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

   1 From 9b3c1b50a35455e28c5b2fede615a304df42e758 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 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    |  179 +++++++++++++++++++++++++++++++++++
  14  drivers/net/wireless/ath9k/core.h   |    9 ++
  15  drivers/net/wireless/ath9k/main.c   |   10 ++
  16  4 files changed, 199 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 +1,179 @@
  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 +       struct ieee80211_hw *hw = sc->hw;
  64 +
  65 +       free_irq(sc->irq, sc);
  66 +
  67 +       ath_detach(sc);
  68 +       iounmap(sc->mem);
  69 +       ieee80211_free_hw(hw);
  70 +}
  71 +
  72 +static struct ath_bus_ops ath_ahb_bus_ops  = {
  73 +       .read_cachesize = ath_ahb_read_cachesize,
  74 +       .cleanup = ath_ahb_cleanup,
  75 +};
  76 +
  77 +static int ath_ahb_probe(struct platform_device *pdev)
  78 +{
  79 +       void __iomem *mem;
  80 +       struct ath_softc *sc;
  81 +       struct ieee80211_hw *hw;
  82 +       struct resource *res;
  83 +       int irq;
  84 +       int ret = 0;
  85 +       struct ath_hal *ah;
  86 +
  87 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  88 +       if (res == NULL) {
  89 +               dev_err(&pdev->dev, "no memory resource found\n");
  90 +               ret = -ENXIO;
  91 +               goto err_out;
  92 +       }
  93 +
  94 +       mem = ioremap_nocache(res->start, res->end - res->start + 1);
  95 +       if (mem == NULL) {
  96 +               dev_err(&pdev->dev, "ioremap failed\n");
  97 +               ret = -ENOMEM;
  98 +               goto err_out;
  99 +       }
 100 +
 101 +       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 102 +       if (res == NULL) {
 103 +               dev_err(&pdev->dev, "no IRQ resource found\n");
 104 +               ret = -ENXIO;
 105 +               goto err_iounmap;
 106 +       }
 107 +
 108 +       irq = res->start;
 109 +
 110 +       hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
 111 +       if (hw == NULL) {
 112 +               dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
 113 +               ret = -ENOMEM;
 114 +               goto err_iounmap;
 115 +       }
 116 +
 117 +       hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
 118 +               IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
 119 +               IEEE80211_HW_SIGNAL_DBM |
 120 +               IEEE80211_HW_NOISE_DBM;
 121 +
 122 +       hw->wiphy->interface_modes =
 123 +               BIT(NL80211_IFTYPE_AP) |
 124 +               BIT(NL80211_IFTYPE_STATION) |
 125 +               BIT(NL80211_IFTYPE_ADHOC);
 126 +
 127 +       SET_IEEE80211_DEV(hw, &pdev->dev);
 128 +       platform_set_drvdata(pdev, hw);
 129 +
 130 +       sc = hw->priv;
 131 +       sc->hw = hw;
 132 +       sc->dev = &pdev->dev;
 133 +       sc->mem = mem;
 134 +       sc->bus_ops = &ath_ahb_bus_ops;
 135 +       sc->irq = irq;
 136 +
 137 +       ret = ath_attach(AR5416_AR9100_DEVID, sc);
 138 +       if (ret != 0) {
 139 +               dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
 140 +               ret = -ENODEV;
 141 +               goto err_free_hw;
 142 +       }
 143 +
 144 +       ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
 145 +       if (ret) {
 146 +               dev_err(&pdev->dev, "request_irq failed, err=%d\n", ret);
 147 +               ret = -EIO;
 148 +               goto err_detach;
 149 +       }
 150 +
 151 +       ah = sc->sc_ah;
 152 +       printk(KERN_INFO
 153 +              "%s: Atheros AR%s MAC/BB Rev:%x, "
 154 +              "AR%s RF Rev:%x, mem=0x%lx, irq=%d\n",
 155 +              wiphy_name(hw->wiphy),
 156 +              ath_mac_bb_name(ah->ah_macVersion),
 157 +              ah->ah_macRev,
 158 +              ath_rf_name((ah->ah_analog5GhzRev & AR_RADIO_SREV_MAJOR)),
 159 +              ah->ah_phyRev,
 160 +              (unsigned long)mem, irq);
 161 +
 162 +       return 0;
 163 +
 164 + err_detach:
 165 +       ath_detach(sc);
 166 + err_free_hw:
 167 +       ieee80211_free_hw(hw);
 168 +       platform_set_drvdata(pdev, NULL);
 169 + err_iounmap:
 170 +       iounmap(mem);
 171 + err_out:
 172 +       return ret;
 173 +}
 174 +
 175 +static int ath_ahb_remove(struct platform_device *pdev)
 176 +{
 177 +       struct ieee80211_hw *hw = platform_get_drvdata(pdev);
 178 +
 179 +       if (hw) {
 180 +               struct ath_softc *sc = hw->priv;
 181 +
 182 +               free_irq(sc->irq, sc);
 183 +               ath_detach(sc);
 184 +               iounmap(sc->mem);
 185 +               ieee80211_free_hw(hw);
 186 +               platform_set_drvdata(pdev, NULL);
 187 +       }
 188 +
 189 +       return 0;
 190 +}
 191 +
 192 +static struct platform_driver ath_ahb_driver = {
 193 +       .probe      = ath_ahb_probe,
 194 +       .remove     = ath_ahb_remove,
 195 +       .driver         = {
 196 +               .name   = "ath9k",
 197 +               .owner  = THIS_MODULE,
 198 +       },
 199 +};
 200 +
 201 +int ath_ahb_init(void)
 202 +{
 203 +       return platform_driver_register(&ath_ahb_driver);
 204 +}
 205 +
 206 +void ath_ahb_exit(void)
 207 +{
 208 +       platform_driver_register(&ath_ahb_driver);
 209 +}
 210 --- a/drivers/net/wireless/ath9k/core.h
 211 +++ b/drivers/net/wireless/ath9k/core.h
 212 @@ -705,6 +705,7 @@ struct ath_softc {
 213         struct tasklet_struct bcon_tasklet;
 214         struct ath_hal *sc_ah;
 215         void __iomem *mem;
 216 +       int irq;
 217         spinlock_t sc_resetlock;
 218         struct mutex mutex;
 219
 220 @@ -782,4 +783,12 @@ static inline int ath_pci_init(void) { r
 221  static inline void ath_pci_exit(void) {};
 222  #endif
 223
 224 +#ifdef CONFIG_ATHEROS_AR71XX
 225 +int ath_ahb_init(void);
 226 +void ath_ahb_exit(void);
 227 +#else
 228 +static inline int ath_ahb_init(void) { return 0; };
 229 +static inline void ath_ahb_exit(void) {};
 230 +#endif
 231 +
 232  #endif /* CORE_H */
 233 --- a/drivers/net/wireless/ath9k/main.c
 234 +++ b/drivers/net/wireless/ath9k/main.c
 235 @@ -2514,8 +2514,17 @@ static int __init ath9k_init(void)
 236                 goto err_rate_unregister;
 237         }
 238
 239 +       error = ath_ahb_init();
 240 +       if (error < 0) {
 241 +               error = -ENODEV;
 242 +               goto err_pci_exit;
 243 +       }
 244 +
 245         return 0;
 246
 247 + err_pci_exit:
 248 +       ath_pci_exit();
 249 +
 250   err_rate_unregister:
 251         ath_rate_control_unregister();
 252   err_out:
 253 @@ -2525,6 +2534,7 @@ module_init(ath9k_init);
 254
 255  static void __exit ath9k_exit(void)
 256  {
 257 +       ath_ahb_exit();
 258         ath_pci_exit();
 259         ath_rate_control_unregister();
 260         printk(KERN_INFO "%s: Driver unloaded\n", dev_info);