1*b886d83cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2b71bb863SJohannes Thumshirn /* 3b71bb863SJohannes Thumshirn * MEN Chameleon Bus. 4b71bb863SJohannes Thumshirn * 5b71bb863SJohannes Thumshirn * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) 6b71bb863SJohannes Thumshirn * Author: Johannes Thumshirn <johannes.thumshirn@men.de> 7b71bb863SJohannes Thumshirn */ 8b71bb863SJohannes Thumshirn 9b71bb863SJohannes Thumshirn #include <linux/module.h> 10b71bb863SJohannes Thumshirn #include <linux/pci.h> 11b71bb863SJohannes Thumshirn #include <linux/mcb.h> 12b71bb863SJohannes Thumshirn 13b71bb863SJohannes Thumshirn #include "mcb-internal.h" 14b71bb863SJohannes Thumshirn 15b71bb863SJohannes Thumshirn struct priv { 16b71bb863SJohannes Thumshirn struct mcb_bus *bus; 177b7c5491SJohannes Thumshirn phys_addr_t mapbase; 18b71bb863SJohannes Thumshirn void __iomem *base; 19b71bb863SJohannes Thumshirn }; 20b71bb863SJohannes Thumshirn 214ec65b77SJohannes Thumshirn static int mcb_pci_get_irq(struct mcb_device *mdev) 224ec65b77SJohannes Thumshirn { 234ec65b77SJohannes Thumshirn struct mcb_bus *mbus = mdev->bus; 244ec65b77SJohannes Thumshirn struct device *dev = mbus->carrier; 254ec65b77SJohannes Thumshirn struct pci_dev *pdev = to_pci_dev(dev); 264ec65b77SJohannes Thumshirn 274ec65b77SJohannes Thumshirn return pdev->irq; 284ec65b77SJohannes Thumshirn } 294ec65b77SJohannes Thumshirn 30b71bb863SJohannes Thumshirn static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 31b71bb863SJohannes Thumshirn { 327b7c5491SJohannes Thumshirn struct resource *res; 33b71bb863SJohannes Thumshirn struct priv *priv; 34b71bb863SJohannes Thumshirn int ret; 35b71bb863SJohannes Thumshirn unsigned long flags; 36b71bb863SJohannes Thumshirn 37b71bb863SJohannes Thumshirn priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL); 38b71bb863SJohannes Thumshirn if (!priv) 39b71bb863SJohannes Thumshirn return -ENOMEM; 40b71bb863SJohannes Thumshirn 41b71bb863SJohannes Thumshirn ret = pci_enable_device(pdev); 42b71bb863SJohannes Thumshirn if (ret) { 43b71bb863SJohannes Thumshirn dev_err(&pdev->dev, "Failed to enable PCI device\n"); 44b71bb863SJohannes Thumshirn return -ENODEV; 45b71bb863SJohannes Thumshirn } 4615bb81d3SMichael Moese pci_set_master(pdev); 47b71bb863SJohannes Thumshirn 487b7c5491SJohannes Thumshirn priv->mapbase = pci_resource_start(pdev, 0); 497b7c5491SJohannes Thumshirn if (!priv->mapbase) { 50b71bb863SJohannes Thumshirn dev_err(&pdev->dev, "No PCI resource\n"); 51bf25c199SAlexey Khoroshilov ret = -ENODEV; 52a48742bcSJohannes Thumshirn goto out_disable; 53b71bb863SJohannes Thumshirn } 54b71bb863SJohannes Thumshirn 55d19366f1SAndreas Werner res = devm_request_mem_region(&pdev->dev, priv->mapbase, 56d19366f1SAndreas Werner CHAM_HEADER_SIZE, 577b7c5491SJohannes Thumshirn KBUILD_MODNAME); 58d86fb45bSDan Carpenter if (!res) { 597b7c5491SJohannes Thumshirn dev_err(&pdev->dev, "Failed to request PCI memory\n"); 60d86fb45bSDan Carpenter ret = -EBUSY; 61a48742bcSJohannes Thumshirn goto out_disable; 62b71bb863SJohannes Thumshirn } 63b71bb863SJohannes Thumshirn 64d19366f1SAndreas Werner priv->base = devm_ioremap(&pdev->dev, priv->mapbase, CHAM_HEADER_SIZE); 65b71bb863SJohannes Thumshirn if (!priv->base) { 66b71bb863SJohannes Thumshirn dev_err(&pdev->dev, "Cannot ioremap\n"); 67b71bb863SJohannes Thumshirn ret = -ENOMEM; 68d19366f1SAndreas Werner goto out_disable; 69b71bb863SJohannes Thumshirn } 70b71bb863SJohannes Thumshirn 71b71bb863SJohannes Thumshirn flags = pci_resource_flags(pdev, 0); 72b71bb863SJohannes Thumshirn if (flags & IORESOURCE_IO) { 73b71bb863SJohannes Thumshirn ret = -ENOTSUPP; 74b71bb863SJohannes Thumshirn dev_err(&pdev->dev, 75b71bb863SJohannes Thumshirn "IO mapped PCI devices are not supported\n"); 76d19366f1SAndreas Werner goto out_disable; 77b71bb863SJohannes Thumshirn } 78b71bb863SJohannes Thumshirn 79b71bb863SJohannes Thumshirn pci_set_drvdata(pdev, priv); 80b71bb863SJohannes Thumshirn 814ec65b77SJohannes Thumshirn priv->bus = mcb_alloc_bus(&pdev->dev); 824ec65b77SJohannes Thumshirn if (IS_ERR(priv->bus)) { 834ec65b77SJohannes Thumshirn ret = PTR_ERR(priv->bus); 84d19366f1SAndreas Werner goto out_disable; 854ec65b77SJohannes Thumshirn } 864ec65b77SJohannes Thumshirn 874ec65b77SJohannes Thumshirn priv->bus->get_irq = mcb_pci_get_irq; 88b71bb863SJohannes Thumshirn 897b7c5491SJohannes Thumshirn ret = chameleon_parse_cells(priv->bus, priv->mapbase, priv->base); 90b71bb863SJohannes Thumshirn if (ret < 0) 9141ada9dfSAlexey Khoroshilov goto out_mcb_bus; 92b71bb863SJohannes Thumshirn 938cd1f9d0SAndreas Werner dev_dbg(&pdev->dev, "Found %d cells\n", ret); 94b71bb863SJohannes Thumshirn 95b71bb863SJohannes Thumshirn mcb_bus_add_devices(priv->bus); 96b71bb863SJohannes Thumshirn 977b7c5491SJohannes Thumshirn return 0; 987b7c5491SJohannes Thumshirn 9941ada9dfSAlexey Khoroshilov out_mcb_bus: 10041ada9dfSAlexey Khoroshilov mcb_release_bus(priv->bus); 101a48742bcSJohannes Thumshirn out_disable: 102b71bb863SJohannes Thumshirn pci_disable_device(pdev); 103b71bb863SJohannes Thumshirn return ret; 104b71bb863SJohannes Thumshirn } 105b71bb863SJohannes Thumshirn 106b71bb863SJohannes Thumshirn static void mcb_pci_remove(struct pci_dev *pdev) 107b71bb863SJohannes Thumshirn { 108b71bb863SJohannes Thumshirn struct priv *priv = pci_get_drvdata(pdev); 109b71bb863SJohannes Thumshirn 110b71bb863SJohannes Thumshirn mcb_release_bus(priv->bus); 1117b7c5491SJohannes Thumshirn 1127b7c5491SJohannes Thumshirn pci_disable_device(pdev); 113b71bb863SJohannes Thumshirn } 114b71bb863SJohannes Thumshirn 115b71bb863SJohannes Thumshirn static const struct pci_device_id mcb_pci_tbl[] = { 116b71bb863SJohannes Thumshirn { PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) }, 11729ea6be3SJohannes Thumshirn { PCI_DEVICE(PCI_VENDOR_ID_ALTERA, PCI_DEVICE_ID_MEN_CHAMELEON) }, 118b71bb863SJohannes Thumshirn { 0 }, 119b71bb863SJohannes Thumshirn }; 120b71bb863SJohannes Thumshirn MODULE_DEVICE_TABLE(pci, mcb_pci_tbl); 121b71bb863SJohannes Thumshirn 122b71bb863SJohannes Thumshirn static struct pci_driver mcb_pci_driver = { 123b71bb863SJohannes Thumshirn .name = "mcb-pci", 124b71bb863SJohannes Thumshirn .id_table = mcb_pci_tbl, 125b71bb863SJohannes Thumshirn .probe = mcb_pci_probe, 126b71bb863SJohannes Thumshirn .remove = mcb_pci_remove, 127b71bb863SJohannes Thumshirn }; 128b71bb863SJohannes Thumshirn 129b71bb863SJohannes Thumshirn module_pci_driver(mcb_pci_driver); 130b71bb863SJohannes Thumshirn 131b71bb863SJohannes Thumshirn MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>"); 132b71bb863SJohannes Thumshirn MODULE_LICENSE("GPL"); 133b71bb863SJohannes Thumshirn MODULE_DESCRIPTION("MCB over PCI support"); 134