cpu/mcf52x2/cpu.c

   1 /*
   2  * (C) Copyright 2003
   3  * Josef Baumgartner <josef.baumgartner@telex.de>
   4  *
   5  * MCF5282 additionals
   6  * (C) Copyright 2005
   7  * BuS Elektronik GmbH & Co. KG <esw@bus-elektronik.de>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 #include <common.h>
  29 #include <watchdog.h>
  30 #include <command.h>
  31
  32 #ifdef  CONFIG_M5271
  33 #include <asm/immap_5271.h>
  34 #include <asm/m5271.h>
  35 #endif
  36
  37 #ifdef  CONFIG_M5272
  38 #include <asm/immap_5272.h>
  39 #include <asm/m5272.h>
  40 #endif
  41
  42 #ifdef  CONFIG_M5282
  43 #include <asm/m5282.h>
  44 #include <asm/immap_5282.h>
  45 #endif
  46
  47 #ifdef  CONFIG_M5249
  48 #include <asm/m5249.h>
  49 #endif
  50
  51 #ifdef  CONFIG_M5271
  52 int checkcpu (void)
  53 {
  54         char buf[32];
  55
  56         printf ("CPU:   Freescale Coldfire MCF5271 at %s MHz\n", strmhz(buf, CFG_CLK));
  57         return 0;
  58 }
  59
  60 int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[]) {
  61         mbar_writeByte(MCF_RCM_RCR,
  62                         MCF_RCM_RCR_SOFTRST | MCF_RCM_RCR_FRCRSTOUT);
  63         return 0;
  64 };
  65
  66 #if defined(CONFIG_WATCHDOG)
  67 void watchdog_reset (void)
  68 {
  69         mbar_writeShort(MCF_WTM_WSR, 0x5555);
  70         mbar_writeShort(MCF_WTM_WSR, 0xAAAA);
  71 }
  72
  73 int watchdog_disable (void)
  74 {
  75         mbar_writeShort(MCF_WTM_WCR, 0);
  76         return (0);
  77 }
  78
  79 int watchdog_init (void)
  80 {
  81         mbar_writeShort(MCF_WTM_WCR, MCF_WTM_WCR_EN);
  82         return (0);
  83 }
  84 #endif /* #ifdef CONFIG_WATCHDOG */
  85
  86 #endif
  87
  88 #ifdef  CONFIG_M5272
  89 int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[]) {
  90         volatile wdog_t * wdp = (wdog_t *)(CFG_MBAR + MCFSIM_WRRR);
  91
  92         wdp->wdog_wrrr = 0;
  93         udelay (1000);
  94
  95         /* enable watchdog, set timeout to 0 and wait */
  96         wdp->wdog_wrrr = 1;
  97         while (1);
  98
  99         /* we don't return! */
 100         return 0;
 101 };
 102
 103 int checkcpu(void) {
 104         ulong *dirp = (ulong *)(CFG_MBAR + MCFSIM_DIR);
 105         uchar msk;
 106         char  *suf;
 107
 108         puts ("CPU:   ");
 109         msk = (*dirp > 28) & 0xf;
 110         switch (msk) {
 111                 case 0x2: suf = "1K75N"; break;
 112                 case 0x4: suf = "3K75N"; break;
 113                 default:
 114                         suf = NULL;
 115                         printf ("Freescale MCF5272 (Mask:%01x)\n", msk);
 116                         break;
 117                 }
 118
 119         if (suf)
 120                 printf ("Freescale MCF5272 %s\n", suf);
 121         return 0;
 122 };
 123
 124 #if defined(CONFIG_WATCHDOG)
 125 /* Called by macro WATCHDOG_RESET */
 126 void watchdog_reset (void)
 127 {
 128         volatile immap_t * regp = (volatile immap_t *)CFG_MBAR;
 129         regp->wdog_reg.wdog_wcr = 0;
 130 }
 131
 132 int watchdog_disable (void)
 133 {
 134         volatile immap_t *regp = (volatile immap_t *)CFG_MBAR;
 135
 136         regp->wdog_reg.wdog_wcr = 0;    /* reset watchdog counter */
 137         regp->wdog_reg.wdog_wirr = 0;   /* disable watchdog interrupt */
 138         regp->wdog_reg.wdog_wrrr = 0;   /* disable watchdog timer */
 139
 140         puts ("WATCHDOG:disabled\n");
 141         return (0);
 142 }
 143
 144 int watchdog_init (void)
 145 {
 146         volatile immap_t *regp = (volatile immap_t *)CFG_MBAR;
 147
 148         regp->wdog_reg.wdog_wirr = 0;   /* disable watchdog interrupt */
 149
 150         /* set timeout and enable watchdog */
 151         regp->wdog_reg.wdog_wrrr = ((CONFIG_WATCHDOG_TIMEOUT * CFG_HZ) / (32768 * 1000)) - 1;
 152         regp->wdog_reg.wdog_wcr = 0;    /* reset watchdog counter */
 153
 154         puts ("WATCHDOG:enabled\n");
 155         return (0);
 156 }
 157 #endif /* #ifdef CONFIG_WATCHDOG */
 158
 159 #endif /* #ifdef CONFIG_M5272 */
 160
 161
 162 #ifdef  CONFIG_M5282
 163 int checkcpu (void)
 164 {
 165         unsigned char resetsource = MCFRESET_RSR;
 166
 167         printf ("CPU:   Freescale Coldfire MCF5282 (PIN: %2.2x REV: %2.2x)\n",
 168                 MCFCCM_CIR>>8,MCFCCM_CIR & MCFCCM_CIR_PRN_MASK);
 169         printf ("Reset:%s%s%s%s%s%s%s\n",
 170                 (resetsource & MCFRESET_RSR_LOL)  ? " Loss of Lock"     : "",
 171                 (resetsource & MCFRESET_RSR_LOC)  ? " Loss of Clock"    : "",
 172                 (resetsource & MCFRESET_RSR_EXT)  ? " External"         : "",
 173                 (resetsource & MCFRESET_RSR_POR)  ? " Power On"         : "",
 174                 (resetsource & MCFRESET_RSR_WDR)  ? " Watchdog"         : "",
 175                 (resetsource & MCFRESET_RSR_SOFT) ? " Software"         : "",
 176                 (resetsource & MCFRESET_RSR_LVD)  ? " Low Voltage"      : ""
 177         );
 178         return 0;
 179 }
 180
 181 int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
 182 {
 183         MCFRESET_RCR = MCFRESET_RCR_SOFTRST;
 184         return 0;
 185 };
 186 #endif
 187
 188 #ifdef CONFIG_M5249 /* test-only: todo... */
 189 int checkcpu (void)
 190 {
 191         char buf[32];
 192
 193         printf ("CPU:   Freescale Coldfire MCF5249 at %s MHz\n", strmhz(buf, CFG_CLK));
 194         return 0;
 195 }
 196
 197 int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[]) {
 198         /* enable watchdog, set timeout to 0 and wait */
 199         mbar_writeByte(MCFSIM_SYPCR, 0xc0);
 200         while (1);
 201
 202         /* we don't return! */
 203         return 0;
 204 };
 205 #endif