From c74b2108e31fe09bd1c5d291c3cf360510d4f13e Mon Sep 17 00:00:00 2001 From: Sergey Kubushyn Date: Fri, 10 Aug 2007 20:26:18 +0200 Subject: [ARM] TI DaVinci support, hopefully final Add support for the following DaVinci boards: - DV_EVM - SCHMOOGIE - SONATA Changes: - Split into separate board directories - Removed changes to MTD_DEBUG (or whatever it's called) - New CONFIG_CMD party line followed - Some cosmetic fixes, cleanup etc. - Patches against the latest U-Boot tree as of now. - Fixed CONFIG_CMD_NET in net files. - Fixed CONFIG_CMD_EEPROM for schmoogie. - Made sure it compiles and works (forceenv() link problem) on SCHMOOGIE and DV_EVM. Can't check if it works on SONATA, don't have a board any more, but it at least compiles. Here is an excerpt from session log on SCHMOOGIE... U-Boot 1.2.0-g6c33c785-dirty (Aug 7 2007 - 13:07:17) DRAM: 128 MB NAND: 128 MiB In: serial Out: serial Err: serial ARM Clock : 297MHz DDR Clock : 162MHz ETH PHY : DP83848 @ 0x01 U-Boot > iprobe Valid chip addresses: 1B 38 3A 3D 3F 50 5D 6F U-Boot > ping 192.168.253.10 host 192.168.253.10 is alive U-Boot > Signed-off-by: Sergey Kubushyn Acked-by: Dirk Behme Acked-by: Zach Sadecki Acked-by: Stefan Roese --- cpu/arm926ejs/davinci/timer.c | 165 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 165 insertions(+) create mode 100644 cpu/arm926ejs/davinci/timer.c (limited to 'cpu/arm926ejs/davinci/timer.c') diff --git a/cpu/arm926ejs/davinci/timer.c b/cpu/arm926ejs/davinci/timer.c new file mode 100644 index 0000000..c6b1dda --- /dev/null +++ b/cpu/arm926ejs/davinci/timer.c @@ -0,0 +1,165 @@ +/* + * (C) Copyright 2003 + * Texas Instruments + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH + * Marius Groeger + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH + * Alex Zuepke + * + * (C) Copyright 2002-2004 + * Gary Jennejohn, DENX Software Engineering, + * + * (C) Copyright 2004 + * Philippe Robin, ARM Ltd. + * + * Copyright (C) 2007 Sergey Kubushyn + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include + +typedef volatile struct { + u_int32_t pid12; + u_int32_t emumgt_clksped; + u_int32_t gpint_en; + u_int32_t gpdir_dat; + u_int32_t tim12; + u_int32_t tim34; + u_int32_t prd12; + u_int32_t prd34; + u_int32_t tcr; + u_int32_t tgcr; + u_int32_t wdtcr; + u_int32_t tlgc; + u_int32_t tlmr; +} davinci_timer; + +davinci_timer *timer = (davinci_timer *)CFG_TIMERBASE; + +#define TIMER_LOAD_VAL (CFG_HZ_CLOCK / CFG_HZ) +#define READ_TIMER timer->tim34 + +static ulong timestamp; +static ulong lastinc; + +int timer_init(void) +{ + /* We are using timer34 in unchained 32-bit mode, full speed */ + timer->tcr = 0x0; + timer->tgcr = 0x0; + timer->tgcr = 0x06; + timer->tim34 = 0x0; + timer->prd34 = TIMER_LOAD_VAL; + lastinc = 0; + timer->tcr = 0x80 << 16; + timestamp = 0; + + return(0); +} + +void reset_timer(void) +{ + reset_timer_masked(); +} + +ulong get_timer(ulong base) +{ + return(get_timer_masked() - base); +} + +void set_timer(ulong t) +{ + timestamp = t; +} + +void udelay(unsigned long usec) +{ + udelay_masked(usec); +} + +void reset_timer_masked(void) +{ + lastinc = READ_TIMER; + timestamp = 0; +} + +ulong get_timer_raw(void) +{ + ulong now = READ_TIMER; + + if (now >= lastinc) { + /* normal mode */ + timestamp += now - lastinc; + } else { + /* overflow ... */ + timestamp += now + TIMER_LOAD_VAL - lastinc; + } + lastinc = now; + return timestamp; +} + +ulong get_timer_masked(void) +{ + return(get_timer_raw() / TIMER_LOAD_VAL); +} + +void udelay_masked(unsigned long usec) +{ + ulong tmo; + ulong endtime; + signed long diff; + + tmo = CFG_HZ_CLOCK / 1000; + tmo *= usec; + tmo /= 1000; + + endtime = get_timer_raw() + tmo; + + do { + ulong now = get_timer_raw(); + diff = endtime - now; + } while (diff >= 0); +} + +/* + * This function is derived from PowerPC code (read timebase as long long). + * On ARM it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return(get_timer(0)); +} + +/* + * This function is derived from PowerPC code (timebase clock frequency). + * On ARM it returns the number of timer ticks per second. + */ +ulong get_tbclk(void) +{ + ulong tbclk; + + tbclk = CFG_HZ; + return(tbclk); +} -- cgit v1.1