Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Ours Technology Inc. OTi-6858 USB to serial adapter driver. |
| 3 | * |
| 4 | * Copyleft (C) 2007 Kees Lemmens (adapted for kernel 2.6.20) |
| 5 | * Copyright (C) 2006 Tomasz Michal Lukaszewski (FIXME: add e-mail) |
| 6 | * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) |
| 7 | * Copyright (C) 2003 IBM Corp. |
| 8 | * |
| 9 | * Many thanks to the authors of pl2303 driver: all functions in this file |
| 10 | * are heavily based on pl2303 code, buffering code is a 1-to-1 copy. |
| 11 | * |
| 12 | * Warning! You use this driver on your own risk! The only official |
| 13 | * description of this device I have is datasheet from manufacturer, |
| 14 | * and it doesn't contain almost any information needed to write a driver. |
| 15 | * Almost all knowlegde used while writing this driver was gathered by: |
| 16 | * - analyzing traffic between device and the M$ Windows 2000 driver, |
| 17 | * - trying different bit combinations and checking pin states |
| 18 | * with a voltmeter, |
| 19 | * - receiving malformed frames and producing buffer overflows |
| 20 | * to learn how errors are reported, |
| 21 | * So, THIS CODE CAN DESTROY OTi-6858 AND ANY OTHER DEVICES, THAT ARE |
| 22 | * CONNECTED TO IT! |
| 23 | * |
| 24 | * This program is free software; you can redistribute it and/or modify |
| 25 | * it under the terms of the GNU General Public License as published by |
| 26 | * the Free Software Foundation; either version 2 of the License. |
| 27 | * |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 28 | * See Documentation/usb/usb-serial.txt for more information on using this |
| 29 | * driver |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 30 | * |
| 31 | * TODO: |
| 32 | * - implement correct flushing for ioctls and oti6858_close() |
| 33 | * - check how errors (rx overflow, parity error, framing error) are reported |
| 34 | * - implement oti6858_break_ctl() |
| 35 | * - implement more ioctls |
| 36 | * - test/implement flow control |
| 37 | * - allow setting custom baud rates |
| 38 | */ |
| 39 | |
| 40 | #include <linux/kernel.h> |
| 41 | #include <linux/errno.h> |
| 42 | #include <linux/init.h> |
| 43 | #include <linux/slab.h> |
| 44 | #include <linux/tty.h> |
| 45 | #include <linux/tty_driver.h> |
| 46 | #include <linux/tty_flip.h> |
| 47 | #include <linux/serial.h> |
| 48 | #include <linux/module.h> |
| 49 | #include <linux/moduleparam.h> |
| 50 | #include <linux/spinlock.h> |
| 51 | #include <linux/usb.h> |
| 52 | #include <linux/usb/serial.h> |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 53 | #include <linux/uaccess.h> |
Johan Hovold | e3c1803 | 2010-05-16 20:33:51 +0200 | [diff] [blame] | 54 | #include <linux/kfifo.h> |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 55 | #include "oti6858.h" |
| 56 | |
| 57 | #define OTI6858_DESCRIPTION \ |
| 58 | "Ours Technology Inc. OTi-6858 USB to serial adapter driver" |
| 59 | #define OTI6858_AUTHOR "Tomasz Michal Lukaszewski <FIXME@FIXME>" |
Johan Hovold | e3c1803 | 2010-05-16 20:33:51 +0200 | [diff] [blame] | 60 | #define OTI6858_VERSION "0.2" |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 61 | |
Németh Márton | 7d40d7e | 2010-01-10 15:34:24 +0100 | [diff] [blame] | 62 | static const struct usb_device_id id_table[] = { |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 63 | { USB_DEVICE(OTI6858_VENDOR_ID, OTI6858_PRODUCT_ID) }, |
| 64 | { } |
| 65 | }; |
| 66 | |
| 67 | MODULE_DEVICE_TABLE(usb, id_table); |
| 68 | |
| 69 | static struct usb_driver oti6858_driver = { |
| 70 | .name = "oti6858", |
| 71 | .probe = usb_serial_probe, |
| 72 | .disconnect = usb_serial_disconnect, |
| 73 | .id_table = id_table, |
| 74 | .no_dynamic_id = 1, |
| 75 | }; |
| 76 | |
| 77 | static int debug; |
| 78 | |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 79 | /* requests */ |
| 80 | #define OTI6858_REQ_GET_STATUS (USB_DIR_IN | USB_TYPE_VENDOR | 0x00) |
| 81 | #define OTI6858_REQ_T_GET_STATUS 0x01 |
| 82 | |
| 83 | #define OTI6858_REQ_SET_LINE (USB_DIR_OUT | USB_TYPE_VENDOR | 0x00) |
| 84 | #define OTI6858_REQ_T_SET_LINE 0x00 |
| 85 | |
| 86 | #define OTI6858_REQ_CHECK_TXBUFF (USB_DIR_IN | USB_TYPE_VENDOR | 0x01) |
| 87 | #define OTI6858_REQ_T_CHECK_TXBUFF 0x00 |
| 88 | |
| 89 | /* format of the control packet */ |
| 90 | struct oti6858_control_pkt { |
Al Viro | fd05e72 | 2008-04-28 07:00:16 +0100 | [diff] [blame] | 91 | __le16 divisor; /* baud rate = 96000000 / (16 * divisor), LE */ |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 92 | #define OTI6858_MAX_BAUD_RATE 3000000 |
| 93 | u8 frame_fmt; |
| 94 | #define FMT_STOP_BITS_MASK 0xc0 |
| 95 | #define FMT_STOP_BITS_1 0x00 |
| 96 | #define FMT_STOP_BITS_2 0x40 /* 1.5 stop bits if FMT_DATA_BITS_5 */ |
| 97 | #define FMT_PARITY_MASK 0x38 |
| 98 | #define FMT_PARITY_NONE 0x00 |
| 99 | #define FMT_PARITY_ODD 0x08 |
| 100 | #define FMT_PARITY_EVEN 0x18 |
| 101 | #define FMT_PARITY_MARK 0x28 |
| 102 | #define FMT_PARITY_SPACE 0x38 |
| 103 | #define FMT_DATA_BITS_MASK 0x03 |
| 104 | #define FMT_DATA_BITS_5 0x00 |
| 105 | #define FMT_DATA_BITS_6 0x01 |
| 106 | #define FMT_DATA_BITS_7 0x02 |
| 107 | #define FMT_DATA_BITS_8 0x03 |
| 108 | u8 something; /* always equals 0x43 */ |
| 109 | u8 control; /* settings of flow control lines */ |
| 110 | #define CONTROL_MASK 0x0c |
| 111 | #define CONTROL_DTR_HIGH 0x08 |
| 112 | #define CONTROL_RTS_HIGH 0x04 |
| 113 | u8 tx_status; |
| 114 | #define TX_BUFFER_EMPTIED 0x09 |
| 115 | u8 pin_state; |
| 116 | #define PIN_MASK 0x3f |
| 117 | #define PIN_RTS 0x20 /* output pin */ |
| 118 | #define PIN_CTS 0x10 /* input pin, active low */ |
| 119 | #define PIN_DSR 0x08 /* input pin, active low */ |
| 120 | #define PIN_DTR 0x04 /* output pin */ |
| 121 | #define PIN_RI 0x02 /* input pin, active low */ |
| 122 | #define PIN_DCD 0x01 /* input pin, active low */ |
| 123 | u8 rx_bytes_avail; /* number of bytes in rx buffer */; |
| 124 | }; |
| 125 | |
| 126 | #define OTI6858_CTRL_PKT_SIZE sizeof(struct oti6858_control_pkt) |
| 127 | #define OTI6858_CTRL_EQUALS_PENDING(a, priv) \ |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 128 | (((a)->divisor == (priv)->pending_setup.divisor) \ |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 129 | && ((a)->control == (priv)->pending_setup.control) \ |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 130 | && ((a)->frame_fmt == (priv)->pending_setup.frame_fmt)) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 131 | |
| 132 | /* function prototypes */ |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 133 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 134 | static void oti6858_close(struct usb_serial_port *port); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 135 | static void oti6858_set_termios(struct tty_struct *tty, |
| 136 | struct usb_serial_port *port, struct ktermios *old); |
Alan Cox | fe1ae7f | 2009-09-19 13:13:33 -0700 | [diff] [blame] | 137 | static void oti6858_init_termios(struct tty_struct *tty); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 138 | static int oti6858_ioctl(struct tty_struct *tty, struct file *file, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 139 | unsigned int cmd, unsigned long arg); |
| 140 | static void oti6858_read_int_callback(struct urb *urb); |
| 141 | static void oti6858_read_bulk_callback(struct urb *urb); |
| 142 | static void oti6858_write_bulk_callback(struct urb *urb); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 143 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 144 | const unsigned char *buf, int count); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 145 | static int oti6858_write_room(struct tty_struct *tty); |
| 146 | static int oti6858_chars_in_buffer(struct tty_struct *tty); |
| 147 | static int oti6858_tiocmget(struct tty_struct *tty, struct file *file); |
| 148 | static int oti6858_tiocmset(struct tty_struct *tty, struct file *file, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 149 | unsigned int set, unsigned int clear); |
| 150 | static int oti6858_startup(struct usb_serial *serial); |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 151 | static void oti6858_release(struct usb_serial *serial); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 152 | |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 153 | /* device info */ |
| 154 | static struct usb_serial_driver oti6858_device = { |
| 155 | .driver = { |
| 156 | .owner = THIS_MODULE, |
| 157 | .name = "oti6858", |
| 158 | }, |
| 159 | .id_table = id_table, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 160 | .num_ports = 1, |
| 161 | .open = oti6858_open, |
| 162 | .close = oti6858_close, |
| 163 | .write = oti6858_write, |
| 164 | .ioctl = oti6858_ioctl, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 165 | .set_termios = oti6858_set_termios, |
Alan Cox | fe1ae7f | 2009-09-19 13:13:33 -0700 | [diff] [blame] | 166 | .init_termios = oti6858_init_termios, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 167 | .tiocmget = oti6858_tiocmget, |
| 168 | .tiocmset = oti6858_tiocmset, |
| 169 | .read_bulk_callback = oti6858_read_bulk_callback, |
| 170 | .read_int_callback = oti6858_read_int_callback, |
| 171 | .write_bulk_callback = oti6858_write_bulk_callback, |
| 172 | .write_room = oti6858_write_room, |
| 173 | .chars_in_buffer = oti6858_chars_in_buffer, |
| 174 | .attach = oti6858_startup, |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 175 | .release = oti6858_release, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 176 | }; |
| 177 | |
| 178 | struct oti6858_private { |
| 179 | spinlock_t lock; |
| 180 | |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 181 | struct oti6858_control_pkt status; |
| 182 | |
| 183 | struct { |
| 184 | u8 read_urb_in_use; |
| 185 | u8 write_urb_in_use; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 186 | } flags; |
| 187 | struct delayed_work delayed_write_work; |
| 188 | |
| 189 | struct { |
Al Viro | fd05e72 | 2008-04-28 07:00:16 +0100 | [diff] [blame] | 190 | __le16 divisor; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 191 | u8 frame_fmt; |
| 192 | u8 control; |
| 193 | } pending_setup; |
| 194 | u8 transient; |
| 195 | u8 setup_done; |
| 196 | struct delayed_work delayed_setup_work; |
| 197 | |
| 198 | wait_queue_head_t intr_wait; |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 199 | struct usb_serial_port *port; /* USB port with which associated */ |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 200 | }; |
| 201 | |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 202 | static void setup_line(struct work_struct *work) |
| 203 | { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 204 | struct oti6858_private *priv = container_of(work, |
| 205 | struct oti6858_private, delayed_setup_work.work); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 206 | struct usb_serial_port *port = priv->port; |
| 207 | struct oti6858_control_pkt *new_setup; |
| 208 | unsigned long flags; |
| 209 | int result; |
| 210 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 211 | dbg("%s(port = %d)", __func__, port->number); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 212 | |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 213 | new_setup = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
| 214 | if (new_setup == NULL) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 215 | dev_err(&port->dev, "%s(): out of memory!\n", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 216 | /* we will try again */ |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 217 | schedule_delayed_work(&priv->delayed_setup_work, |
| 218 | msecs_to_jiffies(2)); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 219 | return; |
| 220 | } |
| 221 | |
| 222 | result = usb_control_msg(port->serial->dev, |
| 223 | usb_rcvctrlpipe(port->serial->dev, 0), |
| 224 | OTI6858_REQ_T_GET_STATUS, |
| 225 | OTI6858_REQ_GET_STATUS, |
| 226 | 0, 0, |
| 227 | new_setup, OTI6858_CTRL_PKT_SIZE, |
| 228 | 100); |
| 229 | |
| 230 | if (result != OTI6858_CTRL_PKT_SIZE) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 231 | dev_err(&port->dev, "%s(): error reading status\n", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 232 | kfree(new_setup); |
| 233 | /* we will try again */ |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 234 | schedule_delayed_work(&priv->delayed_setup_work, |
| 235 | msecs_to_jiffies(2)); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 236 | return; |
| 237 | } |
| 238 | |
| 239 | spin_lock_irqsave(&priv->lock, flags); |
| 240 | if (!OTI6858_CTRL_EQUALS_PENDING(new_setup, priv)) { |
| 241 | new_setup->divisor = priv->pending_setup.divisor; |
| 242 | new_setup->control = priv->pending_setup.control; |
| 243 | new_setup->frame_fmt = priv->pending_setup.frame_fmt; |
| 244 | |
| 245 | spin_unlock_irqrestore(&priv->lock, flags); |
| 246 | result = usb_control_msg(port->serial->dev, |
| 247 | usb_sndctrlpipe(port->serial->dev, 0), |
| 248 | OTI6858_REQ_T_SET_LINE, |
| 249 | OTI6858_REQ_SET_LINE, |
| 250 | 0, 0, |
| 251 | new_setup, OTI6858_CTRL_PKT_SIZE, |
| 252 | 100); |
| 253 | } else { |
| 254 | spin_unlock_irqrestore(&priv->lock, flags); |
| 255 | result = 0; |
| 256 | } |
| 257 | kfree(new_setup); |
| 258 | |
| 259 | spin_lock_irqsave(&priv->lock, flags); |
| 260 | if (result != OTI6858_CTRL_PKT_SIZE) |
| 261 | priv->transient = 0; |
| 262 | priv->setup_done = 1; |
| 263 | spin_unlock_irqrestore(&priv->lock, flags); |
| 264 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 265 | dbg("%s(): submitting interrupt urb", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 266 | port->interrupt_in_urb->dev = port->serial->dev; |
Oliver Neukum | 40d2858 | 2009-10-07 18:07:10 +0200 | [diff] [blame] | 267 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 268 | if (result != 0) { |
| 269 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 270 | " with error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 271 | } |
| 272 | } |
| 273 | |
Bill Pemberton | 7d7917b | 2010-04-28 16:59:35 -0400 | [diff] [blame] | 274 | static void send_data(struct work_struct *work) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 275 | { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 276 | struct oti6858_private *priv = container_of(work, |
| 277 | struct oti6858_private, delayed_write_work.work); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 278 | struct usb_serial_port *port = priv->port; |
| 279 | int count = 0, result; |
| 280 | unsigned long flags; |
Johan Hovold | d212632 | 2009-12-28 23:01:56 +0100 | [diff] [blame] | 281 | u8 *allow; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 282 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 283 | dbg("%s(port = %d)", __func__, port->number); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 284 | |
| 285 | spin_lock_irqsave(&priv->lock, flags); |
| 286 | if (priv->flags.write_urb_in_use) { |
| 287 | spin_unlock_irqrestore(&priv->lock, flags); |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 288 | schedule_delayed_work(&priv->delayed_write_work, |
| 289 | msecs_to_jiffies(2)); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 290 | return; |
| 291 | } |
| 292 | priv->flags.write_urb_in_use = 1; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 293 | spin_unlock_irqrestore(&priv->lock, flags); |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 294 | |
| 295 | spin_lock_irqsave(&port->lock, flags); |
| 296 | count = kfifo_len(&port->write_fifo); |
| 297 | spin_unlock_irqrestore(&port->lock, flags); |
| 298 | |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 299 | if (count > port->bulk_out_size) |
| 300 | count = port->bulk_out_size; |
| 301 | |
| 302 | if (count != 0) { |
Johan Hovold | d212632 | 2009-12-28 23:01:56 +0100 | [diff] [blame] | 303 | allow = kmalloc(1, GFP_KERNEL); |
| 304 | if (!allow) { |
| 305 | dev_err(&port->dev, "%s(): kmalloc failed\n", |
| 306 | __func__); |
| 307 | return; |
| 308 | } |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 309 | result = usb_control_msg(port->serial->dev, |
| 310 | usb_rcvctrlpipe(port->serial->dev, 0), |
| 311 | OTI6858_REQ_T_CHECK_TXBUFF, |
| 312 | OTI6858_REQ_CHECK_TXBUFF, |
Johan Hovold | d212632 | 2009-12-28 23:01:56 +0100 | [diff] [blame] | 313 | count, 0, allow, 1, 100); |
| 314 | if (result != 1 || *allow != 0) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 315 | count = 0; |
Johan Hovold | d212632 | 2009-12-28 23:01:56 +0100 | [diff] [blame] | 316 | kfree(allow); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | if (count == 0) { |
| 320 | priv->flags.write_urb_in_use = 0; |
| 321 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 322 | dbg("%s(): submitting interrupt urb", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 323 | port->interrupt_in_urb->dev = port->serial->dev; |
Oliver Neukum | 40d2858 | 2009-10-07 18:07:10 +0200 | [diff] [blame] | 324 | result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 325 | if (result != 0) { |
| 326 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 327 | " with error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 328 | } |
| 329 | return; |
| 330 | } |
| 331 | |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 332 | count = kfifo_out_locked(&port->write_fifo, |
Johan Hovold | e3c1803 | 2010-05-16 20:33:51 +0200 | [diff] [blame] | 333 | port->write_urb->transfer_buffer, |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 334 | count, &port->lock); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 335 | port->write_urb->transfer_buffer_length = count; |
| 336 | port->write_urb->dev = port->serial->dev; |
Oliver Neukum | 40d2858 | 2009-10-07 18:07:10 +0200 | [diff] [blame] | 337 | result = usb_submit_urb(port->write_urb, GFP_NOIO); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 338 | if (result != 0) { |
| 339 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 340 | " with error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 341 | priv->flags.write_urb_in_use = 0; |
| 342 | } |
| 343 | |
| 344 | usb_serial_port_softint(port); |
| 345 | } |
| 346 | |
| 347 | static int oti6858_startup(struct usb_serial *serial) |
| 348 | { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 349 | struct usb_serial_port *port = serial->port[0]; |
| 350 | struct oti6858_private *priv; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 351 | int i; |
| 352 | |
| 353 | for (i = 0; i < serial->num_ports; ++i) { |
| 354 | priv = kzalloc(sizeof(struct oti6858_private), GFP_KERNEL); |
| 355 | if (!priv) |
| 356 | break; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 357 | |
| 358 | spin_lock_init(&priv->lock); |
| 359 | init_waitqueue_head(&priv->intr_wait); |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 360 | /* INIT_WORK(&priv->setup_work, setup_line, serial->port[i]); */ |
| 361 | /* INIT_WORK(&priv->write_work, send_data, serial->port[i]); */ |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 362 | priv->port = port; |
| 363 | INIT_DELAYED_WORK(&priv->delayed_setup_work, setup_line); |
| 364 | INIT_DELAYED_WORK(&priv->delayed_write_work, send_data); |
| 365 | |
| 366 | usb_set_serial_port_data(serial->port[i], priv); |
| 367 | } |
| 368 | if (i == serial->num_ports) |
| 369 | return 0; |
| 370 | |
| 371 | for (--i; i >= 0; --i) { |
| 372 | priv = usb_get_serial_port_data(serial->port[i]); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 373 | kfree(priv); |
| 374 | usb_set_serial_port_data(serial->port[i], NULL); |
| 375 | } |
| 376 | return -ENOMEM; |
| 377 | } |
| 378 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 379 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 380 | const unsigned char *buf, int count) |
| 381 | { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 382 | dbg("%s(port = %d, count = %d)", __func__, port->number, count); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 383 | |
| 384 | if (!count) |
| 385 | return count; |
| 386 | |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 387 | count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 388 | |
| 389 | return count; |
| 390 | } |
| 391 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 392 | static int oti6858_write_room(struct tty_struct *tty) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 393 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 394 | struct usb_serial_port *port = tty->driver_data; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 395 | int room = 0; |
| 396 | unsigned long flags; |
| 397 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 398 | dbg("%s(port = %d)", __func__, port->number); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 399 | |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 400 | spin_lock_irqsave(&port->lock, flags); |
| 401 | room = kfifo_avail(&port->write_fifo); |
| 402 | spin_unlock_irqrestore(&port->lock, flags); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 403 | |
| 404 | return room; |
| 405 | } |
| 406 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 407 | static int oti6858_chars_in_buffer(struct tty_struct *tty) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 408 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 409 | struct usb_serial_port *port = tty->driver_data; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 410 | int chars = 0; |
| 411 | unsigned long flags; |
| 412 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 413 | dbg("%s(port = %d)", __func__, port->number); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 414 | |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 415 | spin_lock_irqsave(&port->lock, flags); |
| 416 | chars = kfifo_len(&port->write_fifo); |
| 417 | spin_unlock_irqrestore(&port->lock, flags); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 418 | |
| 419 | return chars; |
| 420 | } |
| 421 | |
Alan Cox | fe1ae7f | 2009-09-19 13:13:33 -0700 | [diff] [blame] | 422 | static void oti6858_init_termios(struct tty_struct *tty) |
| 423 | { |
| 424 | *(tty->termios) = tty_std_termios; |
| 425 | tty->termios->c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; |
| 426 | tty->termios->c_ispeed = 38400; |
| 427 | tty->termios->c_ospeed = 38400; |
| 428 | } |
| 429 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 430 | static void oti6858_set_termios(struct tty_struct *tty, |
| 431 | struct usb_serial_port *port, struct ktermios *old_termios) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 432 | { |
| 433 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
| 434 | unsigned long flags; |
| 435 | unsigned int cflag; |
| 436 | u8 frame_fmt, control; |
Al Viro | fd05e72 | 2008-04-28 07:00:16 +0100 | [diff] [blame] | 437 | __le16 divisor; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 438 | int br; |
| 439 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 440 | dbg("%s(port = %d)", __func__, port->number); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 441 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 442 | if (!tty) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 443 | dbg("%s(): no tty structures", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 444 | return; |
| 445 | } |
| 446 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 447 | cflag = tty->termios->c_cflag; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 448 | |
| 449 | spin_lock_irqsave(&priv->lock, flags); |
| 450 | divisor = priv->pending_setup.divisor; |
| 451 | frame_fmt = priv->pending_setup.frame_fmt; |
| 452 | control = priv->pending_setup.control; |
| 453 | spin_unlock_irqrestore(&priv->lock, flags); |
| 454 | |
| 455 | frame_fmt &= ~FMT_DATA_BITS_MASK; |
| 456 | switch (cflag & CSIZE) { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 457 | case CS5: |
| 458 | frame_fmt |= FMT_DATA_BITS_5; |
| 459 | break; |
| 460 | case CS6: |
| 461 | frame_fmt |= FMT_DATA_BITS_6; |
| 462 | break; |
| 463 | case CS7: |
| 464 | frame_fmt |= FMT_DATA_BITS_7; |
| 465 | break; |
| 466 | default: |
| 467 | case CS8: |
| 468 | frame_fmt |= FMT_DATA_BITS_8; |
| 469 | break; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | /* manufacturer claims that this device can work with baud rates |
| 473 | * up to 3 Mbps; I've tested it only on 115200 bps, so I can't |
| 474 | * guarantee that any other baud rate will work (especially |
| 475 | * the higher ones) |
| 476 | */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 477 | br = tty_get_baud_rate(tty); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 478 | if (br == 0) { |
| 479 | divisor = 0; |
Alan Cox | b0a239d | 2008-01-19 16:02:37 +0000 | [diff] [blame] | 480 | } else { |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 481 | int real_br; |
Al Viro | fd05e72 | 2008-04-28 07:00:16 +0100 | [diff] [blame] | 482 | int new_divisor; |
Alan Cox | b0a239d | 2008-01-19 16:02:37 +0000 | [diff] [blame] | 483 | br = min(br, OTI6858_MAX_BAUD_RATE); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 484 | |
Al Viro | fd05e72 | 2008-04-28 07:00:16 +0100 | [diff] [blame] | 485 | new_divisor = (96000000 + 8 * br) / (16 * br); |
| 486 | real_br = 96000000 / (16 * new_divisor); |
| 487 | divisor = cpu_to_le16(new_divisor); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 488 | tty_encode_baud_rate(tty, real_br, real_br); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | frame_fmt &= ~FMT_STOP_BITS_MASK; |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 492 | if ((cflag & CSTOPB) != 0) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 493 | frame_fmt |= FMT_STOP_BITS_2; |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 494 | else |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 495 | frame_fmt |= FMT_STOP_BITS_1; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 496 | |
| 497 | frame_fmt &= ~FMT_PARITY_MASK; |
| 498 | if ((cflag & PARENB) != 0) { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 499 | if ((cflag & PARODD) != 0) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 500 | frame_fmt |= FMT_PARITY_ODD; |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 501 | else |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 502 | frame_fmt |= FMT_PARITY_EVEN; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 503 | } else { |
| 504 | frame_fmt |= FMT_PARITY_NONE; |
| 505 | } |
| 506 | |
| 507 | control &= ~CONTROL_MASK; |
| 508 | if ((cflag & CRTSCTS) != 0) |
| 509 | control |= (CONTROL_DTR_HIGH | CONTROL_RTS_HIGH); |
| 510 | |
| 511 | /* change control lines if we are switching to or from B0 */ |
| 512 | /* FIXME: |
| 513 | spin_lock_irqsave(&priv->lock, flags); |
| 514 | control = priv->line_control; |
| 515 | if ((cflag & CBAUD) == B0) |
| 516 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
| 517 | else |
| 518 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); |
| 519 | if (control != priv->line_control) { |
| 520 | control = priv->line_control; |
| 521 | spin_unlock_irqrestore(&priv->lock, flags); |
| 522 | set_control_lines(serial->dev, control); |
| 523 | } else { |
| 524 | spin_unlock_irqrestore(&priv->lock, flags); |
| 525 | } |
| 526 | */ |
| 527 | |
| 528 | spin_lock_irqsave(&priv->lock, flags); |
| 529 | if (divisor != priv->pending_setup.divisor |
| 530 | || control != priv->pending_setup.control |
| 531 | || frame_fmt != priv->pending_setup.frame_fmt) { |
| 532 | priv->pending_setup.divisor = divisor; |
| 533 | priv->pending_setup.control = control; |
| 534 | priv->pending_setup.frame_fmt = frame_fmt; |
| 535 | } |
| 536 | spin_unlock_irqrestore(&priv->lock, flags); |
| 537 | } |
| 538 | |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 539 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 540 | { |
| 541 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
| 542 | struct ktermios tmp_termios; |
| 543 | struct usb_serial *serial = port->serial; |
| 544 | struct oti6858_control_pkt *buf; |
| 545 | unsigned long flags; |
| 546 | int result; |
| 547 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 548 | dbg("%s(port = %d)", __func__, port->number); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 549 | |
| 550 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
| 551 | usb_clear_halt(serial->dev, port->read_urb->pipe); |
| 552 | |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 553 | buf = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
| 554 | if (buf == NULL) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 555 | dev_err(&port->dev, "%s(): out of memory!\n", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 556 | return -ENOMEM; |
| 557 | } |
| 558 | |
| 559 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| 560 | OTI6858_REQ_T_GET_STATUS, |
| 561 | OTI6858_REQ_GET_STATUS, |
| 562 | 0, 0, |
| 563 | buf, OTI6858_CTRL_PKT_SIZE, |
| 564 | 100); |
| 565 | if (result != OTI6858_CTRL_PKT_SIZE) { |
| 566 | /* assume default (after power-on reset) values */ |
| 567 | buf->divisor = cpu_to_le16(0x009c); /* 38400 bps */ |
| 568 | buf->frame_fmt = 0x03; /* 8N1 */ |
| 569 | buf->something = 0x43; |
| 570 | buf->control = 0x4c; /* DTR, RTS */ |
| 571 | buf->tx_status = 0x00; |
| 572 | buf->pin_state = 0x5b; /* RTS, CTS, DSR, DTR, RI, DCD */ |
| 573 | buf->rx_bytes_avail = 0x00; |
| 574 | } |
| 575 | |
| 576 | spin_lock_irqsave(&priv->lock, flags); |
| 577 | memcpy(&priv->status, buf, OTI6858_CTRL_PKT_SIZE); |
| 578 | priv->pending_setup.divisor = buf->divisor; |
| 579 | priv->pending_setup.frame_fmt = buf->frame_fmt; |
| 580 | priv->pending_setup.control = buf->control; |
| 581 | spin_unlock_irqrestore(&priv->lock, flags); |
| 582 | kfree(buf); |
| 583 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 584 | dbg("%s(): submitting interrupt urb", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 585 | port->interrupt_in_urb->dev = serial->dev; |
| 586 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
| 587 | if (result != 0) { |
| 588 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 589 | " with error %d\n", __func__, result); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 590 | oti6858_close(port); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 591 | return -EPROTO; |
| 592 | } |
| 593 | |
| 594 | /* setup termios */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 595 | if (tty) |
| 596 | oti6858_set_termios(tty, port, &tmp_termios); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 597 | port->port.drain_delay = 256; /* FIXME: check the FIFO length */ |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 598 | return 0; |
| 599 | } |
| 600 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 601 | static void oti6858_close(struct usb_serial_port *port) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 602 | { |
| 603 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
| 604 | unsigned long flags; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 605 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 606 | dbg("%s(port = %d)", __func__, port->number); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 607 | |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 608 | spin_lock_irqsave(&port->lock, flags); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 609 | /* clear out any remaining data in the buffer */ |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 610 | kfifo_reset_out(&port->write_fifo); |
| 611 | spin_unlock_irqrestore(&port->lock, flags); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 612 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 613 | dbg("%s(): after buf_clear()", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 614 | |
| 615 | /* cancel scheduled setup */ |
| 616 | cancel_delayed_work(&priv->delayed_setup_work); |
| 617 | cancel_delayed_work(&priv->delayed_write_work); |
| 618 | flush_scheduled_work(); |
| 619 | |
| 620 | /* shutdown our urbs */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 621 | dbg("%s(): shutting down urbs", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 622 | usb_kill_urb(port->write_urb); |
| 623 | usb_kill_urb(port->read_urb); |
| 624 | usb_kill_urb(port->interrupt_in_urb); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 625 | } |
| 626 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 627 | static int oti6858_tiocmset(struct tty_struct *tty, struct file *file, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 628 | unsigned int set, unsigned int clear) |
| 629 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 630 | struct usb_serial_port *port = tty->driver_data; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 631 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
| 632 | unsigned long flags; |
| 633 | u8 control; |
| 634 | |
| 635 | dbg("%s(port = %d, set = 0x%08x, clear = 0x%08x)", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 636 | __func__, port->number, set, clear); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 637 | |
| 638 | if (!usb_get_intfdata(port->serial->interface)) |
| 639 | return -ENODEV; |
| 640 | |
| 641 | /* FIXME: check if this is correct (active high/low) */ |
| 642 | spin_lock_irqsave(&priv->lock, flags); |
| 643 | control = priv->pending_setup.control; |
| 644 | if ((set & TIOCM_RTS) != 0) |
| 645 | control |= CONTROL_RTS_HIGH; |
| 646 | if ((set & TIOCM_DTR) != 0) |
| 647 | control |= CONTROL_DTR_HIGH; |
| 648 | if ((clear & TIOCM_RTS) != 0) |
| 649 | control &= ~CONTROL_RTS_HIGH; |
| 650 | if ((clear & TIOCM_DTR) != 0) |
| 651 | control &= ~CONTROL_DTR_HIGH; |
| 652 | |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 653 | if (control != priv->pending_setup.control) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 654 | priv->pending_setup.control = control; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 655 | |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 656 | spin_unlock_irqrestore(&priv->lock, flags); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 657 | return 0; |
| 658 | } |
| 659 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 660 | static int oti6858_tiocmget(struct tty_struct *tty, struct file *file) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 661 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 662 | struct usb_serial_port *port = tty->driver_data; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 663 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
| 664 | unsigned long flags; |
| 665 | unsigned pin_state; |
| 666 | unsigned result = 0; |
| 667 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 668 | dbg("%s(port = %d)", __func__, port->number); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 669 | |
| 670 | if (!usb_get_intfdata(port->serial->interface)) |
| 671 | return -ENODEV; |
| 672 | |
| 673 | spin_lock_irqsave(&priv->lock, flags); |
| 674 | pin_state = priv->status.pin_state & PIN_MASK; |
| 675 | spin_unlock_irqrestore(&priv->lock, flags); |
| 676 | |
| 677 | /* FIXME: check if this is correct (active high/low) */ |
| 678 | if ((pin_state & PIN_RTS) != 0) |
| 679 | result |= TIOCM_RTS; |
| 680 | if ((pin_state & PIN_CTS) != 0) |
| 681 | result |= TIOCM_CTS; |
| 682 | if ((pin_state & PIN_DSR) != 0) |
| 683 | result |= TIOCM_DSR; |
| 684 | if ((pin_state & PIN_DTR) != 0) |
| 685 | result |= TIOCM_DTR; |
| 686 | if ((pin_state & PIN_RI) != 0) |
| 687 | result |= TIOCM_RI; |
| 688 | if ((pin_state & PIN_DCD) != 0) |
| 689 | result |= TIOCM_CD; |
| 690 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 691 | dbg("%s() = 0x%08x", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 692 | |
| 693 | return result; |
| 694 | } |
| 695 | |
| 696 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) |
| 697 | { |
| 698 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
| 699 | unsigned long flags; |
| 700 | unsigned int prev, status; |
| 701 | unsigned int changed; |
| 702 | |
| 703 | spin_lock_irqsave(&priv->lock, flags); |
| 704 | prev = priv->status.pin_state; |
| 705 | spin_unlock_irqrestore(&priv->lock, flags); |
| 706 | |
| 707 | while (1) { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 708 | wait_event_interruptible(priv->intr_wait, |
| 709 | priv->status.pin_state != prev); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 710 | if (signal_pending(current)) |
| 711 | return -ERESTARTSYS; |
| 712 | |
| 713 | spin_lock_irqsave(&priv->lock, flags); |
| 714 | status = priv->status.pin_state & PIN_MASK; |
| 715 | spin_unlock_irqrestore(&priv->lock, flags); |
| 716 | |
| 717 | changed = prev ^ status; |
| 718 | /* FIXME: check if this is correct (active high/low) */ |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 719 | if (((arg & TIOCM_RNG) && (changed & PIN_RI)) || |
| 720 | ((arg & TIOCM_DSR) && (changed & PIN_DSR)) || |
| 721 | ((arg & TIOCM_CD) && (changed & PIN_DCD)) || |
| 722 | ((arg & TIOCM_CTS) && (changed & PIN_CTS))) |
| 723 | return 0; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 724 | prev = status; |
| 725 | } |
| 726 | |
| 727 | /* NOTREACHED */ |
| 728 | return 0; |
| 729 | } |
| 730 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 731 | static int oti6858_ioctl(struct tty_struct *tty, struct file *file, |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 732 | unsigned int cmd, unsigned long arg) |
| 733 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 734 | struct usb_serial_port *port = tty->driver_data; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 735 | |
| 736 | dbg("%s(port = %d, cmd = 0x%04x, arg = 0x%08lx)", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 737 | __func__, port->number, cmd, arg); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 738 | |
| 739 | switch (cmd) { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 740 | case TIOCMIWAIT: |
| 741 | dbg("%s(): TIOCMIWAIT", __func__); |
| 742 | return wait_modem_info(port, arg); |
| 743 | default: |
| 744 | dbg("%s(): 0x%04x not supported", __func__, cmd); |
| 745 | break; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 746 | } |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 747 | return -ENOIOCTLCMD; |
| 748 | } |
| 749 | |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 750 | |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 751 | static void oti6858_release(struct usb_serial *serial) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 752 | { |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 753 | int i; |
| 754 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 755 | dbg("%s()", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 756 | |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 757 | for (i = 0; i < serial->num_ports; ++i) |
| 758 | kfree(usb_get_serial_port_data(serial->port[i])); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | static void oti6858_read_int_callback(struct urb *urb) |
| 762 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 763 | struct usb_serial_port *port = urb->context; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 764 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
| 765 | int transient = 0, can_recv = 0, resubmit = 1; |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 766 | int status = urb->status; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 767 | |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 768 | dbg("%s(port = %d, status = %d)", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 769 | __func__, port->number, status); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 770 | |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 771 | switch (status) { |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 772 | case 0: |
| 773 | /* success */ |
| 774 | break; |
| 775 | case -ECONNRESET: |
| 776 | case -ENOENT: |
| 777 | case -ESHUTDOWN: |
| 778 | /* this urb is terminated, clean up */ |
| 779 | dbg("%s(): urb shutting down with status: %d", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 780 | __func__, status); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 781 | return; |
| 782 | default: |
| 783 | dbg("%s(): nonzero urb status received: %d", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 784 | __func__, status); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 785 | break; |
| 786 | } |
| 787 | |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 788 | if (status == 0 && urb->actual_length == OTI6858_CTRL_PKT_SIZE) { |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 789 | struct oti6858_control_pkt *xs = urb->transfer_buffer; |
| 790 | unsigned long flags; |
| 791 | |
| 792 | spin_lock_irqsave(&priv->lock, flags); |
| 793 | |
| 794 | if (!priv->transient) { |
| 795 | if (!OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { |
| 796 | if (xs->rx_bytes_avail == 0) { |
| 797 | priv->transient = 4; |
| 798 | priv->setup_done = 0; |
| 799 | resubmit = 0; |
| 800 | dbg("%s(): scheduling setup_line()", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 801 | __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 802 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
| 803 | } |
| 804 | } |
| 805 | } else { |
| 806 | if (OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { |
| 807 | priv->transient = 0; |
| 808 | } else if (!priv->setup_done) { |
| 809 | resubmit = 0; |
| 810 | } else if (--priv->transient == 0) { |
| 811 | if (xs->rx_bytes_avail == 0) { |
| 812 | priv->transient = 4; |
| 813 | priv->setup_done = 0; |
| 814 | resubmit = 0; |
| 815 | dbg("%s(): scheduling setup_line()", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 816 | __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 817 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
| 818 | } |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | if (!priv->transient) { |
| 823 | if (xs->pin_state != priv->status.pin_state) |
| 824 | wake_up_interruptible(&priv->intr_wait); |
| 825 | memcpy(&priv->status, xs, OTI6858_CTRL_PKT_SIZE); |
| 826 | } |
| 827 | |
| 828 | if (!priv->transient && xs->rx_bytes_avail != 0) { |
| 829 | can_recv = xs->rx_bytes_avail; |
| 830 | priv->flags.read_urb_in_use = 1; |
| 831 | } |
| 832 | |
| 833 | transient = priv->transient; |
| 834 | spin_unlock_irqrestore(&priv->lock, flags); |
| 835 | } |
| 836 | |
| 837 | if (can_recv) { |
| 838 | int result; |
| 839 | |
| 840 | port->read_urb->dev = port->serial->dev; |
| 841 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| 842 | if (result != 0) { |
| 843 | priv->flags.read_urb_in_use = 0; |
| 844 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 845 | " error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 846 | } else { |
| 847 | resubmit = 0; |
| 848 | } |
| 849 | } else if (!transient) { |
| 850 | unsigned long flags; |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 851 | int count; |
| 852 | |
| 853 | spin_lock_irqsave(&port->lock, flags); |
| 854 | count = kfifo_len(&port->write_fifo); |
| 855 | spin_unlock_irqrestore(&port->lock, flags); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 856 | |
| 857 | spin_lock_irqsave(&priv->lock, flags); |
Johan Hovold | 28f27dc | 2010-05-16 20:33:52 +0200 | [diff] [blame] | 858 | if (priv->flags.write_urb_in_use == 0 && count != 0) { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 859 | schedule_delayed_work(&priv->delayed_write_work, 0); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 860 | resubmit = 0; |
| 861 | } |
| 862 | spin_unlock_irqrestore(&priv->lock, flags); |
| 863 | } |
| 864 | |
| 865 | if (resubmit) { |
| 866 | int result; |
| 867 | |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 868 | /* dbg("%s(): submitting interrupt urb", __func__); */ |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 869 | urb->dev = port->serial->dev; |
| 870 | result = usb_submit_urb(urb, GFP_ATOMIC); |
| 871 | if (result != 0) { |
| 872 | dev_err(&urb->dev->dev, |
| 873 | "%s(): usb_submit_urb() failed with" |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 874 | " error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 875 | } |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | static void oti6858_read_bulk_callback(struct urb *urb) |
| 880 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 881 | struct usb_serial_port *port = urb->context; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 882 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
| 883 | struct tty_struct *tty; |
| 884 | unsigned char *data = urb->transfer_buffer; |
| 885 | unsigned long flags; |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 886 | int status = urb->status; |
Alan Cox | b0a239d | 2008-01-19 16:02:37 +0000 | [diff] [blame] | 887 | int result; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 888 | |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 889 | dbg("%s(port = %d, status = %d)", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 890 | __func__, port->number, status); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 891 | |
| 892 | spin_lock_irqsave(&priv->lock, flags); |
| 893 | priv->flags.read_urb_in_use = 0; |
| 894 | spin_unlock_irqrestore(&priv->lock, flags); |
| 895 | |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 896 | if (status != 0) { |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 897 | /* |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 898 | if (status == -EPROTO) { |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 899 | * PL2303 mysteriously fails with -EPROTO reschedule |
| 900 | the read * |
| 901 | dbg("%s - caught -EPROTO, resubmitting the urb", |
| 902 | __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 903 | result = usb_submit_urb(urb, GFP_ATOMIC); |
| 904 | if (result) |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 905 | dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 906 | return; |
| 907 | } |
| 908 | */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 909 | dbg("%s(): unable to handle the error, exiting", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 910 | return; |
| 911 | } |
| 912 | |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 913 | tty = tty_port_tty_get(&port->port); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 914 | if (tty != NULL && urb->actual_length > 0) { |
Alan Cox | b0a239d | 2008-01-19 16:02:37 +0000 | [diff] [blame] | 915 | tty_insert_flip_string(tty, data, urb->actual_length); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 916 | tty_flip_buffer_push(tty); |
| 917 | } |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 918 | tty_kref_put(tty); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 919 | |
Alan Stern | 1f87158 | 2010-02-17 10:05:47 -0500 | [diff] [blame] | 920 | /* schedule the interrupt urb */ |
| 921 | port->interrupt_in_urb->dev = port->serial->dev; |
| 922 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
| 923 | if (result != 0 && result != -EPERM) { |
| 924 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," |
| 925 | " error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 926 | } |
| 927 | } |
| 928 | |
| 929 | static void oti6858_write_bulk_callback(struct urb *urb) |
| 930 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 931 | struct usb_serial_port *port = urb->context; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 932 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 933 | int status = urb->status; |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 934 | int result; |
| 935 | |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 936 | dbg("%s(port = %d, status = %d)", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 937 | __func__, port->number, status); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 938 | |
Greg Kroah-Hartman | 78c26ae | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 939 | switch (status) { |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 940 | case 0: |
| 941 | /* success */ |
| 942 | break; |
| 943 | case -ECONNRESET: |
| 944 | case -ENOENT: |
| 945 | case -ESHUTDOWN: |
| 946 | /* this urb is terminated, clean up */ |
| 947 | dbg("%s(): urb shutting down with status: %d", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 948 | __func__, status); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 949 | priv->flags.write_urb_in_use = 0; |
| 950 | return; |
| 951 | default: |
| 952 | /* error in the urb, so we have to resubmit it */ |
| 953 | dbg("%s(): nonzero write bulk status received: %d", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 954 | __func__, status); |
| 955 | dbg("%s(): overflow in write", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 956 | |
| 957 | port->write_urb->transfer_buffer_length = 1; |
| 958 | port->write_urb->dev = port->serial->dev; |
| 959 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
| 960 | if (result) { |
| 961 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 962 | " error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 963 | } else { |
| 964 | return; |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | priv->flags.write_urb_in_use = 0; |
| 969 | |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 970 | /* schedule the interrupt urb if we are still open */ |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 971 | port->interrupt_in_urb->dev = port->serial->dev; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 972 | dbg("%s(): submitting interrupt urb", __func__); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 973 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
| 974 | if (result != 0) { |
| 975 | dev_err(&port->dev, "%s(): failed submitting int urb," |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 976 | " error %d\n", __func__, result); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 977 | } |
| 978 | } |
| 979 | |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 980 | /* module description and (de)initialization */ |
| 981 | |
| 982 | static int __init oti6858_init(void) |
| 983 | { |
| 984 | int retval; |
| 985 | |
Alan Cox | 2a77c81 | 2008-07-22 11:15:36 +0100 | [diff] [blame] | 986 | retval = usb_serial_register(&oti6858_device); |
| 987 | if (retval == 0) { |
| 988 | retval = usb_register(&oti6858_driver); |
| 989 | if (retval) |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 990 | usb_serial_deregister(&oti6858_device); |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 991 | } |
Kees Lemmens | 49cdee0 | 2007-03-27 12:34:30 +0200 | [diff] [blame] | 992 | return retval; |
| 993 | } |
| 994 | |
| 995 | static void __exit oti6858_exit(void) |
| 996 | { |
| 997 | usb_deregister(&oti6858_driver); |
| 998 | usb_serial_deregister(&oti6858_device); |
| 999 | } |
| 1000 | |
| 1001 | module_init(oti6858_init); |
| 1002 | module_exit(oti6858_exit); |
| 1003 | |
| 1004 | MODULE_DESCRIPTION(OTI6858_DESCRIPTION); |
| 1005 | MODULE_AUTHOR(OTI6858_AUTHOR); |
| 1006 | MODULE_VERSION(OTI6858_VERSION); |
| 1007 | MODULE_LICENSE("GPL"); |
| 1008 | |
| 1009 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 1010 | MODULE_PARM_DESC(debug, "enable debug output"); |
| 1011 | |