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 PCIE_DEV_ID_OFF 0x0000
34 #define PCIE_CMD_OFF 0x0004
35 #define PCIE_DEV_REV_OFF 0x0008
36 #define PCIE_BAR_LO_OFF(n) (0x0010 + ((n) << 3))
37 #define PCIE_BAR_HI_OFF(n) (0x0014 + ((n) << 3))
38 #define PCIE_EXP_ROM_BAR_OFF 0x0030
39 #define PCIE_CAPAB_OFF 0x0060
40 #define PCIE_CTRL_STAT_OFF 0x0068
41 #define PCIE_HEADER_LOG_4_OFF 0x0128
42 #define PCIE_BAR_CTRL_OFF(n) (0x1804 + (((n) - 1) * 4))
43 #define PCIE_WIN04_CTRL_OFF(n) (0x1820 + ((n) << 4))
44 #define PCIE_WIN04_BASE_OFF(n) (0x1824 + ((n) << 4))
45 #define PCIE_WIN04_REMAP_OFF(n) (0x182c + ((n) << 4))
46 #define PCIE_WIN5_CTRL_OFF 0x1880
47 #define PCIE_WIN5_BASE_OFF 0x1884
48 #define PCIE_WIN5_REMAP_OFF 0x188c
49 #define PCIE_CONF_ADDR_OFF 0x18f8
50 #define PCIE_CONF_DATA_OFF 0x18fc
51 #define PCIE_MASK_OFF 0x1910
52 #define PCIE_MASK_ENABLE_INTS (0xf << 24)
53 #define PCIE_CTRL_OFF 0x1a00
54 #define PCIE_CTRL_X1_MODE BIT(0)
55 #define PCIE_CTRL_RC_MODE BIT(1)
56 #define PCIE_STAT_OFF 0x1a04
57 #define PCIE_STAT_BUS (0xff << 8)
58 #define PCIE_STAT_DEV (0x1f << 16)
59 #define PCIE_STAT_LINK_DOWN BIT(0)
60 #define PCIE_DEBUG_CTRL 0x1a60
61 #define PCIE_DEBUG_SOFT_RESET BIT(20)
63 #define LINK_WAIT_RETRIES 100
64 #define LINK_WAIT_TIMEOUT 1000
67 struct pci_controller hose;
69 void __iomem *membase;
80 unsigned int mem_target;
81 unsigned int mem_attr;
82 unsigned int io_target;
84 u32 cfgcache[(0x3c - 0x10) / 4];
87 static inline bool mvebu_pcie_link_up(struct mvebu_pcie *pcie)
90 val = readl(pcie->base + PCIE_STAT_OFF);
91 return !(val & PCIE_STAT_LINK_DOWN);
94 static void mvebu_pcie_wait_for_link(struct mvebu_pcie *pcie)
98 /* check if the link is up or not */
99 for (retries = 0; retries < LINK_WAIT_RETRIES; retries++) {
100 if (mvebu_pcie_link_up(pcie)) {
101 printf("%s: Link up\n", pcie->name);
105 udelay(LINK_WAIT_TIMEOUT);
108 printf("%s: Link down\n", pcie->name);
111 static void mvebu_pcie_set_local_bus_nr(struct mvebu_pcie *pcie, int busno)
115 stat = readl(pcie->base + PCIE_STAT_OFF);
116 stat &= ~PCIE_STAT_BUS;
118 writel(stat, pcie->base + PCIE_STAT_OFF);
121 static void mvebu_pcie_set_local_dev_nr(struct mvebu_pcie *pcie, int devno)
125 stat = readl(pcie->base + PCIE_STAT_OFF);
126 stat &= ~PCIE_STAT_DEV;
128 writel(stat, pcie->base + PCIE_STAT_OFF);
131 static inline struct mvebu_pcie *hose_to_pcie(struct pci_controller *hose)
133 return container_of(hose, struct mvebu_pcie, hose);
136 static bool mvebu_pcie_valid_addr(struct mvebu_pcie *pcie,
137 int busno, int dev, int func)
139 /* On the root bus is only one PCI Bridge */
140 if (busno == 0 && (dev != 0 || func != 0))
143 /* Access to other buses is possible when link is up */
144 if (busno != 0 && !mvebu_pcie_link_up(pcie))
147 /* On secondary bus can be only one PCIe device */
148 if (busno == pcie->sec_busno && dev != 0)
154 static int mvebu_pcie_read_config(const struct udevice *bus, pci_dev_t bdf,
155 uint offset, ulong *valuep,
156 enum pci_size_t size)
158 struct mvebu_pcie *pcie = dev_get_plat(bus);
159 int busno = PCI_BUS(bdf) - dev_seq(bus);
162 debug("PCIE CFG read: (b,d,f)=(%2d,%2d,%2d) ",
163 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
165 if (!mvebu_pcie_valid_addr(pcie, busno, PCI_DEV(bdf), PCI_FUNC(bdf))) {
166 debug("- out of range\n");
167 *valuep = pci_get_ff(size);
172 * The configuration space of the PCI Bridge on the root bus (zero) is
173 * of Type 0 but the BAR registers (including ROM BAR) don't have the
174 * same meaning as in the PCIe specification. Therefore do not access
175 * BAR registers and non-common registers (those which have different
176 * meaning for Type 0 and Type 1 config space) of the PCI Bridge and
177 * instead read their content from driver virtual cfgcache[].
179 if (busno == 0 && ((offset >= 0x10 && offset < 0x34) ||
180 (offset >= 0x38 && offset < 0x3c))) {
181 data = pcie->cfgcache[(offset - 0x10) / 4];
182 debug("(addr,size,val)=(0x%04x, %d, 0x%08x) from cfgcache\n",
184 *valuep = pci_conv_32_to_size(data, offset, size);
189 * PCI bridge is device 0 at the root bus (zero) but mvebu has it
190 * mapped on secondary bus with device number 1.
193 addr = PCI_CONF1_EXT_ADDRESS(pcie->sec_busno, 1, 0, offset);
195 addr = PCI_CONF1_EXT_ADDRESS(busno, PCI_DEV(bdf), PCI_FUNC(bdf), offset);
198 writel(addr, pcie->base + PCIE_CONF_ADDR_OFF);
203 data = readb(pcie->base + PCIE_CONF_DATA_OFF + (offset & 3));
206 data = readw(pcie->base + PCIE_CONF_DATA_OFF + (offset & 2));
209 data = readl(pcie->base + PCIE_CONF_DATA_OFF);
215 if (busno == 0 && (offset & ~3) == (PCI_HEADER_TYPE & ~3)) {
217 * Change Header Type of PCI Bridge device to Type 1
218 * (0x01, used by PCI Bridges) because mvebu reports
219 * Type 0 (0x00, used by Upstream and Endpoint devices).
221 data = pci_conv_size_to_32(data, 0, offset, size);
223 data |= PCI_HEADER_TYPE_BRIDGE << 16;
224 data = pci_conv_32_to_size(data, offset, size);
227 debug("(addr,size,val)=(0x%04x, %d, 0x%08x)\n", offset, size, data);
233 static int mvebu_pcie_write_config(struct udevice *bus, pci_dev_t bdf,
234 uint offset, ulong value,
235 enum pci_size_t size)
237 struct mvebu_pcie *pcie = dev_get_plat(bus);
238 int busno = PCI_BUS(bdf) - dev_seq(bus);
241 debug("PCIE CFG write: (b,d,f)=(%2d,%2d,%2d) ",
242 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
243 debug("(addr,size,val)=(0x%04x, %d, 0x%08lx)\n", offset, size, value);
245 if (!mvebu_pcie_valid_addr(pcie, busno, PCI_DEV(bdf), PCI_FUNC(bdf))) {
246 debug("- out of range\n");
251 * As explained in mvebu_pcie_read_config(), PCI Bridge Type 1 specific
252 * config registers are not available, so we write their content only
253 * into driver virtual cfgcache[].
254 * And as explained in mvebu_pcie_probe(), mvebu has its own specific
255 * way for configuring secondary bus number.
257 if (busno == 0 && ((offset >= 0x10 && offset < 0x34) ||
258 (offset >= 0x38 && offset < 0x3c))) {
259 debug("Writing to cfgcache only\n");
260 data = pcie->cfgcache[(offset - 0x10) / 4];
261 data = pci_conv_size_to_32(data, value, offset, size);
262 /* mvebu PCI bridge does not have configurable bars */
263 if ((offset & ~3) == PCI_BASE_ADDRESS_0 ||
264 (offset & ~3) == PCI_BASE_ADDRESS_1 ||
265 (offset & ~3) == PCI_ROM_ADDRESS1)
267 pcie->cfgcache[(offset - 0x10) / 4] = data;
268 /* mvebu has its own way how to set PCI secondary bus number */
269 if (offset == PCI_SECONDARY_BUS ||
270 (offset == PCI_PRIMARY_BUS && size != PCI_SIZE_8)) {
271 pcie->sec_busno = (data >> 8) & 0xff;
272 mvebu_pcie_set_local_bus_nr(pcie, pcie->sec_busno);
273 debug("Secondary bus number was changed to %d\n",
280 * PCI bridge is device 0 at the root bus (zero) but mvebu has it
281 * mapped on secondary bus with device number 1.
284 addr = PCI_CONF1_EXT_ADDRESS(pcie->sec_busno, 1, 0, offset);
286 addr = PCI_CONF1_EXT_ADDRESS(busno, PCI_DEV(bdf), PCI_FUNC(bdf), offset);
289 writel(addr, pcie->base + PCIE_CONF_ADDR_OFF);
294 writeb(value, pcie->base + PCIE_CONF_DATA_OFF + (offset & 3));
297 writew(value, pcie->base + PCIE_CONF_DATA_OFF + (offset & 2));
300 writel(value, pcie->base + PCIE_CONF_DATA_OFF);
310 * Setup PCIE BARs and Address Decode Wins:
311 * BAR[0] -> internal registers
312 * BAR[1] -> covers all DRAM banks
314 * WIN[0-3] -> DRAM bank[0-3]
316 static void mvebu_pcie_setup_wins(struct mvebu_pcie *pcie)
318 const struct mbus_dram_target_info *dram = mvebu_mbus_dram_info();
322 /* First, disable and clear BARs and windows. */
323 for (i = 1; i < 3; i++) {
324 writel(0, pcie->base + PCIE_BAR_CTRL_OFF(i));
325 writel(0, pcie->base + PCIE_BAR_LO_OFF(i));
326 writel(0, pcie->base + PCIE_BAR_HI_OFF(i));
329 for (i = 0; i < 5; i++) {
330 writel(0, pcie->base + PCIE_WIN04_CTRL_OFF(i));
331 writel(0, pcie->base + PCIE_WIN04_BASE_OFF(i));
332 writel(0, pcie->base + PCIE_WIN04_REMAP_OFF(i));
335 writel(0, pcie->base + PCIE_WIN5_CTRL_OFF);
336 writel(0, pcie->base + PCIE_WIN5_BASE_OFF);
337 writel(0, pcie->base + PCIE_WIN5_REMAP_OFF);
339 /* Setup windows for DDR banks. Count total DDR size on the fly. */
341 for (i = 0; i < dram->num_cs; i++) {
342 const struct mbus_dram_window *cs = dram->cs + i;
344 writel(cs->base & 0xffff0000,
345 pcie->base + PCIE_WIN04_BASE_OFF(i));
346 writel(0, pcie->base + PCIE_WIN04_REMAP_OFF(i));
347 writel(((cs->size - 1) & 0xffff0000) |
348 (cs->mbus_attr << 8) |
349 (dram->mbus_dram_target_id << 4) | 1,
350 pcie->base + PCIE_WIN04_CTRL_OFF(i));
355 /* Round up 'size' to the nearest power of two. */
356 if ((size & (size - 1)) != 0)
357 size = 1 << fls(size);
359 /* Setup BAR[1] to all DRAM banks. */
360 writel(dram->cs[0].base | 0xc, pcie->base + PCIE_BAR_LO_OFF(1));
361 writel(0, pcie->base + PCIE_BAR_HI_OFF(1));
362 writel(((size - 1) & 0xffff0000) | 0x1,
363 pcie->base + PCIE_BAR_CTRL_OFF(1));
365 /* Setup BAR[0] to internal registers. */
366 writel(pcie->intregs, pcie->base + PCIE_BAR_LO_OFF(0));
367 writel(0, pcie->base + PCIE_BAR_HI_OFF(0));
370 /* Only enable PCIe link, do not setup it */
371 static int mvebu_pcie_enable_link(struct mvebu_pcie *pcie, ofnode node)
373 struct reset_ctl rst;
376 ret = reset_get_by_index_nodev(node, 0, &rst);
377 if (ret == -ENOENT) {
379 } else if (ret < 0) {
380 printf("%s: cannot get reset controller: %d\n", pcie->name, ret);
384 ret = reset_request(&rst);
386 printf("%s: cannot request reset controller: %d\n", pcie->name, ret);
390 ret = reset_deassert(&rst);
393 printf("%s: cannot enable PCIe port: %d\n", pcie->name, ret);
400 /* Setup PCIe link but do not enable it */
401 static void mvebu_pcie_setup_link(struct mvebu_pcie *pcie)
405 /* Setup PCIe controller to Root Complex mode */
406 reg = readl(pcie->base + PCIE_CTRL_OFF);
407 reg |= PCIE_CTRL_RC_MODE;
408 writel(reg, pcie->base + PCIE_CTRL_OFF);
411 * Set Maximum Link Width to X1 or X4 in Root Port's PCIe Link
412 * Capability register. This register is defined by PCIe specification
413 * as read-only but this mvebu controller has it as read-write and must
414 * be set to number of SerDes PCIe lanes (1 or 4). If this register is
415 * not set correctly then link with endpoint card is not established.
417 reg = readl(pcie->base + PCIE_CAPAB_OFF + PCI_EXP_LNKCAP);
418 reg &= ~PCI_EXP_LNKCAP_MLW;
419 reg |= (pcie->is_x4 ? 4 : 1) << 4;
420 writel(reg, pcie->base + PCIE_CAPAB_OFF + PCI_EXP_LNKCAP);
423 static int mvebu_pcie_probe(struct udevice *dev)
425 struct mvebu_pcie *pcie = dev_get_plat(dev);
426 struct udevice *ctlr = pci_get_controller(dev);
427 struct pci_controller *hose = dev_get_uclass_priv(ctlr);
431 * Change Class Code of PCI Bridge device to PCI Bridge (0x600400)
432 * because default value is Memory controller (0x508000) which
433 * U-Boot cannot recognize as P2P Bridge.
435 * Note that this mvebu PCI Bridge does not have compliant Type 1
436 * Configuration Space. Header Type is reported as Type 0 and it
437 * has format of Type 0 config space.
439 * Moreover Type 0 BAR registers (ranges 0x10 - 0x28 and 0x30 - 0x34)
440 * have the same format in Marvell's specification as in PCIe
441 * specification, but their meaning is totally different and they do
442 * different things: they are aliased into internal mvebu registers
443 * (e.g. PCIE_BAR_LO_OFF) and these should not be changed or
444 * reconfigured by pci device drivers.
446 * So our driver converts Type 0 config space to Type 1 and reports
447 * Header Type as Type 1. Access to BAR registers and to non-existent
448 * Type 1 registers is redirected to the virtual cfgcache[] buffer,
449 * which avoids changing unrelated registers.
451 reg = readl(pcie->base + PCIE_DEV_REV_OFF);
453 reg |= (PCI_CLASS_BRIDGE_PCI << 8) << 8;
454 writel(reg, pcie->base + PCIE_DEV_REV_OFF);
457 * mvebu uses local bus number and local device number to determinate
458 * type of config request. Type 0 is used if target bus number equals
459 * local bus number and target device number differs from local device
460 * number. Type 1 is used if target bus number differs from local bus
461 * number. And when target bus number equals local bus number and
462 * target device equals local device number then request is routed to
463 * PCI Bridge which represent local PCIe Root Port.
465 * It means that PCI root and secondary buses shares one bus number
466 * which is configured via local bus number. Determination if config
467 * request should go to root or secondary bus is done based on local
470 * PCIe is point-to-point bus, so at secondary bus is always exactly one
471 * device with number 0. So set local device number to 1, it would not
472 * conflict with any device on secondary bus number and will ensure that
473 * accessing secondary bus and all buses behind secondary would work
474 * automatically and correctly. Therefore this configuration of local
475 * device number implies that setting of local bus number configures
476 * secondary bus number. Set it to 0 as U-Boot CONFIG_PCI_PNP code will
477 * later configure it via config write requests to the correct value.
478 * mvebu_pcie_write_config() catches config write requests which tries
479 * to change secondary bus number and correctly updates local bus number
480 * based on new secondary bus number.
482 * With this configuration is PCI Bridge available at secondary bus as
483 * device number 1. But it must be available at root bus (zero) as device
484 * number 0. So in mvebu_pcie_read_config() and mvebu_pcie_write_config()
485 * functions rewrite address to the real one when accessing the root bus.
487 mvebu_pcie_set_local_bus_nr(pcie, 0);
488 mvebu_pcie_set_local_dev_nr(pcie, 1);
491 * Kirkwood arch code already maps mbus windows for PCIe IO and MEM.
492 * So skip calling mvebu_mbus_add_window_by_id() function as it would
493 * fail on error "conflicts with another window" which means conflict
494 * with existing PCIe window mappings.
496 #ifndef CONFIG_ARCH_KIRKWOOD
497 if (resource_size(&pcie->mem) &&
498 mvebu_mbus_add_window_by_id(pcie->mem_target, pcie->mem_attr,
499 (phys_addr_t)pcie->mem.start,
500 resource_size(&pcie->mem))) {
501 printf("%s: unable to add mbus window for mem at %08x+%08x\n",
503 (u32)pcie->mem.start, (unsigned)resource_size(&pcie->mem));
508 if (resource_size(&pcie->io) &&
509 mvebu_mbus_add_window_by_id(pcie->io_target, pcie->io_attr,
510 (phys_addr_t)pcie->io.start,
511 resource_size(&pcie->io))) {
512 printf("%s: unable to add mbus window for IO at %08x+%08x\n",
514 (u32)pcie->io.start, (unsigned)resource_size(&pcie->io));
520 /* Setup windows and configure host bridge */
521 mvebu_pcie_setup_wins(pcie);
523 /* PCI memory space */
524 pci_set_region(hose->regions + 0, pcie->mem.start,
525 pcie->mem.start, resource_size(&pcie->mem), PCI_REGION_MEM);
526 hose->region_count = 1;
528 if (resource_size(&pcie->mem)) {
529 pci_set_region(hose->regions + hose->region_count,
530 pcie->mem.start, pcie->mem.start,
531 resource_size(&pcie->mem),
533 hose->region_count++;
536 if (resource_size(&pcie->io)) {
537 pci_set_region(hose->regions + hose->region_count,
538 pcie->io.start, pcie->io.start,
539 resource_size(&pcie->io),
541 hose->region_count++;
544 /* PCI Bridge support 32-bit I/O and 64-bit prefetch mem addressing */
545 pcie->cfgcache[(PCI_IO_BASE - 0x10) / 4] =
546 PCI_IO_RANGE_TYPE_32 | (PCI_IO_RANGE_TYPE_32 << 8);
547 pcie->cfgcache[(PCI_PREF_MEMORY_BASE - 0x10) / 4] =
548 PCI_PREF_RANGE_TYPE_64 | (PCI_PREF_RANGE_TYPE_64 << 16);
550 mvebu_pcie_wait_for_link(pcie);
555 #define DT_FLAGS_TO_TYPE(flags) (((flags) >> 24) & 0x03)
556 #define DT_TYPE_IO 0x1
557 #define DT_TYPE_MEM32 0x2
558 #define DT_CPUADDR_TO_TARGET(cpuaddr) (((cpuaddr) >> 56) & 0xFF)
559 #define DT_CPUADDR_TO_ATTR(cpuaddr) (((cpuaddr) >> 48) & 0xFF)
561 static int mvebu_get_tgt_attr(ofnode node, int devfn,
566 const int na = 3, ns = 2;
568 int rlen, nranges, rangesz, pna, i;
573 range = ofnode_get_property(node, "ranges", &rlen);
578 * Linux uses of_n_addr_cells() to get the number of address cells
579 * here. Currently this function is only available in U-Boot when
580 * CONFIG_OF_LIVE is enabled. Until this is enabled for MVEBU in
581 * general, lets't hardcode the "pna" value in the U-Boot code.
583 pna = 2; /* hardcoded for now because of lack of of_n_addr_cells() */
584 rangesz = pna + na + ns;
585 nranges = rlen / sizeof(__be32) / rangesz;
587 for (i = 0; i < nranges; i++, range += rangesz) {
588 u32 flags = of_read_number(range, 1);
589 u32 slot = of_read_number(range + 1, 1);
590 u64 cpuaddr = of_read_number(range + na, pna);
593 if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_IO)
594 rtype = IORESOURCE_IO;
595 else if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_MEM32)
596 rtype = IORESOURCE_MEM;
601 * The Linux code used PCI_SLOT() here, which expects devfn
602 * in bits 7..0. PCI_DEV() in U-Boot is similar to PCI_SLOT(),
603 * only expects devfn in 15..8, where its saved in this driver.
605 if (slot == PCI_DEV(devfn) && type == rtype) {
606 *tgt = DT_CPUADDR_TO_TARGET(cpuaddr);
607 *attr = DT_CPUADDR_TO_ATTR(cpuaddr);
615 static int mvebu_pcie_port_parse_dt(ofnode node, ofnode parent, struct mvebu_pcie *pcie)
617 struct fdt_pci_addr pci_addr;
623 /* Get port number, lane number and memory target / attr */
624 if (ofnode_read_u32(node, "marvell,pcie-port",
630 if (ofnode_read_u32(node, "marvell,pcie-lane", &pcie->lane))
633 sprintf(pcie->name, "pcie%d.%d", pcie->port, pcie->lane);
635 if (!ofnode_read_u32(node, "num-lanes", &num_lanes) && num_lanes == 4)
638 /* devfn is in bits [15:8], see PCI_DEV usage */
639 ret = ofnode_read_pci_addr(node, FDT_PCI_SPACE_CONFIG, "reg", &pci_addr);
641 printf("%s: property \"reg\" is invalid\n", pcie->name);
644 pcie->devfn = pci_addr.phys_hi & 0xff00;
646 ret = mvebu_get_tgt_attr(parent, pcie->devfn,
648 &pcie->mem_target, &pcie->mem_attr);
650 printf("%s: cannot get tgt/attr for mem window\n", pcie->name);
654 ret = mvebu_get_tgt_attr(parent, pcie->devfn,
656 &pcie->io_target, &pcie->io_attr);
658 printf("%s: cannot get tgt/attr for IO window\n", pcie->name);
662 /* Parse PCIe controller register base from DT */
663 addr = ofnode_get_property(node, "assigned-addresses", &len);
665 printf("%s: property \"assigned-addresses\" not found\n", pcie->name);
666 ret = -FDT_ERR_NOTFOUND;
670 pcie->base = (void *)(u32)ofnode_translate_address(node, addr);
671 pcie->intregs = (u32)pcie->base - fdt32_to_cpu(addr[2]);
679 static const struct dm_pci_ops mvebu_pcie_ops = {
680 .read_config = mvebu_pcie_read_config,
681 .write_config = mvebu_pcie_write_config,
684 static struct driver pcie_mvebu_drv = {
685 .name = "pcie_mvebu",
687 .ops = &mvebu_pcie_ops,
688 .probe = mvebu_pcie_probe,
689 .plat_auto = sizeof(struct mvebu_pcie),
693 * Use a MISC device to bind the n instances (child nodes) of the
694 * PCIe base controller in UCLASS_PCI.
696 static int mvebu_pcie_bind(struct udevice *parent)
698 struct mvebu_pcie **ports_pcie;
699 struct mvebu_pcie *pcie;
700 struct uclass_driver *drv;
708 /* Lookup pci driver */
709 drv = lists_uclass_lookup(UCLASS_PCI);
711 puts("Cannot find PCI driver\n");
715 ports_count = ofnode_get_child_count(dev_ofnode(parent));
716 ports_pcie = calloc(ports_count, sizeof(*ports_pcie));
717 ports_nodes = calloc(ports_count, sizeof(*ports_nodes));
718 if (!ports_pcie || !ports_nodes) {
725 #ifdef CONFIG_ARCH_KIRKWOOD
726 mem.start = KW_DEFADR_PCI_MEM;
727 mem.end = KW_DEFADR_PCI_MEM + KW_DEFADR_PCI_MEM_SIZE - 1;
728 io.start = KW_DEFADR_PCI_IO;
729 io.end = KW_DEFADR_PCI_IO + KW_DEFADR_PCI_IO_SIZE - 1;
731 mem.start = MBUS_PCI_MEM_BASE;
732 mem.end = MBUS_PCI_MEM_BASE + MBUS_PCI_MEM_SIZE - 1;
733 io.start = MBUS_PCI_IO_BASE;
734 io.end = MBUS_PCI_IO_BASE + MBUS_PCI_IO_SIZE - 1;
737 /* First phase: Fill mvebu_pcie struct for each port */
738 ofnode_for_each_subnode(subnode, dev_ofnode(parent)) {
739 if (!ofnode_is_available(subnode))
742 pcie = calloc(1, sizeof(*pcie));
746 if (mvebu_pcie_port_parse_dt(subnode, dev_ofnode(parent), pcie) < 0) {
752 * MVEBU PCIe controller needs MEMORY and I/O BARs to be mapped
753 * into SoCs address space. Each controller will map 128M of MEM
754 * and 64K of I/O space when registered.
757 if (resource_size(&mem) >= SZ_128M) {
758 pcie->mem.start = mem.start;
759 pcie->mem.end = mem.start + SZ_128M - 1;
760 mem.start += SZ_128M;
762 printf("%s: unable to assign mbus window for mem\n", pcie->name);
767 if (resource_size(&io) >= SZ_64K) {
768 pcie->io.start = io.start;
769 pcie->io.end = io.start + SZ_64K - 1;
772 printf("%s: unable to assign mbus window for io\n", pcie->name);
777 ports_pcie[ports_count] = pcie;
778 ports_nodes[ports_count] = subnode;
782 /* Second phase: Setup all PCIe links (do not enable them yet) */
783 for (i = 0; i < ports_count; i++)
784 mvebu_pcie_setup_link(ports_pcie[i]);
786 /* Third phase: Enable all PCIe links and create for each UCLASS_PCI device */
787 for (i = 0; i < ports_count; i++) {
788 pcie = ports_pcie[i];
789 subnode = ports_nodes[i];
792 * PCIe link can be enabled only after all PCIe links were
793 * properly configured. This is because more PCIe links shares
794 * one enable bit and some PCIe links cannot be enabled
797 if (mvebu_pcie_enable_link(pcie, subnode) < 0) {
802 /* Create child device UCLASS_PCI and bind it */
803 device_bind(parent, &pcie_mvebu_drv, pcie->name, pcie, subnode,
813 static const struct udevice_id mvebu_pcie_ids[] = {
814 { .compatible = "marvell,armada-xp-pcie" },
815 { .compatible = "marvell,armada-370-pcie" },
816 { .compatible = "marvell,kirkwood-pcie" },
820 U_BOOT_DRIVER(pcie_mvebu_base) = {
821 .name = "pcie_mvebu_base",
823 .of_match = mvebu_pcie_ids,
824 .bind = mvebu_pcie_bind,