rt2x00soc.c

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/*
    Copyright (C) 2004 - 2009 Ivo van Doorn <[email protected]>
    Copyright (C) 2004 - 2009 Felix Fietkau <[email protected]>
    <http://rt2x00.serialmonkey.com>

    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; either version 2 of the License, or
    (at your option) any later version.

    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.,
    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
    Module: rt2x00soc
    Abstract: rt2x00 generic soc device routines.
 */

#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include "rt2x00.h"
#include "rt2x00soc.h"

static void rt2x00soc_free_reg(struct rt2x00_dev *rt2x00dev)
{
    kfree(rt2x00dev->rf);
    rt2x00dev->rf = NULL;

    kfree(rt2x00dev->eeprom);
    rt2x00dev->eeprom = NULL;

    iounmap(rt2x00dev->csr.base);
}

static int rt2x00soc_alloc_reg(struct rt2x00_dev *rt2x00dev)
{
    struct platform_device *pdev = to_platform_device(rt2x00dev->dev);
    struct resource *res;

    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    if (!res)
        return -ENODEV;

    rt2x00dev->csr.base = ioremap(res->start, resource_size(res));
    if (!rt2x00dev->csr.base)
        return -ENOMEM;

    rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
    if (!rt2x00dev->eeprom)
        goto exit;

    rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
    if (!rt2x00dev->rf)
        goto exit;

    return 0;

exit:
    ERROR_PROBE("Failed to allocate registers.\n");
    rt2x00soc_free_reg(rt2x00dev);

    return -ENOMEM;
}

int rt2x00soc_probe(struct platform_device *pdev, const struct rt2x00_ops *ops)
{
    struct ieee80211_hw *hw;
    struct rt2x00_dev *rt2x00dev;
    int retval;

    hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
    if (!hw) {
        ERROR_PROBE("Failed to allocate hardware.\n");
        return -ENOMEM;
    }

    platform_set_drvdata(pdev, hw);

    rt2x00dev = hw->priv;
    rt2x00dev->dev = &pdev->dev;
    rt2x00dev->ops = ops;
    rt2x00dev->hw = hw;
    rt2x00dev->irq = platform_get_irq(pdev, 0);
    rt2x00dev->name = pdev->dev.driver->name;

    rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);

    retval = rt2x00soc_alloc_reg(rt2x00dev);
    if (retval)
        goto exit_free_device;

    retval = rt2x00lib_probe_dev(rt2x00dev);
    if (retval)
        goto exit_free_reg;

    return 0;

exit_free_reg:
    rt2x00soc_free_reg(rt2x00dev);

exit_free_device:
    ieee80211_free_hw(hw);

    return retval;
}
EXPORT_SYMBOL_GPL(rt2x00soc_probe);

int rt2x00soc_remove(struct platform_device *pdev)
{
    struct ieee80211_hw *hw = platform_get_drvdata(pdev);
    struct rt2x00_dev *rt2x00dev = hw->priv;

    /*
     * Free all allocated data.
     */
    rt2x00lib_remove_dev(rt2x00dev);
    rt2x00soc_free_reg(rt2x00dev);
    ieee80211_free_hw(hw);

    return 0;
}
EXPORT_SYMBOL_GPL(rt2x00soc_remove);

#ifdef CONFIG_PM
int rt2x00soc_suspend(struct platform_device *pdev, pm_message_t state)
{
    struct ieee80211_hw *hw = platform_get_drvdata(pdev);
    struct rt2x00_dev *rt2x00dev = hw->priv;

    return rt2x00lib_suspend(rt2x00dev, state);
}
EXPORT_SYMBOL_GPL(rt2x00soc_suspend);

int rt2x00soc_resume(struct platform_device *pdev)
{
    struct ieee80211_hw *hw = platform_get_drvdata(pdev);
    struct rt2x00_dev *rt2x00dev = hw->priv;

    return rt2x00lib_resume(rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00soc_resume);
#endif /* CONFIG_PM */

/*
 * rt2x00soc module information.
 */
MODULE_AUTHOR(DRV_PROJECT);
MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("rt2x00 soc library");
MODULE_LICENSE("GPL");