arc: add AXS101 board support

AXS101 is a new generation of devlopment boards from Synopsys that houses
ASIC with ARC700 and lots of DesignWare peripherals:

 * DW APB UART
 * DW Mobile Storage (MMC/SD)
 * DW I2C
 * DW GMAC

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Francois Bedard <fbedard@synopsys.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Heiko Schocher <hs@denx.de>

5 files changed, 460 insertions, 0 deletions

diff --git a/board/synopsys/axs101/Makefile b/board/synopsys/axs101/Makefile
new file mode 100644
index 0000000..f0965f7
--- /dev/null
+++ b/board/synopsys/axs101/Makefile
@@ -0,0 +1,8 @@
+#
+# Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= axs101.o
+obj-$(CONFIG_CMD_NAND) += nand.o
diff --git a/board/synopsys/axs101/axs101.c b/board/synopsys/axs101/axs101.c
new file mode 100644
index 0000000..4dbeaea
--- /dev/null
+++ b/board/synopsys/axs101/axs101.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dwmmc.h>
+#include <malloc.h>
+#include <netdev.h>
+#include <phy.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_mmc_init(bd_t *bis)
+{
+	struct dwmci_host *host = NULL;
+
+	host = malloc(sizeof(struct dwmci_host));
+	if (!host) {
+		printf("dwmci_host malloc fail!\n");
+		return 1;
+	}
+
+	memset(host, 0, sizeof(struct dwmci_host));
+	host->name = "Synopsys Mobile storage";
+	host->ioaddr = (void *)ARC_DWMMC_BASE;
+	host->buswidth = 4;
+	host->dev_index = 0;
+	host->bus_hz = 25000000;
+
+	add_dwmci(host, 52000000, 400000);
+
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	if (designware_initialize(0, ARC_DWGMAC_BASE, 0,
+				  PHY_INTERFACE_MODE_RGMII) >= 0)
+		return 1;
+
+	return 0;
+}
diff --git a/board/synopsys/axs101/nand.c b/board/synopsys/axs101/nand.c
new file mode 100644
index 0000000..8672803
--- /dev/null
+++ b/board/synopsys/axs101/nand.c
@@ -0,0 +1,226 @@
+/*
+ * 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;
+}
diff --git a/boards.cfg b/boards.cfg
index de39bfa..c97c4bd 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -1230,6 +1230,7 @@ Active  sparc       leon3          -           gaisler         -
 Active  sparc       leon3          -           gaisler         -                   gr_xc3s_1500                         -                                                                                                                                 -
 Active  sparc       leon3          -           gaisler         -                   grsim                                -                                                                                                                                 -
 Active  x86         x86            coreboot    chromebook-x86  coreboot            coreboot-x86                         coreboot:SYS_TEXT_BASE=0x01110000                                                                                                 -
+Active  arc         arc700         -           synopsys        -                   axs101                               -                                                                                                                                 Alexey Brodkin <abrodkin@synopsys.com>
 Active  arc         arc700         -           synopsys        -                   arcangel4                            -                                                                                                                                 Alexey Brodkin <abrodkin@synopsys.com>
 Active  arc         arc700         -           synopsys        arcangel4           arcangel4-be                            -                                                                                                                              Alexey Brodkin <abrodkin@synopsys.com>
 Orphan  arm         arm1136        mx31        -               imx31_phycore       imx31_phycore_eet                    imx31_phycore:IMX31_PHYCORE_EET                                                                                                   (resigned) Guennadi Liakhovetski <g.liakhovetski@gmx.de>
diff --git a/include/configs/axs101.h b/include/configs/axs101.h
new file mode 100644
index 0000000..af2e63b
--- /dev/null
+++ b/include/configs/axs101.h
@@ -0,0 +1,181 @@
+/*
+ * 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_ */