- 根目录:
- drivers
- staging
- keucr
- usb.c
#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);