| /* |
| * USB Keyspan PDA / Xircom / Entregra Converter driver |
| * |
| * Copyright (C) 1999 - 2001 Greg Kroah-Hartman <greg@kroah.com> |
| * Copyright (C) 1999, 2000 Brian Warner <warner@lothar.com> |
| * Copyright (C) 2000 Al Borchers <borchers@steinerpoint.com> |
| * |
| * 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. |
| * |
| * See Documentation/usb/usb-serial.txt for more information on using this driver |
| * |
| * (09/07/2001) gkh |
| * cleaned up the Xircom support. Added ids for Entregra device which is |
| * the same as the Xircom device. Enabled the code to be compiled for |
| * either Xircom or Keyspan devices. |
| * |
| * (08/11/2001) Cristian M. Craciunescu |
| * support for Xircom PGSDB9 |
| * |
| * (05/31/2001) gkh |
| * switched from using spinlock to a semaphore, which fixes lots of problems. |
| * |
| * (04/08/2001) gb |
| * Identify version on module load. |
| * |
| * (11/01/2000) Adam J. Richter |
| * usb_device_id table support |
| * |
| * (10/05/2000) gkh |
| * Fixed bug with urb->dev not being set properly, now that the usb |
| * core needs it. |
| * |
| * (08/28/2000) gkh |
| * Added locks for SMP safeness. |
| * Fixed MOD_INC and MOD_DEC logic and the ability to open a port more |
| * than once. |
| * |
| * (07/20/2000) borchers |
| * - keyspan_pda_write no longer sleeps if it is called on interrupt time; |
| * PPP and the line discipline with stty echo on can call write on |
| * interrupt time and this would cause an oops if write slept |
| * - if keyspan_pda_write is in an interrupt, it will not call |
| * usb_control_msg (which sleeps) to query the room in the device |
| * buffer, it simply uses the current room value it has |
| * - if the urb is busy or if it is throttled keyspan_pda_write just |
| * returns 0, rather than sleeping to wait for this to change; the |
| * write_chan code in n_tty.c will sleep if needed before calling |
| * keyspan_pda_write again |
| * - if the device needs to be unthrottled, write now queues up the |
| * call to usb_control_msg (which sleeps) to unthrottle the device |
| * - the wakeups from keyspan_pda_write_bulk_callback are queued rather |
| * than done directly from the callback to avoid the race in write_chan |
| * - keyspan_pda_chars_in_buffer also indicates its buffer is full if the |
| * urb status is -EINPROGRESS, meaning it cannot write at the moment |
| * |
| * (07/19/2000) gkh |
| * Added module_init and module_exit functions to handle the fact that this |
| * driver is a loadable module now. |
| * |
| * (03/26/2000) gkh |
| * Split driver up into device specific pieces. |
| * |
| */ |
| |
| |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/tty_driver.h> |
| #include <linux/tty_flip.h> |
| #include <linux/module.h> |
| #include <linux/spinlock.h> |
| #include <linux/workqueue.h> |
| #include <asm/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/usb/serial.h> |
| |
| static int debug; |
| |
| struct ezusb_hex_record { |
| __u16 address; |
| __u8 data_size; |
| __u8 data[16]; |
| }; |
| |
| /* make a simple define to handle if we are compiling keyspan_pda or xircom support */ |
| #if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE) |
| #define KEYSPAN |
| #else |
| #undef KEYSPAN |
| #endif |
| #if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE) |
| #define XIRCOM |
| #else |
| #undef XIRCOM |
| #endif |
| |
| #ifdef KEYSPAN |
| #include "keyspan_pda_fw.h" |
| #endif |
| |
| #ifdef XIRCOM |
| #include "xircom_pgs_fw.h" |
| #endif |
| |
| /* |
| * Version Information |
| */ |
| #define DRIVER_VERSION "v1.1" |
| #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>" |
| #define DRIVER_DESC "USB Keyspan PDA Converter driver" |
| |
| struct keyspan_pda_private { |
| int tx_room; |
| int tx_throttled; |
| struct work_struct wakeup_work; |
| struct work_struct unthrottle_work; |
| }; |
| |
| |
| #define KEYSPAN_VENDOR_ID 0x06cd |
| #define KEYSPAN_PDA_FAKE_ID 0x0103 |
| #define KEYSPAN_PDA_ID 0x0104 /* no clue */ |
| |
| /* For Xircom PGSDB9 and older Entregra version of the same device */ |
| #define XIRCOM_VENDOR_ID 0x085a |
| #define XIRCOM_FAKE_ID 0x8027 |
| #define ENTREGRA_VENDOR_ID 0x1645 |
| #define ENTREGRA_FAKE_ID 0x8093 |
| |
| static struct usb_device_id id_table_combined [] = { |
| #ifdef KEYSPAN |
| { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, |
| #endif |
| #ifdef XIRCOM |
| { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, |
| { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) }, |
| #endif |
| { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, |
| { } /* Terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE (usb, id_table_combined); |
| |
| static struct usb_driver keyspan_pda_driver = { |
| .name = "keyspan_pda", |
| .probe = usb_serial_probe, |
| .disconnect = usb_serial_disconnect, |
| .id_table = id_table_combined, |
| .no_dynamic_id = 1, |
| }; |
| |
| static struct usb_device_id id_table_std [] = { |
| { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, |
| { } /* Terminating entry */ |
| }; |
| |
| #ifdef KEYSPAN |
| static struct usb_device_id id_table_fake [] = { |
| { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, |
| { } /* Terminating entry */ |
| }; |
| #endif |
| |
| #ifdef XIRCOM |
| static struct usb_device_id id_table_fake_xircom [] = { |
| { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, |
| { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) }, |
| { } |
| }; |
| #endif |
| |
| static void keyspan_pda_wakeup_write( struct usb_serial_port *port ) |
| { |
| |
| struct tty_struct *tty = port->tty; |
| |
| /* wake up port processes */ |
| wake_up_interruptible( &port->write_wait ); |
| |
| /* wake up line discipline */ |
| tty_wakeup(tty); |
| } |
| |
| static void keyspan_pda_request_unthrottle( struct usb_serial *serial ) |
| { |
| int result; |
| |
| dbg(" request_unthrottle"); |
| /* ask the device to tell us when the tx buffer becomes |
| sufficiently empty */ |
| result = usb_control_msg(serial->dev, |
| usb_sndctrlpipe(serial->dev, 0), |
| 7, /* request_unthrottle */ |
| USB_TYPE_VENDOR | USB_RECIP_INTERFACE |
| | USB_DIR_OUT, |
| 16, /* value: threshold */ |
| 0, /* index */ |
| NULL, |
| 0, |
| 2000); |
| if (result < 0) |
| dbg("%s - error %d from usb_control_msg", |
| __FUNCTION__, result); |
| } |
| |
| |
| static void keyspan_pda_rx_interrupt (struct urb *urb, struct pt_regs *regs) |
| { |
| struct usb_serial_port *port = (struct usb_serial_port *)urb->context; |
| struct tty_struct *tty = port->tty; |
| unsigned char *data = urb->transfer_buffer; |
| int i; |
| int status; |
| struct keyspan_pda_private *priv; |
| priv = usb_get_serial_port_data(port); |
| |
| 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; |
| } |
| |
| /* see if the message is data or a status interrupt */ |
| switch (data[0]) { |
| case 0: |
| /* rest of message is rx data */ |
| if (urb->actual_length) { |
| for (i = 1; i < urb->actual_length ; ++i) { |
| tty_insert_flip_char(tty, data[i], 0); |
| } |
| tty_flip_buffer_push(tty); |
| } |
| break; |
| case 1: |
| /* status interrupt */ |
| dbg(" rx int, d1=%d, d2=%d", data[1], data[2]); |
| switch (data[1]) { |
| case 1: /* modemline change */ |
| break; |
| case 2: /* tx unthrottle interrupt */ |
| priv->tx_throttled = 0; |
| /* queue up a wakeup at scheduler time */ |
| schedule_work(&priv->wakeup_work); |
| break; |
| default: |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| exit: |
| status = usb_submit_urb (urb, GFP_ATOMIC); |
| if (status) |
| err ("%s - usb_submit_urb failed with result %d", |
| __FUNCTION__, status); |
| } |
| |
| |
| static void keyspan_pda_rx_throttle (struct usb_serial_port *port) |
| { |
| /* stop receiving characters. We just turn off the URB request, and |
| let chars pile up in the device. If we're doing hardware |
| flowcontrol, the device will signal the other end when its buffer |
| fills up. If we're doing XON/XOFF, this would be a good time to |
| send an XOFF, although it might make sense to foist that off |
| upon the device too. */ |
| |
| dbg("keyspan_pda_rx_throttle port %d", port->number); |
| usb_kill_urb(port->interrupt_in_urb); |
| } |
| |
| |
| static void keyspan_pda_rx_unthrottle (struct usb_serial_port *port) |
| { |
| /* just restart the receive interrupt URB */ |
| dbg("keyspan_pda_rx_unthrottle port %d", port->number); |
| port->interrupt_in_urb->dev = port->serial->dev; |
| if (usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC)) |
| dbg(" usb_submit_urb(read urb) failed"); |
| return; |
| } |
| |
| |
| static int keyspan_pda_setbaud (struct usb_serial *serial, int baud) |
| { |
| int rc; |
| int bindex; |
| |
| switch(baud) { |
| case 110: bindex = 0; break; |
| case 300: bindex = 1; break; |
| case 1200: bindex = 2; break; |
| case 2400: bindex = 3; break; |
| case 4800: bindex = 4; break; |
| case 9600: bindex = 5; break; |
| case 19200: bindex = 6; break; |
| case 38400: bindex = 7; break; |
| case 57600: bindex = 8; break; |
| case 115200: bindex = 9; break; |
| default: return -EINVAL; |
| } |
| |
| /* rather than figure out how to sleep while waiting for this |
| to complete, I just use the "legacy" API. */ |
| rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 0, /* set baud */ |
| USB_TYPE_VENDOR |
| | USB_RECIP_INTERFACE |
| | USB_DIR_OUT, /* type */ |
| bindex, /* value */ |
| 0, /* index */ |
| NULL, /* &data */ |
| 0, /* size */ |
| 2000); /* timeout */ |
| return(rc); |
| } |
| |
| |
| static void keyspan_pda_break_ctl (struct usb_serial_port *port, int break_state) |
| { |
| struct usb_serial *serial = port->serial; |
| int value; |
| int result; |
| |
| if (break_state == -1) |
| value = 1; /* start break */ |
| else |
| value = 0; /* clear break */ |
| result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 4, /* set break */ |
| USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, |
| value, 0, NULL, 0, 2000); |
| if (result < 0) |
| dbg("%s - error %d from usb_control_msg", |
| __FUNCTION__, result); |
| /* there is something funky about this.. the TCSBRK that 'cu' performs |
| ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4 |
| seconds apart, but it feels like the break sent isn't as long as it |
| is on /dev/ttyS0 */ |
| } |
| |
| |
| static void keyspan_pda_set_termios (struct usb_serial_port *port, |
| struct termios *old_termios) |
| { |
| struct usb_serial *serial = port->serial; |
| unsigned int cflag = port->tty->termios->c_cflag; |
| |
| /* cflag specifies lots of stuff: number of stop bits, parity, number |
| of data bits, baud. What can the device actually handle?: |
| CSTOPB (1 stop bit or 2) |
| PARENB (parity) |
| CSIZE (5bit .. 8bit) |
| There is minimal hw support for parity (a PSW bit seems to hold the |
| parity of whatever is in the accumulator). The UART either deals |
| with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data, |
| 1 special, stop). So, with firmware changes, we could do: |
| 8N1: 10 bit |
| 8N2: 11 bit, extra bit always (mark?) |
| 8[EOMS]1: 11 bit, extra bit is parity |
| 7[EOMS]1: 10 bit, b0/b7 is parity |
| 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?) |
| |
| HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS |
| bit. |
| |
| For now, just do baud. */ |
| |
| switch (cflag & CBAUD) { |
| /* we could support more values here, just need to calculate |
| the necessary divisors in the firmware. <asm/termbits.h> |
| has the Bnnn constants. */ |
| case B110: keyspan_pda_setbaud(serial, 110); break; |
| case B300: keyspan_pda_setbaud(serial, 300); break; |
| case B1200: keyspan_pda_setbaud(serial, 1200); break; |
| case B2400: keyspan_pda_setbaud(serial, 2400); break; |
| case B4800: keyspan_pda_setbaud(serial, 4800); break; |
| case B9600: keyspan_pda_setbaud(serial, 9600); break; |
| case B19200: keyspan_pda_setbaud(serial, 19200); break; |
| case B38400: keyspan_pda_setbaud(serial, 38400); break; |
| case B57600: keyspan_pda_setbaud(serial, 57600); break; |
| case B115200: keyspan_pda_setbaud(serial, 115200); break; |
| default: dbg("can't handle requested baud rate"); break; |
| } |
| } |
| |
| |
| /* modem control pins: DTR and RTS are outputs and can be controlled. |
| DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be |
| read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */ |
| |
| static int keyspan_pda_get_modem_info(struct usb_serial *serial, |
| unsigned char *value) |
| { |
| int rc; |
| unsigned char data; |
| rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| 3, /* get pins */ |
| USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN, |
| 0, 0, &data, 1, 2000); |
| if (rc > 0) |
| *value = data; |
| return rc; |
| } |
| |
| |
| static int keyspan_pda_set_modem_info(struct usb_serial *serial, |
| unsigned char value) |
| { |
| int rc; |
| rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 3, /* set pins */ |
| USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT, |
| value, 0, NULL, 0, 2000); |
| return rc; |
| } |
| |
| static int keyspan_pda_tiocmget(struct usb_serial_port *port, struct file *file) |
| { |
| struct usb_serial *serial = port->serial; |
| int rc; |
| unsigned char status; |
| int value; |
| |
| rc = keyspan_pda_get_modem_info(serial, &status); |
| if (rc < 0) |
| return rc; |
| value = |
| ((status & (1<<7)) ? TIOCM_DTR : 0) | |
| ((status & (1<<6)) ? TIOCM_CAR : 0) | |
| ((status & (1<<5)) ? TIOCM_RNG : 0) | |
| ((status & (1<<4)) ? TIOCM_DSR : 0) | |
| ((status & (1<<3)) ? TIOCM_CTS : 0) | |
| ((status & (1<<2)) ? TIOCM_RTS : 0); |
| return value; |
| } |
| |
| static int keyspan_pda_tiocmset(struct usb_serial_port *port, struct file *file, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial *serial = port->serial; |
| int rc; |
| unsigned char status; |
| |
| rc = keyspan_pda_get_modem_info(serial, &status); |
| if (rc < 0) |
| return rc; |
| |
| if (set & TIOCM_RTS) |
| status |= (1<<2); |
| if (set & TIOCM_DTR) |
| status |= (1<<7); |
| |
| if (clear & TIOCM_RTS) |
| status &= ~(1<<2); |
| if (clear & TIOCM_DTR) |
| status &= ~(1<<7); |
| rc = keyspan_pda_set_modem_info(serial, status); |
| return rc; |
| } |
| |
| static int keyspan_pda_ioctl(struct usb_serial_port *port, struct file *file, |
| unsigned int cmd, unsigned long arg) |
| { |
| switch (cmd) { |
| case TIOCMIWAIT: |
| /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/ |
| /* TODO */ |
| case TIOCGICOUNT: |
| /* return count of modemline transitions */ |
| return 0; /* TODO */ |
| } |
| |
| return -ENOIOCTLCMD; |
| } |
| |
| static int keyspan_pda_write(struct usb_serial_port *port, |
| const unsigned char *buf, int count) |
| { |
| struct usb_serial *serial = port->serial; |
| int request_unthrottle = 0; |
| int rc = 0; |
| struct keyspan_pda_private *priv; |
| |
| priv = usb_get_serial_port_data(port); |
| /* guess how much room is left in the device's ring buffer, and if we |
| want to send more than that, check first, updating our notion of |
| what is left. If our write will result in no room left, ask the |
| device to give us an interrupt when the room available rises above |
| a threshold, and hold off all writers (eventually, those using |
| select() or poll() too) until we receive that unthrottle interrupt. |
| Block if we can't write anything at all, otherwise write as much as |
| we can. */ |
| dbg("keyspan_pda_write(%d)",count); |
| if (count == 0) { |
| dbg(" write request of 0 bytes"); |
| return (0); |
| } |
| |
| /* we might block because of: |
| the TX urb is in-flight (wait until it completes) |
| the device is full (wait until it says there is room) |
| */ |
| spin_lock_bh(&port->lock); |
| if (port->write_urb_busy || priv->tx_throttled) { |
| spin_unlock_bh(&port->lock); |
| return 0; |
| } |
| port->write_urb_busy = 1; |
| spin_unlock_bh(&port->lock); |
| |
| /* At this point the URB is in our control, nobody else can submit it |
| again (the only sudden transition was the one from EINPROGRESS to |
| finished). Also, the tx process is not throttled. So we are |
| ready to write. */ |
| |
| count = (count > port->bulk_out_size) ? port->bulk_out_size : count; |
| |
| /* Check if we might overrun the Tx buffer. If so, ask the |
| device how much room it really has. This is done only on |
| scheduler time, since usb_control_msg() sleeps. */ |
| if (count > priv->tx_room && !in_interrupt()) { |
| unsigned char room; |
| rc = usb_control_msg(serial->dev, |
| usb_rcvctrlpipe(serial->dev, 0), |
| 6, /* write_room */ |
| USB_TYPE_VENDOR | USB_RECIP_INTERFACE |
| | USB_DIR_IN, |
| 0, /* value: 0 means "remaining room" */ |
| 0, /* index */ |
| &room, |
| 1, |
| 2000); |
| if (rc < 0) { |
| dbg(" roomquery failed"); |
| goto exit; |
| } |
| if (rc == 0) { |
| dbg(" roomquery returned 0 bytes"); |
| rc = -EIO; /* device didn't return any data */ |
| goto exit; |
| } |
| dbg(" roomquery says %d", room); |
| priv->tx_room = room; |
| } |
| if (count > priv->tx_room) { |
| /* we're about to completely fill the Tx buffer, so |
| we'll be throttled afterwards. */ |
| count = priv->tx_room; |
| request_unthrottle = 1; |
| } |
| |
| if (count) { |
| /* now transfer data */ |
| memcpy (port->write_urb->transfer_buffer, buf, count); |
| /* send the data out the bulk port */ |
| port->write_urb->transfer_buffer_length = count; |
| |
| priv->tx_room -= count; |
| |
| port->write_urb->dev = port->serial->dev; |
| rc = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
| if (rc) { |
| dbg(" usb_submit_urb(write bulk) failed"); |
| goto exit; |
| } |
| } |
| else { |
| /* There wasn't any room left, so we are throttled until |
| the buffer empties a bit */ |
| request_unthrottle = 1; |
| } |
| |
| if (request_unthrottle) { |
| priv->tx_throttled = 1; /* block writers */ |
| schedule_work(&priv->unthrottle_work); |
| } |
| |
| rc = count; |
| exit: |
| if (rc < 0) |
| port->write_urb_busy = 0; |
| return rc; |
| } |
| |
| |
| static void keyspan_pda_write_bulk_callback (struct urb *urb, struct pt_regs *regs) |
| { |
| struct usb_serial_port *port = (struct usb_serial_port *)urb->context; |
| struct keyspan_pda_private *priv; |
| |
| port->write_urb_busy = 0; |
| priv = usb_get_serial_port_data(port); |
| |
| /* queue up a wakeup at scheduler time */ |
| schedule_work(&priv->wakeup_work); |
| } |
| |
| |
| static int keyspan_pda_write_room (struct usb_serial_port *port) |
| { |
| struct keyspan_pda_private *priv; |
| |
| priv = usb_get_serial_port_data(port); |
| |
| /* used by n_tty.c for processing of tabs and such. Giving it our |
| conservative guess is probably good enough, but needs testing by |
| running a console through the device. */ |
| |
| return (priv->tx_room); |
| } |
| |
| |
| static int keyspan_pda_chars_in_buffer (struct usb_serial_port *port) |
| { |
| struct keyspan_pda_private *priv; |
| |
| priv = usb_get_serial_port_data(port); |
| |
| /* when throttled, return at least WAKEUP_CHARS to tell select() (via |
| n_tty.c:normal_poll() ) that we're not writeable. */ |
| if (port->write_urb_busy || priv->tx_throttled) |
| return 256; |
| return 0; |
| } |
| |
| |
| static int keyspan_pda_open (struct usb_serial_port *port, struct file *filp) |
| { |
| struct usb_serial *serial = port->serial; |
| unsigned char room; |
| int rc = 0; |
| struct keyspan_pda_private *priv; |
| |
| /* find out how much room is in the Tx ring */ |
| rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| 6, /* write_room */ |
| USB_TYPE_VENDOR | USB_RECIP_INTERFACE |
| | USB_DIR_IN, |
| 0, /* value */ |
| 0, /* index */ |
| &room, |
| 1, |
| 2000); |
| if (rc < 0) { |
| dbg("%s - roomquery failed", __FUNCTION__); |
| goto error; |
| } |
| if (rc == 0) { |
| dbg("%s - roomquery returned 0 bytes", __FUNCTION__); |
| rc = -EIO; |
| goto error; |
| } |
| priv = usb_get_serial_port_data(port); |
| priv->tx_room = room; |
| priv->tx_throttled = room ? 0 : 1; |
| |
| /* the normal serial device seems to always turn on DTR and RTS here, |
| so do the same */ |
| if (port->tty->termios->c_cflag & CBAUD) |
| keyspan_pda_set_modem_info(serial, (1<<7) | (1<<2) ); |
| else |
| keyspan_pda_set_modem_info(serial, 0); |
| |
| /*Start reading from the device*/ |
| port->interrupt_in_urb->dev = serial->dev; |
| rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
| if (rc) { |
| dbg("%s - usb_submit_urb(read int) failed", __FUNCTION__); |
| goto error; |
| } |
| |
| error: |
| return rc; |
| } |
| |
| |
| static void keyspan_pda_close(struct usb_serial_port *port, struct file *filp) |
| { |
| struct usb_serial *serial = port->serial; |
| |
| if (serial->dev) { |
| /* the normal serial device seems to always shut off DTR and RTS now */ |
| if (port->tty->termios->c_cflag & HUPCL) |
| keyspan_pda_set_modem_info(serial, 0); |
| |
| /* shutdown our bulk reads and writes */ |
| usb_kill_urb(port->write_urb); |
| usb_kill_urb(port->interrupt_in_urb); |
| } |
| } |
| |
| |
| /* download the firmware to a "fake" device (pre-renumeration) */ |
| static int keyspan_pda_fake_startup (struct usb_serial *serial) |
| { |
| int response; |
| const struct ezusb_hex_record *record = NULL; |
| |
| /* download the firmware here ... */ |
| response = ezusb_set_reset(serial, 1); |
| |
| #ifdef KEYSPAN |
| if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID) |
| record = &keyspan_pda_firmware[0]; |
| #endif |
| #ifdef XIRCOM |
| if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) || |
| (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID)) |
| record = &xircom_pgs_firmware[0]; |
| #endif |
| if (record == NULL) { |
| err("%s: unknown vendor, aborting.", __FUNCTION__); |
| return -ENODEV; |
| } |
| |
| while(record->address != 0xffff) { |
| response = ezusb_writememory(serial, record->address, |
| (unsigned char *)record->data, |
| record->data_size, 0xa0); |
| if (response < 0) { |
| err("ezusb_writememory failed for Keyspan PDA " |
| "firmware (%d %04X %p %d)", |
| response, |
| record->address, record->data, record->data_size); |
| break; |
| } |
| record++; |
| } |
| /* bring device out of reset. Renumeration will occur in a moment |
| and the new device will bind to the real driver */ |
| response = ezusb_set_reset(serial, 0); |
| |
| /* we want this device to fail to have a driver assigned to it. */ |
| return (1); |
| } |
| |
| static int keyspan_pda_startup (struct usb_serial *serial) |
| { |
| |
| struct keyspan_pda_private *priv; |
| |
| /* allocate the private data structures for all ports. Well, for all |
| one ports. */ |
| |
| priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL); |
| if (!priv) |
| return (1); /* error */ |
| usb_set_serial_port_data(serial->port[0], priv); |
| init_waitqueue_head(&serial->port[0]->write_wait); |
| INIT_WORK(&priv->wakeup_work, (void *)keyspan_pda_wakeup_write, |
| (void *)(serial->port[0])); |
| INIT_WORK(&priv->unthrottle_work, |
| (void *)keyspan_pda_request_unthrottle, |
| (void *)(serial)); |
| return (0); |
| } |
| |
| static void keyspan_pda_shutdown (struct usb_serial *serial) |
| { |
| dbg("%s", __FUNCTION__); |
| |
| kfree(usb_get_serial_port_data(serial->port[0])); |
| } |
| |
| #ifdef KEYSPAN |
| static struct usb_serial_driver keyspan_pda_fake_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "keyspan_pda_pre", |
| }, |
| .description = "Keyspan PDA - (prerenumeration)", |
| .id_table = id_table_fake, |
| .num_interrupt_in = NUM_DONT_CARE, |
| .num_bulk_in = NUM_DONT_CARE, |
| .num_bulk_out = NUM_DONT_CARE, |
| .num_ports = 1, |
| .attach = keyspan_pda_fake_startup, |
| }; |
| #endif |
| |
| #ifdef XIRCOM |
| static struct usb_serial_driver xircom_pgs_fake_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "xircom_no_firm", |
| }, |
| .description = "Xircom / Entregra PGS - (prerenumeration)", |
| .id_table = id_table_fake_xircom, |
| .num_interrupt_in = NUM_DONT_CARE, |
| .num_bulk_in = NUM_DONT_CARE, |
| .num_bulk_out = NUM_DONT_CARE, |
| .num_ports = 1, |
| .attach = keyspan_pda_fake_startup, |
| }; |
| #endif |
| |
| static struct usb_serial_driver keyspan_pda_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "keyspan_pda", |
| }, |
| .description = "Keyspan PDA", |
| .id_table = id_table_std, |
| .num_interrupt_in = 1, |
| .num_bulk_in = 0, |
| .num_bulk_out = 1, |
| .num_ports = 1, |
| .open = keyspan_pda_open, |
| .close = keyspan_pda_close, |
| .write = keyspan_pda_write, |
| .write_room = keyspan_pda_write_room, |
| .write_bulk_callback = keyspan_pda_write_bulk_callback, |
| .read_int_callback = keyspan_pda_rx_interrupt, |
| .chars_in_buffer = keyspan_pda_chars_in_buffer, |
| .throttle = keyspan_pda_rx_throttle, |
| .unthrottle = keyspan_pda_rx_unthrottle, |
| .ioctl = keyspan_pda_ioctl, |
| .set_termios = keyspan_pda_set_termios, |
| .break_ctl = keyspan_pda_break_ctl, |
| .tiocmget = keyspan_pda_tiocmget, |
| .tiocmset = keyspan_pda_tiocmset, |
| .attach = keyspan_pda_startup, |
| .shutdown = keyspan_pda_shutdown, |
| }; |
| |
| |
| static int __init keyspan_pda_init (void) |
| { |
| int retval; |
| retval = usb_serial_register(&keyspan_pda_device); |
| if (retval) |
| goto failed_pda_register; |
| #ifdef KEYSPAN |
| retval = usb_serial_register(&keyspan_pda_fake_device); |
| if (retval) |
| goto failed_pda_fake_register; |
| #endif |
| #ifdef XIRCOM |
| retval = usb_serial_register(&xircom_pgs_fake_device); |
| if (retval) |
| goto failed_xircom_register; |
| #endif |
| retval = usb_register(&keyspan_pda_driver); |
| if (retval) |
| goto failed_usb_register; |
| info(DRIVER_DESC " " DRIVER_VERSION); |
| return 0; |
| failed_usb_register: |
| #ifdef XIRCOM |
| usb_serial_deregister(&xircom_pgs_fake_device); |
| failed_xircom_register: |
| #endif /* XIRCOM */ |
| #ifdef KEYSPAN |
| usb_serial_deregister(&keyspan_pda_fake_device); |
| #endif |
| #ifdef KEYSPAN |
| failed_pda_fake_register: |
| #endif |
| usb_serial_deregister(&keyspan_pda_device); |
| failed_pda_register: |
| return retval; |
| } |
| |
| |
| static void __exit keyspan_pda_exit (void) |
| { |
| usb_deregister (&keyspan_pda_driver); |
| usb_serial_deregister (&keyspan_pda_device); |
| #ifdef KEYSPAN |
| usb_serial_deregister (&keyspan_pda_fake_device); |
| #endif |
| #ifdef XIRCOM |
| usb_serial_deregister (&xircom_pgs_fake_device); |
| #endif |
| } |
| |
| |
| module_init(keyspan_pda_init); |
| module_exit(keyspan_pda_exit); |
| |
| MODULE_AUTHOR( DRIVER_AUTHOR ); |
| MODULE_DESCRIPTION( DRIVER_DESC ); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(debug, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug enabled or not"); |
| |