drivers/pci/host/pcie-iproc-bcma.c

   1 /*
   2  * Copyright (C) 2015 Broadcom Corporation
   3  * Copyright (C) 2015 Hauke Mehrtens <hauke@hauke-m.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation version 2.
   8  *
   9  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  10  * kind, whether express or implied; without even the implied warranty
  11  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/pci.h>
  17 #include <linux/module.h>
  18 #include <linux/slab.h>
  19 #include <linux/phy/phy.h>
  20 #include <linux/bcma/bcma.h>
  21 #include <linux/ioport.h>
  22
  23 #include "pcie-iproc.h"
  24
  25
  26 /* NS: CLASS field is R/O, and set to wrong 0x200 value */
  27 static void bcma_pcie2_fixup_class(struct pci_dev *dev)
  28 {
  29         dev->class = PCI_CLASS_BRIDGE_PCI << 8;
  30 }
  31 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8011, bcma_pcie2_fixup_class);
  32 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8012, bcma_pcie2_fixup_class);
  33
  34 static int iproc_pcie_bcma_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  35 {
  36         struct pci_sys_data *sys = dev->sysdata;
  37         struct iproc_pcie *pcie = sys->private_data;
  38         struct bcma_device *bdev = container_of(pcie->dev, struct bcma_device, dev);
  39
  40         return bcma_core_irq(bdev, 5);
  41 }
  42
  43 static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
  44 {
  45         struct device *dev = &bdev->dev;
  46         struct iproc_pcie *pcie;
  47         LIST_HEAD(resources);
  48         struct pci_host_bridge *bridge;
  49         int ret;
  50
  51         bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
  52         if (!bridge)
  53                 return -ENOMEM;
  54
  55         pcie = pci_host_bridge_priv(bridge);
  56
  57         pcie->dev = dev;
  58
  59         pcie->type = IPROC_PCIE_PAXB_BCMA;
  60         pcie->base = bdev->io_addr;
  61         if (!pcie->base) {
  62                 dev_err(dev, "no controller registers\n");
  63                 return -ENOMEM;
  64         }
  65
  66         pcie->base_addr = bdev->addr;
  67
  68         pcie->mem.start = bdev->addr_s[0];
  69         pcie->mem.end = bdev->addr_s[0] + SZ_128M - 1;
  70         pcie->mem.name = "PCIe MEM space";
  71         pcie->mem.flags = IORESOURCE_MEM;
  72         pci_add_resource(&resources, &pcie->mem);
  73
  74         pcie->map_irq = iproc_pcie_bcma_map_irq;
  75
  76         ret = iproc_pcie_setup(pcie, &resources);
  77         if (ret) {
  78                 dev_err(dev, "PCIe controller setup failed\n");
  79                 pci_free_resource_list(&resources);
  80                 return ret;
  81         }
  82
  83         bcma_set_drvdata(bdev, pcie);
  84         return 0;
  85 }
  86
  87 static void iproc_pcie_bcma_remove(struct bcma_device *bdev)
  88 {
  89         struct iproc_pcie *pcie = bcma_get_drvdata(bdev);
  90
  91         iproc_pcie_remove(pcie);
  92 }
  93
  94 static const struct bcma_device_id iproc_pcie_bcma_table[] = {
  95         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_PCIEG2, BCMA_ANY_REV, BCMA_ANY_CLASS),
  96         {},
  97 };
  98 MODULE_DEVICE_TABLE(bcma, iproc_pcie_bcma_table);
  99
 100 static struct bcma_driver iproc_pcie_bcma_driver = {
 101         .name           = KBUILD_MODNAME,
 102         .id_table       = iproc_pcie_bcma_table,
 103         .probe          = iproc_pcie_bcma_probe,
 104         .remove         = iproc_pcie_bcma_remove,
 105 };
 106
 107 static int __init iproc_pcie_bcma_init(void)
 108 {
 109         return bcma_driver_register(&iproc_pcie_bcma_driver);
 110 }
 111 module_init(iproc_pcie_bcma_init);
 112
 113 static void __exit iproc_pcie_bcma_exit(void)
 114 {
 115         bcma_driver_unregister(&iproc_pcie_bcma_driver);
 116 }
 117 module_exit(iproc_pcie_bcma_exit);
 118
 119 MODULE_AUTHOR("Hauke Mehrtens");
 120 MODULE_DESCRIPTION("Broadcom iProc PCIe BCMA driver");
 121 MODULE_LICENSE("GPL v2");