Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Belkin USB Serial Adapter Driver |
| 3 | * |
| 4 | * Copyright (C) 2000 William Greathouse (wgreathouse@smva.com) |
Ben Minerds | 70f3c75 | 2012-04-28 13:36:35 +1000 | [diff] [blame] | 5 | * Copyright (C) 2000-2001 Greg Kroah-Hartman (greg@kroah.com) |
Johan Hovold | 2afd828 | 2010-05-15 17:53:53 +0200 | [diff] [blame] | 6 | * Copyright (C) 2010 Johan Hovold (jhovold@gmail.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * This program is largely derived from work by the linux-usb group |
| 9 | * and associated source files. Please see the usb/serial files for |
| 10 | * individual credits and copyrights. |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 11 | * |
Ben Minerds | 70f3c75 | 2012-04-28 13:36:35 +1000 | [diff] [blame] | 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | * |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 17 | * See Documentation/usb/usb-serial.txt for more information on using this |
| 18 | * driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | * |
| 20 | * TODO: |
| 21 | * -- Add true modem contol line query capability. Currently we track the |
| 22 | * states reported by the interrupt and the states we request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | * -- Add support for flush commands |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | */ |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/kernel.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/tty.h> |
| 31 | #include <linux/tty_driver.h> |
| 32 | #include <linux/tty_flip.h> |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/spinlock.h> |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 35 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 37 | #include <linux/usb/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "belkin_sa.h" |
| 39 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 40 | static bool debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | /* |
| 43 | * Version Information |
| 44 | */ |
Johan Hovold | 2afd828 | 2010-05-15 17:53:53 +0200 | [diff] [blame] | 45 | #define DRIVER_VERSION "v1.3" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #define DRIVER_AUTHOR "William Greathouse <wgreathouse@smva.com>" |
| 47 | #define DRIVER_DESC "USB Belkin Serial converter driver" |
| 48 | |
| 49 | /* function prototypes for a Belkin USB Serial Adapter F5U103 */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 50 | static int belkin_sa_startup(struct usb_serial *serial); |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 51 | static void belkin_sa_release(struct usb_serial *serial); |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 52 | static int belkin_sa_open(struct tty_struct *tty, |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 53 | struct usb_serial_port *port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 54 | static void belkin_sa_close(struct usb_serial_port *port); |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 55 | static void belkin_sa_read_int_callback(struct urb *urb); |
Johan Hovold | 2afd828 | 2010-05-15 17:53:53 +0200 | [diff] [blame] | 56 | static void belkin_sa_process_read_urb(struct urb *urb); |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 57 | static void belkin_sa_set_termios(struct tty_struct *tty, |
| 58 | struct usb_serial_port *port, struct ktermios * old); |
| 59 | static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state); |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 60 | static int belkin_sa_tiocmget(struct tty_struct *tty); |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 61 | static int belkin_sa_tiocmset(struct tty_struct *tty, |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 62 | unsigned int set, unsigned int clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 65 | static const struct usb_device_id id_table[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { USB_DEVICE(BELKIN_SA_VID, BELKIN_SA_PID) }, |
| 67 | { USB_DEVICE(BELKIN_OLD_VID, BELKIN_OLD_PID) }, |
| 68 | { USB_DEVICE(PERACOM_VID, PERACOM_PID) }, |
| 69 | { USB_DEVICE(GOHUBS_VID, GOHUBS_PID) }, |
| 70 | { USB_DEVICE(GOHUBS_VID, HANDYLINK_PID) }, |
| 71 | { USB_DEVICE(BELKIN_DOCKSTATION_VID, BELKIN_DOCKSTATION_PID) }, |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 72 | { } /* Terminating entry */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | }; |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 74 | MODULE_DEVICE_TABLE(usb, id_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
| 76 | /* All of the device info needed for the serial converters */ |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 77 | static struct usb_serial_driver belkin_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 78 | .driver = { |
| 79 | .owner = THIS_MODULE, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 80 | .name = "belkin", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 81 | }, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 82 | .description = "Belkin / Peracom / GoHubs USB Serial Adapter", |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 83 | .id_table = id_table, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | .num_ports = 1, |
| 85 | .open = belkin_sa_open, |
| 86 | .close = belkin_sa_close, |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 87 | .read_int_callback = belkin_sa_read_int_callback, |
Johan Hovold | 2afd828 | 2010-05-15 17:53:53 +0200 | [diff] [blame] | 88 | .process_read_urb = belkin_sa_process_read_urb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | .set_termios = belkin_sa_set_termios, |
| 90 | .break_ctl = belkin_sa_break_ctl, |
| 91 | .tiocmget = belkin_sa_tiocmget, |
| 92 | .tiocmset = belkin_sa_tiocmset, |
| 93 | .attach = belkin_sa_startup, |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 94 | .release = belkin_sa_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | }; |
| 96 | |
Alan Stern | 08a4f6b | 2012-02-23 14:56:17 -0500 | [diff] [blame] | 97 | static struct usb_serial_driver * const serial_drivers[] = { |
| 98 | &belkin_device, NULL |
| 99 | }; |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | struct belkin_sa_private { |
| 102 | spinlock_t lock; |
| 103 | unsigned long control_state; |
| 104 | unsigned char last_lsr; |
| 105 | unsigned char last_msr; |
| 106 | int bad_flow_control; |
| 107 | }; |
| 108 | |
| 109 | |
| 110 | /* |
| 111 | * *************************************************************************** |
| 112 | * Belkin USB Serial Adapter F5U103 specific driver functions |
| 113 | * *************************************************************************** |
| 114 | */ |
| 115 | |
| 116 | #define WDR_TIMEOUT 5000 /* default urb timeout */ |
| 117 | |
| 118 | /* assumes that struct usb_serial *serial is available */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 119 | #define BSA_USB_CMD(c, v) usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | (c), BELKIN_SA_SET_REQUEST_TYPE, \ |
| 121 | (v), 0, NULL, 0, WDR_TIMEOUT) |
| 122 | |
| 123 | /* do some startup allocations not currently performed by usb_serial_probe() */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 124 | static int belkin_sa_startup(struct usb_serial *serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | { |
| 126 | struct usb_device *dev = serial->dev; |
| 127 | struct belkin_sa_private *priv; |
| 128 | |
| 129 | /* allocate the private data structure */ |
| 130 | priv = kmalloc(sizeof(struct belkin_sa_private), GFP_KERNEL); |
| 131 | if (!priv) |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 132 | return -1; /* error */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | /* set initial values for control structures */ |
| 134 | spin_lock_init(&priv->lock); |
| 135 | priv->control_state = 0; |
| 136 | priv->last_lsr = 0; |
| 137 | priv->last_msr = 0; |
| 138 | /* see comments at top of file */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 139 | priv->bad_flow_control = |
| 140 | (le16_to_cpu(dev->descriptor.bcdDevice) <= 0x0206) ? 1 : 0; |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 141 | dev_info(&dev->dev, "bcdDevice: %04x, bfc: %d\n", |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 142 | le16_to_cpu(dev->descriptor.bcdDevice), |
| 143 | priv->bad_flow_control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | init_waitqueue_head(&serial->port[0]->write_wait); |
| 146 | usb_set_serial_port_data(serial->port[0], priv); |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 147 | |
| 148 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
| 150 | |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 151 | static void belkin_sa_release(struct usb_serial *serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | int i; |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 154 | |
Johan Hovold | 726ef42 | 2010-05-15 17:53:51 +0200 | [diff] [blame] | 155 | for (i = 0; i < serial->num_ports; ++i) |
| 156 | kfree(usb_get_serial_port_data(serial->port[i])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Johan Hovold | 726ef42 | 2010-05-15 17:53:51 +0200 | [diff] [blame] | 159 | static int belkin_sa_open(struct tty_struct *tty, |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 160 | struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | { |
Johan Hovold | f2f8b7f | 2010-05-15 17:53:52 +0200 | [diff] [blame] | 162 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
| 165 | if (retval) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 166 | dev_err(&port->dev, "usb_submit_urb(read int) failed\n"); |
Johan Hovold | f2f8b7f | 2010-05-15 17:53:52 +0200 | [diff] [blame] | 167 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Johan Hovold | f2f8b7f | 2010-05-15 17:53:52 +0200 | [diff] [blame] | 170 | retval = usb_serial_generic_open(tty, port); |
| 171 | if (retval) |
| 172 | usb_kill_urb(port->interrupt_in_urb); |
| 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | return retval; |
Johan Hovold | 726ef42 | 2010-05-15 17:53:51 +0200 | [diff] [blame] | 175 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 177 | static void belkin_sa_close(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
Johan Hovold | f26788d | 2010-03-17 23:00:45 +0100 | [diff] [blame] | 179 | usb_serial_generic_close(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | usb_kill_urb(port->interrupt_in_urb); |
Johan Hovold | 726ef42 | 2010-05-15 17:53:51 +0200 | [diff] [blame] | 181 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 183 | static void belkin_sa_read_int_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 185 | struct usb_serial_port *port = urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | struct belkin_sa_private *priv; |
| 187 | unsigned char *data = urb->transfer_buffer; |
| 188 | int retval; |
Greg Kroah-Hartman | f26aad2 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 189 | int status = urb->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | unsigned long flags; |
| 191 | |
Greg Kroah-Hartman | f26aad2 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 192 | switch (status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | case 0: |
| 194 | /* success */ |
| 195 | break; |
| 196 | case -ECONNRESET: |
| 197 | case -ENOENT: |
| 198 | case -ESHUTDOWN: |
| 199 | /* this urb is terminated, clean up */ |
Greg Kroah-Hartman | c89aa63 | 2012-05-15 16:27:11 -0700 | [diff] [blame^] | 200 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
| 201 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | return; |
| 203 | default: |
Greg Kroah-Hartman | c89aa63 | 2012-05-15 16:27:11 -0700 | [diff] [blame^] | 204 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
| 205 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | goto exit; |
| 207 | } |
| 208 | |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 209 | usb_serial_debug_data(debug, &port->dev, __func__, |
| 210 | urb->actual_length, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | /* Handle known interrupt data */ |
| 213 | /* ignore data[0] and data[1] */ |
| 214 | |
| 215 | priv = usb_get_serial_port_data(port); |
| 216 | spin_lock_irqsave(&priv->lock, flags); |
| 217 | priv->last_msr = data[BELKIN_SA_MSR_INDEX]; |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | /* Record Control Line states */ |
| 220 | if (priv->last_msr & BELKIN_SA_MSR_DSR) |
| 221 | priv->control_state |= TIOCM_DSR; |
| 222 | else |
| 223 | priv->control_state &= ~TIOCM_DSR; |
| 224 | |
| 225 | if (priv->last_msr & BELKIN_SA_MSR_CTS) |
| 226 | priv->control_state |= TIOCM_CTS; |
| 227 | else |
| 228 | priv->control_state &= ~TIOCM_CTS; |
| 229 | |
| 230 | if (priv->last_msr & BELKIN_SA_MSR_RI) |
| 231 | priv->control_state |= TIOCM_RI; |
| 232 | else |
| 233 | priv->control_state &= ~TIOCM_RI; |
| 234 | |
| 235 | if (priv->last_msr & BELKIN_SA_MSR_CD) |
| 236 | priv->control_state |= TIOCM_CD; |
| 237 | else |
| 238 | priv->control_state &= ~TIOCM_CD; |
| 239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | priv->last_lsr = data[BELKIN_SA_LSR_INDEX]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | spin_unlock_irqrestore(&priv->lock, flags); |
| 242 | exit: |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 243 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | if (retval) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 245 | dev_err(&port->dev, "%s - usb_submit_urb failed with " |
| 246 | "result %d\n", __func__, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
| 248 | |
Johan Hovold | 2afd828 | 2010-05-15 17:53:53 +0200 | [diff] [blame] | 249 | static void belkin_sa_process_read_urb(struct urb *urb) |
| 250 | { |
| 251 | struct usb_serial_port *port = urb->context; |
| 252 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); |
| 253 | struct tty_struct *tty; |
| 254 | unsigned char *data = urb->transfer_buffer; |
| 255 | unsigned long flags; |
| 256 | unsigned char status; |
| 257 | char tty_flag; |
| 258 | |
| 259 | /* Update line status */ |
| 260 | tty_flag = TTY_NORMAL; |
| 261 | |
| 262 | spin_lock_irqsave(&priv->lock, flags); |
| 263 | status = priv->last_lsr; |
| 264 | priv->last_lsr &= ~BELKIN_SA_LSR_ERR; |
| 265 | spin_unlock_irqrestore(&priv->lock, flags); |
| 266 | |
| 267 | if (!urb->actual_length) |
| 268 | return; |
| 269 | |
| 270 | tty = tty_port_tty_get(&port->port); |
| 271 | if (!tty) |
| 272 | return; |
| 273 | |
| 274 | if (status & BELKIN_SA_LSR_ERR) { |
| 275 | /* Break takes precedence over parity, which takes precedence |
| 276 | * over framing errors. */ |
| 277 | if (status & BELKIN_SA_LSR_BI) |
| 278 | tty_flag = TTY_BREAK; |
| 279 | else if (status & BELKIN_SA_LSR_PE) |
| 280 | tty_flag = TTY_PARITY; |
| 281 | else if (status & BELKIN_SA_LSR_FE) |
| 282 | tty_flag = TTY_FRAME; |
| 283 | dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag); |
| 284 | |
| 285 | /* Overrun is special, not associated with a char. */ |
| 286 | if (status & BELKIN_SA_LSR_OE) |
| 287 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
| 288 | } |
| 289 | |
| 290 | tty_insert_flip_string_fixed_flag(tty, data, tty_flag, |
| 291 | urb->actual_length); |
| 292 | tty_flip_buffer_push(tty); |
| 293 | tty_kref_put(tty); |
| 294 | } |
| 295 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 296 | static void belkin_sa_set_termios(struct tty_struct *tty, |
| 297 | struct usb_serial_port *port, struct ktermios *old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | { |
| 299 | struct usb_serial *serial = port->serial; |
| 300 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); |
| 301 | unsigned int iflag; |
| 302 | unsigned int cflag; |
| 303 | unsigned int old_iflag = 0; |
| 304 | unsigned int old_cflag = 0; |
| 305 | __u16 urb_value = 0; /* Will hold the new flags */ |
| 306 | unsigned long flags; |
| 307 | unsigned long control_state; |
| 308 | int bad_flow_control; |
Alan Cox | 9a8baec | 2007-06-22 14:40:18 +0100 | [diff] [blame] | 309 | speed_t baud; |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 310 | struct ktermios *termios = tty->termios; |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 311 | |
Alan Cox | 3ec466b | 2007-12-13 16:15:26 -0800 | [diff] [blame] | 312 | iflag = termios->c_iflag; |
| 313 | cflag = termios->c_cflag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Alan Cox | 3ec466b | 2007-12-13 16:15:26 -0800 | [diff] [blame] | 315 | termios->c_cflag &= ~CMSPAR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | /* get a local copy of the current port settings */ |
| 318 | spin_lock_irqsave(&priv->lock, flags); |
| 319 | control_state = priv->control_state; |
| 320 | bad_flow_control = priv->bad_flow_control; |
| 321 | spin_unlock_irqrestore(&priv->lock, flags); |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 322 | |
Alan Cox | 9a8baec | 2007-06-22 14:40:18 +0100 | [diff] [blame] | 323 | old_iflag = old_termios->c_iflag; |
| 324 | old_cflag = old_termios->c_cflag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | /* Set the baud rate */ |
Alan Cox | 3ec466b | 2007-12-13 16:15:26 -0800 | [diff] [blame] | 327 | if ((cflag & CBAUD) != (old_cflag & CBAUD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | /* reassert DTR and (maybe) RTS on transition from B0 */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 329 | if ((old_cflag & CBAUD) == B0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | control_state |= (TIOCM_DTR|TIOCM_RTS); |
| 331 | if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 1) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 332 | dev_err(&port->dev, "Set DTR error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | /* don't set RTS if using hardware flow control */ |
Alan Cox | 3ec466b | 2007-12-13 16:15:26 -0800 | [diff] [blame] | 334 | if (!(old_cflag & CRTSCTS)) |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 335 | if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST |
| 336 | , 1) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 337 | dev_err(&port->dev, "Set RTS error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
Alan Cox | 9a8baec | 2007-06-22 14:40:18 +0100 | [diff] [blame] | 339 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 341 | baud = tty_get_baud_rate(tty); |
Alan Cox | 3ec466b | 2007-12-13 16:15:26 -0800 | [diff] [blame] | 342 | if (baud) { |
| 343 | urb_value = BELKIN_SA_BAUD(baud); |
| 344 | /* Clip to maximum speed */ |
| 345 | if (urb_value == 0) |
| 346 | urb_value = 1; |
| 347 | /* Turn it back into a resulting real baud rate */ |
| 348 | baud = BELKIN_SA_BAUD(urb_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
Alan Cox | 3ec466b | 2007-12-13 16:15:26 -0800 | [diff] [blame] | 350 | /* Report the actual baud rate back to the caller */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 351 | tty_encode_baud_rate(tty, baud, baud); |
Alan Cox | 9a8baec | 2007-06-22 14:40:18 +0100 | [diff] [blame] | 352 | if (BSA_USB_CMD(BELKIN_SA_SET_BAUDRATE_REQUEST, urb_value) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 353 | dev_err(&port->dev, "Set baudrate error\n"); |
Alan Cox | 9a8baec | 2007-06-22 14:40:18 +0100 | [diff] [blame] | 354 | } else { |
| 355 | /* Disable flow control */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 356 | if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, |
| 357 | BELKIN_SA_FLOW_NONE) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 358 | dev_err(&port->dev, "Disable flowcontrol error\n"); |
Alan Cox | 9a8baec | 2007-06-22 14:40:18 +0100 | [diff] [blame] | 359 | /* Drop RTS and DTR */ |
| 360 | control_state &= ~(TIOCM_DTR | TIOCM_RTS); |
| 361 | if (BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, 0) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 362 | dev_err(&port->dev, "DTR LOW error\n"); |
Alan Cox | 9a8baec | 2007-06-22 14:40:18 +0100 | [diff] [blame] | 363 | if (BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, 0) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 364 | dev_err(&port->dev, "RTS LOW error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | /* set the parity */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 368 | if ((cflag ^ old_cflag) & (PARENB | PARODD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | if (cflag & PARENB) |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 370 | urb_value = (cflag & PARODD) ? BELKIN_SA_PARITY_ODD |
| 371 | : BELKIN_SA_PARITY_EVEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | else |
| 373 | urb_value = BELKIN_SA_PARITY_NONE; |
| 374 | if (BSA_USB_CMD(BELKIN_SA_SET_PARITY_REQUEST, urb_value) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 375 | dev_err(&port->dev, "Set parity error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | /* set the number of data bits */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 379 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | switch (cflag & CSIZE) { |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 381 | case CS5: |
| 382 | urb_value = BELKIN_SA_DATA_BITS(5); |
| 383 | break; |
| 384 | case CS6: |
| 385 | urb_value = BELKIN_SA_DATA_BITS(6); |
| 386 | break; |
| 387 | case CS7: |
| 388 | urb_value = BELKIN_SA_DATA_BITS(7); |
| 389 | break; |
| 390 | case CS8: |
| 391 | urb_value = BELKIN_SA_DATA_BITS(8); |
| 392 | break; |
Ben Minerds | 70f3c75 | 2012-04-28 13:36:35 +1000 | [diff] [blame] | 393 | default: |
Greg Kroah-Hartman | c89aa63 | 2012-05-15 16:27:11 -0700 | [diff] [blame^] | 394 | dev_dbg(&port->dev, |
| 395 | "CSIZE was not CS5-CS8, using default of 8\n"); |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 396 | urb_value = BELKIN_SA_DATA_BITS(8); |
| 397 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
| 399 | if (BSA_USB_CMD(BELKIN_SA_SET_DATA_BITS_REQUEST, urb_value) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 400 | dev_err(&port->dev, "Set data bits error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | /* set the number of stop bits */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 404 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { |
| 405 | urb_value = (cflag & CSTOPB) ? BELKIN_SA_STOP_BITS(2) |
| 406 | : BELKIN_SA_STOP_BITS(1); |
| 407 | if (BSA_USB_CMD(BELKIN_SA_SET_STOP_BITS_REQUEST, |
| 408 | urb_value) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 409 | dev_err(&port->dev, "Set stop bits error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
| 411 | |
| 412 | /* Set flow control */ |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 413 | if (((iflag ^ old_iflag) & (IXOFF | IXON)) || |
| 414 | ((cflag ^ old_cflag) & CRTSCTS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | urb_value = 0; |
| 416 | if ((iflag & IXOFF) || (iflag & IXON)) |
| 417 | urb_value |= (BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON); |
| 418 | else |
| 419 | urb_value &= ~(BELKIN_SA_FLOW_OXON | BELKIN_SA_FLOW_IXON); |
| 420 | |
| 421 | if (cflag & CRTSCTS) |
| 422 | urb_value |= (BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS); |
| 423 | else |
| 424 | urb_value &= ~(BELKIN_SA_FLOW_OCTS | BELKIN_SA_FLOW_IRTS); |
| 425 | |
| 426 | if (bad_flow_control) |
| 427 | urb_value &= ~(BELKIN_SA_FLOW_IRTS); |
| 428 | |
| 429 | if (BSA_USB_CMD(BELKIN_SA_SET_FLOW_CTRL_REQUEST, urb_value) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 430 | dev_err(&port->dev, "Set flow control error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | /* save off the modified port settings */ |
| 434 | spin_lock_irqsave(&priv->lock, flags); |
| 435 | priv->control_state = control_state; |
| 436 | spin_unlock_irqrestore(&priv->lock, flags); |
Johan Hovold | 726ef42 | 2010-05-15 17:53:51 +0200 | [diff] [blame] | 437 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 439 | static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 441 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | struct usb_serial *serial = port->serial; |
| 443 | |
| 444 | if (BSA_USB_CMD(BELKIN_SA_SET_BREAK_REQUEST, break_state ? 1 : 0) < 0) |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 445 | dev_err(&port->dev, "Set break_ctl %d\n", break_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | } |
| 447 | |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 448 | static int belkin_sa_tiocmget(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 450 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); |
| 452 | unsigned long control_state; |
| 453 | unsigned long flags; |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | spin_lock_irqsave(&priv->lock, flags); |
| 456 | control_state = priv->control_state; |
| 457 | spin_unlock_irqrestore(&priv->lock, flags); |
| 458 | |
| 459 | return control_state; |
| 460 | } |
| 461 | |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 462 | static int belkin_sa_tiocmset(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | unsigned int set, unsigned int clear) |
| 464 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 465 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | struct usb_serial *serial = port->serial; |
| 467 | struct belkin_sa_private *priv = usb_get_serial_port_data(port); |
| 468 | unsigned long control_state; |
| 469 | unsigned long flags; |
| 470 | int retval; |
| 471 | int rts = 0; |
| 472 | int dtr = 0; |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | spin_lock_irqsave(&priv->lock, flags); |
| 475 | control_state = priv->control_state; |
| 476 | |
| 477 | if (set & TIOCM_RTS) { |
| 478 | control_state |= TIOCM_RTS; |
| 479 | rts = 1; |
| 480 | } |
| 481 | if (set & TIOCM_DTR) { |
| 482 | control_state |= TIOCM_DTR; |
| 483 | dtr = 1; |
| 484 | } |
| 485 | if (clear & TIOCM_RTS) { |
| 486 | control_state &= ~TIOCM_RTS; |
| 487 | rts = 0; |
| 488 | } |
| 489 | if (clear & TIOCM_DTR) { |
| 490 | control_state &= ~TIOCM_DTR; |
| 491 | dtr = 0; |
| 492 | } |
| 493 | |
| 494 | priv->control_state = control_state; |
| 495 | spin_unlock_irqrestore(&priv->lock, flags); |
| 496 | |
| 497 | retval = BSA_USB_CMD(BELKIN_SA_SET_RTS_REQUEST, rts); |
| 498 | if (retval < 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 499 | dev_err(&port->dev, "Set RTS error %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | goto exit; |
| 501 | } |
| 502 | |
| 503 | retval = BSA_USB_CMD(BELKIN_SA_SET_DTR_REQUEST, dtr); |
| 504 | if (retval < 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 505 | dev_err(&port->dev, "Set DTR error %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | goto exit; |
| 507 | } |
| 508 | exit: |
| 509 | return retval; |
| 510 | } |
| 511 | |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 512 | module_usb_serial_driver(serial_drivers, id_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
Alan Cox | b69c149 | 2008-07-22 11:09:39 +0100 | [diff] [blame] | 514 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 515 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 516 | MODULE_VERSION(DRIVER_VERSION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | MODULE_LICENSE("GPL"); |
| 518 | |
| 519 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 520 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |