static int versatile_pci_parse_request_of_pci_ranges(struct device *dev, struct list_head *res) { int err, mem = 1, res_valid = 0; struct device_node *np = dev->of_node; resource_size_t iobase; struct resource_entry *win, *tmp; err = of_pci_get_host_bridge_resources(np, 0, 0xff, res, &iobase); if (err) return err; err = devm_request_pci_bus_resources(dev, res); if (err) goto out_release_res; resource_list_for_each_entry_safe(win, tmp, res) { struct resource *res = win->res; switch (resource_type(res)) { case IORESOURCE_IO: err = pci_remap_iospace(res, iobase); if (err) { dev_warn(dev, "error %d: failed to map resource %pR\n", err, res); resource_list_destroy_entry(win); } break; case IORESOURCE_MEM: res_valid |= !(res->flags & IORESOURCE_PREFETCH); writel(res->start >> 28, PCI_IMAP(mem)); writel(PHYS_OFFSET >> 28, PCI_SMAP(mem)); mem++; break; } } if (res_valid) return 0; dev_err(dev, "non-prefetchable memory resource required\n"); err = -EINVAL; out_release_res: pci_free_resource_list(res); return err; }
static int gen_pci_parse_request_of_pci_ranges(struct device *dev, struct list_head *resources, struct resource **bus_range) { int err, res_valid = 0; struct device_node *np = dev->of_node; resource_size_t iobase; struct resource_entry *win, *tmp; err = of_pci_get_host_bridge_resources(np, 0, 0xff, resources, &iobase); if (err) return err; err = devm_request_pci_bus_resources(dev, resources); if (err) return err; resource_list_for_each_entry_safe(win, tmp, resources) { struct resource *res = win->res; switch (resource_type(res)) { case IORESOURCE_IO: err = pci_remap_iospace(res, iobase); if (err) { dev_warn(dev, "error %d: failed to map resource %pR\n", err, res); resource_list_destroy_entry(win); } break; case IORESOURCE_MEM: res_valid |= !(res->flags & IORESOURCE_PREFETCH); break; case IORESOURCE_BUS: *bus_range = res; break; } } if (res_valid) return 0; dev_err(dev, "non-prefetchable memory resource required\n"); return -EINVAL; }
int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) { struct device *dev; int ret; void *sysdata; struct pci_bus *bus; dev = pcie->dev; ret = devm_request_pci_bus_resources(dev, res); if (ret) return ret; ret = phy_init(pcie->phy); if (ret) { dev_err(dev, "unable to initialize PCIe PHY\n"); return ret; } ret = phy_power_on(pcie->phy); if (ret) { dev_err(dev, "unable to power on PCIe PHY\n"); goto err_exit_phy; } switch (pcie->type) { case IPROC_PCIE_PAXB: pcie->reg_offsets = iproc_pcie_reg_paxb; break; case IPROC_PCIE_PAXC: pcie->reg_offsets = iproc_pcie_reg_paxc; break; default: dev_err(dev, "incompatible iProc PCIe interface\n"); ret = -EINVAL; goto err_power_off_phy; } iproc_pcie_reset(pcie); if (pcie->need_ob_cfg) { ret = iproc_pcie_map_ranges(pcie, res); if (ret) { dev_err(dev, "map failed\n"); goto err_power_off_phy; } } #ifdef CONFIG_ARM pcie->sysdata.private_data = pcie; sysdata = &pcie->sysdata; #else sysdata = pcie; #endif bus = pci_create_root_bus(dev, 0, &iproc_pcie_ops, sysdata, res); if (!bus) { dev_err(dev, "unable to create PCI root bus\n"); ret = -ENOMEM; goto err_power_off_phy; } pcie->root_bus = bus; ret = iproc_pcie_check_link(pcie, bus); if (ret) { dev_err(dev, "no PCIe EP device detected\n"); goto err_rm_root_bus; } iproc_pcie_enable(pcie); if (IS_ENABLED(CONFIG_PCI_MSI)) if (iproc_pcie_msi_enable(pcie)) dev_info(dev, "not using iProc MSI\n"); pci_scan_child_bus(bus); pci_assign_unassigned_bus_resources(bus); pci_fixup_irqs(pci_common_swizzle, pcie->map_irq); pci_bus_add_devices(bus); return 0; err_rm_root_bus: pci_stop_root_bus(bus); pci_remove_root_bus(bus); err_power_off_phy: phy_power_off(pcie->phy); err_exit_phy: phy_exit(pcie->phy); return ret; }