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 <linux/netdevice.h>
  19 #include <bcmdefs.h>
  20 #include <bcmutils.h>
  21 #include <sdio.h>               /* SDIO Specs */
  22 #include <bcmsdbus.h>           /* bcmsdh to/from specific controller APIs */
  23 #include <sdiovar.h>            /* to get msglevel bit values */
  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 #include "dngl_stats.h"
  31 #include "dhd.h"
  32
  33 #if !defined(SDIO_VENDOR_ID_BROADCOM)
  34 #define SDIO_VENDOR_ID_BROADCOM         0x02d0
  35 #endif                          /* !defined(SDIO_VENDOR_ID_BROADCOM) */
  36
  37 #define SDIO_DEVICE_ID_BROADCOM_DEFAULT 0x0000
  38
  39 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325_SDGWB)
  40 #define SDIO_DEVICE_ID_BROADCOM_4325_SDGWB      0x0492  /* BCM94325SDGWB */
  41 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4325_SDGWB) */
  42 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325)
  43 #define SDIO_DEVICE_ID_BROADCOM_4325    0x0493
  44 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4325) */
  45 #if !defined(SDIO_DEVICE_ID_BROADCOM_4329)
  46 #define SDIO_DEVICE_ID_BROADCOM_4329    0x4329
  47 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
  48 #if !defined(SDIO_DEVICE_ID_BROADCOM_4319)
  49 #define SDIO_DEVICE_ID_BROADCOM_4319    0x4319
  50 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
  51
  52 #include <bcmsdh_sdmmc.h>
  53
  54 #include <dhd_dbg.h>
  55 #include <wl_cfg80211.h>
  56
  57 extern void sdioh_sdmmc_devintr_off(sdioh_info_t *sd);
  58 extern void sdioh_sdmmc_devintr_on(sdioh_info_t *sd);
  59
  60 int sdio_function_init(void);
  61 void sdio_function_cleanup(void);
  62
  63 /* module param defaults */
  64 static int clockoverride;
  65
  66 module_param(clockoverride, int, 0644);
  67 MODULE_PARM_DESC(clockoverride, "SDIO card clock override");
  68
  69 PBCMSDH_SDMMC_INSTANCE gInstance;
  70
  71 /* Maximum number of bcmsdh_sdmmc devices supported by driver */
  72 #define BCMSDH_SDMMC_MAX_DEVICES 1
  73
  74 extern int bcmsdh_probe(struct device *dev);
  75 extern int bcmsdh_remove(struct device *dev);
  76 struct device sdmmc_dev;
  77
  78 static int bcmsdh_sdmmc_probe(struct sdio_func *func,
  79                               const struct sdio_device_id *id)
  80 {
  81         int ret = 0;
  82         static struct sdio_func sdio_func_0;
  83         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
  84         sd_trace(("sdio_bcmsdh: func->class=%x\n", func->class));
  85         sd_trace(("sdio_vendor: 0x%04x\n", func->vendor));
  86         sd_trace(("sdio_device: 0x%04x\n", func->device));
  87         sd_trace(("Function#: 0x%04x\n", func->num));
  88
  89         if (func->num == 1) {
  90                 sdio_func_0.num = 0;
  91                 sdio_func_0.card = func->card;
  92                 gInstance->func[0] = &sdio_func_0;
  93                 if (func->device == 0x4) {      /* 4318 */
  94                         gInstance->func[2] = NULL;
  95                         sd_trace(("NIC found, calling bcmsdh_probe...\n"));
  96                         ret = bcmsdh_probe(&sdmmc_dev);
  97                 }
  98         }
  99
 100         gInstance->func[func->num] = func;
 101
 102         if (func->num == 2) {
 103                 wl_cfg80211_sdio_func(func);
 104                 sd_trace(("F2 found, calling bcmsdh_probe...\n"));
 105                 ret = bcmsdh_probe(&sdmmc_dev);
 106         }
 107
 108         return ret;
 109 }
 110
 111 static void bcmsdh_sdmmc_remove(struct sdio_func *func)
 112 {
 113         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
 114         sd_info(("sdio_bcmsdh: func->class=%x\n", func->class));
 115         sd_info(("sdio_vendor: 0x%04x\n", func->vendor));
 116         sd_info(("sdio_device: 0x%04x\n", func->device));
 117         sd_info(("Function#: 0x%04x\n", func->num));
 118
 119         if (func->num == 2) {
 120                 sd_trace(("F2 found, calling bcmsdh_remove...\n"));
 121                 bcmsdh_remove(&sdmmc_dev);
 122         }
 123 }
 124
 125 /* devices we support, null terminated */
 126 static const struct sdio_device_id bcmsdh_sdmmc_ids[] = {
 127         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_DEFAULT)},
 128         {SDIO_DEVICE
 129          (SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325_SDGWB)},
 130         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325)},
 131         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
 132         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4319)},
 133         { /* end: all zeroes */ },
 134 };
 135
 136 MODULE_DEVICE_TABLE(sdio, bcmsdh_sdmmc_ids);
 137
 138 static struct sdio_driver bcmsdh_sdmmc_driver = {
 139         .probe = bcmsdh_sdmmc_probe,
 140         .remove = bcmsdh_sdmmc_remove,
 141         .name = "brcmfmac",
 142         .id_table = bcmsdh_sdmmc_ids,
 143 };
 144
 145 struct sdos_info {
 146         sdioh_info_t *sd;
 147         spinlock_t lock;
 148 };
 149
 150 int sdioh_sdmmc_osinit(sdioh_info_t *sd)
 151 {
 152         struct sdos_info *sdos;
 153
 154         sdos = kmalloc(sizeof(struct sdos_info), GFP_ATOMIC);
 155         sd->sdos_info = (void *)sdos;
 156         if (sdos == NULL)
 157                 return -ENOMEM;
 158
 159         sdos->sd = sd;
 160         spin_lock_init(&sdos->lock);
 161         return 0;
 162 }
 163
 164 void sdioh_sdmmc_osfree(sdioh_info_t *sd)
 165 {
 166         struct sdos_info *sdos;
 167         ASSERT(sd && sd->sdos_info);
 168
 169         sdos = (struct sdos_info *)sd->sdos_info;
 170         kfree(sdos);
 171 }
 172
 173 /* Interrupt enable/disable */
 174 SDIOH_API_RC sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
 175 {
 176         unsigned long flags;
 177         struct sdos_info *sdos;
 178
 179         sd_trace(("%s: %s\n", __func__, enable ? "Enabling" : "Disabling"));
 180
 181         sdos = (struct sdos_info *)sd->sdos_info;
 182         ASSERT(sdos);
 183
 184 #if !defined(OOB_INTR_ONLY)
 185         if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
 186                 sd_err(("%s: no handler registered, will not enable\n",
 187                         __func__));
 188                 return SDIOH_API_RC_FAIL;
 189         }
 190 #endif                          /* !defined(OOB_INTR_ONLY) */
 191
 192         /* Ensure atomicity for enable/disable calls */
 193         spin_lock_irqsave(&sdos->lock, flags);
 194
 195         sd->client_intr_enabled = enable;
 196         if (enable)
 197                 sdioh_sdmmc_devintr_on(sd);
 198         else
 199                 sdioh_sdmmc_devintr_off(sd);
 200
 201         spin_unlock_irqrestore(&sdos->lock, flags);
 202
 203         return SDIOH_API_RC_SUCCESS;
 204 }
 205
 206 /*
 207  * module init
 208 */
 209 int sdio_function_init(void)
 210 {
 211         int error = 0;
 212         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
 213
 214         gInstance = kzalloc(sizeof(BCMSDH_SDMMC_INSTANCE), GFP_KERNEL);
 215         if (!gInstance)
 216                 return -ENOMEM;
 217
 218         memset(&sdmmc_dev, 0, sizeof(sdmmc_dev));
 219         error = sdio_register_driver(&bcmsdh_sdmmc_driver);
 220
 221         return error;
 222 }
 223
 224 /*
 225  * module cleanup
 226 */
 227 extern int bcmsdh_remove(struct device *dev);
 228 void sdio_function_cleanup(void)
 229 {
 230         sd_trace(("%s Enter\n", __func__));
 231
 232         sdio_unregister_driver(&bcmsdh_sdmmc_driver);
 233
 234         kfree(gInstance);
 235 }