openpcd/firmware/src/picc/pll.c @ master
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/* PLL routines for OpenPICC
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* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sys/types.h>
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#include <lib_AT91SAM7.h>
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#include <os/pio_irq.h>
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#include <os/dbgu.h>
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#include <os/led.h>
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#include "../openpcd.h"
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void pll_inhibit(int inhibit) |
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{
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if (inhibit) |
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AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPICC_PIO_PLL_INHIBIT); |
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else
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AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPICC_PIO_PLL_INHIBIT); |
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}
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int pll_is_locked(void) |
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{
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return AT91F_PIO_IsInputSet(AT91C_BASE_PIOA, OPENPICC_PIO_PLL_LOCK); |
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}
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static void pll_lock_change_cb(uint32_t pio) |
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{
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DEBUGPCRF("PLL LOCK: %d", pll_is_locked()); |
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#if 1
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if (pll_is_locked()) |
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led_switch(2, 1); |
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else
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led_switch(2, 0); |
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#endif
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}
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void pll_init(void) |
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{
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AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPICC_PIO_PLL_INHIBIT); |
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AT91F_PIO_CfgInput(AT91C_BASE_PIOA, OPENPICC_PIO_PLL_LOCK); |
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pll_inhibit(0); |
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pio_irq_register(OPENPICC_PIO_PLL_LOCK, &pll_lock_change_cb); |
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pio_irq_enable(OPENPICC_PIO_PLL_LOCK); |
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}
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