2 * SSI to SD card adapter.
4 * Copyright (c) 2007-2009 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licensed under the GNU GPL v2.
9 * Contributions after 2012-01-13 are licensed under the terms of the
10 * GNU GPL, version 2 or (at your option) any later version.
17 //#define DEBUG_SSI_SD 1
20 #define DPRINTF(fmt, ...) \
21 do { printf("ssi_sd: " fmt , ## __VA_ARGS__); } while (0)
22 #define BADF(fmt, ...) \
23 do { fprintf(stderr, "ssi_sd: error: " fmt , ## __VA_ARGS__); exit(1);} while (0)
25 #define DPRINTF(fmt, ...) do {} while(0)
26 #define BADF(fmt, ...) \
27 do { fprintf(stderr, "ssi_sd: error: " fmt , ## __VA_ARGS__);} while (0)
50 /* State word bits. */
51 #define SSI_SDR_LOCKED 0x0001
52 #define SSI_SDR_WP_ERASE 0x0002
53 #define SSI_SDR_ERROR 0x0004
54 #define SSI_SDR_CC_ERROR 0x0008
55 #define SSI_SDR_ECC_FAILED 0x0010
56 #define SSI_SDR_WP_VIOLATION 0x0020
57 #define SSI_SDR_ERASE_PARAM 0x0040
58 #define SSI_SDR_OUT_OF_RANGE 0x0080
59 #define SSI_SDR_IDLE 0x0100
60 #define SSI_SDR_ERASE_RESET 0x0200
61 #define SSI_SDR_ILLEGAL_COMMAND 0x0400
62 #define SSI_SDR_COM_CRC_ERROR 0x0800
63 #define SSI_SDR_ERASE_SEQ_ERROR 0x1000
64 #define SSI_SDR_ADDRESS_ERROR 0x2000
65 #define SSI_SDR_PARAMETER_ERROR 0x4000
67 static uint32_t ssi_sd_transfer(SSISlave *dev, uint32_t val)
69 ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, dev);
71 /* Special case: allow CMD12 (STOP TRANSMISSION) while reading data. */
72 if (s->mode == SSI_SD_DATA_READ && val == 0x4d) {
74 /* There must be at least one byte delay before the card responds. */
81 DPRINTF("NULL command\n");
85 s->mode = SSI_SD_CMDARG;
92 /* FIXME: Check CRC. */
94 request.arg = (s->cmdarg[0] << 24) | (s->cmdarg[1] << 16)
95 | (s->cmdarg[2] << 8) | s->cmdarg[3];
96 DPRINTF("CMD%d arg 0x%08x\n", s->cmd, request.arg);
97 s->arglen = sd_do_command(s->sd, &request, longresp);
101 DPRINTF("SD command failed\n");
102 } else if (s->cmd == 58) {
103 /* CMD58 returns R3 response (OCR) */
104 DPRINTF("Returned OCR\n");
107 memcpy(&s->response[1], longresp, 4);
108 } else if (s->arglen != 4) {
109 BADF("Unexpected response to cmd %d\n", s->cmd);
110 /* Illegal command is about as near as we can get. */
114 /* All other commands return status. */
117 /* CMD13 returns a 2-byte statuse work. Other commands
118 only return the first byte. */
119 s->arglen = (s->cmd == 13) ? 2 : 1;
120 cardstatus = (longresp[0] << 24) | (longresp[1] << 16)
121 | (longresp[2] << 8) | longresp[3];
123 if (((cardstatus >> 9) & 0xf) < 4)
124 status |= SSI_SDR_IDLE;
125 if (cardstatus & ERASE_RESET)
126 status |= SSI_SDR_ERASE_RESET;
127 if (cardstatus & ILLEGAL_COMMAND)
128 status |= SSI_SDR_ILLEGAL_COMMAND;
129 if (cardstatus & COM_CRC_ERROR)
130 status |= SSI_SDR_COM_CRC_ERROR;
131 if (cardstatus & ERASE_SEQ_ERROR)
132 status |= SSI_SDR_ERASE_SEQ_ERROR;
133 if (cardstatus & ADDRESS_ERROR)
134 status |= SSI_SDR_ADDRESS_ERROR;
135 if (cardstatus & CARD_IS_LOCKED)
136 status |= SSI_SDR_LOCKED;
137 if (cardstatus & (LOCK_UNLOCK_FAILED | WP_ERASE_SKIP))
138 status |= SSI_SDR_WP_ERASE;
139 if (cardstatus & SD_ERROR)
140 status |= SSI_SDR_ERROR;
141 if (cardstatus & CC_ERROR)
142 status |= SSI_SDR_CC_ERROR;
143 if (cardstatus & CARD_ECC_FAILED)
144 status |= SSI_SDR_ECC_FAILED;
145 if (cardstatus & WP_VIOLATION)
146 status |= SSI_SDR_WP_VIOLATION;
147 if (cardstatus & ERASE_PARAM)
148 status |= SSI_SDR_ERASE_PARAM;
149 if (cardstatus & (OUT_OF_RANGE | CID_CSD_OVERWRITE))
150 status |= SSI_SDR_OUT_OF_RANGE;
151 /* ??? Don't know what Parameter Error really means, so
152 assume it's set if the second byte is nonzero. */
154 status |= SSI_SDR_PARAMETER_ERROR;
155 s->response[0] = status >> 8;
156 s->response[1] = status;
157 DPRINTF("Card status 0x%02x\n", status);
159 s->mode = SSI_SD_RESPONSE;
162 s->cmdarg[s->arglen++] = val;
165 case SSI_SD_RESPONSE:
170 if (s->response_pos < s->arglen) {
171 DPRINTF("Response 0x%02x\n", s->response[s->response_pos]);
172 return s->response[s->response_pos++];
174 if (sd_data_ready(s->sd)) {
175 DPRINTF("Data read\n");
176 s->mode = SSI_SD_DATA_START;
178 DPRINTF("End of command\n");
179 s->mode = SSI_SD_CMD;
182 case SSI_SD_DATA_START:
183 DPRINTF("Start read block\n");
184 s->mode = SSI_SD_DATA_READ;
186 case SSI_SD_DATA_READ:
187 val = sd_read_data(s->sd);
188 if (!sd_data_ready(s->sd)) {
189 DPRINTF("Data read end\n");
190 s->mode = SSI_SD_CMD;
194 /* Should never happen. */
198 static void ssi_sd_save(QEMUFile *f, void *opaque)
200 ssi_sd_state *s = (ssi_sd_state *)opaque;
203 qemu_put_be32(f, s->mode);
204 qemu_put_be32(f, s->cmd);
205 for (i = 0; i < 4; i++)
206 qemu_put_be32(f, s->cmdarg[i]);
207 for (i = 0; i < 5; i++)
208 qemu_put_be32(f, s->response[i]);
209 qemu_put_be32(f, s->arglen);
210 qemu_put_be32(f, s->response_pos);
211 qemu_put_be32(f, s->stopping);
214 static int ssi_sd_load(QEMUFile *f, void *opaque, int version_id)
216 ssi_sd_state *s = (ssi_sd_state *)opaque;
222 s->mode = qemu_get_be32(f);
223 s->cmd = qemu_get_be32(f);
224 for (i = 0; i < 4; i++)
225 s->cmdarg[i] = qemu_get_be32(f);
226 for (i = 0; i < 5; i++)
227 s->response[i] = qemu_get_be32(f);
228 s->arglen = qemu_get_be32(f);
229 s->response_pos = qemu_get_be32(f);
230 s->stopping = qemu_get_be32(f);
235 static int ssi_sd_init(SSISlave *dev)
237 ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, dev);
240 s->mode = SSI_SD_CMD;
241 dinfo = drive_get_next(IF_SD);
242 s->sd = sd_init(dinfo ? dinfo->bdrv : NULL, 1);
243 register_savevm(&dev->qdev, "ssi_sd", -1, 1, ssi_sd_save, ssi_sd_load, s);
247 static void ssi_sd_class_init(ObjectClass *klass, void *data)
249 SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
251 k->init = ssi_sd_init;
252 k->transfer = ssi_sd_transfer;
255 static TypeInfo ssi_sd_info = {
257 .parent = TYPE_SSI_SLAVE,
258 .instance_size = sizeof(ssi_sd_state),
259 .class_init = ssi_sd_class_init,
262 static void ssi_sd_register_devices(void)
264 type_register_static(&ssi_sd_info);
267 device_init(ssi_sd_register_devices)