1 /* 2 * http://www.cascoda.com/products/ca-821x/ 3 * Copyright (c) 2016, Cascoda, Ltd. 4 * All rights reserved. 5 * 6 * This code is dual-licensed under both GPLv2 and 3-clause BSD. What follows is 7 * the license notice for both respectively. 8 * 9 ******************************************************************************* 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 2 14 * of the License, or (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 ******************************************************************************* 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions are met: 25 * 26 * 1. Redistributions of source code must retain the above copyright notice, 27 * this list of conditions and the following disclaimer. 28 * 29 * 2. Redistributions in binary form must reproduce the above copyright notice, 30 * this list of conditions and the following disclaimer in the documentation 31 * and/or other materials provided with the distribution. 32 * 33 * 3. Neither the name of the copyright holder nor the names of its contributors 34 * may be used to endorse or promote products derived from this software without 35 * specific prior written permission. 36 * 37 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 38 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 40 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE 41 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 42 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 43 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 44 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 45 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 47 * POSSIBILITY OF SUCH DAMAGE. 48 */ 49 50 #include <linux/cdev.h> 51 #include <linux/clk-provider.h> 52 #include <linux/debugfs.h> 53 #include <linux/delay.h> 54 #include <linux/gpio.h> 55 #include <linux/ieee802154.h> 56 #include <linux/kfifo.h> 57 #include <linux/of.h> 58 #include <linux/of_device.h> 59 #include <linux/of_gpio.h> 60 #include <linux/module.h> 61 #include <linux/mutex.h> 62 #include <linux/poll.h> 63 #include <linux/skbuff.h> 64 #include <linux/slab.h> 65 #include <linux/spi/spi.h> 66 #include <linux/spinlock.h> 67 #include <linux/string.h> 68 #include <linux/workqueue.h> 69 #include <linux/interrupt.h> 70 71 #include <net/ieee802154_netdev.h> 72 #include <net/mac802154.h> 73 74 #define DRIVER_NAME "ca8210" 75 76 /* external clock frequencies */ 77 #define ONE_MHZ 1000000 78 #define TWO_MHZ (2 * ONE_MHZ) 79 #define FOUR_MHZ (4 * ONE_MHZ) 80 #define EIGHT_MHZ (8 * ONE_MHZ) 81 #define SIXTEEN_MHZ (16 * ONE_MHZ) 82 83 /* spi constants */ 84 #define CA8210_SPI_BUF_SIZE 256 85 #define CA8210_SYNC_TIMEOUT 1000 /* Timeout for synchronous commands [ms] */ 86 87 /* test interface constants */ 88 #define CA8210_TEST_INT_FILE_NAME "ca8210_test" 89 #define CA8210_TEST_INT_FIFO_SIZE 256 90 91 /* MAC status enumerations */ 92 #define MAC_SUCCESS (0x00) 93 #define MAC_ERROR (0x01) 94 #define MAC_CANCELLED (0x02) 95 #define MAC_READY_FOR_POLL (0x03) 96 #define MAC_COUNTER_ERROR (0xDB) 97 #define MAC_IMPROPER_KEY_TYPE (0xDC) 98 #define MAC_IMPROPER_SECURITY_LEVEL (0xDD) 99 #define MAC_UNSUPPORTED_LEGACY (0xDE) 100 #define MAC_UNSUPPORTED_SECURITY (0xDF) 101 #define MAC_BEACON_LOST (0xE0) 102 #define MAC_CHANNEL_ACCESS_FAILURE (0xE1) 103 #define MAC_DENIED (0xE2) 104 #define MAC_DISABLE_TRX_FAILURE (0xE3) 105 #define MAC_SECURITY_ERROR (0xE4) 106 #define MAC_FRAME_TOO_LONG (0xE5) 107 #define MAC_INVALID_GTS (0xE6) 108 #define MAC_INVALID_HANDLE (0xE7) 109 #define MAC_INVALID_PARAMETER (0xE8) 110 #define MAC_NO_ACK (0xE9) 111 #define MAC_NO_BEACON (0xEA) 112 #define MAC_NO_DATA (0xEB) 113 #define MAC_NO_SHORT_ADDRESS (0xEC) 114 #define MAC_OUT_OF_CAP (0xED) 115 #define MAC_PAN_ID_CONFLICT (0xEE) 116 #define MAC_REALIGNMENT (0xEF) 117 #define MAC_TRANSACTION_EXPIRED (0xF0) 118 #define MAC_TRANSACTION_OVERFLOW (0xF1) 119 #define MAC_TX_ACTIVE (0xF2) 120 #define MAC_UNAVAILABLE_KEY (0xF3) 121 #define MAC_UNSUPPORTED_ATTRIBUTE (0xF4) 122 #define MAC_INVALID_ADDRESS (0xF5) 123 #define MAC_ON_TIME_TOO_LONG (0xF6) 124 #define MAC_PAST_TIME (0xF7) 125 #define MAC_TRACKING_OFF (0xF8) 126 #define MAC_INVALID_INDEX (0xF9) 127 #define MAC_LIMIT_REACHED (0xFA) 128 #define MAC_READ_ONLY (0xFB) 129 #define MAC_SCAN_IN_PROGRESS (0xFC) 130 #define MAC_SUPERFRAME_OVERLAP (0xFD) 131 #define MAC_SYSTEM_ERROR (0xFF) 132 133 /* HWME attribute IDs */ 134 #define HWME_EDTHRESHOLD (0x04) 135 #define HWME_EDVALUE (0x06) 136 #define HWME_SYSCLKOUT (0x0F) 137 #define HWME_LQILIMIT (0x11) 138 139 /* TDME attribute IDs */ 140 #define TDME_CHANNEL (0x00) 141 #define TDME_ATM_CONFIG (0x06) 142 143 #define MAX_HWME_ATTRIBUTE_SIZE 16 144 #define MAX_TDME_ATTRIBUTE_SIZE 2 145 146 /* PHY/MAC PIB Attribute Enumerations */ 147 #define PHY_CURRENT_CHANNEL (0x00) 148 #define PHY_TRANSMIT_POWER (0x02) 149 #define PHY_CCA_MODE (0x03) 150 #define MAC_ASSOCIATION_PERMIT (0x41) 151 #define MAC_AUTO_REQUEST (0x42) 152 #define MAC_BATT_LIFE_EXT (0x43) 153 #define MAC_BATT_LIFE_EXT_PERIODS (0x44) 154 #define MAC_BEACON_PAYLOAD (0x45) 155 #define MAC_BEACON_PAYLOAD_LENGTH (0x46) 156 #define MAC_BEACON_ORDER (0x47) 157 #define MAC_GTS_PERMIT (0x4d) 158 #define MAC_MAX_CSMA_BACKOFFS (0x4e) 159 #define MAC_MIN_BE (0x4f) 160 #define MAC_PAN_ID (0x50) 161 #define MAC_PROMISCUOUS_MODE (0x51) 162 #define MAC_RX_ON_WHEN_IDLE (0x52) 163 #define MAC_SHORT_ADDRESS (0x53) 164 #define MAC_SUPERFRAME_ORDER (0x54) 165 #define MAC_ASSOCIATED_PAN_COORD (0x56) 166 #define MAC_MAX_BE (0x57) 167 #define MAC_MAX_FRAME_RETRIES (0x59) 168 #define MAC_RESPONSE_WAIT_TIME (0x5A) 169 #define MAC_SECURITY_ENABLED (0x5D) 170 171 #define MAC_AUTO_REQUEST_SECURITY_LEVEL (0x78) 172 #define MAC_AUTO_REQUEST_KEY_ID_MODE (0x79) 173 174 #define NS_IEEE_ADDRESS (0xFF) /* Non-standard IEEE address */ 175 176 /* MAC Address Mode Definitions */ 177 #define MAC_MODE_NO_ADDR (0x00) 178 #define MAC_MODE_SHORT_ADDR (0x02) 179 #define MAC_MODE_LONG_ADDR (0x03) 180 181 /* MAC constants */ 182 #define MAX_BEACON_OVERHEAD (75) 183 #define MAX_BEACON_PAYLOAD_LENGTH (IEEE802154_MTU - MAX_BEACON_OVERHEAD) 184 185 #define MAX_ATTRIBUTE_SIZE (122) 186 #define MAX_DATA_SIZE (114) 187 188 #define CA8210_VALID_CHANNELS (0x07FFF800) 189 190 /* MAC workarounds for V1.1 and MPW silicon (V0.x) */ 191 #define CA8210_MAC_WORKAROUNDS (0) 192 #define CA8210_MAC_MPW (0) 193 194 /* memory manipulation macros */ 195 #define LS_BYTE(x) ((u8)((x) & 0xFF)) 196 #define MS_BYTE(x) ((u8)(((x) >> 8) & 0xFF)) 197 198 /* message ID codes in SPI commands */ 199 /* downstream */ 200 #define MCPS_DATA_REQUEST (0x00) 201 #define MLME_ASSOCIATE_REQUEST (0x02) 202 #define MLME_ASSOCIATE_RESPONSE (0x03) 203 #define MLME_DISASSOCIATE_REQUEST (0x04) 204 #define MLME_GET_REQUEST (0x05) 205 #define MLME_ORPHAN_RESPONSE (0x06) 206 #define MLME_RESET_REQUEST (0x07) 207 #define MLME_RX_ENABLE_REQUEST (0x08) 208 #define MLME_SCAN_REQUEST (0x09) 209 #define MLME_SET_REQUEST (0x0A) 210 #define MLME_START_REQUEST (0x0B) 211 #define MLME_POLL_REQUEST (0x0D) 212 #define HWME_SET_REQUEST (0x0E) 213 #define HWME_GET_REQUEST (0x0F) 214 #define TDME_SETSFR_REQUEST (0x11) 215 #define TDME_GETSFR_REQUEST (0x12) 216 #define TDME_SET_REQUEST (0x14) 217 /* upstream */ 218 #define MCPS_DATA_INDICATION (0x00) 219 #define MCPS_DATA_CONFIRM (0x01) 220 #define MLME_RESET_CONFIRM (0x0A) 221 #define MLME_SET_CONFIRM (0x0E) 222 #define MLME_START_CONFIRM (0x0F) 223 #define HWME_SET_CONFIRM (0x12) 224 #define HWME_GET_CONFIRM (0x13) 225 #define HWME_WAKEUP_INDICATION (0x15) 226 #define TDME_SETSFR_CONFIRM (0x17) 227 228 /* SPI command IDs */ 229 /* bit indicating a confirm or indication from slave to master */ 230 #define SPI_S2M (0x20) 231 /* bit indicating a synchronous message */ 232 #define SPI_SYN (0x40) 233 234 /* SPI command definitions */ 235 #define SPI_IDLE (0xFF) 236 #define SPI_NACK (0xF0) 237 238 #define SPI_MCPS_DATA_REQUEST (MCPS_DATA_REQUEST) 239 #define SPI_MCPS_DATA_INDICATION (MCPS_DATA_INDICATION + SPI_S2M) 240 #define SPI_MCPS_DATA_CONFIRM (MCPS_DATA_CONFIRM + SPI_S2M) 241 242 #define SPI_MLME_ASSOCIATE_REQUEST (MLME_ASSOCIATE_REQUEST) 243 #define SPI_MLME_RESET_REQUEST (MLME_RESET_REQUEST + SPI_SYN) 244 #define SPI_MLME_SET_REQUEST (MLME_SET_REQUEST + SPI_SYN) 245 #define SPI_MLME_START_REQUEST (MLME_START_REQUEST + SPI_SYN) 246 #define SPI_MLME_RESET_CONFIRM (MLME_RESET_CONFIRM + SPI_S2M + SPI_SYN) 247 #define SPI_MLME_SET_CONFIRM (MLME_SET_CONFIRM + SPI_S2M + SPI_SYN) 248 #define SPI_MLME_START_CONFIRM (MLME_START_CONFIRM + SPI_S2M + SPI_SYN) 249 250 #define SPI_HWME_SET_REQUEST (HWME_SET_REQUEST + SPI_SYN) 251 #define SPI_HWME_GET_REQUEST (HWME_GET_REQUEST + SPI_SYN) 252 #define SPI_HWME_SET_CONFIRM (HWME_SET_CONFIRM + SPI_S2M + SPI_SYN) 253 #define SPI_HWME_GET_CONFIRM (HWME_GET_CONFIRM + SPI_S2M + SPI_SYN) 254 #define SPI_HWME_WAKEUP_INDICATION (HWME_WAKEUP_INDICATION + SPI_S2M) 255 256 #define SPI_TDME_SETSFR_REQUEST (TDME_SETSFR_REQUEST + SPI_SYN) 257 #define SPI_TDME_SET_REQUEST (TDME_SET_REQUEST + SPI_SYN) 258 #define SPI_TDME_SETSFR_CONFIRM (TDME_SETSFR_CONFIRM + SPI_S2M + SPI_SYN) 259 260 /* TDME SFR addresses */ 261 /* Page 0 */ 262 #define CA8210_SFR_PACFG (0xB1) 263 #define CA8210_SFR_MACCON (0xD8) 264 #define CA8210_SFR_PACFGIB (0xFE) 265 /* Page 1 */ 266 #define CA8210_SFR_LOTXCAL (0xBF) 267 #define CA8210_SFR_PTHRH (0xD1) 268 #define CA8210_SFR_PRECFG (0xD3) 269 #define CA8210_SFR_LNAGX40 (0xE1) 270 #define CA8210_SFR_LNAGX41 (0xE2) 271 #define CA8210_SFR_LNAGX42 (0xE3) 272 #define CA8210_SFR_LNAGX43 (0xE4) 273 #define CA8210_SFR_LNAGX44 (0xE5) 274 #define CA8210_SFR_LNAGX45 (0xE6) 275 #define CA8210_SFR_LNAGX46 (0xE7) 276 #define CA8210_SFR_LNAGX47 (0xE9) 277 278 #define PACFGIB_DEFAULT_CURRENT (0x3F) 279 #define PTHRH_DEFAULT_THRESHOLD (0x5A) 280 #define LNAGX40_DEFAULT_GAIN (0x29) /* 10dB */ 281 #define LNAGX41_DEFAULT_GAIN (0x54) /* 21dB */ 282 #define LNAGX42_DEFAULT_GAIN (0x6C) /* 27dB */ 283 #define LNAGX43_DEFAULT_GAIN (0x7A) /* 30dB */ 284 #define LNAGX44_DEFAULT_GAIN (0x84) /* 33dB */ 285 #define LNAGX45_DEFAULT_GAIN (0x8B) /* 34dB */ 286 #define LNAGX46_DEFAULT_GAIN (0x92) /* 36dB */ 287 #define LNAGX47_DEFAULT_GAIN (0x96) /* 37dB */ 288 289 #define CA8210_IOCTL_HARD_RESET (0x00) 290 291 /* Structs/Enums */ 292 293 /** 294 * struct cas_control - spi transfer structure 295 * @msg: spi_message for each exchange 296 * @transfer: spi_transfer for each exchange 297 * @tx_buf: source array for transmission 298 * @tx_in_buf: array storing bytes received during transmission 299 * @priv: pointer to private data 300 * 301 * This structure stores all the necessary data passed around during a single 302 * spi exchange. 303 */ 304 struct cas_control { 305 struct spi_message msg; 306 struct spi_transfer transfer; 307 308 u8 tx_buf[CA8210_SPI_BUF_SIZE]; 309 u8 tx_in_buf[CA8210_SPI_BUF_SIZE]; 310 311 struct ca8210_priv *priv; 312 }; 313 314 /** 315 * struct ca8210_test - ca8210 test interface structure 316 * @ca8210_dfs_spi_int: pointer to the entry in the debug fs for this device 317 * @up_fifo: fifo for upstream messages 318 * 319 * This structure stores all the data pertaining to the debug interface 320 */ 321 struct ca8210_test { 322 struct dentry *ca8210_dfs_spi_int; 323 struct kfifo up_fifo; 324 wait_queue_head_t readq; 325 }; 326 327 /** 328 * struct ca8210_priv - ca8210 private data structure 329 * @spi: pointer to the ca8210 spi device object 330 * @hw: pointer to the ca8210 ieee802154_hw object 331 * @hw_registered: true if hw has been registered with ieee802154 332 * @lock: spinlock protecting the private data area 333 * @mlme_workqueue: workqueue for triggering MLME Reset 334 * @irq_workqueue: workqueue for irq processing 335 * @tx_skb: current socket buffer to transmit 336 * @nextmsduhandle: msdu handle to pass to the 15.4 MAC layer for the 337 * next transmission 338 * @clk: external clock provided by the ca8210 339 * @last_dsn: sequence number of last data packet received, for 340 * resend detection 341 * @test: test interface data section for this instance 342 * @async_tx_pending: true if an asynchronous transmission was started and 343 * is not complete 344 * @sync_command_response: pointer to buffer to fill with sync response 345 * @ca8210_is_awake: nonzero if ca8210 is initialised, ready for comms 346 * @sync_down: counts number of downstream synchronous commands 347 * @sync_up: counts number of upstream synchronous commands 348 * @spi_transfer_complete completion object for a single spi_transfer 349 * @sync_exchange_complete completion object for a complete synchronous API 350 * exchange 351 * @promiscuous whether the ca8210 is in promiscuous mode or not 352 * @retries: records how many times the current pending spi 353 * transfer has been retried 354 */ 355 struct ca8210_priv { 356 struct spi_device *spi; 357 struct ieee802154_hw *hw; 358 bool hw_registered; 359 spinlock_t lock; 360 struct workqueue_struct *mlme_workqueue; 361 struct workqueue_struct *irq_workqueue; 362 struct sk_buff *tx_skb; 363 u8 nextmsduhandle; 364 struct clk *clk; 365 int last_dsn; 366 struct ca8210_test test; 367 bool async_tx_pending; 368 u8 *sync_command_response; 369 struct completion ca8210_is_awake; 370 int sync_down, sync_up; 371 struct completion spi_transfer_complete, sync_exchange_complete; 372 bool promiscuous; 373 int retries; 374 }; 375 376 /** 377 * struct work_priv_container - link between a work object and the relevant 378 * device's private data 379 * @work: work object being executed 380 * @priv: device's private data section 381 * 382 */ 383 struct work_priv_container { 384 struct work_struct work; 385 struct ca8210_priv *priv; 386 }; 387 388 /** 389 * struct ca8210_platform_data - ca8210 platform data structure 390 * @extclockenable: true if the external clock is to be enabled 391 * @extclockfreq: frequency of the external clock 392 * @extclockgpio: ca8210 output gpio of the external clock 393 * @gpio_reset: gpio number of ca8210 reset line 394 * @gpio_irq: gpio number of ca8210 interrupt line 395 * @irq_id: identifier for the ca8210 irq 396 * 397 */ 398 struct ca8210_platform_data { 399 bool extclockenable; 400 unsigned int extclockfreq; 401 unsigned int extclockgpio; 402 int gpio_reset; 403 int gpio_irq; 404 int irq_id; 405 }; 406 407 /** 408 * struct fulladdr - full MAC addressing information structure 409 * @mode: address mode (none, short, extended) 410 * @pan_id: 16-bit LE pan id 411 * @address: LE address, variable length as specified by mode 412 * 413 */ 414 struct fulladdr { 415 u8 mode; 416 u8 pan_id[2]; 417 u8 address[8]; 418 }; 419 420 /** 421 * union macaddr: generic MAC address container 422 * @short_addr: 16-bit short address 423 * @ieee_address: 64-bit extended address as LE byte array 424 * 425 */ 426 union macaddr { 427 u16 short_address; 428 u8 ieee_address[8]; 429 }; 430 431 /** 432 * struct secspec: security specification for SAP commands 433 * @security_level: 0-7, controls level of authentication & encryption 434 * @key_id_mode: 0-3, specifies how to obtain key 435 * @key_source: extended key retrieval data 436 * @key_index: single-byte key identifier 437 * 438 */ 439 struct secspec { 440 u8 security_level; 441 u8 key_id_mode; 442 u8 key_source[8]; 443 u8 key_index; 444 }; 445 446 /* downlink functions parameter set definitions */ 447 struct mcps_data_request_pset { 448 u8 src_addr_mode; 449 struct fulladdr dst; 450 u8 msdu_length; 451 u8 msdu_handle; 452 u8 tx_options; 453 u8 msdu[MAX_DATA_SIZE]; 454 }; 455 456 struct mlme_set_request_pset { 457 u8 pib_attribute; 458 u8 pib_attribute_index; 459 u8 pib_attribute_length; 460 u8 pib_attribute_value[MAX_ATTRIBUTE_SIZE]; 461 }; 462 463 struct hwme_set_request_pset { 464 u8 hw_attribute; 465 u8 hw_attribute_length; 466 u8 hw_attribute_value[MAX_HWME_ATTRIBUTE_SIZE]; 467 }; 468 469 struct hwme_get_request_pset { 470 u8 hw_attribute; 471 }; 472 473 struct tdme_setsfr_request_pset { 474 u8 sfr_page; 475 u8 sfr_address; 476 u8 sfr_value; 477 }; 478 479 /* uplink functions parameter set definitions */ 480 struct hwme_set_confirm_pset { 481 u8 status; 482 u8 hw_attribute; 483 }; 484 485 struct hwme_get_confirm_pset { 486 u8 status; 487 u8 hw_attribute; 488 u8 hw_attribute_length; 489 u8 hw_attribute_value[MAX_HWME_ATTRIBUTE_SIZE]; 490 }; 491 492 struct tdme_setsfr_confirm_pset { 493 u8 status; 494 u8 sfr_page; 495 u8 sfr_address; 496 }; 497 498 struct mac_message { 499 u8 command_id; 500 u8 length; 501 union { 502 struct mcps_data_request_pset data_req; 503 struct mlme_set_request_pset set_req; 504 struct hwme_set_request_pset hwme_set_req; 505 struct hwme_get_request_pset hwme_get_req; 506 struct tdme_setsfr_request_pset tdme_set_sfr_req; 507 struct hwme_set_confirm_pset hwme_set_cnf; 508 struct hwme_get_confirm_pset hwme_get_cnf; 509 struct tdme_setsfr_confirm_pset tdme_set_sfr_cnf; 510 u8 u8param; 511 u8 status; 512 u8 payload[148]; 513 } pdata; 514 }; 515 516 union pa_cfg_sfr { 517 struct { 518 u8 bias_current_trim : 3; 519 u8 /* reserved */ : 1; 520 u8 buffer_capacitor_trim : 3; 521 u8 boost : 1; 522 }; 523 u8 paib; 524 }; 525 526 struct preamble_cfg_sfr { 527 u8 timeout_symbols : 3; 528 u8 acquisition_symbols : 3; 529 u8 search_symbols : 2; 530 }; 531 532 static int (*cascoda_api_upstream)( 533 const u8 *buf, 534 size_t len, 535 void *device_ref 536 ); 537 538 /** 539 * link_to_linux_err() - Translates an 802.15.4 return code into the closest 540 * linux error 541 * @link_status: 802.15.4 status code 542 * 543 * Return: 0 or Linux error code 544 */ 545 static int link_to_linux_err(int link_status) 546 { 547 if (link_status < 0) { 548 /* status is already a Linux code */ 549 return link_status; 550 } 551 switch (link_status) { 552 case MAC_SUCCESS: 553 case MAC_REALIGNMENT: 554 return 0; 555 case MAC_IMPROPER_KEY_TYPE: 556 return -EKEYREJECTED; 557 case MAC_IMPROPER_SECURITY_LEVEL: 558 case MAC_UNSUPPORTED_LEGACY: 559 case MAC_DENIED: 560 return -EACCES; 561 case MAC_BEACON_LOST: 562 case MAC_NO_ACK: 563 case MAC_NO_BEACON: 564 return -ENETUNREACH; 565 case MAC_CHANNEL_ACCESS_FAILURE: 566 case MAC_TX_ACTIVE: 567 case MAC_SCAN_IN_PROGRESS: 568 return -EBUSY; 569 case MAC_DISABLE_TRX_FAILURE: 570 case MAC_OUT_OF_CAP: 571 return -EAGAIN; 572 case MAC_FRAME_TOO_LONG: 573 return -EMSGSIZE; 574 case MAC_INVALID_GTS: 575 case MAC_PAST_TIME: 576 return -EBADSLT; 577 case MAC_INVALID_HANDLE: 578 return -EBADMSG; 579 case MAC_INVALID_PARAMETER: 580 case MAC_UNSUPPORTED_ATTRIBUTE: 581 case MAC_ON_TIME_TOO_LONG: 582 case MAC_INVALID_INDEX: 583 return -EINVAL; 584 case MAC_NO_DATA: 585 return -ENODATA; 586 case MAC_NO_SHORT_ADDRESS: 587 return -EFAULT; 588 case MAC_PAN_ID_CONFLICT: 589 return -EADDRINUSE; 590 case MAC_TRANSACTION_EXPIRED: 591 return -ETIME; 592 case MAC_TRANSACTION_OVERFLOW: 593 return -ENOBUFS; 594 case MAC_UNAVAILABLE_KEY: 595 return -ENOKEY; 596 case MAC_INVALID_ADDRESS: 597 return -ENXIO; 598 case MAC_TRACKING_OFF: 599 case MAC_SUPERFRAME_OVERLAP: 600 return -EREMOTEIO; 601 case MAC_LIMIT_REACHED: 602 return -EDQUOT; 603 case MAC_READ_ONLY: 604 return -EROFS; 605 default: 606 return -EPROTO; 607 } 608 } 609 610 /** 611 * ca8210_test_int_driver_write() - Writes a message to the test interface to be 612 * read by the userspace 613 * @buf: Buffer containing upstream message 614 * @len: length of message to write 615 * @spi: SPI device of message originator 616 * 617 * Return: 0 or linux error code 618 */ 619 static int ca8210_test_int_driver_write( 620 const u8 *buf, 621 size_t len, 622 void *spi 623 ) 624 { 625 struct ca8210_priv *priv = spi_get_drvdata(spi); 626 struct ca8210_test *test = &priv->test; 627 char *fifo_buffer; 628 int i; 629 630 dev_dbg( 631 &priv->spi->dev, 632 "test_interface: Buffering upstream message:\n" 633 ); 634 for (i = 0; i < len; i++) 635 dev_dbg(&priv->spi->dev, "%#03x\n", buf[i]); 636 637 fifo_buffer = kmalloc(len, GFP_KERNEL); 638 if (!fifo_buffer) 639 return -ENOMEM; 640 memcpy(fifo_buffer, buf, len); 641 kfifo_in(&test->up_fifo, &fifo_buffer, 4); 642 wake_up_interruptible(&priv->test.readq); 643 644 return 0; 645 } 646 647 /* SPI Operation */ 648 649 static int ca8210_net_rx( 650 struct ieee802154_hw *hw, 651 u8 *command, 652 size_t len 653 ); 654 static u8 mlme_reset_request_sync( 655 u8 set_default_pib, 656 void *device_ref 657 ); 658 static int ca8210_spi_transfer( 659 struct spi_device *spi, 660 const u8 *buf, 661 size_t len 662 ); 663 664 /** 665 * ca8210_reset_send() - Hard resets the ca8210 for a given time 666 * @spi: Pointer to target ca8210 spi device 667 * @ms: Milliseconds to hold the reset line low for 668 */ 669 static void ca8210_reset_send(struct spi_device *spi, unsigned int ms) 670 { 671 struct ca8210_platform_data *pdata = spi->dev.platform_data; 672 struct ca8210_priv *priv = spi_get_drvdata(spi); 673 long status; 674 675 gpio_set_value(pdata->gpio_reset, 0); 676 reinit_completion(&priv->ca8210_is_awake); 677 msleep(ms); 678 gpio_set_value(pdata->gpio_reset, 1); 679 priv->promiscuous = false; 680 681 /* Wait until wakeup indication seen */ 682 status = wait_for_completion_interruptible_timeout( 683 &priv->ca8210_is_awake, 684 msecs_to_jiffies(CA8210_SYNC_TIMEOUT) 685 ); 686 if (status == 0) { 687 dev_crit( 688 &spi->dev, 689 "Fatal: No wakeup from ca8210 after reset!\n" 690 ); 691 } 692 693 dev_dbg(&spi->dev, "Reset the device\n"); 694 } 695 696 /** 697 * ca8210_mlme_reset_worker() - Resets the MLME, Called when the MAC OVERFLOW 698 * condition happens. 699 * @work: Pointer to work being executed 700 */ 701 static void ca8210_mlme_reset_worker(struct work_struct *work) 702 { 703 struct work_priv_container *wpc = container_of( 704 work, 705 struct work_priv_container, 706 work 707 ); 708 struct ca8210_priv *priv = wpc->priv; 709 710 mlme_reset_request_sync(0, priv->spi); 711 kfree(wpc); 712 } 713 714 /** 715 * ca8210_rx_done() - Calls various message dispatches responding to a received 716 * command 717 * @arg: Pointer to the cas_control object for the relevant spi transfer 718 * 719 * Presents a received SAP command from the ca8210 to the Cascoda EVBME, test 720 * interface and network driver. 721 */ 722 static void ca8210_rx_done(struct cas_control *cas_ctl) 723 { 724 u8 *buf; 725 u8 len; 726 struct work_priv_container *mlme_reset_wpc; 727 struct ca8210_priv *priv = cas_ctl->priv; 728 729 buf = cas_ctl->tx_in_buf; 730 len = buf[1] + 2; 731 if (len > CA8210_SPI_BUF_SIZE) { 732 dev_crit( 733 &priv->spi->dev, 734 "Received packet len (%d) erroneously long\n", 735 len 736 ); 737 goto finish; 738 } 739 740 if (buf[0] & SPI_SYN) { 741 if (priv->sync_command_response) { 742 memcpy(priv->sync_command_response, buf, len); 743 complete(&priv->sync_exchange_complete); 744 } else { 745 if (cascoda_api_upstream) 746 cascoda_api_upstream(buf, len, priv->spi); 747 priv->sync_up++; 748 } 749 } else { 750 if (cascoda_api_upstream) 751 cascoda_api_upstream(buf, len, priv->spi); 752 } 753 754 ca8210_net_rx(priv->hw, buf, len); 755 if (buf[0] == SPI_MCPS_DATA_CONFIRM) { 756 if (buf[3] == MAC_TRANSACTION_OVERFLOW) { 757 dev_info( 758 &priv->spi->dev, 759 "Waiting for transaction overflow to stabilise...\n"); 760 msleep(2000); 761 dev_info( 762 &priv->spi->dev, 763 "Resetting MAC...\n"); 764 765 mlme_reset_wpc = kmalloc(sizeof(*mlme_reset_wpc), 766 GFP_KERNEL); 767 if (!mlme_reset_wpc) 768 goto finish; 769 INIT_WORK( 770 &mlme_reset_wpc->work, 771 ca8210_mlme_reset_worker 772 ); 773 mlme_reset_wpc->priv = priv; 774 queue_work(priv->mlme_workqueue, &mlme_reset_wpc->work); 775 } 776 } else if (buf[0] == SPI_HWME_WAKEUP_INDICATION) { 777 dev_notice( 778 &priv->spi->dev, 779 "Wakeup indication received, reason:\n" 780 ); 781 switch (buf[2]) { 782 case 0: 783 dev_notice( 784 &priv->spi->dev, 785 "Transceiver woken up from Power Up / System Reset\n" 786 ); 787 break; 788 case 1: 789 dev_notice( 790 &priv->spi->dev, 791 "Watchdog Timer Time-Out\n" 792 ); 793 break; 794 case 2: 795 dev_notice( 796 &priv->spi->dev, 797 "Transceiver woken up from Power-Off by Sleep Timer Time-Out\n"); 798 break; 799 case 3: 800 dev_notice( 801 &priv->spi->dev, 802 "Transceiver woken up from Power-Off by GPIO Activity\n" 803 ); 804 break; 805 case 4: 806 dev_notice( 807 &priv->spi->dev, 808 "Transceiver woken up from Standby by Sleep Timer Time-Out\n" 809 ); 810 break; 811 case 5: 812 dev_notice( 813 &priv->spi->dev, 814 "Transceiver woken up from Standby by GPIO Activity\n" 815 ); 816 break; 817 case 6: 818 dev_notice( 819 &priv->spi->dev, 820 "Sleep-Timer Time-Out in Active Mode\n" 821 ); 822 break; 823 default: 824 dev_warn(&priv->spi->dev, "Wakeup reason unknown\n"); 825 break; 826 } 827 complete(&priv->ca8210_is_awake); 828 } 829 830 finish:; 831 } 832 833 static int ca8210_remove(struct spi_device *spi_device); 834 835 /** 836 * ca8210_spi_transfer_complete() - Called when a single spi transfer has 837 * completed 838 * @context: Pointer to the cas_control object for the finished transfer 839 */ 840 static void ca8210_spi_transfer_complete(void *context) 841 { 842 struct cas_control *cas_ctl = context; 843 struct ca8210_priv *priv = cas_ctl->priv; 844 bool duplex_rx = false; 845 int i; 846 u8 retry_buffer[CA8210_SPI_BUF_SIZE]; 847 848 if ( 849 cas_ctl->tx_in_buf[0] == SPI_NACK || 850 (cas_ctl->tx_in_buf[0] == SPI_IDLE && 851 cas_ctl->tx_in_buf[1] == SPI_NACK) 852 ) { 853 /* ca8210 is busy */ 854 dev_info(&priv->spi->dev, "ca8210 was busy during attempted write\n"); 855 if (cas_ctl->tx_buf[0] == SPI_IDLE) { 856 dev_warn( 857 &priv->spi->dev, 858 "IRQ servicing NACKd, dropping transfer\n" 859 ); 860 kfree(cas_ctl); 861 return; 862 } 863 if (priv->retries > 3) { 864 dev_err(&priv->spi->dev, "too many retries!\n"); 865 kfree(cas_ctl); 866 ca8210_remove(priv->spi); 867 return; 868 } 869 memcpy(retry_buffer, cas_ctl->tx_buf, CA8210_SPI_BUF_SIZE); 870 kfree(cas_ctl); 871 ca8210_spi_transfer( 872 priv->spi, 873 retry_buffer, 874 CA8210_SPI_BUF_SIZE 875 ); 876 priv->retries++; 877 dev_info(&priv->spi->dev, "retried spi write\n"); 878 return; 879 } else if ( 880 cas_ctl->tx_in_buf[0] != SPI_IDLE && 881 cas_ctl->tx_in_buf[0] != SPI_NACK 882 ) { 883 duplex_rx = true; 884 } 885 886 if (duplex_rx) { 887 dev_dbg(&priv->spi->dev, "READ CMD DURING TX\n"); 888 for (i = 0; i < cas_ctl->tx_in_buf[1] + 2; i++) 889 dev_dbg( 890 &priv->spi->dev, 891 "%#03x\n", 892 cas_ctl->tx_in_buf[i] 893 ); 894 ca8210_rx_done(cas_ctl); 895 } 896 complete(&priv->spi_transfer_complete); 897 kfree(cas_ctl); 898 priv->retries = 0; 899 } 900 901 /** 902 * ca8210_spi_transfer() - Initiate duplex spi transfer with ca8210 903 * @spi: Pointer to spi device for transfer 904 * @buf: Octet array to send 905 * @len: length of the buffer being sent 906 * 907 * Return: 0 or linux error code 908 */ 909 static int ca8210_spi_transfer( 910 struct spi_device *spi, 911 const u8 *buf, 912 size_t len 913 ) 914 { 915 int i, status = 0; 916 struct ca8210_priv *priv; 917 struct cas_control *cas_ctl; 918 919 if (!spi) { 920 pr_crit("NULL spi device passed to %s\n", __func__); 921 return -ENODEV; 922 } 923 924 priv = spi_get_drvdata(spi); 925 reinit_completion(&priv->spi_transfer_complete); 926 927 dev_dbg(&spi->dev, "%s called\n", __func__); 928 929 cas_ctl = kmalloc(sizeof(*cas_ctl), GFP_ATOMIC); 930 if (!cas_ctl) 931 return -ENOMEM; 932 933 cas_ctl->priv = priv; 934 memset(cas_ctl->tx_buf, SPI_IDLE, CA8210_SPI_BUF_SIZE); 935 memset(cas_ctl->tx_in_buf, SPI_IDLE, CA8210_SPI_BUF_SIZE); 936 memcpy(cas_ctl->tx_buf, buf, len); 937 938 for (i = 0; i < len; i++) 939 dev_dbg(&spi->dev, "%#03x\n", cas_ctl->tx_buf[i]); 940 941 spi_message_init(&cas_ctl->msg); 942 943 cas_ctl->transfer.tx_nbits = 1; /* 1 MOSI line */ 944 cas_ctl->transfer.rx_nbits = 1; /* 1 MISO line */ 945 cas_ctl->transfer.speed_hz = 0; /* Use device setting */ 946 cas_ctl->transfer.bits_per_word = 0; /* Use device setting */ 947 cas_ctl->transfer.tx_buf = cas_ctl->tx_buf; 948 cas_ctl->transfer.rx_buf = cas_ctl->tx_in_buf; 949 cas_ctl->transfer.delay_usecs = 0; 950 cas_ctl->transfer.cs_change = 0; 951 cas_ctl->transfer.len = sizeof(struct mac_message); 952 cas_ctl->msg.complete = ca8210_spi_transfer_complete; 953 cas_ctl->msg.context = cas_ctl; 954 955 spi_message_add_tail( 956 &cas_ctl->transfer, 957 &cas_ctl->msg 958 ); 959 960 status = spi_async(spi, &cas_ctl->msg); 961 if (status < 0) { 962 dev_crit( 963 &spi->dev, 964 "status %d from spi_sync in write\n", 965 status 966 ); 967 } 968 969 return status; 970 } 971 972 /** 973 * ca8210_spi_exchange() - Exchange API/SAP commands with the radio 974 * @buf: Octet array of command being sent downstream 975 * @len: length of buf 976 * @response: buffer for storing synchronous response 977 * @device_ref: spi_device pointer for ca8210 978 * 979 * Effectively calls ca8210_spi_transfer to write buf[] to the spi, then for 980 * synchronous commands waits for the corresponding response to be read from 981 * the spi before returning. The response is written to the response parameter. 982 * 983 * Return: 0 or linux error code 984 */ 985 static int ca8210_spi_exchange( 986 const u8 *buf, 987 size_t len, 988 u8 *response, 989 void *device_ref 990 ) 991 { 992 int status = 0; 993 struct spi_device *spi = device_ref; 994 struct ca8210_priv *priv = spi->dev.driver_data; 995 long wait_remaining; 996 997 if ((buf[0] & SPI_SYN) && response) { /* if sync wait for confirm */ 998 reinit_completion(&priv->sync_exchange_complete); 999 priv->sync_command_response = response; 1000 } 1001 1002 do { 1003 reinit_completion(&priv->spi_transfer_complete); 1004 status = ca8210_spi_transfer(priv->spi, buf, len); 1005 if (status) { 1006 dev_warn( 1007 &spi->dev, 1008 "spi write failed, returned %d\n", 1009 status 1010 ); 1011 if (status == -EBUSY) 1012 continue; 1013 if (((buf[0] & SPI_SYN) && response)) 1014 complete(&priv->sync_exchange_complete); 1015 goto cleanup; 1016 } 1017 1018 wait_remaining = wait_for_completion_interruptible_timeout( 1019 &priv->spi_transfer_complete, 1020 msecs_to_jiffies(1000) 1021 ); 1022 if (wait_remaining == -ERESTARTSYS) { 1023 status = -ERESTARTSYS; 1024 } else if (wait_remaining == 0) { 1025 dev_err( 1026 &spi->dev, 1027 "SPI downstream transfer timed out!\n" 1028 ); 1029 status = -ETIME; 1030 goto cleanup; 1031 } 1032 } while (status < 0); 1033 1034 if (!((buf[0] & SPI_SYN) && response)) 1035 goto cleanup; 1036 1037 wait_remaining = wait_for_completion_interruptible_timeout( 1038 &priv->sync_exchange_complete, 1039 msecs_to_jiffies(CA8210_SYNC_TIMEOUT) 1040 ); 1041 if (wait_remaining == -ERESTARTSYS) { 1042 status = -ERESTARTSYS; 1043 } else if (wait_remaining == 0) { 1044 dev_err( 1045 &spi->dev, 1046 "Synchronous confirm timeout\n" 1047 ); 1048 status = -ETIME; 1049 } 1050 1051 cleanup: 1052 priv->sync_command_response = NULL; 1053 return status; 1054 } 1055 1056 /** 1057 * ca8210_interrupt_handler() - Called when an irq is received from the ca8210 1058 * @irq: Id of the irq being handled 1059 * @dev_id: Pointer passed by the system, pointing to the ca8210's private data 1060 * 1061 * This function is called when the irq line from the ca8210 is asserted, 1062 * signifying that the ca8210 has a message to send upstream to us. Starts the 1063 * asynchronous spi read. 1064 * 1065 * Return: irq return code 1066 */ 1067 static irqreturn_t ca8210_interrupt_handler(int irq, void *dev_id) 1068 { 1069 struct ca8210_priv *priv = dev_id; 1070 int status; 1071 1072 dev_dbg(&priv->spi->dev, "irq: Interrupt occurred\n"); 1073 do { 1074 status = ca8210_spi_transfer(priv->spi, NULL, 0); 1075 if (status && (status != -EBUSY)) { 1076 dev_warn( 1077 &priv->spi->dev, 1078 "spi read failed, returned %d\n", 1079 status 1080 ); 1081 } 1082 } while (status == -EBUSY); 1083 return IRQ_HANDLED; 1084 } 1085 1086 static int (*cascoda_api_downstream)( 1087 const u8 *buf, 1088 size_t len, 1089 u8 *response, 1090 void *device_ref 1091 ) = ca8210_spi_exchange; 1092 1093 /* Cascoda API / 15.4 SAP Primitives */ 1094 1095 /** 1096 * tdme_setsfr_request_sync() - TDME_SETSFR_request/confirm according to API 1097 * @sfr_page: SFR Page 1098 * @sfr_address: SFR Address 1099 * @sfr_value: SFR Value 1100 * @device_ref: Nondescript pointer to target device 1101 * 1102 * Return: 802.15.4 status code of TDME-SETSFR.confirm 1103 */ 1104 static u8 tdme_setsfr_request_sync( 1105 u8 sfr_page, 1106 u8 sfr_address, 1107 u8 sfr_value, 1108 void *device_ref 1109 ) 1110 { 1111 int ret; 1112 struct mac_message command, response; 1113 struct spi_device *spi = device_ref; 1114 1115 command.command_id = SPI_TDME_SETSFR_REQUEST; 1116 command.length = 3; 1117 command.pdata.tdme_set_sfr_req.sfr_page = sfr_page; 1118 command.pdata.tdme_set_sfr_req.sfr_address = sfr_address; 1119 command.pdata.tdme_set_sfr_req.sfr_value = sfr_value; 1120 response.command_id = SPI_IDLE; 1121 ret = cascoda_api_downstream( 1122 &command.command_id, 1123 command.length + 2, 1124 &response.command_id, 1125 device_ref 1126 ); 1127 if (ret) { 1128 dev_crit(&spi->dev, "cascoda_api_downstream returned %d", ret); 1129 return MAC_SYSTEM_ERROR; 1130 } 1131 1132 if (response.command_id != SPI_TDME_SETSFR_CONFIRM) { 1133 dev_crit( 1134 &spi->dev, 1135 "sync response to SPI_TDME_SETSFR_REQUEST was not SPI_TDME_SETSFR_CONFIRM, it was %d\n", 1136 response.command_id 1137 ); 1138 return MAC_SYSTEM_ERROR; 1139 } 1140 1141 return response.pdata.tdme_set_sfr_cnf.status; 1142 } 1143 1144 /** 1145 * tdme_chipinit() - TDME Chip Register Default Initialisation Macro 1146 * @device_ref: Nondescript pointer to target device 1147 * 1148 * Return: 802.15.4 status code of API calls 1149 */ 1150 static u8 tdme_chipinit(void *device_ref) 1151 { 1152 u8 status = MAC_SUCCESS; 1153 u8 sfr_address; 1154 struct spi_device *spi = device_ref; 1155 struct preamble_cfg_sfr pre_cfg_value = { 1156 .timeout_symbols = 3, 1157 .acquisition_symbols = 3, 1158 .search_symbols = 1, 1159 }; 1160 /* LNA Gain Settings */ 1161 status = tdme_setsfr_request_sync( 1162 1, (sfr_address = CA8210_SFR_LNAGX40), 1163 LNAGX40_DEFAULT_GAIN, device_ref); 1164 if (status) 1165 goto finish; 1166 status = tdme_setsfr_request_sync( 1167 1, (sfr_address = CA8210_SFR_LNAGX41), 1168 LNAGX41_DEFAULT_GAIN, device_ref); 1169 if (status) 1170 goto finish; 1171 status = tdme_setsfr_request_sync( 1172 1, (sfr_address = CA8210_SFR_LNAGX42), 1173 LNAGX42_DEFAULT_GAIN, device_ref); 1174 if (status) 1175 goto finish; 1176 status = tdme_setsfr_request_sync( 1177 1, (sfr_address = CA8210_SFR_LNAGX43), 1178 LNAGX43_DEFAULT_GAIN, device_ref); 1179 if (status) 1180 goto finish; 1181 status = tdme_setsfr_request_sync( 1182 1, (sfr_address = CA8210_SFR_LNAGX44), 1183 LNAGX44_DEFAULT_GAIN, device_ref); 1184 if (status) 1185 goto finish; 1186 status = tdme_setsfr_request_sync( 1187 1, (sfr_address = CA8210_SFR_LNAGX45), 1188 LNAGX45_DEFAULT_GAIN, device_ref); 1189 if (status) 1190 goto finish; 1191 status = tdme_setsfr_request_sync( 1192 1, (sfr_address = CA8210_SFR_LNAGX46), 1193 LNAGX46_DEFAULT_GAIN, device_ref); 1194 if (status) 1195 goto finish; 1196 status = tdme_setsfr_request_sync( 1197 1, (sfr_address = CA8210_SFR_LNAGX47), 1198 LNAGX47_DEFAULT_GAIN, device_ref); 1199 if (status) 1200 goto finish; 1201 /* Preamble Timing Config */ 1202 status = tdme_setsfr_request_sync( 1203 1, (sfr_address = CA8210_SFR_PRECFG), 1204 *((u8 *)&pre_cfg_value), device_ref); 1205 if (status) 1206 goto finish; 1207 /* Preamble Threshold High */ 1208 status = tdme_setsfr_request_sync( 1209 1, (sfr_address = CA8210_SFR_PTHRH), 1210 PTHRH_DEFAULT_THRESHOLD, device_ref); 1211 if (status) 1212 goto finish; 1213 /* Tx Output Power 8 dBm */ 1214 status = tdme_setsfr_request_sync( 1215 0, (sfr_address = CA8210_SFR_PACFGIB), 1216 PACFGIB_DEFAULT_CURRENT, device_ref); 1217 if (status) 1218 goto finish; 1219 1220 finish: 1221 if (status != MAC_SUCCESS) { 1222 dev_err( 1223 &spi->dev, 1224 "failed to set sfr at %#03x, status = %#03x\n", 1225 sfr_address, 1226 status 1227 ); 1228 } 1229 return status; 1230 } 1231 1232 /** 1233 * tdme_channelinit() - TDME Channel Register Default Initialisation Macro (Tx) 1234 * @channel: 802.15.4 channel to initialise chip for 1235 * @device_ref: Nondescript pointer to target device 1236 * 1237 * Return: 802.15.4 status code of API calls 1238 */ 1239 static u8 tdme_channelinit(u8 channel, void *device_ref) 1240 { 1241 /* Transceiver front-end local oscillator tx two-point calibration 1242 * value. Tuned for the hardware. 1243 */ 1244 u8 txcalval; 1245 1246 if (channel >= 25) 1247 txcalval = 0xA7; 1248 else if (channel >= 23) 1249 txcalval = 0xA8; 1250 else if (channel >= 22) 1251 txcalval = 0xA9; 1252 else if (channel >= 20) 1253 txcalval = 0xAA; 1254 else if (channel >= 17) 1255 txcalval = 0xAB; 1256 else if (channel >= 16) 1257 txcalval = 0xAC; 1258 else if (channel >= 14) 1259 txcalval = 0xAD; 1260 else if (channel >= 12) 1261 txcalval = 0xAE; 1262 else 1263 txcalval = 0xAF; 1264 1265 return tdme_setsfr_request_sync( 1266 1, 1267 CA8210_SFR_LOTXCAL, 1268 txcalval, 1269 device_ref 1270 ); /* LO Tx Cal */ 1271 } 1272 1273 /** 1274 * tdme_checkpibattribute() - Checks Attribute Values that are not checked in 1275 * MAC 1276 * @pib_attribute: Attribute Number 1277 * @pib_attribute_length: Attribute length 1278 * @pib_attribute_value: Pointer to Attribute Value 1279 * @device_ref: Nondescript pointer to target device 1280 * 1281 * Return: 802.15.4 status code of checks 1282 */ 1283 static u8 tdme_checkpibattribute( 1284 u8 pib_attribute, 1285 u8 pib_attribute_length, 1286 const void *pib_attribute_value 1287 ) 1288 { 1289 u8 status = MAC_SUCCESS; 1290 u8 value; 1291 1292 value = *((u8 *)pib_attribute_value); 1293 1294 switch (pib_attribute) { 1295 /* PHY */ 1296 case PHY_TRANSMIT_POWER: 1297 if (value > 0x3F) 1298 status = MAC_INVALID_PARAMETER; 1299 break; 1300 case PHY_CCA_MODE: 1301 if (value > 0x03) 1302 status = MAC_INVALID_PARAMETER; 1303 break; 1304 /* MAC */ 1305 case MAC_BATT_LIFE_EXT_PERIODS: 1306 if (value < 6 || value > 41) 1307 status = MAC_INVALID_PARAMETER; 1308 break; 1309 case MAC_BEACON_PAYLOAD: 1310 if (pib_attribute_length > MAX_BEACON_PAYLOAD_LENGTH) 1311 status = MAC_INVALID_PARAMETER; 1312 break; 1313 case MAC_BEACON_PAYLOAD_LENGTH: 1314 if (value > MAX_BEACON_PAYLOAD_LENGTH) 1315 status = MAC_INVALID_PARAMETER; 1316 break; 1317 case MAC_BEACON_ORDER: 1318 if (value > 15) 1319 status = MAC_INVALID_PARAMETER; 1320 break; 1321 case MAC_MAX_BE: 1322 if (value < 3 || value > 8) 1323 status = MAC_INVALID_PARAMETER; 1324 break; 1325 case MAC_MAX_CSMA_BACKOFFS: 1326 if (value > 5) 1327 status = MAC_INVALID_PARAMETER; 1328 break; 1329 case MAC_MAX_FRAME_RETRIES: 1330 if (value > 7) 1331 status = MAC_INVALID_PARAMETER; 1332 break; 1333 case MAC_MIN_BE: 1334 if (value > 8) 1335 status = MAC_INVALID_PARAMETER; 1336 break; 1337 case MAC_RESPONSE_WAIT_TIME: 1338 if (value < 2 || value > 64) 1339 status = MAC_INVALID_PARAMETER; 1340 break; 1341 case MAC_SUPERFRAME_ORDER: 1342 if (value > 15) 1343 status = MAC_INVALID_PARAMETER; 1344 break; 1345 /* boolean */ 1346 case MAC_ASSOCIATED_PAN_COORD: 1347 case MAC_ASSOCIATION_PERMIT: 1348 case MAC_AUTO_REQUEST: 1349 case MAC_BATT_LIFE_EXT: 1350 case MAC_GTS_PERMIT: 1351 case MAC_PROMISCUOUS_MODE: 1352 case MAC_RX_ON_WHEN_IDLE: 1353 case MAC_SECURITY_ENABLED: 1354 if (value > 1) 1355 status = MAC_INVALID_PARAMETER; 1356 break; 1357 /* MAC SEC */ 1358 case MAC_AUTO_REQUEST_SECURITY_LEVEL: 1359 if (value > 7) 1360 status = MAC_INVALID_PARAMETER; 1361 break; 1362 case MAC_AUTO_REQUEST_KEY_ID_MODE: 1363 if (value > 3) 1364 status = MAC_INVALID_PARAMETER; 1365 break; 1366 default: 1367 break; 1368 } 1369 1370 return status; 1371 } 1372 1373 /** 1374 * tdme_settxpower() - Sets the tx power for MLME_SET phyTransmitPower 1375 * @txp: Transmit Power 1376 * @device_ref: Nondescript pointer to target device 1377 * 1378 * Normalised to 802.15.4 Definition (6-bit, signed): 1379 * Bit 7-6: not used 1380 * Bit 5-0: tx power (-32 - +31 dB) 1381 * 1382 * Return: 802.15.4 status code of api calls 1383 */ 1384 static u8 tdme_settxpower(u8 txp, void *device_ref) 1385 { 1386 u8 status; 1387 s8 txp_val; 1388 u8 txp_ext; 1389 union pa_cfg_sfr pa_cfg_val; 1390 1391 /* extend from 6 to 8 bit */ 1392 txp_ext = 0x3F & txp; 1393 if (txp_ext & 0x20) 1394 txp_ext += 0xC0; 1395 txp_val = (s8)txp_ext; 1396 1397 if (CA8210_MAC_MPW) { 1398 if (txp_val > 0) { 1399 /* 8 dBm: ptrim = 5, itrim = +3 => +4 dBm */ 1400 pa_cfg_val.bias_current_trim = 3; 1401 pa_cfg_val.buffer_capacitor_trim = 5; 1402 pa_cfg_val.boost = 1; 1403 } else { 1404 /* 0 dBm: ptrim = 7, itrim = +3 => -6 dBm */ 1405 pa_cfg_val.bias_current_trim = 3; 1406 pa_cfg_val.buffer_capacitor_trim = 7; 1407 pa_cfg_val.boost = 0; 1408 } 1409 /* write PACFG */ 1410 status = tdme_setsfr_request_sync( 1411 0, 1412 CA8210_SFR_PACFG, 1413 pa_cfg_val.paib, 1414 device_ref 1415 ); 1416 } else { 1417 /* Look-Up Table for Setting Current and Frequency Trim values 1418 * for desired Output Power 1419 */ 1420 if (txp_val > 8) { 1421 pa_cfg_val.paib = 0x3F; 1422 } else if (txp_val == 8) { 1423 pa_cfg_val.paib = 0x32; 1424 } else if (txp_val == 7) { 1425 pa_cfg_val.paib = 0x22; 1426 } else if (txp_val == 6) { 1427 pa_cfg_val.paib = 0x18; 1428 } else if (txp_val == 5) { 1429 pa_cfg_val.paib = 0x10; 1430 } else if (txp_val == 4) { 1431 pa_cfg_val.paib = 0x0C; 1432 } else if (txp_val == 3) { 1433 pa_cfg_val.paib = 0x08; 1434 } else if (txp_val == 2) { 1435 pa_cfg_val.paib = 0x05; 1436 } else if (txp_val == 1) { 1437 pa_cfg_val.paib = 0x03; 1438 } else if (txp_val == 0) { 1439 pa_cfg_val.paib = 0x01; 1440 } else { /* < 0 */ 1441 pa_cfg_val.paib = 0x00; 1442 } 1443 /* write PACFGIB */ 1444 status = tdme_setsfr_request_sync( 1445 0, 1446 CA8210_SFR_PACFGIB, 1447 pa_cfg_val.paib, 1448 device_ref 1449 ); 1450 } 1451 1452 return status; 1453 } 1454 1455 /** 1456 * mcps_data_request() - mcps_data_request (Send Data) according to API Spec 1457 * @src_addr_mode: Source Addressing Mode 1458 * @dst_address_mode: Destination Addressing Mode 1459 * @dst_pan_id: Destination PAN ID 1460 * @dst_addr: Pointer to Destination Address 1461 * @msdu_length: length of Data 1462 * @msdu: Pointer to Data 1463 * @msdu_handle: Handle of Data 1464 * @tx_options: Tx Options Bit Field 1465 * @security: Pointer to Security Structure or NULL 1466 * @device_ref: Nondescript pointer to target device 1467 * 1468 * Return: 802.15.4 status code of action 1469 */ 1470 static u8 mcps_data_request( 1471 u8 src_addr_mode, 1472 u8 dst_address_mode, 1473 u16 dst_pan_id, 1474 union macaddr *dst_addr, 1475 u8 msdu_length, 1476 u8 *msdu, 1477 u8 msdu_handle, 1478 u8 tx_options, 1479 struct secspec *security, 1480 void *device_ref 1481 ) 1482 { 1483 struct secspec *psec; 1484 struct mac_message command; 1485 1486 command.command_id = SPI_MCPS_DATA_REQUEST; 1487 command.pdata.data_req.src_addr_mode = src_addr_mode; 1488 command.pdata.data_req.dst.mode = dst_address_mode; 1489 if (dst_address_mode != MAC_MODE_NO_ADDR) { 1490 command.pdata.data_req.dst.pan_id[0] = LS_BYTE(dst_pan_id); 1491 command.pdata.data_req.dst.pan_id[1] = MS_BYTE(dst_pan_id); 1492 if (dst_address_mode == MAC_MODE_SHORT_ADDR) { 1493 command.pdata.data_req.dst.address[0] = LS_BYTE( 1494 dst_addr->short_address 1495 ); 1496 command.pdata.data_req.dst.address[1] = MS_BYTE( 1497 dst_addr->short_address 1498 ); 1499 } else { /* MAC_MODE_LONG_ADDR*/ 1500 memcpy( 1501 command.pdata.data_req.dst.address, 1502 dst_addr->ieee_address, 1503 8 1504 ); 1505 } 1506 } 1507 command.pdata.data_req.msdu_length = msdu_length; 1508 command.pdata.data_req.msdu_handle = msdu_handle; 1509 command.pdata.data_req.tx_options = tx_options; 1510 memcpy(command.pdata.data_req.msdu, msdu, msdu_length); 1511 psec = (struct secspec *)(command.pdata.data_req.msdu + msdu_length); 1512 command.length = sizeof(struct mcps_data_request_pset) - 1513 MAX_DATA_SIZE + msdu_length; 1514 if (!security || security->security_level == 0) { 1515 psec->security_level = 0; 1516 command.length += 1; 1517 } else { 1518 *psec = *security; 1519 command.length += sizeof(struct secspec); 1520 } 1521 1522 if (ca8210_spi_transfer(device_ref, &command.command_id, 1523 command.length + 2)) 1524 return MAC_SYSTEM_ERROR; 1525 1526 return MAC_SUCCESS; 1527 } 1528 1529 /** 1530 * mlme_reset_request_sync() - MLME_RESET_request/confirm according to API Spec 1531 * @set_default_pib: Set defaults in PIB 1532 * @device_ref: Nondescript pointer to target device 1533 * 1534 * Return: 802.15.4 status code of MLME-RESET.confirm 1535 */ 1536 static u8 mlme_reset_request_sync( 1537 u8 set_default_pib, 1538 void *device_ref 1539 ) 1540 { 1541 u8 status; 1542 struct mac_message command, response; 1543 struct spi_device *spi = device_ref; 1544 1545 command.command_id = SPI_MLME_RESET_REQUEST; 1546 command.length = 1; 1547 command.pdata.u8param = set_default_pib; 1548 1549 if (cascoda_api_downstream( 1550 &command.command_id, 1551 command.length + 2, 1552 &response.command_id, 1553 device_ref)) { 1554 dev_err(&spi->dev, "cascoda_api_downstream failed\n"); 1555 return MAC_SYSTEM_ERROR; 1556 } 1557 1558 if (response.command_id != SPI_MLME_RESET_CONFIRM) 1559 return MAC_SYSTEM_ERROR; 1560 1561 status = response.pdata.status; 1562 1563 /* reset COORD Bit for Channel Filtering as Coordinator */ 1564 if (CA8210_MAC_WORKAROUNDS && set_default_pib && !status) { 1565 status = tdme_setsfr_request_sync( 1566 0, 1567 CA8210_SFR_MACCON, 1568 0, 1569 device_ref 1570 ); 1571 } 1572 1573 return status; 1574 } 1575 1576 /** 1577 * mlme_set_request_sync() - MLME_SET_request/confirm according to API Spec 1578 * @pib_attribute: Attribute Number 1579 * @pib_attribute_index: Index within Attribute if an Array 1580 * @pib_attribute_length: Attribute length 1581 * @pib_attribute_value: Pointer to Attribute Value 1582 * @device_ref: Nondescript pointer to target device 1583 * 1584 * Return: 802.15.4 status code of MLME-SET.confirm 1585 */ 1586 static u8 mlme_set_request_sync( 1587 u8 pib_attribute, 1588 u8 pib_attribute_index, 1589 u8 pib_attribute_length, 1590 const void *pib_attribute_value, 1591 void *device_ref 1592 ) 1593 { 1594 u8 status; 1595 struct mac_message command, response; 1596 1597 /* pre-check the validity of pib_attribute values that are not checked 1598 * in MAC 1599 */ 1600 if (tdme_checkpibattribute( 1601 pib_attribute, pib_attribute_length, pib_attribute_value)) { 1602 return MAC_INVALID_PARAMETER; 1603 } 1604 1605 if (pib_attribute == PHY_CURRENT_CHANNEL) { 1606 status = tdme_channelinit( 1607 *((u8 *)pib_attribute_value), 1608 device_ref 1609 ); 1610 if (status) 1611 return status; 1612 } 1613 1614 if (pib_attribute == PHY_TRANSMIT_POWER) { 1615 return tdme_settxpower( 1616 *((u8 *)pib_attribute_value), 1617 device_ref 1618 ); 1619 } 1620 1621 command.command_id = SPI_MLME_SET_REQUEST; 1622 command.length = sizeof(struct mlme_set_request_pset) - 1623 MAX_ATTRIBUTE_SIZE + pib_attribute_length; 1624 command.pdata.set_req.pib_attribute = pib_attribute; 1625 command.pdata.set_req.pib_attribute_index = pib_attribute_index; 1626 command.pdata.set_req.pib_attribute_length = pib_attribute_length; 1627 memcpy( 1628 command.pdata.set_req.pib_attribute_value, 1629 pib_attribute_value, 1630 pib_attribute_length 1631 ); 1632 1633 if (cascoda_api_downstream( 1634 &command.command_id, 1635 command.length + 2, 1636 &response.command_id, 1637 device_ref)) { 1638 return MAC_SYSTEM_ERROR; 1639 } 1640 1641 if (response.command_id != SPI_MLME_SET_CONFIRM) 1642 return MAC_SYSTEM_ERROR; 1643 1644 return response.pdata.status; 1645 } 1646 1647 /** 1648 * hwme_set_request_sync() - HWME_SET_request/confirm according to API Spec 1649 * @hw_attribute: Attribute Number 1650 * @hw_attribute_length: Attribute length 1651 * @hw_attribute_value: Pointer to Attribute Value 1652 * @device_ref: Nondescript pointer to target device 1653 * 1654 * Return: 802.15.4 status code of HWME-SET.confirm 1655 */ 1656 static u8 hwme_set_request_sync( 1657 u8 hw_attribute, 1658 u8 hw_attribute_length, 1659 u8 *hw_attribute_value, 1660 void *device_ref 1661 ) 1662 { 1663 struct mac_message command, response; 1664 1665 command.command_id = SPI_HWME_SET_REQUEST; 1666 command.length = 2 + hw_attribute_length; 1667 command.pdata.hwme_set_req.hw_attribute = hw_attribute; 1668 command.pdata.hwme_set_req.hw_attribute_length = hw_attribute_length; 1669 memcpy( 1670 command.pdata.hwme_set_req.hw_attribute_value, 1671 hw_attribute_value, 1672 hw_attribute_length 1673 ); 1674 1675 if (cascoda_api_downstream( 1676 &command.command_id, 1677 command.length + 2, 1678 &response.command_id, 1679 device_ref)) { 1680 return MAC_SYSTEM_ERROR; 1681 } 1682 1683 if (response.command_id != SPI_HWME_SET_CONFIRM) 1684 return MAC_SYSTEM_ERROR; 1685 1686 return response.pdata.hwme_set_cnf.status; 1687 } 1688 1689 /** 1690 * hwme_get_request_sync() - HWME_GET_request/confirm according to API Spec 1691 * @hw_attribute: Attribute Number 1692 * @hw_attribute_length: Attribute length 1693 * @hw_attribute_value: Pointer to Attribute Value 1694 * @device_ref: Nondescript pointer to target device 1695 * 1696 * Return: 802.15.4 status code of HWME-GET.confirm 1697 */ 1698 static u8 hwme_get_request_sync( 1699 u8 hw_attribute, 1700 u8 *hw_attribute_length, 1701 u8 *hw_attribute_value, 1702 void *device_ref 1703 ) 1704 { 1705 struct mac_message command, response; 1706 1707 command.command_id = SPI_HWME_GET_REQUEST; 1708 command.length = 1; 1709 command.pdata.hwme_get_req.hw_attribute = hw_attribute; 1710 1711 if (cascoda_api_downstream( 1712 &command.command_id, 1713 command.length + 2, 1714 &response.command_id, 1715 device_ref)) { 1716 return MAC_SYSTEM_ERROR; 1717 } 1718 1719 if (response.command_id != SPI_HWME_GET_CONFIRM) 1720 return MAC_SYSTEM_ERROR; 1721 1722 if (response.pdata.hwme_get_cnf.status == MAC_SUCCESS) { 1723 *hw_attribute_length = 1724 response.pdata.hwme_get_cnf.hw_attribute_length; 1725 memcpy( 1726 hw_attribute_value, 1727 response.pdata.hwme_get_cnf.hw_attribute_value, 1728 *hw_attribute_length 1729 ); 1730 } 1731 1732 return response.pdata.hwme_get_cnf.status; 1733 } 1734 1735 /* Network driver operation */ 1736 1737 /** 1738 * ca8210_async_xmit_complete() - Called to announce that an asynchronous 1739 * transmission has finished 1740 * @hw: ieee802154_hw of ca8210 that has finished exchange 1741 * @msduhandle: Identifier of transmission that has completed 1742 * @status: Returned 802.15.4 status code of the transmission 1743 * 1744 * Return: 0 or linux error code 1745 */ 1746 static int ca8210_async_xmit_complete( 1747 struct ieee802154_hw *hw, 1748 u8 msduhandle, 1749 u8 status) 1750 { 1751 struct ca8210_priv *priv = hw->priv; 1752 1753 if (priv->nextmsduhandle != msduhandle) { 1754 dev_err( 1755 &priv->spi->dev, 1756 "Unexpected msdu_handle on data confirm, Expected %d, got %d\n", 1757 priv->nextmsduhandle, 1758 msduhandle 1759 ); 1760 return -EIO; 1761 } 1762 1763 priv->async_tx_pending = false; 1764 priv->nextmsduhandle++; 1765 1766 if (status) { 1767 dev_err( 1768 &priv->spi->dev, 1769 "Link transmission unsuccessful, status = %d\n", 1770 status 1771 ); 1772 if (status != MAC_TRANSACTION_OVERFLOW) { 1773 ieee802154_wake_queue(priv->hw); 1774 return 0; 1775 } 1776 } 1777 ieee802154_xmit_complete(priv->hw, priv->tx_skb, true); 1778 1779 return 0; 1780 } 1781 1782 /** 1783 * ca8210_skb_rx() - Contructs a properly framed socket buffer from a received 1784 * MCPS_DATA_indication 1785 * @hw: ieee802154_hw that MCPS_DATA_indication was received by 1786 * @len: length of MCPS_DATA_indication 1787 * @data_ind: Octet array of MCPS_DATA_indication 1788 * 1789 * Called by the spi driver whenever a SAP command is received, this function 1790 * will ascertain whether the command is of interest to the network driver and 1791 * take necessary action. 1792 * 1793 * Return: 0 or linux error code 1794 */ 1795 static int ca8210_skb_rx( 1796 struct ieee802154_hw *hw, 1797 size_t len, 1798 u8 *data_ind 1799 ) 1800 { 1801 struct ieee802154_hdr hdr; 1802 int msdulen; 1803 int hlen; 1804 u8 mpdulinkquality = data_ind[23]; 1805 struct sk_buff *skb; 1806 struct ca8210_priv *priv = hw->priv; 1807 1808 /* Allocate mtu size buffer for every rx packet */ 1809 skb = dev_alloc_skb(IEEE802154_MTU + sizeof(hdr)); 1810 if (!skb) 1811 return -ENOMEM; 1812 1813 skb_reserve(skb, sizeof(hdr)); 1814 1815 msdulen = data_ind[22]; /* msdu_length */ 1816 if (msdulen > IEEE802154_MTU) { 1817 dev_err( 1818 &priv->spi->dev, 1819 "received erroneously large msdu length!\n" 1820 ); 1821 kfree_skb(skb); 1822 return -EMSGSIZE; 1823 } 1824 dev_dbg(&priv->spi->dev, "skb buffer length = %d\n", msdulen); 1825 1826 if (priv->promiscuous) 1827 goto copy_payload; 1828 1829 /* Populate hdr */ 1830 hdr.sec.level = data_ind[29 + msdulen]; 1831 dev_dbg(&priv->spi->dev, "security level: %#03x\n", hdr.sec.level); 1832 if (hdr.sec.level > 0) { 1833 hdr.sec.key_id_mode = data_ind[30 + msdulen]; 1834 memcpy(&hdr.sec.extended_src, &data_ind[31 + msdulen], 8); 1835 hdr.sec.key_id = data_ind[39 + msdulen]; 1836 } 1837 hdr.source.mode = data_ind[0]; 1838 dev_dbg(&priv->spi->dev, "srcAddrMode: %#03x\n", hdr.source.mode); 1839 hdr.source.pan_id = *(u16 *)&data_ind[1]; 1840 dev_dbg(&priv->spi->dev, "srcPanId: %#06x\n", hdr.source.pan_id); 1841 memcpy(&hdr.source.extended_addr, &data_ind[3], 8); 1842 hdr.dest.mode = data_ind[11]; 1843 dev_dbg(&priv->spi->dev, "dstAddrMode: %#03x\n", hdr.dest.mode); 1844 hdr.dest.pan_id = *(u16 *)&data_ind[12]; 1845 dev_dbg(&priv->spi->dev, "dstPanId: %#06x\n", hdr.dest.pan_id); 1846 memcpy(&hdr.dest.extended_addr, &data_ind[14], 8); 1847 1848 /* Fill in FC implicitly */ 1849 hdr.fc.type = 1; /* Data frame */ 1850 if (hdr.sec.level) 1851 hdr.fc.security_enabled = 1; 1852 else 1853 hdr.fc.security_enabled = 0; 1854 if (data_ind[1] != data_ind[12] || data_ind[2] != data_ind[13]) 1855 hdr.fc.intra_pan = 1; 1856 else 1857 hdr.fc.intra_pan = 0; 1858 hdr.fc.dest_addr_mode = hdr.dest.mode; 1859 hdr.fc.source_addr_mode = hdr.source.mode; 1860 1861 /* Add hdr to front of buffer */ 1862 hlen = ieee802154_hdr_push(skb, &hdr); 1863 1864 if (hlen < 0) { 1865 dev_crit(&priv->spi->dev, "failed to push mac hdr onto skb!\n"); 1866 kfree_skb(skb); 1867 return hlen; 1868 } 1869 1870 skb_reset_mac_header(skb); 1871 skb->mac_len = hlen; 1872 1873 copy_payload: 1874 /* Add <msdulen> bytes of space to the back of the buffer */ 1875 /* Copy msdu to skb */ 1876 skb_put_data(skb, &data_ind[29], msdulen); 1877 1878 ieee802154_rx_irqsafe(hw, skb, mpdulinkquality); 1879 return 0; 1880 } 1881 1882 /** 1883 * ca8210_net_rx() - Acts upon received SAP commands relevant to the network 1884 * driver 1885 * @hw: ieee802154_hw that command was received by 1886 * @command: Octet array of received command 1887 * @len: length of the received command 1888 * 1889 * Called by the spi driver whenever a SAP command is received, this function 1890 * will ascertain whether the command is of interest to the network driver and 1891 * take necessary action. 1892 * 1893 * Return: 0 or linux error code 1894 */ 1895 static int ca8210_net_rx(struct ieee802154_hw *hw, u8 *command, size_t len) 1896 { 1897 struct ca8210_priv *priv = hw->priv; 1898 unsigned long flags; 1899 u8 status; 1900 1901 dev_dbg(&priv->spi->dev, "%s: CmdID = %d\n", __func__, command[0]); 1902 1903 if (command[0] == SPI_MCPS_DATA_INDICATION) { 1904 /* Received data */ 1905 spin_lock_irqsave(&priv->lock, flags); 1906 if (command[26] == priv->last_dsn) { 1907 dev_dbg( 1908 &priv->spi->dev, 1909 "DSN %d resend received, ignoring...\n", 1910 command[26] 1911 ); 1912 spin_unlock_irqrestore(&priv->lock, flags); 1913 return 0; 1914 } 1915 priv->last_dsn = command[26]; 1916 spin_unlock_irqrestore(&priv->lock, flags); 1917 return ca8210_skb_rx(hw, len - 2, command + 2); 1918 } else if (command[0] == SPI_MCPS_DATA_CONFIRM) { 1919 status = command[3]; 1920 if (priv->async_tx_pending) { 1921 return ca8210_async_xmit_complete( 1922 hw, 1923 command[2], 1924 status 1925 ); 1926 } 1927 } 1928 1929 return 0; 1930 } 1931 1932 /** 1933 * ca8210_skb_tx() - Transmits a given socket buffer using the ca8210 1934 * @skb: Socket buffer to transmit 1935 * @msduhandle: Data identifier to pass to the 802.15.4 MAC 1936 * @priv: Pointer to private data section of target ca8210 1937 * 1938 * Return: 0 or linux error code 1939 */ 1940 static int ca8210_skb_tx( 1941 struct sk_buff *skb, 1942 u8 msduhandle, 1943 struct ca8210_priv *priv 1944 ) 1945 { 1946 int status; 1947 struct ieee802154_hdr header = { }; 1948 struct secspec secspec; 1949 unsigned int mac_len; 1950 1951 dev_dbg(&priv->spi->dev, "%s called\n", __func__); 1952 1953 /* Get addressing info from skb - ieee802154 layer creates a full 1954 * packet 1955 */ 1956 mac_len = ieee802154_hdr_peek_addrs(skb, &header); 1957 1958 secspec.security_level = header.sec.level; 1959 secspec.key_id_mode = header.sec.key_id_mode; 1960 if (secspec.key_id_mode == 2) 1961 memcpy(secspec.key_source, &header.sec.short_src, 4); 1962 else if (secspec.key_id_mode == 3) 1963 memcpy(secspec.key_source, &header.sec.extended_src, 8); 1964 secspec.key_index = header.sec.key_id; 1965 1966 /* Pass to Cascoda API */ 1967 status = mcps_data_request( 1968 header.source.mode, 1969 header.dest.mode, 1970 header.dest.pan_id, 1971 (union macaddr *)&header.dest.extended_addr, 1972 skb->len - mac_len, 1973 &skb->data[mac_len], 1974 msduhandle, 1975 header.fc.ack_request, 1976 &secspec, 1977 priv->spi 1978 ); 1979 return link_to_linux_err(status); 1980 } 1981 1982 /** 1983 * ca8210_start() - Starts the network driver 1984 * @hw: ieee802154_hw of ca8210 being started 1985 * 1986 * Return: 0 or linux error code 1987 */ 1988 static int ca8210_start(struct ieee802154_hw *hw) 1989 { 1990 int status; 1991 u8 rx_on_when_idle; 1992 u8 lqi_threshold = 0; 1993 struct ca8210_priv *priv = hw->priv; 1994 1995 priv->last_dsn = -1; 1996 /* Turn receiver on when idle for now just to test rx */ 1997 rx_on_when_idle = 1; 1998 status = mlme_set_request_sync( 1999 MAC_RX_ON_WHEN_IDLE, 2000 0, 2001 1, 2002 &rx_on_when_idle, 2003 priv->spi 2004 ); 2005 if (status) { 2006 dev_crit( 2007 &priv->spi->dev, 2008 "Setting rx_on_when_idle failed, status = %d\n", 2009 status 2010 ); 2011 return link_to_linux_err(status); 2012 } 2013 status = hwme_set_request_sync( 2014 HWME_LQILIMIT, 2015 1, 2016 &lqi_threshold, 2017 priv->spi 2018 ); 2019 if (status) { 2020 dev_crit( 2021 &priv->spi->dev, 2022 "Setting lqilimit failed, status = %d\n", 2023 status 2024 ); 2025 return link_to_linux_err(status); 2026 } 2027 2028 return 0; 2029 } 2030 2031 /** 2032 * ca8210_stop() - Stops the network driver 2033 * @hw: ieee802154_hw of ca8210 being stopped 2034 * 2035 * Return: 0 or linux error code 2036 */ 2037 static void ca8210_stop(struct ieee802154_hw *hw) 2038 { 2039 } 2040 2041 /** 2042 * ca8210_xmit_async() - Asynchronously transmits a given socket buffer using 2043 * the ca8210 2044 * @hw: ieee802154_hw of ca8210 to transmit from 2045 * @skb: Socket buffer to transmit 2046 * 2047 * Return: 0 or linux error code 2048 */ 2049 static int ca8210_xmit_async(struct ieee802154_hw *hw, struct sk_buff *skb) 2050 { 2051 struct ca8210_priv *priv = hw->priv; 2052 int status; 2053 2054 dev_dbg(&priv->spi->dev, "calling %s\n", __func__); 2055 2056 priv->tx_skb = skb; 2057 priv->async_tx_pending = true; 2058 status = ca8210_skb_tx(skb, priv->nextmsduhandle, priv); 2059 return status; 2060 } 2061 2062 /** 2063 * ca8210_get_ed() - Returns the measured energy on the current channel at this 2064 * instant in time 2065 * @hw: ieee802154_hw of target ca8210 2066 * @level: Measured Energy Detect level 2067 * 2068 * Return: 0 or linux error code 2069 */ 2070 static int ca8210_get_ed(struct ieee802154_hw *hw, u8 *level) 2071 { 2072 u8 lenvar; 2073 struct ca8210_priv *priv = hw->priv; 2074 2075 return link_to_linux_err( 2076 hwme_get_request_sync(HWME_EDVALUE, &lenvar, level, priv->spi) 2077 ); 2078 } 2079 2080 /** 2081 * ca8210_set_channel() - Sets the current operating 802.15.4 channel of the 2082 * ca8210 2083 * @hw: ieee802154_hw of target ca8210 2084 * @page: Channel page to set 2085 * @channel: Channel number to set 2086 * 2087 * Return: 0 or linux error code 2088 */ 2089 static int ca8210_set_channel( 2090 struct ieee802154_hw *hw, 2091 u8 page, 2092 u8 channel 2093 ) 2094 { 2095 u8 status; 2096 struct ca8210_priv *priv = hw->priv; 2097 2098 status = mlme_set_request_sync( 2099 PHY_CURRENT_CHANNEL, 2100 0, 2101 1, 2102 &channel, 2103 priv->spi 2104 ); 2105 if (status) { 2106 dev_err( 2107 &priv->spi->dev, 2108 "error setting channel, MLME-SET.confirm status = %d\n", 2109 status 2110 ); 2111 } 2112 return link_to_linux_err(status); 2113 } 2114 2115 /** 2116 * ca8210_set_hw_addr_filt() - Sets the address filtering parameters of the 2117 * ca8210 2118 * @hw: ieee802154_hw of target ca8210 2119 * @filt: Filtering parameters 2120 * @changed: Bitmap representing which parameters to change 2121 * 2122 * Effectively just sets the actual addressing information identifying this node 2123 * as all filtering is performed by the ca8210 as detailed in the IEEE 802.15.4 2124 * 2006 specification. 2125 * 2126 * Return: 0 or linux error code 2127 */ 2128 static int ca8210_set_hw_addr_filt( 2129 struct ieee802154_hw *hw, 2130 struct ieee802154_hw_addr_filt *filt, 2131 unsigned long changed 2132 ) 2133 { 2134 u8 status = 0; 2135 struct ca8210_priv *priv = hw->priv; 2136 2137 if (changed & IEEE802154_AFILT_PANID_CHANGED) { 2138 status = mlme_set_request_sync( 2139 MAC_PAN_ID, 2140 0, 2141 2, 2142 &filt->pan_id, priv->spi 2143 ); 2144 if (status) { 2145 dev_err( 2146 &priv->spi->dev, 2147 "error setting pan id, MLME-SET.confirm status = %d", 2148 status 2149 ); 2150 return link_to_linux_err(status); 2151 } 2152 } 2153 if (changed & IEEE802154_AFILT_SADDR_CHANGED) { 2154 status = mlme_set_request_sync( 2155 MAC_SHORT_ADDRESS, 2156 0, 2157 2, 2158 &filt->short_addr, priv->spi 2159 ); 2160 if (status) { 2161 dev_err( 2162 &priv->spi->dev, 2163 "error setting short address, MLME-SET.confirm status = %d", 2164 status 2165 ); 2166 return link_to_linux_err(status); 2167 } 2168 } 2169 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) { 2170 status = mlme_set_request_sync( 2171 NS_IEEE_ADDRESS, 2172 0, 2173 8, 2174 &filt->ieee_addr, 2175 priv->spi 2176 ); 2177 if (status) { 2178 dev_err( 2179 &priv->spi->dev, 2180 "error setting ieee address, MLME-SET.confirm status = %d", 2181 status 2182 ); 2183 return link_to_linux_err(status); 2184 } 2185 } 2186 /* TODO: Should use MLME_START to set coord bit? */ 2187 return 0; 2188 } 2189 2190 /** 2191 * ca8210_set_tx_power() - Sets the transmit power of the ca8210 2192 * @hw: ieee802154_hw of target ca8210 2193 * @mbm: Transmit power in mBm (dBm*100) 2194 * 2195 * Return: 0 or linux error code 2196 */ 2197 static int ca8210_set_tx_power(struct ieee802154_hw *hw, s32 mbm) 2198 { 2199 struct ca8210_priv *priv = hw->priv; 2200 2201 mbm /= 100; 2202 return link_to_linux_err( 2203 mlme_set_request_sync(PHY_TRANSMIT_POWER, 0, 1, &mbm, priv->spi) 2204 ); 2205 } 2206 2207 /** 2208 * ca8210_set_cca_mode() - Sets the clear channel assessment mode of the ca8210 2209 * @hw: ieee802154_hw of target ca8210 2210 * @cca: CCA mode to set 2211 * 2212 * Return: 0 or linux error code 2213 */ 2214 static int ca8210_set_cca_mode( 2215 struct ieee802154_hw *hw, 2216 const struct wpan_phy_cca *cca 2217 ) 2218 { 2219 u8 status; 2220 u8 cca_mode; 2221 struct ca8210_priv *priv = hw->priv; 2222 2223 cca_mode = cca->mode & 3; 2224 if (cca_mode == 3 && cca->opt == NL802154_CCA_OPT_ENERGY_CARRIER_OR) { 2225 /* cca_mode 0 == CS OR ED, 3 == CS AND ED */ 2226 cca_mode = 0; 2227 } 2228 status = mlme_set_request_sync( 2229 PHY_CCA_MODE, 2230 0, 2231 1, 2232 &cca_mode, 2233 priv->spi 2234 ); 2235 if (status) { 2236 dev_err( 2237 &priv->spi->dev, 2238 "error setting cca mode, MLME-SET.confirm status = %d", 2239 status 2240 ); 2241 } 2242 return link_to_linux_err(status); 2243 } 2244 2245 /** 2246 * ca8210_set_cca_ed_level() - Sets the CCA ED level of the ca8210 2247 * @hw: ieee802154_hw of target ca8210 2248 * @level: ED level to set (in mbm) 2249 * 2250 * Sets the minimum threshold of measured energy above which the ca8210 will 2251 * back off and retry a transmission. 2252 * 2253 * Return: 0 or linux error code 2254 */ 2255 static int ca8210_set_cca_ed_level(struct ieee802154_hw *hw, s32 level) 2256 { 2257 u8 status; 2258 u8 ed_threshold = (level / 100) * 2 + 256; 2259 struct ca8210_priv *priv = hw->priv; 2260 2261 status = hwme_set_request_sync( 2262 HWME_EDTHRESHOLD, 2263 1, 2264 &ed_threshold, 2265 priv->spi 2266 ); 2267 if (status) { 2268 dev_err( 2269 &priv->spi->dev, 2270 "error setting ed threshold, HWME-SET.confirm status = %d", 2271 status 2272 ); 2273 } 2274 return link_to_linux_err(status); 2275 } 2276 2277 /** 2278 * ca8210_set_csma_params() - Sets the CSMA parameters of the ca8210 2279 * @hw: ieee802154_hw of target ca8210 2280 * @min_be: Minimum backoff exponent when backing off a transmission 2281 * @max_be: Maximum backoff exponent when backing off a transmission 2282 * @retries: Number of times to retry after backing off 2283 * 2284 * Return: 0 or linux error code 2285 */ 2286 static int ca8210_set_csma_params( 2287 struct ieee802154_hw *hw, 2288 u8 min_be, 2289 u8 max_be, 2290 u8 retries 2291 ) 2292 { 2293 u8 status; 2294 struct ca8210_priv *priv = hw->priv; 2295 2296 status = mlme_set_request_sync(MAC_MIN_BE, 0, 1, &min_be, priv->spi); 2297 if (status) { 2298 dev_err( 2299 &priv->spi->dev, 2300 "error setting min be, MLME-SET.confirm status = %d", 2301 status 2302 ); 2303 return link_to_linux_err(status); 2304 } 2305 status = mlme_set_request_sync(MAC_MAX_BE, 0, 1, &max_be, priv->spi); 2306 if (status) { 2307 dev_err( 2308 &priv->spi->dev, 2309 "error setting max be, MLME-SET.confirm status = %d", 2310 status 2311 ); 2312 return link_to_linux_err(status); 2313 } 2314 status = mlme_set_request_sync( 2315 MAC_MAX_CSMA_BACKOFFS, 2316 0, 2317 1, 2318 &retries, 2319 priv->spi 2320 ); 2321 if (status) { 2322 dev_err( 2323 &priv->spi->dev, 2324 "error setting max csma backoffs, MLME-SET.confirm status = %d", 2325 status 2326 ); 2327 } 2328 return link_to_linux_err(status); 2329 } 2330 2331 /** 2332 * ca8210_set_frame_retries() - Sets the maximum frame retries of the ca8210 2333 * @hw: ieee802154_hw of target ca8210 2334 * @retries: Number of retries 2335 * 2336 * Sets the number of times to retry a transmission if no acknowledgment was 2337 * was received from the other end when one was requested. 2338 * 2339 * Return: 0 or linux error code 2340 */ 2341 static int ca8210_set_frame_retries(struct ieee802154_hw *hw, s8 retries) 2342 { 2343 u8 status; 2344 struct ca8210_priv *priv = hw->priv; 2345 2346 status = mlme_set_request_sync( 2347 MAC_MAX_FRAME_RETRIES, 2348 0, 2349 1, 2350 &retries, 2351 priv->spi 2352 ); 2353 if (status) { 2354 dev_err( 2355 &priv->spi->dev, 2356 "error setting frame retries, MLME-SET.confirm status = %d", 2357 status 2358 ); 2359 } 2360 return link_to_linux_err(status); 2361 } 2362 2363 static int ca8210_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on) 2364 { 2365 u8 status; 2366 struct ca8210_priv *priv = hw->priv; 2367 2368 status = mlme_set_request_sync( 2369 MAC_PROMISCUOUS_MODE, 2370 0, 2371 1, 2372 (const void *)&on, 2373 priv->spi 2374 ); 2375 if (status) { 2376 dev_err( 2377 &priv->spi->dev, 2378 "error setting promiscuous mode, MLME-SET.confirm status = %d", 2379 status 2380 ); 2381 } else { 2382 priv->promiscuous = on; 2383 } 2384 return link_to_linux_err(status); 2385 } 2386 2387 static const struct ieee802154_ops ca8210_phy_ops = { 2388 .start = ca8210_start, 2389 .stop = ca8210_stop, 2390 .xmit_async = ca8210_xmit_async, 2391 .ed = ca8210_get_ed, 2392 .set_channel = ca8210_set_channel, 2393 .set_hw_addr_filt = ca8210_set_hw_addr_filt, 2394 .set_txpower = ca8210_set_tx_power, 2395 .set_cca_mode = ca8210_set_cca_mode, 2396 .set_cca_ed_level = ca8210_set_cca_ed_level, 2397 .set_csma_params = ca8210_set_csma_params, 2398 .set_frame_retries = ca8210_set_frame_retries, 2399 .set_promiscuous_mode = ca8210_set_promiscuous_mode 2400 }; 2401 2402 /* Test/EVBME Interface */ 2403 2404 /** 2405 * ca8210_test_int_open() - Opens the test interface to the userspace 2406 * @inodp: inode representation of file interface 2407 * @filp: file interface 2408 * 2409 * Return: 0 or linux error code 2410 */ 2411 static int ca8210_test_int_open(struct inode *inodp, struct file *filp) 2412 { 2413 struct ca8210_priv *priv = inodp->i_private; 2414 2415 filp->private_data = priv; 2416 return 0; 2417 } 2418 2419 /** 2420 * ca8210_test_check_upstream() - Checks a command received from the upstream 2421 * testing interface for required action 2422 * @buf: Buffer containing command to check 2423 * @device_ref: Nondescript pointer to target device 2424 * 2425 * Return: 0 or linux error code 2426 */ 2427 static int ca8210_test_check_upstream(u8 *buf, void *device_ref) 2428 { 2429 int ret; 2430 u8 response[CA8210_SPI_BUF_SIZE]; 2431 2432 if (buf[0] == SPI_MLME_SET_REQUEST) { 2433 ret = tdme_checkpibattribute(buf[2], buf[4], buf + 5); 2434 if (ret) { 2435 response[0] = SPI_MLME_SET_CONFIRM; 2436 response[1] = 3; 2437 response[2] = MAC_INVALID_PARAMETER; 2438 response[3] = buf[2]; 2439 response[4] = buf[3]; 2440 if (cascoda_api_upstream) 2441 cascoda_api_upstream(response, 5, device_ref); 2442 return ret; 2443 } 2444 } 2445 if (buf[0] == SPI_MLME_ASSOCIATE_REQUEST) { 2446 return tdme_channelinit(buf[2], device_ref); 2447 } else if (buf[0] == SPI_MLME_START_REQUEST) { 2448 return tdme_channelinit(buf[4], device_ref); 2449 } else if ( 2450 (buf[0] == SPI_MLME_SET_REQUEST) && 2451 (buf[2] == PHY_CURRENT_CHANNEL) 2452 ) { 2453 return tdme_channelinit(buf[5], device_ref); 2454 } else if ( 2455 (buf[0] == SPI_TDME_SET_REQUEST) && 2456 (buf[2] == TDME_CHANNEL) 2457 ) { 2458 return tdme_channelinit(buf[4], device_ref); 2459 } else if ( 2460 (CA8210_MAC_WORKAROUNDS) && 2461 (buf[0] == SPI_MLME_RESET_REQUEST) && 2462 (buf[2] == 1) 2463 ) { 2464 /* reset COORD Bit for Channel Filtering as Coordinator */ 2465 return tdme_setsfr_request_sync( 2466 0, 2467 CA8210_SFR_MACCON, 2468 0, 2469 device_ref 2470 ); 2471 } 2472 return 0; 2473 } /* End of EVBMECheckSerialCommand() */ 2474 2475 /** 2476 * ca8210_test_int_user_write() - Called by a process in userspace to send a 2477 * message to the ca8210 drivers 2478 * @filp: file interface 2479 * @in_buf: Buffer containing message to write 2480 * @len: length of message 2481 * @off: file offset 2482 * 2483 * Return: 0 or linux error code 2484 */ 2485 static ssize_t ca8210_test_int_user_write( 2486 struct file *filp, 2487 const char __user *in_buf, 2488 size_t len, 2489 loff_t *off 2490 ) 2491 { 2492 int ret; 2493 struct ca8210_priv *priv = filp->private_data; 2494 u8 command[CA8210_SPI_BUF_SIZE]; 2495 2496 if (len > CA8210_SPI_BUF_SIZE) { 2497 dev_warn( 2498 &priv->spi->dev, 2499 "userspace requested erroneously long write (%zu)\n", 2500 len 2501 ); 2502 return -EMSGSIZE; 2503 } 2504 2505 ret = copy_from_user(command, in_buf, len); 2506 if (ret) { 2507 dev_err( 2508 &priv->spi->dev, 2509 "%d bytes could not be copied from userspace\n", 2510 ret 2511 ); 2512 return -EIO; 2513 } 2514 2515 ret = ca8210_test_check_upstream(command, priv->spi); 2516 if (ret == 0) { 2517 ret = ca8210_spi_exchange( 2518 command, 2519 command[1] + 2, 2520 NULL, 2521 priv->spi 2522 ); 2523 if (ret < 0) { 2524 /* effectively 0 bytes were written successfully */ 2525 dev_err( 2526 &priv->spi->dev, 2527 "spi exchange failed\n" 2528 ); 2529 return ret; 2530 } 2531 if (command[0] & SPI_SYN) 2532 priv->sync_down++; 2533 } 2534 2535 return len; 2536 } 2537 2538 /** 2539 * ca8210_test_int_user_read() - Called by a process in userspace to read a 2540 * message from the ca8210 drivers 2541 * @filp: file interface 2542 * @buf: Buffer to write message to 2543 * @len: length of message to read (ignored) 2544 * @offp: file offset 2545 * 2546 * If the O_NONBLOCK flag was set when opening the file then this function will 2547 * not block, i.e. it will return if the fifo is empty. Otherwise the function 2548 * will block, i.e. wait until new data arrives. 2549 * 2550 * Return: number of bytes read 2551 */ 2552 static ssize_t ca8210_test_int_user_read( 2553 struct file *filp, 2554 char __user *buf, 2555 size_t len, 2556 loff_t *offp 2557 ) 2558 { 2559 int i, cmdlen; 2560 struct ca8210_priv *priv = filp->private_data; 2561 unsigned char *fifo_buffer; 2562 unsigned long bytes_not_copied; 2563 2564 if (filp->f_flags & O_NONBLOCK) { 2565 /* Non-blocking mode */ 2566 if (kfifo_is_empty(&priv->test.up_fifo)) 2567 return 0; 2568 } else { 2569 /* Blocking mode */ 2570 wait_event_interruptible( 2571 priv->test.readq, 2572 !kfifo_is_empty(&priv->test.up_fifo) 2573 ); 2574 } 2575 2576 if (kfifo_out(&priv->test.up_fifo, &fifo_buffer, 4) != 4) { 2577 dev_err( 2578 &priv->spi->dev, 2579 "test_interface: Wrong number of elements popped from upstream fifo\n" 2580 ); 2581 return 0; 2582 } 2583 cmdlen = fifo_buffer[1]; 2584 bytes_not_copied = cmdlen + 2; 2585 2586 bytes_not_copied = copy_to_user(buf, fifo_buffer, bytes_not_copied); 2587 if (bytes_not_copied > 0) { 2588 dev_err( 2589 &priv->spi->dev, 2590 "%lu bytes could not be copied to user space!\n", 2591 bytes_not_copied 2592 ); 2593 } 2594 2595 dev_dbg(&priv->spi->dev, "test_interface: Cmd len = %d\n", cmdlen); 2596 2597 dev_dbg(&priv->spi->dev, "test_interface: Read\n"); 2598 for (i = 0; i < cmdlen + 2; i++) 2599 dev_dbg(&priv->spi->dev, "%#03x\n", fifo_buffer[i]); 2600 2601 kfree(fifo_buffer); 2602 2603 return cmdlen + 2; 2604 } 2605 2606 /** 2607 * ca8210_test_int_ioctl() - Called by a process in userspace to enact an 2608 * arbitrary action 2609 * @filp: file interface 2610 * @ioctl_num: which action to enact 2611 * @ioctl_param: arbitrary parameter for the action 2612 * 2613 * Return: status 2614 */ 2615 static long ca8210_test_int_ioctl( 2616 struct file *filp, 2617 unsigned int ioctl_num, 2618 unsigned long ioctl_param 2619 ) 2620 { 2621 struct ca8210_priv *priv = filp->private_data; 2622 2623 switch (ioctl_num) { 2624 case CA8210_IOCTL_HARD_RESET: 2625 ca8210_reset_send(priv->spi, ioctl_param); 2626 break; 2627 default: 2628 break; 2629 } 2630 return 0; 2631 } 2632 2633 /** 2634 * ca8210_test_int_poll() - Called by a process in userspace to determine which 2635 * actions are currently possible for the file 2636 * @filp: file interface 2637 * @ptable: poll table 2638 * 2639 * Return: set of poll return flags 2640 */ 2641 static __poll_t ca8210_test_int_poll( 2642 struct file *filp, 2643 struct poll_table_struct *ptable 2644 ) 2645 { 2646 __poll_t return_flags = 0; 2647 struct ca8210_priv *priv = filp->private_data; 2648 2649 poll_wait(filp, &priv->test.readq, ptable); 2650 if (!kfifo_is_empty(&priv->test.up_fifo)) 2651 return_flags |= (EPOLLIN | EPOLLRDNORM); 2652 if (wait_event_interruptible( 2653 priv->test.readq, 2654 !kfifo_is_empty(&priv->test.up_fifo))) { 2655 return EPOLLERR; 2656 } 2657 return return_flags; 2658 } 2659 2660 static const struct file_operations test_int_fops = { 2661 .read = ca8210_test_int_user_read, 2662 .write = ca8210_test_int_user_write, 2663 .open = ca8210_test_int_open, 2664 .release = NULL, 2665 .unlocked_ioctl = ca8210_test_int_ioctl, 2666 .poll = ca8210_test_int_poll 2667 }; 2668 2669 /* Init/Deinit */ 2670 2671 /** 2672 * ca8210_get_platform_data() - Populate a ca8210_platform_data object 2673 * @spi_device: Pointer to ca8210 spi device object to get data for 2674 * @pdata: Pointer to ca8210_platform_data object to populate 2675 * 2676 * Return: 0 or linux error code 2677 */ 2678 static int ca8210_get_platform_data( 2679 struct spi_device *spi_device, 2680 struct ca8210_platform_data *pdata 2681 ) 2682 { 2683 int ret = 0; 2684 2685 if (!spi_device->dev.of_node) 2686 return -EINVAL; 2687 2688 pdata->extclockenable = of_property_read_bool( 2689 spi_device->dev.of_node, 2690 "extclock-enable" 2691 ); 2692 if (pdata->extclockenable) { 2693 ret = of_property_read_u32( 2694 spi_device->dev.of_node, 2695 "extclock-freq", 2696 &pdata->extclockfreq 2697 ); 2698 if (ret < 0) 2699 return ret; 2700 2701 ret = of_property_read_u32( 2702 spi_device->dev.of_node, 2703 "extclock-gpio", 2704 &pdata->extclockgpio 2705 ); 2706 } 2707 2708 return ret; 2709 } 2710 2711 /** 2712 * ca8210_config_extern_clk() - Configure the external clock provided by the 2713 * ca8210 2714 * @pdata: Pointer to ca8210_platform_data containing clock parameters 2715 * @spi: Pointer to target ca8210 spi device 2716 * @on: True to turn the clock on, false to turn off 2717 * 2718 * The external clock is configured with a frequency and output pin taken from 2719 * the platform data. 2720 * 2721 * Return: 0 or linux error code 2722 */ 2723 static int ca8210_config_extern_clk( 2724 struct ca8210_platform_data *pdata, 2725 struct spi_device *spi, 2726 bool on 2727 ) 2728 { 2729 u8 clkparam[2]; 2730 2731 if (on) { 2732 dev_info(&spi->dev, "Switching external clock on\n"); 2733 switch (pdata->extclockfreq) { 2734 case SIXTEEN_MHZ: 2735 clkparam[0] = 1; 2736 break; 2737 case EIGHT_MHZ: 2738 clkparam[0] = 2; 2739 break; 2740 case FOUR_MHZ: 2741 clkparam[0] = 3; 2742 break; 2743 case TWO_MHZ: 2744 clkparam[0] = 4; 2745 break; 2746 case ONE_MHZ: 2747 clkparam[0] = 5; 2748 break; 2749 default: 2750 dev_crit(&spi->dev, "Invalid extclock-freq\n"); 2751 return -EINVAL; 2752 } 2753 clkparam[1] = pdata->extclockgpio; 2754 } else { 2755 dev_info(&spi->dev, "Switching external clock off\n"); 2756 clkparam[0] = 0; /* off */ 2757 clkparam[1] = 0; 2758 } 2759 return link_to_linux_err( 2760 hwme_set_request_sync(HWME_SYSCLKOUT, 2, clkparam, spi) 2761 ); 2762 } 2763 2764 /** 2765 * ca8210_register_ext_clock() - Register ca8210's external clock with kernel 2766 * @spi: Pointer to target ca8210 spi device 2767 * 2768 * Return: 0 or linux error code 2769 */ 2770 static int ca8210_register_ext_clock(struct spi_device *spi) 2771 { 2772 struct device_node *np = spi->dev.of_node; 2773 struct ca8210_priv *priv = spi_get_drvdata(spi); 2774 struct ca8210_platform_data *pdata = spi->dev.platform_data; 2775 int ret = 0; 2776 2777 if (!np) 2778 return -EFAULT; 2779 2780 priv->clk = clk_register_fixed_rate( 2781 &spi->dev, 2782 np->name, 2783 NULL, 2784 0, 2785 pdata->extclockfreq 2786 ); 2787 2788 if (IS_ERR(priv->clk)) { 2789 dev_crit(&spi->dev, "Failed to register external clk\n"); 2790 return PTR_ERR(priv->clk); 2791 } 2792 ret = of_clk_add_provider(np, of_clk_src_simple_get, priv->clk); 2793 if (ret) { 2794 clk_unregister(priv->clk); 2795 dev_crit( 2796 &spi->dev, 2797 "Failed to register external clock as clock provider\n" 2798 ); 2799 } else { 2800 dev_info(&spi->dev, "External clock set as clock provider\n"); 2801 } 2802 2803 return ret; 2804 } 2805 2806 /** 2807 * ca8210_unregister_ext_clock() - Unregister ca8210's external clock with 2808 * kernel 2809 * @spi: Pointer to target ca8210 spi device 2810 */ 2811 static void ca8210_unregister_ext_clock(struct spi_device *spi) 2812 { 2813 struct ca8210_priv *priv = spi_get_drvdata(spi); 2814 2815 if (!priv->clk) 2816 return 2817 2818 of_clk_del_provider(spi->dev.of_node); 2819 clk_unregister(priv->clk); 2820 dev_info(&spi->dev, "External clock unregistered\n"); 2821 } 2822 2823 /** 2824 * ca8210_reset_init() - Initialise the reset input to the ca8210 2825 * @spi: Pointer to target ca8210 spi device 2826 * 2827 * Return: 0 or linux error code 2828 */ 2829 static int ca8210_reset_init(struct spi_device *spi) 2830 { 2831 int ret; 2832 struct ca8210_platform_data *pdata = spi->dev.platform_data; 2833 2834 pdata->gpio_reset = of_get_named_gpio( 2835 spi->dev.of_node, 2836 "reset-gpio", 2837 0 2838 ); 2839 2840 ret = gpio_direction_output(pdata->gpio_reset, 1); 2841 if (ret < 0) { 2842 dev_crit( 2843 &spi->dev, 2844 "Reset GPIO %d did not set to output mode\n", 2845 pdata->gpio_reset 2846 ); 2847 } 2848 2849 return ret; 2850 } 2851 2852 /** 2853 * ca8210_interrupt_init() - Initialise the irq output from the ca8210 2854 * @spi: Pointer to target ca8210 spi device 2855 * 2856 * Return: 0 or linux error code 2857 */ 2858 static int ca8210_interrupt_init(struct spi_device *spi) 2859 { 2860 int ret; 2861 struct ca8210_platform_data *pdata = spi->dev.platform_data; 2862 2863 pdata->gpio_irq = of_get_named_gpio( 2864 spi->dev.of_node, 2865 "irq-gpio", 2866 0 2867 ); 2868 2869 pdata->irq_id = gpio_to_irq(pdata->gpio_irq); 2870 if (pdata->irq_id < 0) { 2871 dev_crit( 2872 &spi->dev, 2873 "Could not get irq for gpio pin %d\n", 2874 pdata->gpio_irq 2875 ); 2876 gpio_free(pdata->gpio_irq); 2877 return pdata->irq_id; 2878 } 2879 2880 ret = request_irq( 2881 pdata->irq_id, 2882 ca8210_interrupt_handler, 2883 IRQF_TRIGGER_FALLING, 2884 "ca8210-irq", 2885 spi_get_drvdata(spi) 2886 ); 2887 if (ret) { 2888 dev_crit(&spi->dev, "request_irq %d failed\n", pdata->irq_id); 2889 gpio_unexport(pdata->gpio_irq); 2890 gpio_free(pdata->gpio_irq); 2891 } 2892 2893 return ret; 2894 } 2895 2896 /** 2897 * ca8210_dev_com_init() - Initialise the spi communication component 2898 * @priv: Pointer to private data structure 2899 * 2900 * Return: 0 or linux error code 2901 */ 2902 static int ca8210_dev_com_init(struct ca8210_priv *priv) 2903 { 2904 priv->mlme_workqueue = alloc_ordered_workqueue( 2905 "MLME work queue", 2906 WQ_UNBOUND 2907 ); 2908 if (!priv->mlme_workqueue) { 2909 dev_crit(&priv->spi->dev, "alloc of mlme_workqueue failed!\n"); 2910 return -ENOMEM; 2911 } 2912 2913 priv->irq_workqueue = alloc_ordered_workqueue( 2914 "ca8210 irq worker", 2915 WQ_UNBOUND 2916 ); 2917 if (!priv->irq_workqueue) { 2918 dev_crit(&priv->spi->dev, "alloc of irq_workqueue failed!\n"); 2919 return -ENOMEM; 2920 } 2921 2922 return 0; 2923 } 2924 2925 /** 2926 * ca8210_dev_com_clear() - Deinitialise the spi communication component 2927 * @priv: Pointer to private data structure 2928 */ 2929 static void ca8210_dev_com_clear(struct ca8210_priv *priv) 2930 { 2931 flush_workqueue(priv->mlme_workqueue); 2932 destroy_workqueue(priv->mlme_workqueue); 2933 flush_workqueue(priv->irq_workqueue); 2934 destroy_workqueue(priv->irq_workqueue); 2935 } 2936 2937 #define CA8210_MAX_TX_POWERS (9) 2938 static const s32 ca8210_tx_powers[CA8210_MAX_TX_POWERS] = { 2939 800, 700, 600, 500, 400, 300, 200, 100, 0 2940 }; 2941 2942 #define CA8210_MAX_ED_LEVELS (21) 2943 static const s32 ca8210_ed_levels[CA8210_MAX_ED_LEVELS] = { 2944 -10300, -10250, -10200, -10150, -10100, -10050, -10000, -9950, -9900, 2945 -9850, -9800, -9750, -9700, -9650, -9600, -9550, -9500, -9450, -9400, 2946 -9350, -9300 2947 }; 2948 2949 /** 2950 * ca8210_hw_setup() - Populate the ieee802154_hw phy attributes with the 2951 * ca8210's defaults 2952 * @ca8210_hw: Pointer to ieee802154_hw to populate 2953 */ 2954 static void ca8210_hw_setup(struct ieee802154_hw *ca8210_hw) 2955 { 2956 /* Support channels 11-26 */ 2957 ca8210_hw->phy->supported.channels[0] = CA8210_VALID_CHANNELS; 2958 ca8210_hw->phy->supported.tx_powers_size = CA8210_MAX_TX_POWERS; 2959 ca8210_hw->phy->supported.tx_powers = ca8210_tx_powers; 2960 ca8210_hw->phy->supported.cca_ed_levels_size = CA8210_MAX_ED_LEVELS; 2961 ca8210_hw->phy->supported.cca_ed_levels = ca8210_ed_levels; 2962 ca8210_hw->phy->current_channel = 18; 2963 ca8210_hw->phy->current_page = 0; 2964 ca8210_hw->phy->transmit_power = 800; 2965 ca8210_hw->phy->cca.mode = NL802154_CCA_ENERGY_CARRIER; 2966 ca8210_hw->phy->cca.opt = NL802154_CCA_OPT_ENERGY_CARRIER_AND; 2967 ca8210_hw->phy->cca_ed_level = -9800; 2968 ca8210_hw->phy->symbol_duration = 16; 2969 ca8210_hw->phy->lifs_period = 40; 2970 ca8210_hw->phy->sifs_period = 12; 2971 ca8210_hw->flags = 2972 IEEE802154_HW_AFILT | 2973 IEEE802154_HW_OMIT_CKSUM | 2974 IEEE802154_HW_FRAME_RETRIES | 2975 IEEE802154_HW_PROMISCUOUS | 2976 IEEE802154_HW_CSMA_PARAMS; 2977 ca8210_hw->phy->flags = 2978 WPAN_PHY_FLAG_TXPOWER | 2979 WPAN_PHY_FLAG_CCA_ED_LEVEL | 2980 WPAN_PHY_FLAG_CCA_MODE; 2981 } 2982 2983 /** 2984 * ca8210_test_interface_init() - Initialise the test file interface 2985 * @priv: Pointer to private data structure 2986 * 2987 * Provided as an alternative to the standard linux network interface, the test 2988 * interface exposes a file in the filesystem (ca8210_test) that allows 2989 * 802.15.4 SAP Commands and Cascoda EVBME commands to be sent directly to 2990 * the stack. 2991 * 2992 * Return: 0 or linux error code 2993 */ 2994 static int ca8210_test_interface_init(struct ca8210_priv *priv) 2995 { 2996 struct ca8210_test *test = &priv->test; 2997 char node_name[32]; 2998 2999 snprintf( 3000 node_name, 3001 sizeof(node_name), 3002 "ca8210@%d_%d", 3003 priv->spi->master->bus_num, 3004 priv->spi->chip_select 3005 ); 3006 3007 test->ca8210_dfs_spi_int = debugfs_create_file( 3008 node_name, 3009 0600, /* S_IRUSR | S_IWUSR */ 3010 NULL, 3011 priv, 3012 &test_int_fops 3013 ); 3014 if (IS_ERR(test->ca8210_dfs_spi_int)) { 3015 dev_err( 3016 &priv->spi->dev, 3017 "Error %ld when creating debugfs node\n", 3018 PTR_ERR(test->ca8210_dfs_spi_int) 3019 ); 3020 return PTR_ERR(test->ca8210_dfs_spi_int); 3021 } 3022 debugfs_create_symlink("ca8210", NULL, node_name); 3023 init_waitqueue_head(&test->readq); 3024 return kfifo_alloc( 3025 &test->up_fifo, 3026 CA8210_TEST_INT_FIFO_SIZE, 3027 GFP_KERNEL 3028 ); 3029 } 3030 3031 /** 3032 * ca8210_test_interface_clear() - Deinitialise the test file interface 3033 * @priv: Pointer to private data structure 3034 */ 3035 static void ca8210_test_interface_clear(struct ca8210_priv *priv) 3036 { 3037 struct ca8210_test *test = &priv->test; 3038 3039 if (!IS_ERR(test->ca8210_dfs_spi_int)) 3040 debugfs_remove(test->ca8210_dfs_spi_int); 3041 kfifo_free(&test->up_fifo); 3042 dev_info(&priv->spi->dev, "Test interface removed\n"); 3043 } 3044 3045 /** 3046 * ca8210_remove() - Shut down a ca8210 upon being disconnected 3047 * @priv: Pointer to private data structure 3048 * 3049 * Return: 0 or linux error code 3050 */ 3051 static int ca8210_remove(struct spi_device *spi_device) 3052 { 3053 struct ca8210_priv *priv; 3054 struct ca8210_platform_data *pdata; 3055 3056 dev_info(&spi_device->dev, "Removing ca8210\n"); 3057 3058 pdata = spi_device->dev.platform_data; 3059 if (pdata) { 3060 if (pdata->extclockenable) { 3061 ca8210_unregister_ext_clock(spi_device); 3062 ca8210_config_extern_clk(pdata, spi_device, 0); 3063 } 3064 free_irq(pdata->irq_id, spi_device->dev.driver_data); 3065 kfree(pdata); 3066 spi_device->dev.platform_data = NULL; 3067 } 3068 /* get spi_device private data */ 3069 priv = spi_get_drvdata(spi_device); 3070 if (priv) { 3071 dev_info( 3072 &spi_device->dev, 3073 "sync_down = %d, sync_up = %d\n", 3074 priv->sync_down, 3075 priv->sync_up 3076 ); 3077 ca8210_dev_com_clear(spi_device->dev.driver_data); 3078 if (priv->hw) { 3079 if (priv->hw_registered) 3080 ieee802154_unregister_hw(priv->hw); 3081 ieee802154_free_hw(priv->hw); 3082 priv->hw = NULL; 3083 dev_info( 3084 &spi_device->dev, 3085 "Unregistered & freed ieee802154_hw.\n" 3086 ); 3087 } 3088 if (IS_ENABLED(CONFIG_IEEE802154_CA8210_DEBUGFS)) 3089 ca8210_test_interface_clear(priv); 3090 } 3091 3092 return 0; 3093 } 3094 3095 /** 3096 * ca8210_probe() - Set up a connected ca8210 upon being detected by the system 3097 * @priv: Pointer to private data structure 3098 * 3099 * Return: 0 or linux error code 3100 */ 3101 static int ca8210_probe(struct spi_device *spi_device) 3102 { 3103 struct ca8210_priv *priv; 3104 struct ieee802154_hw *hw; 3105 struct ca8210_platform_data *pdata; 3106 int ret; 3107 3108 dev_info(&spi_device->dev, "Inserting ca8210\n"); 3109 3110 /* allocate ieee802154_hw and private data */ 3111 hw = ieee802154_alloc_hw(sizeof(struct ca8210_priv), &ca8210_phy_ops); 3112 if (!hw) { 3113 dev_crit(&spi_device->dev, "ieee802154_alloc_hw failed\n"); 3114 ret = -ENOMEM; 3115 goto error; 3116 } 3117 3118 priv = hw->priv; 3119 priv->hw = hw; 3120 priv->spi = spi_device; 3121 hw->parent = &spi_device->dev; 3122 spin_lock_init(&priv->lock); 3123 priv->async_tx_pending = false; 3124 priv->hw_registered = false; 3125 priv->sync_up = 0; 3126 priv->sync_down = 0; 3127 priv->promiscuous = false; 3128 priv->retries = 0; 3129 init_completion(&priv->ca8210_is_awake); 3130 init_completion(&priv->spi_transfer_complete); 3131 init_completion(&priv->sync_exchange_complete); 3132 spi_set_drvdata(priv->spi, priv); 3133 if (IS_ENABLED(CONFIG_IEEE802154_CA8210_DEBUGFS)) { 3134 cascoda_api_upstream = ca8210_test_int_driver_write; 3135 ca8210_test_interface_init(priv); 3136 } else { 3137 cascoda_api_upstream = NULL; 3138 } 3139 ca8210_hw_setup(hw); 3140 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr); 3141 3142 pdata = kmalloc(sizeof(*pdata), GFP_KERNEL); 3143 if (!pdata) { 3144 ret = -ENOMEM; 3145 goto error; 3146 } 3147 3148 ret = ca8210_get_platform_data(priv->spi, pdata); 3149 if (ret) { 3150 dev_crit(&spi_device->dev, "ca8210_get_platform_data failed\n"); 3151 goto error; 3152 } 3153 priv->spi->dev.platform_data = pdata; 3154 3155 ret = ca8210_dev_com_init(priv); 3156 if (ret) { 3157 dev_crit(&spi_device->dev, "ca8210_dev_com_init failed\n"); 3158 goto error; 3159 } 3160 ret = ca8210_reset_init(priv->spi); 3161 if (ret) { 3162 dev_crit(&spi_device->dev, "ca8210_reset_init failed\n"); 3163 goto error; 3164 } 3165 3166 ret = ca8210_interrupt_init(priv->spi); 3167 if (ret) { 3168 dev_crit(&spi_device->dev, "ca8210_interrupt_init failed\n"); 3169 goto error; 3170 } 3171 3172 msleep(100); 3173 3174 ca8210_reset_send(priv->spi, 1); 3175 3176 ret = tdme_chipinit(priv->spi); 3177 if (ret) { 3178 dev_crit(&spi_device->dev, "tdme_chipinit failed\n"); 3179 goto error; 3180 } 3181 3182 if (pdata->extclockenable) { 3183 ret = ca8210_config_extern_clk(pdata, priv->spi, 1); 3184 if (ret) { 3185 dev_crit( 3186 &spi_device->dev, 3187 "ca8210_config_extern_clk failed\n" 3188 ); 3189 goto error; 3190 } 3191 ret = ca8210_register_ext_clock(priv->spi); 3192 if (ret) { 3193 dev_crit( 3194 &spi_device->dev, 3195 "ca8210_register_ext_clock failed\n" 3196 ); 3197 goto error; 3198 } 3199 } 3200 3201 ret = ieee802154_register_hw(hw); 3202 if (ret) { 3203 dev_crit(&spi_device->dev, "ieee802154_register_hw failed\n"); 3204 goto error; 3205 } 3206 priv->hw_registered = true; 3207 3208 return 0; 3209 error: 3210 msleep(100); /* wait for pending spi transfers to complete */ 3211 ca8210_remove(spi_device); 3212 return link_to_linux_err(ret); 3213 } 3214 3215 static const struct of_device_id ca8210_of_ids[] = { 3216 {.compatible = "cascoda,ca8210", }, 3217 {}, 3218 }; 3219 MODULE_DEVICE_TABLE(of, ca8210_of_ids); 3220 3221 static struct spi_driver ca8210_spi_driver = { 3222 .driver = { 3223 .name = DRIVER_NAME, 3224 .owner = THIS_MODULE, 3225 .of_match_table = of_match_ptr(ca8210_of_ids), 3226 }, 3227 .probe = ca8210_probe, 3228 .remove = ca8210_remove 3229 }; 3230 3231 module_spi_driver(ca8210_spi_driver); 3232 3233 MODULE_AUTHOR("Harry Morris <h.morris@cascoda.com>"); 3234 MODULE_DESCRIPTION("CA-8210 SoftMAC driver"); 3235 MODULE_LICENSE("Dual BSD/GPL"); 3236 MODULE_VERSION("1.0"); 3237