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path: root/drivers/parisc/led.c
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Diffstat (limited to 'drivers/parisc/led.c')
-rw-r--r--drivers/parisc/led.c176
1 files changed, 96 insertions, 80 deletions
diff --git a/drivers/parisc/led.c b/drivers/parisc/led.c
index 3627a2d7f79..b4824313199 100644
--- a/drivers/parisc/led.c
+++ b/drivers/parisc/led.c
@@ -3,7 +3,7 @@
*
* (c) Copyright 2000 Red Hat Software
* (c) Copyright 2000 Helge Deller <hdeller@redhat.com>
- * (c) Copyright 2001-2005 Helge Deller <deller@gmx.de>
+ * (c) Copyright 2001-2009 Helge Deller <deller@gmx.de>
* (c) Copyright 2001 Randolph Chung <tausq@debian.org>
*
* This program is free software; you can redistribute it and/or modify
@@ -23,7 +23,6 @@
* David Pye <dmp@davidmpye.dyndns.org>
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/stddef.h> /* for offsetof() */
#include <linux/init.h>
@@ -39,6 +38,7 @@
#include <linux/kernel_stat.h>
#include <linux/reboot.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/ctype.h>
#include <linux/blkdev.h>
#include <linux/workqueue.h>
@@ -64,11 +64,12 @@ static unsigned int led_diskio __read_mostly = 1;
static unsigned int led_lanrxtx __read_mostly = 1;
static char lcd_text[32] __read_mostly;
static char lcd_text_default[32] __read_mostly;
+static int lcd_no_led_support __read_mostly = 0; /* KittyHawk doesn't support LED on its LCD */
static struct workqueue_struct *led_wq;
-static void led_work_func(void *);
-static DECLARE_WORK(led_task, led_work_func, NULL);
+static void led_work_func(struct work_struct *);
+static DECLARE_DELAYED_WORK(led_task, led_work_func);
#if 0
#define DPRINTK(x) printk x
@@ -115,7 +116,7 @@ lcd_info __attribute__((aligned(8))) __read_mostly =
.lcd_width = 16,
.lcd_cmd_reg_addr = KITTYHAWK_LCD_CMD,
.lcd_data_reg_addr = KITTYHAWK_LCD_DATA,
- .min_cmd_delay = 40,
+ .min_cmd_delay = 80,
.reset_cmd1 = 0x80,
.reset_cmd2 = 0xc0,
};
@@ -135,9 +136,12 @@ static int start_task(void)
/* Display the default text now */
if (led_type == LED_HASLCD) lcd_print( lcd_text_default );
+ /* KittyHawk has no LED support on its LCD */
+ if (lcd_no_led_support) return 0;
+
/* Create the work queue and queue the LED task */
led_wq = create_singlethread_workqueue("led_wq");
- queue_work(led_wq, &led_task);
+ queue_delayed_work(led_wq, &led_task, 0);
return 0;
}
@@ -148,60 +152,49 @@ device_initcall(start_task);
static void (*led_func_ptr) (unsigned char) __read_mostly;
#ifdef CONFIG_PROC_FS
-static int led_proc_read(char *page, char **start, off_t off, int count,
- int *eof, void *data)
+static int led_proc_show(struct seq_file *m, void *v)
{
- char *out = page;
- int len;
-
- switch ((long)data)
+ switch ((long)m->private)
{
case LED_NOLCD:
- out += sprintf(out, "Heartbeat: %d\n", led_heartbeat);
- out += sprintf(out, "Disk IO: %d\n", led_diskio);
- out += sprintf(out, "LAN Rx/Tx: %d\n", led_lanrxtx);
+ seq_printf(m, "Heartbeat: %d\n", led_heartbeat);
+ seq_printf(m, "Disk IO: %d\n", led_diskio);
+ seq_printf(m, "LAN Rx/Tx: %d\n", led_lanrxtx);
break;
case LED_HASLCD:
- out += sprintf(out, "%s\n", lcd_text);
+ seq_printf(m, "%s\n", lcd_text);
break;
default:
- *eof = 1;
return 0;
}
+ return 0;
+}
- len = out - page - off;
- if (len < count) {
- *eof = 1;
- if (len <= 0) return 0;
- } else {
- len = count;
- }
- *start = page + off;
- return len;
+static int led_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, led_proc_show, PDE_DATA(inode));
}
-static int led_proc_write(struct file *file, const char *buf,
- unsigned long count, void *data)
+
+static ssize_t led_proc_write(struct file *file, const char *buf,
+ size_t count, loff_t *pos)
{
- char *cur, lbuf[count + 1];
+ void *data = PDE_DATA(file_inode(file));
+ char *cur, lbuf[32];
int d;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- memset(lbuf, 0, count + 1);
+ if (count >= sizeof(lbuf))
+ count = sizeof(lbuf)-1;
if (copy_from_user(lbuf, buf, count))
return -EFAULT;
+ lbuf[count] = 0;
cur = lbuf;
- /* skip initial spaces */
- while (*cur && isspace(*cur))
- {
- cur++;
- }
-
switch ((long)data)
{
case LED_NOLCD:
@@ -241,6 +234,15 @@ parse_error:
return -EINVAL;
}
+static const struct file_operations led_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = led_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = led_proc_write,
+};
+
static int __init led_create_procfs(void)
{
struct proc_dir_entry *proc_pdc_root = NULL;
@@ -250,24 +252,19 @@ static int __init led_create_procfs(void)
proc_pdc_root = proc_mkdir("pdc", 0);
if (!proc_pdc_root) return -1;
- proc_pdc_root->owner = THIS_MODULE;
- ent = create_proc_entry("led", S_IFREG|S_IRUGO|S_IWUSR, proc_pdc_root);
- if (!ent) return -1;
- ent->nlink = 1;
- ent->data = (void *)LED_NOLCD; /* LED */
- ent->read_proc = led_proc_read;
- ent->write_proc = led_proc_write;
- ent->owner = THIS_MODULE;
+
+ if (!lcd_no_led_support)
+ {
+ ent = proc_create_data("led", S_IRUGO|S_IWUSR, proc_pdc_root,
+ &led_proc_fops, (void *)LED_NOLCD); /* LED */
+ if (!ent) return -1;
+ }
if (led_type == LED_HASLCD)
{
- ent = create_proc_entry("lcd", S_IFREG|S_IRUGO|S_IWUSR, proc_pdc_root);
+ ent = proc_create_data("lcd", S_IRUGO|S_IWUSR, proc_pdc_root,
+ &led_proc_fops, (void *)LED_HASLCD); /* LCD */
if (!ent) return -1;
- ent->nlink = 1;
- ent->data = (void *)LED_HASLCD; /* LCD */
- ent->read_proc = led_proc_read;
- ent->write_proc = led_proc_write;
- ent->owner = THIS_MODULE;
}
return 0;
@@ -357,32 +354,28 @@ static __inline__ int led_get_net_activity(void)
#ifndef CONFIG_NET
return 0;
#else
- static unsigned long rx_total_last, tx_total_last;
- unsigned long rx_total, tx_total;
+ static u64 rx_total_last, tx_total_last;
+ u64 rx_total, tx_total;
struct net_device *dev;
int retval;
rx_total = tx_total = 0;
- /* we are running as a workqueue task, so locking dev_base
- * for reading should be OK */
- read_lock(&dev_base_lock);
+ /* we are running as a workqueue task, so we can use an RCU lookup */
rcu_read_lock();
- for (dev = dev_base; dev; dev = dev->next) {
- struct net_device_stats *stats;
+ for_each_netdev_rcu(&init_net, dev) {
+ const struct rtnl_link_stats64 *stats;
+ struct rtnl_link_stats64 temp;
struct in_device *in_dev = __in_dev_get_rcu(dev);
if (!in_dev || !in_dev->ifa_list)
continue;
- if (LOOPBACK(in_dev->ifa_list->ifa_local))
- continue;
- if (!dev->get_stats)
+ if (ipv4_is_loopback(in_dev->ifa_list->ifa_local))
continue;
- stats = dev->get_stats(dev);
+ stats = dev_get_stats(dev, &temp);
rx_total += stats->rx_packets;
tx_total += stats->tx_packets;
}
rcu_read_unlock();
- read_unlock(&dev_base_lock);
retval = 0;
@@ -411,16 +404,17 @@ static __inline__ int led_get_net_activity(void)
static __inline__ int led_get_diskio_activity(void)
{
static unsigned long last_pgpgin, last_pgpgout;
- struct page_state pgstat;
+ unsigned long events[NR_VM_EVENT_ITEMS];
int changed;
- get_full_page_state(&pgstat); /* get no of sectors in & out */
+ all_vm_events(events);
/* Just use a very simple calculation here. Do not care about overflow,
since we only want to know if there was activity or not. */
- changed = (pgstat.pgpgin != last_pgpgin) || (pgstat.pgpgout != last_pgpgout);
- last_pgpgin = pgstat.pgpgin;
- last_pgpgout = pgstat.pgpgout;
+ changed = (events[PGPGIN] != last_pgpgin) ||
+ (events[PGPGOUT] != last_pgpgout);
+ last_pgpgin = events[PGPGIN];
+ last_pgpgout = events[PGPGOUT];
return (changed ? LED_DISK_IO : 0);
}
@@ -443,7 +437,7 @@ static __inline__ int led_get_diskio_activity(void)
#define LED_UPDATE_INTERVAL (1 + (HZ*19/1000))
-static void led_work_func (void *unused)
+static void led_work_func (struct work_struct *unused)
{
static unsigned long last_jiffies;
static unsigned long count_HZ; /* counter in range 0..HZ */
@@ -473,9 +467,20 @@ static void led_work_func (void *unused)
if (likely(led_lanrxtx)) currentleds |= led_get_net_activity();
if (likely(led_diskio)) currentleds |= led_get_diskio_activity();
- /* blink all LEDs twice a second if we got an Oops (HPMC) */
- if (unlikely(oops_in_progress))
- currentleds = (count_HZ<=(HZ/2)) ? 0 : 0xff;
+ /* blink LEDs if we got an Oops (HPMC) */
+ if (unlikely(oops_in_progress)) {
+ if (boot_cpu_data.cpu_type >= pcxl2) {
+ /* newer machines don't have loadavg. LEDs, so we
+ * let all LEDs blink twice per second instead */
+ currentleds = (count_HZ <= (HZ/2)) ? 0 : 0xff;
+ } else {
+ /* old machines: blink loadavg. LEDs twice per second */
+ if (count_HZ <= (HZ/2))
+ currentleds &= ~(LED4|LED5|LED6|LED7);
+ else
+ currentleds |= (LED4|LED5|LED6|LED7);
+ }
+ }
if (currentleds != lastleds)
{
@@ -499,11 +504,16 @@ static int led_halt(struct notifier_block *, unsigned long, void *);
static struct notifier_block led_notifier = {
.notifier_call = led_halt,
};
+static int notifier_disabled = 0;
static int led_halt(struct notifier_block *nb, unsigned long event, void *buf)
{
char *txt;
-
+
+ if (notifier_disabled)
+ return NOTIFY_OK;
+
+ notifier_disabled = 1;
switch (event) {
case SYS_RESTART: txt = "SYSTEM RESTART";
break;
@@ -516,7 +526,7 @@ static int led_halt(struct notifier_block *nb, unsigned long event, void *buf)
/* Cancel the work item and delete the queue */
if (led_wq) {
- cancel_rearming_delayed_workqueue(led_wq, &led_task);
+ cancel_delayed_work_sync(&led_task);
destroy_workqueue(led_wq);
led_wq = NULL;
}
@@ -527,7 +537,6 @@ static int led_halt(struct notifier_block *nb, unsigned long event, void *buf)
if (led_func_ptr)
led_func_ptr(0xff); /* turn all LEDs ON */
- unregister_reboot_notifier(&led_notifier);
return NOTIFY_OK;
}
@@ -575,7 +584,7 @@ int __init register_led_driver(int model, unsigned long cmd_reg, unsigned long d
default:
printk(KERN_ERR "%s: Wrong LCD/LED model %d !\n",
- __FUNCTION__, lcd_info.model);
+ __func__, lcd_info.model);
return 1;
}
@@ -586,7 +595,7 @@ int __init register_led_driver(int model, unsigned long cmd_reg, unsigned long d
/* Ensure the work is queued */
if (led_wq) {
- queue_work(led_wq, &led_task);
+ queue_delayed_work(led_wq, &led_task, 0);
}
return 0;
@@ -627,7 +636,7 @@ void __init register_led_regions(void)
** avoid a race condition while writing the CMD/DATA register pair.
**
*/
-int lcd_print( char *str )
+int lcd_print( const char *str )
{
int i;
@@ -636,7 +645,7 @@ int lcd_print( char *str )
/* temporarily disable the led work task */
if (led_wq)
- cancel_rearming_delayed_workqueue(led_wq, &led_task);
+ cancel_delayed_work_sync(&led_task);
/* copy display string to buffer for procfs */
strlcpy(lcd_text, str, sizeof(lcd_text));
@@ -656,7 +665,7 @@ int lcd_print( char *str )
/* re-queue the work */
if (led_wq) {
- queue_work(led_wq, &led_task);
+ queue_delayed_work(led_wq, &led_task, 0);
}
return lcd_info.lcd_width;
@@ -680,7 +689,7 @@ int __init led_init(void)
int ret;
snprintf(lcd_text_default, sizeof(lcd_text_default),
- "Linux %s", system_utsname.release);
+ "Linux %s", init_utsname()->release);
/* Work around the buggy PDC of KittyHawk-machines */
switch (CPU_HVERSION) {
@@ -691,6 +700,7 @@ int __init led_init(void)
case 0x58B: /* KittyHawk DC2 100 (K200) */
printk(KERN_INFO "%s: KittyHawk-Machine (hversion 0x%x) found, "
"LED detection skipped.\n", __FILE__, CPU_HVERSION);
+ lcd_no_led_support = 1;
goto found; /* use the preinitialized values of lcd_info */
}
@@ -758,6 +768,12 @@ not_found:
return 1;
}
+static void __exit led_exit(void)
+{
+ unregister_reboot_notifier(&led_notifier);
+ return;
+}
+
#ifdef CONFIG_PROC_FS
module_init(led_create_procfs)
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 17:29:33 +0000