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-rw-r--r--arch/arm/mach-s3c24xx/pm.c149
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diff --git a/arch/arm/mach-s3c24xx/pm.c b/arch/arm/mach-s3c24xx/pm.c
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+/* linux/arch/arm/plat-s3c24xx/pm.c
+ *
+ * Copyright (c) 2004-2006 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX Power Manager (Suspend-To-RAM) support
+ *
+ * See Documentation/arm/Samsung-S3C24XX/Suspend.txt for more information
+ *
+ * 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
+ *
+ * Parts based on arch/arm/mach-pxa/pm.c
+ *
+ * Thanks to Dimitry Andric for debugging
+*/
+
+#include <linux/init.h>
+#include <linux/suspend.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+
+#include <plat/regs-serial.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-gpio.h>
+#include <mach/regs-mem.h>
+#include <mach/regs-irq.h>
+
+#include <asm/mach/time.h>
+
+#include <plat/gpio-cfg.h>
+#include <plat/pm.h>
+
+#define PFX "s3c24xx-pm: "
+
+static struct sleep_save core_save[] = {
+ SAVE_ITEM(S3C2410_LOCKTIME),
+ SAVE_ITEM(S3C2410_CLKCON),
+
+ /* we restore the timings here, with the proviso that the board
+ * brings the system up in an slower, or equal frequency setting
+ * to the original system.
+ *
+ * if we cannot guarantee this, then things are going to go very
+ * wrong here, as we modify the refresh and both pll settings.
+ */
+
+ SAVE_ITEM(S3C2410_BWSCON),
+ SAVE_ITEM(S3C2410_BANKCON0),
+ SAVE_ITEM(S3C2410_BANKCON1),
+ SAVE_ITEM(S3C2410_BANKCON2),
+ SAVE_ITEM(S3C2410_BANKCON3),
+ SAVE_ITEM(S3C2410_BANKCON4),
+ SAVE_ITEM(S3C2410_BANKCON5),
+
+#ifndef CONFIG_CPU_FREQ
+ SAVE_ITEM(S3C2410_CLKDIVN),
+ SAVE_ITEM(S3C2410_MPLLCON),
+ SAVE_ITEM(S3C2410_REFRESH),
+#endif
+ SAVE_ITEM(S3C2410_UPLLCON),
+ SAVE_ITEM(S3C2410_CLKSLOW),
+};
+
+static struct sleep_save misc_save[] = {
+ SAVE_ITEM(S3C2410_DCLKCON),
+};
+
+/* s3c_pm_check_resume_pin
+ *
+ * check to see if the pin is configured correctly for sleep mode, and
+ * make any necessary adjustments if it is not
+*/
+
+static void s3c_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
+{
+ unsigned long irqstate;
+ unsigned long pinstate;
+ int irq = gpio_to_irq(pin);
+
+ if (irqoffs < 4)
+ irqstate = s3c_irqwake_intmask & (1L<<irqoffs);
+ else
+ irqstate = s3c_irqwake_eintmask & (1L<<irqoffs);
+
+ pinstate = s3c_gpio_getcfg(pin);
+
+ if (!irqstate) {
+ if (pinstate == S3C2410_GPIO_IRQ)
+ S3C_PMDBG("Leaving IRQ %d (pin %d) as is\n", irq, pin);
+ } else {
+ if (pinstate == S3C2410_GPIO_IRQ) {
+ S3C_PMDBG("Disabling IRQ %d (pin %d)\n", irq, pin);
+ s3c_gpio_cfgpin(pin, S3C2410_GPIO_INPUT);
+ }
+ }
+}
+
+/* s3c_pm_configure_extint
+ *
+ * configure all external interrupt pins
+*/
+
+void s3c_pm_configure_extint(void)
+{
+ int pin;
+
+ /* for each of the external interrupts (EINT0..EINT15) we
+ * need to check wether it is an external interrupt source,
+ * and then configure it as an input if it is not
+ */
+
+ for (pin = S3C2410_GPF(0); pin <= S3C2410_GPF(7); pin++) {
+ s3c_pm_check_resume_pin(pin, pin - S3C2410_GPF(0));
+ }
+
+ for (pin = S3C2410_GPG(0); pin <= S3C2410_GPG(7); pin++) {
+ s3c_pm_check_resume_pin(pin, (pin - S3C2410_GPG(0))+8);
+ }
+}
+
+
+void s3c_pm_restore_core(void)
+{
+ s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
+ s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
+}
+
+void s3c_pm_save_core(void)
+{
+ s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
+ s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
+}
+