arch/arm/mach-mx3/mx31pdk.c - kernel/prism - Git at Google

 /*
  *  Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
  *
  * 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/clk.h>
 #include <linux/irq.h>
 #include <linux/gpio.h>
 #include <linux/smsc911x.h>
 #include <linux/platform_device.h>

 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
 #include <asm/memory.h>
 #include <asm/mach/map.h>
 #include <mach/common.h>
 #include <mach/board-mx31pdk.h>
 #include <mach/imx-uart.h>
 #include <mach/iomux-mx3.h>
 #include "devices.h"

 /*!
  * @file mx31pdk.c
  *
  * @brief This file contains the board-specific initialization routines.
  *
  * @ingroup System
  */

 static int mx31pdk_pins[] = {
 	/* UART1 */
 	MX31_PIN_CTS1__CTS1,
 	MX31_PIN_RTS1__RTS1,
 	MX31_PIN_TXD1__TXD1,
 	MX31_PIN_RXD1__RXD1,
 	IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO),
 };

 static struct imxuart_platform_data uart_pdata = {
 	.flags = IMXUART_HAVE_RTSCTS,
 };

 /*
  * Support for the SMSC9217 on the Debug board.
  */

 static struct smsc911x_platform_config smsc911x_config = {
 	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
 	.irq_type	= SMSC911X_IRQ_TYPE_PUSH_PULL,
 	.flags		= SMSC911X_USE_16BIT | SMSC911X_FORCE_INTERNAL_PHY,
 	.phy_interface	= PHY_INTERFACE_MODE_MII,
 };

 static struct resource smsc911x_resources[] = {
 	{
 		.start		= LAN9217_BASE_ADDR,
 		.end		= LAN9217_BASE_ADDR + 0xff,
 		.flags		= IORESOURCE_MEM,
 	}, {
 		.start		= EXPIO_INT_ENET,
 		.end		= EXPIO_INT_ENET,
 		.flags		= IORESOURCE_IRQ,
 	},
 };

 static struct platform_device smsc911x_device = {
 	.name		= "smsc911x",
 	.id		= -1,
 	.num_resources	= ARRAY_SIZE(smsc911x_resources),
 	.resource	= smsc911x_resources,
 	.dev		= {
 		.platform_data = &smsc911x_config,
 	},
 };

 /*
  * Routines for the CPLD on the debug board. It contains a CPLD handling
  * LEDs, switches, interrupts for Ethernet.
  */

 static void mx31pdk_expio_irq_handler(uint32_t irq, struct irq_desc *desc)
 {
 	uint32_t imr_val;
 	uint32_t int_valid;
 	uint32_t expio_irq;

 	imr_val = __raw_readw(CPLD_INT_MASK_REG);
 	int_valid = __raw_readw(CPLD_INT_STATUS_REG) & ~imr_val;

 	expio_irq = MXC_EXP_IO_BASE;
 	for (; int_valid != 0; int_valid >>= 1, expio_irq++) {
 		if ((int_valid & 1) == 0)
 			continue;
 		generic_handle_irq(expio_irq);
 	}
 }

 /*
  * Disable an expio pin's interrupt by setting the bit in the imr.
  * @param irq           an expio virtual irq number
  */
 static void expio_mask_irq(uint32_t irq)
 {
 	uint16_t reg;
 	uint32_t expio = MXC_IRQ_TO_EXPIO(irq);

 	/* mask the interrupt */
 	reg = __raw_readw(CPLD_INT_MASK_REG);
 	reg |= 1 << expio;
 	__raw_writew(reg, CPLD_INT_MASK_REG);
 }

 /*
  * Acknowledge an expanded io pin's interrupt by clearing the bit in the isr.
  * @param irq           an expanded io virtual irq number
  */
 static void expio_ack_irq(uint32_t irq)
 {
 	uint32_t expio = MXC_IRQ_TO_EXPIO(irq);

 	/* clear the interrupt status */
 	__raw_writew(1 << expio, CPLD_INT_RESET_REG);
 	__raw_writew(0, CPLD_INT_RESET_REG);
 	/* mask the interrupt */
 	expio_mask_irq(irq);
 }

 /*
  * Enable a expio pin's interrupt by clearing the bit in the imr.
  * @param irq           a expio virtual irq number
  */
 static void expio_unmask_irq(uint32_t irq)
 {
 	uint16_t reg;
 	uint32_t expio = MXC_IRQ_TO_EXPIO(irq);

 	/* unmask the interrupt */
 	reg = __raw_readw(CPLD_INT_MASK_REG);
 	reg &= ~(1 << expio);
 	__raw_writew(reg, CPLD_INT_MASK_REG);
 }

 static struct irq_chip expio_irq_chip = {
 	.ack = expio_ack_irq,
 	.mask = expio_mask_irq,
 	.unmask = expio_unmask_irq,
 };

 static int __init mx31pdk_init_expio(void)
 {
 	int i;
 	int ret;

 	/* Check if there's a debug board connected */
 	if ((__raw_readw(CPLD_MAGIC_NUMBER1_REG) != 0xAAAA) ||
 	    (__raw_readw(CPLD_MAGIC_NUMBER2_REG) != 0x5555) ||
 	    (__raw_readw(CPLD_MAGIC_NUMBER3_REG) != 0xCAFE)) {
 		/* No Debug board found */
 		return -ENODEV;
 	}

 	pr_info("i.MX31PDK Debug board detected, rev = 0x%04X\n",
 		__raw_readw(CPLD_CODE_VER_REG));

 	/*
 	 * Configure INT line as GPIO input
 	 */
 	ret = gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "sms9217-irq");
 	if (ret)
 		pr_warning("could not get LAN irq gpio\n");
 	else
 		gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));

 	/* Disable the interrupts and clear the status */
 	__raw_writew(0, CPLD_INT_MASK_REG);
 	__raw_writew(0xFFFF, CPLD_INT_RESET_REG);
 	__raw_writew(0, CPLD_INT_RESET_REG);
 	__raw_writew(0x1F, CPLD_INT_MASK_REG);
 	for (i = MXC_EXP_IO_BASE;
 	     i < (MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES);
 	     i++) {
 		set_irq_chip(i, &expio_irq_chip);
 		set_irq_handler(i, handle_level_irq);
 		set_irq_flags(i, IRQF_VALID);
 	}
 	set_irq_type(EXPIO_PARENT_INT, IRQ_TYPE_LEVEL_LOW);
 	set_irq_chained_handler(EXPIO_PARENT_INT, mx31pdk_expio_irq_handler);

 	return 0;
 }

 /*
  * This structure defines the MX31 memory map.
  */
 static struct map_desc mx31pdk_io_desc[] __initdata = {
 	{
 		.virtual = SPBA0_BASE_ADDR_VIRT,
 		.pfn = __phys_to_pfn(SPBA0_BASE_ADDR),
 		.length = SPBA0_SIZE,
 		.type = MT_DEVICE_NONSHARED,
 	}, {
 		.virtual = CS5_BASE_ADDR_VIRT,
 		.pfn = __phys_to_pfn(CS5_BASE_ADDR),
 		.length = CS5_SIZE,
 		.type = MT_DEVICE,
 	},
 };

 /*
  * Set up static virtual mappings.
  */
 static void __init mx31pdk_map_io(void)
 {
 	mx31_map_io();
 	iotable_init(mx31pdk_io_desc, ARRAY_SIZE(mx31pdk_io_desc));
 }

 /*!
  * Board specific initialization.
  */
 static void __init mxc_board_init(void)
 {
 	mxc_iomux_setup_multiple_pins(mx31pdk_pins, ARRAY_SIZE(mx31pdk_pins),
 				      "mx31pdk");

 	mxc_register_device(&mxc_uart_device0, &uart_pdata);

 	if (!mx31pdk_init_expio())
 		platform_device_register(&smsc911x_device);
 }

 static void __init mx31pdk_timer_init(void)
 {
 	mx31_clocks_init(26000000);
 }

 static struct sys_timer mx31pdk_timer = {
 	.init	= mx31pdk_timer_init,
 };

 /*
  * The following uses standard kernel macros defined in arch.h in order to
  * initialize __mach_desc_MX31PDK data structure.
  */
 MACHINE_START(MX31_3DS, "Freescale MX31PDK (3DS)")
 	/* Maintainer: Freescale Semiconductor, Inc. */
 	.phys_io	= AIPS1_BASE_ADDR,
 	.io_pg_offst	= ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
 	.boot_params    = PHYS_OFFSET + 0x100,
 	.map_io         = mx31pdk_map_io,
 	.init_irq       = mx31_init_irq,
 	.init_machine   = mxc_board_init,
 	.timer          = &mx31pdk_timer,
 MACHINE_END
	/*
	* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
	*
	* 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/clk.h>
	#include <linux/irq.h>
	#include <linux/gpio.h>
	#include <linux/smsc911x.h>
	#include <linux/platform_device.h>

	#include <mach/hardware.h>
	#include <asm/mach-types.h>
	#include <asm/mach/arch.h>
	#include <asm/mach/time.h>
	#include <asm/memory.h>
	#include <asm/mach/map.h>
	#include <mach/common.h>
	#include <mach/board-mx31pdk.h>
	#include <mach/imx-uart.h>
	#include <mach/iomux-mx3.h>
	#include "devices.h"

	/*!
	* @file mx31pdk.c
	*
	* @brief This file contains the board-specific initialization routines.
	*
	* @ingroup System
	*/

	static int mx31pdk_pins[] = {
	/* UART1 */
	MX31_PIN_CTS1__CTS1,
	MX31_PIN_RTS1__RTS1,
	MX31_PIN_TXD1__TXD1,
	MX31_PIN_RXD1__RXD1,
	IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO),
	};

	static struct imxuart_platform_data uart_pdata = {
	.flags = IMXUART_HAVE_RTSCTS,
	};

	/*
	* Support for the SMSC9217 on the Debug board.
	*/

	static struct smsc911x_platform_config smsc911x_config = {
	.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
	.irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL,
	.flags = SMSC911X_USE_16BIT \| SMSC911X_FORCE_INTERNAL_PHY,
	.phy_interface = PHY_INTERFACE_MODE_MII,
	};

	static struct resource smsc911x_resources[] = {
	{
	.start = LAN9217_BASE_ADDR,
	.end = LAN9217_BASE_ADDR + 0xff,
	.flags = IORESOURCE_MEM,
	}, {
	.start = EXPIO_INT_ENET,
	.end = EXPIO_INT_ENET,
	.flags = IORESOURCE_IRQ,
	},
	};

	static struct platform_device smsc911x_device = {
	.name = "smsc911x",
	.id = -1,
	.num_resources = ARRAY_SIZE(smsc911x_resources),
	.resource = smsc911x_resources,
	.dev = {
	.platform_data = &smsc911x_config,
	},
	};

	/*
	* Routines for the CPLD on the debug board. It contains a CPLD handling
	* LEDs, switches, interrupts for Ethernet.
	*/

	static void mx31pdk_expio_irq_handler(uint32_t irq, struct irq_desc *desc)
	{
	uint32_t imr_val;
	uint32_t int_valid;
	uint32_t expio_irq;

	imr_val = __raw_readw(CPLD_INT_MASK_REG);
	int_valid = __raw_readw(CPLD_INT_STATUS_REG) & ~imr_val;

	expio_irq = MXC_EXP_IO_BASE;
	for (; int_valid != 0; int_valid >>= 1, expio_irq++) {
	if ((int_valid & 1) == 0)
	continue;
	generic_handle_irq(expio_irq);
	}
	}

	/*
	* Disable an expio pin's interrupt by setting the bit in the imr.
	* @param irq an expio virtual irq number
	*/
	static void expio_mask_irq(uint32_t irq)
	{
	uint16_t reg;
	uint32_t expio = MXC_IRQ_TO_EXPIO(irq);

	/* mask the interrupt */
	reg = __raw_readw(CPLD_INT_MASK_REG);
	reg \|= 1 << expio;
	__raw_writew(reg, CPLD_INT_MASK_REG);
	}

	/*
	* Acknowledge an expanded io pin's interrupt by clearing the bit in the isr.
	* @param irq an expanded io virtual irq number
	*/
	static void expio_ack_irq(uint32_t irq)
	{
	uint32_t expio = MXC_IRQ_TO_EXPIO(irq);

	/* clear the interrupt status */
	__raw_writew(1 << expio, CPLD_INT_RESET_REG);
	__raw_writew(0, CPLD_INT_RESET_REG);
	/* mask the interrupt */
	expio_mask_irq(irq);
	}

	/*
	* Enable a expio pin's interrupt by clearing the bit in the imr.
	* @param irq a expio virtual irq number
	*/
	static void expio_unmask_irq(uint32_t irq)
	{
	uint16_t reg;
	uint32_t expio = MXC_IRQ_TO_EXPIO(irq);

	/* unmask the interrupt */
	reg = __raw_readw(CPLD_INT_MASK_REG);
	reg &= ~(1 << expio);
	__raw_writew(reg, CPLD_INT_MASK_REG);
	}

	static struct irq_chip expio_irq_chip = {
	.ack = expio_ack_irq,
	.mask = expio_mask_irq,
	.unmask = expio_unmask_irq,
	};

	static int __init mx31pdk_init_expio(void)
	{
	int i;
	int ret;

	/* Check if there's a debug board connected */
	if ((__raw_readw(CPLD_MAGIC_NUMBER1_REG) != 0xAAAA) \|\|
	(__raw_readw(CPLD_MAGIC_NUMBER2_REG) != 0x5555) \|\|
	(__raw_readw(CPLD_MAGIC_NUMBER3_REG) != 0xCAFE)) {
	/* No Debug board found */
	return -ENODEV;
	}

	pr_info("i.MX31PDK Debug board detected, rev = 0x%04X\n",
	__raw_readw(CPLD_CODE_VER_REG));

	/*
	* Configure INT line as GPIO input
	*/
	ret = gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "sms9217-irq");
	if (ret)
	pr_warning("could not get LAN irq gpio\n");
	else
	gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));

	/* Disable the interrupts and clear the status */
	__raw_writew(0, CPLD_INT_MASK_REG);
	__raw_writew(0xFFFF, CPLD_INT_RESET_REG);
	__raw_writew(0, CPLD_INT_RESET_REG);
	__raw_writew(0x1F, CPLD_INT_MASK_REG);
	for (i = MXC_EXP_IO_BASE;
	i < (MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES);
	i++) {
	set_irq_chip(i, &expio_irq_chip);
	set_irq_handler(i, handle_level_irq);
	set_irq_flags(i, IRQF_VALID);
	}
	set_irq_type(EXPIO_PARENT_INT, IRQ_TYPE_LEVEL_LOW);
	set_irq_chained_handler(EXPIO_PARENT_INT, mx31pdk_expio_irq_handler);

	return 0;
	}

	/*
	* This structure defines the MX31 memory map.
	*/
	static struct map_desc mx31pdk_io_desc[] __initdata = {
	{
	.virtual = SPBA0_BASE_ADDR_VIRT,
	.pfn = __phys_to_pfn(SPBA0_BASE_ADDR),
	.length = SPBA0_SIZE,
	.type = MT_DEVICE_NONSHARED,
	}, {
	.virtual = CS5_BASE_ADDR_VIRT,
	.pfn = __phys_to_pfn(CS5_BASE_ADDR),
	.length = CS5_SIZE,
	.type = MT_DEVICE,
	},
	};

	/*
	* Set up static virtual mappings.
	*/
	static void __init mx31pdk_map_io(void)
	{
	mx31_map_io();
	iotable_init(mx31pdk_io_desc, ARRAY_SIZE(mx31pdk_io_desc));
	}

	/*!
	* Board specific initialization.
	*/
	static void __init mxc_board_init(void)
	{
	mxc_iomux_setup_multiple_pins(mx31pdk_pins, ARRAY_SIZE(mx31pdk_pins),
	"mx31pdk");

	mxc_register_device(&mxc_uart_device0, &uart_pdata);

	if (!mx31pdk_init_expio())
	platform_device_register(&smsc911x_device);
	}

	static void __init mx31pdk_timer_init(void)
	{
	mx31_clocks_init(26000000);
	}

	static struct sys_timer mx31pdk_timer = {
	.init = mx31pdk_timer_init,
	};

	/*
	* The following uses standard kernel macros defined in arch.h in order to
	* initialize __mach_desc_MX31PDK data structure.
	*/
	MACHINE_START(MX31_3DS, "Freescale MX31PDK (3DS)")
	/* Maintainer: Freescale Semiconductor, Inc. */
	.phys_io = AIPS1_BASE_ADDR,
	.io_pg_offst = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
	.boot_params = PHYS_OFFSET + 0x100,
	.map_io = mx31pdk_map_io,
	.init_irq = mx31_init_irq,
	.init_machine = mxc_board_init,
	.timer = &mx31pdk_timer,
	MACHINE_END