[deliverable/linux.git] / drivers / gpio / gpio-mpc8xxx.c

/*
 * GPIOs on MPC512x/8349/8572/8610 and compatible
 *
 * Copyright (C) 2008 Peter Korsgaard <jacmet@sunsite.dk>
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2.  This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/irq.h>

#define MPC8XXX_GPIO_PINS	32

#define GPIO_DIR		0x00
#define GPIO_ODR		0x04
#define GPIO_DAT		0x08
#define GPIO_IER		0x0c
#define GPIO_IMR		0x10
#define GPIO_ICR		0x14
#define GPIO_ICR2		0x18

struct mpc8xxx_gpio_chip {
	struct of_mm_gpio_chip mm_gc;
	spinlock_t lock;

	/*
	 * shadowed data register to be able to clear/set output pins in
	 * open drain mode safely
	 */
	u32 data;
	struct irq_domain *irq;
	void *of_dev_id_data;
};

static inline u32 mpc8xxx_gpio2mask(unsigned int gpio)
{
	return 1u << (MPC8XXX_GPIO_PINS - 1 - gpio);
}

static inline struct mpc8xxx_gpio_chip *
to_mpc8xxx_gpio_chip(struct of_mm_gpio_chip *mm)
{
	return container_of(mm, struct mpc8xxx_gpio_chip, mm_gc);
}

static void mpc8xxx_gpio_save_regs(struct of_mm_gpio_chip *mm)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);

	mpc8xxx_gc->data = in_be32(mm->regs + GPIO_DAT);
}

/* Workaround GPIO 1 errata on MPC8572/MPC8536. The status of GPIOs
 * defined as output cannot be determined by reading GPDAT register,
 * so we use shadow data register instead. The status of input pins
 * is determined by reading GPDAT register.
 */
static int mpc8572_gpio_get(struct gpio_chip *gc, unsigned int gpio)
{
	u32 val;
	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);

	val = in_be32(mm->regs + GPIO_DAT) & ~in_be32(mm->regs + GPIO_DIR);

	return (val | mpc8xxx_gc->data) & mpc8xxx_gpio2mask(gpio);
}

static int mpc8xxx_gpio_get(struct gpio_chip *gc, unsigned int gpio)
{
	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);

	return in_be32(mm->regs + GPIO_DAT) & mpc8xxx_gpio2mask(gpio);
}

static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
{
	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	unsigned long flags;

	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);

	if (val)
		mpc8xxx_gc->data |= mpc8xxx_gpio2mask(gpio);
	else
		mpc8xxx_gc->data &= ~mpc8xxx_gpio2mask(gpio);

	out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data);

	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}

static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
{
	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	unsigned long flags;

	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);

	clrbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));

	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);

	return 0;
}

static int mpc8xxx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
{
	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	unsigned long flags;

	mpc8xxx_gpio_set(gc, gpio, val);

	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);

	setbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));

	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);

	return 0;
}

static int mpc5121_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
{
	/* GPIO 28..31 are input only on MPC5121 */
	if (gpio >= 28)
		return -EINVAL;

	return mpc8xxx_gpio_dir_out(gc, gpio, val);
}

static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);

	if (mpc8xxx_gc->irq && offset < MPC8XXX_GPIO_PINS)
		return irq_create_mapping(mpc8xxx_gc->irq, offset);
	else
		return -ENXIO;
}

static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_desc_get_handler_data(desc);
	struct irq_chip *chip = irq_desc_get_chip(desc);
	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	unsigned int mask;

	mask = in_be32(mm->regs + GPIO_IER) & in_be32(mm->regs + GPIO_IMR);
	if (mask)
		generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
						     32 - ffs(mask)));
	if (chip->irq_eoi)
		chip->irq_eoi(&desc->irq_data);
}

static void mpc8xxx_irq_unmask(struct irq_data *d)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	unsigned long flags;

	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);

	setbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));

	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}

static void mpc8xxx_irq_mask(struct irq_data *d)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	unsigned long flags;

	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);

	clrbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));

	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
}

static void mpc8xxx_irq_ack(struct irq_data *d)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;

	out_be32(mm->regs + GPIO_IER, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
}

static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	unsigned long flags;

	switch (flow_type) {
	case IRQ_TYPE_EDGE_FALLING:
		spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
		setbits32(mm->regs + GPIO_ICR,
			  mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
		spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
		break;

	case IRQ_TYPE_EDGE_BOTH:
		spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
		clrbits32(mm->regs + GPIO_ICR,
			  mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
		spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int mpc512x_irq_set_type(struct irq_data *d, unsigned int flow_type)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	unsigned long gpio = irqd_to_hwirq(d);
	void __iomem *reg;
	unsigned int shift;
	unsigned long flags;

	if (gpio < 16) {
		reg = mm->regs + GPIO_ICR;
		shift = (15 - gpio) * 2;
	} else {
		reg = mm->regs + GPIO_ICR2;
		shift = (15 - (gpio % 16)) * 2;
	}

	switch (flow_type) {
	case IRQ_TYPE_EDGE_FALLING:
	case IRQ_TYPE_LEVEL_LOW:
		spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
		clrsetbits_be32(reg, 3 << shift, 2 << shift);
		spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
		break;

	case IRQ_TYPE_EDGE_RISING:
	case IRQ_TYPE_LEVEL_HIGH:
		spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
		clrsetbits_be32(reg, 3 << shift, 1 << shift);
		spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
		break;

	case IRQ_TYPE_EDGE_BOTH:
		spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
		clrbits32(reg, 3 << shift);
		spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static struct irq_chip mpc8xxx_irq_chip = {
	.name		= "mpc8xxx-gpio",
	.irq_unmask	= mpc8xxx_irq_unmask,
	.irq_mask	= mpc8xxx_irq_mask,
	.irq_ack	= mpc8xxx_irq_ack,
	.irq_set_type	= mpc8xxx_irq_set_type,
};

static int mpc8xxx_gpio_irq_map(struct irq_domain *h, unsigned int virq,
				irq_hw_number_t hw)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc = h->host_data;

	if (mpc8xxx_gc->of_dev_id_data)
		mpc8xxx_irq_chip.irq_set_type = mpc8xxx_gc->of_dev_id_data;

	irq_set_chip_data(virq, h->host_data);
	irq_set_chip_and_handler(virq, &mpc8xxx_irq_chip, handle_level_irq);
	irq_set_irq_type(virq, IRQ_TYPE_NONE);

	return 0;
}

static struct irq_domain_ops mpc8xxx_gpio_irq_ops = {
	.map	= mpc8xxx_gpio_irq_map,
	.xlate	= irq_domain_xlate_twocell,
};

static struct of_device_id mpc8xxx_gpio_ids[] __initdata = {
	{ .compatible = "fsl,mpc8349-gpio", },
	{ .compatible = "fsl,mpc8572-gpio", },
	{ .compatible = "fsl,mpc8610-gpio", },
	{ .compatible = "fsl,mpc5121-gpio", .data = mpc512x_irq_set_type, },
	{ .compatible = "fsl,pq3-gpio",     },
	{ .compatible = "fsl,qoriq-gpio",   },
	{}
};

static void __init mpc8xxx_add_controller(struct device_node *np)
{
	struct mpc8xxx_gpio_chip *mpc8xxx_gc;
	struct of_mm_gpio_chip *mm_gc;
	struct gpio_chip *gc;
	const struct of_device_id *id;
	unsigned hwirq;
	int ret;

	mpc8xxx_gc = kzalloc(sizeof(*mpc8xxx_gc), GFP_KERNEL);
	if (!mpc8xxx_gc) {
		ret = -ENOMEM;
		goto err;
	}

	spin_lock_init(&mpc8xxx_gc->lock);

	mm_gc = &mpc8xxx_gc->mm_gc;
	gc = &mm_gc->gc;

	mm_gc->save_regs = mpc8xxx_gpio_save_regs;
	gc->ngpio = MPC8XXX_GPIO_PINS;
	gc->direction_input = mpc8xxx_gpio_dir_in;
	gc->direction_output = of_device_is_compatible(np, "fsl,mpc5121-gpio") ?
		mpc5121_gpio_dir_out : mpc8xxx_gpio_dir_out;
	gc->get = of_device_is_compatible(np, "fsl,mpc8572-gpio") ?
		mpc8572_gpio_get : mpc8xxx_gpio_get;
	gc->set = mpc8xxx_gpio_set;
	gc->to_irq = mpc8xxx_gpio_to_irq;

	ret = of_mm_gpiochip_add(np, mm_gc);
	if (ret)
		goto err;

	hwirq = irq_of_parse_and_map(np, 0);
	if (hwirq == NO_IRQ)
		goto skip_irq;

	mpc8xxx_gc->irq = irq_domain_add_linear(np, MPC8XXX_GPIO_PINS,
					&mpc8xxx_gpio_irq_ops, mpc8xxx_gc);
	if (!mpc8xxx_gc->irq)
		goto skip_irq;

	id = of_match_node(mpc8xxx_gpio_ids, np);
	if (id)
		mpc8xxx_gc->of_dev_id_data = id->data;

	/* ack and mask all irqs */
	out_be32(mm_gc->regs + GPIO_IER, 0xffffffff);
	out_be32(mm_gc->regs + GPIO_IMR, 0);

	irq_set_handler_data(hwirq, mpc8xxx_gc);
	irq_set_chained_handler(hwirq, mpc8xxx_gpio_irq_cascade);

skip_irq:
	return;

err:
	pr_err("%s: registration failed with status %d\n",
	       np->full_name, ret);
	kfree(mpc8xxx_gc);

	return;
}

static int __init mpc8xxx_add_gpiochips(void)
{
	struct device_node *np;

	for_each_matching_node(np, mpc8xxx_gpio_ids)
		mpc8xxx_add_controller(np);

	return 0;
}
arch_initcall(mpc8xxx_add_gpiochips);
Commit	Line	Data
	1	/*
	2	* GPIOs on MPC512x/8349/8572/8610 and compatible
	3	*
	4	* Copyright (C) 2008 Peter Korsgaard <jacmet@sunsite.dk>
	5	*
	6	* This file is licensed under the terms of the GNU General Public License
	7	* version 2. This program is licensed "as is" without any warranty of any
	8	* kind, whether express or implied.
	9	*/
	10
	11	#include <linux/kernel.h>
	12	#include <linux/init.h>
	13	#include <linux/spinlock.h>
	14	#include <linux/io.h>
	15	#include <linux/of.h>
	16	#include <linux/of_gpio.h>
	17	#include <linux/gpio.h>
	18	#include <linux/slab.h>
	19	#include <linux/irq.h>
	20
	21	#define MPC8XXX_GPIO_PINS 32
	22
	23	#define GPIO_DIR 0x00
	24	#define GPIO_ODR 0x04
	25	#define GPIO_DAT 0x08
	26	#define GPIO_IER 0x0c
	27	#define GPIO_IMR 0x10
	28	#define GPIO_ICR 0x14
	29	#define GPIO_ICR2 0x18
	30
	31	struct mpc8xxx_gpio_chip {
	32	struct of_mm_gpio_chip mm_gc;
	33	spinlock_t lock;
	34
	35	/*
	36	* shadowed data register to be able to clear/set output pins in
	37	* open drain mode safely
	38	*/
	39	u32 data;
	40	struct irq_domain *irq;
	41	void *of_dev_id_data;
	42	};
	43
	44	static inline u32 mpc8xxx_gpio2mask(unsigned int gpio)
	45	{
	46	return 1u << (MPC8XXX_GPIO_PINS - 1 - gpio);
	47	}
	48
	49	static inline struct mpc8xxx_gpio_chip *
	50	to_mpc8xxx_gpio_chip(struct of_mm_gpio_chip *mm)
	51	{
	52	return container_of(mm, struct mpc8xxx_gpio_chip, mm_gc);
	53	}
	54
	55	static void mpc8xxx_gpio_save_regs(struct of_mm_gpio_chip *mm)
	56	{
	57	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	58
	59	mpc8xxx_gc->data = in_be32(mm->regs + GPIO_DAT);
	60	}
	61
	62	/* Workaround GPIO 1 errata on MPC8572/MPC8536. The status of GPIOs
	63	* defined as output cannot be determined by reading GPDAT register,
	64	* so we use shadow data register instead. The status of input pins
	65	* is determined by reading GPDAT register.
	66	*/
	67	static int mpc8572_gpio_get(struct gpio_chip *gc, unsigned int gpio)
	68	{
	69	u32 val;
	70	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	71	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	72
	73	val = in_be32(mm->regs + GPIO_DAT) & ~in_be32(mm->regs + GPIO_DIR);
	74
	75	return (val \| mpc8xxx_gc->data) & mpc8xxx_gpio2mask(gpio);
	76	}
	77
	78	static int mpc8xxx_gpio_get(struct gpio_chip *gc, unsigned int gpio)
	79	{
	80	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	81
	82	return in_be32(mm->regs + GPIO_DAT) & mpc8xxx_gpio2mask(gpio);
	83	}
	84
	85	static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
	86	{
	87	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	88	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	89	unsigned long flags;
	90
	91	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	92
	93	if (val)
	94	mpc8xxx_gc->data \|= mpc8xxx_gpio2mask(gpio);
	95	else
	96	mpc8xxx_gc->data &= ~mpc8xxx_gpio2mask(gpio);
	97
	98	out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data);
	99
	100	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	101	}
	102
	103	static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
	104	{
	105	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	106	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	107	unsigned long flags;
	108
	109	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	110
	111	clrbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
	112
	113	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	114
	115	return 0;
	116	}
	117
	118	static int mpc8xxx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
	119	{
	120	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	121	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	122	unsigned long flags;
	123
	124	mpc8xxx_gpio_set(gc, gpio, val);
	125
	126	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	127
	128	setbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
	129
	130	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	131
	132	return 0;
	133	}
	134
	135	static int mpc5121_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
	136	{
	137	/* GPIO 28..31 are input only on MPC5121 */
	138	if (gpio >= 28)
	139	return -EINVAL;
	140
	141	return mpc8xxx_gpio_dir_out(gc, gpio, val);
	142	}
	143
	144	static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
	145	{
	146	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
	147	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
	148
	149	if (mpc8xxx_gc->irq && offset < MPC8XXX_GPIO_PINS)
	150	return irq_create_mapping(mpc8xxx_gc->irq, offset);
	151	else
	152	return -ENXIO;
	153	}
	154
	155	static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
	156	{
	157	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_desc_get_handler_data(desc);
	158	struct irq_chip *chip = irq_desc_get_chip(desc);
	159	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	160	unsigned int mask;
	161
	162	mask = in_be32(mm->regs + GPIO_IER) & in_be32(mm->regs + GPIO_IMR);
	163	if (mask)
	164	generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
	165	32 - ffs(mask)));
	166	if (chip->irq_eoi)
	167	chip->irq_eoi(&desc->irq_data);
	168	}
	169
	170	static void mpc8xxx_irq_unmask(struct irq_data *d)
	171	{
	172	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	173	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	174	unsigned long flags;
	175
	176	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	177
	178	setbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
	179
	180	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	181	}
	182
	183	static void mpc8xxx_irq_mask(struct irq_data *d)
	184	{
	185	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	186	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	187	unsigned long flags;
	188
	189	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	190
	191	clrbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
	192
	193	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	194	}
	195
	196	static void mpc8xxx_irq_ack(struct irq_data *d)
	197	{
	198	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	199	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	200
	201	out_be32(mm->regs + GPIO_IER, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
	202	}
	203
	204	static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
	205	{
	206	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	207	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	208	unsigned long flags;
	209
	210	switch (flow_type) {
	211	case IRQ_TYPE_EDGE_FALLING:
	212	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	213	setbits32(mm->regs + GPIO_ICR,
	214	mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
	215	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	216	break;
	217
	218	case IRQ_TYPE_EDGE_BOTH:
	219	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	220	clrbits32(mm->regs + GPIO_ICR,
	221	mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
	222	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	223	break;
	224
	225	default:
	226	return -EINVAL;
	227	}
	228
	229	return 0;
	230	}
	231
	232	static int mpc512x_irq_set_type(struct irq_data *d, unsigned int flow_type)
	233	{
	234	struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
	235	struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
	236	unsigned long gpio = irqd_to_hwirq(d);
	237	void __iomem *reg;
	238	unsigned int shift;
	239	unsigned long flags;
	240
	241	if (gpio < 16) {
	242	reg = mm->regs + GPIO_ICR;
	243	shift = (15 - gpio) * 2;
	244	} else {
	245	reg = mm->regs + GPIO_ICR2;
	246	shift = (15 - (gpio % 16)) * 2;
	247	}
	248
	249	switch (flow_type) {
	250	case IRQ_TYPE_EDGE_FALLING:
	251	case IRQ_TYPE_LEVEL_LOW:
	252	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	253	clrsetbits_be32(reg, 3 << shift, 2 << shift);
	254	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	255	break;
	256
	257	case IRQ_TYPE_EDGE_RISING:
	258	case IRQ_TYPE_LEVEL_HIGH:
	259	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	260	clrsetbits_be32(reg, 3 << shift, 1 << shift);
	261	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	262	break;
	263
	264	case IRQ_TYPE_EDGE_BOTH:
	265	spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
	266	clrbits32(reg, 3 << shift);
	267	spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
	268	break;
	269
	270	default:
	271	return -EINVAL;
	272	}
	273
	274	return 0;
	275	}
	276
	277	static struct irq_chip mpc8xxx_irq_chip = {
	278	.name = "mpc8xxx-gpio",
	279	.irq_unmask = mpc8xxx_irq_unmask,
	280	.irq_mask = mpc8xxx_irq_mask,
	281	.irq_ack = mpc8xxx_irq_ack,
	282	.irq_set_type = mpc8xxx_irq_set_type,
	283	};
	284
	285	static int mpc8xxx_gpio_irq_map(struct irq_domain *h, unsigned int virq,
	286	irq_hw_number_t hw)
	287	{
	288	struct mpc8xxx_gpio_chip *mpc8xxx_gc = h->host_data;
	289
	290	if (mpc8xxx_gc->of_dev_id_data)
	291	mpc8xxx_irq_chip.irq_set_type = mpc8xxx_gc->of_dev_id_data;
	292
	293	irq_set_chip_data(virq, h->host_data);
	294	irq_set_chip_and_handler(virq, &mpc8xxx_irq_chip, handle_level_irq);
	295	irq_set_irq_type(virq, IRQ_TYPE_NONE);
	296
	297	return 0;
	298	}
	299
	300	static struct irq_domain_ops mpc8xxx_gpio_irq_ops = {
	301	.map = mpc8xxx_gpio_irq_map,
	302	.xlate = irq_domain_xlate_twocell,
	303	};
	304
	305	static struct of_device_id mpc8xxx_gpio_ids[] __initdata = {
	306	{ .compatible = "fsl,mpc8349-gpio", },
	307	{ .compatible = "fsl,mpc8572-gpio", },
	308	{ .compatible = "fsl,mpc8610-gpio", },
	309	{ .compatible = "fsl,mpc5121-gpio", .data = mpc512x_irq_set_type, },
	310	{ .compatible = "fsl,pq3-gpio", },
	311	{ .compatible = "fsl,qoriq-gpio", },
	312	{}
	313	};
	314
	315	static void __init mpc8xxx_add_controller(struct device_node *np)
	316	{
	317	struct mpc8xxx_gpio_chip *mpc8xxx_gc;
	318	struct of_mm_gpio_chip *mm_gc;
	319	struct gpio_chip *gc;
	320	const struct of_device_id *id;
	321	unsigned hwirq;
	322	int ret;
	323
	324	mpc8xxx_gc = kzalloc(sizeof(*mpc8xxx_gc), GFP_KERNEL);
	325	if (!mpc8xxx_gc) {
	326	ret = -ENOMEM;
	327	goto err;
	328	}
	329
	330	spin_lock_init(&mpc8xxx_gc->lock);
	331
	332	mm_gc = &mpc8xxx_gc->mm_gc;
	333	gc = &mm_gc->gc;
	334
	335	mm_gc->save_regs = mpc8xxx_gpio_save_regs;
	336	gc->ngpio = MPC8XXX_GPIO_PINS;
	337	gc->direction_input = mpc8xxx_gpio_dir_in;
	338	gc->direction_output = of_device_is_compatible(np, "fsl,mpc5121-gpio") ?
	339	mpc5121_gpio_dir_out : mpc8xxx_gpio_dir_out;
	340	gc->get = of_device_is_compatible(np, "fsl,mpc8572-gpio") ?
	341	mpc8572_gpio_get : mpc8xxx_gpio_get;
	342	gc->set = mpc8xxx_gpio_set;
	343	gc->to_irq = mpc8xxx_gpio_to_irq;
	344
	345	ret = of_mm_gpiochip_add(np, mm_gc);
	346	if (ret)
	347	goto err;
	348
	349	hwirq = irq_of_parse_and_map(np, 0);
	350	if (hwirq == NO_IRQ)
	351	goto skip_irq;
	352
	353	mpc8xxx_gc->irq = irq_domain_add_linear(np, MPC8XXX_GPIO_PINS,
	354	&mpc8xxx_gpio_irq_ops, mpc8xxx_gc);
	355	if (!mpc8xxx_gc->irq)
	356	goto skip_irq;
	357
	358	id = of_match_node(mpc8xxx_gpio_ids, np);
	359	if (id)
	360	mpc8xxx_gc->of_dev_id_data = id->data;
	361
	362	/* ack and mask all irqs */
	363	out_be32(mm_gc->regs + GPIO_IER, 0xffffffff);
	364	out_be32(mm_gc->regs + GPIO_IMR, 0);
	365
	366	irq_set_handler_data(hwirq, mpc8xxx_gc);
	367	irq_set_chained_handler(hwirq, mpc8xxx_gpio_irq_cascade);
	368
	369	skip_irq:
	370	return;
	371
	372	err:
	373	pr_err("%s: registration failed with status %d\n",
	374	np->full_name, ret);
	375	kfree(mpc8xxx_gc);
	376
	377	return;
	378	}
	379
	380	static int __init mpc8xxx_add_gpiochips(void)
	381	{
	382	struct device_node *np;
	383
	384	for_each_matching_node(np, mpc8xxx_gpio_ids)
	385	mpc8xxx_add_controller(np);
	386
	387	return 0;
	388	}
	389	arch_initcall(mpc8xxx_add_gpiochips);