aboutsummaryrefslogtreecommitdiffstats
path: root/src/include/device/pnp.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/include/device/pnp.h')
-rw-r--r--src/include/device/pnp.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/src/include/device/pnp.h b/src/include/device/pnp.h
index d0d6fa36a..29df77de2 100644
--- a/src/include/device/pnp.h
+++ b/src/include/device/pnp.h
@@ -5,6 +5,7 @@
#include <rules.h>
#include <device/device.h>
#include <device/pnp_def.h>
+#include <arch/io.h>
#ifndef __SIMPLE_DEVICE__
@@ -63,5 +64,43 @@ struct pnp_mode_ops {
void pnp_enter_conf_mode(device_t dev);
void pnp_exit_conf_mode(device_t dev);
+/* PNP indexed I/O operations */
+
+/*
+ * u8 pnp_read_index(u16 port, u8 reg)
+ * Description:
+ * This routine reads indexed I/O registers. The reg byte is written
+ * to the index register at I/O address = port. The result is then
+ * read from the data register at I/O address = port + 1.
+ *
+ * Parameters:
+ * @param[in] u16 port = The I/O address of the port index register.
+ * @param[in] u8 reg = The offset within the indexed space.
+ * @param[out] u8 result = The value read back from the data register.
+ */
+static inline u8 pnp_read_index(u16 port, u8 reg)
+{
+ outb(reg, port);
+ return inb(port + 1);
+}
+
+/*
+ * void pnp_write_index(u16 port, u8 reg, u8 value)
+ * Description:
+ * This routine writes indexed I/O registers. The reg byte is written
+ * to the index register at I/O address = port. The value byte is then
+ * written to the data register at I/O address = port + 1.
+ *
+ * Parameters:
+ * @param[in] u16 port = The address of the port index register.
+ * @param[in] u8 reg = The offset within the indexed space.
+ * @param[in] u8 value = The value to be written to the data register.
+ */
+static inline void pnp_write_index(u16 port, u8 reg, u8 value)
+{
+ outb(reg, port);
+ outb(value, port + 1);
+}
+
#endif /* ! __SIMPLE_DEVICE__ */
#endif /* DEVICE_PNP_H */