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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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/* * 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 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; }
error = usb_find_int_in_endpoint(intf->cur_altsetting, &ep); if (error) return -ENODEV;
synusb = kzalloc_obj(*synusb); 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) strscpy(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");