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