一、AP6212模块简介
特性
- 802.11b/g/n single-band radio
- Bluetooth V4.0(HS)with integrated Class 1.5PAandLow Energy (BLE) support
- Concurrent Bluetooth, FM (RX) RDS/RBDS, and WLAN operation
- Simultaneous BT/WLAN receive with single antenna
- WLAN host interface options:-SDIO v2.0—up to 50 MHz clock rate
- BT host digital interface:-UART (up to 4 Mbps)
- FM multiple audio routing options: I2S, PCM, eSCO, A2DP
- IEEECo-existencetechnologies are integrated die solution
- ECI —enhanced coexistence support, ability to coordinate BT SCO transmissions around WLAN receivesA simplified block diagram of the module is depicted in the figure below.
硬件框图
2021-04-14 15-39-39 的屏幕截图.png
二、内核修改
1.修改设备树
/ {
...
wireless-bluetooth {
compatible = "bluetooth-platdata";
uart_rts_gpios = <&gpio1 RK_PC3 GPIO_ACTIVE_LOW>;
pinctrl-names = "default","rts_gpio";
pinctrl-0 = <&uart1_rts>;
pinctrl-1 = <&uart1_rts_gpio>;
// BT,reset_gpio = <&gpio2 RK_PB0 GPIO_ACTIVE_HIGH>;
// BT,wake_gpio = <&gpio0 RK_PA1 GPIO_ACTIVE_HIGH>;
BT,power_gpio = <&gpio2 RK_PB0 GPIO_ACTIVE_HIGH>; // BT_REG_ON
BT,wake_host_irq = <&gpio0 RK_PB3 GPIO_ACTIVE_HIGH>; // BT_WAKE_HOST
status = "okay";
};
wireless-wlan {
compatible = "wlan-platdata";
rockchip,grf = <&grf>;
wifi_chip_type = "ap6212";
sdio_vref = <1800>;
WIFI,host_wake_irq = <&gpio0 RK_PB2 GPIO_ACTIVE_HIGH>; // WIFI_WAKE_HOST
status = "okay";
};
sdio_pwrseq: sdio-pwrseq {
compatible = "mmc-pwrseq-simple";
clocks = <&rk809 1>; // 根据实际电路决定
clock-names = "ext_clock";
pinctrl-names = "default";
pinctrl-0 = <&wifi_enable_h>;
/*
* On the module itself this is one of these (depending
* on the actual card populated):
* - SDIO_RESET_L_WL_REG_ON
* - PDN (power down when low)
*/
reset-gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_LOW>; //WIFI_REG_ON
};
...
};
&sdio {
status = "okay";
clock-frequency = <50000000>;
clock-freq-min-max = <200000 50000000>;
bus-width = <4>;
cap-sd-highspeed;
cap-sdio-irq;
disable-wp;
keep-power-in-suspend;
mmc-pwrseq = <&sdio_pwrseq>;
non-removable;
num-slots = <1>;
pinctrl-names = "default";
sd-uhs-sdr104;
supports-sdio;
};
&pinctrl {
pinctrl-names = "default";
pinctrl-0 = <&chip_enable_h &wifi_wake_host >;
sdio-pwrseq {
wifi_enable_h: wifi-enable-h {
rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>; //WIFI_REG_ON
};
chip_enable_h: chip-enable-h {
rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_output_high>;
};
};
wireless-wlan {
wifi_wake_host: wifi-wake-host {
/* 注意一般Wi-Fi的wake up pin都是高电平触发,所以默认这里要配置为下拉*/
rockchip,pins = <0 RK_PB2 0 &pcfg_pull_down>;
};
};
};
2.修改内核配置
WL_ROCKCHIP=y
2021-04-14 15-55-15 的屏幕截图.png
三、安装驱动并运行
wifi-bt驱动位置为sdk/external/rkwifibt/firmware/
$ tree external/rkwifibt/firmware/ -L 3
external/rkwifibt/firmware/
├── broadcom
│ ├── all
│ │ ├── BT_FIRMWARE
│ │ └── WIFI_FIRMWARE
│ ├── AP6181
│ │ └── wifi
│ ├── AP6212A1
│ │ ├── bt
│ │ └── wifi
│ ├── AP6236
│ │ ├── bt
│ │ └── wifi
│ ├── AP6255
│ │ ├── bt
│ │ └── wifi
│ ├── AP6354
│ │ ├── bt
│ │ └── wifi
│ ├── AW-CM256
│ │ ├── bt
│ │ └── wifi
│ └── AW-NB197
│ ├── bt
│ └── wifi
└── rockchip
└── WIFI_FIRMWARE
├── rk912_fw.bin
├── rk912_patch.bin
└── rk912_patch_cal.bin
在设备烧录新内核后，新建文件夹并安装驱动
$ mkdir -p /system/etc/firmware/
# 安装wifi驱动，实际用的是fw_bcm43438a1.bin
$ scp -r host@ip:/sdkpath/external/rkwifibt/firmware/broadcom/all/WIFI_FIRMWARE/* /system/etc/firmware/
# 安装bt驱动
$ scp -r host@ip:/sdkpath/external/rkwifibt/firmware/broadcom/all/BT_FIRMWARE/* /system/etc/firmware/
sync
# 重启设备
$ sync && reboot
驱动日志
[ 1.518554] Bluetooth: RFCOMM socket layer initialized
[ 1.519067] Bluetooth: RFCOMM ver 1.11
[ 1.519494] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 1.520045] Bluetooth: HIDP socket layer initialized
[ 1.520624] [WLAN_RFKILL]: Enter rfkill_wlan_init
[ 1.521708] [WLAN_RFKILL]: Enter rfkill_wlan_probe
[ 1.522191] [WLAN_RFKILL]: wlan_platdata_parse_dt: wifi_chip_type = ap6212
[ 1.522890] [WLAN_RFKILL]: wlan_platdata_parse_dt: enable wifi power control.
[ 1.523598] [WLAN_RFKILL]: wlan_platdata_parse_dt: wifi power controled by gpio.
[ 1.524312] of_get_named_gpiod_flags: can't parse 'WIFI,poweren_gpio' property of node '/wireless-wlan[0]'
[ 1.524332] of_get_named_gpiod_flags: can't parse 'WIFI,vbat_gpio' property of node '/wireless-wlan[0]'
[ 1.524350] of_get_named_gpiod_flags: can't parse 'WIFI,reset_gpio' property of node '/wireless-wlan[0]'
[ 1.524529] of_get_named_gpiod_flags: parsed 'WIFI,host_wake_irq' property of node '/wireless-wlan[0]' - status (0)
[ 1.524546] [WLAN_RFKILL]: wlan_platdata_parse_dt: get property: WIFI,host_wake_irq = 10, flags = 0.
[ 1.525490] [WLAN_RFKILL]: wlan_platdata_parse_dt: The ref_wifi_clk not found !
[ 1.526219] [WLAN_RFKILL]: rfkill_wlan_probe: init gpio
[ 1.526767] [WLAN_RFKILL]: Exit rfkill_wlan_probe
[ 1.527407] [BT_RFKILL]: Enter rfkill_rk_init
[ 1.529191] of_get_named_gpiod_flags: parsed 'uart_rts_gpios' property of node '/wireless-bluetooth[0]' - status (0)
[ 1.529212] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: uart_rts_gpios = 51.
[ 1.530053] of_get_named_gpiod_flags: parsed 'BT,power_gpio' property of node '/wireless-bluetooth[0]' - status (0)
[ 1.530065] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: BT,power_gpio = 72.
[ 1.530799] of_get_named_gpiod_flags: can't parse 'BT,reset_gpio' property of node '/wireless-bluetooth[0]'
[ 1.530814] of_get_named_gpiod_flags: can't parse 'BT,wake_gpio' property of node '/wireless-bluetooth[0]'
[ 1.530853] of_get_named_gpiod_flags: parsed 'BT,wake_host_irq' property of node '/wireless-bluetooth[0]' - status (0)
[ 1.530864] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: BT,wake_host_irq = 11.
[ 1.531623] [BT_RFKILL]: bluetooth_platdata_parse_dt: clk_get failed!!!.
[ 1.532314] [BT_RFKILL]: Request irq for bt wakeup host
[ 1.532897] [BT_RFKILL]: ** disable irq
[ 1.533530] [BT_RFKILL]: bt_default device registered.
$ dmesg |grep RFKILL
[ 1.520624] [WLAN_RFKILL]: Enter rfkill_wlan_init
[ 1.521708] [WLAN_RFKILL]: Enter rfkill_wlan_probe
[ 1.522191] [WLAN_RFKILL]: wlan_platdata_parse_dt: wifi_chip_type = ap6212
[ 1.522890] [WLAN_RFKILL]: wlan_platdata_parse_dt: enable wifi power control.
[ 1.523598] [WLAN_RFKILL]: wlan_platdata_parse_dt: wifi power controled by gpio.
[ 1.524546] [WLAN_RFKILL]: wlan_platdata_parse_dt: get property: WIFI,host_wake_irq = 10, flags = 0.
[ 1.525490] [WLAN_RFKILL]: wlan_platdata_parse_dt: The ref_wifi_clk not found !
[ 1.526219] [WLAN_RFKILL]: rfkill_wlan_probe: init gpio
[ 1.526767] [WLAN_RFKILL]: Exit rfkill_wlan_probe
[ 1.527407] [BT_RFKILL]: Enter rfkill_rk_init
[ 1.529212] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: uart_rts_gpios = 51.
[ 1.530065] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: BT,power_gpio = 72.
[ 1.530864] [BT_RFKILL]: bluetooth_platdata_parse_dt: get property: BT,wake_host_irq = 11.
[ 1.531623] [BT_RFKILL]: bluetooth_platdata_parse_dt: clk_get failed!!!.
[ 1.532314] [BT_RFKILL]: Request irq for bt wakeup host
[ 1.532897] [BT_RFKILL]: ** disable irq
[ 1.533530] [BT_RFKILL]: bt_default device registered.
[ 1.621325] [WLAN_RFKILL]: rockchip_wifi_get_oob_irq: Enter
[ 1.623931] [WLAN_RFKILL]: rockchip_wifi_power: 1
[ 1.623938] [WLAN_RFKILL]: wifi turn on power. -1
[ 2.004318] [WLAN_RFKILL]: rockchip_wifi_power: 0
[ 2.005584] [WLAN_RFKILL]: wifi shut off power.
[ 4.014704] [BT_RFKILL]: ENABLE UART_RTS
[ 4.115496] [BT_RFKILL]: DISABLE UART_RTS
[ 4.115586] [BT_RFKILL]: bt turn on power
测试wlan0
$ ls /sys/class/net/
docker0 dummy0 eth0 lo usb0 wlan0
$ sudo ifconfig wlan0 up
# 搜索附近wifi
sudo iwlist wlan0 scanning
wlan0 Scan completed :
Cell 01 - Address: F0:92:B4:0B:89:79
ESSID:"ChinaNet-Qwyj"
Mode:Managed
Frequency=2.417 GHz (Channel 2)
Quality:2/5 Signal level:-71 dBm Noise level:0 dBm
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F204104A00011010440001021049000600372A000120
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
Encryption key:on
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
# 显示频道信息
sudo iwlist wlan0 frequen
wlan0 13 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Current Channel:1
# 连接wifi
sudo vim /etc/wpa_supplicant/wpa_supplicant.conf
# 填入以下信息
ctrl_interface=/var/run/wpa_supplicant
update_config=1
country=CN
network={
ssid="4G-WIFI-A16C"
psk="12345678"
}
sudo wpa_supplicant -B -c /etc/wpa_supplicant/wpa_supplicant.conf -i wlan0
Successfully initialized wpa_supplicant
# 动态分配ip
sudo dhclient wlan0
# 断开或停止wifi
sudo killall wpa_supplicant
