493b8de938
This reverts commit f735584514.
These header changes introduce unacceptable errors:
1. The changes alter the width of the initial block comment. That will cause nxstyle failures on most of the files.
2. The third line of the header is an (optional) short description of content of the the file. This change erroneously removes that line.
Automated header file changes can screw up a lot of files, very quickly.
229 lines
8.6 KiB
C
229 lines
8.6 KiB
C
/****************************************************************************
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* boards/arm/sama5/sama5d2-xult/include/board_384mhz.h
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __BOARDS_ARM_SAMA5_SAMA5D2_XULT_INCLUDE_BOARD_384MHZ_H
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#define __BOARDS_ARM_SAMA5_SAMA5D2_XULT_INCLUDE_BOARD_384MHZ_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Clocking *****************************************************************/
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/* After power-on reset, the SAMA5 device is running on a 12MHz internal RC.
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* These definitions will configure operational clocking.
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*
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* This is an alternative slower configuration that will produce a 48MHz USB
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* clock with the required accuracy.
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* When used with OHCI, an additional requirement is the PLLACK be a multiple
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* of 48MHz.
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* This setup results in a CPU clock of 384MHz.
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*
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* MAINOSC: Frequency = 12MHz (crystal)
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* PLLA: PLL Multiplier = 64 to generate PLLACK = 768MHz
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* Master Clock (MCK): Source = PLLACK/2, Prescalar = 1, MDIV = 3 to generate
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* MCK = 128MHz
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* CPU clock = 384MHz
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*/
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/* Main oscillator register settings.
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*
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* The start up time should be should be:
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* Start Up Time = 8 * MOSCXTST / SLCK = 56 Slow Clock Cycles.
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*/
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#define BOARD_CKGR_MOR_MOSCXTST (62 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */
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/* PLLA configuration.
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*
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* Multipler = 64: PLLACK = 64 * 12MHz = 768MHz
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*/
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#define BOARD_CKGR_PLLAR_COUNT (63 << PMC_CKGR_PLLAR_COUNT_SHIFT)
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#define BOARD_CKGR_PLLAR_OUT (0)
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#define BOARD_CKGR_PLLAR_MUL (63 << PMC_CKGR_PLLAR_MUL_SHIFT)
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/* PMC master clock register settings.
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*
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* Master/Processor Clock Source Selection = PLLA
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* Master/Processor Clock Prescaler = 1
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* PLLA Divider = 2
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* Master Clock Division (MDIV) = 3
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*
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* NOTE: Bit PLLADIV2 must always be set to 1 when MDIV is set to 3.
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*
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* Prescaler input = 768MHz / 2 = 384MHz
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* Prescaler output = 384MHz / 1 = 384MHz
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* Processor Clock (PCK) = 384MHz
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* Master clock (MCK) = 396MHz / 3 = 128MHz
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*/
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#define BOARD_PMC_MCKR_CSS PMC_MCKR_CSS_PLLA
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#define BOARD_PMC_MCKR_PRES PMC_MCKR_PRES_DIV1
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#define BOARD_PMC_MCKR_PLLADIV PMC_MCKR_PLLADIV2
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#define BOARD_PMC_MCKR_MDIV PMC_MCKR_MDIV_PCKDIV3
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#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
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defined(CONFIG_SAMA5_UDPHS)
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/* For OHCI Full-speed operations, the user has to perform the following:
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*
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* 1) Enable UHP peripheral clock, bit (1 << AT91C_ID_UHPHS) in PMC_PCER
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* register.
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* 2) Select PLLACK as Input clock of OHCI part, USBS bit in PMC_USB
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* register.
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* 3) Program the OHCI clocks (UHP48M and UHP12M) with USBDIV field in
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* PMC_USB register. USBDIV value is calculated regarding the PLLACK
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* value and USB Full-speed accuracy.
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* 4) Enable the OHCI clocks, UHP bit in PMC_SCER register.
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*
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* "The USB Host controller requires 48 MHz and 12 MHz clocks for OHCI
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* full-speed operations. These clocks must be generated by a PLL with a
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* correct accuracy of <20> 0.25% thanks to USBDIV field.
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*
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* "Thus the USB Host peripheral receives three clocks from the Power
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* Management Controller (PMC): the Peripheral Clock (MCK domain), the
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* UHP48M and the UHP12M (built-in UHP48M divided by four) used by the
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* OHCI to interface with the bus USB signals (Recovered 12 MHz domain)
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* in Full-speed operations"
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*
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* USB Clock = PLLACK / (USBDIV + 1) = 48MHz
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* USBDIV = PLLACK / 48MHz - 1
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* = 15
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*
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* The maximum value of USBDIV is 15 corresponding to a divisor of 16.
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* REVISIT: However, using the divisor of (15+1) yields a frame rate
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* of 500 frames per second. A divisor of (7+1) gives the correct 1MS
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* frame rate. I cannot explain the factor of 2 difference.
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*/
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# undef BOARD_USE_UPLL /* Use PLLA as source clock */
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# define BOARD_OHCI_INPUT PMC_USB_USBS_PLLA /* Input is PLLACK */
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# if 1 /* REVISIT */
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# define BOARD_OHCI_DIVIDER (7) /* Divided by 8 */
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# else
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# define BOARD_OHCI_DIVIDER (15) /* Divided by 16 */
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# endif
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#endif
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/* ADC Configuration
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*
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* ADCClock = MCK / ((PRESCAL+1) * 2)
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*
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* Given:
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* MCK = 128MHz
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* ADCClock = 8MHz
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* Then:
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* PRESCAL = 7
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*/
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#define BOARD_ADC_PRESCAL (7)
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#define BOARD_TSD_STARTUP (40) /* 40 nanoseconds */
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#define BOARD_TSD_TRACKTIM (2000) /* Min 1<>s at 8MHz */
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#define BOARD_TSD_DEBOUNCE (10000000) /* 10 milliseconds (units nanoseconds) */
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/* Resulting frequencies */
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#define BOARD_MAINCK_FREQUENCY BOARD_MAINOSC_FREQUENCY
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#define BOARD_PLLA_FREQUENCY (768000000) /* PLLACK: 64 * 12Mhz / 1 */
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#define BOARD_PCK_FREQUENCY (384000000) /* CPU: PLLACK / 2 / 1 */
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#define BOARD_MCK_FREQUENCY (128000000) /* MCK: PLLACK / 2 / 1 / 3 */
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#define BOARD_ADCCLK_FREQUENCY (8000000) /* ADCCLK: MCK / ((7+1)*2) */
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/* Clocking to certain peripherals may be MCK/2.
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*
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* REVISIT: I am not sure why this is. Perhaps because of H32MXDIV?
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*/
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#define BOARD_PIT_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
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#define BOARD_USART_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
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#define BOARD_FLEXCOM_FREQUENCY (BOARD_MCK_FREQUENCY >> 1)
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/* HSMCI clocking
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*
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* Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock (MCK)
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* divided by (2*(CLKDIV) + CLOCKODD + 2).
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*
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* MCI_SPEED = MCK / (2*CLKDIV + CLOCKODD + 2)
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*
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* Where CLKDIV has a range of 0-255.
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*/
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/* MCK = 128MHz, CLKDIV = 159, MCI_SPEED = 128MHz / (2*159 + 0 + 2) = 400 KHz */
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#define HSMCI_INIT_CLKDIV (159 << HSMCI_MR_CLKDIV_SHIFT)
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/* MCK = 128MHz, CLKDIV = 2 w/CLOCKODD, MCI_SPEED = 128MHz /(2*2 + 1 + 2) = 18.3 MHz */
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#define HSMCI_MMCXFR_CLKDIV ((2 << HSMCI_MR_CLKDIV_SHIFT) | HSMCI_MR_CLKODD)
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/* MCK = 128MHz, CLKDIV = 2, MCI_SPEED = 128MHz /(2*2 + 0 + 2) = 21.3 MHz */
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#define HSMCI_SDXFR_CLKDIV (2 << HSMCI_MR_CLKDIV_SHIFT)
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#define HSMCI_SDWIDEXFR_CLKDIV HSMCI_SDXFR_CLKDIV
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* !__ASSEMBLY__ */
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#endif /* __BOARDS_ARM_SAMA5_SAMA5D2_XULT_INCLUDE_BOARD_384MHZ_H */
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