#include "prm2xxx_3xxx.h"
#include "cm2xxx_3xxx.h"
#include "prm-regbits-34xx.h"
+#include "cm3xxx.h"
+#include "cm-regbits-34xx.h"
static const struct omap_prcm_irq omap3_prcm_irqs[] = {
OMAP_PRCM_IRQ("wkup", 0, 0),
OMAP3_PRM_IRQENABLE_MPU_OFFSET);
}
+/**
+ * omap3xxx_prm_clear_mod_irqs - clear wake-up events from PRCM interrupt
+ * @module: PRM module to clear wakeups from
+ * @regs: register set to clear, 1 or 3
+ * @ignore_bits: wakeup status bits to ignore
+ *
+ * The purpose of this function is to clear any wake-up events latched
+ * in the PRCM PM_WKST_x registers. It is possible that a wake-up event
+ * may occur whilst attempting to clear a PM_WKST_x register and thus
+ * set another bit in this register. A while loop is used to ensure
+ * that any peripheral wake-up events occurring while attempting to
+ * clear the PM_WKST_x are detected and cleared.
+ */
+int omap3xxx_prm_clear_mod_irqs(s16 module, u8 regs, u32 ignore_bits)
+{
+ u32 wkst, fclk, iclk, clken;
+ u16 wkst_off = (regs == 3) ? OMAP3430ES2_PM_WKST3 : PM_WKST1;
+ u16 fclk_off = (regs == 3) ? OMAP3430ES2_CM_FCLKEN3 : CM_FCLKEN1;
+ u16 iclk_off = (regs == 3) ? CM_ICLKEN3 : CM_ICLKEN1;
+ u16 grpsel_off = (regs == 3) ?
+ OMAP3430ES2_PM_MPUGRPSEL3 : OMAP3430_PM_MPUGRPSEL;
+ int c = 0;
+
+ wkst = omap2_prm_read_mod_reg(module, wkst_off);
+ wkst &= omap2_prm_read_mod_reg(module, grpsel_off);
+ wkst &= ~ignore_bits;
+ if (wkst) {
+ iclk = omap2_cm_read_mod_reg(module, iclk_off);
+ fclk = omap2_cm_read_mod_reg(module, fclk_off);
+ while (wkst) {
+ clken = wkst;
+ omap2_cm_set_mod_reg_bits(clken, module, iclk_off);
+ /*
+ * For USBHOST, we don't know whether HOST1 or
+ * HOST2 woke us up, so enable both f-clocks
+ */
+ if (module == OMAP3430ES2_USBHOST_MOD)
+ clken |= 1 << OMAP3430ES2_EN_USBHOST2_SHIFT;
+ omap2_cm_set_mod_reg_bits(clken, module, fclk_off);
+ omap2_prm_write_mod_reg(wkst, module, wkst_off);
+ wkst = omap2_prm_read_mod_reg(module, wkst_off);
+ wkst &= ~ignore_bits;
+ c++;
+ }
+ omap2_cm_write_mod_reg(iclk, module, iclk_off);
+ omap2_cm_write_mod_reg(fclk, module, fclk_off);
+ }
+
+ return c;
+}
+
+/**
+ * omap3_prm_reset_modem - toggle reset signal for modem
+ *
+ * Toggles the reset signal to modem IP block. Required to allow
+ * OMAP3430 without stacked modem to idle properly.
+ */
+void __init omap3_prm_reset_modem(void)
+{
+ omap2_prm_write_mod_reg(
+ OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON_MASK |
+ OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST_MASK,
+ CORE_MOD, OMAP2_RM_RSTCTRL);
+ omap2_prm_write_mod_reg(0, CORE_MOD, OMAP2_RM_RSTCTRL);
+}
+
+/**
+ * omap3_prm_init_pm - initialize PM related registers for PRM
+ * @has_uart4: SoC has UART4
+ * @has_iva: SoC has IVA
+ *
+ * Initializes PRM registers for PM use. Called from PM init.
+ */
+void __init omap3_prm_init_pm(bool has_uart4, bool has_iva)
+{
+ u32 en_uart4_mask;
+ u32 grpsel_uart4_mask;
+
+ /*
+ * Enable control of expternal oscillator through
+ * sys_clkreq. In the long run clock framework should
+ * take care of this.
+ */
+ omap2_prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK,
+ 1 << OMAP_AUTOEXTCLKMODE_SHIFT,
+ OMAP3430_GR_MOD,
+ OMAP3_PRM_CLKSRC_CTRL_OFFSET);
+
+ /* setup wakup source */
+ omap2_prm_write_mod_reg(OMAP3430_EN_IO_MASK | OMAP3430_EN_GPIO1_MASK |
+ OMAP3430_EN_GPT1_MASK | OMAP3430_EN_GPT12_MASK,
+ WKUP_MOD, PM_WKEN);
+ /* No need to write EN_IO, that is always enabled */
+ omap2_prm_write_mod_reg(OMAP3430_GRPSEL_GPIO1_MASK |
+ OMAP3430_GRPSEL_GPT1_MASK |
+ OMAP3430_GRPSEL_GPT12_MASK,
+ WKUP_MOD, OMAP3430_PM_MPUGRPSEL);
+
+ /* Enable PM_WKEN to support DSS LPR */
+ omap2_prm_write_mod_reg(OMAP3430_PM_WKEN_DSS_EN_DSS_MASK,
+ OMAP3430_DSS_MOD, PM_WKEN);
+
+ if (has_uart4) {
+ en_uart4_mask = OMAP3630_EN_UART4_MASK;
+ grpsel_uart4_mask = OMAP3630_GRPSEL_UART4_MASK;
+ }
+
+ /* Enable wakeups in PER */
+ omap2_prm_write_mod_reg(en_uart4_mask |
+ OMAP3430_EN_GPIO2_MASK |
+ OMAP3430_EN_GPIO3_MASK |
+ OMAP3430_EN_GPIO4_MASK |
+ OMAP3430_EN_GPIO5_MASK |
+ OMAP3430_EN_GPIO6_MASK |
+ OMAP3430_EN_UART3_MASK |
+ OMAP3430_EN_MCBSP2_MASK |
+ OMAP3430_EN_MCBSP3_MASK |
+ OMAP3430_EN_MCBSP4_MASK,
+ OMAP3430_PER_MOD, PM_WKEN);
+
+ /* and allow them to wake up MPU */
+ omap2_prm_write_mod_reg(grpsel_uart4_mask |
+ OMAP3430_GRPSEL_GPIO2_MASK |
+ OMAP3430_GRPSEL_GPIO3_MASK |
+ OMAP3430_GRPSEL_GPIO4_MASK |
+ OMAP3430_GRPSEL_GPIO5_MASK |
+ OMAP3430_GRPSEL_GPIO6_MASK |
+ OMAP3430_GRPSEL_UART3_MASK |
+ OMAP3430_GRPSEL_MCBSP2_MASK |
+ OMAP3430_GRPSEL_MCBSP3_MASK |
+ OMAP3430_GRPSEL_MCBSP4_MASK,
+ OMAP3430_PER_MOD, OMAP3430_PM_MPUGRPSEL);
+
+ /* Don't attach IVA interrupts */
+ if (has_iva) {
+ omap2_prm_write_mod_reg(0, WKUP_MOD, OMAP3430_PM_IVAGRPSEL);
+ omap2_prm_write_mod_reg(0, CORE_MOD, OMAP3430_PM_IVAGRPSEL1);
+ omap2_prm_write_mod_reg(0, CORE_MOD, OMAP3430ES2_PM_IVAGRPSEL3);
+ omap2_prm_write_mod_reg(0, OMAP3430_PER_MOD,
+ OMAP3430_PM_IVAGRPSEL);
+ }
+
+ /* Clear any pending 'reset' flags */
+ omap2_prm_write_mod_reg(0xffffffff, MPU_MOD, OMAP2_RM_RSTST);
+ omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP2_RM_RSTST);
+ omap2_prm_write_mod_reg(0xffffffff, OMAP3430_PER_MOD, OMAP2_RM_RSTST);
+ omap2_prm_write_mod_reg(0xffffffff, OMAP3430_EMU_MOD, OMAP2_RM_RSTST);
+ omap2_prm_write_mod_reg(0xffffffff, OMAP3430_NEON_MOD, OMAP2_RM_RSTST);
+ omap2_prm_write_mod_reg(0xffffffff, OMAP3430_DSS_MOD, OMAP2_RM_RSTST);
+ omap2_prm_write_mod_reg(0xffffffff, OMAP3430ES2_USBHOST_MOD,
+ OMAP2_RM_RSTST);
+
+ /* Clear any pending PRCM interrupts */
+ omap2_prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+
+ /* We need to idle iva2_pwrdm even on am3703 with no iva2. */
+ omap3xxx_prm_iva_idle();
+
+ omap3_prm_reset_modem();
+}
+
/**
* omap3xxx_prm_reconfigure_io_chain - clear latches and reconfigure I/O chain
*
return r;
}
+/**
+ * omap3xxx_prm_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.
+ */
+void omap3xxx_prm_iva_idle(void)
+{
+ /* ensure IVA2 clock is disabled */
+ omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+ /* if no clock activity, nothing else to do */
+ if (!(omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &
+ OMAP3430_CLKACTIVITY_IVA2_MASK))
+ return;
+
+ /* Reset IVA2 */
+ omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
+ OMAP3430_RST2_IVA2_MASK |
+ OMAP3430_RST3_IVA2_MASK,
+ OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
+
+ /* Enable IVA2 clock */
+ omap2_cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2_MASK,
+ OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+ /* Un-reset IVA2 */
+ omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
+
+ /* Disable IVA2 clock */
+ omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+ /* Reset IVA2 */
+ omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
+ OMAP3430_RST2_IVA2_MASK |
+ OMAP3430_RST3_IVA2_MASK,
+ OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
+}
+
+/**
+ * omap3xxx_prm_clear_global_cold_reset - checks the global cold reset status
+ * and clears it if asserted
+ *
+ * Checks if cold-reset has occurred and clears the status bit if yes. Returns
+ * 1 if cold-reset has occurred, 0 otherwise.
+ */
+int omap3xxx_prm_clear_global_cold_reset(void)
+{
+ if (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) &
+ OMAP3430_GLOBAL_COLD_RST_MASK) {
+ omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK,
+ OMAP3430_GR_MOD,
+ OMAP3_PRM_RSTST_OFFSET);
+ return 1;
+ }
+
+ return 0;
+}
+
+void omap3_prm_save_scratchpad_contents(u32 *ptr)
+{
+ *ptr++ = omap2_prm_read_mod_reg(OMAP3430_GR_MOD,
+ OMAP3_PRM_CLKSRC_CTRL_OFFSET);
+
+ *ptr++ = omap2_prm_read_mod_reg(OMAP3430_GR_MOD,
+ OMAP3_PRM_CLKSEL_OFFSET);
+}
+
/* Powerdomain low-level functions */
static int omap3_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
projects / karo-tx-linux.git / blobdiff