// 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 <linux/soc/samsung/s3c-pm.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); }