--- /dev/null
+/*
+ * 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 <campbell@torque.net>
+ * 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 pci_dev *dev);
+
+#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */
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