drivers/net/wireless/wl12xx/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/mmc/host.h>
  32 #include <linux/gpio.h>
  33 #include <linux/wl12xx.h>
  34 #include <linux/pm_runtime.h>
  35
  36 #include "wl12xx.h"
  37 #include "wl12xx_80211.h"
  38 #include "io.h"
  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         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 111                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
 112                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
 113                              addr, ((u8 *)buf)[0]);
 114         } else {
 115                 if (fixed)
 116                         ret = sdio_readsb(func, buf, addr, len);
 117                 else
 118                         ret = sdio_memcpy_fromio(func, buf, addr, len);
 119
 120                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
 121                              addr, len);
 122                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 123         }
 124
 125         if (ret)
 126                 wl1271_error("sdio read failed (%d)", ret);
 127 }
 128
 129 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 130                                   size_t len, bool fixed)
 131 {
 132         int ret;
 133         struct sdio_func *func = wl_to_func(wl);
 134
 135         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 136                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
 137                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
 138                              addr, ((u8 *)buf)[0]);
 139         } else {
 140                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
 141                              addr, len);
 142                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 143
 144                 if (fixed)
 145                         ret = sdio_writesb(func, addr, buf, len);
 146                 else
 147                         ret = sdio_memcpy_toio(func, addr, buf, len);
 148         }
 149
 150         if (ret)
 151                 wl1271_error("sdio write failed (%d)", ret);
 152 }
 153
 154 static int wl1271_sdio_power_on(struct wl1271 *wl)
 155 {
 156         struct sdio_func *func = wl_to_func(wl);
 157         int ret;
 158
 159         /* Make sure the card will not be powered off by runtime PM */
 160         ret = pm_runtime_get_sync(&func->dev);
 161         if (ret < 0)
 162                 goto out;
 163
 164         /* Runtime PM might be disabled, so power up the card manually */
 165         ret = mmc_power_restore_host(func->card->host);
 166         if (ret < 0)
 167                 goto out;
 168
 169         sdio_claim_host(func);
 170         sdio_enable_func(func);
 171
 172 out:
 173         return ret;
 174 }
 175
 176 static int wl1271_sdio_power_off(struct wl1271 *wl)
 177 {
 178         struct sdio_func *func = wl_to_func(wl);
 179         int ret;
 180
 181         sdio_disable_func(func);
 182         sdio_release_host(func);
 183
 184         /* Runtime PM might be disabled, so power off the card manually */
 185         ret = mmc_power_save_host(func->card->host);
 186         if (ret < 0)
 187                 return ret;
 188
 189         /* Let runtime PM know the card is powered off */
 190         return pm_runtime_put_sync(&func->dev);
 191 }
 192
 193 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 194 {
 195         if (enable)
 196                 return wl1271_sdio_power_on(wl);
 197         else
 198                 return wl1271_sdio_power_off(wl);
 199 }
 200
 201 static struct wl1271_if_operations sdio_ops = {
 202         .read           = wl1271_sdio_raw_read,
 203         .write          = wl1271_sdio_raw_write,
 204         .reset          = wl1271_sdio_reset,
 205         .init           = wl1271_sdio_init,
 206         .power          = wl1271_sdio_set_power,
 207         .dev            = wl1271_sdio_wl_to_dev,
 208         .enable_irq     = wl1271_sdio_enable_interrupts,
 209         .disable_irq    = wl1271_sdio_disable_interrupts
 210 };
 211
 212 static int __devinit wl1271_probe(struct sdio_func *func,
 213                                   const struct sdio_device_id *id)
 214 {
 215         struct ieee80211_hw *hw;
 216         const struct wl12xx_platform_data *wlan_data;
 217         struct wl1271 *wl;
 218         int ret;
 219
 220         /* We are only able to handle the wlan function */
 221         if (func->num != 0x02)
 222                 return -ENODEV;
 223
 224         hw = wl1271_alloc_hw();
 225         if (IS_ERR(hw))
 226                 return PTR_ERR(hw);
 227
 228         wl = hw->priv;
 229
 230         wl->if_priv = func;
 231         wl->if_ops = &sdio_ops;
 232
 233         /* Grab access to FN0 for ELP reg. */
 234         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 235
 236         wlan_data = wl12xx_get_platform_data();
 237         if (IS_ERR(wlan_data)) {
 238                 ret = PTR_ERR(wlan_data);
 239                 wl1271_error("missing wlan platform data: %d", ret);
 240                 goto out_free;
 241         }
 242
 243         wl->irq = wlan_data->irq;
 244         wl->ref_clock = wlan_data->board_ref_clock;
 245
 246         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
 247         if (ret < 0) {
 248                 wl1271_error("request_irq() failed: %d", ret);
 249                 goto out_free;
 250         }
 251
 252         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
 253
 254         disable_irq(wl->irq);
 255
 256         ret = wl1271_init_ieee80211(wl);
 257         if (ret)
 258                 goto out_irq;
 259
 260         ret = wl1271_register_hw(wl);
 261         if (ret)
 262                 goto out_irq;
 263
 264         sdio_set_drvdata(func, wl);
 265
 266         /* Tell PM core that we don't need the card to be powered now */
 267         pm_runtime_put_noidle(&func->dev);
 268
 269         wl1271_notice("initialized");
 270
 271         return 0;
 272
 273  out_irq:
 274         free_irq(wl->irq, wl);
 275
 276
 277  out_free:
 278         wl1271_free_hw(wl);
 279
 280         return ret;
 281 }
 282
 283 static void __devexit wl1271_remove(struct sdio_func *func)
 284 {
 285         struct wl1271 *wl = sdio_get_drvdata(func);
 286
 287         /* Undo decrement done above in wl1271_probe */
 288         pm_runtime_get_noresume(&func->dev);
 289
 290         wl1271_unregister_hw(wl);
 291         free_irq(wl->irq, wl);
 292         wl1271_free_hw(wl);
 293 }
 294
 295 static int wl1271_suspend(struct device *dev)
 296 {
 297         /* Tell MMC/SDIO core it's OK to power down the card
 298          * (if it isn't already), but not to remove it completely */
 299         return 0;
 300 }
 301
 302 static int wl1271_resume(struct device *dev)
 303 {
 304         return 0;
 305 }
 306
 307 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
 308         .suspend        = wl1271_suspend,
 309         .resume         = wl1271_resume,
 310 };
 311
 312 static struct sdio_driver wl1271_sdio_driver = {
 313         .name           = "wl1271_sdio",
 314         .id_table       = wl1271_devices,
 315         .probe          = wl1271_probe,
 316         .remove         = __devexit_p(wl1271_remove),
 317         .drv = {
 318                 .pm = &wl1271_sdio_pm_ops,
 319         },
 320 };
 321
 322 static int __init wl1271_init(void)
 323 {
 324         int ret;
 325
 326         ret = sdio_register_driver(&wl1271_sdio_driver);
 327         if (ret < 0) {
 328                 wl1271_error("failed to register sdio driver: %d", ret);
 329                 goto out;
 330         }
 331
 332 out:
 333         return ret;
 334 }
 335
 336 static void __exit wl1271_exit(void)
 337 {
 338         sdio_unregister_driver(&wl1271_sdio_driver);
 339
 340         wl1271_notice("unloaded");
 341 }
 342
 343 module_init(wl1271_init);
 344 module_exit(wl1271_exit);
 345
 346 MODULE_LICENSE("GPL");
 347 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
 348 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 349 MODULE_FIRMWARE(WL1271_FW_NAME);
 350 MODULE_FIRMWARE(WL1271_AP_FW_NAME);