diff options
Diffstat (limited to 'drivers/staging/ozwpan/ozevent.c')
| -rw-r--r-- | drivers/staging/ozwpan/ozevent.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/drivers/staging/ozwpan/ozevent.c b/drivers/staging/ozwpan/ozevent.c deleted file mode 100644 index 77e86753610d..000000000000 --- a/drivers/staging/ozwpan/ozevent.c +++ /dev/null @@ -1,195 +0,0 @@ -/* ----------------------------------------------------------------------------- - * Copyright (c) 2011 Ozmo Inc - * Released under the GNU General Public License Version 2 (GPLv2). - * ----------------------------------------------------------------------------- - */ -#include "ozconfig.h" -#ifdef WANT_EVENT_TRACE -#include <linux/module.h> -#include <linux/debugfs.h> -#include <linux/jiffies.h> -#include <linux/uaccess.h> -#include "oztrace.h" -#include "ozevent.h" -#include "ozappif.h" -/*------------------------------------------------------------------------------ - * Although the event mask is logically part of the oz_evtdev structure, it is - * needed outside of this file so define it separately to avoid the need to - * export definition of struct oz_evtdev. - */ -u32 g_evt_mask; -/*------------------------------------------------------------------------------ - */ -#define OZ_MAX_EVTS 2048 /* Must be power of 2 */ -struct oz_evtdev { - struct dentry *root_dir; - int evt_in; - int evt_out; - int missed_events; - int present; - atomic_t users; - spinlock_t lock; - struct oz_event evts[OZ_MAX_EVTS]; -}; - -static struct oz_evtdev g_evtdev; - -/*------------------------------------------------------------------------------ - * Context: process - */ -void oz_event_init(void) -{ - /* Because g_evtdev is static external all fields initially zero so no - * need to reinitialized those. - */ - oz_trace("Event tracing initialized\n"); - spin_lock_init(&g_evtdev.lock); - atomic_set(&g_evtdev.users, 0); -} -/*------------------------------------------------------------------------------ - * Context: process - */ -void oz_event_term(void) -{ - oz_trace("Event tracing terminated\n"); -} -/*------------------------------------------------------------------------------ - * Context: any - */ -void oz_event_log2(u8 evt, u8 ctx1, u16 ctx2, void *ctx3, unsigned ctx4) -{ - unsigned long irqstate; - int ix; - spin_lock_irqsave(&g_evtdev.lock, irqstate); - ix = (g_evtdev.evt_in + 1) & (OZ_MAX_EVTS - 1); - if (ix != g_evtdev.evt_out) { - struct oz_event *e = &g_evtdev.evts[g_evtdev.evt_in]; - e->jiffies = jiffies; - e->evt = evt; - e->ctx1 = ctx1; - e->ctx2 = ctx2; - e->ctx3 = (__u32)(unsigned long)ctx3; - e->ctx4 = ctx4; - g_evtdev.evt_in = ix; - } else { - g_evtdev.missed_events++; - } - spin_unlock_irqrestore(&g_evtdev.lock, irqstate); -} -/*------------------------------------------------------------------------------ - * Context: process - */ -#ifdef CONFIG_DEBUG_FS -static void oz_events_clear(struct oz_evtdev *dev) -{ - unsigned long irqstate; - oz_trace("Clearing events\n"); - spin_lock_irqsave(&dev->lock, irqstate); - dev->evt_in = dev->evt_out = 0; - dev->missed_events = 0; - spin_unlock_irqrestore(&dev->lock, irqstate); -} -/*------------------------------------------------------------------------------ - * Context: process - */ -static int oz_events_open(struct inode *inode, struct file *filp) -{ - oz_trace("oz_evt_open()\n"); - oz_trace("Open flags: 0x%x\n", filp->f_flags); - if (atomic_add_return(1, &g_evtdev.users) == 1) { - oz_events_clear(&g_evtdev); - return nonseekable_open(inode, filp); - } else { - atomic_dec(&g_evtdev.users); - return -EBUSY; - } -} -/*------------------------------------------------------------------------------ - * Context: process - */ -static int oz_events_release(struct inode *inode, struct file *filp) -{ - oz_events_clear(&g_evtdev); - atomic_dec(&g_evtdev.users); - g_evt_mask = 0; - oz_trace("oz_evt_release()\n"); - return 0; -} -/*------------------------------------------------------------------------------ - * Context: process - */ -static ssize_t oz_events_read(struct file *filp, char __user *buf, size_t count, - loff_t *fpos) -{ - struct oz_evtdev *dev = &g_evtdev; - int rc = 0; - int nb_evts = count / sizeof(struct oz_event); - int n; - int sz; - - n = dev->evt_in - dev->evt_out; - if (n < 0) - n += OZ_MAX_EVTS; - if (nb_evts > n) - nb_evts = n; - if (nb_evts == 0) - goto out; - n = OZ_MAX_EVTS - dev->evt_out; - if (n > nb_evts) - n = nb_evts; - sz = n * sizeof(struct oz_event); - if (copy_to_user(buf, &dev->evts[dev->evt_out], sz)) { - rc = -EFAULT; - goto out; - } - if (n == nb_evts) - goto out2; - n = nb_evts - n; - if (copy_to_user(buf + sz, dev->evts, n * sizeof(struct oz_event))) { - rc = -EFAULT; - goto out; - } -out2: - dev->evt_out = (dev->evt_out + nb_evts) & (OZ_MAX_EVTS - 1); - rc = nb_evts * sizeof(struct oz_event); -out: - return rc; -} -/*------------------------------------------------------------------------------ - */ -static const struct file_operations oz_events_fops = { - .owner = THIS_MODULE, - .open = oz_events_open, - .release = oz_events_release, - .read = oz_events_read, -}; -/*------------------------------------------------------------------------------ - * Context: process - */ -void oz_debugfs_init(void) -{ - struct dentry *parent; - - parent = debugfs_create_dir("ozwpan", NULL); - if (parent == NULL) { - oz_trace("Failed to create debugfs directory ozmo\n"); - return; - } else { - g_evtdev.root_dir = parent; - if (debugfs_create_file("events", S_IRUSR, parent, NULL, - &oz_events_fops) == NULL) - oz_trace("Failed to create file ozmo/events\n"); - if (debugfs_create_x32("event_mask", S_IRUSR | S_IWUSR, parent, - &g_evt_mask) == NULL) - oz_trace("Failed to create file ozmo/event_mask\n"); - } -} -/*------------------------------------------------------------------------------ - * Context: process - */ -void oz_debugfs_remove(void) -{ - debugfs_remove_recursive(g_evtdev.root_dir); -} -#endif /* CONFIG_DEBUG_FS */ -#endif /* WANT_EVENT_TRACE */ |