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/platform_device.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 struct wl12xx_sdio_glue {
  49         struct device *dev;
  50         struct platform_device *core;
  51 };
  52
  53 static const struct sdio_device_id wl1271_devices[] __devinitconst = {
  54         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
  55         {}
  56 };
  57 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
  58
  59 static void wl1271_sdio_set_block_size(struct device *child,
  60                                        unsigned int blksz)
  61 {
  62         struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
  63         struct sdio_func *func = dev_to_sdio_func(glue->dev);
  64
  65         sdio_claim_host(func);
  66         sdio_set_block_size(func, blksz);
  67         sdio_release_host(func);
  68 }
  69
  70 static void wl12xx_sdio_raw_read(struct device *child, int addr, void *buf,
  71                                  size_t len, bool fixed)
  72 {
  73         int ret;
  74         struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
  75         struct sdio_func *func = dev_to_sdio_func(glue->dev);
  76
  77         sdio_claim_host(func);
  78
  79         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
  80                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
  81                 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
  82                         addr, ((u8 *)buf)[0]);
  83         } else {
  84                 if (fixed)
  85                         ret = sdio_readsb(func, buf, addr, len);
  86                 else
  87                         ret = sdio_memcpy_fromio(func, buf, addr, len);
  88
  89                 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
  90                         addr, len);
  91         }
  92
  93         sdio_release_host(func);
  94
  95         if (ret)
  96                 dev_err(child->parent, "sdio read failed (%d)\n", ret);
  97 }
  98
  99 static void wl12xx_sdio_raw_write(struct device *child, int addr, void *buf,
 100                                   size_t len, bool fixed)
 101 {
 102         int ret;
 103         struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
 104         struct sdio_func *func = dev_to_sdio_func(glue->dev);
 105
 106         sdio_claim_host(func);
 107
 108         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 109                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
 110                 dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
 111                         addr, ((u8 *)buf)[0]);
 112         } else {
 113                 dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
 114                         addr, len);
 115
 116                 if (fixed)
 117                         ret = sdio_writesb(func, addr, buf, len);
 118                 else
 119                         ret = sdio_memcpy_toio(func, addr, buf, len);
 120         }
 121
 122         sdio_release_host(func);
 123
 124         if (ret)
 125                 dev_err(child->parent, "sdio write failed (%d)\n", ret);
 126 }
 127
 128 static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
 129 {
 130         int ret;
 131         struct sdio_func *func = dev_to_sdio_func(glue->dev);
 132
 133         /* If enabled, tell runtime PM not to power off the card */
 134         if (pm_runtime_enabled(&func->dev)) {
 135                 ret = pm_runtime_get_sync(&func->dev);
 136                 if (ret < 0)
 137                         goto out;
 138         } else {
 139                 /* Runtime PM is disabled: power up the card manually */
 140                 ret = mmc_power_restore_host(func->card->host);
 141                 if (ret < 0)
 142                         goto out;
 143         }
 144
 145         sdio_claim_host(func);
 146         sdio_enable_func(func);
 147         sdio_release_host(func);
 148
 149 out:
 150         return ret;
 151 }
 152
 153 static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue)
 154 {
 155         int ret;
 156         struct sdio_func *func = dev_to_sdio_func(glue->dev);
 157
 158         sdio_claim_host(func);
 159         sdio_disable_func(func);
 160         sdio_release_host(func);
 161
 162         /* Power off the card manually, even if runtime PM is enabled. */
 163         ret = mmc_power_save_host(func->card->host);
 164         if (ret < 0)
 165                 return ret;
 166
 167         /* If enabled, let runtime PM know the card is powered off */
 168         if (pm_runtime_enabled(&func->dev))
 169                 ret = pm_runtime_put_sync(&func->dev);
 170
 171         return ret;
 172 }
 173
 174 static int wl12xx_sdio_set_power(struct device *child, bool enable)
 175 {
 176         struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
 177
 178         if (enable)
 179                 return wl12xx_sdio_power_on(glue);
 180         else
 181                 return wl12xx_sdio_power_off(glue);
 182 }
 183
 184 static struct wl1271_if_operations sdio_ops = {
 185         .read           = wl12xx_sdio_raw_read,
 186         .write          = wl12xx_sdio_raw_write,
 187         .power          = wl12xx_sdio_set_power,
 188         .set_block_size = wl1271_sdio_set_block_size,
 189 };
 190
 191 static int __devinit wl1271_probe(struct sdio_func *func,
 192                                   const struct sdio_device_id *id)
 193 {
 194         struct wl12xx_platform_data *wlan_data;
 195         struct wl12xx_sdio_glue *glue;
 196         struct resource res[1];
 197         mmc_pm_flag_t mmcflags;
 198         int ret = -ENOMEM;
 199
 200         /* We are only able to handle the wlan function */
 201         if (func->num != 0x02)
 202                 return -ENODEV;
 203
 204         glue = kzalloc(sizeof(*glue), GFP_KERNEL);
 205         if (!glue) {
 206                 dev_err(&func->dev, "can't allocate glue\n");
 207                 goto out;
 208         }
 209
 210         glue->dev = &func->dev;
 211
 212         /* Grab access to FN0 for ELP reg. */
 213         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 214
 215         /* Use block mode for transferring over one block size of data */
 216         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
 217
 218         wlan_data = wl12xx_get_platform_data();
 219         if (IS_ERR(wlan_data)) {
 220                 ret = PTR_ERR(wlan_data);
 221                 dev_err(glue->dev, "missing wlan platform data: %d\n", ret);
 222                 goto out_free_glue;
 223         }
 224
 225         /* if sdio can keep power while host is suspended, enable wow */
 226         mmcflags = sdio_get_host_pm_caps(func);
 227         dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
 228
 229         if (mmcflags & MMC_PM_KEEP_POWER)
 230                 wlan_data->pwr_in_suspend = true;
 231
 232         wlan_data->ops = &sdio_ops;
 233
 234         sdio_set_drvdata(func, glue);
 235
 236         /* Tell PM core that we don't need the card to be powered now */
 237         pm_runtime_put_noidle(&func->dev);
 238
 239         glue->core = platform_device_alloc("wl12xx", -1);
 240         if (!glue->core) {
 241                 dev_err(glue->dev, "can't allocate platform_device");
 242                 ret = -ENOMEM;
 243                 goto out_free_glue;
 244         }
 245
 246         glue->core->dev.parent = &func->dev;
 247
 248         memset(res, 0x00, sizeof(res));
 249
 250         res[0].start = wlan_data->irq;
 251         res[0].flags = IORESOURCE_IRQ;
 252         res[0].name = "irq";
 253
 254         ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
 255         if (ret) {
 256                 dev_err(glue->dev, "can't add resources\n");
 257                 goto out_dev_put;
 258         }
 259
 260         ret = platform_device_add_data(glue->core, wlan_data,
 261                                        sizeof(*wlan_data));
 262         if (ret) {
 263                 dev_err(glue->dev, "can't add platform data\n");
 264                 goto out_dev_put;
 265         }
 266
 267         ret = platform_device_add(glue->core);
 268         if (ret) {
 269                 dev_err(glue->dev, "can't add platform device\n");
 270                 goto out_dev_put;
 271         }
 272         return 0;
 273
 274 out_dev_put:
 275         platform_device_put(glue->core);
 276
 277 out_free_glue:
 278         kfree(glue);
 279
 280 out:
 281         return ret;
 282 }
 283
 284 static void __devexit wl1271_remove(struct sdio_func *func)
 285 {
 286         struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
 287
 288         /* Undo decrement done above in wl1271_probe */
 289         pm_runtime_get_noresume(&func->dev);
 290
 291         platform_device_del(glue->core);
 292         platform_device_put(glue->core);
 293         kfree(glue);
 294 }
 295
 296 #ifdef CONFIG_PM
 297 static int wl1271_suspend(struct device *dev)
 298 {
 299         /* Tell MMC/SDIO core it's OK to power down the card
 300          * (if it isn't already), but not to remove it completely */
 301         struct sdio_func *func = dev_to_sdio_func(dev);
 302         struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
 303         struct wl1271 *wl = platform_get_drvdata(glue->core);
 304         mmc_pm_flag_t sdio_flags;
 305         int ret = 0;
 306
 307         dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
 308                 wl->wow_enabled);
 309
 310         /* check whether sdio should keep power */
 311         if (wl->wow_enabled) {
 312                 sdio_flags = sdio_get_host_pm_caps(func);
 313
 314                 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
 315                         dev_err(dev, "can't keep power while host "
 316                                      "is suspended\n");
 317                         ret = -EINVAL;
 318                         goto out;
 319                 }
 320
 321                 /* keep power while host suspended */
 322                 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
 323                 if (ret) {
 324                         dev_err(dev, "error while trying to keep power\n");
 325                         goto out;
 326                 }
 327         }
 328 out:
 329         return ret;
 330 }
 331
 332 static int wl1271_resume(struct device *dev)
 333 {
 334         dev_dbg(dev, "wl1271 resume\n");
 335
 336         return 0;
 337 }
 338
 339 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
 340         .suspend        = wl1271_suspend,
 341         .resume         = wl1271_resume,
 342 };
 343 #endif
 344
 345 static struct sdio_driver wl1271_sdio_driver = {
 346         .name           = "wl1271_sdio",
 347         .id_table       = wl1271_devices,
 348         .probe          = wl1271_probe,
 349         .remove         = __devexit_p(wl1271_remove),
 350 #ifdef CONFIG_PM
 351         .drv = {
 352                 .pm = &wl1271_sdio_pm_ops,
 353         },
 354 #endif
 355 };
 356
 357 static int __init wl1271_init(void)
 358 {
 359         return sdio_register_driver(&wl1271_sdio_driver);
 360 }
 361
 362 static void __exit wl1271_exit(void)
 363 {
 364         sdio_unregister_driver(&wl1271_sdio_driver);
 365 }
 366
 367 module_init(wl1271_init);
 368 module_exit(wl1271_exit);
 369
 370 MODULE_LICENSE("GPL");
 371 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
 372 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 373 MODULE_FIRMWARE(WL127X_FW_NAME_SINGLE);
 374 MODULE_FIRMWARE(WL127X_FW_NAME_MULTI);
 375 MODULE_FIRMWARE(WL127X_PLT_FW_NAME);
 376 MODULE_FIRMWARE(WL128X_FW_NAME_SINGLE);
 377 MODULE_FIRMWARE(WL128X_FW_NAME_MULTI);
 378 MODULE_FIRMWARE(WL128X_PLT_FW_NAME);