#include <linux/clk.h>
#include <linux/io.h>
#include <linux/irq.h>
+#include <linux/time.h>
-#include <asm/atomic.h>
#include <asm/mach/time.h>
#include <asm/mach/irq.h>
#include <asm/mach-types.h>
-#include <asm/arch/irqs.h>
-#include <asm/arch/clock.h>
-#include <asm/arch/sram.h>
-#include <asm/arch/control.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 <mach/irqs.h>
+#include <mach/clock.h>
+#include <mach/sram.h>
+#include <mach/control.h>
+#include <mach/gpio.h>
+#include <mach/pm.h>
+#include <mach/mux.h>
+#include <mach/dma.h>
+#include <mach/board.h>
#include "prm.h"
#include "prm-regbits-24xx.h"
#include "sdrc.h"
#include "pm.h"
-/* These addrs are in assembly language code to be patched at runtime */
-extern void *omap2_ocs_sdrc_power;
-extern void *omap2_ocs_sdrc_dlla_ctrl;
+#include <mach/powerdomain.h>
+#include <mach/clockdomain.h>
static void (*omap2_sram_idle)(void);
-static void (*omap2_sram_suspend)(void __iomem *dllctrl);
+static void (*omap2_sram_suspend)(u32 dllctrl, void __iomem *sdrc_dlla_ctrl,
+ void __iomem *sdrc_power);
static void (*saved_idle)(void);
-static unsigned short enable_dyn_sleep = 0; /* disabled till drivers are fixed */
+static struct powerdomain *mpu_pwrdm;
+static struct powerdomain *core_pwrdm;
-static ssize_t idle_show(struct kobject *kobj, struct kobj_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%hu\n", enable_dyn_sleep);
-}
-
-static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr,
- const char *buf, size_t n)
-{
- 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 struct kobj_attribute sleep_while_idle_attr =
- __ATTR(sleep_while_idle, 0644, idle_show, idle_store);
+static struct clockdomain *dsp_clkdm;
+static struct clockdomain *gfx_clkdm;
static struct clk *osc_ck, *emul_ck;
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_irq_pending(void)
-{
- u32 pending_reg = 0x480fe098;
- int i;
+ /* Ignore UART clocks. These are handled by UART core (serial.c) */
+ f1 &= ~(OMAP24XX_EN_UART1 | OMAP24XX_EN_UART2);
+ f2 &= ~OMAP24XX_EN_UART3;
- for (i = 0; i < 4; i++) {
- if (omap_readl(pending_reg))
- return 1;
- pending_reg += 0x20;
- }
+ if (f1 | f2)
+ return 1;
return 0;
}
-static atomic_t sleep_block = ATOMIC_INIT(0);
-
-void omap2_block_sleep(void)
-{
- atomic_inc(&sleep_block);
-}
-
-void omap2_allow_sleep(void)
-{
- int i;
-
- i = atomic_dec_return(&sleep_block);
- BUG_ON(i < 0);
-}
-
static void omap2_enter_full_retention(void)
{
- u32 l, sleep_time = 0;
+ u32 l;
+ struct timespec ts_preidle, ts_postidle, ts_idle;
/* There is 1 reference hold for all children of the oscillator
* clock, the following will remove it. If no one else uses the
prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST);
- /* Try to enter retention */
- prm_write_mod_reg((0x01 << OMAP_POWERSTATE_SHIFT) | OMAP_LOGICRETSTATE,
- MPU_MOD, PM_PWSTCTRL);
+ /*
+ * Set MPU powerdomain's next power state to RETENTION;
+ * preserve logic state during retention
+ */
+ pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET);
+ pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET);
/* Workaround to kill USB */
l = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0) | OMAP24XX_USBSTANDBYCTRL;
if (omap2_pm_debug) {
omap2_pm_dump(0, 0, 0);
- sleep_time = omap2_read_32k_sync_counter();
+ getnstimeofday(&ts_preidle);
}
/* One last check for pending IRQs to avoid extra latency due
* to sleeping unnecessarily. */
- if (omap2_irq_pending())
+ if (omap_irq_pending())
goto no_sleep;
- serial_console_sleep(1);
+ omap_uart_prepare_idle(0);
+ omap_uart_prepare_idle(1);
+ omap_uart_prepare_idle(2);
+
/* Jump to SRAM suspend code */
- omap2_sram_suspend(OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL));
+ omap2_sram_suspend(sdrc_read_reg(SDRC_DLLA_CTRL),
+ OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL),
+ OMAP_SDRC_REGADDR(SDRC_POWER));
no_sleep:
- serial_console_sleep(0);
+ omap_uart_resume_idle(2);
+ omap_uart_resume_idle(1);
+ omap_uart_resume_idle(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);
+ getnstimeofday(&ts_postidle);
+ ts_idle = timespec_sub(ts_postidle, ts_preidle);
+ tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC;
+ omap2_pm_dump(0, 1, tmp);
}
omap2_gpio_resume_after_retention();
prm_clear_mod_reg_bits(0x4 | 0x1, WKUP_MOD, PM_WKST);
/* MPU domain wake events */
- l = __raw_readl(OMAP24XX_PRCM_IRQSTATUS_MPU);
+ l = prm_read_mod_reg(OCP_MOD, OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
if (l & 0x01)
- __raw_writel(0x01, OMAP24XX_PRCM_IRQSTATUS_MPU);
+ prm_write_mod_reg(0x01, OCP_MOD,
+ OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
if (l & 0x20)
- __raw_writel(0x20, OMAP24XX_PRCM_IRQSTATUS_MPU);
+ prm_write_mod_reg(0x20, OCP_MOD,
+ OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
/* Mask future PRCM-to-MPU interrupts */
- __raw_writel(0x0, OMAP24XX_PRCM_IRQSTATUS_MPU);
+ prm_write_mod_reg(0x0, OCP_MOD, OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
}
static int omap2_i2c_active(void)
static void omap2_enter_mpu_retention(void)
{
- u32 sleep_time = 0;
int only_idle = 0;
+ struct timespec ts_preidle, ts_postidle, ts_idle;
/* Putting MPU into the WFI state while a transfer is active
* seems to cause the I2C block to timeout. Why? Good question. */
if (omap2_pm_debug) {
omap2_pm_dump(only_idle ? 2 : 1, 0, 0);
- sleep_time = omap2_read_32k_sync_counter();
+ getnstimeofday(&ts_preidle);
}
omap2_sram_idle();
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(only_idle ? 2 : 1, 1, tmp / 32768);
+ getnstimeofday(&ts_postidle);
+ ts_idle = timespec_sub(ts_postidle, ts_preidle);
+ tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC;
+ omap2_pm_dump(only_idle ? 2 : 1, 1, tmp);
}
}
return 0;
if (atomic_read(&sleep_block) > 0)
return 0;
- if (clk_get_usecount(osc_ck) > 1)
+ if (osc_ck->usecount > 1)
return 0;
if (omap_dma_running())
return 0;
return 1;
}
+/*
+ * Note that you can use clock_event_device->min_delta_ns if you want to
+ * avoid reprogramming timer too often when using CONFIG_NO_HZ.
+ */
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;
- }
+ if (!atomic_read(&sleep_block) && omap_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.
- */
- timer_dyn_reprogram();
-
- if (omap2_irq_pending())
+ if (omap_irq_pending())
goto out;
omap2_enter_full_retention();
mir1 = omap_readl(0x480fe0a4);
omap_writel(1 << 5, 0x480fe0ac);
+ omap_uart_prepare_suspend();
omap2_enter_full_retention();
omap_writel(mir1, 0x480fe0a4);
.valid = suspend_valid_only_mem,
};
+static int _pm_clkdm_enable_hwsup(struct clockdomain *clkdm)
+{
+ omap2_clkdm_allow_idle(clkdm);
+ return 0;
+}
+
static void __init prcm_setup_regs(void)
{
- u32 l;
+ int i, num_mem_banks;
+ struct powerdomain *pwrdm;
/* Enable autoidle */
- __raw_writel(OMAP24XX_AUTOIDLE, OMAP24XX_PRCM_SYSCONFIG);
+ prm_write_mod_reg(OMAP24XX_AUTOIDLE, OCP_MOD,
+ OMAP24XX_PRM_SYSCONFIG_OFFSET);
/* Set all domain wakeup dependencies */
prm_write_mod_reg(OMAP_EN_WKUP_MASK, MPU_MOD, PM_WKDEP);
if (cpu_is_omap2430())
prm_write_mod_reg(0, OMAP2430_MDM_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_MASK, MPU_MOD, CM_CLKSTCTRL);
- cm_write_mod_reg(OMAP24XX_AUTOSTATE_DSS_MASK |
- OMAP24XX_AUTOSTATE_L4_MASK |
- OMAP24XX_AUTOSTATE_L3_MASK,
- CORE_MOD, CM_CLKSTCTRL);
- cm_write_mod_reg(OMAP24XX_AUTOSTATE_GFX_MASK, GFX_MOD, CM_CLKSTCTRL);
- cm_write_mod_reg(OMAP2420_AUTOSTATE_IVA_MASK |
- OMAP24XX_AUTOSTATE_DSP_MASK,
- OMAP24XX_DSP_MOD, CM_CLKSTCTRL);
+ /*
+ * Set CORE powerdomain memory banks to retain their contents
+ * during RETENTION
+ */
+ num_mem_banks = pwrdm_get_mem_bank_count(core_pwrdm);
+ for (i = 0; i < num_mem_banks; i++)
+ pwrdm_set_mem_retst(core_pwrdm, i, PWRDM_POWER_RET);
+
+ /* Set CORE powerdomain's next power state to RETENTION */
+ pwrdm_set_next_pwrst(core_pwrdm, PWRDM_POWER_RET);
+
+ /*
+ * Set MPU powerdomain's next power state to RETENTION;
+ * preserve logic state during retention
+ */
+ pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET);
+ pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET);
+
+ /* Force-power down DSP, GFX powerdomains */
+
+ pwrdm = clkdm_get_pwrdm(dsp_clkdm);
+ pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF);
+ omap2_clkdm_sleep(dsp_clkdm);
+
+ pwrdm = clkdm_get_pwrdm(gfx_clkdm);
+ pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF);
+ omap2_clkdm_sleep(gfx_clkdm);
+
+ /* Enable clockdomain hardware-supervised control for all clkdms */
+ clkdm_for_each(_pm_clkdm_enable_hwsup);
/* Enable clock autoidle for all domains */
cm_write_mod_reg(OMAP24XX_AUTO_CAM |
/* REVISIT: Configure number of 32 kHz clock cycles for sys_clk
* stabilisation */
- __raw_writel(15 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_PRCM_CLKSSETUP);
+ prm_write_mod_reg(15 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD,
+ OMAP24XX_PRCM_CLKSSETUP_OFFSET);
/* Configure automatic voltage transition */
- __raw_writel(2 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_PRCM_VOLTSETUP);
- __raw_writel(OMAP24XX_AUTO_EXTVOLT |
+ prm_write_mod_reg(2 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD,
+ OMAP24XX_PRCM_VOLTSETUP_OFFSET);
+ prm_write_mod_reg(OMAP24XX_AUTO_EXTVOLT |
(0x1 << OMAP24XX_SETOFF_LEVEL_SHIFT) |
OMAP24XX_MEMRETCTRL |
(0x1 << OMAP24XX_SETRET_LEVEL_SHIFT) |
(0x0 << OMAP24XX_VOLT_LEVEL_SHIFT),
- OMAP24XX_PRCM_VOLTCTRL);
+ OMAP24XX_GR_MOD, OMAP24XX_PRCM_VOLTCTRL_OFFSET);
/* Enable wake-up events */
prm_write_mod_reg(OMAP24XX_EN_GPIOS | OMAP24XX_EN_GPT1,
WKUP_MOD, PM_WKEN);
}
-static int __init omap2_pm_init(void)
+int __init omap2_pm_init(void)
{
u32 l;
- int error;
printk(KERN_INFO "Power Management for OMAP2 initializing\n");
- l = __raw_readl(OMAP24XX_PRCM_REVISION);
+ l = prm_read_mod_reg(OCP_MOD, OMAP24XX_PRM_REVISION_OFFSET);
printk(KERN_INFO "PRCM revision %d.%d\n", (l >> 4) & 0x0f, l & 0x0f);
+ /* Look up important powerdomains, clockdomains */
+
+ mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
+ if (!mpu_pwrdm)
+ pr_err("PM: mpu_pwrdm not found\n");
+
+ core_pwrdm = pwrdm_lookup("core_pwrdm");
+ if (!core_pwrdm)
+ pr_err("PM: core_pwrdm not found\n");
+
+ dsp_clkdm = clkdm_lookup("dsp_clkdm");
+ if (!dsp_clkdm)
+ pr_err("PM: mpu_clkdm not found\n");
+
+ gfx_clkdm = clkdm_lookup("gfx_clkdm");
+ if (!gfx_clkdm)
+ pr_err("PM: gfx_clkdm not found\n");
+
+
osc_ck = clk_get(NULL, "osc_ck");
if (IS_ERR(osc_ck)) {
printk(KERN_ERR "could not get osc_ck\n");
prcm_setup_regs();
- pm_init_serial_console();
-
/* Hack to prevent MPU retention when STI console is enabled. */
{
const struct omap_sti_console_config *sti;
* These routines need to be in SRAM as that's the only
* memory the MPU can see when it wakes up.
*/
- 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);
+ if (cpu_is_omap24xx()) {
+ omap2_sram_idle = omap_sram_push(omap24xx_idle_loop_suspend,
+ omap24xx_idle_loop_suspend_sz);
- /* Patch in the correct register addresses for multiboot */
- omap_sram_patch_va(omap24xx_cpu_suspend, &omap2_ocs_sdrc_power,
- omap2_sram_suspend,
- OMAP_SDRC_REGADDR(SDRC_POWER));
- omap_sram_patch_va(omap24xx_cpu_suspend, &omap2_ocs_sdrc_dlla_ctrl,
- omap2_sram_suspend,
- OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL));
+ omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend,
+ omap24xx_cpu_suspend_sz);
+ }
suspend_set_ops(&omap_pm_ops);
pm_idle = omap2_pm_idle;
- error = sysfs_create_file(power_kobj, &sleep_while_idle_attr.attr);
- if (error)
- printk(KERN_ERR "sysfs_create_file failed: %d\n", error);
-
return 0;
}
-
-late_initcall(omap2_pm_init);
projects / linux-2.6-omap-h63xx.git / blobdiff