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![Masahiro Yamada](/assets/img/avatar_default.png)
If CONFIG_MICRO_SUPPORT_CARD is enabled, U-Boot tries to get access to the devices on the support card, which may not actually exist. Check the DT and search for the on-board devices run-time. If the nodes are not found in DT, then disable the code. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
269 lines
5.0 KiB
C
269 lines
5.0 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) 2015-2016 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*/
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#include <common.h>
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#include <linux/ctype.h>
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#include <linux/io.h>
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#include "micro-support-card.h"
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#define MICRO_SUPPORT_CARD_BASE 0x43f00000
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#define SMC911X_BASE ((MICRO_SUPPORT_CARD_BASE) + 0x00000)
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#define LED_BASE ((MICRO_SUPPORT_CARD_BASE) + 0x90000)
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#define NS16550A_BASE ((MICRO_SUPPORT_CARD_BASE) + 0xb0000)
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#define MICRO_SUPPORT_CARD_RESET ((MICRO_SUPPORT_CARD_BASE) + 0xd0034)
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#define MICRO_SUPPORT_CARD_REVISION ((MICRO_SUPPORT_CARD_BASE) + 0xd00E0)
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static bool support_card_found;
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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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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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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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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, 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, 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(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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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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#if defined(CONFIG_SMC911X)
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#include <netdev.h>
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int board_eth_init(bd_t *bis)
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{
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if (!support_card_found)
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return 0;
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return smc911x_initialize(0, SMC911X_BASE);
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}
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#endif
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#if defined(CONFIG_MTD_NOR_FLASH)
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#include <mtd/cfi_flash.h>
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struct memory_bank {
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phys_addr_t base;
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unsigned long size;
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};
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static int mem_is_flash(const struct memory_bank *mem)
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{
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const int loop = 128;
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u32 *scratch_addr;
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u32 saved_value;
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int ret = 1;
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int i;
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/* just in case, use the tail of the memory bank */
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scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop,
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sizeof(u32) * loop, MAP_NOCACHE);
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for (i = 0; i < loop; i++, scratch_addr++) {
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saved_value = readl(scratch_addr);
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writel(~saved_value, scratch_addr);
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if (readl(scratch_addr) != saved_value) {
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/* We assume no memory or SRAM here. */
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writel(saved_value, scratch_addr);
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ret = 0;
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break;
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}
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}
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unmap_physmem(scratch_addr, MAP_NOCACHE);
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return ret;
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}
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/* {address, size} */
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static const struct memory_bank memory_banks[] = {
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{0x42000000, 0x01f00000},
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};
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static const struct memory_bank
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*flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT];
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phys_addr_t cfi_flash_bank_addr(int i)
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{
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return flash_banks_list[i]->base;
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}
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unsigned long cfi_flash_bank_size(int i)
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{
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return flash_banks_list[i]->size;
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}
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static void detect_num_flash_banks(void)
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{
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const struct memory_bank *memory_bank, *end;
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cfi_flash_num_flash_banks = 0;
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memory_bank = memory_banks;
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end = memory_bank + ARRAY_SIZE(memory_banks);
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for (; memory_bank < end; memory_bank++) {
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if (cfi_flash_num_flash_banks >=
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CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
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break;
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if (mem_is_flash(memory_bank)) {
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flash_banks_list[cfi_flash_num_flash_banks] =
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memory_bank;
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debug("flash bank found: base = 0x%lx, size = 0x%lx\n",
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(unsigned long)memory_bank->base,
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(unsigned long)memory_bank->size);
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cfi_flash_num_flash_banks++;
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}
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}
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debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
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}
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#else /* CONFIG_MTD_NOR_FLASH */
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static void detect_num_flash_banks(void)
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{
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};
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#endif /* CONFIG_MTD_NOR_FLASH */
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void support_card_late_init(void)
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{
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if (!support_card_found)
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return;
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detect_num_flash_banks();
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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, LED_BASE);
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}
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