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RK3588Android12 动态兼容4G模组

news 2026/6/4 6:45:49

平台：RK3588&Android12

内容：实现4G模组的兼容

实现一个固件可以动态兼容多种4G模块，不用换个模块就需要重新打包升级。

主要改系统层，根据模块的PID和VID使用对应的固件

hardware\ril\rild\rild.c ++ #include <dirent.h> ++ static lte_device supported_lte_devices[] = { ++ {"U9507C", "2df3:9d01", "vendor/lib64/libreference-ril-u9507c.so"}, ++ {"E9730C", "2df3:9b33", "vendor/lib64/libreference-ril-e9730c.so"}, ++ {"EC200A", "2c7c:6005", "vendor/lib64/libreference-ril-ec200a.so"}, ++ {"EC2x", "2c7c:0125", "vendor/lib64/libreference-ril-ec2x.so"}, ++ {"SLM770", "2dee:4d57", "vendor/lib64/libreference-ril-slm770.so"}, //vid+pid ++ {"U9300C", "1c9e:9b3c", "vendor/lib64/libreference-ril-u9300c.so"}, ++ //{"N720V5", "2df3:9d01", "vendor/lib64/libec20.so"}, ++ }; ++ ++ int get_rillib_from_id(char *libPath) ++ { ++ char *bus_dir = "/sys/bus/usb/devices"; ++ char *prefix = "PRODUCT="; ++ int idnum; ++ int i = 0; ++ int ret = 0; ++ DIR *dir; ++ struct dirent *next; ++ FILE *fp = NULL; ++ idnum = sizeof(supported_lte_devices) / sizeof(supported_lte_devices[0]); ++ dir = opendir(bus_dir); ++ if (!dir) { ++ return -1; ++ } ++ ++ while ((next = readdir(dir)) != NULL) { ++ char line[256]; ++ char uevent_file[256] = {0}; ++ sprintf(uevent_file, "%s/%s/uevent", bus_dir, next->d_name); ++ //PLOG(DEBUG) << "uevent path:" << uevent_file; ++ RLOGD("**uevent path :=%s**", uevent_file); ++ fp = fopen(uevent_file, "r"); ++ if (NULL == fp) { ++ continue; ++ } ++ ++ while (fgets(line, sizeof(line), fp)) { ++ char *pos = NULL; ++ int product_vid = 0; ++ int product_did = 0; ++ int producd_bcddev = 0; ++ char temp[10] = {0}; ++ pos = strstr(line, prefix); ++ //PLOG(DEBUG) << "line:" << line << ", prefix:" << prefix << "."; ++ if (pos != NULL) { ++ sscanf(pos + 8, "%x/%x/%x", &product_vid, &product_did, &producd_bcddev); ++ ++ sprintf(temp, "%04x:%04x", product_vid, product_did); ++ RLOGD("**found vid:pid =%04x:%04x, temp=%s **", product_vid, product_did, temp); ++ for (i = 0; i < idnum; i++) { ++ if (0 == strncmp(temp, supported_lte_devices[i].vid_pid, 9)) { ++ //PLOG(ERROR) << "found device pid:vid :" << temp; ++ RLOGD("**found device pid:vid :=%s, module_name :=%s**", temp, supported_lte_devices[i].module_name); ++ strcpy(libPath, supported_lte_devices[i].path); ++ ret = 0; ++ fclose(fp); ++ goto ready; ++ } ++ } ++ } ++ } ++ fclose(fp); ++ } ++ ++ ret = -1; ++ ready: ++ closedir(dir); ++ //PLOG(DEBUG) << "wifi detectd return ret:" << ret; ++ RLOGD("**get_rillib_from_id=%d**", ret); ++ return ret; ++ } int main(int argc, char **argv) { ...... if (rilLibPath == NULL) { if ( 0 == property_get(LIB_PATH_PROPERTY, libPath, NULL)) { // No lib sepcified on the command line, and nothing set in props. // Assume "no-ril" case. goto done; } else { rilLibPath = libPath; } } ++ if (get_rillib_from_id(libPath) == 0) ++ rilLibPath = libPath; ++ RLOGD("**RILd rilLibPath=%s**", rilLibPath);

把对应RIL库文件放到 device\rockchip\common\4g_modem\lib64\

再修改4g_modem.mk把文件加载到对应位置，例如：

/device/rockchip/common： --- a/modules/4g_modem.mk +++ b/modules/4g_modem.mk PRODUCT_COPY_FILES += \ $(LOCAL_PATH)/../4g_modem/bin64/dhcpcd:$(TARGET_COPY_OUT_VENDOR)/bin/dhcpcd \ $(LOCAL_PATH)/../4g_modem/lib64/librk-ril.so:$(TARGET_COPY_OUT_VENDOR)/lib64/librk-ril.so \ + $(LOCAL_PATH)/../4g_modem/lib64/libreference-ril-ec2x.so:$(TARGET_COPY_OUT_VENDOR)/lib64/libreference-ril-ec2x.so \ + $(LOCAL_PATH)/../4g_modem/lib64/libreference-ril-ec200a.so:$(TARGET_COPY_OUT_VENDOR)/lib64/libreference-ril-ec200a.so \ + $(LOCAL_PATH)/../4g_modem/lib64/libreference-ril-u9300c.so:$(TARGET_COPY_OUT_VENDOR)/lib64/libreference-ril-u9300c.so

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