+/*
+ * The 0x15c2:0xffdc device ID was used for umpteen different imon
+ * devices, and all of them constantly spew interrupts, even when there
+ * is no actual data to report. However, byte 6 of this buffer looks like
+ * its unique across device variants, so we're trying to key off that to
+ * figure out which display type (if any) and what IR protocol the device
+ * actually supports. These devices have their IR protocol hard-coded into
+ * their firmware, they can't be changed on the fly like the newer hardware.
+ */
+static void imon_get_ffdc_type(struct imon_context *ictx)
+{
+ u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
+ u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
+ u64 allowed_protos = IR_TYPE_OTHER;
+
+ switch (ffdc_cfg_byte) {
+ /* iMON Knob, no display, iMON IR + vol knob */
+ case 0x21:
+ dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
+ ictx->display_supported = false;
+ break;
+ /* iMON 2.4G LT (usb stick), no display, iMON RF */
+ case 0x4e:
+ dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
+ ictx->display_supported = false;
+ ictx->rf_device = true;
+ break;
+ /* iMON VFD, no IR (does have vol knob tho) */
+ case 0x35:
+ dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
+ detected_display_type = IMON_DISPLAY_TYPE_VFD;
+ break;
+ /* iMON VFD, iMON IR */
+ case 0x24:
+ case 0x85:
+ dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
+ detected_display_type = IMON_DISPLAY_TYPE_VFD;
+ break;
+ /* iMON VFD, MCE IR */
+ case 0x9e:
+ dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
+ detected_display_type = IMON_DISPLAY_TYPE_VFD;
+ allowed_protos = IR_TYPE_RC6;
+ break;
+ /* iMON LCD, MCE IR */
+ case 0x9f:
+ dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
+ detected_display_type = IMON_DISPLAY_TYPE_LCD;
+ allowed_protos = IR_TYPE_RC6;
+ break;
+ default:
+ dev_info(ictx->dev, "Unknown 0xffdc device, "
+ "defaulting to VFD and iMON IR");
+ detected_display_type = IMON_DISPLAY_TYPE_VFD;
+ break;
+ }
+
+ printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
+
+ ictx->display_type = detected_display_type;
+ ictx->props->allowed_protos = allowed_protos;
+ ictx->ir_type = allowed_protos;
+}
+
+static void imon_set_display_type(struct imon_context *ictx)
+{
+ u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
+
+ /*
+ * Try to auto-detect the type of display if the user hasn't set
+ * it by hand via the display_type modparam. Default is VFD.
+ */
+
+ if (display_type == IMON_DISPLAY_TYPE_AUTO) {
+ switch (ictx->product) {
+ case 0xffdc:
+ /* set in imon_get_ffdc_type() */
+ configured_display_type = ictx->display_type;
+ break;
+ case 0x0034:
+ case 0x0035:
+ configured_display_type = IMON_DISPLAY_TYPE_VGA;
+ break;
+ case 0x0038:
+ case 0x0039:
+ case 0x0045:
+ configured_display_type = IMON_DISPLAY_TYPE_LCD;
+ break;
+ case 0x003c:
+ case 0x0041:
+ case 0x0042:
+ case 0x0043:
+ configured_display_type = IMON_DISPLAY_TYPE_NONE;
+ ictx->display_supported = false;
+ break;
+ case 0x0036:
+ case 0x0044:
+ default:
+ configured_display_type = IMON_DISPLAY_TYPE_VFD;
+ break;
+ }
+ } else {
+ configured_display_type = display_type;
+ if (display_type == IMON_DISPLAY_TYPE_NONE)
+ ictx->display_supported = false;
+ else
+ ictx->display_supported = true;
+ dev_info(ictx->dev, "%s: overriding display type to %d via "
+ "modparam\n", __func__, display_type);
+ }
+
+ ictx->display_type = configured_display_type;
+}
+
+static struct input_dev *imon_init_rdev(struct imon_context *ictx)
+{
+ struct input_dev *rdev;
+ struct ir_dev_props *props;
+ int ret;
+ char *ir_codes = NULL;
+ const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x88 };
+
+ rdev = input_allocate_device();
+ props = kzalloc(sizeof(*props), GFP_KERNEL);
+ if (!rdev || !props) {
+ dev_err(ictx->dev, "remote control dev allocation failed\n");
+ goto out;
+ }
+
+ snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
+ "iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
+ usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
+ sizeof(ictx->phys_rdev));
+ strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
+
+ rdev->name = ictx->name_rdev;
+ rdev->phys = ictx->phys_rdev;
+ usb_to_input_id(ictx->usbdev_intf0, &rdev->id);
+ rdev->dev.parent = ictx->dev;
+ rdev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
+ input_set_drvdata(rdev, ictx);
+
+ props->priv = ictx;
+ props->driver_type = RC_DRIVER_SCANCODE;
+ props->allowed_protos = IR_TYPE_OTHER | IR_TYPE_RC6; /* iMON PAD or MCE */
+ props->change_protocol = imon_ir_change_protocol;
+ ictx->props = props;
+
+ /* Enable front-panel buttons and/or knobs */
+ memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
+ ret = send_packet(ictx);
+ /* Not fatal, but warn about it */
+ if (ret)
+ dev_info(ictx->dev, "panel buttons/knobs setup failed\n");
+
+ if (ictx->product == 0xffdc)
+ imon_get_ffdc_type(ictx);
+
+ imon_set_display_type(ictx);
+
+ if (ictx->ir_type == IR_TYPE_RC6)
+ ir_codes = RC_MAP_IMON_MCE;
+ else
+ ir_codes = RC_MAP_IMON_PAD;
+
+ ret = ir_input_register(rdev, ir_codes, props, MOD_NAME);
+ if (ret < 0) {
+ dev_err(ictx->dev, "remote input dev register failed\n");
+ goto out;
+ }
+
+ return rdev;
+
+out:
+ kfree(props);
+ input_free_device(rdev);
+ return NULL;
+}
+