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/*
* Copyright (c) 2008-2009 Atheros Communications Inc.
* Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/nl80211.h>
#include <linux/platform_device.h>
#include <linux/ath9k_platform.h>
#include "ath9k.h"
/* return bus cachesize in 4B word units */
static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
{
*csz = L1_CACHE_BYTES >> 2;
}
static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
{
struct ath_softc *sc = (struct ath_softc *)common->priv;
struct platform_device *pdev = to_platform_device(sc->dev);
struct ath9k_platform_data *pdata;
pdata = (struct ath9k_platform_data *) pdev->dev.platform_data;
if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
ath_err(common,
"%s: flash read failed, offset %08x is out of range\n",
__func__, off);
return false;
}
*data = pdata->eeprom_data[off];
return true;
}
static struct ath_bus_ops ath_ahb_bus_ops = {
.ath_bus_type = ATH_AHB,
.read_cachesize = ath_ahb_read_cachesize,
.eeprom_read = ath_ahb_eeprom_read,
};
static int ath_ahb_probe(struct platform_device *pdev)
{
void __iomem *mem;
struct ath_softc *sc;
struct ieee80211_hw *hw;
struct resource *res;
int irq;
int ret = 0;
struct ath_hw *ah;
char hw_name[64];
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "no platform data specified\n");
ret = -EINVAL;
goto err_out;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "no memory resource found\n");
ret = -ENXIO;
goto err_out;
}
mem = ioremap_nocache(res->start, resource_size(res));
if (mem == NULL) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -ENOMEM;
goto err_out;
}
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res == NULL) {
dev_err(&pdev->dev, "no IRQ resource found\n");
ret = -ENXIO;
goto err_iounmap;
}
irq = res->start;
hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
if (hw == NULL) {
dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
ret = -ENOMEM;
goto err_iounmap;
}
SET_IEEE80211_DEV(hw, &pdev->dev);
platform_set_drvdata(pdev, hw);
sc = hw->priv;
sc->hw = hw;
sc->dev = &pdev->dev;
sc->mem = mem;
sc->irq = irq;
/* Will be cleared in ath9k_start() */
sc->sc_flags |= SC_OP_INVALID;
ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
if (ret) {
dev_err(&pdev->dev, "request_irq failed\n");
goto err_free_hw;
}
ret = ath9k_init_device(AR5416_AR9100_DEVID, sc, 0x0, &ath_ahb_bus_ops);
if (ret) {
dev_err(&pdev->dev, "failed to initialize device\n");
goto err_irq;
}
ah = sc->sc_ah;
ath9k_hw_name(ah, hw_name, sizeof(hw_name));
wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
hw_name, (unsigned long)mem, irq);
return 0;
err_irq:
free_irq(irq, sc);
err_free_hw:
ieee80211_free_hw(hw);
platform_set_drvdata(pdev, NULL);
err_iounmap:
iounmap(mem);
err_out:
return ret;
}
static int ath_ahb_remove(struct platform_device *pdev)
{
struct ieee80211_hw *hw = platform_get_drvdata(pdev);
if (hw) {
struct ath_softc *sc = hw->priv;
void __iomem *mem = sc->mem;
ath9k_deinit_device(sc);
free_irq(sc->irq, sc);
ieee80211_free_hw(sc->hw);
iounmap(mem);
platform_set_drvdata(pdev, NULL);
}
return 0;
}
static struct platform_driver ath_ahb_driver = {
.probe = ath_ahb_probe,
.remove = ath_ahb_remove,
.driver = {
.name = "ath9k",
.owner = THIS_MODULE,
},
};
int ath_ahb_init(void)
{
return platform_driver_register(&ath_ahb_driver);
}
void ath_ahb_exit(void)
{
platform_driver_unregister(&ath_ahb_driver);
}
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