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something_i_am_sure

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PoliEcho
2026-10-30 10:37:42 +01:00
parent 9615b5d42f
commit aef25a9d47
24 changed files with 4401 additions and 13 deletions
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CH32V003/Makefile
+8 -2
View File
@@ -10,11 +10,11 @@
# #
# This build does NOT use the WCH EVT SDK, WCH's GCC, libprintf, or IQmath. # This build does NOT use the WCH EVT SDK, WCH's GCC, libprintf, or IQmath.
TARGET ?= firmware TARGET ?= ch32v003_GPIO_USB
TARGET_MCU ?= CH32V003 TARGET_MCU ?= CH32V003
# Root of the ch32fun checkout (the directory containing ch32fun/ and minichlink/). # Root of the ch32fun checkout (the directory containing ch32fun/ and minichlink/).
CH32FUN_ROOT ?= $(HOME)/code/ch32fun CH32FUN_ROOT ?= ./rv003usb/ch32fun
CH32FUN ?= $(CH32FUN_ROOT)/ch32fun CH32FUN ?= $(CH32FUN_ROOT)/ch32fun
MINICHLINK ?= $(CH32FUN_ROOT)/minichlink MINICHLINK ?= $(CH32FUN_ROOT)/minichlink
@@ -27,6 +27,12 @@ NEWLIB ?= /usr/riscv64-elf/include
# make PREFIX=riscv32-unknown-elf # make PREFIX=riscv32-unknown-elf
PREFIX ?= riscv64-elf PREFIX ?= riscv64-elf
EXTRA_CFLAGS:=-I./rv003usb/lib -I./rv003usb/rv003usb -I../include -O3
ADDITIONAL_C_FILES+=$(wildcard ./src/*.c)
ADDITIONAL_C_FILES+=$(wildcard ./rv003usb/rv003usb/*.c)
ifeq ($(wildcard $(CH32FUN)/ch32fun.mk),) ifeq ($(wildcard $(CH32FUN)/ch32fun.mk),)
$(error ch32fun not found at $(CH32FUN). Set CH32FUN_ROOT=/path/to/ch32fun) $(error ch32fun not found at $(CH32FUN). Set CH32FUN_ROOT=/path/to/ch32fun)
endif endif
CH32V003/firmware.c → CH32V003/ch32v003_GPIO_USB.c
View File
CH32V003/funconfig.h
+2 -10
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@@ -1,16 +1,8 @@
/* SPDX-License-Identifier: MIT */
#ifndef _FUNCONFIG_H #ifndef _FUNCONFIG_H
#define _FUNCONFIG_H #define _FUNCONFIG_H
/* CH32V003: 48 MHz from the internal HSI + PLL. */
#define FUNCONF_USE_HSI 1
#define FUNCONF_USE_PLL 1
#define FUNCONF_SYSTEM_CORE_CLOCK 48000000
/*
* printf() goes to the SWIO debug channel by default.
* Use `make monitor` (minichlink -T) to view it.
*/
#define FUNCONF_USE_DEBUGPRINTF 1 #define FUNCONF_USE_DEBUGPRINTF 1
#define FUNCONF_SYSTICK_USE_HCLK 1
#endif #endif
CH32V003/src/callbacks.c
+43
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@@ -0,0 +1,43 @@
#include <stdint.h>
#include "ch32v003hw.h"
#include "rv003usb.h"
#include "ch32fun.h"
#include "usb.h"
static uint8_t ctl_buf[4] __attribute__((aligned(4)));
const uint8_t pin_lookup[] = {PA1,PA2,PC0,PC1,PC2,PC3,PC4,PC5,PC6,PC7,PD0,PD1,PD2,PD7};
void usb_handle_other_control_message(struct usb_endpoint *e, struct usb_urb *s,
struct rv003usb_internal *ist) {
uint8_t type = s->wRequestTypeLSBRequestMSB & 0xff;
uint8_t req = s->wRequestTypeLSBRequestMSB >> 8;
uint16_t wValue = s->lValueLSBIndexMSB & 0xffff; // driver: (op << 8) | pin
int len = 0;
if (type != 0xC0) return; // vendor, device to host
if (req == 0 /* GET_INFO */) {
struct microcontroller_capabilities* capabs = (struct microcontroller_capabilities*)ctl_buf;
capabs->num_gpio = sizeof(pin_lookup) / sizeof(typeof(pin_lookup[0]));
capabs->num_uart = 1;
capabs->num_spi = 1;
capabs->num_adc = 4 ;
len = 4;
} else if (req == 1 /* CONTROL_PINS */) {
switch (ctl_buf[0]) {
case (OP_GPIO_GET):
ctl_buf[0] = funDigitalRead(pin_lookup[ctl_buf[1]]);
len = 1;
break;
}
}
e->opaque = ctl_buf;
e->max_len = (s->wLength < len) ? s->wLength : len;
}
void usb_handle_user_data(struct usb_endpoint *e, int ep, uint8_t *data, int len,
struct rv003usb_internal *ist) {
if (ep != 1 || len < 1) return;
/* data[0] = OP_GPIO_SET / OP_GPIO_SET_DIR ... */
}
CH32V003/usb_config.h
+102
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@@ -0,0 +1,102 @@
#ifndef _USB_CONFIG_H
#define _USB_CONFIG_H
#define ENDPOINTS 2
#define USB_PORT D
#define USB_PIN_DP 3
#define USB_PIN_DM 4
// #define USB_PIN_DPU 2
#define RV003USB_OPTIMIZE_FLASH 1
#define RV003USB_DEBUG_TIMING 0
#define RV003USB_EVENT_DEBUGGING 0
#define RV003USB_HANDLE_IN_REQUEST 0
#define RV003USB_OTHER_CONTROL 1
#define RV003USB_HANDLE_USER_DATA 1
#define RV003USB_HID_FEATURES 0
#define RV003USB_USB_TERMINAL 0
#define RV003USB_USE_REBOOT_FEATURE_REPORT 0
#ifndef __ASSEMBLER__
#include <stdint.h>
#ifdef INSTANCE_DESCRIPTORS
static const uint8_t device_descriptor[] = {
18, 1,
0x10, 0x01, // USB 1.1
0x00, 0x00, 0x00,
0x08, // EP0 max packet
0xd0, 0xfa, // idVendor 0xfad0
0x00, 0x90, // idProduct 0x9000
0x02, 0x00,
1, 2, 3,
1,
};
static const uint8_t config_descriptor[] = {
9, 2,
0x20, 0x00, // wTotalLength = 9 + 9 + 7 + 7
0x01, // bNumInterfaces
0x01, // bConfigurationValue
0x00,
0x80,
0x64,
9, 4,
0, // bInterfaceNumber
0, // bAlternateSetting
2, // bNumEndpoints
0xff, // vendor specific class
0x00,
0x00,
0,
7, 0x05,
0x01, // EP1 OUT
0x03, // interrupt
0x08, 0x00, // max packet 8
10, // interval ms
7, 0x05,
0x81, // EP1 IN
0x03,
0x08, 0x00,
10,
};
#define STR_MANUFACTURER u"That real manufacturer"
#define STR_PRODUCT u"CH32V003 USB GPIO module"
#ifndef STR_SERIAL
#define STR_SERIAL u"deadbeef"
#endif
struct usb_string_descriptor_struct {
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t wString[];
};
const static struct usb_string_descriptor_struct string0 __attribute__((section(".rodata"))) = { 4, 3, {0x0409} };
const static struct usb_string_descriptor_struct string1 __attribute__((section(".rodata"))) = { sizeof(STR_MANUFACTURER), 3, STR_MANUFACTURER };
const static struct usb_string_descriptor_struct string2 __attribute__((section(".rodata"))) = { sizeof(STR_PRODUCT), 3, STR_PRODUCT };
const static struct usb_string_descriptor_struct string3 __attribute__((section(".rodata"))) = { sizeof(STR_SERIAL), 3, STR_SERIAL };
const static struct descriptor_list_struct {
uint32_t lIndexValue;
const uint8_t *addr;
uint8_t length;
} descriptor_list[] = {
{0x00000100, device_descriptor, sizeof(device_descriptor)},
{0x00000200, config_descriptor, sizeof(config_descriptor)},
{0x00000300, (const uint8_t *)&string0, 4},
{0x04090301, (const uint8_t *)&string1, sizeof(STR_MANUFACTURER)},
{0x04090302, (const uint8_t *)&string2, sizeof(STR_PRODUCT)},
{0x04090303, (const uint8_t *)&string3, sizeof(STR_SERIAL)}
};
#define DESCRIPTOR_LIST_ENTRIES ((sizeof(descriptor_list))/(sizeof(struct descriptor_list_struct)))
#endif
#endif
#endif
include/usb.h
+34
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@@ -0,0 +1,34 @@
#pragma once
#if __has_include(<linux/types.h>)
#include <linux/types.h>
#else
#include <stdint.h>
typedef uint8_t u8;
#endif
enum op_type {
OP_CAPABILITIES_GET,
OP_GPIO_GET,
OP_GPIO_SET,
OP_GPIO_SET_DIR,
OP_SET_ADC_PIN,
OP_READ_ADC,
OP_GPIO_SET_BAUD,
OP_GPIO_WRITE_UART,
OP_GPIO_READ_UART,
OP_GPIO_SET_CLK,
OP_GPIO_WRITE_SPI,
OP_GPIO_READ_SPI
};
enum direction { DIR_IN, DIR_OUT };
enum vendor_request {
GET_INFO,
CONTROL_PINS
};
struct __attribute__((packed)) microcontroller_capabilities {
u8 num_gpio;
u8 num_uart;
u8 num_spi;
u8 num_adc;
};
kernel/..module-common.o.cmd
+1144
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kernel/.Module.symvers.cmd
+1
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@@ -0,0 +1 @@
savedcmd_Module.symvers := /usr/lib/modules/7.2.9-zen1-1-zen/build/scripts/mod/modpost -M -a -N -o Module.symvers -n -T modules.order -i /usr/lib/modules/7.2.9-zen1-1-zen/build/Module.symvers -e
kernel/.main.ko.cmd
+1
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@@ -0,0 +1 @@
savedcmd_main.ko := ld -r -m elf_x86_64 -z noexecstack --no-warn-rwx-segments --build-id=sha1 -T /usr/lib/modules/7.2.9-zen1-1-zen/build/scripts/module.lds -o main.ko main.o main.mod.o .module-common.o
kernel/.main.mod.cmd
+1
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@@ -0,0 +1 @@
savedcmd_main.mod := printf '%s\n' main.o | awk '!x[$$0]++ { print("./"$$0) }' > main.mod
kernel/.main.mod.o.cmd
+1118
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kernel/.main.o.cmd
+1274
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File diff suppressed because it is too large Load Diff
kernel/.module-common.o
BIN
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kernel/.modules.order.cmd
+1
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@@ -0,0 +1 @@
savedcmd_modules.order := { echo main.o; :; } > modules.order
kernel/Makefile
+9
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@@ -0,0 +1,9 @@
obj-m += main.o
KDIR ?= /lib/modules/$(shell uname -r)/build
all:
$(MAKE) -C $(KDIR) M=$(PWD) modules
clean:
$(MAKE) -C $(KDIR) M=$(PWD) clean
kernel/Module.symvers
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kernel/compile_commands.json
+404
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@@ -0,0 +1,404 @@
[
{
"file": "main.c",
"arguments": [
"/usr/bin/gcc",
"-Wp,-MMD,./.main.o.d",
"-nostdinc",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/generated",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/generated/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include/generated/uapi",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/compiler-version.h",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/kconfig.h",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/compiler_types.h",
"-D__KERNEL__",
"-fshort-wchar",
"-funsigned-char",
"-fno-common",
"-fno-PIE",
"-fno-strict-aliasing",
"-std=gnu11",
"-fms-extensions",
"-mno-sse",
"-mno-mmx",
"-mno-sse2",
"-mno-3dnow",
"-mno-avx",
"-mno-sse4a",
"-mno-avx2",
"-fno-tree-vectorize",
"-fcf-protection=branch",
"-fno-jump-tables",
"-m64",
"-falign-jumps=1",
"-falign-loops=1",
"-mno-80387",
"-mno-fp-ret-in-387",
"-mpreferred-stack-boundary=3",
"-mskip-rax-setup",
"-march=x86-64",
"-mtune=generic",
"-mno-red-zone",
"-mcmodel=kernel",
"-mstack-protector-guard-reg=gs",
"-mstack-protector-guard-symbol=__ref_stack_chk_guard",
"-Wno-sign-compare",
"-fno-asynchronous-unwind-tables",
"-mindirect-branch=thunk-extern",
"-mindirect-branch-register",
"-mindirect-branch-cs-prefix",
"-mfunction-return=thunk-extern",
"-fno-jump-tables",
"-mharden-sls=all",
"-fpatchable-function-entry=16,16",
"-fno-delete-null-pointer-checks",
"-O3",
"-fno-allow-store-data-races",
"-fstack-protector-strong",
"-ftrivial-auto-var-init=zero",
"-fzero-init-padding-bits=all",
"-fno-stack-clash-protection",
"-fdiagnostics-show-context=2",
"-pg",
"-mrecord-mcount",
"-mfentry",
"-DCC_USING_FENTRY",
"-fmin-function-alignment=16",
"-fstrict-flex-arrays=3",
"-fno-strict-overflow",
"-fno-stack-check",
"-fconserve-stack",
"-fno-builtin-wcslen",
"-Wall",
"-Wextra",
"-Wundef",
"-Werror=implicit-function-declaration",
"-Werror=implicit-int",
"-Werror=return-type",
"-Werror=strict-prototypes",
"-Wno-format-security",
"-Wno-trigraphs",
"-Wno-frame-address",
"-Wno-address-of-packed-member",
"-Wmissing-declarations",
"-Wmissing-prototypes",
"-Wframe-larger-than=2048",
"-Wno-main",
"-Wno-type-limits",
"-Wno-dangling-pointer",
"-Wvla-larger-than=1",
"-Wno-pointer-sign",
"-Wcast-function-type",
"-Wno-unterminated-string-initialization",
"-Wno-array-bounds",
"-Wno-stringop-overflow",
"-Wno-alloc-size-larger-than",
"-Wimplicit-fallthrough=5",
"-Werror=date-time",
"-Werror=incompatible-pointer-types",
"-Werror=designated-init",
"-Wenum-conversion",
"-Wunused",
"-Wno-unused-but-set-variable",
"-Wno-unused-const-variable",
"-Wno-packed-not-aligned",
"-Wno-format-overflow",
"-Wno-format-truncation",
"-Wno-stringop-truncation",
"-Wno-override-init",
"-Wno-missing-field-initializers",
"-Wno-shift-negative-value",
"-Wno-maybe-uninitialized",
"-Wno-sign-compare",
"-Wno-unused-parameter",
"-g",
"-gdwarf-5",
"-DMODULE",
"-DKBUILD_BASENAME=\"main\"",
"-DKBUILD_MODNAME=\"main\"",
"-D__KBUILD_MODNAME=main",
"-c",
"-o",
"main.o",
"main.c"
],
"directory": "/home/lukas/code/Linux-microcontroller-GPIO/kernel",
"output": "main.o"
},
{
"file": "main.mod.c",
"arguments": [
"/usr/bin/gcc",
"-Wp,-MMD,./.main.mod.o.d",
"-nostdinc",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/generated",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/generated/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include/generated/uapi",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/compiler-version.h",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/kconfig.h",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/compiler_types.h",
"-D__KERNEL__",
"-fshort-wchar",
"-funsigned-char",
"-fno-common",
"-fno-PIE",
"-fno-strict-aliasing",
"-std=gnu11",
"-fms-extensions",
"-mno-sse",
"-mno-mmx",
"-mno-sse2",
"-mno-3dnow",
"-mno-avx",
"-mno-sse4a",
"-mno-avx2",
"-fno-tree-vectorize",
"-fcf-protection=branch",
"-fno-jump-tables",
"-m64",
"-falign-jumps=1",
"-falign-loops=1",
"-mno-80387",
"-mno-fp-ret-in-387",
"-mpreferred-stack-boundary=3",
"-mskip-rax-setup",
"-march=x86-64",
"-mtune=generic",
"-mno-red-zone",
"-mcmodel=kernel",
"-mstack-protector-guard-reg=gs",
"-mstack-protector-guard-symbol=__ref_stack_chk_guard",
"-Wno-sign-compare",
"-fno-asynchronous-unwind-tables",
"-mindirect-branch=thunk-extern",
"-mindirect-branch-register",
"-mindirect-branch-cs-prefix",
"-mfunction-return=thunk-extern",
"-fno-jump-tables",
"-mharden-sls=all",
"-fpatchable-function-entry=16,16",
"-fno-delete-null-pointer-checks",
"-O3",
"-fno-allow-store-data-races",
"-fstack-protector-strong",
"-ftrivial-auto-var-init=zero",
"-fzero-init-padding-bits=all",
"-fno-stack-clash-protection",
"-fdiagnostics-show-context=2",
"-pg",
"-mrecord-mcount",
"-mfentry",
"-DCC_USING_FENTRY",
"-fmin-function-alignment=16",
"-fstrict-flex-arrays=3",
"-fno-strict-overflow",
"-fno-stack-check",
"-fconserve-stack",
"-fno-builtin-wcslen",
"-Wall",
"-Wextra",
"-Wundef",
"-Werror=implicit-function-declaration",
"-Werror=implicit-int",
"-Werror=return-type",
"-Werror=strict-prototypes",
"-Wno-format-security",
"-Wno-trigraphs",
"-Wno-frame-address",
"-Wno-address-of-packed-member",
"-Wmissing-declarations",
"-Wmissing-prototypes",
"-Wframe-larger-than=2048",
"-Wno-main",
"-Wno-type-limits",
"-Wno-dangling-pointer",
"-Wvla-larger-than=1",
"-Wno-pointer-sign",
"-Wcast-function-type",
"-Wno-unterminated-string-initialization",
"-Wno-array-bounds",
"-Wno-stringop-overflow",
"-Wno-alloc-size-larger-than",
"-Wimplicit-fallthrough=5",
"-Werror=date-time",
"-Werror=incompatible-pointer-types",
"-Werror=designated-init",
"-Wenum-conversion",
"-Wunused",
"-Wno-unused-but-set-variable",
"-Wno-unused-const-variable",
"-Wno-packed-not-aligned",
"-Wno-format-overflow",
"-Wno-format-truncation",
"-Wno-stringop-truncation",
"-Wno-override-init",
"-Wno-missing-field-initializers",
"-Wno-shift-negative-value",
"-Wno-maybe-uninitialized",
"-Wno-sign-compare",
"-Wno-unused-parameter",
"-g",
"-gdwarf-5",
"-DMODULE",
"-DKBUILD_BASENAME=\"main.mod\"",
"-DKBUILD_MODNAME=\"main\"",
"-D__KBUILD_MODNAME=main",
"-c",
"-o",
"main.mod.o",
"main.mod.c"
],
"directory": "/home/lukas/code/Linux-microcontroller-GPIO/kernel",
"output": "main.mod.o"
},
{
"file": "/usr/lib/modules/7.2.9-zen1-1-zen/build/scripts/module-common.c",
"arguments": [
"/usr/bin/gcc",
"-Wp,-MMD,./..module-common.o.d",
"-nostdinc",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/generated",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/arch/x86/include/generated/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include/uapi",
"-I/usr/lib/modules/7.2.9-zen1-1-zen/build/include/generated/uapi",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/compiler-version.h",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/kconfig.h",
"-include",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/include/linux/compiler_types.h",
"-D__KERNEL__",
"-fshort-wchar",
"-funsigned-char",
"-fno-common",
"-fno-PIE",
"-fno-strict-aliasing",
"-std=gnu11",
"-fms-extensions",
"-mno-sse",
"-mno-mmx",
"-mno-sse2",
"-mno-3dnow",
"-mno-avx",
"-mno-sse4a",
"-mno-avx2",
"-fno-tree-vectorize",
"-fcf-protection=branch",
"-fno-jump-tables",
"-m64",
"-falign-jumps=1",
"-falign-loops=1",
"-mno-80387",
"-mno-fp-ret-in-387",
"-mpreferred-stack-boundary=3",
"-mskip-rax-setup",
"-march=x86-64",
"-mtune=generic",
"-mno-red-zone",
"-mcmodel=kernel",
"-mstack-protector-guard-reg=gs",
"-mstack-protector-guard-symbol=__ref_stack_chk_guard",
"-Wno-sign-compare",
"-fno-asynchronous-unwind-tables",
"-mindirect-branch=thunk-extern",
"-mindirect-branch-register",
"-mindirect-branch-cs-prefix",
"-mfunction-return=thunk-extern",
"-fno-jump-tables",
"-mharden-sls=all",
"-fpatchable-function-entry=16,16",
"-fno-delete-null-pointer-checks",
"-O3",
"-fno-allow-store-data-races",
"-fstack-protector-strong",
"-ftrivial-auto-var-init=zero",
"-fzero-init-padding-bits=all",
"-fno-stack-clash-protection",
"-fdiagnostics-show-context=2",
"-pg",
"-mrecord-mcount",
"-mfentry",
"-DCC_USING_FENTRY",
"-fmin-function-alignment=16",
"-fstrict-flex-arrays=3",
"-fno-strict-overflow",
"-fno-stack-check",
"-fconserve-stack",
"-fno-builtin-wcslen",
"-Wall",
"-Wextra",
"-Wundef",
"-Werror=implicit-function-declaration",
"-Werror=implicit-int",
"-Werror=return-type",
"-Werror=strict-prototypes",
"-Wno-format-security",
"-Wno-trigraphs",
"-Wno-frame-address",
"-Wno-address-of-packed-member",
"-Wmissing-declarations",
"-Wmissing-prototypes",
"-Wframe-larger-than=2048",
"-Wno-main",
"-Wno-type-limits",
"-Wno-dangling-pointer",
"-Wvla-larger-than=1",
"-Wno-pointer-sign",
"-Wcast-function-type",
"-Wno-unterminated-string-initialization",
"-Wno-array-bounds",
"-Wno-stringop-overflow",
"-Wno-alloc-size-larger-than",
"-Wimplicit-fallthrough=5",
"-Werror=date-time",
"-Werror=incompatible-pointer-types",
"-Werror=designated-init",
"-Wenum-conversion",
"-Wunused",
"-Wno-unused-but-set-variable",
"-Wno-unused-const-variable",
"-Wno-packed-not-aligned",
"-Wno-format-overflow",
"-Wno-format-truncation",
"-Wno-stringop-truncation",
"-Wno-override-init",
"-Wno-missing-field-initializers",
"-Wno-shift-negative-value",
"-Wno-maybe-uninitialized",
"-Wno-sign-compare",
"-Wno-unused-parameter",
"-g",
"-gdwarf-5",
"-DMODULE",
"-DKBUILD_BASENAME=\".module_common\"",
"-DKBUILD_MODNAME=\".module_common.o\"",
"-D__KBUILD_MODNAME=.module_common.o",
"-c",
"-o",
".module-common.o",
"/usr/lib/modules/7.2.9-zen1-1-zen/build/scripts/module-common.c"
],
"directory": "/home/lukas/code/Linux-microcontroller-GPIO/kernel",
"output": ".module-common.o"
}
]
kernel/main.c
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#include "../include/usb.h"
#include "asm-generic/errno-base.h"
#include "linux/cleanup.h"
#include "linux/device/devres.h"
#include "linux/gfp_types.h"
#include <linux/gpio/driver.h>
#include <linux/module.h>
#include <linux/usb.h>
#define GPIO_PIN_COUNT 18
struct microcontroller_gpio {
struct gpio_chip chip; /* kernel GPIO controller object */
struct usb_device *udev; /* handle used for all USB transfers */
struct usb_interface *intf;
unsigned char ep_addr;
int interval;
};
#include <linux/slab.h>
#include <linux/usb.h>
static int send_cmd_get_response_control(struct usb_device *udev, u8 *dst,
__u16 max_resp_size,
enum vendor_request request_type,
const u8 cmd[2]) {
int retval;
u16 wValue;
if (cmd == NULL) {
wValue = ((u16)cmd[0] << 8) | cmd[1]; /* Pack 2 command bytes into wValue */
} else {
wValue = 0;
}
/* 2. Execute Control IN transfer */
retval = usb_control_msg(
udev, usb_rcvctrlpipe(udev, 0), /* Control IN pipe */
request_type, /* bRequest */
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, /* bmRequestType */
wValue, /* 2 Command bytes sent in SETUP */
0x0000, /* wIndex (unused) */
dst, /* Buffer for incoming data */
max_resp_size, /* Request up to 256 bytes */
2000 /* Timeout (ms) */
);
if (retval < 0) {
pr_err("Control transfer failed: %d\n", retval);
}
return retval;
}
static void usb_data_send_completed(struct urb *urb) {
if (urb->status == 0)
pr_info("Async transfer successful!\n");
else
pr_err("Async transfer failed with status: %d\n", urb->status);
kfree(urb->transfer_buffer);
}
static int async_send_usb_data_to_microcontroller(const unsigned char *msg,
size_t msg_len,
struct usb_device *udev,
unsigned char ep_addr,int interval) {
struct urb *urb;
char *buf_dma;
int retval;
unsigned int pipe = usb_sndbulkpipe(udev, ep_addr);
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb)
return -ENOMEM;
buf_dma = kzalloc(msg_len, GFP_KERNEL);
if (!buf_dma) {
usb_free_urb(urb);
return -ENOMEM;
}
memcpy(buf_dma, msg, msg_len);
usb_fill_int_urb(urb, udev, pipe, buf_dma, msg_len, usb_data_send_completed, NULL, interval);
retval = usb_submit_urb(urb, GFP_KERNEL);
if (retval) {
pr_err("Failed to submit URB: %d\n", retval);
kfree(buf_dma);
}
// usb_data_send_completed will free is automaticaly
usb_free_urb(urb);
return retval;
}
/* Read the level of line "off" from the device; return 1, 0 or -errno. */
static int microcontroller_get(struct gpio_chip *gc, unsigned int off) {
if (off>= gc->ngpio) {
return -EINVAL;
}
struct microcontroller_gpio *dev = gpiochip_get_data(gc);
u8 retval;
const u8 cmd[] = {OP_GPIO_GET,off};
send_cmd_get_response_control(dev->udev, &retval, sizeof(retval), CONTROL_PINS, cmd);
return retval;
}
/* Drive output line "off" to "val" (0 or 1) on the device; return 0 or -errno.
*/
static int microcontroller_set(struct gpio_chip *gc, unsigned int off,
int val) {
struct microcontroller_gpio *dev = gpiochip_get_data(gc);
const unsigned char msg[2] = {OP_GPIO_SET, val};
return async_send_usb_data_to_microcontroller(msg, sizeof(msg), dev->udev,
dev->ep_addr,dev->interval);
};
/* Tell the device to make line "off" an input; return 0 or -errno. */
static int microcontroller_dir_in(struct gpio_chip *gc, unsigned int off) {
struct microcontroller_gpio *dev = gpiochip_get_data(gc);
const unsigned char msg[2] = {OP_GPIO_SET_DIR, DIR_IN};
return async_send_usb_data_to_microcontroller(msg, sizeof(msg), dev->udev,
dev->ep_addr,dev->interval);
}
/* Tell the device to make line "off" an output driving "val"; return 0 or
* -errno. */
static int microcontroller_dir_out(struct gpio_chip *gc, unsigned int off,
int val) {
struct microcontroller_gpio *dev = gpiochip_get_data(gc);
const unsigned char msg[3] = {OP_GPIO_SET_DIR, DIR_OUT, val};
return async_send_usb_data_to_microcontroller(msg, sizeof(msg), dev->udev,
dev->ep_addr,dev->interval);
}
static int get_microcontroller_capabilities(struct microcontroller_gpio *dev) {
struct microcontroller_capabilities capabs;
if (send_cmd_get_response_control(dev->udev, (u8 *)&capabs, sizeof(capabs),
GET_INFO, NULL) != sizeof(capabs)) {
dev->chip.ngpio = capabs.num_gpio;
return EINVAL;
}
return 0;
}
/* Called when the USB device matches: allocate state, fill gpio_chip, register
* it. */
static int microcontroller_probe(struct usb_interface *intf,
const struct usb_device_id *id) {
struct microcontroller_gpio *dev;
dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
if (!dev) {
return -ENOMEM;
}
struct usb_host_interface *iface_desc = intf->cur_altsetting;
struct usb_endpoint_descriptor *ep_desc;
int i;
for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
ep_desc = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_int_out(ep_desc)) {
pr_info("Found Bulk OUT endpoint address: 0x%02X\n",
ep_desc->bEndpointAddress);
dev->interval = ep_desc->bInterval;
dev->ep_addr = ep_desc->bEndpointAddress;
break;
}
}
usb_set_intfdata(intf, dev);
dev_info(&intf->dev, "USB device attached: vendor=0x%04x, product=0x%04x\n",
le16_to_cpu(dev->udev->descriptor.idVendor),
le16_to_cpu(dev->udev->descriptor.idProduct));
dev->udev = usb_get_dev(interface_to_usbdev(intf));
dev->intf = intf;
dev->chip.label = "microcontroller-gpio";
dev->chip.parent = &intf->dev;
dev->chip.owner = THIS_MODULE;
dev->chip.base = -1;
dev->chip.get = microcontroller_get;
dev->chip.set = microcontroller_set;
dev->chip.direction_input = microcontroller_dir_in;
dev->chip.direction_output = microcontroller_dir_out;
get_microcontroller_capabilities(dev);
int ret = devm_gpiochip_add_data(&intf->dev, &dev->chip, dev);
if (ret) {
dev_err(&intf->dev, "Failed to add gpio_chip\n");
return ret;
}
return 0;
}
/* Called on unplug or driver unbind: release the USB device reference. */
static void microcontroller_disconnect(struct usb_interface *intf) {
struct microcontroller_gpio *dev;
dev = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (dev) {
usb_put_dev(dev->udev);
}
}
/* VID/PID pairs this driver binds to. */
static const struct usb_device_id microcontroller_table[] = {
{USB_DEVICE(0xfad0, 0x9000)}, {}};
/* Exports the table so udev can autoload the module when the device appears. */
MODULE_DEVICE_TABLE(usb, microcontroller_table);
/* Ties probe, disconnect and the ID table together for the USB core. */
static struct usb_driver microcontroller_driver = {
.name = "microcontroller-GPIO",
.probe = microcontroller_probe,
.disconnect = microcontroller_disconnect,
.id_table = microcontroller_table,
};
/* Generates module init and exit that register and unregister
* microcontroller_driver.
*/
module_usb_driver(microcontroller_driver);
MODULE_LICENSE("GPL");
kernel/main.ko
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kernel/main.mod
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./main.o
kernel/main.mod.c
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#include <linux/module.h>
#include <linux/export-internal.h>
#include <linux/compiler.h>
MODULE_INFO(name, KBUILD_MODNAME);
__visible struct module __this_module
__section(".gnu.linkonce.this_module") = {
.name = KBUILD_MODNAME,
.init = init_module,
#ifdef CONFIG_MODULE_UNLOAD
.exit = cleanup_module,
#endif
.arch = MODULE_ARCH_INIT,
};
MODULE_INFO(depends, "");
MODULE_ALIAS("usb:v1234p5678d*dc*dsc*dp*ic*isc*ip*in*");
MODULE_INFO(srcversion, "263CD52FCADD9F48F0ABAB5");
kernel/main.mod.o
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kernel/main.o
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kernel/modules.order
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main.o