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 <net/cfg80211.h>
  20 #include <defs.h>
  21 #include <brcmu_utils.h>
  22 #include <brcmu_wifi.h>
  23 #include "sdio_host.h"
  24 #include <bcmsdbus.h>           /* bcmsdh to/from specific controller APIs */
  25 #include <sdiovar.h>            /* to get msglevel bit values */
  26
  27 #include <linux/mmc/core.h>
  28 #include <linux/mmc/card.h>
  29 #include <linux/mmc/sdio_func.h>
  30 #include <linux/mmc/sdio_ids.h>
  31
  32 #include "dngl_stats.h"
  33 #include "dhd.h"
  34
  35 #if !defined(SDIO_VENDOR_ID_BROADCOM)
  36 #define SDIO_VENDOR_ID_BROADCOM         0x02d0
  37 #endif                          /* !defined(SDIO_VENDOR_ID_BROADCOM) */
  38
  39 #define SDIO_DEVICE_ID_BROADCOM_DEFAULT 0x0000
  40
  41 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325_SDGWB)
  42 #define SDIO_DEVICE_ID_BROADCOM_4325_SDGWB      0x0492  /* BCM94325SDGWB */
  43 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4325_SDGWB) */
  44 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325)
  45 #define SDIO_DEVICE_ID_BROADCOM_4325    0x0493
  46 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4325) */
  47 #if !defined(SDIO_DEVICE_ID_BROADCOM_4329)
  48 #define SDIO_DEVICE_ID_BROADCOM_4329    0x4329
  49 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
  50 #if !defined(SDIO_DEVICE_ID_BROADCOM_4319)
  51 #define SDIO_DEVICE_ID_BROADCOM_4319    0x4319
  52 #endif          /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
  53
  54 #include <bcmsdh_sdmmc.h>
  55
  56 #include <dhd_dbg.h>
  57 #include <wl_cfg80211.h>
  58
  59 extern void sdioh_sdmmc_devintr_off(sdioh_info_t *sd);
  60 extern void sdioh_sdmmc_devintr_on(sdioh_info_t *sd);
  61
  62 int sdio_function_init(void);
  63 void sdio_function_cleanup(void);
  64
  65 /* module param defaults */
  66 static int clockoverride;
  67
  68 module_param(clockoverride, int, 0644);
  69 MODULE_PARM_DESC(clockoverride, "SDIO card clock override");
  70
  71 PBCMSDH_SDMMC_INSTANCE gInstance;
  72
  73 /* Maximum number of bcmsdh_sdmmc devices supported by driver */
  74 #define BCMSDH_SDMMC_MAX_DEVICES 1
  75
  76 extern int bcmsdh_probe(struct device *dev);
  77 extern int bcmsdh_remove(struct device *dev);
  78 struct device sdmmc_dev;
  79
  80 static int bcmsdh_sdmmc_probe(struct sdio_func *func,
  81                               const struct sdio_device_id *id)
  82 {
  83         int ret = 0;
  84         static struct sdio_func sdio_func_0;
  85         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
  86         sd_trace(("sdio_bcmsdh: func->class=%x\n", func->class));
  87         sd_trace(("sdio_vendor: 0x%04x\n", func->vendor));
  88         sd_trace(("sdio_device: 0x%04x\n", func->device));
  89         sd_trace(("Function#: 0x%04x\n", func->num));
  90
  91         if (func->num == 1) {
  92                 sdio_func_0.num = 0;
  93                 sdio_func_0.card = func->card;
  94                 gInstance->func[0] = &sdio_func_0;
  95                 if (func->device == 0x4) {      /* 4318 */
  96                         gInstance->func[2] = NULL;
  97                         sd_trace(("NIC found, calling bcmsdh_probe...\n"));
  98                         ret = bcmsdh_probe(&sdmmc_dev);
  99                 }
 100         }
 101
 102         gInstance->func[func->num] = func;
 103
 104         if (func->num == 2) {
 105                 wl_cfg80211_sdio_func(func);
 106                 sd_trace(("F2 found, calling bcmsdh_probe...\n"));
 107                 ret = bcmsdh_probe(&sdmmc_dev);
 108         }
 109
 110         return ret;
 111 }
 112
 113 static void bcmsdh_sdmmc_remove(struct sdio_func *func)
 114 {
 115         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
 116         sd_info(("sdio_bcmsdh: func->class=%x\n", func->class));
 117         sd_info(("sdio_vendor: 0x%04x\n", func->vendor));
 118         sd_info(("sdio_device: 0x%04x\n", func->device));
 119         sd_info(("Function#: 0x%04x\n", func->num));
 120
 121         if (func->num == 2) {
 122                 sd_trace(("F2 found, calling bcmsdh_remove...\n"));
 123                 bcmsdh_remove(&sdmmc_dev);
 124         }
 125 }
 126
 127 /* devices we support, null terminated */
 128 static const struct sdio_device_id bcmsdh_sdmmc_ids[] = {
 129         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_DEFAULT)},
 130         {SDIO_DEVICE
 131          (SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325_SDGWB)},
 132         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325)},
 133         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
 134         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4319)},
 135         { /* end: all zeroes */ },
 136 };
 137
 138 MODULE_DEVICE_TABLE(sdio, bcmsdh_sdmmc_ids);
 139
 140 static struct sdio_driver bcmsdh_sdmmc_driver = {
 141         .probe = bcmsdh_sdmmc_probe,
 142         .remove = bcmsdh_sdmmc_remove,
 143         .name = "brcmfmac",
 144         .id_table = bcmsdh_sdmmc_ids,
 145 };
 146
 147 struct sdos_info {
 148         sdioh_info_t *sd;
 149         spinlock_t lock;
 150 };
 151
 152 int sdioh_sdmmc_osinit(sdioh_info_t *sd)
 153 {
 154         struct sdos_info *sdos;
 155
 156         sdos = kmalloc(sizeof(struct sdos_info), GFP_ATOMIC);
 157         sd->sdos_info = (void *)sdos;
 158         if (sdos == NULL)
 159                 return -ENOMEM;
 160
 161         sdos->sd = sd;
 162         spin_lock_init(&sdos->lock);
 163         return 0;
 164 }
 165
 166 void sdioh_sdmmc_osfree(sdioh_info_t *sd)
 167 {
 168         struct sdos_info *sdos;
 169         ASSERT(sd && sd->sdos_info);
 170
 171         sdos = (struct sdos_info *)sd->sdos_info;
 172         kfree(sdos);
 173 }
 174
 175 /* Interrupt enable/disable */
 176 SDIOH_API_RC sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
 177 {
 178         unsigned long flags;
 179         struct sdos_info *sdos;
 180
 181         sd_trace(("%s: %s\n", __func__, enable ? "Enabling" : "Disabling"));
 182
 183         sdos = (struct sdos_info *)sd->sdos_info;
 184         ASSERT(sdos);
 185
 186 #if !defined(OOB_INTR_ONLY)
 187         if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
 188                 sd_err(("%s: no handler registered, will not enable\n",
 189                         __func__));
 190                 return SDIOH_API_RC_FAIL;
 191         }
 192 #endif                          /* !defined(OOB_INTR_ONLY) */
 193
 194         /* Ensure atomicity for enable/disable calls */
 195         spin_lock_irqsave(&sdos->lock, flags);
 196
 197         sd->client_intr_enabled = enable;
 198         if (enable)
 199                 sdioh_sdmmc_devintr_on(sd);
 200         else
 201                 sdioh_sdmmc_devintr_off(sd);
 202
 203         spin_unlock_irqrestore(&sdos->lock, flags);
 204
 205         return SDIOH_API_RC_SUCCESS;
 206 }
 207
 208 /*
 209  * module init
 210 */
 211 int sdio_function_init(void)
 212 {
 213         int error = 0;
 214         sd_trace(("bcmsdh_sdmmc: %s Enter\n", __func__));
 215
 216         gInstance = kzalloc(sizeof(BCMSDH_SDMMC_INSTANCE), GFP_KERNEL);
 217         if (!gInstance)
 218                 return -ENOMEM;
 219
 220         memset(&sdmmc_dev, 0, sizeof(sdmmc_dev));
 221         error = sdio_register_driver(&bcmsdh_sdmmc_driver);
 222
 223         return error;
 224 }
 225
 226 /*
 227  * module cleanup
 228 */
 229 extern int bcmsdh_remove(struct device *dev);
 230 void sdio_function_cleanup(void)
 231 {
 232         sd_trace(("%s Enter\n", __func__));
 233
 234         sdio_unregister_driver(&bcmsdh_sdmmc_driver);
 235
 236         kfree(gInstance);
 237 }