/* * SD Memory Card emulation. Mostly correct for MMC too. * * Copyright (c) 2006 Andrzej Zaborowski * * 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" #include "qom/object.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; #define TYPE_SD_CARD "sd-card" typedef struct SDCardClass SDCardClass; DECLARE_OBJ_CHECKERS(SDState, SDCardClass, SD_CARD, TYPE_SD_CARD) struct SDCardClass { /*< 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); }; #define TYPE_SD_BUS "sd-bus" OBJECT_DECLARE_TYPE(SDBus, SDBusClass, sd_bus, SD_BUS) struct SDBus { BusState qbus; }; struct SDBusClass { /*< 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); }; /* 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 */