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[] __devinitconst = {
  49         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
  50         {}
  51 };
  52 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
  53
  54 static void wl1271_sdio_set_block_size(struct wl1271 *wl, unsigned int blksz)
  55 {
  56         sdio_claim_host(wl->if_priv);
  57         sdio_set_block_size(wl->if_priv, blksz);
  58         sdio_release_host(wl->if_priv);
  59 }
  60
  61 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
  62 {
  63         return wl->if_priv;
  64 }
  65
  66 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
  67 {
  68         return &(wl_to_func(wl)->dev);
  69 }
  70
  71 static irqreturn_t wl1271_hardirq(int irq, void *cookie)
  72 {
  73         struct wl1271 *wl = cookie;
  74         unsigned long flags;
  75
  76         wl1271_debug(DEBUG_IRQ, "IRQ");
  77
  78         /* complete the ELP completion */
  79         spin_lock_irqsave(&wl->wl_lock, flags);
  80         set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
  81         if (wl->elp_compl) {
  82                 complete(wl->elp_compl);
  83                 wl->elp_compl = NULL;
  84         }
  85
  86         if (test_bit(WL1271_FLAG_SUSPENDED, &wl->flags)) {
  87                 /* don't enqueue a work right now. mark it as pending */
  88                 set_bit(WL1271_FLAG_PENDING_WORK, &wl->flags);
  89                 wl1271_debug(DEBUG_IRQ, "should not enqueue work");
  90                 disable_irq_nosync(wl->irq);
  91                 pm_wakeup_event(wl1271_sdio_wl_to_dev(wl), 0);
  92                 spin_unlock_irqrestore(&wl->wl_lock, flags);
  93                 return IRQ_HANDLED;
  94         }
  95         spin_unlock_irqrestore(&wl->wl_lock, flags);
  96
  97         return IRQ_WAKE_THREAD;
  98 }
  99
 100 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
 101 {
 102         disable_irq(wl->irq);
 103 }
 104
 105 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
 106 {
 107         enable_irq(wl->irq);
 108 }
 109
 110 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
 111                                  size_t len, bool fixed)
 112 {
 113         int ret;
 114         struct sdio_func *func = wl_to_func(wl);
 115
 116         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 117                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
 118                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
 119                              addr, ((u8 *)buf)[0]);
 120         } else {
 121                 if (fixed)
 122                         ret = sdio_readsb(func, buf, addr, len);
 123                 else
 124                         ret = sdio_memcpy_fromio(func, buf, addr, len);
 125
 126                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
 127                              addr, len);
 128                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 129         }
 130
 131         if (ret)
 132                 wl1271_error("sdio read failed (%d)", ret);
 133 }
 134
 135 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 136                                   size_t len, bool fixed)
 137 {
 138         int ret;
 139         struct sdio_func *func = wl_to_func(wl);
 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         if (ret)
 157                 wl1271_error("sdio write failed (%d)", ret);
 158 }
 159
 160 static int wl1271_sdio_power_on(struct wl1271 *wl)
 161 {
 162         struct sdio_func *func = wl_to_func(wl);
 163         int ret;
 164
 165         /* Make sure the card will not be powered off by runtime PM */
 166         ret = pm_runtime_get_sync(&func->dev);
 167         if (ret < 0)
 168                 goto out;
 169
 170         /* Runtime PM might be disabled, so power up the card manually */
 171         ret = mmc_power_restore_host(func->card->host);
 172         if (ret < 0)
 173                 goto out;
 174
 175         sdio_claim_host(func);
 176         sdio_enable_func(func);
 177
 178 out:
 179         return ret;
 180 }
 181
 182 static int wl1271_sdio_power_off(struct wl1271 *wl)
 183 {
 184         struct sdio_func *func = wl_to_func(wl);
 185         int ret;
 186
 187         sdio_disable_func(func);
 188         sdio_release_host(func);
 189
 190         /* Runtime PM might be disabled, so power off the card manually */
 191         ret = mmc_power_save_host(func->card->host);
 192         if (ret < 0)
 193                 return ret;
 194
 195         /* Let runtime PM know the card is powered off */
 196         return pm_runtime_put_sync(&func->dev);
 197 }
 198
 199 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 200 {
 201         if (enable)
 202                 return wl1271_sdio_power_on(wl);
 203         else
 204                 return wl1271_sdio_power_off(wl);
 205 }
 206
 207 static struct wl1271_if_operations sdio_ops = {
 208         .read           = wl1271_sdio_raw_read,
 209         .write          = wl1271_sdio_raw_write,
 210         .power          = wl1271_sdio_set_power,
 211         .dev            = wl1271_sdio_wl_to_dev,
 212         .enable_irq     = wl1271_sdio_enable_interrupts,
 213         .disable_irq    = wl1271_sdio_disable_interrupts,
 214         .set_block_size = wl1271_sdio_set_block_size,
 215 };
 216
 217 static int __devinit wl1271_probe(struct sdio_func *func,
 218                                   const struct sdio_device_id *id)
 219 {
 220         struct ieee80211_hw *hw;
 221         const struct wl12xx_platform_data *wlan_data;
 222         struct wl1271 *wl;
 223         unsigned long irqflags;
 224         mmc_pm_flag_t mmcflags;
 225         int ret;
 226
 227         /* We are only able to handle the wlan function */
 228         if (func->num != 0x02)
 229                 return -ENODEV;
 230
 231         hw = wl1271_alloc_hw();
 232         if (IS_ERR(hw))
 233                 return PTR_ERR(hw);
 234
 235         wl = hw->priv;
 236
 237         wl->if_priv = func;
 238         wl->if_ops = &sdio_ops;
 239
 240         /* Grab access to FN0 for ELP reg. */
 241         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 242
 243         /* Use block mode for transferring over one block size of data */
 244         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
 245
 246         wlan_data = wl12xx_get_platform_data();
 247         if (IS_ERR(wlan_data)) {
 248                 ret = PTR_ERR(wlan_data);
 249                 wl1271_error("missing wlan platform data: %d", ret);
 250                 goto out_free;
 251         }
 252
 253         wl->irq = wlan_data->irq;
 254         wl->ref_clock = wlan_data->board_ref_clock;
 255         wl->tcxo_clock = wlan_data->board_tcxo_clock;
 256         wl->platform_quirks = wlan_data->platform_quirks;
 257
 258         if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
 259                 irqflags = IRQF_TRIGGER_RISING;
 260         else
 261                 irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
 262
 263         ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
 264                                    irqflags,
 265                                    DRIVER_NAME, wl);
 266         if (ret < 0) {
 267                 wl1271_error("request_irq() failed: %d", ret);
 268                 goto out_free;
 269         }
 270
 271         enable_irq_wake(wl->irq);
 272         device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
 273
 274         disable_irq(wl->irq);
 275
 276         /* if sdio can keep power while host is suspended, enable wow */
 277         mmcflags = sdio_get_host_pm_caps(func);
 278         wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
 279
 280         if (mmcflags & MMC_PM_KEEP_POWER)
 281                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
 282
 283         ret = wl1271_init_ieee80211(wl);
 284         if (ret)
 285                 goto out_irq;
 286
 287         ret = wl1271_register_hw(wl);
 288         if (ret)
 289                 goto out_irq;
 290
 291         sdio_set_drvdata(func, wl);
 292
 293         /* Tell PM core that we don't need the card to be powered now */
 294         pm_runtime_put_noidle(&func->dev);
 295
 296         return 0;
 297
 298  out_irq:
 299         free_irq(wl->irq, wl);
 300
 301  out_free:
 302         wl1271_free_hw(wl);
 303
 304         return ret;
 305 }
 306
 307 static void __devexit wl1271_remove(struct sdio_func *func)
 308 {
 309         struct wl1271 *wl = sdio_get_drvdata(func);
 310
 311         /* Undo decrement done above in wl1271_probe */
 312         pm_runtime_get_noresume(&func->dev);
 313
 314         wl1271_unregister_hw(wl);
 315         device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
 316         disable_irq_wake(wl->irq);
 317         free_irq(wl->irq, wl);
 318         wl1271_free_hw(wl);
 319 }
 320
 321 #ifdef CONFIG_PM
 322 static int wl1271_suspend(struct device *dev)
 323 {
 324         /* Tell MMC/SDIO core it's OK to power down the card
 325          * (if it isn't already), but not to remove it completely */
 326         struct sdio_func *func = dev_to_sdio_func(dev);
 327         struct wl1271 *wl = sdio_get_drvdata(func);
 328         mmc_pm_flag_t sdio_flags;
 329         int ret = 0;
 330
 331         wl1271_debug(DEBUG_MAC80211, "wl1271 suspend. wow_enabled: %d",
 332                      wl->wow_enabled);
 333
 334         /* check whether sdio should keep power */
 335         if (wl->wow_enabled) {
 336                 sdio_flags = sdio_get_host_pm_caps(func);
 337
 338                 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
 339                         wl1271_error("can't keep power while host "
 340                                      "is suspended");
 341                         ret = -EINVAL;
 342                         goto out;
 343                 }
 344
 345                 /* keep power while host suspended */
 346                 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
 347                 if (ret) {
 348                         wl1271_error("error while trying to keep power");
 349                         goto out;
 350                 }
 351
 352                 /* release host */
 353                 sdio_release_host(func);
 354         }
 355 out:
 356         return ret;
 357 }
 358
 359 static int wl1271_resume(struct device *dev)
 360 {
 361         struct sdio_func *func = dev_to_sdio_func(dev);
 362         struct wl1271 *wl = sdio_get_drvdata(func);
 363
 364         wl1271_debug(DEBUG_MAC80211, "wl1271 resume");
 365         if (wl->wow_enabled) {
 366                 /* claim back host */
 367                 sdio_claim_host(func);
 368         }
 369
 370         return 0;
 371 }
 372
 373 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
 374         .suspend        = wl1271_suspend,
 375         .resume         = wl1271_resume,
 376 };
 377 #endif
 378
 379 static struct sdio_driver wl1271_sdio_driver = {
 380         .name           = "wl1271_sdio",
 381         .id_table       = wl1271_devices,
 382         .probe          = wl1271_probe,
 383         .remove         = __devexit_p(wl1271_remove),
 384 #ifdef CONFIG_PM
 385         .drv = {
 386                 .pm = &wl1271_sdio_pm_ops,
 387         },
 388 #endif
 389 };
 390
 391 static int __init wl1271_init(void)
 392 {
 393         return sdio_register_driver(&wl1271_sdio_driver);
 394 }
 395
 396 static void __exit wl1271_exit(void)
 397 {
 398         sdio_unregister_driver(&wl1271_sdio_driver);
 399 }
 400
 401 module_init(wl1271_init);
 402 module_exit(wl1271_exit);
 403
 404 MODULE_LICENSE("GPL");
 405 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
 406 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 407 MODULE_FIRMWARE(WL1271_FW_NAME);
 408 MODULE_FIRMWARE(WL128X_FW_NAME);
 409 MODULE_FIRMWARE(WL127X_AP_FW_NAME);
 410 MODULE_FIRMWARE(WL128X_AP_FW_NAME);