1 // SPDX-License-Identifier: GPL-2.0
3 * PCIe driver for Marvell MVEBU SoCs
5 * Based on Barebox drivers/pci/pci-mvebu.c
8 * Anton Schubert <anton.schubert@gmx.de>
9 * Stefan Roese <sr@denx.de>
10 * Pali Rohár <pali@kernel.org>
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 SELECT(x, n) ((x >> n) & 1UL)
35 #define PCIE_DEV_ID_OFF 0x0000
36 #define PCIE_CMD_OFF 0x0004
37 #define PCIE_DEV_REV_OFF 0x0008
38 #define PCIE_BAR_LO_OFF(n) (0x0010 + ((n) << 3))
39 #define PCIE_BAR_HI_OFF(n) (0x0014 + ((n) << 3))
40 #define PCIE_EXP_ROM_BAR_OFF 0x0030
41 #define PCIE_CAPAB_OFF 0x0060
42 #define PCIE_CTRL_STAT_OFF 0x0068
43 #define PCIE_HEADER_LOG_4_OFF 0x0128
44 #define PCIE_BAR_CTRL_OFF(n) (0x1804 + (((n) - 1) * 4))
45 #define PCIE_WIN04_CTRL_OFF(n) (0x1820 + ((n) << 4))
46 #define PCIE_WIN04_BASE_OFF(n) (0x1824 + ((n) << 4))
47 #define PCIE_WIN04_REMAP_OFF(n) (0x182c + ((n) << 4))
48 #define PCIE_WIN5_CTRL_OFF 0x1880
49 #define PCIE_WIN5_BASE_OFF 0x1884
50 #define PCIE_WIN5_REMAP_OFF 0x188c
51 #define PCIE_CONF_ADDR_OFF 0x18f8
52 #define PCIE_CONF_DATA_OFF 0x18fc
53 #define PCIE_MASK_OFF 0x1910
54 #define PCIE_MASK_ENABLE_INTS (0xf << 24)
55 #define PCIE_CTRL_OFF 0x1a00
56 #define PCIE_CTRL_X1_MODE BIT(0)
57 #define PCIE_CTRL_RC_MODE BIT(1)
58 #define PCIE_STAT_OFF 0x1a04
59 #define PCIE_STAT_BUS (0xff << 8)
60 #define PCIE_STAT_DEV (0x1f << 16)
61 #define PCIE_STAT_LINK_DOWN BIT(0)
62 #define PCIE_DEBUG_CTRL 0x1a60
63 #define PCIE_DEBUG_SOFT_RESET BIT(20)
65 #define LINK_WAIT_RETRIES 100
66 #define LINK_WAIT_TIMEOUT 1000
69 struct pci_controller hose;
71 void __iomem *membase;
84 unsigned int mem_target;
85 unsigned int mem_attr;
86 unsigned int io_target;
88 u32 cfgcache[(0x3c - 0x10) / 4];
91 static inline bool mvebu_pcie_link_up(struct mvebu_pcie *pcie)
94 val = readl(pcie->base + PCIE_STAT_OFF);
95 return !(val & PCIE_STAT_LINK_DOWN);
98 static void mvebu_pcie_wait_for_link(struct mvebu_pcie *pcie)
102 /* check if the link is up or not */
103 for (retries = 0; retries < LINK_WAIT_RETRIES; retries++) {
104 if (mvebu_pcie_link_up(pcie)) {
105 printf("%s: Link up\n", pcie->name);
109 udelay(LINK_WAIT_TIMEOUT);
112 printf("%s: Link down\n", pcie->name);
115 static void mvebu_pcie_set_local_bus_nr(struct mvebu_pcie *pcie, int busno)
119 stat = readl(pcie->base + PCIE_STAT_OFF);
120 stat &= ~PCIE_STAT_BUS;
122 writel(stat, pcie->base + PCIE_STAT_OFF);
125 static void mvebu_pcie_set_local_dev_nr(struct mvebu_pcie *pcie, int devno)
129 stat = readl(pcie->base + PCIE_STAT_OFF);
130 stat &= ~PCIE_STAT_DEV;
132 writel(stat, pcie->base + PCIE_STAT_OFF);
135 static inline struct mvebu_pcie *hose_to_pcie(struct pci_controller *hose)
137 return container_of(hose, struct mvebu_pcie, hose);
140 static bool mvebu_pcie_valid_addr(struct mvebu_pcie *pcie,
141 int busno, int dev, int func)
143 /* On primary bus is only one PCI Bridge */
144 if (busno == pcie->first_busno && (dev != 0 || func != 0))
147 /* Access to other buses is possible when link is up */
148 if (busno != pcie->first_busno && !mvebu_pcie_link_up(pcie))
151 /* On secondary bus can be only one PCIe device */
152 if (busno == pcie->sec_busno && dev != 0)
158 static int mvebu_pcie_read_config(const struct udevice *bus, pci_dev_t bdf,
159 uint offset, ulong *valuep,
160 enum pci_size_t size)
162 struct mvebu_pcie *pcie = dev_get_plat(bus);
163 int busno = PCI_BUS(bdf) - dev_seq(bus);
166 debug("PCIE CFG read: (b,d,f)=(%2d,%2d,%2d) ",
167 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
169 if (!mvebu_pcie_valid_addr(pcie, busno, PCI_DEV(bdf), PCI_FUNC(bdf))) {
170 debug("- out of range\n");
171 *valuep = pci_get_ff(size);
176 * The configuration space of the PCI Bridge on primary (first) bus is
177 * of Type 0 but the BAR registers (including ROM BAR) don't have the
178 * same meaning as in the PCIe specification. Therefore do not access
179 * BAR registers and non-common registers (those which have different
180 * meaning for Type 0 and Type 1 config space) of the PCI Bridge and
181 * instead read their content from driver virtual cfgcache[].
183 if (busno == pcie->first_busno && ((offset >= 0x10 && offset < 0x34) ||
184 (offset >= 0x38 && offset < 0x3c))) {
185 data = pcie->cfgcache[(offset - 0x10) / 4];
186 debug("(addr,size,val)=(0x%04x, %d, 0x%08x) from cfgcache\n",
188 *valuep = pci_conv_32_to_size(data, offset, size);
193 * PCI bridge is device 0 at primary bus but mvebu has it mapped on
194 * secondary bus with device number 1.
196 if (busno == pcie->first_busno)
197 addr = PCI_CONF1_EXT_ADDRESS(pcie->sec_busno, 1, 0, offset);
199 addr = PCI_CONF1_EXT_ADDRESS(busno, PCI_DEV(bdf), PCI_FUNC(bdf), offset);
202 writel(addr, pcie->base + PCIE_CONF_ADDR_OFF);
207 data = readb(pcie->base + PCIE_CONF_DATA_OFF + (offset & 3));
210 data = readw(pcie->base + PCIE_CONF_DATA_OFF + (offset & 2));
213 data = readl(pcie->base + PCIE_CONF_DATA_OFF);
219 if (busno == pcie->first_busno &&
220 (offset & ~3) == (PCI_HEADER_TYPE & ~3)) {
222 * Change Header Type of PCI Bridge device to Type 1
223 * (0x01, used by PCI Bridges) because mvebu reports
224 * Type 0 (0x00, used by Upstream and Endpoint devices).
226 data = pci_conv_size_to_32(data, 0, offset, size);
228 data |= PCI_HEADER_TYPE_BRIDGE << 16;
229 data = pci_conv_32_to_size(data, offset, size);
232 debug("(addr,size,val)=(0x%04x, %d, 0x%08x)\n", offset, size, data);
238 static int mvebu_pcie_write_config(struct udevice *bus, pci_dev_t bdf,
239 uint offset, ulong value,
240 enum pci_size_t size)
242 struct mvebu_pcie *pcie = dev_get_plat(bus);
243 int busno = PCI_BUS(bdf) - dev_seq(bus);
246 debug("PCIE CFG write: (b,d,f)=(%2d,%2d,%2d) ",
247 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
248 debug("(addr,size,val)=(0x%04x, %d, 0x%08lx)\n", offset, size, value);
250 if (!mvebu_pcie_valid_addr(pcie, busno, PCI_DEV(bdf), PCI_FUNC(bdf))) {
251 debug("- out of range\n");
256 * As explained in mvebu_pcie_read_config(), PCI Bridge Type 1 specific
257 * config registers are not available, so we write their content only
258 * into driver virtual cfgcache[].
259 * And as explained in mvebu_pcie_probe(), mvebu has its own specific
260 * way for configuring primary and secondary bus numbers.
262 if (busno == pcie->first_busno && ((offset >= 0x10 && offset < 0x34) ||
263 (offset >= 0x38 && offset < 0x3c))) {
264 debug("Writing to cfgcache only\n");
265 data = pcie->cfgcache[(offset - 0x10) / 4];
266 data = pci_conv_size_to_32(data, value, offset, size);
267 /* mvebu PCI bridge does not have configurable bars */
268 if ((offset & ~3) == PCI_BASE_ADDRESS_0 ||
269 (offset & ~3) == PCI_BASE_ADDRESS_1 ||
270 (offset & ~3) == PCI_ROM_ADDRESS1)
272 pcie->cfgcache[(offset - 0x10) / 4] = data;
273 /* mvebu has its own way how to set PCI primary bus number */
274 if (offset == PCI_PRIMARY_BUS) {
275 pcie->first_busno = data & 0xff;
276 debug("Primary bus number was changed to %d\n",
279 /* mvebu has its own way how to set PCI secondary bus number */
280 if (offset == PCI_SECONDARY_BUS ||
281 (offset == PCI_PRIMARY_BUS && size != PCI_SIZE_8)) {
282 pcie->sec_busno = (data >> 8) & 0xff;
283 mvebu_pcie_set_local_bus_nr(pcie, pcie->sec_busno);
284 debug("Secondary bus number was changed to %d\n",
291 * PCI bridge is device 0 at primary bus but mvebu has it mapped on
292 * secondary bus with device number 1.
294 if (busno == pcie->first_busno)
295 addr = PCI_CONF1_EXT_ADDRESS(pcie->sec_busno, 1, 0, offset);
297 addr = PCI_CONF1_EXT_ADDRESS(busno, PCI_DEV(bdf), PCI_FUNC(bdf), offset);
300 writel(addr, pcie->base + PCIE_CONF_ADDR_OFF);
305 writeb(value, pcie->base + PCIE_CONF_DATA_OFF + (offset & 3));
308 writew(value, pcie->base + PCIE_CONF_DATA_OFF + (offset & 2));
311 writel(value, pcie->base + PCIE_CONF_DATA_OFF);
321 * Setup PCIE BARs and Address Decode Wins:
322 * BAR[0] -> internal registers
323 * BAR[1] -> covers all DRAM banks
325 * WIN[0-3] -> DRAM bank[0-3]
327 static void mvebu_pcie_setup_wins(struct mvebu_pcie *pcie)
329 const struct mbus_dram_target_info *dram = mvebu_mbus_dram_info();
333 /* First, disable and clear BARs and windows. */
334 for (i = 1; i < 3; i++) {
335 writel(0, pcie->base + PCIE_BAR_CTRL_OFF(i));
336 writel(0, pcie->base + PCIE_BAR_LO_OFF(i));
337 writel(0, pcie->base + PCIE_BAR_HI_OFF(i));
340 for (i = 0; i < 5; i++) {
341 writel(0, pcie->base + PCIE_WIN04_CTRL_OFF(i));
342 writel(0, pcie->base + PCIE_WIN04_BASE_OFF(i));
343 writel(0, pcie->base + PCIE_WIN04_REMAP_OFF(i));
346 writel(0, pcie->base + PCIE_WIN5_CTRL_OFF);
347 writel(0, pcie->base + PCIE_WIN5_BASE_OFF);
348 writel(0, pcie->base + PCIE_WIN5_REMAP_OFF);
350 /* Setup windows for DDR banks. Count total DDR size on the fly. */
352 for (i = 0; i < dram->num_cs; i++) {
353 const struct mbus_dram_window *cs = dram->cs + i;
355 writel(cs->base & 0xffff0000,
356 pcie->base + PCIE_WIN04_BASE_OFF(i));
357 writel(0, pcie->base + PCIE_WIN04_REMAP_OFF(i));
358 writel(((cs->size - 1) & 0xffff0000) |
359 (cs->mbus_attr << 8) |
360 (dram->mbus_dram_target_id << 4) | 1,
361 pcie->base + PCIE_WIN04_CTRL_OFF(i));
366 /* Round up 'size' to the nearest power of two. */
367 if ((size & (size - 1)) != 0)
368 size = 1 << fls(size);
370 /* Setup BAR[1] to all DRAM banks. */
371 writel(dram->cs[0].base | 0xc, pcie->base + PCIE_BAR_LO_OFF(1));
372 writel(0, pcie->base + PCIE_BAR_HI_OFF(1));
373 writel(((size - 1) & 0xffff0000) | 0x1,
374 pcie->base + PCIE_BAR_CTRL_OFF(1));
376 /* Setup BAR[0] to internal registers. */
377 writel(pcie->intregs, pcie->base + PCIE_BAR_LO_OFF(0));
378 writel(0, pcie->base + PCIE_BAR_HI_OFF(0));
381 /* Only enable PCIe link, do not setup it */
382 static int mvebu_pcie_enable_link(struct mvebu_pcie *pcie, ofnode node)
384 struct reset_ctl rst;
387 ret = reset_get_by_index_nodev(node, 0, &rst);
388 if (ret == -ENOENT) {
390 } else if (ret < 0) {
391 printf("%s: cannot get reset controller: %d\n", pcie->name, ret);
395 ret = reset_request(&rst);
397 printf("%s: cannot request reset controller: %d\n", pcie->name, ret);
401 ret = reset_deassert(&rst);
404 printf("%s: cannot enable PCIe port: %d\n", pcie->name, ret);
411 /* Setup PCIe link but do not enable it */
412 static void mvebu_pcie_setup_link(struct mvebu_pcie *pcie)
416 /* Setup PCIe controller to Root Complex mode */
417 reg = readl(pcie->base + PCIE_CTRL_OFF);
418 reg |= PCIE_CTRL_RC_MODE;
419 writel(reg, pcie->base + PCIE_CTRL_OFF);
422 * Set Maximum Link Width to X1 or X4 in Root Port's PCIe Link
423 * Capability register. This register is defined by PCIe specification
424 * as read-only but this mvebu controller has it as read-write and must
425 * be set to number of SerDes PCIe lanes (1 or 4). If this register is
426 * not set correctly then link with endpoint card is not established.
428 reg = readl(pcie->base + PCIE_CAPAB_OFF + PCI_EXP_LNKCAP);
429 reg &= ~PCI_EXP_LNKCAP_MLW;
430 reg |= (pcie->is_x4 ? 4 : 1) << 4;
431 writel(reg, pcie->base + PCIE_CAPAB_OFF + PCI_EXP_LNKCAP);
434 static int mvebu_pcie_probe(struct udevice *dev)
436 struct mvebu_pcie *pcie = dev_get_plat(dev);
437 struct udevice *ctlr = pci_get_controller(dev);
438 struct pci_controller *hose = dev_get_uclass_priv(ctlr);
442 * Change Class Code of PCI Bridge device to PCI Bridge (0x600400)
443 * because default value is Memory controller (0x508000) which
444 * U-Boot cannot recognize as P2P Bridge.
446 * Note that this mvebu PCI Bridge does not have compliant Type 1
447 * Configuration Space. Header Type is reported as Type 0 and it
448 * has format of Type 0 config space.
450 * Moreover Type 0 BAR registers (ranges 0x10 - 0x28 and 0x30 - 0x34)
451 * have the same format in Marvell's specification as in PCIe
452 * specification, but their meaning is totally different and they do
453 * different things: they are aliased into internal mvebu registers
454 * (e.g. PCIE_BAR_LO_OFF) and these should not be changed or
455 * reconfigured by pci device drivers.
457 * So our driver converts Type 0 config space to Type 1 and reports
458 * Header Type as Type 1. Access to BAR registers and to non-existent
459 * Type 1 registers is redirected to the virtual cfgcache[] buffer,
460 * which avoids changing unrelated registers.
462 reg = readl(pcie->base + PCIE_DEV_REV_OFF);
464 reg |= (PCI_CLASS_BRIDGE_PCI << 8) << 8;
465 writel(reg, pcie->base + PCIE_DEV_REV_OFF);
468 * mvebu uses local bus number and local device number to determinate
469 * type of config request. Type 0 is used if target bus number equals
470 * local bus number and target device number differs from local device
471 * number. Type 1 is used if target bus number differs from local bus
472 * number. And when target bus number equals local bus number and
473 * target device equals local device number then request is routed to
474 * PCI Bridge which represent local PCIe Root Port.
476 * It means that PCI primary and secondary buses shares one bus number
477 * which is configured via local bus number. Determination if config
478 * request should go to primary or secondary bus is done based on local
481 * PCIe is point-to-point bus, so at secondary bus is always exactly one
482 * device with number 0. So set local device number to 1, it would not
483 * conflict with any device on secondary bus number and will ensure that
484 * accessing secondary bus and all buses behind secondary would work
485 * automatically and correctly. Therefore this configuration of local
486 * device number implies that setting of local bus number configures
487 * secondary bus number. Set it to 0 as U-Boot CONFIG_PCI_PNP code will
488 * later configure it via config write requests to the correct value.
489 * mvebu_pcie_write_config() catches config write requests which tries
490 * to change primary/secondary bus number and correctly updates local
491 * bus number based on new secondary bus number.
493 * With this configuration is PCI Bridge available at secondary bus as
494 * device number 1. But it must be available at primary bus as device
495 * number 0. So in mvebu_pcie_read_config() and mvebu_pcie_write_config()
496 * functions rewrite address to the real one when accessing primary bus.
498 mvebu_pcie_set_local_bus_nr(pcie, 0);
499 mvebu_pcie_set_local_dev_nr(pcie, 1);
501 if (resource_size(&pcie->mem) &&
502 mvebu_mbus_add_window_by_id(pcie->mem_target, pcie->mem_attr,
503 (phys_addr_t)pcie->mem.start,
504 resource_size(&pcie->mem))) {
505 printf("%s: unable to add mbus window for mem at %08x+%08x\n",
507 (u32)pcie->mem.start, (unsigned)resource_size(&pcie->mem));
512 if (resource_size(&pcie->io) &&
513 mvebu_mbus_add_window_by_id(pcie->io_target, pcie->io_attr,
514 (phys_addr_t)pcie->io.start,
515 resource_size(&pcie->io))) {
516 printf("%s: unable to add mbus window for IO at %08x+%08x\n",
518 (u32)pcie->io.start, (unsigned)resource_size(&pcie->io));
523 /* Setup windows and configure host bridge */
524 mvebu_pcie_setup_wins(pcie);
526 /* PCI memory space */
527 pci_set_region(hose->regions + 0, pcie->mem.start,
528 pcie->mem.start, resource_size(&pcie->mem), PCI_REGION_MEM);
529 hose->region_count = 1;
531 if (resource_size(&pcie->mem)) {
532 pci_set_region(hose->regions + hose->region_count,
533 pcie->mem.start, pcie->mem.start,
534 resource_size(&pcie->mem),
536 hose->region_count++;
539 if (resource_size(&pcie->io)) {
540 pci_set_region(hose->regions + hose->region_count,
541 pcie->io.start, pcie->io.start,
542 resource_size(&pcie->io),
544 hose->region_count++;
547 /* PCI Bridge support 32-bit I/O and 64-bit prefetch mem addressing */
548 pcie->cfgcache[(PCI_IO_BASE - 0x10) / 4] =
549 PCI_IO_RANGE_TYPE_32 | (PCI_IO_RANGE_TYPE_32 << 8);
550 pcie->cfgcache[(PCI_PREF_MEMORY_BASE - 0x10) / 4] =
551 PCI_PREF_RANGE_TYPE_64 | (PCI_PREF_RANGE_TYPE_64 << 16);
553 mvebu_pcie_wait_for_link(pcie);
558 #define DT_FLAGS_TO_TYPE(flags) (((flags) >> 24) & 0x03)
559 #define DT_TYPE_IO 0x1
560 #define DT_TYPE_MEM32 0x2
561 #define DT_CPUADDR_TO_TARGET(cpuaddr) (((cpuaddr) >> 56) & 0xFF)
562 #define DT_CPUADDR_TO_ATTR(cpuaddr) (((cpuaddr) >> 48) & 0xFF)
564 static int mvebu_get_tgt_attr(ofnode node, int devfn,
569 const int na = 3, ns = 2;
571 int rlen, nranges, rangesz, pna, i;
576 range = ofnode_get_property(node, "ranges", &rlen);
581 * Linux uses of_n_addr_cells() to get the number of address cells
582 * here. Currently this function is only available in U-Boot when
583 * CONFIG_OF_LIVE is enabled. Until this is enabled for MVEBU in
584 * general, lets't hardcode the "pna" value in the U-Boot code.
586 pna = 2; /* hardcoded for now because of lack of of_n_addr_cells() */
587 rangesz = pna + na + ns;
588 nranges = rlen / sizeof(__be32) / rangesz;
590 for (i = 0; i < nranges; i++, range += rangesz) {
591 u32 flags = of_read_number(range, 1);
592 u32 slot = of_read_number(range + 1, 1);
593 u64 cpuaddr = of_read_number(range + na, pna);
596 if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_IO)
597 rtype = IORESOURCE_IO;
598 else if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_MEM32)
599 rtype = IORESOURCE_MEM;
604 * The Linux code used PCI_SLOT() here, which expects devfn
605 * in bits 7..0. PCI_DEV() in U-Boot is similar to PCI_SLOT(),
606 * only expects devfn in 15..8, where its saved in this driver.
608 if (slot == PCI_DEV(devfn) && type == rtype) {
609 *tgt = DT_CPUADDR_TO_TARGET(cpuaddr);
610 *attr = DT_CPUADDR_TO_ATTR(cpuaddr);
618 static int mvebu_pcie_port_parse_dt(ofnode node, ofnode parent, struct mvebu_pcie *pcie)
620 struct fdt_pci_addr pci_addr;
626 /* Get port number, lane number and memory target / attr */
627 if (ofnode_read_u32(node, "marvell,pcie-port",
633 if (ofnode_read_u32(node, "marvell,pcie-lane", &pcie->lane))
636 sprintf(pcie->name, "pcie%d.%d", pcie->port, pcie->lane);
638 if (!ofnode_read_u32(node, "num-lanes", &num_lanes) && num_lanes == 4)
641 /* devfn is in bits [15:8], see PCI_DEV usage */
642 ret = ofnode_read_pci_addr(node, FDT_PCI_SPACE_CONFIG, "reg", &pci_addr);
644 printf("%s: property \"reg\" is invalid\n", pcie->name);
647 pcie->devfn = pci_addr.phys_hi & 0xff00;
649 ret = mvebu_get_tgt_attr(parent, pcie->devfn,
651 &pcie->mem_target, &pcie->mem_attr);
653 printf("%s: cannot get tgt/attr for mem window\n", pcie->name);
657 ret = mvebu_get_tgt_attr(parent, pcie->devfn,
659 &pcie->io_target, &pcie->io_attr);
661 printf("%s: cannot get tgt/attr for IO window\n", pcie->name);
665 /* Parse PCIe controller register base from DT */
666 addr = ofnode_get_property(node, "assigned-addresses", &len);
668 printf("%s: property \"assigned-addresses\" not found\n", pcie->name);
669 ret = -FDT_ERR_NOTFOUND;
673 pcie->base = (void *)(u32)ofnode_translate_address(node, addr);
674 pcie->intregs = (u32)pcie->base - fdt32_to_cpu(addr[2]);
682 static const struct dm_pci_ops mvebu_pcie_ops = {
683 .read_config = mvebu_pcie_read_config,
684 .write_config = mvebu_pcie_write_config,
687 static struct driver pcie_mvebu_drv = {
688 .name = "pcie_mvebu",
690 .ops = &mvebu_pcie_ops,
691 .probe = mvebu_pcie_probe,
692 .plat_auto = sizeof(struct mvebu_pcie),
696 * Use a MISC device to bind the n instances (child nodes) of the
697 * PCIe base controller in UCLASS_PCI.
699 static int mvebu_pcie_bind(struct udevice *parent)
701 struct mvebu_pcie **ports_pcie;
702 struct mvebu_pcie *pcie;
703 struct uclass_driver *drv;
711 /* Lookup pci driver */
712 drv = lists_uclass_lookup(UCLASS_PCI);
714 puts("Cannot find PCI driver\n");
718 ports_count = ofnode_get_child_count(dev_ofnode(parent));
719 ports_pcie = calloc(ports_count, sizeof(*ports_pcie));
720 ports_nodes = calloc(ports_count, sizeof(*ports_nodes));
721 if (!ports_pcie || !ports_nodes) {
728 mem.start = MBUS_PCI_MEM_BASE;
729 mem.end = MBUS_PCI_MEM_BASE + MBUS_PCI_MEM_SIZE - 1;
730 io.start = MBUS_PCI_IO_BASE;
731 io.end = MBUS_PCI_IO_BASE + MBUS_PCI_IO_SIZE - 1;
733 /* First phase: Fill mvebu_pcie struct for each port */
734 ofnode_for_each_subnode(subnode, dev_ofnode(parent)) {
735 if (!ofnode_is_available(subnode))
738 pcie = calloc(1, sizeof(*pcie));
742 if (mvebu_pcie_port_parse_dt(subnode, dev_ofnode(parent), pcie) < 0) {
748 * MVEBU PCIe controller needs MEMORY and I/O BARs to be mapped
749 * into SoCs address space. Each controller will map 128M of MEM
750 * and 64K of I/O space when registered.
753 if (resource_size(&mem) >= SZ_128M) {
754 pcie->mem.start = mem.start;
755 pcie->mem.end = mem.start + SZ_128M - 1;
756 mem.start += SZ_128M;
758 printf("%s: unable to assign mbus window for mem\n", pcie->name);
763 if (resource_size(&io) >= SZ_64K) {
764 pcie->io.start = io.start;
765 pcie->io.end = io.start + SZ_64K - 1;
768 printf("%s: unable to assign mbus window for io\n", pcie->name);
773 ports_pcie[ports_count] = pcie;
774 ports_nodes[ports_count] = subnode;
778 /* Second phase: Setup all PCIe links (do not enable them yet) */
779 for (i = 0; i < ports_count; i++)
780 mvebu_pcie_setup_link(ports_pcie[i]);
782 /* Third phase: Enable all PCIe links and create for each UCLASS_PCI device */
783 for (i = 0; i < ports_count; i++) {
784 pcie = ports_pcie[i];
785 subnode = ports_nodes[i];
788 * PCIe link can be enabled only after all PCIe links were
789 * properly configured. This is because more PCIe links shares
790 * one enable bit and some PCIe links cannot be enabled
793 if (mvebu_pcie_enable_link(pcie, subnode) < 0) {
798 /* Create child device UCLASS_PCI and bind it */
799 device_bind(parent, &pcie_mvebu_drv, pcie->name, pcie, subnode,
809 static const struct udevice_id mvebu_pcie_ids[] = {
810 { .compatible = "marvell,armada-xp-pcie" },
811 { .compatible = "marvell,armada-370-pcie" },
815 U_BOOT_DRIVER(pcie_mvebu_base) = {
816 .name = "pcie_mvebu_base",
818 .of_match = mvebu_pcie_ids,
819 .bind = mvebu_pcie_bind,