From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764259AbYETJZg (ORCPT ); Tue, 20 May 2008 05:25:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761610AbYETJZA (ORCPT ); Tue, 20 May 2008 05:25:00 -0400 Received: from mail28.messagelabs.com ([216.82.249.131]:20812 "EHLO mail28.messagelabs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758779AbYETJY6 (ORCPT ); Tue, 20 May 2008 05:24:58 -0400 X-VirusChecked: Checked X-Env-Sender: Uwe.Kleine-Koenig@digi.com X-Msg-Ref: server-13.tower-28.messagelabs.com!1211275497!15554163!2 X-StarScan-Version: 5.5.12.14.2; banners=-,-,- X-Originating-IP: [66.77.174.14] From: =?utf-8?q?Uwe=20Kleine-K=C3=B6nig?= To: "Hans J. Koch" CC: Greg Kroah-Hartman , Subject: [PATCH] UIO: generic platform driver Date: Tue, 20 May 2008 11:24:42 +0200 Message-ID: <1211275482-11249-2-git-send-email-Uwe.Kleine-Koenig@digi.com> X-Mailer: git-send-email 1.5.5.1 In-Reply-To: <1211275482-11249-1-git-send-email-Uwe.Kleine-Koenig@digi.com> References: <20080520092312.GA10745@digi.com> <1211275482-11249-1-git-send-email-Uwe.Kleine-Koenig@digi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-OriginalArrivalTime: 20 May 2008 09:24:42.0337 (UTC) FILETIME=[55BE1510:01C8BA5B] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Uwe Kleine-König --- drivers/uio/Kconfig | 7 +++ drivers/uio/Makefile | 1 + drivers/uio/uio_pdrv.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 126 insertions(+), 0 deletions(-) create mode 100644 drivers/uio/uio_pdrv.c diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig index 78e139c..2e9079d 100644 --- a/drivers/uio/Kconfig +++ b/drivers/uio/Kconfig @@ -26,6 +26,13 @@ config UIO_CIF To compile this driver as a module, choose M here: the module will be called uio_cif. +config UIO_PDRV + tristate "Userspace I/O platform driver" + help + Generic platform driver for Userspace I/O devices. + + If you don't know what to do here, say N. + config UIO_SMX tristate "SMX cryptengine UIO interface" default n diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile index 18c4566..e00ce0d 100644 --- a/drivers/uio/Makefile +++ b/drivers/uio/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_UIO) += uio.o obj-$(CONFIG_UIO_CIF) += uio_cif.o +obj-$(CONFIG_UIO_PDRV) += uio_pdrv.o obj-$(CONFIG_UIO_SMX) += uio_smx.o diff --git a/drivers/uio/uio_pdrv.c b/drivers/uio/uio_pdrv.c new file mode 100644 index 0000000..5d0d2e8 --- /dev/null +++ b/drivers/uio/uio_pdrv.c @@ -0,0 +1,118 @@ +/* + * drivers/uio/uio_pdrv.c + * + * Copyright (C) 2008 by Digi International Inc. + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ +#include +#include +#include + +#define DRIVER_NAME "uio" + +struct uio_platdata { + struct uio_info *uioinfo; +}; + +static int uio_pdrv_probe(struct platform_device *pdev) +{ + struct uio_info *uioinfo = pdev->dev.platform_data; + struct uio_platdata *pdata; + struct uio_mem *uiomem; + int ret = -ENODEV; + int i; + + if (!uioinfo || !uioinfo->name || !uioinfo->version) { + dev_dbg(&pdev->dev, "%s: err_uioinfo\n", __func__); + goto err_uioinfo; + } + + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + ret = -ENOMEM; + dev_dbg(&pdev->dev, "%s: err_alloc_pdata\n", __func__); + goto err_alloc_pdata; + } + + pdata->uioinfo = uioinfo; + + uiomem = &uioinfo->mem[0]; + + for (i = 0; i < pdev->num_resources; ++i) { + struct resource *r = &pdev->resource[i]; + + if (r->flags != IORESOURCE_MEM) + continue; + + if (uiomem >= &uioinfo->mem[MAX_UIO_MAPS]) { + dev_warn(&pdev->dev, "device has more than " + __stringify(MAX_UIO_MAPS) + " I/O memory resources.\n"); + break; + } + + uiomem->memtype = UIO_MEM_PHYS; + uiomem->addr = r->start; + uiomem->size = r->end - r->start + 1; + ++uiomem; + } + + while (uiomem < &uioinfo->mem[MAX_UIO_MAPS]) { + uiomem->size = 0; + ++uiomem; + } + + pdata->uioinfo->priv = pdata; + + ret = uio_register_device(&pdev->dev, pdata->uioinfo); + + if (ret) { + kfree(pdata); +err_alloc_pdata: +err_uioinfo: + return ret; + } + + platform_set_drvdata(pdev, pdata); + + return 0; +} + +static int uio_pdrv_remove(struct platform_device *pdev) +{ + struct uio_platdata *pdata = platform_get_drvdata(pdev); + + uio_unregister_device(pdata->uioinfo); + + return 0; +} + +static struct platform_driver uio_pdrv = { + .probe = uio_pdrv_probe, + .remove = uio_pdrv_remove, + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, +}; + +static int __init uio_pdrv_init(void) +{ + return platform_driver_register(&uio_pdrv); +} + +static void __exit uio_pdrv_exit(void) +{ + platform_driver_unregister(&uio_pdrv); +} +module_init(uio_pdrv_init); +module_exit(uio_pdrv_exit); + +MODULE_AUTHOR("Uwe Kleine-Koenig"); +MODULE_DESCRIPTION("Userspace I/O platform driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRIVER_NAME); -- 1.5.5.1