This commit introduces a new driver for Foxconn CNTouch trackpad that can be found on LDLC's laptop IRIS family. The driver has been inspired from usbmouse.c.
Signed-off-by: Thomas Sanchez <[email protected]> --- drivers/input/mouse/Kconfig | 11 ++ drivers/input/mouse/Makefile | 1 + drivers/input/mouse/foxconn_usb.c | 206 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 218 insertions(+) create mode 100644 drivers/input/mouse/foxconn_usb.c diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig index d8b46b0..3ccb924 100644 --- a/drivers/input/mouse/Kconfig +++ b/drivers/input/mouse/Kconfig @@ -403,4 +403,15 @@ config MOUSE_NAVPOINT_PXA27x To compile this driver as a module, choose M here: the module will be called navpoint. +config MOUSE_FOXCONN_CNTOUCH + tristate "Foxconn CNTouch USB device support" + depends on USB_ARCH_HAS_HCD + select USB + help + This driver adds support for the Foxconn CNTouch trackpad present for + instance on IRIS laptop family from LDLC. + + To compile this driver as a module, choose M here: the + module will be called foxconn_usb. + endif diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile index 560003d..4bfcc75 100644 --- a/drivers/input/mouse/Makefile +++ b/drivers/input/mouse/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_MOUSE_ATARI) += atarimouse.o obj-$(CONFIG_MOUSE_BCM5974) += bcm5974.o obj-$(CONFIG_MOUSE_CYAPA) += cyapa.o obj-$(CONFIG_MOUSE_ELAN_I2C) += elan_i2c.o +obj-$(CONFIG_MOUSE_FOXCONN_CNTOUCH) += foxconn_usb.o obj-$(CONFIG_MOUSE_GPIO) += gpio_mouse.o obj-$(CONFIG_MOUSE_INPORT) += inport.o obj-$(CONFIG_MOUSE_LOGIBM) += logibm.o diff --git a/drivers/input/mouse/foxconn_usb.c b/drivers/input/mouse/foxconn_usb.c new file mode 100644 index 0000000..4627c5c --- /dev/null +++ b/drivers/input/mouse/foxconn_usb.c @@ -0,0 +1,206 @@ +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/usb/input.h> + +#define USB_VENDOR_ID_FOXCONN 0x294e +#define USB_DEVICE_ID_FOXCONN_CNTOUCH 0x1001 + +#define DRIVER_DESC "CNTouch USB Driver" + +static const struct usb_device_id cntouch_devices[] = { + {USB_DEVICE(USB_VENDOR_ID_FOXCONN, USB_DEVICE_ID_FOXCONN_CNTOUCH)}, + {}, +}; + +MODULE_AUTHOR("Thomas Sanchez, [email protected]") +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +MODULE_DEVICE_TABLE(usb, cntouch_devices); + +struct cntouch_device { + struct usb_device *usb_dev; + struct input_dev *input_dev; + struct urb *irq; + signed char *data; + dma_addr_t data_dma; + char usb_path[64]; +}; + +static void cntouch_irq(struct urb *urb) +{ + struct cntouch_device *cn_dev = urb->context; + signed char *data = cn_dev->data; + struct input_dev *dev = cn_dev->input_dev; + int status; + + switch (urb->status) { + case 0: + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + return; + default: + goto resubmit; + } + + input_report_key(dev, BTN_LEFT, data[0] & 0x01); + input_report_key(dev, BTN_RIGHT, data[0] & 0x02); + + /* + * when scrolling horizontally with two fingers, data[4] is used but I + * did not find the right mapping... + */ + input_report_key(dev, BTN_TOOL_FINGER, data[4] == 0 ? 1 : 2); + + input_report_rel(dev, REL_X, data[1]); + input_report_rel(dev, REL_Y, data[2]); + + input_report_rel(dev, REL_WHEEL, data[3]); + + input_sync(dev); + +resubmit: + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status) { + dev_err(&cn_dev->usb_dev->dev, + "can't resubmit intr, %s-%s/input0, status %d\n", + cn_dev->usb_dev->bus->bus_name, + cn_dev->usb_dev->devpath, status); + } +} + +static int cntouch_open(struct input_dev *dev) +{ + struct cntouch_device *cn_dev = input_get_drvdata(dev); + + cn_dev->irq->dev = cn_dev->usb_dev; + if (usb_submit_urb(cn_dev->irq, GFP_KERNEL)) + return -EIO; + return 0; +} + +static void cntouch_close(struct input_dev *dev) +{ + struct cntouch_device *cn_dev = input_get_drvdata(dev); + + usb_kill_urb(cn_dev->irq); +} + +static int cntouch_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct usb_device *usb_dev = interface_to_usbdev(interface); + struct cntouch_device *cn_dev = NULL; + struct usb_host_interface *host_interface; + struct usb_endpoint_descriptor *endpoint; + int pipe, maxp; + int error = -ENOMEM; + + host_interface = interface->cur_altsetting; + + if (host_interface->desc.bNumEndpoints != 1) + return -ENODEV; + + endpoint = &host_interface->endpoint[0].desc; + if (!usb_endpoint_is_int_in(endpoint)) + return -ENODEV; + + pipe = usb_rcvintpipe(usb_dev, endpoint->bEndpointAddress); + maxp = usb_maxpacket(usb_dev, pipe, usb_pipeout(pipe)); + + cn_dev = kzalloc(sizeof(*cn_dev), GFP_KERNEL); + if (cn_dev == NULL) + goto err_1; + + cn_dev->input_dev = input_allocate_device(); + if (!cn_dev->input_dev) + goto err_2; + + cn_dev->usb_dev = usb_get_dev(usb_dev); + + cn_dev->data = + usb_alloc_coherent(usb_dev, 8, GFP_ATOMIC, &cn_dev->data_dma); + if (!cn_dev->data) + goto err_3; + + cn_dev->irq = usb_alloc_urb(0, GFP_KERNEL); + if (!cn_dev->irq) + goto err_4; + + usb_set_intfdata(interface, cn_dev); + + usb_make_path(usb_dev, cn_dev->usb_path, sizeof(cn_dev->usb_path)); + strlcat(cn_dev->usb_path, "/input0", sizeof(cn_dev->usb_path)); + + cn_dev->input_dev->name = "CNTouch"; + cn_dev->input_dev->phys = cn_dev->usb_path; + usb_to_input_id(usb_dev, &cn_dev->input_dev->id); + cn_dev->input_dev->dev.parent = &interface->dev; + + cn_dev->input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); + cn_dev->input_dev->keybit[BIT_WORD(BTN_MOUSE)] = + BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); + cn_dev->input_dev->relbit[0] = + BIT_MASK(REL_X) | BIT_MASK(REL_Y) | BIT_MASK(REL_WHEEL); + + input_set_drvdata(cn_dev->input_dev, cn_dev); + + cn_dev->input_dev->open = cntouch_open; + cn_dev->input_dev->close = cntouch_close; + + usb_fill_int_urb(cn_dev->irq, usb_dev, pipe, cn_dev->data, + (maxp > 8 ? 8 : maxp), cntouch_irq, cn_dev, + endpoint->bInterval); + cn_dev->irq->transfer_dma = cn_dev->data_dma; + cn_dev->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + error = input_register_device(cn_dev->input_dev); + if (error) + goto err_5; + + dev_info(&interface->dev, DRIVER_DESC "device now attached\n"); + return 0; + +err_5: + usb_free_urb(cn_dev->irq); +err_4: + usb_free_coherent(usb_dev, 8, cn_dev->data, cn_dev->data_dma); +err_3: + input_free_device(cn_dev->input_dev); +err_2: + usb_set_intfdata(interface, NULL); + usb_put_dev(cn_dev->usb_dev); + kfree(cn_dev); +err_1: + dev_err(&interface->dev, "out of memory\n"); + return error; +} + +static void cntouch_disconnect(struct usb_interface *interface) +{ + struct cntouch_device *cn_dev = usb_get_intfdata(interface); + + usb_kill_urb(cn_dev->irq); + input_unregister_device(cn_dev->input_dev); + usb_free_urb(cn_dev->irq); + usb_free_coherent(cn_dev->usb_dev, 8, cn_dev->data, cn_dev->data_dma); + usb_set_intfdata(interface, NULL); + usb_put_dev(cn_dev->usb_dev); + input_free_device(cn_dev->input_dev); + kfree(cn_dev); + dev_info(&interface->dev, DRIVER_DESC " now disconnected\n"); +} + +static struct usb_driver cntouch_driver = { + .name = "CNTouch", + .probe = &cntouch_probe, + .disconnect = &cntouch_disconnect, + .id_table = cntouch_devices, +}; + +module_usb_driver(cntouch_driver); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
