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/* versions.c
*
* Milkymist versioning driver for RTEMS
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*
* COPYRIGHT (c) 2010, 2011 Sebastien Bourdeauducq
*/
#define RTEMS_STATUS_CHECKS_USE_PRINTK
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <rtems.h>
#include <rtems/status-checks.h>
#include <bsp.h>
#include <rtems/libio.h>
#include "../include/system_conf.h"
#include "milkymist_versions.h"
#define SOC_DEVICE_NAME "/dev/soc"
#define PCB_DEVICE_NAME "/dev/pcb"
#define PCBREV_DEVICE_NAME "/dev/pcb_rev"
rtems_device_driver versions_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code sc;
sc = rtems_io_register_name(SOC_DEVICE_NAME, major, 0);
RTEMS_CHECK_SC(sc, "create SoC version device");
sc = rtems_io_register_name(PCB_DEVICE_NAME, major, 1);
RTEMS_CHECK_SC(sc, "create PCB type device");
sc = rtems_io_register_name(PCBREV_DEVICE_NAME, major, 2);
RTEMS_CHECK_SC(sc, "create PCB revision device");
return RTEMS_SUCCESSFUL;
}
static int get_soc_version(char *buffer)
{
char fmt[13];
char *version;
int len;
unsigned int id;
unsigned int major, minor, subminor, rc;
id = MM_READ(MM_SYSTEM_ID);
major = (id & 0xf0000000) >> 28;
minor = (id & 0x0f000000) >> 24;
subminor = (id & 0x00f00000) >> 20;
rc = (id & 0x000f0000) >> 16;
version = fmt;
version += sprintf(version, "%u.%u", major, minor);
if (subminor != 0)
version += sprintf(version, ".%u", subminor);
if (rc != 0)
version += sprintf(version, "RC%u", rc);
len = version - fmt;
memcpy(buffer, fmt, len);
return len;
}
static int get_pcb_type(char *buffer)
{
unsigned int id;
id = MM_READ(MM_SYSTEM_ID);
buffer[0] = (id & 0x0000ff00) >> 8;
buffer[1] = id & 0x000000ff;
return 2;
}
static int get_pcb_revision(char *buffer)
{
unsigned int v;
v = MM_READ(MM_GPIO_IN);
v = (v & 0x78) >> 3;
buffer[0] = '0' + v;
return 1;
}
rtems_device_driver versions_read(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg;
if(rw_args->offset != 0) {
rw_args->bytes_moved = 0;
return RTEMS_SUCCESSFUL;
}
switch (minor) {
case 0:
if (rw_args->count < 12) {
rw_args->bytes_moved = 0;
return RTEMS_UNSATISFIED;
}
rw_args->bytes_moved = get_soc_version((char *)rw_args->buffer);
return RTEMS_SUCCESSFUL;
case 1:
if (rw_args->count < 2) {
rw_args->bytes_moved = 0;
return RTEMS_UNSATISFIED;
}
rw_args->bytes_moved = get_pcb_type((char *)rw_args->buffer);
return RTEMS_SUCCESSFUL;
case 2:
if (rw_args->count < 1) {
rw_args->bytes_moved = 0;
return RTEMS_UNSATISFIED;
}
rw_args->bytes_moved = get_pcb_revision((char *)rw_args->buffer);
return RTEMS_SUCCESSFUL;
}
rw_args->bytes_moved = 0;
return RTEMS_UNSATISFIED;
}
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