add initial t248 support

1 files changed, 201 insertions, 0 deletions

diff --git a/hid-tmt248.c b/hid-tmt248.c
new file mode 100644
index 0000000..5a19bb0
--- /dev/null
+++ b/hid-tmt248.c
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/usb.h>
+#include <linux/hid.h>
+#include "hid-tmff2.h"
+
+#define T248_MAX_EFFECTS 16
+#define T248_BUFFER_LENGTH 63
+
+static const u8 setup_0[64] = { 0x42, 0x01 };
+static const u8 setup_1[64] = { 0x0a, 0x04, 0x90, 0x03 };
+static const u8 setup_2[64] = { 0x0a, 0x04, 0x00, 0x0c };
+static const u8 setup_3[64] = { 0x0a, 0x04, 0x12, 0x10 };
+static const u8 setup_4[64] = { 0x0a, 0x04, 0x00, 0x06 };
+static const u8 setup_5[64] = { 0x0a, 0x04, 0x00, 0x0e };
+static const u8 setup_6[64] = { 0x0a, 0x04, 0x00, 0x0e, 0x01 };
+static const u8 *const setup_arr[] = { setup_0, setup_1, setup_2, setup_3, setup_4, setup_5, setup_6 };
+static const unsigned int setup_arr_sizes[] = {
+	ARRAY_SIZE(setup_0),
+	ARRAY_SIZE(setup_1),
+	ARRAY_SIZE(setup_2),
+	ARRAY_SIZE(setup_3),
+	ARRAY_SIZE(setup_4),
+	ARRAY_SIZE(setup_5),
+	ARRAY_SIZE(setup_6)
+};
+
+static const unsigned long t248_params =
+	PARAM_SPRING_LEVEL
+	| PARAM_DAMPER_LEVEL
+	| PARAM_FRICTION_LEVEL
+	| PARAM_RANGE
+	;
+
+static const signed short t248_effects[] = {
+	FF_CONSTANT,
+	FF_RAMP,
+	FF_SPRING,
+	FF_DAMPER,
+	FF_FRICTION,
+	FF_INERTIA,
+	FF_PERIODIC,
+	FF_SINE,
+	FF_TRIANGLE,
+	FF_SQUARE,
+	FF_SAW_UP,
+	FF_SAW_DOWN,
+	FF_AUTOCENTER,
+	FF_GAIN,
+	-1
+};
+
+static int t248_interrupts(struct t300rs_device_entry *t248)
+{
+	u8 *send_buf = kmalloc(256, GFP_KERNEL);
+	struct usb_interface *usbif = to_usb_interface(t248->hdev->dev.parent);
+	struct usb_host_endpoint *ep;
+	int ret, trans, b_ep, i;
+	if (!send_buf) {
+		hid_err(t248->hdev, "failed allocating send buffer\n");
+		return -ENOMEM;
+	}
+
+	ep = &usbif->cur_altsetting->endpoint[1];
+	b_ep = ep->desc.bEndpointAddress;
+
+	for (i = 0; i < ARRAY_SIZE(setup_arr); ++i) {
+		memcpy(send_buf, setup_arr[i], setup_arr_sizes[i]);
+
+		ret = usb_interrupt_msg(t248->usbdev,
+				usb_sndintpipe(t248->usbdev, b_ep),
+				send_buf, setup_arr_sizes[i],
+				&trans,
+				USB_CTRL_SET_TIMEOUT);
+
+		if (ret) {
+			hid_err(t248->hdev, "setup data couldn't be sent\n");
+			goto err;
+		}
+	}
+
+err:
+	kfree(send_buf);
+	return ret;
+}
+
+int t248_wheel_init(struct tmff2_device_entry *tmff2)
+{
+	struct t300rs_device_entry *t248 = kzalloc(sizeof(struct t300rs_device_entry), GFP_KERNEL);
+	struct list_head *report_list;
+	int ret;
+
+	if (!t248) {
+		ret = -ENOMEM;
+		goto t248_err;
+	}
+
+	t248->hdev = tmff2->hdev;
+	t248->input_dev = tmff2->input_dev;
+	t248->usbdev = to_usb_device(tmff2->hdev->dev.parent->parent);
+	t248->buffer_length = T248_BUFFER_LENGTH;
+
+	t248->send_buffer = kzalloc(t248->buffer_length, GFP_KERNEL);
+	if (!t248->send_buffer) {
+		ret = -ENOMEM;
+		goto send_err;
+	}
+
+	report_list = &t248->hdev->report_enum[HID_OUTPUT_REPORT].report_list;
+	t248->report = list_entry(report_list->next, struct hid_report, list);
+	t248->ff_field = t248->report->field[0];
+
+	t248->open = t248->input_dev->open;
+	t248->close = t248->input_dev->close;
+
+	if ((ret = t248_interrupts(t248)))
+		goto interrupt_err;
+
+	/* everything went OK */
+	tmff2->data = t248;
+	tmff2->params = t248_params;
+	tmff2->max_effects = T248_MAX_EFFECTS;
+	memcpy(tmff2->supported_effects, t248_effects, sizeof(t248_effects));
+
+	hid_info(t248->hdev, "force feedback for T248\n");
+	return 0;
+
+interrupt_err:
+send_err:
+	kfree(t248);
+t248_err:
+	hid_err(tmff2->hdev, "failed initializing T248\n");
+	return ret;
+}
+
+int t248_wheel_destroy(void *data)
+{
+	struct t300rs_device_entry *t300rs = data;
+	if (!t300rs)
+		return -ENODEV;
+
+	kfree(t300rs->send_buffer);
+	kfree(t300rs);
+	return 0;
+}
+
+int t248_set_range(void *data, uint16_t value)
+{
+	struct t300rs_device_entry *t248 = data;
+	if (value < 140) {
+		hid_info(t248->hdev, "value %i too small, clamping to 140\n", value);
+		value = 140;
+	}
+
+	if (value > 900) {
+		hid_info(t248->hdev, "value %i too large, clamping to 900\n", value);
+		value = 900;
+	}
+
+	return t300rs_set_range(data, value);
+}
+
+static int t248_open(void *data)
+{
+	struct t300rs_device_entry *t248 = data;
+	if (!t248)
+		return -ENODEV;
+
+	/* TODO: send usb commands to actually open device */
+	return t248->open(t248->input_dev);
+}
+
+static int t248_close(void *data)
+{
+	struct t300rs_device_entry *t248 = data;
+	if (!t248)
+		return -ENODEV;
+
+	/* TODO: send usb commands to actually close device */
+	t248->close(t248->input_dev);
+	return 0;
+}
+
+int t248_populate_api(struct tmff2_device_entry *tmff2)
+{
+	tmff2->play_effect = t300rs_play_effect;
+	tmff2->upload_effect = t300rs_upload_effect;
+	tmff2->update_effect = t300rs_update_effect;
+	tmff2->stop_effect = t300rs_stop_effect;
+
+	tmff2->wheel_init = t248_wheel_init;
+	tmff2->wheel_destroy = t248_wheel_destroy;
+
+	tmff2->open = t248_open;
+	tmff2->close = t248_close;
+	tmff2->set_gain = t300rs_set_gain;
+	/* T248 only has 900 degree range, instead of T300RS 1080 */
+	tmff2->set_range = t248_set_range;
+	tmff2->set_autocenter = t300rs_set_autocenter;
+
+	return 0;
+}