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mrobe 100, RTC: some code simplification and include init sequence from OF for reference

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16215 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Robert Kukla 2008-02-05 00:10:39 +00:00
parent 2d12b253ae
commit 3f85a4bc97
1 changed files with 53 additions and 15 deletions
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68
firmware/drivers/rtc/rtc_mr100.c
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@ -40,30 +40,30 @@ static void reverse_bits(unsigned char* v, int size) {
for(j=0; j<size; j++) { for(j=0; j<size; j++) {
in = v[j]; in = v[j];
for(i=0; i<8; i++) { out = in;
out |= (in & 1); for(i=0; i<7; i++) {
in = in >>1; in = in >>1;
out = out<<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, static int sw_i2c(int access, int cmd, unsigned char* buf, int count) {
unsigned char* buf, int count) { int i, addr;
int i;
i2c_lock(); i2c_lock();
GPIOC_ENABLE |= 0x00000030; GPIOC_ENABLE |= 0x00000030;
chip|=cmd<<1; addr = RTC_ADDR | (cmd<<1);
if(access == SW_I2C_READ) { 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); reverse_bits(buf, count);
} else { } else {
reverse_bits(buf, count); reverse_bits(buf, count);
i = sw_i2c_write(chip, 0, buf, count); i = sw_i2c_write(addr, 0, buf, count);
} }
GPIOC_ENABLE &= ~0x00000030; GPIOC_ENABLE &= ~0x00000030;
@ -77,11 +77,49 @@ static int sw_i2c(int access, unsigned char chip, unsigned char cmd,
void rtc_init(void) void rtc_init(void)
{ {
sw_i2c_init(); 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) int rtc_read_datetime(unsigned char* buf)
@ -89,7 +127,7 @@ int rtc_read_datetime(unsigned char* buf)
int i; int i;
unsigned char v[7]; 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 */ 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++) for(i=0; i<7; i++)
v[i]=buf[6-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; return i;
} }