3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
10 * Texas Instruments, <www.ti.com>
17 * SPDX-License-Identifier: GPL-2.0+
24 #include <asm/arch/systimer.h>
25 #include <asm/arch/sysctrl.h>
26 #include <asm/arch/wdt.h>
27 #include "../drivers/mmc/arm_pl180_mmci.h"
29 static ulong timestamp;
32 static struct systimer *systimer_base = (struct systimer *)V2M_TIMER01;
33 static struct sysctrl *sysctrl_base = (struct sysctrl *)SCTL_BASE;
35 static void flash__init(void);
36 static void vexpress_timer_init(void);
37 DECLARE_GLOBAL_DATA_PTR;
39 #if defined(CONFIG_SHOW_BOOT_PROGRESS)
40 void show_boot_progress(int progress)
42 printf("Boot reached stage %d\n", progress);
46 static inline void delay(ulong loops)
48 __asm__ volatile ("1:\n"
50 "bne 1b" : "=r" (loops) : "0" (loops));
55 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
56 gd->bd->bi_arch_number = MACH_TYPE_VEXPRESS;
61 vexpress_timer_init();
66 int board_eth_init(bd_t *bis)
70 rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
75 int cpu_mmc_init(bd_t *bis)
79 #ifdef CONFIG_ARM_PL180_MMCI
80 struct pl180_mmc_host *host;
82 host = malloc(sizeof(struct pl180_mmc_host));
85 memset(host, 0, sizeof(*host));
87 strcpy(host->name, "MMC");
88 host->base = (struct sdi_registers *)CONFIG_ARM_PL180_MMCI_BASE;
89 host->pwr_init = INIT_PWR;
90 host->clkdiv_init = SDI_CLKCR_CLKDIV_INIT_V1 | SDI_CLKCR_CLKEN;
91 host->voltages = VOLTAGE_WINDOW_MMC;
93 host->clock_in = ARM_MCLK;
94 host->clock_min = ARM_MCLK / (2 * (SDI_CLKCR_CLKDIV_INIT_V1 + 1));
95 host->clock_max = CONFIG_ARM_PL180_MMCI_CLOCK_FREQ;
96 rc = arm_pl180_mmci_init(host);
101 static void flash__init(void)
103 /* Setup the sytem control register to allow writing to flash */
104 writel(readl(&sysctrl_base->scflashctrl) | VEXPRESS_FLASHPROG_FLVPPEN,
105 &sysctrl_base->scflashctrl);
111 get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, PHYS_SDRAM_1_SIZE);
115 void dram_init_banksize(void)
117 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
118 gd->bd->bi_dram[0].size =
119 get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
120 gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
121 gd->bd->bi_dram[1].size =
122 get_ram_size((long *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
132 * Setup a 32 bit timer, running at 1KHz
133 * Versatile Express Motherboard provides 1 MHz timer
135 static void vexpress_timer_init(void)
138 * Set clock frequency in system controller:
139 * VEXPRESS_REFCLK is 32KHz
140 * VEXPRESS_TIMCLK is 1MHz
142 writel(SP810_TIMER0_ENSEL | SP810_TIMER1_ENSEL |
143 SP810_TIMER2_ENSEL | SP810_TIMER3_ENSEL |
144 readl(&sysctrl_base->scctrl), &sysctrl_base->scctrl);
148 * Enabled, free running, no interrupt, 32-bit, wrapping
150 writel(SYSTIMER_RELOAD, &systimer_base->timer0load);
151 writel(SYSTIMER_RELOAD, &systimer_base->timer0value);
152 writel(SYSTIMER_EN | SYSTIMER_32BIT |
153 readl(&systimer_base->timer0control),
154 &systimer_base->timer0control);
156 reset_timer_masked();
159 int v2m_cfg_write(u32 devfn, u32 data)
161 /* Configuration interface broken? */
164 devfn |= SYS_CFG_START | SYS_CFG_WRITE;
166 val = readl(V2M_SYS_CFGSTAT);
167 writel(val & ~SYS_CFG_COMPLETE, V2M_SYS_CFGSTAT);
169 writel(data, V2M_SYS_CFGDATA);
170 writel(devfn, V2M_SYS_CFGCTRL);
173 val = readl(V2M_SYS_CFGSTAT);
176 return !!(val & SYS_CFG_ERR);
179 /* Use the ARM Watchdog System to cause reset */
180 void reset_cpu(ulong addr)
182 if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
183 printf("Unable to reboot\n");
187 * Delay x useconds AND perserve advance timstamp value
188 * assumes timer is ticking at 1 msec
190 void __udelay(ulong usec)
195 tmp = get_timer(0); /* get current timestamp */
198 * If setting this forward will roll time stamp then
199 * reset "advancing" timestamp to 0 and set lastdec value
200 * otherwise set the advancing stamp to the wake up time
202 if ((tmo + tmp + 1) < tmp)
203 reset_timer_masked();
207 while (get_timer_masked() < tmo)
208 ; /* loop till wakeup event */
211 ulong get_timer(ulong base)
213 return get_timer_masked() - base;
216 void reset_timer_masked(void)
218 lastdec = readl(&systimer_base->timer0value) / 1000;
222 ulong get_timer_masked(void)
224 ulong now = readl(&systimer_base->timer0value) / 1000;
226 if (lastdec >= now) { /* normal mode (non roll) */
227 timestamp += lastdec - now;
228 } else { /* count down timer overflowed */
230 * nts = ts + ld - now
231 * ts = old stamp, ld = time before passing through - 1
232 * now = amount of time after passing though - 1
233 * nts = new "advancing time stamp"
235 timestamp += lastdec + SYSTIMER_RELOAD - now;
242 void lowlevel_init(void)
246 ulong get_board_rev(void){
247 return readl((u32 *)SYS_ID);
250 unsigned long long get_ticks(void)
255 ulong get_tbclk(void)
257 return (ulong)CONFIG_SYS_HZ;
260 #if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
261 /* Setting the address at which secondary cores start from.
262 * Versatile Express uses one address for all cores, so ignore corenr
264 void smp_set_core_boot_addr(unsigned long addr, int corenr)
266 /* The SYSFLAGS register on VExpress needs to be cleared first
267 * by writing to the next address, since any writes to the address
268 * at offset 0 will only be ORed in
270 writel(~0, CONFIG_SYSFLAGS_ADDR + 4);
271 writel(addr, CONFIG_SYSFLAGS_ADDR);