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Subject[PATCH v2 1/2] staging: gdm7240: adding LTE USB driver
Date
GCT Semiconductor GDM7240 is 4G LTE chip.
This driver supports GCT reference platform as a USB device.

Signed-off-by: Won Kang <wonkang@gctsemi.com>

staging: gdm7240: added contacts for code maintanance

Signed-off-by: Won Kang <wonkang@gctsemi.com>

staging: gdm7240: style fixes

Signed-off-by: Won Kang <wonkang@gctsemi.com>
---
v2: cleanup and minor fixes
drivers/staging/Kconfig | 2 +
drivers/staging/Makefile | 1 +
drivers/staging/gdm724x/Kconfig | 15 +
drivers/staging/gdm724x/Makefile | 7 +
drivers/staging/gdm724x/TODO | 15 +
drivers/staging/gdm724x/gdm_endian.c | 67 +++
drivers/staging/gdm724x/gdm_endian.h | 49 ++
drivers/staging/gdm724x/gdm_lte.c | 920 +++++++++++++++++++++++++++++
drivers/staging/gdm724x/gdm_lte.h | 80 +++
drivers/staging/gdm724x/gdm_mux.c | 700 +++++++++++++++++++++++
drivers/staging/gdm724x/gdm_mux.h | 85 +++
drivers/staging/gdm724x/gdm_tty.c | 367 ++++++++++++
drivers/staging/gdm724x/gdm_tty.h | 59 ++
drivers/staging/gdm724x/gdm_usb.c | 1047 ++++++++++++++++++++++++++++++++++
drivers/staging/gdm724x/gdm_usb.h | 110 ++++
drivers/staging/gdm724x/hci.h | 55 ++
drivers/staging/gdm724x/hci_packet.h | 93 +++
drivers/staging/gdm724x/lte_ioctl.h | 58 ++
drivers/staging/gdm724x/netlink_k.c | 161 ++++++
drivers/staging/gdm724x/netlink_k.h | 25 +
20 files changed, 3916 insertions(+)
create mode 100644 drivers/staging/gdm724x/Kconfig
create mode 100644 drivers/staging/gdm724x/Makefile
create mode 100644 drivers/staging/gdm724x/TODO
create mode 100644 drivers/staging/gdm724x/gdm_endian.c
create mode 100644 drivers/staging/gdm724x/gdm_endian.h
create mode 100644 drivers/staging/gdm724x/gdm_lte.c
create mode 100644 drivers/staging/gdm724x/gdm_lte.h
create mode 100644 drivers/staging/gdm724x/gdm_mux.c
create mode 100644 drivers/staging/gdm724x/gdm_mux.h
create mode 100644 drivers/staging/gdm724x/gdm_tty.c
create mode 100644 drivers/staging/gdm724x/gdm_tty.h
create mode 100644 drivers/staging/gdm724x/gdm_usb.c
create mode 100644 drivers/staging/gdm724x/gdm_usb.h
create mode 100644 drivers/staging/gdm724x/hci.h
create mode 100644 drivers/staging/gdm724x/hci_packet.h
create mode 100644 drivers/staging/gdm724x/lte_ioctl.h
create mode 100644 drivers/staging/gdm724x/netlink_k.c
create mode 100644 drivers/staging/gdm724x/netlink_k.h

diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 57d8b34..d55bc34 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -118,6 +118,8 @@ source "drivers/staging/ozwpan/Kconfig"

source "drivers/staging/gdm72xx/Kconfig"

+source "drivers/staging/gdm724x/Kconfig"
+
source "drivers/staging/silicom/Kconfig"

source "drivers/staging/ced1401/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 429321f..c23cf3b 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_MFD_NVEC) += nvec/
obj-$(CONFIG_ANDROID) += android/
obj-$(CONFIG_USB_WPAN_HCD) += ozwpan/
obj-$(CONFIG_WIMAX_GDM72XX) += gdm72xx/
+obj-$(CONFIG_LTE_GDM724X) += gdm724x/
obj-$(CONFIG_NET_VENDOR_SILICOM) += silicom/
obj-$(CONFIG_CED1401) += ced1401/
obj-$(CONFIG_DRM_IMX) += imx-drm/
diff --git a/drivers/staging/gdm724x/Kconfig b/drivers/staging/gdm724x/Kconfig
new file mode 100644
index 0000000..10f7be1
--- /dev/null
+++ b/drivers/staging/gdm724x/Kconfig
@@ -0,0 +1,15 @@
+#
+# GCT GDM724x LTE driver configuration
+#
+
+config LTE_GDM724X
+ tristate "GCT GDM724x LTE support"
+ depends on NET && USB
+ help
+ This driver supports GCT GDM724x LTE chip based USB modem devices.
+ It exposes 4 network devices to be used per PDN and 2 tty devices to be
+ used for AT commands and DM monitoring applications.
+ The modules will be called gdmulte.ko and gdmtty.ko
+
+ GCT-ATCx can be used for AT Commands
+ GCT-DMx can be used for LTE protocol monitoring
diff --git a/drivers/staging/gdm724x/Makefile b/drivers/staging/gdm724x/Makefile
new file mode 100644
index 0000000..ba7f11a
--- /dev/null
+++ b/drivers/staging/gdm724x/Makefile
@@ -0,0 +1,7 @@
+obj-$(CONFIG_LTE_GDM724X) := gdmulte.o
+gdmulte-y += gdm_lte.o netlink_k.o
+gdmulte-y += gdm_usb.o gdm_endian.o
+
+obj-$(CONFIG_LTE_GDM724X) += gdmtty.o
+gdmtty-y := gdm_tty.o gdm_mux.o
+
diff --git a/drivers/staging/gdm724x/TODO b/drivers/staging/gdm724x/TODO
new file mode 100644
index 0000000..cd89214
--- /dev/null
+++ b/drivers/staging/gdm724x/TODO
@@ -0,0 +1,15 @@
+TODO:
+- Clean up coding style to meet kernel standard. (80 line limit, netdev_err)
+- Remove test for host endian
+- Remove confusing macros (endian, hci_send, sdu_send, rcv_with_cb)
+- Fixes for every instances of function returning -1
+- Check for skb->len in gdm_lte_emulate_arp()
+- Use ALIGN() macro for dummy_cnt in up_to_host()
+- Error handling in init_usb()
+- Explain reason for multiples of 512 bytes in alloc_tx_struct()
+- Review use of atomic allocation for tx structs
+- No error checking for alloc_tx_struct in do_tx()
+
+Patches to:
+ Jonathan Kim <jonathankim@gctsemi.com>
+ Dean ahn <deanahn@gctsemi.com>
diff --git a/drivers/staging/gdm724x/gdm_endian.c b/drivers/staging/gdm724x/gdm_endian.c
new file mode 100644
index 0000000..0293409
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_endian.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 "gdm_endian.h"
+
+void set_endian(struct gdm_endian *ed, u8 dev_endian)
+{
+ u8 a[2] = {0x12, 0x34};
+ u8 b[2] = {0, };
+ u16 c = 0x1234;
+
+ if (dev_endian == ENDIANNESS_BIG)
+ ed->dev_ed = ENDIANNESS_BIG;
+ else
+ ed->dev_ed = ENDIANNESS_LITTLE;
+
+ memcpy(b, &c, 2);
+
+ if (a[0] != b[0])
+ ed->host_ed = ENDIANNESS_LITTLE;
+ else
+ ed->host_ed = ENDIANNESS_BIG;
+
+}
+
+u16 gdm_cpu_to_dev16(struct gdm_endian *ed, u16 x)
+{
+ if (ed->dev_ed == ed->host_ed)
+ return x;
+
+ return Endian16_Swap(x);
+}
+
+u16 gdm_dev16_to_cpu(struct gdm_endian *ed, u16 x)
+{
+ if (ed->dev_ed == ed->host_ed)
+ return x;
+
+ return Endian16_Swap(x);
+}
+
+u32 gdm_cpu_to_dev32(struct gdm_endian *ed, u32 x)
+{
+ if (ed->dev_ed == ed->host_ed)
+ return x;
+
+ return Endian32_Swap(x);
+}
+
+u32 gdm_dev32_to_cpu(struct gdm_endian *ed, u32 x)
+{
+ if (ed->dev_ed == ed->host_ed)
+ return x;
+
+ return Endian32_Swap(x);
+}
diff --git a/drivers/staging/gdm724x/gdm_endian.h b/drivers/staging/gdm724x/gdm_endian.h
new file mode 100644
index 0000000..775794d
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_endian.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 __GDM_ENDIAN_H__
+#define __GDM_ENDIAN_H__
+
+#include <linux/types.h>
+
+#define Endian16_Swap(value) \
+ ((((u16)((value) & 0x00FF)) << 8) | \
+ (((u16)((value) & 0xFF00)) >> 8))
+
+#define Endian32_Swap(value) \
+ ((((u32)((value) & 0x000000FF)) << 24) | \
+ (((u32)((value) & 0x0000FF00)) << 8) | \
+ (((u32)((value) & 0x00FF0000)) >> 8) | \
+ (((u32)((value) & 0xFF000000)) >> 24))
+
+enum {
+ ENDIANNESS_MIN = 0,
+ ENDIANNESS_UNKNOWN,
+ ENDIANNESS_LITTLE,
+ ENDIANNESS_BIG,
+ ENDIANNESS_MIDDLE,
+ ENDIANNESS_MAX
+};
+
+struct gdm_endian {
+ u8 dev_ed;
+ u8 host_ed;
+};
+
+void set_endian(struct gdm_endian *ed, u8 dev_endian);
+u16 gdm_cpu_to_dev16(struct gdm_endian *ed, u16 x);
+u16 gdm_dev16_to_cpu(struct gdm_endian *ed, u16 x);
+u32 gdm_cpu_to_dev32(struct gdm_endian *ed, u32 x);
+u32 gdm_dev32_to_cpu(struct gdm_endian *ed, u32 x);
+
+#endif /*__GDM_ENDIAN_H__*/
diff --git a/drivers/staging/gdm724x/gdm_lte.c b/drivers/staging/gdm724x/gdm_lte.c
new file mode 100644
index 0000000..357474a
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_lte.c
@@ -0,0 +1,920 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/version.h>
+#include <linux/etherdevice.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/udp.h>
+#include <linux/in.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/udp.h>
+#include <linux/tcp.h>
+#include <linux/icmp.h>
+#include <linux/icmpv6.h>
+#include <linux/uaccess.h>
+#include <net/ndisc.h>
+
+#include "gdm_lte.h"
+#include "netlink_k.h"
+#include "hci.h"
+#include "hci_packet.h"
+#include "gdm_endian.h"
+#include "lte_ioctl.h"
+
+/*
+ * Netlink protocol number
+ */
+#define NETLINK_LTE 30
+
+/*
+ * Default MTU Size
+ */
+#define DEFAULT_MTU_SIZE 1500
+
+#define gdm_dev_endian(n) (\
+ n->phy_dev->get_endian(n->phy_dev->priv_dev))
+
+#define gdm_lte_hci_send(n, d, l) (\
+ n->phy_dev->send_hci_func(n->phy_dev->priv_dev, d, l, NULL, NULL))
+
+#define gdm_lte_sdu_send(n, d, l, c, b, i, t) (\
+ n->phy_dev->send_sdu_func(n->phy_dev->priv_dev, d, l, n->pdn_table.dft_eps_id, 0, c, b, i, t))
+
+#define gdm_lte_rcv_with_cb(n, c, b, e) (\
+ n->rcv_func(n->priv_dev, c, b, e))
+
+#define IP_VERSION_4 4
+#define IP_VERSION_6 6
+
+static struct {
+ int ref_cnt;
+ struct sock *sock;
+} lte_event;
+
+static struct device_type wwan_type = {
+ .name = "wwan",
+};
+
+static int gdm_lte_open(struct net_device *dev)
+{
+ netif_start_queue(dev);
+ return 0;
+}
+
+static int gdm_lte_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+static int gdm_lte_set_config(struct net_device *dev, struct ifmap *map)
+{
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+ return 0;
+}
+
+static void tx_complete(void *arg)
+{
+ struct nic *nic = arg;
+
+ if (netif_queue_stopped(nic->netdev))
+ netif_wake_queue(nic->netdev);
+}
+
+static int gdm_lte_rx(struct sk_buff *skb, struct nic *nic, int nic_type)
+{
+ int ret;
+
+ ret = netif_rx_ni(skb);
+ if (ret == NET_RX_DROP) {
+ printk(KERN_ERR "glte: rx - dropped\n");
+ nic->stats.rx_dropped++;
+ } else {
+ nic->stats.rx_packets++;
+ nic->stats.rx_bytes += skb->len + ETH_HLEN;
+ }
+
+ return 0;
+}
+
+int gdm_lte_emulate_arp(struct sk_buff *skb_in, u32 nic_type)
+{
+ struct nic *nic = netdev_priv(skb_in->dev);
+ struct sk_buff *skb_out;
+ struct ethhdr eth;
+ struct vlan_ethhdr vlan_eth;
+ struct arphdr *arp_in;
+ struct arphdr *arp_out;
+ struct arpdata {
+ u8 ar_sha[ETH_ALEN];
+ u8 ar_sip[4];
+ u8 ar_tha[ETH_ALEN];
+ u8 ar_tip[4];
+ };
+ struct arpdata *arp_data_in;
+ struct arpdata *arp_data_out;
+ u8 arp_temp[60];
+ void *mac_header_data;
+ u32 mac_header_len;
+
+ /* Format the mac header so that it can be put to skb */
+ if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) {
+ memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr));
+ mac_header_data = &vlan_eth;
+ mac_header_len = VLAN_ETH_HLEN;
+ } else {
+ memcpy(&eth, skb_in->data, sizeof(struct ethhdr));
+ mac_header_data = &eth;
+ mac_header_len = ETH_HLEN;
+ }
+
+ /* Get the pointer of the original request */
+ arp_in = (struct arphdr *)(skb_in->data + mac_header_len);
+ arp_data_in = (struct arpdata *)(skb_in->data + mac_header_len + sizeof(struct arphdr));
+
+ /* Get the pointer of the outgoing response */
+ arp_out = (struct arphdr *)arp_temp;
+ arp_data_out = (struct arpdata *)(arp_temp + sizeof(struct arphdr));
+
+ /* Copy the arp header */
+ memcpy(arp_out, arp_in, sizeof(struct arphdr));
+ arp_out->ar_op = htons(ARPOP_REPLY);
+
+ /* Copy the arp payload: based on 2 bytes of mac and fill the IP */
+ arp_data_out->ar_sha[0] = arp_data_in->ar_sha[0];
+ arp_data_out->ar_sha[1] = arp_data_in->ar_sha[1];
+ memcpy(&arp_data_out->ar_sha[2], &arp_data_in->ar_tip[0], 4);
+ memcpy(&arp_data_out->ar_sip[0], &arp_data_in->ar_tip[0], 4);
+ memcpy(&arp_data_out->ar_tha[0], &arp_data_in->ar_sha[0], 6);
+ memcpy(&arp_data_out->ar_tip[0], &arp_data_in->ar_sip[0], 4);
+
+ /* Fill the destination mac with source mac of the received packet */
+ memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN);
+ /* Fill the source mac with nic's source mac */
+ memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
+
+ /* Alloc skb and reserve align */
+ skb_out = dev_alloc_skb(skb_in->len);
+ if (!skb_out)
+ return -ENOMEM;
+ skb_reserve(skb_out, NET_IP_ALIGN);
+
+ memcpy(skb_put(skb_out, mac_header_len), mac_header_data, mac_header_len);
+ memcpy(skb_put(skb_out, sizeof(struct arphdr)), arp_out, sizeof(struct arphdr));
+ memcpy(skb_put(skb_out, sizeof(struct arpdata)), arp_data_out, sizeof(struct arpdata));
+
+ skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
+ skb_out->dev = skb_in->dev;
+ skb_reset_mac_header(skb_out);
+ skb_pull(skb_out, ETH_HLEN);
+
+ gdm_lte_rx(skb_out, nic, nic_type);
+
+ return 0;
+}
+
+int icmp6_checksum(struct ipv6hdr *ipv6, u16 *ptr, int len)
+{
+ unsigned short *w = ptr;
+ int sum = 0;
+ int i;
+
+ union {
+ struct {
+ u8 ph_src[16];
+ u8 ph_dst[16];
+ u32 ph_len;
+ u8 ph_zero[3];
+ u8 ph_nxt;
+ } ph __packed;
+ u16 pa[20];
+ } pseudo_header;
+
+ memset(&pseudo_header, 0, sizeof(pseudo_header));
+ memcpy(&pseudo_header.ph.ph_src, &ipv6->saddr.in6_u.u6_addr8, 16);
+ memcpy(&pseudo_header.ph.ph_dst, &ipv6->daddr.in6_u.u6_addr8, 16);
+ pseudo_header.ph.ph_len = ipv6->payload_len;
+ pseudo_header.ph.ph_nxt = ipv6->nexthdr;
+
+ w = (u16 *)&pseudo_header;
+ for (i = 0; i < sizeof(pseudo_header.pa) / sizeof(pseudo_header.pa[0]); i++)
+ sum += pseudo_header.pa[i];
+
+ w = ptr;
+ while (len > 1) {
+ sum += *w++;
+ len -= 2;
+ }
+
+ sum = (sum >> 16) + (sum & 0xFFFF);
+ sum += (sum >> 16);
+ sum = ~sum & 0xffff;
+
+ return sum;
+}
+
+int gdm_lte_emulate_ndp(struct sk_buff *skb_in, u32 nic_type)
+{
+ struct nic *nic = netdev_priv(skb_in->dev);
+ struct sk_buff *skb_out;
+ struct ethhdr eth;
+ struct vlan_ethhdr vlan_eth;
+ struct neighbour_advertisement {
+ u8 target_address[16];
+ u8 type;
+ u8 length;
+ u8 link_layer_address[6];
+ };
+ struct neighbour_advertisement na;
+ struct neighbour_solicitation {
+ u8 target_address[16];
+ };
+ struct neighbour_solicitation *ns;
+ struct ipv6hdr *ipv6_in;
+ struct ipv6hdr ipv6_out;
+ struct icmp6hdr *icmp6_in;
+ struct icmp6hdr icmp6_out;
+
+ void *mac_header_data;
+ u32 mac_header_len;
+
+ /* Format the mac header so that it can be put to skb */
+ if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) {
+ memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr));
+ if (ntohs(vlan_eth.h_vlan_encapsulated_proto) != ETH_P_IPV6)
+ return -1;
+ mac_header_data = &vlan_eth;
+ mac_header_len = VLAN_ETH_HLEN;
+ } else {
+ memcpy(&eth, skb_in->data, sizeof(struct ethhdr));
+ if (ntohs(eth.h_proto) != ETH_P_IPV6)
+ return -1;
+ mac_header_data = &eth;
+ mac_header_len = ETH_HLEN;
+ }
+
+ /* Check if this is IPv6 ICMP packet */
+ ipv6_in = (struct ipv6hdr *)(skb_in->data + mac_header_len);
+ if (ipv6_in->version != 6 || ipv6_in->nexthdr != IPPROTO_ICMPV6)
+ return -1;
+
+ /* Check if this is NDP packet */
+ icmp6_in = (struct icmp6hdr *)(skb_in->data + mac_header_len + sizeof(struct ipv6hdr));
+ if (icmp6_in->icmp6_type == NDISC_ROUTER_SOLICITATION) { /* Check RS */
+ return -1;
+ } else if (icmp6_in->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) { /* Check NS */
+ u8 icmp_na[sizeof(struct icmp6hdr) + sizeof(struct neighbour_advertisement)];
+ u8 zero_addr8[16] = {0,};
+
+ if (memcmp(ipv6_in->saddr.in6_u.u6_addr8, zero_addr8, 16) == 0)
+ /* Duplicate Address Detection: Source IP is all zero */
+ return 0;
+
+ icmp6_out.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
+ icmp6_out.icmp6_code = 0;
+ icmp6_out.icmp6_cksum = 0;
+ icmp6_out.icmp6_dataun.un_data32[0] = htonl(0x60000000); /* R=0, S=1, O=1 */
+
+ ns = (struct neighbour_solicitation *)(skb_in->data + mac_header_len + sizeof(struct ipv6hdr) + sizeof(struct icmp6hdr));
+ memcpy(&na.target_address, ns->target_address, 16);
+ na.type = 0x02;
+ na.length = 1;
+ na.link_layer_address[0] = 0x00;
+ na.link_layer_address[1] = 0x0a;
+ na.link_layer_address[2] = 0x3b;
+ na.link_layer_address[3] = 0xaf;
+ na.link_layer_address[4] = 0x63;
+ na.link_layer_address[5] = 0xc7;
+
+ memcpy(&ipv6_out, ipv6_in, sizeof(struct ipv6hdr));
+ memcpy(ipv6_out.saddr.in6_u.u6_addr8, &na.target_address, 16);
+ memcpy(ipv6_out.daddr.in6_u.u6_addr8, ipv6_in->saddr.in6_u.u6_addr8, 16);
+ ipv6_out.payload_len = htons(sizeof(struct icmp6hdr) + sizeof(struct neighbour_advertisement));
+
+ memcpy(icmp_na, &icmp6_out, sizeof(struct icmp6hdr));
+ memcpy(icmp_na + sizeof(struct icmp6hdr), &na, sizeof(struct neighbour_advertisement));
+
+ icmp6_out.icmp6_cksum = icmp6_checksum(&ipv6_out, (u16 *)icmp_na, sizeof(icmp_na));
+ } else {
+ return -1;
+ }
+
+ /* Fill the destination mac with source mac of the received packet */
+ memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN);
+ /* Fill the source mac with nic's source mac */
+ memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
+
+ /* Alloc skb and reserve align */
+ skb_out = dev_alloc_skb(skb_in->len);
+ if (!skb_out)
+ return -ENOMEM;
+ skb_reserve(skb_out, NET_IP_ALIGN);
+
+ memcpy(skb_put(skb_out, mac_header_len), mac_header_data, mac_header_len);
+ memcpy(skb_put(skb_out, sizeof(struct ipv6hdr)), &ipv6_out, sizeof(struct ipv6hdr));
+ memcpy(skb_put(skb_out, sizeof(struct icmp6hdr)), &icmp6_out, sizeof(struct icmp6hdr));
+ memcpy(skb_put(skb_out, sizeof(struct neighbour_advertisement)), &na, sizeof(struct neighbour_advertisement));
+
+ skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
+ skb_out->dev = skb_in->dev;
+ skb_reset_mac_header(skb_out);
+ skb_pull(skb_out, ETH_HLEN);
+
+ gdm_lte_rx(skb_out, nic, nic_type);
+
+ return 0;
+}
+
+static s32 gdm_lte_tx_nic_type(struct net_device *dev, struct sk_buff *skb)
+{
+ struct nic *nic = netdev_priv(dev);
+ struct ethhdr *eth;
+ struct vlan_ethhdr *vlan_eth;
+ struct iphdr *ip;
+ struct ipv6hdr *ipv6;
+ int mac_proto;
+ void *network_data;
+ u32 nic_type = 0;
+
+ /* NIC TYPE is based on the nic_id of this net_device */
+ nic_type = 0x00000010 | nic->nic_id;
+
+ /* Get ethernet protocol */
+ eth = (struct ethhdr *)skb->data;
+ if (ntohs(eth->h_proto) == ETH_P_8021Q) {
+ vlan_eth = (struct vlan_ethhdr *)skb->data;
+ mac_proto = ntohs(vlan_eth->h_vlan_encapsulated_proto);
+ network_data = skb->data + VLAN_ETH_HLEN;
+ nic_type |= NIC_TYPE_F_VLAN;
+ } else {
+ mac_proto = ntohs(eth->h_proto);
+ network_data = skb->data + ETH_HLEN;
+ }
+
+ /* Process packet for nic type */
+ switch (mac_proto) {
+ case ETH_P_ARP:
+ nic_type |= NIC_TYPE_ARP;
+ break;
+ case ETH_P_IP:
+ nic_type |= NIC_TYPE_F_IPV4;
+ ip = (struct iphdr *)network_data;
+
+ /* Check DHCPv4 */
+ if (ip->protocol == IPPROTO_UDP) {
+ struct udphdr *udp = (struct udphdr *)(network_data + sizeof(struct iphdr));
+ if (ntohs(udp->dest) == 67 || ntohs(udp->dest) == 68)
+ nic_type |= NIC_TYPE_F_DHCP;
+ }
+ break;
+ case ETH_P_IPV6:
+ nic_type |= NIC_TYPE_F_IPV6;
+ ipv6 = (struct ipv6hdr *)network_data;
+
+ if (ipv6->nexthdr == IPPROTO_ICMPV6) /* Check NDP request */ {
+ struct icmp6hdr *icmp6 = (struct icmp6hdr *)(network_data + sizeof(struct ipv6hdr));
+ if (/*icmp6->icmp6_type == NDISC_ROUTER_SOLICITATION || */
+ icmp6->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
+ nic_type |= NIC_TYPE_ICMPV6;
+ } else if (ipv6->nexthdr == IPPROTO_UDP) /* Check DHCPv6 */ {
+ struct udphdr *udp = (struct udphdr *)(network_data + sizeof(struct ipv6hdr));
+ if (ntohs(udp->dest) == 546 || ntohs(udp->dest) == 547)
+ nic_type |= NIC_TYPE_F_DHCP;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return nic_type;
+}
+
+static int gdm_lte_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ struct nic *nic = netdev_priv(dev);
+ u32 nic_type;
+ void *data_buf;
+ int data_len;
+ int idx;
+ int ret = 0;
+
+ nic_type = gdm_lte_tx_nic_type(dev, skb);
+ if (nic_type == 0) {
+ printk(KERN_ERR "glte: tx - invalid nic_type\n");
+ return -1;
+ }
+
+ if (nic_type & NIC_TYPE_ARP) {
+ if (gdm_lte_emulate_arp(skb, nic_type) == 0) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ }
+
+ if (nic_type & NIC_TYPE_ICMPV6) {
+ if (gdm_lte_emulate_ndp(skb, nic_type) == 0) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ }
+
+ /*
+ Need byte shift (that is, remove VLAN tag) if there is one
+ For the case of ARP, this breaks the offset as vlan_ethhdr+4 is treated as ethhdr
+ However, it shouldn't be a problem as the reponse starts from arp_hdr and ethhdr
+ is created by this driver based on the NIC mac
+ */
+ if (nic_type & NIC_TYPE_F_VLAN) {
+ struct vlan_ethhdr *vlan_eth = (struct vlan_ethhdr *)skb->data;
+ nic->vlan_id = ntohs(vlan_eth->h_vlan_TCI) & VLAN_VID_MASK;
+ data_buf = skb->data + (VLAN_ETH_HLEN - ETH_HLEN);
+ data_len = skb->len - (VLAN_ETH_HLEN - ETH_HLEN);
+ } else {
+ nic->vlan_id = 0;
+ data_buf = skb->data;
+ data_len = skb->len;
+ }
+
+ /* If it is a ICMPV6 packet, clear all the other bits : for backward compatibilty with the firmware */
+ if (nic_type & NIC_TYPE_ICMPV6)
+ nic_type = NIC_TYPE_ICMPV6;
+
+ /* If it is not a dhcp packet, clear all the flag bits : original NIC, otherwise the special flag (IPVX | DHCP) */
+ if (!(nic_type & NIC_TYPE_F_DHCP))
+ nic_type &= NIC_TYPE_MASK;
+
+ sscanf(dev->name, "lte%d", &idx);
+
+ ret = gdm_lte_sdu_send(nic,
+ data_buf,
+ data_len,
+ tx_complete,
+ nic,
+ idx,
+ nic_type);
+
+ if (ret == TX_NO_BUFFER || ret == TX_NO_SPC) {
+ netif_stop_queue(dev);
+ if (ret == TX_NO_BUFFER)
+ ret = 0;
+ else
+ ret = -ENOSPC;
+ } else if (ret == TX_NO_DEV) {
+ ret = -ENODEV;
+ }
+
+ /* Updates tx stats */
+ if (ret) {
+ nic->stats.tx_dropped++;
+ } else {
+ nic->stats.tx_packets++;
+ nic->stats.tx_bytes += data_len;
+ }
+ dev_kfree_skb(skb);
+
+ return 0;
+}
+
+static struct net_device_stats *gdm_lte_stats(struct net_device *dev)
+{
+ struct nic *nic = netdev_priv(dev);
+ return &nic->stats;
+}
+
+static void get_dev_endian(struct data_t *data, struct net_device *dev)
+{
+ struct nic *nic = netdev_priv(dev);
+ unsigned long ret;
+
+ ret = copy_to_user(data->buf, gdm_dev_endian(nic), sizeof(struct dev_endian_t));
+ if (ret)
+ printk(KERN_INFO "glte: state - failed to copy\n");
+}
+
+static int gdm_lte_ioctl_get_data(struct wm_req_t *req, struct net_device *dev)
+{
+ u16 id = req->data_id;
+
+ switch (id) {
+ case GET_ENDIAN_INFO:
+ /* required for the user space application to find out device endian */
+ get_dev_endian(&req->data, dev);
+ break;
+ default:
+ printk(KERN_ERR "glte: ioctl - unknown type %d\n", id);
+ break;
+ }
+ return 0;
+}
+
+static int gdm_lte_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ struct wm_req_t *req = (struct wm_req_t *)ifr;
+
+ if (cmd != SIOCLTEIOCTL || req->cmd != SIOCG_DATA || req->data_id >= 100)
+ return -EOPNOTSUPP;
+
+ return gdm_lte_ioctl_get_data(req, dev);
+}
+
+static int gdm_lte_event_send(struct net_device *dev, char *buf, int len)
+{
+ struct nic *nic = netdev_priv(dev);
+ struct hci_packet *hci = (struct hci_packet *)buf;
+ int idx;
+
+ sscanf(dev->name, "lte%d", &idx);
+
+ return netlink_send(lte_event.sock, idx, 0, buf,
+ gdm_dev16_to_cpu(gdm_dev_endian(nic), hci->len) + HCI_HEADER_SIZE);
+}
+
+static void gdm_lte_event_rcv(struct net_device *dev, u16 type, void *msg, int len)
+{
+ struct nic *nic = netdev_priv(dev);
+
+ gdm_lte_hci_send(nic, msg, len);
+}
+
+int gdm_lte_event_init(void)
+{
+ if (lte_event.ref_cnt == 0)
+ lte_event.sock = netlink_init(NETLINK_LTE, gdm_lte_event_rcv);
+
+ if (lte_event.sock) {
+ lte_event.ref_cnt++;
+ return 0;
+ }
+
+ printk(KERN_ERR "glte: event init failed\n");
+ return -1;
+}
+
+void gdm_lte_event_exit(void)
+{
+ if (lte_event.sock && --lte_event.ref_cnt == 0) {
+ netlink_exit(lte_event.sock);
+ lte_event.sock = NULL;
+ }
+}
+
+static u8 find_dev_index(u32 nic_type)
+{
+ u8 index;
+
+ index = (u8)(nic_type & 0x0000000f);
+ if (index > MAX_NIC_TYPE)
+ index = 0;
+
+ return index;
+}
+
+static void gdm_lte_netif_rx(struct net_device *dev, char *buf, int len, int flagged_nic_type)
+{
+ u32 nic_type;
+ struct nic *nic;
+ struct sk_buff *skb;
+ struct ethhdr eth;
+ struct vlan_ethhdr vlan_eth;
+ void *mac_header_data;
+ u32 mac_header_len;
+ char ip_version = 0;
+
+ nic_type = flagged_nic_type & NIC_TYPE_MASK;
+ nic = netdev_priv(dev);
+
+ if (flagged_nic_type & NIC_TYPE_F_DHCP) {
+ /* Change the destination mac address with the one requested the IP */
+ if (flagged_nic_type & NIC_TYPE_F_IPV4) {
+ struct dhcp_packet {
+ u8 op; /* BOOTREQUEST or BOOTREPLY */
+ u8 htype; /* hardware address type. 1 = 10mb ethernet */
+ u8 hlen; /* hardware address length */
+ u8 hops; /* used by relay agents only */
+ u32 xid; /* unique id */
+ u16 secs; /* elapsed since client began acquisition/renewal */
+ u16 flags; /* only one flag so far: */
+ #define BROADCAST_FLAG 0x8000 /* "I need broadcast replies" */
+ u32 ciaddr; /* client IP (if client is in BOUND, RENEW or REBINDING state) */
+ u32 yiaddr; /* 'your' (client) IP address */
+ /* IP address of next server to use in bootstrap, returned in DHCPOFFER, DHCPACK by server */
+ u32 siaddr_nip;
+ u32 gateway_nip; /* relay agent IP address */
+ u8 chaddr[16]; /* link-layer client hardware address (MAC) */
+ u8 sname[64]; /* server host name (ASCIZ) */
+ u8 file[128]; /* boot file name (ASCIZ) */
+ u32 cookie; /* fixed first four option bytes (99,130,83,99 dec) */
+ } __packed;
+ void *addr = buf + sizeof(struct iphdr) + sizeof(struct udphdr) + offsetof(struct dhcp_packet, chaddr);
+ memcpy(nic->dest_mac_addr, addr, ETH_ALEN);
+ }
+ }
+
+ if (nic->vlan_id > 0) {
+ mac_header_data = (void *)&vlan_eth;
+ mac_header_len = VLAN_ETH_HLEN;
+ } else {
+ mac_header_data = (void *)&eth;
+ mac_header_len = ETH_HLEN;
+ }
+
+ /* Format the data so that it can be put to skb */
+ memcpy(mac_header_data, nic->dest_mac_addr, ETH_ALEN);
+ memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
+
+ vlan_eth.h_vlan_TCI = htons(nic->vlan_id);
+ vlan_eth.h_vlan_proto = htons(ETH_P_8021Q);
+
+ if (nic_type == NIC_TYPE_ARP) {
+ /* Should be response: Only happens because there was a request from the host */
+ eth.h_proto = htons(ETH_P_ARP);
+ vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_ARP);
+ } else {
+ ip_version = buf[0] >> 4;
+ if (ip_version == IP_VERSION_4) {
+ eth.h_proto = htons(ETH_P_IP);
+ vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IP);
+ } else if (ip_version == IP_VERSION_6) {
+ eth.h_proto = htons(ETH_P_IPV6);
+ vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
+ } else {
+ printk(KERN_ERR "glte: Unknown IP version %d\n", ip_version);
+ return;
+ }
+ }
+
+ /* Alloc skb and reserve align */
+ skb = dev_alloc_skb(len + mac_header_len + NET_IP_ALIGN);
+ if (!skb)
+ return;
+ skb_reserve(skb, NET_IP_ALIGN);
+
+ memcpy(skb_put(skb, mac_header_len), mac_header_data, mac_header_len);
+ memcpy(skb_put(skb, len), buf, len);
+
+ skb->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
+ skb->dev = dev;
+ skb_reset_mac_header(skb);
+ skb_pull(skb, ETH_HLEN);
+
+ gdm_lte_rx(skb, nic, nic_type);
+}
+
+static void gdm_lte_multi_sdu_pkt(struct phy_dev *phy_dev, char *buf, int len)
+{
+ struct net_device *dev;
+ struct multi_sdu *multi_sdu = (struct multi_sdu *)buf;
+ struct sdu *sdu = NULL;
+ u8 *data = (u8 *)multi_sdu->data;
+ u16 i = 0;
+ u16 num_packet;
+ u16 hci_len;
+ u16 cmd_evt;
+ u32 nic_type;
+ u8 index;
+
+ hci_len = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), multi_sdu->len);
+ num_packet = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), multi_sdu->num_packet);
+
+ for (i = 0; i < num_packet; i++) {
+ sdu = (struct sdu *)data;
+
+ cmd_evt = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), sdu->cmd_evt);
+ hci_len = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), sdu->len);
+ nic_type = gdm_dev32_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), sdu->nic_type);
+
+ if (cmd_evt != LTE_RX_SDU) {
+ printk(KERN_ERR "glte: rx sdu wrong hci %04x\n", cmd_evt);
+ return;
+ }
+ if (hci_len < 12) {
+ printk(KERN_ERR "glte: rx sdu invalid len %d\n", hci_len);
+ return;
+ }
+
+ index = find_dev_index(nic_type);
+ if (index < MAX_NIC_TYPE) {
+ dev = phy_dev->dev[index];
+ gdm_lte_netif_rx(dev, (char *)sdu->data, (int)(hci_len-12), nic_type);
+ } else {
+ printk(KERN_ERR "glte: rx sdu invalid nic_type : %x\n", nic_type);
+ }
+
+ data += ((hci_len+3) & 0xfffc) + HCI_HEADER_SIZE;
+ }
+}
+
+static void gdm_lte_pdn_table(struct net_device *dev, char *buf, int len)
+{
+ struct nic *nic = netdev_priv(dev);
+ struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf;
+
+ if (pdn_table->activate) {
+ nic->pdn_table.activate = pdn_table->activate;
+ nic->pdn_table.dft_eps_id = gdm_dev32_to_cpu(gdm_dev_endian(nic), pdn_table->dft_eps_id);
+ nic->pdn_table.nic_type = gdm_dev32_to_cpu(gdm_dev_endian(nic), pdn_table->nic_type);
+
+ printk(KERN_INFO "glte: pdn %s activated, nic_type=0x%x\n",
+ dev->name, nic->pdn_table.nic_type);
+ } else {
+ memset(&nic->pdn_table, 0x00, sizeof(struct pdn_table));
+ printk(KERN_INFO "glte: pdn %s deactivated\n",
+ dev->name);
+ }
+}
+
+static int gdm_lte_receive_pkt(struct phy_dev *phy_dev, char *buf, int len)
+{
+ struct hci_packet *hci = (struct hci_packet *)buf;
+ struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf;
+ struct sdu *sdu;
+ struct net_device *dev;
+ int ret = 0;
+ u16 cmd_evt;
+ u32 nic_type;
+ u8 index;
+
+ if (!len)
+ return ret;
+
+ cmd_evt = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), hci->cmd_evt);
+
+ dev = phy_dev->dev[0];
+ if (dev == NULL)
+ return 0;
+
+ switch (cmd_evt) {
+ case LTE_RX_SDU:
+ sdu = (struct sdu *)hci->data;
+ nic_type = gdm_dev32_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), sdu->nic_type);
+ index = find_dev_index(nic_type);
+ dev = phy_dev->dev[index];
+ gdm_lte_netif_rx(dev, hci->data, len, nic_type);
+ break;
+ case LTE_RX_MULTI_SDU:
+ gdm_lte_multi_sdu_pkt(phy_dev, buf, len);
+ break;
+ case LTE_LINK_ON_OFF_INDICATION:
+ {
+ struct hci_connect_ind *connect_ind = (struct hci_connect_ind *)buf;
+ printk(KERN_INFO "glte: link %s\n",
+ connect_ind->connect ? "on" : "off");
+ }
+ break;
+ case LTE_PDN_TABLE_IND:
+ pdn_table = (struct hci_pdn_table_ind *)buf;
+ nic_type = gdm_dev32_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), pdn_table->nic_type);
+ index = find_dev_index(nic_type);
+ dev = phy_dev->dev[index];
+ gdm_lte_pdn_table(dev, buf, len);
+ /* Fall through */
+ default:
+ ret = gdm_lte_event_send(dev, buf, len);
+ break;
+ }
+
+ return ret;
+}
+
+static int rx_complete(void *arg, void *data, int len, int context)
+{
+ struct phy_dev *phy_dev = (struct phy_dev *)arg;
+
+ return gdm_lte_receive_pkt(phy_dev, (char *)data, len);
+}
+
+void start_rx_proc(struct phy_dev *phy_dev)
+{
+ int i;
+
+ for (i = 0; i < MAX_RX_SUBMIT_COUNT; i++)
+ gdm_lte_rcv_with_cb(phy_dev, rx_complete, phy_dev, USB_COMPLETE);
+}
+
+static struct net_device_ops gdm_netdev_ops = {
+ .ndo_open = gdm_lte_open,
+ .ndo_stop = gdm_lte_close,
+ .ndo_set_config = gdm_lte_set_config,
+ .ndo_start_xmit = gdm_lte_tx,
+ .ndo_get_stats = gdm_lte_stats,
+ .ndo_do_ioctl = gdm_lte_ioctl,
+};
+
+static u8 gdm_lte_macaddr[ETH_ALEN] = {0x00, 0x0a, 0x3b, 0x00, 0x00, 0x00};
+
+static void form_mac_address(u8 *dev_addr, u8 *nic_src, u8 *nic_dest, u8 *mac_address, u8 index)
+{
+ /* Form the dev_addr */
+ if (!mac_address)
+ memcpy(dev_addr, gdm_lte_macaddr, ETH_ALEN);
+ else
+ memcpy(dev_addr, mac_address, ETH_ALEN);
+
+ /* The last byte of the mac address should be less than or equal to 0xFC */
+ dev_addr[ETH_ALEN-1] += index;
+
+ /* Create random nic src and copy the first 3 bytes to be the same as dev_addr */
+ random_ether_addr(nic_src);
+ memcpy(nic_src, dev_addr, 3);
+
+ /* Copy the nic_dest from dev_addr*/
+ memcpy(nic_dest, dev_addr, ETH_ALEN);
+}
+
+static void validate_mac_address(u8 *mac_address)
+{
+ /* if zero address or multicast bit set, restore the default value */
+ if (is_zero_ether_addr(mac_address) || (mac_address[0] & 0x01)) {
+ printk(KERN_ERR "glte: MAC invalid, restoring default\n");
+ memcpy(mac_address, gdm_lte_macaddr, 6);
+ }
+}
+
+int register_lte_device(struct phy_dev *phy_dev, struct device *dev, u8 *mac_address)
+{
+ struct nic *nic;
+ struct net_device *net;
+ char pdn_dev_name[16];
+ int ret = 0;
+ u8 index;
+
+ validate_mac_address(mac_address);
+
+ for (index = 0; index < MAX_NIC_TYPE; index++) {
+ /* Create device name lteXpdnX */
+ sprintf(pdn_dev_name, "lte%%dpdn%d", index);
+
+ /* Allocate netdev */
+ net = alloc_netdev(sizeof(struct nic), pdn_dev_name, ether_setup);
+ if (net == NULL) {
+ printk(KERN_ERR "glte: alloc_netdev failed\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+ net->netdev_ops = &gdm_netdev_ops;
+ net->flags &= ~IFF_MULTICAST;
+ net->mtu = DEFAULT_MTU_SIZE;
+
+ nic = netdev_priv(net);
+ memset(nic, 0, sizeof(struct nic));
+ nic->netdev = net;
+ nic->phy_dev = phy_dev;
+ nic->nic_id = index;
+
+ form_mac_address(
+ net->dev_addr,
+ nic->src_mac_addr,
+ nic->dest_mac_addr,
+ mac_address,
+ index);
+
+ SET_NETDEV_DEV(net, dev);
+ SET_NETDEV_DEVTYPE(net, &wwan_type);
+
+ ret = register_netdev(net);
+ if (ret)
+ goto err;
+
+ netif_carrier_on(net);
+
+ phy_dev->dev[index] = net;
+ }
+
+ return 0;
+
+err:
+ unregister_lte_device(phy_dev);
+
+ return ret;
+}
+
+void unregister_lte_device(struct phy_dev *phy_dev)
+{
+ struct net_device *net;
+ int index;
+
+ for (index = 0; index < MAX_NIC_TYPE; index++) {
+ net = phy_dev->dev[index];
+ if (net == NULL)
+ continue;
+
+ unregister_netdev(net);
+ free_netdev(net);
+ }
+}
diff --git a/drivers/staging/gdm724x/gdm_lte.h b/drivers/staging/gdm724x/gdm_lte.h
new file mode 100644
index 0000000..1614e91
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_lte.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _GDM_LTE_H_
+#define _GDM_LTE_H_
+
+#include <linux/netdevice.h>
+#include <linux/version.h>
+#include <linux/types.h>
+
+#include "gdm_endian.h"
+
+#define MAX_NIC_TYPE 4
+#define MAX_RX_SUBMIT_COUNT 3
+#define DRIVER_VERSION "3.7.17.0"
+
+enum TX_ERROR_CODE {
+ TX_NO_ERROR = 0,
+ TX_NO_DEV,
+ TX_NO_SPC,
+ TX_NO_BUFFER,
+};
+
+enum CALLBACK_CONTEXT {
+ KERNEL_THREAD = 0,
+ USB_COMPLETE,
+};
+
+struct pdn_table {
+ u8 activate;
+ u32 dft_eps_id;
+ u32 nic_type;
+} __packed;
+
+struct nic;
+
+struct phy_dev {
+ void *priv_dev;
+ struct net_device *dev[MAX_NIC_TYPE];
+ int (*send_hci_func)(void *priv_dev, void *data, int len,
+ void (*cb)(void *cb_data), void *cb_data);
+ int (*send_sdu_func)(void *priv_dev, void *data, int len,
+ unsigned int dftEpsId, unsigned int epsId,
+ void (*cb)(void *cb_data), void *cb_data,
+ int dev_idx, int nic_type);
+ int (*rcv_func)(void *priv_dev,
+ int (*cb)(void *cb_data, void *data, int len, int context),
+ void *cb_data, int context);
+ struct gdm_endian *(*get_endian)(void *priv_dev);
+};
+
+struct nic {
+ struct net_device *netdev;
+ struct phy_dev *phy_dev;
+ struct net_device_stats stats;
+ struct pdn_table pdn_table;
+ u8 dest_mac_addr[ETH_ALEN];
+ u8 src_mac_addr[ETH_ALEN];
+ u32 nic_id;
+ u16 vlan_id;
+};
+
+int gdm_lte_event_init(void);
+void gdm_lte_event_exit(void);
+
+void start_rx_proc(struct phy_dev *phy_dev);
+int register_lte_device(struct phy_dev *phy_dev, struct device *dev, u8 *mac_address);
+void unregister_lte_device(struct phy_dev *phy_dev);
+
+#endif /* _GDM_LTE_H_ */
diff --git a/drivers/staging/gdm724x/gdm_mux.c b/drivers/staging/gdm724x/gdm_mux.c
new file mode 100644
index 0000000..2199f1b
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_mux.c
@@ -0,0 +1,700 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/slab.h>
+#include <linux/usb/cdc.h>
+
+#include "gdm_mux.h"
+#include "gdm_tty.h"
+
+struct workqueue_struct *mux_rx_wq;
+
+static u16 packet_type[TTY_MAX_COUNT] = {0xF011, 0xF010};
+
+#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_ACM
+
+static const struct usb_device_id id_table[] = {
+ { USB_DEVICE_CDC_DATA(0x1076, 0x8000) }, /* GCT GDM7240 */
+ { USB_DEVICE_CDC_DATA(0x1076, 0x8f00) }, /* GCT GDM7243 */
+ { USB_DEVICE_CDC_DATA(0x1076, 0x9000) }, /* GCT GDM7243 */
+ { USB_DEVICE_CDC_DATA(0x1d74, 0x2300) }, /* LGIT Phoenix */
+ {}
+};
+
+
+MODULE_DEVICE_TABLE(usb, id_table);
+
+int packet_type_to_index(u16 packetType)
+{
+ int i;
+
+ for (i = 0; i < TTY_MAX_COUNT; i++) {
+ if (packet_type[i] == packetType)
+ return i;
+ }
+
+ return -1;
+}
+
+static struct mux_tx *alloc_mux_tx(int len)
+{
+ struct mux_tx *t = NULL;
+
+ t = kzalloc(sizeof(struct mux_tx), GFP_ATOMIC);
+ if (!t)
+ return NULL;
+
+ t->urb = usb_alloc_urb(0, GFP_ATOMIC);
+ t->buf = kmalloc(MUX_TX_MAX_SIZE, GFP_ATOMIC);
+ if (!t->urb || !t->buf) {
+ usb_free_urb(t->urb);
+ kfree(t->buf);
+ kfree(t);
+ return NULL;
+ }
+
+ return t;
+}
+
+static void free_mux_tx(struct mux_tx *t)
+{
+ if (t) {
+ usb_free_urb(t->urb);
+ kfree(t->buf);
+ kfree(t);
+ }
+}
+
+static struct mux_rx *alloc_mux_rx(void)
+{
+ struct mux_rx *r = NULL;
+
+ r = kzalloc(sizeof(struct mux_rx), GFP_ATOMIC);
+ if (!r)
+ return NULL;
+
+ r->urb = usb_alloc_urb(0, GFP_ATOMIC);
+ r->buf = kmalloc(MUX_RX_MAX_SIZE, GFP_ATOMIC);
+ if (!r->urb || !r->buf) {
+ usb_free_urb(r->urb);
+ kfree(r->buf);
+ kfree(r);
+ return NULL;
+ }
+
+ return r;
+}
+
+static void free_mux_rx(struct mux_rx *r)
+{
+ if (r) {
+ usb_free_urb(r->urb);
+ kfree(r->buf);
+ kfree(r);
+ }
+}
+
+static struct mux_rx *get_rx_struct(struct rx_cxt *rx)
+{
+ struct mux_rx *r;
+ unsigned long flags;
+
+ spin_lock_irqsave(&rx->free_list_lock, flags);
+
+ if (list_empty(&rx->rx_free_list)) {
+ spin_unlock_irqrestore(&rx->free_list_lock, flags);
+ return NULL;
+ }
+
+ r = list_entry(rx->rx_free_list.prev, struct mux_rx, free_list);
+ list_del(&r->free_list);
+
+ spin_unlock_irqrestore(&rx->free_list_lock, flags);
+
+ return r;
+}
+
+static void put_rx_struct(struct rx_cxt *rx, struct mux_rx *r)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&rx->free_list_lock, flags);
+ list_add_tail(&r->free_list, &rx->rx_free_list);
+ spin_unlock_irqrestore(&rx->free_list_lock, flags);
+}
+
+
+static int up_to_host(struct mux_rx *r)
+{
+ struct mux_dev *mux_dev = (struct mux_dev *)r->mux_dev;
+ struct mux_pkt_header *mux_header;
+ unsigned int start_flag;
+ unsigned int payload_size;
+ unsigned short packet_type;
+ int remain;
+ int dummy_cnt;
+ u32 packet_size_sum = r->offset;
+ int index;
+ int ret = TO_HOST_INVALID_PACKET;
+ int len = r->len;
+
+ while (1) {
+ mux_header = (struct mux_pkt_header *)(r->buf + packet_size_sum);
+ start_flag = __le32_to_cpu(mux_header->start_flag);
+ payload_size = __le32_to_cpu(mux_header->payload_size);
+ packet_type = __le16_to_cpu(mux_header->packet_type);
+
+ if (start_flag != START_FLAG) {
+ printk(KERN_ERR "glte: invalid START_FLAG %x\n",
+ start_flag);
+ break;
+ }
+
+ remain = (MUX_HEADER_SIZE + payload_size) % 4;
+ dummy_cnt = remain ? (4-remain) : 0;
+
+ if (len - packet_size_sum <
+ MUX_HEADER_SIZE + payload_size + dummy_cnt) {
+ printk(KERN_ERR "glte: invalid payload : %d %d %04x\n",
+ payload_size, len,
+ packet_type
+ );
+ break;
+ }
+
+ index = packet_type_to_index(packet_type);
+ if (index < 0) {
+ printk(KERN_ERR "glte: invalid index %d\n", index);
+ break;
+ }
+
+ ret = r->callback(mux_header->data,
+ payload_size,
+ index,
+ mux_dev->minor[index],
+ RECV_PACKET_PROCESS_CONTINUE
+ );
+ if (ret == TO_HOST_BUFFER_REQUEST_FAIL) {
+ r->offset += packet_size_sum;
+ break;
+ }
+
+ packet_size_sum += MUX_HEADER_SIZE + payload_size + dummy_cnt;
+ if (len - packet_size_sum <= MUX_HEADER_SIZE + 2) {
+ ret = r->callback(NULL,
+ 0,
+ index,
+ mux_dev->minor[index],
+ RECV_PACKET_PROCESS_COMPLETE
+ );
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static void do_rx(struct work_struct *work)
+{
+ struct mux_dev *mux_dev =
+ container_of(work, struct mux_dev , work_rx.work);
+ struct mux_rx *r;
+ struct rx_cxt *rx = (struct rx_cxt *)&mux_dev->rx;
+ unsigned long flags;
+ int ret = 0;
+
+ 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 mux_rx, to_host_list);
+ list_del(&r->to_host_list);
+ spin_unlock_irqrestore(&rx->to_host_lock, flags);
+
+ ret = up_to_host(r);
+ if (ret == TO_HOST_BUFFER_REQUEST_FAIL)
+ printk(KERN_ERR "glte: failed to send mux data to host\n");
+ else
+ put_rx_struct(rx, r);
+ }
+}
+
+static void remove_rx_submit_list(struct mux_rx *r, struct rx_cxt *rx)
+{
+ unsigned long flags;
+ struct mux_rx *r_remove, *r_remove_next;
+
+ spin_lock_irqsave(&rx->submit_list_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);
+ }
+ spin_unlock_irqrestore(&rx->submit_list_lock, flags);
+}
+
+static void gdm_mux_rcv_complete(struct urb *urb)
+{
+ struct mux_rx *r = urb->context;
+ struct mux_dev *mux_dev = (struct mux_dev *)r->mux_dev;
+ struct rx_cxt *rx = &mux_dev->rx;
+ unsigned long flags;
+
+ remove_rx_submit_list(r, rx);
+
+ if (urb->status) {
+ if (mux_dev->usb_state == PM_NORMAL)
+ printk(KERN_ERR "glte: gdm_mux_rcv_complete urb status error %d\n", urb->status);
+ put_rx_struct(rx, r);
+ } else {
+ r->len = r->urb->actual_length;
+ spin_lock_irqsave(&rx->to_host_lock, flags);
+ list_add_tail(&r->to_host_list, &rx->to_host_list);
+ queue_work(mux_rx_wq, &mux_dev->work_rx.work);
+ spin_unlock_irqrestore(&rx->to_host_lock, flags);
+ }
+}
+
+static int gdm_mux_recv(void *priv_dev,
+ int (*cb)(void *data, int len, int tty_index, int minor, int complete)
+ )
+{
+ struct mux_dev *mux_dev = priv_dev;
+ struct usb_device *usbdev = mux_dev->usbdev;
+ struct mux_rx *r;
+ struct rx_cxt *rx = &mux_dev->rx;
+ unsigned long flags;
+ int ret;
+
+ if (!usbdev) {
+ printk(KERN_ERR "glte: device is disconnected\n");
+ return -ENODEV;
+ }
+
+ r = get_rx_struct(rx);
+ if (!r) {
+ printk(KERN_ERR "glte: get_rx_struct fail\n");
+ return -ENOMEM;
+ }
+
+ r->offset = 0;
+ r->mux_dev = (void *)mux_dev;
+ r->callback = cb;
+ mux_dev->rx_cb = cb;
+
+ usb_fill_bulk_urb(r->urb,
+ usbdev,
+ usb_rcvbulkpipe(usbdev, 0x86),
+ r->buf,
+ MUX_RX_MAX_SIZE,
+ gdm_mux_rcv_complete,
+ r);
+
+ spin_lock_irqsave(&rx->submit_list_lock, flags);
+ list_add_tail(&r->rx_submit_list, &rx->rx_submit_list);
+ spin_unlock_irqrestore(&rx->submit_list_lock, flags);
+
+ ret = usb_submit_urb(r->urb, GFP_KERNEL);
+
+ if (ret) {
+ spin_lock_irqsave(&rx->submit_list_lock, flags);
+ list_del(&r->rx_submit_list);
+ spin_unlock_irqrestore(&rx->submit_list_lock, flags);
+
+ put_rx_struct(rx, r);
+
+ printk(KERN_ERR "glte: usb_submit_urb ret=%d\n", ret);
+ }
+
+ usb_mark_last_busy(usbdev);
+
+ return ret;
+}
+
+static void gdm_mux_send_complete(struct urb *urb)
+{
+ struct mux_tx *t = urb->context;
+
+ if (urb->status == -ECONNRESET) {
+ printk(KERN_INFO "glte: CONNRESET\n");
+ free_mux_tx(t);
+ return;
+ }
+
+ if (t->callback)
+ t->callback(t->cb_data);
+
+ free_mux_tx(t);
+}
+
+static int gdm_mux_send(void *priv_dev, void *data, int len, int tty_index,
+ void (*cb)(void *data), void *cb_data)
+{
+ struct mux_dev *mux_dev = priv_dev;
+ struct usb_device *usbdev = mux_dev->usbdev;
+ struct mux_pkt_header *mux_header;
+ struct mux_tx *t = NULL;
+ static u32 seq_num = 1;
+ int remain;
+ int dummy_cnt;
+ int total_len;
+ int ret;
+ unsigned long flags;
+
+ if (mux_dev->usb_state == PM_SUSPEND) {
+ ret = usb_autopm_get_interface(mux_dev->intf);
+ if (!ret)
+ usb_autopm_put_interface(mux_dev->intf);
+ }
+
+ spin_lock_irqsave(&mux_dev->write_lock, flags);
+
+ remain = (MUX_HEADER_SIZE + len) % 4;
+ dummy_cnt = remain ? (4 - remain) : 0;
+
+ total_len = len + MUX_HEADER_SIZE + dummy_cnt;
+
+ t = alloc_mux_tx(total_len);
+ if (!t) {
+ printk(KERN_ERR "glte: alloc_mux_tx fail\n");
+ spin_unlock_irqrestore(&mux_dev->write_lock, flags);
+ return -ENOMEM;
+ }
+
+ mux_header = (struct mux_pkt_header *)t->buf;
+ mux_header->start_flag = __cpu_to_le32(START_FLAG);
+ mux_header->seq_num = __cpu_to_le32(seq_num++);
+ mux_header->payload_size = __cpu_to_le32((u32)len);
+ mux_header->packet_type = __cpu_to_le16(packet_type[tty_index]);
+
+ memcpy(t->buf+MUX_HEADER_SIZE, data, len);
+ memset(t->buf+MUX_HEADER_SIZE+len, 0, dummy_cnt);
+
+ t->len = total_len;
+ t->callback = cb;
+ t->cb_data = cb_data;
+
+ usb_fill_bulk_urb(t->urb,
+ usbdev,
+ usb_sndbulkpipe(usbdev, 5),
+ t->buf,
+ total_len,
+ gdm_mux_send_complete,
+ t);
+
+ ret = usb_submit_urb(t->urb, GFP_KERNEL);
+
+ spin_unlock_irqrestore(&mux_dev->write_lock, flags);
+
+ if (ret)
+ printk(KERN_ERR "glte: usb_submit_urb Error : %d\n", ret);
+
+ usb_mark_last_busy(usbdev);
+
+ return ret;
+}
+
+static int gdm_mux_send_control(void *priv_dev, int request, int value, void *buf, int len)
+{
+ struct mux_dev *mux_dev = priv_dev;
+ struct usb_device *usbdev = mux_dev->usbdev;
+ int ret;
+
+ ret = usb_control_msg(usbdev,
+ usb_sndctrlpipe(usbdev, 0),
+ request,
+ USB_RT_ACM,
+ value,
+ 2,
+ buf,
+ len,
+ 5000
+ );
+
+ if (ret < 0)
+ printk(KERN_ERR "glte: usb_control_msg error : %d\n", ret);
+
+ return ret < 0 ? ret : 0;
+}
+
+static void release_usb(struct mux_dev *mux_dev)
+{
+ struct rx_cxt *rx = &mux_dev->rx;
+ struct mux_rx *r, *r_next;
+ unsigned long flags;
+
+ cancel_delayed_work(&mux_dev->work_rx);
+
+ spin_lock_irqsave(&rx->submit_list_lock, flags);
+ list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, rx_submit_list) {
+ spin_unlock_irqrestore(&rx->submit_list_lock, flags);
+ usb_kill_urb(r->urb);
+ spin_lock_irqsave(&rx->submit_list_lock, flags);
+ }
+ spin_unlock_irqrestore(&rx->submit_list_lock, flags);
+
+ spin_lock_irqsave(&rx->free_list_lock, flags);
+ list_for_each_entry_safe(r, r_next, &rx->rx_free_list, free_list) {
+ list_del(&r->free_list);
+ free_mux_rx(r);
+ }
+ spin_unlock_irqrestore(&rx->free_list_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->mux_dev == (void *)mux_dev) {
+ list_del(&r->to_host_list);
+ free_mux_rx(r);
+ }
+ }
+ spin_unlock_irqrestore(&rx->to_host_lock, flags);
+}
+
+
+static int init_usb(struct mux_dev *mux_dev)
+{
+ struct mux_rx *r;
+ struct rx_cxt *rx = &mux_dev->rx;
+ int ret = 0;
+ int i;
+
+ spin_lock_init(&mux_dev->write_lock);
+ INIT_LIST_HEAD(&rx->to_host_list);
+ INIT_LIST_HEAD(&rx->rx_submit_list);
+ INIT_LIST_HEAD(&rx->rx_free_list);
+ spin_lock_init(&rx->to_host_lock);
+ spin_lock_init(&rx->submit_list_lock);
+ spin_lock_init(&rx->free_list_lock);
+
+ for (i = 0; i < MAX_ISSUE_NUM * 2; i++) {
+ r = alloc_mux_rx();
+ if (r == NULL) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ list_add(&r->free_list, &rx->rx_free_list);
+ }
+
+ INIT_DELAYED_WORK(&mux_dev->work_rx, do_rx);
+
+ return ret;
+}
+
+static int gdm_mux_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+ struct mux_dev *mux_dev = NULL;
+ struct tty_dev *tty_dev = NULL;
+ u16 idVendor, idProduct;
+ int bInterfaceNumber;
+ int ret = 0;
+ int i;
+ 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);
+
+ printk(KERN_INFO "glte: mux vid = 0x%04x pid = 0x%04x\n",
+ idVendor, idProduct);
+
+ if (bInterfaceNumber != 2) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ mux_dev = kzalloc(sizeof(struct mux_dev), GFP_KERNEL);
+ if (!mux_dev) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ tty_dev = kzalloc(sizeof(struct tty_dev), GFP_KERNEL);
+ if (!tty_dev) {
+ kfree(mux_dev);
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ mux_dev->usbdev = usbdev;
+ mux_dev->control_intf = intf;
+
+ ret = init_usb(mux_dev);
+ if (ret < 0)
+ goto out;
+
+ tty_dev->priv_dev = (void *)mux_dev;
+ tty_dev->send_func = gdm_mux_send;
+ tty_dev->recv_func = gdm_mux_recv;
+ tty_dev->send_control = gdm_mux_send_control;
+
+ if (register_lte_tty_device(tty_dev, &intf->dev) < 0) {
+ unregister_lte_tty_device(tty_dev);
+ mux_dev = tty_dev->priv_dev;
+
+ ret = -1;
+ goto out;
+ }
+ for (i = 0; i < TTY_MAX_COUNT; i++)
+ mux_dev->minor[i] = tty_dev->minor[i];
+
+out:
+ if (ret < 0) {
+ kfree(tty_dev);
+ if (mux_dev) {
+ release_usb(mux_dev);
+ kfree(mux_dev);
+ }
+ } else {
+ mux_dev->intf = intf;
+ mux_dev->usb_state = PM_NORMAL;
+ }
+
+ usb_get_dev(usbdev);
+ usb_set_intfdata(intf, tty_dev);
+
+ return ret;
+}
+
+static void gdm_mux_disconnect(struct usb_interface *intf)
+{
+ struct tty_dev *tty_dev;
+ struct mux_dev *mux_dev;
+ struct usb_device *usbdev = interface_to_usbdev(intf);
+
+ tty_dev = usb_get_intfdata(intf);
+
+ mux_dev = tty_dev->priv_dev;
+
+ release_usb(mux_dev);
+ unregister_lte_tty_device(tty_dev);
+
+ kfree(mux_dev);
+ kfree(tty_dev);
+
+ usb_put_dev(usbdev);
+}
+
+static int gdm_mux_suspend(struct usb_interface *intf, pm_message_t pm_msg)
+{
+ struct tty_dev *tty_dev;
+ struct mux_dev *mux_dev;
+ struct rx_cxt *rx;
+ struct mux_rx *r, *r_next;
+ unsigned long flags;
+
+ tty_dev = usb_get_intfdata(intf);
+ mux_dev = tty_dev->priv_dev;
+ rx = &mux_dev->rx;
+
+ if (mux_dev->usb_state != PM_NORMAL) {
+ printk(KERN_ERR "glte: usb suspend - invalid state\n");
+ return -1;
+ }
+
+ mux_dev->usb_state = PM_SUSPEND;
+
+
+ spin_lock_irqsave(&rx->submit_list_lock, flags);
+ list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, rx_submit_list) {
+ spin_unlock_irqrestore(&rx->submit_list_lock, flags);
+ usb_kill_urb(r->urb);
+ spin_lock_irqsave(&rx->submit_list_lock, flags);
+ }
+ spin_unlock_irqrestore(&rx->submit_list_lock, flags);
+
+ return 0;
+}
+
+static int gdm_mux_resume(struct usb_interface *intf)
+{
+ struct tty_dev *tty_dev;
+ struct mux_dev *mux_dev;
+ u8 i;
+
+ tty_dev = usb_get_intfdata(intf);
+ mux_dev = tty_dev->priv_dev;
+
+ if (mux_dev->usb_state != PM_SUSPEND) {
+ printk(KERN_ERR "glte: usb resume - invalid state\n");
+ return -1;
+ }
+
+ mux_dev->usb_state = PM_NORMAL;
+
+ for (i = 0; i < MAX_ISSUE_NUM; i++)
+ gdm_mux_recv(mux_dev, mux_dev->rx_cb);
+
+ return 0;
+}
+
+static struct usb_driver gdm_mux_driver = {
+ .name = "gdm_mux",
+ .probe = gdm_mux_probe,
+ .disconnect = gdm_mux_disconnect,
+ .id_table = id_table,
+ .supports_autosuspend = 1,
+ .suspend = gdm_mux_suspend,
+ .resume = gdm_mux_resume,
+ .reset_resume = gdm_mux_resume,
+};
+
+static int __init gdm_usb_mux_init(void)
+{
+
+ mux_rx_wq = create_workqueue("mux_rx_wq");
+ if (mux_rx_wq == NULL) {
+ printk(KERN_ERR "glte: work queue create fail");
+ return -1;
+ }
+
+ register_lte_tty_driver();
+
+ return usb_register(&gdm_mux_driver);
+}
+
+static void __exit gdm_usb_mux_exit(void)
+{
+ unregister_lte_tty_driver();
+
+ if (mux_rx_wq) {
+ flush_workqueue(mux_rx_wq);
+ destroy_workqueue(mux_rx_wq);
+ }
+
+ usb_deregister(&gdm_mux_driver);
+}
+
+module_init(gdm_usb_mux_init);
+module_exit(gdm_usb_mux_exit);
+
+MODULE_DESCRIPTION("GCT LTE TTY Device Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/gdm724x/gdm_mux.h b/drivers/staging/gdm724x/gdm_mux.h
new file mode 100644
index 0000000..e8cfa8d
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_mux.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _GDM_MUX_H_
+#define _GDM_MUX_H_
+
+#include <linux/types.h>
+#include <linux/usb.h>
+#include <linux/list.h>
+
+#define PM_NORMAL 0
+#define PM_SUSPEND 1
+
+#define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE)
+
+#define START_FLAG 0xA512485A
+#define MUX_HEADER_SIZE 14
+#define MUX_TX_MAX_SIZE (1024*10)
+#define MUX_RX_MAX_SIZE (1024*30)
+#define AT_PKT_TYPE 0xF011
+#define DM_PKT_TYPE 0xF010
+
+#define RETRY_TIMER 30 /* msec */
+
+struct mux_pkt_header {
+ unsigned int start_flag;
+ unsigned int seq_num;
+ unsigned int payload_size;
+ unsigned short packet_type;
+ unsigned char data[0];
+};
+
+struct mux_tx {
+ struct urb *urb;
+ u8 *buf;
+ int len;
+ void (*callback)(void *cb_data);
+ void *cb_data;
+};
+
+struct mux_rx {
+ struct list_head free_list;
+ struct list_head rx_submit_list;
+ struct list_head to_host_list;
+ struct urb *urb;
+ u8 *buf;
+ void *mux_dev;
+ u32 offset;
+ u32 len;
+ int (*callback)(void *data, int len, int tty_index, int minor, int complete);
+};
+
+struct rx_cxt {
+ struct list_head to_host_list;
+ struct list_head rx_submit_list;
+ struct list_head rx_free_list;
+ spinlock_t to_host_lock;
+ spinlock_t submit_list_lock;
+ spinlock_t free_list_lock;
+};
+
+struct mux_dev {
+ struct usb_device *usbdev;
+ struct usb_interface *control_intf;
+ struct usb_interface *data_intf;
+ struct rx_cxt rx;
+ struct delayed_work work_rx;
+ struct usb_interface *intf;
+ int usb_state;
+ int (*rx_cb)(void *data, int len, int tty_index, int minor, int complete);
+ spinlock_t write_lock;
+ u8 minor[2];
+};
+
+#endif /* _GDM_MUX_H_ */
diff --git a/drivers/staging/gdm724x/gdm_tty.c b/drivers/staging/gdm724x/gdm_tty.c
new file mode 100644
index 0000000..4d4040e
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_tty.c
@@ -0,0 +1,367 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/version.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb/cdc.h>
+#include <linux/serial.h>
+#include "gdm_tty.h"
+
+#define GDM_TTY_MAJOR 0
+#define GDM_TTY_MINOR 32
+
+#define ACM_CTRL_DTR 0x01
+#define ACM_CTRL_RTS 0x02
+#define ACM_CTRL_DSR 0x02
+#define ACM_CTRL_RI 0x08
+#define ACM_CTRL_DCD 0x01
+
+#define WRITE_SIZE 2048
+
+#define MUX_TX_MAX_SIZE 2048
+
+#define gdm_tty_send(n, d, l, i, c, b) (\
+ n->tty_dev->send_func(n->tty_dev->priv_dev, d, l, i, c, b))
+#define gdm_tty_recv(n, c) (\
+ n->tty_dev->recv_func(n->tty_dev->priv_dev, c))
+#define gdm_tty_send_control(n, r, v, d, l) (\
+ n->tty_dev->send_control(n->tty_dev->priv_dev, r, v, d, l))
+
+#define acm_set_comm_feature(n, v) \
+ gdm_tty_send_control(n, 0x02, v, NULL, 0)
+
+#define GDM_TTY_READY(tty_str) (tty_str && tty_str->tty_dev && tty_str->port.count)
+
+struct tty_driver *g_tty_drv[TTY_MAX_COUNT] = {NULL, };
+struct tty_str *g_tty_str[TTY_MAX_COUNT][GDM_TTY_MINOR] = {{NULL, }, };
+
+static char *DRIVER_STRING[TTY_MAX_COUNT] = {"GCTATC", "GCTDM"};
+static char *DEVICE_STRING[TTY_MAX_COUNT] = {"GCT-ATC", "GCT-DM"};
+
+static DEFINE_MUTEX(open_mutex);
+
+static struct tty_port_operations gdm_tty_port_ops = {
+};
+
+static int gdm_tty_open(struct tty_struct *tty, struct file *filp)
+{
+ struct tty_str *tty_str = NULL;
+ int i;
+ int ret = 0;
+
+ mutex_lock(&open_mutex);
+
+ for (i = 0; i < TTY_MAX_COUNT; i++) {
+ if (!strcmp(tty->driver->driver_name, DRIVER_STRING[i])) {
+ tty_str = g_tty_str[i][tty->index];
+ break;
+ }
+ }
+
+ if (!tty_str) {
+ printk(KERN_INFO "glte: no tty device\n");
+ mutex_unlock(&open_mutex);
+ return -ENODEV;
+ }
+
+ set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
+
+ tty->driver_data = tty_str;
+ tty_port_tty_set(&tty_str->port, tty);
+ tty_str->port.count++;
+ set_bit(ASYNCB_INITIALIZED, &tty_str->port.flags);
+ ret = tty_port_block_til_ready(&tty_str->port, tty, filp);
+
+ mutex_unlock(&open_mutex);
+
+ return ret;
+}
+
+static void gdm_tty_close(struct tty_struct *tty, struct file *filp)
+{
+ struct tty_str *tty_str = tty->driver_data;
+ int i;
+
+ if (!tty_str) {
+ printk(KERN_INFO "glte: tty device already close\n");
+ return;
+ }
+
+ if (tty_str->port.count != 0) {
+ tty_port_close_start(&tty_str->port, tty, filp);
+ tty_port_close_end(&tty_str->port, tty);
+
+ if (tty_str->port.count == 0)
+ tty_port_tty_set(&tty_str->port, NULL);
+ tty_str->port.tty = NULL;
+ }
+
+ if (!tty_str->tty_dev) {
+ for (i = 0; i < TTY_MAX_COUNT; i++) {
+ if (!strcmp(tty->driver->driver_name, DRIVER_STRING[i]))
+ break;
+ }
+
+ if (i < TTY_MAX_COUNT) {
+ tty_unregister_device(g_tty_drv[i], tty->index);
+ tty_port_tty_set(&tty_str->port, NULL);
+ kfree(tty_str);
+ g_tty_str[i][tty->index] = NULL;
+ }
+ }
+}
+
+static int gdm_tty_recv_complete(void *data, int len, int index, int minor, int complete)
+{
+ struct tty_str *tty_str = g_tty_str[index][minor];
+ struct tty_struct *tty;
+
+ if (!GDM_TTY_READY(tty_str)) {
+ if (complete == RECV_PACKET_PROCESS_COMPLETE)
+ gdm_tty_recv(tty_str, gdm_tty_recv_complete);
+ return TO_HOST_PORT_CLOSE;
+ }
+
+ if (!data || !len)
+ goto complete_routine;
+
+ tty = tty_port_tty_get(&tty_str->port);
+
+ if (tty_buffer_request_room(tty, len) == len) {
+ tty_insert_flip_string(tty, data, len);
+ tty_flip_buffer_push(tty);
+ } else {
+ tty_kref_put(tty);
+ return TO_HOST_BUFFER_REQUEST_FAIL;
+ }
+
+ tty_kref_put(tty);
+complete_routine:
+ if (complete == RECV_PACKET_PROCESS_COMPLETE)
+ gdm_tty_recv(tty_str, gdm_tty_recv_complete);
+
+ return TO_HOST_SUCCESS;
+}
+
+static void gdm_tty_send_complete(void *arg)
+{
+ struct tty_str *tty_str = (struct tty_str *)arg;
+ struct tty_struct *tty;
+
+ if (!GDM_TTY_READY(tty_str))
+ return;
+
+ tty = tty_port_tty_get(&tty_str->port);
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+}
+
+static int gdm_tty_write(struct tty_struct *tty, const unsigned char *buf, int len)
+{
+ struct tty_str *tty_str = tty->driver_data;
+ int remain = len;
+ int sent_len = 0;
+ int sending_len = 0;
+
+ if (!GDM_TTY_READY(tty_str))
+ return -ENODEV;
+
+ if (!len)
+ return 0;
+
+ while (1) {
+ sending_len = remain > MUX_TX_MAX_SIZE ? MUX_TX_MAX_SIZE : remain;
+ gdm_tty_send(tty_str,
+ (void *)(buf+sent_len),
+ sending_len,
+ tty_str->tty_drv_index,
+ gdm_tty_send_complete,
+ tty_str
+ );
+ sent_len += sending_len;
+ remain -= sending_len;
+ if (remain <= 0)
+ break;
+ }
+
+ return len;
+}
+
+static int gdm_tty_write_room(struct tty_struct *tty)
+{
+ struct tty_str *tty_str = tty->driver_data;
+
+ if (!GDM_TTY_READY(tty_str))
+ return -ENODEV;
+
+ return WRITE_SIZE;
+}
+
+static int gdm_tty_tiocmget(struct tty_struct *tty)
+{
+ struct tty_str *tty_str = tty->driver_data;
+
+ if (!GDM_TTY_READY(tty_str))
+ return -ENODEV;
+
+ return (0 & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
+ (0 & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
+ (0 & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
+ (0 & ACM_CTRL_RI ? TIOCM_RI : 0) |
+ (0 & ACM_CTRL_DCD ? TIOCM_CD : 0) |
+ TIOCM_CTS;
+}
+
+static int gdm_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear)
+{
+ struct tty_str *tty_str = tty->driver_data;
+
+ if (!GDM_TTY_READY(tty_str))
+ return -ENODEV;
+
+ return 1;
+}
+
+int register_lte_tty_device(struct tty_dev *tty_dev, struct device *dev)
+{
+ struct tty_str *tty_str;
+ int i, j;
+
+ for (i = 0; i < TTY_MAX_COUNT; i++) {
+ for (j = 0; j < GDM_TTY_MINOR; j++) {
+ if (!g_tty_str[i][j])
+ break;
+ }
+
+ if (j == GDM_TTY_MINOR) {
+ tty_dev->minor[i] = j;
+ return -1;
+ }
+
+ tty_str = kmalloc(sizeof(struct tty_str), GFP_KERNEL);
+ if (!tty_str)
+ return -ENOMEM;
+
+ g_tty_str[i][j] = tty_str;
+
+ tty_str->tty_dev = tty_dev;
+ tty_str->tty_drv_index = i;
+ tty_dev->minor[i] = j;
+ tty_port_init(&tty_str->port);
+ tty_str->port.ops = &gdm_tty_port_ops;
+
+ if (strcmp(DEVICE_STRING[i], "GCT-ATC") != 0)
+ dev = NULL;
+ tty_register_device(g_tty_drv[i], j, dev);
+ }
+
+ acm_set_comm_feature(tty_str, 1);
+
+ for (i = 0; i < MAX_ISSUE_NUM; i++)
+ gdm_tty_recv(tty_str, gdm_tty_recv_complete);
+
+ return 0;
+}
+
+void unregister_lte_tty_device(struct tty_dev *tty_dev)
+{
+ struct tty_str *tty_str;
+ int i;
+
+ for (i = 0; i < TTY_MAX_COUNT; i++) {
+ if (tty_dev->minor[i] >= GDM_TTY_MINOR)
+ continue;
+
+ tty_str = g_tty_str[i][tty_dev->minor[i]];
+ if (!tty_str)
+ continue;
+
+ tty_str->tty_dev = NULL;
+
+ if (!tty_str->port.count) {
+ tty_unregister_device(g_tty_drv[i], tty_dev->minor[i]);
+ tty_port_tty_set(&tty_str->port, NULL);
+ kfree(tty_str);
+ g_tty_str[i][tty_dev->minor[i]] = NULL;
+ }
+ }
+}
+
+static void gdm_tty_set_termios(struct tty_struct *tty, struct ktermios *termios_old)
+{
+ return;
+}
+
+static const struct tty_operations gdm_tty_ops = {
+ .open = gdm_tty_open,
+ .close = gdm_tty_close,
+ .write = gdm_tty_write,
+ .write_room = gdm_tty_write_room,
+ .tiocmget = gdm_tty_tiocmget,
+ .tiocmset = gdm_tty_tiocmset,
+ .set_termios = gdm_tty_set_termios,
+};
+
+int register_lte_tty_driver(void)
+{
+ struct tty_driver *tty_driver = NULL;
+ int i;
+ int ret;
+
+ for (i = 0; i < TTY_MAX_COUNT; i++) {
+ tty_driver = alloc_tty_driver(GDM_TTY_MINOR);
+ if (!tty_driver) {
+ printk(KERN_ERR "glte: alloc_tty_driver fail\n");
+ return -ENOMEM;
+ }
+
+ tty_driver->owner = THIS_MODULE;
+ tty_driver->driver_name = DRIVER_STRING[i];
+ tty_driver->name = DEVICE_STRING[i];
+ tty_driver->major = GDM_TTY_MAJOR;
+ tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ tty_driver->subtype = SERIAL_TYPE_NORMAL;
+ tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ tty_driver->init_termios = tty_std_termios;
+ tty_driver->init_termios.c_cflag = B9600 | CS8 | HUPCL | CLOCAL;
+ tty_driver->init_termios.c_lflag = ISIG | ICANON | IEXTEN;
+ tty_set_operations(tty_driver, &gdm_tty_ops);
+
+ ret = tty_register_driver(tty_driver);
+
+ g_tty_drv[i] = tty_driver;
+ }
+
+ return ret;
+}
+
+void unregister_lte_tty_driver(void)
+{
+ struct tty_driver *tty_driver;
+ int i;
+
+ for (i = 0; i < TTY_MAX_COUNT; i++) {
+ tty_driver = g_tty_drv[i];
+ if (tty_driver) {
+ tty_unregister_driver(tty_driver);
+ put_tty_driver(tty_driver);
+ }
+ }
+}
diff --git a/drivers/staging/gdm724x/gdm_tty.h b/drivers/staging/gdm724x/gdm_tty.h
new file mode 100644
index 0000000..bfe654e
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_tty.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _GDM_TTY_H_
+#define _GDM_TTY_H_
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/tty.h>
+
+
+#define TTY_MAX_COUNT 2
+
+#define MAX_ISSUE_NUM 3
+
+enum TO_HOST_RESULT {
+ TO_HOST_SUCCESS = 0,
+ TO_HOST_BUFFER_REQUEST_FAIL = 1,
+ TO_HOST_PORT_CLOSE = 2,
+ TO_HOST_INVALID_PACKET = 3,
+};
+
+enum RECV_PACKET_PROCESS {
+ RECV_PACKET_PROCESS_COMPLETE = 0,
+ RECV_PACKET_PROCESS_CONTINUE = 1,
+};
+
+struct tty_dev {
+ void *priv_dev;
+ int (*send_func)(void *priv_dev, void *data, int len, int tty_index,
+ void (*cb)(void *cb_data), void *cb_data);
+ int (*recv_func)(void *priv_dev, int (*cb)(void *data, int len, int tty_index, int minor, int complete));
+ int (*send_control)(void *priv_dev, int request, int value, void *data, int len);
+ u8 minor[2];
+};
+
+struct tty_str {
+ struct tty_dev *tty_dev;
+ int tty_drv_index;
+ struct tty_port port;
+};
+
+int register_lte_tty_driver(void);
+void unregister_lte_tty_driver(void);
+int register_lte_tty_device(struct tty_dev *tty_dev, struct device *dev);
+void unregister_lte_tty_device(struct tty_dev *tty_dev);
+
+#endif /* _GDM_USB_H_ */
+
diff --git a/drivers/staging/gdm724x/gdm_usb.c b/drivers/staging/gdm724x/gdm_usb.c
new file mode 100644
index 0000000..40d362e
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_usb.c
@@ -0,0 +1,1047 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/module.h>
+#include <linux/version.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 struct workqueue_struct *usb_tx_wq;
+static struct workqueue_struct *usb_rx_wq;
+
+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 = kmalloc(sizeof(struct usb_tx), GFP_ATOMIC);
+ if (!t) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ memset(t, 0, sizeof(struct usb_tx));
+
+ 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 = NULL;
+ int ret = 0;
+
+
+ t_sdu = kmalloc(sizeof(struct usb_tx_sdu), GFP_ATOMIC);
+ if (!t_sdu) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ memset(t_sdu, 0, sizeof(struct usb_tx_sdu));
+
+ t_sdu->buf = kmalloc(SDU_BUF_SIZE, GFP_ATOMIC);
+ if (!t_sdu->buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+out:
+
+ if (ret < 0) {
+ if (t_sdu) {
+ kfree(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(struct usb_rx), GFP_ATOMIC);
+ if (!r) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ r->urb = usb_alloc_urb(0, GFP_ATOMIC);
+ r->buf = kmalloc(RX_BUF_SIZE, GFP_ATOMIC);
+ 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 == NULL) {
+ 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 == NULL) {
+ 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:
+ return ret;
+}
+
+static int set_mac_address(u8 *data, void *arg)
+{
+ struct phy_dev *phy_dev = (struct 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)
+ printk(KERN_ERR "glte: 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 = (struct phy_dev *)r->cb_data;
+ udev = (struct lte_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) {
+ ret = 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)
+ printk(KERN_ERR "glte: 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);
+ queue_work(usb_rx_wq, &udev->work_rx.work);
+ spin_unlock_irqrestore(&rx->to_host_lock, flags);
+ } else {
+ if (urb->status && udev->usb_state == PM_NORMAL)
+ printk(KERN_ERR "glte: gdm_usb_rcv_complete urb status error %d\n", 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) {
+ printk(KERN_ERR "glte: invalid device\n");
+ return -ENODEV;
+ }
+
+ r = get_rx_struct(rx, &no_spc);
+ if (!r) {
+ printk(KERN_ERR "glte: 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);
+
+ printk(KERN_ERR "glte: usb_submit_urb fail (%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) {
+ printk(KERN_INFO "glte: 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;
+ queue_work(usb_tx_wq, &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)
+ printk(KERN_ERR "glte: usb_submit_urb fail %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;
+ } else {
+ 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);
+ 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)) {
+ printk(KERN_ERR "glte: send_tx_packet fail\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 dftEpsId, unsigned int epsId,
+ 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) {
+ printk(KERN_ERR "glte: 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 == NULL) {
+ printk(KERN_ERR "glte: 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->dftEpsId = gdm_cpu_to_dev32(&udev->gdm_ed, dftEpsId);
+ sdu->bearer_ID = gdm_cpu_to_dev32(&udev->gdm_ed, epsId);
+ 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);
+ queue_work(usb_tx_wq, &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) {
+ printk(KERN_ERR "glte: hci send - invalid device\n");
+ return -ENODEV;
+ }
+
+ t = alloc_tx_struct(len);
+ if (t == NULL) {
+ printk(KERN_ERR "glte: 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);
+ queue_work(usb_tx_wq, &udev->work_tx.work);
+ spin_unlock_irqrestore(&tx->lock, flags);
+
+ return 0;
+}
+
+static struct gdm_endian *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);
+
+ printk(KERN_INFO "glte: net vid = 0x%04x pid = 0x%04x\n", idVendor, idProduct);
+
+ if (bInterfaceNumber > NETWORK_INTERFACE) {
+ printk(KERN_INFO "glte: not a network device");
+ return -1;
+ }
+
+ phy_dev = kmalloc(sizeof(struct phy_dev), GFP_ATOMIC);
+ if (!phy_dev) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ udev = kmalloc(sizeof(struct lte_udev), GFP_ATOMIC);
+ if (!udev) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ memset(phy_dev, 0, sizeof(struct phy_dev));
+ memset(udev, 0, sizeof(struct lte_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) {
+ printk(KERN_ERR "glte: init_usb func fail\n");
+ goto out;
+ }
+ 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)
+ set_endian(&udev->gdm_ed, ENDIANNESS_BIG);
+ else
+ set_endian(&udev->gdm_ed, ENDIANNESS_LITTLE);
+
+ ret = request_mac_address(udev);
+ if (ret < 0) {
+ printk(KERN_ERR "glte: request Mac address failed\n");
+ goto out;
+ }
+
+ start_rx_proc(phy_dev);
+out:
+
+ if (ret < 0) {
+ kfree(phy_dev);
+ if (udev) {
+ release_usb(udev);
+ kfree(udev);
+ }
+ }
+
+ usb_get_dev(usbdev);
+ usb_set_intfdata(intf, phy_dev);
+
+ return ret;
+}
+
+static void gdm_usb_disconnect(struct usb_interface *intf)
+{
+ struct phy_dev *phy_dev;
+ struct lte_udev *udev;
+ u16 idVendor, idProduct;
+ struct usb_device *usbdev;
+ usbdev = interface_to_usbdev(intf);
+
+ idVendor = __le16_to_cpu(usbdev->descriptor.idVendor);
+ idProduct = __le16_to_cpu(usbdev->descriptor.idProduct);
+
+ 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) {
+ printk(KERN_ERR "glte: usb suspend - invalid state");
+ 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);
+
+ 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) {
+ printk(KERN_ERR "glte: usb resume - invalid state");
+ 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);
+ queue_work(usb_tx_wq, &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) {
+ printk(KERN_ERR "glte: error creating event\n");
+ return -1;
+ }
+
+ usb_tx_wq = create_workqueue("usb_tx_wq");
+ if (usb_tx_wq == NULL)
+ return -1;
+
+ usb_rx_wq = create_workqueue("usb_rx_wq");
+ if (usb_rx_wq == NULL)
+ 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);
+
+ if (usb_tx_wq) {
+ flush_workqueue(usb_tx_wq);
+ destroy_workqueue(usb_tx_wq);
+ }
+
+ if (usb_rx_wq) {
+ flush_workqueue(usb_rx_wq);
+ destroy_workqueue(usb_rx_wq);
+ }
+}
+
+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");
diff --git a/drivers/staging/gdm724x/gdm_usb.h b/drivers/staging/gdm724x/gdm_usb.h
new file mode 100644
index 0000000..38f6537
--- /dev/null
+++ b/drivers/staging/gdm724x/gdm_usb.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _GDM_USB_H_
+#define _GDM_USB_H_
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/usb.h>
+#include <linux/list.h>
+#include <linux/time.h>
+
+#include "gdm_endian.h"
+#include "hci_packet.h"
+
+#define PM_NORMAL 0
+#define PM_SUSPEND 1
+#define AUTO_SUSPEND_TIMER 5000 /* ms */
+
+#define RX_BUF_SIZE (1024*32)
+#define TX_BUF_SIZE (1024*32)
+#define SDU_BUF_SIZE 2048
+#define MAX_SDU_SIZE (1024*30)
+#define MAX_PACKET_IN_MULTI_SDU 256
+
+#define VID_GCT 0x1076
+#define PID_GDM7240 0x8000
+#define PID_GDM7243 0x9000
+
+#define NETWORK_INTERFACE 1
+#define USB_SC_SCSI 0x06
+#define USB_PR_BULK 0x50
+
+#define MAX_NUM_SDU_BUF 64
+
+struct usb_tx {
+ struct list_head list;
+ struct urb *urb;
+ u8 *buf;
+ u32 len;
+ void (*callback)(void *cb_data);
+ void *cb_data;
+ struct tx_cxt *tx;
+ u8 is_sdu;
+};
+
+struct usb_tx_sdu {
+ struct list_head list;
+ u8 *buf;
+ u32 len;
+ void (*callback)(void *cb_data);
+ void *cb_data;
+};
+
+struct usb_rx {
+ struct list_head to_host_list;
+ struct list_head free_list;
+ struct list_head rx_submit_list;
+ struct rx_cxt *rx;
+ struct urb *urb;
+ u8 *buf;
+ int (*callback)(void *cb_data, void *data, int len, int context);
+ void *cb_data;
+ void *index;
+};
+
+struct tx_cxt {
+ struct list_head sdu_list;
+ struct list_head hci_list;
+ struct list_head free_list;
+ u32 avail_count;
+ spinlock_t lock;
+};
+
+struct rx_cxt {
+ struct list_head to_host_list;
+ struct list_head rx_submit_list;
+ struct list_head free_list;
+ u32 avail_count;
+ spinlock_t to_host_lock;
+ spinlock_t rx_lock;
+ spinlock_t submit_lock;
+};
+
+struct lte_udev {
+ struct usb_device *usbdev;
+ struct gdm_endian gdm_ed;
+ struct tx_cxt tx;
+ struct rx_cxt rx;
+ struct delayed_work work_tx;
+ struct delayed_work work_rx;
+ u8 send_complete;
+ u8 tx_stop;
+ struct usb_interface *intf;
+ int (*rx_cb)(void *cb_data, void *data, int len, int context);
+ int usb_state;
+ u8 request_mac_addr;
+};
+
+#endif /* _GDM_USB_H_ */
diff --git a/drivers/staging/gdm724x/hci.h b/drivers/staging/gdm724x/hci.h
new file mode 100644
index 0000000..9a591b0
--- /dev/null
+++ b/drivers/staging/gdm724x/hci.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _HCI_H_
+#define _HCI_H_
+
+#define LTE_GET_INFORMATION 0x3002
+#define LTE_GET_INFORMATION_RESULT 0xB003
+ #define MAC_ADDRESS 0xA2
+
+#define LTE_LINK_ON_OFF_INDICATION 0xB133
+#define LTE_PDN_TABLE_IND 0xB143
+
+#define LTE_TX_SDU 0x3200
+#define LTE_RX_SDU 0xB201
+#define LTE_TX_MULTI_SDU 0x3202
+#define LTE_RX_MULTI_SDU 0xB203
+
+#define LTE_DL_SDU_FLOW_CONTROL 0x3305
+#define LTE_UL_SDU_FLOW_CONTROL 0xB306
+
+#define LTE_AT_CMD_TO_DEVICE 0x3307
+#define LTE_AT_CMD_FROM_DEVICE 0xB308
+
+#define LTE_SDIO_DM_SEND_PKT 0x3312
+#define LTE_SDIO_DM_RECV_PKT 0xB313
+
+#define LTE_NV_RESTORE_REQUEST 0xB30C
+#define LTE_NV_RESTORE_RESPONSE 0x330D
+#define LTE_NV_SAVE_REQUEST 0xB30E
+ #define NV_TYPE_LTE_INFO 0x00
+ #define NV_TYPE_BOARD_CONFIG 0x01
+ #define NV_TYPE_RF_CAL 0x02
+ #define NV_TYPE_TEMP 0x03
+ #define NV_TYPE_NET_INFO 0x04
+ #define NV_TYPE_SAFETY_INFO 0x05
+ #define NV_TYPE_CDMA_CAL 0x06
+ #define NV_TYPE_VENDOR 0x07
+ #define NV_TYPE_ALL 0xff
+#define LTE_NV_SAVE_RESPONSE 0x330F
+
+#define LTE_AT_CMD_TO_DEVICE_EXT 0x3323
+#define LTE_AT_CMD_FROM_DEVICE_EXT 0xB324
+
+#endif /* _HCI_H_ */
diff --git a/drivers/staging/gdm724x/hci_packet.h b/drivers/staging/gdm724x/hci_packet.h
new file mode 100644
index 0000000..7fba8a6
--- /dev/null
+++ b/drivers/staging/gdm724x/hci_packet.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _HCI_PACKET_H_
+#define _HCI_PACKET_H_
+
+#define HCI_HEADER_SIZE 4
+
+/*
+ * The NIC type definition:
+ * For backward compatibility, lower 16 bits used as they were.
+ * Lower 16 bit: NIC_TYPE values
+ * Uppoer 16 bit: NIC_TYPE Flags
+ */
+#define NIC_TYPE_NIC0 0x00000010
+#define NIC_TYPE_NIC1 0x00000011
+#define NIC_TYPE_NIC2 0x00000012
+#define NIC_TYPE_NIC3 0x00000013
+#define NIC_TYPE_ARP 0x00000100
+#define NIC_TYPE_ICMPV6 0x00000200
+#define NIC_TYPE_MASK 0x0000FFFF
+#define NIC_TYPE_F_IPV4 0x00010000
+#define NIC_TYPE_F_IPV6 0x00020000
+#define NIC_TYPE_F_DHCP 0x00040000
+#define NIC_TYPE_F_NDP 0x00080000
+#define NIC_TYPE_F_VLAN 0x00100000
+
+struct hci_packet {
+ u16 cmd_evt;
+ u16 len;
+ u8 data[0];
+} __packed;
+
+struct tlv {
+ u8 type;
+ u8 len;
+ u8 *data[1];
+} __packed;
+
+struct sdu_header {
+ u16 cmd_evt;
+ u16 len;
+ u32 dftEpsId;
+ u32 bearer_ID;
+ u32 nic_type;
+} __packed;
+
+struct sdu {
+ u16 cmd_evt;
+ u16 len;
+ u32 dftEpsId;
+ u32 bearer_ID;
+ u32 nic_type;
+ u8 data[0];
+} __packed;
+
+struct multi_sdu {
+ u16 cmd_evt;
+ u16 len;
+ u16 num_packet;
+ u16 reserved;
+ u8 data[0];
+} __packed;
+
+struct hci_pdn_table_ind {
+ u16 cmd_evt;
+ u16 len;
+ u8 activate;
+ u32 dft_eps_id;
+ u32 nic_type;
+ u8 pdn_type;
+ u8 ipv4_addr[4];
+ u8 ipv6_intf_id[8];
+} __packed;
+
+struct hci_connect_ind {
+ u16 cmd_evt;
+ u16 len;
+ u32 connect;
+} __packed;
+
+
+#endif /* _HCI_PACKET_H_ */
diff --git a/drivers/staging/gdm724x/lte_ioctl.h b/drivers/staging/gdm724x/lte_ioctl.h
new file mode 100644
index 0000000..4f890e5
--- /dev/null
+++ b/drivers/staging/gdm724x/lte_ioctl.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _LTE_IOCTL_H_
+#define _LTE_IOCTL_H_
+
+#define SIOCLTEIOCTL SIOCDEVPRIVATE
+#define SIOCG_DATA 0x8D10
+#define SIOCS_DATA 0x8D11
+
+/*
+ * For historical reason, ioctl number and structure must be maintained
+ */
+enum {
+ LINK_ON,
+ LINK_OFF,
+ GET_NETWORK_STATICS,
+ RX_STOP,
+ RX_RESUME,
+ GET_DRV_VER,
+ GET_SDIO_DEVICE_STATUS,
+ GET_ENDIAN_INFO,
+};
+
+struct dev_endian_t {
+ unsigned char dev_endian;
+ unsigned char host_endian;
+} __packed;
+
+struct data_t {
+ long len;
+ void *buf;
+} __packed;
+
+struct wm_req_t {
+ union {
+ char ifrn_name[IFNAMSIZ];
+ } ifr_ifrn;
+ unsigned short cmd;
+ unsigned short data_id;
+ struct data_t data;
+} __packed;
+
+#ifndef ifr_name
+#define ifr_name (ifr_ifrn.ifrm_name)
+#endif
+
+#endif /* _LTE_IOCTL_H_ */
diff --git a/drivers/staging/gdm724x/netlink_k.c b/drivers/staging/gdm724x/netlink_k.c
new file mode 100644
index 0000000..9819bf0
--- /dev/null
+++ b/drivers/staging/gdm724x/netlink_k.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/version.h>
+#include <linux/export.h>
+#include <linux/etherdevice.h>
+#include <linux/netlink.h>
+#include <asm/byteorder.h>
+#include <net/sock.h>
+
+#include "netlink_k.h"
+
+#if defined(DEFINE_MUTEX)
+static DEFINE_MUTEX(netlink_mutex);
+#else
+static struct semaphore netlink_mutex;
+#define mutex_lock(x) down(x)
+#define mutex_unlock(x) up(x)
+#endif
+
+#define ND_MAX_GROUP 30
+#define ND_IFINDEX_LEN sizeof(int)
+#define ND_NLMSG_SPACE(len) (NLMSG_SPACE(len) + ND_IFINDEX_LEN)
+#define ND_NLMSG_DATA(nlh) ((void *)((char *)NLMSG_DATA(nlh) + ND_IFINDEX_LEN))
+#define ND_NLMSG_S_LEN(len) (len+ND_IFINDEX_LEN)
+#define ND_NLMSG_R_LEN(nlh) (nlh->nlmsg_len-ND_IFINDEX_LEN)
+#define ND_NLMSG_IFIDX(nlh) NLMSG_DATA(nlh)
+#define ND_MAX_MSG_LEN (1024 * 32)
+
+static void (*rcv_cb)(struct net_device *dev, u16 type, void *msg, int len);
+
+static void netlink_rcv_cb(struct sk_buff *skb)
+{
+ struct nlmsghdr *nlh;
+ struct net_device *dev;
+ u32 mlen;
+ void *msg;
+ int ifindex;
+
+ if (!rcv_cb) {
+ printk(KERN_ERR "glte: nl cb - unregistered\n");
+ return;
+ }
+
+ if (skb->len < NLMSG_SPACE(0)) {
+ printk(KERN_ERR "glte: nl cb - invalid skb length\n");
+ return;
+ }
+
+ nlh = (struct nlmsghdr *)skb->data;
+
+ if (skb->len < nlh->nlmsg_len || nlh->nlmsg_len > ND_MAX_MSG_LEN) {
+ printk(KERN_ERR "glte: nl cb - invalid length (%d,%d)\n",
+ skb->len, nlh->nlmsg_len);
+ return;
+ }
+
+ memcpy(&ifindex, ND_NLMSG_IFIDX(nlh), ND_IFINDEX_LEN);
+ msg = ND_NLMSG_DATA(nlh);
+ mlen = ND_NLMSG_R_LEN(nlh);
+
+ dev = dev_get_by_index(&init_net, ifindex);
+ if (dev) {
+ rcv_cb(dev, nlh->nlmsg_type, msg, mlen);
+ dev_put(dev);
+ } else {
+ printk(KERN_ERR "glte: nl cb - dev (%d) not found\n", ifindex);
+ }
+}
+
+static void netlink_rcv(struct sk_buff *skb)
+{
+ mutex_lock(&netlink_mutex);
+ netlink_rcv_cb(skb);
+ mutex_unlock(&netlink_mutex);
+}
+
+struct sock *netlink_init(int unit,
+ void (*cb)(struct net_device *dev, u16 type, void *msg, int len))
+{
+ struct sock *sock;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
+ struct netlink_kernel_cfg cfg = {
+ .input = netlink_rcv,
+ };
+#endif
+
+#if !defined(DEFINE_MUTEX)
+ init_MUTEX(&netlink_mutex);
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 6, 0)
+ sock = netlink_kernel_create(&init_net, unit, 0, netlink_rcv, NULL,
+ THIS_MODULE);
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 0)
+ sock = netlink_kernel_create(&init_net, unit, THIS_MODULE, &cfg);
+#else
+ sock = netlink_kernel_create(&init_net, unit, &cfg);
+#endif
+
+ if (sock)
+ rcv_cb = cb;
+
+ return sock;
+}
+
+void netlink_exit(struct sock *sock)
+{
+ sock_release(sock->sk_socket);
+}
+
+int netlink_send(struct sock *sock, int group, u16 type, void *msg, int len)
+{
+ static u32 seq;
+ struct sk_buff *skb = NULL;
+ struct nlmsghdr *nlh;
+ int ret = 0;
+
+ if (group > ND_MAX_GROUP)
+ return -EINVAL;
+
+ if (!netlink_has_listeners(sock, group+1))
+ return -ESRCH;
+
+ skb = alloc_skb(NLMSG_SPACE(len), GFP_ATOMIC);
+ if (!skb)
+ return -ENOMEM;
+
+ seq++;
+
+ nlh = nlmsg_put(skb, 0, seq, type, len, 0);
+ memcpy(NLMSG_DATA(nlh), msg, len);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 0)
+ NETLINK_CB(skb).pid = 0;
+#else
+ NETLINK_CB(skb).portid = 0;
+#endif
+ NETLINK_CB(skb).dst_group = 0;
+
+ ret = netlink_broadcast(sock, skb, 0, group+1, GFP_ATOMIC);
+ if (!ret)
+ return len;
+
+ if (ret != -ESRCH)
+ printk(KERN_ERR "glte: nl broadcast g=%d, t=%d, l=%d, r=%d\n",
+ group, type, len, ret);
+ else if (netlink_has_listeners(sock, group+1))
+ return -EAGAIN;
+
+ return ret;
+}
diff --git a/drivers/staging/gdm724x/netlink_k.h b/drivers/staging/gdm724x/netlink_k.h
new file mode 100644
index 0000000..589486d
--- /dev/null
+++ b/drivers/staging/gdm724x/netlink_k.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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 _NETLINK_K_H
+#define _NETLINK_K_H
+
+#include <linux/netdevice.h>
+#include <net/sock.h>
+
+struct sock *netlink_init(int unit,
+ void (*cb)(struct net_device *dev, u16 type, void *msg, int len));
+void netlink_exit(struct sock *sock);
+int netlink_send(struct sock *sock, int group, u16 type, void *msg, int len);
+
+#endif /* _NETLINK_K_H_ */
--
1.7.10.4


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