/* * (C) Copyright 2003 * Texas Instruments <www.ti.com> * * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Marius Groeger <mgroeger@sysgo.de> * * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Alex Zuepke <azu@sysgo.de> * * (C) Copyright 2002-2004 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> * * (C) Copyright 2004 * Philippe Robin, ARM Ltd. <philippe.robin@arm.com> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #define TIMER_ENABLE (1 << 7) #define TIMER_MODE_MSK (1 << 6) #define TIMER_MODE_FR (0 << 6) #define TIMER_MODE_PD (1 << 6) #define TIMER_INT_EN (1 << 5) #define TIMER_PRS_MSK (3 << 2) #define TIMER_PRS_8S (1 << 3) #define TIMER_SIZE_MSK (1 << 2) #define TIMER_ONE_SHT (1 << 0) int timer_init (void) { ulong tmr_ctrl_val; /* 1st disable the Timer */ tmr_ctrl_val = *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8); tmr_ctrl_val &= ~TIMER_ENABLE; *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = tmr_ctrl_val; /* * The Timer Control Register has one Undefined/Shouldn't Use Bit * So we should do read/modify/write Operation */ /* * Timer Mode : Free Running * Interrupt : Disabled * Prescale : 8 Stage, Clk/256 * Tmr Siz : 16 Bit Counter * Tmr in Wrapping Mode */ tmr_ctrl_val = *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8); tmr_ctrl_val &= ~(TIMER_MODE_MSK | TIMER_INT_EN | TIMER_PRS_MSK | TIMER_SIZE_MSK | TIMER_ONE_SHT ); tmr_ctrl_val |= (TIMER_ENABLE | TIMER_PRS_8S); *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = tmr_ctrl_val; return 0; }