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 #include <linux/types.h>
  17 #include <linux/sched.h>        /* request_irq() */
  18 #include <bcmdefs.h>
  19 #include <bcmutils.h>
  20 #include <sdio.h>               /* SDIO Specs */
  21 #include <bcmsdbus.h>           /* bcmsdh to/from specific controller APIs */
  22 #include <sdiovar.h>            /* to get msglevel bit values */
  23
  24 #include <linux/mmc/core.h>
  25 #include <linux/mmc/card.h>
  26 #include <linux/mmc/sdio_func.h>
  27 #include <linux/mmc/sdio_ids.h>
  28
  29 #if !defined(SDIO_VENDOR_ID_BROADCOM)
  30 #define SDIO_VENDOR_ID_BROADCOM         0x02d0
  31 #endif                          /* !defined(SDIO_VENDOR_ID_BROADCOM) */
  32
  33 #define SDIO_DEVICE_ID_BROADCOM_DEFAULT 0x0000
  34
  35 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325_SDGWB)
  36 #define SDIO_DEVICE_ID_BROADCOM_4325_SDGWB      0x0492  /* BCM94325SDGWB */
  37 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4325_SDGWB) */
  38 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325)
  39 #define SDIO_DEVICE_ID_BROADCOM_4325    0x0493
  40 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4325) */
  41 #if !defined(SDIO_DEVICE_ID_BROADCOM_4329)
  42 #define SDIO_DEVICE_ID_BROADCOM_4329    0x4329
  43 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
  44 #if !defined(SDIO_DEVICE_ID_BROADCOM_4319)
  45 #define SDIO_DEVICE_ID_BROADCOM_4319    0x4319
  46 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
  47
  48 #include <bcmsdh_sdmmc.h>
  49
  50 #include <dhd_dbg.h>
  51 #include <wl_cfg80211.h>
  52
  53 extern void sdioh_sdmmc_devintr_off(sdioh_info_t *sd);
  54 extern void sdioh_sdmmc_devintr_on(sdioh_info_t *sd);
  55
  56 int sdio_function_init(void);
  57 void sdio_function_cleanup(void);
  58
  59 /* module param defaults */
  60 static int clockoverride;
  61
  62 module_param(clockoverride, int, 0644);
  63 MODULE_PARM_DESC(clockoverride, "SDIO card clock override");
  64
  65 PBCMSDH_SDMMC_INSTANCE gInstance;
  66
  67 /* Maximum number of bcmsdh_sdmmc devices supported by driver */
  68 #define BCMSDH_SDMMC_MAX_DEVICES 1
  69
  70 extern int bcmsdh_probe(struct device *dev);
  71 extern int bcmsdh_remove(struct device *dev);
  72 struct device sdmmc_dev;
  73
  74 static int bcmsdh_sdmmc_probe(struct sdio_func *func,
  75                               const struct sdio_device_id *id)
  76 {
  77         int ret = 0;
  78         static struct sdio_func sdio_func_0;
  79         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
  80         sd_trace(("sdio_bcmsdh: func->class=%x\n", func->class));
  81         sd_trace(("sdio_vendor: 0x%04x\n", func->vendor));
  82         sd_trace(("sdio_device: 0x%04x\n", func->device));
  83         sd_trace(("Function#: 0x%04x\n", func->num));
  84
  85         if (func->num == 1) {
  86                 sdio_func_0.num = 0;
  87                 sdio_func_0.card = func->card;
  88                 gInstance->func[0] = &sdio_func_0;
  89                 if (func->device == 0x4) {      /* 4318 */
  90                         gInstance->func[2] = NULL;
  91                         sd_trace(("NIC found, calling bcmsdh_probe...\n"));
  92                         ret = bcmsdh_probe(&sdmmc_dev);
  93                 }
  94         }
  95
  96         gInstance->func[func->num] = func;
  97
  98         if (func->num == 2) {
  99                 wl_cfg80211_sdio_func(func);
 100                 sd_trace(("F2 found, calling bcmsdh_probe...\n"));
 101                 ret = bcmsdh_probe(&sdmmc_dev);
 102         }
 103
 104         return ret;
 105 }
 106
 107 static void bcmsdh_sdmmc_remove(struct sdio_func *func)
 108 {
 109         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
 110         sd_info(("sdio_bcmsdh: func->class=%x\n", func->class));
 111         sd_info(("sdio_vendor: 0x%04x\n", func->vendor));
 112         sd_info(("sdio_device: 0x%04x\n", func->device));
 113         sd_info(("Function#: 0x%04x\n", func->num));
 114
 115         if (func->num == 2) {
 116                 sd_trace(("F2 found, calling bcmsdh_remove...\n"));
 117                 bcmsdh_remove(&sdmmc_dev);
 118         }
 119 }
 120
 121 /* devices we support, null terminated */
 122 static const struct sdio_device_id bcmsdh_sdmmc_ids[] = {
 123         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_DEFAULT)},
 124         {SDIO_DEVICE
 125          (SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325_SDGWB)},
 126         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325)},
 127         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
 128         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4319)},
 129         { /* end: all zeroes */ },
 130 };
 131
 132 MODULE_DEVICE_TABLE(sdio, bcmsdh_sdmmc_ids);
 133
 134 static struct sdio_driver bcmsdh_sdmmc_driver = {
 135         .probe = bcmsdh_sdmmc_probe,
 136         .remove = bcmsdh_sdmmc_remove,
 137         .name = "brcmfmac",
 138         .id_table = bcmsdh_sdmmc_ids,
 139 };
 140
 141 struct sdos_info {
 142         sdioh_info_t *sd;
 143         spinlock_t lock;
 144 };
 145
 146 int sdioh_sdmmc_osinit(sdioh_info_t *sd)
 147 {
 148         struct sdos_info *sdos;
 149
 150         sdos = kmalloc(sizeof(struct sdos_info), GFP_ATOMIC);
 151         sd->sdos_info = (void *)sdos;
 152         if (sdos == NULL)
 153                 return BCME_NOMEM;
 154
 155         sdos->sd = sd;
 156         spin_lock_init(&sdos->lock);
 157         return BCME_OK;
 158 }
 159
 160 void sdioh_sdmmc_osfree(sdioh_info_t *sd)
 161 {
 162         struct sdos_info *sdos;
 163         ASSERT(sd && sd->sdos_info);
 164
 165         sdos = (struct sdos_info *)sd->sdos_info;
 166         kfree(sdos);
 167 }
 168
 169 /* Interrupt enable/disable */
 170 SDIOH_API_RC sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
 171 {
 172         unsigned long flags;
 173         struct sdos_info *sdos;
 174
 175         sd_trace(("%s: %s\n", __func__, enable ? "Enabling" : "Disabling"));
 176
 177         sdos = (struct sdos_info *)sd->sdos_info;
 178         ASSERT(sdos);
 179
 180 #if !defined(OOB_INTR_ONLY)
 181         if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
 182                 sd_err(("%s: no handler registered, will not enable\n",
 183                         __func__));
 184                 return SDIOH_API_RC_FAIL;
 185         }
 186 #endif                          /* !defined(OOB_INTR_ONLY) */
 187
 188         /* Ensure atomicity for enable/disable calls */
 189         spin_lock_irqsave(&sdos->lock, flags);
 190
 191         sd->client_intr_enabled = enable;
 192         if (enable)
 193                 sdioh_sdmmc_devintr_on(sd);
 194         else
 195                 sdioh_sdmmc_devintr_off(sd);
 196
 197         spin_unlock_irqrestore(&sdos->lock, flags);
 198
 199         return SDIOH_API_RC_SUCCESS;
 200 }
 201
 202 /*
 203  * module init
 204 */
 205 int sdio_function_init(void)
 206 {
 207         int error = 0;
 208         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
 209
 210         gInstance = kzalloc(sizeof(BCMSDH_SDMMC_INSTANCE), GFP_KERNEL);
 211         if (!gInstance)
 212                 return -ENOMEM;
 213
 214         bzero(&sdmmc_dev, sizeof(sdmmc_dev));
 215         error = sdio_register_driver(&bcmsdh_sdmmc_driver);
 216
 217         return error;
 218 }
 219
 220 /*
 221  * module cleanup
 222 */
 223 extern int bcmsdh_remove(struct device *dev);
 224 void sdio_function_cleanup(void)
 225 {
 226         sd_trace(("%s Enter\n", __func__));
 227
 228         sdio_unregister_driver(&bcmsdh_sdmmc_driver);
 229
 230         kfree(gInstance);
 231 }