| 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 control module.
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| 34 | */
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| 35 |
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| 36 | #ifndef _KERN_AM335X_CTRL_MODULE_H_
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| 37 | #define _KERN_AM335X_CTRL_MODULE_H_
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| 38 |
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| 39 | #include <typedefs.h>
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| 40 | #include "ctrl_module_regs.h"
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| 41 |
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| 42 | #define AM335x_CTRL_MODULE_BASE_ADDRESS 0x44E10000
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| 43 | #define AM335x_CTRL_MODULE_SIZE 131072 /* 128 Kb */
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| 44 |
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| 45 | typedef ioport32_t am335x_ctrl_module_t;
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| 46 |
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| 47 | static unsigned am335x_ctrl_module_clock_freq_get(am335x_ctrl_module_t *base)
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| 48 | {
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| 49 | unsigned const control_status = *AM335x_CTRL_MODULE_REG_ADDR(base,
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| 50 | CONTROL_SYSCONFIG);
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| 51 | unsigned const sysboot1 = (control_status >> 22) & 0x03;
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| 52 |
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| 53 | switch (sysboot1) {
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| 54 | default:
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| 55 | case 0:
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| 56 | return 19200000; /* 19.2 Mhz */
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| 57 | case 1:
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| 58 | return 24000000; /* 24 Mhz */
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| 59 | case 2:
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| 60 | return 25000000; /* 25 Mhz */
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| 61 | case 3:
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| 62 | return 26000000; /* 26 Mhz */
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| 63 | }
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| 64 | }
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| 65 |
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| 66 | #endif
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| 67 |
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| 68 | /**
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| 69 | * @}
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| 70 | */
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