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Merge branch 'dice-driver-playback-only' of git://git.alsa-project.org/alsa-kprivate...
[deliverable/linux.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 <asm/unaligned.h>
36 #include <defs.h>
37 #include <brcmu_wifi.h>
38 #include <brcmu_utils.h>
39 #include <brcm_hw_ids.h>
40 #include <soc.h>
41 #include "sdio_host.h"
42 #include "sdio_chip.h"
43
44 #define DCMD_RESP_TIMEOUT 2000 /* In milli second */
45
46 #ifdef DEBUG
47
48 #define BRCMF_TRAP_INFO_SIZE 80
49
50 #define CBUF_LEN (128)
51
52 /* Device console log buffer state */
53 #define CONSOLE_BUFFER_MAX 2024
54
55 struct rte_log_le {
56 __le32 buf; /* Can't be pointer on (64-bit) hosts */
57 __le32 buf_size;
58 __le32 idx;
59 char *_buf_compat; /* Redundant pointer for backward compat. */
60 };
61
62 struct rte_console {
63 /* Virtual UART
64 * When there is no UART (e.g. Quickturn),
65 * the host should write a complete
66 * input line directly into cbuf and then write
67 * the length into vcons_in.
68 * This may also be used when there is a real UART
69 * (at risk of conflicting with
70 * the real UART). vcons_out is currently unused.
71 */
72 uint vcons_in;
73 uint vcons_out;
74
75 /* Output (logging) buffer
76 * Console output is written to a ring buffer log_buf at index log_idx.
77 * The host may read the output when it sees log_idx advance.
78 * Output will be lost if the output wraps around faster than the host
79 * polls.
80 */
81 struct rte_log_le log_le;
82
83 /* Console input line buffer
84 * Characters are read one at a time into cbuf
85 * until <CR> is received, then
86 * the buffer is processed as a command line.
87 * Also used for virtual UART.
88 */
89 uint cbuf_idx;
90 char cbuf[CBUF_LEN];
91 };
92
93 #endif /* DEBUG */
94 #include <chipcommon.h>
95
96 #include "dhd_bus.h"
97 #include "dhd_dbg.h"
98 #include "tracepoint.h"
99
100 #define TXQLEN 2048 /* bulk tx queue length */
101 #define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */
102 #define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */
103 #define PRIOMASK 7
104
105 #define TXRETRIES 2 /* # of retries for tx frames */
106
107 #define BRCMF_RXBOUND 50 /* Default for max rx frames in
108 one scheduling */
109
110 #define BRCMF_TXBOUND 20 /* Default for max tx frames in
111 one scheduling */
112
113 #define BRCMF_TXMINMAX 1 /* Max tx frames if rx still pending */
114
115 #define MEMBLOCK 2048 /* Block size used for downloading
116 of dongle image */
117 #define MAX_DATA_BUF (32 * 1024) /* Must be large enough to hold
118 biggest possible glom */
119
120 #define BRCMF_FIRSTREAD (1 << 6)
121
122
123 /* SBSDIO_DEVICE_CTL */
124
125 /* 1: device will assert busy signal when receiving CMD53 */
126 #define SBSDIO_DEVCTL_SETBUSY 0x01
127 /* 1: assertion of sdio interrupt is synchronous to the sdio clock */
128 #define SBSDIO_DEVCTL_SPI_INTR_SYNC 0x02
129 /* 1: mask all interrupts to host except the chipActive (rev 8) */
130 #define SBSDIO_DEVCTL_CA_INT_ONLY 0x04
131 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
132 * sdio bus power cycle to clear (rev 9) */
133 #define SBSDIO_DEVCTL_PADS_ISO 0x08
134 /* Force SD->SB reset mapping (rev 11) */
135 #define SBSDIO_DEVCTL_SB_RST_CTL 0x30
136 /* Determined by CoreControl bit */
137 #define SBSDIO_DEVCTL_RST_CORECTL 0x00
138 /* Force backplane reset */
139 #define SBSDIO_DEVCTL_RST_BPRESET 0x10
140 /* Force no backplane reset */
141 #define SBSDIO_DEVCTL_RST_NOBPRESET 0x20
142
143 /* direct(mapped) cis space */
144
145 /* MAPPED common CIS address */
146 #define SBSDIO_CIS_BASE_COMMON 0x1000
147 /* maximum bytes in one CIS */
148 #define SBSDIO_CIS_SIZE_LIMIT 0x200
149 /* cis offset addr is < 17 bits */
150 #define SBSDIO_CIS_OFT_ADDR_MASK 0x1FFFF
151
152 /* manfid tuple length, include tuple, link bytes */
153 #define SBSDIO_CIS_MANFID_TUPLE_LEN 6
154
155 /* intstatus */
156 #define I_SMB_SW0 (1 << 0) /* To SB Mail S/W interrupt 0 */
157 #define I_SMB_SW1 (1 << 1) /* To SB Mail S/W interrupt 1 */
158 #define I_SMB_SW2 (1 << 2) /* To SB Mail S/W interrupt 2 */
159 #define I_SMB_SW3 (1 << 3) /* To SB Mail S/W interrupt 3 */
160 #define I_SMB_SW_MASK 0x0000000f /* To SB Mail S/W interrupts mask */
161 #define I_SMB_SW_SHIFT 0 /* To SB Mail S/W interrupts shift */
162 #define I_HMB_SW0 (1 << 4) /* To Host Mail S/W interrupt 0 */
163 #define I_HMB_SW1 (1 << 5) /* To Host Mail S/W interrupt 1 */
164 #define I_HMB_SW2 (1 << 6) /* To Host Mail S/W interrupt 2 */
165 #define I_HMB_SW3 (1 << 7) /* To Host Mail S/W interrupt 3 */
166 #define I_HMB_SW_MASK 0x000000f0 /* To Host Mail S/W interrupts mask */
167 #define I_HMB_SW_SHIFT 4 /* To Host Mail S/W interrupts shift */
168 #define I_WR_OOSYNC (1 << 8) /* Write Frame Out Of Sync */
169 #define I_RD_OOSYNC (1 << 9) /* Read Frame Out Of Sync */
170 #define I_PC (1 << 10) /* descriptor error */
171 #define I_PD (1 << 11) /* data error */
172 #define I_DE (1 << 12) /* Descriptor protocol Error */
173 #define I_RU (1 << 13) /* Receive descriptor Underflow */
174 #define I_RO (1 << 14) /* Receive fifo Overflow */
175 #define I_XU (1 << 15) /* Transmit fifo Underflow */
176 #define I_RI (1 << 16) /* Receive Interrupt */
177 #define I_BUSPWR (1 << 17) /* SDIO Bus Power Change (rev 9) */
178 #define I_XMTDATA_AVAIL (1 << 23) /* bits in fifo */
179 #define I_XI (1 << 24) /* Transmit Interrupt */
180 #define I_RF_TERM (1 << 25) /* Read Frame Terminate */
181 #define I_WF_TERM (1 << 26) /* Write Frame Terminate */
182 #define I_PCMCIA_XU (1 << 27) /* PCMCIA Transmit FIFO Underflow */
183 #define I_SBINT (1 << 28) /* sbintstatus Interrupt */
184 #define I_CHIPACTIVE (1 << 29) /* chip from doze to active state */
185 #define I_SRESET (1 << 30) /* CCCR RES interrupt */
186 #define I_IOE2 (1U << 31) /* CCCR IOE2 Bit Changed */
187 #define I_ERRORS (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
188 #define I_DMA (I_RI | I_XI | I_ERRORS)
189
190 /* corecontrol */
191 #define CC_CISRDY (1 << 0) /* CIS Ready */
192 #define CC_BPRESEN (1 << 1) /* CCCR RES signal */
193 #define CC_F2RDY (1 << 2) /* set CCCR IOR2 bit */
194 #define CC_CLRPADSISO (1 << 3) /* clear SDIO pads isolation */
195 #define CC_XMTDATAAVAIL_MODE (1 << 4)
196 #define CC_XMTDATAAVAIL_CTRL (1 << 5)
197
198 /* SDA_FRAMECTRL */
199 #define SFC_RF_TERM (1 << 0) /* Read Frame Terminate */
200 #define SFC_WF_TERM (1 << 1) /* Write Frame Terminate */
201 #define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */
202 #define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */
203
204 /*
205 * Software allocation of To SB Mailbox resources
206 */
207
208 /* tosbmailbox bits corresponding to intstatus bits */
209 #define SMB_NAK (1 << 0) /* Frame NAK */
210 #define SMB_INT_ACK (1 << 1) /* Host Interrupt ACK */
211 #define SMB_USE_OOB (1 << 2) /* Use OOB Wakeup */
212 #define SMB_DEV_INT (1 << 3) /* Miscellaneous Interrupt */
213
214 /* tosbmailboxdata */
215 #define SMB_DATA_VERSION_SHIFT 16 /* host protocol version */
216
217 /*
218 * Software allocation of To Host Mailbox resources
219 */
220
221 /* intstatus bits */
222 #define I_HMB_FC_STATE I_HMB_SW0 /* Flow Control State */
223 #define I_HMB_FC_CHANGE I_HMB_SW1 /* Flow Control State Changed */
224 #define I_HMB_FRAME_IND I_HMB_SW2 /* Frame Indication */
225 #define I_HMB_HOST_INT I_HMB_SW3 /* Miscellaneous Interrupt */
226
227 /* tohostmailboxdata */
228 #define HMB_DATA_NAKHANDLED 1 /* retransmit NAK'd frame */
229 #define HMB_DATA_DEVREADY 2 /* talk to host after enable */
230 #define HMB_DATA_FC 4 /* per prio flowcontrol update flag */
231 #define HMB_DATA_FWREADY 8 /* fw ready for protocol activity */
232
233 #define HMB_DATA_FCDATA_MASK 0xff000000
234 #define HMB_DATA_FCDATA_SHIFT 24
235
236 #define HMB_DATA_VERSION_MASK 0x00ff0000
237 #define HMB_DATA_VERSION_SHIFT 16
238
239 /*
240 * Software-defined protocol header
241 */
242
243 /* Current protocol version */
244 #define SDPCM_PROT_VERSION 4
245
246 /*
247 * Shared structure between dongle and the host.
248 * The structure contains pointers to trap or assert information.
249 */
250 #define SDPCM_SHARED_VERSION 0x0003
251 #define SDPCM_SHARED_VERSION_MASK 0x00FF
252 #define SDPCM_SHARED_ASSERT_BUILT 0x0100
253 #define SDPCM_SHARED_ASSERT 0x0200
254 #define SDPCM_SHARED_TRAP 0x0400
255
256 /* Space for header read, limit for data packets */
257 #define MAX_HDR_READ (1 << 6)
258 #define MAX_RX_DATASZ 2048
259
260 /* Maximum milliseconds to wait for F2 to come up */
261 #define BRCMF_WAIT_F2RDY 3000
262
263 /* Bump up limit on waiting for HT to account for first startup;
264 * if the image is doing a CRC calculation before programming the PMU
265 * for HT availability, it could take a couple hundred ms more, so
266 * max out at a 1 second (1000000us).
267 */
268 #undef PMU_MAX_TRANSITION_DLY
269 #define PMU_MAX_TRANSITION_DLY 1000000
270
271 /* Value for ChipClockCSR during initial setup */
272 #define BRCMF_INIT_CLKCTL1 (SBSDIO_FORCE_HW_CLKREQ_OFF | \
273 SBSDIO_ALP_AVAIL_REQ)
274
275 /* Flags for SDH calls */
276 #define F2SYNC (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
277
278 #define BRCMF_SDIO_FW_NAME "brcm/brcmfmac-sdio.bin"
279 #define BRCMF_SDIO_NV_NAME "brcm/brcmfmac-sdio.txt"
280 MODULE_FIRMWARE(BRCMF_SDIO_FW_NAME);
281 MODULE_FIRMWARE(BRCMF_SDIO_NV_NAME);
282
283 #define BRCMF_IDLE_IMMEDIATE (-1) /* Enter idle immediately */
284 #define BRCMF_IDLE_ACTIVE 0 /* Do not request any SD clock change
285 * when idle
286 */
287 #define BRCMF_IDLE_INTERVAL 1
288
289 #define KSO_WAIT_US 50
290 #define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US)
291
292 /*
293 * Conversion of 802.1D priority to precedence level
294 */
295 static uint prio2prec(u32 prio)
296 {
297 return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
298 (prio^2) : prio;
299 }
300
301 #ifdef DEBUG
302 /* Device console log buffer state */
303 struct brcmf_console {
304 uint count; /* Poll interval msec counter */
305 uint log_addr; /* Log struct address (fixed) */
306 struct rte_log_le log_le; /* Log struct (host copy) */
307 uint bufsize; /* Size of log buffer */
308 u8 *buf; /* Log buffer (host copy) */
309 uint last; /* Last buffer read index */
310 };
311
312 struct brcmf_trap_info {
313 __le32 type;
314 __le32 epc;
315 __le32 cpsr;
316 __le32 spsr;
317 __le32 r0; /* a1 */
318 __le32 r1; /* a2 */
319 __le32 r2; /* a3 */
320 __le32 r3; /* a4 */
321 __le32 r4; /* v1 */
322 __le32 r5; /* v2 */
323 __le32 r6; /* v3 */
324 __le32 r7; /* v4 */
325 __le32 r8; /* v5 */
326 __le32 r9; /* sb/v6 */
327 __le32 r10; /* sl/v7 */
328 __le32 r11; /* fp/v8 */
329 __le32 r12; /* ip */
330 __le32 r13; /* sp */
331 __le32 r14; /* lr */
332 __le32 pc; /* r15 */
333 };
334 #endif /* DEBUG */
335
336 struct sdpcm_shared {
337 u32 flags;
338 u32 trap_addr;
339 u32 assert_exp_addr;
340 u32 assert_file_addr;
341 u32 assert_line;
342 u32 console_addr; /* Address of struct rte_console */
343 u32 msgtrace_addr;
344 u8 tag[32];
345 u32 brpt_addr;
346 };
347
348 struct sdpcm_shared_le {
349 __le32 flags;
350 __le32 trap_addr;
351 __le32 assert_exp_addr;
352 __le32 assert_file_addr;
353 __le32 assert_line;
354 __le32 console_addr; /* Address of struct rte_console */
355 __le32 msgtrace_addr;
356 u8 tag[32];
357 __le32 brpt_addr;
358 };
359
360 /* dongle SDIO bus specific header info */
361 struct brcmf_sdio_hdrinfo {
362 u8 seq_num;
363 u8 channel;
364 u16 len;
365 u16 len_left;
366 u16 len_nxtfrm;
367 u8 dat_offset;
368 };
369
370 /* misc chip info needed by some of the routines */
371 /* Private data for SDIO bus interaction */
372 struct brcmf_sdio {
373 struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
374 struct chip_info *ci; /* Chip info struct */
375 char *vars; /* Variables (from CIS and/or other) */
376 uint varsz; /* Size of variables buffer */
377
378 u32 ramsize; /* Size of RAM in SOCRAM (bytes) */
379
380 u32 hostintmask; /* Copy of Host Interrupt Mask */
381 atomic_t intstatus; /* Intstatus bits (events) pending */
382 atomic_t fcstate; /* State of dongle flow-control */
383
384 uint blocksize; /* Block size of SDIO transfers */
385 uint roundup; /* Max roundup limit */
386
387 struct pktq txq; /* Queue length used for flow-control */
388 u8 flowcontrol; /* per prio flow control bitmask */
389 u8 tx_seq; /* Transmit sequence number (next) */
390 u8 tx_max; /* Maximum transmit sequence allowed */
391
392 u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN];
393 u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */
394 u8 rx_seq; /* Receive sequence number (expected) */
395 struct brcmf_sdio_hdrinfo cur_read;
396 /* info of current read frame */
397 bool rxskip; /* Skip receive (awaiting NAK ACK) */
398 bool rxpending; /* Data frame pending in dongle */
399
400 uint rxbound; /* Rx frames to read before resched */
401 uint txbound; /* Tx frames to send before resched */
402 uint txminmax;
403
404 struct sk_buff *glomd; /* Packet containing glomming descriptor */
405 struct sk_buff_head glom; /* Packet list for glommed superframe */
406 uint glomerr; /* Glom packet read errors */
407
408 u8 *rxbuf; /* Buffer for receiving control packets */
409 uint rxblen; /* Allocated length of rxbuf */
410 u8 *rxctl; /* Aligned pointer into rxbuf */
411 u8 *rxctl_orig; /* pointer for freeing rxctl */
412 uint rxlen; /* Length of valid data in buffer */
413 spinlock_t rxctl_lock; /* protection lock for ctrl frame resources */
414
415 u8 sdpcm_ver; /* Bus protocol reported by dongle */
416
417 bool intr; /* Use interrupts */
418 bool poll; /* Use polling */
419 atomic_t ipend; /* Device interrupt is pending */
420 uint spurious; /* Count of spurious interrupts */
421 uint pollrate; /* Ticks between device polls */
422 uint polltick; /* Tick counter */
423
424 #ifdef DEBUG
425 uint console_interval;
426 struct brcmf_console console; /* Console output polling support */
427 uint console_addr; /* Console address from shared struct */
428 #endif /* DEBUG */
429
430 uint clkstate; /* State of sd and backplane clock(s) */
431 bool activity; /* Activity flag for clock down */
432 s32 idletime; /* Control for activity timeout */
433 s32 idlecount; /* Activity timeout counter */
434 s32 idleclock; /* How to set bus driver when idle */
435 bool rxflow_mode; /* Rx flow control mode */
436 bool rxflow; /* Is rx flow control on */
437 bool alp_only; /* Don't use HT clock (ALP only) */
438
439 u8 *ctrl_frame_buf;
440 u32 ctrl_frame_len;
441 bool ctrl_frame_stat;
442
443 spinlock_t txqlock;
444 wait_queue_head_t ctrl_wait;
445 wait_queue_head_t dcmd_resp_wait;
446
447 struct timer_list timer;
448 struct completion watchdog_wait;
449 struct task_struct *watchdog_tsk;
450 bool wd_timer_valid;
451 uint save_ms;
452
453 struct workqueue_struct *brcmf_wq;
454 struct work_struct datawork;
455 atomic_t dpc_tskcnt;
456
457 const struct firmware *firmware;
458 u32 fw_ptr;
459
460 bool txoff; /* Transmit flow-controlled */
461 struct brcmf_sdio_count sdcnt;
462 bool sr_enabled; /* SaveRestore enabled */
463 bool sleeping; /* SDIO bus sleeping */
464
465 u8 tx_hdrlen; /* sdio bus header length for tx packet */
466 };
467
468 /* clkstate */
469 #define CLK_NONE 0
470 #define CLK_SDONLY 1
471 #define CLK_PENDING 2
472 #define CLK_AVAIL 3
473
474 #ifdef DEBUG
475 static int qcount[NUMPRIO];
476 #endif /* DEBUG */
477
478 #define DEFAULT_SDIO_DRIVE_STRENGTH 6 /* in milliamps */
479
480 #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
481
482 /* Retry count for register access failures */
483 static const uint retry_limit = 2;
484
485 /* Limit on rounding up frames */
486 static const uint max_roundup = 512;
487
488 #define ALIGNMENT 4
489
490 enum brcmf_sdio_frmtype {
491 BRCMF_SDIO_FT_NORMAL,
492 BRCMF_SDIO_FT_SUPER,
493 BRCMF_SDIO_FT_SUB,
494 };
495
496 static void pkt_align(struct sk_buff *p, int len, int align)
497 {
498 uint datalign;
499 datalign = (unsigned long)(p->data);
500 datalign = roundup(datalign, (align)) - datalign;
501 if (datalign)
502 skb_pull(p, datalign);
503 __skb_trim(p, len);
504 }
505
506 /* To check if there's window offered */
507 static bool data_ok(struct brcmf_sdio *bus)
508 {
509 return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
510 ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
511 }
512
513 /*
514 * Reads a register in the SDIO hardware block. This block occupies a series of
515 * adresses on the 32 bit backplane bus.
516 */
517 static int
518 r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset)
519 {
520 u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
521 int ret;
522
523 *regvar = brcmf_sdio_regrl(bus->sdiodev,
524 bus->ci->c_inf[idx].base + offset, &ret);
525
526 return ret;
527 }
528
529 static int
530 w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
531 {
532 u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
533 int ret;
534
535 brcmf_sdio_regwl(bus->sdiodev,
536 bus->ci->c_inf[idx].base + reg_offset,
537 regval, &ret);
538
539 return ret;
540 }
541
542 static int
543 brcmf_sdbrcm_kso_control(struct brcmf_sdio *bus, bool on)
544 {
545 u8 wr_val = 0, rd_val, cmp_val, bmask;
546 int err = 0;
547 int try_cnt = 0;
548
549 brcmf_dbg(TRACE, "Enter\n");
550
551 wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
552 /* 1st KSO write goes to AOS wake up core if device is asleep */
553 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
554 wr_val, &err);
555 if (err) {
556 brcmf_err("SDIO_AOS KSO write error: %d\n", err);
557 return err;
558 }
559
560 if (on) {
561 /* device WAKEUP through KSO:
562 * write bit 0 & read back until
563 * both bits 0 (kso bit) & 1 (dev on status) are set
564 */
565 cmp_val = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK |
566 SBSDIO_FUNC1_SLEEPCSR_DEVON_MASK;
567 bmask = cmp_val;
568 usleep_range(2000, 3000);
569 } else {
570 /* Put device to sleep, turn off KSO */
571 cmp_val = 0;
572 /* only check for bit0, bit1(dev on status) may not
573 * get cleared right away
574 */
575 bmask = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK;
576 }
577
578 do {
579 /* reliable KSO bit set/clr:
580 * the sdiod sleep write access is synced to PMU 32khz clk
581 * just one write attempt may fail,
582 * read it back until it matches written value
583 */
584 rd_val = brcmf_sdio_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
585 &err);
586 if (((rd_val & bmask) == cmp_val) && !err)
587 break;
588 brcmf_dbg(SDIO, "KSO wr/rd retry:%d (max: %d) ERR:%x\n",
589 try_cnt, MAX_KSO_ATTEMPTS, err);
590 udelay(KSO_WAIT_US);
591 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
592 wr_val, &err);
593 } while (try_cnt++ < MAX_KSO_ATTEMPTS);
594
595 return err;
596 }
597
598 #define PKT_AVAILABLE() (intstatus & I_HMB_FRAME_IND)
599
600 #define HOSTINTMASK (I_HMB_SW_MASK | I_CHIPACTIVE)
601
602 /* Turn backplane clock on or off */
603 static int brcmf_sdbrcm_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
604 {
605 int err;
606 u8 clkctl, clkreq, devctl;
607 unsigned long timeout;
608
609 brcmf_dbg(SDIO, "Enter\n");
610
611 clkctl = 0;
612
613 if (bus->sr_enabled) {
614 bus->clkstate = (on ? CLK_AVAIL : CLK_SDONLY);
615 return 0;
616 }
617
618 if (on) {
619 /* Request HT Avail */
620 clkreq =
621 bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
622
623 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
624 clkreq, &err);
625 if (err) {
626 brcmf_err("HT Avail request error: %d\n", err);
627 return -EBADE;
628 }
629
630 /* Check current status */
631 clkctl = brcmf_sdio_regrb(bus->sdiodev,
632 SBSDIO_FUNC1_CHIPCLKCSR, &err);
633 if (err) {
634 brcmf_err("HT Avail read error: %d\n", err);
635 return -EBADE;
636 }
637
638 /* Go to pending and await interrupt if appropriate */
639 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
640 /* Allow only clock-available interrupt */
641 devctl = brcmf_sdio_regrb(bus->sdiodev,
642 SBSDIO_DEVICE_CTL, &err);
643 if (err) {
644 brcmf_err("Devctl error setting CA: %d\n",
645 err);
646 return -EBADE;
647 }
648
649 devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
650 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
651 devctl, &err);
652 brcmf_dbg(SDIO, "CLKCTL: set PENDING\n");
653 bus->clkstate = CLK_PENDING;
654
655 return 0;
656 } else if (bus->clkstate == CLK_PENDING) {
657 /* Cancel CA-only interrupt filter */
658 devctl = brcmf_sdio_regrb(bus->sdiodev,
659 SBSDIO_DEVICE_CTL, &err);
660 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
661 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
662 devctl, &err);
663 }
664
665 /* Otherwise, wait here (polling) for HT Avail */
666 timeout = jiffies +
667 msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
668 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
669 clkctl = brcmf_sdio_regrb(bus->sdiodev,
670 SBSDIO_FUNC1_CHIPCLKCSR,
671 &err);
672 if (time_after(jiffies, timeout))
673 break;
674 else
675 usleep_range(5000, 10000);
676 }
677 if (err) {
678 brcmf_err("HT Avail request error: %d\n", err);
679 return -EBADE;
680 }
681 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
682 brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n",
683 PMU_MAX_TRANSITION_DLY, clkctl);
684 return -EBADE;
685 }
686
687 /* Mark clock available */
688 bus->clkstate = CLK_AVAIL;
689 brcmf_dbg(SDIO, "CLKCTL: turned ON\n");
690
691 #if defined(DEBUG)
692 if (!bus->alp_only) {
693 if (SBSDIO_ALPONLY(clkctl))
694 brcmf_err("HT Clock should be on\n");
695 }
696 #endif /* defined (DEBUG) */
697
698 bus->activity = true;
699 } else {
700 clkreq = 0;
701
702 if (bus->clkstate == CLK_PENDING) {
703 /* Cancel CA-only interrupt filter */
704 devctl = brcmf_sdio_regrb(bus->sdiodev,
705 SBSDIO_DEVICE_CTL, &err);
706 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
707 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
708 devctl, &err);
709 }
710
711 bus->clkstate = CLK_SDONLY;
712 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
713 clkreq, &err);
714 brcmf_dbg(SDIO, "CLKCTL: turned OFF\n");
715 if (err) {
716 brcmf_err("Failed access turning clock off: %d\n",
717 err);
718 return -EBADE;
719 }
720 }
721 return 0;
722 }
723
724 /* Change idle/active SD state */
725 static int brcmf_sdbrcm_sdclk(struct brcmf_sdio *bus, bool on)
726 {
727 brcmf_dbg(SDIO, "Enter\n");
728
729 if (on)
730 bus->clkstate = CLK_SDONLY;
731 else
732 bus->clkstate = CLK_NONE;
733
734 return 0;
735 }
736
737 /* Transition SD and backplane clock readiness */
738 static int brcmf_sdbrcm_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
739 {
740 #ifdef DEBUG
741 uint oldstate = bus->clkstate;
742 #endif /* DEBUG */
743
744 brcmf_dbg(SDIO, "Enter\n");
745
746 /* Early exit if we're already there */
747 if (bus->clkstate == target) {
748 if (target == CLK_AVAIL) {
749 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
750 bus->activity = true;
751 }
752 return 0;
753 }
754
755 switch (target) {
756 case CLK_AVAIL:
757 /* Make sure SD clock is available */
758 if (bus->clkstate == CLK_NONE)
759 brcmf_sdbrcm_sdclk(bus, true);
760 /* Now request HT Avail on the backplane */
761 brcmf_sdbrcm_htclk(bus, true, pendok);
762 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
763 bus->activity = true;
764 break;
765
766 case CLK_SDONLY:
767 /* Remove HT request, or bring up SD clock */
768 if (bus->clkstate == CLK_NONE)
769 brcmf_sdbrcm_sdclk(bus, true);
770 else if (bus->clkstate == CLK_AVAIL)
771 brcmf_sdbrcm_htclk(bus, false, false);
772 else
773 brcmf_err("request for %d -> %d\n",
774 bus->clkstate, target);
775 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
776 break;
777
778 case CLK_NONE:
779 /* Make sure to remove HT request */
780 if (bus->clkstate == CLK_AVAIL)
781 brcmf_sdbrcm_htclk(bus, false, false);
782 /* Now remove the SD clock */
783 brcmf_sdbrcm_sdclk(bus, false);
784 brcmf_sdbrcm_wd_timer(bus, 0);
785 break;
786 }
787 #ifdef DEBUG
788 brcmf_dbg(SDIO, "%d -> %d\n", oldstate, bus->clkstate);
789 #endif /* DEBUG */
790
791 return 0;
792 }
793
794 static int
795 brcmf_sdbrcm_bus_sleep(struct brcmf_sdio *bus, bool sleep, bool pendok)
796 {
797 int err = 0;
798 brcmf_dbg(TRACE, "Enter\n");
799 brcmf_dbg(SDIO, "request %s currently %s\n",
800 (sleep ? "SLEEP" : "WAKE"),
801 (bus->sleeping ? "SLEEP" : "WAKE"));
802
803 /* If SR is enabled control bus state with KSO */
804 if (bus->sr_enabled) {
805 /* Done if we're already in the requested state */
806 if (sleep == bus->sleeping)
807 goto end;
808
809 /* Going to sleep */
810 if (sleep) {
811 /* Don't sleep if something is pending */
812 if (atomic_read(&bus->intstatus) ||
813 atomic_read(&bus->ipend) > 0 ||
814 (!atomic_read(&bus->fcstate) &&
815 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
816 data_ok(bus)))
817 return -EBUSY;
818 err = brcmf_sdbrcm_kso_control(bus, false);
819 /* disable watchdog */
820 if (!err)
821 brcmf_sdbrcm_wd_timer(bus, 0);
822 } else {
823 bus->idlecount = 0;
824 err = brcmf_sdbrcm_kso_control(bus, true);
825 }
826 if (!err) {
827 /* Change state */
828 bus->sleeping = sleep;
829 brcmf_dbg(SDIO, "new state %s\n",
830 (sleep ? "SLEEP" : "WAKE"));
831 } else {
832 brcmf_err("error while changing bus sleep state %d\n",
833 err);
834 return err;
835 }
836 }
837
838 end:
839 /* control clocks */
840 if (sleep) {
841 if (!bus->sr_enabled)
842 brcmf_sdbrcm_clkctl(bus, CLK_NONE, pendok);
843 } else {
844 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, pendok);
845 }
846
847 return err;
848
849 }
850
851 static u32 brcmf_sdbrcm_hostmail(struct brcmf_sdio *bus)
852 {
853 u32 intstatus = 0;
854 u32 hmb_data;
855 u8 fcbits;
856 int ret;
857
858 brcmf_dbg(SDIO, "Enter\n");
859
860 /* Read mailbox data and ack that we did so */
861 ret = r_sdreg32(bus, &hmb_data,
862 offsetof(struct sdpcmd_regs, tohostmailboxdata));
863
864 if (ret == 0)
865 w_sdreg32(bus, SMB_INT_ACK,
866 offsetof(struct sdpcmd_regs, tosbmailbox));
867 bus->sdcnt.f1regdata += 2;
868
869 /* Dongle recomposed rx frames, accept them again */
870 if (hmb_data & HMB_DATA_NAKHANDLED) {
871 brcmf_dbg(SDIO, "Dongle reports NAK handled, expect rtx of %d\n",
872 bus->rx_seq);
873 if (!bus->rxskip)
874 brcmf_err("unexpected NAKHANDLED!\n");
875
876 bus->rxskip = false;
877 intstatus |= I_HMB_FRAME_IND;
878 }
879
880 /*
881 * DEVREADY does not occur with gSPI.
882 */
883 if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
884 bus->sdpcm_ver =
885 (hmb_data & HMB_DATA_VERSION_MASK) >>
886 HMB_DATA_VERSION_SHIFT;
887 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
888 brcmf_err("Version mismatch, dongle reports %d, "
889 "expecting %d\n",
890 bus->sdpcm_ver, SDPCM_PROT_VERSION);
891 else
892 brcmf_dbg(SDIO, "Dongle ready, protocol version %d\n",
893 bus->sdpcm_ver);
894 }
895
896 /*
897 * Flow Control has been moved into the RX headers and this out of band
898 * method isn't used any more.
899 * remaining backward compatible with older dongles.
900 */
901 if (hmb_data & HMB_DATA_FC) {
902 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
903 HMB_DATA_FCDATA_SHIFT;
904
905 if (fcbits & ~bus->flowcontrol)
906 bus->sdcnt.fc_xoff++;
907
908 if (bus->flowcontrol & ~fcbits)
909 bus->sdcnt.fc_xon++;
910
911 bus->sdcnt.fc_rcvd++;
912 bus->flowcontrol = fcbits;
913 }
914
915 /* Shouldn't be any others */
916 if (hmb_data & ~(HMB_DATA_DEVREADY |
917 HMB_DATA_NAKHANDLED |
918 HMB_DATA_FC |
919 HMB_DATA_FWREADY |
920 HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
921 brcmf_err("Unknown mailbox data content: 0x%02x\n",
922 hmb_data);
923
924 return intstatus;
925 }
926
927 static void brcmf_sdbrcm_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
928 {
929 uint retries = 0;
930 u16 lastrbc;
931 u8 hi, lo;
932 int err;
933
934 brcmf_err("%sterminate frame%s\n",
935 abort ? "abort command, " : "",
936 rtx ? ", send NAK" : "");
937
938 if (abort)
939 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
940
941 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
942 SFC_RF_TERM, &err);
943 bus->sdcnt.f1regdata++;
944
945 /* Wait until the packet has been flushed (device/FIFO stable) */
946 for (lastrbc = retries = 0xffff; retries > 0; retries--) {
947 hi = brcmf_sdio_regrb(bus->sdiodev,
948 SBSDIO_FUNC1_RFRAMEBCHI, &err);
949 lo = brcmf_sdio_regrb(bus->sdiodev,
950 SBSDIO_FUNC1_RFRAMEBCLO, &err);
951 bus->sdcnt.f1regdata += 2;
952
953 if ((hi == 0) && (lo == 0))
954 break;
955
956 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
957 brcmf_err("count growing: last 0x%04x now 0x%04x\n",
958 lastrbc, (hi << 8) + lo);
959 }
960 lastrbc = (hi << 8) + lo;
961 }
962
963 if (!retries)
964 brcmf_err("count never zeroed: last 0x%04x\n", lastrbc);
965 else
966 brcmf_dbg(SDIO, "flush took %d iterations\n", 0xffff - retries);
967
968 if (rtx) {
969 bus->sdcnt.rxrtx++;
970 err = w_sdreg32(bus, SMB_NAK,
971 offsetof(struct sdpcmd_regs, tosbmailbox));
972
973 bus->sdcnt.f1regdata++;
974 if (err == 0)
975 bus->rxskip = true;
976 }
977
978 /* Clear partial in any case */
979 bus->cur_read.len = 0;
980
981 /* If we can't reach the device, signal failure */
982 if (err)
983 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
984 }
985
986 /* return total length of buffer chain */
987 static uint brcmf_sdbrcm_glom_len(struct brcmf_sdio *bus)
988 {
989 struct sk_buff *p;
990 uint total;
991
992 total = 0;
993 skb_queue_walk(&bus->glom, p)
994 total += p->len;
995 return total;
996 }
997
998 static void brcmf_sdbrcm_free_glom(struct brcmf_sdio *bus)
999 {
1000 struct sk_buff *cur, *next;
1001
1002 skb_queue_walk_safe(&bus->glom, cur, next) {
1003 skb_unlink(cur, &bus->glom);
1004 brcmu_pkt_buf_free_skb(cur);
1005 }
1006 }
1007
1008 /**
1009 * brcmfmac sdio bus specific header
1010 * This is the lowest layer header wrapped on the packets transmitted between
1011 * host and WiFi dongle which contains information needed for SDIO core and
1012 * firmware
1013 *
1014 * It consists of 2 parts: hw header and software header
1015 * hardware header (frame tag) - 4 bytes
1016 * Byte 0~1: Frame length
1017 * Byte 2~3: Checksum, bit-wise inverse of frame length
1018 * software header - 8 bytes
1019 * Byte 0: Rx/Tx sequence number
1020 * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
1021 * Byte 2: Length of next data frame, reserved for Tx
1022 * Byte 3: Data offset
1023 * Byte 4: Flow control bits, reserved for Tx
1024 * Byte 5: Maximum Sequence number allowed by firmware for Tx, N/A for Tx packet
1025 * Byte 6~7: Reserved
1026 */
1027 #define SDPCM_HWHDR_LEN 4
1028 #define SDPCM_SWHDR_LEN 8
1029 #define SDPCM_HDRLEN (SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN)
1030 /* software header */
1031 #define SDPCM_SEQ_MASK 0x000000ff
1032 #define SDPCM_SEQ_WRAP 256
1033 #define SDPCM_CHANNEL_MASK 0x00000f00
1034 #define SDPCM_CHANNEL_SHIFT 8
1035 #define SDPCM_CONTROL_CHANNEL 0 /* Control */
1036 #define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication */
1037 #define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv */
1038 #define SDPCM_GLOM_CHANNEL 3 /* Coalesced packets */
1039 #define SDPCM_TEST_CHANNEL 15 /* Test/debug packets */
1040 #define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80)
1041 #define SDPCM_NEXTLEN_MASK 0x00ff0000
1042 #define SDPCM_NEXTLEN_SHIFT 16
1043 #define SDPCM_DOFFSET_MASK 0xff000000
1044 #define SDPCM_DOFFSET_SHIFT 24
1045 #define SDPCM_FCMASK_MASK 0x000000ff
1046 #define SDPCM_WINDOW_MASK 0x0000ff00
1047 #define SDPCM_WINDOW_SHIFT 8
1048
1049 static inline u8 brcmf_sdio_getdatoffset(u8 *swheader)
1050 {
1051 u32 hdrvalue;
1052 hdrvalue = *(u32 *)swheader;
1053 return (u8)((hdrvalue & SDPCM_DOFFSET_MASK) >> SDPCM_DOFFSET_SHIFT);
1054 }
1055
1056 static int brcmf_sdio_hdparse(struct brcmf_sdio *bus, u8 *header,
1057 struct brcmf_sdio_hdrinfo *rd,
1058 enum brcmf_sdio_frmtype type)
1059 {
1060 u16 len, checksum;
1061 u8 rx_seq, fc, tx_seq_max;
1062 u32 swheader;
1063
1064 /* hw header */
1065 len = get_unaligned_le16(header);
1066 checksum = get_unaligned_le16(header + sizeof(u16));
1067 /* All zero means no more to read */
1068 if (!(len | checksum)) {
1069 bus->rxpending = false;
1070 return -ENODATA;
1071 }
1072 if ((u16)(~(len ^ checksum))) {
1073 brcmf_err("HW header checksum error\n");
1074 bus->sdcnt.rx_badhdr++;
1075 brcmf_sdbrcm_rxfail(bus, false, false);
1076 return -EIO;
1077 }
1078 if (len < SDPCM_HDRLEN) {
1079 brcmf_err("HW header length error\n");
1080 return -EPROTO;
1081 }
1082 if (type == BRCMF_SDIO_FT_SUPER &&
1083 (roundup(len, bus->blocksize) != rd->len)) {
1084 brcmf_err("HW superframe header length error\n");
1085 return -EPROTO;
1086 }
1087 if (type == BRCMF_SDIO_FT_SUB && len > rd->len) {
1088 brcmf_err("HW subframe header length error\n");
1089 return -EPROTO;
1090 }
1091 rd->len = len;
1092
1093 /* software header */
1094 header += SDPCM_HWHDR_LEN;
1095 swheader = le32_to_cpu(*(__le32 *)header);
1096 if (type == BRCMF_SDIO_FT_SUPER && SDPCM_GLOMDESC(header)) {
1097 brcmf_err("Glom descriptor found in superframe head\n");
1098 rd->len = 0;
1099 return -EINVAL;
1100 }
1101 rx_seq = (u8)(swheader & SDPCM_SEQ_MASK);
1102 rd->channel = (swheader & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT;
1103 if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
1104 type != BRCMF_SDIO_FT_SUPER) {
1105 brcmf_err("HW header length too long\n");
1106 bus->sdcnt.rx_toolong++;
1107 brcmf_sdbrcm_rxfail(bus, false, false);
1108 rd->len = 0;
1109 return -EPROTO;
1110 }
1111 if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) {
1112 brcmf_err("Wrong channel for superframe\n");
1113 rd->len = 0;
1114 return -EINVAL;
1115 }
1116 if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL &&
1117 rd->channel != SDPCM_EVENT_CHANNEL) {
1118 brcmf_err("Wrong channel for subframe\n");
1119 rd->len = 0;
1120 return -EINVAL;
1121 }
1122 rd->dat_offset = brcmf_sdio_getdatoffset(header);
1123 if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
1124 brcmf_err("seq %d: bad data offset\n", rx_seq);
1125 bus->sdcnt.rx_badhdr++;
1126 brcmf_sdbrcm_rxfail(bus, false, false);
1127 rd->len = 0;
1128 return -ENXIO;
1129 }
1130 if (rd->seq_num != rx_seq) {
1131 brcmf_err("seq %d: sequence number error, expect %d\n",
1132 rx_seq, rd->seq_num);
1133 bus->sdcnt.rx_badseq++;
1134 rd->seq_num = rx_seq;
1135 }
1136 /* no need to check the reset for subframe */
1137 if (type == BRCMF_SDIO_FT_SUB)
1138 return 0;
1139 rd->len_nxtfrm = (swheader & SDPCM_NEXTLEN_MASK) >> SDPCM_NEXTLEN_SHIFT;
1140 if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
1141 /* only warm for NON glom packet */
1142 if (rd->channel != SDPCM_GLOM_CHANNEL)
1143 brcmf_err("seq %d: next length error\n", rx_seq);
1144 rd->len_nxtfrm = 0;
1145 }
1146 swheader = le32_to_cpu(*(__le32 *)(header + 4));
1147 fc = swheader & SDPCM_FCMASK_MASK;
1148 if (bus->flowcontrol != fc) {
1149 if (~bus->flowcontrol & fc)
1150 bus->sdcnt.fc_xoff++;
1151 if (bus->flowcontrol & ~fc)
1152 bus->sdcnt.fc_xon++;
1153 bus->sdcnt.fc_rcvd++;
1154 bus->flowcontrol = fc;
1155 }
1156 tx_seq_max = (swheader & SDPCM_WINDOW_MASK) >> SDPCM_WINDOW_SHIFT;
1157 if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
1158 brcmf_err("seq %d: max tx seq number error\n", rx_seq);
1159 tx_seq_max = bus->tx_seq + 2;
1160 }
1161 bus->tx_max = tx_seq_max;
1162
1163 return 0;
1164 }
1165
1166 static inline void brcmf_sdio_update_hwhdr(u8 *header, u16 frm_length)
1167 {
1168 *(__le16 *)header = cpu_to_le16(frm_length);
1169 *(((__le16 *)header) + 1) = cpu_to_le16(~frm_length);
1170 }
1171
1172 static void brcmf_sdio_hdpack(struct brcmf_sdio *bus, u8 *header,
1173 struct brcmf_sdio_hdrinfo *hd_info)
1174 {
1175 u32 sw_header;
1176
1177 brcmf_sdio_update_hwhdr(header, hd_info->len);
1178
1179 sw_header = bus->tx_seq;
1180 sw_header |= (hd_info->channel << SDPCM_CHANNEL_SHIFT) &
1181 SDPCM_CHANNEL_MASK;
1182 sw_header |= (hd_info->dat_offset << SDPCM_DOFFSET_SHIFT) &
1183 SDPCM_DOFFSET_MASK;
1184 *(((__le32 *)header) + 1) = cpu_to_le32(sw_header);
1185 *(((__le32 *)header) + 2) = 0;
1186 }
1187
1188 static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
1189 {
1190 u16 dlen, totlen;
1191 u8 *dptr, num = 0;
1192 u32 align = 0;
1193 u16 sublen;
1194 struct sk_buff *pfirst, *pnext;
1195
1196 int errcode;
1197 u8 doff, sfdoff;
1198
1199 struct brcmf_sdio_hdrinfo rd_new;
1200
1201 /* If packets, issue read(s) and send up packet chain */
1202 /* Return sequence numbers consumed? */
1203
1204 brcmf_dbg(SDIO, "start: glomd %p glom %p\n",
1205 bus->glomd, skb_peek(&bus->glom));
1206
1207 if (bus->sdiodev->pdata)
1208 align = bus->sdiodev->pdata->sd_sgentry_align;
1209 if (align < 4)
1210 align = 4;
1211
1212 /* If there's a descriptor, generate the packet chain */
1213 if (bus->glomd) {
1214 pfirst = pnext = NULL;
1215 dlen = (u16) (bus->glomd->len);
1216 dptr = bus->glomd->data;
1217 if (!dlen || (dlen & 1)) {
1218 brcmf_err("bad glomd len(%d), ignore descriptor\n",
1219 dlen);
1220 dlen = 0;
1221 }
1222
1223 for (totlen = num = 0; dlen; num++) {
1224 /* Get (and move past) next length */
1225 sublen = get_unaligned_le16(dptr);
1226 dlen -= sizeof(u16);
1227 dptr += sizeof(u16);
1228 if ((sublen < SDPCM_HDRLEN) ||
1229 ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1230 brcmf_err("descriptor len %d bad: %d\n",
1231 num, sublen);
1232 pnext = NULL;
1233 break;
1234 }
1235 if (sublen % align) {
1236 brcmf_err("sublen %d not multiple of %d\n",
1237 sublen, align);
1238 }
1239 totlen += sublen;
1240
1241 /* For last frame, adjust read len so total
1242 is a block multiple */
1243 if (!dlen) {
1244 sublen +=
1245 (roundup(totlen, bus->blocksize) - totlen);
1246 totlen = roundup(totlen, bus->blocksize);
1247 }
1248
1249 /* Allocate/chain packet for next subframe */
1250 pnext = brcmu_pkt_buf_get_skb(sublen + align);
1251 if (pnext == NULL) {
1252 brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
1253 num, sublen);
1254 break;
1255 }
1256 skb_queue_tail(&bus->glom, pnext);
1257
1258 /* Adhere to start alignment requirements */
1259 pkt_align(pnext, sublen, align);
1260 }
1261
1262 /* If all allocations succeeded, save packet chain
1263 in bus structure */
1264 if (pnext) {
1265 brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1266 totlen, num);
1267 if (BRCMF_GLOM_ON() && bus->cur_read.len &&
1268 totlen != bus->cur_read.len) {
1269 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1270 bus->cur_read.len, totlen, rxseq);
1271 }
1272 pfirst = pnext = NULL;
1273 } else {
1274 brcmf_sdbrcm_free_glom(bus);
1275 num = 0;
1276 }
1277
1278 /* Done with descriptor packet */
1279 brcmu_pkt_buf_free_skb(bus->glomd);
1280 bus->glomd = NULL;
1281 bus->cur_read.len = 0;
1282 }
1283
1284 /* Ok -- either we just generated a packet chain,
1285 or had one from before */
1286 if (!skb_queue_empty(&bus->glom)) {
1287 if (BRCMF_GLOM_ON()) {
1288 brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
1289 skb_queue_walk(&bus->glom, pnext) {
1290 brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n",
1291 pnext, (u8 *) (pnext->data),
1292 pnext->len, pnext->len);
1293 }
1294 }
1295
1296 pfirst = skb_peek(&bus->glom);
1297 dlen = (u16) brcmf_sdbrcm_glom_len(bus);
1298
1299 /* Do an SDIO read for the superframe. Configurable iovar to
1300 * read directly into the chained packet, or allocate a large
1301 * packet and and copy into the chain.
1302 */
1303 sdio_claim_host(bus->sdiodev->func[1]);
1304 errcode = brcmf_sdcard_recv_chain(bus->sdiodev,
1305 bus->sdiodev->sbwad,
1306 SDIO_FUNC_2, F2SYNC, &bus->glom);
1307 sdio_release_host(bus->sdiodev->func[1]);
1308 bus->sdcnt.f2rxdata++;
1309
1310 /* On failure, kill the superframe, allow a couple retries */
1311 if (errcode < 0) {
1312 brcmf_err("glom read of %d bytes failed: %d\n",
1313 dlen, errcode);
1314
1315 sdio_claim_host(bus->sdiodev->func[1]);
1316 if (bus->glomerr++ < 3) {
1317 brcmf_sdbrcm_rxfail(bus, true, true);
1318 } else {
1319 bus->glomerr = 0;
1320 brcmf_sdbrcm_rxfail(bus, true, false);
1321 bus->sdcnt.rxglomfail++;
1322 brcmf_sdbrcm_free_glom(bus);
1323 }
1324 sdio_release_host(bus->sdiodev->func[1]);
1325 return 0;
1326 }
1327
1328 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1329 pfirst->data, min_t(int, pfirst->len, 48),
1330 "SUPERFRAME:\n");
1331
1332 rd_new.seq_num = rxseq;
1333 rd_new.len = dlen;
1334 sdio_claim_host(bus->sdiodev->func[1]);
1335 errcode = brcmf_sdio_hdparse(bus, pfirst->data, &rd_new,
1336 BRCMF_SDIO_FT_SUPER);
1337 sdio_release_host(bus->sdiodev->func[1]);
1338 bus->cur_read.len = rd_new.len_nxtfrm << 4;
1339
1340 /* Remove superframe header, remember offset */
1341 skb_pull(pfirst, rd_new.dat_offset);
1342 sfdoff = rd_new.dat_offset;
1343 num = 0;
1344
1345 /* Validate all the subframe headers */
1346 skb_queue_walk(&bus->glom, pnext) {
1347 /* leave when invalid subframe is found */
1348 if (errcode)
1349 break;
1350
1351 rd_new.len = pnext->len;
1352 rd_new.seq_num = rxseq++;
1353 sdio_claim_host(bus->sdiodev->func[1]);
1354 errcode = brcmf_sdio_hdparse(bus, pnext->data, &rd_new,
1355 BRCMF_SDIO_FT_SUB);
1356 sdio_release_host(bus->sdiodev->func[1]);
1357 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1358 pnext->data, 32, "subframe:\n");
1359
1360 num++;
1361 }
1362
1363 if (errcode) {
1364 /* Terminate frame on error, request
1365 a couple retries */
1366 sdio_claim_host(bus->sdiodev->func[1]);
1367 if (bus->glomerr++ < 3) {
1368 /* Restore superframe header space */
1369 skb_push(pfirst, sfdoff);
1370 brcmf_sdbrcm_rxfail(bus, true, true);
1371 } else {
1372 bus->glomerr = 0;
1373 brcmf_sdbrcm_rxfail(bus, true, false);
1374 bus->sdcnt.rxglomfail++;
1375 brcmf_sdbrcm_free_glom(bus);
1376 }
1377 sdio_release_host(bus->sdiodev->func[1]);
1378 bus->cur_read.len = 0;
1379 return 0;
1380 }
1381
1382 /* Basic SD framing looks ok - process each packet (header) */
1383
1384 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
1385 dptr = (u8 *) (pfirst->data);
1386 sublen = get_unaligned_le16(dptr);
1387 doff = brcmf_sdio_getdatoffset(&dptr[SDPCM_HWHDR_LEN]);
1388
1389 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1390 dptr, pfirst->len,
1391 "Rx Subframe Data:\n");
1392
1393 __skb_trim(pfirst, sublen);
1394 skb_pull(pfirst, doff);
1395
1396 if (pfirst->len == 0) {
1397 skb_unlink(pfirst, &bus->glom);
1398 brcmu_pkt_buf_free_skb(pfirst);
1399 continue;
1400 }
1401
1402 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1403 pfirst->data,
1404 min_t(int, pfirst->len, 32),
1405 "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1406 bus->glom.qlen, pfirst, pfirst->data,
1407 pfirst->len, pfirst->next,
1408 pfirst->prev);
1409 }
1410 /* sent any remaining packets up */
1411 if (bus->glom.qlen)
1412 brcmf_rx_frames(bus->sdiodev->dev, &bus->glom);
1413
1414 bus->sdcnt.rxglomframes++;
1415 bus->sdcnt.rxglompkts += bus->glom.qlen;
1416 }
1417 return num;
1418 }
1419
1420 static int brcmf_sdbrcm_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
1421 bool *pending)
1422 {
1423 DECLARE_WAITQUEUE(wait, current);
1424 int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT);
1425
1426 /* Wait until control frame is available */
1427 add_wait_queue(&bus->dcmd_resp_wait, &wait);
1428 set_current_state(TASK_INTERRUPTIBLE);
1429
1430 while (!(*condition) && (!signal_pending(current) && timeout))
1431 timeout = schedule_timeout(timeout);
1432
1433 if (signal_pending(current))
1434 *pending = true;
1435
1436 set_current_state(TASK_RUNNING);
1437 remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1438
1439 return timeout;
1440 }
1441
1442 static int brcmf_sdbrcm_dcmd_resp_wake(struct brcmf_sdio *bus)
1443 {
1444 if (waitqueue_active(&bus->dcmd_resp_wait))
1445 wake_up_interruptible(&bus->dcmd_resp_wait);
1446
1447 return 0;
1448 }
1449 static void
1450 brcmf_sdbrcm_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
1451 {
1452 uint rdlen, pad;
1453 u8 *buf = NULL, *rbuf;
1454 int sdret;
1455
1456 brcmf_dbg(TRACE, "Enter\n");
1457
1458 if (bus->rxblen)
1459 buf = vzalloc(bus->rxblen);
1460 if (!buf)
1461 goto done;
1462
1463 rbuf = bus->rxbuf;
1464 pad = ((unsigned long)rbuf % BRCMF_SDALIGN);
1465 if (pad)
1466 rbuf += (BRCMF_SDALIGN - pad);
1467
1468 /* Copy the already-read portion over */
1469 memcpy(buf, hdr, BRCMF_FIRSTREAD);
1470 if (len <= BRCMF_FIRSTREAD)
1471 goto gotpkt;
1472
1473 /* Raise rdlen to next SDIO block to avoid tail command */
1474 rdlen = len - BRCMF_FIRSTREAD;
1475 if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1476 pad = bus->blocksize - (rdlen % bus->blocksize);
1477 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1478 ((len + pad) < bus->sdiodev->bus_if->maxctl))
1479 rdlen += pad;
1480 } else if (rdlen % BRCMF_SDALIGN) {
1481 rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN);
1482 }
1483
1484 /* Satisfy length-alignment requirements */
1485 if (rdlen & (ALIGNMENT - 1))
1486 rdlen = roundup(rdlen, ALIGNMENT);
1487
1488 /* Drop if the read is too big or it exceeds our maximum */
1489 if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
1490 brcmf_err("%d-byte control read exceeds %d-byte buffer\n",
1491 rdlen, bus->sdiodev->bus_if->maxctl);
1492 brcmf_sdbrcm_rxfail(bus, false, false);
1493 goto done;
1494 }
1495
1496 if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
1497 brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
1498 len, len - doff, bus->sdiodev->bus_if->maxctl);
1499 bus->sdcnt.rx_toolong++;
1500 brcmf_sdbrcm_rxfail(bus, false, false);
1501 goto done;
1502 }
1503
1504 /* Read remain of frame body */
1505 sdret = brcmf_sdcard_recv_buf(bus->sdiodev,
1506 bus->sdiodev->sbwad,
1507 SDIO_FUNC_2,
1508 F2SYNC, rbuf, rdlen);
1509 bus->sdcnt.f2rxdata++;
1510
1511 /* Control frame failures need retransmission */
1512 if (sdret < 0) {
1513 brcmf_err("read %d control bytes failed: %d\n",
1514 rdlen, sdret);
1515 bus->sdcnt.rxc_errors++;
1516 brcmf_sdbrcm_rxfail(bus, true, true);
1517 goto done;
1518 } else
1519 memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen);
1520
1521 gotpkt:
1522
1523 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
1524 buf, len, "RxCtrl:\n");
1525
1526 /* Point to valid data and indicate its length */
1527 spin_lock_bh(&bus->rxctl_lock);
1528 if (bus->rxctl) {
1529 brcmf_err("last control frame is being processed.\n");
1530 spin_unlock_bh(&bus->rxctl_lock);
1531 vfree(buf);
1532 goto done;
1533 }
1534 bus->rxctl = buf + doff;
1535 bus->rxctl_orig = buf;
1536 bus->rxlen = len - doff;
1537 spin_unlock_bh(&bus->rxctl_lock);
1538
1539 done:
1540 /* Awake any waiters */
1541 brcmf_sdbrcm_dcmd_resp_wake(bus);
1542 }
1543
1544 /* Pad read to blocksize for efficiency */
1545 static void brcmf_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
1546 {
1547 if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1548 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1549 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1550 *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1551 *rdlen += *pad;
1552 } else if (*rdlen % BRCMF_SDALIGN) {
1553 *rdlen += BRCMF_SDALIGN - (*rdlen % BRCMF_SDALIGN);
1554 }
1555 }
1556
1557 static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
1558 {
1559 struct sk_buff *pkt; /* Packet for event or data frames */
1560 struct sk_buff_head pktlist; /* needed for bus interface */
1561 u16 pad; /* Number of pad bytes to read */
1562 uint rxleft = 0; /* Remaining number of frames allowed */
1563 int ret; /* Return code from calls */
1564 uint rxcount = 0; /* Total frames read */
1565 struct brcmf_sdio_hdrinfo *rd = &bus->cur_read, rd_new;
1566 u8 head_read = 0;
1567
1568 brcmf_dbg(TRACE, "Enter\n");
1569
1570 /* Not finished unless we encounter no more frames indication */
1571 bus->rxpending = true;
1572
1573 for (rd->seq_num = bus->rx_seq, rxleft = maxframes;
1574 !bus->rxskip && rxleft &&
1575 bus->sdiodev->bus_if->state != BRCMF_BUS_DOWN;
1576 rd->seq_num++, rxleft--) {
1577
1578 /* Handle glomming separately */
1579 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
1580 u8 cnt;
1581 brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
1582 bus->glomd, skb_peek(&bus->glom));
1583 cnt = brcmf_sdbrcm_rxglom(bus, rd->seq_num);
1584 brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1585 rd->seq_num += cnt - 1;
1586 rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1587 continue;
1588 }
1589
1590 rd->len_left = rd->len;
1591 /* read header first for unknow frame length */
1592 sdio_claim_host(bus->sdiodev->func[1]);
1593 if (!rd->len) {
1594 ret = brcmf_sdcard_recv_buf(bus->sdiodev,
1595 bus->sdiodev->sbwad,
1596 SDIO_FUNC_2, F2SYNC,
1597 bus->rxhdr,
1598 BRCMF_FIRSTREAD);
1599 bus->sdcnt.f2rxhdrs++;
1600 if (ret < 0) {
1601 brcmf_err("RXHEADER FAILED: %d\n",
1602 ret);
1603 bus->sdcnt.rx_hdrfail++;
1604 brcmf_sdbrcm_rxfail(bus, true, true);
1605 sdio_release_host(bus->sdiodev->func[1]);
1606 continue;
1607 }
1608
1609 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
1610 bus->rxhdr, SDPCM_HDRLEN,
1611 "RxHdr:\n");
1612
1613 if (brcmf_sdio_hdparse(bus, bus->rxhdr, rd,
1614 BRCMF_SDIO_FT_NORMAL)) {
1615 sdio_release_host(bus->sdiodev->func[1]);
1616 if (!bus->rxpending)
1617 break;
1618 else
1619 continue;
1620 }
1621
1622 if (rd->channel == SDPCM_CONTROL_CHANNEL) {
1623 brcmf_sdbrcm_read_control(bus, bus->rxhdr,
1624 rd->len,
1625 rd->dat_offset);
1626 /* prepare the descriptor for the next read */
1627 rd->len = rd->len_nxtfrm << 4;
1628 rd->len_nxtfrm = 0;
1629 /* treat all packet as event if we don't know */
1630 rd->channel = SDPCM_EVENT_CHANNEL;
1631 sdio_release_host(bus->sdiodev->func[1]);
1632 continue;
1633 }
1634 rd->len_left = rd->len > BRCMF_FIRSTREAD ?
1635 rd->len - BRCMF_FIRSTREAD : 0;
1636 head_read = BRCMF_FIRSTREAD;
1637 }
1638
1639 brcmf_pad(bus, &pad, &rd->len_left);
1640
1641 pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read +
1642 BRCMF_SDALIGN);
1643 if (!pkt) {
1644 /* Give up on data, request rtx of events */
1645 brcmf_err("brcmu_pkt_buf_get_skb failed\n");
1646 brcmf_sdbrcm_rxfail(bus, false,
1647 RETRYCHAN(rd->channel));
1648 sdio_release_host(bus->sdiodev->func[1]);
1649 continue;
1650 }
1651 skb_pull(pkt, head_read);
1652 pkt_align(pkt, rd->len_left, BRCMF_SDALIGN);
1653
1654 ret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1655 SDIO_FUNC_2, F2SYNC, pkt);
1656 bus->sdcnt.f2rxdata++;
1657 sdio_release_host(bus->sdiodev->func[1]);
1658
1659 if (ret < 0) {
1660 brcmf_err("read %d bytes from channel %d failed: %d\n",
1661 rd->len, rd->channel, ret);
1662 brcmu_pkt_buf_free_skb(pkt);
1663 sdio_claim_host(bus->sdiodev->func[1]);
1664 brcmf_sdbrcm_rxfail(bus, true,
1665 RETRYCHAN(rd->channel));
1666 sdio_release_host(bus->sdiodev->func[1]);
1667 continue;
1668 }
1669
1670 if (head_read) {
1671 skb_push(pkt, head_read);
1672 memcpy(pkt->data, bus->rxhdr, head_read);
1673 head_read = 0;
1674 } else {
1675 memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
1676 rd_new.seq_num = rd->seq_num;
1677 sdio_claim_host(bus->sdiodev->func[1]);
1678 if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new,
1679 BRCMF_SDIO_FT_NORMAL)) {
1680 rd->len = 0;
1681 brcmu_pkt_buf_free_skb(pkt);
1682 }
1683 bus->sdcnt.rx_readahead_cnt++;
1684 if (rd->len != roundup(rd_new.len, 16)) {
1685 brcmf_err("frame length mismatch:read %d, should be %d\n",
1686 rd->len,
1687 roundup(rd_new.len, 16) >> 4);
1688 rd->len = 0;
1689 brcmf_sdbrcm_rxfail(bus, true, true);
1690 sdio_release_host(bus->sdiodev->func[1]);
1691 brcmu_pkt_buf_free_skb(pkt);
1692 continue;
1693 }
1694 sdio_release_host(bus->sdiodev->func[1]);
1695 rd->len_nxtfrm = rd_new.len_nxtfrm;
1696 rd->channel = rd_new.channel;
1697 rd->dat_offset = rd_new.dat_offset;
1698
1699 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1700 BRCMF_DATA_ON()) &&
1701 BRCMF_HDRS_ON(),
1702 bus->rxhdr, SDPCM_HDRLEN,
1703 "RxHdr:\n");
1704
1705 if (rd_new.channel == SDPCM_CONTROL_CHANNEL) {
1706 brcmf_err("readahead on control packet %d?\n",
1707 rd_new.seq_num);
1708 /* Force retry w/normal header read */
1709 rd->len = 0;
1710 sdio_claim_host(bus->sdiodev->func[1]);
1711 brcmf_sdbrcm_rxfail(bus, false, true);
1712 sdio_release_host(bus->sdiodev->func[1]);
1713 brcmu_pkt_buf_free_skb(pkt);
1714 continue;
1715 }
1716 }
1717
1718 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1719 pkt->data, rd->len, "Rx Data:\n");
1720
1721 /* Save superframe descriptor and allocate packet frame */
1722 if (rd->channel == SDPCM_GLOM_CHANNEL) {
1723 if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_HWHDR_LEN])) {
1724 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
1725 rd->len);
1726 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1727 pkt->data, rd->len,
1728 "Glom Data:\n");
1729 __skb_trim(pkt, rd->len);
1730 skb_pull(pkt, SDPCM_HDRLEN);
1731 bus->glomd = pkt;
1732 } else {
1733 brcmf_err("%s: glom superframe w/o "
1734 "descriptor!\n", __func__);
1735 sdio_claim_host(bus->sdiodev->func[1]);
1736 brcmf_sdbrcm_rxfail(bus, false, false);
1737 sdio_release_host(bus->sdiodev->func[1]);
1738 }
1739 /* prepare the descriptor for the next read */
1740 rd->len = rd->len_nxtfrm << 4;
1741 rd->len_nxtfrm = 0;
1742 /* treat all packet as event if we don't know */
1743 rd->channel = SDPCM_EVENT_CHANNEL;
1744 continue;
1745 }
1746
1747 /* Fill in packet len and prio, deliver upward */
1748 __skb_trim(pkt, rd->len);
1749 skb_pull(pkt, rd->dat_offset);
1750
1751 /* prepare the descriptor for the next read */
1752 rd->len = rd->len_nxtfrm << 4;
1753 rd->len_nxtfrm = 0;
1754 /* treat all packet as event if we don't know */
1755 rd->channel = SDPCM_EVENT_CHANNEL;
1756
1757 if (pkt->len == 0) {
1758 brcmu_pkt_buf_free_skb(pkt);
1759 continue;
1760 }
1761
1762 skb_queue_head_init(&pktlist);
1763 skb_queue_tail(&pktlist, pkt);
1764 brcmf_rx_frames(bus->sdiodev->dev, &pktlist);
1765 }
1766
1767 rxcount = maxframes - rxleft;
1768 /* Message if we hit the limit */
1769 if (!rxleft)
1770 brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes);
1771 else
1772 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
1773 /* Back off rxseq if awaiting rtx, update rx_seq */
1774 if (bus->rxskip)
1775 rd->seq_num--;
1776 bus->rx_seq = rd->seq_num;
1777
1778 return rxcount;
1779 }
1780
1781 static void
1782 brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus)
1783 {
1784 if (waitqueue_active(&bus->ctrl_wait))
1785 wake_up_interruptible(&bus->ctrl_wait);
1786 return;
1787 }
1788
1789 /* flag marking a dummy skb added for DMA alignment requirement */
1790 #define DUMMY_SKB_FLAG 0x10000
1791 /* bit mask of data length chopped from the previous packet */
1792 #define DUMMY_SKB_CHOP_LEN_MASK 0xffff
1793 /**
1794 * brcmf_sdio_txpkt_prep - packet preparation for transmit
1795 * @bus: brcmf_sdio structure pointer
1796 * @pktq: packet list pointer
1797 * @chan: virtual channel to transmit the packet
1798 *
1799 * Processes to be applied to the packet
1800 * - Align data buffer pointer
1801 * - Align data buffer length
1802 * - Prepare header
1803 * Return: negative value if there is error
1804 */
1805 static int
1806 brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
1807 uint chan)
1808 {
1809 u16 head_pad, tail_pad, tail_chop, head_align, sg_align;
1810 int ntail;
1811 struct sk_buff *pkt_next, *pkt_new;
1812 u8 *dat_buf;
1813 unsigned blksize = bus->sdiodev->func[SDIO_FUNC_2]->cur_blksize;
1814 struct brcmf_sdio_hdrinfo hd_info = {0};
1815
1816 /* SDIO ADMA requires at least 32 bit alignment */
1817 head_align = 4;
1818 sg_align = 4;
1819 if (bus->sdiodev->pdata) {
1820 head_align = bus->sdiodev->pdata->sd_head_align > 4 ?
1821 bus->sdiodev->pdata->sd_head_align : 4;
1822 sg_align = bus->sdiodev->pdata->sd_sgentry_align > 4 ?
1823 bus->sdiodev->pdata->sd_sgentry_align : 4;
1824 }
1825 /* sg entry alignment should be a divisor of block size */
1826 WARN_ON(blksize % sg_align);
1827
1828 pkt_next = pktq->next;
1829 dat_buf = (u8 *)(pkt_next->data);
1830
1831 /* Check head padding */
1832 head_pad = ((unsigned long)dat_buf % head_align);
1833 if (head_pad) {
1834 if (skb_headroom(pkt_next) < head_pad) {
1835 bus->sdiodev->bus_if->tx_realloc++;
1836 head_pad = 0;
1837 if (skb_cow(pkt_next, head_pad))
1838 return -ENOMEM;
1839 }
1840 skb_push(pkt_next, head_pad);
1841 dat_buf = (u8 *)(pkt_next->data);
1842 memset(dat_buf, 0, head_pad + bus->tx_hdrlen);
1843 }
1844
1845 /* Check tail padding */
1846 pkt_new = NULL;
1847 tail_chop = pkt_next->len % sg_align;
1848 tail_pad = sg_align - tail_chop;
1849 tail_pad += blksize - (pkt_next->len + tail_pad) % blksize;
1850 if (skb_tailroom(pkt_next) < tail_pad && pkt_next->len > blksize) {
1851 pkt_new = brcmu_pkt_buf_get_skb(tail_pad + tail_chop);
1852 if (pkt_new == NULL)
1853 return -ENOMEM;
1854 memcpy(pkt_new->data,
1855 pkt_next->data + pkt_next->len - tail_chop,
1856 tail_chop);
1857 *(u32 *)(pkt_new->cb) = DUMMY_SKB_FLAG + tail_chop;
1858 skb_trim(pkt_next, pkt_next->len - tail_chop);
1859 __skb_queue_after(pktq, pkt_next, pkt_new);
1860 } else {
1861 ntail = pkt_next->data_len + tail_pad -
1862 (pkt_next->end - pkt_next->tail);
1863 if (skb_cloned(pkt_next) || ntail > 0)
1864 if (pskb_expand_head(pkt_next, 0, ntail, GFP_ATOMIC))
1865 return -ENOMEM;
1866 if (skb_linearize(pkt_next))
1867 return -ENOMEM;
1868 dat_buf = (u8 *)(pkt_next->data);
1869 __skb_put(pkt_next, tail_pad);
1870 }
1871
1872 /* Now prep the header */
1873 if (pkt_new)
1874 hd_info.len = pkt_next->len + tail_chop;
1875 else
1876 hd_info.len = pkt_next->len - tail_pad;
1877 hd_info.channel = chan;
1878 hd_info.dat_offset = head_pad + bus->tx_hdrlen;
1879 brcmf_sdio_hdpack(bus, dat_buf, &hd_info);
1880
1881 if (BRCMF_BYTES_ON() &&
1882 ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
1883 (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)))
1884 brcmf_dbg_hex_dump(true, pkt_next, hd_info.len, "Tx Frame:\n");
1885 else if (BRCMF_HDRS_ON())
1886 brcmf_dbg_hex_dump(true, pkt_next, head_pad + bus->tx_hdrlen,
1887 "Tx Header:\n");
1888
1889 return 0;
1890 }
1891
1892 /**
1893 * brcmf_sdio_txpkt_postp - packet post processing for transmit
1894 * @bus: brcmf_sdio structure pointer
1895 * @pktq: packet list pointer
1896 *
1897 * Processes to be applied to the packet
1898 * - Remove head padding
1899 * - Remove tail padding
1900 */
1901 static void
1902 brcmf_sdio_txpkt_postp(struct brcmf_sdio *bus, struct sk_buff_head *pktq)
1903 {
1904 u8 *hdr;
1905 u32 dat_offset;
1906 u32 dummy_flags, chop_len;
1907 struct sk_buff *pkt_next, *tmp, *pkt_prev;
1908
1909 skb_queue_walk_safe(pktq, pkt_next, tmp) {
1910 dummy_flags = *(u32 *)(pkt_next->cb);
1911 if (dummy_flags & DUMMY_SKB_FLAG) {
1912 chop_len = dummy_flags & DUMMY_SKB_CHOP_LEN_MASK;
1913 if (chop_len) {
1914 pkt_prev = pkt_next->prev;
1915 memcpy(pkt_prev->data + pkt_prev->len,
1916 pkt_next->data, chop_len);
1917 skb_put(pkt_prev, chop_len);
1918 }
1919 __skb_unlink(pkt_next, pktq);
1920 brcmu_pkt_buf_free_skb(pkt_next);
1921 } else {
1922 hdr = pkt_next->data + SDPCM_HWHDR_LEN;
1923 dat_offset = le32_to_cpu(*(__le32 *)hdr);
1924 dat_offset = (dat_offset & SDPCM_DOFFSET_MASK) >>
1925 SDPCM_DOFFSET_SHIFT;
1926 skb_pull(pkt_next, dat_offset);
1927 }
1928 }
1929 }
1930
1931 /* Writes a HW/SW header into the packet and sends it. */
1932 /* Assumes: (a) header space already there, (b) caller holds lock */
1933 static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
1934 uint chan)
1935 {
1936 int ret;
1937 int i;
1938 struct sk_buff_head localq;
1939
1940 brcmf_dbg(TRACE, "Enter\n");
1941
1942 __skb_queue_head_init(&localq);
1943 __skb_queue_tail(&localq, pkt);
1944 ret = brcmf_sdio_txpkt_prep(bus, &localq, chan);
1945 if (ret)
1946 goto done;
1947
1948 sdio_claim_host(bus->sdiodev->func[1]);
1949 ret = brcmf_sdcard_send_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1950 SDIO_FUNC_2, F2SYNC, &localq);
1951 bus->sdcnt.f2txdata++;
1952
1953 if (ret < 0) {
1954 /* On failure, abort the command and terminate the frame */
1955 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
1956 ret);
1957 bus->sdcnt.tx_sderrs++;
1958
1959 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
1960 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
1961 SFC_WF_TERM, NULL);
1962 bus->sdcnt.f1regdata++;
1963
1964 for (i = 0; i < 3; i++) {
1965 u8 hi, lo;
1966 hi = brcmf_sdio_regrb(bus->sdiodev,
1967 SBSDIO_FUNC1_WFRAMEBCHI, NULL);
1968 lo = brcmf_sdio_regrb(bus->sdiodev,
1969 SBSDIO_FUNC1_WFRAMEBCLO, NULL);
1970 bus->sdcnt.f1regdata += 2;
1971 if ((hi == 0) && (lo == 0))
1972 break;
1973 }
1974
1975 }
1976 sdio_release_host(bus->sdiodev->func[1]);
1977 if (ret == 0)
1978 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
1979
1980 done:
1981 brcmf_sdio_txpkt_postp(bus, &localq);
1982 __skb_dequeue_tail(&localq);
1983 brcmf_txcomplete(bus->sdiodev->dev, pkt, ret == 0);
1984 return ret;
1985 }
1986
1987 static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes)
1988 {
1989 struct sk_buff *pkt;
1990 u32 intstatus = 0;
1991 int ret = 0, prec_out;
1992 uint cnt = 0;
1993 u8 tx_prec_map;
1994
1995 brcmf_dbg(TRACE, "Enter\n");
1996
1997 tx_prec_map = ~bus->flowcontrol;
1998
1999 /* Send frames until the limit or some other event */
2000 for (cnt = 0; (cnt < maxframes) && data_ok(bus); cnt++) {
2001 spin_lock_bh(&bus->txqlock);
2002 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map, &prec_out);
2003 if (pkt == NULL) {
2004 spin_unlock_bh(&bus->txqlock);
2005 break;
2006 }
2007 spin_unlock_bh(&bus->txqlock);
2008
2009 ret = brcmf_sdbrcm_txpkt(bus, pkt, SDPCM_DATA_CHANNEL);
2010
2011 /* In poll mode, need to check for other events */
2012 if (!bus->intr && cnt) {
2013 /* Check device status, signal pending interrupt */
2014 sdio_claim_host(bus->sdiodev->func[1]);
2015 ret = r_sdreg32(bus, &intstatus,
2016 offsetof(struct sdpcmd_regs,
2017 intstatus));
2018 sdio_release_host(bus->sdiodev->func[1]);
2019 bus->sdcnt.f2txdata++;
2020 if (ret != 0)
2021 break;
2022 if (intstatus & bus->hostintmask)
2023 atomic_set(&bus->ipend, 1);
2024 }
2025 }
2026
2027 /* Deflow-control stack if needed */
2028 if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) &&
2029 bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
2030 bus->txoff = false;
2031 brcmf_txflowblock(bus->sdiodev->dev, false);
2032 }
2033
2034 return cnt;
2035 }
2036
2037 static void brcmf_sdbrcm_bus_stop(struct device *dev)
2038 {
2039 u32 local_hostintmask;
2040 u8 saveclk;
2041 int err;
2042 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2043 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2044 struct brcmf_sdio *bus = sdiodev->bus;
2045
2046 brcmf_dbg(TRACE, "Enter\n");
2047
2048 if (bus->watchdog_tsk) {
2049 send_sig(SIGTERM, bus->watchdog_tsk, 1);
2050 kthread_stop(bus->watchdog_tsk);
2051 bus->watchdog_tsk = NULL;
2052 }
2053
2054 sdio_claim_host(bus->sdiodev->func[1]);
2055
2056 /* Enable clock for device interrupts */
2057 brcmf_sdbrcm_bus_sleep(bus, false, false);
2058
2059 /* Disable and clear interrupts at the chip level also */
2060 w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask));
2061 local_hostintmask = bus->hostintmask;
2062 bus->hostintmask = 0;
2063
2064 /* Change our idea of bus state */
2065 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2066
2067 /* Force clocks on backplane to be sure F2 interrupt propagates */
2068 saveclk = brcmf_sdio_regrb(bus->sdiodev,
2069 SBSDIO_FUNC1_CHIPCLKCSR, &err);
2070 if (!err) {
2071 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2072 (saveclk | SBSDIO_FORCE_HT), &err);
2073 }
2074 if (err)
2075 brcmf_err("Failed to force clock for F2: err %d\n", err);
2076
2077 /* Turn off the bus (F2), free any pending packets */
2078 brcmf_dbg(INTR, "disable SDIO interrupts\n");
2079 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, SDIO_FUNC_ENABLE_1,
2080 NULL);
2081
2082 /* Clear any pending interrupts now that F2 is disabled */
2083 w_sdreg32(bus, local_hostintmask,
2084 offsetof(struct sdpcmd_regs, intstatus));
2085
2086 /* Turn off the backplane clock (only) */
2087 brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
2088 sdio_release_host(bus->sdiodev->func[1]);
2089
2090 /* Clear the data packet queues */
2091 brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
2092
2093 /* Clear any held glomming stuff */
2094 if (bus->glomd)
2095 brcmu_pkt_buf_free_skb(bus->glomd);
2096 brcmf_sdbrcm_free_glom(bus);
2097
2098 /* Clear rx control and wake any waiters */
2099 spin_lock_bh(&bus->rxctl_lock);
2100 bus->rxlen = 0;
2101 spin_unlock_bh(&bus->rxctl_lock);
2102 brcmf_sdbrcm_dcmd_resp_wake(bus);
2103
2104 /* Reset some F2 state stuff */
2105 bus->rxskip = false;
2106 bus->tx_seq = bus->rx_seq = 0;
2107 }
2108
2109 static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus)
2110 {
2111 unsigned long flags;
2112
2113 if (bus->sdiodev->oob_irq_requested) {
2114 spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags);
2115 if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) {
2116 enable_irq(bus->sdiodev->pdata->oob_irq_nr);
2117 bus->sdiodev->irq_en = true;
2118 }
2119 spin_unlock_irqrestore(&bus->sdiodev->irq_en_lock, flags);
2120 }
2121 }
2122
2123 static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus)
2124 {
2125 u8 idx;
2126 u32 addr;
2127 unsigned long val;
2128 int n, ret;
2129
2130 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
2131 addr = bus->ci->c_inf[idx].base +
2132 offsetof(struct sdpcmd_regs, intstatus);
2133
2134 ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, false);
2135 bus->sdcnt.f1regdata++;
2136 if (ret != 0)
2137 val = 0;
2138
2139 val &= bus->hostintmask;
2140 atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE));
2141
2142 /* Clear interrupts */
2143 if (val) {
2144 ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, true);
2145 bus->sdcnt.f1regdata++;
2146 }
2147
2148 if (ret) {
2149 atomic_set(&bus->intstatus, 0);
2150 } else if (val) {
2151 for_each_set_bit(n, &val, 32)
2152 set_bit(n, (unsigned long *)&bus->intstatus.counter);
2153 }
2154
2155 return ret;
2156 }
2157
2158 static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
2159 {
2160 u32 newstatus = 0;
2161 unsigned long intstatus;
2162 uint rxlimit = bus->rxbound; /* Rx frames to read before resched */
2163 uint txlimit = bus->txbound; /* Tx frames to send before resched */
2164 uint framecnt = 0; /* Temporary counter of tx/rx frames */
2165 int err = 0, n;
2166
2167 brcmf_dbg(TRACE, "Enter\n");
2168
2169 sdio_claim_host(bus->sdiodev->func[1]);
2170
2171 /* If waiting for HTAVAIL, check status */
2172 if (!bus->sr_enabled && bus->clkstate == CLK_PENDING) {
2173 u8 clkctl, devctl = 0;
2174
2175 #ifdef DEBUG
2176 /* Check for inconsistent device control */
2177 devctl = brcmf_sdio_regrb(bus->sdiodev,
2178 SBSDIO_DEVICE_CTL, &err);
2179 if (err) {
2180 brcmf_err("error reading DEVCTL: %d\n", err);
2181 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2182 }
2183 #endif /* DEBUG */
2184
2185 /* Read CSR, if clock on switch to AVAIL, else ignore */
2186 clkctl = brcmf_sdio_regrb(bus->sdiodev,
2187 SBSDIO_FUNC1_CHIPCLKCSR, &err);
2188 if (err) {
2189 brcmf_err("error reading CSR: %d\n",
2190 err);
2191 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2192 }
2193
2194 brcmf_dbg(SDIO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2195 devctl, clkctl);
2196
2197 if (SBSDIO_HTAV(clkctl)) {
2198 devctl = brcmf_sdio_regrb(bus->sdiodev,
2199 SBSDIO_DEVICE_CTL, &err);
2200 if (err) {
2201 brcmf_err("error reading DEVCTL: %d\n",
2202 err);
2203 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2204 }
2205 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
2206 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
2207 devctl, &err);
2208 if (err) {
2209 brcmf_err("error writing DEVCTL: %d\n",
2210 err);
2211 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2212 }
2213 bus->clkstate = CLK_AVAIL;
2214 }
2215 }
2216
2217 /* Make sure backplane clock is on */
2218 brcmf_sdbrcm_bus_sleep(bus, false, true);
2219
2220 /* Pending interrupt indicates new device status */
2221 if (atomic_read(&bus->ipend) > 0) {
2222 atomic_set(&bus->ipend, 0);
2223 err = brcmf_sdio_intr_rstatus(bus);
2224 }
2225
2226 /* Start with leftover status bits */
2227 intstatus = atomic_xchg(&bus->intstatus, 0);
2228
2229 /* Handle flow-control change: read new state in case our ack
2230 * crossed another change interrupt. If change still set, assume
2231 * FC ON for safety, let next loop through do the debounce.
2232 */
2233 if (intstatus & I_HMB_FC_CHANGE) {
2234 intstatus &= ~I_HMB_FC_CHANGE;
2235 err = w_sdreg32(bus, I_HMB_FC_CHANGE,
2236 offsetof(struct sdpcmd_regs, intstatus));
2237
2238 err = r_sdreg32(bus, &newstatus,
2239 offsetof(struct sdpcmd_regs, intstatus));
2240 bus->sdcnt.f1regdata += 2;
2241 atomic_set(&bus->fcstate,
2242 !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)));
2243 intstatus |= (newstatus & bus->hostintmask);
2244 }
2245
2246 /* Handle host mailbox indication */
2247 if (intstatus & I_HMB_HOST_INT) {
2248 intstatus &= ~I_HMB_HOST_INT;
2249 intstatus |= brcmf_sdbrcm_hostmail(bus);
2250 }
2251
2252 sdio_release_host(bus->sdiodev->func[1]);
2253
2254 /* Generally don't ask for these, can get CRC errors... */
2255 if (intstatus & I_WR_OOSYNC) {
2256 brcmf_err("Dongle reports WR_OOSYNC\n");
2257 intstatus &= ~I_WR_OOSYNC;
2258 }
2259
2260 if (intstatus & I_RD_OOSYNC) {
2261 brcmf_err("Dongle reports RD_OOSYNC\n");
2262 intstatus &= ~I_RD_OOSYNC;
2263 }
2264
2265 if (intstatus & I_SBINT) {
2266 brcmf_err("Dongle reports SBINT\n");
2267 intstatus &= ~I_SBINT;
2268 }
2269
2270 /* Would be active due to wake-wlan in gSPI */
2271 if (intstatus & I_CHIPACTIVE) {
2272 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2273 intstatus &= ~I_CHIPACTIVE;
2274 }
2275
2276 /* Ignore frame indications if rxskip is set */
2277 if (bus->rxskip)
2278 intstatus &= ~I_HMB_FRAME_IND;
2279
2280 /* On frame indication, read available frames */
2281 if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) {
2282 framecnt = brcmf_sdio_readframes(bus, rxlimit);
2283 if (!bus->rxpending)
2284 intstatus &= ~I_HMB_FRAME_IND;
2285 rxlimit -= min(framecnt, rxlimit);
2286 }
2287
2288 /* Keep still-pending events for next scheduling */
2289 if (intstatus) {
2290 for_each_set_bit(n, &intstatus, 32)
2291 set_bit(n, (unsigned long *)&bus->intstatus.counter);
2292 }
2293
2294 brcmf_sdbrcm_clrintr(bus);
2295
2296 if (data_ok(bus) && bus->ctrl_frame_stat &&
2297 (bus->clkstate == CLK_AVAIL)) {
2298 int i;
2299
2300 sdio_claim_host(bus->sdiodev->func[1]);
2301 err = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2302 SDIO_FUNC_2, F2SYNC, bus->ctrl_frame_buf,
2303 (u32) bus->ctrl_frame_len);
2304
2305 if (err < 0) {
2306 /* On failure, abort the command and
2307 terminate the frame */
2308 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2309 err);
2310 bus->sdcnt.tx_sderrs++;
2311
2312 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2313
2314 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2315 SFC_WF_TERM, &err);
2316 bus->sdcnt.f1regdata++;
2317
2318 for (i = 0; i < 3; i++) {
2319 u8 hi, lo;
2320 hi = brcmf_sdio_regrb(bus->sdiodev,
2321 SBSDIO_FUNC1_WFRAMEBCHI,
2322 &err);
2323 lo = brcmf_sdio_regrb(bus->sdiodev,
2324 SBSDIO_FUNC1_WFRAMEBCLO,
2325 &err);
2326 bus->sdcnt.f1regdata += 2;
2327 if ((hi == 0) && (lo == 0))
2328 break;
2329 }
2330
2331 } else {
2332 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
2333 }
2334 sdio_release_host(bus->sdiodev->func[1]);
2335 bus->ctrl_frame_stat = false;
2336 brcmf_sdbrcm_wait_event_wakeup(bus);
2337 }
2338 /* Send queued frames (limit 1 if rx may still be pending) */
2339 else if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
2340 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit
2341 && data_ok(bus)) {
2342 framecnt = bus->rxpending ? min(txlimit, bus->txminmax) :
2343 txlimit;
2344 framecnt = brcmf_sdbrcm_sendfromq(bus, framecnt);
2345 txlimit -= framecnt;
2346 }
2347
2348 if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) || (err != 0)) {
2349 brcmf_err("failed backplane access over SDIO, halting operation\n");
2350 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2351 atomic_set(&bus->intstatus, 0);
2352 } else if (atomic_read(&bus->intstatus) ||
2353 atomic_read(&bus->ipend) > 0 ||
2354 (!atomic_read(&bus->fcstate) &&
2355 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
2356 data_ok(bus)) || PKT_AVAILABLE()) {
2357 atomic_inc(&bus->dpc_tskcnt);
2358 }
2359
2360 /* If we're done for now, turn off clock request. */
2361 if ((bus->clkstate != CLK_PENDING)
2362 && bus->idletime == BRCMF_IDLE_IMMEDIATE) {
2363 bus->activity = false;
2364 brcmf_dbg(SDIO, "idle state\n");
2365 sdio_claim_host(bus->sdiodev->func[1]);
2366 brcmf_sdbrcm_bus_sleep(bus, true, false);
2367 sdio_release_host(bus->sdiodev->func[1]);
2368 }
2369 }
2370
2371 static struct pktq *brcmf_sdbrcm_bus_gettxq(struct device *dev)
2372 {
2373 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2374 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2375 struct brcmf_sdio *bus = sdiodev->bus;
2376
2377 return &bus->txq;
2378 }
2379
2380 static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt)
2381 {
2382 int ret = -EBADE;
2383 uint datalen, prec;
2384 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2385 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2386 struct brcmf_sdio *bus = sdiodev->bus;
2387 ulong flags;
2388
2389 brcmf_dbg(TRACE, "Enter\n");
2390
2391 datalen = pkt->len;
2392
2393 /* Add space for the header */
2394 skb_push(pkt, bus->tx_hdrlen);
2395 /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2396
2397 prec = prio2prec((pkt->priority & PRIOMASK));
2398
2399 /* Check for existing queue, current flow-control,
2400 pending event, or pending clock */
2401 brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
2402 bus->sdcnt.fcqueued++;
2403
2404 /* Priority based enq */
2405 spin_lock_irqsave(&bus->txqlock, flags);
2406 if (!brcmf_c_prec_enq(bus->sdiodev->dev, &bus->txq, pkt, prec)) {
2407 skb_pull(pkt, bus->tx_hdrlen);
2408 brcmf_err("out of bus->txq !!!\n");
2409 ret = -ENOSR;
2410 } else {
2411 ret = 0;
2412 }
2413
2414 if (pktq_len(&bus->txq) >= TXHI) {
2415 bus->txoff = true;
2416 brcmf_txflowblock(bus->sdiodev->dev, true);
2417 }
2418 spin_unlock_irqrestore(&bus->txqlock, flags);
2419
2420 #ifdef DEBUG
2421 if (pktq_plen(&bus->txq, prec) > qcount[prec])
2422 qcount[prec] = pktq_plen(&bus->txq, prec);
2423 #endif
2424
2425 if (atomic_read(&bus->dpc_tskcnt) == 0) {
2426 atomic_inc(&bus->dpc_tskcnt);
2427 queue_work(bus->brcmf_wq, &bus->datawork);
2428 }
2429
2430 return ret;
2431 }
2432
2433 #ifdef DEBUG
2434 #define CONSOLE_LINE_MAX 192
2435
2436 static int brcmf_sdbrcm_readconsole(struct brcmf_sdio *bus)
2437 {
2438 struct brcmf_console *c = &bus->console;
2439 u8 line[CONSOLE_LINE_MAX], ch;
2440 u32 n, idx, addr;
2441 int rv;
2442
2443 /* Don't do anything until FWREADY updates console address */
2444 if (bus->console_addr == 0)
2445 return 0;
2446
2447 /* Read console log struct */
2448 addr = bus->console_addr + offsetof(struct rte_console, log_le);
2449 rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr, (u8 *)&c->log_le,
2450 sizeof(c->log_le));
2451 if (rv < 0)
2452 return rv;
2453
2454 /* Allocate console buffer (one time only) */
2455 if (c->buf == NULL) {
2456 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2457 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2458 if (c->buf == NULL)
2459 return -ENOMEM;
2460 }
2461
2462 idx = le32_to_cpu(c->log_le.idx);
2463
2464 /* Protect against corrupt value */
2465 if (idx > c->bufsize)
2466 return -EBADE;
2467
2468 /* Skip reading the console buffer if the index pointer
2469 has not moved */
2470 if (idx == c->last)
2471 return 0;
2472
2473 /* Read the console buffer */
2474 addr = le32_to_cpu(c->log_le.buf);
2475 rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr, c->buf, c->bufsize);
2476 if (rv < 0)
2477 return rv;
2478
2479 while (c->last != idx) {
2480 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2481 if (c->last == idx) {
2482 /* This would output a partial line.
2483 * Instead, back up
2484 * the buffer pointer and output this
2485 * line next time around.
2486 */
2487 if (c->last >= n)
2488 c->last -= n;
2489 else
2490 c->last = c->bufsize - n;
2491 goto break2;
2492 }
2493 ch = c->buf[c->last];
2494 c->last = (c->last + 1) % c->bufsize;
2495 if (ch == '\n')
2496 break;
2497 line[n] = ch;
2498 }
2499
2500 if (n > 0) {
2501 if (line[n - 1] == '\r')
2502 n--;
2503 line[n] = 0;
2504 pr_debug("CONSOLE: %s\n", line);
2505 }
2506 }
2507 break2:
2508
2509 return 0;
2510 }
2511 #endif /* DEBUG */
2512
2513 static int brcmf_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
2514 {
2515 int i;
2516 int ret;
2517
2518 bus->ctrl_frame_stat = false;
2519 ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2520 SDIO_FUNC_2, F2SYNC, frame, len);
2521
2522 if (ret < 0) {
2523 /* On failure, abort the command and terminate the frame */
2524 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2525 ret);
2526 bus->sdcnt.tx_sderrs++;
2527
2528 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2529
2530 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2531 SFC_WF_TERM, NULL);
2532 bus->sdcnt.f1regdata++;
2533
2534 for (i = 0; i < 3; i++) {
2535 u8 hi, lo;
2536 hi = brcmf_sdio_regrb(bus->sdiodev,
2537 SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2538 lo = brcmf_sdio_regrb(bus->sdiodev,
2539 SBSDIO_FUNC1_WFRAMEBCLO, NULL);
2540 bus->sdcnt.f1regdata += 2;
2541 if (hi == 0 && lo == 0)
2542 break;
2543 }
2544 return ret;
2545 }
2546
2547 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
2548
2549 return ret;
2550 }
2551
2552 static int
2553 brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
2554 {
2555 u8 *frame;
2556 u16 len;
2557 uint retries = 0;
2558 u8 doff = 0;
2559 int ret = -1;
2560 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2561 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2562 struct brcmf_sdio *bus = sdiodev->bus;
2563 struct brcmf_sdio_hdrinfo hd_info = {0};
2564
2565 brcmf_dbg(TRACE, "Enter\n");
2566
2567 /* Back the pointer to make a room for bus header */
2568 frame = msg - bus->tx_hdrlen;
2569 len = (msglen += bus->tx_hdrlen);
2570
2571 /* Add alignment padding (optional for ctl frames) */
2572 doff = ((unsigned long)frame % BRCMF_SDALIGN);
2573 if (doff) {
2574 frame -= doff;
2575 len += doff;
2576 msglen += doff;
2577 memset(frame, 0, doff + bus->tx_hdrlen);
2578 }
2579 /* precondition: doff < BRCMF_SDALIGN */
2580 doff += bus->tx_hdrlen;
2581
2582 /* Round send length to next SDIO block */
2583 if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2584 u16 pad = bus->blocksize - (len % bus->blocksize);
2585 if ((pad <= bus->roundup) && (pad < bus->blocksize))
2586 len += pad;
2587 } else if (len % BRCMF_SDALIGN) {
2588 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
2589 }
2590
2591 /* Satisfy length-alignment requirements */
2592 if (len & (ALIGNMENT - 1))
2593 len = roundup(len, ALIGNMENT);
2594
2595 /* precondition: IS_ALIGNED((unsigned long)frame, 2) */
2596
2597 /* Make sure backplane clock is on */
2598 sdio_claim_host(bus->sdiodev->func[1]);
2599 brcmf_sdbrcm_bus_sleep(bus, false, false);
2600 sdio_release_host(bus->sdiodev->func[1]);
2601
2602 hd_info.len = (u16)msglen;
2603 hd_info.channel = SDPCM_CONTROL_CHANNEL;
2604 hd_info.dat_offset = doff;
2605 brcmf_sdio_hdpack(bus, frame, &hd_info);
2606
2607 if (!data_ok(bus)) {
2608 brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
2609 bus->tx_max, bus->tx_seq);
2610 bus->ctrl_frame_stat = true;
2611 /* Send from dpc */
2612 bus->ctrl_frame_buf = frame;
2613 bus->ctrl_frame_len = len;
2614
2615 wait_event_interruptible_timeout(bus->ctrl_wait,
2616 !bus->ctrl_frame_stat,
2617 msecs_to_jiffies(2000));
2618
2619 if (!bus->ctrl_frame_stat) {
2620 brcmf_dbg(SDIO, "ctrl_frame_stat == false\n");
2621 ret = 0;
2622 } else {
2623 brcmf_dbg(SDIO, "ctrl_frame_stat == true\n");
2624 ret = -1;
2625 }
2626 }
2627
2628 if (ret == -1) {
2629 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
2630 frame, len, "Tx Frame:\n");
2631 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
2632 BRCMF_HDRS_ON(),
2633 frame, min_t(u16, len, 16), "TxHdr:\n");
2634
2635 do {
2636 sdio_claim_host(bus->sdiodev->func[1]);
2637 ret = brcmf_tx_frame(bus, frame, len);
2638 sdio_release_host(bus->sdiodev->func[1]);
2639 } while (ret < 0 && retries++ < TXRETRIES);
2640 }
2641
2642 if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) &&
2643 atomic_read(&bus->dpc_tskcnt) == 0) {
2644 bus->activity = false;
2645 sdio_claim_host(bus->sdiodev->func[1]);
2646 brcmf_dbg(INFO, "idle\n");
2647 brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
2648 sdio_release_host(bus->sdiodev->func[1]);
2649 }
2650
2651 if (ret)
2652 bus->sdcnt.tx_ctlerrs++;
2653 else
2654 bus->sdcnt.tx_ctlpkts++;
2655
2656 return ret ? -EIO : 0;
2657 }
2658
2659 #ifdef DEBUG
2660 static inline bool brcmf_sdio_valid_shared_address(u32 addr)
2661 {
2662 return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
2663 }
2664
2665 static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
2666 struct sdpcm_shared *sh)
2667 {
2668 u32 addr;
2669 int rv;
2670 u32 shaddr = 0;
2671 struct sdpcm_shared_le sh_le;
2672 __le32 addr_le;
2673
2674 shaddr = bus->ci->rambase + bus->ramsize - 4;
2675
2676 /*
2677 * Read last word in socram to determine
2678 * address of sdpcm_shared structure
2679 */
2680 sdio_claim_host(bus->sdiodev->func[1]);
2681 brcmf_sdbrcm_bus_sleep(bus, false, false);
2682 rv = brcmf_sdio_ramrw(bus->sdiodev, false, shaddr, (u8 *)&addr_le, 4);
2683 sdio_release_host(bus->sdiodev->func[1]);
2684 if (rv < 0)
2685 return rv;
2686
2687 addr = le32_to_cpu(addr_le);
2688
2689 brcmf_dbg(SDIO, "sdpcm_shared address 0x%08X\n", addr);
2690
2691 /*
2692 * Check if addr is valid.
2693 * NVRAM length at the end of memory should have been overwritten.
2694 */
2695 if (!brcmf_sdio_valid_shared_address(addr)) {
2696 brcmf_err("invalid sdpcm_shared address 0x%08X\n",
2697 addr);
2698 return -EINVAL;
2699 }
2700
2701 /* Read hndrte_shared structure */
2702 rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr, (u8 *)&sh_le,
2703 sizeof(struct sdpcm_shared_le));
2704 if (rv < 0)
2705 return rv;
2706
2707 /* Endianness */
2708 sh->flags = le32_to_cpu(sh_le.flags);
2709 sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
2710 sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
2711 sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
2712 sh->assert_line = le32_to_cpu(sh_le.assert_line);
2713 sh->console_addr = le32_to_cpu(sh_le.console_addr);
2714 sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
2715
2716 if ((sh->flags & SDPCM_SHARED_VERSION_MASK) > SDPCM_SHARED_VERSION) {
2717 brcmf_err("sdpcm shared version unsupported: dhd %d dongle %d\n",
2718 SDPCM_SHARED_VERSION,
2719 sh->flags & SDPCM_SHARED_VERSION_MASK);
2720 return -EPROTO;
2721 }
2722
2723 return 0;
2724 }
2725
2726 static int brcmf_sdio_dump_console(struct brcmf_sdio *bus,
2727 struct sdpcm_shared *sh, char __user *data,
2728 size_t count)
2729 {
2730 u32 addr, console_ptr, console_size, console_index;
2731 char *conbuf = NULL;
2732 __le32 sh_val;
2733 int rv;
2734 loff_t pos = 0;
2735 int nbytes = 0;
2736
2737 /* obtain console information from device memory */
2738 addr = sh->console_addr + offsetof(struct rte_console, log_le);
2739 rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr,
2740 (u8 *)&sh_val, sizeof(u32));
2741 if (rv < 0)
2742 return rv;
2743 console_ptr = le32_to_cpu(sh_val);
2744
2745 addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
2746 rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr,
2747 (u8 *)&sh_val, sizeof(u32));
2748 if (rv < 0)
2749 return rv;
2750 console_size = le32_to_cpu(sh_val);
2751
2752 addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
2753 rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr,
2754 (u8 *)&sh_val, sizeof(u32));
2755 if (rv < 0)
2756 return rv;
2757 console_index = le32_to_cpu(sh_val);
2758
2759 /* allocate buffer for console data */
2760 if (console_size <= CONSOLE_BUFFER_MAX)
2761 conbuf = vzalloc(console_size+1);
2762
2763 if (!conbuf)
2764 return -ENOMEM;
2765
2766 /* obtain the console data from device */
2767 conbuf[console_size] = '\0';
2768 rv = brcmf_sdio_ramrw(bus->sdiodev, false, console_ptr, (u8 *)conbuf,
2769 console_size);
2770 if (rv < 0)
2771 goto done;
2772
2773 rv = simple_read_from_buffer(data, count, &pos,
2774 conbuf + console_index,
2775 console_size - console_index);
2776 if (rv < 0)
2777 goto done;
2778
2779 nbytes = rv;
2780 if (console_index > 0) {
2781 pos = 0;
2782 rv = simple_read_from_buffer(data+nbytes, count, &pos,
2783 conbuf, console_index - 1);
2784 if (rv < 0)
2785 goto done;
2786 rv += nbytes;
2787 }
2788 done:
2789 vfree(conbuf);
2790 return rv;
2791 }
2792
2793 static int brcmf_sdio_trap_info(struct brcmf_sdio *bus, struct sdpcm_shared *sh,
2794 char __user *data, size_t count)
2795 {
2796 int error, res;
2797 char buf[350];
2798 struct brcmf_trap_info tr;
2799 loff_t pos = 0;
2800
2801 if ((sh->flags & SDPCM_SHARED_TRAP) == 0) {
2802 brcmf_dbg(INFO, "no trap in firmware\n");
2803 return 0;
2804 }
2805
2806 error = brcmf_sdio_ramrw(bus->sdiodev, false, sh->trap_addr, (u8 *)&tr,
2807 sizeof(struct brcmf_trap_info));
2808 if (error < 0)
2809 return error;
2810
2811 res = scnprintf(buf, sizeof(buf),
2812 "dongle trap info: type 0x%x @ epc 0x%08x\n"
2813 " cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
2814 " lr 0x%08x pc 0x%08x offset 0x%x\n"
2815 " r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n"
2816 " r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n",
2817 le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
2818 le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
2819 le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
2820 le32_to_cpu(tr.pc), sh->trap_addr,
2821 le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
2822 le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
2823 le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
2824 le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));
2825
2826 return simple_read_from_buffer(data, count, &pos, buf, res);
2827 }
2828
2829 static int brcmf_sdio_assert_info(struct brcmf_sdio *bus,
2830 struct sdpcm_shared *sh, char __user *data,
2831 size_t count)
2832 {
2833 int error = 0;
2834 char buf[200];
2835 char file[80] = "?";
2836 char expr[80] = "<???>";
2837 int res;
2838 loff_t pos = 0;
2839
2840 if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
2841 brcmf_dbg(INFO, "firmware not built with -assert\n");
2842 return 0;
2843 } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
2844 brcmf_dbg(INFO, "no assert in dongle\n");
2845 return 0;
2846 }
2847
2848 sdio_claim_host(bus->sdiodev->func[1]);
2849 if (sh->assert_file_addr != 0) {
2850 error = brcmf_sdio_ramrw(bus->sdiodev, false,
2851 sh->assert_file_addr, (u8 *)file, 80);
2852 if (error < 0)
2853 return error;
2854 }
2855 if (sh->assert_exp_addr != 0) {
2856 error = brcmf_sdio_ramrw(bus->sdiodev, false,
2857 sh->assert_exp_addr, (u8 *)expr, 80);
2858 if (error < 0)
2859 return error;
2860 }
2861 sdio_release_host(bus->sdiodev->func[1]);
2862
2863 res = scnprintf(buf, sizeof(buf),
2864 "dongle assert: %s:%d: assert(%s)\n",
2865 file, sh->assert_line, expr);
2866 return simple_read_from_buffer(data, count, &pos, buf, res);
2867 }
2868
2869 static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
2870 {
2871 int error;
2872 struct sdpcm_shared sh;
2873
2874 error = brcmf_sdio_readshared(bus, &sh);
2875
2876 if (error < 0)
2877 return error;
2878
2879 if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
2880 brcmf_dbg(INFO, "firmware not built with -assert\n");
2881 else if (sh.flags & SDPCM_SHARED_ASSERT)
2882 brcmf_err("assertion in dongle\n");
2883
2884 if (sh.flags & SDPCM_SHARED_TRAP)
2885 brcmf_err("firmware trap in dongle\n");
2886
2887 return 0;
2888 }
2889
2890 static int brcmf_sdbrcm_died_dump(struct brcmf_sdio *bus, char __user *data,
2891 size_t count, loff_t *ppos)
2892 {
2893 int error = 0;
2894 struct sdpcm_shared sh;
2895 int nbytes = 0;
2896 loff_t pos = *ppos;
2897
2898 if (pos != 0)
2899 return 0;
2900
2901 error = brcmf_sdio_readshared(bus, &sh);
2902 if (error < 0)
2903 goto done;
2904
2905 error = brcmf_sdio_assert_info(bus, &sh, data, count);
2906 if (error < 0)
2907 goto done;
2908 nbytes = error;
2909
2910 error = brcmf_sdio_trap_info(bus, &sh, data+nbytes, count);
2911 if (error < 0)
2912 goto done;
2913 nbytes += error;
2914
2915 error = brcmf_sdio_dump_console(bus, &sh, data+nbytes, count);
2916 if (error < 0)
2917 goto done;
2918 nbytes += error;
2919
2920 error = nbytes;
2921 *ppos += nbytes;
2922 done:
2923 return error;
2924 }
2925
2926 static ssize_t brcmf_sdio_forensic_read(struct file *f, char __user *data,
2927 size_t count, loff_t *ppos)
2928 {
2929 struct brcmf_sdio *bus = f->private_data;
2930 int res;
2931
2932 res = brcmf_sdbrcm_died_dump(bus, data, count, ppos);
2933 if (res > 0)
2934 *ppos += res;
2935 return (ssize_t)res;
2936 }
2937
2938 static const struct file_operations brcmf_sdio_forensic_ops = {
2939 .owner = THIS_MODULE,
2940 .open = simple_open,
2941 .read = brcmf_sdio_forensic_read
2942 };
2943
2944 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
2945 {
2946 struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
2947 struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);
2948
2949 if (IS_ERR_OR_NULL(dentry))
2950 return;
2951
2952 debugfs_create_file("forensics", S_IRUGO, dentry, bus,
2953 &brcmf_sdio_forensic_ops);
2954 brcmf_debugfs_create_sdio_count(drvr, &bus->sdcnt);
2955 }
2956 #else
2957 static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
2958 {
2959 return 0;
2960 }
2961
2962 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
2963 {
2964 }
2965 #endif /* DEBUG */
2966
2967 static int
2968 brcmf_sdbrcm_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
2969 {
2970 int timeleft;
2971 uint rxlen = 0;
2972 bool pending;
2973 u8 *buf;
2974 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2975 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2976 struct brcmf_sdio *bus = sdiodev->bus;
2977
2978 brcmf_dbg(TRACE, "Enter\n");
2979
2980 /* Wait until control frame is available */
2981 timeleft = brcmf_sdbrcm_dcmd_resp_wait(bus, &bus->rxlen, &pending);
2982
2983 spin_lock_bh(&bus->rxctl_lock);
2984 rxlen = bus->rxlen;
2985 memcpy(msg, bus->rxctl, min(msglen, rxlen));
2986 bus->rxctl = NULL;
2987 buf = bus->rxctl_orig;
2988 bus->rxctl_orig = NULL;
2989 bus->rxlen = 0;
2990 spin_unlock_bh(&bus->rxctl_lock);
2991 vfree(buf);
2992
2993 if (rxlen) {
2994 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
2995 rxlen, msglen);
2996 } else if (timeleft == 0) {
2997 brcmf_err("resumed on timeout\n");
2998 brcmf_sdbrcm_checkdied(bus);
2999 } else if (pending) {
3000 brcmf_dbg(CTL, "cancelled\n");
3001 return -ERESTARTSYS;
3002 } else {
3003 brcmf_dbg(CTL, "resumed for unknown reason?\n");
3004 brcmf_sdbrcm_checkdied(bus);
3005 }
3006
3007 if (rxlen)
3008 bus->sdcnt.rx_ctlpkts++;
3009 else
3010 bus->sdcnt.rx_ctlerrs++;
3011
3012 return rxlen ? (int)rxlen : -ETIMEDOUT;
3013 }
3014
3015 static bool brcmf_sdbrcm_download_state(struct brcmf_sdio *bus, bool enter)
3016 {
3017 struct chip_info *ci = bus->ci;
3018
3019 /* To enter download state, disable ARM and reset SOCRAM.
3020 * To exit download state, simply reset ARM (default is RAM boot).
3021 */
3022 if (enter) {
3023 bus->alp_only = true;
3024
3025 brcmf_sdio_chip_enter_download(bus->sdiodev, ci);
3026 } else {
3027 if (!brcmf_sdio_chip_exit_download(bus->sdiodev, ci, bus->vars,
3028 bus->varsz))
3029 return false;
3030
3031 /* Allow HT Clock now that the ARM is running. */
3032 bus->alp_only = false;
3033
3034 bus->sdiodev->bus_if->state = BRCMF_BUS_LOAD;
3035 }
3036
3037 return true;
3038 }
3039
3040 static int brcmf_sdbrcm_get_image(char *buf, int len, struct brcmf_sdio *bus)
3041 {
3042 if (bus->firmware->size < bus->fw_ptr + len)
3043 len = bus->firmware->size - bus->fw_ptr;
3044
3045 memcpy(buf, &bus->firmware->data[bus->fw_ptr], len);
3046 bus->fw_ptr += len;
3047 return len;
3048 }
3049
3050 static int brcmf_sdbrcm_download_code_file(struct brcmf_sdio *bus)
3051 {
3052 int offset;
3053 uint len;
3054 u8 *memblock = NULL, *memptr;
3055 int ret;
3056 u8 idx;
3057
3058 brcmf_dbg(INFO, "Enter\n");
3059
3060 ret = request_firmware(&bus->firmware, BRCMF_SDIO_FW_NAME,
3061 &bus->sdiodev->func[2]->dev);
3062 if (ret) {
3063 brcmf_err("Fail to request firmware %d\n", ret);
3064 return ret;
3065 }
3066 bus->fw_ptr = 0;
3067
3068 memptr = memblock = kmalloc(MEMBLOCK + BRCMF_SDALIGN, GFP_ATOMIC);
3069 if (memblock == NULL) {
3070 ret = -ENOMEM;
3071 goto err;
3072 }
3073 if ((u32)(unsigned long)memblock % BRCMF_SDALIGN)
3074 memptr += (BRCMF_SDALIGN -
3075 ((u32)(unsigned long)memblock % BRCMF_SDALIGN));
3076
3077 offset = bus->ci->rambase;
3078
3079 /* Download image */
3080 len = brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus);
3081 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_ARM_CR4);
3082 if (BRCMF_MAX_CORENUM != idx)
3083 memcpy(&bus->ci->rst_vec, memptr, sizeof(bus->ci->rst_vec));
3084 while (len) {
3085 ret = brcmf_sdio_ramrw(bus->sdiodev, true, offset, memptr, len);
3086 if (ret) {
3087 brcmf_err("error %d on writing %d membytes at 0x%08x\n",
3088 ret, MEMBLOCK, offset);
3089 goto err;
3090 }
3091
3092 offset += MEMBLOCK;
3093 len = brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus);
3094 }
3095
3096 err:
3097 kfree(memblock);
3098
3099 release_firmware(bus->firmware);
3100 bus->fw_ptr = 0;
3101
3102 return ret;
3103 }
3104
3105 /*
3106 * ProcessVars:Takes a buffer of "<var>=<value>\n" lines read from a file
3107 * and ending in a NUL.
3108 * Removes carriage returns, empty lines, comment lines, and converts
3109 * newlines to NULs.
3110 * Shortens buffer as needed and pads with NULs. End of buffer is marked
3111 * by two NULs.
3112 */
3113
3114 static int brcmf_process_nvram_vars(struct brcmf_sdio *bus)
3115 {
3116 char *varbuf;
3117 char *dp;
3118 bool findNewline;
3119 int column;
3120 int ret = 0;
3121 uint buf_len, n, len;
3122
3123 len = bus->firmware->size;
3124 varbuf = vmalloc(len);
3125 if (!varbuf)
3126 return -ENOMEM;
3127
3128 memcpy(varbuf, bus->firmware->data, len);
3129 dp = varbuf;
3130
3131 findNewline = false;
3132 column = 0;
3133
3134 for (n = 0; n < len; n++) {
3135 if (varbuf[n] == 0)
3136 break;
3137 if (varbuf[n] == '\r')
3138 continue;
3139 if (findNewline && varbuf[n] != '\n')
3140 continue;
3141 findNewline = false;
3142 if (varbuf[n] == '#') {
3143 findNewline = true;
3144 continue;
3145 }
3146 if (varbuf[n] == '\n') {
3147 if (column == 0)
3148 continue;
3149 *dp++ = 0;
3150 column = 0;
3151 continue;
3152 }
3153 *dp++ = varbuf[n];
3154 column++;
3155 }
3156 buf_len = dp - varbuf;
3157 while (dp < varbuf + n)
3158 *dp++ = 0;
3159
3160 kfree(bus->vars);
3161 /* roundup needed for download to device */
3162 bus->varsz = roundup(buf_len + 1, 4);
3163 bus->vars = kmalloc(bus->varsz, GFP_KERNEL);
3164 if (bus->vars == NULL) {
3165 bus->varsz = 0;
3166 ret = -ENOMEM;
3167 goto err;
3168 }
3169
3170 /* copy the processed variables and add null termination */
3171 memcpy(bus->vars, varbuf, buf_len);
3172 bus->vars[buf_len] = 0;
3173 err:
3174 vfree(varbuf);
3175 return ret;
3176 }
3177
3178 static int brcmf_sdbrcm_download_nvram(struct brcmf_sdio *bus)
3179 {
3180 int ret;
3181
3182 ret = request_firmware(&bus->firmware, BRCMF_SDIO_NV_NAME,
3183 &bus->sdiodev->func[2]->dev);
3184 if (ret) {
3185 brcmf_err("Fail to request nvram %d\n", ret);
3186 return ret;
3187 }
3188
3189 ret = brcmf_process_nvram_vars(bus);
3190
3191 release_firmware(bus->firmware);
3192
3193 return ret;
3194 }
3195
3196 static int _brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
3197 {
3198 int bcmerror = -1;
3199
3200 /* Keep arm in reset */
3201 if (!brcmf_sdbrcm_download_state(bus, true)) {
3202 brcmf_err("error placing ARM core in reset\n");
3203 goto err;
3204 }
3205
3206 if (brcmf_sdbrcm_download_code_file(bus)) {
3207 brcmf_err("dongle image file download failed\n");
3208 goto err;
3209 }
3210
3211 if (brcmf_sdbrcm_download_nvram(bus)) {
3212 brcmf_err("dongle nvram file download failed\n");
3213 goto err;
3214 }
3215
3216 /* Take arm out of reset */
3217 if (!brcmf_sdbrcm_download_state(bus, false)) {
3218 brcmf_err("error getting out of ARM core reset\n");
3219 goto err;
3220 }
3221
3222 bcmerror = 0;
3223
3224 err:
3225 return bcmerror;
3226 }
3227
3228 static bool brcmf_sdbrcm_sr_capable(struct brcmf_sdio *bus)
3229 {
3230 u32 addr, reg;
3231
3232 brcmf_dbg(TRACE, "Enter\n");
3233
3234 /* old chips with PMU version less than 17 don't support save restore */
3235 if (bus->ci->pmurev < 17)
3236 return false;
3237
3238 /* read PMU chipcontrol register 3*/
3239 addr = CORE_CC_REG(bus->ci->c_inf[0].base, chipcontrol_addr);
3240 brcmf_sdio_regwl(bus->sdiodev, addr, 3, NULL);
3241 addr = CORE_CC_REG(bus->ci->c_inf[0].base, chipcontrol_data);
3242 reg = brcmf_sdio_regrl(bus->sdiodev, addr, NULL);
3243
3244 return (bool)reg;
3245 }
3246
3247 static void brcmf_sdbrcm_sr_init(struct brcmf_sdio *bus)
3248 {
3249 int err = 0;
3250 u8 val;
3251
3252 brcmf_dbg(TRACE, "Enter\n");
3253
3254 val = brcmf_sdio_regrb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL,
3255 &err);
3256 if (err) {
3257 brcmf_err("error reading SBSDIO_FUNC1_WAKEUPCTRL\n");
3258 return;
3259 }
3260
3261 val |= 1 << SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT;
3262 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL,
3263 val, &err);
3264 if (err) {
3265 brcmf_err("error writing SBSDIO_FUNC1_WAKEUPCTRL\n");
3266 return;
3267 }
3268
3269 /* Add CMD14 Support */
3270 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_BRCM_CARDCAP,
3271 (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT |
3272 SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT),
3273 &err);
3274 if (err) {
3275 brcmf_err("error writing SDIO_CCCR_BRCM_CARDCAP\n");
3276 return;
3277 }
3278
3279 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3280 SBSDIO_FORCE_HT, &err);
3281 if (err) {
3282 brcmf_err("error writing SBSDIO_FUNC1_CHIPCLKCSR\n");
3283 return;
3284 }
3285
3286 /* set flag */
3287 bus->sr_enabled = true;
3288 brcmf_dbg(INFO, "SR enabled\n");
3289 }
3290
3291 /* enable KSO bit */
3292 static int brcmf_sdbrcm_kso_init(struct brcmf_sdio *bus)
3293 {
3294 u8 val;
3295 int err = 0;
3296
3297 brcmf_dbg(TRACE, "Enter\n");
3298
3299 /* KSO bit added in SDIO core rev 12 */
3300 if (bus->ci->c_inf[1].rev < 12)
3301 return 0;
3302
3303 val = brcmf_sdio_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
3304 &err);
3305 if (err) {
3306 brcmf_err("error reading SBSDIO_FUNC1_SLEEPCSR\n");
3307 return err;
3308 }
3309
3310 if (!(val & SBSDIO_FUNC1_SLEEPCSR_KSO_MASK)) {
3311 val |= (SBSDIO_FUNC1_SLEEPCSR_KSO_EN <<
3312 SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
3313 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
3314 val, &err);
3315 if (err) {
3316 brcmf_err("error writing SBSDIO_FUNC1_SLEEPCSR\n");
3317 return err;
3318 }
3319 }
3320
3321 return 0;
3322 }
3323
3324
3325 static bool
3326 brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
3327 {
3328 bool ret;
3329
3330 sdio_claim_host(bus->sdiodev->func[1]);
3331
3332 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3333
3334 ret = _brcmf_sdbrcm_download_firmware(bus) == 0;
3335
3336 brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
3337
3338 sdio_release_host(bus->sdiodev->func[1]);
3339
3340 return ret;
3341 }
3342
3343 static int brcmf_sdbrcm_bus_init(struct device *dev)
3344 {
3345 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3346 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3347 struct brcmf_sdio *bus = sdiodev->bus;
3348 unsigned long timeout;
3349 u8 ready, enable;
3350 int err, ret = 0;
3351 u8 saveclk;
3352
3353 brcmf_dbg(TRACE, "Enter\n");
3354
3355 /* try to download image and nvram to the dongle */
3356 if (bus_if->state == BRCMF_BUS_DOWN) {
3357 if (!(brcmf_sdbrcm_download_firmware(bus)))
3358 return -1;
3359 }
3360
3361 if (!bus->sdiodev->bus_if->drvr)
3362 return 0;
3363
3364 /* Start the watchdog timer */
3365 bus->sdcnt.tickcnt = 0;
3366 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3367
3368 sdio_claim_host(bus->sdiodev->func[1]);
3369
3370 /* Make sure backplane clock is on, needed to generate F2 interrupt */
3371 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3372 if (bus->clkstate != CLK_AVAIL)
3373 goto exit;
3374
3375 /* Force clocks on backplane to be sure F2 interrupt propagates */
3376 saveclk = brcmf_sdio_regrb(bus->sdiodev,
3377 SBSDIO_FUNC1_CHIPCLKCSR, &err);
3378 if (!err) {
3379 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3380 (saveclk | SBSDIO_FORCE_HT), &err);
3381 }
3382 if (err) {
3383 brcmf_err("Failed to force clock for F2: err %d\n", err);
3384 goto exit;
3385 }
3386
3387 /* Enable function 2 (frame transfers) */
3388 w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
3389 offsetof(struct sdpcmd_regs, tosbmailboxdata));
3390 enable = (SDIO_FUNC_ENABLE_1 | SDIO_FUNC_ENABLE_2);
3391
3392 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
3393
3394 timeout = jiffies + msecs_to_jiffies(BRCMF_WAIT_F2RDY);
3395 ready = 0;
3396 while (enable != ready) {
3397 ready = brcmf_sdio_regrb(bus->sdiodev,
3398 SDIO_CCCR_IORx, NULL);
3399 if (time_after(jiffies, timeout))
3400 break;
3401 else if (time_after(jiffies, timeout - BRCMF_WAIT_F2RDY + 50))
3402 /* prevent busy waiting if it takes too long */
3403 msleep_interruptible(20);
3404 }
3405
3406 brcmf_dbg(INFO, "enable 0x%02x, ready 0x%02x\n", enable, ready);
3407
3408 /* If F2 successfully enabled, set core and enable interrupts */
3409 if (ready == enable) {
3410 /* Set up the interrupt mask and enable interrupts */
3411 bus->hostintmask = HOSTINTMASK;
3412 w_sdreg32(bus, bus->hostintmask,
3413 offsetof(struct sdpcmd_regs, hostintmask));
3414
3415 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_WATERMARK, 8, &err);
3416 } else {
3417 /* Disable F2 again */
3418 enable = SDIO_FUNC_ENABLE_1;
3419 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
3420 ret = -ENODEV;
3421 }
3422
3423 if (brcmf_sdbrcm_sr_capable(bus)) {
3424 brcmf_sdbrcm_sr_init(bus);
3425 } else {
3426 /* Restore previous clock setting */
3427 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3428 saveclk, &err);
3429 }
3430
3431 if (ret == 0) {
3432 ret = brcmf_sdio_intr_register(bus->sdiodev);
3433 if (ret != 0)
3434 brcmf_err("intr register failed:%d\n", ret);
3435 }
3436
3437 /* If we didn't come up, turn off backplane clock */
3438 if (bus_if->state != BRCMF_BUS_DATA)
3439 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3440
3441 exit:
3442 sdio_release_host(bus->sdiodev->func[1]);
3443
3444 return ret;
3445 }
3446
3447 void brcmf_sdbrcm_isr(void *arg)
3448 {
3449 struct brcmf_sdio *bus = (struct brcmf_sdio *) arg;
3450
3451 brcmf_dbg(TRACE, "Enter\n");
3452
3453 if (!bus) {
3454 brcmf_err("bus is null pointer, exiting\n");
3455 return;
3456 }
3457
3458 if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) {
3459 brcmf_err("bus is down. we have nothing to do\n");
3460 return;
3461 }
3462 /* Count the interrupt call */
3463 bus->sdcnt.intrcount++;
3464 if (in_interrupt())
3465 atomic_set(&bus->ipend, 1);
3466 else
3467 if (brcmf_sdio_intr_rstatus(bus)) {
3468 brcmf_err("failed backplane access\n");
3469 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
3470 }
3471
3472 /* Disable additional interrupts (is this needed now)? */
3473 if (!bus->intr)
3474 brcmf_err("isr w/o interrupt configured!\n");
3475
3476 atomic_inc(&bus->dpc_tskcnt);
3477 queue_work(bus->brcmf_wq, &bus->datawork);
3478 }
3479
3480 static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus)
3481 {
3482 #ifdef DEBUG
3483 struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev);
3484 #endif /* DEBUG */
3485
3486 brcmf_dbg(TIMER, "Enter\n");
3487
3488 /* Poll period: check device if appropriate. */
3489 if (!bus->sr_enabled &&
3490 bus->poll && (++bus->polltick >= bus->pollrate)) {
3491 u32 intstatus = 0;
3492
3493 /* Reset poll tick */
3494 bus->polltick = 0;
3495
3496 /* Check device if no interrupts */
3497 if (!bus->intr ||
3498 (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {
3499
3500 if (atomic_read(&bus->dpc_tskcnt) == 0) {
3501 u8 devpend;
3502
3503 sdio_claim_host(bus->sdiodev->func[1]);
3504 devpend = brcmf_sdio_regrb(bus->sdiodev,
3505 SDIO_CCCR_INTx,
3506 NULL);
3507 sdio_release_host(bus->sdiodev->func[1]);
3508 intstatus =
3509 devpend & (INTR_STATUS_FUNC1 |
3510 INTR_STATUS_FUNC2);
3511 }
3512
3513 /* If there is something, make like the ISR and
3514 schedule the DPC */
3515 if (intstatus) {
3516 bus->sdcnt.pollcnt++;
3517 atomic_set(&bus->ipend, 1);
3518
3519 atomic_inc(&bus->dpc_tskcnt);
3520 queue_work(bus->brcmf_wq, &bus->datawork);
3521 }
3522 }
3523
3524 /* Update interrupt tracking */
3525 bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
3526 }
3527 #ifdef DEBUG
3528 /* Poll for console output periodically */
3529 if (bus_if && bus_if->state == BRCMF_BUS_DATA &&
3530 bus->console_interval != 0) {
3531 bus->console.count += BRCMF_WD_POLL_MS;
3532 if (bus->console.count >= bus->console_interval) {
3533 bus->console.count -= bus->console_interval;
3534 sdio_claim_host(bus->sdiodev->func[1]);
3535 /* Make sure backplane clock is on */
3536 brcmf_sdbrcm_bus_sleep(bus, false, false);
3537 if (brcmf_sdbrcm_readconsole(bus) < 0)
3538 /* stop on error */
3539 bus->console_interval = 0;
3540 sdio_release_host(bus->sdiodev->func[1]);
3541 }
3542 }
3543 #endif /* DEBUG */
3544
3545 /* On idle timeout clear activity flag and/or turn off clock */
3546 if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
3547 if (++bus->idlecount >= bus->idletime) {
3548 bus->idlecount = 0;
3549 if (bus->activity) {
3550 bus->activity = false;
3551 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3552 } else {
3553 brcmf_dbg(SDIO, "idle\n");
3554 sdio_claim_host(bus->sdiodev->func[1]);
3555 brcmf_sdbrcm_bus_sleep(bus, true, false);
3556 sdio_release_host(bus->sdiodev->func[1]);
3557 }
3558 }
3559 }
3560
3561 return (atomic_read(&bus->ipend) > 0);
3562 }
3563
3564 static void brcmf_sdio_dataworker(struct work_struct *work)
3565 {
3566 struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
3567 datawork);
3568
3569 while (atomic_read(&bus->dpc_tskcnt)) {
3570 brcmf_sdbrcm_dpc(bus);
3571 atomic_dec(&bus->dpc_tskcnt);
3572 }
3573 }
3574
3575 static void brcmf_sdbrcm_release_malloc(struct brcmf_sdio *bus)
3576 {
3577 brcmf_dbg(TRACE, "Enter\n");
3578
3579 kfree(bus->rxbuf);
3580 bus->rxctl = bus->rxbuf = NULL;
3581 bus->rxlen = 0;
3582 }
3583
3584 static bool brcmf_sdbrcm_probe_malloc(struct brcmf_sdio *bus)
3585 {
3586 brcmf_dbg(TRACE, "Enter\n");
3587
3588 if (bus->sdiodev->bus_if->maxctl) {
3589 bus->rxblen =
3590 roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
3591 ALIGNMENT) + BRCMF_SDALIGN;
3592 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
3593 if (!(bus->rxbuf))
3594 return false;
3595 }
3596
3597 return true;
3598 }
3599
3600 static bool
3601 brcmf_sdbrcm_probe_attach(struct brcmf_sdio *bus, u32 regsva)
3602 {
3603 u8 clkctl = 0;
3604 int err = 0;
3605 int reg_addr;
3606 u32 reg_val;
3607 u32 drivestrength;
3608
3609 bus->alp_only = true;
3610
3611 sdio_claim_host(bus->sdiodev->func[1]);
3612
3613 pr_debug("F1 signature read @0x18000000=0x%4x\n",
3614 brcmf_sdio_regrl(bus->sdiodev, SI_ENUM_BASE, NULL));
3615
3616 /*
3617 * Force PLL off until brcmf_sdio_chip_attach()
3618 * programs PLL control regs
3619 */
3620
3621 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3622 BRCMF_INIT_CLKCTL1, &err);
3623 if (!err)
3624 clkctl = brcmf_sdio_regrb(bus->sdiodev,
3625 SBSDIO_FUNC1_CHIPCLKCSR, &err);
3626
3627 if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3628 brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3629 err, BRCMF_INIT_CLKCTL1, clkctl);
3630 goto fail;
3631 }
3632
3633 if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci, regsva)) {
3634 brcmf_err("brcmf_sdio_chip_attach failed!\n");
3635 goto fail;
3636 }
3637
3638 if (brcmf_sdbrcm_kso_init(bus)) {
3639 brcmf_err("error enabling KSO\n");
3640 goto fail;
3641 }
3642
3643 if ((bus->sdiodev->pdata) && (bus->sdiodev->pdata->drive_strength))
3644 drivestrength = bus->sdiodev->pdata->drive_strength;
3645 else
3646 drivestrength = DEFAULT_SDIO_DRIVE_STRENGTH;
3647 brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci, drivestrength);
3648
3649 /* Get info on the SOCRAM cores... */
3650 bus->ramsize = bus->ci->ramsize;
3651 if (!(bus->ramsize)) {
3652 brcmf_err("failed to find SOCRAM memory!\n");
3653 goto fail;
3654 }
3655
3656 /* Set card control so an SDIO card reset does a WLAN backplane reset */
3657 reg_val = brcmf_sdio_regrb(bus->sdiodev,
3658 SDIO_CCCR_BRCM_CARDCTRL, &err);
3659 if (err)
3660 goto fail;
3661
3662 reg_val |= SDIO_CCCR_BRCM_CARDCTRL_WLANRESET;
3663
3664 brcmf_sdio_regwb(bus->sdiodev,
3665 SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err);
3666 if (err)
3667 goto fail;
3668
3669 /* set PMUControl so a backplane reset does PMU state reload */
3670 reg_addr = CORE_CC_REG(bus->ci->c_inf[0].base,
3671 pmucontrol);
3672 reg_val = brcmf_sdio_regrl(bus->sdiodev,
3673 reg_addr,
3674 &err);
3675 if (err)
3676 goto fail;
3677
3678 reg_val |= (BCMA_CC_PMU_CTL_RES_RELOAD << BCMA_CC_PMU_CTL_RES_SHIFT);
3679
3680 brcmf_sdio_regwl(bus->sdiodev,
3681 reg_addr,
3682 reg_val,
3683 &err);
3684 if (err)
3685 goto fail;
3686
3687
3688 sdio_release_host(bus->sdiodev->func[1]);
3689
3690 brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3691
3692 /* Locate an appropriately-aligned portion of hdrbuf */
3693 bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3694 BRCMF_SDALIGN);
3695
3696 /* Set the poll and/or interrupt flags */
3697 bus->intr = true;
3698 bus->poll = false;
3699 if (bus->poll)
3700 bus->pollrate = 1;
3701
3702 return true;
3703
3704 fail:
3705 sdio_release_host(bus->sdiodev->func[1]);
3706 return false;
3707 }
3708
3709 static bool brcmf_sdbrcm_probe_init(struct brcmf_sdio *bus)
3710 {
3711 brcmf_dbg(TRACE, "Enter\n");
3712
3713 sdio_claim_host(bus->sdiodev->func[1]);
3714
3715 /* Disable F2 to clear any intermediate frame state on the dongle */
3716 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx,
3717 SDIO_FUNC_ENABLE_1, NULL);
3718
3719 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
3720 bus->rxflow = false;
3721
3722 /* Done with backplane-dependent accesses, can drop clock... */
3723 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
3724
3725 sdio_release_host(bus->sdiodev->func[1]);
3726
3727 /* ...and initialize clock/power states */
3728 bus->clkstate = CLK_SDONLY;
3729 bus->idletime = BRCMF_IDLE_INTERVAL;
3730 bus->idleclock = BRCMF_IDLE_ACTIVE;
3731
3732 /* Query the F2 block size, set roundup accordingly */
3733 bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
3734 bus->roundup = min(max_roundup, bus->blocksize);
3735
3736 /* SR state */
3737 bus->sleeping = false;
3738 bus->sr_enabled = false;
3739
3740 return true;
3741 }
3742
3743 static int
3744 brcmf_sdbrcm_watchdog_thread(void *data)
3745 {
3746 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3747
3748 allow_signal(SIGTERM);
3749 /* Run until signal received */
3750 while (1) {
3751 if (kthread_should_stop())
3752 break;
3753 if (!wait_for_completion_interruptible(&bus->watchdog_wait)) {
3754 brcmf_sdbrcm_bus_watchdog(bus);
3755 /* Count the tick for reference */
3756 bus->sdcnt.tickcnt++;
3757 } else
3758 break;
3759 }
3760 return 0;
3761 }
3762
3763 static void
3764 brcmf_sdbrcm_watchdog(unsigned long data)
3765 {
3766 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3767
3768 if (bus->watchdog_tsk) {
3769 complete(&bus->watchdog_wait);
3770 /* Reschedule the watchdog */
3771 if (bus->wd_timer_valid)
3772 mod_timer(&bus->timer,
3773 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
3774 }
3775 }
3776
3777 static void brcmf_sdbrcm_release_dongle(struct brcmf_sdio *bus)
3778 {
3779 brcmf_dbg(TRACE, "Enter\n");
3780
3781 if (bus->ci) {
3782 sdio_claim_host(bus->sdiodev->func[1]);
3783 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3784 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3785 sdio_release_host(bus->sdiodev->func[1]);
3786 brcmf_sdio_chip_detach(&bus->ci);
3787 if (bus->vars && bus->varsz)
3788 kfree(bus->vars);
3789 bus->vars = NULL;
3790 }
3791
3792 brcmf_dbg(TRACE, "Disconnected\n");
3793 }
3794
3795 /* Detach and free everything */
3796 static void brcmf_sdbrcm_release(struct brcmf_sdio *bus)
3797 {
3798 brcmf_dbg(TRACE, "Enter\n");
3799
3800 if (bus) {
3801 /* De-register interrupt handler */
3802 brcmf_sdio_intr_unregister(bus->sdiodev);
3803
3804 cancel_work_sync(&bus->datawork);
3805 if (bus->brcmf_wq)
3806 destroy_workqueue(bus->brcmf_wq);
3807
3808 if (bus->sdiodev->bus_if->drvr) {
3809 brcmf_detach(bus->sdiodev->dev);
3810 brcmf_sdbrcm_release_dongle(bus);
3811 }
3812
3813 brcmf_sdbrcm_release_malloc(bus);
3814
3815 kfree(bus);
3816 }
3817
3818 brcmf_dbg(TRACE, "Disconnected\n");
3819 }
3820
3821 static struct brcmf_bus_ops brcmf_sdio_bus_ops = {
3822 .stop = brcmf_sdbrcm_bus_stop,
3823 .init = brcmf_sdbrcm_bus_init,
3824 .txdata = brcmf_sdbrcm_bus_txdata,
3825 .txctl = brcmf_sdbrcm_bus_txctl,
3826 .rxctl = brcmf_sdbrcm_bus_rxctl,
3827 .gettxq = brcmf_sdbrcm_bus_gettxq,
3828 };
3829
3830 void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev)
3831 {
3832 int ret;
3833 struct brcmf_sdio *bus;
3834 struct brcmf_bus_dcmd *dlst;
3835 u32 dngl_txglom;
3836 u32 txglomalign = 0;
3837 u8 idx;
3838
3839 brcmf_dbg(TRACE, "Enter\n");
3840
3841 /* We make an assumption about address window mappings:
3842 * regsva == SI_ENUM_BASE*/
3843
3844 /* Allocate private bus interface state */
3845 bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
3846 if (!bus)
3847 goto fail;
3848
3849 bus->sdiodev = sdiodev;
3850 sdiodev->bus = bus;
3851 skb_queue_head_init(&bus->glom);
3852 bus->txbound = BRCMF_TXBOUND;
3853 bus->rxbound = BRCMF_RXBOUND;
3854 bus->txminmax = BRCMF_TXMINMAX;
3855 bus->tx_seq = SDPCM_SEQ_WRAP - 1;
3856
3857 INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
3858 bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");
3859 if (bus->brcmf_wq == NULL) {
3860 brcmf_err("insufficient memory to create txworkqueue\n");
3861 goto fail;
3862 }
3863
3864 /* attempt to attach to the dongle */
3865 if (!(brcmf_sdbrcm_probe_attach(bus, regsva))) {
3866 brcmf_err("brcmf_sdbrcm_probe_attach failed\n");
3867 goto fail;
3868 }
3869
3870 spin_lock_init(&bus->rxctl_lock);
3871 spin_lock_init(&bus->txqlock);
3872 init_waitqueue_head(&bus->ctrl_wait);
3873 init_waitqueue_head(&bus->dcmd_resp_wait);
3874
3875 /* Set up the watchdog timer */
3876 init_timer(&bus->timer);
3877 bus->timer.data = (unsigned long)bus;
3878 bus->timer.function = brcmf_sdbrcm_watchdog;
3879
3880 /* Initialize watchdog thread */
3881 init_completion(&bus->watchdog_wait);
3882 bus->watchdog_tsk = kthread_run(brcmf_sdbrcm_watchdog_thread,
3883 bus, "brcmf_watchdog");
3884 if (IS_ERR(bus->watchdog_tsk)) {
3885 pr_warn("brcmf_watchdog thread failed to start\n");
3886 bus->watchdog_tsk = NULL;
3887 }
3888 /* Initialize DPC thread */
3889 atomic_set(&bus->dpc_tskcnt, 0);
3890
3891 /* Assign bus interface call back */
3892 bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
3893 bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops;
3894 bus->sdiodev->bus_if->chip = bus->ci->chip;
3895 bus->sdiodev->bus_if->chiprev = bus->ci->chiprev;
3896
3897 /* default sdio bus header length for tx packet */
3898 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
3899
3900 /* Attach to the common layer, reserve hdr space */
3901 ret = brcmf_attach(bus->tx_hdrlen, bus->sdiodev->dev);
3902 if (ret != 0) {
3903 brcmf_err("brcmf_attach failed\n");
3904 goto fail;
3905 }
3906
3907 /* Allocate buffers */
3908 if (!(brcmf_sdbrcm_probe_malloc(bus))) {
3909 brcmf_err("brcmf_sdbrcm_probe_malloc failed\n");
3910 goto fail;
3911 }
3912
3913 if (!(brcmf_sdbrcm_probe_init(bus))) {
3914 brcmf_err("brcmf_sdbrcm_probe_init failed\n");
3915 goto fail;
3916 }
3917
3918 brcmf_sdio_debugfs_create(bus);
3919 brcmf_dbg(INFO, "completed!!\n");
3920
3921 /* sdio bus core specific dcmd */
3922 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
3923 dlst = kzalloc(sizeof(struct brcmf_bus_dcmd), GFP_KERNEL);
3924 if (dlst) {
3925 if (bus->ci->c_inf[idx].rev < 12) {
3926 /* for sdio core rev < 12, disable txgloming */
3927 dngl_txglom = 0;
3928 dlst->name = "bus:txglom";
3929 dlst->param = (char *)&dngl_txglom;
3930 dlst->param_len = sizeof(u32);
3931 } else {
3932 /* otherwise, set txglomalign */
3933 if (sdiodev->pdata)
3934 txglomalign = sdiodev->pdata->sd_sgentry_align;
3935 /* SDIO ADMA requires at least 32 bit alignment */
3936 if (txglomalign < 4)
3937 txglomalign = 4;
3938 dlst->name = "bus:txglomalign";
3939 dlst->param = (char *)&txglomalign;
3940 dlst->param_len = sizeof(u32);
3941 }
3942 list_add(&dlst->list, &bus->sdiodev->bus_if->dcmd_list);
3943 }
3944
3945 /* if firmware path present try to download and bring up bus */
3946 ret = brcmf_bus_start(bus->sdiodev->dev);
3947 if (ret != 0) {
3948 brcmf_err("dongle is not responding\n");
3949 goto fail;
3950 }
3951
3952 return bus;
3953
3954 fail:
3955 brcmf_sdbrcm_release(bus);
3956 return NULL;
3957 }
3958
3959 void brcmf_sdbrcm_disconnect(void *ptr)
3960 {
3961 struct brcmf_sdio *bus = (struct brcmf_sdio *)ptr;
3962
3963 brcmf_dbg(TRACE, "Enter\n");
3964
3965 if (bus)
3966 brcmf_sdbrcm_release(bus);
3967
3968 brcmf_dbg(TRACE, "Disconnected\n");
3969 }
3970
3971 void
3972 brcmf_sdbrcm_wd_timer(struct brcmf_sdio *bus, uint wdtick)
3973 {
3974 /* Totally stop the timer */
3975 if (!wdtick && bus->wd_timer_valid) {
3976 del_timer_sync(&bus->timer);
3977 bus->wd_timer_valid = false;
3978 bus->save_ms = wdtick;
3979 return;
3980 }
3981
3982 /* don't start the wd until fw is loaded */
3983 if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN)
3984 return;
3985
3986 if (wdtick) {
3987 if (bus->save_ms != BRCMF_WD_POLL_MS) {
3988 if (bus->wd_timer_valid)
3989 /* Stop timer and restart at new value */
3990 del_timer_sync(&bus->timer);
3991
3992 /* Create timer again when watchdog period is
3993 dynamically changed or in the first instance
3994 */
3995 bus->timer.expires =
3996 jiffies + BRCMF_WD_POLL_MS * HZ / 1000;
3997 add_timer(&bus->timer);
3998
3999 } else {
4000 /* Re arm the timer, at last watchdog period */
4001 mod_timer(&bus->timer,
4002 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
4003 }
4004
4005 bus->wd_timer_valid = true;
4006 bus->save_ms = wdtick;
4007 }
4008 }
Linux kernel - Deliverables
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