drivers/net/wireless/ath/ath9k/ahb.c

   1 /*
   2  * Copyright (c) 2008-2011 Atheros Communications Inc.
   3  * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
   4  * Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <linux/nl80211.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/module.h>
  22 #include "ath9k.h"
  23
  24 static const struct platform_device_id ath9k_platform_id_table[] = {
  25         {
  26                 .name = "ath9k",
  27                 .driver_data = AR5416_AR9100_DEVID,
  28         },
  29         {
  30                 .name = "ar933x_wmac",
  31                 .driver_data = AR9300_DEVID_AR9330,
  32         },
  33         {
  34                 .name = "ar934x_wmac",
  35                 .driver_data = AR9300_DEVID_AR9340,
  36         },
  37         {
  38                 .name = "qca955x_wmac",
  39                 .driver_data = AR9300_DEVID_QCA955X,
  40         },
  41         {
  42                 .name = "qca953x_wmac",
  43                 .driver_data = AR9300_DEVID_AR953X,
  44         },
  45         {
  46                 .name = "qca956x_wmac",
  47                 .driver_data = AR9300_DEVID_QCA956X,
  48         },
  49         {},
  50 };
  51
  52 /* return bus cachesize in 4B word units */
  53 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
  54 {
  55         *csz = L1_CACHE_BYTES >> 2;
  56 }
  57
  58 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
  59 {
  60         ath_err(common, "%s: eeprom data has to be provided externally\n",
  61                 __func__);
  62         return false;
  63 }
  64
  65 static const struct ath_bus_ops ath_ahb_bus_ops  = {
  66         .ath_bus_type = ATH_AHB,
  67         .read_cachesize = ath_ahb_read_cachesize,
  68         .eeprom_read = ath_ahb_eeprom_read,
  69 };
  70
  71 static int ath_ahb_probe(struct platform_device *pdev)
  72 {
  73         void __iomem *mem;
  74         struct ath_softc *sc;
  75         struct ieee80211_hw *hw;
  76         struct resource *res;
  77         const struct platform_device_id *id = platform_get_device_id(pdev);
  78         int irq;
  79         int ret = 0;
  80         struct ath_hw *ah;
  81         char hw_name[64];
  82
  83         if (!dev_get_platdata(&pdev->dev)) {
  84                 dev_err(&pdev->dev, "no platform data specified\n");
  85                 return -EINVAL;
  86         }
  87
  88         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  89         if (res == NULL) {
  90                 dev_err(&pdev->dev, "no memory resource found\n");
  91                 return -ENXIO;
  92         }
  93
  94         mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res));
  95         if (mem == NULL) {
  96                 dev_err(&pdev->dev, "ioremap failed\n");
  97                 return -ENOMEM;
  98         }
  99
 100         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 101         if (res == NULL) {
 102                 dev_err(&pdev->dev, "no IRQ resource found\n");
 103                 return -ENXIO;
 104         }
 105
 106         irq = res->start;
 107
 108         ath9k_fill_chanctx_ops();
 109         hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
 110         if (hw == NULL) {
 111                 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
 112                 return -ENOMEM;
 113         }
 114
 115         SET_IEEE80211_DEV(hw, &pdev->dev);
 116         platform_set_drvdata(pdev, hw);
 117
 118         sc = hw->priv;
 119         sc->hw = hw;
 120         sc->dev = &pdev->dev;
 121         sc->mem = mem;
 122         sc->irq = irq;
 123
 124         ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
 125         if (ret) {
 126                 dev_err(&pdev->dev, "request_irq failed\n");
 127                 goto err_free_hw;
 128         }
 129
 130         ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
 131         if (ret) {
 132                 dev_err(&pdev->dev, "failed to initialize device\n");
 133                 goto err_irq;
 134         }
 135
 136         ah = sc->sc_ah;
 137         ath9k_hw_name(ah, hw_name, sizeof(hw_name));
 138         wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
 139                    hw_name, (unsigned long)mem, irq);
 140
 141         return 0;
 142
 143  err_irq:
 144         free_irq(irq, sc);
 145  err_free_hw:
 146         ieee80211_free_hw(hw);
 147         return ret;
 148 }
 149
 150 static int ath_ahb_remove(struct platform_device *pdev)
 151 {
 152         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 153
 154         if (hw) {
 155                 struct ath_softc *sc = hw->priv;
 156
 157                 ath9k_deinit_device(sc);
 158                 free_irq(sc->irq, sc);
 159                 ieee80211_free_hw(sc->hw);
 160         }
 161
 162         return 0;
 163 }
 164
 165 static struct platform_driver ath_ahb_driver = {
 166         .probe      = ath_ahb_probe,
 167         .remove     = ath_ahb_remove,
 168         .driver         = {
 169                 .name   = "ath9k",
 170         },
 171         .id_table    = ath9k_platform_id_table,
 172 };
 173
 174 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
 175
 176 int ath_ahb_init(void)
 177 {
 178         return platform_driver_register(&ath_ahb_driver);
 179 }
 180
 181 void ath_ahb_exit(void)
 182 {
 183         platform_driver_unregister(&ath_ahb_driver);
 184 }