patch-2.4.0-test3 linux/drivers/acpi/events/evsci.c

• Lines: 303
• Date: Wed Jul 5 11:23:12 2000
• Orig file: v2.4.0-test2/linux/drivers/acpi/events/evsci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/drivers/acpi/events/evsci.c linux/drivers/acpi/events/evsci.c
@@ -0,0 +1,302 @@
+/******************************************************************************
+ *
+ * Module Name: evsci - System Control Interrupt configuration and
+ *                      legacy to ACPI mode state transition functions
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000 R. Byron Moore
+ *
+ *  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
+ */
+
+#include "acpi.h"
+#include "namesp.h"
+#include "hardware.h"
+#include "events.h"
+
+
+#define _COMPONENT          EVENT_HANDLING
+	 MODULE_NAME         ("evsci");
+
+
+/*
+ * Elements correspond to counts for
+ * TMR, NOT_USED, GBL, PWR_BTN, SLP_BTN, RTC,
+ * and GENERAL respectively.  These counts
+ * are modified by the ACPI interrupt handler...
+ * Note that GENERAL should probably be split out
+ * into one element for each bit in the GPE
+ * registers
+ */
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_ev_sci_handler
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      Status code indicates whether interrupt was handled.
+ *
+ * DESCRIPTION: Interrupt handler that will figure out what function or
+ *              control method to call to deal with a SCI.  Installed
+ *              using BU interrupt support.
+ *
+ ******************************************************************************/
+
+u32
+acpi_ev_sci_handler (void *context)
+{
+	u32 interrupt_handled = INTERRUPT_NOT_HANDLED;
+
+	/*
+	 * ACPI Enabled?
+	 * -------------
+	 * Make sure that ACPI is enabled by checking SCI_EN.  Note that we are
+	 * required to treat the SCI interrupt as sharable, level, active low.
+	 */
+	if (!acpi_hw_register_access (ACPI_READ, ACPI_MTX_DO_NOT_LOCK, (s32)SCI_EN)) {
+		REPORT_ERROR ("Received and SCI but ACPI is not enabled.");
+		return (INTERRUPT_NOT_HANDLED);
+	}
+
+	/*
+	 * Fixed Acpi_events:
+	 * -------------
+	 * Check for and dispatch any Fixed Acpi_events that have occurred
+	 */
+	interrupt_handled |= acpi_ev_fixed_event_detect ();
+
+	/*
+	 * GPEs:
+	 * -----
+	 * Check for and dispatch any GPEs that have occurred
+	 */
+	interrupt_handled |= acpi_ev_gpe_detect ();
+
+	return (interrupt_handled);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_ev_install_sci_handler
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Installs SCI handler.
+ *
+ ******************************************************************************/
+
+u32
+acpi_ev_install_sci_handler (void)
+{
+	u32 except = AE_OK;
+
+	except = acpi_os_install_interrupt_handler (
+		(u32) acpi_gbl_FACP->sci_int,
+		acpi_ev_sci_handler,
+		NULL);
+
+	return (except);
+}
+
+
+/******************************************************************************
+
+ *
+ * FUNCTION:    Acpi_ev_remove_sci_handler
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      E_OK if handler uninstalled OK, E_ERROR if handler was not
+ *              installed to begin with
+ *
+ * DESCRIPTION: Restores original status of all fixed event enable bits and
+ *              removes SCI handler.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ev_remove_sci_handler (void)
+{
+#if 0
+	/* TBD:[Investigate] Figure this out!!  Disable all events first ???  */
+
+	if (original_fixed_enable_bit_status ^ 1 << acpi_event_index (TMR_FIXED_EVENT)) {
+		acpi_event_disable_event (TMR_FIXED_EVENT);
+	}
+
+	if (original_fixed_enable_bit_status ^ 1 << acpi_event_index (GBL_FIXED_EVENT)) {
+		acpi_event_disable_event (GBL_FIXED_EVENT);
+	}
+
+	if (original_fixed_enable_bit_status ^ 1 << acpi_event_index (PWR_BTN_FIXED_EVENT)) {
+		acpi_event_disable_event (PWR_BTN_FIXED_EVENT);
+	}
+
+	if (original_fixed_enable_bit_status ^ 1 << acpi_event_index (SLP_BTN_FIXED_EVENT)) {
+		acpi_event_disable_event (SLP_BTN_FIXED_EVENT);
+	}
+
+	if (original_fixed_enable_bit_status ^ 1 << acpi_event_index (RTC_FIXED_EVENT)) {
+		acpi_event_disable_event (RTC_FIXED_EVENT);
+	}
+
+	original_fixed_enable_bit_status = 0;
+
+#endif
+
+	acpi_os_remove_interrupt_handler (
+		(u32) acpi_gbl_FACP->sci_int,
+		acpi_ev_sci_handler);
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_ev_sci_count
+ *
+ * PARAMETERS:  char * Event_name       name (fully qualified name from namespace
+ *                                      or one of the fixed event names defined above)
+ *                                      of the event to check if it's generated an SCI.
+ *
+ * RETURN:      Number of SCI's for requested event since last time i_sci_occured()
+ *              was called for this event.
+ *
+ * DESCRIPTION: Checks to see if SCI has been generated from requested source
+ *              since the last time this function was called.
+ *
+ ******************************************************************************/
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_ev_restore_acpi_state
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: Restore the original ACPI state of the machine
+ *
+ ******************************************************************************/
+
+void
+acpi_ev_restore_acpi_state (void)
+{
+	s32                     index;
+
+
+	/* Restore the state of the chipset enable bits. */
+
+	if (acpi_gbl_restore_acpi_chipset == TRUE) {
+		/* Restore the fixed events */
+
+		if (acpi_os_in16 (acpi_gbl_FACP->pm1a_evt_blk + 2) !=
+			acpi_gbl_pm1_enable_register_save)
+		{
+			acpi_os_out16 ((acpi_gbl_FACP->pm1a_evt_blk + 2),
+					   acpi_gbl_pm1_enable_register_save);
+		}
+
+		if (acpi_gbl_FACP->pm1b_evt_blk) {
+			if (acpi_os_in16 (acpi_gbl_FACP->pm1b_evt_blk + 2) !=
+				acpi_gbl_pm1_enable_register_save)
+			{
+				acpi_os_out16 ((acpi_gbl_FACP->pm1b_evt_blk + 2),
+						   acpi_gbl_pm1_enable_register_save);
+			}
+		}
+
+
+		/* Ensure that all status bits are clear */
+
+		acpi_hw_clear_acpi_status ();
+
+
+		/* Now restore the GPEs */
+
+		for (index = 0; index < DIV_2 (acpi_gbl_FACP->gpe0blk_len); index++) {
+			if (acpi_os_in8 (acpi_gbl_FACP->gpe0blk +
+				DIV_2 (acpi_gbl_FACP->gpe0blk_len)) !=
+				acpi_gbl_gpe0enable_register_save[index])
+			{
+				acpi_os_out8 ((acpi_gbl_FACP->gpe0blk +
+						  DIV_2 (acpi_gbl_FACP->gpe0blk_len)),
+						  acpi_gbl_gpe0enable_register_save[index]);
+			}
+		}
+
+		if (acpi_gbl_FACP->gpe1_blk && acpi_gbl_FACP->gpe1_blk_len) {
+			for (index = 0; index < DIV_2 (acpi_gbl_FACP->gpe1_blk_len); index++) {
+				if (acpi_os_in8 (acpi_gbl_FACP->gpe1_blk +
+					DIV_2 (acpi_gbl_FACP->gpe1_blk_len)) !=
+					acpi_gbl_gpe1_enable_register_save[index])
+				{
+					acpi_os_out8 ((acpi_gbl_FACP->gpe1_blk +
+							  DIV_2 (acpi_gbl_FACP->gpe1_blk_len)),
+							  acpi_gbl_gpe1_enable_register_save[index]);
+				}
+			}
+		}
+
+		if (acpi_hw_get_mode() != acpi_gbl_original_mode) {
+			acpi_hw_set_mode (acpi_gbl_original_mode);
+		}
+	}
+
+	return;
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_ev_terminate
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: free memory allocated for table storage.
+ *
+ ******************************************************************************/
+
+void
+acpi_ev_terminate (void)
+{
+
+	/*
+	 * Free global tables, etc.
+	 */
+
+	if (acpi_gbl_gpe_registers) {
+		acpi_cm_free (acpi_gbl_gpe_registers);
+	}
+
+	if (acpi_gbl_gpe_info) {
+		acpi_cm_free (acpi_gbl_gpe_info);
+	}
+
+	return;
+}
+
+