From: Daniel Silverstone <dsilvers@xxxxxxxxxxxx> Zytronic USB-attached capacitive touchscreen support within the generic USB touchscreen driver. Signed-off-by: Daniel Silverstone <dsilvers@xxxxxxxxxxxx> Signed-off-by: Vincent Sanders <vince@xxxxxxxxxxxx> Signed-off-by: Simtec Linux Team <linux@xxxxxxxxxxxx> --- drivers/input/touchscreen/Kconfig | 6 ++ drivers/input/touchscreen/usbtouchscreen.c | 72 +++++++++++++++++++++++++++-- 2 files changed, 75 insertions(+), 3 deletions(-) Index: b/drivers/input/touchscreen/Kconfig =================================================================== --- a/drivers/input/touchscreen/Kconfig 2009-11-23 22:29:31.000000000 +0000 +++ b/drivers/input/touchscreen/Kconfig 2009-11-23 22:29:31.000000000 +0000 @@ -437,6 +437,7 @@ config TOUCHSCREEN_USB_COMPOSITE - IdealTEK URTC1000 - GoTop Super_Q2/GogoPen/PenPower tablets - JASTEC USB Touch Controller/DigiTech DTR-02U + - Zytronic controllers Have a look at <http://linux.chapter7.ch/touchkit/> for a usage description and the required user-space stuff. @@ -509,6 +510,11 @@ config TOUCHSCREEN_USB_E2I bool "e2i Touchscreen controller (e.g. from Mimo 740)" depends on TOUCHSCREEN_USB_COMPOSITE +config TOUCHSCREEN_USB_ZYTRONIC + default y + bool "Zytronic controller" if EMBEDDED + depends on TOUCHSCREEN_USB_COMPOSITE + config TOUCHSCREEN_TOUCHIT213 tristate "Sahara TouchIT-213 touchscreen" select SERIO Index: b/drivers/input/touchscreen/usbtouchscreen.c =================================================================== --- a/drivers/input/touchscreen/usbtouchscreen.c 2009-11-23 22:25:02.000000000 +0000 +++ b/drivers/input/touchscreen/usbtouchscreen.c 2009-11-23 22:29:31.000000000 +0000 @@ -14,6 +14,7 @@ * - General Touch * - GoTop Super_Q2/GogoPen/PenPower tablets * - JASTEC USB touch controller/DigiTech DTR-02U + * - Zytronic capacitive touchscreen * * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@xxxxxx> * Copyright (C) by Todd E. Johnson (mtouchusb.c) @@ -73,6 +74,14 @@ struct usbtouch_device_info { int min_press, max_press; int rept_size; + /* Always service the USB devices irq not just when the input device is + * open. This is useful when devices have a watchdog which prevents us + * from periodically polling the device. Leave this unset unless your + * touchscreen device requires it, as it does consume more of the USB + * bandwidth. + */ + int irq_always; + void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len); /* @@ -121,6 +130,7 @@ enum { DEVTYPE_GOTOP, DEVTYPE_JASTEC, DEVTYPE_E2I, + DEVTYPE_ZYTRONIC, }; #define USB_DEVICE_HID_CLASS(vend, prod) \ @@ -201,6 +211,11 @@ static struct usb_device_id usbtouch_dev #ifdef CONFIG_TOUCHSCREEN_USB_E2I {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I}, #endif + +#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC + {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC}, +#endif + {} }; @@ -621,6 +636,39 @@ static int jastec_read_data(struct usbto } #endif +/***************************************************************************** + * Zytronic Part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC +static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + switch (pkt[0]) { + case 0x3A: /* command response */ + dbg("%s: Command response %d", __func__, pkt[1]); + break; + + case 0xC0: /* down */ + dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); + dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); + dev->touch = 1; + dbg("%s: down %d,%d", __func__, dev->x, dev->y); + return 1; + + case 0x80: /* up */ + dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); + dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); + dev->touch = 0; + dbg("%s: up %d,%d", __func__, dev->x, dev->y); + return 1; + + default: + dbg("%s: Unknown return %d", __func__, pkt[0]); + break; + } + + return 0; +} +#endif /***************************************************************************** * the different device descriptors @@ -783,6 +831,18 @@ static struct usbtouch_device_info usbto .read_data = e2i_read_data, }, #endif + +#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC + [DEVTYPE_ZYTRONIC] = { + .min_xc = 0x0, + .max_xc = 0x03ff, + .min_yc = 0x0, + .max_yc = 0x03ff, + .rept_size = 5, + .read_data = zytronic_read_data, + .irq_always = 1, + }, +#endif }; @@ -933,8 +993,10 @@ static int usbtouch_open(struct input_de usbtouch->irq->dev = usbtouch->udev; - if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) - return -EIO; + if (!usbtouch->type->irq_always) { + if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) + return -EIO; + } return 0; } @@ -943,7 +1005,8 @@ static void usbtouch_close(struct input_ { struct usbtouch_usb *usbtouch = input_get_drvdata(input); - usb_kill_urb(usbtouch->irq); + if (!usbtouch->type->irq_always) + usb_kill_urb(usbtouch->irq); } @@ -1066,6 +1129,9 @@ static int usbtouch_probe(struct usb_int usb_set_intfdata(intf, usbtouch); + if (usbtouch->type->irq_always) + usb_submit_urb(usbtouch->irq, GFP_KERNEL); + return 0; out_free_buffers: -- Ben (ben@xxxxxxxxx, http://www.fluff.org/) 'a smiley only costs 4 bytes' -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
