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diff --git a/sys/arm64/rockchip/rk_i2c.c b/sys/arm64/rockchip/rk_i2c.c
--- a/sys/arm64/rockchip/rk_i2c.c
+++ b/sys/arm64/rockchip/rk_i2c.c
@@ -291,6 +291,7 @@
rk_i2c_intr_locked(struct rk_i2c_softc *sc)
{
uint32_t reg;
+ int transfer_len;
sc->ipd = RK_I2C_READ(sc, RK_I2C_IPD);
@@ -324,11 +325,16 @@
RK_I2C_WRITE(sc, RK_I2C_IEN, RK_I2C_IEN_MBRFIEN |
RK_I2C_IEN_NAKRCVIEN);
- reg = RK_I2C_READ(sc, RK_I2C_CON);
- reg |= RK_I2C_CON_LASTACK;
- RK_I2C_WRITE(sc, RK_I2C_CON, reg);
+ if ((sc->msg->len - sc->cnt) > 32)
+ transfer_len = 32;
+ else {
+ transfer_len = sc->msg->len - sc->cnt;
+ reg = RK_I2C_READ(sc, RK_I2C_CON);
+ reg |= RK_I2C_CON_LASTACK;
+ RK_I2C_WRITE(sc, RK_I2C_CON, reg);
+ }
- RK_I2C_WRITE(sc, RK_I2C_MRXCNT, sc->msg->len);
+ RK_I2C_WRITE(sc, RK_I2C_MRXCNT, transfer_len);
} else {
sc->state = STATE_WRITE;
RK_I2C_WRITE(sc, RK_I2C_IEN, RK_I2C_IEN_MBTFIEN |
@@ -344,6 +350,23 @@
if (sc->cnt == sc->msg->len)
rk_i2c_send_stop(sc);
+ else {
+ sc->mode = RK_I2C_CON_MODE_RX;
+ reg = RK_I2C_READ(sc, RK_I2C_CON) & \
+ ~RK_I2C_CON_CTRL_MASK;
+ reg |= sc->mode << RK_I2C_CON_MODE_SHIFT;
+ reg |= RK_I2C_CON_EN;
+
+ if ((sc->msg->len - sc->cnt) > 32)
+ transfer_len = 32;
+ else {
+ transfer_len = sc->msg->len - sc->cnt;
+ reg |= RK_I2C_CON_LASTACK;
+ }
+
+ RK_I2C_WRITE(sc, RK_I2C_CON, reg);
+ RK_I2C_WRITE(sc, RK_I2C_MRXCNT, transfer_len);
+ }
break;
case STATE_WRITE:
@@ -509,7 +532,7 @@
sc->mode = RK_I2C_CON_MODE_RX;
} else {
sc->mode = RK_I2C_CON_MODE_RRX;
- reg = msgs[i].slave & LSB;
+ reg = msgs[i].slave & ~LSB;
reg |= RK_I2C_MRXADDR_VALID(0);
RK_I2C_WRITE(sc, RK_I2C_MRXADDR, reg);
RK_I2C_WRITE(sc, RK_I2C_MRXRADDR, 0);

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