103 строки
2.5 KiB
C
103 строки
2.5 KiB
C
/*
|
|
* Support for Xilinx SPI platform devices
|
|
* Copyright (c) 2009 Intel Corporation
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
/* Supports:
|
|
* Xilinx SPI devices as platform devices
|
|
*
|
|
* Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/spi/spi_bitbang.h>
|
|
#include <linux/spi/xilinx_spi.h>
|
|
|
|
#include "xilinx_spi.h"
|
|
|
|
static int __devinit xilinx_spi_probe(struct platform_device *dev)
|
|
{
|
|
struct xspi_platform_data *pdata;
|
|
struct resource *r;
|
|
int irq;
|
|
struct spi_master *master;
|
|
u8 i;
|
|
|
|
pdata = dev->dev.platform_data;
|
|
if (!pdata)
|
|
return -ENODEV;
|
|
|
|
r = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
|
if (!r)
|
|
return -ENODEV;
|
|
|
|
irq = platform_get_irq(dev, 0);
|
|
if (irq < 0)
|
|
return -ENXIO;
|
|
|
|
master = xilinx_spi_init(&dev->dev, r, irq, dev->id);
|
|
if (!master)
|
|
return -ENODEV;
|
|
|
|
for (i = 0; i < pdata->num_devices; i++)
|
|
spi_new_device(master, pdata->devices + i);
|
|
|
|
platform_set_drvdata(dev, master);
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit xilinx_spi_remove(struct platform_device *dev)
|
|
{
|
|
xilinx_spi_deinit(platform_get_drvdata(dev));
|
|
platform_set_drvdata(dev, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* work with hotplug and coldplug */
|
|
MODULE_ALIAS("platform:" XILINX_SPI_NAME);
|
|
|
|
static struct platform_driver xilinx_spi_driver = {
|
|
.probe = xilinx_spi_probe,
|
|
.remove = __devexit_p(xilinx_spi_remove),
|
|
.driver = {
|
|
.name = XILINX_SPI_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init xilinx_spi_pltfm_init(void)
|
|
{
|
|
return platform_driver_register(&xilinx_spi_driver);
|
|
}
|
|
module_init(xilinx_spi_pltfm_init);
|
|
|
|
static void __exit xilinx_spi_pltfm_exit(void)
|
|
{
|
|
platform_driver_unregister(&xilinx_spi_driver);
|
|
}
|
|
module_exit(xilinx_spi_pltfm_exit);
|
|
|
|
MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
|
|
MODULE_DESCRIPTION("Xilinx SPI platform driver");
|
|
MODULE_LICENSE("GPL v2");
|