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7#include <common.h>
8#include <dm.h>
9#include <os.h>
10#include <scsi.h>
11#include <usb.h>
12
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17
18
19enum {
20 SANDBOX_FLASH_EP_OUT = 1,
21 SANDBOX_FLASH_EP_IN = 2,
22 SANDBOX_FLASH_BLOCK_LEN = 512,
23};
24
25enum cmd_phase {
26 PHASE_START,
27 PHASE_DATA,
28 PHASE_STATUS,
29};
30
31enum {
32 STRINGID_MANUFACTURER = 1,
33 STRINGID_PRODUCT,
34 STRINGID_SERIAL,
35
36 STRINGID_COUNT,
37};
38
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51
52
53struct sandbox_flash_priv {
54 bool error;
55 int alloc_len;
56 int transfer_len;
57 int read_len;
58 enum cmd_phase phase;
59 u32 tag;
60 int fd;
61 loff_t file_size;
62 struct umass_bbb_csw status;
63 int buff_used;
64 u8 buff[512];
65};
66
67struct sandbox_flash_plat {
68 const char *pathname;
69 struct usb_string flash_strings[STRINGID_COUNT];
70};
71
72struct scsi_inquiry_resp {
73 u8 type;
74 u8 flags;
75 u8 version;
76 u8 data_format;
77 u8 additional_len;
78 u8 spare[3];
79 char vendor[8];
80 char product[16];
81 char revision[4];
82};
83
84struct scsi_read_capacity_resp {
85 u32 last_block_addr;
86 u32 block_len;
87};
88
89struct __packed scsi_read10_req {
90 u8 cmd;
91 u8 lun_flags;
92 u32 lba;
93 u8 spare;
94 u16 transfer_len;
95 u8 spare2[3];
96};
97
98static struct usb_device_descriptor flash_device_desc = {
99 .bLength = sizeof(flash_device_desc),
100 .bDescriptorType = USB_DT_DEVICE,
101
102 .bcdUSB = __constant_cpu_to_le16(0x0200),
103
104 .bDeviceClass = 0,
105 .bDeviceSubClass = 0,
106 .bDeviceProtocol = 0,
107
108 .idVendor = __constant_cpu_to_le16(0x1234),
109 .idProduct = __constant_cpu_to_le16(0x5678),
110 .iManufacturer = STRINGID_MANUFACTURER,
111 .iProduct = STRINGID_PRODUCT,
112 .iSerialNumber = STRINGID_SERIAL,
113 .bNumConfigurations = 1,
114};
115
116static struct usb_config_descriptor flash_config0 = {
117 .bLength = sizeof(flash_config0),
118 .bDescriptorType = USB_DT_CONFIG,
119
120
121 .bNumInterfaces = 1,
122 .bConfigurationValue = 0,
123 .iConfiguration = 0,
124 .bmAttributes = 1 << 7,
125 .bMaxPower = 50,
126};
127
128static struct usb_interface_descriptor flash_interface0 = {
129 .bLength = sizeof(flash_interface0),
130 .bDescriptorType = USB_DT_INTERFACE,
131
132 .bInterfaceNumber = 0,
133 .bAlternateSetting = 0,
134 .bNumEndpoints = 2,
135 .bInterfaceClass = USB_CLASS_MASS_STORAGE,
136 .bInterfaceSubClass = US_SC_UFI,
137 .bInterfaceProtocol = US_PR_BULK,
138 .iInterface = 0,
139};
140
141static struct usb_endpoint_descriptor flash_endpoint0_out = {
142 .bLength = USB_DT_ENDPOINT_SIZE,
143 .bDescriptorType = USB_DT_ENDPOINT,
144
145 .bEndpointAddress = SANDBOX_FLASH_EP_OUT,
146 .bmAttributes = USB_ENDPOINT_XFER_BULK,
147 .wMaxPacketSize = __constant_cpu_to_le16(1024),
148 .bInterval = 0,
149};
150
151static struct usb_endpoint_descriptor flash_endpoint1_in = {
152 .bLength = USB_DT_ENDPOINT_SIZE,
153 .bDescriptorType = USB_DT_ENDPOINT,
154
155 .bEndpointAddress = SANDBOX_FLASH_EP_IN | USB_ENDPOINT_DIR_MASK,
156 .bmAttributes = USB_ENDPOINT_XFER_BULK,
157 .wMaxPacketSize = __constant_cpu_to_le16(1024),
158 .bInterval = 0,
159};
160
161static void *flash_desc_list[] = {
162 &flash_device_desc,
163 &flash_config0,
164 &flash_interface0,
165 &flash_endpoint0_out,
166 &flash_endpoint1_in,
167 NULL,
168};
169
170static int sandbox_flash_control(struct udevice *dev, struct usb_device *udev,
171 unsigned long pipe, void *buff, int len,
172 struct devrequest *setup)
173{
174 struct sandbox_flash_priv *priv = dev_get_priv(dev);
175
176 if (pipe == usb_rcvctrlpipe(udev, 0)) {
177 switch (setup->request) {
178 case US_BBB_RESET:
179 priv->error = false;
180 return 0;
181 case US_BBB_GET_MAX_LUN:
182 *(char *)buff = '\0';
183 return 1;
184 default:
185 debug("request=%x\n", setup->request);
186 break;
187 }
188 }
189 debug("pipe=%lx\n", pipe);
190
191 return -EIO;
192}
193
194static void setup_fail_response(struct sandbox_flash_priv *priv)
195{
196 struct umass_bbb_csw *csw = &priv->status;
197
198 csw->dCSWSignature = CSWSIGNATURE;
199 csw->dCSWTag = priv->tag;
200 csw->dCSWDataResidue = 0;
201 csw->bCSWStatus = CSWSTATUS_FAILED;
202 priv->buff_used = 0;
203}
204
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209
210
211
212static void setup_response(struct sandbox_flash_priv *priv, void *resp,
213 int size)
214{
215 struct umass_bbb_csw *csw = &priv->status;
216
217 csw->dCSWSignature = CSWSIGNATURE;
218 csw->dCSWTag = priv->tag;
219 csw->dCSWDataResidue = 0;
220 csw->bCSWStatus = CSWSTATUS_GOOD;
221
222 assert(!resp || resp == priv->buff);
223 priv->buff_used = size;
224}
225
226static void handle_read(struct sandbox_flash_priv *priv, ulong lba,
227 ulong transfer_len)
228{
229 debug("%s: lba=%lx, transfer_len=%lx\n", __func__, lba, transfer_len);
230 if (priv->fd != -1) {
231 os_lseek(priv->fd, lba * SANDBOX_FLASH_BLOCK_LEN, OS_SEEK_SET);
232 priv->read_len = transfer_len;
233 setup_response(priv, priv->buff,
234 transfer_len * SANDBOX_FLASH_BLOCK_LEN);
235 } else {
236 setup_fail_response(priv);
237 }
238}
239
240static int handle_ufi_command(struct sandbox_flash_plat *plat,
241 struct sandbox_flash_priv *priv, const void *buff,
242 int len)
243{
244 const struct scsi_cmd *req = buff;
245
246 switch (*req->cmd) {
247 case SCSI_INQUIRY: {
248 struct scsi_inquiry_resp *resp = (void *)priv->buff;
249
250 priv->alloc_len = req->cmd[4];
251 memset(resp, '\0', sizeof(*resp));
252 resp->data_format = 1;
253 resp->additional_len = 0x1f;
254 strncpy(resp->vendor,
255 plat->flash_strings[STRINGID_MANUFACTURER - 1].s,
256 sizeof(resp->vendor));
257 strncpy(resp->product,
258 plat->flash_strings[STRINGID_PRODUCT - 1].s,
259 sizeof(resp->product));
260 strncpy(resp->revision, "1.0", sizeof(resp->revision));
261 setup_response(priv, resp, sizeof(*resp));
262 break;
263 }
264 case SCSI_TST_U_RDY:
265 setup_response(priv, NULL, 0);
266 break;
267 case SCSI_RD_CAPAC: {
268 struct scsi_read_capacity_resp *resp = (void *)priv->buff;
269 uint blocks;
270
271 if (priv->file_size)
272 blocks = priv->file_size / SANDBOX_FLASH_BLOCK_LEN - 1;
273 else
274 blocks = 0;
275 resp->last_block_addr = cpu_to_be32(blocks);
276 resp->block_len = cpu_to_be32(SANDBOX_FLASH_BLOCK_LEN);
277 setup_response(priv, resp, sizeof(*resp));
278 break;
279 }
280 case SCSI_READ10: {
281 struct scsi_read10_req *req = (void *)buff;
282
283 handle_read(priv, be32_to_cpu(req->lba),
284 be16_to_cpu(req->transfer_len));
285 break;
286 }
287 default:
288 debug("Command not supported: %x\n", req->cmd[0]);
289 return -EPROTONOSUPPORT;
290 }
291
292 priv->phase = priv->transfer_len ? PHASE_DATA : PHASE_STATUS;
293 return 0;
294}
295
296static int sandbox_flash_bulk(struct udevice *dev, struct usb_device *udev,
297 unsigned long pipe, void *buff, int len)
298{
299 struct sandbox_flash_plat *plat = dev_get_platdata(dev);
300 struct sandbox_flash_priv *priv = dev_get_priv(dev);
301 int ep = usb_pipeendpoint(pipe);
302 struct umass_bbb_cbw *cbw = buff;
303
304 debug("%s: dev=%s, pipe=%lx, ep=%x, len=%x, phase=%d\n", __func__,
305 dev->name, pipe, ep, len, priv->phase);
306 switch (ep) {
307 case SANDBOX_FLASH_EP_OUT:
308 switch (priv->phase) {
309 case PHASE_START:
310 priv->alloc_len = 0;
311 priv->read_len = 0;
312 if (priv->error || len != UMASS_BBB_CBW_SIZE ||
313 cbw->dCBWSignature != CBWSIGNATURE)
314 goto err;
315 if ((cbw->bCBWFlags & CBWFLAGS_SBZ) ||
316 cbw->bCBWLUN != 0)
317 goto err;
318 if (cbw->bCDBLength < 1 || cbw->bCDBLength >= 0x10)
319 goto err;
320 priv->transfer_len = cbw->dCBWDataTransferLength;
321 priv->tag = cbw->dCBWTag;
322 return handle_ufi_command(plat, priv, cbw->CBWCDB,
323 cbw->bCDBLength);
324 case PHASE_DATA:
325 debug("data out\n");
326 break;
327 default:
328 break;
329 }
330 case SANDBOX_FLASH_EP_IN:
331 switch (priv->phase) {
332 case PHASE_DATA:
333 debug("data in, len=%x, alloc_len=%x, priv->read_len=%x\n",
334 len, priv->alloc_len, priv->read_len);
335 if (priv->read_len) {
336 ulong bytes_read;
337
338 bytes_read = os_read(priv->fd, buff, len);
339 if (bytes_read != len)
340 return -EIO;
341 priv->read_len -= len / SANDBOX_FLASH_BLOCK_LEN;
342 if (!priv->read_len)
343 priv->phase = PHASE_STATUS;
344 } else {
345 if (priv->alloc_len && len > priv->alloc_len)
346 len = priv->alloc_len;
347 memcpy(buff, priv->buff, len);
348 priv->phase = PHASE_STATUS;
349 }
350 return len;
351 case PHASE_STATUS:
352 debug("status in, len=%x\n", len);
353 if (len > sizeof(priv->status))
354 len = sizeof(priv->status);
355 memcpy(buff, &priv->status, len);
356 priv->phase = PHASE_START;
357 return len;
358 default:
359 break;
360 }
361 }
362err:
363 priv->error = true;
364 debug("%s: Detected transfer error\n", __func__);
365 return 0;
366}
367
368static int sandbox_flash_ofdata_to_platdata(struct udevice *dev)
369{
370 struct sandbox_flash_plat *plat = dev_get_platdata(dev);
371
372 plat->pathname = dev_read_string(dev, "sandbox,filepath");
373
374 return 0;
375}
376
377static int sandbox_flash_bind(struct udevice *dev)
378{
379 struct sandbox_flash_plat *plat = dev_get_platdata(dev);
380 struct usb_string *fs;
381
382 fs = plat->flash_strings;
383 fs[0].id = STRINGID_MANUFACTURER;
384 fs[0].s = "sandbox";
385 fs[1].id = STRINGID_PRODUCT;
386 fs[1].s = "flash";
387 fs[2].id = STRINGID_SERIAL;
388 fs[2].s = dev->name;
389
390 return usb_emul_setup_device(dev, plat->flash_strings, flash_desc_list);
391}
392
393static int sandbox_flash_probe(struct udevice *dev)
394{
395 struct sandbox_flash_plat *plat = dev_get_platdata(dev);
396 struct sandbox_flash_priv *priv = dev_get_priv(dev);
397
398 priv->fd = os_open(plat->pathname, OS_O_RDONLY);
399 if (priv->fd != -1)
400 return os_get_filesize(plat->pathname, &priv->file_size);
401
402 return 0;
403}
404
405static const struct dm_usb_ops sandbox_usb_flash_ops = {
406 .control = sandbox_flash_control,
407 .bulk = sandbox_flash_bulk,
408};
409
410static const struct udevice_id sandbox_usb_flash_ids[] = {
411 { .compatible = "sandbox,usb-flash" },
412 { }
413};
414
415U_BOOT_DRIVER(usb_sandbox_flash) = {
416 .name = "usb_sandbox_flash",
417 .id = UCLASS_USB_EMUL,
418 .of_match = sandbox_usb_flash_ids,
419 .bind = sandbox_flash_bind,
420 .probe = sandbox_flash_probe,
421 .ofdata_to_platdata = sandbox_flash_ofdata_to_platdata,
422 .ops = &sandbox_usb_flash_ops,
423 .priv_auto_alloc_size = sizeof(struct sandbox_flash_priv),
424 .platdata_auto_alloc_size = sizeof(struct sandbox_flash_plat),
425};
426
