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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2015 Broadcom Corporation
   4  * Copyright (C) 2015 Hauke Mehrtens <hauke@hauke-m.de>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/pci.h>
   9 #include <linux/module.h>
  10 #include <linux/slab.h>
  11 #include <linux/phy/phy.h>
  12 #include <linux/bcma/bcma.h>
  13 #include <linux/ioport.h>
  14
  15 #include "pcie-iproc.h"
  16
  17
  18 /* NS: CLASS field is R/O, and set to wrong 0x200 value */
  19 static void bcma_pcie2_fixup_class(struct pci_dev *dev)
  20 {
  21         dev->class = PCI_CLASS_BRIDGE_PCI << 8;
  22 }
  23 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8011, bcma_pcie2_fixup_class);
  24 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8012, bcma_pcie2_fixup_class);
  25
  26 static int iproc_pcie_bcma_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  27 {
  28         struct pci_sys_data *sys = dev->sysdata;
  29         struct iproc_pcie *pcie = sys->private_data;
  30         struct bcma_device *bdev = container_of(pcie->dev, struct bcma_device, dev);
  31
  32         return bcma_core_irq(bdev, 5);
  33 }
  34
  35 static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
  36 {
  37         struct device *dev = &bdev->dev;
  38         struct iproc_pcie *pcie;
  39         LIST_HEAD(resources);
  40         struct pci_host_bridge *bridge;
  41         int ret;
  42
  43         bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
  44         if (!bridge)
  45                 return -ENOMEM;
  46
  47         pcie = pci_host_bridge_priv(bridge);
  48
  49         pcie->dev = dev;
  50
  51         pcie->type = IPROC_PCIE_PAXB_BCMA;
  52         pcie->base = bdev->io_addr;
  53         if (!pcie->base) {
  54                 dev_err(dev, "no controller registers\n");
  55                 return -ENOMEM;
  56         }
  57
  58         pcie->base_addr = bdev->addr;
  59
  60         pcie->mem.start = bdev->addr_s[0];
  61         pcie->mem.end = bdev->addr_s[0] + SZ_128M - 1;
  62         pcie->mem.name = "PCIe MEM space";
  63         pcie->mem.flags = IORESOURCE_MEM;
  64         pci_add_resource(&resources, &pcie->mem);
  65
  66         pcie->map_irq = iproc_pcie_bcma_map_irq;
  67
  68         ret = iproc_pcie_setup(pcie, &resources);
  69         if (ret) {
  70                 dev_err(dev, "PCIe controller setup failed\n");
  71                 pci_free_resource_list(&resources);
  72                 return ret;
  73         }
  74
  75         bcma_set_drvdata(bdev, pcie);
  76         return 0;
  77 }
  78
  79 static void iproc_pcie_bcma_remove(struct bcma_device *bdev)
  80 {
  81         struct iproc_pcie *pcie = bcma_get_drvdata(bdev);
  82
  83         iproc_pcie_remove(pcie);
  84 }
  85
  86 static const struct bcma_device_id iproc_pcie_bcma_table[] = {
  87         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_PCIEG2, BCMA_ANY_REV, BCMA_ANY_CLASS),
  88         {},
  89 };
  90 MODULE_DEVICE_TABLE(bcma, iproc_pcie_bcma_table);
  91
  92 static struct bcma_driver iproc_pcie_bcma_driver = {
  93         .name           = KBUILD_MODNAME,
  94         .id_table       = iproc_pcie_bcma_table,
  95         .probe          = iproc_pcie_bcma_probe,
  96         .remove         = iproc_pcie_bcma_remove,
  97 };
  98
  99 static int __init iproc_pcie_bcma_init(void)
 100 {
 101         return bcma_driver_register(&iproc_pcie_bcma_driver);
 102 }
 103 module_init(iproc_pcie_bcma_init);
 104
 105 static void __exit iproc_pcie_bcma_exit(void)
 106 {
 107         bcma_driver_unregister(&iproc_pcie_bcma_driver);
 108 }
 109 module_exit(iproc_pcie_bcma_exit);
 110
 111 MODULE_AUTHOR("Hauke Mehrtens");
 112 MODULE_DESCRIPTION("Broadcom iProc PCIe BCMA driver");
 113 MODULE_LICENSE("GPL v2");