diff options
| author |   Mario Huettel <mario.huettel@gmx.net> | 2017-04-08 14:10:14 +0200 |
|---|---|---|
| committer |   Marc Kleine-Budde <mkl@pengutronix.de> | 2017-04-25 09:00:48 +0200 |
| commit | 428479e4714ce786629a009c66b4340a3ba651ce (patch) | |
| tree | 623d16db8390376c55a335a78527aac84dae3fca /drivers/net/can/m_can/m_can.c | |
| parent | can: m_can: Enable M_CAN version dependent initialization (diff) | |
| download | linux-dev-428479e4714ce786629a009c66b4340a3ba651ce.tar.xz linux-dev-428479e4714ce786629a009c66b4340a3ba651ce.zip | |
can: m_can: Configuration for TX and TX event FIFOs
* TX/TX Event FIFO sizes are configured for version >= v3.1.x
Signed-off-by: Mario Huettel <mario.huettel@gmx.net>
Tested-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/can/m_can/m_can.c | 39 |
1 files changed, 34 insertions, 5 deletions
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index bfc7b8424901..620c421f6f6a 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -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, |