e0ab3dd5f9
For easier debugging this patch adds dev coredump support to the driver. A dev coredump is generated in case the chip fails to start or an error in the interrupt handler is detected. The dev coredump consists of all chip registers and chip memory, as well as the driver's internal state of the TEF-, RX- and TX-FIFOs, it can be analyzed with the mcp251xfd-dump tool of the can-utils: https://github.com/linux-can/can-utils/tree/master/mcp251xfd Link: https://lore.kernel.org/r/20210304160328.2752293-2-mkl@pengutronix.de Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
45 lines
1 KiB
C
45 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* mcp251xfd - Microchip MCP251xFD Family CAN controller driver
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*
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* Copyright (c) 2019, 2020, 2021 Pengutronix,
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* Marc Kleine-Budde <kernel@pengutronix.de>
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*/
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#ifndef _MCP251XFD_DUMP_H
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#define _MCP251XFD_DUMP_H
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#define MCP251XFD_DUMP_MAGIC 0x1825434d
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enum mcp251xfd_dump_object_type {
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MCP251XFD_DUMP_OBJECT_TYPE_REG,
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MCP251XFD_DUMP_OBJECT_TYPE_TEF,
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MCP251XFD_DUMP_OBJECT_TYPE_RX,
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MCP251XFD_DUMP_OBJECT_TYPE_TX,
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MCP251XFD_DUMP_OBJECT_TYPE_END = -1,
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};
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enum mcp251xfd_dump_object_ring_key {
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MCP251XFD_DUMP_OBJECT_RING_KEY_HEAD,
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MCP251XFD_DUMP_OBJECT_RING_KEY_TAIL,
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MCP251XFD_DUMP_OBJECT_RING_KEY_BASE,
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MCP251XFD_DUMP_OBJECT_RING_KEY_NR,
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MCP251XFD_DUMP_OBJECT_RING_KEY_FIFO_NR,
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MCP251XFD_DUMP_OBJECT_RING_KEY_OBJ_NUM,
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MCP251XFD_DUMP_OBJECT_RING_KEY_OBJ_SIZE,
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__MCP251XFD_DUMP_OBJECT_RING_KEY_MAX,
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};
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struct mcp251xfd_dump_object_header {
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__le32 magic;
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__le32 type;
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__le32 offset;
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__le32 len;
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};
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struct mcp251xfd_dump_object_reg {
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__le32 reg;
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__le32 val;
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};
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#endif
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