed(void) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds return 100000 * (10000 / (unsigned long)info->clk_period); 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds /* 951da177e4SLinus Torvalds * Probing for TURBOchannel modules 961da177e4SLinus Torvalds */ 971da177e4SLinus Torvalds static void __init tc_probe(unsigned long startaddr, unsigned long size, 981da177e4SLinus Torvalds int slots) 991da177e4SLinus Torvalds { 1001da177e4SLinus Torvalds int i, slot, err; 1011da177e4SLinus Torvalds long offset; 1021da177e4SLinus Torvalds unsigned char pattern[4]; 1031da177e4SLinus Torvalds unsigned char *module; 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds for (slot = 0; slot < slots; slot++) { 1061da177e4SLinus Torvalds module = (char *)(startaddr + slot * size); 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds offset = OLDCARD; 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds err = 0; 1111da177e4SLinus Torvalds err |= get_dbe(pattern[0], module + OLDCARD + TC_PATTERN0); 1121da177e4SLinus Torvalds err |= get_dbe(pattern[1], module + OLDCARD + TC_PATTERN1); 1131da177e4SLinus Torvalds err |= get_dbe(pattern[2], module + OLDCARD + TC_PATTERN2); 1141da177e4SLinus Torvalds err |= get_dbe(pattern[3], module + OLDCARD + TC_PATTERN3); 1151da177e4SLinus Torvalds if (err) 1161da177e4SLinus Torvalds continue; 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds if (pattern[0] != 0x55 || pattern[1] != 0x00 || 1191da177e4SLinus Torvalds pattern[2] != 0xaa || pattern[3] != 0xff) { 1201da177e4SLinus Torvalds offset = NEWCARD; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds err = 0; 1231da177e4SLinus Torvalds err |= get_dbe(pattern[0], module + TC_PATTERN0); 1241da177e4SLinus Torvalds err |= get_dbe(pattern[1], module + TC_PATTERN1); 1251da177e4SLinus Torvalds err |= get_dbe(pattern[2], module + TC_PATTERN2); 1261da177e4SLinus Torvalds err |= get_dbe(pattern[3], module + TC_PATTERN3); 1271da177e4SLinus Torvalds if (err) 1281da177e4SLinus Torvalds continue; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds if (pattern[0] != 0x55 || pattern[1] != 0x00 || 1321da177e4SLinus Torvalds pattern[2] != 0xaa || pattern[3] != 0xff) 1331da177e4SLinus Torvalds continue; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds tc_bus[slot].base_addr = (unsigned long)module; 1361da177e4SLinus Torvalds for(i = 0; i < 8; i++) { 1371da177e4SLinus Torvalds tc_bus[slot].firmware[i] = 1381da177e4SLinus Torvalds module[TC_FIRM_VER + offset + 4 * i]; 1391da177e4SLinus Torvalds tc_bus[slot].vendor[i] = 1401da177e4SLinus Torvalds module[TC_VENDOR + offset + 4 * i]; 1411da177e4SLinus Torvalds tc_bus[slot].name[i] = 1421da177e4SLinus Torvalds module[TC_MODULE + offset + 4 * i]; 1431da177e4SLinus Torvalds } 1441da177e4SLinus Torvalds tc_bus[slot].firmware[8] = 0; 1451da177e4SLinus Torvalds tc_bus[slot].vendor[8] = 0; 1461da177e4SLinus Torvalds tc_bus[slot].name[8] = 0; 1471da177e4SLinus Torvalds /* 1481da177e4SLinus Torvalds * Looks unneccesary, but we may change 1491da177e4SLinus Torvalds * TC? in the future 1501da177e4SLinus Torvalds */ 1511da177e4SLinus Torvalds switch (slot) { 1521da177e4SLinus Torvalds case 0: 1531da177e4SLinus Torvalds tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC0]; 1541da177e4SLinus Torvalds break; 1551da177e4SLinus Torvalds case 1: 1561da177e4SLinus Torvalds tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC1]; 1571da177e4SLinus Torvalds break; 1581da177e4SLinus Torvalds case 2: 1591da177e4SLinus Torvalds tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC2]; 1601da177e4SLinus Torvalds break; 1611da177e4SLinus Torvalds /* 1621da177e4SLinus Torvalds * Yuck! DS5000/200 onboard devices 1631da177e4SLinus Torvalds */ 1641da177e4SLinus Torvalds case 5: 1651da177e4SLinus Torvalds tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC5]; 1661da177e4SLinus Torvalds break; 1671da177e4SLinus Torvalds case 6: 1681da177e4SLinus Torvalds tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC6]; 1691da177e4SLinus Torvalds break; 1701da177e4SLinus Torvalds default: 1711da177e4SLinus Torvalds tc_bus[slot].interrupt = -1; 1721da177e4SLinus Torvalds break; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds /* 1781da177e4SLinus Torvalds * the main entry 1791da177e4SLinus Torvalds */ 180778220f7SMaciej W. Rozycki static int __init tc_init(void) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds int tc_clock; 1831da177e4SLinus Torvalds int i; 1841da177e4SLinus Torvalds unsigned long slot0addr; 1851da177e4SLinus Torvalds unsigned long slot_size; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds if (!TURBOCHANNEL) 188778220f7SMaciej W. Rozycki return 0; 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds for (i = 0; i < MAX_SLOT; i++) { 1911da177e4SLinus Torvalds tc_bus[i].base_addr = 0; 1921da177e4SLinus Torvalds tc_bus[i].name[0] = 0; 1931da177e4SLinus Torvalds tc_bus[i].vendor[0] = 0; 1941da177e4SLinus Torvalds tc_bus[i].firmware[0] = 0; 1951da177e4SLinus Torvalds tc_bus[i].interrupt = -1; 1961da177e4SLinus Torvalds tc_bus[i].flags = FREE; 1971da177e4SLinus Torvalds } 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds info = (tcinfo *) rex_gettcinfo(); 2003bd4c902SMaciej W. Rozycki slot0addr = (unsigned long)CKSEG1ADDR(rex_slot_address(0)); 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds switch (mips_machtype) { 2031da177e4SLinus Torvalds case MACH_DS5000_200: 2041da177e4SLinus Torvalds num_tcslots = 7; 2051da177e4SLinus Torvalds break; 2061da177e4SLinus Torvalds case MACH_DS5000_1XX: 2071da177e4SLinus Torvalds case MACH_DS5000_2X0: 2081da177e4SLinus Torvalds case MACH_DS5900: 2091da177e4SLinus Torvalds num_tcslots = 3; 2101da177e4SLinus Torvalds break; 2111da177e4SLinus Torvalds case MACH_DS5000_XX: 2121da177e4SLinus Torvalds default: 2131da177e4SLinus Torvalds num_tcslots = 2; 2141da177e4SLinus Torvalds break; 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds tc_clock = 10000 / info->clk_period; 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds if (TURBOCHANNEL && info->slot_size && slot0addr) { 2201da177e4SLinus Torvalds printk("TURBOchannel rev. %1d at %2d.%1d MHz ", info->revision, 2211da177e4SLinus Torvalds tc_clock / 10, tc_clock % 10); 2221da177e4SLinus Torvalds printk("(with%s parity)\n", info->parity ? "" : "out"); 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds slot_size = info->slot_size << 20; 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds tc_probe(slot0addr, slot_size, num_tcslots); 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds /* 2291da177e4SLinus Torvalds * All TURBOchannel DECstations have the onboard devices 2301da177e4SLinus Torvalds * where the (num_tcslots + 0 or 1 on DS5k/xx) Option Module 2311da177e4SLinus Torvalds * would be. 2321da177e4SLinus Torvalds */ 2331da177e4SLinus Torvalds if(mips_machtype == MACH_DS5000_XX) 2341da177e4SLinus Torvalds i = 1; 2351da177e4SLinus Torvalds else 2361da177e4SLinus Torvalds i = 0; 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds system_base = slot0addr + slot_size * (num_tcslots + i); 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds #ifdef TC_DEBUG 2411da177e4SLinus Torvalds for (i = 0; i < num_tcslots; i++) 2421da177e4SLinus Torvalds if (tc_bus[i].base_addr) { 2431da177e4SLinus Torvalds printk(" slot %d: ", i); 2441da177e4SLinus Torvalds printk("%s %s %s\n", tc_bus[i].vendor, 2451da177e4SLinus Torvalds tc_bus[i].name, tc_bus[i].firmware); 2461da177e4SLinus Torvalds } 2471da177e4SLinus Torvalds #endif 2481da177e4SLinus Torvalds } 249778220f7SMaciej W. Rozycki 250778220f7SMaciej W. Rozycki return 0; 2511da177e4SLinus Torvalds } 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds subsys_initcall(tc_init); 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds EXPORT_SYMBOL(search_tc_card); 2561da177e4SLinus Torvalds EXPORT_SYMBOL(claim_tc_card); 2571da177e4SLinus Torvalds EXPORT_SYMBOL(release_tc_card); 2581da177e4SLinus Torvalds EXPORT_SYMBOL(get_tc_base_addr); 2591da177e4SLinus Torvalds EXPORT_SYMBOL(get_tc_irq_nr); 2601da177e4SLinus Torvalds EXPORT_SYMBOL(get_tc_speed); 2611da177e4SLinus Torvalds EXPORT_SYMBOL(system_base); 262