/* * Aten 2011 USB serial driver for 4 port devices * * Copyright (C) 2000 Inside Out Networks * Copyright (C) 2001-2002, 2009 Greg Kroah-Hartman * Copyright (C) 2009 Novell Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * */ #include #include #include #include #include #include #include #include #include #include #include #include #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ #define ZLP_REG2 0x3B /* Zero_Flag_Reg2 59 */ #define ZLP_REG3 0x3C /* Zero_Flag_Reg3 60 */ #define ZLP_REG4 0x3D /* Zero_Flag_Reg4 61 */ #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ /* Interrupt Rotinue Defines */ #define SERIAL_IIR_RLS 0x06 #define SERIAL_IIR_RDA 0x04 #define SERIAL_IIR_CTI 0x0c #define SERIAL_IIR_THR 0x02 #define SERIAL_IIR_MS 0x00 /* Emulation of the bit mask on the LINE STATUS REGISTER. */ #define SERIAL_LSR_DR 0x0001 #define SERIAL_LSR_OE 0x0002 #define SERIAL_LSR_PE 0x0004 #define SERIAL_LSR_FE 0x0008 #define SERIAL_LSR_BI 0x0010 #define SERIAL_LSR_THRE 0x0020 #define SERIAL_LSR_TEMT 0x0040 #define SERIAL_LSR_FIFOERR 0x0080 /* MSR bit defines(place holders) */ #define ATEN_MSR_DELTA_CTS 0x10 #define ATEN_MSR_DELTA_DSR 0x20 #define ATEN_MSR_DELTA_RI 0x40 #define ATEN_MSR_DELTA_CD 0x80 /* Serial Port register Address */ #define RECEIVE_BUFFER_REGISTER ((__u16)(0x00)) #define TRANSMIT_HOLDING_REGISTER ((__u16)(0x00)) #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) #define INTERRUPT_IDENT_REGISTER ((__u16)(0x02)) #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) #define LINE_CONTROL_REGISTER ((__u16)(0x03)) #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) #define LINE_STATUS_REGISTER ((__u16)(0x05)) #define MODEM_STATUS_REGISTER ((__u16)(0x06)) #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) #define DIVISOR_LATCH_LSB ((__u16)(0x00)) #define DIVISOR_LATCH_MSB ((__u16)(0x01)) #define SP1_REGISTER ((__u16)(0x00)) #define CONTROL1_REGISTER ((__u16)(0x01)) #define CLK_MULTI_REGISTER ((__u16)(0x02)) #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) #define DCR1_REGISTER ((__u16)(0x04)) #define GPIO_REGISTER ((__u16)(0x07)) #define SERIAL_LCR_DLAB ((__u16)(0x0080)) /* * URB POOL related defines */ #define NUM_URBS 16 /* URB Count */ #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ #define USB_VENDOR_ID_ATENINTL 0x0557 #define ATENINTL_DEVICE_ID_2011 0x2011 #define ATENINTL_DEVICE_ID_7820 0x7820 static struct usb_device_id id_table[] = { { USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_2011) }, { USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_7820) }, { } /* terminating entry */ }; MODULE_DEVICE_TABLE(usb, id_table); /* This structure holds all of the local port information */ struct ATENINTL_port { int port_num; /*Actual port number in the device(1,2,etc)*/ __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ unsigned char *bulk_out_buffer; /* buffer used for the bulk out endpoint */ struct urb *write_urb; /* write URB for this port */ __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ struct urb *read_urb; /* read URB for this port */ __u8 shadowLCR; /* last LCR value received */ __u8 shadowMCR; /* last MCR value received */ char open; char chaseResponsePending; wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ struct async_icount icount; struct usb_serial_port *port; /* loop back to the owner of this object */ /*Offsets*/ __u8 SpRegOffset; __u8 ControlRegOffset; __u8 DcrRegOffset; /* for processing control URBS in interrupt context */ struct urb *control_urb; char *ctrl_buf; int MsrLsr; struct urb *write_urb_pool[NUM_URBS]; /* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */ struct ktermios tmp_termios; /* stores the old termios settings */ spinlock_t lock; /* private lock */ }; /* This structure holds all of the individual serial device information */ struct ATENINTL_serial { __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ struct urb *interrupt_read_urb; /* our interrupt urb */ __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ struct urb *read_urb; /* our bulk read urb */ __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ struct usb_serial *serial; /* loop back to the owner of this object */ int ATEN2011_spectrum_2or4ports; /* this says the number of ports in the device */ /* Indicates about the no.of opened ports of an individual USB-serial adapater. */ unsigned int NoOfOpenPorts; /* a flag for Status endpoint polling */ unsigned char status_polling_started; }; static void ATEN2011_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios); static void ATEN2011_change_port_settings(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios); /************************************* * Bit definitions for each register * *************************************/ #define LCR_BITS_5 0x00 /* 5 bits/char */ #define LCR_BITS_6 0x01 /* 6 bits/char */ #define LCR_BITS_7 0x02 /* 7 bits/char */ #define LCR_BITS_8 0x03 /* 8 bits/char */ #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ #define LCR_STOP_1 0x00 /* 1 stop bit */ #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ #define LCR_PAR_NONE 0x00 /* No parity */ #define LCR_PAR_ODD 0x08 /* Odd parity */ #define LCR_PAR_EVEN 0x18 /* Even parity */ #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ #define LCR_PAR_MASK 0x38 /* Mask for parity field */ #define LCR_SET_BREAK 0x40 /* Set Break condition */ #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ #define MCR_DTR 0x01 /* Assert DTR */ #define MCR_RTS 0x02 /* Assert RTS */ #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ #define ATEN2011_MSR_CTS 0x10 /* Current state of CTS */ #define ATEN2011_MSR_DSR 0x20 /* Current state of DSR */ #define ATEN2011_MSR_RI 0x40 /* Current state of RI */ #define ATEN2011_MSR_CD 0x80 /* Current state of CD */ static int debug; /* * Version Information */ #define DRIVER_VERSION "2.0" #define DRIVER_DESC "ATENINTL 2011 USB Serial Adapter" /* * Defines used for sending commands to port */ #define ATEN_WDR_TIMEOUT (50) /* default urb timeout */ /* Requests */ #define ATEN_RD_RTYPE 0xC0 #define ATEN_WR_RTYPE 0x40 #define ATEN_RDREQ 0x0D #define ATEN_WRREQ 0x0E #define ATEN_CTRL_TIMEOUT 500 #define VENDOR_READ_LENGTH (0x01) /* set to 1 for RS485 mode and 0 for RS232 mode */ /* FIXME make this somehow dynamic and not build time specific */ static int RS485mode; static int set_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 val) { struct usb_device *dev = port->serial->dev; val = val & 0x00ff; dbg("%s: is %x, value %x", __func__, reg, val); return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ATEN_WRREQ, ATEN_WR_RTYPE, val, reg, NULL, 0, ATEN_WDR_TIMEOUT); } static int get_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 *val) { struct usb_device *dev = port->serial->dev; int ret; ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ATEN_RDREQ, ATEN_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, ATEN_WDR_TIMEOUT); dbg("%s: offset is %x, return val %x", __func__, reg, *val); *val = (*val) & 0x00ff; return ret; } static int set_uart_reg(struct usb_serial_port *port, __u16 reg, __u16 val) { struct usb_device *dev = port->serial->dev; struct ATENINTL_serial *a_serial; __u16 minor; a_serial = usb_get_serial_data(port->serial); minor = port->serial->minor; if (minor == SERIAL_TTY_NO_MINOR) minor = 0; val = val & 0x00ff; /* * For the UART control registers, * the application number need to be Or'ed */ if (a_serial->ATEN2011_spectrum_2or4ports == 4) val |= (((__u16)port->number - minor) + 1) << 8; else { if (((__u16) port->number - minor) == 0) val |= (((__u16)port->number - minor) + 1) << 8; else val |= (((__u16)port->number - minor) + 2) << 8; } dbg("%s: application number is %x", __func__, val); return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ATEN_WRREQ, ATEN_WR_RTYPE, val, reg, NULL, 0, ATEN_WDR_TIMEOUT); } static int get_uart_reg(struct usb_serial_port *port, __u16 reg, __u16 *val) { struct usb_device *dev = port->serial->dev; int ret = 0; __u16 wval; struct ATENINTL_serial *a_serial; __u16 minor = port->serial->minor; a_serial = usb_get_serial_data(port->serial); if (minor == SERIAL_TTY_NO_MINOR) minor = 0; /* wval is same as application number */ if (a_serial->ATEN2011_spectrum_2or4ports == 4) wval = (((__u16)port->number - minor) + 1) << 8; else { if (((__u16) port->number - minor) == 0) wval = (((__u16) port->number - minor) + 1) << 8; else wval = (((__u16) port->number - minor) + 2) << 8; } dbg("%s: application number is %x", __func__, wval); ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ATEN_RDREQ, ATEN_RD_RTYPE, wval, reg, val, VENDOR_READ_LENGTH, ATEN_WDR_TIMEOUT); *val = (*val) & 0x00ff; return ret; } static int handle_newMsr(struct ATENINTL_port *port, __u8 newMsr) { struct ATENINTL_port *ATEN2011_port; struct async_icount *icount; ATEN2011_port = port; icount = &ATEN2011_port->icount; if (newMsr & (ATEN_MSR_DELTA_CTS | ATEN_MSR_DELTA_DSR | ATEN_MSR_DELTA_RI | ATEN_MSR_DELTA_CD)) { icount = &ATEN2011_port->icount; /* update input line counters */ if (newMsr & ATEN_MSR_DELTA_CTS) icount->cts++; if (newMsr & ATEN_MSR_DELTA_DSR) icount->dsr++; if (newMsr & ATEN_MSR_DELTA_CD) icount->dcd++; if (newMsr & ATEN_MSR_DELTA_RI) icount->rng++; } return 0; } static int handle_newLsr(struct ATENINTL_port *port, __u8 newLsr) { struct async_icount *icount; dbg("%s - %02x", __func__, newLsr); if (newLsr & SERIAL_LSR_BI) { /* * Parity and Framing errors only count if they occur exclusive * of a break being received. */ newLsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); } /* update input line counters */ icount = &port->icount; if (newLsr & SERIAL_LSR_BI) icount->brk++; if (newLsr & SERIAL_LSR_OE) icount->overrun++; if (newLsr & SERIAL_LSR_PE) icount->parity++; if (newLsr & SERIAL_LSR_FE) icount->frame++; return 0; } static void ATEN2011_control_callback(struct urb *urb) { unsigned char *data; struct ATENINTL_port *ATEN2011_port; __u8 regval = 0x0; switch (urb->status) { case 0: /* success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ dbg("%s - urb shutting down with status: %d", __func__, urb->status); return; default: dbg("%s - nonzero urb status received: %d", __func__, urb->status); goto exit; } ATEN2011_port = (struct ATENINTL_port *)urb->context; dbg("%s urb buffer size is %d", __func__, urb->actual_length); dbg("%s ATEN2011_port->MsrLsr is %d port %d", __func__, ATEN2011_port->MsrLsr, ATEN2011_port->port_num); data = urb->transfer_buffer; regval = (__u8) data[0]; dbg("%s data is %x", __func__, regval); if (ATEN2011_port->MsrLsr == 0) handle_newMsr(ATEN2011_port, regval); else if (ATEN2011_port->MsrLsr == 1) handle_newLsr(ATEN2011_port, regval); exit: return; } static int ATEN2011_get_reg(struct ATENINTL_port *ATEN, __u16 Wval, __u16 reg, __u16 *val) { struct usb_device *dev = ATEN->port->serial->dev; struct usb_ctrlrequest *dr = NULL; unsigned char *buffer = NULL; int ret = 0; buffer = (__u8 *) ATEN->ctrl_buf; dr = (void *)(buffer + 2); dr->bRequestType = ATEN_RD_RTYPE; dr->bRequest = ATEN_RDREQ; dr->wValue = cpu_to_le16(Wval); dr->wIndex = cpu_to_le16(reg); dr->wLength = cpu_to_le16(2); usb_fill_control_urb(ATEN->control_urb, dev, usb_rcvctrlpipe(dev, 0), (unsigned char *)dr, buffer, 2, ATEN2011_control_callback, ATEN); ATEN->control_urb->transfer_buffer_length = 2; ret = usb_submit_urb(ATEN->control_urb, GFP_ATOMIC); return ret; } static void ATEN2011_interrupt_callback(struct urb *urb) { int result; int length; struct ATENINTL_port *ATEN2011_port; struct ATENINTL_serial *ATEN2011_serial; struct usb_serial *serial; __u16 Data; unsigned char *data; __u8 sp[5], st; int i; __u16 wval; int minor; dbg("%s", " : Entering"); ATEN2011_serial = (struct ATENINTL_serial *)urb->context; switch (urb->status) { case 0: /* success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ dbg("%s - urb shutting down with status: %d", __func__, urb->status); return; default: dbg("%s - nonzero urb status received: %d", __func__, urb->status); goto exit; } length = urb->actual_length; data = urb->transfer_buffer; serial = ATEN2011_serial->serial; /* ATENINTL get 5 bytes * Byte 1 IIR Port 1 (port.number is 0) * Byte 2 IIR Port 2 (port.number is 1) * Byte 3 IIR Port 3 (port.number is 2) * Byte 4 IIR Port 4 (port.number is 3) * Byte 5 FIFO status for both */ if (length && length > 5) { dbg("%s", "Wrong data !!!"); return; } /* MATRIX */ if (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 4) { sp[0] = (__u8) data[0]; sp[1] = (__u8) data[1]; sp[2] = (__u8) data[2]; sp[3] = (__u8) data[3]; st = (__u8) data[4]; } else { sp[0] = (__u8) data[0]; sp[1] = (__u8) data[2]; /* sp[2]=(__u8)data[2]; */ /* sp[3]=(__u8)data[3]; */ st = (__u8) data[4]; } for (i = 0; i < serial->num_ports; i++) { ATEN2011_port = usb_get_serial_port_data(serial->port[i]); minor = serial->minor; if (minor == SERIAL_TTY_NO_MINOR) minor = 0; if ((ATEN2011_serial->ATEN2011_spectrum_2or4ports == 2) && (i != 0)) wval = (((__u16) serial->port[i]->number - (__u16) (minor)) + 2) << 8; else wval = (((__u16) serial->port[i]->number - (__u16) (minor)) + 1) << 8; if (ATEN2011_port->open != 0) { if (sp[i] & 0x01) { dbg("SP%d No Interrupt !!!", i); } else { switch (sp[i] & 0x0f) { case SERIAL_IIR_RLS: dbg("Serial Port %d: Receiver status error or address bit detected in 9-bit mode", i); ATEN2011_port->MsrLsr = 1; ATEN2011_get_reg(ATEN2011_port, wval, LINE_STATUS_REGISTER, &Data); break; case SERIAL_IIR_MS: dbg("Serial Port %d: Modem status change", i); ATEN2011_port->MsrLsr = 0; ATEN2011_get_reg(ATEN2011_port, wval, MODEM_STATUS_REGISTER, &Data); break; } } } } exit: if (ATEN2011_serial->status_polling_started == 0) return; result = usb_submit_urb(urb, GFP_ATOMIC); if (result) { dev_err(&urb->dev->dev, "%s - Error %d submitting interrupt urb\n", __func__, result); } return; } static void ATEN2011_bulk_in_callback(struct urb *urb) { int status; unsigned char *data; struct usb_serial *serial; struct usb_serial_port *port; struct ATENINTL_serial *ATEN2011_serial; struct ATENINTL_port *ATEN2011_port; struct tty_struct *tty; if (urb->status) { dbg("nonzero read bulk status received: %d", urb->status); return; } ATEN2011_port = (struct ATENINTL_port *)urb->context; port = (struct usb_serial_port *)ATEN2011_port->port; serial = port->serial; dbg("%s", "Entering..."); data = urb->transfer_buffer; ATEN2011_serial = usb_get_serial_data(serial); if (urb->actual_length) { tty = tty_port_tty_get(&ATEN2011_port->port->port); if (tty) { tty_buffer_request_room(tty, urb->actual_length); tty_insert_flip_string(tty, data, urb->actual_length); tty_flip_buffer_push(tty); tty_kref_put(tty); } ATEN2011_port->icount.rx += urb->actual_length; dbg("ATEN2011_port->icount.rx is %d:", ATEN2011_port->icount.rx); } if (!ATEN2011_port->read_urb) { dbg("%s", "URB KILLED !!!"); return; } if (ATEN2011_port->read_urb->status != -EINPROGRESS) { ATEN2011_port->read_urb->dev = serial->dev; status = usb_submit_urb(ATEN2011_port->read_urb, GFP_ATOMIC); if (status) dbg("usb_submit_urb(read bulk) failed, status = %d", status); } } static void ATEN2011_bulk_out_data_callback(struct urb *urb) { struct ATENINTL_port *ATEN2011_port; struct tty_struct *tty; if (urb->status) { dbg("nonzero write bulk status received:%d", urb->status); return; } ATEN2011_port = (struct ATENINTL_port *)urb->context; dbg("%s", "Entering ........."); tty = tty_port_tty_get(&ATEN2011_port->port->port); if (tty && ATEN2011_port->open) /* tell the tty driver that something has changed */ tty_wakeup(tty); /* schedule_work(&ATEN2011_port->port->work); */ tty_kref_put(tty); } #ifdef ATENSerialProbe static int ATEN2011_serial_probe(struct usb_serial *serial, const struct usb_device_id *id) { /*need to implement the mode_reg reading and updating\ structures usb_serial_ device_type\ (i.e num_ports, num_bulkin,bulkout etc) */ /* Also we can update the changes attach */ return 1; } #endif static int ATEN2011_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) { int response; int j; struct usb_serial *serial; struct urb *urb; __u16 Data; int status; struct ATENINTL_serial *ATEN2011_serial; struct ATENINTL_port *ATEN2011_port; struct ktermios tmp_termios; int minor; serial = port->serial; ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) return -ENODEV; ATEN2011_serial = usb_get_serial_data(serial); if (ATEN2011_serial == NULL) return -ENODEV; /* increment the number of opened ports counter here */ ATEN2011_serial->NoOfOpenPorts++; usb_clear_halt(serial->dev, port->write_urb->pipe); usb_clear_halt(serial->dev, port->read_urb->pipe); /* Initialising the write urb pool */ for (j = 0; j < NUM_URBS; ++j) { urb = usb_alloc_urb(0, GFP_ATOMIC); ATEN2011_port->write_urb_pool[j] = urb; if (urb == NULL) { err("No more urbs???"); continue; } urb->transfer_buffer = NULL; urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); if (!urb->transfer_buffer) { err("%s-out of memory for urb buffers.", __func__); continue; } } /***************************************************************************** * Initialize ATEN2011 -- Write Init values to corresponding Registers * * Register Index * 1 : IER * 2 : FCR * 3 : LCR * 4 : MCR * * 0x08 : SP1/2 Control Reg *****************************************************************************/ /* NEED to check the fallowing Block */ Data = 0x0; status = get_reg_sync(port, ATEN2011_port->SpRegOffset, &Data); if (status < 0) { dbg("Reading Spreg failed"); return -1; } Data |= 0x80; status = set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); if (status < 0) { dbg("writing Spreg failed"); return -1; } Data &= ~0x80; status = set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); if (status < 0) { dbg("writing Spreg failed"); return -1; } /* End of block to be checked */ /**************************CHECK***************************/ if (RS485mode == 0) Data = 0xC0; else Data = 0x00; status = set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); if (status < 0) { dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", status); return -1; } else dbg("SCRATCH_PAD_REGISTER Writing success status%d", status); /**************************CHECK***************************/ Data = 0x0; status = get_reg_sync(port, ATEN2011_port->ControlRegOffset, &Data); if (status < 0) { dbg("Reading Controlreg failed"); return -1; } Data |= 0x08; /* Driver done bit */ Data |= 0x20; /* rx_disable */ status = 0; status = set_reg_sync(port, ATEN2011_port->ControlRegOffset, Data); if (status < 0) { dbg("writing Controlreg failed"); return -1; } /* * do register settings here * Set all regs to the device default values. * First Disable all interrupts. */ Data = 0x00; status = set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); if (status < 0) { dbg("disableing interrupts failed"); return -1; } /* Set FIFO_CONTROL_REGISTER to the default value */ Data = 0x00; status = set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); if (status < 0) { dbg("Writing FIFO_CONTROL_REGISTER failed"); return -1; } Data = 0xcf; /* chk */ status = set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); if (status < 0) { dbg("Writing FIFO_CONTROL_REGISTER failed"); return -1; } Data = 0x03; /* LCR_BITS_8 */ status = set_uart_reg(port, LINE_CONTROL_REGISTER, Data); ATEN2011_port->shadowLCR = Data; Data = 0x0b; /* MCR_DTR|MCR_RTS|MCR_MASTER_IE */ status = set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); ATEN2011_port->shadowMCR = Data; #ifdef Check Data = 0x00; status = get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); ATEN2011_port->shadowLCR = Data; Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ status = set_uart_reg(port, LINE_CONTROL_REGISTER, Data); Data = 0x0c; status = set_uart_reg(port, DIVISOR_LATCH_LSB, Data); Data = 0x0; status = set_uart_reg(port, DIVISOR_LATCH_MSB, Data); Data = 0x00; status = get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); /* Data = ATEN2011_port->shadowLCR; */ /* data latch disable */ Data = Data & ~SERIAL_LCR_DLAB; status = set_uart_reg(port, LINE_CONTROL_REGISTER, Data); ATEN2011_port->shadowLCR = Data; #endif /* clearing Bulkin and Bulkout Fifo */ Data = 0x0; status = get_reg_sync(port, ATEN2011_port->SpRegOffset, &Data); Data = Data | 0x0c; status = set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); Data = Data & ~0x0c; status = set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); /* Finally enable all interrupts */ Data = 0x0; Data = 0x0c; status = set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); /* clearing rx_disable */ Data = 0x0; status = get_reg_sync(port, ATEN2011_port->ControlRegOffset, &Data); Data = Data & ~0x20; status = set_reg_sync(port, ATEN2011_port->ControlRegOffset, Data); /* rx_negate */ Data = 0x0; status = get_reg_sync(port, ATEN2011_port->ControlRegOffset, &Data); Data = Data | 0x10; status = 0; status = set_reg_sync(port, ATEN2011_port->ControlRegOffset, Data); /* * Check to see if we've set up our endpoint info yet * (can't set it up in ATEN2011_startup as the structures * were not set up at that time.) */ if (ATEN2011_serial->NoOfOpenPorts == 1) { /* start the status polling here */ ATEN2011_serial->status_polling_started = 1; /* If not yet set, Set here */ ATEN2011_serial->interrupt_in_buffer = serial->port[0]->interrupt_in_buffer; ATEN2011_serial->interrupt_in_endpoint = serial->port[0]->interrupt_in_endpointAddress; ATEN2011_serial->interrupt_read_urb = serial->port[0]->interrupt_in_urb; /* set up interrupt urb */ usb_fill_int_urb(ATEN2011_serial->interrupt_read_urb, serial->dev, usb_rcvintpipe(serial->dev, ATEN2011_serial-> interrupt_in_endpoint), ATEN2011_serial->interrupt_in_buffer, ATEN2011_serial->interrupt_read_urb-> transfer_buffer_length, ATEN2011_interrupt_callback, ATEN2011_serial, ATEN2011_serial->interrupt_read_urb->interval); /* start interrupt read for ATEN2011 * * will continue as long as ATEN2011 is connected */ response = usb_submit_urb(ATEN2011_serial->interrupt_read_urb, GFP_KERNEL); if (response) { dbg("%s - Error %d submitting interrupt urb", __func__, response); } } /* * See if we've set up our endpoint info yet * (can't set it up in ATEN2011_startup as the * structures were not set up at that time.) */ dbg("port number is %d", port->number); dbg("serial number is %d", port->serial->minor); dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); dbg("port's number in the device is %d", ATEN2011_port->port_num); ATEN2011_port->bulk_in_buffer = port->bulk_in_buffer; ATEN2011_port->bulk_in_endpoint = port->bulk_in_endpointAddress; ATEN2011_port->read_urb = port->read_urb; ATEN2011_port->bulk_out_endpoint = port->bulk_out_endpointAddress; minor = port->serial->minor; if (minor == SERIAL_TTY_NO_MINOR) minor = 0; /* set up our bulk in urb */ if ((ATEN2011_serial->ATEN2011_spectrum_2or4ports == 2) && (((__u16) port->number - (__u16) (minor)) != 0)) { usb_fill_bulk_urb(ATEN2011_port->read_urb, serial->dev, usb_rcvbulkpipe(serial->dev, (port-> bulk_in_endpointAddress + 2)), port->bulk_in_buffer, ATEN2011_port->read_urb-> transfer_buffer_length, ATEN2011_bulk_in_callback, ATEN2011_port); } else usb_fill_bulk_urb(ATEN2011_port->read_urb, serial->dev, usb_rcvbulkpipe(serial->dev, port-> bulk_in_endpointAddress), port->bulk_in_buffer, ATEN2011_port->read_urb-> transfer_buffer_length, ATEN2011_bulk_in_callback, ATEN2011_port); dbg("ATEN2011_open: bulkin endpoint is %d", port->bulk_in_endpointAddress); response = usb_submit_urb(ATEN2011_port->read_urb, GFP_KERNEL); if (response) { err("%s - Error %d submitting control urb", __func__, response); } /* initialize our wait queues */ init_waitqueue_head(&ATEN2011_port->wait_chase); init_waitqueue_head(&ATEN2011_port->wait_command); /* initialize our icount structure */ memset(&(ATEN2011_port->icount), 0x00, sizeof(ATEN2011_port->icount)); /* initialize our port settings */ ATEN2011_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */ ATEN2011_port->chaseResponsePending = 0; /* send a open port command */ ATEN2011_port->open = 1; /* ATEN2011_change_port_settings(ATEN2011_port,old_termios); */ /* Setup termios */ ATEN2011_set_termios(tty, port, &tmp_termios); ATEN2011_port->icount.tx = 0; ATEN2011_port->icount.rx = 0; dbg("usb_serial serial:%x ATEN2011_port:%x\nATEN2011_serial:%x usb_serial_port port:%x", (unsigned int)serial, (unsigned int)ATEN2011_port, (unsigned int)ATEN2011_serial, (unsigned int)port); return 0; } static int ATEN2011_chars_in_buffer(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; int i; int chars = 0; struct ATENINTL_port *ATEN2011_port; /* dbg("%s"," ATEN2011_chars_in_buffer:entering ..........."); */ ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) { dbg("%s", "ATEN2011_break:leaving ..........."); return -1; } for (i = 0; i < NUM_URBS; ++i) if (ATEN2011_port->write_urb_pool[i]->status == -EINPROGRESS) chars += URB_TRANSFER_BUFFER_SIZE; dbg("%s - returns %d", __func__, chars); return chars; } static void ATEN2011_block_until_tx_empty(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port) { int timeout = HZ / 10; int wait = 30; int count; while (1) { count = ATEN2011_chars_in_buffer(tty); /* Check for Buffer status */ if (count <= 0) return; /* Block the thread for a while */ interruptible_sleep_on_timeout(&ATEN2011_port->wait_chase, timeout); /* No activity.. count down section */ wait--; if (wait == 0) { dbg("%s - TIMEOUT", __func__); return; } else { /* Reset timout value back to seconds */ wait = 30; } } } static void ATEN2011_close(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) { struct usb_serial *serial; struct ATENINTL_serial *ATEN2011_serial; struct ATENINTL_port *ATEN2011_port; int no_urbs; __u16 Data; dbg("%s", "ATEN2011_close:entering..."); serial = port->serial; /* take the Adpater and port's private data */ ATEN2011_serial = usb_get_serial_data(serial); ATEN2011_port = usb_get_serial_port_data(port); if ((ATEN2011_serial == NULL) || (ATEN2011_port == NULL)) return; if (serial->dev) { /* flush and block(wait) until tx is empty */ ATEN2011_block_until_tx_empty(tty, ATEN2011_port); } /* kill the ports URB's */ for (no_urbs = 0; no_urbs < NUM_URBS; no_urbs++) usb_kill_urb(ATEN2011_port->write_urb_pool[no_urbs]); /* Freeing Write URBs */ for (no_urbs = 0; no_urbs < NUM_URBS; ++no_urbs) { kfree(ATEN2011_port->write_urb_pool[no_urbs]->transfer_buffer); usb_free_urb(ATEN2011_port->write_urb_pool[no_urbs]); } /* While closing port, shutdown all bulk read, write * * and interrupt read if they exists */ if (serial->dev) { if (ATEN2011_port->write_urb) { dbg("%s", "Shutdown bulk write"); usb_kill_urb(ATEN2011_port->write_urb); } if (ATEN2011_port->read_urb) { dbg("%s", "Shutdown bulk read"); usb_kill_urb(ATEN2011_port->read_urb); } if ((&ATEN2011_port->control_urb)) { dbg("%s", "Shutdown control read"); /* usb_kill_urb (ATEN2011_port->control_urb); */ } } /* if(ATEN2011_port->ctrl_buf != NULL) */ /* kfree(ATEN2011_port->ctrl_buf); */ /* decrement the no.of open ports counter of an individual USB-serial adapter. */ ATEN2011_serial->NoOfOpenPorts--; dbg("NoOfOpenPorts in close%d:in port%d", ATEN2011_serial->NoOfOpenPorts, port->number); if (ATEN2011_serial->NoOfOpenPorts == 0) { /* stop the stus polling here */ ATEN2011_serial->status_polling_started = 0; if (ATEN2011_serial->interrupt_read_urb) { dbg("%s", "Shutdown interrupt_read_urb"); /* ATEN2011_serial->interrupt_in_buffer=NULL; */ /* usb_kill_urb (ATEN2011_serial->interrupt_read_urb); */ } } if (ATEN2011_port->write_urb) { /* if this urb had a transfer buffer already (old tx) free it */ kfree(ATEN2011_port->write_urb->transfer_buffer); usb_free_urb(ATEN2011_port->write_urb); } /* clear the MCR & IER */ Data = 0x00; set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); Data = 0x00; set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); ATEN2011_port->open = 0; dbg("%s", "Leaving ............"); } static void ATEN2011_block_until_chase_response(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port) { int timeout = 1 * HZ; int wait = 10; int count; while (1) { count = ATEN2011_chars_in_buffer(tty); /* Check for Buffer status */ if (count <= 0) { ATEN2011_port->chaseResponsePending = 0; return; } /* Block the thread for a while */ interruptible_sleep_on_timeout(&ATEN2011_port->wait_chase, timeout); /* No activity.. count down section */ wait--; if (wait == 0) { dbg("%s - TIMEOUT", __func__); return; } else { /* Reset timout value back to seconds */ wait = 10; } } } static void ATEN2011_break(struct tty_struct *tty, int break_state) { struct usb_serial_port *port = tty->driver_data; unsigned char data; struct usb_serial *serial; struct ATENINTL_serial *ATEN2011_serial; struct ATENINTL_port *ATEN2011_port; dbg("%s", "Entering ..........."); dbg("ATEN2011_break: Start"); serial = port->serial; ATEN2011_serial = usb_get_serial_data(serial); ATEN2011_port = usb_get_serial_port_data(port); if ((ATEN2011_serial == NULL) || (ATEN2011_port == NULL)) return; /* flush and chase */ ATEN2011_port->chaseResponsePending = 1; if (serial->dev) { /* flush and block until tx is empty */ ATEN2011_block_until_chase_response(tty, ATEN2011_port); } if (break_state == -1) data = ATEN2011_port->shadowLCR | LCR_SET_BREAK; else data = ATEN2011_port->shadowLCR & ~LCR_SET_BREAK; ATEN2011_port->shadowLCR = data; dbg("ATEN2011_break ATEN2011_port->shadowLCR is %x", ATEN2011_port->shadowLCR); set_uart_reg(port, LINE_CONTROL_REGISTER, ATEN2011_port->shadowLCR); return; } static int ATEN2011_write_room(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; int i; int room = 0; struct ATENINTL_port *ATEN2011_port; ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) { dbg("%s", "ATEN2011_break:leaving ..........."); return -1; } for (i = 0; i < NUM_URBS; ++i) if (ATEN2011_port->write_urb_pool[i]->status != -EINPROGRESS) room += URB_TRANSFER_BUFFER_SIZE; dbg("%s - returns %d", __func__, room); return room; } static int ATEN2011_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *data, int count) { int status; int i; int bytes_sent = 0; int transfer_size; int minor; struct ATENINTL_port *ATEN2011_port; struct usb_serial *serial; struct ATENINTL_serial *ATEN2011_serial; struct urb *urb; const unsigned char *current_position = data; unsigned char *data1; dbg("%s", "entering ..........."); serial = port->serial; ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) { dbg("%s", "ATEN2011_port is NULL"); return -1; } ATEN2011_serial = usb_get_serial_data(serial); if (ATEN2011_serial == NULL) { dbg("%s", "ATEN2011_serial is NULL"); return -1; } /* try to find a free urb in the list */ urb = NULL; for (i = 0; i < NUM_URBS; ++i) { if (ATEN2011_port->write_urb_pool[i]->status != -EINPROGRESS) { urb = ATEN2011_port->write_urb_pool[i]; dbg("URB:%d", i); break; } } if (urb == NULL) { dbg("%s - no more free urbs", __func__); goto exit; } if (urb->transfer_buffer == NULL) { urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); if (urb->transfer_buffer == NULL) { err("%s no more kernel memory...", __func__); goto exit; } } transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); memcpy(urb->transfer_buffer, current_position, transfer_size); /* usb_serial_debug_data (__FILE__, __func__, transfer_size, urb->transfer_buffer); */ /* fill urb with data and submit */ minor = port->serial->minor; if (minor == SERIAL_TTY_NO_MINOR) minor = 0; if ((ATEN2011_serial->ATEN2011_spectrum_2or4ports == 2) && (((__u16) port->number - (__u16) (minor)) != 0)) { usb_fill_bulk_urb(urb, ATEN2011_serial->serial->dev, usb_sndbulkpipe(ATEN2011_serial->serial->dev, (port-> bulk_out_endpointAddress) + 2), urb->transfer_buffer, transfer_size, ATEN2011_bulk_out_data_callback, ATEN2011_port); } else usb_fill_bulk_urb(urb, ATEN2011_serial->serial->dev, usb_sndbulkpipe(ATEN2011_serial->serial->dev, port-> bulk_out_endpointAddress), urb->transfer_buffer, transfer_size, ATEN2011_bulk_out_data_callback, ATEN2011_port); data1 = urb->transfer_buffer; dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); /* for(i=0;i < urb->actual_length;i++) */ /* dbg("Data is %c ",data1[i]); */ /* send it down the pipe */ status = usb_submit_urb(urb, GFP_ATOMIC); if (status) { err("%s - usb_submit_urb(write bulk) failed with status = %d", __func__, status); bytes_sent = status; goto exit; } bytes_sent = transfer_size; ATEN2011_port->icount.tx += transfer_size; dbg("ATEN2011_port->icount.tx is %d:", ATEN2011_port->icount.tx); exit: return bytes_sent; } static void ATEN2011_throttle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct ATENINTL_port *ATEN2011_port; int status; dbg("- port %d", port->number); ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) return; if (!ATEN2011_port->open) { dbg("%s", "port not opened"); return; } dbg("%s", "Entering .......... "); if (!tty) { dbg("%s - no tty available", __func__); return; } /* if we are implementing XON/XOFF, send the stop character */ if (I_IXOFF(tty)) { unsigned char stop_char = STOP_CHAR(tty); status = ATEN2011_write(tty, port, &stop_char, 1); if (status <= 0) return; } /* if we are implementing RTS/CTS, toggle that line */ if (tty->termios->c_cflag & CRTSCTS) { ATEN2011_port->shadowMCR &= ~MCR_RTS; status = set_uart_reg(port, MODEM_CONTROL_REGISTER, ATEN2011_port->shadowMCR); if (status < 0) return; } return; } static void ATEN2011_unthrottle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; int status; struct ATENINTL_port *ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) return; if (!ATEN2011_port->open) { dbg("%s - port not opened", __func__); return; } dbg("%s", "Entering .......... "); if (!tty) { dbg("%s - no tty available", __func__); return; } /* if we are implementing XON/XOFF, send the start character */ if (I_IXOFF(tty)) { unsigned char start_char = START_CHAR(tty); status = ATEN2011_write(tty, port, &start_char, 1); if (status <= 0) return; } /* if we are implementing RTS/CTS, toggle that line */ if (tty->termios->c_cflag & CRTSCTS) { ATEN2011_port->shadowMCR |= MCR_RTS; status = set_uart_reg(port, MODEM_CONTROL_REGISTER, ATEN2011_port->shadowMCR); if (status < 0) return; } return; } static int ATEN2011_tiocmget(struct tty_struct *tty, struct file *file) { struct usb_serial_port *port = tty->driver_data; struct ATENINTL_port *ATEN2011_port; unsigned int result; __u16 msr; __u16 mcr; /* unsigned int mcr; */ int status = 0; ATEN2011_port = usb_get_serial_port_data(port); dbg("%s - port %d", __func__, port->number); if (ATEN2011_port == NULL) return -ENODEV; status = get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); status = get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); /* mcr = ATEN2011_port->shadowMCR; */ /* COMMENT2: the Fallowing three line are commented for updating only MSR values */ result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) | ((msr & ATEN2011_MSR_CTS) ? TIOCM_CTS : 0) | ((msr & ATEN2011_MSR_CD) ? TIOCM_CAR : 0) | ((msr & ATEN2011_MSR_RI) ? TIOCM_RI : 0) | ((msr & ATEN2011_MSR_DSR) ? TIOCM_DSR : 0); dbg("%s - 0x%04X", __func__, result); return result; } static int ATEN2011_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { struct usb_serial_port *port = tty->driver_data; struct ATENINTL_port *ATEN2011_port; unsigned int mcr; unsigned int status; dbg("%s - port %d", __func__, port->number); ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) return -ENODEV; mcr = ATEN2011_port->shadowMCR; if (clear & TIOCM_RTS) mcr &= ~MCR_RTS; if (clear & TIOCM_DTR) mcr &= ~MCR_DTR; if (clear & TIOCM_LOOP) mcr &= ~MCR_LOOPBACK; if (set & TIOCM_RTS) mcr |= MCR_RTS; if (set & TIOCM_DTR) mcr |= MCR_DTR; if (set & TIOCM_LOOP) mcr |= MCR_LOOPBACK; ATEN2011_port->shadowMCR = mcr; status = set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); if (status < 0) { dbg("setting MODEM_CONTROL_REGISTER Failed"); return -1; } return 0; } static void ATEN2011_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { int status; unsigned int cflag; struct usb_serial *serial; struct ATENINTL_port *ATEN2011_port; dbg("ATEN2011_set_termios: START"); serial = port->serial; ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) return; if (!ATEN2011_port->open) { dbg("%s - port not opened", __func__); return; } dbg("%s", "setting termios - "); cflag = tty->termios->c_cflag; dbg("%s - cflag %08x iflag %08x", __func__, tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); if (old_termios) { dbg("%s - old clfag %08x old iflag %08x", __func__, old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); } dbg("%s - port %d", __func__, port->number); /* change the port settings to the new ones specified */ ATEN2011_change_port_settings(tty, ATEN2011_port, old_termios); if (!ATEN2011_port->read_urb) { dbg("%s", "URB KILLED !!!!!"); return; } if (ATEN2011_port->read_urb->status != -EINPROGRESS) { ATEN2011_port->read_urb->dev = serial->dev; status = usb_submit_urb(ATEN2011_port->read_urb, GFP_ATOMIC); if (status) { dbg (" usb_submit_urb(read bulk) failed, status = %d", status); } } return; } static int get_lsr_info(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, unsigned int __user *value) { int count; unsigned int result = 0; count = ATEN2011_chars_in_buffer(tty); if (count == 0) { dbg("%s -- Empty", __func__); result = TIOCSER_TEMT; } if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return 0; } static int get_number_bytes_avail(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, unsigned int __user *value) { unsigned int result = 0; if (!tty) return -ENOIOCTLCMD; result = tty->read_cnt; dbg("%s(%d) = %d", __func__, ATEN2011_port->port->number, result); if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return -ENOIOCTLCMD; } static int set_modem_info(struct ATENINTL_port *ATEN2011_port, unsigned int cmd, unsigned int __user *value) { unsigned int mcr; unsigned int arg; __u16 Data; int status; struct usb_serial_port *port; if (ATEN2011_port == NULL) return -1; port = (struct usb_serial_port *)ATEN2011_port->port; mcr = ATEN2011_port->shadowMCR; if (copy_from_user(&arg, value, sizeof(int))) return -EFAULT; switch (cmd) { case TIOCMBIS: if (arg & TIOCM_RTS) mcr |= MCR_RTS; if (arg & TIOCM_DTR) mcr |= MCR_RTS; if (arg & TIOCM_LOOP) mcr |= MCR_LOOPBACK; break; case TIOCMBIC: if (arg & TIOCM_RTS) mcr &= ~MCR_RTS; if (arg & TIOCM_DTR) mcr &= ~MCR_RTS; if (arg & TIOCM_LOOP) mcr &= ~MCR_LOOPBACK; break; case TIOCMSET: /* turn off the RTS and DTR and LOOPBACK * and then only turn on what was asked to */ mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); break; } ATEN2011_port->shadowMCR = mcr; Data = ATEN2011_port->shadowMCR; status = set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); if (status < 0) { dbg("setting MODEM_CONTROL_REGISTER Failed"); return -1; } return 0; } static int get_modem_info(struct ATENINTL_port *ATEN2011_port, unsigned int __user *value) { unsigned int result = 0; __u16 msr; unsigned int mcr = ATEN2011_port->shadowMCR; int status; status = get_uart_reg(ATEN2011_port->port, MODEM_STATUS_REGISTER, &msr); result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ |((msr & ATEN2011_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ |((msr & ATEN2011_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ |((msr & ATEN2011_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ |((msr & ATEN2011_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ dbg("%s -- %x", __func__, result); if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return 0; } static int get_serial_info(struct ATENINTL_port *ATEN2011_port, struct serial_struct __user *retinfo) { struct serial_struct tmp; if (ATEN2011_port == NULL) return -1; if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); tmp.type = PORT_16550A; tmp.line = ATEN2011_port->port->serial->minor; if (tmp.line == SERIAL_TTY_NO_MINOR) tmp.line = 0; tmp.port = ATEN2011_port->port->number; tmp.irq = 0; tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; tmp.baud_base = 9600; tmp.close_delay = 5 * HZ; tmp.closing_wait = 30 * HZ; if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) return -EFAULT; return 0; } static int ATEN2011_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { struct usb_serial_port *port = tty->driver_data; struct ATENINTL_port *ATEN2011_port; struct async_icount cnow; struct async_icount cprev; struct serial_icounter_struct icount; int ATENret = 0; unsigned int __user *user_arg = (unsigned int __user *)arg; ATEN2011_port = usb_get_serial_port_data(port); if (ATEN2011_port == NULL) return -1; dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); switch (cmd) { /* return number of bytes available */ case TIOCINQ: dbg("%s (%d) TIOCINQ", __func__, port->number); return get_number_bytes_avail(tty, ATEN2011_port, user_arg); break; case TIOCOUTQ: dbg("%s (%d) TIOCOUTQ", __func__, port->number); return put_user(ATEN2011_chars_in_buffer(tty), user_arg); break; case TIOCSERGETLSR: dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); return get_lsr_info(tty, ATEN2011_port, user_arg); return 0; case TIOCMBIS: case TIOCMBIC: case TIOCMSET: dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__, port->number); ATENret = set_modem_info(ATEN2011_port, cmd, user_arg); return ATENret; case TIOCMGET: dbg("%s (%d) TIOCMGET", __func__, port->number); return get_modem_info(ATEN2011_port, user_arg); case TIOCGSERIAL: dbg("%s (%d) TIOCGSERIAL", __func__, port->number); return get_serial_info(ATEN2011_port, (struct serial_struct __user *)arg); case TIOCSSERIAL: dbg("%s (%d) TIOCSSERIAL", __func__, port->number); break; case TIOCMIWAIT: dbg("%s (%d) TIOCMIWAIT", __func__, port->number); cprev = ATEN2011_port->icount; while (1) { /* see if a signal did it */ if (signal_pending(current)) return -ERESTARTSYS; cnow = ATEN2011_port->icount; if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) return -EIO; /* no change => error */ if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { return 0; } cprev = cnow; } /* NOTREACHED */ break; case TIOCGICOUNT: cnow = ATEN2011_port->icount; 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; dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, port->number, icount.rx, icount.tx); if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) return -EFAULT; return 0; default: break; } return -ENOIOCTLCMD; } static int ATEN2011_calc_baud_rate_divisor(int baudRate, int *divisor, __u16 *clk_sel_val) { dbg("%s - %d", __func__, baudRate); if (baudRate <= 115200) { *divisor = 115200 / baudRate; *clk_sel_val = 0x0; } if ((baudRate > 115200) && (baudRate <= 230400)) { *divisor = 230400 / baudRate; *clk_sel_val = 0x10; } else if ((baudRate > 230400) && (baudRate <= 403200)) { *divisor = 403200 / baudRate; *clk_sel_val = 0x20; } else if ((baudRate > 403200) && (baudRate <= 460800)) { *divisor = 460800 / baudRate; *clk_sel_val = 0x30; } else if ((baudRate > 460800) && (baudRate <= 806400)) { *divisor = 806400 / baudRate; *clk_sel_val = 0x40; } else if ((baudRate > 806400) && (baudRate <= 921600)) { *divisor = 921600 / baudRate; *clk_sel_val = 0x50; } else if ((baudRate > 921600) && (baudRate <= 1572864)) { *divisor = 1572864 / baudRate; *clk_sel_val = 0x60; } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { *divisor = 3145728 / baudRate; *clk_sel_val = 0x70; } return 0; } static int ATEN2011_send_cmd_write_baud_rate(struct ATENINTL_port *ATEN2011_port, int baudRate) { int divisor = 0; int status; __u16 Data; unsigned char number; __u16 clk_sel_val; struct usb_serial_port *port; int minor; if (ATEN2011_port == NULL) return -1; port = (struct usb_serial_port *)ATEN2011_port->port; dbg("%s", "Entering .......... "); minor = ATEN2011_port->port->serial->minor; if (minor == SERIAL_TTY_NO_MINOR) minor = 0; number = ATEN2011_port->port->number - minor; dbg("%s - port = %d, baud = %d", __func__, ATEN2011_port->port->number, baudRate); /* reset clk_uart_sel in spregOffset */ if (baudRate > 115200) { #ifdef HW_flow_control /* * NOTE: need to see the pther register to modify * setting h/w flow control bit to 1; */ /* Data = ATEN2011_port->shadowMCR; */ Data = 0x2b; ATEN2011_port->shadowMCR = Data; status = set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); if (status < 0) { dbg("Writing spreg failed in set_serial_baud"); return -1; } #endif } else { #ifdef HW_flow_control /* setting h/w flow control bit to 0; */ /* Data = ATEN2011_port->shadowMCR; */ Data = 0xb; ATEN2011_port->shadowMCR = Data; status = set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); if (status < 0) { dbg("Writing spreg failed in set_serial_baud"); return -1; } #endif } if (1) /* baudRate <= 115200) */ { clk_sel_val = 0x0; Data = 0x0; status = ATEN2011_calc_baud_rate_divisor(baudRate, &divisor, &clk_sel_val); status = get_reg_sync(port, ATEN2011_port->SpRegOffset, &Data); if (status < 0) { dbg("reading spreg failed in set_serial_baud"); return -1; } Data = (Data & 0x8f) | clk_sel_val; status = set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); if (status < 0) { dbg("Writing spreg failed in set_serial_baud"); return -1; } /* Calculate the Divisor */ if (status) { err("%s - bad baud rate", __func__); dbg("%s", "bad baud rate"); return status; } /* Enable access to divisor latch */ Data = ATEN2011_port->shadowLCR | SERIAL_LCR_DLAB; ATEN2011_port->shadowLCR = Data; set_uart_reg(port, LINE_CONTROL_REGISTER, Data); /* Write the divisor */ Data = (unsigned char)(divisor & 0xff); dbg("set_serial_baud Value to write DLL is %x", Data); set_uart_reg(port, DIVISOR_LATCH_LSB, Data); Data = (unsigned char)((divisor & 0xff00) >> 8); dbg("set_serial_baud Value to write DLM is %x", Data); set_uart_reg(port, DIVISOR_LATCH_MSB, Data); /* Disable access to divisor latch */ Data = ATEN2011_port->shadowLCR & ~SERIAL_LCR_DLAB; ATEN2011_port->shadowLCR = Data; set_uart_reg(port, LINE_CONTROL_REGISTER, Data); } return status; } static void ATEN2011_change_port_settings(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios) { int baud; unsigned cflag; unsigned iflag; __u8 lData; __u8 lParity; __u8 lStop; int status; __u16 Data; struct usb_serial_port *port; struct usb_serial *serial; if (ATEN2011_port == NULL) return; port = (struct usb_serial_port *)ATEN2011_port->port; serial = port->serial; dbg("%s - port %d", __func__, ATEN2011_port->port->number); if (!ATEN2011_port->open) { dbg("%s - port not opened", __func__); return; } if ((!tty) || (!tty->termios)) { dbg("%s - no tty structures", __func__); return; } dbg("%s", "Entering .......... "); lData = LCR_BITS_8; lStop = LCR_STOP_1; lParity = LCR_PAR_NONE; cflag = tty->termios->c_cflag; iflag = tty->termios->c_iflag; /* Change the number of bits */ /* COMMENT1: the below Line"if(cflag & CSIZE)" is added for the errors we get for serial loop data test i.e serial_loopback.pl -v */ /* if(cflag & CSIZE) */ { switch (cflag & CSIZE) { case CS5: lData = LCR_BITS_5; break; case CS6: lData = LCR_BITS_6; break; case CS7: lData = LCR_BITS_7; break; default: case CS8: lData = LCR_BITS_8; break; } } /* Change the Parity bit */ if (cflag & PARENB) { if (cflag & PARODD) { lParity = LCR_PAR_ODD; dbg("%s - parity = odd", __func__); } else { lParity = LCR_PAR_EVEN; dbg("%s - parity = even", __func__); } } else { dbg("%s - parity = none", __func__); } if (cflag & CMSPAR) lParity = lParity | 0x20; /* Change the Stop bit */ if (cflag & CSTOPB) { lStop = LCR_STOP_2; dbg("%s - stop bits = 2", __func__); } else { lStop = LCR_STOP_1; dbg("%s - stop bits = 1", __func__); } /* Update the LCR with the correct value */ ATEN2011_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); ATEN2011_port->shadowLCR |= (lData | lParity | lStop); dbg ("ATEN2011_change_port_settings ATEN2011_port->shadowLCR is %x", ATEN2011_port->shadowLCR); /* Disable Interrupts */ Data = 0x00; set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); Data = 0x00; set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); Data = 0xcf; set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); /* Send the updated LCR value to the ATEN2011 */ Data = ATEN2011_port->shadowLCR; set_uart_reg(port, LINE_CONTROL_REGISTER, Data); Data = 0x00b; ATEN2011_port->shadowMCR = Data; set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); Data = 0x00b; set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); /* set up the MCR register and send it to the ATEN2011 */ ATEN2011_port->shadowMCR = MCR_MASTER_IE; if (cflag & CBAUD) ATEN2011_port->shadowMCR |= (MCR_DTR | MCR_RTS); if (cflag & CRTSCTS) ATEN2011_port->shadowMCR |= (MCR_XON_ANY); else ATEN2011_port->shadowMCR &= ~(MCR_XON_ANY); Data = ATEN2011_port->shadowMCR; set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); /* Determine divisor based on baud rate */ baud = tty_get_baud_rate(tty); if (!baud) { /* pick a default, any default... */ dbg("%s", "Picked default baud..."); baud = 9600; } dbg("%s - baud rate = %d", __func__, baud); status = ATEN2011_send_cmd_write_baud_rate(ATEN2011_port, baud); /* Enable Interrupts */ Data = 0x0c; set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); if (ATEN2011_port->read_urb->status != -EINPROGRESS) { ATEN2011_port->read_urb->dev = serial->dev; status = usb_submit_urb(ATEN2011_port->read_urb, GFP_ATOMIC); if (status) { dbg (" usb_submit_urb(read bulk) failed, status = %d", status); } } dbg ("ATEN2011_change_port_settings ATEN2011_port->shadowLCR is End %x", ATEN2011_port->shadowLCR); return; } static int ATEN2011_calc_num_ports(struct usb_serial *serial) { __u16 Data = 0x00; int ret = 0; int ATEN2011_2or4ports; ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), ATEN_RDREQ, ATEN_RD_RTYPE, 0, GPIO_REGISTER, &Data, VENDOR_READ_LENGTH, ATEN_WDR_TIMEOUT); /* ghostgum: here is where the problem appears to bet */ /* Which of the following are needed? */ /* Greg used the serial->type->num_ports=2 */ /* But the code in the ATEN2011_open relies on serial->num_ports=2 */ if ((Data & 0x01) == 0) { ATEN2011_2or4ports = 2; serial->type->num_ports = 2; serial->num_ports = 2; } /* else if(serial->interface->cur_altsetting->desc.bNumEndpoints == 9) */ else { ATEN2011_2or4ports = 4; serial->type->num_ports = 4; serial->num_ports = 4; } return ATEN2011_2or4ports; } static int ATEN2011_startup(struct usb_serial *serial) { struct ATENINTL_serial *ATEN2011_serial; struct ATENINTL_port *ATEN2011_port; struct usb_device *dev; int i, status; int minor; __u16 Data; dbg("%s", " ATEN2011_startup :entering.........."); if (!serial) { dbg("%s", "Invalid Handler"); return -1; } dev = serial->dev; dbg("%s", "Entering..."); /* create our private serial structure */ ATEN2011_serial = kzalloc(sizeof(struct ATENINTL_serial), GFP_KERNEL); if (ATEN2011_serial == NULL) { err("%s - Out of memory", __func__); return -ENOMEM; } /* resetting the private structure field values to zero */ memset(ATEN2011_serial, 0, sizeof(struct ATENINTL_serial)); ATEN2011_serial->serial = serial; /* initilize status polling flag to 0 */ ATEN2011_serial->status_polling_started = 0; usb_set_serial_data(serial, ATEN2011_serial); ATEN2011_serial->ATEN2011_spectrum_2or4ports = ATEN2011_calc_num_ports(serial); /* we set up the pointers to the endpoints in the ATEN2011_open * * function, as the structures aren't created yet. */ /* set up port private structures */ for (i = 0; i < serial->num_ports; ++i) { ATEN2011_port = kmalloc(sizeof(struct ATENINTL_port), GFP_KERNEL); if (ATEN2011_port == NULL) { err("%s - Out of memory", __func__); usb_set_serial_data(serial, NULL); kfree(ATEN2011_serial); return -ENOMEM; } memset(ATEN2011_port, 0, sizeof(struct ATENINTL_port)); /* * Initialize all port interrupt end point to port 0 * int endpoint. Our device has only one interrupt end point * comman to all port */ /* serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress; */ ATEN2011_port->port = serial->port[i]; usb_set_serial_port_data(serial->port[i], ATEN2011_port); minor = serial->port[i]->serial->minor; if (minor == SERIAL_TTY_NO_MINOR) minor = 0; ATEN2011_port->port_num = ((serial->port[i]->number - minor) + 1); if (ATEN2011_port->port_num == 1) { ATEN2011_port->SpRegOffset = 0x0; ATEN2011_port->ControlRegOffset = 0x1; ATEN2011_port->DcrRegOffset = 0x4; } else if ((ATEN2011_port->port_num == 2) && (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 4)) { ATEN2011_port->SpRegOffset = 0x8; ATEN2011_port->ControlRegOffset = 0x9; ATEN2011_port->DcrRegOffset = 0x16; } else if ((ATEN2011_port->port_num == 2) && (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 2)) { ATEN2011_port->SpRegOffset = 0xa; ATEN2011_port->ControlRegOffset = 0xb; ATEN2011_port->DcrRegOffset = 0x19; } else if ((ATEN2011_port->port_num == 3) && (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 4)) { ATEN2011_port->SpRegOffset = 0xa; ATEN2011_port->ControlRegOffset = 0xb; ATEN2011_port->DcrRegOffset = 0x19; } else if ((ATEN2011_port->port_num == 4) && (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 4)) { ATEN2011_port->SpRegOffset = 0xc; ATEN2011_port->ControlRegOffset = 0xd; ATEN2011_port->DcrRegOffset = 0x1c; } usb_set_serial_port_data(serial->port[i], ATEN2011_port); /* enable rx_disable bit in control register */ status = get_reg_sync(serial->port[i], ATEN2011_port->ControlRegOffset, &Data); if (status < 0) { dbg("Reading ControlReg failed status-0x%x", status); break; } else dbg ("ControlReg Reading success val is %x, status%d", Data, status); Data |= 0x08; /* setting driver done bit */ Data |= 0x04; /* sp1_bit to have cts change reflect in modem status reg */ /* Data |= 0x20; */ /* rx_disable bit */ status = set_reg_sync(serial->port[i], ATEN2011_port->ControlRegOffset, Data); if (status < 0) { dbg ("Writing ControlReg failed(rx_disable) status-0x%x", status); break; } else dbg ("ControlReg Writing success(rx_disable) status%d", status); /* * Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 * and 0x24 in DCR3 */ Data = 0x01; status = set_reg_sync(serial->port[i], (__u16)(ATEN2011_port->DcrRegOffset + 0), Data); if (status < 0) { dbg("Writing DCR0 failed status-0x%x", status); break; } else dbg("DCR0 Writing success status%d", status); Data = 0x05; status = set_reg_sync(serial->port[i], (__u16)(ATEN2011_port->DcrRegOffset + 1), Data); if (status < 0) { dbg("Writing DCR1 failed status-0x%x", status); break; } else dbg("DCR1 Writing success status%d", status); Data = 0x24; status = set_reg_sync(serial->port[i], (__u16)(ATEN2011_port->DcrRegOffset + 2), Data); if (status < 0) { dbg("Writing DCR2 failed status-0x%x", status); break; } else dbg("DCR2 Writing success status%d", status); /* write values in clkstart0x0 and clkmulti 0x20 */ Data = 0x0; status = set_reg_sync(serial->port[i], CLK_START_VALUE_REGISTER, Data); if (status < 0) { dbg ("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); break; } else dbg ("CLK_START_VALUE_REGISTER Writing success status%d", status); Data = 0x20; status = set_reg_sync(serial->port[i], CLK_MULTI_REGISTER, Data); if (status < 0) { dbg ("Writing CLK_MULTI_REGISTER failed status-0x%x", status); break; } else dbg("CLK_MULTI_REGISTER Writing success status%d", status); /* Zero Length flag register */ if ((ATEN2011_port->port_num != 1) && (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 2)) { Data = 0xff; status = set_reg_sync(serial->port[i], (__u16)(ZLP_REG1 + ((__u16)ATEN2011_port->port_num)), Data); dbg("ZLIP offset%x", (__u16) (ZLP_REG1 + ((__u16) ATEN2011_port->port_num))); if (status < 0) { dbg ("Writing ZLP_REG%d failed status-0x%x", i + 2, status); break; } else dbg("ZLP_REG%d Writing success status%d", i + 2, status); } else { Data = 0xff; status = set_reg_sync(serial->port[i], (__u16)(ZLP_REG1 + ((__u16)ATEN2011_port->port_num) - 0x1), Data); dbg("ZLIP offset%x", (__u16) (ZLP_REG1 + ((__u16) ATEN2011_port->port_num) - 0x1)); if (status < 0) { dbg ("Writing ZLP_REG%d failed status-0x%x", i + 1, status); break; } else dbg("ZLP_REG%d Writing success status%d", i + 1, status); } ATEN2011_port->control_urb = usb_alloc_urb(0, GFP_ATOMIC); ATEN2011_port->ctrl_buf = kmalloc(16, GFP_KERNEL); } /* Zero Length flag enable */ Data = 0x0f; status = set_reg_sync(serial->port[0], ZLP_REG5, Data); if (status < 0) { dbg("Writing ZLP_REG5 failed status-0x%x", status); return -1; } else dbg("ZLP_REG5 Writing success status%d", status); /* setting configuration feature to one */ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); return 0; } static void ATEN2011_release(struct usb_serial *serial) { int i; struct ATENINTL_port *ATEN2011_port; /* check for the ports to be closed,close the ports and disconnect */ /* free private structure allocated for serial port * * stop reads and writes on all ports */ for (i = 0; i < serial->num_ports; ++i) { ATEN2011_port = usb_get_serial_port_data(serial->port[i]); kfree(ATEN2011_port->ctrl_buf); usb_kill_urb(ATEN2011_port->control_urb); kfree(ATEN2011_port); usb_set_serial_port_data(serial->port[i], NULL); } /* free private structure allocated for serial device */ kfree(usb_get_serial_data(serial)); usb_set_serial_data(serial, NULL); } static struct usb_serial_driver aten_serial_driver = { .driver = { .owner = THIS_MODULE, .name = "aten2011", }, .description = DRIVER_DESC, .id_table = id_table, .open = ATEN2011_open, .close = ATEN2011_close, .write = ATEN2011_write, .write_room = ATEN2011_write_room, .chars_in_buffer = ATEN2011_chars_in_buffer, .throttle = ATEN2011_throttle, .unthrottle = ATEN2011_unthrottle, .calc_num_ports = ATEN2011_calc_num_ports, .ioctl = ATEN2011_ioctl, .set_termios = ATEN2011_set_termios, .break_ctl = ATEN2011_break, .tiocmget = ATEN2011_tiocmget, .tiocmset = ATEN2011_tiocmset, .attach = ATEN2011_startup, .release = ATEN2011_release, .read_bulk_callback = ATEN2011_bulk_in_callback, .read_int_callback = ATEN2011_interrupt_callback, }; static struct usb_driver aten_driver = { .name = "aten2011", .probe = usb_serial_probe, .disconnect = usb_serial_disconnect, .id_table = id_table, }; static int __init aten_init(void) { int retval; /* Register with the usb serial */ retval = usb_serial_register(&aten_serial_driver); if (retval) return retval; printk(KERN_INFO KBUILD_MODNAME ":" DRIVER_DESC " " DRIVER_VERSION "\n"); /* Register with the usb */ retval = usb_register(&aten_driver); if (retval) usb_serial_deregister(&aten_serial_driver); return retval; } static void __exit aten_exit(void) { usb_deregister(&aten_driver); usb_serial_deregister(&aten_serial_driver); } module_init(aten_init); module_exit(aten_exit); /* Module information */ MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); MODULE_PARM_DESC(debug, "Debug enabled or not");