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/vmalloc.h>
  27 #include <linux/mmc/sdio_func.h>
  28 #include <linux/mmc/sdio_ids.h>
  29 #include <linux/mmc/card.h>
  30 #include <linux/mmc/host.h>
  31 #include <linux/gpio.h>
  32 #include <linux/wl12xx.h>
  33 #include <linux/pm_runtime.h>
  34
  35 #include "wl12xx.h"
  36 #include "wl12xx_80211.h"
  37 #include "io.h"
  38
  39 #ifndef SDIO_VENDOR_ID_TI
  40 #define SDIO_VENDOR_ID_TI               0x0097
  41 #endif
  42
  43 #ifndef SDIO_DEVICE_ID_TI_WL1271
  44 #define SDIO_DEVICE_ID_TI_WL1271        0x4076
  45 #endif
  46
  47 static const struct sdio_device_id wl1271_devices[] __devinitconst = {
  48         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
  49         {}
  50 };
  51 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
  52
  53 static void wl1271_sdio_set_block_size(struct wl1271 *wl, unsigned int blksz)
  54 {
  55         sdio_claim_host(wl->if_priv);
  56         sdio_set_block_size(wl->if_priv, blksz);
  57         sdio_release_host(wl->if_priv);
  58 }
  59
  60 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
  61 {
  62         return wl->if_priv;
  63 }
  64
  65 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
  66 {
  67         return &(wl_to_func(wl)->dev);
  68 }
  69
  70 static irqreturn_t wl1271_hardirq(int irq, void *cookie)
  71 {
  72         struct wl1271 *wl = cookie;
  73         unsigned long flags;
  74
  75         wl1271_debug(DEBUG_IRQ, "IRQ");
  76
  77         /* complete the ELP completion */
  78         spin_lock_irqsave(&wl->wl_lock, flags);
  79         set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
  80         if (wl->elp_compl) {
  81                 complete(wl->elp_compl);
  82                 wl->elp_compl = NULL;
  83         }
  84
  85         if (test_bit(WL1271_FLAG_SUSPENDED, &wl->flags)) {
  86                 /* don't enqueue a work right now. mark it as pending */
  87                 set_bit(WL1271_FLAG_PENDING_WORK, &wl->flags);
  88                 wl1271_debug(DEBUG_IRQ, "should not enqueue work");
  89                 disable_irq_nosync(wl->irq);
  90                 pm_wakeup_event(wl1271_sdio_wl_to_dev(wl), 0);
  91                 spin_unlock_irqrestore(&wl->wl_lock, flags);
  92                 return IRQ_HANDLED;
  93         }
  94         spin_unlock_irqrestore(&wl->wl_lock, flags);
  95
  96         return IRQ_WAKE_THREAD;
  97 }
  98
  99 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
 100 {
 101         disable_irq(wl->irq);
 102 }
 103
 104 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
 105 {
 106         enable_irq(wl->irq);
 107 }
 108
 109 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
 110                                  size_t len, bool fixed)
 111 {
 112         int ret;
 113         struct sdio_func *func = wl_to_func(wl);
 114
 115         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 116                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
 117                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
 118                              addr, ((u8 *)buf)[0]);
 119         } else {
 120                 if (fixed)
 121                         ret = sdio_readsb(func, buf, addr, len);
 122                 else
 123                         ret = sdio_memcpy_fromio(func, buf, addr, len);
 124
 125                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
 126                              addr, len);
 127                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 128         }
 129
 130         if (ret)
 131                 wl1271_error("sdio read failed (%d)", ret);
 132 }
 133
 134 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 135                                   size_t len, bool fixed)
 136 {
 137         int ret;
 138         struct sdio_func *func = wl_to_func(wl);
 139
 140         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 141                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
 142                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
 143                              addr, ((u8 *)buf)[0]);
 144         } else {
 145                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
 146                              addr, len);
 147                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 148
 149                 if (fixed)
 150                         ret = sdio_writesb(func, addr, buf, len);
 151                 else
 152                         ret = sdio_memcpy_toio(func, addr, buf, len);
 153         }
 154
 155         if (ret)
 156                 wl1271_error("sdio write failed (%d)", ret);
 157 }
 158
 159 static int wl1271_sdio_power_on(struct wl1271 *wl)
 160 {
 161         struct sdio_func *func = wl_to_func(wl);
 162         int ret;
 163
 164         /* If enabled, tell runtime PM not to power off the card */
 165         if (pm_runtime_enabled(&func->dev)) {
 166                 ret = pm_runtime_get_sync(&func->dev);
 167                 if (ret < 0)
 168                         goto out;
 169         } else {
 170                 /* Runtime PM is disabled: power up the card manually */
 171                 ret = mmc_power_restore_host(func->card->host);
 172                 if (ret < 0)
 173                         goto out;
 174         }
 175
 176         sdio_claim_host(func);
 177         sdio_enable_func(func);
 178
 179 out:
 180         return ret;
 181 }
 182
 183 static int wl1271_sdio_power_off(struct wl1271 *wl)
 184 {
 185         struct sdio_func *func = wl_to_func(wl);
 186         int ret;
 187
 188         sdio_disable_func(func);
 189         sdio_release_host(func);
 190
 191         /* Power off the card manually, even if runtime PM is enabled. */
 192         ret = mmc_power_save_host(func->card->host);
 193         if (ret < 0)
 194                 return ret;
 195
 196         /* If enabled, let runtime PM know the card is powered off */
 197         if (pm_runtime_enabled(&func->dev))
 198                 ret = pm_runtime_put_sync(&func->dev);
 199
 200         return ret;
 201 }
 202
 203 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 204 {
 205         if (enable)
 206                 return wl1271_sdio_power_on(wl);
 207         else
 208                 return wl1271_sdio_power_off(wl);
 209 }
 210
 211 static struct wl1271_if_operations sdio_ops = {
 212         .read           = wl1271_sdio_raw_read,
 213         .write          = wl1271_sdio_raw_write,
 214         .power          = wl1271_sdio_set_power,
 215         .dev            = wl1271_sdio_wl_to_dev,
 216         .enable_irq     = wl1271_sdio_enable_interrupts,
 217         .disable_irq    = wl1271_sdio_disable_interrupts,
 218         .set_block_size = wl1271_sdio_set_block_size,
 219 };
 220
 221 static int __devinit wl1271_probe(struct sdio_func *func,
 222                                   const struct sdio_device_id *id)
 223 {
 224         struct ieee80211_hw *hw;
 225         const struct wl12xx_platform_data *wlan_data;
 226         struct wl1271 *wl;
 227         unsigned long irqflags;
 228         mmc_pm_flag_t mmcflags;
 229         int ret;
 230
 231         /* We are only able to handle the wlan function */
 232         if (func->num != 0x02)
 233                 return -ENODEV;
 234
 235         hw = wl1271_alloc_hw();
 236         if (IS_ERR(hw))
 237                 return PTR_ERR(hw);
 238
 239         wl = hw->priv;
 240
 241         wl->if_priv = func;
 242         wl->if_ops = &sdio_ops;
 243
 244         /* Grab access to FN0 for ELP reg. */
 245         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 246
 247         /* Use block mode for transferring over one block size of data */
 248         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
 249
 250         wlan_data = wl12xx_get_platform_data();
 251         if (IS_ERR(wlan_data)) {
 252                 ret = PTR_ERR(wlan_data);
 253                 wl1271_error("missing wlan platform data: %d", ret);
 254                 goto out_free;
 255         }
 256
 257         wl->irq = wlan_data->irq;
 258         wl->ref_clock = wlan_data->board_ref_clock;
 259         wl->tcxo_clock = wlan_data->board_tcxo_clock;
 260         wl->platform_quirks = wlan_data->platform_quirks;
 261
 262         if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
 263                 irqflags = IRQF_TRIGGER_RISING;
 264         else
 265                 irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
 266
 267         ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
 268                                    irqflags,
 269                                    DRIVER_NAME, wl);
 270         if (ret < 0) {
 271                 wl1271_error("request_irq() failed: %d", ret);
 272                 goto out_free;
 273         }
 274
 275         ret = enable_irq_wake(wl->irq);
 276         if (!ret) {
 277                 wl->irq_wake_enabled = true;
 278                 device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
 279
 280                 /* if sdio can keep power while host is suspended, enable wow */
 281                 mmcflags = sdio_get_host_pm_caps(func);
 282                 wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
 283
 284                 if (mmcflags & MMC_PM_KEEP_POWER)
 285                         hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
 286         }
 287         disable_irq(wl->irq);
 288
 289         ret = wl1271_init_ieee80211(wl);
 290         if (ret)
 291                 goto out_irq;
 292
 293         ret = wl1271_register_hw(wl);
 294         if (ret)
 295                 goto out_irq;
 296
 297         sdio_set_drvdata(func, wl);
 298
 299         /* Tell PM core that we don't need the card to be powered now */
 300         pm_runtime_put_noidle(&func->dev);
 301
 302         return 0;
 303
 304  out_irq:
 305         free_irq(wl->irq, wl);
 306
 307  out_free:
 308         wl1271_free_hw(wl);
 309
 310         return ret;
 311 }
 312
 313 static void __devexit wl1271_remove(struct sdio_func *func)
 314 {
 315         struct wl1271 *wl = sdio_get_drvdata(func);
 316
 317         /* Undo decrement done above in wl1271_probe */
 318         pm_runtime_get_noresume(&func->dev);
 319
 320         wl1271_unregister_hw(wl);
 321         if (wl->irq_wake_enabled) {
 322                 device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
 323                 disable_irq_wake(wl->irq);
 324         }
 325         free_irq(wl->irq, wl);
 326         wl1271_free_hw(wl);
 327 }
 328
 329 #ifdef CONFIG_PM
 330 static int wl1271_suspend(struct device *dev)
 331 {
 332         /* Tell MMC/SDIO core it's OK to power down the card
 333          * (if it isn't already), but not to remove it completely */
 334         struct sdio_func *func = dev_to_sdio_func(dev);
 335         struct wl1271 *wl = sdio_get_drvdata(func);
 336         mmc_pm_flag_t sdio_flags;
 337         int ret = 0;
 338
 339         wl1271_debug(DEBUG_MAC80211, "wl1271 suspend. wow_enabled: %d",
 340                      wl->wow_enabled);
 341
 342         /* check whether sdio should keep power */
 343         if (wl->wow_enabled) {
 344                 sdio_flags = sdio_get_host_pm_caps(func);
 345
 346                 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
 347                         wl1271_error("can't keep power while host "
 348                                      "is suspended");
 349                         ret = -EINVAL;
 350                         goto out;
 351                 }
 352
 353                 /* keep power while host suspended */
 354                 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
 355                 if (ret) {
 356                         wl1271_error("error while trying to keep power");
 357                         goto out;
 358                 }
 359
 360                 /* release host */
 361                 sdio_release_host(func);
 362         }
 363 out:
 364         return ret;
 365 }
 366
 367 static int wl1271_resume(struct device *dev)
 368 {
 369         struct sdio_func *func = dev_to_sdio_func(dev);
 370         struct wl1271 *wl = sdio_get_drvdata(func);
 371
 372         wl1271_debug(DEBUG_MAC80211, "wl1271 resume");
 373         if (wl->wow_enabled) {
 374                 /* claim back host */
 375                 sdio_claim_host(func);
 376         }
 377
 378         return 0;
 379 }
 380
 381 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
 382         .suspend        = wl1271_suspend,
 383         .resume         = wl1271_resume,
 384 };
 385 #endif
 386
 387 static struct sdio_driver wl1271_sdio_driver = {
 388         .name           = "wl1271_sdio",
 389         .id_table       = wl1271_devices,
 390         .probe          = wl1271_probe,
 391         .remove         = __devexit_p(wl1271_remove),
 392 #ifdef CONFIG_PM
 393         .drv = {
 394                 .pm = &wl1271_sdio_pm_ops,
 395         },
 396 #endif
 397 };
 398
 399 static int __init wl1271_init(void)
 400 {
 401         return sdio_register_driver(&wl1271_sdio_driver);
 402 }
 403
 404 static void __exit wl1271_exit(void)
 405 {
 406         sdio_unregister_driver(&wl1271_sdio_driver);
 407 }
 408
 409 module_init(wl1271_init);
 410 module_exit(wl1271_exit);
 411
 412 MODULE_LICENSE("GPL");
 413 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
 414 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 415 MODULE_FIRMWARE(WL1271_FW_NAME);
 416 MODULE_FIRMWARE(WL128X_FW_NAME);
 417 MODULE_FIRMWARE(WL127X_AP_FW_NAME);
 418 MODULE_FIRMWARE(WL128X_AP_FW_NAME);