| /****************************************************************************** |
| * mtouchusb.c -- Driver for Microtouch (Now 3M) USB Touchscreens |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of the |
| * License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * Based upon original work by Radoslaw Garbacz (usb-support@ite.pl) |
| * (http://freshmeat.net/projects/3mtouchscreendriver) |
| * |
| * History |
| * |
| * 0.3 & 0.4 2002 (TEJ) tejohnson@yahoo.com |
| * Updated to 2.4.18, then 2.4.19 |
| * Old version still relied on stealing a minor |
| * |
| * 0.5 02/26/2004 (TEJ) tejohnson@yahoo.com |
| * Complete rewrite using Linux Input in 2.6.3 |
| * Unfortunately no calibration support at this time |
| * |
| * 1.4 04/25/2004 (TEJ) tejohnson@yahoo.com |
| * Changed reset from standard USB dev reset to vendor reset |
| * Changed data sent to host from compensated to raw coordinates |
| * Eliminated vendor/product module params |
| * Performed multiple successfull tests with an EXII-5010UC |
| * |
| *****************************************************************************/ |
| |
| #include <linux/config.h> |
| |
| #ifdef CONFIG_USB_DEBUG |
| #define DEBUG |
| #else |
| #undef DEBUG |
| #endif |
| |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/input.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/usb.h> |
| |
| #define MTOUCHUSB_MIN_XC 0x0 |
| #define MTOUCHUSB_MAX_XC 0x4000 |
| #define MTOUCHUSB_XC_FUZZ 0x0 |
| #define MTOUCHUSB_XC_FLAT 0x0 |
| #define MTOUCHUSB_MIN_YC 0x0 |
| #define MTOUCHUSB_MAX_YC 0x4000 |
| #define MTOUCHUSB_YC_FUZZ 0x0 |
| #define MTOUCHUSB_YC_FLAT 0x0 |
| |
| #define MTOUCHUSB_ASYNC_REPORT 1 |
| #define MTOUCHUSB_RESET 7 |
| #define MTOUCHUSB_REPORT_DATA_SIZE 11 |
| #define MTOUCHUSB_REQ_CTRLLR_ID 10 |
| |
| #define MTOUCHUSB_GET_XC(data) (data[8]<<8 | data[7]) |
| #define MTOUCHUSB_GET_YC(data) (data[10]<<8 | data[9]) |
| #define MTOUCHUSB_GET_TOUCHED(data) ((data[2] & 0x40) ? 1:0) |
| |
| #define DRIVER_VERSION "v1.4" |
| #define DRIVER_AUTHOR "Todd E. Johnson, tejohnson@yahoo.com" |
| #define DRIVER_DESC "3M USB Touchscreen Driver" |
| #define DRIVER_LICENSE "GPL" |
| |
| struct mtouch_usb { |
| unsigned char *data; |
| dma_addr_t data_dma; |
| struct urb *irq; |
| struct usb_device *udev; |
| struct input_dev input; |
| int open; |
| char name[128]; |
| char phys[64]; |
| }; |
| |
| static struct usb_device_id mtouchusb_devices [] = { |
| { USB_DEVICE(0x0596, 0x0001) }, |
| { } |
| }; |
| |
| static void mtouchusb_irq(struct urb *urb, struct pt_regs *regs) |
| { |
| struct mtouch_usb *mtouch = urb->context; |
| int retval; |
| |
| switch (urb->status) { |
| case 0: |
| /* success */ |
| break; |
| case -ETIMEDOUT: |
| /* this urb is timing out */ |
| dbg("%s - urb timed out - was the device unplugged?", |
| __FUNCTION__); |
| return; |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| /* this urb is terminated, clean up */ |
| dbg("%s - urb shutting down with status: %d", |
| __FUNCTION__, urb->status); |
| return; |
| default: |
| dbg("%s - nonzero urb status received: %d", |
| __FUNCTION__, urb->status); |
| goto exit; |
| } |
| |
| input_regs(&mtouch->input, regs); |
| input_report_key(&mtouch->input, BTN_TOUCH, |
| MTOUCHUSB_GET_TOUCHED(mtouch->data)); |
| input_report_abs(&mtouch->input, ABS_X, |
| MTOUCHUSB_GET_XC(mtouch->data)); |
| input_report_abs(&mtouch->input, ABS_Y, |
| MTOUCHUSB_GET_YC(mtouch->data)); |
| input_sync(&mtouch->input); |
| |
| exit: |
| retval = usb_submit_urb (urb, GFP_ATOMIC); |
| if (retval) |
| err ("%s - usb_submit_urb failed with result: %d", |
| __FUNCTION__, retval); |
| } |
| |
| static int mtouchusb_open (struct input_dev *input) |
| { |
| struct mtouch_usb *mtouch = input->private; |
| |
| if (mtouch->open++) |
| return 0; |
| |
| mtouch->irq->dev = mtouch->udev; |
| |
| if (usb_submit_urb (mtouch->irq, GFP_ATOMIC)) { |
| mtouch->open--; |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static void mtouchusb_close (struct input_dev *input) |
| { |
| struct mtouch_usb *mtouch = input->private; |
| |
| if (!--mtouch->open) |
| usb_kill_urb (mtouch->irq); |
| } |
| |
| static int mtouchusb_alloc_buffers(struct usb_device *udev, struct mtouch_usb *mtouch) |
| { |
| dbg("%s - called", __FUNCTION__); |
| |
| mtouch->data = usb_buffer_alloc(udev, MTOUCHUSB_REPORT_DATA_SIZE, |
| SLAB_ATOMIC, &mtouch->data_dma); |
| |
| if (!mtouch->data) |
| return -1; |
| |
| return 0; |
| } |
| |
| static void mtouchusb_free_buffers(struct usb_device *udev, struct mtouch_usb *mtouch) |
| { |
| dbg("%s - called", __FUNCTION__); |
| |
| if (mtouch->data) |
| usb_buffer_free(udev, MTOUCHUSB_REPORT_DATA_SIZE, |
| mtouch->data, mtouch->data_dma); |
| } |
| |
| static int mtouchusb_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| { |
| struct mtouch_usb *mtouch; |
| struct usb_host_interface *interface; |
| struct usb_endpoint_descriptor *endpoint; |
| struct usb_device *udev = interface_to_usbdev (intf); |
| char path[64]; |
| char *buf; |
| int nRet; |
| |
| dbg("%s - called", __FUNCTION__); |
| |
| dbg("%s - setting interface", __FUNCTION__); |
| interface = intf->cur_altsetting; |
| |
| dbg("%s - setting endpoint", __FUNCTION__); |
| endpoint = &interface->endpoint[0].desc; |
| |
| if (!(mtouch = kmalloc (sizeof (struct mtouch_usb), GFP_KERNEL))) { |
| err("%s - Out of memory.", __FUNCTION__); |
| return -ENOMEM; |
| } |
| |
| memset(mtouch, 0, sizeof(struct mtouch_usb)); |
| mtouch->udev = udev; |
| |
| dbg("%s - allocating buffers", __FUNCTION__); |
| if (mtouchusb_alloc_buffers(udev, mtouch)) { |
| mtouchusb_free_buffers(udev, mtouch); |
| kfree(mtouch); |
| return -ENOMEM; |
| } |
| |
| mtouch->input.private = mtouch; |
| mtouch->input.open = mtouchusb_open; |
| mtouch->input.close = mtouchusb_close; |
| |
| usb_make_path(udev, path, 64); |
| sprintf(mtouch->phys, "%s/input0", path); |
| |
| mtouch->input.name = mtouch->name; |
| mtouch->input.phys = mtouch->phys; |
| mtouch->input.id.bustype = BUS_USB; |
| mtouch->input.id.vendor = le16_to_cpu(udev->descriptor.idVendor); |
| mtouch->input.id.product = le16_to_cpu(udev->descriptor.idProduct); |
| mtouch->input.id.version = le16_to_cpu(udev->descriptor.bcdDevice); |
| mtouch->input.dev = &intf->dev; |
| |
| mtouch->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); |
| mtouch->input.absbit[0] = BIT(ABS_X) | BIT(ABS_Y); |
| mtouch->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); |
| |
| /* Used to Scale Compensated Data and Flip Y */ |
| mtouch->input.absmin[ABS_X] = MTOUCHUSB_MIN_XC; |
| mtouch->input.absmax[ABS_X] = MTOUCHUSB_MAX_XC; |
| mtouch->input.absfuzz[ABS_X] = MTOUCHUSB_XC_FUZZ; |
| mtouch->input.absflat[ABS_X] = MTOUCHUSB_XC_FLAT; |
| mtouch->input.absmin[ABS_Y] = MTOUCHUSB_MIN_YC; |
| mtouch->input.absmax[ABS_Y] = MTOUCHUSB_MAX_YC; |
| mtouch->input.absfuzz[ABS_Y] = MTOUCHUSB_YC_FUZZ; |
| mtouch->input.absflat[ABS_Y] = MTOUCHUSB_YC_FLAT; |
| |
| if (!(buf = kmalloc(63, GFP_KERNEL))) { |
| kfree(mtouch); |
| return -ENOMEM; |
| } |
| |
| if (udev->descriptor.iManufacturer && |
| usb_string(udev, udev->descriptor.iManufacturer, buf, 63) > 0) |
| strcat(mtouch->name, buf); |
| if (udev->descriptor.iProduct && |
| usb_string(udev, udev->descriptor.iProduct, buf, 63) > 0) |
| sprintf(mtouch->name, "%s %s", mtouch->name, buf); |
| |
| if (!strlen(mtouch->name)) |
| sprintf(mtouch->name, "USB Touchscreen %04x:%04x", |
| mtouch->input.id.vendor, mtouch->input.id.product); |
| |
| kfree(buf); |
| |
| nRet = usb_control_msg(mtouch->udev, |
| usb_rcvctrlpipe(udev, 0), |
| MTOUCHUSB_RESET, |
| USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 1, |
| 0, |
| NULL, |
| 0, |
| HZ * USB_CTRL_SET_TIMEOUT); |
| dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d", |
| __FUNCTION__, nRet); |
| |
| dbg("%s - usb_alloc_urb: mtouch->irq", __FUNCTION__); |
| mtouch->irq = usb_alloc_urb(0, GFP_KERNEL); |
| if (!mtouch->irq) { |
| dbg("%s - usb_alloc_urb failed: mtouch->irq", __FUNCTION__); |
| mtouchusb_free_buffers(udev, mtouch); |
| kfree(mtouch); |
| return -ENOMEM; |
| } |
| |
| dbg("%s - usb_fill_int_urb", __FUNCTION__); |
| usb_fill_int_urb(mtouch->irq, |
| mtouch->udev, |
| usb_rcvintpipe(mtouch->udev, 0x81), |
| mtouch->data, |
| MTOUCHUSB_REPORT_DATA_SIZE, |
| mtouchusb_irq, |
| mtouch, |
| endpoint->bInterval); |
| |
| dbg("%s - input_register_device", __FUNCTION__); |
| input_register_device(&mtouch->input); |
| |
| nRet = usb_control_msg(mtouch->udev, |
| usb_rcvctrlpipe(udev, 0), |
| MTOUCHUSB_ASYNC_REPORT, |
| USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 1, |
| 1, |
| NULL, |
| 0, |
| HZ * USB_CTRL_SET_TIMEOUT); |
| dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d", |
| __FUNCTION__, nRet); |
| |
| printk(KERN_INFO "input: %s on %s\n", mtouch->name, path); |
| usb_set_intfdata(intf, mtouch); |
| |
| return 0; |
| } |
| |
| static void mtouchusb_disconnect(struct usb_interface *intf) |
| { |
| struct mtouch_usb *mtouch = usb_get_intfdata (intf); |
| |
| dbg("%s - called", __FUNCTION__); |
| usb_set_intfdata(intf, NULL); |
| if (mtouch) { |
| dbg("%s - mtouch is initialized, cleaning up", __FUNCTION__); |
| usb_kill_urb(mtouch->irq); |
| input_unregister_device(&mtouch->input); |
| usb_free_urb(mtouch->irq); |
| mtouchusb_free_buffers(interface_to_usbdev(intf), mtouch); |
| kfree(mtouch); |
| } |
| } |
| |
| MODULE_DEVICE_TABLE (usb, mtouchusb_devices); |
| |
| static struct usb_driver mtouchusb_driver = { |
| .owner = THIS_MODULE, |
| .name = "mtouchusb", |
| .probe = mtouchusb_probe, |
| .disconnect = mtouchusb_disconnect, |
| .id_table = mtouchusb_devices, |
| }; |
| |
| static int __init mtouchusb_init(void) { |
| dbg("%s - called", __FUNCTION__); |
| return usb_register(&mtouchusb_driver); |
| } |
| |
| static void __exit mtouchusb_cleanup(void) { |
| dbg("%s - called", __FUNCTION__); |
| usb_deregister(&mtouchusb_driver); |
| } |
| |
| module_init(mtouchusb_init); |
| module_exit(mtouchusb_cleanup); |
| |
| MODULE_AUTHOR( DRIVER_AUTHOR ); |
| MODULE_DESCRIPTION( DRIVER_DESC ); |
| MODULE_LICENSE("GPL"); |
