--- /dev/null
+/*
+ * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <bouncebuf.h>
+#include <common.h>
+#include <malloc.h>
+#include <nand.h>
+#include <asm/io.h>
+
+#define BUS_WIDTH 8 /* AXI data bus width in bytes */
+
+/* DMA buffer descriptor bits & masks */
+#define BD_STAT_OWN (1 << 31)
+#define BD_STAT_BD_FIRST (1 << 3)
+#define BD_STAT_BD_LAST (1 << 2)
+#define BD_SIZES_BUFFER1_MASK 0xfff
+
+#define BD_STAT_BD_COMPLETE (BD_STAT_BD_FIRST | BD_STAT_BD_LAST)
+
+/* Controller command flags */
+#define B_WFR (1 << 19) /* 1b - Wait for ready */
+#define B_LC (1 << 18) /* 1b - Last cycle */
+#define B_IWC (1 << 13) /* 1b - Interrupt when complete */
+
+/* NAND cycle types */
+#define B_CT_ADDRESS (0x0 << 16) /* Address operation */
+#define B_CT_COMMAND (0x1 << 16) /* Command operation */
+#define B_CT_WRITE (0x2 << 16) /* Write operation */
+#define B_CT_READ (0x3 << 16) /* Write operation */
+
+enum nand_isr_t {
+ NAND_ISR_DATAREQUIRED = 0,
+ NAND_ISR_TXUNDERFLOW,
+ NAND_ISR_TXOVERFLOW,
+ NAND_ISR_DATAAVAILABLE,
+ NAND_ISR_RXUNDERFLOW,
+ NAND_ISR_RXOVERFLOW,
+ NAND_ISR_TXDMACOMPLETE,
+ NAND_ISR_RXDMACOMPLETE,
+ NAND_ISR_DESCRIPTORUNAVAILABLE,
+ NAND_ISR_CMDDONE,
+ NAND_ISR_CMDAVAILABLE,
+ NAND_ISR_CMDERROR,
+ NAND_ISR_DATATRANSFEROVER,
+ NAND_ISR_NONE
+};
+
+enum nand_regs_t {
+ AC_FIFO = 0, /* address and command fifo */
+ IDMAC_BDADDR = 0x18, /* idmac descriptor list base address */
+ INT_STATUS = 0x118, /* interrupt status register */
+ INT_CLR_STATUS = 0x120, /* interrupt clear status register */
+};
+
+struct nand_bd {
+ uint32_t status; /* DES0 */
+ uint32_t sizes; /* DES1 */
+ uint32_t buffer_ptr0; /* DES2 */
+ uint32_t buffer_ptr1; /* DES3 */
+};
+
+#define NAND_REG_WRITE(r, v) writel(v, CONFIG_SYS_NAND_BASE + r)
+#define NAND_REG_READ(r) readl(CONFIG_SYS_NAND_BASE + r)
+
+static struct nand_bd *bd; /* DMA buffer descriptors */
+
+/**
+ * axs101_nand_write_buf - write buffer to chip
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ */
+static uint32_t nand_flag_is_set(uint32_t flag)
+{
+ uint32_t reg = NAND_REG_READ(INT_STATUS);
+
+ if (reg & (1 << NAND_ISR_CMDERROR))
+ return 0;
+
+ if (reg & (1 << flag)) {
+ NAND_REG_WRITE(INT_CLR_STATUS, 1 << flag);
+ return 1;
+ }
+
+ return 0;
+}
+
+/**
+ * axs101_nand_write_buf - write buffer to chip
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ */
+static void axs101_nand_write_buf(struct mtd_info *mtd, const u_char *buf,
+ int len)
+{
+ struct bounce_buffer bbstate;
+
+ bounce_buffer_start(&bbstate, (void *)buf, len, GEN_BB_READ);
+
+ /* Setup buffer descriptor */
+ writel(BD_STAT_OWN | BD_STAT_BD_COMPLETE, &bd->status);
+ writel(ALIGN(len, BUS_WIDTH) & BD_SIZES_BUFFER1_MASK, &bd->sizes);
+ writel(bbstate.bounce_buffer, &bd->buffer_ptr0);
+ writel(0, &bd->buffer_ptr1);
+
+ /* Issue "write" command */
+ NAND_REG_WRITE(AC_FIFO, B_CT_WRITE | B_WFR | B_IWC | B_LC | (len-1));
+
+ /* Wait for NAND command and DMA to complete */
+ while (!nand_flag_is_set(NAND_ISR_CMDDONE))
+ ;
+ while (!nand_flag_is_set(NAND_ISR_TXDMACOMPLETE))
+ ;
+
+ bounce_buffer_stop(&bbstate);
+}
+
+/**
+ * axs101_nand_read_buf - read chip data into buffer
+ * @mtd: MTD device structure
+ * @buf: buffer to store data
+ * @len: number of bytes to read
+ */
+static void axs101_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
+{
+ struct bounce_buffer bbstate;
+
+ bounce_buffer_start(&bbstate, buf, len, GEN_BB_WRITE);
+
+ /* Setup buffer descriptor */
+ writel(BD_STAT_OWN | BD_STAT_BD_COMPLETE, &bd->status);
+ writel(ALIGN(len, BUS_WIDTH) & BD_SIZES_BUFFER1_MASK, &bd->sizes);
+ writel(bbstate.bounce_buffer, &bd->buffer_ptr0);
+ writel(0, &bd->buffer_ptr1);
+
+ /* Issue "read" command */
+ NAND_REG_WRITE(AC_FIFO, B_CT_READ | B_WFR | B_IWC | B_LC | (len - 1));
+
+ /* Wait for NAND command and DMA to complete */
+ while (!nand_flag_is_set(NAND_ISR_CMDDONE))
+ ;
+ while (!nand_flag_is_set(NAND_ISR_RXDMACOMPLETE))
+ ;
+
+ bounce_buffer_stop(&bbstate);
+}
+
+/**
+ * axs101_nand_read_byte - read one byte from the chip
+ * @mtd: MTD device structure
+ */
+static u_char axs101_nand_read_byte(struct mtd_info *mtd)
+{
+ u8 byte;
+
+ axs101_nand_read_buf(mtd, (uchar *)&byte, sizeof(byte));
+ return byte;
+}
+
+/**
+ * axs101_nand_read_word - read one word from the chip
+ * @mtd: MTD device structure
+ */
+static u16 axs101_nand_read_word(struct mtd_info *mtd)
+{
+ u16 word;
+
+ axs101_nand_read_buf(mtd, (uchar *)&word, sizeof(word));
+ return word;
+}
+
+/**
+ * axs101_nand_hwcontrol - NAND control functions wrapper.
+ * @mtd: MTD device structure
+ * @cmd: Command
+ */
+static void axs101_nand_hwcontrol(struct mtd_info *mtdinfo, int cmd,
+ unsigned int ctrl)
+{
+ if (cmd == NAND_CMD_NONE)
+ return;
+
+ cmd = cmd & 0xff;
+
+ switch (ctrl & (NAND_ALE | NAND_CLE)) {
+ /* Address */
+ case NAND_ALE:
+ cmd |= B_CT_ADDRESS;
+ break;
+
+ /* Command */
+ case NAND_CLE:
+ cmd |= B_CT_COMMAND | B_WFR;
+
+ break;
+
+ default:
+ debug("%s: unknown ctrl %#x\n", __func__, ctrl);
+ }
+
+ NAND_REG_WRITE(AC_FIFO, cmd | B_LC);
+ while (!nand_flag_is_set(NAND_ISR_CMDDONE))
+ ;
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+ bd = (struct nand_bd *)memalign(ARCH_DMA_MINALIGN,
+ sizeof(struct nand_bd));
+
+ /* Set buffer descriptor address in IDMAC */
+ NAND_REG_WRITE(IDMAC_BDADDR, bd);
+
+ nand->ecc.mode = NAND_ECC_SOFT;
+ nand->cmd_ctrl = axs101_nand_hwcontrol;
+ nand->read_byte = axs101_nand_read_byte;
+ nand->read_word = axs101_nand_read_word;
+ nand->write_buf = axs101_nand_write_buf;
+ nand->read_buf = axs101_nand_read_buf;
+
+ return 0;
+}
--- /dev/null
+/*
+ * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _CONFIG_AXS101_H_
+#define _CONFIG_AXS101_H_
+
+/*
+ * CPU configuration
+ */
+#define CONFIG_ARC700
+#define CONFIG_ARC_MMU_VER 3
+#define CONFIG_SYS_CACHELINE_SIZE 32
+#define CONFIG_SYS_CLK_FREQ 750000000
+#define CONFIG_SYS_TIMER_RATE CONFIG_SYS_CLK_FREQ
+
+/* dwgmac doesn't work with D$ enabled now */
+#define CONFIG_SYS_DCACHE_OFF
+
+/*
+ * Board configuration
+ */
+#define CONFIG_SYS_GENERIC_BOARD
+#define CONFIG_SKIP_LOWLEVEL_INIT /* U-Boot is in RAM already */
+
+#define CONFIG_ARCH_EARLY_INIT_R
+
+#define ARC_FPGA_PERIPHERAL_BASE 0xE0000000
+#define ARC_APB_PERIPHERAL_BASE 0xF0000000
+#define ARC_DWMMC_BASE (ARC_FPGA_PERIPHERAL_BASE + 0x15000)
+#define ARC_DWGMAC_BASE (ARC_FPGA_PERIPHERAL_BASE + 0x18000)
+
+/*
+ * Memory configuration
+ */
+#define CONFIG_SYS_TEXT_BASE 0x81000000
+#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_TEXT_BASE
+
+#define CONFIG_SYS_DDR_SDRAM_BASE 0x80000000
+#define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_SDRAM_BASE
+#define CONFIG_SYS_SDRAM_SIZE 0x10000000 /* 256 Mb */
+
+#define CONFIG_SYS_INIT_SP_ADDR \
+ (CONFIG_SYS_SDRAM_BASE + 0x1000 - GENERATED_GBL_DATA_SIZE)
+
+#define CONFIG_SYS_MALLOC_LEN 0x200000 /* 2 MB */
+#define CONFIG_SYS_BOOTM_LEN 0x2000000 /* 32 MB */
+#define CONFIG_SYS_LOAD_ADDR 0x82000000
+
+/*
+ * NAND Flash configuration
+ */
+#define CONFIG_SYS_NO_FLASH
+#define CONFIG_SYS_NAND_BASE (ARC_FPGA_PERIPHERAL_BASE + 0x16000)
+#define CONFIG_SYS_MAX_NAND_DEVICE 1
+
+/*
+ * UART configuration
+ *
+ * CONFIG_CONS_INDEX = 1 - Debug UART
+ * CONFIG_CONS_INDEX = 4 - FPGA UART connected to FTDI/USB
+ */
+#define CONFIG_CONS_INDEX 4
+#define CONFIG_SYS_NS16550
+#define CONFIG_SYS_NS16550_SERIAL
+#define CONFIG_SYS_NS16550_REG_SIZE -4
+#if (CONFIG_CONS_INDEX == 1)
+ /* Debug UART */
+# define CONFIG_SYS_NS16550_CLK 33333000
+#else
+ /* FPGA UARTs use different clock */
+# define CONFIG_SYS_NS16550_CLK 33333333
+#endif
+#define CONFIG_SYS_NS16550_COM1 (ARC_APB_PERIPHERAL_BASE + 0x5000)
+#define CONFIG_SYS_NS16550_COM2 (ARC_FPGA_PERIPHERAL_BASE + 0x20000)
+#define CONFIG_SYS_NS16550_COM3 (ARC_FPGA_PERIPHERAL_BASE + 0x21000)
+#define CONFIG_SYS_NS16550_COM4 (ARC_FPGA_PERIPHERAL_BASE + 0x22000)
+#define CONFIG_SYS_NS16550_MEM32
+
+#define CONFIG_BAUDRATE 115200
+/*
+ * I2C configuration
+ */
+#define CONFIG_HARD_I2C
+#define CONFIG_DW_I2C
+#define CONFIG_I2C_MULTI_BUS
+#define CONFIG_I2C_ENV_EEPROM_BUS 2
+#define CONFIG_SYS_I2C_SPEED 100000
+#define CONFIG_SYS_I2C_SLAVE 0
+#define CONFIG_SYS_I2C_BASE 0xE001D000
+#define CONFIG_SYS_I2C_BASE1 0xE001E000
+#define CONFIG_SYS_I2C_BASE2 0xE001F000
+#define CONFIG_SYS_I2C_BUS_MAX 3
+#define IC_CLK 50
+
+/*
+ * EEPROM configuration
+ */
+#define CONFIG_SYS_I2C_MULTI_EEPROMS
+#define CONFIG_SYS_I2C_EEPROM_ADDR (0xA8 >> 1)
+#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
+#define CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW 1
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 3
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 32
+
+/*
+ * SD/MMC configuration
+ */
+#define CONFIG_MMC
+#define CONFIG_GENERIC_MMC
+#define CONFIG_DWMMC
+#define CONFIG_DOS_PARTITION
+
+/*
+ * Ethernet PHY configuration
+ */
+#define CONFIG_PHYLIB
+#define CONFIG_MII
+#define CONFIG_PHY_GIGE
+
+/*
+ * Ethernet configuration
+ */
+#define CONFIG_DESIGNWARE_ETH
+#define CONFIG_DW_AUTONEG
+#define CONFIG_DW_SEARCH_PHY
+#define CONFIG_NET_MULTI
+
+/*
+ * Command line configuration
+ */
+#include <config_cmd_default.h>
+
+#define CONFIG_CMD_DHCP
+#define CONFIG_CMD_EEPROM
+#define CONFIG_CMD_ELF
+#define CONFIG_CMD_FAT
+#define CONFIG_CMD_I2C
+#define CONFIG_CMD_MMC
+#define CONFIG_CMD_NAND
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_RARP
+
+#define CONFIG_OF_LIBFDT
+
+#define CONFIG_AUTO_COMPLETE
+#define CONFIG_SYS_MAXARGS 16
+
+/*
+ * Environment settings
+ */
+#define CONFIG_ENV_IS_IN_EEPROM
+#define CONFIG_ENV_SIZE 0x00200 /* 512 bytes */
+#define CONFIG_ENV_OFFSET 0
+
+/*
+ * Environment configuration
+ */
+#define CONFIG_BOOTDELAY 3
+#define CONFIG_BOOTFILE "uImage"
+#define CONFIG_BOOTARGS "console=ttyS3,115200n8"
+#define CONFIG_LOADADDR CONFIG_SYS_LOAD_ADDR
+
+/*
+ * Console configuration
+ */
+#define CONFIG_SYS_LONGHELP
+#define CONFIG_SYS_PROMPT "axs# "
+#define CONFIG_SYS_CBSIZE 256
+#define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE
+#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \
+ sizeof(CONFIG_SYS_PROMPT) + 16)
+
+/*
+ * Misc utility configuration
+ */
+#define CONFIG_BOUNCE_BUFFER
+
+#endif /* _CONFIG_AXS101_H_ */
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