Input: psmouse - attempt to re-synchronize mouse every 5 seconds
This should help driver to deal vith KVMs that reset mice when switching between boxes. Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov
parent
b65d0d1bac
commit
f0d5c6f419
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@ -348,6 +348,40 @@ static int alps_tap_mode(struct psmouse *psmouse, int enable)
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return 0;
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}
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/*
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* alps_poll() - poll the touchpad for current motion packet.
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* Used in resync.
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*/
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static int alps_poll(struct psmouse *psmouse)
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{
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struct alps_data *priv = psmouse->private;
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unsigned char buf[6];
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int poll_failed;
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if (priv->i->flags & ALPS_PASS)
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alps_passthrough_mode(psmouse, 1);
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poll_failed = ps2_command(&psmouse->ps2dev, buf,
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PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
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if (priv->i->flags & ALPS_PASS)
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alps_passthrough_mode(psmouse, 0);
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if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
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return -1;
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if ((psmouse->badbyte & 0xc8) == 0x08) {
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/*
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* Poll the track stick ...
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*/
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if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
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return -1;
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}
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memcpy(psmouse->packet, buf, sizeof(buf));
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return 0;
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}
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static int alps_reconnect(struct psmouse *psmouse)
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{
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struct alps_data *priv = psmouse->private;
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@ -451,10 +485,14 @@ int alps_init(struct psmouse *psmouse)
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input_register_device(priv->dev2);
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psmouse->protocol_handler = alps_process_byte;
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psmouse->poll = alps_poll;
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psmouse->disconnect = alps_disconnect;
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psmouse->reconnect = alps_reconnect;
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psmouse->pktsize = 6;
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/* We are having trouble resyncing ALPS touchpads so disable it for now */
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psmouse->resync_time = 0;
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return 0;
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init_fail:
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@ -117,7 +117,7 @@ static int ps2pp_cmd(struct psmouse *psmouse, unsigned char *param, unsigned cha
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if (psmouse_sliced_command(psmouse, command))
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return -1;
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if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_POLL))
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if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_POLL | 0x0300))
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return -1;
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return 0;
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@ -54,10 +54,14 @@ static unsigned int psmouse_smartscroll = 1;
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module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
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MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
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static unsigned int psmouse_resetafter;
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static unsigned int psmouse_resetafter = 5;
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module_param_named(resetafter, psmouse_resetafter, uint, 0644);
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MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
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static unsigned int psmouse_resync_time = 5;
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module_param_named(resync_time, psmouse_resync_time, uint, 0644);
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MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
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PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
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NULL,
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psmouse_attr_show_protocol, psmouse_attr_set_protocol);
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@ -70,12 +74,16 @@ PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
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PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
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(void *) offsetof(struct psmouse, resetafter),
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psmouse_show_int_attr, psmouse_set_int_attr);
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PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
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(void *) offsetof(struct psmouse, resync_time),
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psmouse_show_int_attr, psmouse_set_int_attr);
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static struct attribute *psmouse_attributes[] = {
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&psmouse_attr_protocol.dattr.attr,
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&psmouse_attr_rate.dattr.attr,
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&psmouse_attr_resolution.dattr.attr,
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&psmouse_attr_resetafter.dattr.attr,
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&psmouse_attr_resync_time.dattr.attr,
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NULL
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};
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@ -98,6 +106,8 @@ __obsolete_setup("psmouse_rate=");
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*/
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static DECLARE_MUTEX(psmouse_sem);
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static struct workqueue_struct *kpsmoused_wq;
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struct psmouse_protocol {
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enum psmouse_type type;
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char *name;
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@ -178,15 +188,79 @@ static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_reg
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}
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/*
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* psmouse_interrupt() handles incoming characters, either gathering them into
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* packets or passing them to the command routine as command output.
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* __psmouse_set_state() sets new psmouse state and resets all flags.
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*/
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static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
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{
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psmouse->state = new_state;
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psmouse->pktcnt = psmouse->out_of_sync = 0;
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psmouse->ps2dev.flags = 0;
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psmouse->last = jiffies;
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}
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/*
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* psmouse_set_state() sets new psmouse state and resets all flags and
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* counters while holding serio lock so fighting with interrupt handler
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* is not a concern.
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*/
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static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
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{
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serio_pause_rx(psmouse->ps2dev.serio);
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__psmouse_set_state(psmouse, new_state);
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serio_continue_rx(psmouse->ps2dev.serio);
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}
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/*
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* psmouse_handle_byte() processes one byte of the input data stream
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* by calling corresponding protocol handler.
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*/
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static int psmouse_handle_byte(struct psmouse *psmouse, struct pt_regs *regs)
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{
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psmouse_ret_t rc = psmouse->protocol_handler(psmouse, regs);
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switch (rc) {
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case PSMOUSE_BAD_DATA:
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if (psmouse->state == PSMOUSE_ACTIVATED) {
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printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
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psmouse->name, psmouse->phys, psmouse->pktcnt);
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if (++psmouse->out_of_sync == psmouse->resetafter) {
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__psmouse_set_state(psmouse, PSMOUSE_IGNORE);
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printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
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serio_reconnect(psmouse->ps2dev.serio);
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return -1;
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}
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}
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psmouse->pktcnt = 0;
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break;
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case PSMOUSE_FULL_PACKET:
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psmouse->pktcnt = 0;
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if (psmouse->out_of_sync) {
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psmouse->out_of_sync = 0;
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printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
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psmouse->name, psmouse->phys);
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}
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break;
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case PSMOUSE_GOOD_DATA:
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break;
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}
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return 0;
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}
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/*
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* psmouse_interrupt() handles incoming characters, either passing them
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* for normal processing or gathering them as command response.
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*/
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static irqreturn_t psmouse_interrupt(struct serio *serio,
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unsigned char data, unsigned int flags, struct pt_regs *regs)
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{
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struct psmouse *psmouse = serio_get_drvdata(serio);
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psmouse_ret_t rc;
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if (psmouse->state == PSMOUSE_IGNORE)
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goto out;
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@ -208,67 +282,58 @@ static irqreturn_t psmouse_interrupt(struct serio *serio,
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if (ps2_handle_response(&psmouse->ps2dev, data))
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goto out;
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if (psmouse->state == PSMOUSE_INITIALIZING)
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if (psmouse->state <= PSMOUSE_RESYNCING)
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goto out;
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if (psmouse->state == PSMOUSE_ACTIVATED &&
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psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
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printk(KERN_WARNING "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
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printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
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psmouse->name, psmouse->phys, psmouse->pktcnt);
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psmouse->pktcnt = 0;
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psmouse->badbyte = psmouse->packet[0];
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__psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
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queue_work(kpsmoused_wq, &psmouse->resync_work);
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goto out;
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}
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psmouse->last = jiffies;
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psmouse->packet[psmouse->pktcnt++] = data;
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if (psmouse->packet[0] == PSMOUSE_RET_BAT) {
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/*
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* Check if this is a new device announcement (0xAA 0x00)
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*/
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if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
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if (psmouse->pktcnt == 1)
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goto out;
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if (psmouse->pktcnt == 2) {
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if (psmouse->packet[1] == PSMOUSE_RET_ID) {
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psmouse->state = PSMOUSE_IGNORE;
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serio_reconnect(serio);
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goto out;
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}
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if (psmouse->type == PSMOUSE_SYNAPTICS) {
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/* neither 0xAA nor 0x00 are valid first bytes
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* for a packet in absolute mode
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*/
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psmouse->pktcnt = 0;
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goto out;
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}
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if (psmouse->packet[1] == PSMOUSE_RET_ID) {
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__psmouse_set_state(psmouse, PSMOUSE_IGNORE);
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serio_reconnect(serio);
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goto out;
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}
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/*
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* Not a new device, try processing first byte normally
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*/
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psmouse->pktcnt = 1;
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if (psmouse_handle_byte(psmouse, regs))
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goto out;
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psmouse->packet[psmouse->pktcnt++] = data;
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}
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rc = psmouse->protocol_handler(psmouse, regs);
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switch (rc) {
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case PSMOUSE_BAD_DATA:
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printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
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psmouse->name, psmouse->phys, psmouse->pktcnt);
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psmouse->pktcnt = 0;
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if (++psmouse->out_of_sync == psmouse->resetafter) {
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psmouse->state = PSMOUSE_IGNORE;
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printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
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serio_reconnect(psmouse->ps2dev.serio);
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}
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break;
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case PSMOUSE_FULL_PACKET:
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psmouse->pktcnt = 0;
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if (psmouse->out_of_sync) {
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psmouse->out_of_sync = 0;
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printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
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psmouse->name, psmouse->phys);
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}
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break;
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case PSMOUSE_GOOD_DATA:
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break;
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/*
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* See if we need to force resync because mouse was idle for too long
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*/
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if (psmouse->state == PSMOUSE_ACTIVATED &&
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psmouse->pktcnt == 1 && psmouse->resync_time &&
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time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
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psmouse->badbyte = psmouse->packet[0];
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__psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
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queue_work(kpsmoused_wq, &psmouse->resync_work);
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goto out;
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}
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out:
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psmouse->last = jiffies;
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psmouse_handle_byte(psmouse, regs);
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out:
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return IRQ_HANDLED;
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}
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@ -751,21 +816,6 @@ static void psmouse_initialize(struct psmouse *psmouse)
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}
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}
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/*
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* psmouse_set_state() sets new psmouse state and resets all flags and
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* counters while holding serio lock so fighting with interrupt handler
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* is not a concern.
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*/
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static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
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{
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serio_pause_rx(psmouse->ps2dev.serio);
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psmouse->state = new_state;
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psmouse->pktcnt = psmouse->out_of_sync = 0;
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psmouse->ps2dev.flags = 0;
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serio_continue_rx(psmouse->ps2dev.serio);
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}
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/*
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* psmouse_activate() enables the mouse so that we get motion reports from it.
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*/
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@ -794,6 +844,111 @@ static void psmouse_deactivate(struct psmouse *psmouse)
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psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
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}
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/*
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* psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
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*/
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static int psmouse_poll(struct psmouse *psmouse)
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{
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return ps2_command(&psmouse->ps2dev, psmouse->packet,
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PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
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}
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/*
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* psmouse_resync() attempts to re-validate current protocol.
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*/
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static void psmouse_resync(void *p)
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{
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struct psmouse *psmouse = p, *parent = NULL;
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struct serio *serio = psmouse->ps2dev.serio;
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psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
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int failed = 0, enabled = 0;
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int i;
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down(&psmouse_sem);
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if (psmouse->state != PSMOUSE_RESYNCING)
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goto out;
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if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
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parent = serio_get_drvdata(serio->parent);
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psmouse_deactivate(parent);
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}
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/*
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* Some mice don't ACK commands sent while they are in the middle of
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* transmitting motion packet. To avoid delay we use ps2_sendbyte()
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* instead of ps2_command() which would wait for 200ms for an ACK
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* that may never come.
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* As an additional quirk ALPS touchpads may not only forget to ACK
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* disable command but will stop reporting taps, so if we see that
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* mouse at least once ACKs disable we will do full reconnect if ACK
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* is missing.
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*/
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psmouse->num_resyncs++;
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if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
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if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
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failed = 1;
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} else
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psmouse->acks_disable_command = 1;
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/*
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* Poll the mouse. If it was reset the packet will be shorter than
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* psmouse->pktsize and ps2_command will fail. We do not expect and
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* do not handle scenario when mouse "upgrades" its protocol while
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* disconnected since it would require additional delay. If we ever
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* see a mouse that does it we'll adjust the code.
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*/
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if (!failed) {
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if (psmouse->poll(psmouse))
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failed = 1;
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else {
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psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
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for (i = 0; i < psmouse->pktsize; i++) {
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psmouse->pktcnt++;
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rc = psmouse->protocol_handler(psmouse, NULL);
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if (rc != PSMOUSE_GOOD_DATA)
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break;
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}
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if (rc != PSMOUSE_FULL_PACKET)
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failed = 1;
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psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
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}
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}
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/*
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* Now try to enable mouse. We try to do that even if poll failed and also
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* repeat our attempts 5 times, otherwise we may be left out with disabled
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* mouse.
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*/
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for (i = 0; i < 5; i++) {
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if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
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enabled = 1;
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break;
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}
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msleep(200);
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}
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if (!enabled) {
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printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
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psmouse->ps2dev.serio->phys);
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failed = 1;
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}
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if (failed) {
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psmouse_set_state(psmouse, PSMOUSE_IGNORE);
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printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
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serio_reconnect(serio);
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} else
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psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
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if (parent)
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psmouse_activate(parent);
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out:
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up(&psmouse_sem);
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}
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/*
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* psmouse_cleanup() resets the mouse into power-on state.
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@ -822,6 +977,11 @@ static void psmouse_disconnect(struct serio *serio)
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psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
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/* make sure we don't have a resync in progress */
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up(&psmouse_sem);
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flush_workqueue(kpsmoused_wq);
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down(&psmouse_sem);
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if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
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parent = serio_get_drvdata(serio->parent);
|
||||
psmouse_deactivate(parent);
|
||||
|
|
@ -859,6 +1019,7 @@ static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_proto
|
|||
|
||||
psmouse->set_rate = psmouse_set_rate;
|
||||
psmouse->set_resolution = psmouse_set_resolution;
|
||||
psmouse->poll = psmouse_poll;
|
||||
psmouse->protocol_handler = psmouse_process_byte;
|
||||
psmouse->pktsize = 3;
|
||||
|
||||
|
|
@ -874,6 +1035,23 @@ static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_proto
|
|||
else
|
||||
psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
|
||||
|
||||
/*
|
||||
* If mouse's packet size is 3 there is no point in polling the
|
||||
* device in hopes to detect protocol reset - we won't get less
|
||||
* than 3 bytes response anyhow.
|
||||
*/
|
||||
if (psmouse->pktsize == 3)
|
||||
psmouse->resync_time = 0;
|
||||
|
||||
/*
|
||||
* Some smart KVMs fake response to POLL command returning just
|
||||
* 3 bytes and messing up our resync logic, so if initial poll
|
||||
* fails we won't try polling the device anymore. Hopefully
|
||||
* such KVM will maintain initially selected protocol.
|
||||
*/
|
||||
if (psmouse->resync_time && psmouse->poll(psmouse))
|
||||
psmouse->resync_time = 0;
|
||||
|
||||
sprintf(psmouse->devname, "%s %s %s",
|
||||
psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
|
||||
|
||||
|
|
@ -914,6 +1092,7 @@ static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
|
|||
goto out;
|
||||
|
||||
ps2_init(&psmouse->ps2dev, serio);
|
||||
INIT_WORK(&psmouse->resync_work, psmouse_resync, psmouse);
|
||||
psmouse->dev = input_dev;
|
||||
sprintf(psmouse->phys, "%s/input0", serio->phys);
|
||||
|
||||
|
|
@ -934,6 +1113,7 @@ static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
|
|||
psmouse->rate = psmouse_rate;
|
||||
psmouse->resolution = psmouse_resolution;
|
||||
psmouse->resetafter = psmouse_resetafter;
|
||||
psmouse->resync_time = parent ? 0 : psmouse_resync_time;
|
||||
psmouse->smartscroll = psmouse_smartscroll;
|
||||
|
||||
psmouse_switch_protocol(psmouse, NULL);
|
||||
|
|
@ -1278,13 +1458,21 @@ static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
|
|||
|
||||
static int __init psmouse_init(void)
|
||||
{
|
||||
kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
|
||||
if (!kpsmoused_wq) {
|
||||
printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
serio_register_driver(&psmouse_drv);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit psmouse_exit(void)
|
||||
{
|
||||
serio_unregister_driver(&psmouse_drv);
|
||||
destroy_workqueue(kpsmoused_wq);
|
||||
}
|
||||
|
||||
module_init(psmouse_init);
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
#define PSMOUSE_CMD_GETINFO 0x03e9
|
||||
#define PSMOUSE_CMD_SETSTREAM 0x00ea
|
||||
#define PSMOUSE_CMD_SETPOLL 0x00f0
|
||||
#define PSMOUSE_CMD_POLL 0x03eb
|
||||
#define PSMOUSE_CMD_POLL 0x00eb /* caller sets number of bytes to receive */
|
||||
#define PSMOUSE_CMD_GETID 0x02f2
|
||||
#define PSMOUSE_CMD_SETRATE 0x10f3
|
||||
#define PSMOUSE_CMD_ENABLE 0x00f4
|
||||
|
|
@ -23,6 +23,7 @@
|
|||
enum psmouse_state {
|
||||
PSMOUSE_IGNORE,
|
||||
PSMOUSE_INITIALIZING,
|
||||
PSMOUSE_RESYNCING,
|
||||
PSMOUSE_CMD_MODE,
|
||||
PSMOUSE_ACTIVATED,
|
||||
};
|
||||
|
|
@ -38,15 +39,19 @@ struct psmouse {
|
|||
void *private;
|
||||
struct input_dev *dev;
|
||||
struct ps2dev ps2dev;
|
||||
struct work_struct resync_work;
|
||||
char *vendor;
|
||||
char *name;
|
||||
unsigned char packet[8];
|
||||
unsigned char badbyte;
|
||||
unsigned char pktcnt;
|
||||
unsigned char pktsize;
|
||||
unsigned char type;
|
||||
unsigned char acks_disable_command;
|
||||
unsigned int model;
|
||||
unsigned long last;
|
||||
unsigned long out_of_sync;
|
||||
unsigned long num_resyncs;
|
||||
enum psmouse_state state;
|
||||
char devname[64];
|
||||
char phys[32];
|
||||
|
|
@ -54,6 +59,7 @@ struct psmouse {
|
|||
unsigned int rate;
|
||||
unsigned int resolution;
|
||||
unsigned int resetafter;
|
||||
unsigned int resync_time;
|
||||
unsigned int smartscroll; /* Logitech only */
|
||||
|
||||
psmouse_ret_t (*protocol_handler)(struct psmouse *psmouse, struct pt_regs *regs);
|
||||
|
|
@ -62,6 +68,7 @@ struct psmouse {
|
|||
|
||||
int (*reconnect)(struct psmouse *psmouse);
|
||||
void (*disconnect)(struct psmouse *psmouse);
|
||||
int (*poll)(struct psmouse *psmouse);
|
||||
|
||||
void (*pt_activate)(struct psmouse *psmouse);
|
||||
void (*pt_deactivate)(struct psmouse *psmouse);
|
||||
|
|
|
|||
|
|
@ -652,6 +652,8 @@ int synaptics_init(struct psmouse *psmouse)
|
|||
psmouse->disconnect = synaptics_disconnect;
|
||||
psmouse->reconnect = synaptics_reconnect;
|
||||
psmouse->pktsize = 6;
|
||||
/* Synaptics can usually stay in sync without extra help */
|
||||
psmouse->resync_time = 0;
|
||||
|
||||
if (SYN_CAP_PASS_THROUGH(priv->capabilities))
|
||||
synaptics_pt_create(psmouse);
|
||||
|
|
|
|||
Loading…
Reference in New Issue