te
Copyright (c) 1996, Sun Microsystems, Inc. All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
csx_event_handler - PC Card driver event handler

#include <sys/pccard.h>



int32_t prefixevent_handler(event_t event, int32_t priority,
 event_callback_args_t *args);

Solaris architecture specific (Solaris DDI)

event priority args

Each instance of a PC Card driver must register an event handler to manage events associated with its PC Card. The driver event handler is registered using the event_handler field of the client_req_t structure passed to csx_RegisterClient(9F). The driver may also supply a parameter to be passed to its event handler function using the event_callback_args.client_data field. Typically, this argument is the driver instance's soft state pointer. The driver also registers which events it is interested in receiving through the EventMask field of the client_req_t structure.

Each event is delivered to the driver with a priority, priority. High priority events with CS_EVENT_PRI_HIGH set in priority are delivered above lock level, and the driver must use its high-level event mutex initialized with the iblk_cookie returned by csx_RegisterClient(9F) to protect such events. Low priority events with CS_EVENT_PRI_LOW set in priority are delivered below lock level, and the driver must use its low-level event mutex initialized with a NULL interrupt cookie to protect these events.

csx_RegisterClient(9F) registers the driver's event handler, but no events begin to be delivered to the driver until after a successful call to csx_RequestSocketMask(9F).

In all cases, Card Services delivers an event to each driver instance associated with a function on a multiple function PC Card.

The events and their indications are listed below; they are always delivered as low priority unless otherwise noted: CS_EVENT_REGISTRATION_COMPLETE

CS_EVENT_CARD_INSERTION CS_EVENT_CARD_READY CS_EVENT_CARD_REMOVAL CS_EVENT_BATTERY_LOW CS_EVENT_BATTERY_DEAD CS_EVENT_PM_RESUME CS_EVENT_PM_SUSPEND CS_EVENT_CARD_LOCK CS_EVENT_CARD_UNLOCK CS_EVENT_EJECTION_REQUEST CS_EVENT_EJECTION_COMPLETE CS_EVENT_ERASE_COMPLETE CS_EVENT_INSERTION_REQUEST CS_EVENT_INSERTION_COMPLETE CS_EVENT_CARD_RESET CS_EVENT_RESET_REQUEST CS_EVENT_RESET_COMPLETE CS_EVENT_RESET_PHYSICAL CS_EVENT_CLIENT_INFO CS_EVENT_WRITE_PROTECT

The structure members of event_callback_args_t are:

void *info; /* event-specific information */
void *client_data; /* driver-private data */
client_info_t client_info; /* client information*/

The structure members of client_info_t are:

unit32_t Attributes; /* attributes */
unit32_t Revisions; /* version number */
uint32_t CSLevel; /* Card Services version */
uint32_t RevDate; /* revision date */
char ClientName[CS_CLIENT_INFO_MAX_NAME_LEN];
 /*PC Card driver description */
char VendorName[CS_CLIENT_INFO_MAX_NAME_LEN];
 /*PC Card driver vendor name */
char DriverName[MODMAXNAMELEN];
 /* PC Card driver name */

CS_SUCCESS CS_UNSUPPORTED_EVENT CS_FAILURE

This function is called from high-level interrupt context in the case of high priority events, and from kernel context in the case of low priority events.

static int
xx_event(event_t event, int priority, event_callback_args_t *args)
{
 int rval;
 struct xxx *xxx = args->client_data;
 client_info_t *info = &args->client_info;

 switch (event) {
 case CS_EVENT_REGISTRATION_COMPLETE:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 mutex_enter(&xxx->event_mutex);
 xxx->card_state |= XX_REGISTRATION_COMPLETE;
 mutex_exit(&xxx->event_mutex);
 rval = CS_SUCCESS;
 break;

 case CS_EVENT_CARD_READY:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 rval = xx_card_ready(xxx);
 mutex_exit(&xxx->event_mutex);
 break;

 case CS_EVENT_CARD_INSERTION:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 mutex_enter(&xxx->event_mutex);
 rval = xx_card_insertion(xxx);
 mutex_exit(&xxx->event_mutex);
 break;

 case CS_EVENT_CARD_REMOVAL:
 if (priority & CS_EVENT_PRI_HIGH) {
 mutex_enter(&xxx->hi_event_mutex);
 xxx->card_state &= ~XX_CARD_PRESENT;
 mutex_exit(&xxx->hi_event_mutex);
 } else {
 mutex_enter(&xxx->event_mutex);
 rval = xx_card_removal(xxx);
 mutex_exit(&xxx->event_mutex);
 }
 break;

 case CS_EVENT_CLIENT_INFO:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 if (GET_CLIENT_INFO_SUBSVC_CS(info->Attributes) ==
 CS_CLIENT_INFO_SUBSVC_CS) {
 info->Attributes |= CS_CLIENT_INFO_VALID;
 info->Revision = 4;
 info->CSLevel = CS_VERSION;
 info->RevDate = CS_CLIENT_INFO_MAKE_DATE(4, 7, 17);
 (void)strncpy(info->ClientName,
 "WhizBang Ultra Zowie PC card driver",
 CS_CLIENT_INFO_MAX_NAME_LEN)

 "ACME PC card drivers, Inc.",
 CS_CLIENT_INFO_MAX_NAME_LEN);
 rval = CS_SUCCESS;
 } else {
 rval = CS_UNSUPPORTED_EVENT;
 }
 break;


 case CS_EVENT_WRITE_PROTECT:
 ASSERT(priority & CS_EVENT_PRI_LOW);
 mutex_enter(&xxx->event_mutex);
 if (args->info == CS_EVENT_WRITE_PROTECT_WPOFF) {
 xxx->card_state &= ~XX_WRITE_PROTECTED;
 } else {
 xxx->card_state |= XX_WRITE_PROTECTED;
 }
 mutex_exit(&xxx->event_mutex);
 rval = CS_SUCCESS;
 break;

 default:
 rval = CS_UNSUPPORTED_EVENT;
 break;
 }

 return (rval);
}

csx_Event2Text(9F), csx_RegisterClient(9F), csx_RequestSocketMask(9F)

PC Card 95 Standard, PCMCIA/JEIDA