projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b71bb863 JT |
1 | /* |
| 2 | * MEN Chameleon Bus. | |
| 3 | * | |
| 4 | * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) | |
| 5 | * Author: Johannes Thumshirn <johannes.thumshirn@men.de> | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify it | |
| 8 | * under the terms of the GNU General Public License as published by the Free | |
| 9 | * Software Foundation; version 2 of the License. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/pci.h> | |
| 14 | #include <linux/mcb.h> | |
| 15 | ||
| 16 | #include "mcb-internal.h" | |
| 17 | ||
| 18 | struct priv { | |
| 19 | struct mcb_bus *bus; | |
| 20 | void __iomem *base; | |
| 21 | }; | |
| 22 | ||
| 23 | static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
| 24 | { | |
| 25 | struct priv *priv; | |
| 26 | phys_addr_t mapbase; | |
| 27 | int ret; | |
| 28 | int num_cells; | |
| 29 | unsigned long flags; | |
| 30 | ||
| 31 | priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL); | |
| 32 | if (!priv) | |
| 33 | return -ENOMEM; | |
| 34 | ||
| 35 | ret = pci_enable_device(pdev); | |
| 36 | if (ret) { | |
| 37 | dev_err(&pdev->dev, "Failed to enable PCI device\n"); | |
| 38 | return -ENODEV; | |
| 39 | } | |
| 40 | ||
| 41 | mapbase = pci_resource_start(pdev, 0); | |
| 42 | if (!mapbase) { | |
| 43 | dev_err(&pdev->dev, "No PCI resource\n"); | |
| 44 | goto err_start; | |
| 45 | } | |
| 46 | ||
| 47 | ret = pci_request_region(pdev, 0, KBUILD_MODNAME); | |
| 48 | if (ret) { | |
| 49 | dev_err(&pdev->dev, "Failed to request PCI BARs\n"); | |
| 50 | goto err_start; | |
| 51 | } | |
| 52 | ||
| 53 | priv->base = pci_iomap(pdev, 0, 0); | |
| 54 | if (!priv->base) { | |
| 55 | dev_err(&pdev->dev, "Cannot ioremap\n"); | |
| 56 | ret = -ENOMEM; | |
| 57 | goto err_ioremap; | |
| 58 | } | |
| 59 | ||
| 60 | flags = pci_resource_flags(pdev, 0); | |
| 61 | if (flags & IORESOURCE_IO) { | |
| 62 | ret = -ENOTSUPP; | |
| 63 | dev_err(&pdev->dev, | |
| 64 | "IO mapped PCI devices are not supported\n"); | |
| 65 | goto err_ioremap; | |
| 66 | } | |
| 67 | ||
| 68 | pci_set_drvdata(pdev, priv); | |
| 69 | ||
| 70 | priv->bus = mcb_alloc_bus(); | |
| 71 | ||
| 72 | ret = chameleon_parse_cells(priv->bus, mapbase, priv->base); | |
| 73 | if (ret < 0) | |
| 74 | goto err_drvdata; | |
| 75 | num_cells = ret; | |
| 76 | ||
| 77 | dev_dbg(&pdev->dev, "Found %d cells\n", num_cells); | |
| 78 | ||
| 79 | mcb_bus_add_devices(priv->bus); | |
| 80 | ||
| 81 | err_drvdata: | |
| 82 | pci_iounmap(pdev, priv->base); | |
| 83 | err_ioremap: | |
| 84 | pci_release_region(pdev, 0); | |
| 85 | err_start: | |
| 86 | pci_disable_device(pdev); | |
| 87 | return ret; | |
| 88 | } | |
| 89 | ||
| 90 | static void mcb_pci_remove(struct pci_dev *pdev) | |
| 91 | { | |
| 92 | struct priv *priv = pci_get_drvdata(pdev); | |
| 93 | ||
| 94 | mcb_release_bus(priv->bus); | |
| 95 | } | |
| 96 | ||
| 97 | static const struct pci_device_id mcb_pci_tbl[] = { | |
| 98 | { PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) }, | |
| 99 | { 0 }, | |
| 100 | }; | |
| 101 | MODULE_DEVICE_TABLE(pci, mcb_pci_tbl); | |
| 102 | ||
| 103 | static struct pci_driver mcb_pci_driver = { | |
| 104 | .name = "mcb-pci", | |
| 105 | .id_table = mcb_pci_tbl, | |
| 106 | .probe = mcb_pci_probe, | |
| 107 | .remove = mcb_pci_remove, | |
| 108 | }; | |
| 109 | ||
| 110 | module_pci_driver(mcb_pci_driver); | |
| 111 | ||
| 112 | MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>"); | |
| 113 | MODULE_LICENSE("GPL"); | |
| 114 | MODULE_DESCRIPTION("MCB over PCI support"); |