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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/usb/misc/idmouse.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/usb/misc/idmouse.c')
-rw-r--r-- | drivers/usb/misc/idmouse.c | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c new file mode 100644 index 000000000..ea39243ef --- /dev/null +++ b/drivers/usb/misc/idmouse.c @@ -0,0 +1,407 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Siemens ID Mouse driver v0.6 + + Copyright (C) 2004-5 by Florian 'Floe' Echtler <echtler@fs.tum.de> + and Andreas 'ad' Deresch <aderesch@fs.tum.de> + + Derived from the USB Skeleton driver 1.1, + Copyright (C) 2003 Greg Kroah-Hartman (greg@kroah.com) + + Additional information provided by Martin Reising + <Martin.Reising@natural-computing.de> + +*/ + +#include <linux/kernel.h> +#include <linux/sched/signal.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/completion.h> +#include <linux/mutex.h> +#include <linux/uaccess.h> +#include <linux/usb.h> + +/* image constants */ +#define WIDTH 225 +#define HEIGHT 289 +#define HEADER "P5 225 289 255 " +#define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1) + +#define DRIVER_SHORT "idmouse" +#define DRIVER_AUTHOR "Florian 'Floe' Echtler <echtler@fs.tum.de>" +#define DRIVER_DESC "Siemens ID Mouse FingerTIP Sensor Driver" + +/* minor number for misc USB devices */ +#define USB_IDMOUSE_MINOR_BASE 132 + +/* vendor and device IDs */ +#define ID_SIEMENS 0x0681 +#define ID_IDMOUSE 0x0005 +#define ID_CHERRY 0x0010 + +/* device ID table */ +static const struct usb_device_id idmouse_table[] = { + {USB_DEVICE(ID_SIEMENS, ID_IDMOUSE)}, /* Siemens ID Mouse (Professional) */ + {USB_DEVICE(ID_SIEMENS, ID_CHERRY )}, /* Cherry FingerTIP ID Board */ + {} /* terminating null entry */ +}; + +/* sensor commands */ +#define FTIP_RESET 0x20 +#define FTIP_ACQUIRE 0x21 +#define FTIP_RELEASE 0x22 +#define FTIP_BLINK 0x23 /* LSB of value = blink pulse width */ +#define FTIP_SCROLL 0x24 + +#define ftip_command(dev, command, value, index) \ + usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), command, \ + USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000) + +MODULE_DEVICE_TABLE(usb, idmouse_table); + +/* structure to hold all of our device specific stuff */ +struct usb_idmouse { + + struct usb_device *udev; /* save off the usb device pointer */ + struct usb_interface *interface; /* the interface for this device */ + + unsigned char *bulk_in_buffer; /* the buffer to receive data */ + size_t bulk_in_size; /* the maximum bulk packet size */ + size_t orig_bi_size; /* same as above, but reported by the device */ + __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */ + + int open; /* if the port is open or not */ + int present; /* if the device is not disconnected */ + struct mutex lock; /* locks this structure */ + +}; + +/* local function prototypes */ +static ssize_t idmouse_read(struct file *file, char __user *buffer, + size_t count, loff_t * ppos); + +static int idmouse_open(struct inode *inode, struct file *file); +static int idmouse_release(struct inode *inode, struct file *file); + +static int idmouse_probe(struct usb_interface *interface, + const struct usb_device_id *id); + +static void idmouse_disconnect(struct usb_interface *interface); +static int idmouse_suspend(struct usb_interface *intf, pm_message_t message); +static int idmouse_resume(struct usb_interface *intf); + +/* file operation pointers */ +static const struct file_operations idmouse_fops = { + .owner = THIS_MODULE, + .read = idmouse_read, + .open = idmouse_open, + .release = idmouse_release, + .llseek = default_llseek, +}; + +/* class driver information */ +static struct usb_class_driver idmouse_class = { + .name = "idmouse%d", + .fops = &idmouse_fops, + .minor_base = USB_IDMOUSE_MINOR_BASE, +}; + +/* usb specific object needed to register this driver with the usb subsystem */ +static struct usb_driver idmouse_driver = { + .name = DRIVER_SHORT, + .probe = idmouse_probe, + .disconnect = idmouse_disconnect, + .suspend = idmouse_suspend, + .resume = idmouse_resume, + .reset_resume = idmouse_resume, + .id_table = idmouse_table, + .supports_autosuspend = 1, +}; + +static int idmouse_create_image(struct usb_idmouse *dev) +{ + int bytes_read; + int bulk_read; + int result; + + memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1); + bytes_read = sizeof(HEADER)-1; + + /* reset the device and set a fast blink rate */ + result = ftip_command(dev, FTIP_RELEASE, 0, 0); + if (result < 0) + goto reset; + result = ftip_command(dev, FTIP_BLINK, 1, 0); + if (result < 0) + goto reset; + + /* initialize the sensor - sending this command twice */ + /* significantly reduces the rate of failed reads */ + result = ftip_command(dev, FTIP_ACQUIRE, 0, 0); + if (result < 0) + goto reset; + result = ftip_command(dev, FTIP_ACQUIRE, 0, 0); + if (result < 0) + goto reset; + + /* start the readout - sending this command twice */ + /* presumably enables the high dynamic range mode */ + result = ftip_command(dev, FTIP_RESET, 0, 0); + if (result < 0) + goto reset; + result = ftip_command(dev, FTIP_RESET, 0, 0); + if (result < 0) + goto reset; + + /* loop over a blocking bulk read to get data from the device */ + while (bytes_read < IMGSIZE) { + result = usb_bulk_msg(dev->udev, + usb_rcvbulkpipe(dev->udev, dev->bulk_in_endpointAddr), + dev->bulk_in_buffer + bytes_read, + dev->bulk_in_size, &bulk_read, 5000); + if (result < 0) { + /* Maybe this error was caused by the increased packet size? */ + /* Reset to the original value and tell userspace to retry. */ + if (dev->bulk_in_size != dev->orig_bi_size) { + dev->bulk_in_size = dev->orig_bi_size; + result = -EAGAIN; + } + break; + } + if (signal_pending(current)) { + result = -EINTR; + break; + } + bytes_read += bulk_read; + } + + /* check for valid image */ + /* right border should be black (0x00) */ + for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH) + if (dev->bulk_in_buffer[bytes_read] != 0x00) + return -EAGAIN; + + /* lower border should be white (0xFF) */ + for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++) + if (dev->bulk_in_buffer[bytes_read] != 0xFF) + return -EAGAIN; + + /* reset the device */ +reset: + ftip_command(dev, FTIP_RELEASE, 0, 0); + + /* should be IMGSIZE == 65040 */ + dev_dbg(&dev->interface->dev, "read %d bytes fingerprint data\n", + bytes_read); + return result; +} + +/* PM operations are nops as this driver does IO only during open() */ +static int idmouse_suspend(struct usb_interface *intf, pm_message_t message) +{ + return 0; +} + +static int idmouse_resume(struct usb_interface *intf) +{ + return 0; +} + +static inline void idmouse_delete(struct usb_idmouse *dev) +{ + kfree(dev->bulk_in_buffer); + kfree(dev); +} + +static int idmouse_open(struct inode *inode, struct file *file) +{ + struct usb_idmouse *dev; + struct usb_interface *interface; + int result; + + /* get the interface from minor number and driver information */ + interface = usb_find_interface(&idmouse_driver, iminor(inode)); + if (!interface) + return -ENODEV; + + /* get the device information block from the interface */ + dev = usb_get_intfdata(interface); + if (!dev) + return -ENODEV; + + /* lock this device */ + mutex_lock(&dev->lock); + + /* check if already open */ + if (dev->open) { + + /* already open, so fail */ + result = -EBUSY; + + } else { + + /* create a new image and check for success */ + result = usb_autopm_get_interface(interface); + if (result) + goto error; + result = idmouse_create_image(dev); + usb_autopm_put_interface(interface); + if (result) + goto error; + + /* increment our usage count for the driver */ + ++dev->open; + + /* save our object in the file's private structure */ + file->private_data = dev; + + } + +error: + + /* unlock this device */ + mutex_unlock(&dev->lock); + return result; +} + +static int idmouse_release(struct inode *inode, struct file *file) +{ + struct usb_idmouse *dev; + + dev = file->private_data; + + if (dev == NULL) + return -ENODEV; + + /* lock our device */ + mutex_lock(&dev->lock); + + --dev->open; + + if (!dev->present) { + /* the device was unplugged before the file was released */ + mutex_unlock(&dev->lock); + idmouse_delete(dev); + } else { + mutex_unlock(&dev->lock); + } + return 0; +} + +static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count, + loff_t * ppos) +{ + struct usb_idmouse *dev = file->private_data; + int result; + + /* lock this object */ + mutex_lock(&dev->lock); + + /* verify that the device wasn't unplugged */ + if (!dev->present) { + mutex_unlock(&dev->lock); + return -ENODEV; + } + + result = simple_read_from_buffer(buffer, count, ppos, + dev->bulk_in_buffer, IMGSIZE); + /* unlock the device */ + mutex_unlock(&dev->lock); + return result; +} + +static int idmouse_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct usb_device *udev = interface_to_usbdev(interface); + struct usb_idmouse *dev; + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + int result; + + /* check if we have gotten the data or the hid interface */ + iface_desc = interface->cur_altsetting; + if (iface_desc->desc.bInterfaceClass != 0x0A) + return -ENODEV; + + if (iface_desc->desc.bNumEndpoints < 1) + return -ENODEV; + + /* allocate memory for our device state and initialize it */ + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (dev == NULL) + return -ENOMEM; + + mutex_init(&dev->lock); + dev->udev = udev; + dev->interface = interface; + + /* set up the endpoint information - use only the first bulk-in endpoint */ + result = usb_find_bulk_in_endpoint(iface_desc, &endpoint); + if (result) { + dev_err(&interface->dev, "Unable to find bulk-in endpoint.\n"); + idmouse_delete(dev); + return result; + } + + dev->orig_bi_size = usb_endpoint_maxp(endpoint); + dev->bulk_in_size = 0x200; /* works _much_ faster */ + dev->bulk_in_endpointAddr = endpoint->bEndpointAddress; + dev->bulk_in_buffer = kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL); + if (!dev->bulk_in_buffer) { + idmouse_delete(dev); + return -ENOMEM; + } + + /* allow device read, write and ioctl */ + dev->present = 1; + + /* we can register the device now, as it is ready */ + usb_set_intfdata(interface, dev); + result = usb_register_dev(interface, &idmouse_class); + if (result) { + /* something prevented us from registering this device */ + dev_err(&interface->dev, "Unable to allocate minor number.\n"); + idmouse_delete(dev); + return result; + } + + /* be noisy */ + dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC); + + return 0; +} + +static void idmouse_disconnect(struct usb_interface *interface) +{ + struct usb_idmouse *dev = usb_get_intfdata(interface); + + /* give back our minor */ + usb_deregister_dev(interface, &idmouse_class); + + /* lock the device */ + mutex_lock(&dev->lock); + + /* prevent device read, write and ioctl */ + dev->present = 0; + + /* if the device is opened, idmouse_release will clean this up */ + if (!dev->open) { + mutex_unlock(&dev->lock); + idmouse_delete(dev); + } else { + /* unlock */ + mutex_unlock(&dev->lock); + } + + dev_info(&interface->dev, "disconnected\n"); +} + +module_usb_driver(idmouse_driver); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + |