Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/kernel.h> |
| 2 | #include <linux/init.h> |
| 3 | #include <linux/pci.h> |
| 4 | #include <linux/slab.h> |
| 5 | #include <asm/oplib.h> |
| 6 | #include <asm/isa.h> |
| 7 | |
| 8 | struct sparc_isa_bridge *isa_chain; |
| 9 | |
| 10 | static void __init fatal_err(const char *reason) |
| 11 | { |
| 12 | prom_printf("ISA: fatal error, %s.\n", reason); |
| 13 | } |
| 14 | |
| 15 | static void __init report_dev(struct sparc_isa_device *isa_dev, int child) |
| 16 | { |
| 17 | if (child) |
| 18 | printk(" (%s)", isa_dev->prom_name); |
| 19 | else |
| 20 | printk(" [%s", isa_dev->prom_name); |
| 21 | } |
| 22 | |
| 23 | static void __init isa_dev_get_resource(struct sparc_isa_device *isa_dev, |
| 24 | struct linux_prom_registers *pregs, |
| 25 | int pregs_size) |
| 26 | { |
| 27 | unsigned long base, len; |
| 28 | int prop_len; |
| 29 | |
| 30 | prop_len = prom_getproperty(isa_dev->prom_node, "reg", |
| 31 | (char *) pregs, pregs_size); |
| 32 | |
| 33 | if (prop_len <= 0) |
| 34 | return; |
| 35 | |
| 36 | /* Only the first one is interesting. */ |
| 37 | len = pregs[0].reg_size; |
| 38 | base = (((unsigned long)pregs[0].which_io << 32) | |
| 39 | (unsigned long)pregs[0].phys_addr); |
| 40 | base += isa_dev->bus->parent->io_space.start; |
| 41 | |
| 42 | isa_dev->resource.start = base; |
| 43 | isa_dev->resource.end = (base + len - 1UL); |
| 44 | isa_dev->resource.flags = IORESOURCE_IO; |
| 45 | isa_dev->resource.name = isa_dev->prom_name; |
| 46 | |
| 47 | request_resource(&isa_dev->bus->parent->io_space, |
| 48 | &isa_dev->resource); |
| 49 | } |
| 50 | |
| 51 | /* I can't believe they didn't put a real INO in the isa device |
| 52 | * interrupts property. The whole point of the OBP properties |
| 53 | * is to shield the kernel from IRQ routing details. |
| 54 | * |
| 55 | * The P1275 standard for ISA devices seems to also have been |
| 56 | * totally ignored. |
| 57 | * |
| 58 | * On later systems, an interrupt-map and interrupt-map-mask scheme |
| 59 | * akin to EBUS is used. |
| 60 | */ |
| 61 | static struct { |
| 62 | int obp_irq; |
| 63 | int pci_ino; |
| 64 | } grover_irq_table[] = { |
| 65 | { 1, 0x00 }, /* dma, unknown ino at this point */ |
| 66 | { 2, 0x27 }, /* floppy */ |
| 67 | { 3, 0x22 }, /* parallel */ |
| 68 | { 4, 0x2b }, /* serial */ |
| 69 | { 5, 0x25 }, /* acpi power management */ |
| 70 | |
| 71 | { 0, 0x00 } /* end of table */ |
| 72 | }; |
| 73 | |
| 74 | static int __init isa_dev_get_irq_using_imap(struct sparc_isa_device *isa_dev, |
| 75 | struct sparc_isa_bridge *isa_br, |
| 76 | int *interrupt, |
| 77 | struct linux_prom_registers *pregs) |
| 78 | { |
| 79 | unsigned int hi, lo, irq; |
| 80 | int i; |
| 81 | |
| 82 | hi = pregs->which_io & isa_br->isa_intmask.phys_hi; |
| 83 | lo = pregs->phys_addr & isa_br->isa_intmask.phys_lo; |
| 84 | irq = *interrupt & isa_br->isa_intmask.interrupt; |
| 85 | for (i = 0; i < isa_br->num_isa_intmap; i++) { |
| 86 | if ((isa_br->isa_intmap[i].phys_hi == hi) && |
| 87 | (isa_br->isa_intmap[i].phys_lo == lo) && |
| 88 | (isa_br->isa_intmap[i].interrupt == irq)) { |
| 89 | *interrupt = isa_br->isa_intmap[i].cinterrupt; |
| 90 | return 0; |
| 91 | } |
| 92 | } |
| 93 | return -1; |
| 94 | } |
| 95 | |
| 96 | static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev, |
| 97 | struct linux_prom_registers *pregs) |
| 98 | { |
| 99 | int irq_prop; |
| 100 | |
| 101 | irq_prop = prom_getintdefault(isa_dev->prom_node, |
| 102 | "interrupts", -1); |
| 103 | if (irq_prop <= 0) { |
| 104 | goto no_irq; |
| 105 | } else { |
| 106 | struct pci_controller_info *pcic; |
| 107 | struct pci_pbm_info *pbm; |
| 108 | int i; |
| 109 | |
| 110 | if (isa_dev->bus->num_isa_intmap) { |
| 111 | if (!isa_dev_get_irq_using_imap(isa_dev, |
| 112 | isa_dev->bus, |
| 113 | &irq_prop, |
| 114 | pregs)) |
| 115 | goto route_irq; |
| 116 | } |
| 117 | |
| 118 | for (i = 0; grover_irq_table[i].obp_irq != 0; i++) { |
| 119 | if (grover_irq_table[i].obp_irq == irq_prop) { |
| 120 | int ino = grover_irq_table[i].pci_ino; |
| 121 | |
| 122 | if (ino == 0) |
| 123 | goto no_irq; |
| 124 | |
| 125 | irq_prop = ino; |
| 126 | goto route_irq; |
| 127 | } |
| 128 | } |
| 129 | goto no_irq; |
| 130 | |
| 131 | route_irq: |
| 132 | pbm = isa_dev->bus->parent; |
| 133 | pcic = pbm->parent; |
| 134 | isa_dev->irq = pcic->irq_build(pbm, NULL, irq_prop); |
| 135 | return; |
| 136 | } |
| 137 | |
| 138 | no_irq: |
| 139 | isa_dev->irq = PCI_IRQ_NONE; |
| 140 | } |
| 141 | |
| 142 | static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev) |
| 143 | { |
| 144 | int node = prom_getchild(parent_isa_dev->prom_node); |
| 145 | |
| 146 | if (node == 0) |
| 147 | return; |
| 148 | |
| 149 | printk(" ->"); |
| 150 | while (node != 0) { |
| 151 | struct linux_prom_registers regs[PROMREG_MAX]; |
| 152 | struct sparc_isa_device *isa_dev; |
| 153 | int prop_len; |
| 154 | |
| 155 | isa_dev = kmalloc(sizeof(*isa_dev), GFP_KERNEL); |
| 156 | if (!isa_dev) { |
| 157 | fatal_err("cannot allocate child isa_dev"); |
| 158 | prom_halt(); |
| 159 | } |
| 160 | |
| 161 | memset(isa_dev, 0, sizeof(*isa_dev)); |
| 162 | |
| 163 | /* Link it in to parent. */ |
| 164 | isa_dev->next = parent_isa_dev->child; |
| 165 | parent_isa_dev->child = isa_dev; |
| 166 | |
| 167 | isa_dev->bus = parent_isa_dev->bus; |
| 168 | isa_dev->prom_node = node; |
| 169 | prop_len = prom_getproperty(node, "name", |
| 170 | (char *) isa_dev->prom_name, |
| 171 | sizeof(isa_dev->prom_name)); |
| 172 | if (prop_len <= 0) { |
| 173 | fatal_err("cannot get child isa_dev OBP node name"); |
| 174 | prom_halt(); |
| 175 | } |
| 176 | |
| 177 | prop_len = prom_getproperty(node, "compatible", |
| 178 | (char *) isa_dev->compatible, |
| 179 | sizeof(isa_dev->compatible)); |
| 180 | |
| 181 | /* Not having this is OK. */ |
| 182 | if (prop_len <= 0) |
| 183 | isa_dev->compatible[0] = '\0'; |
| 184 | |
| 185 | isa_dev_get_resource(isa_dev, regs, sizeof(regs)); |
| 186 | isa_dev_get_irq(isa_dev, regs); |
| 187 | |
| 188 | report_dev(isa_dev, 1); |
| 189 | |
| 190 | node = prom_getsibling(node); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br) |
| 195 | { |
| 196 | int node = prom_getchild(isa_br->prom_node); |
| 197 | |
| 198 | while (node != 0) { |
| 199 | struct linux_prom_registers regs[PROMREG_MAX]; |
| 200 | struct sparc_isa_device *isa_dev; |
| 201 | int prop_len; |
| 202 | |
| 203 | isa_dev = kmalloc(sizeof(*isa_dev), GFP_KERNEL); |
| 204 | if (!isa_dev) { |
| 205 | fatal_err("cannot allocate isa_dev"); |
| 206 | prom_halt(); |
| 207 | } |
| 208 | |
| 209 | memset(isa_dev, 0, sizeof(*isa_dev)); |
| 210 | |
| 211 | /* Link it in. */ |
| 212 | isa_dev->next = NULL; |
| 213 | if (isa_br->devices == NULL) { |
| 214 | isa_br->devices = isa_dev; |
| 215 | } else { |
| 216 | struct sparc_isa_device *tmp = isa_br->devices; |
| 217 | |
| 218 | while (tmp->next) |
| 219 | tmp = tmp->next; |
| 220 | |
| 221 | tmp->next = isa_dev; |
| 222 | } |
| 223 | |
| 224 | isa_dev->bus = isa_br; |
| 225 | isa_dev->prom_node = node; |
| 226 | prop_len = prom_getproperty(node, "name", |
| 227 | (char *) isa_dev->prom_name, |
| 228 | sizeof(isa_dev->prom_name)); |
| 229 | if (prop_len <= 0) { |
| 230 | fatal_err("cannot get isa_dev OBP node name"); |
| 231 | prom_halt(); |
| 232 | } |
| 233 | |
| 234 | prop_len = prom_getproperty(node, "compatible", |
| 235 | (char *) isa_dev->compatible, |
| 236 | sizeof(isa_dev->compatible)); |
| 237 | |
| 238 | /* Not having this is OK. */ |
| 239 | if (prop_len <= 0) |
| 240 | isa_dev->compatible[0] = '\0'; |
| 241 | |
| 242 | isa_dev_get_resource(isa_dev, regs, sizeof(regs)); |
| 243 | isa_dev_get_irq(isa_dev, regs); |
| 244 | |
| 245 | report_dev(isa_dev, 0); |
| 246 | |
| 247 | isa_fill_children(isa_dev); |
| 248 | |
| 249 | printk("]"); |
| 250 | |
| 251 | node = prom_getsibling(node); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | void __init isa_init(void) |
| 256 | { |
| 257 | struct pci_dev *pdev; |
| 258 | unsigned short vendor, device; |
| 259 | int index = 0; |
| 260 | |
| 261 | vendor = PCI_VENDOR_ID_AL; |
| 262 | device = PCI_DEVICE_ID_AL_M1533; |
| 263 | |
| 264 | pdev = NULL; |
| 265 | while ((pdev = pci_get_device(vendor, device, pdev)) != NULL) { |
| 266 | struct pcidev_cookie *pdev_cookie; |
| 267 | struct pci_pbm_info *pbm; |
| 268 | struct sparc_isa_bridge *isa_br; |
| 269 | int prop_len; |
| 270 | |
| 271 | pdev_cookie = pdev->sysdata; |
| 272 | if (!pdev_cookie) { |
| 273 | printk("ISA: Warning, ISA bridge ignored due to " |
| 274 | "lack of OBP data.\n"); |
| 275 | continue; |
| 276 | } |
| 277 | pbm = pdev_cookie->pbm; |
| 278 | |
| 279 | isa_br = kmalloc(sizeof(*isa_br), GFP_KERNEL); |
| 280 | if (!isa_br) { |
| 281 | fatal_err("cannot allocate sparc_isa_bridge"); |
| 282 | prom_halt(); |
| 283 | } |
| 284 | |
| 285 | memset(isa_br, 0, sizeof(*isa_br)); |
| 286 | |
| 287 | /* Link it in. */ |
| 288 | isa_br->next = isa_chain; |
| 289 | isa_chain = isa_br; |
| 290 | |
| 291 | isa_br->parent = pbm; |
| 292 | isa_br->self = pdev; |
| 293 | isa_br->index = index++; |
| 294 | isa_br->prom_node = pdev_cookie->prom_node; |
| 295 | strncpy(isa_br->prom_name, pdev_cookie->prom_name, |
| 296 | sizeof(isa_br->prom_name)); |
| 297 | |
| 298 | prop_len = prom_getproperty(isa_br->prom_node, |
| 299 | "ranges", |
| 300 | (char *) isa_br->isa_ranges, |
| 301 | sizeof(isa_br->isa_ranges)); |
| 302 | if (prop_len <= 0) |
| 303 | isa_br->num_isa_ranges = 0; |
| 304 | else |
| 305 | isa_br->num_isa_ranges = |
| 306 | (prop_len / sizeof(struct linux_prom_isa_ranges)); |
| 307 | |
| 308 | prop_len = prom_getproperty(isa_br->prom_node, |
| 309 | "interrupt-map", |
| 310 | (char *) isa_br->isa_intmap, |
| 311 | sizeof(isa_br->isa_intmap)); |
| 312 | if (prop_len <= 0) |
| 313 | isa_br->num_isa_intmap = 0; |
| 314 | else |
| 315 | isa_br->num_isa_intmap = |
| 316 | (prop_len / sizeof(struct linux_prom_isa_intmap)); |
| 317 | |
| 318 | prop_len = prom_getproperty(isa_br->prom_node, |
| 319 | "interrupt-map-mask", |
| 320 | (char *) &(isa_br->isa_intmask), |
| 321 | sizeof(isa_br->isa_intmask)); |
| 322 | |
| 323 | printk("isa%d:", isa_br->index); |
| 324 | |
| 325 | isa_fill_devices(isa_br); |
| 326 | |
| 327 | printk("\n"); |
| 328 | } |
| 329 | } |