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Add suspend/resume support for the Acer N30.
Index: linux-2.6.14/arch/arm/mach-s3c2410/mach-n30.c
===================================================================
--- linux-2.6.14.orig/arch/arm/mach-s3c2410/mach-n30.c
+++ linux-2.6.14/arch/arm/mach-s3c2410/mach-n30.c
@@ -66,11 +66,46 @@
#include "clock.h"
#include "devs.h"
#include "cpu.h"
+#include "pm.h"
static struct map_desc n30_iodesc[] __initdata = {
/* nothing here yet */
};
+/* This code is copied to physical address SDRAM_PA + 0x201000. The
+ * bootloader will jump there on a watchdog reset or when resuming
+ * from suspend to ram. */
+
+#define N30_RESUME_VA __va(S3C2410_SDRAM_PA + 0x201000)
+
+static void __init n30_resume(void) __attribute__((naked));
+static void __init n30_resume(void)
+{
+ asm(
+ "mov r1, #0x56000000 \n\t"
+
+ /* load GSTATUS2 and check for a wake from suspend */
+ "ldr r0, [r1, #0xb4] \n\t" /* GSTATUS2 */
+ "ands r0, r0, #2 \n\t" /* OFFRST */
+ "beq 1f \n\t"
+
+ /* it is a wake reset, so jump to the resume function
+ * pointed to by GSTATUS3 */
+ "ldr pc, [r1, #0xb8] \n\t" /* GSTATUS3 */
+
+ /* Probably a watchdog reset, so fake a power on reset
+ * by writing PWRST to GSTATUS2 and then jump back to
+ * the bootloader. */
+ "1: \n\t"
+ "mov r0, #1 \n\t" /* PWRST */
+ "str r0, [r1, #0xb4] \n\t" /* GSTATUS2 */
+ "mov pc, #0 \n\t"
+
+ "n30_resume_end: \n\t"
+ );
+}
+extern void n30_resume_end;
+
static struct s3c2410_uartcfg n30_uartcfgs[] = {
/* Normal serial port */
[0] = {
@@ -483,6 +518,154 @@ static void __init n30_hwinit(void)
__raw_writel(0x0000063f, S3C2410_GPHUP);
}
+void n30_pm_gpio(void)
+{
+ if (machine_is_n35()) {
+ /* Prepare for suspend to ram. This is what WinCE
+ * apparently does. I know where some of these pins
+ * are connected and ought to be moved to code related
+ * that hardware, but some stuff is magic so far. */
+
+ /* All this is magic. WinCE does this and it brings
+ * the power consumption in sleep mode down. */
+
+ /* Drive ADDR0, ADDR16..ADDR23, and ADDR26 low.
+ * ADDR24 and ADDR 25 are still working.
+ * nGCS1..nGCS5 are driven low.
+ * CLE, ALE, nFWE, nFRE, nRSTOUT and nFCW are working. */
+ __raw_writel(0x007e0600, S3C2410_GPACON);
+ __raw_writel(0x00000000, S3C2410_GPADAT);
+ __raw_writel(0x00015556, S3C2410_GPBCON);
+ __raw_writel(0x00000011, S3C2410_GPBDAT);
+ __raw_writel(0x000007ff, S3C2410_GPBUP);
+ __raw_writel(0xaa950618, S3C2410_GPCCON);
+ __raw_writel(0x0000024c, S3C2410_GPCDAT);
+ __raw_writel(0x0000ffb6, S3C2410_GPCUP);
+ __raw_writel(0xaa95aaa5, S3C2410_GPDCON);
+ __raw_writel(0x00000202, S3C2410_GPDDAT);
+ __raw_writel(0x0000fffd, S3C2410_GPDUP);
+ __raw_writel(0xa56aaaaa, S3C2410_GPECON);
+ __raw_writel(0x0000c7c1, S3C2410_GPEDAT);
+ __raw_writel(0x0000ffff, S3C2410_GPEUP);
+ __raw_writel(0x0000aa22, S3C2410_GPFCON);
+ __raw_writel(0x000000f5, S3C2410_GPFDAT);
+ __raw_writel(0x000000fd, S3C2410_GPFUP);
+ __raw_writel(0xff40010a, S3C2410_GPGCON);
+ __raw_writel(0x0000abf5, S3C2410_GPGDAT);
+ __raw_writel(0x0000fcef, S3C2410_GPGUP);
+ __raw_writel(0x0014aaaa, S3C2410_GPHCON);
+ __raw_writel(0x0000062f, S3C2410_GPHDAT);
+ __raw_writel(0x000007ff, S3C2410_GPHUP);
+
+ /* Turn GPB6 into an output and drive it low. */
+ s3c2410_gpio_cfgpin(S3C2410_GPB6, S3C2410_GPB6_OUTP);
+ s3c2410_gpio_setpin(S3C2410_GPB6, 0);
+
+ /* Turn off the pull up on GPB7. */
+ s3c2410_gpio_pullup(S3C2410_GPB7, 1);
+
+ /* Drive GPC8 low */
+ s3c2410_gpio_cfgpin(S3C2410_GPC8, S3C2410_GPC8_OUTP);
+ s3c2410_gpio_setpin(S3C2410_GPC8, 0);
+ s3c2410_gpio_pullup(S3C2410_GPC8, 1);
+
+ /* Drive GPC9/VD[1] high. */
+ s3c2410_gpio_cfgpin(S3C2410_GPC9, S3C2410_GPC9_OUTP);
+ s3c2410_gpio_setpin(S3C2410_GPC9, 1);
+
+ /* Drive GPC10/VD[2] low. */
+ s3c2410_gpio_cfgpin(S3C2410_GPC10, S3C2410_GPC10_OUTP);
+ s3c2410_gpio_setpin(S3C2410_GPC10, 0);
+
+ /* Disable pull up on RS232 DTR? */
+ s3c2410_gpio_pullup(S3C2410_GPC2, 1);
+
+ /* Enable pull up on GPC6. */
+ s3c2410_gpio_pullup(S3C2410_GPC6, 0);
+
+ /* Turn GPD0 into an output and drive it low. */
+ s3c2410_gpio_cfgpin(S3C2410_GPD0, S3C2410_GPD0_OUTP);
+ s3c2410_gpio_setpin(S3C2410_GPD0, 0);
+ s3c2410_gpio_pullup(S3C2410_GPD0, 1);
+
+ /* Drive VD[9] high and enable the pull up. */
+ s3c2410_gpio_cfgpin(S3C2410_GPD1, S3C2410_GPD1_OUTP);
+ s3c2410_gpio_setpin(S3C2410_GPD1, 1);
+ s3c2410_gpio_pullup(S3C2410_GPD1, 0);
+
+ /* Drive DPD10 low. */
+ s3c2410_gpio_setpin(S3C2410_GPD10, 0);
+ s3c2410_gpio_pullup(S3C2410_GPD10, 1);
+
+ /* This may do something about the power planes. */
+ s3c2410_gpio_setpin(S3C2410_GPE11, 0);
+ s3c2410_gpio_setpin(S3C2410_GPE12, 0);
+ s3c2410_gpio_setpin(S3C2410_GPE13, 0);
+
+ /* Disable pull ups on H8. Don't know why. */
+ s3c2410_gpio_pullup(S3C2410_GPH8, 1);
+
+ /* LCD stuff, ought to be moved to n30_lcd_power.
+ * GPB8 is still an output and drives 0.
+ * GPB9 and GPB10 are turned into inputs.
+ * All pull ups are disabled. */
+ s3c2410_gpio_setpin(S3C2410_GPB8, 0);
+ s3c2410_gpio_pullup(S3C2410_GPB8, 1);
+ s3c2410_gpio_cfgpin(S3C2410_GPB9, S3C2410_GPB9_INP);
+ s3c2410_gpio_pullup(S3C2410_GPB9, 1);
+ s3c2410_gpio_cfgpin(S3C2410_GPB10, S3C2410_GPB10_INP);
+ s3c2410_gpio_pullup(S3C2410_GPB10, 1);
+
+ /* Disable IrDA (not done by WinCE). */
+ s3c2410_gpio_setpin(S3C2410_GPB2, 1);
+
+ /* Disable the GPS. */
+ s3c2410_gpio_setpin(S3C2410_GPB4, 1);
+ s3c2410_gpio_setpin(S3C2410_GPG11, 1);
+
+ /* Turn on flash write protect. */
+ s3c2410_gpio_setpin(S3C2410_GPC5, 0);
+
+ /* Disable pull ups on the SD/MMC port. This should
+ * maybe be done after power has been removed from the
+ * SD/MMC port. */
+ s3c2410_gpio_pullup(S3C2410_GPE5, 1);
+ s3c2410_gpio_pullup(S3C2410_GPE6, 1);
+ s3c2410_gpio_pullup(S3C2410_GPE7, 1);
+ s3c2410_gpio_pullup(S3C2410_GPE8, 1);
+ s3c2410_gpio_pullup(S3C2410_GPE9, 1);
+ s3c2410_gpio_pullup(S3C2410_GPE10, 1);
+
+ /* Disable MMC? On the N30 this makes a difference,
+ * on the N35, maybe not. */
+ s3c2410_gpio_setpin(S3C2410_GPG4, 1);
+
+ /* Enable pull up on SD/MMC switch. */
+ s3c2410_gpio_pullup(S3C2410_GPF1, 0);
+
+ /* Disable pull up on thumbwheel. Why not on the
+ * other inputs too? */
+ s3c2410_gpio_pullup(S3C2410_GPG7, 1);
+
+ /* Disable pull up on SD write protect switch. */
+ s3c2410_gpio_pullup(S3C2410_GPG10, 1);
+
+ /* Disable pull ups on the bluetooth/gps port. */
+ s3c2410_gpio_pullup(S3C2410_GPH6, 1);
+ s3c2410_gpio_pullup(S3C2410_GPH7, 1);
+
+ /* Drive CLKOUT0 high while sleeping. */
+ s3c2410_gpio_cfgpin(S3C2410_GPH9, S3C2410_GPH9_OUTP);
+ s3c2410_gpio_setpin(S3C2410_GPH9, 1);
+
+ /* Drive CLKOUT1 high while sleeping. */
+ s3c2410_gpio_cfgpin(S3C2410_GPH10, S3C2410_GPH10_OUTP);
+ s3c2410_gpio_setpin(S3C2410_GPH10, 1);
+
+ s3c2410_capture_regs();
+ }
+}
+
static void __init n30_map_io(void)
{
s3c24xx_init_io(n30_iodesc, ARRAY_SIZE(n30_iodesc));
@@ -569,6 +752,12 @@ static void __init n30_init(void)
s3c_device_sdi.dev.platform_data = &n30_mmc_cfg;
s3c_device_nand.dev.platform_data = &n30_nand_info;
+ s3c2410_pm_init();
+ enable_irq_wake(IRQ_EINT0);
+
+ memcpy_toio(N30_RESUME_VA, (void *)n30_resume,
+ &n30_resume_end - (void *)n30_resume);
+
/* Clear any locks and write protects on the flash. */
s3c2410_gpio_setpin(S3C2410_GPC5, 1);
msleep(1);
Index: linux-2.6.14/arch/arm/mach-s3c2410/pm.c
===================================================================
--- linux-2.6.14.orig/arch/arm/mach-s3c2410/pm.c
+++ linux-2.6.14/arch/arm/mach-s3c2410/pm.c
@@ -565,6 +565,8 @@ static int s3c2410_pm_enter(suspend_stat
s3c2410_pm_do_save(core_save, ARRAY_SIZE(core_save));
s3c2410_pm_do_save(uart_save, ARRAY_SIZE(uart_save));
+ n30_pm_gpio();
+
/* set the irq configuration for wake */
s3c2410_pm_configure_extint();
@@ -601,6 +603,8 @@ static int s3c2410_pm_enter(suspend_stat
tmp &= S3C2410_GSTATUS2_OFFRESET;
__raw_writel(tmp, S3C2410_GSTATUS2);
+ s3c2410_capture_regs();
+
/* restore the system state */
s3c2410_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
Index: linux-2.6.14/arch/arm/mach-s3c2410/sleep.S
===================================================================
--- linux-2.6.14.orig/arch/arm/mach-s3c2410/sleep.S
+++ linux-2.6.14/arch/arm/mach-s3c2410/sleep.S
@@ -80,6 +80,7 @@ ENTRY(s3c2410_cpu_suspend)
orr r7, r7, #S3C2410_REFRESH_SELF @ SDRAM sleep command
orr r8, r8, #S3C2410_MISCCR_SDSLEEP @ SDRAM power-down signals
+ orr r8, r8, #3 @ turn on data pull ups
orr r9, r9, #S3C2410_CLKCON_POWER @ power down command
teq pc, #0 @ first as a trial-run to load cache
Index: linux-2.6.14/arch/arm/Makefile
===================================================================
--- linux-2.6.14.orig/arch/arm/Makefile
+++ linux-2.6.14/arch/arm/Makefile
@@ -99,6 +99,10 @@ textaddr-$(CONFIG_ARCH_FORTUNET) := 0x
machine-$(CONFIG_ARCH_IMX) := imx
machine-$(CONFIG_ARCH_H720X) := h720x
machine-$(CONFIG_ARCH_AAEC2000) := aaec2000
+# The Acer N30/N35 needs to put some code at 0xc0201000 to handle
+# the watchdog interrupt and resume from suspend.
+textaddr-$(CONFIG_MACH_N30) := 0xc0208000
+textaddr-$(CONFIG_MACH_N35) := 0xc0208000
ifeq ($(CONFIG_ARCH_EBSA110),y)
# This is what happens if you forget the IOCS16 line.
Index: linux-2.6.14/arch/arm/mm/init.c
===================================================================
--- linux-2.6.14.orig/arch/arm/mm/init.c
+++ linux-2.6.14/arch/arm/mm/init.c
@@ -230,6 +230,9 @@ static __init void reserve_node_zero(pg_
#endif
if (res_size)
reserve_bootmem_node(pgdat, PHYS_OFFSET, res_size);
+
+ if (machine_is_n30() || machine_is_n35())
+ reserve_bootmem_node(pgdat, 0x30201000, PAGE_SIZE);
}
void __init build_mem_type_table(void);
Index: linux-2.6.14/arch/arm/mach-s3c2410/Makefile.boot
===================================================================
--- linux-2.6.14.orig/arch/arm/mach-s3c2410/Makefile.boot
+++ linux-2.6.14/arch/arm/mach-s3c2410/Makefile.boot
@@ -1,3 +1,7 @@
zreladdr-y := 0x30008000
params_phys-y := 0x30000100
+# The N30/N35 needs 0x30201000 for the bootloader interface. So place
+# the kernel after that.
+zreladdr-$(CONFIG_MACH_N30) := 0x30208000
+zreladdr-$(CONFIG_MACH_N35) := 0x30208000
|
