Bosch M_CAN Linux Driver
Mario Huettel
1f6deec3fb
* Added defines for TX Event FIFO Element * Adapted ndo_start_xmit function. For versions >= v3.1.x it uses the TX FIFO to optimize the data throughput. It stores the echo skb at the same index as in the M_CAN's TX FIFO. The frame's message marker is set to this index. This message marker is received in the TX Event FIFO after the message was successfully transmitted. It is used to echo the correct echo skb back to the network stack. * Added m_can_echo_tx_event function. It reads all received message markers in the TX Event FIFO and loops back the corresponding echo skbs. * ISR checks for new TX Event Entry interrupt for version >= 3.1.x. Signed-off-by: Mario Huettel <mario.huettel@gmx.net> |
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| drivers/net/can/m_can | ||
| README.md | ||
Bosch M_CAN (CAN Controller) Device Driver
Files
- *.c : Driver C-Source Files
- Kconfig : Config file for menuconfig etc.
- Makefile : Makefile for Kernel Build
Compile
compile as normal Kernel Driver.
- Driver can be compiled as an externel module.
- Driver can be compiled statically into the kernel.
Device Tree
The following code shows a basic device tree for an M_CAN node:
/* M_CAN Device Tree Nodes */
hclk: hclk {
compatible = "fixed-clock";
#clock-cells = < 0 >;
clock-frequency = <50000000>;
};
cclk: cclk {
compatible = "fixed-clock";
#clock-cells = < 0 >;
clock-frequency = <40000000>;
};
mcan0: can@0xff240000 {
compatible = "bosch,m_can-3.2.1";
reg = <0xff240000 0x200>,<0xff260000 0x4000>;
reg-names = "m_can", "message_ram";
interrupt-parent = <&intc>;
/* Shared Interrupt for every M_CAN */
interrupts = <0x0 40 0x4>;
interrupt-names = "int0";
clocks = <&hclk>, <&cclk>;
clock-names = "hclk", "cclk";
bosch,mram-cfg = <0x0 128 64 64 32 64 32 32>;
};