add support for target 3c24xx (more known as Openmoko GTA02 "Freerunner") and merge it with the openmoko-target and the work Michael Buesch <mb> did

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13609 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 423 insertions, 0 deletions

diff --git a/target/linux/s3c24xx/patches/0153-introduce-charging-led-behaviour.patch.patch b/target/linux/s3c24xx/patches/0153-introduce-charging-led-behaviour.patch.patch
new file mode 100755
index 0000000000..6f510ed0cc
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0153-introduce-charging-led-behaviour.patch.patch
@@ -0,0 +1,423 @@
+From 86bec3382cd1694a3b5cd6d8796cfcbdbe5ca5ff Mon Sep 17 00:00:00 2001
+From: Andy Green <andy@openmoko.com>
+Date: Fri, 25 Jul 2008 23:06:11 +0100
+Subject: [PATCH] introduce-charging-led-behaviour.patch
+
+Creates a new behaviour requested by Will that the red LED on GTA02
+is lit during battery charging.and goes out when the battery is full.
+
+This is done by leveraging the PMU interrupts, but in one scenario
+there is no interrupt that occurs, when the battery is replaced after
+being removed with the USB power in all the while.  So a sleepy work
+function is started under those circumstances to watch for battery
+reinsertion or USB cable pull.
+
+100mA limit was not being observed under some conditions so this was
+fixed and tested with a USB cable with D+/D- disconnected.  1A
+charger behaviour was also tested.
+
+Showing the charging action exposes some inconsistency in pcf50633
+charging action.  If your battery is nearly full, it will keep
+charging it at decreasing current even after it thinks it is at
+100% capacity for a long while.  But if you pull that same battery
+and re-insert it, the charger state machine in pcf50633 believe it is
+full and won't charge it.
+
+Signed-off-by: Andy Green <andy@openmoko.com>
+---
+ arch/arm/mach-s3c2440/mach-gta02.c |    8 ++
+ drivers/i2c/chips/pcf50633.c       |  212 ++++++++++++++++++++++++++++++++++--
+ include/linux/pcf506xx.h           |    2 +
+ 3 files changed, 214 insertions(+), 8 deletions(-)
+
+diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
+index 601f7bc..d7882ea 100644
+--- a/arch/arm/mach-s3c2440/mach-gta02.c
++++ b/arch/arm/mach-s3c2440/mach-gta02.c
+@@ -437,6 +437,14 @@ static int pmu_callback(struct device *dev, unsigned int feature,
+ 		case PMU_EVT_USB_REMOVE:
+ 			pcf50633_charge_enable(pcf50633_global, 0);
+ 			break;
++		case PMU_EVT_CHARGER_IDLE:
++			/* printk(KERN_ERR"PMU_EVT_CHARGER_IDLE\n"); */
++			neo1973_gpb_setpin(GTA02_GPIO_AUX_LED, 0);
++			break;
++		case PMU_EVT_CHARGER_ACTIVE:
++			/* printk(KERN_ERR"PMU_EVT_CHARGER_ACTIVE\n"); */
++			neo1973_gpb_setpin(GTA02_GPIO_AUX_LED, 1);
++			break;
+ 		default:
+ 			break;
+ 		}
+diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
+index 8ba81d2..38cabd2 100644
+--- a/drivers/i2c/chips/pcf50633.c
++++ b/drivers/i2c/chips/pcf50633.c
+@@ -47,6 +47,7 @@
+ #include <linux/platform_device.h>
+ #include <linux/pcf50633.h>
+ #include <linux/apm-emulation.h>
++#include <linux/jiffies.h>
+ 
+ #include <asm/mach-types.h>
+ #include <asm/arch/gta02.h>
+@@ -121,8 +122,23 @@ struct pcf50633_data {
+ 	int onkey_seconds;
+ 	int irq;
+ 	int have_been_suspended;
++	int usb_removal_count;
+ 	unsigned char pcfirq_resume[5];
+ 
++	/* if he pulls battery while charging, we notice that and correctly
++	 * report that the charger is idle.  But there is no interrupt that
++	 * fires if he puts a battery back in and charging resumes.  So when
++	 * the battery is pulled, we run this work function looking for
++	 * either charger resumption or USB cable pull
++	 */
++	struct mutex working_lock_nobat;
++	struct work_struct work_nobat;
++	int working_nobat;
++	int usb_removal_count_nobat;
++	int jiffies_last_bat_ins;
++
++	int last_curlim_set;
++
+ 	int coldplug_done; /* cleared by probe, set by first work service */
+ 	int flag_bat_voltage_read; /* ipc to /sys batt voltage read func */
+ 
+@@ -259,6 +275,8 @@ static u_int16_t async_adc_complete(struct pcf50633_data *pcf)
+ 			(__reg_read(pcf, PCF50633_REG_ADCS3) &
+ 						  PCF50633_ADCS3_ADCDAT1L_MASK);
+ 
++	DEBUGPC("adc result = %d\n", ret);
++
+ 	return ret;
+ }
+ 
+@@ -512,8 +530,7 @@ static void configure_pmu_for_charger(struct pcf50633_data *pcf,
+ {
+ 	switch (type) {
+ 	case CHARGER_TYPE_NONE:
+-		__reg_write(pcf, PCF50633_REG_MBCC7,
+-						    PCF50633_MBCC7_USB_SUSPEND);
++		pcf50633_usb_curlim_set(pcf, 0);
+ 		break;
+ 	/*
+ 	 * the PCF50633 has a feature that it will supply only excess current
+@@ -521,10 +538,19 @@ static void configure_pmu_for_charger(struct pcf50633_data *pcf,
+ 	 * 500mA setting is "up to 500mA" according to that.
+ 	 */
+ 	case CHARGER_TYPE_HOSTUSB:
+-		__reg_write(pcf, PCF50633_REG_MBCC7, PCF50633_MBCC7_USB_500mA);
++		/* USB subsystem should call pcf50633_usb_curlim_set to set
++		 * what was negotiated with the host when it is enumerated
++		 * successfully.  If we get called again after a good
++		 * negotiation, we keep what was negotiated.  (Removal of
++		 * USB plug destroys pcf->last_curlim_set to 0)
++		 */
++		if (pcf->last_curlim_set > 100)
++			pcf50633_usb_curlim_set(pcf, pcf->last_curlim_set);
++		else
++			pcf50633_usb_curlim_set(pcf, 100);
+ 		break;
+ 	case CHARGER_TYPE_1A:
+-		__reg_write(pcf, PCF50633_REG_MBCC7, PCF50633_MBCC7_USB_1000mA);
++		pcf50633_usb_curlim_set(pcf, 1000);
+ 		/*
+ 		 * stop GPO / EN_HOSTUSB power driving out on the same
+ 		 * USB power pins we have a 1A charger on right now!
+@@ -536,6 +562,12 @@ static void configure_pmu_for_charger(struct pcf50633_data *pcf,
+ 						 PCF50633_REG_GPIO1CFG) & 0xf0);
+ 		break;
+ 	}
++
++	/* max out USB fast charge current -- actual current drawn is
++	 * additionally limited by USB limit so no worries
++	 */
++	__reg_write(pcf, PCF50633_REG_MBCC5, 0xff);
++
+ }
+ 
+ static void trigger_next_adc_job_if_any(struct pcf50633_data *pcf)
+@@ -562,6 +594,49 @@ static void add_request_to_adc_queue(struct pcf50633_data *pcf,
+ 		trigger_next_adc_job_if_any(pcf);
+ }
+ 
++/* we are run when we see a NOBAT situation, because there is no interrupt
++ * source in pcf50633 that triggers on resuming charging.  It watches to see
++ * if charging resumes, it reassesses the charging source if it does.  If the
++ * USB power disappears, it is also a sign there must be a battery and it is
++ * NOT being charged, so it exits since the next move must be USB insertion for
++ * change of charger state
++ */
++
++static void pcf50633_work_nobat(struct work_struct *work)
++{
++	struct pcf50633_data *pcf =
++			container_of(work, struct pcf50633_data, work_nobat);
++
++	mutex_lock(&pcf->working_lock_nobat);
++	pcf->working_nobat = 1;
++	mutex_unlock(&pcf->working_lock_nobat);
++
++	while (1) {
++		msleep(1000);
++
++		/* there's a battery in there now? */
++		if (reg_read(pcf, PCF50633_REG_MBCS3) & 0x40) {
++
++			pcf->jiffies_last_bat_ins = jiffies;
++
++			/* figure out our charging stance */
++			add_request_to_adc_queue(pcf, PCF50633_ADCC1_MUX_ADCIN1,
++						     PCF50633_ADCC1_AVERAGE_16);
++			goto bail;
++		}
++
++		/* he pulled USB cable since we were started?  exit then */
++		if (pcf->usb_removal_count_nobat != pcf->usb_removal_count)
++			goto bail;
++	}
++
++bail:
++	mutex_lock(&pcf->working_lock_nobat);
++	pcf->working_nobat = 0;
++	mutex_unlock(&pcf->working_lock_nobat);
++}
++
++
+ static void pcf50633_work(struct work_struct *work)
+ {
+ 	struct pcf50633_data *pcf =
+@@ -674,20 +749,29 @@ static void pcf50633_work(struct work_struct *work)
+ 		if (pcf->pdata->cb)
+ 			pcf->pdata->cb(&pcf->client.dev,
+ 				       PCF50633_FEAT_MBC, PMU_EVT_USB_INSERT);
++		msleep(500); /* debounce, allow to see any ID resistor */
+ 		/* completion irq will figure out our charging stance */
+ 		add_request_to_adc_queue(pcf, PCF50633_ADCC1_MUX_ADCIN1,
+ 				     PCF50633_ADCC1_AVERAGE_16);
+ 	}
+ 	if (pcfirq[0] & PCF50633_INT1_USBREM) {
+ 		DEBUGPC("USBREM ");
++
++		pcf->usb_removal_count++;
++
+ 		/* only deal if we had understood it was in */
+ 		if (pcf->flags & PCF50633_F_USB_PRESENT) {
+ 			input_report_key(pcf->input_dev, KEY_POWER2, 0);
+ 			apm_queue_event(APM_POWER_STATUS_CHANGE);
+ 			pcf->flags &= ~PCF50633_F_USB_PRESENT;
++
+ 			if (pcf->pdata->cb)
+ 				pcf->pdata->cb(&pcf->client.dev,
+ 					PCF50633_FEAT_MBC, PMU_EVT_USB_REMOVE);
++
++			/* destroy any memory of grant of power from host */
++			pcf->last_curlim_set = 0;
++
+ 			/* completion irq will figure out our charging stance */
+ 			add_request_to_adc_queue(pcf, PCF50633_ADCC1_MUX_ADCIN1,
+ 					PCF50633_ADCC1_AVERAGE_16);
+@@ -759,6 +843,33 @@ static void pcf50633_work(struct work_struct *work)
+ 
+ 	if (pcfirq[2] & PCF50633_INT3_BATFULL) {
+ 		DEBUGPC("BATFULL ");
++
++		/* the problem is, we get a false BATFULL if we inserted battery
++		 * while USB powered.  Defeat BATFULL if we recently inserted
++		 * battery
++		 */
++
++		if ((jiffies - pcf->jiffies_last_bat_ins) < (HZ * 2)) {
++
++			DEBUGPC("*** Ignoring BATFULL ***\n");
++
++			ret = reg_read(pcf, PCF50633_REG_MBCC7) &
++					PCF56033_MBCC7_USB_MASK;
++
++
++			reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
++					 PCF56033_MBCC7_USB_MASK,
++					 PCF50633_MBCC7_USB_SUSPEND);
++
++			reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
++					 PCF56033_MBCC7_USB_MASK,
++					 ret);
++		} else {
++			if (pcf->pdata->cb)
++				pcf->pdata->cb(&pcf->client.dev,
++				       PCF50633_FEAT_MBC, PMU_EVT_CHARGER_IDLE);
++		}
++
+ 		/* FIXME: signal this to userspace */
+ 	}
+ 	if (pcfirq[2] & PCF50633_INT3_CHGHALT) {
+@@ -796,8 +907,7 @@ static void pcf50633_work(struct work_struct *work)
+ 
+ 		switch (pcf->adc_queue_mux[tail]) {
+ 		case PCF50633_ADCC1_MUX_BATSNS_RES: /* battery voltage */
+-			pcf->flag_bat_voltage_read =
+-						  async_adc_complete(pcf);
++			pcf->flag_bat_voltage_read = async_adc_complete(pcf);
+ 			break;
+ 		case PCF50633_ADCC1_MUX_ADCIN1: /* charger type */
+ 			pcf->charger_adc_result_raw = async_adc_complete(pcf);
+@@ -829,8 +939,37 @@ static void pcf50633_work(struct work_struct *work)
+ 		    (PCF50633_MBCS1_USBPRES | PCF50633_MBCS1_USBOK)) {
+ 			/*
+ 			 * hey no need to freak out, we have some kind of
+-			 * valid charger power
++			 * valid charger power to keep us going -- but note that
++			 * we are not actually charging anything
++			 */
++			if (pcf->pdata->cb)
++				pcf->pdata->cb(&pcf->client.dev,
++				       PCF50633_FEAT_MBC, PMU_EVT_CHARGER_IDLE);
++
++			reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
++					PCF50633_MBCC1_RESUME,
++					PCF50633_MBCC1_RESUME);
++	
++			/*
++			 * Well, we are not charging anything right this second
++			 * ... however in the next ~30s before we get the next
++			 * NOBAT, he might insert a battery.  So we schedule a
++			 * work function checking to see if
++			 * we started charging something during that time.
++			 * USB removal as well as charging terminates the work
++			 * function so we can't get terminally confused
+ 			 */
++			mutex_lock(&pcf->working_lock_nobat);
++			if (!pcf->working_nobat) {
++				pcf->usb_removal_count_nobat =
++							pcf->usb_removal_count;
++
++				if (!schedule_work(&pcf->work_nobat))
++					DEBUGPC("failed to schedule nobat\n");
++			}
++			mutex_unlock(&pcf->working_lock_nobat);
++
++
+ 			DEBUGPC("(NO)BAT ");
+ 		} else {
+ 			/* Really low battery voltage, we have 8 seconds left */
+@@ -1063,10 +1202,13 @@ void pcf50633_usb_curlim_set(struct pcf50633_data *pcf, int ma)
+ {
+ 	u_int8_t bits;
+ 
++	pcf->last_curlim_set = ma;
++
+ 	dev_dbg(&pcf->client.dev, "setting usb current limit to %d ma", ma);
+ 
+-	if (ma >= 1000)
++	if (ma >= 1000) {
+ 		bits = PCF50633_MBCC7_USB_1000mA;
++	}
+ 	else if (ma >= 500)
+ 		bits = PCF50633_MBCC7_USB_500mA;
+ 	else if (ma >= 100)
+@@ -1074,8 +1216,40 @@ void pcf50633_usb_curlim_set(struct pcf50633_data *pcf, int ma)
+ 	else
+ 		bits = PCF50633_MBCC7_USB_SUSPEND;
+ 
++	DEBUGPC("pcf50633_usb_curlim_set -> %dmA\n", ma);
++
++	if (!pcf->pdata->cb)
++		goto set_it;
++
++	switch (bits) {
++	case PCF50633_MBCC7_USB_100mA:
++	case PCF50633_MBCC7_USB_SUSPEND:
++		 /* no charging is gonna be happening */
++		pcf->pdata->cb(&pcf->client.dev,
++			       PCF50633_FEAT_MBC, PMU_EVT_CHARGER_IDLE);
++		break;
++	default: /* right charging context that if there is power, we charge */
++		if (pcf->flags & PCF50633_F_USB_PRESENT)
++			pcf->pdata->cb(&pcf->client.dev,
++			       PCF50633_FEAT_MBC, PMU_EVT_CHARGER_ACTIVE);
++		break;
++	}
++
++set_it:
+ 	reg_set_bit_mask(pcf, PCF50633_REG_MBCC7, PCF56033_MBCC7_USB_MASK,
+ 			 bits);
++
++	/* clear batfull */
++	reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
++				PCF50633_MBCC1_AUTORES,
++				0);
++	reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
++				PCF50633_MBCC1_RESUME,
++				PCF50633_MBCC1_RESUME);
++	reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
++				PCF50633_MBCC1_AUTORES,
++				PCF50633_MBCC1_AUTORES);
++
+ }
+ EXPORT_SYMBOL_GPL(pcf50633_usb_curlim_set);
+ 
+@@ -1105,16 +1279,36 @@ static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, NULL);
+ void pcf50633_charge_enable(struct pcf50633_data *pcf, int on)
+ {
+ 	u_int8_t bits;
++	u_int8_t usblim;
+ 
+ 	if (!(pcf->pdata->used_features & PCF50633_FEAT_MBC))
+ 		return;
+ 
++	DEBUGPC("pcf50633_charge_enable %d\n", on);
++
+ 	if (on) {
+ 		pcf->flags |= PCF50633_F_CHG_ENABLED;
+ 		bits = PCF50633_MBCC1_CHGENA;
++		usblim = reg_read(pcf, PCF50633_REG_MBCC7) &
++							PCF56033_MBCC7_USB_MASK;
++		switch (usblim) {
++		case PCF50633_MBCC7_USB_1000mA:
++		case PCF50633_MBCC7_USB_500mA:
++			if (pcf->flags & PCF50633_F_USB_PRESENT)
++				if (pcf->pdata->cb)
++					pcf->pdata->cb(&pcf->client.dev,
++						       PCF50633_FEAT_MBC,
++						       PMU_EVT_CHARGER_ACTIVE);
++			break;
++		default:
++			break;
++		}
+ 	} else {
+ 		pcf->flags &= ~PCF50633_F_CHG_ENABLED;
+ 		bits = 0;
++		if (pcf->pdata->cb)
++			pcf->pdata->cb(&pcf->client.dev,
++				       PCF50633_FEAT_MBC, PMU_EVT_CHARGER_IDLE);
+ 	}
+ 	reg_set_bit_mask(pcf, PCF50633_REG_MBCC1, PCF50633_MBCC1_CHGENA,
+ 			 bits);
+@@ -1703,7 +1897,9 @@ static int pcf50633_detect(struct i2c_adapter *adapter, int address, int kind)
+ 
+ 	mutex_init(&data->lock);
+ 	mutex_init(&data->working_lock);
++	mutex_init(&data->working_lock_nobat);
+ 	INIT_WORK(&data->work, pcf50633_work);
++	INIT_WORK(&data->work_nobat, pcf50633_work_nobat);
+ 	data->irq = irq;
+ 	data->working = 0;
+ 	data->onkey_seconds = -1;
+diff --git a/include/linux/pcf506xx.h b/include/linux/pcf506xx.h
+index 33be73e..9069bd4 100644
+--- a/include/linux/pcf506xx.h
++++ b/include/linux/pcf506xx.h
+@@ -21,6 +21,8 @@ enum pmu_event {
+ 	PMU_EVT_USB_INSERT,
+ 	PMU_EVT_USB_REMOVE,
+ #endif
++	PMU_EVT_CHARGER_ACTIVE,
++	PMU_EVT_CHARGER_IDLE,
+ 	__NUM_PMU_EVTS
+ };
+ 
+-- 
+1.5.6.3
+