diff options
Diffstat (limited to 'drivers/input/joystick/iforce/iforce-serio.c')
| -rw-r--r-- | drivers/input/joystick/iforce/iforce-serio.c | 193 |
1 files changed, 193 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 000000000000..11f51905cba7 --- /dev/null +++ b/drivers/input/joystick/iforce/iforce-serio.c @@ -0,0 +1,193 @@ +/* + * $Id: iforce-serio.c,v 1.4 2002/01/28 22:45:00 jdeneux Exp $ + * + * Copyright (c) 2000-2001 Vojtech Pavlik <vojtech@ucw.cz> + * Copyright (c) 2001 Johann Deneux <deneux@ifrance.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 pt_regs *regs) +{ + 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, regs); + 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; + + if (!(iforce = kmalloc(sizeof(struct iforce), GFP_KERNEL))) + return -ENOMEM; + + memset(iforce, 0, sizeof(struct iforce)); + + iforce->bus = IFORCE_232; + iforce->serio = serio; + + serio_set_drvdata(serio, iforce); + + err = serio_open(serio, drv); + if (err) { + serio_set_drvdata(serio, NULL); + kfree(iforce); + return err; + } + + if (iforce_init_device(iforce)) { + serio_close(serio); + serio_set_drvdata(serio, NULL); + kfree(iforce); + return -ENODEV; + } + + return 0; +} + +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, +}; |