8b05938bcb552fc88eabe5f026ba811f91eaa3f3
[mirror_edk2.git] / BeagleBoardPkg / Sec / Clock.c
1 /** @file
2
3 Copyright (c) 2008-2009, Apple Inc. All rights reserved.
4
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15 #include <Library/IoLib.h>
16 #include <Library/DebugLib.h>
17
18 #include <Omap3530/Omap3530.h>
19
20 VOID
21 ClockInit (
22 VOID
23 )
24 {
25 //DPLL1 - DPLL4 are configured part of Configuration header which OMAP3 ROM parses.
26
27 // Enable PLL5 and set to 120 MHz as a reference clock.
28 MmioWrite32 (CM_CLKSEL4_PLL, CM_CLKSEL_PLL_MULT(120) | CM_CLKSEL_PLL_DIV(13));
29 MmioWrite32 (CM_CLKSEL5_PLL, CM_CLKSEL_DIV_120M(1));
30 MmioWrite32 (CM_CLKEN2_PLL, CM_CLKEN_FREQSEL_075_100 | CM_CLKEN_ENABLE);
31
32 // Turn on functional & interface clocks to the USBHOST power domain
33 MmioOr32(CM_FCLKEN_USBHOST, CM_FCLKEN_USBHOST_EN_USBHOST2_ENABLE
34 | CM_FCLKEN_USBHOST_EN_USBHOST1_ENABLE);
35 MmioOr32(CM_ICLKEN_USBHOST, CM_ICLKEN_USBHOST_EN_USBHOST_ENABLE);
36
37 // Turn on functional & interface clocks to the USBTLL block.
38 MmioOr32(CM_FCLKEN3_CORE, CM_FCLKEN3_CORE_EN_USBTLL_ENABLE);
39 MmioOr32(CM_ICLKEN3_CORE, CM_ICLKEN3_CORE_EN_USBTLL_ENABLE);
40
41 // Turn on functional & interface clocks to MMC1 and I2C1 modules.
42 MmioOr32(CM_FCLKEN1_CORE, CM_FCLKEN1_CORE_EN_MMC1_ENABLE
43 | CM_FCLKEN1_CORE_EN_I2C1_ENABLE);
44 MmioOr32(CM_ICLKEN1_CORE, CM_ICLKEN1_CORE_EN_MMC1_ENABLE
45 | CM_ICLKEN1_CORE_EN_I2C1_ENABLE);
46
47 // Turn on functional & interface clocks to various Peripherals.
48 MmioOr32(CM_FCLKEN_PER, CM_FCLKEN_PER_EN_UART3_ENABLE
49 | CM_FCLKEN_PER_EN_GPT3_ENABLE
50 | CM_FCLKEN_PER_EN_GPT4_ENABLE
51 | CM_FCLKEN_PER_EN_GPIO2_ENABLE
52 | CM_FCLKEN_PER_EN_GPIO3_ENABLE
53 | CM_FCLKEN_PER_EN_GPIO4_ENABLE
54 | CM_FCLKEN_PER_EN_GPIO5_ENABLE
55 | CM_FCLKEN_PER_EN_GPIO6_ENABLE);
56 MmioOr32(CM_ICLKEN_PER, CM_ICLKEN_PER_EN_UART3_ENABLE
57 | CM_ICLKEN_PER_EN_GPT3_ENABLE
58 | CM_ICLKEN_PER_EN_GPT4_ENABLE
59 | CM_ICLKEN_PER_EN_GPIO2_ENABLE
60 | CM_ICLKEN_PER_EN_GPIO3_ENABLE
61 | CM_ICLKEN_PER_EN_GPIO4_ENABLE
62 | CM_ICLKEN_PER_EN_GPIO5_ENABLE
63 | CM_ICLKEN_PER_EN_GPIO6_ENABLE);
64
65 // Turn on functional & inteface clocks to various wakeup modules.
66 MmioOr32(CM_FCLKEN_WKUP, CM_FCLKEN_WKUP_EN_GPIO1_ENABLE
67 | CM_FCLKEN_WKUP_EN_WDT2_ENABLE);
68 MmioOr32(CM_ICLKEN_WKUP, CM_ICLKEN_WKUP_EN_GPIO1_ENABLE
69 | CM_ICLKEN_WKUP_EN_WDT2_ENABLE);
70 }