1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * arch/m68k/q40/config.c 4 * 5 * Copyright (C) 1999 Richard Zidlicky 6 * 7 * originally based on: 8 * 9 * linux/bvme/config.c 10 */ 11 12 #include <linux/errno.h> 13 #include <linux/types.h> 14 #include <linux/kernel.h> 15 #include <linux/mm.h> 16 #include <linux/tty.h> 17 #include <linux/console.h> 18 #include <linux/linkage.h> 19 #include <linux/init.h> 20 #include <linux/major.h> 21 #include <linux/serial_reg.h> 22 #include <linux/rtc.h> 23 #include <linux/vt_kern.h> 24 #include <linux/bcd.h> 25 #include <linux/platform_device.h> 26 27 #include <asm/io.h> 28 #include <asm/bootinfo.h> 29 #include <asm/setup.h> 30 #include <asm/irq.h> 31 #include <asm/traps.h> 32 #include <asm/machdep.h> 33 #include <asm/q40_master.h> 34 #include <asm/config.h> 35 36 #include "q40.h" 37 38 static void q40_get_model(char *model); 39 40 static int q40_hwclk(int, struct rtc_time *); 41 static int q40_get_rtc_pll(struct rtc_pll_info *pll); 42 static int q40_set_rtc_pll(struct rtc_pll_info *pll); 43 44 static void q40_mem_console_write(struct console *co, const char *b, 45 unsigned int count); 46 47 extern int ql_ticks; 48 49 static struct console q40_console_driver = { 50 .name = "debug", 51 .write = q40_mem_console_write, 52 .flags = CON_PRINTBUFFER, 53 .index = -1, 54 }; 55 56 57 /* early debugging function:*/ 58 extern char *q40_mem_cptr; /*=(char *)0xff020000;*/ 59 static int _cpleft; 60 61 static void q40_mem_console_write(struct console *co, const char *s, 62 unsigned int count) 63 { 64 const char *p = s; 65 66 if (count < _cpleft) { 67 while (count-- > 0) { 68 *q40_mem_cptr = *p++; 69 q40_mem_cptr += 4; 70 _cpleft--; 71 } 72 } 73 } 74 75 static int __init q40_debug_setup(char *arg) 76 { 77 /* useful for early debugging stages - writes kernel messages into SRAM */ 78 if (MACH_IS_Q40 && !strncmp(arg, "mem", 3)) { 79 /*pr_info("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/ 80 _cpleft = 2000 - ((long)q40_mem_cptr-0xff020000) / 4; 81 register_console(&q40_console_driver); 82 } 83 return 0; 84 } 85 86 early_param("debug", q40_debug_setup); 87 88 #if 0 89 void printq40(char *str) 90 { 91 int l = strlen(str); 92 char *p = q40_mem_cptr; 93 94 while (l-- > 0 && _cpleft-- > 0) { 95 *p = *str++; 96 p += 4; 97 } 98 q40_mem_cptr = p; 99 } 100 #endif 101 102 static int halted; 103 104 #ifdef CONFIG_HEARTBEAT 105 static void q40_heartbeat(int on) 106 { 107 if (halted) 108 return; 109 110 if (on) 111 Q40_LED_ON(); 112 else 113 Q40_LED_OFF(); 114 } 115 #endif 116 117 static void q40_reset(void) 118 { 119 halted = 1; 120 pr_info("*******************************************\n" 121 "Called q40_reset : press the RESET button!!\n" 122 "*******************************************\n"); 123 Q40_LED_ON(); 124 while (1) 125 ; 126 } 127 128 static void q40_halt(void) 129 { 130 halted = 1; 131 pr_info("*******************\n" 132 " Called q40_halt\n" 133 "*******************\n"); 134 Q40_LED_ON(); 135 while (1) 136 ; 137 } 138 139 static void q40_get_model(char *model) 140 { 141 sprintf(model, "Q40"); 142 } 143 144 static unsigned int serports[] = 145 { 146 0x3f8,0x2f8,0x3e8,0x2e8,0 147 }; 148 149 static void __init q40_disable_irqs(void) 150 { 151 unsigned i, j; 152 153 j = 0; 154 while ((i = serports[j++])) 155 outb(0, i + UART_IER); 156 master_outb(0, EXT_ENABLE_REG); 157 master_outb(0, KEY_IRQ_ENABLE_REG); 158 } 159 160 void __init config_q40(void) 161 { 162 mach_sched_init = q40_sched_init; 163 164 mach_init_IRQ = q40_init_IRQ; 165 mach_hwclk = q40_hwclk; 166 mach_get_rtc_pll = q40_get_rtc_pll; 167 mach_set_rtc_pll = q40_set_rtc_pll; 168 169 mach_reset = q40_reset; 170 mach_get_model = q40_get_model; 171 172 #if IS_ENABLED(CONFIG_INPUT_M68K_BEEP) 173 mach_beep = q40_mksound; 174 #endif 175 #ifdef CONFIG_HEARTBEAT 176 mach_heartbeat = q40_heartbeat; 177 #endif 178 mach_halt = q40_halt; 179 180 /* disable a few things that SMSQ might have left enabled */ 181 q40_disable_irqs(); 182 } 183 184 185 int __init q40_parse_bootinfo(const struct bi_record *rec) 186 { 187 return 1; 188 } 189 190 /* 191 * Looks like op is non-zero for setting the clock, and zero for 192 * reading the clock. 193 * 194 * struct hwclk_time { 195 * unsigned sec; 0..59 196 * unsigned min; 0..59 197 * unsigned hour; 0..23 198 * unsigned day; 1..31 199 * unsigned mon; 0..11 200 * unsigned year; 00... 201 * int wday; 0..6, 0 is Sunday, -1 means unknown/don't set 202 * }; 203 */ 204 205 static int q40_hwclk(int op, struct rtc_time *t) 206 { 207 if (op) { 208 /* Write.... */ 209 Q40_RTC_CTRL |= Q40_RTC_WRITE; 210 211 Q40_RTC_SECS = bin2bcd(t->tm_sec); 212 Q40_RTC_MINS = bin2bcd(t->tm_min); 213 Q40_RTC_HOUR = bin2bcd(t->tm_hour); 214 Q40_RTC_DATE = bin2bcd(t->tm_mday); 215 Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1); 216 Q40_RTC_YEAR = bin2bcd(t->tm_year%100); 217 if (t->tm_wday >= 0) 218 Q40_RTC_DOW = bin2bcd(t->tm_wday+1); 219 220 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE); 221 } else { 222 /* Read.... */ 223 Q40_RTC_CTRL |= Q40_RTC_READ; 224 225 t->tm_year = bcd2bin (Q40_RTC_YEAR); 226 t->tm_mon = bcd2bin (Q40_RTC_MNTH)-1; 227 t->tm_mday = bcd2bin (Q40_RTC_DATE); 228 t->tm_hour = bcd2bin (Q40_RTC_HOUR); 229 t->tm_min = bcd2bin (Q40_RTC_MINS); 230 t->tm_sec = bcd2bin (Q40_RTC_SECS); 231 232 Q40_RTC_CTRL &= ~(Q40_RTC_READ); 233 234 if (t->tm_year < 70) 235 t->tm_year += 100; 236 t->tm_wday = bcd2bin(Q40_RTC_DOW)-1; 237 } 238 239 return 0; 240 } 241 242 /* get and set PLL calibration of RTC clock */ 243 #define Q40_RTC_PLL_MASK ((1<<5)-1) 244 #define Q40_RTC_PLL_SIGN (1<<5) 245 246 static int q40_get_rtc_pll(struct rtc_pll_info *pll) 247 { 248 int tmp = Q40_RTC_CTRL; 249 250 pll->pll_ctrl = 0; 251 pll->pll_value = tmp & Q40_RTC_PLL_MASK; 252 if (tmp & Q40_RTC_PLL_SIGN) 253 pll->pll_value = -pll->pll_value; 254 pll->pll_max = 31; 255 pll->pll_min = -31; 256 pll->pll_posmult = 512; 257 pll->pll_negmult = 256; 258 pll->pll_clock = 125829120; 259 260 return 0; 261 } 262 263 static int q40_set_rtc_pll(struct rtc_pll_info *pll) 264 { 265 if (!pll->pll_ctrl) { 266 /* the docs are a bit unclear so I am doublesetting */ 267 /* RTC_WRITE here ... */ 268 int tmp = (pll->pll_value & 31) | (pll->pll_value<0 ? 32 : 0) | 269 Q40_RTC_WRITE; 270 Q40_RTC_CTRL |= Q40_RTC_WRITE; 271 Q40_RTC_CTRL = tmp; 272 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE); 273 return 0; 274 } else 275 return -EINVAL; 276 } 277 278 #define PCIDE_BASE1 0x1f0 279 #define PCIDE_BASE2 0x170 280 #define PCIDE_CTL 0x206 281 282 static const struct resource q40_pata_rsrc_0[] __initconst = { 283 DEFINE_RES_MEM(q40_isa_io_base + PCIDE_BASE1 * 4, 0x38), 284 DEFINE_RES_MEM(q40_isa_io_base + (PCIDE_BASE1 + PCIDE_CTL) * 4, 2), 285 DEFINE_RES_IO(PCIDE_BASE1, 8), 286 DEFINE_RES_IO(PCIDE_BASE1 + PCIDE_CTL, 1), 287 DEFINE_RES_IRQ(14), 288 }; 289 290 static const struct resource q40_pata_rsrc_1[] __initconst = { 291 DEFINE_RES_MEM(q40_isa_io_base + PCIDE_BASE2 * 4, 0x38), 292 DEFINE_RES_MEM(q40_isa_io_base + (PCIDE_BASE2 + PCIDE_CTL) * 4, 2), 293 DEFINE_RES_IO(PCIDE_BASE2, 8), 294 DEFINE_RES_IO(PCIDE_BASE2 + PCIDE_CTL, 1), 295 DEFINE_RES_IRQ(15), 296 }; 297 298 static __init int q40_platform_init(void) 299 { 300 if (!MACH_IS_Q40) 301 return -ENODEV; 302 303 platform_device_register_simple("q40kbd", -1, NULL, 0); 304 305 platform_device_register_simple("atari-falcon-ide", 0, q40_pata_rsrc_0, 306 ARRAY_SIZE(q40_pata_rsrc_0)); 307 308 platform_device_register_simple("atari-falcon-ide", 1, q40_pata_rsrc_1, 309 ARRAY_SIZE(q40_pata_rsrc_1)); 310 311 return 0; 312 } 313 arch_initcall(q40_platform_init); 314