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/*
* 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
*/
static void support_card_reset_deassert(void)
{
writel(0x00010000, MICRO_SUPPORT_CARD_RESET);
}
static 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("SC: Micro Support Card (CPLD version %s%d.%d)\n",
revision >> 4 == 6 ? "3." : "",
revision >> 4, revision & 0xf);
return 0;
}
void support_card_init(void)
{
support_card_reset();
/*
* After power on, we need to keep the LAN controller in reset state
* for a while. (200 usec)
*/
udelay(200);
support_card_reset_deassert();
support_card_show_revision();
}
#if defined(CONFIG_SMC911X)
#include <netdev.h>
int board_eth_init(bd_t *bis)
{
return smc911x_initialize(0, SMC911X_BASE);
}
#endif
#if defined(CONFIG_MTD_NOR_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_MTD_NOR_FLASH */
static void detect_num_flash_banks(void)
{
};
#endif /* CONFIG_MTD_NOR_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);
}
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