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13#include "qemu/osdep.h"
14#include "sysemu/block-backend.h"
15#include "sysemu/blockdev.h"
16#include "hw/ssi/ssi.h"
17#include "hw/sd/sd.h"
18#include "qapi/error.h"
19
20
21
22#ifdef DEBUG_SSI_SD
23#define DPRINTF(fmt, ...) \
24do { printf("ssi_sd: " fmt , ## __VA_ARGS__); } while (0)
25#define BADF(fmt, ...) \
26do { fprintf(stderr, "ssi_sd: error: " fmt , ## __VA_ARGS__); exit(1);} while (0)
27#else
28#define DPRINTF(fmt, ...) do {} while(0)
29#define BADF(fmt, ...) \
30do { fprintf(stderr, "ssi_sd: error: " fmt , ## __VA_ARGS__);} while (0)
31#endif
32
33typedef enum {
34 SSI_SD_CMD = 0,
35 SSI_SD_CMDARG,
36 SSI_SD_RESPONSE,
37 SSI_SD_DATA_START,
38 SSI_SD_DATA_READ,
39} ssi_sd_mode;
40
41typedef struct {
42 SSISlave ssidev;
43 uint32_t mode;
44 int cmd;
45 uint8_t cmdarg[4];
46 uint8_t response[5];
47 int32_t arglen;
48 int32_t response_pos;
49 int32_t stopping;
50 SDState *sd;
51} ssi_sd_state;
52
53
54#define SSI_SDR_LOCKED 0x0001
55#define SSI_SDR_WP_ERASE 0x0002
56#define SSI_SDR_ERROR 0x0004
57#define SSI_SDR_CC_ERROR 0x0008
58#define SSI_SDR_ECC_FAILED 0x0010
59#define SSI_SDR_WP_VIOLATION 0x0020
60#define SSI_SDR_ERASE_PARAM 0x0040
61#define SSI_SDR_OUT_OF_RANGE 0x0080
62#define SSI_SDR_IDLE 0x0100
63#define SSI_SDR_ERASE_RESET 0x0200
64#define SSI_SDR_ILLEGAL_COMMAND 0x0400
65#define SSI_SDR_COM_CRC_ERROR 0x0800
66#define SSI_SDR_ERASE_SEQ_ERROR 0x1000
67#define SSI_SDR_ADDRESS_ERROR 0x2000
68#define SSI_SDR_PARAMETER_ERROR 0x4000
69
70static uint32_t ssi_sd_transfer(SSISlave *dev, uint32_t val)
71{
72 ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, dev);
73
74
75 if (s->mode == SSI_SD_DATA_READ && val == 0x4d) {
76 s->mode = SSI_SD_CMD;
77
78 s->stopping = 1;
79 }
80
81 switch (s->mode) {
82 case SSI_SD_CMD:
83 if (val == 0xff) {
84 DPRINTF("NULL command\n");
85 return 0xff;
86 }
87 s->cmd = val & 0x3f;
88 s->mode = SSI_SD_CMDARG;
89 s->arglen = 0;
90 return 0xff;
91 case SSI_SD_CMDARG:
92 if (s->arglen == 4) {
93 SDRequest request;
94 uint8_t longresp[16];
95
96 request.cmd = s->cmd;
97 request.arg = (s->cmdarg[0] << 24) | (s->cmdarg[1] << 16)
98 | (s->cmdarg[2] << 8) | s->cmdarg[3];
99 DPRINTF("CMD%d arg 0x%08x\n", s->cmd, request.arg);
100 s->arglen = sd_do_command(s->sd, &request, longresp);
101 if (s->arglen <= 0) {
102 s->arglen = 1;
103 s->response[0] = 4;
104 DPRINTF("SD command failed\n");
105 } else if (s->cmd == 58) {
106
107 DPRINTF("Returned OCR\n");
108 s->arglen = 5;
109 s->response[0] = 1;
110 memcpy(&s->response[1], longresp, 4);
111 } else if (s->arglen != 4) {
112 BADF("Unexpected response to cmd %d\n", s->cmd);
113
114 s->arglen = 1;
115 s->response[0] = 4;
116 } else {
117
118 uint32_t cardstatus;
119 uint16_t status;
120
121
122 s->arglen = (s->cmd == 13) ? 2 : 1;
123 cardstatus = (longresp[0] << 24) | (longresp[1] << 16)
124 | (longresp[2] << 8) | longresp[3];
125 status = 0;
126 if (((cardstatus >> 9) & 0xf) < 4)
127 status |= SSI_SDR_IDLE;
128 if (cardstatus & ERASE_RESET)
129 status |= SSI_SDR_ERASE_RESET;
130 if (cardstatus & ILLEGAL_COMMAND)
131 status |= SSI_SDR_ILLEGAL_COMMAND;
132 if (cardstatus & COM_CRC_ERROR)
133 status |= SSI_SDR_COM_CRC_ERROR;
134 if (cardstatus & ERASE_SEQ_ERROR)
135 status |= SSI_SDR_ERASE_SEQ_ERROR;
136 if (cardstatus & ADDRESS_ERROR)
137 status |= SSI_SDR_ADDRESS_ERROR;
138 if (cardstatus & CARD_IS_LOCKED)
139 status |= SSI_SDR_LOCKED;
140 if (cardstatus & (LOCK_UNLOCK_FAILED | WP_ERASE_SKIP))
141 status |= SSI_SDR_WP_ERASE;
142 if (cardstatus & SD_ERROR)
143 status |= SSI_SDR_ERROR;
144 if (cardstatus & CC_ERROR)
145 status |= SSI_SDR_CC_ERROR;
146 if (cardstatus & CARD_ECC_FAILED)
147 status |= SSI_SDR_ECC_FAILED;
148 if (cardstatus & WP_VIOLATION)
149 status |= SSI_SDR_WP_VIOLATION;
150 if (cardstatus & ERASE_PARAM)
151 status |= SSI_SDR_ERASE_PARAM;
152 if (cardstatus & (OUT_OF_RANGE | CID_CSD_OVERWRITE))
153 status |= SSI_SDR_OUT_OF_RANGE;
154
155
156 if (status & 0xff)
157 status |= SSI_SDR_PARAMETER_ERROR;
158 s->response[0] = status >> 8;
159 s->response[1] = status;
160 DPRINTF("Card status 0x%02x\n", status);
161 }
162 s->mode = SSI_SD_RESPONSE;
163 s->response_pos = 0;
164 } else {
165 s->cmdarg[s->arglen++] = val;
166 }
167 return 0xff;
168 case SSI_SD_RESPONSE:
169 if (s->stopping) {
170 s->stopping = 0;
171 return 0xff;
172 }
173 if (s->response_pos < s->arglen) {
174 DPRINTF("Response 0x%02x\n", s->response[s->response_pos]);
175 return s->response[s->response_pos++];
176 }
177 if (sd_data_ready(s->sd)) {
178 DPRINTF("Data read\n");
179 s->mode = SSI_SD_DATA_START;
180 } else {
181 DPRINTF("End of command\n");
182 s->mode = SSI_SD_CMD;
183 }
184 return 0xff;
185 case SSI_SD_DATA_START:
186 DPRINTF("Start read block\n");
187 s->mode = SSI_SD_DATA_READ;
188 return 0xfe;
189 case SSI_SD_DATA_READ:
190 val = sd_read_data(s->sd);
191 if (!sd_data_ready(s->sd)) {
192 DPRINTF("Data read end\n");
193 s->mode = SSI_SD_CMD;
194 }
195 return val;
196 }
197
198 return 0xff;
199}
200
201static int ssi_sd_post_load(void *opaque, int version_id)
202{
203 ssi_sd_state *s = (ssi_sd_state *)opaque;
204
205 if (s->mode > SSI_SD_DATA_READ) {
206 return -EINVAL;
207 }
208 if (s->mode == SSI_SD_CMDARG &&
209 (s->arglen < 0 || s->arglen >= ARRAY_SIZE(s->cmdarg))) {
210 return -EINVAL;
211 }
212 if (s->mode == SSI_SD_RESPONSE &&
213 (s->response_pos < 0 || s->response_pos >= ARRAY_SIZE(s->response) ||
214 (!s->stopping && s->arglen > ARRAY_SIZE(s->response)))) {
215 return -EINVAL;
216 }
217
218 return 0;
219}
220
221static const VMStateDescription vmstate_ssi_sd = {
222 .name = "ssi_sd",
223 .version_id = 2,
224 .minimum_version_id = 2,
225 .post_load = ssi_sd_post_load,
226 .fields = (VMStateField []) {
227 VMSTATE_UINT32(mode, ssi_sd_state),
228 VMSTATE_INT32(cmd, ssi_sd_state),
229 VMSTATE_UINT8_ARRAY(cmdarg, ssi_sd_state, 4),
230 VMSTATE_UINT8_ARRAY(response, ssi_sd_state, 5),
231 VMSTATE_INT32(arglen, ssi_sd_state),
232 VMSTATE_INT32(response_pos, ssi_sd_state),
233 VMSTATE_INT32(stopping, ssi_sd_state),
234 VMSTATE_SSI_SLAVE(ssidev, ssi_sd_state),
235 VMSTATE_END_OF_LIST()
236 }
237};
238
239static void ssi_sd_realize(SSISlave *d, Error **errp)
240{
241 ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, d);
242 DriveInfo *dinfo;
243
244 s->mode = SSI_SD_CMD;
245
246 dinfo = drive_get_next(IF_SD);
247 s->sd = sd_init(dinfo ? blk_by_legacy_dinfo(dinfo) : NULL, true);
248 if (s->sd == NULL) {
249 error_setg(errp, "Device initialization failed.");
250 return;
251 }
252}
253
254static void ssi_sd_class_init(ObjectClass *klass, void *data)
255{
256 DeviceClass *dc = DEVICE_CLASS(klass);
257 SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
258
259 k->realize = ssi_sd_realize;
260 k->transfer = ssi_sd_transfer;
261 k->cs_polarity = SSI_CS_LOW;
262 dc->vmsd = &vmstate_ssi_sd;
263}
264
265static const TypeInfo ssi_sd_info = {
266 .name = "ssi-sd",
267 .parent = TYPE_SSI_SLAVE,
268 .instance_size = sizeof(ssi_sd_state),
269 .class_init = ssi_sd_class_init,
270};
271
272static void ssi_sd_register_types(void)
273{
274 type_register_static(&ssi_sd_info);
275}
276
277type_init(ssi_sd_register_types)
278
