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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Linus Nielsen Feltzing
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "system.h"
#include "kernel.h"
#include "pcf50606.h"
#include "button-target.h"
#include "logf.h"
/* Used by the bootloader to find out what caused the device to start */
unsigned char pcf50606_intregs[3];
static bool usb_ch_enabled = false;
/* These voltages were determined by measuring the output of the PCF50606
on a running H300, and verified by disassembling the original firmware */
static void set_voltages(void)
{
static const unsigned char buf[5] =
{
0xf4, /* IOREGC = 2.9V, ON in all states */
0xef, /* D1REGC = 2.4V, ON in all states */
0x18, /* D2REGC = 3.3V, OFF in all states */
0xf0, /* D3REGC = 2.5V, ON in all states */
0xef, /* LPREGC1 = 2.4V, ON in all states */
};
pcf50606_write_multiple(0x23, buf, 5);
}
static void init_pmu_interrupts(void)
{
/* inital data is interrupt masks */
unsigned char data[3] =
{
~0x00,
~0x00,
~0x06, /* unmask ACDREM, ACDINS */
};
/* make sure GPI6 interrupt is off before unmasking anything */
and_l(~0x0f000000, &INTPRI5); /* INT38 - Priority 0 (Off) */
/* unmask the PMU interrupts we want to service */
pcf50606_write_multiple(0x05, data, 3);
/* clear INT1-3 as these are left set after standby */
pcf50606_read_multiple(0x02, pcf50606_intregs, 3);
/* Set to read pcf50606 INT but keep GPI6 off until init completes */
and_l(~0x00000040, &GPIO_ENABLE);
or_l(0x00000040, &GPIO_FUNCTION);
or_l(0x00004000, &GPIO_INT_EN); /* GPI6 H-L */
}
static inline void enable_pmu_interrupts(void)
{
/* clear pending GPI6 interrupts first or it may miss the first
H-L transition */
or_l(0x00004000, &GPIO_INT_CLEAR);
or_l(0x03000000, &INTPRI5); /* INT38 - Priority 3 */
}
/* enables/disables USB charging
* ATTENTION: make sure to set the irq level
* to highest before calling this function! */
void pcf50606_set_usb_charging(bool on)
{
/* USB charging is controlled by GPOOD0:
High-Z: Charge enable
Pulled down: Charge disable
*/
if (on)
pcf50606_write(0x39, 0x00);
else
pcf50606_write(0x39, 0x07);
usb_ch_enabled = on;
logf("pcf50606_set_usb_charging(%s)\n", on ? "on" : "off" );
}
bool pcf50606_usb_charging_enabled(void)
{
/* TODO: read the state of the GPOOD2 register... */
return usb_ch_enabled;
}
void pcf50606_init(void)
{
pcf50606_i2c_init();
/* initialize pmu interrupts but don't service them yet */
init_pmu_interrupts();
set_voltages();
pcf50606_write(0x08, 0x60); /* Wake on USB and charger insertion */
pcf50606_write(0x09, 0x05); /* USB and ON key debounce: 14ms */
pcf50606_write(0x29, 0x1C); /* Disable the unused MBC module */
pcf50606_set_usb_charging(false); /* Disable USB charging atm. */
pcf50606_write(0x35, 0x13); /* Backlight PWM = 512Hz 50/50 */
pcf50606_write(0x3a, 0x3b); /* PWM output on GPOOD1 */
pcf50606_write(0x33, 0x8c); /* Accessory detect: ACDAPE=1, THRSHLD=2.20V */
enable_pmu_interrupts(); /* allow GPI6 interrupts from PMU now */
}
/* PMU interrupt */
void GPI6(void) __attribute__ ((interrupt_handler));
void GPI6(void)
{
unsigned char data[3]; /* 0 = INT1, 1 = INT2, 2 = INT3 */
/* Clear pending GPI6 interrupts */
or_l(0x00004000, &GPIO_INT_CLEAR);
/* clear pending interrupts from pcf50606 */
pcf50606_read_multiple(0x02, data, 3);
if (data[2] & 0x06)
{
/* ACDINS/ACDREM */
/* Check if the button driver should actually scan main buttons or not
- bias towards "yes" out of paranoia. */
button_enable_scan((data[2] & 0x02) != 0 ||
(pcf50606_read(0x33) & 0x01) != 0);
}
}
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