/** * omap_hsmmc_reset() - Full reset of each HS-MMC controller * * Ensure that each MMC controller is fully reset. Controllers * left in an unknown state (by bootloader) may prevent retention * or OFF-mode. This is especially important in cases where the * MMC driver is not enabled, _or_ built as a module. * * In order for reset to work, interface, functional and debounce * clocks must be enabled. The debounce clock comes from func_32k_clk * and is not under SW control, so we only enable i- and f-clocks. **/ static void __init omap_hsmmc_reset(void) { u32 i, nr_controllers; if (cpu_is_omap242x()) return; nr_controllers = cpu_is_omap44xx() ? OMAP44XX_NR_MMC : (cpu_is_omap34xx() ? OMAP34XX_NR_MMC : OMAP24XX_NR_MMC); for (i = 0; i < nr_controllers; i++) { u32 v, base = 0; struct clk *iclk, *fclk; struct device *dev = &dummy_pdev.dev; switch (i) { case 0: base = OMAP2_MMC1_BASE; break; case 1: base = OMAP2_MMC2_BASE; break; case 2: base = OMAP3_MMC3_BASE; break; case 3: if (!cpu_is_omap44xx()) return; base = OMAP4_MMC4_BASE; break; case 4: if (!cpu_is_omap44xx()) return; base = OMAP4_MMC5_BASE; break; } if (cpu_is_omap44xx()) base += OMAP4_MMC_REG_OFFSET; dummy_pdev.id = i; dev_set_name(&dummy_pdev.dev, "mmci-omap-hs.%d", i); iclk = clk_get(dev, "ick"); if (iclk && clk_enable(iclk)) iclk = NULL; fclk = clk_get(dev, "fck"); if (fclk && clk_enable(fclk)) fclk = NULL; if (!iclk || !fclk) { printk(KERN_WARNING "%s: Unable to enable clocks for MMC%d, " "cannot reset.\n", __func__, i); break; } omap_writel(MMCHS_SYSCONFIG_SWRESET, base + MMCHS_SYSCONFIG); v = omap_readl(base + MMCHS_SYSSTATUS); while (!(omap_readl(base + MMCHS_SYSSTATUS) & MMCHS_SYSSTATUS_RESETDONE)) cpu_relax(); if (fclk) { clk_disable(fclk); clk_put(fclk); } if (iclk) { clk_disable(iclk); clk_put(iclk); } } }
static int __init omap2_pm_init(void) { u32 l; if (!cpu_is_omap24xx()) return -ENODEV; printk(KERN_INFO "Power Management for OMAP2 initializing\n"); l = prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_REVISION_OFFSET); printk(KERN_INFO "PRCM revision %d.%d\n", (l >> 4) & 0x0f, l & 0x0f); /* Look up important powerdomains */ 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"); /* Look up important clockdomains */ mpu_clkdm = clkdm_lookup("mpu_clkdm"); if (!mpu_clkdm) pr_err("PM: mpu_clkdm not found\n"); wkup_clkdm = clkdm_lookup("wkup_clkdm"); if (!wkup_clkdm) pr_err("PM: wkup_clkdm not found\n"); dsp_clkdm = clkdm_lookup("dsp_clkdm"); if (!dsp_clkdm) pr_err("PM: dsp_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"); 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(); /* 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 * memory the MPU can see when it wakes up. */ if (cpu_is_omap24xx()) { 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; return 0; }
int __init omap2_clk_init(void) { struct prcm_config *prcm; struct clk **clkp; u32 clkrate; if (cpu_is_omap242x()) cpu_mask = RATE_IN_242X; else if (cpu_is_omap2430()) cpu_mask = RATE_IN_243X; clk_init(&omap2_clk_functions); omap2_osc_clk_recalc(&osc_ck, 0, CURRENT_RATE); omap2_sys_clk_recalc(&sys_ck, sys_ck.parent->rate, CURRENT_RATE); for (clkp = onchip_24xx_clks; clkp < onchip_24xx_clks + ARRAY_SIZE(onchip_24xx_clks); clkp++) { if ((*clkp)->flags & CLOCK_IN_OMAP242X && cpu_is_omap2420()) { clk_register(*clkp); continue; } if ((*clkp)->flags & CLOCK_IN_OMAP243X && cpu_is_omap2430()) { clk_register(*clkp); continue; } } /* Check the MPU rate set by bootloader */ clkrate = omap2xxx_clk_get_core_rate(&dpll_ck, dpll_ck.parent->rate); for (prcm = rate_table; prcm->mpu_speed; prcm++) { if (!(prcm->flags & cpu_mask)) continue; if (prcm->xtal_speed != sys_ck.rate) continue; if (prcm->dpll_speed <= clkrate) break; } curr_prcm_set = prcm; recalculate_root_clocks(); printk(KERN_INFO "Clocking rate (Crystal/DPLL/MPU): " "%ld.%01ld/%ld/%ld MHz\n", (sys_ck.rate / 1000000), (sys_ck.rate / 100000) % 10, (dpll_ck.rate / 1000000), (mpu_ck.rate / 1000000)) ; /* * Only enable those clocks we will need, let the drivers * enable other clocks as necessary */ clk_enable_init_clocks(); /* Avoid sleeping sleeping during omap2_clk_prepare_for_reboot() */ vclk = clk_get(NULL, "virt_prcm_set"); sclk = clk_get(NULL, "sys_ck"); return 0; }
void __init omap2_init_common_infrastructure(void) { u8 postsetup_state; if (cpu_is_omap242x()) { omap2xxx_powerdomains_init(); omap2_clockdomains_init(); omap2420_hwmod_init(); } else if (cpu_is_omap243x()) { omap2xxx_powerdomains_init(); omap2_clockdomains_init(); omap2430_hwmod_init(); } else if (cpu_is_omap34xx()) { omap3xxx_powerdomains_init(); omap2_clockdomains_init(); omap3xxx_hwmod_init(); } else if (cpu_is_omap44xx()) { omap44xx_powerdomains_init(); omap44xx_clockdomains_init(); omap44xx_hwmod_init(); } else { pr_err("Could not init hwmod data - unknown SoC\n"); } /* Set the default postsetup state for all hwmods */ #ifdef CONFIG_PM_RUNTIME postsetup_state = _HWMOD_STATE_IDLE; #else postsetup_state = _HWMOD_STATE_ENABLED; #endif omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state); /* * Set the default postsetup state for unusual modules (like * MPU WDT). * * The postsetup_state is not actually used until * omap_hwmod_late_init(), so boards that desire full watchdog * coverage of kernel initialization can reprogram the * postsetup_state between the calls to * omap2_init_common_infra() and omap2_init_common_devices(). * * XXX ideally we could detect whether the MPU WDT was currently * enabled here and make this conditional */ postsetup_state = _HWMOD_STATE_DISABLED; omap_hwmod_for_each_by_class("wd_timer", _set_hwmod_postsetup_state, &postsetup_state); omap_pm_if_early_init(); if (cpu_is_omap2420()) omap2420_clk_init(); else if (cpu_is_omap2430()) omap2430_clk_init(); else if (cpu_is_omap34xx()) omap3xxx_clk_init(); else if (cpu_is_omap44xx()) omap4xxx_clk_init(); else pr_err("Could not init clock framework - unknown SoC\n"); }
int __init omap2_pm_init(void) { u32 l; printk(KERN_INFO "Power Management for OMAP2 initializing\n"); l = omap2_prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_REVISION_OFFSET); printk(KERN_INFO "PRCM revision %d.%d\n", (l >> 4) & 0x0f, l & 0x0f); /* Look up important powerdomains */ 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"); /* Look up important clockdomains */ mpu_clkdm = clkdm_lookup("mpu_clkdm"); if (!mpu_clkdm) pr_err("PM: mpu_clkdm not found\n"); wkup_clkdm = clkdm_lookup("wkup_clkdm"); if (!wkup_clkdm) pr_err("PM: wkup_clkdm not found\n"); dsp_clkdm = clkdm_lookup("dsp_clkdm"); if (!dsp_clkdm) pr_err("PM: dsp_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"); 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(); /* * 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. */ 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); arm_pm_idle = omap2_pm_idle; return 0; }
int __init omap2_clk_init(void) { /* struct prcm_config *prcm; */ struct clk **clkp; /* u32 clkrate; */ u32 cpu_clkflg; /* REVISIT: Ultimately this will be used for multiboot */ #if 0 if (cpu_is_omap242x()) { cpu_mask = RATE_IN_242X; cpu_clkflg = CLOCK_IN_OMAP242X; clkp = onchip_24xx_clks; } else if (cpu_is_omap2430()) { cpu_mask = RATE_IN_243X; cpu_clkflg = CLOCK_IN_OMAP243X; clkp = onchip_24xx_clks; } #endif if (cpu_is_omap34xx()) { cpu_mask = RATE_IN_343X; cpu_clkflg = CLOCK_IN_OMAP343X; clkp = onchip_34xx_clks; /* * Update this if there are further clock changes between ES2 * and production parts */ if (is_sil_rev_equal_to(OMAP3430_REV_ES1_0)) { /* No 3430ES1-only rates exist, so no RATE_IN_3430ES1 */ cpu_clkflg |= CLOCK_IN_OMAP3430ES1; } else { cpu_mask |= RATE_IN_3430ES2; cpu_clkflg |= CLOCK_IN_OMAP3430ES2; } } clk_init(&omap2_clk_functions); for (clkp = onchip_34xx_clks; clkp < onchip_34xx_clks + ARRAY_SIZE(onchip_34xx_clks); clkp++) { if ((*clkp)->flags & cpu_clkflg) clk_register(*clkp); } /* REVISIT: Not yet ready for OMAP3 */ #if 0 /* Check the MPU rate set by bootloader */ clkrate = omap2_get_dpll_rate_24xx(&dpll_ck); for (prcm = rate_table; prcm->mpu_speed; prcm++) { if (!(prcm->flags & cpu_mask)) continue; if (prcm->xtal_speed != sys_ck.rate) continue; if (prcm->dpll_speed <= clkrate) break; } curr_prcm_set = prcm; #endif recalculate_root_clocks(); printk(KERN_INFO "Clocking rate (Crystal/DPLL/ARM core): " "%ld.%01ld/%ld/%ld MHz\n", (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10, (core_ck.rate / 1000000), (arm_fck.rate / 1000000)); /* * Only enable those clocks we will need, let the drivers * enable other clocks as necessary */ clk_enable_init_clocks(); /* Avoid sleeping during omap2_clk_prepare_for_reboot() */ /* REVISIT: not yet ready for 343x */ #if 0 vclk = clk_get(NULL, "virt_prcm_set"); sclk = clk_get(NULL, "sys_ck"); #endif return 0; }