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()
145 		generic_handle_domain_irq(rpc->irq_domain, bit);  in rt3883_pci_irq_handler()
159 	rt3883_pci_w32(rpc, t | BIT(d->hwirq), RT3883_PCI_REG_PCIENA);  in rt3883_pci_irq_unmask()
172 	rt3883_pci_w32(rpc, t & ~BIT(d->hwirq), RT3883_PCI_REG_PCIENA);  in rt3883_pci_irq_mask()
188 	irq_set_chip_data(irq, d->host_data);  in rt3883_pci_irq_map()
203 	irq = irq_of_parse_and_map(rpc->intc_of_node, 0);  in rt3883_pci_irq_init()
205 		dev_err(dev, "%pOF has no IRQ", rpc->intc_of_node);  in rt3883_pci_irq_init()
206 		return -EINVAL;  in rt3883_pci_irq_init()
212 	rpc->irq_domain =  in rt3883_pci_irq_init()
213 		irq_domain_add_linear(rpc->intc_of_node, RT3883_PCI_IRQ_COUNT,  in rt3883_pci_irq_init()
216 	if (!rpc->irq_domain) {  in rt3883_pci_irq_init()
218 		return -ENODEV;  in rt3883_pci_irq_init()
235 	if (!rpc->pcie_ready && bus->number == 1)  in rt3883_pci_config_read()
238 	address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),  in rt3883_pci_config_read()
268 	if (!rpc->pcie_ready && bus->number == 1)  in rt3883_pci_config_write()
271 	address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),  in rt3883_pci_config_write()
365 	 * and de-assert the reset line  in rt3883_pci_preinit()
379 		rpc->pcie_ready = t & BIT(0);  in rt3883_pci_preinit()
381 		if (!rpc->pcie_ready) {  in rt3883_pci_preinit()
407 	struct device *dev = &pdev->dev;  in rt3883_pci_probe()
408 	struct device_node *np = dev->of_node;  in rt3883_pci_probe()
410 	struct device_node *child;  in rt3883_pci_probe()  local
417 		return -ENOMEM;  in rt3883_pci_probe()
420 	rpc->base = devm_ioremap_resource(dev, res);  in rt3883_pci_probe()
421 	if (IS_ERR(rpc->base))  in rt3883_pci_probe()
422 		return PTR_ERR(rpc->base);  in rt3883_pci_probe()
424 	/* find the interrupt controller child node */  in rt3883_pci_probe()
425 	for_each_child_of_node(np, child) {  in rt3883_pci_probe()
426 		if (of_get_property(child, "interrupt-controller", NULL)) {  in rt3883_pci_probe()
427 			rpc->intc_of_node = child;  in rt3883_pci_probe()
432 	if (!rpc->intc_of_node) {  in rt3883_pci_probe()
433 		dev_err(dev, "%pOF has no %s child node",  in rt3883_pci_probe()
434 			np, "interrupt controller");  in rt3883_pci_probe()
435 		return -EINVAL;  in rt3883_pci_probe()
438 	/* find the PCI host bridge child node */  in rt3883_pci_probe()
439 	for_each_child_of_node(np, child) {  in rt3883_pci_probe()
440 		if (of_node_is_type(child, "pci")) {  in rt3883_pci_probe()
441 			rpc->pci_controller.of_node = child;  in rt3883_pci_probe()
446 	if (!rpc->pci_controller.of_node) {  in rt3883_pci_probe()
447 		dev_err(dev, "%pOF has no %s child node",  in rt3883_pci_probe()
449 		err = -EINVAL;  in rt3883_pci_probe()
454 	for_each_available_child_of_node(rpc->pci_controller.of_node, child) {  in rt3883_pci_probe()
457 		if (!of_node_is_type(child, "pci"))  in rt3883_pci_probe()
460 		devfn = of_pci_get_devfn(child);  in rt3883_pci_probe()
478 		err = -EINVAL;  in rt3883_pci_probe()
488 	rpc->pci_controller.pci_ops = &rt3883_pci_ops;  in rt3883_pci_probe()
489 	rpc->pci_controller.io_resource = &rpc->io_res;  in rt3883_pci_probe()
490 	rpc->pci_controller.mem_resource = &rpc->mem_res;  in rt3883_pci_probe()
493 	pci_load_of_ranges(&rpc->pci_controller,  in rt3883_pci_probe()
494 			   rpc->pci_controller.of_node);  in rt3883_pci_probe()
496 	rt3883_pci_w32(rpc, rpc->mem_res.start, RT3883_PCI_REG_MEMBASE);  in rt3883_pci_probe()
497 	rt3883_pci_w32(rpc, rpc->io_res.start, RT3883_PCI_REG_IOBASE);  in rt3883_pci_probe()
499 	ioport_resource.start = rpc->io_res.start;  in rt3883_pci_probe()
500 	ioport_resource.end = rpc->io_res.end;  in rt3883_pci_probe()
545 	register_pci_controller(&rpc->pci_controller);  in rt3883_pci_probe()
550 	of_node_put(rpc->pci_controller.of_node);  in rt3883_pci_probe()
552 	of_node_put(rpc->intc_of_node);  in rt3883_pci_probe()
567 	{ .compatible = "ralink,rt3883-pci" },
574 		.name = "rt3883-pci",