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.
10 * Rewrite the routing for Frescale PCI and PCI Express
12 * MPC83xx PCI-Express support:
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/of_address.h>
26 #include <linux/of_irq.h>
27 #include <linux/platform_device.h>
28 #include <linux/slab.h>
29 #include <linux/suspend.h>
30 #include <linux/syscore_ops.h>
31 #include <linux/uaccess.h>
34 #include <asm/pci-bridge.h>
35 #include <asm/ppc-pci.h>
36 #include <asm/machdep.h>
37 #include <asm/mpc85xx.h>
38 #include <asm/disassemble.h>
39 #include <asm/ppc-opcode.h>
40 #include <asm/swiotlb.h>
41 #include <asm/setup.h>
42 #include <sysdev/fsl_soc.h>
43 #include <sysdev/fsl_pci.h>
45 static int fsl_pcie_bus_fixup, is_mpc83xx_pci;
47 static void quirk_fsl_pcie_early(struct pci_dev *dev)
51 /* if we aren't a PCIe don't bother */
52 if (!pci_is_pcie(dev))
55 /* if we aren't in host mode don't bother */
56 pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type);
57 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
60 dev->class = PCI_CLASS_BRIDGE_PCI_NORMAL;
61 fsl_pcie_bus_fixup = 1;
65 static int fsl_indirect_read_config(struct pci_bus *, unsigned int,
68 static int fsl_pcie_check_link(struct pci_controller *hose)
72 if (hose->indirect_type & PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK) {
73 if (hose->ops->read == fsl_indirect_read_config)
74 __indirect_read_config(hose, hose->first_busno, 0,
77 early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
78 if (val < PCIE_LTSSM_L0)
81 struct ccsr_pci __iomem *pci = hose->private_data;
82 /* for PCIe IP rev 3.0 or greater use CSR0 for link state */
83 val = (in_be32(&pci->pex_csr0) & PEX_CSR0_LTSSM_MASK)
84 >> PEX_CSR0_LTSSM_SHIFT;
85 if (val != PEX_CSR0_LTSSM_L0)
92 static int fsl_indirect_read_config(struct pci_bus *bus, unsigned int devfn,
93 int offset, int len, u32 *val)
95 struct pci_controller *hose = pci_bus_to_host(bus);
97 if (fsl_pcie_check_link(hose))
98 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
100 hose->indirect_type &= ~PPC_INDIRECT_TYPE_NO_PCIE_LINK;
102 return indirect_read_config(bus, devfn, offset, len, val);
105 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
107 static struct pci_ops fsl_indirect_pcie_ops =
109 .read = fsl_indirect_read_config,
110 .write = indirect_write_config,
113 static u64 pci64_dma_offset;
115 #ifdef CONFIG_SWIOTLB
116 static void pci_dma_dev_setup_swiotlb(struct pci_dev *pdev)
118 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
120 pdev->dev.bus_dma_limit =
121 hose->dma_window_base_cur + hose->dma_window_size - 1;
124 static void setup_swiotlb_ops(struct pci_controller *hose)
126 if (ppc_swiotlb_enable)
127 hose->controller_ops.dma_dev_setup = pci_dma_dev_setup_swiotlb;
130 static inline void setup_swiotlb_ops(struct pci_controller *hose) {}
133 static void fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
136 * Fix up PCI devices that are able to DMA to the large inbound
137 * mapping that allows addressing any RAM address from across PCI.
139 if (dev_is_pci(dev) && dma_mask >= pci64_dma_offset * 2 - 1) {
140 dev->bus_dma_limit = 0;
141 dev->archdata.dma_offset = pci64_dma_offset;
145 static int setup_one_atmu(struct ccsr_pci __iomem *pci,
146 unsigned int index, const struct resource *res,
147 resource_size_t offset)
149 resource_size_t pci_addr = res->start - offset;
150 resource_size_t phys_addr = res->start;
151 resource_size_t size = resource_size(res);
152 u32 flags = 0x80044000; /* enable & mem R/W */
155 pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
156 (u64)res->start, (u64)size);
158 if (res->flags & IORESOURCE_PREFETCH)
159 flags |= 0x10000000; /* enable relaxed ordering */
161 for (i = 0; size > 0; i++) {
162 unsigned int bits = min_t(u32, ilog2(size),
163 __ffs(pci_addr | phys_addr));
168 out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
169 out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
170 out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
171 out_be32(&pci->pow[index + i].powar, flags | (bits - 1));
173 pci_addr += (resource_size_t)1U << bits;
174 phys_addr += (resource_size_t)1U << bits;
175 size -= (resource_size_t)1U << bits;
181 static bool is_kdump(void)
183 struct device_node *node;
185 node = of_find_node_by_type(NULL, "memory");
191 return of_property_read_bool(node, "linux,usable-memory");
194 /* atmu setup for fsl pci/pcie controller */
195 static void setup_pci_atmu(struct pci_controller *hose)
197 struct ccsr_pci __iomem *pci = hose->private_data;
198 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
199 u64 mem, sz, paddr_hi = 0;
200 u64 offset = 0, paddr_lo = ULLONG_MAX;
201 u32 pcicsrbar = 0, pcicsrbar_sz;
202 u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
203 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
209 * If this is kdump, we don't want to trigger a bunch of PCI
210 * errors by closing the window on in-flight DMA.
212 * We still run most of the function's logic so that things like
213 * hose->dma_window_size still get set.
215 setup_inbound = !is_kdump();
217 if (of_device_is_compatible(hose->dn, "fsl,bsc9132-pcie")) {
219 * BSC9132 Rev1.0 has an issue where all the PEX inbound
220 * windows have implemented the default target value as 0xf
221 * for CCSR space.In all Freescale legacy devices the target
222 * of 0xf is reserved for local memory space. 9132 Rev1.0
223 * now has local memory space mapped to target 0x0 instead of
224 * 0xf. Hence adding a workaround to remove the target 0xf
225 * defined for memory space from Inbound window attributes.
227 piwar &= ~PIWAR_TGI_LOCAL;
230 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
231 if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) {
238 /* Disable all windows (except powar0 since it's ignored) */
239 for(i = 1; i < 5; i++)
240 out_be32(&pci->pow[i].powar, 0);
243 for (i = start_idx; i < end_idx; i++)
244 out_be32(&pci->piw[i].piwar, 0);
247 /* Setup outbound MEM window */
248 for(i = 0, j = 1; i < 3; i++) {
249 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
252 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
253 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
255 /* We assume all memory resources have the same offset */
256 offset = hose->mem_offset[i];
257 n = setup_one_atmu(pci, j, &hose->mem_resources[i], offset);
259 if (n < 0 || j >= 5) {
260 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
261 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
266 /* Setup outbound IO window */
267 if (hose->io_resource.flags & IORESOURCE_IO) {
269 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
271 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
272 "phy base 0x%016llx.\n",
273 (u64)hose->io_resource.start,
274 (u64)resource_size(&hose->io_resource),
275 (u64)hose->io_base_phys);
276 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
277 out_be32(&pci->pow[j].potear, 0);
278 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
280 out_be32(&pci->pow[j].powar, 0x80088000
281 | (ilog2(hose->io_resource.end
282 - hose->io_resource.start + 1) - 1));
286 /* convert to pci address space */
290 if (paddr_hi == paddr_lo) {
291 pr_err("%pOF: No outbound window space\n", hose->dn);
296 pr_err("%pOF: No space for inbound window\n", hose->dn);
300 /* setup PCSRBAR/PEXCSRBAR */
301 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
302 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
303 pcicsrbar_sz = ~pcicsrbar_sz + 1;
305 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
306 (paddr_lo > 0x100000000ull))
307 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
309 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
310 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
312 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
314 pr_info("%pOF: PCICSRBAR @ 0x%x\n", hose->dn, pcicsrbar);
316 /* Setup inbound mem window */
317 mem = memblock_end_of_DRAM();
318 pr_info("%s: end of DRAM %llx\n", __func__, mem);
321 * The msi-address-64 property, if it exists, indicates the physical
322 * address of the MSIIR register. Normally, this register is located
323 * inside CCSR, so the ATMU that covers all of CCSR is used. But if
324 * this property exists, then we normally need to create a new ATMU
325 * for it. For now, however, we cheat. The only entity that creates
326 * this property is the Freescale hypervisor, and the address is
327 * specified in the partition configuration. Typically, the address
328 * is located in the page immediately after the end of DDR. If so, we
329 * can avoid allocating a new ATMU by extending the DDR ATMU by one
332 reg = of_get_property(hose->dn, "msi-address-64", &len);
333 if (reg && (len == sizeof(u64))) {
334 u64 address = be64_to_cpup(reg);
336 if ((address >= mem) && (address < (mem + PAGE_SIZE))) {
337 pr_info("%pOF: extending DDR ATMU to cover MSIIR", hose->dn);
340 /* TODO: Create a new ATMU for MSIIR */
341 pr_warn("%pOF: msi-address-64 address of %llx is "
342 "unsupported\n", hose->dn, address);
346 sz = min(mem, paddr_lo);
349 /* PCIe can overmap inbound & outbound since RX & TX are separated */
350 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
351 /* Size window to exact size if power-of-two or one size up */
352 if ((1ull << mem_log) != mem) {
354 if ((1ull << mem_log) > mem)
355 pr_info("%pOF: Setting PCI inbound window "
356 "greater than memory size\n", hose->dn);
359 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
362 /* Setup inbound memory window */
363 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
364 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
365 out_be32(&pci->piw[win_idx].piwar, piwar);
369 hose->dma_window_base_cur = 0x00000000;
370 hose->dma_window_size = (resource_size_t)sz;
373 * if we have >4G of memory setup second PCI inbound window to
374 * let devices that are 64-bit address capable to work w/o
375 * SWIOTLB and access the full range of memory
378 mem_log = ilog2(mem);
380 /* Size window up if we dont fit in exact power-of-2 */
381 if ((1ull << mem_log) != mem)
384 piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
385 pci64_dma_offset = 1ULL << mem_log;
388 /* Setup inbound memory window */
389 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
390 out_be32(&pci->piw[win_idx].piwbear,
391 pci64_dma_offset >> 44);
392 out_be32(&pci->piw[win_idx].piwbar,
393 pci64_dma_offset >> 12);
394 out_be32(&pci->piw[win_idx].piwar, piwar);
398 * install our own dma_set_mask handler to fixup dma_ops
401 ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
403 pr_info("%pOF: Setup 64-bit PCI DMA window\n", hose->dn);
409 /* Setup inbound memory window */
410 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
411 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
412 out_be32(&pci->piw[win_idx].piwar,
413 (piwar | (mem_log - 1)));
417 paddr += 1ull << mem_log;
418 sz -= 1ull << mem_log;
422 piwar |= (mem_log - 1);
425 out_be32(&pci->piw[win_idx].pitar,
427 out_be32(&pci->piw[win_idx].piwbar,
429 out_be32(&pci->piw[win_idx].piwar, piwar);
433 paddr += 1ull << mem_log;
436 hose->dma_window_base_cur = 0x00000000;
437 hose->dma_window_size = (resource_size_t)paddr;
440 if (hose->dma_window_size < mem) {
441 #ifdef CONFIG_SWIOTLB
442 ppc_swiotlb_enable = 1;
444 pr_err("%pOF: ERROR: Memory size exceeds PCI ATMU ability to "
445 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
448 /* adjusting outbound windows could reclaim space in mem map */
449 if (paddr_hi < 0xffffffffull)
450 pr_warn("%pOF: WARNING: Outbound window cfg leaves "
451 "gaps in memory map. Adjusting the memory map "
452 "could reduce unnecessary bounce buffering.\n",
455 pr_info("%pOF: DMA window size is 0x%llx\n", hose->dn,
456 (u64)hose->dma_window_size);
460 static void setup_pci_cmd(struct pci_controller *hose)
465 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
466 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
468 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
470 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
472 int pci_x_cmd = cap_x + PCI_X_CMD;
473 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
474 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
475 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
477 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
481 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
483 struct pci_controller *hose = pci_bus_to_host(bus);
484 int i, is_pcie = 0, no_link;
486 /* The root complex bridge comes up with bogus resources,
487 * we copy the PHB ones in.
489 * With the current generic PCI code, the PHB bus no longer
490 * has bus->resource[0..4] set, so things are a bit more
494 if (fsl_pcie_bus_fixup)
495 is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
496 no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
498 if (bus->parent == hose->bus && (is_pcie || no_link)) {
499 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
500 struct resource *res = bus->resource[i];
501 struct resource *par;
506 par = &hose->io_resource;
508 par = &hose->mem_resources[i-1];
511 res->start = par ? par->start : 0;
512 res->end = par ? par->end : 0;
513 res->flags = par ? par->flags : 0;
518 int fsl_add_bridge(struct platform_device *pdev, int is_primary)
521 struct pci_controller *hose;
522 struct resource rsrc;
523 const int *bus_range;
526 struct device_node *dev;
527 struct ccsr_pci __iomem *pci;
529 u32 svr = mfspr(SPRN_SVR);
531 dev = pdev->dev.of_node;
533 if (!of_device_is_available(dev)) {
534 pr_warn("%pOF: disabled\n", dev);
538 pr_debug("Adding PCI host bridge %pOF\n", dev);
540 /* Fetch host bridge registers address */
541 if (of_address_to_resource(dev, 0, &rsrc)) {
542 printk(KERN_WARNING "Can't get pci register base!");
546 /* Get bus range if any */
547 bus_range = of_get_property(dev, "bus-range", &len);
548 if (bus_range == NULL || len < 2 * sizeof(int))
549 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
552 pci_add_flags(PCI_REASSIGN_ALL_BUS);
553 hose = pcibios_alloc_controller(dev);
557 /* set platform device as the parent */
558 hose->parent = &pdev->dev;
559 hose->first_busno = bus_range ? bus_range[0] : 0x0;
560 hose->last_busno = bus_range ? bus_range[1] : 0xff;
562 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
563 (u64)rsrc.start, (u64)resource_size(&rsrc));
565 pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc));
566 if (!hose->private_data)
569 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
570 PPC_INDIRECT_TYPE_BIG_ENDIAN);
572 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0)
573 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
575 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
576 /* use fsl_indirect_read_config for PCIe */
577 hose->ops = &fsl_indirect_pcie_ops;
578 /* For PCIE read HEADER_TYPE to identify controller mode */
579 early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type);
580 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
584 /* For PCI read PROG to identify controller mode */
585 early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif);
587 !of_property_read_bool(dev, "fsl,pci-agent-force-enum"))
593 /* check PCI express link status */
594 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
595 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
596 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
597 if (fsl_pcie_check_link(hose))
598 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
599 /* Fix Class Code to PCI_CLASS_BRIDGE_PCI_NORMAL for pre-3.0 controller */
600 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0) {
601 early_read_config_dword(hose, 0, 0, PCIE_FSL_CSR_CLASSCODE, &class_code);
603 class_code |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
604 early_write_config_dword(hose, 0, 0, PCIE_FSL_CSR_CLASSCODE, class_code);
608 * Set PBFR(PCI Bus Function Register)[10] = 1 to
609 * disable the combining of crossing cacheline
610 * boundary requests into one burst transaction.
611 * PCI-X operation is not affected.
612 * Fix erratum PCI 5 on MPC8548
614 #define PCI_BUS_FUNCTION 0x44
615 #define PCI_BUS_FUNCTION_MDS 0x400 /* Master disable streaming */
616 if (((SVR_SOC_VER(svr) == SVR_8543) ||
617 (SVR_SOC_VER(svr) == SVR_8545) ||
618 (SVR_SOC_VER(svr) == SVR_8547) ||
619 (SVR_SOC_VER(svr) == SVR_8548)) &&
620 !early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX)) {
621 early_read_config_word(hose, 0, 0,
622 PCI_BUS_FUNCTION, &temp);
623 temp |= PCI_BUS_FUNCTION_MDS;
624 early_write_config_word(hose, 0, 0,
625 PCI_BUS_FUNCTION, temp);
629 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
630 "Firmware bus number: %d->%d\n",
631 (unsigned long long)rsrc.start, hose->first_busno,
634 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
635 hose, hose->cfg_addr, hose->cfg_data);
637 /* Interpret the "ranges" property */
638 /* This also maps the I/O region and sets isa_io/mem_base */
639 pci_process_bridge_OF_ranges(hose, dev, is_primary);
641 /* Setup PEX window registers */
642 setup_pci_atmu(hose);
644 /* Set up controller operations */
645 setup_swiotlb_ops(hose);
650 iounmap(hose->private_data);
651 /* unmap cfg_data & cfg_addr separately if not on same page */
652 if (((unsigned long)hose->cfg_data & PAGE_MASK) !=
653 ((unsigned long)hose->cfg_addr & PAGE_MASK))
654 iounmap(hose->cfg_data);
655 iounmap(hose->cfg_addr);
656 pcibios_free_controller(hose);
659 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
661 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID,
662 quirk_fsl_pcie_early);
664 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
665 struct mpc83xx_pcie_priv {
666 void __iomem *cfg_type0;
667 void __iomem *cfg_type1;
671 struct pex_inbound_window {
679 * With the convention of u-boot, the PCIE outbound window 0 serves
680 * as configuration transactions outbound.
682 #define PEX_OUTWIN0_BAR 0xCA4
683 #define PEX_OUTWIN0_TAL 0xCA8
684 #define PEX_OUTWIN0_TAH 0xCAC
685 #define PEX_RC_INWIN_BASE 0xE60
686 #define PEX_RCIWARn_EN 0x1
688 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
690 struct pci_controller *hose = pci_bus_to_host(bus);
692 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
693 return PCIBIOS_DEVICE_NOT_FOUND;
695 * Workaround for the HW bug: for Type 0 configure transactions the
696 * PCI-E controller does not check the device number bits and just
697 * assumes that the device number bits are 0.
699 if (bus->number == hose->first_busno ||
700 bus->primary == hose->first_busno) {
702 return PCIBIOS_DEVICE_NOT_FOUND;
705 if (ppc_md.pci_exclude_device) {
706 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
707 return PCIBIOS_DEVICE_NOT_FOUND;
710 return PCIBIOS_SUCCESSFUL;
713 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
714 unsigned int devfn, int offset)
716 struct pci_controller *hose = pci_bus_to_host(bus);
717 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
718 u32 dev_base = bus->number << 24 | devfn << 16;
721 ret = mpc83xx_pcie_exclude_device(bus, devfn);
728 if (bus->number == hose->first_busno)
729 return pcie->cfg_type0 + offset;
731 if (pcie->dev_base == dev_base)
734 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
736 pcie->dev_base = dev_base;
738 return pcie->cfg_type1 + offset;
741 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
742 int offset, int len, u32 val)
744 struct pci_controller *hose = pci_bus_to_host(bus);
746 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
747 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
750 return pci_generic_config_write(bus, devfn, offset, len, val);
753 static struct pci_ops mpc83xx_pcie_ops = {
754 .map_bus = mpc83xx_pcie_remap_cfg,
755 .read = pci_generic_config_read,
756 .write = mpc83xx_pcie_write_config,
759 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
760 struct resource *reg)
762 struct mpc83xx_pcie_priv *pcie;
766 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
770 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
771 if (!pcie->cfg_type0)
774 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
776 /* PCI-E isn't configured. */
781 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
782 if (!pcie->cfg_type1)
785 WARN_ON(hose->dn->data);
786 hose->dn->data = pcie;
787 hose->ops = &mpc83xx_pcie_ops;
788 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
790 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
791 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
793 if (fsl_pcie_check_link(hose))
794 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
798 iounmap(pcie->cfg_type0);
805 int __init mpc83xx_add_bridge(struct device_node *dev)
809 struct pci_controller *hose;
810 struct resource rsrc_reg;
811 struct resource rsrc_cfg;
812 const int *bus_range;
817 if (!of_device_is_available(dev)) {
818 pr_warn("%pOF: disabled by the firmware.\n",
822 pr_debug("Adding PCI host bridge %pOF\n", dev);
824 /* Fetch host bridge registers address */
825 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
826 printk(KERN_WARNING "Can't get pci register base!\n");
830 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
832 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
834 "No pci config register base in dev tree, "
837 * MPC83xx supports up to two host controllers
838 * one at 0x8500 has config space registers at 0x8300
839 * one at 0x8600 has config space registers at 0x8380
841 if ((rsrc_reg.start & 0xfffff) == 0x8500)
842 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
843 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
844 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
847 * Controller at offset 0x8500 is primary
849 if ((rsrc_reg.start & 0xfffff) == 0x8500)
854 /* Get bus range if any */
855 bus_range = of_get_property(dev, "bus-range", &len);
856 if (bus_range == NULL || len < 2 * sizeof(int)) {
857 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
861 pci_add_flags(PCI_REASSIGN_ALL_BUS);
862 hose = pcibios_alloc_controller(dev);
866 hose->first_busno = bus_range ? bus_range[0] : 0;
867 hose->last_busno = bus_range ? bus_range[1] : 0xff;
869 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
870 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
874 setup_indirect_pci(hose, rsrc_cfg.start,
875 rsrc_cfg.start + 4, 0);
878 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
879 "Firmware bus number: %d->%d\n",
880 (unsigned long long)rsrc_reg.start, hose->first_busno,
883 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
884 hose, hose->cfg_addr, hose->cfg_data);
886 /* Interpret the "ranges" property */
887 /* This also maps the I/O region and sets isa_io/mem_base */
888 pci_process_bridge_OF_ranges(hose, dev, primary);
892 pcibios_free_controller(hose);
895 #endif /* CONFIG_PPC_83xx */
897 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
899 #ifdef CONFIG_PPC_83xx
900 if (is_mpc83xx_pci) {
901 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
902 struct pex_inbound_window *in;
905 /* Walk the Root Complex Inbound windows to match IMMR base */
906 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
907 for (i = 0; i < 4; i++) {
908 /* not enabled, skip */
909 if (!(in_le32(&in[i].ar) & PEX_RCIWARn_EN))
912 if (get_immrbase() == in_le32(&in[i].tar))
913 return (u64)in_le32(&in[i].barh) << 32 |
914 in_le32(&in[i].barl);
917 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
921 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
922 if (!is_mpc83xx_pci) {
925 pci_bus_read_config_dword(hose->bus,
926 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
929 * For PEXCSRBAR, bit 3-0 indicate prefetchable and
930 * address type. So when getting base address, these
931 * bits should be masked
933 base &= PCI_BASE_ADDRESS_MEM_MASK;
943 static int mcheck_handle_load(struct pt_regs *regs, u32 inst)
945 unsigned int rd, ra, rb, d;
952 switch (get_op(inst)) {
954 switch (get_xop(inst)) {
956 case OP_31_XOP_LWBRX:
957 regs->gpr[rd] = 0xffffffff;
960 case OP_31_XOP_LWZUX:
961 regs->gpr[rd] = 0xffffffff;
962 regs->gpr[ra] += regs->gpr[rb];
966 regs->gpr[rd] = 0xff;
969 case OP_31_XOP_LBZUX:
970 regs->gpr[rd] = 0xff;
971 regs->gpr[ra] += regs->gpr[rb];
975 case OP_31_XOP_LHBRX:
976 regs->gpr[rd] = 0xffff;
979 case OP_31_XOP_LHZUX:
980 regs->gpr[rd] = 0xffff;
981 regs->gpr[ra] += regs->gpr[rb];
985 regs->gpr[rd] = ~0UL;
988 case OP_31_XOP_LHAUX:
989 regs->gpr[rd] = ~0UL;
990 regs->gpr[ra] += regs->gpr[rb];
999 regs->gpr[rd] = 0xffffffff;
1003 regs->gpr[rd] = 0xffffffff;
1004 regs->gpr[ra] += (s16)d;
1008 regs->gpr[rd] = 0xff;
1012 regs->gpr[rd] = 0xff;
1013 regs->gpr[ra] += (s16)d;
1017 regs->gpr[rd] = 0xffff;
1021 regs->gpr[rd] = 0xffff;
1022 regs->gpr[ra] += (s16)d;
1026 regs->gpr[rd] = ~0UL;
1030 regs->gpr[rd] = ~0UL;
1031 regs->gpr[ra] += (s16)d;
1041 static int is_in_pci_mem_space(phys_addr_t addr)
1043 struct pci_controller *hose;
1044 struct resource *res;
1047 list_for_each_entry(hose, &hose_list, list_node) {
1048 if (!(hose->indirect_type & PPC_INDIRECT_TYPE_EXT_REG))
1051 for (i = 0; i < 3; i++) {
1052 res = &hose->mem_resources[i];
1053 if ((res->flags & IORESOURCE_MEM) &&
1054 addr >= res->start && addr <= res->end)
1061 int fsl_pci_mcheck_exception(struct pt_regs *regs)
1065 phys_addr_t addr = 0;
1067 /* Let KVM/QEMU deal with the exception */
1068 if (regs->msr & MSR_GS)
1071 #ifdef CONFIG_PHYS_64BIT
1072 addr = mfspr(SPRN_MCARU);
1075 addr += mfspr(SPRN_MCAR);
1077 if (is_in_pci_mem_space(addr)) {
1078 if (user_mode(regs))
1079 ret = copy_from_user_nofault(&inst,
1080 (void __user *)regs->nip, sizeof(inst));
1082 ret = get_kernel_nofault(inst, (void *)regs->nip);
1084 if (!ret && mcheck_handle_load(regs, inst)) {
1085 regs_add_return_ip(regs, 4);
1094 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
1095 static const struct of_device_id pci_ids[] = {
1096 { .compatible = "fsl,mpc8540-pci", },
1097 { .compatible = "fsl,mpc8548-pcie", },
1098 { .compatible = "fsl,mpc8610-pci", },
1099 { .compatible = "fsl,mpc8641-pcie", },
1100 { .compatible = "fsl,qoriq-pcie", },
1101 { .compatible = "fsl,qoriq-pcie-v2.1", },
1102 { .compatible = "fsl,qoriq-pcie-v2.2", },
1103 { .compatible = "fsl,qoriq-pcie-v2.3", },
1104 { .compatible = "fsl,qoriq-pcie-v2.4", },
1105 { .compatible = "fsl,qoriq-pcie-v3.0", },
1108 * The following entries are for compatibility with older device
1111 { .compatible = "fsl,p1022-pcie", },
1112 { .compatible = "fsl,p4080-pcie", },
1117 struct device_node *fsl_pci_primary;
1119 void __init fsl_pci_assign_primary(void)
1121 struct device_node *np;
1123 /* Callers can specify the primary bus using other means. */
1124 if (fsl_pci_primary)
1127 /* If a PCI host bridge contains an ISA node, it's primary. */
1128 np = of_find_node_by_type(NULL, "isa");
1129 while ((fsl_pci_primary = of_get_parent(np))) {
1131 np = fsl_pci_primary;
1133 if (of_match_node(pci_ids, np) && of_device_is_available(np))
1138 * If there's no PCI host bridge with ISA, arbitrarily
1139 * designate one as primary. This can go away once
1140 * various bugs with primary-less systems are fixed.
1142 for_each_matching_node(np, pci_ids) {
1143 if (of_device_is_available(np)) {
1144 fsl_pci_primary = np;
1151 #ifdef CONFIG_PM_SLEEP
1152 static irqreturn_t fsl_pci_pme_handle(int irq, void *dev_id)
1154 struct pci_controller *hose = dev_id;
1155 struct ccsr_pci __iomem *pci = hose->private_data;
1158 dr = in_be32(&pci->pex_pme_mes_dr);
1162 out_be32(&pci->pex_pme_mes_dr, dr);
1167 static int fsl_pci_pme_probe(struct pci_controller *hose)
1169 struct ccsr_pci __iomem *pci;
1170 struct pci_dev *dev;
1175 /* Get hose's pci_dev */
1176 dev = list_first_entry(&hose->bus->devices, typeof(*dev), bus_list);
1179 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1180 pms &= ~PCI_PM_CTRL_PME_ENABLE;
1181 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1183 pme_irq = irq_of_parse_and_map(hose->dn, 0);
1185 dev_err(&dev->dev, "Failed to map PME interrupt.\n");
1190 res = devm_request_irq(hose->parent, pme_irq,
1195 dev_err(&dev->dev, "Unable to request irq %d for PME\n", pme_irq);
1196 irq_dispose_mapping(pme_irq);
1201 pci = hose->private_data;
1203 /* Enable PTOD, ENL23D & EXL23D */
1204 clrbits32(&pci->pex_pme_mes_disr,
1205 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1207 out_be32(&pci->pex_pme_mes_ier, 0);
1208 setbits32(&pci->pex_pme_mes_ier,
1209 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1212 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1213 pms |= PCI_PM_CTRL_PME_ENABLE;
1214 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1219 static void send_pme_turnoff_message(struct pci_controller *hose)
1221 struct ccsr_pci __iomem *pci = hose->private_data;
1225 /* Send PME_Turn_Off Message Request */
1226 setbits32(&pci->pex_pmcr, PEX_PMCR_PTOMR);
1228 /* Wait trun off done */
1229 for (i = 0; i < 150; i++) {
1230 dr = in_be32(&pci->pex_pme_mes_dr);
1232 out_be32(&pci->pex_pme_mes_dr, dr);
1240 static void fsl_pci_syscore_do_suspend(struct pci_controller *hose)
1242 send_pme_turnoff_message(hose);
1245 static int fsl_pci_syscore_suspend(void)
1247 struct pci_controller *hose, *tmp;
1249 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1250 fsl_pci_syscore_do_suspend(hose);
1255 static void fsl_pci_syscore_do_resume(struct pci_controller *hose)
1257 struct ccsr_pci __iomem *pci = hose->private_data;
1261 /* Send Exit L2 State Message */
1262 setbits32(&pci->pex_pmcr, PEX_PMCR_EXL2S);
1264 /* Wait exit done */
1265 for (i = 0; i < 150; i++) {
1266 dr = in_be32(&pci->pex_pme_mes_dr);
1268 out_be32(&pci->pex_pme_mes_dr, dr);
1275 setup_pci_atmu(hose);
1278 static void fsl_pci_syscore_resume(void)
1280 struct pci_controller *hose, *tmp;
1282 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1283 fsl_pci_syscore_do_resume(hose);
1286 static struct syscore_ops pci_syscore_pm_ops = {
1287 .suspend = fsl_pci_syscore_suspend,
1288 .resume = fsl_pci_syscore_resume,
1292 void fsl_pcibios_fixup_phb(struct pci_controller *phb)
1294 #ifdef CONFIG_PM_SLEEP
1295 fsl_pci_pme_probe(phb);
1299 static int add_err_dev(struct platform_device *pdev)
1301 struct platform_device *errdev;
1302 struct mpc85xx_edac_pci_plat_data pd = {
1303 .of_node = pdev->dev.of_node
1306 errdev = platform_device_register_resndata(&pdev->dev,
1308 PLATFORM_DEVID_AUTO,
1310 pdev->num_resources,
1313 return PTR_ERR_OR_ZERO(errdev);
1316 static int fsl_pci_probe(struct platform_device *pdev)
1318 struct device_node *node;
1321 node = pdev->dev.of_node;
1322 ret = fsl_add_bridge(pdev, fsl_pci_primary == node);
1326 ret = add_err_dev(pdev);
1328 dev_err(&pdev->dev, "couldn't register error device: %d\n",
1334 static struct platform_driver fsl_pci_driver = {
1337 .of_match_table = pci_ids,
1339 .probe = fsl_pci_probe,
1342 static int __init fsl_pci_init(void)
1344 #ifdef CONFIG_PM_SLEEP
1345 register_syscore_ops(&pci_syscore_pm_ops);
1347 return platform_driver_register(&fsl_pci_driver);
1349 arch_initcall(fsl_pci_init);