Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / joystick / iforce / iforce-serio.c

diff --git a/kernel/drivers/input/joystick/iforce/iforce-serio.c b/kernel/drivers/input/joystick/iforce/iforce-serio.c
new file mode 100644 (file)
index 0000000..46d5041
--- /dev/null
+++ b/kernel/drivers/input/joystick/iforce/iforce-serio.c
@@ -0,0 +1,189 @@
+/*
+ *  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.
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include "iforce.h"
+
+void iforce_serial_xmit(struct iforce *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) {
+               clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
+               spin_unlock_irqrestore(&iforce->xmit_lock, flags);
+               return;
+       }
+
+       cs = 0x2b;
+
+       serio_write(iforce->serio, 0x2b);
+
+       serio_write(iforce->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, iforce->xmit.buf[iforce->xmit.tail]);
+               cs ^= iforce->xmit.buf[iforce->xmit.tail];
+               XMIT_INC(iforce->xmit.tail, 1);
+       }
+
+       serio_write(iforce->serio, cs);
+
+       if (test_and_clear_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags))
+               goto again;
+
+       clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
+
+       spin_unlock_irqrestore(&iforce->xmit_lock, flags);
+}
+
+static void iforce_serio_write_wakeup(struct serio *serio)
+{
+       struct iforce *iforce = serio_get_drvdata(serio);
+
+       iforce_serial_xmit(iforce);
+}
+
+static irqreturn_t iforce_serio_irq(struct serio *serio,
+               unsigned char data, unsigned int flags)
+{
+       struct iforce *iforce = serio_get_drvdata(serio);
+
+       if (!iforce->pkt) {
+               if (data == 0x2b)
+                       iforce->pkt = 1;
+               goto out;
+       }
+
+       if (!iforce->id) {
+               if (data > 3 && data != 0xff)
+                       iforce->pkt = 0;
+               else
+                       iforce->id = data;
+               goto out;
+       }
+
+       if (!iforce->len) {
+               if (data > IFORCE_MAX_LENGTH) {
+                       iforce->pkt = 0;
+                       iforce->id = 0;
+               } else {
+                       iforce->len = data;
+               }
+               goto out;
+       }
+
+       if (iforce->idx < iforce->len) {
+               iforce->csum += iforce->data[iforce->idx++] = data;
+               goto out;
+       }
+
+       if (iforce->idx == iforce->len) {
+               iforce_process_packet(iforce, (iforce->id << 8) | iforce->idx, iforce->data);
+               iforce->pkt = 0;
+               iforce->id  = 0;
+               iforce->len = 0;
+               iforce->idx = 0;
+               iforce->csum = 0;
+       }
+out:
+       return IRQ_HANDLED;
+}
+
+static int iforce_serio_connect(struct serio *serio, struct serio_driver *drv)
+{
+       struct iforce *iforce;
+       int err;
+
+       iforce = kzalloc(sizeof(struct iforce), GFP_KERNEL);
+       if (!iforce)
+               return -ENOMEM;
+
+       iforce->bus = IFORCE_232;
+       iforce->serio = serio;
+
+       serio_set_drvdata(serio, iforce);
+
+       err = serio_open(serio, drv);
+       if (err)
+               goto fail1;
+
+       err = iforce_init_device(iforce);
+       if (err)
+               goto fail2;
+
+       return 0;
+
+ fail2:        serio_close(serio);
+ fail1:        serio_set_drvdata(serio, NULL);
+       kfree(iforce);
+       return err;
+}
+
+static void iforce_serio_disconnect(struct serio *serio)
+{
+       struct iforce *iforce = serio_get_drvdata(serio);
+
+       input_unregister_device(iforce->dev);
+       serio_close(serio);
+       serio_set_drvdata(serio, NULL);
+       kfree(iforce);
+}
+
+static 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,
+};