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Modern flexcan IP cores support two RX modes. One is using the 6 fames deep
hardware FIFO, the other is using up to 64 mailboxes (in non FIFO mode). For
now only the HW FIFO mode is activated.
In order to make use of the RX mailboxes the individual RX masking feature has
to be activated, otherwise matching mailboxes are overwritten during the
reception process. This however switches on the individual RX masking, which
uses reg_rximr registers for masking.
This patch activates the individual RX masking feature unconditionally and
initializes the mask registers (reg_rximr) with 0x0 == "don't care", which
switches off any filtering.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch converts the flexcan driver to make use of the rx-offload
can_rx_offload_irq_offload_fifo() helper function. The idea is to read
the CAN frames already in the interrupt context, as the depth of the
flexcan HW FIFO is too shallow, resulting in too many missed frames.
During a normal NAPI poll the frames are the pushed into the upper
layers.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch makes the TX mailbox selectable duing runtime. This is a preparation
patch to use of the hardware FIFO selectable via runtime. As the TX mailbox
number is different in HW FIFO and normal mode.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch converts the define FLEXCAN_IFLAG_DEFAULT into the runtime
calculated value priv->reg_imask1_default. This is a preparation patch to make
the TX mailbox selectable during runtime, too.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch changes the flexcan_irq() function to only return
IRQ_HANDLED, if the interrupt really has been handled, otherwise
IRQ_NONE is returned.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch folds in the do_bus_err() function into
flexcan_poll_bus_err().
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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rx_state, tx_state
This patch removed the not needed initialisation from the new_state,
rx_state, tx_state variabled.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch converts the rx_errors and tx_errors from int into bool
values, to reflect their actual meaning.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch changes the declaration of the devtype data to const.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch removes the write only member pdata from the struct
flexcan_priv.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch adds some missing register definitions, which are needed in an
upcoming patch.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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