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) \ |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 33 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ |
| 34 | USB_DEVICE_ID_MATCH_INT_CLASS | \ |
| 35 | USB_DEVICE_ID_MATCH_INT_SUBCLASS,\ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 36 | .idVendor = vid,\ |
| 37 | .idProduct = pid,\ |
| 38 | .bInterfaceClass = USB_CLASS_COMM,\ |
| 39 | .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET |
| 40 | |
| 41 | #define USB_DEVICE_MASS_DATA(vid, pid) \ |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 42 | .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ |
| 43 | USB_DEVICE_ID_MATCH_INT_INFO,\ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 44 | .idVendor = vid,\ |
| 45 | .idProduct = pid,\ |
| 46 | .bInterfaceSubClass = USB_SC_SCSI, \ |
| 47 | .bInterfaceClass = USB_CLASS_MASS_STORAGE,\ |
| 48 | .bInterfaceProtocol = USB_PR_BULK |
| 49 | |
| 50 | static const struct usb_device_id id_table[] = { |
| 51 | { USB_DEVICE_CDC_DATA(VID_GCT, PID_GDM7240) }, /* GCT GDM7240 */ |
| 52 | { USB_DEVICE_CDC_DATA(VID_GCT, PID_GDM7243) }, /* GCT GDM7243 */ |
| 53 | { } |
| 54 | }; |
| 55 | |
| 56 | MODULE_DEVICE_TABLE(usb, id_table); |
| 57 | |
| 58 | static struct workqueue_struct *usb_tx_wq; |
| 59 | static struct workqueue_struct *usb_rx_wq; |
| 60 | |
| 61 | static void do_tx(struct work_struct *work); |
| 62 | static void do_rx(struct work_struct *work); |
| 63 | |
| 64 | static int gdm_usb_recv(void *priv_dev, |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 65 | int (*cb)(void *cb_data, |
| 66 | void *data, int len, int context), |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 67 | void *cb_data, |
| 68 | int context); |
| 69 | |
| 70 | static int request_mac_address(struct lte_udev *udev) |
| 71 | { |
| 72 | u8 buf[16] = {0,}; |
| 73 | struct hci_packet *hci = (struct hci_packet *)buf; |
| 74 | struct usb_device *usbdev = udev->usbdev; |
| 75 | int actual; |
| 76 | int ret = -1; |
| 77 | |
| 78 | hci->cmd_evt = gdm_cpu_to_dev16(&udev->gdm_ed, LTE_GET_INFORMATION); |
| 79 | hci->len = gdm_cpu_to_dev16(&udev->gdm_ed, 1); |
| 80 | hci->data[0] = MAC_ADDRESS; |
| 81 | |
| 82 | ret = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 2), buf, 5, |
| 83 | &actual, 1000); |
| 84 | |
| 85 | udev->request_mac_addr = 1; |
| 86 | |
| 87 | return ret; |
| 88 | } |
| 89 | |
| 90 | static struct usb_tx *alloc_tx_struct(int len) |
| 91 | { |
| 92 | struct usb_tx *t = NULL; |
| 93 | int ret = 0; |
| 94 | |
Teodora Baluta | 1f55864 | 2013-10-23 01:15:26 +0300 | [diff] [blame] | 95 | t = kzalloc(sizeof(struct usb_tx), GFP_ATOMIC); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 96 | if (!t) { |
| 97 | ret = -ENOMEM; |
| 98 | goto out; |
| 99 | } |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 100 | |
| 101 | t->urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 102 | if (!(len % 512)) |
| 103 | len++; |
| 104 | |
| 105 | t->buf = kmalloc(len, GFP_ATOMIC); |
| 106 | if (!t->urb || !t->buf) { |
| 107 | ret = -ENOMEM; |
| 108 | goto out; |
| 109 | } |
| 110 | |
| 111 | out: |
| 112 | if (ret < 0) { |
| 113 | if (t) { |
| 114 | usb_free_urb(t->urb); |
| 115 | kfree(t->buf); |
| 116 | kfree(t); |
| 117 | } |
| 118 | return NULL; |
| 119 | } |
| 120 | |
| 121 | return t; |
| 122 | } |
| 123 | |
| 124 | static struct usb_tx_sdu *alloc_tx_sdu_struct(void) |
| 125 | { |
Dan Carpenter | 75bc5fa | 2014-02-18 15:18:10 +0300 | [diff] [blame] | 126 | struct usb_tx_sdu *t_sdu; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 127 | |
Teodora Baluta | 1f55864 | 2013-10-23 01:15:26 +0300 | [diff] [blame] | 128 | t_sdu = kzalloc(sizeof(struct usb_tx_sdu), GFP_ATOMIC); |
Dan Carpenter | 75bc5fa | 2014-02-18 15:18:10 +0300 | [diff] [blame] | 129 | if (!t_sdu) |
| 130 | return NULL; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 131 | |
| 132 | t_sdu->buf = kmalloc(SDU_BUF_SIZE, GFP_ATOMIC); |
| 133 | if (!t_sdu->buf) { |
Dan Carpenter | 75bc5fa | 2014-02-18 15:18:10 +0300 | [diff] [blame] | 134 | kfree(t_sdu); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 135 | return NULL; |
| 136 | } |
| 137 | |
| 138 | return t_sdu; |
| 139 | } |
| 140 | |
| 141 | static void free_tx_struct(struct usb_tx *t) |
| 142 | { |
| 143 | if (t) { |
| 144 | usb_free_urb(t->urb); |
| 145 | kfree(t->buf); |
| 146 | kfree(t); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | static void free_tx_sdu_struct(struct usb_tx_sdu *t_sdu) |
| 151 | { |
| 152 | if (t_sdu) { |
| 153 | kfree(t_sdu->buf); |
| 154 | kfree(t_sdu); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | static struct usb_tx_sdu *get_tx_sdu_struct(struct tx_cxt *tx, int *no_spc) |
| 159 | { |
| 160 | struct usb_tx_sdu *t_sdu; |
| 161 | |
| 162 | if (list_empty(&tx->free_list)) |
| 163 | return NULL; |
| 164 | |
| 165 | t_sdu = list_entry(tx->free_list.next, struct usb_tx_sdu, list); |
| 166 | list_del(&t_sdu->list); |
| 167 | |
| 168 | tx->avail_count--; |
| 169 | |
| 170 | *no_spc = list_empty(&tx->free_list) ? 1 : 0; |
| 171 | |
| 172 | return t_sdu; |
| 173 | } |
| 174 | |
| 175 | static void put_tx_struct(struct tx_cxt *tx, struct usb_tx_sdu *t_sdu) |
| 176 | { |
| 177 | list_add_tail(&t_sdu->list, &tx->free_list); |
| 178 | tx->avail_count++; |
| 179 | } |
| 180 | |
| 181 | static struct usb_rx *alloc_rx_struct(void) |
| 182 | { |
| 183 | struct usb_rx *r = NULL; |
| 184 | int ret = 0; |
| 185 | |
| 186 | r = kmalloc(sizeof(struct usb_rx), GFP_ATOMIC); |
| 187 | if (!r) { |
| 188 | ret = -ENOMEM; |
| 189 | goto out; |
| 190 | } |
| 191 | |
| 192 | r->urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 193 | r->buf = kmalloc(RX_BUF_SIZE, GFP_ATOMIC); |
| 194 | if (!r->urb || !r->buf) { |
| 195 | ret = -ENOMEM; |
| 196 | goto out; |
| 197 | } |
| 198 | out: |
| 199 | |
| 200 | if (ret < 0) { |
| 201 | if (r) { |
| 202 | usb_free_urb(r->urb); |
| 203 | kfree(r->buf); |
| 204 | kfree(r); |
| 205 | } |
| 206 | return NULL; |
| 207 | } |
| 208 | |
| 209 | return r; |
| 210 | } |
| 211 | |
| 212 | static void free_rx_struct(struct usb_rx *r) |
| 213 | { |
| 214 | if (r) { |
| 215 | usb_free_urb(r->urb); |
| 216 | kfree(r->buf); |
| 217 | kfree(r); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | static struct usb_rx *get_rx_struct(struct rx_cxt *rx, int *no_spc) |
| 222 | { |
| 223 | struct usb_rx *r; |
| 224 | unsigned long flags; |
| 225 | |
| 226 | spin_lock_irqsave(&rx->rx_lock, flags); |
| 227 | |
| 228 | if (list_empty(&rx->free_list)) { |
| 229 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 230 | return NULL; |
| 231 | } |
| 232 | |
| 233 | r = list_entry(rx->free_list.next, struct usb_rx, free_list); |
| 234 | list_del(&r->free_list); |
| 235 | |
| 236 | rx->avail_count--; |
| 237 | |
| 238 | *no_spc = list_empty(&rx->free_list) ? 1 : 0; |
| 239 | |
| 240 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 241 | |
| 242 | return r; |
| 243 | } |
| 244 | |
| 245 | static void put_rx_struct(struct rx_cxt *rx, struct usb_rx *r) |
| 246 | { |
| 247 | unsigned long flags; |
| 248 | |
| 249 | spin_lock_irqsave(&rx->rx_lock, flags); |
| 250 | |
| 251 | list_add_tail(&r->free_list, &rx->free_list); |
| 252 | rx->avail_count++; |
| 253 | |
| 254 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 255 | } |
| 256 | |
| 257 | static void release_usb(struct lte_udev *udev) |
| 258 | { |
| 259 | struct rx_cxt *rx = &udev->rx; |
| 260 | struct tx_cxt *tx = &udev->tx; |
| 261 | struct usb_tx *t, *t_next; |
| 262 | struct usb_rx *r, *r_next; |
| 263 | struct usb_tx_sdu *t_sdu, *t_sdu_next; |
| 264 | unsigned long flags; |
| 265 | |
| 266 | spin_lock_irqsave(&tx->lock, flags); |
| 267 | list_for_each_entry_safe(t_sdu, t_sdu_next, &tx->sdu_list, list) |
| 268 | { |
| 269 | list_del(&t_sdu->list); |
| 270 | free_tx_sdu_struct(t_sdu); |
| 271 | } |
| 272 | |
| 273 | list_for_each_entry_safe(t, t_next, &tx->hci_list, list) |
| 274 | { |
| 275 | list_del(&t->list); |
| 276 | free_tx_struct(t); |
| 277 | } |
| 278 | |
| 279 | list_for_each_entry_safe(t_sdu, t_sdu_next, &tx->free_list, list) |
| 280 | { |
| 281 | list_del(&t_sdu->list); |
| 282 | free_tx_sdu_struct(t_sdu); |
| 283 | } |
| 284 | spin_unlock_irqrestore(&tx->lock, flags); |
| 285 | |
| 286 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 287 | list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, rx_submit_list) |
| 288 | { |
| 289 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 290 | usb_kill_urb(r->urb); |
| 291 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 292 | } |
| 293 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 294 | |
| 295 | spin_lock_irqsave(&rx->rx_lock, flags); |
| 296 | list_for_each_entry_safe(r, r_next, &rx->free_list, free_list) |
| 297 | { |
| 298 | list_del(&r->free_list); |
| 299 | free_rx_struct(r); |
| 300 | } |
| 301 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 302 | |
| 303 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 304 | list_for_each_entry_safe(r, r_next, &rx->to_host_list, to_host_list) |
| 305 | { |
| 306 | if (r->index == (void *)udev) { |
| 307 | list_del(&r->to_host_list); |
| 308 | free_rx_struct(r); |
| 309 | } |
| 310 | } |
| 311 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 312 | } |
| 313 | |
| 314 | static int init_usb(struct lte_udev *udev) |
| 315 | { |
| 316 | int ret = 0; |
| 317 | int i; |
| 318 | struct tx_cxt *tx = &udev->tx; |
| 319 | struct rx_cxt *rx = &udev->rx; |
| 320 | struct usb_tx_sdu *t_sdu = NULL; |
| 321 | struct usb_rx *r = NULL; |
| 322 | |
| 323 | udev->send_complete = 1; |
| 324 | udev->tx_stop = 0; |
| 325 | udev->request_mac_addr = 0; |
| 326 | udev->usb_state = PM_NORMAL; |
| 327 | |
| 328 | INIT_LIST_HEAD(&tx->sdu_list); |
| 329 | INIT_LIST_HEAD(&tx->hci_list); |
| 330 | INIT_LIST_HEAD(&tx->free_list); |
| 331 | INIT_LIST_HEAD(&rx->rx_submit_list); |
| 332 | INIT_LIST_HEAD(&rx->free_list); |
| 333 | INIT_LIST_HEAD(&rx->to_host_list); |
| 334 | spin_lock_init(&tx->lock); |
| 335 | spin_lock_init(&rx->rx_lock); |
| 336 | spin_lock_init(&rx->submit_lock); |
| 337 | spin_lock_init(&rx->to_host_lock); |
| 338 | |
| 339 | tx->avail_count = 0; |
| 340 | rx->avail_count = 0; |
| 341 | |
| 342 | udev->rx_cb = NULL; |
| 343 | |
| 344 | for (i = 0; i < MAX_NUM_SDU_BUF; i++) { |
| 345 | t_sdu = alloc_tx_sdu_struct(); |
| 346 | if (t_sdu == NULL) { |
| 347 | ret = -ENOMEM; |
| 348 | goto fail; |
| 349 | } |
| 350 | |
| 351 | list_add(&t_sdu->list, &tx->free_list); |
| 352 | tx->avail_count++; |
| 353 | } |
| 354 | |
| 355 | for (i = 0; i < MAX_RX_SUBMIT_COUNT*2; i++) { |
| 356 | r = alloc_rx_struct(); |
| 357 | if (r == NULL) { |
| 358 | ret = -ENOMEM; |
| 359 | goto fail; |
| 360 | } |
| 361 | |
| 362 | list_add(&r->free_list, &rx->free_list); |
| 363 | rx->avail_count++; |
| 364 | } |
| 365 | INIT_DELAYED_WORK(&udev->work_tx, do_tx); |
| 366 | INIT_DELAYED_WORK(&udev->work_rx, do_rx); |
| 367 | return 0; |
| 368 | fail: |
| 369 | return ret; |
| 370 | } |
| 371 | |
| 372 | static int set_mac_address(u8 *data, void *arg) |
| 373 | { |
| 374 | struct phy_dev *phy_dev = (struct phy_dev *)arg; |
| 375 | struct lte_udev *udev = phy_dev->priv_dev; |
| 376 | struct tlv *tlv = (struct tlv *)data; |
| 377 | u8 mac_address[ETH_ALEN] = {0, }; |
| 378 | |
| 379 | if (tlv->type == MAC_ADDRESS && udev->request_mac_addr) { |
| 380 | memcpy(mac_address, tlv->data, tlv->len); |
| 381 | |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 382 | if (register_lte_device(phy_dev, |
| 383 | &udev->intf->dev, mac_address) < 0) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 384 | pr_err("register lte device failed\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 385 | |
| 386 | udev->request_mac_addr = 0; |
| 387 | |
| 388 | return 1; |
| 389 | } |
| 390 | |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | static void do_rx(struct work_struct *work) |
| 395 | { |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 396 | struct lte_udev *udev = |
| 397 | container_of(work, struct lte_udev, work_rx.work); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 398 | struct rx_cxt *rx = &udev->rx; |
| 399 | struct usb_rx *r; |
| 400 | struct hci_packet *hci; |
| 401 | struct phy_dev *phy_dev; |
| 402 | u16 cmd_evt; |
| 403 | int ret; |
| 404 | unsigned long flags; |
| 405 | |
| 406 | while (1) { |
| 407 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 408 | if (list_empty(&rx->to_host_list)) { |
| 409 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 410 | break; |
| 411 | } |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 412 | r = list_entry(rx->to_host_list.next, |
| 413 | struct usb_rx, to_host_list); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 414 | list_del(&r->to_host_list); |
| 415 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 416 | |
| 417 | phy_dev = (struct phy_dev *)r->cb_data; |
| 418 | udev = (struct lte_udev *)phy_dev->priv_dev; |
| 419 | hci = (struct hci_packet *)r->buf; |
| 420 | cmd_evt = gdm_dev16_to_cpu(&udev->gdm_ed, hci->cmd_evt); |
| 421 | |
| 422 | switch (cmd_evt) { |
| 423 | case LTE_GET_INFORMATION_RESULT: |
| 424 | if (set_mac_address(hci->data, r->cb_data) == 0) { |
| 425 | ret = r->callback(r->cb_data, |
| 426 | r->buf, |
| 427 | r->urb->actual_length, |
| 428 | KERNEL_THREAD); |
| 429 | } |
| 430 | break; |
| 431 | |
| 432 | default: |
| 433 | if (r->callback) { |
| 434 | ret = r->callback(r->cb_data, |
| 435 | r->buf, |
| 436 | r->urb->actual_length, |
| 437 | KERNEL_THREAD); |
| 438 | |
| 439 | if (ret == -EAGAIN) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 440 | pr_err("failed to send received data\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 441 | } |
| 442 | break; |
| 443 | } |
| 444 | |
| 445 | put_rx_struct(rx, r); |
| 446 | |
| 447 | gdm_usb_recv(udev, |
| 448 | r->callback, |
| 449 | r->cb_data, |
| 450 | USB_COMPLETE); |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | static void remove_rx_submit_list(struct usb_rx *r, struct rx_cxt *rx) |
| 455 | { |
| 456 | unsigned long flags; |
| 457 | struct usb_rx *r_remove, *r_remove_next; |
| 458 | |
| 459 | spin_lock_irqsave(&rx->submit_lock, flags); |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 460 | list_for_each_entry_safe(r_remove, |
| 461 | r_remove_next, &rx->rx_submit_list, rx_submit_list) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 462 | { |
| 463 | if (r == r_remove) { |
| 464 | list_del(&r->rx_submit_list); |
| 465 | break; |
| 466 | } |
| 467 | } |
| 468 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 469 | } |
| 470 | |
| 471 | static void gdm_usb_rcv_complete(struct urb *urb) |
| 472 | { |
| 473 | struct usb_rx *r = urb->context; |
| 474 | struct rx_cxt *rx = r->rx; |
| 475 | unsigned long flags; |
| 476 | struct lte_udev *udev = container_of(r->rx, struct lte_udev, rx); |
| 477 | struct usb_device *usbdev = udev->usbdev; |
| 478 | |
| 479 | remove_rx_submit_list(r, rx); |
| 480 | |
| 481 | if (!urb->status && r->callback) { |
| 482 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 483 | list_add_tail(&r->to_host_list, &rx->to_host_list); |
| 484 | queue_work(usb_rx_wq, &udev->work_rx.work); |
| 485 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 486 | } else { |
| 487 | if (urb->status && udev->usb_state == PM_NORMAL) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 488 | pr_err("%s: urb status error %d\n", |
| 489 | __func__, urb->status); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 490 | |
| 491 | put_rx_struct(rx, r); |
| 492 | } |
| 493 | |
| 494 | usb_mark_last_busy(usbdev); |
| 495 | } |
| 496 | |
| 497 | static int gdm_usb_recv(void *priv_dev, |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 498 | int (*cb)(void *cb_data, |
| 499 | void *data, int len, int context), |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 500 | void *cb_data, |
| 501 | int context) |
| 502 | { |
| 503 | struct lte_udev *udev = priv_dev; |
| 504 | struct usb_device *usbdev = udev->usbdev; |
| 505 | struct rx_cxt *rx = &udev->rx; |
| 506 | struct usb_rx *r; |
| 507 | int no_spc; |
| 508 | int ret; |
| 509 | unsigned long flags; |
| 510 | |
| 511 | if (!udev->usbdev) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 512 | pr_err("invalid device\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 513 | return -ENODEV; |
| 514 | } |
| 515 | |
| 516 | r = get_rx_struct(rx, &no_spc); |
| 517 | if (!r) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 518 | pr_err("Out of Memory\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 519 | return -ENOMEM; |
| 520 | } |
| 521 | |
| 522 | udev->rx_cb = cb; |
| 523 | r->callback = cb; |
| 524 | r->cb_data = cb_data; |
| 525 | r->index = (void *)udev; |
| 526 | r->rx = rx; |
| 527 | |
| 528 | usb_fill_bulk_urb(r->urb, |
| 529 | usbdev, |
| 530 | usb_rcvbulkpipe(usbdev, 0x83), |
| 531 | r->buf, |
| 532 | RX_BUF_SIZE, |
| 533 | gdm_usb_rcv_complete, |
| 534 | r); |
| 535 | |
| 536 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 537 | list_add_tail(&r->rx_submit_list, &rx->rx_submit_list); |
| 538 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 539 | |
| 540 | if (context == KERNEL_THREAD) |
| 541 | ret = usb_submit_urb(r->urb, GFP_KERNEL); |
| 542 | else |
| 543 | ret = usb_submit_urb(r->urb, GFP_ATOMIC); |
| 544 | |
| 545 | if (ret) { |
| 546 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 547 | list_del(&r->rx_submit_list); |
| 548 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 549 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 550 | pr_err("usb_submit_urb failed (%p)\n", r); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 551 | put_rx_struct(rx, r); |
| 552 | } |
| 553 | |
| 554 | return ret; |
| 555 | } |
| 556 | |
| 557 | static void gdm_usb_send_complete(struct urb *urb) |
| 558 | { |
| 559 | struct usb_tx *t = urb->context; |
| 560 | struct tx_cxt *tx = t->tx; |
| 561 | struct lte_udev *udev = container_of(tx, struct lte_udev, tx); |
| 562 | unsigned long flags; |
| 563 | |
| 564 | if (urb->status == -ECONNRESET) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 565 | pr_info("CONNRESET\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 566 | return; |
| 567 | } |
| 568 | |
| 569 | if (t->callback) |
| 570 | t->callback(t->cb_data); |
| 571 | |
| 572 | free_tx_struct(t); |
| 573 | |
| 574 | spin_lock_irqsave(&tx->lock, flags); |
| 575 | udev->send_complete = 1; |
| 576 | queue_work(usb_tx_wq, &udev->work_tx.work); |
| 577 | spin_unlock_irqrestore(&tx->lock, flags); |
| 578 | } |
| 579 | |
| 580 | static int send_tx_packet(struct usb_device *usbdev, struct usb_tx *t, u32 len) |
| 581 | { |
| 582 | int ret = 0; |
| 583 | |
| 584 | if (!(len%512)) |
| 585 | len++; |
| 586 | |
| 587 | usb_fill_bulk_urb(t->urb, |
| 588 | usbdev, |
| 589 | usb_sndbulkpipe(usbdev, 2), |
| 590 | t->buf, |
| 591 | len, |
| 592 | gdm_usb_send_complete, |
| 593 | t); |
| 594 | |
| 595 | ret = usb_submit_urb(t->urb, GFP_ATOMIC); |
| 596 | |
| 597 | if (ret) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 598 | pr_err("usb_submit_urb failed: %d\n", ret); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 599 | |
| 600 | usb_mark_last_busy(usbdev); |
| 601 | |
| 602 | return ret; |
| 603 | } |
| 604 | |
| 605 | static u32 packet_aggregation(struct lte_udev *udev, u8 *send_buf) |
| 606 | { |
| 607 | struct tx_cxt *tx = &udev->tx; |
| 608 | struct usb_tx_sdu *t_sdu = NULL; |
| 609 | struct multi_sdu *multi_sdu = (struct multi_sdu *)send_buf; |
| 610 | u16 send_len = 0; |
| 611 | u16 num_packet = 0; |
| 612 | unsigned long flags; |
| 613 | |
| 614 | multi_sdu->cmd_evt = gdm_cpu_to_dev16(&udev->gdm_ed, LTE_TX_MULTI_SDU); |
| 615 | |
| 616 | while (num_packet < MAX_PACKET_IN_MULTI_SDU) { |
| 617 | spin_lock_irqsave(&tx->lock, flags); |
| 618 | if (list_empty(&tx->sdu_list)) { |
| 619 | spin_unlock_irqrestore(&tx->lock, flags); |
| 620 | break; |
| 621 | } |
| 622 | |
| 623 | t_sdu = list_entry(tx->sdu_list.next, struct usb_tx_sdu, list); |
| 624 | if (send_len + t_sdu->len > MAX_SDU_SIZE) { |
| 625 | spin_unlock_irqrestore(&tx->lock, flags); |
| 626 | break; |
| 627 | } |
| 628 | |
| 629 | list_del(&t_sdu->list); |
| 630 | spin_unlock_irqrestore(&tx->lock, flags); |
| 631 | |
| 632 | memcpy(multi_sdu->data + send_len, t_sdu->buf, t_sdu->len); |
| 633 | |
| 634 | send_len += (t_sdu->len + 3) & 0xfffc; |
| 635 | num_packet++; |
| 636 | |
| 637 | if (tx->avail_count > 10) |
| 638 | t_sdu->callback(t_sdu->cb_data); |
| 639 | |
| 640 | spin_lock_irqsave(&tx->lock, flags); |
| 641 | put_tx_struct(tx, t_sdu); |
| 642 | spin_unlock_irqrestore(&tx->lock, flags); |
| 643 | } |
| 644 | |
| 645 | multi_sdu->len = gdm_cpu_to_dev16(&udev->gdm_ed, send_len); |
| 646 | multi_sdu->num_packet = gdm_cpu_to_dev16(&udev->gdm_ed, num_packet); |
| 647 | |
| 648 | return send_len + offsetof(struct multi_sdu, data); |
| 649 | } |
| 650 | |
| 651 | static void do_tx(struct work_struct *work) |
| 652 | { |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 653 | struct lte_udev *udev = |
| 654 | container_of(work, struct lte_udev, work_tx.work); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 655 | struct usb_device *usbdev = udev->usbdev; |
| 656 | struct tx_cxt *tx = &udev->tx; |
| 657 | struct usb_tx *t = NULL; |
| 658 | int is_send = 0; |
| 659 | u32 len = 0; |
| 660 | unsigned long flags; |
| 661 | |
| 662 | if (!usb_autopm_get_interface(udev->intf)) |
| 663 | usb_autopm_put_interface(udev->intf); |
| 664 | |
| 665 | if (udev->usb_state == PM_SUSPEND) |
| 666 | return; |
| 667 | |
| 668 | spin_lock_irqsave(&tx->lock, flags); |
| 669 | if (!udev->send_complete) { |
| 670 | spin_unlock_irqrestore(&tx->lock, flags); |
| 671 | return; |
| 672 | } else { |
| 673 | udev->send_complete = 0; |
| 674 | } |
| 675 | |
| 676 | if (!list_empty(&tx->hci_list)) { |
| 677 | t = list_entry(tx->hci_list.next, struct usb_tx, list); |
| 678 | list_del(&t->list); |
| 679 | len = t->len; |
| 680 | t->is_sdu = 0; |
| 681 | is_send = 1; |
| 682 | } else if (!list_empty(&tx->sdu_list)) { |
| 683 | if (udev->tx_stop) { |
| 684 | udev->send_complete = 1; |
| 685 | spin_unlock_irqrestore(&tx->lock, flags); |
| 686 | return; |
| 687 | } |
| 688 | |
| 689 | t = alloc_tx_struct(TX_BUF_SIZE); |
| 690 | t->callback = NULL; |
| 691 | t->tx = tx; |
| 692 | t->is_sdu = 1; |
| 693 | is_send = 1; |
| 694 | } |
| 695 | |
| 696 | if (!is_send) { |
| 697 | udev->send_complete = 1; |
| 698 | spin_unlock_irqrestore(&tx->lock, flags); |
| 699 | return; |
| 700 | } |
| 701 | spin_unlock_irqrestore(&tx->lock, flags); |
| 702 | |
| 703 | if (t->is_sdu) |
| 704 | len = packet_aggregation(udev, t->buf); |
| 705 | |
| 706 | if (send_tx_packet(usbdev, t, len)) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 707 | pr_err("send_tx_packet failed\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 708 | t->callback = NULL; |
| 709 | gdm_usb_send_complete(t->urb); |
| 710 | } |
| 711 | } |
| 712 | |
| 713 | #define SDU_PARAM_LEN 12 |
| 714 | static int gdm_usb_sdu_send(void *priv_dev, void *data, int len, |
| 715 | unsigned int dftEpsId, unsigned int epsId, |
| 716 | void (*cb)(void *data), void *cb_data, |
| 717 | int dev_idx, int nic_type) |
| 718 | { |
| 719 | struct lte_udev *udev = priv_dev; |
| 720 | struct tx_cxt *tx = &udev->tx; |
| 721 | struct usb_tx_sdu *t_sdu; |
| 722 | struct sdu *sdu = NULL; |
| 723 | unsigned long flags; |
| 724 | int no_spc = 0; |
| 725 | u16 send_len; |
| 726 | |
| 727 | if (!udev->usbdev) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 728 | pr_err("sdu send - invalid device\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 729 | return TX_NO_DEV; |
| 730 | } |
| 731 | |
| 732 | spin_lock_irqsave(&tx->lock, flags); |
| 733 | t_sdu = get_tx_sdu_struct(tx, &no_spc); |
| 734 | spin_unlock_irqrestore(&tx->lock, flags); |
| 735 | |
| 736 | if (t_sdu == NULL) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 737 | pr_err("sdu send - free list empty\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 738 | return TX_NO_SPC; |
| 739 | } |
| 740 | |
| 741 | sdu = (struct sdu *)t_sdu->buf; |
| 742 | sdu->cmd_evt = gdm_cpu_to_dev16(&udev->gdm_ed, LTE_TX_SDU); |
| 743 | if (nic_type == NIC_TYPE_ARP) { |
| 744 | send_len = len + SDU_PARAM_LEN; |
| 745 | memcpy(sdu->data, data, len); |
| 746 | } else { |
| 747 | send_len = len - ETH_HLEN; |
| 748 | send_len += SDU_PARAM_LEN; |
| 749 | memcpy(sdu->data, data+ETH_HLEN, len-ETH_HLEN); |
| 750 | } |
| 751 | |
| 752 | sdu->len = gdm_cpu_to_dev16(&udev->gdm_ed, send_len); |
| 753 | sdu->dftEpsId = gdm_cpu_to_dev32(&udev->gdm_ed, dftEpsId); |
| 754 | sdu->bearer_ID = gdm_cpu_to_dev32(&udev->gdm_ed, epsId); |
| 755 | sdu->nic_type = gdm_cpu_to_dev32(&udev->gdm_ed, nic_type); |
| 756 | |
| 757 | t_sdu->len = send_len + HCI_HEADER_SIZE; |
| 758 | t_sdu->callback = cb; |
| 759 | t_sdu->cb_data = cb_data; |
| 760 | |
| 761 | spin_lock_irqsave(&tx->lock, flags); |
| 762 | list_add_tail(&t_sdu->list, &tx->sdu_list); |
| 763 | queue_work(usb_tx_wq, &udev->work_tx.work); |
| 764 | spin_unlock_irqrestore(&tx->lock, flags); |
| 765 | |
| 766 | if (no_spc) |
| 767 | return TX_NO_BUFFER; |
| 768 | |
| 769 | return 0; |
| 770 | } |
| 771 | |
| 772 | static int gdm_usb_hci_send(void *priv_dev, void *data, int len, |
| 773 | void (*cb)(void *data), void *cb_data) |
| 774 | { |
| 775 | struct lte_udev *udev = priv_dev; |
| 776 | struct tx_cxt *tx = &udev->tx; |
| 777 | struct usb_tx *t; |
| 778 | unsigned long flags; |
| 779 | |
| 780 | if (!udev->usbdev) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 781 | pr_err("hci send - invalid device\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 782 | return -ENODEV; |
| 783 | } |
| 784 | |
| 785 | t = alloc_tx_struct(len); |
| 786 | if (t == NULL) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 787 | pr_err("hci_send - out of memory\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 788 | return -ENOMEM; |
| 789 | } |
| 790 | |
| 791 | memcpy(t->buf, data, len); |
| 792 | t->callback = cb; |
| 793 | t->cb_data = cb_data; |
| 794 | t->len = len; |
| 795 | t->tx = tx; |
| 796 | t->is_sdu = 0; |
| 797 | |
| 798 | spin_lock_irqsave(&tx->lock, flags); |
| 799 | list_add_tail(&t->list, &tx->hci_list); |
| 800 | queue_work(usb_tx_wq, &udev->work_tx.work); |
| 801 | spin_unlock_irqrestore(&tx->lock, flags); |
| 802 | |
| 803 | return 0; |
| 804 | } |
| 805 | |
| 806 | static struct gdm_endian *gdm_usb_get_endian(void *priv_dev) |
| 807 | { |
| 808 | struct lte_udev *udev = priv_dev; |
| 809 | |
| 810 | return &udev->gdm_ed; |
| 811 | } |
| 812 | |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 813 | static int gdm_usb_probe(struct usb_interface *intf, |
| 814 | const struct usb_device_id *id) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 815 | { |
| 816 | int ret = 0; |
| 817 | struct phy_dev *phy_dev = NULL; |
| 818 | struct lte_udev *udev = NULL; |
| 819 | u16 idVendor, idProduct; |
| 820 | int bInterfaceNumber; |
| 821 | struct usb_device *usbdev = interface_to_usbdev(intf); |
| 822 | |
| 823 | bInterfaceNumber = intf->cur_altsetting->desc.bInterfaceNumber; |
| 824 | idVendor = __le16_to_cpu(usbdev->descriptor.idVendor); |
| 825 | idProduct = __le16_to_cpu(usbdev->descriptor.idProduct); |
| 826 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 827 | pr_info("net vid = 0x%04x pid = 0x%04x\n", idVendor, idProduct); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 828 | |
| 829 | if (bInterfaceNumber > NETWORK_INTERFACE) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 830 | pr_info("not a network device\n"); |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 831 | return -ENODEV; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 832 | } |
| 833 | |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 834 | phy_dev = kzalloc(sizeof(struct phy_dev), GFP_KERNEL); |
| 835 | if (!phy_dev) |
| 836 | return -ENOMEM; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 837 | |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 838 | udev = kzalloc(sizeof(struct lte_udev), GFP_KERNEL); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 839 | if (!udev) { |
| 840 | ret = -ENOMEM; |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 841 | goto err_udev; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 842 | } |
| 843 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 844 | phy_dev->priv_dev = (void *)udev; |
| 845 | phy_dev->send_hci_func = gdm_usb_hci_send; |
| 846 | phy_dev->send_sdu_func = gdm_usb_sdu_send; |
| 847 | phy_dev->rcv_func = gdm_usb_recv; |
| 848 | phy_dev->get_endian = gdm_usb_get_endian; |
| 849 | |
| 850 | udev->usbdev = usbdev; |
| 851 | ret = init_usb(udev); |
| 852 | if (ret < 0) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 853 | pr_err("init_usb func failed\n"); |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 854 | goto err_init_usb; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 855 | } |
| 856 | udev->intf = intf; |
| 857 | |
| 858 | intf->needs_remote_wakeup = 1; |
| 859 | usb_enable_autosuspend(usbdev); |
| 860 | pm_runtime_set_autosuspend_delay(&usbdev->dev, AUTO_SUSPEND_TIMER); |
| 861 | |
Aybuke Ozdemir | 35db035 | 2014-03-14 23:55:05 +0200 | [diff] [blame^] | 862 | /* List up hosts with big endians, otherwise, |
| 863 | * defaults to little endian |
| 864 | */ |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 865 | if (idProduct == PID_GDM7243) |
Won Kang | 9c02d0d | 2013-07-27 15:42:18 +0900 | [diff] [blame] | 866 | gdm_set_endian(&udev->gdm_ed, ENDIANNESS_BIG); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 867 | else |
Won Kang | 9c02d0d | 2013-07-27 15:42:18 +0900 | [diff] [blame] | 868 | gdm_set_endian(&udev->gdm_ed, ENDIANNESS_LITTLE); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 869 | |
| 870 | ret = request_mac_address(udev); |
| 871 | if (ret < 0) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 872 | pr_err("request Mac address failed\n"); |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 873 | goto err_mac_address; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 874 | } |
| 875 | |
| 876 | start_rx_proc(phy_dev); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 877 | usb_get_dev(usbdev); |
| 878 | usb_set_intfdata(intf, phy_dev); |
| 879 | |
Alexey Khoroshilov | a34c72b | 2013-11-16 00:46:24 +0400 | [diff] [blame] | 880 | return 0; |
| 881 | |
| 882 | err_mac_address: |
| 883 | release_usb(udev); |
| 884 | err_init_usb: |
| 885 | kfree(udev); |
| 886 | err_udev: |
| 887 | kfree(phy_dev); |
| 888 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 889 | return ret; |
| 890 | } |
| 891 | |
| 892 | static void gdm_usb_disconnect(struct usb_interface *intf) |
| 893 | { |
| 894 | struct phy_dev *phy_dev; |
| 895 | struct lte_udev *udev; |
| 896 | u16 idVendor, idProduct; |
| 897 | struct usb_device *usbdev; |
| 898 | usbdev = interface_to_usbdev(intf); |
| 899 | |
| 900 | idVendor = __le16_to_cpu(usbdev->descriptor.idVendor); |
| 901 | idProduct = __le16_to_cpu(usbdev->descriptor.idProduct); |
| 902 | |
| 903 | phy_dev = usb_get_intfdata(intf); |
| 904 | |
| 905 | udev = phy_dev->priv_dev; |
| 906 | unregister_lte_device(phy_dev); |
| 907 | |
| 908 | release_usb(udev); |
| 909 | |
| 910 | kfree(udev); |
| 911 | udev = NULL; |
| 912 | |
| 913 | kfree(phy_dev); |
| 914 | phy_dev = NULL; |
| 915 | |
| 916 | usb_put_dev(usbdev); |
| 917 | } |
| 918 | |
| 919 | static int gdm_usb_suspend(struct usb_interface *intf, pm_message_t pm_msg) |
| 920 | { |
| 921 | struct phy_dev *phy_dev; |
| 922 | struct lte_udev *udev; |
| 923 | struct rx_cxt *rx; |
| 924 | struct usb_rx *r; |
| 925 | struct usb_rx *r_next; |
| 926 | unsigned long flags; |
| 927 | |
| 928 | phy_dev = usb_get_intfdata(intf); |
| 929 | udev = phy_dev->priv_dev; |
| 930 | rx = &udev->rx; |
| 931 | if (udev->usb_state != PM_NORMAL) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 932 | pr_err("usb suspend - invalid state\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 933 | return -1; |
| 934 | } |
| 935 | |
| 936 | udev->usb_state = PM_SUSPEND; |
| 937 | |
| 938 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 939 | list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, rx_submit_list) |
| 940 | { |
| 941 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 942 | usb_kill_urb(r->urb); |
| 943 | spin_lock_irqsave(&rx->submit_lock, flags); |
| 944 | } |
| 945 | spin_unlock_irqrestore(&rx->submit_lock, flags); |
| 946 | |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | static int gdm_usb_resume(struct usb_interface *intf) |
| 951 | { |
| 952 | struct phy_dev *phy_dev; |
| 953 | struct lte_udev *udev; |
| 954 | struct tx_cxt *tx; |
| 955 | struct rx_cxt *rx; |
| 956 | unsigned long flags; |
| 957 | int issue_count; |
| 958 | int i; |
| 959 | |
| 960 | phy_dev = usb_get_intfdata(intf); |
| 961 | udev = phy_dev->priv_dev; |
| 962 | rx = &udev->rx; |
| 963 | |
| 964 | if (udev->usb_state != PM_SUSPEND) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 965 | pr_err("usb resume - invalid state\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 966 | return -1; |
| 967 | } |
| 968 | udev->usb_state = PM_NORMAL; |
| 969 | |
| 970 | spin_lock_irqsave(&rx->rx_lock, flags); |
| 971 | issue_count = rx->avail_count - MAX_RX_SUBMIT_COUNT; |
| 972 | spin_unlock_irqrestore(&rx->rx_lock, flags); |
| 973 | |
| 974 | if (issue_count >= 0) { |
| 975 | for (i = 0; i < issue_count; i++) |
| 976 | gdm_usb_recv(phy_dev->priv_dev, |
| 977 | udev->rx_cb, |
| 978 | phy_dev, |
| 979 | USB_COMPLETE); |
| 980 | } |
| 981 | |
| 982 | tx = &udev->tx; |
| 983 | spin_lock_irqsave(&tx->lock, flags); |
| 984 | queue_work(usb_tx_wq, &udev->work_tx.work); |
| 985 | spin_unlock_irqrestore(&tx->lock, flags); |
| 986 | |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | static struct usb_driver gdm_usb_lte_driver = { |
| 991 | .name = "gdm_lte", |
| 992 | .probe = gdm_usb_probe, |
| 993 | .disconnect = gdm_usb_disconnect, |
| 994 | .id_table = id_table, |
| 995 | .supports_autosuspend = 1, |
| 996 | .suspend = gdm_usb_suspend, |
| 997 | .resume = gdm_usb_resume, |
| 998 | .reset_resume = gdm_usb_resume, |
| 999 | }; |
| 1000 | |
| 1001 | static int __init gdm_usb_lte_init(void) |
| 1002 | { |
| 1003 | if (gdm_lte_event_init() < 0) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 1004 | pr_err("error creating event\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 1005 | return -1; |
| 1006 | } |
| 1007 | |
| 1008 | usb_tx_wq = create_workqueue("usb_tx_wq"); |
| 1009 | if (usb_tx_wq == NULL) |
| 1010 | return -1; |
| 1011 | |
| 1012 | usb_rx_wq = create_workqueue("usb_rx_wq"); |
| 1013 | if (usb_rx_wq == NULL) |
| 1014 | return -1; |
| 1015 | |
| 1016 | return usb_register(&gdm_usb_lte_driver); |
| 1017 | } |
| 1018 | |
| 1019 | static void __exit gdm_usb_lte_exit(void) |
| 1020 | { |
| 1021 | gdm_lte_event_exit(); |
| 1022 | |
| 1023 | usb_deregister(&gdm_usb_lte_driver); |
| 1024 | |
| 1025 | if (usb_tx_wq) { |
| 1026 | flush_workqueue(usb_tx_wq); |
| 1027 | destroy_workqueue(usb_tx_wq); |
| 1028 | } |
| 1029 | |
| 1030 | if (usb_rx_wq) { |
| 1031 | flush_workqueue(usb_rx_wq); |
| 1032 | destroy_workqueue(usb_rx_wq); |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | module_init(gdm_usb_lte_init); |
| 1037 | module_exit(gdm_usb_lte_exit); |
| 1038 | |
| 1039 | MODULE_VERSION(DRIVER_VERSION); |
| 1040 | MODULE_DESCRIPTION("GCT LTE USB Device Driver"); |
| 1041 | MODULE_LICENSE("GPL"); |