Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 404 insertions, 0 deletions

diff --git a/drivers/usb/misc/usblcd.c b/drivers/usb/misc/usblcd.c
new file mode 100644
index 000000000000..096ab3029676
--- /dev/null
+++ b/drivers/usb/misc/usblcd.c
@@ -0,0 +1,404 @@
+/*****************************************************************************
+ *                          USBLCD Kernel Driver                             *
+ *                            Version 1.05                                   *
+ *             (C) 2005 Georges Toth <g.toth@e-biz.lu>                       *
+ *                                                                           *
+ *     This file is licensed under the GPL. See COPYING in the package.      *
+ * Based on usb-skeleton.c 2.0 by Greg Kroah-Hartman (greg@kroah.com)        *
+ *                                                                           *
+ *                                                                           *
+ * 28.02.05 Complete rewrite of the original usblcd.c driver,                *
+ *          based on usb_skeleton.c.                                         *
+ *          This new driver allows more than one USB-LCD to be connected     *
+ *          and controlled, at once                                          *
+ *****************************************************************************/
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+#include <linux/usb.h>
+
+#define DRIVER_VERSION "USBLCD Driver Version 1.05"
+
+#define USBLCD_MINOR            144
+
+#define IOCTL_GET_HARD_VERSION  1
+#define IOCTL_GET_DRV_VERSION   2
+
+
+static struct usb_device_id id_table [] = {
+        { .idVendor = 0x10D2, .match_flags = USB_DEVICE_ID_MATCH_VENDOR, },
+        { },
+};
+MODULE_DEVICE_TABLE (usb, id_table);
+
+
+struct usb_lcd {
+        struct usb_device *     udev;                   /* init: probe_lcd */
+        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 size of the receive buffer */
+        __u8                    bulk_in_endpointAddr;   /* the address of the bulk in endpoint */
+        __u8                    bulk_out_endpointAddr;  /* the address of the bulk out endpoint */
+        struct kref             kref;
+};
+#define to_lcd_dev(d) container_of(d, struct usb_lcd, kref)
+
+static struct usb_driver lcd_driver;
+
+
+static void lcd_delete(struct kref *kref)
+{
+        struct usb_lcd *dev = to_lcd_dev(kref);
+
+        usb_put_dev(dev->udev);
+        kfree (dev->bulk_in_buffer);
+        kfree (dev);
+}
+
+
+static int lcd_open(struct inode *inode, struct file *file)
+{
+        struct usb_lcd *dev;
+        struct usb_interface *interface;
+        int subminor;
+        int retval = 0;
+
+        subminor = iminor(inode);
+
+        interface = usb_find_interface(&lcd_driver, subminor);
+        if (!interface) {
+                err ("USBLCD: %s - error, can't find device for minor %d",
+                     __FUNCTION__, subminor);
+                retval = -ENODEV;
+                goto exit;
+        }
+
+        dev = usb_get_intfdata(interface);
+        if (!dev) {
+                retval = -ENODEV;
+                goto exit;
+        }
+
+        /* increment our usage count for the device */
+        kref_get(&dev->kref);
+
+        /* save our object in the file's private structure */
+        file->private_data = dev;
+
+exit:
+        return retval;
+}
+
+static int lcd_release(struct inode *inode, struct file *file)
+{
+        struct usb_lcd *dev;
+
+        dev = (struct usb_lcd *)file->private_data;
+        if (dev == NULL)
+                return -ENODEV;
+
+        /* decrement the count on our device */
+        kref_put(&dev->kref, lcd_delete);
+        return 0;
+}
+
+static ssize_t lcd_read(struct file *file, char __user * buffer, size_t count, loff_t *ppos)
+{
+        struct usb_lcd *dev;
+        int retval = 0;
+        int bytes_read;
+
+        dev = (struct usb_lcd *)file->private_data;
+
+        /* do a blocking bulk read to get data from the device */
+        retval = usb_bulk_msg(dev->udev, 
+                              usb_rcvbulkpipe(dev->udev, dev->bulk_in_endpointAddr),
+                              dev->bulk_in_buffer,
+                              min(dev->bulk_in_size, count),
+                              &bytes_read, 10000);
+
+        /* if the read was successful, copy the data to userspace */
+        if (!retval) {
+                if (copy_to_user(buffer, dev->bulk_in_buffer, bytes_read))
+                        retval = -EFAULT;
+                else
+                        retval = bytes_read;
+        }
+
+        return retval;
+}
+
+static int lcd_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+        struct usb_lcd *dev;
+        u16 bcdDevice;
+        char buf[30];
+
+        dev = (struct usb_lcd *)file->private_data;
+        if (dev == NULL)
+                return -ENODEV;
+        
+        switch (cmd) {
+        case IOCTL_GET_HARD_VERSION:
+                bcdDevice = le16_to_cpu((dev->udev)->descriptor.bcdDevice);
+                sprintf(buf,"%1d%1d.%1d%1d",
+                        (bcdDevice & 0xF000)>>12,
+                        (bcdDevice & 0xF00)>>8,
+                        (bcdDevice & 0xF0)>>4,
+                        (bcdDevice & 0xF));
+                if (copy_to_user((void __user *)arg,buf,strlen(buf))!=0)
+                        return -EFAULT;
+                break;
+        case IOCTL_GET_DRV_VERSION:
+                sprintf(buf,DRIVER_VERSION);
+                if (copy_to_user((void __user *)arg,buf,strlen(buf))!=0)
+                        return -EFAULT;
+                break;
+        default:
+                return -ENOTTY;
+                break;
+        }
+
+        return 0;
+}
+
+static void lcd_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
+{
+        struct usb_lcd *dev;
+
+        dev = (struct usb_lcd *)urb->context;
+
+        /* sync/async unlink faults aren't errors */
+        if (urb->status &&
+            !(urb->status == -ENOENT ||
+              urb->status == -ECONNRESET ||
+              urb->status == -ESHUTDOWN)) {
+                dbg("USBLCD: %s - nonzero write bulk status received: %d",
+                    __FUNCTION__, urb->status);
+        }
+
+        /* free up our allocated buffer */
+        usb_buffer_free(urb->dev, urb->transfer_buffer_length,
+                        urb->transfer_buffer, urb->transfer_dma);
+}
+
+static ssize_t lcd_write(struct file *file, const char __user * user_buffer, size_t count, loff_t *ppos)
+{
+        struct usb_lcd *dev;
+        int retval = 0;
+        struct urb *urb = NULL;
+        char *buf = NULL;
+        
+        dev = (struct usb_lcd *)file->private_data;
+        
+        /* verify that we actually have some data to write */
+        if (count == 0)
+                goto exit;
+
+        /* create a urb, and a buffer for it, and copy the data to the urb */
+        urb = usb_alloc_urb(0, GFP_KERNEL);
+        if (!urb) {
+                retval = -ENOMEM;
+                goto error;
+        }
+        
+        buf = usb_buffer_alloc(dev->udev, count, GFP_KERNEL, &urb->transfer_dma);
+        if (!buf) {
+                retval = -ENOMEM;
+                goto error;
+        }
+        
+        if (copy_from_user(buf, user_buffer, count)) {
+                retval = -EFAULT;
+                goto error;
+        }
+        
+        /* initialize the urb properly */
+        usb_fill_bulk_urb(urb, dev->udev,
+                          usb_sndbulkpipe(dev->udev, dev->bulk_out_endpointAddr),
+                          buf, count, lcd_write_bulk_callback, dev);
+        urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+        
+        /* send the data out the bulk port */
+        retval = usb_submit_urb(urb, GFP_KERNEL);
+        if (retval) {
+                err("USBLCD: %s - failed submitting write urb, error %d", __FUNCTION__, retval);
+                goto error;
+        }
+        
+        /* release our reference to this urb, the USB core will eventually free it entirely */
+        usb_free_urb(urb);
+
+exit:
+        return count;
+
+error:
+        usb_buffer_free(dev->udev, count, buf, urb->transfer_dma);
+        usb_free_urb(urb);
+        return retval;
+}
+
+static struct file_operations lcd_fops = {
+        .owner =        THIS_MODULE,
+        .read =         lcd_read,
+        .write =        lcd_write,
+        .open =         lcd_open,
+        .ioctl =        lcd_ioctl,
+        .release =      lcd_release,
+};
+
+/*
+ *  * usb class driver info in order to get a minor number from the usb core,
+ *   * and to have the device registered with devfs and the driver core
+ *    */
+static struct usb_class_driver lcd_class = {
+        .name =         "usb/lcd%d",
+        .fops =         &lcd_fops,
+        .mode =         S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH,
+        .minor_base =   USBLCD_MINOR,
+};
+
+static int lcd_probe(struct usb_interface *interface, const struct usb_device_id *id)
+{
+        struct usb_lcd *dev = NULL;
+        struct usb_host_interface *iface_desc;
+        struct usb_endpoint_descriptor *endpoint;
+        size_t buffer_size;
+        int i;
+        int retval = -ENOMEM;
+
+        /* allocate memory for our device state and initialize it */
+        dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+        if (dev == NULL) {
+                err("Out of memory");
+                goto error;
+        }
+        memset(dev, 0x00, sizeof(*dev));
+        kref_init(&dev->kref);
+
+        dev->udev = usb_get_dev(interface_to_usbdev(interface));
+        dev->interface = interface;
+
+        if (le16_to_cpu(dev->udev->descriptor.idProduct) != 0x0001) {
+                warn(KERN_INFO "USBLCD model not supported.");
+                return -ENODEV;
+        }
+        
+        /* set up the endpoint information */
+        /* use only the first bulk-in and bulk-out endpoints */
+        iface_desc = interface->cur_altsetting;
+        for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
+                endpoint = &iface_desc->endpoint[i].desc;
+
+                if (!dev->bulk_in_endpointAddr &&
+                    (endpoint->bEndpointAddress & USB_DIR_IN) &&
+                    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
+                                        == USB_ENDPOINT_XFER_BULK)) {
+                        /* we found a bulk in endpoint */
+                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                        dev->bulk_in_size = buffer_size;
+                        dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
+                        dev->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
+                        if (!dev->bulk_in_buffer) {
+                                err("Could not allocate bulk_in_buffer");
+                                goto error;
+                        }
+                }
+
+                if (!dev->bulk_out_endpointAddr &&
+                    !(endpoint->bEndpointAddress & USB_DIR_IN) &&
+                    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
+                                        == USB_ENDPOINT_XFER_BULK)) {
+                        /* we found a bulk out endpoint */
+                        dev->bulk_out_endpointAddr = endpoint->bEndpointAddress;
+                }
+        }
+        if (!(dev->bulk_in_endpointAddr && dev->bulk_out_endpointAddr)) {
+                err("Could not find both bulk-in and bulk-out endpoints");
+                goto error;
+        }
+
+        /* save our data pointer in this interface device */
+        usb_set_intfdata(interface, dev);
+
+        /* we can register the device now, as it is ready */
+        retval = usb_register_dev(interface, &lcd_class);
+        if (retval) {
+                /* something prevented us from registering this driver */
+                err("Not able to get a minor for this device.");
+                usb_set_intfdata(interface, NULL);
+                goto error;
+        }
+
+        i = le16_to_cpu(dev->udev->descriptor.bcdDevice);
+
+        info("USBLCD Version %1d%1d.%1d%1d found at address %d",
+                (i & 0xF000)>>12,(i & 0xF00)>>8,(i & 0xF0)>>4,(i & 0xF),
+                dev->udev->devnum);
+
+        /* let the user know what node this device is now attached to */
+        info("USB LCD device now attached to USBLCD-%d", interface->minor);
+        return 0;
+
+error:
+        if (dev)
+                kref_put(&dev->kref, lcd_delete);
+        return retval;
+}
+
+static void lcd_disconnect(struct usb_interface *interface)
+{
+        struct usb_lcd *dev;
+        int minor = interface->minor;
+
+        /* prevent skel_open() from racing skel_disconnect() */
+        lock_kernel();
+
+        dev = usb_get_intfdata(interface);
+        usb_set_intfdata(interface, NULL);
+
+        /* give back our minor */
+        usb_deregister_dev(interface, &lcd_class);
+ 
+        unlock_kernel();
+
+        /* decrement our usage count */
+        kref_put(&dev->kref, lcd_delete);
+
+        info("USB LCD #%d now disconnected", minor);
+}
+
+static struct usb_driver lcd_driver = {
+        .owner =        THIS_MODULE,
+        .name =         "usblcd",
+        .probe =        lcd_probe,
+        .disconnect =   lcd_disconnect,
+        .id_table =     id_table,
+};
+
+static int __init usb_lcd_init(void)
+{
+        int result;
+        
+        result = usb_register(&lcd_driver);
+        if (result)
+                err("usb_register failed. Error number %d", result);
+
+        return result;
+}
+
+
+static void __exit usb_lcd_exit(void)
+{
+        usb_deregister(&lcd_driver);
+}
+
+module_init(usb_lcd_init);
+module_exit(usb_lcd_exit);
+
+MODULE_AUTHOR("Georges Toth <g.toth@e-biz.lu>");
+MODULE_DESCRIPTION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");