GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/arm/cpu/arm926ejs/spear/cpu.c

@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2010
+ * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/spr_misc.h>
+
+int arch_cpu_init(void)
+{
+	struct misc_regs *const misc_p =
+	    (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
+	u32 periph1_clken, periph_clk_cfg;
+
+	periph1_clken = readl(&misc_p->periph1_clken);
+
+#if defined(CONFIG_SPEAR3XX)
+	periph1_clken |= MISC_GPT2ENB;
+#elif defined(CONFIG_SPEAR600)
+	periph1_clken |= MISC_GPT3ENB;
+#endif
+
+#if defined(CONFIG_PL011_SERIAL)
+	periph1_clken |= MISC_UART0ENB;
+
+	periph_clk_cfg = readl(&misc_p->periph_clk_cfg);
+	periph_clk_cfg &= ~CONFIG_SPEAR_UARTCLKMSK;
+	periph_clk_cfg |= CONFIG_SPEAR_UART48M;
+	writel(periph_clk_cfg, &misc_p->periph_clk_cfg);
+#endif
+#if defined(CONFIG_ETH_DESIGNWARE)
+	periph1_clken |= MISC_ETHENB;
+#endif
+#if defined(CONFIG_DW_UDC)
+	periph1_clken |= MISC_USBDENB;
+#endif
+#if defined(CONFIG_SYS_I2C_DW)
+	periph1_clken |= MISC_I2CENB;
+#endif
+#if defined(CONFIG_ST_SMI)
+	periph1_clken |= MISC_SMIENB;
+#endif
+#if defined(CONFIG_NAND_FSMC)
+	periph1_clken |= MISC_FSMCENB;
+#endif
+#if defined(CONFIG_USB_EHCI_SPEAR)
+	periph1_clken |= PERIPH_USBH1 | PERIPH_USBH2;
+#endif
+#if defined(CONFIG_SPEAR_GPIO)
+	periph1_clken |= MISC_GPIO3ENB | MISC_GPIO4ENB;
+#endif
+#if defined(CONFIG_PL022_SPI)
+	periph1_clken |= MISC_SSP1ENB | MISC_SSP2ENB | MISC_SSP3ENB;
+#endif
+
+	writel(periph1_clken, &misc_p->periph1_clken);
+
+	return 0;
+}
+
+#ifdef CONFIG_DISPLAY_CPUINFO
+int print_cpuinfo(void)
+{
+#ifdef CONFIG_SPEAR300
+	printf("CPU:   SPEAr300\n");
+#elif defined(CONFIG_SPEAR310)
+	printf("CPU:   SPEAr310\n");
+#elif defined(CONFIG_SPEAR320)
+	printf("CPU:   SPEAr320\n");
+#elif defined(CONFIG_SPEAR600)
+	printf("CPU:   SPEAr600\n");
+#else
+#error CPU not supported in spear platform
+#endif
+	return 0;
+}
+#endif
+
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_NAND_ECC_BCH) && defined(CONFIG_NAND_FSMC)
+static int do_switch_ecc(cmd_tbl_t *cmdtp, int flag, int argc,
+			 char *const argv[])
+{
+	if (argc != 2)
+		goto usage;
+
+	if (strncmp(argv[1], "hw", 2) == 0) {
+		/* 1-bit HW ECC */
+		printf("Switching to 1-bit HW ECC\n");
+		fsmc_nand_switch_ecc(1);
+	} else if (strncmp(argv[1], "bch4", 2) == 0) {
+		/* 4-bit SW ECC BCH4 */
+		printf("Switching to 4-bit SW ECC (BCH4)\n");
+		fsmc_nand_switch_ecc(4);
+	} else {
+		goto usage;
+	}
+
+	return 0;
+
+usage:
+	printf("Usage: nandecc %s\n", cmdtp->usage);
+	return 1;
+}
+
+U_BOOT_CMD(
+	nandecc, 2, 0,	do_switch_ecc,
+	"switch NAND ECC calculation algorithm",
+	"hw|bch4 - Switch between NAND hardware 1-bit HW and"
+	" 4-bit SW BCH\n"
+);
+#endif