646 lines
16 KiB
C
646 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* PTP 1588 clock for Freescale QorIQ 1588 timer
|
|
*
|
|
* Copyright (C) 2010 OMICRON electronics GmbH
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/hrtimer.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/timex.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/clk.h>
|
|
|
|
#include <linux/fsl/ptp_qoriq.h>
|
|
|
|
/*
|
|
* Register access functions
|
|
*/
|
|
|
|
/* Caller must hold ptp_qoriq->lock. */
|
|
static u64 tmr_cnt_read(struct ptp_qoriq *ptp_qoriq)
|
|
{
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
u64 ns;
|
|
u32 lo, hi;
|
|
|
|
lo = ptp_qoriq->read(®s->ctrl_regs->tmr_cnt_l);
|
|
hi = ptp_qoriq->read(®s->ctrl_regs->tmr_cnt_h);
|
|
ns = ((u64) hi) << 32;
|
|
ns |= lo;
|
|
return ns;
|
|
}
|
|
|
|
/* Caller must hold ptp_qoriq->lock. */
|
|
static void tmr_cnt_write(struct ptp_qoriq *ptp_qoriq, u64 ns)
|
|
{
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
u32 hi = ns >> 32;
|
|
u32 lo = ns & 0xffffffff;
|
|
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_cnt_l, lo);
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_cnt_h, hi);
|
|
}
|
|
|
|
/* Caller must hold ptp_qoriq->lock. */
|
|
static void set_alarm(struct ptp_qoriq *ptp_qoriq)
|
|
{
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
u64 ns;
|
|
u32 lo, hi;
|
|
|
|
ns = tmr_cnt_read(ptp_qoriq) + 1500000000ULL;
|
|
ns = div_u64(ns, 1000000000UL) * 1000000000ULL;
|
|
ns -= ptp_qoriq->tclk_period;
|
|
hi = ns >> 32;
|
|
lo = ns & 0xffffffff;
|
|
ptp_qoriq->write(®s->alarm_regs->tmr_alarm1_l, lo);
|
|
ptp_qoriq->write(®s->alarm_regs->tmr_alarm1_h, hi);
|
|
}
|
|
|
|
/* Caller must hold ptp_qoriq->lock. */
|
|
static void set_fipers(struct ptp_qoriq *ptp_qoriq)
|
|
{
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
|
|
set_alarm(ptp_qoriq);
|
|
ptp_qoriq->write(®s->fiper_regs->tmr_fiper1, ptp_qoriq->tmr_fiper1);
|
|
ptp_qoriq->write(®s->fiper_regs->tmr_fiper2, ptp_qoriq->tmr_fiper2);
|
|
|
|
if (ptp_qoriq->fiper3_support)
|
|
ptp_qoriq->write(®s->fiper_regs->tmr_fiper3,
|
|
ptp_qoriq->tmr_fiper3);
|
|
}
|
|
|
|
int extts_clean_up(struct ptp_qoriq *ptp_qoriq, int index, bool update_event)
|
|
{
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
struct ptp_clock_event event;
|
|
void __iomem *reg_etts_l;
|
|
void __iomem *reg_etts_h;
|
|
u32 valid, lo, hi;
|
|
|
|
switch (index) {
|
|
case 0:
|
|
valid = ETS1_VLD;
|
|
reg_etts_l = ®s->etts_regs->tmr_etts1_l;
|
|
reg_etts_h = ®s->etts_regs->tmr_etts1_h;
|
|
break;
|
|
case 1:
|
|
valid = ETS2_VLD;
|
|
reg_etts_l = ®s->etts_regs->tmr_etts2_l;
|
|
reg_etts_h = ®s->etts_regs->tmr_etts2_h;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
event.type = PTP_CLOCK_EXTTS;
|
|
event.index = index;
|
|
|
|
if (ptp_qoriq->extts_fifo_support)
|
|
if (!(ptp_qoriq->read(®s->ctrl_regs->tmr_stat) & valid))
|
|
return 0;
|
|
|
|
do {
|
|
lo = ptp_qoriq->read(reg_etts_l);
|
|
hi = ptp_qoriq->read(reg_etts_h);
|
|
|
|
if (update_event) {
|
|
event.timestamp = ((u64) hi) << 32;
|
|
event.timestamp |= lo;
|
|
ptp_clock_event(ptp_qoriq->clock, &event);
|
|
}
|
|
|
|
if (!ptp_qoriq->extts_fifo_support)
|
|
break;
|
|
} while (ptp_qoriq->read(®s->ctrl_regs->tmr_stat) & valid);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(extts_clean_up);
|
|
|
|
/*
|
|
* Interrupt service routine
|
|
*/
|
|
|
|
irqreturn_t ptp_qoriq_isr(int irq, void *priv)
|
|
{
|
|
struct ptp_qoriq *ptp_qoriq = priv;
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
struct ptp_clock_event event;
|
|
u32 ack = 0, mask, val, irqs;
|
|
|
|
spin_lock(&ptp_qoriq->lock);
|
|
|
|
val = ptp_qoriq->read(®s->ctrl_regs->tmr_tevent);
|
|
mask = ptp_qoriq->read(®s->ctrl_regs->tmr_temask);
|
|
|
|
spin_unlock(&ptp_qoriq->lock);
|
|
|
|
irqs = val & mask;
|
|
|
|
if (irqs & ETS1) {
|
|
ack |= ETS1;
|
|
extts_clean_up(ptp_qoriq, 0, true);
|
|
}
|
|
|
|
if (irqs & ETS2) {
|
|
ack |= ETS2;
|
|
extts_clean_up(ptp_qoriq, 1, true);
|
|
}
|
|
|
|
if (irqs & PP1) {
|
|
ack |= PP1;
|
|
event.type = PTP_CLOCK_PPS;
|
|
ptp_clock_event(ptp_qoriq->clock, &event);
|
|
}
|
|
|
|
if (ack) {
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_tevent, ack);
|
|
return IRQ_HANDLED;
|
|
} else
|
|
return IRQ_NONE;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ptp_qoriq_isr);
|
|
|
|
/*
|
|
* PTP clock operations
|
|
*/
|
|
|
|
int ptp_qoriq_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
|
|
{
|
|
u64 adj, diff;
|
|
u32 tmr_add;
|
|
int neg_adj = 0;
|
|
struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
|
|
if (scaled_ppm < 0) {
|
|
neg_adj = 1;
|
|
scaled_ppm = -scaled_ppm;
|
|
}
|
|
tmr_add = ptp_qoriq->tmr_add;
|
|
adj = tmr_add;
|
|
|
|
/*
|
|
* Calculate diff and round() to the nearest integer
|
|
*
|
|
* diff = adj * (ppb / 1000000000)
|
|
* = adj * scaled_ppm / 65536000000
|
|
*/
|
|
diff = mul_u64_u64_div_u64(adj, scaled_ppm, 32768000000);
|
|
diff = DIV64_U64_ROUND_UP(diff, 2);
|
|
|
|
tmr_add = neg_adj ? tmr_add - diff : tmr_add + diff;
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_add, tmr_add);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ptp_qoriq_adjfine);
|
|
|
|
int ptp_qoriq_adjtime(struct ptp_clock_info *ptp, s64 delta)
|
|
{
|
|
s64 now;
|
|
unsigned long flags;
|
|
struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
|
|
|
|
spin_lock_irqsave(&ptp_qoriq->lock, flags);
|
|
|
|
now = tmr_cnt_read(ptp_qoriq);
|
|
now += delta;
|
|
tmr_cnt_write(ptp_qoriq, now);
|
|
set_fipers(ptp_qoriq);
|
|
|
|
spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ptp_qoriq_adjtime);
|
|
|
|
int ptp_qoriq_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
|
|
{
|
|
u64 ns;
|
|
unsigned long flags;
|
|
struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
|
|
|
|
spin_lock_irqsave(&ptp_qoriq->lock, flags);
|
|
|
|
ns = tmr_cnt_read(ptp_qoriq);
|
|
|
|
spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
|
|
|
|
*ts = ns_to_timespec64(ns);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ptp_qoriq_gettime);
|
|
|
|
int ptp_qoriq_settime(struct ptp_clock_info *ptp,
|
|
const struct timespec64 *ts)
|
|
{
|
|
u64 ns;
|
|
unsigned long flags;
|
|
struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
|
|
|
|
ns = timespec64_to_ns(ts);
|
|
|
|
spin_lock_irqsave(&ptp_qoriq->lock, flags);
|
|
|
|
tmr_cnt_write(ptp_qoriq, ns);
|
|
set_fipers(ptp_qoriq);
|
|
|
|
spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ptp_qoriq_settime);
|
|
|
|
int ptp_qoriq_enable(struct ptp_clock_info *ptp,
|
|
struct ptp_clock_request *rq, int on)
|
|
{
|
|
struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
unsigned long flags;
|
|
u32 bit, mask = 0;
|
|
|
|
switch (rq->type) {
|
|
case PTP_CLK_REQ_EXTTS:
|
|
switch (rq->extts.index) {
|
|
case 0:
|
|
bit = ETS1EN;
|
|
break;
|
|
case 1:
|
|
bit = ETS2EN;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (on)
|
|
extts_clean_up(ptp_qoriq, rq->extts.index, false);
|
|
|
|
break;
|
|
case PTP_CLK_REQ_PPS:
|
|
bit = PP1EN;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
spin_lock_irqsave(&ptp_qoriq->lock, flags);
|
|
|
|
mask = ptp_qoriq->read(®s->ctrl_regs->tmr_temask);
|
|
if (on) {
|
|
mask |= bit;
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_tevent, bit);
|
|
} else {
|
|
mask &= ~bit;
|
|
}
|
|
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_temask, mask);
|
|
|
|
spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ptp_qoriq_enable);
|
|
|
|
static const struct ptp_clock_info ptp_qoriq_caps = {
|
|
.owner = THIS_MODULE,
|
|
.name = "qoriq ptp clock",
|
|
.max_adj = 512000,
|
|
.n_alarm = 0,
|
|
.n_ext_ts = N_EXT_TS,
|
|
.n_per_out = 0,
|
|
.n_pins = 0,
|
|
.pps = 1,
|
|
.adjfine = ptp_qoriq_adjfine,
|
|
.adjtime = ptp_qoriq_adjtime,
|
|
.gettime64 = ptp_qoriq_gettime,
|
|
.settime64 = ptp_qoriq_settime,
|
|
.enable = ptp_qoriq_enable,
|
|
};
|
|
|
|
/**
|
|
* ptp_qoriq_nominal_freq - calculate nominal frequency according to
|
|
* reference clock frequency
|
|
*
|
|
* @clk_src: reference clock frequency
|
|
*
|
|
* The nominal frequency is the desired clock frequency.
|
|
* It should be less than the reference clock frequency.
|
|
* It should be a factor of 1000MHz.
|
|
*
|
|
* Return the nominal frequency
|
|
*/
|
|
static u32 ptp_qoriq_nominal_freq(u32 clk_src)
|
|
{
|
|
u32 remainder = 0;
|
|
|
|
clk_src /= 1000000;
|
|
remainder = clk_src % 100;
|
|
if (remainder) {
|
|
clk_src -= remainder;
|
|
clk_src += 100;
|
|
}
|
|
|
|
do {
|
|
clk_src -= 100;
|
|
|
|
} while (1000 % clk_src);
|
|
|
|
return clk_src * 1000000;
|
|
}
|
|
|
|
/**
|
|
* ptp_qoriq_auto_config - calculate a set of default configurations
|
|
*
|
|
* @ptp_qoriq: pointer to ptp_qoriq
|
|
* @node: pointer to device_node
|
|
*
|
|
* If below dts properties are not provided, this function will be
|
|
* called to calculate a set of default configurations for them.
|
|
* "fsl,tclk-period"
|
|
* "fsl,tmr-prsc"
|
|
* "fsl,tmr-add"
|
|
* "fsl,tmr-fiper1"
|
|
* "fsl,tmr-fiper2"
|
|
* "fsl,tmr-fiper3" (required only for DPAA2 and ENETC hardware)
|
|
* "fsl,max-adj"
|
|
*
|
|
* Return 0 if success
|
|
*/
|
|
static int ptp_qoriq_auto_config(struct ptp_qoriq *ptp_qoriq,
|
|
struct device_node *node)
|
|
{
|
|
struct clk *clk;
|
|
u64 freq_comp;
|
|
u64 max_adj;
|
|
u32 nominal_freq;
|
|
u32 remainder = 0;
|
|
u32 clk_src = 0;
|
|
|
|
ptp_qoriq->cksel = DEFAULT_CKSEL;
|
|
|
|
clk = of_clk_get(node, 0);
|
|
if (!IS_ERR(clk)) {
|
|
clk_src = clk_get_rate(clk);
|
|
clk_put(clk);
|
|
}
|
|
|
|
if (clk_src <= 100000000UL) {
|
|
pr_err("error reference clock value, or lower than 100MHz\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
nominal_freq = ptp_qoriq_nominal_freq(clk_src);
|
|
if (!nominal_freq)
|
|
return -EINVAL;
|
|
|
|
ptp_qoriq->tclk_period = 1000000000UL / nominal_freq;
|
|
ptp_qoriq->tmr_prsc = DEFAULT_TMR_PRSC;
|
|
|
|
/* Calculate initial frequency compensation value for TMR_ADD register.
|
|
* freq_comp = ceil(2^32 / freq_ratio)
|
|
* freq_ratio = reference_clock_freq / nominal_freq
|
|
*/
|
|
freq_comp = ((u64)1 << 32) * nominal_freq;
|
|
freq_comp = div_u64_rem(freq_comp, clk_src, &remainder);
|
|
if (remainder)
|
|
freq_comp++;
|
|
|
|
ptp_qoriq->tmr_add = freq_comp;
|
|
ptp_qoriq->tmr_fiper1 = DEFAULT_FIPER1_PERIOD - ptp_qoriq->tclk_period;
|
|
ptp_qoriq->tmr_fiper2 = DEFAULT_FIPER2_PERIOD - ptp_qoriq->tclk_period;
|
|
ptp_qoriq->tmr_fiper3 = DEFAULT_FIPER3_PERIOD - ptp_qoriq->tclk_period;
|
|
|
|
/* max_adj = 1000000000 * (freq_ratio - 1.0) - 1
|
|
* freq_ratio = reference_clock_freq / nominal_freq
|
|
*/
|
|
max_adj = 1000000000ULL * (clk_src - nominal_freq);
|
|
max_adj = div_u64(max_adj, nominal_freq) - 1;
|
|
ptp_qoriq->caps.max_adj = max_adj;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ptp_qoriq_init(struct ptp_qoriq *ptp_qoriq, void __iomem *base,
|
|
const struct ptp_clock_info *caps)
|
|
{
|
|
struct device_node *node = ptp_qoriq->dev->of_node;
|
|
struct ptp_qoriq_registers *regs;
|
|
struct timespec64 now;
|
|
unsigned long flags;
|
|
u32 tmr_ctrl;
|
|
|
|
if (!node)
|
|
return -ENODEV;
|
|
|
|
ptp_qoriq->base = base;
|
|
ptp_qoriq->caps = *caps;
|
|
|
|
if (of_property_read_u32(node, "fsl,cksel", &ptp_qoriq->cksel))
|
|
ptp_qoriq->cksel = DEFAULT_CKSEL;
|
|
|
|
if (of_property_read_bool(node, "fsl,extts-fifo"))
|
|
ptp_qoriq->extts_fifo_support = true;
|
|
else
|
|
ptp_qoriq->extts_fifo_support = false;
|
|
|
|
if (of_device_is_compatible(node, "fsl,dpaa2-ptp") ||
|
|
of_device_is_compatible(node, "fsl,enetc-ptp"))
|
|
ptp_qoriq->fiper3_support = true;
|
|
|
|
if (of_property_read_u32(node,
|
|
"fsl,tclk-period", &ptp_qoriq->tclk_period) ||
|
|
of_property_read_u32(node,
|
|
"fsl,tmr-prsc", &ptp_qoriq->tmr_prsc) ||
|
|
of_property_read_u32(node,
|
|
"fsl,tmr-add", &ptp_qoriq->tmr_add) ||
|
|
of_property_read_u32(node,
|
|
"fsl,tmr-fiper1", &ptp_qoriq->tmr_fiper1) ||
|
|
of_property_read_u32(node,
|
|
"fsl,tmr-fiper2", &ptp_qoriq->tmr_fiper2) ||
|
|
of_property_read_u32(node,
|
|
"fsl,max-adj", &ptp_qoriq->caps.max_adj) ||
|
|
(ptp_qoriq->fiper3_support &&
|
|
of_property_read_u32(node, "fsl,tmr-fiper3",
|
|
&ptp_qoriq->tmr_fiper3))) {
|
|
pr_warn("device tree node missing required elements, try automatic configuration\n");
|
|
|
|
if (ptp_qoriq_auto_config(ptp_qoriq, node))
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (of_property_read_bool(node, "little-endian")) {
|
|
ptp_qoriq->read = qoriq_read_le;
|
|
ptp_qoriq->write = qoriq_write_le;
|
|
} else {
|
|
ptp_qoriq->read = qoriq_read_be;
|
|
ptp_qoriq->write = qoriq_write_be;
|
|
}
|
|
|
|
/* The eTSEC uses differnt memory map with DPAA/ENETC */
|
|
if (of_device_is_compatible(node, "fsl,etsec-ptp")) {
|
|
ptp_qoriq->regs.ctrl_regs = base + ETSEC_CTRL_REGS_OFFSET;
|
|
ptp_qoriq->regs.alarm_regs = base + ETSEC_ALARM_REGS_OFFSET;
|
|
ptp_qoriq->regs.fiper_regs = base + ETSEC_FIPER_REGS_OFFSET;
|
|
ptp_qoriq->regs.etts_regs = base + ETSEC_ETTS_REGS_OFFSET;
|
|
} else {
|
|
ptp_qoriq->regs.ctrl_regs = base + CTRL_REGS_OFFSET;
|
|
ptp_qoriq->regs.alarm_regs = base + ALARM_REGS_OFFSET;
|
|
ptp_qoriq->regs.fiper_regs = base + FIPER_REGS_OFFSET;
|
|
ptp_qoriq->regs.etts_regs = base + ETTS_REGS_OFFSET;
|
|
}
|
|
|
|
spin_lock_init(&ptp_qoriq->lock);
|
|
|
|
ktime_get_real_ts64(&now);
|
|
ptp_qoriq_settime(&ptp_qoriq->caps, &now);
|
|
|
|
tmr_ctrl =
|
|
(ptp_qoriq->tclk_period & TCLK_PERIOD_MASK) << TCLK_PERIOD_SHIFT |
|
|
(ptp_qoriq->cksel & CKSEL_MASK) << CKSEL_SHIFT;
|
|
|
|
spin_lock_irqsave(&ptp_qoriq->lock, flags);
|
|
|
|
regs = &ptp_qoriq->regs;
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_ctrl, tmr_ctrl);
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_add, ptp_qoriq->tmr_add);
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_prsc, ptp_qoriq->tmr_prsc);
|
|
ptp_qoriq->write(®s->fiper_regs->tmr_fiper1, ptp_qoriq->tmr_fiper1);
|
|
ptp_qoriq->write(®s->fiper_regs->tmr_fiper2, ptp_qoriq->tmr_fiper2);
|
|
|
|
if (ptp_qoriq->fiper3_support)
|
|
ptp_qoriq->write(®s->fiper_regs->tmr_fiper3,
|
|
ptp_qoriq->tmr_fiper3);
|
|
|
|
set_alarm(ptp_qoriq);
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_ctrl,
|
|
tmr_ctrl|FIPERST|RTPE|TE|FRD);
|
|
|
|
spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
|
|
|
|
ptp_qoriq->clock = ptp_clock_register(&ptp_qoriq->caps, ptp_qoriq->dev);
|
|
if (IS_ERR(ptp_qoriq->clock))
|
|
return PTR_ERR(ptp_qoriq->clock);
|
|
|
|
ptp_qoriq->phc_index = ptp_clock_index(ptp_qoriq->clock);
|
|
ptp_qoriq_create_debugfs(ptp_qoriq);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ptp_qoriq_init);
|
|
|
|
void ptp_qoriq_free(struct ptp_qoriq *ptp_qoriq)
|
|
{
|
|
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
|
|
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_temask, 0);
|
|
ptp_qoriq->write(®s->ctrl_regs->tmr_ctrl, 0);
|
|
|
|
ptp_qoriq_remove_debugfs(ptp_qoriq);
|
|
ptp_clock_unregister(ptp_qoriq->clock);
|
|
iounmap(ptp_qoriq->base);
|
|
free_irq(ptp_qoriq->irq, ptp_qoriq);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ptp_qoriq_free);
|
|
|
|
static int ptp_qoriq_probe(struct platform_device *dev)
|
|
{
|
|
struct ptp_qoriq *ptp_qoriq;
|
|
int err = -ENOMEM;
|
|
void __iomem *base;
|
|
|
|
ptp_qoriq = kzalloc(sizeof(*ptp_qoriq), GFP_KERNEL);
|
|
if (!ptp_qoriq)
|
|
goto no_memory;
|
|
|
|
ptp_qoriq->dev = &dev->dev;
|
|
|
|
err = -ENODEV;
|
|
|
|
ptp_qoriq->irq = platform_get_irq(dev, 0);
|
|
if (ptp_qoriq->irq < 0) {
|
|
pr_err("irq not in device tree\n");
|
|
goto no_node;
|
|
}
|
|
if (request_irq(ptp_qoriq->irq, ptp_qoriq_isr, IRQF_SHARED,
|
|
DRIVER, ptp_qoriq)) {
|
|
pr_err("request_irq failed\n");
|
|
goto no_node;
|
|
}
|
|
|
|
ptp_qoriq->rsrc = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
|
if (!ptp_qoriq->rsrc) {
|
|
pr_err("no resource\n");
|
|
goto no_resource;
|
|
}
|
|
if (request_resource(&iomem_resource, ptp_qoriq->rsrc)) {
|
|
pr_err("resource busy\n");
|
|
goto no_resource;
|
|
}
|
|
|
|
base = ioremap(ptp_qoriq->rsrc->start,
|
|
resource_size(ptp_qoriq->rsrc));
|
|
if (!base) {
|
|
pr_err("ioremap ptp registers failed\n");
|
|
goto no_ioremap;
|
|
}
|
|
|
|
err = ptp_qoriq_init(ptp_qoriq, base, &ptp_qoriq_caps);
|
|
if (err)
|
|
goto no_clock;
|
|
|
|
platform_set_drvdata(dev, ptp_qoriq);
|
|
return 0;
|
|
|
|
no_clock:
|
|
iounmap(base);
|
|
no_ioremap:
|
|
release_resource(ptp_qoriq->rsrc);
|
|
no_resource:
|
|
free_irq(ptp_qoriq->irq, ptp_qoriq);
|
|
no_node:
|
|
kfree(ptp_qoriq);
|
|
no_memory:
|
|
return err;
|
|
}
|
|
|
|
static int ptp_qoriq_remove(struct platform_device *dev)
|
|
{
|
|
struct ptp_qoriq *ptp_qoriq = platform_get_drvdata(dev);
|
|
|
|
ptp_qoriq_free(ptp_qoriq);
|
|
release_resource(ptp_qoriq->rsrc);
|
|
kfree(ptp_qoriq);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id match_table[] = {
|
|
{ .compatible = "fsl,etsec-ptp" },
|
|
{ .compatible = "fsl,fman-ptp-timer" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, match_table);
|
|
|
|
static struct platform_driver ptp_qoriq_driver = {
|
|
.driver = {
|
|
.name = "ptp_qoriq",
|
|
.of_match_table = match_table,
|
|
},
|
|
.probe = ptp_qoriq_probe,
|
|
.remove = ptp_qoriq_remove,
|
|
};
|
|
|
|
module_platform_driver(ptp_qoriq_driver);
|
|
|
|
MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
|
|
MODULE_DESCRIPTION("PTP clock for Freescale QorIQ 1588 timer");
|
|
MODULE_LICENSE("GPL");
|