1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
15 #include <linux/interrupt.h>
21 #include <asm/mach-ralink/rt3883.h>
22 #include <asm/mach-ralink/ralink_regs.h>
59 	void __iomem *base;  member
76 	hose = (struct pci_controller *) bus->sysdata;  in pci_bus_to_rt3883_controller()
83 	return ioread32(rpc->base + reg);  in rt3883_pci_r32()
89 	iowrite32(val, rpc->base + reg);  in rt3883_pci_w32()
146 		irq = irq_find_mapping(rpc->irq_domain, bit);  in rt3883_pci_irq_handler()
161 	rt3883_pci_w32(rpc, t | BIT(d->hwirq), RT3883_PCI_REG_PCIENA);  in rt3883_pci_irq_unmask()
174 	rt3883_pci_w32(rpc, t & ~BIT(d->hwirq), RT3883_PCI_REG_PCIENA);  in rt3883_pci_irq_mask()
190 	irq_set_chip_data(irq, d->host_data);  in rt3883_pci_irq_map()
205 	irq = irq_of_parse_and_map(rpc->intc_of_node, 0);  in rt3883_pci_irq_init()
207 		dev_err(dev, "%pOF has no IRQ", rpc->intc_of_node);  in rt3883_pci_irq_init()
208 		return -EINVAL;  in rt3883_pci_irq_init()
214 	rpc->irq_domain =  in rt3883_pci_irq_init()
215 		irq_domain_add_linear(rpc->intc_of_node, RT3883_PCI_IRQ_COUNT,  in rt3883_pci_irq_init()
218 	if (!rpc->irq_domain) {  in rt3883_pci_irq_init()
220 		return -ENODEV;  in rt3883_pci_irq_init()
238 	if (!rpc->pcie_ready && bus->number == 1)  in rt3883_pci_config_read()
241 	address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),  in rt3883_pci_config_read()
272 	if (!rpc->pcie_ready && bus->number == 1)  in rt3883_pci_config_write()
275 	address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),  in rt3883_pci_config_write()
369 	 * and de-assert the reset line  in rt3883_pci_preinit()
383 		rpc->pcie_ready = t & BIT(0);  in rt3883_pci_preinit()
385 		if (!rpc->pcie_ready) {  in rt3883_pci_preinit()
411 	struct device *dev = &pdev->dev;  in rt3883_pci_probe()
412 	struct device_node *np = dev->of_node;  in rt3883_pci_probe()
414 	struct device_node *child;  in rt3883_pci_probe()  local
421 		return -ENOMEM;  in rt3883_pci_probe()
424 	rpc->base = devm_ioremap_resource(dev, res);  in rt3883_pci_probe()
425 	if (IS_ERR(rpc->base))  in rt3883_pci_probe()
426 		return PTR_ERR(rpc->base);  in rt3883_pci_probe()
428 	/* find the interrupt controller child node */  in rt3883_pci_probe()
429 	for_each_child_of_node(np, child) {  in rt3883_pci_probe()
430 		if (of_get_property(child, "interrupt-controller", NULL)) {  in rt3883_pci_probe()
431 			rpc->intc_of_node = child;  in rt3883_pci_probe()
436 	if (!rpc->intc_of_node) {  in rt3883_pci_probe()
437 		dev_err(dev, "%pOF has no %s child node",  in rt3883_pci_probe()
438 			rpc->intc_of_node,  in rt3883_pci_probe()
439 			"interrupt controller");  in rt3883_pci_probe()
440 		return -EINVAL;  in rt3883_pci_probe()
443 	/* find the PCI host bridge child node */  in rt3883_pci_probe()
444 	for_each_child_of_node(np, child) {  in rt3883_pci_probe()
445 		if (of_node_is_type(child, "pci")) {  in rt3883_pci_probe()
446 			rpc->pci_controller.of_node = child;  in rt3883_pci_probe()
451 	if (!rpc->pci_controller.of_node) {  in rt3883_pci_probe()
452 		dev_err(dev, "%pOF has no %s child node",  in rt3883_pci_probe()
453 			rpc->intc_of_node,  in rt3883_pci_probe()
455 		err = -EINVAL;  in rt3883_pci_probe()
460 	for_each_available_child_of_node(rpc->pci_controller.of_node, child) {  in rt3883_pci_probe()
463 		if (!of_node_is_type(child, "pci"))  in rt3883_pci_probe()
466 		devfn = of_pci_get_devfn(child);  in rt3883_pci_probe()
484 		err = -EINVAL;  in rt3883_pci_probe()
494 	rpc->pci_controller.pci_ops = &rt3883_pci_ops;  in rt3883_pci_probe()
495 	rpc->pci_controller.io_resource = &rpc->io_res;  in rt3883_pci_probe()
496 	rpc->pci_controller.mem_resource = &rpc->mem_res;  in rt3883_pci_probe()
499 	pci_load_of_ranges(&rpc->pci_controller,  in rt3883_pci_probe()
500 			   rpc->pci_controller.of_node);  in rt3883_pci_probe()
502 	rt3883_pci_w32(rpc, rpc->mem_res.start, RT3883_PCI_REG_MEMBASE);  in rt3883_pci_probe()
503 	rt3883_pci_w32(rpc, rpc->io_res.start, RT3883_PCI_REG_IOBASE);  in rt3883_pci_probe()
505 	ioport_resource.start = rpc->io_res.start;  in rt3883_pci_probe()
506 	ioport_resource.end = rpc->io_res.end;  in rt3883_pci_probe()
551 	register_pci_controller(&rpc->pci_controller);  in rt3883_pci_probe()
556 	of_node_put(rpc->pci_controller.of_node);  in rt3883_pci_probe()
558 	of_node_put(rpc->intc_of_node);  in rt3883_pci_probe()
573 	{ .compatible = "ralink,rt3883-pci" },
580 		.name = "rt3883-pci",