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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 SDBus sdbus;
51} ssi_sd_state;
52
53#define TYPE_SSI_SD "ssi-sd"
54#define SSI_SD(obj) OBJECT_CHECK(ssi_sd_state, (obj), TYPE_SSI_SD)
55
56
57#define SSI_SDR_LOCKED 0x0001
58#define SSI_SDR_WP_ERASE 0x0002
59#define SSI_SDR_ERROR 0x0004
60#define SSI_SDR_CC_ERROR 0x0008
61#define SSI_SDR_ECC_FAILED 0x0010
62#define SSI_SDR_WP_VIOLATION 0x0020
63#define SSI_SDR_ERASE_PARAM 0x0040
64#define SSI_SDR_OUT_OF_RANGE 0x0080
65#define SSI_SDR_IDLE 0x0100
66#define SSI_SDR_ERASE_RESET 0x0200
67#define SSI_SDR_ILLEGAL_COMMAND 0x0400
68#define SSI_SDR_COM_CRC_ERROR 0x0800
69#define SSI_SDR_ERASE_SEQ_ERROR 0x1000
70#define SSI_SDR_ADDRESS_ERROR 0x2000
71#define SSI_SDR_PARAMETER_ERROR 0x4000
72
73static uint32_t ssi_sd_transfer(SSISlave *dev, uint32_t val)
74{
75 ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, dev);
76
77
78 if (s->mode == SSI_SD_DATA_READ && val == 0x4d) {
79 s->mode = SSI_SD_CMD;
80
81 s->stopping = 1;
82 }
83
84 switch (s->mode) {
85 case SSI_SD_CMD:
86 if (val == 0xff) {
87 DPRINTF("NULL command\n");
88 return 0xff;
89 }
90 s->cmd = val & 0x3f;
91 s->mode = SSI_SD_CMDARG;
92 s->arglen = 0;
93 return 0xff;
94 case SSI_SD_CMDARG:
95 if (s->arglen == 4) {
96 SDRequest request;
97 uint8_t longresp[16];
98
99 request.cmd = s->cmd;
100 request.arg = (s->cmdarg[0] << 24) | (s->cmdarg[1] << 16)
101 | (s->cmdarg[2] << 8) | s->cmdarg[3];
102 DPRINTF("CMD%d arg 0x%08x\n", s->cmd, request.arg);
103 s->arglen = sdbus_do_command(&s->sdbus, &request, longresp);
104 if (s->arglen <= 0) {
105 s->arglen = 1;
106 s->response[0] = 4;
107 DPRINTF("SD command failed\n");
108 } else if (s->cmd == 58) {
109
110 DPRINTF("Returned OCR\n");
111 s->arglen = 5;
112 s->response[0] = 1;
113 memcpy(&s->response[1], longresp, 4);
114 } else if (s->arglen != 4) {
115 BADF("Unexpected response to cmd %d\n", s->cmd);
116
117 s->arglen = 1;
118 s->response[0] = 4;
119 } else {
120
121 uint32_t cardstatus;
122 uint16_t status;
123
124
125 s->arglen = (s->cmd == 13) ? 2 : 1;
126 cardstatus = (longresp[0] << 24) | (longresp[1] << 16)
127 | (longresp[2] << 8) | longresp[3];
128 status = 0;
129 if (((cardstatus >> 9) & 0xf) < 4)
130 status |= SSI_SDR_IDLE;
131 if (cardstatus & ERASE_RESET)
132 status |= SSI_SDR_ERASE_RESET;
133 if (cardstatus & ILLEGAL_COMMAND)
134 status |= SSI_SDR_ILLEGAL_COMMAND;
135 if (cardstatus & COM_CRC_ERROR)
136 status |= SSI_SDR_COM_CRC_ERROR;
137 if (cardstatus & ERASE_SEQ_ERROR)
138 status |= SSI_SDR_ERASE_SEQ_ERROR;
139 if (cardstatus & ADDRESS_ERROR)
140 status |= SSI_SDR_ADDRESS_ERROR;
141 if (cardstatus & CARD_IS_LOCKED)
142 status |= SSI_SDR_LOCKED;
143 if (cardstatus & (LOCK_UNLOCK_FAILED | WP_ERASE_SKIP))
144 status |= SSI_SDR_WP_ERASE;
145 if (cardstatus & SD_ERROR)
146 status |= SSI_SDR_ERROR;
147 if (cardstatus & CC_ERROR)
148 status |= SSI_SDR_CC_ERROR;
149 if (cardstatus & CARD_ECC_FAILED)
150 status |= SSI_SDR_ECC_FAILED;
151 if (cardstatus & WP_VIOLATION)
152 status |= SSI_SDR_WP_VIOLATION;
153 if (cardstatus & ERASE_PARAM)
154 status |= SSI_SDR_ERASE_PARAM;
155 if (cardstatus & (OUT_OF_RANGE | CID_CSD_OVERWRITE))
156 status |= SSI_SDR_OUT_OF_RANGE;
157
158
159 if (status & 0xff)
160 status |= SSI_SDR_PARAMETER_ERROR;
161 s->response[0] = status >> 8;
162 s->response[1] = status;
163 DPRINTF("Card status 0x%02x\n", status);
164 }
165 s->mode = SSI_SD_RESPONSE;
166 s->response_pos = 0;
167 } else {
168 s->cmdarg[s->arglen++] = val;
169 }
170 return 0xff;
171 case SSI_SD_RESPONSE:
172 if (s->stopping) {
173 s->stopping = 0;
174 return 0xff;
175 }
176 if (s->response_pos < s->arglen) {
177 DPRINTF("Response 0x%02x\n", s->response[s->response_pos]);
178 return s->response[s->response_pos++];
179 }
180 if (sdbus_data_ready(&s->sdbus)) {
181 DPRINTF("Data read\n");
182 s->mode = SSI_SD_DATA_START;
183 } else {
184 DPRINTF("End of command\n");
185 s->mode = SSI_SD_CMD;
186 }
187 return 0xff;
188 case SSI_SD_DATA_START:
189 DPRINTF("Start read block\n");
190 s->mode = SSI_SD_DATA_READ;
191 return 0xfe;
192 case SSI_SD_DATA_READ:
193 val = sdbus_read_data(&s->sdbus);
194 if (!sdbus_data_ready(&s->sdbus)) {
195 DPRINTF("Data read end\n");
196 s->mode = SSI_SD_CMD;
197 }
198 return val;
199 }
200
201 return 0xff;
202}
203
204static int ssi_sd_post_load(void *opaque, int version_id)
205{
206 ssi_sd_state *s = (ssi_sd_state *)opaque;
207
208 if (s->mode > SSI_SD_DATA_READ) {
209 return -EINVAL;
210 }
211 if (s->mode == SSI_SD_CMDARG &&
212 (s->arglen < 0 || s->arglen >= ARRAY_SIZE(s->cmdarg))) {
213 return -EINVAL;
214 }
215 if (s->mode == SSI_SD_RESPONSE &&
216 (s->response_pos < 0 || s->response_pos >= ARRAY_SIZE(s->response) ||
217 (!s->stopping && s->arglen > ARRAY_SIZE(s->response)))) {
218 return -EINVAL;
219 }
220
221 return 0;
222}
223
224static const VMStateDescription vmstate_ssi_sd = {
225 .name = "ssi_sd",
226 .version_id = 2,
227 .minimum_version_id = 2,
228 .post_load = ssi_sd_post_load,
229 .fields = (VMStateField []) {
230 VMSTATE_UINT32(mode, ssi_sd_state),
231 VMSTATE_INT32(cmd, ssi_sd_state),
232 VMSTATE_UINT8_ARRAY(cmdarg, ssi_sd_state, 4),
233 VMSTATE_UINT8_ARRAY(response, ssi_sd_state, 5),
234 VMSTATE_INT32(arglen, ssi_sd_state),
235 VMSTATE_INT32(response_pos, ssi_sd_state),
236 VMSTATE_INT32(stopping, ssi_sd_state),
237 VMSTATE_SSI_SLAVE(ssidev, ssi_sd_state),
238 VMSTATE_END_OF_LIST()
239 }
240};
241
242static void ssi_sd_realize(SSISlave *d, Error **errp)
243{
244 ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, d);
245 DeviceState *carddev;
246 DriveInfo *dinfo;
247 Error *err = NULL;
248
249 qbus_create_inplace(&s->sdbus, sizeof(s->sdbus), TYPE_SD_BUS,
250 DEVICE(d), "sd-bus");
251
252
253
254 dinfo = drive_get_next(IF_SD);
255 carddev = qdev_create(&s->sdbus.qbus, TYPE_SD_CARD);
256 if (dinfo) {
257 qdev_prop_set_drive(carddev, "drive", blk_by_legacy_dinfo(dinfo), &err);
258 }
259 object_property_set_bool(OBJECT(carddev), true, "spi", &err);
260 object_property_set_bool(OBJECT(carddev), true, "realized", &err);
261 if (err) {
262 error_setg(errp, "failed to init SD card: %s", error_get_pretty(err));
263 return;
264 }
265}
266
267static void ssi_sd_reset(DeviceState *dev)
268{
269 ssi_sd_state *s = SSI_SD(dev);
270
271 s->mode = SSI_SD_CMD;
272 s->cmd = 0;
273 memset(s->cmdarg, 0, sizeof(s->cmdarg));
274 memset(s->response, 0, sizeof(s->response));
275 s->arglen = 0;
276 s->response_pos = 0;
277 s->stopping = 0;
278}
279
280static void ssi_sd_class_init(ObjectClass *klass, void *data)
281{
282 DeviceClass *dc = DEVICE_CLASS(klass);
283 SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
284
285 k->realize = ssi_sd_realize;
286 k->transfer = ssi_sd_transfer;
287 k->cs_polarity = SSI_CS_LOW;
288 dc->vmsd = &vmstate_ssi_sd;
289 dc->reset = ssi_sd_reset;
290}
291
292static const TypeInfo ssi_sd_info = {
293 .name = TYPE_SSI_SD,
294 .parent = TYPE_SSI_SLAVE,
295 .instance_size = sizeof(ssi_sd_state),
296 .class_init = ssi_sd_class_init,
297};
298
299static void ssi_sd_register_types(void)
300{
301 type_register_static(&ssi_sd_info);
302}
303
304type_init(ssi_sd_register_types)
305
