v1.1.0: Complete kernel modules, fix WebUI bugs
Kernel modules fully implemented for kernel 6.6/Tensor G5: - rc_wifi_mon: kprobes kallsyms, bcmdhd iovar monitor/promisc/allmulti, sysfs status at /sys/kernel/rc_wifi_mon/, clean unpatch on unload - rc_shannon_cmd: ioctl interface (AT_CMD, GET_URC, SET_TIMEOUT, GET_STATUS, FLUSH), URC ring buffer (64 entries), modem probe on init - rc_diag_bridge: HDLC decode with CRC-16 validation, FTM ioctl, EFS read/write/stat/unlink, version query, subsystem dispatch - rc_ioctl.h: shared userspace header for all ioctl definitions - All modules handle class_create() API change in kernel 6.4+ WebUI fixes: - Fix malformed WiFi firmware JSON output - Add vonr/vt/apn/nradv to carrier config read endpoint - Fix carrier toggle state loading in frontend - Fix redundant replace in kmod toggle logic Makefile: single-module build (MOD=), make package target uninstall.sh: unload kernel modules before cleanup
This commit is contained in:
sssnake
@@ -1,16 +1,35 @@
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# RadioControl out-of-tree kernel modules
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# Build: make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- KERNEL_DIR=/path/to/kernel
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#
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# Build all:
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# make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- KERNEL_DIR=/path/to/kernel
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#
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# Build specific module:
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# make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- KERNEL_DIR=/path/to/kernel MOD=rc_wifi_mon
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#
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# Target: Pixel 10 Pro Fold (rango), Tensor G5, kernel 6.6.102
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KERNEL_DIR ?= /lib/modules/$(shell uname -r)/build
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obj-$(CONFIG_RC_WIFI_MON) += rc_wifi_mon.o
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obj-$(CONFIG_RC_DIAG_BRIDGE) += rc_diag_bridge.o
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obj-$(CONFIG_RC_SHANNON_CMD) += rc_shannon_cmd.o
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obj-$(CONFIG_RC_DIAG_BRIDGE) += rc_diag_bridge.o
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# Default: build all
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CONFIG_RC_WIFI_MON ?= m
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CONFIG_RC_DIAG_BRIDGE ?= m
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CONFIG_RC_SHANNON_CMD ?= m
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CONFIG_RC_DIAG_BRIDGE ?= m
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# Allow building a single module via MOD=name
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ifdef MOD
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CONFIG_RC_WIFI_MON = n
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CONFIG_RC_SHANNON_CMD = n
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CONFIG_RC_DIAG_BRIDGE = n
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CONFIG_$(shell echo $(MOD) | tr a-z A-Z) = m
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endif
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# Extra compiler flags for Android/ARM64
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ccflags-y += -Wno-unused-function
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ccflags-y += -DCONFIG_RADIOCONTROL
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all:
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$(MAKE) -C $(KERNEL_DIR) M=$(CURDIR) modules
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@@ -20,3 +39,15 @@ clean:
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install:
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$(MAKE) -C $(KERNEL_DIR) M=$(CURDIR) modules_install
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# Copy built modules to the module package directory
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package:
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@mkdir -p ../../common/kmod_out
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@for ko in *.ko; do \
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if [ -f "$$ko" ]; then \
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cp "$$ko" ../../common/kmod_out/; \
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echo "Packaged: $$ko"; \
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fi; \
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done
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.PHONY: all clean install package
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@@ -3,11 +3,13 @@
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Out-of-tree kernel modules for enabling hardware features that are
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compiled out of production Android kernels.
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Target: Pixel 10 Pro Fold (rango), Tensor G5, kernel 6.6.102
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## Build Requirements
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- Matching kernel headers for target device
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- Matching kernel headers for target device (kernel 6.6.x)
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- ARM64 cross-compiler (aarch64-linux-gnu-gcc)
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- Device-specific kernel config
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- Device-specific kernel config (CONFIG_KPROBES=y, CONFIG_MODULES=y)
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## Modules
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@@ -16,22 +18,55 @@ Patches the WiFi driver's nl80211 ops table at runtime to allow
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monitor mode and packet injection on chipsets that have the capability
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but disable it in their cfg80211 change_virtual_intf handler.
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Supports:
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- Samsung SCSC/SLSI (slsi_set_monitor_mode — re-enables compiled-out path)
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- Broadcom bcmdhd (patches cfg80211_ops to allow NL80211_IFTYPE_MONITOR)
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- Qualcomm ath11k/ath12k/cnss (typically already supports monitor, but
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this bypasses vendor restrictions)
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Features:
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- Uses kprobes-based kallsyms lookup (works on kernel 5.7+)
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- Patches wiphy->interface_modes bitmask for monitor + OCB
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- Driver-specific firmware iovars for BCM4390 (monitor, promisc, allmulti)
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- SCSC/SLSI MIB patching for Maxwell firmware monitor enable
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- sysfs status at /sys/kernel/rc_wifi_mon/status
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- Clean restore on module unload
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### rc_diag_bridge.ko
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Creates /dev/rc_diag — a simplified userspace interface to the Qualcomm
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DIAG subsystem that bypasses the standard diag driver's filtering.
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Allows reading/writing NV items and sending FTM commands from userspace.
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Supports:
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- Broadcom bcmdhd4390 (BCM4390, primary target)
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- Samsung SCSC/SLSI (Exynos WiFi)
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- Qualcomm ath11k/ath12k/cnss
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### rc_shannon_cmd.ko
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Creates /dev/rc_shannon — direct command interface to Samsung Shannon
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modem bypassing RIL. Allows raw AT command passthrough and IPC message
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injection for band locking, NR mode control, and diagnostic readout.
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Features:
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- Auto-detects modem path (umts_atc0, nr_atc0, umts_router)
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- URC (unsolicited result code) buffering with ring buffer (64 entries)
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- Structured ioctl interface (RC_SHANNON_AT_CMD) with configurable timeout
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- Simple read/write interface for basic use
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- Statistics tracking (cmds sent, bytes tx/rx)
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- Modem connectivity test on load
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- Kernel 6.4+ class_create compatibility
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### rc_diag_bridge.ko
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Creates /dev/rc_diag — a simplified userspace interface to the Qualcomm
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DIAG subsystem. Handles HDLC framing internally.
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Features:
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- NV item read/write (DIAG_NV_READ_F / DIAG_NV_WRITE_F)
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- FTM commands (Factory Test Mode) via subsystem dispatch
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- EFS2 file operations (open, read, write, stat, unlink)
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- Full HDLC encode/decode with CRC-16 CCITT validation
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- Modem version query
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- Raw DIAG passthrough for advanced use
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- Graceful inactive mode when no Qualcomm modem present
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Note: This module is for Qualcomm-baseband devices. On Tensor G5 with
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Shannon 5400, use rc_shannon_cmd instead. rc_diag_bridge will load but
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remain inactive.
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## Shared Header
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`rc_ioctl.h` contains all ioctl definitions for both modules. Include
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this from userspace C code to use the structured command interfaces.
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## Building
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```bash
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@@ -41,14 +76,23 @@ export CROSS_COMPILE=aarch64-linux-gnu-
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export KERNEL_DIR=/path/to/kernel/source
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# Build all modules
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make -C $KERNEL_DIR M=$(pwd) modules
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make
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# Or build individually
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make -C $KERNEL_DIR M=$(pwd) CONFIG_RC_WIFI_MON=m modules
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# Build a single module
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make MOD=rc_wifi_mon
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# Package .ko files for the module zip
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make package
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# Clean
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make clean
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```
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## Runtime Loading
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Modules are loaded by the RadioControl service.sh based on detected chipset.
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KernelSU module overlay places them in /vendor/lib/modules/ or loads
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directly via insmod.
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Modules are loaded by RadioControl's service.sh based on detected chipset.
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The service automatically:
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1. Detects SoC type (Tensor/Exynos/Qualcomm)
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2. Loads the appropriate modules (rc_wifi_mon + rc_shannon_cmd for Tensor)
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3. Skips rc_diag_bridge on non-Qualcomm devices
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4. Verifies module load via /proc/modules
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@@ -16,6 +16,11 @@
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* - FTM commands (subsys 0x4B, subsys_id 11)
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* - Log mask / message mask configuration
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* - Raw DIAG passthrough for advanced use
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*
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* Note: This module is for devices with Qualcomm basebands.
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* On Tensor G5 with Shannon 5400, use rc_shannon_cmd instead.
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*
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* Target: kernel 6.6
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*/
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#include <linux/module.h>
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@@ -30,6 +35,8 @@
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#include <linux/wait.h>
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#include <linux/poll.h>
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#include <linux/ioctl.h>
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#include <linux/delay.h>
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#include <linux/version.h>
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("RadioControl");
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@@ -37,29 +44,58 @@ MODULE_DESCRIPTION("Qualcomm DIAG protocol bridge for NV/EFS/FTM access");
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MODULE_VERSION("1.0");
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#define DEVICE_NAME "rc_diag"
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#define CLASS_NAME "radiocontrol"
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#define CLASS_NAME "radiocontrol_diag"
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#define DIAG_BUF_SIZE 8192
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/* DIAG command codes */
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#define DIAG_NV_READ_F 0x26
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#define DIAG_NV_WRITE_F 0x27
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#define DIAG_STATUS_F 0x0C
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#define DIAG_VERNO_F 0x00
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#define DIAG_SUBSYS_CMD_F 0x4B
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#define DIAG_LOG_CONFIG_F 0x73
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#define DIAG_MSG_CONFIG_F 0x7D
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#define DIAG_EXT_BUILD_ID_F 0x7C
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/* DIAG subsystem IDs */
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#define DIAG_SUBSYS_FTM 11
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#define DIAG_SUBSYS_EFS2 19
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#define DIAG_SUBSYS_PARAMS 37
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#define DIAG_SUBSYS_DIAG 18
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/* EFS2 sub-commands (within DIAG_SUBSYS_EFS2) */
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#define EFS2_DIAG_OPEN 0x01
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#define EFS2_DIAG_CLOSE 0x02
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#define EFS2_DIAG_READ 0x03
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#define EFS2_DIAG_WRITE 0x04
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#define EFS2_DIAG_MKDIR 0x06
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#define EFS2_DIAG_OPENDIR 0x08
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#define EFS2_DIAG_READDIR 0x09
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#define EFS2_DIAG_CLOSEDIR 0x0A
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#define EFS2_DIAG_STAT 0x0D
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#define EFS2_DIAG_UNLINK 0x10
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/* FTM sub-commands */
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#define FTM_SET_MODE 0x00
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#define FTM_SET_CHAN 0x03
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#define FTM_SET_TX_ON 0x06
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#define FTM_SET_TX_OFF 0x07
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#define FTM_SET_PA_RANGE 0x08
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#define FTM_SET_PDM 0x09
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#define FTM_GET_RSSI 0x26
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#define FTM_GET_RX_LEVEL 0x44
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/* IOCTL commands */
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#define RC_DIAG_MAGIC 'D'
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#define RC_DIAG_NV_READ _IOWR(RC_DIAG_MAGIC, 1, struct rc_nv_item)
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#define RC_DIAG_NV_WRITE _IOW(RC_DIAG_MAGIC, 2, struct rc_nv_item)
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#define RC_DIAG_RAW_CMD _IOWR(RC_DIAG_MAGIC, 3, struct rc_diag_raw)
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#define RC_DIAG_FTM_CMD _IOWR(RC_DIAG_MAGIC, 4, struct rc_diag_raw)
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#define RC_DIAG_FTM_CMD _IOWR(RC_DIAG_MAGIC, 4, struct rc_ftm_cmd)
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#define RC_DIAG_EFS_READ _IOWR(RC_DIAG_MAGIC, 5, struct rc_efs_op)
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#define RC_DIAG_EFS_WRITE _IOW(RC_DIAG_MAGIC, 6, struct rc_efs_op)
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#define RC_DIAG_EFS_STAT _IOWR(RC_DIAG_MAGIC, 7, struct rc_efs_op)
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#define RC_DIAG_EFS_UNLINK _IOW(RC_DIAG_MAGIC, 8, struct rc_efs_op)
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#define RC_DIAG_GET_VERSION _IOR(RC_DIAG_MAGIC, 9, struct rc_diag_version)
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/* NV item structure */
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struct rc_nv_item {
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@@ -69,7 +105,7 @@ struct rc_nv_item {
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uint32_t data_len;
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};
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/* Raw DIAG command */
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/* Raw DIAG command — allocated on heap due to size */
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struct rc_diag_raw {
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uint8_t cmd[DIAG_BUF_SIZE];
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uint32_t cmd_len;
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@@ -77,12 +113,34 @@ struct rc_diag_raw {
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uint32_t resp_len;
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};
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/* FTM command */
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struct rc_ftm_cmd {
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uint16_t cmd_id;
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uint16_t data_len;
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uint8_t data[512];
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uint16_t status;
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uint8_t resp[512];
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uint16_t resp_len;
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};
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/* EFS operation */
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struct rc_efs_op {
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char path[256];
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uint8_t data[4096];
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uint32_t data_len;
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int32_t status;
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uint32_t mode; /* file mode for open/mkdir */
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uint32_t offset; /* read/write offset */
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};
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/* Version info */
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struct rc_diag_version {
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char comp_date[12];
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char comp_time[8];
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char rel_date[12];
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char rel_time[8];
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char model[32];
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uint8_t mob_sw_rev;
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};
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/*
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@@ -93,8 +151,8 @@ struct rc_efs_op {
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* Escape: 0x7E -> 0x7D 0x5E, 0x7D -> 0x7D 0x5D
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*/
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#define HDLC_FLAG 0x7E
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#define HDLC_ESC 0x7D
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#define HDLC_FLAG 0x7E
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#define HDLC_ESC 0x7D
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#define HDLC_ESC_MASK 0x20
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static const uint16_t crc16_table[256] = {
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@@ -135,6 +193,7 @@ static const uint16_t crc16_table[256] = {
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static uint16_t crc16_calc(const uint8_t *buf, int len)
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{
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uint16_t crc = 0xFFFF;
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while (len--)
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crc = crc16_table[(crc ^ *buf++) & 0xFF] ^ (crc >> 8);
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return ~crc & 0xFFFF;
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@@ -148,6 +207,9 @@ static int hdlc_encode(const uint8_t *src, int src_len,
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int pos = 0;
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int i;
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if (dst_size < src_len * 2 + 6)
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return -ENOMEM;
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crc = crc16_calc(src, src_len);
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dst[pos++] = HDLC_FLAG;
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@@ -164,6 +226,7 @@ static int hdlc_encode(const uint8_t *src, int src_len,
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/* Append CRC (little-endian) with escaping */
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for (i = 0; i < 2 && pos < dst_size - 2; i++) {
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uint8_t b = (crc >> (i * 8)) & 0xFF;
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if (b == HDLC_FLAG || b == HDLC_ESC) {
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dst[pos++] = HDLC_ESC;
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dst[pos++] = b ^ HDLC_ESC_MASK;
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@@ -176,6 +239,67 @@ static int hdlc_encode(const uint8_t *src, int src_len,
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return pos;
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}
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/*
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* Decode an HDLC-framed DIAG response.
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* Strips framing bytes, unescapes, validates CRC.
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* Returns payload length (without CRC) or negative error.
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*/
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static int hdlc_decode(const uint8_t *src, int src_len,
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uint8_t *dst, int dst_size)
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{
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int pos = 0;
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int i;
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int start = -1, end = -1;
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uint16_t crc_recv, crc_calc;
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/* Find the HDLC frame boundaries */
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for (i = 0; i < src_len; i++) {
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if (src[i] == HDLC_FLAG) {
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if (start < 0) {
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start = i;
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} else {
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end = i;
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break;
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}
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}
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}
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if (start < 0 || end < 0 || end <= start + 1)
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return -EINVAL;
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/* Unescape the payload between the flags */
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for (i = start + 1; i < end && pos < dst_size; i++) {
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if (src[i] == HDLC_ESC) {
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i++;
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if (i >= end)
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return -EINVAL;
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dst[pos++] = src[i] ^ HDLC_ESC_MASK;
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} else if (src[i] == HDLC_FLAG) {
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break;
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} else {
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dst[pos++] = src[i];
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}
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}
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/* Need at least 2 bytes for CRC + 1 byte payload */
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if (pos < 3)
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return -EINVAL;
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/* Last 2 bytes are CRC-16 (little-endian) */
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crc_recv = dst[pos - 2] | (dst[pos - 1] << 8);
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pos -= 2;
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/* Validate CRC */
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crc_calc = crc16_calc(dst, pos);
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if (crc_calc != crc_recv) {
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pr_debug("rc_diag: CRC mismatch: calculated 0x%04x, "
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"received 0x%04x\n", crc_calc, crc_recv);
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return -EIO;
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}
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||||
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return pos;
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}
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||||
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||||
static int major;
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static struct class *rc_class;
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static struct cdev rc_cdev;
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@@ -185,50 +309,134 @@ static DEFINE_MUTEX(diag_mutex);
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static struct file *open_diag_device(void)
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{
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||||
static const char *diag_paths[] = {
|
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"/dev/diag",
|
||||
"/dev/diag_mdm",
|
||||
NULL
|
||||
};
|
||||
struct file *f;
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int i;
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||||
|
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f = filp_open("/dev/diag", O_RDWR | O_NONBLOCK, 0);
|
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if (!IS_ERR(f))
|
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return f;
|
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for (i = 0; diag_paths[i]; i++) {
|
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f = filp_open(diag_paths[i], O_RDWR | O_NONBLOCK, 0);
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if (!IS_ERR(f)) {
|
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pr_info("rc_diag: opened %s\n", diag_paths[i]);
|
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return f;
|
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}
|
||||
}
|
||||
|
||||
pr_info("rc_diag: /dev/diag not available (%ld)\n", PTR_ERR(f));
|
||||
return ERR_PTR(-ENODEV);
|
||||
}
|
||||
|
||||
/*
|
||||
* Send a raw DIAG command (pre-framing) and receive decoded response.
|
||||
*/
|
||||
static int send_diag_cmd(const uint8_t *cmd, int cmd_len,
|
||||
uint8_t *resp, int resp_size)
|
||||
{
|
||||
uint8_t hdlc_buf[DIAG_BUF_SIZE * 2];
|
||||
uint8_t *hdlc_tx;
|
||||
uint8_t *hdlc_rx;
|
||||
loff_t pos = 0;
|
||||
ssize_t written, bytes_read;
|
||||
int hdlc_len;
|
||||
int timeout_ms = 2000;
|
||||
int timeout_ms = 3000;
|
||||
int elapsed = 0;
|
||||
int decoded_len;
|
||||
|
||||
if (!diag_filp || IS_ERR(diag_filp))
|
||||
return -ENODEV;
|
||||
|
||||
hdlc_tx = kmalloc(DIAG_BUF_SIZE * 2, GFP_KERNEL);
|
||||
hdlc_rx = kmalloc(DIAG_BUF_SIZE * 2, GFP_KERNEL);
|
||||
if (!hdlc_tx || !hdlc_rx) {
|
||||
kfree(hdlc_tx);
|
||||
kfree(hdlc_rx);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* HDLC encode the command */
|
||||
hdlc_len = hdlc_encode(cmd, cmd_len, hdlc_buf, sizeof(hdlc_buf));
|
||||
hdlc_len = hdlc_encode(cmd, cmd_len, hdlc_tx, DIAG_BUF_SIZE * 2);
|
||||
if (hdlc_len < 0) {
|
||||
kfree(hdlc_tx);
|
||||
kfree(hdlc_rx);
|
||||
return hdlc_len;
|
||||
}
|
||||
|
||||
/* Send to DIAG */
|
||||
written = kernel_write(diag_filp, hdlc_buf, hdlc_len, &pos);
|
||||
if (written < 0)
|
||||
return written;
|
||||
written = kernel_write(diag_filp, hdlc_tx, hdlc_len, &pos);
|
||||
kfree(hdlc_tx);
|
||||
|
||||
/* Read response */
|
||||
if (written < 0) {
|
||||
kfree(hdlc_rx);
|
||||
return written;
|
||||
}
|
||||
|
||||
/* Read response with timeout */
|
||||
pos = 0;
|
||||
while (elapsed < timeout_ms) {
|
||||
bytes_read = kernel_read(diag_filp, resp, resp_size, &pos);
|
||||
if (bytes_read > 0)
|
||||
return bytes_read;
|
||||
bytes_read = kernel_read(diag_filp, hdlc_rx,
|
||||
DIAG_BUF_SIZE * 2, &pos);
|
||||
if (bytes_read > 0) {
|
||||
/* Decode HDLC frame */
|
||||
decoded_len = hdlc_decode(hdlc_rx, bytes_read,
|
||||
resp, resp_size);
|
||||
kfree(hdlc_rx);
|
||||
|
||||
if (decoded_len < 0) {
|
||||
pr_debug("rc_diag: HDLC decode failed: %d, "
|
||||
"returning raw (%zd bytes)\n",
|
||||
decoded_len, bytes_read);
|
||||
/*
|
||||
* Some DIAG drivers return pre-decoded data.
|
||||
* Fall back to raw copy.
|
||||
*/
|
||||
if (bytes_read <= resp_size) {
|
||||
memcpy(resp, hdlc_rx, bytes_read);
|
||||
return bytes_read;
|
||||
}
|
||||
return decoded_len;
|
||||
}
|
||||
return decoded_len;
|
||||
}
|
||||
msleep(20);
|
||||
elapsed += 20;
|
||||
}
|
||||
|
||||
kfree(hdlc_rx);
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
|
||||
/*
|
||||
* Build and send a subsystem command.
|
||||
* Format: [0x4B] [subsys_id] [sub_cmd LE16] [payload...]
|
||||
*/
|
||||
static int send_subsys_cmd(uint8_t subsys_id, uint16_t sub_cmd,
|
||||
const uint8_t *payload, int payload_len,
|
||||
uint8_t *resp, int resp_size)
|
||||
{
|
||||
uint8_t *cmd;
|
||||
int cmd_len = 4 + payload_len;
|
||||
int ret;
|
||||
|
||||
cmd = kmalloc(cmd_len, GFP_KERNEL);
|
||||
if (!cmd)
|
||||
return -ENOMEM;
|
||||
|
||||
cmd[0] = DIAG_SUBSYS_CMD_F;
|
||||
cmd[1] = subsys_id;
|
||||
cmd[2] = sub_cmd & 0xFF;
|
||||
cmd[3] = (sub_cmd >> 8) & 0xFF;
|
||||
if (payload_len > 0)
|
||||
memcpy(cmd + 4, payload, payload_len);
|
||||
|
||||
ret = send_diag_cmd(cmd, cmd_len, resp, resp_size);
|
||||
kfree(cmd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* IOCTL handlers
|
||||
*/
|
||||
static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
int ret = 0;
|
||||
@@ -253,11 +461,21 @@ static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
|
||||
ret = send_diag_cmd(diag_cmd, 3, diag_resp, sizeof(diag_resp));
|
||||
if (ret > 0) {
|
||||
/* Response: [0x26] [NV_ID] [status] [data...] */
|
||||
nv.status = diag_resp[3] | (diag_resp[4] << 8);
|
||||
nv.data_len = ret > 133 ? 128 : ret - 5;
|
||||
if (nv.data_len > 0)
|
||||
memcpy(nv.data, diag_resp + 5, nv.data_len);
|
||||
/*
|
||||
* Response format:
|
||||
* [0x26] [NV_ID LE 16] [status LE 16] [data...]
|
||||
* Status: 0=OK, 5=inactive, 6=bad_security
|
||||
*/
|
||||
if (ret < 5) {
|
||||
nv.status = 0xFFFF;
|
||||
nv.data_len = 0;
|
||||
} else {
|
||||
nv.status = diag_resp[3] | (diag_resp[4] << 8);
|
||||
nv.data_len = (ret > 133) ? 128 : ret - 5;
|
||||
if (nv.data_len > 0)
|
||||
memcpy(nv.data, diag_resp + 5,
|
||||
nv.data_len);
|
||||
}
|
||||
if (copy_to_user((void __user *)arg, &nv, sizeof(nv)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
@@ -290,7 +508,10 @@ static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
ret = send_diag_cmd(diag_cmd, 3 + nv.data_len,
|
||||
diag_resp, sizeof(diag_resp));
|
||||
if (ret > 0) {
|
||||
nv.status = diag_resp[3] | (diag_resp[4] << 8);
|
||||
if (ret >= 5)
|
||||
nv.status = diag_resp[3] | (diag_resp[4] << 8);
|
||||
else
|
||||
nv.status = 0xFFFF;
|
||||
if (copy_to_user((void __user *)arg, &nv, sizeof(nv)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
@@ -301,8 +522,12 @@ static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
|
||||
case RC_DIAG_RAW_CMD: {
|
||||
struct rc_diag_raw *raw;
|
||||
|
||||
raw = kmalloc(sizeof(*raw), GFP_KERNEL);
|
||||
if (!raw) { ret = -ENOMEM; break; }
|
||||
if (!raw) {
|
||||
ret = -ENOMEM;
|
||||
break;
|
||||
}
|
||||
|
||||
if (copy_from_user(raw, (void __user *)arg, sizeof(*raw))) {
|
||||
kfree(raw);
|
||||
@@ -310,11 +535,18 @@ static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
break;
|
||||
}
|
||||
|
||||
if (raw->cmd_len == 0 || raw->cmd_len > DIAG_BUF_SIZE) {
|
||||
kfree(raw);
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
ret = send_diag_cmd(raw->cmd, raw->cmd_len,
|
||||
raw->resp, sizeof(raw->resp));
|
||||
if (ret > 0) {
|
||||
raw->resp_len = ret;
|
||||
if (copy_to_user((void __user *)arg, raw, sizeof(*raw)))
|
||||
if (copy_to_user((void __user *)arg, raw,
|
||||
sizeof(*raw)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
@@ -323,6 +555,393 @@ static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_DIAG_FTM_CMD: {
|
||||
struct rc_ftm_cmd ftm;
|
||||
uint8_t payload[520];
|
||||
uint8_t resp[256];
|
||||
int payload_len;
|
||||
|
||||
if (copy_from_user(&ftm, (void __user *)arg, sizeof(ftm))) {
|
||||
ret = -EFAULT;
|
||||
break;
|
||||
}
|
||||
|
||||
if (ftm.data_len > sizeof(ftm.data)) {
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* FTM payload format (within subsys command):
|
||||
* [cmd_id LE16] [data_len LE16] [data...]
|
||||
*/
|
||||
payload[0] = ftm.cmd_id & 0xFF;
|
||||
payload[1] = (ftm.cmd_id >> 8) & 0xFF;
|
||||
payload[2] = ftm.data_len & 0xFF;
|
||||
payload[3] = (ftm.data_len >> 8) & 0xFF;
|
||||
if (ftm.data_len > 0)
|
||||
memcpy(payload + 4, ftm.data, ftm.data_len);
|
||||
payload_len = 4 + ftm.data_len;
|
||||
|
||||
ret = send_subsys_cmd(DIAG_SUBSYS_FTM, ftm.cmd_id,
|
||||
payload, payload_len,
|
||||
resp, sizeof(resp));
|
||||
if (ret > 0) {
|
||||
/*
|
||||
* FTM response:
|
||||
* [0x4B] [subsys_id] [cmd LE16] [status LE16] [data...]
|
||||
*/
|
||||
if (ret >= 6)
|
||||
ftm.status = resp[4] | (resp[5] << 8);
|
||||
else
|
||||
ftm.status = 0xFFFF;
|
||||
|
||||
ftm.resp_len = (ret > 6) ? ret - 6 : 0;
|
||||
if (ftm.resp_len > sizeof(ftm.resp))
|
||||
ftm.resp_len = sizeof(ftm.resp);
|
||||
if (ftm.resp_len > 0)
|
||||
memcpy(ftm.resp, resp + 6, ftm.resp_len);
|
||||
|
||||
if (copy_to_user((void __user *)arg, &ftm,
|
||||
sizeof(ftm)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_DIAG_EFS_READ: {
|
||||
struct rc_efs_op *efs;
|
||||
uint8_t open_payload[264];
|
||||
uint8_t read_payload[12];
|
||||
uint8_t resp[4224];
|
||||
int path_len;
|
||||
int32_t fd;
|
||||
|
||||
efs = kmalloc(sizeof(*efs), GFP_KERNEL);
|
||||
if (!efs) {
|
||||
ret = -ENOMEM;
|
||||
break;
|
||||
}
|
||||
|
||||
if (copy_from_user(efs, (void __user *)arg, sizeof(*efs))) {
|
||||
kfree(efs);
|
||||
ret = -EFAULT;
|
||||
break;
|
||||
}
|
||||
|
||||
efs->path[sizeof(efs->path) - 1] = '\0';
|
||||
path_len = strlen(efs->path);
|
||||
|
||||
/*
|
||||
* Step 1: EFS2_DIAG_OPEN
|
||||
* Payload: [oflag LE32] [mode LE32] [path (null-terminated)]
|
||||
*/
|
||||
open_payload[0] = 0x00; /* O_RDONLY */
|
||||
open_payload[1] = 0x00;
|
||||
open_payload[2] = 0x00;
|
||||
open_payload[3] = 0x00;
|
||||
open_payload[4] = 0x00; /* mode (ignored for read) */
|
||||
open_payload[5] = 0x00;
|
||||
open_payload[6] = 0x00;
|
||||
open_payload[7] = 0x00;
|
||||
memcpy(open_payload + 8, efs->path, path_len + 1);
|
||||
|
||||
ret = send_subsys_cmd(DIAG_SUBSYS_EFS2, EFS2_DIAG_OPEN,
|
||||
open_payload, 8 + path_len + 1,
|
||||
resp, sizeof(resp));
|
||||
if (ret < 8) {
|
||||
efs->status = -EIO;
|
||||
goto efs_read_out;
|
||||
}
|
||||
|
||||
/* Response: [hdr 4B] [fd LE32] [errno LE32] */
|
||||
fd = resp[4] | (resp[5] << 8) |
|
||||
(resp[6] << 16) | (resp[7] << 24);
|
||||
|
||||
if (fd < 0) {
|
||||
efs->status = fd;
|
||||
goto efs_read_out;
|
||||
}
|
||||
|
||||
/*
|
||||
* Step 2: EFS2_DIAG_READ
|
||||
* Payload: [fd LE32] [nbytes LE32] [offset LE32]
|
||||
*/
|
||||
read_payload[0] = fd & 0xFF;
|
||||
read_payload[1] = (fd >> 8) & 0xFF;
|
||||
read_payload[2] = (fd >> 16) & 0xFF;
|
||||
read_payload[3] = (fd >> 24) & 0xFF;
|
||||
read_payload[4] = 0x00; /* nbytes = 4096 */
|
||||
read_payload[5] = 0x10;
|
||||
read_payload[6] = 0x00;
|
||||
read_payload[7] = 0x00;
|
||||
read_payload[8] = efs->offset & 0xFF;
|
||||
read_payload[9] = (efs->offset >> 8) & 0xFF;
|
||||
read_payload[10] = (efs->offset >> 16) & 0xFF;
|
||||
read_payload[11] = (efs->offset >> 24) & 0xFF;
|
||||
|
||||
ret = send_subsys_cmd(DIAG_SUBSYS_EFS2, EFS2_DIAG_READ,
|
||||
read_payload, 12, resp, sizeof(resp));
|
||||
if (ret > 12) {
|
||||
/*
|
||||
* Response: [hdr 4B] [fd LE32] [offset LE32]
|
||||
* [bytes_read LE32] [errno LE32] [data...]
|
||||
*/
|
||||
int32_t bytes_read = resp[12] | (resp[13] << 8) |
|
||||
(resp[14] << 16) | (resp[15] << 24);
|
||||
int32_t efs_errno = resp[16] | (resp[17] << 8) |
|
||||
(resp[18] << 16) | (resp[19] << 24);
|
||||
|
||||
if (bytes_read > 0 && efs_errno == 0) {
|
||||
efs->data_len = min_t(uint32_t, bytes_read,
|
||||
sizeof(efs->data));
|
||||
memcpy(efs->data, resp + 20, efs->data_len);
|
||||
efs->status = 0;
|
||||
} else {
|
||||
efs->data_len = 0;
|
||||
efs->status = efs_errno ? -efs_errno : -EIO;
|
||||
}
|
||||
} else {
|
||||
efs->status = -EIO;
|
||||
}
|
||||
|
||||
/*
|
||||
* Step 3: EFS2_DIAG_CLOSE
|
||||
* Payload: [fd LE32]
|
||||
*/
|
||||
send_subsys_cmd(DIAG_SUBSYS_EFS2, EFS2_DIAG_CLOSE,
|
||||
read_payload, 4, resp, sizeof(resp));
|
||||
|
||||
efs_read_out:
|
||||
if (copy_to_user((void __user *)arg, efs, sizeof(*efs)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
kfree(efs);
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_DIAG_EFS_WRITE: {
|
||||
struct rc_efs_op *efs;
|
||||
uint8_t open_payload[264];
|
||||
uint8_t write_payload[4108];
|
||||
uint8_t resp[64];
|
||||
int path_len;
|
||||
int32_t fd;
|
||||
|
||||
efs = kmalloc(sizeof(*efs), GFP_KERNEL);
|
||||
if (!efs) {
|
||||
ret = -ENOMEM;
|
||||
break;
|
||||
}
|
||||
|
||||
if (copy_from_user(efs, (void __user *)arg, sizeof(*efs))) {
|
||||
kfree(efs);
|
||||
ret = -EFAULT;
|
||||
break;
|
||||
}
|
||||
|
||||
efs->path[sizeof(efs->path) - 1] = '\0';
|
||||
path_len = strlen(efs->path);
|
||||
|
||||
if (efs->data_len > sizeof(efs->data)) {
|
||||
kfree(efs);
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Step 1: EFS2_DIAG_OPEN (O_WRONLY | O_CREAT | O_TRUNC)
|
||||
* oflag = 0x0601
|
||||
*/
|
||||
open_payload[0] = 0x01;
|
||||
open_payload[1] = 0x06;
|
||||
open_payload[2] = 0x00;
|
||||
open_payload[3] = 0x00;
|
||||
/* mode: use provided or default 0644 */
|
||||
open_payload[4] = (efs->mode ? efs->mode : 0644) & 0xFF;
|
||||
open_payload[5] = ((efs->mode ? efs->mode : 0644) >> 8) & 0xFF;
|
||||
open_payload[6] = 0x00;
|
||||
open_payload[7] = 0x00;
|
||||
memcpy(open_payload + 8, efs->path, path_len + 1);
|
||||
|
||||
ret = send_subsys_cmd(DIAG_SUBSYS_EFS2, EFS2_DIAG_OPEN,
|
||||
open_payload, 8 + path_len + 1,
|
||||
resp, sizeof(resp));
|
||||
if (ret < 8) {
|
||||
efs->status = -EIO;
|
||||
goto efs_write_out;
|
||||
}
|
||||
|
||||
fd = resp[4] | (resp[5] << 8) |
|
||||
(resp[6] << 16) | (resp[7] << 24);
|
||||
if (fd < 0) {
|
||||
efs->status = fd;
|
||||
goto efs_write_out;
|
||||
}
|
||||
|
||||
/*
|
||||
* Step 2: EFS2_DIAG_WRITE
|
||||
* Payload: [fd LE32] [offset LE32] [data...]
|
||||
*/
|
||||
write_payload[0] = fd & 0xFF;
|
||||
write_payload[1] = (fd >> 8) & 0xFF;
|
||||
write_payload[2] = (fd >> 16) & 0xFF;
|
||||
write_payload[3] = (fd >> 24) & 0xFF;
|
||||
write_payload[4] = efs->offset & 0xFF;
|
||||
write_payload[5] = (efs->offset >> 8) & 0xFF;
|
||||
write_payload[6] = (efs->offset >> 16) & 0xFF;
|
||||
write_payload[7] = (efs->offset >> 24) & 0xFF;
|
||||
memcpy(write_payload + 8, efs->data, efs->data_len);
|
||||
|
||||
ret = send_subsys_cmd(DIAG_SUBSYS_EFS2, EFS2_DIAG_WRITE,
|
||||
write_payload, 8 + efs->data_len,
|
||||
resp, sizeof(resp));
|
||||
if (ret > 8) {
|
||||
int32_t efs_errno = resp[8] | (resp[9] << 8) |
|
||||
(resp[10] << 16) | (resp[11] << 24);
|
||||
efs->status = efs_errno ? -efs_errno : 0;
|
||||
} else {
|
||||
efs->status = -EIO;
|
||||
}
|
||||
|
||||
/* Step 3: Close */
|
||||
send_subsys_cmd(DIAG_SUBSYS_EFS2, EFS2_DIAG_CLOSE,
|
||||
write_payload, 4, resp, sizeof(resp));
|
||||
|
||||
efs_write_out:
|
||||
if (copy_to_user((void __user *)arg, efs, sizeof(*efs)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
kfree(efs);
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_DIAG_EFS_STAT: {
|
||||
struct rc_efs_op *efs;
|
||||
uint8_t payload[264];
|
||||
uint8_t resp[64];
|
||||
int path_len;
|
||||
|
||||
efs = kmalloc(sizeof(*efs), GFP_KERNEL);
|
||||
if (!efs) {
|
||||
ret = -ENOMEM;
|
||||
break;
|
||||
}
|
||||
|
||||
if (copy_from_user(efs, (void __user *)arg, sizeof(*efs))) {
|
||||
kfree(efs);
|
||||
ret = -EFAULT;
|
||||
break;
|
||||
}
|
||||
|
||||
efs->path[sizeof(efs->path) - 1] = '\0';
|
||||
path_len = strlen(efs->path);
|
||||
memcpy(payload, efs->path, path_len + 1);
|
||||
|
||||
ret = send_subsys_cmd(DIAG_SUBSYS_EFS2, EFS2_DIAG_STAT,
|
||||
payload, path_len + 1,
|
||||
resp, sizeof(resp));
|
||||
if (ret > 4) {
|
||||
int32_t efs_errno = resp[4] | (resp[5] << 8) |
|
||||
(resp[6] << 16) | (resp[7] << 24);
|
||||
efs->status = efs_errno ? -efs_errno : 0;
|
||||
|
||||
if (efs->status == 0 && ret >= 16) {
|
||||
/* mode at offset 8, size at offset 12 */
|
||||
efs->mode = resp[8] | (resp[9] << 8) |
|
||||
(resp[10] << 16) | (resp[11] << 24);
|
||||
efs->data_len = resp[12] | (resp[13] << 8) |
|
||||
(resp[14] << 16) | (resp[15] << 24);
|
||||
}
|
||||
} else {
|
||||
efs->status = -EIO;
|
||||
}
|
||||
|
||||
if (copy_to_user((void __user *)arg, efs, sizeof(*efs)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
kfree(efs);
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_DIAG_EFS_UNLINK: {
|
||||
struct rc_efs_op *efs;
|
||||
uint8_t payload[264];
|
||||
uint8_t resp[32];
|
||||
int path_len;
|
||||
|
||||
efs = kmalloc(sizeof(*efs), GFP_KERNEL);
|
||||
if (!efs) {
|
||||
ret = -ENOMEM;
|
||||
break;
|
||||
}
|
||||
|
||||
if (copy_from_user(efs, (void __user *)arg, sizeof(*efs))) {
|
||||
kfree(efs);
|
||||
ret = -EFAULT;
|
||||
break;
|
||||
}
|
||||
|
||||
efs->path[sizeof(efs->path) - 1] = '\0';
|
||||
path_len = strlen(efs->path);
|
||||
memcpy(payload, efs->path, path_len + 1);
|
||||
|
||||
ret = send_subsys_cmd(DIAG_SUBSYS_EFS2, EFS2_DIAG_UNLINK,
|
||||
payload, path_len + 1,
|
||||
resp, sizeof(resp));
|
||||
if (ret > 4) {
|
||||
int32_t efs_errno = resp[4] | (resp[5] << 8) |
|
||||
(resp[6] << 16) | (resp[7] << 24);
|
||||
efs->status = efs_errno ? -efs_errno : 0;
|
||||
} else {
|
||||
efs->status = -EIO;
|
||||
}
|
||||
|
||||
if (copy_to_user((void __user *)arg, efs, sizeof(*efs)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
kfree(efs);
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_DIAG_GET_VERSION: {
|
||||
struct rc_diag_version ver;
|
||||
uint8_t diag_cmd = DIAG_VERNO_F;
|
||||
uint8_t resp[128];
|
||||
|
||||
memset(&ver, 0, sizeof(ver));
|
||||
|
||||
ret = send_diag_cmd(&diag_cmd, 1, resp, sizeof(resp));
|
||||
if (ret > 0) {
|
||||
/*
|
||||
* Version response:
|
||||
* [0x00] [comp_date 11B] [comp_time 8B]
|
||||
* [rel_date 11B] [rel_time 8B] [model...]
|
||||
*/
|
||||
if (ret >= 40) {
|
||||
memcpy(ver.comp_date, resp + 1, 11);
|
||||
memcpy(ver.comp_time, resp + 12, 8);
|
||||
memcpy(ver.rel_date, resp + 20, 11);
|
||||
memcpy(ver.rel_time, resp + 31, 8);
|
||||
}
|
||||
if (ret >= 42)
|
||||
ver.mob_sw_rev = resp[39];
|
||||
|
||||
if (copy_to_user((void __user *)arg, &ver,
|
||||
sizeof(ver)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
ret = -ENOTTY;
|
||||
}
|
||||
@@ -334,7 +953,7 @@ static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
static const struct file_operations rc_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.unlocked_ioctl = rc_ioctl,
|
||||
.compat_ioctl = rc_ioctl,
|
||||
.compat_ioctl = compat_ptr_ioctl,
|
||||
};
|
||||
|
||||
static int __init rc_diag_init(void)
|
||||
@@ -356,30 +975,43 @@ static int __init rc_diag_init(void)
|
||||
return ret;
|
||||
major = MAJOR(dev);
|
||||
|
||||
rc_class = class_create(THIS_MODULE, CLASS_NAME "_diag");
|
||||
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 4, 0)
|
||||
rc_class = class_create(CLASS_NAME);
|
||||
#else
|
||||
rc_class = class_create(THIS_MODULE, CLASS_NAME);
|
||||
#endif
|
||||
if (IS_ERR(rc_class)) {
|
||||
ret = PTR_ERR(rc_class);
|
||||
goto err;
|
||||
}
|
||||
|
||||
cdev_init(&rc_cdev, &rc_fops);
|
||||
cdev_add(&rc_cdev, MKDEV(major, 0), 1);
|
||||
rc_cdev.owner = THIS_MODULE;
|
||||
|
||||
ret = cdev_add(&rc_cdev, MKDEV(major, 0), 1);
|
||||
if (ret < 0)
|
||||
goto err_cdev;
|
||||
|
||||
rc_device = device_create(rc_class, NULL, MKDEV(major, 0),
|
||||
NULL, DEVICE_NAME);
|
||||
if (IS_ERR(rc_device)) {
|
||||
ret = PTR_ERR(rc_device);
|
||||
goto err2;
|
||||
goto err_device;
|
||||
}
|
||||
|
||||
pr_info("rc_diag: /dev/%s created\n", DEVICE_NAME);
|
||||
pr_info("rc_diag: /dev/%s created (major %d)%s\n",
|
||||
DEVICE_NAME, major,
|
||||
diag_filp ? "" : " [inactive — no Qualcomm modem]");
|
||||
return 0;
|
||||
|
||||
err2:
|
||||
err_device:
|
||||
cdev_del(&rc_cdev);
|
||||
err_cdev:
|
||||
class_destroy(rc_class);
|
||||
err:
|
||||
unregister_chrdev_region(MKDEV(major, 0), 1);
|
||||
if (diag_filp)
|
||||
filp_close(diag_filp, NULL);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
106
common/kmod/rc_ioctl.h
Normal file
106
common/kmod/rc_ioctl.h
Normal file
@@ -0,0 +1,106 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
||||
/*
|
||||
* rc_ioctl.h — Shared ioctl definitions for RadioControl kernel modules
|
||||
*
|
||||
* Include from userspace to use the ioctl interfaces on:
|
||||
* /dev/rc_shannon (Shannon modem AT commands)
|
||||
* /dev/rc_diag (Qualcomm DIAG protocol)
|
||||
*/
|
||||
|
||||
#ifndef _RC_IOCTL_H
|
||||
#define _RC_IOCTL_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/ioctl.h>
|
||||
|
||||
/* ---- /dev/rc_shannon ioctls ---- */
|
||||
|
||||
#define RC_SHANNON_MAGIC 'S'
|
||||
|
||||
struct rc_at_cmd {
|
||||
char cmd[4096];
|
||||
__u32 cmd_len;
|
||||
char resp[8192];
|
||||
__u32 resp_len;
|
||||
__u32 timeout_ms; /* 0 = use default (5000ms) */
|
||||
__s32 status; /* 0=OK, -1=ERROR, -2=TIMEOUT, -3=CME ERROR */
|
||||
};
|
||||
|
||||
struct rc_urc_msg {
|
||||
char data[1024];
|
||||
__u32 data_len;
|
||||
__s32 remaining; /* URCs still queued */
|
||||
};
|
||||
|
||||
struct rc_modem_status {
|
||||
char device_path[128];
|
||||
__s32 connected;
|
||||
__s32 urc_count;
|
||||
__u64 cmds_sent;
|
||||
__u64 cmds_failed;
|
||||
__u64 bytes_tx;
|
||||
__u64 bytes_rx;
|
||||
};
|
||||
|
||||
#define RC_SHANNON_AT_CMD _IOWR(RC_SHANNON_MAGIC, 1, struct rc_at_cmd)
|
||||
#define RC_SHANNON_GET_URC _IOR(RC_SHANNON_MAGIC, 2, struct rc_urc_msg)
|
||||
#define RC_SHANNON_SET_TIMEOUT _IOW(RC_SHANNON_MAGIC, 3, int)
|
||||
#define RC_SHANNON_GET_STATUS _IOR(RC_SHANNON_MAGIC, 4, struct rc_modem_status)
|
||||
#define RC_SHANNON_FLUSH _IO(RC_SHANNON_MAGIC, 5)
|
||||
|
||||
/* ---- /dev/rc_diag ioctls ---- */
|
||||
|
||||
#define RC_DIAG_MAGIC 'D'
|
||||
|
||||
struct rc_nv_item {
|
||||
__u16 id;
|
||||
__u16 status; /* 0 = success */
|
||||
__u8 data[128];
|
||||
__u32 data_len;
|
||||
};
|
||||
|
||||
struct rc_diag_raw {
|
||||
__u8 cmd[8192];
|
||||
__u32 cmd_len;
|
||||
__u8 resp[8192];
|
||||
__u32 resp_len;
|
||||
};
|
||||
|
||||
struct rc_ftm_cmd {
|
||||
__u16 cmd_id;
|
||||
__u16 data_len;
|
||||
__u8 data[512];
|
||||
__u16 status;
|
||||
__u8 resp[512];
|
||||
__u16 resp_len;
|
||||
};
|
||||
|
||||
struct rc_efs_op {
|
||||
char path[256];
|
||||
__u8 data[4096];
|
||||
__u32 data_len;
|
||||
__s32 status;
|
||||
__u32 mode; /* file mode for open/mkdir */
|
||||
__u32 offset; /* read/write offset */
|
||||
};
|
||||
|
||||
struct rc_diag_version {
|
||||
char comp_date[12];
|
||||
char comp_time[8];
|
||||
char rel_date[12];
|
||||
char rel_time[8];
|
||||
char model[32];
|
||||
__u8 mob_sw_rev;
|
||||
};
|
||||
|
||||
#define RC_DIAG_NV_READ _IOWR(RC_DIAG_MAGIC, 1, struct rc_nv_item)
|
||||
#define RC_DIAG_NV_WRITE _IOW(RC_DIAG_MAGIC, 2, struct rc_nv_item)
|
||||
#define RC_DIAG_RAW_CMD _IOWR(RC_DIAG_MAGIC, 3, struct rc_diag_raw)
|
||||
#define RC_DIAG_FTM_CMD _IOWR(RC_DIAG_MAGIC, 4, struct rc_ftm_cmd)
|
||||
#define RC_DIAG_EFS_READ _IOWR(RC_DIAG_MAGIC, 5, struct rc_efs_op)
|
||||
#define RC_DIAG_EFS_WRITE _IOW(RC_DIAG_MAGIC, 6, struct rc_efs_op)
|
||||
#define RC_DIAG_EFS_STAT _IOWR(RC_DIAG_MAGIC, 7, struct rc_efs_op)
|
||||
#define RC_DIAG_EFS_UNLINK _IOW(RC_DIAG_MAGIC, 8, struct rc_efs_op)
|
||||
#define RC_DIAG_GET_VERSION _IOR(RC_DIAG_MAGIC, 9, struct rc_diag_version)
|
||||
|
||||
#endif /* _RC_IOCTL_H */
|
||||
@@ -6,20 +6,23 @@
|
||||
* read responses from Samsung Shannon modem, bypassing the RIL
|
||||
* lock on /dev/umts_router0.
|
||||
*
|
||||
* On Exynos: talks to Shannon via /dev/umts_atc0 or umts_router0
|
||||
* On Tensor: same Shannon modem, paths may be /dev/nr_atc0
|
||||
* On Tensor G5: Shannon 5400 (S5400BUNUELO), paths include
|
||||
* /dev/umts_router, /dev/umts_atc0, /dev/nr_atc0
|
||||
*
|
||||
* This module:
|
||||
* 1. Opens the underlying modem char device from kernel space
|
||||
* 2. Creates /dev/rc_shannon as a proxy with proper queuing
|
||||
* 3. Multiplexes between RadioControl userspace and the modem
|
||||
* 4. Prevents RIL from monopolizing the AT channel
|
||||
* 4. Handles URCs (unsolicited result codes) from the modem
|
||||
* 5. Prevents RIL from monopolizing the AT channel
|
||||
*
|
||||
* Why a kernel module instead of just opening the device from userspace?
|
||||
* - The RIL daemon holds /dev/umts_router0 open exclusively
|
||||
* - Even with root, opening it races with RIL and can crash the modem
|
||||
* - This module uses a secondary AT channel (atc0/atc1) that RIL
|
||||
* doesn't claim, or creates a proper multiplexed path
|
||||
*
|
||||
* Target: Pixel 10 Pro Fold (rango), Tensor G5, kernel 6.6
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
@@ -35,6 +38,9 @@
|
||||
#include <linux/poll.h>
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/ioctl.h>
|
||||
#include <linux/circ_buf.h>
|
||||
#include <linux/version.h>
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("RadioControl");
|
||||
@@ -43,14 +49,54 @@ MODULE_VERSION("1.0");
|
||||
|
||||
#define DEVICE_NAME "rc_shannon"
|
||||
#define CLASS_NAME "radiocontrol"
|
||||
#define BUF_SIZE 4096
|
||||
#define CMD_BUF_SIZE 4096
|
||||
#define RESP_BUF_SIZE 8192
|
||||
#define URC_BUF_SIZE 16384
|
||||
#define MAX_CLIENTS 4
|
||||
|
||||
/* IOCTL commands */
|
||||
#define RC_SHANNON_MAGIC 'S'
|
||||
#define RC_SHANNON_AT_CMD _IOWR(RC_SHANNON_MAGIC, 1, struct rc_at_cmd)
|
||||
#define RC_SHANNON_GET_URC _IOR(RC_SHANNON_MAGIC, 2, struct rc_urc_msg)
|
||||
#define RC_SHANNON_SET_TIMEOUT _IOW(RC_SHANNON_MAGIC, 3, int)
|
||||
#define RC_SHANNON_GET_STATUS _IOR(RC_SHANNON_MAGIC, 4, struct rc_modem_status)
|
||||
#define RC_SHANNON_FLUSH _IO(RC_SHANNON_MAGIC, 5)
|
||||
|
||||
/* AT command with explicit timeout */
|
||||
struct rc_at_cmd {
|
||||
char cmd[CMD_BUF_SIZE];
|
||||
uint32_t cmd_len;
|
||||
char resp[RESP_BUF_SIZE];
|
||||
uint32_t resp_len;
|
||||
uint32_t timeout_ms; /* 0 = use default */
|
||||
int32_t status; /* 0=OK, -1=ERROR, -2=TIMEOUT, -3=CME ERROR */
|
||||
};
|
||||
|
||||
/* Unsolicited result code */
|
||||
struct rc_urc_msg {
|
||||
char data[1024];
|
||||
uint32_t data_len;
|
||||
int32_t remaining; /* URCs still queued */
|
||||
};
|
||||
|
||||
/* Modem status info */
|
||||
struct rc_modem_status {
|
||||
char device_path[128];
|
||||
int32_t connected;
|
||||
int32_t urc_count;
|
||||
uint64_t cmds_sent;
|
||||
uint64_t cmds_failed;
|
||||
uint64_t bytes_tx;
|
||||
uint64_t bytes_rx;
|
||||
};
|
||||
|
||||
/* Modem device paths to try, in order of preference */
|
||||
static const char *modem_paths[] = {
|
||||
"/dev/umts_atc0", /* Secondary AT channel — not claimed by RIL */
|
||||
"/dev/umts_atc1", /* Tertiary AT channel */
|
||||
"/dev/nr_atc0", /* Tensor NR naming */
|
||||
"/dev/umts_router0", /* Primary — last resort, RIL conflict risk */
|
||||
"/dev/umts_router", /* Tensor primary (no trailing 0) */
|
||||
"/dev/umts_router0", /* Exynos primary — last resort */
|
||||
NULL
|
||||
};
|
||||
|
||||
@@ -59,14 +105,124 @@ static struct class *rc_class;
|
||||
static struct cdev rc_cdev;
|
||||
static struct device *rc_device;
|
||||
static struct file *modem_filp;
|
||||
static char modem_path_used[128];
|
||||
static DEFINE_MUTEX(cmd_mutex);
|
||||
static DECLARE_WAIT_QUEUE_HEAD(resp_waitq);
|
||||
static DECLARE_WAIT_QUEUE_HEAD(urc_waitq);
|
||||
|
||||
/* Response buffer */
|
||||
static char resp_buf[BUF_SIZE];
|
||||
/* Response buffer for synchronous command/response */
|
||||
static char resp_buf[RESP_BUF_SIZE];
|
||||
static int resp_len;
|
||||
static bool resp_ready;
|
||||
|
||||
/* URC circular buffer */
|
||||
struct urc_entry {
|
||||
char data[1024];
|
||||
int len;
|
||||
};
|
||||
static struct urc_entry urc_ring[64];
|
||||
static int urc_head;
|
||||
static int urc_tail;
|
||||
static DEFINE_SPINLOCK(urc_lock);
|
||||
|
||||
/* Statistics */
|
||||
static uint64_t stat_cmds_sent;
|
||||
static uint64_t stat_cmds_failed;
|
||||
static uint64_t stat_bytes_tx;
|
||||
static uint64_t stat_bytes_rx;
|
||||
|
||||
/* Reader thread */
|
||||
static struct task_struct *reader_thread;
|
||||
static int default_timeout_ms = 5000;
|
||||
|
||||
/* Common URC prefixes from Shannon modems */
|
||||
static const char *urc_prefixes[] = {
|
||||
"+CRING:", "+CLIP:", "+CREG:", "+CGREG:",
|
||||
"+CEREG:", "+C5GREG:", "+CMTI:", "+CMT:",
|
||||
"+CDS:", "+CUSD:", "+CCWA:", "+CSSI:",
|
||||
"+CSSU:", "+COPS:", "RING", "NO CARRIER",
|
||||
"+CGEV:", "+CIEV:", "+AIMS", "$",
|
||||
NULL
|
||||
};
|
||||
|
||||
static bool is_urc(const char *line)
|
||||
{
|
||||
int i;
|
||||
|
||||
/* Skip leading \r\n */
|
||||
while (*line == '\r' || *line == '\n')
|
||||
line++;
|
||||
|
||||
for (i = 0; urc_prefixes[i]; i++) {
|
||||
if (strncmp(line, urc_prefixes[i],
|
||||
strlen(urc_prefixes[i])) == 0)
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
static void urc_enqueue(const char *data, int len)
|
||||
{
|
||||
unsigned long flags;
|
||||
int next;
|
||||
|
||||
spin_lock_irqsave(&urc_lock, flags);
|
||||
next = (urc_head + 1) % ARRAY_SIZE(urc_ring);
|
||||
if (next == urc_tail) {
|
||||
/* Ring full — drop oldest */
|
||||
urc_tail = (urc_tail + 1) % ARRAY_SIZE(urc_ring);
|
||||
}
|
||||
if (len > sizeof(urc_ring[0].data) - 1)
|
||||
len = sizeof(urc_ring[0].data) - 1;
|
||||
memcpy(urc_ring[urc_head].data, data, len);
|
||||
urc_ring[urc_head].data[len] = '\0';
|
||||
urc_ring[urc_head].len = len;
|
||||
urc_head = next;
|
||||
spin_unlock_irqrestore(&urc_lock, flags);
|
||||
|
||||
wake_up_interruptible(&urc_waitq);
|
||||
}
|
||||
|
||||
static int urc_dequeue(struct rc_urc_msg *msg)
|
||||
{
|
||||
unsigned long flags;
|
||||
int count;
|
||||
|
||||
spin_lock_irqsave(&urc_lock, flags);
|
||||
if (urc_head == urc_tail) {
|
||||
spin_unlock_irqrestore(&urc_lock, flags);
|
||||
return -EAGAIN;
|
||||
}
|
||||
msg->data_len = urc_ring[urc_tail].len;
|
||||
memcpy(msg->data, urc_ring[urc_tail].data, msg->data_len);
|
||||
msg->data[msg->data_len] = '\0';
|
||||
urc_tail = (urc_tail + 1) % ARRAY_SIZE(urc_ring);
|
||||
|
||||
/* Count remaining */
|
||||
if (urc_head >= urc_tail)
|
||||
count = urc_head - urc_tail;
|
||||
else
|
||||
count = ARRAY_SIZE(urc_ring) - urc_tail + urc_head;
|
||||
msg->remaining = count;
|
||||
spin_unlock_irqrestore(&urc_lock, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int urc_count(void)
|
||||
{
|
||||
unsigned long flags;
|
||||
int count;
|
||||
|
||||
spin_lock_irqsave(&urc_lock, flags);
|
||||
if (urc_head >= urc_tail)
|
||||
count = urc_head - urc_tail;
|
||||
else
|
||||
count = ARRAY_SIZE(urc_ring) - urc_tail + urc_head;
|
||||
spin_unlock_irqrestore(&urc_lock, flags);
|
||||
return count;
|
||||
}
|
||||
|
||||
/*
|
||||
* Open the underlying modem device from kernel context.
|
||||
*/
|
||||
@@ -78,6 +234,8 @@ static struct file *open_modem_device(void)
|
||||
for (i = 0; modem_paths[i]; i++) {
|
||||
f = filp_open(modem_paths[i], O_RDWR | O_NONBLOCK, 0);
|
||||
if (!IS_ERR(f)) {
|
||||
strscpy(modem_path_used, modem_paths[i],
|
||||
sizeof(modem_path_used));
|
||||
pr_info("rc_shannon: opened modem device: %s\n",
|
||||
modem_paths[i]);
|
||||
return f;
|
||||
@@ -91,46 +249,104 @@ static struct file *open_modem_device(void)
|
||||
|
||||
/*
|
||||
* Send an AT command to the modem and read the response.
|
||||
* Separates URCs from command responses.
|
||||
*/
|
||||
static int send_at_command(const char *cmd, int cmd_len,
|
||||
char *response, int resp_size)
|
||||
char *response, int resp_size, int timeout_ms)
|
||||
{
|
||||
loff_t pos = 0;
|
||||
ssize_t written, bytes_read;
|
||||
int timeout_ms = 3000;
|
||||
int elapsed = 0;
|
||||
int total_read = 0;
|
||||
char line_buf[1024];
|
||||
int line_pos = 0;
|
||||
bool in_response = false;
|
||||
|
||||
if (!modem_filp || IS_ERR(modem_filp))
|
||||
return -ENODEV;
|
||||
|
||||
if (timeout_ms <= 0)
|
||||
timeout_ms = default_timeout_ms;
|
||||
|
||||
/* Write command to modem */
|
||||
written = kernel_write(modem_filp, cmd, cmd_len, &pos);
|
||||
if (written < 0) {
|
||||
pr_err("rc_shannon: write failed: %zd\n", written);
|
||||
stat_cmds_failed++;
|
||||
return written;
|
||||
}
|
||||
stat_bytes_tx += written;
|
||||
stat_cmds_sent++;
|
||||
|
||||
/* Read response with timeout */
|
||||
/* Read response with timeout, filtering URCs */
|
||||
memset(response, 0, resp_size);
|
||||
pos = 0;
|
||||
|
||||
while (elapsed < timeout_ms && total_read < resp_size - 1) {
|
||||
bytes_read = kernel_read(modem_filp, response + total_read,
|
||||
resp_size - 1 - total_read, &pos);
|
||||
char tmp[512];
|
||||
|
||||
bytes_read = kernel_read(modem_filp, tmp, sizeof(tmp), &pos);
|
||||
if (bytes_read > 0) {
|
||||
total_read += bytes_read;
|
||||
/* Check for final response */
|
||||
if (strnstr(response, "\r\nOK\r\n", total_read) ||
|
||||
strnstr(response, "\r\nERROR\r\n", total_read) ||
|
||||
strnstr(response, "\r\n+CME ERROR:", total_read))
|
||||
break;
|
||||
int i;
|
||||
|
||||
stat_bytes_rx += bytes_read;
|
||||
|
||||
for (i = 0; i < bytes_read; i++) {
|
||||
char c = tmp[i];
|
||||
|
||||
/* Build lines to check for URCs */
|
||||
if (c == '\n' || line_pos >= sizeof(line_buf) - 1) {
|
||||
line_buf[line_pos] = '\0';
|
||||
|
||||
if (line_pos > 0 && is_urc(line_buf)) {
|
||||
/* It's a URC — queue it, don't add to response */
|
||||
urc_enqueue(line_buf, line_pos);
|
||||
} else {
|
||||
/* Part of command response */
|
||||
if (total_read + line_pos + 1 < resp_size) {
|
||||
memcpy(response + total_read,
|
||||
line_buf, line_pos);
|
||||
total_read += line_pos;
|
||||
response[total_read++] = '\n';
|
||||
in_response = true;
|
||||
}
|
||||
}
|
||||
line_pos = 0;
|
||||
} else if (c != '\r') {
|
||||
line_buf[line_pos++] = c;
|
||||
}
|
||||
}
|
||||
|
||||
/* Check for final response in accumulated data */
|
||||
if (in_response) {
|
||||
if (strnstr(response, "OK", total_read) ||
|
||||
strnstr(response, "ERROR", total_read) ||
|
||||
strnstr(response, "+CME ERROR:", total_read) ||
|
||||
strnstr(response, "+CMS ERROR:", total_read))
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
msleep(50);
|
||||
elapsed += 50;
|
||||
msleep(20);
|
||||
elapsed += 20;
|
||||
}
|
||||
}
|
||||
|
||||
/* Flush any remaining partial line */
|
||||
if (line_pos > 0) {
|
||||
line_buf[line_pos] = '\0';
|
||||
if (is_urc(line_buf)) {
|
||||
urc_enqueue(line_buf, line_pos);
|
||||
} else if (total_read + line_pos < resp_size) {
|
||||
memcpy(response + total_read, line_buf, line_pos);
|
||||
total_read += line_pos;
|
||||
}
|
||||
}
|
||||
|
||||
response[total_read] = '\0';
|
||||
|
||||
if (elapsed >= timeout_ms && total_read == 0)
|
||||
return -ETIMEDOUT;
|
||||
|
||||
return total_read;
|
||||
}
|
||||
|
||||
@@ -147,13 +363,16 @@ static int rc_release(struct inode *inode, struct file *file)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* write() — send AT command, response available via read()
|
||||
*/
|
||||
static ssize_t rc_write(struct file *file, const char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
char cmd_buf[BUF_SIZE];
|
||||
char cmd_buf[CMD_BUF_SIZE];
|
||||
int ret;
|
||||
|
||||
if (count >= BUF_SIZE)
|
||||
if (count >= CMD_BUF_SIZE - 2)
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(cmd_buf, buf, count))
|
||||
@@ -162,12 +381,17 @@ static ssize_t rc_write(struct file *file, const char __user *buf,
|
||||
|
||||
mutex_lock(&cmd_mutex);
|
||||
|
||||
/* Ensure command ends with \r\n */
|
||||
/* Ensure command ends with \r\n for the Shannon modem */
|
||||
if (count >= 2 && cmd_buf[count-2] == '\r' && cmd_buf[count-1] == '\n') {
|
||||
/* Already terminated */
|
||||
} else if (count >= 1 && cmd_buf[count-1] == '\r') {
|
||||
cmd_buf[count] = '\n';
|
||||
count++;
|
||||
} else if (count >= 1 && cmd_buf[count-1] == '\n') {
|
||||
/* Shift to insert \r before \n */
|
||||
cmd_buf[count] = cmd_buf[count-1];
|
||||
cmd_buf[count-1] = '\r';
|
||||
count++;
|
||||
} else {
|
||||
cmd_buf[count] = '\r';
|
||||
cmd_buf[count+1] = '\n';
|
||||
@@ -175,18 +399,25 @@ static ssize_t rc_write(struct file *file, const char __user *buf,
|
||||
}
|
||||
cmd_buf[count] = '\0';
|
||||
|
||||
ret = send_at_command(cmd_buf, count, resp_buf, BUF_SIZE);
|
||||
ret = send_at_command(cmd_buf, count, resp_buf, RESP_BUF_SIZE,
|
||||
default_timeout_ms);
|
||||
if (ret >= 0) {
|
||||
resp_len = ret;
|
||||
resp_ready = true;
|
||||
wake_up_interruptible(&resp_waitq);
|
||||
} else {
|
||||
resp_len = 0;
|
||||
resp_ready = false;
|
||||
}
|
||||
|
||||
mutex_unlock(&cmd_mutex);
|
||||
|
||||
return ret >= 0 ? count : ret;
|
||||
return ret >= 0 ? (ssize_t)count : ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* read() — get the response from the last AT command
|
||||
*/
|
||||
static ssize_t rc_read(struct file *file, char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
@@ -195,7 +426,8 @@ static ssize_t rc_read(struct file *file, char __user *buf,
|
||||
if (!resp_ready) {
|
||||
if (file->f_flags & O_NONBLOCK)
|
||||
return -EAGAIN;
|
||||
wait_event_interruptible(resp_waitq, resp_ready);
|
||||
if (wait_event_interruptible(resp_waitq, resp_ready))
|
||||
return -ERESTARTSYS;
|
||||
}
|
||||
|
||||
if (!resp_ready)
|
||||
@@ -209,24 +441,178 @@ static ssize_t rc_read(struct file *file, char __user *buf,
|
||||
return to_copy;
|
||||
}
|
||||
|
||||
static unsigned int rc_poll(struct file *file, poll_table *wait)
|
||||
static __poll_t rc_poll(struct file *file, poll_table *wait)
|
||||
{
|
||||
unsigned int mask = POLLOUT | POLLWRNORM;
|
||||
__poll_t mask = EPOLLOUT | EPOLLWRNORM;
|
||||
|
||||
poll_wait(file, &resp_waitq, wait);
|
||||
poll_wait(file, &urc_waitq, wait);
|
||||
|
||||
if (resp_ready)
|
||||
mask |= POLLIN | POLLRDNORM;
|
||||
mask |= EPOLLIN | EPOLLRDNORM;
|
||||
if (urc_count() > 0)
|
||||
mask |= EPOLLPRI; /* URCs available via ioctl */
|
||||
|
||||
return mask;
|
||||
}
|
||||
|
||||
/*
|
||||
* ioctl — structured AT command interface
|
||||
*/
|
||||
static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
switch (cmd) {
|
||||
case RC_SHANNON_AT_CMD: {
|
||||
struct rc_at_cmd *at;
|
||||
|
||||
at = kmalloc(sizeof(*at), GFP_KERNEL);
|
||||
if (!at)
|
||||
return -ENOMEM;
|
||||
|
||||
if (copy_from_user(at, (void __user *)arg, sizeof(*at))) {
|
||||
kfree(at);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
/* Sanity checks */
|
||||
if (at->cmd_len == 0 || at->cmd_len >= CMD_BUF_SIZE) {
|
||||
kfree(at);
|
||||
return -EINVAL;
|
||||
}
|
||||
at->cmd[at->cmd_len] = '\0';
|
||||
|
||||
/* Ensure \r\n termination */
|
||||
if (at->cmd_len < 2 ||
|
||||
at->cmd[at->cmd_len-2] != '\r' ||
|
||||
at->cmd[at->cmd_len-1] != '\n') {
|
||||
at->cmd[at->cmd_len++] = '\r';
|
||||
at->cmd[at->cmd_len++] = '\n';
|
||||
at->cmd[at->cmd_len] = '\0';
|
||||
}
|
||||
|
||||
mutex_lock(&cmd_mutex);
|
||||
ret = send_at_command(at->cmd, at->cmd_len,
|
||||
at->resp, sizeof(at->resp),
|
||||
at->timeout_ms ? at->timeout_ms :
|
||||
default_timeout_ms);
|
||||
mutex_unlock(&cmd_mutex);
|
||||
|
||||
if (ret >= 0) {
|
||||
at->resp_len = ret;
|
||||
/* Determine status from response */
|
||||
if (strnstr(at->resp, "OK", ret))
|
||||
at->status = 0;
|
||||
else if (strnstr(at->resp, "+CME ERROR:", ret))
|
||||
at->status = -3;
|
||||
else if (strnstr(at->resp, "+CMS ERROR:", ret))
|
||||
at->status = -3;
|
||||
else if (strnstr(at->resp, "ERROR", ret))
|
||||
at->status = -1;
|
||||
else
|
||||
at->status = 0; /* Got data but no final result */
|
||||
} else if (ret == -ETIMEDOUT) {
|
||||
at->resp_len = 0;
|
||||
at->status = -2;
|
||||
at->resp[0] = '\0';
|
||||
ret = 0; /* ioctl succeeded, timeout is in status */
|
||||
} else {
|
||||
at->status = ret;
|
||||
at->resp_len = 0;
|
||||
}
|
||||
|
||||
if (copy_to_user((void __user *)arg, at, sizeof(*at)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
|
||||
kfree(at);
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_SHANNON_GET_URC: {
|
||||
struct rc_urc_msg msg;
|
||||
|
||||
ret = urc_dequeue(&msg);
|
||||
if (ret == -EAGAIN) {
|
||||
if (file->f_flags & O_NONBLOCK)
|
||||
return -EAGAIN;
|
||||
if (wait_event_interruptible(urc_waitq,
|
||||
urc_count() > 0))
|
||||
return -ERESTARTSYS;
|
||||
ret = urc_dequeue(&msg);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (copy_to_user((void __user *)arg, &msg, sizeof(msg)))
|
||||
return -EFAULT;
|
||||
ret = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_SHANNON_SET_TIMEOUT: {
|
||||
int timeout;
|
||||
|
||||
if (get_user(timeout, (int __user *)arg))
|
||||
return -EFAULT;
|
||||
if (timeout < 100 || timeout > 60000)
|
||||
return -EINVAL;
|
||||
default_timeout_ms = timeout;
|
||||
ret = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_SHANNON_GET_STATUS: {
|
||||
struct rc_modem_status st;
|
||||
|
||||
memset(&st, 0, sizeof(st));
|
||||
strscpy(st.device_path, modem_path_used,
|
||||
sizeof(st.device_path));
|
||||
st.connected = (modem_filp && !IS_ERR(modem_filp)) ? 1 : 0;
|
||||
st.urc_count = urc_count();
|
||||
st.cmds_sent = stat_cmds_sent;
|
||||
st.cmds_failed = stat_cmds_failed;
|
||||
st.bytes_tx = stat_bytes_tx;
|
||||
st.bytes_rx = stat_bytes_rx;
|
||||
|
||||
if (copy_to_user((void __user *)arg, &st, sizeof(st)))
|
||||
return -EFAULT;
|
||||
ret = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
case RC_SHANNON_FLUSH: {
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&urc_lock, flags);
|
||||
urc_head = 0;
|
||||
urc_tail = 0;
|
||||
spin_unlock_irqrestore(&urc_lock, flags);
|
||||
|
||||
resp_ready = false;
|
||||
resp_len = 0;
|
||||
ret = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
ret = -ENOTTY;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct file_operations rc_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = rc_open,
|
||||
.release = rc_release,
|
||||
.read = rc_read,
|
||||
.write = rc_write,
|
||||
.poll = rc_poll,
|
||||
.owner = THIS_MODULE,
|
||||
.open = rc_open,
|
||||
.release = rc_release,
|
||||
.read = rc_read,
|
||||
.write = rc_write,
|
||||
.poll = rc_poll,
|
||||
.unlocked_ioctl = rc_ioctl,
|
||||
.compat_ioctl = compat_ptr_ioctl,
|
||||
};
|
||||
|
||||
static int __init rc_shannon_init(void)
|
||||
@@ -242,8 +628,12 @@ static int __init rc_shannon_init(void)
|
||||
pr_err("rc_shannon: no modem device found — Shannon modem "
|
||||
"not present or not accessible\n");
|
||||
modem_filp = NULL;
|
||||
/* Don't fail — we'll create the device node anyway
|
||||
* so userspace gets a clear error on read/write */
|
||||
/*
|
||||
* Don't fail — create the device node anyway so userspace
|
||||
* gets a clear -ENODEV on read/write rather than ENOENT
|
||||
* on open. The modem may come up later (e.g., after SIM
|
||||
* unlock or airplane mode toggle).
|
||||
*/
|
||||
}
|
||||
|
||||
/* Register char device */
|
||||
@@ -252,7 +642,16 @@ static int __init rc_shannon_init(void)
|
||||
goto err_chrdev;
|
||||
major = MAJOR(dev);
|
||||
|
||||
/*
|
||||
* class_create() signature changed in kernel 6.4:
|
||||
* 6.4+: class_create(name)
|
||||
* <6.4: class_create(THIS_MODULE, name)
|
||||
*/
|
||||
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 4, 0)
|
||||
rc_class = class_create(CLASS_NAME);
|
||||
#else
|
||||
rc_class = class_create(THIS_MODULE, CLASS_NAME);
|
||||
#endif
|
||||
if (IS_ERR(rc_class)) {
|
||||
ret = PTR_ERR(rc_class);
|
||||
goto err_class;
|
||||
@@ -272,9 +671,27 @@ static int __init rc_shannon_init(void)
|
||||
goto err_device;
|
||||
}
|
||||
|
||||
/* Make device world-accessible (root context anyway) */
|
||||
pr_info("rc_shannon: /dev/%s created (major %d)\n",
|
||||
DEVICE_NAME, major);
|
||||
|
||||
if (modem_filp) {
|
||||
/* Verify modem is responsive */
|
||||
char test_resp[256];
|
||||
int test_ret;
|
||||
|
||||
mutex_lock(&cmd_mutex);
|
||||
test_ret = send_at_command("AT\r\n", 4, test_resp,
|
||||
sizeof(test_resp), 2000);
|
||||
mutex_unlock(&cmd_mutex);
|
||||
|
||||
if (test_ret > 0 && strnstr(test_resp, "OK", test_ret))
|
||||
pr_info("rc_shannon: modem responsive (AT -> OK)\n");
|
||||
else
|
||||
pr_warn("rc_shannon: modem opened but AT test "
|
||||
"failed (ret=%d) — may need SELinux permissive\n",
|
||||
test_ret);
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_device:
|
||||
@@ -299,7 +716,9 @@ static void __exit rc_shannon_exit(void)
|
||||
if (modem_filp)
|
||||
filp_close(modem_filp, NULL);
|
||||
|
||||
pr_info("rc_shannon: unloaded\n");
|
||||
pr_info("rc_shannon: unloaded — sent %llu commands, "
|
||||
"%llu bytes tx, %llu bytes rx\n",
|
||||
stat_cmds_sent, stat_bytes_tx, stat_bytes_rx);
|
||||
}
|
||||
|
||||
module_init(rc_shannon_init);
|
||||
|
||||
@@ -9,19 +9,19 @@
|
||||
*
|
||||
* Supported drivers:
|
||||
* - Samsung SCSC/SLSI (scsc_wlan)
|
||||
* - Broadcom bcmdhd / DHD
|
||||
* - Qualcomm cnss2 / ath11k / ath12k (usually already has
|
||||
* monitor, but vendor builds may disable it)
|
||||
* - Broadcom bcmdhd / DHD (BCM4390 etc)
|
||||
* - Qualcomm cnss2 / ath11k / ath12k
|
||||
*
|
||||
* Approach:
|
||||
* 1. Locate the WiFi driver's registered wiphy via cfg80211
|
||||
* 2. Find the cfg80211_ops function table
|
||||
* 3. Patch change_virtual_intf to accept monitor mode
|
||||
* 4. Update wiphy->interface_modes bitmask
|
||||
* 5. For SCSC: also hook the firmware command path to send
|
||||
* the MIB key that enables RF monitor in Maxwell firmware
|
||||
* 5. Driver-specific: send iovars/MIBs to firmware
|
||||
*
|
||||
* This is a live kernel patch — no reboot required after insmod.
|
||||
*
|
||||
* Target: Pixel 10 Pro Fold (rango), Tensor G5, BCM4390, kernel 6.6
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
@@ -30,8 +30,11 @@
|
||||
#include <linux/netdevice.h>
|
||||
#include <linux/rtnetlink.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/kallsyms.h>
|
||||
#include <linux/set_memory.h>
|
||||
#include <linux/kprobes.h>
|
||||
#include <linux/sysfs.h>
|
||||
#include <linux/kobject.h>
|
||||
#include <linux/if_arp.h>
|
||||
#include <net/cfg80211.h>
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
@@ -39,7 +42,32 @@ MODULE_AUTHOR("RadioControl");
|
||||
MODULE_DESCRIPTION("Runtime WiFi monitor/injection mode enabler");
|
||||
MODULE_VERSION("1.0");
|
||||
|
||||
/* Which driver we detected */
|
||||
/* ---- kallsyms_lookup_name workaround for kernel >= 5.7 ---- */
|
||||
|
||||
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 7, 0)
|
||||
static unsigned long rc_kallsyms_lookup(const char *name)
|
||||
{
|
||||
struct kprobe kp = { .symbol_name = name };
|
||||
unsigned long addr;
|
||||
int ret;
|
||||
|
||||
ret = register_kprobe(&kp);
|
||||
if (ret < 0)
|
||||
return 0;
|
||||
addr = (unsigned long)kp.addr;
|
||||
unregister_kprobe(&kp);
|
||||
return addr;
|
||||
}
|
||||
#else
|
||||
#include <linux/kallsyms.h>
|
||||
static unsigned long rc_kallsyms_lookup(const char *name)
|
||||
{
|
||||
return kallsyms_lookup_name(name);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* ---- Driver type detection ---- */
|
||||
|
||||
enum wifi_driver_type {
|
||||
DRIVER_UNKNOWN = 0,
|
||||
DRIVER_SCSC,
|
||||
@@ -49,9 +77,15 @@ enum wifi_driver_type {
|
||||
DRIVER_CNSS,
|
||||
};
|
||||
|
||||
static const char *driver_names[] = {
|
||||
"unknown", "scsc", "bcmdhd", "ath11k", "ath12k", "cnss"
|
||||
};
|
||||
|
||||
static enum wifi_driver_type detected_driver = DRIVER_UNKNOWN;
|
||||
static struct wiphy *target_wiphy;
|
||||
static struct cfg80211_ops *target_ops;
|
||||
static const struct cfg80211_ops *target_ops;
|
||||
static struct net_device *target_netdev;
|
||||
static u32 orig_interface_modes;
|
||||
|
||||
/* Original function pointer we're replacing */
|
||||
static int (*orig_change_virtual_intf)(struct wiphy *wiphy,
|
||||
@@ -59,6 +93,156 @@ static int (*orig_change_virtual_intf)(struct wiphy *wiphy,
|
||||
enum nl80211_iftype type,
|
||||
struct vif_params *params);
|
||||
|
||||
/* ---- sysfs status interface ---- */
|
||||
|
||||
static struct kobject *rc_kobj;
|
||||
|
||||
static ssize_t status_show(struct kobject *kobj, struct kobj_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
return sysfs_emit(buf,
|
||||
"driver=%s\n"
|
||||
"wiphy=%s\n"
|
||||
"netdev=%s\n"
|
||||
"monitor_supported=%d\n"
|
||||
"interface_modes=0x%x\n",
|
||||
driver_names[detected_driver],
|
||||
target_wiphy ? wiphy_name(target_wiphy) : "none",
|
||||
target_netdev ? target_netdev->name : "none",
|
||||
target_wiphy ? !!(target_wiphy->interface_modes &
|
||||
BIT(NL80211_IFTYPE_MONITOR)) : 0,
|
||||
target_wiphy ? target_wiphy->interface_modes : 0);
|
||||
}
|
||||
static struct kobj_attribute status_attr = __ATTR_RO(status);
|
||||
|
||||
static ssize_t driver_show(struct kobject *kobj, struct kobj_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
return sysfs_emit(buf, "%s\n", driver_names[detected_driver]);
|
||||
}
|
||||
static struct kobj_attribute driver_attr = __ATTR_RO(driver);
|
||||
|
||||
static struct attribute *rc_attrs[] = {
|
||||
&status_attr.attr,
|
||||
&driver_attr.attr,
|
||||
NULL,
|
||||
};
|
||||
static struct attribute_group rc_attr_group = {
|
||||
.attrs = rc_attrs,
|
||||
};
|
||||
|
||||
/* ---- bcmdhd driver-level monitor mode ---- */
|
||||
|
||||
/*
|
||||
* BCM4390 uses the bcmdhd4390 driver. Monitor mode requires:
|
||||
* 1. cfg80211 patching (we do above) so nl80211 accepts the type
|
||||
* 2. DHD driver internal flag set via dhd_set_monitor()
|
||||
* 3. Firmware iovar "monitor" set to 1
|
||||
* 4. Firmware iovar "promisc" set to 1
|
||||
*
|
||||
* We locate dhd_net_if_lock/unlock and the iovar path via kallsyms.
|
||||
* For full injection, Nexmon firmware patches are also required
|
||||
* (separate from this module).
|
||||
*/
|
||||
|
||||
/* DHD iovar interface — we call dhd_iovar through the netdev private data */
|
||||
typedef int (*dhd_ioctl_fn)(struct net_device *dev, struct ifreq *ifr, int cmd);
|
||||
|
||||
/*
|
||||
* Send a bcmdhd private iovar via SIOCDEVPRIVATE.
|
||||
* The DHD driver exposes iovars through wl_android_priv_cmd or
|
||||
* through the standard SIOCDEVPRIVATE ioctl path.
|
||||
*
|
||||
* For monitor mode we need:
|
||||
* wl monitor 1 (enable monitor)
|
||||
* wl promisc 1 (promiscuous)
|
||||
* wl allmulti 1 (all multicast)
|
||||
*/
|
||||
static int bcmdhd_set_iovar_int(const char *iovar, int val)
|
||||
{
|
||||
typedef int (*wldev_iovar_setint_fn)(struct net_device *dev,
|
||||
const char *iovar, int val);
|
||||
wldev_iovar_setint_fn set_fn;
|
||||
|
||||
set_fn = (wldev_iovar_setint_fn)rc_kallsyms_lookup("wldev_iovar_setint");
|
||||
if (!set_fn) {
|
||||
pr_debug("rc_wifi_mon: wldev_iovar_setint not found\n");
|
||||
return -ENOSYS;
|
||||
}
|
||||
|
||||
if (!target_netdev) {
|
||||
pr_err("rc_wifi_mon: no target netdev for iovar\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
return set_fn(target_netdev, iovar, val);
|
||||
}
|
||||
|
||||
static int bcmdhd_enable_monitor(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = bcmdhd_set_iovar_int("monitor", 1);
|
||||
if (ret) {
|
||||
pr_warn("rc_wifi_mon: bcmdhd 'monitor' iovar failed: %d "
|
||||
"(may need Nexmon firmware)\n", ret);
|
||||
/* Non-fatal — cfg80211 patching still works for some captures */
|
||||
} else {
|
||||
pr_info("rc_wifi_mon: bcmdhd firmware monitor mode enabled\n");
|
||||
}
|
||||
|
||||
bcmdhd_set_iovar_int("promisc", 1);
|
||||
bcmdhd_set_iovar_int("allmulti", 1);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void bcmdhd_disable_monitor(void)
|
||||
{
|
||||
bcmdhd_set_iovar_int("monitor", 0);
|
||||
bcmdhd_set_iovar_int("promisc", 0);
|
||||
bcmdhd_set_iovar_int("allmulti", 0);
|
||||
}
|
||||
|
||||
/* ---- SCSC/SLSI firmware monitor mode ---- */
|
||||
|
||||
/*
|
||||
* The Samsung SLSI firmware uses MIB OIDs to control behavior.
|
||||
* We locate slsi_mlme_set() and write the monitor-enable MIB.
|
||||
*
|
||||
* Key MIBs for SCSC monitor mode:
|
||||
* unifiMonitorModeEnabled = 0x09001E (OID)
|
||||
* unifiRxDataRate = 0x090020
|
||||
* unifiFrameRxCounters = 0x090021
|
||||
*
|
||||
* slsi_mlme_set signature:
|
||||
* int slsi_mlme_set(struct slsi_dev *sdev, struct net_device *dev,
|
||||
* u8 *mib, int mib_len);
|
||||
*
|
||||
* The MIB is TLV encoded: [OID 2B] [Length 2B] [Value...]
|
||||
*/
|
||||
|
||||
static void scsc_enable_fw_monitor(void)
|
||||
{
|
||||
typedef int (*slsi_mlme_set_fn)(void *sdev, struct net_device *dev,
|
||||
u8 *mib, int mib_len);
|
||||
slsi_mlme_set_fn mlme_set;
|
||||
|
||||
mlme_set = (slsi_mlme_set_fn)rc_kallsyms_lookup("slsi_mlme_set");
|
||||
if (!mlme_set) {
|
||||
pr_info("rc_wifi_mon: slsi_mlme_set not found — "
|
||||
"SCSC FW monitor mode MIB not set\n");
|
||||
pr_info("rc_wifi_mon: monitor mode will work at driver level "
|
||||
"but FW may filter some frames\n");
|
||||
return;
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: found slsi_mlme_set, SCSC FW patching "
|
||||
"available (MIB write deferred to mode switch)\n");
|
||||
}
|
||||
|
||||
/* ---- cfg80211 ops patching ---- */
|
||||
|
||||
/*
|
||||
* Our replacement change_virtual_intf that accepts monitor mode.
|
||||
* Falls through to the original handler for non-monitor types.
|
||||
@@ -68,28 +252,34 @@ static int rc_change_virtual_intf(struct wiphy *wiphy,
|
||||
enum nl80211_iftype type,
|
||||
struct vif_params *params)
|
||||
{
|
||||
/* Allow monitor and OCB modes through */
|
||||
if (type == NL80211_IFTYPE_MONITOR || type == NL80211_IFTYPE_OCB) {
|
||||
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
||||
|
||||
pr_info("rc_wifi_mon: setting interface %s to type %d\n",
|
||||
dev->name, type);
|
||||
|
||||
/* For monitor mode, we need to:
|
||||
* 1. Bring the interface down
|
||||
* 2. Change the type at the cfg80211 level
|
||||
* 3. Set promiscuous mode on the hardware
|
||||
/*
|
||||
* Bring interface down before changing type.
|
||||
* cfg80211 requires this for mode transitions.
|
||||
*/
|
||||
if (netif_running(dev))
|
||||
if (netif_running(dev)) {
|
||||
rtnl_lock();
|
||||
dev_close(dev);
|
||||
rtnl_unlock();
|
||||
}
|
||||
|
||||
wdev->iftype = type;
|
||||
|
||||
/* Set flags for monitor mode */
|
||||
if (type == NL80211_IFTYPE_MONITOR) {
|
||||
/* Set radiotap header type for monitor mode */
|
||||
dev->type = ARPHRD_IEEE80211_RADIOTAP;
|
||||
|
||||
if (params && params->flags)
|
||||
wdev->u.mntr.flags = params->flags;
|
||||
dev->type = ARPHRD_IEEE80211_RADIOTAP;
|
||||
|
||||
/* Driver-specific firmware enable */
|
||||
if (detected_driver == DRIVER_BCMDHD)
|
||||
bcmdhd_enable_monitor();
|
||||
} else {
|
||||
dev->type = ARPHRD_ETHER;
|
||||
}
|
||||
@@ -97,6 +287,13 @@ static int rc_change_virtual_intf(struct wiphy *wiphy,
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Non-monitor type: if switching back from monitor, restore state */
|
||||
if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_MONITOR) {
|
||||
dev->type = ARPHRD_ETHER;
|
||||
if (detected_driver == DRIVER_BCMDHD)
|
||||
bcmdhd_disable_monitor();
|
||||
}
|
||||
|
||||
/* All other types: pass through to original handler */
|
||||
if (orig_change_virtual_intf)
|
||||
return orig_change_virtual_intf(wiphy, dev, type, params);
|
||||
@@ -105,8 +302,7 @@ static int rc_change_virtual_intf(struct wiphy *wiphy,
|
||||
}
|
||||
|
||||
/*
|
||||
* Detect which WiFi driver is active by checking module names
|
||||
* and wiphy registration.
|
||||
* Detect which WiFi driver is active by walking registered net devices.
|
||||
*/
|
||||
static enum wifi_driver_type detect_driver(void)
|
||||
{
|
||||
@@ -123,26 +319,32 @@ static enum wifi_driver_type detect_driver(void)
|
||||
|
||||
if (strstr(drvname, "scsc") || strstr(drvname, "slsi")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
target_netdev = dev;
|
||||
rtnl_unlock();
|
||||
return DRIVER_SCSC;
|
||||
}
|
||||
if (strstr(drvname, "bcmdhd") || strstr(drvname, "dhd")) {
|
||||
if (strstr(drvname, "bcmdhd") || strstr(drvname, "dhd") ||
|
||||
strstr(drvname, "bcm4")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
target_netdev = dev;
|
||||
rtnl_unlock();
|
||||
return DRIVER_BCMDHD;
|
||||
}
|
||||
if (strstr(drvname, "ath11k")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
target_netdev = dev;
|
||||
rtnl_unlock();
|
||||
return DRIVER_ATH11K;
|
||||
}
|
||||
if (strstr(drvname, "ath12k")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
target_netdev = dev;
|
||||
rtnl_unlock();
|
||||
return DRIVER_ATH12K;
|
||||
}
|
||||
if (strstr(drvname, "cnss") || strstr(drvname, "qca")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
target_netdev = dev;
|
||||
rtnl_unlock();
|
||||
return DRIVER_CNSS;
|
||||
}
|
||||
@@ -153,11 +355,20 @@ static enum wifi_driver_type detect_driver(void)
|
||||
const char *wname = wiphy_name(dev->ieee80211_ptr->wiphy);
|
||||
|
||||
if (wname) {
|
||||
if (strstr(wname, "scsc") || strstr(wname, "slsi")) {
|
||||
if (strstr(wname, "scsc") ||
|
||||
strstr(wname, "slsi")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
target_netdev = dev;
|
||||
rtnl_unlock();
|
||||
return DRIVER_SCSC;
|
||||
}
|
||||
if (strstr(wname, "bcm") ||
|
||||
strstr(wname, "brcm")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
target_netdev = dev;
|
||||
rtnl_unlock();
|
||||
return DRIVER_BCMDHD;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -167,8 +378,10 @@ static enum wifi_driver_type detect_driver(void)
|
||||
}
|
||||
|
||||
/*
|
||||
* Make a kernel text page writable so we can patch the ops table.
|
||||
* We restore permissions after patching.
|
||||
* Make a kernel text/rodata page writable so we can patch the ops table.
|
||||
* Uses set_memory_rw/ro — safe on ARM64 with CONFIG_DEBUG_SET_MODULE_RONX=n.
|
||||
* Falls back to direct write if page permissions can't be changed
|
||||
* (module data sections are often already writable).
|
||||
*/
|
||||
static int make_ops_writable(void *addr, int writable)
|
||||
{
|
||||
@@ -185,103 +398,89 @@ static int make_ops_writable(void *addr, int writable)
|
||||
*/
|
||||
static int patch_wiphy(void)
|
||||
{
|
||||
struct cfg80211_ops *ops_rw;
|
||||
|
||||
if (!target_wiphy)
|
||||
return -ENODEV;
|
||||
|
||||
target_ops = (struct cfg80211_ops *)target_wiphy->ops;
|
||||
target_ops = target_wiphy->ops;
|
||||
if (!target_ops)
|
||||
return -ENODEV;
|
||||
|
||||
/* Save original handler */
|
||||
/* Save originals for restore on unload */
|
||||
orig_change_virtual_intf = target_ops->change_virtual_intf;
|
||||
orig_interface_modes = target_wiphy->interface_modes;
|
||||
|
||||
/* Add monitor mode to supported interface types */
|
||||
/* Add monitor and OCB to supported interface types */
|
||||
target_wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
|
||||
target_wiphy->interface_modes |= BIT(NL80211_IFTYPE_OCB);
|
||||
|
||||
/* Patch the ops table */
|
||||
if (make_ops_writable((void *)target_ops, 1) == 0) {
|
||||
((struct cfg80211_ops *)target_ops)->change_virtual_intf =
|
||||
rc_change_virtual_intf;
|
||||
make_ops_writable((void *)target_ops, 0);
|
||||
pr_info("rc_wifi_mon: patched change_virtual_intf\n");
|
||||
/* Patch the ops table — need to cast away const and make writable */
|
||||
ops_rw = (struct cfg80211_ops *)target_ops;
|
||||
|
||||
if (make_ops_writable(ops_rw, 1) == 0) {
|
||||
ops_rw->change_virtual_intf = rc_change_virtual_intf;
|
||||
make_ops_writable(ops_rw, 0);
|
||||
pr_info("rc_wifi_mon: patched change_virtual_intf via "
|
||||
"set_memory_rw\n");
|
||||
} else {
|
||||
pr_warn("rc_wifi_mon: could not make ops writable, "
|
||||
"trying direct write\n");
|
||||
/* Some kernels allow direct writes to module data sections */
|
||||
((struct cfg80211_ops *)target_ops)->change_virtual_intf =
|
||||
rc_change_virtual_intf;
|
||||
/*
|
||||
* set_memory_rw failed — try direct write. This works if
|
||||
* the ops table lives in a writable module data section
|
||||
* rather than .rodata.
|
||||
*/
|
||||
pr_info("rc_wifi_mon: set_memory_rw failed, attempting "
|
||||
"direct patch\n");
|
||||
ops_rw->change_virtual_intf = rc_change_virtual_intf;
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: interface_modes now: 0x%x\n",
|
||||
target_wiphy->interface_modes);
|
||||
pr_info("rc_wifi_mon: interface_modes: 0x%x -> 0x%x\n",
|
||||
orig_interface_modes, target_wiphy->interface_modes);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* For SCSC/SLSI driver: send MIB keys to Maxwell firmware to
|
||||
* enable raw frame reception in monitor mode.
|
||||
*
|
||||
* The SLSI firmware uses MIB OIDs to control behavior. Key MIBs:
|
||||
* - unifiRxDataRate (for rate info in radiotap)
|
||||
* - unifiTxDataConfirm (for TX status)
|
||||
* - unifiMonitorModeEnabled (primary enable)
|
||||
* - unifiFrameRxCounters (statistics)
|
||||
*
|
||||
* We locate slsi_mlme_set() via kallsyms and call it directly.
|
||||
* Restore original state on module unload.
|
||||
*/
|
||||
static void scsc_enable_fw_monitor(void)
|
||||
static void unpatch_wiphy(void)
|
||||
{
|
||||
typedef int (*slsi_mlme_set_fn)(void *sdev, void *dev,
|
||||
u8 *mib, int mib_len);
|
||||
slsi_mlme_set_fn mlme_set;
|
||||
struct cfg80211_ops *ops_rw;
|
||||
|
||||
mlme_set = (slsi_mlme_set_fn)kallsyms_lookup_name("slsi_mlme_set");
|
||||
if (!mlme_set) {
|
||||
pr_info("rc_wifi_mon: slsi_mlme_set not found — "
|
||||
"SCSC FW monitor mode MIB not set\n");
|
||||
pr_info("rc_wifi_mon: monitor mode will work at driver level "
|
||||
"but FW may filter some frames\n");
|
||||
if (!target_ops || !orig_change_virtual_intf)
|
||||
return;
|
||||
|
||||
ops_rw = (struct cfg80211_ops *)target_ops;
|
||||
|
||||
/* Restore original change_virtual_intf */
|
||||
if (make_ops_writable(ops_rw, 1) == 0) {
|
||||
ops_rw->change_virtual_intf = orig_change_virtual_intf;
|
||||
make_ops_writable(ops_rw, 0);
|
||||
} else {
|
||||
ops_rw->change_virtual_intf = orig_change_virtual_intf;
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: found slsi_mlme_set, SCSC FW patching "
|
||||
"available (MIB write deferred to mode switch)\n");
|
||||
/* Actual MIB write happens when interface is switched to monitor —
|
||||
* we hook into the mode change path above */
|
||||
/* Restore original interface modes */
|
||||
if (target_wiphy)
|
||||
target_wiphy->interface_modes = orig_interface_modes;
|
||||
|
||||
/* If interface is still in monitor mode, reset it */
|
||||
if (target_netdev && target_netdev->ieee80211_ptr &&
|
||||
target_netdev->ieee80211_ptr->iftype == NL80211_IFTYPE_MONITOR) {
|
||||
target_netdev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION;
|
||||
target_netdev->type = ARPHRD_ETHER;
|
||||
if (detected_driver == DRIVER_BCMDHD)
|
||||
bcmdhd_disable_monitor();
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* For bcmdhd: set the DHD driver's monitor mode flag and issue
|
||||
* the firmware iovar to enable monitor.
|
||||
*/
|
||||
static void bcmdhd_prepare_monitor(void)
|
||||
{
|
||||
/* The bcmdhd driver checks an internal flag before allowing
|
||||
* monitor mode. We locate dhd_monitor_init or the cfg80211
|
||||
* vendor command handler.
|
||||
*
|
||||
* Key iovars we need the firmware to accept:
|
||||
* - "monitor" (1 = enable)
|
||||
* - "promisc" (1 = promiscuous)
|
||||
* - "allmulti" (1 = all multicast)
|
||||
*
|
||||
* For full injection, the firmware needs to be patched
|
||||
* (Nexmon-style). Our module enables the driver-level path;
|
||||
* firmware patching is a separate step via the nexmon framework.
|
||||
*/
|
||||
pr_info("rc_wifi_mon: bcmdhd driver detected — driver-level "
|
||||
"monitor mode enabled\n");
|
||||
pr_info("rc_wifi_mon: for packet injection, Nexmon firmware "
|
||||
"patch is also required\n");
|
||||
}
|
||||
/* ---- Module init/exit ---- */
|
||||
|
||||
static int __init rc_wifi_mon_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
pr_info("rc_wifi_mon: RadioControl WiFi monitor mode enabler\n");
|
||||
pr_info("rc_wifi_mon: RadioControl WiFi monitor mode enabler v1.0\n");
|
||||
|
||||
detected_driver = detect_driver();
|
||||
if (detected_driver == DRIVER_UNKNOWN) {
|
||||
@@ -289,9 +488,10 @@ static int __init rc_wifi_mon_init(void)
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: detected driver type: %d, wiphy: %s\n",
|
||||
detected_driver,
|
||||
target_wiphy ? wiphy_name(target_wiphy) : "null");
|
||||
pr_info("rc_wifi_mon: detected driver: %s, wiphy: %s, netdev: %s\n",
|
||||
driver_names[detected_driver],
|
||||
target_wiphy ? wiphy_name(target_wiphy) : "null",
|
||||
target_netdev ? target_netdev->name : "null");
|
||||
|
||||
ret = patch_wiphy();
|
||||
if (ret) {
|
||||
@@ -305,32 +505,40 @@ static int __init rc_wifi_mon_init(void)
|
||||
scsc_enable_fw_monitor();
|
||||
break;
|
||||
case DRIVER_BCMDHD:
|
||||
bcmdhd_prepare_monitor();
|
||||
pr_info("rc_wifi_mon: BCM4390 driver patched — monitor mode "
|
||||
"enabled at driver level\n");
|
||||
pr_info("rc_wifi_mon: for packet injection, Nexmon firmware "
|
||||
"patch is also required\n");
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
/* Create sysfs entries under /sys/kernel/rc_wifi_mon/ */
|
||||
rc_kobj = kobject_create_and_add("rc_wifi_mon", kernel_kobj);
|
||||
if (rc_kobj) {
|
||||
ret = sysfs_create_group(rc_kobj, &rc_attr_group);
|
||||
if (ret) {
|
||||
kobject_put(rc_kobj);
|
||||
rc_kobj = NULL;
|
||||
pr_warn("rc_wifi_mon: sysfs creation failed: %d\n", ret);
|
||||
/* Non-fatal */
|
||||
}
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: loaded — monitor mode available via "
|
||||
"'iw dev wlanX set type monitor'\n");
|
||||
"'iw dev %s set type monitor'\n",
|
||||
target_netdev ? target_netdev->name : "wlanX");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit rc_wifi_mon_exit(void)
|
||||
{
|
||||
/* Restore original handler */
|
||||
if (target_ops && orig_change_virtual_intf) {
|
||||
if (make_ops_writable((void *)target_ops, 1) == 0) {
|
||||
((struct cfg80211_ops *)target_ops)->change_virtual_intf =
|
||||
orig_change_virtual_intf;
|
||||
make_ops_writable((void *)target_ops, 0);
|
||||
}
|
||||
}
|
||||
unpatch_wiphy();
|
||||
|
||||
/* Remove monitor from interface_modes */
|
||||
if (target_wiphy) {
|
||||
target_wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MONITOR);
|
||||
target_wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_OCB);
|
||||
if (rc_kobj) {
|
||||
sysfs_remove_group(rc_kobj, &rc_attr_group);
|
||||
kobject_put(rc_kobj);
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: unloaded — monitor mode disabled\n");
|
||||
|
||||
Reference in New Issue
Block a user