| 1 | /* |
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| 2 | * (C) Copyright 2006 |
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| 3 | * Stefan Roese, DENX Software Engineering, sr@denx.de. |
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| 4 | * |
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| 5 | * (C) Copyright 2002 |
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| 6 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
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| 7 | * Marius Groeger <mgroeger@sysgo.de> |
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| 8 | * |
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| 9 | * (C) Copyright 2002 |
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| 10 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
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| 11 | * Alex Zuepke <azu@sysgo.de> |
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| 12 | * |
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| 13 | * See file CREDITS for list of people who contributed to this |
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| 14 | * project. |
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| 15 | * |
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| 16 | * This program is free software; you can redistribute it and/or |
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| 17 | * modify it under the terms of the GNU General Public License as |
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| 18 | * published by the Free Software Foundation; either version 2 of |
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| 19 | * the License, or (at your option) any later version. |
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| 20 | * |
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| 21 | * This program is distributed in the hope that it will be useful, |
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| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 24 | * GNU General Public License for more details. |
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| 25 | * |
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| 26 | * You should have received a copy of the GNU General Public License |
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| 27 | * along with this program; if not, write to the Free Software |
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| 28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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| 29 | * MA 02111-1307 USA |
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| 30 | */ |
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| 31 | |
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| 32 | #include <common.h> |
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| 33 | #include <asm/arch/ixp425.h> |
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| 34 | |
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| 35 | #ifndef CONFIG_USE_IRQ |
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| 36 | ulong get_timer (ulong base) |
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| 37 | { |
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| 38 | return get_timer_masked () - base; |
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| 39 | } |
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| 40 | |
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| 41 | void ixp425_udelay(unsigned long usec) |
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| 42 | { |
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| 43 | /* |
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| 44 | * This function has a max usec, but since it is called from udelay |
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| 45 | * we should not have to worry... be happy |
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| 46 | */ |
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| 47 | unsigned long usecs = CFG_HZ/1000000L & ~IXP425_OST_RELOAD_MASK; |
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| 48 | |
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| 49 | *IXP425_OSST = IXP425_OSST_TIMER_1_PEND; |
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| 50 | usecs |= IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE; |
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| 51 | *IXP425_OSRT1 = usecs; |
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| 52 | while (!(*IXP425_OSST & IXP425_OSST_TIMER_1_PEND)); |
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| 53 | } |
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| 54 | |
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| 55 | void udelay (unsigned long usec) |
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| 56 | { |
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| 57 | while (usec--) ixp425_udelay(1); |
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| 58 | } |
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| 59 | |
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| 60 | static ulong reload_constant = 0xfffffff0; |
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| 61 | |
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| 62 | void reset_timer_masked (void) |
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| 63 | { |
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| 64 | ulong reload = reload_constant | IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE; |
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| 65 | |
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| 66 | *IXP425_OSST = IXP425_OSST_TIMER_1_PEND; |
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| 67 | *IXP425_OSRT1 = reload; |
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| 68 | } |
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| 69 | |
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| 70 | ulong get_timer_masked (void) |
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| 71 | { |
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| 72 | /* |
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| 73 | * Note that it is possible for this to wrap! |
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| 74 | * In this case we return max. |
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| 75 | */ |
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| 76 | ulong current = *IXP425_OST1; |
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| 77 | if (*IXP425_OSST & IXP425_OSST_TIMER_1_PEND) |
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| 78 | { |
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| 79 | return reload_constant; |
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| 80 | } |
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| 81 | return (reload_constant - current); |
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| 82 | } |
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| 83 | #endif /* #ifndef CONFIG_USE_IRQ */ |
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