Messages in this thread | | | Date | Tue, 20 May 2008 23:08:44 +0200 | From | "Hans J. Koch" <> | Subject | Re: [PATCH] UIO: generic platform driver |
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On Tue, May 20, 2008 at 11:24:42AM +0200, Uwe Kleine-König wrote: > Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: Hans J. Koch <hjk@linutronix.de>
> --- > 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 <linux/platform_device.h> > +#include <linux/uio_driver.h> > +#include <linux/stringify.h> > + > +#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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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