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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2014 Cástor Muñoz
* Code based on openiBoot project
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdint.h>
#include "config.h"
#include "system.h"
#include "panic.h"
#include "gpio-s5l8702.h"
int rec_hw_ver;
static uint32_t gpio_data[] =
{
#if defined(IPOD_6G)
0x5322222F, 0xEEEEEE00, 0x2332EEEE, 0x3333E222,
0x33333333, 0x33333333, 0x3F000E33, 0xEEEEEEEE,
0xEEEEEEEE, 0xEEEEEEEE, 0xE0EEEEEE, 0xEE00EE0E,
0xEEEE0EEE, 0xEEEEEEEE, 0xEE2222EE, 0xEEEE0EEE,
#elif defined(IPOD_NANO3G)
0xE322222F, 0xEEEEEE00, 0x2332EEEE, 0x3333E222,
0xEEE33333, 0x3EE0EEEE, 0x0F00EE33, 0xEEEEEEE0,
0x22222222, 0x22222222, 0x33322222, 0xEEEEEEEE,
0xEEEEEEEE, 0xEEEEEEEE, 0xEE2222EE, 0xEEEE0EEE,
#elif defined(IPOD_NANO4G)
0x3202EEEE, 0xE0EE2253, 0x2223EEEE, 0x33333332,
0xFF333E33, 0xE0FEE200, 0x2222222E, 0x22222222,
0xEEEEEEE2, 0xEEE0EEEE, 0x2EEEEEEE, 0xEEEE0222,
0xEEEEE00E, 0xEEEEEEEE, 0xEEEEEEEE,
#endif
};
void INIT_ATTR gpio_preinit(void)
{
for (int i = 0; i < GPIO_N_GROUPS; i++) {
PCON(i) = gpio_data[i];
PUNB(i) = 0;
PUNC(i) = 0;
}
#if defined(IPOD_NANO4G)
PUNB(0) = 0x20;
PUNC(1) = 0x40;
GPIOUNK388 = (GPIOUNK388 & ~3) | 1;
#endif
}
void INIT_ATTR gpio_init(void)
{
#ifdef IPOD_6G
/* Capture hardware versions:
*
* HW version 1 includes an amplifier for the jack plug
* microphone, it is activated configuring GPIO E7 as output
* high. It is posible to detect capture HW version (even
* when HP are not plugged) reading GPIO E7:
*
* Ver GPIO E7 models capture support
* --- ------- ------ ---------------
* 0 1 80/160fat dock line-in
* 1 0 120/160slim dock line-in + jack mic
*/
GPIOCMD = 0xe0700;
udelay(10000);
rec_hw_ver = (PDAT(14) & (1 << 7)) ? 0 : 1;
GPIOCMD = 0xe070e; /* restore default configuration */
if (rec_hw_ver == 0) {
GPIOCMD = 0xe060e;
}
else {
/* GPIO E6 is connected to mikey IRQ line (active low),
configure it as pull-up input */
GPIOCMD = 0xe0600;
PUNB(14) |= (1 << 6);
}
#elif defined(IPOD_NANO3G)
rec_hw_ver = 0;
#endif
}
#if 0
uint32_t gpio_group_get(int group)
{
uint32_t pcon = PCON(group);
uint32_t pdat = PDAT(group);
uint32_t group_cfg = 0;
int i;
for (i = 0; i < 8; i++) {
int pin_cfg = pcon & 0xF;
if (pin_cfg == 1) /* output */
pin_cfg = 0xE | ((pdat >> i) & 1);
group_cfg = (group_cfg >> 4) | (pin_cfg << 28);
pcon >>= 4;
}
return group_cfg;
}
void gpio_group_set(int group, uint32_t mask, uint32_t cfg)
{
PCON(group) = (PCON(group) & ~mask) | (cfg & mask);
}
#endif
/*
* eINT API
*/
#ifndef EINT_MAX_HANDLERS
#define EINT_MAX_HANDLERS 1
#endif
static struct eic_handler* l_handlers[EINT_MAX_HANDLERS] IDATA_ATTR;
void INIT_ATTR eint_init(void)
{
/* disable and clear external interrupts */
for (int i = 0; i < EIC_N_GROUPS; i++) {
EIC_INTEN(i) = 0;
EIC_INTLEVEL(i) = 0;
EIC_INTTYPE(i) = 0;
EIC_INTSTAT(i) = ~0;
}
}
void eint_register(struct eic_handler *h)
{
int i;
int flags = disable_irq_save();
for (i = 0; i < EINT_MAX_HANDLERS; i++) {
if (!l_handlers[i]) {
int group = EIC_GROUP(h->gpio_n);
int index = EIC_INDEX(h->gpio_n);
EIC_INTTYPE(group) |= (h->type << index);
EIC_INTLEVEL(group) |= (h->level << index);
EIC_INTSTAT(group) = (1 << index); /* clear */
EIC_INTEN(group) |= (1 << index); /* enable */
/* XXX: valid only for gpio_n = 0..127 (IRQ_EXT0..IRQ_EXT3) */
VIC0INTENABLE = 1 << (IRQ_EXT0 + (h->gpio_n >> 5));
l_handlers[i] = h;
break;
}
}
restore_irq(flags);
if (i == EINT_MAX_HANDLERS)
panicf("%s(): too many handlers!", __func__);
}
void eint_unregister(struct eic_handler *h)
{
int flags = disable_irq_save();
for (int i = 0; i < EINT_MAX_HANDLERS; i++) {
if (l_handlers[i] == h) {
int group = EIC_GROUP(h->gpio_n);
int index = EIC_INDEX(h->gpio_n);
EIC_INTEN(group) &= ~(1 << index); /* disable */
/* XXX: valid only for gpio_n = 0..127 (IRQ_EXT0..IRQ_EXT3) */
if (EIC_INTEN(group) == 0)
VIC0INTENCLEAR = 1 << (IRQ_EXT0 + (h->gpio_n >> 5));
l_handlers[i] = NULL;
break;
}
}
restore_irq(flags);
}
/* ISR */
static void ICODE_ATTR eint_handler(int group)
{
int i;
uint32_t ints;
ints = EIC_INTSTAT(group) & EIC_INTEN(group);
for (i = 0; i < EINT_MAX_HANDLERS; i++) {
struct eic_handler *h = l_handlers[i];
if (!h || (EIC_GROUP(h->gpio_n) != group))
continue;
uint32_t bit = 1 << EIC_INDEX(h->gpio_n);
if (ints & bit) {
/* Clear INTTYPE_EDGE interrupt, to clear INTTYPE_LEVEL
interrupts the source (line level) must be "cleared" */
if (h->type == EIC_INTTYPE_EDGE)
EIC_INTSTAT(group) = bit; /* clear */
if (h->autoflip)
EIC_INTLEVEL(group) ^= bit; /* swap level */
if (h->isr)
h->isr(h); /* exec app handler */
}
}
}
void ICODE_ATTR INT_EXT0(void)
{
eint_handler(6);
}
void ICODE_ATTR INT_EXT1(void)
{
eint_handler(5);
}
void ICODE_ATTR INT_EXT2(void)
{
eint_handler(4);
}
void ICODE_ATTR INT_EXT3(void)
{
eint_handler(3);
}
void ICODE_ATTR INT_EXT6(void)
{
eint_handler(0);
}
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