kernel-ark/drivers/parport/parport_gsc.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

438 lines
11 KiB
C

/*
* Low-level parallel-support for PC-style hardware integrated in the
* LASI-Controller (on GSC-Bus) for HP-PARISC Workstations
*
* 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.
*
* (C) 1999-2001 by Helge Deller <deller@gmx.de>
*
*
* based on parport_pc.c by
* Grant Guenther <grant@torque.net>
* Phil Blundell <philb@gnu.org>
* Tim Waugh <tim@cyberelk.demon.co.uk>
* Jose Renau <renau@acm.org>
* David Campbell
* Andrea Arcangeli
*/
#undef DEBUG /* undef for production */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/sysctl.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
#include <asm/superio.h>
#include <linux/parport.h>
#include <asm/pdc.h>
#include <asm/parisc-device.h>
#include <asm/hardware.h>
#include "parport_gsc.h"
MODULE_AUTHOR("Helge Deller <deller@gmx.de>");
MODULE_DESCRIPTION("HP-PARISC PC-style parallel port driver");
MODULE_SUPPORTED_DEVICE("integrated PC-style parallel port");
MODULE_LICENSE("GPL");
/*
* Clear TIMEOUT BIT in EPP MODE
*
* This is also used in SPP detection.
*/
static int clear_epp_timeout(struct parport *pb)
{
unsigned char r;
if (!(parport_gsc_read_status(pb) & 0x01))
return 1;
/* To clear timeout some chips require double read */
parport_gsc_read_status(pb);
r = parport_gsc_read_status(pb);
parport_writeb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */
parport_writeb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */
r = parport_gsc_read_status(pb);
return !(r & 0x01);
}
/*
* Access functions.
*
* Most of these aren't static because they may be used by the
* parport_xxx_yyy macros. extern __inline__ versions of several
* of these are in parport_gsc.h.
*/
static irqreturn_t parport_gsc_interrupt(int irq, void *dev_id)
{
parport_generic_irq(irq, (struct parport *) dev_id);
return IRQ_HANDLED;
}
void parport_gsc_init_state(struct pardevice *dev, struct parport_state *s)
{
s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
}
void parport_gsc_save_state(struct parport *p, struct parport_state *s)
{
s->u.pc.ctr = parport_readb (CONTROL (p));
}
void parport_gsc_restore_state(struct parport *p, struct parport_state *s)
{
parport_writeb (s->u.pc.ctr, CONTROL (p));
}
struct parport_operations parport_gsc_ops =
{
.write_data = parport_gsc_write_data,
.read_data = parport_gsc_read_data,
.write_control = parport_gsc_write_control,
.read_control = parport_gsc_read_control,
.frob_control = parport_gsc_frob_control,
.read_status = parport_gsc_read_status,
.enable_irq = parport_gsc_enable_irq,
.disable_irq = parport_gsc_disable_irq,
.data_forward = parport_gsc_data_forward,
.data_reverse = parport_gsc_data_reverse,
.init_state = parport_gsc_init_state,
.save_state = parport_gsc_save_state,
.restore_state = parport_gsc_restore_state,
.epp_write_data = parport_ieee1284_epp_write_data,
.epp_read_data = parport_ieee1284_epp_read_data,
.epp_write_addr = parport_ieee1284_epp_write_addr,
.epp_read_addr = parport_ieee1284_epp_read_addr,
.ecp_write_data = parport_ieee1284_ecp_write_data,
.ecp_read_data = parport_ieee1284_ecp_read_data,
.ecp_write_addr = parport_ieee1284_ecp_write_addr,
.compat_write_data = parport_ieee1284_write_compat,
.nibble_read_data = parport_ieee1284_read_nibble,
.byte_read_data = parport_ieee1284_read_byte,
.owner = THIS_MODULE,
};
/* --- Mode detection ------------------------------------- */
/*
* Checks for port existence, all ports support SPP MODE
*/
static int __devinit parport_SPP_supported(struct parport *pb)
{
unsigned char r, w;
/*
* first clear an eventually pending EPP timeout
* I (sailer@ife.ee.ethz.ch) have an SMSC chipset
* that does not even respond to SPP cycles if an EPP
* timeout is pending
*/
clear_epp_timeout(pb);
/* Do a simple read-write test to make sure the port exists. */
w = 0xc;
parport_writeb (w, CONTROL (pb));
/* Is there a control register that we can read from? Some
* ports don't allow reads, so read_control just returns a
* software copy. Some ports _do_ allow reads, so bypass the
* software copy here. In addition, some bits aren't
* writable. */
r = parport_readb (CONTROL (pb));
if ((r & 0xf) == w) {
w = 0xe;
parport_writeb (w, CONTROL (pb));
r = parport_readb (CONTROL (pb));
parport_writeb (0xc, CONTROL (pb));
if ((r & 0xf) == w)
return PARPORT_MODE_PCSPP;
}
/* Try the data register. The data lines aren't tri-stated at
* this stage, so we expect back what we wrote. */
w = 0xaa;
parport_gsc_write_data (pb, w);
r = parport_gsc_read_data (pb);
if (r == w) {
w = 0x55;
parport_gsc_write_data (pb, w);
r = parport_gsc_read_data (pb);
if (r == w)
return PARPORT_MODE_PCSPP;
}
return 0;
}
/* Detect PS/2 support.
*
* Bit 5 (0x20) sets the PS/2 data direction; setting this high
* allows us to read data from the data lines. In theory we would get back
* 0xff but any peripheral attached to the port may drag some or all of the
* lines down to zero. So if we get back anything that isn't the contents
* of the data register we deem PS/2 support to be present.
*
* Some SPP ports have "half PS/2" ability - you can't turn off the line
* drivers, but an external peripheral with sufficiently beefy drivers of
* its own can overpower them and assert its own levels onto the bus, from
* where they can then be read back as normal. Ports with this property
* and the right type of device attached are likely to fail the SPP test,
* (as they will appear to have stuck bits) and so the fact that they might
* be misdetected here is rather academic.
*/
static int __devinit parport_PS2_supported(struct parport *pb)
{
int ok = 0;
clear_epp_timeout(pb);
/* try to tri-state the buffer */
parport_gsc_data_reverse (pb);
parport_gsc_write_data(pb, 0x55);
if (parport_gsc_read_data(pb) != 0x55) ok++;
parport_gsc_write_data(pb, 0xaa);
if (parport_gsc_read_data(pb) != 0xaa) ok++;
/* cancel input mode */
parport_gsc_data_forward (pb);
if (ok) {
pb->modes |= PARPORT_MODE_TRISTATE;
} else {
struct parport_gsc_private *priv = pb->private_data;
priv->ctr_writable &= ~0x20;
}
return ok;
}
/* --- Initialisation code -------------------------------- */
struct parport *__devinit parport_gsc_probe_port (unsigned long base,
unsigned long base_hi,
int irq, int dma,
struct pci_dev *dev)
{
struct parport_gsc_private *priv;
struct parport_operations *ops;
struct parport tmp;
struct parport *p = &tmp;
priv = kzalloc (sizeof (struct parport_gsc_private), GFP_KERNEL);
if (!priv) {
printk (KERN_DEBUG "parport (0x%lx): no memory!\n", base);
return NULL;
}
ops = kmalloc (sizeof (struct parport_operations), GFP_KERNEL);
if (!ops) {
printk (KERN_DEBUG "parport (0x%lx): no memory for ops!\n",
base);
kfree (priv);
return NULL;
}
memcpy (ops, &parport_gsc_ops, sizeof (struct parport_operations));
priv->ctr = 0xc;
priv->ctr_writable = 0xff;
priv->dma_buf = 0;
priv->dma_handle = 0;
priv->dev = dev;
p->base = base;
p->base_hi = base_hi;
p->irq = irq;
p->dma = dma;
p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
p->ops = ops;
p->private_data = priv;
p->physport = p;
if (!parport_SPP_supported (p)) {
/* No port. */
kfree (priv);
return NULL;
}
parport_PS2_supported (p);
if (!(p = parport_register_port(base, PARPORT_IRQ_NONE,
PARPORT_DMA_NONE, ops))) {
kfree (priv);
kfree (ops);
return NULL;
}
p->base_hi = base_hi;
p->modes = tmp.modes;
p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
p->private_data = priv;
printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
p->irq = irq;
if (p->irq == PARPORT_IRQ_AUTO) {
p->irq = PARPORT_IRQ_NONE;
}
if (p->irq != PARPORT_IRQ_NONE) {
printk(", irq %d", p->irq);
if (p->dma == PARPORT_DMA_AUTO) {
p->dma = PARPORT_DMA_NONE;
}
}
if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
is mandatory (see above) */
p->dma = PARPORT_DMA_NONE;
printk(" [");
#define printmode(x) {if(p->modes&PARPORT_MODE_##x){printk("%s%s",f?",":"",#x);f++;}}
{
int f = 0;
printmode(PCSPP);
printmode(TRISTATE);
printmode(COMPAT)
printmode(EPP);
// printmode(ECP);
// printmode(DMA);
}
#undef printmode
printk("]\n");
if (p->irq != PARPORT_IRQ_NONE) {
if (request_irq (p->irq, parport_gsc_interrupt,
0, p->name, p)) {
printk (KERN_WARNING "%s: irq %d in use, "
"resorting to polled operation\n",
p->name, p->irq);
p->irq = PARPORT_IRQ_NONE;
p->dma = PARPORT_DMA_NONE;
}
}
/* Done probing. Now put the port into a sensible start-up state. */
parport_gsc_write_data(p, 0);
parport_gsc_data_forward (p);
/* Now that we've told the sharing engine about the port, and
found out its characteristics, let the high-level drivers
know about it. */
parport_announce_port (p);
return p;
}
#define PARPORT_GSC_OFFSET 0x800
static int __initdata parport_count;
static int __devinit parport_init_chip(struct parisc_device *dev)
{
struct parport *p;
unsigned long port;
if (!dev->irq) {
printk(KERN_WARNING "IRQ not found for parallel device at 0x%lx\n",
dev->hpa.start);
return -ENODEV;
}
port = dev->hpa.start + PARPORT_GSC_OFFSET;
/* some older machines with ASP-chip don't support
* the enhanced parport modes.
*/
if (boot_cpu_data.cpu_type > pcxt && !pdc_add_valid(port+4)) {
/* Initialize bidirectional-mode (0x10) & data-tranfer-mode #1 (0x20) */
printk("%s: initialize bidirectional-mode.\n", __FUNCTION__);
parport_writeb ( (0x10 + 0x20), port + 4);
} else {
printk("%s: enhanced parport-modes not supported.\n", __FUNCTION__);
}
p = parport_gsc_probe_port(port, 0, dev->irq,
/* PARPORT_IRQ_NONE */ PARPORT_DMA_NONE, NULL);
if (p)
parport_count++;
dev->dev.driver_data = p;
return 0;
}
static int __devexit parport_remove_chip(struct parisc_device *dev)
{
struct parport *p = dev->dev.driver_data;
if (p) {
struct parport_gsc_private *priv = p->private_data;
struct parport_operations *ops = p->ops;
parport_remove_port(p);
if (p->dma != PARPORT_DMA_NONE)
free_dma(p->dma);
if (p->irq != PARPORT_IRQ_NONE)
free_irq(p->irq, p);
if (priv->dma_buf)
pci_free_consistent(priv->dev, PAGE_SIZE,
priv->dma_buf,
priv->dma_handle);
kfree (p->private_data);
parport_put_port(p);
kfree (ops); /* hope no-one cached it */
}
return 0;
}
static struct parisc_device_id parport_tbl[] = {
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x74 },
{ 0, }
};
MODULE_DEVICE_TABLE(parisc, parport_tbl);
static struct parisc_driver parport_driver = {
.name = "Parallel",
.id_table = parport_tbl,
.probe = parport_init_chip,
.remove = __devexit_p(parport_remove_chip),
};
int __devinit parport_gsc_init(void)
{
return register_parisc_driver(&parport_driver);
}
static void __devexit parport_gsc_exit(void)
{
unregister_parisc_driver(&parport_driver);
}
module_init(parport_gsc_init);
module_exit(parport_gsc_exit);