Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 257 insertions, 0 deletions

diff --git a/drivers/input/joystick/iforce/iforce-serio.c b/drivers/input/joystick/iforce/iforce-serio.c
new file mode 100644
index 000000000..2380546d7
--- /dev/null
+++ b/drivers/input/joystick/iforce/iforce-serio.c
@@ -0,0 +1,257 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2000-2001 Vojtech Pavlik <vojtech@ucw.cz>
+ *  Copyright (c) 2001, 2007 Johann Deneux <johann.deneux@gmail.com>
+ *
+ *  USB/RS232 I-Force joysticks and wheels.
+ */
+
+#include <linux/serio.h>
+#include "iforce.h"
+
+struct iforce_serio {
+	struct iforce iforce;
+
+	struct serio *serio;
+	int idx, pkt, len, id;
+	u8 csum;
+	u8 expect_packet;
+	u8 cmd_response[IFORCE_MAX_LENGTH];
+	u8 cmd_response_len;
+	u8 data_in[IFORCE_MAX_LENGTH];
+};
+
+static void iforce_serio_xmit(struct iforce *iforce)
+{
+	struct iforce_serio *iforce_serio = container_of(iforce,
+							 struct iforce_serio,
+							 iforce);
+	unsigned char cs;
+	int i;
+	unsigned long flags;
+
+	if (test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
+		set_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags);
+		return;
+	}
+
+	spin_lock_irqsave(&iforce->xmit_lock, flags);
+
+again:
+	if (iforce->xmit.head == iforce->xmit.tail) {
+		iforce_clear_xmit_and_wake(iforce);
+		spin_unlock_irqrestore(&iforce->xmit_lock, flags);
+		return;
+	}
+
+	cs = 0x2b;
+
+	serio_write(iforce_serio->serio, 0x2b);
+
+	serio_write(iforce_serio->serio, iforce->xmit.buf[iforce->xmit.tail]);
+	cs ^= iforce->xmit.buf[iforce->xmit.tail];
+	XMIT_INC(iforce->xmit.tail, 1);
+
+	for (i=iforce->xmit.buf[iforce->xmit.tail]; i >= 0; --i) {
+		serio_write(iforce_serio->serio,
+			    iforce->xmit.buf[iforce->xmit.tail]);
+		cs ^= iforce->xmit.buf[iforce->xmit.tail];
+		XMIT_INC(iforce->xmit.tail, 1);
+	}
+
+	serio_write(iforce_serio->serio, cs);
+
+	if (test_and_clear_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags))
+		goto again;
+
+	iforce_clear_xmit_and_wake(iforce);
+
+	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
+}
+
+static int iforce_serio_get_id(struct iforce *iforce, u8 id,
+			       u8 *response_data, size_t *response_len)
+{
+	struct iforce_serio *iforce_serio = container_of(iforce,
+							 struct iforce_serio,
+							 iforce);
+
+	iforce_serio->expect_packet = HI(FF_CMD_QUERY);
+	iforce_serio->cmd_response_len = 0;
+
+	iforce_send_packet(iforce, FF_CMD_QUERY, &id);
+
+	wait_event_interruptible_timeout(iforce->wait,
+					 !iforce_serio->expect_packet, HZ);
+
+	if (iforce_serio->expect_packet) {
+		iforce_serio->expect_packet = 0;
+		return -ETIMEDOUT;
+	}
+
+	if (iforce_serio->cmd_response[0] != id)
+		return -EIO;
+
+	memcpy(response_data, iforce_serio->cmd_response,
+	       iforce_serio->cmd_response_len);
+	*response_len = iforce_serio->cmd_response_len;
+
+	return 0;
+}
+
+static int iforce_serio_start_io(struct iforce *iforce)
+{
+	/* No special handling required */
+	return 0;
+}
+
+static void iforce_serio_stop_io(struct iforce *iforce)
+{
+	//TODO: Wait for the last packets to be sent
+}
+
+static const struct iforce_xport_ops iforce_serio_xport_ops = {
+	.xmit		= iforce_serio_xmit,
+	.get_id		= iforce_serio_get_id,
+	.start_io	= iforce_serio_start_io,
+	.stop_io	= iforce_serio_stop_io,
+};
+
+static void iforce_serio_write_wakeup(struct serio *serio)
+{
+	struct iforce *iforce = serio_get_drvdata(serio);
+
+	iforce_serio_xmit(iforce);
+}
+
+static irqreturn_t iforce_serio_irq(struct serio *serio,
+				    unsigned char data, unsigned int flags)
+{
+	struct iforce_serio *iforce_serio = serio_get_drvdata(serio);
+	struct iforce *iforce = &iforce_serio->iforce;
+
+	if (!iforce_serio->pkt) {
+		if (data == 0x2b)
+			iforce_serio->pkt = 1;
+		goto out;
+	}
+
+	if (!iforce_serio->id) {
+		if (data > 3 && data != 0xff)
+			iforce_serio->pkt = 0;
+		else
+			iforce_serio->id = data;
+		goto out;
+	}
+
+	if (!iforce_serio->len) {
+		if (data > IFORCE_MAX_LENGTH) {
+			iforce_serio->pkt = 0;
+			iforce_serio->id = 0;
+		} else {
+			iforce_serio->len = data;
+		}
+		goto out;
+	}
+
+	if (iforce_serio->idx < iforce_serio->len) {
+		iforce_serio->data_in[iforce_serio->idx++] = data;
+		iforce_serio->csum += data;
+		goto out;
+	}
+
+	if (iforce_serio->idx == iforce_serio->len) {
+		/* Handle command completion */
+		if (iforce_serio->expect_packet == iforce_serio->id) {
+			iforce_serio->expect_packet = 0;
+			memcpy(iforce_serio->cmd_response,
+			       iforce_serio->data_in, IFORCE_MAX_LENGTH);
+			iforce_serio->cmd_response_len = iforce_serio->len;
+
+			/* Signal that command is done */
+			wake_up_all(&iforce->wait);
+		} else if (likely(iforce->type)) {
+			iforce_process_packet(iforce, iforce_serio->id,
+					      iforce_serio->data_in,
+					      iforce_serio->len);
+		}
+
+		iforce_serio->pkt = 0;
+		iforce_serio->id  = 0;
+		iforce_serio->len = 0;
+		iforce_serio->idx = 0;
+		iforce_serio->csum = 0;
+	}
+out:
+	return IRQ_HANDLED;
+}
+
+static int iforce_serio_connect(struct serio *serio, struct serio_driver *drv)
+{
+	struct iforce_serio *iforce_serio;
+	int err;
+
+	iforce_serio = kzalloc(sizeof(*iforce_serio), GFP_KERNEL);
+	if (!iforce_serio)
+		return -ENOMEM;
+
+	iforce_serio->iforce.xport_ops = &iforce_serio_xport_ops;
+
+	iforce_serio->serio = serio;
+	serio_set_drvdata(serio, iforce_serio);
+
+	err = serio_open(serio, drv);
+	if (err)
+		goto fail1;
+
+	err = iforce_init_device(&serio->dev, BUS_RS232, &iforce_serio->iforce);
+	if (err)
+		goto fail2;
+
+	return 0;
+
+ fail2:	serio_close(serio);
+ fail1:	serio_set_drvdata(serio, NULL);
+	kfree(iforce_serio);
+	return err;
+}
+
+static void iforce_serio_disconnect(struct serio *serio)
+{
+	struct iforce_serio *iforce_serio = serio_get_drvdata(serio);
+
+	input_unregister_device(iforce_serio->iforce.dev);
+	serio_close(serio);
+	serio_set_drvdata(serio, NULL);
+	kfree(iforce_serio);
+}
+
+static const struct serio_device_id iforce_serio_ids[] = {
+	{
+		.type	= SERIO_RS232,
+		.proto	= SERIO_IFORCE,
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, iforce_serio_ids);
+
+struct serio_driver iforce_serio_drv = {
+	.driver		= {
+		.name	= "iforce",
+	},
+	.description	= "RS232 I-Force joysticks and wheels driver",
+	.id_table	= iforce_serio_ids,
+	.write_wakeup	= iforce_serio_write_wakeup,
+	.interrupt	= iforce_serio_irq,
+	.connect	= iforce_serio_connect,
+	.disconnect	= iforce_serio_disconnect,
+};
+
+module_serio_driver(iforce_serio_drv);
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
+MODULE_DESCRIPTION("RS232 I-Force joysticks and wheels driver");
+MODULE_LICENSE("GPL");