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/*
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:
ERROR_PROBE("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) {
ERROR_PROBE("Enable device failed.\n");
return retval;
}
retval = pci_request_regions(pci_dev, pci_name(pci_dev));
if (retval) {
ERROR_PROBE("PCI request regions failed.\n");
goto exit_disable_device;
}
pci_set_master(pci_dev);
if (pci_set_mwi(pci_dev))
ERROR_PROBE("MWI not available.\n");
if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
ERROR_PROBE("PCI DMA not supported.\n");
retval = -EIO;
goto exit_release_regions;
}
hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
if (!hw) {
ERROR_PROBE("Failed to allocate hardware.\n");
retval = -ENOMEM;
goto exit_release_regions;
}
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_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);
/*
* 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)) {
ERROR(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");
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