[mirror_ubuntu-zesty-kernel.git] / arch / arm / mach-netx / generic.c

/*
 * arch/arm/mach-netx/generic.c
 *
 * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * 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/device.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <mach/hardware.h>
#include <asm/mach/map.h>
#include <asm/hardware/vic.h>
#include <asm/io.h>
#include <mach/netx-regs.h>
#include <asm/mach/irq.h>

static struct map_desc netx_io_desc[] __initdata = {
	{
		.virtual        = NETX_IO_VIRT,
		.pfn            = __phys_to_pfn(NETX_IO_PHYS),
		.length         = NETX_IO_SIZE,
		.type           = MT_DEVICE
	}
};

void __init netx_map_io(void)
{
	iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc));
}

static struct resource netx_rtc_resources[] = {
	[0] = {
		.start	= 0x00101200,
		.end	= 0x00101220,
		.flags	= IORESOURCE_MEM,
	},
};

static struct platform_device netx_rtc_device = {
	.name		= "netx-rtc",
	.id		= 0,
	.num_resources	= ARRAY_SIZE(netx_rtc_resources),
	.resource	= netx_rtc_resources,
};

static struct platform_device *devices[] __initdata = {
	&netx_rtc_device,
};

#if 0
#define DEBUG_IRQ(fmt...)	printk(fmt)
#else
#define DEBUG_IRQ(fmt...)	while (0) {}
#endif

static void
netx_hif_demux_handler(unsigned int irq_unused, struct irq_desc *desc)
{
	unsigned int irq = NETX_IRQ_HIF_CHAINED(0);
	unsigned int stat;

	stat = ((readl(NETX_DPMAS_INT_EN) &
		readl(NETX_DPMAS_INT_STAT)) >> 24) & 0x1f;

	desc = irq_desc + NETX_IRQ_HIF_CHAINED(0);

	while (stat) {
		if (stat & 1) {
			DEBUG_IRQ("handling irq %d\n", irq);
			desc_handle_irq(irq, desc);
		}
		irq++;
		desc++;
		stat >>= 1;
	}
}

static int
netx_hif_irq_type(unsigned int _irq, unsigned int type)
{
	unsigned int val, irq;

	val = readl(NETX_DPMAS_IF_CONF1);

	irq = _irq - NETX_IRQ_HIF_CHAINED(0);

	if (type & IRQ_TYPE_EDGE_RISING) {
		DEBUG_IRQ("rising edges\n");
		val |= (1 << 26) << irq;
	}
	if (type & IRQ_TYPE_EDGE_FALLING) {
		DEBUG_IRQ("falling edges\n");
		val &= ~((1 << 26) << irq);
	}
	if (type & IRQ_TYPE_LEVEL_LOW) {
		DEBUG_IRQ("low level\n");
		val &= ~((1 << 26) << irq);
	}
	if (type & IRQ_TYPE_LEVEL_HIGH) {
		DEBUG_IRQ("high level\n");
		val |= (1 << 26) << irq;
	}

	writel(val, NETX_DPMAS_IF_CONF1);

	return 0;
}

static void
netx_hif_ack_irq(unsigned int _irq)
{
	unsigned int val, irq;

	irq = _irq - NETX_IRQ_HIF_CHAINED(0);
	writel((1 << 24) << irq, NETX_DPMAS_INT_STAT);

	val = readl(NETX_DPMAS_INT_EN);
	val &= ~((1 << 24) << irq);
	writel(val, NETX_DPMAS_INT_EN);

	DEBUG_IRQ("%s: irq %d\n", __func__, _irq);
}

static void
netx_hif_mask_irq(unsigned int _irq)
{
	unsigned int val, irq;

	irq = _irq - NETX_IRQ_HIF_CHAINED(0);
	val = readl(NETX_DPMAS_INT_EN);
	val &= ~((1 << 24) << irq);
	writel(val, NETX_DPMAS_INT_EN);
	DEBUG_IRQ("%s: irq %d\n", __func__, _irq);
}

static void
netx_hif_unmask_irq(unsigned int _irq)
{
	unsigned int val, irq;

	irq = _irq - NETX_IRQ_HIF_CHAINED(0);
	val = readl(NETX_DPMAS_INT_EN);
	val |= (1 << 24) << irq;
	writel(val, NETX_DPMAS_INT_EN);
	DEBUG_IRQ("%s: irq %d\n", __func__, _irq);
}

static struct irq_chip netx_hif_chip = {
	.ack = netx_hif_ack_irq,
	.mask = netx_hif_mask_irq,
	.unmask = netx_hif_unmask_irq,
	.set_type = netx_hif_irq_type,
};

void __init netx_init_irq(void)
{
	int irq;

	vic_init(__io(io_p2v(NETX_PA_VIC)), 0, ~0);

	for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) {
		set_irq_chip(irq, &netx_hif_chip);
		set_irq_handler(irq, handle_level_irq);
		set_irq_flags(irq, IRQF_VALID);
	}

	writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN);
	set_irq_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler);
}

static int __init netx_init(void)
{
	return platform_add_devices(devices, ARRAY_SIZE(devices));
}

subsys_initcall(netx_init);
Commit	Line	Data
bb6d8c88 SH	1	/*
	2	* arch/arm/mach-netx/generic.c
	3	*
	4	* Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*/
	19
	20	#include <linux/device.h>
	21	#include <linux/init.h>
	22	#include <linux/kernel.h>
	23	#include <linux/module.h>
	24	#include <linux/platform_device.h>
a09e64fb	25	#include <mach/hardware.h>
bb6d8c88 SH	26	#include <asm/mach/map.h>
	27	#include <asm/hardware/vic.h>
	28	#include <asm/io.h>
a09e64fb	29	#include <mach/netx-regs.h>
bb6d8c88 SH	30	#include <asm/mach/irq.h>
	31
	32	static struct map_desc netx_io_desc[] __initdata = {
	33	{
	34	.virtual = NETX_IO_VIRT,
	35	.pfn = __phys_to_pfn(NETX_IO_PHYS),
	36	.length = NETX_IO_SIZE,
	37	.type = MT_DEVICE
	38	}
	39	};
	40
	41	void __init netx_map_io(void)
	42	{
	43	iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc));
	44	}
	45
	46	static struct resource netx_rtc_resources[] = {
	47	[0] = {
	48	.start = 0x00101200,
	49	.end = 0x00101220,
	50	.flags = IORESOURCE_MEM,
	51	},
	52	};
	53
	54	static struct platform_device netx_rtc_device = {
	55	.name = "netx-rtc",
	56	.id = 0,
	57	.num_resources = ARRAY_SIZE(netx_rtc_resources),
	58	.resource = netx_rtc_resources,
	59	};
	60
	61	static struct platform_device *devices[] __initdata = {
	62	&netx_rtc_device,
	63	};
	64
	65	#if 0
	66	#define DEBUG_IRQ(fmt...) printk(fmt)
	67	#else
	68	#define DEBUG_IRQ(fmt...) while (0) {}
	69	#endif
	70
	71	static void
10dd5ce2	72	netx_hif_demux_handler(unsigned int irq_unused, struct irq_desc *desc)
bb6d8c88 SH	73	{
	74	unsigned int irq = NETX_IRQ_HIF_CHAINED(0);
	75	unsigned int stat;
	76
	77	stat = ((readl(NETX_DPMAS_INT_EN) &
	78	readl(NETX_DPMAS_INT_STAT)) >> 24) & 0x1f;
	79
	80	desc = irq_desc + NETX_IRQ_HIF_CHAINED(0);
	81
	82	while (stat) {
	83	if (stat & 1) {
	84	DEBUG_IRQ("handling irq %d\n", irq);
0cd61b68	85	desc_handle_irq(irq, desc);
bb6d8c88 SH	86	}
	87	irq++;
	88	desc++;
	89	stat >>= 1;
	90	}
	91	}
	92
	93	static int
	94	netx_hif_irq_type(unsigned int _irq, unsigned int type)
	95	{
	96	unsigned int val, irq;
	97
	98	val = readl(NETX_DPMAS_IF_CONF1);
	99
	100	irq = _irq - NETX_IRQ_HIF_CHAINED(0);
	101
6cab4860	102	if (type & IRQ_TYPE_EDGE_RISING) {
bb6d8c88 SH	103	DEBUG_IRQ("rising edges\n");
	104	val \|= (1 << 26) << irq;
	105	}
6cab4860	106	if (type & IRQ_TYPE_EDGE_FALLING) {
bb6d8c88 SH	107	DEBUG_IRQ("falling edges\n");
	108	val &= ~((1 << 26) << irq);
	109	}
6cab4860	110	if (type & IRQ_TYPE_LEVEL_LOW) {
bb6d8c88 SH	111	DEBUG_IRQ("low level\n");
	112	val &= ~((1 << 26) << irq);
	113	}
6cab4860	114	if (type & IRQ_TYPE_LEVEL_HIGH) {
bb6d8c88 SH	115	DEBUG_IRQ("high level\n");
	116	val \|= (1 << 26) << irq;
	117	}
	118
	119	writel(val, NETX_DPMAS_IF_CONF1);
	120
	121	return 0;
	122	}
	123
	124	static void
	125	netx_hif_ack_irq(unsigned int _irq)
	126	{
	127	unsigned int val, irq;
	128
	129	irq = _irq - NETX_IRQ_HIF_CHAINED(0);
	130	writel((1 << 24) << irq, NETX_DPMAS_INT_STAT);
	131
	132	val = readl(NETX_DPMAS_INT_EN);
	133	val &= ~((1 << 24) << irq);
	134	writel(val, NETX_DPMAS_INT_EN);
	135
8e86f427	136	DEBUG_IRQ("%s: irq %d\n", __func__, _irq);
bb6d8c88 SH	137	}
	138
	139	static void
	140	netx_hif_mask_irq(unsigned int _irq)
	141	{
	142	unsigned int val, irq;
	143
	144	irq = _irq - NETX_IRQ_HIF_CHAINED(0);
	145	val = readl(NETX_DPMAS_INT_EN);
	146	val &= ~((1 << 24) << irq);
	147	writel(val, NETX_DPMAS_INT_EN);
8e86f427	148	DEBUG_IRQ("%s: irq %d\n", __func__, _irq);
bb6d8c88 SH	149	}
	150
	151	static void
	152	netx_hif_unmask_irq(unsigned int _irq)
	153	{
	154	unsigned int val, irq;
	155
	156	irq = _irq - NETX_IRQ_HIF_CHAINED(0);
	157	val = readl(NETX_DPMAS_INT_EN);
	158	val \|= (1 << 24) << irq;
	159	writel(val, NETX_DPMAS_INT_EN);
8e86f427	160	DEBUG_IRQ("%s: irq %d\n", __func__, _irq);
bb6d8c88 SH	161	}
bb6d8c88 SH	162
10dd5ce2	163	static struct irq_chip netx_hif_chip = {
bb6d8c88 SH	164	.ack = netx_hif_ack_irq,
	165	.mask = netx_hif_mask_irq,
	166	.unmask = netx_hif_unmask_irq,
	167	.set_type = netx_hif_irq_type,
	168	};
	169
	170	void __init netx_init_irq(void)
	171	{
	172	int irq;
	173
	174	vic_init(__io(io_p2v(NETX_PA_VIC)), 0, ~0);
	175
	176	for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) {
	177	set_irq_chip(irq, &netx_hif_chip);
10dd5ce2	178	set_irq_handler(irq, handle_level_irq);
bb6d8c88 SH	179	set_irq_flags(irq, IRQF_VALID);
	180	}
	181
	182	writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN);
	183	set_irq_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler);
	184	}
	185
	186	static int __init netx_init(void)
	187	{
	188	return platform_add_devices(devices, ARRAY_SIZE(devices));
	189	}
	190
	191	subsys_initcall(netx_init);
	192