diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/net/phy/dp83640.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/net/phy/dp83640.c | 1257 |
1 files changed, 0 insertions, 1257 deletions
diff --git a/ANDROID_3.4.5/drivers/net/phy/dp83640.c b/ANDROID_3.4.5/drivers/net/phy/dp83640.c deleted file mode 100644 index dd7ae195..00000000 --- a/ANDROID_3.4.5/drivers/net/phy/dp83640.c +++ /dev/null @@ -1,1257 +0,0 @@ -/* - * Driver for the National Semiconductor DP83640 PHYTER - * - * Copyright (C) 2010 OMICRON electronics GmbH - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ -#include <linux/ethtool.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/mii.h> -#include <linux/module.h> -#include <linux/net_tstamp.h> -#include <linux/netdevice.h> -#include <linux/phy.h> -#include <linux/ptp_classify.h> -#include <linux/ptp_clock_kernel.h> - -#include "dp83640_reg.h" - -#define DP83640_PHY_ID 0x20005ce1 -#define PAGESEL 0x13 -#define LAYER4 0x02 -#define LAYER2 0x01 -#define MAX_RXTS 64 -#define N_EXT_TS 6 -#define PSF_PTPVER 2 -#define PSF_EVNT 0x4000 -#define PSF_RX 0x2000 -#define PSF_TX 0x1000 -#define EXT_EVENT 1 -#define CAL_EVENT 7 -#define CAL_TRIGGER 7 -#define PER_TRIGGER 6 - -/* phyter seems to miss the mark by 16 ns */ -#define ADJTIME_FIX 16 - -#if defined(__BIG_ENDIAN) -#define ENDIAN_FLAG 0 -#elif defined(__LITTLE_ENDIAN) -#define ENDIAN_FLAG PSF_ENDIAN -#endif - -#define SKB_PTP_TYPE(__skb) (*(unsigned int *)((__skb)->cb)) - -struct phy_rxts { - u16 ns_lo; /* ns[15:0] */ - u16 ns_hi; /* overflow[1:0], ns[29:16] */ - u16 sec_lo; /* sec[15:0] */ - u16 sec_hi; /* sec[31:16] */ - u16 seqid; /* sequenceId[15:0] */ - u16 msgtype; /* messageType[3:0], hash[11:0] */ -}; - -struct phy_txts { - u16 ns_lo; /* ns[15:0] */ - u16 ns_hi; /* overflow[1:0], ns[29:16] */ - u16 sec_lo; /* sec[15:0] */ - u16 sec_hi; /* sec[31:16] */ -}; - -struct rxts { - struct list_head list; - unsigned long tmo; - u64 ns; - u16 seqid; - u8 msgtype; - u16 hash; -}; - -struct dp83640_clock; - -struct dp83640_private { - struct list_head list; - struct dp83640_clock *clock; - struct phy_device *phydev; - struct work_struct ts_work; - int hwts_tx_en; - int hwts_rx_en; - int layer; - int version; - /* remember state of cfg0 during calibration */ - int cfg0; - /* remember the last event time stamp */ - struct phy_txts edata; - /* list of rx timestamps */ - struct list_head rxts; - struct list_head rxpool; - struct rxts rx_pool_data[MAX_RXTS]; - /* protects above three fields from concurrent access */ - spinlock_t rx_lock; - /* queues of incoming and outgoing packets */ - struct sk_buff_head rx_queue; - struct sk_buff_head tx_queue; -}; - -struct dp83640_clock { - /* keeps the instance in the 'phyter_clocks' list */ - struct list_head list; - /* we create one clock instance per MII bus */ - struct mii_bus *bus; - /* protects extended registers from concurrent access */ - struct mutex extreg_lock; - /* remembers which page was last selected */ - int page; - /* our advertised capabilities */ - struct ptp_clock_info caps; - /* protects the three fields below from concurrent access */ - struct mutex clock_lock; - /* the one phyter from which we shall read */ - struct dp83640_private *chosen; - /* list of the other attached phyters, not chosen */ - struct list_head phylist; - /* reference to our PTP hardware clock */ - struct ptp_clock *ptp_clock; -}; - -/* globals */ - -enum { - CALIBRATE_GPIO, - PEROUT_GPIO, - EXTTS0_GPIO, - EXTTS1_GPIO, - EXTTS2_GPIO, - EXTTS3_GPIO, - EXTTS4_GPIO, - EXTTS5_GPIO, - GPIO_TABLE_SIZE -}; - -static int chosen_phy = -1; -static ushort gpio_tab[GPIO_TABLE_SIZE] = { - 1, 2, 3, 4, 8, 9, 10, 11 -}; - -module_param(chosen_phy, int, 0444); -module_param_array(gpio_tab, ushort, NULL, 0444); - -MODULE_PARM_DESC(chosen_phy, \ - "The address of the PHY to use for the ancillary clock features"); -MODULE_PARM_DESC(gpio_tab, \ - "Which GPIO line to use for which purpose: cal,perout,extts1,...,extts6"); - -/* a list of clocks and a mutex to protect it */ -static LIST_HEAD(phyter_clocks); -static DEFINE_MUTEX(phyter_clocks_lock); - -static void rx_timestamp_work(struct work_struct *work); - -/* extended register access functions */ - -#define BROADCAST_ADDR 31 - -static inline int broadcast_write(struct mii_bus *bus, u32 regnum, u16 val) -{ - return mdiobus_write(bus, BROADCAST_ADDR, regnum, val); -} - -/* Caller must hold extreg_lock. */ -static int ext_read(struct phy_device *phydev, int page, u32 regnum) -{ - struct dp83640_private *dp83640 = phydev->priv; - int val; - - if (dp83640->clock->page != page) { - broadcast_write(phydev->bus, PAGESEL, page); - dp83640->clock->page = page; - } - val = phy_read(phydev, regnum); - - return val; -} - -/* Caller must hold extreg_lock. */ -static void ext_write(int broadcast, struct phy_device *phydev, - int page, u32 regnum, u16 val) -{ - struct dp83640_private *dp83640 = phydev->priv; - - if (dp83640->clock->page != page) { - broadcast_write(phydev->bus, PAGESEL, page); - dp83640->clock->page = page; - } - if (broadcast) - broadcast_write(phydev->bus, regnum, val); - else - phy_write(phydev, regnum, val); -} - -/* Caller must hold extreg_lock. */ -static int tdr_write(int bc, struct phy_device *dev, - const struct timespec *ts, u16 cmd) -{ - ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec & 0xffff);/* ns[15:0] */ - ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec >> 16); /* ns[31:16] */ - ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec & 0xffff); /* sec[15:0] */ - ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec >> 16); /* sec[31:16]*/ - - ext_write(bc, dev, PAGE4, PTP_CTL, cmd); - - return 0; -} - -/* convert phy timestamps into driver timestamps */ - -static void phy2rxts(struct phy_rxts *p, struct rxts *rxts) -{ - u32 sec; - - sec = p->sec_lo; - sec |= p->sec_hi << 16; - - rxts->ns = p->ns_lo; - rxts->ns |= (p->ns_hi & 0x3fff) << 16; - rxts->ns += ((u64)sec) * 1000000000ULL; - rxts->seqid = p->seqid; - rxts->msgtype = (p->msgtype >> 12) & 0xf; - rxts->hash = p->msgtype & 0x0fff; - rxts->tmo = jiffies + 2; -} - -static u64 phy2txts(struct phy_txts *p) -{ - u64 ns; - u32 sec; - - sec = p->sec_lo; - sec |= p->sec_hi << 16; - - ns = p->ns_lo; - ns |= (p->ns_hi & 0x3fff) << 16; - ns += ((u64)sec) * 1000000000ULL; - - return ns; -} - -static void periodic_output(struct dp83640_clock *clock, - struct ptp_clock_request *clkreq, bool on) -{ - struct dp83640_private *dp83640 = clock->chosen; - struct phy_device *phydev = dp83640->phydev; - u32 sec, nsec, period; - u16 gpio, ptp_trig, trigger, val; - - gpio = on ? gpio_tab[PEROUT_GPIO] : 0; - trigger = PER_TRIGGER; - - ptp_trig = TRIG_WR | - (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT | - (gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT | - TRIG_PER | - TRIG_PULSE; - - val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT; - - if (!on) { - val |= TRIG_DIS; - mutex_lock(&clock->extreg_lock); - ext_write(0, phydev, PAGE5, PTP_TRIG, ptp_trig); - ext_write(0, phydev, PAGE4, PTP_CTL, val); - mutex_unlock(&clock->extreg_lock); - return; - } - - sec = clkreq->perout.start.sec; - nsec = clkreq->perout.start.nsec; - period = clkreq->perout.period.sec * 1000000000UL; - period += clkreq->perout.period.nsec; - - mutex_lock(&clock->extreg_lock); - - ext_write(0, phydev, PAGE5, PTP_TRIG, ptp_trig); - - /*load trigger*/ - val |= TRIG_LOAD; - ext_write(0, phydev, PAGE4, PTP_CTL, val); - ext_write(0, phydev, PAGE4, PTP_TDR, nsec & 0xffff); /* ns[15:0] */ - ext_write(0, phydev, PAGE4, PTP_TDR, nsec >> 16); /* ns[31:16] */ - ext_write(0, phydev, PAGE4, PTP_TDR, sec & 0xffff); /* sec[15:0] */ - ext_write(0, phydev, PAGE4, PTP_TDR, sec >> 16); /* sec[31:16] */ - ext_write(0, phydev, PAGE4, PTP_TDR, period & 0xffff); /* ns[15:0] */ - ext_write(0, phydev, PAGE4, PTP_TDR, period >> 16); /* ns[31:16] */ - - /*enable trigger*/ - val &= ~TRIG_LOAD; - val |= TRIG_EN; - ext_write(0, phydev, PAGE4, PTP_CTL, val); - - mutex_unlock(&clock->extreg_lock); -} - -/* ptp clock methods */ - -static int ptp_dp83640_adjfreq(struct ptp_clock_info *ptp, s32 ppb) -{ - struct dp83640_clock *clock = - container_of(ptp, struct dp83640_clock, caps); - struct phy_device *phydev = clock->chosen->phydev; - u64 rate; - int neg_adj = 0; - u16 hi, lo; - - if (ppb < 0) { - neg_adj = 1; - ppb = -ppb; - } - rate = ppb; - rate <<= 26; - rate = div_u64(rate, 1953125); - - hi = (rate >> 16) & PTP_RATE_HI_MASK; - if (neg_adj) - hi |= PTP_RATE_DIR; - - lo = rate & 0xffff; - - mutex_lock(&clock->extreg_lock); - - ext_write(1, phydev, PAGE4, PTP_RATEH, hi); - ext_write(1, phydev, PAGE4, PTP_RATEL, lo); - - mutex_unlock(&clock->extreg_lock); - - return 0; -} - -static int ptp_dp83640_adjtime(struct ptp_clock_info *ptp, s64 delta) -{ - struct dp83640_clock *clock = - container_of(ptp, struct dp83640_clock, caps); - struct phy_device *phydev = clock->chosen->phydev; - struct timespec ts; - int err; - - delta += ADJTIME_FIX; - - ts = ns_to_timespec(delta); - - mutex_lock(&clock->extreg_lock); - - err = tdr_write(1, phydev, &ts, PTP_STEP_CLK); - - mutex_unlock(&clock->extreg_lock); - - return err; -} - -static int ptp_dp83640_gettime(struct ptp_clock_info *ptp, struct timespec *ts) -{ - struct dp83640_clock *clock = - container_of(ptp, struct dp83640_clock, caps); - struct phy_device *phydev = clock->chosen->phydev; - unsigned int val[4]; - - mutex_lock(&clock->extreg_lock); - - ext_write(0, phydev, PAGE4, PTP_CTL, PTP_RD_CLK); - - val[0] = ext_read(phydev, PAGE4, PTP_TDR); /* ns[15:0] */ - val[1] = ext_read(phydev, PAGE4, PTP_TDR); /* ns[31:16] */ - val[2] = ext_read(phydev, PAGE4, PTP_TDR); /* sec[15:0] */ - val[3] = ext_read(phydev, PAGE4, PTP_TDR); /* sec[31:16] */ - - mutex_unlock(&clock->extreg_lock); - - ts->tv_nsec = val[0] | (val[1] << 16); - ts->tv_sec = val[2] | (val[3] << 16); - - return 0; -} - -static int ptp_dp83640_settime(struct ptp_clock_info *ptp, - const struct timespec *ts) -{ - struct dp83640_clock *clock = - container_of(ptp, struct dp83640_clock, caps); - struct phy_device *phydev = clock->chosen->phydev; - int err; - - mutex_lock(&clock->extreg_lock); - - err = tdr_write(1, phydev, ts, PTP_LOAD_CLK); - - mutex_unlock(&clock->extreg_lock); - - return err; -} - -static int ptp_dp83640_enable(struct ptp_clock_info *ptp, - struct ptp_clock_request *rq, int on) -{ - struct dp83640_clock *clock = - container_of(ptp, struct dp83640_clock, caps); - struct phy_device *phydev = clock->chosen->phydev; - int index; - u16 evnt, event_num, gpio_num; - - switch (rq->type) { - case PTP_CLK_REQ_EXTTS: - index = rq->extts.index; - if (index < 0 || index >= N_EXT_TS) - return -EINVAL; - event_num = EXT_EVENT + index; - evnt = EVNT_WR | (event_num & EVNT_SEL_MASK) << EVNT_SEL_SHIFT; - if (on) { - gpio_num = gpio_tab[EXTTS0_GPIO + index]; - evnt |= (gpio_num & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT; - evnt |= EVNT_RISE; - } - ext_write(0, phydev, PAGE5, PTP_EVNT, evnt); - return 0; - - case PTP_CLK_REQ_PEROUT: - if (rq->perout.index != 0) - return -EINVAL; - periodic_output(clock, rq, on); - return 0; - - default: - break; - } - - return -EOPNOTSUPP; -} - -static u8 status_frame_dst[6] = { 0x01, 0x1B, 0x19, 0x00, 0x00, 0x00 }; -static u8 status_frame_src[6] = { 0x08, 0x00, 0x17, 0x0B, 0x6B, 0x0F }; - -static void enable_status_frames(struct phy_device *phydev, bool on) -{ - u16 cfg0 = 0, ver; - - if (on) - cfg0 = PSF_EVNT_EN | PSF_RXTS_EN | PSF_TXTS_EN | ENDIAN_FLAG; - - ver = (PSF_PTPVER & VERSIONPTP_MASK) << VERSIONPTP_SHIFT; - - ext_write(0, phydev, PAGE5, PSF_CFG0, cfg0); - ext_write(0, phydev, PAGE6, PSF_CFG1, ver); - - if (!phydev->attached_dev) { - pr_warning("dp83640: expected to find an attached netdevice\n"); - return; - } - - if (on) { - if (dev_mc_add(phydev->attached_dev, status_frame_dst)) - pr_warning("dp83640: failed to add mc address\n"); - } else { - if (dev_mc_del(phydev->attached_dev, status_frame_dst)) - pr_warning("dp83640: failed to delete mc address\n"); - } -} - -static bool is_status_frame(struct sk_buff *skb, int type) -{ - struct ethhdr *h = eth_hdr(skb); - - if (PTP_CLASS_V2_L2 == type && - !memcmp(h->h_source, status_frame_src, sizeof(status_frame_src))) - return true; - else - return false; -} - -static int expired(struct rxts *rxts) -{ - return time_after(jiffies, rxts->tmo); -} - -/* Caller must hold rx_lock. */ -static void prune_rx_ts(struct dp83640_private *dp83640) -{ - struct list_head *this, *next; - struct rxts *rxts; - - list_for_each_safe(this, next, &dp83640->rxts) { - rxts = list_entry(this, struct rxts, list); - if (expired(rxts)) { - list_del_init(&rxts->list); - list_add(&rxts->list, &dp83640->rxpool); - } - } -} - -/* synchronize the phyters so they act as one clock */ - -static void enable_broadcast(struct phy_device *phydev, int init_page, int on) -{ - int val; - phy_write(phydev, PAGESEL, 0); - val = phy_read(phydev, PHYCR2); - if (on) - val |= BC_WRITE; - else - val &= ~BC_WRITE; - phy_write(phydev, PHYCR2, val); - phy_write(phydev, PAGESEL, init_page); -} - -static void recalibrate(struct dp83640_clock *clock) -{ - s64 now, diff; - struct phy_txts event_ts; - struct timespec ts; - struct list_head *this; - struct dp83640_private *tmp; - struct phy_device *master = clock->chosen->phydev; - u16 cal_gpio, cfg0, evnt, ptp_trig, trigger, val; - - trigger = CAL_TRIGGER; - cal_gpio = gpio_tab[CALIBRATE_GPIO]; - - mutex_lock(&clock->extreg_lock); - - /* - * enable broadcast, disable status frames, enable ptp clock - */ - list_for_each(this, &clock->phylist) { - tmp = list_entry(this, struct dp83640_private, list); - enable_broadcast(tmp->phydev, clock->page, 1); - tmp->cfg0 = ext_read(tmp->phydev, PAGE5, PSF_CFG0); - ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, 0); - ext_write(0, tmp->phydev, PAGE4, PTP_CTL, PTP_ENABLE); - } - enable_broadcast(master, clock->page, 1); - cfg0 = ext_read(master, PAGE5, PSF_CFG0); - ext_write(0, master, PAGE5, PSF_CFG0, 0); - ext_write(0, master, PAGE4, PTP_CTL, PTP_ENABLE); - - /* - * enable an event timestamp - */ - evnt = EVNT_WR | EVNT_RISE | EVNT_SINGLE; - evnt |= (CAL_EVENT & EVNT_SEL_MASK) << EVNT_SEL_SHIFT; - evnt |= (cal_gpio & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT; - - list_for_each(this, &clock->phylist) { - tmp = list_entry(this, struct dp83640_private, list); - ext_write(0, tmp->phydev, PAGE5, PTP_EVNT, evnt); - } - ext_write(0, master, PAGE5, PTP_EVNT, evnt); - - /* - * configure a trigger - */ - ptp_trig = TRIG_WR | TRIG_IF_LATE | TRIG_PULSE; - ptp_trig |= (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT; - ptp_trig |= (cal_gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT; - ext_write(0, master, PAGE5, PTP_TRIG, ptp_trig); - - /* load trigger */ - val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT; - val |= TRIG_LOAD; - ext_write(0, master, PAGE4, PTP_CTL, val); - - /* enable trigger */ - val &= ~TRIG_LOAD; - val |= TRIG_EN; - ext_write(0, master, PAGE4, PTP_CTL, val); - - /* disable trigger */ - val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT; - val |= TRIG_DIS; - ext_write(0, master, PAGE4, PTP_CTL, val); - - /* - * read out and correct offsets - */ - val = ext_read(master, PAGE4, PTP_STS); - pr_info("master PTP_STS 0x%04hx", val); - val = ext_read(master, PAGE4, PTP_ESTS); - pr_info("master PTP_ESTS 0x%04hx", val); - event_ts.ns_lo = ext_read(master, PAGE4, PTP_EDATA); - event_ts.ns_hi = ext_read(master, PAGE4, PTP_EDATA); - event_ts.sec_lo = ext_read(master, PAGE4, PTP_EDATA); - event_ts.sec_hi = ext_read(master, PAGE4, PTP_EDATA); - now = phy2txts(&event_ts); - - list_for_each(this, &clock->phylist) { - tmp = list_entry(this, struct dp83640_private, list); - val = ext_read(tmp->phydev, PAGE4, PTP_STS); - pr_info("slave PTP_STS 0x%04hx", val); - val = ext_read(tmp->phydev, PAGE4, PTP_ESTS); - pr_info("slave PTP_ESTS 0x%04hx", val); - event_ts.ns_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA); - event_ts.ns_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA); - event_ts.sec_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA); - event_ts.sec_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA); - diff = now - (s64) phy2txts(&event_ts); - pr_info("slave offset %lld nanoseconds\n", diff); - diff += ADJTIME_FIX; - ts = ns_to_timespec(diff); - tdr_write(0, tmp->phydev, &ts, PTP_STEP_CLK); - } - - /* - * restore status frames - */ - list_for_each(this, &clock->phylist) { - tmp = list_entry(this, struct dp83640_private, list); - ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, tmp->cfg0); - } - ext_write(0, master, PAGE5, PSF_CFG0, cfg0); - - mutex_unlock(&clock->extreg_lock); -} - -/* time stamping methods */ - -static inline u16 exts_chan_to_edata(int ch) -{ - return 1 << ((ch + EXT_EVENT) * 2); -} - -static int decode_evnt(struct dp83640_private *dp83640, - void *data, u16 ests) -{ - struct phy_txts *phy_txts; - struct ptp_clock_event event; - int i, parsed; - int words = (ests >> EVNT_TS_LEN_SHIFT) & EVNT_TS_LEN_MASK; - u16 ext_status = 0; - - if (ests & MULT_EVNT) { - ext_status = *(u16 *) data; - data += sizeof(ext_status); - } - - phy_txts = data; - - switch (words) { /* fall through in every case */ - case 3: - dp83640->edata.sec_hi = phy_txts->sec_hi; - case 2: - dp83640->edata.sec_lo = phy_txts->sec_lo; - case 1: - dp83640->edata.ns_hi = phy_txts->ns_hi; - case 0: - dp83640->edata.ns_lo = phy_txts->ns_lo; - } - - if (ext_status) { - parsed = words + 2; - } else { - parsed = words + 1; - i = ((ests >> EVNT_NUM_SHIFT) & EVNT_NUM_MASK) - EXT_EVENT; - ext_status = exts_chan_to_edata(i); - } - - event.type = PTP_CLOCK_EXTTS; - event.timestamp = phy2txts(&dp83640->edata); - - for (i = 0; i < N_EXT_TS; i++) { - if (ext_status & exts_chan_to_edata(i)) { - event.index = i; - ptp_clock_event(dp83640->clock->ptp_clock, &event); - } - } - - return parsed * sizeof(u16); -} - -static void decode_rxts(struct dp83640_private *dp83640, - struct phy_rxts *phy_rxts) -{ - struct rxts *rxts; - unsigned long flags; - - spin_lock_irqsave(&dp83640->rx_lock, flags); - - prune_rx_ts(dp83640); - - if (list_empty(&dp83640->rxpool)) { - pr_debug("dp83640: rx timestamp pool is empty\n"); - goto out; - } - rxts = list_first_entry(&dp83640->rxpool, struct rxts, list); - list_del_init(&rxts->list); - phy2rxts(phy_rxts, rxts); - list_add_tail(&rxts->list, &dp83640->rxts); -out: - spin_unlock_irqrestore(&dp83640->rx_lock, flags); -} - -static void decode_txts(struct dp83640_private *dp83640, - struct phy_txts *phy_txts) -{ - struct skb_shared_hwtstamps shhwtstamps; - struct sk_buff *skb; - u64 ns; - - /* We must already have the skb that triggered this. */ - - skb = skb_dequeue(&dp83640->tx_queue); - - if (!skb) { - pr_debug("dp83640: have timestamp but tx_queue empty\n"); - return; - } - ns = phy2txts(phy_txts); - memset(&shhwtstamps, 0, sizeof(shhwtstamps)); - shhwtstamps.hwtstamp = ns_to_ktime(ns); - skb_complete_tx_timestamp(skb, &shhwtstamps); -} - -static void decode_status_frame(struct dp83640_private *dp83640, - struct sk_buff *skb) -{ - struct phy_rxts *phy_rxts; - struct phy_txts *phy_txts; - u8 *ptr; - int len, size; - u16 ests, type; - - ptr = skb->data + 2; - - for (len = skb_headlen(skb) - 2; len > sizeof(type); len -= size) { - - type = *(u16 *)ptr; - ests = type & 0x0fff; - type = type & 0xf000; - len -= sizeof(type); - ptr += sizeof(type); - - if (PSF_RX == type && len >= sizeof(*phy_rxts)) { - - phy_rxts = (struct phy_rxts *) ptr; - decode_rxts(dp83640, phy_rxts); - size = sizeof(*phy_rxts); - - } else if (PSF_TX == type && len >= sizeof(*phy_txts)) { - - phy_txts = (struct phy_txts *) ptr; - decode_txts(dp83640, phy_txts); - size = sizeof(*phy_txts); - - } else if (PSF_EVNT == type && len >= sizeof(*phy_txts)) { - - size = decode_evnt(dp83640, ptr, ests); - - } else { - size = 0; - break; - } - ptr += size; - } -} - -static int is_sync(struct sk_buff *skb, int type) -{ - u8 *data = skb->data, *msgtype; - unsigned int offset = 0; - - switch (type) { - case PTP_CLASS_V1_IPV4: - case PTP_CLASS_V2_IPV4: - offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN; - break; - case PTP_CLASS_V1_IPV6: - case PTP_CLASS_V2_IPV6: - offset = OFF_PTP6; - break; - case PTP_CLASS_V2_L2: - offset = ETH_HLEN; - break; - case PTP_CLASS_V2_VLAN: - offset = ETH_HLEN + VLAN_HLEN; - break; - default: - return 0; - } - - if (type & PTP_CLASS_V1) - offset += OFF_PTP_CONTROL; - - if (skb->len < offset + 1) - return 0; - - msgtype = data + offset; - - return (*msgtype & 0xf) == 0; -} - -static int match(struct sk_buff *skb, unsigned int type, struct rxts *rxts) -{ - u16 *seqid; - unsigned int offset; - u8 *msgtype, *data = skb_mac_header(skb); - - /* check sequenceID, messageType, 12 bit hash of offset 20-29 */ - - switch (type) { - case PTP_CLASS_V1_IPV4: - case PTP_CLASS_V2_IPV4: - offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN; - break; - case PTP_CLASS_V1_IPV6: - case PTP_CLASS_V2_IPV6: - offset = OFF_PTP6; - break; - case PTP_CLASS_V2_L2: - offset = ETH_HLEN; - break; - case PTP_CLASS_V2_VLAN: - offset = ETH_HLEN + VLAN_HLEN; - break; - default: - return 0; - } - - if (skb->len + ETH_HLEN < offset + OFF_PTP_SEQUENCE_ID + sizeof(*seqid)) - return 0; - - if (unlikely(type & PTP_CLASS_V1)) - msgtype = data + offset + OFF_PTP_CONTROL; - else - msgtype = data + offset; - - seqid = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID); - - return (rxts->msgtype == (*msgtype & 0xf) && - rxts->seqid == ntohs(*seqid)); -} - -static void dp83640_free_clocks(void) -{ - struct dp83640_clock *clock; - struct list_head *this, *next; - - mutex_lock(&phyter_clocks_lock); - - list_for_each_safe(this, next, &phyter_clocks) { - clock = list_entry(this, struct dp83640_clock, list); - if (!list_empty(&clock->phylist)) { - pr_warning("phy list non-empty while unloading"); - BUG(); - } - list_del(&clock->list); - mutex_destroy(&clock->extreg_lock); - mutex_destroy(&clock->clock_lock); - put_device(&clock->bus->dev); - kfree(clock); - } - - mutex_unlock(&phyter_clocks_lock); -} - -static void dp83640_clock_init(struct dp83640_clock *clock, struct mii_bus *bus) -{ - INIT_LIST_HEAD(&clock->list); - clock->bus = bus; - mutex_init(&clock->extreg_lock); - mutex_init(&clock->clock_lock); - INIT_LIST_HEAD(&clock->phylist); - clock->caps.owner = THIS_MODULE; - sprintf(clock->caps.name, "dp83640 timer"); - clock->caps.max_adj = 1953124; - clock->caps.n_alarm = 0; - clock->caps.n_ext_ts = N_EXT_TS; - clock->caps.n_per_out = 1; - clock->caps.pps = 0; - clock->caps.adjfreq = ptp_dp83640_adjfreq; - clock->caps.adjtime = ptp_dp83640_adjtime; - clock->caps.gettime = ptp_dp83640_gettime; - clock->caps.settime = ptp_dp83640_settime; - clock->caps.enable = ptp_dp83640_enable; - /* - * Get a reference to this bus instance. - */ - get_device(&bus->dev); -} - -static int choose_this_phy(struct dp83640_clock *clock, - struct phy_device *phydev) -{ - if (chosen_phy == -1 && !clock->chosen) - return 1; - - if (chosen_phy == phydev->addr) - return 1; - - return 0; -} - -static struct dp83640_clock *dp83640_clock_get(struct dp83640_clock *clock) -{ - if (clock) - mutex_lock(&clock->clock_lock); - return clock; -} - -/* - * Look up and lock a clock by bus instance. - * If there is no clock for this bus, then create it first. - */ -static struct dp83640_clock *dp83640_clock_get_bus(struct mii_bus *bus) -{ - struct dp83640_clock *clock = NULL, *tmp; - struct list_head *this; - - mutex_lock(&phyter_clocks_lock); - - list_for_each(this, &phyter_clocks) { - tmp = list_entry(this, struct dp83640_clock, list); - if (tmp->bus == bus) { - clock = tmp; - break; - } - } - if (clock) - goto out; - - clock = kzalloc(sizeof(struct dp83640_clock), GFP_KERNEL); - if (!clock) - goto out; - - dp83640_clock_init(clock, bus); - list_add_tail(&phyter_clocks, &clock->list); -out: - mutex_unlock(&phyter_clocks_lock); - - return dp83640_clock_get(clock); -} - -static void dp83640_clock_put(struct dp83640_clock *clock) -{ - mutex_unlock(&clock->clock_lock); -} - -static int dp83640_probe(struct phy_device *phydev) -{ - struct dp83640_clock *clock; - struct dp83640_private *dp83640; - int err = -ENOMEM, i; - - if (phydev->addr == BROADCAST_ADDR) - return 0; - - clock = dp83640_clock_get_bus(phydev->bus); - if (!clock) - goto no_clock; - - dp83640 = kzalloc(sizeof(struct dp83640_private), GFP_KERNEL); - if (!dp83640) - goto no_memory; - - dp83640->phydev = phydev; - INIT_WORK(&dp83640->ts_work, rx_timestamp_work); - - INIT_LIST_HEAD(&dp83640->rxts); - INIT_LIST_HEAD(&dp83640->rxpool); - for (i = 0; i < MAX_RXTS; i++) - list_add(&dp83640->rx_pool_data[i].list, &dp83640->rxpool); - - phydev->priv = dp83640; - - spin_lock_init(&dp83640->rx_lock); - skb_queue_head_init(&dp83640->rx_queue); - skb_queue_head_init(&dp83640->tx_queue); - - dp83640->clock = clock; - - if (choose_this_phy(clock, phydev)) { - clock->chosen = dp83640; - clock->ptp_clock = ptp_clock_register(&clock->caps); - if (IS_ERR(clock->ptp_clock)) { - err = PTR_ERR(clock->ptp_clock); - goto no_register; - } - } else - list_add_tail(&dp83640->list, &clock->phylist); - - if (clock->chosen && !list_empty(&clock->phylist)) - recalibrate(clock); - else - enable_broadcast(dp83640->phydev, clock->page, 1); - - dp83640_clock_put(clock); - return 0; - -no_register: - clock->chosen = NULL; - kfree(dp83640); -no_memory: - dp83640_clock_put(clock); -no_clock: - return err; -} - -static void dp83640_remove(struct phy_device *phydev) -{ - struct dp83640_clock *clock; - struct list_head *this, *next; - struct dp83640_private *tmp, *dp83640 = phydev->priv; - struct sk_buff *skb; - - if (phydev->addr == BROADCAST_ADDR) - return; - - enable_status_frames(phydev, false); - cancel_work_sync(&dp83640->ts_work); - - while ((skb = skb_dequeue(&dp83640->rx_queue)) != NULL) - kfree_skb(skb); - - while ((skb = skb_dequeue(&dp83640->tx_queue)) != NULL) - skb_complete_tx_timestamp(skb, NULL); - - clock = dp83640_clock_get(dp83640->clock); - - if (dp83640 == clock->chosen) { - ptp_clock_unregister(clock->ptp_clock); - clock->chosen = NULL; - } else { - list_for_each_safe(this, next, &clock->phylist) { - tmp = list_entry(this, struct dp83640_private, list); - if (tmp == dp83640) { - list_del_init(&tmp->list); - break; - } - } - } - - dp83640_clock_put(clock); - kfree(dp83640); -} - -static int dp83640_hwtstamp(struct phy_device *phydev, struct ifreq *ifr) -{ - struct dp83640_private *dp83640 = phydev->priv; - struct hwtstamp_config cfg; - u16 txcfg0, rxcfg0; - - if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) - return -EFAULT; - - if (cfg.flags) /* reserved for future extensions */ - return -EINVAL; - - if (cfg.tx_type < 0 || cfg.tx_type > HWTSTAMP_TX_ONESTEP_SYNC) - return -ERANGE; - - dp83640->hwts_tx_en = cfg.tx_type; - - switch (cfg.rx_filter) { - case HWTSTAMP_FILTER_NONE: - dp83640->hwts_rx_en = 0; - dp83640->layer = 0; - dp83640->version = 0; - break; - case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: - case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: - case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: - dp83640->hwts_rx_en = 1; - dp83640->layer = LAYER4; - dp83640->version = 1; - break; - case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: - case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: - case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: - dp83640->hwts_rx_en = 1; - dp83640->layer = LAYER4; - dp83640->version = 2; - break; - case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: - case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: - case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: - dp83640->hwts_rx_en = 1; - dp83640->layer = LAYER2; - dp83640->version = 2; - break; - case HWTSTAMP_FILTER_PTP_V2_EVENT: - case HWTSTAMP_FILTER_PTP_V2_SYNC: - case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: - dp83640->hwts_rx_en = 1; - dp83640->layer = LAYER4|LAYER2; - dp83640->version = 2; - break; - default: - return -ERANGE; - } - - txcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT; - rxcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT; - - if (dp83640->layer & LAYER2) { - txcfg0 |= TX_L2_EN; - rxcfg0 |= RX_L2_EN; - } - if (dp83640->layer & LAYER4) { - txcfg0 |= TX_IPV6_EN | TX_IPV4_EN; - rxcfg0 |= RX_IPV6_EN | RX_IPV4_EN; - } - - if (dp83640->hwts_tx_en) - txcfg0 |= TX_TS_EN; - - if (dp83640->hwts_tx_en == HWTSTAMP_TX_ONESTEP_SYNC) - txcfg0 |= SYNC_1STEP | CHK_1STEP; - - if (dp83640->hwts_rx_en) - rxcfg0 |= RX_TS_EN; - - mutex_lock(&dp83640->clock->extreg_lock); - - if (dp83640->hwts_tx_en || dp83640->hwts_rx_en) { - enable_status_frames(phydev, true); - ext_write(0, phydev, PAGE4, PTP_CTL, PTP_ENABLE); - } - - ext_write(0, phydev, PAGE5, PTP_TXCFG0, txcfg0); - ext_write(0, phydev, PAGE5, PTP_RXCFG0, rxcfg0); - - mutex_unlock(&dp83640->clock->extreg_lock); - - return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; -} - -static void rx_timestamp_work(struct work_struct *work) -{ - struct dp83640_private *dp83640 = - container_of(work, struct dp83640_private, ts_work); - struct list_head *this, *next; - struct rxts *rxts; - struct skb_shared_hwtstamps *shhwtstamps; - struct sk_buff *skb; - unsigned int type; - unsigned long flags; - - /* Deliver each deferred packet, with or without a time stamp. */ - - while ((skb = skb_dequeue(&dp83640->rx_queue)) != NULL) { - type = SKB_PTP_TYPE(skb); - spin_lock_irqsave(&dp83640->rx_lock, flags); - list_for_each_safe(this, next, &dp83640->rxts) { - rxts = list_entry(this, struct rxts, list); - if (match(skb, type, rxts)) { - shhwtstamps = skb_hwtstamps(skb); - memset(shhwtstamps, 0, sizeof(*shhwtstamps)); - shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns); - list_del_init(&rxts->list); - list_add(&rxts->list, &dp83640->rxpool); - break; - } - } - spin_unlock_irqrestore(&dp83640->rx_lock, flags); - netif_rx_ni(skb); - } - - /* Clear out expired time stamps. */ - - spin_lock_irqsave(&dp83640->rx_lock, flags); - prune_rx_ts(dp83640); - spin_unlock_irqrestore(&dp83640->rx_lock, flags); -} - -static bool dp83640_rxtstamp(struct phy_device *phydev, - struct sk_buff *skb, int type) -{ - struct dp83640_private *dp83640 = phydev->priv; - - if (!dp83640->hwts_rx_en) - return false; - - if (is_status_frame(skb, type)) { - decode_status_frame(dp83640, skb); - kfree_skb(skb); - return true; - } - - SKB_PTP_TYPE(skb) = type; - skb_queue_tail(&dp83640->rx_queue, skb); - schedule_work(&dp83640->ts_work); - - return true; -} - -static void dp83640_txtstamp(struct phy_device *phydev, - struct sk_buff *skb, int type) -{ - struct dp83640_private *dp83640 = phydev->priv; - - switch (dp83640->hwts_tx_en) { - - case HWTSTAMP_TX_ONESTEP_SYNC: - if (is_sync(skb, type)) { - skb_complete_tx_timestamp(skb, NULL); - return; - } - /* fall through */ - case HWTSTAMP_TX_ON: - skb_queue_tail(&dp83640->tx_queue, skb); - schedule_work(&dp83640->ts_work); - break; - - case HWTSTAMP_TX_OFF: - default: - skb_complete_tx_timestamp(skb, NULL); - break; - } -} - -static struct phy_driver dp83640_driver = { - .phy_id = DP83640_PHY_ID, - .phy_id_mask = 0xfffffff0, - .name = "NatSemi DP83640", - .features = PHY_BASIC_FEATURES, - .flags = 0, - .probe = dp83640_probe, - .remove = dp83640_remove, - .config_aneg = genphy_config_aneg, - .read_status = genphy_read_status, - .hwtstamp = dp83640_hwtstamp, - .rxtstamp = dp83640_rxtstamp, - .txtstamp = dp83640_txtstamp, - .driver = {.owner = THIS_MODULE,} -}; - -static int __init dp83640_init(void) -{ - return phy_driver_register(&dp83640_driver); -} - -static void __exit dp83640_exit(void) -{ - dp83640_free_clocks(); - phy_driver_unregister(&dp83640_driver); -} - -MODULE_DESCRIPTION("National Semiconductor DP83640 PHY driver"); -MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.at>"); -MODULE_LICENSE("GPL"); - -module_init(dp83640_init); -module_exit(dp83640_exit); - -static struct mdio_device_id __maybe_unused dp83640_tbl[] = { - { DP83640_PHY_ID, 0xfffffff0 }, - { } -}; - -MODULE_DEVICE_TABLE(mdio, dp83640_tbl); |