/* * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /************************************************************************* *** -------------------------------------------------------------------- *** *** Project Name: ATENINTL *** *** Module Name: ATEN2011 *** *** File: aten2011.c *** *** *** File Revision: 1.2 *** *** Revision Date: 2009-01-16 *** *** *** Purpose : It gives an interface between USB to 4 Serial *** and serves as a Serial Driver for the high *** level layers /applications. *** *** Change History: *** Modified from ATEN revision 1.2 for Linux kernel 2.6.26 or later *** *** LEGEND : *** *** *** DBG - Code inserted due to as part of debugging *** DPRINTK - Debug Print statement *** *************************************************************************/ /* all file inclusion goes here */ #include #include #include #include #include #include #include #include //#include #include //#include #include #include #define KERNEL_2_6 1 #include #define MAX_RS232_PORTS 2 /* Max # of RS-232 ports per device */ #include /* * All typedef goes here */ /* typedefs that the insideout headers need */ #ifndef TRUE #define TRUE (1) #endif #ifndef FALSE #define FALSE (0) #endif #ifndef LOW8 #define LOW8(val) ((unsigned char)(val & 0xff)) #endif #ifndef HIGH8 #define HIGH8(val) ((unsigned char)((val & 0xff00) >> 8)) #endif #ifndef NUM_ENTRIES #define NUM_ENTRIES(x) (sizeof(x)/sizeof((x)[0])) #endif #define MAX_SERIALNUMBER_LEN 12 /* The following table is used to map the USBx port number to * the device serial number (or physical USB path), */ #define MAX_ATENPORTS 2 #define MAX_NAME_LEN 64 #define RAID_REG1 0x30 #define RAID_REG2 0x31 #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 #define THRESHOLD_VAL_SP1_1 0x3F #define THRESHOLD_VAL_SP1_2 0x40 #define THRESHOLD_VAL_SP2_1 0x41 #define THRESHOLD_VAL_SP2_2 0x42 #define THRESHOLD_VAL_SP3_1 0x43 #define THRESHOLD_VAL_SP3_2 0x44 #define THRESHOLD_VAL_SP4_1 0x45 #define THRESHOLD_VAL_SP4_2 0x46 /* For higher baud Rates use TIOCEXBAUD */ #define TIOCEXBAUD 0x5462 #define BAUD_1152 0 /* 115200bps * 1 */ #define BAUD_2304 1 /* 230400bps * 2 */ #define BAUD_4032 2 /* 403200bps * 3.5 */ #define BAUD_4608 3 /* 460800bps * 4 */ #define BAUD_8064 4 /* 806400bps * 7 */ #define BAUD_9216 5 /* 921600bps * 8 */ #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ #ifndef SERIAL_MAGIC #define SERIAL_MAGIC 0x6702 #endif #define PORT_MAGIC 0x7301 /* vendor id and device id defines */ #define USB_VENDOR_ID_ATENINTL 0x0557 #define ATENINTL_DEVICE_ID_2011 0x2011 #define ATENINTL_DEVICE_ID_7820 0x7820 /* Product information read from the ATENINTL. Provided for later upgrade */ /* 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_CTS 0x01 #define ATEN_MSR_DSR 0x02 #define ATEN_MSR_RI 0x04 #define ATEN_MSR_CD 0x08 #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 SP_REGISTER_BASE ((__u16)(0x08)) #define CONTROL_REGISTER_BASE ((__u16)(0x09)) #define DCR_REGISTER_BASE ((__u16)(0x16)) #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 CLOCK_SELECT_REG1 ((__u16)(0x13)) #define CLOCK_SELECT_REG2 ((__u16)(0x14)) #define SERIAL_LCR_DLAB ((__u16)(0x0080)) /* * URB POOL related defines */ #define NUM_URBS 16 /* URB Count */ #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ struct ATENINTL_product_info { __u16 ProductId; /* Product Identifier */ __u8 NumPorts; /* Number of ports on ATENINTL */ __u8 ProdInfoVer; /* What version of structure is this? */ __u32 IsServer :1; /* Set if Server */ __u32 IsRS232 :1; /* Set if RS-232 ports exist */ __u32 IsRS422 :1; /* Set if RS-422 ports exist */ __u32 IsRS485 :1; /* Set if RS-485 ports exist */ __u32 IsReserved :28; /* Reserved for later expansion */ __u8 CpuRev; /* CPU revision level (chg only if s/w visible) */ __u8 BoardRev; /* PCB revision level (chg only if s/w visible) */ __u8 ManufactureDescDate[3]; /* MM/DD/YY when descriptor template was compiled */ __u8 Unused1[1]; /* Available */ }; // different USB-serial Adapter's ID's table static struct usb_device_id ATENINTL_port_id_table [] = { { USB_DEVICE(USB_VENDOR_ID_ATENINTL,ATENINTL_DEVICE_ID_2011) }, { USB_DEVICE(USB_VENDOR_ID_ATENINTL,ATENINTL_DEVICE_ID_7820) }, { } /* terminating entry */ }; static __devinitdata struct usb_device_id id_table_combined [] = { { 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_combined); /* 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 */ __s16 rxBytesAvail;/*the number of bytes that we need to read from this device */ __s16 rxBytesRemaining; /* the number of port bytes left to read */ char write_in_progress; /* TRUE while a write URB is outstanding */ __u8 shadowLCR; /* last LCR value received */ __u8 shadowMCR; /* last MCR value received */ __u8 shadowMSR; /* last MSR value received */ __u8 shadowLSR; /* last LSR value received */ __u8 shadowXonChar; /* last value set as XON char in ATENINTL */ __u8 shadowXoffChar; /* last value set as XOFF char in ATENINTL */ __u8 validDataMask; __u32 baudRate; char open; char openPending; char commandPending; char closePending; char chaseResponsePending; wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ int delta_msr_cond; struct async_icount icount; struct usb_serial_port *port; /* loop back to the owner of this object */ /*Offsets*/ __u16 AppNum; __u8 SpRegOffset; __u8 ControlRegOffset; __u8 DcrRegOffset; __u8 ClkSelectRegOffset; //for processing control URBS in interrupt context struct urb *control_urb; // __le16 rx_creg; 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 { char name[MAX_NAME_LEN+1]; /* string name of this device */ struct ATENINTL_product_info product_info; /* Product Info */ __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 */ __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ __u8 rxPort; /* the port that we are currently receiving data for */ __u8 rxStatusCode; /* the receive status code */ __u8 rxStatusParam; /* the receive status paramater */ __s16 rxBytesRemaining; /* the number of port bytes left to read */ 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; }; /* baud rate information */ struct ATEN2011_divisor_table_entry { __u32 BaudRate; __u16 Divisor; }; /* Define table of divisors for ATENINTL 2011 hardware * * These assume a 3.6864MHz crystal, the standard /16, and * * MCR.7 = 0. */ #ifdef NOTATEN2011 static struct ATEN2011_divisor_table_entry ATEN2011_divisor_table[] = { { 50, 2304}, { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ { 150, 768}, { 300, 384}, { 600, 192}, { 1200, 96}, { 1800, 64}, { 2400, 48}, { 4800, 24}, { 7200, 16}, { 9600, 12}, { 19200, 6}, { 38400, 3}, { 57600, 2}, { 115200, 1}, }; #endif /* local function prototypes */ /* function prototypes for all URB callbacks */ static void ATEN2011_interrupt_callback(struct urb *urb); static void ATEN2011_bulk_in_callback(struct urb *urb); static void ATEN2011_bulk_out_data_callback(struct urb *urb); static void ATEN2011_control_callback(struct urb *urb); static int ATEN2011_get_reg(struct ATENINTL_port *ATEN,__u16 Wval, __u16 reg, __u16 * val); int handle_newMsr(struct ATENINTL_port *port,__u8 newMsr); int handle_newLsr(struct ATENINTL_port *port,__u8 newLsr); /* function prototypes for the usbserial callbacks */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int ATEN2011_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp); static void ATEN2011_close(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp); static int ATEN2011_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *data, int count); static int ATEN2011_write_room(struct tty_struct *tty); static int ATEN2011_chars_in_buffer(struct tty_struct *tty); static void ATEN2011_throttle(struct tty_struct *tty); static void ATEN2011_unthrottle(struct tty_struct *tty); static void ATEN2011_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios); static int ATEN2011_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); static int ATEN2011_tiocmget(struct tty_struct *tty, struct file *file); static int ATEN2011_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); static void ATEN2011_break(struct tty_struct *tty, int break_state); #else static int ATEN2011_open(struct usb_serial_port *port, struct file *filp); static void ATEN2011_close(struct usb_serial_port *port, struct file *filp); static int ATEN2011_write(struct usb_serial_port *port, const unsigned char *data, int count); static int ATEN2011_write_room(struct usb_serial_port *port); static int ATEN2011_chars_in_buffer(struct usb_serial_port *port); static void ATEN2011_throttle(struct usb_serial_port *port); static void ATEN2011_unthrottle(struct usb_serial_port *port); static void ATEN2011_set_termios (struct usb_serial_port *port, struct ktermios *old_termios); static int ATEN2011_tiocmset(struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); static int ATEN2011_tiocmget(struct usb_serial_port *port, struct file *file); static int ATEN2011_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); static void ATEN2011_break(struct usb_serial_port *port, int break_state); #endif //static void ATEN2011_break_ctl(struct usb_serial_port *port, int break_state ); static int ATEN2011_startup(struct usb_serial *serial); static void ATEN2011_shutdown(struct usb_serial *serial); //static int ATEN2011_serial_probe(struct usb_serial *serial, const struct usb_device_id *id); static int ATEN2011_calc_num_ports(struct usb_serial *serial); /* function prototypes for all of our local functions */ static int ATEN2011_calc_baud_rate_divisor(int baudRate, int *divisor,__u16 *clk_sel_val); static int ATEN2011_send_cmd_write_baud_rate(struct ATENINTL_port *ATEN2011_port, int baudRate); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_change_port_settings(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios); static void ATEN2011_block_until_chase_response(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port); static void ATEN2011_block_until_tx_empty(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port); #else static void ATEN2011_change_port_settings(struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios); static void ATEN2011_block_until_chase_response(struct ATENINTL_port *ATEN2011_port); static void ATEN2011_block_until_tx_empty(struct ATENINTL_port *ATEN2011_port); #endif int __init ATENINTL2011_init(void); void __exit ATENINTL2011_exit(void); /************************************* * 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 */ /* all defines goes here */ /* * Debug related defines */ /* 1: Enables the debugging -- 0: Disable the debugging */ //#define printk // #define ATEN_DEBUG 0 #ifdef ATEN_DEBUG static int debug = 0; #define DPRINTK(fmt, args...) printk( "%s: " fmt, __FUNCTION__ , ## args) #else static int debug = 0; #define DPRINTK(fmt, args...) #endif //#undef DPRINTK // #define DPRINTK(fmt, args...) /* * Version Information */ #define DRIVER_VERSION "1.3.1" #define DRIVER_DESC "ATENINTL 2011 USB Serial Adapter" /* * Defines used for sending commands to port */ #define WAIT_FOR_EVER (HZ * 0 ) /* timeout urb is wait for ever */ #define ATEN_WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */ #define ATEN_PORT1 0x0200 #define ATEN_PORT2 0x0300 #define ATEN_VENREG 0x0000 #define ATEN_MAX_PORT 0x02 #define ATEN_WRITE 0x0E #define ATEN_READ 0x0D /* 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) int ATEN2011_Thr_cnt; //int ATEN2011_spectrum_2or4ports; //this says the number of ports in the device //int NoOfOpenPorts; int RS485mode = 0; //set to 1 for RS485 mode and 0 for RS232 mode static struct usb_serial *ATEN2011_get_usb_serial(struct usb_serial_port *port, const char *function); static int ATEN2011_serial_paranoia_check(struct usb_serial *serial, const char *function); static int ATEN2011_port_paranoia_check(struct usb_serial_port *port, const char *function); /* setting and get register values */ static int ATEN2011_set_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 val); static int ATEN2011_get_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 * val); static int ATEN2011_set_Uart_Reg(struct usb_serial_port *port, __u16 reg, __u16 val); static int ATEN2011_get_Uart_Reg(struct usb_serial_port *port, __u16 reg, __u16 * val); void ATEN2011_Dump_serial_port(struct ATENINTL_port *ATEN2011_port); /************************************************************************/ /************************************************************************/ /* I N T E R F A C E F U N C T I O N S */ /* I N T E R F A C E F U N C T I O N S */ /************************************************************************/ /************************************************************************/ static inline void ATEN2011_set_serial_private(struct usb_serial *serial, struct ATENINTL_serial *data) { usb_set_serial_data(serial, (void *)data); } static inline struct ATENINTL_serial *ATEN2011_get_serial_private(struct usb_serial *serial) { return (struct ATENINTL_serial *)usb_get_serial_data(serial); } static inline void ATEN2011_set_port_private(struct usb_serial_port *port, struct ATENINTL_port *data) { usb_set_serial_port_data(port, (void *)data); } static inline struct ATENINTL_port *ATEN2011_get_port_private(struct usb_serial_port *port) { return (struct ATENINTL_port *)usb_get_serial_port_data(port); } /* Description:- To set the Control register by calling usb_fill_control_urb function by passing usb_sndctrlpipe function as parameter. Input Parameters: usb_serial_port: Data Structure usb_serialport correponding to that seril port. Reg: Register Address Val: Value to set in the Register. */ static int ATEN2011_set_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 val) { struct usb_device *dev = port->serial->dev; val = val & 0x00ff; DPRINTK("ATEN2011_set_reg_sync offset is %x, value %x\n", reg, val); return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ATEN_WRREQ, ATEN_WR_RTYPE, val, reg, NULL, 0, ATEN_WDR_TIMEOUT); } /* Description:- To set the Uart register by calling usb_fill_control_urb function by passing usb_rcvctrlpipe function as parameter. Input Parameters: usb_serial_port: Data Structure usb_serialport correponding to that seril port. Reg: Register Address Val: Value to receive from the Register. */ static int ATEN2011_get_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 * val) { struct usb_device *dev = port->serial->dev; int ret = 0; ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ATEN_RDREQ, ATEN_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, ATEN_WDR_TIMEOUT); DPRINTK("ATEN2011_get_reg_sync offset is %x, return val %x\n", reg, *val); *val = (*val) & 0x00ff; return ret; } /* Description:- To set the Uart register by calling usb_fill_control_urb function by passing usb_sndctrlpipe function as parameter. Input Parameters: usb_serial_port: Data Structure usb_serialport correponding to that seril port. Reg: Register Address Val: Value to set in the Register. */ static int ATEN2011_set_Uart_Reg(struct usb_serial_port *port, __u16 reg, __u16 val) { struct usb_device *dev = port->serial->dev; struct ATENINTL_serial *ATEN2011_serial; int minor; ATEN2011_serial = ATEN2011_get_serial_private(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 (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 4) { val |= (((__u16) port->number - (__u16) (minor)) + 1) << 8; DPRINTK("ATEN2011_set_Uart_Reg application number is %x\n", val); } else { if (((__u16) port->number - (__u16) (minor)) == 0) { // val= 0x100; val |= (((__u16) port->number - (__u16) (minor)) + 1) << 8; DPRINTK ("ATEN2011_set_Uart_Reg application number is %x\n", val); } else { // val=0x300; val |= (((__u16) port->number - (__u16) (minor)) + 2) << 8; DPRINTK ("ATEN2011_set_Uart_Reg application number is %x\n", val); } } return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ATEN_WRREQ, ATEN_WR_RTYPE, val, reg, NULL, 0, ATEN_WDR_TIMEOUT); } /* Description:- To set the Control register by calling usb_fill_control_urb function by passing usb_rcvctrlpipe function as parameter. Input Parameters: usb_serial_port: Data Structure usb_serialport correponding to that seril port. Reg: Register Address Val: Value to receive from the Register. */ static int ATEN2011_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 *ATEN2011_serial; int minor = port->serial->minor; ATEN2011_serial = ATEN2011_get_serial_private(port->serial); if (minor == SERIAL_TTY_NO_MINOR) minor = 0; //DPRINTK("application number is %4x \n",(((__u16)port->number - (__u16)(minor))+1)<<8); /*Wval is same as application number */ if (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 4) { Wval = (((__u16) port->number - (__u16) (minor)) + 1) << 8; DPRINTK("ATEN2011_get_Uart_Reg application number is %x\n", Wval); } else { if (((__u16) port->number - (__u16) (minor)) == 0) { // Wval= 0x100; Wval = (((__u16) port->number - (__u16) (minor)) + 1) << 8; DPRINTK ("ATEN2011_get_Uart_Reg application number is %x\n", Wval); } else { // Wval=0x300; Wval = (((__u16) port->number - (__u16) (minor)) + 2) << 8; DPRINTK ("ATEN2011_get_Uart_Reg application number is %x\n", 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; } void ATEN2011_Dump_serial_port(struct ATENINTL_port *ATEN2011_port) { DPRINTK("***************************************\n"); DPRINTK("Application number is %4x\n", ATEN2011_port->AppNum); DPRINTK("SpRegOffset is %2x\n", ATEN2011_port->SpRegOffset); DPRINTK("ControlRegOffset is %2x \n", ATEN2011_port->ControlRegOffset); DPRINTK("DCRRegOffset is %2x \n", ATEN2011_port->DcrRegOffset); //DPRINTK("ClkSelectRegOffset is %2x \n",ATEN2011_port->ClkSelectRegOffset); DPRINTK("***************************************\n"); } /* all structre defination goes here */ /**************************************************************************** * ATENINTL2011_4port_device * Structure defining ATEN2011, usb serial device ****************************************************************************/ static struct usb_serial_driver ATENINTL2011_4port_device = { .driver = { .owner = THIS_MODULE, .name = "ATEN2011", }, .description = DRIVER_DESC, .id_table = ATENINTL_port_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, #ifdef ATENSerialProbe .probe = ATEN2011_serial_probe, #endif .ioctl = ATEN2011_ioctl, .set_termios = ATEN2011_set_termios, .break_ctl = ATEN2011_break, // .break_ctl = ATEN2011_break_ctl, .tiocmget = ATEN2011_tiocmget, .tiocmset = ATEN2011_tiocmset, .attach = ATEN2011_startup, .shutdown = ATEN2011_shutdown, .read_bulk_callback = ATEN2011_bulk_in_callback, .read_int_callback = ATEN2011_interrupt_callback, }; static struct usb_driver io_driver = { .name = "ATEN2011", .probe = usb_serial_probe, .disconnect = usb_serial_disconnect, .id_table = id_table_combined, }; /************************************************************************/ /************************************************************************/ /* U S B C A L L B A C K F U N C T I O N S */ /* U S B C A L L B A C K F U N C T I O N S */ /************************************************************************/ /************************************************************************/ /***************************************************************************** * ATEN2011_interrupt_callback * this is the callback function for when we have received data on the * interrupt endpoint. * Input : 1 Input * pointer to the URB packet, * *****************************************************************************/ //#ifdef ATEN2011 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; //printk("in the function ATEN2011_interrupt_callback Length %d, Data %x \n",urb->actual_length,(unsigned int)urb->transfer_buffer); DPRINTK("%s", " : Entering\n"); ATEN2011_serial = (struct ATENINTL_serial *)urb->context; if (!urb) // || ATEN2011_serial->status_polling_started == FALSE ) { DPRINTK("%s", "Invalid Pointer !!!!:\n"); return; } 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", __FUNCTION__, urb->status); return; default: dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); goto exit; } length = urb->actual_length; data = urb->transfer_buffer; //ATEN2011_serial= (struct ATENINTL_serial *)urb->context; //serial = ATEN2011_get_usb_serial(port,__FUNCTION__); 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) { DPRINTK("%s \n", "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]; } // printk("%s data is sp1:%x sp2:%x sp3:%x sp4:%x status:%x\n",__FUNCTION__,sp1,sp2,sp3,sp4,st); for (i = 0; i < serial->num_ports; i++) { ATEN2011_port = ATEN2011_get_port_private(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 != FALSE) { //printk("%s wval is:(for 2011) %x\n",__FUNCTION__,wval); if (sp[i] & 0x01) { DPRINTK("SP%d No Interrupt !!!\n", i); } else { switch (sp[i] & 0x0f) { case SERIAL_IIR_RLS: DPRINTK ("Serial Port %d: Receiver status error or ", i); DPRINTK ("address bit detected in 9-bit mode\n"); ATEN2011_port->MsrLsr = 1; ATEN2011_get_reg(ATEN2011_port, wval, LINE_STATUS_REGISTER, &Data); break; case SERIAL_IIR_MS: DPRINTK ("Serial Port %d: Modem status change\n", i); ATEN2011_port->MsrLsr = 0; ATEN2011_get_reg(ATEN2011_port, wval, MODEM_STATUS_REGISTER, &Data); break; } } } } exit: if (ATEN2011_serial->status_polling_started == FALSE) return; result = usb_submit_urb(urb, GFP_ATOMIC); if (result) { dev_err(&urb->dev->dev, "%s - Error %d submitting interrupt urb\n", __FUNCTION__, result); } return; } //#endif static void ATEN2011_control_callback(struct urb *urb) { unsigned char *data; struct ATENINTL_port *ATEN2011_port; __u8 regval = 0x0; if (!urb) { DPRINTK("%s", "Invalid Pointer !!!!:\n"); return; } 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", __FUNCTION__, urb->status); return; default: dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); goto exit; } ATEN2011_port = (struct ATENINTL_port *)urb->context; DPRINTK("%s urb buffer size is %d\n", __FUNCTION__, urb->actual_length); DPRINTK("%s ATEN2011_port->MsrLsr is %d port %d\n", __FUNCTION__, ATEN2011_port->MsrLsr, ATEN2011_port->port_num); data = urb->transfer_buffer; regval = (__u8) data[0]; DPRINTK("%s data is %x\n", __FUNCTION__, regval); if (ATEN2011_port->MsrLsr == 0) handle_newMsr(ATEN2011_port, regval); else if (ATEN2011_port->MsrLsr == 1) handle_newLsr(ATEN2011_port, regval); exit: return; } 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; } int handle_newLsr(struct ATENINTL_port *port, __u8 newLsr) { struct async_icount *icount; dbg("%s - %02x", __FUNCTION__, 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 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=(struct usb_ctrlrequest *)(buffer); dr = (void *)(buffer + 2); dr->bRequestType = ATEN_RD_RTYPE; dr->bRequest = ATEN_RDREQ; dr->wValue = cpu_to_le16(Wval); //0; 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; } /***************************************************************************** * ATEN2011_bulk_in_callback * this is the callback function for when we have received data on the * bulk in endpoint. * Input : 1 Input * pointer to the URB packet, * *****************************************************************************/ 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) { DPRINTK("%s", "Invalid Pointer !!!!:\n"); return; } if (urb->status) { DPRINTK("nonzero read bulk status received: %d", urb->status); // if(urb->status==84) //ThreadState=1; return; } ATEN2011_port = (struct ATENINTL_port *)urb->context; if (!ATEN2011_port) { DPRINTK("%s", "NULL ATEN2011_port pointer \n"); return; } port = (struct usb_serial_port *)ATEN2011_port->port; if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Port Paranoia failed \n"); return; } serial = ATEN2011_get_usb_serial(port, __FUNCTION__); if (!serial) { DPRINTK("%s\n", "Bad serial pointer "); return; } DPRINTK("%s\n", "Entering... \n"); data = urb->transfer_buffer; ATEN2011_serial = ATEN2011_get_serial_private(serial); DPRINTK("%s", "Entering ........... \n"); if (urb->actual_length) { //MATRIX #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) tty = tty_port_tty_get(&ATEN2011_port->port->port); #elif LINUX_VERSION_CODE == KERNEL_VERSION(2,6,27) tty = ATEN2011_port->port->port.tty; #else tty = ATEN2011_port->port->tty; #endif if (tty) { tty_buffer_request_room(tty, urb->actual_length); tty_insert_flip_string(tty, data, urb->actual_length); DPRINTK(" %s \n", data); tty_flip_buffer_push(tty); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) tty_kref_put(tty); #endif } ATEN2011_port->icount.rx += urb->actual_length; DPRINTK("ATEN2011_port->icount.rx is %d:\n", ATEN2011_port->icount.rx); //MATRIX } if (!ATEN2011_port->read_urb) { DPRINTK("%s", "URB KILLED !!!\n"); 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) { DPRINTK (" usb_submit_urb(read bulk) failed, status = %d", status); } } } /***************************************************************************** * ATEN2011_bulk_out_data_callback * this is the callback function for when we have finished sending serial data * on the bulk out endpoint. * Input : 1 Input * pointer to the URB packet, * *****************************************************************************/ static void ATEN2011_bulk_out_data_callback(struct urb *urb) { struct ATENINTL_port *ATEN2011_port; struct tty_struct *tty; if (!urb) { DPRINTK("%s", "Invalid Pointer !!!!:\n"); return; } if (urb->status) { DPRINTK("nonzero write bulk status received:%d\n", urb->status); return; } ATEN2011_port = (struct ATENINTL_port *)urb->context; if (!ATEN2011_port) { DPRINTK("%s", "NULL ATEN2011_port pointer \n"); return; } if (ATEN2011_port_paranoia_check(ATEN2011_port->port, __FUNCTION__)) { DPRINTK("%s", "Port Paranoia failed \n"); return; } DPRINTK("%s \n", "Entering ........."); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) tty = tty_port_tty_get(&ATEN2011_port->port->port); #elif LINUX_VERSION_CODE == KERNEL_VERSION(2,6,27) tty = ATEN2011_port->port->port.tty; #else tty = ATEN2011_port->port->tty; #endif if (tty && ATEN2011_port->open) { /* let the tty driver wakeup if it has a special * * write_wakeup function */ #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) { (tty->ldisc.write_wakeup) (tty); } #endif /* tell the tty driver that something has changed */ wake_up_interruptible(&tty->write_wait); } /* Release the Write URB */ ATEN2011_port->write_in_progress = FALSE; //schedule_work(&ATEN2011_port->port->work); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) tty_kref_put(tty); #endif } /************************************************************************/ /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */ /************************************************************************/ #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 /***************************************************************************** * SerialOpen * this function is called by the tty driver when a port is opened * If successful, we return 0 * Otherwise we return a negative error number. *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int ATEN2011_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) #else static int ATEN2011_open(struct usb_serial_port *port, struct file *filp) #endif { int response; int j; struct usb_serial *serial; // struct usb_serial_port *port0; struct urb *urb; __u16 Data; int status; struct ATENINTL_serial *ATEN2011_serial; struct ATENINTL_port *ATEN2011_port; struct ktermios tmp_termios; int minor; #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) struct tty_struct *tty = NULL; #endif if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Port Paranoia failed \n"); return -ENODEV; } //ATEN2011_serial->NoOfOpenPorts++; serial = port->serial; if (ATEN2011_serial_paranoia_check(serial, __FUNCTION__)) { DPRINTK("%s", "Serial Paranoia failed \n"); return -ENODEV; } ATEN2011_port = ATEN2011_get_port_private(port); if (ATEN2011_port == NULL) return -ENODEV; /* if (ATEN2011_port->ctrl_buf==NULL) { ATEN2011_port->ctrl_buf = kmalloc(16,GFP_KERNEL); if (ATEN2011_port->ctrl_buf == NULL) { printk(", Can't allocate ctrl buff\n"); return -ENOMEM; } } if(!ATEN2011_port->control_urb) { ATEN2011_port->control_urb=kmalloc(sizeof(struct urb),GFP_KERNEL); } */ // port0 = serial->port[0]; ATEN2011_serial = ATEN2011_get_serial_private(serial); if (ATEN2011_serial == NULL) //|| port0 == NULL) { return -ENODEV; } // increment the number of opened ports counter here ATEN2011_serial->NoOfOpenPorts++; //printk("the num of ports opend is:%d\n",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.", __FUNCTION__); 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 status = 0; Data = 0x0; status = ATEN2011_get_reg_sync(port, ATEN2011_port->SpRegOffset, &Data); if (status < 0) { DPRINTK("Reading Spreg failed\n"); return -1; } Data |= 0x80; status = ATEN2011_set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); if (status < 0) { DPRINTK("writing Spreg failed\n"); return -1; } Data &= ~0x80; status = ATEN2011_set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); if (status < 0) { DPRINTK("writing Spreg failed\n"); return -1; } //End of block to be checked //**************************CHECK***************************// if (RS485mode == 0) Data = 0xC0; else Data = 0x00; status = 0; status = ATEN2011_set_Uart_Reg(port, SCRATCH_PAD_REGISTER, Data); if (status < 0) { DPRINTK("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); return -1; } else DPRINTK("SCRATCH_PAD_REGISTER Writing success status%d\n", status); //**************************CHECK***************************// status = 0; Data = 0x0; status = ATEN2011_get_reg_sync(port, ATEN2011_port->ControlRegOffset, &Data); if (status < 0) { DPRINTK("Reading Controlreg failed\n"); return -1; } Data |= 0x08; //Driver done bit /* status = ATEN2011_set_reg_sync(port,ATEN2011_port->ControlRegOffset,Data); if(status<0){ DPRINTK("writing Controlreg failed\n"); return -1; } */ Data |= 0x20; //rx_disable status = 0; status = ATEN2011_set_reg_sync(port, ATEN2011_port->ControlRegOffset, Data); if (status < 0) { DPRINTK("writing Controlreg failed\n"); return -1; } //do register settings here // Set all regs to the device default values. //////////////////////////////////// // First Disable all interrupts. //////////////////////////////////// Data = 0x00; status = 0; status = ATEN2011_set_Uart_Reg(port, INTERRUPT_ENABLE_REGISTER, Data); if (status < 0) { DPRINTK("disableing interrupts failed\n"); return -1; } // Set FIFO_CONTROL_REGISTER to the default value Data = 0x00; status = 0; status = ATEN2011_set_Uart_Reg(port, FIFO_CONTROL_REGISTER, Data); if (status < 0) { DPRINTK("Writing FIFO_CONTROL_REGISTER failed\n"); return -1; } Data = 0xcf; //chk status = 0; status = ATEN2011_set_Uart_Reg(port, FIFO_CONTROL_REGISTER, Data); if (status < 0) { DPRINTK("Writing FIFO_CONTROL_REGISTER failed\n"); return -1; } Data = 0x03; //LCR_BITS_8 status = 0; status = ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, Data); ATEN2011_port->shadowLCR = Data; Data = 0x0b; // MCR_DTR|MCR_RTS|MCR_MASTER_IE status = 0; status = ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, Data); ATEN2011_port->shadowMCR = Data; #ifdef Check Data = 0x00; status = 0; status = ATEN2011_get_Uart_Reg(port, LINE_CONTROL_REGISTER, &Data); ATEN2011_port->shadowLCR = Data; Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80 status = 0; status = ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, Data); Data = 0x0c; status = 0; status = ATEN2011_set_Uart_Reg(port, DIVISOR_LATCH_LSB, Data); Data = 0x0; status = 0; status = ATEN2011_set_Uart_Reg(port, DIVISOR_LATCH_MSB, Data); Data = 0x00; status = 0; status = ATEN2011_get_Uart_Reg(port, LINE_CONTROL_REGISTER, &Data); // Data = ATEN2011_port->shadowLCR; //data latch disable Data = Data & ~SERIAL_LCR_DLAB; status = 0; status = ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, Data); ATEN2011_port->shadowLCR = Data; #endif //clearing Bulkin and Bulkout Fifo Data = 0x0; status = 0; status = ATEN2011_get_reg_sync(port, ATEN2011_port->SpRegOffset, &Data); Data = Data | 0x0c; status = 0; status = ATEN2011_set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); Data = Data & ~0x0c; status = 0; status = ATEN2011_set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); //Finally enable all interrupts Data = 0x0; Data = 0x0c; status = 0; status = ATEN2011_set_Uart_Reg(port, INTERRUPT_ENABLE_REGISTER, Data); //clearing rx_disable Data = 0x0; status = 0; status = ATEN2011_get_reg_sync(port, ATEN2011_port->ControlRegOffset, &Data); Data = Data & ~0x20; status = 0; status = ATEN2011_set_reg_sync(port, ATEN2011_port->ControlRegOffset, Data); // rx_negate Data = 0x0; status = 0; status = ATEN2011_get_reg_sync(port, ATEN2011_port->ControlRegOffset, &Data); Data = Data | 0x10; status = 0; status = ATEN2011_set_reg_sync(port, ATEN2011_port->ControlRegOffset, Data); /* 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 LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) tty = port->tty; #endif if (tty) tty->low_latency = 1; /* printk("port number is %d \n",port->number); printk("serial number is %d \n",port->serial->minor); printk("Bulkin endpoint is %d \n",port->bulk_in_endpointAddress); printk("BulkOut endpoint is %d \n",port->bulk_out_endpointAddress); printk("Interrupt endpoint is %d \n",port->interrupt_in_endpointAddress); printk("port's number in the device is %d\n",ATEN2011_port->port_num); */ //////////////////////// //#ifdef CheckStatusPipe /* 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 = TRUE; //if (ATEN2011_serial->interrupt_in_buffer == NULL) // { /* 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; //printk(" interrupt endpoint:%d \n",ATEN2011_serial->interrupt_in_endpoint); 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) { DPRINTK("%s - Error %d submitting interrupt urb", __FUNCTION__, response); } // else // printk(" interrupt URB submitted\n"); //} } //#endif /////////////////////// /* 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.) */ DPRINTK("port number is %d \n", port->number); DPRINTK("serial number is %d \n", port->serial->minor); DPRINTK("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); DPRINTK("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); DPRINTK("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); DPRINTK("port's number in the device is %d\n", 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); DPRINTK("ATEN2011_open: bulkin endpoint is %d\n", port->bulk_in_endpointAddress); response = usb_submit_urb(ATEN2011_port->read_urb, GFP_KERNEL); if (response) { err("%s - Error %d submitting control urb", __FUNCTION__, response); } /* initialize our wait queues */ init_waitqueue_head(&ATEN2011_port->wait_open); init_waitqueue_head(&ATEN2011_port->wait_chase); init_waitqueue_head(&ATEN2011_port->delta_msr_wait); 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 = FALSE; /* send a open port command */ ATEN2011_port->openPending = FALSE; ATEN2011_port->open = TRUE; //ATEN2011_change_port_settings(ATEN2011_port,old_termios); /* Setup termios */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) ATEN2011_set_termios(tty, port, &tmp_termios); #else ATEN2011_set_termios(port, &tmp_termios); #endif ATEN2011_port->rxBytesAvail = 0x0; ATEN2011_port->icount.tx = 0; ATEN2011_port->icount.rx = 0; DPRINTK ("\n\nusb_serial serial:%x ATEN2011_port:%x\nATEN2011_serial:%x usb_serial_port port:%x\n\n", (unsigned int)serial, (unsigned int)ATEN2011_port, (unsigned int)ATEN2011_serial, (unsigned int)port); return 0; } /***************************************************************************** * ATEN2011_close * this function is called by the tty driver when a port is closed *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_close(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) #else static void ATEN2011_close(struct usb_serial_port *port, struct file *filp) #endif { struct usb_serial *serial; struct ATENINTL_serial *ATEN2011_serial; struct ATENINTL_port *ATEN2011_port; int no_urbs; __u16 Data; //__u16 Data1= 20; DPRINTK("%s\n", "ATEN2011_close:entering..."); /* MATRIX */ //ThreadState = 1; /* MATRIX */ //printk("Entering... :ATEN2011_close\n"); if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Port Paranoia failed \n"); return; } serial = ATEN2011_get_usb_serial(port, __FUNCTION__); if (!serial) { DPRINTK("%s", "Serial Paranoia failed \n"); return; } // take the Adpater and port's private data ATEN2011_serial = ATEN2011_get_serial_private(serial); ATEN2011_port = ATEN2011_get_port_private(port); if ((ATEN2011_serial == NULL) || (ATEN2011_port == NULL)) { return; } if (serial->dev) { /* flush and block(wait) until tx is empty */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) ATEN2011_block_until_tx_empty(tty, ATEN2011_port); #else ATEN2011_block_until_tx_empty(ATEN2011_port); #endif } // 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) { if (ATEN2011_port->write_urb_pool[no_urbs]) { if (ATEN2011_port->write_urb_pool[no_urbs]-> transfer_buffer) 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) { DPRINTK("%s", "Shutdown bulk write\n"); usb_kill_urb(ATEN2011_port->write_urb); } if (ATEN2011_port->read_urb) { DPRINTK("%s", "Shutdown bulk read\n"); usb_kill_urb(ATEN2011_port->read_urb); } if ((&ATEN2011_port->control_urb)) { DPRINTK("%s", "Shutdown control read\n"); // 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--; DPRINTK("NoOfOpenPorts in close%d:in port%d\n", ATEN2011_serial->NoOfOpenPorts, port->number); //printk("the num of ports opend is:%d\n",ATEN2011_serial->NoOfOpenPorts); if (ATEN2011_serial->NoOfOpenPorts == 0) { //stop the stus polling here //printk("disabling the status polling flag to FALSE :\n"); ATEN2011_serial->status_polling_started = FALSE; if (ATEN2011_serial->interrupt_read_urb) { DPRINTK("%s", "Shutdown interrupt_read_urb\n"); //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 */ if (ATEN2011_port->write_urb->transfer_buffer != NULL) { kfree(ATEN2011_port->write_urb->transfer_buffer); } usb_free_urb(ATEN2011_port->write_urb); } // clear the MCR & IER Data = 0x00; ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, Data); Data = 0x00; ATEN2011_set_Uart_Reg(port, INTERRUPT_ENABLE_REGISTER, Data); //ATEN2011_get_Uart_Reg(port,MODEM_CONTROL_REGISTER,&Data1); //printk("value of MCR after closing the port is : 0x%x\n",Data1); ATEN2011_port->open = FALSE; ATEN2011_port->closePending = FALSE; ATEN2011_port->openPending = FALSE; DPRINTK("%s \n", "Leaving ............"); } /***************************************************************************** * SerialBreak * this function sends a break to the port *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_break(struct tty_struct *tty, int break_state) #else static void ATEN2011_break(struct usb_serial_port *port, int break_state) #endif { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) struct usb_serial_port *port = tty->driver_data; #endif unsigned char data; struct usb_serial *serial; struct ATENINTL_serial *ATEN2011_serial; struct ATENINTL_port *ATEN2011_port; DPRINTK("%s \n", "Entering ..........."); DPRINTK("ATEN2011_break: Start\n"); if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Port Paranoia failed \n"); return; } serial = ATEN2011_get_usb_serial(port, __FUNCTION__); if (!serial) { DPRINTK("%s", "Serial Paranoia failed \n"); return; } ATEN2011_serial = ATEN2011_get_serial_private(serial); ATEN2011_port = ATEN2011_get_port_private(port); if ((ATEN2011_serial == NULL) || (ATEN2011_port == NULL)) { return; } /* flush and chase */ ATEN2011_port->chaseResponsePending = TRUE; if (serial->dev) { /* flush and block until tx is empty */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) ATEN2011_block_until_chase_response(tty, ATEN2011_port); #else ATEN2011_block_until_chase_response(ATEN2011_port); #endif } if (break_state == -1) { data = ATEN2011_port->shadowLCR | LCR_SET_BREAK; } else { data = ATEN2011_port->shadowLCR & ~LCR_SET_BREAK; } ATEN2011_port->shadowLCR = data; DPRINTK("ATEN2011_break ATEN2011_port->shadowLCR is %x\n", ATEN2011_port->shadowLCR); ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, ATEN2011_port->shadowLCR); return; } /************************************************************************ * * ATEN2011_block_until_chase_response * * This function will block the close until one of the following: * 1. Response to our Chase comes from ATEN2011 * 2. A timout of 10 seconds without activity has expired * (1K of ATEN2011 data @ 2400 baud ==> 4 sec to empty) * ************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_block_until_chase_response(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port) #else static void ATEN2011_block_until_chase_response(struct ATENINTL_port *ATEN2011_port) #endif { int timeout = 1 * HZ; int wait = 10; int count; while (1) { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) count = ATEN2011_chars_in_buffer(tty); #else count = ATEN2011_chars_in_buffer(ATEN2011_port->port); #endif /* Check for Buffer status */ if (count <= 0) { ATEN2011_port->chaseResponsePending = FALSE; 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", __FUNCTION__); return; } else { /* Reset timout value back to seconds */ wait = 10; } } } /************************************************************************ * * ATEN2011_block_until_tx_empty * * This function will block the close until one of the following: * 1. TX count are 0 * 2. The ATEN2011 has stopped * 3. A timout of 3 seconds without activity has expired * ************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_block_until_tx_empty(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port) #else static void ATEN2011_block_until_tx_empty(struct ATENINTL_port *ATEN2011_port) #endif { int timeout = HZ / 10; int wait = 30; int count; while (1) { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) count = ATEN2011_chars_in_buffer(tty); #else count = ATEN2011_chars_in_buffer(ATEN2011_port->port); #endif /* 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", __FUNCTION__); return; } else { /* Reset timout value back to seconds */ wait = 30; } } } /***************************************************************************** * ATEN2011_write_room * this function is called by the tty driver when it wants to know how many * bytes of data we can accept for a specific port. * If successful, we return the amount of room that we have for this port * Otherwise we return a negative error number. *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int ATEN2011_write_room(struct tty_struct *tty) #else static int ATEN2011_write_room(struct usb_serial_port *port) #endif { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) struct usb_serial_port *port = tty->driver_data; #endif int i; int room = 0; struct ATENINTL_port *ATEN2011_port; // DPRINTK("%s \n"," ATEN2011_write_room:entering ..........."); if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); DPRINTK("%s \n", " ATEN2011_write_room:leaving ..........."); return -1; } ATEN2011_port = ATEN2011_get_port_private(port); if (ATEN2011_port == NULL) { DPRINTK("%s \n", "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", __FUNCTION__, room); return (room); } /***************************************************************************** * ATEN2011_chars_in_buffer * this function is called by the tty driver when it wants to know how many * bytes of data we currently have outstanding in the port (data that has * been written, but hasn't made it out the port yet) * If successful, we return the number of bytes left to be written in the * system, * Otherwise we return a negative error number. *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int ATEN2011_chars_in_buffer(struct tty_struct *tty) #else static int ATEN2011_chars_in_buffer(struct usb_serial_port *port) #endif { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) struct usb_serial_port *port = tty->driver_data; #endif int i; int chars = 0; struct ATENINTL_port *ATEN2011_port; //DPRINTK("%s \n"," ATEN2011_chars_in_buffer:entering ..........."); if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); return -1; } ATEN2011_port = ATEN2011_get_port_private(port); if (ATEN2011_port == NULL) { DPRINTK("%s \n", "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", __FUNCTION__, chars); return (chars); } /***************************************************************************** * SerialWrite * this function is called by the tty driver when data should be written to * the port. * If successful, we return the number of bytes written, otherwise we * return a negative error number. *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int ATEN2011_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *data, int count) #else static int ATEN2011_write(struct usb_serial_port *port, const unsigned char *data, int count) #endif { int status; int i; int bytes_sent = 0; int transfer_size; int from_user = 0; int minor; struct ATENINTL_port *ATEN2011_port; struct usb_serial *serial; struct ATENINTL_serial *ATEN2011_serial; struct urb *urb; //__u16 Data; const unsigned char *current_position = data; unsigned char *data1; DPRINTK("%s \n", "entering ..........."); //DPRINTK("ATEN2011_write: ATEN2011_port->shadowLCR is %x\n",ATEN2011_port->shadowLCR); #ifdef NOTATEN2011 Data = 0x00; status = 0; status = ATEN2011_get_Uart_Reg(port, LINE_CONTROL_REGISTER, &Data); ATEN2011_port->shadowLCR = Data; DPRINTK("ATEN2011_write: LINE_CONTROL_REGISTER is %x\n", Data); DPRINTK("ATEN2011_write: ATEN2011_port->shadowLCR is %x\n", ATEN2011_port->shadowLCR); //Data = 0x03; //status = ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data); //ATEN2011_port->shadowLCR=Data;//Need to add later Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80 status = 0; status = ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, Data); //Data = 0x0c; //status = ATEN2011_set_Uart_Reg(port,DIVISOR_LATCH_LSB,Data); Data = 0x00; status = 0; status = ATEN2011_get_Uart_Reg(port, DIVISOR_LATCH_LSB, &Data); DPRINTK("ATEN2011_write:DLL value is %x\n", Data); Data = 0x0; status = 0; status = ATEN2011_get_Uart_Reg(port, DIVISOR_LATCH_MSB, &Data); DPRINTK("ATEN2011_write:DLM value is %x\n", Data); Data = Data & ~SERIAL_LCR_DLAB; DPRINTK("ATEN2011_write: ATEN2011_port->shadowLCR is %x\n", ATEN2011_port->shadowLCR); status = 0; status = ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, Data); #endif if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Port Paranoia failed \n"); return -1; } serial = port->serial; if (ATEN2011_serial_paranoia_check(serial, __FUNCTION__)) { DPRINTK("%s", "Serial Paranoia failed \n"); return -1; } ATEN2011_port = ATEN2011_get_port_private(port); if (ATEN2011_port == NULL) { DPRINTK("%s", "ATEN2011_port is NULL\n"); return -1; } ATEN2011_serial = ATEN2011_get_serial_private(serial); if (ATEN2011_serial == NULL) { DPRINTK("%s", "ATEN2011_serial is NULL \n"); 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]; DPRINTK("\nURB:%d", i); break; } } if (urb == NULL) { dbg("%s - no more free urbs", __FUNCTION__); 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...", __FUNCTION__); goto exit; } } transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); if (from_user) { if (copy_from_user (urb->transfer_buffer, current_position, transfer_size)) { bytes_sent = -EFAULT; goto exit; } } else { memcpy(urb->transfer_buffer, current_position, transfer_size); } //usb_serial_debug_data (__FILE__, __FUNCTION__, 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; DPRINTK("\nbulkout endpoint is %d", port->bulk_out_endpointAddress); //for(i=0;i < urb->actual_length;i++) // DPRINTK("Data is %c\n ",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", __FUNCTION__, status); bytes_sent = status; goto exit; } bytes_sent = transfer_size; ATEN2011_port->icount.tx += transfer_size; DPRINTK("ATEN2011_port->icount.tx is %d:\n", ATEN2011_port->icount.tx); exit: return bytes_sent; } /***************************************************************************** * SerialThrottle * this function is called by the tty driver when it wants to stop the data * being read from the port. *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_throttle(struct tty_struct *tty) #else static void ATEN2011_throttle(struct usb_serial_port *port) #endif { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) struct usb_serial_port *port = tty->driver_data; #else struct tty_struct *tty; #endif struct ATENINTL_port *ATEN2011_port; int status; if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); return; } DPRINTK("- port %d\n", port->number); ATEN2011_port = ATEN2011_get_port_private(port); if (ATEN2011_port == NULL) return; if (!ATEN2011_port->open) { DPRINTK("%s\n", "port not opened"); return; } DPRINTK("%s", "Entering .......... \n"); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) tty = port->tty; #endif if (!tty) { dbg("%s - no tty available", __FUNCTION__); return; } /* if we are implementing XON/XOFF, send the stop character */ if (I_IXOFF(tty)) { unsigned char stop_char = STOP_CHAR(tty); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) status = ATEN2011_write(tty, port, &stop_char, 1); //FC4 #else status = ATEN2011_write(port, &stop_char, 1); //FC4 #endif 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 = 0; status = ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, ATEN2011_port->shadowMCR); if (status < 0) { return; } } return; } /***************************************************************************** * ATEN2011_unthrottle * this function is called by the tty driver when it wants to resume the data * being read from the port (called after SerialThrottle is called) *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_unthrottle(struct tty_struct *tty) #else static void ATEN2011_unthrottle(struct usb_serial_port *port) #endif { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) struct usb_serial_port *port = tty->driver_data; #else struct tty_struct *tty; #endif int status; struct ATENINTL_port *ATEN2011_port = ATEN2011_get_port_private(port); if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); return; } if (ATEN2011_port == NULL) return; if (!ATEN2011_port->open) { dbg("%s - port not opened", __FUNCTION__); return; } DPRINTK("%s", "Entering .......... \n"); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) tty = port->tty; #endif if (!tty) { dbg("%s - no tty available", __FUNCTION__); return; } /* if we are implementing XON/XOFF, send the start character */ if (I_IXOFF(tty)) { unsigned char start_char = START_CHAR(tty); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) status = ATEN2011_write(tty, port, &start_char, 1); //FC4 #else status = ATEN2011_write(port, &start_char, 1); //FC4 #endif 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 = 0; status = ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, ATEN2011_port->shadowMCR); if (status < 0) { return; } } return; } #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int ATEN2011_tiocmget(struct tty_struct *tty, struct file *file) #else static int ATEN2011_tiocmget(struct usb_serial_port *port, struct file *file) #endif { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) struct usb_serial_port *port = tty->driver_data; #endif //struct ti_port *tport = usb_get_serial_port_data(port); struct ATENINTL_port *ATEN2011_port; unsigned int result; __u16 msr; __u16 mcr; //unsigned int mcr; int status = 0; ATEN2011_port = ATEN2011_get_port_private(port); DPRINTK("%s - port %d", __FUNCTION__, port->number); if (ATEN2011_port == NULL) return -ENODEV; status = ATEN2011_get_Uart_Reg(port, MODEM_STATUS_REGISTER, &msr); status = ATEN2011_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); DPRINTK("%s - 0x%04X", __FUNCTION__, result); return result; } #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int ATEN2011_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) #else static int ATEN2011_tiocmset(struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear) #endif { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) struct usb_serial_port *port = tty->driver_data; #endif struct ATENINTL_port *ATEN2011_port; //struct ti_port *tport = usb_get_serial_port_data(port); unsigned int mcr; unsigned int status; DPRINTK("%s - port %d", __FUNCTION__, port->number); ATEN2011_port = ATEN2011_get_port_private(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 = 0; status = ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, mcr); if (status < 0) { DPRINTK("setting MODEM_CONTROL_REGISTER Failed\n"); return -1; } return 0; } /***************************************************************************** * SerialSetTermios * this function is called by the tty driver when it wants to change the termios structure *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) #else static void ATEN2011_set_termios(struct usb_serial_port *port, struct ktermios *old_termios) #endif { int status; unsigned int cflag; struct usb_serial *serial; struct ATENINTL_port *ATEN2011_port; #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) struct tty_struct *tty; #endif DPRINTK("ATEN2011_set_termios: START\n"); if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); return; } serial = port->serial; if (ATEN2011_serial_paranoia_check(serial, __FUNCTION__)) { DPRINTK("%s", "Invalid Serial \n"); return; } ATEN2011_port = ATEN2011_get_port_private(port); if (ATEN2011_port == NULL) return; #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) tty = port->tty; if (!port->tty || !port->tty->termios) { dbg("%s - no tty or termios", __FUNCTION__); return; } #endif if (!ATEN2011_port->open) { dbg("%s - port not opened", __FUNCTION__); return; } DPRINTK("%s\n", "setting termios - "); cflag = tty->termios->c_cflag; if (!cflag) { DPRINTK("%s %s\n", __FUNCTION__, "cflag is NULL"); return; } /* check that they really want us to change something */ if (old_termios) { if ((cflag == old_termios->c_cflag) && (RELEVANT_IFLAG(tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { DPRINTK("%s\n", "Nothing to change"); return; } } dbg("%s - clfag %08x iflag %08x", __FUNCTION__, tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); if (old_termios) { dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); } dbg("%s - port %d", __FUNCTION__, port->number); /* change the port settings to the new ones specified */ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) ATEN2011_change_port_settings(tty, ATEN2011_port, old_termios); #else ATEN2011_change_port_settings(ATEN2011_port, old_termios); #endif if (!ATEN2011_port->read_urb) { DPRINTK("%s", "URB KILLED !!!!!\n"); 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) { DPRINTK (" usb_submit_urb(read bulk) failed, status = %d", status); } } return; } /* static void ATEN2011_break_ctl( struct usb_serial_port *port, int break_state ) { //struct usb_serial *serial = port->serial; // if (BSA_USB_CMD(BELKIN_SA_SET_BREAK_REQUEST, break_state ? 1 : 0) < 0) // err("Set break_ctl %d", break_state); } */ /***************************************************************************** * get_lsr_info - get line status register info * * Purpose: Let user call ioctl() to get info when the UART physically * is emptied. On bus types like RS485, the transmitter must * release the bus after transmitting. This must be done when * the transmit shift register is empty, not be done when the * transmit holding register is empty. This functionality * allows an RS485 driver to be written in user space. *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int get_lsr_info(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, unsigned int *value) #else static int get_lsr_info(struct ATENINTL_port *ATEN2011_port, unsigned int *value) #endif { int count; unsigned int result = 0; #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) count = ATEN2011_chars_in_buffer(tty); #else count = ATEN2011_chars_in_buffer(ATEN2011_port->port); #endif if (count == 0) { dbg("%s -- Empty", __FUNCTION__); result = TIOCSER_TEMT; } if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return 0; } /***************************************************************************** * get_number_bytes_avail - get number of bytes available * * Purpose: Let user call ioctl to get the count of number of bytes available. *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int get_number_bytes_avail(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, unsigned int *value) #else static int get_number_bytes_avail(struct ATENINTL_port *ATEN2011_port, unsigned int *value) #endif { unsigned int result = 0; #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) struct tty_struct *tty = ATEN2011_port->port->tty; #endif if (!tty) return -ENOIOCTLCMD; result = tty->read_cnt; dbg("%s(%d) = %d", __FUNCTION__, ATEN2011_port->port->number, result); if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return -ENOIOCTLCMD; } /***************************************************************************** * set_modem_info * function to set modem info *****************************************************************************/ static int set_modem_info(struct ATENINTL_port *ATEN2011_port, unsigned int cmd, unsigned int *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; if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); return -1; } 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 = 0; status = ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, Data); if (status < 0) { DPRINTK("setting MODEM_CONTROL_REGISTER Failed\n"); return -1; } return 0; } /***************************************************************************** * get_modem_info * function to get modem info *****************************************************************************/ static int get_modem_info(struct ATENINTL_port *ATEN2011_port, unsigned int *value) { unsigned int result = 0; __u16 msr; unsigned int mcr = ATEN2011_port->shadowMCR; int status = 0; status = ATEN2011_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", __FUNCTION__, result); if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return 0; } /***************************************************************************** * get_serial_info * function to get information about serial port *****************************************************************************/ static int get_serial_info(struct ATENINTL_port *ATEN2011_port, struct serial_struct *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; } /***************************************************************************** * SerialIoctl * this function handles any ioctl calls to the driver *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static int ATEN2011_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) #else static int ATEN2011_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) #endif { #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) struct usb_serial_port *port = tty->driver_data; #else struct tty_struct *tty; #endif struct ATENINTL_port *ATEN2011_port; struct async_icount cnow; struct async_icount cprev; struct serial_icounter_struct icount; int ATENret = 0; //int retval; //struct tty_ldisc *ld; //printk("%s - port %d, cmd = 0x%x\n", __FUNCTION__, port->number, cmd); if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); return -1; } ATEN2011_port = ATEN2011_get_port_private(port); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) tty = ATEN2011_port->port->tty; #endif if (ATEN2011_port == NULL) return -1; dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); switch (cmd) { /* return number of bytes available */ case TIOCINQ: dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) return get_number_bytes_avail(tty, ATEN2011_port, (unsigned int *)arg); #else return get_number_bytes_avail(ATEN2011_port, (unsigned int *)arg); #endif break; case TIOCOUTQ: dbg("%s (%d) TIOCOUTQ", __FUNCTION__, port->number); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) return put_user(ATEN2011_chars_in_buffer(tty), (int __user *)arg); #else return put_user(tty->driver->ops->chars_in_buffer ? tty->driver->ops->chars_in_buffer(tty) : 0, (int __user *)arg); #endif break; /* //2.6.17 block case TCFLSH: retval = tty_check_change(tty); if (retval) return retval; ld = tty_ldisc_ref(tty); switch (arg) { case TCIFLUSH: if (ld && ld->flush_buffer) ld->flush_buffer(tty); break; case TCIOFLUSH: if (ld && ld->flush_buffer) ld->flush_buffer(tty); // fall through case TCOFLUSH: if (tty->driver->flush_buffer) tty->driver->flush_buffer(tty); break; default: tty_ldisc_deref(ld); return -EINVAL; } tty_ldisc_deref(ld); return 0; */ case TIOCSERGETLSR: dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) return get_lsr_info(tty, ATEN2011_port, (unsigned int *)arg); #else return get_lsr_info(ATEN2011_port, (unsigned int *)arg); #endif return 0; case TIOCMBIS: case TIOCMBIC: case TIOCMSET: dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, port->number); // printk("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, port->number); ATENret = set_modem_info(ATEN2011_port, cmd, (unsigned int *)arg); // printk(" %s: ret:%d\n",__FUNCTION__,ATENret); return ATENret; case TIOCMGET: dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number); return get_modem_info(ATEN2011_port, (unsigned int *)arg); case TIOCGSERIAL: dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); return get_serial_info(ATEN2011_port, (struct serial_struct *)arg); case TIOCSSERIAL: dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); break; case TIOCMIWAIT: dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); cprev = ATEN2011_port->icount; while (1) { //interruptible_sleep_on(&ATEN2011_port->delta_msr_wait); // ATEN2011_port->delta_msr_cond=0; //wait_event_interruptible(ATEN2011_port->delta_msr_wait,(ATEN2011_port->delta_msr_cond==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", __FUNCTION__, port->number, icount.rx, icount.tx); if (copy_to_user((void *)arg, &icount, sizeof(icount))) return -EFAULT; return 0; case TIOCEXBAUD: return 0; default: break; } return -ENOIOCTLCMD; } /***************************************************************************** * ATEN2011_send_cmd_write_baud_rate * this function sends the proper command to change the baud rate of the * specified port. *****************************************************************************/ 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; if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); return -1; } if (ATEN2011_serial_paranoia_check(port->serial, __FUNCTION__)) { DPRINTK("%s", "Invalid Serial \n"); return -1; } DPRINTK("%s", "Entering .......... \n"); 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", __FUNCTION__, 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; status = 0; //Data = ATEN2011_port->shadowMCR ; Data = 0x2b; ATEN2011_port->shadowMCR = Data; status = ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, Data); if (status < 0) { DPRINTK("Writing spreg failed in set_serial_baud\n"); return -1; } #endif } else { #ifdef HW_flow_control //setting h/w flow control bit to 0; status = 0; //Data = ATEN2011_port->shadowMCR ; Data = 0xb; ATEN2011_port->shadowMCR = Data; status = ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, Data); if (status < 0) { DPRINTK("Writing spreg failed in set_serial_baud\n"); return -1; } #endif } if (1) //baudRate <= 115200) { clk_sel_val = 0x0; Data = 0x0; status = 0; status = ATEN2011_calc_baud_rate_divisor(baudRate, &divisor, &clk_sel_val); status = ATEN2011_get_reg_sync(port, ATEN2011_port->SpRegOffset, &Data); if (status < 0) { DPRINTK("reading spreg failed in set_serial_baud\n"); return -1; } Data = (Data & 0x8f) | clk_sel_val; status = 0; status = ATEN2011_set_reg_sync(port, ATEN2011_port->SpRegOffset, Data); if (status < 0) { DPRINTK("Writing spreg failed in set_serial_baud\n"); return -1; } /* Calculate the Divisor */ if (status) { err("%s - bad baud rate", __FUNCTION__); DPRINTK("%s\n", "bad baud rate"); return status; } /* Enable access to divisor latch */ Data = ATEN2011_port->shadowLCR | SERIAL_LCR_DLAB; ATEN2011_port->shadowLCR = Data; ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, Data); /* Write the divisor */ Data = LOW8(divisor); //: commented to test DPRINTK("set_serial_baud Value to write DLL is %x\n", Data); ATEN2011_set_Uart_Reg(port, DIVISOR_LATCH_LSB, Data); Data = HIGH8(divisor); //: commented to test DPRINTK("set_serial_baud Value to write DLM is %x\n", Data); ATEN2011_set_Uart_Reg(port, DIVISOR_LATCH_MSB, Data); /* Disable access to divisor latch */ Data = ATEN2011_port->shadowLCR & ~SERIAL_LCR_DLAB; ATEN2011_port->shadowLCR = Data; ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, Data); } return status; } /***************************************************************************** * ATEN2011_calc_baud_rate_divisor * this function calculates the proper baud rate divisor for the specified * baud rate. *****************************************************************************/ static int ATEN2011_calc_baud_rate_divisor(int baudRate, int *divisor, __u16 * clk_sel_val) { //int i; //__u16 custom,round1, round; dbg("%s - %d", __FUNCTION__, 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; #ifdef NOTATEN2011 for (i = 0; i < NUM_ENTRIES(ATEN2011_divisor_table); i++) { if (ATEN2011_divisor_table[i].BaudRate == baudrate) { *divisor = ATEN2011_divisor_table[i].Divisor; return 0; } } /* After trying for all the standard baud rates * * Try calculating the divisor for this baud rate */ if (baudrate > 75 && baudrate < 230400) { /* get the divisor */ custom = (__u16) (230400L / baudrate); /* Check for round off */ round1 = (__u16) (2304000L / baudrate); round = (__u16) (round1 - (custom * 10)); if (round > 4) { custom++; } *divisor = custom; DPRINTK(" Baud %d = %d\n", baudrate, custom); return 0; } DPRINTK("%s\n", " Baud calculation Failed..."); return -1; #endif } /***************************************************************************** * ATEN2011_change_port_settings * This routine is called to set the UART on the device to match * the specified new settings. *****************************************************************************/ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) static void ATEN2011_change_port_settings(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios) #else static void ATEN2011_change_port_settings(struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios) #endif { #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) struct tty_struct *tty; #endif int baud; unsigned cflag; unsigned iflag; __u8 mask = 0xff; __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; if (ATEN2011_port_paranoia_check(port, __FUNCTION__)) { DPRINTK("%s", "Invalid port \n"); return; } if (ATEN2011_serial_paranoia_check(port->serial, __FUNCTION__)) { DPRINTK("%s", "Invalid Serial \n"); return; } serial = port->serial; dbg("%s - port %d", __FUNCTION__, ATEN2011_port->port->number); if ((!ATEN2011_port->open) && (!ATEN2011_port->openPending)) { dbg("%s - port not opened", __FUNCTION__); return; } #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) tty = ATEN2011_port->port->tty; #endif if ((!tty) || (!tty->termios)) { dbg("%s - no tty structures", __FUNCTION__); return; } DPRINTK("%s", "Entering .......... \n"); 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; mask = 0x1f; break; case CS6: lData = LCR_BITS_6; mask = 0x3f; break; case CS7: lData = LCR_BITS_7; mask = 0x7f; 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", __FUNCTION__); } else { lParity = LCR_PAR_EVEN; dbg("%s - parity = even", __FUNCTION__); } } else { dbg("%s - parity = none", __FUNCTION__); } if (cflag & CMSPAR) { lParity = lParity | 0x20; } /* Change the Stop bit */ if (cflag & CSTOPB) { lStop = LCR_STOP_2; dbg("%s - stop bits = 2", __FUNCTION__); } else { lStop = LCR_STOP_1; dbg("%s - stop bits = 1", __FUNCTION__); } /* 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); ATEN2011_port->validDataMask = mask; DPRINTK ("ATEN2011_change_port_settings ATEN2011_port->shadowLCR is %x\n", ATEN2011_port->shadowLCR); /* Disable Interrupts */ Data = 0x00; ATEN2011_set_Uart_Reg(port, INTERRUPT_ENABLE_REGISTER, Data); Data = 0x00; ATEN2011_set_Uart_Reg(port, FIFO_CONTROL_REGISTER, Data); Data = 0xcf; ATEN2011_set_Uart_Reg(port, FIFO_CONTROL_REGISTER, Data); /* Send the updated LCR value to the ATEN2011 */ Data = ATEN2011_port->shadowLCR; ATEN2011_set_Uart_Reg(port, LINE_CONTROL_REGISTER, Data); Data = 0x00b; ATEN2011_port->shadowMCR = Data; ATEN2011_set_Uart_Reg(port, MODEM_CONTROL_REGISTER, Data); Data = 0x00b; ATEN2011_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; ATEN2011_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... */ DPRINTK("%s\n", "Picked default baud..."); baud = 9600; } dbg("%s - baud rate = %d", __FUNCTION__, baud); status = ATEN2011_send_cmd_write_baud_rate(ATEN2011_port, baud); /* Enable Interrupts */ Data = 0x0c; ATEN2011_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) { DPRINTK (" usb_submit_urb(read bulk) failed, status = %d", status); } } //wake_up(&ATEN2011_port->delta_msr_wait); //ATEN2011_port->delta_msr_cond=1; DPRINTK ("ATEN2011_change_port_settings ATEN2011_port->shadowLCR is End %x\n", 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); //printk("ATEN2011_calc_num_ports GPIO is %x\n",Data); /* 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; } /**************************************************************************** * ATEN2011_startup ****************************************************************************/ 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; DPRINTK("%s \n", " ATEN2011_startup :entering.........."); if (!serial) { DPRINTK("%s\n", "Invalid Handler"); return -1; } dev = serial->dev; DPRINTK("%s\n", "Entering..."); /* create our private serial structure */ ATEN2011_serial = kzalloc(sizeof(struct ATENINTL_serial), GFP_KERNEL); if (ATEN2011_serial == NULL) { err("%s - Out of memory", __FUNCTION__); 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 FALSE ATEN2011_serial->status_polling_started = FALSE; ATEN2011_set_serial_private(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", __FUNCTION__); ATEN2011_set_serial_private(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]; // ATEN2011_set_port_private(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); ATEN2011_port->AppNum = (((__u16) serial->port[i]->number - (__u16) (minor)) + 1) << 8; if (ATEN2011_port->port_num == 1) { ATEN2011_port->SpRegOffset = 0x0; ATEN2011_port->ControlRegOffset = 0x1; ATEN2011_port->DcrRegOffset = 0x4; //ATEN2011_port->ClkSelectRegOffset = ; } 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; //ATEN2011_port->ClkSelectRegOffset = ; } 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; //ATEN2011_port->ClkSelectRegOffset = ; } 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; //ATEN2011_port->ClkSelectRegOffset = ; } 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; //ATEN2011_port->ClkSelectRegOffset = ; } ATEN2011_Dump_serial_port(ATEN2011_port); ATEN2011_set_port_private(serial->port[i], ATEN2011_port); //enable rx_disable bit in control register status = ATEN2011_get_reg_sync(serial->port[i], ATEN2011_port->ControlRegOffset, &Data); if (status < 0) { DPRINTK("Reading ControlReg failed status-0x%x\n", status); break; } else DPRINTK ("ControlReg Reading success val is %x, status%d\n", 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 = 0; status = ATEN2011_set_reg_sync(serial->port[i], ATEN2011_port->ControlRegOffset, Data); if (status < 0) { DPRINTK ("Writing ControlReg failed(rx_disable) status-0x%x\n", status); break; } else DPRINTK ("ControlReg Writing success(rx_disable) status%d\n", status); //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3 Data = 0x01; status = 0; status = ATEN2011_set_reg_sync(serial->port[i], (__u16) (ATEN2011_port->DcrRegOffset + 0), Data); if (status < 0) { DPRINTK("Writing DCR0 failed status-0x%x\n", status); break; } else DPRINTK("DCR0 Writing success status%d\n", status); Data = 0x05; status = 0; status = ATEN2011_set_reg_sync(serial->port[i], (__u16) (ATEN2011_port->DcrRegOffset + 1), Data); if (status < 0) { DPRINTK("Writing DCR1 failed status-0x%x\n", status); break; } else DPRINTK("DCR1 Writing success status%d\n", status); Data = 0x24; status = 0; status = ATEN2011_set_reg_sync(serial->port[i], (__u16) (ATEN2011_port->DcrRegOffset + 2), Data); if (status < 0) { DPRINTK("Writing DCR2 failed status-0x%x\n", status); break; } else DPRINTK("DCR2 Writing success status%d\n", status); // write values in clkstart0x0 and clkmulti 0x20 Data = 0x0; status = 0; status = ATEN2011_set_reg_sync(serial->port[i], CLK_START_VALUE_REGISTER, Data); if (status < 0) { DPRINTK ("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); break; } else DPRINTK ("CLK_START_VALUE_REGISTER Writing success status%d\n", status); Data = 0x20; status = 0; status = ATEN2011_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER, Data); if (status < 0) { DPRINTK ("Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); break; } else DPRINTK("CLK_MULTI_REGISTER Writing success status%d\n", status); //write value 0x0 to scratchpad register /* if(RS485mode==0) Data = 0xC0; else Data = 0x00; status=0; status=ATEN2011_set_Uart_Reg(serial->port[i],SCRATCH_PAD_REGISTER,Data); if(status<0) { DPRINTK("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); break; } else DPRINTK("SCRATCH_PAD_REGISTER Writing success status%d\n",status); */ /* //Threshold Registers if(ATEN2011_serial->ATEN2011_spectrum_2or4ports==4) { Data = 0x00; status=0; status=ATEN2011_set_reg_sync(serial->port[i],\ (__u16)(THRESHOLD_VAL_SP1_1+(__u16)ATEN2011_Thr_cnt),Data); DPRINTK("THRESHOLD_VAL offset is%x\n", (__u16)(THRESHOLD_VAL_SP1_1+(__u16)ATEN2011_Thr_cnt)); if(status<0) { DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status); break; } else DPRINTK("THRESHOLD_VAL Writing success status%d\n",status); ATEN2011_Thr_cnt++; Data = 0x01; status=0; status=ATEN2011_set_reg_sync(serial->port[i],\ (__u16)(THRESHOLD_VAL_SP1_1+(__u16)ATEN2011_Thr_cnt),Data); DPRINTK("THRESHOLD_VAL offsetis%x\n",(__u16)(THRESHOLD_VAL_SP1_1+(__u16)ATEN2011_Thr_cnt)); if(status<0) { DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status); break; } else DPRINTK("THRESHOLD_VAL Writing success status%d\n",status); ATEN2011_Thr_cnt++; } else { if(ATEN2011_port->port_num==1) { Data = 0x00; status=0; status=ATEN2011_set_reg_sync(serial->port[i],\ 0x3f,Data); DPRINTK("THRESHOLD_VAL offset is 0x3f\n"); if(status<0) { DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status); break; } Data = 0x01; status=0; status=ATEN2011_set_reg_sync(serial->port[i],\ 0x40,Data); DPRINTK("THRESHOLD_VAL offset is 0x40\n"); if(status<0) { DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status); break; } } else { Data = 0x00; status=0; status=ATEN2011_set_reg_sync(serial->port[i],\ 0x43,Data); DPRINTK("THRESHOLD_VAL offset is 0x43\n"); if(status<0) { DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status); break; } Data = 0x01; status=0; status=ATEN2011_set_reg_sync(serial->port[i],\ 0x44,Data); DPRINTK("THRESHOLD_VAL offset is 0x44\n"); if(status<0) { DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status); break; } } } */ //Zero Length flag register if ((ATEN2011_port->port_num != 1) && (ATEN2011_serial->ATEN2011_spectrum_2or4ports == 2)) { Data = 0xff; status = 0; status = ATEN2011_set_reg_sync(serial->port[i], (__u16) (ZLP_REG1 + ((__u16) ATEN2011_port-> port_num)), Data); DPRINTK("ZLIP offset%x\n", (__u16) (ZLP_REG1 + ((__u16) ATEN2011_port->port_num))); if (status < 0) { DPRINTK ("Writing ZLP_REG%d failed status-0x%x\n", i + 2, status); break; } else DPRINTK("ZLP_REG%d Writing success status%d\n", i + 2, status); } else { Data = 0xff; status = 0; status = ATEN2011_set_reg_sync(serial->port[i], (__u16) (ZLP_REG1 + ((__u16) ATEN2011_port-> port_num) - 0x1), Data); DPRINTK("ZLIP offset%x\n", (__u16) (ZLP_REG1 + ((__u16) ATEN2011_port->port_num) - 0x1)); if (status < 0) { DPRINTK ("Writing ZLP_REG%d failed status-0x%x\n", i + 1, status); break; } else DPRINTK("ZLP_REG%d Writing success status%d\n", i + 1, status); } ATEN2011_port->control_urb = usb_alloc_urb(0, GFP_ATOMIC); ATEN2011_port->ctrl_buf = kmalloc(16, GFP_KERNEL); } ATEN2011_Thr_cnt = 0; //Zero Length flag enable Data = 0x0f; status = 0; status = ATEN2011_set_reg_sync(serial->port[0], ZLP_REG5, Data); if (status < 0) { DPRINTK("Writing ZLP_REG5 failed status-0x%x\n", status); return -1; } else DPRINTK("ZLP_REG5 Writing success status%d\n", status); /* setting configuration feature to one */ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), (__u8) 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 5 * HZ); ATEN2011_Thr_cnt = 0; return 0; } /**************************************************************************** * ATEN2011_shutdown * This function is called whenever the device is removed from the usb bus. ****************************************************************************/ static void ATEN2011_shutdown(struct usb_serial *serial) { int i; struct ATENINTL_port *ATEN2011_port; DPRINTK("%s \n", " shutdown :entering.........."); /* MATRIX */ //ThreadState = 1; /* MATRIX */ if (!serial) { DPRINTK("%s", "Invalid Handler \n"); return; } /* 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 = ATEN2011_get_port_private(serial->port[i]); kfree(ATEN2011_port->ctrl_buf); usb_kill_urb(ATEN2011_port->control_urb); kfree(ATEN2011_port); ATEN2011_set_port_private(serial->port[i], NULL); } /* free private structure allocated for serial device */ kfree(ATEN2011_get_serial_private(serial)); ATEN2011_set_serial_private(serial, NULL); DPRINTK("%s\n", "Thank u :: "); } /* Inline functions to check the sanity of a pointer that is passed to us */ static int ATEN2011_serial_paranoia_check(struct usb_serial *serial, const char *function) { if (!serial) { dbg("%s - serial == NULL", function); return -1; } // if (serial->magic != USB_SERIAL_MAGIC) { // dbg("%s - bad magic number for serial", function); // return -1; // } if (!serial->type) { dbg("%s - serial->type == NULL!", function); return -1; } return 0; } static int ATEN2011_port_paranoia_check(struct usb_serial_port *port, const char *function) { if (!port) { dbg("%s - port == NULL", function); return -1; } // if (port->magic != USB_SERIAL_PORT_MAGIC) { // dbg("%s - bad magic number for port", function); // return -1; // } if (!port->serial) { dbg("%s - port->serial == NULL", function); return -1; } return 0; } static struct usb_serial *ATEN2011_get_usb_serial(struct usb_serial_port *port, const char *function) { /* if no port was specified, or it fails a paranoia check */ if (!port || ATEN2011_port_paranoia_check(port, function) || ATEN2011_serial_paranoia_check(port->serial, function)) { /* then say that we don't have a valid usb_serial thing, which will * end up genrating -ENODEV return values */ return NULL; } return port->serial; } /**************************************************************************** * ATENINTL2011_init * This is called by the module subsystem, or on startup to initialize us ****************************************************************************/ int __init ATENINTL2011_init(void) { int retval; DPRINTK("%s \n", " ATEN2011_init :entering.........."); /* Register with the usb serial */ retval = usb_serial_register(&ATENINTL2011_4port_device); if (retval) goto failed_port_device_register; /* info(DRIVER_DESC " " DRIVER_VERSION); */ printk(KERN_INFO KBUILD_MODNAME ":" DRIVER_DESC " " DRIVER_VERSION "\n"); /* Register with the usb */ retval = usb_register(&io_driver); if (retval) goto failed_usb_register; if (retval == 0) { DPRINTK("%s\n", "Leaving..."); return 0; } failed_usb_register: usb_serial_deregister(&ATENINTL2011_4port_device); failed_port_device_register: return retval; } /**************************************************************************** * ATENINTL2011_exit * Called when the driver is about to be unloaded. ****************************************************************************/ void __exit ATENINTL2011_exit(void) { DPRINTK("%s \n", " ATEN2011_exit :entering.........."); usb_deregister(&io_driver); usb_serial_deregister(&ATENINTL2011_4port_device); DPRINTK("%s\n", "End..."); } module_init(ATENINTL2011_init); module_exit(ATENINTL2011_exit); /* Module information */ MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); MODULE_PARM_DESC(debug, "Debug enabled or not");