arch/arm/mach-imx/mach-qong.c - kernel/bruno - Git at Google

 /*
  *  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.
  */

 #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 <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
 #include <asm/mach/map.h>
 #include <asm/page.h>
 #include <asm/setup.h>

 #include "common.h"
 #include "devices-imx31.h"
 #include "hardware.h"
 #include "iomux-mx3.h"

 /* FPGA defines */
 #define QONG_FPGA_VERSION(major, minor, rev)	\
 	(((major & 0xF) << 12) | ((minor & 0xF) << 8) | (rev & 0xFF))

 #define QONG_FPGA_BASEADDR		MX31_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

 static const struct imxuart_platform_data uart_pdata __initconst = {
 	.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 __init mxc_init_imx_uart(void)
 {
 	mxc_iomux_setup_multiple_pins(uart_pins, ARRAY_SIZE(uart_pins),
 			"uart-0");
 	imx31_add_imx_uart0(&uart_pdata);
 }

 static struct resource dnet_resources[] = {
 	{
 		.name	= "dnet-memory",
 		.start	= QONG_DNET_BASEADDR,
 		.end	= QONG_DNET_BASEADDR + QONG_DNET_SIZE - 1,
 		.flags	= IORESOURCE_MEM,
 	}, {
 		/* irq number is run-time assigned */
 		.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;

 	dnet_resources[1].start =
 		gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1));
 	dnet_resources[1].end =
 		gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1));
 	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 = MX31_CS0_BASE_ADDR,
 	.end = MX31_CS0_BASE_ADDR + SZ_128M - 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 = {
 		.nr_chips		= 1,
 		.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		= MX31_CS3_BASE_ADDR,
 	.end		= MX31_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, MX31_IO_ADDRESS(MX31_WEIM_CSCRxU(3)));
 	__raw_writel(0x20013b31, MX31_IO_ADDRESS(MX31_WEIM_CSCRxL(3)));
 	__raw_writel(0x00020800, MX31_IO_ADDRESS(MX31_WEIM_CSCRxA(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();
 }

 /*
  * Board specific initialization.
  */
 static void __init qong_init(void)
 {
 	imx31_soc_init();

 	mxc_init_imx_uart();
 	qong_init_nor_mtd();
 	qong_init_fpga();
 	imx31_add_imx2_wdt();
 }

 static void __init qong_timer_init(void)
 {
 	mx31_clocks_init(26000000);
 }

 MACHINE_START(QONG, "Dave/DENX QongEVB-LITE")
 	/* Maintainer: DENX Software Engineering GmbH */
 	.atag_offset = 0x100,
 	.map_io = mx31_map_io,
 	.init_early = imx31_init_early,
 	.init_irq = mx31_init_irq,
 	.init_time	= qong_timer_init,
 	.init_machine = qong_init,
 	.restart	= mxc_restart,
 MACHINE_END
	/*
	* 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.
	*/

	#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 <asm/mach-types.h>
	#include <asm/mach/arch.h>
	#include <asm/mach/time.h>
	#include <asm/mach/map.h>
	#include <asm/page.h>
	#include <asm/setup.h>

	#include "common.h"
	#include "devices-imx31.h"
	#include "hardware.h"
	#include "iomux-mx3.h"

	/* FPGA defines */
	#define QONG_FPGA_VERSION(major, minor, rev) \
	(((major & 0xF) << 12) \| ((minor & 0xF) << 8) \| (rev & 0xFF))

	#define QONG_FPGA_BASEADDR MX31_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

	static const struct imxuart_platform_data uart_pdata __initconst = {
	.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 __init mxc_init_imx_uart(void)
	{
	mxc_iomux_setup_multiple_pins(uart_pins, ARRAY_SIZE(uart_pins),
	"uart-0");
	imx31_add_imx_uart0(&uart_pdata);
	}

	static struct resource dnet_resources[] = {
	{
	.name = "dnet-memory",
	.start = QONG_DNET_BASEADDR,
	.end = QONG_DNET_BASEADDR + QONG_DNET_SIZE - 1,
	.flags = IORESOURCE_MEM,
	}, {
	/* irq number is run-time assigned */
	.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;

	dnet_resources[1].start =
	gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1));
	dnet_resources[1].end =
	gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1));
	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 = MX31_CS0_BASE_ADDR,
	.end = MX31_CS0_BASE_ADDR + SZ_128M - 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 = {
	.nr_chips = 1,
	.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 = MX31_CS3_BASE_ADDR,
	.end = MX31_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, MX31_IO_ADDRESS(MX31_WEIM_CSCRxU(3)));
	__raw_writel(0x20013b31, MX31_IO_ADDRESS(MX31_WEIM_CSCRxL(3)));
	__raw_writel(0x00020800, MX31_IO_ADDRESS(MX31_WEIM_CSCRxA(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();
	}

	/*
	* Board specific initialization.
	*/
	static void __init qong_init(void)
	{
	imx31_soc_init();

	mxc_init_imx_uart();
	qong_init_nor_mtd();
	qong_init_fpga();
	imx31_add_imx2_wdt();
	}

	static void __init qong_timer_init(void)
	{
	mx31_clocks_init(26000000);
	}

	MACHINE_START(QONG, "Dave/DENX QongEVB-LITE")
	/* Maintainer: DENX Software Engineering GmbH */
	.atag_offset = 0x100,
	.map_io = mx31_map_io,
	.init_early = imx31_init_early,
	.init_irq = mx31_init_irq,
	.init_time = qong_timer_init,
	.init_machine = qong_init,
	.restart = mxc_restart,
	MACHINE_END