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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> | |
25 | #include <asm/hardware.h> | |
26 | #include <asm/mach/map.h> | |
27 | #include <asm/hardware/vic.h> | |
28 | #include <asm/io.h> | |
29 | #include <asm/arch/netx-regs.h> | |
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 | |
0cd61b68 | 72 | netx_hif_demux_handler(unsigned int irq_unused, struct irqdesc *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 | ||
102 | if (type & __IRQT_RISEDGE) { | |
103 | DEBUG_IRQ("rising edges\n"); | |
104 | val |= (1 << 26) << irq; | |
105 | } | |
106 | if (type & __IRQT_FALEDGE) { | |
107 | DEBUG_IRQ("falling edges\n"); | |
108 | val &= ~((1 << 26) << irq); | |
109 | } | |
110 | if (type & __IRQT_LOWLVL) { | |
111 | DEBUG_IRQ("low level\n"); | |
112 | val &= ~((1 << 26) << irq); | |
113 | } | |
114 | if (type & __IRQT_HIGHLVL) { | |
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 | ||
136 | DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq); | |
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); | |
148 | DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq); | |
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); | |
160 | DEBUG_IRQ("%s: irq %d\n", __FUNCTION__, _irq); | |
161 | } | |
162 | ||
163 | static struct irqchip netx_hif_chip = { | |
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); | |
178 | set_irq_handler(irq, do_level_IRQ); | |
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 |