diff options
Diffstat (limited to 'arch/arm/plat-samsung')
-rw-r--r-- | arch/arm/plat-samsung/Kconfig | 49 | ||||
-rw-r--r-- | arch/arm/plat-samsung/Makefile | 2 | ||||
-rw-r--r-- | arch/arm/plat-samsung/include/plat/pm-common.h | 70 | ||||
-rw-r--r-- | arch/arm/plat-samsung/pm-check.c | 233 | ||||
-rw-r--r-- | arch/arm/plat-samsung/pm-debug.c | 80 |
5 files changed, 2 insertions, 432 deletions
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig index 920931c3fefd..a7cb0db1d5cc 100644 --- a/arch/arm/plat-samsung/Kconfig +++ b/arch/arm/plat-samsung/Kconfig @@ -8,6 +8,7 @@ config PLAT_SAMSUNG default y select GENERIC_IRQ_CHIP select NO_IOPORT_MAP + select SOC_SAMSUNG help Base platform code for all Samsung SoC based systems @@ -234,54 +235,6 @@ config SAMSUNG_PM_GPIO pinctrl-samsung driver. endif -comment "Power management" - -config SAMSUNG_PM_DEBUG - bool "Samsung PM Suspend debug" - depends on PM && DEBUG_KERNEL - depends on PLAT_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210 - depends on DEBUG_S3C24XX_UART || DEBUG_S3C2410_UART - help - Say Y here if you want verbose debugging from the PM Suspend and - Resume code. See <file:Documentation/arm/samsung-s3c24xx/suspend.rst> - for more information. - -config S3C_PM_DEBUG_LED_SMDK - bool "SMDK LED suspend/resume debugging" - depends on PM && (MACH_SMDK6410) - help - Say Y here to enable the use of the SMDK LEDs on the baseboard - for debugging of the state of the suspend and resume process. - - Note, this currently only works for S3C64XX based SMDK boards. - -config SAMSUNG_PM_CHECK - bool "S3C2410 PM Suspend Memory CRC" - depends on PM && (PLAT_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210) - select CRC32 - help - Enable the PM code's memory area checksum over sleep. This option - will generate CRCs of all blocks of memory, and store them before - going to sleep. The blocks are then checked on resume for any - errors. - - Note, this can take several seconds depending on memory size - and CPU speed. - - See <file:Documentation/arm/samsung-s3c24xx/suspend.rst> - -config SAMSUNG_PM_CHECK_CHUNKSIZE - int "S3C2410 PM Suspend CRC Chunksize (KiB)" - depends on PM && SAMSUNG_PM_CHECK - default 64 - help - Set the chunksize in Kilobytes of the CRC for checking memory - corruption over suspend and resume. A smaller value will mean that - the CRC data block will take more memory, but will identify any - faults with better precision. - - See <file:Documentation/arm/samsung-s3c24xx/suspend.rst> - config SAMSUNG_WAKEMASK bool depends on PM diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile index d8a80fbcebb3..c47f58ed83e2 100644 --- a/arch/arm/plat-samsung/Makefile +++ b/arch/arm/plat-samsung/Makefile @@ -27,7 +27,5 @@ obj-$(CONFIG_GPIO_SAMSUNG) += gpio-samsung.o obj-$(CONFIG_PM_SLEEP) += pm-common.o obj-$(CONFIG_SAMSUNG_PM) += pm.o obj-$(CONFIG_SAMSUNG_PM_GPIO) += pm-gpio.o -obj-$(CONFIG_SAMSUNG_PM_CHECK) += pm-check.o -obj-$(CONFIG_SAMSUNG_PM_DEBUG) += pm-debug.o obj-$(CONFIG_SAMSUNG_WAKEMASK) += wakeup-mask.o diff --git a/arch/arm/plat-samsung/include/plat/pm-common.h b/arch/arm/plat-samsung/include/plat/pm-common.h index 87fa97fd6e8b..18b9607e1e39 100644 --- a/arch/arm/plat-samsung/include/plat/pm-common.h +++ b/arch/arm/plat-samsung/include/plat/pm-common.h @@ -11,6 +11,7 @@ #define __PLAT_SAMSUNG_PM_COMMON_H __FILE__ #include <linux/irq.h> +#include <linux/soc/samsung/s3c-pm.h> /* sleep save info */ @@ -36,73 +37,4 @@ extern void s3c_pm_do_save(struct sleep_save *ptr, int count); extern void s3c_pm_do_restore(const struct sleep_save *ptr, int count); extern void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count); -/* PM debug functions */ - -/** - * struct pm_uart_save - save block for core UART - * @ulcon: Save value for S3C2410_ULCON - * @ucon: Save value for S3C2410_UCON - * @ufcon: Save value for S3C2410_UFCON - * @umcon: Save value for S3C2410_UMCON - * @ubrdiv: Save value for S3C2410_UBRDIV - * - * Save block for UART registers to be held over sleep and restored if they - * are needed (say by debug). -*/ -struct pm_uart_save { - u32 ulcon; - u32 ucon; - u32 ufcon; - u32 umcon; - u32 ubrdiv; - u32 udivslot; -}; - -#ifdef CONFIG_SAMSUNG_PM_DEBUG -/** - * s3c_pm_dbg() - low level debug function for use in suspend/resume. - * @msg: The message to print. - * - * This function is used mainly to debug the resume process before the system - * can rely on printk/console output. It uses the low-level debugging output - * routine printascii() to do its work. - */ -extern void s3c_pm_dbg(const char *msg, ...); - -#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt) - -extern void s3c_pm_save_uarts(bool is_s3c24xx); -extern void s3c_pm_restore_uarts(bool is_s3c24xx); - -#ifdef CONFIG_ARCH_S3C64XX -extern void s3c_pm_arch_update_uart(void __iomem *regs, - struct pm_uart_save *save); -#else -static inline void -s3c_pm_arch_update_uart(void __iomem *regs, struct pm_uart_save *save) -{ -} -#endif - -#else -#define S3C_PMDBG(fmt...) pr_debug(fmt) - -static inline void s3c_pm_save_uarts(bool is_s3c24xx) { } -static inline void s3c_pm_restore_uarts(bool is_s3c24xx) { } -#endif - -/* suspend memory checking */ - -#ifdef CONFIG_SAMSUNG_PM_CHECK -extern void s3c_pm_check_prepare(void); -extern void s3c_pm_check_restore(void); -extern void s3c_pm_check_cleanup(void); -extern void s3c_pm_check_store(void); -#else -#define s3c_pm_check_prepare() do { } while (0) -#define s3c_pm_check_restore() do { } while (0) -#define s3c_pm_check_cleanup() do { } while (0) -#define s3c_pm_check_store() do { } while (0) -#endif - #endif diff --git a/arch/arm/plat-samsung/pm-check.c b/arch/arm/plat-samsung/pm-check.c deleted file mode 100644 index cd2c02c68bc3..000000000000 --- a/arch/arm/plat-samsung/pm-check.c +++ /dev/null @@ -1,233 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// -// originally in linux/arch/arm/plat-s3c24xx/pm.c -// -// Copyright (c) 2004-2008 Simtec Electronics -// http://armlinux.simtec.co.uk -// Ben Dooks <ben@simtec.co.uk> -// -// S3C Power Mangament - suspend/resume memory corruption check. - -#include <linux/kernel.h> -#include <linux/suspend.h> -#include <linux/init.h> -#include <linux/crc32.h> -#include <linux/ioport.h> -#include <linux/slab.h> - -#include <plat/pm-common.h> - -#if CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE < 1 -#error CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE must be a positive non-zero value -#endif - -/* suspend checking code... - * - * this next area does a set of crc checks over all the installed - * memory, so the system can verify if the resume was ok. - * - * CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE defines the block-size for the CRC, - * increasing it will mean that the area corrupted will be less easy to spot, - * and reducing the size will cause the CRC save area to grow -*/ - -#define CHECK_CHUNKSIZE (CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE * 1024) - -static u32 crc_size; /* size needed for the crc block */ -static u32 *crcs; /* allocated over suspend/resume */ - -typedef u32 *(run_fn_t)(struct resource *ptr, u32 *arg); - -/* s3c_pm_run_res - * - * go through the given resource list, and look for system ram -*/ - -static void s3c_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg) -{ - while (ptr != NULL) { - if (ptr->child != NULL) - s3c_pm_run_res(ptr->child, fn, arg); - - if ((ptr->flags & IORESOURCE_SYSTEM_RAM) - == IORESOURCE_SYSTEM_RAM) { - S3C_PMDBG("Found system RAM at %08lx..%08lx\n", - (unsigned long)ptr->start, - (unsigned long)ptr->end); - arg = (fn)(ptr, arg); - } - - ptr = ptr->sibling; - } -} - -static void s3c_pm_run_sysram(run_fn_t fn, u32 *arg) -{ - s3c_pm_run_res(&iomem_resource, fn, arg); -} - -static u32 *s3c_pm_countram(struct resource *res, u32 *val) -{ - u32 size = (u32)resource_size(res); - - size += CHECK_CHUNKSIZE-1; - size /= CHECK_CHUNKSIZE; - - S3C_PMDBG("Area %08lx..%08lx, %d blocks\n", - (unsigned long)res->start, (unsigned long)res->end, size); - - *val += size * sizeof(u32); - return val; -} - -/* s3c_pm_prepare_check - * - * prepare the necessary information for creating the CRCs. This - * must be done before the final save, as it will require memory - * allocating, and thus touching bits of the kernel we do not - * know about. -*/ - -void s3c_pm_check_prepare(void) -{ - crc_size = 0; - - s3c_pm_run_sysram(s3c_pm_countram, &crc_size); - - S3C_PMDBG("s3c_pm_prepare_check: %u checks needed\n", crc_size); - - crcs = kmalloc(crc_size+4, GFP_KERNEL); - if (crcs == NULL) - printk(KERN_ERR "Cannot allocated CRC save area\n"); -} - -static u32 *s3c_pm_makecheck(struct resource *res, u32 *val) -{ - unsigned long addr, left; - - for (addr = res->start; addr < res->end; - addr += CHECK_CHUNKSIZE) { - left = res->end - addr; - - if (left > CHECK_CHUNKSIZE) - left = CHECK_CHUNKSIZE; - - *val = crc32_le(~0, phys_to_virt(addr), left); - val++; - } - - return val; -} - -/* s3c_pm_check_store - * - * compute the CRC values for the memory blocks before the final - * sleep. -*/ - -void s3c_pm_check_store(void) -{ - if (crcs != NULL) - s3c_pm_run_sysram(s3c_pm_makecheck, crcs); -} - -/* in_region - * - * return TRUE if the area defined by ptr..ptr+size contains the - * what..what+whatsz -*/ - -static inline int in_region(void *ptr, int size, void *what, size_t whatsz) -{ - if ((what+whatsz) < ptr) - return 0; - - if (what > (ptr+size)) - return 0; - - return 1; -} - -/** - * s3c_pm_runcheck() - helper to check a resource on restore. - * @res: The resource to check - * @vak: Pointer to list of CRC32 values to check. - * - * Called from the s3c_pm_check_restore() via s3c_pm_run_sysram(), this - * function runs the given memory resource checking it against the stored - * CRC to ensure that memory is restored. The function tries to skip as - * many of the areas used during the suspend process. - */ -static u32 *s3c_pm_runcheck(struct resource *res, u32 *val) -{ - unsigned long addr; - unsigned long left; - void *stkpage; - void *ptr; - u32 calc; - - stkpage = (void *)((u32)&calc & ~PAGE_MASK); - - for (addr = res->start; addr < res->end; - addr += CHECK_CHUNKSIZE) { - left = res->end - addr; - - if (left > CHECK_CHUNKSIZE) - left = CHECK_CHUNKSIZE; - - ptr = phys_to_virt(addr); - - if (in_region(ptr, left, stkpage, 4096)) { - S3C_PMDBG("skipping %08lx, has stack in\n", addr); - goto skip_check; - } - - if (in_region(ptr, left, crcs, crc_size)) { - S3C_PMDBG("skipping %08lx, has crc block in\n", addr); - goto skip_check; - } - - /* calculate and check the checksum */ - - calc = crc32_le(~0, ptr, left); - if (calc != *val) { - printk(KERN_ERR "Restore CRC error at " - "%08lx (%08x vs %08x)\n", addr, calc, *val); - - S3C_PMDBG("Restore CRC error at %08lx (%08x vs %08x)\n", - addr, calc, *val); - } - - skip_check: - val++; - } - - return val; -} - -/** - * s3c_pm_check_restore() - memory check called on resume - * - * check the CRCs after the restore event and free the memory used - * to hold them -*/ -void s3c_pm_check_restore(void) -{ - if (crcs != NULL) - s3c_pm_run_sysram(s3c_pm_runcheck, crcs); -} - -/** - * s3c_pm_check_cleanup() - free memory resources - * - * Free the resources that where allocated by the suspend - * memory check code. We do this separately from the - * s3c_pm_check_restore() function as we cannot call any - * functions that might sleep during that resume. - */ -void s3c_pm_check_cleanup(void) -{ - kfree(crcs); - crcs = NULL; -} - diff --git a/arch/arm/plat-samsung/pm-debug.c b/arch/arm/plat-samsung/pm-debug.c deleted file mode 100644 index 482d53753e93..000000000000 --- a/arch/arm/plat-samsung/pm-debug.c +++ /dev/null @@ -1,80 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// -// Copyright (C) 2013 Samsung Electronics Co., Ltd. -// Tomasz Figa <t.figa@samsung.com> -// Copyright (C) 2008 Openmoko, Inc. -// Copyright (C) 2004-2008 Simtec Electronics -// Ben Dooks <ben@simtec.co.uk> -// http://armlinux.simtec.co.uk/ -// -// Samsung common power management (suspend to RAM) debug support - -#include <linux/serial_core.h> -#include <linux/serial_s3c.h> -#include <linux/io.h> - -#include <asm/mach/map.h> - -#include <plat/cpu.h> -#include <plat/pm-common.h> - -static struct pm_uart_save uart_save; - -extern void printascii(const char *); - -void s3c_pm_dbg(const char *fmt, ...) -{ - va_list va; - char buff[256]; - - va_start(va, fmt); - vsnprintf(buff, sizeof(buff), fmt, va); - va_end(va); - - printascii(buff); -} - -static inline void __iomem *s3c_pm_uart_base(void) -{ - unsigned long paddr; - unsigned long vaddr; - - debug_ll_addr(&paddr, &vaddr); - - return (void __iomem *)vaddr; -} - -void s3c_pm_save_uarts(bool is_s3c2410) -{ - void __iomem *regs = s3c_pm_uart_base(); - struct pm_uart_save *save = &uart_save; - - save->ulcon = __raw_readl(regs + S3C2410_ULCON); - save->ucon = __raw_readl(regs + S3C2410_UCON); - save->ufcon = __raw_readl(regs + S3C2410_UFCON); - save->umcon = __raw_readl(regs + S3C2410_UMCON); - save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV); - - if (!is_s3c2410) - save->udivslot = __raw_readl(regs + S3C2443_DIVSLOT); - - S3C_PMDBG("UART[%p]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n", - regs, save->ulcon, save->ucon, save->ufcon, save->ubrdiv); -} - -void s3c_pm_restore_uarts(bool is_s3c2410) -{ - void __iomem *regs = s3c_pm_uart_base(); - struct pm_uart_save *save = &uart_save; - - s3c_pm_arch_update_uart(regs, save); - - __raw_writel(save->ulcon, regs + S3C2410_ULCON); - __raw_writel(save->ucon, regs + S3C2410_UCON); - __raw_writel(save->ufcon, regs + S3C2410_UFCON); - __raw_writel(save->umcon, regs + S3C2410_UMCON); - __raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV); - - if (!is_s3c2410) - __raw_writel(save->udivslot, regs + S3C2443_DIVSLOT); -} |