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 #include <linux/module.h> 29 30 #include <asm/bootinfo.h> 31 #include <asm/system.h> 32 #include <asm/pgtable.h> 33 #include <asm/setup.h> 34 #include <asm/irq.h> 35 #include <asm/traps.h> 36 #include <asm/rtc.h> 37 #include <asm/machdep.h> 38 #include <asm/mvme16xhw.h> 39 40 extern t_bdid mvme_bdid; 41 42 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE; 43 44 static void mvme16x_get_model(char *model); 45 static int mvme16x_get_hardware_list(char *buffer); 46 extern void mvme16x_sched_init(irq_handler_t handler); 47 extern unsigned long mvme16x_gettimeoffset (void); 48 extern int mvme16x_hwclk (int, struct rtc_time *); 49 extern int mvme16x_set_clock_mmss (unsigned long); 50 extern void mvme16x_reset (void); 51 extern void mvme16x_waitbut(void); 52 53 int bcd2int (unsigned char b); 54 55 /* Save tick handler routine pointer, will point to do_timer() in 56 * kernel/sched.c, called via mvme16x_process_int() */ 57 58 static irq_handler_t tick_handler; 59 60 61 unsigned short mvme16x_config; 62 EXPORT_SYMBOL(mvme16x_config); 63 64 65 int mvme16x_parse_bootinfo(const struct bi_record *bi) 66 { 67 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO) 68 return 0; 69 else 70 return 1; 71 } 72 73 void mvme16x_reset(void) 74 { 75 printk ("\r\n\nCalled mvme16x_reset\r\n" 76 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r"); 77 /* The string of returns is to delay the reset until the whole 78 * message is output. Assert reset bit in GCSR */ 79 *(volatile char *)0xfff40107 = 0x80; 80 } 81 82 static void mvme16x_get_model(char *model) 83 { 84 p_bdid p = &mvme_bdid; 85 char suf[4]; 86 87 suf[1] = p->brdsuffix[0]; 88 suf[2] = p->brdsuffix[1]; 89 suf[3] = '\0'; 90 suf[0] = suf[1] ? '-' : '\0'; 91 92 sprintf(model, "Motorola MVME%x%s", p->brdno, suf); 93 } 94 95 96 static int mvme16x_get_hardware_list(char *buffer) 97 { 98 p_bdid p = &mvme_bdid; 99 int len = 0; 100 101 if (p->brdno == 0x0162 || p->brdno == 0x0172) 102 { 103 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 104 105 len += sprintf (buffer+len, "VMEchip2 %spresent\n", 106 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 107 len += sprintf (buffer+len, "SCSI interface %spresent\n", 108 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 109 len += sprintf (buffer+len, "Ethernet i/f %spresent\n", 110 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 111 } 112 else 113 *buffer = '\0'; 114 115 return (len); 116 } 117 118 /* 119 * This function is called during kernel startup to initialize 120 * the mvme16x IRQ handling routines. Should probably ensure 121 * that the base vectors for the VMEChip2 and PCCChip2 are valid. 122 */ 123 124 static void __init mvme16x_init_IRQ (void) 125 { 126 m68k_setup_user_interrupt(VEC_USER, 192, NULL); 127 } 128 129 #define pcc2chip ((volatile u_char *)0xfff42000) 130 #define PccSCCMICR 0x1d 131 #define PccSCCTICR 0x1e 132 #define PccSCCRICR 0x1f 133 134 void __init config_mvme16x(void) 135 { 136 p_bdid p = &mvme_bdid; 137 char id[40]; 138 139 mach_max_dma_address = 0xffffffff; 140 mach_sched_init = mvme16x_sched_init; 141 mach_init_IRQ = mvme16x_init_IRQ; 142 mach_gettimeoffset = mvme16x_gettimeoffset; 143 mach_hwclk = mvme16x_hwclk; 144 mach_set_clock_mmss = mvme16x_set_clock_mmss; 145 mach_reset = mvme16x_reset; 146 mach_get_model = mvme16x_get_model; 147 mach_get_hardware_list = mvme16x_get_hardware_list; 148 149 /* Report board revision */ 150 151 if (strncmp("BDID", p->bdid, 4)) 152 { 153 printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n"); 154 while (1) 155 ; 156 } 157 /* Board type is only set by newer versions of vmelilo/tftplilo */ 158 if (vme_brdtype == 0) 159 vme_brdtype = p->brdno; 160 161 mvme16x_get_model(id); 162 printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4, 163 p->rev&0xf, p->yr, p->mth, p->day); 164 if (p->brdno == 0x0162 || p->brdno == 0x172) 165 { 166 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 167 168 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA; 169 170 printk ("MVME%x Hardware status:\n", p->brdno); 171 printk (" CPU Type 68%s040\n", 172 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC"); 173 printk (" CPU clock %dMHz\n", 174 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25); 175 printk (" VMEchip2 %spresent\n", 176 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 177 printk (" SCSI interface %spresent\n", 178 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 179 printk (" Ethernet interface %spresent\n", 180 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 181 } 182 else 183 { 184 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401; 185 186 /* Dont allow any interrupts from the CD2401 until the interrupt */ 187 /* handlers are installed */ 188 189 pcc2chip[PccSCCMICR] = 0x10; 190 pcc2chip[PccSCCTICR] = 0x10; 191 pcc2chip[PccSCCRICR] = 0x10; 192 } 193 } 194 195 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id) 196 { 197 p_bdid p = &mvme_bdid; 198 unsigned long *new = (unsigned long *)vectors; 199 unsigned long *old = (unsigned long *)0xffe00000; 200 volatile unsigned char uc, *ucp; 201 202 if (p->brdno == 0x0162 || p->brdno == 0x172) 203 { 204 ucp = (volatile unsigned char *)0xfff42043; 205 uc = *ucp | 8; 206 *ucp = uc; 207 } 208 else 209 { 210 *(volatile unsigned long *)0xfff40074 = 0x40000000; 211 } 212 *(new+4) = *(old+4); /* Illegal instruction */ 213 *(new+9) = *(old+9); /* Trace */ 214 *(new+47) = *(old+47); /* Trap #15 */ 215 216 if (p->brdno == 0x0162 || p->brdno == 0x172) 217 *(new+0x5e) = *(old+0x5e); /* ABORT switch */ 218 else 219 *(new+0x6e) = *(old+0x6e); /* ABORT switch */ 220 return IRQ_HANDLED; 221 } 222 223 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id) 224 { 225 *(volatile unsigned char *)0xfff4201b |= 8; 226 return tick_handler(irq, dev_id); 227 } 228 229 void mvme16x_sched_init (irq_handler_t timer_routine) 230 { 231 p_bdid p = &mvme_bdid; 232 int irq; 233 234 tick_handler = timer_routine; 235 /* Using PCCchip2 or MC2 chip tick timer 1 */ 236 *(volatile unsigned long *)0xfff42008 = 0; 237 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */ 238 *(volatile unsigned char *)0xfff42017 |= 3; 239 *(volatile unsigned char *)0xfff4201b = 0x16; 240 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0, 241 "timer", mvme16x_timer_int)) 242 panic ("Couldn't register timer int"); 243 244 if (p->brdno == 0x0162 || p->brdno == 0x172) 245 irq = MVME162_IRQ_ABORT; 246 else 247 irq = MVME167_IRQ_ABORT; 248 if (request_irq(irq, mvme16x_abort_int, 0, 249 "abort", mvme16x_abort_int)) 250 panic ("Couldn't register abort int"); 251 } 252 253 254 /* This is always executed with interrupts disabled. */ 255 unsigned long mvme16x_gettimeoffset (void) 256 { 257 return (*(volatile unsigned long *)0xfff42008); 258 } 259 260 int bcd2int (unsigned char b) 261 { 262 return ((b>>4)*10 + (b&15)); 263 } 264 265 int mvme16x_hwclk(int op, struct rtc_time *t) 266 { 267 #warning check me! 268 if (!op) { 269 rtc->ctrl = RTC_READ; 270 t->tm_year = bcd2int (rtc->bcd_year); 271 t->tm_mon = bcd2int (rtc->bcd_mth); 272 t->tm_mday = bcd2int (rtc->bcd_dom); 273 t->tm_hour = bcd2int (rtc->bcd_hr); 274 t->tm_min = bcd2int (rtc->bcd_min); 275 t->tm_sec = bcd2int (rtc->bcd_sec); 276 rtc->ctrl = 0; 277 } 278 return 0; 279 } 280 281 int mvme16x_set_clock_mmss (unsigned long nowtime) 282 { 283 return 0; 284 } 285 286