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Diffstat (limited to 'fw/fe310/eos/dev/sdcard.c')
-rw-r--r--fw/fe310/eos/dev/sdcard.c539
1 files changed, 539 insertions, 0 deletions
diff --git a/fw/fe310/eos/dev/sdcard.c b/fw/fe310/eos/dev/sdcard.c
new file mode 100644
index 0000000..d081388
--- /dev/null
+++ b/fw/fe310/eos/dev/sdcard.c
@@ -0,0 +1,539 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "eos.h"
+#include "timer.h"
+
+#include "spi.h"
+#include "spi_dev.h"
+
+#include "sdc_crypto.h"
+#include "sdcard.h"
+
+#define SDC_TIMEOUT_CMD 500
+#define SDC_TIMEOUT_READ 200
+#define SDC_TIMEOUT_WRITE 500
+
+#define SDC_POLY_CRC7 0x09
+#define SDC_POLY_CRC16 0x1021
+
+#define SDC_CMD_FLAG_CRC 0x01
+#define SDC_CMD_FLAG_NOCS 0x02
+#define SDC_CMD_FLAG_NOWAIT 0x04
+#define SDC_CMD_FLAG_RSTUFF 0x08
+
+#define SDC_TOKEN_START_BLK 0xfe
+#define SDC_TOKEN_START_BLKM 0xfc
+#define SDC_TOKEN_STOP_TRAN 0xfd
+
+#define SDC_DRESP_MASK 0x1f
+#define SDC_DRESP_ACCEPT 0x05
+#define SDC_DRESP_ERR_CRC 0x0b
+#define SDC_DRESP_ERR_WRITE 0x0d
+
+#define SDC_R1_READY 0x00
+
+#define SDC_R1_IDLE_STATE 0x01
+#define SDC_R1_ERASE_RESET 0x02
+#define SDC_R1_ILLEGAL_CMD 0x04
+#define SDC_R1_ERR_CMD_CRC 0x08
+#define SDC_R1_ERR_ERASE_SEQ 0x10
+#define SDC_R1_ERR_ADDR 0x20
+#define SDC_R1_ERR_PARAM 0x40
+
+#define SDC_NCR 10
+
+#define SDC_ERR(rv) ((rv < 0) ? rv : EOS_ERR)
+
+/* CMD */
+#define GO_IDLE_STATE 0
+#define SEND_OP_COND 1
+#define SEND_IF_COND 8
+#define SEND_CSD 9
+#define STOP_TRANSMISSION 12
+#define SET_BLOCKLEN 16
+#define READ_SINGLE_BLOCK 17
+#define READ_MULTIPLE_BLOCK 18
+#define WRITE_BLOCK 24
+#define WRITE_MULTIPLE_BLOCK 25
+#define ERASE_WR_BLK_START 32
+#define ERASE_WR_BLK_END 33
+#define ERASE 38
+#define APP_CMD 55
+#define READ_OCR 58
+
+/* ACMD */
+#define SD_STATUS 13
+#define SET_WR_BLK_ERASE_COUNT 23
+#define SD_APP_OP_COND 41
+
+static uint8_t sdc_type = 0;
+
+static uint8_t sdc_crc7(uint8_t crc, uint8_t b) {
+ int i;
+
+ for (i=8; i--; b<<=1) {
+ crc <<= 1;
+ if ((b ^ crc) & 0x80) crc ^= SDC_POLY_CRC7;
+ }
+ return crc & 0x7f;
+}
+
+static uint16_t sdc_crc16(uint16_t crc, uint8_t b) {
+ int i;
+
+ crc = crc ^ ((uint16_t)b << 8);
+ for (i=8; i--;) {
+ if (crc & 0x8000) {
+ crc = (crc << 1) ^ SDC_POLY_CRC16;
+ } else {
+ crc <<= 1;
+ }
+ }
+ return crc;
+}
+
+static uint32_t sdc_nto(uint32_t start, uint32_t timeout) {
+ uint32_t d = eos_time_delta_ms(start);
+ return (d > timeout) ? 0 : timeout - d;
+}
+
+static uint8_t sdc_xchg8(uint8_t data) {
+ return eos_spi_xchg8(data, 0);
+}
+
+static uint16_t sdc_xchg16(uint16_t data) {
+ return eos_spi_xchg16(data, 0);
+}
+
+static uint32_t sdc_xchg32(uint32_t data) {
+ return eos_spi_xchg32(data, 0);
+}
+
+static void sdc_buf_send(unsigned char *buffer, uint16_t len) {
+ int i;
+
+ for (i=0; i<len; i++) {
+ sdc_xchg8(buffer[i]);
+ }
+}
+
+static void sdc_buf_recv(unsigned char *buffer, uint16_t len) {
+ int i;
+
+ for (i=0; i<len; i++) {
+ buffer[i] = sdc_xchg8(0xff);
+ }
+}
+
+static void sdc_select(void) {
+ eos_spi_cs_set();
+ eos_spi_xchg8(0xff, 0);
+}
+
+static void sdc_deselect(void) {
+ eos_spi_cs_clear();
+ eos_spi_xchg8(0xff, 0);
+}
+
+static int sdc_xchg_cmd(uint8_t cmd, uint32_t arg, uint8_t flags) {
+ int i;
+ uint8_t ret;
+ uint8_t crc = 0x7f;
+
+ cmd |= 0x40;
+ if (flags & SDC_CMD_FLAG_CRC) {
+ crc = sdc_crc7(0, cmd);
+ crc = sdc_crc7(crc, arg >> 24);
+ crc = sdc_crc7(crc, arg >> 16);
+ crc = sdc_crc7(crc, arg >> 8);
+ crc = sdc_crc7(crc, arg);
+ }
+ crc = (crc << 1) | 0x01;
+ sdc_xchg8(cmd);
+ sdc_xchg32(arg);
+ sdc_xchg8(crc);
+ if (flags & SDC_CMD_FLAG_RSTUFF) sdc_xchg8(0xff);
+
+ i = SDC_NCR;
+ do {
+ ret = sdc_xchg8(0xff);
+ } while ((ret & 0x80) && --i);
+ if (ret & 0x80) return EOS_ERR_BUSY;
+
+ return ret;
+}
+
+static int sdc_ready(uint32_t timeout) {
+ uint8_t d = 0;
+ uint32_t start;
+
+ if (timeout == 0) return EOS_ERR_BUSY;
+ start = eos_time_get_tick();
+ do {
+ if (eos_time_delta_ms(start) > timeout) break;
+ d = sdc_xchg8(0xff);
+ } while (d != 0xff);
+ if (d != 0xff) return EOS_ERR_BUSY;
+
+ return EOS_OK;
+}
+
+static int sdc_block_read(uint8_t *buffer, uint16_t len, uint32_t timeout) {
+ uint8_t token = 0xff;
+ uint32_t start;
+
+ if (timeout == 0) return EOS_ERR_BUSY;
+ start = eos_time_get_tick();
+ do {
+ if (eos_time_delta_ms(start) > timeout) break;
+ token = sdc_xchg8(0xff);
+ } while (token == 0xff);
+ if (token == 0xff) return EOS_ERR_BUSY;
+ if (token != SDC_TOKEN_START_BLK) return EOS_ERR;
+
+ sdc_buf_recv(buffer, len);
+ sdc_xchg16(0xffff); /* dummy CRC */
+
+ return EOS_OK;
+}
+
+static int sdc_block_write(uint8_t token, uint8_t *buffer, uint16_t len, uint32_t timeout) {
+ uint8_t d;
+ int rv;
+
+ rv = sdc_ready(timeout);
+ if (rv) return rv;
+
+ sdc_xchg8(token);
+ if (buffer && len) {
+ sdc_buf_send(buffer, len);
+ sdc_xchg16(0xffff); /* dummy CRC */
+
+ d = sdc_xchg8(0xff); /* Response */
+ if ((d & SDC_DRESP_MASK) != SDC_DRESP_ACCEPT) return EOS_ERR;
+ }
+
+ return EOS_OK;
+}
+
+static int sdc_cmd(uint8_t cmd, uint32_t arg, uint8_t flags, uint32_t timeout) {
+ int do_cs = !(flags & SDC_CMD_FLAG_NOCS);
+ int do_wait = !(flags & SDC_CMD_FLAG_NOWAIT);
+ int rv = EOS_OK;
+
+ if (do_cs) sdc_select();
+ if (do_wait) rv = sdc_ready(timeout);
+ if (rv) {
+ if (do_cs) sdc_deselect();
+ return rv;
+ }
+ rv = sdc_xchg_cmd(cmd, arg, flags);
+ if (do_cs) sdc_deselect();
+ return rv;
+}
+
+static int sdc_acmd(uint8_t cmd, uint32_t arg, uint8_t flags, uint32_t timeout) {
+ int rv;
+ uint32_t start;
+
+ start = eos_time_get_tick();
+ rv = sdc_cmd(APP_CMD, 0, flags, timeout);
+ if (rv & ~SDC_R1_IDLE_STATE) return rv;
+
+ if (flags & SDC_CMD_FLAG_NOCS) {
+ sdc_deselect();
+ sdc_select();
+ }
+ return sdc_cmd(cmd, arg, flags, sdc_nto(start, timeout));
+}
+
+static int sdc_init(uint32_t timeout) {
+ int rv, i;
+ uint8_t _type;
+ uint8_t ocr[4];
+ uint32_t start;
+ start = eos_time_get_tick();
+
+ eos_time_sleep(100);
+ for (i=10; i--;) sdc_xchg8(0xff); /* 80 dummy cycles */
+
+ rv = sdc_cmd(GO_IDLE_STATE, 0, SDC_CMD_FLAG_CRC, SDC_TIMEOUT_CMD);
+ if (rv != SDC_R1_IDLE_STATE) return SDC_ERR(rv);
+
+ sdc_select();
+ rv = sdc_cmd(SEND_IF_COND, 0x1aa, SDC_CMD_FLAG_CRC | SDC_CMD_FLAG_NOCS, sdc_nto(start, timeout));
+ switch (rv) {
+ case SDC_R1_IDLE_STATE:
+ for (i=0; i<4; i++) { /* R7 response */
+ ocr[i] = sdc_xchg8(0xff);
+ }
+ sdc_deselect();
+ if (ocr[2] == 0x01 && ocr[3] == 0xaa) { /* Check voltage range: 2.7-3.6V */
+ do {
+ rv = sdc_acmd(SD_APP_OP_COND, 0x40000000, 0, sdc_nto(start, timeout));
+ } while (rv == SDC_R1_IDLE_STATE);
+ if (rv != SDC_R1_READY) return SDC_ERR(rv);
+
+ sdc_select();
+ rv = sdc_cmd(READ_OCR, 0, SDC_CMD_FLAG_NOCS, sdc_nto(start, timeout));
+ if (rv == SDC_R1_READY) {
+ for (i=0; i<4; i++) { /* R7 response */
+ ocr[i] = sdc_xchg8(0xff);
+ }
+ sdc_deselect();
+ } else {
+ sdc_deselect();
+ return SDC_ERR(rv);
+ }
+
+ _type = EOS_SDC_TYPE_SDC2;
+ if (ocr[0] & 0xc0) _type |= EOS_SDC_CAP_BLK;
+ }
+ break;
+
+ case SDC_R1_IDLE_STATE | SDC_R1_ILLEGAL_CMD:
+ sdc_deselect();
+ rv = sdc_acmd(SD_APP_OP_COND, 0, 0, sdc_nto(start, timeout));
+ switch (rv) {
+ case SDC_R1_IDLE_STATE:
+ do {
+ rv = sdc_acmd(SD_APP_OP_COND, 0, 0, sdc_nto(start, timeout));
+ } while (rv == SDC_R1_IDLE_STATE);
+ if (rv != SDC_R1_READY) return SDC_ERR(rv);
+ case SDC_R1_READY:
+ _type = EOS_SDC_TYPE_SDC1;
+ break;
+
+ default:
+ do {
+ rv = sdc_cmd(SEND_OP_COND, 0, 0, sdc_nto(start, timeout));
+ } while (rv == SDC_R1_IDLE_STATE);
+ if (rv != SDC_R1_READY) return SDC_ERR(rv);
+ _type = EOS_SDC_TYPE_MMC;
+ break;
+
+ }
+ break;
+
+ default:
+ sdc_deselect();
+ return SDC_ERR(rv);
+ }
+
+ if (!(_type & EOS_SDC_CAP_BLK)) {
+ rv = sdc_cmd(SET_BLOCKLEN, 512, 0, sdc_nto(start, timeout));
+ if (rv != SDC_R1_READY) return SDC_ERR(rv);
+ }
+
+ if (_type & EOS_SDC_TYPE_SDC) {
+ uint8_t csd[16];
+
+ sdc_select();
+ rv = sdc_cmd(SEND_CSD, 0, SDC_CMD_FLAG_NOCS, sdc_nto(start, timeout));
+ if (rv == SDC_R1_READY) {
+ rv = sdc_block_read(csd, 16, sdc_nto(start, timeout));
+ } else {
+ rv = SDC_ERR(rv);
+ }
+ sdc_deselect();
+ if (rv) return rv;
+
+ for (i=0; i<16; i++) {
+ printf("%.2x ", csd[i]);
+ }
+ printf("\n");
+ if (csd[10] & 0x40) _type |= EOS_SDC_CAP_ERASE_EN;
+ }
+
+ eos_spi_set_div(EOS_SPI_DEV_SDC, 5);
+ sdc_type = _type;
+ return EOS_OK;
+}
+
+int eos_sdc_init(uint8_t wakeup_cause) {
+ int rv;
+
+ eos_spi_select(EOS_SPI_DEV_SDC);
+ rv = sdc_init(5000);
+ if (rv) {
+ printf("SDC ERROR\n");
+ } else {
+ printf("SDC OK:%x\n", sdc_type);
+ }
+ eos_spi_deselect();
+
+ return EOS_OK;
+}
+
+uint8_t eos_sdc_type(void) {
+ return sdc_type & EOS_SDC_TYPE_MASK;
+}
+
+uint8_t eos_sdc_cap(void) {
+ return sdc_type & EOS_SDC_CAP_MASK;
+}
+
+int eos_sdc_get_sect_count(uint32_t timeout, uint32_t *sectors) {
+ int rv;
+ uint8_t csd[16];
+ uint32_t start = eos_time_get_tick();
+
+ sdc_select();
+ rv = sdc_cmd(SEND_CSD, 0, SDC_CMD_FLAG_NOCS, timeout);
+ if (rv == SDC_R1_READY) {
+ rv = sdc_block_read(csd, 16, sdc_nto(start, timeout));
+ } else {
+ rv = SDC_ERR(rv);
+ }
+ sdc_deselect();
+ if (rv) return rv;
+
+ if ((csd[0] >> 6) == 1) { /* SDCv2 */
+ *sectors = (csd[9] + (csd[8] << 8) + ((csd[7] & 0x3f) << 16) + 1) << 10;
+ } else { /* SDCv1 or MMC*/
+ uint8_t n = (csd[5] & 0x0f) + (csd[10] >> 7) + ((csd[9] & 0x03) << 1) + 2;
+ *sectors = (csd[8] >> 6) + (csd[7] << 2) + ((csd[6] & 0x03) << 10) + 1;
+ *sectors = *sectors << (n - 9);
+ }
+
+ return EOS_OK;
+}
+
+int eos_sdc_get_blk_size(uint32_t timeout, uint32_t *size) {
+ int rv;
+ uint8_t rbl[64]; /* SD Status or CSD register */
+ uint32_t start = eos_time_get_tick();
+
+ sdc_select();
+ if (sdc_type & EOS_SDC_TYPE_SDC2) {
+ rv = sdc_acmd(SD_STATUS, 0, SDC_CMD_FLAG_NOCS, timeout);
+ sdc_xchg8(0xff); /* R2 response */
+ } else {
+ rv = sdc_cmd(SEND_CSD, 0, SDC_CMD_FLAG_NOCS, timeout);
+ }
+ if (rv == SDC_R1_READY) {
+ rv = sdc_block_read(rbl, (sdc_type & EOS_SDC_TYPE_SDC2) ? 64 : 16, sdc_nto(start, timeout));
+ } else {
+ rv = SDC_ERR(rv);
+ }
+ sdc_deselect();
+ if (rv) return rv;
+
+ if (sdc_type & EOS_SDC_TYPE_SDC2) {
+ *size = 16UL << (rbl[10] >> 4);
+ } else if (sdc_type & EOS_SDC_TYPE_SDC1) {
+ *size = (((rbl[10] & 0x3f) << 1) + (rbl[11] >> 7) + 1) << ((rbl[13] >> 6) - 1);
+ } else {
+ *size = (((rbl[10] & 0x7c) >> 2) + 1) * (((rbl[11] & 0x03) << 3) + (rbl[11] >> 5) + 1);
+ }
+
+ return EOS_OK;
+}
+
+int eos_sdc_sync(uint32_t timeout) {
+ int rv;
+
+ sdc_select();
+ rv = sdc_ready(timeout);
+ sdc_deselect();
+
+ return rv;
+}
+
+int eos_sdc_erase(uint32_t blk_start, uint32_t blk_end, uint32_t timeout) {
+ int rv;
+ uint32_t start;
+
+ if (!(sdc_type & EOS_SDC_TYPE_SDC)) return EOS_ERR;
+ if (!(sdc_type & EOS_SDC_CAP_ERASE_EN)) return EOS_ERR;
+ if (!(sdc_type & EOS_SDC_CAP_BLK)) {
+ blk_start *= 512;
+ blk_end *= 512;
+ }
+
+ start = eos_time_get_tick();
+ rv = sdc_cmd(ERASE_WR_BLK_START, blk_start, 0, timeout);
+ if (rv != SDC_R1_READY) return SDC_ERR(rv);
+
+ rv = sdc_cmd(ERASE_WR_BLK_END, blk_end, 0, sdc_nto(start, timeout));
+ if (rv != SDC_R1_READY) return SDC_ERR(rv);
+
+ rv = sdc_cmd(ERASE, 0, 0, sdc_nto(start, timeout));
+ if (rv != SDC_R1_READY) return SDC_ERR(rv);
+
+ return eos_sdc_sync(sdc_nto(start, timeout));
+}
+
+int eos_sdc_sect_read(uint32_t sect, unsigned int count, uint8_t *buffer) {
+ int rv;
+ uint8_t cmd = ((count == 1) ? READ_SINGLE_BLOCK : READ_MULTIPLE_BLOCK);
+
+ if (!(sdc_type & EOS_SDC_CAP_BLK)) sect *= 512;
+
+ sdc_select();
+ rv = sdc_cmd(cmd, sect, SDC_CMD_FLAG_NOCS, SDC_TIMEOUT_CMD);
+ if (rv == SDC_R1_READY) {
+ int _rv = SDC_R1_READY;
+
+ while (count) {
+ rv = sdc_block_read(buffer, 512, SDC_TIMEOUT_READ);
+ if (rv) break;
+ eos_sdcc_decrypt(sect, buffer);
+ buffer += 512;
+ count--;
+ }
+ if (cmd == READ_MULTIPLE_BLOCK) _rv = sdc_cmd(STOP_TRANSMISSION, 0, SDC_CMD_FLAG_NOCS | SDC_CMD_FLAG_NOWAIT | SDC_CMD_FLAG_RSTUFF, 0);
+ if (!rv && (_rv != SDC_R1_READY)) rv = SDC_ERR(_rv);
+ } else {
+ rv = SDC_ERR(rv);
+ }
+ sdc_deselect();
+
+ return rv;
+}
+
+int eos_sdc_sect_write(uint32_t sect, unsigned int count, uint8_t *buffer) {
+ int rv;
+
+ if (!(sdc_type & EOS_SDC_CAP_BLK)) sect *= 512;
+
+ if (count == 1) {
+ sdc_select();
+ rv = sdc_cmd(WRITE_BLOCK, sect, SDC_CMD_FLAG_NOCS, SDC_TIMEOUT_CMD);
+ if (rv == SDC_R1_READY) {
+ eos_sdcc_encrypt(sect, buffer);
+ rv = sdc_block_write(SDC_TOKEN_START_BLK, buffer, 512, SDC_TIMEOUT_WRITE);
+ } else {
+ rv = SDC_ERR(rv);
+ }
+ sdc_deselect();
+ } else {
+ if (sdc_type & EOS_SDC_TYPE_SDC) {
+ rv = sdc_acmd(SET_WR_BLK_ERASE_COUNT, count, 0, SDC_TIMEOUT_CMD);
+ if (rv != SDC_R1_READY) return SDC_ERR(rv);
+ }
+
+ sdc_select();
+ rv = sdc_cmd(WRITE_MULTIPLE_BLOCK, sect, SDC_CMD_FLAG_NOCS, SDC_TIMEOUT_CMD);
+ if (rv == SDC_R1_READY) {
+ int _rv;
+
+ while (count) {
+ eos_sdcc_encrypt(sect, buffer);
+ rv = sdc_block_write(SDC_TOKEN_START_BLKM, buffer, 512, SDC_TIMEOUT_WRITE);
+ if (rv) break;
+ buffer += 512;
+ count--;
+ }
+ _rv = sdc_block_write(SDC_TOKEN_STOP_TRAN, NULL, 0, SDC_TIMEOUT_WRITE);
+ if (!rv && (_rv != SDC_R1_READY)) rv = SDC_ERR(_rv);
+ } else {
+ rv = SDC_ERR(rv);
+ }
+ sdc_deselect();
+ }
+
+ return rv;
+}