2 * MPC83xx/85xx/86xx PCI/PCIE support routing.
4 * Copyright 2007-2012 Freescale Semiconductor, Inc.
5 * Copyright 2008-2009 MontaVista Software, Inc.
7 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
8 * Recode: ZHANG WEI <wei.zhang@freescale.com>
9 * Rewrite the routing for Frescale PCI and PCI Express
10 * Roy Zang <tie-fei.zang@freescale.com>
11 * MPC83xx PCI-Express support:
12 * Tony Li <tony.li@freescale.com>
13 * Anton Vorontsov <avorontsov@ru.mvista.com>
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 static u64 pci64_dma_offset;
116 #ifdef CONFIG_SWIOTLB
117 static void setup_swiotlb_ops(struct pci_controller *hose)
119 if (ppc_swiotlb_enable) {
120 hose->controller_ops.dma_dev_setup = pci_dma_dev_setup_swiotlb;
121 set_pci_dma_ops(&powerpc_swiotlb_dma_ops);
125 static inline void setup_swiotlb_ops(struct pci_controller *hose) {}
128 static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
130 if (!dev->dma_mask || !dma_supported(dev, dma_mask))
134 * Fix up PCI devices that are able to DMA to the large inbound
135 * mapping that allows addressing any RAM address from across PCI.
137 if (dev_is_pci(dev) && dma_mask >= pci64_dma_offset * 2 - 1) {
138 set_dma_ops(dev, &dma_nommu_ops);
139 set_dma_offset(dev, pci64_dma_offset);
142 *dev->dma_mask = dma_mask;
146 static int setup_one_atmu(struct ccsr_pci __iomem *pci,
147 unsigned int index, const struct resource *res,
148 resource_size_t offset)
150 resource_size_t pci_addr = res->start - offset;
151 resource_size_t phys_addr = res->start;
152 resource_size_t size = resource_size(res);
153 u32 flags = 0x80044000; /* enable & mem R/W */
156 pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
157 (u64)res->start, (u64)size);
159 if (res->flags & IORESOURCE_PREFETCH)
160 flags |= 0x10000000; /* enable relaxed ordering */
162 for (i = 0; size > 0; i++) {
163 unsigned int bits = min_t(u32, ilog2(size),
164 __ffs(pci_addr | phys_addr));
169 out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
170 out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
171 out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
172 out_be32(&pci->pow[index + i].powar, flags | (bits - 1));
174 pci_addr += (resource_size_t)1U << bits;
175 phys_addr += (resource_size_t)1U << bits;
176 size -= (resource_size_t)1U << bits;
182 static bool is_kdump(void)
184 struct device_node *node;
186 node = of_find_node_by_type(NULL, "memory");
192 return of_property_read_bool(node, "linux,usable-memory");
195 /* atmu setup for fsl pci/pcie controller */
196 static void setup_pci_atmu(struct pci_controller *hose)
198 struct ccsr_pci __iomem *pci = hose->private_data;
199 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
200 u64 mem, sz, paddr_hi = 0;
201 u64 offset = 0, paddr_lo = ULLONG_MAX;
202 u32 pcicsrbar = 0, pcicsrbar_sz;
203 u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
204 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
210 * If this is kdump, we don't want to trigger a bunch of PCI
211 * errors by closing the window on in-flight DMA.
213 * We still run most of the function's logic so that things like
214 * hose->dma_window_size still get set.
216 setup_inbound = !is_kdump();
218 if (of_device_is_compatible(hose->dn, "fsl,bsc9132-pcie")) {
220 * BSC9132 Rev1.0 has an issue where all the PEX inbound
221 * windows have implemented the default target value as 0xf
222 * for CCSR space.In all Freescale legacy devices the target
223 * of 0xf is reserved for local memory space. 9132 Rev1.0
224 * now has local mempry space mapped to target 0x0 instead of
225 * 0xf. Hence adding a workaround to remove the target 0xf
226 * defined for memory space from Inbound window attributes.
228 piwar &= ~PIWAR_TGI_LOCAL;
231 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
232 if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) {
239 /* Disable all windows (except powar0 since it's ignored) */
240 for(i = 1; i < 5; i++)
241 out_be32(&pci->pow[i].powar, 0);
244 for (i = start_idx; i < end_idx; i++)
245 out_be32(&pci->piw[i].piwar, 0);
248 /* Setup outbound MEM window */
249 for(i = 0, j = 1; i < 3; i++) {
250 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
253 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
254 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
256 /* We assume all memory resources have the same offset */
257 offset = hose->mem_offset[i];
258 n = setup_one_atmu(pci, j, &hose->mem_resources[i], offset);
260 if (n < 0 || j >= 5) {
261 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
262 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
267 /* Setup outbound IO window */
268 if (hose->io_resource.flags & IORESOURCE_IO) {
270 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
272 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
273 "phy base 0x%016llx.\n",
274 (u64)hose->io_resource.start,
275 (u64)resource_size(&hose->io_resource),
276 (u64)hose->io_base_phys);
277 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
278 out_be32(&pci->pow[j].potear, 0);
279 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
281 out_be32(&pci->pow[j].powar, 0x80088000
282 | (ilog2(hose->io_resource.end
283 - hose->io_resource.start + 1) - 1));
287 /* convert to pci address space */
291 if (paddr_hi == paddr_lo) {
292 pr_err("%pOF: No outbound window space\n", hose->dn);
297 pr_err("%pOF: No space for inbound window\n", hose->dn);
301 /* setup PCSRBAR/PEXCSRBAR */
302 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
303 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
304 pcicsrbar_sz = ~pcicsrbar_sz + 1;
306 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
307 (paddr_lo > 0x100000000ull))
308 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
310 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
311 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
313 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
315 pr_info("%pOF: PCICSRBAR @ 0x%x\n", hose->dn, pcicsrbar);
317 /* Setup inbound mem window */
318 mem = memblock_end_of_DRAM();
319 pr_info("%s: end of DRAM %llx\n", __func__, mem);
322 * The msi-address-64 property, if it exists, indicates the physical
323 * address of the MSIIR register. Normally, this register is located
324 * inside CCSR, so the ATMU that covers all of CCSR is used. But if
325 * this property exists, then we normally need to create a new ATMU
326 * for it. For now, however, we cheat. The only entity that creates
327 * this property is the Freescale hypervisor, and the address is
328 * specified in the partition configuration. Typically, the address
329 * is located in the page immediately after the end of DDR. If so, we
330 * can avoid allocating a new ATMU by extending the DDR ATMU by one
333 reg = of_get_property(hose->dn, "msi-address-64", &len);
334 if (reg && (len == sizeof(u64))) {
335 u64 address = be64_to_cpup(reg);
337 if ((address >= mem) && (address < (mem + PAGE_SIZE))) {
338 pr_info("%pOF: extending DDR ATMU to cover MSIIR", hose->dn);
341 /* TODO: Create a new ATMU for MSIIR */
342 pr_warn("%pOF: msi-address-64 address of %llx is "
343 "unsupported\n", hose->dn, address);
347 sz = min(mem, paddr_lo);
350 /* PCIe can overmap inbound & outbound since RX & TX are separated */
351 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
352 /* Size window to exact size if power-of-two or one size up */
353 if ((1ull << mem_log) != mem) {
355 if ((1ull << mem_log) > mem)
356 pr_info("%pOF: Setting PCI inbound window "
357 "greater than memory size\n", hose->dn);
360 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
363 /* Setup inbound memory window */
364 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
365 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
366 out_be32(&pci->piw[win_idx].piwar, piwar);
370 hose->dma_window_base_cur = 0x00000000;
371 hose->dma_window_size = (resource_size_t)sz;
374 * if we have >4G of memory setup second PCI inbound window to
375 * let devices that are 64-bit address capable to work w/o
376 * SWIOTLB and access the full range of memory
379 mem_log = ilog2(mem);
381 /* Size window up if we dont fit in exact power-of-2 */
382 if ((1ull << mem_log) != mem)
385 piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
386 pci64_dma_offset = 1ULL << mem_log;
389 /* Setup inbound memory window */
390 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
391 out_be32(&pci->piw[win_idx].piwbear,
392 pci64_dma_offset >> 44);
393 out_be32(&pci->piw[win_idx].piwbar,
394 pci64_dma_offset >> 12);
395 out_be32(&pci->piw[win_idx].piwar, piwar);
399 * install our own dma_set_mask handler to fixup dma_ops
402 ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
404 pr_info("%pOF: Setup 64-bit PCI DMA window\n", hose->dn);
410 /* Setup inbound memory window */
411 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
412 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
413 out_be32(&pci->piw[win_idx].piwar,
414 (piwar | (mem_log - 1)));
418 paddr += 1ull << mem_log;
419 sz -= 1ull << mem_log;
423 piwar |= (mem_log - 1);
426 out_be32(&pci->piw[win_idx].pitar,
428 out_be32(&pci->piw[win_idx].piwbar,
430 out_be32(&pci->piw[win_idx].piwar, piwar);
434 paddr += 1ull << mem_log;
437 hose->dma_window_base_cur = 0x00000000;
438 hose->dma_window_size = (resource_size_t)paddr;
441 if (hose->dma_window_size < mem) {
442 #ifdef CONFIG_SWIOTLB
443 ppc_swiotlb_enable = 1;
445 pr_err("%pOF: ERROR: Memory size exceeds PCI ATMU ability to "
446 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
449 /* adjusting outbound windows could reclaim space in mem map */
450 if (paddr_hi < 0xffffffffull)
451 pr_warn("%pOF: WARNING: Outbound window cfg leaves "
452 "gaps in memory map. Adjusting the memory map "
453 "could reduce unnecessary bounce buffering.\n",
456 pr_info("%pOF: DMA window size is 0x%llx\n", hose->dn,
457 (u64)hose->dma_window_size);
461 static void __init setup_pci_cmd(struct pci_controller *hose)
466 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
467 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
469 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
471 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
473 int pci_x_cmd = cap_x + PCI_X_CMD;
474 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
475 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
476 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
478 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
482 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
484 struct pci_controller *hose = pci_bus_to_host(bus);
485 int i, is_pcie = 0, no_link;
487 /* The root complex bridge comes up with bogus resources,
488 * we copy the PHB ones in.
490 * With the current generic PCI code, the PHB bus no longer
491 * has bus->resource[0..4] set, so things are a bit more
495 if (fsl_pcie_bus_fixup)
496 is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
497 no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
499 if (bus->parent == hose->bus && (is_pcie || no_link)) {
500 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
501 struct resource *res = bus->resource[i];
502 struct resource *par;
507 par = &hose->io_resource;
509 par = &hose->mem_resources[i-1];
512 res->start = par ? par->start : 0;
513 res->end = par ? par->end : 0;
514 res->flags = par ? par->flags : 0;
519 int fsl_add_bridge(struct platform_device *pdev, int is_primary)
522 struct pci_controller *hose;
523 struct resource rsrc;
524 const int *bus_range;
527 struct device_node *dev;
528 struct ccsr_pci __iomem *pci;
530 u32 svr = mfspr(SPRN_SVR);
532 dev = pdev->dev.of_node;
534 if (!of_device_is_available(dev)) {
535 pr_warn("%pOF: disabled\n", dev);
539 pr_debug("Adding PCI host bridge %pOF\n", dev);
541 /* Fetch host bridge registers address */
542 if (of_address_to_resource(dev, 0, &rsrc)) {
543 printk(KERN_WARNING "Can't get pci register base!");
547 /* Get bus range if any */
548 bus_range = of_get_property(dev, "bus-range", &len);
549 if (bus_range == NULL || len < 2 * sizeof(int))
550 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
553 pci_add_flags(PCI_REASSIGN_ALL_BUS);
554 hose = pcibios_alloc_controller(dev);
558 /* set platform device as the parent */
559 hose->parent = &pdev->dev;
560 hose->first_busno = bus_range ? bus_range[0] : 0x0;
561 hose->last_busno = bus_range ? bus_range[1] : 0xff;
563 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
564 (u64)rsrc.start, (u64)resource_size(&rsrc));
566 pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc));
567 if (!hose->private_data)
570 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
571 PPC_INDIRECT_TYPE_BIG_ENDIAN);
573 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0)
574 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
576 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
577 /* use fsl_indirect_read_config for PCIe */
578 hose->ops = &fsl_indirect_pcie_ops;
579 /* For PCIE read HEADER_TYPE to identify controller mode */
580 early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type);
581 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
585 /* For PCI read PROG to identify controller mode */
586 early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif);
588 !of_property_read_bool(dev, "fsl,pci-agent-force-enum"))
594 /* check PCI express link status */
595 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
596 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
597 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
598 if (fsl_pcie_check_link(hose))
599 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
600 /* Fix Class Code to PCI_CLASS_BRIDGE_PCI_NORMAL for pre-3.0 controller */
601 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0) {
602 early_read_config_dword(hose, 0, 0, PCIE_FSL_CSR_CLASSCODE, &class_code);
604 class_code |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
605 early_write_config_dword(hose, 0, 0, PCIE_FSL_CSR_CLASSCODE, class_code);
609 * Set PBFR(PCI Bus Function Register)[10] = 1 to
610 * disable the combining of crossing cacheline
611 * boundary requests into one burst transaction.
612 * PCI-X operation is not affected.
613 * Fix erratum PCI 5 on MPC8548
615 #define PCI_BUS_FUNCTION 0x44
616 #define PCI_BUS_FUNCTION_MDS 0x400 /* Master disable streaming */
617 if (((SVR_SOC_VER(svr) == SVR_8543) ||
618 (SVR_SOC_VER(svr) == SVR_8545) ||
619 (SVR_SOC_VER(svr) == SVR_8547) ||
620 (SVR_SOC_VER(svr) == SVR_8548)) &&
621 !early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX)) {
622 early_read_config_word(hose, 0, 0,
623 PCI_BUS_FUNCTION, &temp);
624 temp |= PCI_BUS_FUNCTION_MDS;
625 early_write_config_word(hose, 0, 0,
626 PCI_BUS_FUNCTION, temp);
630 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
631 "Firmware bus number: %d->%d\n",
632 (unsigned long long)rsrc.start, hose->first_busno,
635 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
636 hose, hose->cfg_addr, hose->cfg_data);
638 /* Interpret the "ranges" property */
639 /* This also maps the I/O region and sets isa_io/mem_base */
640 pci_process_bridge_OF_ranges(hose, dev, is_primary);
642 /* Setup PEX window registers */
643 setup_pci_atmu(hose);
645 /* Set up controller operations */
646 setup_swiotlb_ops(hose);
651 iounmap(hose->private_data);
652 /* unmap cfg_data & cfg_addr separately if not on same page */
653 if (((unsigned long)hose->cfg_data & PAGE_MASK) !=
654 ((unsigned long)hose->cfg_addr & PAGE_MASK))
655 iounmap(hose->cfg_data);
656 iounmap(hose->cfg_addr);
657 pcibios_free_controller(hose);
660 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
662 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID,
663 quirk_fsl_pcie_early);
665 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
666 struct mpc83xx_pcie_priv {
667 void __iomem *cfg_type0;
668 void __iomem *cfg_type1;
672 struct pex_inbound_window {
680 * With the convention of u-boot, the PCIE outbound window 0 serves
681 * as configuration transactions outbound.
683 #define PEX_OUTWIN0_BAR 0xCA4
684 #define PEX_OUTWIN0_TAL 0xCA8
685 #define PEX_OUTWIN0_TAH 0xCAC
686 #define PEX_RC_INWIN_BASE 0xE60
687 #define PEX_RCIWARn_EN 0x1
689 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
691 struct pci_controller *hose = pci_bus_to_host(bus);
693 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
694 return PCIBIOS_DEVICE_NOT_FOUND;
696 * Workaround for the HW bug: for Type 0 configure transactions the
697 * PCI-E controller does not check the device number bits and just
698 * assumes that the device number bits are 0.
700 if (bus->number == hose->first_busno ||
701 bus->primary == hose->first_busno) {
703 return PCIBIOS_DEVICE_NOT_FOUND;
706 if (ppc_md.pci_exclude_device) {
707 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
708 return PCIBIOS_DEVICE_NOT_FOUND;
711 return PCIBIOS_SUCCESSFUL;
714 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
715 unsigned int devfn, int offset)
717 struct pci_controller *hose = pci_bus_to_host(bus);
718 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
719 u32 dev_base = bus->number << 24 | devfn << 16;
722 ret = mpc83xx_pcie_exclude_device(bus, devfn);
729 if (bus->number == hose->first_busno)
730 return pcie->cfg_type0 + offset;
732 if (pcie->dev_base == dev_base)
735 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
737 pcie->dev_base = dev_base;
739 return pcie->cfg_type1 + offset;
742 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
743 int offset, int len, u32 val)
745 struct pci_controller *hose = pci_bus_to_host(bus);
747 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
748 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
751 return pci_generic_config_write(bus, devfn, offset, len, val);
754 static struct pci_ops mpc83xx_pcie_ops = {
755 .map_bus = mpc83xx_pcie_remap_cfg,
756 .read = pci_generic_config_read,
757 .write = mpc83xx_pcie_write_config,
760 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
761 struct resource *reg)
763 struct mpc83xx_pcie_priv *pcie;
767 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
771 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
772 if (!pcie->cfg_type0)
775 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
777 /* PCI-E isn't configured. */
782 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
783 if (!pcie->cfg_type1)
786 WARN_ON(hose->dn->data);
787 hose->dn->data = pcie;
788 hose->ops = &mpc83xx_pcie_ops;
789 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
791 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
792 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
794 if (fsl_pcie_check_link(hose))
795 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
799 iounmap(pcie->cfg_type0);
806 int __init mpc83xx_add_bridge(struct device_node *dev)
810 struct pci_controller *hose;
811 struct resource rsrc_reg;
812 struct resource rsrc_cfg;
813 const int *bus_range;
818 if (!of_device_is_available(dev)) {
819 pr_warn("%pOF: disabled by the firmware.\n",
823 pr_debug("Adding PCI host bridge %pOF\n", dev);
825 /* Fetch host bridge registers address */
826 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
827 printk(KERN_WARNING "Can't get pci register base!\n");
831 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
833 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
835 "No pci config register base in dev tree, "
838 * MPC83xx supports up to two host controllers
839 * one at 0x8500 has config space registers at 0x8300
840 * one at 0x8600 has config space registers at 0x8380
842 if ((rsrc_reg.start & 0xfffff) == 0x8500)
843 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
844 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
845 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
848 * Controller at offset 0x8500 is primary
850 if ((rsrc_reg.start & 0xfffff) == 0x8500)
855 /* Get bus range if any */
856 bus_range = of_get_property(dev, "bus-range", &len);
857 if (bus_range == NULL || len < 2 * sizeof(int)) {
858 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
862 pci_add_flags(PCI_REASSIGN_ALL_BUS);
863 hose = pcibios_alloc_controller(dev);
867 hose->first_busno = bus_range ? bus_range[0] : 0;
868 hose->last_busno = bus_range ? bus_range[1] : 0xff;
870 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
871 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
875 setup_indirect_pci(hose, rsrc_cfg.start,
876 rsrc_cfg.start + 4, 0);
879 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
880 "Firmware bus number: %d->%d\n",
881 (unsigned long long)rsrc_reg.start, hose->first_busno,
884 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
885 hose, hose->cfg_addr, hose->cfg_data);
887 /* Interpret the "ranges" property */
888 /* This also maps the I/O region and sets isa_io/mem_base */
889 pci_process_bridge_OF_ranges(hose, dev, primary);
893 pcibios_free_controller(hose);
896 #endif /* CONFIG_PPC_83xx */
898 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
900 #ifdef CONFIG_PPC_83xx
901 if (is_mpc83xx_pci) {
902 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
903 struct pex_inbound_window *in;
906 /* Walk the Root Complex Inbound windows to match IMMR base */
907 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
908 for (i = 0; i < 4; i++) {
909 /* not enabled, skip */
910 if (!(in_le32(&in[i].ar) & PEX_RCIWARn_EN))
913 if (get_immrbase() == in_le32(&in[i].tar))
914 return (u64)in_le32(&in[i].barh) << 32 |
915 in_le32(&in[i].barl);
918 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
922 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
923 if (!is_mpc83xx_pci) {
926 pci_bus_read_config_dword(hose->bus,
927 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
930 * For PEXCSRBAR, bit 3-0 indicate prefetchable and
931 * address type. So when getting base address, these
932 * bits should be masked
934 base &= PCI_BASE_ADDRESS_MEM_MASK;
944 static int mcheck_handle_load(struct pt_regs *regs, u32 inst)
946 unsigned int rd, ra, rb, d;
953 switch (get_op(inst)) {
955 switch (get_xop(inst)) {
957 case OP_31_XOP_LWBRX:
958 regs->gpr[rd] = 0xffffffff;
961 case OP_31_XOP_LWZUX:
962 regs->gpr[rd] = 0xffffffff;
963 regs->gpr[ra] += regs->gpr[rb];
967 regs->gpr[rd] = 0xff;
970 case OP_31_XOP_LBZUX:
971 regs->gpr[rd] = 0xff;
972 regs->gpr[ra] += regs->gpr[rb];
976 case OP_31_XOP_LHBRX:
977 regs->gpr[rd] = 0xffff;
980 case OP_31_XOP_LHZUX:
981 regs->gpr[rd] = 0xffff;
982 regs->gpr[ra] += regs->gpr[rb];
986 regs->gpr[rd] = ~0UL;
989 case OP_31_XOP_LHAUX:
990 regs->gpr[rd] = ~0UL;
991 regs->gpr[ra] += regs->gpr[rb];
1000 regs->gpr[rd] = 0xffffffff;
1004 regs->gpr[rd] = 0xffffffff;
1005 regs->gpr[ra] += (s16)d;
1009 regs->gpr[rd] = 0xff;
1013 regs->gpr[rd] = 0xff;
1014 regs->gpr[ra] += (s16)d;
1018 regs->gpr[rd] = 0xffff;
1022 regs->gpr[rd] = 0xffff;
1023 regs->gpr[ra] += (s16)d;
1027 regs->gpr[rd] = ~0UL;
1031 regs->gpr[rd] = ~0UL;
1032 regs->gpr[ra] += (s16)d;
1042 static int is_in_pci_mem_space(phys_addr_t addr)
1044 struct pci_controller *hose;
1045 struct resource *res;
1048 list_for_each_entry(hose, &hose_list, list_node) {
1049 if (!(hose->indirect_type & PPC_INDIRECT_TYPE_EXT_REG))
1052 for (i = 0; i < 3; i++) {
1053 res = &hose->mem_resources[i];
1054 if ((res->flags & IORESOURCE_MEM) &&
1055 addr >= res->start && addr <= res->end)
1062 int fsl_pci_mcheck_exception(struct pt_regs *regs)
1066 phys_addr_t addr = 0;
1068 /* Let KVM/QEMU deal with the exception */
1069 if (regs->msr & MSR_GS)
1072 #ifdef CONFIG_PHYS_64BIT
1073 addr = mfspr(SPRN_MCARU);
1076 addr += mfspr(SPRN_MCAR);
1078 if (is_in_pci_mem_space(addr)) {
1079 if (user_mode(regs)) {
1080 pagefault_disable();
1081 ret = get_user(inst, (__u32 __user *)regs->nip);
1084 ret = probe_kernel_address((void *)regs->nip, inst);
1087 if (!ret && mcheck_handle_load(regs, inst)) {
1097 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
1098 static const struct of_device_id pci_ids[] = {
1099 { .compatible = "fsl,mpc8540-pci", },
1100 { .compatible = "fsl,mpc8548-pcie", },
1101 { .compatible = "fsl,mpc8610-pci", },
1102 { .compatible = "fsl,mpc8641-pcie", },
1103 { .compatible = "fsl,qoriq-pcie", },
1104 { .compatible = "fsl,qoriq-pcie-v2.1", },
1105 { .compatible = "fsl,qoriq-pcie-v2.2", },
1106 { .compatible = "fsl,qoriq-pcie-v2.3", },
1107 { .compatible = "fsl,qoriq-pcie-v2.4", },
1108 { .compatible = "fsl,qoriq-pcie-v3.0", },
1111 * The following entries are for compatibility with older device
1114 { .compatible = "fsl,p1022-pcie", },
1115 { .compatible = "fsl,p4080-pcie", },
1120 struct device_node *fsl_pci_primary;
1122 void fsl_pci_assign_primary(void)
1124 struct device_node *np;
1126 /* Callers can specify the primary bus using other means. */
1127 if (fsl_pci_primary)
1130 /* If a PCI host bridge contains an ISA node, it's primary. */
1131 np = of_find_node_by_type(NULL, "isa");
1132 while ((fsl_pci_primary = of_get_parent(np))) {
1134 np = fsl_pci_primary;
1136 if (of_match_node(pci_ids, np) && of_device_is_available(np))
1141 * If there's no PCI host bridge with ISA, arbitrarily
1142 * designate one as primary. This can go away once
1143 * various bugs with primary-less systems are fixed.
1145 for_each_matching_node(np, pci_ids) {
1146 if (of_device_is_available(np)) {
1147 fsl_pci_primary = np;
1154 #ifdef CONFIG_PM_SLEEP
1155 static irqreturn_t fsl_pci_pme_handle(int irq, void *dev_id)
1157 struct pci_controller *hose = dev_id;
1158 struct ccsr_pci __iomem *pci = hose->private_data;
1161 dr = in_be32(&pci->pex_pme_mes_dr);
1165 out_be32(&pci->pex_pme_mes_dr, dr);
1170 static int fsl_pci_pme_probe(struct pci_controller *hose)
1172 struct ccsr_pci __iomem *pci;
1173 struct pci_dev *dev;
1178 /* Get hose's pci_dev */
1179 dev = list_first_entry(&hose->bus->devices, typeof(*dev), bus_list);
1182 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1183 pms &= ~PCI_PM_CTRL_PME_ENABLE;
1184 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1186 pme_irq = irq_of_parse_and_map(hose->dn, 0);
1188 dev_err(&dev->dev, "Failed to map PME interrupt.\n");
1193 res = devm_request_irq(hose->parent, pme_irq,
1198 dev_err(&dev->dev, "Unable to request irq %d for PME\n", pme_irq);
1199 irq_dispose_mapping(pme_irq);
1204 pci = hose->private_data;
1206 /* Enable PTOD, ENL23D & EXL23D */
1207 clrbits32(&pci->pex_pme_mes_disr,
1208 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1210 out_be32(&pci->pex_pme_mes_ier, 0);
1211 setbits32(&pci->pex_pme_mes_ier,
1212 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1215 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1216 pms |= PCI_PM_CTRL_PME_ENABLE;
1217 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1222 static void send_pme_turnoff_message(struct pci_controller *hose)
1224 struct ccsr_pci __iomem *pci = hose->private_data;
1228 /* Send PME_Turn_Off Message Request */
1229 setbits32(&pci->pex_pmcr, PEX_PMCR_PTOMR);
1231 /* Wait trun off done */
1232 for (i = 0; i < 150; i++) {
1233 dr = in_be32(&pci->pex_pme_mes_dr);
1235 out_be32(&pci->pex_pme_mes_dr, dr);
1243 static void fsl_pci_syscore_do_suspend(struct pci_controller *hose)
1245 send_pme_turnoff_message(hose);
1248 static int fsl_pci_syscore_suspend(void)
1250 struct pci_controller *hose, *tmp;
1252 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1253 fsl_pci_syscore_do_suspend(hose);
1258 static void fsl_pci_syscore_do_resume(struct pci_controller *hose)
1260 struct ccsr_pci __iomem *pci = hose->private_data;
1264 /* Send Exit L2 State Message */
1265 setbits32(&pci->pex_pmcr, PEX_PMCR_EXL2S);
1267 /* Wait exit done */
1268 for (i = 0; i < 150; i++) {
1269 dr = in_be32(&pci->pex_pme_mes_dr);
1271 out_be32(&pci->pex_pme_mes_dr, dr);
1278 setup_pci_atmu(hose);
1281 static void fsl_pci_syscore_resume(void)
1283 struct pci_controller *hose, *tmp;
1285 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1286 fsl_pci_syscore_do_resume(hose);
1289 static struct syscore_ops pci_syscore_pm_ops = {
1290 .suspend = fsl_pci_syscore_suspend,
1291 .resume = fsl_pci_syscore_resume,
1295 void fsl_pcibios_fixup_phb(struct pci_controller *phb)
1297 #ifdef CONFIG_PM_SLEEP
1298 fsl_pci_pme_probe(phb);
1302 static int add_err_dev(struct platform_device *pdev)
1304 struct platform_device *errdev;
1305 struct mpc85xx_edac_pci_plat_data pd = {
1306 .of_node = pdev->dev.of_node
1309 errdev = platform_device_register_resndata(&pdev->dev,
1311 PLATFORM_DEVID_AUTO,
1313 pdev->num_resources,
1316 return PTR_ERR_OR_ZERO(errdev);
1319 static int fsl_pci_probe(struct platform_device *pdev)
1321 struct device_node *node;
1324 node = pdev->dev.of_node;
1325 ret = fsl_add_bridge(pdev, fsl_pci_primary == node);
1329 ret = add_err_dev(pdev);
1331 dev_err(&pdev->dev, "couldn't register error device: %d\n",
1337 static struct platform_driver fsl_pci_driver = {
1340 .of_match_table = pci_ids,
1342 .probe = fsl_pci_probe,
1345 static int __init fsl_pci_init(void)
1347 #ifdef CONFIG_PM_SLEEP
1348 register_syscore_ops(&pci_syscore_pm_ops);
1350 return platform_driver_register(&fsl_pci_driver);
1352 arch_initcall(fsl_pci_init);