lkml.org 
[lkml]   [2020]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 net 1/1] ptp: idt82p33: add adjphase support
Date
From: Min Li <min.li.xe@renesas.com>

Add idt82p33_adjwritephase() to support PHC write phase mode.

Changes since v1:
- Fix broken build on 32 bit machine due to 64 bit division.

Signed-off-by: Min Li <min.li.xe@renesas.com>
---
drivers/ptp/ptp_idt82p33.c | 317 ++++++++++++++++++++++++++++++++++-----------
drivers/ptp/ptp_idt82p33.h | 3 +
2 files changed, 244 insertions(+), 76 deletions(-)

diff --git a/drivers/ptp/ptp_idt82p33.c b/drivers/ptp/ptp_idt82p33.c
index 179f6c4..ed1659e 100644
--- a/drivers/ptp/ptp_idt82p33.c
+++ b/drivers/ptp/ptp_idt82p33.c
@@ -33,6 +33,9 @@ module_param(phase_snap_threshold, uint, 0);
MODULE_PARM_DESC(phase_snap_threshold,
"threshold (150000ns by default) below which adjtime would ignore");

+static char *firmware;
+module_param(firmware, charp, 0);
+
static void idt82p33_byte_array_to_timespec(struct timespec64 *ts,
u8 buf[TOD_BYTE_COUNT])
{
@@ -77,15 +80,15 @@ static void idt82p33_timespec_to_byte_array(struct timespec64 const *ts,
}
}

-static int idt82p33_xfer(struct idt82p33 *idt82p33,
- unsigned char regaddr,
- unsigned char *buf,
- unsigned int count,
- int write)
+static int idt82p33_xfer_read(struct idt82p33 *idt82p33,
+ unsigned char regaddr,
+ unsigned char *buf,
+ unsigned int count)
{
struct i2c_client *client = idt82p33->client;
struct i2c_msg msg[2];
int cnt;
+ char *fmt = "i2c_transfer failed at %d in %s, at addr: %04X!\n";

msg[0].addr = client->addr;
msg[0].flags = 0;
@@ -93,13 +96,17 @@ static int idt82p33_xfer(struct idt82p33 *idt82p33,
msg[0].buf = &regaddr;

msg[1].addr = client->addr;
- msg[1].flags = write ? 0 : I2C_M_RD;
+ msg[1].flags = I2C_M_RD;
msg[1].len = count;
msg[1].buf = buf;

cnt = i2c_transfer(client->adapter, msg, 2);
if (cnt < 0) {
- dev_err(&client->dev, "i2c_transfer returned %d\n", cnt);
+ dev_err(&client->dev,
+ fmt,
+ __LINE__,
+ __func__,
+ (u8) regaddr);
return cnt;
} else if (cnt != 2) {
dev_err(&client->dev,
@@ -109,6 +116,37 @@ static int idt82p33_xfer(struct idt82p33 *idt82p33,
return 0;
}

+static int idt82p33_xfer_write(struct idt82p33 *idt82p33,
+ u8 regaddr,
+ u8 *buf,
+ u16 count)
+{
+ struct i2c_client *client = idt82p33->client;
+ /* we add 1 byte for device register */
+ u8 msg[IDT82P33_MAX_WRITE_COUNT + 1];
+ int cnt;
+ char *fmt = "i2c_master_send failed at %d in %s, at addr: %04X!\n";
+
+ if (count > IDT82P33_MAX_WRITE_COUNT)
+ return -EINVAL;
+
+ msg[0] = regaddr;
+ memcpy(&msg[1], buf, count);
+
+ cnt = i2c_master_send(client, msg, count + 1);
+
+ if (cnt < 0) {
+ dev_err(&client->dev,
+ fmt,
+ __LINE__,
+ __func__,
+ regaddr);
+ return cnt;
+ }
+
+ return 0;
+}
+
static int idt82p33_page_offset(struct idt82p33 *idt82p33, unsigned char val)
{
int err;
@@ -116,7 +154,7 @@ static int idt82p33_page_offset(struct idt82p33 *idt82p33, unsigned char val)
if (idt82p33->page_offset == val)
return 0;

- err = idt82p33_xfer(idt82p33, PAGE_ADDR, &val, sizeof(val), 1);
+ err = idt82p33_xfer_write(idt82p33, PAGE_ADDR, &val, sizeof(val));
if (err)
dev_err(&idt82p33->client->dev,
"failed to set page offset %d\n", val);
@@ -137,11 +175,12 @@ static int idt82p33_rdwr(struct idt82p33 *idt82p33, unsigned int regaddr,

err = idt82p33_page_offset(idt82p33, page);
if (err)
- goto out;
+ return err;

- err = idt82p33_xfer(idt82p33, offset, buf, count, write);
-out:
- return err;
+ if (write)
+ return idt82p33_xfer_write(idt82p33, offset, buf, count);
+
+ return idt82p33_xfer_read(idt82p33, offset, buf, count);
}

static int idt82p33_read(struct idt82p33 *idt82p33, unsigned int regaddr,
@@ -294,7 +333,6 @@ static int _idt82p33_adjfine(struct idt82p33_channel *channel, long scaled_ppm)
{
struct idt82p33 *idt82p33 = channel->idt82p33;
unsigned char buf[5] = {0};
- int neg_adj = 0;
int err, i;
s64 fcw;

@@ -314,16 +352,9 @@ static int _idt82p33_adjfine(struct idt82p33_channel *channel, long scaled_ppm)
* FCW = -------------
* 168 * 2^4
*/
- if (scaled_ppm < 0) {
- neg_adj = 1;
- scaled_ppm = -scaled_ppm;
- }

fcw = scaled_ppm * 244140625ULL;
- fcw = div_u64(fcw, 2688);
-
- if (neg_adj)
- fcw = -fcw;
+ fcw = div_s64(fcw, 2688);

for (i = 0; i < 5; i++) {
buf[i] = fcw & 0xff;
@@ -448,8 +479,13 @@ static int idt82p33_measure_tod_write_overhead(struct idt82p33_channel *channel)

err = idt82p33_measure_settime_gettime_gap_overhead(channel, &gap_ns);

- if (err)
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
return err;
+ }

err = idt82p33_measure_one_byte_write_overhead(channel,
&one_byte_write_ns);
@@ -518,12 +554,10 @@ static int idt82p33_sync_tod(struct idt82p33_channel *channel, bool enable)
u8 sync_cnfg;
int err;

- if (enable == channel->sync_tod_on) {
- if (enable && sync_tod_timeout) {
- mod_delayed_work(system_wq, &channel->sync_tod_work,
- sync_tod_timeout * HZ);
- }
- return 0;
+ /* Turn it off after sync_tod_timeout seconds */
+ if (enable && sync_tod_timeout) {
+ ptp_schedule_worker(channel->ptp_clock,
+ sync_tod_timeout * HZ);
}

err = idt82p33_read(idt82p33, channel->dpll_sync_cnfg,
@@ -541,20 +575,13 @@ static int idt82p33_sync_tod(struct idt82p33_channel *channel, bool enable)
if (err)
return err;

- channel->sync_tod_on = enable;
-
- if (enable && sync_tod_timeout) {
- mod_delayed_work(system_wq, &channel->sync_tod_work,
- sync_tod_timeout * HZ);
- }
-
return 0;
}

-static void idt82p33_sync_tod_work_handler(struct work_struct *work)
+static long idt82p33_sync_tod_work_handler(struct ptp_clock_info *ptp)
{
struct idt82p33_channel *channel =
- container_of(work, struct idt82p33_channel, sync_tod_work.work);
+ container_of(ptp, struct idt82p33_channel, caps);
struct idt82p33 *idt82p33 = channel->idt82p33;

mutex_lock(&idt82p33->reg_lock);
@@ -562,35 +589,51 @@ static void idt82p33_sync_tod_work_handler(struct work_struct *work)
(void)idt82p33_sync_tod(channel, false);

mutex_unlock(&idt82p33->reg_lock);
+
+ /* Return a negative value here to not reschedule */
+ return -1;
}

-static int idt82p33_pps_enable(struct idt82p33_channel *channel, bool enable)
+static int idt82p33_output_enable(struct idt82p33_channel *channel,
+ bool enable, unsigned int outn)
{
struct idt82p33 *idt82p33 = channel->idt82p33;
- u8 mask, outn, val;
int err;
+ u8 val;
+
+ err = idt82p33_read(idt82p33, OUT_MUX_CNFG(outn), &val, sizeof(val));
+
+ if (err)
+ return err;
+
+ if (enable)
+ val &= ~SQUELCH_ENABLE;
+ else
+ val |= SQUELCH_ENABLE;
+
+ return idt82p33_write(idt82p33, OUT_MUX_CNFG(outn), &val, sizeof(val));
+}
+
+static int idt82p33_output_mask_enable(struct idt82p33_channel *channel,
+ bool enable)
+{
+ u16 mask;
+ int err;
+ u8 outn;

mask = channel->output_mask;
outn = 0;

while (mask) {
- if (mask & 0x1) {
- err = idt82p33_read(idt82p33, OUT_MUX_CNFG(outn),
- &val, sizeof(val));
- if (err)
- return err;

- if (enable)
- val &= ~SQUELCH_ENABLE;
- else
- val |= SQUELCH_ENABLE;
+ if (mask & 0x1) {

- err = idt82p33_write(idt82p33, OUT_MUX_CNFG(outn),
- &val, sizeof(val));
+ err = idt82p33_output_enable(channel, enable, outn);

if (err)
return err;
}
+
mask >>= 0x1;
outn++;
}
@@ -598,6 +641,20 @@ static int idt82p33_pps_enable(struct idt82p33_channel *channel, bool enable)
return 0;
}

+static int idt82p33_perout_enable(struct idt82p33_channel *channel,
+ bool enable,
+ struct ptp_perout_request *perout)
+{
+ unsigned int flags = perout->flags;
+
+ /* Enable/disable output based on output_mask */
+ if (flags == PEROUT_ENABLE_OUTPUT_MASK)
+ return idt82p33_output_mask_enable(channel, enable);
+
+ /* Enable/disable individual output instead */
+ return idt82p33_output_enable(channel, enable, perout->index);
+}
+
static int idt82p33_enable_tod(struct idt82p33_channel *channel)
{
struct idt82p33 *idt82p33 = channel->idt82p33;
@@ -611,15 +668,27 @@ static int idt82p33_enable_tod(struct idt82p33_channel *channel)
if (err)
return err;

- err = idt82p33_pps_enable(channel, false);
+ /* Temporary workaround for ts2phc compatibility */
+ if (0)
+ err = idt82p33_output_mask_enable(channel, false);

- if (err)
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
return err;
+ }

err = idt82p33_measure_tod_write_overhead(channel);

- if (err)
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
return err;
+ }

err = _idt82p33_settime(channel, &ts);

@@ -638,10 +707,8 @@ static void idt82p33_ptp_clock_unregister_all(struct idt82p33 *idt82p33)

channel = &idt82p33->channel[i];

- if (channel->ptp_clock) {
+ if (channel->ptp_clock)
ptp_clock_unregister(channel->ptp_clock);
- cancel_delayed_work_sync(&channel->sync_tod_work);
- }
}
}

@@ -659,14 +726,16 @@ static int idt82p33_enable(struct ptp_clock_info *ptp,

if (rq->type == PTP_CLK_REQ_PEROUT) {
if (!on)
- err = idt82p33_pps_enable(channel, false);
+ err = idt82p33_perout_enable(channel, false,
+ &rq->perout);

/* 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 = idt82p33_pps_enable(channel, true);
+ err = idt82p33_perout_enable(channel, true,
+ &rq->perout);
}

mutex_unlock(&idt82p33->reg_lock);
@@ -674,6 +743,51 @@ static int idt82p33_enable(struct ptp_clock_info *ptp,
return err;
}

+static int idt82p33_adjwritephase(struct ptp_clock_info *ptp, s32 offsetNs)
+{
+ struct idt82p33_channel *channel =
+ container_of(ptp, struct idt82p33_channel, caps);
+ struct idt82p33 *idt82p33 = channel->idt82p33;
+ s64 offsetInFs;
+ s64 offsetRegVal;
+ u8 val[4] = {0};
+ int err;
+
+ offsetInFs = (s64)(-offsetNs) * 1000000;
+
+ if (offsetInFs > WRITE_PHASE_OFFSET_LIMIT)
+ offsetInFs = WRITE_PHASE_OFFSET_LIMIT;
+ else if (offsetInFs < -WRITE_PHASE_OFFSET_LIMIT)
+ offsetInFs = -WRITE_PHASE_OFFSET_LIMIT;
+
+ /* Convert from phaseOffsetInFs to register value */
+ offsetRegVal = div_s64(offsetInFs * 1000, IDT_T0DPLL_PHASE_RESOL);
+
+ val[0] = offsetRegVal & 0xFF;
+ val[1] = (offsetRegVal >> 8) & 0xFF;
+ val[2] = (offsetRegVal >> 16) & 0xFF;
+ val[3] = (offsetRegVal >> 24) & 0x1F;
+ val[3] |= PH_OFFSET_EN;
+
+ mutex_lock(&idt82p33->reg_lock);
+
+ err = idt82p33_dpll_set_mode(channel, PLL_MODE_WPH);
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
+ goto out;
+ }
+
+ err = idt82p33_write(idt82p33, channel->dpll_phase_cnfg, val,
+ sizeof(val));
+
+out:
+ mutex_unlock(&idt82p33->reg_lock);
+ return err;
+}
+
static int idt82p33_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
{
struct idt82p33_channel *channel =
@@ -683,6 +797,11 @@ static int idt82p33_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)

mutex_lock(&idt82p33->reg_lock);
err = _idt82p33_adjfine(channel, scaled_ppm);
+ if (err)
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
mutex_unlock(&idt82p33->reg_lock);

return err;
@@ -706,10 +825,19 @@ static int idt82p33_adjtime(struct ptp_clock_info *ptp, s64 delta_ns)

if (err) {
mutex_unlock(&idt82p33->reg_lock);
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
return err;
}

err = idt82p33_sync_tod(channel, true);
+ if (err)
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);

mutex_unlock(&idt82p33->reg_lock);

@@ -725,6 +853,11 @@ static int idt82p33_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)

mutex_lock(&idt82p33->reg_lock);
err = _idt82p33_gettime(channel, ts);
+ if (err)
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
mutex_unlock(&idt82p33->reg_lock);

return err;
@@ -740,6 +873,11 @@ static int idt82p33_settime(struct ptp_clock_info *ptp,

mutex_lock(&idt82p33->reg_lock);
err = _idt82p33_settime(channel, ts);
+ if (err)
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
mutex_unlock(&idt82p33->reg_lock);

return err;
@@ -772,9 +910,6 @@ static int idt82p33_channel_init(struct idt82p33_channel *channel, int index)
return -EINVAL;
}

- INIT_DELAYED_WORK(&channel->sync_tod_work,
- idt82p33_sync_tod_work_handler);
- channel->sync_tod_on = false;
channel->current_freq_ppb = 0;

return 0;
@@ -784,11 +919,14 @@ static void idt82p33_caps_init(struct ptp_clock_info *caps)
{
caps->owner = THIS_MODULE;
caps->max_adj = 92000;
+ caps->n_per_out = 11;
+ caps->adjphase = idt82p33_adjwritephase;
caps->adjfine = idt82p33_adjfine;
caps->adjtime = idt82p33_adjtime;
caps->gettime64 = idt82p33_gettime;
caps->settime64 = idt82p33_settime;
caps->enable = idt82p33_enable;
+ caps->do_aux_work = idt82p33_sync_tod_work_handler;
}

static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index)
@@ -802,23 +940,19 @@ static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index)
channel = &idt82p33->channel[index];

err = idt82p33_channel_init(channel, index);
- if (err)
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
return err;
+ }

channel->idt82p33 = idt82p33;

idt82p33_caps_init(&channel->caps);
snprintf(channel->caps.name, sizeof(channel->caps.name),
"IDT 82P33 PLL%u", index);
- channel->caps.n_per_out = hweight8(channel->output_mask);
-
- err = idt82p33_dpll_set_mode(channel, PLL_MODE_DCO);
- if (err)
- return err;
-
- err = idt82p33_enable_tod(channel);
- if (err)
- return err;

channel->ptp_clock = ptp_clock_register(&channel->caps, NULL);

@@ -831,6 +965,24 @@ static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index)
if (!channel->ptp_clock)
return -ENOTSUPP;

+ err = idt82p33_dpll_set_mode(channel, PLL_MODE_DCO);
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
+ return err;
+ }
+
+ err = idt82p33_enable_tod(channel);
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
+ return err;
+ }
+
dev_info(&idt82p33->client->dev, "PLL%d registered as ptp%d\n",
index, channel->ptp_clock->index);

@@ -839,19 +991,27 @@ static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index)

static int idt82p33_load_firmware(struct idt82p33 *idt82p33)
{
+ char fname[128] = FW_FILENAME;
const struct firmware *fw;
struct idt82p33_fwrc *rec;
u8 loaddr, page, val;
int err;
s32 len;

- dev_dbg(&idt82p33->client->dev,
- "requesting firmware '%s'\n", FW_FILENAME);
+ if (firmware) /* module parameter */
+ snprintf(fname, sizeof(fname), "%s", firmware);

- err = request_firmware(&fw, FW_FILENAME, &idt82p33->client->dev);
+ dev_dbg(&idt82p33->client->dev, "requesting firmware '%s'\n", fname);

- if (err)
+ err = request_firmware(&fw, fname, &idt82p33->client->dev);
+
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at line %d in func %s!\n",
+ __LINE__,
+ __func__);
return err;
+ }

dev_dbg(&idt82p33->client->dev, "firmware size %zu bytes\n", fw->size);

@@ -935,8 +1095,13 @@ static int idt82p33_probe(struct i2c_client *client,
for (i = 0; i < MAX_PHC_PLL; i++) {
if (idt82p33->pll_mask & (1 << i)) {
err = idt82p33_enable_channel(idt82p33, i);
- if (err)
+ if (err) {
+ dev_err(&idt82p33->client->dev,
+ "Failed at %d in func %s!\n",
+ __LINE__,
+ __func__);
break;
+ }
}
}
} else {
diff --git a/drivers/ptp/ptp_idt82p33.h b/drivers/ptp/ptp_idt82p33.h
index 9d46966..1c7a0f0 100644
--- a/drivers/ptp/ptp_idt82p33.h
+++ b/drivers/ptp/ptp_idt82p33.h
@@ -56,6 +56,8 @@
#define PLL_MODE_SHIFT (0)
#define PLL_MODE_MASK (0x1F)

+#define PEROUT_ENABLE_OUTPUT_MASK (0xdeadbeef)
+
enum pll_mode {
PLL_MODE_MIN = 0,
PLL_MODE_AUTOMATIC = PLL_MODE_MIN,
@@ -93,6 +95,7 @@ enum hw_tod_trig_sel {
#define MAX_MEASURMENT_COUNT (5)
#define SNAP_THRESHOLD_NS (150000)
#define SYNC_TOD_TIMEOUT_SEC (5)
+#define IDT82P33_MAX_WRITE_COUNT (512)

#define PLLMASK_ADDR_HI 0xFF
#define PLLMASK_ADDR_LO 0xA5
--
2.7.4
\
 
 \ /
  Last update: 2020-11-02 17:03    [W:0.076 / U:2.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site