[mirror_ubuntu-zesty-kernel.git] / arch / arm / mach-sa1100 / neponset.c

/*
 * 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, irq;

	irq = ret = platform_get_irq(dev, 0);
	if (ret < 0)
		goto err_alloc;

	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, IRQ_TYPE_EDGE_RISING);
	irq_set_handler_data(irq, d);
	irq_set_chained_handler(irq, 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);
#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);
	int irq = platform_get_irq(dev, 0);

	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, 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[] = {
	DEFINE_RES_MEM(0x10000000, 0x08000000),
	DEFINE_RES_IRQ(IRQ_GPIO25),
};

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));
}
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* linux/arch/arm/mach-sa1100/neponset.c
1da177e4	3	*/
9590e898	4	#include <linux/err.h>
1da177e4	5	#include <linux/init.h>
1da177e4	6	#include <linux/ioport.h>
ced8d21c	7	#include <linux/irq.h>
92e617d9	8	#include <linux/kernel.h>
ae14c2e2	9	#include <linux/module.h>
d052d1be	10	#include <linux/platform_device.h>
92e617d9	11	#include <linux/serial_core.h>
ae14c2e2	12	#include <linux/slab.h>
1da177e4	13
1da177e4	14	#include <asm/mach-types.h>
1da177e4	15	#include <asm/mach/map.h>
1da177e4	16	#include <asm/mach/serial_sa1100.h>
1da177e4 LT	17	#include <asm/hardware/sa1111.h>
	18	#include <asm/sizes.h>
	19
92e617d9 RK	20	#include <mach/hardware.h>
	21	#include <mach/assabet.h>
	22	#include <mach/neponset.h>
	23
ced8d21c RK	24	#define NEP_IRQ_SMC91X 0
	25	#define NEP_IRQ_USAR 1
	26	#define NEP_IRQ_SA1111 2
	27	#define NEP_IRQ_NR 3
	28
ae14c2e2	29	struct neponset_drvdata {
9590e898 RK	30	struct platform_device *sa1111;
9590e898 RK	31	struct platform_device *smc91x;
ced8d21c	32	unsigned irq_base;
ae14c2e2 RK	33	#ifdef CONFIG_PM_SLEEP
	34	u32 ncr0;
	35	u32 mdm_ctl_0;
	36	#endif
	37	};
	38
6ad1b614 RK	39	void neponset_ncr_frob(unsigned int mask, unsigned int val)
	40	{
	41	unsigned long flags;
	42
	43	local_irq_save(flags);
	44	NCR_0 = (NCR_0 & ~mask) \| val;
	45	local_irq_restore(flags);
	46	}
	47
92e617d9 RK	48	static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
	49	{
	50	u_int mdm_ctl0 = MDM_CTL_0;
	51
	52	if (port->mapbase == _Ser1UTCR0) {
	53	if (mctrl & TIOCM_RTS)
	54	mdm_ctl0 &= ~MDM_CTL0_RTS2;
	55	else
	56	mdm_ctl0 \|= MDM_CTL0_RTS2;
	57
	58	if (mctrl & TIOCM_DTR)
	59	mdm_ctl0 &= ~MDM_CTL0_DTR2;
	60	else
	61	mdm_ctl0 \|= MDM_CTL0_DTR2;
	62	} else if (port->mapbase == _Ser3UTCR0) {
	63	if (mctrl & TIOCM_RTS)
	64	mdm_ctl0 &= ~MDM_CTL0_RTS1;
	65	else
	66	mdm_ctl0 \|= MDM_CTL0_RTS1;
	67
	68	if (mctrl & TIOCM_DTR)
	69	mdm_ctl0 &= ~MDM_CTL0_DTR1;
	70	else
	71	mdm_ctl0 \|= MDM_CTL0_DTR1;
	72	}
	73
	74	MDM_CTL_0 = mdm_ctl0;
	75	}
	76
	77	static u_int neponset_get_mctrl(struct uart_port *port)
	78	{
	79	u_int ret = TIOCM_CD \| TIOCM_CTS \| TIOCM_DSR;
	80	u_int mdm_ctl1 = MDM_CTL_1;
	81
	82	if (port->mapbase == _Ser1UTCR0) {
	83	if (mdm_ctl1 & MDM_CTL1_DCD2)
	84	ret &= ~TIOCM_CD;
	85	if (mdm_ctl1 & MDM_CTL1_CTS2)
	86	ret &= ~TIOCM_CTS;
	87	if (mdm_ctl1 & MDM_CTL1_DSR2)
	88	ret &= ~TIOCM_DSR;
	89	} else if (port->mapbase == _Ser3UTCR0) {
	90	if (mdm_ctl1 & MDM_CTL1_DCD1)
	91	ret &= ~TIOCM_CD;
	92	if (mdm_ctl1 & MDM_CTL1_CTS1)
	93	ret &= ~TIOCM_CTS;
	94	if (mdm_ctl1 & MDM_CTL1_DSR1)
	95	ret &= ~TIOCM_DSR;
	96	}
	97
	98	return ret;
	99	}
	100
	101	static struct sa1100_port_fns neponset_port_fns __devinitdata = {
	102	.set_mctrl = neponset_set_mctrl,
	103	.get_mctrl = neponset_get_mctrl,
	104	};
	105
1da177e4 LT	106	/*
	107	* Install handler for Neponset IRQ. Note that we have to loop here
	108	* since the ETHERNET and USAR IRQs are level based, and we need to
	109	* ensure that the IRQ signal is deasserted before returning. This
	110	* is rather unfortunate.
	111	*/
ced8d21c	112	static void neponset_irq_handler(unsigned int irq, struct irq_desc *desc)
1da177e4	113	{
ced8d21c	114	struct neponset_drvdata *d = irq_desc_get_handler_data(desc);
1da177e4 LT	115	unsigned int irr;
	116
	117	while (1) {
1da177e4 LT	118	/*
	119	* Acknowledge the parent IRQ.
	120	*/
c4e8964e	121	desc->irq_data.chip->irq_ack(&desc->irq_data);
1da177e4 LT	122
	123	/*
	124	* Read the interrupt reason register. Let's have all
	125	* active IRQ bits high. Note: there is a typo in the
	126	* Neponset user's guide for the SA1111 IRR level.
	127	*/
	128	irr = IRR ^ (IRR_ETHERNET \| IRR_USAR);
	129
	130	if ((irr & (IRR_ETHERNET \| IRR_USAR \| IRR_SA1111)) == 0)
	131	break;
	132
	133	/*
	134	* Since there is no individual mask, we have to
	135	* mask the parent IRQ. This is safe, since we'll
	136	* recheck the register for any pending IRQs.
	137	*/
	138	if (irr & (IRR_ETHERNET \| IRR_USAR)) {
c4e8964e	139	desc->irq_data.chip->irq_mask(&desc->irq_data);
1da177e4	140
d782f33d RK	141	/*
	142	* Ack the interrupt now to prevent re-entering
	143	* this neponset handler. Again, this is safe
	144	* since we'll check the IRR register prior to
	145	* leaving.
	146	*/
c4e8964e	147	desc->irq_data.chip->irq_ack(&desc->irq_data);
d782f33d	148
ced8d21c RK	149	if (irr & IRR_ETHERNET)
ced8d21c RK	150	generic_handle_irq(d->irq_base + NEP_IRQ_SMC91X);
1da177e4	151
ced8d21c RK	152	if (irr & IRR_USAR)
ced8d21c RK	153	generic_handle_irq(d->irq_base + NEP_IRQ_USAR);
1da177e4	154
c4e8964e	155	desc->irq_data.chip->irq_unmask(&desc->irq_data);
1da177e4 LT	156	}
1da177e4 LT	157
ced8d21c RK	158	if (irr & IRR_SA1111)
ced8d21c RK	159	generic_handle_irq(d->irq_base + NEP_IRQ_SA1111);
1da177e4 LT	160	}
	161	}
	162
ced8d21c	163	/* Yes, we really do not have any kind of masking or unmasking */
71045520 RK	164	static void nochip_noop(struct irq_data *irq)
	165	{
	166	}
	167
	168	static struct irq_chip nochip = {
	169	.name = "neponset",
	170	.irq_ack = nochip_noop,
	171	.irq_mask = nochip_noop,
	172	.irq_unmask = nochip_noop,
	173	};
	174
92e617d9 RK	175	static struct sa1111_platform_data sa1111_info = {
	176	.irq_base = IRQ_BOARD_END,
	177	};
	178
cdea4606	179	static int __devinit neponset_probe(struct platform_device *dev)
1da177e4	180	{
ae14c2e2	181	struct neponset_drvdata *d;
ced8d21c RK	182	struct resource sa1111_resources[] = {
	183	DEFINE_RES_MEM(0x40000000, SZ_8K),
	184	{ .flags = IORESOURCE_IRQ },
	185	};
9590e898 RK	186	struct platform_device_info sa1111_devinfo = {
	187	.parent = &dev->dev,
	188	.name = "sa1111",
	189	.id = 0,
	190	.res = sa1111_resources,
	191	.num_res = ARRAY_SIZE(sa1111_resources),
	192	.data = &sa1111_info,
	193	.size_data = sizeof(sa1111_info),
	194	.dma_mask = 0xffffffffUL,
	195	};
ced8d21c RK	196	struct resource smc91x_resources[] = {
	197	DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS,
	198	0x02000000, "smc91x-regs"),
	199	DEFINE_RES_MEM_NAMED(SA1100_CS3_PHYS + 0x02000000,
	200	0x02000000, "smc91x-attrib"),
	201	{ .flags = IORESOURCE_IRQ },
	202	};
9590e898 RK	203	struct platform_device_info smc91x_devinfo = {
	204	.parent = &dev->dev,
	205	.name = "smc91x",
	206	.id = 0,
	207	.res = smc91x_resources,
	208	.num_res = ARRAY_SIZE(smc91x_resources),
	209	};
b6bdfcf5 RK	210	int ret, irq;
	211
	212	irq = ret = platform_get_irq(dev, 0);
	213	if (ret < 0)
	214	goto err_alloc;
ae14c2e2 RK	215
	216	d = kzalloc(sizeof(*d), GFP_KERNEL);
	217	if (!d) {
	218	ret = -ENOMEM;
	219	goto err_alloc;
	220	}
	221
ced8d21c RK	222	ret = irq_alloc_descs(-1, IRQ_BOARD_START, NEP_IRQ_NR, -1);
	223	if (ret <= 0) {
	224	dev_err(&dev->dev, "unable to allocate %u irqs: %d\n",
	225	NEP_IRQ_NR, ret);
	226	if (ret == 0)
	227	ret = -ENOMEM;
	228	goto err_irq_alloc;
	229	}
	230
	231	d->irq_base = ret;
	232
	233	irq_set_chip_and_handler(d->irq_base + NEP_IRQ_SMC91X, &nochip,
	234	handle_simple_irq);
	235	set_irq_flags(d->irq_base + NEP_IRQ_SMC91X, IRQF_VALID \| IRQF_PROBE);
	236	irq_set_chip_and_handler(d->irq_base + NEP_IRQ_USAR, &nochip,
	237	handle_simple_irq);
	238	set_irq_flags(d->irq_base + NEP_IRQ_USAR, IRQF_VALID \| IRQF_PROBE);
	239	irq_set_chip(d->irq_base + NEP_IRQ_SA1111, &nochip);
1da177e4	240
b6bdfcf5 RK	241	irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
	242	irq_set_handler_data(irq, d);
	243	irq_set_chained_handler(irq, neponset_irq_handler);
1da177e4 LT	244
1da177e4 LT	245	/*
ced8d21c RK	246	* We would set IRQ_GPIO25 to be a wake-up IRQ, but unfortunately
ced8d21c RK	247	* something on the Neponset activates this IRQ on sleep (eth?)
1da177e4 LT	248	*/
1da177e4 LT	249	#if 0
b6bdfcf5	250	enable_irq_wake(irq);
1da177e4 LT	251	#endif
1da177e4 LT	252
ced8d21c RK	253	dev_info(&dev->dev, "Neponset daughter board, providing IRQ%u-%u\n",
ced8d21c RK	254	d->irq_base, d->irq_base + NEP_IRQ_NR - 1);
1da177e4	255
ced8d21c RK	256	sa1100_register_uart_fns(&neponset_port_fns);
	257
	258	/* Disable GPIO 0/1 drivers so the buttons work on the Assabet */
1da177e4 LT	259	NCR_0 = NCR_GP01_OFF;
1da177e4 LT	260
ced8d21c RK	261	sa1111_resources[1].start = d->irq_base + NEP_IRQ_SA1111;
ced8d21c RK	262	sa1111_resources[1].end = d->irq_base + NEP_IRQ_SA1111;
9590e898	263	d->sa1111 = platform_device_register_full(&sa1111_devinfo);
ced8d21c RK	264
	265	smc91x_resources[2].start = d->irq_base + NEP_IRQ_SMC91X;
	266	smc91x_resources[2].end = d->irq_base + NEP_IRQ_SMC91X;
9590e898 RK	267	d->smc91x = platform_device_register_full(&smc91x_devinfo);
9590e898 RK	268
ae14c2e2 RK	269	platform_set_drvdata(dev, d);
ae14c2e2 RK	270
1da177e4	271	return 0;
ae14c2e2	272
ced8d21c RK	273	err_irq_alloc:
ced8d21c RK	274	kfree(d);
ae14c2e2 RK	275	err_alloc:
ae14c2e2 RK	276	return ret;
1da177e4 LT	277	}
1da177e4 LT	278
ae14c2e2 RK	279	static int __devexit neponset_remove(struct platform_device *dev)
	280	{
	281	struct neponset_drvdata *d = platform_get_drvdata(dev);
b6bdfcf5	282	int irq = platform_get_irq(dev, 0);
1da177e4	283
9590e898 RK	284	if (!IS_ERR(d->sa1111))
	285	platform_device_unregister(d->sa1111);
	286	if (!IS_ERR(d->smc91x))
	287	platform_device_unregister(d->smc91x);
b6bdfcf5	288	irq_set_chained_handler(irq, NULL);
ced8d21c	289	irq_free_descs(d->irq_base, NEP_IRQ_NR);
ae14c2e2 RK	290	kfree(d);
	291
	292	return 0;
	293	}
93160c63	294
ae14c2e2	295	#ifdef CONFIG_PM
3ae5eaec	296	static int neponset_suspend(struct platform_device *dev, pm_message_t state)
1da177e4	297	{
ae14c2e2 RK	298	struct neponset_drvdata *d = platform_get_drvdata(dev);
	299
	300	d->ncr0 = NCR_0;
	301	d->mdm_ctl_0 = MDM_CTL_0;
1da177e4 LT	302
	303	return 0;
	304	}
	305
3ae5eaec	306	static int neponset_resume(struct platform_device *dev)
1da177e4	307	{
ae14c2e2 RK	308	struct neponset_drvdata *d = platform_get_drvdata(dev);
	309
	310	NCR_0 = d->ncr0;
	311	MDM_CTL_0 = d->mdm_ctl_0;
1da177e4 LT	312
	313	return 0;
	314	}
	315
	316	#else
	317	#define neponset_suspend NULL
	318	#define neponset_resume NULL
	319	#endif
	320
3ae5eaec	321	static struct platform_driver neponset_device_driver = {
1da177e4	322	.probe = neponset_probe,
ae14c2e2	323	.remove = __devexit_p(neponset_remove),
1da177e4 LT	324	.suspend = neponset_suspend,
1da177e4 LT	325	.resume = neponset_resume,
3ae5eaec RK	326	.driver = {
3ae5eaec RK	327	.name = "neponset",
398e58d0	328	.owner = THIS_MODULE,
3ae5eaec	329	},
1da177e4 LT	330	};
	331
	332	static struct resource neponset_resources[] = {
b6bdfcf5 RK	333	DEFINE_RES_MEM(0x10000000, 0x08000000),
b6bdfcf5 RK	334	DEFINE_RES_IRQ(IRQ_GPIO25),
1da177e4 LT	335	};
	336
	337	static struct platform_device neponset_device = {
	338	.name = "neponset",
	339	.id = 0,
	340	.num_resources = ARRAY_SIZE(neponset_resources),
	341	.resource = neponset_resources,
	342	};
	343
cdcb81f7 RK	344	extern void sa1110_mb_disable(void);
cdcb81f7 RK	345
1da177e4 LT	346	static int __init neponset_init(void)
1da177e4 LT	347	{
3ae5eaec	348	platform_driver_register(&neponset_device_driver);
1da177e4 LT	349
	350	/*
	351	* The Neponset is only present on the Assabet machine type.
	352	*/
	353	if (!machine_is_assabet())
	354	return -ENODEV;
	355
	356	/*
	357	* Ensure that the memory bus request/grant signals are setup,
	358	* and the grant is held in its inactive state, whether or not
	359	* we actually have a Neponset attached.
	360	*/
	361	sa1110_mb_disable();
	362
	363	if (!machine_has_neponset()) {
	364	printk(KERN_DEBUG "Neponset expansion board not present\n");
	365	return -ENODEV;
	366	}
	367
	368	if (WHOAMI != 0x11) {
	369	printk(KERN_WARNING "Neponset board detected, but "
	370	"wrong ID: %02x\n", WHOAMI);
	371	return -ENODEV;
	372	}
	373
9590e898	374	return platform_device_register(&neponset_device);
1da177e4 LT	375	}
	376
	377	subsys_initcall(neponset_init);
	378
	379	static struct map_desc neponset_io_desc[] __initdata = {
92519d82 DS	380	{ /* System Registers */
	381	.virtual = 0xf3000000,
	382	.pfn = __phys_to_pfn(0x10000000),
	383	.length = SZ_1M,
	384	.type = MT_DEVICE
	385	}, { /* SA-1111 */
	386	.virtual = 0xf4000000,
	387	.pfn = __phys_to_pfn(0x40000000),
	388	.length = SZ_1M,
	389	.type = MT_DEVICE
	390	}
1da177e4 LT	391	};
	392
	393	void __init neponset_map_io(void)
	394	{
	395	iotable_init(neponset_io_desc, ARRAY_SIZE(neponset_io_desc));
	396	}