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 94 #define TYPE_SD_CARD "sd-card" 95 typedef struct SDCardClass SDCardClass; 96 DECLARE_OBJ_CHECKERS(SDState, SDCardClass, 97 SD_CARD, TYPE_SD_CARD) 98 99 struct SDCardClass { 100 /*< private >*/ 101 DeviceClass parent_class; 102 /*< public >*/ 103 104 int (*do_command)(SDState *sd, SDRequest *req, uint8_t *response); 105 /** 106 * Write a byte to a SD card. 107 * @sd: card 108 * @value: byte to write 109 * 110 * Write a byte on the data lines of a SD card. 111 */ 112 void (*write_byte)(SDState *sd, uint8_t value); 113 /** 114 * Read a byte from a SD card. 115 * @sd: card 116 * 117 * Read a byte from the data lines of a SD card. 118 * 119 * Return: byte value read 120 */ 121 uint8_t (*read_byte)(SDState *sd); 122 bool (*data_ready)(SDState *sd); 123 void (*set_voltage)(SDState *sd, uint16_t millivolts); 124 uint8_t (*get_dat_lines)(SDState *sd); 125 bool (*get_cmd_line)(SDState *sd); 126 void (*enable)(SDState *sd, bool enable); 127 bool (*get_inserted)(SDState *sd); 128 bool (*get_readonly)(SDState *sd); 129 }; 130 131 #define TYPE_SD_BUS "sd-bus" 132 OBJECT_DECLARE_TYPE(SDBus, SDBusClass, 133 sd_bus, SD_BUS) 134 135 struct SDBus { 136 BusState qbus; 137 }; 138 139 struct SDBusClass { 140 /*< private >*/ 141 BusClass parent_class; 142 /*< public >*/ 143 144 /* These methods are called by the SD device to notify the controller 145 * when the card insertion or readonly status changes 146 */ 147 void (*set_inserted)(DeviceState *dev, bool inserted); 148 void (*set_readonly)(DeviceState *dev, bool readonly); 149 }; 150 151 /* Functions to be used by qdevified callers (working via 152 * an SDBus rather than directly with SDState) 153 */ 154 void sdbus_set_voltage(SDBus *sdbus, uint16_t millivolts); 155 uint8_t sdbus_get_dat_lines(SDBus *sdbus); 156 bool sdbus_get_cmd_line(SDBus *sdbus); 157 int sdbus_do_command(SDBus *sd, SDRequest *req, uint8_t *response); 158 /** 159 * Write a byte to a SD bus. 160 * @sd: bus 161 * @value: byte to write 162 * 163 * Write a byte on the data lines of a SD bus. 164 */ 165 void sdbus_write_byte(SDBus *sd, uint8_t value); 166 /** 167 * Read a byte from a SD bus. 168 * @sd: bus 169 * 170 * Read a byte from the data lines of a SD bus. 171 * 172 * Return: byte value read 173 */ 174 uint8_t sdbus_read_byte(SDBus *sd); 175 /** 176 * Write data to a SD bus. 177 * @sdbus: bus 178 * @buf: data to write 179 * @length: number of bytes to write 180 * 181 * Write multiple bytes of data on the data lines of a SD bus. 182 */ 183 void sdbus_write_data(SDBus *sdbus, const void *buf, size_t length); 184 /** 185 * Read data from a SD bus. 186 * @sdbus: bus 187 * @buf: buffer to read data into 188 * @length: number of bytes to read 189 * 190 * Read multiple bytes of data on the data lines of a SD bus. 191 */ 192 void sdbus_read_data(SDBus *sdbus, void *buf, size_t length); 193 bool sdbus_data_ready(SDBus *sd); 194 bool sdbus_get_inserted(SDBus *sd); 195 bool sdbus_get_readonly(SDBus *sd); 196 /** 197 * sdbus_reparent_card: Reparent an SD card from one controller to another 198 * @from: controller bus to remove card from 199 * @to: controller bus to move card to 200 * 201 * Reparent an SD card, effectively unplugging it from one controller 202 * and inserting it into another. This is useful for SoCs like the 203 * bcm2835 which have two SD controllers and connect a single SD card 204 * to them, selected by the guest reprogramming GPIO line routing. 205 */ 206 void sdbus_reparent_card(SDBus *from, SDBus *to); 207 208 /* Functions to be used by SD devices to report back to qdevified controllers */ 209 void sdbus_set_inserted(SDBus *sd, bool inserted); 210 void sdbus_set_readonly(SDBus *sd, bool inserted); 211 212 #endif /* HW_SD_H */ 213