Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Lennert Buytenhek | fa87ced | 2005-11-01 19:44:27 +0000 | [diff] [blame] | 2 | * arch/arm/mach-ixp2000/core.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Common routines used by all IXP2400/2800 based platforms. |
| 5 | * |
| 6 | * Author: Deepak Saxena <dsaxena@plexity.net> |
| 7 | * |
| 8 | * Copyright 2004 (C) MontaVista Software, Inc. |
| 9 | * |
| 10 | * Based on work Copyright (C) 2002-2003 Intel Corporation |
| 11 | * |
| 12 | * This file is licensed under the terms of the GNU General Public |
| 13 | * License version 2. This program is licensed "as is" without any |
| 14 | * warranty of any kind, whether express or implied. |
| 15 | */ |
Russell King | 2f8163b | 2011-07-26 10:53:52 +0100 | [diff] [blame] | 16 | #include <linux/gpio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/kernel.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/spinlock.h> |
| 20 | #include <linux/sched.h> |
| 21 | #include <linux/interrupt.h> |
Thomas Gleixner | 64ffae8 | 2006-07-01 22:32:18 +0100 | [diff] [blame] | 22 | #include <linux/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/serial.h> |
| 24 | #include <linux/tty.h> |
| 25 | #include <linux/bitops.h> |
Lennert Buytenhek | 28187f2 | 2005-07-10 19:44:53 +0100 | [diff] [blame] | 26 | #include <linux/serial_8250.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/mm.h> |
Paul Gortmaker | dc28094 | 2011-07-31 16:17:29 -0400 | [diff] [blame] | 28 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | #include <asm/types.h> |
| 31 | #include <asm/setup.h> |
| 32 | #include <asm/memory.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 33 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <asm/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/tlbflush.h> |
| 36 | #include <asm/pgtable.h> |
| 37 | |
| 38 | #include <asm/mach/map.h> |
| 39 | #include <asm/mach/time.h> |
| 40 | #include <asm/mach/irq.h> |
| 41 | |
Linus Walleij | 87f911a | 2011-08-22 08:44:18 +0100 | [diff] [blame] | 42 | #include <mach/gpio-ixp2000.h> |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | static DEFINE_SPINLOCK(ixp2000_slowport_lock); |
| 45 | static unsigned long ixp2000_slowport_irq_flags; |
| 46 | |
| 47 | /************************************************************************* |
| 48 | * Slowport access routines |
| 49 | *************************************************************************/ |
| 50 | void ixp2000_acquire_slowport(struct slowport_cfg *new_cfg, struct slowport_cfg *old_cfg) |
| 51 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | spin_lock_irqsave(&ixp2000_slowport_lock, ixp2000_slowport_irq_flags); |
| 53 | |
| 54 | old_cfg->CCR = *IXP2000_SLOWPORT_CCR; |
| 55 | old_cfg->WTC = *IXP2000_SLOWPORT_WTC2; |
| 56 | old_cfg->RTC = *IXP2000_SLOWPORT_RTC2; |
| 57 | old_cfg->PCR = *IXP2000_SLOWPORT_PCR; |
| 58 | old_cfg->ADC = *IXP2000_SLOWPORT_ADC; |
| 59 | |
| 60 | ixp2000_reg_write(IXP2000_SLOWPORT_CCR, new_cfg->CCR); |
| 61 | ixp2000_reg_write(IXP2000_SLOWPORT_WTC2, new_cfg->WTC); |
| 62 | ixp2000_reg_write(IXP2000_SLOWPORT_RTC2, new_cfg->RTC); |
| 63 | ixp2000_reg_write(IXP2000_SLOWPORT_PCR, new_cfg->PCR); |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 64 | ixp2000_reg_wrb(IXP2000_SLOWPORT_ADC, new_cfg->ADC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | void ixp2000_release_slowport(struct slowport_cfg *old_cfg) |
| 68 | { |
| 69 | ixp2000_reg_write(IXP2000_SLOWPORT_CCR, old_cfg->CCR); |
| 70 | ixp2000_reg_write(IXP2000_SLOWPORT_WTC2, old_cfg->WTC); |
| 71 | ixp2000_reg_write(IXP2000_SLOWPORT_RTC2, old_cfg->RTC); |
| 72 | ixp2000_reg_write(IXP2000_SLOWPORT_PCR, old_cfg->PCR); |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 73 | ixp2000_reg_wrb(IXP2000_SLOWPORT_ADC, old_cfg->ADC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | spin_unlock_irqrestore(&ixp2000_slowport_lock, |
| 76 | ixp2000_slowport_irq_flags); |
| 77 | } |
| 78 | |
| 79 | /************************************************************************* |
| 80 | * Chip specific mappings shared by all IXP2000 systems |
| 81 | *************************************************************************/ |
| 82 | static struct map_desc ixp2000_io_desc[] __initdata = { |
| 83 | { |
| 84 | .virtual = IXP2000_CAP_VIRT_BASE, |
Deepak Saxena | db0d087 | 2005-10-28 15:18:58 +0100 | [diff] [blame] | 85 | .pfn = __phys_to_pfn(IXP2000_CAP_PHYS_BASE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | .length = IXP2000_CAP_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 87 | .type = MT_DEVICE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | }, { |
| 89 | .virtual = IXP2000_INTCTL_VIRT_BASE, |
Deepak Saxena | db0d087 | 2005-10-28 15:18:58 +0100 | [diff] [blame] | 90 | .pfn = __phys_to_pfn(IXP2000_INTCTL_PHYS_BASE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | .length = IXP2000_INTCTL_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 92 | .type = MT_DEVICE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | }, { |
| 94 | .virtual = IXP2000_PCI_CREG_VIRT_BASE, |
Deepak Saxena | db0d087 | 2005-10-28 15:18:58 +0100 | [diff] [blame] | 95 | .pfn = __phys_to_pfn(IXP2000_PCI_CREG_PHYS_BASE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | .length = IXP2000_PCI_CREG_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 97 | .type = MT_DEVICE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | }, { |
| 99 | .virtual = IXP2000_PCI_CSR_VIRT_BASE, |
Deepak Saxena | db0d087 | 2005-10-28 15:18:58 +0100 | [diff] [blame] | 100 | .pfn = __phys_to_pfn(IXP2000_PCI_CSR_PHYS_BASE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | .length = IXP2000_PCI_CSR_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 102 | .type = MT_DEVICE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | }, { |
Lennert Buytenhek | baaf7ed1 | 2005-06-26 22:24:17 +0100 | [diff] [blame] | 104 | .virtual = IXP2000_MSF_VIRT_BASE, |
Deepak Saxena | db0d087 | 2005-10-28 15:18:58 +0100 | [diff] [blame] | 105 | .pfn = __phys_to_pfn(IXP2000_MSF_PHYS_BASE), |
Lennert Buytenhek | baaf7ed1 | 2005-06-26 22:24:17 +0100 | [diff] [blame] | 106 | .length = IXP2000_MSF_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 107 | .type = MT_DEVICE, |
Lennert Buytenhek | baaf7ed1 | 2005-06-26 22:24:17 +0100 | [diff] [blame] | 108 | }, { |
Lennert Buytenhek | dd29c72 | 2006-01-13 20:51:43 +0000 | [diff] [blame] | 109 | .virtual = IXP2000_SCRATCH_RING_VIRT_BASE, |
| 110 | .pfn = __phys_to_pfn(IXP2000_SCRATCH_RING_PHYS_BASE), |
| 111 | .length = IXP2000_SCRATCH_RING_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 112 | .type = MT_DEVICE, |
Lennert Buytenhek | dd29c72 | 2006-01-13 20:51:43 +0000 | [diff] [blame] | 113 | }, { |
| 114 | .virtual = IXP2000_SRAM0_VIRT_BASE, |
| 115 | .pfn = __phys_to_pfn(IXP2000_SRAM0_PHYS_BASE), |
| 116 | .length = IXP2000_SRAM0_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 117 | .type = MT_DEVICE, |
Lennert Buytenhek | dd29c72 | 2006-01-13 20:51:43 +0000 | [diff] [blame] | 118 | }, { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | .virtual = IXP2000_PCI_IO_VIRT_BASE, |
Deepak Saxena | db0d087 | 2005-10-28 15:18:58 +0100 | [diff] [blame] | 120 | .pfn = __phys_to_pfn(IXP2000_PCI_IO_PHYS_BASE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | .length = IXP2000_PCI_IO_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 122 | .type = MT_DEVICE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | }, { |
| 124 | .virtual = IXP2000_PCI_CFG0_VIRT_BASE, |
Deepak Saxena | db0d087 | 2005-10-28 15:18:58 +0100 | [diff] [blame] | 125 | .pfn = __phys_to_pfn(IXP2000_PCI_CFG0_PHYS_BASE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | .length = IXP2000_PCI_CFG0_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 127 | .type = MT_DEVICE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | }, { |
| 129 | .virtual = IXP2000_PCI_CFG1_VIRT_BASE, |
Deepak Saxena | db0d087 | 2005-10-28 15:18:58 +0100 | [diff] [blame] | 130 | .pfn = __phys_to_pfn(IXP2000_PCI_CFG1_PHYS_BASE), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | .length = IXP2000_PCI_CFG1_SIZE, |
Russell King | db5b716 | 2008-09-07 12:42:51 +0100 | [diff] [blame] | 132 | .type = MT_DEVICE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | }; |
| 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | void __init ixp2000_map_io(void) |
| 137 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | iotable_init(ixp2000_io_desc, ARRAY_SIZE(ixp2000_io_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
| 140 | /* Set slowport to 8-bit mode. */ |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 141 | ixp2000_reg_wrb(IXP2000_SLOWPORT_FRM, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
| 143 | |
Lennert Buytenhek | 28187f2 | 2005-07-10 19:44:53 +0100 | [diff] [blame] | 144 | |
| 145 | /************************************************************************* |
| 146 | * Serial port support for IXP2000 |
| 147 | *************************************************************************/ |
| 148 | static struct plat_serial8250_port ixp2000_serial_port[] = { |
| 149 | { |
| 150 | .mapbase = IXP2000_UART_PHYS_BASE, |
| 151 | .membase = (char *)(IXP2000_UART_VIRT_BASE + 3), |
| 152 | .irq = IRQ_IXP2000_UART, |
| 153 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| 154 | .iotype = UPIO_MEM, |
| 155 | .regshift = 2, |
| 156 | .uartclk = 50000000, |
| 157 | }, |
| 158 | { }, |
| 159 | }; |
| 160 | |
| 161 | static struct resource ixp2000_uart_resource = { |
| 162 | .start = IXP2000_UART_PHYS_BASE, |
Deepak Saxena | 702c96d5 | 2005-09-30 16:20:22 -0700 | [diff] [blame] | 163 | .end = IXP2000_UART_PHYS_BASE + 0x1f, |
Lennert Buytenhek | 28187f2 | 2005-07-10 19:44:53 +0100 | [diff] [blame] | 164 | .flags = IORESOURCE_MEM, |
| 165 | }; |
| 166 | |
| 167 | static struct platform_device ixp2000_serial_device = { |
| 168 | .name = "serial8250", |
Russell King | 6df29de | 2005-09-08 16:04:41 +0100 | [diff] [blame] | 169 | .id = PLAT8250_DEV_PLATFORM, |
Lennert Buytenhek | 28187f2 | 2005-07-10 19:44:53 +0100 | [diff] [blame] | 170 | .dev = { |
| 171 | .platform_data = ixp2000_serial_port, |
| 172 | }, |
| 173 | .num_resources = 1, |
| 174 | .resource = &ixp2000_uart_resource, |
| 175 | }; |
| 176 | |
| 177 | void __init ixp2000_uart_init(void) |
| 178 | { |
| 179 | platform_device_register(&ixp2000_serial_device); |
| 180 | } |
| 181 | |
| 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | /************************************************************************* |
| 184 | * Timer-tick functions for IXP2000 |
| 185 | *************************************************************************/ |
| 186 | static unsigned ticks_per_jiffy; |
| 187 | static unsigned ticks_per_usec; |
| 188 | static unsigned next_jiffy_time; |
Lennert Buytenhek | e4fe198 | 2005-06-20 18:51:07 +0100 | [diff] [blame] | 189 | static volatile unsigned long *missing_jiffy_timer_csr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
| 191 | unsigned long ixp2000_gettimeoffset (void) |
| 192 | { |
| 193 | unsigned long offset; |
| 194 | |
Lennert Buytenhek | e4fe198 | 2005-06-20 18:51:07 +0100 | [diff] [blame] | 195 | offset = next_jiffy_time - *missing_jiffy_timer_csr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
| 197 | return offset / ticks_per_usec; |
| 198 | } |
| 199 | |
Uwe Kleine-König | d463f36 | 2010-10-19 09:43:59 +0100 | [diff] [blame] | 200 | static irqreturn_t ixp2000_timer_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | /* clear timer 1 */ |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 203 | ixp2000_reg_wrb(IXP2000_T1_CLR, 1); |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 204 | |
Lennert Buytenhek | f869afa | 2006-06-22 10:30:53 +0100 | [diff] [blame] | 205 | while ((signed long)(next_jiffy_time - *missing_jiffy_timer_csr) |
| 206 | >= ticks_per_jiffy) { |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 207 | timer_tick(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | next_jiffy_time -= ticks_per_jiffy; |
| 209 | } |
| 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | return IRQ_HANDLED; |
| 212 | } |
| 213 | |
| 214 | static struct irqaction ixp2000_timer_irq = { |
| 215 | .name = "IXP2000 Timer Tick", |
Bernhard Walle | b30faba | 2007-05-08 00:35:39 -0700 | [diff] [blame] | 216 | .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, |
Russell King | 09b8b5f | 2005-06-26 17:06:36 +0100 | [diff] [blame] | 217 | .handler = ixp2000_timer_interrupt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | }; |
| 219 | |
| 220 | void __init ixp2000_init_time(unsigned long tick_rate) |
| 221 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | ticks_per_jiffy = (tick_rate + HZ/2) / HZ; |
| 223 | ticks_per_usec = tick_rate / 1000000; |
| 224 | |
Lennert Buytenhek | e4fe198 | 2005-06-20 18:51:07 +0100 | [diff] [blame] | 225 | /* |
| 226 | * We use timer 1 as our timer interrupt. |
| 227 | */ |
| 228 | ixp2000_reg_write(IXP2000_T1_CLR, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | ixp2000_reg_write(IXP2000_T1_CLD, ticks_per_jiffy - 1); |
| 230 | ixp2000_reg_write(IXP2000_T1_CTL, (1 << 7)); |
| 231 | |
| 232 | /* |
Lennert Buytenhek | e4fe198 | 2005-06-20 18:51:07 +0100 | [diff] [blame] | 233 | * We use a second timer as a monotonic counter for tracking |
| 234 | * missed jiffies. The IXP2000 has four timers, but if we're |
| 235 | * on an A-step IXP2800, timer 2 and 3 don't work, so on those |
| 236 | * chips we use timer 4. Timer 4 is the only timer that can |
| 237 | * be used for the watchdog, so we use timer 2 if we're on a |
| 238 | * non-buggy chip. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | */ |
Lennert Buytenhek | e4fe198 | 2005-06-20 18:51:07 +0100 | [diff] [blame] | 240 | if ((*IXP2000_PRODUCT_ID & 0x001ffef0) == 0x00000000) { |
| 241 | printk(KERN_INFO "Enabling IXP2800 erratum #25 workaround\n"); |
| 242 | |
| 243 | ixp2000_reg_write(IXP2000_T4_CLR, 0); |
| 244 | ixp2000_reg_write(IXP2000_T4_CLD, -1); |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 245 | ixp2000_reg_wrb(IXP2000_T4_CTL, (1 << 7)); |
Lennert Buytenhek | e4fe198 | 2005-06-20 18:51:07 +0100 | [diff] [blame] | 246 | missing_jiffy_timer_csr = IXP2000_T4_CSR; |
| 247 | } else { |
| 248 | ixp2000_reg_write(IXP2000_T2_CLR, 0); |
| 249 | ixp2000_reg_write(IXP2000_T2_CLD, -1); |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 250 | ixp2000_reg_wrb(IXP2000_T2_CTL, (1 << 7)); |
Lennert Buytenhek | e4fe198 | 2005-06-20 18:51:07 +0100 | [diff] [blame] | 251 | missing_jiffy_timer_csr = IXP2000_T2_CSR; |
| 252 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | next_jiffy_time = 0xffffffff; |
| 254 | |
| 255 | /* register for interrupt */ |
| 256 | setup_irq(IRQ_IXP2000_TIMER1, &ixp2000_timer_irq); |
| 257 | } |
| 258 | |
| 259 | /************************************************************************* |
| 260 | * GPIO helpers |
| 261 | *************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | static unsigned long GPIO_IRQ_falling_edge; |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 263 | static unsigned long GPIO_IRQ_rising_edge; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | static unsigned long GPIO_IRQ_level_low; |
| 265 | static unsigned long GPIO_IRQ_level_high; |
| 266 | |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 267 | static void update_gpio_int_csrs(void) |
| 268 | { |
| 269 | ixp2000_reg_write(IXP2000_GPIO_FEDR, GPIO_IRQ_falling_edge); |
| 270 | ixp2000_reg_write(IXP2000_GPIO_REDR, GPIO_IRQ_rising_edge); |
| 271 | ixp2000_reg_write(IXP2000_GPIO_LSLR, GPIO_IRQ_level_low); |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 272 | ixp2000_reg_wrb(IXP2000_GPIO_LSHR, GPIO_IRQ_level_high); |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | void gpio_line_config(int line, int direction) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
| 277 | unsigned long flags; |
| 278 | |
| 279 | local_irq_save(flags); |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 280 | if (direction == GPIO_OUT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | /* if it's an output, it ain't an interrupt anymore */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | GPIO_IRQ_falling_edge &= ~(1 << line); |
| 283 | GPIO_IRQ_rising_edge &= ~(1 << line); |
| 284 | GPIO_IRQ_level_low &= ~(1 << line); |
| 285 | GPIO_IRQ_level_high &= ~(1 << line); |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 286 | update_gpio_int_csrs(); |
| 287 | |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 288 | ixp2000_reg_wrb(IXP2000_GPIO_PDSR, 1 << line); |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 289 | } else if (direction == GPIO_IN) { |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 290 | ixp2000_reg_wrb(IXP2000_GPIO_PDCR, 1 << line); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | local_irq_restore(flags); |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 293 | } |
Lennert Buytenhek | fc8ea7a | 2006-06-24 09:57:14 +0100 | [diff] [blame] | 294 | EXPORT_SYMBOL(gpio_line_config); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
| 296 | |
| 297 | /************************************************************************* |
| 298 | * IRQ handling IXP2000 |
| 299 | *************************************************************************/ |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 300 | static void ixp2000_GPIO_irq_handler(unsigned int irq, struct irq_desc *desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | { |
| 302 | int i; |
| 303 | unsigned long status = *IXP2000_GPIO_INST; |
| 304 | |
| 305 | for (i = 0; i <= 7; i++) { |
| 306 | if (status & (1<<i)) { |
Dmitry Baryshkov | d8aa025 | 2008-10-09 13:36:24 +0100 | [diff] [blame] | 307 | generic_handle_irq(i + IRQ_IXP2000_GPIO0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | } |
| 310 | } |
| 311 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 312 | static int ixp2000_GPIO_irq_type(struct irq_data *d, unsigned int type) |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 313 | { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 314 | int line = d->irq - IRQ_IXP2000_GPIO0; |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 315 | |
| 316 | /* |
| 317 | * First, configure this GPIO line as an input. |
| 318 | */ |
| 319 | ixp2000_reg_write(IXP2000_GPIO_PDCR, 1 << line); |
| 320 | |
| 321 | /* |
| 322 | * Then, set the proper trigger type. |
| 323 | */ |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 324 | if (type & IRQ_TYPE_EDGE_FALLING) |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 325 | GPIO_IRQ_falling_edge |= 1 << line; |
| 326 | else |
| 327 | GPIO_IRQ_falling_edge &= ~(1 << line); |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 328 | if (type & IRQ_TYPE_EDGE_RISING) |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 329 | GPIO_IRQ_rising_edge |= 1 << line; |
| 330 | else |
| 331 | GPIO_IRQ_rising_edge &= ~(1 << line); |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 332 | if (type & IRQ_TYPE_LEVEL_LOW) |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 333 | GPIO_IRQ_level_low |= 1 << line; |
| 334 | else |
| 335 | GPIO_IRQ_level_low &= ~(1 << line); |
Dmitry Baryshkov | 6cab486 | 2008-07-27 04:23:31 +0100 | [diff] [blame] | 336 | if (type & IRQ_TYPE_LEVEL_HIGH) |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 337 | GPIO_IRQ_level_high |= 1 << line; |
| 338 | else |
| 339 | GPIO_IRQ_level_high &= ~(1 << line); |
| 340 | update_gpio_int_csrs(); |
| 341 | |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 342 | return 0; |
| 343 | } |
| 344 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 345 | static void ixp2000_GPIO_irq_mask_ack(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 347 | unsigned int irq = d->irq; |
| 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | ixp2000_reg_write(IXP2000_GPIO_INCR, (1 << (irq - IRQ_IXP2000_GPIO0))); |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 350 | |
| 351 | ixp2000_reg_write(IXP2000_GPIO_EDSR, (1 << (irq - IRQ_IXP2000_GPIO0))); |
| 352 | ixp2000_reg_write(IXP2000_GPIO_LDSR, (1 << (irq - IRQ_IXP2000_GPIO0))); |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 353 | ixp2000_reg_wrb(IXP2000_GPIO_INST, (1 << (irq - IRQ_IXP2000_GPIO0))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 356 | static void ixp2000_GPIO_irq_mask(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 358 | unsigned int irq = d->irq; |
| 359 | |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 360 | ixp2000_reg_wrb(IXP2000_GPIO_INCR, (1 << (irq - IRQ_IXP2000_GPIO0))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 363 | static void ixp2000_GPIO_irq_unmask(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 365 | unsigned int irq = d->irq; |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | ixp2000_reg_write(IXP2000_GPIO_INSR, (1 << (irq - IRQ_IXP2000_GPIO0))); |
| 368 | } |
| 369 | |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 370 | static struct irq_chip ixp2000_GPIO_irq_chip = { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 371 | .irq_ack = ixp2000_GPIO_irq_mask_ack, |
| 372 | .irq_mask = ixp2000_GPIO_irq_mask, |
| 373 | .irq_unmask = ixp2000_GPIO_irq_unmask, |
| 374 | .irq_set_type = ixp2000_GPIO_irq_type, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | }; |
| 376 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 377 | static void ixp2000_pci_irq_mask(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
| 379 | unsigned long temp = *IXP2000_PCI_XSCALE_INT_ENABLE; |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 380 | if (d->irq == IRQ_IXP2000_PCIA) |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 381 | ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, (temp & ~(1 << 26))); |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 382 | else if (d->irq == IRQ_IXP2000_PCIB) |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 383 | ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, (temp & ~(1 << 27))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
| 385 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 386 | static void ixp2000_pci_irq_unmask(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | { |
| 388 | unsigned long temp = *IXP2000_PCI_XSCALE_INT_ENABLE; |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 389 | if (d->irq == IRQ_IXP2000_PCIA) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | ixp2000_reg_write(IXP2000_PCI_XSCALE_INT_ENABLE, (temp | (1 << 26))); |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 391 | else if (d->irq == IRQ_IXP2000_PCIB) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | ixp2000_reg_write(IXP2000_PCI_XSCALE_INT_ENABLE, (temp | (1 << 27))); |
| 393 | } |
| 394 | |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 395 | /* |
| 396 | * Error interrupts. These are used extensively by the microengine drivers |
| 397 | */ |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 398 | static void ixp2000_err_irq_handler(unsigned int irq, struct irq_desc *desc) |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 399 | { |
| 400 | int i; |
| 401 | unsigned long status = *IXP2000_IRQ_ERR_STATUS; |
| 402 | |
| 403 | for(i = 31; i >= 0; i--) { |
| 404 | if(status & (1 << i)) { |
Dmitry Baryshkov | d8aa025 | 2008-10-09 13:36:24 +0100 | [diff] [blame] | 405 | generic_handle_irq(IRQ_IXP2000_DRAM0_MIN_ERR + i); |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 406 | } |
| 407 | } |
| 408 | } |
| 409 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 410 | static void ixp2000_err_irq_mask(struct irq_data *d) |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 411 | { |
| 412 | ixp2000_reg_write(IXP2000_IRQ_ERR_ENABLE_CLR, |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 413 | (1 << (d->irq - IRQ_IXP2000_DRAM0_MIN_ERR))); |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 414 | } |
| 415 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 416 | static void ixp2000_err_irq_unmask(struct irq_data *d) |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 417 | { |
| 418 | ixp2000_reg_write(IXP2000_IRQ_ERR_ENABLE_SET, |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 419 | (1 << (d->irq - IRQ_IXP2000_DRAM0_MIN_ERR))); |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 420 | } |
| 421 | |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 422 | static struct irq_chip ixp2000_err_irq_chip = { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 423 | .irq_ack = ixp2000_err_irq_mask, |
| 424 | .irq_mask = ixp2000_err_irq_mask, |
| 425 | .irq_unmask = ixp2000_err_irq_unmask |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 426 | }; |
| 427 | |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 428 | static struct irq_chip ixp2000_pci_irq_chip = { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 429 | .irq_ack = ixp2000_pci_irq_mask, |
| 430 | .irq_mask = ixp2000_pci_irq_mask, |
| 431 | .irq_unmask = ixp2000_pci_irq_unmask |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | }; |
| 433 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 434 | static void ixp2000_irq_mask(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 436 | ixp2000_reg_wrb(IXP2000_IRQ_ENABLE_CLR, (1 << d->irq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 439 | static void ixp2000_irq_unmask(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 441 | ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET, (1 << d->irq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
| 443 | |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 444 | static struct irq_chip ixp2000_irq_chip = { |
Lennert Buytenhek | 6e8f54f | 2010-11-29 10:32:55 +0100 | [diff] [blame] | 445 | .irq_ack = ixp2000_irq_mask, |
| 446 | .irq_mask = ixp2000_irq_mask, |
| 447 | .irq_unmask = ixp2000_irq_unmask |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | }; |
| 449 | |
| 450 | void __init ixp2000_init_irq(void) |
| 451 | { |
| 452 | int irq; |
| 453 | |
| 454 | /* |
| 455 | * Mask all sources |
| 456 | */ |
| 457 | ixp2000_reg_write(IXP2000_IRQ_ENABLE_CLR, 0xffffffff); |
| 458 | ixp2000_reg_write(IXP2000_FIQ_ENABLE_CLR, 0xffffffff); |
| 459 | |
| 460 | /* clear all GPIO edge/level detects */ |
| 461 | ixp2000_reg_write(IXP2000_GPIO_REDR, 0); |
| 462 | ixp2000_reg_write(IXP2000_GPIO_FEDR, 0); |
| 463 | ixp2000_reg_write(IXP2000_GPIO_LSHR, 0); |
| 464 | ixp2000_reg_write(IXP2000_GPIO_LSLR, 0); |
| 465 | ixp2000_reg_write(IXP2000_GPIO_INCR, -1); |
| 466 | |
| 467 | /* clear PCI interrupt sources */ |
Lennert Buytenhek | e9b72e4 | 2005-11-01 19:44:26 +0000 | [diff] [blame] | 468 | ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | /* |
| 471 | * Certain bits in the IRQ status register of the |
| 472 | * IXP2000 are reserved. Instead of trying to map |
| 473 | * things non 1:1 from bit position to IRQ number, |
| 474 | * we mark the reserved IRQs as invalid. This makes |
| 475 | * our mask/unmask code much simpler. |
| 476 | */ |
| 477 | for (irq = IRQ_IXP2000_SOFT_INT; irq <= IRQ_IXP2000_THDB3; irq++) { |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 478 | if ((1 << irq) & IXP2000_VALID_IRQ_MASK) { |
Thomas Gleixner | f38c02f | 2011-03-24 13:35:09 +0100 | [diff] [blame] | 479 | irq_set_chip_and_handler(irq, &ixp2000_irq_chip, |
| 480 | handle_level_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | set_irq_flags(irq, IRQF_VALID); |
| 482 | } else set_irq_flags(irq, 0); |
| 483 | } |
Lennert Buytenhek | c498288 | 2005-06-24 20:54:35 +0100 | [diff] [blame] | 484 | |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 485 | for (irq = IRQ_IXP2000_DRAM0_MIN_ERR; irq <= IRQ_IXP2000_SP_INT; irq++) { |
| 486 | if((1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)) & |
| 487 | IXP2000_VALID_ERR_IRQ_MASK) { |
Thomas Gleixner | f38c02f | 2011-03-24 13:35:09 +0100 | [diff] [blame] | 488 | irq_set_chip_and_handler(irq, &ixp2000_err_irq_chip, |
| 489 | handle_level_irq); |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 490 | set_irq_flags(irq, IRQF_VALID); |
| 491 | } |
| 492 | else |
| 493 | set_irq_flags(irq, 0); |
| 494 | } |
Thomas Gleixner | 6845664a | 2011-03-24 13:25:22 +0100 | [diff] [blame] | 495 | irq_set_chained_handler(IRQ_IXP2000_ERRSUM, ixp2000_err_irq_handler); |
Dave Jiang | 7866f64 | 2005-11-04 17:15:44 +0000 | [diff] [blame] | 496 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | for (irq = IRQ_IXP2000_GPIO0; irq <= IRQ_IXP2000_GPIO7; irq++) { |
Thomas Gleixner | f38c02f | 2011-03-24 13:35:09 +0100 | [diff] [blame] | 498 | irq_set_chip_and_handler(irq, &ixp2000_GPIO_irq_chip, |
| 499 | handle_level_irq); |
Lennert Buytenhek | bd115ea | 2006-03-22 20:14:09 +0000 | [diff] [blame] | 500 | set_irq_flags(irq, IRQF_VALID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
Thomas Gleixner | 6845664a | 2011-03-24 13:25:22 +0100 | [diff] [blame] | 502 | irq_set_chained_handler(IRQ_IXP2000_GPIO, ixp2000_GPIO_irq_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
| 504 | /* |
| 505 | * Enable PCI irqs. The actual PCI[AB] decoding is done in |
| 506 | * entry-macro.S, so we don't need a chained handler for the |
| 507 | * PCI interrupt source. |
| 508 | */ |
| 509 | ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET, (1 << IRQ_IXP2000_PCI)); |
| 510 | for (irq = IRQ_IXP2000_PCIA; irq <= IRQ_IXP2000_PCIB; irq++) { |
Thomas Gleixner | f38c02f | 2011-03-24 13:35:09 +0100 | [diff] [blame] | 511 | irq_set_chip_and_handler(irq, &ixp2000_pci_irq_chip, |
| 512 | handle_level_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | set_irq_flags(irq, IRQF_VALID); |
| 514 | } |
| 515 | } |
| 516 | |
Russell King | 1139b92 | 2011-11-05 11:46:04 +0000 | [diff] [blame] | 517 | void ixp2000_restart(char mode, const char *cmd) |
| 518 | { |
| 519 | ixp2000_reg_wrb(IXP2000_RESET0, RSTALL); |
| 520 | } |