arch/arm/mach-sa1100/neponset.c - kernel/msm-5.4 - Gitiles

 /*
  * linux/arch/arm/mach-sa1100/neponset.c
  */
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/serial_core.h>
 #include <linux/slab.h>

 #include <asm/mach-types.h>
 #include <asm/mach/map.h>
 #include <asm/mach/serial_sa1100.h>
 #include <asm/hardware/sa1111.h>
 #include <asm/sizes.h>

 #include <mach/hardware.h>
 #include <mach/assabet.h>
 #include <mach/neponset.h>

 #define NEP_IRQ_SMC91X	0
 #define NEP_IRQ_USAR	1
 #define NEP_IRQ_SA1111	2
 #define NEP_IRQ_NR	3

 struct neponset_drvdata {
 	struct platform_device *sa1111;
 	struct platform_device *smc91x;
 	unsigned irq_base;
 #ifdef CONFIG_PM_SLEEP
 	u32 ncr0;
 	u32 mdm_ctl_0;
 #endif
 };

 void neponset_ncr_frob(unsigned int mask, unsigned int val)
 {
 	unsigned long flags;

 	local_irq_save(flags);
 	NCR_0 = (NCR_0 & ~mask) | val;
 	local_irq_restore(flags);
 }

 static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
 {
 	u_int mdm_ctl0 = MDM_CTL_0;

 	if (port->mapbase == _Ser1UTCR0) {
 		if (mctrl & TIOCM_RTS)
 			mdm_ctl0 &= ~MDM_CTL0_RTS2;
 		else
 			mdm_ctl0 |= MDM_CTL0_RTS2;

 		if (mctrl & TIOCM_DTR)
 			mdm_ctl0 &= ~MDM_CTL0_DTR2;
 		else
 			mdm_ctl0 |= MDM_CTL0_DTR2;
 	} else if (port->mapbase == _Ser3UTCR0) {
 		if (mctrl & TIOCM_RTS)
 			mdm_ctl0 &= ~MDM_CTL0_RTS1;
 		else
 			mdm_ctl0 |= MDM_CTL0_RTS1;

 		if (mctrl & TIOCM_DTR)
 			mdm_ctl0 &= ~MDM_CTL0_DTR1;
 		else
 			mdm_ctl0 |= MDM_CTL0_DTR1;
 	}

 	MDM_CTL_0 = mdm_ctl0;
 }

 static u_int neponset_get_mctrl(struct uart_port *port)
 {
 	u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
 	u_int mdm_ctl1 = MDM_CTL_1;

 	if (port->mapbase == _Ser1UTCR0) {
 		if (mdm_ctl1 & MDM_CTL1_DCD2)
 			ret &= ~TIOCM_CD;
 		if (mdm_ctl1 & MDM_CTL1_CTS2)
 			ret &= ~TIOCM_CTS;
 		if (mdm_ctl1 & MDM_CTL1_DSR2)
 			ret &= ~TIOCM_DSR;
 	} else if (port->mapbase == _Ser3UTCR0) {
 		if (mdm_ctl1 & MDM_CTL1_DCD1)
 			ret &= ~TIOCM_CD;
 		if (mdm_ctl1 & MDM_CTL1_CTS1)
 			ret &= ~TIOCM_CTS;
 		if (mdm_ctl1 & MDM_CTL1_DSR1)
 			ret &= ~TIOCM_DSR;
 	}

 	return ret;
 }

 static struct sa1100_port_fns neponset_port_fns __devinitdata = {
 	.set_mctrl	= neponset_set_mctrl,
 	.get_mctrl	= neponset_get_mctrl,
 };

 /*
  * Install handler for Neponset IRQ.  Note that we have to loop here
  * since the ETHERNET and USAR IRQs are level based, and we need to
  * ensure that the IRQ signal is deasserted before returning.  This
  * is rather unfortunate.
  */
 static void neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
 {
 	struct neponset_drvdata *d = irq_desc_get_handler_data(desc);
 	unsigned int irr;

 	while (1) {
 		/*
 		 * Acknowledge the parent IRQ.
 		 */
 		desc->irq_data.chip->irq_ack(&desc->irq_data);

 		/*
 		 * Read the interrupt reason register.  Let's have all
 		 * active IRQ bits high.  Note: there is a typo in the
 		 * Neponset user's guide for the SA1111 IRR level.
 		 */
 		irr = IRR ^ (IRR_ETHERNET | IRR_USAR);

 		if ((irr & (IRR_ETHERNET | IRR_USAR | IRR_SA1111)) == 0)
 			break;

 		/*
 		 * Since there is no individual mask, we have to
 		 * mask the parent IRQ.  This is safe, since we'll
 		 * recheck the register for any pending IRQs.
 		 */
 		if (irr & (IRR_ETHERNET | IRR_USAR)) {
 			desc->irq_data.chip->irq_mask(&desc->irq_data);

 			/*
 			 * Ack the interrupt now to prevent re-entering
 			 * this neponset handler.  Again, this is safe
 			 * since we'll check the IRR register prior to
 			 * leaving.
 			 */
 			desc->irq_data.chip->irq_ack(&desc->irq_data);

 			if (irr & IRR_ETHERNET)
 				generic_handle_irq(d->irq_base + NEP_IRQ_SMC91X);

 			if (irr & IRR_USAR)
 				generic_handle_irq(d->irq_base + NEP_IRQ_USAR);

 			desc->irq_data.chip->irq_unmask(&desc->irq_data);
 		}

 		if (irr & IRR_SA1111)
 			generic_handle_irq(d->irq_base + NEP_IRQ_SA1111);
 	}
 }

 /* Yes, we really do not have any kind of masking or unmasking */
 static void nochip_noop(struct irq_data *irq)
 {
 }

 static struct irq_chip nochip = {
 	.name = "neponset",
 	.irq_ack = nochip_noop,
 	.irq_mask = nochip_noop,
 	.irq_unmask = nochip_noop,
 };

 static struct sa1111_platform_data sa1111_info = {
 	.irq_base	= IRQ_BOARD_END,
 };

 static int __devinit neponset_probe(struct platform_device *dev)
 {
 	struct neponset_drvdata *d;
 	struct resource sa1111_resources[] = {
 		DEFINE_RES_MEM(0x40000000, SZ_8K),
 		{ .flags = IORESOURCE_IRQ },
 	};
 	struct platform_device_info sa1111_devinfo = {
 		.parent = &dev->dev,
 		.name = "sa1111",
 		.id = 0,
 		.res = sa1111_resources,
 		.num_res = ARRAY_SIZE(sa1111_resources),
 		.data = &sa1111_info,
 		.size_data = sizeof(sa1111_info),
 		.dma_mask = 0xffffffffUL,
 	};
 	struct resource smc91x_resources[] = {
 		DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS,
 			0x02000000, "smc91x-regs"),
 		DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS + 0x02000000,
 			0x02000000, "smc91x-attrib"),
 		{ .flags = IORESOURCE_IRQ },
 	};
 	struct platform_device_info smc91x_devinfo = {
 		.parent = &dev->dev,
 		.name = "smc91x",
 		.id = 0,
 		.res = smc91x_resources,
 		.num_res = ARRAY_SIZE(smc91x_resources),
 	};
 	int ret;

 	d = kzalloc(sizeof(*d), GFP_KERNEL);
 	if (!d) {
 		ret = -ENOMEM;
 		goto err_alloc;
 	}

 	ret = irq_alloc_descs(-1, IRQ_BOARD_START, NEP_IRQ_NR, -1);
 	if (ret <= 0) {
 		dev_err(&dev->dev, "unable to allocate %u irqs: %d\n",
 			NEP_IRQ_NR, ret);
 		if (ret == 0)
 			ret = -ENOMEM;
 		goto err_irq_alloc;
 	}

 	d->irq_base = ret;

 	irq_set_chip_and_handler(d->irq_base + NEP_IRQ_SMC91X, &nochip,
 		handle_simple_irq);
 	set_irq_flags(d->irq_base + NEP_IRQ_SMC91X, IRQF_VALID | IRQF_PROBE);
 	irq_set_chip_and_handler(d->irq_base + NEP_IRQ_USAR, &nochip,
 		handle_simple_irq);
 	set_irq_flags(d->irq_base + NEP_IRQ_USAR, IRQF_VALID | IRQF_PROBE);
 	irq_set_chip(d->irq_base + NEP_IRQ_SA1111, &nochip);

 	irq_set_irq_type(IRQ_GPIO25, IRQ_TYPE_EDGE_RISING);
 	irq_set_handler_data(IRQ_GPIO25, d);
 	irq_set_chained_handler(IRQ_GPIO25, neponset_irq_handler);

 	/*
 	 * We would set IRQ_GPIO25 to be a wake-up IRQ, but unfortunately
 	 * something on the Neponset activates this IRQ on sleep (eth?)
 	 */
 #if 0
 	enable_irq_wake(IRQ_GPIO25);
 #endif

 	dev_info(&dev->dev, "Neponset daughter board, providing IRQ%u-%u\n",
 		 d->irq_base, d->irq_base + NEP_IRQ_NR - 1);

 	sa1100_register_uart_fns(&neponset_port_fns);

 	/* Disable GPIO 0/1 drivers so the buttons work on the Assabet */
 	NCR_0 = NCR_GP01_OFF;

 	sa1111_resources[1].start = d->irq_base + NEP_IRQ_SA1111;
 	sa1111_resources[1].end = d->irq_base + NEP_IRQ_SA1111;
 	d->sa1111 = platform_device_register_full(&sa1111_devinfo);

 	smc91x_resources[2].start = d->irq_base + NEP_IRQ_SMC91X;
 	smc91x_resources[2].end = d->irq_base + NEP_IRQ_SMC91X;
 	d->smc91x = platform_device_register_full(&smc91x_devinfo);

 	platform_set_drvdata(dev, d);

 	return 0;

  err_irq_alloc:
 	kfree(d);
  err_alloc:
 	return ret;
 }

 static int __devexit neponset_remove(struct platform_device *dev)
 {
 	struct neponset_drvdata *d = platform_get_drvdata(dev);

 	if (!IS_ERR(d->sa1111))
 		platform_device_unregister(d->sa1111);
 	if (!IS_ERR(d->smc91x))
 		platform_device_unregister(d->smc91x);
 	irq_set_chained_handler(IRQ_GPIO25, NULL);
 	irq_free_descs(d->irq_base, NEP_IRQ_NR);
 	kfree(d);

 	return 0;
 }

 #ifdef CONFIG_PM
 static int neponset_suspend(struct platform_device *dev, pm_message_t state)
 {
 	struct neponset_drvdata *d = platform_get_drvdata(dev);

 	d->ncr0 = NCR_0;
 	d->mdm_ctl_0 = MDM_CTL_0;

 	return 0;
 }

 static int neponset_resume(struct platform_device *dev)
 {
 	struct neponset_drvdata *d = platform_get_drvdata(dev);

 	NCR_0 = d->ncr0;
 	MDM_CTL_0 = d->mdm_ctl_0;

 	return 0;
 }

 #else
 #define neponset_suspend NULL
 #define neponset_resume  NULL
 #endif

 static struct platform_driver neponset_device_driver = {
 	.probe		= neponset_probe,
 	.remove		= __devexit_p(neponset_remove),
 	.suspend	= neponset_suspend,
 	.resume		= neponset_resume,
 	.driver		= {
 		.name	= "neponset",
 		.owner	= THIS_MODULE,
 	},
 };

 static struct resource neponset_resources[] = {
 	[0] = DEFINE_RES_MEM(0x10000000, 0x08000000),
 };

 static struct platform_device neponset_device = {
 	.name		= "neponset",
 	.id		= 0,
 	.num_resources	= ARRAY_SIZE(neponset_resources),
 	.resource	= neponset_resources,
 };

 extern void sa1110_mb_disable(void);

 static int __init neponset_init(void)
 {
 	platform_driver_register(&neponset_device_driver);

 	/*
 	 * The Neponset is only present on the Assabet machine type.
 	 */
 	if (!machine_is_assabet())
 		return -ENODEV;

 	/*
 	 * Ensure that the memory bus request/grant signals are setup,
 	 * and the grant is held in its inactive state, whether or not
 	 * we actually have a Neponset attached.
 	 */
 	sa1110_mb_disable();

 	if (!machine_has_neponset()) {
 		printk(KERN_DEBUG "Neponset expansion board not present\n");
 		return -ENODEV;
 	}

 	if (WHOAMI != 0x11) {
 		printk(KERN_WARNING "Neponset board detected, but "
 			"wrong ID: %02x\n", WHOAMI);
 		return -ENODEV;
 	}

 	return platform_device_register(&neponset_device);
 }

 subsys_initcall(neponset_init);

 static struct map_desc neponset_io_desc[] __initdata = {
 	{	/* System Registers */
 		.virtual	=  0xf3000000,
 		.pfn		= __phys_to_pfn(0x10000000),
 		.length		= SZ_1M,
 		.type		= MT_DEVICE
 	}, {	/* SA-1111 */
 		.virtual	=  0xf4000000,
 		.pfn		= __phys_to_pfn(0x40000000),
 		.length		= SZ_1M,
 		.type		= MT_DEVICE
 	}
 };

 void __init neponset_map_io(void)
 {
 	iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));
 }
	/*
	* linux/arch/arm/mach-sa1100/neponset.c
	*/
	#include <linux/err.h>
	#include <linux/init.h>
	#include <linux/ioport.h>
	#include <linux/irq.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/serial_core.h>
	#include <linux/slab.h>

	#include <asm/mach-types.h>
	#include <asm/mach/map.h>
	#include <asm/mach/serial_sa1100.h>
	#include <asm/hardware/sa1111.h>
	#include <asm/sizes.h>

	#include <mach/hardware.h>
	#include <mach/assabet.h>
	#include <mach/neponset.h>

	#define NEP_IRQ_SMC91X 0
	#define NEP_IRQ_USAR 1
	#define NEP_IRQ_SA1111 2
	#define NEP_IRQ_NR 3

	struct neponset_drvdata {
	struct platform_device *sa1111;
	struct platform_device *smc91x;
	unsigned irq_base;
	#ifdef CONFIG_PM_SLEEP
	u32 ncr0;
	u32 mdm_ctl_0;
	#endif
	};

	void neponset_ncr_frob(unsigned int mask, unsigned int val)
	{
	unsigned long flags;

	local_irq_save(flags);
	NCR_0 = (NCR_0 & ~mask) \| val;
	local_irq_restore(flags);
	}

	static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
	{
	u_int mdm_ctl0 = MDM_CTL_0;

	if (port->mapbase == _Ser1UTCR0) {
	if (mctrl & TIOCM_RTS)
	mdm_ctl0 &= ~MDM_CTL0_RTS2;
	else
	mdm_ctl0 \|= MDM_CTL0_RTS2;

	if (mctrl & TIOCM_DTR)
	mdm_ctl0 &= ~MDM_CTL0_DTR2;
	else
	mdm_ctl0 \|= MDM_CTL0_DTR2;
	} else if (port->mapbase == _Ser3UTCR0) {
	if (mctrl & TIOCM_RTS)
	mdm_ctl0 &= ~MDM_CTL0_RTS1;
	else
	mdm_ctl0 \|= MDM_CTL0_RTS1;

	if (mctrl & TIOCM_DTR)
	mdm_ctl0 &= ~MDM_CTL0_DTR1;
	else
	mdm_ctl0 \|= MDM_CTL0_DTR1;
	}

	MDM_CTL_0 = mdm_ctl0;
	}

	static u_int neponset_get_mctrl(struct uart_port *port)
	{
	u_int ret = TIOCM_CD \| TIOCM_CTS \| TIOCM_DSR;
	u_int mdm_ctl1 = MDM_CTL_1;

	if (port->mapbase == _Ser1UTCR0) {
	if (mdm_ctl1 & MDM_CTL1_DCD2)
	ret &= ~TIOCM_CD;
	if (mdm_ctl1 & MDM_CTL1_CTS2)
	ret &= ~TIOCM_CTS;
	if (mdm_ctl1 & MDM_CTL1_DSR2)
	ret &= ~TIOCM_DSR;
	} else if (port->mapbase == _Ser3UTCR0) {
	if (mdm_ctl1 & MDM_CTL1_DCD1)
	ret &= ~TIOCM_CD;
	if (mdm_ctl1 & MDM_CTL1_CTS1)
	ret &= ~TIOCM_CTS;
	if (mdm_ctl1 & MDM_CTL1_DSR1)
	ret &= ~TIOCM_DSR;
	}

	return ret;
	}

	static struct sa1100_port_fns neponset_port_fns __devinitdata = {
	.set_mctrl = neponset_set_mctrl,
	.get_mctrl = neponset_get_mctrl,
	};

	/*
	* Install handler for Neponset IRQ. Note that we have to loop here
	* since the ETHERNET and USAR IRQs are level based, and we need to
	* ensure that the IRQ signal is deasserted before returning. This
	* is rather unfortunate.
	*/
	static void neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
	{
	struct neponset_drvdata *d = irq_desc_get_handler_data(desc);
	unsigned int irr;

	while (1) {
	/*
	* Acknowledge the parent IRQ.
	*/
	desc->irq_data.chip->irq_ack(&desc->irq_data);

	/*
	* Read the interrupt reason register. Let's have all
	* active IRQ bits high. Note: there is a typo in the
	* Neponset user's guide for the SA1111 IRR level.
	*/
	irr = IRR ^ (IRR_ETHERNET \| IRR_USAR);

	if ((irr & (IRR_ETHERNET \| IRR_USAR \| IRR_SA1111)) == 0)
	break;

	/*
	* Since there is no individual mask, we have to
	* mask the parent IRQ. This is safe, since we'll
	* recheck the register for any pending IRQs.
	*/
	if (irr & (IRR_ETHERNET \| IRR_USAR)) {
	desc->irq_data.chip->irq_mask(&desc->irq_data);

	/*
	* Ack the interrupt now to prevent re-entering
	* this neponset handler. Again, this is safe
	* since we'll check the IRR register prior to
	* leaving.
	*/
	desc->irq_data.chip->irq_ack(&desc->irq_data);

	if (irr & IRR_ETHERNET)
	generic_handle_irq(d->irq_base + NEP_IRQ_SMC91X);

	if (irr & IRR_USAR)
	generic_handle_irq(d->irq_base + NEP_IRQ_USAR);

	desc->irq_data.chip->irq_unmask(&desc->irq_data);
	}

	if (irr & IRR_SA1111)
	generic_handle_irq(d->irq_base + NEP_IRQ_SA1111);
	}
	}

	/* Yes, we really do not have any kind of masking or unmasking */
	static void nochip_noop(struct irq_data *irq)
	{
	}

	static struct irq_chip nochip = {
	.name = "neponset",
	.irq_ack = nochip_noop,
	.irq_mask = nochip_noop,
	.irq_unmask = nochip_noop,
	};

	static struct sa1111_platform_data sa1111_info = {
	.irq_base = IRQ_BOARD_END,
	};

	static int __devinit neponset_probe(struct platform_device *dev)
	{
	struct neponset_drvdata *d;
	struct resource sa1111_resources[] = {
	DEFINE_RES_MEM(0x40000000, SZ_8K),
	{ .flags = IORESOURCE_IRQ },
	};
	struct platform_device_info sa1111_devinfo = {
	.parent = &dev->dev,
	.name = "sa1111",
	.id = 0,
	.res = sa1111_resources,
	.num_res = ARRAY_SIZE(sa1111_resources),
	.data = &sa1111_info,
	.size_data = sizeof(sa1111_info),
	.dma_mask = 0xffffffffUL,
	};
	struct resource smc91x_resources[] = {
	DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS,
	0x02000000, "smc91x-regs"),
	DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS + 0x02000000,
	0x02000000, "smc91x-attrib"),
	{ .flags = IORESOURCE_IRQ },
	};
	struct platform_device_info smc91x_devinfo = {
	.parent = &dev->dev,
	.name = "smc91x",
	.id = 0,
	.res = smc91x_resources,
	.num_res = ARRAY_SIZE(smc91x_resources),
	};
	int ret;

	d = kzalloc(sizeof(*d), GFP_KERNEL);
	if (!d) {
	ret = -ENOMEM;
	goto err_alloc;
	}

	ret = irq_alloc_descs(-1, IRQ_BOARD_START, NEP_IRQ_NR, -1);
	if (ret <= 0) {
	dev_err(&dev->dev, "unable to allocate %u irqs: %d\n",
	NEP_IRQ_NR, ret);
	if (ret == 0)
	ret = -ENOMEM;
	goto err_irq_alloc;
	}

	d->irq_base = ret;

	irq_set_chip_and_handler(d->irq_base + NEP_IRQ_SMC91X, &nochip,
	handle_simple_irq);
	set_irq_flags(d->irq_base + NEP_IRQ_SMC91X, IRQF_VALID \| IRQF_PROBE);
	irq_set_chip_and_handler(d->irq_base + NEP_IRQ_USAR, &nochip,
	handle_simple_irq);
	set_irq_flags(d->irq_base + NEP_IRQ_USAR, IRQF_VALID \| IRQF_PROBE);
	irq_set_chip(d->irq_base + NEP_IRQ_SA1111, &nochip);

	irq_set_irq_type(IRQ_GPIO25, IRQ_TYPE_EDGE_RISING);
	irq_set_handler_data(IRQ_GPIO25, d);
	irq_set_chained_handler(IRQ_GPIO25, neponset_irq_handler);

	/*
	* We would set IRQ_GPIO25 to be a wake-up IRQ, but unfortunately
	* something on the Neponset activates this IRQ on sleep (eth?)
	*/
	#if 0
	enable_irq_wake(IRQ_GPIO25);
	#endif

	dev_info(&dev->dev, "Neponset daughter board, providing IRQ%u-%u\n",
	d->irq_base, d->irq_base + NEP_IRQ_NR - 1);

	sa1100_register_uart_fns(&neponset_port_fns);

	/* Disable GPIO 0/1 drivers so the buttons work on the Assabet */
	NCR_0 = NCR_GP01_OFF;

	sa1111_resources[1].start = d->irq_base + NEP_IRQ_SA1111;
	sa1111_resources[1].end = d->irq_base + NEP_IRQ_SA1111;
	d->sa1111 = platform_device_register_full(&sa1111_devinfo);

	smc91x_resources[2].start = d->irq_base + NEP_IRQ_SMC91X;
	smc91x_resources[2].end = d->irq_base + NEP_IRQ_SMC91X;
	d->smc91x = platform_device_register_full(&smc91x_devinfo);

	platform_set_drvdata(dev, d);

	return 0;

	err_irq_alloc:
	kfree(d);
	err_alloc:
	return ret;
	}

	static int __devexit neponset_remove(struct platform_device *dev)
	{
	struct neponset_drvdata *d = platform_get_drvdata(dev);

	if (!IS_ERR(d->sa1111))
	platform_device_unregister(d->sa1111);
	if (!IS_ERR(d->smc91x))
	platform_device_unregister(d->smc91x);
	irq_set_chained_handler(IRQ_GPIO25, NULL);
	irq_free_descs(d->irq_base, NEP_IRQ_NR);
	kfree(d);

	return 0;
	}

	#ifdef CONFIG_PM
	static int neponset_suspend(struct platform_device *dev, pm_message_t state)
	{
	struct neponset_drvdata *d = platform_get_drvdata(dev);

	d->ncr0 = NCR_0;
	d->mdm_ctl_0 = MDM_CTL_0;

	return 0;
	}

	static int neponset_resume(struct platform_device *dev)
	{
	struct neponset_drvdata *d = platform_get_drvdata(dev);

	NCR_0 = d->ncr0;
	MDM_CTL_0 = d->mdm_ctl_0;

	return 0;
	}

	#else
	#define neponset_suspend NULL
	#define neponset_resume NULL
	#endif

	static struct platform_driver neponset_device_driver = {
	.probe = neponset_probe,
	.remove = __devexit_p(neponset_remove),
	.suspend = neponset_suspend,
	.resume = neponset_resume,
	.driver = {
	.name = "neponset",
	.owner = THIS_MODULE,
	},
	};

	static struct resource neponset_resources[] = {
	[0] = DEFINE_RES_MEM(0x10000000, 0x08000000),
	};

	static struct platform_device neponset_device = {
	.name = "neponset",
	.id = 0,
	.num_resources = ARRAY_SIZE(neponset_resources),
	.resource = neponset_resources,
	};

	extern void sa1110_mb_disable(void);

	static int __init neponset_init(void)
	{
	platform_driver_register(&neponset_device_driver);

	/*
	* The Neponset is only present on the Assabet machine type.
	*/
	if (!machine_is_assabet())
	return -ENODEV;

	/*
	* Ensure that the memory bus request/grant signals are setup,
	* and the grant is held in its inactive state, whether or not
	* we actually have a Neponset attached.
	*/
	sa1110_mb_disable();

	if (!machine_has_neponset()) {
	printk(KERN_DEBUG "Neponset expansion board not present\n");
	return -ENODEV;
	}

	if (WHOAMI != 0x11) {
	printk(KERN_WARNING "Neponset board detected, but "
	"wrong ID: %02x\n", WHOAMI);
	return -ENODEV;
	}

	return platform_device_register(&neponset_device);
	}

	subsys_initcall(neponset_init);

	static struct map_desc neponset_io_desc[] __initdata = {
	{ /* System Registers */
	.virtual = 0xf3000000,
	.pfn = __phys_to_pfn(0x10000000),
	.length = SZ_1M,
	.type = MT_DEVICE
	}, { /* SA-1111 */
	.virtual = 0xf4000000,
	.pfn = __phys_to_pfn(0x40000000),
	.length = SZ_1M,
	.type = MT_DEVICE
	}
	};

	void __init neponset_map_io(void)
	{
	iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));
	}