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kernel-fxtec-pro1x/arch/arm/mach-s3c2440/mach-gta02.c
TAMUKI Shoichi c7ff0d9c92 panic: keep blinking in spite of long spin timer mode 
To keep panic_timeout accuracy when running under a hypervisor, the
current implementation only spins on long time (1 second) calls to mdelay.
 That brings a good effect, but the problem is the keyboard LEDs don't
blink at all on that situation.

This patch changes to call to panic_blink_enter() between every mdelay and
keeps blinking in spite of long spin timer mode.

The time to call to mdelay is now 100ms.  Even this change will keep
panic_timeout accuracy enough when running under a hypervisor.

Signed-off-by: TAMUKI Shoichi <tamuki@linet.gr.jp>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-11 08:59:22 -07:00

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/*
* linux/arch/arm/mach-s3c2442/mach-gta02.c
*
* 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.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#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.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/spi/spi.h>
#include <linux/mmc/host.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/mbc.h>
#include <linux/mfd/pcf50633/adc.h>
#include <linux/mfd/pcf50633/gpio.h>
#include <linux/mfd/pcf50633/pmic.h>
#include <linux/mfd/pcf50633/backlight.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <mach/regs-irq.h>
#include <mach/regs-gpio.h>
#include <mach/regs-gpioj.h>
#include <mach/fb.h>
#include <mach/spi.h>
#include <mach/spi-gpio.h>
#include <plat/usb-control.h>
#include <mach/regs-mem.h>
#include <mach/hardware.h>
#include <mach/gta02.h>
#include <plat/regs-serial.h>
#include <plat/nand.h>
#include <plat/devs.h>
#include <plat/cpu.h>
#include <plat/pm.h>
#include <plat/udc.h>
#include <plat/gpio-cfg.h>
#include <plat/iic.h>
static struct pcf50633 *gta02_pcf;
/*
* This gets called frequently when we paniced.
*/
static long gta02_panic_blink(int state)
{
long delay = 0;
char led;
led = (state) ? 1 : 0;
gpio_direction_output(GTA02_GPIO_AUX_LED, led);
return delay;
}
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
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);
}
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(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
/*
* This is called when pc50633 is probed, unfortunately quite late in the
* day since it is an I2C bus device. Here we can belatedly define some
* 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.
*/
static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
static char *gta02_batteries[] = {
"battery",
};
static struct pcf50633_bl_platform_data gta02_backlight_data = {
.default_brightness = 0x3f,
.default_brightness_limit = 0,
.ramp_time = 5,
};
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,
.state_mem = {
.enabled = 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,
.state_mem = {
.enabled = 1,
},
},
},
[PCF50633_REGULATOR_HCLDO] = {
.constraints = {
.min_uV = 2000000,
.max_uV = 3300000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
.always_on = 1,
},
},
[PCF50633_REGULATOR_LDO1] = {
.constraints = {
.min_uV = 3300000,
.max_uV = 3300000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.apply_uV = 1,
.state_mem = {
.enabled = 0,
},
},
},
[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,
.apply_uV = 1,
},
},
[PCF50633_REGULATOR_LDO5] = {
.constraints = {
.min_uV = 3000000,
.max_uV = 3000000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
.apply_uV = 1,
.state_mem = {
.enabled = 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,
.state_mem = {
.enabled = 1,
},
},
},
},
.probe_done = gta02_pmu_attach_child_devices,
.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 = {
.start = GTA02_FLASH_BASE,
.end = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
.flags = IORESOURCE_MEM,
};
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,
};
struct platform_device s3c24xx_pwm_device = {
.name = "s3c24xx_pwm",
.num_resources = 0,
};
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,
};
static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
{
switch (cmd) {
case S3C2410_UDC_P_ENABLE:
pr_debug("%s S3C2410_UDC_P_ENABLE\n", __func__);
gpio_direction_output(GTA02_GPIO_USB_PULLUP, 1);
break;
case S3C2410_UDC_P_DISABLE:
pr_debug("%s S3C2410_UDC_P_DISABLE\n", __func__);
gpio_direction_output(GTA02_GPIO_USB_PULLUP, 0);
break;
case S3C2410_UDC_P_RESET:
pr_debug("%s S3C2410_UDC_P_RESET\n", __func__);
/* FIXME: Do something here. */
}
}
/* Get PMU to set USB current limit accordingly. */
static struct s3c2410_udc_mach_info gta02_udc_cfg = {
.vbus_draw = gta02_udc_vbus_draw,
.udc_command = gta02_udc_command,
};
/* 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,
&gta02_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[] = {
};
/*
* 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 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);
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));
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
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