drivers/net/wireless/wl12xx/wl1271_sdio.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2009-2010 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/irq.h>
  25 #include <linux/module.h>
  26 #include <linux/crc7.h>
  27 #include <linux/vmalloc.h>
  28 #include <linux/mmc/sdio_func.h>
  29 #include <linux/mmc/sdio_ids.h>
  30 #include <linux/mmc/card.h>
  31 #include <linux/gpio.h>
  32
  33 #include "wl1271.h"
  34 #include "wl12xx_80211.h"
  35 #include "wl1271_io.h"
  36
  37
  38 #define RX71_WL1271_IRQ_GPIO            42
  39
  40 #ifndef SDIO_VENDOR_ID_TI
  41 #define SDIO_VENDOR_ID_TI               0x0097
  42 #endif
  43
  44 #ifndef SDIO_DEVICE_ID_TI_WL1271
  45 #define SDIO_DEVICE_ID_TI_WL1271        0x4076
  46 #endif
  47
  48 static const struct sdio_device_id wl1271_devices[] = {
  49         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
  50         {}
  51 };
  52 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
  53
  54 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
  55 {
  56         return wl->if_priv;
  57 }
  58
  59 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
  60 {
  61         return &(wl_to_func(wl)->dev);
  62 }
  63
  64 static irqreturn_t wl1271_irq(int irq, void *cookie)
  65 {
  66         struct wl1271 *wl = cookie;
  67         unsigned long flags;
  68
  69         wl1271_debug(DEBUG_IRQ, "IRQ");
  70
  71         /* complete the ELP completion */
  72         spin_lock_irqsave(&wl->wl_lock, flags);
  73         if (wl->elp_compl) {
  74                 complete(wl->elp_compl);
  75                 wl->elp_compl = NULL;
  76         }
  77
  78         if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
  79                 ieee80211_queue_work(wl->hw, &wl->irq_work);
  80         set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags);
  81         spin_unlock_irqrestore(&wl->wl_lock, flags);
  82
  83         return IRQ_HANDLED;
  84 }
  85
  86 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
  87 {
  88         disable_irq(wl->irq);
  89 }
  90
  91 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
  92 {
  93         enable_irq(wl->irq);
  94 }
  95
  96 static void wl1271_sdio_reset(struct wl1271 *wl)
  97 {
  98 }
  99
 100 static void wl1271_sdio_init(struct wl1271 *wl)
 101 {
 102 }
 103
 104 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
 105                                  size_t len, bool fixed)
 106 {
 107         int ret;
 108         struct sdio_func *func = wl_to_func(wl);
 109
 110         sdio_claim_host(func);
 111
 112         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 113                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
 114                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
 115                              addr, ((u8 *)buf)[0]);
 116         } else {
 117                 if (fixed)
 118                         ret = sdio_readsb(func, buf, addr, len);
 119                 else
 120                         ret = sdio_memcpy_fromio(func, buf, addr, len);
 121
 122                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
 123                              addr, len);
 124                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 125         }
 126
 127         sdio_release_host(func);
 128
 129         if (ret)
 130                 wl1271_error("sdio read failed (%d)", ret);
 131 }
 132
 133 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 134                                   size_t len, bool fixed)
 135 {
 136         int ret;
 137         struct sdio_func *func = wl_to_func(wl);
 138
 139         sdio_claim_host(func);
 140
 141         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 142                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
 143                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
 144                              addr, ((u8 *)buf)[0]);
 145         } else {
 146                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
 147                              addr, len);
 148                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 149
 150                 if (fixed)
 151                         ret = sdio_writesb(func, addr, buf, len);
 152                 else
 153                         ret = sdio_memcpy_toio(func, addr, buf, len);
 154         }
 155
 156         sdio_release_host(func);
 157
 158         if (ret)
 159                 wl1271_error("sdio write failed (%d)", ret);
 160 }
 161
 162 static int wl1271_sdio_power_on(struct wl1271 *wl)
 163 {
 164         struct sdio_func *func = wl_to_func(wl);
 165
 166         sdio_claim_host(func);
 167         sdio_enable_func(func);
 168         sdio_release_host(func);
 169
 170         return 0;
 171 }
 172
 173 static int wl1271_sdio_power_off(struct wl1271 *wl)
 174 {
 175         struct sdio_func *func = wl_to_func(wl);
 176
 177         sdio_claim_host(func);
 178         sdio_disable_func(func);
 179         sdio_release_host(func);
 180
 181         return 0;
 182 }
 183
 184 static void wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 185 {
 186         struct sdio_func *func = wl_to_func(wl);
 187
 188         /* Let the SDIO stack handle wlan_enable control, so we
 189          * keep host claimed while wlan is in use to keep wl1271
 190          * alive.
 191          */
 192         if (enable)
 193                 return wl1271_sdio_power_on(wl);
 194         else
 195                 return wl1271_sdio_power_off(wl);
 196
 197 }
 198
 199 static struct wl1271_if_operations sdio_ops = {
 200         .read           = wl1271_sdio_raw_read,
 201         .write          = wl1271_sdio_raw_write,
 202         .reset          = wl1271_sdio_reset,
 203         .init           = wl1271_sdio_init,
 204         .power          = wl1271_sdio_set_power,
 205         .dev            = wl1271_sdio_wl_to_dev,
 206         .enable_irq     = wl1271_sdio_enable_interrupts,
 207         .disable_irq    = wl1271_sdio_disable_interrupts
 208 };
 209
 210 static int __devinit wl1271_probe(struct sdio_func *func,
 211                                   const struct sdio_device_id *id)
 212 {
 213         struct ieee80211_hw *hw;
 214         struct wl1271 *wl;
 215         int ret;
 216
 217         /* We are only able to handle the wlan function */
 218         if (func->num != 0x02)
 219                 return -ENODEV;
 220
 221         hw = wl1271_alloc_hw();
 222         if (IS_ERR(hw))
 223                 return PTR_ERR(hw);
 224
 225         wl = hw->priv;
 226
 227         wl->if_priv = func;
 228         wl->if_ops = &sdio_ops;
 229
 230         /* Grab access to FN0 for ELP reg. */
 231         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 232
 233         wl->irq = gpio_to_irq(RX71_WL1271_IRQ_GPIO);
 234         if (wl->irq < 0) {
 235                 ret = wl->irq;
 236                 wl1271_error("could not get irq!");
 237                 goto out_free;
 238         }
 239
 240         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
 241         if (ret < 0) {
 242                 wl1271_error("request_irq() failed: %d", ret);
 243                 goto out_free;
 244         }
 245
 246         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
 247
 248         disable_irq(wl->irq);
 249
 250         ret = wl1271_init_ieee80211(wl);
 251         if (ret)
 252                 goto out_irq;
 253
 254         ret = wl1271_register_hw(wl);
 255         if (ret)
 256                 goto out_irq;
 257
 258         sdio_set_drvdata(func, wl);
 259
 260         wl1271_notice("initialized");
 261
 262         return 0;
 263
 264  out_irq:
 265         free_irq(wl->irq, wl);
 266
 267
 268  out_free:
 269         wl1271_free_hw(wl);
 270
 271         return ret;
 272 }
 273
 274 static void __devexit wl1271_remove(struct sdio_func *func)
 275 {
 276         struct wl1271 *wl = sdio_get_drvdata(func);
 277
 278         free_irq(wl->irq, wl);
 279
 280         wl1271_unregister_hw(wl);
 281         wl1271_free_hw(wl);
 282 }
 283
 284 static struct sdio_driver wl1271_sdio_driver = {
 285         .name           = "wl1271_sdio",
 286         .id_table       = wl1271_devices,
 287         .probe          = wl1271_probe,
 288         .remove         = __devexit_p(wl1271_remove),
 289 };
 290
 291 static int __init wl1271_init(void)
 292 {
 293         int ret;
 294
 295         ret = sdio_register_driver(&wl1271_sdio_driver);
 296         if (ret < 0) {
 297                 wl1271_error("failed to register sdio driver: %d", ret);
 298                 goto out;
 299         }
 300
 301 out:
 302         return ret;
 303 }
 304
 305 static void __exit wl1271_exit(void)
 306 {
 307         sdio_unregister_driver(&wl1271_sdio_driver);
 308
 309         wl1271_notice("unloaded");
 310 }
 311
 312 module_init(wl1271_init);
 313 module_exit(wl1271_exit);
 314
 315 MODULE_LICENSE("GPL");
 316 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
 317 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 318 MODULE_FIRMWARE(WL1271_FW_NAME);