diff options
Diffstat (limited to 'drivers/net/usb/hso.c')
| -rw-r--r-- | drivers/net/usb/hso.c | 3314 |
1 files changed, 3314 insertions, 0 deletions
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c new file mode 100644 index 0000000000..83b8452220 --- /dev/null +++ b/drivers/net/usb/hso.c @@ -0,0 +1,3314 @@ +// SPDX-License-Identifier: GPL-2.0-only +/****************************************************************************** + * + * Driver for Option High Speed Mobile Devices. + * + * Copyright (C) 2008 Option International + * Filip Aben <f.aben@option.com> + * Denis Joseph Barrow <d.barow@option.com> + * Jan Dumon <j.dumon@option.com> + * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) + * <ajb@spheresystems.co.uk> + * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> + * Copyright (C) 2008 Novell, Inc. + * + *****************************************************************************/ + +/****************************************************************************** + * + * Description of the device: + * + * Interface 0: Contains the IP network interface on the bulk end points. + * The multiplexed serial ports are using the interrupt and + * control endpoints. + * Interrupt contains a bitmap telling which multiplexed + * serialport needs servicing. + * + * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the + * port is opened, as this have a huge impact on the network port + * throughput. + * + * Interface 2: Standard modem interface - circuit switched interface, this + * can be used to make a standard ppp connection however it + * should not be used in conjunction with the IP network interface + * enabled for USB performance reasons i.e. if using this set + * ideally disable_net=1. + * + *****************************************************************************/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/sched/signal.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/module.h> +#include <linux/ethtool.h> +#include <linux/usb.h> +#include <linux/tty.h> +#include <linux/tty_driver.h> +#include <linux/tty_flip.h> +#include <linux/kmod.h> +#include <linux/rfkill.h> +#include <linux/ip.h> +#include <linux/uaccess.h> +#include <linux/usb/cdc.h> +#include <net/arp.h> +#include <asm/byteorder.h> +#include <linux/serial_core.h> +#include <linux/serial.h> + + +#define MOD_AUTHOR "Option Wireless" +#define MOD_DESCRIPTION "USB High Speed Option driver" + +#define HSO_MAX_NET_DEVICES 10 +#define HSO__MAX_MTU 2048 +#define DEFAULT_MTU 1500 +#define DEFAULT_MRU 1500 + +#define CTRL_URB_RX_SIZE 1024 +#define CTRL_URB_TX_SIZE 64 + +#define BULK_URB_RX_SIZE 4096 +#define BULK_URB_TX_SIZE 8192 + +#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU +#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU +#define MUX_BULK_RX_BUF_COUNT 4 +#define USB_TYPE_OPTION_VENDOR 0x20 + +/* These definitions are used with the struct hso_net flags element */ +/* - use *_bit operations on it. (bit indices not values.) */ +#define HSO_NET_RUNNING 0 + +#define HSO_NET_TX_TIMEOUT (HZ*10) + +#define HSO_SERIAL_MAGIC 0x48534f31 + +/* Number of ttys to handle */ +#define HSO_SERIAL_TTY_MINORS 256 + +#define MAX_RX_URBS 2 + +/*****************************************************************************/ +/* Debugging functions */ +/*****************************************************************************/ +#define hso_dbg(lvl, fmt, ...) \ +do { \ + if ((lvl) & debug) \ + pr_info("[%d:%s] " fmt, \ + __LINE__, __func__, ##__VA_ARGS__); \ +} while (0) + +/*****************************************************************************/ +/* Enumerators */ +/*****************************************************************************/ +enum pkt_parse_state { + WAIT_IP, + WAIT_DATA, + WAIT_SYNC +}; + +/*****************************************************************************/ +/* Structs */ +/*****************************************************************************/ + +struct hso_shared_int { + struct usb_endpoint_descriptor *intr_endp; + void *shared_intr_buf; + struct urb *shared_intr_urb; + struct usb_device *usb; + int use_count; + int ref_count; + struct mutex shared_int_lock; +}; + +struct hso_net { + struct hso_device *parent; + struct net_device *net; + struct rfkill *rfkill; + char name[24]; + + struct usb_endpoint_descriptor *in_endp; + struct usb_endpoint_descriptor *out_endp; + + struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; + struct urb *mux_bulk_tx_urb; + void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; + void *mux_bulk_tx_buf; + + struct sk_buff *skb_rx_buf; + struct sk_buff *skb_tx_buf; + + enum pkt_parse_state rx_parse_state; + spinlock_t net_lock; + + unsigned short rx_buf_size; + unsigned short rx_buf_missing; + struct iphdr rx_ip_hdr; + + unsigned long flags; +}; + +enum rx_ctrl_state{ + RX_IDLE, + RX_SENT, + RX_PENDING +}; + +#define BM_REQUEST_TYPE (0xa1) +#define B_NOTIFICATION (0x20) +#define W_VALUE (0x0) +#define W_LENGTH (0x2) + +#define B_OVERRUN (0x1<<6) +#define B_PARITY (0x1<<5) +#define B_FRAMING (0x1<<4) +#define B_RING_SIGNAL (0x1<<3) +#define B_BREAK (0x1<<2) +#define B_TX_CARRIER (0x1<<1) +#define B_RX_CARRIER (0x1<<0) + +struct hso_serial_state_notification { + u8 bmRequestType; + u8 bNotification; + u16 wValue; + u16 wIndex; + u16 wLength; + u16 UART_state_bitmap; +} __packed; + +struct hso_tiocmget { + struct mutex mutex; + wait_queue_head_t waitq; + int intr_completed; + struct usb_endpoint_descriptor *endp; + struct urb *urb; + struct hso_serial_state_notification *serial_state_notification; + u16 prev_UART_state_bitmap; + struct uart_icount icount; +}; + + +struct hso_serial { + struct hso_device *parent; + int magic; + u8 minor; + + struct hso_shared_int *shared_int; + + /* rx/tx urb could be either a bulk urb or a control urb depending + on which serial port it is used on. */ + struct urb *rx_urb[MAX_RX_URBS]; + u8 num_rx_urbs; + u8 *rx_data[MAX_RX_URBS]; + u16 rx_data_length; /* should contain allocated length */ + + struct urb *tx_urb; + u8 *tx_data; + u8 *tx_buffer; + u16 tx_data_length; /* should contain allocated length */ + u16 tx_data_count; + u16 tx_buffer_count; + struct usb_ctrlrequest ctrl_req_tx; + struct usb_ctrlrequest ctrl_req_rx; + + struct usb_endpoint_descriptor *in_endp; + struct usb_endpoint_descriptor *out_endp; + + enum rx_ctrl_state rx_state; + u8 rts_state; + u8 dtr_state; + unsigned tx_urb_used:1; + + struct tty_port port; + /* from usb_serial_port */ + spinlock_t serial_lock; + + int (*write_data) (struct hso_serial *serial); + struct hso_tiocmget *tiocmget; + /* Hacks required to get flow control + * working on the serial receive buffers + * so as not to drop characters on the floor. + */ + int curr_rx_urb_idx; + u8 rx_urb_filled[MAX_RX_URBS]; + struct tasklet_struct unthrottle_tasklet; +}; + +struct hso_device { + union { + struct hso_serial *dev_serial; + struct hso_net *dev_net; + } port_data; + + u32 port_spec; + + u8 is_active; + u8 usb_gone; + struct work_struct async_get_intf; + struct work_struct async_put_intf; + + struct usb_device *usb; + struct usb_interface *interface; + + struct device *dev; + struct kref ref; + struct mutex mutex; +}; + +/* Type of interface */ +#define HSO_INTF_MASK 0xFF00 +#define HSO_INTF_MUX 0x0100 +#define HSO_INTF_BULK 0x0200 + +/* Type of port */ +#define HSO_PORT_MASK 0xFF +#define HSO_PORT_NO_PORT 0x0 +#define HSO_PORT_CONTROL 0x1 +#define HSO_PORT_APP 0x2 +#define HSO_PORT_GPS 0x3 +#define HSO_PORT_PCSC 0x4 +#define HSO_PORT_APP2 0x5 +#define HSO_PORT_GPS_CONTROL 0x6 +#define HSO_PORT_MSD 0x7 +#define HSO_PORT_VOICE 0x8 +#define HSO_PORT_DIAG2 0x9 +#define HSO_PORT_DIAG 0x10 +#define HSO_PORT_MODEM 0x11 +#define HSO_PORT_NETWORK 0x12 + +/* Additional device info */ +#define HSO_INFO_MASK 0xFF000000 +#define HSO_INFO_CRC_BUG 0x01000000 + +/*****************************************************************************/ +/* Prototypes */ +/*****************************************************************************/ +/* Serial driver functions */ +static int hso_serial_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear); +static void ctrl_callback(struct urb *urb); +static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); +static void hso_kick_transmit(struct hso_serial *serial); +/* Helper functions */ +static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, + struct usb_device *usb, gfp_t gfp); +static void handle_usb_error(int status, const char *function, + struct hso_device *hso_dev); +static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, + int type, int dir); +static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); +static void hso_free_interface(struct usb_interface *intf); +static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); +static int hso_stop_serial_device(struct hso_device *hso_dev); +static int hso_start_net_device(struct hso_device *hso_dev); +static void hso_free_shared_int(struct hso_shared_int *shared_int); +static int hso_stop_net_device(struct hso_device *hso_dev); +static void hso_serial_ref_free(struct kref *ref); +static void hso_std_serial_read_bulk_callback(struct urb *urb); +static int hso_mux_serial_read(struct hso_serial *serial); +static void async_get_intf(struct work_struct *data); +static void async_put_intf(struct work_struct *data); +static int hso_put_activity(struct hso_device *hso_dev); +static int hso_get_activity(struct hso_device *hso_dev); +static void tiocmget_intr_callback(struct urb *urb); +/*****************************************************************************/ +/* Helping functions */ +/*****************************************************************************/ + +/* #define DEBUG */ + +static inline struct hso_net *dev2net(struct hso_device *hso_dev) +{ + return hso_dev->port_data.dev_net; +} + +static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) +{ + return hso_dev->port_data.dev_serial; +} + +/* Debugging functions */ +#ifdef DEBUG +static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, + unsigned int len) +{ + static char name[255]; + + sprintf(name, "hso[%d:%s]", line_count, func_name); + print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); +} + +#define DUMP(buf_, len_) \ + dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) + +#define DUMP1(buf_, len_) \ + do { \ + if (0x01 & debug) \ + DUMP(buf_, len_); \ + } while (0) +#else +#define DUMP(buf_, len_) +#define DUMP1(buf_, len_) +#endif + +/* module parameters */ +static int debug; +static int tty_major; +static int disable_net; + +/* driver info */ +static const char driver_name[] = "hso"; +static const char tty_filename[] = "ttyHS"; +static const char *version = __FILE__ ": " MOD_AUTHOR; +/* the usb driver itself (registered in hso_init) */ +static struct usb_driver hso_driver; +/* serial structures */ +static struct tty_driver *tty_drv; +static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; +static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; +static DEFINE_SPINLOCK(serial_table_lock); + +static const s32 default_port_spec[] = { + HSO_INTF_MUX | HSO_PORT_NETWORK, + HSO_INTF_BULK | HSO_PORT_DIAG, + HSO_INTF_BULK | HSO_PORT_MODEM, + 0 +}; + +static const s32 icon321_port_spec[] = { + HSO_INTF_MUX | HSO_PORT_NETWORK, + HSO_INTF_BULK | HSO_PORT_DIAG2, + HSO_INTF_BULK | HSO_PORT_MODEM, + HSO_INTF_BULK | HSO_PORT_DIAG, + 0 +}; + +#define default_port_device(vendor, product) \ + USB_DEVICE(vendor, product), \ + .driver_info = (kernel_ulong_t)default_port_spec + +#define icon321_port_device(vendor, product) \ + USB_DEVICE(vendor, product), \ + .driver_info = (kernel_ulong_t)icon321_port_spec + +/* list of devices we support */ +static const struct usb_device_id hso_ids[] = { + {default_port_device(0x0af0, 0x6711)}, + {default_port_device(0x0af0, 0x6731)}, + {default_port_device(0x0af0, 0x6751)}, + {default_port_device(0x0af0, 0x6771)}, + {default_port_device(0x0af0, 0x6791)}, + {default_port_device(0x0af0, 0x6811)}, + {default_port_device(0x0af0, 0x6911)}, + {default_port_device(0x0af0, 0x6951)}, + {default_port_device(0x0af0, 0x6971)}, + {default_port_device(0x0af0, 0x7011)}, + {default_port_device(0x0af0, 0x7031)}, + {default_port_device(0x0af0, 0x7051)}, + {default_port_device(0x0af0, 0x7071)}, + {default_port_device(0x0af0, 0x7111)}, + {default_port_device(0x0af0, 0x7211)}, + {default_port_device(0x0af0, 0x7251)}, + {default_port_device(0x0af0, 0x7271)}, + {default_port_device(0x0af0, 0x7311)}, + {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ + {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ + {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ + {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ + {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ + {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ + {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ + {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ + {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ + {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ + {USB_DEVICE(0x0af0, 0x7701)}, + {USB_DEVICE(0x0af0, 0x7706)}, + {USB_DEVICE(0x0af0, 0x7801)}, + {USB_DEVICE(0x0af0, 0x7901)}, + {USB_DEVICE(0x0af0, 0x7A01)}, + {USB_DEVICE(0x0af0, 0x7A05)}, + {USB_DEVICE(0x0af0, 0x8200)}, + {USB_DEVICE(0x0af0, 0x8201)}, + {USB_DEVICE(0x0af0, 0x8300)}, + {USB_DEVICE(0x0af0, 0x8302)}, + {USB_DEVICE(0x0af0, 0x8304)}, + {USB_DEVICE(0x0af0, 0x8400)}, + {USB_DEVICE(0x0af0, 0x8600)}, + {USB_DEVICE(0x0af0, 0x8800)}, + {USB_DEVICE(0x0af0, 0x8900)}, + {USB_DEVICE(0x0af0, 0x9000)}, + {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ + {USB_DEVICE(0x0af0, 0xd035)}, + {USB_DEVICE(0x0af0, 0xd055)}, + {USB_DEVICE(0x0af0, 0xd155)}, + {USB_DEVICE(0x0af0, 0xd255)}, + {USB_DEVICE(0x0af0, 0xd057)}, + {USB_DEVICE(0x0af0, 0xd157)}, + {USB_DEVICE(0x0af0, 0xd257)}, + {USB_DEVICE(0x0af0, 0xd357)}, + {USB_DEVICE(0x0af0, 0xd058)}, + {USB_DEVICE(0x0af0, 0xc100)}, + {} +}; +MODULE_DEVICE_TABLE(usb, hso_ids); + +/* Sysfs attribute */ +static ssize_t hsotype_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hso_device *hso_dev = dev_get_drvdata(dev); + char *port_name; + + if (!hso_dev) + return 0; + + switch (hso_dev->port_spec & HSO_PORT_MASK) { + case HSO_PORT_CONTROL: + port_name = "Control"; + break; + case HSO_PORT_APP: + port_name = "Application"; + break; + case HSO_PORT_APP2: + port_name = "Application2"; + break; + case HSO_PORT_GPS: + port_name = "GPS"; + break; + case HSO_PORT_GPS_CONTROL: + port_name = "GPS Control"; + break; + case HSO_PORT_PCSC: + port_name = "PCSC"; + break; + case HSO_PORT_DIAG: + port_name = "Diagnostic"; + break; + case HSO_PORT_DIAG2: + port_name = "Diagnostic2"; + break; + case HSO_PORT_MODEM: + port_name = "Modem"; + break; + case HSO_PORT_NETWORK: + port_name = "Network"; + break; + default: + port_name = "Unknown"; + break; + } + + return sprintf(buf, "%s\n", port_name); +} +static DEVICE_ATTR_RO(hsotype); + +static struct attribute *hso_serial_dev_attrs[] = { + &dev_attr_hsotype.attr, + NULL +}; + +ATTRIBUTE_GROUPS(hso_serial_dev); + +static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) +{ + int idx; + + for (idx = 0; idx < serial->num_rx_urbs; idx++) + if (serial->rx_urb[idx] == urb) + return idx; + dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); + return -1; +} + +/* converts mux value to a port spec value */ +static u32 hso_mux_to_port(int mux) +{ + u32 result; + + switch (mux) { + case 0x1: + result = HSO_PORT_CONTROL; + break; + case 0x2: + result = HSO_PORT_APP; + break; + case 0x4: + result = HSO_PORT_PCSC; + break; + case 0x8: + result = HSO_PORT_GPS; + break; + case 0x10: + result = HSO_PORT_APP2; + break; + default: + result = HSO_PORT_NO_PORT; + } + return result; +} + +/* converts port spec value to a mux value */ +static u32 hso_port_to_mux(int port) +{ + u32 result; + + switch (port & HSO_PORT_MASK) { + case HSO_PORT_CONTROL: + result = 0x0; + break; + case HSO_PORT_APP: + result = 0x1; + break; + case HSO_PORT_PCSC: + result = 0x2; + break; + case HSO_PORT_GPS: + result = 0x3; + break; + case HSO_PORT_APP2: + result = 0x4; + break; + default: + result = 0x0; + } + return result; +} + +static struct hso_serial *get_serial_by_shared_int_and_type( + struct hso_shared_int *shared_int, + int mux) +{ + int i, port; + + port = hso_mux_to_port(mux); + + for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { + if (serial_table[i] && + (dev2ser(serial_table[i])->shared_int == shared_int) && + ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { + return dev2ser(serial_table[i]); + } + } + + return NULL; +} + +static struct hso_serial *get_serial_by_index(unsigned index) +{ + struct hso_serial *serial = NULL; + unsigned long flags; + + spin_lock_irqsave(&serial_table_lock, flags); + if (serial_table[index]) + serial = dev2ser(serial_table[index]); + spin_unlock_irqrestore(&serial_table_lock, flags); + + return serial; +} + +static int obtain_minor(struct hso_serial *serial) +{ + int index; + unsigned long flags; + + spin_lock_irqsave(&serial_table_lock, flags); + for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { + if (serial_table[index] == NULL) { + serial_table[index] = serial->parent; + serial->minor = index; + spin_unlock_irqrestore(&serial_table_lock, flags); + return 0; + } + } + spin_unlock_irqrestore(&serial_table_lock, flags); + + pr_err("%s: no free serial devices in table\n", __func__); + return -1; +} + +static void release_minor(struct hso_serial *serial) +{ + unsigned long flags; + + spin_lock_irqsave(&serial_table_lock, flags); + serial_table[serial->minor] = NULL; + spin_unlock_irqrestore(&serial_table_lock, flags); +} + +static void handle_usb_error(int status, const char *function, + struct hso_device *hso_dev) +{ + char *explanation; + + switch (status) { + case -ENODEV: + explanation = "no device"; + break; + case -ENOENT: + explanation = "endpoint not enabled"; + break; + case -EPIPE: + explanation = "endpoint stalled"; + break; + case -ENOSPC: + explanation = "not enough bandwidth"; + break; + case -ESHUTDOWN: + explanation = "device disabled"; + break; + case -EHOSTUNREACH: + explanation = "device suspended"; + break; + case -EINVAL: + case -EAGAIN: + case -EFBIG: + case -EMSGSIZE: + explanation = "internal error"; + break; + case -EILSEQ: + case -EPROTO: + case -ETIME: + case -ETIMEDOUT: + explanation = "protocol error"; + if (hso_dev) + usb_queue_reset_device(hso_dev->interface); + break; + default: + explanation = "unknown status"; + break; + } + + /* log a meaningful explanation of an USB status */ + hso_dbg(0x1, "%s: received USB status - %s (%d)\n", + function, explanation, status); +} + +/* Network interface functions */ + +/* called when net interface is brought up by ifconfig */ +static int hso_net_open(struct net_device *net) +{ + struct hso_net *odev = netdev_priv(net); + unsigned long flags = 0; + + if (!odev) { + dev_err(&net->dev, "No net device !\n"); + return -ENODEV; + } + + odev->skb_tx_buf = NULL; + + /* setup environment */ + spin_lock_irqsave(&odev->net_lock, flags); + odev->rx_parse_state = WAIT_IP; + odev->rx_buf_size = 0; + odev->rx_buf_missing = sizeof(struct iphdr); + spin_unlock_irqrestore(&odev->net_lock, flags); + + /* We are up and running. */ + set_bit(HSO_NET_RUNNING, &odev->flags); + hso_start_net_device(odev->parent); + + /* Tell the kernel we are ready to start receiving from it */ + netif_start_queue(net); + + return 0; +} + +/* called when interface is brought down by ifconfig */ +static int hso_net_close(struct net_device *net) +{ + struct hso_net *odev = netdev_priv(net); + + /* we don't need the queue anymore */ + netif_stop_queue(net); + /* no longer running */ + clear_bit(HSO_NET_RUNNING, &odev->flags); + + hso_stop_net_device(odev->parent); + + /* done */ + return 0; +} + +/* USB tells is xmit done, we should start the netqueue again */ +static void write_bulk_callback(struct urb *urb) +{ + struct hso_net *odev = urb->context; + int status = urb->status; + + /* Sanity check */ + if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { + dev_err(&urb->dev->dev, "%s: device not running\n", __func__); + return; + } + + /* Do we still have a valid kernel network device? */ + if (!netif_device_present(odev->net)) { + dev_err(&urb->dev->dev, "%s: net device not present\n", + __func__); + return; + } + + /* log status, but don't act on it, we don't need to resubmit anything + * anyhow */ + if (status) + handle_usb_error(status, __func__, odev->parent); + + hso_put_activity(odev->parent); + + /* Tell the network interface we are ready for another frame */ + netif_wake_queue(odev->net); +} + +/* called by kernel when we need to transmit a packet */ +static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, + struct net_device *net) +{ + struct hso_net *odev = netdev_priv(net); + int result; + + /* Tell the kernel, "No more frames 'til we are done with this one." */ + netif_stop_queue(net); + if (hso_get_activity(odev->parent) == -EAGAIN) { + odev->skb_tx_buf = skb; + return NETDEV_TX_OK; + } + + /* log if asked */ + DUMP1(skb->data, skb->len); + /* Copy it from kernel memory to OUR memory */ + memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); + hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE); + + /* Fill in the URB for shipping it out. */ + usb_fill_bulk_urb(odev->mux_bulk_tx_urb, + odev->parent->usb, + usb_sndbulkpipe(odev->parent->usb, + odev->out_endp-> + bEndpointAddress & 0x7F), + odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, + odev); + + /* Deal with the Zero Length packet problem, I hope */ + odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; + + /* Send the URB on its merry way. */ + result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); + if (result) { + dev_warn(&odev->parent->interface->dev, + "failed mux_bulk_tx_urb %d\n", result); + net->stats.tx_errors++; + netif_start_queue(net); + } else { + net->stats.tx_packets++; + net->stats.tx_bytes += skb->len; + } + dev_kfree_skb(skb); + /* we're done */ + return NETDEV_TX_OK; +} + +static const struct ethtool_ops ops = { + .get_link = ethtool_op_get_link +}; + +/* called when a packet did not ack after watchdogtimeout */ +static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue) +{ + struct hso_net *odev = netdev_priv(net); + + if (!odev) + return; + + /* Tell syslog we are hosed. */ + dev_warn(&net->dev, "Tx timed out.\n"); + + /* Tear the waiting frame off the list */ + if (odev->mux_bulk_tx_urb) + usb_unlink_urb(odev->mux_bulk_tx_urb); + + /* Update statistics */ + net->stats.tx_errors++; +} + +/* make a real packet from the received USB buffer */ +static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, + unsigned int count, unsigned char is_eop) +{ + unsigned short temp_bytes; + unsigned short buffer_offset = 0; + unsigned short frame_len; + + /* log if needed */ + hso_dbg(0x1, "Rx %d bytes\n", count); + DUMP(ip_pkt, min(128, (int)count)); + + while (count) { + switch (odev->rx_parse_state) { + case WAIT_IP: + /* waiting for IP header. */ + /* wanted bytes - size of ip header */ + temp_bytes = + (count < + odev->rx_buf_missing) ? count : odev-> + rx_buf_missing; + + memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + + odev->rx_buf_size, ip_pkt + buffer_offset, + temp_bytes); + + odev->rx_buf_size += temp_bytes; + buffer_offset += temp_bytes; + odev->rx_buf_missing -= temp_bytes; + count -= temp_bytes; + + if (!odev->rx_buf_missing) { + /* header is complete allocate an sk_buffer and + * continue to WAIT_DATA */ + frame_len = ntohs(odev->rx_ip_hdr.tot_len); + + if ((frame_len > DEFAULT_MRU) || + (frame_len < sizeof(struct iphdr))) { + dev_err(&odev->net->dev, + "Invalid frame (%d) length\n", + frame_len); + odev->rx_parse_state = WAIT_SYNC; + continue; + } + /* Allocate an sk_buff */ + odev->skb_rx_buf = netdev_alloc_skb(odev->net, + frame_len); + if (!odev->skb_rx_buf) { + /* We got no receive buffer. */ + hso_dbg(0x1, "could not allocate memory\n"); + odev->rx_parse_state = WAIT_SYNC; + continue; + } + + /* Copy what we got so far. make room for iphdr + * after tail. */ + skb_put_data(odev->skb_rx_buf, + (char *)&(odev->rx_ip_hdr), + sizeof(struct iphdr)); + + /* ETH_HLEN */ + odev->rx_buf_size = sizeof(struct iphdr); + + /* Filip actually use .tot_len */ + odev->rx_buf_missing = + frame_len - sizeof(struct iphdr); + odev->rx_parse_state = WAIT_DATA; + } + break; + + case WAIT_DATA: + temp_bytes = (count < odev->rx_buf_missing) + ? count : odev->rx_buf_missing; + + /* Copy the rest of the bytes that are left in the + * buffer into the waiting sk_buf. */ + /* Make room for temp_bytes after tail. */ + skb_put_data(odev->skb_rx_buf, + ip_pkt + buffer_offset, + temp_bytes); + + odev->rx_buf_missing -= temp_bytes; + count -= temp_bytes; + buffer_offset += temp_bytes; + odev->rx_buf_size += temp_bytes; + if (!odev->rx_buf_missing) { + /* Packet is complete. Inject into stack. */ + /* We have IP packet here */ + odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); + skb_reset_mac_header(odev->skb_rx_buf); + + /* Ship it off to the kernel */ + netif_rx(odev->skb_rx_buf); + /* No longer our buffer. */ + odev->skb_rx_buf = NULL; + + /* update out statistics */ + odev->net->stats.rx_packets++; + + odev->net->stats.rx_bytes += odev->rx_buf_size; + + odev->rx_buf_size = 0; + odev->rx_buf_missing = sizeof(struct iphdr); + odev->rx_parse_state = WAIT_IP; + } + break; + + case WAIT_SYNC: + hso_dbg(0x1, " W_S\n"); + count = 0; + break; + default: + hso_dbg(0x1, "\n"); + count--; + break; + } + } + + /* Recovery mechanism for WAIT_SYNC state. */ + if (is_eop) { + if (odev->rx_parse_state == WAIT_SYNC) { + odev->rx_parse_state = WAIT_IP; + odev->rx_buf_size = 0; + odev->rx_buf_missing = sizeof(struct iphdr); + } + } +} + +static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) +{ + static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; + u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); + + if (((rest == 5) || (rest == 6)) && + !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, + crc_check, 4)) { + urb->actual_length -= 4; + } +} + +/* Moving data from usb to kernel (in interrupt state) */ +static void read_bulk_callback(struct urb *urb) +{ + struct hso_net *odev = urb->context; + struct net_device *net; + int result; + unsigned long flags; + int status = urb->status; + + /* is al ok? (Filip: Who's Al ?) */ + if (status) { + handle_usb_error(status, __func__, odev->parent); + return; + } + + /* Sanity check */ + if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { + hso_dbg(0x1, "BULK IN callback but driver is not active!\n"); + return; + } + usb_mark_last_busy(urb->dev); + + net = odev->net; + + if (!netif_device_present(net)) { + /* Somebody killed our network interface... */ + return; + } + + if (odev->parent->port_spec & HSO_INFO_CRC_BUG) + fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); + + /* do we even have a packet? */ + if (urb->actual_length) { + /* Handle the IP stream, add header and push it onto network + * stack if the packet is complete. */ + spin_lock_irqsave(&odev->net_lock, flags); + packetizeRx(odev, urb->transfer_buffer, urb->actual_length, + (urb->transfer_buffer_length > + urb->actual_length) ? 1 : 0); + spin_unlock_irqrestore(&odev->net_lock, flags); + } + + /* We are done with this URB, resubmit it. Prep the USB to wait for + * another frame. Reuse same as received. */ + usb_fill_bulk_urb(urb, + odev->parent->usb, + usb_rcvbulkpipe(odev->parent->usb, + odev->in_endp-> + bEndpointAddress & 0x7F), + urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, + read_bulk_callback, odev); + + /* Give this to the USB subsystem so it can tell us when more data + * arrives. */ + result = usb_submit_urb(urb, GFP_ATOMIC); + if (result) + dev_warn(&odev->parent->interface->dev, + "%s failed submit mux_bulk_rx_urb %d\n", __func__, + result); +} + +/* Serial driver functions */ + +static void hso_init_termios(struct ktermios *termios) +{ + /* + * The default requirements for this device are: + */ + termios->c_iflag &= + ~(IGNBRK /* disable ignore break */ + | BRKINT /* disable break causes interrupt */ + | PARMRK /* disable mark parity errors */ + | ISTRIP /* disable clear high bit of input characters */ + | INLCR /* disable translate NL to CR */ + | IGNCR /* disable ignore CR */ + | ICRNL /* disable translate CR to NL */ + | IXON); /* disable enable XON/XOFF flow control */ + + /* disable postprocess output characters */ + termios->c_oflag &= ~OPOST; + + termios->c_lflag &= + ~(ECHO /* disable echo input characters */ + | ECHONL /* disable echo new line */ + | ICANON /* disable erase, kill, werase, and rprnt + special characters */ + | ISIG /* disable interrupt, quit, and suspend special + characters */ + | IEXTEN); /* disable non-POSIX special characters */ + + termios->c_cflag &= + ~(CSIZE /* no size */ + | PARENB /* disable parity bit */ + | CBAUD /* clear current baud rate */ + | CBAUDEX); /* clear current buad rate */ + + termios->c_cflag |= CS8; /* character size 8 bits */ + + /* baud rate 115200 */ + tty_termios_encode_baud_rate(termios, 115200, 115200); +} + +static void _hso_serial_set_termios(struct tty_struct *tty) +{ + struct hso_serial *serial = tty->driver_data; + + if (!serial) { + pr_err("%s: no tty structures", __func__); + return; + } + + hso_dbg(0x8, "port %d\n", serial->minor); + + /* + * Fix up unsupported bits + */ + tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ + + tty->termios.c_cflag &= + ~(CSIZE /* no size */ + | PARENB /* disable parity bit */ + | CBAUD /* clear current baud rate */ + | CBAUDEX); /* clear current buad rate */ + + tty->termios.c_cflag |= CS8; /* character size 8 bits */ + + /* baud rate 115200 */ + tty_encode_baud_rate(tty, 115200, 115200); +} + +static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) +{ + int result; + /* We are done with this URB, resubmit it. Prep the USB to wait for + * another frame */ + usb_fill_bulk_urb(urb, serial->parent->usb, + usb_rcvbulkpipe(serial->parent->usb, + serial->in_endp-> + bEndpointAddress & 0x7F), + urb->transfer_buffer, serial->rx_data_length, + hso_std_serial_read_bulk_callback, serial); + /* Give this to the USB subsystem so it can tell us when more data + * arrives. */ + result = usb_submit_urb(urb, GFP_ATOMIC); + if (result) { + dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", + __func__, result); + } +} + + + + +static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) +{ + int count; + struct urb *curr_urb; + + while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { + curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; + count = put_rxbuf_data(curr_urb, serial); + if (count == -1) + return; + if (count == 0) { + serial->curr_rx_urb_idx++; + if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) + serial->curr_rx_urb_idx = 0; + hso_resubmit_rx_bulk_urb(serial, curr_urb); + } + } +} + +static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) +{ + int count = 0; + struct urb *urb; + + urb = serial->rx_urb[0]; + if (serial->port.count > 0) { + count = put_rxbuf_data(urb, serial); + if (count == -1) + return; + } + /* Re issue a read as long as we receive data. */ + + if (count == 0 && ((urb->actual_length != 0) || + (serial->rx_state == RX_PENDING))) { + serial->rx_state = RX_SENT; + hso_mux_serial_read(serial); + } else + serial->rx_state = RX_IDLE; +} + + +/* read callback for Diag and CS port */ +static void hso_std_serial_read_bulk_callback(struct urb *urb) +{ + struct hso_serial *serial = urb->context; + int status = urb->status; + unsigned long flags; + + hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status); + + /* sanity check */ + if (!serial) { + hso_dbg(0x1, "serial == NULL\n"); + return; + } + if (status) { + handle_usb_error(status, __func__, serial->parent); + return; + } + + hso_dbg(0x1, "Actual length = %d\n", urb->actual_length); + DUMP1(urb->transfer_buffer, urb->actual_length); + + /* Anyone listening? */ + if (serial->port.count == 0) + return; + + if (serial->parent->port_spec & HSO_INFO_CRC_BUG) + fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); + /* Valid data, handle RX data */ + spin_lock_irqsave(&serial->serial_lock, flags); + serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; + put_rxbuf_data_and_resubmit_bulk_urb(serial); + spin_unlock_irqrestore(&serial->serial_lock, flags); +} + +/* + * This needs to be a tasklet otherwise we will + * end up recursively calling this function. + */ +static void hso_unthrottle_tasklet(struct tasklet_struct *t) +{ + struct hso_serial *serial = from_tasklet(serial, t, + unthrottle_tasklet); + unsigned long flags; + + spin_lock_irqsave(&serial->serial_lock, flags); + if ((serial->parent->port_spec & HSO_INTF_MUX)) + put_rxbuf_data_and_resubmit_ctrl_urb(serial); + else + put_rxbuf_data_and_resubmit_bulk_urb(serial); + spin_unlock_irqrestore(&serial->serial_lock, flags); +} + +static void hso_unthrottle(struct tty_struct *tty) +{ + struct hso_serial *serial = tty->driver_data; + + tasklet_hi_schedule(&serial->unthrottle_tasklet); +} + +/* open the requested serial port */ +static int hso_serial_open(struct tty_struct *tty, struct file *filp) +{ + struct hso_serial *serial = get_serial_by_index(tty->index); + int result; + + /* sanity check */ + if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { + WARN_ON(1); + tty->driver_data = NULL; + hso_dbg(0x1, "Failed to open port\n"); + return -ENODEV; + } + + mutex_lock(&serial->parent->mutex); + result = usb_autopm_get_interface(serial->parent->interface); + if (result < 0) + goto err_out; + + hso_dbg(0x1, "Opening %d\n", serial->minor); + + /* setup */ + tty->driver_data = serial; + tty_port_tty_set(&serial->port, tty); + + /* check for port already opened, if not set the termios */ + serial->port.count++; + if (serial->port.count == 1) { + serial->rx_state = RX_IDLE; + /* Force default termio settings */ + _hso_serial_set_termios(tty); + tasklet_setup(&serial->unthrottle_tasklet, + hso_unthrottle_tasklet); + result = hso_start_serial_device(serial->parent, GFP_KERNEL); + if (result) { + hso_stop_serial_device(serial->parent); + serial->port.count--; + } else { + kref_get(&serial->parent->ref); + } + } else { + hso_dbg(0x1, "Port was already open\n"); + } + + usb_autopm_put_interface(serial->parent->interface); + + /* done */ + if (result) + hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); +err_out: + mutex_unlock(&serial->parent->mutex); + return result; +} + +/* close the requested serial port */ +static void hso_serial_close(struct tty_struct *tty, struct file *filp) +{ + struct hso_serial *serial = tty->driver_data; + u8 usb_gone; + + hso_dbg(0x1, "Closing serial port\n"); + + /* Open failed, no close cleanup required */ + if (serial == NULL) + return; + + mutex_lock(&serial->parent->mutex); + usb_gone = serial->parent->usb_gone; + + if (!usb_gone) + usb_autopm_get_interface(serial->parent->interface); + + /* reset the rts and dtr */ + /* do the actual close */ + serial->port.count--; + + if (serial->port.count <= 0) { + serial->port.count = 0; + tty_port_tty_set(&serial->port, NULL); + if (!usb_gone) + hso_stop_serial_device(serial->parent); + tasklet_kill(&serial->unthrottle_tasklet); + } + + if (!usb_gone) + usb_autopm_put_interface(serial->parent->interface); + + mutex_unlock(&serial->parent->mutex); +} + +/* close the requested serial port */ +static ssize_t hso_serial_write(struct tty_struct *tty, const u8 *buf, + size_t count) +{ + struct hso_serial *serial = tty->driver_data; + unsigned long flags; + + /* sanity check */ + if (serial == NULL) { + pr_err("%s: serial is NULL\n", __func__); + return -ENODEV; + } + + spin_lock_irqsave(&serial->serial_lock, flags); + + count = min_t(size_t, serial->tx_data_length - serial->tx_buffer_count, + count); + memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, count); + serial->tx_buffer_count += count; + + spin_unlock_irqrestore(&serial->serial_lock, flags); + + hso_kick_transmit(serial); + /* done */ + return count; +} + +/* how much room is there for writing */ +static unsigned int hso_serial_write_room(struct tty_struct *tty) +{ + struct hso_serial *serial = tty->driver_data; + unsigned int room; + unsigned long flags; + + spin_lock_irqsave(&serial->serial_lock, flags); + room = serial->tx_data_length - serial->tx_buffer_count; + spin_unlock_irqrestore(&serial->serial_lock, flags); + + /* return free room */ + return room; +} + +static void hso_serial_cleanup(struct tty_struct *tty) +{ + struct hso_serial *serial = tty->driver_data; + + if (!serial) + return; + + kref_put(&serial->parent->ref, hso_serial_ref_free); +} + +/* setup the term */ +static void hso_serial_set_termios(struct tty_struct *tty, + const struct ktermios *old) +{ + struct hso_serial *serial = tty->driver_data; + unsigned long flags; + + if (old) + hso_dbg(0x16, "Termios called with: cflags new[%u] - old[%u]\n", + (unsigned int)tty->termios.c_cflag, + (unsigned int)old->c_cflag); + + /* the actual setup */ + spin_lock_irqsave(&serial->serial_lock, flags); + if (serial->port.count) + _hso_serial_set_termios(tty); + else + tty->termios = *old; + spin_unlock_irqrestore(&serial->serial_lock, flags); + + /* done */ +} + +/* how many characters in the buffer */ +static unsigned int hso_serial_chars_in_buffer(struct tty_struct *tty) +{ + struct hso_serial *serial = tty->driver_data; + unsigned long flags; + unsigned int chars; + + /* sanity check */ + if (serial == NULL) + return 0; + + spin_lock_irqsave(&serial->serial_lock, flags); + chars = serial->tx_buffer_count; + spin_unlock_irqrestore(&serial->serial_lock, flags); + + return chars; +} +static int tiocmget_submit_urb(struct hso_serial *serial, + struct hso_tiocmget *tiocmget, + struct usb_device *usb) +{ + int result; + + if (serial->parent->usb_gone) + return -ENODEV; + usb_fill_int_urb(tiocmget->urb, usb, + usb_rcvintpipe(usb, + tiocmget->endp-> + bEndpointAddress & 0x7F), + tiocmget->serial_state_notification, + sizeof(struct hso_serial_state_notification), + tiocmget_intr_callback, serial, + tiocmget->endp->bInterval); + result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); + if (result) { + dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, + result); + } + return result; + +} + +static void tiocmget_intr_callback(struct urb *urb) +{ + struct hso_serial *serial = urb->context; + struct hso_tiocmget *tiocmget; + int status = urb->status; + u16 UART_state_bitmap, prev_UART_state_bitmap; + struct uart_icount *icount; + struct hso_serial_state_notification *serial_state_notification; + struct usb_device *usb; + struct usb_interface *interface; + int if_num; + + /* Sanity checks */ + if (!serial) + return; + if (status) { + handle_usb_error(status, __func__, serial->parent); + return; + } + + /* tiocmget is only supported on HSO_PORT_MODEM */ + tiocmget = serial->tiocmget; + if (!tiocmget) + return; + BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); + + usb = serial->parent->usb; + interface = serial->parent->interface; + + if_num = interface->cur_altsetting->desc.bInterfaceNumber; + + /* wIndex should be the USB interface number of the port to which the + * notification applies, which should always be the Modem port. + */ + serial_state_notification = tiocmget->serial_state_notification; + if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || + serial_state_notification->bNotification != B_NOTIFICATION || + le16_to_cpu(serial_state_notification->wValue) != W_VALUE || + le16_to_cpu(serial_state_notification->wIndex) != if_num || + le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { + dev_warn(&usb->dev, + "hso received invalid serial state notification\n"); + DUMP(serial_state_notification, + sizeof(struct hso_serial_state_notification)); + } else { + unsigned long flags; + + UART_state_bitmap = le16_to_cpu(serial_state_notification-> + UART_state_bitmap); + prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; + icount = &tiocmget->icount; + spin_lock_irqsave(&serial->serial_lock, flags); + if ((UART_state_bitmap & B_OVERRUN) != + (prev_UART_state_bitmap & B_OVERRUN)) + icount->parity++; + if ((UART_state_bitmap & B_PARITY) != + (prev_UART_state_bitmap & B_PARITY)) + icount->parity++; + if ((UART_state_bitmap & B_FRAMING) != + (prev_UART_state_bitmap & B_FRAMING)) + icount->frame++; + if ((UART_state_bitmap & B_RING_SIGNAL) && + !(prev_UART_state_bitmap & B_RING_SIGNAL)) + icount->rng++; + if ((UART_state_bitmap & B_BREAK) != + (prev_UART_state_bitmap & B_BREAK)) + icount->brk++; + if ((UART_state_bitmap & B_TX_CARRIER) != + (prev_UART_state_bitmap & B_TX_CARRIER)) + icount->dsr++; + if ((UART_state_bitmap & B_RX_CARRIER) != + (prev_UART_state_bitmap & B_RX_CARRIER)) + icount->dcd++; + tiocmget->prev_UART_state_bitmap = UART_state_bitmap; + spin_unlock_irqrestore(&serial->serial_lock, flags); + tiocmget->intr_completed = 1; + wake_up_interruptible(&tiocmget->waitq); + } + memset(serial_state_notification, 0, + sizeof(struct hso_serial_state_notification)); + tiocmget_submit_urb(serial, + tiocmget, + serial->parent->usb); +} + +/* + * next few functions largely stolen from drivers/serial/serial_core.c + */ +/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change + * - mask passed in arg for lines of interest + * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) + * Caller should use TIOCGICOUNT to see which one it was + */ +static int +hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) +{ + DECLARE_WAITQUEUE(wait, current); + struct uart_icount cprev, cnow; + struct hso_tiocmget *tiocmget; + int ret; + + tiocmget = serial->tiocmget; + if (!tiocmget) + return -ENOENT; + /* + * note the counters on entry + */ + spin_lock_irq(&serial->serial_lock); + memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); + spin_unlock_irq(&serial->serial_lock); + add_wait_queue(&tiocmget->waitq, &wait); + for (;;) { + spin_lock_irq(&serial->serial_lock); + memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); + spin_unlock_irq(&serial->serial_lock); + set_current_state(TASK_INTERRUPTIBLE); + if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || + ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || + ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { + ret = 0; + break; + } + schedule(); + /* see if a signal did it */ + if (signal_pending(current)) { + ret = -ERESTARTSYS; + break; + } + cprev = cnow; + } + __set_current_state(TASK_RUNNING); + remove_wait_queue(&tiocmget->waitq, &wait); + + return ret; +} + +/* + * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) + * Return: write counters to the user passed counter struct + * NB: both 1->0 and 0->1 transitions are counted except for + * RI where only 0->1 is counted. + */ +static int hso_get_count(struct tty_struct *tty, + struct serial_icounter_struct *icount) +{ + struct uart_icount cnow; + struct hso_serial *serial = tty->driver_data; + struct hso_tiocmget *tiocmget = serial->tiocmget; + + memset(icount, 0, sizeof(struct serial_icounter_struct)); + + if (!tiocmget) + return -ENOENT; + spin_lock_irq(&serial->serial_lock); + memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); + spin_unlock_irq(&serial->serial_lock); + + icount->cts = cnow.cts; + icount->dsr = cnow.dsr; + icount->rng = cnow.rng; + icount->dcd = cnow.dcd; + icount->rx = cnow.rx; + icount->tx = cnow.tx; + icount->frame = cnow.frame; + icount->overrun = cnow.overrun; + icount->parity = cnow.parity; + icount->brk = cnow.brk; + icount->buf_overrun = cnow.buf_overrun; + + return 0; +} + + +static int hso_serial_tiocmget(struct tty_struct *tty) +{ + int retval; + struct hso_serial *serial = tty->driver_data; + struct hso_tiocmget *tiocmget; + u16 UART_state_bitmap; + + /* sanity check */ + if (!serial) { + hso_dbg(0x1, "no tty structures\n"); + return -EINVAL; + } + spin_lock_irq(&serial->serial_lock); + retval = ((serial->rts_state) ? TIOCM_RTS : 0) | + ((serial->dtr_state) ? TIOCM_DTR : 0); + tiocmget = serial->tiocmget; + if (tiocmget) { + + UART_state_bitmap = le16_to_cpu( + tiocmget->prev_UART_state_bitmap); + if (UART_state_bitmap & B_RING_SIGNAL) + retval |= TIOCM_RNG; + if (UART_state_bitmap & B_RX_CARRIER) + retval |= TIOCM_CD; + if (UART_state_bitmap & B_TX_CARRIER) + retval |= TIOCM_DSR; + } + spin_unlock_irq(&serial->serial_lock); + return retval; +} + +static int hso_serial_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) +{ + int val = 0; + unsigned long flags; + int if_num; + struct hso_serial *serial = tty->driver_data; + struct usb_interface *interface; + + /* sanity check */ + if (!serial) { + hso_dbg(0x1, "no tty structures\n"); + return -EINVAL; + } + + if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) + return -EINVAL; + + interface = serial->parent->interface; + if_num = interface->cur_altsetting->desc.bInterfaceNumber; + + spin_lock_irqsave(&serial->serial_lock, flags); + if (set & TIOCM_RTS) + serial->rts_state = 1; + if (set & TIOCM_DTR) + serial->dtr_state = 1; + + if (clear & TIOCM_RTS) + serial->rts_state = 0; + if (clear & TIOCM_DTR) + serial->dtr_state = 0; + + if (serial->dtr_state) + val |= 0x01; + if (serial->rts_state) + val |= 0x02; + + spin_unlock_irqrestore(&serial->serial_lock, flags); + + return usb_control_msg(serial->parent->usb, + usb_sndctrlpipe(serial->parent->usb, 0), 0x22, + 0x21, val, if_num, NULL, 0, + USB_CTRL_SET_TIMEOUT); +} + +static int hso_serial_ioctl(struct tty_struct *tty, + unsigned int cmd, unsigned long arg) +{ + struct hso_serial *serial = tty->driver_data; + int ret = 0; + hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg); + + if (!serial) + return -ENODEV; + switch (cmd) { + case TIOCMIWAIT: + ret = hso_wait_modem_status(serial, arg); + break; + default: + ret = -ENOIOCTLCMD; + break; + } + return ret; +} + + +/* starts a transmit */ +static void hso_kick_transmit(struct hso_serial *serial) +{ + unsigned long flags; + int res; + + spin_lock_irqsave(&serial->serial_lock, flags); + if (!serial->tx_buffer_count) + goto out; + + if (serial->tx_urb_used) + goto out; + + /* Wakeup USB interface if necessary */ + if (hso_get_activity(serial->parent) == -EAGAIN) + goto out; + + /* Switch pointers around to avoid memcpy */ + swap(serial->tx_buffer, serial->tx_data); + serial->tx_data_count = serial->tx_buffer_count; + serial->tx_buffer_count = 0; + + /* If serial->tx_data is set, it means we switched buffers */ + if (serial->tx_data && serial->write_data) { + res = serial->write_data(serial); + if (res >= 0) + serial->tx_urb_used = 1; + } +out: + spin_unlock_irqrestore(&serial->serial_lock, flags); +} + +/* make a request (for reading and writing data to muxed serial port) */ +static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, + struct urb *ctrl_urb, + struct usb_ctrlrequest *ctrl_req, + u8 *ctrl_urb_data, u32 size) +{ + int result; + int pipe; + + /* Sanity check */ + if (!serial || !ctrl_urb || !ctrl_req) { + pr_err("%s: Wrong arguments\n", __func__); + return -EINVAL; + } + + /* initialize */ + ctrl_req->wValue = 0; + ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); + ctrl_req->wLength = cpu_to_le16(size); + + if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { + /* Reading command */ + ctrl_req->bRequestType = USB_DIR_IN | + USB_TYPE_OPTION_VENDOR | + USB_RECIP_INTERFACE; + ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; + pipe = usb_rcvctrlpipe(serial->parent->usb, 0); + } else { + /* Writing command */ + ctrl_req->bRequestType = USB_DIR_OUT | + USB_TYPE_OPTION_VENDOR | + USB_RECIP_INTERFACE; + ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; + pipe = usb_sndctrlpipe(serial->parent->usb, 0); + } + /* syslog */ + hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n", + type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", + ctrl_req->bRequestType, ctrl_req->wLength, port); + + /* Load ctrl urb */ + ctrl_urb->transfer_flags = 0; + usb_fill_control_urb(ctrl_urb, + serial->parent->usb, + pipe, + (u8 *) ctrl_req, + ctrl_urb_data, size, ctrl_callback, serial); + /* Send it on merry way */ + result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); + if (result) { + dev_err(&ctrl_urb->dev->dev, + "%s failed submit ctrl_urb %d type %d\n", __func__, + result, type); + return result; + } + + /* done */ + return size; +} + +/* called by intr_callback when read occurs */ +static int hso_mux_serial_read(struct hso_serial *serial) +{ + if (!serial) + return -EINVAL; + + /* clean data */ + memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); + /* make the request */ + + if (serial->num_rx_urbs != 1) { + dev_err(&serial->parent->interface->dev, + "ERROR: mux'd reads with multiple buffers " + "not possible\n"); + return 0; + } + return mux_device_request(serial, + USB_CDC_GET_ENCAPSULATED_RESPONSE, + serial->parent->port_spec & HSO_PORT_MASK, + serial->rx_urb[0], + &serial->ctrl_req_rx, + serial->rx_data[0], serial->rx_data_length); +} + +/* used for muxed serial port callback (muxed serial read) */ +static void intr_callback(struct urb *urb) +{ + struct hso_shared_int *shared_int = urb->context; + struct hso_serial *serial; + unsigned char *port_req; + int status = urb->status; + unsigned long flags; + int i; + + usb_mark_last_busy(urb->dev); + + /* sanity check */ + if (!shared_int) + return; + + /* status check */ + if (status) { + handle_usb_error(status, __func__, NULL); + return; + } + hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status); + + /* what request? */ + port_req = urb->transfer_buffer; + hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req); + /* loop over all muxed ports to find the one sending this */ + for (i = 0; i < 8; i++) { + /* max 8 channels on MUX */ + if (*port_req & (1 << i)) { + serial = get_serial_by_shared_int_and_type(shared_int, + (1 << i)); + if (serial != NULL) { + hso_dbg(0x1, "Pending read interrupt on port %d\n", + i); + spin_lock_irqsave(&serial->serial_lock, flags); + if (serial->rx_state == RX_IDLE && + serial->port.count > 0) { + /* Setup and send a ctrl req read on + * port i */ + if (!serial->rx_urb_filled[0]) { + serial->rx_state = RX_SENT; + hso_mux_serial_read(serial); + } else + serial->rx_state = RX_PENDING; + } else { + hso_dbg(0x1, "Already a read pending on port %d or port not open\n", + i); + } + spin_unlock_irqrestore(&serial->serial_lock, + flags); + } + } + } + /* Resubmit interrupt urb */ + hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); +} + +/* called for writing to muxed serial port */ +static int hso_mux_serial_write_data(struct hso_serial *serial) +{ + if (NULL == serial) + return -EINVAL; + + return mux_device_request(serial, + USB_CDC_SEND_ENCAPSULATED_COMMAND, + serial->parent->port_spec & HSO_PORT_MASK, + serial->tx_urb, + &serial->ctrl_req_tx, + serial->tx_data, serial->tx_data_count); +} + +/* write callback for Diag and CS port */ +static void hso_std_serial_write_bulk_callback(struct urb *urb) +{ + struct hso_serial *serial = urb->context; + int status = urb->status; + unsigned long flags; + + /* sanity check */ + if (!serial) { + hso_dbg(0x1, "serial == NULL\n"); + return; + } + + spin_lock_irqsave(&serial->serial_lock, flags); + serial->tx_urb_used = 0; + spin_unlock_irqrestore(&serial->serial_lock, flags); + if (status) { + handle_usb_error(status, __func__, serial->parent); + return; + } + hso_put_activity(serial->parent); + tty_port_tty_wakeup(&serial->port); + hso_kick_transmit(serial); + + hso_dbg(0x1, "\n"); +} + +/* called for writing diag or CS serial port */ +static int hso_std_serial_write_data(struct hso_serial *serial) +{ + int count = serial->tx_data_count; + int result; + + usb_fill_bulk_urb(serial->tx_urb, + serial->parent->usb, + usb_sndbulkpipe(serial->parent->usb, + serial->out_endp-> + bEndpointAddress & 0x7F), + serial->tx_data, serial->tx_data_count, + hso_std_serial_write_bulk_callback, serial); + + result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); + if (result) { + dev_warn(&serial->parent->usb->dev, + "Failed to submit urb - res %d\n", result); + return result; + } + + return count; +} + +/* callback after read or write on muxed serial port */ +static void ctrl_callback(struct urb *urb) +{ + struct hso_serial *serial = urb->context; + struct usb_ctrlrequest *req; + int status = urb->status; + unsigned long flags; + + /* sanity check */ + if (!serial) + return; + + spin_lock_irqsave(&serial->serial_lock, flags); + serial->tx_urb_used = 0; + spin_unlock_irqrestore(&serial->serial_lock, flags); + if (status) { + handle_usb_error(status, __func__, serial->parent); + return; + } + + /* what request? */ + req = (struct usb_ctrlrequest *)(urb->setup_packet); + hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status); + hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length); + DUMP1(urb->transfer_buffer, urb->actual_length); + + if (req->bRequestType == + (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { + /* response to a read command */ + serial->rx_urb_filled[0] = 1; + spin_lock_irqsave(&serial->serial_lock, flags); + put_rxbuf_data_and_resubmit_ctrl_urb(serial); + spin_unlock_irqrestore(&serial->serial_lock, flags); + } else { + hso_put_activity(serial->parent); + tty_port_tty_wakeup(&serial->port); + /* response to a write command */ + hso_kick_transmit(serial); + } +} + +/* handle RX data for serial port */ +static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) +{ + struct tty_struct *tty; + int count; + + /* Sanity check */ + if (urb == NULL || serial == NULL) { + hso_dbg(0x1, "serial = NULL\n"); + return -2; + } + + tty = tty_port_tty_get(&serial->port); + + if (tty && tty_throttled(tty)) { + tty_kref_put(tty); + return -1; + } + + /* Push data to tty */ + hso_dbg(0x1, "data to push to tty\n"); + count = tty_buffer_request_room(&serial->port, urb->actual_length); + if (count >= urb->actual_length) { + tty_insert_flip_string(&serial->port, urb->transfer_buffer, + urb->actual_length); + tty_flip_buffer_push(&serial->port); + } else { + dev_warn(&serial->parent->usb->dev, + "dropping data, %d bytes lost\n", urb->actual_length); + } + + tty_kref_put(tty); + + serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; + + return 0; +} + + +/* Base driver functions */ + +static void hso_log_port(struct hso_device *hso_dev) +{ + char *port_type; + char port_dev[20]; + + switch (hso_dev->port_spec & HSO_PORT_MASK) { + case HSO_PORT_CONTROL: + port_type = "Control"; + break; + case HSO_PORT_APP: + port_type = "Application"; + break; + case HSO_PORT_GPS: + port_type = "GPS"; + break; + case HSO_PORT_GPS_CONTROL: + port_type = "GPS control"; + break; + case HSO_PORT_APP2: + port_type = "Application2"; + break; + case HSO_PORT_PCSC: + port_type = "PCSC"; + break; + case HSO_PORT_DIAG: + port_type = "Diagnostic"; + break; + case HSO_PORT_DIAG2: + port_type = "Diagnostic2"; + break; + case HSO_PORT_MODEM: + port_type = "Modem"; + break; + case HSO_PORT_NETWORK: + port_type = "Network"; + break; + default: + port_type = "Unknown"; + break; + } + if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { + sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); + } else + sprintf(port_dev, "/dev/%s%d", tty_filename, + dev2ser(hso_dev)->minor); + + dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", + port_type, port_dev); +} + +static int hso_start_net_device(struct hso_device *hso_dev) +{ + int i, result = 0; + struct hso_net *hso_net = dev2net(hso_dev); + + if (!hso_net) + return -ENODEV; + + /* send URBs for all read buffers */ + for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { + + /* Prep a receive URB */ + usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], + hso_dev->usb, + usb_rcvbulkpipe(hso_dev->usb, + hso_net->in_endp-> + bEndpointAddress & 0x7F), + hso_net->mux_bulk_rx_buf_pool[i], + MUX_BULK_RX_BUF_SIZE, read_bulk_callback, + hso_net); + + /* Put it out there so the device can send us stuff */ + result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], + GFP_NOIO); + if (result) + dev_warn(&hso_dev->usb->dev, + "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, + i, result); + } + + return result; +} + +static int hso_stop_net_device(struct hso_device *hso_dev) +{ + int i; + struct hso_net *hso_net = dev2net(hso_dev); + + if (!hso_net) + return -ENODEV; + + for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { + if (hso_net->mux_bulk_rx_urb_pool[i]) + usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); + + } + if (hso_net->mux_bulk_tx_urb) + usb_kill_urb(hso_net->mux_bulk_tx_urb); + + return 0; +} + +static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) +{ + int i, result = 0; + struct hso_serial *serial = dev2ser(hso_dev); + + if (!serial) + return -ENODEV; + + /* If it is not the MUX port fill in and submit a bulk urb (already + * allocated in hso_serial_start) */ + if (!(serial->parent->port_spec & HSO_INTF_MUX)) { + for (i = 0; i < serial->num_rx_urbs; i++) { + usb_fill_bulk_urb(serial->rx_urb[i], + serial->parent->usb, + usb_rcvbulkpipe(serial->parent->usb, + serial->in_endp-> + bEndpointAddress & + 0x7F), + serial->rx_data[i], + serial->rx_data_length, + hso_std_serial_read_bulk_callback, + serial); + result = usb_submit_urb(serial->rx_urb[i], flags); + if (result) { + dev_warn(&serial->parent->usb->dev, + "Failed to submit urb - res %d\n", + result); + break; + } + } + } else { + mutex_lock(&serial->shared_int->shared_int_lock); + if (!serial->shared_int->use_count) { + result = + hso_mux_submit_intr_urb(serial->shared_int, + hso_dev->usb, flags); + } + serial->shared_int->use_count++; + mutex_unlock(&serial->shared_int->shared_int_lock); + } + if (serial->tiocmget) + tiocmget_submit_urb(serial, + serial->tiocmget, + serial->parent->usb); + return result; +} + +static int hso_stop_serial_device(struct hso_device *hso_dev) +{ + int i; + struct hso_serial *serial = dev2ser(hso_dev); + struct hso_tiocmget *tiocmget; + + if (!serial) + return -ENODEV; + + for (i = 0; i < serial->num_rx_urbs; i++) { + if (serial->rx_urb[i]) { + usb_kill_urb(serial->rx_urb[i]); + serial->rx_urb_filled[i] = 0; + } + } + serial->curr_rx_urb_idx = 0; + + if (serial->tx_urb) + usb_kill_urb(serial->tx_urb); + + if (serial->shared_int) { + mutex_lock(&serial->shared_int->shared_int_lock); + if (serial->shared_int->use_count && + (--serial->shared_int->use_count == 0)) { + struct urb *urb; + + urb = serial->shared_int->shared_intr_urb; + if (urb) + usb_kill_urb(urb); + } + mutex_unlock(&serial->shared_int->shared_int_lock); + } + tiocmget = serial->tiocmget; + if (tiocmget) { + wake_up_interruptible(&tiocmget->waitq); + usb_kill_urb(tiocmget->urb); + } + + return 0; +} + +static void hso_serial_tty_unregister(struct hso_serial *serial) +{ + tty_unregister_device(tty_drv, serial->minor); + release_minor(serial); +} + +static void hso_serial_common_free(struct hso_serial *serial) +{ + int i; + + for (i = 0; i < serial->num_rx_urbs; i++) { + /* unlink and free RX URB */ + usb_free_urb(serial->rx_urb[i]); + /* free the RX buffer */ + kfree(serial->rx_data[i]); + } + + /* unlink and free TX URB */ + usb_free_urb(serial->tx_urb); + kfree(serial->tx_buffer); + kfree(serial->tx_data); + tty_port_destroy(&serial->port); +} + +static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, + int rx_size, int tx_size) +{ + int i; + + tty_port_init(&serial->port); + + if (obtain_minor(serial)) + goto exit2; + + /* register our minor number */ + serial->parent->dev = tty_port_register_device_attr(&serial->port, + tty_drv, serial->minor, &serial->parent->interface->dev, + serial->parent, hso_serial_dev_groups); + if (IS_ERR(serial->parent->dev)) { + release_minor(serial); + goto exit2; + } + + serial->magic = HSO_SERIAL_MAGIC; + spin_lock_init(&serial->serial_lock); + serial->num_rx_urbs = num_urbs; + + /* RX, allocate urb and initialize */ + + /* prepare our RX buffer */ + serial->rx_data_length = rx_size; + for (i = 0; i < serial->num_rx_urbs; i++) { + serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); + if (!serial->rx_urb[i]) + goto exit; + serial->rx_urb[i]->transfer_buffer = NULL; + serial->rx_urb[i]->transfer_buffer_length = 0; + serial->rx_data[i] = kzalloc(serial->rx_data_length, + GFP_KERNEL); + if (!serial->rx_data[i]) + goto exit; + } + + /* TX, allocate urb and initialize */ + serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!serial->tx_urb) + goto exit; + serial->tx_urb->transfer_buffer = NULL; + serial->tx_urb->transfer_buffer_length = 0; + /* prepare our TX buffer */ + serial->tx_data_count = 0; + serial->tx_buffer_count = 0; + serial->tx_data_length = tx_size; + serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); + if (!serial->tx_data) + goto exit; + + serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); + if (!serial->tx_buffer) + goto exit; + + return 0; +exit: + hso_serial_tty_unregister(serial); +exit2: + hso_serial_common_free(serial); + return -1; +} + +/* Creates a general hso device */ +static struct hso_device *hso_create_device(struct usb_interface *intf, + int port_spec) +{ + struct hso_device *hso_dev; + + hso_dev = kzalloc(sizeof(*hso_dev), GFP_KERNEL); + if (!hso_dev) + return NULL; + + hso_dev->port_spec = port_spec; + hso_dev->usb = interface_to_usbdev(intf); + hso_dev->interface = intf; + kref_init(&hso_dev->ref); + mutex_init(&hso_dev->mutex); + + INIT_WORK(&hso_dev->async_get_intf, async_get_intf); + INIT_WORK(&hso_dev->async_put_intf, async_put_intf); + + return hso_dev; +} + +/* Removes a network device in the network device table */ +static int remove_net_device(struct hso_device *hso_dev) +{ + int i; + + for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { + if (network_table[i] == hso_dev) { + network_table[i] = NULL; + break; + } + } + if (i == HSO_MAX_NET_DEVICES) + return -1; + return 0; +} + +/* Frees our network device */ +static void hso_free_net_device(struct hso_device *hso_dev) +{ + int i; + struct hso_net *hso_net = dev2net(hso_dev); + + if (!hso_net) + return; + + remove_net_device(hso_net->parent); + + if (hso_net->net) + unregister_netdev(hso_net->net); + + /* start freeing */ + for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { + usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); + kfree(hso_net->mux_bulk_rx_buf_pool[i]); + hso_net->mux_bulk_rx_buf_pool[i] = NULL; + } + usb_free_urb(hso_net->mux_bulk_tx_urb); + kfree(hso_net->mux_bulk_tx_buf); + hso_net->mux_bulk_tx_buf = NULL; + + if (hso_net->net) + free_netdev(hso_net->net); + + kfree(hso_dev); +} + +static const struct net_device_ops hso_netdev_ops = { + .ndo_open = hso_net_open, + .ndo_stop = hso_net_close, + .ndo_start_xmit = hso_net_start_xmit, + .ndo_tx_timeout = hso_net_tx_timeout, +}; + +/* initialize the network interface */ +static void hso_net_init(struct net_device *net) +{ + struct hso_net *hso_net = netdev_priv(net); + + hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net)); + + /* fill in the other fields */ + net->netdev_ops = &hso_netdev_ops; + net->watchdog_timeo = HSO_NET_TX_TIMEOUT; + net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; + net->type = ARPHRD_NONE; + net->mtu = DEFAULT_MTU - 14; + net->tx_queue_len = 10; + net->ethtool_ops = &ops; + + /* and initialize the semaphore */ + spin_lock_init(&hso_net->net_lock); +} + +/* Adds a network device in the network device table */ +static int add_net_device(struct hso_device *hso_dev) +{ + int i; + + for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { + if (network_table[i] == NULL) { + network_table[i] = hso_dev; + break; + } + } + if (i == HSO_MAX_NET_DEVICES) + return -1; + return 0; +} + +static int hso_rfkill_set_block(void *data, bool blocked) +{ + struct hso_device *hso_dev = data; + int enabled = !blocked; + int rv; + + mutex_lock(&hso_dev->mutex); + if (hso_dev->usb_gone) + rv = 0; + else + rv = usb_control_msg(hso_dev->usb, usb_sndctrlpipe(hso_dev->usb, 0), + enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, + USB_CTRL_SET_TIMEOUT); + mutex_unlock(&hso_dev->mutex); + return rv; +} + +static const struct rfkill_ops hso_rfkill_ops = { + .set_block = hso_rfkill_set_block, +}; + +/* Creates and sets up everything for rfkill */ +static void hso_create_rfkill(struct hso_device *hso_dev, + struct usb_interface *interface) +{ + struct hso_net *hso_net = dev2net(hso_dev); + struct device *dev = &hso_net->net->dev; + static u32 rfkill_counter; + + snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", + rfkill_counter++); + + hso_net->rfkill = rfkill_alloc(hso_net->name, + &interface_to_usbdev(interface)->dev, + RFKILL_TYPE_WWAN, + &hso_rfkill_ops, hso_dev); + if (!hso_net->rfkill) + return; + + if (rfkill_register(hso_net->rfkill) < 0) { + rfkill_destroy(hso_net->rfkill); + hso_net->rfkill = NULL; + dev_err(dev, "%s - Failed to register rfkill\n", __func__); + return; + } +} + +static struct device_type hso_type = { + .name = "wwan", +}; + +/* Creates our network device */ +static struct hso_device *hso_create_net_device(struct usb_interface *interface, + int port_spec) +{ + int result, i; + struct net_device *net; + struct hso_net *hso_net; + struct hso_device *hso_dev; + + hso_dev = hso_create_device(interface, port_spec); + if (!hso_dev) + return NULL; + + /* allocate our network device, then we can put in our private data */ + /* call hso_net_init to do the basic initialization */ + net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, + hso_net_init); + if (!net) { + dev_err(&interface->dev, "Unable to create ethernet device\n"); + goto err_hso_dev; + } + + hso_net = netdev_priv(net); + + hso_dev->port_data.dev_net = hso_net; + hso_net->net = net; + hso_net->parent = hso_dev; + + hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, + USB_DIR_IN); + if (!hso_net->in_endp) { + dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); + goto err_net; + } + hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, + USB_DIR_OUT); + if (!hso_net->out_endp) { + dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); + goto err_net; + } + SET_NETDEV_DEV(net, &interface->dev); + SET_NETDEV_DEVTYPE(net, &hso_type); + + /* start allocating */ + for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { + hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); + if (!hso_net->mux_bulk_rx_urb_pool[i]) + goto err_mux_bulk_rx; + hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, + GFP_KERNEL); + if (!hso_net->mux_bulk_rx_buf_pool[i]) + goto err_mux_bulk_rx; + } + hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!hso_net->mux_bulk_tx_urb) + goto err_mux_bulk_rx; + hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); + if (!hso_net->mux_bulk_tx_buf) + goto err_free_tx_urb; + + result = add_net_device(hso_dev); + if (result) { + dev_err(&interface->dev, "Failed to add net device\n"); + goto err_free_tx_buf; + } + + /* registering our net device */ + result = register_netdev(net); + if (result) { + dev_err(&interface->dev, "Failed to register device\n"); + goto err_rmv_ndev; + } + + hso_log_port(hso_dev); + + hso_create_rfkill(hso_dev, interface); + + return hso_dev; + +err_rmv_ndev: + remove_net_device(hso_dev); +err_free_tx_buf: + kfree(hso_net->mux_bulk_tx_buf); +err_free_tx_urb: + usb_free_urb(hso_net->mux_bulk_tx_urb); +err_mux_bulk_rx: + for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { + usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); + kfree(hso_net->mux_bulk_rx_buf_pool[i]); + } +err_net: + free_netdev(net); +err_hso_dev: + kfree(hso_dev); + return NULL; +} + +static void hso_free_tiomget(struct hso_serial *serial) +{ + struct hso_tiocmget *tiocmget; + if (!serial) + return; + tiocmget = serial->tiocmget; + if (tiocmget) { + usb_free_urb(tiocmget->urb); + tiocmget->urb = NULL; + serial->tiocmget = NULL; + kfree(tiocmget->serial_state_notification); + tiocmget->serial_state_notification = NULL; + kfree(tiocmget); + } +} + +/* Frees an AT channel ( goes for both mux and non-mux ) */ +static void hso_free_serial_device(struct hso_device *hso_dev) +{ + struct hso_serial *serial = dev2ser(hso_dev); + + if (!serial) + return; + + hso_serial_common_free(serial); + + if (serial->shared_int) { + mutex_lock(&serial->shared_int->shared_int_lock); + if (--serial->shared_int->ref_count == 0) + hso_free_shared_int(serial->shared_int); + else + mutex_unlock(&serial->shared_int->shared_int_lock); + } + hso_free_tiomget(serial); + kfree(serial); + kfree(hso_dev); +} + +/* Creates a bulk AT channel */ +static struct hso_device *hso_create_bulk_serial_device( + struct usb_interface *interface, int port) +{ + struct hso_device *hso_dev; + struct hso_serial *serial; + int num_urbs; + struct hso_tiocmget *tiocmget; + + hso_dev = hso_create_device(interface, port); + if (!hso_dev) + return NULL; + + serial = kzalloc(sizeof(*serial), GFP_KERNEL); + if (!serial) + goto exit; + + serial->parent = hso_dev; + hso_dev->port_data.dev_serial = serial; + + if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { + num_urbs = 2; + serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), + GFP_KERNEL); + if (!serial->tiocmget) + goto exit; + serial->tiocmget->serial_state_notification + = kzalloc(sizeof(struct hso_serial_state_notification), + GFP_KERNEL); + if (!serial->tiocmget->serial_state_notification) + goto exit; + tiocmget = serial->tiocmget; + tiocmget->endp = hso_get_ep(interface, + USB_ENDPOINT_XFER_INT, + USB_DIR_IN); + if (!tiocmget->endp) { + dev_err(&interface->dev, "Failed to find INT IN ep\n"); + goto exit; + } + + tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); + if (!tiocmget->urb) + goto exit; + + mutex_init(&tiocmget->mutex); + init_waitqueue_head(&tiocmget->waitq); + } else { + num_urbs = 1; + } + + if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, + BULK_URB_TX_SIZE)) + goto exit; + + serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, + USB_DIR_IN); + if (!serial->in_endp) { + dev_err(&interface->dev, "Failed to find BULK IN ep\n"); + goto exit2; + } + + if (! + (serial->out_endp = + hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { + dev_err(&interface->dev, "Failed to find BULK OUT ep\n"); + goto exit2; + } + + serial->write_data = hso_std_serial_write_data; + + /* setup the proc dirs and files if needed */ + hso_log_port(hso_dev); + + /* done, return it */ + return hso_dev; + +exit2: + hso_serial_tty_unregister(serial); + hso_serial_common_free(serial); +exit: + hso_free_tiomget(serial); + kfree(serial); + kfree(hso_dev); + return NULL; +} + +/* Creates a multiplexed AT channel */ +static +struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, + int port, + struct hso_shared_int *mux) +{ + struct hso_device *hso_dev; + struct hso_serial *serial; + int port_spec; + + port_spec = HSO_INTF_MUX; + port_spec &= ~HSO_PORT_MASK; + + port_spec |= hso_mux_to_port(port); + if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) + return NULL; + + hso_dev = hso_create_device(interface, port_spec); + if (!hso_dev) + return NULL; + + serial = kzalloc(sizeof(*serial), GFP_KERNEL); + if (!serial) + goto err_free_dev; + + hso_dev->port_data.dev_serial = serial; + serial->parent = hso_dev; + + if (hso_serial_common_create + (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) + goto err_free_serial; + + serial->tx_data_length--; + serial->write_data = hso_mux_serial_write_data; + + serial->shared_int = mux; + mutex_lock(&serial->shared_int->shared_int_lock); + serial->shared_int->ref_count++; + mutex_unlock(&serial->shared_int->shared_int_lock); + + /* setup the proc dirs and files if needed */ + hso_log_port(hso_dev); + + /* done, return it */ + return hso_dev; + +err_free_serial: + kfree(serial); +err_free_dev: + kfree(hso_dev); + return NULL; + +} + +static void hso_free_shared_int(struct hso_shared_int *mux) +{ + usb_free_urb(mux->shared_intr_urb); + kfree(mux->shared_intr_buf); + mutex_unlock(&mux->shared_int_lock); + kfree(mux); +} + +static +struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) +{ + struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); + + if (!mux) + return NULL; + + mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, + USB_DIR_IN); + if (!mux->intr_endp) { + dev_err(&interface->dev, "Can't find INT IN endpoint\n"); + goto exit; + } + + mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!mux->shared_intr_urb) + goto exit; + mux->shared_intr_buf = + kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), + GFP_KERNEL); + if (!mux->shared_intr_buf) + goto exit; + + mutex_init(&mux->shared_int_lock); + + return mux; + +exit: + kfree(mux->shared_intr_buf); + usb_free_urb(mux->shared_intr_urb); + kfree(mux); + return NULL; +} + +/* Gets the port spec for a certain interface */ +static int hso_get_config_data(struct usb_interface *interface) +{ + struct usb_device *usbdev = interface_to_usbdev(interface); + u8 *config_data = kmalloc(17, GFP_KERNEL); + u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber; + s32 result; + + if (!config_data) + return -ENOMEM; + if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), + 0x86, 0xC0, 0, 0, config_data, 17, + USB_CTRL_SET_TIMEOUT) != 0x11) { + kfree(config_data); + return -EIO; + } + + /* check if we have a valid interface */ + if (if_num > 16) { + kfree(config_data); + return -EINVAL; + } + + switch (config_data[if_num]) { + case 0x0: + result = 0; + break; + case 0x1: + result = HSO_PORT_DIAG; + break; + case 0x2: + result = HSO_PORT_GPS; + break; + case 0x3: + result = HSO_PORT_GPS_CONTROL; + break; + case 0x4: + result = HSO_PORT_APP; + break; + case 0x5: + result = HSO_PORT_APP2; + break; + case 0x6: + result = HSO_PORT_CONTROL; + break; + case 0x7: + result = HSO_PORT_NETWORK; + break; + case 0x8: + result = HSO_PORT_MODEM; + break; + case 0x9: + result = HSO_PORT_MSD; + break; + case 0xa: + result = HSO_PORT_PCSC; + break; + case 0xb: + result = HSO_PORT_VOICE; + break; + default: + result = 0; + } + + if (result) + result |= HSO_INTF_BULK; + + if (config_data[16] & 0x1) + result |= HSO_INFO_CRC_BUG; + + kfree(config_data); + return result; +} + +/* called once for each interface upon device insertion */ +static int hso_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + int mux, i, if_num, port_spec; + unsigned char port_mask; + struct hso_device *hso_dev = NULL; + struct hso_shared_int *shared_int; + struct hso_device *tmp_dev = NULL; + + if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { + dev_err(&interface->dev, "Not our interface\n"); + return -ENODEV; + } + + if_num = interface->cur_altsetting->desc.bInterfaceNumber; + + /* Get the interface/port specification from either driver_info or from + * the device itself */ + if (id->driver_info) { + /* if_num is controlled by the device, driver_info is a 0 terminated + * array. Make sure, the access is in bounds! */ + for (i = 0; i <= if_num; ++i) + if (((u32 *)(id->driver_info))[i] == 0) + goto exit; + port_spec = ((u32 *)(id->driver_info))[if_num]; + } else { + port_spec = hso_get_config_data(interface); + if (port_spec < 0) + goto exit; + } + + /* Check if we need to switch to alt interfaces prior to port + * configuration */ + if (interface->num_altsetting > 1) + usb_set_interface(interface_to_usbdev(interface), if_num, 1); + interface->needs_remote_wakeup = 1; + + /* Allocate new hso device(s) */ + switch (port_spec & HSO_INTF_MASK) { + case HSO_INTF_MUX: + if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { + /* Create the network device */ + if (!disable_net) { + hso_dev = hso_create_net_device(interface, + port_spec); + if (!hso_dev) + goto exit; + tmp_dev = hso_dev; + } + } + + if (hso_get_mux_ports(interface, &port_mask)) + /* TODO: de-allocate everything */ + goto exit; + + shared_int = hso_create_shared_int(interface); + if (!shared_int) + goto exit; + + for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { + if (port_mask & i) { + hso_dev = hso_create_mux_serial_device( + interface, i, shared_int); + if (!hso_dev) + goto exit; + } + } + + if (tmp_dev) + hso_dev = tmp_dev; + break; + + case HSO_INTF_BULK: + /* It's a regular bulk interface */ + if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { + if (!disable_net) + hso_dev = + hso_create_net_device(interface, port_spec); + } else { + hso_dev = + hso_create_bulk_serial_device(interface, port_spec); + } + if (!hso_dev) + goto exit; + break; + default: + goto exit; + } + + /* save our data pointer in this device */ + usb_set_intfdata(interface, hso_dev); + + /* done */ + return 0; +exit: + hso_free_interface(interface); + return -ENODEV; +} + +/* device removed, cleaning up */ +static void hso_disconnect(struct usb_interface *interface) +{ + hso_free_interface(interface); + + /* remove reference of our private data */ + usb_set_intfdata(interface, NULL); +} + +static void async_get_intf(struct work_struct *data) +{ + struct hso_device *hso_dev = + container_of(data, struct hso_device, async_get_intf); + usb_autopm_get_interface(hso_dev->interface); +} + +static void async_put_intf(struct work_struct *data) +{ + struct hso_device *hso_dev = + container_of(data, struct hso_device, async_put_intf); + usb_autopm_put_interface(hso_dev->interface); +} + +static int hso_get_activity(struct hso_device *hso_dev) +{ + if (hso_dev->usb->state == USB_STATE_SUSPENDED) { + if (!hso_dev->is_active) { + hso_dev->is_active = 1; + schedule_work(&hso_dev->async_get_intf); + } + } + + if (hso_dev->usb->state != USB_STATE_CONFIGURED) + return -EAGAIN; + + usb_mark_last_busy(hso_dev->usb); + + return 0; +} + +static int hso_put_activity(struct hso_device *hso_dev) +{ + if (hso_dev->usb->state != USB_STATE_SUSPENDED) { + if (hso_dev->is_active) { + hso_dev->is_active = 0; + schedule_work(&hso_dev->async_put_intf); + return -EAGAIN; + } + } + hso_dev->is_active = 0; + return 0; +} + +/* called by kernel when we need to suspend device */ +static int hso_suspend(struct usb_interface *iface, pm_message_t message) +{ + int i, result; + + /* Stop all serial ports */ + for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { + if (serial_table[i] && (serial_table[i]->interface == iface)) { + result = hso_stop_serial_device(serial_table[i]); + if (result) + goto out; + } + } + + /* Stop all network ports */ + for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { + if (network_table[i] && + (network_table[i]->interface == iface)) { + result = hso_stop_net_device(network_table[i]); + if (result) + goto out; + } + } + +out: + return 0; +} + +/* called by kernel when we need to resume device */ +static int hso_resume(struct usb_interface *iface) +{ + int i, result = 0; + struct hso_net *hso_net; + + /* Start all serial ports */ + for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { + if (serial_table[i] && (serial_table[i]->interface == iface)) { + if (dev2ser(serial_table[i])->port.count) { + result = + hso_start_serial_device(serial_table[i], GFP_NOIO); + hso_kick_transmit(dev2ser(serial_table[i])); + if (result) + goto out; + } + } + } + + /* Start all network ports */ + for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { + if (network_table[i] && + (network_table[i]->interface == iface)) { + hso_net = dev2net(network_table[i]); + if (hso_net->flags & IFF_UP) { + /* First transmit any lingering data, + then restart the device. */ + if (hso_net->skb_tx_buf) { + dev_dbg(&iface->dev, + "Transmitting" + " lingering data\n"); + hso_net_start_xmit(hso_net->skb_tx_buf, + hso_net->net); + hso_net->skb_tx_buf = NULL; + } + result = hso_start_net_device(network_table[i]); + if (result) + goto out; + } + } + } + +out: + return result; +} + +static void hso_serial_ref_free(struct kref *ref) +{ + struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); + + hso_free_serial_device(hso_dev); +} + +static void hso_free_interface(struct usb_interface *interface) +{ + struct hso_serial *serial; + int i; + + for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { + if (serial_table[i] && + (serial_table[i]->interface == interface)) { + serial = dev2ser(serial_table[i]); + tty_port_tty_hangup(&serial->port, false); + mutex_lock(&serial->parent->mutex); + serial->parent->usb_gone = 1; + mutex_unlock(&serial->parent->mutex); + cancel_work_sync(&serial_table[i]->async_put_intf); + cancel_work_sync(&serial_table[i]->async_get_intf); + hso_serial_tty_unregister(serial); + kref_put(&serial->parent->ref, hso_serial_ref_free); + } + } + + for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { + if (network_table[i] && + (network_table[i]->interface == interface)) { + struct rfkill *rfk = dev2net(network_table[i])->rfkill; + /* hso_stop_net_device doesn't stop the net queue since + * traffic needs to start it again when suspended */ + netif_stop_queue(dev2net(network_table[i])->net); + hso_stop_net_device(network_table[i]); + cancel_work_sync(&network_table[i]->async_put_intf); + cancel_work_sync(&network_table[i]->async_get_intf); + if (rfk) { + rfkill_unregister(rfk); + rfkill_destroy(rfk); + } + hso_free_net_device(network_table[i]); + } + } +} + +/* Helper functions */ + +/* Get the endpoint ! */ +static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, + int type, int dir) +{ + int i; + struct usb_host_interface *iface = intf->cur_altsetting; + struct usb_endpoint_descriptor *endp; + + for (i = 0; i < iface->desc.bNumEndpoints; i++) { + endp = &iface->endpoint[i].desc; + if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && + (usb_endpoint_type(endp) == type)) + return endp; + } + + return NULL; +} + +/* Get the byte that describes which ports are enabled */ +static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) +{ + int i; + struct usb_host_interface *iface = intf->cur_altsetting; + + if (iface->extralen == 3) { + *ports = iface->extra[2]; + return 0; + } + + for (i = 0; i < iface->desc.bNumEndpoints; i++) { + if (iface->endpoint[i].extralen == 3) { + *ports = iface->endpoint[i].extra[2]; + return 0; + } + } + + return -1; +} + +/* interrupt urb needs to be submitted, used for serial read of muxed port */ +static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, + struct usb_device *usb, gfp_t gfp) +{ + int result; + + usb_fill_int_urb(shared_int->shared_intr_urb, usb, + usb_rcvintpipe(usb, + shared_int->intr_endp->bEndpointAddress & 0x7F), + shared_int->shared_intr_buf, + 1, + intr_callback, shared_int, + shared_int->intr_endp->bInterval); + + result = usb_submit_urb(shared_int->shared_intr_urb, gfp); + if (result) + dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, + result); + + return result; +} + +/* operations setup of the serial interface */ +static const struct tty_operations hso_serial_ops = { + .open = hso_serial_open, + .close = hso_serial_close, + .write = hso_serial_write, + .write_room = hso_serial_write_room, + .cleanup = hso_serial_cleanup, + .ioctl = hso_serial_ioctl, + .set_termios = hso_serial_set_termios, + .chars_in_buffer = hso_serial_chars_in_buffer, + .tiocmget = hso_serial_tiocmget, + .tiocmset = hso_serial_tiocmset, + .get_icount = hso_get_count, + .unthrottle = hso_unthrottle +}; + +static struct usb_driver hso_driver = { + .name = driver_name, + .probe = hso_probe, + .disconnect = hso_disconnect, + .id_table = hso_ids, + .suspend = hso_suspend, + .resume = hso_resume, + .reset_resume = hso_resume, + .supports_autosuspend = 1, + .disable_hub_initiated_lpm = 1, +}; + +static int __init hso_init(void) +{ + int i; + int result; + + /* put it in the log */ + pr_info("%s\n", version); + + /* Initialise the serial table semaphore and table */ + for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) + serial_table[i] = NULL; + + /* allocate our driver using the proper amount of supported minors */ + tty_drv = tty_alloc_driver(HSO_SERIAL_TTY_MINORS, TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV); + if (IS_ERR(tty_drv)) + return PTR_ERR(tty_drv); + + /* fill in all needed values */ + tty_drv->driver_name = driver_name; + tty_drv->name = tty_filename; + + /* if major number is provided as parameter, use that one */ + if (tty_major) + tty_drv->major = tty_major; + + tty_drv->minor_start = 0; + tty_drv->type = TTY_DRIVER_TYPE_SERIAL; + tty_drv->subtype = SERIAL_TYPE_NORMAL; + tty_drv->init_termios = tty_std_termios; + hso_init_termios(&tty_drv->init_termios); + tty_set_operations(tty_drv, &hso_serial_ops); + + /* register the tty driver */ + result = tty_register_driver(tty_drv); + if (result) { + pr_err("%s - tty_register_driver failed(%d)\n", + __func__, result); + goto err_free_tty; + } + + /* register this module as an usb driver */ + result = usb_register(&hso_driver); + if (result) { + pr_err("Could not register hso driver - error: %d\n", result); + goto err_unreg_tty; + } + + /* done */ + return 0; +err_unreg_tty: + tty_unregister_driver(tty_drv); +err_free_tty: + tty_driver_kref_put(tty_drv); + return result; +} + +static void __exit hso_exit(void) +{ + pr_info("unloaded\n"); + + tty_unregister_driver(tty_drv); + /* deregister the usb driver */ + usb_deregister(&hso_driver); + tty_driver_kref_put(tty_drv); +} + +/* Module definitions */ +module_init(hso_init); +module_exit(hso_exit); + +MODULE_AUTHOR(MOD_AUTHOR); +MODULE_DESCRIPTION(MOD_DESCRIPTION); +MODULE_LICENSE("GPL"); + +/* change the debug level (eg: insmod hso.ko debug=0x04) */ +MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); +module_param(debug, int, 0644); + +/* set the major tty number (eg: insmod hso.ko tty_major=245) */ +MODULE_PARM_DESC(tty_major, "Set the major tty number"); +module_param(tty_major, int, 0644); + +/* disable network interface (eg: insmod hso.ko disable_net=1) */ +MODULE_PARM_DESC(disable_net, "Disable the network interface"); +module_param(disable_net, int, 0644); |