diff options
Diffstat (limited to 'drivers/net/ethernet/microchip/lan743x_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/microchip/lan743x_ptp.c | 1160 |
1 files changed, 1160 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/lan743x_ptp.c b/drivers/net/ethernet/microchip/lan743x_ptp.c new file mode 100644 index 000000000000..64dba96edc79 --- /dev/null +++ b/drivers/net/ethernet/microchip/lan743x_ptp.c @@ -0,0 +1,1160 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* Copyright (C) 2018 Microchip Technology Inc. */ + +#include <linux/netdevice.h> +#include "lan743x_main.h" + +#include <linux/ptp_clock_kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/net_tstamp.h> + +#include "lan743x_ptp.h" + +#define LAN743X_NUMBER_OF_GPIO (12) +#define LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB (31249999) +#define LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM (2047999934) + +static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter); +static void lan743x_ptp_enable(struct lan743x_adapter *adapter); +static void lan743x_ptp_disable(struct lan743x_adapter *adapter); +static void lan743x_ptp_reset(struct lan743x_adapter *adapter); +static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter, + u32 seconds, u32 nano_seconds, + u32 sub_nano_seconds); + +int lan743x_gpio_init(struct lan743x_adapter *adapter) +{ + struct lan743x_gpio *gpio = &adapter->gpio; + + spin_lock_init(&gpio->gpio_lock); + + gpio->gpio_cfg0 = 0; /* set all direction to input, data = 0 */ + gpio->gpio_cfg1 = 0x0FFF0000;/* disable all gpio, set to open drain */ + gpio->gpio_cfg2 = 0;/* set all to 1588 low polarity level */ + gpio->gpio_cfg3 = 0;/* disable all 1588 output */ + lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0); + lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1); + lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2); + lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3); + + return 0; +} + +static void lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter *adapter, + u32 bit_mask) +{ + int timeout = 1000; + u32 data = 0; + + while (timeout && + (data = (lan743x_csr_read(adapter, PTP_CMD_CTL) & + bit_mask))) { + usleep_range(1000, 20000); + timeout--; + } + if (data) { + netif_err(adapter, drv, adapter->netdev, + "timeout waiting for cmd to be done, cmd = 0x%08X\n", + bit_mask); + } +} + +static void lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter *adapter, + u32 seconds, u32 nano_seconds, + u32 header) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + spin_lock_bh(&ptp->tx_ts_lock); + if (ptp->tx_ts_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) { + ptp->tx_ts_seconds_queue[ptp->tx_ts_queue_size] = seconds; + ptp->tx_ts_nseconds_queue[ptp->tx_ts_queue_size] = nano_seconds; + ptp->tx_ts_header_queue[ptp->tx_ts_queue_size] = header; + ptp->tx_ts_queue_size++; + } else { + netif_err(adapter, drv, adapter->netdev, + "tx ts queue overflow\n"); + } + spin_unlock_bh(&ptp->tx_ts_lock); +} + +static void lan743x_ptp_tx_ts_complete(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + struct skb_shared_hwtstamps tstamps; + u32 header, nseconds, seconds; + bool ignore_sync = false; + struct sk_buff *skb; + int c, i; + + spin_lock_bh(&ptp->tx_ts_lock); + c = ptp->tx_ts_skb_queue_size; + + if (c > ptp->tx_ts_queue_size) + c = ptp->tx_ts_queue_size; + if (c <= 0) + goto done; + + for (i = 0; i < c; i++) { + ignore_sync = ((ptp->tx_ts_ignore_sync_queue & + BIT(i)) != 0); + skb = ptp->tx_ts_skb_queue[i]; + nseconds = ptp->tx_ts_nseconds_queue[i]; + seconds = ptp->tx_ts_seconds_queue[i]; + header = ptp->tx_ts_header_queue[i]; + + memset(&tstamps, 0, sizeof(tstamps)); + tstamps.hwtstamp = ktime_set(seconds, nseconds); + if (!ignore_sync || + ((header & PTP_TX_MSG_HEADER_MSG_TYPE_) != + PTP_TX_MSG_HEADER_MSG_TYPE_SYNC_)) + skb_tstamp_tx(skb, &tstamps); + + dev_kfree_skb(skb); + + ptp->tx_ts_skb_queue[i] = NULL; + ptp->tx_ts_seconds_queue[i] = 0; + ptp->tx_ts_nseconds_queue[i] = 0; + ptp->tx_ts_header_queue[i] = 0; + } + + /* shift queue */ + ptp->tx_ts_ignore_sync_queue >>= c; + for (i = c; i < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS; i++) { + ptp->tx_ts_skb_queue[i - c] = ptp->tx_ts_skb_queue[i]; + ptp->tx_ts_seconds_queue[i - c] = ptp->tx_ts_seconds_queue[i]; + ptp->tx_ts_nseconds_queue[i - c] = ptp->tx_ts_nseconds_queue[i]; + ptp->tx_ts_header_queue[i - c] = ptp->tx_ts_header_queue[i]; + + ptp->tx_ts_skb_queue[i] = NULL; + ptp->tx_ts_seconds_queue[i] = 0; + ptp->tx_ts_nseconds_queue[i] = 0; + ptp->tx_ts_header_queue[i] = 0; + } + ptp->tx_ts_skb_queue_size -= c; + ptp->tx_ts_queue_size -= c; +done: + ptp->pending_tx_timestamps -= c; + spin_unlock_bh(&ptp->tx_ts_lock); +} + +static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + int result = -ENODEV; + int index = 0; + + mutex_lock(&ptp->command_lock); + for (index = 0; index < LAN743X_PTP_NUMBER_OF_EVENT_CHANNELS; index++) { + if (!(test_bit(index, &ptp->used_event_ch))) { + ptp->used_event_ch |= BIT(index); + result = index; + break; + } + } + mutex_unlock(&ptp->command_lock); + return result; +} + +static void lan743x_ptp_release_event_ch(struct lan743x_adapter *adapter, + int event_channel) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + mutex_lock(&ptp->command_lock); + if (test_bit(event_channel, &ptp->used_event_ch)) { + ptp->used_event_ch &= ~BIT(event_channel); + } else { + netif_warn(adapter, drv, adapter->netdev, + "attempted release on a not used event_channel = %d\n", + event_channel); + } + mutex_unlock(&ptp->command_lock); +} + +static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter, + u32 *seconds, u32 *nano_seconds, + u32 *sub_nano_seconds); +static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter, + s64 time_step_ns); + +static int lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter *adapter, + int bit, int ptp_channel) +{ + struct lan743x_gpio *gpio = &adapter->gpio; + unsigned long irq_flags = 0; + int bit_mask = BIT(bit); + int ret = -EBUSY; + + spin_lock_irqsave(&gpio->gpio_lock, irq_flags); + + if (!(gpio->used_bits & bit_mask)) { + gpio->used_bits |= bit_mask; + gpio->output_bits |= bit_mask; + gpio->ptp_bits |= bit_mask; + + /* set as output, and zero initial value */ + gpio->gpio_cfg0 |= GPIO_CFG0_GPIO_DIR_BIT_(bit); + gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(bit); + lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0); + + /* enable gpio, and set buffer type to push pull */ + gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOEN_BIT_(bit); + gpio->gpio_cfg1 |= GPIO_CFG1_GPIOBUF_BIT_(bit); + lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1); + + /* set 1588 polarity to high */ + gpio->gpio_cfg2 |= GPIO_CFG2_1588_POL_BIT_(bit); + lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2); + + if (!ptp_channel) { + /* use channel A */ + gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_CH_SEL_BIT_(bit); + } else { + /* use channel B */ + gpio->gpio_cfg3 |= GPIO_CFG3_1588_CH_SEL_BIT_(bit); + } + gpio->gpio_cfg3 |= GPIO_CFG3_1588_OE_BIT_(bit); + lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3); + + ret = bit; + } + spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags); + return ret; +} + +static void lan743x_gpio_release(struct lan743x_adapter *adapter, int bit) +{ + struct lan743x_gpio *gpio = &adapter->gpio; + unsigned long irq_flags = 0; + int bit_mask = BIT(bit); + + spin_lock_irqsave(&gpio->gpio_lock, irq_flags); + if (gpio->used_bits & bit_mask) { + gpio->used_bits &= ~bit_mask; + if (gpio->output_bits & bit_mask) { + gpio->output_bits &= ~bit_mask; + + if (gpio->ptp_bits & bit_mask) { + gpio->ptp_bits &= ~bit_mask; + /* disable ptp output */ + gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_OE_BIT_(bit); + lan743x_csr_write(adapter, GPIO_CFG3, + gpio->gpio_cfg3); + } + /* release gpio output */ + + /* disable gpio */ + gpio->gpio_cfg1 |= GPIO_CFG1_GPIOEN_BIT_(bit); + gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOBUF_BIT_(bit); + lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1); + + /* reset back to input */ + gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DIR_BIT_(bit); + gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(bit); + lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0); + } + } + spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags); +} + +static int lan743x_ptpci_adjfine(struct ptp_clock_info *ptpci, long scaled_ppm) +{ + struct lan743x_ptp *ptp = + container_of(ptpci, struct lan743x_ptp, ptp_clock_info); + struct lan743x_adapter *adapter = + container_of(ptp, struct lan743x_adapter, ptp); + u32 lan743x_rate_adj = 0; + bool positive = true; + u64 u64_delta = 0; + + if ((scaled_ppm < (-LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM)) || + scaled_ppm > LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM) { + return -EINVAL; + } + if (scaled_ppm > 0) { + u64_delta = (u64)scaled_ppm; + positive = true; + } else { + u64_delta = (u64)(-scaled_ppm); + positive = false; + } + u64_delta = (u64_delta << 19); + lan743x_rate_adj = div_u64(u64_delta, 1000000); + + if (positive) + lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_; + + lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ, + lan743x_rate_adj); + + return 0; +} + +static int lan743x_ptpci_adjfreq(struct ptp_clock_info *ptpci, s32 delta_ppb) +{ + struct lan743x_ptp *ptp = + container_of(ptpci, struct lan743x_ptp, ptp_clock_info); + struct lan743x_adapter *adapter = + container_of(ptp, struct lan743x_adapter, ptp); + u32 lan743x_rate_adj = 0; + bool positive = true; + u32 u32_delta = 0; + u64 u64_delta = 0; + + if ((delta_ppb < (-LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB)) || + delta_ppb > LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB) { + return -EINVAL; + } + if (delta_ppb > 0) { + u32_delta = (u32)delta_ppb; + positive = true; + } else { + u32_delta = (u32)(-delta_ppb); + positive = false; + } + u64_delta = (((u64)u32_delta) << 35); + lan743x_rate_adj = div_u64(u64_delta, 1000000000); + + if (positive) + lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_; + + lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ, + lan743x_rate_adj); + + return 0; +} + +static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta) +{ + struct lan743x_ptp *ptp = + container_of(ptpci, struct lan743x_ptp, ptp_clock_info); + struct lan743x_adapter *adapter = + container_of(ptp, struct lan743x_adapter, ptp); + + lan743x_ptp_clock_step(adapter, delta); + + return 0; +} + +static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci, + struct timespec64 *ts) +{ + struct lan743x_ptp *ptp = + container_of(ptpci, struct lan743x_ptp, ptp_clock_info); + struct lan743x_adapter *adapter = + container_of(ptp, struct lan743x_adapter, ptp); + u32 nano_seconds = 0; + u32 seconds = 0; + + lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL); + ts->tv_sec = seconds; + ts->tv_nsec = nano_seconds; + + return 0; +} + +static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci, + const struct timespec64 *ts) +{ + struct lan743x_ptp *ptp = + container_of(ptpci, struct lan743x_ptp, ptp_clock_info); + struct lan743x_adapter *adapter = + container_of(ptp, struct lan743x_adapter, ptp); + u32 nano_seconds = 0; + u32 seconds = 0; + + if (ts) { + if (ts->tv_sec > 0xFFFFFFFFLL || + ts->tv_sec < 0) { + netif_warn(adapter, drv, adapter->netdev, + "ts->tv_sec out of range, %lld\n", + ts->tv_sec); + return -ERANGE; + } + if (ts->tv_nsec >= 1000000000L || + ts->tv_nsec < 0) { + netif_warn(adapter, drv, adapter->netdev, + "ts->tv_nsec out of range, %ld\n", + ts->tv_nsec); + return -ERANGE; + } + seconds = ts->tv_sec; + nano_seconds = ts->tv_nsec; + lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0); + } else { + netif_warn(adapter, drv, adapter->netdev, "ts == NULL\n"); + return -EINVAL; + } + + return 0; +} + +static void lan743x_ptp_perout_off(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + u32 general_config = 0; + + if (ptp->perout_gpio_bit >= 0) { + lan743x_gpio_release(adapter, ptp->perout_gpio_bit); + ptp->perout_gpio_bit = -1; + } + + if (ptp->perout_event_ch >= 0) { + /* set target to far in the future, effectively disabling it */ + lan743x_csr_write(adapter, + PTP_CLOCK_TARGET_SEC_X(ptp->perout_event_ch), + 0xFFFF0000); + lan743x_csr_write(adapter, + PTP_CLOCK_TARGET_NS_X(ptp->perout_event_ch), + 0); + + general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG); + general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_ + (ptp->perout_event_ch); + lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config); + lan743x_ptp_release_event_ch(adapter, ptp->perout_event_ch); + ptp->perout_event_ch = -1; + } +} + +static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on, + struct ptp_perout_request *perout) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + u32 period_sec = 0, period_nsec = 0; + u32 start_sec = 0, start_nsec = 0; + u32 general_config = 0; + int pulse_width = 0; + int perout_bit = 0; + + if (!on) { + lan743x_ptp_perout_off(adapter); + return 0; + } + + if (ptp->perout_event_ch >= 0 || + ptp->perout_gpio_bit >= 0) { + /* already on, turn off first */ + lan743x_ptp_perout_off(adapter); + } + + ptp->perout_event_ch = lan743x_ptp_reserve_event_ch(adapter); + if (ptp->perout_event_ch < 0) { + netif_warn(adapter, drv, adapter->netdev, + "Failed to reserve event channel for PEROUT\n"); + goto failed; + } + + switch (adapter->csr.id_rev & ID_REV_ID_MASK_) { + case ID_REV_ID_LAN7430_: + perout_bit = 2;/* GPIO 2 is preferred on EVB LAN7430 */ + break; + case ID_REV_ID_LAN7431_: + perout_bit = 4;/* GPIO 4 is preferred on EVB LAN7431 */ + break; + } + + ptp->perout_gpio_bit = lan743x_gpio_rsrv_ptp_out(adapter, + perout_bit, + ptp->perout_event_ch); + + if (ptp->perout_gpio_bit < 0) { + netif_warn(adapter, drv, adapter->netdev, + "Failed to reserve gpio %d for PEROUT\n", + perout_bit); + goto failed; + } + + start_sec = perout->start.sec; + start_sec += perout->start.nsec / 1000000000; + start_nsec = perout->start.nsec % 1000000000; + + period_sec = perout->period.sec; + period_sec += perout->period.nsec / 1000000000; + period_nsec = perout->period.nsec % 1000000000; + + if (period_sec == 0) { + if (period_nsec >= 400000000) { + pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_; + } else if (period_nsec >= 20000000) { + pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_; + } else if (period_nsec >= 2000000) { + pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_; + } else if (period_nsec >= 200000) { + pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_; + } else if (period_nsec >= 20000) { + pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_; + } else if (period_nsec >= 200) { + pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_; + } else { + netif_warn(adapter, drv, adapter->netdev, + "perout period too small, minimum is 200nS\n"); + goto failed; + } + } else { + pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_; + } + + /* turn off by setting target far in future */ + lan743x_csr_write(adapter, + PTP_CLOCK_TARGET_SEC_X(ptp->perout_event_ch), + 0xFFFF0000); + lan743x_csr_write(adapter, + PTP_CLOCK_TARGET_NS_X(ptp->perout_event_ch), 0); + + /* Configure to pulse every period */ + general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG); + general_config &= ~(PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_ + (ptp->perout_event_ch)); + general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_ + (ptp->perout_event_ch, pulse_width); + general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_ + (ptp->perout_event_ch); + lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config); + + /* set the reload to one toggle cycle */ + lan743x_csr_write(adapter, + PTP_CLOCK_TARGET_RELOAD_SEC_X(ptp->perout_event_ch), + period_sec); + lan743x_csr_write(adapter, + PTP_CLOCK_TARGET_RELOAD_NS_X(ptp->perout_event_ch), + period_nsec); + + /* set the start time */ + lan743x_csr_write(adapter, + PTP_CLOCK_TARGET_SEC_X(ptp->perout_event_ch), + start_sec); + lan743x_csr_write(adapter, + PTP_CLOCK_TARGET_NS_X(ptp->perout_event_ch), + start_nsec); + + return 0; + +failed: + lan743x_ptp_perout_off(adapter); + return -ENODEV; +} + +static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci, + struct ptp_clock_request *request, int on) +{ + struct lan743x_ptp *ptp = + container_of(ptpci, struct lan743x_ptp, ptp_clock_info); + struct lan743x_adapter *adapter = + container_of(ptp, struct lan743x_adapter, ptp); + + if (request) { + switch (request->type) { + case PTP_CLK_REQ_EXTTS: + return -EINVAL; + case PTP_CLK_REQ_PEROUT: + if (request->perout.index == 0) + return lan743x_ptp_perout(adapter, on, + &request->perout); + return -EINVAL; + case PTP_CLK_REQ_PPS: + return -EINVAL; + default: + netif_err(adapter, drv, adapter->netdev, + "request->type == %d, Unknown\n", + request->type); + break; + } + } else { + netif_err(adapter, drv, adapter->netdev, "request == NULL\n"); + } + return 0; +} + +static long lan743x_ptpci_do_aux_work(struct ptp_clock_info *ptpci) +{ + struct lan743x_ptp *ptp = + container_of(ptpci, struct lan743x_ptp, ptp_clock_info); + struct lan743x_adapter *adapter = + container_of(ptp, struct lan743x_adapter, ptp); + u32 cap_info, cause, header, nsec, seconds; + bool new_timestamp_available = false; + int count = 0; + + while ((count < 100) && + (lan743x_csr_read(adapter, PTP_INT_STS) & PTP_INT_BIT_TX_TS_)) { + count++; + cap_info = lan743x_csr_read(adapter, PTP_CAP_INFO); + + if (PTP_CAP_INFO_TX_TS_CNT_GET_(cap_info) > 0) { + seconds = lan743x_csr_read(adapter, + PTP_TX_EGRESS_SEC); + nsec = lan743x_csr_read(adapter, PTP_TX_EGRESS_NS); + cause = (nsec & + PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_); + header = lan743x_csr_read(adapter, + PTP_TX_MSG_HEADER); + + if (cause == PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_) { + nsec &= PTP_TX_EGRESS_NS_TS_NS_MASK_; + lan743x_ptp_tx_ts_enqueue_ts(adapter, + seconds, nsec, + header); + new_timestamp_available = true; + } else if (cause == + PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_) { + netif_err(adapter, drv, adapter->netdev, + "Auto capture cause not supported\n"); + } else { + netif_warn(adapter, drv, adapter->netdev, + "unknown tx timestamp capture cause\n"); + } + } else { + netif_warn(adapter, drv, adapter->netdev, + "TX TS INT but no TX TS CNT\n"); + } + lan743x_csr_write(adapter, PTP_INT_STS, PTP_INT_BIT_TX_TS_); + } + + if (new_timestamp_available) + lan743x_ptp_tx_ts_complete(adapter); + + lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_); + + return -1; +} + +static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter, + u32 *seconds, u32 *nano_seconds, + u32 *sub_nano_seconds) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + mutex_lock(&ptp->command_lock); + + lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_); + lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_); + + if (seconds) + (*seconds) = lan743x_csr_read(adapter, PTP_CLOCK_SEC); + + if (nano_seconds) + (*nano_seconds) = lan743x_csr_read(adapter, PTP_CLOCK_NS); + + if (sub_nano_seconds) + (*sub_nano_seconds) = + lan743x_csr_read(adapter, PTP_CLOCK_SUBNS); + + mutex_unlock(&ptp->command_lock); +} + +static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter, + s64 time_step_ns) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + u32 nano_seconds_step = 0; + u64 abs_time_step_ns = 0; + u32 unsigned_seconds = 0; + u32 nano_seconds = 0; + u32 remainder = 0; + s32 seconds = 0; + + if (time_step_ns > 15000000000LL) { + /* convert to clock set */ + lan743x_ptp_clock_get(adapter, &unsigned_seconds, + &nano_seconds, NULL); + unsigned_seconds += div_u64_rem(time_step_ns, 1000000000LL, + &remainder); + nano_seconds += remainder; + if (nano_seconds >= 1000000000) { + unsigned_seconds++; + nano_seconds -= 1000000000; + } + lan743x_ptp_clock_set(adapter, unsigned_seconds, + nano_seconds, 0); + return; + } else if (time_step_ns < -15000000000LL) { + /* convert to clock set */ + time_step_ns = -time_step_ns; + + lan743x_ptp_clock_get(adapter, &unsigned_seconds, + &nano_seconds, NULL); + unsigned_seconds -= div_u64_rem(time_step_ns, 1000000000LL, + &remainder); + nano_seconds_step = remainder; + if (nano_seconds < nano_seconds_step) { + unsigned_seconds--; + nano_seconds += 1000000000; + } + nano_seconds -= nano_seconds_step; + lan743x_ptp_clock_set(adapter, unsigned_seconds, + nano_seconds, 0); + return; + } + + /* do clock step */ + if (time_step_ns >= 0) { + abs_time_step_ns = (u64)(time_step_ns); + seconds = (s32)div_u64_rem(abs_time_step_ns, 1000000000, + &remainder); + nano_seconds = (u32)remainder; + } else { + abs_time_step_ns = (u64)(-time_step_ns); + seconds = -((s32)div_u64_rem(abs_time_step_ns, 1000000000, + &remainder)); + nano_seconds = (u32)remainder; + if (nano_seconds > 0) { + /* subtracting nano seconds is not allowed + * convert to subtracting from seconds, + * and adding to nanoseconds + */ + seconds--; + nano_seconds = (1000000000 - nano_seconds); + } + } + + if (nano_seconds > 0) { + /* add 8 ns to cover the likely normal increment */ + nano_seconds += 8; + } + + if (nano_seconds >= 1000000000) { + /* carry into seconds */ + seconds++; + nano_seconds -= 1000000000; + } + + while (seconds) { + mutex_lock(&ptp->command_lock); + if (seconds > 0) { + u32 adjustment_value = (u32)seconds; + + if (adjustment_value > 0xF) + adjustment_value = 0xF; + lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ, + PTP_CLOCK_STEP_ADJ_DIR_ | + adjustment_value); + seconds -= ((s32)adjustment_value); + } else { + u32 adjustment_value = (u32)(-seconds); + + if (adjustment_value > 0xF) + adjustment_value = 0xF; + lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ, + adjustment_value); + seconds += ((s32)adjustment_value); + } + lan743x_csr_write(adapter, PTP_CMD_CTL, + PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_); + lan743x_ptp_wait_till_cmd_done(adapter, + PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_); + mutex_unlock(&ptp->command_lock); + } + if (nano_seconds) { + mutex_lock(&ptp->command_lock); + lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ, + PTP_CLOCK_STEP_ADJ_DIR_ | + (nano_seconds & + PTP_CLOCK_STEP_ADJ_VALUE_MASK_)); + lan743x_csr_write(adapter, PTP_CMD_CTL, + PTP_CMD_CTL_PTP_CLK_STP_NSEC_); + lan743x_ptp_wait_till_cmd_done(adapter, + PTP_CMD_CTL_PTP_CLK_STP_NSEC_); + mutex_unlock(&ptp->command_lock); + } +} + +void lan743x_ptp_isr(void *context) +{ + struct lan743x_adapter *adapter = (struct lan743x_adapter *)context; + struct lan743x_ptp *ptp = NULL; + int enable_flag = 1; + u32 ptp_int_sts = 0; + + ptp = &adapter->ptp; + + lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_); + + ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS); + ptp_int_sts &= lan743x_csr_read(adapter, PTP_INT_EN_SET); + + if (ptp_int_sts & PTP_INT_BIT_TX_TS_) { + ptp_schedule_worker(ptp->ptp_clock, 0); + enable_flag = 0;/* tasklet will re-enable later */ + } + if (ptp_int_sts & PTP_INT_BIT_TX_SWTS_ERR_) { + netif_err(adapter, drv, adapter->netdev, + "PTP TX Software Timestamp Error\n"); + /* clear int status bit */ + lan743x_csr_write(adapter, PTP_INT_STS, + PTP_INT_BIT_TX_SWTS_ERR_); + } + if (ptp_int_sts & PTP_INT_BIT_TIMER_B_) { + /* clear int status bit */ + lan743x_csr_write(adapter, PTP_INT_STS, + PTP_INT_BIT_TIMER_B_); + } + if (ptp_int_sts & PTP_INT_BIT_TIMER_A_) { + /* clear int status bit */ + lan743x_csr_write(adapter, PTP_INT_STS, + PTP_INT_BIT_TIMER_A_); + } + + if (enable_flag) { + /* re-enable isr */ + lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_); + } +} + +static void lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter *adapter, + struct sk_buff *skb, bool ignore_sync) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + spin_lock_bh(&ptp->tx_ts_lock); + if (ptp->tx_ts_skb_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) { + ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size] = skb; + if (ignore_sync) + ptp->tx_ts_ignore_sync_queue |= + BIT(ptp->tx_ts_skb_queue_size); + ptp->tx_ts_skb_queue_size++; + } else { + /* this should never happen, so long as the tx channel + * calls and honors the result from + * lan743x_ptp_request_tx_timestamp + */ + netif_err(adapter, drv, adapter->netdev, + "tx ts skb queue overflow\n"); + dev_kfree_skb(skb); + } + spin_unlock_bh(&ptp->tx_ts_lock); +} + +static void lan743x_ptp_sync_to_system_clock(struct lan743x_adapter *adapter) +{ + struct timespec64 ts; + + memset(&ts, 0, sizeof(ts)); + timekeeping_clocktai64(&ts); + + lan743x_ptp_clock_set(adapter, ts.tv_sec, ts.tv_nsec, 0); +} + +void lan743x_ptp_update_latency(struct lan743x_adapter *adapter, + u32 link_speed) +{ + switch (link_speed) { + case 10: + lan743x_csr_write(adapter, PTP_LATENCY, + PTP_LATENCY_TX_SET_(0) | + PTP_LATENCY_RX_SET_(0)); + break; + case 100: + lan743x_csr_write(adapter, PTP_LATENCY, + PTP_LATENCY_TX_SET_(181) | + PTP_LATENCY_RX_SET_(594)); + break; + case 1000: + lan743x_csr_write(adapter, PTP_LATENCY, + PTP_LATENCY_TX_SET_(30) | + PTP_LATENCY_RX_SET_(525)); + break; + } +} + +int lan743x_ptp_init(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + mutex_init(&ptp->command_lock); + spin_lock_init(&ptp->tx_ts_lock); + ptp->used_event_ch = 0; + ptp->perout_event_ch = -1; + ptp->perout_gpio_bit = -1; + return 0; +} + +int lan743x_ptp_open(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + int ret = -ENODEV; + u32 temp; + + lan743x_ptp_reset(adapter); + lan743x_ptp_sync_to_system_clock(adapter); + temp = lan743x_csr_read(adapter, PTP_TX_MOD2); + temp |= PTP_TX_MOD2_TX_PTP_CLR_UDPV4_CHKSUM_; + lan743x_csr_write(adapter, PTP_TX_MOD2, temp); + lan743x_ptp_enable(adapter); + lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_); + lan743x_csr_write(adapter, PTP_INT_EN_SET, + PTP_INT_BIT_TX_SWTS_ERR_ | PTP_INT_BIT_TX_TS_); + ptp->flags |= PTP_FLAG_ISR_ENABLED; + + if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK)) + return 0; + + snprintf(ptp->pin_config[0].name, 32, "lan743x_ptp_pin_0"); + ptp->pin_config[0].index = 0; + ptp->pin_config[0].func = PTP_PF_PEROUT; + ptp->pin_config[0].chan = 0; + + ptp->ptp_clock_info.owner = THIS_MODULE; + snprintf(ptp->ptp_clock_info.name, 16, "%pm", + adapter->netdev->dev_addr); + ptp->ptp_clock_info.max_adj = LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB; + ptp->ptp_clock_info.n_alarm = 0; + ptp->ptp_clock_info.n_ext_ts = 0; + ptp->ptp_clock_info.n_per_out = 1; + ptp->ptp_clock_info.n_pins = 0; + ptp->ptp_clock_info.pps = 0; + ptp->ptp_clock_info.pin_config = NULL; + ptp->ptp_clock_info.adjfine = lan743x_ptpci_adjfine; + ptp->ptp_clock_info.adjfreq = lan743x_ptpci_adjfreq; + ptp->ptp_clock_info.adjtime = lan743x_ptpci_adjtime; + ptp->ptp_clock_info.gettime64 = lan743x_ptpci_gettime64; + ptp->ptp_clock_info.getcrosststamp = NULL; + ptp->ptp_clock_info.settime64 = lan743x_ptpci_settime64; + ptp->ptp_clock_info.enable = lan743x_ptpci_enable; + ptp->ptp_clock_info.do_aux_work = lan743x_ptpci_do_aux_work; + ptp->ptp_clock_info.verify = NULL; + + ptp->ptp_clock = ptp_clock_register(&ptp->ptp_clock_info, + &adapter->pdev->dev); + + if (IS_ERR(ptp->ptp_clock)) { + netif_err(adapter, ifup, adapter->netdev, + "ptp_clock_register failed\n"); + goto done; + } + ptp->flags |= PTP_FLAG_PTP_CLOCK_REGISTERED; + netif_info(adapter, ifup, adapter->netdev, + "successfully registered ptp clock\n"); + + return 0; +done: + lan743x_ptp_close(adapter); + return ret; +} + +void lan743x_ptp_close(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + int index; + + if (IS_ENABLED(CONFIG_PTP_1588_CLOCK) && + ptp->flags & PTP_FLAG_PTP_CLOCK_REGISTERED) { + ptp_clock_unregister(ptp->ptp_clock); + ptp->ptp_clock = NULL; + ptp->flags &= ~PTP_FLAG_PTP_CLOCK_REGISTERED; + netif_info(adapter, drv, adapter->netdev, + "ptp clock unregister\n"); + } + + if (ptp->flags & PTP_FLAG_ISR_ENABLED) { + lan743x_csr_write(adapter, PTP_INT_EN_CLR, + PTP_INT_BIT_TX_SWTS_ERR_ | + PTP_INT_BIT_TX_TS_); + lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_); + ptp->flags &= ~PTP_FLAG_ISR_ENABLED; + } + + /* clean up pending timestamp requests */ + lan743x_ptp_tx_ts_complete(adapter); + spin_lock_bh(&ptp->tx_ts_lock); + for (index = 0; + index < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS; + index++) { + struct sk_buff *skb = ptp->tx_ts_skb_queue[index]; + + if (skb) + dev_kfree_skb(skb); + ptp->tx_ts_skb_queue[index] = NULL; + ptp->tx_ts_seconds_queue[index] = 0; + ptp->tx_ts_nseconds_queue[index] = 0; + } + ptp->tx_ts_skb_queue_size = 0; + ptp->tx_ts_queue_size = 0; + ptp->pending_tx_timestamps = 0; + spin_unlock_bh(&ptp->tx_ts_lock); + + lan743x_ptp_disable(adapter); +} + +void lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter *adapter, + bool ts_insert_enable) +{ + u32 ptp_tx_mod = lan743x_csr_read(adapter, PTP_TX_MOD); + + if (ts_insert_enable) + ptp_tx_mod |= PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_; + else + ptp_tx_mod &= ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_; + + lan743x_csr_write(adapter, PTP_TX_MOD, ptp_tx_mod); +} + +static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter) +{ + if (lan743x_csr_read(adapter, PTP_CMD_CTL) & PTP_CMD_CTL_PTP_ENABLE_) + return true; + return false; +} + +static void lan743x_ptp_enable(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + mutex_lock(&ptp->command_lock); + + if (lan743x_ptp_is_enabled(adapter)) { + netif_warn(adapter, drv, adapter->netdev, + "PTP already enabled\n"); + goto done; + } + lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_); +done: + mutex_unlock(&ptp->command_lock); +} + +static void lan743x_ptp_disable(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + mutex_lock(&ptp->command_lock); + if (!lan743x_ptp_is_enabled(adapter)) { + netif_warn(adapter, drv, adapter->netdev, + "PTP already disabled\n"); + goto done; + } + lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_DISABLE_); + lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_ENABLE_); +done: + mutex_unlock(&ptp->command_lock); +} + +static void lan743x_ptp_reset(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + mutex_lock(&ptp->command_lock); + + if (lan743x_ptp_is_enabled(adapter)) { + netif_err(adapter, drv, adapter->netdev, + "Attempting reset while enabled\n"); + goto done; + } + + lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_RESET_); + lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_RESET_); +done: + mutex_unlock(&ptp->command_lock); +} + +static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter, + u32 seconds, u32 nano_seconds, + u32 sub_nano_seconds) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + mutex_lock(&ptp->command_lock); + + lan743x_csr_write(adapter, PTP_CLOCK_SEC, seconds); + lan743x_csr_write(adapter, PTP_CLOCK_NS, nano_seconds); + lan743x_csr_write(adapter, PTP_CLOCK_SUBNS, sub_nano_seconds); + + lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_); + lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_LOAD_); + mutex_unlock(&ptp->command_lock); +} + +bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + bool result = false; + + spin_lock_bh(&ptp->tx_ts_lock); + if (ptp->pending_tx_timestamps < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) { + /* request granted */ + ptp->pending_tx_timestamps++; + result = true; + } + spin_unlock_bh(&ptp->tx_ts_lock); + return result; +} + +void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter) +{ + struct lan743x_ptp *ptp = &adapter->ptp; + + spin_lock_bh(&ptp->tx_ts_lock); + if (ptp->pending_tx_timestamps > 0) + ptp->pending_tx_timestamps--; + else + netif_err(adapter, drv, adapter->netdev, + "unrequest failed, pending_tx_timestamps==0\n"); + spin_unlock_bh(&ptp->tx_ts_lock); +} + +void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter, + struct sk_buff *skb, bool ignore_sync) +{ + lan743x_ptp_tx_ts_enqueue_skb(adapter, skb, ignore_sync); + + lan743x_ptp_tx_ts_complete(adapter); +} + +int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + struct lan743x_adapter *adapter = netdev_priv(netdev); + struct hwtstamp_config config; + int ret = 0; + int index; + + if (!ifr) { + netif_err(adapter, drv, adapter->netdev, + "SIOCSHWTSTAMP, ifr == NULL\n"); + return -EINVAL; + } + + if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) + return -EFAULT; + + if (config.flags) { + netif_warn(adapter, drv, adapter->netdev, + "ignoring hwtstamp_config.flags == 0x%08X, expected 0\n", + config.flags); + } + + switch (config.tx_type) { + case HWTSTAMP_TX_OFF: + for (index = 0; index < LAN743X_MAX_TX_CHANNELS; + index++) + lan743x_tx_set_timestamping_mode(&adapter->tx[index], + false, false); + lan743x_ptp_set_sync_ts_insert(adapter, false); + break; + case HWTSTAMP_TX_ON: + for (index = 0; index < LAN743X_MAX_TX_CHANNELS; + index++) + lan743x_tx_set_timestamping_mode(&adapter->tx[index], + true, false); + lan743x_ptp_set_sync_ts_insert(adapter, false); + break; + case HWTSTAMP_TX_ONESTEP_SYNC: + for (index = 0; index < LAN743X_MAX_TX_CHANNELS; + index++) + lan743x_tx_set_timestamping_mode(&adapter->tx[index], + true, true); + + lan743x_ptp_set_sync_ts_insert(adapter, true); + break; + default: + netif_warn(adapter, drv, adapter->netdev, + " tx_type = %d, UNKNOWN\n", config.tx_type); + ret = -EINVAL; + break; + } + + if (!ret) + return copy_to_user(ifr->ifr_data, &config, + sizeof(config)) ? -EFAULT : 0; + return ret; +} |