1 // SPDX-License-Identifier: GPL-2.0
3  * Loongson PCI Host Controller Driver
10 #include <linux/pci.h>
12 #include <linux/pci-acpi.h>
13 #include <linux/pci-ecam.h>
15 #include "../pci.h"
53 	dev->class = PCI_CLASS_BRIDGE_PCI_NORMAL;  in bridge_class_quirk()
68 	pdev->mmio_always_on = 1;  in system_bus_quirk()
69 	pdev->non_compliant_bars = 1;  in system_bus_quirk()
80 	struct pci_bus *bus = dev->bus;  in loongson_mrrs_quirk()
91 		bridge = bus->self;  in loongson_mrrs_quirk()
92 		bus = bus->parent;  in loongson_mrrs_quirk()
112 	pdev->pin = 1 + (PCI_FUNC(pdev->devfn) & 3);  in loongson_pci_pin_quirk()
134 		return (struct loongson_pci *)(bus->sysdata);  in pci_bus_to_loongson_pci()
136 	cfg = bus->sysdata;  in pci_bus_to_loongson_pci()
137 	return (struct loongson_pci *)(cfg->priv);  in pci_bus_to_loongson_pci()
144 	unsigned char busnum = bus->number;  in cfg0_map()
151 	return priv->cfg0_base + addroff;  in cfg0_map()
158 	unsigned char busnum = bus->number;  in cfg1_map()
165 	return priv->cfg1_base + addroff;  in cfg1_map()
186 	if ((priv->data->flags & FLAG_DEV_FIX) && bus->self) {  in pci_loongson_map_bus()
191 	/* Don't access non-existent devices */  in pci_loongson_map_bus()
192 	if (priv->data->flags & FLAG_DEV_HIDDEN) {  in pci_loongson_map_bus()
198 	if (where < PCI_CFG_SPACE_SIZE && priv->cfg0_base)  in pci_loongson_map_bus()
202 	if (where < PCI_CFG_SPACE_EXP_SIZE && priv->cfg1_base)  in pci_loongson_map_bus()
228 /* LS2K/LS7A accept 8/16/32-bit PCI config operations */
235 /* RS780/SR5690 only accept 32-bit PCI config operations */
258 	{ .compatible = "loongson,ls2k-pci",
260 	{ .compatible = "loongson,ls7a-pci",
262 	{ .compatible = "loongson,rs780e-pci",
270 	struct device *dev = &pdev->dev;  in loongson_pci_probe()
271 	struct device_node *node = dev->of_node;  in loongson_pci_probe()
276 		return -ENODEV;  in loongson_pci_probe()
280 		return -ENODEV;  in loongson_pci_probe()
283 	priv->pdev = pdev;  in loongson_pci_probe()
284 	priv->data = of_device_get_match_data(dev);  in loongson_pci_probe()
286 	if (priv->data->flags & FLAG_CFG0) {  in loongson_pci_probe()
291 			priv->cfg0_base = devm_pci_remap_cfg_resource(dev, regs);  in loongson_pci_probe()
292 			if (IS_ERR(priv->cfg0_base))  in loongson_pci_probe()
293 				return PTR_ERR(priv->cfg0_base);  in loongson_pci_probe()
297 	if (priv->data->flags & FLAG_CFG1) {  in loongson_pci_probe()
302 			priv->cfg1_base = devm_pci_remap_cfg_resource(dev, regs);  in loongson_pci_probe()
303 			if (IS_ERR(priv->cfg1_base))  in loongson_pci_probe()
304 				priv->cfg1_base = NULL;  in loongson_pci_probe()
308 	bridge->sysdata = priv;  in loongson_pci_probe()
309 	bridge->ops = priv->data->ops;  in loongson_pci_probe()
310 	bridge->map_irq = loongson_map_irq;  in loongson_pci_probe()
317 		.name = "loongson-pci",
330 	struct device *dev = cfg->parent;  in loongson_pci_ecam_init()
336 		return -ENOMEM;  in loongson_pci_ecam_init()
340 		return -ENOMEM;  in loongson_pci_ecam_init()
342 	cfg->priv = priv;  in loongson_pci_ecam_init()
343 	data->flags = FLAG_CFG1 | FLAG_DEV_HIDDEN;  in loongson_pci_ecam_init()
344 	priv->data = data;  in loongson_pci_ecam_init()
345 	priv->cfg1_base = cfg->win - (cfg->busr.start << 16);  in loongson_pci_ecam_init()