ath9k: introduce platform driver for AHB bus support (09329d37) · Commits · 戴 / test

drivers/net/wireless/ath9k/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -12,6 +12,7 @@ ath9k-y += hw.o \
		rc.o

		ath9k-$(CONFIG_PCI) += pci.o
		ath9k-$(CONFIG_ATHEROS_AR71XX) += ahb.o
		ath9k-$(CONFIG_ATH9K_DEBUG) += debug.o

		obj-$(CONFIG_ATH9K) += ath9k.o

drivers/net/wireless/ath9k/ahb.c

0 → 100644

+160 −0

Original line number	Diff line number	Diff line
		/*
		* 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 "core.h"
		#include "reg.h"
		#include "hw.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 struct ath_bus_ops ath_ahb_bus_ops = {
		.read_cachesize = ath_ahb_read_cachesize,
		.cleanup = ath_ahb_cleanup,
		};

		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_hal *ah;

		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_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->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->ah_macVersion),
		ah->ah_macRev,
		ath_rf_name((ah->ah_analog5GhzRev & AR_RADIO_SREV_MAJOR)),
		ah->ah_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_softc *sc = hw->priv;

		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);
		}

drivers/net/wireless/ath9k/core.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -784,4 +784,12 @@ static inline int ath_pci_init(void) { return 0; };
		static inline void ath_pci_exit(void) {};
		#endif

		#ifdef CONFIG_ATHEROS_AR71XX
		int ath_ahb_init(void);
		void ath_ahb_exit(void);
		#else
		static inline int ath_ahb_init(void) { return 0; };
		static inline void ath_ahb_exit(void) {};
		#endif

		#endif /* CORE_H */

drivers/net/wireless/ath9k/main.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -2527,8 +2527,17 @@ static int __init ath9k_init(void)
		goto err_rate_unregister;
		}

		error = ath_ahb_init();
		if (error < 0) {
		error = -ENODEV;
		goto err_pci_exit;
		}

		return 0;

		err_pci_exit:
		ath_pci_exit();

		err_rate_unregister:
		ath_rate_control_unregister();
		err_out:
		@@ -2538,6 +2547,7 @@ module_init(ath9k_init);

		static void __exit ath9k_exit(void)
		{
		ath_ahb_exit();
		ath_pci_exit();
		ath_rate_control_unregister();
		printk(KERN_INFO "%s: Driver unloaded\n", dev_info);

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