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
  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         iounmap(rt2x00dev->csr.base);
  43 }
  44
  45 static 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
  68 exit:
  69         rt2x00_probe_err("Failed to allocate registers\n");
  70         rt2x00soc_free_reg(rt2x00dev);
  71
  72         return -ENOMEM;
  73 }
  74
  75 int 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
 112 exit_free_reg:
 113         rt2x00soc_free_reg(rt2x00dev);
 114
 115 exit_free_device:
 116         ieee80211_free_hw(hw);
 117
 118         return retval;
 119 }
 120 EXPORT_SYMBOL_GPL(rt2x00soc_probe);
 121
 122 int 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 }
 136 EXPORT_SYMBOL_GPL(rt2x00soc_remove);
 137
 138 #ifdef CONFIG_PM
 139 int 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 }
 146 EXPORT_SYMBOL_GPL(rt2x00soc_suspend);
 147
 148 int 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 }
 155 EXPORT_SYMBOL_GPL(rt2x00soc_resume);
 156 #endif /* CONFIG_PM */
 157
 158 /*
 159  * rt2x00soc module information.
 160  */
 161 MODULE_AUTHOR(DRV_PROJECT);
 162 MODULE_VERSION(DRV_VERSION);
 163 MODULE_DESCRIPTION("rt2x00 soc library");
 164 MODULE_LICENSE("GPL");