| #include <linux/sched.h> |
| #include <linux/errno.h> |
| #include <linux/freezer.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/kthread.h> |
| #include <linux/mutex.h> |
| #include <linux/utsname.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_device.h> |
| |
| #include "usb.h" |
| #include "scsiglue.h" |
| #include "smil.h" |
| #include "transport.h" |
| |
| /* Some informational data */ |
| MODULE_AUTHOR("Domao"); |
| MODULE_DESCRIPTION("ENE USB Mass Storage driver for Linux"); |
| MODULE_LICENSE("GPL"); |
| |
| static unsigned int delay_use = 1; |
| |
| static struct usb_device_id eucr_usb_ids [] = { |
| { USB_DEVICE(0x058f, 0x6366) }, |
| { USB_DEVICE(0x0cf2, 0x6230) }, |
| { USB_DEVICE(0x0cf2, 0x6250) }, |
| { } /* Terminating entry */ |
| }; |
| MODULE_DEVICE_TABLE (usb, eucr_usb_ids); |
| |
| |
| #ifdef CONFIG_PM |
| |
| static int eucr_suspend(struct usb_interface *iface, pm_message_t message) |
| { |
| struct us_data *us = usb_get_intfdata(iface); |
| pr_info("--- eucr_suspend ---\n"); |
| /* Wait until no command is running */ |
| mutex_lock(&us->dev_mutex); |
| |
| if (us->suspend_resume_hook) |
| (us->suspend_resume_hook)(us, US_SUSPEND); |
| |
| mutex_unlock(&us->dev_mutex); |
| return 0; |
| } |
| |
| static int eucr_resume(struct usb_interface *iface) |
| { |
| BYTE tmp = 0; |
| |
| struct us_data *us = usb_get_intfdata(iface); |
| pr_info("--- eucr_resume---\n"); |
| mutex_lock(&us->dev_mutex); |
| |
| if (us->suspend_resume_hook) |
| (us->suspend_resume_hook)(us, US_RESUME); |
| |
| |
| mutex_unlock(&us->dev_mutex); |
| |
| us->Power_IsResum = true; |
| |
| us->SM_Status = *(PSM_STATUS)&tmp; |
| |
| return 0; |
| } |
| |
| static int eucr_reset_resume(struct usb_interface *iface) |
| { |
| BYTE tmp = 0; |
| struct us_data *us = usb_get_intfdata(iface); |
| |
| pr_info("--- eucr_reset_resume---\n"); |
| |
| /* Report the reset to the SCSI core */ |
| usb_stor_report_bus_reset(us); |
| |
| /* |
| * FIXME: Notify the subdrivers that they need to reinitialize |
| * the device |
| */ |
| |
| us->Power_IsResum = true; |
| |
| us->SM_Status = *(PSM_STATUS)&tmp; |
| |
| return 0; |
| } |
| |
| #else |
| |
| #define eucr_suspend NULL |
| #define eucr_resume NULL |
| #define eucr_reset_resume NULL |
| |
| #endif |
| |
| static int eucr_pre_reset(struct usb_interface *iface) |
| { |
| struct us_data *us = usb_get_intfdata(iface); |
| |
| pr_info("usb --- eucr_pre_reset\n"); |
| |
| /* Make sure no command runs during the reset */ |
| mutex_lock(&us->dev_mutex); |
| return 0; |
| } |
| |
| static int eucr_post_reset(struct usb_interface *iface) |
| { |
| struct us_data *us = usb_get_intfdata(iface); |
| |
| pr_info("usb --- eucr_post_reset\n"); |
| |
| /* Report the reset to the SCSI core */ |
| usb_stor_report_bus_reset(us); |
| |
| mutex_unlock(&us->dev_mutex); |
| return 0; |
| } |
| |
| void fill_inquiry_response(struct us_data *us, unsigned char *data, unsigned int data_len) |
| { |
| pr_info("usb --- fill_inquiry_response\n"); |
| if (data_len < 36) /* You lose. */ |
| return; |
| |
| if (data[0]&0x20) { |
| memset(data+8,0,28); |
| } else { |
| u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); |
| memcpy(data+8, us->unusual_dev->vendorName, |
| strlen(us->unusual_dev->vendorName) > 8 ? 8 : |
| strlen(us->unusual_dev->vendorName)); |
| memcpy(data+16, us->unusual_dev->productName, |
| strlen(us->unusual_dev->productName) > 16 ? 16 : |
| strlen(us->unusual_dev->productName)); |
| data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); |
| data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); |
| data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); |
| data[35] = 0x30 + ((bcdDevice) & 0x0F); |
| } |
| usb_stor_set_xfer_buf(us, data, data_len, us->srb, TO_XFER_BUF); |
| } |
| |
| static int usb_stor_control_thread(void * __us) |
| { |
| struct us_data *us = (struct us_data *)__us; |
| struct Scsi_Host *host = us_to_host(us); |
| |
| pr_info("usb --- usb_stor_control_thread\n"); |
| for (;;) { |
| if (wait_for_completion_interruptible(&us->cmnd_ready)) |
| break; |
| |
| /* lock the device pointers */ |
| mutex_lock(&(us->dev_mutex)); |
| |
| /* if the device has disconnected, we are free to exit */ |
| if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { |
| mutex_unlock(&us->dev_mutex); |
| break; |
| } |
| |
| /* lock access to the state */ |
| scsi_lock(host); |
| |
| /* When we are called with no command pending, we're done */ |
| if (us->srb == NULL) { |
| scsi_unlock(host); |
| mutex_unlock(&us->dev_mutex); |
| break; |
| } |
| |
| /* has the command timed out *already* ? */ |
| if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
| us->srb->result = DID_ABORT << 16; |
| goto SkipForAbort; |
| } |
| |
| scsi_unlock(host); |
| |
| if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { |
| us->srb->result = DID_ERROR << 16; |
| } else if (us->srb->device->id |
| && !(us->fflags & US_FL_SCM_MULT_TARG)) { |
| us->srb->result = DID_BAD_TARGET << 16; |
| } else if (us->srb->device->lun > us->max_lun) { |
| us->srb->result = DID_BAD_TARGET << 16; |
| } else if ((us->srb->cmnd[0] == INQUIRY) |
| && (us->fflags & US_FL_FIX_INQUIRY)) { |
| unsigned char data_ptr[36] = {0x00, 0x80, 0x02, 0x02, 0x1F, 0x00, 0x00, 0x00}; |
| |
| fill_inquiry_response(us, data_ptr, 36); |
| us->srb->result = SAM_STAT_GOOD; |
| } else { |
| us->proto_handler(us->srb, us); |
| } |
| |
| /* lock access to the state */ |
| scsi_lock(host); |
| |
| /* indicate that the command is done */ |
| if (us->srb->result != DID_ABORT << 16) { |
| us->srb->scsi_done(us->srb); |
| } else { |
| SkipForAbort: |
| pr_info("scsi command aborted\n"); |
| } |
| |
| if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
| complete(&(us->notify)); |
| |
| /* Allow USB transfers to resume */ |
| clear_bit(US_FLIDX_ABORTING, &us->dflags); |
| clear_bit(US_FLIDX_TIMED_OUT, &us->dflags); |
| } |
| |
| /* finished working on this command */ |
| us->srb = NULL; |
| scsi_unlock(host); |
| |
| /* unlock the device pointers */ |
| mutex_unlock(&us->dev_mutex); |
| } /* for (;;) */ |
| |
| /* Wait until we are told to stop */ |
| for (;;) { |
| set_current_state(TASK_INTERRUPTIBLE); |
| if (kthread_should_stop()) |
| break; |
| schedule(); |
| } |
| __set_current_state(TASK_RUNNING); |
| return 0; |
| } |
| |
| static int associate_dev(struct us_data *us, struct usb_interface *intf) |
| { |
| pr_info("usb --- associate_dev\n"); |
| |
| /* Fill in the device-related fields */ |
| us->pusb_dev = interface_to_usbdev(intf); |
| us->pusb_intf = intf; |
| us->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; |
| |
| /* Store our private data in the interface */ |
| usb_set_intfdata(intf, us); |
| |
| /* Allocate the device-related DMA-mapped buffers */ |
| us->cr = usb_alloc_coherent(us->pusb_dev, sizeof(*us->cr), GFP_KERNEL, &us->cr_dma); |
| if (!us->cr) { |
| pr_info("usb_ctrlrequest allocation failed\n"); |
| return -ENOMEM; |
| } |
| |
| us->iobuf = usb_alloc_coherent(us->pusb_dev, US_IOBUF_SIZE, GFP_KERNEL, &us->iobuf_dma); |
| if (!us->iobuf) { |
| pr_info("I/O buffer allocation failed\n"); |
| return -ENOMEM; |
| } |
| |
| us->sensebuf = kmalloc(US_SENSE_SIZE, GFP_KERNEL); |
| if (!us->sensebuf) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int get_device_info(struct us_data *us, const struct usb_device_id *id) |
| { |
| struct usb_device *dev = us->pusb_dev; |
| struct usb_interface_descriptor *idesc = &us->pusb_intf->cur_altsetting->desc; |
| |
| pr_info("usb --- get_device_info\n"); |
| |
| us->subclass = idesc->bInterfaceSubClass; |
| us->protocol = idesc->bInterfaceProtocol; |
| us->fflags = id->driver_info; |
| us->Power_IsResum = false; |
| |
| if (us->fflags & US_FL_IGNORE_DEVICE) { |
| pr_info("device ignored\n"); |
| return -ENODEV; |
| } |
| |
| if (dev->speed != USB_SPEED_HIGH) |
| us->fflags &= ~US_FL_GO_SLOW; |
| |
| return 0; |
| } |
| |
| static int get_transport(struct us_data *us) |
| { |
| pr_info("usb --- get_transport\n"); |
| switch (us->protocol) { |
| case USB_PR_BULK: |
| us->transport_name = "Bulk"; |
| us->transport = usb_stor_Bulk_transport; |
| us->transport_reset = usb_stor_Bulk_reset; |
| break; |
| |
| default: |
| return -EIO; |
| } |
| |
| /* fix for single-lun devices */ |
| if (us->fflags & US_FL_SINGLE_LUN) |
| us->max_lun = 0; |
| return 0; |
| } |
| |
| static int get_protocol(struct us_data *us) |
| { |
| pr_info("usb --- get_protocol\n"); |
| pr_info("us->pusb_dev->descriptor.idVendor = %x\n", |
| us->pusb_dev->descriptor.idVendor); |
| pr_info("us->pusb_dev->descriptor.idProduct = %x\n", |
| us->pusb_dev->descriptor.idProduct); |
| switch (us->subclass) { |
| case USB_SC_SCSI: |
| us->protocol_name = "Transparent SCSI"; |
| if ((us->pusb_dev->descriptor.idVendor == 0x0CF2) |
| && (us->pusb_dev->descriptor.idProduct == 0x6250)) |
| us->proto_handler = ENE_stor_invoke_transport; |
| else |
| us->proto_handler = usb_stor_invoke_transport; |
| break; |
| |
| default: |
| return -EIO; |
| } |
| return 0; |
| } |
| |
| static int get_pipes(struct us_data *us) |
| { |
| struct usb_host_interface *altsetting = us->pusb_intf->cur_altsetting; |
| int i; |
| struct usb_endpoint_descriptor *ep; |
| struct usb_endpoint_descriptor *ep_in = NULL; |
| struct usb_endpoint_descriptor *ep_out = NULL; |
| struct usb_endpoint_descriptor *ep_int = NULL; |
| |
| pr_info("usb --- get_pipes\n"); |
| |
| for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { |
| ep = &altsetting->endpoint[i].desc; |
| |
| if (usb_endpoint_xfer_bulk(ep)) { |
| if (usb_endpoint_dir_in(ep)) { |
| if (!ep_in) |
| ep_in = ep; |
| } else { |
| if (!ep_out) |
| ep_out = ep; |
| } |
| } else if (usb_endpoint_is_int_in(ep)) { |
| if (!ep_int) |
| ep_int = ep; |
| } |
| } |
| |
| if (!ep_in || !ep_out || (us->protocol == USB_PR_CBI && !ep_int)) { |
| pr_info("Endpoint sanity check failed! Rejecting dev.\n"); |
| return -EIO; |
| } |
| |
| /* Calculate and store the pipe values */ |
| us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); |
| us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); |
| us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, ep_out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, ep_in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| if (ep_int) { |
| us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, ep_int->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| us->ep_bInterval = ep_int->bInterval; |
| } |
| return 0; |
| } |
| |
| static int usb_stor_acquire_resources(struct us_data *us) |
| { |
| struct task_struct *th; |
| |
| pr_info("usb --- usb_stor_acquire_resources\n"); |
| us->current_urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!us->current_urb) { |
| pr_info("URB allocation failed\n"); |
| return -ENOMEM; |
| } |
| |
| /* Start up our control thread */ |
| th = kthread_run(usb_stor_control_thread, us, "eucr-storage"); |
| if (IS_ERR(th)) { |
| pr_info("Unable to start control thread\n"); |
| return PTR_ERR(th); |
| } |
| us->ctl_thread = th; |
| |
| return 0; |
| } |
| |
| static void usb_stor_release_resources(struct us_data *us) |
| { |
| pr_info("usb --- usb_stor_release_resources\n"); |
| |
| SM_FreeMem(); |
| |
| complete(&us->cmnd_ready); |
| if (us->ctl_thread) |
| kthread_stop(us->ctl_thread); |
| |
| /* Call the destructor routine, if it exists */ |
| if (us->extra_destructor) { |
| pr_info("-- calling extra_destructor()\n"); |
| us->extra_destructor(us->extra); |
| } |
| |
| /* Free the extra data and the URB */ |
| kfree(us->extra); |
| usb_free_urb(us->current_urb); |
| } |
| |
| static void dissociate_dev(struct us_data *us) |
| { |
| pr_info("usb --- dissociate_dev\n"); |
| |
| kfree(us->sensebuf); |
| |
| /* Free the device-related DMA-mapped buffers */ |
| if (us->cr) |
| usb_free_coherent(us->pusb_dev, sizeof(*us->cr), us->cr, us->cr_dma); |
| if (us->iobuf) |
| usb_free_coherent(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, us->iobuf_dma); |
| |
| /* Remove our private data from the interface */ |
| usb_set_intfdata(us->pusb_intf, NULL); |
| } |
| |
| static void quiesce_and_remove_host(struct us_data *us) |
| { |
| struct Scsi_Host *host = us_to_host(us); |
| |
| pr_info("usb --- quiesce_and_remove_host\n"); |
| |
| /* If the device is really gone, cut short reset delays */ |
| if (us->pusb_dev->state == USB_STATE_NOTATTACHED) |
| set_bit(US_FLIDX_DISCONNECTING, &us->dflags); |
| |
| /* |
| * Prevent SCSI-scanning (if it hasn't started yet) |
| * and wait for the SCSI-scanning thread to stop. |
| */ |
| set_bit(US_FLIDX_DONT_SCAN, &us->dflags); |
| wake_up(&us->delay_wait); |
| wait_for_completion(&us->scanning_done); |
| |
| /* |
| * Removing the host will perform an orderly shutdown: caches |
| * synchronized, disks spun down, etc. |
| */ |
| scsi_remove_host(host); |
| |
| /* |
| * Prevent any new commands from being accepted and cut short |
| * reset delays. |
| */ |
| scsi_lock(host); |
| set_bit(US_FLIDX_DISCONNECTING, &us->dflags); |
| scsi_unlock(host); |
| wake_up(&us->delay_wait); |
| } |
| |
| static void release_everything(struct us_data *us) |
| { |
| pr_info("usb --- release_everything\n"); |
| |
| usb_stor_release_resources(us); |
| dissociate_dev(us); |
| scsi_host_put(us_to_host(us)); |
| } |
| |
| static int usb_stor_scan_thread(void * __us) |
| { |
| struct us_data *us = (struct us_data *)__us; |
| |
| pr_info("usb --- usb_stor_scan_thread\n"); |
| pr_info("EUCR : device found at %d\n", us->pusb_dev->devnum); |
| |
| set_freezable(); |
| /* Wait for the timeout to expire or for a disconnect */ |
| if (delay_use > 0) { |
| wait_event_freezable_timeout(us->delay_wait, |
| test_bit(US_FLIDX_DONT_SCAN, &us->dflags), |
| delay_use * HZ); |
| } |
| |
| /* If the device is still connected, perform the scanning */ |
| if (!test_bit(US_FLIDX_DONT_SCAN, &us->dflags)) { |
| /* For bulk-only devices, determine the max LUN value */ |
| if (us->protocol == USB_PR_BULK |
| && !(us->fflags & US_FL_SINGLE_LUN)) { |
| mutex_lock(&us->dev_mutex); |
| us->max_lun = usb_stor_Bulk_max_lun(us); |
| mutex_unlock(&us->dev_mutex); |
| } |
| scsi_scan_host(us_to_host(us)); |
| pr_info("EUCR : device scan complete\n"); |
| } |
| complete_and_exit(&us->scanning_done, 0); |
| } |
| |
| static int eucr_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| { |
| struct Scsi_Host *host; |
| struct us_data *us; |
| int result; |
| BYTE MiscReg03 = 0; |
| struct task_struct *th; |
| |
| pr_info("usb --- eucr_probe\n"); |
| |
| host = scsi_host_alloc(&usb_stor_host_template, sizeof(*us)); |
| if (!host) { |
| pr_info("Unable to allocate the scsi host\n"); |
| return -ENOMEM; |
| } |
| |
| /* Allow 16-byte CDBs and thus > 2TB */ |
| host->max_cmd_len = 16; |
| us = host_to_us(host); |
| memset(us, 0, sizeof(struct us_data)); |
| mutex_init(&(us->dev_mutex)); |
| init_completion(&us->cmnd_ready); |
| init_completion(&(us->notify)); |
| init_waitqueue_head(&us->delay_wait); |
| init_completion(&us->scanning_done); |
| |
| /* Associate the us_data structure with the USB device */ |
| result = associate_dev(us, intf); |
| if (result) |
| goto BadDevice; |
| |
| /* Get Device info */ |
| result = get_device_info(us, id); |
| if (result) |
| goto BadDevice; |
| |
| /* Get the transport, protocol, and pipe settings */ |
| result = get_transport(us); |
| if (result) |
| goto BadDevice; |
| result = get_protocol(us); |
| if (result) |
| goto BadDevice; |
| result = get_pipes(us); |
| if (result) |
| goto BadDevice; |
| |
| /* Acquire all the other resources and add the host */ |
| result = usb_stor_acquire_resources(us); |
| if (result) |
| goto BadDevice; |
| |
| result = scsi_add_host(host, &intf->dev); |
| if (result) { |
| pr_info("Unable to add the scsi host\n"); |
| goto BadDevice; |
| } |
| |
| /* Start up the thread for delayed SCSI-device scanning */ |
| th = kthread_create(usb_stor_scan_thread, us, "eucr-stor-scan"); |
| if (IS_ERR(th)) { |
| pr_info("Unable to start the device-scanning thread\n"); |
| complete(&us->scanning_done); |
| quiesce_and_remove_host(us); |
| result = PTR_ERR(th); |
| goto BadDevice; |
| } |
| wake_up_process(th); |
| |
| /* probe card type */ |
| result = ene_read_byte(us, REG_CARD_STATUS, &MiscReg03); |
| if (result != USB_STOR_XFER_GOOD) { |
| result = USB_STOR_TRANSPORT_ERROR; |
| quiesce_and_remove_host(us); |
| goto BadDevice; |
| } |
| |
| if (!(MiscReg03 & 0x02)) { |
| result = -ENODEV; |
| quiesce_and_remove_host(us); |
| pr_info("keucr: The driver only supports SM/MS card.\ |
| To use SD card, \ |
| please build driver/usb/storage/ums-eneub6250.ko\n"); |
| goto BadDevice; |
| } |
| |
| return 0; |
| |
| /* We come here if there are any problems */ |
| BadDevice: |
| pr_info("usb --- eucr_probe failed\n"); |
| release_everything(us); |
| return result; |
| } |
| |
| static void eucr_disconnect(struct usb_interface *intf) |
| { |
| struct us_data *us = usb_get_intfdata(intf); |
| |
| pr_info("usb --- eucr_disconnect\n"); |
| quiesce_and_remove_host(us); |
| release_everything(us); |
| } |
| |
| /* Initialization and registration */ |
| static struct usb_driver usb_storage_driver = { |
| .name = "eucr", |
| .probe = eucr_probe, |
| .suspend = eucr_suspend, |
| .resume = eucr_resume, |
| .reset_resume = eucr_reset_resume, |
| .disconnect = eucr_disconnect, |
| .pre_reset = eucr_pre_reset, |
| .post_reset = eucr_post_reset, |
| .id_table = eucr_usb_ids, |
| .soft_unbind = 1, |
| }; |
| |
| module_usb_driver(usb_storage_driver); |