diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/staging/gdm724x | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/staging/gdm724x')
-rw-r--r-- | drivers/staging/gdm724x/Kconfig | 16 | ||||
-rw-r--r-- | drivers/staging/gdm724x/Makefile | 8 | ||||
-rw-r--r-- | drivers/staging/gdm724x/TODO | 16 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_endian.c | 37 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_endian.h | 30 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_lte.c | 937 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_lte.h | 71 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_mux.c | 668 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_mux.h | 85 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_tty.c | 315 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_tty.h | 60 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_usb.c | 1012 | ||||
-rw-r--r-- | drivers/staging/gdm724x/gdm_usb.h | 99 | ||||
-rw-r--r-- | drivers/staging/gdm724x/hci.h | 45 | ||||
-rw-r--r-- | drivers/staging/gdm724x/hci_packet.h | 82 | ||||
-rw-r--r-- | drivers/staging/gdm724x/netlink_k.c | 128 | ||||
-rw-r--r-- | drivers/staging/gdm724x/netlink_k.h | 16 |
17 files changed, 3625 insertions, 0 deletions
diff --git a/drivers/staging/gdm724x/Kconfig b/drivers/staging/gdm724x/Kconfig new file mode 100644 index 0000000000..1f403ecd96 --- /dev/null +++ b/drivers/staging/gdm724x/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# GCT GDM724x LTE driver configuration +# + +config LTE_GDM724X + tristate "GCT GDM724x LTE support" + depends on NET && USB && TTY && m + 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 0000000000..e61b95788c --- /dev/null +++ b/drivers/staging/gdm724x/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0 +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 0000000000..b2b571ecb0 --- /dev/null +++ b/drivers/staging/gdm724x/TODO @@ -0,0 +1,16 @@ +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() +- fix up static tty port allocation to be dynamic + +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 0000000000..ae39e59daf --- /dev/null +++ b/drivers/staging/gdm724x/gdm_endian.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#include <linux/kernel.h> +#include "gdm_endian.h" + +__dev16 gdm_cpu_to_dev16(u8 dev_ed, u16 x) +{ + if (dev_ed == ENDIANNESS_LITTLE) + return (__force __dev16)cpu_to_le16(x); + else + return (__force __dev16)cpu_to_be16(x); +} + +u16 gdm_dev16_to_cpu(u8 dev_ed, __dev16 x) +{ + if (dev_ed == ENDIANNESS_LITTLE) + return le16_to_cpu((__force __le16)x); + else + return be16_to_cpu((__force __be16)x); +} + +__dev32 gdm_cpu_to_dev32(u8 dev_ed, u32 x) +{ + if (dev_ed == ENDIANNESS_LITTLE) + return (__force __dev32)cpu_to_le32(x); + else + return (__force __dev32)cpu_to_be32(x); +} + +u32 gdm_dev32_to_cpu(u8 dev_ed, __dev32 x) +{ + if (dev_ed == ENDIANNESS_LITTLE) + return le32_to_cpu((__force __le32)x); + else + return be32_to_cpu((__force __be32)x); +} diff --git a/drivers/staging/gdm724x/gdm_endian.h b/drivers/staging/gdm724x/gdm_endian.h new file mode 100644 index 0000000000..f373dc3a19 --- /dev/null +++ b/drivers/staging/gdm724x/gdm_endian.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#ifndef __GDM_ENDIAN_H__ +#define __GDM_ENDIAN_H__ + +#include <linux/types.h> + +/* + * For data in "device-endian" byte order (device endianness is model + * dependent). Analogous to __leXX or __beXX. + */ +typedef __u32 __bitwise __dev32; +typedef __u16 __bitwise __dev16; + +enum { + ENDIANNESS_MIN = 0, + ENDIANNESS_UNKNOWN, + ENDIANNESS_LITTLE, + ENDIANNESS_BIG, + ENDIANNESS_MIDDLE, + ENDIANNESS_MAX +}; + +__dev16 gdm_cpu_to_dev16(u8 dev_ed, u16 x); +u16 gdm_dev16_to_cpu(u8 dev_ed, __dev16 x); +__dev32 gdm_cpu_to_dev32(u8 dev_ed, u32 x); +u32 gdm_dev32_to_cpu(u8 dev_ed, __dev32 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 0000000000..5703a9ddb6 --- /dev/null +++ b/drivers/staging/gdm724x/gdm_lte.c @@ -0,0 +1,937 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#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 <linux/errno.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, len; + + len = skb->len + ETH_HLEN; + ret = netif_rx(skb); + if (ret == NET_RX_DROP) { + nic->stats.rx_dropped++; + } else { + nic->stats.rx_packets++; + nic->stats.rx_bytes += len; + } + + 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; + + /* Check for skb->len, discard if empty */ + if (skb_in->len == 0) + return -ENODATA; + + /* 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); + + skb_put_data(skb_out, mac_header_data, mac_header_len); + skb_put_data(skb_out, arp_out, sizeof(struct arphdr)); + skb_put_data(skb_out, 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 __sum16 icmp6_checksum(struct ipv6hdr *ipv6, u16 *ptr, int len) +{ + unsigned short *w; + __wsum sum = 0; + int i; + u16 pa; + + 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 = be16_to_cpu(ipv6->payload_len); + pseudo_header.ph.ph_nxt = ipv6->nexthdr; + + for (i = 0; i < ARRAY_SIZE(pseudo_header.pa); i++) { + pa = pseudo_header.pa[i]; + sum = csum_add(sum, csum_unfold((__force __sum16)pa)); + } + + w = ptr; + while (len > 1) { + sum = csum_add(sum, csum_unfold((__force __sum16)*w++)); + len -= 2; + } + + return csum_fold(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 -EPROTONOSUPPORT; + 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 -EPROTONOSUPPORT; + 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 -EPROTONOSUPPORT; + + /* 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 -EPROTONOSUPPORT; + } 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 -EINVAL; + } + + /* 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); + + skb_put_data(skb_out, mac_header_data, mac_header_len); + skb_put_data(skb_out, &ipv6_out, sizeof(struct ipv6hdr)); + skb_put_data(skb_out, &icmp6_out, sizeof(struct icmp6hdr)); + skb_put_data(skb_out, &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; + + /* 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 = skb_vlan_eth_hdr(skb); + 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 = network_data; + + /* Check DHCPv4 */ + if (ip->protocol == IPPROTO_UDP) { + struct udphdr *udp = + 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 = network_data; + + if (ipv6->nexthdr == IPPROTO_ICMPV6) /* Check NDP request */ { + struct icmp6hdr *icmp6 = + 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 = + 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 netdev_tx_t 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 -EMEDIUMTYPE; + } + + 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 = skb_vlan_eth_hdr(skb); + + 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 phy_dev *phy_dev = ((struct nic *)netdev_priv(dev))->phy_dev; + struct hci_packet *hci = (struct hci_packet *)buf; + int length; + int idx; + int ret; + + ret = sscanf(dev->name, "lte%d", &idx); + if (ret != 1) + return -EINVAL; + + length = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev), + hci->len) + HCI_HEADER_SIZE; + return netlink_send(lte_event.sock, idx, 0, buf, length, dev); +} + +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 -ENODATA; +} + +void gdm_lte_event_exit(void) +{ + if (lte_event.sock && --lte_event.ref_cnt == 0) { + sock_release(lte_event.sock->sk_socket); + lte_event.sock = NULL; + } +} + +static int find_dev_index(u32 nic_type) +{ + u8 index; + + index = (u8)(nic_type & 0x0000000f); + if (index >= MAX_NIC_TYPE) + return -EINVAL; + + 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; + int offset = sizeof(struct iphdr) + + sizeof(struct udphdr) + + offsetof(struct dhcp_packet, chaddr); + if (offset + ETH_ALEN > len) + return; + ether_addr_copy(nic->dest_mac_addr, buf + offset); + } + } + + 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); + + skb_put_data(skb, mac_header_data, mac_header_len); + skb_put_data(skb, 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 endian = phy_dev->get_endian(phy_dev->priv_dev); + u8 *data = (u8 *)multi_sdu->data; + int copied; + u16 i = 0; + u16 num_packet; + u16 hci_len; + u16 cmd_evt; + u32 nic_type; + int index; + + num_packet = gdm_dev16_to_cpu(endian, multi_sdu->num_packet); + + for (i = 0; i < num_packet; i++) { + copied = data - multi_sdu->data; + if (len < copied + sizeof(*sdu)) { + pr_err("rx prevent buffer overflow"); + return; + } + + sdu = (struct sdu *)data; + + cmd_evt = gdm_dev16_to_cpu(endian, sdu->cmd_evt); + hci_len = gdm_dev16_to_cpu(endian, sdu->len); + nic_type = gdm_dev32_to_cpu(endian, sdu->nic_type); + + if (cmd_evt != LTE_RX_SDU) { + pr_err("rx sdu wrong hci %04x\n", cmd_evt); + return; + } + if (hci_len < 12 || + len < copied + sizeof(*sdu) + (hci_len - 12)) { + pr_err("rx sdu invalid len %d\n", hci_len); + return; + } + + index = find_dev_index(nic_type); + if (index < 0) { + pr_err("rx sdu invalid nic_type :%x\n", nic_type); + return; + } + dev = phy_dev->dev[index]; + gdm_lte_netif_rx(dev, (char *)sdu->data, + (int)(hci_len - 12), 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; + u8 ed = nic->phy_dev->get_endian(nic->phy_dev->priv_dev); + + if (!pdn_table->activate) { + memset(&nic->pdn_table, 0x00, sizeof(struct pdn_table)); + netdev_info(dev, "pdn deactivated\n"); + + return; + } + + nic->pdn_table.activate = pdn_table->activate; + nic->pdn_table.dft_eps_id = gdm_dev32_to_cpu(ed, pdn_table->dft_eps_id); + nic->pdn_table.nic_type = gdm_dev32_to_cpu(ed, pdn_table->nic_type); + + netdev_info(dev, "pdn activated, nic_type=0x%x\n", + nic->pdn_table.nic_type); +} + +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; + u8 endian = phy_dev->get_endian(phy_dev->priv_dev); + int ret = 0; + u16 cmd_evt; + u32 nic_type; + int index; + + if (!len) + return ret; + + cmd_evt = gdm_dev16_to_cpu(endian, hci->cmd_evt); + + dev = phy_dev->dev[0]; + if (!dev) + return 0; + + switch (cmd_evt) { + case LTE_RX_SDU: + sdu = (struct sdu *)hci->data; + nic_type = gdm_dev32_to_cpu(endian, sdu->nic_type); + index = find_dev_index(nic_type); + if (index < 0) + return index; + 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(endian, pdn_table->nic_type); + index = find_dev_index(nic_type); + if (index < 0) + return index; + dev = phy_dev->dev[index]; + gdm_lte_pdn_table(dev, buf, len); + fallthrough; + 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 = arg; + + return gdm_lte_receive_pkt(phy_dev, 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 const 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 + */ + eth_random_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]; + u8 addr[ETH_ALEN]; + 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) { + 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(addr, + nic->src_mac_addr, + nic->dest_mac_addr, + mac_address, + index); + eth_hw_addr_set(net, addr); + + 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) + 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 0000000000..f2143a6e0e --- /dev/null +++ b/drivers/staging/gdm724x/gdm_lte.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#ifndef _GDM_LTE_H_ +#define _GDM_LTE_H_ + +#include <linux/netdevice.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 dft_eps_id, unsigned int eps_id, + 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); + u8 (*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 0000000000..9b12619671 --- /dev/null +++ b/drivers/staging/gdm724x/gdm_mux.c @@ -0,0 +1,668 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/usb.h> +#include <linux/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" + +static u16 packet_type_for_tty_index[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); + +static int packet_type_to_tty_index(u16 packet_type) +{ + int i; + + for (i = 0; i < TTY_MAX_COUNT; i++) { + if (packet_type_for_tty_index[i] == packet_type) + return i; + } + + return -1; +} + +static struct mux_tx *alloc_mux_tx(int len) +{ + struct mux_tx *t; + + t = kzalloc(sizeof(*t), 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; + + r = kzalloc(sizeof(*r), GFP_KERNEL); + if (!r) + return NULL; + + r->urb = usb_alloc_urb(0, GFP_KERNEL); + r->buf = kmalloc(MUX_RX_MAX_SIZE, GFP_KERNEL); + 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 = r->mux_dev; + struct mux_pkt_header *mux_header; + unsigned int start_flag; + unsigned int payload_size; + unsigned short packet_type; + int total_len; + 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) { + pr_err("invalid START_FLAG %x\n", start_flag); + break; + } + + total_len = ALIGN(MUX_HEADER_SIZE + payload_size, 4); + + if (len - packet_size_sum < total_len) { + pr_err("invalid payload : %d %d %04x\n", + payload_size, len, packet_type); + break; + } + + index = packet_type_to_tty_index(packet_type); + if (index < 0) { + pr_err("invalid index %d\n", index); + break; + } + + ret = r->callback(mux_header->data, + payload_size, + index, + mux_dev->tty_dev, + RECV_PACKET_PROCESS_CONTINUE + ); + if (ret == TO_HOST_BUFFER_REQUEST_FAIL) { + r->offset += packet_size_sum; + break; + } + + packet_size_sum += total_len; + if (len - packet_size_sum <= MUX_HEADER_SIZE + 2) { + ret = r->callback(NULL, + 0, + index, + mux_dev->tty_dev, + 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 = &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) + pr_err("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 = 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) + dev_err(&urb->dev->dev, "%s: urb status error %d\n", + __func__, 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); + schedule_work(&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, + struct tty_dev *tty_dev, 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) { + pr_err("device is disconnected\n"); + return -ENODEV; + } + + r = get_rx_struct(rx); + if (!r) { + pr_err("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); + + pr_err("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) { + dev_info(&urb->dev->dev, "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 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); + + total_len = ALIGN(MUX_HEADER_SIZE + len, 4); + + t = alloc_mux_tx(total_len); + if (!t) { + pr_err("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_for_tty_index[tty_index]); + + memcpy(t->buf + MUX_HEADER_SIZE, data, len); + memset(t->buf + MUX_HEADER_SIZE + len, 0, + total_len - MUX_HEADER_SIZE - len); + + 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_ATOMIC); + + spin_unlock_irqrestore(&mux_dev->write_lock, flags); + + if (ret) + pr_err("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) + pr_err("usb_control_msg error: %d\n", ret); + + return min(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) { + 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; + struct tty_dev *tty_dev; + u16 idVendor, idProduct; + int bInterfaceNumber; + int ret; + 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); + + pr_info("mux vid = 0x%04x pid = 0x%04x\n", idVendor, idProduct); + + if (bInterfaceNumber != 2) + return -ENODEV; + + mux_dev = kzalloc(sizeof(*mux_dev), GFP_KERNEL); + if (!mux_dev) + return -ENOMEM; + + tty_dev = kzalloc(sizeof(*tty_dev), GFP_KERNEL); + if (!tty_dev) { + ret = -ENOMEM; + goto err_free_mux; + } + + mux_dev->usbdev = usbdev; + mux_dev->control_intf = intf; + + ret = init_usb(mux_dev); + if (ret) + goto err_free_usb; + + 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; + + ret = register_lte_tty_device(tty_dev, &intf->dev); + if (ret) + goto err_unregister_tty; + + for (i = 0; i < TTY_MAX_COUNT; i++) + mux_dev->tty_dev = tty_dev; + + mux_dev->intf = intf; + mux_dev->usb_state = PM_NORMAL; + + usb_get_dev(usbdev); + usb_set_intfdata(intf, tty_dev); + + return 0; + +err_unregister_tty: + unregister_lte_tty_device(tty_dev); +err_free_usb: + release_usb(mux_dev); + kfree(tty_dev); +err_free_mux: + kfree(mux_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; + + cancel_work_sync(&mux_dev->work_rx.work); + + if (mux_dev->usb_state != PM_NORMAL) { + dev_err(intf->usb_dev, "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) { + dev_err(intf->usb_dev, "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) +{ + int ret; + + ret = register_lte_tty_driver(); + if (ret) + return ret; + + return usb_register(&gdm_mux_driver); +} + +static void __exit gdm_usb_mux_exit(void) +{ + usb_deregister(&gdm_mux_driver); + unregister_lte_tty_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 0000000000..87b8d921fd --- /dev/null +++ b/drivers/staging/gdm724x/gdm_mux.h @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#ifndef _GDM_MUX_H_ +#define _GDM_MUX_H_ + +#include <linux/types.h> +#include <linux/usb.h> +#include <linux/list.h> + +#include "gdm_tty.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 { + __le32 start_flag; + __le32 seq_num; + __le32 payload_size; + __le16 packet_type; + unsigned char data[]; +}; + +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, + struct tty_dev *tty_dev, + 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, + struct tty_dev *tty_dev, + int complete); + spinlock_t write_lock; + struct tty_dev *tty_dev; +}; + +#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 0000000000..32b2e817ff --- /dev/null +++ b/drivers/staging/gdm724x/gdm_tty.c @@ -0,0 +1,315 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/errno.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 WRITE_SIZE 2048 + +#define MUX_TX_MAX_SIZE 2048 + +static inline bool gdm_tty_ready(struct gdm *gdm) +{ + return gdm && gdm->tty_dev && gdm->port.count; +} + +static struct tty_driver *gdm_driver[TTY_MAX_COUNT]; +static struct gdm *gdm_table[TTY_MAX_COUNT][GDM_TTY_MINOR]; +static DEFINE_MUTEX(gdm_table_lock); + +static const char *DRIVER_STRING[TTY_MAX_COUNT] = {"GCTATC", "GCTDM"}; +static char *DEVICE_STRING[TTY_MAX_COUNT] = {"GCT-ATC", "GCT-DM"}; + +static void gdm_port_destruct(struct tty_port *port) +{ + struct gdm *gdm = container_of(port, struct gdm, port); + + mutex_lock(&gdm_table_lock); + gdm_table[gdm->index][gdm->minor] = NULL; + mutex_unlock(&gdm_table_lock); + + kfree(gdm); +} + +static const struct tty_port_operations gdm_port_ops = { + .destruct = gdm_port_destruct, +}; + +static int gdm_tty_install(struct tty_driver *driver, struct tty_struct *tty) +{ + struct gdm *gdm = NULL; + int ret; + + ret = match_string(DRIVER_STRING, TTY_MAX_COUNT, + tty->driver->driver_name); + if (ret < 0) + return -ENODEV; + + mutex_lock(&gdm_table_lock); + gdm = gdm_table[ret][tty->index]; + if (!gdm) { + mutex_unlock(&gdm_table_lock); + return -ENODEV; + } + + tty_port_get(&gdm->port); + + ret = tty_standard_install(driver, tty); + if (ret) { + tty_port_put(&gdm->port); + mutex_unlock(&gdm_table_lock); + return ret; + } + + tty->driver_data = gdm; + mutex_unlock(&gdm_table_lock); + + return 0; +} + +static int gdm_tty_open(struct tty_struct *tty, struct file *filp) +{ + struct gdm *gdm = tty->driver_data; + + return tty_port_open(&gdm->port, tty, filp); +} + +static void gdm_tty_cleanup(struct tty_struct *tty) +{ + struct gdm *gdm = tty->driver_data; + + tty_port_put(&gdm->port); +} + +static void gdm_tty_hangup(struct tty_struct *tty) +{ + struct gdm *gdm = tty->driver_data; + + tty_port_hangup(&gdm->port); +} + +static void gdm_tty_close(struct tty_struct *tty, struct file *filp) +{ + struct gdm *gdm = tty->driver_data; + + tty_port_close(&gdm->port, tty, filp); +} + +static int gdm_tty_recv_complete(void *data, + int len, + int index, + struct tty_dev *tty_dev, + int complete) +{ + struct gdm *gdm = tty_dev->gdm[index]; + + if (!gdm_tty_ready(gdm)) { + if (complete == RECV_PACKET_PROCESS_COMPLETE) + gdm->tty_dev->recv_func(gdm->tty_dev->priv_dev, + gdm_tty_recv_complete); + return TO_HOST_PORT_CLOSE; + } + + if (data && len) { + if (tty_buffer_request_room(&gdm->port, len) == len) { + tty_insert_flip_string(&gdm->port, data, len); + tty_flip_buffer_push(&gdm->port); + } else { + return TO_HOST_BUFFER_REQUEST_FAIL; + } + } + + if (complete == RECV_PACKET_PROCESS_COMPLETE) + gdm->tty_dev->recv_func(gdm->tty_dev->priv_dev, + gdm_tty_recv_complete); + + return 0; +} + +static void gdm_tty_send_complete(void *arg) +{ + struct gdm *gdm = arg; + + if (!gdm_tty_ready(gdm)) + return; + + tty_port_tty_wakeup(&gdm->port); +} + +static ssize_t gdm_tty_write(struct tty_struct *tty, const u8 *buf, size_t len) +{ + struct gdm *gdm = tty->driver_data; + size_t remain = len; + size_t sent_len = 0; + + if (!gdm_tty_ready(gdm)) + return -ENODEV; + + while (remain) { + size_t sending_len = min_t(size_t, MUX_TX_MAX_SIZE, remain); + gdm->tty_dev->send_func(gdm->tty_dev->priv_dev, + (void *)(buf + sent_len), + sending_len, + gdm->index, + gdm_tty_send_complete, + gdm); + sent_len += sending_len; + remain -= sending_len; + } + + return len; +} + +static unsigned int gdm_tty_write_room(struct tty_struct *tty) +{ + struct gdm *gdm = tty->driver_data; + + if (!gdm_tty_ready(gdm)) + return 0; + + return WRITE_SIZE; +} + +int register_lte_tty_device(struct tty_dev *tty_dev, struct device *device) +{ + struct gdm *gdm; + int i; + int j; + + for (i = 0; i < TTY_MAX_COUNT; i++) { + gdm = kmalloc(sizeof(*gdm), GFP_KERNEL); + if (!gdm) + return -ENOMEM; + + mutex_lock(&gdm_table_lock); + for (j = 0; j < GDM_TTY_MINOR; j++) { + if (!gdm_table[i][j]) + break; + } + + if (j == GDM_TTY_MINOR) { + kfree(gdm); + mutex_unlock(&gdm_table_lock); + return -EINVAL; + } + + gdm_table[i][j] = gdm; + mutex_unlock(&gdm_table_lock); + + tty_dev->gdm[i] = gdm; + tty_port_init(&gdm->port); + + gdm->port.ops = &gdm_port_ops; + gdm->index = i; + gdm->minor = j; + gdm->tty_dev = tty_dev; + + tty_port_register_device(&gdm->port, gdm_driver[i], + gdm->minor, device); + } + + for (i = 0; i < MAX_ISSUE_NUM; i++) + gdm->tty_dev->recv_func(gdm->tty_dev->priv_dev, + gdm_tty_recv_complete); + + return 0; +} + +void unregister_lte_tty_device(struct tty_dev *tty_dev) +{ + struct gdm *gdm; + struct tty_struct *tty; + int i; + + for (i = 0; i < TTY_MAX_COUNT; i++) { + gdm = tty_dev->gdm[i]; + if (!gdm) + continue; + + mutex_lock(&gdm_table_lock); + gdm_table[gdm->index][gdm->minor] = NULL; + mutex_unlock(&gdm_table_lock); + + tty = tty_port_tty_get(&gdm->port); + if (tty) { + tty_vhangup(tty); + tty_kref_put(tty); + } + + tty_unregister_device(gdm_driver[i], gdm->minor); + tty_port_put(&gdm->port); + } +} + +static const struct tty_operations gdm_tty_ops = { + .install = gdm_tty_install, + .open = gdm_tty_open, + .close = gdm_tty_close, + .cleanup = gdm_tty_cleanup, + .hangup = gdm_tty_hangup, + .write = gdm_tty_write, + .write_room = gdm_tty_write_room, +}; + +int register_lte_tty_driver(void) +{ + struct tty_driver *tty_driver; + int i; + int ret; + + for (i = 0; i < TTY_MAX_COUNT; i++) { + tty_driver = tty_alloc_driver(GDM_TTY_MINOR, + TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV); + if (IS_ERR(tty_driver)) + return PTR_ERR(tty_driver); + + 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->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); + if (ret) { + tty_driver_kref_put(tty_driver); + return ret; + } + + gdm_driver[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 = gdm_driver[i]; + if (tty_driver) { + tty_unregister_driver(tty_driver); + tty_driver_kref_put(tty_driver); + } + } +} + diff --git a/drivers/staging/gdm724x/gdm_tty.h b/drivers/staging/gdm724x/gdm_tty.h new file mode 100644 index 0000000000..afec97ced4 --- /dev/null +++ b/drivers/staging/gdm724x/gdm_tty.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#ifndef _GDM_TTY_H_ +#define _GDM_TTY_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_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 gdm { + struct tty_dev *tty_dev; + struct tty_port port; + unsigned int index; + unsigned int minor; +}; + +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, + struct tty_dev *tty_dev, + int complete)); + int (*send_control)(void *priv_dev, + int request, + int value, + void *data, + int len); + struct gdm *gdm[2]; +}; + +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 0000000000..54bdb64f52 --- /dev/null +++ b/drivers/staging/gdm724x/gdm_usb.c @@ -0,0 +1,1012 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/usb.h> +#include <linux/sched.h> +#include <linux/kthread.h> +#include <linux/usb/cdc.h> +#include <linux/wait.h> +#include <linux/if_ether.h> +#include <linux/pm_runtime.h> + +#include "gdm_usb.h" +#include "gdm_lte.h" +#include "hci.h" +#include "hci_packet.h" +#include "gdm_endian.h" + +#define USB_DEVICE_CDC_DATA(vid, pid) \ + .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ + USB_DEVICE_ID_MATCH_INT_CLASS | \ + USB_DEVICE_ID_MATCH_INT_SUBCLASS,\ + .idVendor = vid,\ + .idProduct = pid,\ + .bInterfaceClass = USB_CLASS_COMM,\ + .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET + +#define USB_DEVICE_MASS_DATA(vid, pid) \ + .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ + USB_DEVICE_ID_MATCH_INT_INFO,\ + .idVendor = vid,\ + .idProduct = pid,\ + .bInterfaceSubClass = USB_SC_SCSI, \ + .bInterfaceClass = USB_CLASS_MASS_STORAGE,\ + .bInterfaceProtocol = USB_PR_BULK + +static const struct usb_device_id id_table[] = { + { USB_DEVICE_CDC_DATA(VID_GCT, PID_GDM7240) }, /* GCT GDM7240 */ + { USB_DEVICE_CDC_DATA(VID_GCT, PID_GDM7243) }, /* GCT GDM7243 */ + { } +}; + +MODULE_DEVICE_TABLE(usb, id_table); + +static void do_tx(struct work_struct *work); +static void do_rx(struct work_struct *work); + +static int gdm_usb_recv(void *priv_dev, + int (*cb)(void *cb_data, + void *data, int len, int context), + void *cb_data, + int context); + +static int request_mac_address(struct lte_udev *udev) +{ + struct hci_packet *hci; + struct usb_device *usbdev = udev->usbdev; + int actual; + int ret = -1; + + hci = kmalloc(struct_size(hci, data, 1), GFP_KERNEL); + if (!hci) + return -ENOMEM; + + 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), hci, 5, + &actual, 1000); + + udev->request_mac_addr = 1; + kfree(hci); + + return ret; +} + +static struct usb_tx *alloc_tx_struct(int len) +{ + struct usb_tx *t = NULL; + int ret = 0; + + t = kzalloc(sizeof(*t), GFP_ATOMIC); + if (!t) { + ret = -ENOMEM; + goto out; + } + + t->urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!(len % 512)) + len++; + + t->buf = kmalloc(len, GFP_ATOMIC); + if (!t->urb || !t->buf) { + ret = -ENOMEM; + goto out; + } + +out: + if (ret < 0) { + if (t) { + usb_free_urb(t->urb); + kfree(t->buf); + kfree(t); + } + return NULL; + } + + return t; +} + +static struct usb_tx_sdu *alloc_tx_sdu_struct(void) +{ + struct usb_tx_sdu *t_sdu; + + t_sdu = kzalloc(sizeof(*t_sdu), GFP_KERNEL); + if (!t_sdu) + return NULL; + + t_sdu->buf = kmalloc(SDU_BUF_SIZE, GFP_KERNEL); + if (!t_sdu->buf) { + kfree(t_sdu); + return NULL; + } + + return t_sdu; +} + +static void free_tx_struct(struct usb_tx *t) +{ + if (t) { + usb_free_urb(t->urb); + kfree(t->buf); + kfree(t); + } +} + +static void free_tx_sdu_struct(struct usb_tx_sdu *t_sdu) +{ + if (t_sdu) { + kfree(t_sdu->buf); + kfree(t_sdu); + } +} + +static struct usb_tx_sdu *get_tx_sdu_struct(struct tx_cxt *tx, int *no_spc) +{ + struct usb_tx_sdu *t_sdu; + + if (list_empty(&tx->free_list)) + return NULL; + + t_sdu = list_entry(tx->free_list.next, struct usb_tx_sdu, list); + list_del(&t_sdu->list); + + tx->avail_count--; + + *no_spc = list_empty(&tx->free_list) ? 1 : 0; + + return t_sdu; +} + +static void put_tx_struct(struct tx_cxt *tx, struct usb_tx_sdu *t_sdu) +{ + list_add_tail(&t_sdu->list, &tx->free_list); + tx->avail_count++; +} + +static struct usb_rx *alloc_rx_struct(void) +{ + struct usb_rx *r = NULL; + int ret = 0; + + r = kmalloc(sizeof(*r), GFP_KERNEL); + if (!r) { + ret = -ENOMEM; + goto out; + } + + r->urb = usb_alloc_urb(0, GFP_KERNEL); + r->buf = kmalloc(RX_BUF_SIZE, GFP_KERNEL); + if (!r->urb || !r->buf) { + ret = -ENOMEM; + goto out; + } +out: + + if (ret < 0) { + if (r) { + usb_free_urb(r->urb); + kfree(r->buf); + kfree(r); + } + return NULL; + } + + return r; +} + +static void free_rx_struct(struct usb_rx *r) +{ + if (r) { + usb_free_urb(r->urb); + kfree(r->buf); + kfree(r); + } +} + +static struct usb_rx *get_rx_struct(struct rx_cxt *rx, int *no_spc) +{ + struct usb_rx *r; + unsigned long flags; + + spin_lock_irqsave(&rx->rx_lock, flags); + + if (list_empty(&rx->free_list)) { + spin_unlock_irqrestore(&rx->rx_lock, flags); + return NULL; + } + + r = list_entry(rx->free_list.next, struct usb_rx, free_list); + list_del(&r->free_list); + + rx->avail_count--; + + *no_spc = list_empty(&rx->free_list) ? 1 : 0; + + spin_unlock_irqrestore(&rx->rx_lock, flags); + + return r; +} + +static void put_rx_struct(struct rx_cxt *rx, struct usb_rx *r) +{ + unsigned long flags; + + spin_lock_irqsave(&rx->rx_lock, flags); + + list_add_tail(&r->free_list, &rx->free_list); + rx->avail_count++; + + spin_unlock_irqrestore(&rx->rx_lock, flags); +} + +static void release_usb(struct lte_udev *udev) +{ + struct rx_cxt *rx = &udev->rx; + struct tx_cxt *tx = &udev->tx; + struct usb_tx *t, *t_next; + struct usb_rx *r, *r_next; + struct usb_tx_sdu *t_sdu, *t_sdu_next; + unsigned long flags; + + spin_lock_irqsave(&tx->lock, flags); + list_for_each_entry_safe(t_sdu, t_sdu_next, &tx->sdu_list, list) { + list_del(&t_sdu->list); + free_tx_sdu_struct(t_sdu); + } + + list_for_each_entry_safe(t, t_next, &tx->hci_list, list) { + list_del(&t->list); + free_tx_struct(t); + } + + list_for_each_entry_safe(t_sdu, t_sdu_next, &tx->free_list, list) { + list_del(&t_sdu->list); + free_tx_sdu_struct(t_sdu); + } + spin_unlock_irqrestore(&tx->lock, flags); + + spin_lock_irqsave(&rx->submit_lock, flags); + list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, + rx_submit_list) { + spin_unlock_irqrestore(&rx->submit_lock, flags); + usb_kill_urb(r->urb); + spin_lock_irqsave(&rx->submit_lock, flags); + } + spin_unlock_irqrestore(&rx->submit_lock, flags); + + spin_lock_irqsave(&rx->rx_lock, flags); + list_for_each_entry_safe(r, r_next, &rx->free_list, free_list) { + list_del(&r->free_list); + free_rx_struct(r); + } + spin_unlock_irqrestore(&rx->rx_lock, flags); + + spin_lock_irqsave(&rx->to_host_lock, flags); + list_for_each_entry_safe(r, r_next, &rx->to_host_list, to_host_list) { + if (r->index == (void *)udev) { + list_del(&r->to_host_list); + free_rx_struct(r); + } + } + spin_unlock_irqrestore(&rx->to_host_lock, flags); +} + +static int init_usb(struct lte_udev *udev) +{ + int ret = 0; + int i; + struct tx_cxt *tx = &udev->tx; + struct rx_cxt *rx = &udev->rx; + struct usb_tx_sdu *t_sdu = NULL; + struct usb_rx *r = NULL; + + udev->send_complete = 1; + udev->tx_stop = 0; + udev->request_mac_addr = 0; + udev->usb_state = PM_NORMAL; + + INIT_LIST_HEAD(&tx->sdu_list); + INIT_LIST_HEAD(&tx->hci_list); + INIT_LIST_HEAD(&tx->free_list); + INIT_LIST_HEAD(&rx->rx_submit_list); + INIT_LIST_HEAD(&rx->free_list); + INIT_LIST_HEAD(&rx->to_host_list); + spin_lock_init(&tx->lock); + spin_lock_init(&rx->rx_lock); + spin_lock_init(&rx->submit_lock); + spin_lock_init(&rx->to_host_lock); + + tx->avail_count = 0; + rx->avail_count = 0; + + udev->rx_cb = NULL; + + for (i = 0; i < MAX_NUM_SDU_BUF; i++) { + t_sdu = alloc_tx_sdu_struct(); + if (!t_sdu) { + ret = -ENOMEM; + goto fail; + } + + list_add(&t_sdu->list, &tx->free_list); + tx->avail_count++; + } + + for (i = 0; i < MAX_RX_SUBMIT_COUNT * 2; i++) { + r = alloc_rx_struct(); + if (!r) { + ret = -ENOMEM; + goto fail; + } + + list_add(&r->free_list, &rx->free_list); + rx->avail_count++; + } + INIT_DELAYED_WORK(&udev->work_tx, do_tx); + INIT_DELAYED_WORK(&udev->work_rx, do_rx); + return 0; +fail: + release_usb(udev); + return ret; +} + +static int set_mac_address(u8 *data, void *arg) +{ + struct phy_dev *phy_dev = arg; + struct lte_udev *udev = phy_dev->priv_dev; + struct tlv *tlv = (struct tlv *)data; + u8 mac_address[ETH_ALEN] = {0, }; + + if (tlv->type == MAC_ADDRESS && udev->request_mac_addr) { + memcpy(mac_address, tlv->data, tlv->len); + + if (register_lte_device(phy_dev, + &udev->intf->dev, mac_address) < 0) + pr_err("register lte device failed\n"); + + udev->request_mac_addr = 0; + + return 1; + } + + return 0; +} + +static void do_rx(struct work_struct *work) +{ + struct lte_udev *udev = + container_of(work, struct lte_udev, work_rx.work); + struct rx_cxt *rx = &udev->rx; + struct usb_rx *r; + struct hci_packet *hci; + struct phy_dev *phy_dev; + u16 cmd_evt; + int ret; + unsigned long flags; + + while (1) { + spin_lock_irqsave(&rx->to_host_lock, flags); + if (list_empty(&rx->to_host_list)) { + spin_unlock_irqrestore(&rx->to_host_lock, flags); + break; + } + r = list_entry(rx->to_host_list.next, + struct usb_rx, to_host_list); + list_del(&r->to_host_list); + spin_unlock_irqrestore(&rx->to_host_lock, flags); + + phy_dev = r->cb_data; + udev = phy_dev->priv_dev; + hci = (struct hci_packet *)r->buf; + cmd_evt = gdm_dev16_to_cpu(udev->gdm_ed, hci->cmd_evt); + + switch (cmd_evt) { + case LTE_GET_INFORMATION_RESULT: + if (set_mac_address(hci->data, r->cb_data) == 0) { + r->callback(r->cb_data, + r->buf, + r->urb->actual_length, + KERNEL_THREAD); + } + break; + + default: + if (r->callback) { + ret = r->callback(r->cb_data, + r->buf, + r->urb->actual_length, + KERNEL_THREAD); + + if (ret == -EAGAIN) + pr_err("failed to send received data\n"); + } + break; + } + + put_rx_struct(rx, r); + + gdm_usb_recv(udev, + r->callback, + r->cb_data, + USB_COMPLETE); + } +} + +static void remove_rx_submit_list(struct usb_rx *r, struct rx_cxt *rx) +{ + unsigned long flags; + struct usb_rx *r_remove, *r_remove_next; + + spin_lock_irqsave(&rx->submit_lock, flags); + list_for_each_entry_safe(r_remove, r_remove_next, + &rx->rx_submit_list, rx_submit_list) { + if (r == r_remove) { + list_del(&r->rx_submit_list); + break; + } + } + spin_unlock_irqrestore(&rx->submit_lock, flags); +} + +static void gdm_usb_rcv_complete(struct urb *urb) +{ + struct usb_rx *r = urb->context; + struct rx_cxt *rx = r->rx; + unsigned long flags; + struct lte_udev *udev = container_of(r->rx, struct lte_udev, rx); + struct usb_device *usbdev = udev->usbdev; + + remove_rx_submit_list(r, rx); + + if (!urb->status && r->callback) { + spin_lock_irqsave(&rx->to_host_lock, flags); + list_add_tail(&r->to_host_list, &rx->to_host_list); + schedule_work(&udev->work_rx.work); + spin_unlock_irqrestore(&rx->to_host_lock, flags); + } else { + if (urb->status && udev->usb_state == PM_NORMAL) + dev_err(&urb->dev->dev, "%s: urb status error %d\n", + __func__, urb->status); + + put_rx_struct(rx, r); + } + + usb_mark_last_busy(usbdev); +} + +static int gdm_usb_recv(void *priv_dev, + int (*cb)(void *cb_data, + void *data, int len, int context), + void *cb_data, + int context) +{ + struct lte_udev *udev = priv_dev; + struct usb_device *usbdev = udev->usbdev; + struct rx_cxt *rx = &udev->rx; + struct usb_rx *r; + int no_spc; + int ret; + unsigned long flags; + + if (!udev->usbdev) { + pr_err("invalid device\n"); + return -ENODEV; + } + + r = get_rx_struct(rx, &no_spc); + if (!r) { + pr_err("Out of Memory\n"); + return -ENOMEM; + } + + udev->rx_cb = cb; + r->callback = cb; + r->cb_data = cb_data; + r->index = (void *)udev; + r->rx = rx; + + usb_fill_bulk_urb(r->urb, + usbdev, + usb_rcvbulkpipe(usbdev, 0x83), + r->buf, + RX_BUF_SIZE, + gdm_usb_rcv_complete, + r); + + spin_lock_irqsave(&rx->submit_lock, flags); + list_add_tail(&r->rx_submit_list, &rx->rx_submit_list); + spin_unlock_irqrestore(&rx->submit_lock, flags); + + if (context == KERNEL_THREAD) + ret = usb_submit_urb(r->urb, GFP_KERNEL); + else + ret = usb_submit_urb(r->urb, GFP_ATOMIC); + + if (ret) { + spin_lock_irqsave(&rx->submit_lock, flags); + list_del(&r->rx_submit_list); + spin_unlock_irqrestore(&rx->submit_lock, flags); + + pr_err("usb_submit_urb failed (%p)\n", r); + put_rx_struct(rx, r); + } + + return ret; +} + +static void gdm_usb_send_complete(struct urb *urb) +{ + struct usb_tx *t = urb->context; + struct tx_cxt *tx = t->tx; + struct lte_udev *udev = container_of(tx, struct lte_udev, tx); + unsigned long flags; + + if (urb->status == -ECONNRESET) { + dev_info(&urb->dev->dev, "CONNRESET\n"); + return; + } + + if (t->callback) + t->callback(t->cb_data); + + free_tx_struct(t); + + spin_lock_irqsave(&tx->lock, flags); + udev->send_complete = 1; + schedule_work(&udev->work_tx.work); + spin_unlock_irqrestore(&tx->lock, flags); +} + +static int send_tx_packet(struct usb_device *usbdev, struct usb_tx *t, u32 len) +{ + int ret = 0; + + if (!(len % 512)) + len++; + + usb_fill_bulk_urb(t->urb, + usbdev, + usb_sndbulkpipe(usbdev, 2), + t->buf, + len, + gdm_usb_send_complete, + t); + + ret = usb_submit_urb(t->urb, GFP_ATOMIC); + + if (ret) + dev_err(&usbdev->dev, "usb_submit_urb failed: %d\n", + ret); + + usb_mark_last_busy(usbdev); + + return ret; +} + +static u32 packet_aggregation(struct lte_udev *udev, u8 *send_buf) +{ + struct tx_cxt *tx = &udev->tx; + struct usb_tx_sdu *t_sdu = NULL; + struct multi_sdu *multi_sdu = (struct multi_sdu *)send_buf; + u16 send_len = 0; + u16 num_packet = 0; + unsigned long flags; + + multi_sdu->cmd_evt = gdm_cpu_to_dev16(udev->gdm_ed, LTE_TX_MULTI_SDU); + + while (num_packet < MAX_PACKET_IN_MULTI_SDU) { + spin_lock_irqsave(&tx->lock, flags); + if (list_empty(&tx->sdu_list)) { + spin_unlock_irqrestore(&tx->lock, flags); + break; + } + + t_sdu = list_entry(tx->sdu_list.next, struct usb_tx_sdu, list); + if (send_len + t_sdu->len > MAX_SDU_SIZE) { + spin_unlock_irqrestore(&tx->lock, flags); + break; + } + + list_del(&t_sdu->list); + spin_unlock_irqrestore(&tx->lock, flags); + + memcpy(multi_sdu->data + send_len, t_sdu->buf, t_sdu->len); + + send_len += (t_sdu->len + 3) & 0xfffc; + num_packet++; + + if (tx->avail_count > 10) + t_sdu->callback(t_sdu->cb_data); + + spin_lock_irqsave(&tx->lock, flags); + put_tx_struct(tx, t_sdu); + spin_unlock_irqrestore(&tx->lock, flags); + } + + multi_sdu->len = gdm_cpu_to_dev16(udev->gdm_ed, send_len); + multi_sdu->num_packet = gdm_cpu_to_dev16(udev->gdm_ed, num_packet); + + return send_len + offsetof(struct multi_sdu, data); +} + +static void do_tx(struct work_struct *work) +{ + struct lte_udev *udev = + container_of(work, struct lte_udev, work_tx.work); + struct usb_device *usbdev = udev->usbdev; + struct tx_cxt *tx = &udev->tx; + struct usb_tx *t = NULL; + int is_send = 0; + u32 len = 0; + unsigned long flags; + + if (!usb_autopm_get_interface(udev->intf)) + usb_autopm_put_interface(udev->intf); + + if (udev->usb_state == PM_SUSPEND) + return; + + spin_lock_irqsave(&tx->lock, flags); + if (!udev->send_complete) { + spin_unlock_irqrestore(&tx->lock, flags); + return; + } + udev->send_complete = 0; + + if (!list_empty(&tx->hci_list)) { + t = list_entry(tx->hci_list.next, struct usb_tx, list); + list_del(&t->list); + len = t->len; + t->is_sdu = 0; + is_send = 1; + } else if (!list_empty(&tx->sdu_list)) { + if (udev->tx_stop) { + udev->send_complete = 1; + spin_unlock_irqrestore(&tx->lock, flags); + return; + } + + t = alloc_tx_struct(TX_BUF_SIZE); + if (!t) { + spin_unlock_irqrestore(&tx->lock, flags); + return; + } + t->callback = NULL; + t->tx = tx; + t->is_sdu = 1; + is_send = 1; + } + + if (!is_send) { + udev->send_complete = 1; + spin_unlock_irqrestore(&tx->lock, flags); + return; + } + spin_unlock_irqrestore(&tx->lock, flags); + + if (t->is_sdu) + len = packet_aggregation(udev, t->buf); + + if (send_tx_packet(usbdev, t, len)) { + pr_err("send_tx_packet failed\n"); + t->callback = NULL; + gdm_usb_send_complete(t->urb); + } +} + +#define SDU_PARAM_LEN 12 +static int gdm_usb_sdu_send(void *priv_dev, void *data, int len, + unsigned int dft_eps_ID, unsigned int eps_ID, + void (*cb)(void *data), void *cb_data, + int dev_idx, int nic_type) +{ + struct lte_udev *udev = priv_dev; + struct tx_cxt *tx = &udev->tx; + struct usb_tx_sdu *t_sdu; + struct sdu *sdu = NULL; + unsigned long flags; + int no_spc = 0; + u16 send_len; + + if (!udev->usbdev) { + pr_err("sdu send - invalid device\n"); + return TX_NO_DEV; + } + + spin_lock_irqsave(&tx->lock, flags); + t_sdu = get_tx_sdu_struct(tx, &no_spc); + spin_unlock_irqrestore(&tx->lock, flags); + + if (!t_sdu) { + pr_err("sdu send - free list empty\n"); + return TX_NO_SPC; + } + + sdu = (struct sdu *)t_sdu->buf; + sdu->cmd_evt = gdm_cpu_to_dev16(udev->gdm_ed, LTE_TX_SDU); + if (nic_type == NIC_TYPE_ARP) { + send_len = len + SDU_PARAM_LEN; + memcpy(sdu->data, data, len); + } else { + send_len = len - ETH_HLEN; + send_len += SDU_PARAM_LEN; + memcpy(sdu->data, data + ETH_HLEN, len - ETH_HLEN); + } + + sdu->len = gdm_cpu_to_dev16(udev->gdm_ed, send_len); + sdu->dft_eps_ID = gdm_cpu_to_dev32(udev->gdm_ed, dft_eps_ID); + sdu->bearer_ID = gdm_cpu_to_dev32(udev->gdm_ed, eps_ID); + sdu->nic_type = gdm_cpu_to_dev32(udev->gdm_ed, nic_type); + + t_sdu->len = send_len + HCI_HEADER_SIZE; + t_sdu->callback = cb; + t_sdu->cb_data = cb_data; + + spin_lock_irqsave(&tx->lock, flags); + list_add_tail(&t_sdu->list, &tx->sdu_list); + schedule_work(&udev->work_tx.work); + spin_unlock_irqrestore(&tx->lock, flags); + + if (no_spc) + return TX_NO_BUFFER; + + return 0; +} + +static int gdm_usb_hci_send(void *priv_dev, void *data, int len, + void (*cb)(void *data), void *cb_data) +{ + struct lte_udev *udev = priv_dev; + struct tx_cxt *tx = &udev->tx; + struct usb_tx *t; + unsigned long flags; + + if (!udev->usbdev) { + pr_err("hci send - invalid device\n"); + return -ENODEV; + } + + t = alloc_tx_struct(len); + if (!t) { + pr_err("hci_send - out of memory\n"); + return -ENOMEM; + } + + memcpy(t->buf, data, len); + t->callback = cb; + t->cb_data = cb_data; + t->len = len; + t->tx = tx; + t->is_sdu = 0; + + spin_lock_irqsave(&tx->lock, flags); + list_add_tail(&t->list, &tx->hci_list); + schedule_work(&udev->work_tx.work); + spin_unlock_irqrestore(&tx->lock, flags); + + return 0; +} + +static u8 gdm_usb_get_endian(void *priv_dev) +{ + struct lte_udev *udev = priv_dev; + + return udev->gdm_ed; +} + +static int gdm_usb_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + int ret = 0; + struct phy_dev *phy_dev = NULL; + struct lte_udev *udev = NULL; + u16 idVendor, idProduct; + int bInterfaceNumber; + struct usb_device *usbdev = interface_to_usbdev(intf); + + bInterfaceNumber = intf->cur_altsetting->desc.bInterfaceNumber; + idVendor = __le16_to_cpu(usbdev->descriptor.idVendor); + idProduct = __le16_to_cpu(usbdev->descriptor.idProduct); + + pr_info("net vid = 0x%04x pid = 0x%04x\n", idVendor, idProduct); + + if (bInterfaceNumber > NETWORK_INTERFACE) { + pr_info("not a network device\n"); + return -ENODEV; + } + + phy_dev = kzalloc(sizeof(*phy_dev), GFP_KERNEL); + if (!phy_dev) + return -ENOMEM; + + udev = kzalloc(sizeof(*udev), GFP_KERNEL); + if (!udev) { + ret = -ENOMEM; + goto err_udev; + } + + phy_dev->priv_dev = (void *)udev; + phy_dev->send_hci_func = gdm_usb_hci_send; + phy_dev->send_sdu_func = gdm_usb_sdu_send; + phy_dev->rcv_func = gdm_usb_recv; + phy_dev->get_endian = gdm_usb_get_endian; + + udev->usbdev = usbdev; + ret = init_usb(udev); + if (ret < 0) { + dev_err(intf->usb_dev, "init_usb func failed\n"); + goto err_init_usb; + } + udev->intf = intf; + + intf->needs_remote_wakeup = 1; + usb_enable_autosuspend(usbdev); + pm_runtime_set_autosuspend_delay(&usbdev->dev, AUTO_SUSPEND_TIMER); + + /* List up hosts with big endians, otherwise, + * defaults to little endian + */ + if (idProduct == PID_GDM7243) + udev->gdm_ed = ENDIANNESS_BIG; + else + udev->gdm_ed = ENDIANNESS_LITTLE; + + ret = request_mac_address(udev); + if (ret < 0) { + dev_err(intf->usb_dev, "request Mac address failed\n"); + goto err_mac_address; + } + + start_rx_proc(phy_dev); + usb_get_dev(usbdev); + usb_set_intfdata(intf, phy_dev); + + return 0; + +err_mac_address: + release_usb(udev); +err_init_usb: + kfree(udev); +err_udev: + kfree(phy_dev); + + return ret; +} + +static void gdm_usb_disconnect(struct usb_interface *intf) +{ + struct phy_dev *phy_dev; + struct lte_udev *udev; + struct usb_device *usbdev; + + usbdev = interface_to_usbdev(intf); + phy_dev = usb_get_intfdata(intf); + + udev = phy_dev->priv_dev; + unregister_lte_device(phy_dev); + + release_usb(udev); + + kfree(udev); + udev = NULL; + + kfree(phy_dev); + phy_dev = NULL; + + usb_put_dev(usbdev); +} + +static int gdm_usb_suspend(struct usb_interface *intf, pm_message_t pm_msg) +{ + struct phy_dev *phy_dev; + struct lte_udev *udev; + struct rx_cxt *rx; + struct usb_rx *r; + struct usb_rx *r_next; + unsigned long flags; + + phy_dev = usb_get_intfdata(intf); + udev = phy_dev->priv_dev; + rx = &udev->rx; + if (udev->usb_state != PM_NORMAL) { + dev_err(intf->usb_dev, "usb suspend - invalid state\n"); + return -1; + } + + udev->usb_state = PM_SUSPEND; + + spin_lock_irqsave(&rx->submit_lock, flags); + list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, + rx_submit_list) { + spin_unlock_irqrestore(&rx->submit_lock, flags); + usb_kill_urb(r->urb); + spin_lock_irqsave(&rx->submit_lock, flags); + } + spin_unlock_irqrestore(&rx->submit_lock, flags); + + cancel_work_sync(&udev->work_tx.work); + cancel_work_sync(&udev->work_rx.work); + + return 0; +} + +static int gdm_usb_resume(struct usb_interface *intf) +{ + struct phy_dev *phy_dev; + struct lte_udev *udev; + struct tx_cxt *tx; + struct rx_cxt *rx; + unsigned long flags; + int issue_count; + int i; + + phy_dev = usb_get_intfdata(intf); + udev = phy_dev->priv_dev; + rx = &udev->rx; + + if (udev->usb_state != PM_SUSPEND) { + dev_err(intf->usb_dev, "usb resume - invalid state\n"); + return -1; + } + udev->usb_state = PM_NORMAL; + + spin_lock_irqsave(&rx->rx_lock, flags); + issue_count = rx->avail_count - MAX_RX_SUBMIT_COUNT; + spin_unlock_irqrestore(&rx->rx_lock, flags); + + if (issue_count >= 0) { + for (i = 0; i < issue_count; i++) + gdm_usb_recv(phy_dev->priv_dev, + udev->rx_cb, + phy_dev, + USB_COMPLETE); + } + + tx = &udev->tx; + spin_lock_irqsave(&tx->lock, flags); + schedule_work(&udev->work_tx.work); + spin_unlock_irqrestore(&tx->lock, flags); + + return 0; +} + +static struct usb_driver gdm_usb_lte_driver = { + .name = "gdm_lte", + .probe = gdm_usb_probe, + .disconnect = gdm_usb_disconnect, + .id_table = id_table, + .supports_autosuspend = 1, + .suspend = gdm_usb_suspend, + .resume = gdm_usb_resume, + .reset_resume = gdm_usb_resume, +}; + +static int __init gdm_usb_lte_init(void) +{ + if (gdm_lte_event_init() < 0) { + pr_err("error creating event\n"); + return -1; + } + + return usb_register(&gdm_usb_lte_driver); +} + +static void __exit gdm_usb_lte_exit(void) +{ + gdm_lte_event_exit(); + + usb_deregister(&gdm_usb_lte_driver); +} + +module_init(gdm_usb_lte_init); +module_exit(gdm_usb_lte_exit); + +MODULE_VERSION(DRIVER_VERSION); +MODULE_DESCRIPTION("GCT LTE USB Device Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/staging/gdm724x/gdm_usb.h b/drivers/staging/gdm724x/gdm_usb.h new file mode 100644 index 0000000000..db689b091c --- /dev/null +++ b/drivers/staging/gdm724x/gdm_usb.h @@ -0,0 +1,99 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#ifndef _GDM_USB_H_ +#define _GDM_USB_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 tx_cxt tx; + struct rx_cxt rx; + struct delayed_work work_tx; + struct delayed_work work_rx; + u8 gdm_ed; + 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 0000000000..b30945daf3 --- /dev/null +++ b/drivers/staging/gdm724x/hci.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#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 0000000000..3bb01e94f3 --- /dev/null +++ b/drivers/staging/gdm724x/hci_packet.h @@ -0,0 +1,82 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#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 { + __dev16 cmd_evt; + __dev16 len; + u8 data[]; +} __packed; + +struct tlv { + u8 type; + u8 len; + u8 *data[]; +} __packed; + +struct sdu_header { + __dev16 cmd_evt; + __dev16 len; + __dev32 dft_eps_id; + __dev32 bearer_ID; + __dev32 nic_type; +} __packed; + +struct sdu { + __dev16 cmd_evt; + __dev16 len; + __dev32 dft_eps_ID; + __dev32 bearer_ID; + __dev32 nic_type; + u8 data[]; +} __packed; + +struct multi_sdu { + __dev16 cmd_evt; + __dev16 len; + __dev16 num_packet; + __dev16 reserved; + u8 data[]; +} __packed; + +struct hci_pdn_table_ind { + __dev16 cmd_evt; + __dev16 len; + u8 activate; + __dev32 dft_eps_id; + __dev32 nic_type; + u8 pdn_type; + u8 ipv4_addr[4]; + u8 ipv6_intf_id[8]; +} __packed; + +struct hci_connect_ind { + __dev16 cmd_evt; + __dev16 len; + __dev32 connect; +} __packed; + +#endif /* _HCI_PACKET_H_ */ diff --git a/drivers/staging/gdm724x/netlink_k.c b/drivers/staging/gdm724x/netlink_k.c new file mode 100644 index 0000000000..8f39cc5617 --- /dev/null +++ b/drivers/staging/gdm724x/netlink_k.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/export.h> +#include <linux/mutex.h> +#include <linux/etherdevice.h> +#include <linux/netlink.h> +#include <asm/byteorder.h> +#include <net/sock.h> + +#include "netlink_k.h" + +static DEFINE_MUTEX(netlink_mutex); + +#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) { + pr_err("nl cb - unregistered\n"); + return; + } + + if (skb->len < NLMSG_HDRLEN) { + pr_err("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) { + pr_err("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 { + pr_err("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; + struct netlink_kernel_cfg cfg = { + .input = netlink_rcv, + }; + + sock = netlink_kernel_create(&init_net, unit, &cfg); + + if (sock) + rcv_cb = cb; + + return sock; +} + +int netlink_send(struct sock *sock, int group, u16 type, void *msg, int len, + struct net_device *dev) +{ + 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); + NETLINK_CB(skb).portid = 0; + NETLINK_CB(skb).dst_group = 0; + + ret = netlink_broadcast(sock, skb, 0, group + 1, GFP_ATOMIC); + if (!ret) + return len; + + if (ret != -ESRCH) + netdev_err(dev, "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 0000000000..d42eea9bea --- /dev/null +++ b/drivers/staging/gdm724x/netlink_k.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */ + +#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)); +int netlink_send(struct sock *sock, int group, u16 type, void *msg, int len, + struct net_device *dev); + +#endif /* _NETLINK_K_H_ */ |