| /* |
| * USB Synaptics device driver |
| * |
| * Copyright (c) 2002 Rob Miller (rob@inpharmatica . co . uk) |
| * Copyright (c) 2003 Ron Lee (ron@debian.org) |
| * cPad driver for kernel 2.4 |
| * |
| * Copyright (c) 2004 Jan Steinhoff (cpad@jan-steinhoff . de) |
| * Copyright (c) 2004 Ron Lee (ron@debian.org) |
| * rewritten for kernel 2.6 |
| * |
| * cPad display character device part is not included. It can be found at |
| * http://jan-steinhoff.de/linux/synaptics-usb.html |
| * |
| * Bases on: usb_skeleton.c v2.2 by Greg Kroah-Hartman |
| * drivers/hid/usbhid/usbmouse.c by Vojtech Pavlik |
| * drivers/input/mouse/synaptics.c by Peter Osterlund |
| * |
| * 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. |
| * |
| * Trademarks are the property of their respective owners. |
| */ |
| |
| /* |
| * There are three different types of Synaptics USB devices: Touchpads, |
| * touchsticks (or trackpoints), and touchscreens. Touchpads are well supported |
| * by this driver, touchstick support has not been tested much yet, and |
| * touchscreens have not been tested at all. |
| * |
| * Up to three alternate settings are possible: |
| * setting 0: one int endpoint for relative movement (used by usbhid.ko) |
| * setting 1: one int endpoint for absolute finger position |
| * setting 2 (cPad only): one int endpoint for absolute finger position and |
| * two bulk endpoints for the display (in/out) |
| * This driver uses setting 1. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/usb.h> |
| #include <linux/input.h> |
| #include <linux/usb/input.h> |
| |
| #define USB_VENDOR_ID_SYNAPTICS 0x06cb |
| #define USB_DEVICE_ID_SYNAPTICS_TP 0x0001 /* Synaptics USB TouchPad */ |
| #define USB_DEVICE_ID_SYNAPTICS_INT_TP 0x0002 /* Integrated USB TouchPad */ |
| #define USB_DEVICE_ID_SYNAPTICS_CPAD 0x0003 /* Synaptics cPad */ |
| #define USB_DEVICE_ID_SYNAPTICS_TS 0x0006 /* Synaptics TouchScreen */ |
| #define USB_DEVICE_ID_SYNAPTICS_STICK 0x0007 /* Synaptics USB Styk */ |
| #define USB_DEVICE_ID_SYNAPTICS_WP 0x0008 /* Synaptics USB WheelPad */ |
| #define USB_DEVICE_ID_SYNAPTICS_COMP_TP 0x0009 /* Composite USB TouchPad */ |
| #define USB_DEVICE_ID_SYNAPTICS_WTP 0x0010 /* Wireless TouchPad */ |
| #define USB_DEVICE_ID_SYNAPTICS_DPAD 0x0013 /* DisplayPad */ |
| |
| #define SYNUSB_TOUCHPAD (1 << 0) |
| #define SYNUSB_STICK (1 << 1) |
| #define SYNUSB_TOUCHSCREEN (1 << 2) |
| #define SYNUSB_AUXDISPLAY (1 << 3) /* For cPad */ |
| #define SYNUSB_COMBO (1 << 4) /* Composite device (TP + stick) */ |
| #define SYNUSB_IO_ALWAYS (1 << 5) |
| |
| #define USB_DEVICE_SYNAPTICS(prod, kind) \ |
| USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, \ |
| USB_DEVICE_ID_SYNAPTICS_##prod), \ |
| .driver_info = (kind), |
| |
| #define SYNUSB_RECV_SIZE 8 |
| |
| #define XMIN_NOMINAL 1472 |
| #define XMAX_NOMINAL 5472 |
| #define YMIN_NOMINAL 1408 |
| #define YMAX_NOMINAL 4448 |
| |
| struct synusb { |
| struct usb_device *udev; |
| struct usb_interface *intf; |
| struct urb *urb; |
| unsigned char *data; |
| |
| /* serialize access to open/suspend */ |
| struct mutex pm_mutex; |
| bool is_open; |
| |
| /* input device related data structures */ |
| struct input_dev *input; |
| char name[128]; |
| char phys[64]; |
| |
| /* characteristics of the device */ |
| unsigned long flags; |
| }; |
| |
| static void synusb_report_buttons(struct synusb *synusb) |
| { |
| struct input_dev *input_dev = synusb->input; |
| |
| input_report_key(input_dev, BTN_LEFT, synusb->data[1] & 0x04); |
| input_report_key(input_dev, BTN_RIGHT, synusb->data[1] & 0x01); |
| input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x02); |
| } |
| |
| static void synusb_report_stick(struct synusb *synusb) |
| { |
| struct input_dev *input_dev = synusb->input; |
| int x, y; |
| unsigned int pressure; |
| |
| pressure = synusb->data[6]; |
| x = (s16)(be16_to_cpup((__be16 *)&synusb->data[2]) << 3) >> 7; |
| y = (s16)(be16_to_cpup((__be16 *)&synusb->data[4]) << 3) >> 7; |
| |
| if (pressure > 0) { |
| input_report_rel(input_dev, REL_X, x); |
| input_report_rel(input_dev, REL_Y, -y); |
| } |
| |
| input_report_abs(input_dev, ABS_PRESSURE, pressure); |
| |
| synusb_report_buttons(synusb); |
| |
| input_sync(input_dev); |
| } |
| |
| static void synusb_report_touchpad(struct synusb *synusb) |
| { |
| struct input_dev *input_dev = synusb->input; |
| unsigned int num_fingers, tool_width; |
| unsigned int x, y; |
| unsigned int pressure, w; |
| |
| pressure = synusb->data[6]; |
| x = be16_to_cpup((__be16 *)&synusb->data[2]); |
| y = be16_to_cpup((__be16 *)&synusb->data[4]); |
| w = synusb->data[0] & 0x0f; |
| |
| if (pressure > 0) { |
| num_fingers = 1; |
| tool_width = 5; |
| switch (w) { |
| case 0 ... 1: |
| num_fingers = 2 + w; |
| break; |
| |
| case 2: /* pen, pretend its a finger */ |
| break; |
| |
| case 4 ... 15: |
| tool_width = w; |
| break; |
| } |
| } else { |
| num_fingers = 0; |
| tool_width = 0; |
| } |
| |
| /* |
| * Post events |
| * BTN_TOUCH has to be first as mousedev relies on it when doing |
| * absolute -> relative conversion |
| */ |
| |
| if (pressure > 30) |
| input_report_key(input_dev, BTN_TOUCH, 1); |
| if (pressure < 25) |
| input_report_key(input_dev, BTN_TOUCH, 0); |
| |
| if (num_fingers > 0) { |
| input_report_abs(input_dev, ABS_X, x); |
| input_report_abs(input_dev, ABS_Y, |
| YMAX_NOMINAL + YMIN_NOMINAL - y); |
| } |
| |
| input_report_abs(input_dev, ABS_PRESSURE, pressure); |
| input_report_abs(input_dev, ABS_TOOL_WIDTH, tool_width); |
| |
| input_report_key(input_dev, BTN_TOOL_FINGER, num_fingers == 1); |
| input_report_key(input_dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); |
| input_report_key(input_dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); |
| |
| synusb_report_buttons(synusb); |
| if (synusb->flags & SYNUSB_AUXDISPLAY) |
| input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x08); |
| |
| input_sync(input_dev); |
| } |
| |
| static void synusb_irq(struct urb *urb) |
| { |
| struct synusb *synusb = urb->context; |
| int error; |
| |
| /* Check our status in case we need to bail out early. */ |
| switch (urb->status) { |
| case 0: |
| usb_mark_last_busy(synusb->udev); |
| break; |
| |
| /* Device went away so don't keep trying to read from it. */ |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| return; |
| |
| default: |
| goto resubmit; |
| break; |
| } |
| |
| if (synusb->flags & SYNUSB_STICK) |
| synusb_report_stick(synusb); |
| else |
| synusb_report_touchpad(synusb); |
| |
| resubmit: |
| error = usb_submit_urb(urb, GFP_ATOMIC); |
| if (error && error != -EPERM) |
| dev_err(&synusb->intf->dev, |
| "%s - usb_submit_urb failed with result: %d", |
| __func__, error); |
| } |
| |
| static struct usb_endpoint_descriptor * |
| synusb_get_in_endpoint(struct usb_host_interface *iface) |
| { |
| |
| struct usb_endpoint_descriptor *endpoint; |
| int i; |
| |
| for (i = 0; i < iface->desc.bNumEndpoints; ++i) { |
| endpoint = &iface->endpoint[i].desc; |
| |
| if (usb_endpoint_is_int_in(endpoint)) { |
| /* we found our interrupt in endpoint */ |
| return endpoint; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static int synusb_open(struct input_dev *dev) |
| { |
| struct synusb *synusb = input_get_drvdata(dev); |
| int retval; |
| |
| retval = usb_autopm_get_interface(synusb->intf); |
| if (retval) { |
| dev_err(&synusb->intf->dev, |
| "%s - usb_autopm_get_interface failed, error: %d\n", |
| __func__, retval); |
| return retval; |
| } |
| |
| mutex_lock(&synusb->pm_mutex); |
| retval = usb_submit_urb(synusb->urb, GFP_KERNEL); |
| if (retval) { |
| dev_err(&synusb->intf->dev, |
| "%s - usb_submit_urb failed, error: %d\n", |
| __func__, retval); |
| retval = -EIO; |
| goto out; |
| } |
| |
| synusb->intf->needs_remote_wakeup = 1; |
| synusb->is_open = true; |
| |
| out: |
| mutex_unlock(&synusb->pm_mutex); |
| usb_autopm_put_interface(synusb->intf); |
| return retval; |
| } |
| |
| static void synusb_close(struct input_dev *dev) |
| { |
| struct synusb *synusb = input_get_drvdata(dev); |
| int autopm_error; |
| |
| autopm_error = usb_autopm_get_interface(synusb->intf); |
| |
| mutex_lock(&synusb->pm_mutex); |
| usb_kill_urb(synusb->urb); |
| synusb->intf->needs_remote_wakeup = 0; |
| synusb->is_open = false; |
| mutex_unlock(&synusb->pm_mutex); |
| |
| if (!autopm_error) |
| usb_autopm_put_interface(synusb->intf); |
| } |
| |
| static int synusb_probe(struct usb_interface *intf, |
| const struct usb_device_id *id) |
| { |
| struct usb_device *udev = interface_to_usbdev(intf); |
| struct usb_endpoint_descriptor *ep; |
| struct synusb *synusb; |
| struct input_dev *input_dev; |
| unsigned int intf_num = intf->cur_altsetting->desc.bInterfaceNumber; |
| unsigned int altsetting = min(intf->num_altsetting, 1U); |
| int error; |
| |
| error = usb_set_interface(udev, intf_num, altsetting); |
| if (error) { |
| dev_err(&udev->dev, |
| "Can not set alternate setting to %i, error: %i", |
| altsetting, error); |
| return error; |
| } |
| |
| ep = synusb_get_in_endpoint(intf->cur_altsetting); |
| if (!ep) |
| return -ENODEV; |
| |
| synusb = kzalloc(sizeof(*synusb), GFP_KERNEL); |
| input_dev = input_allocate_device(); |
| if (!synusb || !input_dev) { |
| error = -ENOMEM; |
| goto err_free_mem; |
| } |
| |
| synusb->udev = udev; |
| synusb->intf = intf; |
| synusb->input = input_dev; |
| mutex_init(&synusb->pm_mutex); |
| |
| synusb->flags = id->driver_info; |
| if (synusb->flags & SYNUSB_COMBO) { |
| /* |
| * This is a combo device, we need to set proper |
| * capability, depending on the interface. |
| */ |
| synusb->flags |= intf_num == 1 ? |
| SYNUSB_STICK : SYNUSB_TOUCHPAD; |
| } |
| |
| synusb->urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!synusb->urb) { |
| error = -ENOMEM; |
| goto err_free_mem; |
| } |
| |
| synusb->data = usb_alloc_coherent(udev, SYNUSB_RECV_SIZE, GFP_KERNEL, |
| &synusb->urb->transfer_dma); |
| if (!synusb->data) { |
| error = -ENOMEM; |
| goto err_free_urb; |
| } |
| |
| usb_fill_int_urb(synusb->urb, udev, |
| usb_rcvintpipe(udev, ep->bEndpointAddress), |
| synusb->data, SYNUSB_RECV_SIZE, |
| synusb_irq, synusb, |
| ep->bInterval); |
| synusb->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| |
| if (udev->manufacturer) |
| strlcpy(synusb->name, udev->manufacturer, |
| sizeof(synusb->name)); |
| |
| if (udev->product) { |
| if (udev->manufacturer) |
| strlcat(synusb->name, " ", sizeof(synusb->name)); |
| strlcat(synusb->name, udev->product, sizeof(synusb->name)); |
| } |
| |
| if (!strlen(synusb->name)) |
| snprintf(synusb->name, sizeof(synusb->name), |
| "USB Synaptics Device %04x:%04x", |
| le16_to_cpu(udev->descriptor.idVendor), |
| le16_to_cpu(udev->descriptor.idProduct)); |
| |
| if (synusb->flags & SYNUSB_STICK) |
| strlcat(synusb->name, " (Stick)", sizeof(synusb->name)); |
| |
| usb_make_path(udev, synusb->phys, sizeof(synusb->phys)); |
| strlcat(synusb->phys, "/input0", sizeof(synusb->phys)); |
| |
| input_dev->name = synusb->name; |
| input_dev->phys = synusb->phys; |
| usb_to_input_id(udev, &input_dev->id); |
| input_dev->dev.parent = &synusb->intf->dev; |
| |
| if (!(synusb->flags & SYNUSB_IO_ALWAYS)) { |
| input_dev->open = synusb_open; |
| input_dev->close = synusb_close; |
| } |
| |
| input_set_drvdata(input_dev, synusb); |
| |
| __set_bit(EV_ABS, input_dev->evbit); |
| __set_bit(EV_KEY, input_dev->evbit); |
| |
| if (synusb->flags & SYNUSB_STICK) { |
| __set_bit(EV_REL, input_dev->evbit); |
| __set_bit(REL_X, input_dev->relbit); |
| __set_bit(REL_Y, input_dev->relbit); |
| __set_bit(INPUT_PROP_POINTING_STICK, input_dev->propbit); |
| input_set_abs_params(input_dev, ABS_PRESSURE, 0, 127, 0, 0); |
| } else { |
| input_set_abs_params(input_dev, ABS_X, |
| XMIN_NOMINAL, XMAX_NOMINAL, 0, 0); |
| input_set_abs_params(input_dev, ABS_Y, |
| YMIN_NOMINAL, YMAX_NOMINAL, 0, 0); |
| input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); |
| input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); |
| __set_bit(BTN_TOUCH, input_dev->keybit); |
| __set_bit(BTN_TOOL_FINGER, input_dev->keybit); |
| __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); |
| __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); |
| } |
| |
| if (synusb->flags & SYNUSB_TOUCHSCREEN) |
| __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); |
| else |
| __set_bit(INPUT_PROP_POINTER, input_dev->propbit); |
| |
| __set_bit(BTN_LEFT, input_dev->keybit); |
| __set_bit(BTN_RIGHT, input_dev->keybit); |
| __set_bit(BTN_MIDDLE, input_dev->keybit); |
| |
| usb_set_intfdata(intf, synusb); |
| |
| if (synusb->flags & SYNUSB_IO_ALWAYS) { |
| error = synusb_open(input_dev); |
| if (error) |
| goto err_free_dma; |
| } |
| |
| error = input_register_device(input_dev); |
| if (error) { |
| dev_err(&udev->dev, |
| "Failed to register input device, error %d\n", |
| error); |
| goto err_stop_io; |
| } |
| |
| return 0; |
| |
| err_stop_io: |
| if (synusb->flags & SYNUSB_IO_ALWAYS) |
| synusb_close(synusb->input); |
| err_free_dma: |
| usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data, |
| synusb->urb->transfer_dma); |
| err_free_urb: |
| usb_free_urb(synusb->urb); |
| err_free_mem: |
| input_free_device(input_dev); |
| kfree(synusb); |
| usb_set_intfdata(intf, NULL); |
| |
| return error; |
| } |
| |
| static void synusb_disconnect(struct usb_interface *intf) |
| { |
| struct synusb *synusb = usb_get_intfdata(intf); |
| struct usb_device *udev = interface_to_usbdev(intf); |
| |
| if (synusb->flags & SYNUSB_IO_ALWAYS) |
| synusb_close(synusb->input); |
| |
| input_unregister_device(synusb->input); |
| |
| usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data, |
| synusb->urb->transfer_dma); |
| usb_free_urb(synusb->urb); |
| kfree(synusb); |
| |
| usb_set_intfdata(intf, NULL); |
| } |
| |
| static int synusb_suspend(struct usb_interface *intf, pm_message_t message) |
| { |
| struct synusb *synusb = usb_get_intfdata(intf); |
| |
| mutex_lock(&synusb->pm_mutex); |
| usb_kill_urb(synusb->urb); |
| mutex_unlock(&synusb->pm_mutex); |
| |
| return 0; |
| } |
| |
| static int synusb_resume(struct usb_interface *intf) |
| { |
| struct synusb *synusb = usb_get_intfdata(intf); |
| int retval = 0; |
| |
| mutex_lock(&synusb->pm_mutex); |
| |
| if ((synusb->is_open || (synusb->flags & SYNUSB_IO_ALWAYS)) && |
| usb_submit_urb(synusb->urb, GFP_NOIO) < 0) { |
| retval = -EIO; |
| } |
| |
| mutex_unlock(&synusb->pm_mutex); |
| |
| return retval; |
| } |
| |
| static int synusb_pre_reset(struct usb_interface *intf) |
| { |
| struct synusb *synusb = usb_get_intfdata(intf); |
| |
| mutex_lock(&synusb->pm_mutex); |
| usb_kill_urb(synusb->urb); |
| |
| return 0; |
| } |
| |
| static int synusb_post_reset(struct usb_interface *intf) |
| { |
| struct synusb *synusb = usb_get_intfdata(intf); |
| int retval = 0; |
| |
| if ((synusb->is_open || (synusb->flags & SYNUSB_IO_ALWAYS)) && |
| usb_submit_urb(synusb->urb, GFP_NOIO) < 0) { |
| retval = -EIO; |
| } |
| |
| mutex_unlock(&synusb->pm_mutex); |
| |
| return retval; |
| } |
| |
| static int synusb_reset_resume(struct usb_interface *intf) |
| { |
| return synusb_resume(intf); |
| } |
| |
| static const struct usb_device_id synusb_idtable[] = { |
| { USB_DEVICE_SYNAPTICS(TP, SYNUSB_TOUCHPAD) }, |
| { USB_DEVICE_SYNAPTICS(INT_TP, SYNUSB_TOUCHPAD) }, |
| { USB_DEVICE_SYNAPTICS(CPAD, |
| SYNUSB_TOUCHPAD | SYNUSB_AUXDISPLAY | SYNUSB_IO_ALWAYS) }, |
| { USB_DEVICE_SYNAPTICS(TS, SYNUSB_TOUCHSCREEN) }, |
| { USB_DEVICE_SYNAPTICS(STICK, SYNUSB_STICK) }, |
| { USB_DEVICE_SYNAPTICS(WP, SYNUSB_TOUCHPAD) }, |
| { USB_DEVICE_SYNAPTICS(COMP_TP, SYNUSB_COMBO) }, |
| { USB_DEVICE_SYNAPTICS(WTP, SYNUSB_TOUCHPAD) }, |
| { USB_DEVICE_SYNAPTICS(DPAD, SYNUSB_TOUCHPAD) }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(usb, synusb_idtable); |
| |
| static struct usb_driver synusb_driver = { |
| .name = "synaptics_usb", |
| .probe = synusb_probe, |
| .disconnect = synusb_disconnect, |
| .id_table = synusb_idtable, |
| .suspend = synusb_suspend, |
| .resume = synusb_resume, |
| .pre_reset = synusb_pre_reset, |
| .post_reset = synusb_post_reset, |
| .reset_resume = synusb_reset_resume, |
| .supports_autosuspend = 1, |
| }; |
| |
| module_usb_driver(synusb_driver); |
| |
| MODULE_AUTHOR("Rob Miller <rob@inpharmatica.co.uk>, " |
| "Ron Lee <ron@debian.org>, " |
| "Jan Steinhoff <cpad@jan-steinhoff.de>"); |
| MODULE_DESCRIPTION("Synaptics USB device driver"); |
| MODULE_LICENSE("GPL"); |