| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Marc Kleine-Budde | 3455 | 99.68% | 34 | 94.44% |
| Ursula Maplehurst | 10 | 0.29% | 1 | 2.78% |
| Vincent Mailhol | 1 | 0.03% | 1 | 2.78% |
| Total | 3466 | 36 |
/* SPDX-License-Identifier: GPL-2.0 * * mcp251xfd - Microchip MCP251xFD Family CAN controller driver * * Copyright (c) 2019, 2020, 2021 Pengutronix, * Marc Kleine-Budde <kernel@pengutronix.de> * Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org> */ #ifndef _MCP251XFD_H #define _MCP251XFD_H #include <linux/bitfield.h> #include <linux/can/core.h> #include <linux/can/dev.h> #include <linux/can/rx-offload.h> #include <linux/gpio/consumer.h> #include <linux/kernel.h> #include <linux/netdevice.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/spi/spi.h> #include <linux/timecounter.h> #include <linux/workqueue.h> /* MPC251x registers */ /* CAN FD Controller Module SFR */ #define MCP251XFD_REG_CON 0x00 #define MCP251XFD_REG_CON_TXBWS_MASK GENMASK(31, 28) #define MCP251XFD_REG_CON_ABAT BIT(27) #define MCP251XFD_REG_CON_REQOP_MASK GENMASK(26, 24) #define MCP251XFD_REG_CON_MODE_MIXED 0 #define MCP251XFD_REG_CON_MODE_SLEEP 1 #define MCP251XFD_REG_CON_MODE_INT_LOOPBACK 2 #define MCP251XFD_REG_CON_MODE_LISTENONLY 3 #define MCP251XFD_REG_CON_MODE_CONFIG 4 #define MCP251XFD_REG_CON_MODE_EXT_LOOPBACK 5 #define MCP251XFD_REG_CON_MODE_CAN2_0 6 #define MCP251XFD_REG_CON_MODE_RESTRICTED 7 #define MCP251XFD_REG_CON_OPMOD_MASK GENMASK(23, 21) #define MCP251XFD_REG_CON_TXQEN BIT(20) #define MCP251XFD_REG_CON_STEF BIT(19) #define MCP251XFD_REG_CON_SERR2LOM BIT(18) #define MCP251XFD_REG_CON_ESIGM BIT(17) #define MCP251XFD_REG_CON_RTXAT BIT(16) #define MCP251XFD_REG_CON_BRSDIS BIT(12) #define MCP251XFD_REG_CON_BUSY BIT(11) #define MCP251XFD_REG_CON_WFT_MASK GENMASK(10, 9) #define MCP251XFD_REG_CON_WFT_T00FILTER 0x0 #define MCP251XFD_REG_CON_WFT_T01FILTER 0x1 #define MCP251XFD_REG_CON_WFT_T10FILTER 0x2 #define MCP251XFD_REG_CON_WFT_T11FILTER 0x3 #define MCP251XFD_REG_CON_WAKFIL BIT(8) #define MCP251XFD_REG_CON_PXEDIS BIT(6) #define MCP251XFD_REG_CON_ISOCRCEN BIT(5) #define MCP251XFD_REG_CON_DNCNT_MASK GENMASK(4, 0) #define MCP251XFD_REG_NBTCFG 0x04 #define MCP251XFD_REG_NBTCFG_BRP_MASK GENMASK(31, 24) #define MCP251XFD_REG_NBTCFG_TSEG1_MASK GENMASK(23, 16) #define MCP251XFD_REG_NBTCFG_TSEG2_MASK GENMASK(14, 8) #define MCP251XFD_REG_NBTCFG_SJW_MASK GENMASK(6, 0) #define MCP251XFD_REG_DBTCFG 0x08 #define MCP251XFD_REG_DBTCFG_BRP_MASK GENMASK(31, 24) #define MCP251XFD_REG_DBTCFG_TSEG1_MASK GENMASK(20, 16) #define MCP251XFD_REG_DBTCFG_TSEG2_MASK GENMASK(11, 8) #define MCP251XFD_REG_DBTCFG_SJW_MASK GENMASK(3, 0) #define MCP251XFD_REG_TDC 0x0c #define MCP251XFD_REG_TDC_EDGFLTEN BIT(25) #define MCP251XFD_REG_TDC_SID11EN BIT(24) #define MCP251XFD_REG_TDC_TDCMOD_MASK GENMASK(17, 16) #define MCP251XFD_REG_TDC_TDCMOD_AUTO 2 #define MCP251XFD_REG_TDC_TDCMOD_MANUAL 1 #define MCP251XFD_REG_TDC_TDCMOD_DISABLED 0 #define MCP251XFD_REG_TDC_TDCO_MASK GENMASK(14, 8) #define MCP251XFD_REG_TDC_TDCV_MASK GENMASK(5, 0) #define MCP251XFD_REG_TBC 0x10 #define MCP251XFD_REG_TSCON 0x14 #define MCP251XFD_REG_TSCON_TSRES BIT(18) #define MCP251XFD_REG_TSCON_TSEOF BIT(17) #define MCP251XFD_REG_TSCON_TBCEN BIT(16) #define MCP251XFD_REG_TSCON_TBCPRE_MASK GENMASK(9, 0) #define MCP251XFD_REG_VEC 0x18 #define MCP251XFD_REG_VEC_RXCODE_MASK GENMASK(30, 24) #define MCP251XFD_REG_VEC_TXCODE_MASK GENMASK(22, 16) #define MCP251XFD_REG_VEC_FILHIT_MASK GENMASK(12, 8) #define MCP251XFD_REG_VEC_ICODE_MASK GENMASK(6, 0) #define MCP251XFD_REG_INT 0x1c #define MCP251XFD_REG_INT_IF_MASK GENMASK(15, 0) #define MCP251XFD_REG_INT_IE_MASK GENMASK(31, 16) #define MCP251XFD_REG_INT_IVMIE BIT(31) #define MCP251XFD_REG_INT_WAKIE BIT(30) #define MCP251XFD_REG_INT_CERRIE BIT(29) #define MCP251XFD_REG_INT_SERRIE BIT(28) #define MCP251XFD_REG_INT_RXOVIE BIT(27) #define MCP251XFD_REG_INT_TXATIE BIT(26) #define MCP251XFD_REG_INT_SPICRCIE BIT(25) #define MCP251XFD_REG_INT_ECCIE BIT(24) #define MCP251XFD_REG_INT_TEFIE BIT(20) #define MCP251XFD_REG_INT_MODIE BIT(19) #define MCP251XFD_REG_INT_TBCIE BIT(18) #define MCP251XFD_REG_INT_RXIE BIT(17) #define MCP251XFD_REG_INT_TXIE BIT(16) #define MCP251XFD_REG_INT_IVMIF BIT(15) #define MCP251XFD_REG_INT_WAKIF BIT(14) #define MCP251XFD_REG_INT_CERRIF BIT(13) #define MCP251XFD_REG_INT_SERRIF BIT(12) #define MCP251XFD_REG_INT_RXOVIF BIT(11) #define MCP251XFD_REG_INT_TXATIF BIT(10) #define MCP251XFD_REG_INT_SPICRCIF BIT(9) #define MCP251XFD_REG_INT_ECCIF BIT(8) #define MCP251XFD_REG_INT_TEFIF BIT(4) #define MCP251XFD_REG_INT_MODIF BIT(3) #define MCP251XFD_REG_INT_TBCIF BIT(2) #define MCP251XFD_REG_INT_RXIF BIT(1) #define MCP251XFD_REG_INT_TXIF BIT(0) /* These IRQ flags must be cleared by SW in the CAN_INT register */ #define MCP251XFD_REG_INT_IF_CLEARABLE_MASK \ (MCP251XFD_REG_INT_IVMIF | MCP251XFD_REG_INT_WAKIF | \ MCP251XFD_REG_INT_CERRIF | MCP251XFD_REG_INT_SERRIF | \ MCP251XFD_REG_INT_MODIF) #define MCP251XFD_REG_RXIF 0x20 #define MCP251XFD_REG_TXIF 0x24 #define MCP251XFD_REG_RXOVIF 0x28 #define MCP251XFD_REG_TXATIF 0x2c #define MCP251XFD_REG_TXREQ 0x30 #define MCP251XFD_REG_TREC 0x34 #define MCP251XFD_REG_TREC_TXBO BIT(21) #define MCP251XFD_REG_TREC_TXBP BIT(20) #define MCP251XFD_REG_TREC_RXBP BIT(19) #define MCP251XFD_REG_TREC_TXWARN BIT(18) #define MCP251XFD_REG_TREC_RXWARN BIT(17) #define MCP251XFD_REG_TREC_EWARN BIT(16) #define MCP251XFD_REG_TREC_TEC_MASK GENMASK(15, 8) #define MCP251XFD_REG_TREC_REC_MASK GENMASK(7, 0) #define MCP251XFD_REG_BDIAG0 0x38 #define MCP251XFD_REG_BDIAG0_DTERRCNT_MASK GENMASK(31, 24) #define MCP251XFD_REG_BDIAG0_DRERRCNT_MASK GENMASK(23, 16) #define MCP251XFD_REG_BDIAG0_NTERRCNT_MASK GENMASK(15, 8) #define MCP251XFD_REG_BDIAG0_NRERRCNT_MASK GENMASK(7, 0) #define MCP251XFD_REG_BDIAG1 0x3c #define MCP251XFD_REG_BDIAG1_DLCMM BIT(31) #define MCP251XFD_REG_BDIAG1_ESI BIT(30) #define MCP251XFD_REG_BDIAG1_DCRCERR BIT(29) #define MCP251XFD_REG_BDIAG1_DSTUFERR BIT(28) #define MCP251XFD_REG_BDIAG1_DFORMERR BIT(27) #define MCP251XFD_REG_BDIAG1_DBIT1ERR BIT(25) #define MCP251XFD_REG_BDIAG1_DBIT0ERR BIT(24) #define MCP251XFD_REG_BDIAG1_TXBOERR BIT(23) #define MCP251XFD_REG_BDIAG1_NCRCERR BIT(21) #define MCP251XFD_REG_BDIAG1_NSTUFERR BIT(20) #define MCP251XFD_REG_BDIAG1_NFORMERR BIT(19) #define MCP251XFD_REG_BDIAG1_NACKERR BIT(18) #define MCP251XFD_REG_BDIAG1_NBIT1ERR BIT(17) #define MCP251XFD_REG_BDIAG1_NBIT0ERR BIT(16) #define MCP251XFD_REG_BDIAG1_BERR_MASK \ (MCP251XFD_REG_BDIAG1_DLCMM | MCP251XFD_REG_BDIAG1_ESI | \ MCP251XFD_REG_BDIAG1_DCRCERR | MCP251XFD_REG_BDIAG1_DSTUFERR | \ MCP251XFD_REG_BDIAG1_DFORMERR | MCP251XFD_REG_BDIAG1_DBIT1ERR | \ MCP251XFD_REG_BDIAG1_DBIT0ERR | MCP251XFD_REG_BDIAG1_TXBOERR | \ MCP251XFD_REG_BDIAG1_NCRCERR | MCP251XFD_REG_BDIAG1_NSTUFERR | \ MCP251XFD_REG_BDIAG1_NFORMERR | MCP251XFD_REG_BDIAG1_NACKERR | \ MCP251XFD_REG_BDIAG1_NBIT1ERR | MCP251XFD_REG_BDIAG1_NBIT0ERR) #define MCP251XFD_REG_BDIAG1_EFMSGCNT_MASK GENMASK(15, 0) #define MCP251XFD_REG_TEFCON 0x40 #define MCP251XFD_REG_TEFCON_FSIZE_MASK GENMASK(28, 24) #define MCP251XFD_REG_TEFCON_FRESET BIT(10) #define MCP251XFD_REG_TEFCON_UINC BIT(8) #define MCP251XFD_REG_TEFCON_TEFTSEN BIT(5) #define MCP251XFD_REG_TEFCON_TEFOVIE BIT(3) #define MCP251XFD_REG_TEFCON_TEFFIE BIT(2) #define MCP251XFD_REG_TEFCON_TEFHIE BIT(1) #define MCP251XFD_REG_TEFCON_TEFNEIE BIT(0) #define MCP251XFD_REG_TEFSTA 0x44 #define MCP251XFD_REG_TEFSTA_TEFOVIF BIT(3) #define MCP251XFD_REG_TEFSTA_TEFFIF BIT(2) #define MCP251XFD_REG_TEFSTA_TEFHIF BIT(1) #define MCP251XFD_REG_TEFSTA_TEFNEIF BIT(0) #define MCP251XFD_REG_TEFUA 0x48 #define MCP251XFD_REG_TXQCON 0x50 #define MCP251XFD_REG_TXQCON_PLSIZE_MASK GENMASK(31, 29) #define MCP251XFD_REG_TXQCON_PLSIZE_8 0 #define MCP251XFD_REG_TXQCON_PLSIZE_12 1 #define MCP251XFD_REG_TXQCON_PLSIZE_16 2 #define MCP251XFD_REG_TXQCON_PLSIZE_20 3 #define MCP251XFD_REG_TXQCON_PLSIZE_24 4 #define MCP251XFD_REG_TXQCON_PLSIZE_32 5 #define MCP251XFD_REG_TXQCON_PLSIZE_48 6 #define MCP251XFD_REG_TXQCON_PLSIZE_64 7 #define MCP251XFD_REG_TXQCON_FSIZE_MASK GENMASK(28, 24) #define MCP251XFD_REG_TXQCON_TXAT_UNLIMITED 3 #define MCP251XFD_REG_TXQCON_TXAT_THREE_SHOT 1 #define MCP251XFD_REG_TXQCON_TXAT_ONE_SHOT 0 #define MCP251XFD_REG_TXQCON_TXAT_MASK GENMASK(22, 21) #define MCP251XFD_REG_TXQCON_TXPRI_MASK GENMASK(20, 16) #define MCP251XFD_REG_TXQCON_FRESET BIT(10) #define MCP251XFD_REG_TXQCON_TXREQ BIT(9) #define MCP251XFD_REG_TXQCON_UINC BIT(8) #define MCP251XFD_REG_TXQCON_TXEN BIT(7) #define MCP251XFD_REG_TXQCON_TXATIE BIT(4) #define MCP251XFD_REG_TXQCON_TXQEIE BIT(2) #define MCP251XFD_REG_TXQCON_TXQNIE BIT(0) #define MCP251XFD_REG_TXQSTA 0x54 #define MCP251XFD_REG_TXQSTA_TXQCI_MASK GENMASK(12, 8) #define MCP251XFD_REG_TXQSTA_TXABT BIT(7) #define MCP251XFD_REG_TXQSTA_TXLARB BIT(6) #define MCP251XFD_REG_TXQSTA_TXERR BIT(5) #define MCP251XFD_REG_TXQSTA_TXATIF BIT(4) #define MCP251XFD_REG_TXQSTA_TXQEIF BIT(2) #define MCP251XFD_REG_TXQSTA_TXQNIF BIT(0) #define MCP251XFD_REG_TXQUA 0x58 #define MCP251XFD_REG_FIFOCON(x) (0x50 + 0xc * (x)) #define MCP251XFD_REG_FIFOCON_PLSIZE_MASK GENMASK(31, 29) #define MCP251XFD_REG_FIFOCON_PLSIZE_8 0 #define MCP251XFD_REG_FIFOCON_PLSIZE_12 1 #define MCP251XFD_REG_FIFOCON_PLSIZE_16 2 #define MCP251XFD_REG_FIFOCON_PLSIZE_20 3 #define MCP251XFD_REG_FIFOCON_PLSIZE_24 4 #define MCP251XFD_REG_FIFOCON_PLSIZE_32 5 #define MCP251XFD_REG_FIFOCON_PLSIZE_48 6 #define MCP251XFD_REG_FIFOCON_PLSIZE_64 7 #define MCP251XFD_REG_FIFOCON_FSIZE_MASK GENMASK(28, 24) #define MCP251XFD_REG_FIFOCON_TXAT_MASK GENMASK(22, 21) #define MCP251XFD_REG_FIFOCON_TXAT_ONE_SHOT 0 #define MCP251XFD_REG_FIFOCON_TXAT_THREE_SHOT 1 #define MCP251XFD_REG_FIFOCON_TXAT_UNLIMITED 3 #define MCP251XFD_REG_FIFOCON_TXPRI_MASK GENMASK(20, 16) #define MCP251XFD_REG_FIFOCON_FRESET BIT(10) #define MCP251XFD_REG_FIFOCON_TXREQ BIT(9) #define MCP251XFD_REG_FIFOCON_UINC BIT(8) #define MCP251XFD_REG_FIFOCON_TXEN BIT(7) #define MCP251XFD_REG_FIFOCON_RTREN BIT(6) #define MCP251XFD_REG_FIFOCON_RXTSEN BIT(5) #define MCP251XFD_REG_FIFOCON_TXATIE BIT(4) #define MCP251XFD_REG_FIFOCON_RXOVIE BIT(3) #define MCP251XFD_REG_FIFOCON_TFERFFIE BIT(2) #define MCP251XFD_REG_FIFOCON_TFHRFHIE BIT(1) #define MCP251XFD_REG_FIFOCON_TFNRFNIE BIT(0) #define MCP251XFD_REG_FIFOSTA(x) (0x54 + 0xc * (x)) #define MCP251XFD_REG_FIFOSTA_FIFOCI_MASK GENMASK(12, 8) #define MCP251XFD_REG_FIFOSTA_TXABT BIT(7) #define MCP251XFD_REG_FIFOSTA_TXLARB BIT(6) #define MCP251XFD_REG_FIFOSTA_TXERR BIT(5) #define MCP251XFD_REG_FIFOSTA_TXATIF BIT(4) #define MCP251XFD_REG_FIFOSTA_RXOVIF BIT(3) #define MCP251XFD_REG_FIFOSTA_TFERFFIF BIT(2) #define MCP251XFD_REG_FIFOSTA_TFHRFHIF BIT(1) #define MCP251XFD_REG_FIFOSTA_TFNRFNIF BIT(0) #define MCP251XFD_REG_FIFOUA(x) (0x58 + 0xc * (x)) #define MCP251XFD_REG_FLTCON(x) (0x1d0 + 0x4 * (x)) #define MCP251XFD_REG_FLTCON_FLTEN3 BIT(31) #define MCP251XFD_REG_FLTCON_F3BP_MASK GENMASK(28, 24) #define MCP251XFD_REG_FLTCON_FLTEN2 BIT(23) #define MCP251XFD_REG_FLTCON_F2BP_MASK GENMASK(20, 16) #define MCP251XFD_REG_FLTCON_FLTEN1 BIT(15) #define MCP251XFD_REG_FLTCON_F1BP_MASK GENMASK(12, 8) #define MCP251XFD_REG_FLTCON_FLTEN0 BIT(7) #define MCP251XFD_REG_FLTCON_F0BP_MASK GENMASK(4, 0) #define MCP251XFD_REG_FLTCON_FLTEN(x) (BIT(7) << 8 * ((x) & 0x3)) #define MCP251XFD_REG_FLTCON_FLT_MASK(x) (GENMASK(7, 0) << (8 * ((x) & 0x3))) #define MCP251XFD_REG_FLTCON_FBP(x, fifo) ((fifo) << 8 * ((x) & 0x3)) #define MCP251XFD_REG_FLTOBJ(x) (0x1f0 + 0x8 * (x)) #define MCP251XFD_REG_FLTOBJ_EXIDE BIT(30) #define MCP251XFD_REG_FLTOBJ_SID11 BIT(29) #define MCP251XFD_REG_FLTOBJ_EID_MASK GENMASK(28, 11) #define MCP251XFD_REG_FLTOBJ_SID_MASK GENMASK(10, 0) #define MCP251XFD_REG_FLTMASK(x) (0x1f4 + 0x8 * (x)) #define MCP251XFD_REG_MASK_MIDE BIT(30) #define MCP251XFD_REG_MASK_MSID11 BIT(29) #define MCP251XFD_REG_MASK_MEID_MASK GENMASK(28, 11) #define MCP251XFD_REG_MASK_MSID_MASK GENMASK(10, 0) /* RAM */ #define MCP251XFD_RAM_START 0x400 #define MCP251XFD_RAM_SIZE SZ_2K /* Message Object */ #define MCP251XFD_OBJ_ID_SID11 BIT(29) #define MCP251XFD_OBJ_ID_EID_MASK GENMASK(28, 11) #define MCP251XFD_OBJ_ID_SID_MASK GENMASK(10, 0) #define MCP251XFD_OBJ_FLAGS_SEQ_MCP2518FD_MASK GENMASK(31, 9) #define MCP251XFD_OBJ_FLAGS_SEQ_MCP2517FD_MASK GENMASK(15, 9) #define MCP251XFD_OBJ_FLAGS_SEQ_MASK MCP251XFD_OBJ_FLAGS_SEQ_MCP2518FD_MASK #define MCP251XFD_OBJ_FLAGS_ESI BIT(8) #define MCP251XFD_OBJ_FLAGS_FDF BIT(7) #define MCP251XFD_OBJ_FLAGS_BRS BIT(6) #define MCP251XFD_OBJ_FLAGS_RTR BIT(5) #define MCP251XFD_OBJ_FLAGS_IDE BIT(4) #define MCP251XFD_OBJ_FLAGS_DLC_MASK GENMASK(3, 0) #define MCP251XFD_REG_FRAME_EFF_SID_MASK GENMASK(28, 18) #define MCP251XFD_REG_FRAME_EFF_EID_MASK GENMASK(17, 0) /* MCP2517/18FD SFR */ #define MCP251XFD_REG_OSC 0xe00 #define MCP251XFD_REG_OSC_SCLKRDY BIT(12) #define MCP251XFD_REG_OSC_OSCRDY BIT(10) #define MCP251XFD_REG_OSC_PLLRDY BIT(8) #define MCP251XFD_REG_OSC_CLKODIV_10 3 #define MCP251XFD_REG_OSC_CLKODIV_4 2 #define MCP251XFD_REG_OSC_CLKODIV_2 1 #define MCP251XFD_REG_OSC_CLKODIV_1 0 #define MCP251XFD_REG_OSC_CLKODIV_MASK GENMASK(6, 5) #define MCP251XFD_REG_OSC_SCLKDIV BIT(4) #define MCP251XFD_REG_OSC_LPMEN BIT(3) /* MCP2518FD only */ #define MCP251XFD_REG_OSC_OSCDIS BIT(2) #define MCP251XFD_REG_OSC_PLLEN BIT(0) #define MCP251XFD_REG_IOCON 0xe04 #define MCP251XFD_REG_IOCON_INTOD BIT(30) #define MCP251XFD_REG_IOCON_SOF BIT(29) #define MCP251XFD_REG_IOCON_TXCANOD BIT(28) #define MCP251XFD_REG_IOCON_PM1 BIT(25) #define MCP251XFD_REG_IOCON_PM0 BIT(24) #define MCP251XFD_REG_IOCON_GPIO1 BIT(17) #define MCP251XFD_REG_IOCON_GPIO0 BIT(16) #define MCP251XFD_REG_IOCON_LAT1 BIT(9) #define MCP251XFD_REG_IOCON_LAT0 BIT(8) #define MCP251XFD_REG_IOCON_XSTBYEN BIT(6) #define MCP251XFD_REG_IOCON_TRIS1 BIT(1) #define MCP251XFD_REG_IOCON_TRIS0 BIT(0) #define MCP251XFD_REG_CRC 0xe08 #define MCP251XFD_REG_CRC_FERRIE BIT(25) #define MCP251XFD_REG_CRC_CRCERRIE BIT(24) #define MCP251XFD_REG_CRC_FERRIF BIT(17) #define MCP251XFD_REG_CRC_CRCERRIF BIT(16) #define MCP251XFD_REG_CRC_IF_MASK GENMASK(17, 16) #define MCP251XFD_REG_CRC_MASK GENMASK(15, 0) #define MCP251XFD_REG_ECCCON 0xe0c #define MCP251XFD_REG_ECCCON_PARITY_MASK GENMASK(14, 8) #define MCP251XFD_REG_ECCCON_DEDIE BIT(2) #define MCP251XFD_REG_ECCCON_SECIE BIT(1) #define MCP251XFD_REG_ECCCON_ECCEN BIT(0) #define MCP251XFD_REG_ECCSTAT 0xe10 #define MCP251XFD_REG_ECCSTAT_ERRADDR_MASK GENMASK(27, 16) #define MCP251XFD_REG_ECCSTAT_IF_MASK GENMASK(2, 1) #define MCP251XFD_REG_ECCSTAT_DEDIF BIT(2) #define MCP251XFD_REG_ECCSTAT_SECIF BIT(1) #define MCP251XFD_REG_DEVID 0xe14 /* MCP2518FD only */ #define MCP251XFD_REG_DEVID_ID_MASK GENMASK(7, 4) #define MCP251XFD_REG_DEVID_REV_MASK GENMASK(3, 0) /* SPI commands */ #define MCP251XFD_SPI_INSTRUCTION_RESET 0x0000 #define MCP251XFD_SPI_INSTRUCTION_WRITE 0x2000 #define MCP251XFD_SPI_INSTRUCTION_READ 0x3000 #define MCP251XFD_SPI_INSTRUCTION_WRITE_CRC 0xa000 #define MCP251XFD_SPI_INSTRUCTION_READ_CRC 0xb000 #define MCP251XFD_SPI_INSTRUCTION_WRITE_CRC_SAFE 0xc000 #define MCP251XFD_SPI_ADDRESS_MASK GENMASK(11, 0) #define MCP251XFD_SYSCLOCK_HZ_MAX 40000000 #define MCP251XFD_SYSCLOCK_HZ_MIN 1000000 #define MCP251XFD_SPICLOCK_HZ_MAX 20000000 #define MCP251XFD_TIMESTAMP_WORK_DELAY_SEC 45 static_assert(MCP251XFD_TIMESTAMP_WORK_DELAY_SEC < CYCLECOUNTER_MASK(32) / MCP251XFD_SYSCLOCK_HZ_MAX / 2); #define MCP251XFD_OSC_PLL_MULTIPLIER 10 #define MCP251XFD_OSC_STAB_SLEEP_US (3 * USEC_PER_MSEC) #define MCP251XFD_OSC_STAB_TIMEOUT_US (10 * MCP251XFD_OSC_STAB_SLEEP_US) #define MCP251XFD_POLL_SLEEP_US (10) #define MCP251XFD_POLL_TIMEOUT_US (USEC_PER_MSEC) /* Misc */ #define MCP251XFD_NAPI_WEIGHT 32 #define MCP251XFD_SOFTRESET_RETRIES_MAX 3 #define MCP251XFD_READ_CRC_RETRIES_MAX 3 #define MCP251XFD_ECC_CNT_MAX 2 #define MCP251XFD_SANITIZE_SPI 1 #define MCP251XFD_SANITIZE_CAN 1 /* FIFO and Ring */ #define MCP251XFD_FIFO_TEF_NUM 1U #define MCP251XFD_FIFO_RX_NUM 3U #define MCP251XFD_FIFO_TX_NUM 1U #define MCP251XFD_FIFO_DEPTH 32U #define MCP251XFD_RX_OBJ_NUM_MIN 16U #define MCP251XFD_RX_OBJ_NUM_MAX (MCP251XFD_FIFO_RX_NUM * MCP251XFD_FIFO_DEPTH) #define MCP251XFD_RX_FIFO_DEPTH_MIN 4U #define MCP251XFD_RX_FIFO_DEPTH_COALESCE_MIN 8U #define MCP251XFD_TX_OBJ_NUM_MIN 2U #define MCP251XFD_TX_OBJ_NUM_MAX 16U #define MCP251XFD_TX_OBJ_NUM_CAN_DEFAULT 8U #define MCP251XFD_TX_OBJ_NUM_CANFD_DEFAULT 4U #define MCP251XFD_TX_FIFO_DEPTH_MIN 2U #define MCP251XFD_TX_FIFO_DEPTH_COALESCE_MIN 2U static_assert(MCP251XFD_FIFO_TEF_NUM == 1U); static_assert(MCP251XFD_FIFO_TEF_NUM == MCP251XFD_FIFO_TX_NUM); static_assert(MCP251XFD_FIFO_RX_NUM <= 4U); /* Silence TX MAB overflow warnings */ #define MCP251XFD_QUIRK_MAB_NO_WARN BIT(0) /* Use CRC to access registers */ #define MCP251XFD_QUIRK_CRC_REG BIT(1) /* Use CRC to access RX/TEF-RAM */ #define MCP251XFD_QUIRK_CRC_RX BIT(2) /* Use CRC to access TX-RAM */ #define MCP251XFD_QUIRK_CRC_TX BIT(3) /* Enable ECC for RAM */ #define MCP251XFD_QUIRK_ECC BIT(4) /* Use Half Duplex SPI transfers */ #define MCP251XFD_QUIRK_HALF_DUPLEX BIT(5) struct mcp251xfd_hw_tef_obj { u32 id; u32 flags; u32 ts; }; /* The tx_obj_raw version is used in spi async, i.e. without * regmap. We have to take care of endianness ourselves. */ struct __packed mcp251xfd_hw_tx_obj_raw { __le32 id; __le32 flags; u8 data[sizeof_field(struct canfd_frame, data)]; }; struct mcp251xfd_hw_tx_obj_can { u32 id; u32 flags; u8 data[sizeof_field(struct can_frame, data)]; }; struct mcp251xfd_hw_tx_obj_canfd { u32 id; u32 flags; u8 data[sizeof_field(struct canfd_frame, data)]; }; struct mcp251xfd_hw_rx_obj_can { u32 id; u32 flags; u32 ts; u8 data[sizeof_field(struct can_frame, data)]; }; struct mcp251xfd_hw_rx_obj_canfd { u32 id; u32 flags; u32 ts; u8 data[sizeof_field(struct canfd_frame, data)]; }; struct __packed mcp251xfd_buf_cmd { __be16 cmd; }; struct __packed mcp251xfd_buf_cmd_crc { __be16 cmd; u8 len; }; union mcp251xfd_tx_obj_load_buf { struct __packed { struct mcp251xfd_buf_cmd cmd; struct mcp251xfd_hw_tx_obj_raw hw_tx_obj; } nocrc; struct __packed { struct mcp251xfd_buf_cmd_crc cmd; struct mcp251xfd_hw_tx_obj_raw hw_tx_obj; __be16 crc; } crc; } ____cacheline_aligned; union mcp251xfd_write_reg_buf { struct __packed { struct mcp251xfd_buf_cmd cmd; u8 data[4]; } nocrc; struct __packed { struct mcp251xfd_buf_cmd_crc cmd; u8 data[4]; __be16 crc; } crc; } ____cacheline_aligned; struct mcp251xfd_tx_obj { struct spi_message msg; struct spi_transfer xfer[2]; union mcp251xfd_tx_obj_load_buf buf; }; struct mcp251xfd_tef_ring { unsigned int head; unsigned int tail; /* u8 obj_num equals tx_ring->obj_num */ /* u8 obj_size equals sizeof(struct mcp251xfd_hw_tef_obj) */ union mcp251xfd_write_reg_buf irq_enable_buf; struct spi_transfer irq_enable_xfer; struct spi_message irq_enable_msg; union mcp251xfd_write_reg_buf uinc_buf; union mcp251xfd_write_reg_buf uinc_irq_disable_buf; struct spi_transfer uinc_xfer[MCP251XFD_TX_OBJ_NUM_MAX]; }; struct mcp251xfd_tx_ring { unsigned int head; unsigned int tail; u16 base; u8 nr; u8 fifo_nr; u8 obj_num; u8 obj_size; struct mcp251xfd_tx_obj obj[MCP251XFD_TX_OBJ_NUM_MAX]; union mcp251xfd_write_reg_buf rts_buf; }; struct mcp251xfd_rx_ring { unsigned int head; unsigned int tail; u16 base; u8 nr; u8 fifo_nr; u8 obj_num; u8 obj_size; union mcp251xfd_write_reg_buf irq_enable_buf; struct spi_transfer irq_enable_xfer; struct spi_message irq_enable_msg; union mcp251xfd_write_reg_buf uinc_buf; union mcp251xfd_write_reg_buf uinc_irq_disable_buf; struct spi_transfer uinc_xfer[MCP251XFD_FIFO_DEPTH]; struct mcp251xfd_hw_rx_obj_canfd obj[]; }; struct __packed mcp251xfd_map_buf_nocrc { struct mcp251xfd_buf_cmd cmd; u8 data[256]; } ____cacheline_aligned; struct __packed mcp251xfd_map_buf_crc { struct mcp251xfd_buf_cmd_crc cmd; u8 data[256 - 4]; __be16 crc; } ____cacheline_aligned; struct mcp251xfd_ecc { u32 ecc_stat; int cnt; }; struct mcp251xfd_regs_status { u32 intf; u32 rxif; }; enum mcp251xfd_model { MCP251XFD_MODEL_MCP2517FD = 0x2517, MCP251XFD_MODEL_MCP2518FD = 0x2518, MCP251XFD_MODEL_MCP251863 = 0x251863, MCP251XFD_MODEL_MCP251XFD = 0xffffffff, /* autodetect model */ }; struct mcp251xfd_devtype_data { enum mcp251xfd_model model; u32 quirks; }; enum mcp251xfd_flags { MCP251XFD_FLAGS_DOWN, MCP251XFD_FLAGS_FD_MODE, __MCP251XFD_FLAGS_SIZE__ }; struct mcp251xfd_priv { struct can_priv can; struct can_rx_offload offload; struct net_device *ndev; struct regmap *map_reg; /* register access */ struct regmap *map_rx; /* RX/TEF RAM access */ struct regmap *map_nocrc; struct mcp251xfd_map_buf_nocrc *map_buf_nocrc_rx; struct mcp251xfd_map_buf_nocrc *map_buf_nocrc_tx; struct regmap *map_crc; struct mcp251xfd_map_buf_crc *map_buf_crc_rx; struct mcp251xfd_map_buf_crc *map_buf_crc_tx; struct spi_device *spi; u32 spi_max_speed_hz_orig; u32 spi_max_speed_hz_fast; u32 spi_max_speed_hz_slow; struct mcp251xfd_tef_ring tef[MCP251XFD_FIFO_TEF_NUM]; struct mcp251xfd_rx_ring *rx[MCP251XFD_FIFO_RX_NUM]; struct mcp251xfd_tx_ring tx[MCP251XFD_FIFO_TX_NUM]; DECLARE_BITMAP(flags, __MCP251XFD_FLAGS_SIZE__); u8 rx_ring_num; u8 rx_obj_num; u8 rx_obj_num_coalesce_irq; u8 tx_obj_num_coalesce_irq; u32 rx_coalesce_usecs_irq; u32 tx_coalesce_usecs_irq; struct hrtimer rx_irq_timer; struct hrtimer tx_irq_timer; struct mcp251xfd_ecc ecc; struct mcp251xfd_regs_status regs_status; struct cyclecounter cc; struct timecounter tc; struct delayed_work timestamp; struct gpio_desc *rx_int; struct clk *clk; bool pll_enable; struct regulator *reg_vdd; struct regulator *reg_xceiver; struct mcp251xfd_devtype_data devtype_data; struct can_berr_counter bec; }; #define MCP251XFD_IS(_model) \ static inline bool \ mcp251xfd_is_##_model(const struct mcp251xfd_priv *priv) \ { \ return priv->devtype_data.model == MCP251XFD_MODEL_MCP##_model; \ } MCP251XFD_IS(2517FD); MCP251XFD_IS(2518FD); MCP251XFD_IS(251863); MCP251XFD_IS(251XFD); static inline bool mcp251xfd_is_fd_mode(const struct mcp251xfd_priv *priv) { /* listen-only mode works like FD mode */ return priv->can.ctrlmode & (CAN_CTRLMODE_LISTENONLY | CAN_CTRLMODE_FD); } static inline u8 mcp251xfd_first_byte_set(u32 mask) { return (mask & 0x0000ffff) ? ((mask & 0x000000ff) ? 0 : 1) : ((mask & 0x00ff0000) ? 2 : 3); } static inline u8 mcp251xfd_last_byte_set(u32 mask) { return (mask & 0xffff0000) ? ((mask & 0xff000000) ? 3 : 2) : ((mask & 0x0000ff00) ? 1 : 0); } static inline __be16 mcp251xfd_cmd_reset(void) { return cpu_to_be16(MCP251XFD_SPI_INSTRUCTION_RESET); } static inline void mcp251xfd_spi_cmd_read_nocrc(struct mcp251xfd_buf_cmd *cmd, u16 addr) { cmd->cmd = cpu_to_be16(MCP251XFD_SPI_INSTRUCTION_READ | addr); } static inline void mcp251xfd_spi_cmd_write_nocrc(struct mcp251xfd_buf_cmd *cmd, u16 addr) { cmd->cmd = cpu_to_be16(MCP251XFD_SPI_INSTRUCTION_WRITE | addr); } static inline bool mcp251xfd_reg_in_ram(unsigned int reg) { static const struct regmap_range range = regmap_reg_range(MCP251XFD_RAM_START, MCP251XFD_RAM_START + MCP251XFD_RAM_SIZE - 4); return regmap_reg_in_range(reg, &range); } static inline void __mcp251xfd_spi_cmd_crc_set_len(struct mcp251xfd_buf_cmd_crc *cmd, u16 len, bool in_ram) { /* Number of u32 for RAM access, number of u8 otherwise. */ if (in_ram) cmd->len = len >> 2; else cmd->len = len; } static inline void mcp251xfd_spi_cmd_crc_set_len_in_ram(struct mcp251xfd_buf_cmd_crc *cmd, u16 len) { __mcp251xfd_spi_cmd_crc_set_len(cmd, len, true); } static inline void mcp251xfd_spi_cmd_crc_set_len_in_reg(struct mcp251xfd_buf_cmd_crc *cmd, u16 len) { __mcp251xfd_spi_cmd_crc_set_len(cmd, len, false); } static inline void mcp251xfd_spi_cmd_read_crc_set_addr(struct mcp251xfd_buf_cmd_crc *cmd, u16 addr) { cmd->cmd = cpu_to_be16(MCP251XFD_SPI_INSTRUCTION_READ_CRC | addr); } static inline void mcp251xfd_spi_cmd_read_crc(struct mcp251xfd_buf_cmd_crc *cmd, u16 addr, u16 len) { mcp251xfd_spi_cmd_read_crc_set_addr(cmd, addr); __mcp251xfd_spi_cmd_crc_set_len(cmd, len, mcp251xfd_reg_in_ram(addr)); } static inline void mcp251xfd_spi_cmd_write_crc_set_addr(struct mcp251xfd_buf_cmd_crc *cmd, u16 addr) { cmd->cmd = cpu_to_be16(MCP251XFD_SPI_INSTRUCTION_WRITE_CRC | addr); } static inline void mcp251xfd_spi_cmd_write_crc(struct mcp251xfd_buf_cmd_crc *cmd, u16 addr, u16 len) { mcp251xfd_spi_cmd_write_crc_set_addr(cmd, addr); __mcp251xfd_spi_cmd_crc_set_len(cmd, len, mcp251xfd_reg_in_ram(addr)); } static inline u8 * mcp251xfd_spi_cmd_write(const struct mcp251xfd_priv *priv, union mcp251xfd_write_reg_buf *write_reg_buf, u16 addr) { u8 *data; if (priv->devtype_data.quirks & MCP251XFD_QUIRK_CRC_REG) { mcp251xfd_spi_cmd_write_crc_set_addr(&write_reg_buf->crc.cmd, addr); data = write_reg_buf->crc.data; } else { mcp251xfd_spi_cmd_write_nocrc(&write_reg_buf->nocrc.cmd, addr); data = write_reg_buf->nocrc.data; } return data; } static inline int mcp251xfd_get_timestamp(const struct mcp251xfd_priv *priv, u32 *timestamp) { return regmap_read(priv->map_reg, MCP251XFD_REG_TBC, timestamp); } static inline u16 mcp251xfd_get_tef_obj_addr(u8 n) { return MCP251XFD_RAM_START + sizeof(struct mcp251xfd_hw_tef_obj) * n; } static inline u16 mcp251xfd_get_tx_obj_addr(const struct mcp251xfd_tx_ring *ring, u8 n) { return ring->base + ring->obj_size * n; } static inline u16 mcp251xfd_get_rx_obj_addr(const struct mcp251xfd_rx_ring *ring, u8 n) { return ring->base + ring->obj_size * n; } static inline int mcp251xfd_tx_tail_get_from_chip(const struct mcp251xfd_priv *priv, u8 *tx_tail) { u32 fifo_sta; int err; err = regmap_read(priv->map_reg, MCP251XFD_REG_FIFOSTA(priv->tx->fifo_nr), &fifo_sta); if (err) return err; *tx_tail = FIELD_GET(MCP251XFD_REG_FIFOSTA_FIFOCI_MASK, fifo_sta); return 0; } static inline u8 mcp251xfd_get_tef_head(const struct mcp251xfd_priv *priv) { return priv->tef->head & (priv->tx->obj_num - 1); } static inline u8 mcp251xfd_get_tef_tail(const struct mcp251xfd_priv *priv) { return priv->tef->tail & (priv->tx->obj_num - 1); } static inline u8 mcp251xfd_get_tef_len(const struct mcp251xfd_priv *priv) { return priv->tef->head - priv->tef->tail; } static inline u8 mcp251xfd_get_tef_linear_len(const struct mcp251xfd_priv *priv) { u8 len; len = mcp251xfd_get_tef_len(priv); return min_t(u8, len, priv->tx->obj_num - mcp251xfd_get_tef_tail(priv)); } static inline u8 mcp251xfd_get_tx_head(const struct mcp251xfd_tx_ring *ring) { return ring->head & (ring->obj_num - 1); } static inline u8 mcp251xfd_get_tx_tail(const struct mcp251xfd_tx_ring *ring) { return ring->tail & (ring->obj_num - 1); } static inline u8 mcp251xfd_get_tx_free(const struct mcp251xfd_tx_ring *ring) { return ring->obj_num - (ring->head - ring->tail); } static inline int mcp251xfd_get_tx_nr_by_addr(const struct mcp251xfd_tx_ring *tx_ring, u8 *nr, u16 addr) { if (addr < mcp251xfd_get_tx_obj_addr(tx_ring, 0) || addr >= mcp251xfd_get_tx_obj_addr(tx_ring, tx_ring->obj_num)) return -ENOENT; *nr = (addr - mcp251xfd_get_tx_obj_addr(tx_ring, 0)) / tx_ring->obj_size; return 0; } static inline u8 mcp251xfd_get_rx_head(const struct mcp251xfd_rx_ring *ring) { return ring->head & (ring->obj_num - 1); } static inline u8 mcp251xfd_get_rx_tail(const struct mcp251xfd_rx_ring *ring) { return ring->tail & (ring->obj_num - 1); } static inline u8 mcp251xfd_get_rx_len(const struct mcp251xfd_rx_ring *ring) { return ring->head - ring->tail; } static inline u8 mcp251xfd_get_rx_linear_len(const struct mcp251xfd_rx_ring *ring) { u8 len; len = mcp251xfd_get_rx_len(ring); return min_t(u8, len, ring->obj_num - mcp251xfd_get_rx_tail(ring)); } #define mcp251xfd_for_each_tx_obj(ring, _obj, n) \ for ((n) = 0, (_obj) = &(ring)->obj[(n)]; \ (n) < (ring)->obj_num; \ (n)++, (_obj) = &(ring)->obj[(n)]) #define mcp251xfd_for_each_rx_ring(priv, ring, n) \ for ((n) = 0, (ring) = *((priv)->rx + (n)); \ (n) < (priv)->rx_ring_num; \ (n)++, (ring) = *((priv)->rx + (n))) int mcp251xfd_chip_fifo_init(const struct mcp251xfd_priv *priv); u16 mcp251xfd_crc16_compute2(const void *cmd, size_t cmd_size, const void *data, size_t data_size); u16 mcp251xfd_crc16_compute(const void *data, size_t data_size); void mcp251xfd_ethtool_init(struct mcp251xfd_priv *priv); int mcp251xfd_regmap_init(struct mcp251xfd_priv *priv); extern const struct can_ram_config mcp251xfd_ram_config; int mcp251xfd_ring_init(struct mcp251xfd_priv *priv); void mcp251xfd_ring_free(struct mcp251xfd_priv *priv); int mcp251xfd_ring_alloc(struct mcp251xfd_priv *priv); int mcp251xfd_handle_rxif(struct mcp251xfd_priv *priv); int mcp251xfd_handle_tefif(struct mcp251xfd_priv *priv); void mcp251xfd_skb_set_timestamp(const struct mcp251xfd_priv *priv, struct sk_buff *skb, u32 timestamp); void mcp251xfd_timestamp_init(struct mcp251xfd_priv *priv); void mcp251xfd_timestamp_stop(struct mcp251xfd_priv *priv); netdev_tx_t mcp251xfd_start_xmit(struct sk_buff *skb, struct net_device *ndev); #if IS_ENABLED(CONFIG_DEV_COREDUMP) void mcp251xfd_dump(const struct mcp251xfd_priv *priv); #else static inline void mcp251xfd_dump(const struct mcp251xfd_priv *priv) { } #endif #endif
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