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-rw-r--r--arch/arm/mach-omap2/pm34xx.c710
1 files changed, 710 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
new file mode 100644
index 00000000000..841d4c5ed8b
--- /dev/null
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -0,0 +1,710 @@
+/*
+ * OMAP3 Power Management Routines
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation
+ * Tony Lindgren <tony@atomide.com>
+ * Jouni Hogander
+ *
+ * Copyright (C) 2005 Texas Instruments, Inc.
+ * Richard Woodruff <r-woodruff2@ti.com>
+ *
+ * Based on pm.c for omap1
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/pm.h>
+#include <linux/suspend.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+
+#include <mach/sram.h>
+#include <mach/clockdomain.h>
+#include <mach/powerdomain.h>
+#include <mach/control.h>
+#include <mach/serial.h>
+
+#include "cm.h"
+#include "cm-regbits-34xx.h"
+#include "prm-regbits-34xx.h"
+
+#include "prm.h"
+#include "pm.h"
+
+struct power_state {
+ struct powerdomain *pwrdm;
+ u32 next_state;
+ u32 saved_state;
+ struct list_head node;
+};
+
+static LIST_HEAD(pwrst_list);
+
+static void (*_omap_sram_idle)(u32 *addr, int save_state);
+
+static struct powerdomain *mpu_pwrdm;
+
+/* PRCM Interrupt Handler for wakeups */
+static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
+{
+ u32 wkst, irqstatus_mpu;
+ u32 fclk, iclk;
+
+ /* WKUP */
+ wkst = prm_read_mod_reg(WKUP_MOD, PM_WKST);
+ if (wkst) {
+ iclk = cm_read_mod_reg(WKUP_MOD, CM_ICLKEN);
+ fclk = cm_read_mod_reg(WKUP_MOD, CM_FCLKEN);
+ cm_set_mod_reg_bits(wkst, WKUP_MOD, CM_ICLKEN);
+ cm_set_mod_reg_bits(wkst, WKUP_MOD, CM_FCLKEN);
+ prm_write_mod_reg(wkst, WKUP_MOD, PM_WKST);
+ while (prm_read_mod_reg(WKUP_MOD, PM_WKST))
+ cpu_relax();
+ cm_write_mod_reg(iclk, WKUP_MOD, CM_ICLKEN);
+ cm_write_mod_reg(fclk, WKUP_MOD, CM_FCLKEN);
+ }
+
+ /* CORE */
+ wkst = prm_read_mod_reg(CORE_MOD, PM_WKST1);
+ if (wkst) {
+ iclk = cm_read_mod_reg(CORE_MOD, CM_ICLKEN1);
+ fclk = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
+ cm_set_mod_reg_bits(wkst, CORE_MOD, CM_ICLKEN1);
+ cm_set_mod_reg_bits(wkst, CORE_MOD, CM_FCLKEN1);
+ prm_write_mod_reg(wkst, CORE_MOD, PM_WKST1);
+ while (prm_read_mod_reg(CORE_MOD, PM_WKST1))
+ cpu_relax();
+ cm_write_mod_reg(iclk, CORE_MOD, CM_ICLKEN1);
+ cm_write_mod_reg(fclk, CORE_MOD, CM_FCLKEN1);
+ }
+ wkst = prm_read_mod_reg(CORE_MOD, OMAP3430ES2_PM_WKST3);
+ if (wkst) {
+ iclk = cm_read_mod_reg(CORE_MOD, CM_ICLKEN3);
+ fclk = cm_read_mod_reg(CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
+ cm_set_mod_reg_bits(wkst, CORE_MOD, CM_ICLKEN3);
+ cm_set_mod_reg_bits(wkst, CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
+ prm_write_mod_reg(wkst, CORE_MOD, OMAP3430ES2_PM_WKST3);
+ while (prm_read_mod_reg(CORE_MOD, OMAP3430ES2_PM_WKST3))
+ cpu_relax();
+ cm_write_mod_reg(iclk, CORE_MOD, CM_ICLKEN3);
+ cm_write_mod_reg(fclk, CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
+ }
+
+ /* PER */
+ wkst = prm_read_mod_reg(OMAP3430_PER_MOD, PM_WKST);
+ if (wkst) {
+ iclk = cm_read_mod_reg(OMAP3430_PER_MOD, CM_ICLKEN);
+ fclk = cm_read_mod_reg(OMAP3430_PER_MOD, CM_FCLKEN);
+ cm_set_mod_reg_bits(wkst, OMAP3430_PER_MOD, CM_ICLKEN);
+ cm_set_mod_reg_bits(wkst, OMAP3430_PER_MOD, CM_FCLKEN);
+ prm_write_mod_reg(wkst, OMAP3430_PER_MOD, PM_WKST);
+ while (prm_read_mod_reg(OMAP3430_PER_MOD, PM_WKST))
+ cpu_relax();
+ cm_write_mod_reg(iclk, OMAP3430_PER_MOD, CM_ICLKEN);
+ cm_write_mod_reg(fclk, OMAP3430_PER_MOD, CM_FCLKEN);
+ }
+
+ if (omap_rev() > OMAP3430_REV_ES1_0) {
+ /* USBHOST */
+ wkst = prm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, PM_WKST);
+ if (wkst) {
+ iclk = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
+ CM_ICLKEN);
+ fclk = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
+ CM_FCLKEN);
+ cm_set_mod_reg_bits(wkst, OMAP3430ES2_USBHOST_MOD,
+ CM_ICLKEN);
+ cm_set_mod_reg_bits(wkst, OMAP3430ES2_USBHOST_MOD,
+ CM_FCLKEN);
+ prm_write_mod_reg(wkst, OMAP3430ES2_USBHOST_MOD,
+ PM_WKST);
+ while (prm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
+ PM_WKST))
+ cpu_relax();
+ cm_write_mod_reg(iclk, OMAP3430ES2_USBHOST_MOD,
+ CM_ICLKEN);
+ cm_write_mod_reg(fclk, OMAP3430ES2_USBHOST_MOD,
+ CM_FCLKEN);
+ }
+ }
+
+ irqstatus_mpu = prm_read_mod_reg(OCP_MOD,
+ OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+ prm_write_mod_reg(irqstatus_mpu, OCP_MOD,
+ OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+
+ while (prm_read_mod_reg(OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET))
+ cpu_relax();
+
+ return IRQ_HANDLED;
+}
+
+static void omap_sram_idle(void)
+{
+ /* Variable to tell what needs to be saved and restored
+ * in omap_sram_idle*/
+ /* save_state = 0 => Nothing to save and restored */
+ /* save_state = 1 => Only L1 and logic lost */
+ /* save_state = 2 => Only L2 lost */
+ /* save_state = 3 => L1, L2 and logic lost */
+ int save_state = 0, mpu_next_state;
+
+ if (!_omap_sram_idle)
+ return;
+
+ mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm);
+ switch (mpu_next_state) {
+ case PWRDM_POWER_RET:
+ /* No need to save context */
+ save_state = 0;
+ break;
+ default:
+ /* Invalid state */
+ printk(KERN_ERR "Invalid mpu state in sram_idle\n");
+ return;
+ }
+ omap2_gpio_prepare_for_retention();
+ omap_uart_prepare_idle(0);
+ omap_uart_prepare_idle(1);
+ omap_uart_prepare_idle(2);
+
+ _omap_sram_idle(NULL, save_state);
+ cpu_init();
+
+ omap_uart_resume_idle(2);
+ omap_uart_resume_idle(1);
+ omap_uart_resume_idle(0);
+ omap2_gpio_resume_after_retention();
+}
+
+/*
+ * Check if functional clocks are enabled before entering
+ * sleep. This function could be behind CONFIG_PM_DEBUG
+ * when all drivers are configuring their sysconfig registers
+ * properly and using their clocks properly.
+ */
+static int omap3_fclks_active(void)
+{
+ u32 fck_core1 = 0, fck_core3 = 0, fck_sgx = 0, fck_dss = 0,
+ fck_cam = 0, fck_per = 0, fck_usbhost = 0;
+
+ fck_core1 = cm_read_mod_reg(CORE_MOD,
+ CM_FCLKEN1);
+ if (omap_rev() > OMAP3430_REV_ES1_0) {
+ fck_core3 = cm_read_mod_reg(CORE_MOD,
+ OMAP3430ES2_CM_FCLKEN3);
+ fck_sgx = cm_read_mod_reg(OMAP3430ES2_SGX_MOD,
+ CM_FCLKEN);
+ fck_usbhost = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
+ CM_FCLKEN);
+ } else
+ fck_sgx = cm_read_mod_reg(GFX_MOD,
+ OMAP3430ES2_CM_FCLKEN3);
+ fck_dss = cm_read_mod_reg(OMAP3430_DSS_MOD,
+ CM_FCLKEN);
+ fck_cam = cm_read_mod_reg(OMAP3430_CAM_MOD,
+ CM_FCLKEN);
+ fck_per = cm_read_mod_reg(OMAP3430_PER_MOD,
+ CM_FCLKEN);
+
+ /* Ignore UART clocks. These are handled by UART core (serial.c) */
+ fck_core1 &= ~(OMAP3430_EN_UART1 | OMAP3430_EN_UART2);
+ fck_per &= ~OMAP3430_EN_UART3;
+
+ if (fck_core1 | fck_core3 | fck_sgx | fck_dss |
+ fck_cam | fck_per | fck_usbhost)
+ return 1;
+ return 0;
+}
+
+static int omap3_can_sleep(void)
+{
+ if (!omap_uart_can_sleep())
+ return 0;
+ if (omap3_fclks_active())
+ return 0;
+ return 1;
+}
+
+/* This sets pwrdm state (other than mpu & core. Currently only ON &
+ * RET are supported. Function is assuming that clkdm doesn't have
+ * hw_sup mode enabled. */
+static int set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
+{
+ u32 cur_state;
+ int sleep_switch = 0;
+ int ret = 0;
+
+ if (pwrdm == NULL || IS_ERR(pwrdm))
+ return -EINVAL;
+
+ while (!(pwrdm->pwrsts & (1 << state))) {
+ if (state == PWRDM_POWER_OFF)
+ return ret;
+ state--;
+ }
+
+ cur_state = pwrdm_read_next_pwrst(pwrdm);
+ if (cur_state == state)
+ return ret;
+
+ if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) {
+ omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]);
+ sleep_switch = 1;
+ pwrdm_wait_transition(pwrdm);
+ }
+
+ ret = pwrdm_set_next_pwrst(pwrdm, state);
+ if (ret) {
+ printk(KERN_ERR "Unable to set state of powerdomain: %s\n",
+ pwrdm->name);
+ goto err;
+ }
+
+ if (sleep_switch) {
+ omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]);
+ pwrdm_wait_transition(pwrdm);
+ }
+
+err:
+ return ret;
+}
+
+static void omap3_pm_idle(void)
+{
+ local_irq_disable();
+ local_fiq_disable();
+
+ if (!omap3_can_sleep())
+ goto out;
+
+ if (omap_irq_pending())
+ goto out;
+
+ omap_sram_idle();
+
+out:
+ local_fiq_enable();
+ local_irq_enable();
+}
+
+static int omap3_pm_prepare(void)
+{
+ disable_hlt();
+ return 0;
+}
+
+static int omap3_pm_suspend(void)
+{
+ struct power_state *pwrst;
+ int state, ret = 0;
+
+ /* Read current next_pwrsts */
+ list_for_each_entry(pwrst, &pwrst_list, node)
+ pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);
+ /* Set ones wanted by suspend */
+ list_for_each_entry(pwrst, &pwrst_list, node) {
+ if (set_pwrdm_state(pwrst->pwrdm, pwrst->next_state))
+ goto restore;
+ if (pwrdm_clear_all_prev_pwrst(pwrst->pwrdm))
+ goto restore;
+ }
+
+ omap_uart_prepare_suspend();
+ omap_sram_idle();
+
+restore:
+ /* Restore next_pwrsts */
+ list_for_each_entry(pwrst, &pwrst_list, node) {
+ set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state);
+ state = pwrdm_read_prev_pwrst(pwrst->pwrdm);
+ if (state > pwrst->next_state) {
+ printk(KERN_INFO "Powerdomain (%s) didn't enter "
+ "target state %d\n",
+ pwrst->pwrdm->name, pwrst->next_state);
+ ret = -1;
+ }
+ }
+ if (ret)
+ printk(KERN_ERR "Could not enter target state in pm_suspend\n");
+ else
+ printk(KERN_INFO "Successfully put all powerdomains "
+ "to target state\n");
+
+ return ret;
+}
+
+static int omap3_pm_enter(suspend_state_t state)
+{
+ int ret = 0;
+
+ switch (state) {
+ case PM_SUSPEND_STANDBY:
+ case PM_SUSPEND_MEM:
+ ret = omap3_pm_suspend();
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static void omap3_pm_finish(void)
+{
+ enable_hlt();
+}
+
+static struct platform_suspend_ops omap_pm_ops = {
+ .prepare = omap3_pm_prepare,
+ .enter = omap3_pm_enter,
+ .finish = omap3_pm_finish,
+ .valid = suspend_valid_only_mem,
+};
+
+
+/**
+ * omap3_iva_idle(): ensure IVA is in idle so it can be put into
+ * retention
+ *
+ * In cases where IVA2 is activated by bootcode, it may prevent
+ * full-chip retention or off-mode because it is not idle. This
+ * function forces the IVA2 into idle state so it can go
+ * into retention/off and thus allow full-chip retention/off.
+ *
+ **/
+static void __init omap3_iva_idle(void)
+{
+ /* ensure IVA2 clock is disabled */
+ cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+ /* if no clock activity, nothing else to do */
+ if (!(cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &
+ OMAP3430_CLKACTIVITY_IVA2_MASK))
+ return;
+
+ /* Reset IVA2 */
+ prm_write_mod_reg(OMAP3430_RST1_IVA2 |
+ OMAP3430_RST2_IVA2 |
+ OMAP3430_RST3_IVA2,
+ OMAP3430_IVA2_MOD, RM_RSTCTRL);
+
+ /* Enable IVA2 clock */
+ cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2,
+ OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+ /* Set IVA2 boot mode to 'idle' */
+ omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
+ OMAP343X_CONTROL_IVA2_BOOTMOD);
+
+ /* Un-reset IVA2 */
+ prm_write_mod_reg(0, OMAP3430_IVA2_MOD, RM_RSTCTRL);
+
+ /* Disable IVA2 clock */
+ cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+ /* Reset IVA2 */
+ prm_write_mod_reg(OMAP3430_RST1_IVA2 |
+ OMAP3430_RST2_IVA2 |
+ OMAP3430_RST3_IVA2,
+ OMAP3430_IVA2_MOD, RM_RSTCTRL);
+}
+
+static void __init omap3_d2d_idle(void)
+{
+ u16 mask, padconf;
+
+ /* In a stand alone OMAP3430 where there is not a stacked
+ * modem for the D2D Idle Ack and D2D MStandby must be pulled
+ * high. S CONTROL_PADCONF_SAD2D_IDLEACK and
+ * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up. */
+ mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
+ padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
+ padconf |= mask;
+ omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
+
+ padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
+ padconf |= mask;
+ omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
+
+ /* reset modem */
+ prm_write_mod_reg(OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON |
+ OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST,
+ CORE_MOD, RM_RSTCTRL);
+ prm_write_mod_reg(0, CORE_MOD, RM_RSTCTRL);
+}
+
+static void __init prcm_setup_regs(void)
+{
+ /* XXX Reset all wkdeps. This should be done when initializing
+ * powerdomains */
+ prm_write_mod_reg(0, OMAP3430_IVA2_MOD, PM_WKDEP);
+ prm_write_mod_reg(0, MPU_MOD, PM_WKDEP);
+ prm_write_mod_reg(0, OMAP3430_DSS_MOD, PM_WKDEP);
+ prm_write_mod_reg(0, OMAP3430_NEON_MOD, PM_WKDEP);
+ prm_write_mod_reg(0, OMAP3430_CAM_MOD, PM_WKDEP);
+ prm_write_mod_reg(0, OMAP3430_PER_MOD, PM_WKDEP);
+ if (omap_rev() > OMAP3430_REV_ES1_0) {
+ prm_write_mod_reg(0, OMAP3430ES2_SGX_MOD, PM_WKDEP);
+ prm_write_mod_reg(0, OMAP3430ES2_USBHOST_MOD, PM_WKDEP);
+ } else
+ prm_write_mod_reg(0, GFX_MOD, PM_WKDEP);
+
+ /*
+ * Enable interface clock autoidle for all modules.
+ * Note that in the long run this should be done by clockfw
+ */
+ cm_write_mod_reg(
+ OMAP3430_AUTO_MODEM |
+ OMAP3430ES2_AUTO_MMC3 |
+ OMAP3430ES2_AUTO_ICR |
+ OMAP3430_AUTO_AES2 |
+ OMAP3430_AUTO_SHA12 |
+ OMAP3430_AUTO_DES2 |
+ OMAP3430_AUTO_MMC2 |
+ OMAP3430_AUTO_MMC1 |
+ OMAP3430_AUTO_MSPRO |
+ OMAP3430_AUTO_HDQ |
+ OMAP3430_AUTO_MCSPI4 |
+ OMAP3430_AUTO_MCSPI3 |
+ OMAP3430_AUTO_MCSPI2 |
+ OMAP3430_AUTO_MCSPI1 |
+ OMAP3430_AUTO_I2C3 |
+ OMAP3430_AUTO_I2C2 |
+ OMAP3430_AUTO_I2C1 |
+ OMAP3430_AUTO_UART2 |
+ OMAP3430_AUTO_UART1 |
+ OMAP3430_AUTO_GPT11 |
+ OMAP3430_AUTO_GPT10 |
+ OMAP3430_AUTO_MCBSP5 |
+ OMAP3430_AUTO_MCBSP1 |
+ OMAP3430ES1_AUTO_FAC | /* This is es1 only */
+ OMAP3430_AUTO_MAILBOXES |
+ OMAP3430_AUTO_OMAPCTRL |
+ OMAP3430ES1_AUTO_FSHOSTUSB |
+ OMAP3430_AUTO_HSOTGUSB |
+ OMAP3430_AUTO_SAD2D |
+ OMAP3430_AUTO_SSI,
+ CORE_MOD, CM_AUTOIDLE1);
+
+ cm_write_mod_reg(
+ OMAP3430_AUTO_PKA |
+ OMAP3430_AUTO_AES1 |
+ OMAP3430_AUTO_RNG |
+ OMAP3430_AUTO_SHA11 |
+ OMAP3430_AUTO_DES1,
+ CORE_MOD, CM_AUTOIDLE2);
+
+ if (omap_rev() > OMAP3430_REV_ES1_0) {
+ cm_write_mod_reg(
+ OMAP3430_AUTO_MAD2D |
+ OMAP3430ES2_AUTO_USBTLL,
+ CORE_MOD, CM_AUTOIDLE3);
+ }
+
+ cm_write_mod_reg(
+ OMAP3430_AUTO_WDT2 |
+ OMAP3430_AUTO_WDT1 |
+ OMAP3430_AUTO_GPIO1 |
+ OMAP3430_AUTO_32KSYNC |
+ OMAP3430_AUTO_GPT12 |
+ OMAP3430_AUTO_GPT1 ,
+ WKUP_MOD, CM_AUTOIDLE);
+
+ cm_write_mod_reg(
+ OMAP3430_AUTO_DSS,
+ OMAP3430_DSS_MOD,
+ CM_AUTOIDLE);
+
+ cm_write_mod_reg(
+ OMAP3430_AUTO_CAM,
+ OMAP3430_CAM_MOD,
+ CM_AUTOIDLE);
+
+ cm_write_mod_reg(
+ OMAP3430_AUTO_GPIO6 |
+ OMAP3430_AUTO_GPIO5 |
+ OMAP3430_AUTO_GPIO4 |
+ OMAP3430_AUTO_GPIO3 |
+ OMAP3430_AUTO_GPIO2 |
+ OMAP3430_AUTO_WDT3 |
+ OMAP3430_AUTO_UART3 |
+ OMAP3430_AUTO_GPT9 |
+ OMAP3430_AUTO_GPT8 |
+ OMAP3430_AUTO_GPT7 |
+ OMAP3430_AUTO_GPT6 |
+ OMAP3430_AUTO_GPT5 |
+ OMAP3430_AUTO_GPT4 |
+ OMAP3430_AUTO_GPT3 |
+ OMAP3430_AUTO_GPT2 |
+ OMAP3430_AUTO_MCBSP4 |
+ OMAP3430_AUTO_MCBSP3 |
+ OMAP3430_AUTO_MCBSP2,
+ OMAP3430_PER_MOD,
+ CM_AUTOIDLE);
+
+ if (omap_rev() > OMAP3430_REV_ES1_0) {
+ cm_write_mod_reg(
+ OMAP3430ES2_AUTO_USBHOST,
+ OMAP3430ES2_USBHOST_MOD,
+ CM_AUTOIDLE);
+ }
+
+ /*
+ * Set all plls to autoidle. This is needed until autoidle is
+ * enabled by clockfw
+ */
+ cm_write_mod_reg(1 << OMAP3430_AUTO_IVA2_DPLL_SHIFT,
+ OMAP3430_IVA2_MOD, CM_AUTOIDLE2);
+ cm_write_mod_reg(1 << OMAP3430_AUTO_MPU_DPLL_SHIFT,
+ MPU_MOD,
+ CM_AUTOIDLE2);
+ cm_write_mod_reg((1 << OMAP3430_AUTO_PERIPH_DPLL_SHIFT) |
+ (1 << OMAP3430_AUTO_CORE_DPLL_SHIFT),
+ PLL_MOD,
+ CM_AUTOIDLE);
+ cm_write_mod_reg(1 << OMAP3430ES2_AUTO_PERIPH2_DPLL_SHIFT,
+ PLL_MOD,
+ CM_AUTOIDLE2);
+
+ /*
+ * Enable control of expternal oscillator through
+ * sys_clkreq. In the long run clock framework should
+ * take care of this.
+ */
+ prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK,
+ 1 << OMAP_AUTOEXTCLKMODE_SHIFT,
+ OMAP3430_GR_MOD,
+ OMAP3_PRM_CLKSRC_CTRL_OFFSET);
+
+ /* setup wakup source */
+ prm_write_mod_reg(OMAP3430_EN_IO | OMAP3430_EN_GPIO1 |
+ OMAP3430_EN_GPT1 | OMAP3430_EN_GPT12,
+ WKUP_MOD, PM_WKEN);
+ /* No need to write EN_IO, that is always enabled */
+ prm_write_mod_reg(OMAP3430_EN_GPIO1 | OMAP3430_EN_GPT1 |
+ OMAP3430_EN_GPT12,
+ WKUP_MOD, OMAP3430_PM_MPUGRPSEL);
+ /* For some reason IO doesn't generate wakeup event even if
+ * it is selected to mpu wakeup goup */
+ prm_write_mod_reg(OMAP3430_IO_EN | OMAP3430_WKUP_EN,
+ OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
+
+ /* Don't attach IVA interrupts */
+ prm_write_mod_reg(0, WKUP_MOD, OMAP3430_PM_IVAGRPSEL);
+ prm_write_mod_reg(0, CORE_MOD, OMAP3430_PM_IVAGRPSEL1);
+ prm_write_mod_reg(0, CORE_MOD, OMAP3430ES2_PM_IVAGRPSEL3);
+ prm_write_mod_reg(0, OMAP3430_PER_MOD, OMAP3430_PM_IVAGRPSEL);
+
+ /* Clear any pending 'reset' flags */
+ prm_write_mod_reg(0xffffffff, MPU_MOD, RM_RSTST);
+ prm_write_mod_reg(0xffffffff, CORE_MOD, RM_RSTST);
+ prm_write_mod_reg(0xffffffff, OMAP3430_PER_MOD, RM_RSTST);
+ prm_write_mod_reg(0xffffffff, OMAP3430_EMU_MOD, RM_RSTST);
+ prm_write_mod_reg(0xffffffff, OMAP3430_NEON_MOD, RM_RSTST);
+ prm_write_mod_reg(0xffffffff, OMAP3430_DSS_MOD, RM_RSTST);
+ prm_write_mod_reg(0xffffffff, OMAP3430ES2_USBHOST_MOD, RM_RSTST);
+
+ /* Clear any pending PRCM interrupts */
+ prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+
+ omap3_iva_idle();
+ omap3_d2d_idle();
+}
+
+static int __init pwrdms_setup(struct powerdomain *pwrdm)
+{
+ struct power_state *pwrst;
+
+ if (!pwrdm->pwrsts)
+ return 0;
+
+ pwrst = kmalloc(sizeof(struct power_state), GFP_KERNEL);
+ if (!pwrst)
+ return -ENOMEM;
+ pwrst->pwrdm = pwrdm;
+ pwrst->next_state = PWRDM_POWER_RET;
+ list_add(&pwrst->node, &pwrst_list);
+
+ if (pwrdm_has_hdwr_sar(pwrdm))
+ pwrdm_enable_hdwr_sar(pwrdm);
+
+ return set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
+}
+
+/*
+ * Enable hw supervised mode for all clockdomains if it's
+ * supported. Initiate sleep transition for other clockdomains, if
+ * they are not used
+ */
+static int __init clkdms_setup(struct clockdomain *clkdm)
+{
+ if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO)
+ omap2_clkdm_allow_idle(clkdm);
+ else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP &&
+ atomic_read(&clkdm->usecount) == 0)
+ omap2_clkdm_sleep(clkdm);
+ return 0;
+}
+
+int __init omap3_pm_init(void)
+{
+ struct power_state *pwrst, *tmp;
+ int ret;
+
+ if (!cpu_is_omap34xx())
+ return -ENODEV;
+
+ printk(KERN_ERR "Power Management for TI OMAP3.\n");
+
+ /* XXX prcm_setup_regs needs to be before enabling hw
+ * supervised mode for powerdomains */
+ prcm_setup_regs();
+
+ ret = request_irq(INT_34XX_PRCM_MPU_IRQ,
+ (irq_handler_t)prcm_interrupt_handler,
+ IRQF_DISABLED, "prcm", NULL);
+ if (ret) {
+ printk(KERN_ERR "request_irq failed to register for 0x%x\n",
+ INT_34XX_PRCM_MPU_IRQ);
+ goto err1;
+ }
+
+ ret = pwrdm_for_each(pwrdms_setup);
+ if (ret) {
+ printk(KERN_ERR "Failed to setup powerdomains\n");
+ goto err2;
+ }
+
+ (void) clkdm_for_each(clkdms_setup);
+
+ mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
+ if (mpu_pwrdm == NULL) {
+ printk(KERN_ERR "Failed to get mpu_pwrdm\n");
+ goto err2;
+ }
+
+ _omap_sram_idle = omap_sram_push(omap34xx_cpu_suspend,
+ omap34xx_cpu_suspend_sz);
+
+ suspend_set_ops(&omap_pm_ops);
+
+ pm_idle = omap3_pm_idle;
+
+err1:
+ return ret;
+err2:
+ free_irq(INT_34XX_PRCM_MPU_IRQ, NULL);
+ list_for_each_entry_safe(pwrst, tmp, &pwrst_list, node) {
+ list_del(&pwrst->node);
+ kfree(pwrst);
+ }
+ return ret;
+}
+
+late_initcall(omap3_pm_init);