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Merge remote-tracking branch 'iommu/next'
[deliverable/linux.git] / drivers / net / wireless / broadcom / brcm80211 / brcmfmac / 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/atomic.h>
19 #include <linux/kernel.h>
20 #include <linux/kthread.h>
21 #include <linux/printk.h>
22 #include <linux/pci_ids.h>
23 #include <linux/netdevice.h>
24 #include <linux/interrupt.h>
25 #include <linux/sched.h>
26 #include <linux/mmc/sdio.h>
27 #include <linux/mmc/sdio_ids.h>
28 #include <linux/mmc/sdio_func.h>
29 #include <linux/mmc/card.h>
30 #include <linux/semaphore.h>
31 #include <linux/firmware.h>
32 #include <linux/module.h>
33 #include <linux/bcma/bcma.h>
34 #include <linux/debugfs.h>
35 #include <linux/vmalloc.h>
36 #include <asm/unaligned.h>
37 #include <defs.h>
38 #include <brcmu_wifi.h>
39 #include <brcmu_utils.h>
40 #include <brcm_hw_ids.h>
41 #include <soc.h>
42 #include "sdio.h"
43 #include "chip.h"
44 #include "firmware.h"
45 #include "core.h"
46 #include "common.h"
47
48 #define DCMD_RESP_TIMEOUT msecs_to_jiffies(2500)
49 #define CTL_DONE_TIMEOUT msecs_to_jiffies(2500)
50
51 #ifdef DEBUG
52
53 #define BRCMF_TRAP_INFO_SIZE 80
54
55 #define CBUF_LEN (128)
56
57 /* Device console log buffer state */
58 #define CONSOLE_BUFFER_MAX 2024
59
60 struct rte_log_le {
61 __le32 buf; /* Can't be pointer on (64-bit) hosts */
62 __le32 buf_size;
63 __le32 idx;
64 char *_buf_compat; /* Redundant pointer for backward compat. */
65 };
66
67 struct rte_console {
68 /* Virtual UART
69 * When there is no UART (e.g. Quickturn),
70 * the host should write a complete
71 * input line directly into cbuf and then write
72 * the length into vcons_in.
73 * This may also be used when there is a real UART
74 * (at risk of conflicting with
75 * the real UART). vcons_out is currently unused.
76 */
77 uint vcons_in;
78 uint vcons_out;
79
80 /* Output (logging) buffer
81 * Console output is written to a ring buffer log_buf at index log_idx.
82 * The host may read the output when it sees log_idx advance.
83 * Output will be lost if the output wraps around faster than the host
84 * polls.
85 */
86 struct rte_log_le log_le;
87
88 /* Console input line buffer
89 * Characters are read one at a time into cbuf
90 * until <CR> is received, then
91 * the buffer is processed as a command line.
92 * Also used for virtual UART.
93 */
94 uint cbuf_idx;
95 char cbuf[CBUF_LEN];
96 };
97
98 #endif /* DEBUG */
99 #include <chipcommon.h>
100
101 #include "bus.h"
102 #include "debug.h"
103 #include "tracepoint.h"
104
105 #define TXQLEN 2048 /* bulk tx queue length */
106 #define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */
107 #define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */
108 #define PRIOMASK 7
109
110 #define TXRETRIES 2 /* # of retries for tx frames */
111
112 #define BRCMF_RXBOUND 50 /* Default for max rx frames in
113 one scheduling */
114
115 #define BRCMF_TXBOUND 20 /* Default for max tx frames in
116 one scheduling */
117
118 #define BRCMF_TXMINMAX 1 /* Max tx frames if rx still pending */
119
120 #define MEMBLOCK 2048 /* Block size used for downloading
121 of dongle image */
122 #define MAX_DATA_BUF (32 * 1024) /* Must be large enough to hold
123 biggest possible glom */
124
125 #define BRCMF_FIRSTREAD (1 << 6)
126
127 #define BRCMF_CONSOLE 10 /* watchdog interval to poll console */
128
129 /* SBSDIO_DEVICE_CTL */
130
131 /* 1: device will assert busy signal when receiving CMD53 */
132 #define SBSDIO_DEVCTL_SETBUSY 0x01
133 /* 1: assertion of sdio interrupt is synchronous to the sdio clock */
134 #define SBSDIO_DEVCTL_SPI_INTR_SYNC 0x02
135 /* 1: mask all interrupts to host except the chipActive (rev 8) */
136 #define SBSDIO_DEVCTL_CA_INT_ONLY 0x04
137 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
138 * sdio bus power cycle to clear (rev 9) */
139 #define SBSDIO_DEVCTL_PADS_ISO 0x08
140 /* Force SD->SB reset mapping (rev 11) */
141 #define SBSDIO_DEVCTL_SB_RST_CTL 0x30
142 /* Determined by CoreControl bit */
143 #define SBSDIO_DEVCTL_RST_CORECTL 0x00
144 /* Force backplane reset */
145 #define SBSDIO_DEVCTL_RST_BPRESET 0x10
146 /* Force no backplane reset */
147 #define SBSDIO_DEVCTL_RST_NOBPRESET 0x20
148
149 /* direct(mapped) cis space */
150
151 /* MAPPED common CIS address */
152 #define SBSDIO_CIS_BASE_COMMON 0x1000
153 /* maximum bytes in one CIS */
154 #define SBSDIO_CIS_SIZE_LIMIT 0x200
155 /* cis offset addr is < 17 bits */
156 #define SBSDIO_CIS_OFT_ADDR_MASK 0x1FFFF
157
158 /* manfid tuple length, include tuple, link bytes */
159 #define SBSDIO_CIS_MANFID_TUPLE_LEN 6
160
161 #define CORE_BUS_REG(base, field) \
162 (base + offsetof(struct sdpcmd_regs, field))
163
164 /* SDIO function 1 register CHIPCLKCSR */
165 /* Force ALP request to backplane */
166 #define SBSDIO_FORCE_ALP 0x01
167 /* Force HT request to backplane */
168 #define SBSDIO_FORCE_HT 0x02
169 /* Force ILP request to backplane */
170 #define SBSDIO_FORCE_ILP 0x04
171 /* Make ALP ready (power up xtal) */
172 #define SBSDIO_ALP_AVAIL_REQ 0x08
173 /* Make HT ready (power up PLL) */
174 #define SBSDIO_HT_AVAIL_REQ 0x10
175 /* Squelch clock requests from HW */
176 #define SBSDIO_FORCE_HW_CLKREQ_OFF 0x20
177 /* Status: ALP is ready */
178 #define SBSDIO_ALP_AVAIL 0x40
179 /* Status: HT is ready */
180 #define SBSDIO_HT_AVAIL 0x80
181 #define SBSDIO_CSR_MASK 0x1F
182 #define SBSDIO_AVBITS (SBSDIO_HT_AVAIL | SBSDIO_ALP_AVAIL)
183 #define SBSDIO_ALPAV(regval) ((regval) & SBSDIO_AVBITS)
184 #define SBSDIO_HTAV(regval) (((regval) & SBSDIO_AVBITS) == SBSDIO_AVBITS)
185 #define SBSDIO_ALPONLY(regval) (SBSDIO_ALPAV(regval) && !SBSDIO_HTAV(regval))
186 #define SBSDIO_CLKAV(regval, alponly) \
187 (SBSDIO_ALPAV(regval) && (alponly ? 1 : SBSDIO_HTAV(regval)))
188
189 /* intstatus */
190 #define I_SMB_SW0 (1 << 0) /* To SB Mail S/W interrupt 0 */
191 #define I_SMB_SW1 (1 << 1) /* To SB Mail S/W interrupt 1 */
192 #define I_SMB_SW2 (1 << 2) /* To SB Mail S/W interrupt 2 */
193 #define I_SMB_SW3 (1 << 3) /* To SB Mail S/W interrupt 3 */
194 #define I_SMB_SW_MASK 0x0000000f /* To SB Mail S/W interrupts mask */
195 #define I_SMB_SW_SHIFT 0 /* To SB Mail S/W interrupts shift */
196 #define I_HMB_SW0 (1 << 4) /* To Host Mail S/W interrupt 0 */
197 #define I_HMB_SW1 (1 << 5) /* To Host Mail S/W interrupt 1 */
198 #define I_HMB_SW2 (1 << 6) /* To Host Mail S/W interrupt 2 */
199 #define I_HMB_SW3 (1 << 7) /* To Host Mail S/W interrupt 3 */
200 #define I_HMB_SW_MASK 0x000000f0 /* To Host Mail S/W interrupts mask */
201 #define I_HMB_SW_SHIFT 4 /* To Host Mail S/W interrupts shift */
202 #define I_WR_OOSYNC (1 << 8) /* Write Frame Out Of Sync */
203 #define I_RD_OOSYNC (1 << 9) /* Read Frame Out Of Sync */
204 #define I_PC (1 << 10) /* descriptor error */
205 #define I_PD (1 << 11) /* data error */
206 #define I_DE (1 << 12) /* Descriptor protocol Error */
207 #define I_RU (1 << 13) /* Receive descriptor Underflow */
208 #define I_RO (1 << 14) /* Receive fifo Overflow */
209 #define I_XU (1 << 15) /* Transmit fifo Underflow */
210 #define I_RI (1 << 16) /* Receive Interrupt */
211 #define I_BUSPWR (1 << 17) /* SDIO Bus Power Change (rev 9) */
212 #define I_XMTDATA_AVAIL (1 << 23) /* bits in fifo */
213 #define I_XI (1 << 24) /* Transmit Interrupt */
214 #define I_RF_TERM (1 << 25) /* Read Frame Terminate */
215 #define I_WF_TERM (1 << 26) /* Write Frame Terminate */
216 #define I_PCMCIA_XU (1 << 27) /* PCMCIA Transmit FIFO Underflow */
217 #define I_SBINT (1 << 28) /* sbintstatus Interrupt */
218 #define I_CHIPACTIVE (1 << 29) /* chip from doze to active state */
219 #define I_SRESET (1 << 30) /* CCCR RES interrupt */
220 #define I_IOE2 (1U << 31) /* CCCR IOE2 Bit Changed */
221 #define I_ERRORS (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
222 #define I_DMA (I_RI | I_XI | I_ERRORS)
223
224 /* corecontrol */
225 #define CC_CISRDY (1 << 0) /* CIS Ready */
226 #define CC_BPRESEN (1 << 1) /* CCCR RES signal */
227 #define CC_F2RDY (1 << 2) /* set CCCR IOR2 bit */
228 #define CC_CLRPADSISO (1 << 3) /* clear SDIO pads isolation */
229 #define CC_XMTDATAAVAIL_MODE (1 << 4)
230 #define CC_XMTDATAAVAIL_CTRL (1 << 5)
231
232 /* SDA_FRAMECTRL */
233 #define SFC_RF_TERM (1 << 0) /* Read Frame Terminate */
234 #define SFC_WF_TERM (1 << 1) /* Write Frame Terminate */
235 #define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */
236 #define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */
237
238 /*
239 * Software allocation of To SB Mailbox resources
240 */
241
242 /* tosbmailbox bits corresponding to intstatus bits */
243 #define SMB_NAK (1 << 0) /* Frame NAK */
244 #define SMB_INT_ACK (1 << 1) /* Host Interrupt ACK */
245 #define SMB_USE_OOB (1 << 2) /* Use OOB Wakeup */
246 #define SMB_DEV_INT (1 << 3) /* Miscellaneous Interrupt */
247
248 /* tosbmailboxdata */
249 #define SMB_DATA_VERSION_SHIFT 16 /* host protocol version */
250
251 /*
252 * Software allocation of To Host Mailbox resources
253 */
254
255 /* intstatus bits */
256 #define I_HMB_FC_STATE I_HMB_SW0 /* Flow Control State */
257 #define I_HMB_FC_CHANGE I_HMB_SW1 /* Flow Control State Changed */
258 #define I_HMB_FRAME_IND I_HMB_SW2 /* Frame Indication */
259 #define I_HMB_HOST_INT I_HMB_SW3 /* Miscellaneous Interrupt */
260
261 /* tohostmailboxdata */
262 #define HMB_DATA_NAKHANDLED 1 /* retransmit NAK'd frame */
263 #define HMB_DATA_DEVREADY 2 /* talk to host after enable */
264 #define HMB_DATA_FC 4 /* per prio flowcontrol update flag */
265 #define HMB_DATA_FWREADY 8 /* fw ready for protocol activity */
266
267 #define HMB_DATA_FCDATA_MASK 0xff000000
268 #define HMB_DATA_FCDATA_SHIFT 24
269
270 #define HMB_DATA_VERSION_MASK 0x00ff0000
271 #define HMB_DATA_VERSION_SHIFT 16
272
273 /*
274 * Software-defined protocol header
275 */
276
277 /* Current protocol version */
278 #define SDPCM_PROT_VERSION 4
279
280 /*
281 * Shared structure between dongle and the host.
282 * The structure contains pointers to trap or assert information.
283 */
284 #define SDPCM_SHARED_VERSION 0x0003
285 #define SDPCM_SHARED_VERSION_MASK 0x00FF
286 #define SDPCM_SHARED_ASSERT_BUILT 0x0100
287 #define SDPCM_SHARED_ASSERT 0x0200
288 #define SDPCM_SHARED_TRAP 0x0400
289
290 /* Space for header read, limit for data packets */
291 #define MAX_HDR_READ (1 << 6)
292 #define MAX_RX_DATASZ 2048
293
294 /* Bump up limit on waiting for HT to account for first startup;
295 * if the image is doing a CRC calculation before programming the PMU
296 * for HT availability, it could take a couple hundred ms more, so
297 * max out at a 1 second (1000000us).
298 */
299 #undef PMU_MAX_TRANSITION_DLY
300 #define PMU_MAX_TRANSITION_DLY 1000000
301
302 /* Value for ChipClockCSR during initial setup */
303 #define BRCMF_INIT_CLKCTL1 (SBSDIO_FORCE_HW_CLKREQ_OFF | \
304 SBSDIO_ALP_AVAIL_REQ)
305
306 /* Flags for SDH calls */
307 #define F2SYNC (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
308
309 #define BRCMF_IDLE_ACTIVE 0 /* Do not request any SD clock change
310 * when idle
311 */
312 #define BRCMF_IDLE_INTERVAL 1
313
314 #define KSO_WAIT_US 50
315 #define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US)
316 #define BRCMF_SDIO_MAX_ACCESS_ERRORS 5
317
318 /*
319 * Conversion of 802.1D priority to precedence level
320 */
321 static uint prio2prec(u32 prio)
322 {
323 return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
324 (prio^2) : prio;
325 }
326
327 #ifdef DEBUG
328 /* Device console log buffer state */
329 struct brcmf_console {
330 uint count; /* Poll interval msec counter */
331 uint log_addr; /* Log struct address (fixed) */
332 struct rte_log_le log_le; /* Log struct (host copy) */
333 uint bufsize; /* Size of log buffer */
334 u8 *buf; /* Log buffer (host copy) */
335 uint last; /* Last buffer read index */
336 };
337
338 struct brcmf_trap_info {
339 __le32 type;
340 __le32 epc;
341 __le32 cpsr;
342 __le32 spsr;
343 __le32 r0; /* a1 */
344 __le32 r1; /* a2 */
345 __le32 r2; /* a3 */
346 __le32 r3; /* a4 */
347 __le32 r4; /* v1 */
348 __le32 r5; /* v2 */
349 __le32 r6; /* v3 */
350 __le32 r7; /* v4 */
351 __le32 r8; /* v5 */
352 __le32 r9; /* sb/v6 */
353 __le32 r10; /* sl/v7 */
354 __le32 r11; /* fp/v8 */
355 __le32 r12; /* ip */
356 __le32 r13; /* sp */
357 __le32 r14; /* lr */
358 __le32 pc; /* r15 */
359 };
360 #endif /* DEBUG */
361
362 struct sdpcm_shared {
363 u32 flags;
364 u32 trap_addr;
365 u32 assert_exp_addr;
366 u32 assert_file_addr;
367 u32 assert_line;
368 u32 console_addr; /* Address of struct rte_console */
369 u32 msgtrace_addr;
370 u8 tag[32];
371 u32 brpt_addr;
372 };
373
374 struct sdpcm_shared_le {
375 __le32 flags;
376 __le32 trap_addr;
377 __le32 assert_exp_addr;
378 __le32 assert_file_addr;
379 __le32 assert_line;
380 __le32 console_addr; /* Address of struct rte_console */
381 __le32 msgtrace_addr;
382 u8 tag[32];
383 __le32 brpt_addr;
384 };
385
386 /* dongle SDIO bus specific header info */
387 struct brcmf_sdio_hdrinfo {
388 u8 seq_num;
389 u8 channel;
390 u16 len;
391 u16 len_left;
392 u16 len_nxtfrm;
393 u8 dat_offset;
394 bool lastfrm;
395 u16 tail_pad;
396 };
397
398 /*
399 * hold counter variables
400 */
401 struct brcmf_sdio_count {
402 uint intrcount; /* Count of device interrupt callbacks */
403 uint lastintrs; /* Count as of last watchdog timer */
404 uint pollcnt; /* Count of active polls */
405 uint regfails; /* Count of R_REG failures */
406 uint tx_sderrs; /* Count of tx attempts with sd errors */
407 uint fcqueued; /* Tx packets that got queued */
408 uint rxrtx; /* Count of rtx requests (NAK to dongle) */
409 uint rx_toolong; /* Receive frames too long to receive */
410 uint rxc_errors; /* SDIO errors when reading control frames */
411 uint rx_hdrfail; /* SDIO errors on header reads */
412 uint rx_badhdr; /* Bad received headers (roosync?) */
413 uint rx_badseq; /* Mismatched rx sequence number */
414 uint fc_rcvd; /* Number of flow-control events received */
415 uint fc_xoff; /* Number which turned on flow-control */
416 uint fc_xon; /* Number which turned off flow-control */
417 uint rxglomfail; /* Failed deglom attempts */
418 uint rxglomframes; /* Number of glom frames (superframes) */
419 uint rxglompkts; /* Number of packets from glom frames */
420 uint f2rxhdrs; /* Number of header reads */
421 uint f2rxdata; /* Number of frame data reads */
422 uint f2txdata; /* Number of f2 frame writes */
423 uint f1regdata; /* Number of f1 register accesses */
424 uint tickcnt; /* Number of watchdog been schedule */
425 ulong tx_ctlerrs; /* Err of sending ctrl frames */
426 ulong tx_ctlpkts; /* Ctrl frames sent to dongle */
427 ulong rx_ctlerrs; /* Err of processing rx ctrl frames */
428 ulong rx_ctlpkts; /* Ctrl frames processed from dongle */
429 ulong rx_readahead_cnt; /* packets where header read-ahead was used */
430 };
431
432 /* misc chip info needed by some of the routines */
433 /* Private data for SDIO bus interaction */
434 struct brcmf_sdio {
435 struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
436 struct brcmf_chip *ci; /* Chip info struct */
437
438 u32 hostintmask; /* Copy of Host Interrupt Mask */
439 atomic_t intstatus; /* Intstatus bits (events) pending */
440 atomic_t fcstate; /* State of dongle flow-control */
441
442 uint blocksize; /* Block size of SDIO transfers */
443 uint roundup; /* Max roundup limit */
444
445 struct pktq txq; /* Queue length used for flow-control */
446 u8 flowcontrol; /* per prio flow control bitmask */
447 u8 tx_seq; /* Transmit sequence number (next) */
448 u8 tx_max; /* Maximum transmit sequence allowed */
449
450 u8 *hdrbuf; /* buffer for handling rx frame */
451 u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */
452 u8 rx_seq; /* Receive sequence number (expected) */
453 struct brcmf_sdio_hdrinfo cur_read;
454 /* info of current read frame */
455 bool rxskip; /* Skip receive (awaiting NAK ACK) */
456 bool rxpending; /* Data frame pending in dongle */
457
458 uint rxbound; /* Rx frames to read before resched */
459 uint txbound; /* Tx frames to send before resched */
460 uint txminmax;
461
462 struct sk_buff *glomd; /* Packet containing glomming descriptor */
463 struct sk_buff_head glom; /* Packet list for glommed superframe */
464
465 u8 *rxbuf; /* Buffer for receiving control packets */
466 uint rxblen; /* Allocated length of rxbuf */
467 u8 *rxctl; /* Aligned pointer into rxbuf */
468 u8 *rxctl_orig; /* pointer for freeing rxctl */
469 uint rxlen; /* Length of valid data in buffer */
470 spinlock_t rxctl_lock; /* protection lock for ctrl frame resources */
471
472 u8 sdpcm_ver; /* Bus protocol reported by dongle */
473
474 bool intr; /* Use interrupts */
475 bool poll; /* Use polling */
476 atomic_t ipend; /* Device interrupt is pending */
477 uint spurious; /* Count of spurious interrupts */
478 uint pollrate; /* Ticks between device polls */
479 uint polltick; /* Tick counter */
480
481 #ifdef DEBUG
482 uint console_interval;
483 struct brcmf_console console; /* Console output polling support */
484 uint console_addr; /* Console address from shared struct */
485 #endif /* DEBUG */
486
487 uint clkstate; /* State of sd and backplane clock(s) */
488 s32 idletime; /* Control for activity timeout */
489 s32 idlecount; /* Activity timeout counter */
490 s32 idleclock; /* How to set bus driver when idle */
491 bool rxflow_mode; /* Rx flow control mode */
492 bool rxflow; /* Is rx flow control on */
493 bool alp_only; /* Don't use HT clock (ALP only) */
494
495 u8 *ctrl_frame_buf;
496 u16 ctrl_frame_len;
497 bool ctrl_frame_stat;
498 int ctrl_frame_err;
499
500 spinlock_t txq_lock; /* protect bus->txq */
501 wait_queue_head_t ctrl_wait;
502 wait_queue_head_t dcmd_resp_wait;
503
504 struct timer_list timer;
505 struct completion watchdog_wait;
506 struct task_struct *watchdog_tsk;
507 bool wd_active;
508
509 struct workqueue_struct *brcmf_wq;
510 struct work_struct datawork;
511 bool dpc_triggered;
512 bool dpc_running;
513
514 bool txoff; /* Transmit flow-controlled */
515 struct brcmf_sdio_count sdcnt;
516 bool sr_enabled; /* SaveRestore enabled */
517 bool sleeping;
518
519 u8 tx_hdrlen; /* sdio bus header length for tx packet */
520 bool txglom; /* host tx glomming enable flag */
521 u16 head_align; /* buffer pointer alignment */
522 u16 sgentry_align; /* scatter-gather buffer alignment */
523 };
524
525 /* clkstate */
526 #define CLK_NONE 0
527 #define CLK_SDONLY 1
528 #define CLK_PENDING 2
529 #define CLK_AVAIL 3
530
531 #ifdef DEBUG
532 static int qcount[NUMPRIO];
533 #endif /* DEBUG */
534
535 #define DEFAULT_SDIO_DRIVE_STRENGTH 6 /* in milliamps */
536
537 #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
538
539 /* Limit on rounding up frames */
540 static const uint max_roundup = 512;
541
542 #define ALIGNMENT 4
543
544 enum brcmf_sdio_frmtype {
545 BRCMF_SDIO_FT_NORMAL,
546 BRCMF_SDIO_FT_SUPER,
547 BRCMF_SDIO_FT_SUB,
548 };
549
550 #define SDIOD_DRVSTR_KEY(chip, pmu) (((chip) << 16) | (pmu))
551
552 /* SDIO Pad drive strength to select value mappings */
553 struct sdiod_drive_str {
554 u8 strength; /* Pad Drive Strength in mA */
555 u8 sel; /* Chip-specific select value */
556 };
557
558 /* SDIO Drive Strength to sel value table for PMU Rev 11 (1.8V) */
559 static const struct sdiod_drive_str sdiod_drvstr_tab1_1v8[] = {
560 {32, 0x6},
561 {26, 0x7},
562 {22, 0x4},
563 {16, 0x5},
564 {12, 0x2},
565 {8, 0x3},
566 {4, 0x0},
567 {0, 0x1}
568 };
569
570 /* SDIO Drive Strength to sel value table for PMU Rev 13 (1.8v) */
571 static const struct sdiod_drive_str sdiod_drive_strength_tab5_1v8[] = {
572 {6, 0x7},
573 {5, 0x6},
574 {4, 0x5},
575 {3, 0x4},
576 {2, 0x2},
577 {1, 0x1},
578 {0, 0x0}
579 };
580
581 /* SDIO Drive Strength to sel value table for PMU Rev 17 (1.8v) */
582 static const struct sdiod_drive_str sdiod_drvstr_tab6_1v8[] = {
583 {3, 0x3},
584 {2, 0x2},
585 {1, 0x1},
586 {0, 0x0} };
587
588 /* SDIO Drive Strength to sel value table for 43143 PMU Rev 17 (3.3V) */
589 static const struct sdiod_drive_str sdiod_drvstr_tab2_3v3[] = {
590 {16, 0x7},
591 {12, 0x5},
592 {8, 0x3},
593 {4, 0x1}
594 };
595
596 BRCMF_FW_NVRAM_DEF(43143, "brcmfmac43143-sdio.bin", "brcmfmac43143-sdio.txt");
597 BRCMF_FW_NVRAM_DEF(43241B0, "brcmfmac43241b0-sdio.bin",
598 "brcmfmac43241b0-sdio.txt");
599 BRCMF_FW_NVRAM_DEF(43241B4, "brcmfmac43241b4-sdio.bin",
600 "brcmfmac43241b4-sdio.txt");
601 BRCMF_FW_NVRAM_DEF(43241B5, "brcmfmac43241b5-sdio.bin",
602 "brcmfmac43241b5-sdio.txt");
603 BRCMF_FW_NVRAM_DEF(4329, "brcmfmac4329-sdio.bin", "brcmfmac4329-sdio.txt");
604 BRCMF_FW_NVRAM_DEF(4330, "brcmfmac4330-sdio.bin", "brcmfmac4330-sdio.txt");
605 BRCMF_FW_NVRAM_DEF(4334, "brcmfmac4334-sdio.bin", "brcmfmac4334-sdio.txt");
606 BRCMF_FW_NVRAM_DEF(43340, "brcmfmac43340-sdio.bin", "brcmfmac43340-sdio.txt");
607 BRCMF_FW_NVRAM_DEF(4335, "brcmfmac4335-sdio.bin", "brcmfmac4335-sdio.txt");
608 BRCMF_FW_NVRAM_DEF(43362, "brcmfmac43362-sdio.bin", "brcmfmac43362-sdio.txt");
609 BRCMF_FW_NVRAM_DEF(4339, "brcmfmac4339-sdio.bin", "brcmfmac4339-sdio.txt");
610 BRCMF_FW_NVRAM_DEF(43430, "brcmfmac43430-sdio.bin", "brcmfmac43430-sdio.txt");
611 BRCMF_FW_NVRAM_DEF(43455, "brcmfmac43455-sdio.bin", "brcmfmac43455-sdio.txt");
612 BRCMF_FW_NVRAM_DEF(4354, "brcmfmac4354-sdio.bin", "brcmfmac4354-sdio.txt");
613 BRCMF_FW_NVRAM_DEF(4356, "brcmfmac4356-sdio.bin", "brcmfmac4356-sdio.txt");
614
615 static struct brcmf_firmware_mapping brcmf_sdio_fwnames[] = {
616 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143),
617 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43241_CHIP_ID, 0x0000001F, 43241B0),
618 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43241_CHIP_ID, 0x00000020, 43241B4),
619 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43241_CHIP_ID, 0xFFFFFFC0, 43241B5),
620 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4329_CHIP_ID, 0xFFFFFFFF, 4329),
621 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4330_CHIP_ID, 0xFFFFFFFF, 4330),
622 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4334_CHIP_ID, 0xFFFFFFFF, 4334),
623 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43340_CHIP_ID, 0xFFFFFFFF, 43340),
624 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4335_CHIP_ID, 0xFFFFFFFF, 4335),
625 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43362_CHIP_ID, 0xFFFFFFFE, 43362),
626 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4339_CHIP_ID, 0xFFFFFFFF, 4339),
627 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43430_CHIP_ID, 0xFFFFFFFF, 43430),
628 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4345_CHIP_ID, 0xFFFFFFC0, 43455),
629 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4354_CHIP_ID, 0xFFFFFFFF, 4354),
630 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4356_CHIP_ID, 0xFFFFFFFF, 4356)
631 };
632
633 static void pkt_align(struct sk_buff *p, int len, int align)
634 {
635 uint datalign;
636 datalign = (unsigned long)(p->data);
637 datalign = roundup(datalign, (align)) - datalign;
638 if (datalign)
639 skb_pull(p, datalign);
640 __skb_trim(p, len);
641 }
642
643 /* To check if there's window offered */
644 static bool data_ok(struct brcmf_sdio *bus)
645 {
646 return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
647 ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
648 }
649
650 /*
651 * Reads a register in the SDIO hardware block. This block occupies a series of
652 * adresses on the 32 bit backplane bus.
653 */
654 static int r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset)
655 {
656 struct brcmf_core *core;
657 int ret;
658
659 core = brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV);
660 *regvar = brcmf_sdiod_regrl(bus->sdiodev, core->base + offset, &ret);
661
662 return ret;
663 }
664
665 static int w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
666 {
667 struct brcmf_core *core;
668 int ret;
669
670 core = brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV);
671 brcmf_sdiod_regwl(bus->sdiodev, core->base + reg_offset, regval, &ret);
672
673 return ret;
674 }
675
676 static int
677 brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on)
678 {
679 u8 wr_val = 0, rd_val, cmp_val, bmask;
680 int err = 0;
681 int err_cnt = 0;
682 int try_cnt = 0;
683
684 brcmf_dbg(TRACE, "Enter: on=%d\n", on);
685
686 wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
687 /* 1st KSO write goes to AOS wake up core if device is asleep */
688 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
689 wr_val, &err);
690
691 if (on) {
692 /* device WAKEUP through KSO:
693 * write bit 0 & read back until
694 * both bits 0 (kso bit) & 1 (dev on status) are set
695 */
696 cmp_val = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK |
697 SBSDIO_FUNC1_SLEEPCSR_DEVON_MASK;
698 bmask = cmp_val;
699 usleep_range(2000, 3000);
700 } else {
701 /* Put device to sleep, turn off KSO */
702 cmp_val = 0;
703 /* only check for bit0, bit1(dev on status) may not
704 * get cleared right away
705 */
706 bmask = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK;
707 }
708
709 do {
710 /* reliable KSO bit set/clr:
711 * the sdiod sleep write access is synced to PMU 32khz clk
712 * just one write attempt may fail,
713 * read it back until it matches written value
714 */
715 rd_val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
716 &err);
717 if (!err) {
718 if ((rd_val & bmask) == cmp_val)
719 break;
720 err_cnt = 0;
721 }
722 /* bail out upon subsequent access errors */
723 if (err && (err_cnt++ > BRCMF_SDIO_MAX_ACCESS_ERRORS))
724 break;
725 udelay(KSO_WAIT_US);
726 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
727 wr_val, &err);
728 } while (try_cnt++ < MAX_KSO_ATTEMPTS);
729
730 if (try_cnt > 2)
731 brcmf_dbg(SDIO, "try_cnt=%d rd_val=0x%x err=%d\n", try_cnt,
732 rd_val, err);
733
734 if (try_cnt > MAX_KSO_ATTEMPTS)
735 brcmf_err("max tries: rd_val=0x%x err=%d\n", rd_val, err);
736
737 return err;
738 }
739
740 #define HOSTINTMASK (I_HMB_SW_MASK | I_CHIPACTIVE)
741
742 /* Turn backplane clock on or off */
743 static int brcmf_sdio_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
744 {
745 int err;
746 u8 clkctl, clkreq, devctl;
747 unsigned long timeout;
748
749 brcmf_dbg(SDIO, "Enter\n");
750
751 clkctl = 0;
752
753 if (bus->sr_enabled) {
754 bus->clkstate = (on ? CLK_AVAIL : CLK_SDONLY);
755 return 0;
756 }
757
758 if (on) {
759 /* Request HT Avail */
760 clkreq =
761 bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
762
763 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
764 clkreq, &err);
765 if (err) {
766 brcmf_err("HT Avail request error: %d\n", err);
767 return -EBADE;
768 }
769
770 /* Check current status */
771 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
772 SBSDIO_FUNC1_CHIPCLKCSR, &err);
773 if (err) {
774 brcmf_err("HT Avail read error: %d\n", err);
775 return -EBADE;
776 }
777
778 /* Go to pending and await interrupt if appropriate */
779 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
780 /* Allow only clock-available interrupt */
781 devctl = brcmf_sdiod_regrb(bus->sdiodev,
782 SBSDIO_DEVICE_CTL, &err);
783 if (err) {
784 brcmf_err("Devctl error setting CA: %d\n",
785 err);
786 return -EBADE;
787 }
788
789 devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
790 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
791 devctl, &err);
792 brcmf_dbg(SDIO, "CLKCTL: set PENDING\n");
793 bus->clkstate = CLK_PENDING;
794
795 return 0;
796 } else if (bus->clkstate == CLK_PENDING) {
797 /* Cancel CA-only interrupt filter */
798 devctl = brcmf_sdiod_regrb(bus->sdiodev,
799 SBSDIO_DEVICE_CTL, &err);
800 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
801 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
802 devctl, &err);
803 }
804
805 /* Otherwise, wait here (polling) for HT Avail */
806 timeout = jiffies +
807 msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
808 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
809 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
810 SBSDIO_FUNC1_CHIPCLKCSR,
811 &err);
812 if (time_after(jiffies, timeout))
813 break;
814 else
815 usleep_range(5000, 10000);
816 }
817 if (err) {
818 brcmf_err("HT Avail request error: %d\n", err);
819 return -EBADE;
820 }
821 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
822 brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n",
823 PMU_MAX_TRANSITION_DLY, clkctl);
824 return -EBADE;
825 }
826
827 /* Mark clock available */
828 bus->clkstate = CLK_AVAIL;
829 brcmf_dbg(SDIO, "CLKCTL: turned ON\n");
830
831 #if defined(DEBUG)
832 if (!bus->alp_only) {
833 if (SBSDIO_ALPONLY(clkctl))
834 brcmf_err("HT Clock should be on\n");
835 }
836 #endif /* defined (DEBUG) */
837
838 } else {
839 clkreq = 0;
840
841 if (bus->clkstate == CLK_PENDING) {
842 /* Cancel CA-only interrupt filter */
843 devctl = brcmf_sdiod_regrb(bus->sdiodev,
844 SBSDIO_DEVICE_CTL, &err);
845 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
846 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
847 devctl, &err);
848 }
849
850 bus->clkstate = CLK_SDONLY;
851 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
852 clkreq, &err);
853 brcmf_dbg(SDIO, "CLKCTL: turned OFF\n");
854 if (err) {
855 brcmf_err("Failed access turning clock off: %d\n",
856 err);
857 return -EBADE;
858 }
859 }
860 return 0;
861 }
862
863 /* Change idle/active SD state */
864 static int brcmf_sdio_sdclk(struct brcmf_sdio *bus, bool on)
865 {
866 brcmf_dbg(SDIO, "Enter\n");
867
868 if (on)
869 bus->clkstate = CLK_SDONLY;
870 else
871 bus->clkstate = CLK_NONE;
872
873 return 0;
874 }
875
876 /* Transition SD and backplane clock readiness */
877 static int brcmf_sdio_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
878 {
879 #ifdef DEBUG
880 uint oldstate = bus->clkstate;
881 #endif /* DEBUG */
882
883 brcmf_dbg(SDIO, "Enter\n");
884
885 /* Early exit if we're already there */
886 if (bus->clkstate == target)
887 return 0;
888
889 switch (target) {
890 case CLK_AVAIL:
891 /* Make sure SD clock is available */
892 if (bus->clkstate == CLK_NONE)
893 brcmf_sdio_sdclk(bus, true);
894 /* Now request HT Avail on the backplane */
895 brcmf_sdio_htclk(bus, true, pendok);
896 break;
897
898 case CLK_SDONLY:
899 /* Remove HT request, or bring up SD clock */
900 if (bus->clkstate == CLK_NONE)
901 brcmf_sdio_sdclk(bus, true);
902 else if (bus->clkstate == CLK_AVAIL)
903 brcmf_sdio_htclk(bus, false, false);
904 else
905 brcmf_err("request for %d -> %d\n",
906 bus->clkstate, target);
907 break;
908
909 case CLK_NONE:
910 /* Make sure to remove HT request */
911 if (bus->clkstate == CLK_AVAIL)
912 brcmf_sdio_htclk(bus, false, false);
913 /* Now remove the SD clock */
914 brcmf_sdio_sdclk(bus, false);
915 break;
916 }
917 #ifdef DEBUG
918 brcmf_dbg(SDIO, "%d -> %d\n", oldstate, bus->clkstate);
919 #endif /* DEBUG */
920
921 return 0;
922 }
923
924 static int
925 brcmf_sdio_bus_sleep(struct brcmf_sdio *bus, bool sleep, bool pendok)
926 {
927 int err = 0;
928 u8 clkcsr;
929
930 brcmf_dbg(SDIO, "Enter: request %s currently %s\n",
931 (sleep ? "SLEEP" : "WAKE"),
932 (bus->sleeping ? "SLEEP" : "WAKE"));
933
934 /* If SR is enabled control bus state with KSO */
935 if (bus->sr_enabled) {
936 /* Done if we're already in the requested state */
937 if (sleep == bus->sleeping)
938 goto end;
939
940 /* Going to sleep */
941 if (sleep) {
942 clkcsr = brcmf_sdiod_regrb(bus->sdiodev,
943 SBSDIO_FUNC1_CHIPCLKCSR,
944 &err);
945 if ((clkcsr & SBSDIO_CSR_MASK) == 0) {
946 brcmf_dbg(SDIO, "no clock, set ALP\n");
947 brcmf_sdiod_regwb(bus->sdiodev,
948 SBSDIO_FUNC1_CHIPCLKCSR,
949 SBSDIO_ALP_AVAIL_REQ, &err);
950 }
951 err = brcmf_sdio_kso_control(bus, false);
952 } else {
953 err = brcmf_sdio_kso_control(bus, true);
954 }
955 if (err) {
956 brcmf_err("error while changing bus sleep state %d\n",
957 err);
958 goto done;
959 }
960 }
961
962 end:
963 /* control clocks */
964 if (sleep) {
965 if (!bus->sr_enabled)
966 brcmf_sdio_clkctl(bus, CLK_NONE, pendok);
967 } else {
968 brcmf_sdio_clkctl(bus, CLK_AVAIL, pendok);
969 brcmf_sdio_wd_timer(bus, true);
970 }
971 bus->sleeping = sleep;
972 brcmf_dbg(SDIO, "new state %s\n",
973 (sleep ? "SLEEP" : "WAKE"));
974 done:
975 brcmf_dbg(SDIO, "Exit: err=%d\n", err);
976 return err;
977
978 }
979
980 #ifdef DEBUG
981 static inline bool brcmf_sdio_valid_shared_address(u32 addr)
982 {
983 return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
984 }
985
986 static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
987 struct sdpcm_shared *sh)
988 {
989 u32 addr = 0;
990 int rv;
991 u32 shaddr = 0;
992 struct sdpcm_shared_le sh_le;
993 __le32 addr_le;
994
995 sdio_claim_host(bus->sdiodev->func[1]);
996 brcmf_sdio_bus_sleep(bus, false, false);
997
998 /*
999 * Read last word in socram to determine
1000 * address of sdpcm_shared structure
1001 */
1002 shaddr = bus->ci->rambase + bus->ci->ramsize - 4;
1003 if (!bus->ci->rambase && brcmf_chip_sr_capable(bus->ci))
1004 shaddr -= bus->ci->srsize;
1005 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, shaddr,
1006 (u8 *)&addr_le, 4);
1007 if (rv < 0)
1008 goto fail;
1009
1010 /*
1011 * Check if addr is valid.
1012 * NVRAM length at the end of memory should have been overwritten.
1013 */
1014 addr = le32_to_cpu(addr_le);
1015 if (!brcmf_sdio_valid_shared_address(addr)) {
1016 brcmf_err("invalid sdpcm_shared address 0x%08X\n", addr);
1017 rv = -EINVAL;
1018 goto fail;
1019 }
1020
1021 brcmf_dbg(INFO, "sdpcm_shared address 0x%08X\n", addr);
1022
1023 /* Read hndrte_shared structure */
1024 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&sh_le,
1025 sizeof(struct sdpcm_shared_le));
1026 if (rv < 0)
1027 goto fail;
1028
1029 sdio_release_host(bus->sdiodev->func[1]);
1030
1031 /* Endianness */
1032 sh->flags = le32_to_cpu(sh_le.flags);
1033 sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
1034 sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
1035 sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
1036 sh->assert_line = le32_to_cpu(sh_le.assert_line);
1037 sh->console_addr = le32_to_cpu(sh_le.console_addr);
1038 sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
1039
1040 if ((sh->flags & SDPCM_SHARED_VERSION_MASK) > SDPCM_SHARED_VERSION) {
1041 brcmf_err("sdpcm shared version unsupported: dhd %d dongle %d\n",
1042 SDPCM_SHARED_VERSION,
1043 sh->flags & SDPCM_SHARED_VERSION_MASK);
1044 return -EPROTO;
1045 }
1046 return 0;
1047
1048 fail:
1049 brcmf_err("unable to obtain sdpcm_shared info: rv=%d (addr=0x%x)\n",
1050 rv, addr);
1051 sdio_release_host(bus->sdiodev->func[1]);
1052 return rv;
1053 }
1054
1055 static void brcmf_sdio_get_console_addr(struct brcmf_sdio *bus)
1056 {
1057 struct sdpcm_shared sh;
1058
1059 if (brcmf_sdio_readshared(bus, &sh) == 0)
1060 bus->console_addr = sh.console_addr;
1061 }
1062 #else
1063 static void brcmf_sdio_get_console_addr(struct brcmf_sdio *bus)
1064 {
1065 }
1066 #endif /* DEBUG */
1067
1068 static u32 brcmf_sdio_hostmail(struct brcmf_sdio *bus)
1069 {
1070 u32 intstatus = 0;
1071 u32 hmb_data;
1072 u8 fcbits;
1073 int ret;
1074
1075 brcmf_dbg(SDIO, "Enter\n");
1076
1077 /* Read mailbox data and ack that we did so */
1078 ret = r_sdreg32(bus, &hmb_data,
1079 offsetof(struct sdpcmd_regs, tohostmailboxdata));
1080
1081 if (ret == 0)
1082 w_sdreg32(bus, SMB_INT_ACK,
1083 offsetof(struct sdpcmd_regs, tosbmailbox));
1084 bus->sdcnt.f1regdata += 2;
1085
1086 /* Dongle recomposed rx frames, accept them again */
1087 if (hmb_data & HMB_DATA_NAKHANDLED) {
1088 brcmf_dbg(SDIO, "Dongle reports NAK handled, expect rtx of %d\n",
1089 bus->rx_seq);
1090 if (!bus->rxskip)
1091 brcmf_err("unexpected NAKHANDLED!\n");
1092
1093 bus->rxskip = false;
1094 intstatus |= I_HMB_FRAME_IND;
1095 }
1096
1097 /*
1098 * DEVREADY does not occur with gSPI.
1099 */
1100 if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
1101 bus->sdpcm_ver =
1102 (hmb_data & HMB_DATA_VERSION_MASK) >>
1103 HMB_DATA_VERSION_SHIFT;
1104 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
1105 brcmf_err("Version mismatch, dongle reports %d, "
1106 "expecting %d\n",
1107 bus->sdpcm_ver, SDPCM_PROT_VERSION);
1108 else
1109 brcmf_dbg(SDIO, "Dongle ready, protocol version %d\n",
1110 bus->sdpcm_ver);
1111
1112 /*
1113 * Retrieve console state address now that firmware should have
1114 * updated it.
1115 */
1116 brcmf_sdio_get_console_addr(bus);
1117 }
1118
1119 /*
1120 * Flow Control has been moved into the RX headers and this out of band
1121 * method isn't used any more.
1122 * remaining backward compatible with older dongles.
1123 */
1124 if (hmb_data & HMB_DATA_FC) {
1125 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
1126 HMB_DATA_FCDATA_SHIFT;
1127
1128 if (fcbits & ~bus->flowcontrol)
1129 bus->sdcnt.fc_xoff++;
1130
1131 if (bus->flowcontrol & ~fcbits)
1132 bus->sdcnt.fc_xon++;
1133
1134 bus->sdcnt.fc_rcvd++;
1135 bus->flowcontrol = fcbits;
1136 }
1137
1138 /* Shouldn't be any others */
1139 if (hmb_data & ~(HMB_DATA_DEVREADY |
1140 HMB_DATA_NAKHANDLED |
1141 HMB_DATA_FC |
1142 HMB_DATA_FWREADY |
1143 HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
1144 brcmf_err("Unknown mailbox data content: 0x%02x\n",
1145 hmb_data);
1146
1147 return intstatus;
1148 }
1149
1150 static void brcmf_sdio_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
1151 {
1152 uint retries = 0;
1153 u16 lastrbc;
1154 u8 hi, lo;
1155 int err;
1156
1157 brcmf_err("%sterminate frame%s\n",
1158 abort ? "abort command, " : "",
1159 rtx ? ", send NAK" : "");
1160
1161 if (abort)
1162 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
1163
1164 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
1165 SFC_RF_TERM, &err);
1166 bus->sdcnt.f1regdata++;
1167
1168 /* Wait until the packet has been flushed (device/FIFO stable) */
1169 for (lastrbc = retries = 0xffff; retries > 0; retries--) {
1170 hi = brcmf_sdiod_regrb(bus->sdiodev,
1171 SBSDIO_FUNC1_RFRAMEBCHI, &err);
1172 lo = brcmf_sdiod_regrb(bus->sdiodev,
1173 SBSDIO_FUNC1_RFRAMEBCLO, &err);
1174 bus->sdcnt.f1regdata += 2;
1175
1176 if ((hi == 0) && (lo == 0))
1177 break;
1178
1179 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
1180 brcmf_err("count growing: last 0x%04x now 0x%04x\n",
1181 lastrbc, (hi << 8) + lo);
1182 }
1183 lastrbc = (hi << 8) + lo;
1184 }
1185
1186 if (!retries)
1187 brcmf_err("count never zeroed: last 0x%04x\n", lastrbc);
1188 else
1189 brcmf_dbg(SDIO, "flush took %d iterations\n", 0xffff - retries);
1190
1191 if (rtx) {
1192 bus->sdcnt.rxrtx++;
1193 err = w_sdreg32(bus, SMB_NAK,
1194 offsetof(struct sdpcmd_regs, tosbmailbox));
1195
1196 bus->sdcnt.f1regdata++;
1197 if (err == 0)
1198 bus->rxskip = true;
1199 }
1200
1201 /* Clear partial in any case */
1202 bus->cur_read.len = 0;
1203 }
1204
1205 static void brcmf_sdio_txfail(struct brcmf_sdio *bus)
1206 {
1207 struct brcmf_sdio_dev *sdiodev = bus->sdiodev;
1208 u8 i, hi, lo;
1209
1210 /* On failure, abort the command and terminate the frame */
1211 brcmf_err("sdio error, abort command and terminate frame\n");
1212 bus->sdcnt.tx_sderrs++;
1213
1214 brcmf_sdiod_abort(sdiodev, SDIO_FUNC_2);
1215 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_FRAMECTRL, SFC_WF_TERM, NULL);
1216 bus->sdcnt.f1regdata++;
1217
1218 for (i = 0; i < 3; i++) {
1219 hi = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_WFRAMEBCHI, NULL);
1220 lo = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_WFRAMEBCLO, NULL);
1221 bus->sdcnt.f1regdata += 2;
1222 if ((hi == 0) && (lo == 0))
1223 break;
1224 }
1225 }
1226
1227 /* return total length of buffer chain */
1228 static uint brcmf_sdio_glom_len(struct brcmf_sdio *bus)
1229 {
1230 struct sk_buff *p;
1231 uint total;
1232
1233 total = 0;
1234 skb_queue_walk(&bus->glom, p)
1235 total += p->len;
1236 return total;
1237 }
1238
1239 static void brcmf_sdio_free_glom(struct brcmf_sdio *bus)
1240 {
1241 struct sk_buff *cur, *next;
1242
1243 skb_queue_walk_safe(&bus->glom, cur, next) {
1244 skb_unlink(cur, &bus->glom);
1245 brcmu_pkt_buf_free_skb(cur);
1246 }
1247 }
1248
1249 /**
1250 * brcmfmac sdio bus specific header
1251 * This is the lowest layer header wrapped on the packets transmitted between
1252 * host and WiFi dongle which contains information needed for SDIO core and
1253 * firmware
1254 *
1255 * It consists of 3 parts: hardware header, hardware extension header and
1256 * software header
1257 * hardware header (frame tag) - 4 bytes
1258 * Byte 0~1: Frame length
1259 * Byte 2~3: Checksum, bit-wise inverse of frame length
1260 * hardware extension header - 8 bytes
1261 * Tx glom mode only, N/A for Rx or normal Tx
1262 * Byte 0~1: Packet length excluding hw frame tag
1263 * Byte 2: Reserved
1264 * Byte 3: Frame flags, bit 0: last frame indication
1265 * Byte 4~5: Reserved
1266 * Byte 6~7: Tail padding length
1267 * software header - 8 bytes
1268 * Byte 0: Rx/Tx sequence number
1269 * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
1270 * Byte 2: Length of next data frame, reserved for Tx
1271 * Byte 3: Data offset
1272 * Byte 4: Flow control bits, reserved for Tx
1273 * Byte 5: Maximum Sequence number allowed by firmware for Tx, N/A for Tx packet
1274 * Byte 6~7: Reserved
1275 */
1276 #define SDPCM_HWHDR_LEN 4
1277 #define SDPCM_HWEXT_LEN 8
1278 #define SDPCM_SWHDR_LEN 8
1279 #define SDPCM_HDRLEN (SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN)
1280 /* software header */
1281 #define SDPCM_SEQ_MASK 0x000000ff
1282 #define SDPCM_SEQ_WRAP 256
1283 #define SDPCM_CHANNEL_MASK 0x00000f00
1284 #define SDPCM_CHANNEL_SHIFT 8
1285 #define SDPCM_CONTROL_CHANNEL 0 /* Control */
1286 #define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication */
1287 #define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv */
1288 #define SDPCM_GLOM_CHANNEL 3 /* Coalesced packets */
1289 #define SDPCM_TEST_CHANNEL 15 /* Test/debug packets */
1290 #define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80)
1291 #define SDPCM_NEXTLEN_MASK 0x00ff0000
1292 #define SDPCM_NEXTLEN_SHIFT 16
1293 #define SDPCM_DOFFSET_MASK 0xff000000
1294 #define SDPCM_DOFFSET_SHIFT 24
1295 #define SDPCM_FCMASK_MASK 0x000000ff
1296 #define SDPCM_WINDOW_MASK 0x0000ff00
1297 #define SDPCM_WINDOW_SHIFT 8
1298
1299 static inline u8 brcmf_sdio_getdatoffset(u8 *swheader)
1300 {
1301 u32 hdrvalue;
1302 hdrvalue = *(u32 *)swheader;
1303 return (u8)((hdrvalue & SDPCM_DOFFSET_MASK) >> SDPCM_DOFFSET_SHIFT);
1304 }
1305
1306 static inline bool brcmf_sdio_fromevntchan(u8 *swheader)
1307 {
1308 u32 hdrvalue;
1309 u8 ret;
1310
1311 hdrvalue = *(u32 *)swheader;
1312 ret = (u8)((hdrvalue & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT);
1313
1314 return (ret == SDPCM_EVENT_CHANNEL);
1315 }
1316
1317 static int brcmf_sdio_hdparse(struct brcmf_sdio *bus, u8 *header,
1318 struct brcmf_sdio_hdrinfo *rd,
1319 enum brcmf_sdio_frmtype type)
1320 {
1321 u16 len, checksum;
1322 u8 rx_seq, fc, tx_seq_max;
1323 u32 swheader;
1324
1325 trace_brcmf_sdpcm_hdr(SDPCM_RX, header);
1326
1327 /* hw header */
1328 len = get_unaligned_le16(header);
1329 checksum = get_unaligned_le16(header + sizeof(u16));
1330 /* All zero means no more to read */
1331 if (!(len | checksum)) {
1332 bus->rxpending = false;
1333 return -ENODATA;
1334 }
1335 if ((u16)(~(len ^ checksum))) {
1336 brcmf_err("HW header checksum error\n");
1337 bus->sdcnt.rx_badhdr++;
1338 brcmf_sdio_rxfail(bus, false, false);
1339 return -EIO;
1340 }
1341 if (len < SDPCM_HDRLEN) {
1342 brcmf_err("HW header length error\n");
1343 return -EPROTO;
1344 }
1345 if (type == BRCMF_SDIO_FT_SUPER &&
1346 (roundup(len, bus->blocksize) != rd->len)) {
1347 brcmf_err("HW superframe header length error\n");
1348 return -EPROTO;
1349 }
1350 if (type == BRCMF_SDIO_FT_SUB && len > rd->len) {
1351 brcmf_err("HW subframe header length error\n");
1352 return -EPROTO;
1353 }
1354 rd->len = len;
1355
1356 /* software header */
1357 header += SDPCM_HWHDR_LEN;
1358 swheader = le32_to_cpu(*(__le32 *)header);
1359 if (type == BRCMF_SDIO_FT_SUPER && SDPCM_GLOMDESC(header)) {
1360 brcmf_err("Glom descriptor found in superframe head\n");
1361 rd->len = 0;
1362 return -EINVAL;
1363 }
1364 rx_seq = (u8)(swheader & SDPCM_SEQ_MASK);
1365 rd->channel = (swheader & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT;
1366 if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
1367 type != BRCMF_SDIO_FT_SUPER) {
1368 brcmf_err("HW header length too long\n");
1369 bus->sdcnt.rx_toolong++;
1370 brcmf_sdio_rxfail(bus, false, false);
1371 rd->len = 0;
1372 return -EPROTO;
1373 }
1374 if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) {
1375 brcmf_err("Wrong channel for superframe\n");
1376 rd->len = 0;
1377 return -EINVAL;
1378 }
1379 if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL &&
1380 rd->channel != SDPCM_EVENT_CHANNEL) {
1381 brcmf_err("Wrong channel for subframe\n");
1382 rd->len = 0;
1383 return -EINVAL;
1384 }
1385 rd->dat_offset = brcmf_sdio_getdatoffset(header);
1386 if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
1387 brcmf_err("seq %d: bad data offset\n", rx_seq);
1388 bus->sdcnt.rx_badhdr++;
1389 brcmf_sdio_rxfail(bus, false, false);
1390 rd->len = 0;
1391 return -ENXIO;
1392 }
1393 if (rd->seq_num != rx_seq) {
1394 brcmf_dbg(SDIO, "seq %d, expected %d\n", rx_seq, rd->seq_num);
1395 bus->sdcnt.rx_badseq++;
1396 rd->seq_num = rx_seq;
1397 }
1398 /* no need to check the reset for subframe */
1399 if (type == BRCMF_SDIO_FT_SUB)
1400 return 0;
1401 rd->len_nxtfrm = (swheader & SDPCM_NEXTLEN_MASK) >> SDPCM_NEXTLEN_SHIFT;
1402 if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
1403 /* only warm for NON glom packet */
1404 if (rd->channel != SDPCM_GLOM_CHANNEL)
1405 brcmf_err("seq %d: next length error\n", rx_seq);
1406 rd->len_nxtfrm = 0;
1407 }
1408 swheader = le32_to_cpu(*(__le32 *)(header + 4));
1409 fc = swheader & SDPCM_FCMASK_MASK;
1410 if (bus->flowcontrol != fc) {
1411 if (~bus->flowcontrol & fc)
1412 bus->sdcnt.fc_xoff++;
1413 if (bus->flowcontrol & ~fc)
1414 bus->sdcnt.fc_xon++;
1415 bus->sdcnt.fc_rcvd++;
1416 bus->flowcontrol = fc;
1417 }
1418 tx_seq_max = (swheader & SDPCM_WINDOW_MASK) >> SDPCM_WINDOW_SHIFT;
1419 if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
1420 brcmf_err("seq %d: max tx seq number error\n", rx_seq);
1421 tx_seq_max = bus->tx_seq + 2;
1422 }
1423 bus->tx_max = tx_seq_max;
1424
1425 return 0;
1426 }
1427
1428 static inline void brcmf_sdio_update_hwhdr(u8 *header, u16 frm_length)
1429 {
1430 *(__le16 *)header = cpu_to_le16(frm_length);
1431 *(((__le16 *)header) + 1) = cpu_to_le16(~frm_length);
1432 }
1433
1434 static void brcmf_sdio_hdpack(struct brcmf_sdio *bus, u8 *header,
1435 struct brcmf_sdio_hdrinfo *hd_info)
1436 {
1437 u32 hdrval;
1438 u8 hdr_offset;
1439
1440 brcmf_sdio_update_hwhdr(header, hd_info->len);
1441 hdr_offset = SDPCM_HWHDR_LEN;
1442
1443 if (bus->txglom) {
1444 hdrval = (hd_info->len - hdr_offset) | (hd_info->lastfrm << 24);
1445 *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval);
1446 hdrval = (u16)hd_info->tail_pad << 16;
1447 *(((__le32 *)(header + hdr_offset)) + 1) = cpu_to_le32(hdrval);
1448 hdr_offset += SDPCM_HWEXT_LEN;
1449 }
1450
1451 hdrval = hd_info->seq_num;
1452 hdrval |= (hd_info->channel << SDPCM_CHANNEL_SHIFT) &
1453 SDPCM_CHANNEL_MASK;
1454 hdrval |= (hd_info->dat_offset << SDPCM_DOFFSET_SHIFT) &
1455 SDPCM_DOFFSET_MASK;
1456 *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval);
1457 *(((__le32 *)(header + hdr_offset)) + 1) = 0;
1458 trace_brcmf_sdpcm_hdr(SDPCM_TX + !!(bus->txglom), header);
1459 }
1460
1461 static u8 brcmf_sdio_rxglom(struct brcmf_sdio *bus, u8 rxseq)
1462 {
1463 u16 dlen, totlen;
1464 u8 *dptr, num = 0;
1465 u16 sublen;
1466 struct sk_buff *pfirst, *pnext;
1467
1468 int errcode;
1469 u8 doff, sfdoff;
1470
1471 struct brcmf_sdio_hdrinfo rd_new;
1472
1473 /* If packets, issue read(s) and send up packet chain */
1474 /* Return sequence numbers consumed? */
1475
1476 brcmf_dbg(SDIO, "start: glomd %p glom %p\n",
1477 bus->glomd, skb_peek(&bus->glom));
1478
1479 /* If there's a descriptor, generate the packet chain */
1480 if (bus->glomd) {
1481 pfirst = pnext = NULL;
1482 dlen = (u16) (bus->glomd->len);
1483 dptr = bus->glomd->data;
1484 if (!dlen || (dlen & 1)) {
1485 brcmf_err("bad glomd len(%d), ignore descriptor\n",
1486 dlen);
1487 dlen = 0;
1488 }
1489
1490 for (totlen = num = 0; dlen; num++) {
1491 /* Get (and move past) next length */
1492 sublen = get_unaligned_le16(dptr);
1493 dlen -= sizeof(u16);
1494 dptr += sizeof(u16);
1495 if ((sublen < SDPCM_HDRLEN) ||
1496 ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1497 brcmf_err("descriptor len %d bad: %d\n",
1498 num, sublen);
1499 pnext = NULL;
1500 break;
1501 }
1502 if (sublen % bus->sgentry_align) {
1503 brcmf_err("sublen %d not multiple of %d\n",
1504 sublen, bus->sgentry_align);
1505 }
1506 totlen += sublen;
1507
1508 /* For last frame, adjust read len so total
1509 is a block multiple */
1510 if (!dlen) {
1511 sublen +=
1512 (roundup(totlen, bus->blocksize) - totlen);
1513 totlen = roundup(totlen, bus->blocksize);
1514 }
1515
1516 /* Allocate/chain packet for next subframe */
1517 pnext = brcmu_pkt_buf_get_skb(sublen + bus->sgentry_align);
1518 if (pnext == NULL) {
1519 brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
1520 num, sublen);
1521 break;
1522 }
1523 skb_queue_tail(&bus->glom, pnext);
1524
1525 /* Adhere to start alignment requirements */
1526 pkt_align(pnext, sublen, bus->sgentry_align);
1527 }
1528
1529 /* If all allocations succeeded, save packet chain
1530 in bus structure */
1531 if (pnext) {
1532 brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1533 totlen, num);
1534 if (BRCMF_GLOM_ON() && bus->cur_read.len &&
1535 totlen != bus->cur_read.len) {
1536 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1537 bus->cur_read.len, totlen, rxseq);
1538 }
1539 pfirst = pnext = NULL;
1540 } else {
1541 brcmf_sdio_free_glom(bus);
1542 num = 0;
1543 }
1544
1545 /* Done with descriptor packet */
1546 brcmu_pkt_buf_free_skb(bus->glomd);
1547 bus->glomd = NULL;
1548 bus->cur_read.len = 0;
1549 }
1550
1551 /* Ok -- either we just generated a packet chain,
1552 or had one from before */
1553 if (!skb_queue_empty(&bus->glom)) {
1554 if (BRCMF_GLOM_ON()) {
1555 brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
1556 skb_queue_walk(&bus->glom, pnext) {
1557 brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n",
1558 pnext, (u8 *) (pnext->data),
1559 pnext->len, pnext->len);
1560 }
1561 }
1562
1563 pfirst = skb_peek(&bus->glom);
1564 dlen = (u16) brcmf_sdio_glom_len(bus);
1565
1566 /* Do an SDIO read for the superframe. Configurable iovar to
1567 * read directly into the chained packet, or allocate a large
1568 * packet and and copy into the chain.
1569 */
1570 sdio_claim_host(bus->sdiodev->func[1]);
1571 errcode = brcmf_sdiod_recv_chain(bus->sdiodev,
1572 &bus->glom, dlen);
1573 sdio_release_host(bus->sdiodev->func[1]);
1574 bus->sdcnt.f2rxdata++;
1575
1576 /* On failure, kill the superframe */
1577 if (errcode < 0) {
1578 brcmf_err("glom read of %d bytes failed: %d\n",
1579 dlen, errcode);
1580
1581 sdio_claim_host(bus->sdiodev->func[1]);
1582 brcmf_sdio_rxfail(bus, true, false);
1583 bus->sdcnt.rxglomfail++;
1584 brcmf_sdio_free_glom(bus);
1585 sdio_release_host(bus->sdiodev->func[1]);
1586 return 0;
1587 }
1588
1589 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1590 pfirst->data, min_t(int, pfirst->len, 48),
1591 "SUPERFRAME:\n");
1592
1593 rd_new.seq_num = rxseq;
1594 rd_new.len = dlen;
1595 sdio_claim_host(bus->sdiodev->func[1]);
1596 errcode = brcmf_sdio_hdparse(bus, pfirst->data, &rd_new,
1597 BRCMF_SDIO_FT_SUPER);
1598 sdio_release_host(bus->sdiodev->func[1]);
1599 bus->cur_read.len = rd_new.len_nxtfrm << 4;
1600
1601 /* Remove superframe header, remember offset */
1602 skb_pull(pfirst, rd_new.dat_offset);
1603 sfdoff = rd_new.dat_offset;
1604 num = 0;
1605
1606 /* Validate all the subframe headers */
1607 skb_queue_walk(&bus->glom, pnext) {
1608 /* leave when invalid subframe is found */
1609 if (errcode)
1610 break;
1611
1612 rd_new.len = pnext->len;
1613 rd_new.seq_num = rxseq++;
1614 sdio_claim_host(bus->sdiodev->func[1]);
1615 errcode = brcmf_sdio_hdparse(bus, pnext->data, &rd_new,
1616 BRCMF_SDIO_FT_SUB);
1617 sdio_release_host(bus->sdiodev->func[1]);
1618 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1619 pnext->data, 32, "subframe:\n");
1620
1621 num++;
1622 }
1623
1624 if (errcode) {
1625 /* Terminate frame on error */
1626 sdio_claim_host(bus->sdiodev->func[1]);
1627 brcmf_sdio_rxfail(bus, true, false);
1628 bus->sdcnt.rxglomfail++;
1629 brcmf_sdio_free_glom(bus);
1630 sdio_release_host(bus->sdiodev->func[1]);
1631 bus->cur_read.len = 0;
1632 return 0;
1633 }
1634
1635 /* Basic SD framing looks ok - process each packet (header) */
1636
1637 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
1638 dptr = (u8 *) (pfirst->data);
1639 sublen = get_unaligned_le16(dptr);
1640 doff = brcmf_sdio_getdatoffset(&dptr[SDPCM_HWHDR_LEN]);
1641
1642 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1643 dptr, pfirst->len,
1644 "Rx Subframe Data:\n");
1645
1646 __skb_trim(pfirst, sublen);
1647 skb_pull(pfirst, doff);
1648
1649 if (pfirst->len == 0) {
1650 skb_unlink(pfirst, &bus->glom);
1651 brcmu_pkt_buf_free_skb(pfirst);
1652 continue;
1653 }
1654
1655 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1656 pfirst->data,
1657 min_t(int, pfirst->len, 32),
1658 "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1659 bus->glom.qlen, pfirst, pfirst->data,
1660 pfirst->len, pfirst->next,
1661 pfirst->prev);
1662 skb_unlink(pfirst, &bus->glom);
1663 if (brcmf_sdio_fromevntchan(pfirst->data))
1664 brcmf_rx_event(bus->sdiodev->dev, pfirst);
1665 else
1666 brcmf_rx_frame(bus->sdiodev->dev, pfirst,
1667 false);
1668 bus->sdcnt.rxglompkts++;
1669 }
1670
1671 bus->sdcnt.rxglomframes++;
1672 }
1673 return num;
1674 }
1675
1676 static int brcmf_sdio_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
1677 bool *pending)
1678 {
1679 DECLARE_WAITQUEUE(wait, current);
1680 int timeout = DCMD_RESP_TIMEOUT;
1681
1682 /* Wait until control frame is available */
1683 add_wait_queue(&bus->dcmd_resp_wait, &wait);
1684 set_current_state(TASK_INTERRUPTIBLE);
1685
1686 while (!(*condition) && (!signal_pending(current) && timeout))
1687 timeout = schedule_timeout(timeout);
1688
1689 if (signal_pending(current))
1690 *pending = true;
1691
1692 set_current_state(TASK_RUNNING);
1693 remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1694
1695 return timeout;
1696 }
1697
1698 static int brcmf_sdio_dcmd_resp_wake(struct brcmf_sdio *bus)
1699 {
1700 wake_up_interruptible(&bus->dcmd_resp_wait);
1701
1702 return 0;
1703 }
1704 static void
1705 brcmf_sdio_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
1706 {
1707 uint rdlen, pad;
1708 u8 *buf = NULL, *rbuf;
1709 int sdret;
1710
1711 brcmf_dbg(TRACE, "Enter\n");
1712
1713 if (bus->rxblen)
1714 buf = vzalloc(bus->rxblen);
1715 if (!buf)
1716 goto done;
1717
1718 rbuf = bus->rxbuf;
1719 pad = ((unsigned long)rbuf % bus->head_align);
1720 if (pad)
1721 rbuf += (bus->head_align - pad);
1722
1723 /* Copy the already-read portion over */
1724 memcpy(buf, hdr, BRCMF_FIRSTREAD);
1725 if (len <= BRCMF_FIRSTREAD)
1726 goto gotpkt;
1727
1728 /* Raise rdlen to next SDIO block to avoid tail command */
1729 rdlen = len - BRCMF_FIRSTREAD;
1730 if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1731 pad = bus->blocksize - (rdlen % bus->blocksize);
1732 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1733 ((len + pad) < bus->sdiodev->bus_if->maxctl))
1734 rdlen += pad;
1735 } else if (rdlen % bus->head_align) {
1736 rdlen += bus->head_align - (rdlen % bus->head_align);
1737 }
1738
1739 /* Drop if the read is too big or it exceeds our maximum */
1740 if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
1741 brcmf_err("%d-byte control read exceeds %d-byte buffer\n",
1742 rdlen, bus->sdiodev->bus_if->maxctl);
1743 brcmf_sdio_rxfail(bus, false, false);
1744 goto done;
1745 }
1746
1747 if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
1748 brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
1749 len, len - doff, bus->sdiodev->bus_if->maxctl);
1750 bus->sdcnt.rx_toolong++;
1751 brcmf_sdio_rxfail(bus, false, false);
1752 goto done;
1753 }
1754
1755 /* Read remain of frame body */
1756 sdret = brcmf_sdiod_recv_buf(bus->sdiodev, rbuf, rdlen);
1757 bus->sdcnt.f2rxdata++;
1758
1759 /* Control frame failures need retransmission */
1760 if (sdret < 0) {
1761 brcmf_err("read %d control bytes failed: %d\n",
1762 rdlen, sdret);
1763 bus->sdcnt.rxc_errors++;
1764 brcmf_sdio_rxfail(bus, true, true);
1765 goto done;
1766 } else
1767 memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen);
1768
1769 gotpkt:
1770
1771 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
1772 buf, len, "RxCtrl:\n");
1773
1774 /* Point to valid data and indicate its length */
1775 spin_lock_bh(&bus->rxctl_lock);
1776 if (bus->rxctl) {
1777 brcmf_err("last control frame is being processed.\n");
1778 spin_unlock_bh(&bus->rxctl_lock);
1779 vfree(buf);
1780 goto done;
1781 }
1782 bus->rxctl = buf + doff;
1783 bus->rxctl_orig = buf;
1784 bus->rxlen = len - doff;
1785 spin_unlock_bh(&bus->rxctl_lock);
1786
1787 done:
1788 /* Awake any waiters */
1789 brcmf_sdio_dcmd_resp_wake(bus);
1790 }
1791
1792 /* Pad read to blocksize for efficiency */
1793 static void brcmf_sdio_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
1794 {
1795 if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1796 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1797 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1798 *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1799 *rdlen += *pad;
1800 } else if (*rdlen % bus->head_align) {
1801 *rdlen += bus->head_align - (*rdlen % bus->head_align);
1802 }
1803 }
1804
1805 static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
1806 {
1807 struct sk_buff *pkt; /* Packet for event or data frames */
1808 u16 pad; /* Number of pad bytes to read */
1809 uint rxleft = 0; /* Remaining number of frames allowed */
1810 int ret; /* Return code from calls */
1811 uint rxcount = 0; /* Total frames read */
1812 struct brcmf_sdio_hdrinfo *rd = &bus->cur_read, rd_new;
1813 u8 head_read = 0;
1814
1815 brcmf_dbg(TRACE, "Enter\n");
1816
1817 /* Not finished unless we encounter no more frames indication */
1818 bus->rxpending = true;
1819
1820 for (rd->seq_num = bus->rx_seq, rxleft = maxframes;
1821 !bus->rxskip && rxleft && bus->sdiodev->state == BRCMF_SDIOD_DATA;
1822 rd->seq_num++, rxleft--) {
1823
1824 /* Handle glomming separately */
1825 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
1826 u8 cnt;
1827 brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
1828 bus->glomd, skb_peek(&bus->glom));
1829 cnt = brcmf_sdio_rxglom(bus, rd->seq_num);
1830 brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1831 rd->seq_num += cnt - 1;
1832 rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1833 continue;
1834 }
1835
1836 rd->len_left = rd->len;
1837 /* read header first for unknow frame length */
1838 sdio_claim_host(bus->sdiodev->func[1]);
1839 if (!rd->len) {
1840 ret = brcmf_sdiod_recv_buf(bus->sdiodev,
1841 bus->rxhdr, BRCMF_FIRSTREAD);
1842 bus->sdcnt.f2rxhdrs++;
1843 if (ret < 0) {
1844 brcmf_err("RXHEADER FAILED: %d\n",
1845 ret);
1846 bus->sdcnt.rx_hdrfail++;
1847 brcmf_sdio_rxfail(bus, true, true);
1848 sdio_release_host(bus->sdiodev->func[1]);
1849 continue;
1850 }
1851
1852 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
1853 bus->rxhdr, SDPCM_HDRLEN,
1854 "RxHdr:\n");
1855
1856 if (brcmf_sdio_hdparse(bus, bus->rxhdr, rd,
1857 BRCMF_SDIO_FT_NORMAL)) {
1858 sdio_release_host(bus->sdiodev->func[1]);
1859 if (!bus->rxpending)
1860 break;
1861 else
1862 continue;
1863 }
1864
1865 if (rd->channel == SDPCM_CONTROL_CHANNEL) {
1866 brcmf_sdio_read_control(bus, bus->rxhdr,
1867 rd->len,
1868 rd->dat_offset);
1869 /* prepare the descriptor for the next read */
1870 rd->len = rd->len_nxtfrm << 4;
1871 rd->len_nxtfrm = 0;
1872 /* treat all packet as event if we don't know */
1873 rd->channel = SDPCM_EVENT_CHANNEL;
1874 sdio_release_host(bus->sdiodev->func[1]);
1875 continue;
1876 }
1877 rd->len_left = rd->len > BRCMF_FIRSTREAD ?
1878 rd->len - BRCMF_FIRSTREAD : 0;
1879 head_read = BRCMF_FIRSTREAD;
1880 }
1881
1882 brcmf_sdio_pad(bus, &pad, &rd->len_left);
1883
1884 pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read +
1885 bus->head_align);
1886 if (!pkt) {
1887 /* Give up on data, request rtx of events */
1888 brcmf_err("brcmu_pkt_buf_get_skb failed\n");
1889 brcmf_sdio_rxfail(bus, false,
1890 RETRYCHAN(rd->channel));
1891 sdio_release_host(bus->sdiodev->func[1]);
1892 continue;
1893 }
1894 skb_pull(pkt, head_read);
1895 pkt_align(pkt, rd->len_left, bus->head_align);
1896
1897 ret = brcmf_sdiod_recv_pkt(bus->sdiodev, pkt);
1898 bus->sdcnt.f2rxdata++;
1899 sdio_release_host(bus->sdiodev->func[1]);
1900
1901 if (ret < 0) {
1902 brcmf_err("read %d bytes from channel %d failed: %d\n",
1903 rd->len, rd->channel, ret);
1904 brcmu_pkt_buf_free_skb(pkt);
1905 sdio_claim_host(bus->sdiodev->func[1]);
1906 brcmf_sdio_rxfail(bus, true,
1907 RETRYCHAN(rd->channel));
1908 sdio_release_host(bus->sdiodev->func[1]);
1909 continue;
1910 }
1911
1912 if (head_read) {
1913 skb_push(pkt, head_read);
1914 memcpy(pkt->data, bus->rxhdr, head_read);
1915 head_read = 0;
1916 } else {
1917 memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
1918 rd_new.seq_num = rd->seq_num;
1919 sdio_claim_host(bus->sdiodev->func[1]);
1920 if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new,
1921 BRCMF_SDIO_FT_NORMAL)) {
1922 rd->len = 0;
1923 brcmu_pkt_buf_free_skb(pkt);
1924 }
1925 bus->sdcnt.rx_readahead_cnt++;
1926 if (rd->len != roundup(rd_new.len, 16)) {
1927 brcmf_err("frame length mismatch:read %d, should be %d\n",
1928 rd->len,
1929 roundup(rd_new.len, 16) >> 4);
1930 rd->len = 0;
1931 brcmf_sdio_rxfail(bus, true, true);
1932 sdio_release_host(bus->sdiodev->func[1]);
1933 brcmu_pkt_buf_free_skb(pkt);
1934 continue;
1935 }
1936 sdio_release_host(bus->sdiodev->func[1]);
1937 rd->len_nxtfrm = rd_new.len_nxtfrm;
1938 rd->channel = rd_new.channel;
1939 rd->dat_offset = rd_new.dat_offset;
1940
1941 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1942 BRCMF_DATA_ON()) &&
1943 BRCMF_HDRS_ON(),
1944 bus->rxhdr, SDPCM_HDRLEN,
1945 "RxHdr:\n");
1946
1947 if (rd_new.channel == SDPCM_CONTROL_CHANNEL) {
1948 brcmf_err("readahead on control packet %d?\n",
1949 rd_new.seq_num);
1950 /* Force retry w/normal header read */
1951 rd->len = 0;
1952 sdio_claim_host(bus->sdiodev->func[1]);
1953 brcmf_sdio_rxfail(bus, false, true);
1954 sdio_release_host(bus->sdiodev->func[1]);
1955 brcmu_pkt_buf_free_skb(pkt);
1956 continue;
1957 }
1958 }
1959
1960 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1961 pkt->data, rd->len, "Rx Data:\n");
1962
1963 /* Save superframe descriptor and allocate packet frame */
1964 if (rd->channel == SDPCM_GLOM_CHANNEL) {
1965 if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_HWHDR_LEN])) {
1966 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
1967 rd->len);
1968 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1969 pkt->data, rd->len,
1970 "Glom Data:\n");
1971 __skb_trim(pkt, rd->len);
1972 skb_pull(pkt, SDPCM_HDRLEN);
1973 bus->glomd = pkt;
1974 } else {
1975 brcmf_err("%s: glom superframe w/o "
1976 "descriptor!\n", __func__);
1977 sdio_claim_host(bus->sdiodev->func[1]);
1978 brcmf_sdio_rxfail(bus, false, false);
1979 sdio_release_host(bus->sdiodev->func[1]);
1980 }
1981 /* prepare the descriptor for the next read */
1982 rd->len = rd->len_nxtfrm << 4;
1983 rd->len_nxtfrm = 0;
1984 /* treat all packet as event if we don't know */
1985 rd->channel = SDPCM_EVENT_CHANNEL;
1986 continue;
1987 }
1988
1989 /* Fill in packet len and prio, deliver upward */
1990 __skb_trim(pkt, rd->len);
1991 skb_pull(pkt, rd->dat_offset);
1992
1993 if (pkt->len == 0)
1994 brcmu_pkt_buf_free_skb(pkt);
1995 else if (rd->channel == SDPCM_EVENT_CHANNEL)
1996 brcmf_rx_event(bus->sdiodev->dev, pkt);
1997 else
1998 brcmf_rx_frame(bus->sdiodev->dev, pkt,
1999 false);
2000
2001 /* prepare the descriptor for the next read */
2002 rd->len = rd->len_nxtfrm << 4;
2003 rd->len_nxtfrm = 0;
2004 /* treat all packet as event if we don't know */
2005 rd->channel = SDPCM_EVENT_CHANNEL;
2006 }
2007
2008 rxcount = maxframes - rxleft;
2009 /* Message if we hit the limit */
2010 if (!rxleft)
2011 brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes);
2012 else
2013 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
2014 /* Back off rxseq if awaiting rtx, update rx_seq */
2015 if (bus->rxskip)
2016 rd->seq_num--;
2017 bus->rx_seq = rd->seq_num;
2018
2019 return rxcount;
2020 }
2021
2022 static void
2023 brcmf_sdio_wait_event_wakeup(struct brcmf_sdio *bus)
2024 {
2025 wake_up_interruptible(&bus->ctrl_wait);
2026 return;
2027 }
2028
2029 static int brcmf_sdio_txpkt_hdalign(struct brcmf_sdio *bus, struct sk_buff *pkt)
2030 {
2031 u16 head_pad;
2032 u8 *dat_buf;
2033
2034 dat_buf = (u8 *)(pkt->data);
2035
2036 /* Check head padding */
2037 head_pad = ((unsigned long)dat_buf % bus->head_align);
2038 if (head_pad) {
2039 if (skb_headroom(pkt) < head_pad) {
2040 bus->sdiodev->bus_if->tx_realloc++;
2041 head_pad = 0;
2042 if (skb_cow(pkt, head_pad))
2043 return -ENOMEM;
2044 }
2045 skb_push(pkt, head_pad);
2046 dat_buf = (u8 *)(pkt->data);
2047 memset(dat_buf, 0, head_pad + bus->tx_hdrlen);
2048 }
2049 return head_pad;
2050 }
2051
2052 /**
2053 * struct brcmf_skbuff_cb reserves first two bytes in sk_buff::cb for
2054 * bus layer usage.
2055 */
2056 /* flag marking a dummy skb added for DMA alignment requirement */
2057 #define ALIGN_SKB_FLAG 0x8000
2058 /* bit mask of data length chopped from the previous packet */
2059 #define ALIGN_SKB_CHOP_LEN_MASK 0x7fff
2060
2061 static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus,
2062 struct sk_buff_head *pktq,
2063 struct sk_buff *pkt, u16 total_len)
2064 {
2065 struct brcmf_sdio_dev *sdiodev;
2066 struct sk_buff *pkt_pad;
2067 u16 tail_pad, tail_chop, chain_pad;
2068 unsigned int blksize;
2069 bool lastfrm;
2070 int ntail, ret;
2071
2072 sdiodev = bus->sdiodev;
2073 blksize = sdiodev->func[SDIO_FUNC_2]->cur_blksize;
2074 /* sg entry alignment should be a divisor of block size */
2075 WARN_ON(blksize % bus->sgentry_align);
2076
2077 /* Check tail padding */
2078 lastfrm = skb_queue_is_last(pktq, pkt);
2079 tail_pad = 0;
2080 tail_chop = pkt->len % bus->sgentry_align;
2081 if (tail_chop)
2082 tail_pad = bus->sgentry_align - tail_chop;
2083 chain_pad = (total_len + tail_pad) % blksize;
2084 if (lastfrm && chain_pad)
2085 tail_pad += blksize - chain_pad;
2086 if (skb_tailroom(pkt) < tail_pad && pkt->len > blksize) {
2087 pkt_pad = brcmu_pkt_buf_get_skb(tail_pad + tail_chop +
2088 bus->head_align);
2089 if (pkt_pad == NULL)
2090 return -ENOMEM;
2091 ret = brcmf_sdio_txpkt_hdalign(bus, pkt_pad);
2092 if (unlikely(ret < 0)) {
2093 kfree_skb(pkt_pad);
2094 return ret;
2095 }
2096 memcpy(pkt_pad->data,
2097 pkt->data + pkt->len - tail_chop,
2098 tail_chop);
2099 *(u16 *)(pkt_pad->cb) = ALIGN_SKB_FLAG + tail_chop;
2100 skb_trim(pkt, pkt->len - tail_chop);
2101 skb_trim(pkt_pad, tail_pad + tail_chop);
2102 __skb_queue_after(pktq, pkt, pkt_pad);
2103 } else {
2104 ntail = pkt->data_len + tail_pad -
2105 (pkt->end - pkt->tail);
2106 if (skb_cloned(pkt) || ntail > 0)
2107 if (pskb_expand_head(pkt, 0, ntail, GFP_ATOMIC))
2108 return -ENOMEM;
2109 if (skb_linearize(pkt))
2110 return -ENOMEM;
2111 __skb_put(pkt, tail_pad);
2112 }
2113
2114 return tail_pad;
2115 }
2116
2117 /**
2118 * brcmf_sdio_txpkt_prep - packet preparation for transmit
2119 * @bus: brcmf_sdio structure pointer
2120 * @pktq: packet list pointer
2121 * @chan: virtual channel to transmit the packet
2122 *
2123 * Processes to be applied to the packet
2124 * - Align data buffer pointer
2125 * - Align data buffer length
2126 * - Prepare header
2127 * Return: negative value if there is error
2128 */
2129 static int
2130 brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
2131 uint chan)
2132 {
2133 u16 head_pad, total_len;
2134 struct sk_buff *pkt_next;
2135 u8 txseq;
2136 int ret;
2137 struct brcmf_sdio_hdrinfo hd_info = {0};
2138
2139 txseq = bus->tx_seq;
2140 total_len = 0;
2141 skb_queue_walk(pktq, pkt_next) {
2142 /* alignment packet inserted in previous
2143 * loop cycle can be skipped as it is
2144 * already properly aligned and does not
2145 * need an sdpcm header.
2146 */
2147 if (*(u16 *)(pkt_next->cb) & ALIGN_SKB_FLAG)
2148 continue;
2149
2150 /* align packet data pointer */
2151 ret = brcmf_sdio_txpkt_hdalign(bus, pkt_next);
2152 if (ret < 0)
2153 return ret;
2154 head_pad = (u16)ret;
2155 if (head_pad)
2156 memset(pkt_next->data + bus->tx_hdrlen, 0, head_pad);
2157
2158 total_len += pkt_next->len;
2159
2160 hd_info.len = pkt_next->len;
2161 hd_info.lastfrm = skb_queue_is_last(pktq, pkt_next);
2162 if (bus->txglom && pktq->qlen > 1) {
2163 ret = brcmf_sdio_txpkt_prep_sg(bus, pktq,
2164 pkt_next, total_len);
2165 if (ret < 0)
2166 return ret;
2167 hd_info.tail_pad = (u16)ret;
2168 total_len += (u16)ret;
2169 }
2170
2171 hd_info.channel = chan;
2172 hd_info.dat_offset = head_pad + bus->tx_hdrlen;
2173 hd_info.seq_num = txseq++;
2174
2175 /* Now fill the header */
2176 brcmf_sdio_hdpack(bus, pkt_next->data, &hd_info);
2177
2178 if (BRCMF_BYTES_ON() &&
2179 ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
2180 (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)))
2181 brcmf_dbg_hex_dump(true, pkt_next->data, hd_info.len,
2182 "Tx Frame:\n");
2183 else if (BRCMF_HDRS_ON())
2184 brcmf_dbg_hex_dump(true, pkt_next->data,
2185 head_pad + bus->tx_hdrlen,
2186 "Tx Header:\n");
2187 }
2188 /* Hardware length tag of the first packet should be total
2189 * length of the chain (including padding)
2190 */
2191 if (bus->txglom)
2192 brcmf_sdio_update_hwhdr(pktq->next->data, total_len);
2193 return 0;
2194 }
2195
2196 /**
2197 * brcmf_sdio_txpkt_postp - packet post processing for transmit
2198 * @bus: brcmf_sdio structure pointer
2199 * @pktq: packet list pointer
2200 *
2201 * Processes to be applied to the packet
2202 * - Remove head padding
2203 * - Remove tail padding
2204 */
2205 static void
2206 brcmf_sdio_txpkt_postp(struct brcmf_sdio *bus, struct sk_buff_head *pktq)
2207 {
2208 u8 *hdr;
2209 u32 dat_offset;
2210 u16 tail_pad;
2211 u16 dummy_flags, chop_len;
2212 struct sk_buff *pkt_next, *tmp, *pkt_prev;
2213
2214 skb_queue_walk_safe(pktq, pkt_next, tmp) {
2215 dummy_flags = *(u16 *)(pkt_next->cb);
2216 if (dummy_flags & ALIGN_SKB_FLAG) {
2217 chop_len = dummy_flags & ALIGN_SKB_CHOP_LEN_MASK;
2218 if (chop_len) {
2219 pkt_prev = pkt_next->prev;
2220 skb_put(pkt_prev, chop_len);
2221 }
2222 __skb_unlink(pkt_next, pktq);
2223 brcmu_pkt_buf_free_skb(pkt_next);
2224 } else {
2225 hdr = pkt_next->data + bus->tx_hdrlen - SDPCM_SWHDR_LEN;
2226 dat_offset = le32_to_cpu(*(__le32 *)hdr);
2227 dat_offset = (dat_offset & SDPCM_DOFFSET_MASK) >>
2228 SDPCM_DOFFSET_SHIFT;
2229 skb_pull(pkt_next, dat_offset);
2230 if (bus->txglom) {
2231 tail_pad = le16_to_cpu(*(__le16 *)(hdr - 2));
2232 skb_trim(pkt_next, pkt_next->len - tail_pad);
2233 }
2234 }
2235 }
2236 }
2237
2238 /* Writes a HW/SW header into the packet and sends it. */
2239 /* Assumes: (a) header space already there, (b) caller holds lock */
2240 static int brcmf_sdio_txpkt(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
2241 uint chan)
2242 {
2243 int ret;
2244 struct sk_buff *pkt_next, *tmp;
2245
2246 brcmf_dbg(TRACE, "Enter\n");
2247
2248 ret = brcmf_sdio_txpkt_prep(bus, pktq, chan);
2249 if (ret)
2250 goto done;
2251
2252 sdio_claim_host(bus->sdiodev->func[1]);
2253 ret = brcmf_sdiod_send_pkt(bus->sdiodev, pktq);
2254 bus->sdcnt.f2txdata++;
2255
2256 if (ret < 0)
2257 brcmf_sdio_txfail(bus);
2258
2259 sdio_release_host(bus->sdiodev->func[1]);
2260
2261 done:
2262 brcmf_sdio_txpkt_postp(bus, pktq);
2263 if (ret == 0)
2264 bus->tx_seq = (bus->tx_seq + pktq->qlen) % SDPCM_SEQ_WRAP;
2265 skb_queue_walk_safe(pktq, pkt_next, tmp) {
2266 __skb_unlink(pkt_next, pktq);
2267 brcmf_txcomplete(bus->sdiodev->dev, pkt_next, ret == 0);
2268 }
2269 return ret;
2270 }
2271
2272 static uint brcmf_sdio_sendfromq(struct brcmf_sdio *bus, uint maxframes)
2273 {
2274 struct sk_buff *pkt;
2275 struct sk_buff_head pktq;
2276 u32 intstatus = 0;
2277 int ret = 0, prec_out, i;
2278 uint cnt = 0;
2279 u8 tx_prec_map, pkt_num;
2280
2281 brcmf_dbg(TRACE, "Enter\n");
2282
2283 tx_prec_map = ~bus->flowcontrol;
2284
2285 /* Send frames until the limit or some other event */
2286 for (cnt = 0; (cnt < maxframes) && data_ok(bus);) {
2287 pkt_num = 1;
2288 if (bus->txglom)
2289 pkt_num = min_t(u8, bus->tx_max - bus->tx_seq,
2290 bus->sdiodev->txglomsz);
2291 pkt_num = min_t(u32, pkt_num,
2292 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol));
2293 __skb_queue_head_init(&pktq);
2294 spin_lock_bh(&bus->txq_lock);
2295 for (i = 0; i < pkt_num; i++) {
2296 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map,
2297 &prec_out);
2298 if (pkt == NULL)
2299 break;
2300 __skb_queue_tail(&pktq, pkt);
2301 }
2302 spin_unlock_bh(&bus->txq_lock);
2303 if (i == 0)
2304 break;
2305
2306 ret = brcmf_sdio_txpkt(bus, &pktq, SDPCM_DATA_CHANNEL);
2307
2308 cnt += i;
2309
2310 /* In poll mode, need to check for other events */
2311 if (!bus->intr) {
2312 /* Check device status, signal pending interrupt */
2313 sdio_claim_host(bus->sdiodev->func[1]);
2314 ret = r_sdreg32(bus, &intstatus,
2315 offsetof(struct sdpcmd_regs,
2316 intstatus));
2317 sdio_release_host(bus->sdiodev->func[1]);
2318 bus->sdcnt.f2txdata++;
2319 if (ret != 0)
2320 break;
2321 if (intstatus & bus->hostintmask)
2322 atomic_set(&bus->ipend, 1);
2323 }
2324 }
2325
2326 /* Deflow-control stack if needed */
2327 if ((bus->sdiodev->state == BRCMF_SDIOD_DATA) &&
2328 bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
2329 bus->txoff = false;
2330 brcmf_txflowblock(bus->sdiodev->dev, false);
2331 }
2332
2333 return cnt;
2334 }
2335
2336 static int brcmf_sdio_tx_ctrlframe(struct brcmf_sdio *bus, u8 *frame, u16 len)
2337 {
2338 u8 doff;
2339 u16 pad;
2340 uint retries = 0;
2341 struct brcmf_sdio_hdrinfo hd_info = {0};
2342 int ret;
2343
2344 brcmf_dbg(TRACE, "Enter\n");
2345
2346 /* Back the pointer to make room for bus header */
2347 frame -= bus->tx_hdrlen;
2348 len += bus->tx_hdrlen;
2349
2350 /* Add alignment padding (optional for ctl frames) */
2351 doff = ((unsigned long)frame % bus->head_align);
2352 if (doff) {
2353 frame -= doff;
2354 len += doff;
2355 memset(frame + bus->tx_hdrlen, 0, doff);
2356 }
2357
2358 /* Round send length to next SDIO block */
2359 pad = 0;
2360 if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2361 pad = bus->blocksize - (len % bus->blocksize);
2362 if ((pad > bus->roundup) || (pad >= bus->blocksize))
2363 pad = 0;
2364 } else if (len % bus->head_align) {
2365 pad = bus->head_align - (len % bus->head_align);
2366 }
2367 len += pad;
2368
2369 hd_info.len = len - pad;
2370 hd_info.channel = SDPCM_CONTROL_CHANNEL;
2371 hd_info.dat_offset = doff + bus->tx_hdrlen;
2372 hd_info.seq_num = bus->tx_seq;
2373 hd_info.lastfrm = true;
2374 hd_info.tail_pad = pad;
2375 brcmf_sdio_hdpack(bus, frame, &hd_info);
2376
2377 if (bus->txglom)
2378 brcmf_sdio_update_hwhdr(frame, len);
2379
2380 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
2381 frame, len, "Tx Frame:\n");
2382 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
2383 BRCMF_HDRS_ON(),
2384 frame, min_t(u16, len, 16), "TxHdr:\n");
2385
2386 do {
2387 ret = brcmf_sdiod_send_buf(bus->sdiodev, frame, len);
2388
2389 if (ret < 0)
2390 brcmf_sdio_txfail(bus);
2391 else
2392 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
2393 } while (ret < 0 && retries++ < TXRETRIES);
2394
2395 return ret;
2396 }
2397
2398 static void brcmf_sdio_bus_stop(struct device *dev)
2399 {
2400 u32 local_hostintmask;
2401 u8 saveclk;
2402 int err;
2403 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2404 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2405 struct brcmf_sdio *bus = sdiodev->bus;
2406
2407 brcmf_dbg(TRACE, "Enter\n");
2408
2409 if (bus->watchdog_tsk) {
2410 send_sig(SIGTERM, bus->watchdog_tsk, 1);
2411 kthread_stop(bus->watchdog_tsk);
2412 bus->watchdog_tsk = NULL;
2413 }
2414
2415 if (sdiodev->state != BRCMF_SDIOD_NOMEDIUM) {
2416 sdio_claim_host(sdiodev->func[1]);
2417
2418 /* Enable clock for device interrupts */
2419 brcmf_sdio_bus_sleep(bus, false, false);
2420
2421 /* Disable and clear interrupts at the chip level also */
2422 w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask));
2423 local_hostintmask = bus->hostintmask;
2424 bus->hostintmask = 0;
2425
2426 /* Force backplane clocks to assure F2 interrupt propagates */
2427 saveclk = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2428 &err);
2429 if (!err)
2430 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2431 (saveclk | SBSDIO_FORCE_HT), &err);
2432 if (err)
2433 brcmf_err("Failed to force clock for F2: err %d\n",
2434 err);
2435
2436 /* Turn off the bus (F2), free any pending packets */
2437 brcmf_dbg(INTR, "disable SDIO interrupts\n");
2438 sdio_disable_func(sdiodev->func[SDIO_FUNC_2]);
2439
2440 /* Clear any pending interrupts now that F2 is disabled */
2441 w_sdreg32(bus, local_hostintmask,
2442 offsetof(struct sdpcmd_regs, intstatus));
2443
2444 sdio_release_host(sdiodev->func[1]);
2445 }
2446 /* Clear the data packet queues */
2447 brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
2448
2449 /* Clear any held glomming stuff */
2450 brcmu_pkt_buf_free_skb(bus->glomd);
2451 brcmf_sdio_free_glom(bus);
2452
2453 /* Clear rx control and wake any waiters */
2454 spin_lock_bh(&bus->rxctl_lock);
2455 bus->rxlen = 0;
2456 spin_unlock_bh(&bus->rxctl_lock);
2457 brcmf_sdio_dcmd_resp_wake(bus);
2458
2459 /* Reset some F2 state stuff */
2460 bus->rxskip = false;
2461 bus->tx_seq = bus->rx_seq = 0;
2462 }
2463
2464 static inline void brcmf_sdio_clrintr(struct brcmf_sdio *bus)
2465 {
2466 struct brcmf_sdio_dev *sdiodev;
2467 unsigned long flags;
2468
2469 sdiodev = bus->sdiodev;
2470 if (sdiodev->oob_irq_requested) {
2471 spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
2472 if (!sdiodev->irq_en && !atomic_read(&bus->ipend)) {
2473 enable_irq(sdiodev->settings->bus.sdio.oob_irq_nr);
2474 sdiodev->irq_en = true;
2475 }
2476 spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
2477 }
2478 }
2479
2480 static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus)
2481 {
2482 struct brcmf_core *buscore;
2483 u32 addr;
2484 unsigned long val;
2485 int ret;
2486
2487 buscore = brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV);
2488 addr = buscore->base + offsetof(struct sdpcmd_regs, intstatus);
2489
2490 val = brcmf_sdiod_regrl(bus->sdiodev, addr, &ret);
2491 bus->sdcnt.f1regdata++;
2492 if (ret != 0)
2493 return ret;
2494
2495 val &= bus->hostintmask;
2496 atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE));
2497
2498 /* Clear interrupts */
2499 if (val) {
2500 brcmf_sdiod_regwl(bus->sdiodev, addr, val, &ret);
2501 bus->sdcnt.f1regdata++;
2502 atomic_or(val, &bus->intstatus);
2503 }
2504
2505 return ret;
2506 }
2507
2508 static void brcmf_sdio_dpc(struct brcmf_sdio *bus)
2509 {
2510 u32 newstatus = 0;
2511 unsigned long intstatus;
2512 uint txlimit = bus->txbound; /* Tx frames to send before resched */
2513 uint framecnt; /* Temporary counter of tx/rx frames */
2514 int err = 0;
2515
2516 brcmf_dbg(TRACE, "Enter\n");
2517
2518 sdio_claim_host(bus->sdiodev->func[1]);
2519
2520 /* If waiting for HTAVAIL, check status */
2521 if (!bus->sr_enabled && bus->clkstate == CLK_PENDING) {
2522 u8 clkctl, devctl = 0;
2523
2524 #ifdef DEBUG
2525 /* Check for inconsistent device control */
2526 devctl = brcmf_sdiod_regrb(bus->sdiodev,
2527 SBSDIO_DEVICE_CTL, &err);
2528 #endif /* DEBUG */
2529
2530 /* Read CSR, if clock on switch to AVAIL, else ignore */
2531 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
2532 SBSDIO_FUNC1_CHIPCLKCSR, &err);
2533
2534 brcmf_dbg(SDIO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2535 devctl, clkctl);
2536
2537 if (SBSDIO_HTAV(clkctl)) {
2538 devctl = brcmf_sdiod_regrb(bus->sdiodev,
2539 SBSDIO_DEVICE_CTL, &err);
2540 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
2541 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
2542 devctl, &err);
2543 bus->clkstate = CLK_AVAIL;
2544 }
2545 }
2546
2547 /* Make sure backplane clock is on */
2548 brcmf_sdio_bus_sleep(bus, false, true);
2549
2550 /* Pending interrupt indicates new device status */
2551 if (atomic_read(&bus->ipend) > 0) {
2552 atomic_set(&bus->ipend, 0);
2553 err = brcmf_sdio_intr_rstatus(bus);
2554 }
2555
2556 /* Start with leftover status bits */
2557 intstatus = atomic_xchg(&bus->intstatus, 0);
2558
2559 /* Handle flow-control change: read new state in case our ack
2560 * crossed another change interrupt. If change still set, assume
2561 * FC ON for safety, let next loop through do the debounce.
2562 */
2563 if (intstatus & I_HMB_FC_CHANGE) {
2564 intstatus &= ~I_HMB_FC_CHANGE;
2565 err = w_sdreg32(bus, I_HMB_FC_CHANGE,
2566 offsetof(struct sdpcmd_regs, intstatus));
2567
2568 err = r_sdreg32(bus, &newstatus,
2569 offsetof(struct sdpcmd_regs, intstatus));
2570 bus->sdcnt.f1regdata += 2;
2571 atomic_set(&bus->fcstate,
2572 !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)));
2573 intstatus |= (newstatus & bus->hostintmask);
2574 }
2575
2576 /* Handle host mailbox indication */
2577 if (intstatus & I_HMB_HOST_INT) {
2578 intstatus &= ~I_HMB_HOST_INT;
2579 intstatus |= brcmf_sdio_hostmail(bus);
2580 }
2581
2582 sdio_release_host(bus->sdiodev->func[1]);
2583
2584 /* Generally don't ask for these, can get CRC errors... */
2585 if (intstatus & I_WR_OOSYNC) {
2586 brcmf_err("Dongle reports WR_OOSYNC\n");
2587 intstatus &= ~I_WR_OOSYNC;
2588 }
2589
2590 if (intstatus & I_RD_OOSYNC) {
2591 brcmf_err("Dongle reports RD_OOSYNC\n");
2592 intstatus &= ~I_RD_OOSYNC;
2593 }
2594
2595 if (intstatus & I_SBINT) {
2596 brcmf_err("Dongle reports SBINT\n");
2597 intstatus &= ~I_SBINT;
2598 }
2599
2600 /* Would be active due to wake-wlan in gSPI */
2601 if (intstatus & I_CHIPACTIVE) {
2602 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2603 intstatus &= ~I_CHIPACTIVE;
2604 }
2605
2606 /* Ignore frame indications if rxskip is set */
2607 if (bus->rxskip)
2608 intstatus &= ~I_HMB_FRAME_IND;
2609
2610 /* On frame indication, read available frames */
2611 if ((intstatus & I_HMB_FRAME_IND) && (bus->clkstate == CLK_AVAIL)) {
2612 brcmf_sdio_readframes(bus, bus->rxbound);
2613 if (!bus->rxpending)
2614 intstatus &= ~I_HMB_FRAME_IND;
2615 }
2616
2617 /* Keep still-pending events for next scheduling */
2618 if (intstatus)
2619 atomic_or(intstatus, &bus->intstatus);
2620
2621 brcmf_sdio_clrintr(bus);
2622
2623 if (bus->ctrl_frame_stat && (bus->clkstate == CLK_AVAIL) &&
2624 data_ok(bus)) {
2625 sdio_claim_host(bus->sdiodev->func[1]);
2626 if (bus->ctrl_frame_stat) {
2627 err = brcmf_sdio_tx_ctrlframe(bus, bus->ctrl_frame_buf,
2628 bus->ctrl_frame_len);
2629 bus->ctrl_frame_err = err;
2630 wmb();
2631 bus->ctrl_frame_stat = false;
2632 }
2633 sdio_release_host(bus->sdiodev->func[1]);
2634 brcmf_sdio_wait_event_wakeup(bus);
2635 }
2636 /* Send queued frames (limit 1 if rx may still be pending) */
2637 if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
2638 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit &&
2639 data_ok(bus)) {
2640 framecnt = bus->rxpending ? min(txlimit, bus->txminmax) :
2641 txlimit;
2642 brcmf_sdio_sendfromq(bus, framecnt);
2643 }
2644
2645 if ((bus->sdiodev->state != BRCMF_SDIOD_DATA) || (err != 0)) {
2646 brcmf_err("failed backplane access over SDIO, halting operation\n");
2647 atomic_set(&bus->intstatus, 0);
2648 if (bus->ctrl_frame_stat) {
2649 sdio_claim_host(bus->sdiodev->func[1]);
2650 if (bus->ctrl_frame_stat) {
2651 bus->ctrl_frame_err = -ENODEV;
2652 wmb();
2653 bus->ctrl_frame_stat = false;
2654 brcmf_sdio_wait_event_wakeup(bus);
2655 }
2656 sdio_release_host(bus->sdiodev->func[1]);
2657 }
2658 } else if (atomic_read(&bus->intstatus) ||
2659 atomic_read(&bus->ipend) > 0 ||
2660 (!atomic_read(&bus->fcstate) &&
2661 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
2662 data_ok(bus))) {
2663 bus->dpc_triggered = true;
2664 }
2665 }
2666
2667 static struct pktq *brcmf_sdio_bus_gettxq(struct device *dev)
2668 {
2669 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2670 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2671 struct brcmf_sdio *bus = sdiodev->bus;
2672
2673 return &bus->txq;
2674 }
2675
2676 static bool brcmf_sdio_prec_enq(struct pktq *q, struct sk_buff *pkt, int prec)
2677 {
2678 struct sk_buff *p;
2679 int eprec = -1; /* precedence to evict from */
2680
2681 /* Fast case, precedence queue is not full and we are also not
2682 * exceeding total queue length
2683 */
2684 if (!pktq_pfull(q, prec) && !pktq_full(q)) {
2685 brcmu_pktq_penq(q, prec, pkt);
2686 return true;
2687 }
2688
2689 /* Determine precedence from which to evict packet, if any */
2690 if (pktq_pfull(q, prec)) {
2691 eprec = prec;
2692 } else if (pktq_full(q)) {
2693 p = brcmu_pktq_peek_tail(q, &eprec);
2694 if (eprec > prec)
2695 return false;
2696 }
2697
2698 /* Evict if needed */
2699 if (eprec >= 0) {
2700 /* Detect queueing to unconfigured precedence */
2701 if (eprec == prec)
2702 return false; /* refuse newer (incoming) packet */
2703 /* Evict packet according to discard policy */
2704 p = brcmu_pktq_pdeq_tail(q, eprec);
2705 if (p == NULL)
2706 brcmf_err("brcmu_pktq_pdeq_tail() failed\n");
2707 brcmu_pkt_buf_free_skb(p);
2708 }
2709
2710 /* Enqueue */
2711 p = brcmu_pktq_penq(q, prec, pkt);
2712 if (p == NULL)
2713 brcmf_err("brcmu_pktq_penq() failed\n");
2714
2715 return p != NULL;
2716 }
2717
2718 static int brcmf_sdio_bus_txdata(struct device *dev, struct sk_buff *pkt)
2719 {
2720 int ret = -EBADE;
2721 uint prec;
2722 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2723 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2724 struct brcmf_sdio *bus = sdiodev->bus;
2725
2726 brcmf_dbg(TRACE, "Enter: pkt: data %p len %d\n", pkt->data, pkt->len);
2727 if (sdiodev->state != BRCMF_SDIOD_DATA)
2728 return -EIO;
2729
2730 /* Add space for the header */
2731 skb_push(pkt, bus->tx_hdrlen);
2732 /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2733
2734 prec = prio2prec((pkt->priority & PRIOMASK));
2735
2736 /* Check for existing queue, current flow-control,
2737 pending event, or pending clock */
2738 brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
2739 bus->sdcnt.fcqueued++;
2740
2741 /* Priority based enq */
2742 spin_lock_bh(&bus->txq_lock);
2743 /* reset bus_flags in packet cb */
2744 *(u16 *)(pkt->cb) = 0;
2745 if (!brcmf_sdio_prec_enq(&bus->txq, pkt, prec)) {
2746 skb_pull(pkt, bus->tx_hdrlen);
2747 brcmf_err("out of bus->txq !!!\n");
2748 ret = -ENOSR;
2749 } else {
2750 ret = 0;
2751 }
2752
2753 if (pktq_len(&bus->txq) >= TXHI) {
2754 bus->txoff = true;
2755 brcmf_txflowblock(dev, true);
2756 }
2757 spin_unlock_bh(&bus->txq_lock);
2758
2759 #ifdef DEBUG
2760 if (pktq_plen(&bus->txq, prec) > qcount[prec])
2761 qcount[prec] = pktq_plen(&bus->txq, prec);
2762 #endif
2763
2764 brcmf_sdio_trigger_dpc(bus);
2765 return ret;
2766 }
2767
2768 #ifdef DEBUG
2769 #define CONSOLE_LINE_MAX 192
2770
2771 static int brcmf_sdio_readconsole(struct brcmf_sdio *bus)
2772 {
2773 struct brcmf_console *c = &bus->console;
2774 u8 line[CONSOLE_LINE_MAX], ch;
2775 u32 n, idx, addr;
2776 int rv;
2777
2778 /* Don't do anything until FWREADY updates console address */
2779 if (bus->console_addr == 0)
2780 return 0;
2781
2782 /* Read console log struct */
2783 addr = bus->console_addr + offsetof(struct rte_console, log_le);
2784 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&c->log_le,
2785 sizeof(c->log_le));
2786 if (rv < 0)
2787 return rv;
2788
2789 /* Allocate console buffer (one time only) */
2790 if (c->buf == NULL) {
2791 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2792 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2793 if (c->buf == NULL)
2794 return -ENOMEM;
2795 }
2796
2797 idx = le32_to_cpu(c->log_le.idx);
2798
2799 /* Protect against corrupt value */
2800 if (idx > c->bufsize)
2801 return -EBADE;
2802
2803 /* Skip reading the console buffer if the index pointer
2804 has not moved */
2805 if (idx == c->last)
2806 return 0;
2807
2808 /* Read the console buffer */
2809 addr = le32_to_cpu(c->log_le.buf);
2810 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, c->buf, c->bufsize);
2811 if (rv < 0)
2812 return rv;
2813
2814 while (c->last != idx) {
2815 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2816 if (c->last == idx) {
2817 /* This would output a partial line.
2818 * Instead, back up
2819 * the buffer pointer and output this
2820 * line next time around.
2821 */
2822 if (c->last >= n)
2823 c->last -= n;
2824 else
2825 c->last = c->bufsize - n;
2826 goto break2;
2827 }
2828 ch = c->buf[c->last];
2829 c->last = (c->last + 1) % c->bufsize;
2830 if (ch == '\n')
2831 break;
2832 line[n] = ch;
2833 }
2834
2835 if (n > 0) {
2836 if (line[n - 1] == '\r')
2837 n--;
2838 line[n] = 0;
2839 pr_debug("CONSOLE: %s\n", line);
2840 }
2841 }
2842 break2:
2843
2844 return 0;
2845 }
2846 #endif /* DEBUG */
2847
2848 static int
2849 brcmf_sdio_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
2850 {
2851 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2852 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2853 struct brcmf_sdio *bus = sdiodev->bus;
2854 int ret;
2855
2856 brcmf_dbg(TRACE, "Enter\n");
2857 if (sdiodev->state != BRCMF_SDIOD_DATA)
2858 return -EIO;
2859
2860 /* Send from dpc */
2861 bus->ctrl_frame_buf = msg;
2862 bus->ctrl_frame_len = msglen;
2863 wmb();
2864 bus->ctrl_frame_stat = true;
2865
2866 brcmf_sdio_trigger_dpc(bus);
2867 wait_event_interruptible_timeout(bus->ctrl_wait, !bus->ctrl_frame_stat,
2868 CTL_DONE_TIMEOUT);
2869 ret = 0;
2870 if (bus->ctrl_frame_stat) {
2871 sdio_claim_host(bus->sdiodev->func[1]);
2872 if (bus->ctrl_frame_stat) {
2873 brcmf_dbg(SDIO, "ctrl_frame timeout\n");
2874 bus->ctrl_frame_stat = false;
2875 ret = -ETIMEDOUT;
2876 }
2877 sdio_release_host(bus->sdiodev->func[1]);
2878 }
2879 if (!ret) {
2880 brcmf_dbg(SDIO, "ctrl_frame complete, err=%d\n",
2881 bus->ctrl_frame_err);
2882 rmb();
2883 ret = bus->ctrl_frame_err;
2884 }
2885
2886 if (ret)
2887 bus->sdcnt.tx_ctlerrs++;
2888 else
2889 bus->sdcnt.tx_ctlpkts++;
2890
2891 return ret;
2892 }
2893
2894 #ifdef DEBUG
2895 static int brcmf_sdio_dump_console(struct seq_file *seq, struct brcmf_sdio *bus,
2896 struct sdpcm_shared *sh)
2897 {
2898 u32 addr, console_ptr, console_size, console_index;
2899 char *conbuf = NULL;
2900 __le32 sh_val;
2901 int rv;
2902
2903 /* obtain console information from device memory */
2904 addr = sh->console_addr + offsetof(struct rte_console, log_le);
2905 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2906 (u8 *)&sh_val, sizeof(u32));
2907 if (rv < 0)
2908 return rv;
2909 console_ptr = le32_to_cpu(sh_val);
2910
2911 addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
2912 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2913 (u8 *)&sh_val, sizeof(u32));
2914 if (rv < 0)
2915 return rv;
2916 console_size = le32_to_cpu(sh_val);
2917
2918 addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
2919 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2920 (u8 *)&sh_val, sizeof(u32));
2921 if (rv < 0)
2922 return rv;
2923 console_index = le32_to_cpu(sh_val);
2924
2925 /* allocate buffer for console data */
2926 if (console_size <= CONSOLE_BUFFER_MAX)
2927 conbuf = vzalloc(console_size+1);
2928
2929 if (!conbuf)
2930 return -ENOMEM;
2931
2932 /* obtain the console data from device */
2933 conbuf[console_size] = '\0';
2934 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, console_ptr, (u8 *)conbuf,
2935 console_size);
2936 if (rv < 0)
2937 goto done;
2938
2939 rv = seq_write(seq, conbuf + console_index,
2940 console_size - console_index);
2941 if (rv < 0)
2942 goto done;
2943
2944 if (console_index > 0)
2945 rv = seq_write(seq, conbuf, console_index - 1);
2946
2947 done:
2948 vfree(conbuf);
2949 return rv;
2950 }
2951
2952 static int brcmf_sdio_trap_info(struct seq_file *seq, struct brcmf_sdio *bus,
2953 struct sdpcm_shared *sh)
2954 {
2955 int error;
2956 struct brcmf_trap_info tr;
2957
2958 if ((sh->flags & SDPCM_SHARED_TRAP) == 0) {
2959 brcmf_dbg(INFO, "no trap in firmware\n");
2960 return 0;
2961 }
2962
2963 error = brcmf_sdiod_ramrw(bus->sdiodev, false, sh->trap_addr, (u8 *)&tr,
2964 sizeof(struct brcmf_trap_info));
2965 if (error < 0)
2966 return error;
2967
2968 seq_printf(seq,
2969 "dongle trap info: type 0x%x @ epc 0x%08x\n"
2970 " cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
2971 " lr 0x%08x pc 0x%08x offset 0x%x\n"
2972 " r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n"
2973 " r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n",
2974 le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
2975 le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
2976 le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
2977 le32_to_cpu(tr.pc), sh->trap_addr,
2978 le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
2979 le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
2980 le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
2981 le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));
2982
2983 return 0;
2984 }
2985
2986 static int brcmf_sdio_assert_info(struct seq_file *seq, struct brcmf_sdio *bus,
2987 struct sdpcm_shared *sh)
2988 {
2989 int error = 0;
2990 char file[80] = "?";
2991 char expr[80] = "<???>";
2992
2993 if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
2994 brcmf_dbg(INFO, "firmware not built with -assert\n");
2995 return 0;
2996 } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
2997 brcmf_dbg(INFO, "no assert in dongle\n");
2998 return 0;
2999 }
3000
3001 sdio_claim_host(bus->sdiodev->func[1]);
3002 if (sh->assert_file_addr != 0) {
3003 error = brcmf_sdiod_ramrw(bus->sdiodev, false,
3004 sh->assert_file_addr, (u8 *)file, 80);
3005 if (error < 0)
3006 return error;
3007 }
3008 if (sh->assert_exp_addr != 0) {
3009 error = brcmf_sdiod_ramrw(bus->sdiodev, false,
3010 sh->assert_exp_addr, (u8 *)expr, 80);
3011 if (error < 0)
3012 return error;
3013 }
3014 sdio_release_host(bus->sdiodev->func[1]);
3015
3016 seq_printf(seq, "dongle assert: %s:%d: assert(%s)\n",
3017 file, sh->assert_line, expr);
3018 return 0;
3019 }
3020
3021 static int brcmf_sdio_checkdied(struct brcmf_sdio *bus)
3022 {
3023 int error;
3024 struct sdpcm_shared sh;
3025
3026 error = brcmf_sdio_readshared(bus, &sh);
3027
3028 if (error < 0)
3029 return error;
3030
3031 if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
3032 brcmf_dbg(INFO, "firmware not built with -assert\n");
3033 else if (sh.flags & SDPCM_SHARED_ASSERT)
3034 brcmf_err("assertion in dongle\n");
3035
3036 if (sh.flags & SDPCM_SHARED_TRAP)
3037 brcmf_err("firmware trap in dongle\n");
3038
3039 return 0;
3040 }
3041
3042 static int brcmf_sdio_died_dump(struct seq_file *seq, struct brcmf_sdio *bus)
3043 {
3044 int error = 0;
3045 struct sdpcm_shared sh;
3046
3047 error = brcmf_sdio_readshared(bus, &sh);
3048 if (error < 0)
3049 goto done;
3050
3051 error = brcmf_sdio_assert_info(seq, bus, &sh);
3052 if (error < 0)
3053 goto done;
3054
3055 error = brcmf_sdio_trap_info(seq, bus, &sh);
3056 if (error < 0)
3057 goto done;
3058
3059 error = brcmf_sdio_dump_console(seq, bus, &sh);
3060
3061 done:
3062 return error;
3063 }
3064
3065 static int brcmf_sdio_forensic_read(struct seq_file *seq, void *data)
3066 {
3067 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
3068 struct brcmf_sdio *bus = bus_if->bus_priv.sdio->bus;
3069
3070 return brcmf_sdio_died_dump(seq, bus);
3071 }
3072
3073 static int brcmf_debugfs_sdio_count_read(struct seq_file *seq, void *data)
3074 {
3075 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
3076 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3077 struct brcmf_sdio_count *sdcnt = &sdiodev->bus->sdcnt;
3078
3079 seq_printf(seq,
3080 "intrcount: %u\nlastintrs: %u\n"
3081 "pollcnt: %u\nregfails: %u\n"
3082 "tx_sderrs: %u\nfcqueued: %u\n"
3083 "rxrtx: %u\nrx_toolong: %u\n"
3084 "rxc_errors: %u\nrx_hdrfail: %u\n"
3085 "rx_badhdr: %u\nrx_badseq: %u\n"
3086 "fc_rcvd: %u\nfc_xoff: %u\n"
3087 "fc_xon: %u\nrxglomfail: %u\n"
3088 "rxglomframes: %u\nrxglompkts: %u\n"
3089 "f2rxhdrs: %u\nf2rxdata: %u\n"
3090 "f2txdata: %u\nf1regdata: %u\n"
3091 "tickcnt: %u\ntx_ctlerrs: %lu\n"
3092 "tx_ctlpkts: %lu\nrx_ctlerrs: %lu\n"
3093 "rx_ctlpkts: %lu\nrx_readahead: %lu\n",
3094 sdcnt->intrcount, sdcnt->lastintrs,
3095 sdcnt->pollcnt, sdcnt->regfails,
3096 sdcnt->tx_sderrs, sdcnt->fcqueued,
3097 sdcnt->rxrtx, sdcnt->rx_toolong,
3098 sdcnt->rxc_errors, sdcnt->rx_hdrfail,
3099 sdcnt->rx_badhdr, sdcnt->rx_badseq,
3100 sdcnt->fc_rcvd, sdcnt->fc_xoff,
3101 sdcnt->fc_xon, sdcnt->rxglomfail,
3102 sdcnt->rxglomframes, sdcnt->rxglompkts,
3103 sdcnt->f2rxhdrs, sdcnt->f2rxdata,
3104 sdcnt->f2txdata, sdcnt->f1regdata,
3105 sdcnt->tickcnt, sdcnt->tx_ctlerrs,
3106 sdcnt->tx_ctlpkts, sdcnt->rx_ctlerrs,
3107 sdcnt->rx_ctlpkts, sdcnt->rx_readahead_cnt);
3108
3109 return 0;
3110 }
3111
3112 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3113 {
3114 struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
3115 struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);
3116
3117 if (IS_ERR_OR_NULL(dentry))
3118 return;
3119
3120 bus->console_interval = BRCMF_CONSOLE;
3121
3122 brcmf_debugfs_add_entry(drvr, "forensics", brcmf_sdio_forensic_read);
3123 brcmf_debugfs_add_entry(drvr, "counters",
3124 brcmf_debugfs_sdio_count_read);
3125 debugfs_create_u32("console_interval", 0644, dentry,
3126 &bus->console_interval);
3127 }
3128 #else
3129 static int brcmf_sdio_checkdied(struct brcmf_sdio *bus)
3130 {
3131 return 0;
3132 }
3133
3134 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3135 {
3136 }
3137 #endif /* DEBUG */
3138
3139 static int
3140 brcmf_sdio_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
3141 {
3142 int timeleft;
3143 uint rxlen = 0;
3144 bool pending;
3145 u8 *buf;
3146 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3147 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3148 struct brcmf_sdio *bus = sdiodev->bus;
3149
3150 brcmf_dbg(TRACE, "Enter\n");
3151 if (sdiodev->state != BRCMF_SDIOD_DATA)
3152 return -EIO;
3153
3154 /* Wait until control frame is available */
3155 timeleft = brcmf_sdio_dcmd_resp_wait(bus, &bus->rxlen, &pending);
3156
3157 spin_lock_bh(&bus->rxctl_lock);
3158 rxlen = bus->rxlen;
3159 memcpy(msg, bus->rxctl, min(msglen, rxlen));
3160 bus->rxctl = NULL;
3161 buf = bus->rxctl_orig;
3162 bus->rxctl_orig = NULL;
3163 bus->rxlen = 0;
3164 spin_unlock_bh(&bus->rxctl_lock);
3165 vfree(buf);
3166
3167 if (rxlen) {
3168 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
3169 rxlen, msglen);
3170 } else if (timeleft == 0) {
3171 brcmf_err("resumed on timeout\n");
3172 brcmf_sdio_checkdied(bus);
3173 } else if (pending) {
3174 brcmf_dbg(CTL, "cancelled\n");
3175 return -ERESTARTSYS;
3176 } else {
3177 brcmf_dbg(CTL, "resumed for unknown reason?\n");
3178 brcmf_sdio_checkdied(bus);
3179 }
3180
3181 if (rxlen)
3182 bus->sdcnt.rx_ctlpkts++;
3183 else
3184 bus->sdcnt.rx_ctlerrs++;
3185
3186 return rxlen ? (int)rxlen : -ETIMEDOUT;
3187 }
3188
3189 #ifdef DEBUG
3190 static bool
3191 brcmf_sdio_verifymemory(struct brcmf_sdio_dev *sdiodev, u32 ram_addr,
3192 u8 *ram_data, uint ram_sz)
3193 {
3194 char *ram_cmp;
3195 int err;
3196 bool ret = true;
3197 int address;
3198 int offset;
3199 int len;
3200
3201 /* read back and verify */
3202 brcmf_dbg(INFO, "Compare RAM dl & ul at 0x%08x; size=%d\n", ram_addr,
3203 ram_sz);
3204 ram_cmp = kmalloc(MEMBLOCK, GFP_KERNEL);
3205 /* do not proceed while no memory but */
3206 if (!ram_cmp)
3207 return true;
3208
3209 address = ram_addr;
3210 offset = 0;
3211 while (offset < ram_sz) {
3212 len = ((offset + MEMBLOCK) < ram_sz) ? MEMBLOCK :
3213 ram_sz - offset;
3214 err = brcmf_sdiod_ramrw(sdiodev, false, address, ram_cmp, len);
3215 if (err) {
3216 brcmf_err("error %d on reading %d membytes at 0x%08x\n",
3217 err, len, address);
3218 ret = false;
3219 break;
3220 } else if (memcmp(ram_cmp, &ram_data[offset], len)) {
3221 brcmf_err("Downloaded RAM image is corrupted, block offset is %d, len is %d\n",
3222 offset, len);
3223 ret = false;
3224 break;
3225 }
3226 offset += len;
3227 address += len;
3228 }
3229
3230 kfree(ram_cmp);
3231
3232 return ret;
3233 }
3234 #else /* DEBUG */
3235 static bool
3236 brcmf_sdio_verifymemory(struct brcmf_sdio_dev *sdiodev, u32 ram_addr,
3237 u8 *ram_data, uint ram_sz)
3238 {
3239 return true;
3240 }
3241 #endif /* DEBUG */
3242
3243 static int brcmf_sdio_download_code_file(struct brcmf_sdio *bus,
3244 const struct firmware *fw)
3245 {
3246 int err;
3247
3248 brcmf_dbg(TRACE, "Enter\n");
3249
3250 err = brcmf_sdiod_ramrw(bus->sdiodev, true, bus->ci->rambase,
3251 (u8 *)fw->data, fw->size);
3252 if (err)
3253 brcmf_err("error %d on writing %d membytes at 0x%08x\n",
3254 err, (int)fw->size, bus->ci->rambase);
3255 else if (!brcmf_sdio_verifymemory(bus->sdiodev, bus->ci->rambase,
3256 (u8 *)fw->data, fw->size))
3257 err = -EIO;
3258
3259 return err;
3260 }
3261
3262 static int brcmf_sdio_download_nvram(struct brcmf_sdio *bus,
3263 void *vars, u32 varsz)
3264 {
3265 int address;
3266 int err;
3267
3268 brcmf_dbg(TRACE, "Enter\n");
3269
3270 address = bus->ci->ramsize - varsz + bus->ci->rambase;
3271 err = brcmf_sdiod_ramrw(bus->sdiodev, true, address, vars, varsz);
3272 if (err)
3273 brcmf_err("error %d on writing %d nvram bytes at 0x%08x\n",
3274 err, varsz, address);
3275 else if (!brcmf_sdio_verifymemory(bus->sdiodev, address, vars, varsz))
3276 err = -EIO;
3277
3278 return err;
3279 }
3280
3281 static int brcmf_sdio_download_firmware(struct brcmf_sdio *bus,
3282 const struct firmware *fw,
3283 void *nvram, u32 nvlen)
3284 {
3285 int bcmerror;
3286 u32 rstvec;
3287
3288 sdio_claim_host(bus->sdiodev->func[1]);
3289 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
3290
3291 rstvec = get_unaligned_le32(fw->data);
3292 brcmf_dbg(SDIO, "firmware rstvec: %x\n", rstvec);
3293
3294 bcmerror = brcmf_sdio_download_code_file(bus, fw);
3295 release_firmware(fw);
3296 if (bcmerror) {
3297 brcmf_err("dongle image file download failed\n");
3298 brcmf_fw_nvram_free(nvram);
3299 goto err;
3300 }
3301
3302 bcmerror = brcmf_sdio_download_nvram(bus, nvram, nvlen);
3303 brcmf_fw_nvram_free(nvram);
3304 if (bcmerror) {
3305 brcmf_err("dongle nvram file download failed\n");
3306 goto err;
3307 }
3308
3309 /* Take arm out of reset */
3310 if (!brcmf_chip_set_active(bus->ci, rstvec)) {
3311 brcmf_err("error getting out of ARM core reset\n");
3312 goto err;
3313 }
3314
3315 err:
3316 brcmf_sdio_clkctl(bus, CLK_SDONLY, false);
3317 sdio_release_host(bus->sdiodev->func[1]);
3318 return bcmerror;
3319 }
3320
3321 static void brcmf_sdio_sr_init(struct brcmf_sdio *bus)
3322 {
3323 int err = 0;
3324 u8 val;
3325
3326 brcmf_dbg(TRACE, "Enter\n");
3327
3328 val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, &err);
3329 if (err) {
3330 brcmf_err("error reading SBSDIO_FUNC1_WAKEUPCTRL\n");
3331 return;
3332 }
3333
3334 val |= 1 << SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT;
3335 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, val, &err);
3336 if (err) {
3337 brcmf_err("error writing SBSDIO_FUNC1_WAKEUPCTRL\n");
3338 return;
3339 }
3340
3341 /* Add CMD14 Support */
3342 brcmf_sdiod_regwb(bus->sdiodev, SDIO_CCCR_BRCM_CARDCAP,
3343 (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT |
3344 SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT),
3345 &err);
3346 if (err) {
3347 brcmf_err("error writing SDIO_CCCR_BRCM_CARDCAP\n");
3348 return;
3349 }
3350
3351 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3352 SBSDIO_FORCE_HT, &err);
3353 if (err) {
3354 brcmf_err("error writing SBSDIO_FUNC1_CHIPCLKCSR\n");
3355 return;
3356 }
3357
3358 /* set flag */
3359 bus->sr_enabled = true;
3360 brcmf_dbg(INFO, "SR enabled\n");
3361 }
3362
3363 /* enable KSO bit */
3364 static int brcmf_sdio_kso_init(struct brcmf_sdio *bus)
3365 {
3366 u8 val;
3367 int err = 0;
3368
3369 brcmf_dbg(TRACE, "Enter\n");
3370
3371 /* KSO bit added in SDIO core rev 12 */
3372 if (brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV)->rev < 12)
3373 return 0;
3374
3375 val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, &err);
3376 if (err) {
3377 brcmf_err("error reading SBSDIO_FUNC1_SLEEPCSR\n");
3378 return err;
3379 }
3380
3381 if (!(val & SBSDIO_FUNC1_SLEEPCSR_KSO_MASK)) {
3382 val |= (SBSDIO_FUNC1_SLEEPCSR_KSO_EN <<
3383 SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
3384 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
3385 val, &err);
3386 if (err) {
3387 brcmf_err("error writing SBSDIO_FUNC1_SLEEPCSR\n");
3388 return err;
3389 }
3390 }
3391
3392 return 0;
3393 }
3394
3395
3396 static int brcmf_sdio_bus_preinit(struct device *dev)
3397 {
3398 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3399 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3400 struct brcmf_sdio *bus = sdiodev->bus;
3401 uint pad_size;
3402 u32 value;
3403 int err;
3404
3405 /* the commands below use the terms tx and rx from
3406 * a device perspective, ie. bus:txglom affects the
3407 * bus transfers from device to host.
3408 */
3409 if (brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV)->rev < 12) {
3410 /* for sdio core rev < 12, disable txgloming */
3411 value = 0;
3412 err = brcmf_iovar_data_set(dev, "bus:txglom", &value,
3413 sizeof(u32));
3414 } else {
3415 /* otherwise, set txglomalign */
3416 value = sdiodev->settings->bus.sdio.sd_sgentry_align;
3417 /* SDIO ADMA requires at least 32 bit alignment */
3418 value = max_t(u32, value, 4);
3419 err = brcmf_iovar_data_set(dev, "bus:txglomalign", &value,
3420 sizeof(u32));
3421 }
3422
3423 if (err < 0)
3424 goto done;
3425
3426 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
3427 if (sdiodev->sg_support) {
3428 bus->txglom = false;
3429 value = 1;
3430 pad_size = bus->sdiodev->func[2]->cur_blksize << 1;
3431 err = brcmf_iovar_data_set(bus->sdiodev->dev, "bus:rxglom",
3432 &value, sizeof(u32));
3433 if (err < 0) {
3434 /* bus:rxglom is allowed to fail */
3435 err = 0;
3436 } else {
3437 bus->txglom = true;
3438 bus->tx_hdrlen += SDPCM_HWEXT_LEN;
3439 }
3440 }
3441 brcmf_bus_add_txhdrlen(bus->sdiodev->dev, bus->tx_hdrlen);
3442
3443 done:
3444 return err;
3445 }
3446
3447 static size_t brcmf_sdio_bus_get_ramsize(struct device *dev)
3448 {
3449 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3450 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3451 struct brcmf_sdio *bus = sdiodev->bus;
3452
3453 return bus->ci->ramsize - bus->ci->srsize;
3454 }
3455
3456 static int brcmf_sdio_bus_get_memdump(struct device *dev, void *data,
3457 size_t mem_size)
3458 {
3459 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3460 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3461 struct brcmf_sdio *bus = sdiodev->bus;
3462 int err;
3463 int address;
3464 int offset;
3465 int len;
3466
3467 brcmf_dbg(INFO, "dump at 0x%08x: size=%zu\n", bus->ci->rambase,
3468 mem_size);
3469
3470 address = bus->ci->rambase;
3471 offset = err = 0;
3472 sdio_claim_host(sdiodev->func[1]);
3473 while (offset < mem_size) {
3474 len = ((offset + MEMBLOCK) < mem_size) ? MEMBLOCK :
3475 mem_size - offset;
3476 err = brcmf_sdiod_ramrw(sdiodev, false, address, data, len);
3477 if (err) {
3478 brcmf_err("error %d on reading %d membytes at 0x%08x\n",
3479 err, len, address);
3480 goto done;
3481 }
3482 data += len;
3483 offset += len;
3484 address += len;
3485 }
3486
3487 done:
3488 sdio_release_host(sdiodev->func[1]);
3489 return err;
3490 }
3491
3492 void brcmf_sdio_trigger_dpc(struct brcmf_sdio *bus)
3493 {
3494 if (!bus->dpc_triggered) {
3495 bus->dpc_triggered = true;
3496 queue_work(bus->brcmf_wq, &bus->datawork);
3497 }
3498 }
3499
3500 void brcmf_sdio_isr(struct brcmf_sdio *bus)
3501 {
3502 brcmf_dbg(TRACE, "Enter\n");
3503
3504 if (!bus) {
3505 brcmf_err("bus is null pointer, exiting\n");
3506 return;
3507 }
3508
3509 /* Count the interrupt call */
3510 bus->sdcnt.intrcount++;
3511 if (in_interrupt())
3512 atomic_set(&bus->ipend, 1);
3513 else
3514 if (brcmf_sdio_intr_rstatus(bus)) {
3515 brcmf_err("failed backplane access\n");
3516 }
3517
3518 /* Disable additional interrupts (is this needed now)? */
3519 if (!bus->intr)
3520 brcmf_err("isr w/o interrupt configured!\n");
3521
3522 bus->dpc_triggered = true;
3523 queue_work(bus->brcmf_wq, &bus->datawork);
3524 }
3525
3526 static void brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus)
3527 {
3528 brcmf_dbg(TIMER, "Enter\n");
3529
3530 /* Poll period: check device if appropriate. */
3531 if (!bus->sr_enabled &&
3532 bus->poll && (++bus->polltick >= bus->pollrate)) {
3533 u32 intstatus = 0;
3534
3535 /* Reset poll tick */
3536 bus->polltick = 0;
3537
3538 /* Check device if no interrupts */
3539 if (!bus->intr ||
3540 (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {
3541
3542 if (!bus->dpc_triggered) {
3543 u8 devpend;
3544
3545 sdio_claim_host(bus->sdiodev->func[1]);
3546 devpend = brcmf_sdiod_regrb(bus->sdiodev,
3547 SDIO_CCCR_INTx,
3548 NULL);
3549 sdio_release_host(bus->sdiodev->func[1]);
3550 intstatus = devpend & (INTR_STATUS_FUNC1 |
3551 INTR_STATUS_FUNC2);
3552 }
3553
3554 /* If there is something, make like the ISR and
3555 schedule the DPC */
3556 if (intstatus) {
3557 bus->sdcnt.pollcnt++;
3558 atomic_set(&bus->ipend, 1);
3559
3560 bus->dpc_triggered = true;
3561 queue_work(bus->brcmf_wq, &bus->datawork);
3562 }
3563 }
3564
3565 /* Update interrupt tracking */
3566 bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
3567 }
3568 #ifdef DEBUG
3569 /* Poll for console output periodically */
3570 if (bus->sdiodev->state == BRCMF_SDIOD_DATA && BRCMF_FWCON_ON() &&
3571 bus->console_interval != 0) {
3572 bus->console.count += jiffies_to_msecs(BRCMF_WD_POLL);
3573 if (bus->console.count >= bus->console_interval) {
3574 bus->console.count -= bus->console_interval;
3575 sdio_claim_host(bus->sdiodev->func[1]);
3576 /* Make sure backplane clock is on */
3577 brcmf_sdio_bus_sleep(bus, false, false);
3578 if (brcmf_sdio_readconsole(bus) < 0)
3579 /* stop on error */
3580 bus->console_interval = 0;
3581 sdio_release_host(bus->sdiodev->func[1]);
3582 }
3583 }
3584 #endif /* DEBUG */
3585
3586 /* On idle timeout clear activity flag and/or turn off clock */
3587 if (!bus->dpc_triggered) {
3588 rmb();
3589 if ((!bus->dpc_running) && (bus->idletime > 0) &&
3590 (bus->clkstate == CLK_AVAIL)) {
3591 bus->idlecount++;
3592 if (bus->idlecount > bus->idletime) {
3593 brcmf_dbg(SDIO, "idle\n");
3594 sdio_claim_host(bus->sdiodev->func[1]);
3595 brcmf_sdio_wd_timer(bus, false);
3596 bus->idlecount = 0;
3597 brcmf_sdio_bus_sleep(bus, true, false);
3598 sdio_release_host(bus->sdiodev->func[1]);
3599 }
3600 } else {
3601 bus->idlecount = 0;
3602 }
3603 } else {
3604 bus->idlecount = 0;
3605 }
3606 }
3607
3608 static void brcmf_sdio_dataworker(struct work_struct *work)
3609 {
3610 struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
3611 datawork);
3612
3613 bus->dpc_running = true;
3614 wmb();
3615 while (ACCESS_ONCE(bus->dpc_triggered)) {
3616 bus->dpc_triggered = false;
3617 brcmf_sdio_dpc(bus);
3618 bus->idlecount = 0;
3619 }
3620 bus->dpc_running = false;
3621 if (brcmf_sdiod_freezing(bus->sdiodev)) {
3622 brcmf_sdiod_change_state(bus->sdiodev, BRCMF_SDIOD_DOWN);
3623 brcmf_sdiod_try_freeze(bus->sdiodev);
3624 brcmf_sdiod_change_state(bus->sdiodev, BRCMF_SDIOD_DATA);
3625 }
3626 }
3627
3628 static void
3629 brcmf_sdio_drivestrengthinit(struct brcmf_sdio_dev *sdiodev,
3630 struct brcmf_chip *ci, u32 drivestrength)
3631 {
3632 const struct sdiod_drive_str *str_tab = NULL;
3633 u32 str_mask;
3634 u32 str_shift;
3635 u32 i;
3636 u32 drivestrength_sel = 0;
3637 u32 cc_data_temp;
3638 u32 addr;
3639
3640 if (!(ci->cc_caps & CC_CAP_PMU))
3641 return;
3642
3643 switch (SDIOD_DRVSTR_KEY(ci->chip, ci->pmurev)) {
3644 case SDIOD_DRVSTR_KEY(BRCM_CC_4330_CHIP_ID, 12):
3645 str_tab = sdiod_drvstr_tab1_1v8;
3646 str_mask = 0x00003800;
3647 str_shift = 11;
3648 break;
3649 case SDIOD_DRVSTR_KEY(BRCM_CC_4334_CHIP_ID, 17):
3650 str_tab = sdiod_drvstr_tab6_1v8;
3651 str_mask = 0x00001800;
3652 str_shift = 11;
3653 break;
3654 case SDIOD_DRVSTR_KEY(BRCM_CC_43143_CHIP_ID, 17):
3655 /* note: 43143 does not support tristate */
3656 i = ARRAY_SIZE(sdiod_drvstr_tab2_3v3) - 1;
3657 if (drivestrength >= sdiod_drvstr_tab2_3v3[i].strength) {
3658 str_tab = sdiod_drvstr_tab2_3v3;
3659 str_mask = 0x00000007;
3660 str_shift = 0;
3661 } else
3662 brcmf_err("Invalid SDIO Drive strength for chip %s, strength=%d\n",
3663 ci->name, drivestrength);
3664 break;
3665 case SDIOD_DRVSTR_KEY(BRCM_CC_43362_CHIP_ID, 13):
3666 str_tab = sdiod_drive_strength_tab5_1v8;
3667 str_mask = 0x00003800;
3668 str_shift = 11;
3669 break;
3670 default:
3671 brcmf_dbg(INFO, "No SDIO driver strength init needed for chip %s rev %d pmurev %d\n",
3672 ci->name, ci->chiprev, ci->pmurev);
3673 break;
3674 }
3675
3676 if (str_tab != NULL) {
3677 struct brcmf_core *pmu = brcmf_chip_get_pmu(ci);
3678
3679 for (i = 0; str_tab[i].strength != 0; i++) {
3680 if (drivestrength >= str_tab[i].strength) {
3681 drivestrength_sel = str_tab[i].sel;
3682 break;
3683 }
3684 }
3685 addr = CORE_CC_REG(pmu->base, chipcontrol_addr);
3686 brcmf_sdiod_regwl(sdiodev, addr, 1, NULL);
3687 cc_data_temp = brcmf_sdiod_regrl(sdiodev, addr, NULL);
3688 cc_data_temp &= ~str_mask;
3689 drivestrength_sel <<= str_shift;
3690 cc_data_temp |= drivestrength_sel;
3691 brcmf_sdiod_regwl(sdiodev, addr, cc_data_temp, NULL);
3692
3693 brcmf_dbg(INFO, "SDIO: %d mA (req=%d mA) drive strength selected, set to 0x%08x\n",
3694 str_tab[i].strength, drivestrength, cc_data_temp);
3695 }
3696 }
3697
3698 static int brcmf_sdio_buscoreprep(void *ctx)
3699 {
3700 struct brcmf_sdio_dev *sdiodev = ctx;
3701 int err = 0;
3702 u8 clkval, clkset;
3703
3704 /* Try forcing SDIO core to do ALPAvail request only */
3705 clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_ALP_AVAIL_REQ;
3706 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
3707 if (err) {
3708 brcmf_err("error writing for HT off\n");
3709 return err;
3710 }
3711
3712 /* If register supported, wait for ALPAvail and then force ALP */
3713 /* This may take up to 15 milliseconds */
3714 clkval = brcmf_sdiod_regrb(sdiodev,
3715 SBSDIO_FUNC1_CHIPCLKCSR, NULL);
3716
3717 if ((clkval & ~SBSDIO_AVBITS) != clkset) {
3718 brcmf_err("ChipClkCSR access: wrote 0x%02x read 0x%02x\n",
3719 clkset, clkval);
3720 return -EACCES;
3721 }
3722
3723 SPINWAIT(((clkval = brcmf_sdiod_regrb(sdiodev,
3724 SBSDIO_FUNC1_CHIPCLKCSR, NULL)),
3725 !SBSDIO_ALPAV(clkval)),
3726 PMU_MAX_TRANSITION_DLY);
3727 if (!SBSDIO_ALPAV(clkval)) {
3728 brcmf_err("timeout on ALPAV wait, clkval 0x%02x\n",
3729 clkval);
3730 return -EBUSY;
3731 }
3732
3733 clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_FORCE_ALP;
3734 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
3735 udelay(65);
3736
3737 /* Also, disable the extra SDIO pull-ups */
3738 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SDIOPULLUP, 0, NULL);
3739
3740 return 0;
3741 }
3742
3743 static void brcmf_sdio_buscore_activate(void *ctx, struct brcmf_chip *chip,
3744 u32 rstvec)
3745 {
3746 struct brcmf_sdio_dev *sdiodev = ctx;
3747 struct brcmf_core *core;
3748 u32 reg_addr;
3749
3750 /* clear all interrupts */
3751 core = brcmf_chip_get_core(chip, BCMA_CORE_SDIO_DEV);
3752 reg_addr = core->base + offsetof(struct sdpcmd_regs, intstatus);
3753 brcmf_sdiod_regwl(sdiodev, reg_addr, 0xFFFFFFFF, NULL);
3754
3755 if (rstvec)
3756 /* Write reset vector to address 0 */
3757 brcmf_sdiod_ramrw(sdiodev, true, 0, (void *)&rstvec,
3758 sizeof(rstvec));
3759 }
3760
3761 static u32 brcmf_sdio_buscore_read32(void *ctx, u32 addr)
3762 {
3763 struct brcmf_sdio_dev *sdiodev = ctx;
3764 u32 val, rev;
3765
3766 val = brcmf_sdiod_regrl(sdiodev, addr, NULL);
3767 if ((sdiodev->func[0]->device == SDIO_DEVICE_ID_BROADCOM_4335_4339 ||
3768 sdiodev->func[0]->device == SDIO_DEVICE_ID_BROADCOM_4339) &&
3769 addr == CORE_CC_REG(SI_ENUM_BASE, chipid)) {
3770 rev = (val & CID_REV_MASK) >> CID_REV_SHIFT;
3771 if (rev >= 2) {
3772 val &= ~CID_ID_MASK;
3773 val |= BRCM_CC_4339_CHIP_ID;
3774 }
3775 }
3776 return val;
3777 }
3778
3779 static void brcmf_sdio_buscore_write32(void *ctx, u32 addr, u32 val)
3780 {
3781 struct brcmf_sdio_dev *sdiodev = ctx;
3782
3783 brcmf_sdiod_regwl(sdiodev, addr, val, NULL);
3784 }
3785
3786 static const struct brcmf_buscore_ops brcmf_sdio_buscore_ops = {
3787 .prepare = brcmf_sdio_buscoreprep,
3788 .activate = brcmf_sdio_buscore_activate,
3789 .read32 = brcmf_sdio_buscore_read32,
3790 .write32 = brcmf_sdio_buscore_write32,
3791 };
3792
3793 static bool
3794 brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
3795 {
3796 struct brcmf_sdio_dev *sdiodev;
3797 u8 clkctl = 0;
3798 int err = 0;
3799 int reg_addr;
3800 u32 reg_val;
3801 u32 drivestrength;
3802
3803 sdiodev = bus->sdiodev;
3804 sdio_claim_host(sdiodev->func[1]);
3805
3806 pr_debug("F1 signature read @0x18000000=0x%4x\n",
3807 brcmf_sdiod_regrl(sdiodev, SI_ENUM_BASE, NULL));
3808
3809 /*
3810 * Force PLL off until brcmf_chip_attach()
3811 * programs PLL control regs
3812 */
3813
3814 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3815 BRCMF_INIT_CLKCTL1, &err);
3816 if (!err)
3817 clkctl = brcmf_sdiod_regrb(sdiodev,
3818 SBSDIO_FUNC1_CHIPCLKCSR, &err);
3819
3820 if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3821 brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3822 err, BRCMF_INIT_CLKCTL1, clkctl);
3823 goto fail;
3824 }
3825
3826 bus->ci = brcmf_chip_attach(sdiodev, &brcmf_sdio_buscore_ops);
3827 if (IS_ERR(bus->ci)) {
3828 brcmf_err("brcmf_chip_attach failed!\n");
3829 bus->ci = NULL;
3830 goto fail;
3831 }
3832 sdiodev->settings = brcmf_get_module_param(sdiodev->dev,
3833 BRCMF_BUSTYPE_SDIO,
3834 bus->ci->chip,
3835 bus->ci->chiprev);
3836 if (!sdiodev->settings) {
3837 brcmf_err("Failed to get device parameters\n");
3838 goto fail;
3839 }
3840 /* platform specific configuration:
3841 * alignments must be at least 4 bytes for ADMA
3842 */
3843 bus->head_align = ALIGNMENT;
3844 bus->sgentry_align = ALIGNMENT;
3845 if (sdiodev->settings->bus.sdio.sd_head_align > ALIGNMENT)
3846 bus->head_align = sdiodev->settings->bus.sdio.sd_head_align;
3847 if (sdiodev->settings->bus.sdio.sd_sgentry_align > ALIGNMENT)
3848 bus->sgentry_align =
3849 sdiodev->settings->bus.sdio.sd_sgentry_align;
3850
3851 /* allocate scatter-gather table. sg support
3852 * will be disabled upon allocation failure.
3853 */
3854 brcmf_sdiod_sgtable_alloc(sdiodev);
3855
3856 #ifdef CONFIG_PM_SLEEP
3857 /* wowl can be supported when KEEP_POWER is true and (WAKE_SDIO_IRQ
3858 * is true or when platform data OOB irq is true).
3859 */
3860 if ((sdio_get_host_pm_caps(sdiodev->func[1]) & MMC_PM_KEEP_POWER) &&
3861 ((sdio_get_host_pm_caps(sdiodev->func[1]) & MMC_PM_WAKE_SDIO_IRQ) ||
3862 (sdiodev->settings->bus.sdio.oob_irq_supported)))
3863 sdiodev->bus_if->wowl_supported = true;
3864 #endif
3865
3866 if (brcmf_sdio_kso_init(bus)) {
3867 brcmf_err("error enabling KSO\n");
3868 goto fail;
3869 }
3870
3871 if (sdiodev->settings->bus.sdio.drive_strength)
3872 drivestrength = sdiodev->settings->bus.sdio.drive_strength;
3873 else
3874 drivestrength = DEFAULT_SDIO_DRIVE_STRENGTH;
3875 brcmf_sdio_drivestrengthinit(sdiodev, bus->ci, drivestrength);
3876
3877 /* Set card control so an SDIO card reset does a WLAN backplane reset */
3878 reg_val = brcmf_sdiod_regrb(sdiodev, SDIO_CCCR_BRCM_CARDCTRL, &err);
3879 if (err)
3880 goto fail;
3881
3882 reg_val |= SDIO_CCCR_BRCM_CARDCTRL_WLANRESET;
3883
3884 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err);
3885 if (err)
3886 goto fail;
3887
3888 /* set PMUControl so a backplane reset does PMU state reload */
3889 reg_addr = CORE_CC_REG(brcmf_chip_get_pmu(bus->ci)->base, pmucontrol);
3890 reg_val = brcmf_sdiod_regrl(sdiodev, reg_addr, &err);
3891 if (err)
3892 goto fail;
3893
3894 reg_val |= (BCMA_CC_PMU_CTL_RES_RELOAD << BCMA_CC_PMU_CTL_RES_SHIFT);
3895
3896 brcmf_sdiod_regwl(sdiodev, reg_addr, reg_val, &err);
3897 if (err)
3898 goto fail;
3899
3900 sdio_release_host(sdiodev->func[1]);
3901
3902 brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3903
3904 /* allocate header buffer */
3905 bus->hdrbuf = kzalloc(MAX_HDR_READ + bus->head_align, GFP_KERNEL);
3906 if (!bus->hdrbuf)
3907 return false;
3908 /* Locate an appropriately-aligned portion of hdrbuf */
3909 bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3910 bus->head_align);
3911
3912 /* Set the poll and/or interrupt flags */
3913 bus->intr = true;
3914 bus->poll = false;
3915 if (bus->poll)
3916 bus->pollrate = 1;
3917
3918 return true;
3919
3920 fail:
3921 sdio_release_host(sdiodev->func[1]);
3922 return false;
3923 }
3924
3925 static int
3926 brcmf_sdio_watchdog_thread(void *data)
3927 {
3928 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3929 int wait;
3930
3931 allow_signal(SIGTERM);
3932 /* Run until signal received */
3933 brcmf_sdiod_freezer_count(bus->sdiodev);
3934 while (1) {
3935 if (kthread_should_stop())
3936 break;
3937 brcmf_sdiod_freezer_uncount(bus->sdiodev);
3938 wait = wait_for_completion_interruptible(&bus->watchdog_wait);
3939 brcmf_sdiod_freezer_count(bus->sdiodev);
3940 brcmf_sdiod_try_freeze(bus->sdiodev);
3941 if (!wait) {
3942 brcmf_sdio_bus_watchdog(bus);
3943 /* Count the tick for reference */
3944 bus->sdcnt.tickcnt++;
3945 reinit_completion(&bus->watchdog_wait);
3946 } else
3947 break;
3948 }
3949 return 0;
3950 }
3951
3952 static void
3953 brcmf_sdio_watchdog(unsigned long data)
3954 {
3955 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3956
3957 if (bus->watchdog_tsk) {
3958 complete(&bus->watchdog_wait);
3959 /* Reschedule the watchdog */
3960 if (bus->wd_active)
3961 mod_timer(&bus->timer,
3962 jiffies + BRCMF_WD_POLL);
3963 }
3964 }
3965
3966 static const struct brcmf_bus_ops brcmf_sdio_bus_ops = {
3967 .stop = brcmf_sdio_bus_stop,
3968 .preinit = brcmf_sdio_bus_preinit,
3969 .txdata = brcmf_sdio_bus_txdata,
3970 .txctl = brcmf_sdio_bus_txctl,
3971 .rxctl = brcmf_sdio_bus_rxctl,
3972 .gettxq = brcmf_sdio_bus_gettxq,
3973 .wowl_config = brcmf_sdio_wowl_config,
3974 .get_ramsize = brcmf_sdio_bus_get_ramsize,
3975 .get_memdump = brcmf_sdio_bus_get_memdump,
3976 };
3977
3978 static void brcmf_sdio_firmware_callback(struct device *dev,
3979 const struct firmware *code,
3980 void *nvram, u32 nvram_len)
3981 {
3982 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3983 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3984 struct brcmf_sdio *bus = sdiodev->bus;
3985 int err = 0;
3986 u8 saveclk;
3987
3988 brcmf_dbg(TRACE, "Enter: dev=%s\n", dev_name(dev));
3989
3990 if (!bus_if->drvr)
3991 return;
3992
3993 /* try to download image and nvram to the dongle */
3994 bus->alp_only = true;
3995 err = brcmf_sdio_download_firmware(bus, code, nvram, nvram_len);
3996 if (err)
3997 goto fail;
3998 bus->alp_only = false;
3999
4000 /* Start the watchdog timer */
4001 bus->sdcnt.tickcnt = 0;
4002 brcmf_sdio_wd_timer(bus, true);
4003
4004 sdio_claim_host(sdiodev->func[1]);
4005
4006 /* Make sure backplane clock is on, needed to generate F2 interrupt */
4007 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
4008 if (bus->clkstate != CLK_AVAIL)
4009 goto release;
4010
4011 /* Force clocks on backplane to be sure F2 interrupt propagates */
4012 saveclk = brcmf_sdiod_regrb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, &err);
4013 if (!err) {
4014 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
4015 (saveclk | SBSDIO_FORCE_HT), &err);
4016 }
4017 if (err) {
4018 brcmf_err("Failed to force clock for F2: err %d\n", err);
4019 goto release;
4020 }
4021
4022 /* Enable function 2 (frame transfers) */
4023 w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
4024 offsetof(struct sdpcmd_regs, tosbmailboxdata));
4025 err = sdio_enable_func(sdiodev->func[SDIO_FUNC_2]);
4026
4027
4028 brcmf_dbg(INFO, "enable F2: err=%d\n", err);
4029
4030 /* If F2 successfully enabled, set core and enable interrupts */
4031 if (!err) {
4032 /* Set up the interrupt mask and enable interrupts */
4033 bus->hostintmask = HOSTINTMASK;
4034 w_sdreg32(bus, bus->hostintmask,
4035 offsetof(struct sdpcmd_regs, hostintmask));
4036
4037 brcmf_sdiod_regwb(sdiodev, SBSDIO_WATERMARK, 8, &err);
4038 } else {
4039 /* Disable F2 again */
4040 sdio_disable_func(sdiodev->func[SDIO_FUNC_2]);
4041 goto release;
4042 }
4043
4044 if (brcmf_chip_sr_capable(bus->ci)) {
4045 brcmf_sdio_sr_init(bus);
4046 } else {
4047 /* Restore previous clock setting */
4048 brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
4049 saveclk, &err);
4050 }
4051
4052 if (err == 0) {
4053 /* Allow full data communication using DPC from now on. */
4054 brcmf_sdiod_change_state(bus->sdiodev, BRCMF_SDIOD_DATA);
4055
4056 err = brcmf_sdiod_intr_register(sdiodev);
4057 if (err != 0)
4058 brcmf_err("intr register failed:%d\n", err);
4059 }
4060
4061 /* If we didn't come up, turn off backplane clock */
4062 if (err != 0)
4063 brcmf_sdio_clkctl(bus, CLK_NONE, false);
4064
4065 sdio_release_host(sdiodev->func[1]);
4066
4067 err = brcmf_bus_start(dev);
4068 if (err != 0) {
4069 brcmf_err("dongle is not responding\n");
4070 goto fail;
4071 }
4072 return;
4073
4074 release:
4075 sdio_release_host(sdiodev->func[1]);
4076 fail:
4077 brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), err);
4078 device_release_driver(dev);
4079 }
4080
4081 struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
4082 {
4083 int ret;
4084 struct brcmf_sdio *bus;
4085 struct workqueue_struct *wq;
4086
4087 brcmf_dbg(TRACE, "Enter\n");
4088
4089 /* Allocate private bus interface state */
4090 bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
4091 if (!bus)
4092 goto fail;
4093
4094 bus->sdiodev = sdiodev;
4095 sdiodev->bus = bus;
4096 skb_queue_head_init(&bus->glom);
4097 bus->txbound = BRCMF_TXBOUND;
4098 bus->rxbound = BRCMF_RXBOUND;
4099 bus->txminmax = BRCMF_TXMINMAX;
4100 bus->tx_seq = SDPCM_SEQ_WRAP - 1;
4101
4102 /* single-threaded workqueue */
4103 wq = alloc_ordered_workqueue("brcmf_wq/%s", WQ_MEM_RECLAIM,
4104 dev_name(&sdiodev->func[1]->dev));
4105 if (!wq) {
4106 brcmf_err("insufficient memory to create txworkqueue\n");
4107 goto fail;
4108 }
4109 brcmf_sdiod_freezer_count(sdiodev);
4110 INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
4111 bus->brcmf_wq = wq;
4112
4113 /* attempt to attach to the dongle */
4114 if (!(brcmf_sdio_probe_attach(bus))) {
4115 brcmf_err("brcmf_sdio_probe_attach failed\n");
4116 goto fail;
4117 }
4118
4119 spin_lock_init(&bus->rxctl_lock);
4120 spin_lock_init(&bus->txq_lock);
4121 init_waitqueue_head(&bus->ctrl_wait);
4122 init_waitqueue_head(&bus->dcmd_resp_wait);
4123
4124 /* Set up the watchdog timer */
4125 init_timer(&bus->timer);
4126 bus->timer.data = (unsigned long)bus;
4127 bus->timer.function = brcmf_sdio_watchdog;
4128
4129 /* Initialize watchdog thread */
4130 init_completion(&bus->watchdog_wait);
4131 bus->watchdog_tsk = kthread_run(brcmf_sdio_watchdog_thread,
4132 bus, "brcmf_wdog/%s",
4133 dev_name(&sdiodev->func[1]->dev));
4134 if (IS_ERR(bus->watchdog_tsk)) {
4135 pr_warn("brcmf_watchdog thread failed to start\n");
4136 bus->watchdog_tsk = NULL;
4137 }
4138 /* Initialize DPC thread */
4139 bus->dpc_triggered = false;
4140 bus->dpc_running = false;
4141
4142 /* Assign bus interface call back */
4143 bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
4144 bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops;
4145 bus->sdiodev->bus_if->chip = bus->ci->chip;
4146 bus->sdiodev->bus_if->chiprev = bus->ci->chiprev;
4147
4148 /* default sdio bus header length for tx packet */
4149 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
4150
4151 /* Attach to the common layer, reserve hdr space */
4152 ret = brcmf_attach(bus->sdiodev->dev, bus->sdiodev->settings);
4153 if (ret != 0) {
4154 brcmf_err("brcmf_attach failed\n");
4155 goto fail;
4156 }
4157
4158 /* allocate scatter-gather table. sg support
4159 * will be disabled upon allocation failure.
4160 */
4161 brcmf_sdiod_sgtable_alloc(bus->sdiodev);
4162
4163 /* Query the F2 block size, set roundup accordingly */
4164 bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
4165 bus->roundup = min(max_roundup, bus->blocksize);
4166
4167 /* Allocate buffers */
4168 if (bus->sdiodev->bus_if->maxctl) {
4169 bus->sdiodev->bus_if->maxctl += bus->roundup;
4170 bus->rxblen =
4171 roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
4172 ALIGNMENT) + bus->head_align;
4173 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
4174 if (!(bus->rxbuf)) {
4175 brcmf_err("rxbuf allocation failed\n");
4176 goto fail;
4177 }
4178 }
4179
4180 sdio_claim_host(bus->sdiodev->func[1]);
4181
4182 /* Disable F2 to clear any intermediate frame state on the dongle */
4183 sdio_disable_func(bus->sdiodev->func[SDIO_FUNC_2]);
4184
4185 bus->rxflow = false;
4186
4187 /* Done with backplane-dependent accesses, can drop clock... */
4188 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
4189
4190 sdio_release_host(bus->sdiodev->func[1]);
4191
4192 /* ...and initialize clock/power states */
4193 bus->clkstate = CLK_SDONLY;
4194 bus->idletime = BRCMF_IDLE_INTERVAL;
4195 bus->idleclock = BRCMF_IDLE_ACTIVE;
4196
4197 /* SR state */
4198 bus->sr_enabled = false;
4199
4200 brcmf_sdio_debugfs_create(bus);
4201 brcmf_dbg(INFO, "completed!!\n");
4202
4203 ret = brcmf_fw_map_chip_to_name(bus->ci->chip, bus->ci->chiprev,
4204 brcmf_sdio_fwnames,
4205 ARRAY_SIZE(brcmf_sdio_fwnames),
4206 sdiodev->fw_name, sdiodev->nvram_name);
4207 if (ret)
4208 goto fail;
4209
4210 ret = brcmf_fw_get_firmwares(sdiodev->dev, BRCMF_FW_REQUEST_NVRAM,
4211 sdiodev->fw_name, sdiodev->nvram_name,
4212 brcmf_sdio_firmware_callback);
4213 if (ret != 0) {
4214 brcmf_err("async firmware request failed: %d\n", ret);
4215 goto fail;
4216 }
4217
4218 return bus;
4219
4220 fail:
4221 brcmf_sdio_remove(bus);
4222 return NULL;
4223 }
4224
4225 /* Detach and free everything */
4226 void brcmf_sdio_remove(struct brcmf_sdio *bus)
4227 {
4228 brcmf_dbg(TRACE, "Enter\n");
4229
4230 if (bus) {
4231 /* De-register interrupt handler */
4232 brcmf_sdiod_intr_unregister(bus->sdiodev);
4233
4234 brcmf_detach(bus->sdiodev->dev);
4235
4236 cancel_work_sync(&bus->datawork);
4237 if (bus->brcmf_wq)
4238 destroy_workqueue(bus->brcmf_wq);
4239
4240 if (bus->ci) {
4241 if (bus->sdiodev->state != BRCMF_SDIOD_NOMEDIUM) {
4242 sdio_claim_host(bus->sdiodev->func[1]);
4243 brcmf_sdio_wd_timer(bus, false);
4244 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
4245 /* Leave the device in state where it is
4246 * 'passive'. This is done by resetting all
4247 * necessary cores.
4248 */
4249 msleep(20);
4250 brcmf_chip_set_passive(bus->ci);
4251 brcmf_sdio_clkctl(bus, CLK_NONE, false);
4252 sdio_release_host(bus->sdiodev->func[1]);
4253 }
4254 brcmf_chip_detach(bus->ci);
4255 }
4256 if (bus->sdiodev->settings)
4257 brcmf_release_module_param(bus->sdiodev->settings);
4258
4259 kfree(bus->rxbuf);
4260 kfree(bus->hdrbuf);
4261 kfree(bus);
4262 }
4263
4264 brcmf_dbg(TRACE, "Disconnected\n");
4265 }
4266
4267 void brcmf_sdio_wd_timer(struct brcmf_sdio *bus, bool active)
4268 {
4269 /* Totally stop the timer */
4270 if (!active && bus->wd_active) {
4271 del_timer_sync(&bus->timer);
4272 bus->wd_active = false;
4273 return;
4274 }
4275
4276 /* don't start the wd until fw is loaded */
4277 if (bus->sdiodev->state != BRCMF_SDIOD_DATA)
4278 return;
4279
4280 if (active) {
4281 if (!bus->wd_active) {
4282 /* Create timer again when watchdog period is
4283 dynamically changed or in the first instance
4284 */
4285 bus->timer.expires = jiffies + BRCMF_WD_POLL;
4286 add_timer(&bus->timer);
4287 bus->wd_active = true;
4288 } else {
4289 /* Re arm the timer, at last watchdog period */
4290 mod_timer(&bus->timer, jiffies + BRCMF_WD_POLL);
4291 }
4292 }
4293 }
4294
4295 int brcmf_sdio_sleep(struct brcmf_sdio *bus, bool sleep)
4296 {
4297 int ret;
4298
4299 sdio_claim_host(bus->sdiodev->func[1]);
4300 ret = brcmf_sdio_bus_sleep(bus, sleep, false);
4301 sdio_release_host(bus->sdiodev->func[1]);
4302
4303 return ret;
4304 }
4305
Linux kernel - Deliverables
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