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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/sched.h>
#include <linux/kthread.h>
#include <linux/usb/cdc.h>
#include <linux/wait.h>
#include <linux/if_ether.h>
#include <linux/pm_runtime.h>
#include "gdm_usb.h"
#include "gdm_lte.h"
#include "hci.h"
#include "hci_packet.h"
#include "gdm_endian.h"
#define USB_DEVICE_CDC_DATA(vid, pid) \
.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
USB_DEVICE_ID_MATCH_INT_CLASS | \
USB_DEVICE_ID_MATCH_INT_SUBCLASS,\
.idVendor = vid,\
.idProduct = pid,\
.bInterfaceClass = USB_CLASS_COMM,\
.bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET
#define USB_DEVICE_MASS_DATA(vid, pid) \
.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
USB_DEVICE_ID_MATCH_INT_INFO,\
.idVendor = vid,\
.idProduct = pid,\
.bInterfaceSubClass = USB_SC_SCSI, \
.bInterfaceClass = USB_CLASS_MASS_STORAGE,\
.bInterfaceProtocol = USB_PR_BULK
static const struct usb_device_id id_table[] = {
{ USB_DEVICE_CDC_DATA(VID_GCT, PID_GDM7240) }, /* GCT GDM7240 */
{ USB_DEVICE_CDC_DATA(VID_GCT, PID_GDM7243) }, /* GCT GDM7243 */
{ }
};
MODULE_DEVICE_TABLE(usb, id_table);
static void do_tx(struct work_struct *work);
static void do_rx(struct work_struct *work);
static int gdm_usb_recv(void *priv_dev,
int (*cb)(void *cb_data,
void *data, int len, int context),
void *cb_data,
int context);
static int request_mac_address(struct lte_udev *udev)
{
u8 buf[16] = {0,};
struct hci_packet *hci = (struct hci_packet *)buf;
struct usb_device *usbdev = udev->usbdev;
int actual;
int ret = -1;
hci->cmd_evt = gdm_cpu_to_dev16(udev->gdm_ed, LTE_GET_INFORMATION);
hci->len = gdm_cpu_to_dev16(udev->gdm_ed, 1);
hci->data[0] = MAC_ADDRESS;
ret = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 2), buf, 5,
&actual, 1000);
udev->request_mac_addr = 1;
return ret;
}
static struct usb_tx *alloc_tx_struct(int len)
{
struct usb_tx *t = NULL;
int ret = 0;
t = kzalloc(sizeof(*t), GFP_ATOMIC);
if (!t) {
ret = -ENOMEM;
goto out;
}
t->urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!(len % 512))
len++;
t->buf = kmalloc(len, GFP_ATOMIC);
if (!t->urb || !t->buf) {
ret = -ENOMEM;
goto out;
}
out:
if (ret < 0) {
if (t) {
usb_free_urb(t->urb);
kfree(t->buf);
kfree(t);
}
return NULL;
}
return t;
}
static struct usb_tx_sdu *alloc_tx_sdu_struct(void)
{
struct usb_tx_sdu *t_sdu;
t_sdu = kzalloc(sizeof(*t_sdu), GFP_KERNEL);
if (!t_sdu)
return NULL;
t_sdu->buf = kmalloc(SDU_BUF_SIZE, GFP_KERNEL);
if (!t_sdu->buf) {
kfree(t_sdu);
return NULL;
}
return t_sdu;
}
static void free_tx_struct(struct usb_tx *t)
{
if (t) {
usb_free_urb(t->urb);
kfree(t->buf);
kfree(t);
}
}
static void free_tx_sdu_struct(struct usb_tx_sdu *t_sdu)
{
if (t_sdu) {
kfree(t_sdu->buf);
kfree(t_sdu);
}
}
static struct usb_tx_sdu *get_tx_sdu_struct(struct tx_cxt *tx, int *no_spc)
{
struct usb_tx_sdu *t_sdu;
if (list_empty(&tx->free_list))
return NULL;
t_sdu = list_entry(tx->free_list.next, struct usb_tx_sdu, list);
list_del(&t_sdu->list);
tx->avail_count--;
*no_spc = list_empty(&tx->free_list) ? 1 : 0;
return t_sdu;
}
static void put_tx_struct(struct tx_cxt *tx, struct usb_tx_sdu *t_sdu)
{
list_add_tail(&t_sdu->list, &tx->free_list);
tx->avail_count++;
}
static struct usb_rx *alloc_rx_struct(void)
{
struct usb_rx *r = NULL;
int ret = 0;
r = kmalloc(sizeof(*r), GFP_KERNEL);
if (!r) {
ret = -ENOMEM;
goto out;
}
r->urb = usb_alloc_urb(0, GFP_KERNEL);
r->buf = kmalloc(RX_BUF_SIZE, GFP_KERNEL);
if (!r->urb || !r->buf) {
ret = -ENOMEM;
goto out;
}
out:
if (ret < 0) {
if (r) {
usb_free_urb(r->urb);
kfree(r->buf);
kfree(r);
}
return NULL;
}
return r;
}
static void free_rx_struct(struct usb_rx *r)
{
if (r) {
usb_free_urb(r->urb);
kfree(r->buf);
kfree(r);
}
}
static struct usb_rx *get_rx_struct(struct rx_cxt *rx, int *no_spc)
{
struct usb_rx *r;
unsigned long flags;
spin_lock_irqsave(&rx->rx_lock, flags);
if (list_empty(&rx->free_list)) {
spin_unlock_irqrestore(&rx->rx_lock, flags);
return NULL;
}
r = list_entry(rx->free_list.next, struct usb_rx, free_list);
list_del(&r->free_list);
rx->avail_count--;
*no_spc = list_empty(&rx->free_list) ? 1 : 0;
spin_unlock_irqrestore(&rx->rx_lock, flags);
return r;
}
static void put_rx_struct(struct rx_cxt *rx, struct usb_rx *r)
{
unsigned long flags;
spin_lock_irqsave(&rx->rx_lock, flags);
list_add_tail(&r->free_list, &rx->free_list);
rx->avail_count++;
spin_unlock_irqrestore(&rx->rx_lock, flags);
}
static void release_usb(struct lte_udev *udev)
{
struct rx_cxt *rx = &udev->rx;
struct tx_cxt *tx = &udev->tx;
struct usb_tx *t, *t_next;
struct usb_rx *r, *r_next;
struct usb_tx_sdu *t_sdu, *t_sdu_next;
unsigned long flags;
spin_lock_irqsave(&tx->lock, flags);
list_for_each_entry_safe(t_sdu, t_sdu_next, &tx->sdu_list, list) {
list_del(&t_sdu->list);
free_tx_sdu_struct(t_sdu);
}
list_for_each_entry_safe(t, t_next, &tx->hci_list, list) {
list_del(&t->list);
free_tx_struct(t);
}
list_for_each_entry_safe(t_sdu, t_sdu_next, &tx->free_list, list) {
list_del(&t_sdu->list);
free_tx_sdu_struct(t_sdu);
}
spin_unlock_irqrestore(&tx->lock, flags);
spin_lock_irqsave(&rx->submit_lock, flags);
list_for_each_entry_safe(r, r_next, &rx->rx_submit_list,
rx_submit_list) {
spin_unlock_irqrestore(&rx->submit_lock, flags);
usb_kill_urb(r->urb);
spin_lock_irqsave(&rx->submit_lock, flags);
}
spin_unlock_irqrestore(&rx->submit_lock, flags);
spin_lock_irqsave(&rx->rx_lock, flags);
list_for_each_entry_safe(r, r_next, &rx->free_list, free_list) {
list_del(&r->free_list);
free_rx_struct(r);
}
spin_unlock_irqrestore(&rx->rx_lock, flags);
spin_lock_irqsave(&rx->to_host_lock, flags);
list_for_each_entry_safe(r, r_next, &rx->to_host_list, to_host_list) {
if (r->index == (void *)udev) {
list_del(&r->to_host_list);
free_rx_struct(r);
}
}
spin_unlock_irqrestore(&rx->to_host_lock, flags);
}
static int init_usb(struct lte_udev *udev)
{
int ret = 0;
int i;
struct tx_cxt *tx = &udev->tx;
struct rx_cxt *rx = &udev->rx;
struct usb_tx_sdu *t_sdu = NULL;
struct usb_rx *r = NULL;
udev->send_complete = 1;
udev->tx_stop = 0;
udev->request_mac_addr = 0;
udev->usb_state = PM_NORMAL;
INIT_LIST_HEAD(&tx->sdu_list);
INIT_LIST_HEAD(&tx->hci_list);
INIT_LIST_HEAD(&tx->free_list);
INIT_LIST_HEAD(&rx->rx_submit_list);
INIT_LIST_HEAD(&rx->free_list);
INIT_LIST_HEAD(&rx->to_host_list);
spin_lock_init(&tx->lock);
spin_lock_init(&rx->rx_lock);
spin_lock_init(&rx->submit_lock);
spin_lock_init(&rx->to_host_lock);
tx->avail_count = 0;
rx->avail_count = 0;
udev->rx_cb = NULL;
for (i = 0; i < MAX_NUM_SDU_BUF; i++) {
t_sdu = alloc_tx_sdu_struct();
if (!t_sdu) {
ret = -ENOMEM;
goto fail;
}
list_add(&t_sdu->list, &tx->free_list);
tx->avail_count++;
}
for (i = 0; i < MAX_RX_SUBMIT_COUNT * 2; i++) {
r = alloc_rx_struct();
if (!r) {
ret = -ENOMEM;
goto fail;
}
list_add(&r->free_list, &rx->free_list);
rx->avail_count++;
}
INIT_DELAYED_WORK(&udev->work_tx, do_tx);
INIT_DELAYED_WORK(&udev->work_rx, do_rx);
return 0;
fail:
release_usb(udev);
return ret;
}
static int set_mac_address(u8 *data, void *arg)
{
struct phy_dev *phy_dev = arg;
struct lte_udev *udev = phy_dev->priv_dev;
struct tlv *tlv = (struct tlv *)data;
u8 mac_address[ETH_ALEN] = {0, };
if (tlv->type == MAC_ADDRESS && udev->request_mac_addr) {
memcpy(mac_address, tlv->data, tlv->len);
if (register_lte_device(phy_dev,
&udev->intf->dev, mac_address) < 0)
pr_err("register lte device failed\n");
udev->request_mac_addr = 0;
return 1;
}
return 0;
}
static void do_rx(struct work_struct *work)
{
struct lte_udev *udev =
container_of(work, struct lte_udev, work_rx.work);
struct rx_cxt *rx = &udev->rx;
struct usb_rx *r;
struct hci_packet *hci;
struct phy_dev *phy_dev;
u16 cmd_evt;
int ret;
unsigned long flags;
while (1) {
spin_lock_irqsave(&rx->to_host_lock, flags);
if (list_empty(&rx->to_host_list)) {
spin_unlock_irqrestore(&rx->to_host_lock, flags);
break;
}
r = list_entry(rx->to_host_list.next,
struct usb_rx, to_host_list);
list_del(&r->to_host_list);
spin_unlock_irqrestore(&rx->to_host_lock, flags);
phy_dev = r->cb_data;
udev = phy_dev->priv_dev;
hci = (struct hci_packet *)r->buf;
cmd_evt = gdm_dev16_to_cpu(udev->gdm_ed, hci->cmd_evt);
switch (cmd_evt) {
case LTE_GET_INFORMATION_RESULT:
if (set_mac_address(hci->data, r->cb_data) == 0) {
r->callback(r->cb_data,
r->buf,
r->urb->actual_length,
KERNEL_THREAD);
}
break;
default:
if (r->callback) {
ret = r->callback(r->cb_data,
r->buf,
r->urb->actual_length,
KERNEL_THREAD);
if (ret == -EAGAIN)
pr_err("failed to send received data\n");
}
break;
}
put_rx_struct(rx, r);
gdm_usb_recv(udev,
r->callback,
r->cb_data,
USB_COMPLETE);
}
}
static void remove_rx_submit_list(struct usb_rx *r, struct rx_cxt *rx)
{
unsigned long flags;
struct usb_rx *r_remove, *r_remove_next;
spin_lock_irqsave(&rx->submit_lock, flags);
list_for_each_entry_safe(r_remove, r_remove_next,
&rx->rx_submit_list, rx_submit_list) {
if (r == r_remove) {
list_del(&r->rx_submit_list);
break;
}
}
spin_unlock_irqrestore(&rx->submit_lock, flags);
}
static void gdm_usb_rcv_complete(struct urb *urb)
{
struct usb_rx *r = urb->context;
struct rx_cxt *rx = r->rx;
unsigned long flags;
struct lte_udev *udev = container_of(r->rx, struct lte_udev, rx);
struct usb_device *usbdev = udev->usbdev;
remove_rx_submit_list(r, rx);
if (!urb->status && r->callback) {
spin_lock_irqsave(&rx->to_host_lock, flags);
list_add_tail(&r->to_host_list, &rx->to_host_list);
schedule_work(&udev->work_rx.work);
spin_unlock_irqrestore(&rx->to_host_lock, flags);
} else {
if (urb->status && udev->usb_state == PM_NORMAL)
dev_err(&urb->dev->dev, "%s: urb status error %d\n",
__func__, urb->status);
put_rx_struct(rx, r);
}
usb_mark_last_busy(usbdev);
}
static int gdm_usb_recv(void *priv_dev,
int (*cb)(void *cb_data,
void *data, int len, int context),
void *cb_data,
int context)
{
struct lte_udev *udev = priv_dev;
struct usb_device *usbdev = udev->usbdev;
struct rx_cxt *rx = &udev->rx;
struct usb_rx *r;
int no_spc;
int ret;
unsigned long flags;
if (!udev->usbdev) {
pr_err("invalid device\n");
return -ENODEV;
}
r = get_rx_struct(rx, &no_spc);
if (!r) {
pr_err("Out of Memory\n");
return -ENOMEM;
}
udev->rx_cb = cb;
r->callback = cb;
r->cb_data = cb_data;
r->index = (void *)udev;
r->rx = rx;
usb_fill_bulk_urb(r->urb,
usbdev,
usb_rcvbulkpipe(usbdev, 0x83),
r->buf,
RX_BUF_SIZE,
gdm_usb_rcv_complete,
r);
spin_lock_irqsave(&rx->submit_lock, flags);
list_add_tail(&r->rx_submit_list, &rx->rx_submit_list);
spin_unlock_irqrestore(&rx->submit_lock, flags);
if (context == KERNEL_THREAD)
ret = usb_submit_urb(r->urb, GFP_KERNEL);
else
ret = usb_submit_urb(r->urb, GFP_ATOMIC);
if (ret) {
spin_lock_irqsave(&rx->submit_lock, flags);
list_del(&r->rx_submit_list);
spin_unlock_irqrestore(&rx->submit_lock, flags);
pr_err("usb_submit_urb failed (%p)\n", r);
put_rx_struct(rx, r);
}
return ret;
}
static void gdm_usb_send_complete(struct urb *urb)
{
struct usb_tx *t = urb->context;
struct tx_cxt *tx = t->tx;
struct lte_udev *udev = container_of(tx, struct lte_udev, tx);
unsigned long flags;
if (urb->status == -ECONNRESET) {
dev_info(&urb->dev->dev, "CONNRESET\n");
return;
}
if (t->callback)
t->callback(t->cb_data);
free_tx_struct(t);
spin_lock_irqsave(&tx->lock, flags);
udev->send_complete = 1;
schedule_work(&udev->work_tx.work);
spin_unlock_irqrestore(&tx->lock, flags);
}
static int send_tx_packet(struct usb_device *usbdev, struct usb_tx *t, u32 len)
{
int ret = 0;
if (!(len % 512))
len++;
usb_fill_bulk_urb(t->urb,
usbdev,
usb_sndbulkpipe(usbdev, 2),
t->buf,
len,
gdm_usb_send_complete,
t);
ret = usb_submit_urb(t->urb, GFP_ATOMIC);
if (ret)
dev_err(&usbdev->dev, "usb_submit_urb failed: %d\n",
ret);
usb_mark_last_busy(usbdev);
return ret;
}
static u32 packet_aggregation(struct lte_udev *udev, u8 *send_buf)
{
struct tx_cxt *tx = &udev->tx;
struct usb_tx_sdu *t_sdu = NULL;
struct multi_sdu *multi_sdu = (struct multi_sdu *)send_buf;
u16 send_len = 0;
u16 num_packet = 0;
unsigned long flags;
multi_sdu->cmd_evt = gdm_cpu_to_dev16(udev->gdm_ed, LTE_TX_MULTI_SDU);
while (num_packet < MAX_PACKET_IN_MULTI_SDU) {
spin_lock_irqsave(&tx->lock, flags);
if (list_empty(&tx->sdu_list)) {
spin_unlock_irqrestore(&tx->lock, flags);
break;
}
t_sdu = list_entry(tx->sdu_list.next, struct usb_tx_sdu, list);
if (send_len + t_sdu->len > MAX_SDU_SIZE) {
spin_unlock_irqrestore(&tx->lock, flags);
break;
}
list_del(&t_sdu->list);
spin_unlock_irqrestore(&tx->lock, flags);
memcpy(multi_sdu->data + send_len, t_sdu->buf, t_sdu->len);
send_len += (t_sdu->len + 3) & 0xfffc;
num_packet++;
if (tx->avail_count > 10)
t_sdu->callback(t_sdu->cb_data);
spin_lock_irqsave(&tx->lock, flags);
put_tx_struct(tx, t_sdu);
spin_unlock_irqrestore(&tx->lock, flags);
}
multi_sdu->len = gdm_cpu_to_dev16(udev->gdm_ed, send_len);
multi_sdu->num_packet = gdm_cpu_to_dev16(udev->gdm_ed, num_packet);
return send_len + offsetof(struct multi_sdu, data);
}
static void do_tx(struct work_struct *work)
{
struct lte_udev *udev =
container_of(work, struct lte_udev, work_tx.work);
struct usb_device *usbdev = udev->usbdev;
struct tx_cxt *tx = &udev->tx;
struct usb_tx *t = NULL;
int is_send = 0;
u32 len = 0;
unsigned long flags;
if (!usb_autopm_get_interface(udev->intf))
usb_autopm_put_interface(udev->intf);
if (udev->usb_state == PM_SUSPEND)
return;
spin_lock_irqsave(&tx->lock, flags);
if (!udev->send_complete) {
spin_unlock_irqrestore(&tx->lock, flags);
return;
}
udev->send_complete = 0;
if (!list_empty(&tx->hci_list)) {
t = list_entry(tx->hci_list.next, struct usb_tx, list);
list_del(&t->list);
len = t->len;
t->is_sdu = 0;
is_send = 1;
} else if (!list_empty(&tx->sdu_list)) {
if (udev->tx_stop) {
udev->send_complete = 1;
spin_unlock_irqrestore(&tx->lock, flags);
return;
}
t = alloc_tx_struct(TX_BUF_SIZE);
if (!t) {
spin_unlock_irqrestore(&tx->lock, flags);
return;
}
t->callback = NULL;
t->tx = tx;
t->is_sdu = 1;
is_send = 1;
}
if (!is_send) {
udev->send_complete = 1;
spin_unlock_irqrestore(&tx->lock, flags);
return;
}
spin_unlock_irqrestore(&tx->lock, flags);
if (t->is_sdu)
len = packet_aggregation(udev, t->buf);
if (send_tx_packet(usbdev, t, len)) {
pr_err("send_tx_packet failed\n");
t->callback = NULL;
gdm_usb_send_complete(t->urb);
}
}
#define SDU_PARAM_LEN 12
static int gdm_usb_sdu_send(void *priv_dev, void *data, int len,
unsigned int dft_eps_ID, unsigned int eps_ID,
void (*cb)(void *data), void *cb_data,
int dev_idx, int nic_type)
{
struct lte_udev *udev = priv_dev;
struct tx_cxt *tx = &udev->tx;
struct usb_tx_sdu *t_sdu;
struct sdu *sdu = NULL;
unsigned long flags;
int no_spc = 0;
u16 send_len;
if (!udev->usbdev) {
pr_err("sdu send - invalid device\n");
return TX_NO_DEV;
}
spin_lock_irqsave(&tx->lock, flags);
t_sdu = get_tx_sdu_struct(tx, &no_spc);
spin_unlock_irqrestore(&tx->lock, flags);
if (!t_sdu) {
pr_err("sdu send - free list empty\n");
return TX_NO_SPC;
}
sdu = (struct sdu *)t_sdu->buf;
sdu->cmd_evt = gdm_cpu_to_dev16(udev->gdm_ed, LTE_TX_SDU);
if (nic_type == NIC_TYPE_ARP) {
send_len = len + SDU_PARAM_LEN;
memcpy(sdu->data, data, len);
} else {
send_len = len - ETH_HLEN;
send_len += SDU_PARAM_LEN;
memcpy(sdu->data, data + ETH_HLEN, len - ETH_HLEN);
}
sdu->len = gdm_cpu_to_dev16(udev->gdm_ed, send_len);
sdu->dft_eps_ID = gdm_cpu_to_dev32(udev->gdm_ed, dft_eps_ID);
sdu->bearer_ID = gdm_cpu_to_dev32(udev->gdm_ed, eps_ID);
sdu->nic_type = gdm_cpu_to_dev32(udev->gdm_ed, nic_type);
t_sdu->len = send_len + HCI_HEADER_SIZE;
t_sdu->callback = cb;
t_sdu->cb_data = cb_data;
spin_lock_irqsave(&tx->lock, flags);
list_add_tail(&t_sdu->list, &tx->sdu_list);
schedule_work(&udev->work_tx.work);
spin_unlock_irqrestore(&tx->lock, flags);
if (no_spc)
return TX_NO_BUFFER;
return 0;
}
static int gdm_usb_hci_send(void *priv_dev, void *data, int len,
void (*cb)(void *data), void *cb_data)
{
struct lte_udev *udev = priv_dev;
struct tx_cxt *tx = &udev->tx;
struct usb_tx *t;
unsigned long flags;
if (!udev->usbdev) {
pr_err("hci send - invalid device\n");
return -ENODEV;
}
t = alloc_tx_struct(len);
if (!t) {
pr_err("hci_send - out of memory\n");
return -ENOMEM;
}
memcpy(t->buf, data, len);
t->callback = cb;
t->cb_data = cb_data;
t->len = len;
t->tx = tx;
t->is_sdu = 0;
spin_lock_irqsave(&tx->lock, flags);
list_add_tail(&t->list, &tx->hci_list);
schedule_work(&udev->work_tx.work);
spin_unlock_irqrestore(&tx->lock, flags);
return 0;
}
static u8 gdm_usb_get_endian(void *priv_dev)
{
struct lte_udev *udev = priv_dev;
return udev->gdm_ed;
}
static int gdm_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
int ret = 0;
struct phy_dev *phy_dev = NULL;
struct lte_udev *udev = NULL;
u16 idVendor, idProduct;
int bInterfaceNumber;
struct usb_device *usbdev = interface_to_usbdev(intf);
bInterfaceNumber = intf->cur_altsetting->desc.bInterfaceNumber;
idVendor = __le16_to_cpu(usbdev->descriptor.idVendor);
idProduct = __le16_to_cpu(usbdev->descriptor.idProduct);
pr_info("net vid = 0x%04x pid = 0x%04x\n", idVendor, idProduct);
if (bInterfaceNumber > NETWORK_INTERFACE) {
pr_info("not a network device\n");
return -ENODEV;
}
phy_dev = kzalloc(sizeof(*phy_dev), GFP_KERNEL);
if (!phy_dev)
return -ENOMEM;
udev = kzalloc(sizeof(*udev), GFP_KERNEL);
if (!udev) {
ret = -ENOMEM;
goto err_udev;
}
phy_dev->priv_dev = (void *)udev;
phy_dev->send_hci_func = gdm_usb_hci_send;
phy_dev->send_sdu_func = gdm_usb_sdu_send;
phy_dev->rcv_func = gdm_usb_recv;
phy_dev->get_endian = gdm_usb_get_endian;
udev->usbdev = usbdev;
ret = init_usb(udev);
if (ret < 0) {
dev_err(intf->usb_dev, "init_usb func failed\n");
goto err_init_usb;
}
udev->intf = intf;
intf->needs_remote_wakeup = 1;
usb_enable_autosuspend(usbdev);
pm_runtime_set_autosuspend_delay(&usbdev->dev, AUTO_SUSPEND_TIMER);
/* List up hosts with big endians, otherwise,
* defaults to little endian
*/
if (idProduct == PID_GDM7243)
udev->gdm_ed = ENDIANNESS_BIG;
else
udev->gdm_ed = ENDIANNESS_LITTLE;
ret = request_mac_address(udev);
if (ret < 0) {
dev_err(intf->usb_dev, "request Mac address failed\n");
goto err_mac_address;
}
start_rx_proc(phy_dev);
usb_get_dev(usbdev);
usb_set_intfdata(intf, phy_dev);
return 0;
err_mac_address:
release_usb(udev);
err_init_usb:
kfree(udev);
err_udev:
kfree(phy_dev);
return ret;
}
static void gdm_usb_disconnect(struct usb_interface *intf)
{
struct phy_dev *phy_dev;
struct lte_udev *udev;
struct usb_device *usbdev;
usbdev = interface_to_usbdev(intf);
phy_dev = usb_get_intfdata(intf);
udev = phy_dev->priv_dev;
unregister_lte_device(phy_dev);
release_usb(udev);
kfree(udev);
udev = NULL;
kfree(phy_dev);
phy_dev = NULL;
usb_put_dev(usbdev);
}
static int gdm_usb_suspend(struct usb_interface *intf, pm_message_t pm_msg)
{
struct phy_dev *phy_dev;
struct lte_udev *udev;
struct rx_cxt *rx;
struct usb_rx *r;
struct usb_rx *r_next;
unsigned long flags;
phy_dev = usb_get_intfdata(intf);
udev = phy_dev->priv_dev;
rx = &udev->rx;
if (udev->usb_state != PM_NORMAL) {
dev_err(intf->usb_dev, "usb suspend - invalid state\n");
return -1;
}
udev->usb_state = PM_SUSPEND;
spin_lock_irqsave(&rx->submit_lock, flags);
list_for_each_entry_safe(r, r_next, &rx->rx_submit_list,
rx_submit_list) {
spin_unlock_irqrestore(&rx->submit_lock, flags);
usb_kill_urb(r->urb);
spin_lock_irqsave(&rx->submit_lock, flags);
}
spin_unlock_irqrestore(&rx->submit_lock, flags);
cancel_work_sync(&udev->work_tx.work);
cancel_work_sync(&udev->work_rx.work);
return 0;
}
static int gdm_usb_resume(struct usb_interface *intf)
{
struct phy_dev *phy_dev;
struct lte_udev *udev;
struct tx_cxt *tx;
struct rx_cxt *rx;
unsigned long flags;
int issue_count;
int i;
phy_dev = usb_get_intfdata(intf);
udev = phy_dev->priv_dev;
rx = &udev->rx;
if (udev->usb_state != PM_SUSPEND) {
dev_err(intf->usb_dev, "usb resume - invalid state\n");
return -1;
}
udev->usb_state = PM_NORMAL;
spin_lock_irqsave(&rx->rx_lock, flags);
issue_count = rx->avail_count - MAX_RX_SUBMIT_COUNT;
spin_unlock_irqrestore(&rx->rx_lock, flags);
if (issue_count >= 0) {
for (i = 0; i < issue_count; i++)
gdm_usb_recv(phy_dev->priv_dev,
udev->rx_cb,
phy_dev,
USB_COMPLETE);
}
tx = &udev->tx;
spin_lock_irqsave(&tx->lock, flags);
schedule_work(&udev->work_tx.work);
spin_unlock_irqrestore(&tx->lock, flags);
return 0;
}
static struct usb_driver gdm_usb_lte_driver = {
.name = "gdm_lte",
.probe = gdm_usb_probe,
.disconnect = gdm_usb_disconnect,
.id_table = id_table,
.supports_autosuspend = 1,
.suspend = gdm_usb_suspend,
.resume = gdm_usb_resume,
.reset_resume = gdm_usb_resume,
};
static int __init gdm_usb_lte_init(void)
{
if (gdm_lte_event_init() < 0) {
pr_err("error creating event\n");
return -1;
}
return usb_register(&gdm_usb_lte_driver);
}
static void __exit gdm_usb_lte_exit(void)
{
gdm_lte_event_exit();
usb_deregister(&gdm_usb_lte_driver);
}
module_init(gdm_usb_lte_init);
module_exit(gdm_usb_lte_exit);
MODULE_VERSION(DRIVER_VERSION);
MODULE_DESCRIPTION("GCT LTE USB Device Driver");
MODULE_LICENSE("GPL");
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