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/*
* Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/io.h>
#include <mach/board.h>
#define MICRO_SUPPORT_CARD_RESET \
((CONFIG_SUPPORT_CARD_BASE) + 0x000D0034)
#define MICRO_SUPPORT_CARD_REVISION \
((CONFIG_SUPPORT_CARD_BASE) + 0x000D00E0)
/*
* 0: reset deassert, 1: reset
*
* bit[0]: LAN, I2C, LED
* bit[1]: UART
*/
void support_card_reset_deassert(void)
{
writel(0, MICRO_SUPPORT_CARD_RESET);
}
void support_card_reset(void)
{
writel(3, MICRO_SUPPORT_CARD_RESET);
}
static int support_card_show_revision(void)
{
u32 revision;
revision = readl(MICRO_SUPPORT_CARD_REVISION);
printf("(CPLD version %d.%d)\n", revision >> 4, revision & 0xf);
return 0;
}
int check_support_card(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)
* Fortunately, enough wait time is already inserted in pll_init()
* function. So we do not have to wait here.
*/
support_card_reset_deassert();
}
#if defined(CONFIG_SMC911X)
#include <netdev.h>
int board_eth_init(bd_t *bis)
{
return smc911x_initialize(0, CONFIG_SMC911X_BASE);
}
#endif
#if !defined(CONFIG_SYS_NO_FLASH)
#include <mtd/cfi_flash.h>
#include <mach/sbc-regs.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[] = {
{0x02000000, 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",
memory_bank->base, 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();
}
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