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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> | |
fced80c7 | 25 | #include <linux/io.h> |
9e47b8bf | 26 | #include <linux/irqchip/arm-vic.h> |
7b6d864b | 27 | #include <linux/reboot.h> |
a09e64fb | 28 | #include <mach/hardware.h> |
bb6d8c88 | 29 | #include <asm/mach/map.h> |
a09e64fb | 30 | #include <mach/netx-regs.h> |
bb6d8c88 SH |
31 | #include <asm/mach/irq.h> |
32 | ||
33 | static struct map_desc netx_io_desc[] __initdata = { | |
34 | { | |
35 | .virtual = NETX_IO_VIRT, | |
36 | .pfn = __phys_to_pfn(NETX_IO_PHYS), | |
37 | .length = NETX_IO_SIZE, | |
38 | .type = MT_DEVICE | |
39 | } | |
40 | }; | |
41 | ||
42 | void __init netx_map_io(void) | |
43 | { | |
44 | iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc)); | |
45 | } | |
46 | ||
47 | static struct resource netx_rtc_resources[] = { | |
48 | [0] = { | |
49 | .start = 0x00101200, | |
50 | .end = 0x00101220, | |
51 | .flags = IORESOURCE_MEM, | |
52 | }, | |
53 | }; | |
54 | ||
55 | static struct platform_device netx_rtc_device = { | |
56 | .name = "netx-rtc", | |
57 | .id = 0, | |
58 | .num_resources = ARRAY_SIZE(netx_rtc_resources), | |
59 | .resource = netx_rtc_resources, | |
60 | }; | |
61 | ||
62 | static struct platform_device *devices[] __initdata = { | |
63 | &netx_rtc_device, | |
64 | }; | |
65 | ||
66 | #if 0 | |
67 | #define DEBUG_IRQ(fmt...) printk(fmt) | |
68 | #else | |
69 | #define DEBUG_IRQ(fmt...) while (0) {} | |
70 | #endif | |
71 | ||
bd0b9ac4 | 72 | static void netx_hif_demux_handler(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 | ||
bb6d8c88 SH |
80 | while (stat) { |
81 | if (stat & 1) { | |
82 | DEBUG_IRQ("handling irq %d\n", irq); | |
d8aa0251 | 83 | generic_handle_irq(irq); |
bb6d8c88 SH |
84 | } |
85 | irq++; | |
bb6d8c88 SH |
86 | stat >>= 1; |
87 | } | |
88 | } | |
89 | ||
90 | static int | |
4f8d7541 | 91 | netx_hif_irq_type(struct irq_data *d, unsigned int type) |
bb6d8c88 SH |
92 | { |
93 | unsigned int val, irq; | |
94 | ||
95 | val = readl(NETX_DPMAS_IF_CONF1); | |
96 | ||
4f8d7541 | 97 | irq = d->irq - NETX_IRQ_HIF_CHAINED(0); |
bb6d8c88 | 98 | |
6cab4860 | 99 | if (type & IRQ_TYPE_EDGE_RISING) { |
bb6d8c88 SH |
100 | DEBUG_IRQ("rising edges\n"); |
101 | val |= (1 << 26) << irq; | |
102 | } | |
6cab4860 | 103 | if (type & IRQ_TYPE_EDGE_FALLING) { |
bb6d8c88 SH |
104 | DEBUG_IRQ("falling edges\n"); |
105 | val &= ~((1 << 26) << irq); | |
106 | } | |
6cab4860 | 107 | if (type & IRQ_TYPE_LEVEL_LOW) { |
bb6d8c88 SH |
108 | DEBUG_IRQ("low level\n"); |
109 | val &= ~((1 << 26) << irq); | |
110 | } | |
6cab4860 | 111 | if (type & IRQ_TYPE_LEVEL_HIGH) { |
bb6d8c88 SH |
112 | DEBUG_IRQ("high level\n"); |
113 | val |= (1 << 26) << irq; | |
114 | } | |
115 | ||
116 | writel(val, NETX_DPMAS_IF_CONF1); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static void | |
4f8d7541 | 122 | netx_hif_ack_irq(struct irq_data *d) |
bb6d8c88 SH |
123 | { |
124 | unsigned int val, irq; | |
125 | ||
4f8d7541 | 126 | irq = d->irq - NETX_IRQ_HIF_CHAINED(0); |
bb6d8c88 SH |
127 | writel((1 << 24) << irq, NETX_DPMAS_INT_STAT); |
128 | ||
129 | val = readl(NETX_DPMAS_INT_EN); | |
130 | val &= ~((1 << 24) << irq); | |
131 | writel(val, NETX_DPMAS_INT_EN); | |
132 | ||
4f8d7541 | 133 | DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); |
bb6d8c88 SH |
134 | } |
135 | ||
136 | static void | |
4f8d7541 | 137 | netx_hif_mask_irq(struct irq_data *d) |
bb6d8c88 SH |
138 | { |
139 | unsigned int val, irq; | |
140 | ||
4f8d7541 | 141 | irq = d->irq - NETX_IRQ_HIF_CHAINED(0); |
bb6d8c88 SH |
142 | val = readl(NETX_DPMAS_INT_EN); |
143 | val &= ~((1 << 24) << irq); | |
144 | writel(val, NETX_DPMAS_INT_EN); | |
4f8d7541 | 145 | DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); |
bb6d8c88 SH |
146 | } |
147 | ||
148 | static void | |
4f8d7541 | 149 | netx_hif_unmask_irq(struct irq_data *d) |
bb6d8c88 SH |
150 | { |
151 | unsigned int val, irq; | |
152 | ||
4f8d7541 | 153 | irq = d->irq - NETX_IRQ_HIF_CHAINED(0); |
bb6d8c88 SH |
154 | val = readl(NETX_DPMAS_INT_EN); |
155 | val |= (1 << 24) << irq; | |
156 | writel(val, NETX_DPMAS_INT_EN); | |
4f8d7541 | 157 | DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); |
bb6d8c88 SH |
158 | } |
159 | ||
10dd5ce2 | 160 | static struct irq_chip netx_hif_chip = { |
4f8d7541 LB |
161 | .irq_ack = netx_hif_ack_irq, |
162 | .irq_mask = netx_hif_mask_irq, | |
163 | .irq_unmask = netx_hif_unmask_irq, | |
164 | .irq_set_type = netx_hif_irq_type, | |
bb6d8c88 SH |
165 | }; |
166 | ||
167 | void __init netx_init_irq(void) | |
168 | { | |
169 | int irq; | |
170 | ||
30a1b5ef | 171 | vic_init(io_p2v(NETX_PA_VIC), NETX_IRQ_VIC_START, ~0, 0); |
bb6d8c88 SH |
172 | |
173 | for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) { | |
f38c02f3 TG |
174 | irq_set_chip_and_handler(irq, &netx_hif_chip, |
175 | handle_level_irq); | |
e8d36d5d | 176 | irq_clear_status_flags(irq, IRQ_NOREQUEST); |
bb6d8c88 SH |
177 | } |
178 | ||
179 | writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN); | |
6845664a | 180 | irq_set_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler); |
bb6d8c88 SH |
181 | } |
182 | ||
183 | static int __init netx_init(void) | |
184 | { | |
185 | return platform_add_devices(devices, ARRAY_SIZE(devices)); | |
186 | } | |
187 | ||
188 | subsys_initcall(netx_init); | |
189 | ||
7b6d864b | 190 | void netx_restart(enum reboot_mode mode, const char *cmd) |
8fb06b12 RK |
191 | { |
192 | writel(NETX_SYSTEM_RES_CR_FIRMW_RES_EN | NETX_SYSTEM_RES_CR_FIRMW_RES, | |
193 | NETX_SYSTEM_RES_CR); | |
194 | } |