drivers/net/wireless/rt2x00/rt2x00pci.c

   1 /*
   2         Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
   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: rt2x00pci
  23         Abstract: rt2x00 generic pci device routines.
  24  */
  25
  26 #include <linux/dma-mapping.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/pci.h>
  30 #include <linux/slab.h>
  31
  32 #include "rt2x00.h"
  33 #include "rt2x00pci.h"
  34
  35 /*
  36  * PCI driver handlers.
  37  */
  38 static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
  39 {
  40         kfree(rt2x00dev->rf);
  41         rt2x00dev->rf = NULL;
  42
  43         kfree(rt2x00dev->eeprom);
  44         rt2x00dev->eeprom = NULL;
  45
  46         if (rt2x00dev->csr.base) {
  47                 iounmap(rt2x00dev->csr.base);
  48                 rt2x00dev->csr.base = NULL;
  49         }
  50 }
  51
  52 static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
  53 {
  54         struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
  55
  56         rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
  57         if (!rt2x00dev->csr.base)
  58                 goto exit;
  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         rt2x00_probe_err("Failed to allocate registers\n");
  72
  73         rt2x00pci_free_reg(rt2x00dev);
  74
  75         return -ENOMEM;
  76 }
  77
  78 int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
  79 {
  80         struct ieee80211_hw *hw;
  81         struct rt2x00_dev *rt2x00dev;
  82         int retval;
  83         u16 chip;
  84
  85         retval = pci_enable_device(pci_dev);
  86         if (retval) {
  87                 rt2x00_probe_err("Enable device failed\n");
  88                 return retval;
  89         }
  90
  91         retval = pci_request_regions(pci_dev, pci_name(pci_dev));
  92         if (retval) {
  93                 rt2x00_probe_err("PCI request regions failed\n");
  94                 goto exit_disable_device;
  95         }
  96
  97         pci_set_master(pci_dev);
  98
  99         if (pci_set_mwi(pci_dev))
 100                 rt2x00_probe_err("MWI not available\n");
 101
 102         if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
 103                 rt2x00_probe_err("PCI DMA not supported\n");
 104                 retval = -EIO;
 105                 goto exit_release_regions;
 106         }
 107
 108         hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
 109         if (!hw) {
 110                 rt2x00_probe_err("Failed to allocate hardware\n");
 111                 retval = -ENOMEM;
 112                 goto exit_release_regions;
 113         }
 114
 115         pci_set_drvdata(pci_dev, hw);
 116
 117         rt2x00dev = hw->priv;
 118         rt2x00dev->dev = &pci_dev->dev;
 119         rt2x00dev->ops = ops;
 120         rt2x00dev->hw = hw;
 121         rt2x00dev->irq = pci_dev->irq;
 122         rt2x00dev->name = ops->name;
 123
 124         if (pci_is_pcie(pci_dev))
 125                 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
 126         else
 127                 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
 128
 129         retval = rt2x00pci_alloc_reg(rt2x00dev);
 130         if (retval)
 131                 goto exit_free_device;
 132
 133         /*
 134          * Because rt3290 chip use different efuse offset to read efuse data.
 135          * So before read efuse it need to indicate it is the
 136          * rt3290 or not.
 137          */
 138         pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
 139         rt2x00dev->chip.rt = chip;
 140
 141         retval = rt2x00lib_probe_dev(rt2x00dev);
 142         if (retval)
 143                 goto exit_free_reg;
 144
 145         return 0;
 146
 147 exit_free_reg:
 148         rt2x00pci_free_reg(rt2x00dev);
 149
 150 exit_free_device:
 151         ieee80211_free_hw(hw);
 152
 153 exit_release_regions:
 154         pci_release_regions(pci_dev);
 155
 156 exit_disable_device:
 157         pci_disable_device(pci_dev);
 158
 159         pci_set_drvdata(pci_dev, NULL);
 160
 161         return retval;
 162 }
 163 EXPORT_SYMBOL_GPL(rt2x00pci_probe);
 164
 165 void rt2x00pci_remove(struct pci_dev *pci_dev)
 166 {
 167         struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
 168         struct rt2x00_dev *rt2x00dev = hw->priv;
 169
 170         /*
 171          * Free all allocated data.
 172          */
 173         rt2x00lib_remove_dev(rt2x00dev);
 174         rt2x00pci_free_reg(rt2x00dev);
 175         ieee80211_free_hw(hw);
 176
 177         /*
 178          * Free the PCI device data.
 179          */
 180         pci_set_drvdata(pci_dev, NULL);
 181         pci_disable_device(pci_dev);
 182         pci_release_regions(pci_dev);
 183 }
 184 EXPORT_SYMBOL_GPL(rt2x00pci_remove);
 185
 186 #ifdef CONFIG_PM
 187 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
 188 {
 189         struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
 190         struct rt2x00_dev *rt2x00dev = hw->priv;
 191         int retval;
 192
 193         retval = rt2x00lib_suspend(rt2x00dev, state);
 194         if (retval)
 195                 return retval;
 196
 197         pci_save_state(pci_dev);
 198         pci_disable_device(pci_dev);
 199         return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
 200 }
 201 EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
 202
 203 int rt2x00pci_resume(struct pci_dev *pci_dev)
 204 {
 205         struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
 206         struct rt2x00_dev *rt2x00dev = hw->priv;
 207
 208         if (pci_set_power_state(pci_dev, PCI_D0) ||
 209             pci_enable_device(pci_dev)) {
 210                 rt2x00_err(rt2x00dev, "Failed to resume device\n");
 211                 return -EIO;
 212         }
 213
 214         pci_restore_state(pci_dev);
 215         return rt2x00lib_resume(rt2x00dev);
 216 }
 217 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
 218 #endif /* CONFIG_PM */
 219
 220 /*
 221  * rt2x00pci module information.
 222  */
 223 MODULE_AUTHOR(DRV_PROJECT);
 224 MODULE_VERSION(DRV_VERSION);
 225 MODULE_DESCRIPTION("rt2x00 pci library");
 226 MODULE_LICENSE("GPL");