Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +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 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/kernel.h> |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 17 | |
| 18 | #include <linux/mmc/core.h> |
| 19 | #include <linux/mmc/card.h> |
| 20 | #include <linux/mmc/sdio_func.h> |
| 21 | #include <linux/mmc/sdio_ids.h> |
| 22 | |
| 23 | #include "gdm_sdio.h" |
| 24 | #include "gdm_wimax.h" |
| 25 | #include "sdio_boot.h" |
| 26 | #include "hci.h" |
| 27 | |
| 28 | #define TYPE_A_HEADER_SIZE 4 |
| 29 | #define TYPE_A_LOOKAHEAD_SIZE 16 |
| 30 | |
| 31 | #define MAX_NR_RX_BUF 4 |
| 32 | |
| 33 | #define SDU_TX_BUF_SIZE 2048 |
Michalis Pappas | ac1a3bf | 2014-05-09 18:08:28 +0800 | [diff] [blame] | 34 | #define TX_BUF_SIZE 2048 |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 35 | #define TX_CHUNK_SIZE (2048 - TYPE_A_HEADER_SIZE) |
Michalis Pappas | ac1a3bf | 2014-05-09 18:08:28 +0800 | [diff] [blame] | 36 | #define RX_BUF_SIZE (25*1024) |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 37 | |
Michalis Pappas | ac1a3bf | 2014-05-09 18:08:28 +0800 | [diff] [blame] | 38 | #define TX_HZ 2000 |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 39 | #define TX_INTERVAL (1000000/TX_HZ) |
| 40 | |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 41 | static struct sdio_tx *alloc_tx_struct(struct tx_cxt *tx) |
| 42 | { |
Ben Chan | 129575f | 2012-09-12 11:43:41 -0700 | [diff] [blame] | 43 | struct sdio_tx *t = kzalloc(sizeof(*t), GFP_ATOMIC); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 44 | |
Ben Chan | 129575f | 2012-09-12 11:43:41 -0700 | [diff] [blame] | 45 | if (!t) |
| 46 | return NULL; |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 47 | |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 48 | t->buf = kmalloc(TX_BUF_SIZE, GFP_ATOMIC); |
Ben Chan | 129575f | 2012-09-12 11:43:41 -0700 | [diff] [blame] | 49 | if (!t->buf) { |
| 50 | kfree(t); |
| 51 | return NULL; |
| 52 | } |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 53 | |
| 54 | t->tx_cxt = tx; |
| 55 | |
| 56 | return t; |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | static void free_tx_struct(struct sdio_tx *t) |
| 60 | { |
| 61 | if (t) { |
| 62 | kfree(t->buf); |
| 63 | kfree(t); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | static struct sdio_rx *alloc_rx_struct(struct rx_cxt *rx) |
| 68 | { |
Ben Chan | 129575f | 2012-09-12 11:43:41 -0700 | [diff] [blame] | 69 | struct sdio_rx *r = kzalloc(sizeof(*r), GFP_ATOMIC); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 70 | |
Ben Chan | 129575f | 2012-09-12 11:43:41 -0700 | [diff] [blame] | 71 | if (r) |
| 72 | r->rx_cxt = rx; |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 73 | |
| 74 | return r; |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | static void free_rx_struct(struct sdio_rx *r) |
| 78 | { |
| 79 | kfree(r); |
| 80 | } |
| 81 | |
| 82 | /* Before this function is called, spin lock should be locked. */ |
| 83 | static struct sdio_tx *get_tx_struct(struct tx_cxt *tx, int *no_spc) |
| 84 | { |
| 85 | struct sdio_tx *t; |
| 86 | |
| 87 | if (list_empty(&tx->free_list)) |
| 88 | return NULL; |
| 89 | |
| 90 | t = list_entry(tx->free_list.prev, struct sdio_tx, list); |
| 91 | list_del(&t->list); |
| 92 | |
| 93 | *no_spc = list_empty(&tx->free_list) ? 1 : 0; |
| 94 | |
| 95 | return t; |
| 96 | } |
| 97 | |
| 98 | /* Before this function is called, spin lock should be locked. */ |
| 99 | static void put_tx_struct(struct tx_cxt *tx, struct sdio_tx *t) |
| 100 | { |
| 101 | list_add_tail(&t->list, &tx->free_list); |
| 102 | } |
| 103 | |
| 104 | /* Before this function is called, spin lock should be locked. */ |
| 105 | static struct sdio_rx *get_rx_struct(struct rx_cxt *rx) |
| 106 | { |
| 107 | struct sdio_rx *r; |
| 108 | |
| 109 | if (list_empty(&rx->free_list)) |
| 110 | return NULL; |
| 111 | |
| 112 | r = list_entry(rx->free_list.prev, struct sdio_rx, list); |
| 113 | list_del(&r->list); |
| 114 | |
| 115 | return r; |
| 116 | } |
| 117 | |
| 118 | /* Before this function is called, spin lock should be locked. */ |
| 119 | static void put_rx_struct(struct rx_cxt *rx, struct sdio_rx *r) |
| 120 | { |
| 121 | list_add_tail(&r->list, &rx->free_list); |
| 122 | } |
| 123 | |
Michalis Pappas | 1aa8ae7 | 2014-07-09 20:44:18 +0100 | [diff] [blame] | 124 | static void release_sdio(struct sdiowm_dev *sdev) |
| 125 | { |
| 126 | struct tx_cxt *tx = &sdev->tx; |
| 127 | struct rx_cxt *rx = &sdev->rx; |
| 128 | struct sdio_tx *t, *t_next; |
| 129 | struct sdio_rx *r, *r_next; |
| 130 | |
| 131 | kfree(tx->sdu_buf); |
| 132 | |
| 133 | list_for_each_entry_safe(t, t_next, &tx->free_list, list) { |
| 134 | list_del(&t->list); |
| 135 | free_tx_struct(t); |
| 136 | } |
| 137 | |
| 138 | list_for_each_entry_safe(t, t_next, &tx->sdu_list, list) { |
| 139 | list_del(&t->list); |
| 140 | free_tx_struct(t); |
| 141 | } |
| 142 | |
| 143 | list_for_each_entry_safe(t, t_next, &tx->hci_list, list) { |
| 144 | list_del(&t->list); |
| 145 | free_tx_struct(t); |
| 146 | } |
| 147 | |
| 148 | kfree(rx->rx_buf); |
| 149 | |
| 150 | list_for_each_entry_safe(r, r_next, &rx->free_list, list) { |
| 151 | list_del(&r->list); |
| 152 | free_rx_struct(r); |
| 153 | } |
| 154 | |
| 155 | list_for_each_entry_safe(r, r_next, &rx->req_list, list) { |
| 156 | list_del(&r->list); |
| 157 | free_rx_struct(r); |
| 158 | } |
| 159 | } |
| 160 | |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 161 | static int init_sdio(struct sdiowm_dev *sdev) |
| 162 | { |
| 163 | int ret = 0, i; |
Michalis Pappas | ac1a3bf | 2014-05-09 18:08:28 +0800 | [diff] [blame] | 164 | struct tx_cxt *tx = &sdev->tx; |
| 165 | struct rx_cxt *rx = &sdev->rx; |
| 166 | struct sdio_tx *t; |
| 167 | struct sdio_rx *r; |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 168 | |
| 169 | INIT_LIST_HEAD(&tx->free_list); |
| 170 | INIT_LIST_HEAD(&tx->sdu_list); |
| 171 | INIT_LIST_HEAD(&tx->hci_list); |
| 172 | |
| 173 | spin_lock_init(&tx->lock); |
| 174 | |
| 175 | tx->sdu_buf = kmalloc(SDU_TX_BUF_SIZE, GFP_KERNEL); |
Joe Perches | 78110bb | 2013-02-11 09:41:29 -0800 | [diff] [blame] | 176 | if (tx->sdu_buf == NULL) |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 177 | goto fail; |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 178 | |
| 179 | for (i = 0; i < MAX_NR_SDU_BUF; i++) { |
| 180 | t = alloc_tx_struct(tx); |
| 181 | if (t == NULL) { |
| 182 | ret = -ENOMEM; |
| 183 | goto fail; |
| 184 | } |
| 185 | list_add(&t->list, &tx->free_list); |
| 186 | } |
| 187 | |
| 188 | INIT_LIST_HEAD(&rx->free_list); |
| 189 | INIT_LIST_HEAD(&rx->req_list); |
| 190 | |
| 191 | spin_lock_init(&rx->lock); |
| 192 | |
| 193 | for (i = 0; i < MAX_NR_RX_BUF; i++) { |
| 194 | r = alloc_rx_struct(rx); |
| 195 | if (r == NULL) { |
| 196 | ret = -ENOMEM; |
| 197 | goto fail; |
| 198 | } |
| 199 | list_add(&r->list, &rx->free_list); |
| 200 | } |
| 201 | |
| 202 | rx->rx_buf = kmalloc(RX_BUF_SIZE, GFP_KERNEL); |
Joe Perches | 78110bb | 2013-02-11 09:41:29 -0800 | [diff] [blame] | 203 | if (rx->rx_buf == NULL) |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 204 | goto fail; |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 205 | |
| 206 | return 0; |
| 207 | |
| 208 | fail: |
| 209 | release_sdio(sdev); |
| 210 | return ret; |
| 211 | } |
| 212 | |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 213 | static void send_sdio_pkt(struct sdio_func *func, u8 *data, int len) |
| 214 | { |
| 215 | int n, blocks, ret, remain; |
| 216 | |
| 217 | sdio_claim_host(func); |
| 218 | |
| 219 | blocks = len / func->cur_blksize; |
| 220 | n = blocks * func->cur_blksize; |
| 221 | if (blocks) { |
| 222 | ret = sdio_memcpy_toio(func, 0, data, n); |
| 223 | if (ret < 0) { |
| 224 | if (ret != -ENOMEDIUM) |
YAMANE Toshiaki | c9a796d | 2012-10-29 20:05:16 +0900 | [diff] [blame] | 225 | dev_err(&func->dev, |
| 226 | "gdmwms: %s error: ret = %d\n", |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 227 | __func__, ret); |
| 228 | goto end_io; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | remain = len - n; |
| 233 | remain = (remain + 3) & ~3; |
| 234 | |
| 235 | if (remain) { |
| 236 | ret = sdio_memcpy_toio(func, 0, data + n, remain); |
| 237 | if (ret < 0) { |
| 238 | if (ret != -ENOMEDIUM) |
YAMANE Toshiaki | c9a796d | 2012-10-29 20:05:16 +0900 | [diff] [blame] | 239 | dev_err(&func->dev, |
| 240 | "gdmwms: %s error: ret = %d\n", |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 241 | __func__, ret); |
| 242 | goto end_io; |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | end_io: |
| 247 | sdio_release_host(func); |
| 248 | } |
| 249 | |
| 250 | static void send_sdu(struct sdio_func *func, struct tx_cxt *tx) |
| 251 | { |
| 252 | struct list_head *l, *next; |
| 253 | struct hci_s *hci; |
| 254 | struct sdio_tx *t; |
| 255 | int pos, len, i, estlen, aggr_num = 0, aggr_len; |
| 256 | u8 *buf; |
| 257 | unsigned long flags; |
| 258 | |
| 259 | spin_lock_irqsave(&tx->lock, flags); |
| 260 | |
| 261 | pos = TYPE_A_HEADER_SIZE + HCI_HEADER_SIZE; |
| 262 | list_for_each_entry(t, &tx->sdu_list, list) { |
| 263 | estlen = ((t->len + 3) & ~3) + 4; |
| 264 | if ((pos + estlen) > SDU_TX_BUF_SIZE) |
| 265 | break; |
| 266 | |
| 267 | aggr_num++; |
| 268 | memcpy(tx->sdu_buf + pos, t->buf, t->len); |
| 269 | memset(tx->sdu_buf + pos + t->len, 0, estlen - t->len); |
| 270 | pos += estlen; |
| 271 | } |
| 272 | aggr_len = pos; |
| 273 | |
| 274 | hci = (struct hci_s *)(tx->sdu_buf + TYPE_A_HEADER_SIZE); |
Ben Chan | a8a175d | 2014-06-30 23:32:27 -0700 | [diff] [blame] | 275 | hci->cmd_evt = cpu_to_be16(WIMAX_TX_SDU_AGGR); |
| 276 | hci->length = cpu_to_be16(aggr_len - TYPE_A_HEADER_SIZE - |
| 277 | HCI_HEADER_SIZE); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 278 | |
| 279 | spin_unlock_irqrestore(&tx->lock, flags); |
| 280 | |
Greg Kroah-Hartman | 75533a0 | 2014-07-17 18:33:02 -0700 | [diff] [blame] | 281 | dev_dbg(&func->dev, "sdio_send: %*ph\n", aggr_len - TYPE_A_HEADER_SIZE, |
Michalis Pappas | f5439c6 | 2014-07-17 17:09:39 +0100 | [diff] [blame] | 282 | tx->sdu_buf + TYPE_A_HEADER_SIZE); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 283 | |
| 284 | for (pos = TYPE_A_HEADER_SIZE; pos < aggr_len; pos += TX_CHUNK_SIZE) { |
| 285 | len = aggr_len - pos; |
| 286 | len = len > TX_CHUNK_SIZE ? TX_CHUNK_SIZE : len; |
| 287 | buf = tx->sdu_buf + pos - TYPE_A_HEADER_SIZE; |
| 288 | |
| 289 | buf[0] = len & 0xff; |
| 290 | buf[1] = (len >> 8) & 0xff; |
| 291 | buf[2] = (len >> 16) & 0xff; |
| 292 | buf[3] = (pos + len) >= aggr_len ? 0 : 1; |
| 293 | send_sdio_pkt(func, buf, len + TYPE_A_HEADER_SIZE); |
| 294 | } |
| 295 | |
| 296 | spin_lock_irqsave(&tx->lock, flags); |
| 297 | |
| 298 | for (l = tx->sdu_list.next, i = 0; i < aggr_num; i++, l = next) { |
| 299 | next = l->next; |
| 300 | t = list_entry(l, struct sdio_tx, list); |
| 301 | if (t->callback) |
| 302 | t->callback(t->cb_data); |
| 303 | |
| 304 | list_del(l); |
| 305 | put_tx_struct(t->tx_cxt, t); |
| 306 | } |
| 307 | |
| 308 | do_gettimeofday(&tx->sdu_stamp); |
| 309 | spin_unlock_irqrestore(&tx->lock, flags); |
| 310 | } |
| 311 | |
Davide Gianforte | a3709f7 | 2014-05-23 22:06:44 +0200 | [diff] [blame] | 312 | static void send_hci(struct sdio_func *func, struct tx_cxt *tx, |
| 313 | struct sdio_tx *t) |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 314 | { |
| 315 | unsigned long flags; |
| 316 | |
Greg Kroah-Hartman | 75533a0 | 2014-07-17 18:33:02 -0700 | [diff] [blame] | 317 | dev_dbg(&func->dev, "sdio_send: %*ph\n", t->len - TYPE_A_HEADER_SIZE, |
Michalis Pappas | f5439c6 | 2014-07-17 17:09:39 +0100 | [diff] [blame] | 318 | t->buf + TYPE_A_HEADER_SIZE); |
| 319 | |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 320 | send_sdio_pkt(func, t->buf, t->len); |
| 321 | |
| 322 | spin_lock_irqsave(&tx->lock, flags); |
| 323 | if (t->callback) |
| 324 | t->callback(t->cb_data); |
| 325 | free_tx_struct(t); |
| 326 | spin_unlock_irqrestore(&tx->lock, flags); |
| 327 | } |
| 328 | |
| 329 | static void do_tx(struct work_struct *work) |
| 330 | { |
| 331 | struct sdiowm_dev *sdev = container_of(work, struct sdiowm_dev, ws); |
| 332 | struct sdio_func *func = sdev->func; |
| 333 | struct tx_cxt *tx = &sdev->tx; |
| 334 | struct sdio_tx *t = NULL; |
| 335 | struct timeval now, *before; |
| 336 | int is_sdu = 0; |
| 337 | long diff; |
| 338 | unsigned long flags; |
| 339 | |
| 340 | spin_lock_irqsave(&tx->lock, flags); |
| 341 | if (!tx->can_send) { |
| 342 | spin_unlock_irqrestore(&tx->lock, flags); |
| 343 | return; |
| 344 | } |
| 345 | |
| 346 | if (!list_empty(&tx->hci_list)) { |
| 347 | t = list_entry(tx->hci_list.next, struct sdio_tx, list); |
| 348 | list_del(&t->list); |
| 349 | is_sdu = 0; |
| 350 | } else if (!tx->stop_sdu_tx && !list_empty(&tx->sdu_list)) { |
| 351 | do_gettimeofday(&now); |
| 352 | before = &tx->sdu_stamp; |
| 353 | |
| 354 | diff = (now.tv_sec - before->tv_sec) * 1000000 + |
| 355 | (now.tv_usec - before->tv_usec); |
| 356 | if (diff >= 0 && diff < TX_INTERVAL) { |
| 357 | schedule_work(&sdev->ws); |
| 358 | spin_unlock_irqrestore(&tx->lock, flags); |
| 359 | return; |
| 360 | } |
| 361 | is_sdu = 1; |
| 362 | } |
| 363 | |
| 364 | if (!is_sdu && t == NULL) { |
| 365 | spin_unlock_irqrestore(&tx->lock, flags); |
| 366 | return; |
| 367 | } |
| 368 | |
| 369 | tx->can_send = 0; |
| 370 | |
| 371 | spin_unlock_irqrestore(&tx->lock, flags); |
| 372 | |
| 373 | if (is_sdu) |
| 374 | send_sdu(func, tx); |
| 375 | else |
| 376 | send_hci(func, tx, t); |
| 377 | } |
| 378 | |
| 379 | static int gdm_sdio_send(void *priv_dev, void *data, int len, |
Michalis Pappas | 39c511f | 2014-05-09 18:08:27 +0800 | [diff] [blame] | 380 | void (*cb)(void *data), void *cb_data) |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 381 | { |
| 382 | struct sdiowm_dev *sdev = priv_dev; |
| 383 | struct tx_cxt *tx = &sdev->tx; |
| 384 | struct sdio_tx *t; |
| 385 | u8 *pkt = data; |
| 386 | int no_spc = 0; |
| 387 | u16 cmd_evt; |
| 388 | unsigned long flags; |
| 389 | |
Ben Chan | 0fbce84 | 2014-06-27 23:17:24 -0700 | [diff] [blame] | 390 | if (len > TX_BUF_SIZE - TYPE_A_HEADER_SIZE) |
| 391 | return -EINVAL; |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 392 | |
| 393 | spin_lock_irqsave(&tx->lock, flags); |
| 394 | |
| 395 | cmd_evt = (pkt[0] << 8) | pkt[1]; |
| 396 | if (cmd_evt == WIMAX_TX_SDU) { |
| 397 | t = get_tx_struct(tx, &no_spc); |
| 398 | if (t == NULL) { |
| 399 | /* This case must not happen. */ |
| 400 | spin_unlock_irqrestore(&tx->lock, flags); |
| 401 | return -ENOSPC; |
| 402 | } |
| 403 | list_add_tail(&t->list, &tx->sdu_list); |
| 404 | |
| 405 | memcpy(t->buf, data, len); |
| 406 | |
| 407 | t->len = len; |
| 408 | t->callback = cb; |
| 409 | t->cb_data = cb_data; |
| 410 | } else { |
| 411 | t = alloc_tx_struct(tx); |
| 412 | if (t == NULL) { |
| 413 | spin_unlock_irqrestore(&tx->lock, flags); |
| 414 | return -ENOMEM; |
| 415 | } |
| 416 | list_add_tail(&t->list, &tx->hci_list); |
| 417 | |
| 418 | t->buf[0] = len & 0xff; |
| 419 | t->buf[1] = (len >> 8) & 0xff; |
| 420 | t->buf[2] = (len >> 16) & 0xff; |
| 421 | t->buf[3] = 2; |
| 422 | memcpy(t->buf + TYPE_A_HEADER_SIZE, data, len); |
| 423 | |
| 424 | t->len = len + TYPE_A_HEADER_SIZE; |
| 425 | t->callback = cb; |
| 426 | t->cb_data = cb_data; |
| 427 | } |
| 428 | |
| 429 | if (tx->can_send) |
| 430 | schedule_work(&sdev->ws); |
| 431 | |
| 432 | spin_unlock_irqrestore(&tx->lock, flags); |
| 433 | |
| 434 | if (no_spc) |
| 435 | return -ENOSPC; |
| 436 | |
| 437 | return 0; |
| 438 | } |
| 439 | |
Ben Chan | e7d374e | 2014-06-24 00:55:58 -0700 | [diff] [blame] | 440 | /* Handle the HCI, WIMAX_SDU_TX_FLOW. */ |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 441 | static int control_sdu_tx_flow(struct sdiowm_dev *sdev, u8 *hci_data, int len) |
| 442 | { |
| 443 | struct tx_cxt *tx = &sdev->tx; |
| 444 | u16 cmd_evt; |
| 445 | unsigned long flags; |
| 446 | |
| 447 | spin_lock_irqsave(&tx->lock, flags); |
| 448 | |
| 449 | cmd_evt = (hci_data[0] << 8) | (hci_data[1]); |
| 450 | if (cmd_evt != WIMAX_SDU_TX_FLOW) |
| 451 | goto out; |
| 452 | |
| 453 | if (hci_data[4] == 0) { |
Kristina Martšenko | 8943a92 | 2014-03-15 01:10:05 +0200 | [diff] [blame] | 454 | dev_dbg(&sdev->func->dev, "WIMAX ==> STOP SDU TX\n"); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 455 | tx->stop_sdu_tx = 1; |
| 456 | } else if (hci_data[4] == 1) { |
Kristina Martšenko | 8943a92 | 2014-03-15 01:10:05 +0200 | [diff] [blame] | 457 | dev_dbg(&sdev->func->dev, "WIMAX ==> START SDU TX\n"); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 458 | tx->stop_sdu_tx = 0; |
| 459 | if (tx->can_send) |
| 460 | schedule_work(&sdev->ws); |
Ben Chan | e7d374e | 2014-06-24 00:55:58 -0700 | [diff] [blame] | 461 | /* If free buffer for sdu tx doesn't exist, then tx queue |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 462 | * should not be woken. For this reason, don't pass the command, |
| 463 | * START_SDU_TX. |
| 464 | */ |
| 465 | if (list_empty(&tx->free_list)) |
| 466 | len = 0; |
| 467 | } |
| 468 | |
| 469 | out: |
| 470 | spin_unlock_irqrestore(&tx->lock, flags); |
| 471 | return len; |
| 472 | } |
| 473 | |
| 474 | static void gdm_sdio_irq(struct sdio_func *func) |
| 475 | { |
| 476 | struct phy_dev *phy_dev = sdio_get_drvdata(func); |
| 477 | struct sdiowm_dev *sdev = phy_dev->priv_dev; |
| 478 | struct tx_cxt *tx = &sdev->tx; |
| 479 | struct rx_cxt *rx = &sdev->rx; |
| 480 | struct sdio_rx *r; |
| 481 | unsigned long flags; |
| 482 | u8 val, hdr[TYPE_A_LOOKAHEAD_SIZE], *buf; |
| 483 | u32 len, blocks, n; |
| 484 | int ret, remain; |
| 485 | |
| 486 | /* Check interrupt */ |
| 487 | val = sdio_readb(func, 0x13, &ret); |
| 488 | if (val & 0x01) |
| 489 | sdio_writeb(func, 0x01, 0x13, &ret); /* clear interrupt */ |
| 490 | else |
| 491 | return; |
| 492 | |
| 493 | ret = sdio_memcpy_fromio(func, hdr, 0x0, TYPE_A_LOOKAHEAD_SIZE); |
| 494 | if (ret) { |
YAMANE Toshiaki | c9a796d | 2012-10-29 20:05:16 +0900 | [diff] [blame] | 495 | dev_err(&func->dev, |
| 496 | "Cannot read from function %d\n", func->num); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 497 | goto done; |
| 498 | } |
| 499 | |
| 500 | len = (hdr[2] << 16) | (hdr[1] << 8) | hdr[0]; |
| 501 | if (len > (RX_BUF_SIZE - TYPE_A_HEADER_SIZE)) { |
YAMANE Toshiaki | c9a796d | 2012-10-29 20:05:16 +0900 | [diff] [blame] | 502 | dev_err(&func->dev, "Too big Type-A size: %d\n", len); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 503 | goto done; |
| 504 | } |
| 505 | |
| 506 | if (hdr[3] == 1) { /* Ack */ |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 507 | u32 *ack_seq = (u32 *)&hdr[4]; |
Michalis Pappas | 39c511f | 2014-05-09 18:08:27 +0800 | [diff] [blame] | 508 | |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 509 | spin_lock_irqsave(&tx->lock, flags); |
| 510 | tx->can_send = 1; |
| 511 | |
| 512 | if (!list_empty(&tx->sdu_list) || !list_empty(&tx->hci_list)) |
| 513 | schedule_work(&sdev->ws); |
| 514 | spin_unlock_irqrestore(&tx->lock, flags); |
Kristina Martšenko | 8943a92 | 2014-03-15 01:10:05 +0200 | [diff] [blame] | 515 | dev_dbg(&func->dev, "Ack... %0x\n", ntohl(*ack_seq)); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 516 | goto done; |
| 517 | } |
| 518 | |
| 519 | memcpy(rx->rx_buf, hdr + TYPE_A_HEADER_SIZE, |
Michalis Pappas | 39c511f | 2014-05-09 18:08:27 +0800 | [diff] [blame] | 520 | TYPE_A_LOOKAHEAD_SIZE - TYPE_A_HEADER_SIZE); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 521 | |
| 522 | buf = rx->rx_buf + TYPE_A_LOOKAHEAD_SIZE - TYPE_A_HEADER_SIZE; |
| 523 | remain = len - TYPE_A_LOOKAHEAD_SIZE + TYPE_A_HEADER_SIZE; |
| 524 | if (remain <= 0) |
| 525 | goto end_io; |
| 526 | |
| 527 | blocks = remain / func->cur_blksize; |
| 528 | |
| 529 | if (blocks) { |
| 530 | n = blocks * func->cur_blksize; |
| 531 | ret = sdio_memcpy_fromio(func, buf, 0x0, n); |
| 532 | if (ret) { |
YAMANE Toshiaki | c9a796d | 2012-10-29 20:05:16 +0900 | [diff] [blame] | 533 | dev_err(&func->dev, |
| 534 | "Cannot read from function %d\n", func->num); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 535 | goto done; |
| 536 | } |
| 537 | buf += n; |
| 538 | remain -= n; |
| 539 | } |
| 540 | |
| 541 | if (remain) { |
| 542 | ret = sdio_memcpy_fromio(func, buf, 0x0, remain); |
| 543 | if (ret) { |
YAMANE Toshiaki | c9a796d | 2012-10-29 20:05:16 +0900 | [diff] [blame] | 544 | dev_err(&func->dev, |
| 545 | "Cannot read from function %d\n", func->num); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 546 | goto done; |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | end_io: |
Greg Kroah-Hartman | 75533a0 | 2014-07-17 18:33:02 -0700 | [diff] [blame] | 551 | dev_dbg(&func->dev, "sdio_receive: %*ph\n", len, rx->rx_buf); |
Michalis Pappas | f5439c6 | 2014-07-17 17:09:39 +0100 | [diff] [blame] | 552 | |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 553 | len = control_sdu_tx_flow(sdev, rx->rx_buf, len); |
| 554 | |
| 555 | spin_lock_irqsave(&rx->lock, flags); |
| 556 | |
| 557 | if (!list_empty(&rx->req_list)) { |
| 558 | r = list_entry(rx->req_list.next, struct sdio_rx, list); |
| 559 | spin_unlock_irqrestore(&rx->lock, flags); |
| 560 | if (r->callback) |
| 561 | r->callback(r->cb_data, rx->rx_buf, len); |
| 562 | spin_lock_irqsave(&rx->lock, flags); |
| 563 | list_del(&r->list); |
| 564 | put_rx_struct(rx, r); |
| 565 | } |
| 566 | |
| 567 | spin_unlock_irqrestore(&rx->lock, flags); |
| 568 | |
| 569 | done: |
| 570 | sdio_writeb(func, 0x00, 0x10, &ret); /* PCRRT */ |
| 571 | if (!phy_dev->netdev) |
Paul Stewart | 54bc1ff | 2012-05-17 11:15:10 -0700 | [diff] [blame] | 572 | register_wimax_device(phy_dev, &func->dev); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | static int gdm_sdio_receive(void *priv_dev, |
Michalis Pappas | 39c511f | 2014-05-09 18:08:27 +0800 | [diff] [blame] | 576 | void (*cb)(void *cb_data, void *data, int len), |
| 577 | void *cb_data) |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 578 | { |
| 579 | struct sdiowm_dev *sdev = priv_dev; |
| 580 | struct rx_cxt *rx = &sdev->rx; |
| 581 | struct sdio_rx *r; |
| 582 | unsigned long flags; |
| 583 | |
| 584 | spin_lock_irqsave(&rx->lock, flags); |
| 585 | r = get_rx_struct(rx); |
| 586 | if (r == NULL) { |
| 587 | spin_unlock_irqrestore(&rx->lock, flags); |
| 588 | return -ENOMEM; |
| 589 | } |
| 590 | |
| 591 | r->callback = cb; |
| 592 | r->cb_data = cb_data; |
| 593 | |
| 594 | list_add_tail(&r->list, &rx->req_list); |
| 595 | spin_unlock_irqrestore(&rx->lock, flags); |
| 596 | |
| 597 | return 0; |
| 598 | } |
| 599 | |
Davide Gianforte | a3709f7 | 2014-05-23 22:06:44 +0200 | [diff] [blame] | 600 | static int sdio_wimax_probe(struct sdio_func *func, |
| 601 | const struct sdio_device_id *id) |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 602 | { |
| 603 | int ret; |
| 604 | struct phy_dev *phy_dev = NULL; |
| 605 | struct sdiowm_dev *sdev = NULL; |
| 606 | |
YAMANE Toshiaki | c9a796d | 2012-10-29 20:05:16 +0900 | [diff] [blame] | 607 | dev_info(&func->dev, "Found GDM SDIO VID = 0x%04x PID = 0x%04x...\n", |
| 608 | func->vendor, func->device); |
| 609 | dev_info(&func->dev, "GCT WiMax driver version %s\n", DRIVER_VERSION); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 610 | |
| 611 | sdio_claim_host(func); |
| 612 | sdio_enable_func(func); |
| 613 | sdio_claim_irq(func, gdm_sdio_irq); |
| 614 | |
| 615 | ret = sdio_boot(func); |
| 616 | if (ret) |
| 617 | return ret; |
| 618 | |
Devendra Naga | c2a1793 | 2012-07-12 11:58:37 +0545 | [diff] [blame] | 619 | phy_dev = kzalloc(sizeof(*phy_dev), GFP_KERNEL); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 620 | if (phy_dev == NULL) { |
| 621 | ret = -ENOMEM; |
| 622 | goto out; |
| 623 | } |
Devendra Naga | c2a1793 | 2012-07-12 11:58:37 +0545 | [diff] [blame] | 624 | sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 625 | if (sdev == NULL) { |
| 626 | ret = -ENOMEM; |
| 627 | goto out; |
| 628 | } |
| 629 | |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 630 | phy_dev->priv_dev = (void *)sdev; |
| 631 | phy_dev->send_func = gdm_sdio_send; |
| 632 | phy_dev->rcv_func = gdm_sdio_receive; |
| 633 | |
| 634 | ret = init_sdio(sdev); |
Alan Cox | f1efd9f | 2012-09-04 16:04:36 +0100 | [diff] [blame] | 635 | if (ret < 0) |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 636 | goto out; |
| 637 | |
| 638 | sdev->func = func; |
| 639 | |
| 640 | sdio_writeb(func, 1, 0x14, &ret); /* Enable interrupt */ |
| 641 | sdio_release_host(func); |
| 642 | |
| 643 | INIT_WORK(&sdev->ws, do_tx); |
| 644 | |
| 645 | sdio_set_drvdata(func, phy_dev); |
| 646 | out: |
| 647 | if (ret) { |
| 648 | kfree(phy_dev); |
| 649 | kfree(sdev); |
| 650 | } |
| 651 | |
| 652 | return ret; |
| 653 | } |
| 654 | |
| 655 | static void sdio_wimax_remove(struct sdio_func *func) |
| 656 | { |
| 657 | struct phy_dev *phy_dev = sdio_get_drvdata(func); |
| 658 | struct sdiowm_dev *sdev = phy_dev->priv_dev; |
| 659 | |
Devendra Naga | c0352cb | 2013-04-13 20:16:51 +0530 | [diff] [blame] | 660 | cancel_work_sync(&sdev->ws); |
Sage Ahn | 247e9cf | 2012-05-15 13:20:36 +0900 | [diff] [blame] | 661 | if (phy_dev->netdev) |
| 662 | unregister_wimax_device(phy_dev); |
| 663 | sdio_claim_host(func); |
| 664 | sdio_release_irq(func); |
| 665 | sdio_disable_func(func); |
| 666 | sdio_release_host(func); |
| 667 | release_sdio(sdev); |
| 668 | |
| 669 | kfree(sdev); |
| 670 | kfree(phy_dev); |
| 671 | } |
| 672 | |
| 673 | static const struct sdio_device_id sdio_wimax_ids[] = { |
| 674 | { SDIO_DEVICE(0x0296, 0x5347) }, |
| 675 | {0} |
| 676 | }; |
| 677 | |
| 678 | MODULE_DEVICE_TABLE(sdio, sdio_wimax_ids); |
| 679 | |
| 680 | static struct sdio_driver sdio_wimax_driver = { |
| 681 | .probe = sdio_wimax_probe, |
| 682 | .remove = sdio_wimax_remove, |
| 683 | .name = "sdio_wimax", |
| 684 | .id_table = sdio_wimax_ids, |
| 685 | }; |
| 686 | |
| 687 | static int __init sdio_gdm_wimax_init(void) |
| 688 | { |
| 689 | return sdio_register_driver(&sdio_wimax_driver); |
| 690 | } |
| 691 | |
| 692 | static void __exit sdio_gdm_wimax_exit(void) |
| 693 | { |
| 694 | sdio_unregister_driver(&sdio_wimax_driver); |
| 695 | } |
| 696 | |
| 697 | module_init(sdio_gdm_wimax_init); |
| 698 | module_exit(sdio_gdm_wimax_exit); |
| 699 | |
| 700 | MODULE_VERSION(DRIVER_VERSION); |
| 701 | MODULE_DESCRIPTION("GCT WiMax SDIO Device Driver"); |
| 702 | MODULE_AUTHOR("Ethan Park"); |
| 703 | MODULE_LICENSE("GPL"); |