#include <assert.h>
#include "lpc47n217.h"
-/*
- * Function: pnp_enter_conf_state
- * Parameters: dev - high 8 bits = Super I/O port
- * Return Value: None
- * Description: Enable access to the LPC47N217's configuration registers.
- */
-static inline void pnp_enter_conf_state(device_t dev)
+static void pnp_enter_conf_state(device_t dev)
{
- unsigned port = dev>>8;
+ u16 port = dev >> 8;
outb(0x55, port);
}
-/*
- * Function: pnp_exit_conf_state
- * Parameters: dev - high 8 bits = Super I/O port
- * Return Value: None
- * Description: Disable access to the LPC47N217's configuration registers.
- */
static void pnp_exit_conf_state(device_t dev)
{
- unsigned port = dev>>8;
+ u16 port = dev >> 8;
outb(0xaa, port);
}
-/*
- * Function: lpc47n217_pnp_set_iobase
- * Parameters: dev - high 8 bits = Super I/O port,
- * low 8 bits = logical device number (per lpc47n217.h)
- * iobase - base I/O port for the logical device
- * Return Value:None
- * Description: Program the base I/O port for the specified logical device.
+/**
+ * Program the base I/O port for the specified logical device.
*
+ * @param dev High 8 bits = Super I/O port, low 8 bits = logical device number.
+ * @param iobase Base I/O port for the logical device.
*/
-void lpc47n217_pnp_set_iobase(device_t dev, unsigned iobase)
+void lpc47n217_pnp_set_iobase(device_t dev, u16 iobase)
{
- /* LPC47N217 requires base ports to be a multiple of 4 */
+ /* LPC47N217 requires base ports to be a multiple of 4. */
ASSERT(!(iobase & 0x3));
switch(dev & 0xFF) {
case LPC47N217_PP:
pnp_write_config(dev, 0x23, (iobase >> 2) & 0xff);
break;
-
case LPC47N217_SP1:
pnp_write_config(dev, 0x24, (iobase >> 2) & 0xff);
break;
-
case LPC47N217_SP2:
pnp_write_config(dev, 0x25, (iobase >> 2) & 0xff);
break;
-
default:
break;
}
}
-/*
- * Function: lpc47n217_pnp_set_enable
- * Parameters: dev - high 8 bits = Super I/O port,
- * low 8 bits = logical device number (per lpc47n217.h)
- * enable - 0 to disable, anythig else to enable
- * Return Value:None
- * Description: Enable or disable the specified logical device.
- * Technically, a full disable requires setting the device's base
- * I/O port below 0x100. We don't do that here, because we don't
- * have access to a data structure that specifies what the 'real'
- * base port is (when asked to enable the device). Also the function
- * is used only to disable the device while its true base port is
- * programmed (see lpc47n217_enable_serial() below).
+/**
+ * Enable or disable the specified logical device.
+ *
+ * Technically, a full disable requires setting the device's base I/O port
+ * below 0x100. We don't do that here, because we don't have access to a data
+ * structure that specifies what the 'real' base port is (when asked to enable
+ * the device). Also the function is used only to disable the device while its
+ * true base port is programmed (see lpc47n217_enable_serial() below).
+ *
+ * @param dev High 8 bits = Super I/O port, low 8 bits = logical device number.
+ * @param enable 0 to disable, anythig else to enable.
*/
void lpc47n217_pnp_set_enable(device_t dev, int enable)
{
- uint8_t power_register = 0;
- uint8_t power_mask = 0;
- uint8_t current_power;
- uint8_t new_power;
+ u8 power_register = 0, power_mask = 0, current_power, new_power;
switch(dev & 0xFF) {
case LPC47N217_PP:
power_register = 0x01;
power_mask = 0x04;
break;
-
case LPC47N217_SP1:
power_register = 0x02;
power_mask = 0x08;
break;
-
case LPC47N217_SP2:
power_register = 0x02;
power_mask = 0x80;
break;
-
default:
return;
}
current_power = pnp_read_config(dev, power_register);
- new_power = current_power & ~power_mask; /* disable by default */
-
+ new_power = current_power & ~power_mask; /* Disable by default. */
if (enable)
- new_power |= power_mask; /* Enable */
-
+ new_power |= power_mask; /* Enable. */
pnp_write_config(dev, power_register, new_power);
}
-/*
- * Function: lpc47n217_enable_serial
- * Parameters: dev - high 8 bits = Super I/O port,
- * low 8 bits = logical device number (per lpc47n217.h)
- * iobase - processor I/O port address to assign to this serial device
- * Return Value:bool
- * Description: Configure the base I/O port of the specified serial device
- * and enable the serial device.
+/**
+ * Configure the base I/O port of the specified serial device and enable the
+ * serial device.
+ *
+ * @param dev High 8 bits = Super I/O port, low 8 bits = logical device number.
+ * @param iobase Processor I/O port address to assign to this serial device.
*/
-static void lpc47n217_enable_serial(device_t dev, unsigned iobase)
+static void lpc47n217_enable_serial(device_t dev, u16 iobase)
{
- /* NOTE: Cannot use pnp_set_XXX() here because they assume chip
- * support for logical devices, which the LPC47N217 doesn't have*/
-
+ /*
+ * NOTE: Cannot use pnp_set_XXX() here because they assume chip
+ * support for logical devices, which the LPC47N217 doesn't have.
+ */
pnp_enter_conf_state(dev);
lpc47n217_pnp_set_enable(dev, 0);
lpc47n217_pnp_set_iobase(dev, iobase);
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