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222 lines
9.4 KiB
C
222 lines
9.4 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2013 - 2015 Xilinx, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Use of the Software is limited solely to applications:
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* (a) running on a Xilinx device, or
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* (b) that interact with a Xilinx device through a bus or interconnect.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of the Xilinx shall not be used
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* in advertising or otherwise to promote the sale, use or other dealings in
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* this Software without prior written authorization from Xilinx.
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*
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******************************************************************************/
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/*****************************************************************************/
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/**
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*
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* @file xsdps.h
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* @addtogroup sdps_v2_5
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* @{
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* @details
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*
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* This file contains the implementation of XSdPs driver.
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* This driver is used initialize read from and write to the SD card.
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* Features such as switching bus width to 4-bit and switching to high speed,
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* changing clock frequency, block size etc. are supported.
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* SD 2.0 uses 1/4 bus width and speeds of 25/50KHz. Initialization, however
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* is done using 1-bit bus width and 400KHz clock frequency.
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* SD commands are classified as broadcast and addressed. Commands can be
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* those with response only (using only command line) or
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* response + data (using command and data lines).
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* Only one command can be sent at a time. During a data transfer however,
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* when dsta lines are in use, certain commands (which use only the command
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* line) can be sent, most often to obtain status.
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* This driver does not support multi card slots at present.
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*
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* Intialization:
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* This includes initialization on the host controller side to select
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* clock frequency, bus power and default transfer related parameters.
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* The default voltage is 3.3V.
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* On the SD card side, the initialization and identification state diagram is
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* implemented. This resets the card, gives it a unique address/ID and
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* identifies key card related specifications.
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*
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* Data transfer:
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* The SD card is put in tranfer state to read from or write to it.
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* The default block size is 512 bytes and if supported,
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* default bus width is 4-bit and bus speed is High speed.
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* The read and write functions are implemented in polled mode using ADMA2.
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*
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* At any point, when key parameters such as block size or
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* clock/speed or bus width are modified, this driver takes care of
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* maintaining the same selection on host and card.
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* All error bits in host controller are monitored by the driver and in the
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* event one of them is set, driver will clear the interrupt status and
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* communicate failure to the upper layer.
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*
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* File system use:
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* This driver can be used with xilffs library to read and write files to SD.
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* (Please refer to procedure in diskio.c). The file system read/write example
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* in polled mode can used for reference.
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*
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* There is no example for using SD driver without file system at present.
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* However, the driver can be used without the file system. The glue layer
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* in filesytem can be used as reference for the same. The block count
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* passed to the read/write function in one call is limited by the ADMA2
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* descriptor table and hence care will have to be taken to call read/write
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* API's in a loop for large file sizes.
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*
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* Interrupt mode is not supported because it offers no improvement when used
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* with file system.
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*
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* eMMC support:
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* SD driver supports SD and eMMC based on the "enable MMC" parameter in SDK.
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* The features of eMMC supported by the driver will depend on those supported
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* by the host controller. The current driver supports read/write on eMMC card
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* using 4-bit and high speed mode currently.
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*
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* Features not supported include - card write protect, password setting,
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* lock/unlock, interrupts, SDMA mode, programmed I/O mode and
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* 64-bit addressed ADMA2, erase/pre-erase commands.
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*
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* <pre>
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* MODIFICATION HISTORY:
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*
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* Ver Who Date Changes
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* ----- --- -------- -----------------------------------------------
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* 1.00a hk/sg 10/17/13 Initial release
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* 2.0 hk 03/07/14 Version number revised.
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* 2.1 hk 04/18/14 Increase sleep for eMMC switch command.
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* Add sleep for microblaze designs. CR# 781117.
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* 2.2 hk 07/28/14 Make changes to enable use of data cache.
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* 2.3 sk 09/23/14 Send command for relative card address
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* when re-initialization is done.CR# 819614.
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* Use XSdPs_Change_ClkFreq API whenever changing
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* clock.CR# 816586.
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* 2.4 sk 12/04/14 Added support for micro SD without
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* WP/CD. CR# 810655.
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* Checked for DAT Inhibit mask instead of CMD
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* Inhibit mask in Cmd Transfer API.
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* Added Support for SD Card v1.0
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* 2.5 sg 07/09/15 Added SD 3.0 features
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* kvn 07/15/15 Modified the code according to MISRAC-2012.
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* 2.6 sk 10/12/15 Added support for SD card v1.0 CR# 840601.
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*
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* </pre>
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*
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******************************************************************************/
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#ifndef SDPS_H_
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#define SDPS_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "xstatus.h"
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#include "xsdps_hw.h"
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#include <string.h>
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/************************** Constant Definitions *****************************/
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#define XSDPS_CT_ERROR 0x2U /**< Command timeout flag */
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/**************************** Type Definitions *******************************/
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/**
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* This typedef contains configuration information for the device.
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*/
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typedef struct {
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u16 DeviceId; /**< Unique ID of device */
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u32 BaseAddress; /**< Base address of the device */
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u32 InputClockHz; /**< Input clock frequency */
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u32 CardDetect; /**< Card Detect */
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u32 WriteProtect; /**< Write Protect */
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} XSdPs_Config;
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/* ADMA2 descriptor table */
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typedef struct {
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u16 Attribute; /**< Attributes of descriptor */
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u16 Length; /**< Length of current dma transfer */
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u32 Address; /**< Address of current dma transfer */
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} XSdPs_Adma2Descriptor;
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/**
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* The XSdPs driver instance data. The user is required to allocate a
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* variable of this type for every SD device in the system. A pointer
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* to a variable of this type is then passed to the driver API functions.
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*/
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typedef struct {
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XSdPs_Config Config; /**< Configuration structure */
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u32 IsReady; /**< Device is initialized and ready */
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u32 Host_Caps; /**< Capabilities of host controller */
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u32 Host_CapsExt; /**< Extended Capabilities */
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u32 HCS; /**< High capacity support in card */
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u8 CardType; /**< Type of card - SD/MMC/eMMC */
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u8 Card_Version; /**< Card version */
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u8 HC_Version; /**< Host controller version */
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u8 BusWidth; /**< Current operating bus width */
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u32 BusSpeed; /**< Current operating bus speed */
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u8 Switch1v8; /**< 1.8V Switch support */
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u32 CardID[4]; /**< Card ID Register */
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u32 RelCardAddr; /**< Relative Card Address */
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u32 CardSpecData[4]; /**< Card Specific Data Register */
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u32 SdCardConfig; /**< Sd Card Configuration Register */
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/**< ADMA Descriptors */
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#ifdef __ICCARM__
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#pragma data_alignment = 32
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XSdPs_Adma2Descriptor Adma2_DescrTbl[32];
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#pragma data_alignment = 4
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#else
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XSdPs_Adma2Descriptor Adma2_DescrTbl[32] __attribute__ ((aligned(32)));
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#endif
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} XSdPs;
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/***************** Macros (Inline Functions) Definitions *********************/
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/************************** Function Prototypes ******************************/
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XSdPs_Config *XSdPs_LookupConfig(u16 DeviceId);
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s32 XSdPs_CfgInitialize(XSdPs *InstancePtr, XSdPs_Config *ConfigPtr,
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u32 EffectiveAddr);
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s32 XSdPs_SdCardInitialize(XSdPs *InstancePtr);
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s32 XSdPs_ReadPolled(XSdPs *InstancePtr, u32 Arg, u32 BlkCnt, u8 *Buff);
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s32 XSdPs_WritePolled(XSdPs *InstancePtr, u32 Arg, u32 BlkCnt, const u8 *Buff);
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s32 XSdPs_SetBlkSize(XSdPs *InstancePtr, u16 BlkSize);
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s32 XSdPs_Select_Card (XSdPs *InstancePtr);
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s32 XSdPs_Change_ClkFreq(XSdPs *InstancePtr, u32 SelFreq);
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s32 XSdPs_Change_BusWidth(XSdPs *InstancePtr);
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s32 XSdPs_Change_BusSpeed(XSdPs *InstancePtr);
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s32 XSdPs_Get_BusWidth(XSdPs *InstancePtr, u8 *SCR);
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s32 XSdPs_Get_BusSpeed(XSdPs *InstancePtr, u8 *ReadBuff);
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s32 XSdPs_Pullup(XSdPs *InstancePtr);
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s32 XSdPs_MmcCardInitialize(XSdPs *InstancePtr);
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s32 XSdPs_CardInitialize(XSdPs *InstancePtr);
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s32 XSdPs_Get_Mmc_ExtCsd(XSdPs *InstancePtr, u8 *ReadBuff);
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/* Wait for Command/Transfer Complete. */
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s32 XSdPs_Wait_For(XSdPs *InstancePtr, u32 Mask, u32 Wait);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SD_H_ */
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/** @} */
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