Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | static void mvme16x_get_model(char *model); |
| 44 | static int mvme16x_get_hardware_list(char *buffer); |
David Howells | 40220c1 | 2006-10-09 12:19:47 +0100 | [diff] [blame] | 45 | extern void mvme16x_sched_init(irq_handler_t handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
David Howells | 40220c1 | 2006-10-09 12:19:47 +0100 | [diff] [blame] | 57 | static irq_handler_t tick_handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Roman Zippel | 200a3d3 | 2006-06-25 05:47:06 -0700 | [diff] [blame] | 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 | |
Al Viro | 66a3f82 | 2007-07-20 04:33:28 +0100 | [diff] [blame] | 122 | static void __init mvme16x_init_IRQ (void) |
Roman Zippel | 200a3d3 | 2006-06-25 05:47:06 -0700 | [diff] [blame] | 123 | { |
| 124 | m68k_setup_user_interrupt(VEC_USER, 192, NULL); |
| 125 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Al Viro | 2850bc2 | 2006-10-07 14:16:45 +0100 | [diff] [blame] | 193 | static irqreturn_t mvme16x_abort_int (int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Al Viro | 2850bc2 | 2006-10-07 14:16:45 +0100 | [diff] [blame] | 221 | static irqreturn_t mvme16x_timer_int (int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | { |
| 223 | *(volatile unsigned char *)0xfff4201b |= 8; |
Al Viro | 2850bc2 | 2006-10-07 14:16:45 +0100 | [diff] [blame] | 224 | return tick_handler(irq, dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | |
David Howells | 40220c1 | 2006-10-09 12:19:47 +0100 | [diff] [blame] | 227 | void mvme16x_sched_init (irq_handler_t timer_routine) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |