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Commit b71bb863 authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by Greg Kroah-Hartman
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mcb: Add PCI carrier for MEN Chameleon Bus 



Add support for MCB over PCI devices. Both PCI attached on-board Chameleon FPGAs
as well as CompactPCI based MCB carrier cards are supported with this driver.

Signed-off-by: default avatarJohannes Thumshirn <johannes.thumshirn@men.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3764e82e

drivers/mcb/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -13,3 +13,17 @@ menuconfig MCB 
	   for these devices.



	   If build as a module, the module is called mcb.ko



if MCB

config MCB_PCI

	   tristate "PCI based MCB carrier"

	   default m

	   help



	   This is a MCB carrier on a PCI device. Both PCI attached on-board

	   FPGAs as well as CompactPCI attached MCB FPGAs are supported with

	   this driver.



	   If build as a module, the module is called mcb-pci.ko



endif # MCB

drivers/mcb/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -3,3 +3,5 @@ obj-$(CONFIG_MCB) += mcb.o 


mcb-y += mcb-core.o

mcb-y += mcb-parse.o



obj-$(CONFIG_MCB_PCI) += mcb-pci.o

drivers/mcb/mcb-internal.h

+2 −0
Original line number Diff line number Diff line
@@ -3,6 +3,8 @@ 


#include <linux/types.h>



#define PCI_VENDOR_ID_MEN		0x1a88

#define PCI_DEVICE_ID_MEN_CHAMELEON	0x4d45

#define CHAMELEON_FILENAME_LEN		12

#define CHAMELEONV2_MAGIC		0xabce

drivers/mcb/mcb-pci.c

0 → 100644
+114 −0
Original line number Diff line number Diff line 
/*

 * 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");