drivers/net/wireless/ralink/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, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 /*
  20         Module: rt2x00pci
  21         Abstract: rt2x00 generic pci device routines.
  22  */
  23
  24 #include <linux/dma-mapping.h>
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/pci.h>
  28 #include <linux/slab.h>
  29
  30 #include "rt2x00.h"
  31 #include "rt2x00pci.h"
  32
  33 /*
  34  * PCI driver handlers.
  35  */
  36 static void rt2x00pci_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         if (rt2x00dev->csr.base) {
  45                 iounmap(rt2x00dev->csr.base);
  46                 rt2x00dev->csr.base = NULL;
  47         }
  48 }
  49
  50 static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
  51 {
  52         struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
  53
  54         rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
  55         if (!rt2x00dev->csr.base)
  56                 goto exit;
  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
  71         rt2x00pci_free_reg(rt2x00dev);
  72
  73         return -ENOMEM;
  74 }
  75
  76 int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
  77 {
  78         struct ieee80211_hw *hw;
  79         struct rt2x00_dev *rt2x00dev;
  80         int retval;
  81         u16 chip;
  82
  83         retval = pci_enable_device(pci_dev);
  84         if (retval) {
  85                 rt2x00_probe_err("Enable device failed\n");
  86                 return retval;
  87         }
  88
  89         retval = pci_request_regions(pci_dev, pci_name(pci_dev));
  90         if (retval) {
  91                 rt2x00_probe_err("PCI request regions failed\n");
  92                 goto exit_disable_device;
  93         }
  94
  95         pci_set_master(pci_dev);
  96
  97         if (pci_set_mwi(pci_dev))
  98                 rt2x00_probe_err("MWI not available\n");
  99
 100         if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
 101                 rt2x00_probe_err("PCI DMA not supported\n");
 102                 retval = -EIO;
 103                 goto exit_release_regions;
 104         }
 105
 106         hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
 107         if (!hw) {
 108                 rt2x00_probe_err("Failed to allocate hardware\n");
 109                 retval = -ENOMEM;
 110                 goto exit_release_regions;
 111         }
 112
 113         pci_set_drvdata(pci_dev, hw);
 114
 115         rt2x00dev = hw->priv;
 116         rt2x00dev->dev = &pci_dev->dev;
 117         rt2x00dev->ops = ops;
 118         rt2x00dev->hw = hw;
 119         rt2x00dev->irq = pci_dev->irq;
 120         rt2x00dev->name = ops->name;
 121
 122         if (pci_is_pcie(pci_dev))
 123                 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
 124         else
 125                 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
 126
 127         retval = rt2x00pci_alloc_reg(rt2x00dev);
 128         if (retval)
 129                 goto exit_free_device;
 130
 131         /*
 132          * Because rt3290 chip use different efuse offset to read efuse data.
 133          * So before read efuse it need to indicate it is the
 134          * rt3290 or not.
 135          */
 136         pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
 137         rt2x00dev->chip.rt = chip;
 138
 139         retval = rt2x00lib_probe_dev(rt2x00dev);
 140         if (retval)
 141                 goto exit_free_reg;
 142
 143         return 0;
 144
 145 exit_free_reg:
 146         rt2x00pci_free_reg(rt2x00dev);
 147
 148 exit_free_device:
 149         ieee80211_free_hw(hw);
 150
 151 exit_release_regions:
 152         pci_clear_mwi(pci_dev);
 153         pci_release_regions(pci_dev);
 154
 155 exit_disable_device:
 156         pci_disable_device(pci_dev);
 157
 158         return retval;
 159 }
 160 EXPORT_SYMBOL_GPL(rt2x00pci_probe);
 161
 162 void rt2x00pci_remove(struct pci_dev *pci_dev)
 163 {
 164         struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
 165         struct rt2x00_dev *rt2x00dev = hw->priv;
 166
 167         /*
 168          * Free all allocated data.
 169          */
 170         rt2x00lib_remove_dev(rt2x00dev);
 171         rt2x00pci_free_reg(rt2x00dev);
 172         ieee80211_free_hw(hw);
 173
 174         /*
 175          * Free the PCI device data.
 176          */
 177         pci_clear_mwi(pci_dev);
 178         pci_disable_device(pci_dev);
 179         pci_release_regions(pci_dev);
 180 }
 181 EXPORT_SYMBOL_GPL(rt2x00pci_remove);
 182
 183 #ifdef CONFIG_PM
 184 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
 185 {
 186         struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
 187         struct rt2x00_dev *rt2x00dev = hw->priv;
 188         int retval;
 189
 190         retval = rt2x00lib_suspend(rt2x00dev, state);
 191         if (retval)
 192                 return retval;
 193
 194         pci_save_state(pci_dev);
 195         pci_disable_device(pci_dev);
 196         return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
 197 }
 198 EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
 199
 200 int rt2x00pci_resume(struct pci_dev *pci_dev)
 201 {
 202         struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
 203         struct rt2x00_dev *rt2x00dev = hw->priv;
 204
 205         if (pci_set_power_state(pci_dev, PCI_D0) ||
 206             pci_enable_device(pci_dev)) {
 207                 rt2x00_err(rt2x00dev, "Failed to resume device\n");
 208                 return -EIO;
 209         }
 210
 211         pci_restore_state(pci_dev);
 212         return rt2x00lib_resume(rt2x00dev);
 213 }
 214 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
 215 #endif /* CONFIG_PM */
 216
 217 /*
 218  * rt2x00pci module information.
 219  */
 220 MODULE_AUTHOR(DRV_PROJECT);
 221 MODULE_VERSION(DRV_VERSION);
 222 MODULE_DESCRIPTION("rt2x00 pci library");
 223 MODULE_LICENSE("GPL");