158 lines
3.5 KiB
C
158 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* MEN Chameleon Bus.
|
|
*
|
|
* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
|
|
* Author: Johannes Thumshirn <johannes.thumshirn@men.de>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/mcb.h>
|
|
|
|
#include "mcb-internal.h"
|
|
|
|
struct priv {
|
|
struct mcb_bus *bus;
|
|
phys_addr_t mapbase;
|
|
void __iomem *base;
|
|
};
|
|
|
|
static int mcb_pci_get_irq(struct mcb_device *mdev)
|
|
{
|
|
struct mcb_bus *mbus = mdev->bus;
|
|
struct device *dev = mbus->carrier;
|
|
struct pci_dev *pdev = to_pci_dev(dev);
|
|
|
|
return pdev->irq;
|
|
}
|
|
|
|
static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
|
{
|
|
struct resource *res;
|
|
struct priv *priv;
|
|
int ret, table_size;
|
|
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;
|
|
}
|
|
pci_set_master(pdev);
|
|
|
|
priv->mapbase = pci_resource_start(pdev, 0);
|
|
if (!priv->mapbase) {
|
|
dev_err(&pdev->dev, "No PCI resource\n");
|
|
ret = -ENODEV;
|
|
goto out_disable;
|
|
}
|
|
|
|
res = devm_request_mem_region(&pdev->dev, priv->mapbase,
|
|
CHAM_HEADER_SIZE,
|
|
KBUILD_MODNAME);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Failed to request PCI memory\n");
|
|
ret = -EBUSY;
|
|
goto out_disable;
|
|
}
|
|
|
|
priv->base = devm_ioremap(&pdev->dev, priv->mapbase, CHAM_HEADER_SIZE);
|
|
if (!priv->base) {
|
|
dev_err(&pdev->dev, "Cannot ioremap\n");
|
|
ret = -ENOMEM;
|
|
goto out_disable;
|
|
}
|
|
|
|
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 out_disable;
|
|
}
|
|
|
|
pci_set_drvdata(pdev, priv);
|
|
|
|
priv->bus = mcb_alloc_bus(&pdev->dev);
|
|
if (IS_ERR(priv->bus)) {
|
|
ret = PTR_ERR(priv->bus);
|
|
goto out_disable;
|
|
}
|
|
|
|
priv->bus->get_irq = mcb_pci_get_irq;
|
|
|
|
ret = chameleon_parse_cells(priv->bus, priv->mapbase, priv->base);
|
|
if (ret < 0)
|
|
goto out_mcb_bus;
|
|
|
|
table_size = ret;
|
|
|
|
if (table_size < CHAM_HEADER_SIZE) {
|
|
/* Release the previous resources */
|
|
devm_iounmap(&pdev->dev, priv->base);
|
|
devm_release_mem_region(&pdev->dev, priv->mapbase, CHAM_HEADER_SIZE);
|
|
|
|
/* Then, allocate it again with the actual chameleon table size */
|
|
res = devm_request_mem_region(&pdev->dev, priv->mapbase,
|
|
table_size,
|
|
KBUILD_MODNAME);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Failed to request PCI memory\n");
|
|
ret = -EBUSY;
|
|
goto out_mcb_bus;
|
|
}
|
|
|
|
priv->base = devm_ioremap(&pdev->dev, priv->mapbase, table_size);
|
|
if (!priv->base) {
|
|
dev_err(&pdev->dev, "Cannot ioremap\n");
|
|
ret = -ENOMEM;
|
|
goto out_mcb_bus;
|
|
}
|
|
}
|
|
|
|
mcb_bus_add_devices(priv->bus);
|
|
|
|
return 0;
|
|
|
|
out_mcb_bus:
|
|
mcb_release_bus(priv->bus);
|
|
out_disable:
|
|
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);
|
|
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
static const struct pci_device_id mcb_pci_tbl[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) },
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_ALTERA, 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");
|
|
MODULE_IMPORT_NS(MCB);
|