diff options
Diffstat (limited to 'drivers/net/wireless/ath9k/ahb.c')
| -rw-r--r-- | drivers/net/wireless/ath9k/ahb.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath9k/ahb.c b/drivers/net/wireless/ath9k/ahb.c new file mode 100644 index 000000000000..00cc7bb01f2e --- /dev/null +++ b/drivers/net/wireless/ath9k/ahb.c @@ -0,0 +1,192 @@ +/* + * Copyright (c) 2008 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_softc *sc, int *csz) +{ + *csz = L1_CACHE_BYTES >> 2; +} + +static void ath_ahb_cleanup(struct ath_softc *sc) +{ + iounmap(sc->mem); +} + +static bool ath_ahb_eeprom_read(struct ath_hw *ah, u32 off, u16 *data) +{ + struct ath_softc *sc = ah->ah_sc; + 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))) { + DPRINTF(ah->ah_sc, ATH_DBG_FATAL, + "%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 = { + .read_cachesize = ath_ahb_read_cachesize, + .cleanup = ath_ahb_cleanup, + + .eeprom_read = ath_ahb_eeprom_read, +}; + +static int ath_ahb_probe(struct platform_device *pdev) +{ + void __iomem *mem; + struct ath_wiphy *aphy; + struct ath_softc *sc; + struct ieee80211_hw *hw; + struct resource *res; + int irq; + int ret = 0; + struct ath_hw *ah; + + 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, res->end - res->start + 1); + 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_wiphy) + + 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); + + aphy = hw->priv; + sc = (struct ath_softc *) (aphy + 1); + aphy->sc = sc; + aphy->hw = hw; + sc->pri_wiphy = aphy; + sc->hw = hw; + sc->dev = &pdev->dev; + sc->mem = mem; + sc->bus_ops = &ath_ahb_bus_ops; + sc->irq = irq; + + ret = ath_attach(AR5416_AR9100_DEVID, sc); + if (ret != 0) { + dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret); + ret = -ENODEV; + goto err_free_hw; + } + + ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); + if (ret) { + dev_err(&pdev->dev, "request_irq failed, err=%d\n", ret); + ret = -EIO; + goto err_detach; + } + + ah = sc->sc_ah; + printk(KERN_INFO + "%s: Atheros AR%s MAC/BB Rev:%x, " + "AR%s RF Rev:%x, mem=0x%lx, irq=%d\n", + wiphy_name(hw->wiphy), + ath_mac_bb_name(ah->hw_version.macVersion), + ah->hw_version.macRev, + ath_rf_name((ah->hw_version.analog5GhzRev & AR_RADIO_SREV_MAJOR)), + ah->hw_version.phyRev, + (unsigned long)mem, irq); + + return 0; + + err_detach: + ath_detach(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_wiphy *aphy = hw->priv; + struct ath_softc *sc = aphy->sc; + + ath_cleanup(sc); + 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); +} |