1b71bb863SJohannes Thumshirn /* 2b71bb863SJohannes Thumshirn * MEN Chameleon Bus. 3b71bb863SJohannes Thumshirn * 4b71bb863SJohannes Thumshirn * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) 5b71bb863SJohannes Thumshirn * Author: Johannes Thumshirn <johannes.thumshirn@men.de> 6b71bb863SJohannes Thumshirn * 7b71bb863SJohannes Thumshirn * This program is free software; you can redistribute it and/or modify it 8b71bb863SJohannes Thumshirn * under the terms of the GNU General Public License as published by the Free 9b71bb863SJohannes Thumshirn * Software Foundation; version 2 of the License. 10b71bb863SJohannes Thumshirn */ 11b71bb863SJohannes Thumshirn 12b71bb863SJohannes Thumshirn #include <linux/module.h> 13b71bb863SJohannes Thumshirn #include <linux/pci.h> 14b71bb863SJohannes Thumshirn #include <linux/mcb.h> 15b71bb863SJohannes Thumshirn 16b71bb863SJohannes Thumshirn #include "mcb-internal.h" 17b71bb863SJohannes Thumshirn 18b71bb863SJohannes Thumshirn struct priv { 19b71bb863SJohannes Thumshirn struct mcb_bus *bus; 207b7c5491SJohannes Thumshirn phys_addr_t mapbase; 21b71bb863SJohannes Thumshirn void __iomem *base; 22b71bb863SJohannes Thumshirn }; 23b71bb863SJohannes Thumshirn 244ec65b77SJohannes Thumshirn static int mcb_pci_get_irq(struct mcb_device *mdev) 254ec65b77SJohannes Thumshirn { 264ec65b77SJohannes Thumshirn struct mcb_bus *mbus = mdev->bus; 274ec65b77SJohannes Thumshirn struct device *dev = mbus->carrier; 284ec65b77SJohannes Thumshirn struct pci_dev *pdev = to_pci_dev(dev); 294ec65b77SJohannes Thumshirn 304ec65b77SJohannes Thumshirn return pdev->irq; 314ec65b77SJohannes Thumshirn } 324ec65b77SJohannes Thumshirn 33b71bb863SJohannes Thumshirn static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 34b71bb863SJohannes Thumshirn { 357b7c5491SJohannes Thumshirn struct resource *res; 36b71bb863SJohannes Thumshirn struct priv *priv; 37b71bb863SJohannes Thumshirn int ret; 38b71bb863SJohannes Thumshirn unsigned long flags; 39b71bb863SJohannes Thumshirn 40b71bb863SJohannes Thumshirn priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL); 41b71bb863SJohannes Thumshirn if (!priv) 42b71bb863SJohannes Thumshirn return -ENOMEM; 43b71bb863SJohannes Thumshirn 44b71bb863SJohannes Thumshirn ret = pci_enable_device(pdev); 45b71bb863SJohannes Thumshirn if (ret) { 46b71bb863SJohannes Thumshirn dev_err(&pdev->dev, "Failed to enable PCI device\n"); 47b71bb863SJohannes Thumshirn return -ENODEV; 48b71bb863SJohannes Thumshirn } 4915bb81d3SMichael Moese pci_set_master(pdev); 50b71bb863SJohannes Thumshirn 517b7c5491SJohannes Thumshirn priv->mapbase = pci_resource_start(pdev, 0); 527b7c5491SJohannes Thumshirn if (!priv->mapbase) { 53b71bb863SJohannes Thumshirn dev_err(&pdev->dev, "No PCI resource\n"); 54bf25c199SAlexey Khoroshilov ret = -ENODEV; 55a48742bcSJohannes Thumshirn goto out_disable; 56b71bb863SJohannes Thumshirn } 57b71bb863SJohannes Thumshirn 58d19366f1SAndreas Werner res = devm_request_mem_region(&pdev->dev, priv->mapbase, 59d19366f1SAndreas Werner CHAM_HEADER_SIZE, 607b7c5491SJohannes Thumshirn KBUILD_MODNAME); 61d86fb45bSDan Carpenter if (!res) { 627b7c5491SJohannes Thumshirn dev_err(&pdev->dev, "Failed to request PCI memory\n"); 63d86fb45bSDan Carpenter ret = -EBUSY; 64a48742bcSJohannes Thumshirn goto out_disable; 65b71bb863SJohannes Thumshirn } 66b71bb863SJohannes Thumshirn 67d19366f1SAndreas Werner priv->base = devm_ioremap(&pdev->dev, priv->mapbase, CHAM_HEADER_SIZE); 68b71bb863SJohannes Thumshirn if (!priv->base) { 69b71bb863SJohannes Thumshirn dev_err(&pdev->dev, "Cannot ioremap\n"); 70b71bb863SJohannes Thumshirn ret = -ENOMEM; 71d19366f1SAndreas Werner goto out_disable; 72b71bb863SJohannes Thumshirn } 73b71bb863SJohannes Thumshirn 74b71bb863SJohannes Thumshirn flags = pci_resource_flags(pdev, 0); 75b71bb863SJohannes Thumshirn if (flags & IORESOURCE_IO) { 76b71bb863SJohannes Thumshirn ret = -ENOTSUPP; 77b71bb863SJohannes Thumshirn dev_err(&pdev->dev, 78b71bb863SJohannes Thumshirn "IO mapped PCI devices are not supported\n"); 79d19366f1SAndreas Werner goto out_disable; 80b71bb863SJohannes Thumshirn } 81b71bb863SJohannes Thumshirn 82b71bb863SJohannes Thumshirn pci_set_drvdata(pdev, priv); 83b71bb863SJohannes Thumshirn 844ec65b77SJohannes Thumshirn priv->bus = mcb_alloc_bus(&pdev->dev); 854ec65b77SJohannes Thumshirn if (IS_ERR(priv->bus)) { 864ec65b77SJohannes Thumshirn ret = PTR_ERR(priv->bus); 87d19366f1SAndreas Werner goto out_disable; 884ec65b77SJohannes Thumshirn } 894ec65b77SJohannes Thumshirn 904ec65b77SJohannes Thumshirn priv->bus->get_irq = mcb_pci_get_irq; 91b71bb863SJohannes Thumshirn 927b7c5491SJohannes Thumshirn ret = chameleon_parse_cells(priv->bus, priv->mapbase, priv->base); 93b71bb863SJohannes Thumshirn if (ret < 0) 9441ada9dfSAlexey Khoroshilov goto out_mcb_bus; 95b71bb863SJohannes Thumshirn 968cd1f9d0SAndreas Werner dev_dbg(&pdev->dev, "Found %d cells\n", ret); 97b71bb863SJohannes Thumshirn 98b71bb863SJohannes Thumshirn mcb_bus_add_devices(priv->bus); 99b71bb863SJohannes Thumshirn 1007b7c5491SJohannes Thumshirn return 0; 1017b7c5491SJohannes Thumshirn 10241ada9dfSAlexey Khoroshilov out_mcb_bus: 10341ada9dfSAlexey Khoroshilov mcb_release_bus(priv->bus); 104a48742bcSJohannes Thumshirn out_disable: 105b71bb863SJohannes Thumshirn pci_disable_device(pdev); 106b71bb863SJohannes Thumshirn return ret; 107b71bb863SJohannes Thumshirn } 108b71bb863SJohannes Thumshirn 109b71bb863SJohannes Thumshirn static void mcb_pci_remove(struct pci_dev *pdev) 110b71bb863SJohannes Thumshirn { 111b71bb863SJohannes Thumshirn struct priv *priv = pci_get_drvdata(pdev); 112b71bb863SJohannes Thumshirn 113b71bb863SJohannes Thumshirn mcb_release_bus(priv->bus); 1147b7c5491SJohannes Thumshirn 1157b7c5491SJohannes Thumshirn pci_disable_device(pdev); 116b71bb863SJohannes Thumshirn } 117b71bb863SJohannes Thumshirn 118b71bb863SJohannes Thumshirn static const struct pci_device_id mcb_pci_tbl[] = { 119b71bb863SJohannes Thumshirn { PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) }, 120*29ea6be3SJohannes Thumshirn { PCI_DEVICE(PCI_VENDOR_ID_ALTERA, PCI_DEVICE_ID_MEN_CHAMELEON) }, 121b71bb863SJohannes Thumshirn { 0 }, 122b71bb863SJohannes Thumshirn }; 123b71bb863SJohannes Thumshirn MODULE_DEVICE_TABLE(pci, mcb_pci_tbl); 124b71bb863SJohannes Thumshirn 125b71bb863SJohannes Thumshirn static struct pci_driver mcb_pci_driver = { 126b71bb863SJohannes Thumshirn .name = "mcb-pci", 127b71bb863SJohannes Thumshirn .id_table = mcb_pci_tbl, 128b71bb863SJohannes Thumshirn .probe = mcb_pci_probe, 129b71bb863SJohannes Thumshirn .remove = mcb_pci_remove, 130b71bb863SJohannes Thumshirn }; 131b71bb863SJohannes Thumshirn 132b71bb863SJohannes Thumshirn module_pci_driver(mcb_pci_driver); 133b71bb863SJohannes Thumshirn 134b71bb863SJohannes Thumshirn MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>"); 135b71bb863SJohannes Thumshirn MODULE_LICENSE("GPL"); 136b71bb863SJohannes Thumshirn MODULE_DESCRIPTION("MCB over PCI support"); 137