SCF(4) OpenBSD Programmer's Manual (SPARC) SCF(4)NAMEscf - 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
display 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
<machine/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
selected. Setting the SCF_FMCTRL_WRITEV bit turns on the write voltage.
The SCF_FMCTRL_SELADDR bits determine which window of 512 KBytes is
active for reading/writing.
SEE ALSOioctl(2), intro(4), 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 4.9 January 2, 2010 OpenBSD 4.9
