/* * OMAP2/3 System Control Module register access * * Copyright (C) 2007, 2012 Texas Instruments, Inc. * Copyright (C) 2007 Nokia Corporation * * Written by Paul Walmsley * * 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. */ #undef DEBUG #include #include #include "soc.h" #include "iomap.h" #include "common.h" #include "cm-regbits-34xx.h" #include "prm-regbits-34xx.h" #include "prm3xxx.h" #include "cm3xxx.h" #include "sdrc.h" #include "pm.h" #include "control.h" /* Used by omap3_ctrl_save_padconf() */ #define START_PADCONF_SAVE 0x2 #define PADCONF_SAVE_DONE 0x1 static void __iomem *omap2_ctrl_base; static void __iomem *omap4_ctrl_pad_base; #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) struct omap3_scratchpad { u32 boot_config_ptr; u32 public_restore_ptr; u32 secure_ram_restore_ptr; u32 sdrc_module_semaphore; u32 prcm_block_offset; u32 sdrc_block_offset; }; struct omap3_scratchpad_prcm_block { u32 prm_clksrc_ctrl; u32 prm_clksel; u32 cm_contents[11]; u32 prcm_block_size; }; struct omap3_scratchpad_sdrc_block { u16 sysconfig; u16 cs_cfg; u16 sharing; u16 err_type; u32 dll_a_ctrl; u32 dll_b_ctrl; u32 power; u32 cs_0; u32 mcfg_0; u16 mr_0; u16 emr_1_0; u16 emr_2_0; u16 emr_3_0; u32 actim_ctrla_0; u32 actim_ctrlb_0; u32 rfr_ctrl_0; u32 cs_1; u32 mcfg_1; u16 mr_1; u16 emr_1_1; u16 emr_2_1; u16 emr_3_1; u32 actim_ctrla_1; u32 actim_ctrlb_1; u32 rfr_ctrl_1; u16 dcdl_1_ctrl; u16 dcdl_2_ctrl; u32 flags; u32 block_size; }; void *omap3_secure_ram_storage; /* * This is used to store ARM registers in SDRAM before attempting * an MPU OFF. The save and restore happens from the SRAM sleep code. * The address is stored in scratchpad, so that it can be used * during the restore path. */ u32 omap3_arm_context[128]; struct omap3_control_regs { u32 sysconfig; u32 devconf0; u32 mem_dftrw0; u32 mem_dftrw1; u32 msuspendmux_0; u32 msuspendmux_1; u32 msuspendmux_2; u32 msuspendmux_3; u32 msuspendmux_4; u32 msuspendmux_5; u32 sec_ctrl; u32 devconf1; u32 csirxfe; u32 iva2_bootaddr; u32 iva2_bootmod; u32 debobs_0; u32 debobs_1; u32 debobs_2; u32 debobs_3; u32 debobs_4; u32 debobs_5; u32 debobs_6; u32 debobs_7; u32 debobs_8; u32 prog_io0; u32 prog_io1; u32 dss_dpll_spreading; u32 core_dpll_spreading; u32 per_dpll_spreading; u32 usbhost_dpll_spreading; u32 pbias_lite; u32 temp_sensor; u32 sramldo4; u32 sramldo5; u32 csi; u32 padconf_sys_nirq; }; static struct omap3_control_regs control_context; #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */ #define OMAP_CTRL_REGADDR(reg) (omap2_ctrl_base + (reg)) #define OMAP4_CTRL_PAD_REGADDR(reg) (omap4_ctrl_pad_base + (reg)) void __init omap2_set_globals_control(void __iomem *ctrl, void __iomem *ctrl_pad) { omap2_ctrl_base = ctrl; omap4_ctrl_pad_base = ctrl_pad; } void __iomem *omap_ctrl_base_get(void) { return omap2_ctrl_base; } u8 omap_ctrl_readb(u16 offset) { return __raw_readb(OMAP_CTRL_REGADDR(offset)); } u16 omap_ctrl_readw(u16 offset) { return __raw_readw(OMAP_CTRL_REGADDR(offset)); } u32 omap_ctrl_readl(u16 offset) { return __raw_readl(OMAP_CTRL_REGADDR(offset)); } void omap_ctrl_writeb(u8 val, u16 offset) { __raw_writeb(val, OMAP_CTRL_REGADDR(offset)); } void omap_ctrl_writew(u16 val, u16 offset) { __raw_writew(val, OMAP_CTRL_REGADDR(offset)); } void omap_ctrl_writel(u32 val, u16 offset) { __raw_writel(val, OMAP_CTRL_REGADDR(offset)); } /* * On OMAP4 control pad are not addressable from control * core base. So the common omap_ctrl_read/write APIs breaks * Hence export separate APIs to manage the omap4 pad control * registers. This APIs will work only for OMAP4 */ u32 omap4_ctrl_pad_readl(u16 offset) { return __raw_readl(OMAP4_CTRL_PAD_REGADDR(offset)); } void omap4_ctrl_pad_writel(u32 val, u16 offset) { __raw_writel(val, OMAP4_CTRL_PAD_REGADDR(offset)); } #ifdef CONFIG_ARCH_OMAP3 /** * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot * @bootmode: 8-bit value to pass to some boot code * * Set the bootmode in the scratchpad RAM. This is used after the * system restarts. Not sure what actually uses this - it may be the * bootloader, rather than the boot ROM - contrary to the preserved * comment below. No return value. */ void omap3_ctrl_write_boot_mode(u8 bootmode) { u32 l; l = ('B' << 24) | ('M' << 16) | bootmode; /* * Reserve the first word in scratchpad for communicating * with the boot ROM. A pointer to a data structure * describing the boot process can be stored there, * cf. OMAP34xx TRM, Initialization / Software Booting * Configuration. * * XXX This should use some omap_ctrl_writel()-type function */ __raw_writel(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4)); } #endif /** * omap_ctrl_write_dsp_boot_addr - set boot address for a remote processor * @bootaddr: physical address of the boot loader * * Set boot address for the boot loader of a supported processor * when a power ON sequence occurs. */ void omap_ctrl_write_dsp_boot_addr(u32 bootaddr) { u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTADDR : cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTADDR : cpu_is_omap44xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR : soc_is_omap54xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR : 0; if (!offset) { pr_err("%s: unsupported omap type\n", __func__); return; } omap_ctrl_writel(bootaddr, offset); } /** * omap_ctrl_write_dsp_boot_mode - set boot mode for a remote processor * @bootmode: 8-bit value to pass to some boot code * * Sets boot mode for the boot loader of a supported processor * when a power ON sequence occurs. */ void omap_ctrl_write_dsp_boot_mode(u8 bootmode) { u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTMOD : cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTMOD : 0; if (!offset) { pr_err("%s: unsupported omap type\n", __func__); return; } omap_ctrl_writel(bootmode, offset); } #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) /* * Clears the scratchpad contents in case of cold boot- * called during bootup */ void omap3_clear_scratchpad_contents(void) { u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET; void __iomem *v_addr; u32 offset = 0; v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM); if (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) & OMAP3430_GLOBAL_COLD_RST_MASK) { for ( ; offset <= max_offset; offset += 0x4) __raw_writel(0x0, (v_addr + offset)); omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK, OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET); } } /* Populate the scratchpad structure with restore structure */ void omap3_save_scratchpad_contents(void) { void __iomem *scratchpad_address; u32 arm_context_addr; struct omap3_scratchpad scratchpad_contents; struct omap3_scratchpad_prcm_block prcm_block_contents; struct omap3_scratchpad_sdrc_block sdrc_block_contents; /* * Populate the Scratchpad contents * * The "get_*restore_pointer" functions are used to provide a * physical restore address where the ROM code jumps while waking * up from MPU OFF/OSWR state. * The restore pointer is stored into the scratchpad. */ scratchpad_contents.boot_config_ptr = 0x0; if (cpu_is_omap3630()) scratchpad_contents.public_restore_ptr = virt_to_phys(omap3_restore_3630); else if (omap_rev() != OMAP3430_REV_ES3_0 && omap_rev() != OMAP3430_REV_ES3_1 && omap_rev() != OMAP3430_REV_ES3_1_2) scratchpad_contents.public_restore_ptr = virt_to_phys(omap3_restore); else scratchpad_contents.public_restore_ptr = virt_to_phys(omap3_restore_es3); if (omap_type() == OMAP2_DEVICE_TYPE_GP) scratchpad_contents.secure_ram_restore_ptr = 0x0; else scratchpad_contents.secure_ram_restore_ptr = (u32) __pa(omap3_secure_ram_storage); scratchpad_contents.sdrc_module_semaphore = 0x0; scratchpad_contents.prcm_block_offset = 0x2C; scratchpad_contents.sdrc_block_offset = 0x64; /* Populate the PRCM block contents */ prcm_block_contents.prm_clksrc_ctrl = omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_CLKSRC_CTRL_OFFSET); prcm_block_contents.prm_clksel = omap2_prm_read_mod_reg(OMAP3430_CCR_MOD, OMAP3_PRM_CLKSEL_OFFSET); omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents); prcm_block_contents.prcm_block_size = 0x0; /* Populate the SDRC block contents */ sdrc_block_contents.sysconfig = (sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF); sdrc_block_contents.cs_cfg = (sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF); sdrc_block_contents.sharing = (sdrc_read_reg(SDRC_SHARING) & 0xFFFF); sdrc_block_contents.err_type = (sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF); sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL); sdrc_block_contents.dll_b_ctrl = 0x0; /* * Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should * be programed to issue automatic self refresh on timeout * of AUTO_CNT = 1 prior to any transition to OFF mode. */ if ((omap_type() != OMAP2_DEVICE_TYPE_GP) && (omap_rev() >= OMAP3430_REV_ES3_0)) sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) & ~(SDRC_POWER_AUTOCOUNT_MASK| SDRC_POWER_CLKCTRL_MASK)) | (1 << SDRC_POWER_AUTOCOUNT_SHIFT) | SDRC_SELF_REFRESH_ON_AUTOCOUNT; else sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER); sdrc_block_contents.cs_0 = 0x0; sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0); sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF); sdrc_block_contents.emr_1_0 = 0x0; sdrc_block_contents.emr_2_0 = 0x0; sdrc_block_contents.emr_3_0 = 0x0; sdrc_block_contents.actim_ctrla_0 = sdrc_read_reg(SDRC_ACTIM_CTRL_A_0); sdrc_block_contents.actim_ctrlb_0 = sdrc_read_reg(SDRC_ACTIM_CTRL_B_0); sdrc_block_contents.rfr_ctrl_0 = sdrc_read_reg(SDRC_RFR_CTRL_0); sdrc_block_contents.cs_1 = 0x0; sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1); sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF; sdrc_block_contents.emr_1_1 = 0x0; sdrc_block_contents.emr_2_1 = 0x0; sdrc_block_contents.emr_3_1 = 0x0; sdrc_block_contents.actim_ctrla_1 = sdrc_read_reg(SDRC_ACTIM_CTRL_A_1); sdrc_block_contents.actim_ctrlb_1 = sdrc_read_reg(SDRC_ACTIM_CTRL_B_1); sdrc_block_contents.rfr_ctrl_1 = sdrc_read_reg(SDRC_RFR_CTRL_1); sdrc_block_contents.dcdl_1_ctrl = 0x0; sdrc_block_contents.dcdl_2_ctrl = 0x0; sdrc_block_contents.flags = 0x0; sdrc_block_contents.block_size = 0x0; arm_context_addr = virt_to_phys(omap3_arm_context); /* Copy all the contents to the scratchpad location */ scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD); memcpy_toio(scratchpad_address, &scratchpad_contents, sizeof(scratchpad_contents)); /* Scratchpad contents being 32 bits, a divide by 4 done here */ memcpy_toio(scratchpad_address + scratchpad_contents.prcm_block_offset, &prcm_block_contents, sizeof(prcm_block_contents)); memcpy_toio(scratchpad_address + scratchpad_contents.sdrc_block_offset, &sdrc_block_contents, sizeof(sdrc_block_contents)); /* * Copies the address of the location in SDRAM where ARM * registers get saved during a MPU OFF transition. */ memcpy_toio(scratchpad_address + scratchpad_contents.sdrc_block_offset + sizeof(sdrc_block_contents), &arm_context_addr, 4); } void omap3_control_save_context(void) { control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG); control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); control_context.mem_dftrw0 = omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0); control_context.mem_dftrw1 = omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1); control_context.msuspendmux_0 = omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0); control_context.msuspendmux_1 = omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1); control_context.msuspendmux_2 = omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2); control_context.msuspendmux_3 = omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3); control_context.msuspendmux_4 = omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4); control_context.msuspendmux_5 = omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5); control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL); control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1); control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE); control_context.iva2_bootaddr = omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR); control_context.iva2_bootmod = omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD); control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0)); control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1)); control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2)); control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3)); control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4)); control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5)); control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6)); control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7)); control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8)); control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0); control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1); control_context.dss_dpll_spreading = omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING); control_context.core_dpll_spreading = omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING); control_context.per_dpll_spreading = omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING); control_context.usbhost_dpll_spreading = omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING); control_context.pbias_lite = omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE); control_context.temp_sensor = omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR); control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4); control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5); control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI); control_context.padconf_sys_nirq = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ); return; } void omap3_control_restore_context(void) { omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG); omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0); omap_ctrl_writel(control_context.mem_dftrw0, OMAP343X_CONTROL_MEM_DFTRW0); omap_ctrl_writel(control_context.mem_dftrw1, OMAP343X_CONTROL_MEM_DFTRW1); omap_ctrl_writel(control_context.msuspendmux_0, OMAP2_CONTROL_MSUSPENDMUX_0); omap_ctrl_writel(control_context.msuspendmux_1, OMAP2_CONTROL_MSUSPENDMUX_1); omap_ctrl_writel(control_context.msuspendmux_2, OMAP2_CONTROL_MSUSPENDMUX_2); omap_ctrl_writel(control_context.msuspendmux_3, OMAP2_CONTROL_MSUSPENDMUX_3); omap_ctrl_writel(control_context.msuspendmux_4, OMAP2_CONTROL_MSUSPENDMUX_4); omap_ctrl_writel(control_context.msuspendmux_5, OMAP2_CONTROL_MSUSPENDMUX_5); omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL); omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1); omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE); omap_ctrl_writel(control_context.iva2_bootaddr, OMAP343X_CONTROL_IVA2_BOOTADDR); omap_ctrl_writel(control_context.iva2_bootmod, OMAP343X_CONTROL_IVA2_BOOTMOD); omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0)); omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1)); omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2)); omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3)); omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4)); omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5)); omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6)); omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7)); omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8)); omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0); omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1); omap_ctrl_writel(control_context.dss_dpll_spreading, OMAP343X_CONTROL_DSS_DPLL_SPREADING); omap_ctrl_writel(control_context.core_dpll_spreading, OMAP343X_CONTROL_CORE_DPLL_SPREADING); omap_ctrl_writel(control_context.per_dpll_spreading, OMAP343X_CONTROL_PER_DPLL_SPREADING); omap_ctrl_writel(control_context.usbhost_dpll_spreading, OMAP343X_CONTROL_USBHOST_DPLL_SPREADING); omap_ctrl_writel(control_context.pbias_lite, OMAP343X_CONTROL_PBIAS_LITE); omap_ctrl_writel(control_context.temp_sensor, OMAP343X_CONTROL_TEMP_SENSOR); omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4); omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5); omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI); omap_ctrl_writel(control_context.padconf_sys_nirq, OMAP343X_CONTROL_PADCONF_SYSNIRQ); return; } void omap3630_ctrl_disable_rta(void) { if (!cpu_is_omap3630()) return; omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL); } /** * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM * * Tell the SCM to start saving the padconf registers, then wait for * the process to complete. Returns 0 unconditionally, although it * should also eventually be able to return -ETIMEDOUT, if the save * does not complete. * * XXX This function is missing a timeout. What should it be? */ int omap3_ctrl_save_padconf(void) { u32 cpo; /* Save the padconf registers */ cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF); cpo |= START_PADCONF_SAVE; omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF); /* wait for the save to complete */ while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS) & PADCONF_SAVE_DONE)) udelay(1); return 0; } /** * omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle * * Sets the bootmode for IVA2 to idle. This is needed by the PM code to * force disable IVA2 so that it does not prevent any low-power states. */ void omap3_ctrl_set_iva_bootmode_idle(void) { omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE, OMAP343X_CONTROL_IVA2_BOOTMOD); } #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */