648 lines
15 KiB
C
648 lines
15 KiB
C
/*
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* linux/arch/arm/mach-s3c2442/mach-gta02.c
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*
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* S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
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*
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* Copyright (C) 2006-2009 by Openmoko, Inc.
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* Authors: Harald Welte <laforge@openmoko.org>
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* Andy Green <andy@openmoko.org>
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* Werner Almesberger <werner@openmoko.org>
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/workqueue.h>
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#include <linux/platform_device.h>
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#include <linux/serial_core.h>
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#include <linux/spi/spi.h>
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#include <linux/mmc/host.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/nand_ecc.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <linux/io.h>
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#include <linux/i2c.h>
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#include <linux/backlight.h>
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#include <linux/regulator/machine.h>
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#include <linux/mfd/pcf50633/core.h>
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#include <linux/mfd/pcf50633/mbc.h>
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#include <linux/mfd/pcf50633/adc.h>
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#include <linux/mfd/pcf50633/gpio.h>
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#include <linux/mfd/pcf50633/pmic.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <mach/regs-irq.h>
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#include <mach/regs-gpio.h>
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#include <mach/regs-gpioj.h>
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#include <mach/fb.h>
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#include <mach/spi.h>
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#include <mach/spi-gpio.h>
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#include <plat/usb-control.h>
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#include <mach/regs-mem.h>
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#include <mach/hardware.h>
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#include <mach/gta02.h>
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#include <plat/regs-serial.h>
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#include <plat/nand.h>
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#include <plat/devs.h>
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#include <plat/cpu.h>
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#include <plat/pm.h>
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#include <plat/udc.h>
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#include <plat/gpio-cfg.h>
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#include <plat/iic.h>
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static struct pcf50633 *gta02_pcf;
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/*
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* This gets called every 1ms when we paniced.
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*/
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static long gta02_panic_blink(long count)
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{
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long delay = 0;
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static long last_blink;
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static char led;
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/* Fast blink: 200ms period. */
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if (count - last_blink < 100)
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return 0;
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led ^= 1;
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gpio_direction_output(GTA02_GPIO_AUX_LED, led);
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last_blink = count;
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return delay;
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}
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static struct map_desc gta02_iodesc[] __initdata = {
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{
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.virtual = 0xe0000000,
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.pfn = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
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.length = SZ_1M,
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.type = MT_DEVICE
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},
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};
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#define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
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#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
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#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
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static struct s3c2410_uartcfg gta02_uartcfgs[] = {
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[0] = {
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.hwport = 0,
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.flags = 0,
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.ucon = UCON,
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.ulcon = ULCON,
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.ufcon = UFCON,
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},
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[1] = {
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.hwport = 1,
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.flags = 0,
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.ucon = UCON,
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.ulcon = ULCON,
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.ufcon = UFCON,
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},
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[2] = {
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.hwport = 2,
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.flags = 0,
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.ucon = UCON,
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.ulcon = ULCON,
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.ufcon = UFCON,
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},
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};
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#ifdef CONFIG_CHARGER_PCF50633
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/*
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* On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
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* We use this to recognize that we can pull 1A from the USB socket.
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*
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* These constants are the measured pcf50633 ADC levels with the 1A
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* charger / 48K resistor, and with no pulldown resistor.
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*/
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#define ADC_NOM_CHG_DETECT_1A 6
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#define ADC_NOM_CHG_DETECT_USB 43
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static void
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gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
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{
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int ma;
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/* Interpret charger type */
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if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
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/*
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* Sanity - stop GPO driving out now that we have a 1A charger
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* GPO controls USB Host power generation on GTA02
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*/
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pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
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ma = 1000;
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} else
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ma = 100;
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pcf50633_mbc_usb_curlim_set(pcf, ma);
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}
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static struct delayed_work gta02_charger_work;
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static int gta02_usb_vbus_draw;
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static void gta02_charger_worker(struct work_struct *work)
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{
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if (gta02_usb_vbus_draw) {
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pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
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return;
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}
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#ifdef CONFIG_PCF50633_ADC
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pcf50633_adc_async_read(gta02_pcf,
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PCF50633_ADCC1_MUX_ADCIN1,
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PCF50633_ADCC1_AVERAGE_16,
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gta02_configure_pmu_for_charger,
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NULL);
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#else
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/*
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* If the PCF50633 ADC is disabled we fallback to a
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* 100mA limit for safety.
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*/
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pcf50633_mbc_usb_curlim_set(pcf, 100);
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#endif
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}
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#define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
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static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
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{
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if (irq == PCF50633_IRQ_USBINS) {
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schedule_delayed_work(>a02_charger_work,
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GTA02_CHARGER_CONFIGURE_TIMEOUT);
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return;
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}
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if (irq == PCF50633_IRQ_USBREM) {
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cancel_delayed_work_sync(>a02_charger_work);
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gta02_usb_vbus_draw = 0;
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}
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}
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static void gta02_udc_vbus_draw(unsigned int ma)
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{
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if (!gta02_pcf)
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return;
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gta02_usb_vbus_draw = ma;
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schedule_delayed_work(>a02_charger_work,
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GTA02_CHARGER_CONFIGURE_TIMEOUT);
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}
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#else /* !CONFIG_CHARGER_PCF50633 */
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#define gta02_pmu_event_callback NULL
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#define gta02_udc_vbus_draw NULL
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#endif
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/*
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* This is called when pc50633 is probed, unfortunately quite late in the
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* day since it is an I2C bus device. Here we can belatedly define some
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* platform devices with the advantage that we can mark the pcf50633 as the
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* parent. This makes them get suspended and resumed with their parent
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* the pcf50633 still around.
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*/
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static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
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static char *gta02_batteries[] = {
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"battery",
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};
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struct pcf50633_platform_data gta02_pcf_pdata = {
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.resumers = {
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[0] = PCF50633_INT1_USBINS |
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PCF50633_INT1_USBREM |
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PCF50633_INT1_ALARM,
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[1] = PCF50633_INT2_ONKEYF,
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[2] = PCF50633_INT3_ONKEY1S,
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[3] = PCF50633_INT4_LOWSYS |
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PCF50633_INT4_LOWBAT |
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PCF50633_INT4_HIGHTMP,
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},
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.batteries = gta02_batteries,
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.num_batteries = ARRAY_SIZE(gta02_batteries),
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.charger_reference_current_ma = 1000,
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.reg_init_data = {
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[PCF50633_REGULATOR_AUTO] = {
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.constraints = {
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.min_uV = 3300000,
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.max_uV = 3300000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.always_on = 1,
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.apply_uV = 1,
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.state_mem = {
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.enabled = 1,
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},
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},
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},
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[PCF50633_REGULATOR_DOWN1] = {
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.constraints = {
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.min_uV = 1300000,
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.max_uV = 1600000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.always_on = 1,
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.apply_uV = 1,
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},
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},
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[PCF50633_REGULATOR_DOWN2] = {
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.constraints = {
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.min_uV = 1800000,
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.max_uV = 1800000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.apply_uV = 1,
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.always_on = 1,
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.state_mem = {
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.enabled = 1,
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},
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},
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},
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[PCF50633_REGULATOR_HCLDO] = {
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.constraints = {
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.min_uV = 2000000,
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.max_uV = 3300000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
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.always_on = 1,
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},
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},
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[PCF50633_REGULATOR_LDO1] = {
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.constraints = {
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.min_uV = 3300000,
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.max_uV = 3300000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.apply_uV = 1,
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.state_mem = {
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.enabled = 0,
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},
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},
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},
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[PCF50633_REGULATOR_LDO2] = {
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.constraints = {
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.min_uV = 3300000,
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.max_uV = 3300000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.apply_uV = 1,
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},
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},
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[PCF50633_REGULATOR_LDO3] = {
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.constraints = {
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.min_uV = 3000000,
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.max_uV = 3000000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.apply_uV = 1,
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},
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},
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[PCF50633_REGULATOR_LDO4] = {
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.constraints = {
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.min_uV = 3200000,
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.max_uV = 3200000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.apply_uV = 1,
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},
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},
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[PCF50633_REGULATOR_LDO5] = {
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.constraints = {
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.min_uV = 3000000,
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.max_uV = 3000000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.apply_uV = 1,
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.state_mem = {
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.enabled = 1,
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},
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},
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},
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[PCF50633_REGULATOR_LDO6] = {
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.constraints = {
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.min_uV = 3000000,
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.max_uV = 3000000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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},
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},
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[PCF50633_REGULATOR_MEMLDO] = {
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.constraints = {
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.min_uV = 1800000,
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.max_uV = 1800000,
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.valid_modes_mask = REGULATOR_MODE_NORMAL,
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.state_mem = {
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.enabled = 1,
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},
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},
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},
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},
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.probe_done = gta02_pmu_attach_child_devices,
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.mbc_event_callback = gta02_pmu_event_callback,
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};
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/* NOR Flash. */
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#define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
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#define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */
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static struct physmap_flash_data gta02_nor_flash_data = {
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.width = 2,
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};
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static struct resource gta02_nor_flash_resource = {
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.start = GTA02_FLASH_BASE,
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.end = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device gta02_nor_flash = {
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.name = "physmap-flash",
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.id = 0,
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.dev = {
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.platform_data = >a02_nor_flash_data,
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},
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.resource = >a02_nor_flash_resource,
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.num_resources = 1,
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};
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struct platform_device s3c24xx_pwm_device = {
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.name = "s3c24xx_pwm",
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.num_resources = 0,
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};
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static struct i2c_board_info gta02_i2c_devs[] __initdata = {
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{
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I2C_BOARD_INFO("pcf50633", 0x73),
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.irq = GTA02_IRQ_PCF50633,
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.platform_data = >a02_pcf_pdata,
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},
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{
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I2C_BOARD_INFO("wm8753", 0x1a),
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},
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};
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static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
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[0] = {
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/*
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* This name is also hard-coded in the boot loaders, so
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* changing it would would require all users to upgrade
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* their boot loaders, some of which are stored in a NOR
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* that is considered to be immutable.
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*/
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.name = "neo1973-nand",
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.nr_chips = 1,
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.flash_bbt = 1,
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},
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};
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/*
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* Choose a set of timings derived from S3C@2442B MCP54
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* data sheet (K5D2G13ACM-D075 MCP Memory).
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*/
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static struct s3c2410_platform_nand __initdata gta02_nand_info = {
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.tacls = 0,
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.twrph0 = 25,
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.twrph1 = 15,
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.nr_sets = ARRAY_SIZE(gta02_nand_sets),
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.sets = gta02_nand_sets,
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};
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static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
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{
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switch (cmd) {
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case S3C2410_UDC_P_ENABLE:
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pr_debug("%s S3C2410_UDC_P_ENABLE\n", __func__);
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gpio_direction_output(GTA02_GPIO_USB_PULLUP, 1);
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break;
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case S3C2410_UDC_P_DISABLE:
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pr_debug("%s S3C2410_UDC_P_DISABLE\n", __func__);
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gpio_direction_output(GTA02_GPIO_USB_PULLUP, 0);
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break;
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case S3C2410_UDC_P_RESET:
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pr_debug("%s S3C2410_UDC_P_RESET\n", __func__);
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/* FIXME: Do something here. */
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}
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}
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/* Get PMU to set USB current limit accordingly. */
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static struct s3c2410_udc_mach_info gta02_udc_cfg = {
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.vbus_draw = gta02_udc_vbus_draw,
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.udc_command = gta02_udc_command,
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};
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static void gta02_bl_set_intensity(int intensity)
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{
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struct pcf50633 *pcf = gta02_pcf;
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int old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
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/* We map 8-bit intensity to 6-bit intensity in hardware. */
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intensity >>= 2;
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/*
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* This can happen during, eg, print of panic on blanked console,
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* but we can't service i2c without interrupts active, so abort.
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*/
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if (in_atomic()) {
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printk(KERN_ERR "gta02_bl_set_intensity called while atomic\n");
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return;
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}
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old_intensity = pcf50633_reg_read(pcf, PCF50633_REG_LEDOUT);
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if (intensity == old_intensity)
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return;
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/* We can't do this anywhere else. */
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pcf50633_reg_write(pcf, PCF50633_REG_LEDDIM, 5);
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if (!(pcf50633_reg_read(pcf, PCF50633_REG_LEDENA) & 3))
|
|
old_intensity = 0;
|
|
|
|
/*
|
|
* The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
|
|
* if seen, you have to re-enable the LED unit.
|
|
*/
|
|
if (!intensity || !old_intensity)
|
|
pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 0);
|
|
|
|
/* Illegal to set LEDOUT to 0. */
|
|
if (!intensity)
|
|
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f, 2);
|
|
else
|
|
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_LEDOUT, 0x3f,
|
|
intensity);
|
|
|
|
if (intensity)
|
|
pcf50633_reg_write(pcf, PCF50633_REG_LEDENA, 2);
|
|
|
|
}
|
|
|
|
static struct generic_bl_info gta02_bl_info = {
|
|
.name = "gta02-bl",
|
|
.max_intensity = 0xff,
|
|
.default_intensity = 0xff,
|
|
.set_bl_intensity = gta02_bl_set_intensity,
|
|
};
|
|
|
|
static struct platform_device gta02_bl_dev = {
|
|
.name = "generic-bl",
|
|
.id = 1,
|
|
.dev = {
|
|
.platform_data = >a02_bl_info,
|
|
},
|
|
};
|
|
|
|
|
|
|
|
/* USB */
|
|
static struct s3c2410_hcd_info gta02_usb_info __initdata = {
|
|
.port[0] = {
|
|
.flags = S3C_HCDFLG_USED,
|
|
},
|
|
.port[1] = {
|
|
.flags = 0,
|
|
},
|
|
};
|
|
|
|
|
|
static void __init gta02_map_io(void)
|
|
{
|
|
s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
|
|
s3c24xx_init_clocks(12000000);
|
|
s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
|
|
}
|
|
|
|
|
|
/* These are the guys that don't need to be children of PMU. */
|
|
|
|
static struct platform_device *gta02_devices[] __initdata = {
|
|
&s3c_device_ohci,
|
|
&s3c_device_wdt,
|
|
&s3c_device_sdi,
|
|
&s3c_device_usbgadget,
|
|
&s3c_device_nand,
|
|
>a02_nor_flash,
|
|
&s3c24xx_pwm_device,
|
|
&s3c_device_iis,
|
|
&s3c_device_i2c0,
|
|
};
|
|
|
|
/* These guys DO need to be children of PMU. */
|
|
|
|
static struct platform_device *gta02_devices_pmu_children[] = {
|
|
>a02_bl_dev,
|
|
};
|
|
|
|
|
|
/*
|
|
* This is called when pc50633 is probed, quite late in the day since it is an
|
|
* I2C bus device. Here we can define platform devices with the advantage that
|
|
* we can mark the pcf50633 as the parent. This makes them get suspended and
|
|
* resumed with their parent the pcf50633 still around. All devices whose
|
|
* operation depends on something from pcf50633 must have this relationship
|
|
* made explicit like this, or suspend and resume will become an unreliable
|
|
* hellworld.
|
|
*/
|
|
|
|
static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
|
|
{
|
|
int n;
|
|
|
|
/* Grab a copy of the now probed PMU pointer. */
|
|
gta02_pcf = pcf;
|
|
|
|
for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
|
|
gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
|
|
|
|
platform_add_devices(gta02_devices_pmu_children,
|
|
ARRAY_SIZE(gta02_devices_pmu_children));
|
|
}
|
|
|
|
static void gta02_poweroff(void)
|
|
{
|
|
pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
|
|
}
|
|
|
|
static void __init gta02_machine_init(void)
|
|
{
|
|
/* Set the panic callback to make AUX LED blink at ~5Hz. */
|
|
panic_blink = gta02_panic_blink;
|
|
|
|
s3c_pm_init();
|
|
|
|
#ifdef CONFIG_CHARGER_PCF50633
|
|
INIT_DELAYED_WORK(>a02_charger_work, gta02_charger_worker);
|
|
#endif
|
|
|
|
s3c24xx_udc_set_platdata(>a02_udc_cfg);
|
|
s3c_ohci_set_platdata(>a02_usb_info);
|
|
s3c_nand_set_platdata(>a02_nand_info);
|
|
s3c_i2c0_set_platdata(NULL);
|
|
|
|
i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
|
|
|
|
platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
|
|
pm_power_off = gta02_poweroff;
|
|
}
|
|
|
|
|
|
MACHINE_START(NEO1973_GTA02, "GTA02")
|
|
/* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
|
|
.phys_io = S3C2410_PA_UART,
|
|
.io_pg_offst = (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
|
|
.boot_params = S3C2410_SDRAM_PA + 0x100,
|
|
.map_io = gta02_map_io,
|
|
.init_irq = s3c24xx_init_irq,
|
|
.init_machine = gta02_machine_init,
|
|
.timer = &s3c24xx_timer,
|
|
MACHINE_END
|