--- /dev/null
+/*
+ * Hardware event => input event mapping:
+ *
+ *
+ *
+ input.h:#define BTN_TOOL_PEN 0x140 black
+ input.h:#define BTN_TOOL_RUBBER 0x141 blue
+ input.h:#define BTN_TOOL_BRUSH 0x142 green
+ input.h:#define BTN_TOOL_PENCIL 0x143 red
+ input.h:#define BTN_TOOL_AIRBRUSH 0x144 eraser
+ input.h:#define BTN_TOOL_FINGER 0x145 small eraser
+ input.h:#define BTN_TOOL_MOUSE 0x146 mimio interactive
+ input.h:#define BTN_TOOL_LENS 0x147 mimio interactive but1
+ input.h:#define LOCALBTN_TOOL_EXTRA1 0x14a mimio interactive but2 == BTN_TOUCH
+ input.h:#define LOCALBTN_TOOL_EXTRA2 0x14b mimio extra pens (orange, brown, yellow, purple) == BTN_STYLUS
+ input.h:#define LOCALBTN_TOOL_EXTRA3 0x14c unused == BTN_STYLUS2
+ input.h:#define BTN_TOOL_DOUBLETAP 0x14d unused
+ input.h:#define BTN_TOOL_TRIPLETAP 0x14e unused
+ *
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_K) => EV_KEY BIT(BTN_TOOL_PEN)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_B) => EV_KEY BIT(BTN_TOOL_RUBBER)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_G) => EV_KEY BIT(BTN_TOOL_BRUSH)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_R) => EV_KEY BIT(BTN_TOOL_PENCIL)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_E) => EV_KEY BIT(BTN_TOOL_AIRBRUSH)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_ES) => EV_KEY BIT(BTN_TOOL_FINGER)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_I) => EV_KEY BIT(BTN_TOOL_MOUSE)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_IL) => EV_KEY BIT(BTN_TOOL_LENS)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_IR) => EV_KEY BIT(BTN_TOOL_DOUBLETAP)
+ * MIMIO_EV_PENDOWN(MIMIO_PEN_EX) => EV_KEY BIT(BTN_TOOL_TRIPLETAP)
+ * MIMIO_EV_PENDATA => EV_ABS BIT(ABS_X), BIT(ABS_Y)
+ * MIMIO_EV_MEMRESET => EV_KEY BIT(BTN_0)
+ * MIMIO_EV_ACC(ACC_NEWPAGE) => EV_KEY BIT(BTN_1)
+ * MIMIO_EV_ACC(ACC_TAGPAGE) => EV_KEY BIT(BTN_2)
+ * MIMIO_EV_ACC(ACC_PRINTPAGE) => EV_KEY BIT(BTN_3)
+ * MIMIO_EV_ACC(ACC_MAXIMIZE) => EV_KEY BIT(BTN_4)
+ * MIMIO_EV_ACC(ACC_FINDCTLPNL) => EV_KEY BIT(BTN_5)
+ *
+ *
+ * open issues:
+ * - cold-load of data captured when mimio in standalone mode not yet
+ * supported; need to snoop Win32 box to see datastream for this.
+ * - mimio mouse not yet supported; need to snoop Win32 box to see the
+ * datastream for this.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/input.h>
+#include <linux/usb.h>
+
+#define DRIVER_VERSION "v0.031"
+#define DRIVER_AUTHOR "mwilder@cs.nmsu.edu"
+#define DRIVER_DESC "USB mimio-xi driver"
+
+enum {UPVALUE, DOWNVALUE, MOVEVALUE};
+
+#define MIMIO_XRANGE_MAX 9600
+#define MIMIO_YRANGE_MAX 4800
+
+#define LOCALBTN_TOOL_EXTRA1 BTN_TOUCH
+#define LOCALBTN_TOOL_EXTRA2 BTN_STYLUS
+#define LOCALBTN_TOOL_EXTRA3 BTN_STYLUS2
+
+#define MIMIO_VENDOR_ID 0x08d3
+#define MIMIO_PRODUCT_ID 0x0001
+#define MIMIO_MAXPAYLOAD (8)
+#define MIMIO_MAXNAMELEN (64)
+#define MIMIO_TXWAIT (1)
+#define MIMIO_TXDONE (2)
+
+#define MIMIO_EV_PENDOWN (0x22)
+#define MIMIO_EV_PENDATA (0x24)
+#define MIMIO_EV_PENUP (0x51)
+#define MIMIO_EV_MEMRESET (0x45)
+#define MIMIO_EV_ACC (0xb2)
+
+#define MIMIO_PEN_K (1) /* black pen */
+#define MIMIO_PEN_B (2) /* blue pen */
+#define MIMIO_PEN_G (3) /* green pen */
+#define MIMIO_PEN_R (4) /* red pen */
+/* 5, 6, 7, 8 are extra pens */
+#define MIMIO_PEN_E (9) /* big eraser */
+#define MIMIO_PEN_ES (10) /* lil eraser */
+#define MIMIO_PENJUMP_START (10)
+#define MIMIO_PENJUMP (6)
+#define MIMIO_PEN_I (17) /* mimio interactive */
+#define MIMIO_PEN_IL (18) /* mimio interactive button 1 */
+#define MIMIO_PEN_IR (19) /* mimio interactive button 2 */
+
+#define MIMIO_PEN_MAX (MIMIO_PEN_IR)
+
+#define ACC_DONE (0)
+#define ACC_NEWPAGE (1)
+#define ACC_TAGPAGE (2)
+#define ACC_PRINTPAGE (4)
+#define ACC_MAXIMIZE (8)
+#define ACC_FINDCTLPNL (16)
+
+#define isvalidtxsize(n) ((n) > 0 && (n) <= MIMIO_MAXPAYLOAD)
+
+
+struct pktbuf {
+ unsigned char instr;
+ unsigned char buf[16];
+ unsigned char *p;
+ unsigned char *q;
+};
+
+struct usbintendpt {
+ dma_addr_t dma;
+ struct urb *urb;
+ unsigned char *buf;
+ struct usb_endpoint_descriptor *desc;
+};
+
+struct mimio {
+ struct input_dev *idev;
+ struct usb_device *udev;
+ struct usb_interface *uifc;
+ int open;
+ int present;
+ int greeted;
+ int txflags;
+ char phys[MIMIO_MAXNAMELEN];
+ struct usbintendpt in;
+ struct usbintendpt out;
+ struct pktbuf pktbuf;
+ unsigned char minor;
+ wait_queue_head_t waitq;
+ spinlock_t txlock;
+ void (*rxhandler)(struct mimio *, unsigned char *, unsigned int);
+ int last_pen_down;
+};
+
+static void mimio_close(struct input_dev *);
+static void mimio_dealloc(struct mimio *);
+static void mimio_disconnect(struct usb_interface *);
+static int mimio_greet(struct mimio *);
+static void mimio_irq_in(struct urb *);
+static void mimio_irq_out(struct urb *);
+static int mimio_open(struct input_dev *);
+static int mimio_probe(struct usb_interface *, const struct usb_device_id *);
+static void mimio_rx_handler(struct mimio *, unsigned char *, unsigned int);
+static int mimio_tx(struct mimio *, const char *, int);
+
+static char mimio_name[] = "VirtualInk mimio-Xi";
+static struct usb_device_id mimio_table [] = {
+ { USB_DEVICE(MIMIO_VENDOR_ID, MIMIO_PRODUCT_ID) },
+ { USB_DEVICE(0x0525, 0xa4a0) }, /* gadget zero firmware */
+ { }
+};
+
+MODULE_DEVICE_TABLE(usb, mimio_table);
+
+static struct usb_driver mimio_driver = {
+ .name = "mimio",
+ .probe = mimio_probe,
+ .disconnect = mimio_disconnect,
+ .id_table = mimio_table,
+};
+
+static DECLARE_MUTEX(disconnect_sem);
+
+static void mimio_close(struct input_dev *idev)
+{
+ struct mimio *mimio;
+
+ mimio = input_get_drvdata(idev);
+ if (!mimio) {
+ dev_err(&idev->dev, "null mimio attached to input device\n");
+ return;
+ }
+
+ if (mimio->open <= 0)
+ dev_err(&idev->dev, "mimio not open.\n");
+ else
+ mimio->open--;
+
+ if (mimio->present == 0 && mimio->open == 0)
+ mimio_dealloc(mimio);
+}
+
+static void mimio_dealloc(struct mimio *mimio)
+{
+ if (mimio == NULL)
+ return;
+
+ usb_kill_urb(mimio->in.urb);
+
+ usb_kill_urb(mimio->out.urb);
+
+ if (mimio->idev) {
+ input_unregister_device(mimio->idev);
+ if (mimio->idev->grab)
+ input_close_device(mimio->idev->grab);
+ else
+ dev_dbg(&mimio->idev->dev, "mimio->idev->grab == NULL"
+ " -- didn't call input_close_device\n");
+ }
+
+ usb_free_urb(mimio->in.urb);
+
+ usb_free_urb(mimio->out.urb);
+
+ if (mimio->in.buf) {
+ usb_buffer_free(mimio->udev, MIMIO_MAXPAYLOAD, mimio->in.buf,
+ mimio->in.dma);
+ }
+
+ if (mimio->out.buf)
+ usb_buffer_free(mimio->udev, MIMIO_MAXPAYLOAD, mimio->out.buf,
+ mimio->out.dma);
+
+ if (mimio->idev)
+ input_free_device(mimio->idev);
+
+ kfree(mimio);
+}
+
+static void mimio_disconnect(struct usb_interface *ifc)
+{
+ struct mimio *mimio;
+
+ down(&disconnect_sem);
+
+ mimio = usb_get_intfdata(ifc);
+ usb_set_intfdata(ifc, NULL);
+ dev_dbg(&mimio->idev->dev, "disconnect\n");
+
+ if (mimio) {
+ mimio->present = 0;
+
+ if (mimio->open <= 0)
+ mimio_dealloc(mimio);
+ }
+
+ up(&disconnect_sem);
+}
+
+static int mimio_greet(struct mimio *mimio)
+{
+ const struct grtpkt {
+ int nbytes;
+ unsigned delay;
+ char data[8];
+ } grtpkts[] = {
+ { 3, 0, { 0x11, 0x55, 0x44, 0x00, 0x00, 0x00, 0x00, 0x00 } },
+ { 5, 0, { 0x53, 0x55, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00 } },
+ { 5, 0, { 0x43, 0x55, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00 } },
+ { 5, 0, { 0x33, 0x55, 0x00, 0x00, 0x66, 0x00, 0x00, 0x00 } },
+ { 5, 0, { 0x13, 0x00, 0x5e, 0x02, 0x4f, 0x00, 0x00, 0x00 } },
+ { 5, 0, { 0x13, 0x00, 0x04, 0x03, 0x14, 0x00, 0x00, 0x00 } },
+ { 5, 2, { 0x13, 0x00, 0x00, 0x04, 0x17, 0x00, 0x00, 0x00 } },
+ { 5, 0, { 0x13, 0x00, 0x0d, 0x08, 0x16, 0x00, 0x00, 0x00 } },
+ { 5, 0, { 0x13, 0x00, 0x4d, 0x01, 0x5f, 0x00, 0x00, 0x00 } },
+ { 3, 0, { 0xf1, 0x55, 0xa4, 0x00, 0x00, 0x00, 0x00, 0x00 } },
+ { 7, 2, { 0x52, 0x55, 0x00, 0x07, 0x31, 0x55, 0x64, 0x00 } },
+ { 0, 0, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
+ };
+ int rslt;
+ const struct grtpkt *pkt;
+
+ for (pkt = grtpkts; pkt->nbytes; pkt++) {
+ rslt = mimio_tx(mimio, pkt->data, pkt->nbytes);
+ if (rslt)
+ return rslt;
+ if (pkt->delay)
+ msleep(pkt->delay);
+ }
+
+ return 0;
+}
+
+static void mimio_irq_in(struct urb *urb)
+{
+ int rslt;
+ char *data;
+ const char *reason = "going down";
+ struct mimio *mimio;
+
+ mimio = urb->context;
+
+ if (mimio == NULL)
+ /* paranoia */
+ return;
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ETIMEDOUT:
+ reason = "timeout -- unplugged?";
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dev_dbg(&mimio->idev->dev, "%s.\n", reason);
+ return;
+ default:
+ dev_dbg(&mimio->idev->dev, "unknown urb-status: %d.\n",
+ urb->status);
+ goto exit;
+ }
+ data = mimio->in.buf;
+
+ if (mimio->rxhandler)
+ mimio->rxhandler(mimio, data, urb->actual_length);
+exit:
+ /*
+ * Keep listening to device on same urb.
+ */
+ rslt = usb_submit_urb(urb, GFP_ATOMIC);
+ if (rslt)
+ dev_err(&mimio->idev->dev, "usb_submit_urb failure: %d.\n",
+ rslt);
+}
+
+static void mimio_irq_out(struct urb *urb)
+{
+ unsigned long flags;
+ struct mimio *mimio;
+
+ mimio = urb->context;
+
+ if (urb->status)
+ dev_dbg(&mimio->idev->dev, "urb-status: %d.\n", urb->status);
+
+ spin_lock_irqsave(&mimio->txlock, flags);
+ mimio->txflags |= MIMIO_TXDONE;
+ spin_unlock_irqrestore(&mimio->txlock, flags);
+ wmb();
+ wake_up(&mimio->waitq);
+}
+
+static int mimio_open(struct input_dev *idev)
+{
+ int rslt;
+ struct mimio *mimio;
+
+ rslt = 0;
+ down(&disconnect_sem);
+ mimio = input_get_drvdata(idev);
+ dev_dbg(&idev->dev, "mimio_open\n");
+
+ if (mimio == NULL) {
+ dev_err(&idev->dev, "null mimio.\n");
+ rslt = -ENODEV;
+ goto exit;
+ }
+
+ if (mimio->open++)
+ goto exit;
+
+ if (mimio->present && !mimio->greeted) {
+ struct urb *urb = mimio->in.urb;
+ mimio->in.urb->dev = mimio->udev;
+ rslt = usb_submit_urb(mimio->in.urb, GFP_KERNEL);
+ if (rslt) {
+ dev_err(&idev->dev, "usb_submit_urb failure "
+ "(res = %d: %s). Not greeting.\n",
+ rslt,
+ (!urb ? "urb is NULL" :
+ (urb->hcpriv ? "urb->hcpriv is non-NULL" :
+ (!urb->complete ? "urb is not complete" :
+ (urb->number_of_packets <= 0 ? "urb has no packets" :
+ (urb->interval <= 0 ? "urb interval too small" :
+ "urb interval too large or some other error"))))));
+ rslt = -EIO;
+ goto exit;
+ }
+ rslt = mimio_greet(mimio);
+ if (rslt == 0) {
+ dev_dbg(&idev->dev, "Mimio greeted OK.\n");
+ mimio->greeted = 1;
+ } else {
+ dev_dbg(&idev->dev, "Mimio greet Failure (%d)\n",
+ rslt);
+ }
+ }
+
+exit:
+ up(&disconnect_sem);
+ return rslt;
+}
+
+static int mimio_probe(struct usb_interface *ifc,
+ const struct usb_device_id *id)
+{
+ char path[64];
+ int pipe, maxp;
+ struct mimio *mimio;
+ struct usb_device *udev;
+ struct usb_host_interface *hostifc;
+ struct input_dev *input_dev;
+ int res = 0;
+ int i;
+
+ udev = interface_to_usbdev(ifc);
+
+ mimio = kzalloc(sizeof(struct mimio), GFP_KERNEL);
+ if (!mimio)
+ return -ENOMEM;
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ mimio_dealloc(mimio);
+ return -ENOMEM;
+ }
+
+ mimio->uifc = ifc;
+ mimio->udev = udev;
+ mimio->pktbuf.p = mimio->pktbuf.buf;
+ mimio->pktbuf.q = mimio->pktbuf.buf;
+ /* init_input_dev(mimio->idev); */
+ mimio->idev = input_dev;
+ init_waitqueue_head(&mimio->waitq);
+ spin_lock_init(&mimio->txlock);
+ hostifc = ifc->cur_altsetting;
+
+ if (hostifc->desc.bNumEndpoints != 2) {
+ dev_err(&udev->dev, "Unexpected endpoint count: %d.\n",
+ hostifc->desc.bNumEndpoints);
+ mimio_dealloc(mimio);
+ return -ENODEV;
+ }
+
+ mimio->in.desc = &(hostifc->endpoint[0].desc);
+ mimio->out.desc = &(hostifc->endpoint[1].desc);
+
+ mimio->in.buf = usb_buffer_alloc(udev, MIMIO_MAXPAYLOAD, GFP_KERNEL,
+ &mimio->in.dma);
+ mimio->out.buf = usb_buffer_alloc(udev, MIMIO_MAXPAYLOAD, GFP_KERNEL,
+ &mimio->out.dma);
+
+ if (mimio->in.buf == NULL || mimio->out.buf == NULL) {
+ dev_err(&udev->dev, "usb_buffer_alloc failure.\n");
+ mimio_dealloc(mimio);
+ return -ENOMEM;
+ }
+
+ mimio->in.urb = usb_alloc_urb(0, GFP_KERNEL);
+ mimio->out.urb = usb_alloc_urb(0, GFP_KERNEL);
+
+ if (mimio->in.urb == NULL || mimio->out.urb == NULL) {
+ dev_err(&udev->dev, "usb_alloc_urb failure.\n");
+ mimio_dealloc(mimio);
+ return -ENOMEM;
+ }
+
+ /*
+ * Build the input urb.
+ */
+ pipe = usb_rcvintpipe(udev, mimio->in.desc->bEndpointAddress);
+ maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
+ if (maxp > MIMIO_MAXPAYLOAD)
+ maxp = MIMIO_MAXPAYLOAD;
+ usb_fill_int_urb(mimio->in.urb, udev, pipe, mimio->in.buf, maxp,
+ mimio_irq_in, mimio, mimio->in.desc->bInterval);
+ mimio->in.urb->transfer_dma = mimio->in.dma;
+ mimio->in.urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ /*
+ * Build the output urb.
+ */
+ pipe = usb_sndintpipe(udev, mimio->out.desc->bEndpointAddress);
+ maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
+ if (maxp > MIMIO_MAXPAYLOAD)
+ maxp = MIMIO_MAXPAYLOAD;
+ usb_fill_int_urb(mimio->out.urb, udev, pipe, mimio->out.buf, maxp,
+ mimio_irq_out, mimio, mimio->out.desc->bInterval);
+ mimio->out.urb->transfer_dma = mimio->out.dma;
+ mimio->out.urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ /*
+ * Build input device info
+ */
+ usb_make_path(udev, path, 64);
+ snprintf(mimio->phys, MIMIO_MAXNAMELEN, "%s/input0", path);
+ input_set_drvdata(input_dev, mimio);
+ /* input_dev->dev = &ifc->dev; */
+ input_dev->open = mimio_open;
+ input_dev->close = mimio_close;
+ input_dev->name = mimio_name;
+ input_dev->phys = mimio->phys;
+ input_dev->dev.parent = &ifc->dev;
+
+ input_dev->id.bustype = BUS_USB;
+ input_dev->id.vendor = le16_to_cpu(udev->descriptor.idVendor);
+ input_dev->id.product = le16_to_cpu(udev->descriptor.idProduct);
+ input_dev->id.version = le16_to_cpu(udev->descriptor.bcdDevice);
+
+ input_dev->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS);
+ for (i = BTN_TOOL_PEN; i <= LOCALBTN_TOOL_EXTRA2; ++i)
+ set_bit(i, input_dev->keybit);
+
+ input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_0) |
+ BIT_MASK(BTN_1) |
+ BIT_MASK(BTN_2) |
+ BIT_MASK(BTN_3) |
+ BIT_MASK(BTN_4) |
+ BIT_MASK(BTN_5);
+ /* input_dev->keybit[BTN_MOUSE] |= BIT(BTN_LEFT); */
+ input_dev->absbit[0] |= BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
+ input_set_abs_params(input_dev, ABS_X, 0, MIMIO_XRANGE_MAX, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, MIMIO_YRANGE_MAX, 0, 0);
+ input_dev->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
+
+#if 0
+ input_dev->absmin[ABS_X] = 0;
+ input_dev->absmin[ABS_Y] = 0;
+ input_dev->absmax[ABS_X] = 9600;
+ input_dev->absmax[ABS_Y] = 4800;
+ input_dev->absfuzz[ABS_X] = 0;
+ input_dev->absfuzz[ABS_Y] = 0;
+ input_dev->absflat[ABS_X] = 0;
+ input_dev->absflat[ABS_Y] = 0;
+#endif
+
+#if 0
+ /* this will just reduce the precision */
+ input_dev->absfuzz[ABS_X] = 8; /* experimental; may need to change */
+ input_dev->absfuzz[ABS_Y] = 8; /* experimental; may need to change */
+#endif
+
+ /*
+ * Register the input device.
+ */
+ res = input_register_device(mimio->idev);
+ if (res) {
+ dev_err(&udev->dev, "input_register_device failure (%d)\n",
+ res);
+ mimio_dealloc(mimio);
+ return -EIO;
+ }
+ dev_dbg(&mimio->idev->dev, "input: %s on %s (res = %d).\n",
+ input_dev->name, input_dev->phys, res);
+
+ usb_set_intfdata(ifc, mimio);
+ mimio->present = 1;
+
+ /*
+ * Submit the input urb to the usb subsystem.
+ */
+ mimio->in.urb->dev = mimio->udev;
+ res = usb_submit_urb(mimio->in.urb, GFP_KERNEL);
+ if (res) {
+ dev_err(&mimio->idev->dev, "usb_submit_urb failure (%d)\n",
+ res);
+ mimio_dealloc(mimio);
+ return -EIO;
+ }
+
+ /*
+ * Attempt to greet the mimio after giving
+ * it some post-init settling time.
+ *
+ * note: sometimes this sleep interval isn't
+ * long enough to permit the device to re-init
+ * after a hot-swap; maybe need to bump it up.
+ *
+ * As it is, this probably breaks module unloading support!
+ */
+ msleep(1024);
+
+ res = mimio_greet(mimio);
+ if (res == 0) {
+ dev_dbg(&mimio->idev->dev, "Mimio greeted OK.\n");
+ mimio->greeted = 1;
+ mimio->rxhandler = mimio_rx_handler;
+ } else {
+ dev_dbg(&mimio->idev->dev, "Mimio greet Failure (%d)\n", res);
+ }
+
+ return 0;
+}
+
+static int handle_mimio_rx_penupdown(struct mimio *mimio,
+ int down,
+ const char *const instr[],
+ const int instr_ofst[])
+{
+ int penid, x;
+ if (mimio->pktbuf.q - mimio->pktbuf.p < (down ? 4 : 3))
+ return 1; /* partial pkt */
+
+ if (down) {
+ x = *mimio->pktbuf.p ^ *(mimio->pktbuf.p + 1) ^
+ *(mimio->pktbuf.p + 2);
+ if (x != *(mimio->pktbuf.p + 3)) {
+ dev_dbg(&mimio->idev->dev, "EV_PEN%s: bad xsum.\n",
+ down ? "DOWN":"UP");
+ /* skip this event data */
+ mimio->pktbuf.p += 4;
+ /* decode any remaining events */
+ return 0;
+ }
+ penid = mimio->pktbuf.instr = *(mimio->pktbuf.p + 2);
+ if (penid > MIMIO_PEN_MAX) {
+ dev_dbg(&mimio->idev->dev,
+ "Unmapped penID (not in [0, %d]): %d\n",
+ MIMIO_PEN_MAX, (int)mimio->pktbuf.instr);
+ penid = mimio->pktbuf.instr = 0;
+ }
+ mimio->last_pen_down = penid;
+ } else {
+ penid = mimio->last_pen_down;
+ }
+ dev_dbg(&mimio->idev->dev, "%s (id %d, code %d) %s.\n", instr[penid],
+ instr_ofst[penid], penid, down ? "down" : "up");
+
+ if (instr_ofst[penid] >= 0) {
+ int code = BTN_TOOL_PEN + instr_ofst[penid];
+ int value = down ? DOWNVALUE : UPVALUE;
+ if (code > KEY_MAX)
+ dev_dbg(&mimio->idev->dev, "input_event will ignore "
+ "-- code (%d) > KEY_MAX\n", code);
+ if (!test_bit(code, mimio->idev->keybit))
+ dev_dbg(&mimio->idev->dev, "input_event will ignore "
+ "-- bit for code (%d) not enabled\n", code);
+ if (!!test_bit(code, mimio->idev->key) == value)
+ dev_dbg(&mimio->idev->dev, "input_event will ignore "
+ "-- bit for code (%d) already set to %d\n",
+ code, value);
+ if (value != DOWNVALUE) {
+ /* input_regs(mimio->idev, regs); */
+ input_report_key(mimio->idev, code, value);
+ input_sync(mimio->idev);
+ } else {
+ /* wait until we get some coordinates */
+ }
+ } else {
+ dev_dbg(&mimio->idev->dev, "penID offset[%d] == %d is < 0 "
+ "- not sending\n", penid, instr_ofst[penid]);
+ }
+ mimio->pktbuf.p += down ? 4 : 3; /* 3 for up, 4 for down */
+ return 0;
+}
+
+/*
+ * Stay tuned for partial-packet excitement.
+ *
+ * This routine buffers data packets received from the mimio device
+ * in the mimio's data space. This buffering is necessary because
+ * the mimio's in endpoint can serve us partial packets of data, and
+ * we want the driver to support the servicing of multiple mimios.
+ * Empirical evidence gathered so far suggests that the method of
+ * buffering packet data in the mimio's data space works. Previous
+ * versions of this driver did not buffer packet data in each mimio's
+ * data-space, and were therefore not able to service multiple mimios.
+ * Note that since the caller of this routine is running in interrupt
+ * context, care needs to be taken to ensure that this routine does not
+ * become bloated, and it may be that another spinlock is needed in each
+ * mimio to guard the buffered packet data properly.
+ */
+static void mimio_rx_handler(struct mimio *mimio,
+ unsigned char *data,
+ unsigned int nbytes)
+{
+ struct device *dev = &mimio->idev->dev;
+ unsigned int x;
+ unsigned int y;
+ static const char * const instr[] = {
+ "?0",
+ "black pen", "blue pen", "green pen", "red pen",
+ "brown pen", "orange pen", "purple pen", "yellow pen",
+ "big eraser", "lil eraser",
+ "?11", "?12", "?13", "?14", "?15", "?16",
+ "mimio interactive", "interactive button1",
+ "interactive button2"
+ };
+
+ /* Mimio Interactive gives:
+ * down: [0x22 0x01 0x11 0x32 0x24]
+ * b1 : [0x22 0x01 0x12 0x31 0x24]
+ * b2 : [0x22 0x01 0x13 0x30 0x24]
+ */
+ static const int instr_ofst[] = {
+ -1,
+ 0, 1, 2, 3,
+ 9, 9, 9, 9,
+ 4, 5,
+ -1, -1, -1, -1, -1, -1,
+ 6, 7, 8,
+ };
+
+ memcpy(mimio->pktbuf.q, data, nbytes);
+ mimio->pktbuf.q += nbytes;
+
+ while (mimio->pktbuf.p < mimio->pktbuf.q) {
+ int t = *mimio->pktbuf.p;
+ switch (t) {
+ case MIMIO_EV_PENUP:
+ case MIMIO_EV_PENDOWN:
+ if (handle_mimio_rx_penupdown(mimio,
+ t == MIMIO_EV_PENDOWN,
+ instr, instr_ofst))
+ return; /* partial packet */
+ break;
+
+ case MIMIO_EV_PENDATA:
+ if (mimio->pktbuf.q - mimio->pktbuf.p < 6)
+ /* partial pkt */
+ return;
+ x = *mimio->pktbuf.p ^ *(mimio->pktbuf.p + 1) ^
+ *(mimio->pktbuf.p + 2) ^
+ *(mimio->pktbuf.p + 3) ^
+ *(mimio->pktbuf.p + 4);
+ if (x != *(mimio->pktbuf.p + 5)) {
+ dev_dbg(dev, "EV_PENDATA: bad xsum.\n");
+ mimio->pktbuf.p += 6; /* skip this event data */
+ break; /* decode any remaining events */
+ }
+ x = *(mimio->pktbuf.p + 1);
+ x <<= 8;
+ x |= *(mimio->pktbuf.p + 2);
+ y = *(mimio->pktbuf.p + 3);
+ y <<= 8;
+ y |= *(mimio->pktbuf.p + 4);
+ dev_dbg(dev, "coord: (%d, %d)\n", x, y);
+ if (instr_ofst[mimio->pktbuf.instr] >= 0) {
+ int code = BTN_TOOL_PEN +
+ instr_ofst[mimio->last_pen_down];
+#if 0
+ /* Utter hack to ensure we get forwarded _AND_
+ * so we can identify when a complete signal is
+ * received */
+ mimio->idev->abs[ABS_Y] = -1;
+ mimio->idev->abs[ABS_X] = -1;
+#endif
+ /* input_regs(mimio->idev, regs); */
+ input_report_abs(mimio->idev, ABS_X, x);
+ input_report_abs(mimio->idev, ABS_Y, y);
+ /* fake a penup */
+ change_bit(code, mimio->idev->key);
+ input_report_key(mimio->idev,
+ code,
+ DOWNVALUE);
+ /* always sync here */
+ mimio->idev->sync = 0;
+ input_sync(mimio->idev);
+ }
+ mimio->pktbuf.p += 6;
+ break;
+ case MIMIO_EV_MEMRESET:
+ if (mimio->pktbuf.q - mimio->pktbuf.p < 7)
+ /* partial pkt */
+ return;
+ dev_dbg(dev, "mem-reset.\n");
+ /* input_regs(mimio->idev, regs); */
+ input_event(mimio->idev, EV_KEY, BTN_0, 1);
+ input_event(mimio->idev, EV_KEY, BTN_0, 0);
+ input_sync(mimio->idev);
+ mimio->pktbuf.p += 7;
+ break;
+ case MIMIO_EV_ACC:
+ if (mimio->pktbuf.q - mimio->pktbuf.p < 4)
+ /* partial pkt */
+ return;
+ x = *mimio->pktbuf.p ^ *(mimio->pktbuf.p + 1) ^
+ *(mimio->pktbuf.p + 2);
+ if (x != *(mimio->pktbuf.p + 3)) {
+ dev_dbg(dev, "EV_ACC: bad xsum.\n");
+ mimio->pktbuf.p += 4; /* skip this event data */
+ break; /* decode any remaining events */
+ }
+ switch (*(mimio->pktbuf.p + 2)) {
+ case ACC_NEWPAGE:
+ dev_dbg(&mimio->idev->dev, "new-page.\n");
+ /* input_regs(mimio->idev, regs); */
+ input_event(mimio->idev, EV_KEY, BTN_1, 1);
+ input_event(mimio->idev, EV_KEY, BTN_1, 0);
+ input_sync(mimio->idev);
+ break;
+ case ACC_TAGPAGE:
+ dev_dbg(&mimio->idev->dev, "tag-page.\n");
+ /* input_regs(mimio->idev, regs); */
+ input_event(mimio->idev, EV_KEY, BTN_2, 1);
+ input_event(mimio->idev, EV_KEY, BTN_2, 0);
+ input_sync(mimio->idev);
+ break;
+ case ACC_PRINTPAGE:
+ dev_dbg(&mimio->idev->dev, "print-page.\n");
+ /* input_regs(mimio->idev, regs);*/
+ input_event(mimio->idev, EV_KEY, BTN_3, 1);
+ input_event(mimio->idev, EV_KEY, BTN_3, 0);
+ input_sync(mimio->idev);
+ break;
+ case ACC_MAXIMIZE:
+ dev_dbg(&mimio->idev->dev,
+ "maximize-window.\n");
+ /* input_regs(mimio->idev, regs); */
+ input_event(mimio->idev, EV_KEY, BTN_4, 1);
+ input_event(mimio->idev, EV_KEY, BTN_4, 0);
+ input_sync(mimio->idev);
+ break;
+ case ACC_FINDCTLPNL:
+ dev_dbg(&mimio->idev->dev, "find-ctl-panel.\n");
+ /* input_regs(mimio->idev, regs); */
+ input_event(mimio->idev, EV_KEY, BTN_5, 1);
+ input_event(mimio->idev, EV_KEY, BTN_5, 0);
+ input_sync(mimio->idev);
+ break;
+ case ACC_DONE:
+ dev_dbg(&mimio->idev->dev, "acc-done.\n");
+ /* no event is dispatched to the input
+ * subsystem for this device event.
+ */
+ break;
+ default:
+ dev_dbg(dev, "unknown acc event.\n");
+ break;
+ }
+ mimio->pktbuf.p += 4;
+ break;
+ default:
+ mimio->pktbuf.p++;
+ break;
+ }
+ }
+
+ /*
+ * No partial event was received, so reset mimio's pktbuf ptrs.
+ */
+ mimio->pktbuf.p = mimio->pktbuf.q = mimio->pktbuf.buf;
+}
+
+static int mimio_tx(struct mimio *mimio, const char *buf, int nbytes)
+{
+ int rslt;
+ int timeout;
+ unsigned long flags;
+ DECLARE_WAITQUEUE(wait, current);
+
+ if (!(isvalidtxsize(nbytes))) {
+ dev_err(&mimio->idev->dev, "invalid arg: nbytes: %d.\n",
+ nbytes);
+ return -EINVAL;
+ }
+
+ /*
+ * Init the out urb and copy the data to send.
+ */
+ mimio->out.urb->dev = mimio->udev;
+ mimio->out.urb->transfer_buffer_length = nbytes;
+ memcpy(mimio->out.urb->transfer_buffer, buf, nbytes);
+
+ /*
+ * Send the data.
+ */
+ spin_lock_irqsave(&mimio->txlock, flags);
+ mimio->txflags = MIMIO_TXWAIT;
+ rslt = usb_submit_urb(mimio->out.urb, GFP_ATOMIC);
+ spin_unlock_irqrestore(&mimio->txlock, flags);
+ dev_dbg(&mimio->idev->dev, "rslt: %d.\n", rslt);
+
+ if (rslt) {
+ dev_err(&mimio->idev->dev, "usb_submit_urb failure: %d.\n",
+ rslt);
+ return rslt;
+ }
+
+ /*
+ * Wait for completion to be signalled (the mimio_irq_out
+ * completion routine will or MIMIO_TXDONE in with txflags).
+ */
+ timeout = HZ;
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&mimio->waitq, &wait);
+
+ while (timeout && ((mimio->txflags & MIMIO_TXDONE) == 0)) {
+ timeout = schedule_timeout(timeout);
+ rmb();
+ }
+
+ if ((mimio->txflags & MIMIO_TXDONE) == 0)
+ dev_dbg(&mimio->idev->dev, "tx timed out.\n");
+
+ /*
+ * Now that completion has been signalled,
+ * unlink the urb so that it can be recycled.
+ */
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&mimio->waitq, &wait);
+ usb_unlink_urb(mimio->out.urb);
+
+ return rslt;
+}
+
+static int __init mimio_init(void)
+{
+ int rslt;
+
+ rslt = usb_register(&mimio_driver);
+ if (rslt != 0) {
+ err("%s: usb_register failure: %d", __func__, rslt);
+ return rslt;
+ }
+
+ printk(KERN_INFO KBUILD_MODNAME ":"
+ DRIVER_DESC " " DRIVER_VERSION "\n");
+ return rslt;
+}
+
+static void __exit mimio_exit(void)
+{
+ usb_deregister(&mimio_driver);
+}
+
+module_init(mimio_init);
+module_exit(mimio_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff