222 lines
6.1 KiB
C
222 lines
6.1 KiB
C
/*
|
|
* Low-level parallel-support for PC-style hardware integrated in the
|
|
* LASI-Controller (on GSC-Bus) for HP-PARISC Workstations
|
|
*
|
|
* (C) 1999-2001 by Helge Deller <deller@gmx.de>
|
|
*
|
|
*
|
|
* 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
|
|
*
|
|
* based on parport_pc.c by
|
|
* Grant Guenther <grant@torque.net>
|
|
* Phil Blundell <Philip.Blundell@pobox.com>
|
|
* Tim Waugh <tim@cyberelk.demon.co.uk>
|
|
* Jose Renau <renau@acm.org>
|
|
* David Campbell
|
|
* Andrea Arcangeli
|
|
*/
|
|
|
|
#ifndef __DRIVERS_PARPORT_PARPORT_GSC_H
|
|
#define __DRIVERS_PARPORT_PARPORT_GSC_H
|
|
|
|
#include <asm/io.h>
|
|
#include <linux/delay.h>
|
|
|
|
#undef DEBUG_PARPORT /* undefine for production */
|
|
#define DELAY_TIME 0
|
|
|
|
#if DELAY_TIME == 0
|
|
#define parport_readb gsc_readb
|
|
#define parport_writeb gsc_writeb
|
|
#else
|
|
static __inline__ unsigned char parport_readb( unsigned long port )
|
|
{
|
|
udelay(DELAY_TIME);
|
|
return gsc_readb(port);
|
|
}
|
|
|
|
static __inline__ void parport_writeb( unsigned char value, unsigned long port )
|
|
{
|
|
gsc_writeb(value,port);
|
|
udelay(DELAY_TIME);
|
|
}
|
|
#endif
|
|
|
|
/* --- register definitions ------------------------------- */
|
|
|
|
#define EPPDATA(p) ((p)->base + 0x4)
|
|
#define EPPADDR(p) ((p)->base + 0x3)
|
|
#define CONTROL(p) ((p)->base + 0x2)
|
|
#define STATUS(p) ((p)->base + 0x1)
|
|
#define DATA(p) ((p)->base + 0x0)
|
|
|
|
struct parport_gsc_private {
|
|
/* Contents of CTR. */
|
|
unsigned char ctr;
|
|
|
|
/* Bitmask of writable CTR bits. */
|
|
unsigned char ctr_writable;
|
|
|
|
/* Number of bytes per portword. */
|
|
int pword;
|
|
|
|
/* Not used yet. */
|
|
int readIntrThreshold;
|
|
int writeIntrThreshold;
|
|
|
|
/* buffer suitable for DMA, if DMA enabled */
|
|
char *dma_buf;
|
|
dma_addr_t dma_handle;
|
|
struct pci_dev *dev;
|
|
};
|
|
|
|
static inline void parport_gsc_write_data(struct parport *p, unsigned char d)
|
|
{
|
|
#ifdef DEBUG_PARPORT
|
|
printk (KERN_DEBUG "parport_gsc_write_data(%p,0x%02x)\n", p, d);
|
|
#endif
|
|
parport_writeb(d, DATA(p));
|
|
}
|
|
|
|
static inline unsigned char parport_gsc_read_data(struct parport *p)
|
|
{
|
|
unsigned char val = parport_readb (DATA (p));
|
|
#ifdef DEBUG_PARPORT
|
|
printk (KERN_DEBUG "parport_gsc_read_data(%p) = 0x%02x\n",
|
|
p, val);
|
|
#endif
|
|
return val;
|
|
}
|
|
|
|
/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that
|
|
* it doesn't do any extra masking. */
|
|
static inline unsigned char __parport_gsc_frob_control(struct parport *p,
|
|
unsigned char mask,
|
|
unsigned char val)
|
|
{
|
|
struct parport_gsc_private *priv = p->physport->private_data;
|
|
unsigned char ctr = priv->ctr;
|
|
#ifdef DEBUG_PARPORT
|
|
printk (KERN_DEBUG
|
|
"__parport_gsc_frob_control(%02x,%02x): %02x -> %02x\n",
|
|
mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
|
|
#endif
|
|
ctr = (ctr & ~mask) ^ val;
|
|
ctr &= priv->ctr_writable; /* only write writable bits. */
|
|
parport_writeb (ctr, CONTROL (p));
|
|
priv->ctr = ctr; /* Update soft copy */
|
|
return ctr;
|
|
}
|
|
|
|
static inline void parport_gsc_data_reverse(struct parport *p)
|
|
{
|
|
__parport_gsc_frob_control (p, 0x20, 0x20);
|
|
}
|
|
|
|
static inline void parport_gsc_data_forward(struct parport *p)
|
|
{
|
|
__parport_gsc_frob_control (p, 0x20, 0x00);
|
|
}
|
|
|
|
static inline void parport_gsc_write_control(struct parport *p,
|
|
unsigned char d)
|
|
{
|
|
const unsigned char wm = (PARPORT_CONTROL_STROBE |
|
|
PARPORT_CONTROL_AUTOFD |
|
|
PARPORT_CONTROL_INIT |
|
|
PARPORT_CONTROL_SELECT);
|
|
|
|
/* Take this out when drivers have adapted to newer interface. */
|
|
if (d & 0x20) {
|
|
printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
|
|
p->name, p->cad->name);
|
|
parport_gsc_data_reverse (p);
|
|
}
|
|
|
|
__parport_gsc_frob_control (p, wm, d & wm);
|
|
}
|
|
|
|
static inline unsigned char parport_gsc_read_control(struct parport *p)
|
|
{
|
|
const unsigned char rm = (PARPORT_CONTROL_STROBE |
|
|
PARPORT_CONTROL_AUTOFD |
|
|
PARPORT_CONTROL_INIT |
|
|
PARPORT_CONTROL_SELECT);
|
|
const struct parport_gsc_private *priv = p->physport->private_data;
|
|
return priv->ctr & rm; /* Use soft copy */
|
|
}
|
|
|
|
static inline unsigned char parport_gsc_frob_control(struct parport *p,
|
|
unsigned char mask,
|
|
unsigned char val)
|
|
{
|
|
const unsigned char wm = (PARPORT_CONTROL_STROBE |
|
|
PARPORT_CONTROL_AUTOFD |
|
|
PARPORT_CONTROL_INIT |
|
|
PARPORT_CONTROL_SELECT);
|
|
|
|
/* Take this out when drivers have adapted to newer interface. */
|
|
if (mask & 0x20) {
|
|
printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
|
|
p->name, p->cad->name,
|
|
(val & 0x20) ? "reverse" : "forward");
|
|
if (val & 0x20)
|
|
parport_gsc_data_reverse (p);
|
|
else
|
|
parport_gsc_data_forward (p);
|
|
}
|
|
|
|
/* Restrict mask and val to control lines. */
|
|
mask &= wm;
|
|
val &= wm;
|
|
|
|
return __parport_gsc_frob_control (p, mask, val);
|
|
}
|
|
|
|
static inline unsigned char parport_gsc_read_status(struct parport *p)
|
|
{
|
|
return parport_readb (STATUS(p));
|
|
}
|
|
|
|
static inline void parport_gsc_disable_irq(struct parport *p)
|
|
{
|
|
__parport_gsc_frob_control (p, 0x10, 0x00);
|
|
}
|
|
|
|
static inline void parport_gsc_enable_irq(struct parport *p)
|
|
{
|
|
__parport_gsc_frob_control (p, 0x10, 0x10);
|
|
}
|
|
|
|
extern void parport_gsc_release_resources(struct parport *p);
|
|
|
|
extern int parport_gsc_claim_resources(struct parport *p);
|
|
|
|
extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s);
|
|
|
|
extern void parport_gsc_save_state(struct parport *p, struct parport_state *s);
|
|
|
|
extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s);
|
|
|
|
extern void parport_gsc_inc_use_count(void);
|
|
|
|
extern void parport_gsc_dec_use_count(void);
|
|
|
|
extern struct parport *parport_gsc_probe_port(unsigned long base,
|
|
unsigned long base_hi,
|
|
int irq, int dma,
|
|
struct parisc_device *padev);
|
|
|
|
#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */
|