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Diffstat (limited to 'drivers/net/can/flexcan.c')
-rw-r--r--drivers/net/can/flexcan.c241
1 files changed, 139 insertions, 102 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 760d2c07e3a2..634c51e6b8ae 100644
--- 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 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 +306,12 @@ static const struct flexcan_devtype_data fsl_vf610_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_BROKEN_PERR_STATE |
+ FLEXCAN_QUIRK_USE_OFF_TIMESTAMP,
+};
+
static const struct can_bittiming_const flexcan_bittiming_const = {
.name = DRV_NAME,
.tseg1_min = 4,
@@ -313,39 +324,45 @@ static const struct can_bittiming_const flexcan_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, &regs->ctrl);
+ priv->write(reg_ctrl, &regs->ctrl);
}
static inline void flexcan_error_irq_disable(const struct flexcan_priv *priv)
@@ -353,7 +370,7 @@ static inline void flexcan_error_irq_disable(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, &regs->ctrl);
+ priv->write(reg_ctrl, &regs->ctrl);
}
static inline int flexcan_transceiver_enable(const struct flexcan_priv *priv)
@@ -378,14 +395,14 @@ static int flexcan_chip_enable(struct flexcan_priv *priv)
unsigned int timeout = FLEXCAN_TIMEOUT_US / 10;
u32 reg;
- reg = flexcan_read(&regs->mcr);
+ reg = priv->read(&regs->mcr);
reg &= ~FLEXCAN_MCR_MDIS;
- flexcan_write(reg, &regs->mcr);
+ priv->write(reg, &regs->mcr);
- while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
+ while (timeout-- && (priv->read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
udelay(10);
- if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK)
+ if (priv->read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK)
return -ETIMEDOUT;
return 0;
@@ -397,14 +414,14 @@ static int flexcan_chip_disable(struct flexcan_priv *priv)
unsigned int timeout = FLEXCAN_TIMEOUT_US / 10;
u32 reg;
- reg = flexcan_read(&regs->mcr);
+ reg = priv->read(&regs->mcr);
reg |= FLEXCAN_MCR_MDIS;
- flexcan_write(reg, &regs->mcr);
+ priv->write(reg, &regs->mcr);
- while (timeout-- && !(flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
+ while (timeout-- && !(priv->read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
udelay(10);
- if (!(flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
+ if (!(priv->read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
return -ETIMEDOUT;
return 0;
@@ -416,14 +433,14 @@ static int flexcan_chip_freeze(struct flexcan_priv *priv)
unsigned int timeout = 1000 * 1000 * 10 / priv->can.bittiming.bitrate;
u32 reg;
- reg = flexcan_read(&regs->mcr);
+ reg = priv->read(&regs->mcr);
reg |= FLEXCAN_MCR_HALT;
- flexcan_write(reg, &regs->mcr);
+ priv->write(reg, &regs->mcr);
- while (timeout-- && !(flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
+ while (timeout-- && !(priv->read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
udelay(100);
- if (!(flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
+ if (!(priv->read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
return -ETIMEDOUT;
return 0;
@@ -435,14 +452,14 @@ static int flexcan_chip_unfreeze(struct flexcan_priv *priv)
unsigned int timeout = FLEXCAN_TIMEOUT_US / 10;
u32 reg;
- reg = flexcan_read(&regs->mcr);
+ reg = priv->read(&regs->mcr);
reg &= ~FLEXCAN_MCR_HALT;
- flexcan_write(reg, &regs->mcr);
+ priv->write(reg, &regs->mcr);
- while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
+ while (timeout-- && (priv->read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
udelay(10);
- if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK)
+ if (priv->read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK)
return -ETIMEDOUT;
return 0;
@@ -453,11 +470,11 @@ static int flexcan_chip_softreset(struct flexcan_priv *priv)
struct flexcan_regs __iomem *regs = priv->regs;
unsigned int timeout = FLEXCAN_TIMEOUT_US / 10;
- flexcan_write(FLEXCAN_MCR_SOFTRST, &regs->mcr);
- while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_SOFTRST))
+ priv->write(FLEXCAN_MCR_SOFTRST, &regs->mcr);
+ while (timeout-- && (priv->read(&regs->mcr) & FLEXCAN_MCR_SOFTRST))
udelay(10);
- if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_SOFTRST)
+ if (priv->read(&regs->mcr) & FLEXCAN_MCR_SOFTRST)
return -ETIMEDOUT;
return 0;
@@ -468,7 +485,7 @@ static int __flexcan_get_berr_counter(const struct net_device *dev,
{
const struct flexcan_priv *priv = netdev_priv(dev);
struct flexcan_regs __iomem *regs = priv->regs;
- u32 reg = flexcan_read(&regs->ecr);
+ u32 reg = priv->read(&regs->ecr);
bec->txerr = (reg >> 0) & 0xff;
bec->rxerr = (reg >> 8) & 0xff;
@@ -524,24 +541,24 @@ static int flexcan_start_xmit(struct sk_buff *skb, struct net_device *dev)
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 +677,7 @@ static unsigned int flexcan_mailbox_read(struct can_rx_offload *offload,
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 +692,17 @@ static unsigned int flexcan_mailbox_read(struct can_rx_offload *offload,
offload->dev->stats.rx_errors++;
}
} else {
- reg_iflag1 = flexcan_read(&regs->iflag1);
+ reg_iflag1 = priv->read(&regs->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 +712,19 @@ static unsigned int flexcan_mailbox_read(struct can_rx_offload *offload,
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), &regs->iflag1);
+ priv->write(BIT(n), &regs->iflag1);
else
- flexcan_write(BIT(n - 32), &regs->iflag2);
+ priv->write(BIT(n - 32), &regs->iflag2);
} else {
- flexcan_write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, &regs->iflag1);
- flexcan_read(&regs->timer);
+ priv->write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, &regs->iflag1);
+ priv->read(&regs->timer);
}
return 1;
@@ -719,8 +736,8 @@ static inline u64 flexcan_read_reg_iflag_rx(struct flexcan_priv *priv)
struct flexcan_regs __iomem *regs = priv->regs;
u32 iflag1, iflag2;
- iflag2 = flexcan_read(&regs->iflag2) & priv->reg_imask2_default;
- iflag1 = flexcan_read(&regs->iflag1) & priv->reg_imask1_default &
+ iflag2 = priv->read(&regs->iflag2) & priv->reg_imask2_default;
+ iflag1 = priv->read(&regs->iflag1) & priv->reg_imask1_default &
~FLEXCAN_IFLAG_MB(priv->tx_mb_idx);
return (u64)iflag2 << 32 | iflag1;
@@ -736,7 +753,7 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
u32 reg_iflag1, reg_esr;
enum can_state last_state = priv->can.state;
- reg_iflag1 = flexcan_read(&regs->iflag1);
+ reg_iflag1 = priv->read(&regs->iflag1);
/* reception interrupt */
if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
@@ -759,7 +776,8 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
/* FIFO overflow interrupt */
if (reg_iflag1 & FLEXCAN_IFLAG_RX_FIFO_OVERFLOW) {
handled = IRQ_HANDLED;
- flexcan_write(FLEXCAN_IFLAG_RX_FIFO_OVERFLOW, &regs->iflag1);
+ priv->write(FLEXCAN_IFLAG_RX_FIFO_OVERFLOW,
+ &regs->iflag1);
dev->stats.rx_over_errors++;
dev->stats.rx_errors++;
}
@@ -773,18 +791,18 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
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), &regs->iflag1);
+ priv->write(FLEXCAN_MB_CODE_TX_INACTIVE,
+ &priv->tx_mb->can_ctrl);
+ priv->write(FLEXCAN_IFLAG_MB(priv->tx_mb_idx), &regs->iflag1);
netif_wake_queue(dev);
}
- reg_esr = flexcan_read(&regs->esr);
+ reg_esr = priv->read(&regs->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, &regs->esr);
+ priv->write(reg_esr & FLEXCAN_ESR_ALL_INT, &regs->esr);
}
/* state change interrupt or broken error state quirk fix is enabled */
@@ -846,7 +864,7 @@ static void flexcan_set_bittiming(struct net_device *dev)
struct flexcan_regs __iomem *regs = priv->regs;
u32 reg;
- reg = flexcan_read(&regs->ctrl);
+ reg = priv->read(&regs->ctrl);
reg &= ~(FLEXCAN_CTRL_PRESDIV(0xff) |
FLEXCAN_CTRL_RJW(0x3) |
FLEXCAN_CTRL_PSEG1(0x7) |
@@ -870,11 +888,11 @@ static void flexcan_set_bittiming(struct net_device *dev)
reg |= FLEXCAN_CTRL_SMP;
netdev_dbg(dev, "writing ctrl=0x%08x\n", reg);
- flexcan_write(reg, &regs->ctrl);
+ priv->write(reg, &regs->ctrl);
/* print chip status */
netdev_dbg(dev, "%s: mcr=0x%08x ctrl=0x%08x\n", __func__,
- flexcan_read(&regs->mcr), flexcan_read(&regs->ctrl));
+ priv->read(&regs->mcr), priv->read(&regs->ctrl));
}
/* flexcan_chip_start
@@ -913,7 +931,7 @@ static int flexcan_chip_start(struct net_device *dev)
* choose format C
* set max mailbox number
*/
- reg_mcr = flexcan_read(&regs->mcr);
+ reg_mcr = priv->read(&regs->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 +945,7 @@ static int flexcan_chip_start(struct net_device *dev)
FLEXCAN_MCR_MAXMB(priv->tx_mb_idx);
}
netdev_dbg(dev, "%s: writing mcr=0x%08x", __func__, reg_mcr);
- flexcan_write(reg_mcr, &regs->mcr);
+ priv->write(reg_mcr, &regs->mcr);
/* CTRL
*
@@ -940,7 +958,7 @@ static int flexcan_chip_start(struct net_device *dev)
* enable bus off interrupt
* (== FLEXCAN_CTRL_ERR_STATE)
*/
- reg_ctrl = flexcan_read(&regs->ctrl);
+ reg_ctrl = priv->read(&regs->ctrl);
reg_ctrl &= ~FLEXCAN_CTRL_TSYN;
reg_ctrl |= FLEXCAN_CTRL_BOFF_REC | FLEXCAN_CTRL_LBUF |
FLEXCAN_CTRL_ERR_STATE;
@@ -960,45 +978,45 @@ static int flexcan_chip_start(struct net_device *dev)
/* 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, &regs->ctrl);
+ priv->write(reg_ctrl, &regs->ctrl);
if ((priv->devtype_data->quirks & FLEXCAN_QUIRK_ENABLE_EACEN_RRS)) {
- reg_ctrl2 = flexcan_read(&regs->ctrl2);
+ reg_ctrl2 = priv->read(&regs->ctrl2);
reg_ctrl2 |= FLEXCAN_CTRL2_EACEN | FLEXCAN_CTRL2_RRS;
- flexcan_write(reg_ctrl2, &regs->ctrl2);
+ priv->write(reg_ctrl2, &regs->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,
- &regs->mb[i].can_ctrl);
+ priv->write(FLEXCAN_MB_CODE_RX_INACTIVE,
+ &regs->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,
- &regs->mb[i].can_ctrl);
+ priv->write(FLEXCAN_MB_CODE_RX_EMPTY,
+ &regs->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, &regs->rxgmask);
- flexcan_write(0x0, &regs->rx14mask);
- flexcan_write(0x0, &regs->rx15mask);
+ priv->write(0x0, &regs->rxgmask);
+ priv->write(0x0, &regs->rx14mask);
+ priv->write(0x0, &regs->rx15mask);
if (priv->devtype_data->quirks & FLEXCAN_QUIRK_DISABLE_RXFG)
- flexcan_write(0x0, &regs->rxfgmask);
+ priv->write(0x0, &regs->rxfgmask);
/* clear acceptance filters */
for (i = 0; i < ARRAY_SIZE(regs->mb); i++)
- flexcan_write(0, &regs->rximr[i]);
+ priv->write(0, &regs->rximr[i]);
/* On Vybrid, disable memory error detection interrupts
* and freeze mode.
@@ -1011,16 +1029,16 @@ static int flexcan_chip_start(struct net_device *dev)
* and Correction of Memory Errors" to write to
* MECR register
*/
- reg_ctrl2 = flexcan_read(&regs->ctrl2);
+ reg_ctrl2 = priv->read(&regs->ctrl2);
reg_ctrl2 |= FLEXCAN_CTRL2_ECRWRE;
- flexcan_write(reg_ctrl2, &regs->ctrl2);
+ priv->write(reg_ctrl2, &regs->ctrl2);
- reg_mecr = flexcan_read(&regs->mecr);
+ reg_mecr = priv->read(&regs->mecr);
reg_mecr &= ~FLEXCAN_MECR_ECRWRDIS;
- flexcan_write(reg_mecr, &regs->mecr);
+ priv->write(reg_mecr, &regs->mecr);
reg_mecr &= ~(FLEXCAN_MECR_NCEFAFRZ | FLEXCAN_MECR_HANCEI_MSK |
FLEXCAN_MECR_FANCEI_MSK);
- flexcan_write(reg_mecr, &regs->mecr);
+ priv->write(reg_mecr, &regs->mecr);
}
err = flexcan_transceiver_enable(priv);
@@ -1036,14 +1054,14 @@ static int flexcan_chip_start(struct net_device *dev)
/* enable interrupts atomically */
disable_irq(dev->irq);
- flexcan_write(priv->reg_ctrl_default, &regs->ctrl);
- flexcan_write(priv->reg_imask1_default, &regs->imask1);
- flexcan_write(priv->reg_imask2_default, &regs->imask2);
+ priv->write(priv->reg_ctrl_default, &regs->ctrl);
+ priv->write(priv->reg_imask1_default, &regs->imask1);
+ priv->write(priv->reg_imask2_default, &regs->imask2);
enable_irq(dev->irq);
/* print chip status */
netdev_dbg(dev, "%s: reading mcr=0x%08x ctrl=0x%08x\n", __func__,
- flexcan_read(&regs->mcr), flexcan_read(&regs->ctrl));
+ priv->read(&regs->mcr), priv->read(&regs->ctrl));
return 0;
@@ -1068,10 +1086,10 @@ static void flexcan_chip_stop(struct net_device *dev)
flexcan_chip_disable(priv);
/* Disable all interrupts */
- flexcan_write(0, &regs->imask2);
- flexcan_write(0, &regs->imask1);
- flexcan_write(priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_ALL,
- &regs->ctrl);
+ priv->write(0, &regs->imask2);
+ priv->write(0, &regs->imask1);
+ priv->write(priv->reg_ctrl_default & ~FLEXCAN_CTRL_ERR_ALL,
+ &regs->ctrl);
flexcan_transceiver_disable(priv);
priv->can.state = CAN_STATE_STOPPED;
@@ -1186,26 +1204,26 @@ static int register_flexcandev(struct net_device *dev)
err = flexcan_chip_disable(priv);
if (err)
goto out_disable_per;
- reg = flexcan_read(&regs->ctrl);
+ reg = priv->read(&regs->ctrl);
reg |= FLEXCAN_CTRL_CLK_SRC;
- flexcan_write(reg, &regs->ctrl);
+ priv->write(reg, &regs->ctrl);
err = flexcan_chip_enable(priv);
if (err)
goto out_chip_disable;
/* set freeze, halt and activate FIFO, restrict register access */
- reg = flexcan_read(&regs->mcr);
+ reg = priv->read(&regs->mcr);
reg |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT |
FLEXCAN_MCR_FEN | FLEXCAN_MCR_SUPV;
- flexcan_write(reg, &regs->mcr);
+ priv->write(reg, &regs->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(&regs->mcr);
+ reg = priv->read(&regs->mcr);
if (!(reg & FLEXCAN_MCR_FEN)) {
netdev_err(dev, "Could not enable RX FIFO, unsupported core\n");
err = -ENODEV;
@@ -1233,8 +1251,12 @@ static void unregister_flexcandev(struct net_device *dev)
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);
@@ -1314,6 +1336,21 @@ static int flexcan_probe(struct platform_device *pdev)
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;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.