blob: 52d77db39829295c614434b4a6d64934905c7aa0 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2018 MOSER-BAER AG
//
#define pr_fmt(fmt) "InES_PTP: " fmt
#include <linux/ethtool.h>
#include <linux/export.h>
#include <linux/if_vlan.h>
#include <linux/mii_timestamper.h>
#include <linux/module.h>
#include <linux/net_tstamp.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include <linux/ptp_classify.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/stddef.h>
MODULE_DESCRIPTION("Driver for the ZHAW InES PTP time stamping IP core");
MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");
/* GLOBAL register */
#define MCAST_MAC_SELECT_SHIFT 2
#define MCAST_MAC_SELECT_MASK 0x3
#define IO_RESET BIT(1)
#define PTP_RESET BIT(0)
/* VERSION register */
#define IF_MAJOR_VER_SHIFT 12
#define IF_MAJOR_VER_MASK 0xf
#define IF_MINOR_VER_SHIFT 8
#define IF_MINOR_VER_MASK 0xf
#define FPGA_MAJOR_VER_SHIFT 4
#define FPGA_MAJOR_VER_MASK 0xf
#define FPGA_MINOR_VER_SHIFT 0
#define FPGA_MINOR_VER_MASK 0xf
/* INT_STAT register */
#define RX_INTR_STATUS_3 BIT(5)
#define RX_INTR_STATUS_2 BIT(4)
#define RX_INTR_STATUS_1 BIT(3)
#define TX_INTR_STATUS_3 BIT(2)
#define TX_INTR_STATUS_2 BIT(1)
#define TX_INTR_STATUS_1 BIT(0)
/* INT_MSK register */
#define RX_INTR_MASK_3 BIT(5)
#define RX_INTR_MASK_2 BIT(4)
#define RX_INTR_MASK_1 BIT(3)
#define TX_INTR_MASK_3 BIT(2)
#define TX_INTR_MASK_2 BIT(1)
#define TX_INTR_MASK_1 BIT(0)
/* BUF_STAT register */
#define RX_FIFO_NE_3 BIT(5)
#define RX_FIFO_NE_2 BIT(4)
#define RX_FIFO_NE_1 BIT(3)
#define TX_FIFO_NE_3 BIT(2)
#define TX_FIFO_NE_2 BIT(1)
#define TX_FIFO_NE_1 BIT(0)
/* PORT_CONF register */
#define CM_ONE_STEP BIT(6)
#define PHY_SPEED_SHIFT 4
#define PHY_SPEED_MASK 0x3
#define P2P_DELAY_WR_POS_SHIFT 2
#define P2P_DELAY_WR_POS_MASK 0x3
#define PTP_MODE_SHIFT 0
#define PTP_MODE_MASK 0x3
/* TS_STAT_TX register */
#define TS_ENABLE BIT(15)
#define DATA_READ_POS_SHIFT 8
#define DATA_READ_POS_MASK 0x1f
#define DISCARDED_EVENTS_SHIFT 4
#define DISCARDED_EVENTS_MASK 0xf
#define INES_N_PORTS 3
#define INES_REGISTER_SIZE 0x80
#define INES_PORT_OFFSET 0x20
#define INES_PORT_SIZE 0x20
#define INES_FIFO_DEPTH 90
#define INES_MAX_EVENTS 100
#define BC_PTP_V1 0
#define BC_PTP_V2 1
#define TC_E2E_PTP_V2 2
#define TC_P2P_PTP_V2 3
#define OFF_PTP_CLOCK_ID 20
#define OFF_PTP_PORT_NUM 28
#define PHY_SPEED_10 0
#define PHY_SPEED_100 1
#define PHY_SPEED_1000 2
#define PORT_CONF \
((PHY_SPEED_1000 << PHY_SPEED_SHIFT) | (BC_PTP_V2 << PTP_MODE_SHIFT))
#define ines_read32(s, r) __raw_readl((void __iomem *)&s->regs->r)
#define ines_write32(s, v, r) __raw_writel(v, (void __iomem *)&s->regs->r)
#define MESSAGE_TYPE_SYNC 1
#define MESSAGE_TYPE_P_DELAY_REQ 2
#define MESSAGE_TYPE_P_DELAY_RESP 3
#define MESSAGE_TYPE_DELAY_REQ 4
#define SYNC 0x0
#define DELAY_REQ 0x1
#define PDELAY_REQ 0x2
#define PDELAY_RESP 0x3
static LIST_HEAD(ines_clocks);
static DEFINE_MUTEX(ines_clocks_lock);
struct ines_global_regs {
u32 id;
u32 test;
u32 global;
u32 version;
u32 test2;
u32 int_stat;
u32 int_msk;
u32 buf_stat;
};
struct ines_port_registers {
u32 port_conf;
u32 p_delay;
u32 ts_stat_tx;
u32 ts_stat_rx;
u32 ts_tx;
u32 ts_rx;
};
struct ines_timestamp {
struct list_head list;
unsigned long tmo;
u16 tag;
u64 sec;
u64 nsec;
u64 clkid;
u16 portnum;
u16 seqid;
};
struct ines_port {
struct ines_port_registers *regs;
struct mii_timestamper mii_ts;
struct ines_clock *clock;
bool rxts_enabled;
bool txts_enabled;
unsigned int index;
struct delayed_work ts_work;
/* lock protects event list and tx_skb */
spinlock_t lock;
struct sk_buff *tx_skb;
struct list_head events;
struct list_head pool;
struct ines_timestamp pool_data[INES_MAX_EVENTS];
};
struct ines_clock {
struct ines_port port[INES_N_PORTS];
struct ines_global_regs __iomem *regs;
void __iomem *base;
struct device_node *node;
struct device *dev;
struct list_head list;
};
static bool ines_match(struct sk_buff *skb, unsigned int ptp_class,
struct ines_timestamp *ts, struct device *dev);
static int ines_rxfifo_read(struct ines_port *port);
static u64 ines_rxts64(struct ines_port *port, unsigned int words);
static bool ines_timestamp_expired(struct ines_timestamp *ts);
static u64 ines_txts64(struct ines_port *port, unsigned int words);
static void ines_txtstamp_work(struct work_struct *work);
static bool is_sync_pdelay_resp(struct sk_buff *skb, int type);
static u8 tag_to_msgtype(u8 tag);
static void ines_clock_cleanup(struct ines_clock *clock)
{
struct ines_port *port;
int i;
for (i = 0; i < INES_N_PORTS; i++) {
port = &clock->port[i];
cancel_delayed_work_sync(&port->ts_work);
}
}
static int ines_clock_init(struct ines_clock *clock, struct device *device,
void __iomem *addr)
{
struct device_node *node = device->of_node;
unsigned long port_addr;
struct ines_port *port;
int i, j;
INIT_LIST_HEAD(&clock->list);
clock->node = node;
clock->dev = device;
clock->base = addr;
clock->regs = clock->base;
for (i = 0; i < INES_N_PORTS; i++) {
port = &clock->port[i];
port_addr = (unsigned long) clock->base +
INES_PORT_OFFSET + i * INES_PORT_SIZE;
port->regs = (struct ines_port_registers *) port_addr;
port->clock = clock;
port->index = i;
INIT_DELAYED_WORK(&port->ts_work, ines_txtstamp_work);
spin_lock_init(&port->lock);
INIT_LIST_HEAD(&port->events);
INIT_LIST_HEAD(&port->pool);
for (j = 0; j < INES_MAX_EVENTS; j++)
list_add(&port->pool_data[j].list, &port->pool);
}
ines_write32(clock, 0xBEEF, test);
ines_write32(clock, 0xBEEF, test2);
dev_dbg(device, "ID 0x%x\n", ines_read32(clock, id));
dev_dbg(device, "TEST 0x%x\n", ines_read32(clock, test));
dev_dbg(device, "VERSION 0x%x\n", ines_read32(clock, version));
dev_dbg(device, "TEST2 0x%x\n", ines_read32(clock, test2));
for (i = 0; i < INES_N_PORTS; i++) {
port = &clock->port[i];
ines_write32(port, PORT_CONF, port_conf);
}
return 0;
}
static struct ines_port *ines_find_port(struct device_node *node, u32 index)
{
struct ines_port *port = NULL;
struct ines_clock *clock;
struct list_head *this;
mutex_lock(&ines_clocks_lock);
list_for_each(this, &ines_clocks) {
clock = list_entry(this, struct ines_clock, list);
if (clock->node == node) {
port = &clock->port[index];
break;
}
}
mutex_unlock(&ines_clocks_lock);
return port;
}
static u64 ines_find_rxts(struct ines_port *port, struct sk_buff *skb, int type)
{
struct list_head *this, *next;
struct ines_timestamp *ts;
unsigned long flags;
u64 ns = 0;
if (type == PTP_CLASS_NONE)
return 0;
spin_lock_irqsave(&port->lock, flags);
ines_rxfifo_read(port);
list_for_each_safe(this, next, &port->events) {
ts = list_entry(this, struct ines_timestamp, list);
if (ines_timestamp_expired(ts)) {
list_del_init(&ts->list);
list_add(&ts->list, &port->pool);
continue;
}
if (ines_match(skb, type, ts, port->clock->dev)) {
ns = ts->sec * 1000000000ULL + ts->nsec;
list_del_init(&ts->list);
list_add(&ts->list, &port->pool);
break;
}
}
spin_unlock_irqrestore(&port->lock, flags);
return ns;
}
static u64 ines_find_txts(struct ines_port *port, struct sk_buff *skb)
{
unsigned int class = ptp_classify_raw(skb), i;
u32 data_rd_pos, buf_stat, mask, ts_stat_tx;
struct ines_timestamp ts;
unsigned long flags;
u64 ns = 0;
mask = TX_FIFO_NE_1 << port->index;
spin_lock_irqsave(&port->lock, flags);
for (i = 0; i < INES_FIFO_DEPTH; i++) {
buf_stat = ines_read32(port->clock, buf_stat);
if (!(buf_stat & mask)) {
dev_dbg(port->clock->dev,
"Tx timestamp FIFO unexpectedly empty\n");
break;
}
ts_stat_tx = ines_read32(port, ts_stat_tx);
data_rd_pos = (ts_stat_tx >> DATA_READ_POS_SHIFT) &
DATA_READ_POS_MASK;
if (data_rd_pos) {
dev_err(port->clock->dev,
"unexpected Tx read pos %u\n", data_rd_pos);
break;
}
ts.tag = ines_read32(port, ts_tx);
ts.sec = ines_txts64(port, 3);
ts.nsec = ines_txts64(port, 2);
ts.clkid = ines_txts64(port, 4);
ts.portnum = ines_read32(port, ts_tx);
ts.seqid = ines_read32(port, ts_tx);
if (ines_match(skb, class, &ts, port->clock->dev)) {
ns = ts.sec * 1000000000ULL + ts.nsec;
break;
}
}
spin_unlock_irqrestore(&port->lock, flags);
return ns;
}
static int ines_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
{
struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
u32 cm_one_step = 0, port_conf, ts_stat_rx, ts_stat_tx;
struct hwtstamp_config cfg;
unsigned long flags;
if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
return -EFAULT;
/* reserved for future extensions */
if (cfg.flags)
return -EINVAL;
switch (cfg.tx_type) {
case HWTSTAMP_TX_OFF:
ts_stat_tx = 0;
break;
case HWTSTAMP_TX_ON:
ts_stat_tx = TS_ENABLE;
break;
case HWTSTAMP_TX_ONESTEP_P2P:
ts_stat_tx = TS_ENABLE;
cm_one_step = CM_ONE_STEP;
break;
default:
return -ERANGE;
}
switch (cfg.rx_filter) {
case HWTSTAMP_FILTER_NONE:
ts_stat_rx = 0;
break;
case HWTSTAMP_FILTER_ALL:
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
return -ERANGE;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
ts_stat_rx = TS_ENABLE;
cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
break;
default:
return -ERANGE;
}
spin_lock_irqsave(&port->lock, flags);
port_conf = ines_read32(port, port_conf);
port_conf &= ~CM_ONE_STEP;
port_conf |= cm_one_step;
ines_write32(port, port_conf, port_conf);
ines_write32(port, ts_stat_rx, ts_stat_rx);
ines_write32(port, ts_stat_tx, ts_stat_tx);
port->rxts_enabled = ts_stat_rx == TS_ENABLE;
port->txts_enabled = ts_stat_tx == TS_ENABLE;
spin_unlock_irqrestore(&port->lock, flags);
return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
}
static void ines_link_state(struct mii_timestamper *mii_ts,
struct phy_device *phydev)
{
struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
u32 port_conf, speed_conf;
unsigned long flags;
switch (phydev->speed) {
case SPEED_10:
speed_conf = PHY_SPEED_10 << PHY_SPEED_SHIFT;
break;
case SPEED_100:
speed_conf = PHY_SPEED_100 << PHY_SPEED_SHIFT;
break;
case SPEED_1000:
speed_conf = PHY_SPEED_1000 << PHY_SPEED_SHIFT;
break;
default:
dev_err(port->clock->dev, "bad speed: %d\n", phydev->speed);
return;
}
spin_lock_irqsave(&port->lock, flags);
port_conf = ines_read32(port, port_conf);
port_conf &= ~(0x3 << PHY_SPEED_SHIFT);
port_conf |= speed_conf;
ines_write32(port, port_conf, port_conf);
spin_unlock_irqrestore(&port->lock, flags);
}
static bool ines_match(struct sk_buff *skb, unsigned int ptp_class,
struct ines_timestamp *ts, struct device *dev)
{
u8 *msgtype, *data = skb_mac_header(skb);
unsigned int offset = 0;
__be16 *portn, *seqid;
__be64 *clkid;
if (unlikely(ptp_class & PTP_CLASS_V1))
return false;
if (ptp_class & PTP_CLASS_VLAN)
offset += VLAN_HLEN;
switch (ptp_class & PTP_CLASS_PMASK) {
case PTP_CLASS_IPV4:
offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN;
break;
case PTP_CLASS_IPV6:
offset += ETH_HLEN + IP6_HLEN + UDP_HLEN;
break;
case PTP_CLASS_L2:
offset += ETH_HLEN;
break;
default:
return false;
}
if (skb->len + ETH_HLEN < offset + OFF_PTP_SEQUENCE_ID + sizeof(*seqid))
return false;
msgtype = data + offset;
clkid = (__be64 *)(data + offset + OFF_PTP_CLOCK_ID);
portn = (__be16 *)(data + offset + OFF_PTP_PORT_NUM);
seqid = (__be16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
if (tag_to_msgtype(ts->tag & 0x7) != (*msgtype & 0xf)) {
dev_dbg(dev, "msgtype mismatch ts %hhu != skb %hhu\n",
tag_to_msgtype(ts->tag & 0x7), *msgtype & 0xf);
return false;
}
if (cpu_to_be64(ts->clkid) != *clkid) {
dev_dbg(dev, "clkid mismatch ts %llx != skb %llx\n",
cpu_to_be64(ts->clkid), *clkid);
return false;
}
if (ts->portnum != ntohs(*portn)) {
dev_dbg(dev, "portn mismatch ts %hu != skb %hu\n",
ts->portnum, ntohs(*portn));
return false;
}
if (ts->seqid != ntohs(*seqid)) {
dev_dbg(dev, "seqid mismatch ts %hu != skb %hu\n",
ts->seqid, ntohs(*seqid));
return false;
}
return true;
}
static bool ines_rxtstamp(struct mii_timestamper *mii_ts,
struct sk_buff *skb, int type)
{
struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
struct skb_shared_hwtstamps *ssh;
u64 ns;
if (!port->rxts_enabled)
return false;
ns = ines_find_rxts(port, skb, type);
if (!ns)
return false;
ssh = skb_hwtstamps(skb);
ssh->hwtstamp = ns_to_ktime(ns);
netif_rx(skb);
return true;
}
static int ines_rxfifo_read(struct ines_port *port)
{
u32 data_rd_pos, buf_stat, mask, ts_stat_rx;
struct ines_timestamp *ts;
unsigned int i;
mask = RX_FIFO_NE_1 << port->index;
for (i = 0; i < INES_FIFO_DEPTH; i++) {
if (list_empty(&port->pool)) {
dev_err(port->clock->dev, "event pool is empty\n");
return -1;
}
buf_stat = ines_read32(port->clock, buf_stat);
if (!(buf_stat & mask))
break;
ts_stat_rx = ines_read32(port, ts_stat_rx);
data_rd_pos = (ts_stat_rx >> DATA_READ_POS_SHIFT) &
DATA_READ_POS_MASK;
if (data_rd_pos) {
dev_err(port->clock->dev, "unexpected Rx read pos %u\n",
data_rd_pos);
break;
}
ts = list_first_entry(&port->pool, struct ines_timestamp, list);
ts->tmo = jiffies + HZ;
ts->tag = ines_read32(port, ts_rx);
ts->sec = ines_rxts64(port, 3);
ts->nsec = ines_rxts64(port, 2);
ts->clkid = ines_rxts64(port, 4);
ts->portnum = ines_read32(port, ts_rx);
ts->seqid = ines_read32(port, ts_rx);
list_del_init(&ts->list);
list_add_tail(&ts->list, &port->events);
}
return 0;
}
static u64 ines_rxts64(struct ines_port *port, unsigned int words)
{
unsigned int i;
u64 result;
u16 word;
word = ines_read32(port, ts_rx);
result = word;
words--;
for (i = 0; i < words; i++) {
word = ines_read32(port, ts_rx);
result <<= 16;
result |= word;
}
return result;
}
static bool ines_timestamp_expired(struct ines_timestamp *ts)
{
return time_after(jiffies, ts->tmo);
}
static int ines_ts_info(struct mii_timestamper *mii_ts,
struct ethtool_ts_info *info)
{
info->so_timestamping =
SOF_TIMESTAMPING_TX_HARDWARE |
SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_RX_HARDWARE |
SOF_TIMESTAMPING_RX_SOFTWARE |
SOF_TIMESTAMPING_SOFTWARE |
SOF_TIMESTAMPING_RAW_HARDWARE;
info->phc_index = -1;
info->tx_types =
(1 << HWTSTAMP_TX_OFF) |
(1 << HWTSTAMP_TX_ON) |
(1 << HWTSTAMP_TX_ONESTEP_P2P);
info->rx_filters =
(1 << HWTSTAMP_FILTER_NONE) |
(1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
return 0;
}
static u64 ines_txts64(struct ines_port *port, unsigned int words)
{
unsigned int i;
u64 result;
u16 word;
word = ines_read32(port, ts_tx);
result = word;
words--;
for (i = 0; i < words; i++) {
word = ines_read32(port, ts_tx);
result <<= 16;
result |= word;
}
return result;
}
static bool ines_txts_onestep(struct ines_port *port, struct sk_buff *skb, int type)
{
unsigned long flags;
u32 port_conf;
spin_lock_irqsave(&port->lock, flags);
port_conf = ines_read32(port, port_conf);
spin_unlock_irqrestore(&port->lock, flags);
if (port_conf & CM_ONE_STEP)
return is_sync_pdelay_resp(skb, type);
return false;
}
static void ines_txtstamp(struct mii_timestamper *mii_ts,
struct sk_buff *skb, int type)
{
struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
struct sk_buff *old_skb = NULL;
unsigned long flags;
if (!port->txts_enabled || ines_txts_onestep(port, skb, type)) {
kfree_skb(skb);
return;
}
spin_lock_irqsave(&port->lock, flags);
if (port->tx_skb)
old_skb = port->tx_skb;
port->tx_skb = skb;
spin_unlock_irqrestore(&port->lock, flags);
if (old_skb)
kfree_skb(old_skb);
schedule_delayed_work(&port->ts_work, 1);
}
static void ines_txtstamp_work(struct work_struct *work)
{
struct ines_port *port =
container_of(work, struct ines_port, ts_work.work);
struct skb_shared_hwtstamps ssh;
struct sk_buff *skb;
unsigned long flags;
u64 ns;
spin_lock_irqsave(&port->lock, flags);
skb = port->tx_skb;
port->tx_skb = NULL;
spin_unlock_irqrestore(&port->lock, flags);
ns = ines_find_txts(port, skb);
if (!ns) {
kfree_skb(skb);
return;
}
ssh.hwtstamp = ns_to_ktime(ns);
skb_complete_tx_timestamp(skb, &ssh);
}
static bool is_sync_pdelay_resp(struct sk_buff *skb, int type)
{
u8 *data = skb->data, *msgtype;
unsigned int offset = 0;
if (type & PTP_CLASS_VLAN)
offset += VLAN_HLEN;
switch (type & PTP_CLASS_PMASK) {
case PTP_CLASS_IPV4:
offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN;
break;
case PTP_CLASS_IPV6:
offset += ETH_HLEN + IP6_HLEN + UDP_HLEN;
break;
case PTP_CLASS_L2:
offset += ETH_HLEN;
break;
default:
return 0;
}
if (type & PTP_CLASS_V1)
offset += OFF_PTP_CONTROL;
if (skb->len < offset + 1)
return 0;
msgtype = data + offset;
switch ((*msgtype & 0xf)) {
case SYNC:
case PDELAY_RESP:
return true;
default:
return false;
}
}
static u8 tag_to_msgtype(u8 tag)
{
switch (tag) {
case MESSAGE_TYPE_SYNC:
return SYNC;
case MESSAGE_TYPE_P_DELAY_REQ:
return PDELAY_REQ;
case MESSAGE_TYPE_P_DELAY_RESP:
return PDELAY_RESP;
case MESSAGE_TYPE_DELAY_REQ:
return DELAY_REQ;
}
return 0xf;
}
static struct mii_timestamper *ines_ptp_probe_channel(struct device *device,
unsigned int index)
{
struct device_node *node = device->of_node;
struct ines_port *port;
if (index > INES_N_PORTS - 1) {
dev_err(device, "bad port index %u\n", index);
return ERR_PTR(-EINVAL);
}
port = ines_find_port(node, index);
if (!port) {
dev_err(device, "missing port index %u\n", index);
return ERR_PTR(-ENODEV);
}
port->mii_ts.rxtstamp = ines_rxtstamp;
port->mii_ts.txtstamp = ines_txtstamp;
port->mii_ts.hwtstamp = ines_hwtstamp;
port->mii_ts.link_state = ines_link_state;
port->mii_ts.ts_info = ines_ts_info;
return &port->mii_ts;
}
static void ines_ptp_release_channel(struct device *device,
struct mii_timestamper *mii_ts)
{
}
static struct mii_timestamping_ctrl ines_ctrl = {
.probe_channel = ines_ptp_probe_channel,
.release_channel = ines_ptp_release_channel,
};
static int ines_ptp_ctrl_probe(struct platform_device *pld)
{
struct ines_clock *clock;
struct resource *res;
void __iomem *addr;
int err = 0;
res = platform_get_resource(pld, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pld->dev, "missing memory resource\n");
return -EINVAL;
}
addr = devm_ioremap_resource(&pld->dev, res);
if (IS_ERR(addr)) {
err = PTR_ERR(addr);
goto out;
}
clock = kzalloc(sizeof(*clock), GFP_KERNEL);
if (!clock) {
err = -ENOMEM;
goto out;
}
if (ines_clock_init(clock, &pld->dev, addr)) {
kfree(clock);
err = -ENOMEM;
goto out;
}
err = register_mii_tstamp_controller(&pld->dev, &ines_ctrl);
if (err) {
kfree(clock);
goto out;
}
mutex_lock(&ines_clocks_lock);
list_add_tail(&ines_clocks, &clock->list);
mutex_unlock(&ines_clocks_lock);
dev_set_drvdata(&pld->dev, clock);
out:
return err;
}
static int ines_ptp_ctrl_remove(struct platform_device *pld)
{
struct ines_clock *clock = dev_get_drvdata(&pld->dev);
unregister_mii_tstamp_controller(&pld->dev);
mutex_lock(&ines_clocks_lock);
list_del(&clock->list);
mutex_unlock(&ines_clocks_lock);
ines_clock_cleanup(clock);
kfree(clock);
return 0;
}
static const struct of_device_id ines_ptp_ctrl_of_match[] = {
{ .compatible = "ines,ptp-ctrl" },
{ }
};
MODULE_DEVICE_TABLE(of, ines_ptp_ctrl_of_match);
static struct platform_driver ines_ptp_ctrl_driver = {
.probe = ines_ptp_ctrl_probe,
.remove = ines_ptp_ctrl_remove,
.driver = {
.name = "ines_ptp_ctrl",
.of_match_table = of_match_ptr(ines_ptp_ctrl_of_match),
},
};
module_platform_driver(ines_ptp_ctrl_driver);