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 /* The max SDIO block size is 256 when working with tx padding to SDIO block */
  55 #define TX_PAD_SDIO_BLK_SIZE                  256
  56
  57 static void wl1271_sdio_set_block_size(struct wl1271 *wl)
  58 {
  59         wl->block_size = TX_PAD_SDIO_BLK_SIZE;
  60
  61         sdio_claim_host(wl->if_priv);
  62         sdio_set_block_size(wl->if_priv, TX_PAD_SDIO_BLK_SIZE);
  63         sdio_release_host(wl->if_priv);
  64 }
  65
  66 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
  67 {
  68         return wl->if_priv;
  69 }
  70
  71 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
  72 {
  73         return &(wl_to_func(wl)->dev);
  74 }
  75
  76 static irqreturn_t wl1271_hardirq(int irq, void *cookie)
  77 {
  78         struct wl1271 *wl = cookie;
  79         unsigned long flags;
  80
  81         wl1271_debug(DEBUG_IRQ, "IRQ");
  82
  83         /* complete the ELP completion */
  84         spin_lock_irqsave(&wl->wl_lock, flags);
  85         set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
  86         if (wl->elp_compl) {
  87                 complete(wl->elp_compl);
  88                 wl->elp_compl = NULL;
  89         }
  90         spin_unlock_irqrestore(&wl->wl_lock, flags);
  91
  92         return IRQ_WAKE_THREAD;
  93 }
  94
  95 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
  96 {
  97         disable_irq(wl->irq);
  98 }
  99
 100 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
 101 {
 102         enable_irq(wl->irq);
 103 }
 104
 105 static void wl1271_sdio_reset(struct wl1271 *wl)
 106 {
 107 }
 108
 109 static void wl1271_sdio_init(struct wl1271 *wl)
 110 {
 111 }
 112
 113 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
 114                                  size_t len, bool fixed)
 115 {
 116         int ret;
 117         struct sdio_func *func = wl_to_func(wl);
 118
 119         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 120                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
 121                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
 122                              addr, ((u8 *)buf)[0]);
 123         } else {
 124                 if (fixed)
 125                         ret = sdio_readsb(func, buf, addr, len);
 126                 else
 127                         ret = sdio_memcpy_fromio(func, buf, addr, len);
 128
 129                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
 130                              addr, len);
 131                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 132         }
 133
 134         if (ret)
 135                 wl1271_error("sdio read failed (%d)", ret);
 136 }
 137
 138 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 139                                   size_t len, bool fixed)
 140 {
 141         int ret;
 142         struct sdio_func *func = wl_to_func(wl);
 143
 144         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 145                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
 146                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
 147                              addr, ((u8 *)buf)[0]);
 148         } else {
 149                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
 150                              addr, len);
 151                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 152
 153                 if (fixed)
 154                         ret = sdio_writesb(func, addr, buf, len);
 155                 else
 156                         ret = sdio_memcpy_toio(func, addr, buf, len);
 157         }
 158
 159         if (ret)
 160                 wl1271_error("sdio write failed (%d)", ret);
 161 }
 162
 163 static int wl1271_sdio_power_on(struct wl1271 *wl)
 164 {
 165         struct sdio_func *func = wl_to_func(wl);
 166         int ret;
 167
 168         /* Make sure the card will not be powered off by runtime PM */
 169         ret = pm_runtime_get_sync(&func->dev);
 170         if (ret < 0)
 171                 goto out;
 172
 173         /* Runtime PM might be disabled, so power up the card manually */
 174         ret = mmc_power_restore_host(func->card->host);
 175         if (ret < 0)
 176                 goto out;
 177
 178         sdio_claim_host(func);
 179         sdio_enable_func(func);
 180
 181         /* Set the default block size in case it was modified */
 182         sdio_set_block_size(func, 0);
 183
 184 out:
 185         return ret;
 186 }
 187
 188 static int wl1271_sdio_power_off(struct wl1271 *wl)
 189 {
 190         struct sdio_func *func = wl_to_func(wl);
 191         int ret;
 192
 193         sdio_disable_func(func);
 194         sdio_release_host(func);
 195
 196         /* Runtime PM might be disabled, so power off the card manually */
 197         ret = mmc_power_save_host(func->card->host);
 198         if (ret < 0)
 199                 return ret;
 200
 201         /* Let runtime PM know the card is powered off */
 202         return pm_runtime_put_sync(&func->dev);
 203 }
 204
 205 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 206 {
 207         if (enable)
 208                 return wl1271_sdio_power_on(wl);
 209         else
 210                 return wl1271_sdio_power_off(wl);
 211 }
 212
 213 static struct wl1271_if_operations sdio_ops = {
 214         .read           = wl1271_sdio_raw_read,
 215         .write          = wl1271_sdio_raw_write,
 216         .reset          = wl1271_sdio_reset,
 217         .init           = wl1271_sdio_init,
 218         .power          = wl1271_sdio_set_power,
 219         .dev            = wl1271_sdio_wl_to_dev,
 220         .enable_irq     = wl1271_sdio_enable_interrupts,
 221         .disable_irq    = wl1271_sdio_disable_interrupts,
 222         .set_block_size = wl1271_sdio_set_block_size,
 223 };
 224
 225 static int __devinit wl1271_probe(struct sdio_func *func,
 226                                   const struct sdio_device_id *id)
 227 {
 228         struct ieee80211_hw *hw;
 229         const struct wl12xx_platform_data *wlan_data;
 230         struct wl1271 *wl;
 231         int ret;
 232
 233         /* We are only able to handle the wlan function */
 234         if (func->num != 0x02)
 235                 return -ENODEV;
 236
 237         hw = wl1271_alloc_hw();
 238         if (IS_ERR(hw))
 239                 return PTR_ERR(hw);
 240
 241         wl = hw->priv;
 242
 243         wl->if_priv = func;
 244         wl->if_ops = &sdio_ops;
 245
 246         /* Grab access to FN0 for ELP reg. */
 247         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 248
 249         wlan_data = wl12xx_get_platform_data();
 250         if (IS_ERR(wlan_data)) {
 251                 ret = PTR_ERR(wlan_data);
 252                 wl1271_error("missing wlan platform data: %d", ret);
 253                 goto out_free;
 254         }
 255
 256         wl->irq = wlan_data->irq;
 257         wl->ref_clock = wlan_data->board_ref_clock;
 258
 259         ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
 260                                    IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 261                                    DRIVER_NAME, wl);
 262         if (ret < 0) {
 263                 wl1271_error("request_irq() failed: %d", ret);
 264                 goto out_free;
 265         }
 266
 267         disable_irq(wl->irq);
 268
 269         ret = wl1271_init_ieee80211(wl);
 270         if (ret)
 271                 goto out_irq;
 272
 273         ret = wl1271_register_hw(wl);
 274         if (ret)
 275                 goto out_irq;
 276
 277         sdio_set_drvdata(func, wl);
 278
 279         /* Tell PM core that we don't need the card to be powered now */
 280         pm_runtime_put_noidle(&func->dev);
 281
 282         wl1271_notice("initialized");
 283
 284         return 0;
 285
 286  out_irq:
 287         free_irq(wl->irq, wl);
 288
 289  out_free:
 290         wl1271_free_hw(wl);
 291
 292         return ret;
 293 }
 294
 295 static void __devexit wl1271_remove(struct sdio_func *func)
 296 {
 297         struct wl1271 *wl = sdio_get_drvdata(func);
 298
 299         /* Undo decrement done above in wl1271_probe */
 300         pm_runtime_get_noresume(&func->dev);
 301
 302         wl1271_unregister_hw(wl);
 303         free_irq(wl->irq, wl);
 304         wl1271_free_hw(wl);
 305 }
 306
 307 static int wl1271_suspend(struct device *dev)
 308 {
 309         /* Tell MMC/SDIO core it's OK to power down the card
 310          * (if it isn't already), but not to remove it completely */
 311         return 0;
 312 }
 313
 314 static int wl1271_resume(struct device *dev)
 315 {
 316         return 0;
 317 }
 318
 319 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
 320         .suspend        = wl1271_suspend,
 321         .resume         = wl1271_resume,
 322 };
 323
 324 static struct sdio_driver wl1271_sdio_driver = {
 325         .name           = "wl1271_sdio",
 326         .id_table       = wl1271_devices,
 327         .probe          = wl1271_probe,
 328         .remove         = __devexit_p(wl1271_remove),
 329         .drv = {
 330                 .pm = &wl1271_sdio_pm_ops,
 331         },
 332 };
 333
 334 static int __init wl1271_init(void)
 335 {
 336         int ret;
 337
 338         ret = sdio_register_driver(&wl1271_sdio_driver);
 339         if (ret < 0) {
 340                 wl1271_error("failed to register sdio driver: %d", ret);
 341                 goto out;
 342         }
 343
 344 out:
 345         return ret;
 346 }
 347
 348 static void __exit wl1271_exit(void)
 349 {
 350         sdio_unregister_driver(&wl1271_sdio_driver);
 351
 352         wl1271_notice("unloaded");
 353 }
 354
 355 module_init(wl1271_init);
 356 module_exit(wl1271_exit);
 357
 358 MODULE_LICENSE("GPL");
 359 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
 360 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 361 MODULE_FIRMWARE(WL1271_FW_NAME);
 362 MODULE_FIRMWARE(WL128X_FW_NAME);
 363 MODULE_FIRMWARE(WL1271_AP_FW_NAME);