Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 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 |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame^] | 72 | netx_hif_demux_handler(unsigned int irq_unused, struct irqdesc *desc) |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 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); |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame^] | 85 | desc_handle_irq(irq, desc); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 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 | |