diff options
Diffstat (limited to 'drivers/staging/serqt_usb/serqt_usb.c')
| -rw-r--r-- | drivers/staging/serqt_usb/serqt_usb.c | 2779 |
1 files changed, 2779 insertions, 0 deletions
diff --git a/drivers/staging/serqt_usb/serqt_usb.c b/drivers/staging/serqt_usb/serqt_usb.c new file mode 100644 index 000000000000..1781510c53fd --- /dev/null +++ b/drivers/staging/serqt_usb/serqt_usb.c @@ -0,0 +1,2779 @@ +/* + * This code was developed for the Quatech USB line for linux, it used + * much of the code developed by Greg Kroah-Hartman for USB serial devices + * + */ + +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/wait.h> +#include <linux/types.h> +#include <linux/version.h> +#include <linux/uaccess.h> + +/* Use our own dbg macro */ +/* #define DEBUG_ON */ +/* #undef dbg */ +#ifdef DEBUG_ON +#define mydbg(const...) printk(const) +#else +#define mydbg(const...) +#endif + +/* parity check flag */ +#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) + +#define SERIAL_TTY_MAJOR 0 /* Nice legal number now */ +#define SERIAL_TTY_MINORS 255 /* loads of devices :) */ +#define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */ +#define PREFUFF_LEVEL_CONSERVATIVE 128 +#define ATC_DISABLED 0x00 + +#define RR_BITS 0x03 /* for clearing clock bits */ +#define DUPMODE_BITS 0xc0 + +#define RS232_MODE 0x00 +#define RTSCTS_TO_CONNECTOR 0x40 +#define CLKS_X4 0x02 + +#define LOOPMODE_BITS 0x41 /* LOOP1 = b6, LOOP0 = b0 (PORT B) */ +#define ALL_LOOPBACK 0x01 +#define MODEM_CTRL 0x40 + +#define THISCHAR data[i] +#define NEXTCHAR data[i + 1] +#define THIRDCHAR data[i + 2] +#define FOURTHCHAR data[i + 3] + +/* + * Useful defintions for port A, Port B and Port C + */ +#define FULLPWRBIT 0x00000080 +#define NEXT_BOARD_POWER_BIT 0x00000004 + +#define SERIAL_LSR_OE 0x02 +#define SERIAL_LSR_PE 0x04 +#define SERIAL_LSR_FE 0x08 +#define SERIAL_LSR_BI 0x10 + +#define SERIAL_LSR_TEMT 0x40 + +#define DIV_LATCH_LS 0x00 +#define XMT_HOLD_REGISTER 0x00 +#define XVR_BUFFER_REGISTER 0x00 +#define DIV_LATCH_MS 0x01 +#define FIFO_CONTROL_REGISTER 0x02 +#define LINE_CONTROL_REGISTER 0x03 +#define MODEM_CONTROL_REGISTER 0x04 +#define LINE_STATUS_REGISTER 0x05 +#define MODEM_STATUS_REGISTER 0x06 + +#define SERIAL_MCR_DTR 0x01 +#define SERIAL_MCR_RTS 0x02 +#define SERIAL_MCR_LOOP 0x10 + +#define SERIAL_MSR_CTS 0x10 +#define SERIAL_MSR_CD 0x80 +#define SERIAL_MSR_RI 0x40 +#define SERIAL_MSR_DSR 0x20 +#define SERIAL_MSR_MASK 0xf0 + +#define SERIAL_8_DATA 0x03 +#define SERIAL_7_DATA 0x02 +#define SERIAL_6_DATA 0x01 +#define SERIAL_5_DATA 0x00 + +#define SERIAL_ODD_PARITY 0X08 +#define SERIAL_EVEN_PARITY 0X18 +#define SERIAL_TWO_STOPB 0x04 +#define SERIAL_ONE_STOPB 0x00 + +#define MAX_BAUD_RATE 460800 +#define MAX_BAUD_REMAINDER 4608 + +#define QT_SET_GET_DEVICE 0xc2 +#define QT_OPEN_CLOSE_CHANNEL 0xca +#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc +#define QT_SET_ATF 0xcd +#define QT_GET_SET_REGISTER 0xc0 +#define QT_GET_SET_UART 0xc1 +#define QT_HW_FLOW_CONTROL_MASK 0xc5 +#define QT_SW_FLOW_CONTROL_MASK 0xc6 +#define QT_SW_FLOW_CONTROL_DISABLE 0xc7 +#define QT_BREAK_CONTROL 0xc8 + +#define SERIALQT_PCI_IOC_MAGIC 'k' +#define SERIALQT_WRITE_QOPR _IOW(SERIALQT_PCI_IOC_MAGIC, 0, int) +#define SERIALQT_WRITE_QMCR _IOW(SERIALQT_PCI_IOC_MAGIC, 1, int) +#define SERIALQT_GET_NUMOF_UNITS _IOR(SERIALQT_PCI_IOC_MAGIC, 2, void *) +#define SERIALQT_GET_THIS_UNIT _IOR(SERIALQT_PCI_IOC_MAGIC, 3, void *) +#define SERIALQT_READ_QOPR _IOR(SERIALQT_PCI_IOC_MAGIC, 4, int) +#define SERIALQT_READ_QMCR _IOR(SERIALQT_PCI_IOC_MAGIC, 5, int) +#define SERIALQT_IS422_EXTENDED _IOR(SERIALQT_PCI_IOC_MAGIC, 6, int) /* returns successful if 422 extended */ + +#define USBD_TRANSFER_DIRECTION_IN 0xc0 +#define USBD_TRANSFER_DIRECTION_OUT 0x40 + +#define ATC_DISABLED 0x00 +#define ATC_RTS_ENABLED 0x02 +#define ATC_DTR_ENABLED 0x01 + +#define RR_BITS 0x03 /* for clearing clock bits */ +#define DUPMODE_BITS 0xc0 + +#define FULL_DUPLEX 0x00 +#define HALF_DUPLEX_RTS 0x40 +#define HALF_DUPLEX_DTR 0x80 + +#define QMCR_FULL_DUPLEX 0x00 +#define QMCR_HALF_DUPLEX_RTS 0x02 +#define QMCR_HALF_DUPLEX_DTR 0x01 +#define QMCR_HALF_DUPLEX_MASK 0x03 +#define QMCR_CONNECTOR_MASK 0x1C + +#define QMCR_RX_EN_MASK 0x20 + +#define QMCR_ALL_LOOPBACK 0x10 +#define QMCR_MODEM_CONTROL 0X00 + +#define SERIALQT_IOC_MAXNR 6 + +struct usb_serial_port { + struct usb_serial *serial; /* pointer back to the owner of this port */ + struct tty_struct *tty; /* the coresponding tty for this port */ + unsigned char number; + char active; /* someone has this device open */ + + unsigned char *interrupt_in_buffer; + struct urb *interrupt_in_urb; + __u8 interrupt_in_endpointAddress; + + unsigned char *bulk_in_buffer; + unsigned char *xfer_to_tty_buffer; + struct urb *read_urb; + __u8 bulk_in_endpointAddress; + + unsigned char *bulk_out_buffer; + int bulk_out_size; + struct urb *write_urb; + __u8 bulk_out_endpointAddress; + + wait_queue_head_t write_wait; + wait_queue_head_t wait; + struct work_struct work; + + int open_count; /* number of times this port has been opened */ + struct semaphore sem; /* locks this structure */ + + __u8 shadowLCR; /* last LCR value received */ + __u8 shadowMCR; /* last MCR value received */ + __u8 shadowMSR; /* last MSR value received */ + __u8 shadowLSR; /* last LSR value received */ + int RxHolding; + char closePending; + int ReadBulkStopped; + + void *private; /* data private to the specific port */ +}; + +struct identity { + int index; + int n_identity; +}; + +struct usb_serial { + struct usb_device *dev; + struct usb_interface *interface; /* the interface for this device */ + struct tty_driver *tty_driver; /* the tty_driver for this device */ + unsigned char minor; /* the starting minor number for this device */ + unsigned char num_ports; /* the number of ports this device has */ + char num_interrupt_in; /* number of interrupt in endpoints we have */ + char num_bulk_in; /* number of bulk in endpoints we have */ + char num_bulk_out; /* number of bulk out endpoints we have */ + unsigned char num_OpenCount; /* the number of ports this device has */ + + __u16 vendor; /* vendor id of this device */ + __u16 product; /* product id of this device */ + struct usb_serial_port port[MAX_NUM_PORTS]; + + void *private; /* data private to the specific driver */ +}; + +static inline int port_paranoia_check(struct usb_serial_port *port, + const char *function) +{ + if (!port) { + dbg("%s - port == NULL", function); + return -1; + } + if (!port->serial) { + dbg("%s - port->serial == NULL\n", function); + return -1; + } + if (!port->tty) { + dbg("%s - port->tty == NULL\n", function); + return -1; + } + + return 0; +} + +/* Inline functions to check the sanity of a pointer that is passed to us */ +static inline int serial_paranoia_check(struct usb_serial *serial, + const char *function) +{ + if (!serial) { + dbg("%s - serial == NULL\n", function); + return -1; + } + + return 0; +} + +static inline struct usb_serial *get_usb_serial(struct usb_serial_port *port, + const char *function) +{ + /* if no port was specified, or it fails a paranoia check */ + if (!port || + port_paranoia_check(port, function) || + serial_paranoia_check(port->serial, function)) { + /* then say that we dont have a valid usb_serial thing, which will + * end up genrating -ENODEV return values */ + return NULL; + } + + return port->serial; +} + +struct qt_get_device_data { + __u8 porta; + __u8 portb; + __u8 portc; +}; + +struct qt_open_channel_data { + __u8 line_status; + __u8 modem_status; +}; + +static void ProcessLineStatus(struct usb_serial_port *port, + unsigned char line_status); +static void ProcessModemStatus(struct usb_serial_port *port, + unsigned char modem_status); +static void ProcessRxChar(struct usb_serial_port *port, unsigned char Data); +static struct usb_serial *get_free_serial(int num_ports, int *minor); + +static int serqt_probe(struct usb_interface *interface, + const struct usb_device_id *id); + +static void serqt_usb_disconnect(struct usb_interface *interface); +static int box_set_device(struct usb_serial *serial, + struct qt_get_device_data *pDeviceData); +static int box_get_device(struct usb_serial *serial, + struct qt_get_device_data *pDeviceData); +static int serial_open(struct tty_struct *tty, struct file *filp); +static void serial_close(struct tty_struct *tty, struct file *filp); +static int serial_write_room(struct tty_struct *tty); +static int serial_ioctl(struct tty_struct *tty, struct file *file, + unsigned int cmd, unsigned long arg); +static void serial_set_termios(struct tty_struct *tty, struct ktermios *old); +static int serial_write(struct tty_struct *tty, const unsigned char *buf, + int count); + +static void serial_throttle(struct tty_struct *tty); +static void serial_unthrottle(struct tty_struct *tty); +static int serial_break(struct tty_struct *tty, int break_state); +static int serial_chars_in_buffer(struct tty_struct *tty); + +static int qt_open(struct usb_serial_port *port, struct file *filp); +static int BoxSetPrebufferLevel(struct usb_serial *serial); + +static int BoxSetATC(struct usb_serial *serial, __u16 n_Mode); +static int BoxSetUart(struct usb_serial *serial, unsigned short Uart_Number, + unsigned short default_divisor, + unsigned char default_LCR); + +static int BoxOPenCloseChannel(struct usb_serial *serial, __u16 Uart_Number, + __u16 OpenClose, + struct qt_open_channel_data *pDeviceData); +static void qt_close(struct usb_serial_port *port, struct file *filp); +static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number, + unsigned short Register_Num, __u8 *pValue); +static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number, + unsigned short Register_Num, unsigned short Value); +static void qt_write_bulk_callback(struct urb *urb); +static int qt_write(struct usb_serial_port *port, int from_user, + const unsigned char *buf, int count); +static void port_softint(struct work_struct *work); +static int qt_write_room(struct usb_serial_port *port); +static int qt_chars_in_buffer(struct usb_serial_port *port); +static int qt_ioctl(struct usb_serial_port *port, struct file *file, + unsigned int cmd, unsigned long arg); +static void qt_set_termios(struct usb_serial_port *port, + struct ktermios *old_termios); +static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int UartNumber, + int bSet); +static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 UartNumber); +static int EmulateWriteQMCR_Reg(int index, unsigned uc_value); +static int EmulateReadQMCR_Reg(int index, unsigned *uc_value); +static struct usb_serial *find_the_box(unsigned int index); +static int ioctl_serial_usb(struct inode *innod, struct file *filp, unsigned int cmd, + unsigned long arg); + +static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 Uart, + unsigned char stop_char, unsigned char start_char); +static void qt_read_bulk_callback(struct urb *urb); + +static void port_sofrint(void *private); + +static void return_serial(struct usb_serial *serial); + +static int serial_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear); +static int serial_tiocmget(struct tty_struct *tty, struct file *file); + +static int qt_tiocmset(struct usb_serial_port *port, struct file *file, + unsigned int value); + +static int qt_tiocmget(struct usb_serial_port *port, struct file *file); + +/* Version Information */ +#define DRIVER_VERSION "v2.14" +#define DRIVER_AUTHOR "Tim Gobeli, Quatech, Inc" +#define DRIVER_DESC "Quatech USB to Serial Driver" + +#define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */ +#define DEVICE_ID_QUATECH_RS232_SINGLE_PORT 0xC020 /* SSU100 */ +#define DEVICE_ID_QUATECH_RS422_SINGLE_PORT 0xC030 /* SSU200 */ +#define DEVICE_ID_QUATECH_RS232_DUAL_PORT 0xC040 /* DSU100 */ +#define DEVICE_ID_QUATECH_RS422_DUAL_PORT 0xC050 /* DSU200 */ +#define DEVICE_ID_QUATECH_RS232_FOUR_PORT 0xC060 /* QSU100 */ +#define DEVICE_ID_QUATECH_RS422_FOUR_PORT 0xC070 /* QSU200 */ +#define DEVICE_ID_QUATECH_RS232_EIGHT_PORT_A 0xC080 /* ESU100A */ +#define DEVICE_ID_QUATECH_RS232_EIGHT_PORT_B 0xC081 /* ESU100B */ +#define DEVICE_ID_QUATECH_RS422_EIGHT_PORT_A 0xC0A0 /* ESU200A */ +#define DEVICE_ID_QUATECH_RS422_EIGHT_PORT_B 0xC0A1 /* ESU200B */ +#define DEVICE_ID_QUATECH_RS232_16_PORT_A 0xC090 /* HSU100A */ +#define DEVICE_ID_QUATECH_RS232_16_PORT_B 0xC091 /* HSU100B */ +#define DEVICE_ID_QUATECH_RS232_16_PORT_C 0xC092 /* HSU100C */ +#define DEVICE_ID_QUATECH_RS232_16_PORT_D 0xC093 /* HSU100D */ +#define DEVICE_ID_QUATECH_RS422_16_PORT_A 0xC0B0 /* HSU200A */ +#define DEVICE_ID_QUATECH_RS422_16_PORT_B 0xC0B1 /* HSU200B */ +#define DEVICE_ID_QUATECH_RS422_16_PORT_C 0xC0B2 /* HSU200C */ +#define DEVICE_ID_QUATECH_RS422_16_PORT_D 0xC0B3 /* HSU200D */ + +/* table of Quatech devices */ +static struct usb_device_id serqt_table[] = { + {USB_DEVICE + (USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_SINGLE_PORT)}, + {USB_DEVICE + (USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_SINGLE_PORT)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_DUAL_PORT)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_DUAL_PORT)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_FOUR_PORT)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_FOUR_PORT)}, + {USB_DEVICE + (USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_EIGHT_PORT_A)}, + {USB_DEVICE + (USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_EIGHT_PORT_B)}, + {USB_DEVICE + (USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_EIGHT_PORT_A)}, + {USB_DEVICE + (USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_EIGHT_PORT_B)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_16_PORT_A)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_16_PORT_B)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_16_PORT_C)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS232_16_PORT_D)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_16_PORT_A)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_16_PORT_B)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_16_PORT_C)}, + {USB_DEVICE(USB_VENDOR_ID_QUATECH, DEVICE_ID_QUATECH_RS422_16_PORT_D)}, + {} /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(usb, serqt_table); + +static int major_number; +static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */ + +/* table of Quatech 422devices */ +static unsigned int serqt_422_table[] = { + DEVICE_ID_QUATECH_RS422_SINGLE_PORT, + DEVICE_ID_QUATECH_RS422_DUAL_PORT, + DEVICE_ID_QUATECH_RS422_FOUR_PORT, + DEVICE_ID_QUATECH_RS422_EIGHT_PORT_A, + DEVICE_ID_QUATECH_RS422_EIGHT_PORT_B, + DEVICE_ID_QUATECH_RS422_16_PORT_A, + DEVICE_ID_QUATECH_RS422_16_PORT_B, + DEVICE_ID_QUATECH_RS422_16_PORT_C, + DEVICE_ID_QUATECH_RS422_16_PORT_D, + 0 /* terminate with zero */ +}; + +/* usb specific object needed to register this driver with the usb subsystem */ +static struct usb_driver serqt_usb_driver = { + .name = "quatech-usb-serial", + .probe = serqt_probe, + .disconnect = serqt_usb_disconnect, + .id_table = serqt_table, +}; + +static struct ktermios *serial_termios[SERIAL_TTY_MINORS]; +static struct ktermios *serial_termios_locked[SERIAL_TTY_MINORS]; + +static const struct tty_operations serial_ops = { + .open = serial_open, + .close = serial_close, + .write = serial_write, + .write_room = serial_write_room, + .ioctl = serial_ioctl, + .set_termios = serial_set_termios, + .throttle = serial_throttle, + .unthrottle = serial_unthrottle, + .break_ctl = serial_break, + .chars_in_buffer = serial_chars_in_buffer, + .tiocmset = serial_tiocmset, + .tiocmget = serial_tiocmget, +}; + +static struct tty_driver serial_tty_driver = { + .magic = TTY_DRIVER_MAGIC, + .driver_name = "Quatech usb-serial", + .name = "ttyQT_USB", + .major = SERIAL_TTY_MAJOR, + .minor_start = 0, + .num = SERIAL_TTY_MINORS, + .type = TTY_DRIVER_TYPE_SERIAL, + .subtype = SERIAL_TYPE_NORMAL, + .flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV, + + .termios = serial_termios, + .termios_locked = serial_termios_locked, + .init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL, + + .init_termios.c_iflag = ICRNL | IXON, + .init_termios.c_oflag = OPOST, + + .init_termios.c_lflag = + ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN, +}; + +/* fops for parent device */ +static const struct file_operations serialqt_usb_fops = { + .ioctl = ioctl_serial_usb, +}; + + /** + * serqt_probe + * + * Called by the usb core when a new device is connected that it thinks + * this driver might be interested in. + * + */ +static int serqt_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev(interface); + struct usb_serial *serial = NULL; + struct usb_serial_port *port; + struct usb_endpoint_descriptor *endpoint; + struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; + struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; + struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; + int minor; + int buffer_size; + int i; + struct usb_host_interface *iface_desc; + int num_interrupt_in = 0; + int num_bulk_in = 0; + int num_bulk_out = 0; + int num_ports; + struct qt_get_device_data DeviceData; + int status; + + mydbg("In %s\n", __func__); + + /* let's find the endpoints needed */ + /* check out the endpoints */ + iface_desc = interface->cur_altsetting;; + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + + if ((endpoint->bEndpointAddress & 0x80) && + ((endpoint->bmAttributes & 3) == 0x02)) { + /* we found a bulk in endpoint */ + mydbg("found bulk in"); + bulk_in_endpoint[num_bulk_in] = endpoint; + ++num_bulk_in; + } + + if (((endpoint->bEndpointAddress & 0x80) == 0x00) && + ((endpoint->bmAttributes & 3) == 0x02)) { + /* we found a bulk out endpoint */ + mydbg("found bulk out\n"); + bulk_out_endpoint[num_bulk_out] = endpoint; + ++num_bulk_out; + } + + if ((endpoint->bEndpointAddress & 0x80) && + ((endpoint->bmAttributes & 3) == 0x03)) { + /* we found a interrupt in endpoint */ + mydbg("found interrupt in\n"); + interrupt_in_endpoint[num_interrupt_in] = endpoint; + ++num_interrupt_in; + } + } + + /* found all that we need */ + dev_info(&interface->dev, "Quatech converter detected\n"); + num_ports = num_bulk_out; + if (num_ports == 0) { + err("Quatech device with no bulk out, not allowed."); + return -ENODEV; + + } + + serial = get_free_serial(num_ports, &minor); + if (serial == NULL) { + err("No more free serial devices"); + return -ENODEV; + } + + serial->dev = dev; + serial->interface = interface; + serial->minor = minor; + serial->num_ports = num_ports; + serial->num_bulk_in = num_bulk_in; + serial->num_bulk_out = num_bulk_out; + serial->num_interrupt_in = num_interrupt_in; + serial->vendor = dev->descriptor.idVendor; + serial->product = dev->descriptor.idProduct; + + /* set up the endpoint information */ + for (i = 0; i < num_bulk_in; ++i) { + endpoint = bulk_in_endpoint[i]; + port = &serial->port[i]; + port->read_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!port->read_urb) { + err("No free urbs available"); + goto probe_error; + } + buffer_size = endpoint->wMaxPacketSize; + port->bulk_in_endpointAddress = endpoint->bEndpointAddress; + port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); + port->xfer_to_tty_buffer = kmalloc(buffer_size, GFP_KERNEL); + if (!port->bulk_in_buffer) { + err("Couldn't allocate bulk_in_buffer"); + goto probe_error; + } + usb_fill_bulk_urb(port->read_urb, dev, + usb_rcvbulkpipe(dev, + endpoint->bEndpointAddress), + port->bulk_in_buffer, buffer_size, + qt_read_bulk_callback, port); + } + + for (i = 0; i < num_bulk_out; ++i) { + endpoint = bulk_out_endpoint[i]; + port = &serial->port[i]; + port->write_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!port->write_urb) { + err("No free urbs available"); + goto probe_error; + } + buffer_size = endpoint->wMaxPacketSize; + port->bulk_out_size = buffer_size; + port->bulk_out_endpointAddress = endpoint->bEndpointAddress; + port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); + if (!port->bulk_out_buffer) { + err("Couldn't allocate bulk_out_buffer"); + goto probe_error; + } + usb_fill_bulk_urb(port->write_urb, dev, + usb_sndbulkpipe(dev, + endpoint->bEndpointAddress), + port->bulk_out_buffer, buffer_size, + qt_write_bulk_callback, port); + + } + + /* For us numb of bulkin or out = number of ports */ + mydbg("%s - setting up %d port structures for this device\n", + __func__, num_bulk_in); + for (i = 0; i < num_bulk_in; ++i) { + port = &serial->port[i]; + port->number = i + serial->minor; + port->serial = serial; + + INIT_WORK(&port->work, port_softint); + + init_MUTEX(&port->sem); + + } + status = box_get_device(serial, &DeviceData); + if (status < 0) { + mydbg(__FILE__ "box_get_device failed"); + goto probe_error; + } + + mydbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb); + + DeviceData.portb &= ~FULLPWRBIT; + mydbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb); + + status = box_set_device(serial, &DeviceData); + if (status < 0) { + mydbg(__FILE__ "box_set_device failed\n"); + goto probe_error; + } + + /* initialize the devfs nodes for this device and let the user know what ports we are bound to */ + for (i = 0; i < serial->num_ports; ++i) { + dev_info(&interface->dev, + "Converter now attached to ttyUSB%d (or usb/tts/%d for devfs)", + serial->port[i].number, serial->port[i].number); + } + + /* usb_serial_console_init (debug, minor); */ + + /***********TAG add start next board here ****/ + status = box_get_device(serial, &DeviceData); + if (status < 0) { + mydbg(__FILE__ "box_get_device failed"); + goto probe_error; + } + /* + * and before we power up lets initialiaze parnent device stuff here before + * we set thmem via any other method such as the property pages + */ + switch (serial->product) { + case DEVICE_ID_QUATECH_RS232_SINGLE_PORT: + case DEVICE_ID_QUATECH_RS232_DUAL_PORT: + case DEVICE_ID_QUATECH_RS232_FOUR_PORT: + case DEVICE_ID_QUATECH_RS232_EIGHT_PORT_A: + case DEVICE_ID_QUATECH_RS232_EIGHT_PORT_B: + case DEVICE_ID_QUATECH_RS232_16_PORT_A: + case DEVICE_ID_QUATECH_RS232_16_PORT_B: + case DEVICE_ID_QUATECH_RS232_16_PORT_C: + case DEVICE_ID_QUATECH_RS232_16_PORT_D: + DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS); + DeviceData.porta |= CLKS_X4; + DeviceData.portb &= ~(LOOPMODE_BITS); + DeviceData.portb |= RS232_MODE; + break; + + case DEVICE_ID_QUATECH_RS422_SINGLE_PORT: + case DEVICE_ID_QUATECH_RS422_DUAL_PORT: + case DEVICE_ID_QUATECH_RS422_FOUR_PORT: + case DEVICE_ID_QUATECH_RS422_EIGHT_PORT_A: + case DEVICE_ID_QUATECH_RS422_EIGHT_PORT_B: + case DEVICE_ID_QUATECH_RS422_16_PORT_A: + case DEVICE_ID_QUATECH_RS422_16_PORT_B: + case DEVICE_ID_QUATECH_RS422_16_PORT_C: + case DEVICE_ID_QUATECH_RS422_16_PORT_D: + DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS); + DeviceData.porta |= CLKS_X4; + DeviceData.portb &= ~(LOOPMODE_BITS); + DeviceData.portb |= ALL_LOOPBACK; + break; + default: + DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS); + DeviceData.porta |= CLKS_X4; + DeviceData.portb &= ~(LOOPMODE_BITS); + DeviceData.portb |= RS232_MODE; + break; + + } + status = BoxSetPrebufferLevel(serial); /* sets to default vaue */ + if (status < 0) { + mydbg(__FILE__ "BoxSetPrebufferLevel failed\n"); + goto probe_error; + } + + status = BoxSetATC(serial, ATC_DISABLED); + if (status < 0) { + mydbg(__FILE__ "BoxSetATC failed\n"); + goto probe_error; + } + /**********************************************************/ + mydbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb); + + DeviceData.portb |= NEXT_BOARD_POWER_BIT; + mydbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb); + + status = box_set_device(serial, &DeviceData); + if (status < 0) { + mydbg(__FILE__ "box_set_device failed\n"); + goto probe_error; + } + + mydbg("Exit Success %s\n", __func__); + + usb_set_intfdata(interface, serial); + return 0; + +probe_error: + + for (i = 0; i < num_bulk_in; ++i) { + port = &serial->port[i]; + usb_free_urb(port->read_urb); + kfree(port->bulk_in_buffer); + } + for (i = 0; i < num_bulk_out; ++i) { + port = &serial->port[i]; + usb_free_urb(port->write_urb); + kfree(port->bulk_out_buffer); + kfree(port->xfer_to_tty_buffer); + } + for (i = 0; i < num_interrupt_in; ++i) { + port = &serial->port[i]; + usb_free_urb(port->interrupt_in_urb); + kfree(port->interrupt_in_buffer); + } + + /* return the minor range that this device had */ + return_serial(serial); + mydbg("Exit fail %s\n", __func__); + + /* free up any memory that we allocated */ + kfree(serial); + return -EIO; +} + +/* + * returns the serial_table array pointers that are taken + * up in consecutive positions for each port to a common usb_serial structure + * back to NULL + */ +static void return_serial(struct usb_serial *serial) +{ + int i; + + mydbg("%s\n", __func__); + + if (serial == NULL) + return; + + for (i = 0; i < serial->num_ports; ++i) + serial_table[serial->minor + i] = NULL; + + return; +} + +/* + * Finds the first locatio int the serial_table array where it can fit + * num_ports number of consecutive points to a common usb_serial + * structure,allocates a stucture points to it in all the structures, and + * returns the index to the first location in the array in the "minor" + * variable. + */ +static struct usb_serial *get_free_serial(int num_ports, int *minor) +{ + struct usb_serial *serial = NULL; + int i, j; + int good_spot; + + mydbg("%s %d\n", __func__, num_ports); + + *minor = 0; + for (i = 0; i < SERIAL_TTY_MINORS; ++i) { + if (serial_table[i]) + continue; + + good_spot = 1; + /* + * find a spot in the array where you can fit consecutive + * positions to put the pointers to the usb_serail allocated + * structure for all the minor numbers (ie. ports) + */ + for (j = 1; j <= num_ports - 1; ++j) + if (serial_table[i + j]) + good_spot = 0; + if (good_spot == 0) + continue; + + serial = kmalloc(sizeof(struct usb_serial), GFP_KERNEL); + if (!serial) { + err("%s - Out of memory", __func__); + return NULL; + } + memset(serial, 0, sizeof(struct usb_serial)); + serial_table[i] = serial; + *minor = i; + mydbg("%s - minor base = %d\n", __func__, *minor); + + /* + * copy in the pointer into the array starting a the *minor + * position minor is the index into the array. + */ + for (i = *minor + 1; + (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) + serial_table[i] = serial; + return serial; + } + return NULL; +} + +static int flip_that(struct tty_struct *tty, __u16 UartNumber, + struct usb_serial *serial) +{ + tty_flip_buffer_push(tty); + tty_schedule_flip(tty); + return 0; +} + +/* Handles processing and moving data to the tty layer */ +static void port_sofrint(void *private) +{ + struct usb_serial_port *port = (struct usb_serial_port *)private; + struct usb_serial *serial = get_usb_serial(port, __func__); + struct tty_struct *tty = port->tty; + unsigned char *data = port->read_urb->transfer_buffer; + unsigned int UartNumber; + struct urb *urb = port->read_urb; + unsigned int RxCount = urb->actual_length; + int i, result; + int flag, flag_data; + + /* UartNumber = MINOR(port->tty->device) - serial->minor; */ + UartNumber = tty->index - serial->minor; + + mydbg("%s - port %d\n", __func__, port->number); + mydbg("%s - port->RxHolding = %d\n", __func__, port->RxHolding); + + if (port_paranoia_check(port, __func__) != 0) { + mydbg("%s - port_paranoia_check, exiting\n", __func__); + port->ReadBulkStopped = 1; + return; + } + + if (!serial) { + mydbg("%s - bad serial pointer, exiting\n", __func__); + return; + } + if (port->closePending == 1) { + /* Were closing , stop reading */ + mydbg("%s - (port->closepending == 1\n", __func__); + port->ReadBulkStopped = 1; + return; + } + + /* + * RxHolding is asserted by throttle, if we assert it, we're not + * receiving any more characters and let the box handle the flow + * control + */ + if (port->RxHolding == 1) { + port->ReadBulkStopped = 1; + return; + } + + if (urb->status) { + port->ReadBulkStopped = 1; + + mydbg("%s - nonzero read bulk status received: %d\n", + __func__, urb->status); + return; + } + + tty = port->tty; + mydbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty); + + if (tty && RxCount) { + flag_data = 0; + for (i = 0; i < RxCount; ++i) { + /* Look ahead code here */ + if ((i <= (RxCount - 3)) && (THISCHAR == 0x1b) + && (NEXTCHAR == 0x1b)) { + flag = 0; + switch (THIRDCHAR) { + case 0x00: + /* Line status change 4th byte must follow */ + if (i > (RxCount - 4)) { + mydbg("Illegal escape sequences in received data\n"); + break; + } + ProcessLineStatus(port, FOURTHCHAR); + i += 3; + flag = 1; + break; + + case 0x01: + /* Modem status status change 4th byte must follow */ + mydbg("Modem status status. \n"); + if (i > (RxCount - 4)) { + mydbg + ("Illegal escape sequences in received data\n"); + break; + } + ProcessModemStatus(port, FOURTHCHAR); + i += 3; + flag = 1; + break; + case 0xff: + mydbg("No status sequence. \n"); + + ProcessRxChar(port, THISCHAR); + ProcessRxChar(port, NEXTCHAR); + i += 2; + break; + } + if (flag == 1) + continue; + } + + if (tty && urb->actual_length) { + tty_buffer_request_room(tty, 1); + tty_insert_flip_string(tty, (data + i), 1); + } + + } + tty_flip_buffer_push(tty); + } + + /* Continue trying to always read */ + usb_fill_bulk_urb(port->read_urb, serial->dev, + usb_rcvbulkpipe(serial->dev, + port->bulk_in_endpointAddress), + port->read_urb->transfer_buffer, + port->read_urb->transfer_buffer_length, + qt_read_bulk_callback, port); + result = usb_submit_urb(port->read_urb, GFP_ATOMIC); + if (result) + mydbg("%s - failed resubmitting read urb, error %d", + __func__, result); + else { + if (tty && RxCount) + flip_that(tty, UartNumber, serial); + } + + return; + +} + +static void qt_read_bulk_callback(struct urb *urb) +{ + + struct usb_serial_port *port = (struct usb_serial_port *)urb->context; + + if (urb->status) { + port->ReadBulkStopped = 1; + mydbg("%s - nonzero write bulk status received: %d\n", + __func__, urb->status); + return; + } + + port_sofrint((void *)port); + schedule_work(&port->work); +} + +static void ProcessRxChar(struct usb_serial_port *port, unsigned char Data) +{ + struct tty_struct *tty; + struct urb *urb = port->read_urb; + tty = port->tty; + /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */ + + if (tty && urb->actual_length) { + tty_buffer_request_room(tty, 1); + tty_insert_flip_string(tty, &Data, 1); + /* tty_flip_buffer_push(tty); */ + } + + return; +} + +static void ProcessLineStatus(struct usb_serial_port *port, + unsigned char line_status) +{ + + port->shadowLSR = + line_status & (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | + SERIAL_LSR_BI); + return; +} + +static void ProcessModemStatus(struct usb_serial_port *port, + unsigned char modem_status) +{ + + port->shadowMSR = modem_status; + wake_up_interruptible(&port->wait); + return; +} + +static void serqt_usb_disconnect(struct usb_interface *interface) +{ + struct usb_serial *serial = usb_get_intfdata(interface); + /* struct device *dev = &interface->dev; */ + struct usb_serial_port *port; + int i; + + mydbg("%s\n", __func__); + if (serial) { + + serial->dev = NULL; + + for (i = 0; i < serial->num_ports; ++i) + serial->port[i].open_count = 0; + + for (i = 0; i < serial->num_bulk_in; ++i) { + port = &serial->port[i]; + usb_unlink_urb(port->read_urb); + usb_free_urb(port->read_urb); + kfree(port->bulk_in_buffer); + } + for (i = 0; i < serial->num_bulk_out; ++i) { + port = &serial->port[i]; + usb_unlink_urb(port->write_urb); + usb_free_urb(port->write_urb); + kfree(port->bulk_out_buffer); + } + for (i = 0; i < serial->num_interrupt_in; ++i) { + port = &serial->port[i]; + usb_unlink_urb(port->interrupt_in_urb); + usb_free_urb(port->interrupt_in_urb); + kfree(port->interrupt_in_buffer); + } + + /* return the minor range that this device had */ + return_serial(serial); + + /* free up any memory that we allocated */ + kfree(serial); + + } else { + dev_info(&interface->dev, "device disconnected"); + } + +} + +static struct usb_serial *get_serial_by_minor(unsigned int minor) +{ + return serial_table[minor]; +} + +/***************************************************************************** + * Driver tty interface functions + *****************************************************************************/ +static int serial_open(struct tty_struct *tty, struct file *filp) +{ + struct usb_serial *serial; + struct usb_serial_port *port; + unsigned int portNumber; + int retval = 0; + + mydbg("%s\n", __func__); + + /* initialize the pointer incase something fails */ + tty->driver_data = NULL; + + /* get the serial object associated with this tty pointer */ + /* serial = get_serial_by_minor (MINOR(tty->device)); */ + + /* get the serial object associated with this tty pointer */ + serial = get_serial_by_minor(tty->index); + + if (serial_paranoia_check(serial, __func__)) + return -ENODEV; + + /* set up our port structure making the tty driver remember our port object, and us it */ + portNumber = tty->index - serial->minor; + port = &serial->port[portNumber]; + tty->driver_data = port; + + down(&port->sem); + port->tty = tty; + + ++port->open_count; + if (port->open_count == 1) { + port->closePending = 0; + mydbg("%s port->closepending = 0\n", __func__); + + port->RxHolding = 0; + mydbg("%s port->RxHolding = 0\n", __func__); + + retval = qt_open(port, filp); + } + + if (retval) + port->open_count = 0; + mydbg("%s returning port->closePending = %d\n", __func__, + port->closePending); + + up(&port->sem); + return retval; +} + +/***************************************************************************** + *device's specific driver functions + *****************************************************************************/ +static int qt_open(struct usb_serial_port *port, struct file *filp) +{ + struct usb_serial *serial = port->serial; + int result = 0; + unsigned int UartNumber; + struct qt_get_device_data DeviceData; + struct qt_open_channel_data ChannelData; + unsigned short default_divisor = 0x30; /* gives 9600 baud rate */ + unsigned char default_LCR = SERIAL_8_DATA; /* 8, none , 1 */ + int status = 0; + + if (port_paranoia_check(port, __func__)) + return -ENODEV; + + mydbg("%s - port %d\n", __func__, port->number); + + /* force low_latency on so that our tty_push actually forces the data through, + otherwise it is scheduled, and with high data rates (like with OHCI) data + can get lost. */ + if (port->tty) + port->tty->low_latency = 0; + + UartNumber = port->tty->index - serial->minor; + + status = box_get_device(serial, &DeviceData); + if (status < 0) { + mydbg(__FILE__ "box_get_device failed\n"); + return status; + } + serial->num_OpenCount++; + mydbg("%s serial->num_OpenCount = %d\n", __func__, + serial->num_OpenCount); + /* Open uart channel */ + + /* Port specific setups */ + status = BoxOPenCloseChannel(serial, UartNumber, 1, &ChannelData); + if (status < 0) { + mydbg(__FILE__ "BoxOPenCloseChannel failed\n"); + return status; + } + mydbg(__FILE__ "BoxOPenCloseChannel completed.\n"); + + port->shadowLSR = ChannelData.line_status & + (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | SERIAL_LSR_BI); + + port->shadowMSR = ChannelData.modem_status & + (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD); + + /* Set Baud rate to default and turn off (default)flow control here */ + status = BoxSetUart(serial, UartNumber, default_divisor, default_LCR); + if (status < 0) { + mydbg(__FILE__ "BoxSetUart failed\n"); + return status; + } + mydbg(__FILE__ "BoxSetUart completed.\n"); + + /* Put this here to make it responsive to stty and defauls set by the tty layer */ + qt_set_termios(port, NULL); + + /* Initialize the wait que head */ + init_waitqueue_head(&(port->wait)); + + /* if we have a bulk endpoint, start reading from it */ + if (serial->num_bulk_in) { + /* Start reading from the device */ + usb_fill_bulk_urb(port->read_urb, serial->dev, + usb_rcvbulkpipe(serial->dev, + port-> + bulk_in_endpointAddress), + port->read_urb->transfer_buffer, + port->read_urb->transfer_buffer_length, + qt_read_bulk_callback, port); + + port->ReadBulkStopped = 0; + + result = usb_submit_urb(port->read_urb, GFP_ATOMIC); + + if (result) { + err("%s - failed resubmitting read urb, error %d\n", + __func__, result); + port->ReadBulkStopped = 1; + } + + } + + return result; +} + +static void serial_close(struct tty_struct *tty, struct file *filp) +{ + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + + if (!serial) + return; + + down(&port->sem); + + mydbg("%s - port %d\n", __func__, port->number); + + /* if disconnect beat us to the punch here, there's nothing to do */ + if (tty->driver_data) { + if (!port->open_count) { + mydbg("%s - port not opened\n", __func__); + goto exit; + } + + --port->open_count; + if (port->open_count <= 0) { + port->closePending = 1; + mydbg("%s - port->closePending = 1\n", __func__); + + if (serial->dev) { + qt_close(port, filp); + port->open_count = 0; + } + } + + } + +exit: + up(&port->sem); + + mydbg("%s - %d return\n", __func__, port->number); + +} + +static void qt_close(struct usb_serial_port *port, struct file *filp) +{ + unsigned long jift = jiffies + 10 * HZ; + __u8 LSR_Value, MCR_Value; + struct usb_serial *serial = port->serial; + int status; + unsigned int UartNumber; + + struct qt_open_channel_data ChannelData; + status = 0; + LSR_Value = 0; + + mydbg("%s - port %d\n", __func__, port->number); + UartNumber = port->tty->index - serial->minor; + + /* shutdown any bulk reads that might be going on */ + if (serial->num_bulk_out) + usb_unlink_urb(port->write_urb); + if (serial->num_bulk_in) + usb_unlink_urb(port->read_urb); + + /* wait up to 30 seconds for transmitter to empty */ + do { + status = BoxGetRegister(serial, UartNumber, LINE_STATUS_REGISTER, &LSR_Value); + if (status < 0) { + mydbg(__FILE__ "box_get_device failed\n"); + break; + } + + if ((LSR_Value & SERIAL_LSR_TEMT) + && (port->ReadBulkStopped == 1)) + break; + schedule(); + + } + while (jiffies <= jift) + ; + + if (jiffies > jift) + mydbg("%s - port %d timout of checking transmitter empty\n", + __func__, port->number); + else + mydbg("%s - port %d checking transmitter empty succeded\n", + __func__, port->number); + + status = + BoxGetRegister(serial, UartNumber, MODEM_CONTROL_REGISTER, + &MCR_Value); + mydbg(__FILE__ "BoxGetRegister MCR = 0x%x.\n", MCR_Value); + + if (status >= 0) { + MCR_Value &= ~(SERIAL_MCR_DTR | SERIAL_MCR_RTS); + /* status = BoxSetRegister(serial, UartNumber, MODEM_CONTROL_REGISTER, MCR_Value); */ + } + + /* Close uart channel */ + status = BoxOPenCloseChannel(serial, UartNumber, 0, &ChannelData); + if (status < 0) + mydbg("%s - port %d BoxOPenCloseChannel failed.\n", + __func__, port->number); + + serial->num_OpenCount--; + +} + +static int serial_write(struct tty_struct *tty, const unsigned char *buf, + int count) +{ + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial; + int retval = -EINVAL; + unsigned int UartNumber; + int from_user = 0; + + serial = get_usb_serial(port, __func__); + if (serial == NULL) + return -ENODEV; + /* This can happen if we get disconnected a */ + if (port->open_count == 0) + return -ENODEV; + UartNumber = port->tty->index - serial->minor; + + mydbg("%s - port %d, %d byte(s)\n", __func__, port->number, count); + mydbg("%s - port->RxHolding = %d\n", __func__, port->RxHolding); + + if (!port->open_count) { + mydbg("%s - port not opened\n", __func__); + goto exit; + } + + retval = qt_write(port, from_user, buf, count); + +exit: + return retval; +} + +static int qt_write(struct usb_serial_port *port, int from_user, + const unsigned char *buf, int count) +{ + int result; + unsigned int UartNumber; + + struct usb_serial *serial = get_usb_serial(port, __func__); + if (serial == NULL) + return -ENODEV; + + mydbg("%s - port %d\n", __func__, port->number); + + if (count == 0) { + mydbg("%s - write request of 0 bytes\n", __func__); + return 0; + } + + UartNumber = port->tty->index - serial->minor; + /* only do something if we have a bulk out endpoint */ + if (serial->num_bulk_out) { + if (port->write_urb->status == -EINPROGRESS) { + mydbg("%s - already writing\n", __func__); + return 0; + } + + count = + (count > port->bulk_out_size) ? port->bulk_out_size : count; + + if (from_user) { + if (copy_from_user + (port->write_urb->transfer_buffer, buf, count)) + return -EFAULT; + } else { + memcpy(port->write_urb->transfer_buffer, buf, count); + } + + /* usb_serial_debug_data(__FILE__, __func__, count, port->write_urb->transfer_buffer); */ + + /* set up our urb */ + + usb_fill_bulk_urb(port->write_urb, serial->dev, + usb_sndbulkpipe(serial->dev, + port-> + bulk_out_endpointAddress), + port->write_urb->transfer_buffer, count, + qt_write_bulk_callback, port); + + /* send the data out the bulk port */ + result = usb_submit_urb(port->write_urb, GFP_ATOMIC); + if (result) + mydbg("%s - failed submitting write urb, error %d\n", + __func__, result); + else + result = count; + + return result; + } + + /* no bulk out, so return 0 bytes written */ + return 0; +} + +static void qt_write_bulk_callback(struct urb *urb) +{ + struct usb_serial_port *port = (struct usb_serial_port *)urb->context; + struct usb_serial *serial = get_usb_serial(port, __func__); + + mydbg("%s - port %d\n", __func__, port->number); + + if (!serial) { + mydbg("%s - bad serial pointer, exiting\n", __func__); + return; + } + + if (urb->status) { + mydbg("%s - nonzero write bulk status received: %d\n", + __func__, urb->status); + return; + } + port_softint(&port->work); + schedule_work(&port->work); + + return; +} + +static void port_softint(struct work_struct *work) +{ + struct usb_serial_port *port = + container_of(work, struct usb_serial_port, work); + struct usb_serial *serial = get_usb_serial(port, __func__); + struct tty_struct *tty; + + mydbg("%s - port %d\n", __func__, port->number); + + if (!serial) + return; + + tty = port->tty; + if (!tty) + return; +#if 0 + if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) + && tty->ldisc.write_wakeup) { + mydbg("%s - write wakeup call.\n", __func__); + (tty->ldisc.write_wakeup) (tty); + } +#endif + + wake_up_interruptible(&tty->write_wait); +} +static int serial_write_room(struct tty_struct *tty) +{ + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + int retval = -EINVAL; + + if (!serial) + return -ENODEV; + + down(&port->sem); + + mydbg("%s - port %d\n", __func__, port->number); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + + retval = qt_write_room(port); + +exit: + up(&port->sem); + return retval; +} +static int qt_write_room(struct usb_serial_port *port) +{ + struct usb_serial *serial = port->serial; + int room = 0; + if (port->closePending == 1) { + mydbg("%s - port->closePending == 1\n", __func__); + return -ENODEV; + } + + mydbg("%s - port %d\n", __func__, port->number); + + if (serial->num_bulk_out) { + if (port->write_urb->status != -EINPROGRESS) + room = port->bulk_out_size; + } + + mydbg("%s - returns %d\n", __func__, room); + return room; +} +static int serial_chars_in_buffer(struct tty_struct *tty) +{ + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + int retval = -EINVAL; + + if (!serial) + return -ENODEV; + + down(&port->sem); + + mydbg("%s = port %d\n", __func__, port->number); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + + retval = qt_chars_in_buffer(port); + +exit: + up(&port->sem); + return retval; +} + +static int qt_chars_in_buffer(struct usb_serial_port *port) +{ + struct usb_serial *serial = port->serial; + int chars = 0; + + mydbg("%s - port %d\n", __func__, port->number); + + if (serial->num_bulk_out) { + if (port->write_urb->status == -EINPROGRESS) + chars = port->write_urb->transfer_buffer_length; + } + + mydbg("%s - returns %d\n", __func__, chars); + return chars; +} + +static int serial_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + int retval = -ENODEV; + unsigned int UartNumber; + mydbg("In %s \n", __func__); + + if (!serial) + return -ENODEV; + + UartNumber = port->tty->index - serial->minor; + + down(&port->sem); + + mydbg("%s - port %d \n", __func__, port->number); + mydbg("%s - port->RxHolding = %d\n", __func__, port->RxHolding); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + + retval = qt_tiocmset(port, file, set); + +exit: + up(&port->sem); + return retval; +} + +static int qt_tiocmset(struct usb_serial_port *port, struct file *file, + unsigned int value) +{ + + __u8 MCR_Value; + int status; + unsigned int UartNumber; + + struct usb_serial *serial = get_usb_serial(port, __func__); + if (serial == NULL) + return -ENODEV; + + mydbg("%s - port %d\n", __func__, port->number); + + /**************************************************************************************/ + /** TIOCMGET + */ + UartNumber = port->tty->index - serial->minor; + status = + BoxGetRegister(port->serial, UartNumber, MODEM_CONTROL_REGISTER, + &MCR_Value); + if (status < 0) + return -ESPIPE; + + /* + * Turn off the RTS and DTR and loopbcck and then only turn on what was + * asked for + */ + MCR_Value &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP); + if (value & TIOCM_RTS) + MCR_Value |= SERIAL_MCR_RTS; + if (value & TIOCM_DTR) + MCR_Value |= SERIAL_MCR_DTR; + if (value & TIOCM_LOOP) + MCR_Value |= SERIAL_MCR_LOOP; + + status = + BoxSetRegister(port->serial, UartNumber, MODEM_CONTROL_REGISTER, + MCR_Value); + if (status < 0) + return -ESPIPE; + else + return 0; +} + +static int serial_tiocmget(struct tty_struct *tty, struct file *file) +{ + + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + + struct usb_serial *serial = get_usb_serial(port, __func__); + int retval = -ENODEV; + unsigned int UartNumber; + mydbg("In %s \n", __func__); + + if (!serial) + return -ENODEV; + + UartNumber = port->tty->index - serial->minor; + + down(&port->sem); + + mydbg("%s - port %d\n", __func__, port->number); + mydbg("%s - port->RxHolding = %d\n", __func__, port->RxHolding); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + + retval = qt_tiocmget(port, file); + +exit: + up(&port->sem); + return retval; +} + +static int qt_tiocmget(struct usb_serial_port *port, struct file *file) +{ + + __u8 MCR_Value; + __u8 MSR_Value; + unsigned int result = 0; + int status; + unsigned int UartNumber; + struct tty_struct *tty; + + struct usb_serial *serial = get_usb_serial(port, __func__); + if (serial == NULL) + return -ENODEV; + tty = port->tty; + + mydbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty); + + /**************************************************************************************/ + /** TIOCMGET + */ + UartNumber = port->tty->index - serial->minor; + status = + BoxGetRegister(port->serial, UartNumber, MODEM_CONTROL_REGISTER, + &MCR_Value); + if (status >= 0) { + status = + BoxGetRegister(port->serial, UartNumber, + MODEM_STATUS_REGISTER, &MSR_Value); + + } + + if (status >= 0) { + result = ((MCR_Value & SERIAL_MCR_DTR) ? TIOCM_DTR : 0) + /* DTR IS SET */ + | ((MCR_Value & SERIAL_MCR_RTS) ? TIOCM_RTS : 0) + /* RTS IS SET */ + | ((MSR_Value & SERIAL_MSR_CTS) ? TIOCM_CTS : 0) + /* CTS is set */ + | ((MSR_Value & SERIAL_MSR_CD) ? TIOCM_CAR : 0) + /* Carrier detect is set */ + | ((MSR_Value & SERIAL_MSR_RI) ? TIOCM_RI : 0) + /* Ring indicator set */ + | ((MSR_Value & SERIAL_MSR_DSR) ? TIOCM_DSR : 0); + /* DSR is set */ + return result; + + } else + return -ESPIPE; +} + +static int serial_ioctl(struct tty_struct *tty, struct file *file, + unsigned int cmd, unsigned long arg) +{ + + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + int retval = -ENODEV; + unsigned int UartNumber; + mydbg("In %s \n", __func__); + + if (!serial) + return -ENODEV; + + UartNumber = port->tty->index - serial->minor; + + down(&port->sem); + + mydbg("%s - port %d, cmd 0x%.4x\n", __func__, port->number, cmd); + mydbg("%s - port->RxHolding = %d\n", __func__, port->RxHolding); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + + retval = qt_ioctl(port, file, cmd, arg); + +exit: + up(&port->sem); + return retval; +} +static int qt_ioctl(struct usb_serial_port *port, struct file *file, + unsigned int cmd, unsigned long arg) +{ + __u8 MCR_Value; + __u8 MSR_Value; + unsigned short Prev_MSR_Value; + unsigned int value, result = 0; + int status; + unsigned int UartNumber; + struct tty_struct *tty; + + struct usb_serial *serial = get_usb_serial(port, __func__); + if (serial == NULL) + return -ENODEV; + tty = port->tty; + + mydbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty); + + /* TIOCMGET */ + UartNumber = port->tty->index - serial->minor; + + if (cmd == TIOCMGET) { + MCR_Value = port->shadowMCR; + MSR_Value = port->shadowMSR; + + { + result = ((MCR_Value & SERIAL_MCR_DTR) ? TIOCM_DTR : 0) + /* DTR IS SET */ + | ((MCR_Value & SERIAL_MCR_RTS) ? TIOCM_RTS : 0) + /* RTS IS SET */ + | ((MSR_Value & SERIAL_MSR_CTS) ? TIOCM_CTS : 0) + /* CTS is set */ + | ((MSR_Value & SERIAL_MSR_CD) ? TIOCM_CAR : 0) + /* Carrier detect is set */ + | ((MSR_Value & SERIAL_MSR_RI) ? TIOCM_RI : 0) + /* Ring indicator set */ + | ((MSR_Value & SERIAL_MSR_DSR) ? TIOCM_DSR : 0); + /* DSR is set */ + if (copy_to_user + ((unsigned int *)arg, &result, + sizeof(unsigned int))) + return -EFAULT; + return 0; + + } + } + + /* TIOCMBIS, TIOCMBIC, AND TIOCMSET */ + if (cmd == TIOCMBIS || cmd == TIOCMBIC || cmd == TIOCMSET) { + status = + BoxGetRegister(port->serial, UartNumber, + MODEM_CONTROL_REGISTER, &MCR_Value); + if (status < 0) + return -ESPIPE; + if (copy_from_user + (&value, (unsigned int *)arg, sizeof(unsigned int))) + return -EFAULT; + + switch (cmd) { + case TIOCMBIS: + if (value & TIOCM_RTS) + MCR_Value |= SERIAL_MCR_RTS; + if (value & TIOCM_DTR) + MCR_Value |= SERIAL_MCR_DTR; + if (value & TIOCM_LOOP) + MCR_Value |= SERIAL_MCR_LOOP; + break; + case TIOCMBIC: + if (value & TIOCM_RTS) + MCR_Value &= ~SERIAL_MCR_RTS; + if (value & TIOCM_DTR) + MCR_Value &= ~SERIAL_MCR_DTR; + if (value & TIOCM_LOOP) + MCR_Value &= ~SERIAL_MCR_LOOP; + break; + case TIOCMSET: + /* + * Turn off the RTS and DTR and loopbcck and then only + * turn on what was asked for + */ + MCR_Value &= + ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | + SERIAL_MCR_LOOP); + if (value & TIOCM_RTS) + MCR_Value |= SERIAL_MCR_RTS; + if (value & TIOCM_DTR) + MCR_Value |= SERIAL_MCR_DTR; + if (value & TIOCM_LOOP) + MCR_Value |= SERIAL_MCR_LOOP; + break; + default: + break; + + } + status = + BoxSetRegister(port->serial, UartNumber, + MODEM_CONTROL_REGISTER, MCR_Value); + if (status < 0) + return -ESPIPE; + else { + port->shadowMCR = MCR_Value; + return 0; + } + + } + /**************************************************************************************/ + /** TIOCMBIS, TIOCMBIC, AND TIOCMSET end + */ + /**************************************************************************************/ + + if (cmd == TIOCMIWAIT) { + DECLARE_WAITQUEUE(wait, current); + Prev_MSR_Value = port->shadowMSR & SERIAL_MSR_MASK; + while (1) { + add_wait_queue(&port->wait, &wait); + set_current_state(TASK_INTERRUPTIBLE); + schedule(); + remove_wait_queue(&port->wait, &wait); + /* see if a signal woke us up */ + if (signal_pending(current)) + return -ERESTARTSYS; + MSR_Value = port->shadowMSR & SERIAL_MSR_MASK; + if (MSR_Value == Prev_MSR_Value) + return -EIO; /* no change error */ + + if ((arg & TIOCM_RNG + && ((Prev_MSR_Value & SERIAL_MSR_RI) == + (MSR_Value & SERIAL_MSR_RI))) + || (arg & TIOCM_DSR + && ((Prev_MSR_Value & SERIAL_MSR_DSR) == + (MSR_Value & SERIAL_MSR_DSR))) + || (arg & TIOCM_CD + && ((Prev_MSR_Value & SERIAL_MSR_CD) == + (MSR_Value & SERIAL_MSR_CD))) + || (arg & TIOCM_CTS + && ((Prev_MSR_Value & SERIAL_MSR_CTS) == + (MSR_Value & SERIAL_MSR_CTS)))) { + return 0; + } + + } + + } + mydbg("%s -No ioctl for that one. port = %d\n", __func__, + port->number); + + return -ENOIOCTLCMD; +} + +static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) +{ + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + + if (!serial) + return; + + down(&port->sem); + + mydbg("%s - port %d\n", __func__, port->number); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + + /* pass on to the driver specific version of this function if it is available */ + qt_set_termios(port, old); + +exit: + up(&port->sem); +} + +static void qt_set_termios(struct usb_serial_port *port, + struct ktermios *old_termios) +{ + unsigned int cflag; + int baud, divisor, remainder; + unsigned char LCR_change_to = 0; + struct tty_struct *tty; + int status; + struct usb_serial *serial; + __u16 UartNumber; + __u16 tmp, tmp2; + + mydbg("%s - port %d\n", __func__, port->number); + + tmp = port->tty->index; + mydbg("%s - MINOR(port->tty->index) = %d\n", __func__, tmp); + + serial = port->serial; + tmp2 = serial->minor; + mydbg("%s - serial->minor = %d\n", __func__, tmp2); + + UartNumber = port->tty->index - serial->minor; + + tty = port->tty; + + cflag = tty->termios->c_cflag; + + if (old_termios) { + if ((cflag == old_termios->c_cflag) + && (RELEVANT_IFLAG(tty->termios->c_iflag) == + RELEVANT_IFLAG(old_termios->c_iflag))) { + mydbg("%s - Nothing to change\n", __func__); + return; + } + + } + + mydbg("%s - 3\n", __func__); + + switch (cflag) { + case CS5: + LCR_change_to |= SERIAL_5_DATA; + break; + case CS6: + LCR_change_to |= SERIAL_6_DATA; + break; + case CS7: + LCR_change_to |= SERIAL_7_DATA; + break; + default: + case CS8: + LCR_change_to |= SERIAL_8_DATA; + break; + } + + /* Parity stuff */ + if (cflag & PARENB) { + if (cflag & PARODD) + LCR_change_to |= SERIAL_ODD_PARITY; + else + LCR_change_to |= SERIAL_EVEN_PARITY; + } + if (cflag & CSTOPB) + LCR_change_to |= SERIAL_TWO_STOPB; + else + LCR_change_to |= SERIAL_TWO_STOPB; + + mydbg("%s - 4\n", __func__); + /* Thats the LCR stuff, go ahead and set it */ + baud = tty_get_baud_rate(tty); + if (!baud) { + /* pick a default, any default... */ + baud = 9600; + } + + mydbg("%s - got baud = %d\n", __func__, baud); + + divisor = MAX_BAUD_RATE / baud; + remainder = MAX_BAUD_RATE % baud; + /* Round to nearest divisor */ + if (((remainder * 2) >= baud) && (baud != 110)) + divisor++; + + /* + * Set Baud rate to default and turn off (default)flow control here + */ + status = + BoxSetUart(serial, UartNumber, (unsigned short)divisor, + LCR_change_to); + if (status < 0) { + mydbg(__FILE__ "BoxSetUart failed\n"); + return; + } + + /* Now determine flow control */ + if (cflag & CRTSCTS) { + mydbg("%s - Enabling HW flow control port %d\n", __func__, + port->number); + + /* Enable RTS/CTS flow control */ + status = BoxSetHW_FlowCtrl(serial, UartNumber, 1); + + if (status < 0) { + mydbg(__FILE__ "BoxSetHW_FlowCtrl failed\n"); + return; + } + } else { + /* Disable RTS/CTS flow control */ + mydbg("%s - disabling HW flow control port %d\n", __func__, + port->number); + + status = BoxSetHW_FlowCtrl(serial, UartNumber, 0); + if (status < 0) { + mydbg(__FILE__ "BoxSetHW_FlowCtrl failed\n"); + return; + } + + } + + /* if we are implementing XON/XOFF, set the start and stop character in + * the device */ + if (I_IXOFF(tty) || I_IXON(tty)) { + unsigned char stop_char = STOP_CHAR(tty); + unsigned char start_char = START_CHAR(tty); + status = + BoxSetSW_FlowCtrl(serial, UartNumber, stop_char, + start_char); + if (status < 0) + mydbg(__FILE__ "BoxSetSW_FlowCtrl (enabled) failed\n"); + + } else { + /* disable SW flow control */ + status = BoxDisable_SW_FlowCtrl(serial, UartNumber); + if (status < 0) + mydbg(__FILE__ "BoxSetSW_FlowCtrl (diabling) failed\n"); + + } + +} + +/**************************************************************************** +* BoxGetRegister +* issuse a GET_REGISTER vendor-spcific request on the default control pipe +* If successful, fills in the pValue with the register value asked for +****************************************************************************/ +static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number, + unsigned short Register_Num, __u8 *pValue) +{ + int result; + __u16 current_length; + + current_length = sizeof(struct qt_get_device_data); + + result = + usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), + QT_GET_SET_REGISTER, 0xC0, Register_Num, + Uart_Number, (void *)pValue, sizeof(*pValue), 300); + + return result; +} + +/**************************************************************************** +* BoxSetRegister +* issuse a GET_REGISTER vendor-spcific request on the default control pipe +* If successful, fills in the pValue with the register value asked for +****************************************************************************/ +static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number, + unsigned short Register_Num, unsigned short Value) +{ + int result; + unsigned short RegAndByte; + + RegAndByte = Value; + RegAndByte = RegAndByte << 8; + RegAndByte = RegAndByte + Register_Num; + +/* + result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_GET_SET_REGISTER, 0xC0, Register_Num, + Uart_Number, NULL, 0, 300); +*/ + + result = + usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_GET_SET_REGISTER, 0x40, RegAndByte, Uart_Number, + NULL, 0, 300); + + return result; +} + +/** + * box_get_device + * Issue a GET_DEVICE vendor-specific request on the default control pipe If + * successful, fills in the qt_get_device_data structure pointed to by + * device_data, otherwise return a negative error number of the problem. + */ +static int box_get_device(struct usb_serial *serial, + struct qt_get_device_data *device_data) +{ + int result; + __u16 current_length; + unsigned char *transfer_buffer; + + current_length = sizeof(struct qt_get_device_data); + transfer_buffer = kmalloc(current_length, GFP_KERNEL); + if (!transfer_buffer) + return -ENOMEM; + + result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), + QT_SET_GET_DEVICE, 0xc0, 0, 0, + transfer_buffer, current_length, 300); + if (result > 0) + memcpy(device_data, transfer_buffer, current_length); + kfree(transfer_buffer); + + return result; +} + +/** + * box_set_device + * Issue a SET_DEVICE vendor-specific request on the default control pipe If + * successful returns the number of bytes written, otherwise it returns a + * negative error number of the problem. + */ +static int box_set_device(struct usb_serial *serial, + struct qt_get_device_data *device_data) +{ + int result; + __u16 length; + __u16 PortSettings; + + PortSettings = ((__u16) (device_data->portb)); + PortSettings = (PortSettings << 8); + PortSettings += ((__u16) (device_data->porta)); + + length = sizeof(struct qt_get_device_data); + mydbg("%s - PortSettings = 0x%x\n", __func__, PortSettings); + + result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_SET_GET_DEVICE, 0x40, PortSettings, + 0, NULL, 0, 300); + return result; +} + +/**************************************************************************** + * BoxOPenCloseChannel + * This funciotn notifies the device that the device driver wishes to open a particular UART channel. its + * purpose is to allow the device driver and the device to synchronize state information. + * OpenClose = 1 for open , 0 for close + ****************************************************************************/ +static int BoxOPenCloseChannel(struct usb_serial *serial, __u16 Uart_Number, + __u16 OpenClose, + struct qt_open_channel_data *pDeviceData) +{ + int result; + __u16 length; + __u8 Direcion; + unsigned int pipe; + length = sizeof(struct qt_open_channel_data); + + /* if opening... */ + if (OpenClose == 1) { + Direcion = USBD_TRANSFER_DIRECTION_IN; + pipe = usb_rcvctrlpipe(serial->dev, 0); + result = + usb_control_msg(serial->dev, pipe, QT_OPEN_CLOSE_CHANNEL, + Direcion, OpenClose, Uart_Number, + pDeviceData, length, 300); + + } else { + Direcion = USBD_TRANSFER_DIRECTION_OUT; + pipe = usb_sndctrlpipe(serial->dev, 0); + result = + usb_control_msg(serial->dev, pipe, QT_OPEN_CLOSE_CHANNEL, + Direcion, OpenClose, Uart_Number, NULL, 0, + 300); + + } + + return result; +} + +/**************************************************************************** + * BoxSetPrebufferLevel + TELLS BOX WHEN TO ASSERT FLOW CONTROL + ****************************************************************************/ +static int BoxSetPrebufferLevel(struct usb_serial *serial) +{ + int result; + __u16 buffer_length; + + buffer_length = PREFUFF_LEVEL_CONSERVATIVE; + result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_GET_SET_PREBUF_TRIG_LVL, 0x40, + buffer_length, 0, NULL, 0, 300); + return result; +} + +/**************************************************************************** + * BoxSetATC + TELLS BOX WHEN TO ASSERT automatic transmitter control + ****************************************************************************/ +static int BoxSetATC(struct usb_serial *serial, __u16 n_Mode) +{ + int result; + __u16 buffer_length; + + buffer_length = PREFUFF_LEVEL_CONSERVATIVE; + + result = + usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_SET_ATF, 0x40, n_Mode, 0, NULL, 0, 300); + + return result; +} + +/**************************************************************************** +* BoxSetUart +* issuse a SET_UART vendor-spcific request on the default control pipe +* If successful sets baud rate divisor and LCR value +****************************************************************************/ +static int BoxSetUart(struct usb_serial *serial, unsigned short Uart_Number, + unsigned short default_divisor, unsigned char default_LCR) +{ + int result; + unsigned short UartNumandLCR; + + UartNumandLCR = (default_LCR << 8) + Uart_Number; + + result = + usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_GET_SET_UART, 0x40, default_divisor, + UartNumandLCR, NULL, 0, 300); + + return result; +} + +static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int UartNumber, + int bSet) +{ + __u8 MCR_Value = 0; + __u8 MSR_Value = 0, MOUT_Value = 0; + struct usb_serial_port *port; + unsigned int status; + + port = serial->port; + + if (bSet == 1) { + /* flow control, box will clear RTS line to prevent remote */ + MCR_Value = SERIAL_MCR_RTS; + } /* device from xmitting more chars */ + else { + /* no flow control to remote device */ + MCR_Value = 0; + + } + MOUT_Value = MCR_Value << 8; + + if (bSet == 1) { + /* flow control, box will inhibit xmit data if CTS line is + * asserted */ + MSR_Value = SERIAL_MSR_CTS; + } else { + /* Box will not inhimbe xmit data due to CTS line */ + MSR_Value = 0; + } + MOUT_Value |= MSR_Value; + + status = + usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_HW_FLOW_CONTROL_MASK, 0x40, MOUT_Value, + UartNumber, NULL, 0, 300); + return status; + +} + +static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 UartNumber, + unsigned char stop_char, unsigned char start_char) +{ + __u16 nSWflowout; + int result; + + nSWflowout = start_char << 8; + nSWflowout = (unsigned short)stop_char; + + result = + usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout, + UartNumber, NULL, 0, 300); + return result; + +} +static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 UartNumber) +{ + int result; + + result = + usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, UartNumber, + NULL, 0, 300); + return result; + +} + +static void serial_throttle(struct tty_struct *tty) +{ + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + mydbg("%s - port %d\n", __func__, port->number); + + if (!serial) + return; + + down(&port->sem); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + /* shut down any bulk reads that may be going on */ +/* usb_unlink_urb (port->read_urb); */ + /* pass on to the driver specific version of this function */ + port->RxHolding = 1; + mydbg("%s - port->RxHolding = 1\n", __func__); + +exit: + up(&port->sem); + return; +} + +static void serial_unthrottle(struct tty_struct *tty) +{ + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + unsigned int result; + + if (!serial) + return; + down(&port->sem); + + mydbg("%s - port %d\n", __func__, port->number); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + + if (port->RxHolding == 1) { + mydbg("%s -port->RxHolding == 1\n", __func__); + + port->RxHolding = 0; + mydbg("%s - port->RxHolding = 0\n", __func__); + + /* if we have a bulk endpoint, start it up */ + if ((serial->num_bulk_in) && (port->ReadBulkStopped == 1)) { + /* Start reading from the device */ + usb_fill_bulk_urb(port->read_urb, serial->dev, + usb_rcvbulkpipe(serial->dev, + port-> + bulk_in_endpointAddress), + port->read_urb->transfer_buffer, + port->read_urb-> + transfer_buffer_length, + qt_read_bulk_callback, port); + result = usb_submit_urb(port->read_urb, GFP_ATOMIC); + if (result) + err("%s - failed restarting read urb, error %d", + __func__, result); + } + } +exit: + up(&port->sem); + return; + +} + +static int serial_break(struct tty_struct *tty, int break_state) +{ + struct usb_serial_port *port = + (struct usb_serial_port *)tty->driver_data; + struct usb_serial *serial = get_usb_serial(port, __func__); + __u16 UartNumber, Break_Value; + unsigned int result; + + UartNumber = port->tty->index - serial->minor; + if (!serial) + return -ENODEV; + + if (break_state == -1) + Break_Value = 1; + else + Break_Value = 0; + + down(&port->sem); + + mydbg("%s - port %d\n", __func__, port->number); + + if (!port->open_count) { + mydbg("%s - port not open\n", __func__); + goto exit; + } + + result = + usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT_BREAK_CONTROL, 0x40, Break_Value, UartNumber, + NULL, 0, 300); + +exit: + up(&port->sem); + return 0; +} + +static int ioctl_serial_usb(struct inode *innod, struct file *filp, unsigned int cmd, + unsigned long arg) +{ + + unsigned err; + unsigned ucOPR_NewValue, uc_Value; + int *p_Num_of_adapters, counts, index, *p_QMCR_Value; + struct identity *p_Identity_of; + struct identity Identity_of; + struct usb_serial *lastserial, *serial; + + mydbg(KERN_DEBUG "ioctl_serial_usb cmd =\n"); + if (_IOC_TYPE(cmd) != SERIALQT_PCI_IOC_MAGIC) + return -ENOTTY; + if (_IOC_NR(cmd) > SERIALQT_IOC_MAXNR) + return -ENOTTY; + mydbg(KERN_DEBUG "ioctl_serial_usb cmd = 0x%x\n", cmd); + err = 0; + switch (cmd) { + + case SERIALQT_WRITE_QMCR: + err = -ENOTTY; + index = arg >> 16; + counts = 0; + + ucOPR_NewValue = arg; + + err = EmulateWriteQMCR_Reg(index, ucOPR_NewValue); + break; + + case SERIALQT_READ_QMCR: + err = -ENOTTY; + p_QMCR_Value = (int *)arg; + index = arg >> 16; + counts = 0; + + err = EmulateReadQMCR_Reg(index, &uc_Value); + if (err == 0) + err = put_user(uc_Value, p_QMCR_Value); + break; + + case SERIALQT_GET_NUMOF_UNITS: + p_Num_of_adapters = (int *)arg; + counts = 0; /* Initialize counts to zero */ + /* struct usb_serial *lastserial = serial_table[0], *serial; */ + lastserial = serial_table[0]; + + mydbg(KERN_DEBUG "SERIALQT_GET_NUMOF_UNITS \n"); + /* if first pointer is nonull, we at least have one box */ + if (lastserial) + counts = 1; /* we at least have one box */ + + for (index = 1; index < SERIAL_TTY_MINORS; index++) { + serial = serial_table[index]; + if (serial) { + if (serial != lastserial) { + /* we had a change in the array, hence + * another box is there */ + lastserial = serial; + counts++; + } + } else + break; + } + + mydbg(KERN_DEBUG "ioctl_serial_usb writting counts = %d", + counts); + + err = put_user(counts, p_Num_of_adapters); + + break; + case SERIALQT_GET_THIS_UNIT: + counts = 0; + p_Identity_of = (struct identity *)arg; + /* copy user structure to local variable */ + get_user(Identity_of.index, &p_Identity_of->index); + mydbg(KERN_DEBUG "SERIALQT_GET_THIS_UNIT Identity_of.index\n"); + mydbg(KERN_DEBUG + "SERIALQT_GET_THIS_UNIT Identity_of.index= 0x%x\n", + Identity_of.index); + + err = -ENOTTY; + serial = find_the_box(Identity_of.index); + if (serial) { + err = + put_user(serial->product, + &p_Identity_of->n_identity); + + } + break; + + case SERIALQT_IS422_EXTENDED: + err = -ENOTTY; + mydbg(KERN_DEBUG "SERIALQT_IS422_EXTENDED \n"); + index = arg >> 16; + + counts = 0; + + mydbg(KERN_DEBUG + "SERIALQT_IS422_EXTENDED, looking Identity_of.indext = 0x%x\n", + index); + serial = find_the_box(index); + if (serial) { + mydbg("%s index = 0x%x, serial = 0x%p\n", __func__, + index, serial); + for (counts = 0; serqt_422_table[counts] != 0; counts++) { + + mydbg + ("%s serial->product = = 0x%x, serqt_422_table[counts] = 0x%x\n", + __func__, serial->product, + serqt_422_table[counts]); + if (serial->product == serqt_422_table[counts]) { + err = 0; + + mydbg + ("%s found match for 422extended\n", + __func__); + break; + } + } + } + break; + + default: + err = -ENOTTY; + } + + mydbg("%s returning err = 0x%x\n", __func__, err); + return err; +} + +static struct usb_serial *find_the_box(unsigned int index) +{ + struct usb_serial *lastserial, *foundserial, *serial; + int counts = 0, index2; + lastserial = serial_table[0]; + foundserial = NULL; + for (index2 = 0; index2 < SERIAL_TTY_MINORS; index2++) { + serial = serial_table[index2]; + + mydbg("%s index = 0x%x, index2 = 0x%x, serial = 0x%p\n", + __func__, index, index2, serial); + + if (serial) { + /* first see if this is the unit we'er looking for */ + mydbg + ("%s inside if(serial) counts = 0x%x , index = 0x%x\n", + __func__, counts, index); + if (counts == index) { + /* we found the one we're looking for, copythe + * product Id to user */ + mydbg("%s we found the one we're looking for serial = 0x%p\n", + __func__, serial); + foundserial = serial; + break; + } + + if (serial != lastserial) { + /* when we have a change in the pointer */ + lastserial = serial; + counts++; + } + } else + break; /* no matches */ + } + + mydbg("%s returning foundserial = 0x%p\n", __func__, foundserial); + return foundserial; +} + +static int EmulateWriteQMCR_Reg(int index, unsigned uc_value) +{ + + __u16 ATC_Mode = 0; + struct usb_serial *serial; + int status; + struct qt_get_device_data DeviceData; + unsigned uc_temp = 0; + mydbg("Inside %s, uc_value = 0x%x\n", __func__, uc_value); + + DeviceData.porta = 0; + DeviceData.portb = 0; + serial = find_the_box(index); + /* Determine Duplex mode */ + if (!(serial)) + return -ENOTTY; + status = box_get_device(serial, &DeviceData); + if (status < 0) { + mydbg(__FILE__ "box_set_device failed\n"); + return status; + } + + uc_temp = uc_value & QMCR_HALF_DUPLEX_MASK; + switch (uc_temp) { + case QMCR_FULL_DUPLEX: + DeviceData.porta &= ~DUPMODE_BITS; + DeviceData.porta |= FULL_DUPLEX; + ATC_Mode = ATC_DISABLED; + break; + case QMCR_HALF_DUPLEX_RTS: + DeviceData.porta &= ~DUPMODE_BITS; + DeviceData.porta |= HALF_DUPLEX_RTS; + ATC_Mode = ATC_RTS_ENABLED; + break; + case QMCR_HALF_DUPLEX_DTR: + DeviceData.porta &= ~DUPMODE_BITS; + DeviceData.porta |= HALF_DUPLEX_DTR; + ATC_Mode = ATC_DTR_ENABLED; + break; + default: + break; + } + + uc_temp = uc_value & QMCR_CONNECTOR_MASK; + switch (uc_temp) { + case QMCR_MODEM_CONTROL: + DeviceData.portb &= ~LOOPMODE_BITS; /* reset connection bits */ + DeviceData.portb |= MODEM_CTRL; + break; + case QMCR_ALL_LOOPBACK: + DeviceData.portb &= ~LOOPMODE_BITS; /* reset connection bits */ + DeviceData.portb |= ALL_LOOPBACK; + break; + } + + mydbg(__FILE__ "Calling box_set_device with failed\n"); + status = box_set_device(serial, &DeviceData); + if (status < 0) { + mydbg(__FILE__ "box_set_device failed\n"); + return status; + } + + /* This bit (otherwise unused) i'll used to detect whether ATC is + * selected */ + if (uc_value & QMCR_RX_EN_MASK) { + + mydbg(__FILE__ + "calling BoxsetATC with DeviceData.porta = 0x%x and DeviceData.portb = 0x%x\n", + DeviceData.porta, DeviceData.portb); + status = BoxSetATC(serial, ATC_Mode); + if (status < 0) { + mydbg(__FILE__ "BoxSetATC failed\n"); + return status; + } + } else { + + mydbg(__FILE__ + "calling BoxsetATC with DeviceData.porta = 0x%x and DeviceData.portb = 0x%x\n", + DeviceData.porta, DeviceData.portb); + status = BoxSetATC(serial, ATC_DISABLED); + if (status < 0) { + mydbg(__FILE__ "BoxSetATC failed\n"); + return status; + } + } + + return 0; + +} + +static int EmulateReadQMCR_Reg(int index, unsigned *uc_value) +{ + struct usb_serial *serial; + int status; + struct qt_get_device_data DeviceData; + __u8 uc_temp; + + *uc_value = 0; + + serial = find_the_box(index); + if (!(serial)) + return -ENOTTY; + + status = box_get_device(serial, &DeviceData); + if (status < 0) { + mydbg(__FILE__ "box_get_device failed\n"); + return status; + } + uc_temp = DeviceData.porta & DUPMODE_BITS; + switch (uc_temp) { + case FULL_DUPLEX: + *uc_value |= QMCR_FULL_DUPLEX; + break; + case HALF_DUPLEX_RTS: + *uc_value |= QMCR_HALF_DUPLEX_RTS; + break; + case HALF_DUPLEX_DTR: + *uc_value |= QMCR_HALF_DUPLEX_DTR; + break; + default: + break; + } + + /* I use this for ATC control se */ + uc_temp = DeviceData.portb & LOOPMODE_BITS; + + switch (uc_temp) { + case ALL_LOOPBACK: + *uc_value |= QMCR_ALL_LOOPBACK; + break; + case MODEM_CTRL: + *uc_value |= QMCR_MODEM_CONTROL; + break; + default: + break; + + } + return 0; + +} + +static int __init serqt_usb_init(void) +{ + int i, result; + int status = 0; + + mydbg("%s\n", __func__); + tty_set_operations(&serial_tty_driver, &serial_ops); + result = tty_register_driver(&serial_tty_driver); + if (result) { + mydbg("tty_register_driver failed error = 0x%x", result); + return result; + } + + /* Initalize our global data */ + for (i = 0; i < SERIAL_TTY_MINORS; ++i) + serial_table[i] = NULL; + + /* register this driver with the USB subsystem */ + result = usb_register(&serqt_usb_driver); + if (result < 0) { + err("usb_register failed for the " __FILE__ + " driver. Error number %d", result); + return result; + } + status = 0; /* Dynamic assignment of major number */ + major_number = + register_chrdev(status, "SerialQT_USB", &serialqt_usb_fops); + if (major_number < 0) { + mydbg(KERN_DEBUG "No devices found \n\n"); + return -EBUSY; + } else + mydbg(KERN_DEBUG "SerQT_USB major number assignment = %d \n\n", + major_number); + + printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION); + return 0; +} + +static void __exit serqt_usb_exit(void) +{ + /* deregister this driver with the USB subsystem */ + usb_deregister(&serqt_usb_driver); + tty_unregister_driver(&serial_tty_driver); + unregister_chrdev(major_number, "SerialQT_USB"); +} + +module_init(serqt_usb_init); +module_exit(serqt_usb_exit); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); |