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 int num_cells; 39b71bb863SJohannes Thumshirn unsigned long flags; 40b71bb863SJohannes Thumshirn 41b71bb863SJohannes Thumshirn priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL); 42b71bb863SJohannes Thumshirn if (!priv) 43b71bb863SJohannes Thumshirn return -ENOMEM; 44b71bb863SJohannes Thumshirn 45b71bb863SJohannes Thumshirn ret = pci_enable_device(pdev); 46b71bb863SJohannes Thumshirn if (ret) { 47b71bb863SJohannes Thumshirn dev_err(&pdev->dev, "Failed to enable PCI device\n"); 48b71bb863SJohannes Thumshirn return -ENODEV; 49b71bb863SJohannes Thumshirn } 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"); 54*bf25c199SAlexey Khoroshilov ret = -ENODEV; 55a48742bcSJohannes Thumshirn goto out_disable; 56b71bb863SJohannes Thumshirn } 57b71bb863SJohannes Thumshirn 587b7c5491SJohannes Thumshirn res = request_mem_region(priv->mapbase, CHAM_HEADER_SIZE, 597b7c5491SJohannes Thumshirn KBUILD_MODNAME); 60d86fb45bSDan Carpenter if (!res) { 617b7c5491SJohannes Thumshirn dev_err(&pdev->dev, "Failed to request PCI memory\n"); 62d86fb45bSDan Carpenter ret = -EBUSY; 63a48742bcSJohannes Thumshirn goto out_disable; 64b71bb863SJohannes Thumshirn } 65b71bb863SJohannes Thumshirn 667b7c5491SJohannes Thumshirn priv->base = ioremap(priv->mapbase, CHAM_HEADER_SIZE); 67b71bb863SJohannes Thumshirn if (!priv->base) { 68b71bb863SJohannes Thumshirn dev_err(&pdev->dev, "Cannot ioremap\n"); 69b71bb863SJohannes Thumshirn ret = -ENOMEM; 70a48742bcSJohannes Thumshirn goto out_release; 71b71bb863SJohannes Thumshirn } 72b71bb863SJohannes Thumshirn 73b71bb863SJohannes Thumshirn flags = pci_resource_flags(pdev, 0); 74b71bb863SJohannes Thumshirn if (flags & IORESOURCE_IO) { 75b71bb863SJohannes Thumshirn ret = -ENOTSUPP; 76b71bb863SJohannes Thumshirn dev_err(&pdev->dev, 77b71bb863SJohannes Thumshirn "IO mapped PCI devices are not supported\n"); 7841ada9dfSAlexey Khoroshilov goto out_iounmap; 79b71bb863SJohannes Thumshirn } 80b71bb863SJohannes Thumshirn 81b71bb863SJohannes Thumshirn pci_set_drvdata(pdev, priv); 82b71bb863SJohannes Thumshirn 834ec65b77SJohannes Thumshirn priv->bus = mcb_alloc_bus(&pdev->dev); 844ec65b77SJohannes Thumshirn if (IS_ERR(priv->bus)) { 854ec65b77SJohannes Thumshirn ret = PTR_ERR(priv->bus); 86a48742bcSJohannes Thumshirn goto out_iounmap; 874ec65b77SJohannes Thumshirn } 884ec65b77SJohannes Thumshirn 894ec65b77SJohannes Thumshirn priv->bus->get_irq = mcb_pci_get_irq; 90b71bb863SJohannes Thumshirn 917b7c5491SJohannes Thumshirn ret = chameleon_parse_cells(priv->bus, priv->mapbase, priv->base); 92b71bb863SJohannes Thumshirn if (ret < 0) 9341ada9dfSAlexey Khoroshilov goto out_mcb_bus; 94b71bb863SJohannes Thumshirn num_cells = ret; 95b71bb863SJohannes Thumshirn 96b71bb863SJohannes Thumshirn dev_dbg(&pdev->dev, "Found %d cells\n", num_cells); 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_iounmap: 1057b7c5491SJohannes Thumshirn iounmap(priv->base); 106a48742bcSJohannes Thumshirn out_release: 107b71bb863SJohannes Thumshirn pci_release_region(pdev, 0); 108a48742bcSJohannes Thumshirn out_disable: 109b71bb863SJohannes Thumshirn pci_disable_device(pdev); 110b71bb863SJohannes Thumshirn return ret; 111b71bb863SJohannes Thumshirn } 112b71bb863SJohannes Thumshirn 113b71bb863SJohannes Thumshirn static void mcb_pci_remove(struct pci_dev *pdev) 114b71bb863SJohannes Thumshirn { 115b71bb863SJohannes Thumshirn struct priv *priv = pci_get_drvdata(pdev); 116b71bb863SJohannes Thumshirn 117b71bb863SJohannes Thumshirn mcb_release_bus(priv->bus); 1187b7c5491SJohannes Thumshirn 1197b7c5491SJohannes Thumshirn iounmap(priv->base); 1207b7c5491SJohannes Thumshirn release_region(priv->mapbase, CHAM_HEADER_SIZE); 1217b7c5491SJohannes Thumshirn pci_disable_device(pdev); 122b71bb863SJohannes Thumshirn } 123b71bb863SJohannes Thumshirn 124b71bb863SJohannes Thumshirn static const struct pci_device_id mcb_pci_tbl[] = { 125b71bb863SJohannes Thumshirn { PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) }, 126b71bb863SJohannes Thumshirn { 0 }, 127b71bb863SJohannes Thumshirn }; 128b71bb863SJohannes Thumshirn MODULE_DEVICE_TABLE(pci, mcb_pci_tbl); 129b71bb863SJohannes Thumshirn 130b71bb863SJohannes Thumshirn static struct pci_driver mcb_pci_driver = { 131b71bb863SJohannes Thumshirn .name = "mcb-pci", 132b71bb863SJohannes Thumshirn .id_table = mcb_pci_tbl, 133b71bb863SJohannes Thumshirn .probe = mcb_pci_probe, 134b71bb863SJohannes Thumshirn .remove = mcb_pci_remove, 135b71bb863SJohannes Thumshirn }; 136b71bb863SJohannes Thumshirn 137b71bb863SJohannes Thumshirn module_pci_driver(mcb_pci_driver); 138b71bb863SJohannes Thumshirn 139b71bb863SJohannes Thumshirn MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>"); 140b71bb863SJohannes Thumshirn MODULE_LICENSE("GPL"); 141b71bb863SJohannes Thumshirn MODULE_DESCRIPTION("MCB over PCI support"); 142