1 // SPDX-License-Identifier: GPL-2.0
3 * PCIe driver for Marvell MVEBU SoCs
5 * Based on Barebox drivers/pci/pci-mvebu.c
17 #include <dm/device-internal.h>
19 #include <dm/of_access.h>
23 #include <asm/arch/cpu.h>
24 #include <asm/arch/soc.h>
25 #include <linux/bitops.h>
26 #include <linux/delay.h>
27 #include <linux/errno.h>
28 #include <linux/ioport.h>
29 #include <linux/mbus.h>
30 #include <linux/sizes.h>
32 /* PCIe unit register offsets */
33 #define MVPCIE_ROOT_PORT_PCI_CFG_OFF 0x0000
34 #define MVPCIE_ROOT_PORT_PCI_EXP_OFF 0x0060
35 #define MVPCIE_BAR_LO_OFF(n) (0x0010 + ((n) << 3))
36 #define MVPCIE_BAR_HI_OFF(n) (0x0014 + ((n) << 3))
37 #define MVPCIE_BAR_CTRL_OFF(n) (0x1804 + (((n) - 1) * 4))
38 #define MVPCIE_WIN04_CTRL_OFF(n) (0x1820 + ((n) << 4))
39 #define MVPCIE_WIN04_BASE_OFF(n) (0x1824 + ((n) << 4))
40 #define MVPCIE_WIN04_REMAP_OFF(n) (0x182c + ((n) << 4))
41 #define MVPCIE_WIN5_CTRL_OFF 0x1880
42 #define MVPCIE_WIN5_BASE_OFF 0x1884
43 #define MVPCIE_WIN5_REMAP_OFF 0x188c
44 #define MVPCIE_CONF_ADDR_OFF 0x18f8
45 #define MVPCIE_CONF_DATA_OFF 0x18fc
46 #define MVPCIE_CTRL_OFF 0x1a00
47 #define MVPCIE_CTRL_RC_MODE BIT(1)
48 #define MVPCIE_STAT_OFF 0x1a04
49 #define MVPCIE_STAT_BUS (0xff << 8)
50 #define MVPCIE_STAT_DEV (0x1f << 16)
51 #define MVPCIE_STAT_LINK_DOWN BIT(0)
53 #define LINK_WAIT_RETRIES 100
54 #define LINK_WAIT_TIMEOUT 1000
57 struct pci_controller hose;
59 void __iomem *membase;
70 unsigned int mem_target;
71 unsigned int mem_attr;
72 unsigned int io_target;
74 u32 cfgcache[(0x3c - 0x10) / 4];
77 static inline bool mvebu_pcie_link_up(struct mvebu_pcie *pcie)
80 val = readl(pcie->base + MVPCIE_STAT_OFF);
81 return !(val & MVPCIE_STAT_LINK_DOWN);
84 static void mvebu_pcie_wait_for_link(struct mvebu_pcie *pcie)
88 /* check if the link is up or not */
89 for (retries = 0; retries < LINK_WAIT_RETRIES; retries++) {
90 if (mvebu_pcie_link_up(pcie)) {
91 printf("%s: Link up\n", pcie->name);
95 udelay(LINK_WAIT_TIMEOUT);
98 printf("%s: Link down\n", pcie->name);
101 static void mvebu_pcie_set_local_bus_nr(struct mvebu_pcie *pcie, int busno)
105 stat = readl(pcie->base + MVPCIE_STAT_OFF);
106 stat &= ~MVPCIE_STAT_BUS;
108 writel(stat, pcie->base + MVPCIE_STAT_OFF);
111 static void mvebu_pcie_set_local_dev_nr(struct mvebu_pcie *pcie, int devno)
115 stat = readl(pcie->base + MVPCIE_STAT_OFF);
116 stat &= ~MVPCIE_STAT_DEV;
118 writel(stat, pcie->base + MVPCIE_STAT_OFF);
121 static inline struct mvebu_pcie *hose_to_pcie(struct pci_controller *hose)
123 return container_of(hose, struct mvebu_pcie, hose);
126 static bool mvebu_pcie_valid_addr(struct mvebu_pcie *pcie,
127 int busno, int dev, int func)
129 /* On the root bus is only one PCI Bridge */
130 if (busno == 0 && (dev != 0 || func != 0))
133 /* Access to other buses is possible when link is up */
134 if (busno != 0 && !mvebu_pcie_link_up(pcie))
137 /* On secondary bus can be only one PCIe device */
138 if (busno == pcie->sec_busno && dev != 0)
144 static int mvebu_pcie_read_config(const struct udevice *bus, pci_dev_t bdf,
145 uint offset, ulong *valuep,
146 enum pci_size_t size)
148 struct mvebu_pcie *pcie = dev_get_plat(bus);
149 int busno = PCI_BUS(bdf) - dev_seq(bus);
152 debug("PCIE CFG read: (b,d,f)=(%2d,%2d,%2d) ",
153 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
155 if (!mvebu_pcie_valid_addr(pcie, busno, PCI_DEV(bdf), PCI_FUNC(bdf))) {
156 debug("- out of range\n");
157 *valuep = pci_get_ff(size);
162 * The configuration space of the PCI Bridge on the root bus (zero) is
163 * of Type 0 but the BAR registers (including ROM BAR) don't have the
164 * same meaning as in the PCIe specification. Therefore do not access
165 * BAR registers and non-common registers (those which have different
166 * meaning for Type 0 and Type 1 config space) of the PCI Bridge and
167 * instead read their content from driver virtual cfgcache[].
169 if (busno == 0 && ((offset >= 0x10 && offset < 0x34) ||
170 (offset >= 0x38 && offset < 0x3c))) {
171 data = pcie->cfgcache[(offset - 0x10) / 4];
172 debug("(addr,size,val)=(0x%04x, %d, 0x%08x) from cfgcache\n",
174 *valuep = pci_conv_32_to_size(data, offset, size);
179 * PCI bridge is device 0 at the root bus (zero) but mvebu has it
180 * mapped on secondary bus with device number 1.
183 addr = PCI_CONF1_EXT_ADDRESS(pcie->sec_busno, 1, 0, offset);
185 addr = PCI_CONF1_EXT_ADDRESS(busno, PCI_DEV(bdf), PCI_FUNC(bdf), offset);
188 writel(addr, pcie->base + MVPCIE_CONF_ADDR_OFF);
193 data = readb(pcie->base + MVPCIE_CONF_DATA_OFF + (offset & 3));
196 data = readw(pcie->base + MVPCIE_CONF_DATA_OFF + (offset & 2));
199 data = readl(pcie->base + MVPCIE_CONF_DATA_OFF);
205 if (busno == 0 && (offset & ~3) == (PCI_HEADER_TYPE & ~3)) {
207 * Change Header Type of PCI Bridge device to Type 1
208 * (0x01, used by PCI Bridges) because mvebu reports
209 * Type 0 (0x00, used by Upstream and Endpoint devices).
211 data = pci_conv_size_to_32(data, 0, offset, size);
213 data |= PCI_HEADER_TYPE_BRIDGE << 16;
214 data = pci_conv_32_to_size(data, offset, size);
217 debug("(addr,size,val)=(0x%04x, %d, 0x%08x)\n", offset, size, data);
223 static int mvebu_pcie_write_config(struct udevice *bus, pci_dev_t bdf,
224 uint offset, ulong value,
225 enum pci_size_t size)
227 struct mvebu_pcie *pcie = dev_get_plat(bus);
228 int busno = PCI_BUS(bdf) - dev_seq(bus);
231 debug("PCIE CFG write: (b,d,f)=(%2d,%2d,%2d) ",
232 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
233 debug("(addr,size,val)=(0x%04x, %d, 0x%08lx)\n", offset, size, value);
235 if (!mvebu_pcie_valid_addr(pcie, busno, PCI_DEV(bdf), PCI_FUNC(bdf))) {
236 debug("- out of range\n");
241 * As explained in mvebu_pcie_read_config(), PCI Bridge Type 1 specific
242 * config registers are not available, so we write their content only
243 * into driver virtual cfgcache[].
244 * And as explained in mvebu_pcie_probe(), mvebu has its own specific
245 * way for configuring secondary bus number.
247 if (busno == 0 && ((offset >= 0x10 && offset < 0x34) ||
248 (offset >= 0x38 && offset < 0x3c))) {
249 debug("Writing to cfgcache only\n");
250 data = pcie->cfgcache[(offset - 0x10) / 4];
251 data = pci_conv_size_to_32(data, value, offset, size);
252 /* mvebu PCI bridge does not have configurable bars */
253 if ((offset & ~3) == PCI_BASE_ADDRESS_0 ||
254 (offset & ~3) == PCI_BASE_ADDRESS_1 ||
255 (offset & ~3) == PCI_ROM_ADDRESS1)
257 pcie->cfgcache[(offset - 0x10) / 4] = data;
258 /* mvebu has its own way how to set PCI secondary bus number */
259 if (offset == PCI_SECONDARY_BUS ||
260 (offset == PCI_PRIMARY_BUS && size != PCI_SIZE_8)) {
261 pcie->sec_busno = (data >> 8) & 0xff;
262 mvebu_pcie_set_local_bus_nr(pcie, pcie->sec_busno);
263 debug("Secondary bus number was changed to %d\n",
270 * PCI bridge is device 0 at the root bus (zero) but mvebu has it
271 * mapped on secondary bus with device number 1.
274 addr = PCI_CONF1_EXT_ADDRESS(pcie->sec_busno, 1, 0, offset);
276 addr = PCI_CONF1_EXT_ADDRESS(busno, PCI_DEV(bdf), PCI_FUNC(bdf), offset);
279 writel(addr, pcie->base + MVPCIE_CONF_ADDR_OFF);
284 writeb(value, pcie->base + MVPCIE_CONF_DATA_OFF + (offset & 3));
287 writew(value, pcie->base + MVPCIE_CONF_DATA_OFF + (offset & 2));
290 writel(value, pcie->base + MVPCIE_CONF_DATA_OFF);
300 * Setup PCIE BARs and Address Decode Wins:
301 * BAR[0] -> internal registers
302 * BAR[1] -> covers all DRAM banks
304 * WIN[0-3] -> DRAM bank[0-3]
306 static void mvebu_pcie_setup_wins(struct mvebu_pcie *pcie)
308 const struct mbus_dram_target_info *dram = mvebu_mbus_dram_info();
312 /* First, disable and clear BARs and windows. */
313 for (i = 1; i < 3; i++) {
314 writel(0, pcie->base + MVPCIE_BAR_CTRL_OFF(i));
315 writel(0, pcie->base + MVPCIE_BAR_LO_OFF(i));
316 writel(0, pcie->base + MVPCIE_BAR_HI_OFF(i));
319 for (i = 0; i < 5; i++) {
320 writel(0, pcie->base + MVPCIE_WIN04_CTRL_OFF(i));
321 writel(0, pcie->base + MVPCIE_WIN04_BASE_OFF(i));
322 writel(0, pcie->base + MVPCIE_WIN04_REMAP_OFF(i));
325 writel(0, pcie->base + MVPCIE_WIN5_CTRL_OFF);
326 writel(0, pcie->base + MVPCIE_WIN5_BASE_OFF);
327 writel(0, pcie->base + MVPCIE_WIN5_REMAP_OFF);
329 /* Setup windows for DDR banks. Count total DDR size on the fly. */
331 for (i = 0; i < dram->num_cs; i++) {
332 const struct mbus_dram_window *cs = dram->cs + i;
334 writel(cs->base & 0xffff0000,
335 pcie->base + MVPCIE_WIN04_BASE_OFF(i));
336 writel(0, pcie->base + MVPCIE_WIN04_REMAP_OFF(i));
337 writel(((cs->size - 1) & 0xffff0000) |
338 (cs->mbus_attr << 8) |
339 (dram->mbus_dram_target_id << 4) | 1,
340 pcie->base + MVPCIE_WIN04_CTRL_OFF(i));
345 /* Round up 'size' to the nearest power of two. */
346 if ((size & (size - 1)) != 0)
347 size = 1 << fls(size);
349 /* Setup BAR[1] to all DRAM banks. */
350 writel(dram->cs[0].base | 0xc, pcie->base + MVPCIE_BAR_LO_OFF(1));
351 writel(0, pcie->base + MVPCIE_BAR_HI_OFF(1));
352 writel(((size - 1) & 0xffff0000) | 0x1,
353 pcie->base + MVPCIE_BAR_CTRL_OFF(1));
355 /* Setup BAR[0] to internal registers. */
356 writel(pcie->intregs, pcie->base + MVPCIE_BAR_LO_OFF(0));
357 writel(0, pcie->base + MVPCIE_BAR_HI_OFF(0));
360 /* Only enable PCIe link, do not setup it */
361 static int mvebu_pcie_enable_link(struct mvebu_pcie *pcie, ofnode node)
363 struct reset_ctl rst;
366 ret = reset_get_by_index_nodev(node, 0, &rst);
367 if (ret == -ENOENT) {
369 } else if (ret < 0) {
370 printf("%s: cannot get reset controller: %d\n", pcie->name, ret);
374 ret = reset_request(&rst);
376 printf("%s: cannot request reset controller: %d\n", pcie->name, ret);
380 ret = reset_deassert(&rst);
383 printf("%s: cannot enable PCIe port: %d\n", pcie->name, ret);
390 /* Setup PCIe link but do not enable it */
391 static void mvebu_pcie_setup_link(struct mvebu_pcie *pcie)
395 /* Setup PCIe controller to Root Complex mode */
396 reg = readl(pcie->base + MVPCIE_CTRL_OFF);
397 reg |= MVPCIE_CTRL_RC_MODE;
398 writel(reg, pcie->base + MVPCIE_CTRL_OFF);
401 * Set Maximum Link Width to X1 or X4 in Root Port's PCIe Link
402 * Capability register. This register is defined by PCIe specification
403 * as read-only but this mvebu controller has it as read-write and must
404 * be set to number of SerDes PCIe lanes (1 or 4). If this register is
405 * not set correctly then link with endpoint card is not established.
407 reg = readl(pcie->base + MVPCIE_ROOT_PORT_PCI_EXP_OFF + PCI_EXP_LNKCAP);
408 reg &= ~PCI_EXP_LNKCAP_MLW;
409 reg |= (pcie->is_x4 ? 4 : 1) << 4;
410 writel(reg, pcie->base + MVPCIE_ROOT_PORT_PCI_EXP_OFF + PCI_EXP_LNKCAP);
413 static int mvebu_pcie_probe(struct udevice *dev)
415 struct mvebu_pcie *pcie = dev_get_plat(dev);
416 struct udevice *ctlr = pci_get_controller(dev);
417 struct pci_controller *hose = dev_get_uclass_priv(ctlr);
421 * Change Class Code of PCI Bridge device to PCI Bridge (0x600400)
422 * because default value is Memory controller (0x508000) which
423 * U-Boot cannot recognize as P2P Bridge.
425 * Note that this mvebu PCI Bridge does not have compliant Type 1
426 * Configuration Space. Header Type is reported as Type 0 and it
427 * has format of Type 0 config space.
429 * Moreover Type 0 BAR registers (ranges 0x10 - 0x28 and 0x30 - 0x34)
430 * have the same format in Marvell's specification as in PCIe
431 * specification, but their meaning is totally different and they do
432 * different things: they are aliased into internal mvebu registers
433 * (e.g. MVPCIE_BAR_LO_OFF) and these should not be changed or
434 * reconfigured by pci device drivers.
436 * So our driver converts Type 0 config space to Type 1 and reports
437 * Header Type as Type 1. Access to BAR registers and to non-existent
438 * Type 1 registers is redirected to the virtual cfgcache[] buffer,
439 * which avoids changing unrelated registers.
441 reg = readl(pcie->base + MVPCIE_ROOT_PORT_PCI_CFG_OFF + PCI_CLASS_REVISION);
443 reg |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
444 writel(reg, pcie->base + MVPCIE_ROOT_PORT_PCI_CFG_OFF + PCI_CLASS_REVISION);
447 * mvebu uses local bus number and local device number to determinate
448 * type of config request. Type 0 is used if target bus number equals
449 * local bus number and target device number differs from local device
450 * number. Type 1 is used if target bus number differs from local bus
451 * number. And when target bus number equals local bus number and
452 * target device equals local device number then request is routed to
453 * PCI Bridge which represent local PCIe Root Port.
455 * It means that PCI root and secondary buses shares one bus number
456 * which is configured via local bus number. Determination if config
457 * request should go to root or secondary bus is done based on local
460 * PCIe is point-to-point bus, so at secondary bus is always exactly one
461 * device with number 0. So set local device number to 1, it would not
462 * conflict with any device on secondary bus number and will ensure that
463 * accessing secondary bus and all buses behind secondary would work
464 * automatically and correctly. Therefore this configuration of local
465 * device number implies that setting of local bus number configures
466 * secondary bus number. Set it to 0 as U-Boot CONFIG_PCI_PNP code will
467 * later configure it via config write requests to the correct value.
468 * mvebu_pcie_write_config() catches config write requests which tries
469 * to change secondary bus number and correctly updates local bus number
470 * based on new secondary bus number.
472 * With this configuration is PCI Bridge available at secondary bus as
473 * device number 1. But it must be available at root bus (zero) as device
474 * number 0. So in mvebu_pcie_read_config() and mvebu_pcie_write_config()
475 * functions rewrite address to the real one when accessing the root bus.
477 mvebu_pcie_set_local_bus_nr(pcie, 0);
478 mvebu_pcie_set_local_dev_nr(pcie, 1);
481 * Kirkwood arch code already maps mbus windows for PCIe IO and MEM.
482 * So skip calling mvebu_mbus_add_window_by_id() function as it would
483 * fail on error "conflicts with another window" which means conflict
484 * with existing PCIe window mappings.
486 #ifndef CONFIG_ARCH_KIRKWOOD
487 if (resource_size(&pcie->mem) &&
488 mvebu_mbus_add_window_by_id(pcie->mem_target, pcie->mem_attr,
489 (phys_addr_t)pcie->mem.start,
490 resource_size(&pcie->mem))) {
491 printf("%s: unable to add mbus window for mem at %08x+%08x\n",
493 (u32)pcie->mem.start, (unsigned)resource_size(&pcie->mem));
498 if (resource_size(&pcie->io) &&
499 mvebu_mbus_add_window_by_id(pcie->io_target, pcie->io_attr,
500 (phys_addr_t)pcie->io.start,
501 resource_size(&pcie->io))) {
502 printf("%s: unable to add mbus window for IO at %08x+%08x\n",
504 (u32)pcie->io.start, (unsigned)resource_size(&pcie->io));
510 /* Setup windows and configure host bridge */
511 mvebu_pcie_setup_wins(pcie);
513 /* PCI memory space */
514 pci_set_region(hose->regions + 0, pcie->mem.start,
515 pcie->mem.start, resource_size(&pcie->mem), PCI_REGION_MEM);
516 hose->region_count = 1;
518 if (resource_size(&pcie->mem)) {
519 pci_set_region(hose->regions + hose->region_count,
520 pcie->mem.start, pcie->mem.start,
521 resource_size(&pcie->mem),
523 hose->region_count++;
526 if (resource_size(&pcie->io)) {
527 pci_set_region(hose->regions + hose->region_count,
528 pcie->io.start, pcie->io.start,
529 resource_size(&pcie->io),
531 hose->region_count++;
534 /* PCI Bridge support 32-bit I/O and 64-bit prefetch mem addressing */
535 pcie->cfgcache[(PCI_IO_BASE - 0x10) / 4] =
536 PCI_IO_RANGE_TYPE_32 | (PCI_IO_RANGE_TYPE_32 << 8);
537 pcie->cfgcache[(PCI_PREF_MEMORY_BASE - 0x10) / 4] =
538 PCI_PREF_RANGE_TYPE_64 | (PCI_PREF_RANGE_TYPE_64 << 16);
540 mvebu_pcie_wait_for_link(pcie);
545 #define DT_FLAGS_TO_TYPE(flags) (((flags) >> 24) & 0x03)
546 #define DT_TYPE_IO 0x1
547 #define DT_TYPE_MEM32 0x2
548 #define DT_CPUADDR_TO_TARGET(cpuaddr) (((cpuaddr) >> 56) & 0xFF)
549 #define DT_CPUADDR_TO_ATTR(cpuaddr) (((cpuaddr) >> 48) & 0xFF)
551 static int mvebu_get_tgt_attr(ofnode node, int devfn,
556 const int na = 3, ns = 2;
558 int rlen, nranges, rangesz, pna, i;
563 range = ofnode_get_property(node, "ranges", &rlen);
568 * Linux uses of_n_addr_cells() to get the number of address cells
569 * here. Currently this function is only available in U-Boot when
570 * CONFIG_OF_LIVE is enabled. Until this is enabled for MVEBU in
571 * general, lets't hardcode the "pna" value in the U-Boot code.
573 pna = 2; /* hardcoded for now because of lack of of_n_addr_cells() */
574 rangesz = pna + na + ns;
575 nranges = rlen / sizeof(__be32) / rangesz;
577 for (i = 0; i < nranges; i++, range += rangesz) {
578 u32 flags = of_read_number(range, 1);
579 u32 slot = of_read_number(range + 1, 1);
580 u64 cpuaddr = of_read_number(range + na, pna);
583 if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_IO)
584 rtype = IORESOURCE_IO;
585 else if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_MEM32)
586 rtype = IORESOURCE_MEM;
591 * The Linux code used PCI_SLOT() here, which expects devfn
592 * in bits 7..0. PCI_DEV() in U-Boot is similar to PCI_SLOT(),
593 * only expects devfn in 15..8, where its saved in this driver.
595 if (slot == PCI_DEV(devfn) && type == rtype) {
596 *tgt = DT_CPUADDR_TO_TARGET(cpuaddr);
597 *attr = DT_CPUADDR_TO_ATTR(cpuaddr);
605 static int mvebu_pcie_port_parse_dt(ofnode node, ofnode parent, struct mvebu_pcie *pcie)
607 struct fdt_pci_addr pci_addr;
613 /* Get port number, lane number and memory target / attr */
614 if (ofnode_read_u32(node, "marvell,pcie-port",
620 if (ofnode_read_u32(node, "marvell,pcie-lane", &pcie->lane))
623 sprintf(pcie->name, "pcie%d.%d", pcie->port, pcie->lane);
625 if (!ofnode_read_u32(node, "num-lanes", &num_lanes) && num_lanes == 4)
628 /* devfn is in bits [15:8], see PCI_DEV usage */
629 ret = ofnode_read_pci_addr(node, FDT_PCI_SPACE_CONFIG, "reg", &pci_addr);
631 printf("%s: property \"reg\" is invalid\n", pcie->name);
634 pcie->devfn = pci_addr.phys_hi & 0xff00;
636 ret = mvebu_get_tgt_attr(parent, pcie->devfn,
638 &pcie->mem_target, &pcie->mem_attr);
640 printf("%s: cannot get tgt/attr for mem window\n", pcie->name);
644 ret = mvebu_get_tgt_attr(parent, pcie->devfn,
646 &pcie->io_target, &pcie->io_attr);
648 printf("%s: cannot get tgt/attr for IO window\n", pcie->name);
652 /* Parse PCIe controller register base from DT */
653 addr = ofnode_get_property(node, "assigned-addresses", &len);
655 printf("%s: property \"assigned-addresses\" not found\n", pcie->name);
656 ret = -FDT_ERR_NOTFOUND;
660 pcie->base = (void *)(u32)ofnode_translate_address(node, addr);
661 pcie->intregs = (u32)pcie->base - fdt32_to_cpu(addr[2]);
669 static const struct dm_pci_ops mvebu_pcie_ops = {
670 .read_config = mvebu_pcie_read_config,
671 .write_config = mvebu_pcie_write_config,
674 static struct driver pcie_mvebu_drv = {
675 .name = "pcie_mvebu",
677 .ops = &mvebu_pcie_ops,
678 .probe = mvebu_pcie_probe,
679 .plat_auto = sizeof(struct mvebu_pcie),
683 * Use a MISC device to bind the n instances (child nodes) of the
684 * PCIe base controller in UCLASS_PCI.
686 static int mvebu_pcie_bind(struct udevice *parent)
688 struct mvebu_pcie **ports_pcie;
689 struct mvebu_pcie *pcie;
690 struct uclass_driver *drv;
698 /* Lookup pci driver */
699 drv = lists_uclass_lookup(UCLASS_PCI);
701 puts("Cannot find PCI driver\n");
705 ports_count = ofnode_get_child_count(dev_ofnode(parent));
706 ports_pcie = calloc(ports_count, sizeof(*ports_pcie));
707 ports_nodes = calloc(ports_count, sizeof(*ports_nodes));
708 if (!ports_pcie || !ports_nodes) {
715 #ifdef CONFIG_ARCH_KIRKWOOD
716 mem.start = KW_DEFADR_PCI_MEM;
717 mem.end = KW_DEFADR_PCI_MEM + KW_DEFADR_PCI_MEM_SIZE - 1;
718 io.start = KW_DEFADR_PCI_IO;
719 io.end = KW_DEFADR_PCI_IO + KW_DEFADR_PCI_IO_SIZE - 1;
721 mem.start = MBUS_PCI_MEM_BASE;
722 mem.end = MBUS_PCI_MEM_BASE + MBUS_PCI_MEM_SIZE - 1;
723 io.start = MBUS_PCI_IO_BASE;
724 io.end = MBUS_PCI_IO_BASE + MBUS_PCI_IO_SIZE - 1;
727 /* First phase: Fill mvebu_pcie struct for each port */
728 ofnode_for_each_subnode(subnode, dev_ofnode(parent)) {
729 if (!ofnode_is_available(subnode))
732 pcie = calloc(1, sizeof(*pcie));
736 if (mvebu_pcie_port_parse_dt(subnode, dev_ofnode(parent), pcie) < 0) {
742 * MVEBU PCIe controller needs MEMORY and I/O BARs to be mapped
743 * into SoCs address space. Each controller will map 128M of MEM
744 * and 64K of I/O space when registered.
747 if (resource_size(&mem) >= SZ_128M) {
748 pcie->mem.start = mem.start;
749 pcie->mem.end = mem.start + SZ_128M - 1;
750 mem.start += SZ_128M;
752 printf("%s: unable to assign mbus window for mem\n", pcie->name);
757 if (resource_size(&io) >= SZ_64K) {
758 pcie->io.start = io.start;
759 pcie->io.end = io.start + SZ_64K - 1;
762 printf("%s: unable to assign mbus window for io\n", pcie->name);
767 ports_pcie[ports_count] = pcie;
768 ports_nodes[ports_count] = subnode;
772 /* Second phase: Setup all PCIe links (do not enable them yet) */
773 for (i = 0; i < ports_count; i++)
774 mvebu_pcie_setup_link(ports_pcie[i]);
776 /* Third phase: Enable all PCIe links and create for each UCLASS_PCI device */
777 for (i = 0; i < ports_count; i++) {
778 pcie = ports_pcie[i];
779 subnode = ports_nodes[i];
782 * PCIe link can be enabled only after all PCIe links were
783 * properly configured. This is because more PCIe links shares
784 * one enable bit and some PCIe links cannot be enabled
787 if (mvebu_pcie_enable_link(pcie, subnode) < 0) {
792 /* Create child device UCLASS_PCI and bind it */
793 device_bind(parent, &pcie_mvebu_drv, pcie->name, pcie, subnode,
803 static const struct udevice_id mvebu_pcie_ids[] = {
804 { .compatible = "marvell,armada-xp-pcie" },
805 { .compatible = "marvell,armada-370-pcie" },
806 { .compatible = "marvell,kirkwood-pcie" },
810 U_BOOT_DRIVER(pcie_mvebu_base) = {
811 .name = "pcie_mvebu_base",
813 .of_match = mvebu_pcie_ids,
814 .bind = mvebu_pcie_bind,