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(&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_direct_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;
205 const char *name = hose->dn->full_name;
211 * If this is kdump, we don't want to trigger a bunch of PCI
212 * errors by closing the window on in-flight DMA.
214 * We still run most of the function's logic so that things like
215 * hose->dma_window_size still get set.
217 setup_inbound = !is_kdump();
219 if (of_device_is_compatible(hose->dn, "fsl,bsc9132-pcie")) {
221 * BSC9132 Rev1.0 has an issue where all the PEX inbound
222 * windows have implemented the default target value as 0xf
223 * for CCSR space.In all Freescale legacy devices the target
224 * of 0xf is reserved for local memory space. 9132 Rev1.0
225 * now has local mempry space mapped to target 0x0 instead of
226 * 0xf. Hence adding a workaround to remove the target 0xf
227 * defined for memory space from Inbound window attributes.
229 piwar &= ~PIWAR_TGI_LOCAL;
232 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
233 if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) {
240 /* Disable all windows (except powar0 since it's ignored) */
241 for(i = 1; i < 5; i++)
242 out_be32(&pci->pow[i].powar, 0);
245 for (i = start_idx; i < end_idx; i++)
246 out_be32(&pci->piw[i].piwar, 0);
249 /* Setup outbound MEM window */
250 for(i = 0, j = 1; i < 3; i++) {
251 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
254 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
255 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
257 /* We assume all memory resources have the same offset */
258 offset = hose->mem_offset[i];
259 n = setup_one_atmu(pci, j, &hose->mem_resources[i], offset);
261 if (n < 0 || j >= 5) {
262 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
263 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
268 /* Setup outbound IO window */
269 if (hose->io_resource.flags & IORESOURCE_IO) {
271 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
273 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
274 "phy base 0x%016llx.\n",
275 (u64)hose->io_resource.start,
276 (u64)resource_size(&hose->io_resource),
277 (u64)hose->io_base_phys);
278 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
279 out_be32(&pci->pow[j].potear, 0);
280 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
282 out_be32(&pci->pow[j].powar, 0x80088000
283 | (ilog2(hose->io_resource.end
284 - hose->io_resource.start + 1) - 1));
288 /* convert to pci address space */
292 if (paddr_hi == paddr_lo) {
293 pr_err("%s: No outbound window space\n", name);
298 pr_err("%s: No space for inbound window\n", name);
302 /* setup PCSRBAR/PEXCSRBAR */
303 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
304 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
305 pcicsrbar_sz = ~pcicsrbar_sz + 1;
307 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
308 (paddr_lo > 0x100000000ull))
309 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
311 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
312 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
314 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
316 pr_info("%s: PCICSRBAR @ 0x%x\n", name, pcicsrbar);
318 /* Setup inbound mem window */
319 mem = memblock_end_of_DRAM();
320 pr_info("%s: end of DRAM %llx\n", __func__, mem);
323 * The msi-address-64 property, if it exists, indicates the physical
324 * address of the MSIIR register. Normally, this register is located
325 * inside CCSR, so the ATMU that covers all of CCSR is used. But if
326 * this property exists, then we normally need to create a new ATMU
327 * for it. For now, however, we cheat. The only entity that creates
328 * this property is the Freescale hypervisor, and the address is
329 * specified in the partition configuration. Typically, the address
330 * is located in the page immediately after the end of DDR. If so, we
331 * can avoid allocating a new ATMU by extending the DDR ATMU by one
334 reg = of_get_property(hose->dn, "msi-address-64", &len);
335 if (reg && (len == sizeof(u64))) {
336 u64 address = be64_to_cpup(reg);
338 if ((address >= mem) && (address < (mem + PAGE_SIZE))) {
339 pr_info("%s: extending DDR ATMU to cover MSIIR", name);
342 /* TODO: Create a new ATMU for MSIIR */
343 pr_warn("%s: msi-address-64 address of %llx is "
344 "unsupported\n", name, address);
348 sz = min(mem, paddr_lo);
351 /* PCIe can overmap inbound & outbound since RX & TX are separated */
352 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
353 /* Size window to exact size if power-of-two or one size up */
354 if ((1ull << mem_log) != mem) {
356 if ((1ull << mem_log) > mem)
357 pr_info("%s: Setting PCI inbound window "
358 "greater than memory size\n", name);
361 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
364 /* Setup inbound memory window */
365 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
366 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
367 out_be32(&pci->piw[win_idx].piwar, piwar);
371 hose->dma_window_base_cur = 0x00000000;
372 hose->dma_window_size = (resource_size_t)sz;
375 * if we have >4G of memory setup second PCI inbound window to
376 * let devices that are 64-bit address capable to work w/o
377 * SWIOTLB and access the full range of memory
380 mem_log = ilog2(mem);
382 /* Size window up if we dont fit in exact power-of-2 */
383 if ((1ull << mem_log) != mem)
386 piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
387 pci64_dma_offset = 1ULL << mem_log;
390 /* Setup inbound memory window */
391 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
392 out_be32(&pci->piw[win_idx].piwbear,
393 pci64_dma_offset >> 44);
394 out_be32(&pci->piw[win_idx].piwbar,
395 pci64_dma_offset >> 12);
396 out_be32(&pci->piw[win_idx].piwar, piwar);
400 * install our own dma_set_mask handler to fixup dma_ops
403 ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
405 pr_info("%s: Setup 64-bit PCI DMA window\n", name);
411 /* Setup inbound memory window */
412 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
413 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
414 out_be32(&pci->piw[win_idx].piwar,
415 (piwar | (mem_log - 1)));
419 paddr += 1ull << mem_log;
420 sz -= 1ull << mem_log;
424 piwar |= (mem_log - 1);
427 out_be32(&pci->piw[win_idx].pitar,
429 out_be32(&pci->piw[win_idx].piwbar,
431 out_be32(&pci->piw[win_idx].piwar, piwar);
435 paddr += 1ull << mem_log;
438 hose->dma_window_base_cur = 0x00000000;
439 hose->dma_window_size = (resource_size_t)paddr;
442 if (hose->dma_window_size < mem) {
443 #ifdef CONFIG_SWIOTLB
444 ppc_swiotlb_enable = 1;
446 pr_err("%s: ERROR: Memory size exceeds PCI ATMU ability to "
447 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
450 /* adjusting outbound windows could reclaim space in mem map */
451 if (paddr_hi < 0xffffffffull)
452 pr_warning("%s: WARNING: Outbound window cfg leaves "
453 "gaps in memory map. Adjusting the memory map "
454 "could reduce unnecessary bounce buffering.\n",
457 pr_info("%s: DMA window size is 0x%llx\n", name,
458 (u64)hose->dma_window_size);
462 static void __init setup_pci_cmd(struct pci_controller *hose)
467 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
468 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
470 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
472 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
474 int pci_x_cmd = cap_x + PCI_X_CMD;
475 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
476 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
477 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
479 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
483 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
485 struct pci_controller *hose = pci_bus_to_host(bus);
486 int i, is_pcie = 0, no_link;
488 /* The root complex bridge comes up with bogus resources,
489 * we copy the PHB ones in.
491 * With the current generic PCI code, the PHB bus no longer
492 * has bus->resource[0..4] set, so things are a bit more
496 if (fsl_pcie_bus_fixup)
497 is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
498 no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
500 if (bus->parent == hose->bus && (is_pcie || no_link)) {
501 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
502 struct resource *res = bus->resource[i];
503 struct resource *par;
508 par = &hose->io_resource;
510 par = &hose->mem_resources[i-1];
513 res->start = par ? par->start : 0;
514 res->end = par ? par->end : 0;
515 res->flags = par ? par->flags : 0;
520 int fsl_add_bridge(struct platform_device *pdev, int is_primary)
523 struct pci_controller *hose;
524 struct resource rsrc;
525 const int *bus_range;
528 struct device_node *dev;
529 struct ccsr_pci __iomem *pci;
531 u32 svr = mfspr(SPRN_SVR);
533 dev = pdev->dev.of_node;
535 if (!of_device_is_available(dev)) {
536 pr_warning("%s: disabled\n", dev->full_name);
540 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
542 /* Fetch host bridge registers address */
543 if (of_address_to_resource(dev, 0, &rsrc)) {
544 printk(KERN_WARNING "Can't get pci register base!");
548 /* Get bus range if any */
549 bus_range = of_get_property(dev, "bus-range", &len);
550 if (bus_range == NULL || len < 2 * sizeof(int))
551 printk(KERN_WARNING "Can't get bus-range for %s, assume"
552 " bus 0\n", dev->full_name);
554 pci_add_flags(PCI_REASSIGN_ALL_BUS);
555 hose = pcibios_alloc_controller(dev);
559 /* set platform device as the parent */
560 hose->parent = &pdev->dev;
561 hose->first_busno = bus_range ? bus_range[0] : 0x0;
562 hose->last_busno = bus_range ? bus_range[1] : 0xff;
564 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
565 (u64)rsrc.start, (u64)resource_size(&rsrc));
567 pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc));
568 if (!hose->private_data)
571 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
572 PPC_INDIRECT_TYPE_BIG_ENDIAN);
574 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0)
575 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
577 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
578 /* use fsl_indirect_read_config for PCIe */
579 hose->ops = &fsl_indirect_pcie_ops;
580 /* For PCIE read HEADER_TYPE to identify controller mode */
581 early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type);
582 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
586 /* For PCI read PROG to identify controller mode */
587 early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif);
589 !of_property_read_bool(dev, "fsl,pci-agent-force-enum"))
595 /* check PCI express link status */
596 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
597 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
598 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
599 if (fsl_pcie_check_link(hose))
600 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
601 /* Fix Class Code to PCI_CLASS_BRIDGE_PCI_NORMAL for pre-3.0 controller */
602 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0) {
603 early_read_config_dword(hose, 0, 0, PCIE_FSL_CSR_CLASSCODE, &class_code);
605 class_code |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
606 early_write_config_dword(hose, 0, 0, PCIE_FSL_CSR_CLASSCODE, class_code);
610 * Set PBFR(PCI Bus Function Register)[10] = 1 to
611 * disable the combining of crossing cacheline
612 * boundary requests into one burst transaction.
613 * PCI-X operation is not affected.
614 * Fix erratum PCI 5 on MPC8548
616 #define PCI_BUS_FUNCTION 0x44
617 #define PCI_BUS_FUNCTION_MDS 0x400 /* Master disable streaming */
618 if (((SVR_SOC_VER(svr) == SVR_8543) ||
619 (SVR_SOC_VER(svr) == SVR_8545) ||
620 (SVR_SOC_VER(svr) == SVR_8547) ||
621 (SVR_SOC_VER(svr) == SVR_8548)) &&
622 !early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX)) {
623 early_read_config_word(hose, 0, 0,
624 PCI_BUS_FUNCTION, &temp);
625 temp |= PCI_BUS_FUNCTION_MDS;
626 early_write_config_word(hose, 0, 0,
627 PCI_BUS_FUNCTION, temp);
631 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
632 "Firmware bus number: %d->%d\n",
633 (unsigned long long)rsrc.start, hose->first_busno,
636 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
637 hose, hose->cfg_addr, hose->cfg_data);
639 /* Interpret the "ranges" property */
640 /* This also maps the I/O region and sets isa_io/mem_base */
641 pci_process_bridge_OF_ranges(hose, dev, is_primary);
643 /* Setup PEX window registers */
644 setup_pci_atmu(hose);
646 /* Set up controller operations */
647 setup_swiotlb_ops(hose);
652 iounmap(hose->private_data);
653 /* unmap cfg_data & cfg_addr separately if not on same page */
654 if (((unsigned long)hose->cfg_data & PAGE_MASK) !=
655 ((unsigned long)hose->cfg_addr & PAGE_MASK))
656 iounmap(hose->cfg_data);
657 iounmap(hose->cfg_addr);
658 pcibios_free_controller(hose);
661 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
663 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID,
664 quirk_fsl_pcie_early);
666 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
667 struct mpc83xx_pcie_priv {
668 void __iomem *cfg_type0;
669 void __iomem *cfg_type1;
673 struct pex_inbound_window {
681 * With the convention of u-boot, the PCIE outbound window 0 serves
682 * as configuration transactions outbound.
684 #define PEX_OUTWIN0_BAR 0xCA4
685 #define PEX_OUTWIN0_TAL 0xCA8
686 #define PEX_OUTWIN0_TAH 0xCAC
687 #define PEX_RC_INWIN_BASE 0xE60
688 #define PEX_RCIWARn_EN 0x1
690 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
692 struct pci_controller *hose = pci_bus_to_host(bus);
694 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
695 return PCIBIOS_DEVICE_NOT_FOUND;
697 * Workaround for the HW bug: for Type 0 configure transactions the
698 * PCI-E controller does not check the device number bits and just
699 * assumes that the device number bits are 0.
701 if (bus->number == hose->first_busno ||
702 bus->primary == hose->first_busno) {
704 return PCIBIOS_DEVICE_NOT_FOUND;
707 if (ppc_md.pci_exclude_device) {
708 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
709 return PCIBIOS_DEVICE_NOT_FOUND;
712 return PCIBIOS_SUCCESSFUL;
715 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
716 unsigned int devfn, int offset)
718 struct pci_controller *hose = pci_bus_to_host(bus);
719 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
720 u32 dev_base = bus->number << 24 | devfn << 16;
723 ret = mpc83xx_pcie_exclude_device(bus, devfn);
730 if (bus->number == hose->first_busno)
731 return pcie->cfg_type0 + offset;
733 if (pcie->dev_base == dev_base)
736 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
738 pcie->dev_base = dev_base;
740 return pcie->cfg_type1 + offset;
743 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
744 int offset, int len, u32 val)
746 struct pci_controller *hose = pci_bus_to_host(bus);
748 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
749 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
752 return pci_generic_config_write(bus, devfn, offset, len, val);
755 static struct pci_ops mpc83xx_pcie_ops = {
756 .map_bus = mpc83xx_pcie_remap_cfg,
757 .read = pci_generic_config_read,
758 .write = mpc83xx_pcie_write_config,
761 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
762 struct resource *reg)
764 struct mpc83xx_pcie_priv *pcie;
768 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
772 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
773 if (!pcie->cfg_type0)
776 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
778 /* PCI-E isn't configured. */
783 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
784 if (!pcie->cfg_type1)
787 WARN_ON(hose->dn->data);
788 hose->dn->data = pcie;
789 hose->ops = &mpc83xx_pcie_ops;
790 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
792 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
793 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
795 if (fsl_pcie_check_link(hose))
796 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
800 iounmap(pcie->cfg_type0);
807 int __init mpc83xx_add_bridge(struct device_node *dev)
811 struct pci_controller *hose;
812 struct resource rsrc_reg;
813 struct resource rsrc_cfg;
814 const int *bus_range;
819 if (!of_device_is_available(dev)) {
820 pr_warning("%s: disabled by the firmware.\n",
824 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
826 /* Fetch host bridge registers address */
827 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
828 printk(KERN_WARNING "Can't get pci register base!\n");
832 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
834 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
836 "No pci config register base in dev tree, "
839 * MPC83xx supports up to two host controllers
840 * one at 0x8500 has config space registers at 0x8300
841 * one at 0x8600 has config space registers at 0x8380
843 if ((rsrc_reg.start & 0xfffff) == 0x8500)
844 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
845 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
846 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
849 * Controller at offset 0x8500 is primary
851 if ((rsrc_reg.start & 0xfffff) == 0x8500)
856 /* Get bus range if any */
857 bus_range = of_get_property(dev, "bus-range", &len);
858 if (bus_range == NULL || len < 2 * sizeof(int)) {
859 printk(KERN_WARNING "Can't get bus-range for %s, assume"
860 " bus 0\n", dev->full_name);
863 pci_add_flags(PCI_REASSIGN_ALL_BUS);
864 hose = pcibios_alloc_controller(dev);
868 hose->first_busno = bus_range ? bus_range[0] : 0;
869 hose->last_busno = bus_range ? bus_range[1] : 0xff;
871 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
872 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
876 setup_indirect_pci(hose, rsrc_cfg.start,
877 rsrc_cfg.start + 4, 0);
880 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
881 "Firmware bus number: %d->%d\n",
882 (unsigned long long)rsrc_reg.start, hose->first_busno,
885 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
886 hose, hose->cfg_addr, hose->cfg_data);
888 /* Interpret the "ranges" property */
889 /* This also maps the I/O region and sets isa_io/mem_base */
890 pci_process_bridge_OF_ranges(hose, dev, primary);
894 pcibios_free_controller(hose);
897 #endif /* CONFIG_PPC_83xx */
899 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
901 #ifdef CONFIG_PPC_83xx
902 if (is_mpc83xx_pci) {
903 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
904 struct pex_inbound_window *in;
907 /* Walk the Root Complex Inbound windows to match IMMR base */
908 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
909 for (i = 0; i < 4; i++) {
910 /* not enabled, skip */
911 if (!(in_le32(&in[i].ar) & PEX_RCIWARn_EN))
914 if (get_immrbase() == in_le32(&in[i].tar))
915 return (u64)in_le32(&in[i].barh) << 32 |
916 in_le32(&in[i].barl);
919 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
923 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
924 if (!is_mpc83xx_pci) {
927 pci_bus_read_config_dword(hose->bus,
928 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
931 * For PEXCSRBAR, bit 3-0 indicate prefetchable and
932 * address type. So when getting base address, these
933 * bits should be masked
935 base &= PCI_BASE_ADDRESS_MEM_MASK;
945 static int mcheck_handle_load(struct pt_regs *regs, u32 inst)
947 unsigned int rd, ra, rb, d;
954 switch (get_op(inst)) {
956 switch (get_xop(inst)) {
958 case OP_31_XOP_LWBRX:
959 regs->gpr[rd] = 0xffffffff;
962 case OP_31_XOP_LWZUX:
963 regs->gpr[rd] = 0xffffffff;
964 regs->gpr[ra] += regs->gpr[rb];
968 regs->gpr[rd] = 0xff;
971 case OP_31_XOP_LBZUX:
972 regs->gpr[rd] = 0xff;
973 regs->gpr[ra] += regs->gpr[rb];
977 case OP_31_XOP_LHBRX:
978 regs->gpr[rd] = 0xffff;
981 case OP_31_XOP_LHZUX:
982 regs->gpr[rd] = 0xffff;
983 regs->gpr[ra] += regs->gpr[rb];
987 regs->gpr[rd] = ~0UL;
990 case OP_31_XOP_LHAUX:
991 regs->gpr[rd] = ~0UL;
992 regs->gpr[ra] += regs->gpr[rb];
1001 regs->gpr[rd] = 0xffffffff;
1005 regs->gpr[rd] = 0xffffffff;
1006 regs->gpr[ra] += (s16)d;
1010 regs->gpr[rd] = 0xff;
1014 regs->gpr[rd] = 0xff;
1015 regs->gpr[ra] += (s16)d;
1019 regs->gpr[rd] = 0xffff;
1023 regs->gpr[rd] = 0xffff;
1024 regs->gpr[ra] += (s16)d;
1028 regs->gpr[rd] = ~0UL;
1032 regs->gpr[rd] = ~0UL;
1033 regs->gpr[ra] += (s16)d;
1043 static int is_in_pci_mem_space(phys_addr_t addr)
1045 struct pci_controller *hose;
1046 struct resource *res;
1049 list_for_each_entry(hose, &hose_list, list_node) {
1050 if (!(hose->indirect_type & PPC_INDIRECT_TYPE_EXT_REG))
1053 for (i = 0; i < 3; i++) {
1054 res = &hose->mem_resources[i];
1055 if ((res->flags & IORESOURCE_MEM) &&
1056 addr >= res->start && addr <= res->end)
1063 int fsl_pci_mcheck_exception(struct pt_regs *regs)
1067 phys_addr_t addr = 0;
1069 /* Let KVM/QEMU deal with the exception */
1070 if (regs->msr & MSR_GS)
1073 #ifdef CONFIG_PHYS_64BIT
1074 addr = mfspr(SPRN_MCARU);
1077 addr += mfspr(SPRN_MCAR);
1079 if (is_in_pci_mem_space(addr)) {
1080 if (user_mode(regs)) {
1081 pagefault_disable();
1082 ret = get_user(regs->nip, &inst);
1085 ret = probe_kernel_address((void *)regs->nip, inst);
1088 if (!ret && mcheck_handle_load(regs, inst)) {
1098 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
1099 static const struct of_device_id pci_ids[] = {
1100 { .compatible = "fsl,mpc8540-pci", },
1101 { .compatible = "fsl,mpc8548-pcie", },
1102 { .compatible = "fsl,mpc8610-pci", },
1103 { .compatible = "fsl,mpc8641-pcie", },
1104 { .compatible = "fsl,qoriq-pcie", },
1105 { .compatible = "fsl,qoriq-pcie-v2.1", },
1106 { .compatible = "fsl,qoriq-pcie-v2.2", },
1107 { .compatible = "fsl,qoriq-pcie-v2.3", },
1108 { .compatible = "fsl,qoriq-pcie-v2.4", },
1109 { .compatible = "fsl,qoriq-pcie-v3.0", },
1112 * The following entries are for compatibility with older device
1115 { .compatible = "fsl,p1022-pcie", },
1116 { .compatible = "fsl,p4080-pcie", },
1121 struct device_node *fsl_pci_primary;
1123 void fsl_pci_assign_primary(void)
1125 struct device_node *np;
1127 /* Callers can specify the primary bus using other means. */
1128 if (fsl_pci_primary)
1131 /* If a PCI host bridge contains an ISA node, it's primary. */
1132 np = of_find_node_by_type(NULL, "isa");
1133 while ((fsl_pci_primary = of_get_parent(np))) {
1135 np = fsl_pci_primary;
1137 if (of_match_node(pci_ids, np) && of_device_is_available(np))
1142 * If there's no PCI host bridge with ISA, arbitrarily
1143 * designate one as primary. This can go away once
1144 * various bugs with primary-less systems are fixed.
1146 for_each_matching_node(np, pci_ids) {
1147 if (of_device_is_available(np)) {
1148 fsl_pci_primary = np;
1155 #ifdef CONFIG_PM_SLEEP
1156 static irqreturn_t fsl_pci_pme_handle(int irq, void *dev_id)
1158 struct pci_controller *hose = dev_id;
1159 struct ccsr_pci __iomem *pci = hose->private_data;
1162 dr = in_be32(&pci->pex_pme_mes_dr);
1166 out_be32(&pci->pex_pme_mes_dr, dr);
1171 static int fsl_pci_pme_probe(struct pci_controller *hose)
1173 struct ccsr_pci __iomem *pci;
1174 struct pci_dev *dev;
1179 /* Get hose's pci_dev */
1180 dev = list_first_entry(&hose->bus->devices, typeof(*dev), bus_list);
1183 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1184 pms &= ~PCI_PM_CTRL_PME_ENABLE;
1185 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1187 pme_irq = irq_of_parse_and_map(hose->dn, 0);
1189 dev_err(&dev->dev, "Failed to map PME interrupt.\n");
1194 res = devm_request_irq(hose->parent, pme_irq,
1199 dev_err(&dev->dev, "Unable to request irq %d for PME\n", pme_irq);
1200 irq_dispose_mapping(pme_irq);
1205 pci = hose->private_data;
1207 /* Enable PTOD, ENL23D & EXL23D */
1208 clrbits32(&pci->pex_pme_mes_disr,
1209 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1211 out_be32(&pci->pex_pme_mes_ier, 0);
1212 setbits32(&pci->pex_pme_mes_ier,
1213 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1216 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1217 pms |= PCI_PM_CTRL_PME_ENABLE;
1218 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1223 static void send_pme_turnoff_message(struct pci_controller *hose)
1225 struct ccsr_pci __iomem *pci = hose->private_data;
1229 /* Send PME_Turn_Off Message Request */
1230 setbits32(&pci->pex_pmcr, PEX_PMCR_PTOMR);
1232 /* Wait trun off done */
1233 for (i = 0; i < 150; i++) {
1234 dr = in_be32(&pci->pex_pme_mes_dr);
1236 out_be32(&pci->pex_pme_mes_dr, dr);
1244 static void fsl_pci_syscore_do_suspend(struct pci_controller *hose)
1246 send_pme_turnoff_message(hose);
1249 static int fsl_pci_syscore_suspend(void)
1251 struct pci_controller *hose, *tmp;
1253 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1254 fsl_pci_syscore_do_suspend(hose);
1259 static void fsl_pci_syscore_do_resume(struct pci_controller *hose)
1261 struct ccsr_pci __iomem *pci = hose->private_data;
1265 /* Send Exit L2 State Message */
1266 setbits32(&pci->pex_pmcr, PEX_PMCR_EXL2S);
1268 /* Wait exit done */
1269 for (i = 0; i < 150; i++) {
1270 dr = in_be32(&pci->pex_pme_mes_dr);
1272 out_be32(&pci->pex_pme_mes_dr, dr);
1279 setup_pci_atmu(hose);
1282 static void fsl_pci_syscore_resume(void)
1284 struct pci_controller *hose, *tmp;
1286 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1287 fsl_pci_syscore_do_resume(hose);
1290 static struct syscore_ops pci_syscore_pm_ops = {
1291 .suspend = fsl_pci_syscore_suspend,
1292 .resume = fsl_pci_syscore_resume,
1296 void fsl_pcibios_fixup_phb(struct pci_controller *phb)
1298 #ifdef CONFIG_PM_SLEEP
1299 fsl_pci_pme_probe(phb);
1303 static int add_err_dev(struct platform_device *pdev)
1305 struct platform_device *errdev;
1306 struct mpc85xx_edac_pci_plat_data pd = {
1307 .of_node = pdev->dev.of_node
1310 errdev = platform_device_register_resndata(&pdev->dev,
1312 PLATFORM_DEVID_AUTO,
1314 pdev->num_resources,
1317 return PTR_ERR(errdev);
1322 static int fsl_pci_probe(struct platform_device *pdev)
1324 struct device_node *node;
1327 node = pdev->dev.of_node;
1328 ret = fsl_add_bridge(pdev, fsl_pci_primary == node);
1332 ret = add_err_dev(pdev);
1334 dev_err(&pdev->dev, "couldn't register error device: %d\n",
1340 static struct platform_driver fsl_pci_driver = {
1343 .of_match_table = pci_ids,
1345 .probe = fsl_pci_probe,
1348 static int __init fsl_pci_init(void)
1350 #ifdef CONFIG_PM_SLEEP
1351 register_syscore_ops(&pci_syscore_pm_ops);
1353 return platform_driver_register(&fsl_pci_driver);
1355 arch_initcall(fsl_pci_init);