diff options
Diffstat (limited to 'drivers/gator/driver/gator_events_mmaped.c')
| -rw-r--r-- | drivers/gator/driver/gator_events_mmaped.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/drivers/gator/driver/gator_events_mmaped.c b/drivers/gator/driver/gator_events_mmaped.c deleted file mode 100644 index acd5f85ebb7..00000000000 --- a/drivers/gator/driver/gator_events_mmaped.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * Example events provider - * - * Copyright (C) ARM Limited 2010-2012. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Similar entries to those below must be present in the events.xml file. - * To add them to the events.xml, create an events-mmap.xml with the - * following contents and rebuild gatord: - * - * <counter_set name="mmaped_cntX"> - * <counter name="mmaped_cnt0"/> - * <counter name="mmaped_cnt1"/> - * </counter_set> - * <category name="mmaped" counter_set="mmaped_cntX" per_cpu="no"> - * <event event="0x0" title="Simulated" name="Sine" description="Sort-of-sine"/> - * <event event="0x1" title="Simulated" name="Triangle" description="Triangular wave"/> - * <event event="0x2" title="Simulated" name="PWM" description="PWM Signal"/> - * </category> - */ - -#include <linux/init.h> -#include <linux/io.h> -#include <linux/ratelimit.h> - -#include "gator.h" - -#define MMAPED_COUNTERS_NUM 3 - -static struct { - unsigned long enabled; - unsigned long event; - unsigned long key; -} mmaped_counters[MMAPED_COUNTERS_NUM]; - -static int mmaped_buffer[MMAPED_COUNTERS_NUM * 2]; - -#ifdef TODO -static void __iomem *mmaped_base; -#endif - -/* Adds mmaped_cntX directories and enabled, event, and key files to /dev/gator/driver/events */ -static int gator_events_mmaped_create_files(struct super_block *sb, - struct dentry *root) -{ - int i; - - for (i = 0; i < MMAPED_COUNTERS_NUM; i++) { - char buf[16]; - struct dentry *dir; - - snprintf(buf, sizeof(buf), "mmaped_cnt%d", i); - dir = gatorfs_mkdir(sb, root, buf); - if (WARN_ON(!dir)) - return -1; - gatorfs_create_ulong(sb, dir, "enabled", - &mmaped_counters[i].enabled); - gatorfs_create_ulong(sb, dir, "event", - &mmaped_counters[i].event); - gatorfs_create_ro_ulong(sb, dir, "key", - &mmaped_counters[i].key); - } - - return 0; -} - -static int gator_events_mmaped_start(void) -{ -#ifdef TODO - for (i = 0; i < MMAPED_COUNTERS_NUM; i++) - writel(mmaped_counters[i].event, - mmaped_base + COUNTERS_CONFIG_OFFSET[i]); - - writel(ENABLED, COUNTERS_CONTROL_OFFSET); -#endif - - return 0; -} - -static void gator_events_mmaped_stop(void) -{ -#ifdef TODO - writel(DISABLED, COUNTERS_CONTROL_OFFSET); -#endif -} - -#ifndef TODO -/* This function "simulates" counters, generating values of fancy - * functions like sine or triangle... */ -static int mmaped_simulate(int counter) -{ - int result = 0; - - switch (counter) { - case 0: /* sort-of-sine */ - { - static int t; - int x; - - if (t % 1024 < 512) - x = 512 - (t % 512); - else - x = t % 512; - - result = 32 * x / 512; - result = result * result; - - if (t < 1024) - result = 1922 - result; - - t = (t + 1) % 2048; - } - break; - case 1: /* triangle */ - { - static int v, d = 1; - - v += d; - if (v % 2000 == 0) - d = -d; - - result = v; - } - break; - case 2: /* PWM signal */ - { - static int t, dc; - - t = (t + 1) % 2000; - if (t % 100) - dc = (dc + 200) % 2000; - - result = t < dc ? 0 : 2000; - } - break; - } - - return result; -} -#endif - -static int gator_events_mmaped_read(int **buffer) -{ - int i; - int len = 0; - - /* System wide counters - read from one core only */ - if (smp_processor_id()) - return 0; - - for (i = 0; i < MMAPED_COUNTERS_NUM; i++) { - if (mmaped_counters[i].enabled) { - mmaped_buffer[len++] = mmaped_counters[i].key; -#ifdef TODO - mmaped_buffer[len++] = readl(mmaped_base + - COUNTERS_VALUE_OFFSET[i]); -#else - mmaped_buffer[len++] = mmaped_simulate( - mmaped_counters[i].event); -#endif - } - } - - if (buffer) - *buffer = mmaped_buffer; - - return len; -} - -static struct gator_interface gator_events_mmaped_interface = { - .create_files = gator_events_mmaped_create_files, - .start = gator_events_mmaped_start, - .stop = gator_events_mmaped_stop, - .read = gator_events_mmaped_read, -}; - -/* Must not be static! */ -int __init gator_events_mmaped_init(void) -{ - int i; - -#ifdef TODO - mmaped_base = ioremap(COUNTERS_PHYS_ADDR, SZ_4K); - if (!mmaped_base) - return -ENOMEM; -#endif - - for (i = 0; i < MMAPED_COUNTERS_NUM; i++) { - mmaped_counters[i].enabled = 0; - mmaped_counters[i].key = gator_events_get_key(); - } - - return gator_events_install(&gator_events_mmaped_interface); -} -gator_events_init(gator_events_mmaped_init); |