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net: dsa: mv88e6xxx: Add mv88e6390 watchdog interrupt support 

Implement the ops needed to support the watchdog for the MV88E6390
family.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2017-02-09 00:03:43 +01:00 committed by David S. Miller
parent fcd25166d9
commit 6130373663
4 changed files with 71 additions and 0 deletions
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9
drivers/net/dsa/mv88e6xxx/chip.c
View File

@ -3419,6 +3419,7 @@ static const struct mv88e6xxx_ops mv88e6190_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
@ -3446,6 +3447,7 @@ static const struct mv88e6xxx_ops mv88e6190x_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
@ -3473,6 +3475,7 @@ static const struct mv88e6xxx_ops mv88e6191_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
@ -3530,6 +3533,7 @@ static const struct mv88e6xxx_ops mv88e6290_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
@ -3694,6 +3698,7 @@ static const struct mv88e6xxx_ops mv88e6141_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
@ -3722,6 +3727,7 @@ static const struct mv88e6xxx_ops mv88e6341_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
@ -3752,6 +3758,7 @@ static const struct mv88e6xxx_ops mv88e6390_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
@ -3781,6 +3788,7 @@ static const struct mv88e6xxx_ops mv88e6390x_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};
@ -3808,6 +3816,7 @@ static const struct mv88e6xxx_ops mv88e6391_ops = {
.stats_get_stats = mv88e6390_stats_get_stats,
.g1_set_cpu_port = mv88e6390_g1_set_cpu_port,
.g1_set_egress_port = mv88e6390_g1_set_egress_port,
.watchdog_ops = &mv88e6390_watchdog_ops,
.mgmt_rsvd2cpu = mv88e6390_g1_mgmt_rsvd2cpu,
.reset = mv88e6352_g1_reset,
};

48
drivers/net/dsa/mv88e6xxx/global2.c
View File

@ -686,6 +686,54 @@ const struct mv88e6xxx_irq_ops mv88e6097_watchdog_ops = {
.irq_free = mv88e6097_watchdog_free,
};
static int mv88e6390_watchdog_setup(struct mv88e6xxx_chip *chip)
{
return mv88e6xxx_g2_update(chip, GLOBAL2_WDOG_CONTROL,
GLOBAL2_WDOG_INT_ENABLE |
GLOBAL2_WDOG_CUT_THROUGH |
GLOBAL2_WDOG_QUEUE_CONTROLLER |
GLOBAL2_WDOG_EGRESS |
GLOBAL2_WDOG_FORCE_IRQ);
}
static int mv88e6390_watchdog_action(struct mv88e6xxx_chip *chip, int irq)
{
int err;
u16 reg;
mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, GLOBAL2_WDOG_EVENT);
err = mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, &reg);
dev_info(chip->dev, "Watchdog event: 0x%04x",
reg & GLOBAL2_WDOG_DATA_MASK);
mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, GLOBAL2_WDOG_HISTORY);
err = mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, &reg);
dev_info(chip->dev, "Watchdog history: 0x%04x",
reg & GLOBAL2_WDOG_DATA_MASK);
/* Trigger a software reset to try to recover the switch */
if (chip->info->ops->reset)
chip->info->ops->reset(chip);
mv88e6390_watchdog_setup(chip);
return IRQ_HANDLED;
}
static void mv88e6390_watchdog_free(struct mv88e6xxx_chip *chip)
{
mv88e6xxx_g2_update(chip, GLOBAL2_WDOG_CONTROL,
GLOBAL2_WDOG_INT_ENABLE);
}
const struct mv88e6xxx_irq_ops mv88e6390_watchdog_ops = {
.irq_action = mv88e6390_watchdog_action,
.irq_setup = mv88e6390_watchdog_setup,
.irq_free = mv88e6390_watchdog_free,
};
static irqreturn_t mv88e6xxx_g2_watchdog_thread_fn(int irq, void *dev_id)
{
struct mv88e6xxx_chip *chip = dev_id;

2
drivers/net/dsa/mv88e6xxx/global2.h
View File

@ -47,6 +47,7 @@ void mv88e6xxx_g2_irq_free(struct mv88e6xxx_chip *chip);
int mv88e6095_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip);
extern const struct mv88e6xxx_irq_ops mv88e6097_watchdog_ops;
extern const struct mv88e6xxx_irq_ops mv88e6390_watchdog_ops;
#else /* !CONFIG_NET_DSA_MV88E6XXX_GLOBAL2 */
@ -128,6 +129,7 @@ static inline int mv88e6095_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip)
}
static const struct mv88e6xxx_irq_ops mv88e6097_watchdog_ops = {};
static const struct mv88e6xxx_irq_ops mv88e6390_watchdog_ops = {};
#endif /* CONFIG_NET_DSA_MV88E6XXX_GLOBAL2 */

12
drivers/net/dsa/mv88e6xxx/mv88e6xxx.h
View File

@ -424,6 +424,17 @@
#define GLOBAL2_WDOG_CONTROL_FORCE_IRQ BIT(2)
#define GLOBAL2_WDOG_CONTROL_HISTORY BIT(1)
#define GLOBAL2_WDOG_CONTROL_SWRESET BIT(0)
#define GLOBAL2_WDOG_UPDATE BIT(15)
#define GLOBAL2_WDOG_INT_SOURCE (0x00 << 8)
#define GLOBAL2_WDOG_INT_STATUS (0x10 << 8)
#define GLOBAL2_WDOG_INT_ENABLE (0x11 << 8)
#define GLOBAL2_WDOG_EVENT (0x12 << 8)
#define GLOBAL2_WDOG_HISTORY (0x13 << 8)
#define GLOBAL2_WDOG_DATA_MASK 0xff
#define GLOBAL2_WDOG_CUT_THROUGH BIT(3)
#define GLOBAL2_WDOG_QUEUE_CONTROLLER BIT(2)
#define GLOBAL2_WDOG_EGRESS BIT(1)
#define GLOBAL2_WDOG_FORCE_IRQ BIT(0)
#define GLOBAL2_QOS_WEIGHT 0x1c
#define GLOBAL2_MISC 0x1d
@ -675,6 +686,7 @@ enum mv88e6xxx_cap {
#define MV88E6XXX_FLAGS_FAMILY_6390 \
(MV88E6XXX_FLAG_EEE | \
MV88E6XXX_FLAG_GLOBAL2 | \
MV88E6XXX_FLAG_G2_INT | \
MV88E6XXX_FLAG_STU | \
MV88E6XXX_FLAG_VTU | \
MV88E6XXX_FLAGS_IRL | \