9e8fe0e4c6
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11396 a1c6a512-1295-4272-9138-f99709370657
136 lines
4.3 KiB
C
136 lines
4.3 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) 2006 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 "powermgmt.h"
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/* These voltages were determined by measuring the output of the PCF50606
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on a running X5, 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[4] =
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{
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0xf4, /* IOREGC = 2.9V, ON in all states */
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0xf0, /* D1REGC = 2.5V, ON in all states */
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0xf6, /* D2REGC = 3.1V, ON in all states */
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0xf4, /* D3REGC = 2.9V, ON in all states */
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};
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pcf50606_write_multiple(0x23, buf, 4);
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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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~0x04, /* unmask ONKEY1S */
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~0x00,
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~0x06, /* unmask ACDREM, ACDINS */
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};
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/* make sure GPI0 interrupt is off before unmasking anything */
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and_l(~0xf, &INTPRI5); /* INT32 - 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, data, 3);
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/* Set to read pcf50606 INT but keep GPI0 off until init completes */
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and_l(~0x00000001, &GPIO_ENABLE);
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or_l(0x00000001, &GPIO_FUNCTION);
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or_l(0x00000100, &GPIO_INT_EN); /* GPI0 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 GPI0 interrupts first or it may miss the first
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H-L transition */
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or_l(0x00000100, &GPIO_INT_CLEAR);
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or_l(0x3, &INTPRI5); /* INT32 - Priority 3 */
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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(0x39, 0x00); /* GPOOD0 = green led OFF */
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pcf50606_write(0x3a, 0x00); /* GPOOD1 = red led OFF */
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pcf50606_write(0x35, 0x11); /* Backlight PWM = 512Hz, 8/16, Active */
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#ifdef BOOTLOADER
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/* Backlight starts OFF in bootloader */
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pcf50606_write(0x38, 0x80); /* Backlight OFF, GPO1INV=1, GPO1ACT=011 */
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#else
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/* Keep backlight on when changing to firmware */
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pcf50606_write(0x38, 0xb0); /* Backlight ON, GPO1INV=1, GPO1ACT=011 */
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#endif
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/* Accessory detect */
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pcf50606_write(0x33, 0x8e); /* ACDAPE=1, THRSHLD=2.40V */
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/* allow GPI0 interrupts from PMU now */
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enable_pmu_interrupts();
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}
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void pcf50606_reset_timeout(void)
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{
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int level = set_irq_level(HIGHEST_IRQ_LEVEL);
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pcf50606_write(0x08, pcf50606_read(0x08) | 0x02); /* OOCC1 - TOTRST=1 */
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set_irq_level(level);
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}
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/* Handles interrupts generated by the pcf50606 */
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void GPI0(void) __attribute__ ((interrupt_handler, section(".text")));
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void GPI0(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 GPI0 interrupts */
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or_l(0x00000100, &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[0] & 0x04)
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{
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/* ONKEY1S */
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if (GPIO_READ & 0x02000000)
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sys_poweroff(); /* main ONKEY */
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else
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pcf50606_reset_timeout(); /* remote ONKEY */
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}
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if (data[2] & 0x06)
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{
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/* ACDINS/ACDREM */
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/* Check if main buttons should be actually be scanned 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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