mhu/mcan-linux-driver
1
0
Fork 0
Code Issues Pull Requests Releases 1 Wiki Activity

can: m_can: Configuration for TX and TX event FIFOs

Browse Source 
* TX/TX Event FIFO sizes are configured for version >= v3.1.x

Signed-off-by: Mario Huettel <mario.huettel@gmx.net>
This commit is contained in:
Mario Hüttel 2017-04-08 14:10:14 +02:00 committed by Mario Hüttel
parent 16cd0aaa5a
commit ae8a5eb664
1 changed files with 34 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/net/can/m_can/m_can.c
View File

@ -382,6 +382,18 @@ static inline void m_can_fifo_write(const struct m_can_priv *priv,
fpi * TXB_ELEMENT_SIZE + offset);
}
static inline u32 m_can_txe_fifo_read(const struct m_can_priv *priv,
u32 fgi,
u32 offset) {
return readl(priv->mram_base + priv->mcfg[MRAM_TXE].off +
fgi * TXE_ELEMENT_SIZE + offset);
}
static inline bool m_can_tx_fifo_full(const struct m_can_priv *priv)
{
return !!(m_can_read(priv, M_CAN_TXFQS) & TXFQS_TFQF);
}
static inline void m_can_config_endisable(const struct m_can_priv *priv,
bool enable)
{
@ -925,6 +937,7 @@ static int m_can_set_bittiming(struct net_device *dev)
* - configure rx fifo
* - accept non-matching frame into fifo 0
* - configure tx buffer
* - >= v3.1.x: TX FIFO is used
* - configure mode
* - setup bittiming
*/
@ -941,15 +954,31 @@ static void m_can_chip_config(struct net_device *dev)
/* Accept Non-matching Frames Into FIFO 0 */
m_can_write(priv, M_CAN_GFC, 0x0);
/* only support one Tx Buffer currently */
m_can_write(priv, M_CAN_TXBC, (1 << TXBC_NDTB_SHIFT) |
priv->mcfg[MRAM_TXB].off);
if (priv->version == 30) {
/* only support one Tx Buffer currently */
m_can_write(priv, M_CAN_TXBC, (1 << TXBC_NDTB_SHIFT) |
priv->mcfg[MRAM_TXB].off);
} else {
/* TX FIFO is used for newer IP Core versions */
m_can_write(priv, M_CAN_TXBC,
(priv->mcfg[MRAM_TXB].num << TXBC_TFQS_SHIFT) |
(priv->mcfg[MRAM_TXB].off));
}
/* support 64 bytes payload */
m_can_write(priv, M_CAN_TXESC, TXESC_TBDS_64BYTES);
m_can_write(priv, M_CAN_TXEFC, (1 << TXEFC_EFS_SHIFT) |
priv->mcfg[MRAM_TXE].off);
/* TX Event FIFO */
if (priv->version == 30) {
m_can_write(priv, M_CAN_TXEFC, (1 << TXEFC_EFS_SHIFT) |
priv->mcfg[MRAM_TXE].off);
} else {
/* Full TX Event FIFO is used */
m_can_write(priv, M_CAN_TXEFC,
((priv->mcfg[MRAM_TXE].num << TXEFC_EFS_SHIFT)
& TXEFC_EFS_MASK) |
priv->mcfg[MRAM_TXE].off);
}
/* rx fifo configuration, blocking mode, fifo size 1 */
m_can_write(priv, M_CAN_RXF0C,