1 /* 2 * SD Memory Card emulation. Mostly correct for MMC too. 3 * 4 * Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 19 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 20 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR 21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 25 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef HW_SD_H 31 #define HW_SD_H 32 33 #include "hw/qdev-core.h" 34 #include "qom/object.h" 35 36 #define OUT_OF_RANGE (1 << 31) 37 #define ADDRESS_ERROR (1 << 30) 38 #define BLOCK_LEN_ERROR (1 << 29) 39 #define ERASE_SEQ_ERROR (1 << 28) 40 #define ERASE_PARAM (1 << 27) 41 #define WP_VIOLATION (1 << 26) 42 #define CARD_IS_LOCKED (1 << 25) 43 #define LOCK_UNLOCK_FAILED (1 << 24) 44 #define COM_CRC_ERROR (1 << 23) 45 #define ILLEGAL_COMMAND (1 << 22) 46 #define CARD_ECC_FAILED (1 << 21) 47 #define CC_ERROR (1 << 20) 48 #define SD_ERROR (1 << 19) 49 #define CID_CSD_OVERWRITE (1 << 16) 50 #define WP_ERASE_SKIP (1 << 15) 51 #define CARD_ECC_DISABLED (1 << 14) 52 #define ERASE_RESET (1 << 13) 53 #define CURRENT_STATE (7 << 9) 54 #define READY_FOR_DATA (1 << 8) 55 #define APP_CMD (1 << 5) 56 #define AKE_SEQ_ERROR (1 << 3) 57 58 enum SDPhySpecificationVersion { 59 SD_PHY_SPECv1_10_VERS = 1, 60 SD_PHY_SPECv2_00_VERS = 2, 61 SD_PHY_SPECv3_01_VERS = 3, 62 }; 63 64 typedef enum { 65 SD_VOLTAGE_0_4V = 400, /* currently not supported */ 66 SD_VOLTAGE_1_8V = 1800, 67 SD_VOLTAGE_3_0V = 3000, 68 SD_VOLTAGE_3_3V = 3300, 69 } sd_voltage_mv_t; 70 71 typedef enum { 72 UHS_NOT_SUPPORTED = 0, 73 UHS_I = 1, 74 UHS_II = 2, /* currently not supported */ 75 UHS_III = 3, /* currently not supported */ 76 } sd_uhs_mode_t; 77 78 typedef enum { 79 sd_none = -1, 80 sd_bc = 0, /* broadcast -- no response */ 81 sd_bcr, /* broadcast with response */ 82 sd_ac, /* addressed -- no data transfer */ 83 sd_adtc, /* addressed with data transfer */ 84 } sd_cmd_type_t; 85 86 typedef struct { 87 uint8_t cmd; 88 uint32_t arg; 89 uint8_t crc; 90 } SDRequest; 91 92 typedef struct SDState SDState; 93 typedef struct SDBus SDBus; 94 95 #define TYPE_SD_CARD "sd-card" 96 typedef struct SDCardClass SDCardClass; 97 DECLARE_OBJ_CHECKERS(SDState, SDCardClass, 98 SD_CARD, TYPE_SD_CARD) 99 100 struct SDCardClass { 101 /*< private >*/ 102 DeviceClass parent_class; 103 /*< public >*/ 104 105 int (*do_command)(SDState *sd, SDRequest *req, uint8_t *response); 106 /** 107 * Write a byte to a SD card. 108 * @sd: card 109 * @value: byte to write 110 * 111 * Write a byte on the data lines of a SD card. 112 */ 113 void (*write_byte)(SDState *sd, uint8_t value); 114 /** 115 * Read a byte from a SD card. 116 * @sd: card 117 * 118 * Read a byte from the data lines of a SD card. 119 * 120 * Return: byte value read 121 */ 122 uint8_t (*read_byte)(SDState *sd); 123 bool (*data_ready)(SDState *sd); 124 void (*set_voltage)(SDState *sd, uint16_t millivolts); 125 uint8_t (*get_dat_lines)(SDState *sd); 126 bool (*get_cmd_line)(SDState *sd); 127 void (*enable)(SDState *sd, bool enable); 128 bool (*get_inserted)(SDState *sd); 129 bool (*get_readonly)(SDState *sd); 130 }; 131 132 #define TYPE_SD_BUS "sd-bus" 133 typedef struct SDBusClass SDBusClass; 134 DECLARE_OBJ_CHECKERS(SDBus, SDBusClass, 135 SD_BUS, TYPE_SD_BUS) 136 137 struct SDBus { 138 BusState qbus; 139 }; 140 141 struct SDBusClass { 142 /*< private >*/ 143 BusClass parent_class; 144 /*< public >*/ 145 146 /* These methods are called by the SD device to notify the controller 147 * when the card insertion or readonly status changes 148 */ 149 void (*set_inserted)(DeviceState *dev, bool inserted); 150 void (*set_readonly)(DeviceState *dev, bool readonly); 151 }; 152 153 /* Functions to be used by qdevified callers (working via 154 * an SDBus rather than directly with SDState) 155 */ 156 void sdbus_set_voltage(SDBus *sdbus, uint16_t millivolts); 157 uint8_t sdbus_get_dat_lines(SDBus *sdbus); 158 bool sdbus_get_cmd_line(SDBus *sdbus); 159 int sdbus_do_command(SDBus *sd, SDRequest *req, uint8_t *response); 160 /** 161 * Write a byte to a SD bus. 162 * @sd: bus 163 * @value: byte to write 164 * 165 * Write a byte on the data lines of a SD bus. 166 */ 167 void sdbus_write_byte(SDBus *sd, uint8_t value); 168 /** 169 * Read a byte from a SD bus. 170 * @sd: bus 171 * 172 * Read a byte from the data lines of a SD bus. 173 * 174 * Return: byte value read 175 */ 176 uint8_t sdbus_read_byte(SDBus *sd); 177 /** 178 * Write data to a SD bus. 179 * @sdbus: bus 180 * @buf: data to write 181 * @length: number of bytes to write 182 * 183 * Write multiple bytes of data on the data lines of a SD bus. 184 */ 185 void sdbus_write_data(SDBus *sdbus, const void *buf, size_t length); 186 /** 187 * Read data from a SD bus. 188 * @sdbus: bus 189 * @buf: buffer to read data into 190 * @length: number of bytes to read 191 * 192 * Read multiple bytes of data on the data lines of a SD bus. 193 */ 194 void sdbus_read_data(SDBus *sdbus, void *buf, size_t length); 195 bool sdbus_data_ready(SDBus *sd); 196 bool sdbus_get_inserted(SDBus *sd); 197 bool sdbus_get_readonly(SDBus *sd); 198 /** 199 * sdbus_reparent_card: Reparent an SD card from one controller to another 200 * @from: controller bus to remove card from 201 * @to: controller bus to move card to 202 * 203 * Reparent an SD card, effectively unplugging it from one controller 204 * and inserting it into another. This is useful for SoCs like the 205 * bcm2835 which have two SD controllers and connect a single SD card 206 * to them, selected by the guest reprogramming GPIO line routing. 207 */ 208 void sdbus_reparent_card(SDBus *from, SDBus *to); 209 210 /* Functions to be used by SD devices to report back to qdevified controllers */ 211 void sdbus_set_inserted(SDBus *sd, bool inserted); 212 void sdbus_set_readonly(SDBus *sd, bool inserted); 213 214 #endif /* HW_SD_H */ 215