qemu

sd.h (6739B)

---

 /*
  * 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"
 #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;
 
 
 #define TYPE_SD_CARD "sd-card"
 OBJECT_DECLARE_TYPE(SDState, SDCardClass, 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 (*receive_ready)(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)
 
 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_receive_ready(SDBus *sd);
 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 */