qong: basic support for Dave/DENX QongEVB-LITE board

This patch adds basic support for Dave/DENX QongEVB-LITE i.MX31-based
board. It includes support for clocks initialization, UART1, NOR-flash,
FPGA-attached NAND flash and DNET ethernet controller (inside FPGA).

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 321 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/Kconfig b/arch/arm/mach-mx3/Kconfig
index 7c939c6..d623558 100644
--- a/arch/arm/mach-mx3/Kconfig
+++ b/arch/arm/mach-mx3/Kconfig
@@ -56,4 +56,12 @@ config MACH_MX31MOBOARD
 	  Include support for mx31moboard platform. This includes specific
 	  configurations for the board and its peripherals.
 
+config MACH_QONG
+	bool "Support Dave/DENX QongEVB-LITE platform"
+	select ARCH_MX31
+	default n
+	help
+	  Include support for Dave/DENX QongEVB-LITE platform. This includes
+	  specific configurations for the board and its peripherals.
+
 endif
diff --git a/arch/arm/mach-mx3/Makefile b/arch/arm/mach-mx3/Makefile
index ab0bec0..272c8a9 100644
--- a/arch/arm/mach-mx3/Makefile
+++ b/arch/arm/mach-mx3/Makefile
@@ -13,3 +13,4 @@ obj-$(CONFIG_MACH_PCM037)	+= pcm037.o
 obj-$(CONFIG_MACH_MX31_3DS)	+= mx31pdk.o
 obj-$(CONFIG_MACH_MX31MOBOARD)	+= mx31moboard.o mx31moboard-devboard.o \
 				   mx31moboard-marxbot.o
+obj-$(CONFIG_MACH_QONG)		+= qong.o
diff --git a/arch/arm/mach-mx3/qong.c b/arch/arm/mach-mx3/qong.c
new file mode 100644
index 0000000..6c4283c
--- /dev/null
+++ b/arch/arm/mach-mx3/qong.c
@@ -0,0 +1,312 @@
+/*
+ *  Copyright (C) 2009 Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/memory.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/physmap.h>
+#include <linux/mtd/nand.h>
+#include <linux/gpio.h>
+
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/mach/map.h>
+#include <mach/common.h>
+#include <asm/page.h>
+#include <asm/setup.h>
+#include <mach/board-qong.h>
+#include <mach/imx-uart.h>
+#include <mach/iomux-mx3.h>
+#include "devices.h"
+
+/* FPGA defines */
+#define QONG_FPGA_VERSION(major, minor, rev)	\
+	(((major & 0xF) << 12) | ((minor & 0xF) << 8) | (rev & 0xFF))
+
+#define QONG_FPGA_BASEADDR 		CS1_BASE_ADDR
+#define QONG_FPGA_PERIPH_SIZE 		(1 << 24)
+
+#define QONG_FPGA_CTRL_BASEADDR		QONG_FPGA_BASEADDR
+#define QONG_FPGA_CTRL_SIZE 		0x10
+/* FPGA control registers */
+#define QONG_FPGA_CTRL_VERSION		0x00
+
+#define QONG_DNET_ID		1
+#define QONG_DNET_BASEADDR	\
+	(QONG_FPGA_BASEADDR + QONG_DNET_ID * QONG_FPGA_PERIPH_SIZE)
+#define QONG_DNET_SIZE 		0x00001000
+
+#define QONG_FPGA_IRQ		IOMUX_TO_IRQ(MX31_PIN_DTR_DCE1)
+
+/*
+ * This file contains the board-specific initialization routines.
+ */
+
+static struct imxuart_platform_data uart_pdata = {
+	.flags = IMXUART_HAVE_RTSCTS,
+};
+
+static int uart_pins[] = {
+	MX31_PIN_CTS1__CTS1,
+	MX31_PIN_RTS1__RTS1,
+	MX31_PIN_TXD1__TXD1,
+	MX31_PIN_RXD1__RXD1
+};
+
+static inline void mxc_init_imx_uart(void)
+{
+	mxc_iomux_setup_multiple_pins(uart_pins, ARRAY_SIZE(uart_pins),
+			"uart-0");
+	mxc_register_device(&mxc_uart_device0, &uart_pdata);
+}
+
+static struct resource dnet_resources[] = {
+	[0] = {
+		.name	= "dnet-memory",
+		.start	= QONG_DNET_BASEADDR,
+		.end	= QONG_DNET_BASEADDR + QONG_DNET_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= QONG_FPGA_IRQ,
+		.end	= QONG_FPGA_IRQ,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device dnet_device = {
+	.name			= "dnet",
+	.id			= -1,
+	.num_resources		= ARRAY_SIZE(dnet_resources),
+	.resource		= dnet_resources,
+};
+
+static int __init qong_init_dnet(void)
+{
+	int ret;
+
+	ret = platform_device_register(&dnet_device);
+	return ret;
+}
+
+/* MTD NOR flash */
+
+static struct physmap_flash_data qong_flash_data = {
+	.width = 2,
+};
+
+static struct resource qong_flash_resource = {
+	.start = CS0_BASE_ADDR,
+	.end = CS0_BASE_ADDR + QONG_NOR_SIZE - 1,
+	.flags = IORESOURCE_MEM,
+};
+
+static struct platform_device qong_nor_mtd_device = {
+	.name = "physmap-flash",
+	.id = 0,
+	.dev = {
+		.platform_data = &qong_flash_data,
+		},
+	.resource = &qong_flash_resource,
+	.num_resources = 1,
+};
+
+static void qong_init_nor_mtd(void)
+{
+	(void)platform_device_register(&qong_nor_mtd_device);
+}
+
+/*
+ * Hardware specific access to control-lines
+ */
+static void qong_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+	struct nand_chip *nand_chip = mtd->priv;
+
+	if (cmd == NAND_CMD_NONE)
+		return;
+
+	if (ctrl & NAND_CLE)
+		writeb(cmd, nand_chip->IO_ADDR_W + (1 << 24));
+	else
+		writeb(cmd, nand_chip->IO_ADDR_W + (1 << 23));
+}
+
+/*
+ * Read the Device Ready pin.
+ */
+static int qong_nand_device_ready(struct mtd_info *mtd)
+{
+	return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_NFRB));
+}
+
+static void qong_nand_select_chip(struct mtd_info *mtd, int chip)
+{
+	if (chip >= 0)
+		gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
+	else
+		gpio_set_value(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 1);
+}
+
+static struct platform_nand_data qong_nand_data = {
+	.chip = {
+		.chip_delay		= 20,
+		.options		= 0,
+	},
+	.ctrl = {
+		.cmd_ctrl 		= qong_nand_cmd_ctrl,
+		.dev_ready		= qong_nand_device_ready,
+		.select_chip		= qong_nand_select_chip,
+	}
+};
+
+static struct resource qong_nand_resource = {
+	.start  	= CS3_BASE_ADDR,
+	.end    	= CS3_BASE_ADDR + SZ_32M - 1,
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device qong_nand_device = {
+	.name		= "gen_nand",
+	.id		= -1,
+	.dev		= {
+		.platform_data = &qong_nand_data,
+	},
+	.num_resources	= 1,
+	.resource	= &qong_nand_resource,
+};
+
+static void __init qong_init_nand_mtd(void)
+{
+	/* init CS */
+	__raw_writel(0x00004f00, CSCR_U(3));
+	__raw_writel(0x20013b31, CSCR_L(3));
+	__raw_writel(0x00020800, CSCR_A(3));
+	mxc_iomux_set_gpr(MUX_SDCTL_CSD1_SEL, true);
+
+	/* enable pin */
+	mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFCE_B, IOMUX_CONFIG_GPIO));
+	if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), "nand_enable"))
+		gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_NFCE_B), 0);
+
+	/* ready/busy pin */
+	mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFRB, IOMUX_CONFIG_GPIO));
+	if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFRB), "nand_rdy"))
+		gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFRB));
+
+	/* write protect pin */
+	mxc_iomux_mode(IOMUX_MODE(MX31_PIN_NFWP_B, IOMUX_CONFIG_GPIO));
+	if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_NFWP_B), "nand_wp"))
+		gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_NFWP_B));
+
+	platform_device_register(&qong_nand_device);
+}
+
+static void __init qong_init_fpga(void)
+{
+	void __iomem *regs;
+	u32 fpga_ver;
+
+	regs = ioremap(QONG_FPGA_CTRL_BASEADDR, QONG_FPGA_CTRL_SIZE);
+	if (!regs) {
+		printk(KERN_ERR "%s: failed to map registers, aborting.\n",
+				__func__);
+		return;
+	}
+
+	fpga_ver = readl(regs + QONG_FPGA_CTRL_VERSION);
+	iounmap(regs);
+	printk(KERN_INFO "Qong FPGA version %d.%d.%d\n",
+			(fpga_ver & 0xF000) >> 12,
+			(fpga_ver & 0x0F00) >> 8, fpga_ver & 0x00FF);
+	if (fpga_ver < QONG_FPGA_VERSION(0, 8, 7)) {
+		printk(KERN_ERR "qong: Unexpected FPGA version, FPGA-based "
+				"devices won't be registered!\n");
+		return;
+	}
+
+	/* register FPGA-based devices */
+	qong_init_nand_mtd();
+	qong_init_dnet();
+}
+
+/*
+ * This structure defines the MX31 memory map.
+ */
+static struct map_desc qong_io_desc[] __initdata = {
+	{
+		.virtual = AIPS1_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(AIPS1_BASE_ADDR),
+		.length = AIPS1_SIZE,
+		.type = MT_DEVICE_NONSHARED
+	}, {
+		.virtual = AIPS2_BASE_ADDR_VIRT,
+		.pfn = __phys_to_pfn(AIPS2_BASE_ADDR),
+		.length = AIPS2_SIZE,
+		.type = MT_DEVICE_NONSHARED
+	}
+};
+
+/*
+ * Set up static virtual mappings.
+ */
+static void __init qong_map_io(void)
+{
+	mxc_map_io();
+	iotable_init(qong_io_desc, ARRAY_SIZE(qong_io_desc));
+}
+
+/*
+ * Board specific initialization.
+ */
+static void __init mxc_board_init(void)
+{
+	mxc_init_imx_uart();
+	qong_init_nor_mtd();
+	qong_init_fpga();
+}
+
+static void __init qong_timer_init(void)
+{
+	mx31_clocks_init(26000000);
+}
+
+static struct sys_timer qong_timer = {
+	.init	= qong_timer_init,
+};
+
+/*
+ * The following uses standard kernel macros defined in arch.h in order to
+ * initialize __mach_desc_QONG data structure.
+ */
+
+MACHINE_START(QONG, "Dave/DENX QongEVB-LITE")
+	/* Maintainer: DENX Software Engineering GmbH */
+	.phys_io        = AIPS1_BASE_ADDR,
+	.io_pg_offst    = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
+	.boot_params    = PHYS_OFFSET + 0x100,
+	.map_io         = qong_map_io,
+	.init_irq       = mxc_init_irq,
+	.init_machine   = mxc_board_init,
+	.timer          = &qong_timer,
+MACHINE_END