diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/keyboard/atkbd.c | 99 |
1 files changed, 68 insertions, 31 deletions
diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c index 820c7fd9a60..a0256f8de8e 100644 --- a/drivers/input/keyboard/atkbd.c +++ b/drivers/input/keyboard/atkbd.c @@ -166,6 +166,9 @@ static unsigned char atkbd_unxlate_table[128] = { #define ATKBD_SPECIAL 248 +#define ATKBD_LED_EVENT_BIT 0 +#define ATKBD_REP_EVENT_BIT 1 + static struct { unsigned char keycode; unsigned char set2; @@ -211,6 +214,10 @@ struct atkbd { unsigned char err_xl; unsigned int last; unsigned long time; + + struct work_struct event_work; + struct semaphore event_sem; + unsigned long event_mask; }; static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf, @@ -424,58 +431,86 @@ out: } /* - * Event callback from the input module. Events that change the state of - * the hardware are processed here. + * atkbd_event_work() is used to complete processing of events that + * can not be processed by input_event() which is often called from + * interrupt context. */ -static int atkbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) +static void atkbd_event_work(void *data) { - struct atkbd *atkbd = dev->private; const short period[32] = { 33, 37, 42, 46, 50, 54, 58, 63, 67, 75, 83, 92, 100, 109, 116, 125, 133, 149, 167, 182, 200, 217, 232, 250, 270, 303, 333, 370, 400, 435, 470, 500 }; const short delay[4] = { 250, 500, 750, 1000 }; + + struct atkbd *atkbd = data; + struct input_dev *dev = atkbd->dev; unsigned char param[2]; int i, j; + down(&atkbd->event_sem); + + if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask)) { + param[0] = (test_bit(LED_SCROLLL, dev->led) ? 1 : 0) + | (test_bit(LED_NUML, dev->led) ? 2 : 0) + | (test_bit(LED_CAPSL, dev->led) ? 4 : 0); + ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_SETLEDS); + + if (atkbd->extra) { + param[0] = 0; + param[1] = (test_bit(LED_COMPOSE, dev->led) ? 0x01 : 0) + | (test_bit(LED_SLEEP, dev->led) ? 0x02 : 0) + | (test_bit(LED_SUSPEND, dev->led) ? 0x04 : 0) + | (test_bit(LED_MISC, dev->led) ? 0x10 : 0) + | (test_bit(LED_MUTE, dev->led) ? 0x20 : 0); + ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_EX_SETLEDS); + } + } + + if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask)) { + i = j = 0; + while (i < 31 && period[i] < dev->rep[REP_PERIOD]) + i++; + while (j < 3 && delay[j] < dev->rep[REP_DELAY]) + j++; + dev->rep[REP_PERIOD] = period[i]; + dev->rep[REP_DELAY] = delay[j]; + param[0] = i | (j << 5); + ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_SETREP); + } + + up(&atkbd->event_sem); +} + +/* + * Event callback from the input module. Events that change the state of + * the hardware are processed here. If action can not be performed in + * interrupt context it is offloaded to atkbd_event_work. + */ + +static int atkbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) +{ + struct atkbd *atkbd = dev->private; + if (!atkbd->write) return -1; switch (type) { case EV_LED: - - param[0] = (test_bit(LED_SCROLLL, dev->led) ? 1 : 0) - | (test_bit(LED_NUML, dev->led) ? 2 : 0) - | (test_bit(LED_CAPSL, dev->led) ? 4 : 0); - ps2_schedule_command(&atkbd->ps2dev, param, ATKBD_CMD_SETLEDS); - - if (atkbd->extra) { - param[0] = 0; - param[1] = (test_bit(LED_COMPOSE, dev->led) ? 0x01 : 0) - | (test_bit(LED_SLEEP, dev->led) ? 0x02 : 0) - | (test_bit(LED_SUSPEND, dev->led) ? 0x04 : 0) - | (test_bit(LED_MISC, dev->led) ? 0x10 : 0) - | (test_bit(LED_MUTE, dev->led) ? 0x20 : 0); - ps2_schedule_command(&atkbd->ps2dev, param, ATKBD_CMD_EX_SETLEDS); - } - + set_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask); + wmb(); + schedule_work(&atkbd->event_work); return 0; case EV_REP: - if (atkbd->softrepeat) return 0; - - i = j = 0; - while (i < 31 && period[i] < dev->rep[REP_PERIOD]) - i++; - while (j < 3 && delay[j] < dev->rep[REP_DELAY]) - j++; - dev->rep[REP_PERIOD] = period[i]; - dev->rep[REP_DELAY] = delay[j]; - param[0] = i | (j << 5); - ps2_schedule_command(&atkbd->ps2dev, param, ATKBD_CMD_SETREP); + if (!atkbd->softrepeat) { + set_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask); + wmb(); + schedule_work(&atkbd->event_work); + } return 0; } @@ -810,6 +845,8 @@ static int atkbd_connect(struct serio *serio, struct serio_driver *drv) atkbd->dev = dev; ps2_init(&atkbd->ps2dev, serio); + INIT_WORK(&atkbd->event_work, atkbd_event_work, atkbd); + init_MUTEX(&atkbd->event_sem); switch (serio->id.type) { |