diff options
Diffstat (limited to 'kernel/arch/arm/mach-omap2/control.c')
| -rw-r--r-- | kernel/arch/arm/mach-omap2/control.c | 748 |
1 files changed, 748 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap2/control.c b/kernel/arch/arm/mach-omap2/control.c new file mode 100644 index 000000000..af95a624f --- /dev/null +++ b/kernel/arch/arm/mach-omap2/control.c @@ -0,0 +1,748 @@ +/* + * 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 <linux/kernel.h> +#include <linux/io.h> +#include <linux/of_address.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> + +#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" +#include "clock.h" + +/* Used by omap3_ctrl_save_padconf() */ +#define START_PADCONF_SAVE 0x2 +#define PADCONF_SAVE_DONE 0x1 + +static void __iomem *omap2_ctrl_base; +static s16 omap2_ctrl_offset; +static struct regmap *omap2_ctrl_syscon; + +#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_contents[2]; + 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 */ + +void __init omap2_set_globals_control(void __iomem *ctrl) +{ + omap2_ctrl_base = ctrl; +} + +u8 omap_ctrl_readb(u16 offset) +{ + u32 val; + u8 byte_offset = offset & 0x3; + + val = omap_ctrl_readl(offset); + + return (val >> (byte_offset * 8)) & 0xff; +} + +u16 omap_ctrl_readw(u16 offset) +{ + u32 val; + u16 byte_offset = offset & 0x2; + + val = omap_ctrl_readl(offset); + + return (val >> (byte_offset * 8)) & 0xffff; +} + +u32 omap_ctrl_readl(u16 offset) +{ + u32 val; + + offset &= 0xfffc; + if (!omap2_ctrl_syscon) + val = readl_relaxed(omap2_ctrl_base + offset); + else + regmap_read(omap2_ctrl_syscon, omap2_ctrl_offset + offset, + &val); + + return val; +} + +void omap_ctrl_writeb(u8 val, u16 offset) +{ + u32 tmp; + u8 byte_offset = offset & 0x3; + + tmp = omap_ctrl_readl(offset); + + tmp &= 0xffffffff ^ (0xff << (byte_offset * 8)); + tmp |= val << (byte_offset * 8); + + omap_ctrl_writel(tmp, offset); +} + +void omap_ctrl_writew(u16 val, u16 offset) +{ + u32 tmp; + u8 byte_offset = offset & 0x2; + + tmp = omap_ctrl_readl(offset); + + tmp &= 0xffffffff ^ (0xffff << (byte_offset * 8)); + tmp |= val << (byte_offset * 8); + + omap_ctrl_writel(tmp, offset); +} + +void omap_ctrl_writel(u32 val, u16 offset) +{ + offset &= 0xfffc; + if (!omap2_ctrl_syscon) + writel_relaxed(val, omap2_ctrl_base + offset); + else + regmap_write(omap2_ctrl_syscon, omap2_ctrl_offset + offset, + val); +} + +#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 + */ + writel_relaxed(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 (omap3xxx_prm_clear_global_cold_reset()) { + for ( ; offset <= max_offset; offset += 0x4) + writel_relaxed(0x0, (v_addr + 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 */ + omap3_prm_save_scratchpad_contents(prcm_block_contents.prm_contents); + 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); +} + +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); +} + +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. + */ +static void __init omap3_ctrl_set_iva_bootmode_idle(void) +{ + omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE, + OMAP343X_CONTROL_IVA2_BOOTMOD); +} + +/** + * omap3_ctrl_setup_d2d_padconf - setup stacked modem pads for idle + * + * Sets up the pads controlling the stacked modem in such way that the + * device can enter idle. + */ +static void __init omap3_ctrl_setup_d2d_padconf(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); +} + +/** + * omap3_ctrl_init - does static initializations for control module + * + * Initializes system control module. This sets up the sysconfig autoidle, + * and sets up modem and iva2 so that they can be idled properly. + */ +void __init omap3_ctrl_init(void) +{ + omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG); + + omap3_ctrl_set_iva_bootmode_idle(); + + omap3_ctrl_setup_d2d_padconf(); +} +#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */ + +struct control_init_data { + int index; + s16 offset; +}; + +static struct control_init_data ctrl_data = { + .index = TI_CLKM_CTRL, +}; + +static const struct control_init_data omap2_ctrl_data = { + .index = TI_CLKM_CTRL, + .offset = -OMAP2_CONTROL_GENERAL, +}; + +static const struct of_device_id omap_scrm_dt_match_table[] = { + { .compatible = "ti,am3-scm", .data = &ctrl_data }, + { .compatible = "ti,am4-scm", .data = &ctrl_data }, + { .compatible = "ti,omap2-scm", .data = &omap2_ctrl_data }, + { .compatible = "ti,omap3-scm", .data = &omap2_ctrl_data }, + { .compatible = "ti,dm816-scrm", .data = &ctrl_data }, + { .compatible = "ti,omap4-scm-core", .data = &ctrl_data }, + { .compatible = "ti,omap5-scm-core", .data = &ctrl_data }, + { .compatible = "ti,dra7-scm-core", .data = &ctrl_data }, + { } +}; + +/** + * omap2_control_base_init - initialize iomappings for the control driver + * + * Detects and initializes the iomappings for the control driver, based + * on the DT data. Returns 0 in success, negative error value + * otherwise. + */ +int __init omap2_control_base_init(void) +{ + struct device_node *np; + const struct of_device_id *match; + struct control_init_data *data; + + for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) { + data = (struct control_init_data *)match->data; + + omap2_ctrl_base = of_iomap(np, 0); + if (!omap2_ctrl_base) + return -ENOMEM; + + omap2_ctrl_offset = data->offset; + } + + return 0; +} + +/** + * omap_control_init - low level init for the control driver + * + * Initializes the low level clock infrastructure for control driver. + * Returns 0 in success, negative error value in failure. + */ +int __init omap_control_init(void) +{ + struct device_node *np, *scm_conf; + const struct of_device_id *match; + const struct omap_prcm_init_data *data; + int ret; + struct regmap *syscon; + + for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) { + data = match->data; + + /* + * Check if we have scm_conf node, if yes, use this to + * access clock registers. + */ + scm_conf = of_get_child_by_name(np, "scm_conf"); + + if (scm_conf) { + syscon = syscon_node_to_regmap(scm_conf); + + if (IS_ERR(syscon)) + return PTR_ERR(syscon); + + omap2_ctrl_syscon = syscon; + + if (of_get_child_by_name(scm_conf, "clocks")) { + ret = omap2_clk_provider_init(scm_conf, + data->index, + syscon, NULL); + if (ret) + return ret; + } + + iounmap(omap2_ctrl_base); + omap2_ctrl_base = NULL; + } else { + /* No scm_conf found, direct access */ + ret = omap2_clk_provider_init(np, data->index, NULL, + omap2_ctrl_base); + if (ret) + return ret; + } + } + + return 0; +} + +/** + * omap3_control_legacy_iomap_init - legacy iomap init for clock providers + * + * Legacy iomap init for clock provider. Needed only by legacy boot mode, + * where the base addresses are not parsed from DT, but still required + * by the clock driver to be setup properly. + */ +void __init omap3_control_legacy_iomap_init(void) +{ + omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap2_ctrl_base); +} |