OSHW-DEIMOS/SOFTWARE/A64-TERES/linux-a64/drivers/arisc/interfaces/arisc_axp.c

/*
 *  drivers/arisc/interfaces/arisc_axp.c
 *
 * Copyright (c) 2012 Allwinner.
 * 2012-05-01 Written by sunny (sunny@allwinnertech.com).
 * 2012-10-01 Written by superm (superm@allwinnertech.com).
 *
 * 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.  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "../arisc_i.h"

/* nmi isr node, record current nmi interrupt handler and argument */
nmi_isr_t nmi_isr_node[2];
EXPORT_SYMBOL(nmi_isr_node);

/**
 * register call-back function, call-back function is for arisc notify some event to ac327,
 * axp/rtc interrupt for external interrupt NMI.
 * @type:  nmi type, pmu/rtc;
 * @func:  call-back function;
 * @para:  parameter for call-back function;
 *
 * @return: result, 0 - register call-back function successed;
 *                 !0 - register call-back function failed;
 * NOTE: the function is like "int callback(void *para)";
 *       this function will execute in system ISR.
 */
int arisc_nmi_cb_register(u32 type, arisc_cb_t func, void *para)
{
	if (nmi_isr_node[type].handler) {
		if(func == nmi_isr_node[type].handler) {
			ARISC_WRN("nmi interrupt handler register already\n");
			return 0;
		}
		/* just output warning message, overlay handler */
		ARISC_WRN("nmi interrupt handler register already\n");
		return -EINVAL;
	}
	nmi_isr_node[type].handler = func;
	nmi_isr_node[type].arg     = para;

	return 0;
}
EXPORT_SYMBOL(arisc_nmi_cb_register);


/**
 * unregister call-back function.
 * @type:  nmi type, pmu/rtc;
 * @func:  call-back function which need be unregister;
 */
void arisc_nmi_cb_unregister(u32 type, arisc_cb_t func)
{
	if ((nmi_isr_node[type].handler) != (func)) {
		/* invalid handler */
		ARISC_WRN("invalid handler for unreg\n\n");
		return ;
	}
	nmi_isr_node[type].handler = NULL;
	nmi_isr_node[type].arg     = NULL;
}
EXPORT_SYMBOL(arisc_nmi_cb_unregister);

int arisc_disable_nmi_irq(void)
{
	int                   result;

	/* send message use hwmsgbox */
	result = invoke_scp_fn_smc(ARM_SVC_ARISC_AXP_DISABLE_IRQ, 0, 0, 0);

	return result;
}
EXPORT_SYMBOL(arisc_disable_nmi_irq);

int arisc_enable_nmi_irq(void)
{
	int result;

	/* send message use hwmsgbox */
	result = invoke_scp_fn_smc(ARM_SVC_ARISC_AXP_ENABLE_IRQ, 0, 0, 0);

	return result;
}
EXPORT_SYMBOL(arisc_enable_nmi_irq);

int arisc_clear_nmi_status(void)
{
	int result;

	/* send message use hwmsgbox */
	result = invoke_scp_fn_smc(ARM_SVC_ARISC_CLR_NMI_STATUS, 0, 0, 0);

	return result;
}
EXPORT_SYMBOL(arisc_clear_nmi_status);

int arisc_set_nmi_trigger(u32 type)
{
	int result;

	/* send message use hwmsgbox */
	result = invoke_scp_fn_smc(ARM_SVC_ARISC_SET_NMI_TRIGGER, type, 0, 0);

	return result;
}
EXPORT_SYMBOL(arisc_set_nmi_trigger);

int arisc_axp_get_chip_id(unsigned char *chip_id)
{
	int result;

	/* FIXME: if the runtime sever enable the mmu & dcache,
	 * should not use flush cache here.
	 */
	result = invoke_scp_fn_smc(ARM_SVC_ARISC_AXP_GET_CHIP_ID, virt_to_phys(chip_id), 0, 0);

	return result;
}
EXPORT_SYMBOL(arisc_axp_get_chip_id);

int arisc_set_led_bln(u32 led_rgb, u32 led_onms, u32 led_offms, u32 led_darkms)
{
	int result;
	u32 paras[22];

	paras[0] = led_rgb;
	paras[1] = led_onms;
	paras[2] = led_offms;
	paras[3] = led_darkms;

	/* FIXME: if the runtime sever enable the mmu & dcache,
	 * should not use flush cache here.
	 */
	result = invoke_scp_fn_smc(ARM_SVC_ARISC_SET_LED_BLN, virt_to_phys(paras), 0, 0);

	return result;

}
EXPORT_SYMBOL(arisc_set_led_bln);

#if (defined CONFIG_ARCH_SUN8IW5P1) || (defined CONFIG_ARCH_SUN50IW1P1)
int arisc_adjust_pmu_chgcur(unsigned int max_chgcur, unsigned int chg_ic_temp)
{
	int result;

	result = invoke_scp_fn_smc(ARM_SVC_ARISC_AXP_SET_PARAS, max_chgcur, chg_ic_temp, 1);

	return result;
}
EXPORT_SYMBOL(arisc_adjust_pmu_chgcur);
#endif

int arisc_set_pwr_tree(u32 *pwr_tree)
{
	int result;

	result = invoke_scp_fn_smc(ARM_SVC_ARISC_SET_PWR_TREE, virt_to_phys(pwr_tree), 0, 0);

	return result;
}
EXPORT_SYMBOL(arisc_set_pwr_tree);


int arisc_axp_int_notify(u32 type)
{
	u32 ret = 0;

	if (type & NMI_INT_TYPE_PMU_OFFSET) {
		/* call pmu interrupt handler */
		if (nmi_isr_node[NMI_INT_TYPE_PMU].handler == NULL) {
			ARISC_WRN("pmu irq handler not install\n");
			return 1;
		}

		ARISC_INF("call pmu interrupt handler\n");
		ret |= (*(nmi_isr_node[NMI_INT_TYPE_PMU].handler))(nmi_isr_node[NMI_INT_TYPE_PMU].arg);
	}
	if (type & NMI_INT_TYPE_RTC_OFFSET)
	{
		/* call rtc interrupt handler */
		if (nmi_isr_node[NMI_INT_TYPE_RTC].handler == NULL) {
			ARISC_WRN("rtc irq handler not install\n");
			return 1;
		}

		ARISC_INF("call rtc interrupt handler\n");
		ret |= (*(nmi_isr_node[NMI_INT_TYPE_RTC].handler))(nmi_isr_node[NMI_INT_TYPE_RTC].arg);
	}

	return ret;
}

int arisc_pmu_set_voltage(u32 type, u32 voltage)
{
	int result;

	result = invoke_scp_fn_smc(ARM_SVC_ARISC_SET_PMU_VOLT, type, voltage, 0);

	return result;
}
EXPORT_SYMBOL(arisc_pmu_set_voltage);

unsigned int arisc_pmu_get_voltage(u32 type)
{
	u32 voltage;

	invoke_scp_fn_smc(ARM_SVC_ARISC_GET_PMU_VOLT, type, virt_to_phys(&voltage), 0);

	return voltage;
}
EXPORT_SYMBOL(arisc_pmu_get_voltage);