Merge branch 'tk_prm_chain_handler_devel_3.3' of git://git.pwsan.com/linux-2.6 into prcm

endif

# PRCM

obj-y					+= prm_common.o

obj-$(CONFIG_ARCH_OMAP2)		+= prcm.o cm2xxx_3xxx.o prm2xxx_3xxx.o

obj-$(CONFIG_ARCH_OMAP3)		+= prcm.o cm2xxx_3xxx.o prm2xxx_3xxx.o \

					   vc3xxx_data.o vp3xxx_data.o

obj-$(CONFIG_ARCH_OMAP4)		+= prcm.o cm2xxx_3xxx.o cminst44xx.o \

					   cm44xx.o prcm_mpu44xx.o \

					   prminst44xx.o vc44xx_data.o \

					   vp44xx_data.o

					   vp44xx_data.o prm44xx.o

# OMAP voltage domains

voltagedomain-common			:= voltage.o vc.o vp.o

#include <linux/debugfs.h>

#include <linux/seq_file.h>

#include <linux/uaccess.h>

#include <linux/irq.h>

#include <linux/interrupt.h>

#include <asm/system.h>

#include "control.h"

#include "mux.h"

#include "prm.h"

#define OMAP_MUX_BASE_OFFSET		0x30	/* Offset from CTRL_BASE */

#define OMAP_MUX_BASE_SZ		0x5ca

		pad->idle = bpad->idle;

		pad->off = bpad->off;

		if (pad->flags & OMAP_DEVICE_PAD_REMUX)

		if (pad->flags &

		    (OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP))

			nr_pads_dynamic++;

		pr_debug("%s: Initialized %s\n", __func__, pad->name);

	for (i = 0; i < hmux->nr_pads; i++) {

		struct omap_device_pad *pad = &hmux->pads[i];

		if (pad->flags & OMAP_DEVICE_PAD_REMUX) {

		if (pad->flags &

		    (OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP)) {

			pr_debug("%s: pad %s tagged dynamic\n",

					__func__, pad->name);

			hmux->pads_dynamic[nr_pads_dynamic] = pad;

	return NULL;

}

/**

 * omap_hwmod_mux_scan_wakeups - omap hwmod scan wakeup pads

 * @hmux: Pads for a hwmod

 * @mpu_irqs: MPU irq array for a hwmod

 *

 * Scans the wakeup status of pads for a single hwmod.  If an irq

 * array is defined for this mux, the parser will call the registered

 * ISRs for corresponding pads, otherwise the parser will stop at the

 * first wakeup active pad and return.  Returns true if there is a

 * pending and non-served wakeup event for the mux, otherwise false.

 */

static bool omap_hwmod_mux_scan_wakeups(struct omap_hwmod_mux_info *hmux,

		struct omap_hwmod_irq_info *mpu_irqs)

{

	int i, irq;

	unsigned int val;

	u32 handled_irqs = 0;

	for (i = 0; i < hmux->nr_pads_dynamic; i++) {

		struct omap_device_pad *pad = hmux->pads_dynamic[i];

		if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP) ||

		    !(pad->idle & OMAP_WAKEUP_EN))

			continue;

		val = omap_mux_read(pad->partition, pad->mux->reg_offset);

		if (!(val & OMAP_WAKEUP_EVENT))

			continue;

		if (!hmux->irqs)

			return true;

		irq = hmux->irqs[i];

		/* make sure we only handle each irq once */

		if (handled_irqs & 1 << irq)

			continue;

		handled_irqs |= 1 << irq;

		generic_handle_irq(mpu_irqs[irq].irq);

	}

	return false;

}

/**

 * _omap_hwmod_mux_handle_irq - Process wakeup events for a single hwmod

 *

 * Checks a single hwmod for every wakeup capable pad to see if there is an

 * active wakeup event. If this is the case, call the corresponding ISR.

 */

static int _omap_hwmod_mux_handle_irq(struct omap_hwmod *oh, void *data)

{

	if (!oh->mux || !oh->mux->enabled)

		return 0;

	if (omap_hwmod_mux_scan_wakeups(oh->mux, oh->mpu_irqs))

		generic_handle_irq(oh->mpu_irqs[0].irq);

	return 0;

}

/**

 * omap_hwmod_mux_handle_irq - Process pad wakeup irqs.

 *

 * Calls a function for each registered omap_hwmod to check

 * pad wakeup statuses.

 */

static irqreturn_t omap_hwmod_mux_handle_irq(int irq, void *unused)

{

	omap_hwmod_for_each(_omap_hwmod_mux_handle_irq, NULL);

	return IRQ_HANDLED;

}

/* Assumes the calling function takes care of locking */

void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)

{

static int __init omap_mux_late_init(void)

{

	struct omap_mux_partition *partition;

	int ret;

	list_for_each_entry(partition, &mux_partitions, node) {

		struct omap_mux_entry *e, *tmp;

		}

	}

	ret = request_irq(omap_prcm_event_to_irq("io"),

		omap_hwmod_mux_handle_irq, IRQF_SHARED | IRQF_NO_SUSPEND,

			"hwmod_io", omap_mux_late_init);

	if (ret)

		pr_warning("mux: Failed to setup hwmod io irq %d\n", ret);

	omap_mux_dbg_init();

	return 0;

#include <linux/list.h>

#include <linux/mutex.h>

#include <linux/spinlock.h>

#include <linux/slab.h>

#include "common.h"

#include <plat/cpu.h>

	return 0;

}

/**

 * _set_idle_ioring_wakeup - enable/disable IO pad wakeup on hwmod idle for mux

 * @oh: struct omap_hwmod *

 * @set_wake: bool value indicating to set (true) or clear (false) wakeup enable

 *

 * Set or clear the I/O pad wakeup flag in the mux entries for the

 * hwmod @oh.  This function changes the @oh->mux->pads_dynamic array

 * in memory.  If the hwmod is currently idled, and the new idle

 * values don't match the previous ones, this function will also

 * update the SCM PADCTRL registers.  Otherwise, if the hwmod is not

 * currently idled, this function won't touch the hardware: the new

 * mux settings are written to the SCM PADCTRL registers when the

 * hwmod is idled.  No return value.

 */

static void _set_idle_ioring_wakeup(struct omap_hwmod *oh, bool set_wake)

{

	struct omap_device_pad *pad;

	bool change = false;

	u16 prev_idle;

	int j;

	if (!oh->mux || !oh->mux->enabled)

		return;

	for (j = 0; j < oh->mux->nr_pads_dynamic; j++) {

		pad = oh->mux->pads_dynamic[j];

		if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP))

			continue;

		prev_idle = pad->idle;

		if (set_wake)

			pad->idle |= OMAP_WAKEUP_EN;

		else

			pad->idle &= ~OMAP_WAKEUP_EN;

		if (prev_idle != pad->idle)

			change = true;

	}

	if (change && oh->_state == _HWMOD_STATE_IDLE)

		omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE);

}

/**

 * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware

 * @oh: struct omap_hwmod *

	v = oh->_sysc_cache;

	_enable_wakeup(oh, &v);

	_write_sysconfig(v, oh);

	_set_idle_ioring_wakeup(oh, true);

	spin_unlock_irqrestore(&oh->_lock, flags);

	return 0;

	v = oh->_sysc_cache;

	_disable_wakeup(oh, &v);

	_write_sysconfig(v, oh);

	_set_idle_ioring_wakeup(oh, false);

	spin_unlock_irqrestore(&oh->_lock, flags);

	return 0;

	return 0;

}

/**

 * omap_hwmod_pad_route_irq - route an I/O pad wakeup to a particular MPU IRQ

 * @oh: struct omap_hwmod * containing hwmod mux entries

 * @pad_idx: array index in oh->mux of the hwmod mux entry to route wakeup

 * @irq_idx: the hwmod mpu_irqs array index of the IRQ to trigger on wakeup

 *

 * When an I/O pad wakeup arrives for the dynamic or wakeup hwmod mux

 * entry number @pad_idx for the hwmod @oh, trigger the interrupt

 * service routine for the hwmod's mpu_irqs array index @irq_idx.  If

 * this function is not called for a given pad_idx, then the ISR

 * associated with @oh's first MPU IRQ will be triggered when an I/O

 * pad wakeup occurs on that pad.  Note that @pad_idx is the index of

 * the _dynamic or wakeup_ entry: if there are other entries not

 * marked with OMAP_DEVICE_PAD_WAKEUP or OMAP_DEVICE_PAD_REMUX, these

 * entries are NOT COUNTED in the dynamic pad index.  This function

 * must be called separately for each pad that requires its interrupt

 * to be re-routed this way.  Returns -EINVAL if there is an argument

 * problem or if @oh does not have hwmod mux entries or MPU IRQs;

 * returns -ENOMEM if memory cannot be allocated; or 0 upon success.

 *

 * XXX This function interface is fragile.  Rather than using array

 * indexes, which are subject to unpredictable change, it should be

 * using hwmod IRQ names, and some other stable key for the hwmod mux

 * pad records.

 */

int omap_hwmod_pad_route_irq(struct omap_hwmod *oh, int pad_idx, int irq_idx)

{

	int nr_irqs;

	might_sleep();

	if (!oh || !oh->mux || !oh->mpu_irqs || pad_idx < 0 ||

	    pad_idx >= oh->mux->nr_pads_dynamic)

		return -EINVAL;

	/* Check the number of available mpu_irqs */

	for (nr_irqs = 0; oh->mpu_irqs[nr_irqs].irq >= 0; nr_irqs++)

		;

	if (irq_idx >= nr_irqs)

		return -EINVAL;

	if (!oh->mux->irqs) {

		/* XXX What frees this? */

		oh->mux->irqs = kzalloc(sizeof(int) * oh->mux->nr_pads_dynamic,

			GFP_KERNEL);

		if (!oh->mux->irqs)

			return -ENOMEM;

	}

	oh->mux->irqs[pad_idx] = irq_idx;

	return 0;

}

 * that any peripheral wake-up events occurring while attempting to

 * clear the PM_WKST_x are detected and cleared.

 */

static int prcm_clear_mod_irqs(s16 module, u8 regs)

static int prcm_clear_mod_irqs(s16 module, u8 regs, u32 ignore_bits)

{

	u32 wkst, fclk, iclk, clken;

	u16 wkst_off = (regs == 3) ? OMAP3430ES2_PM_WKST3 : PM_WKST1;

	wkst = omap2_prm_read_mod_reg(module, wkst_off);

	wkst &= omap2_prm_read_mod_reg(module, grpsel_off);

	wkst &= ~ignore_bits;

	if (wkst) {

		iclk = omap2_cm_read_mod_reg(module, iclk_off);

		fclk = omap2_cm_read_mod_reg(module, fclk_off);

			omap2_cm_set_mod_reg_bits(clken, module, fclk_off);

			omap2_prm_write_mod_reg(wkst, module, wkst_off);

			wkst = omap2_prm_read_mod_reg(module, wkst_off);

			wkst &= ~ignore_bits;

			c++;

		}

		omap2_cm_write_mod_reg(iclk, module, iclk_off);

	return c;

}

static int _prcm_int_handle_wakeup(void)

static irqreturn_t _prcm_int_handle_io(int irq, void *unused)

{

	int c;

	c = prcm_clear_mod_irqs(WKUP_MOD, 1);

	c += prcm_clear_mod_irqs(CORE_MOD, 1);

	c += prcm_clear_mod_irqs(OMAP3430_PER_MOD, 1);

	if (omap_rev() > OMAP3430_REV_ES1_0) {

		c += prcm_clear_mod_irqs(CORE_MOD, 3);

		c += prcm_clear_mod_irqs(OMAP3430ES2_USBHOST_MOD, 1);

	}

	c = prcm_clear_mod_irqs(WKUP_MOD, 1,

		~(OMAP3430_ST_IO_MASK | OMAP3430_ST_IO_CHAIN_MASK));

	return c;

	return c ? IRQ_HANDLED : IRQ_NONE;

}

/*

 * PRCM Interrupt Handler

 *

 * The PRM_IRQSTATUS_MPU register indicates if there are any pending

 * interrupts from the PRCM for the MPU. These bits must be cleared in

 * order to clear the PRCM interrupt. The PRCM interrupt handler is

 * implemented to simply clear the PRM_IRQSTATUS_MPU in order to clear

 * the PRCM interrupt. Please note that bit 0 of the PRM_IRQSTATUS_MPU

 * register indicates that a wake-up event is pending for the MPU and

 * this bit can only be cleared if the all the wake-up events latched

 * in the various PM_WKST_x registers have been cleared. The interrupt

 * handler is implemented using a do-while loop so that if a wake-up

 * event occurred during the processing of the prcm interrupt handler

 * (setting a bit in the corresponding PM_WKST_x register and thus

 * preventing us from clearing bit 0 of the PRM_IRQSTATUS_MPU register)

 * this would be handled.

 */

static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)

static irqreturn_t _prcm_int_handle_wakeup(int irq, void *unused)

{

	u32 irqenable_mpu, irqstatus_mpu;

	int c = 0;

	irqenable_mpu = omap2_prm_read_mod_reg(OCP_MOD,

					 OMAP3_PRM_IRQENABLE_MPU_OFFSET);

	irqstatus_mpu = omap2_prm_read_mod_reg(OCP_MOD,

					 OMAP3_PRM_IRQSTATUS_MPU_OFFSET);

	irqstatus_mpu &= irqenable_mpu;

	do {

		if (irqstatus_mpu & (OMAP3430_WKUP_ST_MASK |

				     OMAP3430_IO_ST_MASK)) {

			c = _prcm_int_handle_wakeup();

	int c;

	/*

			 * Is the MPU PRCM interrupt handler racing with the

			 * IVA2 PRCM interrupt handler ?

	 * Clear all except ST_IO and ST_IO_CHAIN for wkup module,

	 * these are handled in a separate handler to avoid acking

	 * IO events before parsing in mux code

	 */

			WARN(c == 0, "prcm: WARNING: PRCM indicated MPU wakeup "

			     "but no wakeup sources are marked\n");

		} else {

			/* XXX we need to expand our PRCM interrupt handler */

			WARN(1, "prcm: WARNING: PRCM interrupt received, but "

			     "no code to handle it (%08x)\n", irqstatus_mpu);

	c = prcm_clear_mod_irqs(WKUP_MOD, 1,

		OMAP3430_ST_IO_MASK | OMAP3430_ST_IO_CHAIN_MASK);

	c += prcm_clear_mod_irqs(CORE_MOD, 1, 0);

	c += prcm_clear_mod_irqs(OMAP3430_PER_MOD, 1, 0);

	if (omap_rev() > OMAP3430_REV_ES1_0) {

		c += prcm_clear_mod_irqs(CORE_MOD, 3, 0);

		c += prcm_clear_mod_irqs(OMAP3430ES2_USBHOST_MOD, 1, 0);

	}

		omap2_prm_write_mod_reg(irqstatus_mpu, OCP_MOD,

					OMAP3_PRM_IRQSTATUS_MPU_OFFSET);

		irqstatus_mpu = omap2_prm_read_mod_reg(OCP_MOD,

					OMAP3_PRM_IRQSTATUS_MPU_OFFSET);

		irqstatus_mpu &= irqenable_mpu;

	} while (irqstatus_mpu);

	return IRQ_HANDLED;

	return c ? IRQ_HANDLED : IRQ_NONE;

}

static void omap34xx_save_context(u32 *save)

	disable_hlt();

	suspend_state = state;

	omap_uart_enable_irqs(0);

	omap_prcm_irq_prepare();

	return 0;

}

	return;

}

static void omap3_pm_finish(void)

{

	omap_prcm_irq_complete();

}

static const struct platform_suspend_ops omap_pm_ops = {

	.begin		= omap3_pm_begin,

	.end		= omap3_pm_end,

	.enter		= omap3_pm_enter,

	.finish		= omap3_pm_finish,

	.valid		= suspend_valid_only_mem,

};

#endif /* CONFIG_SUSPEND */

			  OMAP3430_GRPSEL_GPT1_MASK |

			  OMAP3430_GRPSEL_GPT12_MASK,

			  WKUP_MOD, OMAP3430_PM_MPUGRPSEL);

	/* For some reason IO doesn't generate wakeup event even if

	 * it is selected to mpu wakeup goup */

	omap2_prm_write_mod_reg(OMAP3430_IO_EN_MASK | OMAP3430_WKUP_EN_MASK,

			  OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);

	/* Enable PM_WKEN to support DSS LPR */

	omap2_prm_write_mod_reg(OMAP3430_PM_WKEN_DSS_EN_DSS_MASK,

	 * supervised mode for powerdomains */

	prcm_setup_regs();

	ret = request_irq(INT_34XX_PRCM_MPU_IRQ,

			  (irq_handler_t)prcm_interrupt_handler,

			  IRQF_DISABLED, "prcm", NULL);

	ret = request_irq(omap_prcm_event_to_irq("wkup"),

		_prcm_int_handle_wakeup, IRQF_NO_SUSPEND, "pm_wkup", NULL);

	if (ret) {

		pr_err("pm: Failed to request pm_wkup irq\n");

		goto err1;

	}

	/* IO interrupt is shared with mux code */

	ret = request_irq(omap_prcm_event_to_irq("io"),

		_prcm_int_handle_io, IRQF_SHARED | IRQF_NO_SUSPEND, "pm_io",

		omap3_pm_init);

	if (ret) {

		printk(KERN_ERR "request_irq failed to register for 0x%x\n",

		       INT_34XX_PRCM_MPU_IRQ);

		pr_err("pm: Failed to request pm_io irq\n");

		goto err1;

	}

/*

 * OMAP2/3 PRCM base and module definitions

 *

 * Copyright (C) 2007-2009 Texas Instruments, Inc.

 * Copyright (C) 2007-2009, 2011 Texas Instruments, Inc.

 * Copyright (C) 2007-2009 Nokia Corporation

 *

 * Written by Paul Walmsley

extern void __iomem *prm_base;

extern void __iomem *cm_base;

extern void __iomem *cm2_base;

/**

 * struct omap_prcm_irq - describes a PRCM interrupt bit

 * @name: a short name describing the interrupt type, e.g. "wkup" or "io"

 * @offset: the bit shift of the interrupt inside the IRQ{ENABLE,STATUS} regs

 * @priority: should this interrupt be handled before @priority=false IRQs?

 *

 * Describes interrupt bits inside the PRM_IRQ{ENABLE,STATUS}_MPU* registers.

 * On systems with multiple PRM MPU IRQ registers, the bitfields read from

 * the registers are concatenated, so @offset could be > 31 on these systems -

 * see omap_prm_irq_handler() for more details.  I/O ring interrupts should

 * have @priority set to true.

 */

struct omap_prcm_irq {

	const char *name;

	unsigned int offset;

	bool priority;

};

/**

 * struct omap_prcm_irq_setup - PRCM interrupt controller details

 * @ack: PRM register offset for the first PRM_IRQSTATUS_MPU register

 * @mask: PRM register offset for the first PRM_IRQENABLE_MPU register

 * @nr_regs: number of PRM_IRQ{STATUS,ENABLE}_MPU* registers

 * @nr_irqs: number of entries in the @irqs array

 * @irqs: ptr to an array of PRCM interrupt bits (see @nr_irqs)

 * @irq: MPU IRQ asserted when a PRCM interrupt arrives

 * @read_pending_irqs: fn ptr to determine if any PRCM IRQs are pending

 * @ocp_barrier: fn ptr to force buffered PRM writes to complete

 * @save_and_clear_irqen: fn ptr to save and clear IRQENABLE regs

 * @restore_irqen: fn ptr to save and clear IRQENABLE regs

 * @saved_mask: IRQENABLE regs are saved here during suspend

 * @priority_mask: 1 bit per IRQ, set to 1 if omap_prcm_irq.priority = true

 * @base_irq: base dynamic IRQ number, returned from irq_alloc_descs() in init

 * @suspended: set to true after Linux suspend code has called our ->prepare()

 * @suspend_save_flag: set to true after IRQ masks have been saved and disabled

 *

 * @saved_mask, @priority_mask, @base_irq, @suspended, and

 * @suspend_save_flag are populated dynamically, and are not to be

 * specified in static initializers.

 */

struct omap_prcm_irq_setup {

	u16 ack;

	u16 mask;

	u8 nr_regs;

	u8 nr_irqs;

	const struct omap_prcm_irq *irqs;

	int irq;

	void (*read_pending_irqs)(unsigned long *events);

	void (*ocp_barrier)(void);

	void (*save_and_clear_irqen)(u32 *saved_mask);

	void (*restore_irqen)(u32 *saved_mask);

	u32 *saved_mask;

	u32 *priority_mask;

	int base_irq;

	bool suspended;

	bool suspend_save_flag;

};

/* OMAP_PRCM_IRQ: convenience macro for creating struct omap_prcm_irq records */

#define OMAP_PRCM_IRQ(_name, _offset, _priority) {	\

	.name = _name,					\

	.offset = _offset,				\

	.priority = _priority				\

	}

extern void omap_prcm_irq_cleanup(void);

extern int omap_prcm_register_chain_handler(

	struct omap_prcm_irq_setup *irq_setup);

extern int omap_prcm_event_to_irq(const char *event);

extern void omap_prcm_irq_prepare(void);

extern void omap_prcm_irq_complete(void);

# endif

#endif