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 extern irqreturn_t mvme16x_process_int (int level, struct pt_regs *regs); 44 extern void mvme16x_init_IRQ (void); 45 extern void mvme16x_free_irq (unsigned int, void *); 46 extern int show_mvme16x_interrupts (struct seq_file *, void *); 47 extern void mvme16x_enable_irq (unsigned int); 48 extern void mvme16x_disable_irq (unsigned int); 49 static void mvme16x_get_model(char *model); 50 static int mvme16x_get_hardware_list(char *buffer); 51 extern int mvme16x_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id); 52 extern void mvme16x_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)); 53 extern unsigned long mvme16x_gettimeoffset (void); 54 extern int mvme16x_hwclk (int, struct rtc_time *); 55 extern int mvme16x_set_clock_mmss (unsigned long); 56 extern void mvme16x_reset (void); 57 extern void mvme16x_waitbut(void); 58 59 int bcd2int (unsigned char b); 60 61 /* Save tick handler routine pointer, will point to do_timer() in 62 * kernel/sched.c, called via mvme16x_process_int() */ 63 64 static irqreturn_t (*tick_handler)(int, void *, struct pt_regs *); 65 66 67 unsigned short mvme16x_config; 68 69 70 int mvme16x_parse_bootinfo(const struct bi_record *bi) 71 { 72 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO) 73 return 0; 74 else 75 return 1; 76 } 77 78 void mvme16x_reset(void) 79 { 80 printk ("\r\n\nCalled mvme16x_reset\r\n" 81 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r"); 82 /* The string of returns is to delay the reset until the whole 83 * message is output. Assert reset bit in GCSR */ 84 *(volatile char *)0xfff40107 = 0x80; 85 } 86 87 static void mvme16x_get_model(char *model) 88 { 89 p_bdid p = &mvme_bdid; 90 char suf[4]; 91 92 suf[1] = p->brdsuffix[0]; 93 suf[2] = p->brdsuffix[1]; 94 suf[3] = '\0'; 95 suf[0] = suf[1] ? '-' : '\0'; 96 97 sprintf(model, "Motorola MVME%x%s", p->brdno, suf); 98 } 99 100 101 static int mvme16x_get_hardware_list(char *buffer) 102 { 103 p_bdid p = &mvme_bdid; 104 int len = 0; 105 106 if (p->brdno == 0x0162 || p->brdno == 0x0172) 107 { 108 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 109 110 len += sprintf (buffer+len, "VMEchip2 %spresent\n", 111 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 112 len += sprintf (buffer+len, "SCSI interface %spresent\n", 113 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 114 len += sprintf (buffer+len, "Ethernet i/f %spresent\n", 115 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 116 } 117 else 118 *buffer = '\0'; 119 120 return (len); 121 } 122 123 124 #define pcc2chip ((volatile u_char *)0xfff42000) 125 #define PccSCCMICR 0x1d 126 #define PccSCCTICR 0x1e 127 #define PccSCCRICR 0x1f 128 129 void __init config_mvme16x(void) 130 { 131 p_bdid p = &mvme_bdid; 132 char id[40]; 133 134 mach_max_dma_address = 0xffffffff; 135 mach_sched_init = mvme16x_sched_init; 136 mach_init_IRQ = mvme16x_init_IRQ; 137 mach_gettimeoffset = mvme16x_gettimeoffset; 138 mach_hwclk = mvme16x_hwclk; 139 mach_set_clock_mmss = mvme16x_set_clock_mmss; 140 mach_reset = mvme16x_reset; 141 mach_free_irq = mvme16x_free_irq; 142 mach_process_int = mvme16x_process_int; 143 mach_get_irq_list = show_mvme16x_interrupts; 144 mach_request_irq = mvme16x_request_irq; 145 enable_irq = mvme16x_enable_irq; 146 disable_irq = mvme16x_disable_irq; 147 mach_get_model = mvme16x_get_model; 148 mach_get_hardware_list = mvme16x_get_hardware_list; 149 150 /* Report board revision */ 151 152 if (strncmp("BDID", p->bdid, 4)) 153 { 154 printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n"); 155 while (1) 156 ; 157 } 158 /* Board type is only set by newer versions of vmelilo/tftplilo */ 159 if (vme_brdtype == 0) 160 vme_brdtype = p->brdno; 161 162 mvme16x_get_model(id); 163 printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4, 164 p->rev&0xf, p->yr, p->mth, p->day); 165 if (p->brdno == 0x0162 || p->brdno == 0x172) 166 { 167 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 168 169 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA; 170 171 printk ("MVME%x Hardware status:\n", p->brdno); 172 printk (" CPU Type 68%s040\n", 173 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC"); 174 printk (" CPU clock %dMHz\n", 175 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25); 176 printk (" VMEchip2 %spresent\n", 177 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 178 printk (" SCSI interface %spresent\n", 179 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 180 printk (" Ethernet interface %spresent\n", 181 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 182 } 183 else 184 { 185 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401; 186 187 /* Dont allow any interrupts from the CD2401 until the interrupt */ 188 /* handlers are installed */ 189 190 pcc2chip[PccSCCMICR] = 0x10; 191 pcc2chip[PccSCCTICR] = 0x10; 192 pcc2chip[PccSCCRICR] = 0x10; 193 } 194 } 195 196 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id, struct pt_regs *fp) 197 { 198 p_bdid p = &mvme_bdid; 199 unsigned long *new = (unsigned long *)vectors; 200 unsigned long *old = (unsigned long *)0xffe00000; 201 volatile unsigned char uc, *ucp; 202 203 if (p->brdno == 0x0162 || p->brdno == 0x172) 204 { 205 ucp = (volatile unsigned char *)0xfff42043; 206 uc = *ucp | 8; 207 *ucp = uc; 208 } 209 else 210 { 211 *(volatile unsigned long *)0xfff40074 = 0x40000000; 212 } 213 *(new+4) = *(old+4); /* Illegal instruction */ 214 *(new+9) = *(old+9); /* Trace */ 215 *(new+47) = *(old+47); /* Trap #15 */ 216 217 if (p->brdno == 0x0162 || p->brdno == 0x172) 218 *(new+0x5e) = *(old+0x5e); /* ABORT switch */ 219 else 220 *(new+0x6e) = *(old+0x6e); /* ABORT switch */ 221 return IRQ_HANDLED; 222 } 223 224 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id, struct pt_regs *fp) 225 { 226 *(volatile unsigned char *)0xfff4201b |= 8; 227 return tick_handler(irq, dev_id, fp); 228 } 229 230 void mvme16x_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *)) 231 { 232 p_bdid p = &mvme_bdid; 233 int irq; 234 235 tick_handler = timer_routine; 236 /* Using PCCchip2 or MC2 chip tick timer 1 */ 237 *(volatile unsigned long *)0xfff42008 = 0; 238 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */ 239 *(volatile unsigned char *)0xfff42017 |= 3; 240 *(volatile unsigned char *)0xfff4201b = 0x16; 241 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0, 242 "timer", mvme16x_timer_int)) 243 panic ("Couldn't register timer int"); 244 245 if (p->brdno == 0x0162 || p->brdno == 0x172) 246 irq = MVME162_IRQ_ABORT; 247 else 248 irq = MVME167_IRQ_ABORT; 249 if (request_irq(irq, mvme16x_abort_int, 0, 250 "abort", mvme16x_abort_int)) 251 panic ("Couldn't register abort int"); 252 } 253 254 255 /* This is always executed with interrupts disabled. */ 256 unsigned long mvme16x_gettimeoffset (void) 257 { 258 return (*(volatile unsigned long *)0xfff42008); 259 } 260 261 int bcd2int (unsigned char b) 262 { 263 return ((b>>4)*10 + (b&15)); 264 } 265 266 int mvme16x_hwclk(int op, struct rtc_time *t) 267 { 268 #warning check me! 269 if (!op) { 270 rtc->ctrl = RTC_READ; 271 t->tm_year = bcd2int (rtc->bcd_year); 272 t->tm_mon = bcd2int (rtc->bcd_mth); 273 t->tm_mday = bcd2int (rtc->bcd_dom); 274 t->tm_hour = bcd2int (rtc->bcd_hr); 275 t->tm_min = bcd2int (rtc->bcd_min); 276 t->tm_sec = bcd2int (rtc->bcd_sec); 277 rtc->ctrl = 0; 278 } 279 return 0; 280 } 281 282 int mvme16x_set_clock_mmss (unsigned long nowtime) 283 { 284 return 0; 285 } 286 287