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linux-zen-server/drivers/net/ethernet/microchip/lan743x_ptp.c

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Initial commit
2023-08-30 17:53:23 +02:00
/* SPDX-License-Identifier: GPL-2.0+ */
/* Copyright (C) 2018 Microchip Technology Inc. */
#include <linux/netdevice.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/net_tstamp.h>
#include "lan743x_main.h"
#include "lan743x_ptp.h"
#define LAN743X_LED0_ENABLE 20 /* LED0 offset in HW_CFG */
#define LAN743X_LED_ENABLE(pin) BIT(LAN743X_LED0_ENABLE + (pin))
#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);
static int lan743x_get_channel(u32 ch_map)
{
int idx;
for (idx = 0; idx < 32; idx++) {
if (ch_map & (0x1 << idx))
return idx;
}
return -EINVAL;
}
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,
int event_channel)
{
struct lan743x_ptp *ptp = &adapter->ptp;
int result = -ENODEV;
mutex_lock(&ptp->command_lock);
if (!(test_bit(event_channel, &ptp->used_event_ch))) {
ptp->used_event_ch |= BIT(event_channel);
result = event_channel;
} else {
netif_warn(adapter, drv, adapter->netdev,
"attempted to reserved a used event_channel = %d\n",
event_channel);
}
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_io_clock_get(struct lan743x_adapter *adapter,
u32 *sec, u32 *nsec, u32 *sub_nsec);
static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
s64 time_step_ns);
static void lan743x_led_mux_enable(struct lan743x_adapter *adapter,
int pin, bool enable)
{
struct lan743x_ptp *ptp = &adapter->ptp;
if (ptp->leds_multiplexed &&
ptp->led_enabled[pin]) {
u32 val = lan743x_csr_read(adapter, HW_CFG);
if (enable)
val |= LAN743X_LED_ENABLE(pin);
else
val &= ~LAN743X_LED_ENABLE(pin);
lan743x_csr_write(adapter, HW_CFG, val);
}
}
static void lan743x_led_mux_save(struct lan743x_adapter *adapter)
{
struct lan743x_ptp *ptp = &adapter->ptp;
u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
if (id_rev == ID_REV_ID_LAN7430_) {
int i;
u32 val = lan743x_csr_read(adapter, HW_CFG);
for (i = 0; i < LAN7430_N_LED; i++) {
bool led_enabled = (val & LAN743X_LED_ENABLE(i)) != 0;
ptp->led_enabled[i] = led_enabled;
}
ptp->leds_multiplexed = true;
} else {
ptp->leds_multiplexed = false;
}
}
static void lan743x_led_mux_restore(struct lan743x_adapter *adapter)
{
u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
if (id_rev == ID_REV_ID_LAN7430_) {
int i;
for (i = 0; i < LAN7430_N_LED; i++)
lan743x_led_mux_enable(adapter, i, true);
}
}
static int lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter *adapter,
int pin, int event_channel)
{
struct lan743x_gpio *gpio = &adapter->gpio;
unsigned long irq_flags = 0;
int bit_mask = BIT(pin);
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;
/* assign pin to GPIO function */
lan743x_led_mux_enable(adapter, pin, false);
/* set as output, and zero initial value */
gpio->gpio_cfg0 |= GPIO_CFG0_GPIO_DIR_BIT_(pin);
gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin);
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_(pin);
gpio->gpio_cfg1 |= GPIO_CFG1_GPIOBUF_BIT_(pin);
lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
/* set 1588 polarity to high */
gpio->gpio_cfg2 |= GPIO_CFG2_1588_POL_BIT_(pin);
lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
if (event_channel == 0) {
/* use channel A */
gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_CH_SEL_BIT_(pin);
} else {
/* use channel B */
gpio->gpio_cfg3 |= GPIO_CFG3_1588_CH_SEL_BIT_(pin);
}
gpio->gpio_cfg3 |= GPIO_CFG3_1588_OE_BIT_(pin);
lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
ret = pin;
}
spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
return ret;
}
static void lan743x_gpio_release(struct lan743x_adapter *adapter, int pin)
{
struct lan743x_gpio *gpio = &adapter->gpio;
unsigned long irq_flags = 0;
int bit_mask = BIT(pin);
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_(pin);
lan743x_csr_write(adapter, GPIO_CFG3,
gpio->gpio_cfg3);
}
/* release gpio output */
/* disable gpio */
gpio->gpio_cfg1 |= GPIO_CFG1_GPIOEN_BIT_(pin);
gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOBUF_BIT_(pin);
lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
/* reset back to input */
gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DIR_BIT_(pin);
gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin);
lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
/* assign pin to original function */
lan743x_led_mux_enable(adapter, pin, true);
}
}
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;
u64 u64_delta;
if ((scaled_ppm < (-LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM)) ||
scaled_ppm > LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM) {
return -EINVAL;
}
/* diff_by_scaled_ppm returns true if the difference is negative */
if (diff_by_scaled_ppm(1ULL << 35, scaled_ppm, &u64_delta))
lan743x_rate_adj = (u32)u64_delta;
else
lan743x_rate_adj = (u32)u64_delta | 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;
if (adapter->is_pci11x1x)
lan743x_ptp_io_clock_get(adapter, &seconds, &nano_seconds,
NULL);
else
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,
unsigned int index)
{
struct lan743x_ptp *ptp = &adapter->ptp;
u32 general_config = 0;
struct lan743x_ptp_perout *perout = &ptp->perout[index];
if (perout->gpio_pin >= 0) {
lan743x_gpio_release(adapter, perout->gpio_pin);
perout->gpio_pin = -1;
}
if (perout->event_ch >= 0) {
/* set target to far in the future, effectively disabling it */
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
0xFFFF0000);
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_NS_X(perout->event_ch),
0);
general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_
(perout->event_ch);
lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
lan743x_ptp_release_event_ch(adapter, perout->event_ch);
perout->event_ch = -1;
}
}
static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on,
struct ptp_perout_request *perout_request)
{
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_pin = 0;
unsigned int index = perout_request->index;
struct lan743x_ptp_perout *perout = &ptp->perout[index];
int ret = 0;
/* Reject requests with unsupported flags */
if (perout_request->flags & ~PTP_PEROUT_DUTY_CYCLE)
return -EOPNOTSUPP;
if (on) {
perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT,
perout_request->index);
if (perout_pin < 0)
return -EBUSY;
} else {
lan743x_ptp_perout_off(adapter, index);
return 0;
}
if (perout->event_ch >= 0 ||
perout->gpio_pin >= 0) {
/* already on, turn off first */
lan743x_ptp_perout_off(adapter, index);
}
perout->event_ch = lan743x_ptp_reserve_event_ch(adapter, index);
if (perout->event_ch < 0) {
netif_warn(adapter, drv, adapter->netdev,
"Failed to reserve event channel %d for PEROUT\n",
index);
ret = -EBUSY;
goto failed;
}
perout->gpio_pin = lan743x_gpio_rsrv_ptp_out(adapter,
perout_pin,
perout->event_ch);
if (perout->gpio_pin < 0) {
netif_warn(adapter, drv, adapter->netdev,
"Failed to reserve gpio %d for PEROUT\n",
perout_pin);
ret = -EBUSY;
goto failed;
}
start_sec = perout_request->start.sec;
start_sec += perout_request->start.nsec / 1000000000;
start_nsec = perout_request->start.nsec % 1000000000;
period_sec = perout_request->period.sec;
period_sec += perout_request->period.nsec / 1000000000;
period_nsec = perout_request->period.nsec % 1000000000;
if (perout_request->flags & PTP_PEROUT_DUTY_CYCLE) {
struct timespec64 ts_on, ts_period;
s64 wf_high, period64, half;
s32 reminder;
ts_on.tv_sec = perout_request->on.sec;
ts_on.tv_nsec = perout_request->on.nsec;
wf_high = timespec64_to_ns(&ts_on);
ts_period.tv_sec = perout_request->period.sec;
ts_period.tv_nsec = perout_request->period.nsec;
period64 = timespec64_to_ns(&ts_period);
if (period64 < 200) {
netif_warn(adapter, drv, adapter->netdev,
"perout period too small, minimum is 200nS\n");
ret = -EOPNOTSUPP;
goto failed;
}
if (wf_high >= period64) {
netif_warn(adapter, drv, adapter->netdev,
"pulse width must be smaller than period\n");
ret = -EINVAL;
goto failed;
}
/* Check if we can do 50% toggle on an even value of period.
* If the period number is odd, then check if the requested
* pulse width is the same as one of pre-defined width values.
* Otherwise, return failure.
*/
half = div_s64_rem(period64, 2, &reminder);
if (!reminder) {
if (half == wf_high) {
/* It's 50% match. Use the toggle option */
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_TOGGLE_;
/* In this case, devide period value by 2 */
ts_period = ns_to_timespec64(div_s64(period64, 2));
period_sec = ts_period.tv_sec;
period_nsec = ts_period.tv_nsec;
goto program;
}
}
/* if we can't do toggle, then the width option needs to be the exact match */
if (wf_high == 200000000) {
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
} else if (wf_high == 10000000) {
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
} else if (wf_high == 1000000) {
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
} else if (wf_high == 100000) {
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
} else if (wf_high == 10000) {
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
} else if (wf_high == 100) {
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
} else {
netif_warn(adapter, drv, adapter->netdev,
"duty cycle specified is not supported\n");
ret = -EOPNOTSUPP;
goto failed;
}
} else {
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");
ret = -EOPNOTSUPP;
goto failed;
}
} else {
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
}
}
program:
/* turn off by setting target far in future */
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
0xFFFF0000);
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_NS_X(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_
(perout->event_ch));
general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
(perout->event_ch, pulse_width);
general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_
(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(perout->event_ch),
period_sec);
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_RELOAD_NS_X(perout->event_ch),
period_nsec);
/* set the start time */
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
start_sec);
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_NS_X(perout->event_ch),
start_nsec);
return 0;
failed:
lan743x_ptp_perout_off(adapter, index);
return ret;
}
static void lan743x_ptp_io_perout_off(struct lan743x_adapter *adapter,
u32 index)
{
struct lan743x_ptp *ptp = &adapter->ptp;
int perout_pin;
int event_ch;
u32 gen_cfg;
int val;
event_ch = ptp->ptp_io_perout[index];
if (event_ch >= 0) {
/* set target to far in the future, effectively disabling it */
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_SEC_X(event_ch),
0xFFFF0000);
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_NS_X(event_ch),
0);
gen_cfg = lan743x_csr_read(adapter, HS_PTP_GENERAL_CONFIG);
gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_
(event_ch));
gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(event_ch));
gen_cfg |= HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(event_ch);
lan743x_csr_write(adapter, HS_PTP_GENERAL_CONFIG, gen_cfg);
if (event_ch)
lan743x_csr_write(adapter, PTP_INT_STS,
PTP_INT_TIMER_INT_B_);
else
lan743x_csr_write(adapter, PTP_INT_STS,
PTP_INT_TIMER_INT_A_);
lan743x_ptp_release_event_ch(adapter, event_ch);
ptp->ptp_io_perout[index] = -1;
}
perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, index);
/* Deselect Event output */
val = lan743x_csr_read(adapter, PTP_IO_EVENT_OUTPUT_CFG);
/* Disables the output of Local Time Target compare events */
val &= ~PTP_IO_EVENT_OUTPUT_CFG_EN_(perout_pin);
lan743x_csr_write(adapter, PTP_IO_EVENT_OUTPUT_CFG, val);
/* Configured as an opendrain driver*/
val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
val &= ~PTP_IO_PIN_CFG_OBUF_TYPE_(perout_pin);
lan743x_csr_write(adapter, PTP_IO_PIN_CFG, val);
/* Dummy read to make sure write operation success */
val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
}
static int lan743x_ptp_io_perout(struct lan743x_adapter *adapter, int on,
struct ptp_perout_request *perout_request)
{
struct lan743x_ptp *ptp = &adapter->ptp;
u32 period_sec, period_nsec;
u32 start_sec, start_nsec;
u32 pulse_sec, pulse_nsec;
int pulse_width;
int perout_pin;
int event_ch;
u32 gen_cfg;
u32 index;
int val;
index = perout_request->index;
event_ch = ptp->ptp_io_perout[index];
if (on) {
perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, index);
if (perout_pin < 0)
return -EBUSY;
} else {
lan743x_ptp_io_perout_off(adapter, index);
return 0;
}
if (event_ch >= LAN743X_PTP_N_EVENT_CHAN) {
/* already on, turn off first */
lan743x_ptp_io_perout_off(adapter, index);
}
event_ch = lan743x_ptp_reserve_event_ch(adapter, index);
if (event_ch < 0) {
netif_warn(adapter, drv, adapter->netdev,
"Failed to reserve event channel %d for PEROUT\n",
index);
goto failed;
}
ptp->ptp_io_perout[index] = event_ch;
if (perout_request->flags & PTP_PEROUT_DUTY_CYCLE) {
pulse_sec = perout_request->on.sec;
pulse_sec += perout_request->on.nsec / 1000000000;
pulse_nsec = perout_request->on.nsec % 1000000000;
} else {
pulse_sec = perout_request->period.sec;
pulse_sec += perout_request->period.nsec / 1000000000;
pulse_nsec = perout_request->period.nsec % 1000000000;
}
if (pulse_sec == 0) {
if (pulse_nsec >= 400000000) {
pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
} else if (pulse_nsec >= 200000000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100MS_;
} else if (pulse_nsec >= 100000000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50MS_;
} else if (pulse_nsec >= 20000000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
} else if (pulse_nsec >= 10000000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5MS_;
} else if (pulse_nsec >= 2000000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
} else if (pulse_nsec >= 1000000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500US_;
} else if (pulse_nsec >= 200000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
} else if (pulse_nsec >= 100000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50US_;
} else if (pulse_nsec >= 20000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
} else if (pulse_nsec >= 10000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5US_;
} else if (pulse_nsec >= 2000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1US_;
} else if (pulse_nsec >= 1000) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500NS_;
} else if (pulse_nsec >= 200) {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
} else {
netif_warn(adapter, drv, adapter->netdev,
"perout period too small, min is 200nS\n");
goto failed;
}
} else {
pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
}
/* turn off by setting target far in future */
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_SEC_X(event_ch),
0xFFFF0000);
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_NS_X(event_ch), 0);
/* Configure to pulse every period */
gen_cfg = lan743x_csr_read(adapter, HS_PTP_GENERAL_CONFIG);
gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_(event_ch));
gen_cfg |= HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
(event_ch, pulse_width);
gen_cfg |= HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(event_ch);
gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(event_ch));
lan743x_csr_write(adapter, HS_PTP_GENERAL_CONFIG, gen_cfg);
/* set the reload to one toggle cycle */
period_sec = perout_request->period.sec;
period_sec += perout_request->period.nsec / 1000000000;
period_nsec = perout_request->period.nsec % 1000000000;
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_RELOAD_SEC_X(event_ch),
period_sec);
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_RELOAD_NS_X(event_ch),
period_nsec);
start_sec = perout_request->start.sec;
start_sec += perout_request->start.nsec / 1000000000;
start_nsec = perout_request->start.nsec % 1000000000;
/* set the start time */
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_SEC_X(event_ch),
start_sec);
lan743x_csr_write(adapter,
PTP_CLOCK_TARGET_NS_X(event_ch),
start_nsec);
/* Enable LTC Target Read */
val = lan743x_csr_read(adapter, PTP_CMD_CTL);
val |= PTP_CMD_CTL_PTP_LTC_TARGET_READ_;
lan743x_csr_write(adapter, PTP_CMD_CTL, val);
/* Configure as an push/pull driver */
val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
val |= PTP_IO_PIN_CFG_OBUF_TYPE_(perout_pin);
lan743x_csr_write(adapter, PTP_IO_PIN_CFG, val);
/* Select Event output */
val = lan743x_csr_read(adapter, PTP_IO_EVENT_OUTPUT_CFG);
if (event_ch)
/* Channel B as the output */
val |= PTP_IO_EVENT_OUTPUT_CFG_SEL_(perout_pin);
else
/* Channel A as the output */
val &= ~PTP_IO_EVENT_OUTPUT_CFG_SEL_(perout_pin);
/* Enables the output of Local Time Target compare events */
val |= PTP_IO_EVENT_OUTPUT_CFG_EN_(perout_pin);
lan743x_csr_write(adapter, PTP_IO_EVENT_OUTPUT_CFG, val);
return 0;
failed:
lan743x_ptp_io_perout_off(adapter, index);
return -ENODEV;
}
static void lan743x_ptp_io_extts_off(struct lan743x_adapter *adapter,
u32 index)
{
struct lan743x_ptp *ptp = &adapter->ptp;
struct lan743x_extts *extts;
int val;
extts = &ptp->extts[index];
/* PTP Interrupt Enable Clear Register */
if (extts->flags & PTP_FALLING_EDGE)
val = PTP_INT_EN_FE_EN_CLR_(index);
else
val = PTP_INT_EN_RE_EN_CLR_(index);
lan743x_csr_write(adapter, PTP_INT_EN_CLR, val);
/* Disables PTP-IO edge lock */
val = lan743x_csr_read(adapter, PTP_IO_CAP_CONFIG);
if (extts->flags & PTP_FALLING_EDGE) {
val &= ~PTP_IO_CAP_CONFIG_LOCK_FE_(index);
val &= ~PTP_IO_CAP_CONFIG_FE_CAP_EN_(index);
} else {
val &= ~PTP_IO_CAP_CONFIG_LOCK_RE_(index);
val &= ~PTP_IO_CAP_CONFIG_RE_CAP_EN_(index);
}
lan743x_csr_write(adapter, PTP_IO_CAP_CONFIG, val);
/* PTP-IO De-select register */
val = lan743x_csr_read(adapter, PTP_IO_SEL);
val &= ~PTP_IO_SEL_MASK_;
lan743x_csr_write(adapter, PTP_IO_SEL, val);
/* Clear timestamp */
memset(&extts->ts, 0, sizeof(struct timespec64));
extts->flags = 0;
}
static int lan743x_ptp_io_event_cap_en(struct lan743x_adapter *adapter,
u32 flags, u32 channel)
{
struct lan743x_ptp *ptp = &adapter->ptp;
int val;
if ((flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES)
return -EOPNOTSUPP;
mutex_lock(&ptp->command_lock);
/* PTP-IO Event Capture Enable */
val = lan743x_csr_read(adapter, PTP_IO_CAP_CONFIG);
if (flags & PTP_FALLING_EDGE) {
val &= ~PTP_IO_CAP_CONFIG_LOCK_RE_(channel);
val &= ~PTP_IO_CAP_CONFIG_RE_CAP_EN_(channel);
val |= PTP_IO_CAP_CONFIG_LOCK_FE_(channel);
val |= PTP_IO_CAP_CONFIG_FE_CAP_EN_(channel);
} else {
/* Rising eventing as Default */
val &= ~PTP_IO_CAP_CONFIG_LOCK_FE_(channel);
val &= ~PTP_IO_CAP_CONFIG_FE_CAP_EN_(channel);
val |= PTP_IO_CAP_CONFIG_LOCK_RE_(channel);
val |= PTP_IO_CAP_CONFIG_RE_CAP_EN_(channel);
}
lan743x_csr_write(adapter, PTP_IO_CAP_CONFIG, val);
/* PTP-IO Select */
val = lan743x_csr_read(adapter, PTP_IO_SEL);
val &= ~PTP_IO_SEL_MASK_;
val |= channel << PTP_IO_SEL_SHIFT_;
lan743x_csr_write(adapter, PTP_IO_SEL, val);
/* PTP Interrupt Enable Register */
if (flags & PTP_FALLING_EDGE)
val = PTP_INT_EN_FE_EN_SET_(channel);
else
val = PTP_INT_EN_RE_EN_SET_(channel);
lan743x_csr_write(adapter, PTP_INT_EN_SET, val);
mutex_unlock(&ptp->command_lock);
return 0;
}
static int lan743x_ptp_io_extts(struct lan743x_adapter *adapter, int on,
struct ptp_extts_request *extts_request)
{
struct lan743x_ptp *ptp = &adapter->ptp;
u32 flags = extts_request->flags;
u32 index = extts_request->index;
struct lan743x_extts *extts;
int extts_pin;
int ret = 0;
extts = &ptp->extts[index];
if (on) {
extts_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_EXTTS, index);
if (extts_pin < 0)
return -EBUSY;
ret = lan743x_ptp_io_event_cap_en(adapter, flags, index);
if (!ret)
extts->flags = flags;
} else {
lan743x_ptp_io_extts_off(adapter, index);
}
return ret;
}
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:
if (request->extts.index < ptpci->n_ext_ts)
return lan743x_ptp_io_extts(adapter, on,
&request->extts);
return -EINVAL;
case PTP_CLK_REQ_PEROUT:
if (request->perout.index < ptpci->n_per_out) {
if (adapter->is_pci11x1x)
return lan743x_ptp_io_perout(adapter, on,
&request->perout);
else
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 int lan743x_ptpci_verify_pin_config(struct ptp_clock_info *ptp,
unsigned int pin,
enum ptp_pin_function func,
unsigned int chan)
{
struct lan743x_ptp *lan_ptp =
container_of(ptp, struct lan743x_ptp, ptp_clock_info);
struct lan743x_adapter *adapter =
container_of(lan_ptp, struct lan743x_adapter, ptp);
int result = 0;
/* Confirm the requested function is supported. Parameter
* validation is done by the caller.
*/
switch (func) {
case PTP_PF_NONE:
case PTP_PF_PEROUT:
break;
case PTP_PF_EXTTS:
if (!adapter->is_pci11x1x)
result = -1;
break;
case PTP_PF_PHYSYNC:
default:
result = -1;
break;
}
return result;
}
static void lan743x_ptp_io_event_clock_get(struct lan743x_adapter *adapter,
bool fe, u8 channel,
struct timespec64 *ts)
{
struct lan743x_ptp *ptp = &adapter->ptp;
struct lan743x_extts *extts;
u32 sec, nsec;
mutex_lock(&ptp->command_lock);
if (fe) {
sec = lan743x_csr_read(adapter, PTP_IO_FE_LTC_SEC_CAP_X);
nsec = lan743x_csr_read(adapter, PTP_IO_FE_LTC_NS_CAP_X);
} else {
sec = lan743x_csr_read(adapter, PTP_IO_RE_LTC_SEC_CAP_X);
nsec = lan743x_csr_read(adapter, PTP_IO_RE_LTC_NS_CAP_X);
}
mutex_unlock(&ptp->command_lock);
/* Update Local timestamp */
extts = &ptp->extts[channel];
extts->ts.tv_sec = sec;
extts->ts.tv_nsec = nsec;
ts->tv_sec = sec;
ts->tv_nsec = nsec;
}
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;
struct ptp_clock_event ptp_event;
struct timespec64 ts;
int ptp_int_sts;
int count = 0;
int channel;
s64 ns;
ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
while ((count < 100) && ptp_int_sts) {
count++;
if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
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 (ptp_int_sts & PTP_INT_IO_FE_MASK_) {
do {
channel = lan743x_get_channel((ptp_int_sts &
PTP_INT_IO_FE_MASK_) >>
PTP_INT_IO_FE_SHIFT_);
if (channel >= 0 &&
channel < PCI11X1X_PTP_IO_MAX_CHANNELS) {
lan743x_ptp_io_event_clock_get(adapter,
true,
channel,
&ts);
/* PTP Falling Event post */
ns = timespec64_to_ns(&ts);
ptp_event.timestamp = ns;
ptp_event.index = channel;
ptp_event.type = PTP_CLOCK_EXTTS;
ptp_clock_event(ptp->ptp_clock,
&ptp_event);
lan743x_csr_write(adapter, PTP_INT_STS,
PTP_INT_IO_FE_SET_
(channel));
ptp_int_sts &= ~(1 <<
(PTP_INT_IO_FE_SHIFT_ +
channel));
} else {
/* Clear falling event interrupts */
lan743x_csr_write(adapter, PTP_INT_STS,
PTP_INT_IO_FE_MASK_);
ptp_int_sts &= ~PTP_INT_IO_FE_MASK_;
}
} while (ptp_int_sts & PTP_INT_IO_FE_MASK_);
}
if (ptp_int_sts & PTP_INT_IO_RE_MASK_) {
do {
channel = lan743x_get_channel((ptp_int_sts &
PTP_INT_IO_RE_MASK_) >>
PTP_INT_IO_RE_SHIFT_);
if (channel >= 0 &&
channel < PCI11X1X_PTP_IO_MAX_CHANNELS) {
lan743x_ptp_io_event_clock_get(adapter,
false,
channel,
&ts);
/* PTP Rising Event post */
ns = timespec64_to_ns(&ts);
ptp_event.timestamp = ns;
ptp_event.index = channel;
ptp_event.type = PTP_CLOCK_EXTTS;
ptp_clock_event(ptp->ptp_clock,
&ptp_event);
lan743x_csr_write(adapter, PTP_INT_STS,
PTP_INT_IO_RE_SET_
(channel));
ptp_int_sts &= ~(1 <<
(PTP_INT_IO_RE_SHIFT_ +
channel));
} else {
/* Clear Rising event interrupt */
lan743x_csr_write(adapter, PTP_INT_STS,
PTP_INT_IO_RE_MASK_);
ptp_int_sts &= ~PTP_INT_IO_RE_MASK_;
}
} while (ptp_int_sts & PTP_INT_IO_RE_MASK_);
}
ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
}
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_io_clock_get(struct lan743x_adapter *adapter,
u32 *sec, u32 *nsec, u32 *sub_nsec)
{
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 (sec)
(*sec) = lan743x_csr_read(adapter, PTP_LTC_RD_SEC_LO);
if (nsec)
(*nsec) = lan743x_csr_read(adapter, PTP_LTC_RD_NS);
if (sub_nsec)
(*sub_nsec) =
lan743x_csr_read(adapter, PTP_LTC_RD_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 */
if (adapter->is_pci11x1x)
lan743x_ptp_io_clock_get(adapter, &unsigned_seconds,
&nano_seconds, NULL);
else
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;
if (adapter->is_pci11x1x) {
lan743x_ptp_io_clock_get(adapter, &unsigned_seconds,
&nano_seconds, NULL);
} else {
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;
ktime_get_clocktai_ts64(&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;
int i;
mutex_init(&ptp->command_lock);
spin_lock_init(&ptp->tx_ts_lock);
ptp->used_event_ch = 0;
for (i = 0; i < LAN743X_PTP_N_EVENT_CHAN; i++) {
ptp->perout[i].event_ch = -1;
ptp->perout[i].gpio_pin = -1;
}
lan743x_led_mux_save(adapter);
return 0;
}
int lan743x_ptp_open(struct lan743x_adapter *adapter)
{
struct lan743x_ptp *ptp = &adapter->ptp;
int ret = -ENODEV;
u32 temp;
int i;
int n_pins;
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;
switch (adapter->csr.id_rev & ID_REV_ID_MASK_) {
case ID_REV_ID_LAN7430_:
n_pins = LAN7430_N_GPIO;
break;
case ID_REV_ID_LAN7431_:
case ID_REV_ID_A011_:
case ID_REV_ID_A041_:
n_pins = LAN7431_N_GPIO;
break;
default:
netif_warn(adapter, drv, adapter->netdev,
"Unknown LAN743x (%08x). Assuming no GPIO\n",
adapter->csr.id_rev);
n_pins = 0;
break;
}
if (n_pins > LAN743X_PTP_N_GPIO)
n_pins = LAN743X_PTP_N_GPIO;
for (i = 0; i < n_pins; i++) {
struct ptp_pin_desc *ptp_pin = &ptp->pin_config[i];
snprintf(ptp_pin->name,
sizeof(ptp_pin->name), "lan743x_ptp_pin_%02d", i);
ptp_pin->index = i;
ptp_pin->func = PTP_PF_NONE;
}
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 = LAN743X_PTP_N_EXTTS;
ptp->ptp_clock_info.n_per_out = LAN743X_PTP_N_EVENT_CHAN;
ptp->ptp_clock_info.n_pins = n_pins;
ptp->ptp_clock_info.pps = LAN743X_PTP_N_PPS;
ptp->ptp_clock_info.pin_config = ptp->pin_config;
ptp->ptp_clock_info.adjfine = lan743x_ptpci_adjfine;
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 = lan743x_ptpci_verify_pin_config;
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];
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_led_mux_restore(adapter);
lan743x_ptp_disable(adapter);
}
static 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;
switch (config.tx_type) {
case HWTSTAMP_TX_OFF:
for (index = 0; index < adapter->used_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 < adapter->used_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 < adapter->used_tx_channels;
index++)
lan743x_tx_set_timestamping_mode(&adapter->tx[index],
true, true);
lan743x_ptp_set_sync_ts_insert(adapter, true);
break;
case HWTSTAMP_TX_ONESTEP_P2P:
ret = -ERANGE;
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;
}