patch-2.4.0-test12 linux/include/asm-parisc/parport_gsc.h

• Lines: 194
• Date: Tue Dec 5 12:29:39 2000
• Orig file: v2.4.0-test11/linux/include/asm-parisc/parport_gsc.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test11/linux/include/asm-parisc/parport_gsc.h linux/include/asm-parisc/parport_gsc.h
@@ -0,0 +1,193 @@
+#ifndef __LINUX_PARPORT_GSC_H
+#define __LINUX_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;
+};
+
+extern __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));
+}
+
+extern __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;
+}
+
+extern __inline__ void parport_gsc_data_reverse (struct parport *p)
+{
+	__parport_gsc_frob_control (p, 0x20, 0x20);
+}
+
+extern __inline__ void parport_gsc_data_forward (struct parport *p)
+{
+	__parport_gsc_frob_control (p, 0x20, 0x00);
+}
+
+extern __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);
+}
+
+extern __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 */
+}
+
+extern __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);
+}
+
+extern __inline__ unsigned char parport_gsc_read_status(struct parport *p)
+{
+	return parport_readb (STATUS(p));
+}
+
+
+extern __inline__ void parport_gsc_disable_irq(struct parport *p)
+{
+	__parport_gsc_frob_control (p, 0x10, 0x00);
+}
+
+extern __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