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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_GET_DRIVER(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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