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6a3c2aded6
nuttx/drivers/wireless/ieee80211/bcm43xxx/bcmf_driver.c
Xiang Xiao 6a3c2aded6 Fix wait loop and void cast (#24) 
* Simplify EINTR/ECANCEL error handling

1. Add semaphore uninterruptible wait function
2 .Replace semaphore wait loop with a single uninterruptible wait
3. Replace all sem_xxx to nxsem_xxx

* Unify the void cast usage

1. Remove void cast for function because many place ignore the returned value witout cast
2. Replace void cast for variable with UNUSED macro
2020-01-02 10:54:43 -06:00

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/****************************************************************************
* drivers/wireless/bcm43xxx/ieee80211/bcmf_driver.c
*
* Copyright (C) 2017-2018 Gregory Nutt. All rights reserved.
* Author: Simon Piriou <spiriou31@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
#include <string.h>
#include <debug.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <net/ethernet.h>
#include <nuttx/kmalloc.h>
#include <nuttx/signal.h>
#include <nuttx/wdog.h>
#include <nuttx/sdio.h>
#include <nuttx/net/arp.h>
#include <nuttx/wireless/ieee80211/ieee80211.h>
#include "bcmf_driver.h"
#include "bcmf_cdc.h"
#include "bcmf_ioctl.h"
#include "bcmf_utils.h"
#include "bcmf_netdev.h"
#include "bcmf_sdio.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define DOT11_BSSTYPE_ANY 2
#define BCMF_SCAN_TIMEOUT_TICK (5*CLOCKS_PER_SEC)
#define BCMF_AUTH_TIMEOUT_MS 20000 /* was 10000 */
#define BCMF_SCAN_RESULT_SIZE 1024
/* CLM file is cut into pieces of MAX_CHUNK_LEN.
* It is relatively small because dongles (FW) have a small maximum size input
* payload restriction for ioctl's ... something like 1900'ish bytes. So chunk
* len should not exceed 1400 bytes
*
* NOTE: CONFIG_NET_ETH_PKTSIZE is the MTU plus the size of the Ethernet
* header (14 bytes).
*/
#ifdef CONFIG_IEEE80211_BROADCOM_FWFILES /* REVISIT */
# define MAX_CHUNK_LEN (100)
#else
# define MAX_CHUNK_LEN \
(CONFIG_NET_ETH_PKTSIZE > 1514 ? 1400 : CONFIG_NET_ETH_PKTSIZE - 114)
#endif
/* Helper to get iw_event size */
#define BCMF_IW_EVENT_SIZE(field) \
(offsetof(struct iw_event, u) + sizeof(((union iwreq_data *)0)->field))
/* CLM blob macros */
#define DLOAD_HANDLER_VER 1 /* Downloader version */
#define DLOAD_FLAG_VER_MASK 0xf000 /* Downloader version mask */
#define DLOAD_FLAG_VER_SHIFT 12 /* Downloader version shift */
#define DL_CRC_NOT_INUSE 0x0001
#define DL_BEGIN 0x0002
#define DL_END 0x0004
/****************************************************************************
* Private Types
****************************************************************************/
/* CLM blob download head */
struct wl_dload_data
{
uint16_t flag;
uint16_t dload_type;
uint32_t len;
uint32_t crc;
};
/* AP scan state machine status */
enum
{
BCMF_SCAN_TIMEOUT = 0,
BCMF_SCAN_DISABLED,
BCMF_SCAN_RUN,
BCMF_SCAN_DONE
};
/* Generic download types & flags */
enum
{
DL_TYPE_UCODE = 1,
DL_TYPE_CLM = 2
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static FAR struct bcmf_dev_s *bcmf_allocate_device(void);
static void bcmf_free_device(FAR struct bcmf_dev_s *priv);
static int bcmf_driver_initialize(FAR struct bcmf_dev_s *priv);
#ifdef CONFIG_IEEE80211_BROADCOM_HAVE_CLM
static int bcmf_driver_download_clm(FAR struct bcmf_dev_s *priv);
#endif
/* FIXME only for debug purpose */
static void bcmf_wl_default_event_handler(FAR struct bcmf_dev_s *priv,
struct bcmf_event_s *event, unsigned int len);
static void bcmf_wl_radio_event_handler(FAR struct bcmf_dev_s *priv,
struct bcmf_event_s *event, unsigned int len);
static void bcmf_wl_scan_event_handler(FAR struct bcmf_dev_s *priv,
struct bcmf_event_s *event, unsigned int len);
static void bcmf_wl_auth_event_handler(FAR struct bcmf_dev_s *priv,
struct bcmf_event_s *event, unsigned int len);
static int bcmf_wl_get_interface(FAR struct bcmf_dev_s *priv,
struct iwreq *iwr);
/****************************************************************************
* Private Functions
****************************************************************************/
FAR struct bcmf_dev_s *bcmf_allocate_device(void)
{
int ret;
FAR struct bcmf_dev_s *priv;
/* Allocate a bcmf device structure */
priv = (FAR struct bcmf_dev_s *)kmm_malloc(sizeof(*priv));
if (!priv)
{
return NULL;
}
/* Initialize bcmf device structure */
memset(priv, 0, sizeof(*priv));
/* Init control frames mutex and timeout signal */
if ((ret = nxsem_init(&priv->control_mutex, 0, 1)) != OK)
{
goto exit_free_priv;
}
if ((ret = nxsem_init(&priv->control_timeout, 0, 0)) != OK)
{
goto exit_free_priv;
}
if ((ret = nxsem_setprotocol(&priv->control_timeout, SEM_PRIO_NONE)) != OK)
{
goto exit_free_priv;
}
/* Init authentication signal semaphore */
if ((ret = nxsem_init(&priv->auth_signal, 0, 0)) != OK)
{
goto exit_free_priv;
}
if ((ret = nxsem_setprotocol(&priv->auth_signal, SEM_PRIO_NONE)) != OK)
{
goto exit_free_priv;
}
/* Init scan timeout timer */
priv->scan_status = BCMF_SCAN_DISABLED;
priv->scan_timeout = wd_create();
if (!priv->scan_timeout)
{
ret = -ENOMEM;
goto exit_free_priv;
}
return priv;
exit_free_priv:
kmm_free(priv);
return NULL;
}
void bcmf_free_device(FAR struct bcmf_dev_s *priv)
{
/* TODO deinitialize device structures */
kmm_free(priv);
}
int bcmf_wl_set_mac_address(FAR struct bcmf_dev_s *priv, struct ifreq *req)
{
int ret;
uint32_t out_len = IFHWADDRLEN;
ret = bcmf_cdc_iovar_request(priv, CHIP_STA_INTERFACE, true,
IOVAR_STR_CUR_ETHERADDR,
(uint8_t *)req->ifr_hwaddr.sa_data,
&out_len);
if (ret != OK)
{
return ret;
}
wlinfo("MAC address updated %02X:%02X:%02X:%02X:%02X:%02X\n",
req->ifr_hwaddr.sa_data[0], req->ifr_hwaddr.sa_data[1],
req->ifr_hwaddr.sa_data[2], req->ifr_hwaddr.sa_data[3],
req->ifr_hwaddr.sa_data[4], req->ifr_hwaddr.sa_data[5]);
memcpy(priv->bc_dev.d_mac.ether.ether_addr_octet,
req->ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
return OK;
}
#ifdef CONFIG_IEEE80211_BROADCOM_HAVE_CLM
#ifdef CONFIG_IEEE80211_BROADCOM_FWFILES
int bcmf_driver_download_clm(FAR struct bcmf_dev_s *priv)
{
FAR uint8_t *downloadbuff;
struct file finfo;
ssize_t nread;
uint16_t dl_flag;
unsigned int datalen = 7222;
int ret;
wlinfo("Download %d bytes\n", datalen);
ret = file_open(&finfo, CONFIG_IEEE80211_BROADCOM_FWCLMNAME,
O_RDONLY | O_BINARY);
if (ret < 0)
{
wlerr("ERROR: Failed to open the FILE MTD file \n", ret);
return ret;
}
/* Divide CLM blob into chunks */
downloadbuff = kmm_malloc(sizeof(struct wl_dload_data) + MAX_CHUNK_LEN);
if (downloadbuff == NULL)
{
wlerr("ERROR: Failed allocate memory for CLM data\n");
ret = -ENOMEM;
goto errout_with_file;
}
dl_flag = DL_BEGIN;
do
{
FAR struct wl_dload_data *dlhead;
unsigned int chunk_len;
uint32_t out_len;
chunk_len = datalen >= MAX_CHUNK_LEN ? MAX_CHUNK_LEN : datalen;
nread = file_read(&finfo, downloadbuff + sizeof(struct wl_dload_data),
chunk_len);
if (nread < 0)
{
ret = (int)nread;
wlerr("ERROR: Failed to read CLM data: %d\n", ret);
goto errout_with_buffer;
}
wlinfo("Read blob %d bytes on %d\n", nread, chunk_len);
datalen -= chunk_len;
if (datalen <= 0)
{
dl_flag |= DL_END;
}
/* CLM header */
dlhead = (struct wl_dload_data *)downloadbuff;
dlhead->flag = (DLOAD_HANDLER_VER << DLOAD_FLAG_VER_SHIFT) | dl_flag;
dlhead->dload_type = DL_TYPE_CLM;
dlhead->len = chunk_len;
dlhead->crc = 0;
out_len = chunk_len + sizeof(struct wl_dload_data);
out_len = (out_len + 7) & ~0x7;
ret = bcmf_cdc_iovar_request(priv, CHIP_STA_INTERFACE, true,
IOVAR_STR_CLMLOAD, downloadbuff,
&out_len);
wlinfo("datalen=%d, ret=%d\n", datalen, ret);
dl_flag &= (uint16_t)~DL_BEGIN;
}
while ((datalen > 0) && (ret == OK));
wlinfo("Done writing blob");
errout_with_buffer:
kmm_free(downloadbuff);
errout_with_file:
file_close(&finfo);
return ret;
}
#else
int bcmf_driver_download_clm(FAR struct bcmf_dev_s *priv)
{
FAR struct bcmf_sdio_dev_s *sbus = (FAR struct bcmf_sdio_dev_s *)priv->bus;
FAR uint8_t *srcbuff = sbus->chip->clm_blob_image;
FAR uint8_t *downloadbuff;
unsigned int datalen = *sbus->chip->clm_blob_image_size;
uint16_t dl_flag;
int ret = 0;
if (srcbuff == NULL || datalen <= 0)
{
wlinfo("Skip CLM blob...\n");
return 0;
}
else
{
wlinfo("Download %d bytes @ 0x%08x\n", datalen, srcbuff);
}
/* Divide CLM blob into chunks */
downloadbuff = kmm_malloc(sizeof(struct wl_dload_data) + MAX_CHUNK_LEN);
if (!downloadbuff)
{
wlerr("No memory for CLM data\n");
return -ENOMEM;
}
dl_flag = DL_BEGIN;
do
{
FAR struct wl_dload_data *dlhead;
unsigned int chunk_len = datalen;
uint32_t out_len;
chunk_len = datalen >= MAX_CHUNK_LEN ? MAX_CHUNK_LEN : datalen;
memcpy(downloadbuff + sizeof(struct wl_dload_data), srcbuff, chunk_len);
datalen -= chunk_len;
srcbuff += chunk_len;
if (datalen <= 0)
{
dl_flag |= DL_END;
}
/* CLM header */
dlhead = (struct wl_dload_data *)downloadbuff;
dlhead->flag = (DLOAD_HANDLER_VER << DLOAD_FLAG_VER_SHIFT) | dl_flag;
dlhead->dload_type = DL_TYPE_CLM;
dlhead->len = chunk_len;
dlhead->crc = 0;
out_len = chunk_len + sizeof(struct wl_dload_data);
out_len = (out_len + 7) & ~0x7;
ret = bcmf_cdc_iovar_request(priv, CHIP_STA_INTERFACE, true,
IOVAR_STR_CLMLOAD, downloadbuff,
&out_len);
dl_flag &= (uint16_t)~DL_BEGIN;
}
while ((datalen > 0) && (ret == OK));
kmm_free(downloadbuff);
return ret;
}
#endif
#endif /* CONFIG_IEEE80211_BROADCOM_HAVE_CLM */
int bcmf_driver_initialize(FAR struct bcmf_dev_s *priv)
{
int ret;
uint32_t out_len;
uint32_t value;
uint8_t tmp_buf[64];
int interface = CHIP_STA_INTERFACE;
#ifdef CONFIG_IEEE80211_BROADCOM_HAVE_CLM
/* Download CLM blob if needed */
ret = bcmf_driver_download_clm(priv);
if (ret != OK)
{
return -EIO;
}
#endif
/* Disable TX Gloming feature */
out_len = 4;
*(FAR uint32_t *)tmp_buf = 0;
ret = bcmf_cdc_iovar_request(priv, interface, true,
IOVAR_STR_TX_GLOM, tmp_buf,
&out_len);
if (ret != OK)
{
return -EIO;
}
/* FIXME disable power save mode */
out_len = 4;
value = 0;
ret = bcmf_cdc_ioctl(priv, interface, true, WLC_SET_PM,
(uint8_t *)&value, &out_len);
if (ret != OK)
{
return ret;
}
/* Set the GMode to auto */
out_len = 4;
value = GMODE_AUTO;
ret = bcmf_cdc_ioctl(priv, interface, true, WLC_SET_GMODE,
(uint8_t *)&value, &out_len);
if (ret != OK)
{
return ret;
}
/* TODO configure roaming if needed. Disable for now */
out_len = 4;
value = 1;
ret = bcmf_cdc_iovar_request(priv, interface, true,
IOVAR_STR_ROAM_OFF,
(FAR uint8_t *)&value,
&out_len);
/* TODO configure EAPOL version to default */
out_len = 8;
((FAR uint32_t *)tmp_buf)[0] = interface;
((FAR uint32_t *)tmp_buf)[1] = (uint32_t)-1;
if (bcmf_cdc_iovar_request(priv, interface, true,
"bsscfg:"IOVAR_STR_SUP_WPA2_EAPVER, tmp_buf,
&out_len))
{
return -EIO;
}
/* Query firmware version string */
out_len = sizeof(tmp_buf);
ret = bcmf_cdc_iovar_request(priv, interface, false,
IOVAR_STR_VERSION, tmp_buf,
&out_len);
if (ret != OK)
{
return -EIO;
}
tmp_buf[sizeof(tmp_buf)-1] = 0;
/* Remove line feed */
out_len = strlen((char *)tmp_buf);
if (out_len > 0 && tmp_buf[out_len - 1] == '\n')
{
tmp_buf[out_len - 1] = 0;
}
wlinfo("fw version <%s>\n", tmp_buf);
/* FIXME Configure event mask to enable all asynchronous events */
for (ret = 0; ret < BCMF_EVENT_COUNT; ret++)
{
bcmf_event_register(priv, bcmf_wl_default_event_handler, ret);
}
/* Register radio event */
bcmf_event_register(priv, bcmf_wl_radio_event_handler, WLC_E_RADIO);
/* Register AP scan event */
bcmf_event_register(priv, bcmf_wl_scan_event_handler, WLC_E_ESCAN_RESULT);
/* Register authentication related events */
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_ASSOC_IND_NDIS);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_AUTH);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_ASSOC);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_LINK);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_PSK_SUP);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_JOIN);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_SET_SSID);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_DEAUTH_IND);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_DISASSOC);
bcmf_event_register(priv, bcmf_wl_auth_event_handler, WLC_E_DISASSOC_IND);
if (bcmf_event_push_config(priv))
{
return -EIO;
}
/* Register network driver */
return bcmf_netdev_register(priv);
}
void bcmf_wl_default_event_handler(FAR struct bcmf_dev_s *priv,
struct bcmf_event_s *event, unsigned int len)
{
wlinfo("Got event %d from <%s>\n", bcmf_getle32(&event->type),
event->src_name);
}
void bcmf_wl_radio_event_handler(FAR struct bcmf_dev_s *priv,
struct bcmf_event_s *event, unsigned int len)
{
}
void bcmf_wl_auth_event_handler(FAR struct bcmf_dev_s *priv,
struct bcmf_event_s *event, unsigned int len)
{
uint32_t type;
uint32_t status;
type = bcmf_getle32(&event->type);
status = bcmf_getle32(&event->status);
wlinfo("Got auth event %d from <%s>\n", type, event->src_name);
bcmf_hexdump((uint8_t *)event, len, (unsigned long)event);
if (type == WLC_E_SET_SSID && status == WLC_E_STATUS_SUCCESS)
{
/* Auth complete */
priv->auth_status = OK;
nxsem_post(&priv->auth_signal);
}
}
/* bcmf_wl_scan_event_handler must run at high priority else
* race condition may occur on priv->scan_result field
*/
void bcmf_wl_scan_event_handler(FAR struct bcmf_dev_s *priv,
struct bcmf_event_s *event, unsigned int len)
{
uint32_t status;
uint32_t event_len;
struct wl_escan_result *result;
struct wl_bss_info *bss;
unsigned int bss_info_len;
unsigned int escan_result_len;
unsigned int bss_count = 0;
event_len = len;
if (priv->scan_status < BCMF_SCAN_RUN)
{
wlinfo("Got Unexpected scan event\n");
goto exit_invalid_frame;
}
status = bcmf_getle32(&event->status);
escan_result_len = bcmf_getle32(&event->len);
len -= sizeof(struct bcmf_event_s);
if (len > escan_result_len)
{
len = escan_result_len;
}
if (len == sizeof(struct wl_escan_result) - sizeof(struct wl_bss_info))
{
/* Nothing to process, may be scan done event */
goto wl_escan_result_processed;
}
if (len < sizeof(struct wl_escan_result))
{
goto exit_invalid_frame;
}
/* Process escan result payload */
result = (struct wl_escan_result *)&event[1];
if (len < result->buflen || result->buflen < sizeof(struct wl_escan_result))
{
goto exit_invalid_frame;
}
/* wl_escan_result structure cointains a wl_bss_info field */
len = result->buflen - sizeof(struct wl_escan_result)
+ sizeof(struct wl_bss_info);
/* Process bss_infos */
bss = result->bss_info;
while (len > 0 && bss_count < result->bss_count)
{
struct iw_event *iwe;
unsigned int result_size;
size_t essid_len;
size_t essid_len_aligned;
uint8_t *ie_buffer;
unsigned int ie_offset;
unsigned int check_offset;
result_size = BCMF_SCAN_RESULT_SIZE - priv->scan_result_size;
bss_info_len = bss->length;
if (len < bss_info_len)
{
wlerr("bss_len error %d %d\n", len, bss_info_len);
goto exit_invalid_frame;
}
/* Append current bss_info to priv->scan_results
* FIXME protect this against race conditions
*/
/* Check if current bss AP is not already detected */
check_offset = 0;
while (priv->scan_result_size - check_offset
>= offsetof(struct iw_event, u))
{
iwe = (struct iw_event *)&priv->scan_result[check_offset];
if (iwe->cmd == SIOCGIWAP)
{
if (memcmp(&iwe->u.ap_addr.sa_data, bss->BSSID.ether_addr_octet,
sizeof(bss->BSSID.ether_addr_octet)) == 0)
{
goto process_next_bss;
}
}
check_offset += iwe->len;
}
wlinfo("Scan result: <%.32s> %02x:%02x:%02x:%02x:%02x:%02x\n", bss->SSID,
bss->BSSID.ether_addr_octet[0], bss->BSSID.ether_addr_octet[1],
bss->BSSID.ether_addr_octet[2], bss->BSSID.ether_addr_octet[3],
bss->BSSID.ether_addr_octet[4], bss->BSSID.ether_addr_octet[5]);
/* Copy BSSID */
if (result_size < BCMF_IW_EVENT_SIZE(ap_addr))
{
goto scan_result_full;
}
iwe = (struct iw_event *)&priv->scan_result[priv->scan_result_size];
iwe->len = BCMF_IW_EVENT_SIZE(ap_addr);
iwe->cmd = SIOCGIWAP;
memcpy(&iwe->u.ap_addr.sa_data, bss->BSSID.ether_addr_octet,
sizeof(bss->BSSID.ether_addr_octet));
iwe->u.ap_addr.sa_family = ARPHRD_ETHER;
priv->scan_result_size += BCMF_IW_EVENT_SIZE(ap_addr);
result_size -= BCMF_IW_EVENT_SIZE(ap_addr);
/* Copy ESSID */
essid_len = min(strlen((const char *)bss->SSID), 32);
essid_len_aligned = (essid_len + 3) & -4;
if (result_size < BCMF_IW_EVENT_SIZE(essid)+essid_len_aligned)
{
goto scan_result_full;
}
iwe = (struct iw_event *)&priv->scan_result[priv->scan_result_size];
iwe->len = BCMF_IW_EVENT_SIZE(essid)+essid_len_aligned;
iwe->cmd = SIOCGIWESSID;
iwe->u.essid.flags = 0;
iwe->u.essid.length = essid_len;
/* Special processing for iw_point, set offset in pointer field */
iwe->u.essid.pointer = (FAR void *)sizeof(iwe->u.essid);
memcpy(&iwe->u.essid + 1, bss->SSID, essid_len);
priv->scan_result_size += BCMF_IW_EVENT_SIZE(essid)+essid_len_aligned;
result_size -= BCMF_IW_EVENT_SIZE(essid)+essid_len_aligned;
/* Copy link quality info */
if (result_size < BCMF_IW_EVENT_SIZE(qual))
{
goto scan_result_full;
}
iwe = (struct iw_event *)&priv->scan_result[priv->scan_result_size];
iwe->len = BCMF_IW_EVENT_SIZE(qual);
iwe->cmd = IWEVQUAL;
iwe->u.qual.qual = bss->SNR;
wlinfo("signal %d %d %d\n", bss->RSSI, bss->phy_noise, bss->SNR);
iwe->u.qual.level = bss->RSSI;
iwe->u.qual.noise = bss->phy_noise;
iwe->u.qual.updated = IW_QUAL_DBM | IW_QUAL_ALL_UPDATED;
priv->scan_result_size += BCMF_IW_EVENT_SIZE(qual);
result_size -= BCMF_IW_EVENT_SIZE(qual);
/* Copy AP mode */
if (result_size < BCMF_IW_EVENT_SIZE(mode))
{
goto scan_result_full;
}
iwe = (struct iw_event *)&priv->scan_result[priv->scan_result_size];
iwe->len = BCMF_IW_EVENT_SIZE(mode);
iwe->cmd = SIOCGIWMODE;
if (bss->capability & DOT11_CAP_ESS)
{
iwe->u.mode = IW_MODE_INFRA;
}
else if (bss->capability & DOT11_CAP_IBSS)
{
iwe->u.mode = IW_MODE_ADHOC;
}
else
{
iwe->u.mode = IW_MODE_AUTO;
}
priv->scan_result_size += BCMF_IW_EVENT_SIZE(mode);
result_size -= BCMF_IW_EVENT_SIZE(mode);
/* Copy AP encryption mode */
if (result_size < BCMF_IW_EVENT_SIZE(data))
{
goto scan_result_full;
}
iwe = (struct iw_event *)&priv->scan_result[priv->scan_result_size];
iwe->len = BCMF_IW_EVENT_SIZE(data);
iwe->cmd = SIOCGIWENCODE;
iwe->u.data.flags = bss->capability & DOT11_CAP_PRIVACY ?
IW_ENCODE_ENABLED | IW_ENCODE_NOKEY :
IW_ENCODE_DISABLED;
iwe->u.data.length = 0;
iwe->u.essid.pointer = NULL;
priv->scan_result_size += BCMF_IW_EVENT_SIZE(data);
result_size -= BCMF_IW_EVENT_SIZE(data);
/* Copy relevant raw IE frame */
if (bss->ie_offset >= bss_info_len ||
bss->ie_length > bss_info_len - bss->ie_offset)
{
goto process_next_bss;
}
ie_offset = 0;
ie_buffer = (uint8_t *)bss + bss->ie_offset;
while (1)
{
size_t ie_frame_size;
if (bss->ie_length - ie_offset < 2)
{
/* Minimum Information element size is 2 bytes */
break;
}
ie_frame_size = ie_buffer[ie_offset + 1] + 2;
if (ie_frame_size > bss->ie_length - ie_offset)
{
/* Entry too big */
break;
}
switch (ie_buffer[ie_offset])
{
case IEEE80211_ELEMID_RSN:
{
size_t ie_frame_size_aligned;
ie_frame_size_aligned = (ie_frame_size + 3) & -4;
wlinfo("found RSN\n");
if (result_size < BCMF_IW_EVENT_SIZE(data) + ie_frame_size_aligned)
{
break;
}
iwe = (struct iw_event *)&priv->scan_result[priv->scan_result_size];
iwe->len = BCMF_IW_EVENT_SIZE(data)+ie_frame_size_aligned;
iwe->cmd = IWEVGENIE;
iwe->u.data.flags = 0;
iwe->u.data.length = ie_frame_size;
iwe->u.data.pointer = (FAR void *)sizeof(iwe->u.data);
memcpy(&iwe->u.data + 1, &ie_buffer[ie_offset], ie_frame_size);
priv->scan_result_size += BCMF_IW_EVENT_SIZE(essid) +
ie_frame_size_aligned;
result_size -= BCMF_IW_EVENT_SIZE(essid) + ie_frame_size_aligned;
break;
}
default:
break;
}
ie_offset += ie_buffer[ie_offset + 1] + 2;
}
goto process_next_bss;
scan_result_full:
/* Continue instead of break to log dropped AP results */
wlerr("No more space in scan_result buffer\n");
process_next_bss:
/* Process next bss_info */
len -= bss_info_len;
bss = (struct wl_bss_info *)((uint8_t *)bss + bss_info_len);
bss_count += 1;
}
wl_escan_result_processed:
if (status == WLC_E_STATUS_PARTIAL)
{
/* More frames to come */
return;
}
if (status != WLC_E_STATUS_SUCCESS)
{
wlerr("Invalid event status %d\n", status);
return;
}
/* Scan done */
wlinfo("escan done event %d %d\n", status, bcmf_getle32(&event->reason));
wd_cancel(priv->scan_timeout);
priv->scan_status = BCMF_SCAN_DONE;
nxsem_post(&priv->control_mutex);
return;
exit_invalid_frame:
wlerr("Invalid scan result event\n");
bcmf_hexdump((uint8_t *)event, event_len, (unsigned long)event);
}
void bcmf_wl_scan_timeout(int argc, wdparm_t arg1, ...)
{
FAR struct bcmf_dev_s *priv = (FAR struct bcmf_dev_s *)arg1;
if (priv->scan_status < BCMF_SCAN_RUN)
{
/* Fatal error, invalid scan status */
wlerr("Unexpected scan timeout\n");
return;
}
wlerr("Scan timeout detected\n");
priv->scan_status = BCMF_SCAN_TIMEOUT;
nxsem_post(&priv->control_mutex);
}
int bcmf_wl_get_interface(FAR struct bcmf_dev_s *priv, struct iwreq *iwr)
{
/* TODO resolve interface using iwr->ifr_name */
return CHIP_STA_INTERFACE;
}
/****************************************************************************
* Public Functions
****************************************************************************/
int bcmf_sdio_initialize(int minor, FAR struct sdio_dev_s *dev)
{
int ret;
FAR struct bcmf_dev_s *priv;
wlinfo("minor: %d\n", minor);
priv = bcmf_allocate_device();
if (!priv)
{
return -ENOMEM;
}
/* Init sdio bus */
ret = bcmf_bus_sdio_initialize(priv, minor, dev);
if (ret != OK)
{
ret = -EIO;
goto exit_free_device;
}
/* Bus initialized, register network driver */
return bcmf_driver_initialize(priv);
exit_free_device:
bcmf_free_device(priv);
return ret;
}
int bcmf_wl_enable(FAR struct bcmf_dev_s *priv, bool enable)
{
int ret;
uint32_t out_len;
/* TODO chek device state */
out_len = 0;
ret = bcmf_cdc_ioctl(priv, CHIP_STA_INTERFACE, true,
enable ? WLC_UP : WLC_DOWN, NULL, &out_len);
/* TODO wait for WLC_E_RADIO event */
nxsig_usleep(3000);
if (ret == OK)
{
/* TODO update device state */
}
return ret;
}
int bcmf_wl_start_scan(FAR struct bcmf_dev_s *priv, struct iwreq *iwr)
{
int ret;
uint32_t out_len;
uint32_t value;
int interface;
struct iw_scan_req *req;
struct wl_escan_params scan_params;
interface = bcmf_wl_get_interface(priv, iwr);
if (interface < 0)
{
return -EINVAL;
}
memset(&scan_params, 0, sizeof(scan_params));
scan_params.version = ESCAN_REQ_VERSION;
scan_params.action = WL_SCAN_ACTION_START;
scan_params.sync_id = 0xabcd; /* Not used for now */
memset(&scan_params.params.bssid, 0xff,
sizeof(scan_params.params.bssid));
scan_params.params.bss_type = DOT11_BSSTYPE_ANY;
scan_params.params.nprobes = -1;
scan_params.params.active_time = -1;
scan_params.params.passive_time = -1;
scan_params.params.home_time = -1;
scan_params.params.channel_num = 0;
if (iwr->u.data.pointer && iwr->u.data.length >= sizeof(*req))
{
req = (struct iw_scan_req *)iwr->u.data.pointer;
memcpy(&scan_params.params.bssid, req->bssid.sa_data,
sizeof(scan_params.params.bssid));
scan_params.params.scan_type =
req->scan_type == IW_SCAN_TYPE_ACTIVE ? 0:1;
if (iwr->u.data.flags & IW_SCAN_THIS_ESSID &&
req->essid_len < sizeof(scan_params.params.ssid.SSID))
{
/* Scan specific ESSID */
memcpy(scan_params.params.ssid.SSID, req->essid, req->essid_len);
scan_params.params.ssid.SSID_len = req->essid_len;
}
}
else
{
/* Default scan parameters */
wlinfo("Use default scan parameters\n");
memset(&scan_params.params.bssid, 0xff,
sizeof(scan_params.params.bssid));
scan_params.params.scan_type = 0; /* Active scan */
}
/* Set active scan mode */
value = scan_params.params.scan_type;
out_len = 4;
if (bcmf_cdc_ioctl(priv, CHIP_STA_INTERFACE, true,
WLC_SET_PASSIVE_SCAN, (uint8_t *)&value, &out_len))
{
ret = -EIO;
goto exit_failed;
}
/* Lock control_mutex semaphore */
if ((ret = nxsem_wait(&priv->control_mutex)) < 0)
{
goto exit_failed;
}
/* Allocate buffer to store scan result */
if (priv->scan_result == NULL)
{
priv->scan_result = kmm_malloc(BCMF_SCAN_RESULT_SIZE);
if (priv->scan_result == NULL)
{
wlerr("Cannot allocate result buffer\n");
ret = -ENOMEM;
goto exit_sem_post;
}
}
wlinfo("start scan\n");
priv->scan_result_size = 0;
priv->scan_status = BCMF_SCAN_RUN;
out_len = sizeof(scan_params);
if (bcmf_cdc_iovar_request_unsafe(priv, CHIP_STA_INTERFACE, true,
IOVAR_STR_ESCAN, (uint8_t *)&scan_params,
&out_len))
{
ret = -EIO;
goto exit_sem_post;
}
/* Start scan_timeout timer */
wd_start(priv->scan_timeout, BCMF_SCAN_TIMEOUT_TICK,
bcmf_wl_scan_timeout, 1, (wdparm_t)priv);
return OK;
exit_sem_post:
priv->scan_status = BCMF_SCAN_DISABLED;
nxsem_post(&priv->control_mutex);
exit_failed:
wlinfo("Failed\n");
return ret;
}
int bcmf_wl_get_scan_results(FAR struct bcmf_dev_s *priv, struct iwreq *iwr)
{
int ret = OK;
if (priv->scan_status == BCMF_SCAN_RUN)
{
ret = -EAGAIN;
goto exit_failed;
}
if (priv->scan_status != BCMF_SCAN_DONE)
{
ret = -EINVAL;
goto exit_failed;
}
/* Lock control_mutex semaphore to avoid race condition */
if ((ret = nxsem_wait(&priv->control_mutex)) < 0)
{
goto exit_failed;
}
if (!priv->scan_result)
{
/* Result have already been requested */
ret = OK;
iwr->u.data.length = 0;
goto exit_sem_post;
}
if (iwr->u.data.pointer == NULL ||
iwr->u.data.length < priv->scan_result_size)
{
/* Stat request, return scan_result_size */
ret = -E2BIG;
iwr->u.data.pointer = NULL;
iwr->u.data.length = priv->scan_result_size;
goto exit_sem_post;
}
if (priv->scan_result_size <= 0)
{
ret = OK;
iwr->u.data.length = 0;
goto exit_free_buffer;
}
/* Copy result to user buffer */
if (iwr->u.data.length > priv->scan_result_size)
{
iwr->u.data.length = priv->scan_result_size;
}
memcpy(iwr->u.data.pointer, priv->scan_result, iwr->u.data.length);
exit_free_buffer:
/* Free scan result buffer */
kmm_free(priv->scan_result);
priv->scan_result = NULL;
priv->scan_result_size = 0;
exit_sem_post:
nxsem_post(&priv->control_mutex);
exit_failed:
if (ret < 0)
{
iwr->u.data.length = 0;
}
return ret;
}
int bcmf_wl_set_auth_param(FAR struct bcmf_dev_s *priv, struct iwreq *iwr)
{
int ret = -ENOSYS;
int interface;
uint32_t out_len;
interface = bcmf_wl_get_interface(priv, iwr);
if (interface < 0)
{
return -EINVAL;
}
switch (iwr->u.param.flags & IW_AUTH_INDEX)
{
case IW_AUTH_WPA_VERSION:
{
uint32_t wpa_version[2];
uint32_t auth_mode;
switch (iwr->u.param.value)
{
case IW_AUTH_WPA_VERSION_DISABLED:
wpa_version[1] = 0;
auth_mode = WPA_AUTH_DISABLED;
break;
case IW_AUTH_WPA_VERSION_WPA:
wpa_version[1] = 1;
auth_mode = WPA_AUTH_PSK;
break;
case IW_AUTH_WPA_VERSION_WPA2:
wpa_version[1] = 1;
auth_mode = WPA2_AUTH_PSK;
break;
default:
wlerr("Invalid wpa version %d\n", iwr->u.param.value);
return -EINVAL;
}
out_len = 8;
wpa_version[0] = interface;
if (bcmf_cdc_iovar_request(priv, interface, true,
"bsscfg:"IOVAR_STR_SUP_WPA,
(uint8_t *)wpa_version,
&out_len))
{
return -EIO;
}
out_len = 4;
if (bcmf_cdc_ioctl(priv, interface, true, WLC_SET_WPA_AUTH,
(uint8_t *)&auth_mode, &out_len))
{
return -EIO;
}
}
return OK;
case IW_AUTH_CIPHER_PAIRWISE:
case IW_AUTH_CIPHER_GROUP:
{
uint32_t cipher_mode;
uint32_t wep_auth = 0;
switch (iwr->u.param.value)
{
case IW_AUTH_CIPHER_WEP40:
case IW_AUTH_CIPHER_WEP104:
cipher_mode = WEP_ENABLED;
wep_auth = 1;
break;
case IW_AUTH_CIPHER_TKIP:
cipher_mode = TKIP_ENABLED;
break;
case IW_AUTH_CIPHER_CCMP:
cipher_mode = AES_ENABLED;
break;
default:
wlerr("Invalid cipher mode %d\n", iwr->u.param.value);
return -EINVAL;
}
out_len = 4;
if (bcmf_cdc_ioctl(priv, interface, true,
WLC_SET_WSEC, (uint8_t *)&cipher_mode, &out_len))
{
return -EIO;
}
/* Set authentication mode */
out_len = 4;
if (bcmf_cdc_ioctl(priv, interface, true,
WLC_SET_AUTH, (uint8_t *)&wep_auth, &out_len))
{
return -EIO;
}
}
return OK;
case IW_AUTH_KEY_MGMT:
case IW_AUTH_TKIP_COUNTERMEASURES:
case IW_AUTH_DROP_UNENCRYPTED:
case IW_AUTH_80211_AUTH_ALG:
case IW_AUTH_WPA_ENABLED:
case IW_AUTH_RX_UNENCRYPTED_EAPOL:
case IW_AUTH_ROAMING_CONTROL:
case IW_AUTH_PRIVACY_INVOKED:
default:
wlerr("Unknown cmd %d\n", iwr->u.param.flags);
break;
}
return ret;
}
int bcmf_wl_set_mode(FAR struct bcmf_dev_s *priv, struct iwreq *iwr)
{
int interface;
uint32_t out_len;
uint32_t value;
interface = bcmf_wl_get_interface(priv, iwr);
if (interface < 0)
{
return -EINVAL;
}
out_len = 4;
value = iwr->u.mode == IW_MODE_INFRA ? 1 : 0;
if (bcmf_cdc_ioctl(priv, interface, true,
WLC_SET_INFRA, (uint8_t *)&value, &out_len))
{
return -EIO;
}
return OK;
}
int bcmf_wl_set_encode_ext(FAR struct bcmf_dev_s *priv, struct iwreq *iwr)
{
int interface;
struct iw_encode_ext *ext;
uint32_t out_len;
wsec_pmk_t psk;
interface = bcmf_wl_get_interface(priv, iwr);
if (interface < 0)
{
return -EINVAL;
}
ext = (struct iw_encode_ext *)iwr->u.encoding.pointer;
switch (ext->alg)
{
case IW_ENCODE_ALG_TKIP:
break;
case IW_ENCODE_ALG_CCMP:
break;
case IW_ENCODE_ALG_NONE:
case IW_ENCODE_ALG_WEP:
default:
wlerr("Unknown algo %d\n", ext->alg);
return -EINVAL;
}
memset(&psk, 0, sizeof(wsec_pmk_t));
memcpy(psk.key, &ext->key, ext->key_len);
psk.key_len = ext->key_len;
psk.flags = WSEC_PASSPHRASE;
out_len = sizeof(psk);
return bcmf_cdc_ioctl(priv, interface, true,
WLC_SET_WSEC_PMK, (uint8_t *)&psk, &out_len);
}
int bcmf_wl_set_ssid(FAR struct bcmf_dev_s *priv, struct iwreq *iwr)
{
int ret;
int interface;
uint32_t out_len;
wlc_ssid_t ssid;
interface = bcmf_wl_get_interface(priv, iwr);
if (interface < 0)
{
return -EINVAL;
}
ssid.SSID_len = iwr->u.essid.length;
memcpy(ssid.SSID, iwr->u.essid.pointer, iwr->u.essid.length);
/* Configure AP SSID and trig authentication request */
out_len = sizeof(ssid);
if (bcmf_cdc_ioctl(priv, interface, true,
WLC_SET_SSID, (uint8_t *)&ssid, &out_len))
{
return -EIO;
}
ret = bcmf_sem_wait(&priv->auth_signal, BCMF_AUTH_TIMEOUT_MS);
wlinfo("semwait done ! %d\n", ret);
if (ret < 0)
{
wlerr("Associate request timeout\n");
return ret;
}
switch (priv->auth_status)
{
case OK:
wlinfo("AP Join ok\n");
break;
default:
wlerr("AP join failed %d\n", priv->auth_status);
return -EINVAL;
}
return OK;
}
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