drivers/staging/brcm80211/brcmfmac/bcmsdh_sdmmc_linux.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <typedefs.h>
  18 #include <bcmutils.h>
  19 #include <sdio.h>               /* SDIO Specs */
  20 #include <bcmsdbus.h>           /* bcmsdh to/from specific controller APIs */
  21 #include <sdiovar.h>            /* to get msglevel bit values */
  22
  23 #include <linux/sched.h>        /* request_irq() */
  24
  25 #include <linux/mmc/core.h>
  26 #include <linux/mmc/card.h>
  27 #include <linux/mmc/sdio_func.h>
  28 #include <linux/mmc/sdio_ids.h>
  29
  30 #if !defined(SDIO_VENDOR_ID_BROADCOM)
  31 #define SDIO_VENDOR_ID_BROADCOM         0x02d0
  32 #endif                          /* !defined(SDIO_VENDOR_ID_BROADCOM) */
  33
  34 #define SDIO_DEVICE_ID_BROADCOM_DEFAULT 0x0000
  35
  36 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325_SDGWB)
  37 #define SDIO_DEVICE_ID_BROADCOM_4325_SDGWB      0x0492  /* BCM94325SDGWB */
  38 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4325_SDGWB) */
  39 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325)
  40 #define SDIO_DEVICE_ID_BROADCOM_4325    0x0493
  41 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4325) */
  42 #if !defined(SDIO_DEVICE_ID_BROADCOM_4329)
  43 #define SDIO_DEVICE_ID_BROADCOM_4329    0x4329
  44 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
  45 #if !defined(SDIO_DEVICE_ID_BROADCOM_4319)
  46 #define SDIO_DEVICE_ID_BROADCOM_4319    0x4319
  47 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
  48
  49 #include <bcmsdh_sdmmc.h>
  50
  51 #include <dhd_dbg.h>
  52 #ifdef CONFIG_CFG80211
  53 #include <wl_cfg80211.h>
  54 #endif
  55
  56 extern void sdioh_sdmmc_devintr_off(sdioh_info_t *sd);
  57 extern void sdioh_sdmmc_devintr_on(sdioh_info_t *sd);
  58
  59 int sdio_function_init(void);
  60 void sdio_function_cleanup(void);
  61
  62 /* module param defaults */
  63 static int clockoverride;
  64
  65 module_param(clockoverride, int, 0644);
  66 MODULE_PARM_DESC(clockoverride, "SDIO card clock override");
  67
  68 PBCMSDH_SDMMC_INSTANCE gInstance;
  69
  70 /* Maximum number of bcmsdh_sdmmc devices supported by driver */
  71 #define BCMSDH_SDMMC_MAX_DEVICES 1
  72
  73 extern int bcmsdh_probe(struct device *dev);
  74 extern int bcmsdh_remove(struct device *dev);
  75 struct device sdmmc_dev;
  76
  77 static int bcmsdh_sdmmc_probe(struct sdio_func *func,
  78                               const struct sdio_device_id *id)
  79 {
  80         int ret = 0;
  81         static struct sdio_func sdio_func_0;
  82         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
  83         sd_trace(("sdio_bcmsdh: func->class=%x\n", func->class));
  84         sd_trace(("sdio_vendor: 0x%04x\n", func->vendor));
  85         sd_trace(("sdio_device: 0x%04x\n", func->device));
  86         sd_trace(("Function#: 0x%04x\n", func->num));
  87
  88         if (func->num == 1) {
  89                 sdio_func_0.num = 0;
  90                 sdio_func_0.card = func->card;
  91                 gInstance->func[0] = &sdio_func_0;
  92                 if (func->device == 0x4) {      /* 4318 */
  93                         gInstance->func[2] = NULL;
  94                         sd_trace(("NIC found, calling bcmsdh_probe...\n"));
  95                         ret = bcmsdh_probe(&sdmmc_dev);
  96                 }
  97         }
  98
  99         gInstance->func[func->num] = func;
 100
 101         if (func->num == 2) {
 102 #ifdef CONFIG_CFG80211
 103                 wl_cfg80211_sdio_func(func);
 104 #endif
 105                 sd_trace(("F2 found, calling bcmsdh_probe...\n"));
 106                 ret = bcmsdh_probe(&sdmmc_dev);
 107         }
 108
 109         return ret;
 110 }
 111
 112 static void bcmsdh_sdmmc_remove(struct sdio_func *func)
 113 {
 114         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
 115         sd_info(("sdio_bcmsdh: func->class=%x\n", func->class));
 116         sd_info(("sdio_vendor: 0x%04x\n", func->vendor));
 117         sd_info(("sdio_device: 0x%04x\n", func->device));
 118         sd_info(("Function#: 0x%04x\n", func->num));
 119
 120         if (func->num == 2) {
 121                 sd_trace(("F2 found, calling bcmsdh_remove...\n"));
 122                 bcmsdh_remove(&sdmmc_dev);
 123         }
 124 }
 125
 126 /* devices we support, null terminated */
 127 static const struct sdio_device_id bcmsdh_sdmmc_ids[] = {
 128         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_DEFAULT)},
 129         {SDIO_DEVICE
 130          (SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325_SDGWB)},
 131         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325)},
 132         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
 133         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4319)},
 134         { /* end: all zeroes */ },
 135 };
 136
 137 MODULE_DEVICE_TABLE(sdio, bcmsdh_sdmmc_ids);
 138
 139 static struct sdio_driver bcmsdh_sdmmc_driver = {
 140         .probe = bcmsdh_sdmmc_probe,
 141         .remove = bcmsdh_sdmmc_remove,
 142         .name = "brcmfmac",
 143         .id_table = bcmsdh_sdmmc_ids,
 144 };
 145
 146 struct sdos_info {
 147         sdioh_info_t *sd;
 148         spinlock_t lock;
 149 };
 150
 151 int sdioh_sdmmc_osinit(sdioh_info_t *sd)
 152 {
 153         struct sdos_info *sdos;
 154
 155         sdos = (struct sdos_info *)MALLOC(sd->osh, sizeof(struct sdos_info));
 156         sd->sdos_info = (void *)sdos;
 157         if (sdos == NULL)
 158                 return BCME_NOMEM;
 159
 160         sdos->sd = sd;
 161         spin_lock_init(&sdos->lock);
 162         return BCME_OK;
 163 }
 164
 165 void sdioh_sdmmc_osfree(sdioh_info_t *sd)
 166 {
 167         struct sdos_info *sdos;
 168         ASSERT(sd && sd->sdos_info);
 169
 170         sdos = (struct sdos_info *)sd->sdos_info;
 171         MFREE(sd->osh, sdos, sizeof(struct sdos_info));
 172 }
 173
 174 /* Interrupt enable/disable */
 175 SDIOH_API_RC sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
 176 {
 177         unsigned long flags;
 178         struct sdos_info *sdos;
 179
 180         sd_trace(("%s: %s\n", __func__, enable ? "Enabling" : "Disabling"));
 181
 182         sdos = (struct sdos_info *)sd->sdos_info;
 183         ASSERT(sdos);
 184
 185 #if !defined(OOB_INTR_ONLY)
 186         if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
 187                 sd_err(("%s: no handler registered, will not enable\n",
 188                         __func__));
 189                 return SDIOH_API_RC_FAIL;
 190         }
 191 #endif                          /* !defined(OOB_INTR_ONLY) */
 192
 193         /* Ensure atomicity for enable/disable calls */
 194         spin_lock_irqsave(&sdos->lock, flags);
 195
 196         sd->client_intr_enabled = enable;
 197         if (enable)
 198                 sdioh_sdmmc_devintr_on(sd);
 199         else
 200                 sdioh_sdmmc_devintr_off(sd);
 201
 202         spin_unlock_irqrestore(&sdos->lock, flags);
 203
 204         return SDIOH_API_RC_SUCCESS;
 205 }
 206
 207 /*
 208  * module init
 209 */
 210 int sdio_function_init(void)
 211 {
 212         int error = 0;
 213         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
 214
 215         gInstance = kzalloc(sizeof(BCMSDH_SDMMC_INSTANCE), GFP_KERNEL);
 216         if (!gInstance)
 217                 return -ENOMEM;
 218
 219         bzero(&sdmmc_dev, sizeof(sdmmc_dev));
 220         error = sdio_register_driver(&bcmsdh_sdmmc_driver);
 221
 222         return error;
 223 }
 224
 225 /*
 226  * module cleanup
 227 */
 228 extern int bcmsdh_remove(struct device *dev);
 229 void sdio_function_cleanup(void)
 230 {
 231         sd_trace(("%s Enter\n", __func__));
 232
 233         sdio_unregister_driver(&bcmsdh_sdmmc_driver);
 234
 235         kfree(gInstance);
 236 }