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[POWERPC] Convert powermac ide blink to new led infrastructure

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This patch removes the old pmac ide led blink code and
adds generic LED subsystem support for the LED.

It maintains backward compatibility with the old
BLK_DEV_IDE_PMAC_BLINK Kconfig option which now
simply selects the new code and influences the
default trigger.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Johannes Berg 2006-06-21 12:11:16 +02:00 committed by Paul Mackerras
parent 266bee8869
commit 70c3967d4f
5 changed files with 164 additions and 126 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/ide/Kconfig
View file

@ -774,11 +774,18 @@ config BLK_DEV_IDEDMA_PMAC
performance.
config BLK_DEV_IDE_PMAC_BLINK
bool "Blink laptop LED on drive activity"
bool "Blink laptop LED on drive activity (DEPRECATED)"
depends on BLK_DEV_IDE_PMAC && ADB_PMU
select ADB_PMU_LED
select LEDS_TRIGGERS
select LEDS_TRIGGER_IDE_DISK
help
This option enables the use of the sleep LED as a hard drive
activity LED.
This option is deprecated, it only selects ADB_PMU_LED and
LEDS_TRIGGER_IDE_DISK and changes the code in the new led class
device to default to the ide-disk trigger (which should be set
from userspace via sysfs).
config BLK_DEV_IDE_SWARM
tristate "IDE for Sibyte evaluation boards"

125
drivers/ide/ppc/pmac.c
View file

@ -420,107 +420,6 @@ static void pmac_ide_kauai_selectproc(ide_drive_t *drive);
#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
/*
* Below is the code for blinking the laptop LED along with hard
* disk activity.
*/
#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK
/* Set to 50ms minimum led-on time (also used to limit frequency
* of requests sent to the PMU
*/
#define PMU_HD_BLINK_TIME (HZ/50)
static struct adb_request pmu_blink_on, pmu_blink_off;
static spinlock_t pmu_blink_lock;
static unsigned long pmu_blink_stoptime;
static int pmu_blink_ledstate;
static struct timer_list pmu_blink_timer;
static int pmu_ide_blink_enabled;
static void
pmu_hd_blink_timeout(unsigned long data)
{
unsigned long flags;
spin_lock_irqsave(&pmu_blink_lock, flags);
/* We may have been triggered again in a racy way, check
* that we really want to switch it off
*/
if (time_after(pmu_blink_stoptime, jiffies))
goto done;
/* Previous req. not complete, try 100ms more */
if (pmu_blink_off.complete == 0)
mod_timer(&pmu_blink_timer, jiffies + PMU_HD_BLINK_TIME);
else if (pmu_blink_ledstate) {
pmu_request(&pmu_blink_off, NULL, 4, 0xee, 4, 0, 0);
pmu_blink_ledstate = 0;
}
done:
spin_unlock_irqrestore(&pmu_blink_lock, flags);
}
static void
pmu_hd_kick_blink(void *data, int rw)
{
unsigned long flags;
pmu_blink_stoptime = jiffies + PMU_HD_BLINK_TIME;
wmb();
mod_timer(&pmu_blink_timer, pmu_blink_stoptime);
/* Fast path when LED is already ON */
if (pmu_blink_ledstate == 1)
return;
spin_lock_irqsave(&pmu_blink_lock, flags);
if (pmu_blink_on.complete && !pmu_blink_ledstate) {
pmu_request(&pmu_blink_on, NULL, 4, 0xee, 4, 0, 1);
pmu_blink_ledstate = 1;
}
spin_unlock_irqrestore(&pmu_blink_lock, flags);
}
static int
pmu_hd_blink_init(void)
{
struct device_node *dt;
const char *model;
/* Currently, I only enable this feature on KeyLargo based laptops,
* older laptops may support it (at least heathrow/paddington) but
* I don't feel like loading those venerable old machines with so
* much additional interrupt & PMU activity...
*/
if (pmu_get_model() != PMU_KEYLARGO_BASED)
return 0;
dt = of_find_node_by_path("/");
if (dt == NULL)
return 0;
model = (const char *)get_property(dt, "model", NULL);
if (model == NULL)
return 0;
if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 &&
strncmp(model, "iBook", strlen("iBook")) != 0) {
of_node_put(dt);
return 0;
}
of_node_put(dt);
pmu_blink_on.complete = 1;
pmu_blink_off.complete = 1;
spin_lock_init(&pmu_blink_lock);
init_timer(&pmu_blink_timer);
pmu_blink_timer.function = pmu_hd_blink_timeout;
return 1;
}
#endif /* CONFIG_BLK_DEV_IDE_PMAC_BLINK */
/*
* N.B. this can't be an initfunc, because the media-bay task can
* call ide_[un]register at any time.
@ -1192,23 +1091,6 @@ pmac_ide_do_suspend(ide_hwif_t *hwif)
pmif->timings[0] = 0;
pmif->timings[1] = 0;
#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK
/* Note: This code will be called for every hwif, thus we'll
* try several time to stop the LED blinker timer, but that
* should be harmless
*/
if (pmu_ide_blink_enabled) {
unsigned long flags;
/* Make sure we don't hit the PMU blink */
spin_lock_irqsave(&pmu_blink_lock, flags);
if (pmu_blink_ledstate)
del_timer(&pmu_blink_timer);
pmu_blink_ledstate = 0;
spin_unlock_irqrestore(&pmu_blink_lock, flags);
}
#endif /* CONFIG_BLK_DEV_IDE_PMAC_BLINK */
disable_irq(pmif->irq);
/* The media bay will handle itself just fine */
@ -1376,13 +1258,6 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
hwif->selectproc = pmac_ide_selectproc;
hwif->speedproc = pmac_ide_tune_chipset;
#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK
pmu_ide_blink_enabled = pmu_hd_blink_init();
if (pmu_ide_blink_enabled)
hwif->led_act = pmu_hd_kick_blink;
#endif
printk(KERN_INFO "ide%d: Found Apple %s controller, bus ID %d%s, irq %d\n",
hwif->index, model_name[pmif->kind], pmif->aapl_bus_id,
pmif->mediabay ? " (mediabay)" : "", hwif->irq);

11
drivers/macintosh/Kconfig
View file

@ -78,6 +78,17 @@ config ADB_PMU
this device; you should do so if your machine is one of those
mentioned above.
config ADB_PMU_LED
bool "Support for the Power/iBook front LED"
depends on ADB_PMU
select LEDS_CLASS
help
Support the front LED on Power/iBooks as a generic LED that can
be triggered by any of the supported triggers. To get the
behaviour of the old CONFIG_BLK_DEV_IDE_PMAC_BLINK, select this
and the ide-disk LED trigger and configure appropriately through
sysfs.
config PMAC_SMU
bool "Support for SMU based PowerMacs"
depends on PPC_PMAC64

1
drivers/macintosh/Makefile
View file

@ -12,6 +12,7 @@ obj-$(CONFIG_INPUT_ADBHID) += adbhid.o
obj-$(CONFIG_ANSLCD) += ans-lcd.o
obj-$(CONFIG_ADB_PMU) += via-pmu.o via-pmu-event.o
obj-$(CONFIG_ADB_PMU_LED) += via-pmu-led.o
obj-$(CONFIG_PMAC_BACKLIGHT) += via-pmu-backlight.o
obj-$(CONFIG_ADB_CUDA) += via-cuda.o
obj-$(CONFIG_PMAC_APM_EMU) += apm_emu.o

144
drivers/macintosh/via-pmu-led.c Normal file
View file

@ -0,0 +1,144 @@
/*
* via-pmu LED class device
*
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/leds.h>
#include <linux/adb.h>
#include <linux/pmu.h>
#include <asm/prom.h>
static spinlock_t pmu_blink_lock;
static struct adb_request pmu_blink_req;
/* -1: no change, 0: request off, 1: request on */
static int requested_change;
static int sleeping;
static void pmu_req_done(struct adb_request * req)
{
unsigned long flags;
spin_lock_irqsave(&pmu_blink_lock, flags);
/* if someone requested a change in the meantime
* (we only see the last one which is fine)
* then apply it now */
if (requested_change != -1 && !sleeping)
pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
/* reset requested change */
requested_change = -1;
spin_unlock_irqrestore(&pmu_blink_lock, flags);
}
static void pmu_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
unsigned long flags;
spin_lock_irqsave(&pmu_blink_lock, flags);
switch (brightness) {
case LED_OFF:
requested_change = 0;
break;
case LED_FULL:
requested_change = 1;
break;
default:
goto out;
break;
}
/* if request isn't done, then don't do anything */
if (pmu_blink_req.complete && !sleeping)
pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
out:
spin_unlock_irqrestore(&pmu_blink_lock, flags);
}
static struct led_classdev pmu_led = {
.name = "pmu-front-led",
#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK
.default_trigger = "ide-disk",
#endif
.brightness_set = pmu_led_set,
};
#ifdef CONFIG_PM
static int pmu_led_sleep_call(struct pmu_sleep_notifier *self, int when)
{
unsigned long flags;
spin_lock_irqsave(&pmu_blink_lock, flags);
switch (when) {
case PBOOK_SLEEP_REQUEST:
sleeping = 1;
break;
case PBOOK_WAKE:
sleeping = 0;
break;
default:
/* do nothing */
break;
}
spin_unlock_irqrestore(&pmu_blink_lock, flags);
return PBOOK_SLEEP_OK;
}
static struct pmu_sleep_notifier via_pmu_led_sleep_notif = {
.notifier_call = pmu_led_sleep_call,
};
#endif
static int __init via_pmu_led_init(void)
{
struct device_node *dt;
const char *model;
/* only do this on keylargo based models */
if (pmu_get_model() != PMU_KEYLARGO_BASED)
return -ENODEV;
dt = of_find_node_by_path("/");
if (dt == NULL)
return -ENODEV;
model = (const char *)get_property(dt, "model", NULL);
if (model == NULL)
return -ENODEV;
if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 &&
strncmp(model, "iBook", strlen("iBook")) != 0) {
of_node_put(dt);
/* ignore */
return -ENODEV;
}
of_node_put(dt);
spin_lock_init(&pmu_blink_lock);
/* no outstanding req */
pmu_blink_req.complete = 1;
pmu_blink_req.done = pmu_req_done;
#ifdef CONFIG_PM
pmu_register_sleep_notifier(&via_pmu_led_sleep_notif);
#endif
return led_classdev_register(NULL, &pmu_led);
}
late_initcall(via_pmu_led_init);