1 /* 2 * arch/m68k/q40/config.c 3 * 4 * Copyright (C) 1999 Richard Zidlicky 5 * 6 * originally based on: 7 * 8 * linux/bvme/config.c 9 * 10 * This file is subject to the terms and conditions of the GNU General Public 11 * License. See the file README.legal in the main directory of this archive 12 * for more details. 13 */ 14 15 #include <linux/errno.h> 16 #include <linux/types.h> 17 #include <linux/kernel.h> 18 #include <linux/mm.h> 19 #include <linux/tty.h> 20 #include <linux/console.h> 21 #include <linux/linkage.h> 22 #include <linux/init.h> 23 #include <linux/major.h> 24 #include <linux/serial_reg.h> 25 #include <linux/rtc.h> 26 #include <linux/vt_kern.h> 27 #include <linux/bcd.h> 28 #include <linux/platform_device.h> 29 30 #include <asm/io.h> 31 #include <asm/bootinfo.h> 32 #include <asm/pgtable.h> 33 #include <asm/setup.h> 34 #include <asm/irq.h> 35 #include <asm/traps.h> 36 #include <asm/machdep.h> 37 #include <asm/q40_master.h> 38 39 extern void q40_init_IRQ(void); 40 static void q40_get_model(char *model); 41 extern void q40_sched_init(irq_handler_t handler); 42 43 static u32 q40_gettimeoffset(void); 44 static int q40_hwclk(int, struct rtc_time *); 45 static unsigned int q40_get_ss(void); 46 static int q40_set_clock_mmss(unsigned long); 47 static int q40_get_rtc_pll(struct rtc_pll_info *pll); 48 static int q40_set_rtc_pll(struct rtc_pll_info *pll); 49 50 extern void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/); 51 52 static void q40_mem_console_write(struct console *co, const char *b, 53 unsigned int count); 54 55 extern int ql_ticks; 56 57 static struct console q40_console_driver = { 58 .name = "debug", 59 .write = q40_mem_console_write, 60 .flags = CON_PRINTBUFFER, 61 .index = -1, 62 }; 63 64 65 /* early debugging function:*/ 66 extern char *q40_mem_cptr; /*=(char *)0xff020000;*/ 67 static int _cpleft; 68 69 static void q40_mem_console_write(struct console *co, const char *s, 70 unsigned int count) 71 { 72 const char *p = s; 73 74 if (count < _cpleft) { 75 while (count-- > 0) { 76 *q40_mem_cptr = *p++; 77 q40_mem_cptr += 4; 78 _cpleft--; 79 } 80 } 81 } 82 83 static int __init q40_debug_setup(char *arg) 84 { 85 /* useful for early debugging stages - writes kernel messages into SRAM */ 86 if (MACH_IS_Q40 && !strncmp(arg, "mem", 3)) { 87 /*pr_info("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/ 88 _cpleft = 2000 - ((long)q40_mem_cptr-0xff020000) / 4; 89 register_console(&q40_console_driver); 90 } 91 return 0; 92 } 93 94 early_param("debug", q40_debug_setup); 95 96 #if 0 97 void printq40(char *str) 98 { 99 int l = strlen(str); 100 char *p = q40_mem_cptr; 101 102 while (l-- > 0 && _cpleft-- > 0) { 103 *p = *str++; 104 p += 4; 105 } 106 q40_mem_cptr = p; 107 } 108 #endif 109 110 static int halted; 111 112 #ifdef CONFIG_HEARTBEAT 113 static void q40_heartbeat(int on) 114 { 115 if (halted) 116 return; 117 118 if (on) 119 Q40_LED_ON(); 120 else 121 Q40_LED_OFF(); 122 } 123 #endif 124 125 static void q40_reset(void) 126 { 127 halted = 1; 128 pr_info("*******************************************\n" 129 "Called q40_reset : press the RESET button!!\n" 130 "*******************************************\n"); 131 Q40_LED_ON(); 132 while (1) 133 ; 134 } 135 136 static void q40_halt(void) 137 { 138 halted = 1; 139 pr_info("*******************\n" 140 " Called q40_halt\n" 141 "*******************\n"); 142 Q40_LED_ON(); 143 while (1) 144 ; 145 } 146 147 static void q40_get_model(char *model) 148 { 149 sprintf(model, "Q40"); 150 } 151 152 static unsigned int serports[] = 153 { 154 0x3f8,0x2f8,0x3e8,0x2e8,0 155 }; 156 157 static void __init q40_disable_irqs(void) 158 { 159 unsigned i, j; 160 161 j = 0; 162 while ((i = serports[j++])) 163 outb(0, i + UART_IER); 164 master_outb(0, EXT_ENABLE_REG); 165 master_outb(0, KEY_IRQ_ENABLE_REG); 166 } 167 168 void __init config_q40(void) 169 { 170 mach_sched_init = q40_sched_init; 171 172 mach_init_IRQ = q40_init_IRQ; 173 arch_gettimeoffset = q40_gettimeoffset; 174 mach_hwclk = q40_hwclk; 175 mach_get_ss = q40_get_ss; 176 mach_get_rtc_pll = q40_get_rtc_pll; 177 mach_set_rtc_pll = q40_set_rtc_pll; 178 mach_set_clock_mmss = q40_set_clock_mmss; 179 180 mach_reset = q40_reset; 181 mach_get_model = q40_get_model; 182 183 #if IS_ENABLED(CONFIG_INPUT_M68K_BEEP) 184 mach_beep = q40_mksound; 185 #endif 186 #ifdef CONFIG_HEARTBEAT 187 mach_heartbeat = q40_heartbeat; 188 #endif 189 mach_halt = q40_halt; 190 191 /* disable a few things that SMSQ might have left enabled */ 192 q40_disable_irqs(); 193 194 /* no DMA at all, but ide-scsi requires it.. make sure 195 * all physical RAM fits into the boundary - otherwise 196 * allocator may play costly and useless tricks */ 197 mach_max_dma_address = 1024*1024*1024; 198 } 199 200 201 int __init q40_parse_bootinfo(const struct bi_record *rec) 202 { 203 return 1; 204 } 205 206 207 static u32 q40_gettimeoffset(void) 208 { 209 return 5000 * (ql_ticks != 0) * 1000; 210 } 211 212 213 /* 214 * Looks like op is non-zero for setting the clock, and zero for 215 * reading the clock. 216 * 217 * struct hwclk_time { 218 * unsigned sec; 0..59 219 * unsigned min; 0..59 220 * unsigned hour; 0..23 221 * unsigned day; 1..31 222 * unsigned mon; 0..11 223 * unsigned year; 00... 224 * int wday; 0..6, 0 is Sunday, -1 means unknown/don't set 225 * }; 226 */ 227 228 static int q40_hwclk(int op, struct rtc_time *t) 229 { 230 if (op) { 231 /* Write.... */ 232 Q40_RTC_CTRL |= Q40_RTC_WRITE; 233 234 Q40_RTC_SECS = bin2bcd(t->tm_sec); 235 Q40_RTC_MINS = bin2bcd(t->tm_min); 236 Q40_RTC_HOUR = bin2bcd(t->tm_hour); 237 Q40_RTC_DATE = bin2bcd(t->tm_mday); 238 Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1); 239 Q40_RTC_YEAR = bin2bcd(t->tm_year%100); 240 if (t->tm_wday >= 0) 241 Q40_RTC_DOW = bin2bcd(t->tm_wday+1); 242 243 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE); 244 } else { 245 /* Read.... */ 246 Q40_RTC_CTRL |= Q40_RTC_READ; 247 248 t->tm_year = bcd2bin (Q40_RTC_YEAR); 249 t->tm_mon = bcd2bin (Q40_RTC_MNTH)-1; 250 t->tm_mday = bcd2bin (Q40_RTC_DATE); 251 t->tm_hour = bcd2bin (Q40_RTC_HOUR); 252 t->tm_min = bcd2bin (Q40_RTC_MINS); 253 t->tm_sec = bcd2bin (Q40_RTC_SECS); 254 255 Q40_RTC_CTRL &= ~(Q40_RTC_READ); 256 257 if (t->tm_year < 70) 258 t->tm_year += 100; 259 t->tm_wday = bcd2bin(Q40_RTC_DOW)-1; 260 } 261 262 return 0; 263 } 264 265 static unsigned int q40_get_ss(void) 266 { 267 return bcd2bin(Q40_RTC_SECS); 268 } 269 270 /* 271 * Set the minutes and seconds from seconds value 'nowtime'. Fail if 272 * clock is out by > 30 minutes. Logic lifted from atari code. 273 */ 274 275 static int q40_set_clock_mmss(unsigned long nowtime) 276 { 277 int retval = 0; 278 short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60; 279 280 int rtc_minutes; 281 282 rtc_minutes = bcd2bin(Q40_RTC_MINS); 283 284 if ((rtc_minutes < real_minutes ? 285 real_minutes - rtc_minutes : 286 rtc_minutes - real_minutes) < 30) { 287 Q40_RTC_CTRL |= Q40_RTC_WRITE; 288 Q40_RTC_MINS = bin2bcd(real_minutes); 289 Q40_RTC_SECS = bin2bcd(real_seconds); 290 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE); 291 } else 292 retval = -1; 293 294 return retval; 295 } 296 297 298 /* get and set PLL calibration of RTC clock */ 299 #define Q40_RTC_PLL_MASK ((1<<5)-1) 300 #define Q40_RTC_PLL_SIGN (1<<5) 301 302 static int q40_get_rtc_pll(struct rtc_pll_info *pll) 303 { 304 int tmp = Q40_RTC_CTRL; 305 306 pll->pll_value = tmp & Q40_RTC_PLL_MASK; 307 if (tmp & Q40_RTC_PLL_SIGN) 308 pll->pll_value = -pll->pll_value; 309 pll->pll_max = 31; 310 pll->pll_min = -31; 311 pll->pll_posmult = 512; 312 pll->pll_negmult = 256; 313 pll->pll_clock = 125829120; 314 315 return 0; 316 } 317 318 static int q40_set_rtc_pll(struct rtc_pll_info *pll) 319 { 320 if (!pll->pll_ctrl) { 321 /* the docs are a bit unclear so I am doublesetting */ 322 /* RTC_WRITE here ... */ 323 int tmp = (pll->pll_value & 31) | (pll->pll_value<0 ? 32 : 0) | 324 Q40_RTC_WRITE; 325 Q40_RTC_CTRL |= Q40_RTC_WRITE; 326 Q40_RTC_CTRL = tmp; 327 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE); 328 return 0; 329 } else 330 return -EINVAL; 331 } 332 333 static __init int q40_add_kbd_device(void) 334 { 335 struct platform_device *pdev; 336 337 if (!MACH_IS_Q40) 338 return -ENODEV; 339 340 pdev = platform_device_register_simple("q40kbd", -1, NULL, 0); 341 return PTR_ERR_OR_ZERO(pdev); 342 } 343 arch_initcall(q40_add_kbd_device); 344