]> git.ipfire.org Git - people/arne_f/kernel.git/blob - drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
projects / people / arne_f / kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
brcmfmac: handle SDIO card removal
[people/arne_f/kernel.git] / drivers / net / wireless / brcm80211 / brcmfmac / dhd_sdio.c
1 /*
2 * Copyright (c) 2010 Broadcom Corporation
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <linux/types.h>
18 #include <linux/kernel.h>
19 #include <linux/kthread.h>
20 #include <linux/printk.h>
21 #include <linux/pci_ids.h>
22 #include <linux/netdevice.h>
23 #include <linux/interrupt.h>
24 #include <linux/sched.h>
25 #include <linux/mmc/sdio.h>
26 #include <linux/mmc/sdio_func.h>
27 #include <linux/mmc/card.h>
28 #include <linux/semaphore.h>
29 #include <linux/firmware.h>
30 #include <linux/module.h>
31 #include <linux/bcma/bcma.h>
32 #include <linux/debugfs.h>
33 #include <linux/vmalloc.h>
34 #include <linux/platform_data/brcmfmac-sdio.h>
35 #include <linux/moduleparam.h>
36 #include <asm/unaligned.h>
37 #include <defs.h>
38 #include <brcmu_wifi.h>
39 #include <brcmu_utils.h>
40 #include <brcm_hw_ids.h>
41 #include <soc.h>
42 #include "sdio_host.h"
43 #include "sdio_chip.h"
44 #include "nvram.h"
45
46 #define DCMD_RESP_TIMEOUT 2000 /* In milli second */
47
48 #ifdef DEBUG
49
50 #define BRCMF_TRAP_INFO_SIZE 80
51
52 #define CBUF_LEN (128)
53
54 /* Device console log buffer state */
55 #define CONSOLE_BUFFER_MAX 2024
56
57 struct rte_log_le {
58 __le32 buf; /* Can't be pointer on (64-bit) hosts */
59 __le32 buf_size;
60 __le32 idx;
61 char *_buf_compat; /* Redundant pointer for backward compat. */
62 };
63
64 struct rte_console {
65 /* Virtual UART
66 * When there is no UART (e.g. Quickturn),
67 * the host should write a complete
68 * input line directly into cbuf and then write
69 * the length into vcons_in.
70 * This may also be used when there is a real UART
71 * (at risk of conflicting with
72 * the real UART). vcons_out is currently unused.
73 */
74 uint vcons_in;
75 uint vcons_out;
76
77 /* Output (logging) buffer
78 * Console output is written to a ring buffer log_buf at index log_idx.
79 * The host may read the output when it sees log_idx advance.
80 * Output will be lost if the output wraps around faster than the host
81 * polls.
82 */
83 struct rte_log_le log_le;
84
85 /* Console input line buffer
86 * Characters are read one at a time into cbuf
87 * until <CR> is received, then
88 * the buffer is processed as a command line.
89 * Also used for virtual UART.
90 */
91 uint cbuf_idx;
92 char cbuf[CBUF_LEN];
93 };
94
95 #endif /* DEBUG */
96 #include <chipcommon.h>
97
98 #include "dhd_bus.h"
99 #include "dhd_dbg.h"
100 #include "tracepoint.h"
101
102 #define TXQLEN 2048 /* bulk tx queue length */
103 #define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */
104 #define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */
105 #define PRIOMASK 7
106
107 #define TXRETRIES 2 /* # of retries for tx frames */
108
109 #define BRCMF_RXBOUND 50 /* Default for max rx frames in
110 one scheduling */
111
112 #define BRCMF_TXBOUND 20 /* Default for max tx frames in
113 one scheduling */
114
115 #define BRCMF_DEFAULT_TXGLOM_SIZE 32 /* max tx frames in glom chain */
116
117 #define BRCMF_TXMINMAX 1 /* Max tx frames if rx still pending */
118
119 #define MEMBLOCK 2048 /* Block size used for downloading
120 of dongle image */
121 #define MAX_DATA_BUF (32 * 1024) /* Must be large enough to hold
122 biggest possible glom */
123
124 #define BRCMF_FIRSTREAD (1 << 6)
125
126
127 /* SBSDIO_DEVICE_CTL */
128
129 /* 1: device will assert busy signal when receiving CMD53 */
130 #define SBSDIO_DEVCTL_SETBUSY 0x01
131 /* 1: assertion of sdio interrupt is synchronous to the sdio clock */
132 #define SBSDIO_DEVCTL_SPI_INTR_SYNC 0x02
133 /* 1: mask all interrupts to host except the chipActive (rev 8) */
134 #define SBSDIO_DEVCTL_CA_INT_ONLY 0x04
135 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
136 * sdio bus power cycle to clear (rev 9) */
137 #define SBSDIO_DEVCTL_PADS_ISO 0x08
138 /* Force SD->SB reset mapping (rev 11) */
139 #define SBSDIO_DEVCTL_SB_RST_CTL 0x30
140 /* Determined by CoreControl bit */
141 #define SBSDIO_DEVCTL_RST_CORECTL 0x00
142 /* Force backplane reset */
143 #define SBSDIO_DEVCTL_RST_BPRESET 0x10
144 /* Force no backplane reset */
145 #define SBSDIO_DEVCTL_RST_NOBPRESET 0x20
146
147 /* direct(mapped) cis space */
148
149 /* MAPPED common CIS address */
150 #define SBSDIO_CIS_BASE_COMMON 0x1000
151 /* maximum bytes in one CIS */
152 #define SBSDIO_CIS_SIZE_LIMIT 0x200
153 /* cis offset addr is < 17 bits */
154 #define SBSDIO_CIS_OFT_ADDR_MASK 0x1FFFF
155
156 /* manfid tuple length, include tuple, link bytes */
157 #define SBSDIO_CIS_MANFID_TUPLE_LEN 6
158
159 /* intstatus */
160 #define I_SMB_SW0 (1 << 0) /* To SB Mail S/W interrupt 0 */
161 #define I_SMB_SW1 (1 << 1) /* To SB Mail S/W interrupt 1 */
162 #define I_SMB_SW2 (1 << 2) /* To SB Mail S/W interrupt 2 */
163 #define I_SMB_SW3 (1 << 3) /* To SB Mail S/W interrupt 3 */
164 #define I_SMB_SW_MASK 0x0000000f /* To SB Mail S/W interrupts mask */
165 #define I_SMB_SW_SHIFT 0 /* To SB Mail S/W interrupts shift */
166 #define I_HMB_SW0 (1 << 4) /* To Host Mail S/W interrupt 0 */
167 #define I_HMB_SW1 (1 << 5) /* To Host Mail S/W interrupt 1 */
168 #define I_HMB_SW2 (1 << 6) /* To Host Mail S/W interrupt 2 */
169 #define I_HMB_SW3 (1 << 7) /* To Host Mail S/W interrupt 3 */
170 #define I_HMB_SW_MASK 0x000000f0 /* To Host Mail S/W interrupts mask */
171 #define I_HMB_SW_SHIFT 4 /* To Host Mail S/W interrupts shift */
172 #define I_WR_OOSYNC (1 << 8) /* Write Frame Out Of Sync */
173 #define I_RD_OOSYNC (1 << 9) /* Read Frame Out Of Sync */
174 #define I_PC (1 << 10) /* descriptor error */
175 #define I_PD (1 << 11) /* data error */
176 #define I_DE (1 << 12) /* Descriptor protocol Error */
177 #define I_RU (1 << 13) /* Receive descriptor Underflow */
178 #define I_RO (1 << 14) /* Receive fifo Overflow */
179 #define I_XU (1 << 15) /* Transmit fifo Underflow */
180 #define I_RI (1 << 16) /* Receive Interrupt */
181 #define I_BUSPWR (1 << 17) /* SDIO Bus Power Change (rev 9) */
182 #define I_XMTDATA_AVAIL (1 << 23) /* bits in fifo */
183 #define I_XI (1 << 24) /* Transmit Interrupt */
184 #define I_RF_TERM (1 << 25) /* Read Frame Terminate */
185 #define I_WF_TERM (1 << 26) /* Write Frame Terminate */
186 #define I_PCMCIA_XU (1 << 27) /* PCMCIA Transmit FIFO Underflow */
187 #define I_SBINT (1 << 28) /* sbintstatus Interrupt */
188 #define I_CHIPACTIVE (1 << 29) /* chip from doze to active state */
189 #define I_SRESET (1 << 30) /* CCCR RES interrupt */
190 #define I_IOE2 (1U << 31) /* CCCR IOE2 Bit Changed */
191 #define I_ERRORS (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
192 #define I_DMA (I_RI | I_XI | I_ERRORS)
193
194 /* corecontrol */
195 #define CC_CISRDY (1 << 0) /* CIS Ready */
196 #define CC_BPRESEN (1 << 1) /* CCCR RES signal */
197 #define CC_F2RDY (1 << 2) /* set CCCR IOR2 bit */
198 #define CC_CLRPADSISO (1 << 3) /* clear SDIO pads isolation */
199 #define CC_XMTDATAAVAIL_MODE (1 << 4)
200 #define CC_XMTDATAAVAIL_CTRL (1 << 5)
201
202 /* SDA_FRAMECTRL */
203 #define SFC_RF_TERM (1 << 0) /* Read Frame Terminate */
204 #define SFC_WF_TERM (1 << 1) /* Write Frame Terminate */
205 #define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */
206 #define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */
207
208 /*
209 * Software allocation of To SB Mailbox resources
210 */
211
212 /* tosbmailbox bits corresponding to intstatus bits */
213 #define SMB_NAK (1 << 0) /* Frame NAK */
214 #define SMB_INT_ACK (1 << 1) /* Host Interrupt ACK */
215 #define SMB_USE_OOB (1 << 2) /* Use OOB Wakeup */
216 #define SMB_DEV_INT (1 << 3) /* Miscellaneous Interrupt */
217
218 /* tosbmailboxdata */
219 #define SMB_DATA_VERSION_SHIFT 16 /* host protocol version */
220
221 /*
222 * Software allocation of To Host Mailbox resources
223 */
224
225 /* intstatus bits */
226 #define I_HMB_FC_STATE I_HMB_SW0 /* Flow Control State */
227 #define I_HMB_FC_CHANGE I_HMB_SW1 /* Flow Control State Changed */
228 #define I_HMB_FRAME_IND I_HMB_SW2 /* Frame Indication */
229 #define I_HMB_HOST_INT I_HMB_SW3 /* Miscellaneous Interrupt */
230
231 /* tohostmailboxdata */
232 #define HMB_DATA_NAKHANDLED 1 /* retransmit NAK'd frame */
233 #define HMB_DATA_DEVREADY 2 /* talk to host after enable */
234 #define HMB_DATA_FC 4 /* per prio flowcontrol update flag */
235 #define HMB_DATA_FWREADY 8 /* fw ready for protocol activity */
236
237 #define HMB_DATA_FCDATA_MASK 0xff000000
238 #define HMB_DATA_FCDATA_SHIFT 24
239
240 #define HMB_DATA_VERSION_MASK 0x00ff0000
241 #define HMB_DATA_VERSION_SHIFT 16
242
243 /*
244 * Software-defined protocol header
245 */
246
247 /* Current protocol version */
248 #define SDPCM_PROT_VERSION 4
249
250 /*
251 * Shared structure between dongle and the host.
252 * The structure contains pointers to trap or assert information.
253 */
254 #define SDPCM_SHARED_VERSION 0x0003
255 #define SDPCM_SHARED_VERSION_MASK 0x00FF
256 #define SDPCM_SHARED_ASSERT_BUILT 0x0100
257 #define SDPCM_SHARED_ASSERT 0x0200
258 #define SDPCM_SHARED_TRAP 0x0400
259
260 /* Space for header read, limit for data packets */
261 #define MAX_HDR_READ (1 << 6)
262 #define MAX_RX_DATASZ 2048
263
264 /* Bump up limit on waiting for HT to account for first startup;
265 * if the image is doing a CRC calculation before programming the PMU
266 * for HT availability, it could take a couple hundred ms more, so
267 * max out at a 1 second (1000000us).
268 */
269 #undef PMU_MAX_TRANSITION_DLY
270 #define PMU_MAX_TRANSITION_DLY 1000000
271
272 /* Value for ChipClockCSR during initial setup */
273 #define BRCMF_INIT_CLKCTL1 (SBSDIO_FORCE_HW_CLKREQ_OFF | \
274 SBSDIO_ALP_AVAIL_REQ)
275
276 /* Flags for SDH calls */
277 #define F2SYNC (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
278
279 #define BRCMF_IDLE_IMMEDIATE (-1) /* Enter idle immediately */
280 #define BRCMF_IDLE_ACTIVE 0 /* Do not request any SD clock change
281 * when idle
282 */
283 #define BRCMF_IDLE_INTERVAL 1
284
285 #define KSO_WAIT_US 50
286 #define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US)
287
288 /*
289 * Conversion of 802.1D priority to precedence level
290 */
291 static uint prio2prec(u32 prio)
292 {
293 return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
294 (prio^2) : prio;
295 }
296
297 #ifdef DEBUG
298 /* Device console log buffer state */
299 struct brcmf_console {
300 uint count; /* Poll interval msec counter */
301 uint log_addr; /* Log struct address (fixed) */
302 struct rte_log_le log_le; /* Log struct (host copy) */
303 uint bufsize; /* Size of log buffer */
304 u8 *buf; /* Log buffer (host copy) */
305 uint last; /* Last buffer read index */
306 };
307
308 struct brcmf_trap_info {
309 __le32 type;
310 __le32 epc;
311 __le32 cpsr;
312 __le32 spsr;
313 __le32 r0; /* a1 */
314 __le32 r1; /* a2 */
315 __le32 r2; /* a3 */
316 __le32 r3; /* a4 */
317 __le32 r4; /* v1 */
318 __le32 r5; /* v2 */
319 __le32 r6; /* v3 */
320 __le32 r7; /* v4 */
321 __le32 r8; /* v5 */
322 __le32 r9; /* sb/v6 */
323 __le32 r10; /* sl/v7 */
324 __le32 r11; /* fp/v8 */
325 __le32 r12; /* ip */
326 __le32 r13; /* sp */
327 __le32 r14; /* lr */
328 __le32 pc; /* r15 */
329 };
330 #endif /* DEBUG */
331
332 struct sdpcm_shared {
333 u32 flags;
334 u32 trap_addr;
335 u32 assert_exp_addr;
336 u32 assert_file_addr;
337 u32 assert_line;
338 u32 console_addr; /* Address of struct rte_console */
339 u32 msgtrace_addr;
340 u8 tag[32];
341 u32 brpt_addr;
342 };
343
344 struct sdpcm_shared_le {
345 __le32 flags;
346 __le32 trap_addr;
347 __le32 assert_exp_addr;
348 __le32 assert_file_addr;
349 __le32 assert_line;
350 __le32 console_addr; /* Address of struct rte_console */
351 __le32 msgtrace_addr;
352 u8 tag[32];
353 __le32 brpt_addr;
354 };
355
356 /* dongle SDIO bus specific header info */
357 struct brcmf_sdio_hdrinfo {
358 u8 seq_num;
359 u8 channel;
360 u16 len;
361 u16 len_left;
362 u16 len_nxtfrm;
363 u8 dat_offset;
364 bool lastfrm;
365 u16 tail_pad;
366 };
367
368 /* misc chip info needed by some of the routines */
369 /* Private data for SDIO bus interaction */
370 struct brcmf_sdio {
371 struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
372 struct brcmf_chip *ci; /* Chip info struct */
373
374 u32 ramsize; /* Size of RAM in SOCRAM (bytes) */
375
376 u32 hostintmask; /* Copy of Host Interrupt Mask */
377 atomic_t intstatus; /* Intstatus bits (events) pending */
378 atomic_t fcstate; /* State of dongle flow-control */
379
380 uint blocksize; /* Block size of SDIO transfers */
381 uint roundup; /* Max roundup limit */
382
383 struct pktq txq; /* Queue length used for flow-control */
384 u8 flowcontrol; /* per prio flow control bitmask */
385 u8 tx_seq; /* Transmit sequence number (next) */
386 u8 tx_max; /* Maximum transmit sequence allowed */
387
388 u8 *hdrbuf; /* buffer for handling rx frame */
389 u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */
390 u8 rx_seq; /* Receive sequence number (expected) */
391 struct brcmf_sdio_hdrinfo cur_read;
392 /* info of current read frame */
393 bool rxskip; /* Skip receive (awaiting NAK ACK) */
394 bool rxpending; /* Data frame pending in dongle */
395
396 uint rxbound; /* Rx frames to read before resched */
397 uint txbound; /* Tx frames to send before resched */
398 uint txminmax;
399
400 struct sk_buff *glomd; /* Packet containing glomming descriptor */
401 struct sk_buff_head glom; /* Packet list for glommed superframe */
402 uint glomerr; /* Glom packet read errors */
403
404 u8 *rxbuf; /* Buffer for receiving control packets */
405 uint rxblen; /* Allocated length of rxbuf */
406 u8 *rxctl; /* Aligned pointer into rxbuf */
407 u8 *rxctl_orig; /* pointer for freeing rxctl */
408 uint rxlen; /* Length of valid data in buffer */
409 spinlock_t rxctl_lock; /* protection lock for ctrl frame resources */
410
411 u8 sdpcm_ver; /* Bus protocol reported by dongle */
412
413 bool intr; /* Use interrupts */
414 bool poll; /* Use polling */
415 atomic_t ipend; /* Device interrupt is pending */
416 uint spurious; /* Count of spurious interrupts */
417 uint pollrate; /* Ticks between device polls */
418 uint polltick; /* Tick counter */
419
420 #ifdef DEBUG
421 uint console_interval;
422 struct brcmf_console console; /* Console output polling support */
423 uint console_addr; /* Console address from shared struct */
424 #endif /* DEBUG */
425
426 uint clkstate; /* State of sd and backplane clock(s) */
427 bool activity; /* Activity flag for clock down */
428 s32 idletime; /* Control for activity timeout */
429 s32 idlecount; /* Activity timeout counter */
430 s32 idleclock; /* How to set bus driver when idle */
431 bool rxflow_mode; /* Rx flow control mode */
432 bool rxflow; /* Is rx flow control on */
433 bool alp_only; /* Don't use HT clock (ALP only) */
434
435 u8 *ctrl_frame_buf;
436 u32 ctrl_frame_len;
437 bool ctrl_frame_stat;
438
439 spinlock_t txqlock;
440 wait_queue_head_t ctrl_wait;
441 wait_queue_head_t dcmd_resp_wait;
442
443 struct timer_list timer;
444 struct completion watchdog_wait;
445 struct task_struct *watchdog_tsk;
446 bool wd_timer_valid;
447 uint save_ms;
448
449 struct workqueue_struct *brcmf_wq;
450 struct work_struct datawork;
451 atomic_t dpc_tskcnt;
452
453 bool txoff; /* Transmit flow-controlled */
454 struct brcmf_sdio_count sdcnt;
455 bool sr_enabled; /* SaveRestore enabled */
456 bool sleeping; /* SDIO bus sleeping */
457
458 u8 tx_hdrlen; /* sdio bus header length for tx packet */
459 bool txglom; /* host tx glomming enable flag */
460 struct sk_buff *txglom_sgpad; /* scatter-gather padding buffer */
461 u16 head_align; /* buffer pointer alignment */
462 u16 sgentry_align; /* scatter-gather buffer alignment */
463 };
464
465 /* clkstate */
466 #define CLK_NONE 0
467 #define CLK_SDONLY 1
468 #define CLK_PENDING 2
469 #define CLK_AVAIL 3
470
471 #ifdef DEBUG
472 static int qcount[NUMPRIO];
473 #endif /* DEBUG */
474
475 #define DEFAULT_SDIO_DRIVE_STRENGTH 6 /* in milliamps */
476
477 #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
478
479 /* Retry count for register access failures */
480 static const uint retry_limit = 2;
481
482 /* Limit on rounding up frames */
483 static const uint max_roundup = 512;
484
485 #define ALIGNMENT 4
486
487 static int brcmf_sdio_txglomsz = BRCMF_DEFAULT_TXGLOM_SIZE;
488 module_param_named(txglomsz, brcmf_sdio_txglomsz, int, 0);
489 MODULE_PARM_DESC(txglomsz, "maximum tx packet chain size [SDIO]");
490
491 enum brcmf_sdio_frmtype {
492 BRCMF_SDIO_FT_NORMAL,
493 BRCMF_SDIO_FT_SUPER,
494 BRCMF_SDIO_FT_SUB,
495 };
496
497 #define BCM43143_FIRMWARE_NAME "brcm/brcmfmac43143-sdio.bin"
498 #define BCM43143_NVRAM_NAME "brcm/brcmfmac43143-sdio.txt"
499 #define BCM43241B0_FIRMWARE_NAME "brcm/brcmfmac43241b0-sdio.bin"
500 #define BCM43241B0_NVRAM_NAME "brcm/brcmfmac43241b0-sdio.txt"
501 #define BCM43241B4_FIRMWARE_NAME "brcm/brcmfmac43241b4-sdio.bin"
502 #define BCM43241B4_NVRAM_NAME "brcm/brcmfmac43241b4-sdio.txt"
503 #define BCM4329_FIRMWARE_NAME "brcm/brcmfmac4329-sdio.bin"
504 #define BCM4329_NVRAM_NAME "brcm/brcmfmac4329-sdio.txt"
505 #define BCM4330_FIRMWARE_NAME "brcm/brcmfmac4330-sdio.bin"
506 #define BCM4330_NVRAM_NAME "brcm/brcmfmac4330-sdio.txt"
507 #define BCM4334_FIRMWARE_NAME "brcm/brcmfmac4334-sdio.bin"
508 #define BCM4334_NVRAM_NAME "brcm/brcmfmac4334-sdio.txt"
509 #define BCM4335_FIRMWARE_NAME "brcm/brcmfmac4335-sdio.bin"
510 #define BCM4335_NVRAM_NAME "brcm/brcmfmac4335-sdio.txt"
511 #define BCM43362_FIRMWARE_NAME "brcm/brcmfmac43362-sdio.bin"
512 #define BCM43362_NVRAM_NAME "brcm/brcmfmac43362-sdio.txt"
513 #define BCM4339_FIRMWARE_NAME "brcm/brcmfmac4339-sdio.bin"
514 #define BCM4339_NVRAM_NAME "brcm/brcmfmac4339-sdio.txt"
515
516 MODULE_FIRMWARE(BCM43143_FIRMWARE_NAME);
517 MODULE_FIRMWARE(BCM43143_NVRAM_NAME);
518 MODULE_FIRMWARE(BCM43241B0_FIRMWARE_NAME);
519 MODULE_FIRMWARE(BCM43241B0_NVRAM_NAME);
520 MODULE_FIRMWARE(BCM43241B4_FIRMWARE_NAME);
521 MODULE_FIRMWARE(BCM43241B4_NVRAM_NAME);
522 MODULE_FIRMWARE(BCM4329_FIRMWARE_NAME);
523 MODULE_FIRMWARE(BCM4329_NVRAM_NAME);
524 MODULE_FIRMWARE(BCM4330_FIRMWARE_NAME);
525 MODULE_FIRMWARE(BCM4330_NVRAM_NAME);
526 MODULE_FIRMWARE(BCM4334_FIRMWARE_NAME);
527 MODULE_FIRMWARE(BCM4334_NVRAM_NAME);
528 MODULE_FIRMWARE(BCM4335_FIRMWARE_NAME);
529 MODULE_FIRMWARE(BCM4335_NVRAM_NAME);
530 MODULE_FIRMWARE(BCM43362_FIRMWARE_NAME);
531 MODULE_FIRMWARE(BCM43362_NVRAM_NAME);
532 MODULE_FIRMWARE(BCM4339_FIRMWARE_NAME);
533 MODULE_FIRMWARE(BCM4339_NVRAM_NAME);
534
535 struct brcmf_firmware_names {
536 u32 chipid;
537 u32 revmsk;
538 const char *bin;
539 const char *nv;
540 };
541
542 enum brcmf_firmware_type {
543 BRCMF_FIRMWARE_BIN,
544 BRCMF_FIRMWARE_NVRAM
545 };
546
547 #define BRCMF_FIRMWARE_NVRAM(name) \
548 name ## _FIRMWARE_NAME, name ## _NVRAM_NAME
549
550 static const struct brcmf_firmware_names brcmf_fwname_data[] = {
551 { BCM43143_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM43143) },
552 { BCM43241_CHIP_ID, 0x0000001F, BRCMF_FIRMWARE_NVRAM(BCM43241B0) },
553 { BCM43241_CHIP_ID, 0xFFFFFFE0, BRCMF_FIRMWARE_NVRAM(BCM43241B4) },
554 { BCM4329_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4329) },
555 { BCM4330_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4330) },
556 { BCM4334_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4334) },
557 { BCM4335_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4335) },
558 { BCM43362_CHIP_ID, 0xFFFFFFFE, BRCMF_FIRMWARE_NVRAM(BCM43362) },
559 { BCM4339_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4339) }
560 };
561
562
563 static const struct firmware *brcmf_sdio_get_fw(struct brcmf_sdio *bus,
564 enum brcmf_firmware_type type)
565 {
566 const struct firmware *fw;
567 const char *name;
568 int err, i;
569
570 for (i = 0; i < ARRAY_SIZE(brcmf_fwname_data); i++) {
571 if (brcmf_fwname_data[i].chipid == bus->ci->chip &&
572 brcmf_fwname_data[i].revmsk & BIT(bus->ci->chiprev)) {
573 switch (type) {
574 case BRCMF_FIRMWARE_BIN:
575 name = brcmf_fwname_data[i].bin;
576 break;
577 case BRCMF_FIRMWARE_NVRAM:
578 name = brcmf_fwname_data[i].nv;
579 break;
580 default:
581 brcmf_err("invalid firmware type (%d)\n", type);
582 return NULL;
583 }
584 goto found;
585 }
586 }
587 brcmf_err("Unknown chipid %d [%d]\n",
588 bus->ci->chip, bus->ci->chiprev);
589 return NULL;
590
591 found:
592 err = request_firmware(&fw, name, &bus->sdiodev->func[2]->dev);
593 if ((err) || (!fw)) {
594 brcmf_err("fail to request firmware %s (%d)\n", name, err);
595 return NULL;
596 }
597
598 return fw;
599 }
600
601 static void pkt_align(struct sk_buff *p, int len, int align)
602 {
603 uint datalign;
604 datalign = (unsigned long)(p->data);
605 datalign = roundup(datalign, (align)) - datalign;
606 if (datalign)
607 skb_pull(p, datalign);
608 __skb_trim(p, len);
609 }
610
611 /* To check if there's window offered */
612 static bool data_ok(struct brcmf_sdio *bus)
613 {
614 return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
615 ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
616 }
617
618 /*
619 * Reads a register in the SDIO hardware block. This block occupies a series of
620 * adresses on the 32 bit backplane bus.
621 */
622 static int
623 r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset)
624 {
625 u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
626 int ret;
627
628 *regvar = brcmf_sdiod_regrl(bus->sdiodev,
629 bus->ci->c_inf[idx].base + offset, &ret);
630
631 return ret;
632 }
633
634 static int
635 w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
636 {
637 u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
638 int ret;
639
640 brcmf_sdiod_regwl(bus->sdiodev,
641 bus->ci->c_inf[idx].base + reg_offset,
642 regval, &ret);
643
644 return ret;
645 }
646
647 static int
648 brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on)
649 {
650 u8 wr_val = 0, rd_val, cmp_val, bmask;
651 int err = 0;
652 int try_cnt = 0;
653
654 brcmf_dbg(TRACE, "Enter\n");
655
656 wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
657 /* 1st KSO write goes to AOS wake up core if device is asleep */
658 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
659 wr_val, &err);
660 if (err) {
661 brcmf_err("SDIO_AOS KSO write error: %d\n", err);
662 return err;
663 }
664
665 if (on) {
666 /* device WAKEUP through KSO:
667 * write bit 0 & read back until
668 * both bits 0 (kso bit) & 1 (dev on status) are set
669 */
670 cmp_val = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK |
671 SBSDIO_FUNC1_SLEEPCSR_DEVON_MASK;
672 bmask = cmp_val;
673 usleep_range(2000, 3000);
674 } else {
675 /* Put device to sleep, turn off KSO */
676 cmp_val = 0;
677 /* only check for bit0, bit1(dev on status) may not
678 * get cleared right away
679 */
680 bmask = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK;
681 }
682
683 do {
684 /* reliable KSO bit set/clr:
685 * the sdiod sleep write access is synced to PMU 32khz clk
686 * just one write attempt may fail,
687 * read it back until it matches written value
688 */
689 rd_val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
690 &err);
691 if (((rd_val & bmask) == cmp_val) && !err)
692 break;
693 brcmf_dbg(SDIO, "KSO wr/rd retry:%d (max: %d) ERR:%x\n",
694 try_cnt, MAX_KSO_ATTEMPTS, err);
695 udelay(KSO_WAIT_US);
696 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
697 wr_val, &err);
698 } while (try_cnt++ < MAX_KSO_ATTEMPTS);
699
700 return err;
701 }
702
703 #define PKT_AVAILABLE() (intstatus & I_HMB_FRAME_IND)
704
705 #define HOSTINTMASK (I_HMB_SW_MASK | I_CHIPACTIVE)
706
707 /* Turn backplane clock on or off */
708 static int brcmf_sdio_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
709 {
710 int err;
711 u8 clkctl, clkreq, devctl;
712 unsigned long timeout;
713
714 brcmf_dbg(SDIO, "Enter\n");
715
716 clkctl = 0;
717
718 if (bus->sr_enabled) {
719 bus->clkstate = (on ? CLK_AVAIL : CLK_SDONLY);
720 return 0;
721 }
722
723 if (on) {
724 /* Request HT Avail */
725 clkreq =
726 bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
727
728 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
729 clkreq, &err);
730 if (err) {
731 brcmf_err("HT Avail request error: %d\n", err);
732 return -EBADE;
733 }
734
735 /* Check current status */
736 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
737 SBSDIO_FUNC1_CHIPCLKCSR, &err);
738 if (err) {
739 brcmf_err("HT Avail read error: %d\n", err);
740 return -EBADE;
741 }
742
743 /* Go to pending and await interrupt if appropriate */
744 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
745 /* Allow only clock-available interrupt */
746 devctl = brcmf_sdiod_regrb(bus->sdiodev,
747 SBSDIO_DEVICE_CTL, &err);
748 if (err) {
749 brcmf_err("Devctl error setting CA: %d\n",
750 err);
751 return -EBADE;
752 }
753
754 devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
755 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
756 devctl, &err);
757 brcmf_dbg(SDIO, "CLKCTL: set PENDING\n");
758 bus->clkstate = CLK_PENDING;
759
760 return 0;
761 } else if (bus->clkstate == CLK_PENDING) {
762 /* Cancel CA-only interrupt filter */
763 devctl = brcmf_sdiod_regrb(bus->sdiodev,
764 SBSDIO_DEVICE_CTL, &err);
765 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
766 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
767 devctl, &err);
768 }
769
770 /* Otherwise, wait here (polling) for HT Avail */
771 timeout = jiffies +
772 msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
773 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
774 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
775 SBSDIO_FUNC1_CHIPCLKCSR,
776 &err);
777 if (time_after(jiffies, timeout))
778 break;
779 else
780 usleep_range(5000, 10000);
781 }
782 if (err) {
783 brcmf_err("HT Avail request error: %d\n", err);
784 return -EBADE;
785 }
786 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
787 brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n",
788 PMU_MAX_TRANSITION_DLY, clkctl);
789 return -EBADE;
790 }
791
792 /* Mark clock available */
793 bus->clkstate = CLK_AVAIL;
794 brcmf_dbg(SDIO, "CLKCTL: turned ON\n");
795
796 #if defined(DEBUG)
797 if (!bus->alp_only) {
798 if (SBSDIO_ALPONLY(clkctl))
799 brcmf_err("HT Clock should be on\n");
800 }
801 #endif /* defined (DEBUG) */
802
803 bus->activity = true;
804 } else {
805 clkreq = 0;
806
807 if (bus->clkstate == CLK_PENDING) {
808 /* Cancel CA-only interrupt filter */
809 devctl = brcmf_sdiod_regrb(bus->sdiodev,
810 SBSDIO_DEVICE_CTL, &err);
811 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
812 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
813 devctl, &err);
814 }
815
816 bus->clkstate = CLK_SDONLY;
817 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
818 clkreq, &err);
819 brcmf_dbg(SDIO, "CLKCTL: turned OFF\n");
820 if (err) {
821 brcmf_err("Failed access turning clock off: %d\n",
822 err);
823 return -EBADE;
824 }
825 }
826 return 0;
827 }
828
829 /* Change idle/active SD state */
830 static int brcmf_sdio_sdclk(struct brcmf_sdio *bus, bool on)
831 {
832 brcmf_dbg(SDIO, "Enter\n");
833
834 if (on)
835 bus->clkstate = CLK_SDONLY;
836 else
837 bus->clkstate = CLK_NONE;
838
839 return 0;
840 }
841
842 /* Transition SD and backplane clock readiness */
843 static int brcmf_sdio_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
844 {
845 #ifdef DEBUG
846 uint oldstate = bus->clkstate;
847 #endif /* DEBUG */
848
849 brcmf_dbg(SDIO, "Enter\n");
850
851 /* Early exit if we're already there */
852 if (bus->clkstate == target) {
853 if (target == CLK_AVAIL) {
854 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
855 bus->activity = true;
856 }
857 return 0;
858 }
859
860 switch (target) {
861 case CLK_AVAIL:
862 /* Make sure SD clock is available */
863 if (bus->clkstate == CLK_NONE)
864 brcmf_sdio_sdclk(bus, true);
865 /* Now request HT Avail on the backplane */
866 brcmf_sdio_htclk(bus, true, pendok);
867 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
868 bus->activity = true;
869 break;
870
871 case CLK_SDONLY:
872 /* Remove HT request, or bring up SD clock */
873 if (bus->clkstate == CLK_NONE)
874 brcmf_sdio_sdclk(bus, true);
875 else if (bus->clkstate == CLK_AVAIL)
876 brcmf_sdio_htclk(bus, false, false);
877 else
878 brcmf_err("request for %d -> %d\n",
879 bus->clkstate, target);
880 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
881 break;
882
883 case CLK_NONE:
884 /* Make sure to remove HT request */
885 if (bus->clkstate == CLK_AVAIL)
886 brcmf_sdio_htclk(bus, false, false);
887 /* Now remove the SD clock */
888 brcmf_sdio_sdclk(bus, false);
889 brcmf_sdio_wd_timer(bus, 0);
890 break;
891 }
892 #ifdef DEBUG
893 brcmf_dbg(SDIO, "%d -> %d\n", oldstate, bus->clkstate);
894 #endif /* DEBUG */
895
896 return 0;
897 }
898
899 static int
900 brcmf_sdio_bus_sleep(struct brcmf_sdio *bus, bool sleep, bool pendok)
901 {
902 int err = 0;
903 brcmf_dbg(TRACE, "Enter\n");
904 brcmf_dbg(SDIO, "request %s currently %s\n",
905 (sleep ? "SLEEP" : "WAKE"),
906 (bus->sleeping ? "SLEEP" : "WAKE"));
907
908 /* If SR is enabled control bus state with KSO */
909 if (bus->sr_enabled) {
910 /* Done if we're already in the requested state */
911 if (sleep == bus->sleeping)
912 goto end;
913
914 /* Going to sleep */
915 if (sleep) {
916 /* Don't sleep if something is pending */
917 if (atomic_read(&bus->intstatus) ||
918 atomic_read(&bus->ipend) > 0 ||
919 (!atomic_read(&bus->fcstate) &&
920 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
921 data_ok(bus)))
922 return -EBUSY;
923 err = brcmf_sdio_kso_control(bus, false);
924 /* disable watchdog */
925 if (!err)
926 brcmf_sdio_wd_timer(bus, 0);
927 } else {
928 bus->idlecount = 0;
929 err = brcmf_sdio_kso_control(bus, true);
930 }
931 if (!err) {
932 /* Change state */
933 bus->sleeping = sleep;
934 brcmf_dbg(SDIO, "new state %s\n",
935 (sleep ? "SLEEP" : "WAKE"));
936 } else {
937 brcmf_err("error while changing bus sleep state %d\n",
938 err);
939 return err;
940 }
941 }
942
943 end:
944 /* control clocks */
945 if (sleep) {
946 if (!bus->sr_enabled)
947 brcmf_sdio_clkctl(bus, CLK_NONE, pendok);
948 } else {
949 brcmf_sdio_clkctl(bus, CLK_AVAIL, pendok);
950 }
951
952 return err;
953
954 }
955
956 static u32 brcmf_sdio_hostmail(struct brcmf_sdio *bus)
957 {
958 u32 intstatus = 0;
959 u32 hmb_data;
960 u8 fcbits;
961 int ret;
962
963 brcmf_dbg(SDIO, "Enter\n");
964
965 /* Read mailbox data and ack that we did so */
966 ret = r_sdreg32(bus, &hmb_data,
967 offsetof(struct sdpcmd_regs, tohostmailboxdata));
968
969 if (ret == 0)
970 w_sdreg32(bus, SMB_INT_ACK,
971 offsetof(struct sdpcmd_regs, tosbmailbox));
972 bus->sdcnt.f1regdata += 2;
973
974 /* Dongle recomposed rx frames, accept them again */
975 if (hmb_data & HMB_DATA_NAKHANDLED) {
976 brcmf_dbg(SDIO, "Dongle reports NAK handled, expect rtx of %d\n",
977 bus->rx_seq);
978 if (!bus->rxskip)
979 brcmf_err("unexpected NAKHANDLED!\n");
980
981 bus->rxskip = false;
982 intstatus |= I_HMB_FRAME_IND;
983 }
984
985 /*
986 * DEVREADY does not occur with gSPI.
987 */
988 if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
989 bus->sdpcm_ver =
990 (hmb_data & HMB_DATA_VERSION_MASK) >>
991 HMB_DATA_VERSION_SHIFT;
992 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
993 brcmf_err("Version mismatch, dongle reports %d, "
994 "expecting %d\n",
995 bus->sdpcm_ver, SDPCM_PROT_VERSION);
996 else
997 brcmf_dbg(SDIO, "Dongle ready, protocol version %d\n",
998 bus->sdpcm_ver);
999 }
1000
1001 /*
1002 * Flow Control has been moved into the RX headers and this out of band
1003 * method isn't used any more.
1004 * remaining backward compatible with older dongles.
1005 */
1006 if (hmb_data & HMB_DATA_FC) {
1007 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
1008 HMB_DATA_FCDATA_SHIFT;
1009
1010 if (fcbits & ~bus->flowcontrol)
1011 bus->sdcnt.fc_xoff++;
1012
1013 if (bus->flowcontrol & ~fcbits)
1014 bus->sdcnt.fc_xon++;
1015
1016 bus->sdcnt.fc_rcvd++;
1017 bus->flowcontrol = fcbits;
1018 }
1019
1020 /* Shouldn't be any others */
1021 if (hmb_data & ~(HMB_DATA_DEVREADY |
1022 HMB_DATA_NAKHANDLED |
1023 HMB_DATA_FC |
1024 HMB_DATA_FWREADY |
1025 HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
1026 brcmf_err("Unknown mailbox data content: 0x%02x\n",
1027 hmb_data);
1028
1029 return intstatus;
1030 }
1031
1032 static void brcmf_sdio_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
1033 {
1034 uint retries = 0;
1035 u16 lastrbc;
1036 u8 hi, lo;
1037 int err;
1038
1039 brcmf_err("%sterminate frame%s\n",
1040 abort ? "abort command, " : "",
1041 rtx ? ", send NAK" : "");
1042
1043 if (abort)
1044 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
1045
1046 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
1047 SFC_RF_TERM, &err);
1048 bus->sdcnt.f1regdata++;
1049
1050 /* Wait until the packet has been flushed (device/FIFO stable) */
1051 for (lastrbc = retries = 0xffff; retries > 0; retries--) {
1052 hi = brcmf_sdiod_regrb(bus->sdiodev,
1053 SBSDIO_FUNC1_RFRAMEBCHI, &err);
1054 lo = brcmf_sdiod_regrb(bus->sdiodev,
1055 SBSDIO_FUNC1_RFRAMEBCLO, &err);
1056 bus->sdcnt.f1regdata += 2;
1057
1058 if ((hi == 0) && (lo == 0))
1059 break;
1060
1061 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
1062 brcmf_err("count growing: last 0x%04x now 0x%04x\n",
1063 lastrbc, (hi << 8) + lo);
1064 }
1065 lastrbc = (hi << 8) + lo;
1066 }
1067
1068 if (!retries)
1069 brcmf_err("count never zeroed: last 0x%04x\n", lastrbc);
1070 else
1071 brcmf_dbg(SDIO, "flush took %d iterations\n", 0xffff - retries);
1072
1073 if (rtx) {
1074 bus->sdcnt.rxrtx++;
1075 err = w_sdreg32(bus, SMB_NAK,
1076 offsetof(struct sdpcmd_regs, tosbmailbox));
1077
1078 bus->sdcnt.f1regdata++;
1079 if (err == 0)
1080 bus->rxskip = true;
1081 }
1082
1083 /* Clear partial in any case */
1084 bus->cur_read.len = 0;
1085 }
1086
1087 /* return total length of buffer chain */
1088 static uint brcmf_sdio_glom_len(struct brcmf_sdio *bus)
1089 {
1090 struct sk_buff *p;
1091 uint total;
1092
1093 total = 0;
1094 skb_queue_walk(&bus->glom, p)
1095 total += p->len;
1096 return total;
1097 }
1098
1099 static void brcmf_sdio_free_glom(struct brcmf_sdio *bus)
1100 {
1101 struct sk_buff *cur, *next;
1102
1103 skb_queue_walk_safe(&bus->glom, cur, next) {
1104 skb_unlink(cur, &bus->glom);
1105 brcmu_pkt_buf_free_skb(cur);
1106 }
1107 }
1108
1109 /**
1110 * brcmfmac sdio bus specific header
1111 * This is the lowest layer header wrapped on the packets transmitted between
1112 * host and WiFi dongle which contains information needed for SDIO core and
1113 * firmware
1114 *
1115 * It consists of 3 parts: hardware header, hardware extension header and
1116 * software header
1117 * hardware header (frame tag) - 4 bytes
1118 * Byte 0~1: Frame length
1119 * Byte 2~3: Checksum, bit-wise inverse of frame length
1120 * hardware extension header - 8 bytes
1121 * Tx glom mode only, N/A for Rx or normal Tx
1122 * Byte 0~1: Packet length excluding hw frame tag
1123 * Byte 2: Reserved
1124 * Byte 3: Frame flags, bit 0: last frame indication
1125 * Byte 4~5: Reserved
1126 * Byte 6~7: Tail padding length
1127 * software header - 8 bytes
1128 * Byte 0: Rx/Tx sequence number
1129 * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
1130 * Byte 2: Length of next data frame, reserved for Tx
1131 * Byte 3: Data offset
1132 * Byte 4: Flow control bits, reserved for Tx
1133 * Byte 5: Maximum Sequence number allowed by firmware for Tx, N/A for Tx packet
1134 * Byte 6~7: Reserved
1135 */
1136 #define SDPCM_HWHDR_LEN 4
1137 #define SDPCM_HWEXT_LEN 8
1138 #define SDPCM_SWHDR_LEN 8
1139 #define SDPCM_HDRLEN (SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN)
1140 /* software header */
1141 #define SDPCM_SEQ_MASK 0x000000ff
1142 #define SDPCM_SEQ_WRAP 256
1143 #define SDPCM_CHANNEL_MASK 0x00000f00
1144 #define SDPCM_CHANNEL_SHIFT 8
1145 #define SDPCM_CONTROL_CHANNEL 0 /* Control */
1146 #define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication */
1147 #define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv */
1148 #define SDPCM_GLOM_CHANNEL 3 /* Coalesced packets */
1149 #define SDPCM_TEST_CHANNEL 15 /* Test/debug packets */
1150 #define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80)
1151 #define SDPCM_NEXTLEN_MASK 0x00ff0000
1152 #define SDPCM_NEXTLEN_SHIFT 16
1153 #define SDPCM_DOFFSET_MASK 0xff000000
1154 #define SDPCM_DOFFSET_SHIFT 24
1155 #define SDPCM_FCMASK_MASK 0x000000ff
1156 #define SDPCM_WINDOW_MASK 0x0000ff00
1157 #define SDPCM_WINDOW_SHIFT 8
1158
1159 static inline u8 brcmf_sdio_getdatoffset(u8 *swheader)
1160 {
1161 u32 hdrvalue;
1162 hdrvalue = *(u32 *)swheader;
1163 return (u8)((hdrvalue & SDPCM_DOFFSET_MASK) >> SDPCM_DOFFSET_SHIFT);
1164 }
1165
1166 static int brcmf_sdio_hdparse(struct brcmf_sdio *bus, u8 *header,
1167 struct brcmf_sdio_hdrinfo *rd,
1168 enum brcmf_sdio_frmtype type)
1169 {
1170 u16 len, checksum;
1171 u8 rx_seq, fc, tx_seq_max;
1172 u32 swheader;
1173
1174 trace_brcmf_sdpcm_hdr(SDPCM_RX, header);
1175
1176 /* hw header */
1177 len = get_unaligned_le16(header);
1178 checksum = get_unaligned_le16(header + sizeof(u16));
1179 /* All zero means no more to read */
1180 if (!(len | checksum)) {
1181 bus->rxpending = false;
1182 return -ENODATA;
1183 }
1184 if ((u16)(~(len ^ checksum))) {
1185 brcmf_err("HW header checksum error\n");
1186 bus->sdcnt.rx_badhdr++;
1187 brcmf_sdio_rxfail(bus, false, false);
1188 return -EIO;
1189 }
1190 if (len < SDPCM_HDRLEN) {
1191 brcmf_err("HW header length error\n");
1192 return -EPROTO;
1193 }
1194 if (type == BRCMF_SDIO_FT_SUPER &&
1195 (roundup(len, bus->blocksize) != rd->len)) {
1196 brcmf_err("HW superframe header length error\n");
1197 return -EPROTO;
1198 }
1199 if (type == BRCMF_SDIO_FT_SUB && len > rd->len) {
1200 brcmf_err("HW subframe header length error\n");
1201 return -EPROTO;
1202 }
1203 rd->len = len;
1204
1205 /* software header */
1206 header += SDPCM_HWHDR_LEN;
1207 swheader = le32_to_cpu(*(__le32 *)header);
1208 if (type == BRCMF_SDIO_FT_SUPER && SDPCM_GLOMDESC(header)) {
1209 brcmf_err("Glom descriptor found in superframe head\n");
1210 rd->len = 0;
1211 return -EINVAL;
1212 }
1213 rx_seq = (u8)(swheader & SDPCM_SEQ_MASK);
1214 rd->channel = (swheader & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT;
1215 if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
1216 type != BRCMF_SDIO_FT_SUPER) {
1217 brcmf_err("HW header length too long\n");
1218 bus->sdcnt.rx_toolong++;
1219 brcmf_sdio_rxfail(bus, false, false);
1220 rd->len = 0;
1221 return -EPROTO;
1222 }
1223 if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) {
1224 brcmf_err("Wrong channel for superframe\n");
1225 rd->len = 0;
1226 return -EINVAL;
1227 }
1228 if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL &&
1229 rd->channel != SDPCM_EVENT_CHANNEL) {
1230 brcmf_err("Wrong channel for subframe\n");
1231 rd->len = 0;
1232 return -EINVAL;
1233 }
1234 rd->dat_offset = brcmf_sdio_getdatoffset(header);
1235 if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
1236 brcmf_err("seq %d: bad data offset\n", rx_seq);
1237 bus->sdcnt.rx_badhdr++;
1238 brcmf_sdio_rxfail(bus, false, false);
1239 rd->len = 0;
1240 return -ENXIO;
1241 }
1242 if (rd->seq_num != rx_seq) {
1243 brcmf_err("seq %d: sequence number error, expect %d\n",
1244 rx_seq, rd->seq_num);
1245 bus->sdcnt.rx_badseq++;
1246 rd->seq_num = rx_seq;
1247 }
1248 /* no need to check the reset for subframe */
1249 if (type == BRCMF_SDIO_FT_SUB)
1250 return 0;
1251 rd->len_nxtfrm = (swheader & SDPCM_NEXTLEN_MASK) >> SDPCM_NEXTLEN_SHIFT;
1252 if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
1253 /* only warm for NON glom packet */
1254 if (rd->channel != SDPCM_GLOM_CHANNEL)
1255 brcmf_err("seq %d: next length error\n", rx_seq);
1256 rd->len_nxtfrm = 0;
1257 }
1258 swheader = le32_to_cpu(*(__le32 *)(header + 4));
1259 fc = swheader & SDPCM_FCMASK_MASK;
1260 if (bus->flowcontrol != fc) {
1261 if (~bus->flowcontrol & fc)
1262 bus->sdcnt.fc_xoff++;
1263 if (bus->flowcontrol & ~fc)
1264 bus->sdcnt.fc_xon++;
1265 bus->sdcnt.fc_rcvd++;
1266 bus->flowcontrol = fc;
1267 }
1268 tx_seq_max = (swheader & SDPCM_WINDOW_MASK) >> SDPCM_WINDOW_SHIFT;
1269 if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
1270 brcmf_err("seq %d: max tx seq number error\n", rx_seq);
1271 tx_seq_max = bus->tx_seq + 2;
1272 }
1273 bus->tx_max = tx_seq_max;
1274
1275 return 0;
1276 }
1277
1278 static inline void brcmf_sdio_update_hwhdr(u8 *header, u16 frm_length)
1279 {
1280 *(__le16 *)header = cpu_to_le16(frm_length);
1281 *(((__le16 *)header) + 1) = cpu_to_le16(~frm_length);
1282 }
1283
1284 static void brcmf_sdio_hdpack(struct brcmf_sdio *bus, u8 *header,
1285 struct brcmf_sdio_hdrinfo *hd_info)
1286 {
1287 u32 hdrval;
1288 u8 hdr_offset;
1289
1290 brcmf_sdio_update_hwhdr(header, hd_info->len);
1291 hdr_offset = SDPCM_HWHDR_LEN;
1292
1293 if (bus->txglom) {
1294 hdrval = (hd_info->len - hdr_offset) | (hd_info->lastfrm << 24);
1295 *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval);
1296 hdrval = (u16)hd_info->tail_pad << 16;
1297 *(((__le32 *)(header + hdr_offset)) + 1) = cpu_to_le32(hdrval);
1298 hdr_offset += SDPCM_HWEXT_LEN;
1299 }
1300
1301 hdrval = hd_info->seq_num;
1302 hdrval |= (hd_info->channel << SDPCM_CHANNEL_SHIFT) &
1303 SDPCM_CHANNEL_MASK;
1304 hdrval |= (hd_info->dat_offset << SDPCM_DOFFSET_SHIFT) &
1305 SDPCM_DOFFSET_MASK;
1306 *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval);
1307 *(((__le32 *)(header + hdr_offset)) + 1) = 0;
1308 trace_brcmf_sdpcm_hdr(SDPCM_TX + !!(bus->txglom), header);
1309 }
1310
1311 static u8 brcmf_sdio_rxglom(struct brcmf_sdio *bus, u8 rxseq)
1312 {
1313 u16 dlen, totlen;
1314 u8 *dptr, num = 0;
1315 u16 sublen;
1316 struct sk_buff *pfirst, *pnext;
1317
1318 int errcode;
1319 u8 doff, sfdoff;
1320
1321 struct brcmf_sdio_hdrinfo rd_new;
1322
1323 /* If packets, issue read(s) and send up packet chain */
1324 /* Return sequence numbers consumed? */
1325
1326 brcmf_dbg(SDIO, "start: glomd %p glom %p\n",
1327 bus->glomd, skb_peek(&bus->glom));
1328
1329 /* If there's a descriptor, generate the packet chain */
1330 if (bus->glomd) {
1331 pfirst = pnext = NULL;
1332 dlen = (u16) (bus->glomd->len);
1333 dptr = bus->glomd->data;
1334 if (!dlen || (dlen & 1)) {
1335 brcmf_err("bad glomd len(%d), ignore descriptor\n",
1336 dlen);
1337 dlen = 0;
1338 }
1339
1340 for (totlen = num = 0; dlen; num++) {
1341 /* Get (and move past) next length */
1342 sublen = get_unaligned_le16(dptr);
1343 dlen -= sizeof(u16);
1344 dptr += sizeof(u16);
1345 if ((sublen < SDPCM_HDRLEN) ||
1346 ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1347 brcmf_err("descriptor len %d bad: %d\n",
1348 num, sublen);
1349 pnext = NULL;
1350 break;
1351 }
1352 if (sublen % bus->sgentry_align) {
1353 brcmf_err("sublen %d not multiple of %d\n",
1354 sublen, bus->sgentry_align);
1355 }
1356 totlen += sublen;
1357
1358 /* For last frame, adjust read len so total
1359 is a block multiple */
1360 if (!dlen) {
1361 sublen +=
1362 (roundup(totlen, bus->blocksize) - totlen);
1363 totlen = roundup(totlen, bus->blocksize);
1364 }
1365
1366 /* Allocate/chain packet for next subframe */
1367 pnext = brcmu_pkt_buf_get_skb(sublen + bus->sgentry_align);
1368 if (pnext == NULL) {
1369 brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
1370 num, sublen);
1371 break;
1372 }
1373 skb_queue_tail(&bus->glom, pnext);
1374
1375 /* Adhere to start alignment requirements */
1376 pkt_align(pnext, sublen, bus->sgentry_align);
1377 }
1378
1379 /* If all allocations succeeded, save packet chain
1380 in bus structure */
1381 if (pnext) {
1382 brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1383 totlen, num);
1384 if (BRCMF_GLOM_ON() && bus->cur_read.len &&
1385 totlen != bus->cur_read.len) {
1386 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1387 bus->cur_read.len, totlen, rxseq);
1388 }
1389 pfirst = pnext = NULL;
1390 } else {
1391 brcmf_sdio_free_glom(bus);
1392 num = 0;
1393 }
1394
1395 /* Done with descriptor packet */
1396 brcmu_pkt_buf_free_skb(bus->glomd);
1397 bus->glomd = NULL;
1398 bus->cur_read.len = 0;
1399 }
1400
1401 /* Ok -- either we just generated a packet chain,
1402 or had one from before */
1403 if (!skb_queue_empty(&bus->glom)) {
1404 if (BRCMF_GLOM_ON()) {
1405 brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
1406 skb_queue_walk(&bus->glom, pnext) {
1407 brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n",
1408 pnext, (u8 *) (pnext->data),
1409 pnext->len, pnext->len);
1410 }
1411 }
1412
1413 pfirst = skb_peek(&bus->glom);
1414 dlen = (u16) brcmf_sdio_glom_len(bus);
1415
1416 /* Do an SDIO read for the superframe. Configurable iovar to
1417 * read directly into the chained packet, or allocate a large
1418 * packet and and copy into the chain.
1419 */
1420 sdio_claim_host(bus->sdiodev->func[1]);
1421 errcode = brcmf_sdiod_recv_chain(bus->sdiodev,
1422 &bus->glom, dlen);
1423 sdio_release_host(bus->sdiodev->func[1]);
1424 bus->sdcnt.f2rxdata++;
1425
1426 /* On failure, kill the superframe, allow a couple retries */
1427 if (errcode < 0) {
1428 brcmf_err("glom read of %d bytes failed: %d\n",
1429 dlen, errcode);
1430
1431 sdio_claim_host(bus->sdiodev->func[1]);
1432 if (bus->glomerr++ < 3) {
1433 brcmf_sdio_rxfail(bus, true, true);
1434 } else {
1435 bus->glomerr = 0;
1436 brcmf_sdio_rxfail(bus, true, false);
1437 bus->sdcnt.rxglomfail++;
1438 brcmf_sdio_free_glom(bus);
1439 }
1440 sdio_release_host(bus->sdiodev->func[1]);
1441 return 0;
1442 }
1443
1444 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1445 pfirst->data, min_t(int, pfirst->len, 48),
1446 "SUPERFRAME:\n");
1447
1448 rd_new.seq_num = rxseq;
1449 rd_new.len = dlen;
1450 sdio_claim_host(bus->sdiodev->func[1]);
1451 errcode = brcmf_sdio_hdparse(bus, pfirst->data, &rd_new,
1452 BRCMF_SDIO_FT_SUPER);
1453 sdio_release_host(bus->sdiodev->func[1]);
1454 bus->cur_read.len = rd_new.len_nxtfrm << 4;
1455
1456 /* Remove superframe header, remember offset */
1457 skb_pull(pfirst, rd_new.dat_offset);
1458 sfdoff = rd_new.dat_offset;
1459 num = 0;
1460
1461 /* Validate all the subframe headers */
1462 skb_queue_walk(&bus->glom, pnext) {
1463 /* leave when invalid subframe is found */
1464 if (errcode)
1465 break;
1466
1467 rd_new.len = pnext->len;
1468 rd_new.seq_num = rxseq++;
1469 sdio_claim_host(bus->sdiodev->func[1]);
1470 errcode = brcmf_sdio_hdparse(bus, pnext->data, &rd_new,
1471 BRCMF_SDIO_FT_SUB);
1472 sdio_release_host(bus->sdiodev->func[1]);
1473 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1474 pnext->data, 32, "subframe:\n");
1475
1476 num++;
1477 }
1478
1479 if (errcode) {
1480 /* Terminate frame on error, request
1481 a couple retries */
1482 sdio_claim_host(bus->sdiodev->func[1]);
1483 if (bus->glomerr++ < 3) {
1484 /* Restore superframe header space */
1485 skb_push(pfirst, sfdoff);
1486 brcmf_sdio_rxfail(bus, true, true);
1487 } else {
1488 bus->glomerr = 0;
1489 brcmf_sdio_rxfail(bus, true, false);
1490 bus->sdcnt.rxglomfail++;
1491 brcmf_sdio_free_glom(bus);
1492 }
1493 sdio_release_host(bus->sdiodev->func[1]);
1494 bus->cur_read.len = 0;
1495 return 0;
1496 }
1497
1498 /* Basic SD framing looks ok - process each packet (header) */
1499
1500 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
1501 dptr = (u8 *) (pfirst->data);
1502 sublen = get_unaligned_le16(dptr);
1503 doff = brcmf_sdio_getdatoffset(&dptr[SDPCM_HWHDR_LEN]);
1504
1505 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1506 dptr, pfirst->len,
1507 "Rx Subframe Data:\n");
1508
1509 __skb_trim(pfirst, sublen);
1510 skb_pull(pfirst, doff);
1511
1512 if (pfirst->len == 0) {
1513 skb_unlink(pfirst, &bus->glom);
1514 brcmu_pkt_buf_free_skb(pfirst);
1515 continue;
1516 }
1517
1518 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1519 pfirst->data,
1520 min_t(int, pfirst->len, 32),
1521 "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1522 bus->glom.qlen, pfirst, pfirst->data,
1523 pfirst->len, pfirst->next,
1524 pfirst->prev);
1525 skb_unlink(pfirst, &bus->glom);
1526 brcmf_rx_frame(bus->sdiodev->dev, pfirst);
1527 bus->sdcnt.rxglompkts++;
1528 }
1529
1530 bus->sdcnt.rxglomframes++;
1531 }
1532 return num;
1533 }
1534
1535 static int brcmf_sdio_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
1536 bool *pending)
1537 {
1538 DECLARE_WAITQUEUE(wait, current);
1539 int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT);
1540
1541 /* Wait until control frame is available */
1542 add_wait_queue(&bus->dcmd_resp_wait, &wait);
1543 set_current_state(TASK_INTERRUPTIBLE);
1544
1545 while (!(*condition) && (!signal_pending(current) && timeout))
1546 timeout = schedule_timeout(timeout);
1547
1548 if (signal_pending(current))
1549 *pending = true;
1550
1551 set_current_state(TASK_RUNNING);
1552 remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1553
1554 return timeout;
1555 }
1556
1557 static int brcmf_sdio_dcmd_resp_wake(struct brcmf_sdio *bus)
1558 {
1559 if (waitqueue_active(&bus->dcmd_resp_wait))
1560 wake_up_interruptible(&bus->dcmd_resp_wait);
1561
1562 return 0;
1563 }
1564 static void
1565 brcmf_sdio_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
1566 {
1567 uint rdlen, pad;
1568 u8 *buf = NULL, *rbuf;
1569 int sdret;
1570
1571 brcmf_dbg(TRACE, "Enter\n");
1572
1573 if (bus->rxblen)
1574 buf = vzalloc(bus->rxblen);
1575 if (!buf)
1576 goto done;
1577
1578 rbuf = bus->rxbuf;
1579 pad = ((unsigned long)rbuf % bus->head_align);
1580 if (pad)
1581 rbuf += (bus->head_align - pad);
1582
1583 /* Copy the already-read portion over */
1584 memcpy(buf, hdr, BRCMF_FIRSTREAD);
1585 if (len <= BRCMF_FIRSTREAD)
1586 goto gotpkt;
1587
1588 /* Raise rdlen to next SDIO block to avoid tail command */
1589 rdlen = len - BRCMF_FIRSTREAD;
1590 if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1591 pad = bus->blocksize - (rdlen % bus->blocksize);
1592 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1593 ((len + pad) < bus->sdiodev->bus_if->maxctl))
1594 rdlen += pad;
1595 } else if (rdlen % bus->head_align) {
1596 rdlen += bus->head_align - (rdlen % bus->head_align);
1597 }
1598
1599 /* Drop if the read is too big or it exceeds our maximum */
1600 if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
1601 brcmf_err("%d-byte control read exceeds %d-byte buffer\n",
1602 rdlen, bus->sdiodev->bus_if->maxctl);
1603 brcmf_sdio_rxfail(bus, false, false);
1604 goto done;
1605 }
1606
1607 if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
1608 brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
1609 len, len - doff, bus->sdiodev->bus_if->maxctl);
1610 bus->sdcnt.rx_toolong++;
1611 brcmf_sdio_rxfail(bus, false, false);
1612 goto done;
1613 }
1614
1615 /* Read remain of frame body */
1616 sdret = brcmf_sdiod_recv_buf(bus->sdiodev, rbuf, rdlen);
1617 bus->sdcnt.f2rxdata++;
1618
1619 /* Control frame failures need retransmission */
1620 if (sdret < 0) {
1621 brcmf_err("read %d control bytes failed: %d\n",
1622 rdlen, sdret);
1623 bus->sdcnt.rxc_errors++;
1624 brcmf_sdio_rxfail(bus, true, true);
1625 goto done;
1626 } else
1627 memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen);
1628
1629 gotpkt:
1630
1631 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
1632 buf, len, "RxCtrl:\n");
1633
1634 /* Point to valid data and indicate its length */
1635 spin_lock_bh(&bus->rxctl_lock);
1636 if (bus->rxctl) {
1637 brcmf_err("last control frame is being processed.\n");
1638 spin_unlock_bh(&bus->rxctl_lock);
1639 vfree(buf);
1640 goto done;
1641 }
1642 bus->rxctl = buf + doff;
1643 bus->rxctl_orig = buf;
1644 bus->rxlen = len - doff;
1645 spin_unlock_bh(&bus->rxctl_lock);
1646
1647 done:
1648 /* Awake any waiters */
1649 brcmf_sdio_dcmd_resp_wake(bus);
1650 }
1651
1652 /* Pad read to blocksize for efficiency */
1653 static void brcmf_sdio_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
1654 {
1655 if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1656 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1657 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1658 *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1659 *rdlen += *pad;
1660 } else if (*rdlen % bus->head_align) {
1661 *rdlen += bus->head_align - (*rdlen % bus->head_align);
1662 }
1663 }
1664
1665 static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
1666 {
1667 struct sk_buff *pkt; /* Packet for event or data frames */
1668 u16 pad; /* Number of pad bytes to read */
1669 uint rxleft = 0; /* Remaining number of frames allowed */
1670 int ret; /* Return code from calls */
1671 uint rxcount = 0; /* Total frames read */
1672 struct brcmf_sdio_hdrinfo *rd = &bus->cur_read, rd_new;
1673 u8 head_read = 0;
1674
1675 brcmf_dbg(TRACE, "Enter\n");
1676
1677 /* Not finished unless we encounter no more frames indication */
1678 bus->rxpending = true;
1679
1680 for (rd->seq_num = bus->rx_seq, rxleft = maxframes;
1681 !bus->rxskip && rxleft && brcmf_bus_ready(bus->sdiodev->bus_if);
1682 rd->seq_num++, rxleft--) {
1683
1684 /* Handle glomming separately */
1685 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
1686 u8 cnt;
1687 brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
1688 bus->glomd, skb_peek(&bus->glom));
1689 cnt = brcmf_sdio_rxglom(bus, rd->seq_num);
1690 brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1691 rd->seq_num += cnt - 1;
1692 rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1693 continue;
1694 }
1695
1696 rd->len_left = rd->len;
1697 /* read header first for unknow frame length */
1698 sdio_claim_host(bus->sdiodev->func[1]);
1699 if (!rd->len) {
1700 ret = brcmf_sdiod_recv_buf(bus->sdiodev,
1701 bus->rxhdr, BRCMF_FIRSTREAD);
1702 bus->sdcnt.f2rxhdrs++;
1703 if (ret < 0) {
1704 brcmf_err("RXHEADER FAILED: %d\n",
1705 ret);
1706 bus->sdcnt.rx_hdrfail++;
1707 brcmf_sdio_rxfail(bus, true, true);
1708 sdio_release_host(bus->sdiodev->func[1]);
1709 continue;
1710 }
1711
1712 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
1713 bus->rxhdr, SDPCM_HDRLEN,
1714 "RxHdr:\n");
1715
1716 if (brcmf_sdio_hdparse(bus, bus->rxhdr, rd,
1717 BRCMF_SDIO_FT_NORMAL)) {
1718 sdio_release_host(bus->sdiodev->func[1]);
1719 if (!bus->rxpending)
1720 break;
1721 else
1722 continue;
1723 }
1724
1725 if (rd->channel == SDPCM_CONTROL_CHANNEL) {
1726 brcmf_sdio_read_control(bus, bus->rxhdr,
1727 rd->len,
1728 rd->dat_offset);
1729 /* prepare the descriptor for the next read */
1730 rd->len = rd->len_nxtfrm << 4;
1731 rd->len_nxtfrm = 0;
1732 /* treat all packet as event if we don't know */
1733 rd->channel = SDPCM_EVENT_CHANNEL;
1734 sdio_release_host(bus->sdiodev->func[1]);
1735 continue;
1736 }
1737 rd->len_left = rd->len > BRCMF_FIRSTREAD ?
1738 rd->len - BRCMF_FIRSTREAD : 0;
1739 head_read = BRCMF_FIRSTREAD;
1740 }
1741
1742 brcmf_sdio_pad(bus, &pad, &rd->len_left);
1743
1744 pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read +
1745 bus->head_align);
1746 if (!pkt) {
1747 /* Give up on data, request rtx of events */
1748 brcmf_err("brcmu_pkt_buf_get_skb failed\n");
1749 brcmf_sdio_rxfail(bus, false,
1750 RETRYCHAN(rd->channel));
1751 sdio_release_host(bus->sdiodev->func[1]);
1752 continue;
1753 }
1754 skb_pull(pkt, head_read);
1755 pkt_align(pkt, rd->len_left, bus->head_align);
1756
1757 ret = brcmf_sdiod_recv_pkt(bus->sdiodev, pkt);
1758 bus->sdcnt.f2rxdata++;
1759 sdio_release_host(bus->sdiodev->func[1]);
1760
1761 if (ret < 0) {
1762 brcmf_err("read %d bytes from channel %d failed: %d\n",
1763 rd->len, rd->channel, ret);
1764 brcmu_pkt_buf_free_skb(pkt);
1765 sdio_claim_host(bus->sdiodev->func[1]);
1766 brcmf_sdio_rxfail(bus, true,
1767 RETRYCHAN(rd->channel));
1768 sdio_release_host(bus->sdiodev->func[1]);
1769 continue;
1770 }
1771
1772 if (head_read) {
1773 skb_push(pkt, head_read);
1774 memcpy(pkt->data, bus->rxhdr, head_read);
1775 head_read = 0;
1776 } else {
1777 memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
1778 rd_new.seq_num = rd->seq_num;
1779 sdio_claim_host(bus->sdiodev->func[1]);
1780 if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new,
1781 BRCMF_SDIO_FT_NORMAL)) {
1782 rd->len = 0;
1783 brcmu_pkt_buf_free_skb(pkt);
1784 }
1785 bus->sdcnt.rx_readahead_cnt++;
1786 if (rd->len != roundup(rd_new.len, 16)) {
1787 brcmf_err("frame length mismatch:read %d, should be %d\n",
1788 rd->len,
1789 roundup(rd_new.len, 16) >> 4);
1790 rd->len = 0;
1791 brcmf_sdio_rxfail(bus, true, true);
1792 sdio_release_host(bus->sdiodev->func[1]);
1793 brcmu_pkt_buf_free_skb(pkt);
1794 continue;
1795 }
1796 sdio_release_host(bus->sdiodev->func[1]);
1797 rd->len_nxtfrm = rd_new.len_nxtfrm;
1798 rd->channel = rd_new.channel;
1799 rd->dat_offset = rd_new.dat_offset;
1800
1801 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1802 BRCMF_DATA_ON()) &&
1803 BRCMF_HDRS_ON(),
1804 bus->rxhdr, SDPCM_HDRLEN,
1805 "RxHdr:\n");
1806
1807 if (rd_new.channel == SDPCM_CONTROL_CHANNEL) {
1808 brcmf_err("readahead on control packet %d?\n",
1809 rd_new.seq_num);
1810 /* Force retry w/normal header read */
1811 rd->len = 0;
1812 sdio_claim_host(bus->sdiodev->func[1]);
1813 brcmf_sdio_rxfail(bus, false, true);
1814 sdio_release_host(bus->sdiodev->func[1]);
1815 brcmu_pkt_buf_free_skb(pkt);
1816 continue;
1817 }
1818 }
1819
1820 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1821 pkt->data, rd->len, "Rx Data:\n");
1822
1823 /* Save superframe descriptor and allocate packet frame */
1824 if (rd->channel == SDPCM_GLOM_CHANNEL) {
1825 if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_HWHDR_LEN])) {
1826 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
1827 rd->len);
1828 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1829 pkt->data, rd->len,
1830 "Glom Data:\n");
1831 __skb_trim(pkt, rd->len);
1832 skb_pull(pkt, SDPCM_HDRLEN);
1833 bus->glomd = pkt;
1834 } else {
1835 brcmf_err("%s: glom superframe w/o "
1836 "descriptor!\n", __func__);
1837 sdio_claim_host(bus->sdiodev->func[1]);
1838 brcmf_sdio_rxfail(bus, false, false);
1839 sdio_release_host(bus->sdiodev->func[1]);
1840 }
1841 /* prepare the descriptor for the next read */
1842 rd->len = rd->len_nxtfrm << 4;
1843 rd->len_nxtfrm = 0;
1844 /* treat all packet as event if we don't know */
1845 rd->channel = SDPCM_EVENT_CHANNEL;
1846 continue;
1847 }
1848
1849 /* Fill in packet len and prio, deliver upward */
1850 __skb_trim(pkt, rd->len);
1851 skb_pull(pkt, rd->dat_offset);
1852
1853 /* prepare the descriptor for the next read */
1854 rd->len = rd->len_nxtfrm << 4;
1855 rd->len_nxtfrm = 0;
1856 /* treat all packet as event if we don't know */
1857 rd->channel = SDPCM_EVENT_CHANNEL;
1858
1859 if (pkt->len == 0) {
1860 brcmu_pkt_buf_free_skb(pkt);
1861 continue;
1862 }
1863
1864 brcmf_rx_frame(bus->sdiodev->dev, pkt);
1865 }
1866
1867 rxcount = maxframes - rxleft;
1868 /* Message if we hit the limit */
1869 if (!rxleft)
1870 brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes);
1871 else
1872 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
1873 /* Back off rxseq if awaiting rtx, update rx_seq */
1874 if (bus->rxskip)
1875 rd->seq_num--;
1876 bus->rx_seq = rd->seq_num;
1877
1878 return rxcount;
1879 }
1880
1881 static void
1882 brcmf_sdio_wait_event_wakeup(struct brcmf_sdio *bus)
1883 {
1884 if (waitqueue_active(&bus->ctrl_wait))
1885 wake_up_interruptible(&bus->ctrl_wait);
1886 return;
1887 }
1888
1889 static int brcmf_sdio_txpkt_hdalign(struct brcmf_sdio *bus, struct sk_buff *pkt)
1890 {
1891 u16 head_pad;
1892 u8 *dat_buf;
1893
1894 dat_buf = (u8 *)(pkt->data);
1895
1896 /* Check head padding */
1897 head_pad = ((unsigned long)dat_buf % bus->head_align);
1898 if (head_pad) {
1899 if (skb_headroom(pkt) < head_pad) {
1900 bus->sdiodev->bus_if->tx_realloc++;
1901 head_pad = 0;
1902 if (skb_cow(pkt, head_pad))
1903 return -ENOMEM;
1904 }
1905 skb_push(pkt, head_pad);
1906 dat_buf = (u8 *)(pkt->data);
1907 memset(dat_buf, 0, head_pad + bus->tx_hdrlen);
1908 }
1909 return head_pad;
1910 }
1911
1912 /**
1913 * struct brcmf_skbuff_cb reserves first two bytes in sk_buff::cb for
1914 * bus layer usage.
1915 */
1916 /* flag marking a dummy skb added for DMA alignment requirement */
1917 #define ALIGN_SKB_FLAG 0x8000
1918 /* bit mask of data length chopped from the previous packet */
1919 #define ALIGN_SKB_CHOP_LEN_MASK 0x7fff
1920
1921 static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus,
1922 struct sk_buff_head *pktq,
1923 struct sk_buff *pkt, u16 total_len)
1924 {
1925 struct brcmf_sdio_dev *sdiodev;
1926 struct sk_buff *pkt_pad;
1927 u16 tail_pad, tail_chop, chain_pad;
1928 unsigned int blksize;
1929 bool lastfrm;
1930 int ntail, ret;
1931
1932 sdiodev = bus->sdiodev;
1933 blksize = sdiodev->func[SDIO_FUNC_2]->cur_blksize;
1934 /* sg entry alignment should be a divisor of block size */
1935 WARN_ON(blksize % bus->sgentry_align);
1936
1937 /* Check tail padding */
1938 lastfrm = skb_queue_is_last(pktq, pkt);
1939 tail_pad = 0;
1940 tail_chop = pkt->len % bus->sgentry_align;
1941 if (tail_chop)
1942 tail_pad = bus->sgentry_align - tail_chop;
1943 chain_pad = (total_len + tail_pad) % blksize;
1944 if (lastfrm && chain_pad)
1945 tail_pad += blksize - chain_pad;
1946 if (skb_tailroom(pkt) < tail_pad && pkt->len > blksize) {
1947 pkt_pad = bus->txglom_sgpad;
1948 if (pkt_pad == NULL)
1949 brcmu_pkt_buf_get_skb(tail_pad + tail_chop);
1950 if (pkt_pad == NULL)
1951 return -ENOMEM;
1952 ret = brcmf_sdio_txpkt_hdalign(bus, pkt_pad);
1953 if (unlikely(ret < 0))
1954 return ret;
1955 memcpy(pkt_pad->data,
1956 pkt->data + pkt->len - tail_chop,
1957 tail_chop);
1958 *(u32 *)(pkt_pad->cb) = ALIGN_SKB_FLAG + tail_chop;
1959 skb_trim(pkt, pkt->len - tail_chop);
1960 __skb_queue_after(pktq, pkt, pkt_pad);
1961 } else {
1962 ntail = pkt->data_len + tail_pad -
1963 (pkt->end - pkt->tail);
1964 if (skb_cloned(pkt) || ntail > 0)
1965 if (pskb_expand_head(pkt, 0, ntail, GFP_ATOMIC))
1966 return -ENOMEM;
1967 if (skb_linearize(pkt))
1968 return -ENOMEM;
1969 __skb_put(pkt, tail_pad);
1970 }
1971
1972 return tail_pad;
1973 }
1974
1975 /**
1976 * brcmf_sdio_txpkt_prep - packet preparation for transmit
1977 * @bus: brcmf_sdio structure pointer
1978 * @pktq: packet list pointer
1979 * @chan: virtual channel to transmit the packet
1980 *
1981 * Processes to be applied to the packet
1982 * - Align data buffer pointer
1983 * - Align data buffer length
1984 * - Prepare header
1985 * Return: negative value if there is error
1986 */
1987 static int
1988 brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
1989 uint chan)
1990 {
1991 u16 head_pad, total_len;
1992 struct sk_buff *pkt_next;
1993 u8 txseq;
1994 int ret;
1995 struct brcmf_sdio_hdrinfo hd_info = {0};
1996
1997 txseq = bus->tx_seq;
1998 total_len = 0;
1999 skb_queue_walk(pktq, pkt_next) {
2000 /* alignment packet inserted in previous
2001 * loop cycle can be skipped as it is
2002 * already properly aligned and does not
2003 * need an sdpcm header.
2004 */
2005 if (*(u32 *)(pkt_next->cb) & ALIGN_SKB_FLAG)
2006 continue;
2007
2008 /* align packet data pointer */
2009 ret = brcmf_sdio_txpkt_hdalign(bus, pkt_next);
2010 if (ret < 0)
2011 return ret;
2012 head_pad = (u16)ret;
2013 if (head_pad)
2014 memset(pkt_next->data, 0, head_pad + bus->tx_hdrlen);
2015
2016 total_len += pkt_next->len;
2017
2018 hd_info.len = pkt_next->len;
2019 hd_info.lastfrm = skb_queue_is_last(pktq, pkt_next);
2020 if (bus->txglom && pktq->qlen > 1) {
2021 ret = brcmf_sdio_txpkt_prep_sg(bus, pktq,
2022 pkt_next, total_len);
2023 if (ret < 0)
2024 return ret;
2025 hd_info.tail_pad = (u16)ret;
2026 total_len += (u16)ret;
2027 }
2028
2029 hd_info.channel = chan;
2030 hd_info.dat_offset = head_pad + bus->tx_hdrlen;
2031 hd_info.seq_num = txseq++;
2032
2033 /* Now fill the header */
2034 brcmf_sdio_hdpack(bus, pkt_next->data, &hd_info);
2035
2036 if (BRCMF_BYTES_ON() &&
2037 ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
2038 (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)))
2039 brcmf_dbg_hex_dump(true, pkt_next, hd_info.len,
2040 "Tx Frame:\n");
2041 else if (BRCMF_HDRS_ON())
2042 brcmf_dbg_hex_dump(true, pkt_next,
2043 head_pad + bus->tx_hdrlen,
2044 "Tx Header:\n");
2045 }
2046 /* Hardware length tag of the first packet should be total
2047 * length of the chain (including padding)
2048 */
2049 if (bus->txglom)
2050 brcmf_sdio_update_hwhdr(pktq->next->data, total_len);
2051 return 0;
2052 }
2053
2054 /**
2055 * brcmf_sdio_txpkt_postp - packet post processing for transmit
2056 * @bus: brcmf_sdio structure pointer
2057 * @pktq: packet list pointer
2058 *
2059 * Processes to be applied to the packet
2060 * - Remove head padding
2061 * - Remove tail padding
2062 */
2063 static void
2064 brcmf_sdio_txpkt_postp(struct brcmf_sdio *bus, struct sk_buff_head *pktq)
2065 {
2066 u8 *hdr;
2067 u32 dat_offset;
2068 u16 tail_pad;
2069 u32 dummy_flags, chop_len;
2070 struct sk_buff *pkt_next, *tmp, *pkt_prev;
2071
2072 skb_queue_walk_safe(pktq, pkt_next, tmp) {
2073 dummy_flags = *(u32 *)(pkt_next->cb);
2074 if (dummy_flags & ALIGN_SKB_FLAG) {
2075 chop_len = dummy_flags & ALIGN_SKB_CHOP_LEN_MASK;
2076 if (chop_len) {
2077 pkt_prev = pkt_next->prev;
2078 skb_put(pkt_prev, chop_len);
2079 }
2080 __skb_unlink(pkt_next, pktq);
2081 brcmu_pkt_buf_free_skb(pkt_next);
2082 } else {
2083 hdr = pkt_next->data + bus->tx_hdrlen - SDPCM_SWHDR_LEN;
2084 dat_offset = le32_to_cpu(*(__le32 *)hdr);
2085 dat_offset = (dat_offset & SDPCM_DOFFSET_MASK) >>
2086 SDPCM_DOFFSET_SHIFT;
2087 skb_pull(pkt_next, dat_offset);
2088 if (bus->txglom) {
2089 tail_pad = le16_to_cpu(*(__le16 *)(hdr - 2));
2090 skb_trim(pkt_next, pkt_next->len - tail_pad);
2091 }
2092 }
2093 }
2094 }
2095
2096 /* Writes a HW/SW header into the packet and sends it. */
2097 /* Assumes: (a) header space already there, (b) caller holds lock */
2098 static int brcmf_sdio_txpkt(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
2099 uint chan)
2100 {
2101 int ret;
2102 int i;
2103 struct sk_buff *pkt_next, *tmp;
2104
2105 brcmf_dbg(TRACE, "Enter\n");
2106
2107 ret = brcmf_sdio_txpkt_prep(bus, pktq, chan);
2108 if (ret)
2109 goto done;
2110
2111 sdio_claim_host(bus->sdiodev->func[1]);
2112 ret = brcmf_sdiod_send_pkt(bus->sdiodev, pktq);
2113 bus->sdcnt.f2txdata++;
2114
2115 if (ret < 0) {
2116 /* On failure, abort the command and terminate the frame */
2117 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2118 ret);
2119 bus->sdcnt.tx_sderrs++;
2120
2121 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
2122 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2123 SFC_WF_TERM, NULL);
2124 bus->sdcnt.f1regdata++;
2125
2126 for (i = 0; i < 3; i++) {
2127 u8 hi, lo;
2128 hi = brcmf_sdiod_regrb(bus->sdiodev,
2129 SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2130 lo = brcmf_sdiod_regrb(bus->sdiodev,
2131 SBSDIO_FUNC1_WFRAMEBCLO, NULL);
2132 bus->sdcnt.f1regdata += 2;
2133 if ((hi == 0) && (lo == 0))
2134 break;
2135 }
2136 }
2137 sdio_release_host(bus->sdiodev->func[1]);
2138
2139 done:
2140 brcmf_sdio_txpkt_postp(bus, pktq);
2141 if (ret == 0)
2142 bus->tx_seq = (bus->tx_seq + pktq->qlen) % SDPCM_SEQ_WRAP;
2143 skb_queue_walk_safe(pktq, pkt_next, tmp) {
2144 __skb_unlink(pkt_next, pktq);
2145 brcmf_txcomplete(bus->sdiodev->dev, pkt_next, ret == 0);
2146 }
2147 return ret;
2148 }
2149
2150 static uint brcmf_sdio_sendfromq(struct brcmf_sdio *bus, uint maxframes)
2151 {
2152 struct sk_buff *pkt;
2153 struct sk_buff_head pktq;
2154 u32 intstatus = 0;
2155 int ret = 0, prec_out, i;
2156 uint cnt = 0;
2157 u8 tx_prec_map, pkt_num;
2158
2159 brcmf_dbg(TRACE, "Enter\n");
2160
2161 tx_prec_map = ~bus->flowcontrol;
2162
2163 /* Send frames until the limit or some other event */
2164 for (cnt = 0; (cnt < maxframes) && data_ok(bus);) {
2165 pkt_num = 1;
2166 __skb_queue_head_init(&pktq);
2167 if (bus->txglom)
2168 pkt_num = min_t(u8, bus->tx_max - bus->tx_seq,
2169 brcmf_sdio_txglomsz);
2170 pkt_num = min_t(u32, pkt_num,
2171 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol));
2172 spin_lock_bh(&bus->txqlock);
2173 for (i = 0; i < pkt_num; i++) {
2174 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map,
2175 &prec_out);
2176 if (pkt == NULL)
2177 break;
2178 __skb_queue_tail(&pktq, pkt);
2179 }
2180 spin_unlock_bh(&bus->txqlock);
2181 if (i == 0)
2182 break;
2183
2184 ret = brcmf_sdio_txpkt(bus, &pktq, SDPCM_DATA_CHANNEL);
2185 cnt += i;
2186
2187 /* In poll mode, need to check for other events */
2188 if (!bus->intr && cnt) {
2189 /* Check device status, signal pending interrupt */
2190 sdio_claim_host(bus->sdiodev->func[1]);
2191 ret = r_sdreg32(bus, &intstatus,
2192 offsetof(struct sdpcmd_regs,
2193 intstatus));
2194 sdio_release_host(bus->sdiodev->func[1]);
2195 bus->sdcnt.f2txdata++;
2196 if (ret != 0)
2197 break;
2198 if (intstatus & bus->hostintmask)
2199 atomic_set(&bus->ipend, 1);
2200 }
2201 }
2202
2203 /* Deflow-control stack if needed */
2204 if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) &&
2205 bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
2206 bus->txoff = false;
2207 brcmf_txflowblock(bus->sdiodev->dev, false);
2208 }
2209
2210 return cnt;
2211 }
2212
2213 static void brcmf_sdio_bus_stop(struct device *dev)
2214 {
2215 u32 local_hostintmask;
2216 u8 saveclk;
2217 int err;
2218 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2219 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2220 struct brcmf_sdio *bus = sdiodev->bus;
2221
2222 brcmf_dbg(TRACE, "Enter\n");
2223
2224 if (bus->watchdog_tsk) {
2225 send_sig(SIGTERM, bus->watchdog_tsk, 1);
2226 kthread_stop(bus->watchdog_tsk);
2227 bus->watchdog_tsk = NULL;
2228 }
2229
2230 if (bus_if->state == BRCMF_BUS_DOWN) {
2231 sdio_claim_host(sdiodev->func[1]);
2232
2233 /* Enable clock for device interrupts */
2234 brcmf_sdio_bus_sleep(bus, false, false);
2235
2236 /* Disable and clear interrupts at the chip level also */
2237 w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask));
2238 local_hostintmask = bus->hostintmask;
2239 bus->hostintmask = 0;
2240
2241 /* Force backplane clocks to assure F2 interrupt propagates */
2242 saveclk = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2243 &err);
2244 if (!err)
2245 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2246 (saveclk | SBSDIO_FORCE_HT), &err);
2247 if (err)
2248 brcmf_err("Failed to force clock for F2: err %d\n",
2249 err);
2250
2251 /* Turn off the bus (F2), free any pending packets */
2252 brcmf_dbg(INTR, "disable SDIO interrupts\n");
2253 sdio_disable_func(sdiodev->func[SDIO_FUNC_2]);
2254
2255 /* Clear any pending interrupts now that F2 is disabled */
2256 w_sdreg32(bus, local_hostintmask,
2257 offsetof(struct sdpcmd_regs, intstatus));
2258
2259 sdio_release_host(sdiodev->func[1]);
2260 }
2261 /* Clear the data packet queues */
2262 brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
2263
2264 /* Clear any held glomming stuff */
2265 if (bus->glomd)
2266 brcmu_pkt_buf_free_skb(bus->glomd);
2267 brcmf_sdio_free_glom(bus);
2268
2269 /* Clear rx control and wake any waiters */
2270 spin_lock_bh(&bus->rxctl_lock);
2271 bus->rxlen = 0;
2272 spin_unlock_bh(&bus->rxctl_lock);
2273 brcmf_sdio_dcmd_resp_wake(bus);
2274
2275 /* Reset some F2 state stuff */
2276 bus->rxskip = false;
2277 bus->tx_seq = bus->rx_seq = 0;
2278 }
2279
2280 static inline void brcmf_sdio_clrintr(struct brcmf_sdio *bus)
2281 {
2282 unsigned long flags;
2283
2284 if (bus->sdiodev->oob_irq_requested) {
2285 spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags);
2286 if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) {
2287 enable_irq(bus->sdiodev->pdata->oob_irq_nr);
2288 bus->sdiodev->irq_en = true;
2289 }
2290 spin_unlock_irqrestore(&bus->sdiodev->irq_en_lock, flags);
2291 }
2292 }
2293
2294 static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus)
2295 {
2296 u8 idx;
2297 u32 addr;
2298 unsigned long val;
2299 int n, ret;
2300
2301 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
2302 addr = bus->ci->c_inf[idx].base +
2303 offsetof(struct sdpcmd_regs, intstatus);
2304
2305 val = brcmf_sdiod_regrl(bus->sdiodev, addr, &ret);
2306 bus->sdcnt.f1regdata++;
2307 if (ret != 0)
2308 val = 0;
2309
2310 val &= bus->hostintmask;
2311 atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE));
2312
2313 /* Clear interrupts */
2314 if (val) {
2315 brcmf_sdiod_regwl(bus->sdiodev, addr, val, &ret);
2316 bus->sdcnt.f1regdata++;
2317 }
2318
2319 if (ret) {
2320 atomic_set(&bus->intstatus, 0);
2321 } else if (val) {
2322 for_each_set_bit(n, &val, 32)
2323 set_bit(n, (unsigned long *)&bus->intstatus.counter);
2324 }
2325
2326 return ret;
2327 }
2328
2329 static void brcmf_sdio_dpc(struct brcmf_sdio *bus)
2330 {
2331 u32 newstatus = 0;
2332 unsigned long intstatus;
2333 uint rxlimit = bus->rxbound; /* Rx frames to read before resched */
2334 uint txlimit = bus->txbound; /* Tx frames to send before resched */
2335 uint framecnt = 0; /* Temporary counter of tx/rx frames */
2336 int err = 0, n;
2337
2338 brcmf_dbg(TRACE, "Enter\n");
2339
2340 sdio_claim_host(bus->sdiodev->func[1]);
2341
2342 /* If waiting for HTAVAIL, check status */
2343 if (!bus->sr_enabled && bus->clkstate == CLK_PENDING) {
2344 u8 clkctl, devctl = 0;
2345
2346 #ifdef DEBUG
2347 /* Check for inconsistent device control */
2348 devctl = brcmf_sdiod_regrb(bus->sdiodev,
2349 SBSDIO_DEVICE_CTL, &err);
2350 #endif /* DEBUG */
2351
2352 /* Read CSR, if clock on switch to AVAIL, else ignore */
2353 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
2354 SBSDIO_FUNC1_CHIPCLKCSR, &err);
2355
2356 brcmf_dbg(SDIO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2357 devctl, clkctl);
2358
2359 if (SBSDIO_HTAV(clkctl)) {
2360 devctl = brcmf_sdiod_regrb(bus->sdiodev,
2361 SBSDIO_DEVICE_CTL, &err);
2362 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
2363 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
2364 devctl, &err);
2365 bus->clkstate = CLK_AVAIL;
2366 }
2367 }
2368
2369 /* Make sure backplane clock is on */
2370 brcmf_sdio_bus_sleep(bus, false, true);
2371
2372 /* Pending interrupt indicates new device status */
2373 if (atomic_read(&bus->ipend) > 0) {
2374 atomic_set(&bus->ipend, 0);
2375 err = brcmf_sdio_intr_rstatus(bus);
2376 }
2377
2378 /* Start with leftover status bits */
2379 intstatus = atomic_xchg(&bus->intstatus, 0);
2380
2381 /* Handle flow-control change: read new state in case our ack
2382 * crossed another change interrupt. If change still set, assume
2383 * FC ON for safety, let next loop through do the debounce.
2384 */
2385 if (intstatus & I_HMB_FC_CHANGE) {
2386 intstatus &= ~I_HMB_FC_CHANGE;
2387 err = w_sdreg32(bus, I_HMB_FC_CHANGE,
2388 offsetof(struct sdpcmd_regs, intstatus));
2389
2390 err = r_sdreg32(bus, &newstatus,
2391 offsetof(struct sdpcmd_regs, intstatus));
2392 bus->sdcnt.f1regdata += 2;
2393 atomic_set(&bus->fcstate,
2394 !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)));
2395 intstatus |= (newstatus & bus->hostintmask);
2396 }
2397
2398 /* Handle host mailbox indication */
2399 if (intstatus & I_HMB_HOST_INT) {
2400 intstatus &= ~I_HMB_HOST_INT;
2401 intstatus |= brcmf_sdio_hostmail(bus);
2402 }
2403
2404 sdio_release_host(bus->sdiodev->func[1]);
2405
2406 /* Generally don't ask for these, can get CRC errors... */
2407 if (intstatus & I_WR_OOSYNC) {
2408 brcmf_err("Dongle reports WR_OOSYNC\n");
2409 intstatus &= ~I_WR_OOSYNC;
2410 }
2411
2412 if (intstatus & I_RD_OOSYNC) {
2413 brcmf_err("Dongle reports RD_OOSYNC\n");
2414 intstatus &= ~I_RD_OOSYNC;
2415 }
2416
2417 if (intstatus & I_SBINT) {
2418 brcmf_err("Dongle reports SBINT\n");
2419 intstatus &= ~I_SBINT;
2420 }
2421
2422 /* Would be active due to wake-wlan in gSPI */
2423 if (intstatus & I_CHIPACTIVE) {
2424 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2425 intstatus &= ~I_CHIPACTIVE;
2426 }
2427
2428 /* Ignore frame indications if rxskip is set */
2429 if (bus->rxskip)
2430 intstatus &= ~I_HMB_FRAME_IND;
2431
2432 /* On frame indication, read available frames */
2433 if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) {
2434 framecnt = brcmf_sdio_readframes(bus, rxlimit);
2435 if (!bus->rxpending)
2436 intstatus &= ~I_HMB_FRAME_IND;
2437 rxlimit -= min(framecnt, rxlimit);
2438 }
2439
2440 /* Keep still-pending events for next scheduling */
2441 if (intstatus) {
2442 for_each_set_bit(n, &intstatus, 32)
2443 set_bit(n, (unsigned long *)&bus->intstatus.counter);
2444 }
2445
2446 brcmf_sdio_clrintr(bus);
2447
2448 if (data_ok(bus) && bus->ctrl_frame_stat &&
2449 (bus->clkstate == CLK_AVAIL)) {
2450 int i;
2451
2452 sdio_claim_host(bus->sdiodev->func[1]);
2453 err = brcmf_sdiod_send_buf(bus->sdiodev, bus->ctrl_frame_buf,
2454 (u32)bus->ctrl_frame_len);
2455
2456 if (err < 0) {
2457 /* On failure, abort the command and
2458 terminate the frame */
2459 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2460 err);
2461 bus->sdcnt.tx_sderrs++;
2462
2463 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
2464
2465 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2466 SFC_WF_TERM, &err);
2467 bus->sdcnt.f1regdata++;
2468
2469 for (i = 0; i < 3; i++) {
2470 u8 hi, lo;
2471 hi = brcmf_sdiod_regrb(bus->sdiodev,
2472 SBSDIO_FUNC1_WFRAMEBCHI,
2473 &err);
2474 lo = brcmf_sdiod_regrb(bus->sdiodev,
2475 SBSDIO_FUNC1_WFRAMEBCLO,
2476 &err);
2477 bus->sdcnt.f1regdata += 2;
2478 if ((hi == 0) && (lo == 0))
2479 break;
2480 }
2481
2482 } else {
2483 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
2484 }
2485 sdio_release_host(bus->sdiodev->func[1]);
2486 bus->ctrl_frame_stat = false;
2487 brcmf_sdio_wait_event_wakeup(bus);
2488 }
2489 /* Send queued frames (limit 1 if rx may still be pending) */
2490 else if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
2491 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit
2492 && data_ok(bus)) {
2493 framecnt = bus->rxpending ? min(txlimit, bus->txminmax) :
2494 txlimit;
2495 framecnt = brcmf_sdio_sendfromq(bus, framecnt);
2496 txlimit -= framecnt;
2497 }
2498
2499 if (!brcmf_bus_ready(bus->sdiodev->bus_if) || (err != 0)) {
2500 brcmf_err("failed backplane access over SDIO, halting operation\n");
2501 atomic_set(&bus->intstatus, 0);
2502 } else if (atomic_read(&bus->intstatus) ||
2503 atomic_read(&bus->ipend) > 0 ||
2504 (!atomic_read(&bus->fcstate) &&
2505 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
2506 data_ok(bus)) || PKT_AVAILABLE()) {
2507 atomic_inc(&bus->dpc_tskcnt);
2508 }
2509
2510 /* If we're done for now, turn off clock request. */
2511 if ((bus->clkstate != CLK_PENDING)
2512 && bus->idletime == BRCMF_IDLE_IMMEDIATE) {
2513 bus->activity = false;
2514 brcmf_dbg(SDIO, "idle state\n");
2515 sdio_claim_host(bus->sdiodev->func[1]);
2516 brcmf_sdio_bus_sleep(bus, true, false);
2517 sdio_release_host(bus->sdiodev->func[1]);
2518 }
2519 }
2520
2521 static struct pktq *brcmf_sdio_bus_gettxq(struct device *dev)
2522 {
2523 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2524 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2525 struct brcmf_sdio *bus = sdiodev->bus;
2526
2527 return &bus->txq;
2528 }
2529
2530 static int brcmf_sdio_bus_txdata(struct device *dev, struct sk_buff *pkt)
2531 {
2532 int ret = -EBADE;
2533 uint datalen, prec;
2534 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2535 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2536 struct brcmf_sdio *bus = sdiodev->bus;
2537 ulong flags;
2538
2539 brcmf_dbg(TRACE, "Enter\n");
2540
2541 datalen = pkt->len;
2542
2543 /* Add space for the header */
2544 skb_push(pkt, bus->tx_hdrlen);
2545 /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2546
2547 prec = prio2prec((pkt->priority & PRIOMASK));
2548
2549 /* Check for existing queue, current flow-control,
2550 pending event, or pending clock */
2551 brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
2552 bus->sdcnt.fcqueued++;
2553
2554 /* Priority based enq */
2555 spin_lock_irqsave(&bus->txqlock, flags);
2556 if (!brcmf_c_prec_enq(bus->sdiodev->dev, &bus->txq, pkt, prec)) {
2557 skb_pull(pkt, bus->tx_hdrlen);
2558 brcmf_err("out of bus->txq !!!\n");
2559 ret = -ENOSR;
2560 } else {
2561 ret = 0;
2562 }
2563
2564 if (pktq_len(&bus->txq) >= TXHI) {
2565 bus->txoff = true;
2566 brcmf_txflowblock(bus->sdiodev->dev, true);
2567 }
2568 spin_unlock_irqrestore(&bus->txqlock, flags);
2569
2570 #ifdef DEBUG
2571 if (pktq_plen(&bus->txq, prec) > qcount[prec])
2572 qcount[prec] = pktq_plen(&bus->txq, prec);
2573 #endif
2574
2575 if (atomic_read(&bus->dpc_tskcnt) == 0) {
2576 atomic_inc(&bus->dpc_tskcnt);
2577 queue_work(bus->brcmf_wq, &bus->datawork);
2578 }
2579
2580 return ret;
2581 }
2582
2583 #ifdef DEBUG
2584 #define CONSOLE_LINE_MAX 192
2585
2586 static int brcmf_sdio_readconsole(struct brcmf_sdio *bus)
2587 {
2588 struct brcmf_console *c = &bus->console;
2589 u8 line[CONSOLE_LINE_MAX], ch;
2590 u32 n, idx, addr;
2591 int rv;
2592
2593 /* Don't do anything until FWREADY updates console address */
2594 if (bus->console_addr == 0)
2595 return 0;
2596
2597 /* Read console log struct */
2598 addr = bus->console_addr + offsetof(struct rte_console, log_le);
2599 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&c->log_le,
2600 sizeof(c->log_le));
2601 if (rv < 0)
2602 return rv;
2603
2604 /* Allocate console buffer (one time only) */
2605 if (c->buf == NULL) {
2606 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2607 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2608 if (c->buf == NULL)
2609 return -ENOMEM;
2610 }
2611
2612 idx = le32_to_cpu(c->log_le.idx);
2613
2614 /* Protect against corrupt value */
2615 if (idx > c->bufsize)
2616 return -EBADE;
2617
2618 /* Skip reading the console buffer if the index pointer
2619 has not moved */
2620 if (idx == c->last)
2621 return 0;
2622
2623 /* Read the console buffer */
2624 addr = le32_to_cpu(c->log_le.buf);
2625 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, c->buf, c->bufsize);
2626 if (rv < 0)
2627 return rv;
2628
2629 while (c->last != idx) {
2630 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2631 if (c->last == idx) {
2632 /* This would output a partial line.
2633 * Instead, back up
2634 * the buffer pointer and output this
2635 * line next time around.
2636 */
2637 if (c->last >= n)
2638 c->last -= n;
2639 else
2640 c->last = c->bufsize - n;
2641 goto break2;
2642 }
2643 ch = c->buf[c->last];
2644 c->last = (c->last + 1) % c->bufsize;
2645 if (ch == '\n')
2646 break;
2647 line[n] = ch;
2648 }
2649
2650 if (n > 0) {
2651 if (line[n - 1] == '\r')
2652 n--;
2653 line[n] = 0;
2654 pr_debug("CONSOLE: %s\n", line);
2655 }
2656 }
2657 break2:
2658
2659 return 0;
2660 }
2661 #endif /* DEBUG */
2662
2663 static int brcmf_sdio_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
2664 {
2665 int i;
2666 int ret;
2667
2668 bus->ctrl_frame_stat = false;
2669 ret = brcmf_sdiod_send_buf(bus->sdiodev, frame, len);
2670
2671 if (ret < 0) {
2672 /* On failure, abort the command and terminate the frame */
2673 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2674 ret);
2675 bus->sdcnt.tx_sderrs++;
2676
2677 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
2678
2679 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2680 SFC_WF_TERM, NULL);
2681 bus->sdcnt.f1regdata++;
2682
2683 for (i = 0; i < 3; i++) {
2684 u8 hi, lo;
2685 hi = brcmf_sdiod_regrb(bus->sdiodev,
2686 SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2687 lo = brcmf_sdiod_regrb(bus->sdiodev,
2688 SBSDIO_FUNC1_WFRAMEBCLO, NULL);
2689 bus->sdcnt.f1regdata += 2;
2690 if (hi == 0 && lo == 0)
2691 break;
2692 }
2693 return ret;
2694 }
2695
2696 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
2697
2698 return ret;
2699 }
2700
2701 static int
2702 brcmf_sdio_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
2703 {
2704 u8 *frame;
2705 u16 len, pad;
2706 uint retries = 0;
2707 u8 doff = 0;
2708 int ret = -1;
2709 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2710 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2711 struct brcmf_sdio *bus = sdiodev->bus;
2712 struct brcmf_sdio_hdrinfo hd_info = {0};
2713
2714 brcmf_dbg(TRACE, "Enter\n");
2715
2716 /* Back the pointer to make a room for bus header */
2717 frame = msg - bus->tx_hdrlen;
2718 len = (msglen += bus->tx_hdrlen);
2719
2720 /* Add alignment padding (optional for ctl frames) */
2721 doff = ((unsigned long)frame % bus->head_align);
2722 if (doff) {
2723 frame -= doff;
2724 len += doff;
2725 msglen += doff;
2726 memset(frame, 0, doff + bus->tx_hdrlen);
2727 }
2728 /* precondition: doff < bus->head_align */
2729 doff += bus->tx_hdrlen;
2730
2731 /* Round send length to next SDIO block */
2732 pad = 0;
2733 if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2734 pad = bus->blocksize - (len % bus->blocksize);
2735 if ((pad > bus->roundup) || (pad >= bus->blocksize))
2736 pad = 0;
2737 } else if (len % bus->head_align) {
2738 pad = bus->head_align - (len % bus->head_align);
2739 }
2740 len += pad;
2741
2742 /* precondition: IS_ALIGNED((unsigned long)frame, 2) */
2743
2744 /* Make sure backplane clock is on */
2745 sdio_claim_host(bus->sdiodev->func[1]);
2746 brcmf_sdio_bus_sleep(bus, false, false);
2747 sdio_release_host(bus->sdiodev->func[1]);
2748
2749 hd_info.len = (u16)msglen;
2750 hd_info.channel = SDPCM_CONTROL_CHANNEL;
2751 hd_info.dat_offset = doff;
2752 hd_info.seq_num = bus->tx_seq;
2753 hd_info.lastfrm = true;
2754 hd_info.tail_pad = pad;
2755 brcmf_sdio_hdpack(bus, frame, &hd_info);
2756
2757 if (bus->txglom)
2758 brcmf_sdio_update_hwhdr(frame, len);
2759
2760 if (!data_ok(bus)) {
2761 brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
2762 bus->tx_max, bus->tx_seq);
2763 bus->ctrl_frame_stat = true;
2764 /* Send from dpc */
2765 bus->ctrl_frame_buf = frame;
2766 bus->ctrl_frame_len = len;
2767
2768 wait_event_interruptible_timeout(bus->ctrl_wait,
2769 !bus->ctrl_frame_stat,
2770 msecs_to_jiffies(2000));
2771
2772 if (!bus->ctrl_frame_stat) {
2773 brcmf_dbg(SDIO, "ctrl_frame_stat == false\n");
2774 ret = 0;
2775 } else {
2776 brcmf_dbg(SDIO, "ctrl_frame_stat == true\n");
2777 ret = -1;
2778 }
2779 }
2780
2781 if (ret == -1) {
2782 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
2783 frame, len, "Tx Frame:\n");
2784 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
2785 BRCMF_HDRS_ON(),
2786 frame, min_t(u16, len, 16), "TxHdr:\n");
2787
2788 do {
2789 sdio_claim_host(bus->sdiodev->func[1]);
2790 ret = brcmf_sdio_tx_frame(bus, frame, len);
2791 sdio_release_host(bus->sdiodev->func[1]);
2792 } while (ret < 0 && retries++ < TXRETRIES);
2793 }
2794
2795 if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) &&
2796 atomic_read(&bus->dpc_tskcnt) == 0) {
2797 bus->activity = false;
2798 sdio_claim_host(bus->sdiodev->func[1]);
2799 brcmf_dbg(INFO, "idle\n");
2800 brcmf_sdio_clkctl(bus, CLK_NONE, true);
2801 sdio_release_host(bus->sdiodev->func[1]);
2802 }
2803
2804 if (ret)
2805 bus->sdcnt.tx_ctlerrs++;
2806 else
2807 bus->sdcnt.tx_ctlpkts++;
2808
2809 return ret ? -EIO : 0;
2810 }
2811
2812 #ifdef DEBUG
2813 static inline bool brcmf_sdio_valid_shared_address(u32 addr)
2814 {
2815 return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
2816 }
2817
2818 static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
2819 struct sdpcm_shared *sh)
2820 {
2821 u32 addr;
2822 int rv;
2823 u32 shaddr = 0;
2824 struct sdpcm_shared_le sh_le;
2825 __le32 addr_le;
2826
2827 shaddr = bus->ci->rambase + bus->ramsize - 4;
2828
2829 /*
2830 * Read last word in socram to determine
2831 * address of sdpcm_shared structure
2832 */
2833 sdio_claim_host(bus->sdiodev->func[1]);
2834 brcmf_sdio_bus_sleep(bus, false, false);
2835 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, shaddr, (u8 *)&addr_le, 4);
2836 sdio_release_host(bus->sdiodev->func[1]);
2837 if (rv < 0)
2838 return rv;
2839
2840 addr = le32_to_cpu(addr_le);
2841
2842 brcmf_dbg(SDIO, "sdpcm_shared address 0x%08X\n", addr);
2843
2844 /*
2845 * Check if addr is valid.
2846 * NVRAM length at the end of memory should have been overwritten.
2847 */
2848 if (!brcmf_sdio_valid_shared_address(addr)) {
2849 brcmf_err("invalid sdpcm_shared address 0x%08X\n",
2850 addr);
2851 return -EINVAL;
2852 }
2853
2854 /* Read hndrte_shared structure */
2855 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&sh_le,
2856 sizeof(struct sdpcm_shared_le));
2857 if (rv < 0)
2858 return rv;
2859
2860 /* Endianness */
2861 sh->flags = le32_to_cpu(sh_le.flags);
2862 sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
2863 sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
2864 sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
2865 sh->assert_line = le32_to_cpu(sh_le.assert_line);
2866 sh->console_addr = le32_to_cpu(sh_le.console_addr);
2867 sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
2868
2869 if ((sh->flags & SDPCM_SHARED_VERSION_MASK) > SDPCM_SHARED_VERSION) {
2870 brcmf_err("sdpcm shared version unsupported: dhd %d dongle %d\n",
2871 SDPCM_SHARED_VERSION,
2872 sh->flags & SDPCM_SHARED_VERSION_MASK);
2873 return -EPROTO;
2874 }
2875
2876 return 0;
2877 }
2878
2879 static int brcmf_sdio_dump_console(struct brcmf_sdio *bus,
2880 struct sdpcm_shared *sh, char __user *data,
2881 size_t count)
2882 {
2883 u32 addr, console_ptr, console_size, console_index;
2884 char *conbuf = NULL;
2885 __le32 sh_val;
2886 int rv;
2887 loff_t pos = 0;
2888 int nbytes = 0;
2889
2890 /* obtain console information from device memory */
2891 addr = sh->console_addr + offsetof(struct rte_console, log_le);
2892 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2893 (u8 *)&sh_val, sizeof(u32));
2894 if (rv < 0)
2895 return rv;
2896 console_ptr = le32_to_cpu(sh_val);
2897
2898 addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
2899 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2900 (u8 *)&sh_val, sizeof(u32));
2901 if (rv < 0)
2902 return rv;
2903 console_size = le32_to_cpu(sh_val);
2904
2905 addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
2906 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2907 (u8 *)&sh_val, sizeof(u32));
2908 if (rv < 0)
2909 return rv;
2910 console_index = le32_to_cpu(sh_val);
2911
2912 /* allocate buffer for console data */
2913 if (console_size <= CONSOLE_BUFFER_MAX)
2914 conbuf = vzalloc(console_size+1);
2915
2916 if (!conbuf)
2917 return -ENOMEM;
2918
2919 /* obtain the console data from device */
2920 conbuf[console_size] = '\0';
2921 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, console_ptr, (u8 *)conbuf,
2922 console_size);
2923 if (rv < 0)
2924 goto done;
2925
2926 rv = simple_read_from_buffer(data, count, &pos,
2927 conbuf + console_index,
2928 console_size - console_index);
2929 if (rv < 0)
2930 goto done;
2931
2932 nbytes = rv;
2933 if (console_index > 0) {
2934 pos = 0;
2935 rv = simple_read_from_buffer(data+nbytes, count, &pos,
2936 conbuf, console_index - 1);
2937 if (rv < 0)
2938 goto done;
2939 rv += nbytes;
2940 }
2941 done:
2942 vfree(conbuf);
2943 return rv;
2944 }
2945
2946 static int brcmf_sdio_trap_info(struct brcmf_sdio *bus, struct sdpcm_shared *sh,
2947 char __user *data, size_t count)
2948 {
2949 int error, res;
2950 char buf[350];
2951 struct brcmf_trap_info tr;
2952 loff_t pos = 0;
2953
2954 if ((sh->flags & SDPCM_SHARED_TRAP) == 0) {
2955 brcmf_dbg(INFO, "no trap in firmware\n");
2956 return 0;
2957 }
2958
2959 error = brcmf_sdiod_ramrw(bus->sdiodev, false, sh->trap_addr, (u8 *)&tr,
2960 sizeof(struct brcmf_trap_info));
2961 if (error < 0)
2962 return error;
2963
2964 res = scnprintf(buf, sizeof(buf),
2965 "dongle trap info: type 0x%x @ epc 0x%08x\n"
2966 " cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
2967 " lr 0x%08x pc 0x%08x offset 0x%x\n"
2968 " r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n"
2969 " r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n",
2970 le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
2971 le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
2972 le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
2973 le32_to_cpu(tr.pc), sh->trap_addr,
2974 le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
2975 le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
2976 le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
2977 le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));
2978
2979 return simple_read_from_buffer(data, count, &pos, buf, res);
2980 }
2981
2982 static int brcmf_sdio_assert_info(struct brcmf_sdio *bus,
2983 struct sdpcm_shared *sh, char __user *data,
2984 size_t count)
2985 {
2986 int error = 0;
2987 char buf[200];
2988 char file[80] = "?";
2989 char expr[80] = "<???>";
2990 int res;
2991 loff_t pos = 0;
2992
2993 if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
2994 brcmf_dbg(INFO, "firmware not built with -assert\n");
2995 return 0;
2996 } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
2997 brcmf_dbg(INFO, "no assert in dongle\n");
2998 return 0;
2999 }
3000
3001 sdio_claim_host(bus->sdiodev->func[1]);
3002 if (sh->assert_file_addr != 0) {
3003 error = brcmf_sdiod_ramrw(bus->sdiodev, false,
3004 sh->assert_file_addr, (u8 *)file, 80);
3005 if (error < 0)
3006 return error;
3007 }
3008 if (sh->assert_exp_addr != 0) {
3009 error = brcmf_sdiod_ramrw(bus->sdiodev, false,
3010 sh->assert_exp_addr, (u8 *)expr, 80);
3011 if (error < 0)
3012 return error;
3013 }
3014 sdio_release_host(bus->sdiodev->func[1]);
3015
3016 res = scnprintf(buf, sizeof(buf),
3017 "dongle assert: %s:%d: assert(%s)\n",
3018 file, sh->assert_line, expr);
3019 return simple_read_from_buffer(data, count, &pos, buf, res);
3020 }
3021
3022 static int brcmf_sdio_checkdied(struct brcmf_sdio *bus)
3023 {
3024 int error;
3025 struct sdpcm_shared sh;
3026
3027 error = brcmf_sdio_readshared(bus, &sh);
3028
3029 if (error < 0)
3030 return error;
3031
3032 if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
3033 brcmf_dbg(INFO, "firmware not built with -assert\n");
3034 else if (sh.flags & SDPCM_SHARED_ASSERT)
3035 brcmf_err("assertion in dongle\n");
3036
3037 if (sh.flags & SDPCM_SHARED_TRAP)
3038 brcmf_err("firmware trap in dongle\n");
3039
3040 return 0;
3041 }
3042
3043 static int brcmf_sdio_died_dump(struct brcmf_sdio *bus, char __user *data,
3044 size_t count, loff_t *ppos)
3045 {
3046 int error = 0;
3047 struct sdpcm_shared sh;
3048 int nbytes = 0;
3049 loff_t pos = *ppos;
3050
3051 if (pos != 0)
3052 return 0;
3053
3054 error = brcmf_sdio_readshared(bus, &sh);
3055 if (error < 0)
3056 goto done;
3057
3058 error = brcmf_sdio_assert_info(bus, &sh, data, count);
3059 if (error < 0)
3060 goto done;
3061 nbytes = error;
3062
3063 error = brcmf_sdio_trap_info(bus, &sh, data+nbytes, count);
3064 if (error < 0)
3065 goto done;
3066 nbytes += error;
3067
3068 error = brcmf_sdio_dump_console(bus, &sh, data+nbytes, count);
3069 if (error < 0)
3070 goto done;
3071 nbytes += error;
3072
3073 error = nbytes;
3074 *ppos += nbytes;
3075 done:
3076 return error;
3077 }
3078
3079 static ssize_t brcmf_sdio_forensic_read(struct file *f, char __user *data,
3080 size_t count, loff_t *ppos)
3081 {
3082 struct brcmf_sdio *bus = f->private_data;
3083 int res;
3084
3085 res = brcmf_sdio_died_dump(bus, data, count, ppos);
3086 if (res > 0)
3087 *ppos += res;
3088 return (ssize_t)res;
3089 }
3090
3091 static const struct file_operations brcmf_sdio_forensic_ops = {
3092 .owner = THIS_MODULE,
3093 .open = simple_open,
3094 .read = brcmf_sdio_forensic_read
3095 };
3096
3097 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3098 {
3099 struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
3100 struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);
3101
3102 if (IS_ERR_OR_NULL(dentry))
3103 return;
3104
3105 debugfs_create_file("forensics", S_IRUGO, dentry, bus,
3106 &brcmf_sdio_forensic_ops);
3107 brcmf_debugfs_create_sdio_count(drvr, &bus->sdcnt);
3108 }
3109 #else
3110 static int brcmf_sdio_checkdied(struct brcmf_sdio *bus)
3111 {
3112 return 0;
3113 }
3114
3115 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3116 {
3117 }
3118 #endif /* DEBUG */
3119
3120 static int
3121 brcmf_sdio_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
3122 {
3123 int timeleft;
3124 uint rxlen = 0;
3125 bool pending;
3126 u8 *buf;
3127 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3128 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3129 struct brcmf_sdio *bus = sdiodev->bus;
3130
3131 brcmf_dbg(TRACE, "Enter\n");
3132
3133 /* Wait until control frame is available */
3134 timeleft = brcmf_sdio_dcmd_resp_wait(bus, &bus->rxlen, &pending);
3135
3136 spin_lock_bh(&bus->rxctl_lock);
3137 rxlen = bus->rxlen;
3138 memcpy(msg, bus->rxctl, min(msglen, rxlen));
3139 bus->rxctl = NULL;
3140 buf = bus->rxctl_orig;
3141 bus->rxctl_orig = NULL;
3142 bus->rxlen = 0;
3143 spin_unlock_bh(&bus->rxctl_lock);
3144 vfree(buf);
3145
3146 if (rxlen) {
3147 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
3148 rxlen, msglen);
3149 } else if (timeleft == 0) {
3150 brcmf_err("resumed on timeout\n");
3151 brcmf_sdio_checkdied(bus);
3152 } else if (pending) {
3153 brcmf_dbg(CTL, "cancelled\n");
3154 return -ERESTARTSYS;
3155 } else {
3156 brcmf_dbg(CTL, "resumed for unknown reason?\n");
3157 brcmf_sdio_checkdied(bus);
3158 }
3159
3160 if (rxlen)
3161 bus->sdcnt.rx_ctlpkts++;
3162 else
3163 bus->sdcnt.rx_ctlerrs++;
3164
3165 return rxlen ? (int)rxlen : -ETIMEDOUT;
3166 }
3167
3168 #ifdef DEBUG
3169 static bool
3170 brcmf_sdio_verifymemory(struct brcmf_sdio_dev *sdiodev, u32 ram_addr,
3171 u8 *ram_data, uint ram_sz)
3172 {
3173 char *ram_cmp;
3174 int err;
3175 bool ret = true;
3176 int address;
3177 int offset;
3178 int len;
3179
3180 /* read back and verify */
3181 brcmf_dbg(INFO, "Compare RAM dl & ul at 0x%08x; size=%d\n", ram_addr,
3182 ram_sz);
3183 ram_cmp = kmalloc(MEMBLOCK, GFP_KERNEL);
3184 /* do not proceed while no memory but */
3185 if (!ram_cmp)
3186 return true;
3187
3188 address = ram_addr;
3189 offset = 0;
3190 while (offset < ram_sz) {
3191 len = ((offset + MEMBLOCK) < ram_sz) ? MEMBLOCK :
3192 ram_sz - offset;
3193 err = brcmf_sdiod_ramrw(sdiodev, false, address, ram_cmp, len);
3194 if (err) {
3195 brcmf_err("error %d on reading %d membytes at 0x%08x\n",
3196 err, len, address);
3197 ret = false;
3198 break;
3199 } else if (memcmp(ram_cmp, &ram_data[offset], len)) {
3200 brcmf_err("Downloaded RAM image is corrupted, block offset is %d, len is %d\n",
3201 offset, len);
3202 ret = false;
3203 break;
3204 }
3205 offset += len;
3206 address += len;
3207 }
3208
3209 kfree(ram_cmp);
3210
3211 return ret;
3212 }
3213 #else /* DEBUG */
3214 static bool
3215 brcmf_sdio_verifymemory(struct brcmf_sdio_dev *sdiodev, u32 ram_addr,
3216 u8 *ram_data, uint ram_sz)
3217 {
3218 return true;
3219 }
3220 #endif /* DEBUG */
3221
3222 static int brcmf_sdio_download_code_file(struct brcmf_sdio *bus,
3223 const struct firmware *fw)
3224 {
3225 int err;
3226 int offset;
3227 int address;
3228 int len;
3229
3230 brcmf_dbg(TRACE, "Enter\n");
3231
3232 err = 0;
3233 offset = 0;
3234 address = bus->ci->rambase;
3235 while (offset < fw->size) {
3236 len = ((offset + MEMBLOCK) < fw->size) ? MEMBLOCK :
3237 fw->size - offset;
3238 err = brcmf_sdiod_ramrw(bus->sdiodev, true, address,
3239 (u8 *)&fw->data[offset], len);
3240 if (err) {
3241 brcmf_err("error %d on writing %d membytes at 0x%08x\n",
3242 err, len, address);
3243 return err;
3244 }
3245 offset += len;
3246 address += len;
3247 }
3248 if (!err)
3249 if (!brcmf_sdio_verifymemory(bus->sdiodev, bus->ci->rambase,
3250 (u8 *)fw->data, fw->size))
3251 err = -EIO;
3252
3253 return err;
3254 }
3255
3256 static int brcmf_sdio_download_nvram(struct brcmf_sdio *bus,
3257 const struct firmware *nv)
3258 {
3259 void *vars;
3260 u32 varsz;
3261 int address;
3262 int err;
3263
3264 brcmf_dbg(TRACE, "Enter\n");
3265
3266 vars = brcmf_nvram_strip(nv, &varsz);
3267
3268 if (vars == NULL)
3269 return -EINVAL;
3270
3271 address = bus->ci->ramsize - varsz + bus->ci->rambase;
3272 err = brcmf_sdiod_ramrw(bus->sdiodev, true, address, vars, varsz);
3273 if (err)
3274 brcmf_err("error %d on writing %d nvram bytes at 0x%08x\n",
3275 err, varsz, address);
3276 else if (!brcmf_sdio_verifymemory(bus->sdiodev, address, vars, varsz))
3277 err = -EIO;
3278
3279 brcmf_nvram_free(vars);
3280
3281 return err;
3282 }
3283
3284 static int brcmf_sdio_download_firmware(struct brcmf_sdio *bus)
3285 {
3286 int bcmerror = -EFAULT;
3287 const struct firmware *fw;
3288 u32 rstvec;
3289
3290 sdio_claim_host(bus->sdiodev->func[1]);
3291 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
3292
3293 /* Keep arm in reset */
3294 brcmf_sdio_chip_enter_download(bus->sdiodev, bus->ci);
3295
3296 fw = brcmf_sdio_get_fw(bus, BRCMF_FIRMWARE_BIN);
3297 if (fw == NULL) {
3298 bcmerror = -ENOENT;
3299 goto err;
3300 }
3301
3302 rstvec = get_unaligned_le32(fw->data);
3303 brcmf_dbg(SDIO, "firmware rstvec: %x\n", rstvec);
3304
3305 bcmerror = brcmf_sdio_download_code_file(bus, fw);
3306 release_firmware(fw);
3307 if (bcmerror) {
3308 brcmf_err("dongle image file download failed\n");
3309 goto err;
3310 }
3311
3312 fw = brcmf_sdio_get_fw(bus, BRCMF_FIRMWARE_NVRAM);
3313 if (fw == NULL) {
3314 bcmerror = -ENOENT;
3315 goto err;
3316 }
3317
3318 bcmerror = brcmf_sdio_download_nvram(bus, fw);
3319 release_firmware(fw);
3320 if (bcmerror) {
3321 brcmf_err("dongle nvram file download failed\n");
3322 goto err;
3323 }
3324
3325 /* Take arm out of reset */
3326 if (!brcmf_sdio_chip_exit_download(bus->sdiodev, bus->ci, rstvec)) {
3327 brcmf_err("error getting out of ARM core reset\n");
3328 goto err;
3329 }
3330
3331 /* Allow HT Clock now that the ARM is running. */
3332 brcmf_bus_change_state(bus->sdiodev->bus_if, BRCMF_BUS_LOAD);
3333 bcmerror = 0;
3334
3335 err:
3336 brcmf_sdio_clkctl(bus, CLK_SDONLY, false);
3337 sdio_release_host(bus->sdiodev->func[1]);
3338 return bcmerror;
3339 }
3340
3341 static bool brcmf_sdio_sr_capable(struct brcmf_sdio *bus)
3342 {
3343 u32 addr, reg, pmu_cc3_mask = ~0;
3344 int err;
3345
3346 brcmf_dbg(TRACE, "Enter\n");
3347
3348 /* old chips with PMU version less than 17 don't support save restore */
3349 if (bus->ci->pmurev < 17)
3350 return false;
3351
3352 switch (bus->ci->chip) {
3353 case BCM43241_CHIP_ID:
3354 case BCM4335_CHIP_ID:
3355 case BCM4339_CHIP_ID:
3356 /* read PMU chipcontrol register 3 */
3357 addr = CORE_CC_REG(bus->ci->c_inf[0].base, chipcontrol_addr);
3358 brcmf_sdiod_regwl(bus->sdiodev, addr, 3, NULL);
3359 addr = CORE_CC_REG(bus->ci->c_inf[0].base, chipcontrol_data);
3360 reg = brcmf_sdiod_regrl(bus->sdiodev, addr, NULL);
3361 return (reg & pmu_cc3_mask) != 0;
3362 default:
3363 addr = CORE_CC_REG(bus->ci->c_inf[0].base, pmucapabilities_ext);
3364 reg = brcmf_sdiod_regrl(bus->sdiodev, addr, &err);
3365 if ((reg & PCAPEXT_SR_SUPPORTED_MASK) == 0)
3366 return false;
3367
3368 addr = CORE_CC_REG(bus->ci->c_inf[0].base, retention_ctl);
3369 reg = brcmf_sdiod_regrl(bus->sdiodev, addr, NULL);
3370 return (reg & (PMU_RCTL_MACPHY_DISABLE_MASK |
3371 PMU_RCTL_LOGIC_DISABLE_MASK)) == 0;
3372 }
3373 }
3374
3375 static void brcmf_sdio_sr_init(struct brcmf_sdio *bus)
3376 {
3377 int err = 0;
3378 u8 val;
3379
3380 brcmf_dbg(TRACE, "Enter\n");
3381
3382 val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, &err);
3383 if (err) {
3384 brcmf_err("error reading SBSDIO_FUNC1_WAKEUPCTRL\n");
3385 return;
3386 }
3387
3388 val |= 1 << SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT;
3389 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, val, &err);
3390 if (err) {
3391 brcmf_err("error writing SBSDIO_FUNC1_WAKEUPCTRL\n");
3392 return;
3393 }
3394
3395 /* Add CMD14 Support */
3396 brcmf_sdiod_regwb(bus->sdiodev, SDIO_CCCR_BRCM_CARDCAP,
3397 (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT |
3398 SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT),
3399 &err);
3400 if (err) {
3401 brcmf_err("error writing SDIO_CCCR_BRCM_CARDCAP\n");
3402 return;
3403 }
3404
3405 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3406 SBSDIO_FORCE_HT, &err);
3407 if (err) {
3408 brcmf_err("error writing SBSDIO_FUNC1_CHIPCLKCSR\n");
3409 return;
3410 }
3411
3412 /* set flag */
3413 bus->sr_enabled = true;
3414 brcmf_dbg(INFO, "SR enabled\n");
3415 }
3416
3417 /* enable KSO bit */
3418 static int brcmf_sdio_kso_init(struct brcmf_sdio *bus)
3419 {
3420 u8 val;
3421 int err = 0;
3422
3423 brcmf_dbg(TRACE, "Enter\n");
3424
3425 /* KSO bit added in SDIO core rev 12 */
3426 if (bus->ci->c_inf[1].rev < 12)
3427 return 0;
3428
3429 val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, &err);
3430 if (err) {
3431 brcmf_err("error reading SBSDIO_FUNC1_SLEEPCSR\n");
3432 return err;
3433 }
3434
3435 if (!(val & SBSDIO_FUNC1_SLEEPCSR_KSO_MASK)) {
3436 val |= (SBSDIO_FUNC1_SLEEPCSR_KSO_EN <<
3437 SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
3438 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
3439 val, &err);
3440 if (err) {
3441 brcmf_err("error writing SBSDIO_FUNC1_SLEEPCSR\n");
3442 return err;
3443 }
3444 }
3445
3446 return 0;
3447 }
3448
3449
3450 static int brcmf_sdio_bus_preinit(struct device *dev)
3451 {
3452 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3453 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3454 struct brcmf_sdio *bus = sdiodev->bus;
3455 uint pad_size;
3456 u32 value;
3457 u8 idx;
3458 int err;
3459
3460 /* the commands below use the terms tx and rx from
3461 * a device perspective, ie. bus:txglom affects the
3462 * bus transfers from device to host.
3463 */
3464 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
3465 if (bus->ci->c_inf[idx].rev < 12) {
3466 /* for sdio core rev < 12, disable txgloming */
3467 value = 0;
3468 err = brcmf_iovar_data_set(dev, "bus:txglom", &value,
3469 sizeof(u32));
3470 } else {
3471 /* otherwise, set txglomalign */
3472 value = 4;
3473 if (sdiodev->pdata)
3474 value = sdiodev->pdata->sd_sgentry_align;
3475 /* SDIO ADMA requires at least 32 bit alignment */
3476 value = max_t(u32, value, 4);
3477 err = brcmf_iovar_data_set(dev, "bus:txglomalign", &value,
3478 sizeof(u32));
3479 }
3480
3481 if (err < 0)
3482 goto done;
3483
3484 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
3485 if (sdiodev->sg_support) {
3486 bus->txglom = false;
3487 value = 1;
3488 pad_size = bus->sdiodev->func[2]->cur_blksize << 1;
3489 bus->txglom_sgpad = brcmu_pkt_buf_get_skb(pad_size);
3490 if (!bus->txglom_sgpad)
3491 brcmf_err("allocating txglom padding skb failed, reduced performance\n");
3492
3493 err = brcmf_iovar_data_set(bus->sdiodev->dev, "bus:rxglom",
3494 &value, sizeof(u32));
3495 if (err < 0) {
3496 /* bus:rxglom is allowed to fail */
3497 err = 0;
3498 } else {
3499 bus->txglom = true;
3500 bus->tx_hdrlen += SDPCM_HWEXT_LEN;
3501 }
3502 }
3503 brcmf_bus_add_txhdrlen(bus->sdiodev->dev, bus->tx_hdrlen);
3504
3505 done:
3506 return err;
3507 }
3508
3509 static int brcmf_sdio_bus_init(struct device *dev)
3510 {
3511 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3512 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3513 struct brcmf_sdio *bus = sdiodev->bus;
3514 int err, ret = 0;
3515 u8 saveclk;
3516
3517 brcmf_dbg(TRACE, "Enter\n");
3518
3519 /* try to download image and nvram to the dongle */
3520 if (bus_if->state == BRCMF_BUS_DOWN) {
3521 bus->alp_only = true;
3522 err = brcmf_sdio_download_firmware(bus);
3523 if (err)
3524 return err;
3525 bus->alp_only = false;
3526 }
3527
3528 if (!bus->sdiodev->bus_if->drvr)
3529 return 0;
3530
3531 /* Start the watchdog timer */
3532 bus->sdcnt.tickcnt = 0;
3533 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
3534
3535 sdio_claim_host(bus->sdiodev->func[1]);
3536
3537 /* Make sure backplane clock is on, needed to generate F2 interrupt */
3538 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
3539 if (bus->clkstate != CLK_AVAIL)
3540 goto exit;
3541
3542 /* Force clocks on backplane to be sure F2 interrupt propagates */
3543 saveclk = brcmf_sdiod_regrb(bus->sdiodev,
3544 SBSDIO_FUNC1_CHIPCLKCSR, &err);
3545 if (!err) {
3546 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3547 (saveclk | SBSDIO_FORCE_HT), &err);
3548 }
3549 if (err) {
3550 brcmf_err("Failed to force clock for F2: err %d\n", err);
3551 goto exit;
3552 }
3553
3554 /* Enable function 2 (frame transfers) */
3555 w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
3556 offsetof(struct sdpcmd_regs, tosbmailboxdata));
3557 err = sdio_enable_func(bus->sdiodev->func[SDIO_FUNC_2]);
3558
3559
3560 brcmf_dbg(INFO, "enable F2: err=%d\n", err);
3561
3562 /* If F2 successfully enabled, set core and enable interrupts */
3563 if (!err) {
3564 /* Set up the interrupt mask and enable interrupts */
3565 bus->hostintmask = HOSTINTMASK;
3566 w_sdreg32(bus, bus->hostintmask,
3567 offsetof(struct sdpcmd_regs, hostintmask));
3568
3569 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_WATERMARK, 8, &err);
3570 } else {
3571 /* Disable F2 again */
3572 sdio_disable_func(bus->sdiodev->func[SDIO_FUNC_2]);
3573 ret = -ENODEV;
3574 }
3575
3576 if (brcmf_sdio_sr_capable(bus)) {
3577 brcmf_sdio_sr_init(bus);
3578 } else {
3579 /* Restore previous clock setting */
3580 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3581 saveclk, &err);
3582 }
3583
3584 if (ret == 0) {
3585 ret = brcmf_sdiod_intr_register(bus->sdiodev);
3586 if (ret != 0)
3587 brcmf_err("intr register failed:%d\n", ret);
3588 }
3589
3590 /* If we didn't come up, turn off backplane clock */
3591 if (ret != 0)
3592 brcmf_sdio_clkctl(bus, CLK_NONE, false);
3593
3594 exit:
3595 sdio_release_host(bus->sdiodev->func[1]);
3596
3597 return ret;
3598 }
3599
3600 void brcmf_sdio_isr(struct brcmf_sdio *bus)
3601 {
3602 brcmf_dbg(TRACE, "Enter\n");
3603
3604 if (!bus) {
3605 brcmf_err("bus is null pointer, exiting\n");
3606 return;
3607 }
3608
3609 if (!brcmf_bus_ready(bus->sdiodev->bus_if)) {
3610 brcmf_err("bus is down. we have nothing to do\n");
3611 return;
3612 }
3613 /* Count the interrupt call */
3614 bus->sdcnt.intrcount++;
3615 if (in_interrupt())
3616 atomic_set(&bus->ipend, 1);
3617 else
3618 if (brcmf_sdio_intr_rstatus(bus)) {
3619 brcmf_err("failed backplane access\n");
3620 }
3621
3622 /* Disable additional interrupts (is this needed now)? */
3623 if (!bus->intr)
3624 brcmf_err("isr w/o interrupt configured!\n");
3625
3626 atomic_inc(&bus->dpc_tskcnt);
3627 queue_work(bus->brcmf_wq, &bus->datawork);
3628 }
3629
3630 static bool brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus)
3631 {
3632 #ifdef DEBUG
3633 struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev);
3634 #endif /* DEBUG */
3635
3636 brcmf_dbg(TIMER, "Enter\n");
3637
3638 /* Poll period: check device if appropriate. */
3639 if (!bus->sr_enabled &&
3640 bus->poll && (++bus->polltick >= bus->pollrate)) {
3641 u32 intstatus = 0;
3642
3643 /* Reset poll tick */
3644 bus->polltick = 0;
3645
3646 /* Check device if no interrupts */
3647 if (!bus->intr ||
3648 (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {
3649
3650 if (atomic_read(&bus->dpc_tskcnt) == 0) {
3651 u8 devpend;
3652
3653 sdio_claim_host(bus->sdiodev->func[1]);
3654 devpend = brcmf_sdiod_regrb(bus->sdiodev,
3655 SDIO_CCCR_INTx,
3656 NULL);
3657 sdio_release_host(bus->sdiodev->func[1]);
3658 intstatus =
3659 devpend & (INTR_STATUS_FUNC1 |
3660 INTR_STATUS_FUNC2);
3661 }
3662
3663 /* If there is something, make like the ISR and
3664 schedule the DPC */
3665 if (intstatus) {
3666 bus->sdcnt.pollcnt++;
3667 atomic_set(&bus->ipend, 1);
3668
3669 atomic_inc(&bus->dpc_tskcnt);
3670 queue_work(bus->brcmf_wq, &bus->datawork);
3671 }
3672 }
3673
3674 /* Update interrupt tracking */
3675 bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
3676 }
3677 #ifdef DEBUG
3678 /* Poll for console output periodically */
3679 if (bus_if && bus_if->state == BRCMF_BUS_DATA &&
3680 bus->console_interval != 0) {
3681 bus->console.count += BRCMF_WD_POLL_MS;
3682 if (bus->console.count >= bus->console_interval) {
3683 bus->console.count -= bus->console_interval;
3684 sdio_claim_host(bus->sdiodev->func[1]);
3685 /* Make sure backplane clock is on */
3686 brcmf_sdio_bus_sleep(bus, false, false);
3687 if (brcmf_sdio_readconsole(bus) < 0)
3688 /* stop on error */
3689 bus->console_interval = 0;
3690 sdio_release_host(bus->sdiodev->func[1]);
3691 }
3692 }
3693 #endif /* DEBUG */
3694
3695 /* On idle timeout clear activity flag and/or turn off clock */
3696 if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
3697 if (++bus->idlecount >= bus->idletime) {
3698 bus->idlecount = 0;
3699 if (bus->activity) {
3700 bus->activity = false;
3701 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
3702 } else {
3703 brcmf_dbg(SDIO, "idle\n");
3704 sdio_claim_host(bus->sdiodev->func[1]);
3705 brcmf_sdio_bus_sleep(bus, true, false);
3706 sdio_release_host(bus->sdiodev->func[1]);
3707 }
3708 }
3709 }
3710
3711 return (atomic_read(&bus->ipend) > 0);
3712 }
3713
3714 static void brcmf_sdio_dataworker(struct work_struct *work)
3715 {
3716 struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
3717 datawork);
3718
3719 while (atomic_read(&bus->dpc_tskcnt)) {
3720 brcmf_sdio_dpc(bus);
3721 atomic_dec(&bus->dpc_tskcnt);
3722 }
3723 }
3724
3725 static bool
3726 brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
3727 {
3728 u8 clkctl = 0;
3729 int err = 0;
3730 int reg_addr;
3731 u32 reg_val;
3732 u32 drivestrength;
3733
3734 sdio_claim_host(bus->sdiodev->func[1]);
3735
3736 pr_debug("F1 signature read @0x18000000=0x%4x\n",
3737 brcmf_sdiod_regrl(bus->sdiodev, SI_ENUM_BASE, NULL));
3738
3739 /*
3740 * Force PLL off until brcmf_sdio_chip_attach()
3741 * programs PLL control regs
3742 */
3743
3744 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3745 BRCMF_INIT_CLKCTL1, &err);
3746 if (!err)
3747 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
3748 SBSDIO_FUNC1_CHIPCLKCSR, &err);
3749
3750 if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3751 brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3752 err, BRCMF_INIT_CLKCTL1, clkctl);
3753 goto fail;
3754 }
3755
3756 /* SDIO register access works so moving
3757 * state from UNKNOWN to DOWN.
3758 */
3759 brcmf_bus_change_state(bus->sdiodev->bus_if, BRCMF_BUS_DOWN);
3760
3761 if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci)) {
3762 brcmf_err("brcmf_sdio_chip_attach failed!\n");
3763 goto fail;
3764 }
3765
3766 if (brcmf_sdio_kso_init(bus)) {
3767 brcmf_err("error enabling KSO\n");
3768 goto fail;
3769 }
3770
3771 if ((bus->sdiodev->pdata) && (bus->sdiodev->pdata->drive_strength))
3772 drivestrength = bus->sdiodev->pdata->drive_strength;
3773 else
3774 drivestrength = DEFAULT_SDIO_DRIVE_STRENGTH;
3775 brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci, drivestrength);
3776
3777 /* Get info on the SOCRAM cores... */
3778 bus->ramsize = bus->ci->ramsize;
3779 if (!(bus->ramsize)) {
3780 brcmf_err("failed to find SOCRAM memory!\n");
3781 goto fail;
3782 }
3783
3784 /* Set card control so an SDIO card reset does a WLAN backplane reset */
3785 reg_val = brcmf_sdiod_regrb(bus->sdiodev,
3786 SDIO_CCCR_BRCM_CARDCTRL, &err);
3787 if (err)
3788 goto fail;
3789
3790 reg_val |= SDIO_CCCR_BRCM_CARDCTRL_WLANRESET;
3791
3792 brcmf_sdiod_regwb(bus->sdiodev,
3793 SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err);
3794 if (err)
3795 goto fail;
3796
3797 /* set PMUControl so a backplane reset does PMU state reload */
3798 reg_addr = CORE_CC_REG(bus->ci->c_inf[0].base,
3799 pmucontrol);
3800 reg_val = brcmf_sdiod_regrl(bus->sdiodev,
3801 reg_addr,
3802 &err);
3803 if (err)
3804 goto fail;
3805
3806 reg_val |= (BCMA_CC_PMU_CTL_RES_RELOAD << BCMA_CC_PMU_CTL_RES_SHIFT);
3807
3808 brcmf_sdiod_regwl(bus->sdiodev,
3809 reg_addr,
3810 reg_val,
3811 &err);
3812 if (err)
3813 goto fail;
3814
3815
3816 sdio_release_host(bus->sdiodev->func[1]);
3817
3818 brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3819
3820 /* allocate header buffer */
3821 bus->hdrbuf = kzalloc(MAX_HDR_READ + bus->head_align, GFP_KERNEL);
3822 if (!bus->hdrbuf)
3823 return false;
3824 /* Locate an appropriately-aligned portion of hdrbuf */
3825 bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3826 bus->head_align);
3827
3828 /* Set the poll and/or interrupt flags */
3829 bus->intr = true;
3830 bus->poll = false;
3831 if (bus->poll)
3832 bus->pollrate = 1;
3833
3834 return true;
3835
3836 fail:
3837 sdio_release_host(bus->sdiodev->func[1]);
3838 return false;
3839 }
3840
3841 static int
3842 brcmf_sdio_watchdog_thread(void *data)
3843 {
3844 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3845
3846 allow_signal(SIGTERM);
3847 /* Run until signal received */
3848 while (1) {
3849 if (kthread_should_stop())
3850 break;
3851 if (!wait_for_completion_interruptible(&bus->watchdog_wait)) {
3852 brcmf_sdio_bus_watchdog(bus);
3853 /* Count the tick for reference */
3854 bus->sdcnt.tickcnt++;
3855 } else
3856 break;
3857 }
3858 return 0;
3859 }
3860
3861 static void
3862 brcmf_sdio_watchdog(unsigned long data)
3863 {
3864 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3865
3866 if (bus->watchdog_tsk) {
3867 complete(&bus->watchdog_wait);
3868 /* Reschedule the watchdog */
3869 if (bus->wd_timer_valid)
3870 mod_timer(&bus->timer,
3871 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
3872 }
3873 }
3874
3875 static struct brcmf_bus_ops brcmf_sdio_bus_ops = {
3876 .stop = brcmf_sdio_bus_stop,
3877 .preinit = brcmf_sdio_bus_preinit,
3878 .init = brcmf_sdio_bus_init,
3879 .txdata = brcmf_sdio_bus_txdata,
3880 .txctl = brcmf_sdio_bus_txctl,
3881 .rxctl = brcmf_sdio_bus_rxctl,
3882 .gettxq = brcmf_sdio_bus_gettxq,
3883 };
3884
3885 struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
3886 {
3887 int ret;
3888 struct brcmf_sdio *bus;
3889
3890 brcmf_dbg(TRACE, "Enter\n");
3891
3892 /* Allocate private bus interface state */
3893 bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
3894 if (!bus)
3895 goto fail;
3896
3897 bus->sdiodev = sdiodev;
3898 sdiodev->bus = bus;
3899 skb_queue_head_init(&bus->glom);
3900 bus->txbound = BRCMF_TXBOUND;
3901 bus->rxbound = BRCMF_RXBOUND;
3902 bus->txminmax = BRCMF_TXMINMAX;
3903 bus->tx_seq = SDPCM_SEQ_WRAP - 1;
3904
3905 /* platform specific configuration:
3906 * alignments must be at least 4 bytes for ADMA
3907 */
3908 bus->head_align = ALIGNMENT;
3909 bus->sgentry_align = ALIGNMENT;
3910 if (sdiodev->pdata) {
3911 if (sdiodev->pdata->sd_head_align > ALIGNMENT)
3912 bus->head_align = sdiodev->pdata->sd_head_align;
3913 if (sdiodev->pdata->sd_sgentry_align > ALIGNMENT)
3914 bus->sgentry_align = sdiodev->pdata->sd_sgentry_align;
3915 }
3916
3917 INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
3918 bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");
3919 if (bus->brcmf_wq == NULL) {
3920 brcmf_err("insufficient memory to create txworkqueue\n");
3921 goto fail;
3922 }
3923
3924 /* attempt to attach to the dongle */
3925 if (!(brcmf_sdio_probe_attach(bus))) {
3926 brcmf_err("brcmf_sdio_probe_attach failed\n");
3927 goto fail;
3928 }
3929
3930 spin_lock_init(&bus->rxctl_lock);
3931 spin_lock_init(&bus->txqlock);
3932 init_waitqueue_head(&bus->ctrl_wait);
3933 init_waitqueue_head(&bus->dcmd_resp_wait);
3934
3935 /* Set up the watchdog timer */
3936 init_timer(&bus->timer);
3937 bus->timer.data = (unsigned long)bus;
3938 bus->timer.function = brcmf_sdio_watchdog;
3939
3940 /* Initialize watchdog thread */
3941 init_completion(&bus->watchdog_wait);
3942 bus->watchdog_tsk = kthread_run(brcmf_sdio_watchdog_thread,
3943 bus, "brcmf_watchdog");
3944 if (IS_ERR(bus->watchdog_tsk)) {
3945 pr_warn("brcmf_watchdog thread failed to start\n");
3946 bus->watchdog_tsk = NULL;
3947 }
3948 /* Initialize DPC thread */
3949 atomic_set(&bus->dpc_tskcnt, 0);
3950
3951 /* Assign bus interface call back */
3952 bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
3953 bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops;
3954 bus->sdiodev->bus_if->chip = bus->ci->chip;
3955 bus->sdiodev->bus_if->chiprev = bus->ci->chiprev;
3956
3957 /* default sdio bus header length for tx packet */
3958 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
3959
3960 /* Attach to the common layer, reserve hdr space */
3961 ret = brcmf_attach(bus->sdiodev->dev);
3962 if (ret != 0) {
3963 brcmf_err("brcmf_attach failed\n");
3964 goto fail;
3965 }
3966
3967 /* Allocate buffers */
3968 if (bus->sdiodev->bus_if->maxctl) {
3969 bus->rxblen =
3970 roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
3971 ALIGNMENT) + bus->head_align;
3972 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
3973 if (!(bus->rxbuf)) {
3974 brcmf_err("rxbuf allocation failed\n");
3975 goto fail;
3976 }
3977 }
3978
3979 sdio_claim_host(bus->sdiodev->func[1]);
3980
3981 /* Disable F2 to clear any intermediate frame state on the dongle */
3982 sdio_disable_func(bus->sdiodev->func[SDIO_FUNC_2]);
3983
3984 bus->rxflow = false;
3985
3986 /* Done with backplane-dependent accesses, can drop clock... */
3987 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
3988
3989 sdio_release_host(bus->sdiodev->func[1]);
3990
3991 /* ...and initialize clock/power states */
3992 bus->clkstate = CLK_SDONLY;
3993 bus->idletime = BRCMF_IDLE_INTERVAL;
3994 bus->idleclock = BRCMF_IDLE_ACTIVE;
3995
3996 /* Query the F2 block size, set roundup accordingly */
3997 bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
3998 bus->roundup = min(max_roundup, bus->blocksize);
3999
4000 /* SR state */
4001 bus->sleeping = false;
4002 bus->sr_enabled = false;
4003
4004 brcmf_sdio_debugfs_create(bus);
4005 brcmf_dbg(INFO, "completed!!\n");
4006
4007 /* if firmware path present try to download and bring up bus */
4008 ret = brcmf_bus_start(bus->sdiodev->dev);
4009 if (ret != 0) {
4010 brcmf_err("dongle is not responding\n");
4011 goto fail;
4012 }
4013
4014 return bus;
4015
4016 fail:
4017 brcmf_sdio_remove(bus);
4018 return NULL;
4019 }
4020
4021 /* Detach and free everything */
4022 void brcmf_sdio_remove(struct brcmf_sdio *bus)
4023 {
4024 brcmf_dbg(TRACE, "Enter\n");
4025
4026 if (bus) {
4027 /* De-register interrupt handler */
4028 brcmf_sdiod_intr_unregister(bus->sdiodev);
4029
4030 cancel_work_sync(&bus->datawork);
4031 if (bus->brcmf_wq)
4032 destroy_workqueue(bus->brcmf_wq);
4033
4034 if (bus->sdiodev->bus_if->drvr) {
4035 brcmf_detach(bus->sdiodev->dev);
4036 }
4037
4038 if (bus->ci) {
4039 if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) {
4040 sdio_claim_host(bus->sdiodev->func[1]);
4041 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
4042 /* Leave the device in state where it is
4043 * 'quiet'. This is done by putting it in
4044 * download_state which essentially resets
4045 * all necessary cores.
4046 */
4047 msleep(20);
4048 brcmf_sdio_chip_enter_download(bus->sdiodev,
4049 bus->ci);
4050 brcmf_sdio_clkctl(bus, CLK_NONE, false);
4051 sdio_release_host(bus->sdiodev->func[1]);
4052 }
4053 brcmf_sdio_chip_detach(&bus->ci);
4054 }
4055
4056 brcmu_pkt_buf_free_skb(bus->txglom_sgpad);
4057 kfree(bus->rxbuf);
4058 kfree(bus->hdrbuf);
4059 kfree(bus);
4060 }
4061
4062 brcmf_dbg(TRACE, "Disconnected\n");
4063 }
4064
4065 void brcmf_sdio_wd_timer(struct brcmf_sdio *bus, uint wdtick)
4066 {
4067 /* Totally stop the timer */
4068 if (!wdtick && bus->wd_timer_valid) {
4069 del_timer_sync(&bus->timer);
4070 bus->wd_timer_valid = false;
4071 bus->save_ms = wdtick;
4072 return;
4073 }
4074
4075 /* don't start the wd until fw is loaded */
4076 if (bus->sdiodev->bus_if->state != BRCMF_BUS_DATA)
4077 return;
4078
4079 if (wdtick) {
4080 if (bus->save_ms != BRCMF_WD_POLL_MS) {
4081 if (bus->wd_timer_valid)
4082 /* Stop timer and restart at new value */
4083 del_timer_sync(&bus->timer);
4084
4085 /* Create timer again when watchdog period is
4086 dynamically changed or in the first instance
4087 */
4088 bus->timer.expires =
4089 jiffies + BRCMF_WD_POLL_MS * HZ / 1000;
4090 add_timer(&bus->timer);
4091
4092 } else {
4093 /* Re arm the timer, at last watchdog period */
4094 mod_timer(&bus->timer,
4095 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
4096 }
4097
4098 bus->wd_timer_valid = true;
4099 bus->save_ms = wdtick;
4100 }
4101 }
Arne's tree of linux kernel.