Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * USB Serial Converter Generic functions |
| 3 | * |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 4 | * Copyright (C) 2010 - 2011 Johan Hovold (jhovold@gmail.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com) |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License version |
| 9 | * 2 as published by the Free Software Foundation. |
| 10 | * |
| 11 | */ |
| 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/errno.h> |
| 15 | #include <linux/slab.h> |
Randy Dunlap | 7f0ae3a | 2010-03-25 11:29:16 -0700 | [diff] [blame] | 16 | #include <linux/sysrq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/tty.h> |
| 18 | #include <linux/tty_flip.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/moduleparam.h> |
| 21 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 22 | #include <linux/usb/serial.h> |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 23 | #include <linux/uaccess.h> |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 24 | #include <linux/kfifo.h> |
Alan Stern | 1f87158 | 2010-02-17 10:05:47 -0500 | [diff] [blame] | 25 | #include <linux/serial.h> |
Johannes Hölzl | d9b1b78 | 2006-12-17 21:50:24 +0100 | [diff] [blame] | 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #ifdef CONFIG_USB_SERIAL_GENERIC |
David Brownell | b46d60f | 2007-03-23 12:51:55 -0700 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | static __u16 vendor = 0x05f9; |
| 30 | static __u16 product = 0xffff; |
| 31 | |
| 32 | module_param(vendor, ushort, 0); |
| 33 | MODULE_PARM_DESC(vendor, "User specified USB idVendor"); |
| 34 | |
| 35 | module_param(product, ushort, 0); |
| 36 | MODULE_PARM_DESC(product, "User specified USB idProduct"); |
| 37 | |
| 38 | static struct usb_device_id generic_device_ids[2]; /* Initially all zeroes. */ |
| 39 | |
| 40 | /* All of the device info needed for the Generic Serial Converter */ |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 41 | struct usb_serial_driver usb_serial_generic_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 42 | .driver = { |
| 43 | .owner = THIS_MODULE, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 44 | .name = "generic", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 45 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | .id_table = generic_device_ids, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | .num_ports = 1, |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 48 | .disconnect = usb_serial_generic_disconnect, |
| 49 | .release = usb_serial_generic_release, |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 50 | .throttle = usb_serial_generic_throttle, |
| 51 | .unthrottle = usb_serial_generic_unthrottle, |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 52 | .resume = usb_serial_generic_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | }; |
| 54 | |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 55 | static struct usb_serial_driver * const serial_drivers[] = { |
| 56 | &usb_serial_generic_device, NULL |
| 57 | }; |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #endif |
| 60 | |
Greg Kroah-Hartman | 3033bc8 | 2012-09-18 16:05:17 +0100 | [diff] [blame] | 61 | int usb_serial_generic_register(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
| 63 | int retval = 0; |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #ifdef CONFIG_USB_SERIAL_GENERIC |
| 66 | generic_device_ids[0].idVendor = vendor; |
| 67 | generic_device_ids[0].idProduct = product; |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 68 | generic_device_ids[0].match_flags = |
| 69 | USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | /* register our generic driver with ourselves */ |
Alan Stern | 0b84704 | 2012-05-31 17:03:52 -0400 | [diff] [blame] | 72 | retval = usb_serial_register_drivers(serial_drivers, |
| 73 | "usbserial_generic", generic_device_ids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #endif |
| 75 | return retval; |
| 76 | } |
| 77 | |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 78 | void usb_serial_generic_deregister(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
| 80 | #ifdef CONFIG_USB_SERIAL_GENERIC |
| 81 | /* remove our generic driver */ |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 82 | usb_serial_deregister_drivers(serial_drivers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #endif |
| 84 | } |
| 85 | |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 86 | int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | int result = 0; |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 89 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 91 | /* clear the throttle flags */ |
| 92 | spin_lock_irqsave(&port->lock, flags); |
| 93 | port->throttled = 0; |
| 94 | port->throttle_req = 0; |
| 95 | spin_unlock_irqrestore(&port->lock, flags); |
| 96 | |
| 97 | /* if we have a bulk endpoint, start reading from it */ |
Johan Hovold | 41bd72f | 2010-03-17 23:05:53 +0100 | [diff] [blame] | 98 | if (port->bulk_in_size) |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 99 | result = usb_serial_generic_submit_read_urbs(port, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | return result; |
| 102 | } |
Greg Kroah-Hartman | 815ddc9 | 2006-05-12 11:05:29 -0700 | [diff] [blame] | 103 | EXPORT_SYMBOL_GPL(usb_serial_generic_open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 105 | static void generic_cleanup(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | { |
Johan Hovold | ec3ee50 | 2010-03-17 23:00:44 +0100 | [diff] [blame] | 107 | unsigned long flags; |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 108 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Johan Hovold | 19c6185 | 2013-03-21 12:36:38 +0100 | [diff] [blame^] | 110 | if (port->bulk_out_size) { |
| 111 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
| 112 | usb_kill_urb(port->write_urbs[i]); |
Johan Hovold | ec3ee50 | 2010-03-17 23:00:44 +0100 | [diff] [blame] | 113 | |
Johan Hovold | 19c6185 | 2013-03-21 12:36:38 +0100 | [diff] [blame^] | 114 | spin_lock_irqsave(&port->lock, flags); |
| 115 | kfifo_reset_out(&port->write_fifo); |
| 116 | spin_unlock_irqrestore(&port->lock, flags); |
| 117 | } |
| 118 | if (port->bulk_in_size) { |
| 119 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
| 120 | usb_kill_urb(port->read_urbs[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | } |
| 123 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 124 | void usb_serial_generic_close(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | { |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 126 | generic_cleanup(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
Johan Hovold | f26788d | 2010-03-17 23:00:45 +0100 | [diff] [blame] | 128 | EXPORT_SYMBOL_GPL(usb_serial_generic_close); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Johan Hovold | eaa3bcb | 2010-03-17 23:06:08 +0100 | [diff] [blame] | 130 | int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port, |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 131 | void *dest, size_t size) |
Johan Hovold | eaa3bcb | 2010-03-17 23:06:08 +0100 | [diff] [blame] | 132 | { |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 133 | return kfifo_out_locked(&port->write_fifo, dest, size, &port->lock); |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 134 | } |
| 135 | |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 136 | /** |
| 137 | * usb_serial_generic_write_start - kick off an URB write |
| 138 | * @port: Pointer to the &struct usb_serial_port data |
| 139 | * |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 140 | * Returns zero on success, or a negative errno value |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 141 | */ |
| 142 | static int usb_serial_generic_write_start(struct usb_serial_port *port) |
| 143 | { |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 144 | struct urb *urb; |
| 145 | int count, result; |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 146 | unsigned long flags; |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 147 | int i; |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 148 | |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 149 | if (test_and_set_bit_lock(USB_SERIAL_WRITE_BUSY, &port->flags)) |
| 150 | return 0; |
| 151 | retry: |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 152 | spin_lock_irqsave(&port->lock, flags); |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 153 | if (!port->write_urbs_free || !kfifo_len(&port->write_fifo)) { |
| 154 | clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags); |
Johan Hovold | 50a5f70 | 2010-03-17 23:06:02 +0100 | [diff] [blame] | 155 | spin_unlock_irqrestore(&port->lock, flags); |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 156 | return 0; |
Johan Hovold | 50a5f70 | 2010-03-17 23:06:02 +0100 | [diff] [blame] | 157 | } |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 158 | i = (int)find_first_bit(&port->write_urbs_free, |
| 159 | ARRAY_SIZE(port->write_urbs)); |
Johan Hovold | 50a5f70 | 2010-03-17 23:06:02 +0100 | [diff] [blame] | 160 | spin_unlock_irqrestore(&port->lock, flags); |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 161 | |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 162 | urb = port->write_urbs[i]; |
Johan Hovold | eaa3bcb | 2010-03-17 23:06:08 +0100 | [diff] [blame] | 163 | count = port->serial->type->prepare_write_buffer(port, |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 164 | urb->transfer_buffer, |
| 165 | port->bulk_out_size); |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 166 | urb->transfer_buffer_length = count; |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 167 | usb_serial_debug_data(&port->dev, __func__, count, urb->transfer_buffer); |
Johan Hovold | b58af40 | 2010-08-04 15:45:57 +0200 | [diff] [blame] | 168 | spin_lock_irqsave(&port->lock, flags); |
| 169 | port->tx_bytes += count; |
| 170 | spin_unlock_irqrestore(&port->lock, flags); |
| 171 | |
| 172 | clear_bit(i, &port->write_urbs_free); |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 173 | result = usb_submit_urb(urb, GFP_ATOMIC); |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 174 | if (result) { |
Johan Hovold | f1475a0 | 2012-02-10 13:20:50 +0100 | [diff] [blame] | 175 | dev_err_console(port, "%s - error submitting urb: %d\n", |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 176 | __func__, result); |
Johan Hovold | b58af40 | 2010-08-04 15:45:57 +0200 | [diff] [blame] | 177 | set_bit(i, &port->write_urbs_free); |
| 178 | spin_lock_irqsave(&port->lock, flags); |
| 179 | port->tx_bytes -= count; |
| 180 | spin_unlock_irqrestore(&port->lock, flags); |
| 181 | |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 182 | clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags); |
Johan Hovold | 30af7fb | 2010-03-17 23:00:42 +0100 | [diff] [blame] | 183 | return result; |
| 184 | } |
Johan Hovold | 30af7fb | 2010-03-17 23:00:42 +0100 | [diff] [blame] | 185 | |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 186 | /* Try sending off another urb, unless in irq context (in which case |
| 187 | * there will be no free urb). */ |
| 188 | if (!in_irq()) |
| 189 | goto retry; |
| 190 | |
| 191 | clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags); |
| 192 | |
| 193 | return 0; |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | /** |
| 197 | * usb_serial_generic_write - generic write function for serial USB devices |
| 198 | * @tty: Pointer to &struct tty_struct for the device |
| 199 | * @port: Pointer to the &usb_serial_port structure for the device |
| 200 | * @buf: Pointer to the data to write |
| 201 | * @count: Number of bytes to write |
| 202 | * |
| 203 | * Returns the number of characters actually written, which may be anything |
| 204 | * from zero to @count. If an error occurs, it returns the negative errno |
| 205 | * value. |
| 206 | */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 207 | int usb_serial_generic_write(struct tty_struct *tty, |
| 208 | struct usb_serial_port *port, const unsigned char *buf, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Johan Hovold | eb8878a | 2010-02-27 16:24:49 +0100 | [diff] [blame] | 212 | /* only do something if we have a bulk out endpoint */ |
| 213 | if (!port->bulk_out_size) |
| 214 | return -ENODEV; |
| 215 | |
Johan Hovold | 1a1405e | 2010-03-17 23:06:01 +0100 | [diff] [blame] | 216 | if (!count) |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 217 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
Stefani Seibold | 119eecc | 2009-12-23 09:10:48 +0100 | [diff] [blame] | 219 | count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 220 | result = usb_serial_generic_write_start(port); |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 221 | if (result) |
| 222 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 224 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
Jason Wessel | 98fcb5f | 2009-05-11 15:24:09 -0500 | [diff] [blame] | 226 | EXPORT_SYMBOL_GPL(usb_serial_generic_write); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 228 | int usb_serial_generic_write_room(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 230 | struct usb_serial_port *port = tty->driver_data; |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 231 | unsigned long flags; |
Johan Hovold | 25d514c | 2010-03-17 23:06:07 +0100 | [diff] [blame] | 232 | int room; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
Johan Hovold | eb8878a | 2010-02-27 16:24:49 +0100 | [diff] [blame] | 234 | if (!port->bulk_out_size) |
| 235 | return 0; |
| 236 | |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 237 | spin_lock_irqsave(&port->lock, flags); |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 238 | room = kfifo_avail(&port->write_fifo); |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 239 | spin_unlock_irqrestore(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
Greg Kroah-Hartman | 689c278 | 2012-05-15 16:27:18 -0700 | [diff] [blame] | 241 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
Alan Cox | a5b6f60 | 2008-04-08 17:16:06 +0100 | [diff] [blame] | 242 | return room; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
| 244 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 245 | int usb_serial_generic_chars_in_buffer(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 247 | struct usb_serial_port *port = tty->driver_data; |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 248 | unsigned long flags; |
Johan Hovold | eb8878a | 2010-02-27 16:24:49 +0100 | [diff] [blame] | 249 | int chars; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
Johan Hovold | eb8878a | 2010-02-27 16:24:49 +0100 | [diff] [blame] | 251 | if (!port->bulk_out_size) |
| 252 | return 0; |
| 253 | |
Stefani Seibold | 25719e6b | 2010-01-05 14:30:31 +0100 | [diff] [blame] | 254 | spin_lock_irqsave(&port->lock, flags); |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 255 | chars = kfifo_len(&port->write_fifo) + port->tx_bytes; |
Stefani Seibold | 25719e6b | 2010-01-05 14:30:31 +0100 | [diff] [blame] | 256 | spin_unlock_irqrestore(&port->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Greg Kroah-Hartman | 689c278 | 2012-05-15 16:27:18 -0700 | [diff] [blame] | 258 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 259 | return chars; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } |
Johan Hovold | 428d998 | 2012-10-29 10:56:25 +0100 | [diff] [blame] | 261 | EXPORT_SYMBOL_GPL(usb_serial_generic_chars_in_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 263 | static int usb_serial_generic_submit_read_urb(struct usb_serial_port *port, |
| 264 | int index, gfp_t mem_flags) |
| 265 | { |
| 266 | int res; |
| 267 | |
| 268 | if (!test_and_clear_bit(index, &port->read_urbs_free)) |
| 269 | return 0; |
| 270 | |
Johan Hovold | 49bd196 | 2013-03-21 12:36:27 +0100 | [diff] [blame] | 271 | dev_dbg(&port->dev, "%s - urb %d\n", __func__, index); |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 272 | |
| 273 | res = usb_submit_urb(port->read_urbs[index], mem_flags); |
| 274 | if (res) { |
| 275 | if (res != -EPERM) { |
| 276 | dev_err(&port->dev, |
| 277 | "%s - usb_submit_urb failed: %d\n", |
| 278 | __func__, res); |
| 279 | } |
| 280 | set_bit(index, &port->read_urbs_free); |
| 281 | return res; |
| 282 | } |
| 283 | |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port, |
Johan Hovold | 41bd72f | 2010-03-17 23:05:53 +0100 | [diff] [blame] | 288 | gfp_t mem_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | { |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 290 | int res; |
| 291 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 293 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
| 294 | res = usb_serial_generic_submit_read_urb(port, i, mem_flags); |
| 295 | if (res) |
| 296 | goto err; |
Johan Hovold | 0ae1474 | 2010-02-27 14:05:46 +0100 | [diff] [blame] | 297 | } |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 298 | |
| 299 | return 0; |
| 300 | err: |
| 301 | for (; i >= 0; --i) |
| 302 | usb_kill_urb(port->read_urbs[i]); |
| 303 | |
| 304 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | } |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 306 | EXPORT_SYMBOL_GPL(usb_serial_generic_submit_read_urbs); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 307 | |
Johan Hovold | 2315432 | 2010-03-17 23:05:57 +0100 | [diff] [blame] | 308 | void usb_serial_generic_process_read_urb(struct urb *urb) |
Oliver Neukum | 1abdeeb | 2007-05-07 12:09:33 +0200 | [diff] [blame] | 309 | { |
Johan Hovold | 0f3d5ba | 2010-03-17 23:05:56 +0100 | [diff] [blame] | 310 | struct usb_serial_port *port = urb->context; |
Jason Wessel | 98fcb5f | 2009-05-11 15:24:09 -0500 | [diff] [blame] | 311 | char *ch = (char *)urb->transfer_buffer; |
| 312 | int i; |
| 313 | |
Johan Hovold | 56a1df4 | 2010-05-15 17:53:44 +0200 | [diff] [blame] | 314 | if (!urb->actual_length) |
| 315 | return; |
| 316 | |
Alan Cox | 4cd1de0a | 2009-07-09 13:35:52 +0100 | [diff] [blame] | 317 | /* The per character mucking around with sysrq path it too slow for |
| 318 | stuff like 3G modems, so shortcircuit it in the 99.9999999% of cases |
| 319 | where the USB serial is not a console anyway */ |
Jason Wessel | bd5afa9 | 2010-03-08 21:50:12 -0600 | [diff] [blame] | 320 | if (!port->port.console || !port->sysrq) |
Jiri Slaby | 05c7cd3 | 2013-01-03 15:53:04 +0100 | [diff] [blame] | 321 | tty_insert_flip_string(&port->port, ch, urb->actual_length); |
Alan Cox | 4cd1de0a | 2009-07-09 13:35:52 +0100 | [diff] [blame] | 322 | else { |
Alan Cox | 4cd1de0a | 2009-07-09 13:35:52 +0100 | [diff] [blame] | 323 | for (i = 0; i < urb->actual_length; i++, ch++) { |
Dmitry Torokhov | 6ee9f4b | 2010-08-17 21:15:47 -0700 | [diff] [blame] | 324 | if (!usb_serial_handle_sysrq_char(port, *ch)) |
Jiri Slaby | 92a19f9 | 2013-01-03 15:53:03 +0100 | [diff] [blame] | 325 | tty_insert_flip_char(&port->port, *ch, TTY_NORMAL); |
Alan Cox | 4cd1de0a | 2009-07-09 13:35:52 +0100 | [diff] [blame] | 326 | } |
Oliver Neukum | 1abdeeb | 2007-05-07 12:09:33 +0200 | [diff] [blame] | 327 | } |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 328 | tty_flip_buffer_push(&port->port); |
Oliver Neukum | 1abdeeb | 2007-05-07 12:09:33 +0200 | [diff] [blame] | 329 | } |
Johan Hovold | 2315432 | 2010-03-17 23:05:57 +0100 | [diff] [blame] | 330 | EXPORT_SYMBOL_GPL(usb_serial_generic_process_read_urb); |
Oliver Neukum | 1abdeeb | 2007-05-07 12:09:33 +0200 | [diff] [blame] | 331 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 332 | void usb_serial_generic_read_bulk_callback(struct urb *urb) |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 333 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 334 | struct usb_serial_port *port = urb->context; |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 335 | unsigned char *data = urb->transfer_buffer; |
Borislav Petkov | bfaeafc | 2007-10-28 13:24:16 +0100 | [diff] [blame] | 336 | unsigned long flags; |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 337 | int i; |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 338 | |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 339 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
| 340 | if (urb == port->read_urbs[i]) |
| 341 | break; |
| 342 | } |
| 343 | set_bit(i, &port->read_urbs_free); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 344 | |
Johan Hovold | 49bd196 | 2013-03-21 12:36:27 +0100 | [diff] [blame] | 345 | dev_dbg(&port->dev, "%s - urb %d, len %d\n", __func__, i, |
| 346 | urb->actual_length); |
Greg Kroah-Hartman | 689c278 | 2012-05-15 16:27:18 -0700 | [diff] [blame] | 347 | |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 348 | if (urb->status) { |
Greg Kroah-Hartman | 689c278 | 2012-05-15 16:27:18 -0700 | [diff] [blame] | 349 | dev_dbg(&port->dev, "%s - non-zero urb status: %d\n", |
| 350 | __func__, urb->status); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 351 | return; |
| 352 | } |
| 353 | |
Greg Kroah-Hartman | 59d33f2 | 2012-09-18 09:58:57 +0100 | [diff] [blame] | 354 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
Johan Hovold | 2315432 | 2010-03-17 23:05:57 +0100 | [diff] [blame] | 355 | port->serial->type->process_read_urb(urb); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 356 | |
| 357 | /* Throttle the device if requested by tty */ |
Borislav Petkov | bfaeafc | 2007-10-28 13:24:16 +0100 | [diff] [blame] | 358 | spin_lock_irqsave(&port->lock, flags); |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 359 | port->throttled = port->throttle_req; |
| 360 | if (!port->throttled) { |
Pete Zaitcev | b507cc9 | 2008-03-04 23:28:42 -0800 | [diff] [blame] | 361 | spin_unlock_irqrestore(&port->lock, flags); |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 362 | usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC); |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 363 | } else |
Pete Zaitcev | b507cc9 | 2008-03-04 23:28:42 -0800 | [diff] [blame] | 364 | spin_unlock_irqrestore(&port->lock, flags); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 365 | } |
Luiz Fernando N. Capitulino | 166ffcc | 2006-07-11 14:19:25 -0300 | [diff] [blame] | 366 | EXPORT_SYMBOL_GPL(usb_serial_generic_read_bulk_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 368 | void usb_serial_generic_write_bulk_callback(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | { |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 370 | unsigned long flags; |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 371 | struct usb_serial_port *port = urb->context; |
Greg Kroah-Hartman | fbd27225 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 372 | int status = urb->status; |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 373 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 375 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
| 376 | if (port->write_urbs[i] == urb) |
| 377 | break; |
| 378 | |
| 379 | spin_lock_irqsave(&port->lock, flags); |
| 380 | port->tx_bytes -= urb->transfer_buffer_length; |
| 381 | set_bit(i, &port->write_urbs_free); |
| 382 | spin_unlock_irqrestore(&port->lock, flags); |
| 383 | |
| 384 | if (status) { |
Greg Kroah-Hartman | 689c278 | 2012-05-15 16:27:18 -0700 | [diff] [blame] | 385 | dev_dbg(&port->dev, "%s - non-zero urb status: %d\n", |
| 386 | __func__, status); |
Johan Hovold | 2591530 | 2010-01-06 15:48:42 -0800 | [diff] [blame] | 387 | |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 388 | spin_lock_irqsave(&port->lock, flags); |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 389 | kfifo_reset_out(&port->write_fifo); |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 390 | spin_unlock_irqrestore(&port->lock, flags); |
| 391 | } else { |
Johan Hovold | c23e5fc | 2010-05-05 23:58:13 +0200 | [diff] [blame] | 392 | usb_serial_generic_write_start(port); |
Jason Wessel | 715b1dc | 2009-05-11 15:24:07 -0500 | [diff] [blame] | 393 | } |
| 394 | |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 395 | usb_serial_port_softint(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | } |
Greg Kroah-Hartman | bb83398 | 2005-11-17 09:48:18 -0800 | [diff] [blame] | 397 | EXPORT_SYMBOL_GPL(usb_serial_generic_write_bulk_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 399 | void usb_serial_generic_throttle(struct tty_struct *tty) |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 400 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 401 | struct usb_serial_port *port = tty->driver_data; |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 402 | unsigned long flags; |
| 403 | |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 404 | /* Set the throttle request flag. It will be picked up |
| 405 | * by usb_serial_generic_read_bulk_callback(). */ |
| 406 | spin_lock_irqsave(&port->lock, flags); |
| 407 | port->throttle_req = 1; |
| 408 | spin_unlock_irqrestore(&port->lock, flags); |
| 409 | } |
Johan Hovold | f1e949a | 2010-03-17 23:05:59 +0100 | [diff] [blame] | 410 | EXPORT_SYMBOL_GPL(usb_serial_generic_throttle); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 411 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 412 | void usb_serial_generic_unthrottle(struct tty_struct *tty) |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 413 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 414 | struct usb_serial_port *port = tty->driver_data; |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 415 | int was_throttled; |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 416 | |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 417 | /* Clear the throttle flags */ |
Johan Hovold | 0f3d5ba | 2010-03-17 23:05:56 +0100 | [diff] [blame] | 418 | spin_lock_irq(&port->lock); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 419 | was_throttled = port->throttled; |
| 420 | port->throttled = port->throttle_req = 0; |
Johan Hovold | 0f3d5ba | 2010-03-17 23:05:56 +0100 | [diff] [blame] | 421 | spin_unlock_irq(&port->lock); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 422 | |
Johan Hovold | 0f3d5ba | 2010-03-17 23:05:56 +0100 | [diff] [blame] | 423 | if (was_throttled) |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 424 | usb_serial_generic_submit_read_urbs(port, GFP_KERNEL); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 425 | } |
Johan Hovold | f1e949a | 2010-03-17 23:05:59 +0100 | [diff] [blame] | 426 | EXPORT_SYMBOL_GPL(usb_serial_generic_unthrottle); |
Joris van Rantwijk | 253ca92 | 2007-02-01 20:08:18 +0100 | [diff] [blame] | 427 | |
Randy Dunlap | 7f0ae3a | 2010-03-25 11:29:16 -0700 | [diff] [blame] | 428 | #ifdef CONFIG_MAGIC_SYSRQ |
Dmitry Torokhov | 6ee9f4b | 2010-08-17 21:15:47 -0700 | [diff] [blame] | 429 | int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch) |
Jason Wessel | 98fcb5f | 2009-05-11 15:24:09 -0500 | [diff] [blame] | 430 | { |
Jason Wessel | bd5afa9 | 2010-03-08 21:50:12 -0600 | [diff] [blame] | 431 | if (port->sysrq && port->port.console) { |
Jason Wessel | 98fcb5f | 2009-05-11 15:24:09 -0500 | [diff] [blame] | 432 | if (ch && time_before(jiffies, port->sysrq)) { |
Dmitry Torokhov | f335397 | 2010-08-17 21:15:47 -0700 | [diff] [blame] | 433 | handle_sysrq(ch); |
Jason Wessel | 98fcb5f | 2009-05-11 15:24:09 -0500 | [diff] [blame] | 434 | port->sysrq = 0; |
| 435 | return 1; |
| 436 | } |
| 437 | port->sysrq = 0; |
| 438 | } |
| 439 | return 0; |
| 440 | } |
Randy Dunlap | 7f0ae3a | 2010-03-25 11:29:16 -0700 | [diff] [blame] | 441 | #else |
Dmitry Torokhov | 6ee9f4b | 2010-08-17 21:15:47 -0700 | [diff] [blame] | 442 | int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch) |
Randy Dunlap | 7f0ae3a | 2010-03-25 11:29:16 -0700 | [diff] [blame] | 443 | { |
| 444 | return 0; |
| 445 | } |
| 446 | #endif |
Jason Wessel | 98fcb5f | 2009-05-11 15:24:09 -0500 | [diff] [blame] | 447 | EXPORT_SYMBOL_GPL(usb_serial_handle_sysrq_char); |
| 448 | |
| 449 | int usb_serial_handle_break(struct usb_serial_port *port) |
| 450 | { |
| 451 | if (!port->sysrq) { |
| 452 | port->sysrq = jiffies + HZ*5; |
| 453 | return 1; |
| 454 | } |
| 455 | port->sysrq = 0; |
| 456 | return 0; |
| 457 | } |
| 458 | EXPORT_SYMBOL_GPL(usb_serial_handle_break); |
| 459 | |
Libor Pechacek | d14fc1a | 2011-01-14 14:30:21 +0100 | [diff] [blame] | 460 | /** |
| 461 | * usb_serial_handle_dcd_change - handle a change of carrier detect state |
| 462 | * @port: usb_serial_port structure for the open port |
| 463 | * @tty: tty_struct structure for the port |
| 464 | * @status: new carrier detect status, nonzero if active |
| 465 | */ |
| 466 | void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port, |
| 467 | struct tty_struct *tty, unsigned int status) |
| 468 | { |
| 469 | struct tty_port *port = &usb_port->port; |
| 470 | |
Johan Hovold | 49bd196 | 2013-03-21 12:36:27 +0100 | [diff] [blame] | 471 | dev_dbg(&usb_port->dev, "%s - status %d\n", __func__, status); |
Libor Pechacek | d14fc1a | 2011-01-14 14:30:21 +0100 | [diff] [blame] | 472 | |
| 473 | if (status) |
| 474 | wake_up_interruptible(&port->open_wait); |
| 475 | else if (tty && !C_CLOCAL(tty)) |
| 476 | tty_hangup(tty); |
| 477 | } |
| 478 | EXPORT_SYMBOL_GPL(usb_serial_handle_dcd_change); |
| 479 | |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 480 | int usb_serial_generic_resume(struct usb_serial *serial) |
| 481 | { |
| 482 | struct usb_serial_port *port; |
| 483 | int i, c = 0, r; |
| 484 | |
| 485 | for (i = 0; i < serial->num_ports; i++) { |
| 486 | port = serial->port[i]; |
Alan Stern | 1f87158 | 2010-02-17 10:05:47 -0500 | [diff] [blame] | 487 | if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 488 | continue; |
| 489 | |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 490 | if (port->bulk_in_size) { |
| 491 | r = usb_serial_generic_submit_read_urbs(port, |
| 492 | GFP_NOIO); |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 493 | if (r < 0) |
| 494 | c++; |
| 495 | } |
| 496 | |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 497 | if (port->bulk_out_size) { |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 498 | r = usb_serial_generic_write_start(port); |
| 499 | if (r < 0) |
| 500 | c++; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | return c ? -EIO : 0; |
| 505 | } |
| 506 | EXPORT_SYMBOL_GPL(usb_serial_generic_resume); |
| 507 | |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 508 | void usb_serial_generic_disconnect(struct usb_serial *serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | { |
| 510 | int i; |
| 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | /* stop reads and writes on all ports */ |
Alan Cox | ae64387 | 2008-07-22 11:11:55 +0100 | [diff] [blame] | 513 | for (i = 0; i < serial->num_ports; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | generic_cleanup(serial->port[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } |
Bill Pemberton | 5c7efeb | 2010-08-05 17:01:10 -0400 | [diff] [blame] | 516 | EXPORT_SYMBOL_GPL(usb_serial_generic_disconnect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 518 | void usb_serial_generic_release(struct usb_serial *serial) |
| 519 | { |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 520 | } |