diff options
Diffstat (limited to 'kernel/drivers/net/wireless/ath/ath9k/ahb.c')
| -rw-r--r-- | kernel/drivers/net/wireless/ath/ath9k/ahb.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/kernel/drivers/net/wireless/ath/ath9k/ahb.c b/kernel/drivers/net/wireless/ath/ath9k/ahb.c new file mode 100644 index 000000000..bd4a1a655 --- /dev/null +++ b/kernel/drivers/net/wireless/ath/ath9k/ahb.c @@ -0,0 +1,196 @@ +/* + * Copyright (c) 2008-2011 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 <linux/module.h> +#include "ath9k.h" + +static const struct platform_device_id ath9k_platform_id_table[] = { + { + .name = "ath9k", + .driver_data = AR5416_AR9100_DEVID, + }, + { + .name = "ar933x_wmac", + .driver_data = AR9300_DEVID_AR9330, + }, + { + .name = "ar934x_wmac", + .driver_data = AR9300_DEVID_AR9340, + }, + { + .name = "qca955x_wmac", + .driver_data = AR9300_DEVID_QCA955X, + }, + { + .name = "qca953x_wmac", + .driver_data = AR9300_DEVID_AR953X, + }, + { + .name = "qca956x_wmac", + .driver_data = AR9300_DEVID_QCA956X, + }, + {}, +}; + +/* 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 = dev_get_platdata(&pdev->dev); + 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; + const struct platform_device_id *id = platform_get_device_id(pdev); + int irq; + int ret = 0; + struct ath_hw *ah; + char hw_name[64]; + + if (!dev_get_platdata(&pdev->dev)) { + dev_err(&pdev->dev, "no platform data specified\n"); + return -EINVAL; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res == NULL) { + dev_err(&pdev->dev, "no memory resource found\n"); + return -ENXIO; + } + + mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res)); + if (mem == NULL) { + dev_err(&pdev->dev, "ioremap failed\n"); + return -ENOMEM; + } + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (res == NULL) { + dev_err(&pdev->dev, "no IRQ resource found\n"); + return -ENXIO; + } + + irq = res->start; + + ath9k_fill_chanctx_ops(); + hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); + if (hw == NULL) { + dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); + return -ENOMEM; + } + + 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; + + 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(id->driver_data, sc, &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); + 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; + + ath9k_deinit_device(sc); + free_irq(sc->irq, sc); + ieee80211_free_hw(sc->hw); + } + + return 0; +} + +static struct platform_driver ath_ahb_driver = { + .probe = ath_ahb_probe, + .remove = ath_ahb_remove, + .driver = { + .name = "ath9k", + }, + .id_table = ath9k_platform_id_table, +}; + +MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); + +int ath_ahb_init(void) +{ + return platform_driver_register(&ath_ahb_driver); +} + +void ath_ahb_exit(void) +{ + platform_driver_unregister(&ath_ahb_driver); +} |