115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/*
|
|
* MEN Chameleon Bus.
|
|
*
|
|
* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
|
|
* Author: Johannes Thumshirn <johannes.thumshirn@men.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; version 2 of the License.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/mcb.h>
|
|
|
|
#include "mcb-internal.h"
|
|
|
|
struct priv {
|
|
struct mcb_bus *bus;
|
|
void __iomem *base;
|
|
};
|
|
|
|
static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
|
{
|
|
struct priv *priv;
|
|
phys_addr_t mapbase;
|
|
int ret;
|
|
int num_cells;
|
|
unsigned long flags;
|
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
ret = pci_enable_device(pdev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to enable PCI device\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
mapbase = pci_resource_start(pdev, 0);
|
|
if (!mapbase) {
|
|
dev_err(&pdev->dev, "No PCI resource\n");
|
|
goto err_start;
|
|
}
|
|
|
|
ret = pci_request_region(pdev, 0, KBUILD_MODNAME);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to request PCI BARs\n");
|
|
goto err_start;
|
|
}
|
|
|
|
priv->base = pci_iomap(pdev, 0, 0);
|
|
if (!priv->base) {
|
|
dev_err(&pdev->dev, "Cannot ioremap\n");
|
|
ret = -ENOMEM;
|
|
goto err_ioremap;
|
|
}
|
|
|
|
flags = pci_resource_flags(pdev, 0);
|
|
if (flags & IORESOURCE_IO) {
|
|
ret = -ENOTSUPP;
|
|
dev_err(&pdev->dev,
|
|
"IO mapped PCI devices are not supported\n");
|
|
goto err_ioremap;
|
|
}
|
|
|
|
pci_set_drvdata(pdev, priv);
|
|
|
|
priv->bus = mcb_alloc_bus();
|
|
|
|
ret = chameleon_parse_cells(priv->bus, mapbase, priv->base);
|
|
if (ret < 0)
|
|
goto err_drvdata;
|
|
num_cells = ret;
|
|
|
|
dev_dbg(&pdev->dev, "Found %d cells\n", num_cells);
|
|
|
|
mcb_bus_add_devices(priv->bus);
|
|
|
|
err_drvdata:
|
|
pci_iounmap(pdev, priv->base);
|
|
err_ioremap:
|
|
pci_release_region(pdev, 0);
|
|
err_start:
|
|
pci_disable_device(pdev);
|
|
return ret;
|
|
}
|
|
|
|
static void mcb_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
struct priv *priv = pci_get_drvdata(pdev);
|
|
|
|
mcb_release_bus(priv->bus);
|
|
}
|
|
|
|
static const struct pci_device_id mcb_pci_tbl[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) },
|
|
{ 0 },
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, mcb_pci_tbl);
|
|
|
|
static struct pci_driver mcb_pci_driver = {
|
|
.name = "mcb-pci",
|
|
.id_table = mcb_pci_tbl,
|
|
.probe = mcb_pci_probe,
|
|
.remove = mcb_pci_remove,
|
|
};
|
|
|
|
module_pci_driver(mcb_pci_driver);
|
|
|
|
MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("MCB over PCI support");
|