From 3ed707fde8a33f2b888f75ac2f5e0a98e7774dad Mon Sep 17 00:00:00 2001 From: Biwen Li Date: Tue, 30 Oct 2018 18:26:27 +0800 Subject: [PATCH 26/40] flexcan: support layerscape This is an integrated patch of flexcan for layerscape Signed-off-by: Bhupesh Sharma Signed-off-by: Guanhua Gao Signed-off-by: Pankaj Bansal Signed-off-by: Sakar Arora Signed-off-by: Biwen Li --- drivers/net/can/flexcan.c | 240 ++++++++++++++++++++++---------------- 1 file changed, 138 insertions(+), 102 deletions(-) --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -190,6 +190,7 @@ * MX53 FlexCAN2 03.00.00.00 yes no no no no * MX6s FlexCAN3 10.00.12.00 yes yes no no yes * VF610 FlexCAN3 ? no yes no yes yes? + * LS1021A FlexCAN2 03.00.04.00 no yes no yes * * Some SOCs do not have the RX_WARN & TX_WARN interrupt line connected. */ @@ -279,6 +280,10 @@ struct flexcan_priv { struct clk *clk_per; const struct flexcan_devtype_data *devtype_data; struct regulator *reg_xceiver; + + /* Read and Write APIs */ + u32 (*read)(void __iomem *addr); + void (*write)(u32 val, void __iomem *addr); }; static const struct flexcan_devtype_data fsl_p1010_devtype_data = { @@ -301,6 +306,11 @@ static const struct flexcan_devtype_data FLEXCAN_QUIRK_BROKEN_PERR_STATE, }; +static const struct flexcan_devtype_data fsl_ls1021a_r2_devtype_data = { + .quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS | + FLEXCAN_QUIRK_DISABLE_MECR | FLEXCAN_QUIRK_USE_OFF_TIMESTAMP, +}; + static const struct can_bittiming_const flexcan_bittiming_const = { .name = DRV_NAME, .tseg1_min = 4, @@ -313,39 +323,45 @@ static const struct can_bittiming_const .brp_inc = 1, }; -/* Abstract off the read/write for arm versus ppc. This - * assumes that PPC uses big-endian registers and everything - * else uses little-endian registers, independent of CPU - * endianness. +/* FlexCAN module is essentially modelled as a little-endian IP in most + * SoCs, i.e the registers as well as the message buffer areas are + * implemented in a little-endian fashion. + * + * However there are some SoCs (e.g. LS1021A) which implement the FlexCAN + * module in a big-endian fashion (i.e the registers as well as the + * message buffer areas are implemented in a big-endian way). + * + * In addition, the FlexCAN module can be found on SoCs having ARM or + * PPC cores. So, we need to abstract off the register read/write + * functions, ensuring that these cater to all the combinations of module + * endianness and underlying CPU endianness. */ -#if defined(CONFIG_PPC) -static inline u32 flexcan_read(void __iomem *addr) +static inline u32 flexcan_read_be(void __iomem *addr) { - return in_be32(addr); + return ioread32be(addr); } -static inline void flexcan_write(u32 val, void __iomem *addr) +static inline void flexcan_write_be(u32 val, void __iomem *addr) { - out_be32(addr, val); + iowrite32be(val, addr); } -#else -static inline u32 flexcan_read(void __iomem *addr) + +static inline u32 flexcan_read_le(void __iomem *addr) { - return readl(addr); + return ioread32(addr); } -static inline void flexcan_write(u32 val, void __iomem *addr) +static inline void flexcan_write_le(u32 val, void __iomem *addr) { - writel(val, addr); + iowrite32(val, addr); } -#endif static inline void flexcan_error_irq_enable(const struct flexcan_priv *priv) { struct flexcan_regs __iomem *regs = priv->regs; u32 reg_ctrl = (priv->reg_ctrl_default | FLEXCAN_CTRL_ERR_MSK); - flexcan_write(reg_ctrl, ®s->ctrl); + priv->write(reg_ctrl, ®s->ctrl); } static inline void flexcan_error_irq_disable(const struct flexcan_priv *priv) @@ -353,7 +369,7 @@ static inline void flexcan_error_irq_dis struct flexcan_regs __iomem *regs = priv->regs; u32 reg_ctrl = (priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_MSK); - flexcan_write(reg_ctrl, ®s->ctrl); + priv->write(reg_ctrl, ®s->ctrl); } static inline int flexcan_transceiver_enable(const struct flexcan_priv *priv) @@ -378,14 +394,14 @@ static int flexcan_chip_enable(struct fl unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; u32 reg; - reg = flexcan_read(®s->mcr); + reg = priv->read(®s->mcr); reg &= ~FLEXCAN_MCR_MDIS; - flexcan_write(reg, ®s->mcr); + priv->write(reg, ®s->mcr); - while (timeout-- && (flexcan_read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) + while (timeout-- && (priv->read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) udelay(10); - if (flexcan_read(®s->mcr) & FLEXCAN_MCR_LPM_ACK) + if (priv->read(®s->mcr) & FLEXCAN_MCR_LPM_ACK) return -ETIMEDOUT; return 0; @@ -397,14 +413,14 @@ static int flexcan_chip_disable(struct f unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; u32 reg; - reg = flexcan_read(®s->mcr); + reg = priv->read(®s->mcr); reg |= FLEXCAN_MCR_MDIS; - flexcan_write(reg, ®s->mcr); + priv->write(reg, ®s->mcr); - while (timeout-- && !(flexcan_read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) + while (timeout-- && !(priv->read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) udelay(10); - if (!(flexcan_read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) + if (!(priv->read(®s->mcr) & FLEXCAN_MCR_LPM_ACK)) return -ETIMEDOUT; return 0; @@ -416,14 +432,14 @@ static int flexcan_chip_freeze(struct fl unsigned int timeout = 1000 * 1000 * 10 / priv->can.bittiming.bitrate; u32 reg; - reg = flexcan_read(®s->mcr); + reg = priv->read(®s->mcr); reg |= FLEXCAN_MCR_HALT; - flexcan_write(reg, ®s->mcr); + priv->write(reg, ®s->mcr); - while (timeout-- && !(flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) + while (timeout-- && !(priv->read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) udelay(100); - if (!(flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) + if (!(priv->read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) return -ETIMEDOUT; return 0; @@ -435,14 +451,14 @@ static int flexcan_chip_unfreeze(struct unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; u32 reg; - reg = flexcan_read(®s->mcr); + reg = priv->read(®s->mcr); reg &= ~FLEXCAN_MCR_HALT; - flexcan_write(reg, ®s->mcr); + priv->write(reg, ®s->mcr); - while (timeout-- && (flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) + while (timeout-- && (priv->read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) udelay(10); - if (flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK) + if (priv->read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK) return -ETIMEDOUT; return 0; @@ -453,11 +469,11 @@ static int flexcan_chip_softreset(struct struct flexcan_regs __iomem *regs = priv->regs; unsigned int timeout = FLEXCAN_TIMEOUT_US / 10; - flexcan_write(FLEXCAN_MCR_SOFTRST, ®s->mcr); - while (timeout-- && (flexcan_read(®s->mcr) & FLEXCAN_MCR_SOFTRST)) + priv->write(FLEXCAN_MCR_SOFTRST, ®s->mcr); + while (timeout-- && (priv->read(®s->mcr) & FLEXCAN_MCR_SOFTRST)) udelay(10); - if (flexcan_read(®s->mcr) & FLEXCAN_MCR_SOFTRST) + if (priv->read(®s->mcr) & FLEXCAN_MCR_SOFTRST) return -ETIMEDOUT; return 0; @@ -468,7 +484,7 @@ static int __flexcan_get_berr_counter(co { const struct flexcan_priv *priv = netdev_priv(dev); struct flexcan_regs __iomem *regs = priv->regs; - u32 reg = flexcan_read(®s->ecr); + u32 reg = priv->read(®s->ecr); bec->txerr = (reg >> 0) & 0xff; bec->rxerr = (reg >> 8) & 0xff; @@ -524,24 +540,24 @@ static int flexcan_start_xmit(struct sk_ if (cf->can_dlc > 0) { data = be32_to_cpup((__be32 *)&cf->data[0]); - flexcan_write(data, &priv->tx_mb->data[0]); + priv->write(data, &priv->tx_mb->data[0]); } if (cf->can_dlc > 4) { data = be32_to_cpup((__be32 *)&cf->data[4]); - flexcan_write(data, &priv->tx_mb->data[1]); + priv->write(data, &priv->tx_mb->data[1]); } can_put_echo_skb(skb, dev, 0); - flexcan_write(can_id, &priv->tx_mb->can_id); - flexcan_write(ctrl, &priv->tx_mb->can_ctrl); + priv->write(can_id, &priv->tx_mb->can_id); + priv->write(ctrl, &priv->tx_mb->can_ctrl); /* Errata ERR005829 step8: * Write twice INACTIVE(0x8) code to first MB. */ - flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, + priv->write(FLEXCAN_MB_CODE_TX_INACTIVE, &priv->tx_mb_reserved->can_ctrl); - flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, + priv->write(FLEXCAN_MB_CODE_TX_INACTIVE, &priv->tx_mb_reserved->can_ctrl); return NETDEV_TX_OK; @@ -660,7 +676,7 @@ static unsigned int flexcan_mailbox_read u32 code; do { - reg_ctrl = flexcan_read(&mb->can_ctrl); + reg_ctrl = priv->read(&mb->can_ctrl); } while (reg_ctrl & FLEXCAN_MB_CODE_RX_BUSY_BIT); /* is this MB empty? */ @@ -675,17 +691,17 @@ static unsigned int flexcan_mailbox_read offload->dev->stats.rx_errors++; } } else { - reg_iflag1 = flexcan_read(®s->iflag1); + reg_iflag1 = priv->read(®s->iflag1); if (!(reg_iflag1 & FLEXCAN_IFLAG_RX_FIFO_AVAILABLE)) return 0; - reg_ctrl = flexcan_read(&mb->can_ctrl); + reg_ctrl = priv->read(&mb->can_ctrl); } /* increase timstamp to full 32 bit */ *timestamp = reg_ctrl << 16; - reg_id = flexcan_read(&mb->can_id); + reg_id = priv->read(&mb->can_id); if (reg_ctrl & FLEXCAN_MB_CNT_IDE) cf->can_id = ((reg_id >> 0) & CAN_EFF_MASK) | CAN_EFF_FLAG; else @@ -695,19 +711,19 @@ static unsigned int flexcan_mailbox_read cf->can_id |= CAN_RTR_FLAG; cf->can_dlc = get_can_dlc((reg_ctrl >> 16) & 0xf); - *(__be32 *)(cf->data + 0) = cpu_to_be32(flexcan_read(&mb->data[0])); - *(__be32 *)(cf->data + 4) = cpu_to_be32(flexcan_read(&mb->data[1])); + *(__be32 *)(cf->data + 0) = cpu_to_be32(priv->read(&mb->data[0])); + *(__be32 *)(cf->data + 4) = cpu_to_be32(priv->read(&mb->data[1])); /* mark as read */ if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) { /* Clear IRQ */ if (n < 32) - flexcan_write(BIT(n), ®s->iflag1); + priv->write(BIT(n), ®s->iflag1); else - flexcan_write(BIT(n - 32), ®s->iflag2); + priv->write(BIT(n - 32), ®s->iflag2); } else { - flexcan_write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, ®s->iflag1); - flexcan_read(®s->timer); + priv->write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, ®s->iflag1); + priv->read(®s->timer); } return 1; @@ -719,8 +735,8 @@ static inline u64 flexcan_read_reg_iflag struct flexcan_regs __iomem *regs = priv->regs; u32 iflag1, iflag2; - iflag2 = flexcan_read(®s->iflag2) & priv->reg_imask2_default; - iflag1 = flexcan_read(®s->iflag1) & priv->reg_imask1_default & + iflag2 = priv->read(®s->iflag2) & priv->reg_imask2_default; + iflag1 = priv->read(®s->iflag1) & priv->reg_imask1_default & ~FLEXCAN_IFLAG_MB(priv->tx_mb_idx); return (u64)iflag2 << 32 | iflag1; @@ -736,7 +752,7 @@ static irqreturn_t flexcan_irq(int irq, u32 reg_iflag1, reg_esr; enum can_state last_state = priv->can.state; - reg_iflag1 = flexcan_read(®s->iflag1); + reg_iflag1 = priv->read(®s->iflag1); /* reception interrupt */ if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) { @@ -759,7 +775,8 @@ static irqreturn_t flexcan_irq(int irq, /* FIFO overflow interrupt */ if (reg_iflag1 & FLEXCAN_IFLAG_RX_FIFO_OVERFLOW) { handled = IRQ_HANDLED; - flexcan_write(FLEXCAN_IFLAG_RX_FIFO_OVERFLOW, ®s->iflag1); + priv->write(FLEXCAN_IFLAG_RX_FIFO_OVERFLOW, + ®s->iflag1); dev->stats.rx_over_errors++; dev->stats.rx_errors++; } @@ -773,18 +790,18 @@ static irqreturn_t flexcan_irq(int irq, can_led_event(dev, CAN_LED_EVENT_TX); /* after sending a RTR frame MB is in RX mode */ - flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, - &priv->tx_mb->can_ctrl); - flexcan_write(FLEXCAN_IFLAG_MB(priv->tx_mb_idx), ®s->iflag1); + priv->write(FLEXCAN_MB_CODE_TX_INACTIVE, + &priv->tx_mb->can_ctrl); + priv->write(FLEXCAN_IFLAG_MB(priv->tx_mb_idx), ®s->iflag1); netif_wake_queue(dev); } - reg_esr = flexcan_read(®s->esr); + reg_esr = priv->read(®s->esr); /* ACK all bus error and state change IRQ sources */ if (reg_esr & FLEXCAN_ESR_ALL_INT) { handled = IRQ_HANDLED; - flexcan_write(reg_esr & FLEXCAN_ESR_ALL_INT, ®s->esr); + priv->write(reg_esr & FLEXCAN_ESR_ALL_INT, ®s->esr); } /* state change interrupt or broken error state quirk fix is enabled */ @@ -846,7 +863,7 @@ static void flexcan_set_bittiming(struct struct flexcan_regs __iomem *regs = priv->regs; u32 reg; - reg = flexcan_read(®s->ctrl); + reg = priv->read(®s->ctrl); reg &= ~(FLEXCAN_CTRL_PRESDIV(0xff) | FLEXCAN_CTRL_RJW(0x3) | FLEXCAN_CTRL_PSEG1(0x7) | @@ -870,11 +887,11 @@ static void flexcan_set_bittiming(struct reg |= FLEXCAN_CTRL_SMP; netdev_dbg(dev, "writing ctrl=0x%08x\n", reg); - flexcan_write(reg, ®s->ctrl); + priv->write(reg, ®s->ctrl); /* print chip status */ netdev_dbg(dev, "%s: mcr=0x%08x ctrl=0x%08x\n", __func__, - flexcan_read(®s->mcr), flexcan_read(®s->ctrl)); + priv->read(®s->mcr), priv->read(®s->ctrl)); } /* flexcan_chip_start @@ -913,7 +930,7 @@ static int flexcan_chip_start(struct net * choose format C * set max mailbox number */ - reg_mcr = flexcan_read(®s->mcr); + reg_mcr = priv->read(®s->mcr); reg_mcr &= ~FLEXCAN_MCR_MAXMB(0xff); reg_mcr |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT | FLEXCAN_MCR_SUPV | FLEXCAN_MCR_WRN_EN | FLEXCAN_MCR_SRX_DIS | FLEXCAN_MCR_IRMQ | @@ -927,7 +944,7 @@ static int flexcan_chip_start(struct net FLEXCAN_MCR_MAXMB(priv->tx_mb_idx); } netdev_dbg(dev, "%s: writing mcr=0x%08x", __func__, reg_mcr); - flexcan_write(reg_mcr, ®s->mcr); + priv->write(reg_mcr, ®s->mcr); /* CTRL * @@ -940,7 +957,7 @@ static int flexcan_chip_start(struct net * enable bus off interrupt * (== FLEXCAN_CTRL_ERR_STATE) */ - reg_ctrl = flexcan_read(®s->ctrl); + reg_ctrl = priv->read(®s->ctrl); reg_ctrl &= ~FLEXCAN_CTRL_TSYN; reg_ctrl |= FLEXCAN_CTRL_BOFF_REC | FLEXCAN_CTRL_LBUF | FLEXCAN_CTRL_ERR_STATE; @@ -960,45 +977,45 @@ static int flexcan_chip_start(struct net /* leave interrupts disabled for now */ reg_ctrl &= ~FLEXCAN_CTRL_ERR_ALL; netdev_dbg(dev, "%s: writing ctrl=0x%08x", __func__, reg_ctrl); - flexcan_write(reg_ctrl, ®s->ctrl); + priv->write(reg_ctrl, ®s->ctrl); if ((priv->devtype_data->quirks & FLEXCAN_QUIRK_ENABLE_EACEN_RRS)) { - reg_ctrl2 = flexcan_read(®s->ctrl2); + reg_ctrl2 = priv->read(®s->ctrl2); reg_ctrl2 |= FLEXCAN_CTRL2_EACEN | FLEXCAN_CTRL2_RRS; - flexcan_write(reg_ctrl2, ®s->ctrl2); + priv->write(reg_ctrl2, ®s->ctrl2); } /* clear and invalidate all mailboxes first */ for (i = priv->tx_mb_idx; i < ARRAY_SIZE(regs->mb); i++) { - flexcan_write(FLEXCAN_MB_CODE_RX_INACTIVE, - ®s->mb[i].can_ctrl); + priv->write(FLEXCAN_MB_CODE_RX_INACTIVE, + ®s->mb[i].can_ctrl); } if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) { for (i = priv->offload.mb_first; i <= priv->offload.mb_last; i++) - flexcan_write(FLEXCAN_MB_CODE_RX_EMPTY, - ®s->mb[i].can_ctrl); + priv->write(FLEXCAN_MB_CODE_RX_EMPTY, + ®s->mb[i].can_ctrl); } /* Errata ERR005829: mark first TX mailbox as INACTIVE */ - flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, - &priv->tx_mb_reserved->can_ctrl); + priv->write(FLEXCAN_MB_CODE_TX_INACTIVE, + &priv->tx_mb_reserved->can_ctrl); /* mark TX mailbox as INACTIVE */ - flexcan_write(FLEXCAN_MB_CODE_TX_INACTIVE, - &priv->tx_mb->can_ctrl); + priv->write(FLEXCAN_MB_CODE_TX_INACTIVE, + &priv->tx_mb->can_ctrl); /* acceptance mask/acceptance code (accept everything) */ - flexcan_write(0x0, ®s->rxgmask); - flexcan_write(0x0, ®s->rx14mask); - flexcan_write(0x0, ®s->rx15mask); + priv->write(0x0, ®s->rxgmask); + priv->write(0x0, ®s->rx14mask); + priv->write(0x0, ®s->rx15mask); if (priv->devtype_data->quirks & FLEXCAN_QUIRK_DISABLE_RXFG) - flexcan_write(0x0, ®s->rxfgmask); + priv->write(0x0, ®s->rxfgmask); /* clear acceptance filters */ for (i = 0; i < ARRAY_SIZE(regs->mb); i++) - flexcan_write(0, ®s->rximr[i]); + priv->write(0, ®s->rximr[i]); /* On Vybrid, disable memory error detection interrupts * and freeze mode. @@ -1011,17 +1028,17 @@ static int flexcan_chip_start(struct net * and Correction of Memory Errors" to write to * MECR register */ - reg_ctrl2 = flexcan_read(®s->ctrl2); + reg_ctrl2 = priv->read(®s->ctrl2); reg_ctrl2 |= FLEXCAN_CTRL2_ECRWRE; - flexcan_write(reg_ctrl2, ®s->ctrl2); + priv->write(reg_ctrl2, ®s->ctrl2); - reg_mecr = flexcan_read(®s->mecr); + reg_mecr = priv->read(®s->mecr); reg_mecr &= ~FLEXCAN_MECR_ECRWRDIS; - flexcan_write(reg_mecr, ®s->mecr); + priv->write(reg_mecr, ®s->mecr); reg_mecr |= FLEXCAN_MECR_ECCDIS; reg_mecr &= ~(FLEXCAN_MECR_NCEFAFRZ | FLEXCAN_MECR_HANCEI_MSK | FLEXCAN_MECR_FANCEI_MSK); - flexcan_write(reg_mecr, ®s->mecr); + priv->write(reg_mecr, ®s->mecr); } err = flexcan_transceiver_enable(priv); @@ -1037,14 +1054,14 @@ static int flexcan_chip_start(struct net /* enable interrupts atomically */ disable_irq(dev->irq); - flexcan_write(priv->reg_ctrl_default, ®s->ctrl); - flexcan_write(priv->reg_imask1_default, ®s->imask1); - flexcan_write(priv->reg_imask2_default, ®s->imask2); + priv->write(priv->reg_ctrl_default, ®s->ctrl); + priv->write(priv->reg_imask1_default, ®s->imask1); + priv->write(priv->reg_imask2_default, ®s->imask2); enable_irq(dev->irq); /* print chip status */ netdev_dbg(dev, "%s: reading mcr=0x%08x ctrl=0x%08x\n", __func__, - flexcan_read(®s->mcr), flexcan_read(®s->ctrl)); + priv->read(®s->mcr), priv->read(®s->ctrl)); return 0; @@ -1074,10 +1091,10 @@ static int __flexcan_chip_stop(struct ne goto out_chip_unfreeze; /* Disable all interrupts */ - flexcan_write(0, ®s->imask2); - flexcan_write(0, ®s->imask1); - flexcan_write(priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_ALL, - ®s->ctrl); + priv->write(0, ®s->imask2); + priv->write(0, ®s->imask1); + priv->write(priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_ALL, + ®s->ctrl); flexcan_transceiver_disable(priv); priv->can.state = CAN_STATE_STOPPED; @@ -1209,26 +1226,26 @@ static int register_flexcandev(struct ne err = flexcan_chip_disable(priv); if (err) goto out_disable_per; - reg = flexcan_read(®s->ctrl); + reg = priv->read(®s->ctrl); reg |= FLEXCAN_CTRL_CLK_SRC; - flexcan_write(reg, ®s->ctrl); + priv->write(reg, ®s->ctrl); err = flexcan_chip_enable(priv); if (err) goto out_chip_disable; /* set freeze, halt and activate FIFO, restrict register access */ - reg = flexcan_read(®s->mcr); + reg = priv->read(®s->mcr); reg |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT | FLEXCAN_MCR_FEN | FLEXCAN_MCR_SUPV; - flexcan_write(reg, ®s->mcr); + priv->write(reg, ®s->mcr); /* Currently we only support newer versions of this core * featuring a RX hardware FIFO (although this driver doesn't * make use of it on some cores). Older cores, found on some * Coldfire derivates are not tested. */ - reg = flexcan_read(®s->mcr); + reg = priv->read(®s->mcr); if (!(reg & FLEXCAN_MCR_FEN)) { netdev_err(dev, "Could not enable RX FIFO, unsupported core\n"); err = -ENODEV; @@ -1256,8 +1273,12 @@ static void unregister_flexcandev(struct static const struct of_device_id flexcan_of_match[] = { { .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, }, { .compatible = "fsl,imx28-flexcan", .data = &fsl_imx28_devtype_data, }, + { .compatible = "fsl,imx53-flexcan", .data = &fsl_p1010_devtype_data, }, + { .compatible = "fsl,imx35-flexcan", .data = &fsl_p1010_devtype_data, }, + { .compatible = "fsl,imx25-flexcan", .data = &fsl_p1010_devtype_data, }, { .compatible = "fsl,p1010-flexcan", .data = &fsl_p1010_devtype_data, }, { .compatible = "fsl,vf610-flexcan", .data = &fsl_vf610_devtype_data, }, + { .compatible = "fsl,ls1021ar2-flexcan", .data = &fsl_ls1021a_r2_devtype_data, }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, flexcan_of_match); @@ -1337,6 +1358,21 @@ static int flexcan_probe(struct platform dev->flags |= IFF_ECHO; priv = netdev_priv(dev); + + if (of_property_read_bool(pdev->dev.of_node, "big-endian")) { + priv->read = flexcan_read_be; + priv->write = flexcan_write_be; + } else { + if (of_device_is_compatible(pdev->dev.of_node, + "fsl,p1010-flexcan")) { + priv->read = flexcan_read_be; + priv->write = flexcan_write_be; + } else { + priv->read = flexcan_read_le; + priv->write = flexcan_write_le; + } + } + priv->can.clock.freq = clock_freq; priv->can.bittiming_const = &flexcan_bittiming_const; priv->can.do_set_mode = flexcan_set_mode;