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can: kvaser_pciefd: Add support to control CAN LEDs on device

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Add support to turn on/off CAN LEDs on device.
Turn off all CAN LEDs in probe, since they are default on after a reset or
power on.

Reviewed-by: Axel Forsman <axfo@kvaser.com>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Link: https://patch.msgid.link/20250725123230.8-2-extja@kvaser.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Jimmy Assarsson 2025-07-25 14:32:21 +02:00 committed by Marc Kleine-Budde
parent 2db7a52ca9
commit 44f0b630f6
1 changed files with 18 additions and 0 deletions
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18
drivers/net/can/kvaser_pciefd.c
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@ -66,6 +66,7 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
#define KVASER_PCIEFD_KCAN_FIFO_LAST_REG 0x180
#define KVASER_PCIEFD_KCAN_CTRL_REG 0x2c0
#define KVASER_PCIEFD_KCAN_CMD_REG 0x400
#define KVASER_PCIEFD_KCAN_IOC_REG 0x404
#define KVASER_PCIEFD_KCAN_IEN_REG 0x408
#define KVASER_PCIEFD_KCAN_IRQ_REG 0x410
#define KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG 0x414
@ -136,6 +137,9 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
/* Request status packet */
#define KVASER_PCIEFD_KCAN_CMD_SRQ BIT(0)
/* Control CAN LED, active low */
#define KVASER_PCIEFD_KCAN_IOC_LED BIT(0)
/* Transmitter unaligned */
#define KVASER_PCIEFD_KCAN_IRQ_TAL BIT(17)
/* Tx FIFO empty */
@ -410,6 +414,7 @@ struct kvaser_pciefd_can {
struct kvaser_pciefd *kv_pcie;
void __iomem *reg_base;
struct can_berr_counter bec;
u32 ioc;
u8 cmd_seq;
u8 tx_max_count;
u8 tx_idx;
@ -528,6 +533,16 @@ static inline void kvaser_pciefd_abort_flush_reset(struct kvaser_pciefd_can *can
kvaser_pciefd_send_kcan_cmd(can, KVASER_PCIEFD_KCAN_CMD_AT);
}
static inline void kvaser_pciefd_set_led(struct kvaser_pciefd_can *can, bool on)
{
if (on)
can->ioc &= ~KVASER_PCIEFD_KCAN_IOC_LED;
else
can->ioc |= KVASER_PCIEFD_KCAN_IOC_LED;
iowrite32(can->ioc, can->reg_base + KVASER_PCIEFD_KCAN_IOC_REG);
}
static void kvaser_pciefd_enable_err_gen(struct kvaser_pciefd_can *can)
{
u32 mode;
@ -990,6 +1005,9 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)
/* Disable Bus load reporting */
iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_BUS_LOAD_REG);
can->ioc = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_IOC_REG);
kvaser_pciefd_set_led(can, false);
tx_nr_packets_max =
FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_MAX_MASK,
ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG));