Fix pbutton to signal init, so it shuts down safely (Requires upgraded sysvinit)

Fix rbutton to do machine_power_off(), since reset if unreliable.

1 files changed, 139 insertions, 0 deletions

diff --git a/packages/linux/nslu2-kernel/2.6/nslu2-io_rpbutton.patch b/packages/linux/nslu2-kernel/2.6/nslu2-io_rpbutton.patch
new file mode 100644
index 0000000000..b5ce101d68
--- /dev/null
+++ b/packages/linux/nslu2-kernel/2.6/nslu2-io_rpbutton.patch
@@ -0,0 +1,139 @@
+--- nslu2-io.c.old	2da1d3f5c0aa0804c5769588337077ddcb35c5e9
++++ linux-2.6.12.2/arch/arm/mach-ixp4xx/nslu2-io.c	e895da638b4aae16a11fafe52ae0b063645a9a12
+@@ -158,6 +158,8 @@
+ #define LED_DISK2	3
+ #define LED_ALL		4
+ 
++static int nslu2_shutdown_in_progress = 0;
++
+ static unsigned long init_jiffy = 0;			//jiffies at init time
+ static unsigned long rb_presses = 0;			//number of reset button presses
+ static unsigned long ontime = 50;
+@@ -503,40 +505,20 @@
+ static irqreturn_t n2pb_handler (int irq, void *dev_id, struct pt_regs *regs)
+ {
+ 	void *ret;
+-	
+-	wake_up(&n2pb_waitq);	
+-	remove_proc_entry(PWR_OFF_STR, NULL);		//no parent	
+-	n2_buzz(N2_BEEP_PITCH_MED, N2_BEEP_DUR_MED);
+-	ret = create_proc_entry(PWR_OFF_STR, 0, NULL);
+-	nslu2_io_debug((KERN_DEBUG "cpe ret = %p\n", ret));
+-
+-// WARNING: This is RUDE...it unconditionally pulls the power plug.
+-// Your data will be at risk...since this is just a test system
+-// I am leaving it enabled...eventually userland needs to get the
+-// message, do an orderly shutdown and use an ioctl or something in
+-// /proc/powerdowm to actually have us pull the plug.
+-
+-	machine_power_off();
+-
++	if (!nslu2_shutdown_in_progress++) {			
++		wake_up(&n2pb_waitq);	
++		remove_proc_entry(PWR_OFF_STR, NULL);		//no parent	
++		n2_buzz(N2_BEEP_PITCH_HIGH, N2_BEEP_DUR_SHORT); // Short, high-pitched "OK"
++		ret = create_proc_entry(PWR_OFF_STR, 0, NULL);
++		nslu2_io_debug((KERN_DEBUG "Powerbutton pressed. Shutting down. cpe ret = %p\n", ret));
++		kill_proc(1,SIGINT,1);				// Signal init to shut down
++	} else {
++	        n2_buzz(N2_BEEP_PITCH_LOW, N2_BEEP_DUR_MED);    // Make a scary noise!
++		nslu2_io_debug((KERN_DEBUG "Powerbutton pressed while already in shutdown")); // Whine!
++	}				 
+ 	return IRQ_HANDLED;
+ }
+ 
+-//==================================================================================================
+-//
+-//static void do_rb_timeout(unsigned long data)
+-//{
+-//	int i;
+-//
+-//	for (i = 0; i < rb_presses; i++)
+-//		n2_buzz(N2_BEEP_PITCH_MED,N2_BEEP_DUR_SHORT);
+-//	return;
+-//}
+-//
+-//==================================================================================================
+-// does nothing -- waiting for userland to define
+-// This thing is sorta braindead...edge triggered IRQs aren't available in the drivers yet...so
+-// we hang in a loop until the button is no longer pressed
+-
+ struct testr {
+ 	int	ctl;
+ 	long	param;
+@@ -544,72 +526,11 @@
+ 
+ static irqreturn_t n2rb_handler (int irq, void *dev_id, struct pt_regs *regs)
+ {
++//	This doesn't reset the NSLU2. It powers it off. Close enough, since reset is unreliable
+ 
+-	static struct testr test[] = {
+-				 { N2LM_ALL_OFF,0 },
+-				 { N2LM_ON,0 },
+-				 { N2LM_OFF,0 },
+-				 { N2LM_ON,1 },
+-				 { N2LM_ALL_OFF,1 },
+-				 { N2LM_ON,2 },
+-				 { N2LM_OFF,2 },
+-				 { N2LM_ON,3 },
+-				 { N2LM_OFF,3 },
+-				 { N2LM_BLINK,0 },
+-				 { N2LM_OFF,0 },
+-				 { N2LM_BLINK,1 },
+-				 { N2LM_OFF,1 },
+-				 { N2LM_BLINK,2 },
+-				 { N2LM_OFF,2 },
+-				 { N2LM_BLINK,3 },
+-				 { N2LM_OFF,3 },
+-				 { N2LM_ALL_OFF,0 },
+-				 { N2LM_ALT,1 },
+-				 { N2LM_OFF,1 },
+-				 { N2LM_ALL_ON,0 }
+-	};
+-
+-	nslu2_io_debug(("Reset Entry IRQ =%d Presses = %d Jiffies = %08lx\tIO = %x\tIOW = %x\n", irq, rb_presses, jiffies, (int)_IO('M',rb_presses), (int)_IOW('M',rb_presses,long)));
+-
+ 	wake_up(&n2rb_waitq);	
+-  	while ((*IXP4XX_GPIO_GPINR & GPIO_RB_BM) == 0)
+-		;					//wait for button release
+-
+-	if (rb_presses > 20) 
+-		rb_presses = 0;
+-	tone = (rb_presses * 50) + 200;
+-	ontime = (rb_presses*10) + 100;
+-	offtime = 500 - (rb_presses*20);
+-	nslu2_io_debug(("Ontime = %d\tOfftime = %d\tTone = %d\n",ontime,offtime,tone));
+- 	rb_presses++;
+-
+-	n2bz_ioctl(NULL,NULL, N2BZ_BEEPS, rb_presses);	
+-	n2lm_ioctl(NULL,NULL, test[rb_presses].ctl, test[rb_presses].param);
+-//	if (rb_presses == 0) {
+-//		init_jiffy = jiffies;
+-//		init_timer (&n2rb_timer);
+-//		n2rb_timer.function = do_rb_timeout;
+-//	};
+-//
+-//	if (rb_presses == 8)
+-//		rb_presses = 0;
+-//	if (rb_presses & 1)
+-//		n2lm_ledon(test[rb_presses]);
+-//	else
+-//		n2lm_ledoff(test[rb_presses]);
+-//	
+-//	n2rb_timer.expires = (jiffies + RB_DELAY);
+-//	add_timer (&n2rb_timer);
+-//	if (rb_presses < 5) {
+-//		if (rb_presses > 0)
+-//			n2lm_ledoff(rb_presses);
+-//		n2lm_ledon(++rb_presses);
+-//		n2lm_timer_start(rb_presses);
+-//	};
+-
+-	nslu2_io_debug((KERN_DEBUG "Reset Exit IRQ=%d Presses= %d Jiffies= %08lx\n", irq, rb_presses, jiffies));
+-	return IRQ_HANDLED;
+-
++	machine_power_off();
++	return IRQ_HANDLED;		// So we don't get a nobody cared error :-P
+ }
+ 
+ //==================================================================================================