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linux/drivers/ptp/ptp_clockmatrix.c
Uwe Kleine-König 32080ec2db ptp: ptp_clockmatrix: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Link: https://lore.kernel.org/r/0f0f5680c1a2a3ef19975935a2c6828a98bc4d25.1712734365.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-04-12 18:51:39 -07:00

2478 lines
55 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* PTP hardware clock driver for the IDT ClockMatrix(TM) family of timing and
* synchronization devices.
*
* Copyright (C) 2019 Integrated Device Technology, Inc., a Renesas Company.
*/
#include <linux/firmware.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/delay.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/timekeeping.h>
#include <linux/string.h>
#include <linux/of.h>
#include <linux/mfd/rsmu.h>
#include <linux/mfd/idt8a340_reg.h>
#include <asm/unaligned.h>
#include "ptp_private.h"
#include "ptp_clockmatrix.h"
MODULE_DESCRIPTION("Driver for IDT ClockMatrix(TM) family");
MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
MODULE_AUTHOR("IDT support-1588 <IDT-support-1588@lm.renesas.com>");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");
/*
* The name of the firmware file to be loaded
* over-rides any automatic selection
*/
static char *firmware;
module_param(firmware, charp, 0);
#define SETTIME_CORRECTION (0)
#define EXTTS_PERIOD_MS (95)
static int _idtcm_adjfine(struct idtcm_channel *channel, long scaled_ppm);
static inline int idtcm_read(struct idtcm *idtcm,
u16 module,
u16 regaddr,
u8 *buf,
u16 count)
{
return regmap_bulk_read(idtcm->regmap, module + regaddr, buf, count);
}
static inline int idtcm_write(struct idtcm *idtcm,
u16 module,
u16 regaddr,
u8 *buf,
u16 count)
{
return regmap_bulk_write(idtcm->regmap, module + regaddr, buf, count);
}
static int contains_full_configuration(struct idtcm *idtcm,
const struct firmware *fw)
{
struct idtcm_fwrc *rec = (struct idtcm_fwrc *)fw->data;
u16 scratch = IDTCM_FW_REG(idtcm->fw_ver, V520, SCRATCH);
s32 full_count;
s32 count = 0;
u16 regaddr;
u8 loaddr;
s32 len;
/* 4 bytes skipped every 0x80 */
full_count = (scratch - GPIO_USER_CONTROL) -
((scratch >> 7) - (GPIO_USER_CONTROL >> 7)) * 4;
/* If the firmware contains 'full configuration' SM_RESET can be used
* to ensure proper configuration.
*
* Full configuration is defined as the number of programmable
* bytes within the configuration range minus page offset addr range.
*/
for (len = fw->size; len > 0; len -= sizeof(*rec)) {
regaddr = rec->hiaddr << 8;
regaddr |= rec->loaddr;
loaddr = rec->loaddr;
rec++;
/* Top (status registers) and bottom are read-only */
if (regaddr < GPIO_USER_CONTROL || regaddr >= scratch)
continue;
/* Page size 128, last 4 bytes of page skipped */
if ((loaddr > 0x7b && loaddr <= 0x7f) || loaddr > 0xfb)
continue;
count++;
}
return (count >= full_count);
}
static int char_array_to_timespec(u8 *buf,
u8 count,
struct timespec64 *ts)
{
u8 i;
u64 nsec;
time64_t sec;
if (count < TOD_BYTE_COUNT)
return 1;
/* Sub-nanoseconds are in buf[0]. */
nsec = buf[4];
for (i = 0; i < 3; i++) {
nsec <<= 8;
nsec |= buf[3 - i];
}
sec = buf[10];
for (i = 0; i < 5; i++) {
sec <<= 8;
sec |= buf[9 - i];
}
ts->tv_sec = sec;
ts->tv_nsec = nsec;
return 0;
}
static int timespec_to_char_array(struct timespec64 const *ts,
u8 *buf,
u8 count)
{
u8 i;
s32 nsec;
time64_t sec;
if (count < TOD_BYTE_COUNT)
return 1;
nsec = ts->tv_nsec;
sec = ts->tv_sec;
/* Sub-nanoseconds are in buf[0]. */
buf[0] = 0;
for (i = 1; i < 5; i++) {
buf[i] = nsec & 0xff;
nsec >>= 8;
}
for (i = 5; i < TOD_BYTE_COUNT; i++) {
buf[i] = sec & 0xff;
sec >>= 8;
}
return 0;
}
static int idtcm_strverscmp(const char *version1, const char *version2)
{
u8 ver1[3], ver2[3];
int i;
if (sscanf(version1, "%hhu.%hhu.%hhu",
&ver1[0], &ver1[1], &ver1[2]) != 3)
return -1;
if (sscanf(version2, "%hhu.%hhu.%hhu",
&ver2[0], &ver2[1], &ver2[2]) != 3)
return -1;
for (i = 0; i < 3; i++) {
if (ver1[i] > ver2[i])
return 1;
if (ver1[i] < ver2[i])
return -1;
}
return 0;
}
static enum fw_version idtcm_fw_version(const char *version)
{
enum fw_version ver = V_DEFAULT;
if (idtcm_strverscmp(version, "4.8.7") >= 0)
ver = V487;
if (idtcm_strverscmp(version, "5.2.0") >= 0)
ver = V520;
return ver;
}
static int clear_boot_status(struct idtcm *idtcm)
{
u8 buf[4] = {0};
return idtcm_write(idtcm, GENERAL_STATUS, BOOT_STATUS, buf, sizeof(buf));
}
static int read_boot_status(struct idtcm *idtcm, u32 *status)
{
int err;
u8 buf[4] = {0};
err = idtcm_read(idtcm, GENERAL_STATUS, BOOT_STATUS, buf, sizeof(buf));
*status = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
return err;
}
static int wait_for_boot_status_ready(struct idtcm *idtcm)
{
u32 status = 0;
u8 i = 30; /* 30 * 100ms = 3s */
int err;
do {
err = read_boot_status(idtcm, &status);
if (err)
return err;
if (status == 0xA0)
return 0;
msleep(100);
i--;
} while (i);
dev_warn(idtcm->dev, "%s timed out", __func__);
return -EBUSY;
}
static int arm_tod_read_trig_sel_refclk(struct idtcm_channel *channel, u8 ref)
{
struct idtcm *idtcm = channel->idtcm;
u16 tod_read_cmd = IDTCM_FW_REG(idtcm->fw_ver, V520, TOD_READ_SECONDARY_CMD);
u8 val = 0;
int err;
val &= ~(WR_REF_INDEX_MASK << WR_REF_INDEX_SHIFT);
val |= (ref << WR_REF_INDEX_SHIFT);
err = idtcm_write(idtcm, channel->tod_read_secondary,
TOD_READ_SECONDARY_SEL_CFG_0, &val, sizeof(val));
if (err)
return err;
val = 0 | (SCSR_TOD_READ_TRIG_SEL_REFCLK << TOD_READ_TRIGGER_SHIFT);
err = idtcm_write(idtcm, channel->tod_read_secondary, tod_read_cmd,
&val, sizeof(val));
if (err)
dev_err(idtcm->dev, "%s: err = %d", __func__, err);
return err;
}
static bool is_single_shot(u8 mask)
{
/* Treat single bit ToD masks as continuous trigger */
return !(mask <= 8 && is_power_of_2(mask));
}
static int idtcm_extts_enable(struct idtcm_channel *channel,
struct ptp_clock_request *rq, int on)
{
u8 index = rq->extts.index;
struct idtcm *idtcm;
u8 mask = 1 << index;
int err = 0;
u8 old_mask;
int ref;
idtcm = channel->idtcm;
old_mask = idtcm->extts_mask;
/* Reject requests with unsupported flags */
if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
PTP_RISING_EDGE |
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
/* Reject requests to enable time stamping on falling edge */
if ((rq->extts.flags & PTP_ENABLE_FEATURE) &&
(rq->extts.flags & PTP_FALLING_EDGE))
return -EOPNOTSUPP;
if (index >= MAX_TOD)
return -EINVAL;
if (on) {
/* Support triggering more than one TOD_0/1/2/3 by same pin */
/* Use the pin configured for the channel */
ref = ptp_find_pin(channel->ptp_clock, PTP_PF_EXTTS, channel->tod);
if (ref < 0) {
dev_err(idtcm->dev, "%s: No valid pin found for TOD%d!\n",
__func__, channel->tod);
return -EBUSY;
}
err = arm_tod_read_trig_sel_refclk(&idtcm->channel[index], ref);
if (err == 0) {
idtcm->extts_mask |= mask;
idtcm->event_channel[index] = channel;
idtcm->channel[index].refn = ref;
idtcm->extts_single_shot = is_single_shot(idtcm->extts_mask);
if (old_mask)
return 0;
schedule_delayed_work(&idtcm->extts_work,
msecs_to_jiffies(EXTTS_PERIOD_MS));
}
} else {
idtcm->extts_mask &= ~mask;
idtcm->extts_single_shot = is_single_shot(idtcm->extts_mask);
if (idtcm->extts_mask == 0)
cancel_delayed_work(&idtcm->extts_work);
}
return err;
}
static int read_sys_apll_status(struct idtcm *idtcm, u8 *status)
{
return idtcm_read(idtcm, STATUS, DPLL_SYS_APLL_STATUS, status,
sizeof(u8));
}
static int read_sys_dpll_status(struct idtcm *idtcm, u8 *status)
{
return idtcm_read(idtcm, STATUS, DPLL_SYS_STATUS, status, sizeof(u8));
}
static int wait_for_sys_apll_dpll_lock(struct idtcm *idtcm)
{
unsigned long timeout = jiffies + msecs_to_jiffies(LOCK_TIMEOUT_MS);
u8 apll = 0;
u8 dpll = 0;
int err;
do {
err = read_sys_apll_status(idtcm, &apll);
if (err)
return err;
err = read_sys_dpll_status(idtcm, &dpll);
if (err)
return err;
apll &= SYS_APLL_LOSS_LOCK_LIVE_MASK;
dpll &= DPLL_SYS_STATE_MASK;
if (apll == SYS_APLL_LOSS_LOCK_LIVE_LOCKED &&
dpll == DPLL_STATE_LOCKED) {
return 0;
} else if (dpll == DPLL_STATE_FREERUN ||
dpll == DPLL_STATE_HOLDOVER ||
dpll == DPLL_STATE_OPEN_LOOP) {
dev_warn(idtcm->dev,
"No wait state: DPLL_SYS_STATE %d", dpll);
return -EPERM;
}
msleep(LOCK_POLL_INTERVAL_MS);
} while (time_is_after_jiffies(timeout));
dev_warn(idtcm->dev,
"%d ms lock timeout: SYS APLL Loss Lock %d SYS DPLL state %d",
LOCK_TIMEOUT_MS, apll, dpll);
return -ETIME;
}
static void wait_for_chip_ready(struct idtcm *idtcm)
{
if (wait_for_boot_status_ready(idtcm))
dev_warn(idtcm->dev, "BOOT_STATUS != 0xA0");
if (wait_for_sys_apll_dpll_lock(idtcm))
dev_warn(idtcm->dev,
"Continuing while SYS APLL/DPLL is not locked");
}
static int _idtcm_gettime_triggered(struct idtcm_channel *channel,
struct timespec64 *ts)
{
struct idtcm *idtcm = channel->idtcm;
u16 tod_read_cmd = IDTCM_FW_REG(idtcm->fw_ver, V520, TOD_READ_SECONDARY_CMD);
u8 buf[TOD_BYTE_COUNT];
u8 trigger;
int err;
err = idtcm_read(idtcm, channel->tod_read_secondary,
tod_read_cmd, &trigger, sizeof(trigger));
if (err)
return err;
if (trigger & TOD_READ_TRIGGER_MASK)
return -EBUSY;
err = idtcm_read(idtcm, channel->tod_read_secondary,
TOD_READ_SECONDARY_BASE, buf, sizeof(buf));
if (err)
return err;
return char_array_to_timespec(buf, sizeof(buf), ts);
}
static int _idtcm_gettime(struct idtcm_channel *channel,
struct timespec64 *ts, u8 timeout)
{
struct idtcm *idtcm = channel->idtcm;
u16 tod_read_cmd = IDTCM_FW_REG(idtcm->fw_ver, V520, TOD_READ_PRIMARY_CMD);
u8 buf[TOD_BYTE_COUNT];
u8 trigger;
int err;
/* wait trigger to be 0 */
do {
if (timeout-- == 0)
return -EIO;
if (idtcm->calculate_overhead_flag)
idtcm->start_time = ktime_get_raw();
err = idtcm_read(idtcm, channel->tod_read_primary,
tod_read_cmd, &trigger,
sizeof(trigger));
if (err)
return err;
} while (trigger & TOD_READ_TRIGGER_MASK);
err = idtcm_read(idtcm, channel->tod_read_primary,
TOD_READ_PRIMARY_BASE, buf, sizeof(buf));
if (err)
return err;
err = char_array_to_timespec(buf, sizeof(buf), ts);
return err;
}
static int idtcm_extts_check_channel(struct idtcm *idtcm, u8 todn)
{
struct idtcm_channel *ptp_channel, *extts_channel;
struct ptp_clock_event event;
struct timespec64 ts;
u32 dco_delay = 0;
int err;
extts_channel = &idtcm->channel[todn];
ptp_channel = idtcm->event_channel[todn];
if (extts_channel == ptp_channel)
dco_delay = ptp_channel->dco_delay;
err = _idtcm_gettime_triggered(extts_channel, &ts);
if (err)
return err;
/* Triggered - save timestamp */
event.type = PTP_CLOCK_EXTTS;
event.index = todn;
event.timestamp = timespec64_to_ns(&ts) - dco_delay;
ptp_clock_event(ptp_channel->ptp_clock, &event);
return err;
}
static int _idtcm_gettime_immediate(struct idtcm_channel *channel,
struct timespec64 *ts)
{
struct idtcm *idtcm = channel->idtcm;
u16 tod_read_cmd = IDTCM_FW_REG(idtcm->fw_ver, V520, TOD_READ_PRIMARY_CMD);
u8 val = (SCSR_TOD_READ_TRIG_SEL_IMMEDIATE << TOD_READ_TRIGGER_SHIFT);
int err;
err = idtcm_write(idtcm, channel->tod_read_primary,
tod_read_cmd, &val, sizeof(val));
if (err)
return err;
return _idtcm_gettime(channel, ts, 10);
}
static int _sync_pll_output(struct idtcm *idtcm,
u8 pll,
u8 sync_src,
u8 qn,
u8 qn_plus_1)
{
int err;
u8 val;
u16 sync_ctrl0;
u16 sync_ctrl1;
u8 temp;
if (qn == 0 && qn_plus_1 == 0)
return 0;
switch (pll) {
case 0:
sync_ctrl0 = HW_Q0_Q1_CH_SYNC_CTRL_0;
sync_ctrl1 = HW_Q0_Q1_CH_SYNC_CTRL_1;
break;
case 1:
sync_ctrl0 = HW_Q2_Q3_CH_SYNC_CTRL_0;
sync_ctrl1 = HW_Q2_Q3_CH_SYNC_CTRL_1;
break;
case 2:
sync_ctrl0 = HW_Q4_Q5_CH_SYNC_CTRL_0;
sync_ctrl1 = HW_Q4_Q5_CH_SYNC_CTRL_1;
break;
case 3:
sync_ctrl0 = HW_Q6_Q7_CH_SYNC_CTRL_0;
sync_ctrl1 = HW_Q6_Q7_CH_SYNC_CTRL_1;
break;
case 4:
sync_ctrl0 = HW_Q8_CH_SYNC_CTRL_0;
sync_ctrl1 = HW_Q8_CH_SYNC_CTRL_1;
break;
case 5:
sync_ctrl0 = HW_Q9_CH_SYNC_CTRL_0;
sync_ctrl1 = HW_Q9_CH_SYNC_CTRL_1;
break;
case 6:
sync_ctrl0 = HW_Q10_CH_SYNC_CTRL_0;
sync_ctrl1 = HW_Q10_CH_SYNC_CTRL_1;
break;
case 7:
sync_ctrl0 = HW_Q11_CH_SYNC_CTRL_0;
sync_ctrl1 = HW_Q11_CH_SYNC_CTRL_1;
break;
default:
return -EINVAL;
}
val = SYNCTRL1_MASTER_SYNC_RST;
/* Place master sync in reset */
err = idtcm_write(idtcm, 0, sync_ctrl1, &val, sizeof(val));
if (err)
return err;
err = idtcm_write(idtcm, 0, sync_ctrl0, &sync_src, sizeof(sync_src));
if (err)
return err;
/* Set sync trigger mask */
val |= SYNCTRL1_FBDIV_FRAME_SYNC_TRIG | SYNCTRL1_FBDIV_SYNC_TRIG;
if (qn)
val |= SYNCTRL1_Q0_DIV_SYNC_TRIG;
if (qn_plus_1)
val |= SYNCTRL1_Q1_DIV_SYNC_TRIG;
err = idtcm_write(idtcm, 0, sync_ctrl1, &val, sizeof(val));
if (err)
return err;
/* PLL5 can have OUT8 as second additional output. */
if (pll == 5 && qn_plus_1 != 0) {
err = idtcm_read(idtcm, 0, HW_Q8_CTRL_SPARE,
&temp, sizeof(temp));
if (err)
return err;
temp &= ~(Q9_TO_Q8_SYNC_TRIG);
err = idtcm_write(idtcm, 0, HW_Q8_CTRL_SPARE,
&temp, sizeof(temp));
if (err)
return err;
temp |= Q9_TO_Q8_SYNC_TRIG;
err = idtcm_write(idtcm, 0, HW_Q8_CTRL_SPARE,
&temp, sizeof(temp));
if (err)
return err;
}
/* PLL6 can have OUT11 as second additional output. */
if (pll == 6 && qn_plus_1 != 0) {
err = idtcm_read(idtcm, 0, HW_Q11_CTRL_SPARE,
&temp, sizeof(temp));
if (err)
return err;
temp &= ~(Q10_TO_Q11_SYNC_TRIG);
err = idtcm_write(idtcm, 0, HW_Q11_CTRL_SPARE,
&temp, sizeof(temp));
if (err)
return err;
temp |= Q10_TO_Q11_SYNC_TRIG;
err = idtcm_write(idtcm, 0, HW_Q11_CTRL_SPARE,
&temp, sizeof(temp));
if (err)
return err;
}
/* Place master sync out of reset */
val &= ~(SYNCTRL1_MASTER_SYNC_RST);
err = idtcm_write(idtcm, 0, sync_ctrl1, &val, sizeof(val));
return err;
}
static int idtcm_sync_pps_output(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
u8 pll;
u8 qn;
u8 qn_plus_1;
int err = 0;
u8 out8_mux = 0;
u8 out11_mux = 0;
u8 temp;
u16 output_mask = channel->output_mask;
err = idtcm_read(idtcm, 0, HW_Q8_CTRL_SPARE,
&temp, sizeof(temp));
if (err)
return err;
if ((temp & Q9_TO_Q8_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK) ==
Q9_TO_Q8_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK)
out8_mux = 1;
err = idtcm_read(idtcm, 0, HW_Q11_CTRL_SPARE,
&temp, sizeof(temp));
if (err)
return err;
if ((temp & Q10_TO_Q11_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK) ==
Q10_TO_Q11_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK)
out11_mux = 1;
for (pll = 0; pll < 8; pll++) {
qn = 0;
qn_plus_1 = 0;
if (pll < 4) {
/* First 4 pll has 2 outputs */
qn = output_mask & 0x1;
output_mask = output_mask >> 1;
qn_plus_1 = output_mask & 0x1;
output_mask = output_mask >> 1;
} else if (pll == 4) {
if (out8_mux == 0) {
qn = output_mask & 0x1;
output_mask = output_mask >> 1;
}
} else if (pll == 5) {
if (out8_mux) {
qn_plus_1 = output_mask & 0x1;
output_mask = output_mask >> 1;
}
qn = output_mask & 0x1;
output_mask = output_mask >> 1;
} else if (pll == 6) {
qn = output_mask & 0x1;
output_mask = output_mask >> 1;
if (out11_mux) {
qn_plus_1 = output_mask & 0x1;
output_mask = output_mask >> 1;
}
} else if (pll == 7) {
if (out11_mux == 0) {
qn = output_mask & 0x1;
output_mask = output_mask >> 1;
}
}
if (qn != 0 || qn_plus_1 != 0)
err = _sync_pll_output(idtcm, pll, channel->sync_src,
qn, qn_plus_1);
if (err)
return err;
}
return err;
}
static int _idtcm_set_dpll_hw_tod(struct idtcm_channel *channel,
struct timespec64 const *ts,
enum hw_tod_write_trig_sel wr_trig)
{
struct idtcm *idtcm = channel->idtcm;
u8 buf[TOD_BYTE_COUNT];
u8 cmd;
int err;
struct timespec64 local_ts = *ts;
s64 total_overhead_ns;
/* Configure HW TOD write trigger. */
err = idtcm_read(idtcm, channel->hw_dpll_n, HW_DPLL_TOD_CTRL_1,
&cmd, sizeof(cmd));
if (err)
return err;
cmd &= ~(0x0f);
cmd |= wr_trig | 0x08;
err = idtcm_write(idtcm, channel->hw_dpll_n, HW_DPLL_TOD_CTRL_1,
&cmd, sizeof(cmd));
if (err)
return err;
if (wr_trig != HW_TOD_WR_TRIG_SEL_MSB) {
err = timespec_to_char_array(&local_ts, buf, sizeof(buf));
if (err)
return err;
err = idtcm_write(idtcm, channel->hw_dpll_n,
HW_DPLL_TOD_OVR__0, buf, sizeof(buf));
if (err)
return err;
}
/* ARM HW TOD write trigger. */
cmd &= ~(0x08);
err = idtcm_write(idtcm, channel->hw_dpll_n, HW_DPLL_TOD_CTRL_1,
&cmd, sizeof(cmd));
if (wr_trig == HW_TOD_WR_TRIG_SEL_MSB) {
if (idtcm->calculate_overhead_flag) {
/* Assumption: I2C @ 400KHz */
ktime_t diff = ktime_sub(ktime_get_raw(),
idtcm->start_time);
total_overhead_ns = ktime_to_ns(diff)
+ idtcm->tod_write_overhead_ns
+ SETTIME_CORRECTION;
timespec64_add_ns(&local_ts, total_overhead_ns);
idtcm->calculate_overhead_flag = 0;
}
err = timespec_to_char_array(&local_ts, buf, sizeof(buf));
if (err)
return err;
err = idtcm_write(idtcm, channel->hw_dpll_n,
HW_DPLL_TOD_OVR__0, buf, sizeof(buf));
}
return err;
}
static int _idtcm_set_dpll_scsr_tod(struct idtcm_channel *channel,
struct timespec64 const *ts,
enum scsr_tod_write_trig_sel wr_trig,
enum scsr_tod_write_type_sel wr_type)
{
struct idtcm *idtcm = channel->idtcm;
unsigned char buf[TOD_BYTE_COUNT], cmd;
struct timespec64 local_ts = *ts;
int err, count = 0;
timespec64_add_ns(&local_ts, SETTIME_CORRECTION);
err = timespec_to_char_array(&local_ts, buf, sizeof(buf));
if (err)
return err;
err = idtcm_write(idtcm, channel->tod_write, TOD_WRITE,
buf, sizeof(buf));
if (err)
return err;
/* Trigger the write operation. */
err = idtcm_read(idtcm, channel->tod_write, TOD_WRITE_CMD,
&cmd, sizeof(cmd));
if (err)
return err;
cmd &= ~(TOD_WRITE_SELECTION_MASK << TOD_WRITE_SELECTION_SHIFT);
cmd &= ~(TOD_WRITE_TYPE_MASK << TOD_WRITE_TYPE_SHIFT);
cmd |= (wr_trig << TOD_WRITE_SELECTION_SHIFT);
cmd |= (wr_type << TOD_WRITE_TYPE_SHIFT);
err = idtcm_write(idtcm, channel->tod_write, TOD_WRITE_CMD,
&cmd, sizeof(cmd));
if (err)
return err;
/* Wait for the operation to complete. */
while (1) {
/* pps trigger takes up to 1 sec to complete */
if (wr_trig == SCSR_TOD_WR_TRIG_SEL_TODPPS)
msleep(50);
err = idtcm_read(idtcm, channel->tod_write, TOD_WRITE_CMD,
&cmd, sizeof(cmd));
if (err)
return err;
if ((cmd & TOD_WRITE_SELECTION_MASK) == 0)
break;
if (++count > 20) {
dev_err(idtcm->dev,
"Timed out waiting for the write counter");
return -EIO;
}
}
return 0;
}
static int get_output_base_addr(enum fw_version ver, u8 outn)
{
int base;
switch (outn) {
case 0:
base = IDTCM_FW_REG(ver, V520, OUTPUT_0);
break;
case 1:
base = IDTCM_FW_REG(ver, V520, OUTPUT_1);
break;
case 2:
base = IDTCM_FW_REG(ver, V520, OUTPUT_2);
break;
case 3:
base = IDTCM_FW_REG(ver, V520, OUTPUT_3);
break;
case 4:
base = IDTCM_FW_REG(ver, V520, OUTPUT_4);
break;
case 5:
base = IDTCM_FW_REG(ver, V520, OUTPUT_5);
break;
case 6:
base = IDTCM_FW_REG(ver, V520, OUTPUT_6);
break;
case 7:
base = IDTCM_FW_REG(ver, V520, OUTPUT_7);
break;
case 8:
base = IDTCM_FW_REG(ver, V520, OUTPUT_8);
break;
case 9:
base = IDTCM_FW_REG(ver, V520, OUTPUT_9);
break;
case 10:
base = IDTCM_FW_REG(ver, V520, OUTPUT_10);
break;
case 11:
base = IDTCM_FW_REG(ver, V520, OUTPUT_11);
break;
default:
base = -EINVAL;
}
return base;
}
static int _idtcm_settime_deprecated(struct idtcm_channel *channel,
struct timespec64 const *ts)
{
struct idtcm *idtcm = channel->idtcm;
int err;
err = _idtcm_set_dpll_hw_tod(channel, ts, HW_TOD_WR_TRIG_SEL_MSB);
if (err) {
dev_err(idtcm->dev,
"%s: Set HW ToD failed", __func__);
return err;
}
return idtcm_sync_pps_output(channel);
}
static int _idtcm_settime(struct idtcm_channel *channel,
struct timespec64 const *ts,
enum scsr_tod_write_type_sel wr_type)
{
return _idtcm_set_dpll_scsr_tod(channel, ts,
SCSR_TOD_WR_TRIG_SEL_IMMEDIATE,
wr_type);
}
static int idtcm_set_phase_pull_in_offset(struct idtcm_channel *channel,
s32 offset_ns)
{
int err;
int i;
struct idtcm *idtcm = channel->idtcm;
u8 buf[4];
for (i = 0; i < 4; i++) {
buf[i] = 0xff & (offset_ns);
offset_ns >>= 8;
}
err = idtcm_write(idtcm, channel->dpll_phase_pull_in, PULL_IN_OFFSET,
buf, sizeof(buf));
return err;
}
static int idtcm_set_phase_pull_in_slope_limit(struct idtcm_channel *channel,
u32 max_ffo_ppb)
{
int err;
u8 i;
struct idtcm *idtcm = channel->idtcm;
u8 buf[3];
if (max_ffo_ppb & 0xff000000)
max_ffo_ppb = 0;
for (i = 0; i < 3; i++) {
buf[i] = 0xff & (max_ffo_ppb);
max_ffo_ppb >>= 8;
}
err = idtcm_write(idtcm, channel->dpll_phase_pull_in,
PULL_IN_SLOPE_LIMIT, buf, sizeof(buf));
return err;
}
static int idtcm_start_phase_pull_in(struct idtcm_channel *channel)
{
int err;
struct idtcm *idtcm = channel->idtcm;
u8 buf;
err = idtcm_read(idtcm, channel->dpll_phase_pull_in, PULL_IN_CTRL,
&buf, sizeof(buf));
if (err)
return err;
if (buf == 0) {
buf = 0x01;
err = idtcm_write(idtcm, channel->dpll_phase_pull_in,
PULL_IN_CTRL, &buf, sizeof(buf));
} else {
err = -EBUSY;
}
return err;
}
static int do_phase_pull_in_fw(struct idtcm_channel *channel,
s32 offset_ns,
u32 max_ffo_ppb)
{
int err;
err = idtcm_set_phase_pull_in_offset(channel, -offset_ns);
if (err)
return err;
err = idtcm_set_phase_pull_in_slope_limit(channel, max_ffo_ppb);
if (err)
return err;
err = idtcm_start_phase_pull_in(channel);
return err;
}
static int set_tod_write_overhead(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
s64 current_ns = 0;
s64 lowest_ns = 0;
int err;
u8 i;
ktime_t start;
ktime_t stop;
ktime_t diff;
char buf[TOD_BYTE_COUNT] = {0};
/* Set page offset */
idtcm_write(idtcm, channel->hw_dpll_n, HW_DPLL_TOD_OVR__0,
buf, sizeof(buf));
for (i = 0; i < TOD_WRITE_OVERHEAD_COUNT_MAX; i++) {
start = ktime_get_raw();
err = idtcm_write(idtcm, channel->hw_dpll_n,
HW_DPLL_TOD_OVR__0, buf, sizeof(buf));
if (err)
return err;
stop = ktime_get_raw();
diff = ktime_sub(stop, start);
current_ns = ktime_to_ns(diff);
if (i == 0) {
lowest_ns = current_ns;
} else {
if (current_ns < lowest_ns)
lowest_ns = current_ns;
}
}
idtcm->tod_write_overhead_ns = lowest_ns;
return err;
}
static int _idtcm_adjtime_deprecated(struct idtcm_channel *channel, s64 delta)
{
int err;
struct idtcm *idtcm = channel->idtcm;
struct timespec64 ts;
s64 now;
if (abs(delta) < PHASE_PULL_IN_THRESHOLD_NS_DEPRECATED) {
err = channel->do_phase_pull_in(channel, delta, 0);
} else {
idtcm->calculate_overhead_flag = 1;
err = set_tod_write_overhead(channel);
if (err)
return err;
err = _idtcm_gettime_immediate(channel, &ts);
if (err)
return err;
now = timespec64_to_ns(&ts);
now += delta;
ts = ns_to_timespec64(now);
err = _idtcm_settime_deprecated(channel, &ts);
}
return err;
}
static int idtcm_state_machine_reset(struct idtcm *idtcm)
{
u8 byte = SM_RESET_CMD;
u32 status = 0;
int err;
u8 i;
clear_boot_status(idtcm);
err = idtcm_write(idtcm, RESET_CTRL,
IDTCM_FW_REG(idtcm->fw_ver, V520, SM_RESET),
&byte, sizeof(byte));
if (!err) {
for (i = 0; i < 30; i++) {
msleep_interruptible(100);
read_boot_status(idtcm, &status);
if (status == 0xA0) {
dev_dbg(idtcm->dev,
"SM_RESET completed in %d ms", i * 100);
break;
}
}
if (!status)
dev_err(idtcm->dev,
"Timed out waiting for CM_RESET to complete");
}
return err;
}
static int idtcm_read_hw_rev_id(struct idtcm *idtcm, u8 *hw_rev_id)
{
return idtcm_read(idtcm, HW_REVISION, REV_ID, hw_rev_id, sizeof(u8));
}
static int idtcm_read_product_id(struct idtcm *idtcm, u16 *product_id)
{
int err;
u8 buf[2] = {0};
err = idtcm_read(idtcm, GENERAL_STATUS, PRODUCT_ID, buf, sizeof(buf));
*product_id = (buf[1] << 8) | buf[0];
return err;
}
static int idtcm_read_major_release(struct idtcm *idtcm, u8 *major)
{
int err;
u8 buf = 0;
err = idtcm_read(idtcm, GENERAL_STATUS, MAJ_REL, &buf, sizeof(buf));
*major = buf >> 1;
return err;
}
static int idtcm_read_minor_release(struct idtcm *idtcm, u8 *minor)
{
return idtcm_read(idtcm, GENERAL_STATUS, MIN_REL, minor, sizeof(u8));
}
static int idtcm_read_hotfix_release(struct idtcm *idtcm, u8 *hotfix)
{
return idtcm_read(idtcm,
GENERAL_STATUS,
HOTFIX_REL,
hotfix,
sizeof(u8));
}
static int idtcm_read_otp_scsr_config_select(struct idtcm *idtcm,
u8 *config_select)
{
return idtcm_read(idtcm, GENERAL_STATUS, OTP_SCSR_CONFIG_SELECT,
config_select, sizeof(u8));
}
static int set_pll_output_mask(struct idtcm *idtcm, u16 addr, u8 val)
{
int err = 0;
switch (addr) {
case TOD0_OUT_ALIGN_MASK_ADDR:
SET_U16_LSB(idtcm->channel[0].output_mask, val);
break;
case TOD0_OUT_ALIGN_MASK_ADDR + 1:
SET_U16_MSB(idtcm->channel[0].output_mask, val);
break;
case TOD1_OUT_ALIGN_MASK_ADDR:
SET_U16_LSB(idtcm->channel[1].output_mask, val);
break;
case TOD1_OUT_ALIGN_MASK_ADDR + 1:
SET_U16_MSB(idtcm->channel[1].output_mask, val);
break;
case TOD2_OUT_ALIGN_MASK_ADDR:
SET_U16_LSB(idtcm->channel[2].output_mask, val);
break;
case TOD2_OUT_ALIGN_MASK_ADDR + 1:
SET_U16_MSB(idtcm->channel[2].output_mask, val);
break;
case TOD3_OUT_ALIGN_MASK_ADDR:
SET_U16_LSB(idtcm->channel[3].output_mask, val);
break;
case TOD3_OUT_ALIGN_MASK_ADDR + 1:
SET_U16_MSB(idtcm->channel[3].output_mask, val);
break;
default:
err = -EFAULT; /* Bad address */;
break;
}
return err;
}
static int set_tod_ptp_pll(struct idtcm *idtcm, u8 index, u8 pll)
{
if (index >= MAX_TOD) {
dev_err(idtcm->dev, "ToD%d not supported", index);
return -EINVAL;
}
if (pll >= MAX_PLL) {
dev_err(idtcm->dev, "Pll%d not supported", pll);
return -EINVAL;
}
idtcm->channel[index].pll = pll;
return 0;
}
static int check_and_set_masks(struct idtcm *idtcm,
u16 regaddr,
u8 val)
{
int err = 0;
switch (regaddr) {
case TOD_MASK_ADDR:
if ((val & 0xf0) || !(val & 0x0f)) {
dev_err(idtcm->dev, "Invalid TOD mask 0x%02x", val);
err = -EINVAL;
} else {
idtcm->tod_mask = val;
}
break;
case TOD0_PTP_PLL_ADDR:
err = set_tod_ptp_pll(idtcm, 0, val);
break;
case TOD1_PTP_PLL_ADDR:
err = set_tod_ptp_pll(idtcm, 1, val);
break;
case TOD2_PTP_PLL_ADDR:
err = set_tod_ptp_pll(idtcm, 2, val);
break;
case TOD3_PTP_PLL_ADDR:
err = set_tod_ptp_pll(idtcm, 3, val);
break;
default:
err = set_pll_output_mask(idtcm, regaddr, val);
break;
}
return err;
}
static void display_pll_and_masks(struct idtcm *idtcm)
{
u8 i;
u8 mask;
dev_dbg(idtcm->dev, "tod_mask = 0x%02x", idtcm->tod_mask);
for (i = 0; i < MAX_TOD; i++) {
mask = 1 << i;
if (mask & idtcm->tod_mask)
dev_dbg(idtcm->dev,
"TOD%d pll = %d output_mask = 0x%04x",
i, idtcm->channel[i].pll,
idtcm->channel[i].output_mask);
}
}
static int idtcm_load_firmware(struct idtcm *idtcm,
struct device *dev)
{
u16 scratch = IDTCM_FW_REG(idtcm->fw_ver, V520, SCRATCH);
char fname[128] = FW_FILENAME;
const struct firmware *fw;
struct idtcm_fwrc *rec;
u32 regaddr;
int err;
s32 len;
u8 val;
u8 loaddr;
if (firmware) /* module parameter */
snprintf(fname, sizeof(fname), "%s", firmware);
dev_info(idtcm->dev, "requesting firmware '%s'", fname);
err = request_firmware(&fw, fname, dev);
if (err) {
dev_err(idtcm->dev,
"Failed at line %d in %s!", __LINE__, __func__);
return err;
}
dev_dbg(idtcm->dev, "firmware size %zu bytes", fw->size);
rec = (struct idtcm_fwrc *) fw->data;
if (contains_full_configuration(idtcm, fw))
idtcm_state_machine_reset(idtcm);
for (len = fw->size; len > 0; len -= sizeof(*rec)) {
if (rec->reserved) {
dev_err(idtcm->dev,
"bad firmware, reserved field non-zero");
err = -EINVAL;
} else {
regaddr = rec->hiaddr << 8;
regaddr |= rec->loaddr;
val = rec->value;
loaddr = rec->loaddr;
rec++;
err = check_and_set_masks(idtcm, regaddr, val);
}
if (err != -EINVAL) {
err = 0;
/* Top (status registers) and bottom are read-only */
if (regaddr < GPIO_USER_CONTROL || regaddr >= scratch)
continue;
/* Page size 128, last 4 bytes of page skipped */
if ((loaddr > 0x7b && loaddr <= 0x7f) || loaddr > 0xfb)
continue;
err = idtcm_write(idtcm, regaddr, 0, &val, sizeof(val));
}
if (err)
goto out;
}
display_pll_and_masks(idtcm);
out:
release_firmware(fw);
return err;
}
static int idtcm_output_enable(struct idtcm_channel *channel,
bool enable, unsigned int outn)
{
struct idtcm *idtcm = channel->idtcm;
int base;
int err;
u8 val;
base = get_output_base_addr(idtcm->fw_ver, outn);
if (!(base > 0)) {
dev_err(idtcm->dev,
"%s - Unsupported out%d", __func__, outn);
return base;
}
err = idtcm_read(idtcm, (u16)base, OUT_CTRL_1, &val, sizeof(val));
if (err)
return err;
if (enable)
val |= SQUELCH_DISABLE;
else
val &= ~SQUELCH_DISABLE;
return idtcm_write(idtcm, (u16)base, OUT_CTRL_1, &val, sizeof(val));
}
static int idtcm_perout_enable(struct idtcm_channel *channel,
struct ptp_perout_request *perout,
bool enable)
{
struct idtcm *idtcm = channel->idtcm;
struct timespec64 ts = {0, 0};
int err;
err = idtcm_output_enable(channel, enable, perout->index);
if (err) {
dev_err(idtcm->dev, "Unable to set output enable");
return err;
}
/* Align output to internal 1 PPS */
return _idtcm_settime(channel, &ts, SCSR_TOD_WR_TYPE_SEL_DELTA_PLUS);
}
static int idtcm_get_pll_mode(struct idtcm_channel *channel,
enum pll_mode *mode)
{
struct idtcm *idtcm = channel->idtcm;
int err;
u8 dpll_mode;
err = idtcm_read(idtcm, channel->dpll_n,
IDTCM_FW_REG(idtcm->fw_ver, V520, DPLL_MODE),
&dpll_mode, sizeof(dpll_mode));
if (err)
return err;
*mode = (dpll_mode >> PLL_MODE_SHIFT) & PLL_MODE_MASK;
return 0;
}
static int idtcm_set_pll_mode(struct idtcm_channel *channel,
enum pll_mode mode)
{
struct idtcm *idtcm = channel->idtcm;
int err;
u8 dpll_mode;
err = idtcm_read(idtcm, channel->dpll_n,
IDTCM_FW_REG(idtcm->fw_ver, V520, DPLL_MODE),
&dpll_mode, sizeof(dpll_mode));
if (err)
return err;
dpll_mode &= ~(PLL_MODE_MASK << PLL_MODE_SHIFT);
dpll_mode |= (mode << PLL_MODE_SHIFT);
err = idtcm_write(idtcm, channel->dpll_n,
IDTCM_FW_REG(idtcm->fw_ver, V520, DPLL_MODE),
&dpll_mode, sizeof(dpll_mode));
return err;
}
static int idtcm_get_manual_reference(struct idtcm_channel *channel,
enum manual_reference *ref)
{
struct idtcm *idtcm = channel->idtcm;
u8 dpll_manu_ref_cfg;
int err;
err = idtcm_read(idtcm, channel->dpll_ctrl_n,
DPLL_CTRL_DPLL_MANU_REF_CFG,
&dpll_manu_ref_cfg, sizeof(dpll_manu_ref_cfg));
if (err)
return err;
dpll_manu_ref_cfg &= (MANUAL_REFERENCE_MASK << MANUAL_REFERENCE_SHIFT);
*ref = dpll_manu_ref_cfg >> MANUAL_REFERENCE_SHIFT;
return 0;
}
static int idtcm_set_manual_reference(struct idtcm_channel *channel,
enum manual_reference ref)
{
struct idtcm *idtcm = channel->idtcm;
u8 dpll_manu_ref_cfg;
int err;
err = idtcm_read(idtcm, channel->dpll_ctrl_n,
DPLL_CTRL_DPLL_MANU_REF_CFG,
&dpll_manu_ref_cfg, sizeof(dpll_manu_ref_cfg));
if (err)
return err;
dpll_manu_ref_cfg &= ~(MANUAL_REFERENCE_MASK << MANUAL_REFERENCE_SHIFT);
dpll_manu_ref_cfg |= (ref << MANUAL_REFERENCE_SHIFT);
err = idtcm_write(idtcm, channel->dpll_ctrl_n,
DPLL_CTRL_DPLL_MANU_REF_CFG,
&dpll_manu_ref_cfg, sizeof(dpll_manu_ref_cfg));
return err;
}
static int configure_dpll_mode_write_frequency(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
int err;
err = idtcm_set_pll_mode(channel, PLL_MODE_WRITE_FREQUENCY);
if (err)
dev_err(idtcm->dev, "Failed to set pll mode to write frequency");
else
channel->mode = PTP_PLL_MODE_WRITE_FREQUENCY;
return err;
}
static int configure_dpll_mode_write_phase(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
int err;
err = idtcm_set_pll_mode(channel, PLL_MODE_WRITE_PHASE);
if (err)
dev_err(idtcm->dev, "Failed to set pll mode to write phase");
else
channel->mode = PTP_PLL_MODE_WRITE_PHASE;
return err;
}
static int configure_manual_reference_write_frequency(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
int err;
err = idtcm_set_manual_reference(channel, MANU_REF_WRITE_FREQUENCY);
if (err)
dev_err(idtcm->dev, "Failed to set manual reference to write frequency");
else
channel->mode = PTP_PLL_MODE_WRITE_FREQUENCY;
return err;
}
static int configure_manual_reference_write_phase(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
int err;
err = idtcm_set_manual_reference(channel, MANU_REF_WRITE_PHASE);
if (err)
dev_err(idtcm->dev, "Failed to set manual reference to write phase");
else
channel->mode = PTP_PLL_MODE_WRITE_PHASE;
return err;
}
static int idtcm_stop_phase_pull_in(struct idtcm_channel *channel)
{
int err;
err = _idtcm_adjfine(channel, channel->current_freq_scaled_ppm);
if (err)
return err;
channel->phase_pull_in = false;
return 0;
}
static long idtcm_work_handler(struct ptp_clock_info *ptp)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
mutex_lock(idtcm->lock);
(void)idtcm_stop_phase_pull_in(channel);
mutex_unlock(idtcm->lock);
/* Return a negative value here to not reschedule */
return -1;
}
static s32 phase_pull_in_scaled_ppm(s32 current_ppm, s32 phase_pull_in_ppb)
{
/* ppb = scaled_ppm * 125 / 2^13 */
/* scaled_ppm = ppb * 2^13 / 125 */
s64 max_scaled_ppm = div_s64((s64)PHASE_PULL_IN_MAX_PPB << 13, 125);
s64 scaled_ppm = div_s64((s64)phase_pull_in_ppb << 13, 125);
current_ppm += scaled_ppm;
if (current_ppm > max_scaled_ppm)
current_ppm = max_scaled_ppm;
else if (current_ppm < -max_scaled_ppm)
current_ppm = -max_scaled_ppm;
return current_ppm;
}
static int do_phase_pull_in_sw(struct idtcm_channel *channel,
s32 delta_ns,
u32 max_ffo_ppb)
{
s32 current_ppm = channel->current_freq_scaled_ppm;
u32 duration_ms = MSEC_PER_SEC;
s32 delta_ppm;
s32 ppb;
int err;
/* If the ToD correction is less than PHASE_PULL_IN_MIN_THRESHOLD_NS,
* skip. The error introduced by the ToD adjustment procedure would
* be bigger than the required ToD correction
*/
if (abs(delta_ns) < PHASE_PULL_IN_MIN_THRESHOLD_NS)
return 0;
if (max_ffo_ppb == 0)
max_ffo_ppb = PHASE_PULL_IN_MAX_PPB;
/* For most cases, keep phase pull-in duration 1 second */
ppb = delta_ns;
while (abs(ppb) > max_ffo_ppb) {
duration_ms *= 2;
ppb /= 2;
}
delta_ppm = phase_pull_in_scaled_ppm(current_ppm, ppb);
err = _idtcm_adjfine(channel, delta_ppm);
if (err)
return err;
/* schedule the worker to cancel phase pull-in */
ptp_schedule_worker(channel->ptp_clock,
msecs_to_jiffies(duration_ms) - 1);
channel->phase_pull_in = true;
return 0;
}
static int initialize_operating_mode_with_manual_reference(struct idtcm_channel *channel,
enum manual_reference ref)
{
struct idtcm *idtcm = channel->idtcm;
channel->mode = PTP_PLL_MODE_UNSUPPORTED;
channel->configure_write_frequency = configure_manual_reference_write_frequency;
channel->configure_write_phase = configure_manual_reference_write_phase;
channel->do_phase_pull_in = do_phase_pull_in_sw;
switch (ref) {
case MANU_REF_WRITE_PHASE:
channel->mode = PTP_PLL_MODE_WRITE_PHASE;
break;
case MANU_REF_WRITE_FREQUENCY:
channel->mode = PTP_PLL_MODE_WRITE_FREQUENCY;
break;
default:
dev_warn(idtcm->dev,
"Unsupported MANUAL_REFERENCE: 0x%02x", ref);
}
return 0;
}
static int initialize_operating_mode_with_pll_mode(struct idtcm_channel *channel,
enum pll_mode mode)
{
struct idtcm *idtcm = channel->idtcm;
int err = 0;
channel->mode = PTP_PLL_MODE_UNSUPPORTED;
channel->configure_write_frequency = configure_dpll_mode_write_frequency;
channel->configure_write_phase = configure_dpll_mode_write_phase;
channel->do_phase_pull_in = do_phase_pull_in_fw;
switch (mode) {
case PLL_MODE_WRITE_PHASE:
channel->mode = PTP_PLL_MODE_WRITE_PHASE;
break;
case PLL_MODE_WRITE_FREQUENCY:
channel->mode = PTP_PLL_MODE_WRITE_FREQUENCY;
break;
default:
dev_err(idtcm->dev,
"Unsupported PLL_MODE: 0x%02x", mode);
err = -EINVAL;
}
return err;
}
static int initialize_dco_operating_mode(struct idtcm_channel *channel)
{
enum manual_reference ref = MANU_REF_XO_DPLL;
enum pll_mode mode = PLL_MODE_DISABLED;
struct idtcm *idtcm = channel->idtcm;
int err;
channel->mode = PTP_PLL_MODE_UNSUPPORTED;
err = idtcm_get_pll_mode(channel, &mode);
if (err) {
dev_err(idtcm->dev, "Unable to read pll mode!");
return err;
}
if (mode == PLL_MODE_PLL) {
err = idtcm_get_manual_reference(channel, &ref);
if (err) {
dev_err(idtcm->dev, "Unable to read manual reference!");
return err;
}
err = initialize_operating_mode_with_manual_reference(channel, ref);
} else {
err = initialize_operating_mode_with_pll_mode(channel, mode);
}
if (channel->mode == PTP_PLL_MODE_WRITE_PHASE)
channel->configure_write_frequency(channel);
return err;
}
/* PTP Hardware Clock interface */
/*
* Maximum absolute value for write phase offset in nanoseconds
*
* Destination signed register is 32-bit register in resolution of 50ps
*
* 0x7fffffff * 50 = 2147483647 * 50 = 107374182350 ps
* Represent 107374182350 ps as 107374182 ns
*/
static s32 idtcm_getmaxphase(struct ptp_clock_info *ptp __always_unused)
{
return MAX_ABS_WRITE_PHASE_NANOSECONDS;
}
/*
* Internal function for implementing support for write phase offset
*
* @channel: channel
* @delta_ns: delta in nanoseconds
*/
static int _idtcm_adjphase(struct idtcm_channel *channel, s32 delta_ns)
{
struct idtcm *idtcm = channel->idtcm;
int err;
u8 i;
u8 buf[4] = {0};
s32 phase_50ps;
if (channel->mode != PTP_PLL_MODE_WRITE_PHASE) {
err = channel->configure_write_phase(channel);
if (err)
return err;
}
phase_50ps = div_s64((s64)delta_ns * 1000, 50);
for (i = 0; i < 4; i++) {
buf[i] = phase_50ps & 0xff;
phase_50ps >>= 8;
}
err = idtcm_write(idtcm, channel->dpll_phase, DPLL_WR_PHASE,
buf, sizeof(buf));
return err;
}
static int _idtcm_adjfine(struct idtcm_channel *channel, long scaled_ppm)
{
struct idtcm *idtcm = channel->idtcm;
u8 i;
int err;
u8 buf[6] = {0};
s64 fcw;
if (channel->mode != PTP_PLL_MODE_WRITE_FREQUENCY) {
err = channel->configure_write_frequency(channel);
if (err)
return err;
}
/*
* Frequency Control Word unit is: 1.11 * 10^-10 ppm
*
* adjfreq:
* ppb * 10^9
* FCW = ----------
* 111
*
* adjfine:
* ppm_16 * 5^12
* FCW = -------------
* 111 * 2^4
*/
/* 2 ^ -53 = 1.1102230246251565404236316680908e-16 */
fcw = scaled_ppm * 244140625ULL;
fcw = div_s64(fcw, 1776);
for (i = 0; i < 6; i++) {
buf[i] = fcw & 0xff;
fcw >>= 8;
}
err = idtcm_write(idtcm, channel->dpll_freq, DPLL_WR_FREQ,
buf, sizeof(buf));
return err;
}
static int idtcm_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
int err;
mutex_lock(idtcm->lock);
err = _idtcm_gettime_immediate(channel, ts);
mutex_unlock(idtcm->lock);
if (err)
dev_err(idtcm->dev, "Failed at line %d in %s!",
__LINE__, __func__);
return err;
}
static int idtcm_settime_deprecated(struct ptp_clock_info *ptp,
const struct timespec64 *ts)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
int err;
mutex_lock(idtcm->lock);
err = _idtcm_settime_deprecated(channel, ts);
mutex_unlock(idtcm->lock);
if (err)
dev_err(idtcm->dev,
"Failed at line %d in %s!", __LINE__, __func__);
return err;
}
static int idtcm_settime(struct ptp_clock_info *ptp,
const struct timespec64 *ts)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
int err;
mutex_lock(idtcm->lock);
err = _idtcm_settime(channel, ts, SCSR_TOD_WR_TYPE_SEL_ABSOLUTE);
mutex_unlock(idtcm->lock);
if (err)
dev_err(idtcm->dev,
"Failed at line %d in %s!", __LINE__, __func__);
return err;
}
static int idtcm_adjtime_deprecated(struct ptp_clock_info *ptp, s64 delta)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
int err;
mutex_lock(idtcm->lock);
err = _idtcm_adjtime_deprecated(channel, delta);
mutex_unlock(idtcm->lock);
if (err)
dev_err(idtcm->dev,
"Failed at line %d in %s!", __LINE__, __func__);
return err;
}
static int idtcm_adjtime(struct ptp_clock_info *ptp, s64 delta)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
struct timespec64 ts;
enum scsr_tod_write_type_sel type;
int err;
if (channel->phase_pull_in == true)
return -EBUSY;
mutex_lock(idtcm->lock);
if (abs(delta) < PHASE_PULL_IN_THRESHOLD_NS) {
err = channel->do_phase_pull_in(channel, delta, 0);
} else {
if (delta >= 0) {
ts = ns_to_timespec64(delta);
type = SCSR_TOD_WR_TYPE_SEL_DELTA_PLUS;
} else {
ts = ns_to_timespec64(-delta);
type = SCSR_TOD_WR_TYPE_SEL_DELTA_MINUS;
}
err = _idtcm_settime(channel, &ts, type);
}
mutex_unlock(idtcm->lock);
if (err)
dev_err(idtcm->dev,
"Failed at line %d in %s!", __LINE__, __func__);
return err;
}
static int idtcm_adjphase(struct ptp_clock_info *ptp, s32 delta)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
int err;
mutex_lock(idtcm->lock);
err = _idtcm_adjphase(channel, delta);
mutex_unlock(idtcm->lock);
if (err)
dev_err(idtcm->dev,
"Failed at line %d in %s!", __LINE__, __func__);
return err;
}
static int idtcm_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
int err;
if (channel->phase_pull_in == true)
return 0;
if (scaled_ppm == channel->current_freq_scaled_ppm)
return 0;
mutex_lock(idtcm->lock);
err = _idtcm_adjfine(channel, scaled_ppm);
mutex_unlock(idtcm->lock);
if (err)
dev_err(idtcm->dev,
"Failed at line %d in %s!", __LINE__, __func__);
else
channel->current_freq_scaled_ppm = scaled_ppm;
return err;
}
static int idtcm_enable(struct ptp_clock_info *ptp,
struct ptp_clock_request *rq, int on)
{
struct idtcm_channel *channel = container_of(ptp, struct idtcm_channel, caps);
struct idtcm *idtcm = channel->idtcm;
int err = -EOPNOTSUPP;
mutex_lock(idtcm->lock);
switch (rq->type) {
case PTP_CLK_REQ_PEROUT:
if (!on)
err = idtcm_perout_enable(channel, &rq->perout, false);
/* Only accept a 1-PPS aligned to the second. */
else if (rq->perout.start.nsec || rq->perout.period.sec != 1 ||
rq->perout.period.nsec)
err = -ERANGE;
else
err = idtcm_perout_enable(channel, &rq->perout, true);
break;
case PTP_CLK_REQ_EXTTS:
err = idtcm_extts_enable(channel, rq, on);
break;
default:
break;
}
mutex_unlock(idtcm->lock);
if (err)
dev_err(channel->idtcm->dev,
"Failed in %s with err %d!", __func__, err);
return err;
}
static int idtcm_enable_tod(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
struct timespec64 ts = {0, 0};
u16 tod_cfg = IDTCM_FW_REG(idtcm->fw_ver, V520, TOD_CFG);
u8 cfg;
int err;
/*
* Start the TOD clock ticking.
*/
err = idtcm_read(idtcm, channel->tod_n, tod_cfg, &cfg, sizeof(cfg));
if (err)
return err;
cfg |= TOD_ENABLE;
err = idtcm_write(idtcm, channel->tod_n, tod_cfg, &cfg, sizeof(cfg));
if (err)
return err;
if (idtcm->fw_ver < V487)
return _idtcm_settime_deprecated(channel, &ts);
else
return _idtcm_settime(channel, &ts,
SCSR_TOD_WR_TYPE_SEL_ABSOLUTE);
}
static void idtcm_set_version_info(struct idtcm *idtcm)
{
u8 major;
u8 minor;
u8 hotfix;
u16 product_id;
u8 hw_rev_id;
u8 config_select;
idtcm_read_major_release(idtcm, &major);
idtcm_read_minor_release(idtcm, &minor);
idtcm_read_hotfix_release(idtcm, &hotfix);
idtcm_read_product_id(idtcm, &product_id);
idtcm_read_hw_rev_id(idtcm, &hw_rev_id);
idtcm_read_otp_scsr_config_select(idtcm, &config_select);
snprintf(idtcm->version, sizeof(idtcm->version), "%u.%u.%u",
major, minor, hotfix);
idtcm->fw_ver = idtcm_fw_version(idtcm->version);
dev_info(idtcm->dev,
"%d.%d.%d, Id: 0x%04x HW Rev: %d OTP Config Select: %d",
major, minor, hotfix,
product_id, hw_rev_id, config_select);
}
static int idtcm_verify_pin(struct ptp_clock_info *ptp, unsigned int pin,
enum ptp_pin_function func, unsigned int chan)
{
switch (func) {
case PTP_PF_NONE:
case PTP_PF_EXTTS:
break;
case PTP_PF_PEROUT:
case PTP_PF_PHYSYNC:
return -1;
}
return 0;
}
static struct ptp_pin_desc pin_config[MAX_TOD][MAX_REF_CLK];
static const struct ptp_clock_info idtcm_caps = {
.owner = THIS_MODULE,
.max_adj = 244000,
.n_per_out = 12,
.n_ext_ts = MAX_TOD,
.n_pins = MAX_REF_CLK,
.adjphase = &idtcm_adjphase,
.getmaxphase = &idtcm_getmaxphase,
.adjfine = &idtcm_adjfine,
.adjtime = &idtcm_adjtime,
.gettime64 = &idtcm_gettime,
.settime64 = &idtcm_settime,
.enable = &idtcm_enable,
.verify = &idtcm_verify_pin,
.do_aux_work = &idtcm_work_handler,
};
static const struct ptp_clock_info idtcm_caps_deprecated = {
.owner = THIS_MODULE,
.max_adj = 244000,
.n_per_out = 12,
.n_ext_ts = MAX_TOD,
.n_pins = MAX_REF_CLK,
.adjphase = &idtcm_adjphase,
.getmaxphase = &idtcm_getmaxphase,
.adjfine = &idtcm_adjfine,
.adjtime = &idtcm_adjtime_deprecated,
.gettime64 = &idtcm_gettime,
.settime64 = &idtcm_settime_deprecated,
.enable = &idtcm_enable,
.verify = &idtcm_verify_pin,
.do_aux_work = &idtcm_work_handler,
};
static int configure_channel_pll(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
int err = 0;
switch (channel->pll) {
case 0:
channel->dpll_freq = DPLL_FREQ_0;
channel->dpll_n = DPLL_0;
channel->hw_dpll_n = HW_DPLL_0;
channel->dpll_phase = DPLL_PHASE_0;
channel->dpll_ctrl_n = DPLL_CTRL_0;
channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_0;
break;
case 1:
channel->dpll_freq = DPLL_FREQ_1;
channel->dpll_n = DPLL_1;
channel->hw_dpll_n = HW_DPLL_1;
channel->dpll_phase = DPLL_PHASE_1;
channel->dpll_ctrl_n = DPLL_CTRL_1;
channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_1;
break;
case 2:
channel->dpll_freq = DPLL_FREQ_2;
channel->dpll_n = IDTCM_FW_REG(idtcm->fw_ver, V520, DPLL_2);
channel->hw_dpll_n = HW_DPLL_2;
channel->dpll_phase = DPLL_PHASE_2;
channel->dpll_ctrl_n = DPLL_CTRL_2;
channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_2;
break;
case 3:
channel->dpll_freq = DPLL_FREQ_3;
channel->dpll_n = DPLL_3;
channel->hw_dpll_n = HW_DPLL_3;
channel->dpll_phase = DPLL_PHASE_3;
channel->dpll_ctrl_n = DPLL_CTRL_3;
channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_3;
break;
case 4:
channel->dpll_freq = DPLL_FREQ_4;
channel->dpll_n = IDTCM_FW_REG(idtcm->fw_ver, V520, DPLL_4);
channel->hw_dpll_n = HW_DPLL_4;
channel->dpll_phase = DPLL_PHASE_4;
channel->dpll_ctrl_n = DPLL_CTRL_4;
channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_4;
break;
case 5:
channel->dpll_freq = DPLL_FREQ_5;
channel->dpll_n = DPLL_5;
channel->hw_dpll_n = HW_DPLL_5;
channel->dpll_phase = DPLL_PHASE_5;
channel->dpll_ctrl_n = DPLL_CTRL_5;
channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_5;
break;
case 6:
channel->dpll_freq = DPLL_FREQ_6;
channel->dpll_n = IDTCM_FW_REG(idtcm->fw_ver, V520, DPLL_6);
channel->hw_dpll_n = HW_DPLL_6;
channel->dpll_phase = DPLL_PHASE_6;
channel->dpll_ctrl_n = DPLL_CTRL_6;
channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_6;
break;
case 7:
channel->dpll_freq = DPLL_FREQ_7;
channel->dpll_n = DPLL_7;
channel->hw_dpll_n = HW_DPLL_7;
channel->dpll_phase = DPLL_PHASE_7;
channel->dpll_ctrl_n = DPLL_CTRL_7;
channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_7;
break;
default:
err = -EINVAL;
}
return err;
}
/*
* Compensate for the PTP DCO input-to-output delay.
* This delay is 18 FOD cycles.
*/
static u32 idtcm_get_dco_delay(struct idtcm_channel *channel)
{
struct idtcm *idtcm = channel->idtcm;
u8 mbuf[8] = {0};
u8 nbuf[2] = {0};
u32 fodFreq;
int err;
u64 m;
u16 n;
err = idtcm_read(idtcm, channel->dpll_ctrl_n,
DPLL_CTRL_DPLL_FOD_FREQ, mbuf, 6);
if (err)
return 0;
err = idtcm_read(idtcm, channel->dpll_ctrl_n,
DPLL_CTRL_DPLL_FOD_FREQ + 6, nbuf, 2);
if (err)
return 0;
m = get_unaligned_le64(mbuf);
n = get_unaligned_le16(nbuf);
if (n == 0)
n = 1;
fodFreq = (u32)div_u64(m, n);
if (fodFreq >= 500000000)
return (u32)div_u64(18 * (u64)NSEC_PER_SEC, fodFreq);
return 0;
}
static int configure_channel_tod(struct idtcm_channel *channel, u32 index)
{
enum fw_version fw_ver = channel->idtcm->fw_ver;
/* Set tod addresses */
switch (index) {
case 0:
channel->tod_read_primary = IDTCM_FW_REG(fw_ver, V520, TOD_READ_PRIMARY_0);
channel->tod_read_secondary = IDTCM_FW_REG(fw_ver, V520, TOD_READ_SECONDARY_0);
channel->tod_write = IDTCM_FW_REG(fw_ver, V520, TOD_WRITE_0);
channel->tod_n = IDTCM_FW_REG(fw_ver, V520, TOD_0);
channel->sync_src = SYNC_SOURCE_DPLL0_TOD_PPS;
break;
case 1:
channel->tod_read_primary = IDTCM_FW_REG(fw_ver, V520, TOD_READ_PRIMARY_1);
channel->tod_read_secondary = IDTCM_FW_REG(fw_ver, V520, TOD_READ_SECONDARY_1);
channel->tod_write = IDTCM_FW_REG(fw_ver, V520, TOD_WRITE_1);
channel->tod_n = IDTCM_FW_REG(fw_ver, V520, TOD_1);
channel->sync_src = SYNC_SOURCE_DPLL1_TOD_PPS;
break;
case 2:
channel->tod_read_primary = IDTCM_FW_REG(fw_ver, V520, TOD_READ_PRIMARY_2);
channel->tod_read_secondary = IDTCM_FW_REG(fw_ver, V520, TOD_READ_SECONDARY_2);
channel->tod_write = IDTCM_FW_REG(fw_ver, V520, TOD_WRITE_2);
channel->tod_n = IDTCM_FW_REG(fw_ver, V520, TOD_2);
channel->sync_src = SYNC_SOURCE_DPLL2_TOD_PPS;
break;
case 3:
channel->tod_read_primary = IDTCM_FW_REG(fw_ver, V520, TOD_READ_PRIMARY_3);
channel->tod_read_secondary = IDTCM_FW_REG(fw_ver, V520, TOD_READ_SECONDARY_3);
channel->tod_write = IDTCM_FW_REG(fw_ver, V520, TOD_WRITE_3);
channel->tod_n = IDTCM_FW_REG(fw_ver, V520, TOD_3);
channel->sync_src = SYNC_SOURCE_DPLL3_TOD_PPS;
break;
default:
return -EINVAL;
}
return 0;
}
static int idtcm_enable_channel(struct idtcm *idtcm, u32 index)
{
struct idtcm_channel *channel;
int err;
int i;
if (!(index < MAX_TOD))
return -EINVAL;
channel = &idtcm->channel[index];
channel->idtcm = idtcm;
channel->current_freq_scaled_ppm = 0;
/* Set pll addresses */
err = configure_channel_pll(channel);
if (err)
return err;
/* Set tod addresses */
err = configure_channel_tod(channel, index);
if (err)
return err;
if (idtcm->fw_ver < V487)
channel->caps = idtcm_caps_deprecated;
else
channel->caps = idtcm_caps;
snprintf(channel->caps.name, sizeof(channel->caps.name),
"IDT CM TOD%u", index);
channel->caps.pin_config = pin_config[index];
for (i = 0; i < channel->caps.n_pins; ++i) {
struct ptp_pin_desc *ppd = &channel->caps.pin_config[i];
snprintf(ppd->name, sizeof(ppd->name), "input_ref%d", i);
ppd->index = i;
ppd->func = PTP_PF_NONE;
ppd->chan = index;
}
err = initialize_dco_operating_mode(channel);
if (err)
return err;
err = idtcm_enable_tod(channel);
if (err) {
dev_err(idtcm->dev,
"Failed at line %d in %s!", __LINE__, __func__);
return err;
}
channel->dco_delay = idtcm_get_dco_delay(channel);
channel->ptp_clock = ptp_clock_register(&channel->caps, NULL);
if (IS_ERR(channel->ptp_clock)) {
err = PTR_ERR(channel->ptp_clock);
channel->ptp_clock = NULL;
return err;
}
if (!channel->ptp_clock)
return -ENOTSUPP;
dev_info(idtcm->dev, "PLL%d registered as ptp%d",
index, channel->ptp_clock->index);
return 0;
}
static int idtcm_enable_extts_channel(struct idtcm *idtcm, u32 index)
{
struct idtcm_channel *channel;
int err;
if (!(index < MAX_TOD))
return -EINVAL;
channel = &idtcm->channel[index];
channel->idtcm = idtcm;
/* Set tod addresses */
err = configure_channel_tod(channel, index);
if (err)
return err;
channel->idtcm = idtcm;
return 0;
}
static void idtcm_extts_check(struct work_struct *work)
{
struct idtcm *idtcm = container_of(work, struct idtcm, extts_work.work);
struct idtcm_channel *channel;
u8 mask;
int err;
int i;
if (idtcm->extts_mask == 0)
return;
mutex_lock(idtcm->lock);
for (i = 0; i < MAX_TOD; i++) {
mask = 1 << i;
if ((idtcm->extts_mask & mask) == 0)
continue;
err = idtcm_extts_check_channel(idtcm, i);
if (err == 0) {
/* trigger clears itself, so clear the mask */
if (idtcm->extts_single_shot) {
idtcm->extts_mask &= ~mask;
} else {
/* Re-arm */
channel = &idtcm->channel[i];
arm_tod_read_trig_sel_refclk(channel, channel->refn);
}
}
}
if (idtcm->extts_mask)
schedule_delayed_work(&idtcm->extts_work,
msecs_to_jiffies(EXTTS_PERIOD_MS));
mutex_unlock(idtcm->lock);
}
static void ptp_clock_unregister_all(struct idtcm *idtcm)
{
u8 i;
struct idtcm_channel *channel;
for (i = 0; i < MAX_TOD; i++) {
channel = &idtcm->channel[i];
if (channel->ptp_clock)
ptp_clock_unregister(channel->ptp_clock);
}
}
static void set_default_masks(struct idtcm *idtcm)
{
idtcm->tod_mask = DEFAULT_TOD_MASK;
idtcm->extts_mask = 0;
idtcm->channel[0].tod = 0;
idtcm->channel[1].tod = 1;
idtcm->channel[2].tod = 2;
idtcm->channel[3].tod = 3;
idtcm->channel[0].pll = DEFAULT_TOD0_PTP_PLL;
idtcm->channel[1].pll = DEFAULT_TOD1_PTP_PLL;
idtcm->channel[2].pll = DEFAULT_TOD2_PTP_PLL;
idtcm->channel[3].pll = DEFAULT_TOD3_PTP_PLL;
idtcm->channel[0].output_mask = DEFAULT_OUTPUT_MASK_PLL0;
idtcm->channel[1].output_mask = DEFAULT_OUTPUT_MASK_PLL1;
idtcm->channel[2].output_mask = DEFAULT_OUTPUT_MASK_PLL2;
idtcm->channel[3].output_mask = DEFAULT_OUTPUT_MASK_PLL3;
}
static int idtcm_probe(struct platform_device *pdev)
{
struct rsmu_ddata *ddata = dev_get_drvdata(pdev->dev.parent);
struct idtcm *idtcm;
int err;
u8 i;
idtcm = devm_kzalloc(&pdev->dev, sizeof(struct idtcm), GFP_KERNEL);
if (!idtcm)
return -ENOMEM;
idtcm->dev = &pdev->dev;
idtcm->mfd = pdev->dev.parent;
idtcm->lock = &ddata->lock;
idtcm->regmap = ddata->regmap;
idtcm->calculate_overhead_flag = 0;
INIT_DELAYED_WORK(&idtcm->extts_work, idtcm_extts_check);
set_default_masks(idtcm);
mutex_lock(idtcm->lock);
idtcm_set_version_info(idtcm);
err = idtcm_load_firmware(idtcm, &pdev->dev);
if (err)
dev_warn(idtcm->dev, "loading firmware failed with %d", err);
wait_for_chip_ready(idtcm);
if (idtcm->tod_mask) {
for (i = 0; i < MAX_TOD; i++) {
if (idtcm->tod_mask & (1 << i))
err = idtcm_enable_channel(idtcm, i);
else
err = idtcm_enable_extts_channel(idtcm, i);
if (err) {
dev_err(idtcm->dev,
"idtcm_enable_channel %d failed!", i);
break;
}
}
} else {
dev_err(idtcm->dev,
"no PLLs flagged as PHCs, nothing to do");
err = -ENODEV;
}
mutex_unlock(idtcm->lock);
if (err) {
ptp_clock_unregister_all(idtcm);
return err;
}
platform_set_drvdata(pdev, idtcm);
return 0;
}
static void idtcm_remove(struct platform_device *pdev)
{
struct idtcm *idtcm = platform_get_drvdata(pdev);
idtcm->extts_mask = 0;
ptp_clock_unregister_all(idtcm);
cancel_delayed_work_sync(&idtcm->extts_work);
}
static struct platform_driver idtcm_driver = {
.driver = {
.name = "8a3400x-phc",
},
.probe = idtcm_probe,
.remove_new = idtcm_remove,
};
module_platform_driver(idtcm_driver);
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