include/hw/sd/sd.h - qemu - Git at Google

 /*
  * 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.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)

 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);
     void (*write_data)(SDState *sd, uint8_t value);
     uint8_t (*read_data)(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;

 /* Legacy functions to be used only by non-qdevified callers */
 SDState *sd_init(BlockBackend *bs, bool is_spi);
 int sd_do_command(SDState *sd, SDRequest *req,
                   uint8_t *response);
 void sd_write_data(SDState *sd, uint8_t value);
 uint8_t sd_read_data(SDState *sd);
 void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert);
 bool sd_data_ready(SDState *sd);
 /* sd_enable should not be used -- it is only used on the nseries boards,
  * where it is part of a broken implementation of the MMC card slot switch
  * (there should be two card slots which are multiplexed to a single MMC
  * controller, but instead we model it with one card and controller and
  * disable the card when the second slot is selected, so it looks like the
  * second slot is always empty).
  */
 void sd_enable(SDState *sd, bool enable);

 /* 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);
 void sdbus_write_data(SDBus *sd, uint8_t value);
 uint8_t sdbus_read_data(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 */
	/*
	* 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.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)

	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);
	void (write_data)(SDState sd, uint8_t value);
	uint8_t (read_data)(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;

	/* Legacy functions to be used only by non-qdevified callers */
	SDState sd_init(BlockBackend bs, bool is_spi);
	int sd_do_command(SDState sd, SDRequest req,
	uint8_t *response);
	void sd_write_data(SDState *sd, uint8_t value);
	uint8_t sd_read_data(SDState *sd);
	void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert);
	bool sd_data_ready(SDState *sd);
	/* sd_enable should not be used -- it is only used on the nseries boards,
	* where it is part of a broken implementation of the MMC card slot switch
	* (there should be two card slots which are multiplexed to a single MMC
	* controller, but instead we model it with one card and controller and
	* disable the card when the second slot is selected, so it looks like the
	* second slot is always empty).
	*/
	void sd_enable(SDState *sd, bool enable);

	/* 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);
	void sdbus_write_data(SDBus *sd, uint8_t value);
	uint8_t sdbus_read_data(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 */