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8#include <common.h>
9#include <dm.h>
10#include <os.h>
11#include <scsi.h>
12#include <usb.h>
13
14DECLARE_GLOBAL_DATA_PTR;
15
16
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20
21
22enum {
23 SANDBOX_FLASH_EP_OUT = 1,
24 SANDBOX_FLASH_EP_IN = 2,
25 SANDBOX_FLASH_BLOCK_LEN = 512,
26};
27
28enum cmd_phase {
29 PHASE_START,
30 PHASE_DATA,
31 PHASE_STATUS,
32};
33
34enum {
35 STRINGID_MANUFACTURER = 1,
36 STRINGID_PRODUCT,
37 STRINGID_SERIAL,
38
39 STRINGID_COUNT,
40};
41
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55
56struct sandbox_flash_priv {
57 bool error;
58 int alloc_len;
59 int transfer_len;
60 int read_len;
61 enum cmd_phase phase;
62 u32 tag;
63 int fd;
64 loff_t file_size;
65 struct umass_bbb_csw status;
66 int buff_used;
67 u8 buff[512];
68};
69
70struct sandbox_flash_plat {
71 const char *pathname;
72 struct usb_string flash_strings[STRINGID_COUNT];
73};
74
75struct scsi_inquiry_resp {
76 u8 type;
77 u8 flags;
78 u8 version;
79 u8 data_format;
80 u8 additional_len;
81 u8 spare[3];
82 char vendor[8];
83 char product[16];
84 char revision[4];
85};
86
87struct scsi_read_capacity_resp {
88 u32 last_block_addr;
89 u32 block_len;
90};
91
92struct __packed scsi_read10_req {
93 u8 cmd;
94 u8 lun_flags;
95 u32 lba;
96 u8 spare;
97 u16 transfer_len;
98 u8 spare2[3];
99};
100
101static struct usb_device_descriptor flash_device_desc = {
102 .bLength = sizeof(flash_device_desc),
103 .bDescriptorType = USB_DT_DEVICE,
104
105 .bcdUSB = __constant_cpu_to_le16(0x0200),
106
107 .bDeviceClass = 0,
108 .bDeviceSubClass = 0,
109 .bDeviceProtocol = 0,
110
111 .idVendor = __constant_cpu_to_le16(0x1234),
112 .idProduct = __constant_cpu_to_le16(0x5678),
113 .iManufacturer = STRINGID_MANUFACTURER,
114 .iProduct = STRINGID_PRODUCT,
115 .iSerialNumber = STRINGID_SERIAL,
116 .bNumConfigurations = 1,
117};
118
119static struct usb_config_descriptor flash_config0 = {
120 .bLength = sizeof(flash_config0),
121 .bDescriptorType = USB_DT_CONFIG,
122
123
124 .bNumInterfaces = 1,
125 .bConfigurationValue = 0,
126 .iConfiguration = 0,
127 .bmAttributes = 1 << 7,
128 .bMaxPower = 50,
129};
130
131static struct usb_interface_descriptor flash_interface0 = {
132 .bLength = sizeof(flash_interface0),
133 .bDescriptorType = USB_DT_INTERFACE,
134
135 .bInterfaceNumber = 0,
136 .bAlternateSetting = 0,
137 .bNumEndpoints = 2,
138 .bInterfaceClass = USB_CLASS_MASS_STORAGE,
139 .bInterfaceSubClass = US_SC_UFI,
140 .bInterfaceProtocol = US_PR_BULK,
141 .iInterface = 0,
142};
143
144static struct usb_endpoint_descriptor flash_endpoint0_out = {
145 .bLength = USB_DT_ENDPOINT_SIZE,
146 .bDescriptorType = USB_DT_ENDPOINT,
147
148 .bEndpointAddress = SANDBOX_FLASH_EP_OUT,
149 .bmAttributes = USB_ENDPOINT_XFER_BULK,
150 .wMaxPacketSize = __constant_cpu_to_le16(1024),
151 .bInterval = 0,
152};
153
154static struct usb_endpoint_descriptor flash_endpoint1_in = {
155 .bLength = USB_DT_ENDPOINT_SIZE,
156 .bDescriptorType = USB_DT_ENDPOINT,
157
158 .bEndpointAddress = SANDBOX_FLASH_EP_IN | USB_ENDPOINT_DIR_MASK,
159 .bmAttributes = USB_ENDPOINT_XFER_BULK,
160 .wMaxPacketSize = __constant_cpu_to_le16(1024),
161 .bInterval = 0,
162};
163
164static void *flash_desc_list[] = {
165 &flash_device_desc,
166 &flash_config0,
167 &flash_interface0,
168 &flash_endpoint0_out,
169 &flash_endpoint1_in,
170 NULL,
171};
172
173static int sandbox_flash_control(struct udevice *dev, struct usb_device *udev,
174 unsigned long pipe, void *buff, int len,
175 struct devrequest *setup)
176{
177 struct sandbox_flash_priv *priv = dev_get_priv(dev);
178
179 if (pipe == usb_rcvctrlpipe(udev, 0)) {
180 switch (setup->request) {
181 case US_BBB_RESET:
182 priv->error = false;
183 return 0;
184 case US_BBB_GET_MAX_LUN:
185 *(char *)buff = '\0';
186 return 1;
187 default:
188 debug("request=%x\n", setup->request);
189 break;
190 }
191 }
192 debug("pipe=%lx\n", pipe);
193
194 return -EIO;
195}
196
197static void setup_fail_response(struct sandbox_flash_priv *priv)
198{
199 struct umass_bbb_csw *csw = &priv->status;
200
201 csw->dCSWSignature = CSWSIGNATURE;
202 csw->dCSWTag = priv->tag;
203 csw->dCSWDataResidue = 0;
204 csw->bCSWStatus = CSWSTATUS_FAILED;
205 priv->buff_used = 0;
206}
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212
213
214
215static void setup_response(struct sandbox_flash_priv *priv, void *resp,
216 int size)
217{
218 struct umass_bbb_csw *csw = &priv->status;
219
220 csw->dCSWSignature = CSWSIGNATURE;
221 csw->dCSWTag = priv->tag;
222 csw->dCSWDataResidue = 0;
223 csw->bCSWStatus = CSWSTATUS_GOOD;
224
225 assert(!resp || resp == priv->buff);
226 priv->buff_used = size;
227}
228
229static void handle_read(struct sandbox_flash_priv *priv, ulong lba,
230 ulong transfer_len)
231{
232 debug("%s: lba=%lx, transfer_len=%lx\n", __func__, lba, transfer_len);
233 if (priv->fd != -1) {
234 os_lseek(priv->fd, lba * SANDBOX_FLASH_BLOCK_LEN, OS_SEEK_SET);
235 priv->read_len = transfer_len;
236 setup_response(priv, priv->buff,
237 transfer_len * SANDBOX_FLASH_BLOCK_LEN);
238 } else {
239 setup_fail_response(priv);
240 }
241}
242
243static int handle_ufi_command(struct sandbox_flash_plat *plat,
244 struct sandbox_flash_priv *priv, const void *buff,
245 int len)
246{
247 const struct scsi_cmd *req = buff;
248
249 switch (*req->cmd) {
250 case SCSI_INQUIRY: {
251 struct scsi_inquiry_resp *resp = (void *)priv->buff;
252
253 priv->alloc_len = req->cmd[4];
254 memset(resp, '\0', sizeof(*resp));
255 resp->data_format = 1;
256 resp->additional_len = 0x1f;
257 strncpy(resp->vendor,
258 plat->flash_strings[STRINGID_MANUFACTURER - 1].s,
259 sizeof(resp->vendor));
260 strncpy(resp->product,
261 plat->flash_strings[STRINGID_PRODUCT - 1].s,
262 sizeof(resp->product));
263 strncpy(resp->revision, "1.0", sizeof(resp->revision));
264 setup_response(priv, resp, sizeof(*resp));
265 break;
266 }
267 case SCSI_TST_U_RDY:
268 setup_response(priv, NULL, 0);
269 break;
270 case SCSI_RD_CAPAC: {
271 struct scsi_read_capacity_resp *resp = (void *)priv->buff;
272 uint blocks;
273
274 if (priv->file_size)
275 blocks = priv->file_size / SANDBOX_FLASH_BLOCK_LEN - 1;
276 else
277 blocks = 0;
278 resp->last_block_addr = cpu_to_be32(blocks);
279 resp->block_len = cpu_to_be32(SANDBOX_FLASH_BLOCK_LEN);
280 setup_response(priv, resp, sizeof(*resp));
281 break;
282 }
283 case SCSI_READ10: {
284 struct scsi_read10_req *req = (void *)buff;
285
286 handle_read(priv, be32_to_cpu(req->lba),
287 be16_to_cpu(req->transfer_len));
288 break;
289 }
290 default:
291 debug("Command not supported: %x\n", req->cmd[0]);
292 return -EPROTONOSUPPORT;
293 }
294
295 priv->phase = priv->transfer_len ? PHASE_DATA : PHASE_STATUS;
296 return 0;
297}
298
299static int sandbox_flash_bulk(struct udevice *dev, struct usb_device *udev,
300 unsigned long pipe, void *buff, int len)
301{
302 struct sandbox_flash_plat *plat = dev_get_platdata(dev);
303 struct sandbox_flash_priv *priv = dev_get_priv(dev);
304 int ep = usb_pipeendpoint(pipe);
305 struct umass_bbb_cbw *cbw = buff;
306
307 debug("%s: dev=%s, pipe=%lx, ep=%x, len=%x, phase=%d\n", __func__,
308 dev->name, pipe, ep, len, priv->phase);
309 switch (ep) {
310 case SANDBOX_FLASH_EP_OUT:
311 switch (priv->phase) {
312 case PHASE_START:
313 priv->alloc_len = 0;
314 priv->read_len = 0;
315 if (priv->error || len != UMASS_BBB_CBW_SIZE ||
316 cbw->dCBWSignature != CBWSIGNATURE)
317 goto err;
318 if ((cbw->bCBWFlags & CBWFLAGS_SBZ) ||
319 cbw->bCBWLUN != 0)
320 goto err;
321 if (cbw->bCDBLength < 1 || cbw->bCDBLength >= 0x10)
322 goto err;
323 priv->transfer_len = cbw->dCBWDataTransferLength;
324 priv->tag = cbw->dCBWTag;
325 return handle_ufi_command(plat, priv, cbw->CBWCDB,
326 cbw->bCDBLength);
327 case PHASE_DATA:
328 debug("data out\n");
329 break;
330 default:
331 break;
332 }
333 case SANDBOX_FLASH_EP_IN:
334 switch (priv->phase) {
335 case PHASE_DATA:
336 debug("data in, len=%x, alloc_len=%x, priv->read_len=%x\n",
337 len, priv->alloc_len, priv->read_len);
338 if (priv->read_len) {
339 ulong bytes_read;
340
341 bytes_read = os_read(priv->fd, buff, len);
342 if (bytes_read != len)
343 return -EIO;
344 priv->read_len -= len / SANDBOX_FLASH_BLOCK_LEN;
345 if (!priv->read_len)
346 priv->phase = PHASE_STATUS;
347 } else {
348 if (priv->alloc_len && len > priv->alloc_len)
349 len = priv->alloc_len;
350 memcpy(buff, priv->buff, len);
351 priv->phase = PHASE_STATUS;
352 }
353 return len;
354 case PHASE_STATUS:
355 debug("status in, len=%x\n", len);
356 if (len > sizeof(priv->status))
357 len = sizeof(priv->status);
358 memcpy(buff, &priv->status, len);
359 priv->phase = PHASE_START;
360 return len;
361 default:
362 break;
363 }
364 }
365err:
366 priv->error = true;
367 debug("%s: Detected transfer error\n", __func__);
368 return 0;
369}
370
371static int sandbox_flash_ofdata_to_platdata(struct udevice *dev)
372{
373 struct sandbox_flash_plat *plat = dev_get_platdata(dev);
374
375 plat->pathname = dev_read_string(dev, "sandbox,filepath");
376
377 return 0;
378}
379
380static int sandbox_flash_bind(struct udevice *dev)
381{
382 struct sandbox_flash_plat *plat = dev_get_platdata(dev);
383 struct usb_string *fs;
384
385 fs = plat->flash_strings;
386 fs[0].id = STRINGID_MANUFACTURER;
387 fs[0].s = "sandbox";
388 fs[1].id = STRINGID_PRODUCT;
389 fs[1].s = "flash";
390 fs[2].id = STRINGID_SERIAL;
391 fs[2].s = dev->name;
392
393 return usb_emul_setup_device(dev, plat->flash_strings, flash_desc_list);
394}
395
396static int sandbox_flash_probe(struct udevice *dev)
397{
398 struct sandbox_flash_plat *plat = dev_get_platdata(dev);
399 struct sandbox_flash_priv *priv = dev_get_priv(dev);
400
401 priv->fd = os_open(plat->pathname, OS_O_RDONLY);
402 if (priv->fd != -1)
403 return os_get_filesize(plat->pathname, &priv->file_size);
404
405 return 0;
406}
407
408static const struct dm_usb_ops sandbox_usb_flash_ops = {
409 .control = sandbox_flash_control,
410 .bulk = sandbox_flash_bulk,
411};
412
413static const struct udevice_id sandbox_usb_flash_ids[] = {
414 { .compatible = "sandbox,usb-flash" },
415 { }
416};
417
418U_BOOT_DRIVER(usb_sandbox_flash) = {
419 .name = "usb_sandbox_flash",
420 .id = UCLASS_USB_EMUL,
421 .of_match = sandbox_usb_flash_ids,
422 .bind = sandbox_flash_bind,
423 .probe = sandbox_flash_probe,
424 .ofdata_to_platdata = sandbox_flash_ofdata_to_platdata,
425 .ops = &sandbox_usb_flash_ops,
426 .priv_auto_alloc_size = sizeof(struct sandbox_flash_priv),
427 .platdata_auto_alloc_size = sizeof(struct sandbox_flash_plat),
428};
429
