usb: gps: Add a new usb function to support gps device
Adds windows sensor device functionality to a device.
gps usb functionality is implemented using qmi packets transferred
over smd channel to the modem, similarly to what currently done
in Rmnet. Therefore, the new gps function share the code that handles
transferring qmi packets over smd with Rmnet.
Change-Id: Ie9943bd3e0fdd3c7e0f94f7f9361620b06f397b5
Signed-off-by: Bar Weiner <bweiner@codeaurora.org>
diff --git a/drivers/usb/gadget/android.c b/drivers/usb/gadget/android.c
index d4bdf99..705600d 100644
--- a/drivers/usb/gadget/android.c
+++ b/drivers/usb/gadget/android.c
@@ -53,6 +53,7 @@
#include "f_rmnet_sdio.c"
#include "f_rmnet_smd_sdio.c"
#include "f_rmnet.c"
+#include "f_gps.c"
#ifdef CONFIG_SND_PCM
#include "f_audio_source.c"
#endif
@@ -731,6 +732,47 @@
.attributes = rmnet_function_attributes,
};
+static void gps_function_cleanup(struct android_usb_function *f)
+{
+ gps_cleanup();
+}
+
+static int gps_function_bind_config(struct android_usb_function *f,
+ struct usb_configuration *c)
+{
+ int err;
+ static int gps_initialized;
+
+ if (!gps_initialized) {
+ gps_initialized = 1;
+ err = gps_init_port();
+ if (err) {
+ pr_err("gps: Cannot init gps port");
+ return err;
+ }
+ }
+
+ err = gps_gport_setup();
+ if (err) {
+ pr_err("gps: Cannot setup transports");
+ return err;
+ }
+ err = gps_bind_config(c);
+ if (err) {
+ pr_err("Could not bind gps config\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static struct android_usb_function gps_function = {
+ .name = "gps",
+ .cleanup = gps_function_cleanup,
+ .bind_config = gps_function_bind_config,
+};
+
+
/* ecm transport string */
static char ecm_transports[MAX_XPORT_STR_LEN];
@@ -1783,6 +1825,7 @@
&rmnet_sdio_function,
&rmnet_smd_sdio_function,
&rmnet_function,
+ &gps_function,
&diag_function,
&qdss_function,
&serial_function,
diff --git a/drivers/usb/gadget/f_gps.c b/drivers/usb/gadget/f_gps.c
new file mode 100644
index 0000000..ef08fc5
--- /dev/null
+++ b/drivers/usb/gadget/f_gps.c
@@ -0,0 +1,780 @@
+/*
+ * Copyright (c) 2011-2013, 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/spinlock.h>
+
+#include <mach/usb_gadget_xport.h>
+
+#include "u_rmnet.h"
+#include "gadget_chips.h"
+
+#define GPS_NOTIFY_INTERVAL 5
+#define GPS_MAX_NOTIFY_SIZE 64
+
+
+#define ACM_CTRL_DTR (1 << 0)
+
+/* TODO: use separate structures for data and
+ * control paths
+ */
+struct f_gps {
+ struct grmnet port;
+ u8 port_num;
+ int ifc_id;
+ atomic_t online;
+ atomic_t ctrl_online;
+ struct usb_composite_dev *cdev;
+
+ spinlock_t lock;
+
+ /* usb eps */
+ struct usb_ep *notify;
+ struct usb_request *notify_req;
+
+ /* control info */
+ struct list_head cpkt_resp_q;
+ atomic_t notify_count;
+ unsigned long cpkts_len;
+};
+
+static struct gps_ports {
+ enum transport_type ctrl_xport;
+ struct f_gps *port;
+} gps_port;
+
+static struct usb_interface_descriptor gps_interface_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ .bInterfaceSubClass = USB_CLASS_VENDOR_SPEC,
+ .bInterfaceProtocol = USB_CLASS_VENDOR_SPEC,
+ /* .iInterface = DYNAMIC */
+};
+
+/* Full speed support */
+static struct usb_endpoint_descriptor gps_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(GPS_MAX_NOTIFY_SIZE),
+ .bInterval = 1 << GPS_NOTIFY_INTERVAL,
+};
+
+static struct usb_descriptor_header *gps_fs_function[] = {
+ (struct usb_descriptor_header *) &gps_interface_desc,
+ (struct usb_descriptor_header *) &gps_fs_notify_desc,
+ NULL,
+};
+
+/* High speed support */
+static struct usb_endpoint_descriptor gps_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(GPS_MAX_NOTIFY_SIZE),
+ .bInterval = GPS_NOTIFY_INTERVAL + 4,
+};
+
+static struct usb_descriptor_header *gps_hs_function[] = {
+ (struct usb_descriptor_header *) &gps_interface_desc,
+ (struct usb_descriptor_header *) &gps_hs_notify_desc,
+ NULL,
+};
+
+/* Super speed support */
+static struct usb_endpoint_descriptor gps_ss_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(GPS_MAX_NOTIFY_SIZE),
+ .bInterval = GPS_NOTIFY_INTERVAL + 4,
+};
+
+static struct usb_ss_ep_comp_descriptor gps_ss_notify_comp_desc = {
+ .bLength = sizeof gps_ss_notify_comp_desc,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ /* the following 3 values can be tweaked if necessary */
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+ .wBytesPerInterval = cpu_to_le16(GPS_MAX_NOTIFY_SIZE),
+};
+
+static struct usb_descriptor_header *gps_ss_function[] = {
+ (struct usb_descriptor_header *) &gps_interface_desc,
+ (struct usb_descriptor_header *) &gps_ss_notify_desc,
+ (struct usb_descriptor_header *) &gps_ss_notify_comp_desc,
+ NULL,
+};
+
+/* String descriptors */
+
+static struct usb_string gps_string_defs[] = {
+ [0].s = "GPS",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings gps_string_table = {
+ .language = 0x0409, /* en-us */
+ .strings = gps_string_defs,
+};
+
+static struct usb_gadget_strings *gps_strings[] = {
+ &gps_string_table,
+ NULL,
+};
+
+static void gps_ctrl_response_available(struct f_gps *dev);
+
+/* ------- misc functions --------------------*/
+
+static inline struct f_gps *func_to_gps(struct usb_function *f)
+{
+ return container_of(f, struct f_gps, port.func);
+}
+
+static inline struct f_gps *port_to_gps(struct grmnet *r)
+{
+ return container_of(r, struct f_gps, port);
+}
+
+static struct usb_request *
+gps_alloc_req(struct usb_ep *ep, unsigned len, gfp_t flags)
+{
+ struct usb_request *req;
+
+ req = usb_ep_alloc_request(ep, flags);
+ if (!req)
+ return ERR_PTR(-ENOMEM);
+
+ req->buf = kmalloc(len, flags);
+ if (!req->buf) {
+ usb_ep_free_request(ep, req);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ req->length = len;
+
+ return req;
+}
+
+void gps_free_req(struct usb_ep *ep, struct usb_request *req)
+{
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+}
+
+static struct rmnet_ctrl_pkt *gps_alloc_ctrl_pkt(unsigned len, gfp_t flags)
+{
+ struct rmnet_ctrl_pkt *pkt;
+
+ pkt = kzalloc(sizeof(struct rmnet_ctrl_pkt), flags);
+ if (!pkt)
+ return ERR_PTR(-ENOMEM);
+
+ pkt->buf = kmalloc(len, flags);
+ if (!pkt->buf) {
+ kfree(pkt);
+ return ERR_PTR(-ENOMEM);
+ }
+ pkt->len = len;
+
+ return pkt;
+}
+
+static void gps_free_ctrl_pkt(struct rmnet_ctrl_pkt *pkt)
+{
+ kfree(pkt->buf);
+ kfree(pkt);
+}
+
+/* -------------------------------------------*/
+
+static int gps_gport_setup(void)
+{
+ u8 base;
+ int res;
+
+ res = gsmd_ctrl_setup(GPS_CTRL_CLIENT, 1, &base);
+ gps_port.port->port_num += base;
+ return res;
+}
+
+static int gport_ctrl_connect(struct f_gps *dev)
+{
+ return gsmd_ctrl_connect(&dev->port, dev->port_num);
+}
+
+static int gport_gps_disconnect(struct f_gps *dev)
+{
+ gsmd_ctrl_disconnect(&dev->port, dev->port_num);
+ return 0;
+}
+
+static void gps_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_gps *dev = func_to_gps(f);
+
+ pr_debug("%s: portno:%d\n", __func__, dev->port_num);
+
+ if (gadget_is_superspeed(c->cdev->gadget))
+ usb_free_descriptors(f->ss_descriptors);
+ if (gadget_is_dualspeed(c->cdev->gadget))
+ usb_free_descriptors(f->hs_descriptors);
+ usb_free_descriptors(f->descriptors);
+
+ gps_free_req(dev->notify, dev->notify_req);
+
+ kfree(f->name);
+}
+
+static void gps_purge_responses(struct f_gps *dev)
+{
+ unsigned long flags;
+ struct rmnet_ctrl_pkt *cpkt;
+
+ pr_debug("%s: port#%d\n", __func__, dev->port_num);
+
+ spin_lock_irqsave(&dev->lock, flags);
+ while (!list_empty(&dev->cpkt_resp_q)) {
+ cpkt = list_first_entry(&dev->cpkt_resp_q,
+ struct rmnet_ctrl_pkt, list);
+
+ list_del(&cpkt->list);
+ rmnet_free_ctrl_pkt(cpkt);
+ }
+ atomic_set(&dev->notify_count, 0);
+ spin_unlock_irqrestore(&dev->lock, flags);
+}
+
+static void gps_suspend(struct usb_function *f)
+{
+ struct f_gps *dev = func_to_gps(f);
+ gps_purge_responses(dev);
+
+}
+
+static void gps_disable(struct usb_function *f)
+{
+ struct f_gps *dev = func_to_gps(f);
+
+ usb_ep_disable(dev->notify);
+ dev->notify->driver_data = NULL;
+
+ atomic_set(&dev->online, 0);
+
+ gps_purge_responses(dev);
+
+ gport_gps_disconnect(dev);
+}
+
+static int
+gps_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
+{
+ struct f_gps *dev = func_to_gps(f);
+ struct usb_composite_dev *cdev = dev->cdev;
+ int ret;
+ struct list_head *cpkt;
+
+ pr_debug("%s:dev:%p\n", __func__, dev);
+
+ if (dev->notify->driver_data)
+ usb_ep_disable(dev->notify);
+
+ ret = config_ep_by_speed(cdev->gadget, f, dev->notify);
+ if (ret) {
+ dev->notify->desc = NULL;
+ ERROR(cdev, "config_ep_by_speed failes for ep %s, result %d\n",
+ dev->notify->name, ret);
+ return ret;
+ }
+ ret = usb_ep_enable(dev->notify);
+
+ if (ret) {
+ pr_err("%s: usb ep#%s enable failed, err#%d\n",
+ __func__, dev->notify->name, ret);
+ return ret;
+ }
+ dev->notify->driver_data = dev;
+
+ ret = gport_ctrl_connect(dev);
+
+ atomic_set(&dev->online, 1);
+
+ /* In case notifications were aborted, but there are pending control
+ packets in the response queue, re-add the notifications */
+ list_for_each(cpkt, &dev->cpkt_resp_q)
+ gps_ctrl_response_available(dev);
+
+ return ret;
+}
+
+static void gps_ctrl_response_available(struct f_gps *dev)
+{
+ struct usb_request *req = dev->notify_req;
+ struct usb_cdc_notification *event;
+ unsigned long flags;
+ int ret;
+ struct rmnet_ctrl_pkt *cpkt;
+
+ pr_debug("%s:dev:%p\n", __func__, dev);
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (!atomic_read(&dev->online) || !req || !req->buf) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return;
+ }
+
+ if (atomic_inc_return(&dev->notify_count) != 1) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return;
+ }
+
+ event = req->buf;
+ event->bmRequestType = USB_DIR_IN | USB_TYPE_CLASS
+ | USB_RECIP_INTERFACE;
+ event->bNotificationType = USB_CDC_NOTIFY_RESPONSE_AVAILABLE;
+ event->wValue = cpu_to_le16(0);
+ event->wIndex = cpu_to_le16(dev->ifc_id);
+ event->wLength = cpu_to_le16(0);
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ ret = usb_ep_queue(dev->notify, dev->notify_req, GFP_ATOMIC);
+ if (ret) {
+ spin_lock_irqsave(&dev->lock, flags);
+ if (!list_empty(&dev->cpkt_resp_q)) {
+ atomic_dec(&dev->notify_count);
+ cpkt = list_first_entry(&dev->cpkt_resp_q,
+ struct rmnet_ctrl_pkt, list);
+ list_del(&cpkt->list);
+ gps_free_ctrl_pkt(cpkt);
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+ pr_debug("ep enqueue error %d\n", ret);
+ }
+}
+
+static void gps_connect(struct grmnet *gr)
+{
+ struct f_gps *dev;
+
+ if (!gr) {
+ pr_err("%s: Invalid grmnet:%p\n", __func__, gr);
+ return;
+ }
+
+ dev = port_to_gps(gr);
+
+ atomic_set(&dev->ctrl_online, 1);
+}
+
+static void gps_disconnect(struct grmnet *gr)
+{
+ struct f_gps *dev;
+ struct usb_cdc_notification *event;
+ int status;
+
+ if (!gr) {
+ pr_err("%s: Invalid grmnet:%p\n", __func__, gr);
+ return;
+ }
+
+ dev = port_to_gps(gr);
+
+ atomic_set(&dev->ctrl_online, 0);
+
+ if (!atomic_read(&dev->online)) {
+ pr_debug("%s: nothing to do\n", __func__);
+ return;
+ }
+
+ usb_ep_fifo_flush(dev->notify);
+
+ event = dev->notify_req->buf;
+ event->bmRequestType = USB_DIR_IN | USB_TYPE_CLASS
+ | USB_RECIP_INTERFACE;
+ event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
+ event->wValue = cpu_to_le16(0);
+ event->wIndex = cpu_to_le16(dev->ifc_id);
+ event->wLength = cpu_to_le16(0);
+
+ status = usb_ep_queue(dev->notify, dev->notify_req, GFP_ATOMIC);
+ if (status < 0) {
+ if (!atomic_read(&dev->online))
+ return;
+ pr_err("%s: gps notify ep enqueue error %d\n",
+ __func__, status);
+ }
+
+ gps_purge_responses(dev);
+}
+
+static int
+gps_send_cpkt_response(void *gr, void *buf, size_t len)
+{
+ struct f_gps *dev;
+ struct rmnet_ctrl_pkt *cpkt;
+ unsigned long flags;
+
+ if (!gr || !buf) {
+ pr_err("%s: Invalid grmnet/buf, grmnet:%p buf:%p\n",
+ __func__, gr, buf);
+ return -ENODEV;
+ }
+ cpkt = gps_alloc_ctrl_pkt(len, GFP_ATOMIC);
+ if (IS_ERR(cpkt)) {
+ pr_err("%s: Unable to allocate ctrl pkt\n", __func__);
+ return -ENOMEM;
+ }
+ memcpy(cpkt->buf, buf, len);
+ cpkt->len = len;
+
+ dev = port_to_gps(gr);
+
+ pr_debug("%s: dev:%p\n", __func__, dev);
+
+ if (!atomic_read(&dev->online) || !atomic_read(&dev->ctrl_online)) {
+ gps_free_ctrl_pkt(cpkt);
+ return 0;
+ }
+
+ spin_lock_irqsave(&dev->lock, flags);
+ list_add_tail(&cpkt->list, &dev->cpkt_resp_q);
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ gps_ctrl_response_available(dev);
+
+ return 0;
+}
+
+static void
+gps_cmd_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_gps *dev = req->context;
+ struct usb_composite_dev *cdev;
+
+ if (!dev) {
+ pr_err("%s: dev is null\n", __func__);
+ return;
+ }
+
+ pr_debug("%s: dev:%p\n", __func__, dev);
+
+ cdev = dev->cdev;
+
+ if (dev->port.send_encap_cmd)
+ dev->port.send_encap_cmd(dev->port_num, req->buf, req->actual);
+}
+
+static void gps_notify_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct f_gps *dev = req->context;
+ int status = req->status;
+ unsigned long flags;
+ struct rmnet_ctrl_pkt *cpkt;
+
+ pr_debug("%s: dev:%p port#%d\n", __func__, dev, dev->port_num);
+
+ switch (status) {
+ case -ECONNRESET:
+ case -ESHUTDOWN:
+ /* connection gone */
+ atomic_set(&dev->notify_count, 0);
+ break;
+ default:
+ pr_err("gps notify ep error %d\n", status);
+ /* FALLTHROUGH */
+ case 0:
+ if (!atomic_read(&dev->ctrl_online))
+ break;
+
+ if (atomic_dec_and_test(&dev->notify_count))
+ break;
+
+ status = usb_ep_queue(dev->notify, req, GFP_ATOMIC);
+ if (status) {
+ spin_lock_irqsave(&dev->lock, flags);
+ if (!list_empty(&dev->cpkt_resp_q)) {
+ atomic_dec(&dev->notify_count);
+ cpkt = list_first_entry(&dev->cpkt_resp_q,
+ struct rmnet_ctrl_pkt, list);
+ list_del(&cpkt->list);
+ gps_free_ctrl_pkt(cpkt);
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+ pr_debug("ep enqueue error %d\n", status);
+ }
+ break;
+ }
+}
+
+static int
+gps_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
+{
+ struct f_gps *dev = func_to_gps(f);
+ struct usb_composite_dev *cdev = dev->cdev;
+ struct usb_request *req = cdev->req;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+ u16 w_value = le16_to_cpu(ctrl->wValue);
+ u16 w_length = le16_to_cpu(ctrl->wLength);
+ int ret = -EOPNOTSUPP;
+
+ pr_debug("%s:dev:%p\n", __func__, dev);
+
+ if (!atomic_read(&dev->online)) {
+ pr_debug("%s: usb cable is not connected\n", __func__);
+ return -ENOTCONN;
+ }
+
+ switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_SEND_ENCAPSULATED_COMMAND:
+ ret = w_length;
+ req->complete = gps_cmd_complete;
+ req->context = dev;
+ break;
+
+ case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_GET_ENCAPSULATED_RESPONSE:
+ if (w_value)
+ goto invalid;
+ else {
+ unsigned len;
+ struct rmnet_ctrl_pkt *cpkt;
+
+ spin_lock(&dev->lock);
+ if (list_empty(&dev->cpkt_resp_q)) {
+ pr_err("%s: ctrl resp queue empty", __func__);
+ spin_unlock(&dev->lock);
+ goto invalid;
+ }
+
+ cpkt = list_first_entry(&dev->cpkt_resp_q,
+ struct rmnet_ctrl_pkt, list);
+ list_del(&cpkt->list);
+ spin_unlock(&dev->lock);
+
+ len = min_t(unsigned, w_length, cpkt->len);
+ memcpy(req->buf, cpkt->buf, len);
+ ret = len;
+
+ gps_free_ctrl_pkt(cpkt);
+ }
+ break;
+ case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
+ | USB_CDC_REQ_SET_CONTROL_LINE_STATE:
+ if (dev->port.notify_modem)
+ dev->port.notify_modem(&dev->port,
+ dev->port_num, w_value);
+ ret = 0;
+
+ break;
+ default:
+
+invalid:
+ DBG(cdev, "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) {
+ VDBG(cdev, "gps req%02x.%02x v%04x i%04x l%d\n",
+ ctrl->bRequestType, ctrl->bRequest,
+ w_value, w_index, w_length);
+ req->zero = (ret < w_length);
+ req->length = ret;
+ ret = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
+ if (ret < 0)
+ ERROR(cdev, "gps ep0 enqueue err %d\n", ret);
+ }
+
+ return ret;
+}
+
+static int gps_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_gps *dev = func_to_gps(f);
+ struct usb_ep *ep;
+ struct usb_composite_dev *cdev = c->cdev;
+ int ret = -ENODEV;
+
+ dev->ifc_id = usb_interface_id(c, f);
+ if (dev->ifc_id < 0) {
+ pr_err("%s: unable to allocate ifc id, err:%d",
+ __func__, dev->ifc_id);
+ return dev->ifc_id;
+ }
+ gps_interface_desc.bInterfaceNumber = dev->ifc_id;
+
+ dev->port.in = NULL;
+ dev->port.out = NULL;
+
+ ep = usb_ep_autoconfig(cdev->gadget, &gps_fs_notify_desc);
+ if (!ep) {
+ pr_err("%s: usb epnotify autoconfig failed\n", __func__);
+ ret = -ENODEV;
+ goto ep_auto_notify_fail;
+ }
+ dev->notify = ep;
+ ep->driver_data = cdev;
+
+ dev->notify_req = gps_alloc_req(ep,
+ sizeof(struct usb_cdc_notification),
+ GFP_KERNEL);
+ if (IS_ERR(dev->notify_req)) {
+ pr_err("%s: unable to allocate memory for notify req\n",
+ __func__);
+ ret = -ENOMEM;
+ goto ep_notify_alloc_fail;
+ }
+
+ dev->notify_req->complete = gps_notify_complete;
+ dev->notify_req->context = dev;
+
+ ret = -ENOMEM;
+ f->descriptors = usb_copy_descriptors(gps_fs_function);
+
+ if (!f->descriptors)
+ goto fail;
+
+ if (gadget_is_dualspeed(cdev->gadget)) {
+ gps_hs_notify_desc.bEndpointAddress =
+ gps_fs_notify_desc.bEndpointAddress;
+
+ /* copy descriptors, and track endpoint copies */
+ f->hs_descriptors = usb_copy_descriptors(gps_hs_function);
+
+ if (!f->hs_descriptors)
+ goto fail;
+ }
+
+ if (gadget_is_superspeed(cdev->gadget)) {
+ gps_ss_notify_desc.bEndpointAddress =
+ gps_fs_notify_desc.bEndpointAddress;
+
+ /* copy descriptors, and track endpoint copies */
+ f->ss_descriptors = usb_copy_descriptors(gps_ss_function);
+
+ if (!f->ss_descriptors)
+ goto fail;
+ }
+
+ pr_info("%s: GPS(%d) %s Speed\n",
+ __func__, dev->port_num,
+ gadget_is_dualspeed(cdev->gadget) ? "dual" : "full");
+
+ return 0;
+
+fail:
+ if (f->ss_descriptors)
+ usb_free_descriptors(f->ss_descriptors);
+ if (f->hs_descriptors)
+ usb_free_descriptors(f->hs_descriptors);
+ if (f->descriptors)
+ usb_free_descriptors(f->descriptors);
+ if (dev->notify_req)
+ gps_free_req(dev->notify, dev->notify_req);
+ep_notify_alloc_fail:
+ dev->notify->driver_data = NULL;
+ dev->notify = NULL;
+ep_auto_notify_fail:
+ return ret;
+}
+
+static int gps_bind_config(struct usb_configuration *c)
+{
+ int status;
+ struct f_gps *dev;
+ struct usb_function *f;
+ unsigned long flags;
+
+ pr_debug("%s: usb config:%p\n", __func__, c);
+
+ if (gps_string_defs[0].id == 0) {
+ status = usb_string_id(c->cdev);
+ if (status < 0) {
+ pr_err("%s: failed to get string id, err:%d\n",
+ __func__, status);
+ return status;
+ }
+ gps_string_defs[0].id = status;
+ }
+
+ dev = gps_port.port;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ dev->cdev = c->cdev;
+ f = &dev->port.func;
+ f->name = kasprintf(GFP_ATOMIC, "gps");
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (!f->name) {
+ pr_err("%s: cannot allocate memory for name\n", __func__);
+ return -ENOMEM;
+ }
+
+ f->strings = gps_strings;
+ f->bind = gps_bind;
+ f->unbind = gps_unbind;
+ f->disable = gps_disable;
+ f->set_alt = gps_set_alt;
+ f->setup = gps_setup;
+ f->suspend = gps_suspend;
+ dev->port.send_cpkt_response = gps_send_cpkt_response;
+ dev->port.disconnect = gps_disconnect;
+ dev->port.connect = gps_connect;
+
+ status = usb_add_function(c, f);
+ if (status) {
+ pr_err("%s: usb add function failed: %d\n",
+ __func__, status);
+ kfree(f->name);
+ return status;
+ }
+
+ pr_debug("%s: complete\n", __func__);
+
+ return status;
+}
+
+static void gps_cleanup(void)
+{
+ kfree(gps_port.port);
+}
+
+static int gps_init_port(void)
+{
+ struct f_gps *dev;
+
+ dev = kzalloc(sizeof(struct f_gps), GFP_KERNEL);
+ if (!dev) {
+ pr_err("%s: Unable to allocate gps device\n", __func__);
+ return -ENOMEM;
+ }
+
+ spin_lock_init(&dev->lock);
+ INIT_LIST_HEAD(&dev->cpkt_resp_q);
+ dev->port_num = 0;
+
+ gps_port.port = dev;
+ gps_port.ctrl_xport = USB_GADGET_XPORT_SMD;
+
+ return 0;
+}
diff --git a/drivers/usb/gadget/u_rmnet.h b/drivers/usb/gadget/u_rmnet.h
index 98307d3..06471a4 100644
--- a/drivers/usb/gadget/u_rmnet.h
+++ b/drivers/usb/gadget/u_rmnet.h
@@ -48,6 +48,7 @@
enum ctrl_client {
FRMNET_CTRL_CLIENT,
+ GPS_CTRL_CLIENT,
NR_CTRL_CLIENTS
};
diff --git a/drivers/usb/gadget/u_rmnet_ctrl_smd.c b/drivers/usb/gadget/u_rmnet_ctrl_smd.c
index 9b824bb..caea4ef 100644
--- a/drivers/usb/gadget/u_rmnet_ctrl_smd.c
+++ b/drivers/usb/gadget/u_rmnet_ctrl_smd.c
@@ -28,6 +28,7 @@
#define MAX_CTRL_PORT (MAX_CTRL_PER_CLIENT * NR_CTRL_CLIENTS)
static char *ctrl_names[NR_CTRL_CLIENTS][MAX_CTRL_PER_CLIENT] = {
{"DATA40_CNTL", "DATA39_CNTL", "DATA38_CNTL"},
+ {"DATA39_CNTL"},
};
static struct workqueue_struct *grmnet_ctrl_wq;