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