board/armltd/vexpress/ca9x4_ct_vxp.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * (C) Copyright 2002
   7  * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
   8  *
   9  * (C) Copyright 2003
  10  * Texas Instruments, <www.ti.com>
  11  * Kshitij Gupta <Kshitij@ti.com>
  12  *
  13  * (C) Copyright 2004
  14  * ARM Ltd.
  15  * Philippe Robin, <philippe.robin@arm.com>
  16  *
  17  * See file CREDITS for list of people who contributed to this
  18  * project.
  19  *
  20  * This program is free software; you can redistribute it and/or
  21  * modify it under the terms of the GNU General Public License as
  22  * published by the Free Software Foundation; either version 2 of
  23  * the License, or (at your option) any later version.
  24  *
  25  * This program is distributed in the hope that it will be useful,
  26  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  27  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28  * GNU General Public License for more details.
  29  *
  30  * You should have received a copy of the GNU General Public License
  31  * along with this program; if not, write to the Free Software
  32  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  33  * MA 02111-1307 USA
  34  */
  35 #include <common.h>
  36 #include <netdev.h>
  37 #include <asm/io.h>
  38 #include <asm/arch/systimer.h>
  39 #include <asm/arch/sysctrl.h>
  40 #include <asm/arch/wdt.h>
  41 #include "../drivers/mmc/arm_pl180_mmci.h"
  42
  43 static ulong timestamp;
  44 static ulong lastdec;
  45
  46 static struct wdt *wdt_base = (struct wdt *)WDT_BASE;
  47 static struct systimer *systimer_base = (struct systimer *)SYSTIMER_BASE;
  48 static struct sysctrl *sysctrl_base = (struct sysctrl *)SCTL_BASE;
  49
  50 static void flash__init(void);
  51 static void vexpress_timer_init(void);
  52 DECLARE_GLOBAL_DATA_PTR;
  53
  54 #if defined(CONFIG_SHOW_BOOT_PROGRESS)
  55 void show_boot_progress(int progress)
  56 {
  57         printf("Boot reached stage %d\n", progress);
  58 }
  59 #endif
  60
  61 static inline void delay(ulong loops)
  62 {
  63         __asm__ volatile ("1:\n"
  64                 "subs %0, %1, #1\n"
  65                 "bne 1b" : "=r" (loops) : "0" (loops));
  66 }
  67
  68 int board_init(void)
  69 {
  70         gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
  71         gd->bd->bi_arch_number = MACH_TYPE_VEXPRESS;
  72         gd->flags = 0;
  73
  74         icache_enable();
  75         flash__init();
  76         vexpress_timer_init();
  77
  78         return 0;
  79 }
  80
  81 int board_eth_init(bd_t *bis)
  82 {
  83         int rc = 0;
  84 #ifdef CONFIG_SMC911X
  85         rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
  86 #endif
  87         return rc;
  88 }
  89
  90 int cpu_mmc_init(bd_t *bis)
  91 {
  92         int rc = 0;
  93 #ifdef CONFIG_ARM_PL180_MMCI
  94         rc = arm_pl180_mmci_init();
  95 #endif
  96         return rc;
  97 }
  98
  99 static void flash__init(void)
 100 {
 101         /* Setup the sytem control register to allow writing to flash */
 102         writel(readl(&sysctrl_base->scflashctrl) | VEXPRESS_FLASHPROG_FLVPPEN,
 103                &sysctrl_base->scflashctrl);
 104 }
 105
 106 int dram_init(void)
 107 {
 108         gd->ram_size =
 109                 get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, PHYS_SDRAM_1_SIZE);
 110         return 0;
 111 }
 112
 113 void dram_init_banksize(void)
 114 {
 115         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
 116         gd->bd->bi_dram[0].size =
 117                         get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
 118         gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
 119         gd->bd->bi_dram[1].size =
 120                         get_ram_size((long *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
 121 }
 122
 123 int timer_init(void)
 124 {
 125         return 0;
 126 }
 127
 128 /*
 129  * Start timer:
 130  *    Setup a 32 bit timer, running at 1KHz
 131  *    Versatile Express Motherboard provides 1 MHz timer
 132  */
 133 static void vexpress_timer_init(void)
 134 {
 135         /*
 136          * Set clock frequency in system controller:
 137          *   VEXPRESS_REFCLK is 32KHz
 138          *   VEXPRESS_TIMCLK is 1MHz
 139          */
 140         writel(SP810_TIMER0_ENSEL | SP810_TIMER1_ENSEL |
 141                SP810_TIMER2_ENSEL | SP810_TIMER3_ENSEL |
 142                readl(&sysctrl_base->scctrl), &sysctrl_base->scctrl);
 143
 144         /*
 145          * Set Timer0 to be:
 146          *   Enabled, free running, no interrupt, 32-bit, wrapping
 147          */
 148         writel(SYSTIMER_RELOAD, &systimer_base->timer0load);
 149         writel(SYSTIMER_RELOAD, &systimer_base->timer0value);
 150         writel(SYSTIMER_EN | SYSTIMER_32BIT | \
 151                readl(&systimer_base->timer0control), \
 152                &systimer_base->timer0control);
 153
 154         reset_timer_masked();
 155 }
 156
 157 /* Use the ARM Watchdog System to cause reset */
 158 void reset_cpu(ulong addr)
 159 {
 160         writeb(WDT_EN, &wdt_base->wdogcontrol);
 161         writel(WDT_RESET_LOAD, &wdt_base->wdogload);
 162         while (1)
 163                 ;
 164 }
 165
 166 /*
 167  * Delay x useconds AND perserve advance timstamp value
 168  *     assumes timer is ticking at 1 msec
 169  */
 170 void __udelay(ulong usec)
 171 {
 172         ulong tmo, tmp;
 173
 174         tmo = usec / 1000;
 175         tmp = get_timer(0);     /* get current timestamp */
 176
 177         /*
 178          * If setting this forward will roll time stamp then
 179          * reset "advancing" timestamp to 0 and set lastdec value
 180          * otherwise set the advancing stamp to the wake up time
 181          */
 182         if ((tmo + tmp + 1) < tmp)
 183                 reset_timer_masked();
 184         else
 185                 tmo += tmp;
 186
 187         while (get_timer_masked() < tmo)
 188                 ; /* loop till wakeup event */
 189 }
 190
 191 ulong get_timer(ulong base)
 192 {
 193         return get_timer_masked() - base;
 194 }
 195
 196 void reset_timer_masked(void)
 197 {
 198         lastdec = readl(&systimer_base->timer0value) / 1000;
 199         timestamp = 0;
 200 }
 201
 202 ulong get_timer_masked(void)
 203 {
 204         ulong now = readl(&systimer_base->timer0value) / 1000;
 205
 206         if (lastdec >= now) {   /* normal mode (non roll) */
 207                 timestamp += lastdec - now;
 208         } else {                /* count down timer overflowed */
 209                 /*
 210                  * nts = ts + ld - now
 211                  * ts = old stamp, ld = time before passing through - 1
 212                  * now = amount of time after passing though - 1
 213                  * nts = new "advancing time stamp"
 214                  */
 215                 timestamp += lastdec + SYSTIMER_RELOAD - now;
 216         }
 217         lastdec = now;
 218
 219         return timestamp;
 220 }
 221
 222 void lowlevel_init(void)
 223 {
 224 }
 225
 226 ulong get_board_rev(void){
 227         return readl((u32 *)SYS_ID);
 228 }
 229
 230 unsigned long long get_ticks(void)
 231 {
 232         return get_timer(0);
 233 }
 234
 235 ulong get_tbclk (void)
 236 {
 237         return (ulong)CONFIG_SYS_HZ;
 238 }