SCF(4)                OpenBSD Programmer's Manual (SPARC)               SCF(4)

NAME
     scf - SPARC Force sysconfig driver

SYNOPSIS
     scf0 at mainbus0

DESCRIPTION
     The scf driver provides access to the system configuration registers on
     the Force CPU-5.  The system configuration registers control the LED dis-
     play on the front panel, the status of the rotary switch, and the flash
     programming control registers.

     By setting the sysctl(8) value machdep.led_blink to a non-zero value, the
     two user LEDs will blink back and forth at a rate of 1 second per point
     of load average.  The seven segment LED will also show a numeric value
     for the load average (in hex), and with load averages higher than 15, the
     decimal point will be lit.

IOCTLS
     The scf device responds to the following ioctl(2) calls defined in <ma-
     chine/scfio.h>:

     SCFIOCSLED1
       (u_int8_t) Set LED1 register based on the bits below.

             #define SCF_LED_COLOR_MASK      0x03    /* color bits */
             #define SCF_LED_COLOR_OFF       0x00    /* led off */
             #define SCF_LED_COLOR_GREEN     0x01    /* green led */
             #define SCF_LED_COLOR_RED       0x02    /* red led */
             #define SCF_LED_COLOR_YELLOW    0x03    /* yellow led */
             #define SCF_LED_BLINK_MASK      0x0c    /* blink bits */
             #define SCF_LED_BLINK_NONE      0x00    /* steady led */
             #define SCF_LED_BLINK_HALF      0x04    /* blink 1/2 hz */
             #define SCF_LED_BLINK_ONE       0x08    /* blink 1 hz */
             #define SCF_LED_BLINK_TWO       0x0c    /* blink 2 hz */

     SCFIOCGLED1
       (u_int8_t) Retrieve the value of the LED1 register (bits defined
       above).

     SCFIOCSLED2
       (u_int8_t) Set the value of the LED2 register (bits defined above).

     SCFIOCGLED2
       (u_int8_t) Retrieve the value of the LED2 register (bits defined
       above).

     SCFIOCSLED7
       (u_int8_t) Set the value of the 7-segment LED based on the bits below:

             #define SCF_7LED_A              0x01    /* Layout:      */
             #define SCF_7LED_B              0x02    /*      AAA     */
             #define SCF_7LED_C              0x04    /*     FF BB    */
             #define SCF_7LED_D              0x08    /*      GGG     */
             #define SCF_7LED_E              0x10    /*     EE CC    */
             #define SCF_7LED_F              0x20    /*      DDD  P  */
             #define SCF_7LED_G              0x40
             #define SCF_7LED_P              0x80

     SCFIOCGROT
       (u_int8_t) Retrieve the value of the 16 position rotary switch on the


       front panel.

     SCFIOSFMCTRL
       (u_int8_t) Set up the flash memory for writing based on the bits below:

             #define SCF_FMCTRL_SELROM       0x01    /* sel 1st/2nd device */
             #define SCF_FMCTRL_SELBOOT      0x02    /* sel boot/user flash */
             #define SCF_FMCTRL_WRITEV       0x04    /* write voltage */
             #define SCF_FMCTRL_SELADDR      0x38    /* addr 21:19 bits */

       The SCF_FMCTRL_SELROM bit, if clear, selects the first flash device,
       otherwise the second flash device is selected.  The SCF_FMCTRL_SELBOOT
       bit, if set selects the user flash, otherwise the boot flash is select-
       ed.  Setting the SCF_FMCTRL_WRITEV bit, turns on the write voltage.
       The SCF_FMCTRL_SELADDR bits determine which window of 512 KBytes is ac-
       tive for reading/writing.

SEE ALSO
     ioctl(2), sysctl(8)

HISTORY
     OpenBSD support for the scf first appeared in OpenBSD 2.6.

AUTHORS
     The driver for the scf was written by Jason L. Wright <jason@thought.net>
     under contract with RTMX Incorporated.

OpenBSD 3.0                      July 25, 1999                               2
