add loopback and monitor mode support.
Signed-off-by: Dong Aisheng <b29396@xxxxxxxxxxxxx>
---
drivers/net/can/m_can.c | 24 ++++++++++++++++++++++--
1 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/net/can/m_can.c b/drivers/net/can/m_can.c
index e4aed71..bbe8a7d 100644
--- a/drivers/net/can/m_can.c
+++ b/drivers/net/can/m_can.c
@@ -94,8 +94,12 @@ enum m_can_lec_type {
LEC_CRC_ERROR,
LEC_UNUSED,
};
+/* Test Register (TEST) */
+#define TEST_LBCK BIT(4)
/* CC Control Register(CCCR) */
+#define CCCR_TEST BIT(7)
+#define CCCR_MON BIT(5)
#define CCCR_CCE BIT(1)
#define CCCR_INIT BIT(0)
@@ -661,13 +665,13 @@ static int m_can_set_bittiming(struct net_device *dev)
* - configure rx fifo
* - accept non-matching frame into fifo 0
* - configure tx buffer
+ * - configure mode
* - setup bittiming
- * - TODO:
- * 1) other working modes support like monitor, loopback...
*/
static void m_can_chip_config(struct net_device *dev)
{
struct m_can_priv *priv = netdev_priv(dev);
+ u32 cccr, test;
m_can_config_endisable(priv, true);
@@ -694,6 +698,22 @@ static void m_can_chip_config(struct net_device *dev)
m_can_write(priv, M_CAN_RXF1C, (priv->rxf1_elems << RXFC_FS_OFF) |
RXFC_FWM_1 | (priv->mram_off + priv->rxf1_off));
+ cccr = m_can_read(priv, M_CAN_CCCR);
+ cccr &= ~(CCCR_TEST | CCCR_MON);
+ test = m_can_read(priv, M_CAN_TEST);
+ test &= ~TEST_LBCK;
+
+ if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
+ cccr |= CCCR_MON;
+
+ if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) {
+ cccr |= CCCR_TEST;
+ test |= TEST_LBCK;
+ }
+
+ m_can_write(priv, M_CAN_CCCR, cccr);
+ m_can_write(priv, M_CAN_TEST, test);
+
/* enable all interrupts */
m_can_write(priv, M_CAN_IR, IR_ALL_INT);
m_can_write(priv, M_CAN_IE, IR_ALL_INT);
--
1.7.8
--
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