u-boot/arch/arm/mach-uniphier/micro-support-card.c
Masahiro Yamada 66e3efebbc ARM: uniphier: insert udelay() just before support_card_reset_deassert()
As for LD11/LD20, we can no longer rely on the udelay() in the PLL
init functions.  udelay(200) is needed here to keep the ethernet
device in the reset state for enough time.  Anyway, 200 usec is
quite short for humans, so nobody cares it.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-10-10 10:03:23 +09:00

238 lines
4.5 KiB
C

/*
* Copyright (C) 2012-2015 Panasonic Corporation
* Copyright (C) 2015-2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/ctype.h>
#include <linux/io.h>
#include "micro-support-card.h"
#define MICRO_SUPPORT_CARD_BASE 0x43f00000
#define SMC911X_BASE ((MICRO_SUPPORT_CARD_BASE) + 0x00000)
#define LED_BASE ((MICRO_SUPPORT_CARD_BASE) + 0x90000)
#define NS16550A_BASE ((MICRO_SUPPORT_CARD_BASE) + 0xb0000)
#define MICRO_SUPPORT_CARD_RESET ((MICRO_SUPPORT_CARD_BASE) + 0xd0034)
#define MICRO_SUPPORT_CARD_REVISION ((MICRO_SUPPORT_CARD_BASE) + 0xd00E0)
/*
* 0: reset deassert, 1: reset
*
* bit[0]: LAN, I2C, LED
* bit[1]: UART
*/
void support_card_reset_deassert(void)
{
writel(0x00010000, MICRO_SUPPORT_CARD_RESET);
}
void support_card_reset(void)
{
writel(0x00020003, MICRO_SUPPORT_CARD_RESET);
}
static int support_card_show_revision(void)
{
u32 revision;
revision = readl(MICRO_SUPPORT_CARD_REVISION);
revision &= 0xff;
/* revision 3.6.x card changed the revision format */
printf("(CPLD version %s%d.%d)\n", revision >> 4 == 6 ? "3." : "",
revision >> 4, revision & 0xf);
return 0;
}
int checkboard(void)
{
printf("SC: Micro Support Card ");
return support_card_show_revision();
}
void support_card_init(void)
{
/*
* After power on, we need to keep the LAN controller in reset state
* for a while. (200 usec)
*/
udelay(200);
support_card_reset_deassert();
}
#if defined(CONFIG_SMC911X)
#include <netdev.h>
int board_eth_init(bd_t *bis)
{
return smc911x_initialize(0, SMC911X_BASE);
}
#endif
#if !defined(CONFIG_SYS_NO_FLASH)
#include <mtd/cfi_flash.h>
struct memory_bank {
phys_addr_t base;
unsigned long size;
};
static int mem_is_flash(const struct memory_bank *mem)
{
const int loop = 128;
u32 *scratch_addr;
u32 saved_value;
int ret = 1;
int i;
/* just in case, use the tail of the memory bank */
scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
sizeof(u32) * loop, MAP_NOCACHE);
for (i = 0; i < loop; i++, scratch_addr++) {
saved_value = readl(scratch_addr);
writel(~saved_value, scratch_addr);
if (readl(scratch_addr) != saved_value) {
/* We assume no memory or SRAM here. */
writel(saved_value, scratch_addr);
ret = 0;
break;
}
}
unmap_physmem(scratch_addr, MAP_NOCACHE);
return ret;
}
/* {address, size} */
static const struct memory_bank memory_banks[] = {
{0x42000000, 0x01f00000},
};
static const struct memory_bank
*flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
phys_addr_t cfi_flash_bank_addr(int i)
{
return flash_banks_list[i]->base;
}
unsigned long cfi_flash_bank_size(int i)
{
return flash_banks_list[i]->size;
}
static void detect_num_flash_banks(void)
{
const struct memory_bank *memory_bank, *end;
cfi_flash_num_flash_banks = 0;
memory_bank = memory_banks;
end = memory_bank + ARRAY_SIZE(memory_banks);
for (; memory_bank < end; memory_bank++) {
if (cfi_flash_num_flash_banks >=
CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
break;
if (mem_is_flash(memory_bank)) {
flash_banks_list[cfi_flash_num_flash_banks] =
memory_bank;
debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
(unsigned long)memory_bank->base,
(unsigned long)memory_bank->size);
cfi_flash_num_flash_banks++;
}
}
debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
}
#else /* CONFIG_SYS_NO_FLASH */
void detect_num_flash_banks(void)
{
};
#endif /* CONFIG_SYS_NO_FLASH */
void support_card_late_init(void)
{
detect_num_flash_banks();
}
static const u8 ledval_num[] = {
0x7e, /* 0 */
0x0c, /* 1 */
0xb6, /* 2 */
0x9e, /* 3 */
0xcc, /* 4 */
0xda, /* 5 */
0xfa, /* 6 */
0x4e, /* 7 */
0xfe, /* 8 */
0xde, /* 9 */
};
static const u8 ledval_alpha[] = {
0xee, /* A */
0xf8, /* B */
0x72, /* C */
0xbc, /* D */
0xf2, /* E */
0xe2, /* F */
0x7a, /* G */
0xe8, /* H */
0x08, /* I */
0x3c, /* J */
0xea, /* K */
0x70, /* L */
0x6e, /* M */
0xa8, /* N */
0xb8, /* O */
0xe6, /* P */
0xce, /* Q */
0xa0, /* R */
0xc8, /* S */
0x8c, /* T */
0x7c, /* U */
0x54, /* V */
0xfc, /* W */
0xec, /* X */
0xdc, /* Y */
0xa4, /* Z */
};
static u8 char2ledval(char c)
{
if (isdigit(c))
return ledval_num[c - '0'];
else if (isalpha(c))
return ledval_alpha[toupper(c) - 'A'];
return 0;
}
void led_puts(const char *s)
{
int i;
u32 val = 0;
if (!s)
return;
for (i = 0; i < 4; i++) {
val <<= 8;
val |= char2ledval(*s);
if (*s != '\0')
s++;
}
writel(~val, LED_BASE);
}