![Greg Kroah-Hartman](/assets/img/avatar_default.png)
The usb tree renamed the USB storage defines to make more sense, so this driver needs the changes as well so that things will compile properly. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
784 lines
22 KiB
C
784 lines
22 KiB
C
#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_device.h>
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#include "usb.h"
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#include "scsiglue.h"
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#include "transport.h"
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/***********************************************************************
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* Data transfer routines
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***********************************************************************/
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//----- usb_stor_blocking_completion() ---------------------
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static void usb_stor_blocking_completion(struct urb *urb)
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{
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struct completion *urb_done_ptr = urb->context;
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//printk("transport --- usb_stor_blocking_completion\n");
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complete(urb_done_ptr);
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}
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//----- usb_stor_msg_common() ---------------------
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static int usb_stor_msg_common(struct us_data *us, int timeout)
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{
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struct completion urb_done;
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long timeleft;
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int status;
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//printk("transport --- usb_stor_msg_common\n");
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if (test_bit(US_FLIDX_ABORTING, &us->dflags))
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return -EIO;
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init_completion(&urb_done);
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us->current_urb->context = &urb_done;
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us->current_urb->actual_length = 0;
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us->current_urb->error_count = 0;
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us->current_urb->status = 0;
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// us->current_urb->transfer_flags = URB_NO_SETUP_DMA_MAP;
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if (us->current_urb->transfer_buffer == us->iobuf)
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us->current_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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us->current_urb->transfer_dma = us->iobuf_dma;
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us->current_urb->setup_dma = us->cr_dma;
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status = usb_submit_urb(us->current_urb, GFP_NOIO);
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if (status)
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return status;
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set_bit(US_FLIDX_URB_ACTIVE, &us->dflags);
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if (test_bit(US_FLIDX_ABORTING, &us->dflags))
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{
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if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags))
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{
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//printk("-- cancelling URB\n");
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usb_unlink_urb(us->current_urb);
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}
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}
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timeleft = wait_for_completion_interruptible_timeout(&urb_done, timeout ? : MAX_SCHEDULE_TIMEOUT);
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clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags);
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if (timeleft <= 0)
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{
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//printk("%s -- cancelling URB\n", timeleft == 0 ? "Timeout" : "Signal");
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usb_kill_urb(us->current_urb);
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}
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return us->current_urb->status;
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}
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//----- usb_stor_control_msg() ---------------------
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int usb_stor_control_msg(struct us_data *us, unsigned int pipe,
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u8 request, u8 requesttype, u16 value, u16 index,
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void *data, u16 size, int timeout)
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{
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int status;
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//printk("transport --- usb_stor_control_msg\n");
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/* fill in the devrequest structure */
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us->cr->bRequestType = requesttype;
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us->cr->bRequest = request;
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us->cr->wValue = cpu_to_le16(value);
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us->cr->wIndex = cpu_to_le16(index);
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us->cr->wLength = cpu_to_le16(size);
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/* fill and submit the URB */
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usb_fill_control_urb(us->current_urb, us->pusb_dev, pipe,
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(unsigned char*) us->cr, data, size,
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usb_stor_blocking_completion, NULL);
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status = usb_stor_msg_common(us, timeout);
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/* return the actual length of the data transferred if no error */
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if (status == 0)
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status = us->current_urb->actual_length;
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return status;
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}
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//----- usb_stor_clear_halt() ---------------------
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int usb_stor_clear_halt(struct us_data *us, unsigned int pipe)
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{
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int result;
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int endp = usb_pipeendpoint(pipe);
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//printk("transport --- usb_stor_clear_halt\n");
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if (usb_pipein (pipe))
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endp |= USB_DIR_IN;
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result = usb_stor_control_msg(us, us->send_ctrl_pipe,
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USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
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USB_ENDPOINT_HALT, endp,
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NULL, 0, 3*HZ);
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/* reset the endpoint toggle */
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if (result >= 0)
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//usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
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usb_reset_endpoint(us->pusb_dev, endp);
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return result;
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}
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//----- interpret_urb_result() ---------------------
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static int interpret_urb_result(struct us_data *us, unsigned int pipe,
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unsigned int length, int result, unsigned int partial)
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{
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//printk("transport --- interpret_urb_result\n");
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switch (result) {
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/* no error code; did we send all the data? */
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case 0:
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if (partial != length)
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{
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//printk("-- short transfer\n");
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return USB_STOR_XFER_SHORT;
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}
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//printk("-- transfer complete\n");
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return USB_STOR_XFER_GOOD;
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case -EPIPE:
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if (usb_pipecontrol(pipe))
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{
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//printk("-- stall on control pipe\n");
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return USB_STOR_XFER_STALLED;
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}
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//printk("clearing endpoint halt for pipe 0x%x\n", pipe);
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if (usb_stor_clear_halt(us, pipe) < 0)
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return USB_STOR_XFER_ERROR;
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return USB_STOR_XFER_STALLED;
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case -EOVERFLOW:
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//printk("-- babble\n");
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return USB_STOR_XFER_LONG;
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case -ECONNRESET:
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//printk("-- transfer cancelled\n");
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return USB_STOR_XFER_ERROR;
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case -EREMOTEIO:
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//printk("-- short read transfer\n");
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return USB_STOR_XFER_SHORT;
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case -EIO:
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//printk("-- abort or disconnect in progress\n");
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return USB_STOR_XFER_ERROR;
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default:
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//printk("-- unknown error\n");
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return USB_STOR_XFER_ERROR;
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}
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}
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//----- usb_stor_bulk_transfer_buf() ---------------------
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int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe,
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void *buf, unsigned int length, unsigned int *act_len)
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{
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int result;
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//printk("transport --- usb_stor_bulk_transfer_buf\n");
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/* fill and submit the URB */
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usb_fill_bulk_urb(us->current_urb, us->pusb_dev, pipe, buf, length, usb_stor_blocking_completion, NULL);
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result = usb_stor_msg_common(us, 0);
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/* store the actual length of the data transferred */
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if (act_len)
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*act_len = us->current_urb->actual_length;
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return interpret_urb_result(us, pipe, length, result, us->current_urb->actual_length);
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}
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//----- usb_stor_bulk_transfer_sglist() ---------------------
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static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe,
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struct scatterlist *sg, int num_sg, unsigned int length,
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unsigned int *act_len)
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{
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int result;
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//printk("transport --- usb_stor_bulk_transfer_sglist\n");
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if (test_bit(US_FLIDX_ABORTING, &us->dflags))
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return USB_STOR_XFER_ERROR;
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/* initialize the scatter-gather request block */
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result = usb_sg_init(&us->current_sg, us->pusb_dev, pipe, 0, sg, num_sg, length, GFP_NOIO);
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if (result)
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{
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//printk("usb_sg_init returned %d\n", result);
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return USB_STOR_XFER_ERROR;
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}
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/* since the block has been initialized successfully, it's now okay to cancel it */
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set_bit(US_FLIDX_SG_ACTIVE, &us->dflags);
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/* did an abort/disconnect occur during the submission? */
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if (test_bit(US_FLIDX_ABORTING, &us->dflags))
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{
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/* cancel the request, if it hasn't been cancelled already */
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if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags))
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{
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//printk("-- cancelling sg request\n");
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usb_sg_cancel(&us->current_sg);
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}
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}
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/* wait for the completion of the transfer */
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usb_sg_wait(&us->current_sg);
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clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags);
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result = us->current_sg.status;
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if (act_len)
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*act_len = us->current_sg.bytes;
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return interpret_urb_result(us, pipe, length, result, us->current_sg.bytes);
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}
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//----- usb_stor_bulk_srb() ---------------------
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int usb_stor_bulk_srb(struct us_data* us, unsigned int pipe, struct scsi_cmnd* srb)
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{
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unsigned int partial;
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int result = usb_stor_bulk_transfer_sglist(us, pipe, scsi_sglist(srb),
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scsi_sg_count(srb), scsi_bufflen(srb),
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&partial);
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scsi_set_resid(srb, scsi_bufflen(srb) - partial);
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return result;
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}
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//----- usb_stor_bulk_transfer_sg() ---------------------
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int usb_stor_bulk_transfer_sg(struct us_data* us, unsigned int pipe,
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void *buf, unsigned int length_left, int use_sg, int *residual)
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{
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int result;
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unsigned int partial;
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//printk("transport --- usb_stor_bulk_transfer_sg\n");
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/* are we scatter-gathering? */
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if (use_sg)
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{
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/* use the usb core scatter-gather primitives */
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result = usb_stor_bulk_transfer_sglist(us, pipe,
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(struct scatterlist *) buf, use_sg,
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length_left, &partial);
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length_left -= partial;
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}
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else
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{
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/* no scatter-gather, just make the request */
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result = usb_stor_bulk_transfer_buf(us, pipe, buf, length_left, &partial);
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length_left -= partial;
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}
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/* store the residual and return the error code */
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if (residual)
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*residual = length_left;
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return result;
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}
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/***********************************************************************
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* Transport routines
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***********************************************************************/
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//----- usb_stor_invoke_transport() ---------------------
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void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
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{
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int need_auto_sense;
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int result;
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//printk("transport --- usb_stor_invoke_transport\n");
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usb_stor_print_cmd(srb);
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/* send the command to the transport layer */
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scsi_set_resid(srb, 0);
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result = us->transport(srb, us); //usb_stor_Bulk_transport;
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/* if the command gets aborted by the higher layers, we need to short-circuit all other processing */
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if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags))
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{
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//printk("-- command was aborted\n");
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srb->result = DID_ABORT << 16;
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goto Handle_Errors;
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}
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/* if there is a transport error, reset and don't auto-sense */
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if (result == USB_STOR_TRANSPORT_ERROR)
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{
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//printk("-- transport indicates error, resetting\n");
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srb->result = DID_ERROR << 16;
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goto Handle_Errors;
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}
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/* if the transport provided its own sense data, don't auto-sense */
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if (result == USB_STOR_TRANSPORT_NO_SENSE)
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{
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srb->result = SAM_STAT_CHECK_CONDITION;
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return;
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}
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srb->result = SAM_STAT_GOOD;
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/* Determine if we need to auto-sense */
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need_auto_sense = 0;
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if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) && srb->sc_data_direction != DMA_FROM_DEVICE)
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{
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//printk("-- CB transport device requiring auto-sense\n");
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need_auto_sense = 1;
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}
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if (result == USB_STOR_TRANSPORT_FAILED)
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{
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//printk("-- transport indicates command failure\n");
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need_auto_sense = 1;
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}
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/* Now, if we need to do the auto-sense, let's do it */
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if (need_auto_sense)
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{
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int temp_result;
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struct scsi_eh_save ses;
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printk("Issuing auto-REQUEST_SENSE\n");
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scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE);
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/* we must do the protocol translation here */
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if (us->subclass == USB_SC_RBC || us->subclass == USB_SC_SCSI || us->subclass == USB_SC_CYP_ATACB)
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srb->cmd_len = 6;
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else
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srb->cmd_len = 12;
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/* issue the auto-sense command */
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scsi_set_resid(srb, 0);
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temp_result = us->transport(us->srb, us);
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/* let's clean up right away */
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scsi_eh_restore_cmnd(srb, &ses);
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if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags))
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{
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//printk("-- auto-sense aborted\n");
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srb->result = DID_ABORT << 16;
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goto Handle_Errors;
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}
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if (temp_result != USB_STOR_TRANSPORT_GOOD)
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{
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//printk("-- auto-sense failure\n");
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srb->result = DID_ERROR << 16;
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if (!(us->fflags & US_FL_SCM_MULT_TARG))
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goto Handle_Errors;
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return;
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}
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/* set the result so the higher layers expect this data */
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srb->result = SAM_STAT_CHECK_CONDITION;
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if (result == USB_STOR_TRANSPORT_GOOD &&
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(srb->sense_buffer[2] & 0xaf) == 0 &&
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srb->sense_buffer[12] == 0 &&
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srb->sense_buffer[13] == 0)
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{
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srb->result = SAM_STAT_GOOD;
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srb->sense_buffer[0] = 0x0;
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}
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}
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/* Did we transfer less than the minimum amount required? */
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if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow)
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srb->result = (DID_ERROR << 16);//v02 | (SUGGEST_RETRY << 24);
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return;
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Handle_Errors:
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scsi_lock(us_to_host(us));
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set_bit(US_FLIDX_RESETTING, &us->dflags);
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clear_bit(US_FLIDX_ABORTING, &us->dflags);
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scsi_unlock(us_to_host(us));
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mutex_unlock(&us->dev_mutex);
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result = usb_stor_port_reset(us);
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mutex_lock(&us->dev_mutex);
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if (result < 0)
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{
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scsi_lock(us_to_host(us));
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usb_stor_report_device_reset(us);
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scsi_unlock(us_to_host(us));
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us->transport_reset(us);
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}
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clear_bit(US_FLIDX_RESETTING, &us->dflags);
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}
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//----- ENE_stor_invoke_transport() ---------------------
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void ENE_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
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{
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int result=0;
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//printk("transport --- ENE_stor_invoke_transport\n");
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usb_stor_print_cmd(srb);
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/* send the command to the transport layer */
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scsi_set_resid(srb, 0);
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if ( !(us->SD_Status.Ready || us->MS_Status.Ready || us->SM_Status.Ready) )
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result = ENE_InitMedia(us);
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if (us->Power_IsResum == true) {
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result = ENE_InitMedia(us);
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us->Power_IsResum = false;
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}
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if (us->SD_Status.Ready) result = SD_SCSIIrp(us, srb);
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if (us->MS_Status.Ready) result = MS_SCSIIrp(us, srb);
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if (us->SM_Status.Ready) result = SM_SCSIIrp(us, srb);
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/* if the command gets aborted by the higher layers, we need to short-circuit all other processing */
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if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags))
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{
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//printk("-- command was aborted\n");
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srb->result = DID_ABORT << 16;
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goto Handle_Errors;
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}
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/* if there is a transport error, reset and don't auto-sense */
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if (result == USB_STOR_TRANSPORT_ERROR)
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{
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//printk("-- transport indicates error, resetting\n");
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srb->result = DID_ERROR << 16;
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goto Handle_Errors;
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}
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/* if the transport provided its own sense data, don't auto-sense */
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if (result == USB_STOR_TRANSPORT_NO_SENSE)
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{
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srb->result = SAM_STAT_CHECK_CONDITION;
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return;
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}
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srb->result = SAM_STAT_GOOD;
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if (result == USB_STOR_TRANSPORT_FAILED)
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{
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//printk("-- transport indicates command failure\n");
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//need_auto_sense = 1;
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BuildSenseBuffer(srb, us->SrbStatus);
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srb->result = SAM_STAT_CHECK_CONDITION;
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}
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/* Did we transfer less than the minimum amount required? */
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if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow)
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srb->result = (DID_ERROR << 16);//v02 | (SUGGEST_RETRY << 24);
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return;
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Handle_Errors:
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scsi_lock(us_to_host(us));
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set_bit(US_FLIDX_RESETTING, &us->dflags);
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clear_bit(US_FLIDX_ABORTING, &us->dflags);
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scsi_unlock(us_to_host(us));
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mutex_unlock(&us->dev_mutex);
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result = usb_stor_port_reset(us);
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mutex_lock(&us->dev_mutex);
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if (result < 0)
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{
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scsi_lock(us_to_host(us));
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usb_stor_report_device_reset(us);
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scsi_unlock(us_to_host(us));
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us->transport_reset(us);
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}
|
|
clear_bit(US_FLIDX_RESETTING, &us->dflags);
|
|
}
|
|
|
|
//----- BuildSenseBuffer() -------------------------------------------
|
|
void BuildSenseBuffer(struct scsi_cmnd *srb, int SrbStatus)
|
|
{
|
|
BYTE *buf = srb->sense_buffer;
|
|
BYTE asc;
|
|
|
|
printk("transport --- BuildSenseBuffer\n");
|
|
switch (SrbStatus)
|
|
{
|
|
case SS_NOT_READY: asc = 0x3a; break; // sense key = 0x02
|
|
case SS_MEDIUM_ERR: asc = 0x0c; break; // sense key = 0x03
|
|
case SS_ILLEGAL_REQUEST: asc = 0x20; break; // sense key = 0x05
|
|
default: asc = 0x00; break; // ??
|
|
}
|
|
|
|
memset(buf, 0, 18);
|
|
buf[0x00] = 0xf0;
|
|
buf[0x02] = SrbStatus;
|
|
buf[0x07] = 0x0b;
|
|
buf[0x0c] = asc;
|
|
}
|
|
|
|
//----- usb_stor_stop_transport() ---------------------
|
|
void usb_stor_stop_transport(struct us_data *us)
|
|
{
|
|
//printk("transport --- usb_stor_stop_transport\n");
|
|
|
|
if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags))
|
|
{
|
|
//printk("-- cancelling URB\n");
|
|
usb_unlink_urb(us->current_urb);
|
|
}
|
|
|
|
if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags))
|
|
{
|
|
//printk("-- cancelling sg request\n");
|
|
usb_sg_cancel(&us->current_sg);
|
|
}
|
|
}
|
|
|
|
//----- usb_stor_Bulk_max_lun() ---------------------
|
|
int usb_stor_Bulk_max_lun(struct us_data *us)
|
|
{
|
|
int result;
|
|
|
|
//printk("transport --- usb_stor_Bulk_max_lun\n");
|
|
/* issue the command */
|
|
us->iobuf[0] = 0;
|
|
result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
|
|
US_BULK_GET_MAX_LUN,
|
|
USB_DIR_IN | USB_TYPE_CLASS |
|
|
USB_RECIP_INTERFACE,
|
|
0, us->ifnum, us->iobuf, 1, HZ);
|
|
|
|
//printk("GetMaxLUN command result is %d, data is %d\n", result, us->iobuf[0]);
|
|
|
|
/* if we have a successful request, return the result */
|
|
if (result > 0)
|
|
return us->iobuf[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
//----- usb_stor_Bulk_transport() ---------------------
|
|
int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
|
|
{
|
|
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
|
|
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
|
|
unsigned int transfer_length = scsi_bufflen(srb);
|
|
unsigned int residue;
|
|
int result;
|
|
int fake_sense = 0;
|
|
unsigned int cswlen;
|
|
unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
|
|
|
|
//printk("transport --- usb_stor_Bulk_transport\n");
|
|
/* Take care of BULK32 devices; set extra byte to 0 */
|
|
if (unlikely(us->fflags & US_FL_BULK32))
|
|
{
|
|
cbwlen = 32;
|
|
us->iobuf[31] = 0;
|
|
}
|
|
|
|
/* set up the command wrapper */
|
|
bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
|
|
bcb->DataTransferLength = cpu_to_le32(transfer_length);
|
|
bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ? 1 << 7 : 0;
|
|
bcb->Tag = ++us->tag;
|
|
bcb->Lun = srb->device->lun;
|
|
if (us->fflags & US_FL_SCM_MULT_TARG)
|
|
bcb->Lun |= srb->device->id << 4;
|
|
bcb->Length = srb->cmd_len;
|
|
|
|
/* copy the command payload */
|
|
memset(bcb->CDB, 0, sizeof(bcb->CDB));
|
|
memcpy(bcb->CDB, srb->cmnd, bcb->Length);
|
|
|
|
// send command
|
|
/* send it to out endpoint */
|
|
/*printk("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n",
|
|
le32_to_cpu(bcb->Signature), bcb->Tag,
|
|
le32_to_cpu(bcb->DataTransferLength), bcb->Flags,
|
|
(bcb->Lun >> 4), (bcb->Lun & 0x0F),
|
|
bcb->Length);*/
|
|
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb, cbwlen, NULL);
|
|
//printk("Bulk command transfer result=%d\n", result);
|
|
if (result != USB_STOR_XFER_GOOD)
|
|
return USB_STOR_TRANSPORT_ERROR;
|
|
|
|
if (unlikely(us->fflags & US_FL_GO_SLOW))
|
|
udelay(125);
|
|
|
|
// R/W data
|
|
if (transfer_length)
|
|
{
|
|
unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ? us->recv_bulk_pipe : us->send_bulk_pipe;
|
|
result = usb_stor_bulk_srb(us, pipe, srb);
|
|
//printk("Bulk data transfer result 0x%x\n", result);
|
|
if (result == USB_STOR_XFER_ERROR)
|
|
return USB_STOR_TRANSPORT_ERROR;
|
|
|
|
if (result == USB_STOR_XFER_LONG)
|
|
fake_sense = 1;
|
|
}
|
|
|
|
/* get CSW for device status */
|
|
//printk("Attempting to get CSW...\n");
|
|
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, US_BULK_CS_WRAP_LEN, &cswlen);
|
|
|
|
if (result == USB_STOR_XFER_SHORT && cswlen == 0)
|
|
{
|
|
//printk("Received 0-length CSW; retrying...\n");
|
|
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, US_BULK_CS_WRAP_LEN, &cswlen);
|
|
}
|
|
|
|
/* did the attempt to read the CSW fail? */
|
|
if (result == USB_STOR_XFER_STALLED)
|
|
{
|
|
/* get the status again */
|
|
//printk("Attempting to get CSW (2nd try)...\n");
|
|
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, US_BULK_CS_WRAP_LEN, NULL);
|
|
}
|
|
|
|
/* if we still have a failure at this point, we're in trouble */
|
|
//printk("Bulk status result = %d\n", result);
|
|
if (result != USB_STOR_XFER_GOOD)
|
|
return USB_STOR_TRANSPORT_ERROR;
|
|
|
|
/* check bulk status */
|
|
residue = le32_to_cpu(bcs->Residue);
|
|
//printk("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n", le32_to_cpu(bcs->Signature), bcs->Tag, residue, bcs->Status);
|
|
if (!(bcs->Tag == us->tag || (us->fflags & US_FL_BULK_IGNORE_TAG)) || bcs->Status > US_BULK_STAT_PHASE)
|
|
{
|
|
//printk("Bulk logical error\n");
|
|
return USB_STOR_TRANSPORT_ERROR;
|
|
}
|
|
|
|
if (!us->bcs_signature)
|
|
{
|
|
us->bcs_signature = bcs->Signature;
|
|
//if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN))
|
|
// printk("Learnt BCS signature 0x%08X\n", le32_to_cpu(us->bcs_signature));
|
|
}
|
|
else if (bcs->Signature != us->bcs_signature)
|
|
{
|
|
/*printk("Signature mismatch: got %08X, expecting %08X\n",
|
|
le32_to_cpu(bcs->Signature),
|
|
le32_to_cpu(us->bcs_signature));*/
|
|
return USB_STOR_TRANSPORT_ERROR;
|
|
}
|
|
|
|
/* try to compute the actual residue, based on how much data
|
|
* was really transferred and what the device tells us */
|
|
if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE))
|
|
{
|
|
|
|
/* Heuristically detect devices that generate bogus residues
|
|
* by seeing what happens with INQUIRY and READ CAPACITY
|
|
* commands.
|
|
*/
|
|
if (bcs->Status == US_BULK_STAT_OK &&
|
|
scsi_get_resid(srb) == 0 &&
|
|
((srb->cmnd[0] == INQUIRY &&
|
|
transfer_length == 36) ||
|
|
(srb->cmnd[0] == READ_CAPACITY &&
|
|
transfer_length == 8)))
|
|
{
|
|
us->fflags |= US_FL_IGNORE_RESIDUE;
|
|
|
|
}
|
|
else
|
|
{
|
|
residue = min(residue, transfer_length);
|
|
scsi_set_resid(srb, max(scsi_get_resid(srb), (int) residue));
|
|
}
|
|
}
|
|
|
|
/* based on the status code, we report good or bad */
|
|
switch (bcs->Status)
|
|
{
|
|
case US_BULK_STAT_OK:
|
|
if (fake_sense)
|
|
{
|
|
memcpy(srb->sense_buffer, usb_stor_sense_invalidCDB, sizeof(usb_stor_sense_invalidCDB));
|
|
return USB_STOR_TRANSPORT_NO_SENSE;
|
|
}
|
|
return USB_STOR_TRANSPORT_GOOD;
|
|
|
|
case US_BULK_STAT_FAIL:
|
|
return USB_STOR_TRANSPORT_FAILED;
|
|
|
|
case US_BULK_STAT_PHASE:
|
|
return USB_STOR_TRANSPORT_ERROR;
|
|
}
|
|
return USB_STOR_TRANSPORT_ERROR;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* Reset routines
|
|
***********************************************************************/
|
|
//----- usb_stor_reset_common() ---------------------
|
|
static int usb_stor_reset_common(struct us_data *us,
|
|
u8 request, u8 requesttype,
|
|
u16 value, u16 index, void *data, u16 size)
|
|
{
|
|
int result;
|
|
int result2;
|
|
|
|
//printk("transport --- usb_stor_reset_common\n");
|
|
if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags))
|
|
{
|
|
//printk("No reset during disconnect\n");
|
|
return -EIO;
|
|
}
|
|
|
|
result = usb_stor_control_msg(us, us->send_ctrl_pipe, request, requesttype, value, index, data, size, 5*HZ);
|
|
if (result < 0)
|
|
{
|
|
//printk("Soft reset failed: %d\n", result);
|
|
return result;
|
|
}
|
|
|
|
wait_event_interruptible_timeout(us->delay_wait, test_bit(US_FLIDX_DISCONNECTING, &us->dflags), HZ*6);
|
|
if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags))
|
|
{
|
|
//printk("Reset interrupted by disconnect\n");
|
|
return -EIO;
|
|
}
|
|
|
|
//printk("Soft reset: clearing bulk-in endpoint halt\n");
|
|
result = usb_stor_clear_halt(us, us->recv_bulk_pipe);
|
|
|
|
//printk("Soft reset: clearing bulk-out endpoint halt\n");
|
|
result2 = usb_stor_clear_halt(us, us->send_bulk_pipe);
|
|
|
|
/* return a result code based on the result of the clear-halts */
|
|
if (result >= 0)
|
|
result = result2;
|
|
//if (result < 0)
|
|
// printk("Soft reset failed\n");
|
|
//else
|
|
// printk("Soft reset done\n");
|
|
return result;
|
|
}
|
|
|
|
//----- usb_stor_Bulk_reset() ---------------------
|
|
int usb_stor_Bulk_reset(struct us_data *us)
|
|
{
|
|
//printk("transport --- usb_stor_Bulk_reset\n");
|
|
return usb_stor_reset_common(us, US_BULK_RESET_REQUEST,
|
|
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
|
0, us->ifnum, NULL, 0);
|
|
}
|
|
|
|
//----- usb_stor_port_reset() ---------------------
|
|
int usb_stor_port_reset(struct us_data *us)
|
|
{
|
|
int result;
|
|
|
|
//printk("transport --- usb_stor_port_reset\n");
|
|
result = usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf);
|
|
if (result < 0)
|
|
printk("unable to lock device for reset: %d\n", result);
|
|
else {
|
|
/* Were we disconnected while waiting for the lock? */
|
|
if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
|
|
result = -EIO;
|
|
//printk("No reset during disconnect\n");
|
|
} else {
|
|
result = usb_reset_device(us->pusb_dev);
|
|
//printk("usb_reset_composite_device returns %d\n", result);
|
|
}
|
|
usb_unlock_device(us->pusb_dev);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|