drivers/net/wireless/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, write to the
  18         Free Software Foundation, Inc.,
  19         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 /*
  23         Module: rt2x00soc
  24         Abstract: rt2x00 generic soc device routines.
  25  */
  26
  27 #include <linux/bug.h>
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/platform_device.h>
  31
  32 #include "rt2x00.h"
  33 #include "rt2x00soc.h"
  34
  35 static void rt2x00soc_free_reg(struct rt2x00_dev *rt2x00dev)
  36 {
  37         kfree(rt2x00dev->rf);
  38         rt2x00dev->rf = NULL;
  39
  40         kfree(rt2x00dev->eeprom);
  41         rt2x00dev->eeprom = NULL;
  42 }
  43
  44 static int rt2x00soc_alloc_reg(struct rt2x00_dev *rt2x00dev)
  45 {
  46         struct platform_device *pdev = to_platform_device(rt2x00dev->dev);
  47         struct resource *res;
  48
  49         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  50         if (!res)
  51                 return -ENODEV;
  52
  53         rt2x00dev->csr.base = (void __iomem *)KSEG1ADDR(res->start);
  54         if (!rt2x00dev->csr.base)
  55                 goto exit;
  56
  57         rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
  58         if (!rt2x00dev->eeprom)
  59                 goto exit;
  60
  61         rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
  62         if (!rt2x00dev->rf)
  63                 goto exit;
  64
  65         return 0;
  66
  67 exit:
  68         ERROR_PROBE("Failed to allocate registers.\n");
  69         rt2x00soc_free_reg(rt2x00dev);
  70
  71         return -ENOMEM;
  72 }
  73
  74 int rt2x00soc_probe(struct platform_device *pdev, const struct rt2x00_ops *ops)
  75 {
  76         struct ieee80211_hw *hw;
  77         struct rt2x00_dev *rt2x00dev;
  78         int retval;
  79
  80         hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
  81         if (!hw) {
  82                 ERROR_PROBE("Failed to allocate hardware.\n");
  83                 return -ENOMEM;
  84         }
  85
  86         platform_set_drvdata(pdev, hw);
  87
  88         rt2x00dev = hw->priv;
  89         rt2x00dev->dev = &pdev->dev;
  90         rt2x00dev->ops = ops;
  91         rt2x00dev->hw = hw;
  92         rt2x00dev->irq = platform_get_irq(pdev, 0);
  93         rt2x00dev->name = pdev->dev.driver->name;
  94
  95         rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
  96
  97         retval = rt2x00soc_alloc_reg(rt2x00dev);
  98         if (retval)
  99                 goto exit_free_device;
 100
 101         retval = rt2x00lib_probe_dev(rt2x00dev);
 102         if (retval)
 103                 goto exit_free_reg;
 104
 105         return 0;
 106
 107 exit_free_reg:
 108         rt2x00soc_free_reg(rt2x00dev);
 109
 110 exit_free_device:
 111         ieee80211_free_hw(hw);
 112
 113         return retval;
 114 }
 115
 116 int rt2x00soc_remove(struct platform_device *pdev)
 117 {
 118         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 119         struct rt2x00_dev *rt2x00dev = hw->priv;
 120
 121         /*
 122          * Free all allocated data.
 123          */
 124         rt2x00lib_remove_dev(rt2x00dev);
 125         rt2x00soc_free_reg(rt2x00dev);
 126         ieee80211_free_hw(hw);
 127
 128         return 0;
 129 }
 130 EXPORT_SYMBOL_GPL(rt2x00soc_remove);
 131
 132 #ifdef CONFIG_PM
 133 int rt2x00soc_suspend(struct platform_device *pdev, pm_message_t state)
 134 {
 135         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 136         struct rt2x00_dev *rt2x00dev = hw->priv;
 137
 138         return rt2x00lib_suspend(rt2x00dev, state);
 139 }
 140 EXPORT_SYMBOL_GPL(rt2x00soc_suspend);
 141
 142 int rt2x00soc_resume(struct platform_device *pdev)
 143 {
 144         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 145         struct rt2x00_dev *rt2x00dev = hw->priv;
 146
 147         return rt2x00lib_resume(rt2x00dev);
 148 }
 149 EXPORT_SYMBOL_GPL(rt2x00soc_resume);
 150 #endif /* CONFIG_PM */
 151
 152 /*
 153  * rt2x00soc module information.
 154  */
 155 MODULE_AUTHOR(DRV_PROJECT);
 156 MODULE_VERSION(DRV_VERSION);
 157 MODULE_DESCRIPTION("rt2x00 soc library");
 158 MODULE_LICENSE("GPL");