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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Christian Gmeiner
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "usb_storage.h"
#include <string.h>
/*-------------------------------------------------------------------------*/
static struct usb_dcd_controller_ops* ops;
struct usb_device_driver usb_storage_driver = {
.name = "storage",
.bind = usb_storage_driver_bind,
.unbind = NULL,
.request = usb_storage_driver_request,
.suspend = NULL,
.resume = NULL,
.speed = NULL,
};
struct device {
struct usb_ep* in;
struct usb_ep* out;
struct usb_ep* intr;
};
static struct device dev;
/*-------------------------------------------------------------------------*/
#define PROTO_BULK 0x50 // Bulk only
#define SUBCL_SCSI 0x06 // Transparent SCSI
/* Bulk-only class specific requests */
#define USB_BULK_RESET_REQUEST 0xff
#define USB_BULK_GET_MAX_LUN_REQUEST 0xfe
/*-------------------------------------------------------------------------*/
/* usb descriptors */
static struct usb_device_descriptor storage_device_desc = {
.bLength = USB_DT_DEVICE_SIZE,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = 0,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = 64,
.idVendor = 0xffff,
.idProduct = 0x0001,
.iManufacturer = 0,
.iProduct = 0,
.iSerialNumber = 0,
.bNumConfigurations = 1,
};
static struct usb_config_descriptor storage_config_desc = {
.bLength = USB_DT_CONFIG_SIZE,
.bDescriptorType = USB_DT_CONFIG,
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = 0,
.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1,
};
static struct usb_interface_descriptor storage_interface_desc = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bNumEndpoints = 3,
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
.bInterfaceSubClass = SUBCL_SCSI,
.bInterfaceProtocol = PROTO_BULK,
.iInterface = 0,
};
/* endpoint I -> bulk in */
static struct usb_endpoint_descriptor storage_bulk_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 512,
};
/* endpoint II -> bulk out */
static struct usb_endpoint_descriptor storage_bulk_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 512,
};
struct usb_descriptor_header *storage_fullspeed_function[] = {
(struct usb_descriptor_header *) &storage_interface_desc,
(struct usb_descriptor_header *) &storage_bulk_in_desc,
(struct usb_descriptor_header *) &storage_bulk_out_desc,
NULL,
};
#define BUFFER_SIZE 100
uint8_t buf[BUFFER_SIZE];
struct usb_response res;
/* helper functions */
static int config_buf(uint8_t *buf, uint8_t type, unsigned index);
static int set_config(int config);
/*-------------------------------------------------------------------------*/
void usb_storage_driver_init(void)
{
logf("usb storage: register");
usb_device_driver_register(&usb_storage_driver);
}
/*-------------------------------------------------------------------------*/
/* device driver ops */
void usb_storage_driver_bind(void* controler_ops)
{
ops = controler_ops;
/* serach and asign endpoints */
usb_ep_autoconfig_reset();
dev.in = usb_ep_autoconfig(&storage_bulk_in_desc);
if (!dev.in) {
goto autoconf_fail;
}
dev.in->claimed = true;
logf("usb storage: in: %s", dev.in->name);
dev.out = usb_ep_autoconfig(&storage_bulk_out_desc);
if (!dev.out) {
goto autoconf_fail;
}
dev.out->claimed = true;
logf("usb storage: out: %s", dev.out->name);
return;
autoconf_fail:
logf("failed to find endpoints");
}
int usb_storage_driver_request(struct usb_ctrlrequest* request)
{
int ret = -EOPNOTSUPP;
logf("usb storage: request");
res.length = 0;
res.buf = NULL;
switch (request->bRequestType & USB_TYPE_MASK) {
case USB_TYPE_STANDARD:
switch (request->bRequest) {
case USB_REQ_GET_DESCRIPTOR:
switch (request->wValue >> 8) {
case USB_DT_DEVICE:
logf("usb storage: sending device desc");
ret = MIN(sizeof(struct usb_device_descriptor), request->wLength);
res.buf = &storage_device_desc;
break;
case USB_DT_CONFIG:
logf("usb storage: sending config desc");
ret = config_buf(buf, request->wValue >> 8, request->wValue & 0xff);
if (ret >= 0) {
logf("%d, vs %d", request->wLength, ret);
ret = MIN(request->wLength, (uint16_t)ret);
}
res.buf = buf;
break;
}
break;
case USB_REQ_SET_CONFIGURATION:
logf("usb storage: set configuration %d", request->wValue);
ret = set_config(request->wValue);
break;
case USB_REQ_SET_INTERFACE:
logf("usb storage: set interface");
ret = 0;
break;
}
case USB_TYPE_CLASS:
switch (request->bRequest) {
case USB_BULK_RESET_REQUEST:
logf("usb storage: bulk reset");
break;
case USB_BULK_GET_MAX_LUN_REQUEST:
logf("usb storage: get max lun");
/* we support no LUNs (Logical Unit Number) */
buf[0] = 0;
ret = 1;
break;
}
break;
}
if (ret >= 0) {
res.length = ret;
ret = ops->send(NULL, &res);
}
return ret;
}
/*-------------------------------------------------------------------------*/
/* S/GET CONFIGURATION helpers */
static int config_buf(uint8_t *buf, uint8_t type, unsigned index)
{
int len;
/* only one configuration */
if (index != 0) {
return -EINVAL;
}
len = usb_stack_configdesc(&storage_config_desc, buf, BUFFER_SIZE, storage_fullspeed_function);
if (len < 0) {
return len;
}
((struct usb_config_descriptor *)buf)->bDescriptorType = type;
return len;
}
static int set_config(int config)
{
/* enable endpoints */
logf("setup %s", dev.in->name);
ops->enable(dev.in);
logf("setup %s", dev.out->name);
ops->enable(dev.out);
/* setup buffers */
return 0;
}
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