mirror of
https://e.coding.net/weidongshan/linux/doc_and_source_for_drivers.git
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发布: 09.2_编写USB鼠标驱动程序_完善代码, 09.3_编写USB鼠标驱动程序_上机实验
This commit is contained in:
weidongshan
@@ -128,4 +128,47 @@ int (*probe) (struct usb_interface *intf,
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## 3. 上机实验
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## 3. 上机实验
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需要重新配置内核，去掉内核自带的驱动程序。在内核目录下执行"make menuconfig"：
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```shell
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Device Drivers --->
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HID support --->
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USB HID support --->
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< > USB HID transport layer // 不要选中
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```
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然后重新编译内核、给开发板替换内核。
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测试：
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```shell
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# 把USB鼠标查到开发板上
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# 先看看原来有哪些设备节点
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ls /dev/input/event*
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# 安装驱动程序
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insmod usbmouse_as_key.ko
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# 再看看新得到了哪个设备节点
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ls /dev/input/event*
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# 执行命令, 假设event4是新节点
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hexdump /dev/input/event4
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# 点击鼠标按键即可观察输出信息
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# 第2种测试方法: 执行以下命令，按鼠标左键、右键，再按中键就有输出"ls"
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cat /dev/tty0
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# 第3种测试方法: 执行以下命令(注意"<"号前后没有空格)，就可以使用鼠标按键在控制台输入字符
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exec 0</dev/tty0
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```
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22
STM32MP157/source/A7/12_USB/04_usbmouse_as_key/Makefile
Normal file
22
STM32MP157/source/A7/12_USB/04_usbmouse_as_key/Makefile
Normal file
@@ -0,0 +1,22 @@
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# 1. 使用不同的开发板内核时, 一定要修改KERN_DIR
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# 2. KERN_DIR中的内核要事先配置、编译, 为了能编译内核, 要先设置下列环境变量:
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# 2.1 ARCH, 比如: export ARCH=arm64
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# 2.2 CROSS_COMPILE, 比如: export CROSS_COMPILE=aarch64-linux-gnu-
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# 2.3 PATH, 比如: export PATH=$PATH:/home/book/100ask_roc-rk3399-pc/ToolChain-6.3.1/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu/bin
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# 注意: 不同的开发板不同的编译器上述3个环境变量不一定相同,
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# 请参考各开发板的高级用户使用手册
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KERN_DIR = /home/book/100ask_stm32mp157_pro-sdk/Linux-5.4
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all:
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make -C $(KERN_DIR) M=`pwd` modules
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clean:
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make -C $(KERN_DIR) M=`pwd` modules clean
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rm -rf modules.order
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obj-m += usbmouse_as_key.o
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obj-m += usbmouse.o
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246
STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse.c
Normal file
246
STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse.c
Normal file
@@ -0,0 +1,246 @@
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/*
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* Copyright (c) 1999-2001 Vojtech Pavlik
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*
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* USB HIDBP Mouse support
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Should you need to contact me, the author, you can do so either by
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* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
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* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/usb/input.h>
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#include <linux/hid.h>
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/* for apple IDs */
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#ifdef CONFIG_USB_HID_MODULE
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#include "../hid-ids.h"
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#endif
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v1.6"
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#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
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#define DRIVER_DESC "USB HID Boot Protocol mouse driver"
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#define DRIVER_LICENSE "GPL"
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE(DRIVER_LICENSE);
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struct usb_mouse {
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char name[128];
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char phys[64];
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struct usb_device *usbdev;
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struct input_dev *dev;
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struct urb *irq;
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signed char *data;
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dma_addr_t data_dma;
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};
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static void usb_mouse_irq(struct urb *urb)
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{
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struct usb_mouse *mouse = urb->context;
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signed char *data = mouse->data;
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struct input_dev *dev = mouse->dev;
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int status;
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switch (urb->status) {
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case 0: /* success */
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break;
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case -ECONNRESET: /* unlink */
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case -ENOENT:
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case -ESHUTDOWN:
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return;
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/* -EPIPE: should clear the halt */
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default: /* error */
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goto resubmit;
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}
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printk("get data: 0x%x 0x%x\n", data[0], data[1]);
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input_report_key(dev, BTN_LEFT, data[0] & 0x01);
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input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
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input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
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input_report_key(dev, BTN_SIDE, data[0] & 0x08);
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input_report_key(dev, BTN_EXTRA, data[0] & 0x10);
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input_report_rel(dev, REL_X, data[1]);
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input_report_rel(dev, REL_Y, data[2]);
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input_report_rel(dev, REL_WHEEL, data[3]);
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input_sync(dev);
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resubmit:
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status = usb_submit_urb (urb, GFP_ATOMIC);
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if (status)
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dev_err(&mouse->usbdev->dev,
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"can't resubmit intr, %s-%s/input0, status %d\n",
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mouse->usbdev->bus->bus_name,
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mouse->usbdev->devpath, status);
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}
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static int usb_mouse_open(struct input_dev *dev)
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{
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struct usb_mouse *mouse = input_get_drvdata(dev);
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mouse->irq->dev = mouse->usbdev;
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if (usb_submit_urb(mouse->irq, GFP_KERNEL))
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return -EIO;
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return 0;
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}
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static void usb_mouse_close(struct input_dev *dev)
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{
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struct usb_mouse *mouse = input_get_drvdata(dev);
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usb_kill_urb(mouse->irq);
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}
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static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id)
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{
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struct usb_device *dev = interface_to_usbdev(intf);
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struct usb_host_interface *interface;
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struct usb_endpoint_descriptor *endpoint;
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struct usb_mouse *mouse;
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struct input_dev *input_dev;
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int pipe, maxp;
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int error = -ENOMEM;
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interface = intf->cur_altsetting;
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if (interface->desc.bNumEndpoints != 1)
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return -ENODEV;
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endpoint = &interface->endpoint[0].desc;
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if (!usb_endpoint_is_int_in(endpoint))
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return -ENODEV;
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pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
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maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
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mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!mouse || !input_dev)
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goto fail1;
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mouse->data = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &mouse->data_dma);
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if (!mouse->data)
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goto fail1;
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mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
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if (!mouse->irq)
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goto fail2;
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mouse->usbdev = dev;
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mouse->dev = input_dev;
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if (dev->manufacturer)
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strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name));
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if (dev->product) {
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if (dev->manufacturer)
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strlcat(mouse->name, " ", sizeof(mouse->name));
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strlcat(mouse->name, dev->product, sizeof(mouse->name));
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}
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if (!strlen(mouse->name))
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snprintf(mouse->name, sizeof(mouse->name),
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"USB HIDBP Mouse %04x:%04x",
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le16_to_cpu(dev->descriptor.idVendor),
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le16_to_cpu(dev->descriptor.idProduct));
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usb_make_path(dev, mouse->phys, sizeof(mouse->phys));
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strlcat(mouse->phys, "/input0", sizeof(mouse->phys));
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input_dev->name = mouse->name;
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input_dev->phys = mouse->phys;
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usb_to_input_id(dev, &input_dev->id);
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input_dev->dev.parent = &intf->dev;
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
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input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
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BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
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input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
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input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
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BIT_MASK(BTN_EXTRA);
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input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
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input_set_drvdata(input_dev, mouse);
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input_dev->open = usb_mouse_open;
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input_dev->close = usb_mouse_close;
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usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
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(maxp > 8 ? 8 : maxp),
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usb_mouse_irq, mouse, endpoint->bInterval);
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mouse->irq->transfer_dma = mouse->data_dma;
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mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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error = input_register_device(mouse->dev);
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if (error)
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goto fail3;
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usb_set_intfdata(intf, mouse);
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return 0;
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fail3:
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usb_free_urb(mouse->irq);
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fail2:
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usb_free_coherent(dev, 8, mouse->data, mouse->data_dma);
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fail1:
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input_free_device(input_dev);
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kfree(mouse);
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return error;
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}
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static void usb_mouse_disconnect(struct usb_interface *intf)
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{
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struct usb_mouse *mouse = usb_get_intfdata (intf);
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usb_set_intfdata(intf, NULL);
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if (mouse) {
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usb_kill_urb(mouse->irq);
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input_unregister_device(mouse->dev);
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usb_free_urb(mouse->irq);
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usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
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kfree(mouse);
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}
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}
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static struct usb_device_id usb_mouse_id_table [] = {
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{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
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USB_INTERFACE_PROTOCOL_MOUSE) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
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static struct usb_driver usb_mouse_driver = {
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.name = "usbmouse",
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.probe = usb_mouse_probe,
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.disconnect = usb_mouse_disconnect,
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.id_table = usb_mouse_id_table,
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};
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module_usb_driver(usb_mouse_driver);
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215
STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse_as_key.c
Normal file
215
STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse_as_key.c
Normal file
@@ -0,0 +1,215 @@
|
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|
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/* 参考: drivers\hid\usbhid\usbmouse.c */
|
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#include <linux/kernel.h>
|
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#include <linux/slab.h>
|
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#include <linux/module.h>
|
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#include <linux/init.h>
|
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#include <linux/usb.h>
|
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#include <linux/input.h>
|
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#include <linux/hid.h>
|
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|
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struct usb_mouse_as_key_desc {
|
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struct usb_device *dev;
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struct usb_interface *intf;
|
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const struct usb_device_id *id;
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int pipe, maxp;
|
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int bInterval;
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void *data_buffer;
|
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dma_addr_t data_dma;
|
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struct urb *urb;
|
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};
|
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|
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/* 1. 构造usb_driver
|
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* 1.1 id_table : 能支持哪些设备
|
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* 1.2 probe : 记录某些信息, 分配/设置/注册input_dev, 也许"分配/填充/提交URB"
|
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*/
|
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|
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static struct usb_device_id usb_mouse_as_key_id_table [] = {
|
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{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
|
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USB_INTERFACE_PROTOCOL_MOUSE), .driver_info = (kernel_ulong_t)"it is a mouse", },
|
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{ } /* Terminating entry */
|
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};
|
||||
|
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|
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static void usb_mouse_as_key_irq(struct urb *urb)
|
||||
{
|
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struct input_dev *dev = urb->context;
|
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struct usb_mouse_as_key_desc *desc = input_get_drvdata(dev);
|
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signed char *data = desc->data_buffer;
|
||||
int status;
|
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|
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//printk("%s %s %d, urb->status = %d\n", __FILE__, __FUNCTION__, __LINE__, urb->status);
|
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|
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switch (urb->status) {
|
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case 0: /* success */
|
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break;
|
||||
case -ECONNRESET: /* unlink */
|
||||
case -ENOENT:
|
||||
case -ESHUTDOWN:
|
||||
return;
|
||||
/* -EPIPE: should clear the halt */
|
||||
default: /* error */
|
||||
goto resubmit;
|
||||
}
|
||||
|
||||
// printk("data[0] = 0x%x\n", data[1]);
|
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input_report_key(dev, KEY_L, data[1] & 0x01);
|
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input_report_key(dev, KEY_S, data[1] & 0x02);
|
||||
input_report_key(dev, KEY_ENTER, data[1] & 0x04);
|
||||
|
||||
input_sync(dev);
|
||||
resubmit:
|
||||
status = usb_submit_urb (urb, GFP_ATOMIC);
|
||||
//printk("%s %s %d, status = %d\n", __FILE__, __FUNCTION__, __LINE__, status);
|
||||
}
|
||||
|
||||
|
||||
static int usb_mouse_as_key_open(struct input_dev *dev)
|
||||
{
|
||||
struct urb *urb;
|
||||
struct usb_mouse_as_key_desc *desc = input_get_drvdata(dev);
|
||||
int err;
|
||||
|
||||
printk("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
|
||||
/* 分配/填充/提交 URB */
|
||||
urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
|
||||
desc->urb = urb;
|
||||
|
||||
usb_fill_int_urb(urb,
|
||||
desc->dev,
|
||||
desc->pipe,
|
||||
desc->data_buffer,
|
||||
(desc->maxp > 8 ? 8 : desc->maxp),
|
||||
usb_mouse_as_key_irq,
|
||||
dev,
|
||||
desc->bInterval);
|
||||
|
||||
urb->transfer_dma = desc->data_dma;
|
||||
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
||||
|
||||
err = usb_submit_urb (urb, GFP_ATOMIC);
|
||||
|
||||
printk("%s %s %d, err = %d\n", __FILE__, __FUNCTION__, __LINE__, err);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void usb_mouse_as_key_close(struct input_dev *dev)
|
||||
{
|
||||
struct usb_mouse_as_key_desc *desc = input_get_drvdata(dev);
|
||||
|
||||
/* 取消/释放 URB */
|
||||
usb_kill_urb(desc->urb);
|
||||
|
||||
usb_free_urb(desc->urb);
|
||||
}
|
||||
|
||||
|
||||
static int usb_mouse_as_key_probe(struct usb_interface *intf, const struct usb_device_id *id)
|
||||
{
|
||||
struct usb_device *dev = interface_to_usbdev(intf);
|
||||
struct input_dev *input_dev;
|
||||
struct usb_mouse_as_key_desc *desc;
|
||||
int error;
|
||||
struct usb_host_interface *interface;
|
||||
struct usb_endpoint_descriptor *endpoint;
|
||||
int pipe, maxp;
|
||||
|
||||
printk("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
|
||||
/* 1. 记录设备信息: intf */
|
||||
interface = intf->cur_altsetting;
|
||||
|
||||
if (interface->desc.bNumEndpoints != 1)
|
||||
return -ENODEV;
|
||||
|
||||
endpoint = &interface->endpoint[0].desc;
|
||||
if (!usb_endpoint_is_int_in(endpoint))
|
||||
return -ENODEV;
|
||||
|
||||
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
|
||||
maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
|
||||
|
||||
desc = kmalloc(sizeof(struct usb_mouse_as_key_desc), GFP_KERNEL);
|
||||
desc->dev = dev;
|
||||
desc->intf = intf;
|
||||
desc->id = id;
|
||||
desc->pipe = pipe;
|
||||
desc->maxp = maxp;
|
||||
desc->bInterval = endpoint->bInterval;
|
||||
desc->data_buffer = usb_alloc_coherent(dev, maxp, GFP_ATOMIC, &desc->data_dma);
|
||||
printk("%s %s %d, desc->data_buffer = 0x%x\n", __FILE__, __FUNCTION__, __LINE__, desc->data_buffer);
|
||||
|
||||
/* 2. 分配/设置/注册input_dev
|
||||
* 2.1 能产生哪类事件
|
||||
* 2.2 能产生这类事件里哪些些事件: L/S/ENTER
|
||||
* 2.3 设置函数, 比如open
|
||||
* 2.4 在open函数里: 分配/填充/提交 URB
|
||||
* 2.5 URB的回调函数: 解析数据, 上报input_event
|
||||
*/
|
||||
|
||||
input_dev = devm_input_allocate_device(&intf->dev);
|
||||
|
||||
input_set_drvdata(input_dev, desc);
|
||||
|
||||
/* set 1: which type event ? */
|
||||
__set_bit(EV_KEY, input_dev->evbit);
|
||||
|
||||
/* set 2: which event ? */
|
||||
__set_bit(KEY_L, input_dev->keybit);
|
||||
__set_bit(KEY_S, input_dev->keybit);
|
||||
__set_bit(KEY_ENTER, input_dev->keybit);
|
||||
|
||||
/* set 3: open */
|
||||
input_dev->open = usb_mouse_as_key_open;
|
||||
input_dev->close = usb_mouse_as_key_close;
|
||||
|
||||
error = input_register_device(input_dev);
|
||||
|
||||
usb_set_intfdata(intf, input_dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void usb_mouse_as_key_disconnect(struct usb_interface *intf)
|
||||
{
|
||||
struct input_dev *input_dev = usb_get_intfdata (intf);
|
||||
struct usb_mouse_as_key_desc *desc = input_get_drvdata(input_dev);
|
||||
|
||||
usb_free_coherent(desc->dev, desc->maxp, desc->data_buffer, desc->data_dma);
|
||||
kfree(desc);
|
||||
|
||||
input_unregister_device(input_dev);
|
||||
usb_set_intfdata(intf, NULL);
|
||||
}
|
||||
|
||||
|
||||
static struct usb_driver usb_mouse_as_key_driver = {
|
||||
.name = "usbmouse_as_key",
|
||||
.probe = usb_mouse_as_key_probe,
|
||||
.disconnect = usb_mouse_as_key_disconnect,
|
||||
.id_table = usb_mouse_as_key_id_table,
|
||||
};
|
||||
|
||||
/* 入口函数 / 出口函数 */
|
||||
// module_usb_driver(usb_mouse_as_key_driver);
|
||||
static int __init usb_mouse_as_key__init(void)
|
||||
{
|
||||
printk("%s %s %d\n", __FILE__, __FUNCTION__, __LINE__);
|
||||
return usb_register(&usb_mouse_as_key_driver);
|
||||
}
|
||||
|
||||
static void __exit usb_mouse_as_key__init_exit(void)
|
||||
{
|
||||
usb_deregister(&usb_mouse_as_key_driver);
|
||||
}
|
||||
|
||||
module_init(usb_mouse_as_key__init);
|
||||
module_exit(usb_mouse_as_key__init_exit);
|
||||
|
||||
|
||||
/* 2. 注册usb_driver */
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
|
||||
Reference in New Issue
Block a user