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path: root/drivers/net/can/flexcan.c
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Diffstat (limited to 'drivers/net/can/flexcan.c')
-rw-r--r--drivers/net/can/flexcan.c29
1 files changed, 19 insertions, 10 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index c5f143165f80..c78ecfca1e45 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -144,6 +144,10 @@
#define FLEXCAN_MB_CODE_MASK (0xf0ffffff)
+/* FLEXCAN hardware feature flags */
+#define FLEXCAN_HAS_V10_FEATURES BIT(1) /* For core version >= 10 */
+#define FLEXCAN_HAS_BROKEN_ERR_STATE BIT(2) /* Broken error state handling */
+
/* Structure of the message buffer */
struct flexcan_mb {
u32 can_ctrl;
@@ -178,7 +182,7 @@ struct flexcan_regs {
};
struct flexcan_devtype_data {
- u32 hw_ver; /* hardware controller version */
+ u32 features; /* hardware controller features */
};
struct flexcan_priv {
@@ -197,11 +201,11 @@ struct flexcan_priv {
};
static struct flexcan_devtype_data fsl_p1010_devtype_data = {
- .hw_ver = 3,
+ .features = FLEXCAN_HAS_BROKEN_ERR_STATE,
};
-
+static struct flexcan_devtype_data fsl_imx28_devtype_data;
static struct flexcan_devtype_data fsl_imx6q_devtype_data = {
- .hw_ver = 10,
+ .features = FLEXCAN_HAS_V10_FEATURES | FLEXCAN_HAS_BROKEN_ERR_STATE,
};
static const struct can_bittiming_const flexcan_bittiming_const = {
@@ -741,15 +745,19 @@ static int flexcan_chip_start(struct net_device *dev)
* enable tx and rx warning interrupt
* enable bus off interrupt
* (== FLEXCAN_CTRL_ERR_STATE)
- *
- * _note_: we enable the "error interrupt"
- * (FLEXCAN_CTRL_ERR_MSK), too. Otherwise we don't get any
- * warning or bus passive interrupts.
*/
reg_ctrl = flexcan_read(&regs->ctrl);
reg_ctrl &= ~FLEXCAN_CTRL_TSYN;
reg_ctrl |= FLEXCAN_CTRL_BOFF_REC | FLEXCAN_CTRL_LBUF |
- FLEXCAN_CTRL_ERR_STATE | FLEXCAN_CTRL_ERR_MSK;
+ FLEXCAN_CTRL_ERR_STATE;
+ /*
+ * enable the "error interrupt" (FLEXCAN_CTRL_ERR_MSK),
+ * on most Flexcan cores, too. Otherwise we don't get
+ * any error warning or passive interrupts.
+ */
+ if (priv->devtype_data->features & FLEXCAN_HAS_BROKEN_ERR_STATE ||
+ priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
+ reg_ctrl |= FLEXCAN_CTRL_ERR_MSK;
/* save for later use */
priv->reg_ctrl_default = reg_ctrl;
@@ -772,7 +780,7 @@ static int flexcan_chip_start(struct net_device *dev)
flexcan_write(0x0, &regs->rx14mask);
flexcan_write(0x0, &regs->rx15mask);
- if (priv->devtype_data->hw_ver >= 10)
+ if (priv->devtype_data->features & FLEXCAN_HAS_V10_FEATURES)
flexcan_write(0x0, &regs->rxfgmask);
flexcan_transceiver_switch(priv, 1);
@@ -954,6 +962,7 @@ static void __devexit unregister_flexcandev(struct net_device *dev)
static const struct of_device_id flexcan_of_match[] = {
{ .compatible = "fsl,p1010-flexcan", .data = &fsl_p1010_devtype_data, },
+ { .compatible = "fsl,imx28-flexcan", .data = &fsl_imx28_devtype_data, },
{ .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, },
{ /* sentinel */ },
};