drivers/net/wireless/wl12xx/wl1271_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
  34 #include "wl1271.h"
  35 #include "wl12xx_80211.h"
  36 #include "wl1271_io.h"
  37
  38 #ifndef SDIO_VENDOR_ID_TI
  39 #define SDIO_VENDOR_ID_TI               0x0097
  40 #endif
  41
  42 #ifndef SDIO_DEVICE_ID_TI_WL1271
  43 #define SDIO_DEVICE_ID_TI_WL1271        0x4076
  44 #endif
  45
  46 static const struct sdio_device_id wl1271_devices[] = {
  47         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
  48         {}
  49 };
  50 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
  51
  52 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
  53 {
  54         return wl->if_priv;
  55 }
  56
  57 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
  58 {
  59         return &(wl_to_func(wl)->dev);
  60 }
  61
  62 static irqreturn_t wl1271_irq(int irq, void *cookie)
  63 {
  64         struct wl1271 *wl = cookie;
  65         unsigned long flags;
  66
  67         wl1271_debug(DEBUG_IRQ, "IRQ");
  68
  69         /* complete the ELP completion */
  70         spin_lock_irqsave(&wl->wl_lock, flags);
  71         if (wl->elp_compl) {
  72                 complete(wl->elp_compl);
  73                 wl->elp_compl = NULL;
  74         }
  75
  76         if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
  77                 ieee80211_queue_work(wl->hw, &wl->irq_work);
  78         set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags);
  79         spin_unlock_irqrestore(&wl->wl_lock, flags);
  80
  81         return IRQ_HANDLED;
  82 }
  83
  84 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
  85 {
  86         disable_irq(wl->irq);
  87 }
  88
  89 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
  90 {
  91         enable_irq(wl->irq);
  92 }
  93
  94 static void wl1271_sdio_reset(struct wl1271 *wl)
  95 {
  96 }
  97
  98 static void wl1271_sdio_init(struct wl1271 *wl)
  99 {
 100 }
 101
 102 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
 103                                  size_t len, bool fixed)
 104 {
 105         int ret;
 106         struct sdio_func *func = wl_to_func(wl);
 107
 108         sdio_claim_host(func);
 109
 110         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 111                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
 112                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
 113                              addr, ((u8 *)buf)[0]);
 114         } else {
 115                 if (fixed)
 116                         ret = sdio_readsb(func, buf, addr, len);
 117                 else
 118                         ret = sdio_memcpy_fromio(func, buf, addr, len);
 119
 120                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
 121                              addr, len);
 122                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 123         }
 124
 125         sdio_release_host(func);
 126
 127         if (ret)
 128                 wl1271_error("sdio read failed (%d)", ret);
 129 }
 130
 131 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 132                                   size_t len, bool fixed)
 133 {
 134         int ret;
 135         struct sdio_func *func = wl_to_func(wl);
 136
 137         sdio_claim_host(func);
 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         sdio_release_host(func);
 155
 156         if (ret)
 157                 wl1271_error("sdio write failed (%d)", ret);
 158 }
 159
 160 static int wl1271_sdio_power_on(struct wl1271 *wl)
 161 {
 162         struct sdio_func *func = wl_to_func(wl);
 163
 164         sdio_claim_host(func);
 165         sdio_enable_func(func);
 166         sdio_release_host(func);
 167
 168         return 0;
 169 }
 170
 171 static int wl1271_sdio_power_off(struct wl1271 *wl)
 172 {
 173         struct sdio_func *func = wl_to_func(wl);
 174
 175         sdio_claim_host(func);
 176         sdio_disable_func(func);
 177         sdio_release_host(func);
 178
 179         return 0;
 180 }
 181
 182 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 183 {
 184         /* Let the SDIO stack handle wlan_enable control, so we
 185          * keep host claimed while wlan is in use to keep wl1271
 186          * alive.
 187          */
 188         if (enable)
 189                 return wl1271_sdio_power_on(wl);
 190         else
 191                 return wl1271_sdio_power_off(wl);
 192 }
 193
 194 static struct wl1271_if_operations sdio_ops = {
 195         .read           = wl1271_sdio_raw_read,
 196         .write          = wl1271_sdio_raw_write,
 197         .reset          = wl1271_sdio_reset,
 198         .init           = wl1271_sdio_init,
 199         .power          = wl1271_sdio_set_power,
 200         .dev            = wl1271_sdio_wl_to_dev,
 201         .enable_irq     = wl1271_sdio_enable_interrupts,
 202         .disable_irq    = wl1271_sdio_disable_interrupts
 203 };
 204
 205 static int __devinit wl1271_probe(struct sdio_func *func,
 206                                   const struct sdio_device_id *id)
 207 {
 208         struct ieee80211_hw *hw;
 209         const struct wl12xx_platform_data *wlan_data;
 210         struct wl1271 *wl;
 211         int ret;
 212
 213         /* We are only able to handle the wlan function */
 214         if (func->num != 0x02)
 215                 return -ENODEV;
 216
 217         hw = wl1271_alloc_hw();
 218         if (IS_ERR(hw))
 219                 return PTR_ERR(hw);
 220
 221         wl = hw->priv;
 222
 223         wl->if_priv = func;
 224         wl->if_ops = &sdio_ops;
 225
 226         /* Grab access to FN0 for ELP reg. */
 227         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 228
 229         wlan_data = wl12xx_get_platform_data();
 230         if (IS_ERR(wlan_data)) {
 231                 ret = PTR_ERR(wlan_data);
 232                 wl1271_error("missing wlan platform data: %d", ret);
 233                 goto out_free;
 234         }
 235
 236         wl->irq = wlan_data->irq;
 237         wl->ref_clock = wlan_data->board_ref_clock;
 238
 239         ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
 240         if (ret < 0) {
 241                 wl1271_error("request_irq() failed: %d", ret);
 242                 goto out_free;
 243         }
 244
 245         set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
 246
 247         disable_irq(wl->irq);
 248
 249         ret = wl1271_init_ieee80211(wl);
 250         if (ret)
 251                 goto out_irq;
 252
 253         ret = wl1271_register_hw(wl);
 254         if (ret)
 255                 goto out_irq;
 256
 257         sdio_set_drvdata(func, wl);
 258
 259         wl1271_notice("initialized");
 260
 261         return 0;
 262
 263  out_irq:
 264         free_irq(wl->irq, wl);
 265
 266
 267  out_free:
 268         wl1271_free_hw(wl);
 269
 270         return ret;
 271 }
 272
 273 static void __devexit wl1271_remove(struct sdio_func *func)
 274 {
 275         struct wl1271 *wl = sdio_get_drvdata(func);
 276
 277         free_irq(wl->irq, wl);
 278
 279         wl1271_unregister_hw(wl);
 280         wl1271_free_hw(wl);
 281 }
 282
 283 static struct sdio_driver wl1271_sdio_driver = {
 284         .name           = "wl1271_sdio",
 285         .id_table       = wl1271_devices,
 286         .probe          = wl1271_probe,
 287         .remove         = __devexit_p(wl1271_remove),
 288 };
 289
 290 static int __init wl1271_init(void)
 291 {
 292         int ret;
 293
 294         ret = sdio_register_driver(&wl1271_sdio_driver);
 295         if (ret < 0) {
 296                 wl1271_error("failed to register sdio driver: %d", ret);
 297                 goto out;
 298         }
 299
 300 out:
 301         return ret;
 302 }
 303
 304 static void __exit wl1271_exit(void)
 305 {
 306         sdio_unregister_driver(&wl1271_sdio_driver);
 307
 308         wl1271_notice("unloaded");
 309 }
 310
 311 module_init(wl1271_init);
 312 module_exit(wl1271_exit);
 313
 314 MODULE_LICENSE("GPL");
 315 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
 316 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
 317 MODULE_FIRMWARE(WL1271_FW_NAME);