static int ds1338_send(I2CSlave *i2c, uint8_t data) { DS1338State *s = FROM_I2C_SLAVE(DS1338State, i2c); if (s->addr_byte) { s->ptr = data; s->addr_byte = 0; return 0; } s->nvram[s->ptr - 8] = data; if (data < 8) { qemu_get_timedate(&s->now, s->offset); switch(data) { case 0: /* TODO: Implement CH (stop) bit. */ s->now.tm_sec = from_bcd(data & 0x7f); break; case 1: s->now.tm_min = from_bcd(data & 0x7f); break; case 2: if (data & 0x40) { if (data & 0x20) { data = from_bcd(data & 0x4f) + 11; } else { data = from_bcd(data & 0x1f) - 1; } } else { data = from_bcd(data); } s->now.tm_hour = data; break; case 3: s->now.tm_wday = from_bcd(data & 7) - 1; break; case 4: s->now.tm_mday = from_bcd(data & 0x3f); break; case 5: s->now.tm_mon = from_bcd(data & 0x1f) - 1; break; case 6: s->now.tm_year = from_bcd(data) + 100; break; case 7: /* Control register. Currently ignored. */ break; } s->offset = qemu_timedate_diff(&s->now); } s->ptr = (s->ptr + 1) & 0xff; return 0; }