pci/controller/pcie-mediatek.c

168  * @pcie: pointer to PCIe host info
190 	struct mtk_pcie *pcie;
228 static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
230 	struct device *dev = pcie->dev;
232 	clk_disable_unprepare(pcie->free_ck);
240 	struct mtk_pcie *pcie = port->pcie;
241 	struct device *dev = pcie->dev;
248 static void mtk_pcie_put_resources(struct mtk_pcie *pcie)
252 	list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
264 	mtk_pcie_subsys_powerdown(pcie);
342 	struct mtk_pcie *pcie = bus->sysdata;
356 	list_for_each_entry(port, &pcie->ports, list)
406 	dev_dbg(port->pcie->dev, "msi#%d address_hi %#x address_lo %#x\n",
466 		dev_err(port->pcie->dev, "trying to free unused MSI#%lu\n",
496 	struct fwnode_handle *fwnode = of_node_to_fwnode(port->pcie->dev->of_node);
503 		dev_err(port->pcie->dev, "failed to create IRQ domain\n");
510 		dev_err(port->pcie->dev, "failed to create MSI domain\n");
532 static void mtk_pcie_irq_teardown(struct mtk_pcie *pcie)
536 	list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
569 	struct device *dev = port->pcie->dev;
641 	struct mtk_pcie *pcie = port->pcie;
642 	struct device *dev = pcie->dev;
668 	struct mtk_pcie *pcie = port->pcie;
669 	struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
672 	const struct mtk_pcie_soc *soc = port->pcie->soc;
683 	if (pcie->base) {
684 		val = readl(pcie->base + PCIE_SYS_CFG_V2);
687 		writel(val, pcie->base + PCIE_SYS_CFG_V2);
688 	} else if (pcie->cfg) {
691 		regmap_update_bits(pcie->cfg, PCIE_SYS_CFG_V2, val, val);
762 	struct mtk_pcie *pcie = bus->sysdata;
765 			      bus->number), pcie->base + PCIE_CFG_ADDR);
767 	return pcie->base + PCIE_CFG_DATA + (where & 3);
778 	struct mtk_pcie *pcie = port->pcie;
785 	val = readl(pcie->base + PCIE_SYS_CFG);
787 	writel(val, pcie->base + PCIE_SYS_CFG);
790 	val = readl(pcie->base + PCIE_SYS_CFG);
792 	writel(val, pcie->base + PCIE_SYS_CFG);
802 	val = readl(pcie->base + PCIE_INT_ENABLE);
804 	writel(val, pcie->base + PCIE_INT_ENABLE);
815 	       pcie->base + PCIE_CFG_ADDR);
816 	val = readl(pcie->base + PCIE_CFG_DATA);
820 	       pcie->base + PCIE_CFG_ADDR);
821 	writel(val, pcie->base + PCIE_CFG_DATA);
825 	       pcie->base + PCIE_CFG_ADDR);
826 	val = readl(pcie->base + PCIE_CFG_DATA);
830 	       pcie->base + PCIE_CFG_ADDR);
831 	writel(val, pcie->base + PCIE_CFG_DATA);
838 	struct mtk_pcie *pcie = port->pcie;
839 	struct device *dev = pcie->dev;
893 	if (!pcie->soc->startup(port))
917 static int mtk_pcie_parse_port(struct mtk_pcie *pcie,
922 	struct device *dev = pcie->dev;
971 	snprintf(name, sizeof(name), "pcie-rst%d", slot);
977 	snprintf(name, sizeof(name), "pcie-phy%d", slot);
983 	port->pcie = pcie;
985 	if (pcie->soc->setup_irq) {
986 		err = pcie->soc->setup_irq(port, node);
992 	list_add_tail(&port->list, &pcie->ports);
997 static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
999 	struct device *dev = pcie->dev;
1008 		pcie->base = devm_ioremap_resource(dev, regs);
1009 		if (IS_ERR(pcie->base))
1010 			return PTR_ERR(pcie->base);
1016 		pcie->cfg = syscon_node_to_regmap(cfg_node);
1018 		if (IS_ERR(pcie->cfg))
1019 			return PTR_ERR(pcie->cfg);
1022 	pcie->free_ck = devm_clk_get(dev, "free_ck");
1023 	if (IS_ERR(pcie->free_ck)) {
1024 		if (PTR_ERR(pcie->free_ck) == -EPROBE_DEFER)
1027 		pcie->free_ck = NULL;
1034 	err = clk_prepare_enable(pcie->free_ck);
1049 static int mtk_pcie_setup(struct mtk_pcie *pcie)
1051 	struct device *dev = pcie->dev;
1067 			err = mtk_pcie_parse_port(pcie, child, slot);
1072 		err = mtk_pcie_parse_port(pcie, node, slot);
1077 	err = mtk_pcie_subsys_powerup(pcie);
1082 	list_for_each_entry_safe(port, tmp, &pcie->ports, list)
1086 	if (list_empty(&pcie->ports))
1087 		mtk_pcie_subsys_powerdown(pcie);
1098 	struct mtk_pcie *pcie;
1102 	host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
1106 	pcie = pci_host_bridge_priv(host);
1108 	pcie->dev = dev;
1109 	pcie->soc = of_device_get_match_data(dev);
1110 	platform_set_drvdata(pdev, pcie);
1111 	INIT_LIST_HEAD(&pcie->ports);
1113 	err = mtk_pcie_setup(pcie);
1117 	host->ops = pcie->soc->ops;
1118 	host->sysdata = pcie;
1119 	host->msi_domain = pcie->soc->no_msi;
1128 	if (!list_empty(&pcie->ports))
1129 		mtk_pcie_put_resources(pcie);
1135 static void mtk_pcie_free_resources(struct mtk_pcie *pcie)
1137 	struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
1145 	struct mtk_pcie *pcie = platform_get_drvdata(pdev);
1146 	struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie);
1150 	mtk_pcie_free_resources(pcie);
1152 	mtk_pcie_irq_teardown(pcie);
1154 	mtk_pcie_put_resources(pcie);
1159 	struct mtk_pcie *pcie = dev_get_drvdata(dev);
1162 	if (list_empty(&pcie->ports))
1165 	list_for_each_entry(port, &pcie->ports, list) {
1176 	clk_disable_unprepare(pcie->free_ck);
1183 	struct mtk_pcie *pcie = dev_get_drvdata(dev);
1186 	if (list_empty(&pcie->ports))
1189 	clk_prepare_enable(pcie->free_ck);
1191 	list_for_each_entry_safe(port, tmp, &pcie->ports, list)
1195 	if (list_empty(&pcie->ports))
1196 		clk_disable_unprepare(pcie->free_ck);
1235 	{ .compatible = "mediatek,mt2701-pcie", .data = &mtk_pcie_soc_v1 },
1236 	{ .compatible = "mediatek,mt7623-pcie", .data = &mtk_pcie_soc_v1 },
1237 	{ .compatible = "mediatek,mt2712-pcie", .data = &mtk_pcie_soc_mt2712 },
1238 	{ .compatible = "mediatek,mt7622-pcie", .data = &mtk_pcie_soc_mt7622 },
1239 	{ .compatible = "mediatek,mt7629-pcie", .data = &mtk_pcie_soc_mt7629 },
1248 		.name = "mtk-pcie",