ff17905d7c
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12546 a1c6a512-1295-4272-9138-f99709370657
146 lines
4.6 KiB
C
146 lines
4.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 by Linus Nielsen Feltzing
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "kernel.h"
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#include "pcf50606.h"
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#include "button-target.h"
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#include "logf.h"
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/* Used by the bootloader to find out what caused the device to start */
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unsigned char pcf50606_intregs[3];
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static bool usb_ch_enabled = false;
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/* These voltages were determined by measuring the output of the PCF50606
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on a running H300, and verified by disassembling the original firmware */
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static void set_voltages(void)
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{
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static const unsigned char buf[5] =
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{
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0xf4, /* IOREGC = 2.9V, ON in all states */
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0xef, /* D1REGC = 2.4V, ON in all states */
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0x18, /* D2REGC = 3.3V, OFF in all states */
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0xf0, /* D3REGC = 2.5V, ON in all states */
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0xef, /* LPREGC1 = 2.4V, ON in all states */
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};
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pcf50606_write_multiple(0x23, buf, 5);
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}
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static void init_pmu_interrupts(void)
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{
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/* inital data is interrupt masks */
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unsigned char data[3] =
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{
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~0x00,
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~0x00,
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~0x06, /* unmask ACDREM, ACDINS */
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};
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/* make sure GPI6 interrupt is off before unmasking anything */
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and_l(~0x0f000000, &INTPRI5); /* INT38 - Priority 0 (Off) */
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/* unmask the PMU interrupts we want to service */
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pcf50606_write_multiple(0x05, data, 3);
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/* clear INT1-3 as these are left set after standby */
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pcf50606_read_multiple(0x02, pcf50606_intregs, 3);
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/* Set to read pcf50606 INT but keep GPI6 off until init completes */
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and_l(~0x00000040, &GPIO_ENABLE);
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or_l(0x00000040, &GPIO_FUNCTION);
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or_l(0x00004000, &GPIO_INT_EN); /* GPI6 H-L */
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}
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static inline void enable_pmu_interrupts(void)
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{
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/* clear pending GPI6 interrupts first or it may miss the first
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H-L transition */
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or_l(0x00004000, &GPIO_INT_CLEAR);
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or_l(0x03000000, &INTPRI5); /* INT38 - Priority 3 */
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}
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/* enables/disables USB charging
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* ATTENTION: make sure to set the irq level
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* to highest before calling this function! */
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void pcf50606_set_usb_charging(bool on)
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{
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/* USB charging is controlled by GPOOD0:
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High-Z: Charge enable
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Pulled down: Charge disable
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*/
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if (on)
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pcf50606_write(0x39, 0x00);
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else
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pcf50606_write(0x39, 0x07);
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usb_ch_enabled = on;
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logf("pcf50606_set_usb_charging(%s)\n", on ? "on" : "off" );
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}
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bool pcf50606_usb_charging_enabled(void)
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{
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/* TODO: read the state of the GPOOD2 register... */
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return usb_ch_enabled;
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}
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void pcf50606_init(void)
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{
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pcf50606_i2c_init();
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/* initialize pmu interrupts but don't service them yet */
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init_pmu_interrupts();
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set_voltages();
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pcf50606_write(0x08, 0x60); /* Wake on USB and charger insertion */
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pcf50606_write(0x09, 0x05); /* USB and ON key debounce: 14ms */
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pcf50606_write(0x29, 0x1C); /* Disable the unused MBC module */
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pcf50606_set_usb_charging(false); /* Disable USB charging atm. */
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pcf50606_write(0x35, 0x13); /* Backlight PWM = 512Hz 50/50 */
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pcf50606_write(0x3a, 0x3b); /* PWM output on GPOOD1 */
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pcf50606_write(0x33, 0x8c); /* Accessory detect: ACDAPE=1, THRSHLD=2.20V */
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enable_pmu_interrupts(); /* allow GPI6 interrupts from PMU now */
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}
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/* PMU interrupt */
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void GPI6(void) __attribute__ ((interrupt_handler));
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void GPI6(void)
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{
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unsigned char data[3]; /* 0 = INT1, 1 = INT2, 2 = INT3 */
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/* Clear pending GPI6 interrupts */
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or_l(0x00004000, &GPIO_INT_CLEAR);
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/* clear pending interrupts from pcf50606 */
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pcf50606_read_multiple(0x02, data, 3);
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if (data[2] & 0x06)
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{
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/* ACDINS/ACDREM */
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/* Check if the button driver should actually scan main buttons or not
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- bias towards "yes" out of paranoia. */
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button_enable_scan((data[2] & 0x02) != 0 ||
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(pcf50606_read(0x33) & 0x01) != 0);
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}
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}
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