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

   1 From 23f9e44a18b5a2dfaa1326aa30dd07e1449e8b5f 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 v3 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 Changes-licensed-under: ISC
  10
  11 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  12 Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
  13 ---
  14  drivers/net/wireless/ath9k/Makefile |    1 +
  15  drivers/net/wireless/ath9k/ahb.c    |  160 +++++++++++++++++++++++++++++++++++
  16  drivers/net/wireless/ath9k/core.h   |    8 ++
  17  drivers/net/wireless/ath9k/main.c   |   10 ++
  18  4 files changed, 179 insertions(+), 0 deletions(-)
  19  create mode 100644 drivers/net/wireless/ath9k/ahb.c
  20
  21 --- a/drivers/net/wireless/ath9k/Makefile
  22 +++ b/drivers/net/wireless/ath9k/Makefile
  23 @@ -12,6 +12,7 @@ ath9k-y +=    hw.o \
  24                 rc.o
  25
  26  ath9k-$(CONFIG_PCI) += pci.o
  27 +ath9k-$(CONFIG_ATHEROS_AR71XX) += ahb.o
  28  ath9k-$(CONFIG_ATH9K_DEBUG) += debug.o
  29
  30  obj-$(CONFIG_ATH9K) += ath9k.o
  31 --- /dev/null
  32 +++ b/drivers/net/wireless/ath9k/ahb.c
  33 @@ -0,0 +1,160 @@
  34 +/*
  35 + * Copyright (c) 2008 Atheros Communications Inc.
  36 + * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
  37 + * Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
  38 + *
  39 + * Permission to use, copy, modify, and/or distribute this software for any
  40 + * purpose with or without fee is hereby granted, provided that the above
  41 + * copyright notice and this permission notice appear in all copies.
  42 + *
  43 + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  44 + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  45 + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  46 + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  47 + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  48 + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  49 + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  50 + */
  51 +
  52 +#include <linux/nl80211.h>
  53 +#include <linux/platform_device.h>
  54 +#include "core.h"
  55 +#include "reg.h"
  56 +#include "hw.h"
  57 +
  58 +/* return bus cachesize in 4B word units */
  59 +static void ath_ahb_read_cachesize(struct ath_softc *sc, int *csz)
  60 +{
  61 +       *csz = L1_CACHE_BYTES >> 2;
  62 +}
  63 +
  64 +static void ath_ahb_cleanup(struct ath_softc *sc)
  65 +{
  66 +       iounmap(sc->mem);
  67 +}
  68 +
  69 +static struct ath_bus_ops ath_ahb_bus_ops  = {
  70 +       .read_cachesize = ath_ahb_read_cachesize,
  71 +       .cleanup = ath_ahb_cleanup,
  72 +};
  73 +
  74 +static int ath_ahb_probe(struct platform_device *pdev)
  75 +{
  76 +       void __iomem *mem;
  77 +       struct ath_softc *sc;
  78 +       struct ieee80211_hw *hw;
  79 +       struct resource *res;
  80 +       int irq;
  81 +       int ret = 0;
  82 +       struct ath_hal *ah;
  83 +
  84 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  85 +       if (res == NULL) {
  86 +               dev_err(&pdev->dev, "no memory resource found\n");
  87 +               ret = -ENXIO;
  88 +               goto err_out;
  89 +       }
  90 +
  91 +       mem = ioremap_nocache(res->start, res->end - res->start + 1);
  92 +       if (mem == NULL) {
  93 +               dev_err(&pdev->dev, "ioremap failed\n");
  94 +               ret = -ENOMEM;
  95 +               goto err_out;
  96 +       }
  97 +
  98 +       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  99 +       if (res == NULL) {
 100 +               dev_err(&pdev->dev, "no IRQ resource found\n");
 101 +               ret = -ENXIO;
 102 +               goto err_iounmap;
 103 +       }
 104 +
 105 +       irq = res->start;
 106 +
 107 +       hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
 108 +       if (hw == NULL) {
 109 +               dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
 110 +               ret = -ENOMEM;
 111 +               goto err_iounmap;
 112 +       }
 113 +
 114 +       SET_IEEE80211_DEV(hw, &pdev->dev);
 115 +       platform_set_drvdata(pdev, hw);
 116 +
 117 +       sc = hw->priv;
 118 +       sc->hw = hw;
 119 +       sc->dev = &pdev->dev;
 120 +       sc->mem = mem;
 121 +       sc->bus_ops = &ath_ahb_bus_ops;
 122 +       sc->irq = irq;
 123 +
 124 +       ret = ath_attach(AR5416_AR9100_DEVID, sc);
 125 +       if (ret != 0) {
 126 +               dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
 127 +               ret = -ENODEV;
 128 +               goto err_free_hw;
 129 +       }
 130 +
 131 +       ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
 132 +       if (ret) {
 133 +               dev_err(&pdev->dev, "request_irq failed, err=%d\n", ret);
 134 +               ret = -EIO;
 135 +               goto err_detach;
 136 +       }
 137 +
 138 +       ah = sc->sc_ah;
 139 +       printk(KERN_INFO
 140 +              "%s: Atheros AR%s MAC/BB Rev:%x, "
 141 +              "AR%s RF Rev:%x, mem=0x%lx, irq=%d\n",
 142 +              wiphy_name(hw->wiphy),
 143 +              ath_mac_bb_name(ah->ah_macVersion),
 144 +              ah->ah_macRev,
 145 +              ath_rf_name((ah->ah_analog5GhzRev & AR_RADIO_SREV_MAJOR)),
 146 +              ah->ah_phyRev,
 147 +              (unsigned long)mem, irq);
 148 +
 149 +       return 0;
 150 +
 151 + err_detach:
 152 +       ath_detach(sc);
 153 + err_free_hw:
 154 +       ieee80211_free_hw(hw);
 155 +       platform_set_drvdata(pdev, NULL);
 156 + err_iounmap:
 157 +       iounmap(mem);
 158 + err_out:
 159 +       return ret;
 160 +}
 161 +
 162 +static int ath_ahb_remove(struct platform_device *pdev)
 163 +{
 164 +       struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 165 +
 166 +       if (hw) {
 167 +               struct ath_softc *sc = hw->priv;
 168 +
 169 +               ath_cleanup(sc);
 170 +               platform_set_drvdata(pdev, NULL);
 171 +       }
 172 +
 173 +       return 0;
 174 +}
 175 +
 176 +static struct platform_driver ath_ahb_driver = {
 177 +       .probe      = ath_ahb_probe,
 178 +       .remove     = ath_ahb_remove,
 179 +       .driver         = {
 180 +               .name   = "ath9k",
 181 +               .owner  = THIS_MODULE,
 182 +       },
 183 +};
 184 +
 185 +int ath_ahb_init(void)
 186 +{
 187 +       return platform_driver_register(&ath_ahb_driver);
 188 +}
 189 +
 190 +void ath_ahb_exit(void)
 191 +{
 192 +       platform_driver_unregister(&ath_ahb_driver);
 193 +}
 194 --- a/drivers/net/wireless/ath9k/core.h
 195 +++ b/drivers/net/wireless/ath9k/core.h
 196 @@ -784,4 +784,12 @@ static inline int ath_pci_init(void) { r
 197  static inline void ath_pci_exit(void) {};
 198  #endif
 199
 200 +#ifdef CONFIG_ATHEROS_AR71XX
 201 +int ath_ahb_init(void);
 202 +void ath_ahb_exit(void);
 203 +#else
 204 +static inline int ath_ahb_init(void) { return 0; };
 205 +static inline void ath_ahb_exit(void) {};
 206 +#endif
 207 +
 208  #endif /* CORE_H */
 209 --- a/drivers/net/wireless/ath9k/main.c
 210 +++ b/drivers/net/wireless/ath9k/main.c
 211 @@ -2531,8 +2531,17 @@ static int __init ath9k_init(void)
 212                 goto err_rate_unregister;
 213         }
 214
 215 +       error = ath_ahb_init();
 216 +       if (error < 0) {
 217 +               error = -ENODEV;
 218 +               goto err_pci_exit;
 219 +       }
 220 +
 221         return 0;
 222
 223 + err_pci_exit:
 224 +       ath_pci_exit();
 225 +
 226   err_rate_unregister:
 227         ath_rate_control_unregister();
 228   err_out:
 229 @@ -2542,6 +2551,7 @@ module_init(ath9k_init);
 230
 231  static void __exit ath9k_exit(void)
 232  {
 233 +       ath_ahb_exit();
 234         ath_pci_exit();
 235         ath_rate_control_unregister();
 236         printk(KERN_INFO "%s: Driver unloaded\n", dev_info);