package/mac80211/patches/406-ath9k-introduce-platform-driver-for-AHB-bus-support.patch

   1 From ace011bdb2676f594824c81a5a5b5089dc0c3e0b Mon Sep 17 00:00:00 2001
   2 From: Gabor Juhos <juhosg@openwrt.org>
   3 Date: Mon, 5 Jan 2009 11:03:17 +0100
   4 Subject: [PATCH v2 06/11] ath9k: introduce platform driver for AHB bus support
   5
   6 This patch adds the platform_driver itself, and modifies the main driver
   7 to register it.
   8
   9 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  10 Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
  11 ---
  12  drivers/net/wireless/ath9k/Makefile |    1 +
  13  drivers/net/wireless/ath9k/ahb.c    |  160 +++++++++++++++++++++++++++++++++++
  14  drivers/net/wireless/ath9k/core.h   |    8 ++
  15  drivers/net/wireless/ath9k/main.c   |   10 ++
  16  4 files changed, 179 insertions(+), 0 deletions(-)
  17
  18 --- a/drivers/net/wireless/ath9k/Makefile
  19 +++ b/drivers/net/wireless/ath9k/Makefile
  20 @@ -12,6 +12,7 @@ ath9k-y +=    hw.o \
  21                 rc.o
  22
  23  ath9k-$(CONFIG_PCI) += pci.o
  24 +ath9k-$(CONFIG_ATHEROS_AR71XX) += ahb.o
  25  ath9k-$(CONFIG_ATH9K_DEBUG) += debug.o
  26
  27  obj-$(CONFIG_ATH9K) += ath9k.o
  28 --- /dev/null
  29 +++ b/drivers/net/wireless/ath9k/ahb.c
  30 @@ -0,0 +1,160 @@
  31 +/*
  32 + * Copyright (c) 2008 Atheros Communications Inc.
  33 + * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
  34 + * Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
  35 + *
  36 + * Permission to use, copy, modify, and/or distribute this software for any
  37 + * purpose with or without fee is hereby granted, provided that the above
  38 + * copyright notice and this permission notice appear in all copies.
  39 + *
  40 + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  41 + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  42 + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  43 + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  44 + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  45 + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  46 + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  47 + */
  48 +
  49 +#include <linux/nl80211.h>
  50 +#include <linux/platform_device.h>
  51 +#include "core.h"
  52 +#include "reg.h"
  53 +#include "hw.h"
  54 +
  55 +/* return bus cachesize in 4B word units */
  56 +static void ath_ahb_read_cachesize(struct ath_softc *sc, int *csz)
  57 +{
  58 +       *csz = L1_CACHE_BYTES >> 2;
  59 +}
  60 +
  61 +static void ath_ahb_cleanup(struct ath_softc *sc)
  62 +{
  63 +       iounmap(sc->mem);
  64 +}
  65 +
  66 +static struct ath_bus_ops ath_ahb_bus_ops  = {
  67 +       .read_cachesize = ath_ahb_read_cachesize,
  68 +       .cleanup = ath_ahb_cleanup,
  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 +       int irq;
  78 +       int ret = 0;
  79 +       struct ath_hal *ah;
  80 +
  81 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  82 +       if (res == NULL) {
  83 +               dev_err(&pdev->dev, "no memory resource found\n");
  84 +               ret = -ENXIO;
  85 +               goto err_out;
  86 +       }
  87 +
  88 +       mem = ioremap_nocache(res->start, res->end - res->start + 1);
  89 +       if (mem == NULL) {
  90 +               dev_err(&pdev->dev, "ioremap failed\n");
  91 +               ret = -ENOMEM;
  92 +               goto err_out;
  93 +       }
  94 +
  95 +       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  96 +       if (res == NULL) {
  97 +               dev_err(&pdev->dev, "no IRQ resource found\n");
  98 +               ret = -ENXIO;
  99 +               goto err_iounmap;
 100 +       }
 101 +
 102 +       irq = res->start;
 103 +
 104 +       hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
 105 +       if (hw == NULL) {
 106 +               dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
 107 +               ret = -ENOMEM;
 108 +               goto err_iounmap;
 109 +       }
 110 +
 111 +       SET_IEEE80211_DEV(hw, &pdev->dev);
 112 +       platform_set_drvdata(pdev, hw);
 113 +
 114 +       sc = hw->priv;
 115 +       sc->hw = hw;
 116 +       sc->dev = &pdev->dev;
 117 +       sc->mem = mem;
 118 +       sc->bus_ops = &ath_ahb_bus_ops;
 119 +       sc->irq = irq;
 120 +
 121 +       ret = ath_attach(AR5416_AR9100_DEVID, sc);
 122 +       if (ret != 0) {
 123 +               dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
 124 +               ret = -ENODEV;
 125 +               goto err_free_hw;
 126 +       }
 127 +
 128 +       ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
 129 +       if (ret) {
 130 +               dev_err(&pdev->dev, "request_irq failed, err=%d\n", ret);
 131 +               ret = -EIO;
 132 +               goto err_detach;
 133 +       }
 134 +
 135 +       ah = sc->sc_ah;
 136 +       printk(KERN_INFO
 137 +              "%s: Atheros AR%s MAC/BB Rev:%x, "
 138 +              "AR%s RF Rev:%x, mem=0x%lx, irq=%d\n",
 139 +              wiphy_name(hw->wiphy),
 140 +              ath_mac_bb_name(ah->ah_macVersion),
 141 +              ah->ah_macRev,
 142 +              ath_rf_name((ah->ah_analog5GhzRev & AR_RADIO_SREV_MAJOR)),
 143 +              ah->ah_phyRev,
 144 +              (unsigned long)mem, irq);
 145 +
 146 +       return 0;
 147 +
 148 + err_detach:
 149 +       ath_detach(sc);
 150 + err_free_hw:
 151 +       ieee80211_free_hw(hw);
 152 +       platform_set_drvdata(pdev, NULL);
 153 + err_iounmap:
 154 +       iounmap(mem);
 155 + err_out:
 156 +       return ret;
 157 +}
 158 +
 159 +static int ath_ahb_remove(struct platform_device *pdev)
 160 +{
 161 +       struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 162 +
 163 +       if (hw) {
 164 +               struct ath_softc *sc = hw->priv;
 165 +
 166 +               ath_cleanup(sc);
 167 +               platform_set_drvdata(pdev, NULL);
 168 +       }
 169 +
 170 +       return 0;
 171 +}
 172 +
 173 +static struct platform_driver ath_ahb_driver = {
 174 +       .probe      = ath_ahb_probe,
 175 +       .remove     = ath_ahb_remove,
 176 +       .driver         = {
 177 +               .name   = "ath9k",
 178 +               .owner  = THIS_MODULE,
 179 +       },
 180 +};
 181 +
 182 +int ath_ahb_init(void)
 183 +{
 184 +       return platform_driver_register(&ath_ahb_driver);
 185 +}
 186 +
 187 +void ath_ahb_exit(void)
 188 +{
 189 +       platform_driver_unregister(&ath_ahb_driver);
 190 +}
 191 --- a/drivers/net/wireless/ath9k/core.h
 192 +++ b/drivers/net/wireless/ath9k/core.h
 193 @@ -784,4 +784,12 @@ static inline int ath_pci_init(void) { r
 194  static inline void ath_pci_exit(void) {};
 195  #endif
 196
 197 +#ifdef CONFIG_ATHEROS_AR71XX
 198 +int ath_ahb_init(void);
 199 +void ath_ahb_exit(void);
 200 +#else
 201 +static inline int ath_ahb_init(void) { return 0; };
 202 +static inline void ath_ahb_exit(void) {};
 203 +#endif
 204 +
 205  #endif /* CORE_H */
 206 --- a/drivers/net/wireless/ath9k/main.c
 207 +++ b/drivers/net/wireless/ath9k/main.c
 208 @@ -2522,8 +2522,17 @@ static int __init ath9k_init(void)
 209                 goto err_rate_unregister;
 210         }
 211
 212 +       error = ath_ahb_init();
 213 +       if (error < 0) {
 214 +               error = -ENODEV;
 215 +               goto err_pci_exit;
 216 +       }
 217 +
 218         return 0;
 219
 220 + err_pci_exit:
 221 +       ath_pci_exit();
 222 +
 223   err_rate_unregister:
 224         ath_rate_control_unregister();
 225   err_out:
 226 @@ -2533,6 +2542,7 @@ module_init(ath9k_init);
 227
 228  static void __exit ath9k_exit(void)
 229  {
 230 +       ath_ahb_exit();
 231         ath_pci_exit();
 232         ath_rate_control_unregister();
 233         printk(KERN_INFO "%s: Driver unloaded\n", dev_info);