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![Masahiro Yamada](/assets/img/avatar_default.png)
Move the bus initialization code to this driver from board files. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
192 lines
3.5 KiB
C
192 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2012-2015 Panasonic Corporation
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* Copyright (C) 2015-2020 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*/
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#include <dm.h>
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#include <fdt_support.h>
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#include <linux/ctype.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <asm/global_data.h>
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#include "micro-support-card.h"
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#define SMC911X_OFFSET 0x00000
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#define LED_OFFSET 0x90000
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#define NS16550A_OFFSET 0xb0000
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#define MICRO_SUPPORT_CARD_RESET 0xd0034
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#define MICRO_SUPPORT_CARD_REVISION 0xd00e0
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static bool support_card_found;
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static void __iomem *support_card_base;
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static void support_card_detect(void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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const void *fdt = gd->fdt_blob;
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int offset;
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u64 addr, addr2;
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offset = fdt_node_offset_by_compatible(fdt, 0, "smsc,lan9118");
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if (offset < 0)
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return;
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addr = fdt_get_base_address(fdt, offset);
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if (addr == OF_BAD_ADDR)
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return;
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addr -= SMC911X_OFFSET;
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offset = fdt_node_offset_by_compatible(fdt, 0, "ns16550a");
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if (offset < 0)
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return;
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addr2 = fdt_get_base_address(fdt, offset);
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if (addr2 == OF_BAD_ADDR)
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return;
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addr2 -= NS16550A_OFFSET;
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/* sanity check */
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if (addr != addr2)
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return;
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support_card_base = ioremap(addr, 0x100000);
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support_card_found = true;
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}
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/*
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* 0: reset deassert, 1: reset
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*
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* bit[0]: LAN, I2C, LED
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* bit[1]: UART
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*/
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static void support_card_reset_deassert(void)
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{
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writel(0x00010000, support_card_base + MICRO_SUPPORT_CARD_RESET);
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}
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static void support_card_reset(void)
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{
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writel(0x00020003, support_card_base + MICRO_SUPPORT_CARD_RESET);
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}
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static int support_card_show_revision(void)
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{
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u32 revision;
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revision = readl(support_card_base + MICRO_SUPPORT_CARD_REVISION);
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revision &= 0xff;
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/* revision 3.6.x card changed the revision format */
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printf("SC: Micro Support Card (CPLD version %s%d.%d)\n",
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revision >> 4 == 6 ? "3." : "",
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revision >> 4, revision & 0xf);
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return 0;
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}
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void support_card_init(void)
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{
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struct udevice *dev;
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int ret;
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/* The system bus must be initialized for access to the support card. */
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ret = uclass_get_device_by_driver(UCLASS_SIMPLE_BUS,
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DM_GET_DRIVER(uniphier_system_bus_driver),
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&dev);
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if (ret)
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return;
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/* Check DT to see if this board has the support card. */
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support_card_detect();
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if (!support_card_found)
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return;
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support_card_reset();
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/*
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* After power on, we need to keep the LAN controller in reset state
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* for a while. (200 usec)
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*/
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udelay(200);
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support_card_reset_deassert();
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support_card_show_revision();
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}
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static const u8 ledval_num[] = {
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0x7e, /* 0 */
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0x0c, /* 1 */
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0xb6, /* 2 */
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0x9e, /* 3 */
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0xcc, /* 4 */
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0xda, /* 5 */
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0xfa, /* 6 */
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0x4e, /* 7 */
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0xfe, /* 8 */
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0xde, /* 9 */
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};
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static const u8 ledval_alpha[] = {
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0xee, /* A */
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0xf8, /* B */
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0x72, /* C */
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0xbc, /* D */
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0xf2, /* E */
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0xe2, /* F */
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0x7a, /* G */
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0xe8, /* H */
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0x08, /* I */
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0x3c, /* J */
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0xea, /* K */
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0x70, /* L */
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0x6e, /* M */
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0xa8, /* N */
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0xb8, /* O */
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0xe6, /* P */
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0xce, /* Q */
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0xa0, /* R */
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0xc8, /* S */
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0x8c, /* T */
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0x7c, /* U */
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0x54, /* V */
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0xfc, /* W */
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0xec, /* X */
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0xdc, /* Y */
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0xa4, /* Z */
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};
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static u8 char2ledval(char c)
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{
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if (isdigit(c))
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return ledval_num[c - '0'];
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else if (isalpha(c))
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return ledval_alpha[toupper(c) - 'A'];
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return 0;
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}
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void led_puts(const char *s)
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{
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int i;
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u32 val = 0;
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if (!support_card_found)
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return;
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if (!s)
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return;
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for (i = 0; i < 4; i++) {
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val <<= 8;
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val |= char2ledval(*s);
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if (*s != '\0')
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s++;
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}
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writel(~val, support_card_base + LED_OFFSET);
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}
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