USB: gadget: Add CCID function driver
This USB CCID function driver will be a transport layer between
userspace CCID component and the Windows Host. Data and control
commands from the Windows Host will be sent to the userspace component
and vice-versa.
Change-Id: I5f00f9802a57329d2c932bba740b286b98cb8e27
Signed-off-by: Chiranjeevi Velempati <cvelempa@codeaurora.org>
diff --git a/drivers/usb/gadget/f_ccid.c b/drivers/usb/gadget/f_ccid.c
new file mode 100644
index 0000000..a11f439
--- /dev/null
+++ b/drivers/usb/gadget/f_ccid.c
@@ -0,0 +1,1014 @@
+/*
+ * f_ccid.c -- CCID function Driver
+ *
+ * Copyright (c) 2011, Code Aurora Forum. 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/usb/android_composite.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_descs {
+ struct usb_endpoint_descriptor *in;
+ struct usb_endpoint_descriptor *out;
+ struct usb_endpoint_descriptor *notify;
+};
+
+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 descriptors */
+ struct ccid_descs fs;
+ struct ccid_descs hs;
+ /* usb eps*/
+ struct usb_ep *notify;
+ struct usb_ep *in;
+ struct usb_ep *out;
+ struct usb_endpoint_descriptor *in_desc;
+ struct usb_endpoint_descriptor *out_desc;
+ struct usb_endpoint_descriptor *notify_desc;
+ 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 = __constant_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 = __constant_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 = __constant_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 = __constant_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 = __constant_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 = __constant_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);
+ return 0;
+
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | CCIDGENERICREQ_GET_CLOCK_FREQUENCIES:
+ if (w_length > req->length)
+ goto invalid;
+ *(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:
+ if (w_length > req->length)
+ goto invalid;
+ *(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, 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, 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 */
+ ccid_dev->notify_desc = ep_choose(cdev->gadget,
+ ccid_dev->hs.notify,
+ ccid_dev->fs.notify);
+ ret = usb_ep_enable(ccid_dev->notify, ccid_dev->notify_desc);
+ 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;
+
+ ccid_dev->in_desc = ep_choose(cdev->gadget,
+ ccid_dev->hs.in, ccid_dev->fs.in);
+ ret = usb_ep_enable(ccid_dev->in, ccid_dev->in_desc);
+ if (ret) {
+ pr_err("%s: usb ep#%s enable failed, err#%d\n",
+ __func__, ccid_dev->in->name, ret);
+ goto disable_ep_notify;
+ }
+
+ ccid_dev->out_desc = ep_choose(cdev->gadget,
+ ccid_dev->hs.out, ccid_dev->fs.out);
+ ret = usb_ep_enable(ccid_dev->out, ccid_dev->out_desc);
+ 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->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->descriptors = usb_copy_descriptors(ccid_fs_descs);
+ if (!f->descriptors)
+ goto ep_auto_out_fail;
+
+ ccid_dev->fs.in = usb_find_endpoint(ccid_fs_descs,
+ f->descriptors,
+ &ccid_fs_in_desc);
+ ccid_dev->fs.out = usb_find_endpoint(ccid_fs_descs,
+ f->descriptors,
+ &ccid_fs_out_desc);
+ ccid_dev->fs.notify = usb_find_endpoint(ccid_fs_descs,
+ f->descriptors,
+ &ccid_fs_notify_desc);
+
+ 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;
+
+ ccid_dev->hs.in = usb_find_endpoint(ccid_hs_descs,
+ f->hs_descriptors, &ccid_hs_in_desc);
+ ccid_dev->hs.out = usb_find_endpoint(ccid_hs_descs,
+ f->hs_descriptors, &ccid_hs_out_desc);
+ ccid_dev->hs.notify = usb_find_endpoint(ccid_hs_descs,
+ f->hs_descriptors, &ccid_hs_notify_desc);
+ }
+
+ 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(%d)\n", count);
+
+ if (count > BULK_OUT_BUFFER_SIZE) {
+ pr_err("%s: max_buffer_size:%d given_pkt_size:%d\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;
+ }
+ 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(%d)\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:%d given_pkt_size:%d\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.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);
+}