*
* OMAP2 Power Management Routines
*
+ * Copyright (C) 2005 Texas Instruments, Inc.
* Copyright (C) 2006 Nokia Corporation
- * Tony Lindgren <tony@atomide.com>
*
- * Copyright (C) 2005 Texas Instruments, Inc.
+ * Written by:
* Richard Woodruff <r-woodruff2@ti.com>
+ * Tony Lindgren
+ * Juha Yrjola
+ * Amit Kucheria <amit.kucheria@nokia.com>
+ * Igor Stoppa <igor.stoppa@nokia.com>
*
* Based on pm.c for omap1
*
#include <linux/sysfs.h>
#include <linux/module.h>
#include <linux/delay.h>
+#include <linux/clk.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/arch/irqs.h>
#include <asm/arch/clock.h>
#include <asm/arch/sram.h>
+#include <asm/arch/gpio.h>
#include <asm/arch/pm.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/board.h>
+#include <asm/arch/gpio.h>
-#include "prcm-regs.h"
+#include "prm.h"
+#include "prm_regbits_24xx.h"
+#include "cm.h"
+#include "cm_regbits_24xx.h"
+#include "sdrc.h"
-static struct clk *vclk;
static void (*omap2_sram_idle)(void);
-static void (*omap2_sram_suspend)(int dllctrl, int cpu_rev);
+static void (*omap2_sram_suspend)(void __iomem *dllctrl);
static void (*saved_idle)(void);
-extern void __init pmdomain_init(void);
-extern void pmdomain_set_autoidle(void);
+static u32 omap2_read_32k_sync_counter(void)
+{
+ return omap_readl(OMAP2_32KSYNCT_BASE + 0x0010);
+}
+
+#ifdef CONFIG_PM_DEBUG
+int omap2_pm_debug = 0;
-static unsigned int omap24xx_sleep_save[OMAP24XX_SLEEP_SAVE_SIZE];
+static int serial_console_clock_disabled;
+static int serial_console_uart;
+static unsigned int serial_console_next_disable;
-void omap2_pm_idle(void)
+static struct clk *console_iclk, *console_fclk;
+
+static void serial_console_kick(void)
{
- local_irq_disable();
- local_fiq_disable();
- if (need_resched()) {
- local_fiq_enable();
- local_irq_enable();
+ serial_console_next_disable = omap2_read_32k_sync_counter();
+ /* Keep the clocks on for 4 secs */
+ serial_console_next_disable += 4 * 32768;
+}
+
+static void serial_wait_tx(void)
+{
+ static const unsigned long uart_bases[3] = {
+ 0x4806a000, 0x4806c000, 0x4806e000
+ };
+ unsigned long lsr_reg;
+ int looped = 0;
+
+ /* Wait for TX FIFO and THR to get empty */
+ lsr_reg = IO_ADDRESS(uart_bases[serial_console_uart - 1] + (5 << 2));
+ while ((__raw_readb(lsr_reg) & 0x60) != 0x60)
+ looped = 1;
+ if (looped)
+ serial_console_kick();
+}
+
+static void serial_console_fclk_mask(u32 *f1, u32 *f2)
+{
+ switch (serial_console_uart) {
+ case 1:
+ *f1 &= ~(1 << 21);
+ break;
+ case 2:
+ *f1 &= ~(1 << 22);
+ break;
+ case 3:
+ *f2 &= ~(1 << 2);
+ break;
+ }
+}
+
+static void serial_console_sleep(int enable)
+{
+ if (console_iclk == NULL || console_fclk == NULL)
return;
+
+ if (enable) {
+ BUG_ON(serial_console_clock_disabled);
+ if (clk_get_usecount(console_fclk) == 0)
+ return;
+ if ((int) serial_console_next_disable - (int) omap2_read_32k_sync_counter() >= 0)
+ return;
+ serial_wait_tx();
+ clk_disable(console_iclk);
+ clk_disable(console_fclk);
+ serial_console_clock_disabled = 1;
+ } else {
+ int serial_wakeup = 0;
+ u32 l;
+
+ switch (serial_console_uart) {
+ case 1:
+ l = prm_read_mod_reg(CORE_MOD, PM_WKST1);
+ if (l & OMAP24XX_ST_UART1)
+ serial_wakeup = 1;
+ break;
+ case 2:
+ l = prm_read_mod_reg(CORE_MOD, PM_WKST1);
+ if (l & OMAP24XX_ST_UART2)
+ serial_wakeup = 1;
+ break;
+ case 3:
+ l = prm_read_mod_reg(CORE_MOD, OMAP24XX_PM_WKST2);
+ if (l & OMAP24XX_ST_UART3)
+ serial_wakeup = 1;
+ break;
+ }
+ if (serial_wakeup)
+ serial_console_kick();
+ if (!serial_console_clock_disabled)
+ return;
+ clk_enable(console_iclk);
+ clk_enable(console_fclk);
+ serial_console_clock_disabled = 0;
}
+}
- /*
- * 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.
- */
- timer_dyn_reprogram();
+static void pm_init_serial_console(void)
+{
+ const struct omap_serial_console_config *conf;
+ char name[16];
+ u32 l;
- omap2_sram_idle();
- local_fiq_enable();
- local_irq_enable();
+ conf = omap_get_config(OMAP_TAG_SERIAL_CONSOLE,
+ struct omap_serial_console_config);
+ if (conf == NULL)
+ return;
+ if (conf->console_uart > 3 || conf->console_uart < 1)
+ return;
+ serial_console_uart = conf->console_uart;
+ sprintf(name, "uart%d_fck", conf->console_uart);
+ console_fclk = clk_get(NULL, name);
+ if (IS_ERR(console_fclk))
+ console_fclk = NULL;
+ name[6] = 'i';
+ console_iclk = clk_get(NULL, name);
+ if (IS_ERR(console_fclk))
+ console_iclk = NULL;
+ if (console_fclk == NULL || console_iclk == NULL) {
+ serial_console_uart = 0;
+ return;
+ }
+ switch (serial_console_uart) {
+ case 1:
+ l = prm_read_mod_reg(CORE_MOD, PM_WKEN1);
+ l |= OMAP24XX_ST_UART1;
+ prm_write_mod_reg(l, CORE_MOD, PM_WKEN1);
+ break;
+ case 2:
+ l = prm_read_mod_reg(CORE_MOD, PM_WKEN1);
+ l |= OMAP24XX_ST_UART2;
+ prm_write_mod_reg(l, CORE_MOD, PM_WKEN1);
+ break;
+ case 3:
+ l = prm_read_mod_reg(CORE_MOD, OMAP24XX_PM_WKEN2);
+ l |= OMAP24XX_ST_UART3;
+ prm_write_mod_reg(l, CORE_MOD, OMAP24XX_PM_WKEN2);
+ break;
+ }
}
-static int omap2_pm_prepare(void)
+#define DUMP_PRM_MOD_REG(mod, reg) \
+ regs[reg_count].name = #mod "." #reg; \
+ regs[reg_count++].val = prm_read_mod_reg(mod, reg)
+#define DUMP_CM_MOD_REG(mod, reg) \
+ regs[reg_count].name = #mod "." #reg; \
+ regs[reg_count++].val = cm_read_mod_reg(mod, reg)
+#define DUMP_PRM_REG(reg) \
+ regs[reg_count].name = #reg; \
+ regs[reg_count++].val = prm_read_reg(reg)
+#define DUMP_CM_REG(reg) \
+ regs[reg_count].name = #reg; \
+ regs[reg_count++].val = cm_read_reg(reg)
+#define DUMP_INTC_REG(reg, off) \
+ regs[reg_count].name = #reg; \
+ regs[reg_count++].val = __raw_readl(IO_ADDRESS(0x480fe000 + (off)))
+
+static void omap2_pm_dump(int mode, int resume, unsigned int us)
{
- /* We cannot sleep in idle until we have resumed */
- saved_idle = pm_idle;
- pm_idle = NULL;
- return 0;
+ struct reg {
+ const char *name;
+ u32 val;
+ } regs[32];
+ int reg_count = 0, i;
+ const char *s1 = NULL, *s2 = NULL;
+
+ if (!resume) {
+#if 0
+ /* MPU */
+ DUMP_PRM_REG(OMAP24XX_PRCM_IRQENABLE_MPU);
+ DUMP_CM_MOD_REG(MPU_MOD, CM_CLKSTCTRL);
+ DUMP_PRM_MOD_REG(MPU_MOD, PM_PWSTCTRL);
+ DUMP_PRM_MOD_REG(MPU_MOD, PM_PWSTST);
+ DUMP_PRM_MOD_REG(MPU_MOD, PM_WKDEP);
+#endif
+#if 0
+ /* INTC */
+ DUMP_INTC_REG(INTC_MIR0, 0x0084);
+ DUMP_INTC_REG(INTC_MIR1, 0x00a4);
+ DUMP_INTC_REG(INTC_MIR2, 0x00c4);
+#endif
+#if 0
+ DUMP_CM_MOD_REG(CORE_MOD, CM_FCLKEN1);
+ DUMP_CM_MOD_REG(CORE_MOD, CM_FCLKEN2);
+ DUMP_CM_MOD_REG(WKUP_MOD, CM_FCLKEN);
+ DUMP_CM_MOD_REG(CORE_MOD, CM_ICLKEN1);
+ DUMP_CM_MOD_REG(CORE_MOD, CM_ICLKEN2);
+ DUMP_CM_MOD_REG(WKUP_MOD, CM_ICLKEN);
+ DUMP_CM_MOD_REG(PLL_MOD, CM_CLKEN_PLL);
+ DUMP_PRM_REG(OMAP24XX_PRCM_CLKEMUL_CTRL);
+ DUMP_CM_MOD_REG(PLL_MOD, CM_AUTOIDLE);
+ DUMP_PRM_MOD_REG(CORE_REG, PM_PWSTST);
+ DUMP_PRM_REG(OMAP24XX_PRCM_CLKSRC_CTRL);
+#endif
+#if 0
+ /* DSP */
+ DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_FCLKEN);
+ DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_ICLKEN);
+ DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_IDLEST);
+ DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_AUTOIDLE);
+ DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_CLKSEL);
+ DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_CLKSTCTRL);
+ DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, RM_RSTCTRL);
+ DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, RM_RSTST);
+ DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, PM_PWSTCTRL);
+ DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, PM_PWSTST);
+#endif
+ } else {
+ DUMP_PRM_MOD_REG(CORE_MOD, PM_WKST1);
+ DUMP_PRM_MOD_REG(CORE_MOD, OMAP24XX_PM_WKST2);
+ DUMP_PRM_MOD_REG(WKUP_MOD, PM_WKST);
+ DUMP_PRM_REG(OMAP24XX_PRCM_IRQSTATUS_MPU);
+#if 1
+ DUMP_INTC_REG(INTC_PENDING_IRQ0, 0x0098);
+ DUMP_INTC_REG(INTC_PENDING_IRQ1, 0x00b8);
+ DUMP_INTC_REG(INTC_PENDING_IRQ2, 0x00d8);
+#endif
+ }
+
+ switch (mode) {
+ case 0:
+ s1 = "full";
+ s2 = "retention";
+ break;
+ case 1:
+ s1 = "MPU";
+ s2 = "retention";
+ break;
+ case 2:
+ s1 = "MPU";
+ s2 = "idle";
+ break;
+ }
+
+ if (!resume)
+#if defined(CONFIG_NO_IDLE_HZ) || defined(CONFIG_NO_HZ)
+ printk("--- Going to %s %s (next timer after %u ms)\n", s1, s2,
+ jiffies_to_msecs(get_next_timer_interrupt(jiffies) -
+ jiffies));
+#else
+ printk("--- Going to %s %s\n", s1, s2);
+#endif
+ else
+ printk("--- Woke up (slept for %u.%03u ms)\n", us / 1000, us % 1000);
+ for (i = 0; i < reg_count; i++)
+ printk("%-20s: 0x%08x\n", regs[i].name, regs[i].val);
}
-#define INT0_WAKE_MASK (OMAP_IRQ_BIT(INT_24XX_GPIO_BANK1) | \
- OMAP_IRQ_BIT(INT_24XX_GPIO_BANK2) | \
- OMAP_IRQ_BIT(INT_24XX_GPIO_BANK3))
+#else
+static inline void serial_console_sleep(int enable) {}
+static inline void pm_init_serial_console(void) {}
+static inline void omap2_pm_dump(int mode, int resume, unsigned int us) {}
+static inline void serial_console_fclk_mask(u32 *f1, u32 *f2) {}
-#define INT1_WAKE_MASK (OMAP_IRQ_BIT(INT_24XX_GPIO_BANK4))
+#define omap2_pm_debug 0
-#define INT2_WAKE_MASK (OMAP_IRQ_BIT(INT_24XX_UART1_IRQ) | \
- OMAP_IRQ_BIT(INT_24XX_UART2_IRQ) | \
- OMAP_IRQ_BIT(INT_24XX_UART3_IRQ))
+#endif
-#define preg(reg) printk("%s\t(0x%p):\t0x%08x\n", #reg, ®, reg);
+static unsigned short enable_dyn_sleep = 0; /* disabled till drivers are fixed */
-static void omap2_pm_debug(char * desc)
+static ssize_t omap_pm_sleep_while_idle_show(struct kset * subsys, char *buf)
{
- printk("%s:\n", desc);
-
- preg(CM_CLKSTCTRL_MPU);
- preg(CM_CLKSTCTRL_CORE);
- preg(CM_CLKSTCTRL_GFX);
- preg(CM_CLKSTCTRL_DSP);
- preg(CM_CLKSTCTRL_MDM);
-
- preg(PM_PWSTCTRL_MPU);
- preg(PM_PWSTCTRL_CORE);
- preg(PM_PWSTCTRL_GFX);
- preg(PM_PWSTCTRL_DSP);
- preg(PM_PWSTCTRL_MDM);
-
- preg(PM_PWSTST_MPU);
- preg(PM_PWSTST_CORE);
- preg(PM_PWSTST_GFX);
- preg(PM_PWSTST_DSP);
- preg(PM_PWSTST_MDM);
-
- preg(CM_AUTOIDLE1_CORE);
- preg(CM_AUTOIDLE2_CORE);
- preg(CM_AUTOIDLE3_CORE);
- preg(CM_AUTOIDLE4_CORE);
- preg(CM_AUTOIDLE_WKUP);
- preg(CM_AUTOIDLE_PLL);
- preg(CM_AUTOIDLE_DSP);
- preg(CM_AUTOIDLE_MDM);
-
- preg(CM_ICLKEN1_CORE);
- preg(CM_ICLKEN2_CORE);
- preg(CM_ICLKEN3_CORE);
- preg(CM_ICLKEN4_CORE);
- preg(CM_ICLKEN_GFX);
- preg(CM_ICLKEN_WKUP);
- preg(CM_ICLKEN_DSP);
- preg(CM_ICLKEN_MDM);
-
- preg(CM_IDLEST1_CORE);
- preg(CM_IDLEST2_CORE);
- preg(CM_IDLEST3_CORE);
- preg(CM_IDLEST4_CORE);
- preg(CM_IDLEST_GFX);
- preg(CM_IDLEST_WKUP);
- preg(CM_IDLEST_CKGEN);
- preg(CM_IDLEST_DSP);
- preg(CM_IDLEST_MDM);
-
- preg(RM_RSTST_MPU);
- preg(RM_RSTST_GFX);
- preg(RM_RSTST_WKUP);
- preg(RM_RSTST_DSP);
- preg(RM_RSTST_MDM);
-
- preg(PM_WKDEP_MPU);
- preg(PM_WKDEP_CORE);
- preg(PM_WKDEP_GFX);
- preg(PM_WKDEP_DSP);
- preg(PM_WKDEP_MDM);
-
- preg(CM_FCLKEN_WKUP);
- preg(CM_ICLKEN_WKUP);
- preg(CM_IDLEST_WKUP);
- preg(CM_AUTOIDLE_WKUP);
- preg(CM_CLKSEL_WKUP);
-
- preg(PM_WKEN_WKUP);
- preg(PM_WKST_WKUP);
+ return sprintf(buf, "%hu\n", enable_dyn_sleep);
}
-static inline void omap2_pm_save_registers(void)
+static ssize_t omap_pm_sleep_while_idle_store(struct kset * subsys,
+ const char * buf,
+ size_t n)
{
- /* Save interrupt registers */
- OMAP24XX_SAVE(INTC_MIR0);
- OMAP24XX_SAVE(INTC_MIR1);
- OMAP24XX_SAVE(INTC_MIR2);
-
- /* Save power control registers */
- OMAP24XX_SAVE(CM_CLKSTCTRL_MPU);
- OMAP24XX_SAVE(CM_CLKSTCTRL_CORE);
- OMAP24XX_SAVE(CM_CLKSTCTRL_GFX);
- OMAP24XX_SAVE(CM_CLKSTCTRL_DSP);
- OMAP24XX_SAVE(CM_CLKSTCTRL_MDM);
-
- /* Save power state registers */
- OMAP24XX_SAVE(PM_PWSTCTRL_MPU);
- OMAP24XX_SAVE(PM_PWSTCTRL_CORE);
- OMAP24XX_SAVE(PM_PWSTCTRL_GFX);
- OMAP24XX_SAVE(PM_PWSTCTRL_DSP);
- OMAP24XX_SAVE(PM_PWSTCTRL_MDM);
-
- /* Save autoidle registers */
- OMAP24XX_SAVE(CM_AUTOIDLE1_CORE);
- OMAP24XX_SAVE(CM_AUTOIDLE2_CORE);
- OMAP24XX_SAVE(CM_AUTOIDLE3_CORE);
- OMAP24XX_SAVE(CM_AUTOIDLE4_CORE);
- OMAP24XX_SAVE(CM_AUTOIDLE_WKUP);
- OMAP24XX_SAVE(CM_AUTOIDLE_PLL);
- OMAP24XX_SAVE(CM_AUTOIDLE_DSP);
- OMAP24XX_SAVE(CM_AUTOIDLE_MDM);
-
- /* Save idle state registers */
- OMAP24XX_SAVE(CM_IDLEST1_CORE);
- OMAP24XX_SAVE(CM_IDLEST2_CORE);
- OMAP24XX_SAVE(CM_IDLEST3_CORE);
- OMAP24XX_SAVE(CM_IDLEST4_CORE);
- OMAP24XX_SAVE(CM_IDLEST_GFX);
- OMAP24XX_SAVE(CM_IDLEST_WKUP);
- OMAP24XX_SAVE(CM_IDLEST_CKGEN);
- OMAP24XX_SAVE(CM_IDLEST_DSP);
- OMAP24XX_SAVE(CM_IDLEST_MDM);
-
- /* Save clock registers */
- OMAP24XX_SAVE(CM_FCLKEN1_CORE);
- OMAP24XX_SAVE(CM_FCLKEN2_CORE);
- OMAP24XX_SAVE(CM_ICLKEN1_CORE);
- OMAP24XX_SAVE(CM_ICLKEN2_CORE);
- OMAP24XX_SAVE(CM_ICLKEN3_CORE);
- OMAP24XX_SAVE(CM_ICLKEN4_CORE);
+ unsigned short value;
+ if (sscanf(buf, "%hu", &value) != 1 ||
+ (value != 0 && value != 1)) {
+ printk(KERN_ERR "idle_sleep_store: Invalid value\n");
+ return -EINVAL;
+ }
+ enable_dyn_sleep = value;
+ return n;
}
-static inline void omap2_pm_restore_registers(void)
+static struct subsys_attribute sleep_while_idle_attr = {
+ .attr = {
+ .name = __stringify(sleep_while_idle),
+ .mode = 0644,
+ },
+ .show = omap_pm_sleep_while_idle_show,
+ .store = omap_pm_sleep_while_idle_store,
+};
+
+static struct clk *osc_ck, *emul_ck;
+
+#define CONTROL_DEVCONF __REG32(OMAP2_CTRL_BASE + 0x274)
+
+static int omap2_fclks_active(void)
{
- /* Restore clock state registers */
- OMAP24XX_RESTORE(CM_CLKSTCTRL_MPU);
- OMAP24XX_RESTORE(CM_CLKSTCTRL_CORE);
- OMAP24XX_RESTORE(CM_CLKSTCTRL_GFX);
- OMAP24XX_RESTORE(CM_CLKSTCTRL_DSP);
- OMAP24XX_RESTORE(CM_CLKSTCTRL_MDM);
-
- /* Restore power state registers */
- OMAP24XX_RESTORE(PM_PWSTCTRL_MPU);
- OMAP24XX_RESTORE(PM_PWSTCTRL_CORE);
- OMAP24XX_RESTORE(PM_PWSTCTRL_GFX);
- OMAP24XX_RESTORE(PM_PWSTCTRL_DSP);
- OMAP24XX_RESTORE(PM_PWSTCTRL_MDM);
-
- /* Restore idle state registers */
- OMAP24XX_RESTORE(CM_IDLEST1_CORE);
- OMAP24XX_RESTORE(CM_IDLEST2_CORE);
- OMAP24XX_RESTORE(CM_IDLEST3_CORE);
- OMAP24XX_RESTORE(CM_IDLEST4_CORE);
- OMAP24XX_RESTORE(CM_IDLEST_GFX);
- OMAP24XX_RESTORE(CM_IDLEST_WKUP);
- OMAP24XX_RESTORE(CM_IDLEST_CKGEN);
- OMAP24XX_RESTORE(CM_IDLEST_DSP);
- OMAP24XX_RESTORE(CM_IDLEST_MDM);
-
- /* Restore autoidle registers */
- OMAP24XX_RESTORE(CM_AUTOIDLE1_CORE);
- OMAP24XX_RESTORE(CM_AUTOIDLE2_CORE);
- OMAP24XX_RESTORE(CM_AUTOIDLE3_CORE);
- OMAP24XX_RESTORE(CM_AUTOIDLE4_CORE);
- OMAP24XX_RESTORE(CM_AUTOIDLE_WKUP);
- OMAP24XX_RESTORE(CM_AUTOIDLE_PLL);
- OMAP24XX_RESTORE(CM_AUTOIDLE_DSP);
- OMAP24XX_RESTORE(CM_AUTOIDLE_MDM);
-
- /* Restore clock registers */
- OMAP24XX_RESTORE(CM_FCLKEN1_CORE);
- OMAP24XX_RESTORE(CM_FCLKEN2_CORE);
- OMAP24XX_RESTORE(CM_ICLKEN1_CORE);
- OMAP24XX_RESTORE(CM_ICLKEN2_CORE);
- OMAP24XX_RESTORE(CM_ICLKEN3_CORE);
- OMAP24XX_RESTORE(CM_ICLKEN4_CORE);
-
- /* REVISIT: Clear interrupts here */
-
- /* Restore interrupt registers */
- OMAP24XX_RESTORE(INTC_MIR0);
- OMAP24XX_RESTORE(INTC_MIR1);
- OMAP24XX_RESTORE(INTC_MIR2);
+ u32 f1, f2;
+
+ f1 = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
+ f2 = cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2);
+ serial_console_fclk_mask(&f1, &f2);
+ if (f1 | f2)
+ return 1;
+ return 0;
}
-static int omap2_pm_suspend(void)
+static int omap2_irq_pending(void)
{
- int processor_type = 0;
+ u32 pending_reg = IO_ADDRESS(0x480fe098);
+ int i;
- /* REVISIT: 0x21 or 0x26? */
- if (cpu_is_omap2420())
- processor_type = 0x21;
+ for (i = 0; i < 4; i++) {
+ if (__raw_readl(pending_reg))
+ return 1;
+ pending_reg += 0x20;
+ }
+ return 0;
+}
- if (!processor_type)
- return -ENOTSUPP;
+static atomic_t sleep_block = ATOMIC_INIT(0);
- local_irq_disable();
- local_fiq_disable();
+void omap2_block_sleep(void)
+{
+ atomic_inc(&sleep_block);
+}
- omap2_pm_save_registers();
+void omap2_allow_sleep(void)
+{
+ int i;
- /* Disable interrupts except for the wake events */
- INTC_MIR_SET0 = 0xffffffff & ~INT0_WAKE_MASK;
- INTC_MIR_SET1 = 0xffffffff & ~INT1_WAKE_MASK;
- INTC_MIR_SET2 = 0xffffffff & ~INT2_WAKE_MASK;
+ i = atomic_dec_return(&sleep_block);
+ BUG_ON(i < 0);
+}
- pmdomain_set_autoidle();
+static void omap2_enter_full_retention(void)
+{
+ u32 sleep_time = 0;
+
+ /* There is 1 reference hold for all children of the oscillator
+ * clock, the following will remove it. If no one else uses the
+ * oscillator itself it will be disabled if/when we enter retention
+ * mode.
+ */
+ clk_disable(osc_ck);
/* Clear old wake-up events */
- PM_WKST1_CORE = 0;
- PM_WKST2_CORE = 0;
- PM_WKST_WKUP = 0;
+ /* REVISIT: These write to reserved bits? */
+ prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1);
+ prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
+ prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST);
- /* Enable wake-up events */
- PM_WKEN1_CORE = (1 << 22) | (1 << 21); /* UART1 & 2 */
- PM_WKEN2_CORE = (1 << 2); /* UART3 */
- PM_WKEN_WKUP = (1 << 2) | (1 << 0); /* GPIO & GPT1 */
+ /* Try to enter retention */
+ prm_write_mod_reg((0x01 << OMAP_POWERSTATE_SHIFT) | OMAP_LOGICRETSTATE,
+ MPU_MOD, PM_PWSTCTRL);
+
+ /* Workaround to kill USB */
+ CONTROL_DEVCONF |= 0x00008000;
- /* Disable clocks except for CM_ICLKEN2_CORE. It gets disabled
- * in the SRAM suspend code */
- CM_FCLKEN1_CORE = 0;
- CM_FCLKEN2_CORE = 0;
- CM_ICLKEN1_CORE = 0;
- CM_ICLKEN3_CORE = 0;
- CM_ICLKEN4_CORE = 0;
+ omap2_gpio_prepare_for_retention();
- omap2_pm_debug("Status before suspend");
+ if (omap2_pm_debug) {
+ omap2_pm_dump(0, 0, 0);
+ sleep_time = omap2_read_32k_sync_counter();
+ }
+
+ /* One last check for pending IRQs to avoid extra latency due
+ * to sleeping unnecessarily. */
+ if (omap2_irq_pending())
+ goto no_sleep;
+
+ serial_console_sleep(1);
+ /* Jump to SRAM suspend code */
+ omap2_sram_suspend(OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL));
+no_sleep:
+ serial_console_sleep(0);
+
+ if (omap2_pm_debug) {
+ unsigned long long tmp;
+ u32 resume_time;
+
+ resume_time = omap2_read_32k_sync_counter();
+ tmp = resume_time - sleep_time;
+ tmp *= 1000000;
+ omap2_pm_dump(0, 1, tmp / 32768);
+ }
+ omap2_gpio_resume_after_retention();
+
+ clk_enable(osc_ck);
+
+}
+
+static int omap2_i2c_active(void)
+{
+ u32 l;
+
+ l = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
+ return l & (OMAP2420_EN_I2C2 | OMAP2420_EN_I2C1);
+}
+
+static int sti_console_enabled;
+
+static int omap2_allow_mpu_retention(void)
+{
+ u32 l;
+
+ if (atomic_read(&sleep_block))
+ return 0;
+
+ /* Check for MMC, UART2, UART1, McSPI2, McSPI1 and DSS1. */
+ l = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
+ if (l & (OMAP2420_EN_MMC | OMAP24XX_EN_UART2 |
+ OMAP24XX_EN_UART1 | OMAP24XX_EN_MCSPI2 |
+ OMAP24XX_EN_MCSPI1 | OMAP24XX_EN_DSS1))
+ return 0;
+ /* Check for UART3. */
+ l = cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2);
+ if (l & OMAP24XX_EN_UART3)
+ return 0;
+ if (sti_console_enabled)
+ return 0;
+
+ return 1;
+}
+
+static void omap2_enter_mpu_retention(void)
+{
+ u32 sleep_time = 0;
+ int only_idle = 0;
+
+ /* Putting MPU into the WFI state while a transfer is active
+ * seems to cause the I2C block to timeout. Why? Good question. */
+ if (omap2_i2c_active())
+ return;
+
+ /* The peripherals seem not to be able to wake up the MPU when
+ * it is in retention mode. */
+ if (omap2_allow_mpu_retention()) {
+ /* REVISIT: These write to reserved bits? */
+ prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1);
+ prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
+ prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST);
+
+ /* Try to enter MPU retention */
+ prm_write_mod_reg((0x01 << OMAP_POWERSTATE_SHIFT) |
+ OMAP_LOGICRETSTATE,
+ MPU_MOD, PM_PWSTCTRL);
+ } else {
+ /* Block MPU retention */
+
+ prm_write_mod_reg(OMAP_LOGICRETSTATE, MPU_MOD, PM_PWSTCTRL);
+ only_idle = 1;
+ }
+
+ if (omap2_pm_debug) {
+ omap2_pm_dump(only_idle ? 2 : 1, 0, 0);
+ sleep_time = omap2_read_32k_sync_counter();
+ }
+
+ omap2_sram_idle();
- /* Must wait for serial buffers to clear */
- mdelay(200);
+ if (omap2_pm_debug) {
+ unsigned long long tmp;
+ u32 resume_time;
- /* Jump to SRAM suspend code
- * REVISIT: When is this SDRC_DLLB_CTRL?
+ resume_time = omap2_read_32k_sync_counter();
+ tmp = resume_time - sleep_time;
+ tmp *= 1000000;
+ omap2_pm_dump(only_idle ? 2 : 1, 1, tmp / 32768);
+ }
+}
+
+static int omap2_can_sleep(void)
+{
+ if (!enable_dyn_sleep)
+ return 0;
+ if (omap2_fclks_active())
+ return 0;
+ if (atomic_read(&sleep_block) > 0)
+ return 0;
+ if (clk_get_usecount(osc_ck) > 1)
+ return 0;
+ if (omap_dma_running())
+ return 0;
+
+ return 1;
+}
+
+static void omap2_pm_idle(void)
+{
+ local_irq_disable();
+ local_fiq_disable();
+
+ if (!omap2_can_sleep()) {
+ /* timer_dyn_reprogram() takes about 100-200 us to complete.
+ * In some contexts (e.g. when waiting for a GPMC-SDRAM DMA
+ * transfer to complete), the increased latency is too much.
+ *
+ * omap2_block_sleep() and omap2_allow_sleep() can be used
+ * to indicate this.
+ */
+ if (atomic_read(&sleep_block) == 0) {
+ timer_dyn_reprogram();
+ if (omap2_irq_pending())
+ goto out;
+ }
+ omap2_enter_mpu_retention();
+ goto out;
+ }
+
+ /*
+ * 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.
*/
- omap2_sram_suspend(SDRC_DLLA_CTRL, processor_type);
+ timer_dyn_reprogram();
- /* Back from sleep */
- omap2_pm_restore_registers();
+ if (omap2_irq_pending())
+ goto out;
+ omap2_enter_full_retention();
+
+out:
local_fiq_enable();
local_irq_enable();
+}
+
+static int omap2_pm_prepare(void)
+{
+ /* We cannot sleep in idle until we have resumed */
+ saved_idle = pm_idle;
+ pm_idle = NULL;
+
+ return 0;
+}
+
+static int omap2_pm_suspend(void)
+{
+ u32 wken_wkup, mir1;
+
+ wken_wkup = prm_read_mod_reg(WKUP_MOD, PM_WKEN);
+ prm_write_mod_reg(wken_wkup & ~OMAP24XX_EN_GPT1, WKUP_MOD, PM_WKEN);
+
+ /* Mask GPT1 */
+ mir1 = omap_readl(0x480fe0a4);
+ omap_writel(1 << 5, 0x480fe0ac);
+
+ omap2_enter_full_retention();
+
+ omap_writel(mir1, 0x480fe0a4);
+ prm_write_mod_reg(wken_wkup, WKUP_MOD, PM_WKEN);
return 0;
}
{
int ret = 0;
- switch (state)
- {
+ switch (state) {
case PM_SUSPEND_STANDBY:
case PM_SUSPEND_MEM:
ret = omap2_pm_suspend();
.valid = suspend_valid_only_mem,
};
+static void __init prcm_setup_regs(void)
+{
+ u32 l;
+
+ /* Enable autoidle */
+ prm_write_reg(OMAP24XX_AUTOIDLE, OMAP24XX_PRCM_SYSCONFIG);
+
+ /* Set all domain wakeup dependencies */
+ prm_write_mod_reg(OMAP_EN_WKUP, MPU_MOD, PM_WKDEP);
+ prm_write_mod_reg(0, OMAP24XX_DSP_MOD, PM_WKDEP);
+ prm_write_mod_reg(0, GFX_MOD, PM_WKDEP);
+
+ l = prm_read_mod_reg(CORE_MOD, PM_PWSTCTRL);
+ /* Enable retention for all memory blocks */
+ l |= OMAP24XX_MEM3RETSTATE | OMAP24XX_MEM2RETSTATE |
+ OMAP24XX_MEM1RETSTATE;
+
+ /* Set power state to RETENTION */
+ l &= ~OMAP_POWERSTATE_MASK;
+ l |= 0x01 << OMAP_POWERSTATE_SHIFT;
+ prm_write_mod_reg(l, CORE_MOD, PM_PWSTCTRL);
+
+ prm_write_mod_reg((0x01 << OMAP_POWERSTATE_SHIFT) |
+ OMAP_LOGICRETSTATE,
+ MPU_MOD, PM_PWSTCTRL);
+
+ /* Power down DSP and GFX */
+ prm_write_mod_reg(OMAP24XX_FORCESTATE | (0x3 << OMAP_POWERSTATE_SHIFT),
+ OMAP24XX_DSP_MOD, PM_PWSTCTRL);
+ prm_write_mod_reg(OMAP24XX_FORCESTATE | (0x3 << OMAP_POWERSTATE_SHIFT),
+ GFX_MOD, PM_PWSTCTRL);
+
+ /* Enable clock auto control for all domains */
+ cm_write_mod_reg(OMAP24XX_AUTOSTATE_MPU, MPU_MOD, CM_CLKSTCTRL);
+ cm_write_mod_reg(OMAP24XX_AUTOSTATE_DSS | OMAP24XX_AUTOSTATE_L4 |
+ OMAP24XX_AUTOSTATE_L3,
+ CORE_MOD, CM_CLKSTCTRL);
+ cm_write_mod_reg(OMAP24XX_AUTOSTATE_GFX, GFX_MOD, CM_CLKSTCTRL);
+ cm_write_mod_reg(OMAP2420_AUTOSTATE_IVA | OMAP24XX_AUTOSTATE_DSP,
+ OMAP24XX_DSP_MOD, CM_CLKSTCTRL);
+
+ /* Enable clock autoidle for all domains */
+ cm_write_mod_reg(OMAP24XX_AUTO_CAM |
+ OMAP24XX_AUTO_MAILBOXES |
+ OMAP24XX_AUTO_WDT4 |
+ OMAP2420_AUTO_WDT3 |
+ OMAP24XX_AUTO_MSPRO |
+ OMAP2420_AUTO_MMC |
+ OMAP24XX_AUTO_FAC |
+ OMAP2420_AUTO_EAC |
+ OMAP24XX_AUTO_HDQ |
+ OMAP24XX_AUTO_UART2 |
+ OMAP24XX_AUTO_UART1 |
+ OMAP24XX_AUTO_I2C2 |
+ OMAP24XX_AUTO_I2C1 |
+ OMAP24XX_AUTO_MCSPI2 |
+ OMAP24XX_AUTO_MCSPI1 |
+ OMAP24XX_AUTO_MCBSP2 |
+ OMAP24XX_AUTO_MCBSP1 |
+ OMAP24XX_AUTO_GPT12 |
+ OMAP24XX_AUTO_GPT11 |
+ OMAP24XX_AUTO_GPT10 |
+ OMAP24XX_AUTO_GPT9 |
+ OMAP24XX_AUTO_GPT8 |
+ OMAP24XX_AUTO_GPT7 |
+ OMAP24XX_AUTO_GPT6 |
+ OMAP24XX_AUTO_GPT5 |
+ OMAP24XX_AUTO_GPT4 |
+ OMAP24XX_AUTO_GPT3 |
+ OMAP24XX_AUTO_GPT2 |
+ OMAP2420_AUTO_VLYNQ |
+ OMAP24XX_AUTO_DSS,
+ CORE_MOD, CM_AUTOIDLE1);
+ cm_write_mod_reg(OMAP24XX_AUTO_UART3 |
+ OMAP24XX_AUTO_SSI |
+ OMAP24XX_AUTO_USB,
+ CORE_MOD, CM_AUTOIDLE2);
+ cm_write_mod_reg(OMAP24XX_AUTO_SDRC |
+ OMAP24XX_AUTO_GPMC |
+ OMAP24XX_AUTO_SDMA,
+ CORE_MOD, OMAP24XX_CM_AUTOIDLE3);
+ cm_write_mod_reg(OMAP24XX_AUTO_PKA |
+ OMAP24XX_AUTO_AES |
+ OMAP24XX_AUTO_RNG |
+ OMAP24XX_AUTO_SHA |
+ OMAP24XX_AUTO_DES,
+ CORE_MOD, OMAP24XX_CM_AUTOIDLE4);
+
+ cm_write_mod_reg(OMAP2420_AUTO_DSP_IPI, OMAP24XX_DSP_MOD, CM_AUTOIDLE);
+
+ /* Put DPLL and both APLLs into autoidle mode */
+ cm_write_mod_reg((0x03 << OMAP24XX_AUTO_DPLL_SHIFT) |
+ (0x03 << OMAP24XX_AUTO_96M_SHIFT) |
+ (0x03 << OMAP24XX_AUTO_54M_SHIFT),
+ PLL_MOD, CM_AUTOIDLE);
+
+ cm_write_mod_reg(OMAP24XX_AUTO_OMAPCTRL |
+ OMAP24XX_AUTO_WDT1 |
+ OMAP24XX_AUTO_MPU_WDT |
+ OMAP24XX_AUTO_GPIOS |
+ OMAP24XX_AUTO_32KSYNC |
+ OMAP24XX_AUTO_GPT1,
+ WKUP_MOD, CM_AUTOIDLE);
+
+ /* REVISIT: Configure number of 32 kHz clock cycles for sys_clk
+ * stabilisation */
+ prm_write_reg(15 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_PRCM_CLKSSETUP);
+
+ /* Configure automatic voltage transition */
+ prm_write_reg(2 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_PRCM_VOLTSETUP);
+ prm_write_reg(OMAP24XX_AUTO_EXTVOLT |
+ (0x1 << OMAP24XX_SETOFF_LEVEL_SHIFT) |
+ OMAP24XX_MEMRETCTRL |
+ (0x1 << OMAP24XX_SETRET_LEVEL_SHIFT) |
+ (0x0 << OMAP24XX_VOLT_LEVEL_SHIFT),
+ OMAP24XX_PRCM_VOLTCTRL);
+
+ /* Enable wake-up events */
+ prm_write_mod_reg(OMAP24XX_EN_GPIOS | OMAP24XX_EN_GPT1,
+ WKUP_MOD, PM_WKEN);
+}
+
int __init omap2_pm_init(void)
{
- printk("Power Management for TI OMAP.\n");
+ u32 l;
+
+ printk(KERN_INFO "Power Management for OMAP2 initializing\n");
+ l = prm_read_reg(OMAP24XX_PRCM_REVISION);
+ printk(KERN_INFO "PRCM revision %d.%d\n", (l >> 4) & 0x0f, l & 0x0f);
- vclk = clk_get(NULL, "virt_prcm_set");
- if (IS_ERR(vclk)) {
- printk(KERN_ERR "Could not get PM vclk\n");
+ osc_ck = clk_get(NULL, "osc_ck");
+ if (IS_ERR(osc_ck)) {
+ printk(KERN_ERR "could not get osc_ck\n");
return -ENODEV;
}
+ if (cpu_is_omap242x()) {
+ emul_ck = clk_get(NULL, "emul_ck");
+ if (IS_ERR(emul_ck)) {
+ printk(KERN_ERR "could not get emul_ck\n");
+ clk_put(osc_ck);
+ return -ENODEV;
+ }
+ }
+
+ prcm_setup_regs();
+
+ pm_init_serial_console();
+
+ /* Hack to prevent MPU retention when STI console is enabled. */
+ {
+ const struct omap_sti_console_config *sti;
+
+ sti = omap_get_config(OMAP_TAG_STI_CONSOLE,
+ struct omap_sti_console_config);
+ if (sti != NULL && sti->enable)
+ sti_console_enabled = 1;
+ }
+
/*
* We copy the assembler sleep/wakeup routines to SRAM.
* These routines need to be in SRAM as that's the only
*/
omap2_sram_idle = omap_sram_push(omap24xx_idle_loop_suspend,
omap24xx_idle_loop_suspend_sz);
-
omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend,
omap24xx_cpu_suspend_sz);
suspend_set_ops(&omap_pm_ops);
pm_idle = omap2_pm_idle;
- pmdomain_init();
+ l = subsys_create_file(&power_subsys, &sleep_while_idle_attr);
+ if (l)
+ printk(KERN_ERR "subsys_create_file failed: %d\n", l);
return 0;
}
-__initcall(omap2_pm_init);
+late_initcall(omap2_pm_init);
projects / linux-2.6-omap-h63xx.git / blobdiff