/*
* SD Memory Card emulation. Mostly correct for MMC too.
*
* Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef HW_SD_H
#define HW_SD_H
#include "hw/qdev-core.h"
#define OUT_OF_RANGE (1 << 31)
#define ADDRESS_ERROR (1 << 30)
#define BLOCK_LEN_ERROR (1 << 29)
#define ERASE_SEQ_ERROR (1 << 28)
#define ERASE_PARAM (1 << 27)
#define WP_VIOLATION (1 << 26)
#define CARD_IS_LOCKED (1 << 25)
#define LOCK_UNLOCK_FAILED (1 << 24)
#define COM_CRC_ERROR (1 << 23)
#define ILLEGAL_COMMAND (1 << 22)
#define CARD_ECC_FAILED (1 << 21)
#define CC_ERROR (1 << 20)
#define SD_ERROR (1 << 19)
#define CID_CSD_OVERWRITE (1 << 16)
#define WP_ERASE_SKIP (1 << 15)
#define CARD_ECC_DISABLED (1 << 14)
#define ERASE_RESET (1 << 13)
#define CURRENT_STATE (7 << 9)
#define READY_FOR_DATA (1 << 8)
#define APP_CMD (1 << 5)
#define AKE_SEQ_ERROR (1 << 3)
enum SDPhySpecificationVersion {
SD_PHY_SPECv1_10_VERS = 1,
SD_PHY_SPECv2_00_VERS = 2,
SD_PHY_SPECv3_01_VERS = 3,
};
typedef enum {
SD_VOLTAGE_0_4V = 400, /* currently not supported */
SD_VOLTAGE_1_8V = 1800,
SD_VOLTAGE_3_0V = 3000,
SD_VOLTAGE_3_3V = 3300,
} sd_voltage_mv_t;
typedef enum {
UHS_NOT_SUPPORTED = 0,
UHS_I = 1,
UHS_II = 2, /* currently not supported */
UHS_III = 3, /* currently not supported */
} sd_uhs_mode_t;
typedef enum {
sd_none = -1,
sd_bc = 0, /* broadcast -- no response */
sd_bcr, /* broadcast with response */
sd_ac, /* addressed -- no data transfer */
sd_adtc, /* addressed with data transfer */
} sd_cmd_type_t;
typedef struct {
uint8_t cmd;
uint32_t arg;
uint8_t crc;
} SDRequest;
typedef struct SDState SDState;
typedef struct SDBus SDBus;
#define TYPE_SD_CARD "sd-card"
#define SD_CARD(obj) OBJECT_CHECK(SDState, (obj), TYPE_SD_CARD)
#define SD_CARD_CLASS(klass) \
OBJECT_CLASS_CHECK(SDCardClass, (klass), TYPE_SD_CARD)
#define SD_CARD_GET_CLASS(obj) \
OBJECT_GET_CLASS(SDCardClass, (obj), TYPE_SD_CARD)
typedef struct {
/*< private >*/
DeviceClass parent_class;
/*< public >*/
int (*do_command)(SDState *sd, SDRequest *req, uint8_t *response);
/**
* Write a byte to a SD card.
* @sd: card
* @value: byte to write
*
* Write a byte on the data lines of a SD card.
*/
void (*write_byte)(SDState *sd, uint8_t value);
/**
* Read a byte from a SD card.
* @sd: card
*
* Read a byte from the data lines of a SD card.
*
* Return: byte value read
*/
uint8_t (*read_byte)(SDState *sd);
bool (*data_ready)(SDState *sd);
void (*set_voltage)(SDState *sd, uint16_t millivolts);
uint8_t (*get_dat_lines)(SDState *sd);
bool (*get_cmd_line)(SDState *sd);
void (*enable)(SDState *sd, bool enable);
bool (*get_inserted)(SDState *sd);
bool (*get_readonly)(SDState *sd);
} SDCardClass;
#define TYPE_SD_BUS "sd-bus"
#define SD_BUS(obj) OBJECT_CHECK(SDBus, (obj), TYPE_SD_BUS)
#define SD_BUS_CLASS(klass) OBJECT_CLASS_CHECK(SDBusClass, (klass), TYPE_SD_BUS)
#define SD_BUS_GET_CLASS(obj) OBJECT_GET_CLASS(SDBusClass, (obj), TYPE_SD_BUS)
struct SDBus {
BusState qbus;
};
typedef struct {
/*< private >*/
BusClass parent_class;
/*< public >*/
/* These methods are called by the SD device to notify the controller
* when the card insertion or readonly status changes
*/
void (*set_inserted)(DeviceState *dev, bool inserted);
void (*set_readonly)(DeviceState *dev, bool readonly);
} SDBusClass;
/* Functions to be used by qdevified callers (working via
* an SDBus rather than directly with SDState)
*/
void sdbus_set_voltage(SDBus *sdbus, uint16_t millivolts);
uint8_t sdbus_get_dat_lines(SDBus *sdbus);
bool sdbus_get_cmd_line(SDBus *sdbus);
int sdbus_do_command(SDBus *sd, SDRequest *req, uint8_t *response);
/**
* Write a byte to a SD bus.
* @sd: bus
* @value: byte to write
*
* Write a byte on the data lines of a SD bus.
*/
void sdbus_write_byte(SDBus *sd, uint8_t value);
/**
* Read a byte from a SD bus.
* @sd: bus
*
* Read a byte from the data lines of a SD bus.
*
* Return: byte value read
*/
uint8_t sdbus_read_byte(SDBus *sd);
/**
* Write data to a SD bus.
* @sdbus: bus
* @buf: data to write
* @length: number of bytes to write
*
* Write multiple bytes of data on the data lines of a SD bus.
*/
void sdbus_write_data(SDBus *sdbus, const void *buf, size_t length);
/**
* Read data from a SD bus.
* @sdbus: bus
* @buf: buffer to read data into
* @length: number of bytes to read
*
* Read multiple bytes of data on the data lines of a SD bus.
*/
void sdbus_read_data(SDBus *sdbus, void *buf, size_t length);
bool sdbus_data_ready(SDBus *sd);
bool sdbus_get_inserted(SDBus *sd);
bool sdbus_get_readonly(SDBus *sd);
/**
* sdbus_reparent_card: Reparent an SD card from one controller to another
* @from: controller bus to remove card from
* @to: controller bus to move card to
*
* Reparent an SD card, effectively unplugging it from one controller
* and inserting it into another. This is useful for SoCs like the
* bcm2835 which have two SD controllers and connect a single SD card
* to them, selected by the guest reprogramming GPIO line routing.
*/
void sdbus_reparent_card(SDBus *from, SDBus *to);
/* Functions to be used by SD devices to report back to qdevified controllers */
void sdbus_set_inserted(SDBus *sd, bool inserted);
void sdbus_set_readonly(SDBus *sd, bool inserted);
#endif /* HW_SD_H */
