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/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[] = {
  48         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
  49         {}
  50 };
  51 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
  52
  53 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
  54 {
  55         return wl->if_priv;
  56 }
  57
  58 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
  59 {
  60         return &(wl_to_func(wl)->dev);
  61 }
  62
  63 static irqreturn_t wl1271_irq(int irq, void *cookie)
  64 {
  65         struct wl1271 *wl = cookie;
  66         unsigned long flags;
  67
  68         wl1271_debug(DEBUG_IRQ, "IRQ");
  69
  70         /* complete the ELP completion */
  71         spin_lock_irqsave(&wl->wl_lock, flags);
  72         if (wl->elp_compl) {
  73                 complete(wl->elp_compl);
  74                 wl->elp_compl = NULL;
  75         }
  76
  77         if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
  78                 ieee80211_queue_work(wl->hw, &wl->irq_work);
  79         set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags);
  80         spin_unlock_irqrestore(&wl->wl_lock, flags);
  81
  82         return IRQ_HANDLED;
  83 }
  84
  85 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
  86 {
  87         disable_irq(wl->irq);
  88 }
  89
  90 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
  91 {
  92         enable_irq(wl->irq);
  93 }
  94
  95 static void wl1271_sdio_reset(struct wl1271 *wl)
  96 {
  97 }
  98
  99 static void wl1271_sdio_init(struct wl1271 *wl)
 100 {
 101 }
 102
 103 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
 104                                  size_t len, bool fixed)
 105 {
 106         int ret;
 107         struct sdio_func *func = wl_to_func(wl);
 108
 109         sdio_claim_host(func);
 110
 111         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 112                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
 113                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
 114                              addr, ((u8 *)buf)[0]);
 115         } else {
 116                 if (fixed)
 117                         ret = sdio_readsb(func, buf, addr, len);
 118                 else
 119                         ret = sdio_memcpy_fromio(func, buf, addr, len);
 120
 121                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
 122                              addr, len);
 123                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 124         }
 125
 126         sdio_release_host(func);
 127
 128         if (ret)
 129                 wl1271_error("sdio read failed (%d)", ret);
 130 }
 131
 132 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 133                                   size_t len, bool fixed)
 134 {
 135         int ret;
 136         struct sdio_func *func = wl_to_func(wl);
 137
 138         sdio_claim_host(func);
 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         sdio_release_host(func);
 156
 157         if (ret)
 158                 wl1271_error("sdio write failed (%d)", ret);
 159 }
 160
 161 static int wl1271_sdio_power_on(struct wl1271 *wl)
 162 {
 163         struct sdio_func *func = wl_to_func(wl);
 164         int ret;
 165
 166         /* Power up the card */
 167         ret = pm_runtime_get_sync(&func->dev);
 168         if (ret < 0)
 169                 goto out;
 170
 171         sdio_claim_host(func);
 172         sdio_enable_func(func);
 173         sdio_release_host(func);
 174
 175 out:
 176         return ret;
 177 }
 178
 179 static int wl1271_sdio_power_off(struct wl1271 *wl)
 180 {
 181         struct sdio_func *func = wl_to_func(wl);
 182
 183         sdio_claim_host(func);
 184         sdio_disable_func(func);
 185         sdio_release_host(func);
 186
 187         /* Power down the card */
 188         return pm_runtime_put_sync(&func->dev);
 189 }
 190
 191 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 192 {
 193         if (enable)
 194                 return wl1271_sdio_power_on(wl);
 195         else
 196                 return wl1271_sdio_power_off(wl);
 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         const struct wl12xx_platform_data *wlan_data;
 215         struct wl1271 *wl;
 216         int ret;
 217
 218         /* We are only able to handle the wlan function */
 219         if (func->num != 0x02)
 220                 return -ENODEV;
 221
 222         hw = wl1271_alloc_hw();
 223         if (IS_ERR(hw))
 224                 return PTR_ERR(hw);
 225
 226         wl = hw->priv;
 227
 228         wl->if_priv = func;
 229         wl->if_ops = &sdio_ops;
 230
 231         /* Grab access to FN0 for ELP reg. */
 232         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 233
 234         wlan_data = wl12xx_get_platform_data();
 235         if (IS_ERR(wlan_data)) {
 236                 ret = PTR_ERR(wlan_data);
 237                 wl1271_error("missing wlan platform data: %d", ret);
 238                 goto out_free;
 239         }
 240
 241         wl->irq = wlan_data->irq;
 242         wl->ref_clock = wlan_data->board_ref_clock;
 243
 244         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
 245         if (ret < 0) {
 246                 wl1271_error("request_irq() failed: %d", ret);
 247                 goto out_free;
 248         }
 249
 250         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
 251
 252         disable_irq(wl->irq);
 253
 254         ret = wl1271_init_ieee80211(wl);
 255         if (ret)
 256                 goto out_irq;
 257
 258         ret = wl1271_register_hw(wl);
 259         if (ret)
 260                 goto out_irq;
 261
 262         sdio_set_drvdata(func, wl);
 263
 264         /* Tell PM core that we don't need the card to be powered now */
 265         pm_runtime_put_noidle(&func->dev);
 266
 267         wl1271_notice("initialized");
 268
 269         return 0;
 270
 271  out_irq:
 272         free_irq(wl->irq, wl);
 273
 274
 275  out_free:
 276         wl1271_free_hw(wl);
 277
 278         return ret;
 279 }
 280
 281 static void __devexit wl1271_remove(struct sdio_func *func)
 282 {
 283         struct wl1271 *wl = sdio_get_drvdata(func);
 284
 285         /* Undo decrement done above in wl1271_probe */
 286         pm_runtime_get_noresume(&func->dev);
 287
 288         wl1271_unregister_hw(wl);
 289         free_irq(wl->irq, wl);
 290         wl1271_free_hw(wl);
 291 }
 292
 293 static int wl1271_suspend(struct device *dev)
 294 {
 295         /* Tell MMC/SDIO core it's OK to power down the card
 296          * (if it isn't already), but not to remove it completely */
 297         return 0;
 298 }
 299
 300 static int wl1271_resume(struct device *dev)
 301 {
 302         return 0;
 303 }
 304
 305 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
 306         .suspend        = wl1271_suspend,
 307         .resume         = wl1271_resume,
 308 };
 309
 310 static struct sdio_driver wl1271_sdio_driver = {
 311         .name           = "wl1271_sdio",
 312         .id_table       = wl1271_devices,
 313         .probe          = wl1271_probe,
 314         .remove         = __devexit_p(wl1271_remove),
 315         .drv = {
 316                 .pm = &wl1271_sdio_pm_ops,
 317         },
 318 };
 319
 320 static int __init wl1271_init(void)
 321 {
 322         int ret;
 323
 324         ret = sdio_register_driver(&wl1271_sdio_driver);
 325         if (ret < 0) {
 326                 wl1271_error("failed to register sdio driver: %d", ret);
 327                 goto out;
 328         }
 329
 330 out:
 331         return ret;
 332 }
 333
 334 static void __exit wl1271_exit(void)
 335 {
 336         sdio_unregister_driver(&wl1271_sdio_driver);
 337
 338         wl1271_notice("unloaded");
 339 }
 340
 341 module_init(wl1271_init);
 342 module_exit(wl1271_exit);
 343
 344 MODULE_LICENSE("GPL");
 345 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
 346 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 347 MODULE_FIRMWARE(WL1271_FW_NAME);