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The LAN743x Ethernet controller provides two independent PTP event channels. Each one can be used to generate a periodic output from the PTP clock. The output can be routed to any one of the available GPIO pins on the device. The PTP clock API can now be used to: - select any LAN743x GPIO pin to function as a periodic output - select either LAN743x PTP event channel to generate the output The LAN7430 has 4 GPIO pins that are multiplexed with its internal PHY LED control signals. A pin assigned to the LED control function will be assigned to the GPIO function if selected for PTP periodic output. Signed-off-by: John Efstathiades <john.efstathiades@pebblebay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/* Copyright (C) 2018 Microchip Technology Inc. */
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#ifndef _LAN743X_PTP_H
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#define _LAN743X_PTP_H
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#include "linux/ptp_clock_kernel.h"
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#include "linux/netdevice.h"
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#define LAN7430_N_LED 4
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#define LAN7430_N_GPIO 4 /* multiplexed with PHY LEDs */
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#define LAN7431_N_GPIO 12
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#define LAN743X_PTP_N_GPIO LAN7431_N_GPIO
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/* the number of periodic outputs is limited by number of
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* PTP clock event channels
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*/
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#define LAN743X_PTP_N_EVENT_CHAN 2
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#define LAN743X_PTP_N_PEROUT LAN743X_PTP_N_EVENT_CHAN
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struct lan743x_adapter;
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/* GPIO */
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struct lan743x_gpio {
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/* gpio_lock: used to prevent concurrent access to gpio settings */
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spinlock_t gpio_lock;
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int used_bits;
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int output_bits;
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int ptp_bits;
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u32 gpio_cfg0;
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u32 gpio_cfg1;
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u32 gpio_cfg2;
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u32 gpio_cfg3;
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};
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int lan743x_gpio_init(struct lan743x_adapter *adapter);
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void lan743x_ptp_isr(void *context);
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bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter);
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void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter);
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void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
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struct sk_buff *skb, bool ignore_sync);
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int lan743x_ptp_init(struct lan743x_adapter *adapter);
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int lan743x_ptp_open(struct lan743x_adapter *adapter);
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void lan743x_ptp_close(struct lan743x_adapter *adapter);
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void lan743x_ptp_update_latency(struct lan743x_adapter *adapter,
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u32 link_speed);
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int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
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#define LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS (4)
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#define PTP_FLAG_PTP_CLOCK_REGISTERED BIT(1)
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#define PTP_FLAG_ISR_ENABLED BIT(2)
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struct lan743x_ptp_perout {
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int event_ch; /* PTP event channel (0=channel A, 1=channel B) */
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int gpio_pin; /* GPIO pin where output appears */
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};
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struct lan743x_ptp {
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int flags;
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/* command_lock: used to prevent concurrent ptp commands */
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struct mutex command_lock;
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struct ptp_clock *ptp_clock;
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struct ptp_clock_info ptp_clock_info;
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struct ptp_pin_desc pin_config[LAN743X_PTP_N_GPIO];
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unsigned long used_event_ch;
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struct lan743x_ptp_perout perout[LAN743X_PTP_N_PEROUT];
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bool leds_multiplexed;
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bool led_enabled[LAN7430_N_LED];
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/* tx_ts_lock: used to prevent concurrent access to timestamp arrays */
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spinlock_t tx_ts_lock;
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int pending_tx_timestamps;
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struct sk_buff *tx_ts_skb_queue[LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
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unsigned int tx_ts_ignore_sync_queue;
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int tx_ts_skb_queue_size;
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u32 tx_ts_seconds_queue[LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
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u32 tx_ts_nseconds_queue[LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
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u32 tx_ts_header_queue[LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
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int tx_ts_queue_size;
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};
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#endif /* _LAN743X_PTP_H */
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