2 * GE PIO2 Counter Driver
4 * Author: Martyn Welch <martyn.welch@ge.com>
5 * Copyright 2009 GE Intelligent Platforms Embedded Systems, Inc.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
12 * The PIO-2 has 6 counters, currently this code just disables the interrupts
13 * and leaves them alone.
17 #include <linux/device.h>
18 #include <linux/types.h>
19 #include <linux/gpio.h>
20 #include <linux/vme.h>
24 static int pio2_cntr_irq_set(struct pio2_card *card, int id)
29 data = PIO2_CNTR_SC_DEV[id] | PIO2_CNTR_RW_BOTH | card->cntr[id].mode;
30 retval = vme_master_write(card->window, &data, 1, PIO2_CNTR_CTRL[id]);
34 data = card->cntr[id].count & 0xFF;
35 retval = vme_master_write(card->window, &data, 1, PIO2_CNTR_DATA[id]);
39 data = (card->cntr[id].count >> 8) & 0xFF;
40 retval = vme_master_write(card->window, &data, 1, PIO2_CNTR_DATA[id]);
47 int pio2_cntr_reset(struct pio2_card *card)
52 /* Clear down all timers */
53 for (i = 0; i < 6; i++) {
54 card->cntr[i].mode = PIO2_CNTR_MODE5;
55 card->cntr[i].count = 0;
56 retval = pio2_cntr_irq_set(card, i);
61 /* Ensure all counter interrupts are cleared */
63 retval = vme_master_read(card->window, ®, 1,
64 PIO2_REGS_INT_STAT_CNTR);