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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  * SPDX-License-Identifier:     GPL-2.0+
18  */
19 #include <common.h>
20 #include <malloc.h>
21 #include <errno.h>
22 #include <netdev.h>
23 #include <asm/io.h>
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"
28
29 static ulong timestamp;
30 static ulong lastdec;
31
32 static struct systimer *systimer_base = (struct systimer *)V2M_TIMER01;
33 static struct sysctrl *sysctrl_base = (struct sysctrl *)SCTL_BASE;
34
35 static void flash__init(void);
36 static void vexpress_timer_init(void);
37 DECLARE_GLOBAL_DATA_PTR;
38
39 #if defined(CONFIG_SHOW_BOOT_PROGRESS)
40 void show_boot_progress(int progress)
41 {
42         printf("Boot reached stage %d\n", progress);
43 }
44 #endif
45
46 static inline void delay(ulong loops)
47 {
48         __asm__ volatile ("1:\n"
49                 "subs %0, %1, #1\n"
50                 "bne 1b" : "=r" (loops) : "0" (loops));
51 }
52
53 int board_init(void)
54 {
55         gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
56         gd->bd->bi_arch_number = MACH_TYPE_VEXPRESS;
57         gd->flags = 0;
58
59         icache_enable();
60         flash__init();
61         vexpress_timer_init();
62
63         return 0;
64 }
65
66 int board_eth_init(bd_t *bis)
67 {
68         int rc = 0;
69 #ifdef CONFIG_SMC911X
70         rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
71 #endif
72         return rc;
73 }
74
75 int cpu_mmc_init(bd_t *bis)
76 {
77         int rc = 0;
78         (void) bis;
79 #ifdef CONFIG_ARM_PL180_MMCI
80         struct pl180_mmc_host *host;
81
82         host = malloc(sizeof(struct pl180_mmc_host));
83         if (!host)
84                 return -ENOMEM;
85         memset(host, 0, sizeof(*host));
86
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;
92         host->caps = 0;
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);
97 #endif
98         return rc;
99 }
100
101 static void flash__init(void)
102 {
103         /* Setup the sytem control register to allow writing to flash */
104         writel(readl(&sysctrl_base->scflashctrl) | VEXPRESS_FLASHPROG_FLVPPEN,
105                &sysctrl_base->scflashctrl);
106 }
107
108 int dram_init(void)
109 {
110         gd->ram_size =
111                 get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, PHYS_SDRAM_1_SIZE);
112         return 0;
113 }
114
115 void dram_init_banksize(void)
116 {
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);
123 }
124
125 int timer_init(void)
126 {
127         return 0;
128 }
129
130 /*
131  * Start timer:
132  *    Setup a 32 bit timer, running at 1KHz
133  *    Versatile Express Motherboard provides 1 MHz timer
134  */
135 static void vexpress_timer_init(void)
136 {
137         /*
138          * Set clock frequency in system controller:
139          *   VEXPRESS_REFCLK is 32KHz
140          *   VEXPRESS_TIMCLK is 1MHz
141          */
142         writel(SP810_TIMER0_ENSEL | SP810_TIMER1_ENSEL |
143                SP810_TIMER2_ENSEL | SP810_TIMER3_ENSEL |
144                readl(&sysctrl_base->scctrl), &sysctrl_base->scctrl);
145
146         /*
147          * Set Timer0 to be:
148          *   Enabled, free running, no interrupt, 32-bit, wrapping
149          */
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);
155
156         reset_timer_masked();
157 }
158
159 int v2m_cfg_write(u32 devfn, u32 data)
160 {
161         /* Configuration interface broken? */
162         u32 val;
163
164         devfn |= SYS_CFG_START | SYS_CFG_WRITE;
165
166         val = readl(V2M_SYS_CFGSTAT);
167         writel(val & ~SYS_CFG_COMPLETE, V2M_SYS_CFGSTAT);
168
169         writel(data, V2M_SYS_CFGDATA);
170         writel(devfn, V2M_SYS_CFGCTRL);
171
172         do {
173                 val = readl(V2M_SYS_CFGSTAT);
174         } while (val == 0);
175
176         return !!(val & SYS_CFG_ERR);
177 }
178
179 /* Use the ARM Watchdog System to cause reset */
180 void reset_cpu(ulong addr)
181 {
182         if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
183                 printf("Unable to reboot\n");
184 }
185
186 /*
187  * Delay x useconds AND perserve advance timstamp value
188  *     assumes timer is ticking at 1 msec
189  */
190 void __udelay(ulong usec)
191 {
192         ulong tmo, tmp;
193
194         tmo = usec / 1000;
195         tmp = get_timer(0);     /* get current timestamp */
196
197         /*
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
201          */
202         if ((tmo + tmp + 1) < tmp)
203                 reset_timer_masked();
204         else
205                 tmo += tmp;
206
207         while (get_timer_masked() < tmo)
208                 ; /* loop till wakeup event */
209 }
210
211 ulong get_timer(ulong base)
212 {
213         return get_timer_masked() - base;
214 }
215
216 void reset_timer_masked(void)
217 {
218         lastdec = readl(&systimer_base->timer0value) / 1000;
219         timestamp = 0;
220 }
221
222 ulong get_timer_masked(void)
223 {
224         ulong now = readl(&systimer_base->timer0value) / 1000;
225
226         if (lastdec >= now) {   /* normal mode (non roll) */
227                 timestamp += lastdec - now;
228         } else {                /* count down timer overflowed */
229                 /*
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"
234                  */
235                 timestamp += lastdec + SYSTIMER_RELOAD - now;
236         }
237         lastdec = now;
238
239         return timestamp;
240 }
241
242 void lowlevel_init(void)
243 {
244 }
245
246 ulong get_board_rev(void){
247         return readl((u32 *)SYS_ID);
248 }
249
250 unsigned long long get_ticks(void)
251 {
252         return get_timer(0);
253 }
254
255 ulong get_tbclk(void)
256 {
257         return (ulong)CONFIG_SYS_HZ;
258 }