summaryrefslogtreecommitdiff
path: root/arch/arm/mach-uniphier/micro-support-card.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-uniphier/micro-support-card.c')
-rw-r--r--arch/arm/mach-uniphier/micro-support-card.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/micro-support-card.c b/arch/arm/mach-uniphier/micro-support-card.c
new file mode 100644
index 0000000..4c34748
--- /dev/null
+++ b/arch/arm/mach-uniphier/micro-support-card.c
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/ctype.h>
+#include <linux/io.h>
+#include <mach/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
+ */
+void support_card_reset_deassert(void)
+{
+ writel(0, MICRO_SUPPORT_CARD_RESET);
+}
+
+void support_card_reset(void)
+{
+ writel(3, MICRO_SUPPORT_CARD_RESET);
+}
+
+static int support_card_show_revision(void)
+{
+ u32 revision;
+
+ revision = readl(MICRO_SUPPORT_CARD_REVISION);
+ printf("(CPLD version %d.%d)\n", revision >> 4, revision & 0xf);
+ return 0;
+}
+
+int check_support_card(void)
+{
+ printf("SC: Micro Support Card ");
+ return support_card_show_revision();
+}
+
+void support_card_init(void)
+{
+ /*
+ * After power on, we need to keep the LAN controller in reset state
+ * for a while. (200 usec)
+ * Fortunately, enough wait time is already inserted in pll_init()
+ * function. So we do not have to wait here.
+ */
+ support_card_reset_deassert();
+}
+
+#if defined(CONFIG_SMC911X)
+#include <netdev.h>
+
+int board_eth_init(bd_t *bis)
+{
+ return smc911x_initialize(0, SMC911X_BASE);
+}
+#endif
+
+#if !defined(CONFIG_SYS_NO_FLASH)
+
+#include <mtd/cfi_flash.h>
+#include <mach/sbc-regs.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",
+ memory_bank->base, memory_bank->size);
+ cfi_flash_num_flash_banks++;
+ }
+ }
+
+ debug("number of flash banks: %d\n", cfi_flash_num_flash_banks);
+}
+#else /* CONFIG_SYS_NO_FLASH */
+void detect_num_flash_banks(void)
+{
+};
+#endif /* CONFIG_SYS_NO_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);
+}