1 // SPDX-License-Identifier: GPL-2.0
3 * PCIe driver for Marvell MVEBU SoCs
5 * Based on Barebox drivers/pci/pci-mvebu.c
16 #include <dm/device-internal.h>
18 #include <dm/of_access.h>
22 #include <asm/arch/cpu.h>
23 #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/printk.h>
31 #include <linux/sizes.h>
33 /* PCIe unit register offsets */
34 #define MVPCIE_ROOT_PORT_PCI_CFG_OFF 0x0000
35 #define MVPCIE_ROOT_PORT_PCI_EXP_OFF 0x0060
36 #define MVPCIE_BAR_LO_OFF(n) (0x0010 + ((n) << 3))
37 #define MVPCIE_BAR_HI_OFF(n) (0x0014 + ((n) << 3))
38 #define MVPCIE_BAR_CTRL_OFF(n) (0x1804 + (((n) - 1) * 4))
39 #define MVPCIE_WIN04_CTRL_OFF(n) (0x1820 + ((n) << 4))
40 #define MVPCIE_WIN04_BASE_OFF(n) (0x1824 + ((n) << 4))
41 #define MVPCIE_WIN04_REMAP_OFF(n) (0x182c + ((n) << 4))
42 #define MVPCIE_WIN5_CTRL_OFF 0x1880
43 #define MVPCIE_WIN5_BASE_OFF 0x1884
44 #define MVPCIE_WIN5_REMAP_OFF 0x188c
45 #define MVPCIE_CONF_ADDR_OFF 0x18f8
46 #define MVPCIE_CONF_DATA_OFF 0x18fc
47 #define MVPCIE_CTRL_OFF 0x1a00
48 #define MVPCIE_CTRL_RC_MODE BIT(1)
49 #define MVPCIE_STAT_OFF 0x1a04
50 #define MVPCIE_STAT_BUS (0xff << 8)
51 #define MVPCIE_STAT_DEV (0x1f << 16)
52 #define MVPCIE_STAT_LINK_DOWN BIT(0)
54 #define LINK_WAIT_RETRIES 100
55 #define LINK_WAIT_TIMEOUT 1000
58 struct pci_controller hose;
60 void __iomem *membase;
64 struct gpio_desc reset_gpio;
72 unsigned int mem_target;
73 unsigned int mem_attr;
74 unsigned int io_target;
76 u32 cfgcache[(0x3c - 0x10) / 4];
79 static inline bool mvebu_pcie_link_up(struct mvebu_pcie *pcie)
82 val = readl(pcie->base + MVPCIE_STAT_OFF);
83 return !(val & MVPCIE_STAT_LINK_DOWN);
86 static void mvebu_pcie_wait_for_link(struct mvebu_pcie *pcie)
90 /* check if the link is up or not */
91 for (retries = 0; retries < LINK_WAIT_RETRIES; retries++) {
92 if (mvebu_pcie_link_up(pcie)) {
93 printf("%s: Link up\n", pcie->name);
97 udelay(LINK_WAIT_TIMEOUT);
100 printf("%s: Link down\n", pcie->name);
103 static void mvebu_pcie_set_local_bus_nr(struct mvebu_pcie *pcie, int busno)
107 stat = readl(pcie->base + MVPCIE_STAT_OFF);
108 stat &= ~MVPCIE_STAT_BUS;
110 writel(stat, pcie->base + MVPCIE_STAT_OFF);
113 static void mvebu_pcie_set_local_dev_nr(struct mvebu_pcie *pcie, int devno)
117 stat = readl(pcie->base + MVPCIE_STAT_OFF);
118 stat &= ~MVPCIE_STAT_DEV;
120 writel(stat, pcie->base + MVPCIE_STAT_OFF);
123 static inline struct mvebu_pcie *hose_to_pcie(struct pci_controller *hose)
125 return container_of(hose, struct mvebu_pcie, hose);
128 static bool mvebu_pcie_valid_addr(struct mvebu_pcie *pcie,
129 int busno, int dev, int func)
131 /* On the root bus is only one PCI Bridge */
132 if (busno == 0 && (dev != 0 || func != 0))
135 /* Access to other buses is possible when link is up */
136 if (busno != 0 && !mvebu_pcie_link_up(pcie))
139 /* On secondary bus can be only one PCIe device */
140 if (busno == pcie->sec_busno && dev != 0)
146 static int mvebu_pcie_read_config(const struct udevice *bus, pci_dev_t bdf,
147 uint offset, ulong *valuep,
148 enum pci_size_t size)
150 struct mvebu_pcie *pcie = dev_get_plat(bus);
151 int busno = PCI_BUS(bdf) - dev_seq(bus);
154 debug("PCIE CFG read: (b,d,f)=(%2d,%2d,%2d) ",
155 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
157 if (!mvebu_pcie_valid_addr(pcie, busno, PCI_DEV(bdf), PCI_FUNC(bdf))) {
158 debug("- out of range\n");
159 *valuep = pci_get_ff(size);
164 * The configuration space of the PCI Bridge on the root bus (zero) is
165 * of Type 0 but the BAR registers (including ROM BAR) don't have the
166 * same meaning as in the PCIe specification. Therefore do not access
167 * BAR registers and non-common registers (those which have different
168 * meaning for Type 0 and Type 1 config space) of the PCI Bridge and
169 * instead read their content from driver virtual cfgcache[].
171 if (busno == 0 && ((offset >= 0x10 && offset < 0x34) ||
172 (offset >= 0x38 && offset < 0x3c))) {
173 data = pcie->cfgcache[(offset - 0x10) / 4];
174 debug("(addr,size,val)=(0x%04x, %d, 0x%08x) from cfgcache\n",
176 *valuep = pci_conv_32_to_size(data, offset, size);
181 * PCI bridge is device 0 at the root bus (zero) but mvebu has it
182 * mapped on secondary bus with device number 1.
185 addr = PCI_CONF1_EXT_ADDRESS(pcie->sec_busno, 1, 0, offset);
187 addr = PCI_CONF1_EXT_ADDRESS(busno, PCI_DEV(bdf), PCI_FUNC(bdf), offset);
190 writel(addr, pcie->base + MVPCIE_CONF_ADDR_OFF);
195 data = readb(pcie->base + MVPCIE_CONF_DATA_OFF + (offset & 3));
198 data = readw(pcie->base + MVPCIE_CONF_DATA_OFF + (offset & 2));
201 data = readl(pcie->base + MVPCIE_CONF_DATA_OFF);
207 if (busno == 0 && (offset & ~3) == (PCI_HEADER_TYPE & ~3)) {
209 * Change Header Type of PCI Bridge device to Type 1
210 * (0x01, used by PCI Bridges) because mvebu reports
211 * Type 0 (0x00, used by Upstream and Endpoint devices).
213 data = pci_conv_size_to_32(data, 0, offset, size);
215 data |= PCI_HEADER_TYPE_BRIDGE << 16;
216 data = pci_conv_32_to_size(data, offset, size);
219 debug("(addr,size,val)=(0x%04x, %d, 0x%08x)\n", offset, size, data);
225 static int mvebu_pcie_write_config(struct udevice *bus, pci_dev_t bdf,
226 uint offset, ulong value,
227 enum pci_size_t size)
229 struct mvebu_pcie *pcie = dev_get_plat(bus);
230 int busno = PCI_BUS(bdf) - dev_seq(bus);
233 debug("PCIE CFG write: (b,d,f)=(%2d,%2d,%2d) ",
234 PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
235 debug("(addr,size,val)=(0x%04x, %d, 0x%08lx)\n", offset, size, value);
237 if (!mvebu_pcie_valid_addr(pcie, busno, PCI_DEV(bdf), PCI_FUNC(bdf))) {
238 debug("- out of range\n");
243 * As explained in mvebu_pcie_read_config(), PCI Bridge Type 1 specific
244 * config registers are not available, so we write their content only
245 * into driver virtual cfgcache[].
246 * And as explained in mvebu_pcie_probe(), mvebu has its own specific
247 * way for configuring secondary bus number.
249 if (busno == 0 && ((offset >= 0x10 && offset < 0x34) ||
250 (offset >= 0x38 && offset < 0x3c))) {
251 debug("Writing to cfgcache only\n");
252 data = pcie->cfgcache[(offset - 0x10) / 4];
253 data = pci_conv_size_to_32(data, value, offset, size);
254 /* mvebu PCI bridge does not have configurable bars */
255 if ((offset & ~3) == PCI_BASE_ADDRESS_0 ||
256 (offset & ~3) == PCI_BASE_ADDRESS_1 ||
257 (offset & ~3) == PCI_ROM_ADDRESS1)
259 pcie->cfgcache[(offset - 0x10) / 4] = data;
260 /* mvebu has its own way how to set PCI secondary bus number */
261 if (offset == PCI_SECONDARY_BUS ||
262 (offset == PCI_PRIMARY_BUS && size != PCI_SIZE_8)) {
263 pcie->sec_busno = (data >> 8) & 0xff;
264 mvebu_pcie_set_local_bus_nr(pcie, pcie->sec_busno);
265 debug("Secondary bus number was changed to %d\n",
272 * PCI bridge is device 0 at the root bus (zero) but mvebu has it
273 * mapped on secondary bus with device number 1.
276 addr = PCI_CONF1_EXT_ADDRESS(pcie->sec_busno, 1, 0, offset);
278 addr = PCI_CONF1_EXT_ADDRESS(busno, PCI_DEV(bdf), PCI_FUNC(bdf), offset);
281 writel(addr, pcie->base + MVPCIE_CONF_ADDR_OFF);
286 writeb(value, pcie->base + MVPCIE_CONF_DATA_OFF + (offset & 3));
289 writew(value, pcie->base + MVPCIE_CONF_DATA_OFF + (offset & 2));
292 writel(value, pcie->base + MVPCIE_CONF_DATA_OFF);
302 * Setup PCIE BARs and Address Decode Wins:
303 * BAR[0] -> internal registers
304 * BAR[1] -> covers all DRAM banks
306 * WIN[0-3] -> DRAM bank[0-3]
308 static void mvebu_pcie_setup_wins(struct mvebu_pcie *pcie)
310 const struct mbus_dram_target_info *dram = mvebu_mbus_dram_info();
314 /* First, disable and clear BARs and windows. */
315 for (i = 1; i < 3; i++) {
316 writel(0, pcie->base + MVPCIE_BAR_CTRL_OFF(i));
317 writel(0, pcie->base + MVPCIE_BAR_LO_OFF(i));
318 writel(0, pcie->base + MVPCIE_BAR_HI_OFF(i));
321 for (i = 0; i < 5; i++) {
322 writel(0, pcie->base + MVPCIE_WIN04_CTRL_OFF(i));
323 writel(0, pcie->base + MVPCIE_WIN04_BASE_OFF(i));
324 writel(0, pcie->base + MVPCIE_WIN04_REMAP_OFF(i));
327 writel(0, pcie->base + MVPCIE_WIN5_CTRL_OFF);
328 writel(0, pcie->base + MVPCIE_WIN5_BASE_OFF);
329 writel(0, pcie->base + MVPCIE_WIN5_REMAP_OFF);
331 /* Setup windows for DDR banks. Count total DDR size on the fly. */
333 for (i = 0; i < dram->num_cs; i++) {
334 const struct mbus_dram_window *cs = dram->cs + i;
336 writel(cs->base & 0xffff0000,
337 pcie->base + MVPCIE_WIN04_BASE_OFF(i));
338 writel(0, pcie->base + MVPCIE_WIN04_REMAP_OFF(i));
339 writel(((cs->size - 1) & 0xffff0000) |
340 (cs->mbus_attr << 8) |
341 (dram->mbus_dram_target_id << 4) | 1,
342 pcie->base + MVPCIE_WIN04_CTRL_OFF(i));
347 /* Round up 'size' to the nearest power of two. */
348 if ((size & (size - 1)) != 0)
349 size = 1 << fls(size);
351 /* Setup BAR[1] to all DRAM banks. */
352 writel(dram->cs[0].base | 0xc, pcie->base + MVPCIE_BAR_LO_OFF(1));
353 writel(0, pcie->base + MVPCIE_BAR_HI_OFF(1));
354 writel(((size - 1) & 0xffff0000) | 0x1,
355 pcie->base + MVPCIE_BAR_CTRL_OFF(1));
357 /* Setup BAR[0] to internal registers. */
358 writel(pcie->intregs, pcie->base + MVPCIE_BAR_LO_OFF(0));
359 writel(0, pcie->base + MVPCIE_BAR_HI_OFF(0));
362 /* Only enable PCIe link, do not setup it */
363 static int mvebu_pcie_enable_link(struct mvebu_pcie *pcie, ofnode node)
365 struct reset_ctl rst;
368 ret = reset_get_by_index_nodev(node, 0, &rst);
369 if (ret == -ENOENT) {
371 } else if (ret < 0) {
372 printf("%s: cannot get reset controller: %d\n", pcie->name, ret);
376 ret = reset_request(&rst);
378 printf("%s: cannot request reset controller: %d\n", pcie->name, ret);
382 ret = reset_deassert(&rst);
385 printf("%s: cannot enable PCIe port: %d\n", pcie->name, ret);
392 /* Setup PCIe link but do not enable it */
393 static void mvebu_pcie_setup_link(struct mvebu_pcie *pcie)
397 /* Setup PCIe controller to Root Complex mode */
398 reg = readl(pcie->base + MVPCIE_CTRL_OFF);
399 reg |= MVPCIE_CTRL_RC_MODE;
400 writel(reg, pcie->base + MVPCIE_CTRL_OFF);
403 * Set Maximum Link Width to X1 or X4 in Root Port's PCIe Link
404 * Capability register. This register is defined by PCIe specification
405 * as read-only but this mvebu controller has it as read-write and must
406 * be set to number of SerDes PCIe lanes (1 or 4). If this register is
407 * not set correctly then link with endpoint card is not established.
409 reg = readl(pcie->base + MVPCIE_ROOT_PORT_PCI_EXP_OFF + PCI_EXP_LNKCAP);
410 reg &= ~PCI_EXP_LNKCAP_MLW;
411 reg |= (pcie->is_x4 ? 4 : 1) << 4;
412 writel(reg, pcie->base + MVPCIE_ROOT_PORT_PCI_EXP_OFF + PCI_EXP_LNKCAP);
415 static int mvebu_pcie_probe(struct udevice *dev)
417 struct mvebu_pcie *pcie = dev_get_plat(dev);
418 struct udevice *ctlr = pci_get_controller(dev);
419 struct pci_controller *hose = dev_get_uclass_priv(ctlr);
423 /* Request for optional PERST# GPIO */
424 ret = gpio_request_by_name(dev, "reset-gpios", 0, &pcie->reset_gpio, GPIOD_IS_OUT);
425 if (ret && ret != -ENOENT) {
426 printf("%s: unable to request reset-gpios: %d\n", pcie->name, ret);
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. MVPCIE_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 + MVPCIE_ROOT_PORT_PCI_CFG_OFF + PCI_CLASS_REVISION);
453 reg |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
454 writel(reg, pcie->base + MVPCIE_ROOT_PORT_PCI_CFG_OFF + PCI_CLASS_REVISION);
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 /* Release PERST# via GPIO when it was defined */
551 if (dm_gpio_is_valid(&pcie->reset_gpio))
552 dm_gpio_set_value(&pcie->reset_gpio, 0);
554 mvebu_pcie_wait_for_link(pcie);
559 #define DT_FLAGS_TO_TYPE(flags) (((flags) >> 24) & 0x03)
560 #define DT_TYPE_IO 0x1
561 #define DT_TYPE_MEM32 0x2
562 #define DT_CPUADDR_TO_TARGET(cpuaddr) (((cpuaddr) >> 56) & 0xFF)
563 #define DT_CPUADDR_TO_ATTR(cpuaddr) (((cpuaddr) >> 48) & 0xFF)
565 static int mvebu_get_tgt_attr(ofnode node, int devfn,
570 const int na = 3, ns = 2;
572 int rlen, nranges, rangesz, pna, i;
577 range = ofnode_get_property(node, "ranges", &rlen);
582 * Linux uses of_n_addr_cells() to get the number of address cells
583 * here. Currently this function is only available in U-Boot when
584 * CONFIG_OF_LIVE is enabled. Until this is enabled for MVEBU in
585 * general, lets't hardcode the "pna" value in the U-Boot code.
587 pna = 2; /* hardcoded for now because of lack of of_n_addr_cells() */
588 rangesz = pna + na + ns;
589 nranges = rlen / sizeof(__be32) / rangesz;
591 for (i = 0; i < nranges; i++, range += rangesz) {
592 u32 flags = of_read_number(range, 1);
593 u32 slot = of_read_number(range + 1, 1);
594 u64 cpuaddr = of_read_number(range + na, pna);
597 if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_IO)
598 rtype = IORESOURCE_IO;
599 else if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_MEM32)
600 rtype = IORESOURCE_MEM;
605 * The Linux code used PCI_SLOT() here, which expects devfn
606 * in bits 7..0. PCI_DEV() in U-Boot is similar to PCI_SLOT(),
607 * only expects devfn in 15..8, where its saved in this driver.
609 if (slot == PCI_DEV(devfn) && type == rtype) {
610 *tgt = DT_CPUADDR_TO_TARGET(cpuaddr);
611 *attr = DT_CPUADDR_TO_ATTR(cpuaddr);
619 static int mvebu_pcie_port_parse_dt(ofnode node, ofnode parent, struct mvebu_pcie *pcie)
621 struct fdt_pci_addr pci_addr;
627 /* Get port number, lane number and memory target / attr */
628 if (ofnode_read_u32(node, "marvell,pcie-port",
634 if (ofnode_read_u32(node, "marvell,pcie-lane", &pcie->lane))
637 sprintf(pcie->name, "pcie%d.%d", pcie->port, pcie->lane);
639 if (!ofnode_read_u32(node, "num-lanes", &num_lanes) && num_lanes == 4)
642 /* devfn is in bits [15:8], see PCI_DEV usage */
643 ret = ofnode_read_pci_addr(node, FDT_PCI_SPACE_CONFIG, "reg", &pci_addr,
646 printf("%s: property \"reg\" is invalid\n", pcie->name);
649 pcie->devfn = pci_addr.phys_hi & 0xff00;
651 ret = mvebu_get_tgt_attr(parent, pcie->devfn,
653 &pcie->mem_target, &pcie->mem_attr);
655 printf("%s: cannot get tgt/attr for mem window\n", pcie->name);
659 ret = mvebu_get_tgt_attr(parent, pcie->devfn,
661 &pcie->io_target, &pcie->io_attr);
663 printf("%s: cannot get tgt/attr for IO window\n", pcie->name);
667 /* Parse PCIe controller register base from DT */
668 addr = ofnode_get_property(node, "assigned-addresses", &len);
670 printf("%s: property \"assigned-addresses\" not found\n", pcie->name);
671 ret = -FDT_ERR_NOTFOUND;
675 pcie->base = (void *)(u32)ofnode_translate_address(node, addr);
676 pcie->intregs = (u32)pcie->base - fdt32_to_cpu(addr[2]);
684 static const struct dm_pci_ops mvebu_pcie_ops = {
685 .read_config = mvebu_pcie_read_config,
686 .write_config = mvebu_pcie_write_config,
689 static struct driver pcie_mvebu_drv = {
690 .name = "pcie_mvebu",
692 .ops = &mvebu_pcie_ops,
693 .probe = mvebu_pcie_probe,
694 .plat_auto = sizeof(struct mvebu_pcie),
698 * Use a MISC device to bind the n instances (child nodes) of the
699 * PCIe base controller in UCLASS_PCI.
701 static int mvebu_pcie_bind(struct udevice *parent)
703 struct mvebu_pcie **ports_pcie;
704 struct mvebu_pcie *pcie;
705 struct uclass_driver *drv;
713 /* Lookup pci driver */
714 drv = lists_uclass_lookup(UCLASS_PCI);
716 puts("Cannot find PCI driver\n");
720 ports_count = ofnode_get_child_count(dev_ofnode(parent));
721 ports_pcie = calloc(ports_count, sizeof(*ports_pcie));
722 ports_nodes = calloc(ports_count, sizeof(*ports_nodes));
723 if (!ports_pcie || !ports_nodes) {
730 #ifdef CONFIG_ARCH_KIRKWOOD
731 mem.start = KW_DEFADR_PCI_MEM;
732 mem.end = KW_DEFADR_PCI_MEM + KW_DEFADR_PCI_MEM_SIZE - 1;
733 io.start = KW_DEFADR_PCI_IO;
734 io.end = KW_DEFADR_PCI_IO + KW_DEFADR_PCI_IO_SIZE - 1;
736 mem.start = MBUS_PCI_MEM_BASE;
737 mem.end = MBUS_PCI_MEM_BASE + MBUS_PCI_MEM_SIZE - 1;
738 io.start = MBUS_PCI_IO_BASE;
739 io.end = MBUS_PCI_IO_BASE + MBUS_PCI_IO_SIZE - 1;
742 /* First phase: Fill mvebu_pcie struct for each port */
743 ofnode_for_each_subnode(subnode, dev_ofnode(parent)) {
744 if (!ofnode_is_enabled(subnode))
747 pcie = calloc(1, sizeof(*pcie));
751 if (mvebu_pcie_port_parse_dt(subnode, dev_ofnode(parent), pcie) < 0) {
757 * MVEBU PCIe controller needs MEMORY and I/O BARs to be mapped
758 * into SoCs address space. Each controller will map 128M of MEM
759 * and 64K of I/O space when registered.
762 if (resource_size(&mem) >= SZ_128M) {
763 pcie->mem.start = mem.start;
764 pcie->mem.end = mem.start + SZ_128M - 1;
765 mem.start += SZ_128M;
767 printf("%s: unable to assign mbus window for mem\n", pcie->name);
772 if (resource_size(&io) >= SZ_64K) {
773 pcie->io.start = io.start;
774 pcie->io.end = io.start + SZ_64K - 1;
777 printf("%s: unable to assign mbus window for io\n", pcie->name);
782 ports_pcie[ports_count] = pcie;
783 ports_nodes[ports_count] = subnode;
787 /* Second phase: Setup all PCIe links (do not enable them yet) */
788 for (i = 0; i < ports_count; i++)
789 mvebu_pcie_setup_link(ports_pcie[i]);
791 /* Third phase: Enable all PCIe links and create for each UCLASS_PCI device */
792 for (i = 0; i < ports_count; i++) {
793 pcie = ports_pcie[i];
794 subnode = ports_nodes[i];
797 * PCIe link can be enabled only after all PCIe links were
798 * properly configured. This is because more PCIe links shares
799 * one enable bit and some PCIe links cannot be enabled
802 if (mvebu_pcie_enable_link(pcie, subnode) < 0) {
807 /* Create child device UCLASS_PCI and bind it */
808 device_bind(parent, &pcie_mvebu_drv, pcie->name, pcie, subnode,
818 static const struct udevice_id mvebu_pcie_ids[] = {
819 { .compatible = "marvell,armada-xp-pcie" },
820 { .compatible = "marvell,armada-370-pcie" },
821 { .compatible = "marvell,kirkwood-pcie" },
825 U_BOOT_DRIVER(pcie_mvebu_base) = {
826 .name = "pcie_mvebu_base",
828 .of_match = mvebu_pcie_ids,
829 .bind = mvebu_pcie_bind,