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linux/arch/arm/mach-s3c/mach-gta02.c
Jason Wang 9664efeb5b ARM: s3c: delete unneed local variable "delay" 
"delay" variable on line 79 can be deleted by returning "0" on line 88.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210624055627.22295-1-wangborong@cdjrlc.com
Link: https://lore.kernel.org/r/20210818204422.17919-1-krzysztof.kozlowski@canonical.com'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-08-19 23:40:09 +02:00

580 lines
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// SPDX-License-Identifier: GPL-2.0+
//
// S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
//
// Copyright (C) 2006-2009 by Openmoko, Inc.
// Authors: Harald Welte <laforge@openmoko.org>
// Andy Green <andy@openmoko.org>
// Werner Almesberger <werner@openmoko.org>
// All rights reserved.
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/gpio/machine.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/serial_s3c.h>
#include <linux/input.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/mmc/host.h>
#include <linux/mfd/pcf50633/adc.h>
#include <linux/mfd/pcf50633/backlight.h>
#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/gpio.h>
#include <linux/mfd/pcf50633/mbc.h>
#include <linux/mfd/pcf50633/pmic.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/rawnand.h>
#include <linux/mtd/nand-ecc-sw-hamming.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/regulator/machine.h>
#include <linux/spi/spi.h>
#include <linux/spi/s3c24xx.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <linux/platform_data/i2c-s3c2410.h>
#include <linux/platform_data/mtd-nand-s3c2410.h>
#include <linux/platform_data/touchscreen-s3c2410.h>
#include <linux/platform_data/usb-ohci-s3c2410.h>
#include <linux/platform_data/usb-s3c2410_udc.h>
#include <linux/platform_data/fb-s3c2410.h>
#include "regs-gpio.h"
#include "regs-irq.h"
#include "gpio-samsung.h"
#include "cpu.h"
#include "devs.h"
#include "gpio-cfg.h"
#include "pm.h"
#include "s3c24xx.h"
#include "gta02.h"
static struct pcf50633 *gta02_pcf;
/*
* This gets called frequently when we paniced.
*/
static long gta02_panic_blink(int state)
{
char led;
led = (state) ? 1 : 0;
gpio_direction_output(GTA02_GPIO_AUX_LED, led);
return 0;
}
static struct map_desc gta02_iodesc[] __initdata = {
{
.virtual = 0xe0000000,
.pfn = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
.length = SZ_1M,
.type = MT_DEVICE
},
};
#define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
static struct s3c2410_uartcfg gta02_uartcfgs[] = {
[0] = {
.hwport = 0,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
[1] = {
.hwport = 1,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
[2] = {
.hwport = 2,
.flags = 0,
.ucon = UCON,
.ulcon = ULCON,
.ufcon = UFCON,
},
};
#ifdef CONFIG_CHARGER_PCF50633
/*
* On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
* We use this to recognize that we can pull 1A from the USB socket.
*
* These constants are the measured pcf50633 ADC levels with the 1A
* charger / 48K resistor, and with no pulldown resistor.
*/
#define ADC_NOM_CHG_DETECT_1A 6
#define ADC_NOM_CHG_DETECT_USB 43
#ifdef CONFIG_PCF50633_ADC
static void
gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
{
int ma;
/* Interpret charger type */
if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
/*
* Sanity - stop GPO driving out now that we have a 1A charger
* GPO controls USB Host power generation on GTA02
*/
pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
ma = 1000;
} else
ma = 100;
pcf50633_mbc_usb_curlim_set(pcf, ma);
}
#endif
static struct delayed_work gta02_charger_work;
static int gta02_usb_vbus_draw;
static void gta02_charger_worker(struct work_struct *work)
{
if (gta02_usb_vbus_draw) {
pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
return;
}
#ifdef CONFIG_PCF50633_ADC
pcf50633_adc_async_read(gta02_pcf,
PCF50633_ADCC1_MUX_ADCIN1,
PCF50633_ADCC1_AVERAGE_16,
gta02_configure_pmu_for_charger,
NULL);
#else
/*
* If the PCF50633 ADC is disabled we fallback to a
* 100mA limit for safety.
*/
pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
#endif
}
#define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
{
if (irq == PCF50633_IRQ_USBINS) {
schedule_delayed_work(&gta02_charger_work,
GTA02_CHARGER_CONFIGURE_TIMEOUT);
return;
}
if (irq == PCF50633_IRQ_USBREM) {
cancel_delayed_work_sync(&gta02_charger_work);
gta02_usb_vbus_draw = 0;
}
}
static void gta02_udc_vbus_draw(unsigned int ma)
{
if (!gta02_pcf)
return;
gta02_usb_vbus_draw = ma;
schedule_delayed_work(&gta02_charger_work,
GTA02_CHARGER_CONFIGURE_TIMEOUT);
}
#else /* !CONFIG_CHARGER_PCF50633 */
#define gta02_pmu_event_callback NULL
#define gta02_udc_vbus_draw NULL
#endif
static char *gta02_batteries[] = {
"battery",
};
static struct pcf50633_bl_platform_data gta02_backlight_data = {
.default_brightness = 0x3f,
.default_brightness_limit = 0,
.ramp_time = 5,
};
static struct pcf50633_platform_data gta02_pcf_pdata = {
.resumers = {
[0] = PCF50633_INT1_USBINS |
PCF50633_INT1_USBREM |
PCF50633_INT1_ALARM,
[1] = PCF50633_INT2_ONKEYF,
[2] = PCF50633_INT3_ONKEY1S,
[3] = PCF50633_INT4_LOWSYS |
PCF50633_INT4_LOWBAT |
PCF50633_INT4_HIGHTMP,
},
.batteries = gta02_batteries,
.num_batteries = ARRAY_SIZE(gta02_batteries),
.charger_reference_current_ma = 1000,
.backlight_data = &gta02_backlight_data,
.reg_init_data = {
[PCF50633_REGULATOR_AUTO] = {
.constraints = {
.min_uV = 3300000,
.max_uV = 3300000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.always_on = 1,
.apply_uV = 1,
},
},
[PCF50633_REGULATOR_DOWN1] = {
.constraints = {
.min_uV = 1300000,
.max_uV = 1600000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.always_on = 1,
.apply_uV = 1,
},
},
[PCF50633_REGULATOR_DOWN2] = {
.constraints = {
.min_uV = 1800000,
.max_uV = 1800000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.apply_uV = 1,
.always_on = 1,
},
},
[PCF50633_REGULATOR_HCLDO] = {
.constraints = {
.min_uV = 2000000,
.max_uV = 3300000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
REGULATOR_CHANGE_STATUS,
},
},
[PCF50633_REGULATOR_LDO1] = {
.constraints = {
.min_uV = 3300000,
.max_uV = 3300000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.valid_ops_mask = REGULATOR_CHANGE_STATUS,
.apply_uV = 1,
},
},
[PCF50633_REGULATOR_LDO2] = {
.constraints = {
.min_uV = 3300000,
.max_uV = 3300000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.apply_uV = 1,
},
},
[PCF50633_REGULATOR_LDO3] = {
.constraints = {
.min_uV = 3000000,
.max_uV = 3000000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.apply_uV = 1,
},
},
[PCF50633_REGULATOR_LDO4] = {
.constraints = {
.min_uV = 3200000,
.max_uV = 3200000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.valid_ops_mask = REGULATOR_CHANGE_STATUS,
.apply_uV = 1,
},
},
[PCF50633_REGULATOR_LDO5] = {
.constraints = {
.min_uV = 3000000,
.max_uV = 3000000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.valid_ops_mask = REGULATOR_CHANGE_STATUS,
.apply_uV = 1,
},
},
[PCF50633_REGULATOR_LDO6] = {
.constraints = {
.min_uV = 3000000,
.max_uV = 3000000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
},
},
[PCF50633_REGULATOR_MEMLDO] = {
.constraints = {
.min_uV = 1800000,
.max_uV = 1800000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
},
},
},
.mbc_event_callback = gta02_pmu_event_callback,
};
/* NOR Flash. */
#define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
#define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */
static struct physmap_flash_data gta02_nor_flash_data = {
.width = 2,
};
static struct resource gta02_nor_flash_resource =
DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
static struct platform_device gta02_nor_flash = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &gta02_nor_flash_data,
},
.resource = &gta02_nor_flash_resource,
.num_resources = 1,
};
static struct platform_device s3c24xx_pwm_device = {
.name = "s3c24xx_pwm",
.num_resources = 0,
};
static struct platform_device gta02_dfbmcs320_device = {
.name = "dfbmcs320",
};
static struct i2c_board_info gta02_i2c_devs[] __initdata = {
{
I2C_BOARD_INFO("pcf50633", 0x73),
.irq = GTA02_IRQ_PCF50633,
.platform_data = &gta02_pcf_pdata,
},
{
I2C_BOARD_INFO("wm8753", 0x1a),
},
};
static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
[0] = {
/*
* This name is also hard-coded in the boot loaders, so
* changing it would would require all users to upgrade
* their boot loaders, some of which are stored in a NOR
* that is considered to be immutable.
*/
.name = "neo1973-nand",
.nr_chips = 1,
.flash_bbt = 1,
},
};
/*
* Choose a set of timings derived from S3C@2442B MCP54
* data sheet (K5D2G13ACM-D075 MCP Memory).
*/
static struct s3c2410_platform_nand __initdata gta02_nand_info = {
.tacls = 0,
.twrph0 = 25,
.twrph1 = 15,
.nr_sets = ARRAY_SIZE(gta02_nand_sets),
.sets = gta02_nand_sets,
.engine_type = NAND_ECC_ENGINE_TYPE_SOFT,
};
/* Get PMU to set USB current limit accordingly. */
static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
.vbus_draw = gta02_udc_vbus_draw,
.pullup_pin = GTA02_GPIO_USB_PULLUP,
};
/* USB */
static struct s3c2410_hcd_info gta02_usb_info __initdata = {
.port[0] = {
.flags = S3C_HCDFLG_USED,
},
.port[1] = {
.flags = 0,
},
};
/* Touchscreen */
static struct s3c2410_ts_mach_info gta02_ts_info = {
.delay = 10000,
.presc = 0xff, /* slow as we can go */
.oversampling_shift = 2,
};
/* Buttons */
static struct gpio_keys_button gta02_buttons[] = {
{
.gpio = GTA02_GPIO_AUX_KEY,
.code = KEY_PHONE,
.desc = "Aux",
.type = EV_KEY,
.debounce_interval = 100,
},
{
.gpio = GTA02_GPIO_HOLD_KEY,
.code = KEY_PAUSE,
.desc = "Hold",
.type = EV_KEY,
.debounce_interval = 100,
},
};
static struct gpio_keys_platform_data gta02_buttons_pdata = {
.buttons = gta02_buttons,
.nbuttons = ARRAY_SIZE(gta02_buttons),
};
static struct platform_device gta02_buttons_device = {
.name = "gpio-keys",
.id = -1,
.dev = {
.platform_data = &gta02_buttons_pdata,
},
};
static struct gpiod_lookup_table gta02_audio_gpio_table = {
.dev_id = "neo1973-audio",
.table = {
GPIO_LOOKUP("GPIOJ", 2, "amp-shut", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("GPIOJ", 1, "hp", GPIO_ACTIVE_HIGH),
{ },
},
};
static struct platform_device gta02_audio = {
.name = "neo1973-audio",
.id = -1,
};
static struct gpiod_lookup_table gta02_mmc_gpio_table = {
.dev_id = "s3c2410-sdi",
.table = {
/* bus pins */
GPIO_LOOKUP_IDX("GPIOE", 5, "bus", 0, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("GPIOE", 6, "bus", 1, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("GPIOE", 7, "bus", 2, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("GPIOE", 8, "bus", 3, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("GPIOE", 9, "bus", 4, GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX("GPIOE", 10, "bus", 5, GPIO_ACTIVE_HIGH),
{ },
},
};
static void __init gta02_map_io(void)
{
s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
s3c24xx_set_timer_source(S3C24XX_PWM3, S3C24XX_PWM4);
}
/* 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,
&gta02_nor_flash,
&s3c24xx_pwm_device,
&s3c_device_iis,
&s3c_device_i2c0,
&gta02_dfbmcs320_device,
&gta02_buttons_device,
&s3c_device_adc,
&s3c_device_ts,
&gta02_audio,
};
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 turn AUX LED on or off. */
panic_blink = gta02_panic_blink;
s3c_pm_init();
#ifdef CONFIG_CHARGER_PCF50633
INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
#endif
s3c24xx_udc_set_platdata(&gta02_udc_cfg);
s3c24xx_ts_set_platdata(&gta02_ts_info);
s3c_ohci_set_platdata(&gta02_usb_info);
s3c_nand_set_platdata(&gta02_nand_info);
s3c_i2c0_set_platdata(NULL);
i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
/* Configure the I2S pins (GPE0...GPE4) in correct mode */
s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
S3C_GPIO_PULL_NONE);
gpiod_add_lookup_table(&gta02_audio_gpio_table);
gpiod_add_lookup_table(&gta02_mmc_gpio_table);
platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
pm_power_off = gta02_poweroff;
regulator_has_full_constraints();
}
static void __init gta02_init_time(void)
{
s3c2442_init_clocks(12000000);
s3c24xx_timer_init();
}
MACHINE_START(NEO1973_GTA02, "GTA02")
/* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
.atag_offset = 0x100,
.map_io = gta02_map_io,
.init_irq = s3c2442_init_irq,
.init_machine = gta02_machine_init,
.init_time = gta02_init_time,
MACHINE_END
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