static int __init
ds1302_probe(void)
{
int retval, res, baur;
baur=(boot_cpu_data.bus_clock/(2*1000*1000));
printk("%s: Set PLD_RTCBAUR = %d\n", ds1302_name,baur);
outw(0x0000,(unsigned long)PLD_RTCCR);
outw(0x0000,(unsigned long)PLD_RTCRSTODT);
outw(baur,(unsigned long)PLD_RTCBAUR);
/* Try to talk to timekeeper. */
ds1302_wenable();
/* write RAM byte 0 */
/* write something magic */
out_byte_rtc(0xc0,MAGIC_PATTERN);
/* read RAM byte 0 */
if((res = in_byte_rtc(0xc1)) == MAGIC_PATTERN) {
char buf[100];
ds1302_wdisable();
printk("%s: RTC found.\n", ds1302_name);
get_rtc_status(buf);
printk(buf);
retval = 1;
} else {
printk("%s: RTC not found.\n", ds1302_name);
retval = 0;
}
return retval;
}
void
ds1302_writereg(int reg, unsigned char val)
{
ds1302_wenable();
out_byte_rtc((0x80 | (reg << 1)),val);
ds1302_wdisable();
}
void
ds1302_writereg(int reg, unsigned char val)
{
ds1302_wenable();
start();
out_byte(0x80 | (reg << 1)); /* write register */
out_byte(val);
stop();
ds1302_wdisable();
}
static int
ds1302_probe(void)
{
int retval, res;
TK_RST_DIR(1);
TK_SCL_DIR(1);
TK_SDA_DIR(0);
/* Try to talk to timekeeper. */
ds1302_wenable();
start();
out_byte(0xc0); /* write RAM byte 0 */
out_byte(MAGIC_PATTERN); /* write something magic */
start();
out_byte(0xc1); /* read RAM byte 0 */
if((res = in_byte()) == MAGIC_PATTERN) {
char buf[100];
stop();
ds1302_wdisable();
printk("%s: RTC found.\n", ds1302_name);
printk("%s: SDA, SCL, RST on PB%i, PB%i, %s%i\n",
ds1302_name,
CONFIG_ETRAX_DS1302_SDABIT,
CONFIG_ETRAX_DS1302_SCLBIT,
#ifdef CONFIG_ETRAX_DS1302_RST_ON_GENERIC_PORT
"GENIO",
#else
"PB",
#endif
CONFIG_ETRAX_DS1302_RSTBIT);
get_rtc_status(buf);
printk(buf);
retval = 1;
} else {
stop();
printk("%s: RTC not found.\n", ds1302_name);
retval = 0;
}
return retval;
}
void
ds1302_writereg(int reg, unsigned char val)
{
#ifndef CONFIG_ETRAX_RTC_READONLY
int do_writereg = 1;
#else
int do_writereg = 0;
if (reg == RTC_TRICKLECHARGER)
do_writereg = 1;
#endif
if (do_writereg) {
ds1302_wenable();
start();
out_byte(0x80 | (reg << 1)); /* write register */
out_byte(val);
stop();
ds1302_wdisable();
}
}