From a001e48baf4c40b75a6760e4dedd1dd4f901edd7 Mon Sep 17 00:00:00 2001 From: weidongshan Date: Thu, 13 Oct 2022 16:36:25 +0800 Subject: [PATCH] =?UTF-8?q?=E5=8F=91=E5=B8=83:=2009.2=5F=E7=BC=96=E5=86=99?= =?UTF-8?q?USB=E9=BC=A0=E6=A0=87=E9=A9=B1=E5=8A=A8=E7=A8=8B=E5=BA=8F=5F?= =?UTF-8?q?=E5=AE=8C=E5=96=84=E4=BB=A3=E7=A0=81,=2009.3=5F=E7=BC=96?= =?UTF-8?q?=E5=86=99USB=E9=BC=A0=E6=A0=87=E9=A9=B1=E5=8A=A8=E7=A8=8B?= =?UTF-8?q?=E5=BA=8F=5F=E4=B8=8A=E6=9C=BA=E5=AE=9E=E9=AA=8C?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../doc_pic/12_USB/09_编写USB鼠标驱动程序.md | 45 +++- .../source/12_USB/04_usbmouse_as_key/Makefile | 22 ++ .../12_USB/04_usbmouse_as_key/usbmouse.c | 246 ++++++++++++++++++ .../04_usbmouse_as_key/usbmouse_as_key.c | 148 +++++++++++ README.md | 9 +- .../doc_pic/12_USB/09_编写USB鼠标驱动程序.md | 45 +++- .../A7/12_USB/04_usbmouse_as_key/Makefile | 22 ++ .../A7/12_USB/04_usbmouse_as_key/usbmouse.c | 246 ++++++++++++++++++ .../04_usbmouse_as_key/usbmouse_as_key.c | 215 +++++++++++++++ 9 files changed, 995 insertions(+), 3 deletions(-) create mode 100644 IMX6ULL/source/12_USB/04_usbmouse_as_key/Makefile create mode 100644 IMX6ULL/source/12_USB/04_usbmouse_as_key/usbmouse.c create mode 100644 STM32MP157/source/A7/12_USB/04_usbmouse_as_key/Makefile create mode 100644 STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse.c create mode 100644 STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse_as_key.c diff --git a/IMX6ULL/doc_pic/12_USB/09_编写USB鼠标驱动程序.md b/IMX6ULL/doc_pic/12_USB/09_编写USB鼠标驱动程序.md index 913e41a..6e1ee5d 100644 --- a/IMX6ULL/doc_pic/12_USB/09_编写USB鼠标驱动程序.md +++ b/IMX6ULL/doc_pic/12_USB/09_编写USB鼠标驱动程序.md @@ -128,4 +128,47 @@ int (*probe) (struct usb_interface *intf, -## 3. 上机实验 \ No newline at end of file +## 3. 上机实验 + +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"： + +```shell +Device Drivers ---> + HID support ---> + USB HID support ---> + < > USB HID transport layer // 不要选中 +``` + + + +然后重新编译内核、给开发板替换内核。 + + + +测试： + +```shell +# 把USB鼠标查到开发板上 +# 先看看原来有哪些设备节点 +ls /dev/input/event* + +# 安装驱动程序 +insmod usbmouse_as_key.ko + +# 再看看新得到了哪个设备节点 +ls /dev/input/event* + +# 执行命令, 假设event4是新节点 +hexdump /dev/input/event4 + +# 点击鼠标按键即可观察输出信息 + +# 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" +cat /dev/tty0 + +# 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 +exec 0, or by paper mail: + * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic + */ + +#include +#include +#include +#include +#include +#include + +/* for apple IDs */ +#ifdef CONFIG_USB_HID_MODULE +#include "../hid-ids.h" +#endif + +/* + * Version Information + */ +#define DRIVER_VERSION "v1.6" +#define DRIVER_AUTHOR "Vojtech Pavlik " +#define DRIVER_DESC "USB HID Boot Protocol mouse driver" +#define DRIVER_LICENSE "GPL" + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE(DRIVER_LICENSE); + +struct usb_mouse { + char name[128]; + char phys[64]; + struct usb_device *usbdev; + struct input_dev *dev; + struct urb *irq; + + signed char *data; + dma_addr_t data_dma; +}; + +static void usb_mouse_irq(struct urb *urb) +{ + struct usb_mouse *mouse = urb->context; + signed char *data = mouse->data; + struct input_dev *dev = mouse->dev; + int status; + + switch (urb->status) { + case 0: /* success */ + break; + case -ECONNRESET: /* unlink */ + case -ENOENT: + case -ESHUTDOWN: + return; + /* -EPIPE: should clear the halt */ + default: /* error */ + goto resubmit; + } + + printk("get data: 0x%x 0x%x\n", data[0], data[1]); + input_report_key(dev, BTN_LEFT, data[0] & 0x01); + input_report_key(dev, BTN_RIGHT, data[0] & 0x02); + input_report_key(dev, BTN_MIDDLE, data[0] & 0x04); + input_report_key(dev, BTN_SIDE, data[0] & 0x08); + input_report_key(dev, BTN_EXTRA, data[0] & 0x10); + + input_report_rel(dev, REL_X, data[1]); + input_report_rel(dev, REL_Y, data[2]); + input_report_rel(dev, REL_WHEEL, data[3]); + + input_sync(dev); +resubmit: + status = usb_submit_urb (urb, GFP_ATOMIC); + if (status) + dev_err(&mouse->usbdev->dev, + "can't resubmit intr, %s-%s/input0, status %d\n", + mouse->usbdev->bus->bus_name, + mouse->usbdev->devpath, status); +} + +static int usb_mouse_open(struct input_dev *dev) +{ + struct usb_mouse *mouse = input_get_drvdata(dev); + + mouse->irq->dev = mouse->usbdev; + if (usb_submit_urb(mouse->irq, GFP_KERNEL)) + return -EIO; + + return 0; +} + +static void usb_mouse_close(struct input_dev *dev) +{ + struct usb_mouse *mouse = input_get_drvdata(dev); + + usb_kill_urb(mouse->irq); +} + +static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev(intf); + struct usb_host_interface *interface; + struct usb_endpoint_descriptor *endpoint; + struct usb_mouse *mouse; + struct input_dev *input_dev; + int pipe, maxp; + int error = -ENOMEM; + + 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)); + + mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!mouse || !input_dev) + goto fail1; + + mouse->data = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &mouse->data_dma); + if (!mouse->data) + goto fail1; + + mouse->irq = usb_alloc_urb(0, GFP_KERNEL); + if (!mouse->irq) + goto fail2; + + mouse->usbdev = dev; + mouse->dev = input_dev; + + if (dev->manufacturer) + strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name)); + + if (dev->product) { + if (dev->manufacturer) + strlcat(mouse->name, " ", sizeof(mouse->name)); + strlcat(mouse->name, dev->product, sizeof(mouse->name)); + } + + if (!strlen(mouse->name)) + snprintf(mouse->name, sizeof(mouse->name), + "USB HIDBP Mouse %04x:%04x", + le16_to_cpu(dev->descriptor.idVendor), + le16_to_cpu(dev->descriptor.idProduct)); + + usb_make_path(dev, mouse->phys, sizeof(mouse->phys)); + strlcat(mouse->phys, "/input0", sizeof(mouse->phys)); + + input_dev->name = mouse->name; + input_dev->phys = mouse->phys; + usb_to_input_id(dev, &input_dev->id); + input_dev->dev.parent = &intf->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); + input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | + BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); + input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); + input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | + BIT_MASK(BTN_EXTRA); + input_dev->relbit[0] |= BIT_MASK(REL_WHEEL); + + input_set_drvdata(input_dev, mouse); + + input_dev->open = usb_mouse_open; + input_dev->close = usb_mouse_close; + + usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data, + (maxp > 8 ? 8 : maxp), + usb_mouse_irq, mouse, endpoint->bInterval); + mouse->irq->transfer_dma = mouse->data_dma; + mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + error = input_register_device(mouse->dev); + if (error) + goto fail3; + + usb_set_intfdata(intf, mouse); + return 0; + +fail3: + usb_free_urb(mouse->irq); +fail2: + usb_free_coherent(dev, 8, mouse->data, mouse->data_dma); +fail1: + input_free_device(input_dev); + kfree(mouse); + return error; +} + +static void usb_mouse_disconnect(struct usb_interface *intf) +{ + struct usb_mouse *mouse = usb_get_intfdata (intf); + + usb_set_intfdata(intf, NULL); + if (mouse) { + usb_kill_urb(mouse->irq); + input_unregister_device(mouse->dev); + usb_free_urb(mouse->irq); + usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma); + kfree(mouse); + } +} + +static struct usb_device_id usb_mouse_id_table [] = { + { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT, + USB_INTERFACE_PROTOCOL_MOUSE) }, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE (usb, usb_mouse_id_table); + +static struct usb_driver usb_mouse_driver = { + .name = "usbmouse", + .probe = usb_mouse_probe, + .disconnect = usb_mouse_disconnect, + .id_table = usb_mouse_id_table, +}; + +module_usb_driver(usb_mouse_driver); diff --git a/IMX6ULL/source/12_USB/04_usbmouse_as_key/usbmouse_as_key.c b/IMX6ULL/source/12_USB/04_usbmouse_as_key/usbmouse_as_key.c index 1203f4f..0dad256 100644 --- a/IMX6ULL/source/12_USB/04_usbmouse_as_key/usbmouse_as_key.c +++ b/IMX6ULL/source/12_USB/04_usbmouse_as_key/usbmouse_as_key.c @@ -5,6 +5,19 @@ #include #include #include +#include +#include + +struct usb_mouse_as_key_desc { + struct usb_device *dev; + struct usb_interface *intf; + const struct usb_device_id *id; + int pipe, maxp; + int bInterval; + void *data_buffer; + dma_addr_t data_dma; + struct urb *urb; +}; /* 1. 构造usb_driver * 1.1 id_table : 能支持哪些设备 @@ -18,9 +31,115 @@ static struct usb_device_id usb_mouse_as_key_id_table [] = { }; +static void usb_mouse_as_key_irq(struct urb *urb) +{ + struct input_dev *dev = urb->context; + struct usb_mouse_as_key_desc *desc = input_get_drvdata(dev); + signed char *data = desc->data_buffer; + int status; + + //printk("%s %s %d, urb->status = %d\n", __FILE__, __FUNCTION__, __LINE__, urb->status); + + switch (urb->status) { + case 0: /* success */ + 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]); + input_report_key(dev, KEY_L, data[1] & 0x01); + 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 @@ -28,12 +147,40 @@ static int usb_mouse_as_key_probe(struct usb_interface *intf, const struct usb_d * 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); } @@ -48,6 +195,7 @@ static struct usb_driver usb_mouse_as_key_driver = { // 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); } diff --git a/README.md b/README.md index 0e617ad..0cd7ec9 100644 --- a/README.md +++ b/README.md @@ -691,7 +691,14 @@ git clone https://e.coding.net/weidongshan/linux/doc_and_source_for_drivers.git * 2022.10.11 发布"USB子系统" ```shell - 09_编写USB鼠标驱动程序 + 09.1_编写USB鼠标驱动程序_框架 + ``` + +* 2022.10.13 发布"USB子系统" + + ```shell + 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 ``` diff --git a/STM32MP157/doc_pic/12_USB/09_编写USB鼠标驱动程序.md b/STM32MP157/doc_pic/12_USB/09_编写USB鼠标驱动程序.md index 913e41a..6e1ee5d 100644 --- a/STM32MP157/doc_pic/12_USB/09_编写USB鼠标驱动程序.md +++ b/STM32MP157/doc_pic/12_USB/09_编写USB鼠标驱动程序.md @@ -128,4 +128,47 @@ int (*probe) (struct usb_interface *intf, -## 3. 上机实验 \ No newline at end of file +## 3. 上机实验 + +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"： + +```shell +Device Drivers ---> + HID support ---> + USB HID support ---> + < > USB HID transport layer // 不要选中 +``` + + + +然后重新编译内核、给开发板替换内核。 + + + +测试： + +```shell +# 把USB鼠标查到开发板上 +# 先看看原来有哪些设备节点 +ls /dev/input/event* + +# 安装驱动程序 +insmod usbmouse_as_key.ko + +# 再看看新得到了哪个设备节点 +ls /dev/input/event* + +# 执行命令, 假设event4是新节点 +hexdump /dev/input/event4 + +# 点击鼠标按键即可观察输出信息 + +# 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" +cat /dev/tty0 + +# 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 +exec 0, or by paper mail: + * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic + */ + +#include +#include +#include +#include +#include +#include + +/* for apple IDs */ +#ifdef CONFIG_USB_HID_MODULE +#include "../hid-ids.h" +#endif + +/* + * Version Information + */ +#define DRIVER_VERSION "v1.6" +#define DRIVER_AUTHOR "Vojtech Pavlik " +#define DRIVER_DESC "USB HID Boot Protocol mouse driver" +#define DRIVER_LICENSE "GPL" + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE(DRIVER_LICENSE); + +struct usb_mouse { + char name[128]; + char phys[64]; + struct usb_device *usbdev; + struct input_dev *dev; + struct urb *irq; + + signed char *data; + dma_addr_t data_dma; +}; + +static void usb_mouse_irq(struct urb *urb) +{ + struct usb_mouse *mouse = urb->context; + signed char *data = mouse->data; + struct input_dev *dev = mouse->dev; + int status; + + switch (urb->status) { + case 0: /* success */ + break; + case -ECONNRESET: /* unlink */ + case -ENOENT: + case -ESHUTDOWN: + return; + /* -EPIPE: should clear the halt */ + default: /* error */ + goto resubmit; + } + + printk("get data: 0x%x 0x%x\n", data[0], data[1]); + input_report_key(dev, BTN_LEFT, data[0] & 0x01); + input_report_key(dev, BTN_RIGHT, data[0] & 0x02); + input_report_key(dev, BTN_MIDDLE, data[0] & 0x04); + input_report_key(dev, BTN_SIDE, data[0] & 0x08); + input_report_key(dev, BTN_EXTRA, data[0] & 0x10); + + input_report_rel(dev, REL_X, data[1]); + input_report_rel(dev, REL_Y, data[2]); + input_report_rel(dev, REL_WHEEL, data[3]); + + input_sync(dev); +resubmit: + status = usb_submit_urb (urb, GFP_ATOMIC); + if (status) + dev_err(&mouse->usbdev->dev, + "can't resubmit intr, %s-%s/input0, status %d\n", + mouse->usbdev->bus->bus_name, + mouse->usbdev->devpath, status); +} + +static int usb_mouse_open(struct input_dev *dev) +{ + struct usb_mouse *mouse = input_get_drvdata(dev); + + mouse->irq->dev = mouse->usbdev; + if (usb_submit_urb(mouse->irq, GFP_KERNEL)) + return -EIO; + + return 0; +} + +static void usb_mouse_close(struct input_dev *dev) +{ + struct usb_mouse *mouse = input_get_drvdata(dev); + + usb_kill_urb(mouse->irq); +} + +static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev(intf); + struct usb_host_interface *interface; + struct usb_endpoint_descriptor *endpoint; + struct usb_mouse *mouse; + struct input_dev *input_dev; + int pipe, maxp; + int error = -ENOMEM; + + 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)); + + mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!mouse || !input_dev) + goto fail1; + + mouse->data = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &mouse->data_dma); + if (!mouse->data) + goto fail1; + + mouse->irq = usb_alloc_urb(0, GFP_KERNEL); + if (!mouse->irq) + goto fail2; + + mouse->usbdev = dev; + mouse->dev = input_dev; + + if (dev->manufacturer) + strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name)); + + if (dev->product) { + if (dev->manufacturer) + strlcat(mouse->name, " ", sizeof(mouse->name)); + strlcat(mouse->name, dev->product, sizeof(mouse->name)); + } + + if (!strlen(mouse->name)) + snprintf(mouse->name, sizeof(mouse->name), + "USB HIDBP Mouse %04x:%04x", + le16_to_cpu(dev->descriptor.idVendor), + le16_to_cpu(dev->descriptor.idProduct)); + + usb_make_path(dev, mouse->phys, sizeof(mouse->phys)); + strlcat(mouse->phys, "/input0", sizeof(mouse->phys)); + + input_dev->name = mouse->name; + input_dev->phys = mouse->phys; + usb_to_input_id(dev, &input_dev->id); + input_dev->dev.parent = &intf->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); + input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | + BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); + input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); + input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | + BIT_MASK(BTN_EXTRA); + input_dev->relbit[0] |= BIT_MASK(REL_WHEEL); + + input_set_drvdata(input_dev, mouse); + + input_dev->open = usb_mouse_open; + input_dev->close = usb_mouse_close; + + usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data, + (maxp > 8 ? 8 : maxp), + usb_mouse_irq, mouse, endpoint->bInterval); + mouse->irq->transfer_dma = mouse->data_dma; + mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + error = input_register_device(mouse->dev); + if (error) + goto fail3; + + usb_set_intfdata(intf, mouse); + return 0; + +fail3: + usb_free_urb(mouse->irq); +fail2: + usb_free_coherent(dev, 8, mouse->data, mouse->data_dma); +fail1: + input_free_device(input_dev); + kfree(mouse); + return error; +} + +static void usb_mouse_disconnect(struct usb_interface *intf) +{ + struct usb_mouse *mouse = usb_get_intfdata (intf); + + usb_set_intfdata(intf, NULL); + if (mouse) { + usb_kill_urb(mouse->irq); + input_unregister_device(mouse->dev); + usb_free_urb(mouse->irq); + usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma); + kfree(mouse); + } +} + +static struct usb_device_id usb_mouse_id_table [] = { + { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT, + USB_INTERFACE_PROTOCOL_MOUSE) }, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE (usb, usb_mouse_id_table); + +static struct usb_driver usb_mouse_driver = { + .name = "usbmouse", + .probe = usb_mouse_probe, + .disconnect = usb_mouse_disconnect, + .id_table = usb_mouse_id_table, +}; + +module_usb_driver(usb_mouse_driver); diff --git a/STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse_as_key.c b/STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse_as_key.c new file mode 100644 index 0000000..0dad256 --- /dev/null +++ b/STM32MP157/source/A7/12_USB/04_usbmouse_as_key/usbmouse_as_key.c @@ -0,0 +1,215 @@ + +/* 参考: drivers\hid\usbhid\usbmouse.c */ +#include +#include +#include +#include +#include +#include +#include + +struct usb_mouse_as_key_desc { + struct usb_device *dev; + struct usb_interface *intf; + const struct usb_device_id *id; + int pipe, maxp; + int bInterval; + void *data_buffer; + dma_addr_t data_dma; + struct urb *urb; +}; + +/* 1. 构造usb_driver + * 1.1 id_table : 能支持哪些设备 + * 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" + */ + +static struct usb_device_id usb_mouse_as_key_id_table [] = { + { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT, + USB_INTERFACE_PROTOCOL_MOUSE), .driver_info = (kernel_ulong_t)"it is a mouse", }, + { } /* Terminating entry */ +}; + + +static void usb_mouse_as_key_irq(struct urb *urb) +{ + struct input_dev *dev = urb->context; + struct usb_mouse_as_key_desc *desc = input_get_drvdata(dev); + signed char *data = desc->data_buffer; + int status; + + //printk("%s %s %d, urb->status = %d\n", __FILE__, __FUNCTION__, __LINE__, urb->status); + + switch (urb->status) { + case 0: /* success */ + 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]); + input_report_key(dev, KEY_L, data[1] & 0x01); + 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"); + +