1 /* 2 * (C) Copyright 2000-2002 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <common.h> 25 #include <watchdog.h> 26 27 #include <mpc8xx.h> 28 #include <commproc.h> 29 30 #if defined(CONFIG_SYS_RTCSC) || defined(CONFIG_SYS_RMDS) 31 DECLARE_GLOBAL_DATA_PTR; 32 #endif 33 34 #if defined(CONFIG_SYS_I2C_UCODE_PATCH) || defined(CONFIG_SYS_SPI_UCODE_PATCH) || \ 35 defined(CONFIG_SYS_SMC_UCODE_PATCH) 36 void cpm_load_patch (volatile immap_t * immr); 37 #endif 38 39 /* 40 * Breath some life into the CPU... 41 * 42 * Set up the memory map, 43 * initialize a bunch of registers, 44 * initialize the UPM's 45 */ 46 void cpu_init_f (volatile immap_t * immr) 47 { 48 #ifndef CONFIG_MBX 49 volatile memctl8xx_t *memctl = &immr->im_memctl; 50 # ifdef CONFIG_SYS_PLPRCR 51 ulong mfmask; 52 # endif 53 #endif 54 ulong reg; 55 56 /* SYPCR - contains watchdog control (11-9) */ 57 58 immr->im_siu_conf.sc_sypcr = CONFIG_SYS_SYPCR; 59 60 #if defined(CONFIG_WATCHDOG) 61 reset_8xx_watchdog (immr); 62 #endif /* CONFIG_WATCHDOG */ 63 64 /* SIUMCR - contains debug pin configuration (11-6) */ 65 #ifndef CONFIG_SVM_SC8xx 66 immr->im_siu_conf.sc_siumcr |= CONFIG_SYS_SIUMCR; 67 #else 68 immr->im_siu_conf.sc_siumcr = CONFIG_SYS_SIUMCR; 69 #endif 70 /* initialize timebase status and control register (11-26) */ 71 /* unlock TBSCRK */ 72 73 immr->im_sitk.sitk_tbscrk = KAPWR_KEY; 74 immr->im_sit.sit_tbscr = CONFIG_SYS_TBSCR; 75 76 /* initialize the PIT (11-31) */ 77 78 immr->im_sitk.sitk_piscrk = KAPWR_KEY; 79 immr->im_sit.sit_piscr = CONFIG_SYS_PISCR; 80 81 /* System integration timers. Don't change EBDF! (15-27) */ 82 83 immr->im_clkrstk.cark_sccrk = KAPWR_KEY; 84 reg = immr->im_clkrst.car_sccr; 85 reg &= SCCR_MASK; 86 reg |= CONFIG_SYS_SCCR; 87 immr->im_clkrst.car_sccr = reg; 88 89 /* PLL (CPU clock) settings (15-30) */ 90 91 immr->im_clkrstk.cark_plprcrk = KAPWR_KEY; 92 93 #ifndef CONFIG_MBX /* MBX board does things different */ 94 95 /* If CONFIG_SYS_PLPRCR (set in the various *_config.h files) tries to 96 * set the MF field, then just copy CONFIG_SYS_PLPRCR over car_plprcr, 97 * otherwise OR in CONFIG_SYS_PLPRCR so we do not change the current MF 98 * field value. 99 * 100 * For newer (starting MPC866) chips PLPRCR layout is different. 101 */ 102 #ifdef CONFIG_SYS_PLPRCR 103 if (get_immr(0xFFFF) >= MPC8xx_NEW_CLK) 104 mfmask = PLPRCR_MFACT_MSK; 105 else 106 mfmask = PLPRCR_MF_MSK; 107 108 if ((CONFIG_SYS_PLPRCR & mfmask) != 0) 109 reg = CONFIG_SYS_PLPRCR; /* reset control bits */ 110 else { 111 reg = immr->im_clkrst.car_plprcr; 112 reg &= mfmask; /* isolate MF-related fields */ 113 reg |= CONFIG_SYS_PLPRCR; /* reset control bits */ 114 } 115 immr->im_clkrst.car_plprcr = reg; 116 #endif 117 118 /* 119 * Memory Controller: 120 */ 121 122 /* perform BR0 reset that MPC850 Rev. A can't guarantee */ 123 reg = memctl->memc_br0; 124 reg &= BR_PS_MSK; /* Clear everything except Port Size bits */ 125 reg |= BR_V; /* then add just the "Bank Valid" bit */ 126 memctl->memc_br0 = reg; 127 128 /* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at 129 * preliminary addresses - these have to be modified later 130 * when FLASH size has been determined 131 * 132 * Depending on the size of the memory region defined by 133 * CONFIG_SYS_OR0_REMAP some boards (wide address mask) allow to map the 134 * CONFIG_SYS_MONITOR_BASE, while others (narrower address mask) can't 135 * map CONFIG_SYS_MONITOR_BASE. 136 * 137 * For example, for CONFIG_IVMS8, the CONFIG_SYS_MONITOR_BASE is 138 * 0xff000000, but CONFIG_SYS_OR0_REMAP's address mask is 0xfff80000. 139 * 140 * If BR0 wasn't loaded with address base 0xff000000, then BR0's 141 * base address remains as 0x00000000. However, the address mask 142 * have been narrowed to 512Kb, so CONFIG_SYS_MONITOR_BASE wasn't mapped 143 * into the Bank0. 144 * 145 * This is why CONFIG_IVMS8 and similar boards must load BR0 with 146 * CONFIG_SYS_BR0_PRELIM in advance. 147 * 148 * [Thanks to Michael Liao for this explanation. 149 * I owe him a free beer. - wd] 150 */ 151 152 #if defined(CONFIG_GTH) || \ 153 defined(CONFIG_HERMES) || \ 154 defined(CONFIG_ICU862) || \ 155 defined(CONFIG_IP860) || \ 156 defined(CONFIG_IVML24) || \ 157 defined(CONFIG_IVMS8) || \ 158 defined(CONFIG_LWMON) || \ 159 defined(CONFIG_MHPC) || \ 160 defined(CONFIG_PCU_E) || \ 161 defined(CONFIG_R360MPI) || \ 162 defined(CONFIG_RMU) || \ 163 defined(CONFIG_RPXCLASSIC) || \ 164 defined(CONFIG_RPXLITE) || \ 165 defined(CONFIG_SPC1920) || \ 166 defined(CONFIG_SPD823TS) 167 168 memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM; 169 #endif 170 171 #if defined(CONFIG_SYS_OR0_REMAP) 172 memctl->memc_or0 = CONFIG_SYS_OR0_REMAP; 173 #endif 174 #if defined(CONFIG_SYS_OR1_REMAP) 175 memctl->memc_or1 = CONFIG_SYS_OR1_REMAP; 176 #endif 177 #if defined(CONFIG_SYS_OR5_REMAP) 178 memctl->memc_or5 = CONFIG_SYS_OR5_REMAP; 179 #endif 180 181 /* now restrict to preliminary range */ 182 memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM; 183 memctl->memc_or0 = CONFIG_SYS_OR0_PRELIM; 184 185 #if (defined(CONFIG_SYS_OR1_PRELIM) && defined(CONFIG_SYS_BR1_PRELIM)) 186 memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM; 187 memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM; 188 #endif 189 190 #if defined(CONFIG_IP860) /* disable CS0 now that Flash is mapped on CS1 */ 191 memctl->memc_br0 = 0; 192 #endif 193 194 #if defined(CONFIG_SYS_OR2_PRELIM) && defined(CONFIG_SYS_BR2_PRELIM) 195 memctl->memc_or2 = CONFIG_SYS_OR2_PRELIM; 196 memctl->memc_br2 = CONFIG_SYS_BR2_PRELIM; 197 #endif 198 199 #if defined(CONFIG_SYS_OR3_PRELIM) && defined(CONFIG_SYS_BR3_PRELIM) 200 memctl->memc_or3 = CONFIG_SYS_OR3_PRELIM; 201 memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM; 202 #endif 203 204 #if defined(CONFIG_SYS_OR4_PRELIM) && defined(CONFIG_SYS_BR4_PRELIM) 205 memctl->memc_or4 = CONFIG_SYS_OR4_PRELIM; 206 memctl->memc_br4 = CONFIG_SYS_BR4_PRELIM; 207 #endif 208 209 #if defined(CONFIG_SYS_OR5_PRELIM) && defined(CONFIG_SYS_BR5_PRELIM) 210 memctl->memc_or5 = CONFIG_SYS_OR5_PRELIM; 211 memctl->memc_br5 = CONFIG_SYS_BR5_PRELIM; 212 #endif 213 214 #if defined(CONFIG_SYS_OR6_PRELIM) && defined(CONFIG_SYS_BR6_PRELIM) 215 memctl->memc_or6 = CONFIG_SYS_OR6_PRELIM; 216 memctl->memc_br6 = CONFIG_SYS_BR6_PRELIM; 217 #endif 218 219 #if defined(CONFIG_SYS_OR7_PRELIM) && defined(CONFIG_SYS_BR7_PRELIM) 220 memctl->memc_or7 = CONFIG_SYS_OR7_PRELIM; 221 memctl->memc_br7 = CONFIG_SYS_BR7_PRELIM; 222 #endif 223 224 #endif /* ! CONFIG_MBX */ 225 226 /* 227 * Reset CPM 228 */ 229 immr->im_cpm.cp_cpcr = CPM_CR_RST | CPM_CR_FLG; 230 do { /* Spin until command processed */ 231 __asm__ ("eieio"); 232 } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG); 233 234 #ifdef CONFIG_MBX 235 /* 236 * on the MBX, things are a little bit different: 237 * - we need to read the VPD to get board information 238 * - the plprcr is set up dynamically 239 * - the memory controller is set up dynamically 240 */ 241 mbx_init (); 242 #endif /* CONFIG_MBX */ 243 244 #ifdef CONFIG_RPXCLASSIC 245 rpxclassic_init (); 246 #endif 247 248 #if defined(CONFIG_RPXLITE) && defined(CONFIG_ENV_IS_IN_NVRAM) 249 rpxlite_init (); 250 #endif 251 252 #ifdef CONFIG_SYS_RCCR /* must be done before cpm_load_patch() */ 253 /* write config value */ 254 immr->im_cpm.cp_rccr = CONFIG_SYS_RCCR; 255 #endif 256 257 #if defined(CONFIG_SYS_I2C_UCODE_PATCH) || defined(CONFIG_SYS_SPI_UCODE_PATCH) || \ 258 defined(CONFIG_SYS_SMC_UCODE_PATCH) 259 cpm_load_patch (immr); /* load mpc8xx microcode patch */ 260 #endif 261 } 262 263 /* 264 * initialize higher level parts of CPU like timers 265 */ 266 int cpu_init_r (void) 267 { 268 #if defined(CONFIG_SYS_RTCSC) || defined(CONFIG_SYS_RMDS) 269 bd_t *bd = gd->bd; 270 volatile immap_t *immr = (volatile immap_t *) (bd->bi_immr_base); 271 #endif 272 273 #ifdef CONFIG_SYS_RTCSC 274 /* Unlock RTSC register */ 275 immr->im_sitk.sitk_rtcsck = KAPWR_KEY; 276 /* write config value */ 277 immr->im_sit.sit_rtcsc = CONFIG_SYS_RTCSC; 278 #endif 279 280 #ifdef CONFIG_SYS_RMDS 281 /* write config value */ 282 immr->im_cpm.cp_rmds = CONFIG_SYS_RMDS; 283 #endif 284 return (0); 285 } 286