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Merge "usb: gadget: Add snapshot of CCID function driver"

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Linux Build Service Account 2017-01-31 04:42:34 -08:00 • committed by Gerrit - the friendly Code Review server
commit 22369c78bc
5 changed files with 1207 additions and 0 deletions
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11
drivers/usb/gadget/Kconfig
View file

@ -229,6 +229,9 @@ config USB_F_CDEV
config USB_F_QDSS
tristate
config USB_F_CCID
tristate
choice
tristate "USB Gadget Drivers"
default USB_ETH
@ -562,6 +565,14 @@ config USB_CONFIGFS_F_QDSS
help
USB QDSS function driver to get hwtracing related data over USB.
config USB_CONFIGFS_F_CCID
bool "USB CCID function"
select USB_F_CCID
depends on USB_CONFIGFS
help
USB CCID function driver creats transport layer between the
userspace CCID component and the Windows Host.
source "drivers/usb/gadget/legacy/Kconfig"
endchoice

2
drivers/usb/gadget/function/Makefile
View file

@ -64,3 +64,5 @@ usb_f_qcrndis-y := f_qc_rndis.o u_data_ipa.o
obj-$(CONFIG_USB_F_QCRNDIS) += usb_f_qcrndis.o
usb_f_rmnet_bam-y := f_rmnet.o u_ctrl_qti.o
obj-$(CONFIG_USB_F_RMNET_BAM) += usb_f_rmnet_bam.o
usb_f_ccid-y := f_ccid.o
obj-$(CONFIG_USB_F_CCID) += usb_f_ccid.o

999
drivers/usb/gadget/function/f_ccid.c Normal file
View file

@ -0,0 +1,999 @@
/*
* f_ccid.c -- CCID function Driver
*
* Copyright (c) 2011, 2013, 2017 The Linux Foundation. All rights reserved.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*/
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/usb/ccid_desc.h>
#include <linux/miscdevice.h>
#include "f_ccid.h"
#define BULK_IN_BUFFER_SIZE sizeof(struct ccid_bulk_in_header)
#define BULK_OUT_BUFFER_SIZE sizeof(struct ccid_bulk_out_header)
#define CTRL_BUF_SIZE 4
#define FUNCTION_NAME "ccid"
#define CCID_NOTIFY_INTERVAL 5
#define CCID_NOTIFY_MAXPACKET 4
/* number of tx requests to allocate */
#define TX_REQ_MAX 4
struct ccid_ctrl_dev {
atomic_t opened;
struct list_head tx_q;
wait_queue_head_t tx_wait_q;
unsigned char buf[CTRL_BUF_SIZE];
int tx_ctrl_done;
};
struct ccid_bulk_dev {
atomic_t error;
atomic_t opened;
atomic_t rx_req_busy;
wait_queue_head_t read_wq;
wait_queue_head_t write_wq;
struct usb_request *rx_req;
int rx_done;
struct list_head tx_idle;
};
struct f_ccid {
struct usb_function function;
struct usb_composite_dev *cdev;
int ifc_id;
spinlock_t lock;
atomic_t online;
/* usb eps*/
struct usb_ep *notify;
struct usb_ep *in;
struct usb_ep *out;
struct usb_request *notify_req;
struct ccid_ctrl_dev ctrl_dev;
struct ccid_bulk_dev bulk_dev;
int dtr_state;
};
static struct f_ccid *_ccid_dev;
static struct miscdevice ccid_bulk_device;
static struct miscdevice ccid_ctrl_device;
/* Interface Descriptor: */
static struct usb_interface_descriptor ccid_interface_desc = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bNumEndpoints = 3,
.bInterfaceClass = USB_CLASS_CSCID,
.bInterfaceSubClass = 0,
.bInterfaceProtocol = 0,
};
/* CCID Class Descriptor */
static struct usb_ccid_class_descriptor ccid_class_desc = {
.bLength = sizeof(ccid_class_desc),
.bDescriptorType = CCID_DECRIPTOR_TYPE,
.bcdCCID = CCID1_10,
.bMaxSlotIndex = 0,
/* This value indicates what voltages the CCID can supply to slots */
.bVoltageSupport = VOLTS_3_0,
.dwProtocols = PROTOCOL_TO,
/* Default ICC clock frequency in KHz */
.dwDefaultClock = 3580,
/* Maximum supported ICC clock frequency in KHz */
.dwMaximumClock = 3580,
.bNumClockSupported = 0,
/* Default ICC I/O data rate in bps */
.dwDataRate = 9600,
/* Maximum supported ICC I/O data rate in bps */
.dwMaxDataRate = 9600,
.bNumDataRatesSupported = 0,
.dwMaxIFSD = 0,
.dwSynchProtocols = 0,
.dwMechanical = 0,
/* This value indicates what intelligent features the CCID has */
.dwFeatures = CCID_FEATURES_EXC_SAPDU |
CCID_FEATURES_AUTO_PNEGO |
CCID_FEATURES_AUTO_BAUD |
CCID_FEATURES_AUTO_CLOCK |
CCID_FEATURES_AUTO_VOLT |
CCID_FEATURES_AUTO_ACTIV |
CCID_FEATURES_AUTO_PCONF,
/* extended APDU level Message Length */
.dwMaxCCIDMessageLength = 0x200,
.bClassGetResponse = 0x0,
.bClassEnvelope = 0x0,
.wLcdLayout = 0,
.bPINSupport = 0,
.bMaxCCIDBusySlots = 1
};
/* Full speed support: */
static struct usb_endpoint_descriptor ccid_fs_notify_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = cpu_to_le16(CCID_NOTIFY_MAXPACKET),
.bInterval = 1 << CCID_NOTIFY_INTERVAL,
};
static struct usb_endpoint_descriptor ccid_fs_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(64),
};
static struct usb_endpoint_descriptor ccid_fs_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(64),
};
static struct usb_descriptor_header *ccid_fs_descs[] = {
(struct usb_descriptor_header *) &ccid_interface_desc,
(struct usb_descriptor_header *) &ccid_class_desc,
(struct usb_descriptor_header *) &ccid_fs_notify_desc,
(struct usb_descriptor_header *) &ccid_fs_in_desc,
(struct usb_descriptor_header *) &ccid_fs_out_desc,
NULL,
};
/* High speed support: */
static struct usb_endpoint_descriptor ccid_hs_notify_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = cpu_to_le16(CCID_NOTIFY_MAXPACKET),
.bInterval = CCID_NOTIFY_INTERVAL + 4,
};
static struct usb_endpoint_descriptor ccid_hs_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(512),
};
static struct usb_endpoint_descriptor ccid_hs_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(512),
};
static struct usb_descriptor_header *ccid_hs_descs[] = {
(struct usb_descriptor_header *) &ccid_interface_desc,
(struct usb_descriptor_header *) &ccid_class_desc,
(struct usb_descriptor_header *) &ccid_hs_notify_desc,
(struct usb_descriptor_header *) &ccid_hs_in_desc,
(struct usb_descriptor_header *) &ccid_hs_out_desc,
NULL,
};
static inline struct f_ccid *func_to_ccid(struct usb_function *f)
{
return container_of(f, struct f_ccid, function);
}
static void ccid_req_put(struct f_ccid *ccid_dev, struct list_head *head,
struct usb_request *req)
{
unsigned long flags;
spin_lock_irqsave(&ccid_dev->lock, flags);
list_add_tail(&req->list, head);
spin_unlock_irqrestore(&ccid_dev->lock, flags);
}
static struct usb_request *ccid_req_get(struct f_ccid *ccid_dev,
struct list_head *head)
{
unsigned long flags;
struct usb_request *req = NULL;
spin_lock_irqsave(&ccid_dev->lock, flags);
if (!list_empty(head)) {
req = list_first_entry(head, struct usb_request, list);
list_del(&req->list);
}
spin_unlock_irqrestore(&ccid_dev->lock, flags);
return req;
}
static void ccid_notify_complete(struct usb_ep *ep, struct usb_request *req)
{
switch (req->status) {
case -ECONNRESET:
case -ESHUTDOWN:
case 0:
break;
default:
pr_err("CCID notify ep error %d\n", req->status);
}
}
static void ccid_bulk_complete_in(struct usb_ep *ep, struct usb_request *req)
{
struct f_ccid *ccid_dev = _ccid_dev;
struct ccid_bulk_dev *bulk_dev = &ccid_dev->bulk_dev;
if (req->status != 0)
atomic_set(&bulk_dev->error, 1);
ccid_req_put(ccid_dev, &bulk_dev->tx_idle, req);
wake_up(&bulk_dev->write_wq);
}
static void ccid_bulk_complete_out(struct usb_ep *ep, struct usb_request *req)
{
struct f_ccid *ccid_dev = _ccid_dev;
struct ccid_bulk_dev *bulk_dev = &ccid_dev->bulk_dev;
if (req->status != 0)
atomic_set(&bulk_dev->error, 1);
bulk_dev->rx_done = 1;
wake_up(&bulk_dev->read_wq);
}
static struct usb_request *
ccid_request_alloc(struct usb_ep *ep, unsigned len, gfp_t kmalloc_flags)
{
struct usb_request *req;
req = usb_ep_alloc_request(ep, kmalloc_flags);
if (req != NULL) {
req->length = len;
req->buf = kmalloc(len, kmalloc_flags);
if (req->buf == NULL) {
usb_ep_free_request(ep, req);
req = NULL;
}
}
return req ? req : ERR_PTR(-ENOMEM);
}
static void ccid_request_free(struct usb_request *req, struct usb_ep *ep)
{
if (req) {
kfree(req->buf);
usb_ep_free_request(ep, req);
}
}
static int
ccid_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
{
struct f_ccid *ccid_dev = container_of(f, struct f_ccid, function);
struct ccid_ctrl_dev *ctrl_dev = &ccid_dev->ctrl_dev;
struct usb_composite_dev *cdev = f->config->cdev;
struct usb_request *req = cdev->req;
int ret = -EOPNOTSUPP;
u16 w_index = le16_to_cpu(ctrl->wIndex);
u16 w_value = le16_to_cpu(ctrl->wValue);
u16 w_length = le16_to_cpu(ctrl->wLength);
if (!atomic_read(&ccid_dev->online))
return -ENOTCONN;
switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
| CCIDGENERICREQ_ABORT:
if (w_length != 0)
goto invalid;
ctrl_dev->buf[0] = CCIDGENERICREQ_ABORT;
ctrl_dev->buf[1] = w_value & 0xFF;
ctrl_dev->buf[2] = (w_value >> 8) & 0xFF;
ctrl_dev->buf[3] = 0x00;
ctrl_dev->tx_ctrl_done = 1;
wake_up(&ctrl_dev->tx_wait_q);
ret = 0;
break;
case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
| CCIDGENERICREQ_GET_CLOCK_FREQUENCIES:
*(u32 *) req->buf =
cpu_to_le32(ccid_class_desc.dwDefaultClock);
ret = min_t(u32, w_length,
sizeof(ccid_class_desc.dwDefaultClock));
break;
case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
| CCIDGENERICREQ_GET_DATA_RATES:
*(u32 *) req->buf = cpu_to_le32(ccid_class_desc.dwDataRate);
ret = min_t(u32, w_length, sizeof(ccid_class_desc.dwDataRate));
break;
default:
invalid:
pr_debug("invalid control req%02x.%02x v%04x i%04x l%d\n",
ctrl->bRequestType, ctrl->bRequest,
w_value, w_index, w_length);
}
/* respond with data transfer or status phase? */
if (ret >= 0) {
pr_debug("ccid req%02x.%02x v%04x i%04x l%d\n",
ctrl->bRequestType, ctrl->bRequest,
w_value, w_index, w_length);
req->length = ret;
ret = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
if (ret < 0)
pr_err("ccid ep0 enqueue err %d\n", ret);
}
return ret;
}
static void ccid_function_disable(struct usb_function *f)
{
struct f_ccid *ccid_dev = func_to_ccid(f);
struct ccid_bulk_dev *bulk_dev = &ccid_dev->bulk_dev;
struct ccid_ctrl_dev *ctrl_dev = &ccid_dev->ctrl_dev;
struct usb_request *req;
/* Disable endpoints */
usb_ep_disable(ccid_dev->notify);
usb_ep_disable(ccid_dev->in);
usb_ep_disable(ccid_dev->out);
/* Free endpoint related requests */
ccid_request_free(ccid_dev->notify_req, ccid_dev->notify);
if (!atomic_read(&bulk_dev->rx_req_busy))
ccid_request_free(bulk_dev->rx_req, ccid_dev->out);
while ((req = ccid_req_get(ccid_dev, &bulk_dev->tx_idle)))
ccid_request_free(req, ccid_dev->in);
ccid_dev->dtr_state = 0;
atomic_set(&ccid_dev->online, 0);
/* Wake up threads */
wake_up(&bulk_dev->write_wq);
wake_up(&bulk_dev->read_wq);
wake_up(&ctrl_dev->tx_wait_q);
}
static int
ccid_function_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct f_ccid *ccid_dev = func_to_ccid(f);
struct usb_composite_dev *cdev = ccid_dev->cdev;
struct ccid_bulk_dev *bulk_dev = &ccid_dev->bulk_dev;
struct usb_request *req;
int ret = 0;
int i;
ccid_dev->notify_req = ccid_request_alloc(ccid_dev->notify,
sizeof(struct usb_ccid_notification), GFP_ATOMIC);
if (IS_ERR(ccid_dev->notify_req)) {
pr_err("%s: unable to allocate memory for notify req\n",
__func__);
return PTR_ERR(ccid_dev->notify_req);
}
ccid_dev->notify_req->complete = ccid_notify_complete;
ccid_dev->notify_req->context = ccid_dev;
/* now allocate requests for our endpoints */
req = ccid_request_alloc(ccid_dev->out, (unsigned)BULK_OUT_BUFFER_SIZE,
GFP_ATOMIC);
if (IS_ERR(req)) {
pr_err("%s: unable to allocate memory for out req\n",
__func__);
ret = PTR_ERR(req);
goto free_notify;
}
req->complete = ccid_bulk_complete_out;
req->context = ccid_dev;
bulk_dev->rx_req = req;
for (i = 0; i < TX_REQ_MAX; i++) {
req = ccid_request_alloc(ccid_dev->in,
(unsigned)BULK_IN_BUFFER_SIZE,
GFP_ATOMIC);
if (IS_ERR(req)) {
pr_err("%s: unable to allocate memory for in req\n",
__func__);
ret = PTR_ERR(req);
goto free_bulk_out;
}
req->complete = ccid_bulk_complete_in;
req->context = ccid_dev;
ccid_req_put(ccid_dev, &bulk_dev->tx_idle, req);
}
/* choose the descriptors and enable endpoints */
ret = config_ep_by_speed(cdev->gadget, f, ccid_dev->notify);
if (ret) {
ccid_dev->notify->desc = NULL;
pr_err("%s: config_ep_by_speed failed for ep#%s, err#%d\n",
__func__, ccid_dev->notify->name, ret);
goto free_bulk_in;
}
ret = usb_ep_enable(ccid_dev->notify);
if (ret) {
pr_err("%s: usb ep#%s enable failed, err#%d\n",
__func__, ccid_dev->notify->name, ret);
goto free_bulk_in;
}
ccid_dev->notify->driver_data = ccid_dev;
ret = config_ep_by_speed(cdev->gadget, f, ccid_dev->in);
if (ret) {
ccid_dev->in->desc = NULL;
pr_err("%s: config_ep_by_speed failed for ep#%s, err#%d\n",
__func__, ccid_dev->in->name, ret);
goto disable_ep_notify;
}
ret = usb_ep_enable(ccid_dev->in);
if (ret) {
pr_err("%s: usb ep#%s enable failed, err#%d\n",
__func__, ccid_dev->in->name, ret);
goto disable_ep_notify;
}
ret = config_ep_by_speed(cdev->gadget, f, ccid_dev->out);
if (ret) {
ccid_dev->out->desc = NULL;
pr_err("%s: config_ep_by_speed failed for ep#%s, err#%d\n",
__func__, ccid_dev->out->name, ret);
goto disable_ep_in;
}
ret = usb_ep_enable(ccid_dev->out);
if (ret) {
pr_err("%s: usb ep#%s enable failed, err#%d\n",
__func__, ccid_dev->out->name, ret);
goto disable_ep_in;
}
ccid_dev->dtr_state = 1;
atomic_set(&ccid_dev->online, 1);
return ret;
disable_ep_in:
usb_ep_disable(ccid_dev->in);
disable_ep_notify:
usb_ep_disable(ccid_dev->notify);
ccid_dev->notify->driver_data = NULL;
free_bulk_in:
while ((req = ccid_req_get(ccid_dev, &bulk_dev->tx_idle)))
ccid_request_free(req, ccid_dev->in);
free_bulk_out:
ccid_request_free(bulk_dev->rx_req, ccid_dev->out);
free_notify:
ccid_request_free(ccid_dev->notify_req, ccid_dev->notify);
return ret;
}
static void ccid_function_unbind(struct usb_configuration *c,
struct usb_function *f)
{
if (gadget_is_dualspeed(c->cdev->gadget))
usb_free_descriptors(f->hs_descriptors);
usb_free_descriptors(f->fs_descriptors);
}
static int ccid_function_bind(struct usb_configuration *c,
struct usb_function *f)
{
struct f_ccid *ccid_dev = func_to_ccid(f);
struct usb_ep *ep;
struct usb_composite_dev *cdev = c->cdev;
int ret = -ENODEV;
ccid_dev->ifc_id = usb_interface_id(c, f);
if (ccid_dev->ifc_id < 0) {
pr_err("%s: unable to allocate ifc id, err:%d",
__func__, ccid_dev->ifc_id);
return ccid_dev->ifc_id;
}
ccid_interface_desc.bInterfaceNumber = ccid_dev->ifc_id;
ep = usb_ep_autoconfig(cdev->gadget, &ccid_fs_notify_desc);
if (!ep) {
pr_err("%s: usb epnotify autoconfig failed\n", __func__);
return -ENODEV;
}
ccid_dev->notify = ep;
ep->driver_data = cdev;
ep = usb_ep_autoconfig(cdev->gadget, &ccid_fs_in_desc);
if (!ep) {
pr_err("%s: usb epin autoconfig failed\n", __func__);
ret = -ENODEV;
goto ep_auto_in_fail;
}
ccid_dev->in = ep;
ep->driver_data = cdev;
ep = usb_ep_autoconfig(cdev->gadget, &ccid_fs_out_desc);
if (!ep) {
pr_err("%s: usb epout autoconfig failed\n", __func__);
ret = -ENODEV;
goto ep_auto_out_fail;
}
ccid_dev->out = ep;
ep->driver_data = cdev;
f->fs_descriptors = usb_copy_descriptors(ccid_fs_descs);
if (!f->fs_descriptors)
goto ep_auto_out_fail;
if (gadget_is_dualspeed(cdev->gadget)) {
ccid_hs_in_desc.bEndpointAddress =
ccid_fs_in_desc.bEndpointAddress;
ccid_hs_out_desc.bEndpointAddress =
ccid_fs_out_desc.bEndpointAddress;
ccid_hs_notify_desc.bEndpointAddress =
ccid_fs_notify_desc.bEndpointAddress;
/* copy descriptors, and track endpoint copies */
f->hs_descriptors = usb_copy_descriptors(ccid_hs_descs);
if (!f->hs_descriptors)
goto ep_auto_out_fail;
}
pr_debug("%s: CCID %s Speed, IN:%s OUT:%s\n", __func__,
gadget_is_dualspeed(cdev->gadget) ? "dual" : "full",
ccid_dev->in->name, ccid_dev->out->name);
return 0;
ep_auto_out_fail:
ccid_dev->out->driver_data = NULL;
ccid_dev->out = NULL;
ep_auto_in_fail:
ccid_dev->in->driver_data = NULL;
ccid_dev->in = NULL;
return ret;
}
static int ccid_bulk_open(struct inode *ip, struct file *fp)
{
struct f_ccid *ccid_dev = _ccid_dev;
struct ccid_bulk_dev *bulk_dev = &ccid_dev->bulk_dev;
unsigned long flags;
pr_debug("ccid_bulk_open\n");
if (!atomic_read(&ccid_dev->online)) {
pr_debug("%s: USB cable not connected\n", __func__);
return -ENODEV;
}
if (atomic_read(&bulk_dev->opened)) {
pr_debug("%s: bulk device is already opened\n", __func__);
return -EBUSY;
}
atomic_set(&bulk_dev->opened, 1);
/* clear the error latch */
atomic_set(&bulk_dev->error, 0);
spin_lock_irqsave(&ccid_dev->lock, flags);
fp->private_data = ccid_dev;
spin_unlock_irqrestore(&ccid_dev->lock, flags);
return 0;
}
static int ccid_bulk_release(struct inode *ip, struct file *fp)
{
struct f_ccid *ccid_dev = fp->private_data;
struct ccid_bulk_dev *bulk_dev = &ccid_dev->bulk_dev;
pr_debug("ccid_bulk_release\n");
atomic_set(&bulk_dev->opened, 0);
return 0;
}
static ssize_t ccid_bulk_read(struct file *fp, char __user *buf,
size_t count, loff_t *pos)
{
struct f_ccid *ccid_dev = fp->private_data;
struct ccid_bulk_dev *bulk_dev = &ccid_dev->bulk_dev;
struct usb_request *req;
int r = count, xfer;
int ret;
unsigned long flags;
pr_debug("ccid_bulk_read(%zu)\n", count);
if (count > BULK_OUT_BUFFER_SIZE) {
pr_err("%s: max_buffer_size:%zu given_pkt_size:%zu\n",
__func__, BULK_OUT_BUFFER_SIZE, count);
return -ENOMEM;
}
if (atomic_read(&bulk_dev->error)) {
r = -EIO;
pr_err("%s bulk_dev_error\n", __func__);
goto done;
}
requeue_req:
spin_lock_irqsave(&ccid_dev->lock, flags);
if (!atomic_read(&ccid_dev->online)) {
pr_debug("%s: USB cable not connected\n", __func__);
return -ENODEV;
}
/* queue a request */
req = bulk_dev->rx_req;
req->length = count;
bulk_dev->rx_done = 0;
spin_unlock_irqrestore(&ccid_dev->lock, flags);
ret = usb_ep_queue(ccid_dev->out, req, GFP_KERNEL);
if (ret < 0) {
r = -EIO;
pr_err("%s usb ep queue failed\n", __func__);
atomic_set(&bulk_dev->error, 1);
goto done;
}
/* wait for a request to complete */
ret = wait_event_interruptible(bulk_dev->read_wq, bulk_dev->rx_done ||
atomic_read(&bulk_dev->error) ||
!atomic_read(&ccid_dev->online));
if (ret < 0) {
atomic_set(&bulk_dev->error, 1);
r = ret;
usb_ep_dequeue(ccid_dev->out, req);
goto done;
}
if (!atomic_read(&bulk_dev->error)) {
spin_lock_irqsave(&ccid_dev->lock, flags);
if (!atomic_read(&ccid_dev->online)) {
spin_unlock_irqrestore(&ccid_dev->lock, flags);
pr_debug("%s: USB cable not connected\n", __func__);
r = -ENODEV;
goto done;
}
/* If we got a 0-len packet, throw it back and try again. */
if (req->actual == 0) {
spin_unlock_irqrestore(&ccid_dev->lock, flags);
goto requeue_req;
}
xfer = (req->actual < count) ? req->actual : count;
atomic_set(&bulk_dev->rx_req_busy, 1);
spin_unlock_irqrestore(&ccid_dev->lock, flags);
if (copy_to_user(buf, req->buf, xfer))
r = -EFAULT;
spin_lock_irqsave(&ccid_dev->lock, flags);
atomic_set(&bulk_dev->rx_req_busy, 0);
if (!atomic_read(&ccid_dev->online)) {
ccid_request_free(bulk_dev->rx_req, ccid_dev->out);
spin_unlock_irqrestore(&ccid_dev->lock, flags);
pr_debug("%s: USB cable not connected\n", __func__);
r = -ENODEV;
goto done;
} else {
r = xfer;
}
spin_unlock_irqrestore(&ccid_dev->lock, flags);
} else {
r = -EIO;
}
done:
pr_debug("ccid_bulk_read returning %d\n", r);
return r;
}
static ssize_t ccid_bulk_write(struct file *fp, const char __user *buf,
size_t count, loff_t *pos)
{
struct f_ccid *ccid_dev = fp->private_data;
struct ccid_bulk_dev *bulk_dev = &ccid_dev->bulk_dev;
struct usb_request *req = 0;
int r = count;
int ret;
unsigned long flags;
pr_debug("ccid_bulk_write(%zu)\n", count);
if (!atomic_read(&ccid_dev->online)) {
pr_debug("%s: USB cable not connected\n", __func__);
return -ENODEV;
}
if (!count) {
pr_err("%s: zero length ctrl pkt\n", __func__);
return -ENODEV;
}
if (count > BULK_IN_BUFFER_SIZE) {
pr_err("%s: max_buffer_size:%zu given_pkt_size:%zu\n",
__func__, BULK_IN_BUFFER_SIZE, count);
return -ENOMEM;
}
/* get an idle tx request to use */
ret = wait_event_interruptible(bulk_dev->write_wq,
((req = ccid_req_get(ccid_dev, &bulk_dev->tx_idle)) ||
atomic_read(&bulk_dev->error)));
if (ret < 0) {
r = ret;
goto done;
}
if (atomic_read(&bulk_dev->error)) {
pr_err(" %s dev->error\n", __func__);
r = -EIO;
goto done;
}
if (copy_from_user(req->buf, buf, count)) {
if (!atomic_read(&ccid_dev->online)) {
pr_debug("%s: USB cable not connected\n",
__func__);
ccid_request_free(req, ccid_dev->in);
r = -ENODEV;
} else {
ccid_req_put(ccid_dev, &bulk_dev->tx_idle, req);
r = -EFAULT;
}
goto done;
}
req->length = count;
ret = usb_ep_queue(ccid_dev->in, req, GFP_KERNEL);
if (ret < 0) {
pr_debug("ccid_bulk_write: xfer error %d\n", ret);
atomic_set(&bulk_dev->error, 1);
ccid_req_put(ccid_dev, &bulk_dev->tx_idle, req);
r = -EIO;
spin_lock_irqsave(&ccid_dev->lock, flags);
if (!atomic_read(&ccid_dev->online)) {
spin_unlock_irqrestore(&ccid_dev->lock, flags);
pr_debug("%s: USB cable not connected\n",
__func__);
while ((req = ccid_req_get(ccid_dev,
&bulk_dev->tx_idle)))
ccid_request_free(req, ccid_dev->in);
r = -ENODEV;
}
spin_unlock_irqrestore(&ccid_dev->lock, flags);
goto done;
}
done:
pr_debug("ccid_bulk_write returning %d\n", r);
return r;
}
static const struct file_operations ccid_bulk_fops = {
.owner = THIS_MODULE,
.read = ccid_bulk_read,
.write = ccid_bulk_write,
.open = ccid_bulk_open,
.release = ccid_bulk_release,
};
static struct miscdevice ccid_bulk_device = {
.minor = MISC_DYNAMIC_MINOR,
.name = "ccid_bulk",
.fops = &ccid_bulk_fops,
};
static int ccid_bulk_device_init(struct f_ccid *dev)
{
int ret;
struct ccid_bulk_dev *bulk_dev = &dev->bulk_dev;
init_waitqueue_head(&bulk_dev->read_wq);
init_waitqueue_head(&bulk_dev->write_wq);
INIT_LIST_HEAD(&bulk_dev->tx_idle);
ret = misc_register(&ccid_bulk_device);
if (ret) {
pr_err("%s: failed to register misc device\n", __func__);
return ret;
}
return 0;
}
static int ccid_ctrl_open(struct inode *inode, struct file *fp)
{
struct f_ccid *ccid_dev = _ccid_dev;
struct ccid_ctrl_dev *ctrl_dev = &ccid_dev->ctrl_dev;
unsigned long flags;
if (!atomic_read(&ccid_dev->online)) {
pr_debug("%s: USB cable not connected\n", __func__);
return -ENODEV;
}
if (atomic_read(&ctrl_dev->opened)) {
pr_debug("%s: ctrl device is already opened\n", __func__);
return -EBUSY;
}
atomic_set(&ctrl_dev->opened, 1);
spin_lock_irqsave(&ccid_dev->lock, flags);
fp->private_data = ccid_dev;
spin_unlock_irqrestore(&ccid_dev->lock, flags);
return 0;
}
static int ccid_ctrl_release(struct inode *inode, struct file *fp)
{
struct f_ccid *ccid_dev = fp->private_data;
struct ccid_ctrl_dev *ctrl_dev = &ccid_dev->ctrl_dev;
atomic_set(&ctrl_dev->opened, 0);
return 0;
}
static ssize_t ccid_ctrl_read(struct file *fp, char __user *buf,
size_t count, loff_t *ppos)
{
struct f_ccid *ccid_dev = fp->private_data;
struct ccid_ctrl_dev *ctrl_dev = &ccid_dev->ctrl_dev;
int ret = 0;
if (!atomic_read(&ccid_dev->online)) {
pr_debug("%s: USB cable not connected\n", __func__);
return -ENODEV;
}
if (count > CTRL_BUF_SIZE)
count = CTRL_BUF_SIZE;
ret = wait_event_interruptible(ctrl_dev->tx_wait_q,
ctrl_dev->tx_ctrl_done);
if (ret < 0)
return ret;
ctrl_dev->tx_ctrl_done = 0;
if (!atomic_read(&ccid_dev->online)) {
pr_debug("%s: USB cable not connected\n", __func__);
return -ENODEV;
}
ret = copy_to_user(buf, ctrl_dev->buf, count);
if (ret)
return -EFAULT;
return count;
}
static long
ccid_ctrl_ioctl(struct file *fp, unsigned cmd, u_long arg)
{
struct f_ccid *ccid_dev = fp->private_data;
struct usb_request *req = ccid_dev->notify_req;
struct usb_ccid_notification *ccid_notify = req->buf;
void __user *argp = (void __user *)arg;
int ret = 0;
switch (cmd) {
case CCID_NOTIFY_CARD:
if (copy_from_user(ccid_notify, argp,
sizeof(struct usb_ccid_notification)))
return -EFAULT;
req->length = 2;
break;
case CCID_NOTIFY_HWERROR:
if (copy_from_user(ccid_notify, argp,
sizeof(struct usb_ccid_notification)))
return -EFAULT;
req->length = 4;
break;
case CCID_READ_DTR:
if (copy_to_user((int *)arg, &ccid_dev->dtr_state, sizeof(int)))
return -EFAULT;
return 0;
}
ret = usb_ep_queue(ccid_dev->notify, ccid_dev->notify_req, GFP_KERNEL);
if (ret < 0) {
pr_err("ccid notify ep enqueue error %d\n", ret);
return ret;
}
return 0;
}
static const struct file_operations ccid_ctrl_fops = {
.owner = THIS_MODULE,
.open = ccid_ctrl_open,
.release = ccid_ctrl_release,
.read = ccid_ctrl_read,
.unlocked_ioctl = ccid_ctrl_ioctl,
};
static struct miscdevice ccid_ctrl_device = {
.minor = MISC_DYNAMIC_MINOR,
.name = "ccid_ctrl",
.fops = &ccid_ctrl_fops,
};
static int ccid_ctrl_device_init(struct f_ccid *dev)
{
int ret;
struct ccid_ctrl_dev *ctrl_dev = &dev->ctrl_dev;
INIT_LIST_HEAD(&ctrl_dev->tx_q);
init_waitqueue_head(&ctrl_dev->tx_wait_q);
ret = misc_register(&ccid_ctrl_device);
if (ret) {
pr_err("%s: failed to register misc device\n", __func__);
return ret;
}
return 0;
}
static int ccid_bind_config(struct usb_configuration *c)
{
struct f_ccid *ccid_dev = _ccid_dev;
pr_debug("ccid_bind_config\n");
ccid_dev->cdev = c->cdev;
ccid_dev->function.name = FUNCTION_NAME;
ccid_dev->function.fs_descriptors = ccid_fs_descs;
ccid_dev->function.hs_descriptors = ccid_hs_descs;
ccid_dev->function.bind = ccid_function_bind;
ccid_dev->function.unbind = ccid_function_unbind;
ccid_dev->function.set_alt = ccid_function_set_alt;
ccid_dev->function.setup = ccid_function_setup;
ccid_dev->function.disable = ccid_function_disable;
return usb_add_function(c, &ccid_dev->function);
}
static int ccid_setup(void)
{
struct f_ccid *ccid_dev;
int ret;
ccid_dev = kzalloc(sizeof(*ccid_dev), GFP_KERNEL);
if (!ccid_dev)
return -ENOMEM;
_ccid_dev = ccid_dev;
spin_lock_init(&ccid_dev->lock);
ret = ccid_ctrl_device_init(ccid_dev);
if (ret) {
pr_err("%s: ccid_ctrl_device_init failed, err:%d\n",
__func__, ret);
goto err_ctrl_init;
}
ret = ccid_bulk_device_init(ccid_dev);
if (ret) {
pr_err("%s: ccid_bulk_device_init failed, err:%d\n",
__func__, ret);
goto err_bulk_init;
}
return 0;
err_bulk_init:
misc_deregister(&ccid_ctrl_device);
err_ctrl_init:
kfree(ccid_dev);
pr_err("ccid gadget driver failed to initialize\n");
return ret;
}
static void ccid_cleanup(void)
{
misc_deregister(&ccid_bulk_device);
misc_deregister(&ccid_ctrl_device);
kfree(_ccid_dev);
}

83
drivers/usb/gadget/function/f_ccid.h Normal file
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@ -0,0 +1,83 @@
/*
* Copyright (c) 2011, 2017 The Linux Foundation. All rights reserved.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*/
#ifndef __F_CCID_H
#define __F_CCID_H
#define PROTOCOL_TO 0x01
#define PROTOCOL_T1 0x02
#define ABDATA_SIZE 512
/* define for dwFeatures for Smart Card Device Class Descriptors */
/* No special characteristics */
#define CCID_FEATURES_NADA 0x00000000
/* Automatic parameter configuration based on ATR data */
#define CCID_FEATURES_AUTO_PCONF 0x00000002
/* Automatic activation of ICC on inserting */
#define CCID_FEATURES_AUTO_ACTIV 0x00000004
/* Automatic ICC voltage selection */
#define CCID_FEATURES_AUTO_VOLT 0x00000008
/* Automatic ICC clock frequency change */
#define CCID_FEATURES_AUTO_CLOCK 0x00000010
/* Automatic baud rate change */
#define CCID_FEATURES_AUTO_BAUD 0x00000020
/*Automatic parameters negotiation made by the CCID */
#define CCID_FEATURES_AUTO_PNEGO 0x00000040
/* Automatic PPS made by the CCID according to the active parameters */
#define CCID_FEATURES_AUTO_PPS 0x00000080
/* CCID can set ICC in clock stop mode */
#define CCID_FEATURES_ICCSTOP 0x00000100
/* NAD value other than 00 accepted (T=1 protocol in use) */
#define CCID_FEATURES_NAD 0x00000200
/* Automatic IFSD exchange as first exchange (T=1 protocol in use) */
#define CCID_FEATURES_AUTO_IFSD 0x00000400
/* TPDU level exchanges with CCID */
#define CCID_FEATURES_EXC_TPDU 0x00010000
/* Short APDU level exchange with CCID */
#define CCID_FEATURES_EXC_SAPDU 0x00020000
/* Short and Extended APDU level exchange with CCID */
#define CCID_FEATURES_EXC_APDU 0x00040000
/* USB Wake up signaling supported on card insertion and removal */
#define CCID_FEATURES_WAKEUP 0x00100000
#define CCID_NOTIFY_CARD _IOW('C', 1, struct usb_ccid_notification)
#define CCID_NOTIFY_HWERROR _IOW('C', 2, struct usb_ccid_notification)
#define CCID_READ_DTR _IOR('C', 3, int)
struct usb_ccid_notification {
unsigned char buf[4];
} __packed;
struct ccid_bulk_in_header {
unsigned char bMessageType;
unsigned long wLength;
unsigned char bSlot;
unsigned char bSeq;
unsigned char bStatus;
unsigned char bError;
unsigned char bSpecific;
unsigned char abData[ABDATA_SIZE];
unsigned char bSizeToSend;
} __packed;
struct ccid_bulk_out_header {
unsigned char bMessageType;
unsigned long wLength;
unsigned char bSlot;
unsigned char bSeq;
unsigned char bSpecific_0;
unsigned char bSpecific_1;
unsigned char bSpecific_2;
unsigned char APDU[ABDATA_SIZE];
} __packed;
#endif

112
include/linux/usb/ccid_desc.h Normal file
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@ -0,0 +1,112 @@
/*
* Copyright (c) 2011, 2017 The Linux Foundation. All rights reserved.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*/
#ifndef __LINUX_USB_CCID_DESC_H
#define __LINUX_USB_CCID_DESC_H
/*CCID specification version 1.10*/
#define CCID1_10 0x0110
#define SMART_CARD_DEVICE_CLASS 0x0B
/* Smart Card Device Class Descriptor Type */
#define CCID_DECRIPTOR_TYPE 0x21
/* Table 5.3-1 Summary of CCID Class Specific Request */
#define CCIDGENERICREQ_ABORT 0x01
#define CCIDGENERICREQ_GET_CLOCK_FREQUENCIES 0x02
#define CCIDGENERICREQ_GET_DATA_RATES 0x03
/* 6.1 Command Pipe, Bulk-OUT Messages */
#define PC_TO_RDR_ICCPOWERON 0x62
#define PC_TO_RDR_ICCPOWEROFF 0x63
#define PC_TO_RDR_GETSLOTSTATUS 0x65
#define PC_TO_RDR_XFRBLOCK 0x6F
#define PC_TO_RDR_GETPARAMETERS 0x6C
#define PC_TO_RDR_RESETPARAMETERS 0x6D
#define PC_TO_RDR_SETPARAMETERS 0x61
#define PC_TO_RDR_ESCAPE 0x6B
#define PC_TO_RDR_ICCCLOCK 0x6E
#define PC_TO_RDR_T0APDU 0x6A
#define PC_TO_RDR_SECURE 0x69
#define PC_TO_RDR_MECHANICAL 0x71
#define PC_TO_RDR_ABORT 0x72
#define PC_TO_RDR_SETDATARATEANDCLOCKFREQUENCY 0x73
/* 6.2 Response Pipe, Bulk-IN Messages */
#define RDR_TO_PC_DATABLOCK 0x80
#define RDR_TO_PC_SLOTSTATUS 0x81
#define RDR_TO_PC_PARAMETERS 0x82
#define RDR_TO_PC_ESCAPE 0x83
#define RDR_TO_PC_DATARATEANDCLOCKFREQUENCY 0x84
/* 6.3 Interrupt-IN Messages */
#define RDR_TO_PC_NOTIFYSLOTCHANGE 0x50
#define RDR_TO_PC_HARDWAREERROR 0x51
/* Table 6.2-2 Slot error register when bmCommandStatus = 1 */
#define CMD_ABORTED 0xFF
#define ICC_MUTE 0xFE
#define XFR_PARITY_ERROR 0xFD
#define XFR_OVERRUN 0xFC
#define HW_ERROR 0xFB
#define BAD_ATR_TS 0xF8
#define BAD_ATR_TCK 0xF7
#define ICC_PROTOCOL_NOT_SUPPORTED 0xF6
#define ICC_CLASS_NOT_SUPPORTED 0xF5
#define PROCEDURE_BYTE_CONFLICT 0xF4
#define DEACTIVATED_PROTOCOL 0xF3
#define BUSY_WITH_AUTO_SEQUENCE 0xF2
#define PIN_TIMEOUT 0xF0
#define PIN_CANCELLED 0xEF
#define CMD_SLOT_BUSY 0xE0
/* CCID rev 1.1, p.27 */
#define VOLTS_AUTO 0x00
#define VOLTS_5_0 0x01
#define VOLTS_3_0 0x02
#define VOLTS_1_8 0x03
/* 6.3.1 RDR_to_PC_NotifySlotChange */
#define ICC_NOT_PRESENT 0x00
#define ICC_PRESENT 0x01
#define ICC_CHANGE 0x02
#define ICC_INSERTED_EVENT (ICC_PRESENT+ICC_CHANGE)
/* Identifies the length of type of subordinate descriptors of a CCID device
* Table 5.1-1 Smart Card Device Class descriptors
*/
struct usb_ccid_class_descriptor {
unsigned char bLength;
unsigned char bDescriptorType;
unsigned short bcdCCID;
unsigned char bMaxSlotIndex;
unsigned char bVoltageSupport;
unsigned long dwProtocols;
unsigned long dwDefaultClock;
unsigned long dwMaximumClock;
unsigned char bNumClockSupported;
unsigned long dwDataRate;
unsigned long dwMaxDataRate;
unsigned char bNumDataRatesSupported;
unsigned long dwMaxIFSD;
unsigned long dwSynchProtocols;
unsigned long dwMechanical;
unsigned long dwFeatures;
unsigned long dwMaxCCIDMessageLength;
unsigned char bClassGetResponse;
unsigned char bClassEnvelope;
unsigned short wLcdLayout;
unsigned char bPINSupport;
unsigned char bMaxCCIDBusySlots;
} __packed;
#endif