/*
   * 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
  ",
  			__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
  ");
  		return -EINVAL;
  	}
  
  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	if (res == NULL) {
  		dev_err(&pdev->dev, "no memory resource found
  ");
  		return -ENXIO;
  	}
  
  	mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res));
  	if (mem == NULL) {
  		dev_err(&pdev->dev, "ioremap failed
  ");
  		return -ENOMEM;
  	}
  
  	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  	if (res == NULL) {
  		dev_err(&pdev->dev, "no IRQ resource found
  ");
  		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
  ");
  		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
  ");
  		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
  ");
  		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
  ",
  		   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);
  }