2015年7月17日 星期五

broadcom wifi driver porting

source:
https://community.freescale.com/thread/268362

(1)wifi based on BCM4329 module should be connected to sdio interface on i.mx51.
(2)Compile wifi driver from Broadcom and get a  .ko file(such as dhd.ko).
(3)Open nvram.txt and modify crystal (for example, you use 38.4MHz on hardware,then xtalfreq=38400)
(4)copy dhd.ko to /opt/nfsroot/system/lib/modules
(5)copy sdio-bcm4329-dhd.bin(firmware) and nvram.txt to /opt/nfsroot/system/lib/modules
(6)enter ~/android22/kernel_imx/drivers/mmc/core and find sdio.c file
search whether there is the following function, if not , please search it on website(google)
int sdio_reset_comm(struct mmc_card *card)
{
}
EXPORT_SYMBOL(sido_reset_comm);
(7)configure linux kernel
a. choose Device driver-->Network driver support-->Wireless LAN
    [*]Wireless Lan
    [*]IEEE802.11 For Host AP
       [*]Support downloading firmware images with host AP driver.
       [*] Support for non-volatile firmware download
b.choose Networking support-->Wireless
       [*] old wireless static regulatory definitions
       [*] wireless extensions sysfs files
(8) load driver
#/system/bin/insmod /system/lib/modules/dhd.ko "firmware_path=/system/etc/wifi/sdio-bcm4329-dhd.bin
nvram_path=/system/etc/wifi/nvram.txt"
The following will display :
/#DHD: dongle ram size is set to 294912(orig 294912)
Firmware version = wl0: Aug 11 2010 13:21:15 version 4.218.243.1
eth1: Broadcom Dongle Host Driver mac=00:26:37:a4:f7:e7
Enter wl_control_wl_start
Exited wl_control_wl_start
<-------How to debug wifi on linux command line -------------------->
customer can use "wireless-tools" to debug wifi network. this tool can be downloaded from internet. after compliling, some tools can be got :
frename iwconfig iwevent iwgetid iwlist iwpriv iwspy
**Use "iwconfig" to set AP ( router)
#iwconfig eth1 mode Managed
#iwconfig eth1 key 1234567890
#iwconfig eth1 key open
#iwconfig eth1 essid TP-LINK_432F1A
**Get DHCP Address
#/system/bin/dhcpcd eth1
**Search AP
#iwlist eth1 scan
Cell 01 - Address: 00:23:CD:43:2F:1A
ESSID:"TP-LINK_432F1A"
Cell 02 - Address: 00:23:CD:5D:56:66
ESSID:"TP-LINK_789"
******Customer can also use "wpa_supplicant" to test BCM4329"
A. Configure wpa_supplicant.conf file
Open /opt/nfsroot/system/etc/wifi/wpa_supplicant.conf and add the following lines:
ctrl_interface=DIR=/data/misc/wifi/wpa_supplicant GROUP=wifi
ap_scan=1
update_config=1
B. Run wpa_supplicant service by back
#/system/bin/wpa_supplicant -B -Dwext -ieth1 -c/data/misc/wifi/wpa_supplicant.conf
C. Run wpa_cli to connect AP
# wpa_cli –i eth1
>add_network
0
> set_network 0 ssid "TP-LINK_432F1A"
OK
> set_network 0 wep_key2 "1234567890"
OK
> enable_network 0
OK
>q
****************************For android2.2 based on i.mx51******************************
(1) Adjust init.rc file
At position "prepare for wifi", to add:
（1）在prepare for wifi 处添加目录并修改权限
setprop wifi.interface eth1
mkdir /data/misc/wifi/sockets 0777 wifi wifi
mkdir /data/misc/dhcp 0777 dhcp dhcp
mkdir /data/misc/wifi 0777 wifi wifi
mkdir /system/etc/wifi 0777 wifi wifi
mkdir /data/system/wpa_supplicant 0771 wifi wifi
mkdir /data/misc/wifi/wpa_supplicant 0771 wifi wifi
chmod 0777 /data/misc
chmod 0777 /data/misc/wifi
chmod 0777 /data/misc/wifi/wpa_supplicant.conf
chmod 0771 /system/etc/wifi
chmod 0777 /system/etc/wifi/wpa_supplicant.conf
chmod 0777 /data/system/wpa_supplicant
chmod 0777 /data/misc/wifi/wpa_supplicant
chmod 0777 /system/etc/dhcpcd
chmod 0777 /system/etc/dhcpcd/dhcpcd-hooks
chown wifi wifi data/system/wpa_supplicant
chown wifi wifi /system/etc/wifi/wpa_supplicant.conf
chown dhcp dhcp /data/misc/dhcp
chown wifi wifi /data/misc/wifi/wpa_supplicant
chown dhcp dhcp /system/etc/dhcpcd
chown dhcp dhcp /system/etc/dhcpcd/dhcpcd-hooks
(2)Modify wpa_supplicant and DHCP service
service wpa_supplicant /system/bin/logwrapper /system/bin/wpa_supplicant -d -B -Dwext -ieth1 -c/data/misc/wifi/wpa_supplicant.conf
user root
group wifi inet
socket wpa_eth1 dgram 777 wifi wifi
disable
oneshot
service dhcpcd /system/bin/logwrapper /system/bin/dhcpcd -d -B eth1
user root
group system dhcp wifi
disabled
oneshot
(3)modify HAL for wifi .
Open android/hardware/libhardware_legacy/wifi/wifi.c and add:
#ifndef WIFI_DRIVER_MODULE_PATH
#define WIFI_DRIVER_MODULE_PATH "/system/lib/modules/dhd.ko"
#endif
#ifndef WIFI_DRIVER_MODULE_NAME
#define WIFI_DRIVER_MODULE_NAME "dhd"
#endif
#ifndef WIFI_DRIVER_MODULE_ARG
#define WIFI_DRIVER_MODULE_ARG "firmware_path=/system/etc/wifi/sdio-bcm4329-dhd.bin
nvram_path=/system/etc/wifi/nvram.txt"
#endif
#ifndef WIFI_FIRMWARE_LOADER
#define WIFI_FIRMWARE_LOADER ""
#endif
#define WIFI_TEST_INTERFACE "eth1"
#define WIFI_DRIVER_LOADER_DELAY 5000000
static const char IFACE_DIR[] = "/mywifi";/*这里填一个不存在的文件目录*/
static const char DRIVER_MODULE_NAME[] = WIFI_DRIVER_MODULE_NAME;
static const char DRIVER_MODULE_TAG[] = WIFI_DRIVER_MODULE_NAME " ";
static const char DRIVER_MODULE_PATH[] = WIFI_DRIVER_MODULE_PATH;
static const char DRIVER_MODULE_ARG[] = WIFI_DRIVER_MODULE_ARG;
static const char FIRMWARE_LOADER[] = WIFI_FIRMWARE_LOADER;
static const char DRIVER_PROP_NAME[] = "wlan.driver.status";
static const char SUPPLICANT_NAME[] = "wpa_supplicant";
static const char SUPP_PROP_NAME[] = "init.svc.wpa_supplicant";
static const char SUPP_CONFIG_TEMPLATE[]= "/system/etc/wifi/wpa_supplicant.conf";
static const char SUPP_CONFIG_FILE[] = "/data/misc/wifi/wpa_supplicant.conf";
static const char MODULE_FILE[] = "/proc/modules";
 
(4) modify android/device/fsl/imx51_bbg/BoardConfig.mk file
BOARD_WPA_SUPPLICANT_DRIVER := WEXT
HAVE_CUSTOM_WIFI_DRIVER_2 :=false
WIFI_DRIVER_MODULE_PATH := /system/lib/modules/dhd.ko
WIFI_DRIVER_MODULE_NAME :=”dhd”
WIFI_DRIVER_MODULE_ARG :=”firmware_path=/system/etc/wifi/ sdio-bcm4329-dhd.bin nvram_path=/system/etc/wifi/nvram.txt”
(5)modify frameworks/base/wifi/java/android/net/wifi/WifiStateTracker.java file
mInterfaceName = SystemProperties.get("wifi.interface", "tiwlan0");
>>mInterfaceName = SystemProperties.get("wifi.interface", "eth1");
(6)modify android/build/target/board/generic/system.prop
add : wifi.interfae=eth1
(7)modify android/external/wpa_supplicant/wpa_supplicant.conf :
ctrl_interface=eth1
update_config=1
ap_scan=1
(8) configure AP and delete password .
(9) compile android source code.
(10) That is ok.
 
Maybe it seems very complex , acturally it is not difficult.
 
 
==============
search whether there is the following function, if not , please search it on website(google)
int sdio_reset_comm(struct mmc_card *card)
==>
 
mmc: Add new API call 'sdio_reset_comm' for resetting communication with an SDIO device

Signed-off-by: San Mehat <san@android.com>
drivers/mmc/core/sdio.c
(56 / 0)
12191219
12201220 return err;
12211221}
1222
1223int sdio_reset_comm(struct mmc_card *card)
1224{
1225 struct mmc_host *host = card->host;
1226 u32 ocr;
1227 int err;
1228
1229 printk("%s():\n", __func__);
1230 mmc_go_idle(host);
1231
1232 mmc_set_clock(host, host->f_min);
1233
1234 err = mmc_send_io_op_cond(host, 0, &ocr);
1235 if (err)
1236 goto err;
1237
1238 host->ocr = mmc_select_voltage(host, ocr);
1239 if (!host->ocr) {
1240 err = -EINVAL;
1241 goto err;
1242 }
1243
1244 err = mmc_send_io_op_cond(host, host->ocr, &ocr);
1245 if (err)
1246 goto err;
1247
1248 if (mmc_host_is_spi(host)) {
1249 err = mmc_spi_set_crc(host, use_spi_crc);
1250 if (err)
1251 goto err;
1252 }
1253
1254 if (!mmc_host_is_spi(host)) {
1255 err = mmc_send_relative_addr(host, &card->rca);
1256 if (err)
1257 goto err;
1258 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1259 }
1260 if (!mmc_host_is_spi(host)) {
1261 err = mmc_select_card(card);
1262 if (err)
1263 goto err;
1264 }
1265
1266 mmc_set_clock(host, card->cis.max_dtr);
1267 err = sdio_enable_wide(card);
1268 if (err)
1269 goto err;
1270
1271 return 0;
1272 err:
1273 printk("%s: Error resetting SDIO communications (%d)\n",
1274 mmc_hostname(host), err);
1275 return err;
1276}
1277EXPORT_SYMBOL(sdio_reset_comm);
張貼者： 於

沒有留言:

張貼留言

訂閱： 張貼留言 (Atom)