linux/drivers/input/serio/rpckbd.c
Linus Torvalds 0195c00244 Disintegrate and delete asm/system.h
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Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system

Pull "Disintegrate and delete asm/system.h" from David Howells:
 "Here are a bunch of patches to disintegrate asm/system.h into a set of
  separate bits to relieve the problem of circular inclusion
  dependencies.

  I've built all the working defconfigs from all the arches that I can
  and made sure that they don't break.

  The reason for these patches is that I recently encountered a circular
  dependency problem that came about when I produced some patches to
  optimise get_order() by rewriting it to use ilog2().

  This uses bitops - and on the SH arch asm/bitops.h drags in
  asm-generic/get_order.h by a circuituous route involving asm/system.h.

  The main difficulty seems to be asm/system.h.  It holds a number of
  low level bits with no/few dependencies that are commonly used (eg.
  memory barriers) and a number of bits with more dependencies that
  aren't used in many places (eg.  switch_to()).

  These patches break asm/system.h up into the following core pieces:

    (1) asm/barrier.h

        Move memory barriers here.  This already done for MIPS and Alpha.

    (2) asm/switch_to.h

        Move switch_to() and related stuff here.

    (3) asm/exec.h

        Move arch_align_stack() here.  Other process execution related bits
        could perhaps go here from asm/processor.h.

    (4) asm/cmpxchg.h

        Move xchg() and cmpxchg() here as they're full word atomic ops and
        frequently used by atomic_xchg() and atomic_cmpxchg().

    (5) asm/bug.h

        Move die() and related bits.

    (6) asm/auxvec.h

        Move AT_VECTOR_SIZE_ARCH here.

  Other arch headers are created as needed on a per-arch basis."

Fixed up some conflicts from other header file cleanups and moving code
around that has happened in the meantime, so David's testing is somewhat
weakened by that.  We'll find out anything that got broken and fix it..

* tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)
  Delete all instances of asm/system.h
  Remove all #inclusions of asm/system.h
  Add #includes needed to permit the removal of asm/system.h
  Move all declarations of free_initmem() to linux/mm.h
  Disintegrate asm/system.h for OpenRISC
  Split arch_align_stack() out from asm-generic/system.h
  Split the switch_to() wrapper out of asm-generic/system.h
  Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
  Create asm-generic/barrier.h
  Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
  Disintegrate asm/system.h for Xtensa
  Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]
  Disintegrate asm/system.h for Tile
  Disintegrate asm/system.h for Sparc
  Disintegrate asm/system.h for SH
  Disintegrate asm/system.h for Score
  Disintegrate asm/system.h for S390
  Disintegrate asm/system.h for PowerPC
  Disintegrate asm/system.h for PA-RISC
  Disintegrate asm/system.h for MN10300
  ...
2012-03-28 15:58:21 -07:00

175 lines
4.3 KiB
C

/*
* Copyright (c) 2000-2001 Vojtech Pavlik
* Copyright (c) 2002 Russell King
*/
/*
* Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
*/
/*
* 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 <linux/module.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/serio.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <mach/hardware.h>
#include <asm/hardware/iomd.h>
MODULE_AUTHOR("Vojtech Pavlik, Russell King");
MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:kart");
struct rpckbd_data {
int tx_irq;
int rx_irq;
};
static int rpckbd_write(struct serio *port, unsigned char val)
{
while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
cpu_relax();
iomd_writeb(val, IOMD_KARTTX);
return 0;
}
static irqreturn_t rpckbd_rx(int irq, void *dev_id)
{
struct serio *port = dev_id;
unsigned int byte;
int handled = IRQ_NONE;
while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
byte = iomd_readb(IOMD_KARTRX);
serio_interrupt(port, byte, 0);
handled = IRQ_HANDLED;
}
return handled;
}
static irqreturn_t rpckbd_tx(int irq, void *dev_id)
{
return IRQ_HANDLED;
}
static int rpckbd_open(struct serio *port)
{
struct rpckbd_data *rpckbd = port->port_data;
/* Reset the keyboard state machine. */
iomd_writeb(0, IOMD_KCTRL);
iomd_writeb(8, IOMD_KCTRL);
iomd_readb(IOMD_KARTRX);
if (request_irq(rpckbd->rx_irq, rpckbd_rx, 0, "rpckbd", port) != 0) {
printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
return -EBUSY;
}
if (request_irq(rpckbd->tx_irq, rpckbd_tx, 0, "rpckbd", port) != 0) {
printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
free_irq(rpckbd->rx_irq, port);
return -EBUSY;
}
return 0;
}
static void rpckbd_close(struct serio *port)
{
struct rpckbd_data *rpckbd = port->port_data;
free_irq(rpckbd->rx_irq, port);
free_irq(rpckbd->tx_irq, port);
}
/*
* Allocate and initialize serio structure for subsequent registration
* with serio core.
*/
static int __devinit rpckbd_probe(struct platform_device *dev)
{
struct rpckbd_data *rpckbd;
struct serio *serio;
int tx_irq, rx_irq;
rx_irq = platform_get_irq(dev, 0);
if (rx_irq <= 0)
return rx_irq < 0 ? rx_irq : -ENXIO;
tx_irq = platform_get_irq(dev, 1);
if (tx_irq <= 0)
return tx_irq < 0 ? tx_irq : -ENXIO;
serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
rpckbd = kzalloc(sizeof(*rpckbd), GFP_KERNEL);
if (!serio || !rpckbd) {
kfree(rpckbd);
kfree(serio);
return -ENOMEM;
}
rpckbd->rx_irq = rx_irq;
rpckbd->tx_irq = tx_irq;
serio->id.type = SERIO_8042;
serio->write = rpckbd_write;
serio->open = rpckbd_open;
serio->close = rpckbd_close;
serio->dev.parent = &dev->dev;
serio->port_data = rpckbd;
strlcpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
strlcpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
platform_set_drvdata(dev, serio);
serio_register_port(serio);
return 0;
}
static int __devexit rpckbd_remove(struct platform_device *dev)
{
struct serio *serio = platform_get_drvdata(dev);
struct rpckbd_data *rpckbd = serio->port_data;
serio_unregister_port(serio);
kfree(rpckbd);
return 0;
}
static struct platform_driver rpckbd_driver = {
.probe = rpckbd_probe,
.remove = __devexit_p(rpckbd_remove),
.driver = {
.name = "kart",
.owner = THIS_MODULE,
},
};
module_platform_driver(rpckbd_driver);