text: /*
  	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
  	<http://rt2x00.serialmonkey.com>
  
  	This program is free software; you can redistribute it and/or modify
  	it under the terms of the GNU General Public License as published by
  	the Free Software Foundation; either version 2 of the License, or
  	(at your option) any later version.
  
  	This program is distributed in the hope that it will be useful,
  	but WITHOUT ANY WARRANTY; without even the implied warranty of
  	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  	GNU General Public License for more details.
  
  	You should have received a copy of the GNU General Public License
  	along with this program; if not, write to the
  	Free Software Foundation, Inc.,
  	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   */
  
  /*
  	Module: rt2x00pci
  	Abstract: rt2x00 generic pci device routines.
   */
  
  #include <linux/dma-mapping.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/pci.h>
  #include <linux/slab.h>
  
  #include "rt2x00.h"
  #include "rt2x00pci.h"
  
  /*
   * PCI driver handlers.
   */
  static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
  {
  	kfree(rt2x00dev->rf);
  	rt2x00dev->rf = NULL;
  
  	kfree(rt2x00dev->eeprom);
  	rt2x00dev->eeprom = NULL;
  
  	if (rt2x00dev->csr.base) {
  		iounmap(rt2x00dev->csr.base);
  		rt2x00dev->csr.base = NULL;
  	}
  }
  
  static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
  {
  	struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
  
  	rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
  	if (!rt2x00dev->csr.base)
  		goto exit;
  
  	rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
  	if (!rt2x00dev->eeprom)
  		goto exit;
  
  	rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
  	if (!rt2x00dev->rf)
  		goto exit;
  
  	return 0;
  
  exit:
  	rt2x00_probe_err("Failed to allocate registers\n");
  
  	rt2x00pci_free_reg(rt2x00dev);
  
  	return -ENOMEM;
  }
  
  int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
  {
  	struct ieee80211_hw *hw;
  	struct rt2x00_dev *rt2x00dev;
  	int retval;
  	u16 chip;
  
  	retval = pci_enable_device(pci_dev);
  	if (retval) {
  		rt2x00_probe_err("Enable device failed\n");
  		return retval;
  	}
  
  	retval = pci_request_regions(pci_dev, pci_name(pci_dev));
  	if (retval) {
  		rt2x00_probe_err("PCI request regions failed\n");
  		goto exit_disable_device;
  	}
  
  	pci_set_master(pci_dev);
  
  	if (pci_set_mwi(pci_dev))
  		rt2x00_probe_err("MWI not available\n");
  
  	if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
  		rt2x00_probe_err("PCI DMA not supported\n");
  		retval = -EIO;
  		goto exit_release_regions;
  	}
  
  	pci_enable_msi(pci_dev);
  
  	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
  	if (!hw) {
  		rt2x00_probe_err("Failed to allocate hardware\n");
  		retval = -ENOMEM;
  		goto exit_disable_msi;
  	}
  
  	pci_set_drvdata(pci_dev, hw);
  
  	rt2x00dev = hw->priv;
  	rt2x00dev->dev = &pci_dev->dev;
  	rt2x00dev->ops = ops;
  	rt2x00dev->hw = hw;
  	rt2x00dev->irq = pci_dev->irq;
  	rt2x00dev->name = pci_name(pci_dev);
  
  	if (pci_is_pcie(pci_dev))
  		rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
  	else
  		rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
  
  	retval = rt2x00pci_alloc_reg(rt2x00dev);
  	if (retval)
  		goto exit_free_device;
  
  	/*
  	 * Because rt3290 chip use different efuse offset to read efuse data.
  	 * So before read efuse it need to indicate it is the
  	 * rt3290 or not.
  	 */
  	pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
  	rt2x00dev->chip.rt = chip;
  
  	retval = rt2x00lib_probe_dev(rt2x00dev);
  	if (retval)
  		goto exit_free_reg;
  
  	return 0;
  
  exit_free_reg:
  	rt2x00pci_free_reg(rt2x00dev);
  
  exit_free_device:
  	ieee80211_free_hw(hw);
  
  exit_disable_msi:
  	pci_disable_msi(pci_dev);
  
  exit_release_regions:
  	pci_release_regions(pci_dev);
  
  exit_disable_device:
  	pci_disable_device(pci_dev);
  
  	pci_set_drvdata(pci_dev, NULL);
  
  	return retval;
  }
  EXPORT_SYMBOL_GPL(rt2x00pci_probe);
  
  void rt2x00pci_remove(struct pci_dev *pci_dev)
  {
  	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
  	struct rt2x00_dev *rt2x00dev = hw->priv;
  
  	/*
  	 * Free all allocated data.
  	 */
  	rt2x00lib_remove_dev(rt2x00dev);
  	rt2x00pci_free_reg(rt2x00dev);
  	ieee80211_free_hw(hw);
  
  	pci_disable_msi(pci_dev);
  
  	/*
  	 * Free the PCI device data.
  	 */
  	pci_set_drvdata(pci_dev, NULL);
  	pci_disable_device(pci_dev);
  	pci_release_regions(pci_dev);
  }
  EXPORT_SYMBOL_GPL(rt2x00pci_remove);
  
  #ifdef CONFIG_PM
  int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
  {
  	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
  	struct rt2x00_dev *rt2x00dev = hw->priv;
  	int retval;
  
  	retval = rt2x00lib_suspend(rt2x00dev, state);
  	if (retval)
  		return retval;
  
  	pci_save_state(pci_dev);
  	pci_disable_device(pci_dev);
  	return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
  }
  EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
  
  int rt2x00pci_resume(struct pci_dev *pci_dev)
  {
  	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
  	struct rt2x00_dev *rt2x00dev = hw->priv;
  
  	if (pci_set_power_state(pci_dev, PCI_D0) ||
  	    pci_enable_device(pci_dev)) {
  		rt2x00_err(rt2x00dev, "Failed to resume device\n");
  		return -EIO;
  	}
  
  	pci_restore_state(pci_dev);
  	return rt2x00lib_resume(rt2x00dev);
  }
  EXPORT_SYMBOL_GPL(rt2x00pci_resume);
  #endif /* CONFIG_PM */
  
  /*
   * rt2x00pci module information.
   */
  MODULE_AUTHOR(DRV_PROJECT);
  MODULE_VERSION(DRV_VERSION);
  MODULE_DESCRIPTION("rt2x00 pci library");
  MODULE_LICENSE("GPL");
  