diff options
Diffstat (limited to 'drivers/mcb')
| -rw-r--r-- | drivers/mcb/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/mcb/Makefile | 2 | ||||
| -rw-r--r-- | drivers/mcb/mcb-internal.h | 2 | ||||
| -rw-r--r-- | drivers/mcb/mcb-pci.c | 114 |
4 files changed, 132 insertions, 0 deletions
diff --git a/drivers/mcb/Kconfig b/drivers/mcb/Kconfig index 44c82d68c563..b8f5d469165c 100644 --- a/drivers/mcb/Kconfig +++ b/drivers/mcb/Kconfig @@ -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 diff --git a/drivers/mcb/Makefile b/drivers/mcb/Makefile index 2d9a751e93bd..1ae141311def 100644 --- a/drivers/mcb/Makefile +++ b/drivers/mcb/Makefile @@ -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 diff --git a/drivers/mcb/mcb-internal.h b/drivers/mcb/mcb-internal.h index db22777d0ac8..f956ef26c0ce 100644 --- a/drivers/mcb/mcb-internal.h +++ b/drivers/mcb/mcb-internal.h @@ -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 diff --git a/drivers/mcb/mcb-pci.c b/drivers/mcb/mcb-pci.c new file mode 100644 index 000000000000..99c742cbfb5b --- /dev/null +++ b/drivers/mcb/mcb-pci.c @@ -0,0 +1,114 @@ +/* + * 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"); |