forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
134 lines
2.8 KiB
134 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* MEN Chameleon Bus. |
|
* |
|
* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) |
|
* Author: Johannes Thumshirn <[email protected]> |
|
*/ |
|
|
|
#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; |
|
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; |
|
|
|
dev_dbg(&pdev->dev, "Found %d cells\n", ret); |
|
|
|
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 <[email protected]>"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_DESCRIPTION("MCB over PCI support"); |
|
MODULE_IMPORT_NS(MCB);
|
|
|