Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * eisa.c - provide support for EISA adapters in PA-RISC machines |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Copyright (c) 2001 Matthew Wilcox for Hewlett Packard |
| 10 | * Copyright (c) 2001 Daniel Engstrom <5116@telia.com> |
| 11 | * |
| 12 | * There are two distinct EISA adapters. Mongoose is found in machines |
| 13 | * before the 712; then the Wax ASIC is used. To complicate matters, the |
| 14 | * Wax ASIC also includes a PS/2 and RS-232 controller, but those are |
| 15 | * dealt with elsewhere; this file is concerned only with the EISA portions |
| 16 | * of Wax. |
| 17 | * |
| 18 | * |
| 19 | * HINT: |
| 20 | * ----- |
| 21 | * To allow an ISA card to work properly in the EISA slot you need to |
| 22 | * set an edge trigger level. This may be done on the palo command line |
| 23 | * by adding the kernel parameter "eisa_irq_edge=n,n2,[...]]", with |
| 24 | * n and n2 as the irq levels you want to use. |
| 25 | * |
| 26 | * Example: "eisa_irq_edge=10,11" allows ISA cards to operate at |
| 27 | * irq levels 10 and 11. |
| 28 | */ |
| 29 | |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/ioport.h> |
| 32 | #include <linux/interrupt.h> |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/pci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/spinlock.h> |
| 37 | #include <linux/eisa.h> |
| 38 | |
| 39 | #include <asm/byteorder.h> |
| 40 | #include <asm/io.h> |
| 41 | #include <asm/hardware.h> |
| 42 | #include <asm/processor.h> |
| 43 | #include <asm/parisc-device.h> |
| 44 | #include <asm/delay.h> |
| 45 | #include <asm/eisa_bus.h> |
| 46 | #include <asm/eisa_eeprom.h> |
| 47 | |
| 48 | #if 0 |
| 49 | #define EISA_DBG(msg, arg... ) printk(KERN_DEBUG "eisa: " msg , ## arg ) |
| 50 | #else |
| 51 | #define EISA_DBG(msg, arg... ) |
| 52 | #endif |
| 53 | |
| 54 | #define SNAKES_EEPROM_BASE_ADDR 0xF0810400 |
| 55 | #define MIRAGE_EEPROM_BASE_ADDR 0xF00C0400 |
| 56 | |
| 57 | static DEFINE_SPINLOCK(eisa_irq_lock); |
| 58 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 59 | void __iomem *eisa_eeprom_addr __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | /* We can only have one EISA adapter in the system because neither |
| 62 | * implementation can be flexed. |
| 63 | */ |
| 64 | static struct eisa_ba { |
| 65 | struct pci_hba_data hba; |
| 66 | unsigned long eeprom_addr; |
| 67 | struct eisa_root_device root; |
| 68 | } eisa_dev; |
| 69 | |
| 70 | /* Port ops */ |
| 71 | |
| 72 | static inline unsigned long eisa_permute(unsigned short port) |
| 73 | { |
| 74 | if (port & 0x300) { |
| 75 | return 0xfc000000 | ((port & 0xfc00) >> 6) |
| 76 | | ((port & 0x3f8) << 9) | (port & 7); |
| 77 | } else { |
| 78 | return 0xfc000000 | port; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | unsigned char eisa_in8(unsigned short port) |
| 83 | { |
| 84 | if (EISA_bus) |
| 85 | return gsc_readb(eisa_permute(port)); |
| 86 | return 0xff; |
| 87 | } |
| 88 | |
| 89 | unsigned short eisa_in16(unsigned short port) |
| 90 | { |
| 91 | if (EISA_bus) |
| 92 | return le16_to_cpu(gsc_readw(eisa_permute(port))); |
| 93 | return 0xffff; |
| 94 | } |
| 95 | |
| 96 | unsigned int eisa_in32(unsigned short port) |
| 97 | { |
| 98 | if (EISA_bus) |
| 99 | return le32_to_cpu(gsc_readl(eisa_permute(port))); |
| 100 | return 0xffffffff; |
| 101 | } |
| 102 | |
| 103 | void eisa_out8(unsigned char data, unsigned short port) |
| 104 | { |
| 105 | if (EISA_bus) |
| 106 | gsc_writeb(data, eisa_permute(port)); |
| 107 | } |
| 108 | |
| 109 | void eisa_out16(unsigned short data, unsigned short port) |
| 110 | { |
| 111 | if (EISA_bus) |
| 112 | gsc_writew(cpu_to_le16(data), eisa_permute(port)); |
| 113 | } |
| 114 | |
| 115 | void eisa_out32(unsigned int data, unsigned short port) |
| 116 | { |
| 117 | if (EISA_bus) |
| 118 | gsc_writel(cpu_to_le32(data), eisa_permute(port)); |
| 119 | } |
| 120 | |
| 121 | #ifndef CONFIG_PCI |
| 122 | /* We call these directly without PCI. See asm/io.h. */ |
| 123 | EXPORT_SYMBOL(eisa_in8); |
| 124 | EXPORT_SYMBOL(eisa_in16); |
| 125 | EXPORT_SYMBOL(eisa_in32); |
| 126 | EXPORT_SYMBOL(eisa_out8); |
| 127 | EXPORT_SYMBOL(eisa_out16); |
| 128 | EXPORT_SYMBOL(eisa_out32); |
| 129 | #endif |
| 130 | |
| 131 | /* Interrupt handling */ |
| 132 | |
| 133 | /* cached interrupt mask registers */ |
| 134 | static int master_mask; |
| 135 | static int slave_mask; |
| 136 | |
| 137 | /* the trig level can be set with the |
| 138 | * eisa_irq_edge=n,n,n commandline parameter |
| 139 | * We should really read this from the EEPROM |
| 140 | * in the furure. |
| 141 | */ |
| 142 | /* irq 13,8,2,1,0 must be edge */ |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 143 | static unsigned int eisa_irq_level __read_mostly; /* default to edge triggered */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | |
| 146 | /* called by free irq */ |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 147 | static void eisa_mask_irq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 149 | unsigned int irq = d->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | unsigned long flags; |
| 151 | |
| 152 | EISA_DBG("disable irq %d\n", irq); |
| 153 | /* just mask for now */ |
| 154 | spin_lock_irqsave(&eisa_irq_lock, flags); |
| 155 | if (irq & 8) { |
| 156 | slave_mask |= (1 << (irq&7)); |
| 157 | eisa_out8(slave_mask, 0xa1); |
| 158 | } else { |
| 159 | master_mask |= (1 << (irq&7)); |
| 160 | eisa_out8(master_mask, 0x21); |
| 161 | } |
| 162 | spin_unlock_irqrestore(&eisa_irq_lock, flags); |
| 163 | EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21)); |
| 164 | EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1)); |
| 165 | } |
| 166 | |
| 167 | /* called by request irq */ |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 168 | static void eisa_unmask_irq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | { |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 170 | unsigned int irq = d->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | unsigned long flags; |
| 172 | EISA_DBG("enable irq %d\n", irq); |
| 173 | |
| 174 | spin_lock_irqsave(&eisa_irq_lock, flags); |
| 175 | if (irq & 8) { |
| 176 | slave_mask &= ~(1 << (irq&7)); |
| 177 | eisa_out8(slave_mask, 0xa1); |
| 178 | } else { |
| 179 | master_mask &= ~(1 << (irq&7)); |
| 180 | eisa_out8(master_mask, 0x21); |
| 181 | } |
| 182 | spin_unlock_irqrestore(&eisa_irq_lock, flags); |
| 183 | EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21)); |
| 184 | EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1)); |
| 185 | } |
| 186 | |
Thomas Gleixner | dfe0756 | 2009-06-10 19:56:04 +0000 | [diff] [blame] | 187 | static struct irq_chip eisa_interrupt_type = { |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 188 | .name = "EISA", |
| 189 | .irq_unmask = eisa_unmask_irq, |
| 190 | .irq_mask = eisa_mask_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | }; |
| 192 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 193 | static irqreturn_t eisa_irq(int wax_irq, void *intr_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | { |
| 195 | int irq = gsc_readb(0xfc01f000); /* EISA supports 16 irqs */ |
| 196 | unsigned long flags; |
| 197 | |
| 198 | spin_lock_irqsave(&eisa_irq_lock, flags); |
| 199 | /* read IRR command */ |
| 200 | eisa_out8(0x0a, 0x20); |
| 201 | eisa_out8(0x0a, 0xa0); |
| 202 | |
| 203 | EISA_DBG("irq IAR %02x 8259-1 irr %02x 8259-2 irr %02x\n", |
| 204 | irq, eisa_in8(0x20), eisa_in8(0xa0)); |
| 205 | |
| 206 | /* read ISR command */ |
| 207 | eisa_out8(0x0a, 0x20); |
| 208 | eisa_out8(0x0a, 0xa0); |
| 209 | EISA_DBG("irq 8259-1 isr %02x imr %02x 8259-2 isr %02x imr %02x\n", |
| 210 | eisa_in8(0x20), eisa_in8(0x21), eisa_in8(0xa0), eisa_in8(0xa1)); |
| 211 | |
| 212 | irq &= 0xf; |
| 213 | |
| 214 | /* mask irq and write eoi */ |
| 215 | if (irq & 8) { |
| 216 | slave_mask |= (1 << (irq&7)); |
| 217 | eisa_out8(slave_mask, 0xa1); |
| 218 | eisa_out8(0x60 | (irq&7),0xa0);/* 'Specific EOI' to slave */ |
| 219 | eisa_out8(0x62,0x20); /* 'Specific EOI' to master-IRQ2 */ |
| 220 | |
| 221 | } else { |
| 222 | master_mask |= (1 << (irq&7)); |
| 223 | eisa_out8(master_mask, 0x21); |
| 224 | eisa_out8(0x60|irq,0x20); /* 'Specific EOI' to master */ |
| 225 | } |
| 226 | spin_unlock_irqrestore(&eisa_irq_lock, flags); |
| 227 | |
Kyle McMartin | ba20085 | 2010-10-13 21:00:55 -0400 | [diff] [blame] | 228 | generic_handle_irq(irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
| 230 | spin_lock_irqsave(&eisa_irq_lock, flags); |
| 231 | /* unmask */ |
| 232 | if (irq & 8) { |
| 233 | slave_mask &= ~(1 << (irq&7)); |
| 234 | eisa_out8(slave_mask, 0xa1); |
| 235 | } else { |
| 236 | master_mask &= ~(1 << (irq&7)); |
| 237 | eisa_out8(master_mask, 0x21); |
| 238 | } |
| 239 | spin_unlock_irqrestore(&eisa_irq_lock, flags); |
| 240 | return IRQ_HANDLED; |
| 241 | } |
| 242 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 243 | static irqreturn_t dummy_irq2_handler(int _, void *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
| 245 | printk(KERN_ALERT "eisa: uhh, irq2?\n"); |
| 246 | return IRQ_HANDLED; |
| 247 | } |
| 248 | |
| 249 | static struct irqaction irq2_action = { |
| 250 | .handler = dummy_irq2_handler, |
| 251 | .name = "cascade", |
| 252 | }; |
| 253 | |
| 254 | static void init_eisa_pic(void) |
| 255 | { |
| 256 | unsigned long flags; |
| 257 | |
| 258 | spin_lock_irqsave(&eisa_irq_lock, flags); |
| 259 | |
| 260 | eisa_out8(0xff, 0x21); /* mask during init */ |
| 261 | eisa_out8(0xff, 0xa1); /* mask during init */ |
| 262 | |
| 263 | /* master pic */ |
| 264 | eisa_out8(0x11,0x20); /* ICW1 */ |
| 265 | eisa_out8(0x00,0x21); /* ICW2 */ |
| 266 | eisa_out8(0x04,0x21); /* ICW3 */ |
| 267 | eisa_out8(0x01,0x21); /* ICW4 */ |
| 268 | eisa_out8(0x40,0x20); /* OCW2 */ |
| 269 | |
| 270 | /* slave pic */ |
| 271 | eisa_out8(0x11,0xa0); /* ICW1 */ |
| 272 | eisa_out8(0x08,0xa1); /* ICW2 */ |
| 273 | eisa_out8(0x02,0xa1); /* ICW3 */ |
| 274 | eisa_out8(0x01,0xa1); /* ICW4 */ |
| 275 | eisa_out8(0x40,0xa0); /* OCW2 */ |
| 276 | |
| 277 | udelay(100); |
| 278 | |
| 279 | slave_mask = 0xff; |
| 280 | master_mask = 0xfb; |
| 281 | eisa_out8(slave_mask, 0xa1); /* OCW1 */ |
| 282 | eisa_out8(master_mask, 0x21); /* OCW1 */ |
| 283 | |
| 284 | /* setup trig level */ |
| 285 | EISA_DBG("EISA edge/level %04x\n", eisa_irq_level); |
| 286 | |
| 287 | eisa_out8(eisa_irq_level&0xff, 0x4d0); /* Set all irq's to edge */ |
| 288 | eisa_out8((eisa_irq_level >> 8) & 0xff, 0x4d1); |
| 289 | |
| 290 | EISA_DBG("pic0 mask %02x\n", eisa_in8(0x21)); |
| 291 | EISA_DBG("pic1 mask %02x\n", eisa_in8(0xa1)); |
| 292 | EISA_DBG("pic0 edge/level %02x\n", eisa_in8(0x4d0)); |
| 293 | EISA_DBG("pic1 edge/level %02x\n", eisa_in8(0x4d1)); |
| 294 | |
| 295 | spin_unlock_irqrestore(&eisa_irq_lock, flags); |
| 296 | } |
| 297 | |
| 298 | /* Device initialisation */ |
| 299 | |
| 300 | #define is_mongoose(dev) (dev->id.sversion == 0x00076) |
| 301 | |
Helge Deller | 6fe077f | 2007-05-27 19:57:11 +0200 | [diff] [blame] | 302 | static int __init eisa_probe(struct parisc_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
| 304 | int i, result; |
| 305 | |
| 306 | char *name = is_mongoose(dev) ? "Mongoose" : "Wax"; |
| 307 | |
| 308 | printk(KERN_INFO "%s EISA Adapter found at 0x%08lx\n", |
Alexander Beregalov | c18b460 | 2009-03-19 10:54:07 +0000 | [diff] [blame] | 309 | name, (unsigned long)dev->hpa.start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
| 311 | eisa_dev.hba.dev = dev; |
| 312 | eisa_dev.hba.iommu = ccio_get_iommu(dev); |
| 313 | |
| 314 | eisa_dev.hba.lmmio_space.name = "EISA"; |
| 315 | eisa_dev.hba.lmmio_space.start = F_EXTEND(0xfc000000); |
| 316 | eisa_dev.hba.lmmio_space.end = F_EXTEND(0xffbfffff); |
| 317 | eisa_dev.hba.lmmio_space.flags = IORESOURCE_MEM; |
| 318 | result = ccio_request_resource(dev, &eisa_dev.hba.lmmio_space); |
| 319 | if (result < 0) { |
| 320 | printk(KERN_ERR "EISA: failed to claim EISA Bus address space!\n"); |
| 321 | return result; |
| 322 | } |
| 323 | eisa_dev.hba.io_space.name = "EISA"; |
| 324 | eisa_dev.hba.io_space.start = 0; |
| 325 | eisa_dev.hba.io_space.end = 0xffff; |
| 326 | eisa_dev.hba.lmmio_space.flags = IORESOURCE_IO; |
| 327 | result = request_resource(&ioport_resource, &eisa_dev.hba.io_space); |
| 328 | if (result < 0) { |
| 329 | printk(KERN_ERR "EISA: failed to claim EISA Bus port space!\n"); |
| 330 | return result; |
| 331 | } |
| 332 | pcibios_register_hba(&eisa_dev.hba); |
| 333 | |
Thomas Gleixner | 8c56e72 | 2006-07-01 19:29:40 -0700 | [diff] [blame] | 334 | result = request_irq(dev->irq, eisa_irq, IRQF_SHARED, "EISA", &eisa_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | if (result) { |
| 336 | printk(KERN_ERR "EISA: request_irq failed!\n"); |
| 337 | return result; |
| 338 | } |
| 339 | |
| 340 | /* Reserve IRQ2 */ |
Kyle McMartin | ba20085 | 2010-10-13 21:00:55 -0400 | [diff] [blame] | 341 | setup_irq(2, &irq2_action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | for (i = 0; i < 16; i++) { |
Kyle McMartin | ba20085 | 2010-10-13 21:00:55 -0400 | [diff] [blame] | 343 | set_irq_chip_and_handler(i, &eisa_interrupt_type, |
James Bottomley | 5189061 | 2010-12-03 02:01:05 +0000 | [diff] [blame] | 344 | handle_simple_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | EISA_bus = 1; |
| 348 | |
| 349 | if (dev->num_addrs) { |
| 350 | /* newer firmware hand out the eeprom address */ |
| 351 | eisa_dev.eeprom_addr = dev->addr[0]; |
| 352 | } else { |
| 353 | /* old firmware, need to figure out the box */ |
| 354 | if (is_mongoose(dev)) { |
| 355 | eisa_dev.eeprom_addr = SNAKES_EEPROM_BASE_ADDR; |
| 356 | } else { |
| 357 | eisa_dev.eeprom_addr = MIRAGE_EEPROM_BASE_ADDR; |
| 358 | } |
| 359 | } |
Helge Deller | 5076c15 | 2006-03-27 12:52:15 -0700 | [diff] [blame] | 360 | eisa_eeprom_addr = ioremap_nocache(eisa_dev.eeprom_addr, HPEE_MAX_LENGTH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | result = eisa_enumerator(eisa_dev.eeprom_addr, &eisa_dev.hba.io_space, |
| 362 | &eisa_dev.hba.lmmio_space); |
| 363 | init_eisa_pic(); |
| 364 | |
| 365 | if (result >= 0) { |
| 366 | /* FIXME : Don't enumerate the bus twice. */ |
| 367 | eisa_dev.root.dev = &dev->dev; |
Greg Kroah-Hartman | d18dbfa | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 368 | dev_set_drvdata(&dev->dev, &eisa_dev.root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | eisa_dev.root.bus_base_addr = 0; |
| 370 | eisa_dev.root.res = &eisa_dev.hba.io_space; |
| 371 | eisa_dev.root.slots = result; |
| 372 | eisa_dev.root.dma_mask = 0xffffffff; /* wild guess */ |
| 373 | if (eisa_root_register (&eisa_dev.root)) { |
| 374 | printk(KERN_ERR "EISA: Failed to register EISA root\n"); |
| 375 | return -1; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
Helge Deller | 6fe077f | 2007-05-27 19:57:11 +0200 | [diff] [blame] | 382 | static const struct parisc_device_id eisa_tbl[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00076 }, /* Mongoose */ |
| 384 | { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00090 }, /* Wax EISA */ |
| 385 | { 0, } |
| 386 | }; |
| 387 | |
| 388 | MODULE_DEVICE_TABLE(parisc, eisa_tbl); |
| 389 | |
| 390 | static struct parisc_driver eisa_driver = { |
Matthew Wilcox | bdad1f8 | 2005-10-21 22:36:23 -0400 | [diff] [blame] | 391 | .name = "eisa_ba", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | .id_table = eisa_tbl, |
| 393 | .probe = eisa_probe, |
| 394 | }; |
| 395 | |
| 396 | void __init eisa_init(void) |
| 397 | { |
| 398 | register_parisc_driver(&eisa_driver); |
| 399 | } |
| 400 | |
| 401 | |
| 402 | static unsigned int eisa_irq_configured; |
| 403 | void eisa_make_irq_level(int num) |
| 404 | { |
| 405 | if (eisa_irq_configured& (1<<num)) { |
| 406 | printk(KERN_WARNING |
| 407 | "IRQ %d polarity configured twice (last to level)\n", |
| 408 | num); |
| 409 | } |
| 410 | eisa_irq_level |= (1<<num); /* set the corresponding bit */ |
| 411 | eisa_irq_configured |= (1<<num); /* set the corresponding bit */ |
| 412 | } |
| 413 | |
| 414 | void eisa_make_irq_edge(int num) |
| 415 | { |
| 416 | if (eisa_irq_configured& (1<<num)) { |
| 417 | printk(KERN_WARNING |
| 418 | "IRQ %d polarity configured twice (last to edge)\n", |
| 419 | num); |
| 420 | } |
| 421 | eisa_irq_level &= ~(1<<num); /* clear the corresponding bit */ |
| 422 | eisa_irq_configured |= (1<<num); /* set the corresponding bit */ |
| 423 | } |
| 424 | |
| 425 | static int __init eisa_irq_setup(char *str) |
| 426 | { |
| 427 | char *cur = str; |
| 428 | int val; |
| 429 | |
| 430 | EISA_DBG("IRQ setup\n"); |
| 431 | while (cur != NULL) { |
| 432 | char *pe; |
| 433 | |
| 434 | val = (int) simple_strtoul(cur, &pe, 0); |
| 435 | if (val > 15 || val < 0) { |
| 436 | printk(KERN_ERR "eisa: EISA irq value are 0-15\n"); |
| 437 | continue; |
| 438 | } |
| 439 | if (val == 2) { |
| 440 | val = 9; |
| 441 | } |
| 442 | eisa_make_irq_edge(val); /* clear the corresponding bit */ |
| 443 | EISA_DBG("setting IRQ %d to edge-triggered mode\n", val); |
| 444 | |
| 445 | if ((cur = strchr(cur, ','))) { |
| 446 | cur++; |
| 447 | } else { |
| 448 | break; |
| 449 | } |
| 450 | } |
| 451 | return 1; |
| 452 | } |
| 453 | |
| 454 | __setup("eisa_irq_edge=", eisa_irq_setup); |
| 455 | |