1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
15 #include <linux/interrupt.h>
22 #include <asm/mach-ralink/rt3883.h>
23 #include <asm/mach-ralink/ralink_regs.h>
60 	void __iomem *base;  member
77 	hose = (struct pci_controller *) bus->sysdata;  in pci_bus_to_rt3883_controller()
84 	return ioread32(rpc->base + reg);  in rt3883_pci_r32()
90 	iowrite32(val, rpc->base + reg);  in rt3883_pci_w32()
143 		generic_handle_domain_irq(rpc->irq_domain, bit);  in rt3883_pci_irq_handler()
157 	rt3883_pci_w32(rpc, t | BIT(d->hwirq), RT3883_PCI_REG_PCIENA);  in rt3883_pci_irq_unmask()
170 	rt3883_pci_w32(rpc, t & ~BIT(d->hwirq), RT3883_PCI_REG_PCIENA);  in rt3883_pci_irq_mask()
186 	irq_set_chip_data(irq, d->host_data);  in rt3883_pci_irq_map()
201 	irq = irq_of_parse_and_map(rpc->intc_of_node, 0);  in rt3883_pci_irq_init()
203 		dev_err(dev, "%pOF has no IRQ", rpc->intc_of_node);  in rt3883_pci_irq_init()
204 		return -EINVAL;  in rt3883_pci_irq_init()
210 	rpc->irq_domain =  in rt3883_pci_irq_init()
211 		irq_domain_create_linear(of_fwnode_handle(rpc->intc_of_node),  in rt3883_pci_irq_init()
215 	if (!rpc->irq_domain) {  in rt3883_pci_irq_init()
217 		return -ENODEV;  in rt3883_pci_irq_init()
234 	if (!rpc->pcie_ready && bus->number == 1)  in rt3883_pci_config_read()
237 	address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),  in rt3883_pci_config_read()
267 	if (!rpc->pcie_ready && bus->number == 1)  in rt3883_pci_config_write()
270 	address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),  in rt3883_pci_config_write()
364 	 * and de-assert the reset line  in rt3883_pci_preinit()
378 		rpc->pcie_ready = t & BIT(0);  in rt3883_pci_preinit()
380 		if (!rpc->pcie_ready) {  in rt3883_pci_preinit()
406 	struct device *dev = &pdev->dev;  in rt3883_pci_probe()
407 	struct device_node *np = dev->of_node;  in rt3883_pci_probe()
408 	struct device_node *child;  in rt3883_pci_probe()  local
415 		return -ENOMEM;  in rt3883_pci_probe()
417 	rpc->base = devm_platform_ioremap_resource(pdev, 0);  in rt3883_pci_probe()
418 	if (IS_ERR(rpc->base))  in rt3883_pci_probe()
419 		return PTR_ERR(rpc->base);  in rt3883_pci_probe()
421 	/* find the interrupt controller child node */  in rt3883_pci_probe()
422 	for_each_child_of_node(np, child) {  in rt3883_pci_probe()
423 		if (of_property_read_bool(child, "interrupt-controller")) {  in rt3883_pci_probe()
424 			rpc->intc_of_node = child;  in rt3883_pci_probe()
429 	if (!rpc->intc_of_node) {  in rt3883_pci_probe()
430 		dev_err(dev, "%pOF has no %s child node",  in rt3883_pci_probe()
431 			np, "interrupt controller");  in rt3883_pci_probe()
432 		return -EINVAL;  in rt3883_pci_probe()
435 	/* find the PCI host bridge child node */  in rt3883_pci_probe()
436 	for_each_child_of_node(np, child) {  in rt3883_pci_probe()
437 		if (of_node_is_type(child, "pci")) {  in rt3883_pci_probe()
438 			rpc->pci_controller.of_node = child;  in rt3883_pci_probe()
443 	if (!rpc->pci_controller.of_node) {  in rt3883_pci_probe()
444 		dev_err(dev, "%pOF has no %s child node",  in rt3883_pci_probe()
446 		err = -EINVAL;  in rt3883_pci_probe()
451 	for_each_available_child_of_node(rpc->pci_controller.of_node, child) {  in rt3883_pci_probe()
454 		if (!of_node_is_type(child, "pci"))  in rt3883_pci_probe()
457 		devfn = of_pci_get_devfn(child);  in rt3883_pci_probe()
475 		err = -EINVAL;  in rt3883_pci_probe()
485 	rpc->pci_controller.pci_ops = &rt3883_pci_ops;  in rt3883_pci_probe()
486 	rpc->pci_controller.io_resource = &rpc->io_res;  in rt3883_pci_probe()
487 	rpc->pci_controller.mem_resource = &rpc->mem_res;  in rt3883_pci_probe()
490 	pci_load_of_ranges(&rpc->pci_controller,  in rt3883_pci_probe()
491 			   rpc->pci_controller.of_node);  in rt3883_pci_probe()
493 	rt3883_pci_w32(rpc, rpc->mem_res.start, RT3883_PCI_REG_MEMBASE);  in rt3883_pci_probe()
494 	rt3883_pci_w32(rpc, rpc->io_res.start, RT3883_PCI_REG_IOBASE);  in rt3883_pci_probe()
496 	ioport_resource.start = rpc->io_res.start;  in rt3883_pci_probe()
497 	ioport_resource.end = rpc->io_res.end;  in rt3883_pci_probe()
542 	register_pci_controller(&rpc->pci_controller);  in rt3883_pci_probe()
547 	of_node_put(rpc->pci_controller.of_node);  in rt3883_pci_probe()
549 	of_node_put(rpc->intc_of_node);  in rt3883_pci_probe()
564 	{ .compatible = "ralink,rt3883-pci" },
571 		.name = "rt3883-pci",