LXR linux/drivers/usb/gadget/udc/bdc/bdc

   1/*
   2 * bdc_pci.c - BRCM BDC USB3.0 device controller PCI interface file.
   3 *
   4 * Copyright (C) 2014 Broadcom Corporation
   5 *
   6 * Author: Ashwini Pahuja
   7 *
   8 * Based on drivers under drivers/usb/
   9 *
  10 * This program is free software; you can redistribute it and/or modify it
  11 * under the terms of the GNU General Public License as published by the
  12 * Free Software Foundation; either version 2 of the License, or (at your
  13 * option) any later version.
  14 *
  15 */
  16
  17#include <linux/kernel.h>
  18#include <linux/module.h>
  19#include <linux/slab.h>
  20#include <linux/pci.h>
  21#include <linux/pci_ids.h>
  22#include <linux/platform_device.h>
  23
  24#include "bdc.h"
  25
  26#define BDC_PCI_PID 0x1570
  27
  28struct bdc_pci {
  29        struct device *dev;
  30        struct platform_device *bdc;
  31};
  32
  33static int bdc_setup_msi(struct pci_dev *pci)
  34{
  35        int ret;
  36
  37        ret = pci_enable_msi(pci);
  38        if (ret) {
  39                pr_err("failed to allocate MSI entry\n");
  40                return ret;
  41        }
  42
  43        return ret;
  44}
  45
  46static int bdc_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
  47{
  48        struct resource res[2];
  49        struct platform_device *bdc;
  50        struct bdc_pci *glue;
  51        int ret = -ENOMEM;
  52
  53        glue = devm_kzalloc(&pci->dev, sizeof(*glue), GFP_KERNEL);
  54        if (!glue)
  55                return -ENOMEM;
  56
  57        glue->dev = &pci->dev;
  58        ret = pci_enable_device(pci);
  59        if (ret) {
  60                dev_err(&pci->dev, "failed to enable pci device\n");
  61                return -ENODEV;
  62        }
  63        pci_set_master(pci);
  64
  65        bdc = platform_device_alloc(BRCM_BDC_NAME, PLATFORM_DEVID_AUTO);
  66        if (!bdc)
  67                return -ENOMEM;
  68
  69        memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
  70        bdc_setup_msi(pci);
  71
  72        res[0].start    = pci_resource_start(pci, 0);
  73        res[0].end      = pci_resource_end(pci, 0);
  74        res[0].name     = BRCM_BDC_NAME;
  75        res[0].flags    = IORESOURCE_MEM;
  76
  77        res[1].start    = pci->irq;
  78        res[1].name     = BRCM_BDC_NAME;
  79        res[1].flags    = IORESOURCE_IRQ;
  80
  81        ret = platform_device_add_resources(bdc, res, ARRAY_SIZE(res));
  82        if (ret) {
  83                dev_err(&pci->dev,
  84                        "couldn't add resources to bdc device\n");
  85                return ret;
  86        }
  87
  88        pci_set_drvdata(pci, glue);
  89
  90        dma_set_coherent_mask(&bdc->dev, pci->dev.coherent_dma_mask);
  91
  92        bdc->dev.dma_mask = pci->dev.dma_mask;
  93        bdc->dev.dma_parms = pci->dev.dma_parms;
  94        bdc->dev.parent = &pci->dev;
  95        glue->bdc = bdc;
  96
  97        ret = platform_device_add(bdc);
  98        if (ret) {
  99                dev_err(&pci->dev, "failed to register bdc device\n");
 100                platform_device_put(bdc);
 101                return ret;
 102        }
 103
 104        return 0;
 105}
 106
 107static void bdc_pci_remove(struct pci_dev *pci)
 108{
 109        struct bdc_pci *glue = pci_get_drvdata(pci);
 110
 111        platform_device_unregister(glue->bdc);
 112        pci_disable_msi(pci);
 113}
 114
 115static struct pci_device_id bdc_pci_id_table[] = {
 116        { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BDC_PCI_PID), },
 117        {} /* Terminating Entry */
 118};
 119
 120MODULE_DEVICE_TABLE(pci, bdc_pci_id_table);
 121
 122static struct pci_driver bdc_pci_driver = {
 123        .name = "bdc-pci",
 124        .id_table = bdc_pci_id_table,
 125        .probe = bdc_pci_probe,
 126        .remove = bdc_pci_remove,
 127};
 128
 129MODULE_AUTHOR("Ashwini Pahuja <ashwini.linux@gmail.com>");
 130MODULE_LICENSE("GPL");
 131MODULE_DESCRIPTION("BRCM BDC USB3 PCI Glue layer");
 132module_pci_driver(bdc_pci_driver);
 133