2 * arch/arm/mach-netx/generic.c
4 * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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.
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.
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
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>
25 #include <asm/hardware.h>
26 #include <asm/mach/map.h>
27 #include <asm/hardware/vic.h>
29 #include <asm/arch/netx-regs.h>
30 #include <asm/mach/irq.h>
32 static struct map_desc netx_io_desc[] __initdata = {
34 .virtual = NETX_IO_VIRT,
35 .pfn = __phys_to_pfn(NETX_IO_PHYS),
36 .length = NETX_IO_SIZE,
41 void __init netx_map_io(void)
43 iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc));
46 static struct resource netx_rtc_resources[] = {
50 .flags = IORESOURCE_MEM,
54 static struct platform_device netx_rtc_device = {
57 .num_resources = ARRAY_SIZE(netx_rtc_resources),
58 .resource = netx_rtc_resources,
61 static struct platform_device *devices[] __initdata = {
66 #define DEBUG_IRQ(fmt...) printk(fmt)
68 #define DEBUG_IRQ(fmt...) while (0) {}
72 netx_hif_demux_handler(unsigned int irq_unused, struct irqdesc *desc,
75 unsigned int irq = NETX_IRQ_HIF_CHAINED(0);
78 stat = ((readl(NETX_DPMAS_INT_EN) &
79 readl(NETX_DPMAS_INT_STAT)) >> 24) & 0x1f;
81 desc = irq_desc + NETX_IRQ_HIF_CHAINED(0);
85 DEBUG_IRQ("handling irq %d\n", irq);
86 desc_handle_irq(irq, desc, regs);
95 netx_hif_irq_type(unsigned int _irq, unsigned int type)
97 unsigned int val, irq;
99 val = readl(NETX_DPMAS_IF_CONF1);
101 irq = _irq - NETX_IRQ_HIF_CHAINED(0);
103 if (type & __IRQT_RISEDGE) {
104 DEBUG_IRQ("rising edges\n");
105 val |= (1 << 26) << irq;
107 if (type & __IRQT_FALEDGE) {
108 DEBUG_IRQ("falling edges\n");
109 val &= ~((1 << 26) << irq);
111 if (type & __IRQT_LOWLVL) {
112 DEBUG_IRQ("low level\n");
113 val &= ~((1 << 26) << irq);
115 if (type & __IRQT_HIGHLVL) {
116 DEBUG_IRQ("high level\n");
117 val |= (1 << 26) << irq;
120 writel(val, NETX_DPMAS_IF_CONF1);
126 netx_hif_ack_irq(unsigned int _irq)
128 unsigned int val, irq;
130 irq = _irq - NETX_IRQ_HIF_CHAINED(0);
131 writel((1 << 24) << irq, NETX_DPMAS_INT_STAT);
133 val = readl(NETX_DPMAS_INT_EN);
134 val &= ~((1 << 24) << irq);
135 writel(val, NETX_DPMAS_INT_EN);
137 DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
141 netx_hif_mask_irq(unsigned int _irq)
143 unsigned int val, irq;
145 irq = _irq - NETX_IRQ_HIF_CHAINED(0);
146 val = readl(NETX_DPMAS_INT_EN);
147 val &= ~((1 << 24) << irq);
148 writel(val, NETX_DPMAS_INT_EN);
149 DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
153 netx_hif_unmask_irq(unsigned int _irq)
155 unsigned int val, irq;
157 irq = _irq - NETX_IRQ_HIF_CHAINED(0);
158 val = readl(NETX_DPMAS_INT_EN);
159 val |= (1 << 24) << irq;
160 writel(val, NETX_DPMAS_INT_EN);
161 DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq);
164 static struct irqchip netx_hif_chip = {
165 .ack = netx_hif_ack_irq,
166 .mask = netx_hif_mask_irq,
167 .unmask = netx_hif_unmask_irq,
168 .set_type = netx_hif_irq_type,
171 void __init netx_init_irq(void)
175 vic_init(__io(io_p2v(NETX_PA_VIC)), 0, ~0);
177 for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) {
178 set_irq_chip(irq, &netx_hif_chip);
179 set_irq_handler(irq, do_level_IRQ);
180 set_irq_flags(irq, IRQF_VALID);
183 writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN);
184 set_irq_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler);
187 static int __init netx_init(void)
189 return platform_add_devices(devices, ARRAY_SIZE(devices));
192 subsys_initcall(netx_init);