man pages section 9: DDI and DKI Kernel Functions

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Updated: July 2014



csx_ModifyConfiguration - modify socket and PC Card Configuration Register


#include <sys/pccard.h> 

int32_t csx_ModifyConfiguration(client_handle_t ch, modify_config_t *mc);

Interface Level

Solaris DDI Specific (Solaris DDI)



Client handle returned from csx_RegisterClient(9F).


Pointer to a modify_config_t structure.


This function allows a socket and PC Card configuration to be modified. This function can only modify a configuration requested via csx_RequestConfiguration(9F).

Structure Members

The structure members of modify_config_t are:

uint32_t     Socket;        /* socket number */
uint32_t     Attributes;    /* attributes to modify */
uint32_t     Vpp1;          /* Vpp1 value */
uint32_t     Vpp2;          /* Vpp2 value */

The fields are defined as follows:


Not used in Solaris, but for portability with other Card Services implementations, it should be set to the logical socket number.


This field is bit-mapped. The following bits are defined:


Enable IRQ steering. Set to connect the PC Card IREQ line to a previously selected system interrupt.


IRQ change valid. Set to request the IRQ steering enable to be changed.


Vpp1 change valid. These bits are set to request a change to the corresponding voltage level for the PC Card.


Vpp2 change valid. These bits are set to request a change to the corresponding voltage level for the PC Card.


Override VS pins. For Low Voltage keyed cards, must be set if a client desires to apply a voltage inappropriate for this card to any pin. After card insertion and prior to the first csx_RequestConfiguration(9F) call for this client, the voltage levels applied to the card will be those specified by the Card Interface Specification. (See WARNINGS.)

Vpp1, Vpp2

Represent voltages expressed in tenths of a volt. Values from 0 to 25.5 volts may be set. To be valid, the exact voltage must be available from the system. To be compliant with the PC Card 95 Standard, PCMCIA/JEIDA, systems must always support 5.0 volts for both Vcc and Vpp. (See WARNINGS.)

Return Values


Successful operation.


Client handle is invalid or csx_RequestConfiguration(9F) not done.


Error getting/setting socket hardware parameters.


Requested Vpp is not available on socket.


No PC Card in socket.


No PCMCIA hardware installed.


This function may be called from user or kernel context.

See also

csx_RegisterClient(9F), csx_ReleaseConfiguration(9F), csx_ReleaseIO(9F), csx_ReleaseIRQ(9F), csx_RequestConfiguration(9F), csx_RequestIO(9F), csx_RequestIRQ(9F)

PC Card 95 Standard, PCMCIA/JEIDA


  1. CONF_VSOVERRIDE is provided for clients that have a need to override the information provided in the CIS. The client must exercise caution when setting this as it overrides any voltage level protection provided by Card Services.

  2. Using csx_ModifyConfiguration() to set Vpp to 0 volts may result in the loss of a PC Card's state. Any client setting Vpp to 0 volts is responsible for insuring that the PC Card's state is restored when power is re-applied to the card.


Mapped IO addresses can only be changed by first releasing the current configuration and IO resources with csx_ReleaseConfiguration(9F) and csx_ReleaseIO(9F), requesting new IO resources and a new configuration with csx_RequestIO(9F), followed by csx_RequestConfiguration(9F).

IRQ priority can only be changed by first releasing the current configuration and IRQ resources with csx_ReleaseConfiguration(9F) and csx_ReleaseIRQ(9F), requesting new IRQ resources and a new configuration with csx_RequestIRQ(9F), followed by csx_RequestConfiguration(9F).

Vcc can not be changed using csx_ModifyConfiguration(). Vcc may be changed by first invoking csx_ReleaseConfiguration(9F), followed by csx_RequestConfiguration(9F) with a new Vcc value.