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> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 25 | #include <linux/io.h> |
Rob Herring | 9e47b8b | 2013-01-07 09:45:59 -0600 | [diff] [blame] | 26 | #include <linux/irqchip/arm-vic.h> |
Robin Holt | 7b6d864 | 2013-07-08 16:01:40 -0700 | [diff] [blame] | 27 | #include <linux/reboot.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 28 | #include <mach/hardware.h> |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 29 | #include <asm/mach/map.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 30 | #include <mach/netx-regs.h> |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 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 | |
Thomas Gleixner | bd0b9ac | 2015-09-14 10:42:37 +0200 | [diff] [blame] | 72 | static void netx_hif_demux_handler(struct irq_desc *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 | |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 80 | while (stat) { |
| 81 | if (stat & 1) { |
| 82 | DEBUG_IRQ("handling irq %d\n", irq); |
Dmitry Baryshkov | d8aa025 | 2008-10-09 13:36:24 +0100 | [diff] [blame] | 83 | generic_handle_irq(irq); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 84 | } |
| 85 | irq++; |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 86 | stat >>= 1; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | static int |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 91 | netx_hif_irq_type(struct irq_data *d, unsigned int type) |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 92 | { |
| 93 | unsigned int val, irq; |
| 94 | |
| 95 | val = readl(NETX_DPMAS_IF_CONF1); |
| 96 | |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 97 | irq = d->irq - NETX_IRQ_HIF_CHAINED(0); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 98 | |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 99 | if (type & IRQ_TYPE_EDGE_RISING) { |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 100 | DEBUG_IRQ("rising edges\n"); |
| 101 | val |= (1 << 26) << irq; |
| 102 | } |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 103 | if (type & IRQ_TYPE_EDGE_FALLING) { |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 104 | DEBUG_IRQ("falling edges\n"); |
| 105 | val &= ~((1 << 26) << irq); |
| 106 | } |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 107 | if (type & IRQ_TYPE_LEVEL_LOW) { |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 108 | DEBUG_IRQ("low level\n"); |
| 109 | val &= ~((1 << 26) << irq); |
| 110 | } |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 111 | if (type & IRQ_TYPE_LEVEL_HIGH) { |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 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 |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 122 | netx_hif_ack_irq(struct irq_data *d) |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 123 | { |
| 124 | unsigned int val, irq; |
| 125 | |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 126 | irq = d->irq - NETX_IRQ_HIF_CHAINED(0); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 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 | |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 133 | DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | static void |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 137 | netx_hif_mask_irq(struct irq_data *d) |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 138 | { |
| 139 | unsigned int val, irq; |
| 140 | |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 141 | irq = d->irq - NETX_IRQ_HIF_CHAINED(0); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 142 | val = readl(NETX_DPMAS_INT_EN); |
| 143 | val &= ~((1 << 24) << irq); |
| 144 | writel(val, NETX_DPMAS_INT_EN); |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 145 | DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | static void |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 149 | netx_hif_unmask_irq(struct irq_data *d) |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 150 | { |
| 151 | unsigned int val, irq; |
| 152 | |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 153 | irq = d->irq - NETX_IRQ_HIF_CHAINED(0); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 154 | val = readl(NETX_DPMAS_INT_EN); |
| 155 | val |= (1 << 24) << irq; |
| 156 | writel(val, NETX_DPMAS_INT_EN); |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 157 | DEBUG_IRQ("%s: irq %d\n", __func__, d->irq); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 158 | } |
| 159 | |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 160 | static struct irq_chip netx_hif_chip = { |
Lennert Buytenhek | 4f8d754 | 2010-11-29 10:38:10 +0100 | [diff] [blame] | 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, |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 165 | }; |
| 166 | |
| 167 | void __init netx_init_irq(void) |
| 168 | { |
| 169 | int irq; |
| 170 | |
Linus Walleij | 30a1b5e | 2013-02-08 23:02:33 +0100 | [diff] [blame] | 171 | vic_init(io_p2v(NETX_PA_VIC), NETX_IRQ_VIC_START, ~0, 0); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 172 | |
| 173 | for (irq = NETX_IRQ_HIF_CHAINED(0); irq <= NETX_IRQ_HIF_LAST; irq++) { |
Thomas Gleixner | f38c02f | 2011-03-24 13:35:09 +0100 | [diff] [blame] | 174 | irq_set_chip_and_handler(irq, &netx_hif_chip, |
| 175 | handle_level_irq); |
Rob Herring | e8d36d5 | 2015-07-27 15:55:13 -0500 | [diff] [blame] | 176 | irq_clear_status_flags(irq, IRQ_NOREQUEST); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | writel(NETX_DPMAS_INT_EN_GLB_EN, NETX_DPMAS_INT_EN); |
Thomas Gleixner | 6845664a | 2011-03-24 13:25:22 +0100 | [diff] [blame] | 180 | irq_set_chained_handler(NETX_IRQ_HIF, netx_hif_demux_handler); |
Sascha Hauer | bb6d8c8 | 2006-06-19 15:27:53 +0100 | [diff] [blame] | 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 | |
Robin Holt | 7b6d864 | 2013-07-08 16:01:40 -0700 | [diff] [blame] | 190 | void netx_restart(enum reboot_mode mode, const char *cmd) |
Russell King | 8fb06b1 | 2011-11-11 15:12:17 +0000 | [diff] [blame] | 191 | { |
| 192 | writel(NETX_SYSTEM_RES_CR_FIRMW_RES_EN | NETX_SYSTEM_RES_CR_FIRMW_RES, |
| 193 | NETX_SYSTEM_RES_CR); |
| 194 | } |