1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * MPC83xx/85xx/86xx PCI/PCIE support routing.
5 * Copyright 2007-2012 Freescale Semiconductor, Inc.
6 * Copyright 2008-2009 MontaVista Software, Inc.
8 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
9 * Recode: ZHANG WEI <wei.zhang@freescale.com>
10 * Rewrite the routing for Frescale PCI and PCI Express
11 * Roy Zang <tie-fei.zang@freescale.com>
12 * MPC83xx PCI-Express support:
13 * Tony Li <tony.li@freescale.com>
14 * Anton Vorontsov <avorontsov@ru.mvista.com>
16 #include <linux/kernel.h>
17 #include <linux/pci.h>
18 #include <linux/delay.h>
19 #include <linux/string.h>
20 #include <linux/fsl/edac.h>
21 #include <linux/init.h>
22 #include <linux/interrupt.h>
23 #include <linux/memblock.h>
24 #include <linux/log2.h>
25 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <linux/suspend.h>
28 #include <linux/syscore_ops.h>
29 #include <linux/uaccess.h>
33 #include <asm/pci-bridge.h>
34 #include <asm/ppc-pci.h>
35 #include <asm/machdep.h>
36 #include <asm/mpc85xx.h>
37 #include <asm/disassemble.h>
38 #include <asm/ppc-opcode.h>
39 #include <asm/swiotlb.h>
40 #include <sysdev/fsl_soc.h>
41 #include <sysdev/fsl_pci.h>
43 static int fsl_pcie_bus_fixup, is_mpc83xx_pci;
45 static void quirk_fsl_pcie_early(struct pci_dev *dev)
49 /* if we aren't a PCIe don't bother */
50 if (!pci_is_pcie(dev))
53 /* if we aren't in host mode don't bother */
54 pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type);
55 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
58 dev->class = PCI_CLASS_BRIDGE_PCI << 8;
59 fsl_pcie_bus_fixup = 1;
63 static int fsl_indirect_read_config(struct pci_bus *, unsigned int,
66 static int fsl_pcie_check_link(struct pci_controller *hose)
70 if (hose->indirect_type & PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK) {
71 if (hose->ops->read == fsl_indirect_read_config)
72 __indirect_read_config(hose, hose->first_busno, 0,
75 early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
76 if (val < PCIE_LTSSM_L0)
79 struct ccsr_pci __iomem *pci = hose->private_data;
80 /* for PCIe IP rev 3.0 or greater use CSR0 for link state */
81 val = (in_be32(&pci->pex_csr0) & PEX_CSR0_LTSSM_MASK)
82 >> PEX_CSR0_LTSSM_SHIFT;
83 if (val != PEX_CSR0_LTSSM_L0)
90 static int fsl_indirect_read_config(struct pci_bus *bus, unsigned int devfn,
91 int offset, int len, u32 *val)
93 struct pci_controller *hose = pci_bus_to_host(bus);
95 if (fsl_pcie_check_link(hose))
96 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
98 hose->indirect_type &= ~PPC_INDIRECT_TYPE_NO_PCIE_LINK;
100 return indirect_read_config(bus, devfn, offset, len, val);
103 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
105 static struct pci_ops fsl_indirect_pcie_ops =
107 .read = fsl_indirect_read_config,
108 .write = indirect_write_config,
111 static u64 pci64_dma_offset;
113 #ifdef CONFIG_SWIOTLB
114 static void pci_dma_dev_setup_swiotlb(struct pci_dev *pdev)
116 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
118 pdev->dev.bus_dma_limit =
119 hose->dma_window_base_cur + hose->dma_window_size - 1;
122 static void setup_swiotlb_ops(struct pci_controller *hose)
124 if (ppc_swiotlb_enable)
125 hose->controller_ops.dma_dev_setup = pci_dma_dev_setup_swiotlb;
128 static inline void setup_swiotlb_ops(struct pci_controller *hose) {}
131 static void fsl_pci_dma_set_mask(struct device *dev, u64 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 dev->bus_dma_limit = 0;
139 dev->archdata.dma_offset = pci64_dma_offset;
143 static int setup_one_atmu(struct ccsr_pci __iomem *pci,
144 unsigned int index, const struct resource *res,
145 resource_size_t offset)
147 resource_size_t pci_addr = res->start - offset;
148 resource_size_t phys_addr = res->start;
149 resource_size_t size = resource_size(res);
150 u32 flags = 0x80044000; /* enable & mem R/W */
153 pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
154 (u64)res->start, (u64)size);
156 if (res->flags & IORESOURCE_PREFETCH)
157 flags |= 0x10000000; /* enable relaxed ordering */
159 for (i = 0; size > 0; i++) {
160 unsigned int bits = min_t(u32, ilog2(size),
161 __ffs(pci_addr | phys_addr));
166 out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
167 out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
168 out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
169 out_be32(&pci->pow[index + i].powar, flags | (bits - 1));
171 pci_addr += (resource_size_t)1U << bits;
172 phys_addr += (resource_size_t)1U << bits;
173 size -= (resource_size_t)1U << bits;
179 static bool is_kdump(void)
181 struct device_node *node;
183 node = of_find_node_by_type(NULL, "memory");
189 return of_property_read_bool(node, "linux,usable-memory");
192 /* atmu setup for fsl pci/pcie controller */
193 static void setup_pci_atmu(struct pci_controller *hose)
195 struct ccsr_pci __iomem *pci = hose->private_data;
196 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
197 u64 mem, sz, paddr_hi = 0;
198 u64 offset = 0, paddr_lo = ULLONG_MAX;
199 u32 pcicsrbar = 0, pcicsrbar_sz;
200 u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
201 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
207 * If this is kdump, we don't want to trigger a bunch of PCI
208 * errors by closing the window on in-flight DMA.
210 * We still run most of the function's logic so that things like
211 * hose->dma_window_size still get set.
213 setup_inbound = !is_kdump();
215 if (of_device_is_compatible(hose->dn, "fsl,bsc9132-pcie")) {
217 * BSC9132 Rev1.0 has an issue where all the PEX inbound
218 * windows have implemented the default target value as 0xf
219 * for CCSR space.In all Freescale legacy devices the target
220 * of 0xf is reserved for local memory space. 9132 Rev1.0
221 * now has local mempry space mapped to target 0x0 instead of
222 * 0xf. Hence adding a workaround to remove the target 0xf
223 * defined for memory space from Inbound window attributes.
225 piwar &= ~PIWAR_TGI_LOCAL;
228 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
229 if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) {
236 /* Disable all windows (except powar0 since it's ignored) */
237 for(i = 1; i < 5; i++)
238 out_be32(&pci->pow[i].powar, 0);
241 for (i = start_idx; i < end_idx; i++)
242 out_be32(&pci->piw[i].piwar, 0);
245 /* Setup outbound MEM window */
246 for(i = 0, j = 1; i < 3; i++) {
247 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
250 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
251 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
253 /* We assume all memory resources have the same offset */
254 offset = hose->mem_offset[i];
255 n = setup_one_atmu(pci, j, &hose->mem_resources[i], offset);
257 if (n < 0 || j >= 5) {
258 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
259 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
264 /* Setup outbound IO window */
265 if (hose->io_resource.flags & IORESOURCE_IO) {
267 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
269 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
270 "phy base 0x%016llx.\n",
271 (u64)hose->io_resource.start,
272 (u64)resource_size(&hose->io_resource),
273 (u64)hose->io_base_phys);
274 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
275 out_be32(&pci->pow[j].potear, 0);
276 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
278 out_be32(&pci->pow[j].powar, 0x80088000
279 | (ilog2(hose->io_resource.end
280 - hose->io_resource.start + 1) - 1));
284 /* convert to pci address space */
288 if (paddr_hi == paddr_lo) {
289 pr_err("%pOF: No outbound window space\n", hose->dn);
294 pr_err("%pOF: No space for inbound window\n", hose->dn);
298 /* setup PCSRBAR/PEXCSRBAR */
299 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
300 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
301 pcicsrbar_sz = ~pcicsrbar_sz + 1;
303 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
304 (paddr_lo > 0x100000000ull))
305 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
307 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
308 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
310 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
312 pr_info("%pOF: PCICSRBAR @ 0x%x\n", hose->dn, pcicsrbar);
314 /* Setup inbound mem window */
315 mem = memblock_end_of_DRAM();
316 pr_info("%s: end of DRAM %llx\n", __func__, mem);
319 * The msi-address-64 property, if it exists, indicates the physical
320 * address of the MSIIR register. Normally, this register is located
321 * inside CCSR, so the ATMU that covers all of CCSR is used. But if
322 * this property exists, then we normally need to create a new ATMU
323 * for it. For now, however, we cheat. The only entity that creates
324 * this property is the Freescale hypervisor, and the address is
325 * specified in the partition configuration. Typically, the address
326 * is located in the page immediately after the end of DDR. If so, we
327 * can avoid allocating a new ATMU by extending the DDR ATMU by one
330 reg = of_get_property(hose->dn, "msi-address-64", &len);
331 if (reg && (len == sizeof(u64))) {
332 u64 address = be64_to_cpup(reg);
334 if ((address >= mem) && (address < (mem + PAGE_SIZE))) {
335 pr_info("%pOF: extending DDR ATMU to cover MSIIR", hose->dn);
338 /* TODO: Create a new ATMU for MSIIR */
339 pr_warn("%pOF: msi-address-64 address of %llx is "
340 "unsupported\n", hose->dn, address);
344 sz = min(mem, paddr_lo);
347 /* PCIe can overmap inbound & outbound since RX & TX are separated */
348 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
349 /* Size window to exact size if power-of-two or one size up */
350 if ((1ull << mem_log) != mem) {
352 if ((1ull << mem_log) > mem)
353 pr_info("%pOF: Setting PCI inbound window "
354 "greater than memory size\n", hose->dn);
357 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
360 /* Setup inbound memory window */
361 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
362 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
363 out_be32(&pci->piw[win_idx].piwar, piwar);
367 hose->dma_window_base_cur = 0x00000000;
368 hose->dma_window_size = (resource_size_t)sz;
371 * if we have >4G of memory setup second PCI inbound window to
372 * let devices that are 64-bit address capable to work w/o
373 * SWIOTLB and access the full range of memory
376 mem_log = ilog2(mem);
378 /* Size window up if we dont fit in exact power-of-2 */
379 if ((1ull << mem_log) != mem)
382 piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
383 pci64_dma_offset = 1ULL << mem_log;
386 /* Setup inbound memory window */
387 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
388 out_be32(&pci->piw[win_idx].piwbear,
389 pci64_dma_offset >> 44);
390 out_be32(&pci->piw[win_idx].piwbar,
391 pci64_dma_offset >> 12);
392 out_be32(&pci->piw[win_idx].piwar, piwar);
396 * install our own dma_set_mask handler to fixup dma_ops
399 ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
401 pr_info("%pOF: Setup 64-bit PCI DMA window\n", hose->dn);
407 /* Setup inbound memory window */
408 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
409 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
410 out_be32(&pci->piw[win_idx].piwar,
411 (piwar | (mem_log - 1)));
415 paddr += 1ull << mem_log;
416 sz -= 1ull << mem_log;
420 piwar |= (mem_log - 1);
423 out_be32(&pci->piw[win_idx].pitar,
425 out_be32(&pci->piw[win_idx].piwbar,
427 out_be32(&pci->piw[win_idx].piwar, piwar);
431 paddr += 1ull << mem_log;
434 hose->dma_window_base_cur = 0x00000000;
435 hose->dma_window_size = (resource_size_t)paddr;
438 if (hose->dma_window_size < mem) {
439 #ifdef CONFIG_SWIOTLB
440 ppc_swiotlb_enable = 1;
442 pr_err("%pOF: ERROR: Memory size exceeds PCI ATMU ability to "
443 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
446 /* adjusting outbound windows could reclaim space in mem map */
447 if (paddr_hi < 0xffffffffull)
448 pr_warn("%pOF: WARNING: Outbound window cfg leaves "
449 "gaps in memory map. Adjusting the memory map "
450 "could reduce unnecessary bounce buffering.\n",
453 pr_info("%pOF: DMA window size is 0x%llx\n", hose->dn,
454 (u64)hose->dma_window_size);
458 static void __init setup_pci_cmd(struct pci_controller *hose)
463 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
464 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
466 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
468 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
470 int pci_x_cmd = cap_x + PCI_X_CMD;
471 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
472 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
473 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
475 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
479 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
481 struct pci_controller *hose = pci_bus_to_host(bus);
482 int i, is_pcie = 0, no_link;
484 /* The root complex bridge comes up with bogus resources,
485 * we copy the PHB ones in.
487 * With the current generic PCI code, the PHB bus no longer
488 * has bus->resource[0..4] set, so things are a bit more
492 if (fsl_pcie_bus_fixup)
493 is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
494 no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
496 if (bus->parent == hose->bus && (is_pcie || no_link)) {
497 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
498 struct resource *res = bus->resource[i];
499 struct resource *par;
504 par = &hose->io_resource;
506 par = &hose->mem_resources[i-1];
509 res->start = par ? par->start : 0;
510 res->end = par ? par->end : 0;
511 res->flags = par ? par->flags : 0;
516 int fsl_add_bridge(struct platform_device *pdev, int is_primary)
519 struct pci_controller *hose;
520 struct resource rsrc;
521 const int *bus_range;
523 struct device_node *dev;
524 struct ccsr_pci __iomem *pci;
526 u32 svr = mfspr(SPRN_SVR);
528 dev = pdev->dev.of_node;
530 if (!of_device_is_available(dev)) {
531 pr_warn("%pOF: disabled\n", dev);
535 pr_debug("Adding PCI host bridge %pOF\n", dev);
537 /* Fetch host bridge registers address */
538 if (of_address_to_resource(dev, 0, &rsrc)) {
539 printk(KERN_WARNING "Can't get pci register base!");
543 /* Get bus range if any */
544 bus_range = of_get_property(dev, "bus-range", &len);
545 if (bus_range == NULL || len < 2 * sizeof(int))
546 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
549 pci_add_flags(PCI_REASSIGN_ALL_BUS);
550 hose = pcibios_alloc_controller(dev);
554 /* set platform device as the parent */
555 hose->parent = &pdev->dev;
556 hose->first_busno = bus_range ? bus_range[0] : 0x0;
557 hose->last_busno = bus_range ? bus_range[1] : 0xff;
559 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
560 (u64)rsrc.start, (u64)resource_size(&rsrc));
562 pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc));
563 if (!hose->private_data)
566 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
567 PPC_INDIRECT_TYPE_BIG_ENDIAN);
569 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0)
570 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
572 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
573 /* use fsl_indirect_read_config for PCIe */
574 hose->ops = &fsl_indirect_pcie_ops;
575 /* For PCIE read HEADER_TYPE to identify controller mode */
576 early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type);
577 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
581 /* For PCI read PROG to identify controller mode */
582 early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif);
584 !of_property_read_bool(dev, "fsl,pci-agent-force-enum"))
590 /* check PCI express link status */
591 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
592 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
593 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
594 if (fsl_pcie_check_link(hose))
595 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
598 * Set PBFR(PCI Bus Function Register)[10] = 1 to
599 * disable the combining of crossing cacheline
600 * boundary requests into one burst transaction.
601 * PCI-X operation is not affected.
602 * Fix erratum PCI 5 on MPC8548
604 #define PCI_BUS_FUNCTION 0x44
605 #define PCI_BUS_FUNCTION_MDS 0x400 /* Master disable streaming */
606 if (((SVR_SOC_VER(svr) == SVR_8543) ||
607 (SVR_SOC_VER(svr) == SVR_8545) ||
608 (SVR_SOC_VER(svr) == SVR_8547) ||
609 (SVR_SOC_VER(svr) == SVR_8548)) &&
610 !early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX)) {
611 early_read_config_word(hose, 0, 0,
612 PCI_BUS_FUNCTION, &temp);
613 temp |= PCI_BUS_FUNCTION_MDS;
614 early_write_config_word(hose, 0, 0,
615 PCI_BUS_FUNCTION, temp);
619 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
620 "Firmware bus number: %d->%d\n",
621 (unsigned long long)rsrc.start, hose->first_busno,
624 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
625 hose, hose->cfg_addr, hose->cfg_data);
627 /* Interpret the "ranges" property */
628 /* This also maps the I/O region and sets isa_io/mem_base */
629 pci_process_bridge_OF_ranges(hose, dev, is_primary);
631 /* Setup PEX window registers */
632 setup_pci_atmu(hose);
634 /* Set up controller operations */
635 setup_swiotlb_ops(hose);
640 iounmap(hose->private_data);
641 /* unmap cfg_data & cfg_addr separately if not on same page */
642 if (((unsigned long)hose->cfg_data & PAGE_MASK) !=
643 ((unsigned long)hose->cfg_addr & PAGE_MASK))
644 iounmap(hose->cfg_data);
645 iounmap(hose->cfg_addr);
646 pcibios_free_controller(hose);
649 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
651 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID,
652 quirk_fsl_pcie_early);
654 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
655 struct mpc83xx_pcie_priv {
656 void __iomem *cfg_type0;
657 void __iomem *cfg_type1;
661 struct pex_inbound_window {
669 * With the convention of u-boot, the PCIE outbound window 0 serves
670 * as configuration transactions outbound.
672 #define PEX_OUTWIN0_BAR 0xCA4
673 #define PEX_OUTWIN0_TAL 0xCA8
674 #define PEX_OUTWIN0_TAH 0xCAC
675 #define PEX_RC_INWIN_BASE 0xE60
676 #define PEX_RCIWARn_EN 0x1
678 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
680 struct pci_controller *hose = pci_bus_to_host(bus);
682 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
683 return PCIBIOS_DEVICE_NOT_FOUND;
685 * Workaround for the HW bug: for Type 0 configure transactions the
686 * PCI-E controller does not check the device number bits and just
687 * assumes that the device number bits are 0.
689 if (bus->number == hose->first_busno ||
690 bus->primary == hose->first_busno) {
692 return PCIBIOS_DEVICE_NOT_FOUND;
695 if (ppc_md.pci_exclude_device) {
696 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
697 return PCIBIOS_DEVICE_NOT_FOUND;
700 return PCIBIOS_SUCCESSFUL;
703 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
704 unsigned int devfn, int offset)
706 struct pci_controller *hose = pci_bus_to_host(bus);
707 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
708 u32 dev_base = bus->number << 24 | devfn << 16;
711 ret = mpc83xx_pcie_exclude_device(bus, devfn);
718 if (bus->number == hose->first_busno)
719 return pcie->cfg_type0 + offset;
721 if (pcie->dev_base == dev_base)
724 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
726 pcie->dev_base = dev_base;
728 return pcie->cfg_type1 + offset;
731 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
732 int offset, int len, u32 val)
734 struct pci_controller *hose = pci_bus_to_host(bus);
736 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
737 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
740 return pci_generic_config_write(bus, devfn, offset, len, val);
743 static struct pci_ops mpc83xx_pcie_ops = {
744 .map_bus = mpc83xx_pcie_remap_cfg,
745 .read = pci_generic_config_read,
746 .write = mpc83xx_pcie_write_config,
749 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
750 struct resource *reg)
752 struct mpc83xx_pcie_priv *pcie;
756 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
760 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
761 if (!pcie->cfg_type0)
764 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
766 /* PCI-E isn't configured. */
771 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
772 if (!pcie->cfg_type1)
775 WARN_ON(hose->dn->data);
776 hose->dn->data = pcie;
777 hose->ops = &mpc83xx_pcie_ops;
778 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
780 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
781 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
783 if (fsl_pcie_check_link(hose))
784 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
788 iounmap(pcie->cfg_type0);
795 int __init mpc83xx_add_bridge(struct device_node *dev)
799 struct pci_controller *hose;
800 struct resource rsrc_reg;
801 struct resource rsrc_cfg;
802 const int *bus_range;
807 if (!of_device_is_available(dev)) {
808 pr_warn("%pOF: disabled by the firmware.\n",
812 pr_debug("Adding PCI host bridge %pOF\n", dev);
814 /* Fetch host bridge registers address */
815 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
816 printk(KERN_WARNING "Can't get pci register base!\n");
820 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
822 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
824 "No pci config register base in dev tree, "
827 * MPC83xx supports up to two host controllers
828 * one at 0x8500 has config space registers at 0x8300
829 * one at 0x8600 has config space registers at 0x8380
831 if ((rsrc_reg.start & 0xfffff) == 0x8500)
832 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
833 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
834 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
837 * Controller at offset 0x8500 is primary
839 if ((rsrc_reg.start & 0xfffff) == 0x8500)
844 /* Get bus range if any */
845 bus_range = of_get_property(dev, "bus-range", &len);
846 if (bus_range == NULL || len < 2 * sizeof(int)) {
847 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
851 pci_add_flags(PCI_REASSIGN_ALL_BUS);
852 hose = pcibios_alloc_controller(dev);
856 hose->first_busno = bus_range ? bus_range[0] : 0;
857 hose->last_busno = bus_range ? bus_range[1] : 0xff;
859 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
860 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
864 setup_indirect_pci(hose, rsrc_cfg.start,
865 rsrc_cfg.start + 4, 0);
868 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
869 "Firmware bus number: %d->%d\n",
870 (unsigned long long)rsrc_reg.start, hose->first_busno,
873 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
874 hose, hose->cfg_addr, hose->cfg_data);
876 /* Interpret the "ranges" property */
877 /* This also maps the I/O region and sets isa_io/mem_base */
878 pci_process_bridge_OF_ranges(hose, dev, primary);
882 pcibios_free_controller(hose);
885 #endif /* CONFIG_PPC_83xx */
887 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
889 #ifdef CONFIG_PPC_83xx
890 if (is_mpc83xx_pci) {
891 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
892 struct pex_inbound_window *in;
895 /* Walk the Root Complex Inbound windows to match IMMR base */
896 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
897 for (i = 0; i < 4; i++) {
898 /* not enabled, skip */
899 if (!(in_le32(&in[i].ar) & PEX_RCIWARn_EN))
902 if (get_immrbase() == in_le32(&in[i].tar))
903 return (u64)in_le32(&in[i].barh) << 32 |
904 in_le32(&in[i].barl);
907 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
911 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
912 if (!is_mpc83xx_pci) {
915 pci_bus_read_config_dword(hose->bus,
916 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
919 * For PEXCSRBAR, bit 3-0 indicate prefetchable and
920 * address type. So when getting base address, these
921 * bits should be masked
923 base &= PCI_BASE_ADDRESS_MEM_MASK;
933 static int mcheck_handle_load(struct pt_regs *regs, u32 inst)
935 unsigned int rd, ra, rb, d;
942 switch (get_op(inst)) {
944 switch (get_xop(inst)) {
946 case OP_31_XOP_LWBRX:
947 regs->gpr[rd] = 0xffffffff;
950 case OP_31_XOP_LWZUX:
951 regs->gpr[rd] = 0xffffffff;
952 regs->gpr[ra] += regs->gpr[rb];
956 regs->gpr[rd] = 0xff;
959 case OP_31_XOP_LBZUX:
960 regs->gpr[rd] = 0xff;
961 regs->gpr[ra] += regs->gpr[rb];
965 case OP_31_XOP_LHBRX:
966 regs->gpr[rd] = 0xffff;
969 case OP_31_XOP_LHZUX:
970 regs->gpr[rd] = 0xffff;
971 regs->gpr[ra] += regs->gpr[rb];
975 regs->gpr[rd] = ~0UL;
978 case OP_31_XOP_LHAUX:
979 regs->gpr[rd] = ~0UL;
980 regs->gpr[ra] += regs->gpr[rb];
989 regs->gpr[rd] = 0xffffffff;
993 regs->gpr[rd] = 0xffffffff;
994 regs->gpr[ra] += (s16)d;
998 regs->gpr[rd] = 0xff;
1002 regs->gpr[rd] = 0xff;
1003 regs->gpr[ra] += (s16)d;
1007 regs->gpr[rd] = 0xffff;
1011 regs->gpr[rd] = 0xffff;
1012 regs->gpr[ra] += (s16)d;
1016 regs->gpr[rd] = ~0UL;
1020 regs->gpr[rd] = ~0UL;
1021 regs->gpr[ra] += (s16)d;
1031 static int is_in_pci_mem_space(phys_addr_t addr)
1033 struct pci_controller *hose;
1034 struct resource *res;
1037 list_for_each_entry(hose, &hose_list, list_node) {
1038 if (!(hose->indirect_type & PPC_INDIRECT_TYPE_EXT_REG))
1041 for (i = 0; i < 3; i++) {
1042 res = &hose->mem_resources[i];
1043 if ((res->flags & IORESOURCE_MEM) &&
1044 addr >= res->start && addr <= res->end)
1051 int fsl_pci_mcheck_exception(struct pt_regs *regs)
1055 phys_addr_t addr = 0;
1057 /* Let KVM/QEMU deal with the exception */
1058 if (regs->msr & MSR_GS)
1061 #ifdef CONFIG_PHYS_64BIT
1062 addr = mfspr(SPRN_MCARU);
1065 addr += mfspr(SPRN_MCAR);
1067 if (is_in_pci_mem_space(addr)) {
1068 if (user_mode(regs))
1069 ret = probe_user_read(&inst, (void __user *)regs->nip,
1072 ret = probe_kernel_address((void *)regs->nip, inst);
1074 if (!ret && mcheck_handle_load(regs, inst)) {
1084 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
1085 static const struct of_device_id pci_ids[] = {
1086 { .compatible = "fsl,mpc8540-pci", },
1087 { .compatible = "fsl,mpc8548-pcie", },
1088 { .compatible = "fsl,mpc8610-pci", },
1089 { .compatible = "fsl,mpc8641-pcie", },
1090 { .compatible = "fsl,qoriq-pcie", },
1091 { .compatible = "fsl,qoriq-pcie-v2.1", },
1092 { .compatible = "fsl,qoriq-pcie-v2.2", },
1093 { .compatible = "fsl,qoriq-pcie-v2.3", },
1094 { .compatible = "fsl,qoriq-pcie-v2.4", },
1095 { .compatible = "fsl,qoriq-pcie-v3.0", },
1098 * The following entries are for compatibility with older device
1101 { .compatible = "fsl,p1022-pcie", },
1102 { .compatible = "fsl,p4080-pcie", },
1107 struct device_node *fsl_pci_primary;
1109 void fsl_pci_assign_primary(void)
1111 struct device_node *np;
1113 /* Callers can specify the primary bus using other means. */
1114 if (fsl_pci_primary)
1117 /* If a PCI host bridge contains an ISA node, it's primary. */
1118 np = of_find_node_by_type(NULL, "isa");
1119 while ((fsl_pci_primary = of_get_parent(np))) {
1121 np = fsl_pci_primary;
1123 if (of_match_node(pci_ids, np) && of_device_is_available(np))
1128 * If there's no PCI host bridge with ISA, arbitrarily
1129 * designate one as primary. This can go away once
1130 * various bugs with primary-less systems are fixed.
1132 for_each_matching_node(np, pci_ids) {
1133 if (of_device_is_available(np)) {
1134 fsl_pci_primary = np;
1141 #ifdef CONFIG_PM_SLEEP
1142 static irqreturn_t fsl_pci_pme_handle(int irq, void *dev_id)
1144 struct pci_controller *hose = dev_id;
1145 struct ccsr_pci __iomem *pci = hose->private_data;
1148 dr = in_be32(&pci->pex_pme_mes_dr);
1152 out_be32(&pci->pex_pme_mes_dr, dr);
1157 static int fsl_pci_pme_probe(struct pci_controller *hose)
1159 struct ccsr_pci __iomem *pci;
1160 struct pci_dev *dev;
1165 /* Get hose's pci_dev */
1166 dev = list_first_entry(&hose->bus->devices, typeof(*dev), bus_list);
1169 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1170 pms &= ~PCI_PM_CTRL_PME_ENABLE;
1171 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1173 pme_irq = irq_of_parse_and_map(hose->dn, 0);
1175 dev_err(&dev->dev, "Failed to map PME interrupt.\n");
1180 res = devm_request_irq(hose->parent, pme_irq,
1185 dev_err(&dev->dev, "Unable to request irq %d for PME\n", pme_irq);
1186 irq_dispose_mapping(pme_irq);
1191 pci = hose->private_data;
1193 /* Enable PTOD, ENL23D & EXL23D */
1194 clrbits32(&pci->pex_pme_mes_disr,
1195 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1197 out_be32(&pci->pex_pme_mes_ier, 0);
1198 setbits32(&pci->pex_pme_mes_ier,
1199 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1202 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1203 pms |= PCI_PM_CTRL_PME_ENABLE;
1204 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1209 static void send_pme_turnoff_message(struct pci_controller *hose)
1211 struct ccsr_pci __iomem *pci = hose->private_data;
1215 /* Send PME_Turn_Off Message Request */
1216 setbits32(&pci->pex_pmcr, PEX_PMCR_PTOMR);
1218 /* Wait trun off done */
1219 for (i = 0; i < 150; i++) {
1220 dr = in_be32(&pci->pex_pme_mes_dr);
1222 out_be32(&pci->pex_pme_mes_dr, dr);
1230 static void fsl_pci_syscore_do_suspend(struct pci_controller *hose)
1232 send_pme_turnoff_message(hose);
1235 static int fsl_pci_syscore_suspend(void)
1237 struct pci_controller *hose, *tmp;
1239 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1240 fsl_pci_syscore_do_suspend(hose);
1245 static void fsl_pci_syscore_do_resume(struct pci_controller *hose)
1247 struct ccsr_pci __iomem *pci = hose->private_data;
1251 /* Send Exit L2 State Message */
1252 setbits32(&pci->pex_pmcr, PEX_PMCR_EXL2S);
1254 /* Wait exit done */
1255 for (i = 0; i < 150; i++) {
1256 dr = in_be32(&pci->pex_pme_mes_dr);
1258 out_be32(&pci->pex_pme_mes_dr, dr);
1265 setup_pci_atmu(hose);
1268 static void fsl_pci_syscore_resume(void)
1270 struct pci_controller *hose, *tmp;
1272 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1273 fsl_pci_syscore_do_resume(hose);
1276 static struct syscore_ops pci_syscore_pm_ops = {
1277 .suspend = fsl_pci_syscore_suspend,
1278 .resume = fsl_pci_syscore_resume,
1282 void fsl_pcibios_fixup_phb(struct pci_controller *phb)
1284 #ifdef CONFIG_PM_SLEEP
1285 fsl_pci_pme_probe(phb);
1289 static int add_err_dev(struct platform_device *pdev)
1291 struct platform_device *errdev;
1292 struct mpc85xx_edac_pci_plat_data pd = {
1293 .of_node = pdev->dev.of_node
1296 errdev = platform_device_register_resndata(&pdev->dev,
1298 PLATFORM_DEVID_AUTO,
1300 pdev->num_resources,
1303 return PTR_ERR_OR_ZERO(errdev);
1306 static int fsl_pci_probe(struct platform_device *pdev)
1308 struct device_node *node;
1311 node = pdev->dev.of_node;
1312 ret = fsl_add_bridge(pdev, fsl_pci_primary == node);
1316 ret = add_err_dev(pdev);
1318 dev_err(&pdev->dev, "couldn't register error device: %d\n",
1324 static struct platform_driver fsl_pci_driver = {
1327 .of_match_table = pci_ids,
1329 .probe = fsl_pci_probe,
1332 static int __init fsl_pci_init(void)
1334 #ifdef CONFIG_PM_SLEEP
1335 register_syscore_ops(&pci_syscore_pm_ops);
1337 return platform_driver_register(&fsl_pci_driver);
1339 arch_initcall(fsl_pci_init);