^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Generic PCI host driver common code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014 ARM Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Will Deacon <will.deacon@arm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of_pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/pci-ecam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static void gen_pci_unmap_cfg(void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) pci_ecam_free((struct pci_config_window *)ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static struct pci_config_window *gen_pci_init(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct resource cfgres;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct resource_entry *bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct pci_config_window *cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) err = of_address_to_resource(dev->of_node, 0, &cfgres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) dev_err(dev, "missing \"reg\" property\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) bus = resource_list_first_type(&bridge->windows, IORESOURCE_BUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (!bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return ERR_PTR(-ENODEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) cfg = pci_ecam_create(dev, &cfgres, bus->res, ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (IS_ERR(cfg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) err = devm_add_action_or_reset(dev, gen_pci_unmap_cfg, cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int pci_host_common_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct pci_host_bridge *bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct pci_config_window *cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) const struct pci_ecam_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) ops = of_device_get_match_data(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (!ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) bridge = devm_pci_alloc_host_bridge(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (!bridge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) of_pci_check_probe_only();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* Parse and map our Configuration Space windows */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) cfg = gen_pci_init(dev, bridge, ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (IS_ERR(cfg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return PTR_ERR(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* Do not reassign resources if probe only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!pci_has_flag(PCI_PROBE_ONLY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) pci_add_flags(PCI_REASSIGN_ALL_BUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) bridge->sysdata = cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) bridge->ops = (struct pci_ops *)&ops->pci_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) platform_set_drvdata(pdev, bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return pci_host_probe(bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) EXPORT_SYMBOL_GPL(pci_host_common_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int pci_host_common_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) pci_lock_rescan_remove();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) pci_stop_root_bus(bridge->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) pci_remove_root_bus(bridge->bus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) pci_unlock_rescan_remove();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) EXPORT_SYMBOL_GPL(pci_host_common_remove);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags
| Donate