Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 1 | /* |
| 2 | * AirPrime CDMA Wireless Serial USB driver |
| 3 | * |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 4 | * Copyright (C) 2005-2006 Greg Kroah-Hartman <gregkh@suse.de> |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License version |
| 8 | * 2 as published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/tty.h> |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 14 | #include <linux/tty_flip.h> |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 17 | #include <linux/usb/serial.h> |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 18 | |
| 19 | static struct usb_device_id id_table [] = { |
Timothy Sipples | 34ab86e | 2006-06-16 20:42:59 +0900 | [diff] [blame] | 20 | { USB_DEVICE(0x0c88, 0x17da) }, /* Kyocera Wireless KPC650/Passport */ |
Eagle Jones | 87f28bd | 2006-11-24 16:40:04 -0800 | [diff] [blame] | 21 | { USB_DEVICE(0x413c, 0x8115) }, /* Dell Wireless HSDPA 5500 */ |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 22 | { }, |
| 23 | }; |
| 24 | MODULE_DEVICE_TABLE(usb, id_table); |
| 25 | |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 26 | #define URB_TRANSFER_BUFFER_SIZE 4096 |
| 27 | #define NUM_READ_URBS 4 |
| 28 | #define NUM_WRITE_URBS 4 |
| 29 | #define NUM_BULK_EPS 3 |
| 30 | #define MAX_BULK_EPS 6 |
| 31 | |
| 32 | /* if overridden by the user, then use their value for the size of the |
| 33 | * read and write urbs, and the number of endpoints */ |
| 34 | static int buffer_size = URB_TRANSFER_BUFFER_SIZE; |
| 35 | static int endpoints = NUM_BULK_EPS; |
| 36 | static int debug; |
| 37 | struct airprime_private { |
| 38 | spinlock_t lock; |
| 39 | int outstanding_urbs; |
| 40 | int throttled; |
| 41 | struct urb *read_urbp[NUM_READ_URBS]; |
Martin Schiller | cf0cb1a | 2007-03-01 13:49:48 +0100 | [diff] [blame] | 42 | |
| 43 | /* Settings for the port */ |
| 44 | int rts_state; /* Handshaking pins (outputs) */ |
| 45 | int dtr_state; |
| 46 | int cts_state; /* Handshaking pins (inputs) */ |
| 47 | int dsr_state; |
| 48 | int dcd_state; |
| 49 | int ri_state; |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 50 | }; |
| 51 | |
Martin Schiller | cf0cb1a | 2007-03-01 13:49:48 +0100 | [diff] [blame] | 52 | static int airprime_send_setup(struct usb_serial_port *port) |
| 53 | { |
| 54 | struct usb_serial *serial = port->serial; |
| 55 | struct airprime_private *priv; |
| 56 | |
| 57 | dbg("%s", __FUNCTION__); |
| 58 | |
| 59 | if (port->number != 0) |
| 60 | return 0; |
| 61 | |
| 62 | priv = usb_get_serial_port_data(port); |
| 63 | |
| 64 | if (port->tty) { |
| 65 | int val = 0; |
| 66 | if (priv->dtr_state) |
| 67 | val |= 0x01; |
| 68 | if (priv->rts_state) |
| 69 | val |= 0x02; |
| 70 | |
| 71 | return usb_control_msg(serial->dev, |
| 72 | usb_rcvctrlpipe(serial->dev, 0), |
| 73 | 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT); |
| 74 | } |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 79 | static void airprime_read_bulk_callback(struct urb *urb) |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 80 | { |
| 81 | struct usb_serial_port *port = urb->context; |
| 82 | unsigned char *data = urb->transfer_buffer; |
| 83 | struct tty_struct *tty; |
| 84 | int result; |
| 85 | |
| 86 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 87 | |
| 88 | if (urb->status) { |
| 89 | dbg("%s - nonzero read bulk status received: %d", |
| 90 | __FUNCTION__, urb->status); |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 91 | return; |
| 92 | } |
| 93 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); |
| 94 | |
| 95 | tty = port->tty; |
| 96 | if (tty && urb->actual_length) { |
| 97 | tty_insert_flip_string (tty, data, urb->actual_length); |
| 98 | tty_flip_buffer_push (tty); |
| 99 | } |
| 100 | |
| 101 | result = usb_submit_urb (urb, GFP_ATOMIC); |
| 102 | if (result) |
| 103 | dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", |
| 104 | __FUNCTION__, result); |
| 105 | return; |
| 106 | } |
| 107 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 108 | static void airprime_write_bulk_callback(struct urb *urb) |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 109 | { |
| 110 | struct usb_serial_port *port = urb->context; |
| 111 | struct airprime_private *priv = usb_get_serial_port_data(port); |
| 112 | unsigned long flags; |
| 113 | |
| 114 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 115 | |
| 116 | /* free up the transfer buffer, as usb_free_urb() does not do this */ |
| 117 | kfree (urb->transfer_buffer); |
| 118 | |
| 119 | if (urb->status) |
| 120 | dbg("%s - nonzero write bulk status received: %d", |
| 121 | __FUNCTION__, urb->status); |
| 122 | spin_lock_irqsave(&priv->lock, flags); |
| 123 | --priv->outstanding_urbs; |
| 124 | spin_unlock_irqrestore(&priv->lock, flags); |
| 125 | |
| 126 | usb_serial_port_softint(port); |
| 127 | } |
| 128 | |
| 129 | static int airprime_open(struct usb_serial_port *port, struct file *filp) |
| 130 | { |
| 131 | struct airprime_private *priv = usb_get_serial_port_data(port); |
| 132 | struct usb_serial *serial = port->serial; |
| 133 | struct urb *urb; |
| 134 | char *buffer = NULL; |
| 135 | int i; |
| 136 | int result = 0; |
| 137 | |
| 138 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 139 | |
| 140 | /* initialize our private data structure if it isn't already created */ |
| 141 | if (!priv) { |
| 142 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
| 143 | if (!priv) { |
| 144 | result = -ENOMEM; |
| 145 | goto out; |
| 146 | } |
| 147 | spin_lock_init(&priv->lock); |
| 148 | usb_set_serial_port_data(port, priv); |
| 149 | } |
| 150 | |
Martin Schiller | cf0cb1a | 2007-03-01 13:49:48 +0100 | [diff] [blame] | 151 | /* Set some sane defaults */ |
| 152 | priv->rts_state = 1; |
| 153 | priv->dtr_state = 1; |
| 154 | |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 155 | for (i = 0; i < NUM_READ_URBS; ++i) { |
| 156 | buffer = kmalloc(buffer_size, GFP_KERNEL); |
| 157 | if (!buffer) { |
| 158 | dev_err(&port->dev, "%s - out of memory.\n", |
| 159 | __FUNCTION__); |
| 160 | result = -ENOMEM; |
| 161 | goto errout; |
| 162 | } |
| 163 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 164 | if (!urb) { |
Eric Sesterhenn | 0e185b7 | 2006-10-10 14:42:50 -0700 | [diff] [blame] | 165 | kfree(buffer); |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 166 | dev_err(&port->dev, "%s - no more urbs?\n", |
| 167 | __FUNCTION__); |
| 168 | result = -ENOMEM; |
| 169 | goto errout; |
| 170 | } |
| 171 | usb_fill_bulk_urb(urb, serial->dev, |
| 172 | usb_rcvbulkpipe(serial->dev, |
| 173 | port->bulk_out_endpointAddress), |
| 174 | buffer, buffer_size, |
| 175 | airprime_read_bulk_callback, port); |
| 176 | result = usb_submit_urb(urb, GFP_KERNEL); |
| 177 | if (result) { |
Pete Zaitcev | af59cf4 | 2007-02-02 23:13:14 -0800 | [diff] [blame] | 178 | usb_free_urb(urb); |
| 179 | kfree(buffer); |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 180 | dev_err(&port->dev, |
| 181 | "%s - failed submitting read urb %d for port %d, error %d\n", |
| 182 | __FUNCTION__, i, port->number, result); |
| 183 | goto errout; |
| 184 | } |
| 185 | /* remember this urb so we can kill it when the port is closed */ |
| 186 | priv->read_urbp[i] = urb; |
| 187 | } |
Martin Schiller | cf0cb1a | 2007-03-01 13:49:48 +0100 | [diff] [blame] | 188 | |
| 189 | airprime_send_setup(port); |
| 190 | |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 191 | goto out; |
| 192 | |
| 193 | errout: |
| 194 | /* some error happened, cancel any submitted urbs and clean up anything that |
| 195 | got allocated successfully */ |
| 196 | |
Pete Zaitcev | af59cf4 | 2007-02-02 23:13:14 -0800 | [diff] [blame] | 197 | while (i-- != 0) { |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 198 | urb = priv->read_urbp[i]; |
Pete Zaitcev | af59cf4 | 2007-02-02 23:13:14 -0800 | [diff] [blame] | 199 | buffer = urb->transfer_buffer; |
| 200 | usb_kill_urb (urb); |
| 201 | usb_free_urb (urb); |
| 202 | kfree (buffer); |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | out: |
| 206 | return result; |
| 207 | } |
| 208 | |
| 209 | static void airprime_close(struct usb_serial_port *port, struct file * filp) |
| 210 | { |
| 211 | struct airprime_private *priv = usb_get_serial_port_data(port); |
| 212 | int i; |
| 213 | |
| 214 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 215 | |
Martin Schiller | cf0cb1a | 2007-03-01 13:49:48 +0100 | [diff] [blame] | 216 | priv->rts_state = 0; |
| 217 | priv->dtr_state = 0; |
| 218 | |
| 219 | airprime_send_setup(port); |
| 220 | |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 221 | for (i = 0; i < NUM_READ_URBS; ++i) { |
| 222 | usb_kill_urb (priv->read_urbp[i]); |
Pete Zaitcev | af59cf4 | 2007-02-02 23:13:14 -0800 | [diff] [blame] | 223 | kfree (priv->read_urbp[i]->transfer_buffer); |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 224 | usb_free_urb (priv->read_urbp[i]); |
| 225 | } |
| 226 | |
| 227 | /* free up private structure */ |
| 228 | kfree (priv); |
| 229 | usb_set_serial_port_data(port, NULL); |
| 230 | } |
| 231 | |
| 232 | static int airprime_write(struct usb_serial_port *port, |
| 233 | const unsigned char *buf, int count) |
| 234 | { |
| 235 | struct airprime_private *priv = usb_get_serial_port_data(port); |
| 236 | struct usb_serial *serial = port->serial; |
| 237 | struct urb *urb; |
| 238 | unsigned char *buffer; |
| 239 | unsigned long flags; |
| 240 | int status; |
| 241 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 242 | |
| 243 | spin_lock_irqsave(&priv->lock, flags); |
| 244 | if (priv->outstanding_urbs > NUM_WRITE_URBS) { |
| 245 | spin_unlock_irqrestore(&priv->lock, flags); |
| 246 | dbg("%s - write limit hit\n", __FUNCTION__); |
| 247 | return 0; |
| 248 | } |
| 249 | spin_unlock_irqrestore(&priv->lock, flags); |
| 250 | buffer = kmalloc(count, GFP_ATOMIC); |
| 251 | if (!buffer) { |
| 252 | dev_err(&port->dev, "out of memory\n"); |
| 253 | return -ENOMEM; |
| 254 | } |
| 255 | urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 256 | if (!urb) { |
| 257 | dev_err(&port->dev, "no more free urbs\n"); |
| 258 | kfree (buffer); |
| 259 | return -ENOMEM; |
| 260 | } |
| 261 | memcpy (buffer, buf, count); |
| 262 | |
| 263 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, buffer); |
| 264 | |
| 265 | usb_fill_bulk_urb(urb, serial->dev, |
| 266 | usb_sndbulkpipe(serial->dev, |
| 267 | port->bulk_out_endpointAddress), |
| 268 | buffer, count, |
| 269 | airprime_write_bulk_callback, port); |
| 270 | |
| 271 | /* send it down the pipe */ |
| 272 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 273 | if (status) { |
| 274 | dev_err(&port->dev, |
| 275 | "%s - usb_submit_urb(write bulk) failed with status = %d\n", |
| 276 | __FUNCTION__, status); |
| 277 | count = status; |
| 278 | kfree (buffer); |
| 279 | } else { |
| 280 | spin_lock_irqsave(&priv->lock, flags); |
| 281 | ++priv->outstanding_urbs; |
| 282 | spin_unlock_irqrestore(&priv->lock, flags); |
| 283 | } |
| 284 | /* we are done with this urb, so let the host driver |
| 285 | * really free it when it is finished with it */ |
| 286 | usb_free_urb (urb); |
| 287 | return count; |
| 288 | } |
| 289 | |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 290 | static struct usb_driver airprime_driver = { |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 291 | .name = "airprime", |
| 292 | .probe = usb_serial_probe, |
| 293 | .disconnect = usb_serial_disconnect, |
| 294 | .id_table = id_table, |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 295 | .no_dynamic_id = 1, |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 296 | }; |
| 297 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 298 | static struct usb_serial_driver airprime_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 299 | .driver = { |
| 300 | .owner = THIS_MODULE, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 301 | .name = "airprime", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 302 | }, |
Johannes Hölzl | d9b1b78 | 2006-12-17 21:50:24 +0100 | [diff] [blame] | 303 | .usb_driver = &airprime_driver, |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 304 | .id_table = id_table, |
| 305 | .num_interrupt_in = NUM_DONT_CARE, |
| 306 | .num_bulk_in = NUM_DONT_CARE, |
| 307 | .num_bulk_out = NUM_DONT_CARE, |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 308 | .open = airprime_open, |
| 309 | .close = airprime_close, |
| 310 | .write = airprime_write, |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 311 | }; |
| 312 | |
| 313 | static int __init airprime_init(void) |
| 314 | { |
| 315 | int retval; |
| 316 | |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 317 | airprime_device.num_ports = |
| 318 | (endpoints > 0 && endpoints <= MAX_BULK_EPS) ? endpoints : NUM_BULK_EPS; |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 319 | retval = usb_serial_register(&airprime_device); |
| 320 | if (retval) |
| 321 | return retval; |
| 322 | retval = usb_register(&airprime_driver); |
| 323 | if (retval) |
| 324 | usb_serial_deregister(&airprime_device); |
| 325 | return retval; |
| 326 | } |
| 327 | |
| 328 | static void __exit airprime_exit(void) |
| 329 | { |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 330 | dbg("%s", __FUNCTION__); |
| 331 | |
Greg KH | 3b86b20 | 2005-04-25 21:46:29 -0700 | [diff] [blame] | 332 | usb_deregister(&airprime_driver); |
| 333 | usb_serial_deregister(&airprime_device); |
| 334 | } |
| 335 | |
| 336 | module_init(airprime_init); |
| 337 | module_exit(airprime_exit); |
| 338 | MODULE_LICENSE("GPL"); |
Andy Gay | 5dda171 | 2006-07-03 18:43:01 -0400 | [diff] [blame] | 339 | |
| 340 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 341 | MODULE_PARM_DESC(debug, "Debug enabled"); |
| 342 | module_param(buffer_size, int, 0); |
| 343 | MODULE_PARM_DESC(buffer_size, "Size of the transfer buffers in bytes (default 4096)"); |
| 344 | module_param(endpoints, int, 0); |
| 345 | MODULE_PARM_DESC(endpoints, "Number of bulk EPs to configure (default 3)"); |