1 /* 2 * arch/m68k/mvme16x/config.c 3 * 4 * Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk] 5 * 6 * Based on: 7 * 8 * linux/amiga/config.c 9 * 10 * Copyright (C) 1993 Hamish Macdonald 11 * 12 * This file is subject to the terms and conditions of the GNU General Public 13 * License. See the file README.legal in the main directory of this archive 14 * for more details. 15 */ 16 17 #include <linux/types.h> 18 #include <linux/kernel.h> 19 #include <linux/mm.h> 20 #include <linux/tty.h> 21 #include <linux/console.h> 22 #include <linux/linkage.h> 23 #include <linux/init.h> 24 #include <linux/major.h> 25 #include <linux/genhd.h> 26 #include <linux/rtc.h> 27 #include <linux/interrupt.h> 28 29 #include <asm/bootinfo.h> 30 #include <asm/system.h> 31 #include <asm/pgtable.h> 32 #include <asm/setup.h> 33 #include <asm/irq.h> 34 #include <asm/traps.h> 35 #include <asm/rtc.h> 36 #include <asm/machdep.h> 37 #include <asm/mvme16xhw.h> 38 39 extern t_bdid mvme_bdid; 40 41 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE; 42 43 static void mvme16x_get_model(char *model); 44 static int mvme16x_get_hardware_list(char *buffer); 45 extern void mvme16x_sched_init(irq_handler_t handler); 46 extern unsigned long mvme16x_gettimeoffset (void); 47 extern int mvme16x_hwclk (int, struct rtc_time *); 48 extern int mvme16x_set_clock_mmss (unsigned long); 49 extern void mvme16x_reset (void); 50 extern void mvme16x_waitbut(void); 51 52 int bcd2int (unsigned char b); 53 54 /* Save tick handler routine pointer, will point to do_timer() in 55 * kernel/sched.c, called via mvme16x_process_int() */ 56 57 static irq_handler_t tick_handler; 58 59 60 unsigned short mvme16x_config; 61 62 63 int mvme16x_parse_bootinfo(const struct bi_record *bi) 64 { 65 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO) 66 return 0; 67 else 68 return 1; 69 } 70 71 void mvme16x_reset(void) 72 { 73 printk ("\r\n\nCalled mvme16x_reset\r\n" 74 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r"); 75 /* The string of returns is to delay the reset until the whole 76 * message is output. Assert reset bit in GCSR */ 77 *(volatile char *)0xfff40107 = 0x80; 78 } 79 80 static void mvme16x_get_model(char *model) 81 { 82 p_bdid p = &mvme_bdid; 83 char suf[4]; 84 85 suf[1] = p->brdsuffix[0]; 86 suf[2] = p->brdsuffix[1]; 87 suf[3] = '\0'; 88 suf[0] = suf[1] ? '-' : '\0'; 89 90 sprintf(model, "Motorola MVME%x%s", p->brdno, suf); 91 } 92 93 94 static int mvme16x_get_hardware_list(char *buffer) 95 { 96 p_bdid p = &mvme_bdid; 97 int len = 0; 98 99 if (p->brdno == 0x0162 || p->brdno == 0x0172) 100 { 101 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 102 103 len += sprintf (buffer+len, "VMEchip2 %spresent\n", 104 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 105 len += sprintf (buffer+len, "SCSI interface %spresent\n", 106 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 107 len += sprintf (buffer+len, "Ethernet i/f %spresent\n", 108 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 109 } 110 else 111 *buffer = '\0'; 112 113 return (len); 114 } 115 116 /* 117 * This function is called during kernel startup to initialize 118 * the mvme16x IRQ handling routines. Should probably ensure 119 * that the base vectors for the VMEChip2 and PCCChip2 are valid. 120 */ 121 122 static void mvme16x_init_IRQ (void) 123 { 124 m68k_setup_user_interrupt(VEC_USER, 192, NULL); 125 } 126 127 #define pcc2chip ((volatile u_char *)0xfff42000) 128 #define PccSCCMICR 0x1d 129 #define PccSCCTICR 0x1e 130 #define PccSCCRICR 0x1f 131 132 void __init config_mvme16x(void) 133 { 134 p_bdid p = &mvme_bdid; 135 char id[40]; 136 137 mach_max_dma_address = 0xffffffff; 138 mach_sched_init = mvme16x_sched_init; 139 mach_init_IRQ = mvme16x_init_IRQ; 140 mach_gettimeoffset = mvme16x_gettimeoffset; 141 mach_hwclk = mvme16x_hwclk; 142 mach_set_clock_mmss = mvme16x_set_clock_mmss; 143 mach_reset = mvme16x_reset; 144 mach_get_model = mvme16x_get_model; 145 mach_get_hardware_list = mvme16x_get_hardware_list; 146 147 /* Report board revision */ 148 149 if (strncmp("BDID", p->bdid, 4)) 150 { 151 printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n"); 152 while (1) 153 ; 154 } 155 /* Board type is only set by newer versions of vmelilo/tftplilo */ 156 if (vme_brdtype == 0) 157 vme_brdtype = p->brdno; 158 159 mvme16x_get_model(id); 160 printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4, 161 p->rev&0xf, p->yr, p->mth, p->day); 162 if (p->brdno == 0x0162 || p->brdno == 0x172) 163 { 164 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 165 166 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA; 167 168 printk ("MVME%x Hardware status:\n", p->brdno); 169 printk (" CPU Type 68%s040\n", 170 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC"); 171 printk (" CPU clock %dMHz\n", 172 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25); 173 printk (" VMEchip2 %spresent\n", 174 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 175 printk (" SCSI interface %spresent\n", 176 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 177 printk (" Ethernet interface %spresent\n", 178 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 179 } 180 else 181 { 182 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401; 183 184 /* Dont allow any interrupts from the CD2401 until the interrupt */ 185 /* handlers are installed */ 186 187 pcc2chip[PccSCCMICR] = 0x10; 188 pcc2chip[PccSCCTICR] = 0x10; 189 pcc2chip[PccSCCRICR] = 0x10; 190 } 191 } 192 193 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id) 194 { 195 p_bdid p = &mvme_bdid; 196 unsigned long *new = (unsigned long *)vectors; 197 unsigned long *old = (unsigned long *)0xffe00000; 198 volatile unsigned char uc, *ucp; 199 200 if (p->brdno == 0x0162 || p->brdno == 0x172) 201 { 202 ucp = (volatile unsigned char *)0xfff42043; 203 uc = *ucp | 8; 204 *ucp = uc; 205 } 206 else 207 { 208 *(volatile unsigned long *)0xfff40074 = 0x40000000; 209 } 210 *(new+4) = *(old+4); /* Illegal instruction */ 211 *(new+9) = *(old+9); /* Trace */ 212 *(new+47) = *(old+47); /* Trap #15 */ 213 214 if (p->brdno == 0x0162 || p->brdno == 0x172) 215 *(new+0x5e) = *(old+0x5e); /* ABORT switch */ 216 else 217 *(new+0x6e) = *(old+0x6e); /* ABORT switch */ 218 return IRQ_HANDLED; 219 } 220 221 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id) 222 { 223 *(volatile unsigned char *)0xfff4201b |= 8; 224 return tick_handler(irq, dev_id); 225 } 226 227 void mvme16x_sched_init (irq_handler_t timer_routine) 228 { 229 p_bdid p = &mvme_bdid; 230 int irq; 231 232 tick_handler = timer_routine; 233 /* Using PCCchip2 or MC2 chip tick timer 1 */ 234 *(volatile unsigned long *)0xfff42008 = 0; 235 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */ 236 *(volatile unsigned char *)0xfff42017 |= 3; 237 *(volatile unsigned char *)0xfff4201b = 0x16; 238 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0, 239 "timer", mvme16x_timer_int)) 240 panic ("Couldn't register timer int"); 241 242 if (p->brdno == 0x0162 || p->brdno == 0x172) 243 irq = MVME162_IRQ_ABORT; 244 else 245 irq = MVME167_IRQ_ABORT; 246 if (request_irq(irq, mvme16x_abort_int, 0, 247 "abort", mvme16x_abort_int)) 248 panic ("Couldn't register abort int"); 249 } 250 251 252 /* This is always executed with interrupts disabled. */ 253 unsigned long mvme16x_gettimeoffset (void) 254 { 255 return (*(volatile unsigned long *)0xfff42008); 256 } 257 258 int bcd2int (unsigned char b) 259 { 260 return ((b>>4)*10 + (b&15)); 261 } 262 263 int mvme16x_hwclk(int op, struct rtc_time *t) 264 { 265 #warning check me! 266 if (!op) { 267 rtc->ctrl = RTC_READ; 268 t->tm_year = bcd2int (rtc->bcd_year); 269 t->tm_mon = bcd2int (rtc->bcd_mth); 270 t->tm_mday = bcd2int (rtc->bcd_dom); 271 t->tm_hour = bcd2int (rtc->bcd_hr); 272 t->tm_min = bcd2int (rtc->bcd_min); 273 t->tm_sec = bcd2int (rtc->bcd_sec); 274 rtc->ctrl = 0; 275 } 276 return 0; 277 } 278 279 int mvme16x_set_clock_mmss (unsigned long nowtime) 280 { 281 return 0; 282 } 283 284