diff options
Diffstat (limited to 'drivers/staging/keucr/usb.c')
| -rw-r--r-- | drivers/staging/keucr/usb.c | 642 |
1 files changed, 642 insertions, 0 deletions
diff --git a/drivers/staging/keucr/usb.c b/drivers/staging/keucr/usb.c new file mode 100644 index 00000000000..12ebde7315c --- /dev/null +++ b/drivers/staging/keucr/usb.c @@ -0,0 +1,642 @@ +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/freezer.h> +#include <linux/module.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) +{ + u8 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 = *(struct keucr_sm_status *)&tmp; + + return 0; +} + +static int eucr_reset_resume(struct usb_interface *iface) +{ + u8 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 = *(struct keucr_sm_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 */ + usb_free_coherent(us->pusb_dev, sizeof(*us->cr), us->cr, us->cr_dma); + 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; + u8 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); |