2 * Copyright (c) 2014 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
14 #include <dm/device-internal.h>
16 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP)
17 #include <asm/fsp/fsp_support.h>
19 #include "pci_internal.h"
21 DECLARE_GLOBAL_DATA_PTR;
23 int pci_get_bus(int busnum, struct udevice **busp)
27 ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, busp);
29 /* Since buses may not be numbered yet try a little harder with bus 0 */
31 ret = uclass_first_device_err(UCLASS_PCI, busp);
34 ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, busp);
40 struct udevice *pci_get_controller(struct udevice *dev)
42 while (device_is_on_pci_bus(dev))
48 pci_dev_t dm_pci_get_bdf(struct udevice *dev)
50 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
51 struct udevice *bus = dev->parent;
53 return PCI_ADD_BUS(bus->seq, pplat->devfn);
57 * pci_get_bus_max() - returns the bus number of the last active bus
59 * @return last bus number, or -1 if no active buses
61 static int pci_get_bus_max(void)
67 ret = uclass_get(UCLASS_PCI, &uc);
68 uclass_foreach_dev(bus, uc) {
73 debug("%s: ret=%d\n", __func__, ret);
78 int pci_last_busno(void)
80 return pci_get_bus_max();
83 int pci_get_ff(enum pci_size_t size)
95 int pci_bus_find_devfn(struct udevice *bus, pci_dev_t find_devfn,
96 struct udevice **devp)
100 for (device_find_first_child(bus, &dev);
102 device_find_next_child(&dev)) {
103 struct pci_child_platdata *pplat;
105 pplat = dev_get_parent_platdata(dev);
106 if (pplat && pplat->devfn == find_devfn) {
115 int dm_pci_bus_find_bdf(pci_dev_t bdf, struct udevice **devp)
120 ret = pci_get_bus(PCI_BUS(bdf), &bus);
123 return pci_bus_find_devfn(bus, PCI_MASK_BUS(bdf), devp);
126 static int pci_device_matches_ids(struct udevice *dev,
127 struct pci_device_id *ids)
129 struct pci_child_platdata *pplat;
132 pplat = dev_get_parent_platdata(dev);
135 for (i = 0; ids[i].vendor != 0; i++) {
136 if (pplat->vendor == ids[i].vendor &&
137 pplat->device == ids[i].device)
144 int pci_bus_find_devices(struct udevice *bus, struct pci_device_id *ids,
145 int *indexp, struct udevice **devp)
149 /* Scan all devices on this bus */
150 for (device_find_first_child(bus, &dev);
152 device_find_next_child(&dev)) {
153 if (pci_device_matches_ids(dev, ids) >= 0) {
154 if ((*indexp)-- <= 0) {
164 int pci_find_device_id(struct pci_device_id *ids, int index,
165 struct udevice **devp)
169 /* Scan all known buses */
170 for (uclass_first_device(UCLASS_PCI, &bus);
172 uclass_next_device(&bus)) {
173 if (!pci_bus_find_devices(bus, ids, &index, devp))
181 static int dm_pci_bus_find_device(struct udevice *bus, unsigned int vendor,
182 unsigned int device, int *indexp,
183 struct udevice **devp)
185 struct pci_child_platdata *pplat;
188 for (device_find_first_child(bus, &dev);
190 device_find_next_child(&dev)) {
191 pplat = dev_get_parent_platdata(dev);
192 if (pplat->vendor == vendor && pplat->device == device) {
203 int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
204 struct udevice **devp)
208 /* Scan all known buses */
209 for (uclass_first_device(UCLASS_PCI, &bus);
211 uclass_next_device(&bus)) {
212 if (!dm_pci_bus_find_device(bus, vendor, device, &index, devp))
213 return device_probe(*devp);
220 int dm_pci_find_class(uint find_class, int index, struct udevice **devp)
224 /* Scan all known buses */
225 for (pci_find_first_device(&dev);
227 pci_find_next_device(&dev)) {
228 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
230 if (pplat->class == find_class && !index--) {
232 return device_probe(*devp);
240 int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset,
241 unsigned long value, enum pci_size_t size)
243 struct dm_pci_ops *ops;
245 ops = pci_get_ops(bus);
246 if (!ops->write_config)
248 return ops->write_config(bus, bdf, offset, value, size);
251 int pci_bus_clrset_config32(struct udevice *bus, pci_dev_t bdf, int offset,
257 ret = pci_bus_read_config(bus, bdf, offset, &val, PCI_SIZE_32);
263 return pci_bus_write_config(bus, bdf, offset, val, PCI_SIZE_32);
266 int pci_write_config(pci_dev_t bdf, int offset, unsigned long value,
267 enum pci_size_t size)
272 ret = pci_get_bus(PCI_BUS(bdf), &bus);
276 return pci_bus_write_config(bus, bdf, offset, value, size);
279 int dm_pci_write_config(struct udevice *dev, int offset, unsigned long value,
280 enum pci_size_t size)
284 for (bus = dev; device_is_on_pci_bus(bus);)
286 return pci_bus_write_config(bus, dm_pci_get_bdf(dev), offset, value,
290 int pci_write_config32(pci_dev_t bdf, int offset, u32 value)
292 return pci_write_config(bdf, offset, value, PCI_SIZE_32);
295 int pci_write_config16(pci_dev_t bdf, int offset, u16 value)
297 return pci_write_config(bdf, offset, value, PCI_SIZE_16);
300 int pci_write_config8(pci_dev_t bdf, int offset, u8 value)
302 return pci_write_config(bdf, offset, value, PCI_SIZE_8);
305 int dm_pci_write_config8(struct udevice *dev, int offset, u8 value)
307 return dm_pci_write_config(dev, offset, value, PCI_SIZE_8);
310 int dm_pci_write_config16(struct udevice *dev, int offset, u16 value)
312 return dm_pci_write_config(dev, offset, value, PCI_SIZE_16);
315 int dm_pci_write_config32(struct udevice *dev, int offset, u32 value)
317 return dm_pci_write_config(dev, offset, value, PCI_SIZE_32);
320 int pci_bus_read_config(struct udevice *bus, pci_dev_t bdf, int offset,
321 unsigned long *valuep, enum pci_size_t size)
323 struct dm_pci_ops *ops;
325 ops = pci_get_ops(bus);
326 if (!ops->read_config)
328 return ops->read_config(bus, bdf, offset, valuep, size);
331 int pci_read_config(pci_dev_t bdf, int offset, unsigned long *valuep,
332 enum pci_size_t size)
337 ret = pci_get_bus(PCI_BUS(bdf), &bus);
341 return pci_bus_read_config(bus, bdf, offset, valuep, size);
344 int dm_pci_read_config(struct udevice *dev, int offset, unsigned long *valuep,
345 enum pci_size_t size)
349 for (bus = dev; device_is_on_pci_bus(bus);)
351 return pci_bus_read_config(bus, dm_pci_get_bdf(dev), offset, valuep,
355 int pci_read_config32(pci_dev_t bdf, int offset, u32 *valuep)
360 ret = pci_read_config(bdf, offset, &value, PCI_SIZE_32);
368 int pci_read_config16(pci_dev_t bdf, int offset, u16 *valuep)
373 ret = pci_read_config(bdf, offset, &value, PCI_SIZE_16);
381 int pci_read_config8(pci_dev_t bdf, int offset, u8 *valuep)
386 ret = pci_read_config(bdf, offset, &value, PCI_SIZE_8);
394 int dm_pci_read_config8(struct udevice *dev, int offset, u8 *valuep)
399 ret = dm_pci_read_config(dev, offset, &value, PCI_SIZE_8);
407 int dm_pci_read_config16(struct udevice *dev, int offset, u16 *valuep)
412 ret = dm_pci_read_config(dev, offset, &value, PCI_SIZE_16);
420 int dm_pci_read_config32(struct udevice *dev, int offset, u32 *valuep)
425 ret = dm_pci_read_config(dev, offset, &value, PCI_SIZE_32);
433 int dm_pci_clrset_config8(struct udevice *dev, int offset, u32 clr, u32 set)
438 ret = dm_pci_read_config8(dev, offset, &val);
444 return dm_pci_write_config8(dev, offset, val);
447 int dm_pci_clrset_config16(struct udevice *dev, int offset, u32 clr, u32 set)
452 ret = dm_pci_read_config16(dev, offset, &val);
458 return dm_pci_write_config16(dev, offset, val);
461 int dm_pci_clrset_config32(struct udevice *dev, int offset, u32 clr, u32 set)
466 ret = dm_pci_read_config32(dev, offset, &val);
472 return dm_pci_write_config32(dev, offset, val);
475 static void set_vga_bridge_bits(struct udevice *dev)
477 struct udevice *parent = dev->parent;
480 while (parent->seq != 0) {
481 dm_pci_read_config16(parent, PCI_BRIDGE_CONTROL, &bc);
482 bc |= PCI_BRIDGE_CTL_VGA;
483 dm_pci_write_config16(parent, PCI_BRIDGE_CONTROL, bc);
484 parent = parent->parent;
488 int pci_auto_config_devices(struct udevice *bus)
490 struct pci_controller *hose = bus->uclass_priv;
491 struct pci_child_platdata *pplat;
492 unsigned int sub_bus;
497 debug("%s: start\n", __func__);
498 pciauto_config_init(hose);
499 for (ret = device_find_first_child(bus, &dev);
501 ret = device_find_next_child(&dev)) {
502 unsigned int max_bus;
505 debug("%s: device %s\n", __func__, dev->name);
506 ret = dm_pciauto_config_device(dev);
510 sub_bus = max(sub_bus, max_bus);
512 pplat = dev_get_parent_platdata(dev);
513 if (pplat->class == (PCI_CLASS_DISPLAY_VGA << 8))
514 set_vga_bridge_bits(dev);
516 debug("%s: done\n", __func__);
521 int dm_pci_hose_probe_bus(struct udevice *bus)
526 debug("%s\n", __func__);
528 sub_bus = pci_get_bus_max() + 1;
529 debug("%s: bus = %d/%s\n", __func__, sub_bus, bus->name);
530 dm_pciauto_prescan_setup_bridge(bus, sub_bus);
532 ret = device_probe(bus);
534 debug("%s: Cannot probe bus %s: %d\n", __func__, bus->name,
538 if (sub_bus != bus->seq) {
539 printf("%s: Internal error, bus '%s' got seq %d, expected %d\n",
540 __func__, bus->name, bus->seq, sub_bus);
543 sub_bus = pci_get_bus_max();
544 dm_pciauto_postscan_setup_bridge(bus, sub_bus);
550 * pci_match_one_device - Tell if a PCI device structure has a matching
551 * PCI device id structure
552 * @id: single PCI device id structure to match
553 * @find: the PCI device id structure to match against
555 * Returns true if the finding pci_device_id structure matched or false if
558 static bool pci_match_one_id(const struct pci_device_id *id,
559 const struct pci_device_id *find)
561 if ((id->vendor == PCI_ANY_ID || id->vendor == find->vendor) &&
562 (id->device == PCI_ANY_ID || id->device == find->device) &&
563 (id->subvendor == PCI_ANY_ID || id->subvendor == find->subvendor) &&
564 (id->subdevice == PCI_ANY_ID || id->subdevice == find->subdevice) &&
565 !((id->class ^ find->class) & id->class_mask))
572 * pci_find_and_bind_driver() - Find and bind the right PCI driver
574 * This only looks at certain fields in the descriptor.
576 * @parent: Parent bus
577 * @find_id: Specification of the driver to find
578 * @bdf: Bus/device/function addreess - see PCI_BDF()
579 * @devp: Returns a pointer to the device created
580 * @return 0 if OK, -EPERM if the device is not needed before relocation and
581 * therefore was not created, other -ve value on error
583 static int pci_find_and_bind_driver(struct udevice *parent,
584 struct pci_device_id *find_id,
585 pci_dev_t bdf, struct udevice **devp)
587 struct pci_driver_entry *start, *entry;
596 debug("%s: Searching for driver: vendor=%x, device=%x\n", __func__,
597 find_id->vendor, find_id->device);
598 start = ll_entry_start(struct pci_driver_entry, pci_driver_entry);
599 n_ents = ll_entry_count(struct pci_driver_entry, pci_driver_entry);
600 for (entry = start; entry != start + n_ents; entry++) {
601 const struct pci_device_id *id;
603 const struct driver *drv;
605 for (id = entry->match;
606 id->vendor || id->subvendor || id->class_mask;
608 if (!pci_match_one_id(id, find_id))
614 * In the pre-relocation phase, we only bind devices
615 * whose driver has the DM_FLAG_PRE_RELOC set, to save
616 * precious memory space as on some platforms as that
617 * space is pretty limited (ie: using Cache As RAM).
619 if (!(gd->flags & GD_FLG_RELOC) &&
620 !(drv->flags & DM_FLAG_PRE_RELOC))
624 * We could pass the descriptor to the driver as
625 * platdata (instead of NULL) and allow its bind()
626 * method to return -ENOENT if it doesn't support this
627 * device. That way we could continue the search to
628 * find another driver. For now this doesn't seem
629 * necesssary, so just bind the first match.
631 ret = device_bind(parent, drv, drv->name, NULL, -1,
635 debug("%s: Match found: %s\n", __func__, drv->name);
636 dev->driver_data = find_id->driver_data;
642 bridge = (find_id->class >> 8) == PCI_CLASS_BRIDGE_PCI;
644 * In the pre-relocation phase, we only bind bridge devices to save
645 * precious memory space as on some platforms as that space is pretty
646 * limited (ie: using Cache As RAM).
648 if (!(gd->flags & GD_FLG_RELOC) && !bridge)
651 /* Bind a generic driver so that the device can be used */
652 sprintf(name, "pci_%x:%x.%x", parent->seq, PCI_DEV(bdf),
657 drv = bridge ? "pci_bridge_drv" : "pci_generic_drv";
659 ret = device_bind_driver(parent, drv, str, devp);
661 debug("%s: Failed to bind generic driver: %d\n", __func__, ret);
665 debug("%s: No match found: bound generic driver instead\n", __func__);
670 debug("%s: No match found: error %d\n", __func__, ret);
674 int pci_bind_bus_devices(struct udevice *bus)
676 ulong vendor, device;
683 end = PCI_BDF(bus->seq, PCI_MAX_PCI_DEVICES - 1,
684 PCI_MAX_PCI_FUNCTIONS - 1);
685 for (bdf = PCI_BDF(bus->seq, 0, 0); bdf <= end;
686 bdf += PCI_BDF(0, 0, 1)) {
687 struct pci_child_platdata *pplat;
691 if (PCI_FUNC(bdf) && !found_multi)
693 /* Check only the first access, we don't expect problems */
694 ret = pci_bus_read_config(bus, bdf, PCI_HEADER_TYPE,
695 &header_type, PCI_SIZE_8);
698 pci_bus_read_config(bus, bdf, PCI_VENDOR_ID, &vendor,
700 if (vendor == 0xffff || vendor == 0x0000)
704 found_multi = header_type & 0x80;
706 debug("%s: bus %d/%s: found device %x, function %d\n", __func__,
707 bus->seq, bus->name, PCI_DEV(bdf), PCI_FUNC(bdf));
708 pci_bus_read_config(bus, bdf, PCI_DEVICE_ID, &device,
710 pci_bus_read_config(bus, bdf, PCI_CLASS_REVISION, &class,
714 /* Find this device in the device tree */
715 ret = pci_bus_find_devfn(bus, PCI_MASK_BUS(bdf), &dev);
717 /* If nothing in the device tree, bind a device */
718 if (ret == -ENODEV) {
719 struct pci_device_id find_id;
722 memset(&find_id, '\0', sizeof(find_id));
723 find_id.vendor = vendor;
724 find_id.device = device;
725 find_id.class = class;
726 if ((header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL) {
727 pci_bus_read_config(bus, bdf,
728 PCI_SUBSYSTEM_VENDOR_ID,
730 find_id.subvendor = val & 0xffff;
731 find_id.subdevice = val >> 16;
733 ret = pci_find_and_bind_driver(bus, &find_id, bdf,
741 /* Update the platform data */
742 pplat = dev_get_parent_platdata(dev);
743 pplat->devfn = PCI_MASK_BUS(bdf);
744 pplat->vendor = vendor;
745 pplat->device = device;
746 pplat->class = class;
751 printf("Cannot read bus configuration: %d\n", ret);
756 static int decode_regions(struct pci_controller *hose, ofnode parent_node,
759 int pci_addr_cells, addr_cells, size_cells;
760 phys_addr_t base = 0, size;
761 int cells_per_record;
766 prop = ofnode_read_prop(node, "ranges", &len);
769 pci_addr_cells = ofnode_read_simple_addr_cells(node);
770 addr_cells = ofnode_read_simple_addr_cells(parent_node);
771 size_cells = ofnode_read_simple_size_cells(node);
773 /* PCI addresses are always 3-cells */
775 cells_per_record = pci_addr_cells + addr_cells + size_cells;
776 hose->region_count = 0;
777 debug("%s: len=%d, cells_per_record=%d\n", __func__, len,
779 for (i = 0; i < MAX_PCI_REGIONS; i++, len -= cells_per_record) {
780 u64 pci_addr, addr, size;
786 if (len < cells_per_record)
788 flags = fdt32_to_cpu(prop[0]);
789 space_code = (flags >> 24) & 3;
790 pci_addr = fdtdec_get_number(prop + 1, 2);
791 prop += pci_addr_cells;
792 addr = fdtdec_get_number(prop, addr_cells);
794 size = fdtdec_get_number(prop, size_cells);
796 debug("%s: region %d, pci_addr=%" PRIx64 ", addr=%" PRIx64
797 ", size=%" PRIx64 ", space_code=%d\n", __func__,
798 hose->region_count, pci_addr, addr, size, space_code);
799 if (space_code & 2) {
800 type = flags & (1U << 30) ? PCI_REGION_PREFETCH :
802 } else if (space_code & 1) {
803 type = PCI_REGION_IO;
808 for (i = 0; i < hose->region_count; i++) {
809 if (hose->regions[i].flags == type)
813 pos = hose->region_count++;
814 debug(" - type=%d, pos=%d\n", type, pos);
815 pci_set_region(hose->regions + pos, pci_addr, addr, size, type);
818 /* Add a region for our local memory */
820 #ifdef CONFIG_SYS_SDRAM_BASE
821 base = CONFIG_SYS_SDRAM_BASE;
823 if (gd->pci_ram_top && gd->pci_ram_top < base + size)
824 size = gd->pci_ram_top - base;
825 pci_set_region(hose->regions + hose->region_count++, base, base,
826 size, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
831 static int pci_uclass_pre_probe(struct udevice *bus)
833 struct pci_controller *hose;
836 debug("%s, bus=%d/%s, parent=%s\n", __func__, bus->seq, bus->name,
838 hose = bus->uclass_priv;
840 /* For bridges, use the top-level PCI controller */
841 if (!device_is_on_pci_bus(bus)) {
843 ret = decode_regions(hose, dev_ofnode(bus->parent),
846 debug("%s: Cannot decode regions\n", __func__);
850 struct pci_controller *parent_hose;
852 parent_hose = dev_get_uclass_priv(bus->parent);
853 hose->ctlr = parent_hose->bus;
856 hose->first_busno = bus->seq;
857 hose->last_busno = bus->seq;
862 static int pci_uclass_post_probe(struct udevice *bus)
866 debug("%s: probing bus %d\n", __func__, bus->seq);
867 ret = pci_bind_bus_devices(bus);
871 #ifdef CONFIG_PCI_PNP
872 ret = pci_auto_config_devices(bus);
877 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP)
879 * Per Intel FSP specification, we should call FSP notify API to
880 * inform FSP that PCI enumeration has been done so that FSP will
881 * do any necessary initialization as required by the chipset's
882 * BIOS Writer's Guide (BWG).
884 * Unfortunately we have to put this call here as with driver model,
885 * the enumeration is all done on a lazy basis as needed, so until
886 * something is touched on PCI it won't happen.
888 * Note we only call this 1) after U-Boot is relocated, and 2)
889 * root bus has finished probing.
891 if ((gd->flags & GD_FLG_RELOC) && (bus->seq == 0)) {
892 ret = fsp_init_phase_pci();
901 static int pci_uclass_child_post_bind(struct udevice *dev)
903 struct pci_child_platdata *pplat;
904 struct fdt_pci_addr addr;
907 if (!dev_of_valid(dev))
911 * We could read vendor, device, class if available. But for now we
912 * just check the address.
914 pplat = dev_get_parent_platdata(dev);
915 ret = ofnode_read_pci_addr(dev_ofnode(dev), FDT_PCI_SPACE_CONFIG, "reg",
922 /* extract the devfn from fdt_pci_addr */
923 pplat->devfn = addr.phys_hi & 0xff00;
929 static int pci_bridge_read_config(struct udevice *bus, pci_dev_t bdf,
930 uint offset, ulong *valuep,
931 enum pci_size_t size)
933 struct pci_controller *hose = bus->uclass_priv;
935 return pci_bus_read_config(hose->ctlr, bdf, offset, valuep, size);
938 static int pci_bridge_write_config(struct udevice *bus, pci_dev_t bdf,
939 uint offset, ulong value,
940 enum pci_size_t size)
942 struct pci_controller *hose = bus->uclass_priv;
944 return pci_bus_write_config(hose->ctlr, bdf, offset, value, size);
947 static int skip_to_next_device(struct udevice *bus, struct udevice **devp)
953 * Scan through all the PCI controllers. On x86 there will only be one
954 * but that is not necessarily true on other hardware.
957 device_find_first_child(bus, &dev);
962 ret = uclass_next_device(&bus);
970 int pci_find_next_device(struct udevice **devp)
972 struct udevice *child = *devp;
973 struct udevice *bus = child->parent;
976 /* First try all the siblings */
979 device_find_next_child(&child);
986 /* We ran out of siblings. Try the next bus */
987 ret = uclass_next_device(&bus);
991 return bus ? skip_to_next_device(bus, devp) : 0;
994 int pci_find_first_device(struct udevice **devp)
1000 ret = uclass_first_device(UCLASS_PCI, &bus);
1004 return skip_to_next_device(bus, devp);
1007 ulong pci_conv_32_to_size(ulong value, uint offset, enum pci_size_t size)
1011 return (value >> ((offset & 3) * 8)) & 0xff;
1013 return (value >> ((offset & 2) * 8)) & 0xffff;
1019 ulong pci_conv_size_to_32(ulong old, ulong value, uint offset,
1020 enum pci_size_t size)
1023 uint val_mask, shift;
1038 shift = (offset & off_mask) * 8;
1039 ldata = (value & val_mask) << shift;
1040 mask = val_mask << shift;
1041 value = (old & ~mask) | ldata;
1046 int pci_get_regions(struct udevice *dev, struct pci_region **iop,
1047 struct pci_region **memp, struct pci_region **prefp)
1049 struct udevice *bus = pci_get_controller(dev);
1050 struct pci_controller *hose = dev_get_uclass_priv(bus);
1056 for (i = 0; i < hose->region_count; i++) {
1057 switch (hose->regions[i].flags) {
1059 if (!*iop || (*iop)->size < hose->regions[i].size)
1060 *iop = hose->regions + i;
1062 case PCI_REGION_MEM:
1063 if (!*memp || (*memp)->size < hose->regions[i].size)
1064 *memp = hose->regions + i;
1066 case (PCI_REGION_MEM | PCI_REGION_PREFETCH):
1067 if (!*prefp || (*prefp)->size < hose->regions[i].size)
1068 *prefp = hose->regions + i;
1073 return (*iop != NULL) + (*memp != NULL) + (*prefp != NULL);
1076 u32 dm_pci_read_bar32(struct udevice *dev, int barnum)
1081 bar = PCI_BASE_ADDRESS_0 + barnum * 4;
1082 dm_pci_read_config32(dev, bar, &addr);
1083 if (addr & PCI_BASE_ADDRESS_SPACE_IO)
1084 return addr & PCI_BASE_ADDRESS_IO_MASK;
1086 return addr & PCI_BASE_ADDRESS_MEM_MASK;
1089 void dm_pci_write_bar32(struct udevice *dev, int barnum, u32 addr)
1093 bar = PCI_BASE_ADDRESS_0 + barnum * 4;
1094 dm_pci_write_config32(dev, bar, addr);
1097 static int _dm_pci_bus_to_phys(struct udevice *ctlr,
1098 pci_addr_t bus_addr, unsigned long flags,
1099 unsigned long skip_mask, phys_addr_t *pa)
1101 struct pci_controller *hose = dev_get_uclass_priv(ctlr);
1102 struct pci_region *res;
1105 for (i = 0; i < hose->region_count; i++) {
1106 res = &hose->regions[i];
1108 if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
1111 if (res->flags & skip_mask)
1114 if (bus_addr >= res->bus_start &&
1115 (bus_addr - res->bus_start) < res->size) {
1116 *pa = (bus_addr - res->bus_start + res->phys_start);
1124 phys_addr_t dm_pci_bus_to_phys(struct udevice *dev, pci_addr_t bus_addr,
1125 unsigned long flags)
1127 phys_addr_t phys_addr = 0;
1128 struct udevice *ctlr;
1131 /* The root controller has the region information */
1132 ctlr = pci_get_controller(dev);
1135 * if PCI_REGION_MEM is set we do a two pass search with preference
1136 * on matches that don't have PCI_REGION_SYS_MEMORY set
1138 if ((flags & PCI_REGION_TYPE) == PCI_REGION_MEM) {
1139 ret = _dm_pci_bus_to_phys(ctlr, bus_addr,
1140 flags, PCI_REGION_SYS_MEMORY,
1146 ret = _dm_pci_bus_to_phys(ctlr, bus_addr, flags, 0, &phys_addr);
1149 puts("pci_hose_bus_to_phys: invalid physical address\n");
1154 int _dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t phys_addr,
1155 unsigned long flags, unsigned long skip_mask,
1158 struct pci_region *res;
1159 struct udevice *ctlr;
1160 pci_addr_t bus_addr;
1162 struct pci_controller *hose;
1164 /* The root controller has the region information */
1165 ctlr = pci_get_controller(dev);
1166 hose = dev_get_uclass_priv(ctlr);
1168 for (i = 0; i < hose->region_count; i++) {
1169 res = &hose->regions[i];
1171 if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
1174 if (res->flags & skip_mask)
1177 bus_addr = phys_addr - res->phys_start + res->bus_start;
1179 if (bus_addr >= res->bus_start &&
1180 (bus_addr - res->bus_start) < res->size) {
1189 pci_addr_t dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t phys_addr,
1190 unsigned long flags)
1192 pci_addr_t bus_addr = 0;
1196 * if PCI_REGION_MEM is set we do a two pass search with preference
1197 * on matches that don't have PCI_REGION_SYS_MEMORY set
1199 if ((flags & PCI_REGION_TYPE) == PCI_REGION_MEM) {
1200 ret = _dm_pci_phys_to_bus(dev, phys_addr, flags,
1201 PCI_REGION_SYS_MEMORY, &bus_addr);
1206 ret = _dm_pci_phys_to_bus(dev, phys_addr, flags, 0, &bus_addr);
1209 puts("pci_hose_phys_to_bus: invalid physical address\n");
1214 void *dm_pci_map_bar(struct udevice *dev, int bar, int flags)
1216 pci_addr_t pci_bus_addr;
1219 /* read BAR address */
1220 dm_pci_read_config32(dev, bar, &bar_response);
1221 pci_bus_addr = (pci_addr_t)(bar_response & ~0xf);
1224 * Pass "0" as the length argument to pci_bus_to_virt. The arg
1225 * isn't actualy used on any platform because u-boot assumes a static
1226 * linear mapping. In the future, this could read the BAR size
1227 * and pass that as the size if needed.
1229 return dm_pci_bus_to_virt(dev, pci_bus_addr, flags, 0, MAP_NOCACHE);
1232 UCLASS_DRIVER(pci) = {
1235 .flags = DM_UC_FLAG_SEQ_ALIAS,
1236 .post_bind = dm_scan_fdt_dev,
1237 .pre_probe = pci_uclass_pre_probe,
1238 .post_probe = pci_uclass_post_probe,
1239 .child_post_bind = pci_uclass_child_post_bind,
1240 .per_device_auto_alloc_size = sizeof(struct pci_controller),
1241 .per_child_platdata_auto_alloc_size =
1242 sizeof(struct pci_child_platdata),
1245 static const struct dm_pci_ops pci_bridge_ops = {
1246 .read_config = pci_bridge_read_config,
1247 .write_config = pci_bridge_write_config,
1250 static const struct udevice_id pci_bridge_ids[] = {
1251 { .compatible = "pci-bridge" },
1255 U_BOOT_DRIVER(pci_bridge_drv) = {
1256 .name = "pci_bridge_drv",
1258 .of_match = pci_bridge_ids,
1259 .ops = &pci_bridge_ops,
1262 UCLASS_DRIVER(pci_generic) = {
1263 .id = UCLASS_PCI_GENERIC,
1264 .name = "pci_generic",
1267 static const struct udevice_id pci_generic_ids[] = {
1268 { .compatible = "pci-generic" },
1272 U_BOOT_DRIVER(pci_generic_drv) = {
1273 .name = "pci_generic_drv",
1274 .id = UCLASS_PCI_GENERIC,
1275 .of_match = pci_generic_ids,
1280 struct udevice *bus;
1283 * Enumerate all known controller devices. Enumeration has the side-
1284 * effect of probing them, so PCIe devices will be enumerated too.
1286 for (uclass_first_device(UCLASS_PCI, &bus);
1288 uclass_next_device(&bus)) {