LXR linux/drivers/net/wireless/ralink/rt2x00/rt2x00soc.c

   1/*
   2        Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
   3        Copyright (C) 2004 - 2009 Felix Fietkau <nbd@openwrt.org>
   4        <http://rt2x00.serialmonkey.com>
   5
   6        This program is free software; you can redistribute it and/or modify
   7        it under the terms of the GNU General Public License as published by
   8        the Free Software Foundation; either version 2 of the License, or
   9        (at your option) any later version.
  10
  11        This program is distributed in the hope that it will be useful,
  12        but WITHOUT ANY WARRANTY; without even the implied warranty of
  13        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14        GNU General Public License for more details.
  15
  16        You should have received a copy of the GNU General Public License
  17        along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20/*
  21        Module: rt2x00soc
  22        Abstract: rt2x00 generic soc device routines.
  23 */
  24
  25#include <linux/bug.h>
  26#include <linux/kernel.h>
  27#include <linux/module.h>
  28#include <linux/platform_device.h>
  29#include <linux/slab.h>
  30
  31#include "rt2x00.h"
  32#include "rt2x00soc.h"
  33
  34static void rt2x00soc_free_reg(struct rt2x00_dev *rt2x00dev)
  35{
  36        kfree(rt2x00dev->rf);
  37        rt2x00dev->rf = NULL;
  38
  39        kfree(rt2x00dev->eeprom);
  40        rt2x00dev->eeprom = NULL;
  41
  42        iounmap(rt2x00dev->csr.base);
  43}
  44
  45static int rt2x00soc_alloc_reg(struct rt2x00_dev *rt2x00dev)
  46{
  47        struct platform_device *pdev = to_platform_device(rt2x00dev->dev);
  48        struct resource *res;
  49
  50        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  51        if (!res)
  52                return -ENODEV;
  53
  54        rt2x00dev->csr.base = ioremap(res->start, resource_size(res));
  55        if (!rt2x00dev->csr.base)
  56                return -ENOMEM;
  57
  58        rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
  59        if (!rt2x00dev->eeprom)
  60                goto exit;
  61
  62        rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
  63        if (!rt2x00dev->rf)
  64                goto exit;
  65
  66        return 0;
  67
  68exit:
  69        rt2x00_probe_err("Failed to allocate registers\n");
  70        rt2x00soc_free_reg(rt2x00dev);
  71
  72        return -ENOMEM;
  73}
  74
  75int rt2x00soc_probe(struct platform_device *pdev, const struct rt2x00_ops *ops)
  76{
  77        struct ieee80211_hw *hw;
  78        struct rt2x00_dev *rt2x00dev;
  79        int retval;
  80
  81        hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
  82        if (!hw) {
  83                rt2x00_probe_err("Failed to allocate hardware\n");
  84                return -ENOMEM;
  85        }
  86
  87        platform_set_drvdata(pdev, hw);
  88
  89        rt2x00dev = hw->priv;
  90        rt2x00dev->dev = &pdev->dev;
  91        rt2x00dev->ops = ops;
  92        rt2x00dev->hw = hw;
  93        rt2x00dev->irq = platform_get_irq(pdev, 0);
  94        rt2x00dev->name = pdev->dev.driver->name;
  95
  96        rt2x00dev->clk = clk_get(&pdev->dev, NULL);
  97        if (IS_ERR(rt2x00dev->clk))
  98                rt2x00dev->clk = NULL;
  99
 100        rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
 101
 102        retval = rt2x00soc_alloc_reg(rt2x00dev);
 103        if (retval)
 104                goto exit_free_device;
 105
 106        retval = rt2x00lib_probe_dev(rt2x00dev);
 107        if (retval)
 108                goto exit_free_reg;
 109
 110        return 0;
 111
 112exit_free_reg:
 113        rt2x00soc_free_reg(rt2x00dev);
 114
 115exit_free_device:
 116        ieee80211_free_hw(hw);
 117
 118        return retval;
 119}
 120EXPORT_SYMBOL_GPL(rt2x00soc_probe);
 121
 122int rt2x00soc_remove(struct platform_device *pdev)
 123{
 124        struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 125        struct rt2x00_dev *rt2x00dev = hw->priv;
 126
 127        /*
 128         * Free all allocated data.
 129         */
 130        rt2x00lib_remove_dev(rt2x00dev);
 131        rt2x00soc_free_reg(rt2x00dev);
 132        ieee80211_free_hw(hw);
 133
 134        return 0;
 135}
 136EXPORT_SYMBOL_GPL(rt2x00soc_remove);
 137
 138#ifdef CONFIG_PM
 139int rt2x00soc_suspend(struct platform_device *pdev, pm_message_t state)
 140{
 141        struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 142        struct rt2x00_dev *rt2x00dev = hw->priv;
 143
 144        return rt2x00lib_suspend(rt2x00dev, state);
 145}
 146EXPORT_SYMBOL_GPL(rt2x00soc_suspend);
 147
 148int rt2x00soc_resume(struct platform_device *pdev)
 149{
 150        struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 151        struct rt2x00_dev *rt2x00dev = hw->priv;
 152
 153        return rt2x00lib_resume(rt2x00dev);
 154}
 155EXPORT_SYMBOL_GPL(rt2x00soc_resume);
 156#endif /* CONFIG_PM */
 157
 158/*
 159 * rt2x00soc module information.
 160 */
 161MODULE_AUTHOR(DRV_PROJECT);
 162MODULE_VERSION(DRV_VERSION);
 163MODULE_DESCRIPTION("rt2x00 soc library");
 164MODULE_LICENSE("GPL");
 165