Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. |
| 3 | * |
| 4 | * This software is licensed under the terms of the GNU General Public |
| 5 | * License version 2, as published by the Free Software Foundation, and |
| 6 | * may be copied, distributed, and modified under those terms. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 15 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 16 | #include <linux/module.h> |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 17 | #include <linux/kernel.h> |
| 18 | #include <linux/usb.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/kthread.h> |
| 21 | #include <linux/usb/cdc.h> |
| 22 | #include <linux/wait.h> |
| 23 | #include <linux/if_ether.h> |
| 24 | #include <linux/pm_runtime.h> |
| 25 | |
| 26 | #include "gdm_usb.h" |
| 27 | #include "gdm_lte.h" |
| 28 | #include "hci.h" |
| 29 | #include "hci_packet.h" |
| 30 | #include "gdm_endian.h" |
| 31 | |
| 32 | #define USB_DEVICE_CDC_DATA(vid, pid) \ |
| 33 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS,\ |
| 34 | .idVendor = vid,\ |
| 35 | .idProduct = pid,\ |
| 36 | .bInterfaceClass = USB_CLASS_COMM,\ |
| 37 | .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET |
| 38 | |
| 39 | #define USB_DEVICE_MASS_DATA(vid, pid) \ |
| 40 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,\ |
| 41 | .idVendor = vid,\ |
| 42 | .idProduct = pid,\ |
| 43 | .bInterfaceSubClass = USB_SC_SCSI, \ |
| 44 | .bInterfaceClass = USB_CLASS_MASS_STORAGE,\ |
| 45 | .bInterfaceProtocol = USB_PR_BULK |
| 46 | |
| 47 | static const struct usb_device_id id_table[] = { |
| 48 | { USB_DEVICE_CDC_DATA(VID_GCT, PID_GDM7240) }, /* GCT GDM7240 */ |
| 49 | { USB_DEVICE_CDC_DATA(VID_GCT, PID_GDM7243) }, /* GCT GDM7243 */ |
| 50 | { } |
| 51 | }; |
| 52 | |
| 53 | MODULE_DEVICE_TABLE(usb, id_table); |
| 54 | |
| 55 | static struct workqueue_struct *usb_tx_wq; |
| 56 | static struct workqueue_struct *usb_rx_wq; |
| 57 | |
| 58 | static void do_tx(struct work_struct *work); |
| 59 | static void do_rx(struct work_struct *work); |
| 60 | |
| 61 | static int gdm_usb_recv(void *priv_dev, |
| 62 | int (*cb)(void *cb_data, void *data, int len, int context), |
| 63 | void *cb_data, |
| 64 | int context); |
| 65 | |
| 66 | static int request_mac_address(struct lte_udev *udev) |
| 67 | { |
| 68 | u8 buf[16] = {0,}; |
| 69 | struct hci_packet *hci = (struct hci_packet *)buf; |
| 70 | struct usb_device *usbdev = udev->usbdev; |
| 71 | int actual; |
| 72 | int ret = -1; |
| 73 | |
| 74 | hci->cmd_evt = gdm_cpu_to_dev16(&udev->gdm_ed, LTE_GET_INFORMATION); |
| 75 | hci->len = gdm_cpu_to_dev16(&udev->gdm_ed, 1); |
| 76 | hci->data[0] = MAC_ADDRESS; |
| 77 | |
| 78 | ret = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 2), buf, 5, |
| 79 | &actual, 1000); |
| 80 | |
| 81 | udev->request_mac_addr = 1; |
| 82 | |
| 83 | return ret; |
| 84 | } |
| 85 | |
| 86 | static struct usb_tx *alloc_tx_struct(int len) |
| 87 | { |
| 88 | struct usb_tx *t = NULL; |
| 89 | int ret = 0; |
| 90 | |
Teodora Baluta | 1f55864 | 2013-10-23 01:15:26 +0300 | [diff] [blame] | 91 | t = kzalloc(sizeof(struct usb_tx), GFP_ATOMIC); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 92 | if (!t) { |
| 93 | ret = -ENOMEM; |
| 94 | goto out; |
| 95 | } |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 96 | |
| 97 | t->urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 98 | if (!(len % 512)) |
| 99 | len++; |
| 100 | |
| 101 | t->buf = kmalloc(len, GFP_ATOMIC); |
| 102 | if (!t->urb || !t->buf) { |
| 103 | ret = -ENOMEM; |
| 104 | goto out; |
| 105 | } |
| 106 | |
| 107 | out: |
| 108 | if (ret < 0) { |
| 109 | if (t) { |
| 110 | usb_free_urb(t->urb); |
| 111 | kfree(t->buf); |
| 112 | kfree(t); |
| 113 | } |
| 114 | return NULL; |
| 115 | } |
| 116 | |
| 117 | return t; |
| 118 | } |
| 119 | |
| 120 | static struct usb_tx_sdu *alloc_tx_sdu_struct(void) |
| 121 | { |
Dan Carpenter | 75bc5fa | 2014-02-18 15:18:10 +0300 | [diff] [blame^] | 122 | struct usb_tx_sdu *t_sdu; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 123 | |
Teodora Baluta | 1f55864 | 2013-10-23 01:15:26 +0300 | [diff] [blame] | 124 | t_sdu = kzalloc(sizeof(struct usb_tx_sdu), GFP_ATOMIC); |
Dan Carpenter | 75bc5fa | 2014-02-18 15:18:10 +0300 | [diff] [blame^] | 125 | if (!t_sdu) |
| 126 | return NULL; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 127 | |
| 128 | t_sdu->buf = kmalloc(SDU_BUF_SIZE, GFP_ATOMIC); |
| 129 | if (!t_sdu->buf) { |
Dan Carpenter | 75bc5fa | 2014-02-18 15:18:10 +0300 | [diff] [blame^] | 130 | kfree(t_sdu); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 131 | return NULL; |
| 132 | } |
| 133 | |
| 134 | return t_sdu; |
| 135 | } |
| 136 | |
| 137 | static void free_tx_struct(struct usb_tx *t) |
| 138 | { |
| 139 | if (t) { |
| 140 | usb_free_urb(t->urb); |
| 141 | kfree(t->buf); |
| 142 | kfree(t); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | static void free_tx_sdu_struct(struct usb_tx_sdu *t_sdu) |
| 147 | { |
| 148 | if (t_sdu) { |
| 149 | kfree(t_sdu->buf); |
| 150 | kfree(t_sdu); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | static struct usb_tx_sdu *get_tx_sdu_struct(struct tx_cxt *tx, int *no_spc) |
| 155 | { |
| 156 | struct usb_tx_sdu *t_sdu; |
| 157 | |
| 158 | if (list_empty(&tx->free_list)) |
| 159 | return NULL; |
| 160 | |
| 161 | t_sdu = list_entry(tx->free_list.next, struct usb_tx_sdu, list); |
| 162 | list_del(&t_sdu->list); |
| 163 | |
| 164 | tx->avail_count--; |
| 165 | |
| 166 | *no_spc = list_empty(&tx->free_list) ? 1 : 0; |
| 167 | |
| 168 | return t_sdu; |
| 169 | } |
| 170 | |
| 171 | static void put_tx_struct(struct tx_cxt *tx, struct usb_tx_sdu *t_sdu) |
| 172 | { |
| 173 | list_add_tail(&t_sdu->list, &tx->free_list); |
| 174 | tx->avail_count++; |
| 175 | } |
| 176 | |
| 177 | static struct usb_rx *alloc_rx_struct(void) |
| 178 | { |
| 179 | struct usb_rx *r = NULL; |
| 180 | int ret = 0; |
| 181 | |
| 182 | r = kmalloc(sizeof(struct usb_rx), GFP_ATOMIC); |
| 183 | if (!r) { |
| 184 | ret = -ENOMEM; |
| 185 | goto out; |
| 186 | } |
| 187 | |
| 188 | r->urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 189 | r->buf = kmalloc(RX_BUF_SIZE, GFP_ATOMIC); |
| 190 | if (!r->urb || !r->buf) { |
| 191 | ret = -ENOMEM; |
| 192 | goto out; |
| 193 | } |
| 194 | out: |
| 195 | |
| 196 | if (ret < 0) { |
| 197 | if (r) { |
| 198 | usb_free_urb(r->urb); |
| 199 | kfree(r->buf); |
| 200 | kfree(r); |
| 201 | } |
| 202 | return NULL; |
| 203 | } |
| 204 | |
| 205 | return r; |
| 206 | } |
| 207 | |
| 208 | static void free_rx_struct(struct usb_rx *r) |
| 209 | { |
| 210 | if (r) { |
| 211 | usb_free_urb(r->urb); |
| 212 | kfree(r->buf); |
| 213 | kfree(r); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | static struct usb_rx *get_rx_struct(struct rx_cxt *rx, int *no_spc) |
| 218 | { |
| 219 | struct usb_rx *r; |
| 220 | unsigned long flags; |
| 221 | |
| 222 | spin_lock_irqsave(&rx->rx_lock, flags); |
| 223 | |
| 224 | if (list_empty(&rx->free_list)) { |
| 225 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 226 | return NULL; |
| 227 | } |
| 228 | |
| 229 | r = list_entry(rx->free_list.next, struct usb_rx, free_list); |
| 230 | list_del(&r->free_list); |
| 231 | |
| 232 | rx->avail_count--; |
| 233 | |
| 234 | *no_spc = list_empty(&rx->free_list) ? 1 : 0; |
| 235 | |
| 236 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 237 | |
| 238 | return r; |
| 239 | } |
| 240 | |
| 241 | static void put_rx_struct(struct rx_cxt *rx, struct usb_rx *r) |
| 242 | { |
| 243 | unsigned long flags; |
| 244 | |
| 245 | spin_lock_irqsave(&rx->rx_lock, flags); |
| 246 | |
| 247 | list_add_tail(&r->free_list, &rx->free_list); |
| 248 | rx->avail_count++; |
| 249 | |
| 250 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 251 | } |
| 252 | |
| 253 | static void release_usb(struct lte_udev *udev) |
| 254 | { |
| 255 | struct rx_cxt *rx = &udev->rx; |
| 256 | struct tx_cxt *tx = &udev->tx; |
| 257 | struct usb_tx *t, *t_next; |
| 258 | struct usb_rx *r, *r_next; |
| 259 | struct usb_tx_sdu *t_sdu, *t_sdu_next; |
| 260 | unsigned long flags; |
| 261 | |
| 262 | spin_lock_irqsave(&tx->lock, flags); |
| 263 | list_for_each_entry_safe(t_sdu, t_sdu_next, &tx->sdu_list, list) |
| 264 | { |
| 265 | list_del(&t_sdu->list); |
| 266 | free_tx_sdu_struct(t_sdu); |
| 267 | } |
| 268 | |
| 269 | list_for_each_entry_safe(t, t_next, &tx->hci_list, list) |
| 270 | { |
| 271 | list_del(&t->list); |
| 272 | free_tx_struct(t); |
| 273 | } |
| 274 | |
| 275 | list_for_each_entry_safe(t_sdu, t_sdu_next, &tx->free_list, list) |
| 276 | { |
| 277 | list_del(&t_sdu->list); |
| 278 | free_tx_sdu_struct(t_sdu); |
| 279 | } |
| 280 | spin_unlock_irqrestore(&tx->lock, flags); |
| 281 | |
| 282 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 283 | list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, rx_submit_list) |
| 284 | { |
| 285 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 286 | usb_kill_urb(r->urb); |
| 287 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 288 | } |
| 289 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 290 | |
| 291 | spin_lock_irqsave(&rx->rx_lock, flags); |
| 292 | list_for_each_entry_safe(r, r_next, &rx->free_list, free_list) |
| 293 | { |
| 294 | list_del(&r->free_list); |
| 295 | free_rx_struct(r); |
| 296 | } |
| 297 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 298 | |
| 299 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 300 | list_for_each_entry_safe(r, r_next, &rx->to_host_list, to_host_list) |
| 301 | { |
| 302 | if (r->index == (void *)udev) { |
| 303 | list_del(&r->to_host_list); |
| 304 | free_rx_struct(r); |
| 305 | } |
| 306 | } |
| 307 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 308 | } |
| 309 | |
| 310 | static int init_usb(struct lte_udev *udev) |
| 311 | { |
| 312 | int ret = 0; |
| 313 | int i; |
| 314 | struct tx_cxt *tx = &udev->tx; |
| 315 | struct rx_cxt *rx = &udev->rx; |
| 316 | struct usb_tx_sdu *t_sdu = NULL; |
| 317 | struct usb_rx *r = NULL; |
| 318 | |
| 319 | udev->send_complete = 1; |
| 320 | udev->tx_stop = 0; |
| 321 | udev->request_mac_addr = 0; |
| 322 | udev->usb_state = PM_NORMAL; |
| 323 | |
| 324 | INIT_LIST_HEAD(&tx->sdu_list); |
| 325 | INIT_LIST_HEAD(&tx->hci_list); |
| 326 | INIT_LIST_HEAD(&tx->free_list); |
| 327 | INIT_LIST_HEAD(&rx->rx_submit_list); |
| 328 | INIT_LIST_HEAD(&rx->free_list); |
| 329 | INIT_LIST_HEAD(&rx->to_host_list); |
| 330 | spin_lock_init(&tx->lock); |
| 331 | spin_lock_init(&rx->rx_lock); |
| 332 | spin_lock_init(&rx->submit_lock); |
| 333 | spin_lock_init(&rx->to_host_lock); |
| 334 | |
| 335 | tx->avail_count = 0; |
| 336 | rx->avail_count = 0; |
| 337 | |
| 338 | udev->rx_cb = NULL; |
| 339 | |
| 340 | for (i = 0; i < MAX_NUM_SDU_BUF; i++) { |
| 341 | t_sdu = alloc_tx_sdu_struct(); |
| 342 | if (t_sdu == NULL) { |
| 343 | ret = -ENOMEM; |
| 344 | goto fail; |
| 345 | } |
| 346 | |
| 347 | list_add(&t_sdu->list, &tx->free_list); |
| 348 | tx->avail_count++; |
| 349 | } |
| 350 | |
| 351 | for (i = 0; i < MAX_RX_SUBMIT_COUNT*2; i++) { |
| 352 | r = alloc_rx_struct(); |
| 353 | if (r == NULL) { |
| 354 | ret = -ENOMEM; |
| 355 | goto fail; |
| 356 | } |
| 357 | |
| 358 | list_add(&r->free_list, &rx->free_list); |
| 359 | rx->avail_count++; |
| 360 | } |
| 361 | INIT_DELAYED_WORK(&udev->work_tx, do_tx); |
| 362 | INIT_DELAYED_WORK(&udev->work_rx, do_rx); |
| 363 | return 0; |
| 364 | fail: |
| 365 | return ret; |
| 366 | } |
| 367 | |
| 368 | static int set_mac_address(u8 *data, void *arg) |
| 369 | { |
| 370 | struct phy_dev *phy_dev = (struct phy_dev *)arg; |
| 371 | struct lte_udev *udev = phy_dev->priv_dev; |
| 372 | struct tlv *tlv = (struct tlv *)data; |
| 373 | u8 mac_address[ETH_ALEN] = {0, }; |
| 374 | |
| 375 | if (tlv->type == MAC_ADDRESS && udev->request_mac_addr) { |
| 376 | memcpy(mac_address, tlv->data, tlv->len); |
| 377 | |
| 378 | if (register_lte_device(phy_dev, &udev->intf->dev, mac_address) < 0) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 379 | pr_err("register lte device failed\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 380 | |
| 381 | udev->request_mac_addr = 0; |
| 382 | |
| 383 | return 1; |
| 384 | } |
| 385 | |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | static void do_rx(struct work_struct *work) |
| 390 | { |
| 391 | struct lte_udev *udev = container_of(work, struct lte_udev, work_rx.work); |
| 392 | struct rx_cxt *rx = &udev->rx; |
| 393 | struct usb_rx *r; |
| 394 | struct hci_packet *hci; |
| 395 | struct phy_dev *phy_dev; |
| 396 | u16 cmd_evt; |
| 397 | int ret; |
| 398 | unsigned long flags; |
| 399 | |
| 400 | while (1) { |
| 401 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 402 | if (list_empty(&rx->to_host_list)) { |
| 403 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 404 | break; |
| 405 | } |
| 406 | r = list_entry(rx->to_host_list.next, struct usb_rx, to_host_list); |
| 407 | list_del(&r->to_host_list); |
| 408 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 409 | |
| 410 | phy_dev = (struct phy_dev *)r->cb_data; |
| 411 | udev = (struct lte_udev *)phy_dev->priv_dev; |
| 412 | hci = (struct hci_packet *)r->buf; |
| 413 | cmd_evt = gdm_dev16_to_cpu(&udev->gdm_ed, hci->cmd_evt); |
| 414 | |
| 415 | switch (cmd_evt) { |
| 416 | case LTE_GET_INFORMATION_RESULT: |
| 417 | if (set_mac_address(hci->data, r->cb_data) == 0) { |
| 418 | ret = r->callback(r->cb_data, |
| 419 | r->buf, |
| 420 | r->urb->actual_length, |
| 421 | KERNEL_THREAD); |
| 422 | } |
| 423 | break; |
| 424 | |
| 425 | default: |
| 426 | if (r->callback) { |
| 427 | ret = r->callback(r->cb_data, |
| 428 | r->buf, |
| 429 | r->urb->actual_length, |
| 430 | KERNEL_THREAD); |
| 431 | |
| 432 | if (ret == -EAGAIN) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 433 | pr_err("failed to send received data\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 434 | } |
| 435 | break; |
| 436 | } |
| 437 | |
| 438 | put_rx_struct(rx, r); |
| 439 | |
| 440 | gdm_usb_recv(udev, |
| 441 | r->callback, |
| 442 | r->cb_data, |
| 443 | USB_COMPLETE); |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | static void remove_rx_submit_list(struct usb_rx *r, struct rx_cxt *rx) |
| 448 | { |
| 449 | unsigned long flags; |
| 450 | struct usb_rx *r_remove, *r_remove_next; |
| 451 | |
| 452 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 453 | list_for_each_entry_safe(r_remove, r_remove_next, &rx->rx_submit_list, rx_submit_list) |
| 454 | { |
| 455 | if (r == r_remove) { |
| 456 | list_del(&r->rx_submit_list); |
| 457 | break; |
| 458 | } |
| 459 | } |
| 460 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 461 | } |
| 462 | |
| 463 | static void gdm_usb_rcv_complete(struct urb *urb) |
| 464 | { |
| 465 | struct usb_rx *r = urb->context; |
| 466 | struct rx_cxt *rx = r->rx; |
| 467 | unsigned long flags; |
| 468 | struct lte_udev *udev = container_of(r->rx, struct lte_udev, rx); |
| 469 | struct usb_device *usbdev = udev->usbdev; |
| 470 | |
| 471 | remove_rx_submit_list(r, rx); |
| 472 | |
| 473 | if (!urb->status && r->callback) { |
| 474 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 475 | list_add_tail(&r->to_host_list, &rx->to_host_list); |
| 476 | queue_work(usb_rx_wq, &udev->work_rx.work); |
| 477 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 478 | } else { |
| 479 | if (urb->status && udev->usb_state == PM_NORMAL) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 480 | pr_err("%s: urb status error %d\n", |
| 481 | __func__, urb->status); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 482 | |
| 483 | put_rx_struct(rx, r); |
| 484 | } |
| 485 | |
| 486 | usb_mark_last_busy(usbdev); |
| 487 | } |
| 488 | |
| 489 | static int gdm_usb_recv(void *priv_dev, |
| 490 | int (*cb)(void *cb_data, void *data, int len, int context), |
| 491 | void *cb_data, |
| 492 | int context) |
| 493 | { |
| 494 | struct lte_udev *udev = priv_dev; |
| 495 | struct usb_device *usbdev = udev->usbdev; |
| 496 | struct rx_cxt *rx = &udev->rx; |
| 497 | struct usb_rx *r; |
| 498 | int no_spc; |
| 499 | int ret; |
| 500 | unsigned long flags; |
| 501 | |
| 502 | if (!udev->usbdev) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 503 | pr_err("invalid device\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 504 | return -ENODEV; |
| 505 | } |
| 506 | |
| 507 | r = get_rx_struct(rx, &no_spc); |
| 508 | if (!r) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 509 | pr_err("Out of Memory\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 510 | return -ENOMEM; |
| 511 | } |
| 512 | |
| 513 | udev->rx_cb = cb; |
| 514 | r->callback = cb; |
| 515 | r->cb_data = cb_data; |
| 516 | r->index = (void *)udev; |
| 517 | r->rx = rx; |
| 518 | |
| 519 | usb_fill_bulk_urb(r->urb, |
| 520 | usbdev, |
| 521 | usb_rcvbulkpipe(usbdev, 0x83), |
| 522 | r->buf, |
| 523 | RX_BUF_SIZE, |
| 524 | gdm_usb_rcv_complete, |
| 525 | r); |
| 526 | |
| 527 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 528 | list_add_tail(&r->rx_submit_list, &rx->rx_submit_list); |
| 529 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 530 | |
| 531 | if (context == KERNEL_THREAD) |
| 532 | ret = usb_submit_urb(r->urb, GFP_KERNEL); |
| 533 | else |
| 534 | ret = usb_submit_urb(r->urb, GFP_ATOMIC); |
| 535 | |
| 536 | if (ret) { |
| 537 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 538 | list_del(&r->rx_submit_list); |
| 539 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 540 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 541 | pr_err("usb_submit_urb failed (%p)\n", r); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 542 | put_rx_struct(rx, r); |
| 543 | } |
| 544 | |
| 545 | return ret; |
| 546 | } |
| 547 | |
| 548 | static void gdm_usb_send_complete(struct urb *urb) |
| 549 | { |
| 550 | struct usb_tx *t = urb->context; |
| 551 | struct tx_cxt *tx = t->tx; |
| 552 | struct lte_udev *udev = container_of(tx, struct lte_udev, tx); |
| 553 | unsigned long flags; |
| 554 | |
| 555 | if (urb->status == -ECONNRESET) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 556 | pr_info("CONNRESET\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 557 | return; |
| 558 | } |
| 559 | |
| 560 | if (t->callback) |
| 561 | t->callback(t->cb_data); |
| 562 | |
| 563 | free_tx_struct(t); |
| 564 | |
| 565 | spin_lock_irqsave(&tx->lock, flags); |
| 566 | udev->send_complete = 1; |
| 567 | queue_work(usb_tx_wq, &udev->work_tx.work); |
| 568 | spin_unlock_irqrestore(&tx->lock, flags); |
| 569 | } |
| 570 | |
| 571 | static int send_tx_packet(struct usb_device *usbdev, struct usb_tx *t, u32 len) |
| 572 | { |
| 573 | int ret = 0; |
| 574 | |
| 575 | if (!(len%512)) |
| 576 | len++; |
| 577 | |
| 578 | usb_fill_bulk_urb(t->urb, |
| 579 | usbdev, |
| 580 | usb_sndbulkpipe(usbdev, 2), |
| 581 | t->buf, |
| 582 | len, |
| 583 | gdm_usb_send_complete, |
| 584 | t); |
| 585 | |
| 586 | ret = usb_submit_urb(t->urb, GFP_ATOMIC); |
| 587 | |
| 588 | if (ret) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 589 | pr_err("usb_submit_urb failed: %d\n", ret); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 590 | |
| 591 | usb_mark_last_busy(usbdev); |
| 592 | |
| 593 | return ret; |
| 594 | } |
| 595 | |
| 596 | static u32 packet_aggregation(struct lte_udev *udev, u8 *send_buf) |
| 597 | { |
| 598 | struct tx_cxt *tx = &udev->tx; |
| 599 | struct usb_tx_sdu *t_sdu = NULL; |
| 600 | struct multi_sdu *multi_sdu = (struct multi_sdu *)send_buf; |
| 601 | u16 send_len = 0; |
| 602 | u16 num_packet = 0; |
| 603 | unsigned long flags; |
| 604 | |
| 605 | multi_sdu->cmd_evt = gdm_cpu_to_dev16(&udev->gdm_ed, LTE_TX_MULTI_SDU); |
| 606 | |
| 607 | while (num_packet < MAX_PACKET_IN_MULTI_SDU) { |
| 608 | spin_lock_irqsave(&tx->lock, flags); |
| 609 | if (list_empty(&tx->sdu_list)) { |
| 610 | spin_unlock_irqrestore(&tx->lock, flags); |
| 611 | break; |
| 612 | } |
| 613 | |
| 614 | t_sdu = list_entry(tx->sdu_list.next, struct usb_tx_sdu, list); |
| 615 | if (send_len + t_sdu->len > MAX_SDU_SIZE) { |
| 616 | spin_unlock_irqrestore(&tx->lock, flags); |
| 617 | break; |
| 618 | } |
| 619 | |
| 620 | list_del(&t_sdu->list); |
| 621 | spin_unlock_irqrestore(&tx->lock, flags); |
| 622 | |
| 623 | memcpy(multi_sdu->data + send_len, t_sdu->buf, t_sdu->len); |
| 624 | |
| 625 | send_len += (t_sdu->len + 3) & 0xfffc; |
| 626 | num_packet++; |
| 627 | |
| 628 | if (tx->avail_count > 10) |
| 629 | t_sdu->callback(t_sdu->cb_data); |
| 630 | |
| 631 | spin_lock_irqsave(&tx->lock, flags); |
| 632 | put_tx_struct(tx, t_sdu); |
| 633 | spin_unlock_irqrestore(&tx->lock, flags); |
| 634 | } |
| 635 | |
| 636 | multi_sdu->len = gdm_cpu_to_dev16(&udev->gdm_ed, send_len); |
| 637 | multi_sdu->num_packet = gdm_cpu_to_dev16(&udev->gdm_ed, num_packet); |
| 638 | |
| 639 | return send_len + offsetof(struct multi_sdu, data); |
| 640 | } |
| 641 | |
| 642 | static void do_tx(struct work_struct *work) |
| 643 | { |
| 644 | struct lte_udev *udev = container_of(work, struct lte_udev, work_tx.work); |
| 645 | struct usb_device *usbdev = udev->usbdev; |
| 646 | struct tx_cxt *tx = &udev->tx; |
| 647 | struct usb_tx *t = NULL; |
| 648 | int is_send = 0; |
| 649 | u32 len = 0; |
| 650 | unsigned long flags; |
| 651 | |
| 652 | if (!usb_autopm_get_interface(udev->intf)) |
| 653 | usb_autopm_put_interface(udev->intf); |
| 654 | |
| 655 | if (udev->usb_state == PM_SUSPEND) |
| 656 | return; |
| 657 | |
| 658 | spin_lock_irqsave(&tx->lock, flags); |
| 659 | if (!udev->send_complete) { |
| 660 | spin_unlock_irqrestore(&tx->lock, flags); |
| 661 | return; |
| 662 | } else { |
| 663 | udev->send_complete = 0; |
| 664 | } |
| 665 | |
| 666 | if (!list_empty(&tx->hci_list)) { |
| 667 | t = list_entry(tx->hci_list.next, struct usb_tx, list); |
| 668 | list_del(&t->list); |
| 669 | len = t->len; |
| 670 | t->is_sdu = 0; |
| 671 | is_send = 1; |
| 672 | } else if (!list_empty(&tx->sdu_list)) { |
| 673 | if (udev->tx_stop) { |
| 674 | udev->send_complete = 1; |
| 675 | spin_unlock_irqrestore(&tx->lock, flags); |
| 676 | return; |
| 677 | } |
| 678 | |
| 679 | t = alloc_tx_struct(TX_BUF_SIZE); |
| 680 | t->callback = NULL; |
| 681 | t->tx = tx; |
| 682 | t->is_sdu = 1; |
| 683 | is_send = 1; |
| 684 | } |
| 685 | |
| 686 | if (!is_send) { |
| 687 | udev->send_complete = 1; |
| 688 | spin_unlock_irqrestore(&tx->lock, flags); |
| 689 | return; |
| 690 | } |
| 691 | spin_unlock_irqrestore(&tx->lock, flags); |
| 692 | |
| 693 | if (t->is_sdu) |
| 694 | len = packet_aggregation(udev, t->buf); |
| 695 | |
| 696 | if (send_tx_packet(usbdev, t, len)) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 697 | pr_err("send_tx_packet failed\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 698 | t->callback = NULL; |
| 699 | gdm_usb_send_complete(t->urb); |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | #define SDU_PARAM_LEN 12 |
| 704 | static int gdm_usb_sdu_send(void *priv_dev, void *data, int len, |
| 705 | unsigned int dftEpsId, unsigned int epsId, |
| 706 | void (*cb)(void *data), void *cb_data, |
| 707 | int dev_idx, int nic_type) |
| 708 | { |
| 709 | struct lte_udev *udev = priv_dev; |
| 710 | struct tx_cxt *tx = &udev->tx; |
| 711 | struct usb_tx_sdu *t_sdu; |
| 712 | struct sdu *sdu = NULL; |
| 713 | unsigned long flags; |
| 714 | int no_spc = 0; |
| 715 | u16 send_len; |
| 716 | |
| 717 | if (!udev->usbdev) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 718 | pr_err("sdu send - invalid device\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 719 | return TX_NO_DEV; |
| 720 | } |
| 721 | |
| 722 | spin_lock_irqsave(&tx->lock, flags); |
| 723 | t_sdu = get_tx_sdu_struct(tx, &no_spc); |
| 724 | spin_unlock_irqrestore(&tx->lock, flags); |
| 725 | |
| 726 | if (t_sdu == NULL) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 727 | pr_err("sdu send - free list empty\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 728 | return TX_NO_SPC; |
| 729 | } |
| 730 | |
| 731 | sdu = (struct sdu *)t_sdu->buf; |
| 732 | sdu->cmd_evt = gdm_cpu_to_dev16(&udev->gdm_ed, LTE_TX_SDU); |
| 733 | if (nic_type == NIC_TYPE_ARP) { |
| 734 | send_len = len + SDU_PARAM_LEN; |
| 735 | memcpy(sdu->data, data, len); |
| 736 | } else { |
| 737 | send_len = len - ETH_HLEN; |
| 738 | send_len += SDU_PARAM_LEN; |
| 739 | memcpy(sdu->data, data+ETH_HLEN, len-ETH_HLEN); |
| 740 | } |
| 741 | |
| 742 | sdu->len = gdm_cpu_to_dev16(&udev->gdm_ed, send_len); |
| 743 | sdu->dftEpsId = gdm_cpu_to_dev32(&udev->gdm_ed, dftEpsId); |
| 744 | sdu->bearer_ID = gdm_cpu_to_dev32(&udev->gdm_ed, epsId); |
| 745 | sdu->nic_type = gdm_cpu_to_dev32(&udev->gdm_ed, nic_type); |
| 746 | |
| 747 | t_sdu->len = send_len + HCI_HEADER_SIZE; |
| 748 | t_sdu->callback = cb; |
| 749 | t_sdu->cb_data = cb_data; |
| 750 | |
| 751 | spin_lock_irqsave(&tx->lock, flags); |
| 752 | list_add_tail(&t_sdu->list, &tx->sdu_list); |
| 753 | queue_work(usb_tx_wq, &udev->work_tx.work); |
| 754 | spin_unlock_irqrestore(&tx->lock, flags); |
| 755 | |
| 756 | if (no_spc) |
| 757 | return TX_NO_BUFFER; |
| 758 | |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | static int gdm_usb_hci_send(void *priv_dev, void *data, int len, |
| 763 | void (*cb)(void *data), void *cb_data) |
| 764 | { |
| 765 | struct lte_udev *udev = priv_dev; |
| 766 | struct tx_cxt *tx = &udev->tx; |
| 767 | struct usb_tx *t; |
| 768 | unsigned long flags; |
| 769 | |
| 770 | if (!udev->usbdev) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 771 | pr_err("hci send - invalid device\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 772 | return -ENODEV; |
| 773 | } |
| 774 | |
| 775 | t = alloc_tx_struct(len); |
| 776 | if (t == NULL) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 777 | pr_err("hci_send - out of memory\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 778 | return -ENOMEM; |
| 779 | } |
| 780 | |
| 781 | memcpy(t->buf, data, len); |
| 782 | t->callback = cb; |
| 783 | t->cb_data = cb_data; |
| 784 | t->len = len; |
| 785 | t->tx = tx; |
| 786 | t->is_sdu = 0; |
| 787 | |
| 788 | spin_lock_irqsave(&tx->lock, flags); |
| 789 | list_add_tail(&t->list, &tx->hci_list); |
| 790 | queue_work(usb_tx_wq, &udev->work_tx.work); |
| 791 | spin_unlock_irqrestore(&tx->lock, flags); |
| 792 | |
| 793 | return 0; |
| 794 | } |
| 795 | |
| 796 | static struct gdm_endian *gdm_usb_get_endian(void *priv_dev) |
| 797 | { |
| 798 | struct lte_udev *udev = priv_dev; |
| 799 | |
| 800 | return &udev->gdm_ed; |
| 801 | } |
| 802 | |
| 803 | static int gdm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| 804 | { |
| 805 | int ret = 0; |
| 806 | struct phy_dev *phy_dev = NULL; |
| 807 | struct lte_udev *udev = NULL; |
| 808 | u16 idVendor, idProduct; |
| 809 | int bInterfaceNumber; |
| 810 | struct usb_device *usbdev = interface_to_usbdev(intf); |
| 811 | |
| 812 | bInterfaceNumber = intf->cur_altsetting->desc.bInterfaceNumber; |
| 813 | idVendor = __le16_to_cpu(usbdev->descriptor.idVendor); |
| 814 | idProduct = __le16_to_cpu(usbdev->descriptor.idProduct); |
| 815 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 816 | pr_info("net vid = 0x%04x pid = 0x%04x\n", idVendor, idProduct); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 817 | |
| 818 | if (bInterfaceNumber > NETWORK_INTERFACE) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 819 | pr_info("not a network device\n"); |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 820 | return -ENODEV; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 821 | } |
| 822 | |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 823 | phy_dev = kzalloc(sizeof(struct phy_dev), GFP_KERNEL); |
| 824 | if (!phy_dev) |
| 825 | return -ENOMEM; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 826 | |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 827 | udev = kzalloc(sizeof(struct lte_udev), GFP_KERNEL); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 828 | if (!udev) { |
| 829 | ret = -ENOMEM; |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 830 | goto err_udev; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 831 | } |
| 832 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 833 | phy_dev->priv_dev = (void *)udev; |
| 834 | phy_dev->send_hci_func = gdm_usb_hci_send; |
| 835 | phy_dev->send_sdu_func = gdm_usb_sdu_send; |
| 836 | phy_dev->rcv_func = gdm_usb_recv; |
| 837 | phy_dev->get_endian = gdm_usb_get_endian; |
| 838 | |
| 839 | udev->usbdev = usbdev; |
| 840 | ret = init_usb(udev); |
| 841 | if (ret < 0) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 842 | pr_err("init_usb func failed\n"); |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 843 | goto err_init_usb; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 844 | } |
| 845 | udev->intf = intf; |
| 846 | |
| 847 | intf->needs_remote_wakeup = 1; |
| 848 | usb_enable_autosuspend(usbdev); |
| 849 | pm_runtime_set_autosuspend_delay(&usbdev->dev, AUTO_SUSPEND_TIMER); |
| 850 | |
| 851 | /* List up hosts with big endians, otherwise, defaults to little endian */ |
| 852 | if (idProduct == PID_GDM7243) |
Won Kang | 9c02d0d | 2013-07-27 15:42:18 +0900 | [diff] [blame] | 853 | gdm_set_endian(&udev->gdm_ed, ENDIANNESS_BIG); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 854 | else |
Won Kang | 9c02d0d | 2013-07-27 15:42:18 +0900 | [diff] [blame] | 855 | gdm_set_endian(&udev->gdm_ed, ENDIANNESS_LITTLE); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 856 | |
| 857 | ret = request_mac_address(udev); |
| 858 | if (ret < 0) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 859 | pr_err("request Mac address failed\n"); |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 860 | goto err_mac_address; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 861 | } |
| 862 | |
| 863 | start_rx_proc(phy_dev); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 864 | usb_get_dev(usbdev); |
| 865 | usb_set_intfdata(intf, phy_dev); |
| 866 | |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 867 | return 0; |
| 868 | |
| 869 | err_mac_address: |
| 870 | release_usb(udev); |
| 871 | err_init_usb: |
| 872 | kfree(udev); |
| 873 | err_udev: |
| 874 | kfree(phy_dev); |
| 875 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 876 | return ret; |
| 877 | } |
| 878 | |
| 879 | static void gdm_usb_disconnect(struct usb_interface *intf) |
| 880 | { |
| 881 | struct phy_dev *phy_dev; |
| 882 | struct lte_udev *udev; |
| 883 | u16 idVendor, idProduct; |
| 884 | struct usb_device *usbdev; |
| 885 | usbdev = interface_to_usbdev(intf); |
| 886 | |
| 887 | idVendor = __le16_to_cpu(usbdev->descriptor.idVendor); |
| 888 | idProduct = __le16_to_cpu(usbdev->descriptor.idProduct); |
| 889 | |
| 890 | phy_dev = usb_get_intfdata(intf); |
| 891 | |
| 892 | udev = phy_dev->priv_dev; |
| 893 | unregister_lte_device(phy_dev); |
| 894 | |
| 895 | release_usb(udev); |
| 896 | |
| 897 | kfree(udev); |
| 898 | udev = NULL; |
| 899 | |
| 900 | kfree(phy_dev); |
| 901 | phy_dev = NULL; |
| 902 | |
| 903 | usb_put_dev(usbdev); |
| 904 | } |
| 905 | |
| 906 | static int gdm_usb_suspend(struct usb_interface *intf, pm_message_t pm_msg) |
| 907 | { |
| 908 | struct phy_dev *phy_dev; |
| 909 | struct lte_udev *udev; |
| 910 | struct rx_cxt *rx; |
| 911 | struct usb_rx *r; |
| 912 | struct usb_rx *r_next; |
| 913 | unsigned long flags; |
| 914 | |
| 915 | phy_dev = usb_get_intfdata(intf); |
| 916 | udev = phy_dev->priv_dev; |
| 917 | rx = &udev->rx; |
| 918 | if (udev->usb_state != PM_NORMAL) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 919 | pr_err("usb suspend - invalid state\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 920 | return -1; |
| 921 | } |
| 922 | |
| 923 | udev->usb_state = PM_SUSPEND; |
| 924 | |
| 925 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 926 | list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, rx_submit_list) |
| 927 | { |
| 928 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 929 | usb_kill_urb(r->urb); |
| 930 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 931 | } |
| 932 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 933 | |
| 934 | return 0; |
| 935 | } |
| 936 | |
| 937 | static int gdm_usb_resume(struct usb_interface *intf) |
| 938 | { |
| 939 | struct phy_dev *phy_dev; |
| 940 | struct lte_udev *udev; |
| 941 | struct tx_cxt *tx; |
| 942 | struct rx_cxt *rx; |
| 943 | unsigned long flags; |
| 944 | int issue_count; |
| 945 | int i; |
| 946 | |
| 947 | phy_dev = usb_get_intfdata(intf); |
| 948 | udev = phy_dev->priv_dev; |
| 949 | rx = &udev->rx; |
| 950 | |
| 951 | if (udev->usb_state != PM_SUSPEND) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 952 | pr_err("usb resume - invalid state\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 953 | return -1; |
| 954 | } |
| 955 | udev->usb_state = PM_NORMAL; |
| 956 | |
| 957 | spin_lock_irqsave(&rx->rx_lock, flags); |
| 958 | issue_count = rx->avail_count - MAX_RX_SUBMIT_COUNT; |
| 959 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 960 | |
| 961 | if (issue_count >= 0) { |
| 962 | for (i = 0; i < issue_count; i++) |
| 963 | gdm_usb_recv(phy_dev->priv_dev, |
| 964 | udev->rx_cb, |
| 965 | phy_dev, |
| 966 | USB_COMPLETE); |
| 967 | } |
| 968 | |
| 969 | tx = &udev->tx; |
| 970 | spin_lock_irqsave(&tx->lock, flags); |
| 971 | queue_work(usb_tx_wq, &udev->work_tx.work); |
| 972 | spin_unlock_irqrestore(&tx->lock, flags); |
| 973 | |
| 974 | return 0; |
| 975 | } |
| 976 | |
| 977 | static struct usb_driver gdm_usb_lte_driver = { |
| 978 | .name = "gdm_lte", |
| 979 | .probe = gdm_usb_probe, |
| 980 | .disconnect = gdm_usb_disconnect, |
| 981 | .id_table = id_table, |
| 982 | .supports_autosuspend = 1, |
| 983 | .suspend = gdm_usb_suspend, |
| 984 | .resume = gdm_usb_resume, |
| 985 | .reset_resume = gdm_usb_resume, |
| 986 | }; |
| 987 | |
| 988 | static int __init gdm_usb_lte_init(void) |
| 989 | { |
| 990 | if (gdm_lte_event_init() < 0) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 991 | pr_err("error creating event\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 992 | return -1; |
| 993 | } |
| 994 | |
| 995 | usb_tx_wq = create_workqueue("usb_tx_wq"); |
| 996 | if (usb_tx_wq == NULL) |
| 997 | return -1; |
| 998 | |
| 999 | usb_rx_wq = create_workqueue("usb_rx_wq"); |
| 1000 | if (usb_rx_wq == NULL) |
| 1001 | return -1; |
| 1002 | |
| 1003 | return usb_register(&gdm_usb_lte_driver); |
| 1004 | } |
| 1005 | |
| 1006 | static void __exit gdm_usb_lte_exit(void) |
| 1007 | { |
| 1008 | gdm_lte_event_exit(); |
| 1009 | |
| 1010 | usb_deregister(&gdm_usb_lte_driver); |
| 1011 | |
| 1012 | if (usb_tx_wq) { |
| 1013 | flush_workqueue(usb_tx_wq); |
| 1014 | destroy_workqueue(usb_tx_wq); |
| 1015 | } |
| 1016 | |
| 1017 | if (usb_rx_wq) { |
| 1018 | flush_workqueue(usb_rx_wq); |
| 1019 | destroy_workqueue(usb_rx_wq); |
| 1020 | } |
| 1021 | } |
| 1022 | |
| 1023 | module_init(gdm_usb_lte_init); |
| 1024 | module_exit(gdm_usb_lte_exit); |
| 1025 | |
| 1026 | MODULE_VERSION(DRIVER_VERSION); |
| 1027 | MODULE_DESCRIPTION("GCT LTE USB Device Driver"); |
| 1028 | MODULE_LICENSE("GPL"); |