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Commit e432dd3b authored by Raju Lakkaraju's avatar Raju Lakkaraju Committed by David S. Miller
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net: lan743x: Add support for PTP-IO Event Output (Periodic Output) 

Add support for PTP-IO Event Output (Periodic Output - perout) for
PCI11010/PCI11414 chips
Signed-off-by: default avatarRaju Lakkaraju <Raju.Lakkaraju@microchip.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 60942c39
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Showing with 250 additions and 2 deletions
drivers/net/ethernet/microchip/lan743x_main.h
View file @ e432dd3b
......@@ -336,6 +336,7 @@
#define INT_MOD_CFG9 (0x7E4)
#define PTP_CMD_CTL (0x0A00)
#define PTP_CMD_CTL_PTP_LTC_TARGET_READ_ BIT(13)
#define PTP_CMD_CTL_PTP_CLK_STP_NSEC_ BIT(6)
#define PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_ BIT(5)
#define PTP_CMD_CTL_PTP_CLOCK_LOAD_ BIT(4)
......@@ -357,6 +358,30 @@
(((value) & 0x7) << (1 + ((channel) << 2)))
#define PTP_GENERAL_CONFIG_RELOAD_ADD_X_(channel) (BIT((channel) << 2))
#define HS_PTP_GENERAL_CONFIG (0x0A04)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_(channel) \
(0xf << (4 + ((channel) << 2)))
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_ (0)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500NS_ (1)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1US_ (2)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5US_ (3)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_ (4)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50US_ (5)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_ (6)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500US_ (7)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_ (8)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5MS_ (9)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_ (10)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50MS_ (11)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100MS_ (12)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_ (13)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_TOGG_ (14)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_INT_ (15)
#define HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_(channel, value) \
(((value) & 0xf) << (4 + ((channel) << 2)))
#define HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(channel) (BIT(1 + ((channel) * 2)))
#define HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(channel) (BIT((channel) * 2))
#define PTP_INT_STS (0x0A08)
#define PTP_INT_IO_FE_MASK_ GENMASK(31, 24)
#define PTP_INT_IO_FE_SHIFT_ (24)
......@@ -364,9 +389,17 @@
#define PTP_INT_IO_RE_MASK_ GENMASK(23, 16)
#define PTP_INT_IO_RE_SHIFT_ (16)
#define PTP_INT_IO_RE_SET_(channel) BIT(16 + (channel))
#define PTP_INT_TX_TS_OVRFL_INT_ BIT(14)
#define PTP_INT_TX_SWTS_ERR_INT_ BIT(13)
#define PTP_INT_TX_TS_INT_ BIT(12)
#define PTP_INT_RX_TS_OVRFL_INT_ BIT(9)
#define PTP_INT_RX_TS_INT_ BIT(8)
#define PTP_INT_TIMER_INT_B_ BIT(1)
#define PTP_INT_TIMER_INT_A_ BIT(0)
#define PTP_INT_EN_SET (0x0A0C)
#define PTP_INT_EN_FE_EN_SET_(channel) BIT(24 + (channel))
#define PTP_INT_EN_RE_EN_SET_(channel) BIT(16 + (channel))
#define PTP_INT_EN_TIMER_SET_(channel) BIT(channel)
#define PTP_INT_EN_CLR (0x0A10)
#define PTP_INT_EN_FE_EN_CLR_(channel) BIT(24 + (channel))
#define PTP_INT_EN_RE_EN_CLR_(channel) BIT(16 + (channel))
......
drivers/net/ethernet/microchip/lan743x_ptp.c
View file @ e432dd3b
......@@ -689,6 +689,215 @@ static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on,
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)
{
......@@ -812,9 +1021,14 @@ static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci,
&request->extts);
return -EINVAL;
case PTP_CLK_REQ_PEROUT:
if (request->perout.index < ptpci->n_per_out)
return lan743x_ptp_perout(adapter, on,
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;
......
drivers/net/ethernet/microchip/lan743x_ptp.h
View file @ e432dd3b
......@@ -80,6 +80,7 @@ struct lan743x_ptp {
unsigned long used_event_ch;
struct lan743x_ptp_perout perout[LAN743X_PTP_N_PEROUT];
int ptp_io_perout[LAN743X_PTP_N_PEROUT]; /* PTP event channel (0=channel A, 1=channel B) */
struct lan743x_extts extts[LAN743X_PTP_N_EXTTS];
bool leds_multiplexed;
......
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