diff options
Diffstat (limited to 'kernel/drivers/staging/gdm724x/gdm_lte.c')
| -rw-r--r-- | kernel/drivers/staging/gdm724x/gdm_lte.c | 947 |
1 files changed, 947 insertions, 0 deletions
diff --git a/kernel/drivers/staging/gdm724x/gdm_lte.c b/kernel/drivers/staging/gdm724x/gdm_lte.c new file mode 100644 index 000000000..a8d2cffb4 --- /dev/null +++ b/kernel/drivers/staging/gdm724x/gdm_lte.c @@ -0,0 +1,947 @@ +/* + * 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. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#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/in6.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" + +/* + * Netlink protocol number + */ +#define NETLINK_LTE 30 + +/* + * Default MTU Size + */ +#define DEFAULT_MTU_SIZE 1500 + +#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) { + nic->stats.rx_dropped++; + } else { + nic->stats.rx_packets++; + nic->stats.rx_bytes += skb->len + ETH_HLEN; + } + + return 0; +} + +static 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(ð, skb_in->data, sizeof(struct ethhdr)); + mac_header_data = ð + 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; +} + +static 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 < ARRAY_SIZE(pseudo_header.pa); 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; +} + +static 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(ð, skb_in->data, sizeof(struct ethhdr)); + if (ntohs(eth.h_proto) != ETH_P_IPV6) + return -1; + mac_header_data = ð + 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; + /* R=0, S=1, O=1 */ + icmp6_out.icmp6_dataun.un_data32[0] = htonl(0x60000000); + + 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_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) { + netdev_err(dev, "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 response 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 compatibility 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; + + ret = sscanf(dev->name, "lte%d", &idx); + if (ret != 1) { + dev_kfree_skb(skb); + return -EINVAL; + } + + ret = nic->phy_dev->send_sdu_func(nic->phy_dev->priv_dev, + data_buf, data_len, + nic->pdn_table.dft_eps_id, 0, + 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 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; + int ret; + + ret = sscanf(dev->name, "lte%d", &idx); + if (ret != 1) + return -EINVAL; + + return netlink_send(lte_event.sock, idx, 0, buf, + gdm_dev16_to_cpu( + nic->phy_dev->get_endian( + nic->phy_dev->priv_dev), 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); + + nic->phy_dev->send_hci_func(nic->phy_dev->priv_dev, msg, len, NULL, + NULL); +} + +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; + } + + pr_err("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); + ether_addr_copy(nic->dest_mac_addr, addr); + } + } + + if (nic->vlan_id > 0) { + mac_header_data = (void *)&vlan_eth; + mac_header_len = VLAN_ETH_HLEN; + } else { + mac_header_data = (void *)ð + mac_header_len = ETH_HLEN; + } + + /* Format the data so that it can be put to skb */ + ether_addr_copy(mac_header_data, nic->dest_mac_addr); + 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 { + netdev_err(dev, "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) { + pr_err("rx sdu wrong hci %04x\n", cmd_evt); + return; + } + if (hci_len < 12) { + pr_err("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 { + pr_err("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( + nic->phy_dev->get_endian( + nic->phy_dev->priv_dev), + pdn_table->dft_eps_id); + nic->pdn_table.nic_type = gdm_dev32_to_cpu( + nic->phy_dev->get_endian( + nic->phy_dev->priv_dev), + pdn_table->nic_type); + + netdev_info(dev, "pdn activated, nic_type=0x%x\n", + nic->pdn_table.nic_type); + } else { + memset(&nic->pdn_table, 0x00, sizeof(struct pdn_table)); + netdev_info(dev, "pdn deactivated\n"); + } +} + +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: + netdev_info(dev, "link %s\n", + ((struct hci_connect_ind *)buf)->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++) + phy_dev->rcv_func(phy_dev->priv_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, +}; + +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) + ether_addr_copy(dev_addr, gdm_lte_macaddr); + else + ether_addr_copy(dev_addr, mac_address); + + /* 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*/ + ether_addr_copy(nic_dest, dev_addr); +} + +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)) { + pr_err("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, + NET_NAME_UNKNOWN, ether_setup); + if (!net) { + pr_err("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); + } +} |