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