* access is always read-only.) The gadget will indicate that it has
* removable media if the optional "removable" module parameter is set.
*
- * The gadget supports the Control-Bulk (CB), Control-Bulk-Interrupt (CBI),
- * and Bulk-Only (also known as Bulk-Bulk-Bulk or BBB) transports, selected
- * by the optional "transport" module parameter. It also supports the
- * following protocols: RBC (0x01), ATAPI or SFF-8020i (0x02), QIC-157 (0c03),
- * UFI (0x04), SFF-8070i (0x05), and transparent SCSI (0x06), selected by
- * the optional "protocol" module parameter. In addition, the default
- * Vendor ID, Product ID, and release number can be overridden.
- *
* There is support for multiple logical units (LUNs), each of which has
* its own backing file. The number of LUNs can be set using the optional
* "luns" module parameter (anywhere from 1 to 8), and the corresponding
* bulk endpoints
* cdrom Default false, boolean for whether to emulate
* a CD-ROM drive
- * transport=XXX Default BBB, transport name (CB, CBI, or BBB)
- * protocol=YYY Default SCSI, protocol name (RBC, 8020 or
- * ATAPI, QIC, UFI, 8070, or SCSI;
- * also 1 - 6)
- * vendor=0xVVVV Default 0x0525 (NetChip), USB Vendor ID
- * product=0xPPPP Default 0xa4a5 (FSG), USB Product ID
- * release=0xRRRR Override the USB release number (bcdDevice)
- * buflen=N Default N=16384, buffer size used (will be
- * rounded down to a multiple of
- * PAGE_CACHE_SIZE)
- *
- * If CONFIG_USB_FILE_STORAGE_TEST is not set, only the "file", "ro",
- * "removable", "luns", "stall", and "cdrom" options are available; default
- * values are used for everything else.
*
* The pathnames of the backing files and the ro settings are available in
* the attribute files "file" and "ro" in the lun<n> subdirectory of the
static const char fsg_string_interface[] = "Mass Storage";
+#define FSG_NO_INTR_EP 1
+
#include "storage_common.c"
int can_stall;
int cdrom;
- char *transport_parm;
- char *protocol_parm;
- unsigned short vendor;
- unsigned short product;
unsigned short release;
- unsigned int buflen;
-
- int transport_type;
- char *transport_name;
- int protocol_type;
- char *protocol_name;
-
} mod_data = { // Default values
- .transport_parm = "BBB",
- .protocol_parm = "SCSI",
.removable = 0,
.can_stall = 1,
.cdrom = 0,
- .vendor = FSG_VENDOR_ID,
- .product = FSG_PRODUCT_ID,
- .release = 0xffff, // Use controller chip type
- .buflen = 16384,
};
MODULE_PARM_DESC(cdrom, "true to emulate cdrom instead of disk");
-/* In the non-TEST version, only the module parameters listed above
- * are available. */
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
-
-module_param_named(transport, mod_data.transport_parm, charp, S_IRUGO);
-MODULE_PARM_DESC(transport, "type of transport (BBB, CBI, or CB)");
-
-module_param_named(protocol, mod_data.protocol_parm, charp, S_IRUGO);
-MODULE_PARM_DESC(protocol, "type of protocol (RBC, 8020, QIC, UFI, "
- "8070, or SCSI)");
-
-module_param_named(vendor, mod_data.vendor, ushort, S_IRUGO);
-MODULE_PARM_DESC(vendor, "USB Vendor ID");
-
-module_param_named(product, mod_data.product, ushort, S_IRUGO);
-MODULE_PARM_DESC(product, "USB Product ID");
-
-module_param_named(release, mod_data.release, ushort, S_IRUGO);
-MODULE_PARM_DESC(release, "USB release number");
-
-module_param_named(buflen, mod_data.buflen, uint, S_IRUGO);
-MODULE_PARM_DESC(buflen, "I/O buffer size");
-
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
-
-
-/*
- * These definitions will permit the compiler to avoid generating code for
- * parts of the driver that aren't used in the non-TEST version. Even gcc
- * can recognize when a test of a constant expression yields a dead code
- * path.
- */
-
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
-
-#define transport_is_bbb() (mod_data.transport_type == USB_PR_BULK)
-#define transport_is_cbi() (mod_data.transport_type == USB_PR_CBI)
-#define protocol_is_scsi() (mod_data.protocol_type == USB_SC_SCSI)
-
-#else
-
-#define transport_is_bbb() 1
-#define transport_is_cbi() 0
-#define protocol_is_scsi() 1
-
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
-
-
/*-------------------------------------------------------------------------*/
unsigned int ep0_req_tag;
const char *ep0req_name;
- struct usb_request *intreq; // For interrupt responses
- int intreq_busy;
- struct fsg_buffhd *intr_buffhd;
-
unsigned int bulk_out_maxpacket;
enum fsg_state state; // For exception handling
unsigned int exception_req_tag;
unsigned int running : 1;
unsigned int bulk_in_enabled : 1;
unsigned int bulk_out_enabled : 1;
- unsigned int intr_in_enabled : 1;
unsigned int phase_error : 1;
unsigned int short_packet_received : 1;
unsigned int bad_lun_okay : 1;
unsigned long atomic_bitflags;
#define REGISTERED 0
#define IGNORE_BULK_OUT 1
-#define SUSPENDED 2
struct usb_ep *bulk_in;
struct usb_ep *bulk_out;
- struct usb_ep *intr_in;
struct fsg_buffhd *next_buffhd_to_fill;
struct fsg_buffhd *next_buffhd_to_drain;
u32 residue;
u32 usb_amount_left;
- /* The CB protocol offers no way for a host to know when a command
- * has completed. As a result the next command may arrive early,
- * and we will still have to handle it. For that reason we need
- * a buffer to store new commands when using CB (or CBI, which
- * does not oblige a host to wait for command completion either). */
- int cbbuf_cmnd_size;
- u8 cbbuf_cmnd[MAX_COMMAND_SIZE];
-
unsigned int nluns;
struct fsg_lun *luns;
struct fsg_lun *curlun;
}
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
-static void intr_in_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct fsg_dev *fsg = ep->driver_data;
- struct fsg_buffhd *bh = req->context;
-
- if (req->status || req->actual != req->length)
- DBG(fsg, "%s --> %d, %u/%u\n", __func__,
- req->status, req->actual, req->length);
- if (req->status == -ECONNRESET) // Request was cancelled
- usb_ep_fifo_flush(ep);
-
- /* Hold the lock while we update the request and buffer states */
- smp_wmb();
- spin_lock(&fsg->lock);
- fsg->intreq_busy = 0;
- bh->state = BUF_STATE_EMPTY;
- wakeup_thread(fsg);
- spin_unlock(&fsg->lock);
-}
-
-#else
-static void intr_in_complete(struct usb_ep *ep, struct usb_request *req)
-{}
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
-
-
/*-------------------------------------------------------------------------*/
/* Ep0 class-specific handlers. These always run in_irq. */
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
-static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-{
- struct usb_request *req = fsg->ep0req;
- static u8 cbi_reset_cmnd[6] = {
- SC_SEND_DIAGNOSTIC, 4, 0xff, 0xff, 0xff, 0xff};
-
- /* Error in command transfer? */
- if (req->status || req->length != req->actual ||
- req->actual < 6 || req->actual > MAX_COMMAND_SIZE) {
-
- /* Not all controllers allow a protocol stall after
- * receiving control-out data, but we'll try anyway. */
- fsg_set_halt(fsg, fsg->ep0);
- return; // Wait for reset
- }
-
- /* Is it the special reset command? */
- if (req->actual >= sizeof cbi_reset_cmnd &&
- memcmp(req->buf, cbi_reset_cmnd,
- sizeof cbi_reset_cmnd) == 0) {
-
- /* Raise an exception to stop the current operation
- * and reinitialize our state. */
- DBG(fsg, "cbi reset request\n");
- raise_exception(fsg, FSG_STATE_RESET);
- return;
- }
-
- VDBG(fsg, "CB[I] accept device-specific command\n");
- spin_lock(&fsg->lock);
-
- /* Save the command for later */
- if (fsg->cbbuf_cmnd_size)
- WARNING(fsg, "CB[I] overwriting previous command\n");
- fsg->cbbuf_cmnd_size = req->actual;
- memcpy(fsg->cbbuf_cmnd, req->buf, fsg->cbbuf_cmnd_size);
-
- wakeup_thread(fsg);
- spin_unlock(&fsg->lock);
-}
-
-#else
-static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-{}
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
-
-
static int class_setup_req(struct fsg_dev *fsg,
const struct usb_ctrlrequest *ctrl)
{
struct usb_request *req = fsg->ep0req;
- int value = -EOPNOTSUPP;
u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
u16 w_length = le16_to_cpu(ctrl->wLength);
if (!fsg->config)
- return value;
+ return -EOPNOTSUPP;
- /* Handle Bulk-only class-specific requests */
- if (transport_is_bbb()) {
- switch (ctrl->bRequest) {
-
- case USB_BULK_RESET_REQUEST:
- if (ctrl->bRequestType != (USB_DIR_OUT |
- USB_TYPE_CLASS | USB_RECIP_INTERFACE))
- break;
- if (w_index != 0 || w_value != 0) {
- value = -EDOM;
- break;
- }
-
- /* Raise an exception to stop the current operation
- * and reinitialize our state. */
- DBG(fsg, "bulk reset request\n");
- raise_exception(fsg, FSG_STATE_RESET);
- value = DELAYED_STATUS;
- break;
+ switch (ctrl->bRequest) {
- case USB_BULK_GET_MAX_LUN_REQUEST:
- if (ctrl->bRequestType != (USB_DIR_IN |
- USB_TYPE_CLASS | USB_RECIP_INTERFACE))
- break;
- if (w_index != 0 || w_value != 0) {
- value = -EDOM;
- break;
- }
- VDBG(fsg, "get max LUN\n");
- *(u8 *) req->buf = fsg->nluns - 1;
- value = 1;
+ case USB_BULK_RESET_REQUEST:
+ if (ctrl->bRequestType !=
+ (USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
break;
- }
- }
+ if (w_index != 0 || w_value != 0)
+ return -EDOM;
- /* Handle CBI class-specific requests */
- else {
- switch (ctrl->bRequest) {
+ /* Raise an exception to stop the current operation
+ * and reinitialize our state. */
+ DBG(fsg, "bulk reset request\n");
+ raise_exception(fsg, FSG_STATE_RESET);
+ return DELAYED_STATUS;
- case USB_CBI_ADSC_REQUEST:
- if (ctrl->bRequestType != (USB_DIR_OUT |
- USB_TYPE_CLASS | USB_RECIP_INTERFACE))
- break;
- if (w_index != 0 || w_value != 0) {
- value = -EDOM;
- break;
- }
- if (w_length > MAX_COMMAND_SIZE) {
- value = -EOVERFLOW;
- break;
- }
- value = w_length;
- fsg->ep0req->context = received_cbi_adsc;
+ case USB_BULK_GET_MAX_LUN_REQUEST:
+ if (ctrl->bRequestType !=
+ (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
break;
- }
- }
-
- if (value == -EOPNOTSUPP)
- VDBG(fsg,
- "unknown class-specific control req "
- "%02x.%02x v%04x i%04x l%u\n",
- ctrl->bRequestType, ctrl->bRequest,
- le16_to_cpu(ctrl->wValue), w_index, w_length);
- return value;
+ if (w_index != 0 || w_value != 0)
+ return -EDOM;
+ VDBG(fsg, "get max LUN\n");
+ *(u8 *) req->buf = fsg->nluns - 1;
+ return 1;
+ }
+
+ VDBG(fsg,
+ "unknown class-specific control req "
+ "%02x.%02x v%04x i%04x l%u\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ le16_to_cpu(ctrl->wValue), w_index, w_length);
+ return -EOPNOTSUPP;
}
if (ep == fsg->bulk_in)
dump_msg(fsg, "bulk-in", req->buf, req->length);
- else if (ep == fsg->intr_in)
- dump_msg(fsg, "intr-in", req->buf, req->length);
spin_lock_irq(&fsg->lock);
*pbusy = 1;
* the next page.
* If this means reading 0 then we were asked to read past
* the end of file. */
- amount = min((unsigned int) amount_left, mod_data.buflen);
+ amount = min(amount_left, FSG_BUFLEN);
amount = min((loff_t) amount,
curlun->file_length - file_offset);
partial_page = file_offset & (PAGE_CACHE_SIZE - 1);
* If this means getting 0, then we were asked
* to write past the end of file.
* Finally, round down to a block boundary. */
- amount = min(amount_left_to_req, mod_data.buflen);
+ amount = min(amount_left_to_req, FSG_BUFLEN);
amount = min((loff_t) amount, curlun->file_length -
usb_offset);
partial_page = usb_offset & (PAGE_CACHE_SIZE - 1);
* And don't try to read past the end of the file.
* If this means reading 0 then we were asked to read
* past the end of file. */
- amount = min((unsigned int) amount_left, mod_data.buflen);
+ amount = min(amount_left, FSG_BUFLEN);
amount = min((loff_t) amount,
curlun->file_length - file_offset);
if (amount == 0) {
} else { // SC_MODE_SENSE_10
buf[3] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA
buf += 8;
- limit = 65535; // Should really be mod_data.buflen
+ limit = 65535; // Should really be FSG_BUFLEN
}
/* No block descriptors */
static int do_start_stop(struct fsg_dev *fsg)
{
- struct fsg_lun *curlun = fsg->curlun;
- int loej, start;
-
if (!mod_data.removable) {
- curlun->sense_data = SS_INVALID_COMMAND;
- return -EINVAL;
- }
-
- // int immed = fsg->cmnd[1] & 0x01;
- loej = fsg->cmnd[4] & 0x02;
- start = fsg->cmnd[4] & 0x01;
-
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
- if ((fsg->cmnd[1] & ~0x01) != 0 || // Mask away Immed
- (fsg->cmnd[4] & ~0x03) != 0) { // Mask LoEj, Start
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ fsg->curlun->sense_data = SS_INVALID_COMMAND;
return -EINVAL;
}
-
- if (!start) {
-
- /* Are we allowed to unload the media? */
- if (curlun->prevent_medium_removal) {
- LDBG(curlun, "unload attempt prevented\n");
- curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED;
- return -EINVAL;
- }
- if (loej) { // Simulate an unload/eject
- up_read(&fsg->filesem);
- down_write(&fsg->filesem);
- fsg_lun_close(curlun);
- up_write(&fsg->filesem);
- down_read(&fsg->filesem);
- }
- } else {
-
- /* Our emulation doesn't support mounting; the medium is
- * available for use as soon as it is loaded. */
- if (!fsg_lun_is_open(curlun)) {
- curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
- return -EINVAL;
- }
- }
-#endif
return 0;
}
return rc;
}
- nsend = min(fsg->usb_amount_left, (u32) mod_data.buflen);
+ nsend = min(fsg->usb_amount_left, FSG_BUFLEN);
memset(bh->buf + nkeep, 0, nsend - nkeep);
bh->inreq->length = nsend;
bh->inreq->zero = 0;
/* Try to submit another request if we need one */
bh = fsg->next_buffhd_to_fill;
if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) {
- amount = min(fsg->usb_amount_left,
- (u32) mod_data.buflen);
+ amount = min(fsg->usb_amount_left, FSG_BUFLEN);
/* amount is always divisible by 512, hence by
* the bulk-out maxpacket size */
/* All but the last buffer of data must have already been sent */
case DATA_DIR_TO_HOST:
- if (fsg->data_size == 0)
- ; // Nothing to send
+ if (fsg->data_size == 0) {
+ /* Nothing to send */
/* If there's no residue, simply send the last buffer */
- else if (fsg->residue == 0) {
+ } else if (fsg->residue == 0) {
bh->inreq->zero = 0;
start_transfer(fsg, fsg->bulk_in, bh->inreq,
&bh->inreq_busy, &bh->state);
fsg->next_buffhd_to_fill = bh->next;
- }
-
- /* There is a residue. For CB and CBI, simply mark the end
- * of the data with a short packet. However, if we are
- * allowed to stall, there was no data at all (residue ==
- * data_size), and the command failed (invalid LUN or
- * sense data is set), then halt the bulk-in endpoint
- * instead. */
- else if (!transport_is_bbb()) {
- if (mod_data.can_stall &&
- fsg->residue == fsg->data_size &&
- (!fsg->curlun || fsg->curlun->sense_data != SS_NO_SENSE)) {
- bh->state = BUF_STATE_EMPTY;
- rc = halt_bulk_in_endpoint(fsg);
- } else {
- bh->inreq->zero = 1;
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
- &bh->inreq_busy, &bh->state);
- fsg->next_buffhd_to_fill = bh->next;
- }
- }
/* For Bulk-only, if we're allowed to stall then send the
* short packet and halt the bulk-in endpoint. If we can't
* stall, pad out the remaining data with 0's. */
- else {
- if (mod_data.can_stall) {
- bh->inreq->zero = 1;
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
- &bh->inreq_busy, &bh->state);
- fsg->next_buffhd_to_fill = bh->next;
- rc = halt_bulk_in_endpoint(fsg);
- } else
- rc = pad_with_zeros(fsg);
+ } else if (mod_data.can_stall) {
+ bh->inreq->zero = 1;
+ start_transfer(fsg, fsg->bulk_in, bh->inreq,
+ &bh->inreq_busy, &bh->state);
+ fsg->next_buffhd_to_fill = bh->next;
+ rc = halt_bulk_in_endpoint(fsg);
+ } else {
+ rc = pad_with_zeros(fsg);
}
break;
{
struct fsg_lun *curlun = fsg->curlun;
struct fsg_buffhd *bh;
+ struct bulk_cs_wrap *csw;
int rc;
u8 status = USB_STATUS_PASS;
u32 sd, sdinfo = 0;
SK(sd), ASC(sd), ASCQ(sd), sdinfo);
}
- if (transport_is_bbb()) {
- struct bulk_cs_wrap *csw = bh->buf;
-
- /* Store and send the Bulk-only CSW */
- csw->Signature = cpu_to_le32(USB_BULK_CS_SIG);
- csw->Tag = fsg->tag;
- csw->Residue = cpu_to_le32(fsg->residue);
- csw->Status = status;
-
- bh->inreq->length = USB_BULK_CS_WRAP_LEN;
- bh->inreq->zero = 0;
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
- &bh->inreq_busy, &bh->state);
-
- } else if (mod_data.transport_type == USB_PR_CB) {
- /* Control-Bulk transport has no status phase! */
- return 0;
+ /* Store and send the Bulk-only CSW */
+ csw = bh->buf;
- } else { // USB_PR_CBI
- struct interrupt_data *buf = bh->buf;
+ csw->Signature = cpu_to_le32(USB_BULK_CS_SIG);
+ csw->Tag = fsg->tag;
+ csw->Residue = cpu_to_le32(fsg->residue);
+ csw->Status = status;
- /* Store and send the Interrupt data. UFI sends the ASC
- * and ASCQ bytes. Everything else sends a Type (which
- * is always 0) and the status Value. */
- if (mod_data.protocol_type == USB_SC_UFI) {
- buf->bType = ASC(sd);
- buf->bValue = ASCQ(sd);
- } else {
- buf->bType = 0;
- buf->bValue = status;
- }
- fsg->intreq->length = CBI_INTERRUPT_DATA_LEN;
-
- fsg->intr_buffhd = bh; // Point to the right buffhd
- fsg->intreq->buf = bh->inreq->buf;
- fsg->intreq->context = bh;
- start_transfer(fsg, fsg->intr_in, fsg->intreq,
- &fsg->intreq_busy, &bh->state);
- }
+ bh->inreq->length = USB_BULK_CS_WRAP_LEN;
+ bh->inreq->zero = 0;
+ start_transfer(fsg, fsg->bulk_in, bh->inreq,
+ &bh->inreq_busy, &bh->state);
fsg->next_buffhd_to_fill = bh->next;
return 0;
char hdlen[20];
struct fsg_lun *curlun;
- /* Adjust the expected cmnd_size for protocol encapsulation padding.
- * Transparent SCSI doesn't pad. */
- if (protocol_is_scsi())
- ;
-
- /* There's some disagreement as to whether RBC pads commands or not.
- * We'll play it safe and accept either form. */
- else if (mod_data.protocol_type == USB_SC_RBC) {
- if (fsg->cmnd_size == 12)
- cmnd_size = 12;
-
- /* All the other protocols pad to 12 bytes */
- } else
- cmnd_size = 12;
-
hdlen[0] = 0;
if (fsg->data_dir != DATA_DIR_UNKNOWN)
sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir],
}
/* Check that the LUN values are consistent */
- if (transport_is_bbb()) {
- if (fsg->lun != lun)
- DBG(fsg, "using LUN %d from CBW, "
- "not LUN %d from CDB\n",
- fsg->lun, lun);
- } else
- fsg->lun = lun; // Use LUN from the command
+ if (fsg->lun != lun)
+ DBG(fsg, "using LUN %d from CBW, not LUN %d from CDB\n",
+ fsg->lun, lun);
/* Check the LUN */
if (fsg->lun >= 0 && fsg->lun < fsg->nluns) {
struct fsg_buffhd *bh;
int rc = 0;
- if (transport_is_bbb()) {
-
- /* Wait for the next buffer to become available */
- bh = fsg->next_buffhd_to_fill;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(fsg);
- if (rc)
- return rc;
- }
-
- /* Queue a request to read a Bulk-only CBW */
- set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN);
- bh->outreq->short_not_ok = 1;
- start_transfer(fsg, fsg->bulk_out, bh->outreq,
- &bh->outreq_busy, &bh->state);
-
- /* We will drain the buffer in software, which means we
- * can reuse it for the next filling. No need to advance
- * next_buffhd_to_fill. */
-
- /* Wait for the CBW to arrive */
- while (bh->state != BUF_STATE_FULL) {
- rc = sleep_thread(fsg);
- if (rc)
- return rc;
- }
- smp_rmb();
- rc = received_cbw(fsg, bh);
- bh->state = BUF_STATE_EMPTY;
-
- } else { // USB_PR_CB or USB_PR_CBI
+ /* Wait for the next buffer to become available */
+ bh = fsg->next_buffhd_to_fill;
+ while (bh->state != BUF_STATE_EMPTY) {
+ rc = sleep_thread(fsg);
+ if (rc)
+ return rc;
+ }
- /* Wait for the next command to arrive */
- while (fsg->cbbuf_cmnd_size == 0) {
- rc = sleep_thread(fsg);
- if (rc)
- return rc;
- }
+ /* Queue a request to read a Bulk-only CBW */
+ set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN);
+ bh->outreq->short_not_ok = 1;
+ start_transfer(fsg, fsg->bulk_out, bh->outreq,
+ &bh->outreq_busy, &bh->state);
- /* Is the previous status interrupt request still busy?
- * The host is allowed to skip reading the status,
- * so we must cancel it. */
- if (fsg->intreq_busy)
- usb_ep_dequeue(fsg->intr_in, fsg->intreq);
+ /* We will drain the buffer in software, which means we
+ * can reuse it for the next filling. No need to advance
+ * next_buffhd_to_fill. */
- /* Copy the command and mark the buffer empty */
- fsg->data_dir = DATA_DIR_UNKNOWN;
- spin_lock_irq(&fsg->lock);
- fsg->cmnd_size = fsg->cbbuf_cmnd_size;
- memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size);
- fsg->cbbuf_cmnd_size = 0;
- spin_unlock_irq(&fsg->lock);
+ /* Wait for the CBW to arrive */
+ while (bh->state != BUF_STATE_FULL) {
+ rc = sleep_thread(fsg);
+ if (rc)
+ return rc;
}
+ smp_rmb();
+ rc = received_cbw(fsg, bh);
+ bh->state = BUF_STATE_EMPTY;
+
return rc;
}
bh->outreq = NULL;
}
}
- if (fsg->intreq) {
- usb_ep_free_request(fsg->intr_in, fsg->intreq);
- fsg->intreq = NULL;
- }
/* Disable the endpoints */
if (fsg->bulk_in_enabled) {
usb_ep_disable(fsg->bulk_out);
fsg->bulk_out_enabled = 0;
}
- if (fsg->intr_in_enabled) {
- usb_ep_disable(fsg->intr_in);
- fsg->intr_in_enabled = 0;
- }
fsg->running = 0;
if (altsetting < 0 || rc != 0)
fsg->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize);
clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
- if (transport_is_cbi()) {
- d = fsg_ep_desc(fsg->gadget,
- &fsg_fs_intr_in_desc, &fsg_hs_intr_in_desc);
- if ((rc = enable_endpoint(fsg, fsg->intr_in, d)) != 0)
- goto reset;
- fsg->intr_in_enabled = 1;
- }
-
/* Allocate the requests */
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
struct fsg_buffhd *bh = &fsg->buffhds[i];
bh->inreq->complete = bulk_in_complete;
bh->outreq->complete = bulk_out_complete;
}
- if (transport_is_cbi()) {
- if ((rc = alloc_request(fsg, fsg->intr_in, &fsg->intreq)) != 0)
- goto reset;
- fsg->intreq->complete = intr_in_complete;
- }
fsg->running = 1;
for (i = 0; i < fsg->nluns; ++i)
}
/* Cancel all the pending transfers */
- if (fsg->intreq_busy)
- usb_ep_dequeue(fsg->intr_in, fsg->intreq);
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
bh = &fsg->buffhds[i];
if (bh->inreq_busy)
/* Wait until everything is idle */
for (;;) {
- num_active = fsg->intreq_busy;
+ num_active = 0;
for (i = 0; i < FSG_NUM_BUFFERS; ++i) {
bh = &fsg->buffhds[i];
num_active += bh->inreq_busy + bh->outreq_busy;
usb_ep_fifo_flush(fsg->bulk_in);
if (fsg->bulk_out_enabled)
usb_ep_fifo_flush(fsg->bulk_out);
- if (fsg->intr_in_enabled)
- usb_ep_fifo_flush(fsg->intr_in);
/* Reset the I/O buffer states and pointers, the SCSI
* state, and the exception. Then invoke the handler. */
if (test_and_clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
usb_ep_clear_halt(fsg->bulk_in);
- if (transport_is_bbb()) {
- if (fsg->ep0_req_tag == exception_req_tag)
- ep0_queue(fsg); // Complete the status stage
-
- } else if (transport_is_cbi())
- send_status(fsg); // Status by interrupt pipe
+ if (fsg->ep0_req_tag == exception_req_tag)
+ ep0_queue(fsg); // Complete the status stage
/* Technically this should go here, but it would only be
* a waste of time. Ditto for the INTERFACE_CHANGE and
static int __init check_parameters(struct fsg_dev *fsg)
{
- int prot;
int gcnum;
- /* Store the default values */
- mod_data.transport_type = USB_PR_BULK;
- mod_data.transport_name = "Bulk-only";
- mod_data.protocol_type = USB_SC_SCSI;
- mod_data.protocol_name = "Transparent SCSI";
-
/* Some peripheral controllers are known not to be able to
* halt bulk endpoints correctly. If one of them is present,
* disable stalls.
}
}
- prot = simple_strtol(mod_data.protocol_parm, NULL, 0);
-
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
- if (strnicmp(mod_data.transport_parm, "BBB", 10) == 0) {
- ; // Use default setting
- } else if (strnicmp(mod_data.transport_parm, "CB", 10) == 0) {
- mod_data.transport_type = USB_PR_CB;
- mod_data.transport_name = "Control-Bulk";
- } else if (strnicmp(mod_data.transport_parm, "CBI", 10) == 0) {
- mod_data.transport_type = USB_PR_CBI;
- mod_data.transport_name = "Control-Bulk-Interrupt";
- } else {
- ERROR(fsg, "invalid transport: %s\n", mod_data.transport_parm);
- return -EINVAL;
- }
-
- if (strnicmp(mod_data.protocol_parm, "SCSI", 10) == 0 ||
- prot == USB_SC_SCSI) {
- ; // Use default setting
- } else if (strnicmp(mod_data.protocol_parm, "RBC", 10) == 0 ||
- prot == USB_SC_RBC) {
- mod_data.protocol_type = USB_SC_RBC;
- mod_data.protocol_name = "RBC";
- } else if (strnicmp(mod_data.protocol_parm, "8020", 4) == 0 ||
- strnicmp(mod_data.protocol_parm, "ATAPI", 10) == 0 ||
- prot == USB_SC_8020) {
- mod_data.protocol_type = USB_SC_8020;
- mod_data.protocol_name = "8020i (ATAPI)";
- } else if (strnicmp(mod_data.protocol_parm, "QIC", 3) == 0 ||
- prot == USB_SC_QIC) {
- mod_data.protocol_type = USB_SC_QIC;
- mod_data.protocol_name = "QIC-157";
- } else if (strnicmp(mod_data.protocol_parm, "UFI", 10) == 0 ||
- prot == USB_SC_UFI) {
- mod_data.protocol_type = USB_SC_UFI;
- mod_data.protocol_name = "UFI";
- } else if (strnicmp(mod_data.protocol_parm, "8070", 4) == 0 ||
- prot == USB_SC_8070) {
- mod_data.protocol_type = USB_SC_8070;
- mod_data.protocol_name = "8070i";
- } else {
- ERROR(fsg, "invalid protocol: %s\n", mod_data.protocol_parm);
- return -EINVAL;
- }
-
- mod_data.buflen &= PAGE_CACHE_MASK;
- if (mod_data.buflen <= 0) {
- ERROR(fsg, "invalid buflen\n");
- return -ETOOSMALL;
- }
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
-
return 0;
}
ep->driver_data = fsg; // claim the endpoint
fsg->bulk_out = ep;
- if (transport_is_cbi()) {
- ep = usb_ep_autoconfig(gadget, &fsg_fs_intr_in_desc);
- if (!ep)
- goto autoconf_fail;
- ep->driver_data = fsg; // claim the endpoint
- fsg->intr_in = ep;
- }
-
/* Fix up the descriptors */
device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket;
- device_desc.idVendor = cpu_to_le16(mod_data.vendor);
- device_desc.idProduct = cpu_to_le16(mod_data.product);
device_desc.bcdDevice = cpu_to_le16(mod_data.release);
- i = (transport_is_cbi() ? 3 : 2); // Number of endpoints
- fsg_intf_desc.bNumEndpoints = i;
- fsg_intf_desc.bInterfaceSubClass = mod_data.protocol_type;
- fsg_intf_desc.bInterfaceProtocol = mod_data.transport_type;
- fsg_fs_function[i + FSG_FS_FUNCTION_PRE_EP_ENTRIES] = NULL;
-
if (gadget_is_dualspeed(gadget)) {
- fsg_hs_function[i + FSG_HS_FUNCTION_PRE_EP_ENTRIES] = NULL;
-
/* Assume ep0 uses the same maxpacket value for both speeds */
dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket;
fsg_fs_bulk_in_desc.bEndpointAddress;
fsg_hs_bulk_out_desc.bEndpointAddress =
fsg_fs_bulk_out_desc.bEndpointAddress;
- fsg_hs_intr_in_desc.bEndpointAddress =
- fsg_fs_intr_in_desc.bEndpointAddress;
}
if (gadget_is_otg(gadget))
/* Allocate for the bulk-in endpoint. We assume that
* the buffer will also work with the bulk-out (and
* interrupt-in) endpoint. */
- bh->buf = kmalloc(mod_data.buflen, GFP_KERNEL);
+ bh->buf = kmalloc(FSG_BUFLEN, GFP_KERNEL);
if (!bh->buf)
goto out;
bh->next = bh + 1;
}
kfree(pathbuf);
- DBG(fsg, "transport=%s (x%02x)\n",
- mod_data.transport_name, mod_data.transport_type);
- DBG(fsg, "protocol=%s (x%02x)\n",
- mod_data.protocol_name, mod_data.protocol_type);
- DBG(fsg, "VendorID=x%04x, ProductID=x%04x, Release=x%04x\n",
- mod_data.vendor, mod_data.product, mod_data.release);
DBG(fsg, "removable=%d, stall=%d, cdrom=%d, buflen=%u\n",
mod_data.removable, mod_data.can_stall,
- mod_data.cdrom, mod_data.buflen);
+ mod_data.cdrom, FSG_BUFLEN);
DBG(fsg, "I/O thread pid: %d\n", task_pid_nr(fsg->thread_task));
set_bit(REGISTERED, &fsg->atomic_bitflags);
}
-/*-------------------------------------------------------------------------*/
-
-static void fsg_suspend(struct usb_gadget *gadget)
-{
- struct fsg_dev *fsg = get_gadget_data(gadget);
-
- DBG(fsg, "suspend\n");
- set_bit(SUSPENDED, &fsg->atomic_bitflags);
-}
-
-static void fsg_resume(struct usb_gadget *gadget)
-{
- struct fsg_dev *fsg = get_gadget_data(gadget);
-
- DBG(fsg, "resume\n");
- clear_bit(SUSPENDED, &fsg->atomic_bitflags);
-}
-
-
/*-------------------------------------------------------------------------*/
static struct usb_gadget_driver fsg_driver = {
.unbind = fsg_unbind,
.disconnect = fsg_disconnect,
.setup = fsg_setup,
- .suspend = fsg_suspend,
- .resume = fsg_resume,
.driver = {
.name = DRIVER_NAME,
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff