drivers/net/wireless/rt2x00/rt2x00soc.c

   1 /*
   2         Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00soc
  23         Abstract: rt2x00 generic soc device routines.
  24  */
  25
  26 #include <linux/bug.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/platform_device.h>
  30
  31 #include "rt2x00.h"
  32 #include "rt2x00soc.h"
  33
  34 static 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
  43 static int rt2x00soc_alloc_reg(struct rt2x00_dev *rt2x00dev)
  44 {
  45         struct platform_device *pdev = to_platform_device(rt2x00dev->dev);
  46         struct resource *res;
  47
  48         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  49         if (!res)
  50                 return -ENODEV;
  51
  52         rt2x00dev->csr.base = (void __iomem *)KSEG1ADDR(res->start);
  53         if (!rt2x00dev->csr.base)
  54                 goto exit;
  55
  56         rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
  57         if (!rt2x00dev->eeprom)
  58                 goto exit;
  59
  60         rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
  61         if (!rt2x00dev->rf)
  62                 goto exit;
  63
  64         return 0;
  65
  66 exit:
  67         ERROR_PROBE("Failed to allocate registers.\n");
  68         rt2x00soc_free_reg(rt2x00dev);
  69
  70         return -ENOMEM;
  71 }
  72
  73 int rt2x00soc_probe(struct platform_device *pdev,
  74                     const unsigned short chipset,
  75                     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                 ERROR_PROBE("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         rt2x00_set_chip_rt(rt2x00dev, chipset);
  97
  98         retval = rt2x00soc_alloc_reg(rt2x00dev);
  99         if (retval)
 100                 goto exit_free_device;
 101
 102         retval = rt2x00lib_probe_dev(rt2x00dev);
 103         if (retval)
 104                 goto exit_free_reg;
 105
 106         return 0;
 107
 108 exit_free_reg:
 109         rt2x00soc_free_reg(rt2x00dev);
 110
 111 exit_free_device:
 112         ieee80211_free_hw(hw);
 113
 114         return retval;
 115 }
 116
 117 int rt2x00soc_remove(struct platform_device *pdev)
 118 {
 119         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 120         struct rt2x00_dev *rt2x00dev = hw->priv;
 121
 122         /*
 123          * Free all allocated data.
 124          */
 125         rt2x00lib_remove_dev(rt2x00dev);
 126         rt2x00soc_free_reg(rt2x00dev);
 127         ieee80211_free_hw(hw);
 128
 129         return 0;
 130 }
 131 EXPORT_SYMBOL_GPL(rt2x00soc_remove);
 132
 133 #ifdef CONFIG_PM
 134 int rt2x00soc_suspend(struct platform_device *pdev, pm_message_t state)
 135 {
 136         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 137         struct rt2x00_dev *rt2x00dev = hw->priv;
 138
 139         return rt2x00lib_suspend(rt2x00dev, state);
 140 }
 141 EXPORT_SYMBOL_GPL(rt2x00soc_suspend);
 142
 143 int rt2x00soc_resume(struct platform_device *pdev)
 144 {
 145         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 146         struct rt2x00_dev *rt2x00dev = hw->priv;
 147
 148         return rt2x00lib_resume(rt2x00dev);
 149 }
 150 EXPORT_SYMBOL_GPL(rt2x00soc_resume);
 151 #endif /* CONFIG_PM */
 152
 153 /*
 154  * rt2x00soc module information.
 155  */
 156 MODULE_AUTHOR(DRV_PROJECT);
 157 MODULE_VERSION(DRV_VERSION);
 158 MODULE_DESCRIPTION("rt2x00 soc library");
 159 MODULE_LICENSE("GPL");