--- /dev/null
+/******************************************************************************
+ *
+ * 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.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA
+ *
+ *
+ *****************************************************************************/
+
+/******************************************************************************
+ *
+ * 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.
+ *
+ *****************************************************************************/
+
+#include <linux/sched.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 MOD_LICENSE "GPL"
+
+#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 D__(lvl_, fmt, arg...) \
+ do { \
+ printk(lvl_ "[%d:%s]: " fmt "\n", \
+ __LINE__, __func__, ## arg); \
+ } while (0)
+
+#define D_(lvl, args...) \
+ do { \
+ if (lvl & debug) \
+ D__(KERN_INFO, args); \
+ } while (0)
+
+#define D1(args...) D_(0x01, ##args)
+#define D2(args...) D_(0x02, ##args)
+#define D3(args...) D_(0x04, ##args)
+#define D4(args...) D_(0x08, ##args)
+#define D5(args...) D_(0x10, ##args)
+
+/*****************************************************************************/
+/* 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 spinlock_t 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 hso_sysfs_show_porttype(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(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
+
+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 get_free_serial_index(void)
+{
+ 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) {
+ spin_unlock_irqrestore(&serial_table_lock, flags);
+ return index;
+ }
+ }
+ spin_unlock_irqrestore(&serial_table_lock, flags);
+
+ printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
+ return -1;
+}
+
+static void set_serial_by_index(unsigned index, struct hso_serial *serial)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&serial_table_lock, flags);
+ if (serial)
+ serial_table[index] = serial->parent;
+ else
+ serial_table[index] = 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 */
+ D1("%s: received USB status - %s (%d)", 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);
+ D1("len: %d/%d", 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)
+{
+ 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 &&
+ (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
+ 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;
+ unsigned char *tmp_rx_buf;
+
+ /* log if needed */
+ D1("Rx %d bytes", 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. */
+ D1("could not allocate memory");
+ odev->rx_parse_state = WAIT_SYNC;
+ continue;
+ }
+
+ /* Copy what we got so far. make room for iphdr
+ * after tail. */
+ tmp_rx_buf =
+ skb_put(odev->skb_rx_buf,
+ sizeof(struct iphdr));
+ memcpy(tmp_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. */
+ tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
+ memcpy(tmp_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:
+ D1(" W_S");
+ count = 0;
+ break;
+ default:
+ D1(" ");
+ 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;
+ 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)) {
+ D1("BULK IN callback but driver is not active!");
+ 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(&odev->net_lock);
+ packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
+ (urb->transfer_buffer_length >
+ urb->actual_length) ? 1 : 0);
+ spin_unlock(&odev->net_lock);
+ }
+
+ /* 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 ktermios *old)
+{
+ struct hso_serial *serial = tty->driver_data;
+
+ if (!serial) {
+ printk(KERN_ERR "%s: no tty structures", __func__);
+ return;
+ }
+
+ D4("port %d", 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;
+
+ D4("\n--- Got serial_read_bulk callback %02x ---", status);
+
+ /* sanity check */
+ if (!serial) {
+ D1("serial == NULL");
+ return;
+ }
+ if (status) {
+ handle_usb_error(status, __func__, serial->parent);
+ return;
+ }
+
+ D1("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(&serial->serial_lock);
+ serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
+ put_rxbuf_data_and_resubmit_bulk_urb(serial);
+ spin_unlock(&serial->serial_lock);
+}
+
+/*
+ * This needs to be a tasklet otherwise we will
+ * end up recursively calling this function.
+ */
+static void hso_unthrottle_tasklet(struct hso_serial *serial)
+{
+ 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;
+ D1("Failed to open port");
+ return -ENODEV;
+ }
+
+ mutex_lock(&serial->parent->mutex);
+ result = usb_autopm_get_interface(serial->parent->interface);
+ if (result < 0)
+ goto err_out;
+
+ D1("Opening %d", 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, NULL);
+ tasklet_init(&serial->unthrottle_tasklet,
+ (void (*)(unsigned long))hso_unthrottle_tasklet,
+ (unsigned long)serial);
+ 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 {
+ D1("Port was already open");
+ }
+
+ 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;
+
+ D1("Closing serial port");
+
+ /* 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 int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
+ int count)
+{
+ struct hso_serial *serial = tty->driver_data;
+ int space, tx_bytes;
+ unsigned long flags;
+
+ /* sanity check */
+ if (serial == NULL) {
+ printk(KERN_ERR "%s: serial is NULL\n", __func__);
+ return -ENODEV;
+ }
+
+ spin_lock_irqsave(&serial->serial_lock, flags);
+
+ space = serial->tx_data_length - serial->tx_buffer_count;
+ tx_bytes = (count < space) ? count : space;
+
+ if (!tx_bytes)
+ goto out;
+
+ memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
+ serial->tx_buffer_count += tx_bytes;
+
+out:
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
+
+ hso_kick_transmit(serial);
+ /* done */
+ return tx_bytes;
+}
+
+/* how much room is there for writing */
+static int hso_serial_write_room(struct tty_struct *tty)
+{
+ struct hso_serial *serial = tty->driver_data;
+ 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, struct ktermios *old)
+{
+ struct hso_serial *serial = tty->driver_data;
+ unsigned long flags;
+
+ if (old)
+ D5("Termios called with: cflags new[%d] - old[%d]",
+ tty->termios.c_cflag, old->c_cflag);
+
+ /* the actual setup */
+ spin_lock_irqsave(&serial->serial_lock, flags);
+ if (serial->port.count)
+ _hso_serial_set_termios(tty, old);
+ else
+ tty->termios = *old;
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
+
+ /* done */
+}
+
+/* how many characters in the buffer */
+static int hso_serial_chars_in_buffer(struct tty_struct *tty)
+{
+ struct hso_serial *serial = tty->driver_data;
+ int chars;
+ unsigned long flags;
+
+ /* 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 {
+
+ 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(&serial->serial_lock);
+ 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(&serial->serial_lock);
+ 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) {
+ D1("no tty structures");
+ 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) {
+ D1("no tty structures");
+ 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_rcvctrlpipe(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;
+ D4("IOCTL cmd: %d, arg: %ld", 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)
+{
+ u8 *temp;
+ 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 */
+ temp = serial->tx_buffer;
+ serial->tx_buffer = serial->tx_data;
+ serial->tx_data = temp;
+ serial->tx_data_count = serial->tx_buffer_count;
+ serial->tx_buffer_count = 0;
+
+ /* If temp is set, it means we switched buffers */
+ if (temp && 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) {
+ printk(KERN_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 */
+ D2("%s command (%02x) len: %d, port: %d",
+ 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;
+ 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;
+ }
+ D4("\n--- Got intr callback 0x%02X ---", status);
+
+ /* what request? */
+ port_req = urb->transfer_buffer;
+ D4(" 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) {
+ D1("Pending read interrupt on port %d\n", i);
+ spin_lock(&serial->serial_lock);
+ 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 {
+ D1("Already a read pending on "
+ "port %d or port not open\n", i);
+ }
+ spin_unlock(&serial->serial_lock);
+ }
+ }
+ }
+ /* 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;
+
+ /* sanity check */
+ if (!serial) {
+ D1("serial == NULL");
+ return;
+ }
+
+ spin_lock(&serial->serial_lock);
+ serial->tx_urb_used = 0;
+ spin_unlock(&serial->serial_lock);
+ 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);
+
+ D1(" ");
+}
+
+/* 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;
+
+ /* sanity check */
+ if (!serial)
+ return;
+
+ spin_lock(&serial->serial_lock);
+ serial->tx_urb_used = 0;
+ spin_unlock(&serial->serial_lock);
+ if (status) {
+ handle_usb_error(status, __func__, serial->parent);
+ return;
+ }
+
+ /* what request? */
+ req = (struct usb_ctrlrequest *)(urb->setup_packet);
+ D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
+ D4("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(&serial->serial_lock);
+ put_rxbuf_data_and_resubmit_ctrl_urb(serial);
+ spin_unlock(&serial->serial_lock);
+ } 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) {
+ D1("serial = NULL");
+ return -2;
+ }
+
+ tty = tty_port_tty_get(&serial->port);
+
+ if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
+ tty_kref_put(tty);
+ return -1;
+ }
+
+ /* Push data to tty */
+ D1("data to push to tty");
+ 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);
+}
+
+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)
+{
+ struct device *dev;
+ int minor;
+ int i;
+
+ tty_port_init(&serial->port);
+
+ minor = get_free_serial_index();
+ if (minor < 0)
+ goto exit;
+
+ /* register our minor number */
+ serial->parent->dev = tty_port_register_device_attr(&serial->port,
+ tty_drv, minor, &serial->parent->interface->dev,
+ serial->parent, hso_serial_dev_groups);
+ dev = serial->parent->dev;
+
+ /* fill in specific data for later use */
+ serial->minor = minor;
+ 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]) {
+ dev_err(dev, "Could not allocate urb?\n");
+ 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) {
+ dev_err(dev, "Could not allocate urb?\n");
+ 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);
+ 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_ATOMIC);
+ 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);
+
+ D1("sizeof hso_net is %d", (int)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_rcvctrlpipe(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) {
+ dev_err(dev, "%s - Out of memory\n", __func__);
+ 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 exit;
+ }
+
+ 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 exit;
+ }
+ 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 exit;
+ }
+ SET_NETDEV_DEV(net, &interface->dev);
+ SET_NETDEV_DEVTYPE(net, &hso_type);
+
+ /* registering our net device */
+ result = register_netdev(net);
+ if (result) {
+ dev_err(&interface->dev, "Failed to register device\n");
+ goto exit;
+ }
+
+ /* 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]) {
+ dev_err(&interface->dev, "Could not allocate rx urb\n");
+ goto exit;
+ }
+ 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 exit;
+ }
+ hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!hso_net->mux_bulk_tx_urb) {
+ dev_err(&interface->dev, "Could not allocate tx urb\n");
+ goto exit;
+ }
+ hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
+ if (!hso_net->mux_bulk_tx_buf)
+ goto exit;
+
+ add_net_device(hso_dev);
+
+ hso_log_port(hso_dev);
+
+ hso_create_rfkill(hso_dev, interface);
+
+ return hso_dev;
+exit:
+ hso_free_net_device(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);
+ }
+}
+
+/* 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);
+ /* it isn't going to break our heart if serial->tiocmget
+ * allocation fails don't bother checking this.
+ */
+ if (serial->tiocmget) {
+ tiocmget = serial->tiocmget;
+ tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (tiocmget->urb) {
+ mutex_init(&tiocmget->mutex);
+ init_waitqueue_head(&tiocmget->waitq);
+ tiocmget->endp = hso_get_ep(
+ interface,
+ USB_ENDPOINT_XFER_INT,
+ USB_DIR_IN);
+ } else
+ hso_free_tiomget(serial);
+ }
+ }
+ 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 IN ep\n");
+ goto exit2;
+ }
+
+ serial->write_data = hso_std_serial_write_data;
+
+ /* and record this serial */
+ set_serial_by_index(serial->minor, serial);
+
+ /* 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 exit;
+
+ 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 exit;
+
+ 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);
+
+ /* and record this serial */
+ set_serial_by_index(serial->minor, serial);
+
+ /* setup the proc dirs and files if needed */
+ hso_log_port(hso_dev);
+
+ /* done, return it */
+ return hso_dev;
+
+exit:
+ if (serial) {
+ tty_unregister_device(tty_drv, serial->minor);
+ kfree(serial);
+ }
+ 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) {
+ dev_err(&interface->dev, "Could not allocate intr urb?\n");
+ 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;
+ }
+
+ 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)
+ port_spec = ((u32 *)(id->driver_info))[if_num];
+ else
+ port_spec = hso_get_config_data(interface);
+
+ /* 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_table[i]->ref, hso_serial_ref_free);
+ set_serial_by_index(i, NULL);
+ }
+ }
+
+ 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 */
+ printk(KERN_INFO "hso: %s\n", version);
+
+ /* Initialise the serial table semaphore and table */
+ spin_lock_init(&serial_table_lock);
+ 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 = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
+ if (!tty_drv)
+ return -ENOMEM;
+
+ /* 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->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ 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) {
+ printk(KERN_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) {
+ printk(KERN_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:
+ put_tty_driver(tty_drv);
+ return result;
+}
+
+static void __exit hso_exit(void)
+{
+ printk(KERN_INFO "hso: unloaded\n");
+
+ tty_unregister_driver(tty_drv);
+ put_tty_driver(tty_drv);
+ /* deregister the usb driver */
+ usb_deregister(&hso_driver);
+}
+
+/* Module definitions */
+module_init(hso_init);
+module_exit(hso_exit);
+
+MODULE_AUTHOR(MOD_AUTHOR);
+MODULE_DESCRIPTION(MOD_DESCRIPTION);
+MODULE_LICENSE(MOD_LICENSE);
+
+/* change the debug level (eg: insmod hso.ko debug=0x04) */
+MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
+module_param(debug, int, S_IRUGO | S_IWUSR);
+
+/* 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, S_IRUGO | S_IWUSR);
+
+/* disable network interface (eg: insmod hso.ko disable_net=1) */
+MODULE_PARM_DESC(disable_net, "Disable the network interface");
+module_param(disable_net, int, S_IRUGO | S_IWUSR);
Code Review / kvmfornfv.git / blobdiff