| 1 | /*
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| 2 | * Copyright (c) 2013 Maurizio Lombardi
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 | /** @addtogroup genarch
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| 29 | * @{
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| 30 | */
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| 31 | /**
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| 32 | * @file
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| 33 | * @brief Texas Instruments AM335x DPLL.
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| 34 | */
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| 35 |
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| 36 | #ifndef _KERN_AM335X_CM_DPLL_H_
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| 37 | #define _KERN_AM335X_CM_DPLL_H_
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| 38 |
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| 39 | #include "cm_dpll_regs.h"
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| 40 | #include "timer.h"
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| 41 |
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| 42 | #define AM335x_CM_DPLL_BASE_ADDRESS 0x44E00500
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| 43 | #define AM335x_CM_DPLL_SIZE 256
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| 44 |
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| 45 | static ioport32_t *am335x_cm_dpll_timer_reg_get(am335x_cm_dpll_regs_t *cm,
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| 46 | am335x_timer_id_t id)
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| 47 | {
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| 48 | switch (id) {
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| 49 | default:
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| 50 | return NULL;
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| 51 | case DMTIMER2:
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| 52 | return &cm->clksel_timer2;
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| 53 | case DMTIMER3:
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| 54 | return &cm->clksel_timer3;
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| 55 | case DMTIMER4:
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| 56 | return &cm->clksel_timer4;
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| 57 | case DMTIMER5:
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| 58 | return &cm->clksel_timer5;
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| 59 | case DMTIMER6:
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| 60 | return &cm->clksel_timer6;
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| 61 | case DMTIMER7:
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| 62 | return &cm->clksel_timer7;
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| 63 | }
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| 64 | }
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| 65 |
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| 66 | static void am335x_clock_source_select(am335x_cm_dpll_regs_t *cm,
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| 67 | am335x_timer_id_t id, am335x_clk_src_t src)
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| 68 | {
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| 69 | ioport32_t *reg = am335x_cm_dpll_timer_reg_get(cm, id);
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| 70 | if (!reg)
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| 71 | return;
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| 72 |
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| 73 | *reg = (*reg & ~0x03) | src;
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| 74 | }
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| 75 |
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| 76 | #endif
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| 77 |
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| 78 | /**
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| 79 | * @}
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| 80 | */
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| 81 |
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