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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012-2015 Panasonic Corporation
* Copyright (C) 2015-2020 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <dm.h>
#include <fdt_support.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/global_data.h>
#include "micro-support-card.h"
#define SMC911X_OFFSET 0x00000
#define LED_OFFSET 0x90000
#define NS16550A_OFFSET 0xb0000
#define MICRO_SUPPORT_CARD_RESET 0xd0034
#define MICRO_SUPPORT_CARD_REVISION 0xd00e0
static bool support_card_found;
static void __iomem *support_card_base;
static void support_card_detect(void)
{
DECLARE_GLOBAL_DATA_PTR;
const void *fdt = gd->fdt_blob;
int offset;
u64 addr, addr2;
offset = fdt_node_offset_by_compatible(fdt, 0, "smsc,lan9118");
if (offset < 0)
return;
addr = fdt_get_base_address(fdt, offset);
if (addr == OF_BAD_ADDR)
return;
addr -= SMC911X_OFFSET;
offset = fdt_node_offset_by_compatible(fdt, 0, "ns16550a");
if (offset < 0)
return;
addr2 = fdt_get_base_address(fdt, offset);
if (addr2 == OF_BAD_ADDR)
return;
addr2 -= NS16550A_OFFSET;
/* sanity check */
if (addr != addr2)
return;
support_card_base = ioremap(addr, 0x100000);
support_card_found = true;
}
/*
* 0: reset deassert, 1: reset
*
* bit[0]: LAN, I2C, LED
* bit[1]: UART
*/
static void support_card_reset_deassert(void)
{
writel(0x00010000, support_card_base + MICRO_SUPPORT_CARD_RESET);
}
static void support_card_reset(void)
{
writel(0x00020003, support_card_base + MICRO_SUPPORT_CARD_RESET);
}
static int support_card_show_revision(void)
{
u32 revision;
revision = readl(support_card_base + 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)
{
struct udevice *dev;
int ret;
/* The system bus must be initialized for access to the support card. */
ret = uclass_get_device_by_driver(UCLASS_SIMPLE_BUS,
DM_DRIVER_GET(uniphier_system_bus_driver),
&dev);
if (ret)
return;
/* Check DT to see if this board has the support card. */
support_card_detect();
if (!support_card_found)
return;
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();
}
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 (!support_card_found)
return;
if (!s)
return;
for (i = 0; i < 4; i++) {
val <<= 8;
val |= char2ledval(*s);
if (*s != '\0')
s++;
}
writel(~val, support_card_base + LED_OFFSET);
}
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