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/errno.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/tty.h> |
| 22 | #include <linux/tty_driver.h> |
| 23 | #include <linux/tty_flip.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/usb/cdc.h> |
| 26 | |
| 27 | #include "gdm_mux.h" |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 28 | |
Valentina Manea | ff52b8f | 2013-10-08 13:21:26 +0300 | [diff] [blame] | 29 | static struct workqueue_struct *mux_rx_wq; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 30 | |
| 31 | static u16 packet_type[TTY_MAX_COUNT] = {0xF011, 0xF010}; |
| 32 | |
| 33 | #define USB_DEVICE_CDC_DATA(vid, pid) \ |
| 34 | .match_flags = \ |
| 35 | USB_DEVICE_ID_MATCH_DEVICE |\ |
| 36 | USB_DEVICE_ID_MATCH_INT_CLASS |\ |
| 37 | USB_DEVICE_ID_MATCH_INT_SUBCLASS,\ |
| 38 | .idVendor = vid,\ |
| 39 | .idProduct = pid,\ |
| 40 | .bInterfaceClass = USB_CLASS_COMM,\ |
| 41 | .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM |
| 42 | |
| 43 | static const struct usb_device_id id_table[] = { |
| 44 | { USB_DEVICE_CDC_DATA(0x1076, 0x8000) }, /* GCT GDM7240 */ |
| 45 | { USB_DEVICE_CDC_DATA(0x1076, 0x8f00) }, /* GCT GDM7243 */ |
| 46 | { USB_DEVICE_CDC_DATA(0x1076, 0x9000) }, /* GCT GDM7243 */ |
| 47 | { USB_DEVICE_CDC_DATA(0x1d74, 0x2300) }, /* LGIT Phoenix */ |
| 48 | {} |
| 49 | }; |
| 50 | |
| 51 | |
| 52 | MODULE_DEVICE_TABLE(usb, id_table); |
| 53 | |
Valentina Manea | ff52b8f | 2013-10-08 13:21:26 +0300 | [diff] [blame] | 54 | static int packet_type_to_index(u16 packetType) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 55 | { |
| 56 | int i; |
| 57 | |
| 58 | for (i = 0; i < TTY_MAX_COUNT; i++) { |
| 59 | if (packet_type[i] == packetType) |
| 60 | return i; |
| 61 | } |
| 62 | |
| 63 | return -1; |
| 64 | } |
| 65 | |
| 66 | static struct mux_tx *alloc_mux_tx(int len) |
| 67 | { |
| 68 | struct mux_tx *t = NULL; |
| 69 | |
| 70 | t = kzalloc(sizeof(struct mux_tx), GFP_ATOMIC); |
| 71 | if (!t) |
| 72 | return NULL; |
| 73 | |
| 74 | t->urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 75 | t->buf = kmalloc(MUX_TX_MAX_SIZE, GFP_ATOMIC); |
| 76 | if (!t->urb || !t->buf) { |
| 77 | usb_free_urb(t->urb); |
| 78 | kfree(t->buf); |
| 79 | kfree(t); |
| 80 | return NULL; |
| 81 | } |
| 82 | |
| 83 | return t; |
| 84 | } |
| 85 | |
| 86 | static void free_mux_tx(struct mux_tx *t) |
| 87 | { |
| 88 | if (t) { |
| 89 | usb_free_urb(t->urb); |
| 90 | kfree(t->buf); |
| 91 | kfree(t); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | static struct mux_rx *alloc_mux_rx(void) |
| 96 | { |
| 97 | struct mux_rx *r = NULL; |
| 98 | |
Alexey Khoroshilov | a4d8c83 | 2013-10-09 00:50:15 +0400 | [diff] [blame] | 99 | r = kzalloc(sizeof(struct mux_rx), GFP_KERNEL); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 100 | if (!r) |
| 101 | return NULL; |
| 102 | |
Alexey Khoroshilov | a4d8c83 | 2013-10-09 00:50:15 +0400 | [diff] [blame] | 103 | r->urb = usb_alloc_urb(0, GFP_KERNEL); |
| 104 | r->buf = kmalloc(MUX_RX_MAX_SIZE, GFP_KERNEL); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 105 | if (!r->urb || !r->buf) { |
| 106 | usb_free_urb(r->urb); |
| 107 | kfree(r->buf); |
| 108 | kfree(r); |
| 109 | return NULL; |
| 110 | } |
| 111 | |
| 112 | return r; |
| 113 | } |
| 114 | |
| 115 | static void free_mux_rx(struct mux_rx *r) |
| 116 | { |
| 117 | if (r) { |
| 118 | usb_free_urb(r->urb); |
| 119 | kfree(r->buf); |
| 120 | kfree(r); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | static struct mux_rx *get_rx_struct(struct rx_cxt *rx) |
| 125 | { |
| 126 | struct mux_rx *r; |
| 127 | unsigned long flags; |
| 128 | |
| 129 | spin_lock_irqsave(&rx->free_list_lock, flags); |
| 130 | |
| 131 | if (list_empty(&rx->rx_free_list)) { |
| 132 | spin_unlock_irqrestore(&rx->free_list_lock, flags); |
| 133 | return NULL; |
| 134 | } |
| 135 | |
| 136 | r = list_entry(rx->rx_free_list.prev, struct mux_rx, free_list); |
| 137 | list_del(&r->free_list); |
| 138 | |
| 139 | spin_unlock_irqrestore(&rx->free_list_lock, flags); |
| 140 | |
| 141 | return r; |
| 142 | } |
| 143 | |
| 144 | static void put_rx_struct(struct rx_cxt *rx, struct mux_rx *r) |
| 145 | { |
| 146 | unsigned long flags; |
| 147 | |
| 148 | spin_lock_irqsave(&rx->free_list_lock, flags); |
| 149 | list_add_tail(&r->free_list, &rx->rx_free_list); |
| 150 | spin_unlock_irqrestore(&rx->free_list_lock, flags); |
| 151 | } |
| 152 | |
| 153 | |
| 154 | static int up_to_host(struct mux_rx *r) |
| 155 | { |
| 156 | struct mux_dev *mux_dev = (struct mux_dev *)r->mux_dev; |
| 157 | struct mux_pkt_header *mux_header; |
| 158 | unsigned int start_flag; |
| 159 | unsigned int payload_size; |
| 160 | unsigned short packet_type; |
SÅ‚awomir Demeszko | 892c89d | 2015-05-05 17:49:54 +0200 | [diff] [blame] | 161 | int total_len; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 162 | u32 packet_size_sum = r->offset; |
| 163 | int index; |
| 164 | int ret = TO_HOST_INVALID_PACKET; |
| 165 | int len = r->len; |
| 166 | |
| 167 | while (1) { |
Daniel Ngu | 7b99b5e | 2014-03-17 08:17:28 +1300 | [diff] [blame] | 168 | mux_header = (struct mux_pkt_header *)(r->buf + |
| 169 | packet_size_sum); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 170 | start_flag = __le32_to_cpu(mux_header->start_flag); |
| 171 | payload_size = __le32_to_cpu(mux_header->payload_size); |
| 172 | packet_type = __le16_to_cpu(mux_header->packet_type); |
| 173 | |
| 174 | if (start_flag != START_FLAG) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 175 | pr_err("invalid START_FLAG %x\n", start_flag); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 176 | break; |
| 177 | } |
| 178 | |
SÅ‚awomir Demeszko | 892c89d | 2015-05-05 17:49:54 +0200 | [diff] [blame] | 179 | total_len = ALIGN(MUX_HEADER_SIZE + payload_size, 4); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 180 | |
| 181 | if (len - packet_size_sum < |
SÅ‚awomir Demeszko | 892c89d | 2015-05-05 17:49:54 +0200 | [diff] [blame] | 182 | total_len) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 183 | pr_err("invalid payload : %d %d %04x\n", |
| 184 | payload_size, len, packet_type); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 185 | break; |
| 186 | } |
| 187 | |
| 188 | index = packet_type_to_index(packet_type); |
| 189 | if (index < 0) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 190 | pr_err("invalid index %d\n", index); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 191 | break; |
| 192 | } |
| 193 | |
| 194 | ret = r->callback(mux_header->data, |
| 195 | payload_size, |
| 196 | index, |
Won Kang | bf0373f | 2013-08-16 13:13:44 +0900 | [diff] [blame] | 197 | mux_dev->tty_dev, |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 198 | RECV_PACKET_PROCESS_CONTINUE |
| 199 | ); |
| 200 | if (ret == TO_HOST_BUFFER_REQUEST_FAIL) { |
| 201 | r->offset += packet_size_sum; |
| 202 | break; |
| 203 | } |
| 204 | |
SÅ‚awomir Demeszko | 892c89d | 2015-05-05 17:49:54 +0200 | [diff] [blame] | 205 | packet_size_sum += total_len; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 206 | if (len - packet_size_sum <= MUX_HEADER_SIZE + 2) { |
| 207 | ret = r->callback(NULL, |
| 208 | 0, |
| 209 | index, |
Won Kang | bf0373f | 2013-08-16 13:13:44 +0900 | [diff] [blame] | 210 | mux_dev->tty_dev, |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 211 | RECV_PACKET_PROCESS_COMPLETE |
| 212 | ); |
| 213 | break; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | return ret; |
| 218 | } |
| 219 | |
| 220 | static void do_rx(struct work_struct *work) |
| 221 | { |
| 222 | struct mux_dev *mux_dev = |
Robert Nachlinger | 2fc6aa5 | 2014-12-18 17:57:06 +0100 | [diff] [blame] | 223 | container_of(work, struct mux_dev, work_rx.work); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 224 | struct mux_rx *r; |
| 225 | struct rx_cxt *rx = (struct rx_cxt *)&mux_dev->rx; |
| 226 | unsigned long flags; |
| 227 | int ret = 0; |
| 228 | |
| 229 | while (1) { |
| 230 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 231 | if (list_empty(&rx->to_host_list)) { |
| 232 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 233 | break; |
| 234 | } |
Daniel Ngu | 7b99b5e | 2014-03-17 08:17:28 +1300 | [diff] [blame] | 235 | r = list_entry(rx->to_host_list.next, struct mux_rx, |
| 236 | to_host_list); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 237 | list_del(&r->to_host_list); |
| 238 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 239 | |
| 240 | ret = up_to_host(r); |
| 241 | if (ret == TO_HOST_BUFFER_REQUEST_FAIL) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 242 | pr_err("failed to send mux data to host\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 243 | else |
| 244 | put_rx_struct(rx, r); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | static void remove_rx_submit_list(struct mux_rx *r, struct rx_cxt *rx) |
| 249 | { |
| 250 | unsigned long flags; |
| 251 | struct mux_rx *r_remove, *r_remove_next; |
| 252 | |
| 253 | spin_lock_irqsave(&rx->submit_list_lock, flags); |
Daniel Ngu | 7b99b5e | 2014-03-17 08:17:28 +1300 | [diff] [blame] | 254 | list_for_each_entry_safe(r_remove, r_remove_next, &rx->rx_submit_list, |
| 255 | rx_submit_list) { |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 256 | if (r == r_remove) |
| 257 | list_del(&r->rx_submit_list); |
| 258 | } |
| 259 | spin_unlock_irqrestore(&rx->submit_list_lock, flags); |
| 260 | } |
| 261 | |
| 262 | static void gdm_mux_rcv_complete(struct urb *urb) |
| 263 | { |
| 264 | struct mux_rx *r = urb->context; |
| 265 | struct mux_dev *mux_dev = (struct mux_dev *)r->mux_dev; |
| 266 | struct rx_cxt *rx = &mux_dev->rx; |
| 267 | unsigned long flags; |
| 268 | |
| 269 | remove_rx_submit_list(r, rx); |
| 270 | |
| 271 | if (urb->status) { |
| 272 | if (mux_dev->usb_state == PM_NORMAL) |
Haneen Mohammed | 3d71942 | 2015-03-18 13:08:59 +0300 | [diff] [blame] | 273 | dev_err(&urb->dev->dev, "%s: urb status error %d\n", |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 274 | __func__, urb->status); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 275 | put_rx_struct(rx, r); |
| 276 | } else { |
| 277 | r->len = r->urb->actual_length; |
| 278 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 279 | list_add_tail(&r->to_host_list, &rx->to_host_list); |
| 280 | queue_work(mux_rx_wq, &mux_dev->work_rx.work); |
| 281 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 282 | } |
| 283 | } |
| 284 | |
Daniel Ngu | 7b99b5e | 2014-03-17 08:17:28 +1300 | [diff] [blame] | 285 | static int gdm_mux_recv(void *priv_dev, int (*cb)(void *data, int len, |
| 286 | int tty_index, struct tty_dev *tty_dev, int complete)) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 287 | { |
| 288 | struct mux_dev *mux_dev = priv_dev; |
| 289 | struct usb_device *usbdev = mux_dev->usbdev; |
| 290 | struct mux_rx *r; |
| 291 | struct rx_cxt *rx = &mux_dev->rx; |
| 292 | unsigned long flags; |
| 293 | int ret; |
| 294 | |
| 295 | if (!usbdev) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 296 | pr_err("device is disconnected\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 297 | return -ENODEV; |
| 298 | } |
| 299 | |
| 300 | r = get_rx_struct(rx); |
| 301 | if (!r) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 302 | pr_err("get_rx_struct fail\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 303 | return -ENOMEM; |
| 304 | } |
| 305 | |
| 306 | r->offset = 0; |
| 307 | r->mux_dev = (void *)mux_dev; |
| 308 | r->callback = cb; |
| 309 | mux_dev->rx_cb = cb; |
| 310 | |
| 311 | usb_fill_bulk_urb(r->urb, |
| 312 | usbdev, |
| 313 | usb_rcvbulkpipe(usbdev, 0x86), |
| 314 | r->buf, |
| 315 | MUX_RX_MAX_SIZE, |
| 316 | gdm_mux_rcv_complete, |
| 317 | r); |
| 318 | |
| 319 | spin_lock_irqsave(&rx->submit_list_lock, flags); |
| 320 | list_add_tail(&r->rx_submit_list, &rx->rx_submit_list); |
| 321 | spin_unlock_irqrestore(&rx->submit_list_lock, flags); |
| 322 | |
| 323 | ret = usb_submit_urb(r->urb, GFP_KERNEL); |
| 324 | |
| 325 | if (ret) { |
| 326 | spin_lock_irqsave(&rx->submit_list_lock, flags); |
| 327 | list_del(&r->rx_submit_list); |
| 328 | spin_unlock_irqrestore(&rx->submit_list_lock, flags); |
| 329 | |
| 330 | put_rx_struct(rx, r); |
| 331 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 332 | pr_err("usb_submit_urb ret=%d\n", ret); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | usb_mark_last_busy(usbdev); |
| 336 | |
| 337 | return ret; |
| 338 | } |
| 339 | |
| 340 | static void gdm_mux_send_complete(struct urb *urb) |
| 341 | { |
| 342 | struct mux_tx *t = urb->context; |
| 343 | |
| 344 | if (urb->status == -ECONNRESET) { |
Haneen Mohammed | 3d71942 | 2015-03-18 13:08:59 +0300 | [diff] [blame] | 345 | dev_info(&urb->dev->dev, "CONNRESET\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 346 | free_mux_tx(t); |
| 347 | return; |
| 348 | } |
| 349 | |
| 350 | if (t->callback) |
| 351 | t->callback(t->cb_data); |
| 352 | |
| 353 | free_mux_tx(t); |
| 354 | } |
| 355 | |
| 356 | static int gdm_mux_send(void *priv_dev, void *data, int len, int tty_index, |
| 357 | void (*cb)(void *data), void *cb_data) |
| 358 | { |
| 359 | struct mux_dev *mux_dev = priv_dev; |
| 360 | struct usb_device *usbdev = mux_dev->usbdev; |
| 361 | struct mux_pkt_header *mux_header; |
| 362 | struct mux_tx *t = NULL; |
| 363 | static u32 seq_num = 1; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 364 | int total_len; |
| 365 | int ret; |
| 366 | unsigned long flags; |
| 367 | |
| 368 | if (mux_dev->usb_state == PM_SUSPEND) { |
| 369 | ret = usb_autopm_get_interface(mux_dev->intf); |
| 370 | if (!ret) |
| 371 | usb_autopm_put_interface(mux_dev->intf); |
| 372 | } |
| 373 | |
| 374 | spin_lock_irqsave(&mux_dev->write_lock, flags); |
| 375 | |
SÅ‚awomir Demeszko | 892c89d | 2015-05-05 17:49:54 +0200 | [diff] [blame] | 376 | total_len = ALIGN(MUX_HEADER_SIZE + len, 4); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 377 | |
| 378 | t = alloc_mux_tx(total_len); |
| 379 | if (!t) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 380 | pr_err("alloc_mux_tx fail\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 381 | spin_unlock_irqrestore(&mux_dev->write_lock, flags); |
| 382 | return -ENOMEM; |
| 383 | } |
| 384 | |
| 385 | mux_header = (struct mux_pkt_header *)t->buf; |
| 386 | mux_header->start_flag = __cpu_to_le32(START_FLAG); |
| 387 | mux_header->seq_num = __cpu_to_le32(seq_num++); |
| 388 | mux_header->payload_size = __cpu_to_le32((u32)len); |
| 389 | mux_header->packet_type = __cpu_to_le16(packet_type[tty_index]); |
| 390 | |
| 391 | memcpy(t->buf+MUX_HEADER_SIZE, data, len); |
SÅ‚awomir Demeszko | 892c89d | 2015-05-05 17:49:54 +0200 | [diff] [blame] | 392 | memset(t->buf+MUX_HEADER_SIZE+len, 0, total_len - MUX_HEADER_SIZE - |
| 393 | len); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 394 | |
| 395 | t->len = total_len; |
| 396 | t->callback = cb; |
| 397 | t->cb_data = cb_data; |
| 398 | |
| 399 | usb_fill_bulk_urb(t->urb, |
| 400 | usbdev, |
| 401 | usb_sndbulkpipe(usbdev, 5), |
| 402 | t->buf, |
| 403 | total_len, |
| 404 | gdm_mux_send_complete, |
| 405 | t); |
| 406 | |
Wei Yongjun | b07dee7 | 2013-07-26 10:15:55 +0800 | [diff] [blame] | 407 | ret = usb_submit_urb(t->urb, GFP_ATOMIC); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 408 | |
| 409 | spin_unlock_irqrestore(&mux_dev->write_lock, flags); |
| 410 | |
| 411 | if (ret) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 412 | pr_err("usb_submit_urb Error: %d\n", ret); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 413 | |
| 414 | usb_mark_last_busy(usbdev); |
| 415 | |
| 416 | return ret; |
| 417 | } |
| 418 | |
Daniel Ngu | 7b99b5e | 2014-03-17 08:17:28 +1300 | [diff] [blame] | 419 | static int gdm_mux_send_control(void *priv_dev, int request, int value, |
| 420 | void *buf, int len) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 421 | { |
| 422 | struct mux_dev *mux_dev = priv_dev; |
| 423 | struct usb_device *usbdev = mux_dev->usbdev; |
| 424 | int ret; |
| 425 | |
| 426 | ret = usb_control_msg(usbdev, |
| 427 | usb_sndctrlpipe(usbdev, 0), |
| 428 | request, |
| 429 | USB_RT_ACM, |
| 430 | value, |
| 431 | 2, |
| 432 | buf, |
| 433 | len, |
| 434 | 5000 |
| 435 | ); |
| 436 | |
| 437 | if (ret < 0) |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 438 | pr_err("usb_control_msg error: %d\n", ret); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 439 | |
| 440 | return ret < 0 ? ret : 0; |
| 441 | } |
| 442 | |
| 443 | static void release_usb(struct mux_dev *mux_dev) |
| 444 | { |
| 445 | struct rx_cxt *rx = &mux_dev->rx; |
| 446 | struct mux_rx *r, *r_next; |
| 447 | unsigned long flags; |
| 448 | |
| 449 | cancel_delayed_work(&mux_dev->work_rx); |
| 450 | |
| 451 | spin_lock_irqsave(&rx->submit_list_lock, flags); |
Daniel Ngu | 7b99b5e | 2014-03-17 08:17:28 +1300 | [diff] [blame] | 452 | list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, |
| 453 | rx_submit_list) { |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 454 | spin_unlock_irqrestore(&rx->submit_list_lock, flags); |
| 455 | usb_kill_urb(r->urb); |
| 456 | spin_lock_irqsave(&rx->submit_list_lock, flags); |
| 457 | } |
| 458 | spin_unlock_irqrestore(&rx->submit_list_lock, flags); |
| 459 | |
| 460 | spin_lock_irqsave(&rx->free_list_lock, flags); |
| 461 | list_for_each_entry_safe(r, r_next, &rx->rx_free_list, free_list) { |
| 462 | list_del(&r->free_list); |
| 463 | free_mux_rx(r); |
| 464 | } |
| 465 | spin_unlock_irqrestore(&rx->free_list_lock, flags); |
| 466 | |
| 467 | spin_lock_irqsave(&rx->to_host_lock, flags); |
| 468 | list_for_each_entry_safe(r, r_next, &rx->to_host_list, to_host_list) { |
| 469 | if (r->mux_dev == (void *)mux_dev) { |
| 470 | list_del(&r->to_host_list); |
| 471 | free_mux_rx(r); |
| 472 | } |
| 473 | } |
| 474 | spin_unlock_irqrestore(&rx->to_host_lock, flags); |
| 475 | } |
| 476 | |
| 477 | |
| 478 | static int init_usb(struct mux_dev *mux_dev) |
| 479 | { |
| 480 | struct mux_rx *r; |
| 481 | struct rx_cxt *rx = &mux_dev->rx; |
| 482 | int ret = 0; |
| 483 | int i; |
| 484 | |
| 485 | spin_lock_init(&mux_dev->write_lock); |
| 486 | INIT_LIST_HEAD(&rx->to_host_list); |
| 487 | INIT_LIST_HEAD(&rx->rx_submit_list); |
| 488 | INIT_LIST_HEAD(&rx->rx_free_list); |
| 489 | spin_lock_init(&rx->to_host_lock); |
| 490 | spin_lock_init(&rx->submit_list_lock); |
| 491 | spin_lock_init(&rx->free_list_lock); |
| 492 | |
| 493 | for (i = 0; i < MAX_ISSUE_NUM * 2; i++) { |
| 494 | r = alloc_mux_rx(); |
| 495 | if (r == NULL) { |
| 496 | ret = -ENOMEM; |
| 497 | break; |
| 498 | } |
| 499 | |
| 500 | list_add(&r->free_list, &rx->rx_free_list); |
| 501 | } |
| 502 | |
| 503 | INIT_DELAYED_WORK(&mux_dev->work_rx, do_rx); |
| 504 | |
| 505 | return ret; |
| 506 | } |
| 507 | |
Daniel Ngu | 7b99b5e | 2014-03-17 08:17:28 +1300 | [diff] [blame] | 508 | static int gdm_mux_probe(struct usb_interface *intf, |
| 509 | const struct usb_device_id *id) |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 510 | { |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 511 | struct mux_dev *mux_dev; |
| 512 | struct tty_dev *tty_dev; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 513 | u16 idVendor, idProduct; |
| 514 | int bInterfaceNumber; |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 515 | int ret; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 516 | int i; |
| 517 | struct usb_device *usbdev = interface_to_usbdev(intf); |
Gulsah Kose | 37d963f | 2014-09-20 20:43:53 +0300 | [diff] [blame] | 518 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 519 | bInterfaceNumber = intf->cur_altsetting->desc.bInterfaceNumber; |
| 520 | |
| 521 | idVendor = __le16_to_cpu(usbdev->descriptor.idVendor); |
| 522 | idProduct = __le16_to_cpu(usbdev->descriptor.idProduct); |
| 523 | |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 524 | pr_info("mux vid = 0x%04x pid = 0x%04x\n", idVendor, idProduct); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 525 | |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 526 | if (bInterfaceNumber != 2) |
| 527 | return -ENODEV; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 528 | |
| 529 | mux_dev = kzalloc(sizeof(struct mux_dev), GFP_KERNEL); |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 530 | if (!mux_dev) |
| 531 | return -ENOMEM; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 532 | |
| 533 | tty_dev = kzalloc(sizeof(struct tty_dev), GFP_KERNEL); |
| 534 | if (!tty_dev) { |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 535 | ret = -ENOMEM; |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 536 | goto err_free_mux; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | mux_dev->usbdev = usbdev; |
| 540 | mux_dev->control_intf = intf; |
| 541 | |
| 542 | ret = init_usb(mux_dev); |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 543 | if (ret) |
Alexey Khoroshilov | 4705257 | 2013-10-09 00:50:16 +0400 | [diff] [blame] | 544 | goto err_free_usb; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 545 | |
| 546 | tty_dev->priv_dev = (void *)mux_dev; |
| 547 | tty_dev->send_func = gdm_mux_send; |
| 548 | tty_dev->recv_func = gdm_mux_recv; |
| 549 | tty_dev->send_control = gdm_mux_send_control; |
| 550 | |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 551 | ret = register_lte_tty_device(tty_dev, &intf->dev); |
| 552 | if (ret) |
| 553 | goto err_unregister_tty; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 554 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 555 | for (i = 0; i < TTY_MAX_COUNT; i++) |
Won Kang | bf0373f | 2013-08-16 13:13:44 +0900 | [diff] [blame] | 556 | mux_dev->tty_dev = tty_dev; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 557 | |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 558 | mux_dev->intf = intf; |
| 559 | mux_dev->usb_state = PM_NORMAL; |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 560 | |
| 561 | usb_get_dev(usbdev); |
| 562 | usb_set_intfdata(intf, tty_dev); |
| 563 | |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 564 | return 0; |
| 565 | |
| 566 | err_unregister_tty: |
| 567 | unregister_lte_tty_device(tty_dev); |
Alexey Khoroshilov | 4705257 | 2013-10-09 00:50:16 +0400 | [diff] [blame] | 568 | err_free_usb: |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 569 | release_usb(mux_dev); |
Dan Carpenter | 234ad18 | 2013-08-21 11:31:18 +0300 | [diff] [blame] | 570 | kfree(tty_dev); |
| 571 | err_free_mux: |
| 572 | kfree(mux_dev); |
| 573 | |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 574 | return ret; |
| 575 | } |
| 576 | |
| 577 | static void gdm_mux_disconnect(struct usb_interface *intf) |
| 578 | { |
| 579 | struct tty_dev *tty_dev; |
| 580 | struct mux_dev *mux_dev; |
| 581 | struct usb_device *usbdev = interface_to_usbdev(intf); |
| 582 | |
| 583 | tty_dev = usb_get_intfdata(intf); |
| 584 | |
| 585 | mux_dev = tty_dev->priv_dev; |
| 586 | |
| 587 | release_usb(mux_dev); |
| 588 | unregister_lte_tty_device(tty_dev); |
| 589 | |
| 590 | kfree(mux_dev); |
| 591 | kfree(tty_dev); |
| 592 | |
| 593 | usb_put_dev(usbdev); |
| 594 | } |
| 595 | |
| 596 | static int gdm_mux_suspend(struct usb_interface *intf, pm_message_t pm_msg) |
| 597 | { |
| 598 | struct tty_dev *tty_dev; |
| 599 | struct mux_dev *mux_dev; |
| 600 | struct rx_cxt *rx; |
| 601 | struct mux_rx *r, *r_next; |
| 602 | unsigned long flags; |
| 603 | |
| 604 | tty_dev = usb_get_intfdata(intf); |
| 605 | mux_dev = tty_dev->priv_dev; |
| 606 | rx = &mux_dev->rx; |
| 607 | |
| 608 | if (mux_dev->usb_state != PM_NORMAL) { |
Haneen Mohammed | df02b50 | 2015-03-17 08:34:20 +0300 | [diff] [blame] | 609 | dev_err(intf->usb_dev, "usb suspend - invalid state\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 610 | return -1; |
| 611 | } |
| 612 | |
| 613 | mux_dev->usb_state = PM_SUSPEND; |
| 614 | |
| 615 | |
| 616 | spin_lock_irqsave(&rx->submit_list_lock, flags); |
Daniel Ngu | 7b99b5e | 2014-03-17 08:17:28 +1300 | [diff] [blame] | 617 | list_for_each_entry_safe(r, r_next, &rx->rx_submit_list, |
| 618 | rx_submit_list) { |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 619 | spin_unlock_irqrestore(&rx->submit_list_lock, flags); |
| 620 | usb_kill_urb(r->urb); |
| 621 | spin_lock_irqsave(&rx->submit_list_lock, flags); |
| 622 | } |
| 623 | spin_unlock_irqrestore(&rx->submit_list_lock, flags); |
| 624 | |
| 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | static int gdm_mux_resume(struct usb_interface *intf) |
| 629 | { |
| 630 | struct tty_dev *tty_dev; |
| 631 | struct mux_dev *mux_dev; |
| 632 | u8 i; |
| 633 | |
| 634 | tty_dev = usb_get_intfdata(intf); |
| 635 | mux_dev = tty_dev->priv_dev; |
| 636 | |
| 637 | if (mux_dev->usb_state != PM_SUSPEND) { |
Haneen Mohammed | df02b50 | 2015-03-17 08:34:20 +0300 | [diff] [blame] | 638 | dev_err(intf->usb_dev, "usb resume - invalid state\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 639 | return -1; |
| 640 | } |
| 641 | |
| 642 | mux_dev->usb_state = PM_NORMAL; |
| 643 | |
| 644 | for (i = 0; i < MAX_ISSUE_NUM; i++) |
| 645 | gdm_mux_recv(mux_dev, mux_dev->rx_cb); |
| 646 | |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | static struct usb_driver gdm_mux_driver = { |
| 651 | .name = "gdm_mux", |
| 652 | .probe = gdm_mux_probe, |
| 653 | .disconnect = gdm_mux_disconnect, |
| 654 | .id_table = id_table, |
| 655 | .supports_autosuspend = 1, |
| 656 | .suspend = gdm_mux_suspend, |
| 657 | .resume = gdm_mux_resume, |
| 658 | .reset_resume = gdm_mux_resume, |
| 659 | }; |
| 660 | |
| 661 | static int __init gdm_usb_mux_init(void) |
| 662 | { |
| 663 | |
| 664 | mux_rx_wq = create_workqueue("mux_rx_wq"); |
| 665 | if (mux_rx_wq == NULL) { |
Joe Perches | 0ec473b | 2013-07-24 14:13:03 -0700 | [diff] [blame] | 666 | pr_err("work queue create fail\n"); |
Won Kang | 61e1210 | 2013-07-25 03:36:17 +0900 | [diff] [blame] | 667 | return -1; |
| 668 | } |
| 669 | |
| 670 | register_lte_tty_driver(); |
| 671 | |
| 672 | return usb_register(&gdm_mux_driver); |
| 673 | } |
| 674 | |
| 675 | static void __exit gdm_usb_mux_exit(void) |
| 676 | { |
| 677 | unregister_lte_tty_driver(); |
| 678 | |
| 679 | if (mux_rx_wq) { |
| 680 | flush_workqueue(mux_rx_wq); |
| 681 | destroy_workqueue(mux_rx_wq); |
| 682 | } |
| 683 | |
| 684 | usb_deregister(&gdm_mux_driver); |
| 685 | } |
| 686 | |
| 687 | module_init(gdm_usb_mux_init); |
| 688 | module_exit(gdm_usb_mux_exit); |
| 689 | |
| 690 | MODULE_DESCRIPTION("GCT LTE TTY Device Driver"); |
| 691 | MODULE_LICENSE("GPL"); |