/* SPDX-License-Identifier: GPL-2.0 * flexcan.c - FLEXCAN CAN controller driver * * Copyright (c) 2005-2006 Varma Electronics Oy * Copyright (c) 2009 Sascha Hauer, Pengutronix * Copyright (c) 2010-2017 Pengutronix, Marc Kleine-Budde * Copyright (c) 2014 David Jander, Protonic Holland * Copyright (C) 2022 Amarula Solutions, Dario Binacchi * * Based on code originally by Andrey Volkov * */ #ifndef _FLEXCAN_H #define _FLEXCAN_H #include /* FLEXCAN hardware feature flags * * Below is some version info we got: * SOC Version IP-Version Glitch- [TR]WRN_INT IRQ Err Memory err RTR rece- FD Mode MB * Filter? connected? Passive detection ption in MB Supported? * MCF5441X FlexCAN2 ? no yes no no no no 16 * MX25 FlexCAN2 03.00.00.00 no no no no no no 64 * MX28 FlexCAN2 03.00.04.00 yes yes no no no no 64 * MX35 FlexCAN2 03.00.00.00 no no no no no no 64 * MX53 FlexCAN2 03.00.00.00 yes no no no no no 64 * MX6s FlexCAN3 10.00.12.00 yes yes no no yes no 64 * MX8QM FlexCAN3 03.00.23.00 yes yes no no yes yes 64 * MX8MP FlexCAN3 03.00.17.01 yes yes no yes yes yes 64 * VF610 FlexCAN3 ? no yes no yes yes? no 64 * LS1021A FlexCAN2 03.00.04.00 no yes no no yes no 64 * LX2160A FlexCAN3 03.00.23.00 no yes no yes yes yes 64 * * Some SOCs do not have the RX_WARN & TX_WARN interrupt line connected. */ /* [TR]WRN_INT not connected */ #define FLEXCAN_QUIRK_BROKEN_WERR_STATE BIT(1) /* Disable RX FIFO Global mask */ #define FLEXCAN_QUIRK_DISABLE_RXFG BIT(2) /* Enable EACEN and RRS bit in ctrl2 */ #define FLEXCAN_QUIRK_ENABLE_EACEN_RRS BIT(3) /* Disable non-correctable errors interrupt and freeze mode */ #define FLEXCAN_QUIRK_DISABLE_MECR BIT(4) /* Use mailboxes (not FIFO) for RX path */ #define FLEXCAN_QUIRK_USE_RX_MAILBOX BIT(5) /* No interrupt for error passive */ #define FLEXCAN_QUIRK_BROKEN_PERR_STATE BIT(6) /* default to BE register access */ #define FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN BIT(7) /* Setup stop mode with GPR to support wakeup */ #define FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR BIT(8) /* Support CAN-FD mode */ #define FLEXCAN_QUIRK_SUPPORT_FD BIT(9) /* support memory detection and correction */ #define FLEXCAN_QUIRK_SUPPORT_ECC BIT(10) /* Setup stop mode with SCU firmware to support wakeup */ #define FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW BIT(11) /* Setup 3 separate interrupts, main, boff and err */ #define FLEXCAN_QUIRK_NR_IRQ_3 BIT(12) /* Setup 16 mailboxes */ #define FLEXCAN_QUIRK_NR_MB_16 BIT(13) /* Device supports RX via mailboxes */ #define FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX BIT(14) /* Device supports RTR reception via mailboxes */ #define FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR BIT(15) /* Device supports RX via FIFO */ #define FLEXCAN_QUIRK_SUPPPORT_RX_FIFO BIT(16) struct flexcan_devtype_data { u32 quirks; /* quirks needed for different IP cores */ }; struct flexcan_stop_mode { struct regmap *gpr; u8 req_gpr; u8 req_bit; }; struct flexcan_priv { struct can_priv can; struct can_rx_offload offload; struct device *dev; struct flexcan_regs __iomem *regs; struct flexcan_mb __iomem *tx_mb; struct flexcan_mb __iomem *tx_mb_reserved; u8 tx_mb_idx; u8 mb_count; u8 mb_size; u8 clk_src; /* clock source of CAN Protocol Engine */ u8 scu_idx; u64 rx_mask; u64 tx_mask; u32 reg_ctrl_default; struct clk *clk_ipg; struct clk *clk_per; struct flexcan_devtype_data devtype_data; struct regulator *reg_xceiver; struct flexcan_stop_mode stm; int irq_boff; int irq_err; /* IPC handle when setup stop mode by System Controller firmware(scfw) */ struct imx_sc_ipc *sc_ipc_handle; /* Read and Write APIs */ u32 (*read)(void __iomem *addr); void (*write)(u32 val, void __iomem *addr); }; extern const struct ethtool_ops flexcan_ethtool_ops; static inline bool flexcan_supports_rx_mailbox(const struct flexcan_priv *priv) { const u32 quirks = priv->devtype_data.quirks; return quirks & FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX; } static inline bool flexcan_supports_rx_mailbox_rtr(const struct flexcan_priv *priv) { const u32 quirks = priv->devtype_data.quirks; return (quirks & (FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR)) == (FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX | FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR); } static inline bool flexcan_supports_rx_fifo(const struct flexcan_priv *priv) { const u32 quirks = priv->devtype_data.quirks; return quirks & FLEXCAN_QUIRK_SUPPPORT_RX_FIFO; } static inline bool flexcan_active_rx_rtr(const struct flexcan_priv *priv) { const u32 quirks = priv->devtype_data.quirks; if (quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX) { if (quirks & FLEXCAN_QUIRK_SUPPPORT_RX_MAILBOX_RTR) return true; } else { /* RX-FIFO is always RTR capable */ return true; } return false; } #endif /* _FLEXCAN_H */