| /* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/io.h> |
| #include <linux/platform_device.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/of_irq.h> |
| #include <mach/msm_iomap.h> |
| #include <mach/socinfo.h> |
| #include <asm/mach-types.h> |
| #include <asm/sizes.h> |
| #include "scm-boot.h" |
| #include "idle.h" |
| #include "pm-boot.h" |
| |
| static uint32_t *msm_pm_reset_vector; |
| static uint32_t saved_vector[2]; |
| static void (*msm_pm_boot_before_pc)(unsigned int cpu, unsigned long entry); |
| static void (*msm_pm_boot_after_pc)(unsigned int cpu); |
| |
| |
| static int msm_pm_get_boot_config_mode(struct device_node *dev, |
| const char *key, uint32_t *boot_config_mode) |
| { |
| struct pm_lookup_table { |
| uint32_t boot_config_mode; |
| const char *boot_config_name; |
| }; |
| const char *boot_config_str; |
| struct pm_lookup_table boot_config_lookup[] = { |
| {MSM_PM_BOOT_CONFIG_TZ, "tz"}, |
| {MSM_PM_BOOT_CONFIG_RESET_VECTOR_PHYS, "reset_vector_phys"}, |
| {MSM_PM_BOOT_CONFIG_RESET_VECTOR_VIRT, "reset_vector_virt"}, |
| {MSM_PM_BOOT_CONFIG_REMAP_BOOT_ADDR, "remap_boot_addr"} |
| }; |
| int ret; |
| int i; |
| |
| ret = of_property_read_string(dev, key, &boot_config_str); |
| if (!ret) { |
| ret = -EINVAL; |
| for (i = 0; i < ARRAY_SIZE(boot_config_lookup); i++) { |
| if (!strncmp(boot_config_str, |
| boot_config_lookup[i].boot_config_name, |
| strlen(boot_config_lookup[i].boot_config_name)) |
| ) { |
| *boot_config_mode = |
| boot_config_lookup[i].boot_config_mode; |
| ret = 0; |
| break; |
| } |
| } |
| } |
| return ret; |
| } |
| |
| static void msm_pm_write_boot_vector(unsigned int cpu, unsigned long address) |
| { |
| msm_pm_boot_vector[cpu] = address; |
| clean_caches((unsigned long)&msm_pm_boot_vector[cpu], |
| sizeof(msm_pm_boot_vector[cpu]), |
| virt_to_phys(&msm_pm_boot_vector[cpu])); |
| } |
| |
| #ifdef CONFIG_MSM_SCM |
| static int __devinit msm_pm_tz_boot_init(void) |
| { |
| unsigned int flag = 0; |
| if (num_possible_cpus() == 1) |
| flag = SCM_FLAG_WARMBOOT_CPU0; |
| else if (num_possible_cpus() == 2) |
| flag = SCM_FLAG_WARMBOOT_CPU0 | SCM_FLAG_WARMBOOT_CPU1; |
| else if (num_possible_cpus() == 4) |
| flag = SCM_FLAG_WARMBOOT_CPU0 | SCM_FLAG_WARMBOOT_CPU1 | |
| SCM_FLAG_WARMBOOT_CPU2 | SCM_FLAG_WARMBOOT_CPU3; |
| else |
| __WARN(); |
| |
| return scm_set_boot_addr(virt_to_phys(msm_pm_boot_entry), flag); |
| } |
| |
| static void msm_pm_config_tz_before_pc(unsigned int cpu, |
| unsigned long entry) |
| { |
| msm_pm_write_boot_vector(cpu, entry); |
| } |
| #else |
| static int __init msm_pm_tz_boot_init(void) |
| { |
| return 0; |
| }; |
| |
| static inline void msm_pm_config_tz_before_pc(unsigned int cpu, |
| unsigned long entry) {} |
| #endif |
| |
| static int __devinit msm_pm_boot_reset_vector_init(uint32_t *reset_vector) |
| { |
| if (!reset_vector) |
| return -ENODEV; |
| msm_pm_reset_vector = reset_vector; |
| mb(); |
| |
| return 0; |
| } |
| |
| static void msm_pm_config_rst_vector_before_pc(unsigned int cpu, |
| unsigned long entry) |
| { |
| saved_vector[0] = msm_pm_reset_vector[0]; |
| saved_vector[1] = msm_pm_reset_vector[1]; |
| msm_pm_reset_vector[0] = 0xE51FF004; /* ldr pc, 4 */ |
| msm_pm_reset_vector[1] = entry; |
| } |
| |
| static void msm_pm_config_rst_vector_after_pc(unsigned int cpu) |
| { |
| msm_pm_reset_vector[0] = saved_vector[0]; |
| msm_pm_reset_vector[1] = saved_vector[1]; |
| } |
| |
| void msm_pm_boot_config_before_pc(unsigned int cpu, unsigned long entry) |
| { |
| if (msm_pm_boot_before_pc) |
| msm_pm_boot_before_pc(cpu, entry); |
| } |
| |
| void msm_pm_boot_config_after_pc(unsigned int cpu) |
| { |
| if (msm_pm_boot_after_pc) |
| msm_pm_boot_after_pc(cpu); |
| } |
| #define BOOT_REMAP_ENABLE BIT(0) |
| |
| int __devinit msm_pm_boot_init(struct msm_pm_boot_platform_data *pdata) |
| { |
| int ret = 0; |
| unsigned long entry; |
| void __iomem *warm_boot_ptr; |
| |
| switch (pdata->mode) { |
| case MSM_PM_BOOT_CONFIG_TZ: |
| ret = msm_pm_tz_boot_init(); |
| msm_pm_boot_before_pc = msm_pm_config_tz_before_pc; |
| msm_pm_boot_after_pc = NULL; |
| break; |
| case MSM_PM_BOOT_CONFIG_RESET_VECTOR_PHYS: |
| pdata->v_addr = ioremap(pdata->p_addr, PAGE_SIZE); |
| /* Fall through */ |
| case MSM_PM_BOOT_CONFIG_RESET_VECTOR_VIRT: |
| |
| if (!pdata->v_addr) |
| return -ENODEV; |
| |
| ret = msm_pm_boot_reset_vector_init(pdata->v_addr); |
| msm_pm_boot_before_pc |
| = msm_pm_config_rst_vector_before_pc; |
| msm_pm_boot_after_pc |
| = msm_pm_config_rst_vector_after_pc; |
| break; |
| case MSM_PM_BOOT_CONFIG_REMAP_BOOT_ADDR: |
| if (!cpu_is_msm8625() && !cpu_is_msm8625q()) { |
| void *remapped; |
| |
| /* |
| * Set the boot remap address and enable remapping of |
| * reset vector |
| */ |
| if (!pdata->p_addr || !pdata->v_addr) |
| return -ENODEV; |
| |
| remapped = ioremap_nocache(pdata->p_addr, SZ_8); |
| ret = msm_pm_boot_reset_vector_init(remapped); |
| |
| __raw_writel((pdata->p_addr | BOOT_REMAP_ENABLE), |
| pdata->v_addr); |
| |
| msm_pm_boot_before_pc |
| = msm_pm_config_rst_vector_before_pc; |
| msm_pm_boot_after_pc |
| = msm_pm_config_rst_vector_after_pc; |
| } else { |
| uint32_t mpa5_boot_remap_addr[2] = {0x34, 0x4C}; |
| uint32_t mpa5_cfg_ctl[2] = {0x30, 0x48}; |
| |
| warm_boot_ptr = ioremap_nocache( |
| MSM8625_WARM_BOOT_PHYS, SZ_64); |
| ret = msm_pm_boot_reset_vector_init(warm_boot_ptr); |
| |
| entry = virt_to_phys(msm_pm_boot_entry); |
| |
| /* |
| * Below sequence is a work around for cores |
| * to come out of GDFS properly on 8625 target. |
| * On 8625 while cores coming out of GDFS observed |
| * the memory corruption at very first memory read. |
| */ |
| msm_pm_reset_vector[0] = 0xE59F000C; /* ldr r0, 0x14 */ |
| msm_pm_reset_vector[1] = 0xE59F1008; /* ldr r1, 0x14 */ |
| msm_pm_reset_vector[2] = 0xE1500001; /* cmp r0, r1 */ |
| msm_pm_reset_vector[3] = 0x1AFFFFFB; /* bne 0x0 */ |
| msm_pm_reset_vector[4] = 0xE12FFF10; /* bx r0 */ |
| msm_pm_reset_vector[5] = entry; /* 0x14 */ |
| |
| /* |
| * Here upper 16bits[16:31] used by CORE1 |
| * lower 16bits[0:15] used by CORE0 |
| */ |
| entry = (MSM8625_WARM_BOOT_PHYS | |
| ((MSM8625_WARM_BOOT_PHYS & 0xFFFF0000) >> 16)); |
| |
| /* write 'entry' to boot remapper register */ |
| __raw_writel(entry, (pdata->v_addr + |
| mpa5_boot_remap_addr[0])); |
| |
| /* |
| * Enable boot remapper for C0 [bit:25th] |
| * Enable boot remapper for C1 [bit:26th] |
| */ |
| __raw_writel(readl_relaxed(pdata->v_addr + |
| mpa5_cfg_ctl[0]) | (0x3 << 25), |
| pdata->v_addr + mpa5_cfg_ctl[0]); |
| |
| /* 8x25Q changes */ |
| if (cpu_is_msm8625q()) { |
| /* write 'entry' to boot remapper register */ |
| __raw_writel(entry, (pdata->v_addr + |
| mpa5_boot_remap_addr[1])); |
| |
| /* |
| * Enable boot remapper for C2 [bit:25th] |
| * Enable boot remapper for C3 [bit:26th] |
| */ |
| __raw_writel(readl_relaxed(pdata->v_addr + |
| mpa5_cfg_ctl[1]) | (0x3 << 25), |
| pdata->v_addr + mpa5_cfg_ctl[1]); |
| } |
| msm_pm_boot_before_pc = msm_pm_write_boot_vector; |
| } |
| break; |
| default: |
| __WARN(); |
| } |
| |
| return ret; |
| } |
| |
| static int __devinit msm_pm_boot_probe(struct platform_device *pdev) |
| { |
| struct msm_pm_boot_platform_data pdata; |
| char *key = NULL; |
| uint32_t val = 0; |
| int ret = 0; |
| uint32_t vaddr_val; |
| |
| pdata.p_addr = 0; |
| vaddr_val = 0; |
| |
| key = "qcom,mode"; |
| ret = msm_pm_get_boot_config_mode(pdev->dev.of_node, key, &val); |
| if (ret) |
| goto fail; |
| pdata.mode = val; |
| |
| key = "qcom,phy-addr"; |
| ret = of_property_read_u32(pdev->dev.of_node, key, &val); |
| if (!ret) |
| pdata.p_addr = val; |
| |
| |
| key = "qcom,virt-addr"; |
| ret = of_property_read_u32(pdev->dev.of_node, key, &vaddr_val); |
| |
| switch (pdata.mode) { |
| case MSM_PM_BOOT_CONFIG_RESET_VECTOR_PHYS: |
| if (!pdata.p_addr) { |
| key = "qcom,phy-addr"; |
| goto fail; |
| } |
| break; |
| case MSM_PM_BOOT_CONFIG_RESET_VECTOR_VIRT: |
| if (!vaddr_val) |
| goto fail; |
| |
| pdata.v_addr = (void *)vaddr_val; |
| break; |
| case MSM_PM_BOOT_CONFIG_REMAP_BOOT_ADDR: |
| if (!vaddr_val) |
| goto fail; |
| |
| pdata.v_addr = ioremap_nocache(vaddr_val, SZ_8); |
| |
| pdata.p_addr = allocate_contiguous_ebi_nomap(SZ_8, SZ_64K); |
| if (!pdata.p_addr) { |
| key = "qcom,phy-addr"; |
| goto fail; |
| } |
| break; |
| case MSM_PM_BOOT_CONFIG_TZ: |
| break; |
| default: |
| pr_err("%s: Unsupported boot mode %d", |
| __func__, pdata.mode); |
| goto fail; |
| } |
| |
| return msm_pm_boot_init(&pdata); |
| |
| fail: |
| pr_err("Error reading %s\n", key); |
| return -EFAULT; |
| } |
| |
| static struct of_device_id msm_pm_match_table[] = { |
| {.compatible = "qcom,pm-boot"}, |
| {}, |
| }; |
| |
| static struct platform_driver msm_pm_boot_driver = { |
| .probe = msm_pm_boot_probe, |
| .driver = { |
| .name = "pm-boot", |
| .owner = THIS_MODULE, |
| .of_match_table = msm_pm_match_table, |
| }, |
| }; |
| |
| static int __init msm_pm_boot_module_init(void) |
| { |
| return platform_driver_register(&msm_pm_boot_driver); |
| } |
| postcore_initcall(msm_pm_boot_module_init); |