/*
 * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
 * series of PDAs
 *
 * Copyright (c) 2004-2005 Richard Purdie
 *
 * Based on code written by Sharp for 2.4 kernels
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#undef DEBUG

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/apm-emulation.h>

#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/arch/pm.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/sharpsl.h>
#include "sharpsl.h"

struct battery_thresh spitz_battery_levels_acin[] = {
        { 213, 100},
        { 212,  98},
        { 211,  95},
        { 210,  93},
        { 209,  90},
        { 208,  88},
        { 207,  85},
        { 206,  83},
        { 205,  80},
        { 204,  78},
        { 203,  75},
        { 202,  73},
        { 201,  70},
        { 200,  68},
        { 199,  65},
        { 198,  63},
        { 197,  60},
        { 196,  58},
        { 195,  55},
        { 194,  53},
        { 193,  50},
        { 192,  48},
        { 192,  45},
        { 191,  43},
        { 191,  40},
        { 190,  38},
        { 190,  35},
        { 189,  33},
        { 188,  30},
        { 187,  28},
        { 186,  25},
        { 185,  23},
        { 184,  20},
        { 183,  18},
        { 182,  15},
        { 181,  13},
        { 180,  10},
        { 179,   8},
        { 178,   5},
        {   0,   0},
};

struct battery_thresh  spitz_battery_levels_noac[] = {
        { 213, 100},
        { 212,  98},
        { 211,  95},
        { 210,  93},
        { 209,  90},
        { 208,  88},
        { 207,  85},
        { 206,  83},
        { 205,  80},
        { 204,  78},
        { 203,  75},
        { 202,  73},
        { 201,  70},
        { 200,  68},
        { 199,  65},
        { 198,  63},
        { 197,  60},
        { 196,  58},
        { 195,  55},
        { 194,  53},
        { 193,  50},
        { 192,  48},
        { 191,  45},
        { 190,  43},
        { 189,  40},
        { 188,  38},
        { 187,  35},
        { 186,  33},
        { 185,  30},
        { 184,  28},
        { 183,  25},
        { 182,  23},
        { 181,  20},
        { 180,  18},
        { 179,  15},
        { 178,  13},
        { 177,  10},
        { 176,   8},
        { 175,   5},
        {   0,   0},
};

/* MAX1111 Commands */
#define MAXCTRL_PD0      1u << 0
#define MAXCTRL_PD1      1u << 1
#define MAXCTRL_SGL      1u << 2
#define MAXCTRL_UNI      1u << 3
#define MAXCTRL_SEL_SH   4
#define MAXCTRL_STR      1u << 7

/*
 * Read MAX1111 ADC
 */
int sharpsl_pm_pxa_read_max1111(int channel)
{
        if (machine_is_tosa()) // Ugly, better move this function into another module
            return 0;

        return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
                        | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
}

void sharpsl_pm_pxa_init(void)
{
        pxa_gpio_mode(sharpsl_pm.machinfo->gpio_acin | GPIO_IN);
        pxa_gpio_mode(sharpsl_pm.machinfo->gpio_batfull | GPIO_IN);
        pxa_gpio_mode(sharpsl_pm.machinfo->gpio_batlock | GPIO_IN);

        /* Register interrupt handlers */
        if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr, IRQF_DISABLED, "AC Input Detect", sharpsl_ac_isr)) {
                dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
        }
        else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin),IRQT_BOTHEDGE);

        if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED, "Battery Cover", sharpsl_fatal_isr)) {
                dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
        }
        else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock),IRQT_FALLING);

        if (sharpsl_pm.machinfo->gpio_fatal) {
                if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED, "Fatal Battery", sharpsl_fatal_isr)) {
                        dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
                }
                else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal),IRQT_FALLING);
        }

        if (sharpsl_pm.machinfo->batfull_irq)
        {
                /* Register interrupt handler. */
                if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED, "CO", sharpsl_chrg_full_isr)) {
                        dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
                }
                else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull),IRQT_RISING);
        }
}

void sharpsl_pm_pxa_remove(void)
{
        free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
        free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);

        if (sharpsl_pm.machinfo->gpio_fatal)
                free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);

        if (sharpsl_pm.machinfo->batfull_irq)
                free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
}