[PATCH 2/7] add lpt_io_direct to lpt_io module

[Maksim Kuleshov]

> From fe925f4b2ca85e1ba31e9f4deb5c13f725621f25 Mon Sep 17 00:00:00 2001

From: Maksim Kuleshov 
Date: Sat, 30 Mar 2013 21:31:44 +0400
Subject: [PATCH 2/7] add lpt_io_direct to lpt_io module

Signed-off-by: Maksim Kuleshov 
---
 lpt_io.c |   90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 lpt_io.h |    1 +
 2 files changed, 91 insertions(+)

diff --git a/lpt_io.c b/lpt_io.c
index 638f6e9..e388cd5 100644
--- a/lpt_io.c
+++ b/lpt_io.c
@@ -15,7 +15,97 @@ struct lpt_io_driver {
    void *private;
 };

+#ifdef HAVE_DIRECT_IO
+#if defined(__i386__) || defined(__x86_64__)
+#include "hwaccess.h"
+extern int rget_io_perms(void);
+//FIXME 'int rget_io_perms(void)' declared in "programmer.h", not in "hwaccess.h"
+#else
+#error PCI port I/O access is not supported on this architecture yet.
+#endif
+
+static struct lpt_io_private_direct {
+	uint16_t iobase;
+} lpt_io_private_direct;
+
+static int lpt_io_direct_shutdown(void *data)
+{
+	(void)data;
+	return 0;
+}
+
+static void lpt_io_direct_out_data(lpt_io_context_t context, uint8_t data)
+{
+	struct lpt_io_driver *driver = context;
+	struct lpt_io_private_direct *private = driver->private;
+	OUTB(data, private->iobase + 0);
+}
+
+static void lpt_io_direct_out_control(lpt_io_context_t context, uint8_t data)
+{
+	struct lpt_io_driver *driver = context;
+	struct lpt_io_private_direct *private = driver->private;
+	OUTB(data, private->iobase + 2);
+}
+
+static uint8_t lpt_io_direct_in_data(lpt_io_context_t context)
+{
+	struct lpt_io_driver *driver = context;
+	struct lpt_io_private_direct *private = driver->private;
+	return INB(private->iobase + 0);
+}
+
+static uint8_t lpt_io_direct_in_status(lpt_io_context_t context)
+{
+	struct lpt_io_driver *driver = context;
+	struct lpt_io_private_direct *private = driver->private;
+	return INB(private->iobase + 1);
+}
+
+static uint8_t lpt_io_direct_in_control(lpt_io_context_t context)
+{
+	struct lpt_io_driver *driver = context;
+	struct lpt_io_private_direct *private = driver->private;
+	return INB(private->iobase + 2);
+}
+
+static int lpt_io_direct_init(lpt_io_context_t * p_context, void *data);
+
+static struct lpt_io_driver lpt_io_driver_direct = {
+	.method = "direct",
+	.init = lpt_io_direct_init,
+	.out_data = lpt_io_direct_out_data,
+	.out_control = lpt_io_direct_out_control,
+	.in_data = lpt_io_direct_in_data,
+	.in_status = lpt_io_direct_in_status,
+	.in_control = lpt_io_direct_in_control,
+	.shutdown = lpt_io_direct_shutdown,
+};
+
+static int lpt_io_direct_init(lpt_io_context_t * p_context, void *data)
+{
+	struct lpt_io_driver *driver = &lpt_io_driver_direct;
+	struct lpt_io_private_direct *private = &lpt_io_private_direct;
+	driver->private = (void *)private;
+	private->iobase = *(unsigned long *)data;
+
+	if (rget_io_perms()) {
+		return 1;
+	}
+
+	if (driver->shutdown) {
+		register_shutdown(driver->shutdown, driver);
+	}
+
+	*p_context = (lpt_io_context_t) driver;
+	return 0;
+}
+#endif
+
 static struct lpt_io_driver *lpt_io_drivers[] = {
+#ifdef HAVE_DIRECT_IO
+	&lpt_io_driver_direct,
+#endif
    NULL
 };

diff --git a/lpt_io.h b/lpt_io.h
index a4912e8..5777654 100644
--- a/lpt_io.h
+++ b/lpt_io.h
@@ -1,3 +1,4 @@
+#define HAVE_DIRECT_IO		//FIXME must be defined in Makefile
 #ifndef lpt_io_h_included_
 #define lpt_io_h_included_