Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 1 | /***************************************************************************** |
| 2 | * |
| 3 | * Filename: mcs7780.c |
| 4 | * Version: 0.4-alpha |
| 5 | * Description: Irda MosChip USB Dongle Driver |
| 6 | * Authors: Lukasz Stelmach <stlman@poczta.fm> |
| 7 | * Brian Pugh <bpugh@cs.pdx.edu> |
| 8 | * Judy Fischbach <jfisch@cs.pdx.edu> |
| 9 | * |
| 10 | * Based on stir4200 driver, but some things done differently. |
| 11 | * Based on earlier driver by Paul Stewart <stewart@parc.com> |
| 12 | * |
| 13 | * Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at> |
| 14 | * Copyright (C) 2001, Dag Brattli <dag@brattli.net> |
| 15 | * Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com> |
| 16 | * Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org> |
| 17 | * Copyright (C) 2005, Lukasz Stelmach <stlman@poczta.fm> |
| 18 | * Copyright (C) 2005, Brian Pugh <bpugh@cs.pdx.edu> |
| 19 | * Copyright (C) 2005, Judy Fischbach <jfisch@cs.pdx.edu> |
| 20 | * |
| 21 | * This program is free software; you can redistribute it and/or modify |
| 22 | * it under the terms of the GNU General Public License as published by |
| 23 | * the Free Software Foundation; either version 2 of the License, or |
| 24 | * (at your option) any later version. |
| 25 | * |
| 26 | * This program is distributed in the hope that it will be useful, |
| 27 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 29 | * GNU General Public License for more details. |
| 30 | * |
| 31 | * You should have received a copy of the GNU General Public License |
| 32 | * along with this program; if not, write to the Free Software |
| 33 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 34 | * |
| 35 | *****************************************************************************/ |
| 36 | |
| 37 | /* |
| 38 | * MCS7780 is a simple USB to IrDA bridge by MosChip. It is neither |
| 39 | * compatibile with irda-usb nor with stir4200. Although it is quite |
| 40 | * similar to the later as far as general idea of operation is concerned. |
| 41 | * That is it requires the software to do all the framing job at SIR speeds. |
| 42 | * The hardware does take care of the framing at MIR and FIR speeds. |
| 43 | * It supports all speeds from 2400 through 4Mbps |
| 44 | */ |
| 45 | |
| 46 | #include <linux/module.h> |
| 47 | #include <linux/moduleparam.h> |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 48 | #include <linux/kernel.h> |
| 49 | #include <linux/types.h> |
| 50 | #include <linux/errno.h> |
| 51 | #include <linux/init.h> |
| 52 | #include <linux/slab.h> |
| 53 | #include <linux/module.h> |
| 54 | #include <linux/kref.h> |
| 55 | #include <linux/usb.h> |
| 56 | #include <linux/device.h> |
| 57 | #include <linux/crc32.h> |
| 58 | |
| 59 | #include <asm/unaligned.h> |
| 60 | #include <asm/byteorder.h> |
| 61 | #include <asm/uaccess.h> |
| 62 | |
| 63 | #include <net/irda/irda.h> |
| 64 | #include <net/irda/wrapper.h> |
| 65 | #include <net/irda/crc.h> |
| 66 | |
| 67 | #include "mcs7780.h" |
| 68 | |
| 69 | #define MCS_VENDOR_ID 0x9710 |
| 70 | #define MCS_PRODUCT_ID 0x7780 |
| 71 | |
| 72 | static struct usb_device_id mcs_table[] = { |
| 73 | /* MosChip Corp., MCS7780 FIR-USB Adapter */ |
| 74 | {USB_DEVICE(MCS_VENDOR_ID, MCS_PRODUCT_ID)}, |
| 75 | {}, |
| 76 | }; |
| 77 | |
| 78 | MODULE_AUTHOR("Brian Pugh <bpugh@cs.pdx.edu>"); |
| 79 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver for MosChip MCS7780"); |
| 80 | MODULE_VERSION("0.3alpha"); |
| 81 | MODULE_LICENSE("GPL"); |
| 82 | |
| 83 | MODULE_DEVICE_TABLE(usb, mcs_table); |
| 84 | |
| 85 | static int qos_mtt_bits = 0x07 /* > 1ms */ ; |
| 86 | module_param(qos_mtt_bits, int, 0); |
| 87 | MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time"); |
| 88 | |
| 89 | static int receive_mode = 0x1; |
| 90 | module_param(receive_mode, int, 0); |
| 91 | MODULE_PARM_DESC(receive_mode, |
| 92 | "Receive mode of the device (1:fast, 0:slow, default:1)"); |
| 93 | |
| 94 | static int sir_tweak = 1; |
| 95 | module_param(sir_tweak, int, 0444); |
| 96 | MODULE_PARM_DESC(sir_tweak, |
| 97 | "Default pulse width (1:1.6us, 0:3/16 bit, default:1)."); |
| 98 | |
| 99 | static int transceiver_type = MCS_TSC_VISHAY; |
| 100 | module_param(transceiver_type, int, 0444); |
| 101 | MODULE_PARM_DESC(transceiver_type, "IR transceiver type, see mcs7780.h."); |
| 102 | |
Adrian Bunk | 7263ade | 2006-06-29 12:39:07 -0700 | [diff] [blame] | 103 | static struct usb_driver mcs_driver = { |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 104 | .name = "mcs7780", |
| 105 | .probe = mcs_probe, |
| 106 | .disconnect = mcs_disconnect, |
| 107 | .id_table = mcs_table, |
| 108 | }; |
| 109 | |
| 110 | /* speed flag selection by direct addressing. |
| 111 | addr = (speed >> 8) & 0x0f |
| 112 | |
| 113 | 0x1 57600 0x2 115200 0x4 1152000 0x5 9600 |
| 114 | 0x6 38400 0x9 2400 0xa 576000 0xb 19200 |
| 115 | |
| 116 | 4Mbps (or 2400) must be checked separately. Since it also has |
| 117 | to be programmed in a different manner that is not a big problem. |
| 118 | */ |
| 119 | static __u16 mcs_speed_set[16] = { 0, |
| 120 | MCS_SPEED_57600, |
| 121 | MCS_SPEED_115200, |
| 122 | 0, |
| 123 | MCS_SPEED_1152000, |
| 124 | MCS_SPEED_9600, |
| 125 | MCS_SPEED_38400, |
| 126 | 0, 0, |
| 127 | MCS_SPEED_2400, |
| 128 | MCS_SPEED_576000, |
| 129 | MCS_SPEED_19200, |
| 130 | 0, 0, 0, |
| 131 | }; |
| 132 | |
| 133 | /* Set given 16 bit register with a 16 bit value. Send control message |
| 134 | * to set dongle register. */ |
| 135 | static int mcs_set_reg(struct mcs_cb *mcs, __u16 reg, __u16 val) |
| 136 | { |
| 137 | struct usb_device *dev = mcs->usbdev; |
| 138 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
| 139 | MCS_WR_RTYPE, val, reg, NULL, 0, |
| 140 | msecs_to_jiffies(MCS_CTRL_TIMEOUT)); |
| 141 | } |
| 142 | |
| 143 | /* Get 16 bit register value. Send contol message to read dongle register. */ |
| 144 | static int mcs_get_reg(struct mcs_cb *mcs, __u16 reg, __u16 * val) |
| 145 | { |
| 146 | struct usb_device *dev = mcs->usbdev; |
| 147 | int ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
| 148 | MCS_RD_RTYPE, 0, reg, val, 2, |
| 149 | msecs_to_jiffies(MCS_CTRL_TIMEOUT)); |
| 150 | |
| 151 | return ret; |
| 152 | } |
| 153 | |
| 154 | /* Setup a communication between mcs7780 and TFDU chips. It is described |
| 155 | * in more detail in the data sheet. The setup sequence puts the the |
| 156 | * vishay tranceiver into high speed mode. It will also receive SIR speed |
| 157 | * packets but at reduced sensitivity. |
| 158 | */ |
| 159 | |
| 160 | /* 0: OK 1:ERROR */ |
| 161 | static inline int mcs_setup_transceiver_vishay(struct mcs_cb *mcs) |
| 162 | { |
| 163 | int ret = 0; |
| 164 | __u16 rval; |
| 165 | |
| 166 | /* mcs_get_reg should read exactly two bytes from the dongle */ |
| 167 | ret = mcs_get_reg(mcs, MCS_XCVR_REG, &rval); |
| 168 | if (unlikely(ret != 2)) { |
| 169 | ret = -EIO; |
| 170 | goto error; |
| 171 | } |
| 172 | |
| 173 | /* The MCS_XCVR_CONF bit puts the transceiver into configuration |
| 174 | * mode. The MCS_MODE0 bit must start out high (1) and then |
| 175 | * transition to low and the MCS_STFIR and MCS_MODE1 bits must |
| 176 | * be low. |
| 177 | */ |
| 178 | rval |= (MCS_MODE0 | MCS_XCVR_CONF); |
| 179 | rval &= ~MCS_STFIR; |
| 180 | rval &= ~MCS_MODE1; |
| 181 | ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval); |
| 182 | if (unlikely(ret)) |
| 183 | goto error; |
| 184 | |
| 185 | rval &= ~MCS_MODE0; |
| 186 | ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval); |
| 187 | if (unlikely(ret)) |
| 188 | goto error; |
| 189 | |
| 190 | rval &= ~MCS_XCVR_CONF; |
| 191 | ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval); |
| 192 | if (unlikely(ret)) |
| 193 | goto error; |
| 194 | |
| 195 | ret = 0; |
| 196 | error: |
| 197 | return ret; |
| 198 | } |
| 199 | |
| 200 | /* Setup a communication between mcs7780 and agilent chip. */ |
| 201 | static inline int mcs_setup_transceiver_agilent(struct mcs_cb *mcs) |
| 202 | { |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 203 | IRDA_WARNING("This transceiver type is not supported yet.\n"); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 204 | return 1; |
| 205 | } |
| 206 | |
| 207 | /* Setup a communication between mcs7780 and sharp chip. */ |
| 208 | static inline int mcs_setup_transceiver_sharp(struct mcs_cb *mcs) |
| 209 | { |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 210 | IRDA_WARNING("This transceiver type is not supported yet.\n"); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 211 | return 1; |
| 212 | } |
| 213 | |
| 214 | /* Common setup for all transceivers */ |
| 215 | static inline int mcs_setup_transceiver(struct mcs_cb *mcs) |
| 216 | { |
| 217 | int ret = 0; |
| 218 | __u16 rval; |
| 219 | char *msg; |
| 220 | |
| 221 | msg = "Basic transceiver setup error."; |
| 222 | |
| 223 | /* read value of MODE Register, set the DRIVER and RESET bits |
| 224 | * and write value back out to MODE Register |
| 225 | */ |
| 226 | ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval); |
| 227 | if(unlikely(ret != 2)) |
| 228 | goto error; |
| 229 | rval |= MCS_DRIVER; /* put the mcs7780 into configuration mode. */ |
| 230 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); |
| 231 | if(unlikely(ret)) |
| 232 | goto error; |
| 233 | |
| 234 | rval = 0; /* set min pulse width to 0 initially. */ |
| 235 | ret = mcs_set_reg(mcs, MCS_MINRXPW_REG, rval); |
| 236 | if(unlikely(ret)) |
| 237 | goto error; |
| 238 | |
| 239 | ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval); |
| 240 | if(unlikely(ret != 2)) |
| 241 | goto error; |
| 242 | |
| 243 | rval &= ~MCS_FIR; /* turn off fir mode. */ |
| 244 | if(mcs->sir_tweak) |
| 245 | rval |= MCS_SIR16US; /* 1.6us pulse width */ |
| 246 | else |
| 247 | rval &= ~MCS_SIR16US; /* 3/16 bit time pulse width */ |
| 248 | |
| 249 | /* make sure ask mode and back to back packets are off. */ |
| 250 | rval &= ~(MCS_BBTG | MCS_ASK); |
| 251 | |
| 252 | rval &= ~MCS_SPEED_MASK; |
| 253 | rval |= MCS_SPEED_9600; /* make sure initial speed is 9600. */ |
| 254 | mcs->speed = 9600; |
| 255 | mcs->new_speed = 0; /* new_speed is set to 0 */ |
| 256 | rval &= ~MCS_PLLPWDN; /* disable power down. */ |
| 257 | |
| 258 | /* make sure device determines direction and that the auto send sip |
| 259 | * pulse are on. |
| 260 | */ |
| 261 | rval |= MCS_DTD | MCS_SIPEN; |
| 262 | |
| 263 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); |
| 264 | if(unlikely(ret)) |
| 265 | goto error; |
| 266 | |
| 267 | msg = "transceiver model specific setup error."; |
| 268 | switch (mcs->transceiver_type) { |
| 269 | case MCS_TSC_VISHAY: |
| 270 | ret = mcs_setup_transceiver_vishay(mcs); |
| 271 | break; |
| 272 | |
| 273 | case MCS_TSC_SHARP: |
| 274 | ret = mcs_setup_transceiver_sharp(mcs); |
| 275 | break; |
| 276 | |
| 277 | case MCS_TSC_AGILENT: |
| 278 | ret = mcs_setup_transceiver_agilent(mcs); |
| 279 | break; |
| 280 | |
| 281 | default: |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 282 | IRDA_WARNING("Unknown transceiver type: %d\n", |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 283 | mcs->transceiver_type); |
| 284 | ret = 1; |
| 285 | } |
| 286 | if (unlikely(ret)) |
| 287 | goto error; |
| 288 | |
| 289 | /* If transceiver is not SHARP, then if receive mode set |
| 290 | * on the RXFAST bit in the XCVR Register otherwise unset it |
| 291 | */ |
| 292 | if (mcs->transceiver_type != MCS_TSC_SHARP) { |
| 293 | |
| 294 | ret = mcs_get_reg(mcs, MCS_XCVR_REG, &rval); |
| 295 | if (unlikely(ret != 2)) |
| 296 | goto error; |
| 297 | if (mcs->receive_mode) |
| 298 | rval |= MCS_RXFAST; |
| 299 | else |
| 300 | rval &= ~MCS_RXFAST; |
| 301 | ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval); |
| 302 | if (unlikely(ret)) |
| 303 | goto error; |
| 304 | } |
| 305 | |
| 306 | msg = "transceiver reset."; |
| 307 | |
| 308 | ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval); |
| 309 | if (unlikely(ret != 2)) |
| 310 | goto error; |
| 311 | |
| 312 | /* reset the mcs7780 so all changes take effect. */ |
| 313 | rval &= ~MCS_RESET; |
| 314 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); |
| 315 | if (unlikely(ret)) |
| 316 | goto error; |
| 317 | else |
| 318 | return ret; |
| 319 | |
| 320 | error: |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 321 | IRDA_ERROR("%s\n", msg); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 322 | return ret; |
| 323 | } |
| 324 | |
| 325 | /* Wraps the data in format for SIR */ |
| 326 | static inline int mcs_wrap_sir_skb(struct sk_buff *skb, __u8 * buf) |
| 327 | { |
| 328 | int wraplen; |
| 329 | |
| 330 | /* 2: full frame length, including "the length" */ |
| 331 | wraplen = async_wrap_skb(skb, buf + 2, 4094); |
| 332 | |
| 333 | wraplen += 2; |
| 334 | buf[0] = wraplen & 0xff; |
| 335 | buf[1] = (wraplen >> 8) & 0xff; |
| 336 | |
| 337 | return wraplen; |
| 338 | } |
| 339 | |
| 340 | /* Wraps the data in format for FIR */ |
| 341 | static unsigned mcs_wrap_fir_skb(const struct sk_buff *skb, __u8 *buf) |
| 342 | { |
| 343 | unsigned int len = 0; |
| 344 | __u32 fcs = ~(crc32_le(~0, skb->data, skb->len)); |
| 345 | |
| 346 | /* add 2 bytes for length value and 4 bytes for fcs. */ |
| 347 | len = skb->len + 6; |
| 348 | |
| 349 | /* The mcs7780 requires that the first two bytes are the packet |
| 350 | * length in little endian order. Note: the length value includes |
| 351 | * the two bytes for the length value itself. |
| 352 | */ |
| 353 | buf[0] = len & 0xff; |
| 354 | buf[1] = (len >> 8) & 0xff; |
| 355 | /* copy the data into the tx buffer. */ |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 356 | skb_copy_from_linear_data(skb, buf + 2, skb->len); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 357 | /* put the fcs in the last four bytes in little endian order. */ |
| 358 | buf[len - 4] = fcs & 0xff; |
| 359 | buf[len - 3] = (fcs >> 8) & 0xff; |
| 360 | buf[len - 2] = (fcs >> 16) & 0xff; |
| 361 | buf[len - 1] = (fcs >> 24) & 0xff; |
| 362 | |
| 363 | return len; |
| 364 | } |
| 365 | |
| 366 | /* Wraps the data in format for MIR */ |
| 367 | static unsigned mcs_wrap_mir_skb(const struct sk_buff *skb, __u8 *buf) |
| 368 | { |
| 369 | __u16 fcs = 0; |
| 370 | int len = skb->len + 4; |
| 371 | |
| 372 | fcs = ~(irda_calc_crc16(~fcs, skb->data, skb->len)); |
| 373 | /* put the total packet length in first. Note: packet length |
| 374 | * value includes the two bytes that hold the packet length |
| 375 | * itself. |
| 376 | */ |
| 377 | buf[0] = len & 0xff; |
| 378 | buf[1] = (len >> 8) & 0xff; |
| 379 | /* copy the data */ |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 380 | skb_copy_from_linear_data(skb, buf + 2, skb->len); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 381 | /* put the fcs in last two bytes in little endian order. */ |
| 382 | buf[len - 2] = fcs & 0xff; |
| 383 | buf[len - 1] = (fcs >> 8) & 0xff; |
| 384 | |
| 385 | return len; |
| 386 | } |
| 387 | |
| 388 | /* Unwrap received packets at MIR speed. A 16 bit crc_ccitt checksum is |
| 389 | * used for the fcs. When performed over the entire packet the result |
| 390 | * should be GOOD_FCS = 0xf0b8. Hands the unwrapped data off to the IrDA |
| 391 | * layer via a sk_buff. |
| 392 | */ |
| 393 | static void mcs_unwrap_mir(struct mcs_cb *mcs, __u8 *buf, int len) |
| 394 | { |
| 395 | __u16 fcs; |
| 396 | int new_len; |
| 397 | struct sk_buff *skb; |
| 398 | |
| 399 | /* Assume that the frames are going to fill a single packet |
| 400 | * rather than span multiple packets. |
| 401 | */ |
| 402 | |
| 403 | new_len = len - 2; |
| 404 | if(unlikely(new_len <= 0)) { |
| 405 | IRDA_ERROR("%s short frame length %d\n", |
| 406 | mcs->netdev->name, new_len); |
| 407 | ++mcs->stats.rx_errors; |
| 408 | ++mcs->stats.rx_length_errors; |
| 409 | return; |
| 410 | } |
| 411 | fcs = 0; |
| 412 | fcs = irda_calc_crc16(~fcs, buf, len); |
| 413 | |
| 414 | if(fcs != GOOD_FCS) { |
| 415 | IRDA_ERROR("crc error calc 0x%x len %d\n", |
| 416 | fcs, new_len); |
| 417 | mcs->stats.rx_errors++; |
| 418 | mcs->stats.rx_crc_errors++; |
| 419 | return; |
| 420 | } |
| 421 | |
| 422 | skb = dev_alloc_skb(new_len + 1); |
| 423 | if(unlikely(!skb)) { |
| 424 | ++mcs->stats.rx_dropped; |
| 425 | return; |
| 426 | } |
| 427 | |
| 428 | skb_reserve(skb, 1); |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 429 | skb_copy_to_linear_data(skb, buf, new_len); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 430 | skb_put(skb, new_len); |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 431 | skb_reset_mac_header(skb); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 432 | skb->protocol = htons(ETH_P_IRDA); |
| 433 | skb->dev = mcs->netdev; |
| 434 | |
| 435 | netif_rx(skb); |
| 436 | |
| 437 | mcs->stats.rx_packets++; |
| 438 | mcs->stats.rx_bytes += new_len; |
| 439 | |
| 440 | return; |
| 441 | } |
| 442 | |
| 443 | /* Unwrap received packets at FIR speed. A 32 bit crc_ccitt checksum is |
| 444 | * used for the fcs. Hands the unwrapped data off to the IrDA |
| 445 | * layer via a sk_buff. |
| 446 | */ |
| 447 | static void mcs_unwrap_fir(struct mcs_cb *mcs, __u8 *buf, int len) |
| 448 | { |
| 449 | __u32 fcs; |
| 450 | int new_len; |
| 451 | struct sk_buff *skb; |
| 452 | |
| 453 | /* Assume that the frames are going to fill a single packet |
| 454 | * rather than span multiple packets. This is most likely a false |
| 455 | * assumption. |
| 456 | */ |
| 457 | |
| 458 | new_len = len - 4; |
| 459 | if(unlikely(new_len <= 0)) { |
| 460 | IRDA_ERROR("%s short frame length %d\n", |
| 461 | mcs->netdev->name, new_len); |
| 462 | ++mcs->stats.rx_errors; |
| 463 | ++mcs->stats.rx_length_errors; |
| 464 | return; |
| 465 | } |
| 466 | |
| 467 | fcs = ~(crc32_le(~0, buf, new_len)); |
| 468 | if(fcs != le32_to_cpu(get_unaligned((u32 *)(buf+new_len)))) { |
| 469 | IRDA_ERROR("crc error calc 0x%x len %d\n", fcs, new_len); |
| 470 | mcs->stats.rx_errors++; |
| 471 | mcs->stats.rx_crc_errors++; |
| 472 | return; |
| 473 | } |
| 474 | |
| 475 | skb = dev_alloc_skb(new_len + 1); |
| 476 | if(unlikely(!skb)) { |
| 477 | ++mcs->stats.rx_dropped; |
| 478 | return; |
| 479 | } |
| 480 | |
| 481 | skb_reserve(skb, 1); |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 482 | skb_copy_to_linear_data(skb, buf, new_len); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 483 | skb_put(skb, new_len); |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 484 | skb_reset_mac_header(skb); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 485 | skb->protocol = htons(ETH_P_IRDA); |
| 486 | skb->dev = mcs->netdev; |
| 487 | |
| 488 | netif_rx(skb); |
| 489 | |
| 490 | mcs->stats.rx_packets++; |
| 491 | mcs->stats.rx_bytes += new_len; |
| 492 | |
| 493 | return; |
| 494 | } |
| 495 | |
| 496 | |
| 497 | /* Allocates urbs for both receive and transmit. |
| 498 | * If alloc fails return error code 0 (fail) otherwise |
| 499 | * return error code 1 (success). |
| 500 | */ |
| 501 | static inline int mcs_setup_urbs(struct mcs_cb *mcs) |
| 502 | { |
| 503 | mcs->rx_urb = NULL; |
| 504 | |
| 505 | mcs->tx_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 506 | if (!mcs->tx_urb) |
| 507 | return 0; |
| 508 | |
| 509 | mcs->rx_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 510 | if (!mcs->rx_urb) |
| 511 | return 0; |
| 512 | |
| 513 | return 1; |
| 514 | } |
| 515 | |
| 516 | /* Sets up state to be initially outside frame, gets receive urb, |
| 517 | * sets status to successful and then submits the urb to start |
| 518 | * receiving the data. |
| 519 | */ |
| 520 | static inline int mcs_receive_start(struct mcs_cb *mcs) |
| 521 | { |
| 522 | mcs->rx_buff.in_frame = FALSE; |
| 523 | mcs->rx_buff.state = OUTSIDE_FRAME; |
| 524 | |
| 525 | usb_fill_bulk_urb(mcs->rx_urb, mcs->usbdev, |
| 526 | usb_rcvbulkpipe(mcs->usbdev, mcs->ep_in), |
| 527 | mcs->in_buf, 4096, mcs_receive_irq, mcs); |
| 528 | |
| 529 | mcs->rx_urb->status = 0; |
| 530 | return usb_submit_urb(mcs->rx_urb, GFP_KERNEL); |
| 531 | } |
| 532 | |
| 533 | /* Finds the in and out endpoints for the mcs control block */ |
| 534 | static inline int mcs_find_endpoints(struct mcs_cb *mcs, |
| 535 | struct usb_host_endpoint *ep, int epnum) |
| 536 | { |
| 537 | int i; |
| 538 | int ret = 0; |
| 539 | |
| 540 | /* If no place to store the endpoints just return */ |
| 541 | if (!ep) |
| 542 | return ret; |
| 543 | |
| 544 | /* cycle through all endpoints, find the first two that are DIR_IN */ |
| 545 | for (i = 0; i < epnum; i++) { |
| 546 | if (ep[i].desc.bEndpointAddress & USB_DIR_IN) |
| 547 | mcs->ep_in = ep[i].desc.bEndpointAddress; |
| 548 | else |
| 549 | mcs->ep_out = ep[i].desc.bEndpointAddress; |
| 550 | |
| 551 | /* MosChip says that the chip has only two bulk |
| 552 | * endpoints. Find one for each direction and move on. |
| 553 | */ |
| 554 | if ((mcs->ep_in != 0) && (mcs->ep_out != 0)) { |
| 555 | ret = 1; |
| 556 | break; |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | return ret; |
| 561 | } |
| 562 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 563 | static void mcs_speed_work(struct work_struct *work) |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 564 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 565 | struct mcs_cb *mcs = container_of(work, struct mcs_cb, work); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 566 | struct net_device *netdev = mcs->netdev; |
| 567 | |
| 568 | mcs_speed_change(mcs); |
| 569 | netif_wake_queue(netdev); |
| 570 | } |
| 571 | |
| 572 | /* Function to change the speed of the mcs7780. Fully supports SIR, |
| 573 | * MIR, and FIR speeds. |
| 574 | */ |
| 575 | static int mcs_speed_change(struct mcs_cb *mcs) |
| 576 | { |
| 577 | int ret = 0; |
| 578 | int rst = 0; |
| 579 | int cnt = 0; |
| 580 | __u16 nspeed; |
| 581 | __u16 rval; |
| 582 | |
| 583 | nspeed = mcs_speed_set[(mcs->new_speed >> 8) & 0x0f]; |
| 584 | |
| 585 | do { |
| 586 | mcs_get_reg(mcs, MCS_RESV_REG, &rval); |
| 587 | } while(cnt++ < 100 && (rval & MCS_IRINTX)); |
| 588 | |
| 589 | if(cnt >= 100) { |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 590 | IRDA_ERROR("unable to change speed\n"); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 591 | ret = -EIO; |
| 592 | goto error; |
| 593 | } |
| 594 | |
| 595 | mcs_get_reg(mcs, MCS_MODE_REG, &rval); |
| 596 | |
| 597 | /* MINRXPW values recomended by MosChip */ |
| 598 | if (mcs->new_speed <= 115200) { |
| 599 | rval &= ~MCS_FIR; |
| 600 | |
| 601 | if ((rst = (mcs->speed > 115200))) |
| 602 | mcs_set_reg(mcs, MCS_MINRXPW_REG, 0); |
| 603 | |
| 604 | } else if (mcs->new_speed <= 1152000) { |
| 605 | rval &= ~MCS_FIR; |
| 606 | |
| 607 | if ((rst = !(mcs->speed == 576000 || mcs->speed == 1152000))) |
| 608 | mcs_set_reg(mcs, MCS_MINRXPW_REG, 5); |
| 609 | |
| 610 | } else { |
| 611 | rval |= MCS_FIR; |
| 612 | |
| 613 | if ((rst = (mcs->speed != 4000000))) |
| 614 | mcs_set_reg(mcs, MCS_MINRXPW_REG, 5); |
| 615 | |
| 616 | } |
| 617 | |
| 618 | rval &= ~MCS_SPEED_MASK; |
| 619 | rval |= nspeed; |
| 620 | |
| 621 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); |
| 622 | if (unlikely(ret)) |
| 623 | goto error; |
| 624 | |
| 625 | if (rst) |
| 626 | switch (mcs->transceiver_type) { |
| 627 | case MCS_TSC_VISHAY: |
| 628 | ret = mcs_setup_transceiver_vishay(mcs); |
| 629 | break; |
| 630 | |
| 631 | case MCS_TSC_SHARP: |
| 632 | ret = mcs_setup_transceiver_sharp(mcs); |
| 633 | break; |
| 634 | |
| 635 | case MCS_TSC_AGILENT: |
| 636 | ret = mcs_setup_transceiver_agilent(mcs); |
| 637 | break; |
| 638 | |
| 639 | default: |
| 640 | ret = 1; |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 641 | IRDA_WARNING("Unknown transceiver type: %d\n", |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 642 | mcs->transceiver_type); |
| 643 | } |
| 644 | if (unlikely(ret)) |
| 645 | goto error; |
| 646 | |
| 647 | mcs_get_reg(mcs, MCS_MODE_REG, &rval); |
| 648 | rval &= ~MCS_RESET; |
| 649 | ret = mcs_set_reg(mcs, MCS_MODE_REG, rval); |
| 650 | |
| 651 | mcs->speed = mcs->new_speed; |
| 652 | error: |
| 653 | mcs->new_speed = 0; |
| 654 | return ret; |
| 655 | } |
| 656 | |
| 657 | /* Ioctl calls not supported at this time. Can be an area of future work. */ |
| 658 | static int mcs_net_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) |
| 659 | { |
| 660 | /* struct if_irda_req *irq = (struct if_irda_req *)rq; */ |
| 661 | /* struct mcs_cb *mcs = netdev_priv(netdev); */ |
| 662 | int ret = 0; |
| 663 | |
| 664 | switch (cmd) { |
| 665 | default: |
| 666 | ret = -EOPNOTSUPP; |
| 667 | } |
| 668 | |
| 669 | return ret; |
| 670 | } |
| 671 | |
| 672 | /* Network device is taken down, done by "ifconfig irda0 down" */ |
| 673 | static int mcs_net_close(struct net_device *netdev) |
| 674 | { |
| 675 | int ret = 0; |
| 676 | struct mcs_cb *mcs = netdev_priv(netdev); |
| 677 | |
| 678 | /* Stop transmit processing */ |
| 679 | netif_stop_queue(netdev); |
| 680 | |
| 681 | /* kill and free the receive and transmit URBs */ |
| 682 | usb_kill_urb(mcs->rx_urb); |
| 683 | usb_free_urb(mcs->rx_urb); |
| 684 | usb_kill_urb(mcs->tx_urb); |
| 685 | usb_free_urb(mcs->tx_urb); |
| 686 | |
| 687 | /* Stop and remove instance of IrLAP */ |
| 688 | if (mcs->irlap) |
| 689 | irlap_close(mcs->irlap); |
| 690 | |
| 691 | mcs->irlap = NULL; |
| 692 | return ret; |
| 693 | } |
| 694 | |
| 695 | /* Network device is taken up, done by "ifconfig irda0 up" */ |
| 696 | static int mcs_net_open(struct net_device *netdev) |
| 697 | { |
| 698 | struct mcs_cb *mcs = netdev_priv(netdev); |
| 699 | char hwname[16]; |
| 700 | int ret = 0; |
| 701 | |
| 702 | ret = usb_clear_halt(mcs->usbdev, |
| 703 | usb_sndbulkpipe(mcs->usbdev, mcs->ep_in)); |
| 704 | if (ret) |
| 705 | goto error1; |
| 706 | ret = usb_clear_halt(mcs->usbdev, |
| 707 | usb_rcvbulkpipe(mcs->usbdev, mcs->ep_out)); |
| 708 | if (ret) |
| 709 | goto error1; |
| 710 | |
| 711 | ret = mcs_setup_transceiver(mcs); |
| 712 | if (ret) |
| 713 | goto error1; |
| 714 | |
| 715 | ret = -ENOMEM; |
| 716 | |
| 717 | /* Initialize for SIR/FIR to copy data directly into skb. */ |
| 718 | mcs->receiving = 0; |
| 719 | mcs->rx_buff.truesize = IRDA_SKB_MAX_MTU; |
| 720 | mcs->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); |
| 721 | if (!mcs->rx_buff.skb) |
| 722 | goto error1; |
| 723 | |
| 724 | skb_reserve(mcs->rx_buff.skb, 1); |
| 725 | mcs->rx_buff.head = mcs->rx_buff.skb->data; |
| 726 | do_gettimeofday(&mcs->rx_time); |
| 727 | |
| 728 | /* |
| 729 | * Now that everything should be initialized properly, |
| 730 | * Open new IrLAP layer instance to take care of us... |
| 731 | * Note : will send immediately a speed change... |
| 732 | */ |
| 733 | sprintf(hwname, "usb#%d", mcs->usbdev->devnum); |
| 734 | mcs->irlap = irlap_open(netdev, &mcs->qos, hwname); |
| 735 | if (!mcs->irlap) { |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 736 | IRDA_ERROR("mcs7780: irlap_open failed\n"); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 737 | goto error2; |
| 738 | } |
| 739 | |
| 740 | if (!mcs_setup_urbs(mcs)) |
| 741 | goto error3; |
| 742 | |
| 743 | ret = mcs_receive_start(mcs); |
| 744 | if (ret) |
| 745 | goto error3; |
| 746 | |
| 747 | netif_start_queue(netdev); |
| 748 | return 0; |
| 749 | |
| 750 | error3: |
| 751 | irlap_close(mcs->irlap); |
| 752 | error2: |
| 753 | kfree_skb(mcs->rx_buff.skb); |
| 754 | error1: |
| 755 | return ret; |
| 756 | } |
| 757 | |
| 758 | |
| 759 | /* Get device stats for /proc/net/dev and ifconfig */ |
| 760 | static struct net_device_stats *mcs_net_get_stats(struct net_device *netdev) |
| 761 | { |
| 762 | struct mcs_cb *mcs = netdev_priv(netdev); |
| 763 | return &mcs->stats; |
| 764 | } |
| 765 | |
| 766 | /* Receive callback function. */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 767 | static void mcs_receive_irq(struct urb *urb) |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 768 | { |
| 769 | __u8 *bytes; |
| 770 | struct mcs_cb *mcs = urb->context; |
| 771 | int i; |
| 772 | int ret; |
| 773 | |
| 774 | if (!netif_running(mcs->netdev)) |
| 775 | return; |
| 776 | |
| 777 | if (urb->status) |
| 778 | return; |
| 779 | |
| 780 | if (urb->actual_length > 0) { |
| 781 | bytes = urb->transfer_buffer; |
| 782 | |
| 783 | /* MCS returns frames without BOF and EOF |
| 784 | * I assume it returns whole frames. |
| 785 | */ |
| 786 | /* SIR speed */ |
| 787 | if(mcs->speed < 576000) { |
| 788 | async_unwrap_char(mcs->netdev, &mcs->stats, |
| 789 | &mcs->rx_buff, 0xc0); |
| 790 | |
| 791 | for (i = 0; i < urb->actual_length; i++) |
| 792 | async_unwrap_char(mcs->netdev, &mcs->stats, |
| 793 | &mcs->rx_buff, bytes[i]); |
| 794 | |
| 795 | async_unwrap_char(mcs->netdev, &mcs->stats, |
| 796 | &mcs->rx_buff, 0xc1); |
| 797 | } |
| 798 | /* MIR speed */ |
| 799 | else if(mcs->speed == 576000 || mcs->speed == 1152000) { |
| 800 | mcs_unwrap_mir(mcs, urb->transfer_buffer, |
| 801 | urb->actual_length); |
| 802 | } |
| 803 | /* FIR speed */ |
| 804 | else { |
| 805 | mcs_unwrap_fir(mcs, urb->transfer_buffer, |
| 806 | urb->actual_length); |
| 807 | } |
| 808 | mcs->netdev->last_rx = jiffies; |
| 809 | do_gettimeofday(&mcs->rx_time); |
| 810 | } |
| 811 | |
| 812 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
| 813 | } |
| 814 | |
| 815 | /* Transmit callback funtion. */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 816 | static void mcs_send_irq(struct urb *urb) |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 817 | { |
| 818 | struct mcs_cb *mcs = urb->context; |
| 819 | struct net_device *ndev = mcs->netdev; |
| 820 | |
| 821 | if (unlikely(mcs->new_speed)) |
| 822 | schedule_work(&mcs->work); |
| 823 | else |
| 824 | netif_wake_queue(ndev); |
| 825 | } |
| 826 | |
| 827 | /* Transmit callback funtion. */ |
| 828 | static int mcs_hard_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 829 | { |
| 830 | unsigned long flags; |
| 831 | struct mcs_cb *mcs; |
| 832 | int wraplen; |
| 833 | int ret = 0; |
| 834 | |
| 835 | |
| 836 | if (skb == NULL || ndev == NULL) |
| 837 | return -EINVAL; |
| 838 | |
| 839 | netif_stop_queue(ndev); |
| 840 | mcs = netdev_priv(ndev); |
| 841 | |
| 842 | spin_lock_irqsave(&mcs->lock, flags); |
| 843 | |
| 844 | mcs->new_speed = irda_get_next_speed(skb); |
| 845 | if (likely(mcs->new_speed == mcs->speed)) |
| 846 | mcs->new_speed = 0; |
| 847 | |
| 848 | /* SIR speed */ |
| 849 | if(mcs->speed < 576000) { |
| 850 | wraplen = mcs_wrap_sir_skb(skb, mcs->out_buf); |
| 851 | } |
| 852 | /* MIR speed */ |
| 853 | else if(mcs->speed == 576000 || mcs->speed == 1152000) { |
| 854 | wraplen = mcs_wrap_mir_skb(skb, mcs->out_buf); |
| 855 | } |
| 856 | /* FIR speed */ |
| 857 | else { |
| 858 | wraplen = mcs_wrap_fir_skb(skb, mcs->out_buf); |
| 859 | } |
| 860 | usb_fill_bulk_urb(mcs->tx_urb, mcs->usbdev, |
| 861 | usb_sndbulkpipe(mcs->usbdev, mcs->ep_out), |
| 862 | mcs->out_buf, wraplen, mcs_send_irq, mcs); |
| 863 | |
| 864 | if ((ret = usb_submit_urb(mcs->tx_urb, GFP_ATOMIC))) { |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 865 | IRDA_ERROR("failed tx_urb: %d\n", ret); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 866 | switch (ret) { |
| 867 | case -ENODEV: |
| 868 | case -EPIPE: |
| 869 | break; |
| 870 | default: |
| 871 | mcs->stats.tx_errors++; |
| 872 | netif_start_queue(ndev); |
| 873 | } |
| 874 | } else { |
| 875 | mcs->stats.tx_packets++; |
| 876 | mcs->stats.tx_bytes += skb->len; |
| 877 | } |
| 878 | |
| 879 | dev_kfree_skb(skb); |
| 880 | spin_unlock_irqrestore(&mcs->lock, flags); |
| 881 | return ret; |
| 882 | } |
| 883 | |
| 884 | /* |
| 885 | * This function is called by the USB subsystem for each new device in the |
| 886 | * system. Need to verify the device and if it is, then start handling it. |
| 887 | */ |
| 888 | static int mcs_probe(struct usb_interface *intf, |
| 889 | const struct usb_device_id *id) |
| 890 | { |
| 891 | struct usb_device *udev = interface_to_usbdev(intf); |
| 892 | struct net_device *ndev = NULL; |
| 893 | struct mcs_cb *mcs; |
| 894 | int ret = -ENOMEM; |
| 895 | |
| 896 | ndev = alloc_irdadev(sizeof(*mcs)); |
| 897 | if (!ndev) |
| 898 | goto error1; |
| 899 | |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 900 | IRDA_DEBUG(1, "MCS7780 USB-IrDA bridge found at %d.\n", udev->devnum); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 901 | |
| 902 | /* what is it realy for? */ |
| 903 | SET_MODULE_OWNER(ndev); |
| 904 | SET_NETDEV_DEV(ndev, &intf->dev); |
| 905 | |
| 906 | ret = usb_reset_configuration(udev); |
| 907 | if (ret != 0) { |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 908 | IRDA_ERROR("mcs7780: usb reset configuration failed\n"); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 909 | goto error2; |
| 910 | } |
| 911 | |
| 912 | mcs = netdev_priv(ndev); |
| 913 | mcs->usbdev = udev; |
| 914 | mcs->netdev = ndev; |
| 915 | spin_lock_init(&mcs->lock); |
| 916 | |
| 917 | /* Initialize QoS for this device */ |
| 918 | irda_init_max_qos_capabilies(&mcs->qos); |
| 919 | |
| 920 | /* That's the Rx capability. */ |
| 921 | mcs->qos.baud_rate.bits &= |
| 922 | IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
| 923 | | IR_576000 | IR_1152000 | (IR_4000000 << 8); |
| 924 | |
| 925 | |
| 926 | mcs->qos.min_turn_time.bits &= qos_mtt_bits; |
| 927 | irda_qos_bits_to_value(&mcs->qos); |
| 928 | |
| 929 | /* Speed change work initialisation*/ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 930 | INIT_WORK(&mcs->work, mcs_speed_work); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 931 | |
| 932 | /* Override the network functions we need to use */ |
| 933 | ndev->hard_start_xmit = mcs_hard_xmit; |
| 934 | ndev->open = mcs_net_open; |
| 935 | ndev->stop = mcs_net_close; |
| 936 | ndev->get_stats = mcs_net_get_stats; |
| 937 | ndev->do_ioctl = mcs_net_ioctl; |
| 938 | |
| 939 | if (!intf->cur_altsetting) |
| 940 | goto error2; |
| 941 | |
| 942 | ret = mcs_find_endpoints(mcs, intf->cur_altsetting->endpoint, |
| 943 | intf->cur_altsetting->desc.bNumEndpoints); |
| 944 | if (!ret) { |
| 945 | ret = -ENODEV; |
| 946 | goto error2; |
| 947 | } |
| 948 | |
| 949 | ret = register_netdev(ndev); |
| 950 | if (ret != 0) |
| 951 | goto error2; |
| 952 | |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 953 | IRDA_DEBUG(1, "IrDA: Registered MosChip MCS7780 device as %s\n", |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 954 | ndev->name); |
| 955 | |
| 956 | mcs->transceiver_type = transceiver_type; |
| 957 | mcs->sir_tweak = sir_tweak; |
| 958 | mcs->receive_mode = receive_mode; |
| 959 | |
| 960 | usb_set_intfdata(intf, mcs); |
| 961 | return 0; |
| 962 | |
| 963 | error2: |
| 964 | free_netdev(ndev); |
| 965 | |
| 966 | error1: |
| 967 | return ret; |
| 968 | } |
| 969 | |
| 970 | /* The current device is removed, the USB layer tells us to shut down. */ |
| 971 | static void mcs_disconnect(struct usb_interface *intf) |
| 972 | { |
| 973 | struct mcs_cb *mcs = usb_get_intfdata(intf); |
| 974 | |
| 975 | if (!mcs) |
| 976 | return; |
| 977 | |
| 978 | flush_scheduled_work(); |
| 979 | |
| 980 | unregister_netdev(mcs->netdev); |
| 981 | free_netdev(mcs->netdev); |
| 982 | |
| 983 | usb_set_intfdata(intf, NULL); |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 984 | IRDA_DEBUG(0, "MCS7780 now disconnected.\n"); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 985 | } |
| 986 | |
| 987 | /* Module insertion */ |
| 988 | static int __init mcs_init(void) |
| 989 | { |
| 990 | int result; |
| 991 | |
| 992 | /* register this driver with the USB subsystem */ |
| 993 | result = usb_register(&mcs_driver); |
| 994 | if (result) |
Samuel Ortiz | 599b1fa | 2007-04-20 22:12:07 -0700 | [diff] [blame] | 995 | IRDA_ERROR("usb_register failed. Error number %d\n", result); |
Samuel Ortiz | c6ae522 | 2006-05-25 16:19:22 -0700 | [diff] [blame] | 996 | |
| 997 | return result; |
| 998 | } |
| 999 | module_init(mcs_init); |
| 1000 | |
| 1001 | /* Module removal */ |
| 1002 | static void __exit mcs_exit(void) |
| 1003 | { |
| 1004 | /* deregister this driver with the USB subsystem */ |
| 1005 | usb_deregister(&mcs_driver); |
| 1006 | } |
| 1007 | module_exit(mcs_exit); |
| 1008 | |