| /****************************************************************************** |
| * |
| * 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/timer.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 |
| |
| static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) |
| { |
| if (tty) |
| return tty->driver_data; |
| return NULL; |
| } |
| |
| /*****************************************************************************/ |
| /* 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; |
| |
| 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_INDEX (0x2) |
| #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; |
| |
| /* from usb_serial_port */ |
| struct tty_struct *tty; |
| int open_count; |
| 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; |
| u16 curr_rx_urb_offset; |
| u8 rx_urb_filled[MAX_RX_URBS]; |
| struct tasklet_struct unthrottle_tasklet; |
| struct work_struct retry_unthrottle_workqueue; |
| }; |
| |
| 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 work_struct reset_device; |
| |
| 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); |
| static void reset_device(struct work_struct *data); |
| /*****************************************************************************/ |
| /* 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, 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 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) |
| schedule_work(&hso_dev->reset_device); |
| 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; |
| return; |
| } |
| |
| /* 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 = get_serial_by_tty(tty); |
| struct ktermios *termios; |
| |
| if (!serial) { |
| printk(KERN_ERR "%s: no tty structures", __func__); |
| return; |
| } |
| |
| D4("port %d", serial->minor); |
| |
| /* |
| * Fix up unsupported bits |
| */ |
| termios = tty->termios; |
| termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ |
| |
| 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_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->open_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; |
| |
| /* sanity check */ |
| if (!serial) { |
| D1("serial == NULL"); |
| return; |
| } else if (status) { |
| handle_usb_error(status, __func__, serial->parent); |
| return; |
| } |
| |
| D4("\n--- Got serial_read_bulk callback %02x ---", status); |
| D1("Actual length = %d\n", urb->actual_length); |
| DUMP1(urb->transfer_buffer, urb->actual_length); |
| |
| /* Anyone listening? */ |
| if (serial->open_count == 0) |
| return; |
| |
| if (status == 0) { |
| 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); |
| } else if (status == -ENOENT || status == -ECONNRESET) { |
| /* Unlinked - check for throttled port. */ |
| D2("Port %d, successfully unlinked urb", serial->minor); |
| spin_lock(&serial->serial_lock); |
| serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; |
| hso_resubmit_rx_bulk_urb(serial, urb); |
| spin_unlock(&serial->serial_lock); |
| } else { |
| D2("Port %d, status = %d for read urb", serial->minor, status); |
| return; |
| } |
| } |
| |
| /* |
| * 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 = get_serial_by_tty(tty); |
| |
| tasklet_hi_schedule(&serial->unthrottle_tasklet); |
| } |
| |
| static void hso_unthrottle_workfunc(struct work_struct *work) |
| { |
| struct hso_serial *serial = |
| container_of(work, struct hso_serial, |
| retry_unthrottle_workqueue); |
| hso_unthrottle_tasklet(serial); |
| } |
| |
| /* 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); |
| kref_get(&serial->parent->ref); |
| |
| /* setup */ |
| spin_lock_irq(&serial->serial_lock); |
| tty->driver_data = serial; |
| tty_kref_put(serial->tty); |
| serial->tty = tty_kref_get(tty); |
| spin_unlock_irq(&serial->serial_lock); |
| |
| /* check for port already opened, if not set the termios */ |
| serial->open_count++; |
| if (serial->open_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); |
| INIT_WORK(&serial->retry_unthrottle_workqueue, |
| hso_unthrottle_workfunc); |
| result = hso_start_serial_device(serial->parent, GFP_KERNEL); |
| if (result) { |
| hso_stop_serial_device(serial->parent); |
| serial->open_count--; |
| kref_put(&serial->parent->ref, hso_serial_ref_free); |
| } |
| } 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->open_count--; |
| |
| if (serial->open_count <= 0) { |
| serial->open_count = 0; |
| spin_lock_irq(&serial->serial_lock); |
| if (serial->tty == tty) { |
| serial->tty->driver_data = NULL; |
| serial->tty = NULL; |
| tty_kref_put(tty); |
| } |
| spin_unlock_irq(&serial->serial_lock); |
| if (!usb_gone) |
| hso_stop_serial_device(serial->parent); |
| tasklet_kill(&serial->unthrottle_tasklet); |
| cancel_work_sync(&serial->retry_unthrottle_workqueue); |
| } |
| |
| if (!usb_gone) |
| usb_autopm_put_interface(serial->parent->interface); |
| |
| mutex_unlock(&serial->parent->mutex); |
| |
| kref_put(&serial->parent->ref, hso_serial_ref_free); |
| } |
| |
| /* close the requested serial port */ |
| static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, |
| int count) |
| { |
| struct hso_serial *serial = get_serial_by_tty(tty); |
| 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 = get_serial_by_tty(tty); |
| 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; |
| } |
| |
| /* setup the term */ |
| static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
| { |
| struct hso_serial *serial = get_serial_by_tty(tty); |
| 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->open_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 = get_serial_by_tty(tty); |
| 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; |
| |
| /* Sanity checks */ |
| if (!serial) |
| return; |
| if (status) { |
| handle_usb_error(status, __func__, serial->parent); |
| return; |
| } |
| tiocmget = serial->tiocmget; |
| if (!tiocmget) |
| return; |
| usb = serial->parent->usb; |
| 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) != W_INDEX || |
| 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; |
| } |
| 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 = get_serial_by_tty(tty); |
| 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 = get_serial_by_tty(tty); |
| 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 = get_serial_by_tty(tty); |
| |
| /* sanity check */ |
| if (!serial) { |
| D1("no tty structures"); |
| return -EINVAL; |
| } |
| |
| if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) |
| return -EINVAL; |
| |
| if_num = serial->parent->interface->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 = get_serial_by_tty(tty); |
| 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->open_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; |
| struct tty_struct *tty; |
| |
| /* sanity check */ |
| if (!serial) { |
| D1("serial == NULL"); |
| return; |
| } |
| |
| spin_lock(&serial->serial_lock); |
| serial->tx_urb_used = 0; |
| tty = tty_kref_get(serial->tty); |
| spin_unlock(&serial->serial_lock); |
| if (status) { |
| handle_usb_error(status, __func__, serial->parent); |
| tty_kref_put(tty); |
| return; |
| } |
| hso_put_activity(serial->parent); |
| if (tty) { |
| tty_wakeup(tty); |
| tty_kref_put(tty); |
| } |
| 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; |
| struct tty_struct *tty; |
| |
| /* sanity check */ |
| if (!serial) |
| return; |
| |
| spin_lock(&serial->serial_lock); |
| serial->tx_urb_used = 0; |
| tty = tty_kref_get(serial->tty); |
| spin_unlock(&serial->serial_lock); |
| if (status) { |
| handle_usb_error(status, __func__, serial->parent); |
| tty_kref_put(tty); |
| 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); |
| if (tty) |
| tty_wakeup(tty); |
| /* response to a write command */ |
| hso_kick_transmit(serial); |
| } |
| tty_kref_put(tty); |
| } |
| |
| /* handle RX data for serial port */ |
| static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) |
| { |
| struct tty_struct *tty; |
| int write_length_remaining = 0; |
| int curr_write_len; |
| |
| /* Sanity check */ |
| if (urb == NULL || serial == NULL) { |
| D1("serial = NULL"); |
| return -2; |
| } |
| |
| /* All callers to put_rxbuf_data hold serial_lock */ |
| tty = tty_kref_get(serial->tty); |
| |
| /* Push data to tty */ |
| if (tty) { |
| write_length_remaining = urb->actual_length - |
| serial->curr_rx_urb_offset; |
| D1("data to push to tty"); |
| while (write_length_remaining) { |
| if (test_bit(TTY_THROTTLED, &tty->flags)) { |
| tty_kref_put(tty); |
| return -1; |
| } |
| curr_write_len = tty_insert_flip_string |
| (tty, urb->transfer_buffer + |
| serial->curr_rx_urb_offset, |
| write_length_remaining); |
| serial->curr_rx_urb_offset += curr_write_len; |
| write_length_remaining -= curr_write_len; |
| tty_flip_buffer_push(tty); |
| } |
| } |
| if (write_length_remaining == 0) { |
| serial->curr_rx_urb_offset = 0; |
| serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; |
| } |
| tty_kref_put(tty); |
| return write_length_remaining; |
| } |
| |
| |
| /* 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; |
| serial->curr_rx_urb_offset = 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_common_free(struct hso_serial *serial) |
| { |
| int i; |
| |
| if (serial->parent->dev) |
| device_remove_file(serial->parent->dev, &dev_attr_hsotype); |
| |
| tty_unregister_device(tty_drv, serial->minor); |
| |
| 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_data); |
| } |
| |
| 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; |
| |
| minor = get_free_serial_index(); |
| if (minor < 0) |
| goto exit; |
| |
| /* register our minor number */ |
| serial->parent->dev = tty_register_device(tty_drv, minor, |
| &serial->parent->interface->dev); |
| dev = serial->parent->dev; |
| dev_set_drvdata(dev, serial->parent); |
| i = device_create_file(dev, &dev_attr_hsotype); |
| |
| /* 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]) { |
| dev_err(dev, "%s - Out of memory\n", __func__); |
| 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) { |
| dev_err(dev, "%s - Out of memory\n", __func__); |
| goto exit; |
| } |
| serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); |
| if (!serial->tx_buffer) { |
| dev_err(dev, "%s - Out of memory\n", __func__); |
| goto exit; |
| } |
| |
| return 0; |
| exit: |
| 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); |
| INIT_WORK(&hso_dev->reset_device, reset_device); |
| |
| 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; |
| SET_ETHTOOL_OPS(net, &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; |
| char *rfkn; |
| |
| rfkn = kzalloc(20, GFP_KERNEL); |
| if (!rfkn) |
| dev_err(dev, "%s - Out of memory\n", __func__); |
| |
| snprintf(rfkn, 20, "hso-%d", |
| interface->altsetting->desc.bInterfaceNumber); |
| |
| hso_net->rfkill = rfkill_alloc(rfkn, |
| &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__); |
| kfree(rfkn); |
| return; |
| } |
| if (rfkill_register(hso_net->rfkill) < 0) { |
| rfkill_destroy(hso_net->rfkill); |
| kfree(rfkn); |
| 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", 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]) { |
| dev_err(&interface->dev, "Could not allocate rx buf\n"); |
| 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) { |
| dev_err(&interface->dev, "Could not allocate tx buf\n"); |
| 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; |
| set_serial_by_index(serial->minor, NULL); |
| |
| 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_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); |
| } |
| if (hso_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) { |
| 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) { |
| dev_err(&interface->dev, "Could not allocate intr buf?\n"); |
| 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[17]; |
| u32 if_num = interface->altsetting->desc.bInterfaceNumber; |
| s32 result; |
| |
| if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), |
| 0x86, 0xC0, 0, 0, config_data, 17, |
| USB_CTRL_SET_TIMEOUT) != 0x11) { |
| 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; |
| |
| 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_num = interface->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); |
| |
| if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { |
| dev_err(&interface->dev, "Not our interface\n"); |
| return -ENODEV; |
| } |
| /* 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])->open_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 reset_device(struct work_struct *data) |
| { |
| struct hso_device *hso_dev = |
| container_of(data, struct hso_device, reset_device); |
| struct usb_device *usb = hso_dev->usb; |
| int result; |
| |
| if (hso_dev->usb_gone) { |
| D1("No reset during disconnect\n"); |
| } else { |
| result = usb_lock_device_for_reset(usb, hso_dev->interface); |
| if (result < 0) |
| D1("unable to lock device for reset: %d\n", result); |
| else { |
| usb_reset_device(usb); |
| usb_unlock_device(usb); |
| } |
| } |
| } |
| |
| 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 *hso_dev; |
| struct tty_struct *tty; |
| int i; |
| |
| for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { |
| if (serial_table[i] && |
| (serial_table[i]->interface == interface)) { |
| hso_dev = dev2ser(serial_table[i]); |
| spin_lock_irq(&hso_dev->serial_lock); |
| tty = tty_kref_get(hso_dev->tty); |
| spin_unlock_irq(&hso_dev->serial_lock); |
| if (tty) |
| tty_hangup(tty); |
| mutex_lock(&hso_dev->parent->mutex); |
| tty_kref_put(tty); |
| hso_dev->parent->usb_gone = 1; |
| mutex_unlock(&hso_dev->parent->mutex); |
| kref_put(&serial_table[i]->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, |
| .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, |
| }; |
| |
| 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->magic = TTY_DRIVER_MAGIC; |
| tty_drv->owner = THIS_MODULE; |
| 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->num = HSO_SERIAL_TTY_MINORS; |
| 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); |
| return result; |
| } |
| |
| /* 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); |
| /* cleanup serial interface */ |
| tty_unregister_driver(tty_drv); |
| return result; |
| } |
| |
| /* done */ |
| return 0; |
| } |
| |
| static void __exit hso_exit(void) |
| { |
| printk(KERN_INFO "hso: unloaded\n"); |
| |
| tty_unregister_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); |