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 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         spin_unlock_irqrestore(&wl->wl_lock, flags);
  86
  87         return IRQ_WAKE_THREAD;
  88 }
  89
  90 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
  91 {
  92         disable_irq(wl->irq);
  93 }
  94
  95 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
  96 {
  97         enable_irq(wl->irq);
  98 }
  99
 100 static void wl1271_sdio_reset(struct wl1271 *wl)
 101 {
 102 }
 103
 104 static void wl1271_sdio_init(struct wl1271 *wl)
 105 {
 106 }
 107
 108 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
 109                                  size_t len, bool fixed)
 110 {
 111         int ret;
 112         struct sdio_func *func = wl_to_func(wl);
 113
 114         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 115                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
 116                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
 117                              addr, ((u8 *)buf)[0]);
 118         } else {
 119                 if (fixed)
 120                         ret = sdio_readsb(func, buf, addr, len);
 121                 else
 122                         ret = sdio_memcpy_fromio(func, buf, addr, len);
 123
 124                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
 125                              addr, len);
 126                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 127         }
 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         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 140                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
 141                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
 142                              addr, ((u8 *)buf)[0]);
 143         } else {
 144                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
 145                              addr, len);
 146                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 147
 148                 if (fixed)
 149                         ret = sdio_writesb(func, addr, buf, len);
 150                 else
 151                         ret = sdio_memcpy_toio(func, addr, buf, len);
 152         }
 153
 154         if (ret)
 155                 wl1271_error("sdio write failed (%d)", ret);
 156 }
 157
 158 static int wl1271_sdio_power_on(struct wl1271 *wl)
 159 {
 160         struct sdio_func *func = wl_to_func(wl);
 161         int ret;
 162
 163         /* Make sure the card will not be powered off by runtime PM */
 164         ret = pm_runtime_get_sync(&func->dev);
 165         if (ret < 0)
 166                 goto out;
 167
 168         /* Runtime PM might be disabled, so power up the card manually */
 169         ret = mmc_power_restore_host(func->card->host);
 170         if (ret < 0)
 171                 goto out;
 172
 173         sdio_claim_host(func);
 174         sdio_enable_func(func);
 175
 176 out:
 177         return ret;
 178 }
 179
 180 static int wl1271_sdio_power_off(struct wl1271 *wl)
 181 {
 182         struct sdio_func *func = wl_to_func(wl);
 183         int ret;
 184
 185         sdio_disable_func(func);
 186         sdio_release_host(func);
 187
 188         /* Runtime PM might be disabled, so power off the card manually */
 189         ret = mmc_power_save_host(func->card->host);
 190         if (ret < 0)
 191                 return ret;
 192
 193         /* Let runtime PM know the card is powered off */
 194         return pm_runtime_put_sync(&func->dev);
 195 }
 196
 197 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 198 {
 199         if (enable)
 200                 return wl1271_sdio_power_on(wl);
 201         else
 202                 return wl1271_sdio_power_off(wl);
 203 }
 204
 205 static struct wl1271_if_operations sdio_ops = {
 206         .read           = wl1271_sdio_raw_read,
 207         .write          = wl1271_sdio_raw_write,
 208         .reset          = wl1271_sdio_reset,
 209         .init           = wl1271_sdio_init,
 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         int ret;
 224
 225         /* We are only able to handle the wlan function */
 226         if (func->num != 0x02)
 227                 return -ENODEV;
 228
 229         hw = wl1271_alloc_hw();
 230         if (IS_ERR(hw))
 231                 return PTR_ERR(hw);
 232
 233         wl = hw->priv;
 234
 235         wl->if_priv = func;
 236         wl->if_ops = &sdio_ops;
 237
 238         /* Grab access to FN0 for ELP reg. */
 239         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 240
 241         /* Use block mode for transferring over one block size of data */
 242         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
 243
 244         wlan_data = wl12xx_get_platform_data();
 245         if (IS_ERR(wlan_data)) {
 246                 ret = PTR_ERR(wlan_data);
 247                 wl1271_error("missing wlan platform data: %d", ret);
 248                 goto out_free;
 249         }
 250
 251         wl->irq = wlan_data->irq;
 252         wl->ref_clock = wlan_data->board_ref_clock;
 253         wl->tcxo_clock = wlan_data->board_tcxo_clock;
 254
 255         ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
 256                                    IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 257                                    DRIVER_NAME, wl);
 258         if (ret < 0) {
 259                 wl1271_error("request_irq() failed: %d", ret);
 260                 goto out_free;
 261         }
 262
 263         disable_irq(wl->irq);
 264
 265         ret = wl1271_init_ieee80211(wl);
 266         if (ret)
 267                 goto out_irq;
 268
 269         ret = wl1271_register_hw(wl);
 270         if (ret)
 271                 goto out_irq;
 272
 273         sdio_set_drvdata(func, wl);
 274
 275         /* Tell PM core that we don't need the card to be powered now */
 276         pm_runtime_put_noidle(&func->dev);
 277
 278         wl1271_notice("initialized");
 279
 280         return 0;
 281
 282  out_irq:
 283         free_irq(wl->irq, wl);
 284
 285  out_free:
 286         wl1271_free_hw(wl);
 287
 288         return ret;
 289 }
 290
 291 static void __devexit wl1271_remove(struct sdio_func *func)
 292 {
 293         struct wl1271 *wl = sdio_get_drvdata(func);
 294
 295         /* Undo decrement done above in wl1271_probe */
 296         pm_runtime_get_noresume(&func->dev);
 297
 298         wl1271_unregister_hw(wl);
 299         free_irq(wl->irq, wl);
 300         wl1271_free_hw(wl);
 301 }
 302
 303 static int wl1271_suspend(struct device *dev)
 304 {
 305         /* Tell MMC/SDIO core it's OK to power down the card
 306          * (if it isn't already), but not to remove it completely */
 307         return 0;
 308 }
 309
 310 static int wl1271_resume(struct device *dev)
 311 {
 312         return 0;
 313 }
 314
 315 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
 316         .suspend        = wl1271_suspend,
 317         .resume         = wl1271_resume,
 318 };
 319
 320 static struct sdio_driver wl1271_sdio_driver = {
 321         .name           = "wl1271_sdio",
 322         .id_table       = wl1271_devices,
 323         .probe          = wl1271_probe,
 324         .remove         = __devexit_p(wl1271_remove),
 325         .drv = {
 326                 .pm = &wl1271_sdio_pm_ops,
 327         },
 328 };
 329
 330 static int __init wl1271_init(void)
 331 {
 332         int ret;
 333
 334         ret = sdio_register_driver(&wl1271_sdio_driver);
 335         if (ret < 0) {
 336                 wl1271_error("failed to register sdio driver: %d", ret);
 337                 goto out;
 338         }
 339
 340 out:
 341         return ret;
 342 }
 343
 344 static void __exit wl1271_exit(void)
 345 {
 346         sdio_unregister_driver(&wl1271_sdio_driver);
 347
 348         wl1271_notice("unloaded");
 349 }
 350
 351 module_init(wl1271_init);
 352 module_exit(wl1271_exit);
 353
 354 MODULE_LICENSE("GPL");
 355 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
 356 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 357 MODULE_FIRMWARE(WL1271_FW_NAME);
 358 MODULE_FIRMWARE(WL128X_FW_NAME);
 359 MODULE_FIRMWARE(WL127X_AP_FW_NAME);
 360 MODULE_FIRMWARE(WL128X_AP_FW_NAME);