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 <malloc.h> 37 #include <errno.h> 38 #include <netdev.h> 39 #include <asm/io.h> 40 #include <asm/arch/systimer.h> 41 #include <asm/arch/sysctrl.h> 42 #include <asm/arch/wdt.h> 43 #include "../drivers/mmc/arm_pl180_mmci.h" 44 45 static ulong timestamp; 46 static ulong lastdec; 47 48 static struct wdt *wdt_base = (struct wdt *)WDT_BASE; 49 static struct systimer *systimer_base = (struct systimer *)SYSTIMER_BASE; 50 static struct sysctrl *sysctrl_base = (struct sysctrl *)SCTL_BASE; 51 52 static void flash__init(void); 53 static void vexpress_timer_init(void); 54 DECLARE_GLOBAL_DATA_PTR; 55 56 #if defined(CONFIG_SHOW_BOOT_PROGRESS) 57 void show_boot_progress(int progress) 58 { 59 printf("Boot reached stage %d\n", progress); 60 } 61 #endif 62 63 static inline void delay(ulong loops) 64 { 65 __asm__ volatile ("1:\n" 66 "subs %0, %1, #1\n" 67 "bne 1b" : "=r" (loops) : "0" (loops)); 68 } 69 70 int board_init(void) 71 { 72 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR; 73 gd->bd->bi_arch_number = MACH_TYPE_VEXPRESS; 74 gd->flags = 0; 75 76 icache_enable(); 77 flash__init(); 78 vexpress_timer_init(); 79 80 return 0; 81 } 82 83 int board_eth_init(bd_t *bis) 84 { 85 int rc = 0; 86 #ifdef CONFIG_SMC911X 87 rc = smc911x_initialize(0, CONFIG_SMC911X_BASE); 88 #endif 89 return rc; 90 } 91 92 int cpu_mmc_init(bd_t *bis) 93 { 94 int rc = 0; 95 (void) bis; 96 #ifdef CONFIG_ARM_PL180_MMCI 97 struct pl180_mmc_host *host; 98 99 host = malloc(sizeof(struct pl180_mmc_host)); 100 if (!host) 101 return -ENOMEM; 102 memset(host, 0, sizeof(*host)); 103 104 strcpy(host->name, "MMC"); 105 host->base = (struct sdi_registers *)CONFIG_ARM_PL180_MMCI_BASE; 106 host->pwr_init = INIT_PWR; 107 host->clkdiv_init = SDI_CLKCR_CLKDIV_INIT_V1 | SDI_CLKCR_CLKEN; 108 host->voltages = VOLTAGE_WINDOW_MMC; 109 host->caps = 0; 110 host->clock_in = ARM_MCLK; 111 host->clock_min = ARM_MCLK / (2 * (SDI_CLKCR_CLKDIV_INIT_V1 + 1)); 112 host->clock_max = CONFIG_ARM_PL180_MMCI_CLOCK_FREQ; 113 rc = arm_pl180_mmci_init(host); 114 #endif 115 return rc; 116 } 117 118 static void flash__init(void) 119 { 120 /* Setup the sytem control register to allow writing to flash */ 121 writel(readl(&sysctrl_base->scflashctrl) | VEXPRESS_FLASHPROG_FLVPPEN, 122 &sysctrl_base->scflashctrl); 123 } 124 125 int dram_init(void) 126 { 127 gd->ram_size = 128 get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, PHYS_SDRAM_1_SIZE); 129 return 0; 130 } 131 132 void dram_init_banksize(void) 133 { 134 gd->bd->bi_dram[0].start = PHYS_SDRAM_1; 135 gd->bd->bi_dram[0].size = 136 get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE); 137 gd->bd->bi_dram[1].start = PHYS_SDRAM_2; 138 gd->bd->bi_dram[1].size = 139 get_ram_size((long *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE); 140 } 141 142 int timer_init(void) 143 { 144 return 0; 145 } 146 147 /* 148 * Start timer: 149 * Setup a 32 bit timer, running at 1KHz 150 * Versatile Express Motherboard provides 1 MHz timer 151 */ 152 static void vexpress_timer_init(void) 153 { 154 /* 155 * Set clock frequency in system controller: 156 * VEXPRESS_REFCLK is 32KHz 157 * VEXPRESS_TIMCLK is 1MHz 158 */ 159 writel(SP810_TIMER0_ENSEL | SP810_TIMER1_ENSEL | 160 SP810_TIMER2_ENSEL | SP810_TIMER3_ENSEL | 161 readl(&sysctrl_base->scctrl), &sysctrl_base->scctrl); 162 163 /* 164 * Set Timer0 to be: 165 * Enabled, free running, no interrupt, 32-bit, wrapping 166 */ 167 writel(SYSTIMER_RELOAD, &systimer_base->timer0load); 168 writel(SYSTIMER_RELOAD, &systimer_base->timer0value); 169 writel(SYSTIMER_EN | SYSTIMER_32BIT | 170 readl(&systimer_base->timer0control), 171 &systimer_base->timer0control); 172 173 reset_timer_masked(); 174 } 175 176 /* Use the ARM Watchdog System to cause reset */ 177 void reset_cpu(ulong addr) 178 { 179 writeb(WDT_EN, &wdt_base->wdogcontrol); 180 writel(WDT_RESET_LOAD, &wdt_base->wdogload); 181 while (1) 182 ; 183 } 184 185 /* 186 * Delay x useconds AND perserve advance timstamp value 187 * assumes timer is ticking at 1 msec 188 */ 189 void __udelay(ulong usec) 190 { 191 ulong tmo, tmp; 192 193 tmo = usec / 1000; 194 tmp = get_timer(0); /* get current timestamp */ 195 196 /* 197 * If setting this forward will roll time stamp then 198 * reset "advancing" timestamp to 0 and set lastdec value 199 * otherwise set the advancing stamp to the wake up time 200 */ 201 if ((tmo + tmp + 1) < tmp) 202 reset_timer_masked(); 203 else 204 tmo += tmp; 205 206 while (get_timer_masked() < tmo) 207 ; /* loop till wakeup event */ 208 } 209 210 ulong get_timer(ulong base) 211 { 212 return get_timer_masked() - base; 213 } 214 215 void reset_timer_masked(void) 216 { 217 lastdec = readl(&systimer_base->timer0value) / 1000; 218 timestamp = 0; 219 } 220 221 ulong get_timer_masked(void) 222 { 223 ulong now = readl(&systimer_base->timer0value) / 1000; 224 225 if (lastdec >= now) { /* normal mode (non roll) */ 226 timestamp += lastdec - now; 227 } else { /* count down timer overflowed */ 228 /* 229 * nts = ts + ld - now 230 * ts = old stamp, ld = time before passing through - 1 231 * now = amount of time after passing though - 1 232 * nts = new "advancing time stamp" 233 */ 234 timestamp += lastdec + SYSTIMER_RELOAD - now; 235 } 236 lastdec = now; 237 238 return timestamp; 239 } 240 241 void lowlevel_init(void) 242 { 243 } 244 245 ulong get_board_rev(void){ 246 return readl((u32 *)SYS_ID); 247 } 248 249 unsigned long long get_ticks(void) 250 { 251 return get_timer(0); 252 } 253 254 ulong get_tbclk(void) 255 { 256 return (ulong)CONFIG_SYS_HZ; 257 } 258