summaryrefslogtreecommitdiffstats
path: root/firmware/drivers/rtc/rtc_mr100.c
diff options
context:
space:
mode:
authorRobert Kukla <roolku@rockbox.org>2008-02-05 00:10:39 +0000
committerRobert Kukla <roolku@rockbox.org>2008-02-05 00:10:39 +0000
commit3f85a4bc97fb2120870fcd4a6650fd72d4a6338f (patch)
treeb05b532d3954a0d896a7bccdf69fd577c7c8c4e9 /firmware/drivers/rtc/rtc_mr100.c
parent2d12b253ae14769fdb808c972ca8e92f4416b3bb (diff)
downloadrockbox-3f85a4bc97fb2120870fcd4a6650fd72d4a6338f.tar.gz
rockbox-3f85a4bc97fb2120870fcd4a6650fd72d4a6338f.tar.bz2
rockbox-3f85a4bc97fb2120870fcd4a6650fd72d4a6338f.zip
mrobe 100, RTC: some code simplification and include init sequence from OF for reference
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16215 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/drivers/rtc/rtc_mr100.c')
-rw-r--r--firmware/drivers/rtc/rtc_mr100.c68
1 files changed, 53 insertions, 15 deletions
diff --git a/firmware/drivers/rtc/rtc_mr100.c b/firmware/drivers/rtc/rtc_mr100.c
index 96d84156a7..5bb6afee0c 100644
--- a/firmware/drivers/rtc/rtc_mr100.c
+++ b/firmware/drivers/rtc/rtc_mr100.c
@@ -40,30 +40,30 @@ static void reverse_bits(unsigned char* v, int size) {
for(j=0; j<size; j++) {
in = v[j];
- for(i=0; i<8; i++) {
- out |= (in & 1);
+ out = in;
+ for(i=0; i<7; i++) {
in = in >>1;
out = out<<1;
+ out |= (in & 1);
}
- v[j] = out>>1;
+ v[j] = out;
}
}
-static int sw_i2c(int access, unsigned char chip, unsigned char cmd,
- unsigned char* buf, int count) {
- int i;
+static int sw_i2c(int access, int cmd, unsigned char* buf, int count) {
+ int i, addr;
i2c_lock();
GPIOC_ENABLE |= 0x00000030;
- chip|=cmd<<1;
+ addr = RTC_ADDR | (cmd<<1);
if(access == SW_I2C_READ) {
- i = sw_i2c_read(chip, 0, buf, count);
+ i = sw_i2c_read(addr, 0, buf, count);
reverse_bits(buf, count);
} else {
reverse_bits(buf, count);
- i = sw_i2c_write(chip, 0, buf, count);
+ i = sw_i2c_write(addr, 0, buf, count);
}
GPIOC_ENABLE &= ~0x00000030;
@@ -77,11 +77,49 @@ static int sw_i2c(int access, unsigned char chip, unsigned char cmd,
void rtc_init(void)
{
sw_i2c_init();
+
+#if 0
+ /* init sequence from OF for reference */
+ /* currently we rely on the bootloader doing it for us */
+
+ bool flag = true;
+ unsigned char data;
+ unsigned char v[7] = {0x00,0x47,0x17,0x06,0x03,0x02,0x08}; /* random time */
+
+ if(flag) {
+
+ GPIOB_ENABLE |= 0x80;
+ GPIOB_OUTPUT_EN |= 0x80;
+ GPIOB_OUTPUT_VAL &= ~0x80;
+
+ DEV_EN |= 0x1000;
+ /* some more stuff that is not clear */
+
+ sw_i2c(SW_I2C_READ, RTC_CMD_CTRL, &data, 1);
+ if((data<<0x18)>>0x1e) { /* bit 7 & 6 */
+
+ data = 1;
+ sw_i2c(SW_I2C_WRITE, RTC_CMD_CTRL, &data, 1);
+
+ data = 1;
+ sw_i2c(SW_I2C_WRITE, RTC_CMD_CTRL, &data, 1);
+
+ data = 8;
+ sw_i2c(SW_I2C_WRITE, RTC_CMD_UNKN, &data, 1);
+
+ /* more stuff, perhaps set up time array? */
+
+ rtc_write_datetime(v);
+
+ }
+ data = 2;
+ sw_i2c(SW_I2C_WRITE, RTC_CMD_CTRL, &data, 1);
+
+ }
+ data = 2;
+ sw_i2c(SW_I2C_WRITE, RTC_CMD_CTRL, &data, 1);
+#endif
- /* to set a time while buttons are stil not working
- unsigned char v[7] = {0x00,0x47,0x17,0x06,0x03,0x02,0x08};
- rtc_write_datetime(v);
- */
}
int rtc_read_datetime(unsigned char* buf)
@@ -89,7 +127,7 @@ int rtc_read_datetime(unsigned char* buf)
int i;
unsigned char v[7];
- i = sw_i2c(SW_I2C_READ, RTC_ADDR, RTC_CMD_DATA, v, 7);
+ i = sw_i2c(SW_I2C_READ, RTC_CMD_DATA, v, 7);
v[4] &= 0x3f; /* mask out p.m. flag */
@@ -107,7 +145,7 @@ int rtc_write_datetime(unsigned char* buf)
for(i=0; i<7; i++)
v[i]=buf[6-i];
- i = sw_i2c(SW_I2C_WRITE, RTC_ADDR, RTC_CMD_DATA, v, 7);
+ i = sw_i2c(SW_I2C_WRITE, RTC_CMD_DATA, v, 7);
return i;
}