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/*
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* SD Memory Card emulation as defined in the "SD Memory Card Physical
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* layer specification, Version 1.10."
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*
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* Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
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* Copyright (c) 2007 CodeSourcery
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "hw/hw.h" |
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#include "block/block.h" |
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#include "hw/sd.h" |
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#include "qemu/bitmap.h" |
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//#define DEBUG_SD 1
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#ifdef DEBUG_SD
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, "SD: " fmt , ## __VA_ARGS__); } while (0) |
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#else
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#define DPRINTF(fmt, ...) do {} while(0) |
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#endif
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typedef enum { |
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sd_r0 = 0, /* no response */ |
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sd_r1, /* normal response command */
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sd_r2_i, /* CID register */
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sd_r2_s, /* CSD register */
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sd_r3, /* OCR register */
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sd_r6 = 6, /* Published RCA response */ |
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sd_r7, /* Operating voltage */
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sd_r1b = -1,
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sd_illegal = -2,
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} sd_rsp_type_t; |
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enum SDCardModes {
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sd_inactive, |
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sd_card_identification_mode, |
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sd_data_transfer_mode, |
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}; |
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enum SDCardStates {
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sd_inactive_state = -1,
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sd_idle_state = 0,
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sd_ready_state, |
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sd_identification_state, |
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sd_standby_state, |
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sd_transfer_state, |
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sd_sendingdata_state, |
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sd_receivingdata_state, |
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sd_programming_state, |
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sd_disconnect_state, |
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}; |
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struct SDState {
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uint32_t mode; /* current card mode, one of SDCardModes */
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int32_t state; /* current card state, one of SDCardStates */
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uint32_t ocr; |
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uint8_t scr[8];
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uint8_t cid[16];
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uint8_t csd[16];
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uint16_t rca; |
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uint32_t card_status; |
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uint8_t sd_status[64];
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uint32_t vhs; |
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bool wp_switch;
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unsigned long *wp_groups; |
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int32_t wpgrps_size; |
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uint64_t size; |
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uint32_t blk_len; |
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uint32_t erase_start; |
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uint32_t erase_end; |
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uint8_t pwd[16];
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uint32_t pwd_len; |
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uint8_t function_group[6];
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bool spi;
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uint8_t current_cmd; |
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/* True if we will handle the next command as an ACMD. Note that this does
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* *not* track the APP_CMD status bit!
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*/
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bool expecting_acmd;
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uint32_t blk_written; |
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uint64_t data_start; |
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uint32_t data_offset; |
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uint8_t data[512];
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qemu_irq readonly_cb; |
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qemu_irq inserted_cb; |
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BlockDriverState *bdrv; |
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uint8_t *buf; |
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bool enable;
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}; |
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static void sd_set_mode(SDState *sd) |
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{ |
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switch (sd->state) {
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case sd_inactive_state:
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sd->mode = sd_inactive; |
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break;
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case sd_idle_state:
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case sd_ready_state:
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case sd_identification_state:
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sd->mode = sd_card_identification_mode; |
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break;
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case sd_standby_state:
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case sd_transfer_state:
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case sd_sendingdata_state:
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case sd_receivingdata_state:
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case sd_programming_state:
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case sd_disconnect_state:
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sd->mode = sd_data_transfer_mode; |
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break;
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} |
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} |
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static const sd_cmd_type_t sd_cmd_type[64] = { |
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sd_bc, sd_none, sd_bcr, sd_bcr, sd_none, sd_none, sd_none, sd_ac, |
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sd_bcr, sd_ac, sd_ac, sd_adtc, sd_ac, sd_ac, sd_none, sd_ac, |
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sd_ac, sd_adtc, sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none, |
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sd_adtc, sd_adtc, sd_adtc, sd_adtc, sd_ac, sd_ac, sd_adtc, sd_none, |
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sd_ac, sd_ac, sd_none, sd_none, sd_none, sd_none, sd_ac, sd_none, |
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sd_none, sd_none, sd_bc, sd_none, sd_none, sd_none, sd_none, sd_none, |
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sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac, |
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sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, |
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}; |
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static const sd_cmd_type_t sd_acmd_type[64] = { |
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sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac, sd_none, |
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sd_none, sd_none, sd_none, sd_none, sd_none, sd_adtc, sd_none, sd_none, |
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sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_adtc, sd_ac, |
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sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, |
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sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, |
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sd_none, sd_bcr, sd_ac, sd_none, sd_none, sd_none, sd_none, sd_none, |
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sd_none, sd_none, sd_none, sd_adtc, sd_none, sd_none, sd_none, sd_none, |
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sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, |
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}; |
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static const int sd_cmd_class[64] = { |
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0, 0, 0, 0, 0, 9, 10, 0, 0, 0, 0, 1, 0, 0, 0, 0, |
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2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 6, 6, 6, 6, |
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5, 5, 10, 10, 10, 10, 5, 9, 9, 9, 7, 7, 7, 7, 7, 7, |
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7, 7, 10, 7, 9, 9, 9, 8, 8, 10, 8, 8, 8, 8, 8, 8, |
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}; |
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static uint8_t sd_crc7(void *message, size_t width) |
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{ |
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int i, bit;
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uint8_t shift_reg = 0x00;
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uint8_t *msg = (uint8_t *) message; |
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for (i = 0; i < width; i ++, msg ++) |
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for (bit = 7; bit >= 0; bit --) { |
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shift_reg <<= 1;
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if ((shift_reg >> 7) ^ ((*msg >> bit) & 1)) |
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shift_reg ^= 0x89;
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} |
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return shift_reg;
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} |
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static uint16_t sd_crc16(void *message, size_t width) |
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{ |
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int i, bit;
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uint16_t shift_reg = 0x0000;
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uint16_t *msg = (uint16_t *) message; |
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width <<= 1;
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for (i = 0; i < width; i ++, msg ++) |
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for (bit = 15; bit >= 0; bit --) { |
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shift_reg <<= 1;
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if ((shift_reg >> 15) ^ ((*msg >> bit) & 1)) |
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shift_reg ^= 0x1011;
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} |
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return shift_reg;
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} |
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static void sd_set_ocr(SDState *sd) |
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{ |
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/* All voltages OK, card power-up OK, Standard Capacity SD Memory Card */
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sd->ocr = 0x80ffff00;
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} |
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static void sd_set_scr(SDState *sd) |
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{ |
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sd->scr[0] = 0x00; /* SCR Structure */ |
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sd->scr[1] = 0x2f; /* SD Security Support */ |
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sd->scr[2] = 0x00; |
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sd->scr[3] = 0x00; |
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sd->scr[4] = 0x00; |
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sd->scr[5] = 0x00; |
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sd->scr[6] = 0x00; |
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sd->scr[7] = 0x00; |
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} |
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#define MID 0xaa |
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#define OID "XY" |
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#define PNM "QEMU!" |
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#define PRV 0x01 |
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#define MDT_YR 2006 |
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#define MDT_MON 2 |
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static void sd_set_cid(SDState *sd) |
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{ |
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sd->cid[0] = MID; /* Fake card manufacturer ID (MID) */ |
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sd->cid[1] = OID[0]; /* OEM/Application ID (OID) */ |
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sd->cid[2] = OID[1]; |
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sd->cid[3] = PNM[0]; /* Fake product name (PNM) */ |
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sd->cid[4] = PNM[1]; |
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sd->cid[5] = PNM[2]; |
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sd->cid[6] = PNM[3]; |
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sd->cid[7] = PNM[4]; |
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sd->cid[8] = PRV; /* Fake product revision (PRV) */ |
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sd->cid[9] = 0xde; /* Fake serial number (PSN) */ |
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sd->cid[10] = 0xad; |
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sd->cid[11] = 0xbe; |
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sd->cid[12] = 0xef; |
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sd->cid[13] = 0x00 | /* Manufacture date (MDT) */ |
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((MDT_YR - 2000) / 10); |
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sd->cid[14] = ((MDT_YR % 10) << 4) | MDT_MON; |
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sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1; |
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} |
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|
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#define HWBLOCK_SHIFT 9 /* 512 bytes */ |
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#define SECTOR_SHIFT 5 /* 16 kilobytes */ |
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#define WPGROUP_SHIFT 7 /* 2 megs */ |
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#define CMULT_SHIFT 9 /* 512 times HWBLOCK_SIZE */ |
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#define WPGROUP_SIZE (1 << (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)) |
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|
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static const uint8_t sd_csd_rw_mask[16] = { |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfe, |
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}; |
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static void sd_set_csd(SDState *sd, uint64_t size) |
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{ |
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uint32_t csize = (size >> (CMULT_SHIFT + HWBLOCK_SHIFT)) - 1;
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uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1; |
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uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1; |
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if (size <= 0x40000000) { /* Standard Capacity SD */ |
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sd->csd[0] = 0x00; /* CSD structure */ |
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sd->csd[1] = 0x26; /* Data read access-time-1 */ |
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sd->csd[2] = 0x00; /* Data read access-time-2 */ |
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sd->csd[3] = 0x5a; /* Max. data transfer rate */ |
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sd->csd[4] = 0x5f; /* Card Command Classes */ |
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sd->csd[5] = 0x50 | /* Max. read data block length */ |
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HWBLOCK_SHIFT; |
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sd->csd[6] = 0xe0 | /* Partial block for read allowed */ |
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((csize >> 10) & 0x03); |
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sd->csd[7] = 0x00 | /* Device size */ |
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((csize >> 2) & 0xff); |
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sd->csd[8] = 0x3f | /* Max. read current */ |
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((csize << 6) & 0xc0); |
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sd->csd[9] = 0xfc | /* Max. write current */ |
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((CMULT_SHIFT - 2) >> 1); |
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sd->csd[10] = 0x40 | /* Erase sector size */ |
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(((CMULT_SHIFT - 2) << 7) & 0x80) | (sectsize >> 1); |
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sd->csd[11] = 0x00 | /* Write protect group size */ |
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((sectsize << 7) & 0x80) | wpsize; |
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sd->csd[12] = 0x90 | /* Write speed factor */ |
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(HWBLOCK_SHIFT >> 2);
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sd->csd[13] = 0x20 | /* Max. write data block length */ |
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((HWBLOCK_SHIFT << 6) & 0xc0); |
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sd->csd[14] = 0x00; /* File format group */ |
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sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1; |
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} else { /* SDHC */ |
293 |
size /= 512 * 1024; |
294 |
size -= 1;
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sd->csd[0] = 0x40; |
296 |
sd->csd[1] = 0x0e; |
297 |
sd->csd[2] = 0x00; |
298 |
sd->csd[3] = 0x32; |
299 |
sd->csd[4] = 0x5b; |
300 |
sd->csd[5] = 0x59; |
301 |
sd->csd[6] = 0x00; |
302 |
sd->csd[7] = (size >> 16) & 0xff; |
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sd->csd[8] = (size >> 8) & 0xff; |
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sd->csd[9] = (size & 0xff); |
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sd->csd[10] = 0x7f; |
306 |
sd->csd[11] = 0x80; |
307 |
sd->csd[12] = 0x0a; |
308 |
sd->csd[13] = 0x40; |
309 |
sd->csd[14] = 0x00; |
310 |
sd->csd[15] = 0x00; |
311 |
sd->ocr |= 1 << 30; /* High Capacity SD Memort Card */ |
312 |
} |
313 |
} |
314 |
|
315 |
static void sd_set_rca(SDState *sd) |
316 |
{ |
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sd->rca += 0x4567;
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} |
319 |
|
320 |
/* Card status bits, split by clear condition:
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* A : According to the card current state
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322 |
* B : Always related to the previous command
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* C : Cleared by read
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*/
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#define CARD_STATUS_A 0x02004100 |
326 |
#define CARD_STATUS_B 0x00c01e00 |
327 |
#define CARD_STATUS_C 0xfd39a028 |
328 |
|
329 |
static void sd_set_cardstatus(SDState *sd) |
330 |
{ |
331 |
sd->card_status = 0x00000100;
|
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} |
333 |
|
334 |
static void sd_set_sdstatus(SDState *sd) |
335 |
{ |
336 |
memset(sd->sd_status, 0, 64); |
337 |
} |
338 |
|
339 |
static int sd_req_crc_validate(SDRequest *req) |
340 |
{ |
341 |
uint8_t buffer[5];
|
342 |
buffer[0] = 0x40 | req->cmd; |
343 |
buffer[1] = (req->arg >> 24) & 0xff; |
344 |
buffer[2] = (req->arg >> 16) & 0xff; |
345 |
buffer[3] = (req->arg >> 8) & 0xff; |
346 |
buffer[4] = (req->arg >> 0) & 0xff; |
347 |
return 0; |
348 |
return sd_crc7(buffer, 5) != req->crc; /* TODO */ |
349 |
} |
350 |
|
351 |
static void sd_response_r1_make(SDState *sd, uint8_t *response) |
352 |
{ |
353 |
uint32_t status = sd->card_status; |
354 |
/* Clear the "clear on read" status bits */
|
355 |
sd->card_status &= ~CARD_STATUS_C; |
356 |
|
357 |
response[0] = (status >> 24) & 0xff; |
358 |
response[1] = (status >> 16) & 0xff; |
359 |
response[2] = (status >> 8) & 0xff; |
360 |
response[3] = (status >> 0) & 0xff; |
361 |
} |
362 |
|
363 |
static void sd_response_r3_make(SDState *sd, uint8_t *response) |
364 |
{ |
365 |
response[0] = (sd->ocr >> 24) & 0xff; |
366 |
response[1] = (sd->ocr >> 16) & 0xff; |
367 |
response[2] = (sd->ocr >> 8) & 0xff; |
368 |
response[3] = (sd->ocr >> 0) & 0xff; |
369 |
} |
370 |
|
371 |
static void sd_response_r6_make(SDState *sd, uint8_t *response) |
372 |
{ |
373 |
uint16_t arg; |
374 |
uint16_t status; |
375 |
|
376 |
arg = sd->rca; |
377 |
status = ((sd->card_status >> 8) & 0xc000) | |
378 |
((sd->card_status >> 6) & 0x2000) | |
379 |
(sd->card_status & 0x1fff);
|
380 |
sd->card_status &= ~(CARD_STATUS_C & 0xc81fff);
|
381 |
|
382 |
response[0] = (arg >> 8) & 0xff; |
383 |
response[1] = arg & 0xff; |
384 |
response[2] = (status >> 8) & 0xff; |
385 |
response[3] = status & 0xff; |
386 |
} |
387 |
|
388 |
static void sd_response_r7_make(SDState *sd, uint8_t *response) |
389 |
{ |
390 |
response[0] = (sd->vhs >> 24) & 0xff; |
391 |
response[1] = (sd->vhs >> 16) & 0xff; |
392 |
response[2] = (sd->vhs >> 8) & 0xff; |
393 |
response[3] = (sd->vhs >> 0) & 0xff; |
394 |
} |
395 |
|
396 |
static inline uint64_t sd_addr_to_wpnum(uint64_t addr) |
397 |
{ |
398 |
return addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
|
399 |
} |
400 |
|
401 |
static void sd_reset(SDState *sd, BlockDriverState *bdrv) |
402 |
{ |
403 |
uint64_t size; |
404 |
uint64_t sect; |
405 |
|
406 |
if (bdrv) {
|
407 |
bdrv_get_geometry(bdrv, §); |
408 |
} else {
|
409 |
sect = 0;
|
410 |
} |
411 |
size = sect << 9;
|
412 |
|
413 |
sect = sd_addr_to_wpnum(size) + 1;
|
414 |
|
415 |
sd->state = sd_idle_state; |
416 |
sd->rca = 0x0000;
|
417 |
sd_set_ocr(sd); |
418 |
sd_set_scr(sd); |
419 |
sd_set_cid(sd); |
420 |
sd_set_csd(sd, size); |
421 |
sd_set_cardstatus(sd); |
422 |
sd_set_sdstatus(sd); |
423 |
|
424 |
sd->bdrv = bdrv; |
425 |
|
426 |
if (sd->wp_groups)
|
427 |
g_free(sd->wp_groups); |
428 |
sd->wp_switch = bdrv ? bdrv_is_read_only(bdrv) : false;
|
429 |
sd->wpgrps_size = sect; |
430 |
sd->wp_groups = bitmap_new(sd->wpgrps_size); |
431 |
memset(sd->function_group, 0, sizeof(sd->function_group)); |
432 |
sd->erase_start = 0;
|
433 |
sd->erase_end = 0;
|
434 |
sd->size = size; |
435 |
sd->blk_len = 0x200;
|
436 |
sd->pwd_len = 0;
|
437 |
sd->expecting_acmd = false;
|
438 |
} |
439 |
|
440 |
static void sd_cardchange(void *opaque, bool load) |
441 |
{ |
442 |
SDState *sd = opaque; |
443 |
|
444 |
qemu_set_irq(sd->inserted_cb, bdrv_is_inserted(sd->bdrv)); |
445 |
if (bdrv_is_inserted(sd->bdrv)) {
|
446 |
sd_reset(sd, sd->bdrv); |
447 |
qemu_set_irq(sd->readonly_cb, sd->wp_switch); |
448 |
} |
449 |
} |
450 |
|
451 |
static const BlockDevOps sd_block_ops = { |
452 |
.change_media_cb = sd_cardchange, |
453 |
}; |
454 |
|
455 |
static const VMStateDescription sd_vmstate = { |
456 |
.name = "sd-card",
|
457 |
.version_id = 1,
|
458 |
.minimum_version_id = 1,
|
459 |
.fields = (VMStateField[]) { |
460 |
VMSTATE_UINT32(mode, SDState), |
461 |
VMSTATE_INT32(state, SDState), |
462 |
VMSTATE_UINT8_ARRAY(cid, SDState, 16),
|
463 |
VMSTATE_UINT8_ARRAY(csd, SDState, 16),
|
464 |
VMSTATE_UINT16(rca, SDState), |
465 |
VMSTATE_UINT32(card_status, SDState), |
466 |
VMSTATE_PARTIAL_BUFFER(sd_status, SDState, 1),
|
467 |
VMSTATE_UINT32(vhs, SDState), |
468 |
VMSTATE_BITMAP(wp_groups, SDState, 0, wpgrps_size),
|
469 |
VMSTATE_UINT32(blk_len, SDState), |
470 |
VMSTATE_UINT32(erase_start, SDState), |
471 |
VMSTATE_UINT32(erase_end, SDState), |
472 |
VMSTATE_UINT8_ARRAY(pwd, SDState, 16),
|
473 |
VMSTATE_UINT32(pwd_len, SDState), |
474 |
VMSTATE_UINT8_ARRAY(function_group, SDState, 6),
|
475 |
VMSTATE_UINT8(current_cmd, SDState), |
476 |
VMSTATE_BOOL(expecting_acmd, SDState), |
477 |
VMSTATE_UINT32(blk_written, SDState), |
478 |
VMSTATE_UINT64(data_start, SDState), |
479 |
VMSTATE_UINT32(data_offset, SDState), |
480 |
VMSTATE_UINT8_ARRAY(data, SDState, 512),
|
481 |
VMSTATE_BUFFER_POINTER_UNSAFE(buf, SDState, 1, 512), |
482 |
VMSTATE_BOOL(enable, SDState), |
483 |
VMSTATE_END_OF_LIST() |
484 |
} |
485 |
}; |
486 |
|
487 |
/* We do not model the chip select pin, so allow the board to select
|
488 |
whether card should be in SSI or MMC/SD mode. It is also up to the
|
489 |
board to ensure that ssi transfers only occur when the chip select
|
490 |
is asserted. */
|
491 |
SDState *sd_init(BlockDriverState *bs, bool is_spi)
|
492 |
{ |
493 |
SDState *sd; |
494 |
|
495 |
sd = (SDState *) g_malloc0(sizeof(SDState));
|
496 |
sd->buf = qemu_blockalign(bs, 512);
|
497 |
sd->spi = is_spi; |
498 |
sd->enable = true;
|
499 |
sd_reset(sd, bs); |
500 |
if (sd->bdrv) {
|
501 |
bdrv_attach_dev_nofail(sd->bdrv, sd); |
502 |
bdrv_set_dev_ops(sd->bdrv, &sd_block_ops, sd); |
503 |
} |
504 |
vmstate_register(NULL, -1, &sd_vmstate, sd); |
505 |
return sd;
|
506 |
} |
507 |
|
508 |
void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
|
509 |
{ |
510 |
sd->readonly_cb = readonly; |
511 |
sd->inserted_cb = insert; |
512 |
qemu_set_irq(readonly, sd->bdrv ? bdrv_is_read_only(sd->bdrv) : 0);
|
513 |
qemu_set_irq(insert, sd->bdrv ? bdrv_is_inserted(sd->bdrv) : 0);
|
514 |
} |
515 |
|
516 |
static void sd_erase(SDState *sd) |
517 |
{ |
518 |
int i;
|
519 |
uint64_t erase_start = sd->erase_start; |
520 |
uint64_t erase_end = sd->erase_end; |
521 |
|
522 |
if (!sd->erase_start || !sd->erase_end) {
|
523 |
sd->card_status |= ERASE_SEQ_ERROR; |
524 |
return;
|
525 |
} |
526 |
|
527 |
if (extract32(sd->ocr, OCR_CCS_BITN, 1)) { |
528 |
/* High capacity memory card: erase units are 512 byte blocks */
|
529 |
erase_start *= 512;
|
530 |
erase_end *= 512;
|
531 |
} |
532 |
|
533 |
erase_start = sd_addr_to_wpnum(erase_start); |
534 |
erase_end = sd_addr_to_wpnum(erase_end); |
535 |
sd->erase_start = 0;
|
536 |
sd->erase_end = 0;
|
537 |
sd->csd[14] |= 0x40; |
538 |
|
539 |
for (i = erase_start; i <= erase_end; i++) {
|
540 |
if (test_bit(i, sd->wp_groups)) {
|
541 |
sd->card_status |= WP_ERASE_SKIP; |
542 |
} |
543 |
} |
544 |
} |
545 |
|
546 |
static uint32_t sd_wpbits(SDState *sd, uint64_t addr)
|
547 |
{ |
548 |
uint32_t i, wpnum; |
549 |
uint32_t ret = 0;
|
550 |
|
551 |
wpnum = sd_addr_to_wpnum(addr); |
552 |
|
553 |
for (i = 0; i < 32; i++, wpnum++, addr += WPGROUP_SIZE) { |
554 |
if (addr < sd->size && test_bit(wpnum, sd->wp_groups)) {
|
555 |
ret |= (1 << i);
|
556 |
} |
557 |
} |
558 |
|
559 |
return ret;
|
560 |
} |
561 |
|
562 |
static void sd_function_switch(SDState *sd, uint32_t arg) |
563 |
{ |
564 |
int i, mode, new_func, crc;
|
565 |
mode = !!(arg & 0x80000000);
|
566 |
|
567 |
sd->data[0] = 0x00; /* Maximum current consumption */ |
568 |
sd->data[1] = 0x01; |
569 |
sd->data[2] = 0x80; /* Supported group 6 functions */ |
570 |
sd->data[3] = 0x01; |
571 |
sd->data[4] = 0x80; /* Supported group 5 functions */ |
572 |
sd->data[5] = 0x01; |
573 |
sd->data[6] = 0x80; /* Supported group 4 functions */ |
574 |
sd->data[7] = 0x01; |
575 |
sd->data[8] = 0x80; /* Supported group 3 functions */ |
576 |
sd->data[9] = 0x01; |
577 |
sd->data[10] = 0x80; /* Supported group 2 functions */ |
578 |
sd->data[11] = 0x43; |
579 |
sd->data[12] = 0x80; /* Supported group 1 functions */ |
580 |
sd->data[13] = 0x03; |
581 |
for (i = 0; i < 6; i ++) { |
582 |
new_func = (arg >> (i * 4)) & 0x0f; |
583 |
if (mode && new_func != 0x0f) |
584 |
sd->function_group[i] = new_func; |
585 |
sd->data[14 + (i >> 1)] = new_func << ((i * 4) & 4); |
586 |
} |
587 |
memset(&sd->data[17], 0, 47); |
588 |
crc = sd_crc16(sd->data, 64);
|
589 |
sd->data[65] = crc >> 8; |
590 |
sd->data[66] = crc & 0xff; |
591 |
} |
592 |
|
593 |
static inline bool sd_wp_addr(SDState *sd, uint64_t addr) |
594 |
{ |
595 |
return test_bit(sd_addr_to_wpnum(addr), sd->wp_groups);
|
596 |
} |
597 |
|
598 |
static void sd_lock_command(SDState *sd) |
599 |
{ |
600 |
int erase, lock, clr_pwd, set_pwd, pwd_len;
|
601 |
erase = !!(sd->data[0] & 0x08); |
602 |
lock = sd->data[0] & 0x04; |
603 |
clr_pwd = sd->data[0] & 0x02; |
604 |
set_pwd = sd->data[0] & 0x01; |
605 |
|
606 |
if (sd->blk_len > 1) |
607 |
pwd_len = sd->data[1];
|
608 |
else
|
609 |
pwd_len = 0;
|
610 |
|
611 |
if (erase) {
|
612 |
if (!(sd->card_status & CARD_IS_LOCKED) || sd->blk_len > 1 || |
613 |
set_pwd || clr_pwd || lock || sd->wp_switch || |
614 |
(sd->csd[14] & 0x20)) { |
615 |
sd->card_status |= LOCK_UNLOCK_FAILED; |
616 |
return;
|
617 |
} |
618 |
bitmap_zero(sd->wp_groups, sd->wpgrps_size); |
619 |
sd->csd[14] &= ~0x10; |
620 |
sd->card_status &= ~CARD_IS_LOCKED; |
621 |
sd->pwd_len = 0;
|
622 |
/* Erasing the entire card here! */
|
623 |
fprintf(stderr, "SD: Card force-erased by CMD42\n");
|
624 |
return;
|
625 |
} |
626 |
|
627 |
if (sd->blk_len < 2 + pwd_len || |
628 |
pwd_len <= sd->pwd_len || |
629 |
pwd_len > sd->pwd_len + 16) {
|
630 |
sd->card_status |= LOCK_UNLOCK_FAILED; |
631 |
return;
|
632 |
} |
633 |
|
634 |
if (sd->pwd_len && memcmp(sd->pwd, sd->data + 2, sd->pwd_len)) { |
635 |
sd->card_status |= LOCK_UNLOCK_FAILED; |
636 |
return;
|
637 |
} |
638 |
|
639 |
pwd_len -= sd->pwd_len; |
640 |
if ((pwd_len && !set_pwd) ||
|
641 |
(clr_pwd && (set_pwd || lock)) || |
642 |
(lock && !sd->pwd_len && !set_pwd) || |
643 |
(!set_pwd && !clr_pwd && |
644 |
(((sd->card_status & CARD_IS_LOCKED) && lock) || |
645 |
(!(sd->card_status & CARD_IS_LOCKED) && !lock)))) { |
646 |
sd->card_status |= LOCK_UNLOCK_FAILED; |
647 |
return;
|
648 |
} |
649 |
|
650 |
if (set_pwd) {
|
651 |
memcpy(sd->pwd, sd->data + 2 + sd->pwd_len, pwd_len);
|
652 |
sd->pwd_len = pwd_len; |
653 |
} |
654 |
|
655 |
if (clr_pwd) {
|
656 |
sd->pwd_len = 0;
|
657 |
} |
658 |
|
659 |
if (lock)
|
660 |
sd->card_status |= CARD_IS_LOCKED; |
661 |
else
|
662 |
sd->card_status &= ~CARD_IS_LOCKED; |
663 |
} |
664 |
|
665 |
static sd_rsp_type_t sd_normal_command(SDState *sd,
|
666 |
SDRequest req) |
667 |
{ |
668 |
uint32_t rca = 0x0000;
|
669 |
uint64_t addr = (sd->ocr & (1 << 30)) ? (uint64_t) req.arg << 9 : req.arg; |
670 |
|
671 |
/* Not interpreting this as an app command */
|
672 |
sd->card_status &= ~APP_CMD; |
673 |
|
674 |
if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc)
|
675 |
rca = req.arg >> 16;
|
676 |
|
677 |
DPRINTF("CMD%d 0x%08x state %d\n", req.cmd, req.arg, sd->state);
|
678 |
switch (req.cmd) {
|
679 |
/* Basic commands (Class 0 and Class 1) */
|
680 |
case 0: /* CMD0: GO_IDLE_STATE */ |
681 |
switch (sd->state) {
|
682 |
case sd_inactive_state:
|
683 |
return sd->spi ? sd_r1 : sd_r0;
|
684 |
|
685 |
default:
|
686 |
sd->state = sd_idle_state; |
687 |
sd_reset(sd, sd->bdrv); |
688 |
return sd->spi ? sd_r1 : sd_r0;
|
689 |
} |
690 |
break;
|
691 |
|
692 |
case 1: /* CMD1: SEND_OP_CMD */ |
693 |
if (!sd->spi)
|
694 |
goto bad_cmd;
|
695 |
|
696 |
sd->state = sd_transfer_state; |
697 |
return sd_r1;
|
698 |
|
699 |
case 2: /* CMD2: ALL_SEND_CID */ |
700 |
if (sd->spi)
|
701 |
goto bad_cmd;
|
702 |
switch (sd->state) {
|
703 |
case sd_ready_state:
|
704 |
sd->state = sd_identification_state; |
705 |
return sd_r2_i;
|
706 |
|
707 |
default:
|
708 |
break;
|
709 |
} |
710 |
break;
|
711 |
|
712 |
case 3: /* CMD3: SEND_RELATIVE_ADDR */ |
713 |
if (sd->spi)
|
714 |
goto bad_cmd;
|
715 |
switch (sd->state) {
|
716 |
case sd_identification_state:
|
717 |
case sd_standby_state:
|
718 |
sd->state = sd_standby_state; |
719 |
sd_set_rca(sd); |
720 |
return sd_r6;
|
721 |
|
722 |
default:
|
723 |
break;
|
724 |
} |
725 |
break;
|
726 |
|
727 |
case 4: /* CMD4: SEND_DSR */ |
728 |
if (sd->spi)
|
729 |
goto bad_cmd;
|
730 |
switch (sd->state) {
|
731 |
case sd_standby_state:
|
732 |
break;
|
733 |
|
734 |
default:
|
735 |
break;
|
736 |
} |
737 |
break;
|
738 |
|
739 |
case 5: /* CMD5: reserved for SDIO cards */ |
740 |
return sd_illegal;
|
741 |
|
742 |
case 6: /* CMD6: SWITCH_FUNCTION */ |
743 |
if (sd->spi)
|
744 |
goto bad_cmd;
|
745 |
switch (sd->mode) {
|
746 |
case sd_data_transfer_mode:
|
747 |
sd_function_switch(sd, req.arg); |
748 |
sd->state = sd_sendingdata_state; |
749 |
sd->data_start = 0;
|
750 |
sd->data_offset = 0;
|
751 |
return sd_r1;
|
752 |
|
753 |
default:
|
754 |
break;
|
755 |
} |
756 |
break;
|
757 |
|
758 |
case 7: /* CMD7: SELECT/DESELECT_CARD */ |
759 |
if (sd->spi)
|
760 |
goto bad_cmd;
|
761 |
switch (sd->state) {
|
762 |
case sd_standby_state:
|
763 |
if (sd->rca != rca)
|
764 |
return sd_r0;
|
765 |
|
766 |
sd->state = sd_transfer_state; |
767 |
return sd_r1b;
|
768 |
|
769 |
case sd_transfer_state:
|
770 |
case sd_sendingdata_state:
|
771 |
if (sd->rca == rca)
|
772 |
break;
|
773 |
|
774 |
sd->state = sd_standby_state; |
775 |
return sd_r1b;
|
776 |
|
777 |
case sd_disconnect_state:
|
778 |
if (sd->rca != rca)
|
779 |
return sd_r0;
|
780 |
|
781 |
sd->state = sd_programming_state; |
782 |
return sd_r1b;
|
783 |
|
784 |
case sd_programming_state:
|
785 |
if (sd->rca == rca)
|
786 |
break;
|
787 |
|
788 |
sd->state = sd_disconnect_state; |
789 |
return sd_r1b;
|
790 |
|
791 |
default:
|
792 |
break;
|
793 |
} |
794 |
break;
|
795 |
|
796 |
case 8: /* CMD8: SEND_IF_COND */ |
797 |
/* Physical Layer Specification Version 2.00 command */
|
798 |
switch (sd->state) {
|
799 |
case sd_idle_state:
|
800 |
sd->vhs = 0;
|
801 |
|
802 |
/* No response if not exactly one VHS bit is set. */
|
803 |
if (!(req.arg >> 8) || (req.arg >> ffs(req.arg & ~0xff))) |
804 |
return sd->spi ? sd_r7 : sd_r0;
|
805 |
|
806 |
/* Accept. */
|
807 |
sd->vhs = req.arg; |
808 |
return sd_r7;
|
809 |
|
810 |
default:
|
811 |
break;
|
812 |
} |
813 |
break;
|
814 |
|
815 |
case 9: /* CMD9: SEND_CSD */ |
816 |
switch (sd->state) {
|
817 |
case sd_standby_state:
|
818 |
if (sd->rca != rca)
|
819 |
return sd_r0;
|
820 |
|
821 |
return sd_r2_s;
|
822 |
|
823 |
case sd_transfer_state:
|
824 |
if (!sd->spi)
|
825 |
break;
|
826 |
sd->state = sd_sendingdata_state; |
827 |
memcpy(sd->data, sd->csd, 16);
|
828 |
sd->data_start = addr; |
829 |
sd->data_offset = 0;
|
830 |
return sd_r1;
|
831 |
|
832 |
default:
|
833 |
break;
|
834 |
} |
835 |
break;
|
836 |
|
837 |
case 10: /* CMD10: SEND_CID */ |
838 |
switch (sd->state) {
|
839 |
case sd_standby_state:
|
840 |
if (sd->rca != rca)
|
841 |
return sd_r0;
|
842 |
|
843 |
return sd_r2_i;
|
844 |
|
845 |
case sd_transfer_state:
|
846 |
if (!sd->spi)
|
847 |
break;
|
848 |
sd->state = sd_sendingdata_state; |
849 |
memcpy(sd->data, sd->cid, 16);
|
850 |
sd->data_start = addr; |
851 |
sd->data_offset = 0;
|
852 |
return sd_r1;
|
853 |
|
854 |
default:
|
855 |
break;
|
856 |
} |
857 |
break;
|
858 |
|
859 |
case 11: /* CMD11: READ_DAT_UNTIL_STOP */ |
860 |
if (sd->spi)
|
861 |
goto bad_cmd;
|
862 |
switch (sd->state) {
|
863 |
case sd_transfer_state:
|
864 |
sd->state = sd_sendingdata_state; |
865 |
sd->data_start = req.arg; |
866 |
sd->data_offset = 0;
|
867 |
|
868 |
if (sd->data_start + sd->blk_len > sd->size)
|
869 |
sd->card_status |= ADDRESS_ERROR; |
870 |
return sd_r0;
|
871 |
|
872 |
default:
|
873 |
break;
|
874 |
} |
875 |
break;
|
876 |
|
877 |
case 12: /* CMD12: STOP_TRANSMISSION */ |
878 |
switch (sd->state) {
|
879 |
case sd_sendingdata_state:
|
880 |
sd->state = sd_transfer_state; |
881 |
return sd_r1b;
|
882 |
|
883 |
case sd_receivingdata_state:
|
884 |
sd->state = sd_programming_state; |
885 |
/* Bzzzzzzztt .... Operation complete. */
|
886 |
sd->state = sd_transfer_state; |
887 |
return sd_r1b;
|
888 |
|
889 |
default:
|
890 |
break;
|
891 |
} |
892 |
break;
|
893 |
|
894 |
case 13: /* CMD13: SEND_STATUS */ |
895 |
switch (sd->mode) {
|
896 |
case sd_data_transfer_mode:
|
897 |
if (sd->rca != rca)
|
898 |
return sd_r0;
|
899 |
|
900 |
return sd_r1;
|
901 |
|
902 |
default:
|
903 |
break;
|
904 |
} |
905 |
break;
|
906 |
|
907 |
case 15: /* CMD15: GO_INACTIVE_STATE */ |
908 |
if (sd->spi)
|
909 |
goto bad_cmd;
|
910 |
switch (sd->mode) {
|
911 |
case sd_data_transfer_mode:
|
912 |
if (sd->rca != rca)
|
913 |
return sd_r0;
|
914 |
|
915 |
sd->state = sd_inactive_state; |
916 |
return sd_r0;
|
917 |
|
918 |
default:
|
919 |
break;
|
920 |
} |
921 |
break;
|
922 |
|
923 |
/* Block read commands (Classs 2) */
|
924 |
case 16: /* CMD16: SET_BLOCKLEN */ |
925 |
switch (sd->state) {
|
926 |
case sd_transfer_state:
|
927 |
if (req.arg > (1 << HWBLOCK_SHIFT)) |
928 |
sd->card_status |= BLOCK_LEN_ERROR; |
929 |
else
|
930 |
sd->blk_len = req.arg; |
931 |
|
932 |
return sd_r1;
|
933 |
|
934 |
default:
|
935 |
break;
|
936 |
} |
937 |
break;
|
938 |
|
939 |
case 17: /* CMD17: READ_SINGLE_BLOCK */ |
940 |
switch (sd->state) {
|
941 |
case sd_transfer_state:
|
942 |
sd->state = sd_sendingdata_state; |
943 |
sd->data_start = addr; |
944 |
sd->data_offset = 0;
|
945 |
|
946 |
if (sd->data_start + sd->blk_len > sd->size)
|
947 |
sd->card_status |= ADDRESS_ERROR; |
948 |
return sd_r1;
|
949 |
|
950 |
default:
|
951 |
break;
|
952 |
} |
953 |
break;
|
954 |
|
955 |
case 18: /* CMD18: READ_MULTIPLE_BLOCK */ |
956 |
switch (sd->state) {
|
957 |
case sd_transfer_state:
|
958 |
sd->state = sd_sendingdata_state; |
959 |
sd->data_start = addr; |
960 |
sd->data_offset = 0;
|
961 |
|
962 |
if (sd->data_start + sd->blk_len > sd->size)
|
963 |
sd->card_status |= ADDRESS_ERROR; |
964 |
return sd_r1;
|
965 |
|
966 |
default:
|
967 |
break;
|
968 |
} |
969 |
break;
|
970 |
|
971 |
/* Block write commands (Class 4) */
|
972 |
case 24: /* CMD24: WRITE_SINGLE_BLOCK */ |
973 |
if (sd->spi)
|
974 |
goto unimplemented_cmd;
|
975 |
switch (sd->state) {
|
976 |
case sd_transfer_state:
|
977 |
/* Writing in SPI mode not implemented. */
|
978 |
if (sd->spi)
|
979 |
break;
|
980 |
sd->state = sd_receivingdata_state; |
981 |
sd->data_start = addr; |
982 |
sd->data_offset = 0;
|
983 |
sd->blk_written = 0;
|
984 |
|
985 |
if (sd->data_start + sd->blk_len > sd->size)
|
986 |
sd->card_status |= ADDRESS_ERROR; |
987 |
if (sd_wp_addr(sd, sd->data_start))
|
988 |
sd->card_status |= WP_VIOLATION; |
989 |
if (sd->csd[14] & 0x30) |
990 |
sd->card_status |= WP_VIOLATION; |
991 |
return sd_r1;
|
992 |
|
993 |
default:
|
994 |
break;
|
995 |
} |
996 |
break;
|
997 |
|
998 |
case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */ |
999 |
if (sd->spi)
|
1000 |
goto unimplemented_cmd;
|
1001 |
switch (sd->state) {
|
1002 |
case sd_transfer_state:
|
1003 |
/* Writing in SPI mode not implemented. */
|
1004 |
if (sd->spi)
|
1005 |
break;
|
1006 |
sd->state = sd_receivingdata_state; |
1007 |
sd->data_start = addr; |
1008 |
sd->data_offset = 0;
|
1009 |
sd->blk_written = 0;
|
1010 |
|
1011 |
if (sd->data_start + sd->blk_len > sd->size)
|
1012 |
sd->card_status |= ADDRESS_ERROR; |
1013 |
if (sd_wp_addr(sd, sd->data_start))
|
1014 |
sd->card_status |= WP_VIOLATION; |
1015 |
if (sd->csd[14] & 0x30) |
1016 |
sd->card_status |= WP_VIOLATION; |
1017 |
return sd_r1;
|
1018 |
|
1019 |
default:
|
1020 |
break;
|
1021 |
} |
1022 |
break;
|
1023 |
|
1024 |
case 26: /* CMD26: PROGRAM_CID */ |
1025 |
if (sd->spi)
|
1026 |
goto bad_cmd;
|
1027 |
switch (sd->state) {
|
1028 |
case sd_transfer_state:
|
1029 |
sd->state = sd_receivingdata_state; |
1030 |
sd->data_start = 0;
|
1031 |
sd->data_offset = 0;
|
1032 |
return sd_r1;
|
1033 |
|
1034 |
default:
|
1035 |
break;
|
1036 |
} |
1037 |
break;
|
1038 |
|
1039 |
case 27: /* CMD27: PROGRAM_CSD */ |
1040 |
if (sd->spi)
|
1041 |
goto unimplemented_cmd;
|
1042 |
switch (sd->state) {
|
1043 |
case sd_transfer_state:
|
1044 |
sd->state = sd_receivingdata_state; |
1045 |
sd->data_start = 0;
|
1046 |
sd->data_offset = 0;
|
1047 |
return sd_r1;
|
1048 |
|
1049 |
default:
|
1050 |
break;
|
1051 |
} |
1052 |
break;
|
1053 |
|
1054 |
/* Write protection (Class 6) */
|
1055 |
case 28: /* CMD28: SET_WRITE_PROT */ |
1056 |
switch (sd->state) {
|
1057 |
case sd_transfer_state:
|
1058 |
if (addr >= sd->size) {
|
1059 |
sd->card_status |= ADDRESS_ERROR; |
1060 |
return sd_r1b;
|
1061 |
} |
1062 |
|
1063 |
sd->state = sd_programming_state; |
1064 |
set_bit(sd_addr_to_wpnum(addr), sd->wp_groups); |
1065 |
/* Bzzzzzzztt .... Operation complete. */
|
1066 |
sd->state = sd_transfer_state; |
1067 |
return sd_r1b;
|
1068 |
|
1069 |
default:
|
1070 |
break;
|
1071 |
} |
1072 |
break;
|
1073 |
|
1074 |
case 29: /* CMD29: CLR_WRITE_PROT */ |
1075 |
switch (sd->state) {
|
1076 |
case sd_transfer_state:
|
1077 |
if (addr >= sd->size) {
|
1078 |
sd->card_status |= ADDRESS_ERROR; |
1079 |
return sd_r1b;
|
1080 |
} |
1081 |
|
1082 |
sd->state = sd_programming_state; |
1083 |
clear_bit(sd_addr_to_wpnum(addr), sd->wp_groups); |
1084 |
/* Bzzzzzzztt .... Operation complete. */
|
1085 |
sd->state = sd_transfer_state; |
1086 |
return sd_r1b;
|
1087 |
|
1088 |
default:
|
1089 |
break;
|
1090 |
} |
1091 |
break;
|
1092 |
|
1093 |
case 30: /* CMD30: SEND_WRITE_PROT */ |
1094 |
switch (sd->state) {
|
1095 |
case sd_transfer_state:
|
1096 |
sd->state = sd_sendingdata_state; |
1097 |
*(uint32_t *) sd->data = sd_wpbits(sd, req.arg); |
1098 |
sd->data_start = addr; |
1099 |
sd->data_offset = 0;
|
1100 |
return sd_r1b;
|
1101 |
|
1102 |
default:
|
1103 |
break;
|
1104 |
} |
1105 |
break;
|
1106 |
|
1107 |
/* Erase commands (Class 5) */
|
1108 |
case 32: /* CMD32: ERASE_WR_BLK_START */ |
1109 |
switch (sd->state) {
|
1110 |
case sd_transfer_state:
|
1111 |
sd->erase_start = req.arg; |
1112 |
return sd_r1;
|
1113 |
|
1114 |
default:
|
1115 |
break;
|
1116 |
} |
1117 |
break;
|
1118 |
|
1119 |
case 33: /* CMD33: ERASE_WR_BLK_END */ |
1120 |
switch (sd->state) {
|
1121 |
case sd_transfer_state:
|
1122 |
sd->erase_end = req.arg; |
1123 |
return sd_r1;
|
1124 |
|
1125 |
default:
|
1126 |
break;
|
1127 |
} |
1128 |
break;
|
1129 |
|
1130 |
case 38: /* CMD38: ERASE */ |
1131 |
switch (sd->state) {
|
1132 |
case sd_transfer_state:
|
1133 |
if (sd->csd[14] & 0x30) { |
1134 |
sd->card_status |= WP_VIOLATION; |
1135 |
return sd_r1b;
|
1136 |
} |
1137 |
|
1138 |
sd->state = sd_programming_state; |
1139 |
sd_erase(sd); |
1140 |
/* Bzzzzzzztt .... Operation complete. */
|
1141 |
sd->state = sd_transfer_state; |
1142 |
return sd_r1b;
|
1143 |
|
1144 |
default:
|
1145 |
break;
|
1146 |
} |
1147 |
break;
|
1148 |
|
1149 |
/* Lock card commands (Class 7) */
|
1150 |
case 42: /* CMD42: LOCK_UNLOCK */ |
1151 |
if (sd->spi)
|
1152 |
goto unimplemented_cmd;
|
1153 |
switch (sd->state) {
|
1154 |
case sd_transfer_state:
|
1155 |
sd->state = sd_receivingdata_state; |
1156 |
sd->data_start = 0;
|
1157 |
sd->data_offset = 0;
|
1158 |
return sd_r1;
|
1159 |
|
1160 |
default:
|
1161 |
break;
|
1162 |
} |
1163 |
break;
|
1164 |
|
1165 |
case 52: |
1166 |
case 53: |
1167 |
/* CMD52, CMD53: reserved for SDIO cards
|
1168 |
* (see the SDIO Simplified Specification V2.0)
|
1169 |
* Handle as illegal command but do not complain
|
1170 |
* on stderr, as some OSes may use these in their
|
1171 |
* probing for presence of an SDIO card.
|
1172 |
*/
|
1173 |
return sd_illegal;
|
1174 |
|
1175 |
/* Application specific commands (Class 8) */
|
1176 |
case 55: /* CMD55: APP_CMD */ |
1177 |
if (sd->rca != rca)
|
1178 |
return sd_r0;
|
1179 |
|
1180 |
sd->expecting_acmd = true;
|
1181 |
sd->card_status |= APP_CMD; |
1182 |
return sd_r1;
|
1183 |
|
1184 |
case 56: /* CMD56: GEN_CMD */ |
1185 |
fprintf(stderr, "SD: GEN_CMD 0x%08x\n", req.arg);
|
1186 |
|
1187 |
switch (sd->state) {
|
1188 |
case sd_transfer_state:
|
1189 |
sd->data_offset = 0;
|
1190 |
if (req.arg & 1) |
1191 |
sd->state = sd_sendingdata_state; |
1192 |
else
|
1193 |
sd->state = sd_receivingdata_state; |
1194 |
return sd_r1;
|
1195 |
|
1196 |
default:
|
1197 |
break;
|
1198 |
} |
1199 |
break;
|
1200 |
|
1201 |
default:
|
1202 |
bad_cmd:
|
1203 |
fprintf(stderr, "SD: Unknown CMD%i\n", req.cmd);
|
1204 |
return sd_illegal;
|
1205 |
|
1206 |
unimplemented_cmd:
|
1207 |
/* Commands that are recognised but not yet implemented in SPI mode. */
|
1208 |
fprintf(stderr, "SD: CMD%i not implemented in SPI mode\n", req.cmd);
|
1209 |
return sd_illegal;
|
1210 |
} |
1211 |
|
1212 |
fprintf(stderr, "SD: CMD%i in a wrong state\n", req.cmd);
|
1213 |
return sd_illegal;
|
1214 |
} |
1215 |
|
1216 |
static sd_rsp_type_t sd_app_command(SDState *sd,
|
1217 |
SDRequest req) |
1218 |
{ |
1219 |
DPRINTF("ACMD%d 0x%08x\n", req.cmd, req.arg);
|
1220 |
sd->card_status |= APP_CMD; |
1221 |
switch (req.cmd) {
|
1222 |
case 6: /* ACMD6: SET_BUS_WIDTH */ |
1223 |
switch (sd->state) {
|
1224 |
case sd_transfer_state:
|
1225 |
sd->sd_status[0] &= 0x3f; |
1226 |
sd->sd_status[0] |= (req.arg & 0x03) << 6; |
1227 |
return sd_r1;
|
1228 |
|
1229 |
default:
|
1230 |
break;
|
1231 |
} |
1232 |
break;
|
1233 |
|
1234 |
case 13: /* ACMD13: SD_STATUS */ |
1235 |
switch (sd->state) {
|
1236 |
case sd_transfer_state:
|
1237 |
sd->state = sd_sendingdata_state; |
1238 |
sd->data_start = 0;
|
1239 |
sd->data_offset = 0;
|
1240 |
return sd_r1;
|
1241 |
|
1242 |
default:
|
1243 |
break;
|
1244 |
} |
1245 |
break;
|
1246 |
|
1247 |
case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */ |
1248 |
switch (sd->state) {
|
1249 |
case sd_transfer_state:
|
1250 |
*(uint32_t *) sd->data = sd->blk_written; |
1251 |
|
1252 |
sd->state = sd_sendingdata_state; |
1253 |
sd->data_start = 0;
|
1254 |
sd->data_offset = 0;
|
1255 |
return sd_r1;
|
1256 |
|
1257 |
default:
|
1258 |
break;
|
1259 |
} |
1260 |
break;
|
1261 |
|
1262 |
case 23: /* ACMD23: SET_WR_BLK_ERASE_COUNT */ |
1263 |
switch (sd->state) {
|
1264 |
case sd_transfer_state:
|
1265 |
return sd_r1;
|
1266 |
|
1267 |
default:
|
1268 |
break;
|
1269 |
} |
1270 |
break;
|
1271 |
|
1272 |
case 41: /* ACMD41: SD_APP_OP_COND */ |
1273 |
if (sd->spi) {
|
1274 |
/* SEND_OP_CMD */
|
1275 |
sd->state = sd_transfer_state; |
1276 |
return sd_r1;
|
1277 |
} |
1278 |
switch (sd->state) {
|
1279 |
case sd_idle_state:
|
1280 |
/* We accept any voltage. 10000 V is nothing. */
|
1281 |
if (req.arg)
|
1282 |
sd->state = sd_ready_state; |
1283 |
|
1284 |
return sd_r3;
|
1285 |
|
1286 |
default:
|
1287 |
break;
|
1288 |
} |
1289 |
break;
|
1290 |
|
1291 |
case 42: /* ACMD42: SET_CLR_CARD_DETECT */ |
1292 |
switch (sd->state) {
|
1293 |
case sd_transfer_state:
|
1294 |
/* Bringing in the 50KOhm pull-up resistor... Done. */
|
1295 |
return sd_r1;
|
1296 |
|
1297 |
default:
|
1298 |
break;
|
1299 |
} |
1300 |
break;
|
1301 |
|
1302 |
case 51: /* ACMD51: SEND_SCR */ |
1303 |
switch (sd->state) {
|
1304 |
case sd_transfer_state:
|
1305 |
sd->state = sd_sendingdata_state; |
1306 |
sd->data_start = 0;
|
1307 |
sd->data_offset = 0;
|
1308 |
return sd_r1;
|
1309 |
|
1310 |
default:
|
1311 |
break;
|
1312 |
} |
1313 |
break;
|
1314 |
|
1315 |
default:
|
1316 |
/* Fall back to standard commands. */
|
1317 |
return sd_normal_command(sd, req);
|
1318 |
} |
1319 |
|
1320 |
fprintf(stderr, "SD: ACMD%i in a wrong state\n", req.cmd);
|
1321 |
return sd_illegal;
|
1322 |
} |
1323 |
|
1324 |
static int cmd_valid_while_locked(SDState *sd, SDRequest *req) |
1325 |
{ |
1326 |
/* Valid commands in locked state:
|
1327 |
* basic class (0)
|
1328 |
* lock card class (7)
|
1329 |
* CMD16
|
1330 |
* implicitly, the ACMD prefix CMD55
|
1331 |
* ACMD41 and ACMD42
|
1332 |
* Anything else provokes an "illegal command" response.
|
1333 |
*/
|
1334 |
if (sd->expecting_acmd) {
|
1335 |
return req->cmd == 41 || req->cmd == 42; |
1336 |
} |
1337 |
if (req->cmd == 16 || req->cmd == 55) { |
1338 |
return 1; |
1339 |
} |
1340 |
return sd_cmd_class[req->cmd] == 0 || sd_cmd_class[req->cmd] == 7; |
1341 |
} |
1342 |
|
1343 |
int sd_do_command(SDState *sd, SDRequest *req,
|
1344 |
uint8_t *response) { |
1345 |
int last_state;
|
1346 |
sd_rsp_type_t rtype; |
1347 |
int rsplen;
|
1348 |
|
1349 |
if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable) {
|
1350 |
return 0; |
1351 |
} |
1352 |
|
1353 |
if (sd_req_crc_validate(req)) {
|
1354 |
sd->card_status |= COM_CRC_ERROR; |
1355 |
rtype = sd_illegal; |
1356 |
goto send_response;
|
1357 |
} |
1358 |
|
1359 |
if (sd->card_status & CARD_IS_LOCKED) {
|
1360 |
if (!cmd_valid_while_locked(sd, req)) {
|
1361 |
sd->card_status |= ILLEGAL_COMMAND; |
1362 |
sd->expecting_acmd = false;
|
1363 |
fprintf(stderr, "SD: Card is locked\n");
|
1364 |
rtype = sd_illegal; |
1365 |
goto send_response;
|
1366 |
} |
1367 |
} |
1368 |
|
1369 |
last_state = sd->state; |
1370 |
sd_set_mode(sd); |
1371 |
|
1372 |
if (sd->expecting_acmd) {
|
1373 |
sd->expecting_acmd = false;
|
1374 |
rtype = sd_app_command(sd, *req); |
1375 |
} else {
|
1376 |
rtype = sd_normal_command(sd, *req); |
1377 |
} |
1378 |
|
1379 |
if (rtype == sd_illegal) {
|
1380 |
sd->card_status |= ILLEGAL_COMMAND; |
1381 |
} else {
|
1382 |
/* Valid command, we can update the 'state before command' bits.
|
1383 |
* (Do this now so they appear in r1 responses.)
|
1384 |
*/
|
1385 |
sd->current_cmd = req->cmd; |
1386 |
sd->card_status &= ~CURRENT_STATE; |
1387 |
sd->card_status |= (last_state << 9);
|
1388 |
} |
1389 |
|
1390 |
send_response:
|
1391 |
switch (rtype) {
|
1392 |
case sd_r1:
|
1393 |
case sd_r1b:
|
1394 |
sd_response_r1_make(sd, response); |
1395 |
rsplen = 4;
|
1396 |
break;
|
1397 |
|
1398 |
case sd_r2_i:
|
1399 |
memcpy(response, sd->cid, sizeof(sd->cid));
|
1400 |
rsplen = 16;
|
1401 |
break;
|
1402 |
|
1403 |
case sd_r2_s:
|
1404 |
memcpy(response, sd->csd, sizeof(sd->csd));
|
1405 |
rsplen = 16;
|
1406 |
break;
|
1407 |
|
1408 |
case sd_r3:
|
1409 |
sd_response_r3_make(sd, response); |
1410 |
rsplen = 4;
|
1411 |
break;
|
1412 |
|
1413 |
case sd_r6:
|
1414 |
sd_response_r6_make(sd, response); |
1415 |
rsplen = 4;
|
1416 |
break;
|
1417 |
|
1418 |
case sd_r7:
|
1419 |
sd_response_r7_make(sd, response); |
1420 |
rsplen = 4;
|
1421 |
break;
|
1422 |
|
1423 |
case sd_r0:
|
1424 |
case sd_illegal:
|
1425 |
default:
|
1426 |
rsplen = 0;
|
1427 |
break;
|
1428 |
} |
1429 |
|
1430 |
if (rtype != sd_illegal) {
|
1431 |
/* Clear the "clear on valid command" status bits now we've
|
1432 |
* sent any response
|
1433 |
*/
|
1434 |
sd->card_status &= ~CARD_STATUS_B; |
1435 |
} |
1436 |
|
1437 |
#ifdef DEBUG_SD
|
1438 |
if (rsplen) {
|
1439 |
int i;
|
1440 |
DPRINTF("Response:");
|
1441 |
for (i = 0; i < rsplen; i++) |
1442 |
fprintf(stderr, " %02x", response[i]);
|
1443 |
fprintf(stderr, " state %d\n", sd->state);
|
1444 |
} else {
|
1445 |
DPRINTF("No response %d\n", sd->state);
|
1446 |
} |
1447 |
#endif
|
1448 |
|
1449 |
return rsplen;
|
1450 |
} |
1451 |
|
1452 |
static void sd_blk_read(SDState *sd, uint64_t addr, uint32_t len) |
1453 |
{ |
1454 |
uint64_t end = addr + len; |
1455 |
|
1456 |
DPRINTF("sd_blk_read: addr = 0x%08llx, len = %d\n",
|
1457 |
(unsigned long long) addr, len); |
1458 |
if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) < 0) { |
1459 |
fprintf(stderr, "sd_blk_read: read error on host side\n");
|
1460 |
return;
|
1461 |
} |
1462 |
|
1463 |
if (end > (addr & ~511) + 512) { |
1464 |
memcpy(sd->data, sd->buf + (addr & 511), 512 - (addr & 511)); |
1465 |
|
1466 |
if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) < 0) { |
1467 |
fprintf(stderr, "sd_blk_read: read error on host side\n");
|
1468 |
return;
|
1469 |
} |
1470 |
memcpy(sd->data + 512 - (addr & 511), sd->buf, end & 511); |
1471 |
} else
|
1472 |
memcpy(sd->data, sd->buf + (addr & 511), len);
|
1473 |
} |
1474 |
|
1475 |
static void sd_blk_write(SDState *sd, uint64_t addr, uint32_t len) |
1476 |
{ |
1477 |
uint64_t end = addr + len; |
1478 |
|
1479 |
if ((addr & 511) || len < 512) |
1480 |
if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) < 0) { |
1481 |
fprintf(stderr, "sd_blk_write: read error on host side\n");
|
1482 |
return;
|
1483 |
} |
1484 |
|
1485 |
if (end > (addr & ~511) + 512) { |
1486 |
memcpy(sd->buf + (addr & 511), sd->data, 512 - (addr & 511)); |
1487 |
if (bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) < 0) { |
1488 |
fprintf(stderr, "sd_blk_write: write error on host side\n");
|
1489 |
return;
|
1490 |
} |
1491 |
|
1492 |
if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) < 0) { |
1493 |
fprintf(stderr, "sd_blk_write: read error on host side\n");
|
1494 |
return;
|
1495 |
} |
1496 |
memcpy(sd->buf, sd->data + 512 - (addr & 511), end & 511); |
1497 |
if (bdrv_write(sd->bdrv, end >> 9, sd->buf, 1) < 0) { |
1498 |
fprintf(stderr, "sd_blk_write: write error on host side\n");
|
1499 |
} |
1500 |
} else {
|
1501 |
memcpy(sd->buf + (addr & 511), sd->data, len);
|
1502 |
if (!sd->bdrv || bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) < 0) { |
1503 |
fprintf(stderr, "sd_blk_write: write error on host side\n");
|
1504 |
} |
1505 |
} |
1506 |
} |
1507 |
|
1508 |
#define BLK_READ_BLOCK(a, len) sd_blk_read(sd, a, len)
|
1509 |
#define BLK_WRITE_BLOCK(a, len) sd_blk_write(sd, a, len)
|
1510 |
#define APP_READ_BLOCK(a, len) memset(sd->data, 0xec, len) |
1511 |
#define APP_WRITE_BLOCK(a, len)
|
1512 |
|
1513 |
void sd_write_data(SDState *sd, uint8_t value)
|
1514 |
{ |
1515 |
int i;
|
1516 |
|
1517 |
if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
|
1518 |
return;
|
1519 |
|
1520 |
if (sd->state != sd_receivingdata_state) {
|
1521 |
fprintf(stderr, "sd_write_data: not in Receiving-Data state\n");
|
1522 |
return;
|
1523 |
} |
1524 |
|
1525 |
if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
|
1526 |
return;
|
1527 |
|
1528 |
switch (sd->current_cmd) {
|
1529 |
case 24: /* CMD24: WRITE_SINGLE_BLOCK */ |
1530 |
sd->data[sd->data_offset ++] = value; |
1531 |
if (sd->data_offset >= sd->blk_len) {
|
1532 |
/* TODO: Check CRC before committing */
|
1533 |
sd->state = sd_programming_state; |
1534 |
BLK_WRITE_BLOCK(sd->data_start, sd->data_offset); |
1535 |
sd->blk_written ++; |
1536 |
sd->csd[14] |= 0x40; |
1537 |
/* Bzzzzzzztt .... Operation complete. */
|
1538 |
sd->state = sd_transfer_state; |
1539 |
} |
1540 |
break;
|
1541 |
|
1542 |
case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */ |
1543 |
if (sd->data_offset == 0) { |
1544 |
/* Start of the block - lets check the address is valid */
|
1545 |
if (sd->data_start + sd->blk_len > sd->size) {
|
1546 |
sd->card_status |= ADDRESS_ERROR; |
1547 |
break;
|
1548 |
} |
1549 |
if (sd_wp_addr(sd, sd->data_start)) {
|
1550 |
sd->card_status |= WP_VIOLATION; |
1551 |
break;
|
1552 |
} |
1553 |
} |
1554 |
sd->data[sd->data_offset++] = value; |
1555 |
if (sd->data_offset >= sd->blk_len) {
|
1556 |
/* TODO: Check CRC before committing */
|
1557 |
sd->state = sd_programming_state; |
1558 |
BLK_WRITE_BLOCK(sd->data_start, sd->data_offset); |
1559 |
sd->blk_written++; |
1560 |
sd->data_start += sd->blk_len; |
1561 |
sd->data_offset = 0;
|
1562 |
sd->csd[14] |= 0x40; |
1563 |
|
1564 |
/* Bzzzzzzztt .... Operation complete. */
|
1565 |
sd->state = sd_receivingdata_state; |
1566 |
} |
1567 |
break;
|
1568 |
|
1569 |
case 26: /* CMD26: PROGRAM_CID */ |
1570 |
sd->data[sd->data_offset ++] = value; |
1571 |
if (sd->data_offset >= sizeof(sd->cid)) { |
1572 |
/* TODO: Check CRC before committing */
|
1573 |
sd->state = sd_programming_state; |
1574 |
for (i = 0; i < sizeof(sd->cid); i ++) |
1575 |
if ((sd->cid[i] | 0x00) != sd->data[i]) |
1576 |
sd->card_status |= CID_CSD_OVERWRITE; |
1577 |
|
1578 |
if (!(sd->card_status & CID_CSD_OVERWRITE))
|
1579 |
for (i = 0; i < sizeof(sd->cid); i ++) { |
1580 |
sd->cid[i] |= 0x00;
|
1581 |
sd->cid[i] &= sd->data[i]; |
1582 |
} |
1583 |
/* Bzzzzzzztt .... Operation complete. */
|
1584 |
sd->state = sd_transfer_state; |
1585 |
} |
1586 |
break;
|
1587 |
|
1588 |
case 27: /* CMD27: PROGRAM_CSD */ |
1589 |
sd->data[sd->data_offset ++] = value; |
1590 |
if (sd->data_offset >= sizeof(sd->csd)) { |
1591 |
/* TODO: Check CRC before committing */
|
1592 |
sd->state = sd_programming_state; |
1593 |
for (i = 0; i < sizeof(sd->csd); i ++) |
1594 |
if ((sd->csd[i] | sd_csd_rw_mask[i]) !=
|
1595 |
(sd->data[i] | sd_csd_rw_mask[i])) |
1596 |
sd->card_status |= CID_CSD_OVERWRITE; |
1597 |
|
1598 |
/* Copy flag (OTP) & Permanent write protect */
|
1599 |
if (sd->csd[14] & ~sd->data[14] & 0x60) |
1600 |
sd->card_status |= CID_CSD_OVERWRITE; |
1601 |
|
1602 |
if (!(sd->card_status & CID_CSD_OVERWRITE))
|
1603 |
for (i = 0; i < sizeof(sd->csd); i ++) { |
1604 |
sd->csd[i] |= sd_csd_rw_mask[i]; |
1605 |
sd->csd[i] &= sd->data[i]; |
1606 |
} |
1607 |
/* Bzzzzzzztt .... Operation complete. */
|
1608 |
sd->state = sd_transfer_state; |
1609 |
} |
1610 |
break;
|
1611 |
|
1612 |
case 42: /* CMD42: LOCK_UNLOCK */ |
1613 |
sd->data[sd->data_offset ++] = value; |
1614 |
if (sd->data_offset >= sd->blk_len) {
|
1615 |
/* TODO: Check CRC before committing */
|
1616 |
sd->state = sd_programming_state; |
1617 |
sd_lock_command(sd); |
1618 |
/* Bzzzzzzztt .... Operation complete. */
|
1619 |
sd->state = sd_transfer_state; |
1620 |
} |
1621 |
break;
|
1622 |
|
1623 |
case 56: /* CMD56: GEN_CMD */ |
1624 |
sd->data[sd->data_offset ++] = value; |
1625 |
if (sd->data_offset >= sd->blk_len) {
|
1626 |
APP_WRITE_BLOCK(sd->data_start, sd->data_offset); |
1627 |
sd->state = sd_transfer_state; |
1628 |
} |
1629 |
break;
|
1630 |
|
1631 |
default:
|
1632 |
fprintf(stderr, "sd_write_data: unknown command\n");
|
1633 |
break;
|
1634 |
} |
1635 |
} |
1636 |
|
1637 |
uint8_t sd_read_data(SDState *sd) |
1638 |
{ |
1639 |
/* TODO: Append CRCs */
|
1640 |
uint8_t ret; |
1641 |
int io_len;
|
1642 |
|
1643 |
if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
|
1644 |
return 0x00; |
1645 |
|
1646 |
if (sd->state != sd_sendingdata_state) {
|
1647 |
fprintf(stderr, "sd_read_data: not in Sending-Data state\n");
|
1648 |
return 0x00; |
1649 |
} |
1650 |
|
1651 |
if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
|
1652 |
return 0x00; |
1653 |
|
1654 |
io_len = (sd->ocr & (1 << 30)) ? 512 : sd->blk_len; |
1655 |
|
1656 |
switch (sd->current_cmd) {
|
1657 |
case 6: /* CMD6: SWITCH_FUNCTION */ |
1658 |
ret = sd->data[sd->data_offset ++]; |
1659 |
|
1660 |
if (sd->data_offset >= 64) |
1661 |
sd->state = sd_transfer_state; |
1662 |
break;
|
1663 |
|
1664 |
case 9: /* CMD9: SEND_CSD */ |
1665 |
case 10: /* CMD10: SEND_CID */ |
1666 |
ret = sd->data[sd->data_offset ++]; |
1667 |
|
1668 |
if (sd->data_offset >= 16) |
1669 |
sd->state = sd_transfer_state; |
1670 |
break;
|
1671 |
|
1672 |
case 11: /* CMD11: READ_DAT_UNTIL_STOP */ |
1673 |
if (sd->data_offset == 0) |
1674 |
BLK_READ_BLOCK(sd->data_start, io_len); |
1675 |
ret = sd->data[sd->data_offset ++]; |
1676 |
|
1677 |
if (sd->data_offset >= io_len) {
|
1678 |
sd->data_start += io_len; |
1679 |
sd->data_offset = 0;
|
1680 |
if (sd->data_start + io_len > sd->size) {
|
1681 |
sd->card_status |= ADDRESS_ERROR; |
1682 |
break;
|
1683 |
} |
1684 |
} |
1685 |
break;
|
1686 |
|
1687 |
case 13: /* ACMD13: SD_STATUS */ |
1688 |
ret = sd->sd_status[sd->data_offset ++]; |
1689 |
|
1690 |
if (sd->data_offset >= sizeof(sd->sd_status)) |
1691 |
sd->state = sd_transfer_state; |
1692 |
break;
|
1693 |
|
1694 |
case 17: /* CMD17: READ_SINGLE_BLOCK */ |
1695 |
if (sd->data_offset == 0) |
1696 |
BLK_READ_BLOCK(sd->data_start, io_len); |
1697 |
ret = sd->data[sd->data_offset ++]; |
1698 |
|
1699 |
if (sd->data_offset >= io_len)
|
1700 |
sd->state = sd_transfer_state; |
1701 |
break;
|
1702 |
|
1703 |
case 18: /* CMD18: READ_MULTIPLE_BLOCK */ |
1704 |
if (sd->data_offset == 0) |
1705 |
BLK_READ_BLOCK(sd->data_start, io_len); |
1706 |
ret = sd->data[sd->data_offset ++]; |
1707 |
|
1708 |
if (sd->data_offset >= io_len) {
|
1709 |
sd->data_start += io_len; |
1710 |
sd->data_offset = 0;
|
1711 |
if (sd->data_start + io_len > sd->size) {
|
1712 |
sd->card_status |= ADDRESS_ERROR; |
1713 |
break;
|
1714 |
} |
1715 |
} |
1716 |
break;
|
1717 |
|
1718 |
case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */ |
1719 |
ret = sd->data[sd->data_offset ++]; |
1720 |
|
1721 |
if (sd->data_offset >= 4) |
1722 |
sd->state = sd_transfer_state; |
1723 |
break;
|
1724 |
|
1725 |
case 30: /* CMD30: SEND_WRITE_PROT */ |
1726 |
ret = sd->data[sd->data_offset ++]; |
1727 |
|
1728 |
if (sd->data_offset >= 4) |
1729 |
sd->state = sd_transfer_state; |
1730 |
break;
|
1731 |
|
1732 |
case 51: /* ACMD51: SEND_SCR */ |
1733 |
ret = sd->scr[sd->data_offset ++]; |
1734 |
|
1735 |
if (sd->data_offset >= sizeof(sd->scr)) |
1736 |
sd->state = sd_transfer_state; |
1737 |
break;
|
1738 |
|
1739 |
case 56: /* CMD56: GEN_CMD */ |
1740 |
if (sd->data_offset == 0) |
1741 |
APP_READ_BLOCK(sd->data_start, sd->blk_len); |
1742 |
ret = sd->data[sd->data_offset ++]; |
1743 |
|
1744 |
if (sd->data_offset >= sd->blk_len)
|
1745 |
sd->state = sd_transfer_state; |
1746 |
break;
|
1747 |
|
1748 |
default:
|
1749 |
fprintf(stderr, "sd_read_data: unknown command\n");
|
1750 |
return 0x00; |
1751 |
} |
1752 |
|
1753 |
return ret;
|
1754 |
} |
1755 |
|
1756 |
bool sd_data_ready(SDState *sd)
|
1757 |
{ |
1758 |
return sd->state == sd_sendingdata_state;
|
1759 |
} |
1760 |
|
1761 |
void sd_enable(SDState *sd, bool enable) |
1762 |
{ |
1763 |
sd->enable = enable; |
1764 |
} |