2 * MPC83xx/85xx/86xx PCI/PCIE support routing.
4 * Copyright 2007-2012 Freescale Semiconductor, Inc.
5 * Copyright 2008-2009 MontaVista Software, Inc.
9 * Rewrite the routing for Frescale PCI and PCI Express
11 * MPC83xx PCI-Express support:
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
20 #include <linux/kernel.h>
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23 #include <linux/string.h>
24 #include <linux/fsl/edac.h>
25 #include <linux/init.h>
26 #include <linux/interrupt.h>
27 #include <linux/memblock.h>
28 #include <linux/log2.h>
29 #include <linux/platform_device.h>
30 #include <linux/slab.h>
31 #include <linux/suspend.h>
32 #include <linux/syscore_ops.h>
33 #include <linux/uaccess.h>
37 #include <asm/pci-bridge.h>
38 #include <asm/ppc-pci.h>
39 #include <asm/machdep.h>
40 #include <asm/mpc85xx.h>
41 #include <asm/disassemble.h>
42 #include <asm/ppc-opcode.h>
43 #include <sysdev/fsl_soc.h>
44 #include <sysdev/fsl_pci.h>
46 static int fsl_pcie_bus_fixup, is_mpc83xx_pci;
48 static void quirk_fsl_pcie_early(struct pci_dev *dev)
52 /* if we aren't a PCIe don't bother */
53 if (!pci_is_pcie(dev))
56 /* if we aren't in host mode don't bother */
57 pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type);
58 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
61 dev->class = PCI_CLASS_BRIDGE_PCI << 8;
62 fsl_pcie_bus_fixup = 1;
66 static int fsl_indirect_read_config(struct pci_bus *, unsigned int,
69 static int fsl_pcie_check_link(struct pci_controller *hose)
73 if (hose->indirect_type & PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK) {
74 if (hose->ops->read == fsl_indirect_read_config)
75 __indirect_read_config(hose, hose->first_busno, 0,
78 early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
79 if (val < PCIE_LTSSM_L0)
82 struct ccsr_pci __iomem *pci = hose->private_data;
83 /* for PCIe IP rev 3.0 or greater use CSR0 for link state */
84 val = (in_be32(&pci->pex_csr0) & PEX_CSR0_LTSSM_MASK)
85 >> PEX_CSR0_LTSSM_SHIFT;
86 if (val != PEX_CSR0_LTSSM_L0)
93 static int fsl_indirect_read_config(struct pci_bus *bus, unsigned int devfn,
94 int offset, int len, u32 *val)
96 struct pci_controller *hose = pci_bus_to_host(bus);
98 if (fsl_pcie_check_link(hose))
99 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
101 hose->indirect_type &= ~PPC_INDIRECT_TYPE_NO_PCIE_LINK;
103 return indirect_read_config(bus, devfn, offset, len, val);
106 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
108 static struct pci_ops fsl_indirect_pcie_ops =
110 .read = fsl_indirect_read_config,
111 .write = indirect_write_config,
114 #define MAX_PHYS_ADDR_BITS 40
115 static u64 pci64_dma_offset = 1ull << MAX_PHYS_ADDR_BITS;
117 #ifdef CONFIG_SWIOTLB
118 static void setup_swiotlb_ops(struct pci_controller *hose)
120 if (ppc_swiotlb_enable) {
121 hose->controller_ops.dma_dev_setup = pci_dma_dev_setup_swiotlb;
122 set_pci_dma_ops(&swiotlb_dma_ops);
126 static inline void setup_swiotlb_ops(struct pci_controller *hose) {}
129 static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
131 if (!dev->dma_mask || !dma_supported(dev, dma_mask))
135 * Fixup PCI devices that are able to DMA to above the physical
136 * address width of the SoC such that we can address any internal
137 * SoC address from across PCI if needed
139 if ((dev_is_pci(dev)) &&
140 dma_mask >= DMA_BIT_MASK(MAX_PHYS_ADDR_BITS)) {
141 set_dma_ops(dev, &dma_direct_ops);
142 set_dma_offset(dev, pci64_dma_offset);
145 *dev->dma_mask = dma_mask;
149 static int setup_one_atmu(struct ccsr_pci __iomem *pci,
150 unsigned int index, const struct resource *res,
151 resource_size_t offset)
153 resource_size_t pci_addr = res->start - offset;
154 resource_size_t phys_addr = res->start;
155 resource_size_t size = resource_size(res);
156 u32 flags = 0x80044000; /* enable & mem R/W */
159 pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
160 (u64)res->start, (u64)size);
162 if (res->flags & IORESOURCE_PREFETCH)
163 flags |= 0x10000000; /* enable relaxed ordering */
165 for (i = 0; size > 0; i++) {
166 unsigned int bits = min_t(u32, ilog2(size),
167 __ffs(pci_addr | phys_addr));
172 out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
173 out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
174 out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
175 out_be32(&pci->pow[index + i].powar, flags | (bits - 1));
177 pci_addr += (resource_size_t)1U << bits;
178 phys_addr += (resource_size_t)1U << bits;
179 size -= (resource_size_t)1U << bits;
185 static bool is_kdump(void)
187 struct device_node *node;
189 node = of_find_node_by_type(NULL, "memory");
195 return of_property_read_bool(node, "linux,usable-memory");
198 /* atmu setup for fsl pci/pcie controller */
199 static void setup_pci_atmu(struct pci_controller *hose)
201 struct ccsr_pci __iomem *pci = hose->private_data;
202 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
203 u64 mem, sz, paddr_hi = 0;
204 u64 offset = 0, paddr_lo = ULLONG_MAX;
205 u32 pcicsrbar = 0, pcicsrbar_sz;
206 u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
207 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
208 const char *name = hose->dn->full_name;
214 * If this is kdump, we don't want to trigger a bunch of PCI
215 * errors by closing the window on in-flight DMA.
217 * We still run most of the function's logic so that things like
218 * hose->dma_window_size still get set.
220 setup_inbound = !is_kdump();
222 if (of_device_is_compatible(hose->dn, "fsl,bsc9132-pcie")) {
224 * BSC9132 Rev1.0 has an issue where all the PEX inbound
225 * windows have implemented the default target value as 0xf
226 * for CCSR space.In all Freescale legacy devices the target
227 * of 0xf is reserved for local memory space. 9132 Rev1.0
228 * now has local mempry space mapped to target 0x0 instead of
229 * 0xf. Hence adding a workaround to remove the target 0xf
230 * defined for memory space from Inbound window attributes.
232 piwar &= ~PIWAR_TGI_LOCAL;
235 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
236 if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) {
243 /* Disable all windows (except powar0 since it's ignored) */
244 for(i = 1; i < 5; i++)
245 out_be32(&pci->pow[i].powar, 0);
248 for (i = start_idx; i < end_idx; i++)
249 out_be32(&pci->piw[i].piwar, 0);
252 /* Setup outbound MEM window */
253 for(i = 0, j = 1; i < 3; i++) {
254 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
257 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
258 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
260 /* We assume all memory resources have the same offset */
261 offset = hose->mem_offset[i];
262 n = setup_one_atmu(pci, j, &hose->mem_resources[i], offset);
264 if (n < 0 || j >= 5) {
265 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
266 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
271 /* Setup outbound IO window */
272 if (hose->io_resource.flags & IORESOURCE_IO) {
274 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
276 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
277 "phy base 0x%016llx.\n",
278 (u64)hose->io_resource.start,
279 (u64)resource_size(&hose->io_resource),
280 (u64)hose->io_base_phys);
281 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
282 out_be32(&pci->pow[j].potear, 0);
283 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
285 out_be32(&pci->pow[j].powar, 0x80088000
286 | (ilog2(hose->io_resource.end
287 - hose->io_resource.start + 1) - 1));
291 /* convert to pci address space */
295 if (paddr_hi == paddr_lo) {
296 pr_err("%s: No outbound window space\n", name);
301 pr_err("%s: No space for inbound window\n", name);
305 /* setup PCSRBAR/PEXCSRBAR */
306 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
307 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
308 pcicsrbar_sz = ~pcicsrbar_sz + 1;
310 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
311 (paddr_lo > 0x100000000ull))
312 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
314 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
315 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
317 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
319 pr_info("%s: PCICSRBAR @ 0x%x\n", name, pcicsrbar);
321 /* Setup inbound mem window */
322 mem = memblock_end_of_DRAM();
323 pr_info("%s: end of DRAM %llx\n", __func__, mem);
326 * The msi-address-64 property, if it exists, indicates the physical
327 * address of the MSIIR register. Normally, this register is located
328 * inside CCSR, so the ATMU that covers all of CCSR is used. But if
329 * this property exists, then we normally need to create a new ATMU
330 * for it. For now, however, we cheat. The only entity that creates
331 * this property is the Freescale hypervisor, and the address is
332 * specified in the partition configuration. Typically, the address
333 * is located in the page immediately after the end of DDR. If so, we
334 * can avoid allocating a new ATMU by extending the DDR ATMU by one
337 reg = of_get_property(hose->dn, "msi-address-64", &len);
338 if (reg && (len == sizeof(u64))) {
339 u64 address = be64_to_cpup(reg);
341 if ((address >= mem) && (address < (mem + PAGE_SIZE))) {
342 pr_info("%s: extending DDR ATMU to cover MSIIR", name);
345 /* TODO: Create a new ATMU for MSIIR */
346 pr_warn("%s: msi-address-64 address of %llx is "
347 "unsupported\n", name, address);
351 sz = min(mem, paddr_lo);
354 /* PCIe can overmap inbound & outbound since RX & TX are separated */
355 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
356 /* Size window to exact size if power-of-two or one size up */
357 if ((1ull << mem_log) != mem) {
359 if ((1ull << mem_log) > mem)
360 pr_info("%s: Setting PCI inbound window "
361 "greater than memory size\n", name);
364 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
367 /* Setup inbound memory window */
368 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
369 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
370 out_be32(&pci->piw[win_idx].piwar, piwar);
374 hose->dma_window_base_cur = 0x00000000;
375 hose->dma_window_size = (resource_size_t)sz;
378 * if we have >4G of memory setup second PCI inbound window to
379 * let devices that are 64-bit address capable to work w/o
380 * SWIOTLB and access the full range of memory
383 mem_log = ilog2(mem);
385 /* Size window up if we dont fit in exact power-of-2 */
386 if ((1ull << mem_log) != mem)
389 piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
392 /* Setup inbound memory window */
393 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
394 out_be32(&pci->piw[win_idx].piwbear,
395 pci64_dma_offset >> 44);
396 out_be32(&pci->piw[win_idx].piwbar,
397 pci64_dma_offset >> 12);
398 out_be32(&pci->piw[win_idx].piwar, piwar);
402 * install our own dma_set_mask handler to fixup dma_ops
405 ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
407 pr_info("%s: Setup 64-bit PCI DMA window\n", name);
413 /* Setup inbound memory window */
414 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
415 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
416 out_be32(&pci->piw[win_idx].piwar,
417 (piwar | (mem_log - 1)));
421 paddr += 1ull << mem_log;
422 sz -= 1ull << mem_log;
426 piwar |= (mem_log - 1);
429 out_be32(&pci->piw[win_idx].pitar,
431 out_be32(&pci->piw[win_idx].piwbar,
433 out_be32(&pci->piw[win_idx].piwar, piwar);
437 paddr += 1ull << mem_log;
440 hose->dma_window_base_cur = 0x00000000;
441 hose->dma_window_size = (resource_size_t)paddr;
444 if (hose->dma_window_size < mem) {
445 #ifdef CONFIG_SWIOTLB
446 ppc_swiotlb_enable = 1;
448 pr_err("%s: ERROR: Memory size exceeds PCI ATMU ability to "
449 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
452 /* adjusting outbound windows could reclaim space in mem map */
453 if (paddr_hi < 0xffffffffull)
454 pr_warning("%s: WARNING: Outbound window cfg leaves "
455 "gaps in memory map. Adjusting the memory map "
456 "could reduce unnecessary bounce buffering.\n",
459 pr_info("%s: DMA window size is 0x%llx\n", name,
460 (u64)hose->dma_window_size);
464 static void __init setup_pci_cmd(struct pci_controller *hose)
469 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
470 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
472 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
474 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
476 int pci_x_cmd = cap_x + PCI_X_CMD;
477 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
478 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
479 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
481 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
485 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
487 struct pci_controller *hose = pci_bus_to_host(bus);
488 int i, is_pcie = 0, no_link;
490 /* The root complex bridge comes up with bogus resources,
491 * we copy the PHB ones in.
493 * With the current generic PCI code, the PHB bus no longer
494 * has bus->resource[0..4] set, so things are a bit more
498 if (fsl_pcie_bus_fixup)
499 is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
500 no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
502 if (bus->parent == hose->bus && (is_pcie || no_link)) {
503 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
504 struct resource *res = bus->resource[i];
505 struct resource *par;
510 par = &hose->io_resource;
512 par = &hose->mem_resources[i-1];
515 res->start = par ? par->start : 0;
516 res->end = par ? par->end : 0;
517 res->flags = par ? par->flags : 0;
522 int fsl_add_bridge(struct platform_device *pdev, int is_primary)
525 struct pci_controller *hose;
526 struct resource rsrc;
527 const int *bus_range;
529 struct device_node *dev;
530 struct ccsr_pci __iomem *pci;
532 u32 svr = mfspr(SPRN_SVR);
534 dev = pdev->dev.of_node;
536 if (!of_device_is_available(dev)) {
537 pr_warning("%s: disabled\n", dev->full_name);
541 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
543 /* Fetch host bridge registers address */
544 if (of_address_to_resource(dev, 0, &rsrc)) {
545 printk(KERN_WARNING "Can't get pci register base!");
549 /* Get bus range if any */
550 bus_range = of_get_property(dev, "bus-range", &len);
551 if (bus_range == NULL || len < 2 * sizeof(int))
552 printk(KERN_WARNING "Can't get bus-range for %s, assume"
553 " bus 0\n", dev->full_name);
555 pci_add_flags(PCI_REASSIGN_ALL_BUS);
556 hose = pcibios_alloc_controller(dev);
560 /* set platform device as the parent */
561 hose->parent = &pdev->dev;
562 hose->first_busno = bus_range ? bus_range[0] : 0x0;
563 hose->last_busno = bus_range ? bus_range[1] : 0xff;
565 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
566 (u64)rsrc.start, (u64)resource_size(&rsrc));
568 pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc));
569 if (!hose->private_data)
572 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
573 PPC_INDIRECT_TYPE_BIG_ENDIAN);
575 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0)
576 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
578 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
579 /* use fsl_indirect_read_config for PCIe */
580 hose->ops = &fsl_indirect_pcie_ops;
581 /* For PCIE read HEADER_TYPE to identify controller mode */
582 early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type);
583 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
587 /* For PCI read PROG to identify controller mode */
588 early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif);
590 !of_property_read_bool(dev, "fsl,pci-agent-force-enum"))
596 /* check PCI express link status */
597 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
598 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
599 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
600 if (fsl_pcie_check_link(hose))
601 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
604 * Set PBFR(PCI Bus Function Register)[10] = 1 to
605 * disable the combining of crossing cacheline
606 * boundary requests into one burst transaction.
607 * PCI-X operation is not affected.
608 * Fix erratum PCI 5 on MPC8548
610 #define PCI_BUS_FUNCTION 0x44
611 #define PCI_BUS_FUNCTION_MDS 0x400 /* Master disable streaming */
612 if (((SVR_SOC_VER(svr) == SVR_8543) ||
613 (SVR_SOC_VER(svr) == SVR_8545) ||
614 (SVR_SOC_VER(svr) == SVR_8547) ||
615 (SVR_SOC_VER(svr) == SVR_8548)) &&
616 !early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX)) {
617 early_read_config_word(hose, 0, 0,
618 PCI_BUS_FUNCTION, &temp);
619 temp |= PCI_BUS_FUNCTION_MDS;
620 early_write_config_word(hose, 0, 0,
621 PCI_BUS_FUNCTION, temp);
625 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
626 "Firmware bus number: %d->%d\n",
627 (unsigned long long)rsrc.start, hose->first_busno,
630 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
631 hose, hose->cfg_addr, hose->cfg_data);
633 /* Interpret the "ranges" property */
634 /* This also maps the I/O region and sets isa_io/mem_base */
635 pci_process_bridge_OF_ranges(hose, dev, is_primary);
637 /* Setup PEX window registers */
638 setup_pci_atmu(hose);
640 /* Set up controller operations */
641 setup_swiotlb_ops(hose);
646 iounmap(hose->private_data);
647 /* unmap cfg_data & cfg_addr separately if not on same page */
648 if (((unsigned long)hose->cfg_data & PAGE_MASK) !=
649 ((unsigned long)hose->cfg_addr & PAGE_MASK))
650 iounmap(hose->cfg_data);
651 iounmap(hose->cfg_addr);
652 pcibios_free_controller(hose);
655 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
657 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID,
658 quirk_fsl_pcie_early);
660 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
661 struct mpc83xx_pcie_priv {
662 void __iomem *cfg_type0;
663 void __iomem *cfg_type1;
667 struct pex_inbound_window {
675 * With the convention of u-boot, the PCIE outbound window 0 serves
676 * as configuration transactions outbound.
678 #define PEX_OUTWIN0_BAR 0xCA4
679 #define PEX_OUTWIN0_TAL 0xCA8
680 #define PEX_OUTWIN0_TAH 0xCAC
681 #define PEX_RC_INWIN_BASE 0xE60
682 #define PEX_RCIWARn_EN 0x1
684 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
686 struct pci_controller *hose = pci_bus_to_host(bus);
688 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
689 return PCIBIOS_DEVICE_NOT_FOUND;
691 * Workaround for the HW bug: for Type 0 configure transactions the
692 * PCI-E controller does not check the device number bits and just
693 * assumes that the device number bits are 0.
695 if (bus->number == hose->first_busno ||
696 bus->primary == hose->first_busno) {
698 return PCIBIOS_DEVICE_NOT_FOUND;
701 if (ppc_md.pci_exclude_device) {
702 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
703 return PCIBIOS_DEVICE_NOT_FOUND;
706 return PCIBIOS_SUCCESSFUL;
709 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
710 unsigned int devfn, int offset)
712 struct pci_controller *hose = pci_bus_to_host(bus);
713 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
714 u32 dev_base = bus->number << 24 | devfn << 16;
717 ret = mpc83xx_pcie_exclude_device(bus, devfn);
724 if (bus->number == hose->first_busno)
725 return pcie->cfg_type0 + offset;
727 if (pcie->dev_base == dev_base)
730 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
732 pcie->dev_base = dev_base;
734 return pcie->cfg_type1 + offset;
737 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
738 int offset, int len, u32 val)
740 struct pci_controller *hose = pci_bus_to_host(bus);
742 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
743 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
746 return pci_generic_config_write(bus, devfn, offset, len, val);
749 static struct pci_ops mpc83xx_pcie_ops = {
750 .map_bus = mpc83xx_pcie_remap_cfg,
751 .read = pci_generic_config_read,
752 .write = mpc83xx_pcie_write_config,
755 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
756 struct resource *reg)
758 struct mpc83xx_pcie_priv *pcie;
762 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
766 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
767 if (!pcie->cfg_type0)
770 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
772 /* PCI-E isn't configured. */
777 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
778 if (!pcie->cfg_type1)
781 WARN_ON(hose->dn->data);
782 hose->dn->data = pcie;
783 hose->ops = &mpc83xx_pcie_ops;
784 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
786 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
787 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
789 if (fsl_pcie_check_link(hose))
790 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
794 iounmap(pcie->cfg_type0);
801 int __init mpc83xx_add_bridge(struct device_node *dev)
805 struct pci_controller *hose;
806 struct resource rsrc_reg;
807 struct resource rsrc_cfg;
808 const int *bus_range;
813 if (!of_device_is_available(dev)) {
814 pr_warning("%s: disabled by the firmware.\n",
818 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
820 /* Fetch host bridge registers address */
821 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
822 printk(KERN_WARNING "Can't get pci register base!\n");
826 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
828 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
830 "No pci config register base in dev tree, "
833 * MPC83xx supports up to two host controllers
834 * one at 0x8500 has config space registers at 0x8300
835 * one at 0x8600 has config space registers at 0x8380
837 if ((rsrc_reg.start & 0xfffff) == 0x8500)
838 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
839 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
840 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
843 * Controller at offset 0x8500 is primary
845 if ((rsrc_reg.start & 0xfffff) == 0x8500)
850 /* Get bus range if any */
851 bus_range = of_get_property(dev, "bus-range", &len);
852 if (bus_range == NULL || len < 2 * sizeof(int)) {
853 printk(KERN_WARNING "Can't get bus-range for %s, assume"
854 " bus 0\n", dev->full_name);
857 pci_add_flags(PCI_REASSIGN_ALL_BUS);
858 hose = pcibios_alloc_controller(dev);
862 hose->first_busno = bus_range ? bus_range[0] : 0;
863 hose->last_busno = bus_range ? bus_range[1] : 0xff;
865 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
866 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
870 setup_indirect_pci(hose, rsrc_cfg.start,
871 rsrc_cfg.start + 4, 0);
874 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
875 "Firmware bus number: %d->%d\n",
876 (unsigned long long)rsrc_reg.start, hose->first_busno,
879 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
880 hose, hose->cfg_addr, hose->cfg_data);
882 /* Interpret the "ranges" property */
883 /* This also maps the I/O region and sets isa_io/mem_base */
884 pci_process_bridge_OF_ranges(hose, dev, primary);
888 pcibios_free_controller(hose);
891 #endif /* CONFIG_PPC_83xx */
893 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
895 #ifdef CONFIG_PPC_83xx
896 if (is_mpc83xx_pci) {
897 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
898 struct pex_inbound_window *in;
901 /* Walk the Root Complex Inbound windows to match IMMR base */
902 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
903 for (i = 0; i < 4; i++) {
904 /* not enabled, skip */
905 if (!(in_le32(&in[i].ar) & PEX_RCIWARn_EN))
908 if (get_immrbase() == in_le32(&in[i].tar))
909 return (u64)in_le32(&in[i].barh) << 32 |
910 in_le32(&in[i].barl);
913 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
917 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
918 if (!is_mpc83xx_pci) {
921 pci_bus_read_config_dword(hose->bus,
922 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
925 * For PEXCSRBAR, bit 3-0 indicate prefetchable and
926 * address type. So when getting base address, these
927 * bits should be masked
929 base &= PCI_BASE_ADDRESS_MEM_MASK;
939 static int mcheck_handle_load(struct pt_regs *regs, u32 inst)
941 unsigned int rd, ra, rb, d;
948 switch (get_op(inst)) {
950 switch (get_xop(inst)) {
952 case OP_31_XOP_LWBRX:
953 regs->gpr[rd] = 0xffffffff;
956 case OP_31_XOP_LWZUX:
957 regs->gpr[rd] = 0xffffffff;
958 regs->gpr[ra] += regs->gpr[rb];
962 regs->gpr[rd] = 0xff;
965 case OP_31_XOP_LBZUX:
966 regs->gpr[rd] = 0xff;
967 regs->gpr[ra] += regs->gpr[rb];
971 case OP_31_XOP_LHBRX:
972 regs->gpr[rd] = 0xffff;
975 case OP_31_XOP_LHZUX:
976 regs->gpr[rd] = 0xffff;
977 regs->gpr[ra] += regs->gpr[rb];
981 regs->gpr[rd] = ~0UL;
984 case OP_31_XOP_LHAUX:
985 regs->gpr[rd] = ~0UL;
986 regs->gpr[ra] += regs->gpr[rb];
995 regs->gpr[rd] = 0xffffffff;
999 regs->gpr[rd] = 0xffffffff;
1000 regs->gpr[ra] += (s16)d;
1004 regs->gpr[rd] = 0xff;
1008 regs->gpr[rd] = 0xff;
1009 regs->gpr[ra] += (s16)d;
1013 regs->gpr[rd] = 0xffff;
1017 regs->gpr[rd] = 0xffff;
1018 regs->gpr[ra] += (s16)d;
1022 regs->gpr[rd] = ~0UL;
1026 regs->gpr[rd] = ~0UL;
1027 regs->gpr[ra] += (s16)d;
1037 static int is_in_pci_mem_space(phys_addr_t addr)
1039 struct pci_controller *hose;
1040 struct resource *res;
1043 list_for_each_entry(hose, &hose_list, list_node) {
1044 if (!(hose->indirect_type & PPC_INDIRECT_TYPE_EXT_REG))
1047 for (i = 0; i < 3; i++) {
1048 res = &hose->mem_resources[i];
1049 if ((res->flags & IORESOURCE_MEM) &&
1050 addr >= res->start && addr <= res->end)
1057 int fsl_pci_mcheck_exception(struct pt_regs *regs)
1061 phys_addr_t addr = 0;
1063 /* Let KVM/QEMU deal with the exception */
1064 if (regs->msr & MSR_GS)
1067 #ifdef CONFIG_PHYS_64BIT
1068 addr = mfspr(SPRN_MCARU);
1071 addr += mfspr(SPRN_MCAR);
1073 if (is_in_pci_mem_space(addr)) {
1074 if (user_mode(regs)) {
1075 pagefault_disable();
1076 ret = get_user(regs->nip, &inst);
1079 ret = probe_kernel_address((void *)regs->nip, inst);
1082 if (!ret && mcheck_handle_load(regs, inst)) {
1092 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
1093 static const struct of_device_id pci_ids[] = {
1094 { .compatible = "fsl,mpc8540-pci", },
1095 { .compatible = "fsl,mpc8548-pcie", },
1096 { .compatible = "fsl,mpc8610-pci", },
1097 { .compatible = "fsl,mpc8641-pcie", },
1098 { .compatible = "fsl,qoriq-pcie", },
1099 { .compatible = "fsl,qoriq-pcie-v2.1", },
1100 { .compatible = "fsl,qoriq-pcie-v2.2", },
1101 { .compatible = "fsl,qoriq-pcie-v2.3", },
1102 { .compatible = "fsl,qoriq-pcie-v2.4", },
1103 { .compatible = "fsl,qoriq-pcie-v3.0", },
1106 * The following entries are for compatibility with older device
1109 { .compatible = "fsl,p1022-pcie", },
1110 { .compatible = "fsl,p4080-pcie", },
1115 struct device_node *fsl_pci_primary;
1117 void fsl_pci_assign_primary(void)
1119 struct device_node *np;
1121 /* Callers can specify the primary bus using other means. */
1122 if (fsl_pci_primary)
1125 /* If a PCI host bridge contains an ISA node, it's primary. */
1126 np = of_find_node_by_type(NULL, "isa");
1127 while ((fsl_pci_primary = of_get_parent(np))) {
1129 np = fsl_pci_primary;
1131 if (of_match_node(pci_ids, np) && of_device_is_available(np))
1136 * If there's no PCI host bridge with ISA, arbitrarily
1137 * designate one as primary. This can go away once
1138 * various bugs with primary-less systems are fixed.
1140 for_each_matching_node(np, pci_ids) {
1141 if (of_device_is_available(np)) {
1142 fsl_pci_primary = np;
1149 #ifdef CONFIG_PM_SLEEP
1150 static irqreturn_t fsl_pci_pme_handle(int irq, void *dev_id)
1152 struct pci_controller *hose = dev_id;
1153 struct ccsr_pci __iomem *pci = hose->private_data;
1156 dr = in_be32(&pci->pex_pme_mes_dr);
1160 out_be32(&pci->pex_pme_mes_dr, dr);
1165 static int fsl_pci_pme_probe(struct pci_controller *hose)
1167 struct ccsr_pci __iomem *pci;
1168 struct pci_dev *dev;
1173 /* Get hose's pci_dev */
1174 dev = list_first_entry(&hose->bus->devices, typeof(*dev), bus_list);
1177 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1178 pms &= ~PCI_PM_CTRL_PME_ENABLE;
1179 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1181 pme_irq = irq_of_parse_and_map(hose->dn, 0);
1183 dev_err(&dev->dev, "Failed to map PME interrupt.\n");
1188 res = devm_request_irq(hose->parent, pme_irq,
1193 dev_err(&dev->dev, "Unable to request irq %d for PME\n", pme_irq);
1194 irq_dispose_mapping(pme_irq);
1199 pci = hose->private_data;
1201 /* Enable PTOD, ENL23D & EXL23D */
1202 clrbits32(&pci->pex_pme_mes_disr,
1203 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1205 out_be32(&pci->pex_pme_mes_ier, 0);
1206 setbits32(&pci->pex_pme_mes_ier,
1207 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1210 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1211 pms |= PCI_PM_CTRL_PME_ENABLE;
1212 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1217 static void send_pme_turnoff_message(struct pci_controller *hose)
1219 struct ccsr_pci __iomem *pci = hose->private_data;
1223 /* Send PME_Turn_Off Message Request */
1224 setbits32(&pci->pex_pmcr, PEX_PMCR_PTOMR);
1226 /* Wait trun off done */
1227 for (i = 0; i < 150; i++) {
1228 dr = in_be32(&pci->pex_pme_mes_dr);
1230 out_be32(&pci->pex_pme_mes_dr, dr);
1238 static void fsl_pci_syscore_do_suspend(struct pci_controller *hose)
1240 send_pme_turnoff_message(hose);
1243 static int fsl_pci_syscore_suspend(void)
1245 struct pci_controller *hose, *tmp;
1247 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1248 fsl_pci_syscore_do_suspend(hose);
1253 static void fsl_pci_syscore_do_resume(struct pci_controller *hose)
1255 struct ccsr_pci __iomem *pci = hose->private_data;
1259 /* Send Exit L2 State Message */
1260 setbits32(&pci->pex_pmcr, PEX_PMCR_EXL2S);
1262 /* Wait exit done */
1263 for (i = 0; i < 150; i++) {
1264 dr = in_be32(&pci->pex_pme_mes_dr);
1266 out_be32(&pci->pex_pme_mes_dr, dr);
1273 setup_pci_atmu(hose);
1276 static void fsl_pci_syscore_resume(void)
1278 struct pci_controller *hose, *tmp;
1280 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1281 fsl_pci_syscore_do_resume(hose);
1284 static struct syscore_ops pci_syscore_pm_ops = {
1285 .suspend = fsl_pci_syscore_suspend,
1286 .resume = fsl_pci_syscore_resume,
1290 void fsl_pcibios_fixup_phb(struct pci_controller *phb)
1292 #ifdef CONFIG_PM_SLEEP
1293 fsl_pci_pme_probe(phb);
1297 static int add_err_dev(struct platform_device *pdev)
1299 struct platform_device *errdev;
1300 struct mpc85xx_edac_pci_plat_data pd = {
1301 .of_node = pdev->dev.of_node
1304 errdev = platform_device_register_resndata(&pdev->dev,
1306 PLATFORM_DEVID_AUTO,
1308 pdev->num_resources,
1311 return PTR_ERR(errdev);
1316 static int fsl_pci_probe(struct platform_device *pdev)
1318 struct device_node *node;
1321 node = pdev->dev.of_node;
1322 ret = fsl_add_bridge(pdev, fsl_pci_primary == node);
1326 ret = add_err_dev(pdev);
1328 dev_err(&pdev->dev, "couldn't register error device: %d\n",
1334 static struct platform_driver fsl_pci_driver = {
1337 .of_match_table = pci_ids,
1339 .probe = fsl_pci_probe,
1342 static int __init fsl_pci_init(void)
1344 #ifdef CONFIG_PM_SLEEP
1345 register_syscore_ops(&pci_syscore_pm_ops);
1347 return platform_driver_register(&fsl_pci_driver);
1349 arch_initcall(fsl_pci_init);