[ARM] 2887/1: OMAP 2/4: Update files common to omap1 and omap2, take 2
Patch from Tony Lindgren
This patch syncs the mainline kernel with linux-omap tree.
The highlights of the patch are:
- Clock updates by Tuukka Tikkanen, Juha Yrjola,
Daniel Petrini and Tony Lindgren
- DMA fixes by Imre Deak, Juha Yrjola and Daniel Petrini
- Add support to dual-mode hardware timers by Lauri Leukkunen
- GPIO support for 24xx by Paul Mundt
- GPIO wake-up support by Tony Lindgren
- Better GPIO interrupt handler to not lose interrupts by
Ralph Walden and Ladislav Michl
- Power Management updates by Tuukka Tikkanen
- Make Power Management code use new SRAM functions by
Tony Lindgren
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-omap/pm.c b/arch/arm/plat-omap/pm.c
index e6536b1..e15c6c1 100644
--- a/arch/arm/plat-omap/pm.c
+++ b/arch/arm/plat-omap/pm.c
@@ -39,24 +39,32 @@
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/pm.h>
+#include <linux/interrupt.h>
#include <asm/io.h>
+#include <asm/irq.h>
#include <asm/mach/time.h>
-#include <asm/mach-types.h>
+#include <asm/mach/irq.h>
-#include <asm/arch/omap16xx.h>
+#include <asm/mach-types.h>
+#include <asm/arch/irqs.h>
+#include <asm/arch/tc.h>
#include <asm/arch/pm.h>
#include <asm/arch/mux.h>
-#include <asm/arch/tc.h>
#include <asm/arch/tps65010.h>
+#include <asm/arch/dsp_common.h>
#include "clock.h"
+#include "sram.h"
static unsigned int arm_sleep_save[ARM_SLEEP_SAVE_SIZE];
static unsigned short ulpd_sleep_save[ULPD_SLEEP_SAVE_SIZE];
static unsigned int mpui1510_sleep_save[MPUI1510_SLEEP_SAVE_SIZE];
static unsigned int mpui1610_sleep_save[MPUI1610_SLEEP_SAVE_SIZE];
+static void (*omap_sram_idle)(void) = NULL;
+static void (*omap_sram_suspend)(unsigned long r0, unsigned long r1) = NULL;
+
/*
* Let's power down on idle, but only if we are really
* idle, because once we start down the path of
@@ -65,7 +73,6 @@
*/
void omap_pm_idle(void)
{
- int (*func_ptr)(void) = 0;
unsigned int mask32 = 0;
/*
@@ -84,6 +91,13 @@
mask32 = omap_readl(ARM_SYSST);
/*
+ * Prevent the ULPD from entering low power state by setting
+ * POWER_CTRL_REG:4 = 0
+ */
+ omap_writew(omap_readw(ULPD_POWER_CTRL) &
+ ~ULPD_DEEP_SLEEP_TRANSITION_EN, ULPD_POWER_CTRL);
+
+ /*
* Since an interrupt may set up a timer, we don't want to
* reprogram the hardware timer with interrupts enabled.
* Re-enable interrupts only after returning from idle.
@@ -92,18 +106,9 @@
if ((mask32 & DSP_IDLE) == 0) {
__asm__ volatile ("mcr p15, 0, r0, c7, c0, 4");
- } else {
+ } else
+ omap_sram_idle();
- if (cpu_is_omap1510()) {
- func_ptr = (void *)(OMAP1510_SRAM_IDLE_SUSPEND);
- } else if (cpu_is_omap1610() || cpu_is_omap1710()) {
- func_ptr = (void *)(OMAP1610_SRAM_IDLE_SUSPEND);
- } else if (cpu_is_omap5912()) {
- func_ptr = (void *)(OMAP5912_SRAM_IDLE_SUSPEND);
- }
-
- func_ptr();
- }
local_fiq_enable();
local_irq_enable();
}
@@ -115,58 +120,55 @@
*/
static void omap_pm_wakeup_setup(void)
{
- /*
- * Enable ARM XOR clock and release peripheral from reset by
- * writing 1 to PER_EN bit in ARM_RSTCT2, this is required
- * for UART configuration to use UART2 to wake up.
- */
-
- omap_writel(omap_readl(ARM_IDLECT2) | ENABLE_XORCLK, ARM_IDLECT2);
- omap_writel(omap_readl(ARM_RSTCT2) | PER_EN, ARM_RSTCT2);
- omap_writew(MODEM_32K_EN, ULPD_CLOCK_CTRL);
+ u32 level1_wake = OMAP_IRQ_BIT(INT_IH2_IRQ);
+ u32 level2_wake = OMAP_IRQ_BIT(INT_UART2) | OMAP_IRQ_BIT(INT_KEYBOARD);
/*
- * Turn off all interrupts except L1-2nd level cascade,
- * and the L2 wakeup interrupts: keypad and UART2.
+ * Turn off all interrupts except GPIO bank 1, L1-2nd level cascade,
+ * and the L2 wakeup interrupts: keypad and UART2. Note that the
+ * drivers must still separately call omap_set_gpio_wakeup() to
+ * wake up to a GPIO interrupt.
*/
+ if (cpu_is_omap1510() || cpu_is_omap16xx())
+ level1_wake |= OMAP_IRQ_BIT(INT_GPIO_BANK1);
+ else if (cpu_is_omap730())
+ level1_wake |= OMAP_IRQ_BIT(INT_730_GPIO_BANK1);
- omap_writel(~IRQ_LEVEL2, OMAP_IH1_MIR);
+ omap_writel(~level1_wake, OMAP_IH1_MIR);
- if (cpu_is_omap1510()) {
- omap_writel(~(IRQ_UART2 | IRQ_KEYBOARD), OMAP_IH2_MIR);
- }
+ if (cpu_is_omap1510())
+ omap_writel(~level2_wake, OMAP_IH2_MIR);
+ /* INT_1610_WAKE_UP_REQ is needed for GPIO wakeup... */
if (cpu_is_omap16xx()) {
- omap_writel(~(IRQ_UART2 | IRQ_KEYBOARD), OMAP_IH2_0_MIR);
-
- omap_writel(~0x0, OMAP_IH2_1_MIR);
+ omap_writel(~level2_wake, OMAP_IH2_0_MIR);
+ omap_writel(~OMAP_IRQ_BIT(INT_1610_WAKE_UP_REQ), OMAP_IH2_1_MIR);
omap_writel(~0x0, OMAP_IH2_2_MIR);
omap_writel(~0x0, OMAP_IH2_3_MIR);
}
- /* New IRQ agreement */
+ /* New IRQ agreement, recalculate in cascade order */
+ omap_writel(1, OMAP_IH2_CONTROL);
omap_writel(1, OMAP_IH1_CONTROL);
-
- /* external PULL to down, bit 22 = 0 */
- omap_writel(omap_readl(PULL_DWN_CTRL_2) & ~(1<<22), PULL_DWN_CTRL_2);
}
void omap_pm_suspend(void)
{
- unsigned int mask32 = 0;
unsigned long arg0 = 0, arg1 = 0;
- int (*func_ptr)(unsigned short, unsigned short) = 0;
- unsigned short save_dsp_idlect2;
- printk("PM: OMAP%x is entering deep sleep now ...\n", system_rev);
+ printk("PM: OMAP%x is trying to enter deep sleep...\n", system_rev);
+
+ omap_serial_wake_trigger(1);
if (machine_is_omap_osk()) {
/* Stop LED1 (D9) blink */
tps65010_set_led(LED1, OFF);
}
+ omap_writew(0xffff, ULPD_SOFT_DISABLE_REQ_REG);
+
/*
- * Step 1: turn off interrupts
+ * Step 1: turn off interrupts (FIXME: NOTE: already disabled)
*/
local_irq_disable();
@@ -207,6 +209,8 @@
ARM_SAVE(ARM_CKCTL);
ARM_SAVE(ARM_IDLECT1);
ARM_SAVE(ARM_IDLECT2);
+ if (!(cpu_is_omap1510()))
+ ARM_SAVE(ARM_IDLECT3);
ARM_SAVE(ARM_EWUPCT);
ARM_SAVE(ARM_RSTCT1);
ARM_SAVE(ARM_RSTCT2);
@@ -214,42 +218,12 @@
ULPD_SAVE(ULPD_CLOCK_CTRL);
ULPD_SAVE(ULPD_STATUS_REQ);
- /*
- * Step 3: LOW_PWR signal enabling
- *
- * Allow the LOW_PWR signal to be visible on MPUIO5 ball.
- */
- if (cpu_is_omap1510()) {
- /* POWER_CTRL_REG = 0x1 (LOW_POWER is available) */
- omap_writew(omap_readw(ULPD_POWER_CTRL) |
- OMAP1510_ULPD_LOW_POWER_REQ, ULPD_POWER_CTRL);
- } else if (cpu_is_omap16xx()) {
- /* POWER_CTRL_REG = 0x1 (LOW_POWER is available) */
- omap_writew(omap_readw(ULPD_POWER_CTRL) |
- OMAP1610_ULPD_LOW_POWER_REQ, ULPD_POWER_CTRL);
- }
-
- /* configure LOW_PWR pin */
- omap_cfg_reg(T20_1610_LOW_PWR);
+ /* (Step 3 removed - we now allow deep sleep by default) */
/*
* Step 4: OMAP DSP Shutdown
*/
- /* Set DSP_RST = 1 and DSP_EN = 0, put DSP block into reset */
- omap_writel((omap_readl(ARM_RSTCT1) | DSP_RST) & ~DSP_ENABLE,
- ARM_RSTCT1);
-
- /* Set DSP boot mode to DSP-IDLE, DSP_BOOT_MODE = 0x2 */
- omap_writel(DSP_IDLE_MODE, MPUI_DSP_BOOT_CONFIG);
-
- /* Set EN_DSPCK = 0, stop DSP block clock */
- omap_writel(omap_readl(ARM_CKCTL) & ~DSP_CLOCK_ENABLE, ARM_CKCTL);
-
- /* Stop any DSP domain clocks */
- omap_writel(omap_readl(ARM_IDLECT2) | (1<<EN_APICK), ARM_IDLECT2);
- save_dsp_idlect2 = __raw_readw(DSP_IDLECT2);
- __raw_writew(0, DSP_IDLECT2);
/*
* Step 5: Wakeup Event Setup
@@ -258,24 +232,9 @@
omap_pm_wakeup_setup();
/*
- * Step 6a: ARM and Traffic controller shutdown
- *
- * Step 6 starts here with clock and watchdog disable
+ * Step 6: ARM and Traffic controller shutdown
*/
- /* stop clocks */
- mask32 = omap_readl(ARM_IDLECT2);
- mask32 &= ~(1<<EN_WDTCK); /* bit 0 -> 0 (WDT clock) */
- mask32 |= (1<<EN_XORPCK); /* bit 1 -> 1 (XORPCK clock) */
- mask32 &= ~(1<<EN_PERCK); /* bit 2 -> 0 (MPUPER_CK clock) */
- mask32 &= ~(1<<EN_LCDCK); /* bit 3 -> 0 (LCDC clock) */
- mask32 &= ~(1<<EN_LBCK); /* bit 4 -> 0 (local bus clock) */
- mask32 |= (1<<EN_APICK); /* bit 6 -> 1 (MPUI clock) */
- mask32 &= ~(1<<EN_TIMCK); /* bit 7 -> 0 (MPU timer clock) */
- mask32 &= ~(1<<DMACK_REQ); /* bit 8 -> 0 (DMAC clock) */
- mask32 &= ~(1<<EN_GPIOCK); /* bit 9 -> 0 (GPIO clock) */
- omap_writel(mask32, ARM_IDLECT2);
-
/* disable ARM watchdog */
omap_writel(0x00F5, OMAP_WDT_TIMER_MODE);
omap_writel(0x00A0, OMAP_WDT_TIMER_MODE);
@@ -295,47 +254,24 @@
arg0 = arm_sleep_save[ARM_SLEEP_SAVE_ARM_IDLECT1];
arg1 = arm_sleep_save[ARM_SLEEP_SAVE_ARM_IDLECT2];
- if (cpu_is_omap1510()) {
- func_ptr = (void *)(OMAP1510_SRAM_API_SUSPEND);
- } else if (cpu_is_omap1610() || cpu_is_omap1710()) {
- func_ptr = (void *)(OMAP1610_SRAM_API_SUSPEND);
- } else if (cpu_is_omap5912()) {
- func_ptr = (void *)(OMAP5912_SRAM_API_SUSPEND);
- }
-
/*
* Step 6c: ARM and Traffic controller shutdown
*
* Jump to assembly code. The processor will stay there
* until wake up.
*/
-
- func_ptr(arg0, arg1);
+ omap_sram_suspend(arg0, arg1);
/*
* If we are here, processor is woken up!
*/
- if (cpu_is_omap1510()) {
- /* POWER_CTRL_REG = 0x0 (LOW_POWER is disabled) */
- omap_writew(omap_readw(ULPD_POWER_CTRL) &
- ~OMAP1510_ULPD_LOW_POWER_REQ, ULPD_POWER_CTRL);
- } else if (cpu_is_omap16xx()) {
- /* POWER_CTRL_REG = 0x0 (LOW_POWER is disabled) */
- omap_writew(omap_readw(ULPD_POWER_CTRL) &
- ~OMAP1610_ULPD_LOW_POWER_REQ, ULPD_POWER_CTRL);
- }
-
-
- /* Restore DSP clocks */
- omap_writel(omap_readl(ARM_IDLECT2) | (1<<EN_APICK), ARM_IDLECT2);
- __raw_writew(save_dsp_idlect2, DSP_IDLECT2);
- ARM_RESTORE(ARM_IDLECT2);
-
/*
* Restore ARM state, except ARM_IDLECT1/2 which omap_cpu_suspend did
*/
+ if (!(cpu_is_omap1510()))
+ ARM_RESTORE(ARM_IDLECT3);
ARM_RESTORE(ARM_CKCTL);
ARM_RESTORE(ARM_EWUPCT);
ARM_RESTORE(ARM_RSTCT1);
@@ -366,6 +302,8 @@
MPUI1610_RESTORE(OMAP_IH2_3_MIR);
}
+ omap_writew(0, ULPD_SOFT_DISABLE_REQ_REG);
+
/*
* Reenable interrupts
*/
@@ -373,6 +311,8 @@
local_irq_enable();
local_fiq_enable();
+ omap_serial_wake_trigger(0);
+
printk("PM: OMAP%x is re-starting from deep sleep...\n", system_rev);
if (machine_is_omap_osk()) {
@@ -401,6 +341,8 @@
ARM_SAVE(ARM_CKCTL);
ARM_SAVE(ARM_IDLECT1);
ARM_SAVE(ARM_IDLECT2);
+ if (!(cpu_is_omap1510()))
+ ARM_SAVE(ARM_IDLECT3);
ARM_SAVE(ARM_EWUPCT);
ARM_SAVE(ARM_RSTCT1);
ARM_SAVE(ARM_RSTCT2);
@@ -436,6 +378,7 @@
"ARM_CKCTL_REG: 0x%-8x \n"
"ARM_IDLECT1_REG: 0x%-8x \n"
"ARM_IDLECT2_REG: 0x%-8x \n"
+ "ARM_IDLECT3_REG: 0x%-8x \n"
"ARM_EWUPCT_REG: 0x%-8x \n"
"ARM_RSTCT1_REG: 0x%-8x \n"
"ARM_RSTCT2_REG: 0x%-8x \n"
@@ -449,6 +392,7 @@
ARM_SHOW(ARM_CKCTL),
ARM_SHOW(ARM_IDLECT1),
ARM_SHOW(ARM_IDLECT2),
+ ARM_SHOW(ARM_IDLECT3),
ARM_SHOW(ARM_EWUPCT),
ARM_SHOW(ARM_RSTCT1),
ARM_SHOW(ARM_RSTCT2),
@@ -507,7 +451,7 @@
entry = create_proc_read_entry("driver/omap_pm",
S_IWUSR | S_IRUGO, NULL,
- omap_pm_read_proc, 0);
+ omap_pm_read_proc, NULL);
}
#endif /* DEBUG && CONFIG_PROC_FS */
@@ -580,7 +524,21 @@
}
-struct pm_ops omap_pm_ops ={
+static irqreturn_t omap_wakeup_interrupt(int irq, void * dev,
+ struct pt_regs * regs)
+{
+ return IRQ_HANDLED;
+}
+
+static struct irqaction omap_wakeup_irq = {
+ .name = "peripheral wakeup",
+ .flags = SA_INTERRUPT,
+ .handler = omap_wakeup_interrupt
+};
+
+
+
+static struct pm_ops omap_pm_ops ={
.pm_disk_mode = 0,
.prepare = omap_pm_prepare,
.enter = omap_pm_enter,
@@ -590,42 +548,61 @@
static int __init omap_pm_init(void)
{
printk("Power Management for TI OMAP.\n");
- pm_idle = omap_pm_idle;
/*
* We copy the assembler sleep/wakeup routines to SRAM.
* These routines need to be in SRAM as that's the only
* memory the MPU can see when it wakes up.
*/
-
-#ifdef CONFIG_ARCH_OMAP1510
if (cpu_is_omap1510()) {
- memcpy((void *)OMAP1510_SRAM_IDLE_SUSPEND,
- omap1510_idle_loop_suspend,
- omap1510_idle_loop_suspend_sz);
- memcpy((void *)OMAP1510_SRAM_API_SUSPEND, omap1510_cpu_suspend,
- omap1510_cpu_suspend_sz);
- } else
-#endif
- if (cpu_is_omap1610() || cpu_is_omap1710()) {
- memcpy((void *)OMAP1610_SRAM_IDLE_SUSPEND,
- omap1610_idle_loop_suspend,
- omap1610_idle_loop_suspend_sz);
- memcpy((void *)OMAP1610_SRAM_API_SUSPEND, omap1610_cpu_suspend,
- omap1610_cpu_suspend_sz);
- } else if (cpu_is_omap5912()) {
- memcpy((void *)OMAP5912_SRAM_IDLE_SUSPEND,
- omap1610_idle_loop_suspend,
- omap1610_idle_loop_suspend_sz);
- memcpy((void *)OMAP5912_SRAM_API_SUSPEND, omap1610_cpu_suspend,
- omap1610_cpu_suspend_sz);
+ omap_sram_idle = omap_sram_push(omap1510_idle_loop_suspend,
+ omap1510_idle_loop_suspend_sz);
+ omap_sram_suspend = omap_sram_push(omap1510_cpu_suspend,
+ omap1510_cpu_suspend_sz);
+ } else if (cpu_is_omap16xx()) {
+ omap_sram_idle = omap_sram_push(omap1610_idle_loop_suspend,
+ omap1610_idle_loop_suspend_sz);
+ omap_sram_suspend = omap_sram_push(omap1610_cpu_suspend,
+ omap1610_cpu_suspend_sz);
}
+ if (omap_sram_idle == NULL || omap_sram_suspend == NULL) {
+ printk(KERN_ERR "PM not initialized: Missing SRAM support\n");
+ return -ENODEV;
+ }
+
+ pm_idle = omap_pm_idle;
+
+ setup_irq(INT_1610_WAKE_UP_REQ, &omap_wakeup_irq);
+#if 0
+ /* --- BEGIN BOARD-DEPENDENT CODE --- */
+ /* Sleepx mask direction */
+ omap_writew((omap_readw(0xfffb5008) & ~2), 0xfffb5008);
+ /* Unmask sleepx signal */
+ omap_writew((omap_readw(0xfffb5004) & ~2), 0xfffb5004);
+ /* --- END BOARD-DEPENDENT CODE --- */
+#endif
+
+ /* Program new power ramp-up time
+ * (0 for most boards since we don't lower voltage when in deep sleep)
+ */
+ omap_writew(ULPD_SETUP_ANALOG_CELL_3_VAL, ULPD_SETUP_ANALOG_CELL_3);
+
+ /* Setup ULPD POWER_CTRL_REG - enter deep sleep whenever possible */
+ omap_writew(ULPD_POWER_CTRL_REG_VAL, ULPD_POWER_CTRL);
+
+ /* Configure IDLECT3 */
+ if (cpu_is_omap16xx())
+ omap_writel(OMAP1610_IDLECT3_VAL, OMAP1610_IDLECT3);
+
pm_set_ops(&omap_pm_ops);
#if defined(DEBUG) && defined(CONFIG_PROC_FS)
omap_pm_init_proc();
#endif
+ /* configure LOW_PWR pin */
+ omap_cfg_reg(T20_1610_LOW_PWR);
+
return 0;
}
__initcall(omap_pm_init);