Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 1 | /* |
| 2 | * PCI / PCI-X / PCI-Express support for 4xx parts |
| 3 | * |
| 4 | * Copyright 2007 Ben. Herrenschmidt <benh@kernel.crashing.org>, IBM Corp. |
| 5 | * |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 6 | * Most PCI Express code is coming from Stefan Roese implementation for |
| 7 | * arch/ppc in the Denx tree, slightly reworked by me. |
| 8 | * |
| 9 | * Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de> |
| 10 | * |
| 11 | * Some of that comes itself from a previous implementation for 440SPE only |
| 12 | * by Roland Dreier: |
| 13 | * |
| 14 | * Copyright (c) 2005 Cisco Systems. All rights reserved. |
| 15 | * Roland Dreier <rolandd@cisco.com> |
| 16 | * |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 17 | */ |
| 18 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 19 | #undef DEBUG |
| 20 | |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 21 | #include <linux/kernel.h> |
| 22 | #include <linux/pci.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/of.h> |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 25 | #include <linux/bootmem.h> |
| 26 | #include <linux/delay.h> |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 27 | |
| 28 | #include <asm/io.h> |
| 29 | #include <asm/pci-bridge.h> |
| 30 | #include <asm/machdep.h> |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 31 | #include <asm/dcr.h> |
| 32 | #include <asm/dcr-regs.h> |
Ilya Yanok | cc2e113 | 2008-09-01 17:53:22 +1000 | [diff] [blame] | 33 | #include <mm/mmu_decl.h> |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 34 | |
| 35 | #include "ppc4xx_pci.h" |
| 36 | |
| 37 | static int dma_offset_set; |
| 38 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 39 | #define U64_TO_U32_LOW(val) ((u32)((val) & 0x00000000ffffffffULL)) |
| 40 | #define U64_TO_U32_HIGH(val) ((u32)((val) >> 32)) |
| 41 | |
Jeremy Fitzhardinge | 8308c54 | 2008-09-11 01:31:50 -0700 | [diff] [blame] | 42 | #define RES_TO_U32_LOW(val) \ |
| 43 | ((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_LOW(val) : (val)) |
| 44 | #define RES_TO_U32_HIGH(val) \ |
| 45 | ((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_HIGH(val) : (0)) |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 46 | |
Stefan Roese | accf5ef | 2007-12-21 15:39:38 +1100 | [diff] [blame] | 47 | static inline int ppc440spe_revA(void) |
| 48 | { |
| 49 | /* Catch both 440SPe variants, with and without RAID6 support */ |
| 50 | if ((mfspr(SPRN_PVR) & 0xffefffff) == 0x53421890) |
| 51 | return 1; |
| 52 | else |
| 53 | return 0; |
| 54 | } |
| 55 | |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 56 | static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev) |
| 57 | { |
| 58 | struct pci_controller *hose; |
| 59 | int i; |
| 60 | |
| 61 | if (dev->devfn != 0 || dev->bus->self != NULL) |
| 62 | return; |
| 63 | |
| 64 | hose = pci_bus_to_host(dev->bus); |
| 65 | if (hose == NULL) |
| 66 | return; |
| 67 | |
| 68 | if (!of_device_is_compatible(hose->dn, "ibm,plb-pciex") && |
| 69 | !of_device_is_compatible(hose->dn, "ibm,plb-pcix") && |
| 70 | !of_device_is_compatible(hose->dn, "ibm,plb-pci")) |
| 71 | return; |
| 72 | |
Josh Boyer | 5ce4b59 | 2008-06-17 19:01:38 -0400 | [diff] [blame] | 73 | if (of_device_is_compatible(hose->dn, "ibm,plb440epx-pci") || |
| 74 | of_device_is_compatible(hose->dn, "ibm,plb440grx-pci")) { |
| 75 | hose->indirect_type |= PPC_INDIRECT_TYPE_BROKEN_MRM; |
| 76 | } |
| 77 | |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 78 | /* Hide the PCI host BARs from the kernel as their content doesn't |
| 79 | * fit well in the resource management |
| 80 | */ |
| 81 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
| 82 | dev->resource[i].start = dev->resource[i].end = 0; |
| 83 | dev->resource[i].flags = 0; |
| 84 | } |
| 85 | |
| 86 | printk(KERN_INFO "PCI: Hiding 4xx host bridge resources %s\n", |
| 87 | pci_name(dev)); |
| 88 | } |
| 89 | DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_ppc4xx_pci_bridge); |
| 90 | |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 91 | static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose, |
| 92 | void __iomem *reg, |
| 93 | struct resource *res) |
| 94 | { |
| 95 | u64 size; |
| 96 | const u32 *ranges; |
| 97 | int rlen; |
| 98 | int pna = of_n_addr_cells(hose->dn); |
| 99 | int np = pna + 5; |
| 100 | |
| 101 | /* Default */ |
| 102 | res->start = 0; |
Ilya Yanok | cc2e113 | 2008-09-01 17:53:22 +1000 | [diff] [blame] | 103 | size = 0x80000000; |
| 104 | res->end = size - 1; |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 105 | res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH; |
| 106 | |
| 107 | /* Get dma-ranges property */ |
| 108 | ranges = of_get_property(hose->dn, "dma-ranges", &rlen); |
| 109 | if (ranges == NULL) |
| 110 | goto out; |
| 111 | |
| 112 | /* Walk it */ |
| 113 | while ((rlen -= np * 4) >= 0) { |
| 114 | u32 pci_space = ranges[0]; |
| 115 | u64 pci_addr = of_read_number(ranges + 1, 2); |
| 116 | u64 cpu_addr = of_translate_dma_address(hose->dn, ranges + 3); |
| 117 | size = of_read_number(ranges + pna + 3, 2); |
| 118 | ranges += np; |
| 119 | if (cpu_addr == OF_BAD_ADDR || size == 0) |
| 120 | continue; |
| 121 | |
| 122 | /* We only care about memory */ |
| 123 | if ((pci_space & 0x03000000) != 0x02000000) |
| 124 | continue; |
| 125 | |
| 126 | /* We currently only support memory at 0, and pci_addr |
| 127 | * within 32 bits space |
| 128 | */ |
| 129 | if (cpu_addr != 0 || pci_addr > 0xffffffff) { |
| 130 | printk(KERN_WARNING "%s: Ignored unsupported dma range" |
| 131 | " 0x%016llx...0x%016llx -> 0x%016llx\n", |
| 132 | hose->dn->full_name, |
| 133 | pci_addr, pci_addr + size - 1, cpu_addr); |
| 134 | continue; |
| 135 | } |
| 136 | |
| 137 | /* Check if not prefetchable */ |
| 138 | if (!(pci_space & 0x40000000)) |
| 139 | res->flags &= ~IORESOURCE_PREFETCH; |
| 140 | |
| 141 | |
| 142 | /* Use that */ |
| 143 | res->start = pci_addr; |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 144 | /* Beware of 32 bits resources */ |
Jeremy Fitzhardinge | 8308c54 | 2008-09-11 01:31:50 -0700 | [diff] [blame] | 145 | if (sizeof(resource_size_t) == sizeof(u32) && |
| 146 | (pci_addr + size) > 0x100000000ull) |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 147 | res->end = 0xffffffff; |
| 148 | else |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 149 | res->end = res->start + size - 1; |
| 150 | break; |
| 151 | } |
| 152 | |
| 153 | /* We only support one global DMA offset */ |
| 154 | if (dma_offset_set && pci_dram_offset != res->start) { |
| 155 | printk(KERN_ERR "%s: dma-ranges(s) mismatch\n", |
| 156 | hose->dn->full_name); |
| 157 | return -ENXIO; |
| 158 | } |
| 159 | |
| 160 | /* Check that we can fit all of memory as we don't support |
| 161 | * DMA bounce buffers |
| 162 | */ |
| 163 | if (size < total_memory) { |
| 164 | printk(KERN_ERR "%s: dma-ranges too small " |
Ilya Yanok | cc2e113 | 2008-09-01 17:53:22 +1000 | [diff] [blame] | 165 | "(size=%llx total_memory=%llx)\n", |
| 166 | hose->dn->full_name, size, (u64)total_memory); |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 167 | return -ENXIO; |
| 168 | } |
| 169 | |
| 170 | /* Check we are a power of 2 size and that base is a multiple of size*/ |
Ilya Yanok | cc2e113 | 2008-09-01 17:53:22 +1000 | [diff] [blame] | 171 | if ((size & (size - 1)) != 0 || |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 172 | (res->start & (size - 1)) != 0) { |
| 173 | printk(KERN_ERR "%s: dma-ranges unaligned\n", |
| 174 | hose->dn->full_name); |
| 175 | return -ENXIO; |
| 176 | } |
| 177 | |
| 178 | /* Check that we are fully contained within 32 bits space */ |
| 179 | if (res->end > 0xffffffff) { |
| 180 | printk(KERN_ERR "%s: dma-ranges outside of 32 bits space\n", |
| 181 | hose->dn->full_name); |
| 182 | return -ENXIO; |
| 183 | } |
| 184 | out: |
| 185 | dma_offset_set = 1; |
| 186 | pci_dram_offset = res->start; |
| 187 | |
| 188 | printk(KERN_INFO "4xx PCI DMA offset set to 0x%08lx\n", |
| 189 | pci_dram_offset); |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * 4xx PCI 2.x part |
| 195 | */ |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 196 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 197 | static int __init ppc4xx_setup_one_pci_PMM(struct pci_controller *hose, |
| 198 | void __iomem *reg, |
| 199 | u64 plb_addr, |
| 200 | u64 pci_addr, |
| 201 | u64 size, |
| 202 | unsigned int flags, |
| 203 | int index) |
| 204 | { |
| 205 | u32 ma, pcila, pciha; |
| 206 | |
| 207 | if ((plb_addr + size) > 0xffffffffull || !is_power_of_2(size) || |
| 208 | size < 0x1000 || (plb_addr & (size - 1)) != 0) { |
| 209 | printk(KERN_WARNING "%s: Resource out of range\n", |
| 210 | hose->dn->full_name); |
| 211 | return -1; |
| 212 | } |
| 213 | ma = (0xffffffffu << ilog2(size)) | 1; |
| 214 | if (flags & IORESOURCE_PREFETCH) |
| 215 | ma |= 2; |
| 216 | |
| 217 | pciha = RES_TO_U32_HIGH(pci_addr); |
| 218 | pcila = RES_TO_U32_LOW(pci_addr); |
| 219 | |
| 220 | writel(plb_addr, reg + PCIL0_PMM0LA + (0x10 * index)); |
| 221 | writel(pcila, reg + PCIL0_PMM0PCILA + (0x10 * index)); |
| 222 | writel(pciha, reg + PCIL0_PMM0PCIHA + (0x10 * index)); |
| 223 | writel(ma, reg + PCIL0_PMM0MA + (0x10 * index)); |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 228 | static void __init ppc4xx_configure_pci_PMMs(struct pci_controller *hose, |
| 229 | void __iomem *reg) |
| 230 | { |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 231 | int i, j, found_isa_hole = 0; |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 232 | |
| 233 | /* Setup outbound memory windows */ |
| 234 | for (i = j = 0; i < 3; i++) { |
| 235 | struct resource *res = &hose->mem_resources[i]; |
| 236 | |
| 237 | /* we only care about memory windows */ |
| 238 | if (!(res->flags & IORESOURCE_MEM)) |
| 239 | continue; |
| 240 | if (j > 2) { |
| 241 | printk(KERN_WARNING "%s: Too many ranges\n", |
| 242 | hose->dn->full_name); |
| 243 | break; |
| 244 | } |
| 245 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 246 | /* Configure the resource */ |
| 247 | if (ppc4xx_setup_one_pci_PMM(hose, reg, |
| 248 | res->start, |
| 249 | res->start - hose->pci_mem_offset, |
| 250 | res->end + 1 - res->start, |
| 251 | res->flags, |
| 252 | j) == 0) { |
| 253 | j++; |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 254 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 255 | /* If the resource PCI address is 0 then we have our |
| 256 | * ISA memory hole |
| 257 | */ |
| 258 | if (res->start == hose->pci_mem_offset) |
| 259 | found_isa_hole = 1; |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 260 | } |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 261 | } |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 262 | |
| 263 | /* Handle ISA memory hole if not already covered */ |
| 264 | if (j <= 2 && !found_isa_hole && hose->isa_mem_size) |
| 265 | if (ppc4xx_setup_one_pci_PMM(hose, reg, hose->isa_mem_phys, 0, |
| 266 | hose->isa_mem_size, 0, j) == 0) |
| 267 | printk(KERN_INFO "%s: Legacy ISA memory support enabled\n", |
| 268 | hose->dn->full_name); |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | static void __init ppc4xx_configure_pci_PTMs(struct pci_controller *hose, |
| 272 | void __iomem *reg, |
| 273 | const struct resource *res) |
| 274 | { |
| 275 | resource_size_t size = res->end - res->start + 1; |
| 276 | u32 sa; |
| 277 | |
| 278 | /* Calculate window size */ |
| 279 | sa = (0xffffffffu << ilog2(size)) | 1; |
| 280 | sa |= 0x1; |
| 281 | |
| 282 | /* RAM is always at 0 local for now */ |
| 283 | writel(0, reg + PCIL0_PTM1LA); |
| 284 | writel(sa, reg + PCIL0_PTM1MS); |
| 285 | |
| 286 | /* Map on PCI side */ |
| 287 | early_write_config_dword(hose, hose->first_busno, 0, |
| 288 | PCI_BASE_ADDRESS_1, res->start); |
| 289 | early_write_config_dword(hose, hose->first_busno, 0, |
| 290 | PCI_BASE_ADDRESS_2, 0x00000000); |
| 291 | early_write_config_word(hose, hose->first_busno, 0, |
| 292 | PCI_COMMAND, 0x0006); |
| 293 | } |
| 294 | |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 295 | static void __init ppc4xx_probe_pci_bridge(struct device_node *np) |
| 296 | { |
| 297 | /* NYI */ |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 298 | struct resource rsrc_cfg; |
| 299 | struct resource rsrc_reg; |
| 300 | struct resource dma_window; |
| 301 | struct pci_controller *hose = NULL; |
| 302 | void __iomem *reg = NULL; |
| 303 | const int *bus_range; |
| 304 | int primary = 0; |
| 305 | |
Matthias Fuchs | 5a013fc | 2008-09-10 05:55:46 +0000 | [diff] [blame] | 306 | /* Check if device is enabled */ |
| 307 | if (!of_device_is_available(np)) { |
| 308 | printk(KERN_INFO "%s: Port disabled via device-tree\n", |
| 309 | np->full_name); |
| 310 | return; |
| 311 | } |
| 312 | |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 313 | /* Fetch config space registers address */ |
| 314 | if (of_address_to_resource(np, 0, &rsrc_cfg)) { |
Matthias Fuchs | 5a013fc | 2008-09-10 05:55:46 +0000 | [diff] [blame] | 315 | printk(KERN_ERR "%s: Can't get PCI config register base !", |
Benjamin Herrenschmidt | c839e0e | 2007-12-21 15:39:23 +1100 | [diff] [blame] | 316 | np->full_name); |
| 317 | return; |
| 318 | } |
| 319 | /* Fetch host bridge internal registers address */ |
| 320 | if (of_address_to_resource(np, 3, &rsrc_reg)) { |
| 321 | printk(KERN_ERR "%s: Can't get PCI internal register base !", |
| 322 | np->full_name); |
| 323 | return; |
| 324 | } |
| 325 | |
| 326 | /* Check if primary bridge */ |
| 327 | if (of_get_property(np, "primary", NULL)) |
| 328 | primary = 1; |
| 329 | |
| 330 | /* Get bus range if any */ |
| 331 | bus_range = of_get_property(np, "bus-range", NULL); |
| 332 | |
| 333 | /* Map registers */ |
| 334 | reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start); |
| 335 | if (reg == NULL) { |
| 336 | printk(KERN_ERR "%s: Can't map registers !", np->full_name); |
| 337 | goto fail; |
| 338 | } |
| 339 | |
| 340 | /* Allocate the host controller data structure */ |
| 341 | hose = pcibios_alloc_controller(np); |
| 342 | if (!hose) |
| 343 | goto fail; |
| 344 | |
| 345 | hose->first_busno = bus_range ? bus_range[0] : 0x0; |
| 346 | hose->last_busno = bus_range ? bus_range[1] : 0xff; |
| 347 | |
| 348 | /* Setup config space */ |
| 349 | setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0); |
| 350 | |
| 351 | /* Disable all windows */ |
| 352 | writel(0, reg + PCIL0_PMM0MA); |
| 353 | writel(0, reg + PCIL0_PMM1MA); |
| 354 | writel(0, reg + PCIL0_PMM2MA); |
| 355 | writel(0, reg + PCIL0_PTM1MS); |
| 356 | writel(0, reg + PCIL0_PTM2MS); |
| 357 | |
| 358 | /* Parse outbound mapping resources */ |
| 359 | pci_process_bridge_OF_ranges(hose, np, primary); |
| 360 | |
| 361 | /* Parse inbound mapping resources */ |
| 362 | if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) |
| 363 | goto fail; |
| 364 | |
| 365 | /* Configure outbound ranges POMs */ |
| 366 | ppc4xx_configure_pci_PMMs(hose, reg); |
| 367 | |
| 368 | /* Configure inbound ranges PIMs */ |
| 369 | ppc4xx_configure_pci_PTMs(hose, reg, &dma_window); |
| 370 | |
| 371 | /* We don't need the registers anymore */ |
| 372 | iounmap(reg); |
| 373 | return; |
| 374 | |
| 375 | fail: |
| 376 | if (hose) |
| 377 | pcibios_free_controller(hose); |
| 378 | if (reg) |
| 379 | iounmap(reg); |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | /* |
| 383 | * 4xx PCI-X part |
| 384 | */ |
| 385 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 386 | static int __init ppc4xx_setup_one_pcix_POM(struct pci_controller *hose, |
| 387 | void __iomem *reg, |
| 388 | u64 plb_addr, |
| 389 | u64 pci_addr, |
| 390 | u64 size, |
| 391 | unsigned int flags, |
| 392 | int index) |
| 393 | { |
| 394 | u32 lah, lal, pciah, pcial, sa; |
| 395 | |
| 396 | if (!is_power_of_2(size) || size < 0x1000 || |
| 397 | (plb_addr & (size - 1)) != 0) { |
| 398 | printk(KERN_WARNING "%s: Resource out of range\n", |
| 399 | hose->dn->full_name); |
| 400 | return -1; |
| 401 | } |
| 402 | |
| 403 | /* Calculate register values */ |
| 404 | lah = RES_TO_U32_HIGH(plb_addr); |
| 405 | lal = RES_TO_U32_LOW(plb_addr); |
| 406 | pciah = RES_TO_U32_HIGH(pci_addr); |
| 407 | pcial = RES_TO_U32_LOW(pci_addr); |
| 408 | sa = (0xffffffffu << ilog2(size)) | 0x1; |
| 409 | |
| 410 | /* Program register values */ |
| 411 | if (index == 0) { |
| 412 | writel(lah, reg + PCIX0_POM0LAH); |
| 413 | writel(lal, reg + PCIX0_POM0LAL); |
| 414 | writel(pciah, reg + PCIX0_POM0PCIAH); |
| 415 | writel(pcial, reg + PCIX0_POM0PCIAL); |
| 416 | writel(sa, reg + PCIX0_POM0SA); |
| 417 | } else { |
| 418 | writel(lah, reg + PCIX0_POM1LAH); |
| 419 | writel(lal, reg + PCIX0_POM1LAL); |
| 420 | writel(pciah, reg + PCIX0_POM1PCIAH); |
| 421 | writel(pcial, reg + PCIX0_POM1PCIAL); |
| 422 | writel(sa, reg + PCIX0_POM1SA); |
| 423 | } |
| 424 | |
| 425 | return 0; |
| 426 | } |
| 427 | |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 428 | static void __init ppc4xx_configure_pcix_POMs(struct pci_controller *hose, |
| 429 | void __iomem *reg) |
| 430 | { |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 431 | int i, j, found_isa_hole = 0; |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 432 | |
| 433 | /* Setup outbound memory windows */ |
| 434 | for (i = j = 0; i < 3; i++) { |
| 435 | struct resource *res = &hose->mem_resources[i]; |
| 436 | |
| 437 | /* we only care about memory windows */ |
| 438 | if (!(res->flags & IORESOURCE_MEM)) |
| 439 | continue; |
| 440 | if (j > 1) { |
| 441 | printk(KERN_WARNING "%s: Too many ranges\n", |
| 442 | hose->dn->full_name); |
| 443 | break; |
| 444 | } |
| 445 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 446 | /* Configure the resource */ |
| 447 | if (ppc4xx_setup_one_pcix_POM(hose, reg, |
| 448 | res->start, |
| 449 | res->start - hose->pci_mem_offset, |
| 450 | res->end + 1 - res->start, |
| 451 | res->flags, |
| 452 | j) == 0) { |
| 453 | j++; |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 454 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 455 | /* If the resource PCI address is 0 then we have our |
| 456 | * ISA memory hole |
| 457 | */ |
| 458 | if (res->start == hose->pci_mem_offset) |
| 459 | found_isa_hole = 1; |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 460 | } |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 461 | } |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 462 | |
| 463 | /* Handle ISA memory hole if not already covered */ |
| 464 | if (j <= 1 && !found_isa_hole && hose->isa_mem_size) |
| 465 | if (ppc4xx_setup_one_pcix_POM(hose, reg, hose->isa_mem_phys, 0, |
| 466 | hose->isa_mem_size, 0, j) == 0) |
| 467 | printk(KERN_INFO "%s: Legacy ISA memory support enabled\n", |
| 468 | hose->dn->full_name); |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | static void __init ppc4xx_configure_pcix_PIMs(struct pci_controller *hose, |
| 472 | void __iomem *reg, |
| 473 | const struct resource *res, |
| 474 | int big_pim, |
| 475 | int enable_msi_hole) |
| 476 | { |
| 477 | resource_size_t size = res->end - res->start + 1; |
| 478 | u32 sa; |
| 479 | |
| 480 | /* RAM is always at 0 */ |
| 481 | writel(0x00000000, reg + PCIX0_PIM0LAH); |
| 482 | writel(0x00000000, reg + PCIX0_PIM0LAL); |
| 483 | |
| 484 | /* Calculate window size */ |
| 485 | sa = (0xffffffffu << ilog2(size)) | 1; |
| 486 | sa |= 0x1; |
| 487 | if (res->flags & IORESOURCE_PREFETCH) |
| 488 | sa |= 0x2; |
| 489 | if (enable_msi_hole) |
| 490 | sa |= 0x4; |
| 491 | writel(sa, reg + PCIX0_PIM0SA); |
| 492 | if (big_pim) |
| 493 | writel(0xffffffff, reg + PCIX0_PIM0SAH); |
| 494 | |
| 495 | /* Map on PCI side */ |
| 496 | writel(0x00000000, reg + PCIX0_BAR0H); |
| 497 | writel(res->start, reg + PCIX0_BAR0L); |
| 498 | writew(0x0006, reg + PCIX0_COMMAND); |
| 499 | } |
| 500 | |
| 501 | static void __init ppc4xx_probe_pcix_bridge(struct device_node *np) |
| 502 | { |
| 503 | struct resource rsrc_cfg; |
| 504 | struct resource rsrc_reg; |
| 505 | struct resource dma_window; |
| 506 | struct pci_controller *hose = NULL; |
| 507 | void __iomem *reg = NULL; |
| 508 | const int *bus_range; |
| 509 | int big_pim = 0, msi = 0, primary = 0; |
| 510 | |
| 511 | /* Fetch config space registers address */ |
| 512 | if (of_address_to_resource(np, 0, &rsrc_cfg)) { |
| 513 | printk(KERN_ERR "%s:Can't get PCI-X config register base !", |
| 514 | np->full_name); |
| 515 | return; |
| 516 | } |
| 517 | /* Fetch host bridge internal registers address */ |
| 518 | if (of_address_to_resource(np, 3, &rsrc_reg)) { |
| 519 | printk(KERN_ERR "%s: Can't get PCI-X internal register base !", |
| 520 | np->full_name); |
| 521 | return; |
| 522 | } |
| 523 | |
| 524 | /* Check if it supports large PIMs (440GX) */ |
| 525 | if (of_get_property(np, "large-inbound-windows", NULL)) |
| 526 | big_pim = 1; |
| 527 | |
| 528 | /* Check if we should enable MSIs inbound hole */ |
| 529 | if (of_get_property(np, "enable-msi-hole", NULL)) |
| 530 | msi = 1; |
| 531 | |
| 532 | /* Check if primary bridge */ |
| 533 | if (of_get_property(np, "primary", NULL)) |
| 534 | primary = 1; |
| 535 | |
| 536 | /* Get bus range if any */ |
| 537 | bus_range = of_get_property(np, "bus-range", NULL); |
| 538 | |
| 539 | /* Map registers */ |
| 540 | reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start); |
| 541 | if (reg == NULL) { |
| 542 | printk(KERN_ERR "%s: Can't map registers !", np->full_name); |
| 543 | goto fail; |
| 544 | } |
| 545 | |
| 546 | /* Allocate the host controller data structure */ |
| 547 | hose = pcibios_alloc_controller(np); |
| 548 | if (!hose) |
| 549 | goto fail; |
| 550 | |
| 551 | hose->first_busno = bus_range ? bus_range[0] : 0x0; |
| 552 | hose->last_busno = bus_range ? bus_range[1] : 0xff; |
| 553 | |
| 554 | /* Setup config space */ |
| 555 | setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0); |
| 556 | |
| 557 | /* Disable all windows */ |
| 558 | writel(0, reg + PCIX0_POM0SA); |
| 559 | writel(0, reg + PCIX0_POM1SA); |
| 560 | writel(0, reg + PCIX0_POM2SA); |
| 561 | writel(0, reg + PCIX0_PIM0SA); |
| 562 | writel(0, reg + PCIX0_PIM1SA); |
| 563 | writel(0, reg + PCIX0_PIM2SA); |
| 564 | if (big_pim) { |
| 565 | writel(0, reg + PCIX0_PIM0SAH); |
| 566 | writel(0, reg + PCIX0_PIM2SAH); |
| 567 | } |
| 568 | |
| 569 | /* Parse outbound mapping resources */ |
| 570 | pci_process_bridge_OF_ranges(hose, np, primary); |
| 571 | |
| 572 | /* Parse inbound mapping resources */ |
| 573 | if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) |
| 574 | goto fail; |
| 575 | |
| 576 | /* Configure outbound ranges POMs */ |
| 577 | ppc4xx_configure_pcix_POMs(hose, reg); |
| 578 | |
| 579 | /* Configure inbound ranges PIMs */ |
| 580 | ppc4xx_configure_pcix_PIMs(hose, reg, &dma_window, big_pim, msi); |
| 581 | |
| 582 | /* We don't need the registers anymore */ |
| 583 | iounmap(reg); |
| 584 | return; |
| 585 | |
| 586 | fail: |
| 587 | if (hose) |
| 588 | pcibios_free_controller(hose); |
| 589 | if (reg) |
| 590 | iounmap(reg); |
| 591 | } |
| 592 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 593 | #ifdef CONFIG_PPC4xx_PCI_EXPRESS |
| 594 | |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 595 | /* |
| 596 | * 4xx PCI-Express part |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 597 | * |
| 598 | * We support 3 parts currently based on the compatible property: |
| 599 | * |
Stefan Roese | accf5ef | 2007-12-21 15:39:38 +1100 | [diff] [blame] | 600 | * ibm,plb-pciex-440spe |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 601 | * ibm,plb-pciex-405ex |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 602 | * ibm,plb-pciex-460ex |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 603 | * |
| 604 | * Anything else will be rejected for now as they are all subtly |
| 605 | * different unfortunately. |
| 606 | * |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 607 | */ |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 608 | |
Stefan Roese | 78994e2 | 2007-12-31 16:41:15 +1100 | [diff] [blame] | 609 | #define MAX_PCIE_BUS_MAPPED 0x40 |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 610 | |
| 611 | struct ppc4xx_pciex_port |
| 612 | { |
| 613 | struct pci_controller *hose; |
| 614 | struct device_node *node; |
| 615 | unsigned int index; |
| 616 | int endpoint; |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 617 | int link; |
| 618 | int has_ibpre; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 619 | unsigned int sdr_base; |
| 620 | dcr_host_t dcrs; |
| 621 | struct resource cfg_space; |
| 622 | struct resource utl_regs; |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 623 | void __iomem *utl_base; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 624 | }; |
| 625 | |
| 626 | static struct ppc4xx_pciex_port *ppc4xx_pciex_ports; |
| 627 | static unsigned int ppc4xx_pciex_port_count; |
| 628 | |
| 629 | struct ppc4xx_pciex_hwops |
| 630 | { |
| 631 | int (*core_init)(struct device_node *np); |
| 632 | int (*port_init_hw)(struct ppc4xx_pciex_port *port); |
| 633 | int (*setup_utl)(struct ppc4xx_pciex_port *port); |
| 634 | }; |
| 635 | |
| 636 | static struct ppc4xx_pciex_hwops *ppc4xx_pciex_hwops; |
| 637 | |
| 638 | #ifdef CONFIG_44x |
| 639 | |
| 640 | /* Check various reset bits of the 440SPe PCIe core */ |
| 641 | static int __init ppc440spe_pciex_check_reset(struct device_node *np) |
| 642 | { |
| 643 | u32 valPE0, valPE1, valPE2; |
| 644 | int err = 0; |
| 645 | |
| 646 | /* SDR0_PEGPLLLCT1 reset */ |
| 647 | if (!(mfdcri(SDR0, PESDR0_PLLLCT1) & 0x01000000)) { |
| 648 | /* |
| 649 | * the PCIe core was probably already initialised |
| 650 | * by firmware - let's re-reset RCSSET regs |
| 651 | * |
| 652 | * -- Shouldn't we also re-reset the whole thing ? -- BenH |
| 653 | */ |
| 654 | pr_debug("PCIE: SDR0_PLLLCT1 already reset.\n"); |
| 655 | mtdcri(SDR0, PESDR0_440SPE_RCSSET, 0x01010000); |
| 656 | mtdcri(SDR0, PESDR1_440SPE_RCSSET, 0x01010000); |
| 657 | mtdcri(SDR0, PESDR2_440SPE_RCSSET, 0x01010000); |
| 658 | } |
| 659 | |
| 660 | valPE0 = mfdcri(SDR0, PESDR0_440SPE_RCSSET); |
| 661 | valPE1 = mfdcri(SDR0, PESDR1_440SPE_RCSSET); |
| 662 | valPE2 = mfdcri(SDR0, PESDR2_440SPE_RCSSET); |
| 663 | |
| 664 | /* SDR0_PExRCSSET rstgu */ |
| 665 | if (!(valPE0 & 0x01000000) || |
| 666 | !(valPE1 & 0x01000000) || |
| 667 | !(valPE2 & 0x01000000)) { |
| 668 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n"); |
| 669 | err = -1; |
| 670 | } |
| 671 | |
| 672 | /* SDR0_PExRCSSET rstdl */ |
| 673 | if (!(valPE0 & 0x00010000) || |
| 674 | !(valPE1 & 0x00010000) || |
| 675 | !(valPE2 & 0x00010000)) { |
| 676 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n"); |
| 677 | err = -1; |
| 678 | } |
| 679 | |
| 680 | /* SDR0_PExRCSSET rstpyn */ |
| 681 | if ((valPE0 & 0x00001000) || |
| 682 | (valPE1 & 0x00001000) || |
| 683 | (valPE2 & 0x00001000)) { |
| 684 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n"); |
| 685 | err = -1; |
| 686 | } |
| 687 | |
| 688 | /* SDR0_PExRCSSET hldplb */ |
| 689 | if ((valPE0 & 0x10000000) || |
| 690 | (valPE1 & 0x10000000) || |
| 691 | (valPE2 & 0x10000000)) { |
| 692 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n"); |
| 693 | err = -1; |
| 694 | } |
| 695 | |
| 696 | /* SDR0_PExRCSSET rdy */ |
| 697 | if ((valPE0 & 0x00100000) || |
| 698 | (valPE1 & 0x00100000) || |
| 699 | (valPE2 & 0x00100000)) { |
| 700 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n"); |
| 701 | err = -1; |
| 702 | } |
| 703 | |
| 704 | /* SDR0_PExRCSSET shutdown */ |
| 705 | if ((valPE0 & 0x00000100) || |
| 706 | (valPE1 & 0x00000100) || |
| 707 | (valPE2 & 0x00000100)) { |
| 708 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n"); |
| 709 | err = -1; |
| 710 | } |
| 711 | |
| 712 | return err; |
| 713 | } |
| 714 | |
| 715 | /* Global PCIe core initializations for 440SPe core */ |
| 716 | static int __init ppc440spe_pciex_core_init(struct device_node *np) |
| 717 | { |
| 718 | int time_out = 20; |
| 719 | |
| 720 | /* Set PLL clock receiver to LVPECL */ |
Valentine Barshak | 6e42b21 | 2008-03-07 01:34:52 +1100 | [diff] [blame] | 721 | dcri_clrset(SDR0, PESDR0_PLLLCT1, 0, 1 << 28); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 722 | |
| 723 | /* Shouldn't we do all the calibration stuff etc... here ? */ |
| 724 | if (ppc440spe_pciex_check_reset(np)) |
| 725 | return -ENXIO; |
| 726 | |
| 727 | if (!(mfdcri(SDR0, PESDR0_PLLLCT2) & 0x10000)) { |
| 728 | printk(KERN_INFO "PCIE: PESDR_PLLCT2 resistance calibration " |
| 729 | "failed (0x%08x)\n", |
| 730 | mfdcri(SDR0, PESDR0_PLLLCT2)); |
| 731 | return -1; |
| 732 | } |
| 733 | |
| 734 | /* De-assert reset of PCIe PLL, wait for lock */ |
Valentine Barshak | 6e42b21 | 2008-03-07 01:34:52 +1100 | [diff] [blame] | 735 | dcri_clrset(SDR0, PESDR0_PLLLCT1, 1 << 24, 0); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 736 | udelay(3); |
| 737 | |
| 738 | while (time_out) { |
| 739 | if (!(mfdcri(SDR0, PESDR0_PLLLCT3) & 0x10000000)) { |
| 740 | time_out--; |
| 741 | udelay(1); |
| 742 | } else |
| 743 | break; |
| 744 | } |
| 745 | if (!time_out) { |
| 746 | printk(KERN_INFO "PCIE: VCO output not locked\n"); |
| 747 | return -1; |
| 748 | } |
| 749 | |
| 750 | pr_debug("PCIE initialization OK\n"); |
| 751 | |
| 752 | return 3; |
| 753 | } |
| 754 | |
| 755 | static int ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
| 756 | { |
| 757 | u32 val = 1 << 24; |
| 758 | |
| 759 | if (port->endpoint) |
| 760 | val = PTYPE_LEGACY_ENDPOINT << 20; |
| 761 | else |
| 762 | val = PTYPE_ROOT_PORT << 20; |
| 763 | |
| 764 | if (port->index == 0) |
| 765 | val |= LNKW_X8 << 12; |
| 766 | else |
| 767 | val |= LNKW_X4 << 12; |
| 768 | |
| 769 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); |
| 770 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222); |
Stefan Roese | accf5ef | 2007-12-21 15:39:38 +1100 | [diff] [blame] | 771 | if (ppc440spe_revA()) |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 772 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000); |
| 773 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000); |
| 774 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000); |
| 775 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL2SET1, 0x35000000); |
| 776 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL3SET1, 0x35000000); |
| 777 | if (port->index == 0) { |
| 778 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL4SET1, |
| 779 | 0x35000000); |
| 780 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL5SET1, |
| 781 | 0x35000000); |
| 782 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL6SET1, |
| 783 | 0x35000000); |
| 784 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL7SET1, |
| 785 | 0x35000000); |
| 786 | } |
Valentine Barshak | 6e42b21 | 2008-03-07 01:34:52 +1100 | [diff] [blame] | 787 | dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, |
| 788 | (1 << 24) | (1 << 16), 1 << 12); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 789 | |
| 790 | return 0; |
| 791 | } |
| 792 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 793 | static int ppc440speA_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
| 794 | { |
| 795 | return ppc440spe_pciex_init_port_hw(port); |
| 796 | } |
| 797 | |
| 798 | static int ppc440speB_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
| 799 | { |
| 800 | int rc = ppc440spe_pciex_init_port_hw(port); |
| 801 | |
| 802 | port->has_ibpre = 1; |
| 803 | |
| 804 | return rc; |
| 805 | } |
| 806 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 807 | static int ppc440speA_pciex_init_utl(struct ppc4xx_pciex_port *port) |
| 808 | { |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 809 | /* XXX Check what that value means... I hate magic */ |
| 810 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x68782800); |
| 811 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 812 | /* |
| 813 | * Set buffer allocations and then assert VRB and TXE. |
| 814 | */ |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 815 | out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); |
| 816 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); |
| 817 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x10000000); |
| 818 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x53000000); |
| 819 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x08000000); |
| 820 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x10000000); |
| 821 | out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000); |
| 822 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 823 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | static int ppc440speB_pciex_init_utl(struct ppc4xx_pciex_port *port) |
| 828 | { |
| 829 | /* Report CRS to the operating system */ |
| 830 | out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 831 | |
| 832 | return 0; |
| 833 | } |
| 834 | |
| 835 | static struct ppc4xx_pciex_hwops ppc440speA_pcie_hwops __initdata = |
| 836 | { |
| 837 | .core_init = ppc440spe_pciex_core_init, |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 838 | .port_init_hw = ppc440speA_pciex_init_port_hw, |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 839 | .setup_utl = ppc440speA_pciex_init_utl, |
| 840 | }; |
| 841 | |
| 842 | static struct ppc4xx_pciex_hwops ppc440speB_pcie_hwops __initdata = |
| 843 | { |
| 844 | .core_init = ppc440spe_pciex_core_init, |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 845 | .port_init_hw = ppc440speB_pciex_init_port_hw, |
| 846 | .setup_utl = ppc440speB_pciex_init_utl, |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 847 | }; |
| 848 | |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 849 | static int __init ppc460ex_pciex_core_init(struct device_node *np) |
| 850 | { |
| 851 | /* Nothing to do, return 2 ports */ |
| 852 | return 2; |
| 853 | } |
| 854 | |
| 855 | static int ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
| 856 | { |
| 857 | u32 val; |
| 858 | u32 utlset1; |
| 859 | |
Stefan Roese | 5f91925 | 2008-04-02 00:45:00 +1100 | [diff] [blame] | 860 | if (port->endpoint) |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 861 | val = PTYPE_LEGACY_ENDPOINT << 20; |
Stefan Roese | 5f91925 | 2008-04-02 00:45:00 +1100 | [diff] [blame] | 862 | else |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 863 | val = PTYPE_ROOT_PORT << 20; |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 864 | |
| 865 | if (port->index == 0) { |
| 866 | val |= LNKW_X1 << 12; |
Stefan Roese | 5f91925 | 2008-04-02 00:45:00 +1100 | [diff] [blame] | 867 | utlset1 = 0x20000000; |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 868 | } else { |
| 869 | val |= LNKW_X4 << 12; |
Stefan Roese | 5f91925 | 2008-04-02 00:45:00 +1100 | [diff] [blame] | 870 | utlset1 = 0x20101101; |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 871 | } |
| 872 | |
| 873 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); |
| 874 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, utlset1); |
| 875 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01210000); |
| 876 | |
| 877 | switch (port->index) { |
| 878 | case 0: |
| 879 | mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230); |
Tirumala R Marri | e30c987 | 2008-08-21 18:53:34 +0000 | [diff] [blame] | 880 | mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130); |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 881 | mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006); |
| 882 | |
| 883 | mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST,0x10000000); |
| 884 | break; |
| 885 | |
| 886 | case 1: |
| 887 | mtdcri(SDR0, PESDR1_460EX_L0CDRCTL, 0x00003230); |
| 888 | mtdcri(SDR0, PESDR1_460EX_L1CDRCTL, 0x00003230); |
| 889 | mtdcri(SDR0, PESDR1_460EX_L2CDRCTL, 0x00003230); |
| 890 | mtdcri(SDR0, PESDR1_460EX_L3CDRCTL, 0x00003230); |
Tirumala R Marri | e30c987 | 2008-08-21 18:53:34 +0000 | [diff] [blame] | 891 | mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000130); |
| 892 | mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000130); |
| 893 | mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000130); |
| 894 | mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000130); |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 895 | mtdcri(SDR0, PESDR1_460EX_L0CLK, 0x00000006); |
| 896 | mtdcri(SDR0, PESDR1_460EX_L1CLK, 0x00000006); |
| 897 | mtdcri(SDR0, PESDR1_460EX_L2CLK, 0x00000006); |
| 898 | mtdcri(SDR0, PESDR1_460EX_L3CLK, 0x00000006); |
| 899 | |
| 900 | mtdcri(SDR0, PESDR1_460EX_PHY_CTL_RST,0x10000000); |
| 901 | break; |
| 902 | } |
| 903 | |
| 904 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, |
| 905 | mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | |
| 906 | (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN)); |
| 907 | |
| 908 | /* Poll for PHY reset */ |
| 909 | /* XXX FIXME add timeout */ |
| 910 | switch (port->index) { |
| 911 | case 0: |
| 912 | while (!(mfdcri(SDR0, PESDR0_460EX_RSTSTA) & 0x1)) |
| 913 | udelay(10); |
| 914 | break; |
| 915 | case 1: |
| 916 | while (!(mfdcri(SDR0, PESDR1_460EX_RSTSTA) & 0x1)) |
| 917 | udelay(10); |
| 918 | break; |
| 919 | } |
| 920 | |
| 921 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, |
| 922 | (mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) & |
| 923 | ~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) | |
| 924 | PESDRx_RCSSET_RSTPYN); |
| 925 | |
| 926 | port->has_ibpre = 1; |
| 927 | |
| 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | static int ppc460ex_pciex_init_utl(struct ppc4xx_pciex_port *port) |
| 932 | { |
| 933 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0); |
| 934 | |
| 935 | /* |
| 936 | * Set buffer allocations and then assert VRB and TXE. |
| 937 | */ |
| 938 | out_be32(port->utl_base + PEUTL_PBCTL, 0x0800000c); |
| 939 | out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); |
| 940 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); |
| 941 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000); |
| 942 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x00000000); |
| 943 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000); |
| 944 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000); |
| 945 | out_be32(port->utl_base + PEUTL_RCIRQEN,0x00f00000); |
| 946 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); |
| 947 | |
| 948 | return 0; |
| 949 | } |
| 950 | |
| 951 | static struct ppc4xx_pciex_hwops ppc460ex_pcie_hwops __initdata = |
| 952 | { |
| 953 | .core_init = ppc460ex_pciex_core_init, |
| 954 | .port_init_hw = ppc460ex_pciex_init_port_hw, |
| 955 | .setup_utl = ppc460ex_pciex_init_utl, |
| 956 | }; |
| 957 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 958 | #endif /* CONFIG_44x */ |
| 959 | |
| 960 | #ifdef CONFIG_40x |
| 961 | |
| 962 | static int __init ppc405ex_pciex_core_init(struct device_node *np) |
| 963 | { |
| 964 | /* Nothing to do, return 2 ports */ |
| 965 | return 2; |
| 966 | } |
| 967 | |
| 968 | static void ppc405ex_pcie_phy_reset(struct ppc4xx_pciex_port *port) |
| 969 | { |
| 970 | /* Assert the PE0_PHY reset */ |
| 971 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01010000); |
| 972 | msleep(1); |
| 973 | |
| 974 | /* deassert the PE0_hotreset */ |
| 975 | if (port->endpoint) |
| 976 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01111000); |
| 977 | else |
| 978 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01101000); |
| 979 | |
| 980 | /* poll for phy !reset */ |
| 981 | /* XXX FIXME add timeout */ |
| 982 | while (!(mfdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSTA) & 0x00001000)) |
| 983 | ; |
| 984 | |
| 985 | /* deassert the PE0_gpl_utl_reset */ |
| 986 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x00101000); |
| 987 | } |
| 988 | |
| 989 | static int ppc405ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
| 990 | { |
| 991 | u32 val; |
| 992 | |
| 993 | if (port->endpoint) |
| 994 | val = PTYPE_LEGACY_ENDPOINT; |
| 995 | else |
| 996 | val = PTYPE_ROOT_PORT; |
| 997 | |
| 998 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, |
| 999 | 1 << 24 | val << 20 | LNKW_X1 << 12); |
| 1000 | |
| 1001 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000); |
| 1002 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000); |
| 1003 | mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET1, 0x720F0000); |
| 1004 | mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET2, 0x70600003); |
| 1005 | |
| 1006 | /* |
| 1007 | * Only reset the PHY when no link is currently established. |
| 1008 | * This is for the Atheros PCIe board which has problems to establish |
| 1009 | * the link (again) after this PHY reset. All other currently tested |
| 1010 | * PCIe boards don't show this problem. |
| 1011 | * This has to be re-tested and fixed in a later release! |
| 1012 | */ |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1013 | val = mfdcri(SDR0, port->sdr_base + PESDRn_LOOP); |
| 1014 | if (!(val & 0x00001000)) |
| 1015 | ppc405ex_pcie_phy_reset(port); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1016 | |
| 1017 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000); /* guarded on */ |
| 1018 | |
Stefan Roese | 55aaf6e | 2007-12-07 20:34:34 +1100 | [diff] [blame] | 1019 | port->has_ibpre = 1; |
| 1020 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1021 | return 0; |
| 1022 | } |
| 1023 | |
| 1024 | static int ppc405ex_pciex_init_utl(struct ppc4xx_pciex_port *port) |
| 1025 | { |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1026 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0); |
| 1027 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1028 | /* |
| 1029 | * Set buffer allocations and then assert VRB and TXE. |
| 1030 | */ |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1031 | out_be32(port->utl_base + PEUTL_OUTTR, 0x02000000); |
| 1032 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); |
| 1033 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000); |
| 1034 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x21000000); |
| 1035 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000); |
| 1036 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000); |
| 1037 | out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000); |
| 1038 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1039 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1040 | out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1041 | |
| 1042 | return 0; |
| 1043 | } |
| 1044 | |
| 1045 | static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata = |
| 1046 | { |
| 1047 | .core_init = ppc405ex_pciex_core_init, |
| 1048 | .port_init_hw = ppc405ex_pciex_init_port_hw, |
| 1049 | .setup_utl = ppc405ex_pciex_init_utl, |
| 1050 | }; |
| 1051 | |
| 1052 | #endif /* CONFIG_40x */ |
| 1053 | |
| 1054 | |
| 1055 | /* Check that the core has been initied and if not, do it */ |
| 1056 | static int __init ppc4xx_pciex_check_core_init(struct device_node *np) |
| 1057 | { |
| 1058 | static int core_init; |
| 1059 | int count = -ENODEV; |
| 1060 | |
| 1061 | if (core_init++) |
| 1062 | return 0; |
| 1063 | |
| 1064 | #ifdef CONFIG_44x |
Stefan Roese | accf5ef | 2007-12-21 15:39:38 +1100 | [diff] [blame] | 1065 | if (of_device_is_compatible(np, "ibm,plb-pciex-440spe")) { |
| 1066 | if (ppc440spe_revA()) |
| 1067 | ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops; |
| 1068 | else |
| 1069 | ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops; |
| 1070 | } |
Stefan Roese | 66b7e50 | 2008-02-24 08:08:27 +1100 | [diff] [blame] | 1071 | if (of_device_is_compatible(np, "ibm,plb-pciex-460ex")) |
| 1072 | ppc4xx_pciex_hwops = &ppc460ex_pcie_hwops; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1073 | #endif /* CONFIG_44x */ |
| 1074 | #ifdef CONFIG_40x |
| 1075 | if (of_device_is_compatible(np, "ibm,plb-pciex-405ex")) |
| 1076 | ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops; |
| 1077 | #endif |
| 1078 | if (ppc4xx_pciex_hwops == NULL) { |
| 1079 | printk(KERN_WARNING "PCIE: unknown host type %s\n", |
| 1080 | np->full_name); |
| 1081 | return -ENODEV; |
| 1082 | } |
| 1083 | |
| 1084 | count = ppc4xx_pciex_hwops->core_init(np); |
| 1085 | if (count > 0) { |
| 1086 | ppc4xx_pciex_ports = |
| 1087 | kzalloc(count * sizeof(struct ppc4xx_pciex_port), |
| 1088 | GFP_KERNEL); |
| 1089 | if (ppc4xx_pciex_ports) { |
| 1090 | ppc4xx_pciex_port_count = count; |
| 1091 | return 0; |
| 1092 | } |
| 1093 | printk(KERN_WARNING "PCIE: failed to allocate ports array\n"); |
| 1094 | return -ENOMEM; |
| 1095 | } |
| 1096 | return -ENODEV; |
| 1097 | } |
| 1098 | |
| 1099 | static void __init ppc4xx_pciex_port_init_mapping(struct ppc4xx_pciex_port *port) |
| 1100 | { |
| 1101 | /* We map PCI Express configuration based on the reg property */ |
| 1102 | dcr_write(port->dcrs, DCRO_PEGPL_CFGBAH, |
| 1103 | RES_TO_U32_HIGH(port->cfg_space.start)); |
| 1104 | dcr_write(port->dcrs, DCRO_PEGPL_CFGBAL, |
| 1105 | RES_TO_U32_LOW(port->cfg_space.start)); |
| 1106 | |
| 1107 | /* XXX FIXME: Use size from reg property. For now, map 512M */ |
| 1108 | dcr_write(port->dcrs, DCRO_PEGPL_CFGMSK, 0xe0000001); |
| 1109 | |
| 1110 | /* We map UTL registers based on the reg property */ |
| 1111 | dcr_write(port->dcrs, DCRO_PEGPL_REGBAH, |
| 1112 | RES_TO_U32_HIGH(port->utl_regs.start)); |
| 1113 | dcr_write(port->dcrs, DCRO_PEGPL_REGBAL, |
| 1114 | RES_TO_U32_LOW(port->utl_regs.start)); |
| 1115 | |
| 1116 | /* XXX FIXME: Use size from reg property */ |
| 1117 | dcr_write(port->dcrs, DCRO_PEGPL_REGMSK, 0x00007001); |
| 1118 | |
| 1119 | /* Disable all other outbound windows */ |
| 1120 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 0); |
| 1121 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, 0); |
| 1122 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0); |
| 1123 | dcr_write(port->dcrs, DCRO_PEGPL_MSGMSK, 0); |
| 1124 | } |
| 1125 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1126 | static int __init ppc4xx_pciex_wait_on_sdr(struct ppc4xx_pciex_port *port, |
| 1127 | unsigned int sdr_offset, |
| 1128 | unsigned int mask, |
| 1129 | unsigned int value, |
| 1130 | int timeout_ms) |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1131 | { |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1132 | u32 val; |
| 1133 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1134 | while(timeout_ms--) { |
| 1135 | val = mfdcri(SDR0, port->sdr_base + sdr_offset); |
| 1136 | if ((val & mask) == value) { |
| 1137 | pr_debug("PCIE%d: Wait on SDR %x success with tm %d (%08x)\n", |
| 1138 | port->index, sdr_offset, timeout_ms, val); |
| 1139 | return 0; |
| 1140 | } |
| 1141 | msleep(1); |
| 1142 | } |
| 1143 | return -1; |
| 1144 | } |
| 1145 | |
| 1146 | static int __init ppc4xx_pciex_port_init(struct ppc4xx_pciex_port *port) |
| 1147 | { |
| 1148 | int rc = 0; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1149 | |
| 1150 | /* Init HW */ |
| 1151 | if (ppc4xx_pciex_hwops->port_init_hw) |
| 1152 | rc = ppc4xx_pciex_hwops->port_init_hw(port); |
| 1153 | if (rc != 0) |
| 1154 | return rc; |
| 1155 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1156 | printk(KERN_INFO "PCIE%d: Checking link...\n", |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1157 | port->index); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1158 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1159 | /* Wait for reset to complete */ |
| 1160 | if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 20, 0, 10)) { |
| 1161 | printk(KERN_WARNING "PCIE%d: PGRST failed\n", |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1162 | port->index); |
| 1163 | return -1; |
| 1164 | } |
| 1165 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1166 | /* Check for card presence detect if supported, if not, just wait for |
| 1167 | * link unconditionally. |
| 1168 | * |
| 1169 | * note that we don't fail if there is no link, we just filter out |
| 1170 | * config space accesses. That way, it will be easier to implement |
| 1171 | * hotplug later on. |
| 1172 | */ |
| 1173 | if (!port->has_ibpre || |
| 1174 | !ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, |
| 1175 | 1 << 28, 1 << 28, 100)) { |
| 1176 | printk(KERN_INFO |
| 1177 | "PCIE%d: Device detected, waiting for link...\n", |
| 1178 | port->index); |
| 1179 | if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, |
| 1180 | 0x1000, 0x1000, 2000)) |
| 1181 | printk(KERN_WARNING |
| 1182 | "PCIE%d: Link up failed\n", port->index); |
| 1183 | else { |
| 1184 | printk(KERN_INFO |
| 1185 | "PCIE%d: link is up !\n", port->index); |
| 1186 | port->link = 1; |
| 1187 | } |
| 1188 | } else |
| 1189 | printk(KERN_INFO "PCIE%d: No device detected.\n", port->index); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1190 | |
| 1191 | /* |
| 1192 | * Initialize mapping: disable all regions and configure |
| 1193 | * CFG and REG regions based on resources in the device tree |
| 1194 | */ |
| 1195 | ppc4xx_pciex_port_init_mapping(port); |
| 1196 | |
| 1197 | /* |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1198 | * Map UTL |
| 1199 | */ |
| 1200 | port->utl_base = ioremap(port->utl_regs.start, 0x100); |
| 1201 | BUG_ON(port->utl_base == NULL); |
| 1202 | |
| 1203 | /* |
| 1204 | * Setup UTL registers --BenH. |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1205 | */ |
| 1206 | if (ppc4xx_pciex_hwops->setup_utl) |
| 1207 | ppc4xx_pciex_hwops->setup_utl(port); |
| 1208 | |
| 1209 | /* |
| 1210 | * Check for VC0 active and assert RDY. |
| 1211 | */ |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1212 | if (port->link && |
| 1213 | ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, |
| 1214 | 1 << 16, 1 << 16, 5000)) { |
| 1215 | printk(KERN_INFO "PCIE%d: VC0 not active\n", port->index); |
| 1216 | port->link = 0; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1217 | } |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1218 | |
Valentine Barshak | 6e42b21 | 2008-03-07 01:34:52 +1100 | [diff] [blame] | 1219 | dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, 0, 1 << 20); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1220 | msleep(100); |
| 1221 | |
| 1222 | return 0; |
| 1223 | } |
| 1224 | |
| 1225 | static int ppc4xx_pciex_validate_bdf(struct ppc4xx_pciex_port *port, |
| 1226 | struct pci_bus *bus, |
| 1227 | unsigned int devfn) |
| 1228 | { |
| 1229 | static int message; |
| 1230 | |
| 1231 | /* Endpoint can not generate upstream(remote) config cycles */ |
| 1232 | if (port->endpoint && bus->number != port->hose->first_busno) |
| 1233 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 1234 | |
| 1235 | /* Check we are within the mapped range */ |
| 1236 | if (bus->number > port->hose->last_busno) { |
| 1237 | if (!message) { |
| 1238 | printk(KERN_WARNING "Warning! Probing bus %u" |
| 1239 | " out of range !\n", bus->number); |
| 1240 | message++; |
| 1241 | } |
| 1242 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 1243 | } |
| 1244 | |
| 1245 | /* The root complex has only one device / function */ |
| 1246 | if (bus->number == port->hose->first_busno && devfn != 0) |
| 1247 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 1248 | |
| 1249 | /* The other side of the RC has only one device as well */ |
| 1250 | if (bus->number == (port->hose->first_busno + 1) && |
| 1251 | PCI_SLOT(devfn) != 0) |
| 1252 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 1253 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1254 | /* Check if we have a link */ |
| 1255 | if ((bus->number != port->hose->first_busno) && !port->link) |
| 1256 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 1257 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1258 | return 0; |
| 1259 | } |
| 1260 | |
| 1261 | static void __iomem *ppc4xx_pciex_get_config_base(struct ppc4xx_pciex_port *port, |
| 1262 | struct pci_bus *bus, |
| 1263 | unsigned int devfn) |
| 1264 | { |
| 1265 | int relbus; |
| 1266 | |
| 1267 | /* Remove the casts when we finally remove the stupid volatile |
| 1268 | * in struct pci_controller |
| 1269 | */ |
| 1270 | if (bus->number == port->hose->first_busno) |
| 1271 | return (void __iomem *)port->hose->cfg_addr; |
| 1272 | |
| 1273 | relbus = bus->number - (port->hose->first_busno + 1); |
| 1274 | return (void __iomem *)port->hose->cfg_data + |
| 1275 | ((relbus << 20) | (devfn << 12)); |
| 1276 | } |
| 1277 | |
| 1278 | static int ppc4xx_pciex_read_config(struct pci_bus *bus, unsigned int devfn, |
| 1279 | int offset, int len, u32 *val) |
| 1280 | { |
| 1281 | struct pci_controller *hose = (struct pci_controller *) bus->sysdata; |
| 1282 | struct ppc4xx_pciex_port *port = |
| 1283 | &ppc4xx_pciex_ports[hose->indirect_type]; |
| 1284 | void __iomem *addr; |
| 1285 | u32 gpl_cfg; |
| 1286 | |
| 1287 | BUG_ON(hose != port->hose); |
| 1288 | |
| 1289 | if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) |
| 1290 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 1291 | |
| 1292 | addr = ppc4xx_pciex_get_config_base(port, bus, devfn); |
| 1293 | |
| 1294 | /* |
| 1295 | * Reading from configuration space of non-existing device can |
| 1296 | * generate transaction errors. For the read duration we suppress |
| 1297 | * assertion of machine check exceptions to avoid those. |
| 1298 | */ |
| 1299 | gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); |
| 1300 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); |
| 1301 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1302 | /* Make sure no CRS is recorded */ |
| 1303 | out_be32(port->utl_base + PEUTL_RCSTA, 0x00040000); |
| 1304 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1305 | switch (len) { |
| 1306 | case 1: |
| 1307 | *val = in_8((u8 *)(addr + offset)); |
| 1308 | break; |
| 1309 | case 2: |
| 1310 | *val = in_le16((u16 *)(addr + offset)); |
| 1311 | break; |
| 1312 | default: |
| 1313 | *val = in_le32((u32 *)(addr + offset)); |
| 1314 | break; |
| 1315 | } |
| 1316 | |
| 1317 | pr_debug("pcie-config-read: bus=%3d [%3d..%3d] devfn=0x%04x" |
| 1318 | " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", |
| 1319 | bus->number, hose->first_busno, hose->last_busno, |
| 1320 | devfn, offset, len, addr + offset, *val); |
| 1321 | |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1322 | /* Check for CRS (440SPe rev B does that for us but heh ..) */ |
| 1323 | if (in_be32(port->utl_base + PEUTL_RCSTA) & 0x00040000) { |
| 1324 | pr_debug("Got CRS !\n"); |
| 1325 | if (len != 4 || offset != 0) |
| 1326 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 1327 | *val = 0xffff0001; |
| 1328 | } |
| 1329 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1330 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); |
| 1331 | |
| 1332 | return PCIBIOS_SUCCESSFUL; |
| 1333 | } |
| 1334 | |
| 1335 | static int ppc4xx_pciex_write_config(struct pci_bus *bus, unsigned int devfn, |
| 1336 | int offset, int len, u32 val) |
| 1337 | { |
| 1338 | struct pci_controller *hose = (struct pci_controller *) bus->sysdata; |
| 1339 | struct ppc4xx_pciex_port *port = |
| 1340 | &ppc4xx_pciex_ports[hose->indirect_type]; |
| 1341 | void __iomem *addr; |
| 1342 | u32 gpl_cfg; |
| 1343 | |
| 1344 | if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) |
| 1345 | return PCIBIOS_DEVICE_NOT_FOUND; |
| 1346 | |
| 1347 | addr = ppc4xx_pciex_get_config_base(port, bus, devfn); |
| 1348 | |
| 1349 | /* |
| 1350 | * Reading from configuration space of non-existing device can |
| 1351 | * generate transaction errors. For the read duration we suppress |
| 1352 | * assertion of machine check exceptions to avoid those. |
| 1353 | */ |
| 1354 | gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); |
| 1355 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); |
| 1356 | |
| 1357 | pr_debug("pcie-config-write: bus=%3d [%3d..%3d] devfn=0x%04x" |
| 1358 | " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", |
| 1359 | bus->number, hose->first_busno, hose->last_busno, |
| 1360 | devfn, offset, len, addr + offset, val); |
| 1361 | |
| 1362 | switch (len) { |
| 1363 | case 1: |
| 1364 | out_8((u8 *)(addr + offset), val); |
| 1365 | break; |
| 1366 | case 2: |
| 1367 | out_le16((u16 *)(addr + offset), val); |
| 1368 | break; |
| 1369 | default: |
| 1370 | out_le32((u32 *)(addr + offset), val); |
| 1371 | break; |
| 1372 | } |
| 1373 | |
| 1374 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); |
| 1375 | |
| 1376 | return PCIBIOS_SUCCESSFUL; |
| 1377 | } |
| 1378 | |
| 1379 | static struct pci_ops ppc4xx_pciex_pci_ops = |
| 1380 | { |
| 1381 | .read = ppc4xx_pciex_read_config, |
| 1382 | .write = ppc4xx_pciex_write_config, |
| 1383 | }; |
| 1384 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 1385 | static int __init ppc4xx_setup_one_pciex_POM(struct ppc4xx_pciex_port *port, |
| 1386 | struct pci_controller *hose, |
| 1387 | void __iomem *mbase, |
| 1388 | u64 plb_addr, |
| 1389 | u64 pci_addr, |
| 1390 | u64 size, |
| 1391 | unsigned int flags, |
| 1392 | int index) |
| 1393 | { |
| 1394 | u32 lah, lal, pciah, pcial, sa; |
| 1395 | |
| 1396 | if (!is_power_of_2(size) || |
| 1397 | (index < 2 && size < 0x100000) || |
| 1398 | (index == 2 && size < 0x100) || |
| 1399 | (plb_addr & (size - 1)) != 0) { |
| 1400 | printk(KERN_WARNING "%s: Resource out of range\n", |
| 1401 | hose->dn->full_name); |
| 1402 | return -1; |
| 1403 | } |
| 1404 | |
| 1405 | /* Calculate register values */ |
| 1406 | lah = RES_TO_U32_HIGH(plb_addr); |
| 1407 | lal = RES_TO_U32_LOW(plb_addr); |
| 1408 | pciah = RES_TO_U32_HIGH(pci_addr); |
| 1409 | pcial = RES_TO_U32_LOW(pci_addr); |
| 1410 | sa = (0xffffffffu << ilog2(size)) | 0x1; |
| 1411 | |
| 1412 | /* Program register values */ |
| 1413 | switch (index) { |
| 1414 | case 0: |
| 1415 | out_le32(mbase + PECFG_POM0LAH, pciah); |
| 1416 | out_le32(mbase + PECFG_POM0LAL, pcial); |
| 1417 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAH, lah); |
| 1418 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAL, lal); |
| 1419 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKH, 0x7fffffff); |
| 1420 | /* Note that 3 here means enabled | single region */ |
| 1421 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, sa | 3); |
| 1422 | break; |
| 1423 | case 1: |
| 1424 | out_le32(mbase + PECFG_POM1LAH, pciah); |
| 1425 | out_le32(mbase + PECFG_POM1LAL, pcial); |
| 1426 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAH, lah); |
| 1427 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAL, lal); |
| 1428 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKH, 0x7fffffff); |
| 1429 | /* Note that 3 here means enabled | single region */ |
| 1430 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, sa | 3); |
| 1431 | break; |
| 1432 | case 2: |
| 1433 | out_le32(mbase + PECFG_POM2LAH, pciah); |
| 1434 | out_le32(mbase + PECFG_POM2LAL, pcial); |
| 1435 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAH, lah); |
| 1436 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAL, lal); |
| 1437 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKH, 0x7fffffff); |
| 1438 | /* Note that 3 here means enabled | IO space !!! */ |
| 1439 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, sa | 3); |
| 1440 | break; |
| 1441 | } |
| 1442 | |
| 1443 | return 0; |
| 1444 | } |
| 1445 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1446 | static void __init ppc4xx_configure_pciex_POMs(struct ppc4xx_pciex_port *port, |
| 1447 | struct pci_controller *hose, |
| 1448 | void __iomem *mbase) |
| 1449 | { |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 1450 | int i, j, found_isa_hole = 0; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1451 | |
| 1452 | /* Setup outbound memory windows */ |
| 1453 | for (i = j = 0; i < 3; i++) { |
| 1454 | struct resource *res = &hose->mem_resources[i]; |
| 1455 | |
| 1456 | /* we only care about memory windows */ |
| 1457 | if (!(res->flags & IORESOURCE_MEM)) |
| 1458 | continue; |
| 1459 | if (j > 1) { |
| 1460 | printk(KERN_WARNING "%s: Too many ranges\n", |
| 1461 | port->node->full_name); |
| 1462 | break; |
| 1463 | } |
| 1464 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 1465 | /* Configure the resource */ |
| 1466 | if (ppc4xx_setup_one_pciex_POM(port, hose, mbase, |
| 1467 | res->start, |
| 1468 | res->start - hose->pci_mem_offset, |
| 1469 | res->end + 1 - res->start, |
| 1470 | res->flags, |
| 1471 | j) == 0) { |
| 1472 | j++; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1473 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 1474 | /* If the resource PCI address is 0 then we have our |
| 1475 | * ISA memory hole |
| 1476 | */ |
| 1477 | if (res->start == hose->pci_mem_offset) |
| 1478 | found_isa_hole = 1; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1479 | } |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1480 | } |
| 1481 | |
Benjamin Herrenschmidt | 84d727a | 2008-10-09 16:58:19 +0000 | [diff] [blame^] | 1482 | /* Handle ISA memory hole if not already covered */ |
| 1483 | if (j <= 1 && !found_isa_hole && hose->isa_mem_size) |
| 1484 | if (ppc4xx_setup_one_pciex_POM(port, hose, mbase, |
| 1485 | hose->isa_mem_phys, 0, |
| 1486 | hose->isa_mem_size, 0, j) == 0) |
| 1487 | printk(KERN_INFO "%s: Legacy ISA memory support enabled\n", |
| 1488 | hose->dn->full_name); |
| 1489 | |
| 1490 | /* Configure IO, always 64K starting at 0. We hard wire it to 64K ! |
| 1491 | * Note also that it -has- to be region index 2 on this HW |
| 1492 | */ |
| 1493 | if (hose->io_resource.flags & IORESOURCE_IO) |
| 1494 | ppc4xx_setup_one_pciex_POM(port, hose, mbase, |
| 1495 | hose->io_base_phys, 0, |
| 1496 | 0x10000, IORESOURCE_IO, 2); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1497 | } |
| 1498 | |
| 1499 | static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port, |
| 1500 | struct pci_controller *hose, |
| 1501 | void __iomem *mbase, |
| 1502 | struct resource *res) |
| 1503 | { |
| 1504 | resource_size_t size = res->end - res->start + 1; |
| 1505 | u64 sa; |
| 1506 | |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1507 | if (port->endpoint) { |
| 1508 | resource_size_t ep_addr = 0; |
| 1509 | resource_size_t ep_size = 32 << 20; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1510 | |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1511 | /* Currently we map a fixed 64MByte window to PLB address |
| 1512 | * 0 (SDRAM). This should probably be configurable via a dts |
| 1513 | * property. |
| 1514 | */ |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1515 | |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1516 | /* Calculate window size */ |
| 1517 | sa = (0xffffffffffffffffull << ilog2(ep_size));; |
| 1518 | |
| 1519 | /* Setup BAR0 */ |
| 1520 | out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); |
| 1521 | out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa) | |
| 1522 | PCI_BASE_ADDRESS_MEM_TYPE_64); |
| 1523 | |
| 1524 | /* Disable BAR1 & BAR2 */ |
| 1525 | out_le32(mbase + PECFG_BAR1MPA, 0); |
| 1526 | out_le32(mbase + PECFG_BAR2HMPA, 0); |
| 1527 | out_le32(mbase + PECFG_BAR2LMPA, 0); |
| 1528 | |
| 1529 | out_le32(mbase + PECFG_PIM01SAH, RES_TO_U32_HIGH(sa)); |
| 1530 | out_le32(mbase + PECFG_PIM01SAL, RES_TO_U32_LOW(sa)); |
| 1531 | |
| 1532 | out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(ep_addr)); |
| 1533 | out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(ep_addr)); |
| 1534 | } else { |
| 1535 | /* Calculate window size */ |
| 1536 | sa = (0xffffffffffffffffull << ilog2(size));; |
| 1537 | if (res->flags & IORESOURCE_PREFETCH) |
| 1538 | sa |= 0x8; |
| 1539 | |
| 1540 | out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); |
| 1541 | out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa)); |
| 1542 | |
| 1543 | /* The setup of the split looks weird to me ... let's see |
| 1544 | * if it works |
| 1545 | */ |
| 1546 | out_le32(mbase + PECFG_PIM0LAL, 0x00000000); |
| 1547 | out_le32(mbase + PECFG_PIM0LAH, 0x00000000); |
| 1548 | out_le32(mbase + PECFG_PIM1LAL, 0x00000000); |
| 1549 | out_le32(mbase + PECFG_PIM1LAH, 0x00000000); |
| 1550 | out_le32(mbase + PECFG_PIM01SAH, 0xffff0000); |
| 1551 | out_le32(mbase + PECFG_PIM01SAL, 0x00000000); |
| 1552 | |
| 1553 | out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(res->start)); |
| 1554 | out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(res->start)); |
| 1555 | } |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1556 | |
| 1557 | /* Enable inbound mapping */ |
| 1558 | out_le32(mbase + PECFG_PIMEN, 0x1); |
| 1559 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1560 | /* Enable I/O, Mem, and Busmaster cycles */ |
| 1561 | out_le16(mbase + PCI_COMMAND, |
| 1562 | in_le16(mbase + PCI_COMMAND) | |
| 1563 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); |
| 1564 | } |
| 1565 | |
| 1566 | static void __init ppc4xx_pciex_port_setup_hose(struct ppc4xx_pciex_port *port) |
| 1567 | { |
| 1568 | struct resource dma_window; |
| 1569 | struct pci_controller *hose = NULL; |
| 1570 | const int *bus_range; |
| 1571 | int primary = 0, busses; |
| 1572 | void __iomem *mbase = NULL, *cfg_data = NULL; |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1573 | const u32 *pval; |
| 1574 | u32 val; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1575 | |
| 1576 | /* Check if primary bridge */ |
| 1577 | if (of_get_property(port->node, "primary", NULL)) |
| 1578 | primary = 1; |
| 1579 | |
| 1580 | /* Get bus range if any */ |
| 1581 | bus_range = of_get_property(port->node, "bus-range", NULL); |
| 1582 | |
| 1583 | /* Allocate the host controller data structure */ |
| 1584 | hose = pcibios_alloc_controller(port->node); |
| 1585 | if (!hose) |
| 1586 | goto fail; |
| 1587 | |
| 1588 | /* We stick the port number in "indirect_type" so the config space |
| 1589 | * ops can retrieve the port data structure easily |
| 1590 | */ |
| 1591 | hose->indirect_type = port->index; |
| 1592 | |
| 1593 | /* Get bus range */ |
| 1594 | hose->first_busno = bus_range ? bus_range[0] : 0x0; |
| 1595 | hose->last_busno = bus_range ? bus_range[1] : 0xff; |
| 1596 | |
| 1597 | /* Because of how big mapping the config space is (1M per bus), we |
| 1598 | * limit how many busses we support. In the long run, we could replace |
| 1599 | * that with something akin to kmap_atomic instead. We set aside 1 bus |
| 1600 | * for the host itself too. |
| 1601 | */ |
| 1602 | busses = hose->last_busno - hose->first_busno; /* This is off by 1 */ |
| 1603 | if (busses > MAX_PCIE_BUS_MAPPED) { |
| 1604 | busses = MAX_PCIE_BUS_MAPPED; |
| 1605 | hose->last_busno = hose->first_busno + busses; |
| 1606 | } |
| 1607 | |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1608 | if (!port->endpoint) { |
| 1609 | /* Only map the external config space in cfg_data for |
| 1610 | * PCIe root-complexes. External space is 1M per bus |
| 1611 | */ |
| 1612 | cfg_data = ioremap(port->cfg_space.start + |
| 1613 | (hose->first_busno + 1) * 0x100000, |
| 1614 | busses * 0x100000); |
| 1615 | if (cfg_data == NULL) { |
| 1616 | printk(KERN_ERR "%s: Can't map external config space !", |
| 1617 | port->node->full_name); |
| 1618 | goto fail; |
| 1619 | } |
| 1620 | hose->cfg_data = cfg_data; |
| 1621 | } |
| 1622 | |
| 1623 | /* Always map the host config space in cfg_addr. |
| 1624 | * Internal space is 4K |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1625 | */ |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1626 | mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1627 | if (mbase == NULL) { |
| 1628 | printk(KERN_ERR "%s: Can't map internal config space !", |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1629 | port->node->full_name); |
| 1630 | goto fail; |
| 1631 | } |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1632 | hose->cfg_addr = mbase; |
| 1633 | |
| 1634 | pr_debug("PCIE %s, bus %d..%d\n", port->node->full_name, |
| 1635 | hose->first_busno, hose->last_busno); |
| 1636 | pr_debug(" config space mapped at: root @0x%p, other @0x%p\n", |
| 1637 | hose->cfg_addr, hose->cfg_data); |
| 1638 | |
| 1639 | /* Setup config space */ |
| 1640 | hose->ops = &ppc4xx_pciex_pci_ops; |
| 1641 | port->hose = hose; |
| 1642 | mbase = (void __iomem *)hose->cfg_addr; |
| 1643 | |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1644 | if (!port->endpoint) { |
| 1645 | /* |
| 1646 | * Set bus numbers on our root port |
| 1647 | */ |
| 1648 | out_8(mbase + PCI_PRIMARY_BUS, hose->first_busno); |
| 1649 | out_8(mbase + PCI_SECONDARY_BUS, hose->first_busno + 1); |
| 1650 | out_8(mbase + PCI_SUBORDINATE_BUS, hose->last_busno); |
| 1651 | } |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1652 | |
| 1653 | /* |
| 1654 | * OMRs are already reset, also disable PIMs |
| 1655 | */ |
| 1656 | out_le32(mbase + PECFG_PIMEN, 0); |
| 1657 | |
| 1658 | /* Parse outbound mapping resources */ |
| 1659 | pci_process_bridge_OF_ranges(hose, port->node, primary); |
| 1660 | |
| 1661 | /* Parse inbound mapping resources */ |
| 1662 | if (ppc4xx_parse_dma_ranges(hose, mbase, &dma_window) != 0) |
| 1663 | goto fail; |
| 1664 | |
| 1665 | /* Configure outbound ranges POMs */ |
| 1666 | ppc4xx_configure_pciex_POMs(port, hose, mbase); |
| 1667 | |
| 1668 | /* Configure inbound ranges PIMs */ |
| 1669 | ppc4xx_configure_pciex_PIMs(port, hose, mbase, &dma_window); |
| 1670 | |
| 1671 | /* The root complex doesn't show up if we don't set some vendor |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1672 | * and device IDs into it. The defaults below are the same bogus |
| 1673 | * one that the initial code in arch/ppc had. This can be |
| 1674 | * overwritten by setting the "vendor-id/device-id" properties |
| 1675 | * in the pciex node. |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1676 | */ |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1677 | |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1678 | /* Get the (optional) vendor-/device-id from the device-tree */ |
| 1679 | pval = of_get_property(port->node, "vendor-id", NULL); |
| 1680 | if (pval) { |
| 1681 | val = *pval; |
| 1682 | } else { |
| 1683 | if (!port->endpoint) |
| 1684 | val = 0xaaa0 + port->index; |
| 1685 | else |
| 1686 | val = 0xeee0 + port->index; |
| 1687 | } |
| 1688 | out_le16(mbase + 0x200, val); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1689 | |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1690 | pval = of_get_property(port->node, "device-id", NULL); |
| 1691 | if (pval) { |
| 1692 | val = *pval; |
| 1693 | } else { |
| 1694 | if (!port->endpoint) |
| 1695 | val = 0xbed0 + port->index; |
| 1696 | else |
| 1697 | val = 0xfed0 + port->index; |
| 1698 | } |
| 1699 | out_le16(mbase + 0x202, val); |
| 1700 | |
| 1701 | if (!port->endpoint) { |
| 1702 | /* Set Class Code to PCI-PCI bridge and Revision Id to 1 */ |
| 1703 | out_le32(mbase + 0x208, 0x06040001); |
| 1704 | |
| 1705 | printk(KERN_INFO "PCIE%d: successfully set as root-complex\n", |
| 1706 | port->index); |
| 1707 | } else { |
| 1708 | /* Set Class Code to Processor/PPC */ |
| 1709 | out_le32(mbase + 0x208, 0x0b200001); |
| 1710 | |
| 1711 | printk(KERN_INFO "PCIE%d: successfully set as endpoint\n", |
| 1712 | port->index); |
| 1713 | } |
| 1714 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1715 | return; |
| 1716 | fail: |
| 1717 | if (hose) |
| 1718 | pcibios_free_controller(hose); |
| 1719 | if (cfg_data) |
| 1720 | iounmap(cfg_data); |
| 1721 | if (mbase) |
| 1722 | iounmap(mbase); |
| 1723 | } |
| 1724 | |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 1725 | static void __init ppc4xx_probe_pciex_bridge(struct device_node *np) |
| 1726 | { |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1727 | struct ppc4xx_pciex_port *port; |
| 1728 | const u32 *pval; |
| 1729 | int portno; |
| 1730 | unsigned int dcrs; |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1731 | const char *val; |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1732 | |
| 1733 | /* First, proceed to core initialization as we assume there's |
| 1734 | * only one PCIe core in the system |
| 1735 | */ |
| 1736 | if (ppc4xx_pciex_check_core_init(np)) |
| 1737 | return; |
| 1738 | |
| 1739 | /* Get the port number from the device-tree */ |
| 1740 | pval = of_get_property(np, "port", NULL); |
| 1741 | if (pval == NULL) { |
| 1742 | printk(KERN_ERR "PCIE: Can't find port number for %s\n", |
| 1743 | np->full_name); |
| 1744 | return; |
| 1745 | } |
| 1746 | portno = *pval; |
| 1747 | if (portno >= ppc4xx_pciex_port_count) { |
| 1748 | printk(KERN_ERR "PCIE: port number out of range for %s\n", |
| 1749 | np->full_name); |
| 1750 | return; |
| 1751 | } |
| 1752 | port = &ppc4xx_pciex_ports[portno]; |
| 1753 | port->index = portno; |
Stefan Roese | 995ada8 | 2008-06-06 00:22:29 +1000 | [diff] [blame] | 1754 | |
| 1755 | /* |
| 1756 | * Check if device is enabled |
| 1757 | */ |
| 1758 | if (!of_device_is_available(np)) { |
| 1759 | printk(KERN_INFO "PCIE%d: Port disabled via device-tree\n", port->index); |
| 1760 | return; |
| 1761 | } |
| 1762 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1763 | port->node = of_node_get(np); |
| 1764 | pval = of_get_property(np, "sdr-base", NULL); |
| 1765 | if (pval == NULL) { |
| 1766 | printk(KERN_ERR "PCIE: missing sdr-base for %s\n", |
| 1767 | np->full_name); |
| 1768 | return; |
| 1769 | } |
| 1770 | port->sdr_base = *pval; |
| 1771 | |
Stefan Roese | 80daac3 | 2008-04-22 00:54:30 +1000 | [diff] [blame] | 1772 | /* Check if device_type property is set to "pci" or "pci-endpoint". |
| 1773 | * Resulting from this setup this PCIe port will be configured |
| 1774 | * as root-complex or as endpoint. |
| 1775 | */ |
| 1776 | val = of_get_property(port->node, "device_type", NULL); |
| 1777 | if (!strcmp(val, "pci-endpoint")) { |
| 1778 | port->endpoint = 1; |
| 1779 | } else if (!strcmp(val, "pci")) { |
| 1780 | port->endpoint = 0; |
| 1781 | } else { |
| 1782 | printk(KERN_ERR "PCIE: missing or incorrect device_type for %s\n", |
| 1783 | np->full_name); |
| 1784 | return; |
| 1785 | } |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1786 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1787 | /* Fetch config space registers address */ |
| 1788 | if (of_address_to_resource(np, 0, &port->cfg_space)) { |
| 1789 | printk(KERN_ERR "%s: Can't get PCI-E config space !", |
| 1790 | np->full_name); |
| 1791 | return; |
| 1792 | } |
| 1793 | /* Fetch host bridge internal registers address */ |
| 1794 | if (of_address_to_resource(np, 1, &port->utl_regs)) { |
| 1795 | printk(KERN_ERR "%s: Can't get UTL register base !", |
| 1796 | np->full_name); |
| 1797 | return; |
| 1798 | } |
| 1799 | |
| 1800 | /* Map DCRs */ |
| 1801 | dcrs = dcr_resource_start(np, 0); |
| 1802 | if (dcrs == 0) { |
| 1803 | printk(KERN_ERR "%s: Can't get DCR register base !", |
| 1804 | np->full_name); |
| 1805 | return; |
| 1806 | } |
| 1807 | port->dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0)); |
| 1808 | |
| 1809 | /* Initialize the port specific registers */ |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1810 | if (ppc4xx_pciex_port_init(port)) { |
| 1811 | printk(KERN_WARNING "PCIE%d: Port init failed\n", port->index); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1812 | return; |
Benjamin Herrenschmidt | 035ee42 | 2007-12-21 15:39:36 +1100 | [diff] [blame] | 1813 | } |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1814 | |
| 1815 | /* Setup the linux hose data structure */ |
| 1816 | ppc4xx_pciex_port_setup_hose(port); |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 1817 | } |
| 1818 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1819 | #endif /* CONFIG_PPC4xx_PCI_EXPRESS */ |
| 1820 | |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 1821 | static int __init ppc4xx_pci_find_bridges(void) |
| 1822 | { |
| 1823 | struct device_node *np; |
| 1824 | |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1825 | #ifdef CONFIG_PPC4xx_PCI_EXPRESS |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 1826 | for_each_compatible_node(np, NULL, "ibm,plb-pciex") |
| 1827 | ppc4xx_probe_pciex_bridge(np); |
Benjamin Herrenschmidt | a2d2e1e | 2007-12-21 15:39:24 +1100 | [diff] [blame] | 1828 | #endif |
Benjamin Herrenschmidt | 5738ec6 | 2007-12-21 15:39:22 +1100 | [diff] [blame] | 1829 | for_each_compatible_node(np, NULL, "ibm,plb-pcix") |
| 1830 | ppc4xx_probe_pcix_bridge(np); |
| 1831 | for_each_compatible_node(np, NULL, "ibm,plb-pci") |
| 1832 | ppc4xx_probe_pci_bridge(np); |
| 1833 | |
| 1834 | return 0; |
| 1835 | } |
| 1836 | arch_initcall(ppc4xx_pci_find_bridges); |
| 1837 | |