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brcmfmac: add comment block in brcmf_sdio_buscore_read()
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / broadcom / brcm80211 / brcmfmac / sdio.c
blob08686147b59d5ed4e14c76e71eb077aa70712733
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/signal.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 #include "bcdc.h"
48
49 #define DCMD_RESP_TIMEOUT msecs_to_jiffies(2500)
50 #define CTL_DONE_TIMEOUT msecs_to_jiffies(2500)
51
52 #ifdef DEBUG
53
54 #define BRCMF_TRAP_INFO_SIZE 80
55
56 #define CBUF_LEN (128)
57
58 /* Device console log buffer state */
59 #define CONSOLE_BUFFER_MAX 2024
60
61 struct rte_log_le {
62 __le32 buf; /* Can't be pointer on (64-bit) hosts */
63 __le32 buf_size;
64 __le32 idx;
65 char *_buf_compat; /* Redundant pointer for backward compat. */
66 };
67
68 struct rte_console {
69 /* Virtual UART
70 * When there is no UART (e.g. Quickturn),
71 * the host should write a complete
72 * input line directly into cbuf and then write
73 * the length into vcons_in.
74 * This may also be used when there is a real UART
75 * (at risk of conflicting with
76 * the real UART). vcons_out is currently unused.
77 */
78 uint vcons_in;
79 uint vcons_out;
80
81 /* Output (logging) buffer
82 * Console output is written to a ring buffer log_buf at index log_idx.
83 * The host may read the output when it sees log_idx advance.
84 * Output will be lost if the output wraps around faster than the host
85 * polls.
86 */
87 struct rte_log_le log_le;
88
89 /* Console input line buffer
90 * Characters are read one at a time into cbuf
91 * until <CR> is received, then
92 * the buffer is processed as a command line.
93 * Also used for virtual UART.
94 */
95 uint cbuf_idx;
96 char cbuf[CBUF_LEN];
97 };
98
99 #endif /* DEBUG */
100 #include <chipcommon.h>
101
102 #include "bus.h"
103 #include "debug.h"
104 #include "tracepoint.h"
105
106 #define TXQLEN 2048 /* bulk tx queue length */
107 #define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */
108 #define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */
109 #define PRIOMASK 7
110
111 #define TXRETRIES 2 /* # of retries for tx frames */
112
113 #define BRCMF_RXBOUND 50 /* Default for max rx frames in
114 one scheduling */
115
116 #define BRCMF_TXBOUND 20 /* Default for max tx frames in
117 one scheduling */
118
119 #define BRCMF_TXMINMAX 1 /* Max tx frames if rx still pending */
120
121 #define MEMBLOCK 2048 /* Block size used for downloading
122 of dongle image */
123 #define MAX_DATA_BUF (32 * 1024) /* Must be large enough to hold
124 biggest possible glom */
125
126 #define BRCMF_FIRSTREAD (1 << 6)
127
128 #define BRCMF_CONSOLE 10 /* watchdog interval to poll console */
129
130 /* SBSDIO_DEVICE_CTL */
131
132 /* 1: device will assert busy signal when receiving CMD53 */
133 #define SBSDIO_DEVCTL_SETBUSY 0x01
134 /* 1: assertion of sdio interrupt is synchronous to the sdio clock */
135 #define SBSDIO_DEVCTL_SPI_INTR_SYNC 0x02
136 /* 1: mask all interrupts to host except the chipActive (rev 8) */
137 #define SBSDIO_DEVCTL_CA_INT_ONLY 0x04
138 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
139 * sdio bus power cycle to clear (rev 9) */
140 #define SBSDIO_DEVCTL_PADS_ISO 0x08
141 /* Force SD->SB reset mapping (rev 11) */
142 #define SBSDIO_DEVCTL_SB_RST_CTL 0x30
143 /* Determined by CoreControl bit */
144 #define SBSDIO_DEVCTL_RST_CORECTL 0x00
145 /* Force backplane reset */
146 #define SBSDIO_DEVCTL_RST_BPRESET 0x10
147 /* Force no backplane reset */
148 #define SBSDIO_DEVCTL_RST_NOBPRESET 0x20
149
150 /* direct(mapped) cis space */
151
152 /* MAPPED common CIS address */
153 #define SBSDIO_CIS_BASE_COMMON 0x1000
154 /* maximum bytes in one CIS */
155 #define SBSDIO_CIS_SIZE_LIMIT 0x200
156 /* cis offset addr is < 17 bits */
157 #define SBSDIO_CIS_OFT_ADDR_MASK 0x1FFFF
158
159 /* manfid tuple length, include tuple, link bytes */
160 #define SBSDIO_CIS_MANFID_TUPLE_LEN 6
161
162 #define SD_REG(field) \
163 (offsetof(struct sdpcmd_regs, field))
164
165 /* SDIO function 1 register CHIPCLKCSR */
166 /* Force ALP request to backplane */
167 #define SBSDIO_FORCE_ALP 0x01
168 /* Force HT request to backplane */
169 #define SBSDIO_FORCE_HT 0x02
170 /* Force ILP request to backplane */
171 #define SBSDIO_FORCE_ILP 0x04
172 /* Make ALP ready (power up xtal) */
173 #define SBSDIO_ALP_AVAIL_REQ 0x08
174 /* Make HT ready (power up PLL) */
175 #define SBSDIO_HT_AVAIL_REQ 0x10
176 /* Squelch clock requests from HW */
177 #define SBSDIO_FORCE_HW_CLKREQ_OFF 0x20
178 /* Status: ALP is ready */
179 #define SBSDIO_ALP_AVAIL 0x40
180 /* Status: HT is ready */
181 #define SBSDIO_HT_AVAIL 0x80
182 #define SBSDIO_CSR_MASK 0x1F
183 #define SBSDIO_AVBITS (SBSDIO_HT_AVAIL | SBSDIO_ALP_AVAIL)
184 #define SBSDIO_ALPAV(regval) ((regval) & SBSDIO_AVBITS)
185 #define SBSDIO_HTAV(regval) (((regval) & SBSDIO_AVBITS) == SBSDIO_AVBITS)
186 #define SBSDIO_ALPONLY(regval) (SBSDIO_ALPAV(regval) && !SBSDIO_HTAV(regval))
187 #define SBSDIO_CLKAV(regval, alponly) \
188 (SBSDIO_ALPAV(regval) && (alponly ? 1 : SBSDIO_HTAV(regval)))
189
190 /* intstatus */
191 #define I_SMB_SW0 (1 << 0) /* To SB Mail S/W interrupt 0 */
192 #define I_SMB_SW1 (1 << 1) /* To SB Mail S/W interrupt 1 */
193 #define I_SMB_SW2 (1 << 2) /* To SB Mail S/W interrupt 2 */
194 #define I_SMB_SW3 (1 << 3) /* To SB Mail S/W interrupt 3 */
195 #define I_SMB_SW_MASK 0x0000000f /* To SB Mail S/W interrupts mask */
196 #define I_SMB_SW_SHIFT 0 /* To SB Mail S/W interrupts shift */
197 #define I_HMB_SW0 (1 << 4) /* To Host Mail S/W interrupt 0 */
198 #define I_HMB_SW1 (1 << 5) /* To Host Mail S/W interrupt 1 */
199 #define I_HMB_SW2 (1 << 6) /* To Host Mail S/W interrupt 2 */
200 #define I_HMB_SW3 (1 << 7) /* To Host Mail S/W interrupt 3 */
201 #define I_HMB_SW_MASK 0x000000f0 /* To Host Mail S/W interrupts mask */
202 #define I_HMB_SW_SHIFT 4 /* To Host Mail S/W interrupts shift */
203 #define I_WR_OOSYNC (1 << 8) /* Write Frame Out Of Sync */
204 #define I_RD_OOSYNC (1 << 9) /* Read Frame Out Of Sync */
205 #define I_PC (1 << 10) /* descriptor error */
206 #define I_PD (1 << 11) /* data error */
207 #define I_DE (1 << 12) /* Descriptor protocol Error */
208 #define I_RU (1 << 13) /* Receive descriptor Underflow */
209 #define I_RO (1 << 14) /* Receive fifo Overflow */
210 #define I_XU (1 << 15) /* Transmit fifo Underflow */
211 #define I_RI (1 << 16) /* Receive Interrupt */
212 #define I_BUSPWR (1 << 17) /* SDIO Bus Power Change (rev 9) */
213 #define I_XMTDATA_AVAIL (1 << 23) /* bits in fifo */
214 #define I_XI (1 << 24) /* Transmit Interrupt */
215 #define I_RF_TERM (1 << 25) /* Read Frame Terminate */
216 #define I_WF_TERM (1 << 26) /* Write Frame Terminate */
217 #define I_PCMCIA_XU (1 << 27) /* PCMCIA Transmit FIFO Underflow */
218 #define I_SBINT (1 << 28) /* sbintstatus Interrupt */
219 #define I_CHIPACTIVE (1 << 29) /* chip from doze to active state */
220 #define I_SRESET (1 << 30) /* CCCR RES interrupt */
221 #define I_IOE2 (1U << 31) /* CCCR IOE2 Bit Changed */
222 #define I_ERRORS (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
223 #define I_DMA (I_RI | I_XI | I_ERRORS)
224
225 /* corecontrol */
226 #define CC_CISRDY (1 << 0) /* CIS Ready */
227 #define CC_BPRESEN (1 << 1) /* CCCR RES signal */
228 #define CC_F2RDY (1 << 2) /* set CCCR IOR2 bit */
229 #define CC_CLRPADSISO (1 << 3) /* clear SDIO pads isolation */
230 #define CC_XMTDATAAVAIL_MODE (1 << 4)
231 #define CC_XMTDATAAVAIL_CTRL (1 << 5)
232
233 /* SDA_FRAMECTRL */
234 #define SFC_RF_TERM (1 << 0) /* Read Frame Terminate */
235 #define SFC_WF_TERM (1 << 1) /* Write Frame Terminate */
236 #define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */
237 #define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */
238
239 /*
240 * Software allocation of To SB Mailbox resources
241 */
242
243 /* tosbmailbox bits corresponding to intstatus bits */
244 #define SMB_NAK (1 << 0) /* Frame NAK */
245 #define SMB_INT_ACK (1 << 1) /* Host Interrupt ACK */
246 #define SMB_USE_OOB (1 << 2) /* Use OOB Wakeup */
247 #define SMB_DEV_INT (1 << 3) /* Miscellaneous Interrupt */
248
249 /* tosbmailboxdata */
250 #define SMB_DATA_VERSION_SHIFT 16 /* host protocol version */
251
252 /*
253 * Software allocation of To Host Mailbox resources
254 */
255
256 /* intstatus bits */
257 #define I_HMB_FC_STATE I_HMB_SW0 /* Flow Control State */
258 #define I_HMB_FC_CHANGE I_HMB_SW1 /* Flow Control State Changed */
259 #define I_HMB_FRAME_IND I_HMB_SW2 /* Frame Indication */
260 #define I_HMB_HOST_INT I_HMB_SW3 /* Miscellaneous Interrupt */
261
262 /* tohostmailboxdata */
263 #define HMB_DATA_NAKHANDLED 0x0001 /* retransmit NAK'd frame */
264 #define HMB_DATA_DEVREADY 0x0002 /* talk to host after enable */
265 #define HMB_DATA_FC 0x0004 /* per prio flowcontrol update flag */
266 #define HMB_DATA_FWREADY 0x0008 /* fw ready for protocol activity */
267 #define HMB_DATA_FWHALT 0x0010 /* firmware halted */
268
269 #define HMB_DATA_FCDATA_MASK 0xff000000
270 #define HMB_DATA_FCDATA_SHIFT 24
271
272 #define HMB_DATA_VERSION_MASK 0x00ff0000
273 #define HMB_DATA_VERSION_SHIFT 16
274
275 /*
276 * Software-defined protocol header
277 */
278
279 /* Current protocol version */
280 #define SDPCM_PROT_VERSION 4
281
282 /*
283 * Shared structure between dongle and the host.
284 * The structure contains pointers to trap or assert information.
285 */
286 #define SDPCM_SHARED_VERSION 0x0003
287 #define SDPCM_SHARED_VERSION_MASK 0x00FF
288 #define SDPCM_SHARED_ASSERT_BUILT 0x0100
289 #define SDPCM_SHARED_ASSERT 0x0200
290 #define SDPCM_SHARED_TRAP 0x0400
291
292 /* Space for header read, limit for data packets */
293 #define MAX_HDR_READ (1 << 6)
294 #define MAX_RX_DATASZ 2048
295
296 /* Bump up limit on waiting for HT to account for first startup;
297 * if the image is doing a CRC calculation before programming the PMU
298 * for HT availability, it could take a couple hundred ms more, so
299 * max out at a 1 second (1000000us).
300 */
301 #undef PMU_MAX_TRANSITION_DLY
302 #define PMU_MAX_TRANSITION_DLY 1000000
303
304 /* Value for ChipClockCSR during initial setup */
305 #define BRCMF_INIT_CLKCTL1 (SBSDIO_FORCE_HW_CLKREQ_OFF | \
306 SBSDIO_ALP_AVAIL_REQ)
307
308 /* Flags for SDH calls */
309 #define F2SYNC (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
310
311 #define BRCMF_IDLE_ACTIVE 0 /* Do not request any SD clock change
312 * when idle
313 */
314 #define BRCMF_IDLE_INTERVAL 1
315
316 #define KSO_WAIT_US 50
317 #define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US)
318 #define BRCMF_SDIO_MAX_ACCESS_ERRORS 5
319
320 /*
321 * Conversion of 802.1D priority to precedence level
322 */
323 static uint prio2prec(u32 prio)
324 {
325 return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
326 (prio^2) : prio;
327 }
328
329 #ifdef DEBUG
330 /* Device console log buffer state */
331 struct brcmf_console {
332 uint count; /* Poll interval msec counter */
333 uint log_addr; /* Log struct address (fixed) */
334 struct rte_log_le log_le; /* Log struct (host copy) */
335 uint bufsize; /* Size of log buffer */
336 u8 *buf; /* Log buffer (host copy) */
337 uint last; /* Last buffer read index */
338 };
339
340 struct brcmf_trap_info {
341 __le32 type;
342 __le32 epc;
343 __le32 cpsr;
344 __le32 spsr;
345 __le32 r0; /* a1 */
346 __le32 r1; /* a2 */
347 __le32 r2; /* a3 */
348 __le32 r3; /* a4 */
349 __le32 r4; /* v1 */
350 __le32 r5; /* v2 */
351 __le32 r6; /* v3 */
352 __le32 r7; /* v4 */
353 __le32 r8; /* v5 */
354 __le32 r9; /* sb/v6 */
355 __le32 r10; /* sl/v7 */
356 __le32 r11; /* fp/v8 */
357 __le32 r12; /* ip */
358 __le32 r13; /* sp */
359 __le32 r14; /* lr */
360 __le32 pc; /* r15 */
361 };
362 #endif /* DEBUG */
363
364 struct sdpcm_shared {
365 u32 flags;
366 u32 trap_addr;
367 u32 assert_exp_addr;
368 u32 assert_file_addr;
369 u32 assert_line;
370 u32 console_addr; /* Address of struct rte_console */
371 u32 msgtrace_addr;
372 u8 tag[32];
373 u32 brpt_addr;
374 };
375
376 struct sdpcm_shared_le {
377 __le32 flags;
378 __le32 trap_addr;
379 __le32 assert_exp_addr;
380 __le32 assert_file_addr;
381 __le32 assert_line;
382 __le32 console_addr; /* Address of struct rte_console */
383 __le32 msgtrace_addr;
384 u8 tag[32];
385 __le32 brpt_addr;
386 };
387
388 /* dongle SDIO bus specific header info */
389 struct brcmf_sdio_hdrinfo {
390 u8 seq_num;
391 u8 channel;
392 u16 len;
393 u16 len_left;
394 u16 len_nxtfrm;
395 u8 dat_offset;
396 bool lastfrm;
397 u16 tail_pad;
398 };
399
400 /*
401 * hold counter variables
402 */
403 struct brcmf_sdio_count {
404 uint intrcount; /* Count of device interrupt callbacks */
405 uint lastintrs; /* Count as of last watchdog timer */
406 uint pollcnt; /* Count of active polls */
407 uint regfails; /* Count of R_REG failures */
408 uint tx_sderrs; /* Count of tx attempts with sd errors */
409 uint fcqueued; /* Tx packets that got queued */
410 uint rxrtx; /* Count of rtx requests (NAK to dongle) */
411 uint rx_toolong; /* Receive frames too long to receive */
412 uint rxc_errors; /* SDIO errors when reading control frames */
413 uint rx_hdrfail; /* SDIO errors on header reads */
414 uint rx_badhdr; /* Bad received headers (roosync?) */
415 uint rx_badseq; /* Mismatched rx sequence number */
416 uint fc_rcvd; /* Number of flow-control events received */
417 uint fc_xoff; /* Number which turned on flow-control */
418 uint fc_xon; /* Number which turned off flow-control */
419 uint rxglomfail; /* Failed deglom attempts */
420 uint rxglomframes; /* Number of glom frames (superframes) */
421 uint rxglompkts; /* Number of packets from glom frames */
422 uint f2rxhdrs; /* Number of header reads */
423 uint f2rxdata; /* Number of frame data reads */
424 uint f2txdata; /* Number of f2 frame writes */
425 uint f1regdata; /* Number of f1 register accesses */
426 uint tickcnt; /* Number of watchdog been schedule */
427 ulong tx_ctlerrs; /* Err of sending ctrl frames */
428 ulong tx_ctlpkts; /* Ctrl frames sent to dongle */
429 ulong rx_ctlerrs; /* Err of processing rx ctrl frames */
430 ulong rx_ctlpkts; /* Ctrl frames processed from dongle */
431 ulong rx_readahead_cnt; /* packets where header read-ahead was used */
432 };
433
434 /* misc chip info needed by some of the routines */
435 /* Private data for SDIO bus interaction */
436 struct brcmf_sdio {
437 struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
438 struct brcmf_chip *ci; /* Chip info struct */
439 struct brcmf_core *sdio_core; /* sdio core info struct */
440
441 u32 hostintmask; /* Copy of Host Interrupt Mask */
442 atomic_t intstatus; /* Intstatus bits (events) pending */
443 atomic_t fcstate; /* State of dongle flow-control */
444
445 uint blocksize; /* Block size of SDIO transfers */
446 uint roundup; /* Max roundup limit */
447
448 struct pktq txq; /* Queue length used for flow-control */
449 u8 flowcontrol; /* per prio flow control bitmask */
450 u8 tx_seq; /* Transmit sequence number (next) */
451 u8 tx_max; /* Maximum transmit sequence allowed */
452
453 u8 *hdrbuf; /* buffer for handling rx frame */
454 u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */
455 u8 rx_seq; /* Receive sequence number (expected) */
456 struct brcmf_sdio_hdrinfo cur_read;
457 /* info of current read frame */
458 bool rxskip; /* Skip receive (awaiting NAK ACK) */
459 bool rxpending; /* Data frame pending in dongle */
460
461 uint rxbound; /* Rx frames to read before resched */
462 uint txbound; /* Tx frames to send before resched */
463 uint txminmax;
464
465 struct sk_buff *glomd; /* Packet containing glomming descriptor */
466 struct sk_buff_head glom; /* Packet list for glommed superframe */
467
468 u8 *rxbuf; /* Buffer for receiving control packets */
469 uint rxblen; /* Allocated length of rxbuf */
470 u8 *rxctl; /* Aligned pointer into rxbuf */
471 u8 *rxctl_orig; /* pointer for freeing rxctl */
472 uint rxlen; /* Length of valid data in buffer */
473 spinlock_t rxctl_lock; /* protection lock for ctrl frame resources */
474
475 u8 sdpcm_ver; /* Bus protocol reported by dongle */
476
477 bool intr; /* Use interrupts */
478 bool poll; /* Use polling */
479 atomic_t ipend; /* Device interrupt is pending */
480 uint spurious; /* Count of spurious interrupts */
481 uint pollrate; /* Ticks between device polls */
482 uint polltick; /* Tick counter */
483
484 #ifdef DEBUG
485 uint console_interval;
486 struct brcmf_console console; /* Console output polling support */
487 uint console_addr; /* Console address from shared struct */
488 #endif /* DEBUG */
489
490 uint clkstate; /* State of sd and backplane clock(s) */
491 s32 idletime; /* Control for activity timeout */
492 s32 idlecount; /* Activity timeout counter */
493 s32 idleclock; /* How to set bus driver when idle */
494 bool rxflow_mode; /* Rx flow control mode */
495 bool rxflow; /* Is rx flow control on */
496 bool alp_only; /* Don't use HT clock (ALP only) */
497
498 u8 *ctrl_frame_buf;
499 u16 ctrl_frame_len;
500 bool ctrl_frame_stat;
501 int ctrl_frame_err;
502
503 spinlock_t txq_lock; /* protect bus->txq */
504 wait_queue_head_t ctrl_wait;
505 wait_queue_head_t dcmd_resp_wait;
506
507 struct timer_list timer;
508 struct completion watchdog_wait;
509 struct task_struct *watchdog_tsk;
510 bool wd_active;
511
512 struct workqueue_struct *brcmf_wq;
513 struct work_struct datawork;
514 bool dpc_triggered;
515 bool dpc_running;
516
517 bool txoff; /* Transmit flow-controlled */
518 struct brcmf_sdio_count sdcnt;
519 bool sr_enabled; /* SaveRestore enabled */
520 bool sleeping;
521
522 u8 tx_hdrlen; /* sdio bus header length for tx packet */
523 bool txglom; /* host tx glomming enable flag */
524 u16 head_align; /* buffer pointer alignment */
525 u16 sgentry_align; /* scatter-gather buffer alignment */
526 };
527
528 /* clkstate */
529 #define CLK_NONE 0
530 #define CLK_SDONLY 1
531 #define CLK_PENDING 2
532 #define CLK_AVAIL 3
533
534 #ifdef DEBUG
535 static int qcount[NUMPRIO];
536 #endif /* DEBUG */
537
538 #define DEFAULT_SDIO_DRIVE_STRENGTH 6 /* in milliamps */
539
540 #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
541
542 /* Limit on rounding up frames */
543 static const uint max_roundup = 512;
544
545 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
546 #define ALIGNMENT 8
547 #else
548 #define ALIGNMENT 4
549 #endif
550
551 enum brcmf_sdio_frmtype {
552 BRCMF_SDIO_FT_NORMAL,
553 BRCMF_SDIO_FT_SUPER,
554 BRCMF_SDIO_FT_SUB,
555 };
556
557 #define SDIOD_DRVSTR_KEY(chip, pmu) (((chip) << 16) | (pmu))
558
559 /* SDIO Pad drive strength to select value mappings */
560 struct sdiod_drive_str {
561 u8 strength; /* Pad Drive Strength in mA */
562 u8 sel; /* Chip-specific select value */
563 };
564
565 /* SDIO Drive Strength to sel value table for PMU Rev 11 (1.8V) */
566 static const struct sdiod_drive_str sdiod_drvstr_tab1_1v8[] = {
567 {32, 0x6},
568 {26, 0x7},
569 {22, 0x4},
570 {16, 0x5},
571 {12, 0x2},
572 {8, 0x3},
573 {4, 0x0},
574 {0, 0x1}
575 };
576
577 /* SDIO Drive Strength to sel value table for PMU Rev 13 (1.8v) */
578 static const struct sdiod_drive_str sdiod_drive_strength_tab5_1v8[] = {
579 {6, 0x7},
580 {5, 0x6},
581 {4, 0x5},
582 {3, 0x4},
583 {2, 0x2},
584 {1, 0x1},
585 {0, 0x0}
586 };
587
588 /* SDIO Drive Strength to sel value table for PMU Rev 17 (1.8v) */
589 static const struct sdiod_drive_str sdiod_drvstr_tab6_1v8[] = {
590 {3, 0x3},
591 {2, 0x2},
592 {1, 0x1},
593 {0, 0x0} };
594
595 /* SDIO Drive Strength to sel value table for 43143 PMU Rev 17 (3.3V) */
596 static const struct sdiod_drive_str sdiod_drvstr_tab2_3v3[] = {
597 {16, 0x7},
598 {12, 0x5},
599 {8, 0x3},
600 {4, 0x1}
601 };
602
603 BRCMF_FW_NVRAM_DEF(43143, "brcmfmac43143-sdio.bin", "brcmfmac43143-sdio.txt");
604 BRCMF_FW_NVRAM_DEF(43241B0, "brcmfmac43241b0-sdio.bin",
605 "brcmfmac43241b0-sdio.txt");
606 BRCMF_FW_NVRAM_DEF(43241B4, "brcmfmac43241b4-sdio.bin",
607 "brcmfmac43241b4-sdio.txt");
608 BRCMF_FW_NVRAM_DEF(43241B5, "brcmfmac43241b5-sdio.bin",
609 "brcmfmac43241b5-sdio.txt");
610 BRCMF_FW_NVRAM_DEF(4329, "brcmfmac4329-sdio.bin", "brcmfmac4329-sdio.txt");
611 BRCMF_FW_NVRAM_DEF(4330, "brcmfmac4330-sdio.bin", "brcmfmac4330-sdio.txt");
612 BRCMF_FW_NVRAM_DEF(4334, "brcmfmac4334-sdio.bin", "brcmfmac4334-sdio.txt");
613 BRCMF_FW_NVRAM_DEF(43340, "brcmfmac43340-sdio.bin", "brcmfmac43340-sdio.txt");
614 BRCMF_FW_NVRAM_DEF(4335, "brcmfmac4335-sdio.bin", "brcmfmac4335-sdio.txt");
615 BRCMF_FW_NVRAM_DEF(43362, "brcmfmac43362-sdio.bin", "brcmfmac43362-sdio.txt");
616 BRCMF_FW_NVRAM_DEF(4339, "brcmfmac4339-sdio.bin", "brcmfmac4339-sdio.txt");
617 BRCMF_FW_NVRAM_DEF(43430A0, "brcmfmac43430a0-sdio.bin", "brcmfmac43430a0-sdio.txt");
618 /* Note the names are not postfixed with a1 for backward compatibility */
619 BRCMF_FW_NVRAM_DEF(43430A1, "brcmfmac43430-sdio.bin", "brcmfmac43430-sdio.txt");
620 BRCMF_FW_NVRAM_DEF(43455, "brcmfmac43455-sdio.bin", "brcmfmac43455-sdio.txt");
621 BRCMF_FW_NVRAM_DEF(4354, "brcmfmac4354-sdio.bin", "brcmfmac4354-sdio.txt");
622 BRCMF_FW_NVRAM_DEF(4356, "brcmfmac4356-sdio.bin", "brcmfmac4356-sdio.txt");
623 BRCMF_FW_NVRAM_DEF(4373, "brcmfmac4373-sdio.bin", "brcmfmac4373-sdio.txt");
624
625 static struct brcmf_firmware_mapping brcmf_sdio_fwnames[] = {
626 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143),
627 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43241_CHIP_ID, 0x0000001F, 43241B0),
628 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43241_CHIP_ID, 0x00000020, 43241B4),
629 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43241_CHIP_ID, 0xFFFFFFC0, 43241B5),
630 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4329_CHIP_ID, 0xFFFFFFFF, 4329),
631 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4330_CHIP_ID, 0xFFFFFFFF, 4330),
632 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4334_CHIP_ID, 0xFFFFFFFF, 4334),
633 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43340_CHIP_ID, 0xFFFFFFFF, 43340),
634 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43341_CHIP_ID, 0xFFFFFFFF, 43340),
635 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4335_CHIP_ID, 0xFFFFFFFF, 4335),
636 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43362_CHIP_ID, 0xFFFFFFFE, 43362),
637 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4339_CHIP_ID, 0xFFFFFFFF, 4339),
638 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43430_CHIP_ID, 0x00000001, 43430A0),
639 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_43430_CHIP_ID, 0xFFFFFFFE, 43430A1),
640 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4345_CHIP_ID, 0xFFFFFFC0, 43455),
641 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4354_CHIP_ID, 0xFFFFFFFF, 4354),
642 BRCMF_FW_NVRAM_ENTRY(BRCM_CC_4356_CHIP_ID, 0xFFFFFFFF, 4356),
643 BRCMF_FW_NVRAM_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373)
644 };
645
646 static void pkt_align(struct sk_buff *p, int len, int align)
647 {
648 uint datalign;
649 datalign = (unsigned long)(p->data);
650 datalign = roundup(datalign, (align)) - datalign;
651 if (datalign)
652 skb_pull(p, datalign);
653 __skb_trim(p, len);
654 }
655
656 /* To check if there's window offered */
657 static bool data_ok(struct brcmf_sdio *bus)
658 {
659 return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
660 ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
661 }
662
663 static int
664 brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on)
665 {
666 u8 wr_val = 0, rd_val, cmp_val, bmask;
667 int err = 0;
668 int err_cnt = 0;
669 int try_cnt = 0;
670
671 brcmf_dbg(TRACE, "Enter: on=%d\n", on);
672
673 wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
674 /* 1st KSO write goes to AOS wake up core if device is asleep */
675 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, wr_val, &err);
676
677 if (on) {
678 /* device WAKEUP through KSO:
679 * write bit 0 & read back until
680 * both bits 0 (kso bit) & 1 (dev on status) are set
681 */
682 cmp_val = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK |
683 SBSDIO_FUNC1_SLEEPCSR_DEVON_MASK;
684 bmask = cmp_val;
685 usleep_range(2000, 3000);
686 } else {
687 /* Put device to sleep, turn off KSO */
688 cmp_val = 0;
689 /* only check for bit0, bit1(dev on status) may not
690 * get cleared right away
691 */
692 bmask = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK;
693 }
694
695 do {
696 /* reliable KSO bit set/clr:
697 * the sdiod sleep write access is synced to PMU 32khz clk
698 * just one write attempt may fail,
699 * read it back until it matches written value
700 */
701 rd_val = brcmf_sdiod_readb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
702 &err);
703 if (!err) {
704 if ((rd_val & bmask) == cmp_val)
705 break;
706 err_cnt = 0;
707 }
708 /* bail out upon subsequent access errors */
709 if (err && (err_cnt++ > BRCMF_SDIO_MAX_ACCESS_ERRORS))
710 break;
711
712 udelay(KSO_WAIT_US);
713 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, wr_val,
714 &err);
715
716 } while (try_cnt++ < MAX_KSO_ATTEMPTS);
717
718 if (try_cnt > 2)
719 brcmf_dbg(SDIO, "try_cnt=%d rd_val=0x%x err=%d\n", try_cnt,
720 rd_val, err);
721
722 if (try_cnt > MAX_KSO_ATTEMPTS)
723 brcmf_err("max tries: rd_val=0x%x err=%d\n", rd_val, err);
724
725 return err;
726 }
727
728 #define HOSTINTMASK (I_HMB_SW_MASK | I_CHIPACTIVE)
729
730 /* Turn backplane clock on or off */
731 static int brcmf_sdio_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
732 {
733 int err;
734 u8 clkctl, clkreq, devctl;
735 unsigned long timeout;
736
737 brcmf_dbg(SDIO, "Enter\n");
738
739 clkctl = 0;
740
741 if (bus->sr_enabled) {
742 bus->clkstate = (on ? CLK_AVAIL : CLK_SDONLY);
743 return 0;
744 }
745
746 if (on) {
747 /* Request HT Avail */
748 clkreq =
749 bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
750
751 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
752 clkreq, &err);
753 if (err) {
754 brcmf_err("HT Avail request error: %d\n", err);
755 return -EBADE;
756 }
757
758 /* Check current status */
759 clkctl = brcmf_sdiod_readb(bus->sdiodev,
760 SBSDIO_FUNC1_CHIPCLKCSR, &err);
761 if (err) {
762 brcmf_err("HT Avail read error: %d\n", err);
763 return -EBADE;
764 }
765
766 /* Go to pending and await interrupt if appropriate */
767 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
768 /* Allow only clock-available interrupt */
769 devctl = brcmf_sdiod_readb(bus->sdiodev,
770 SBSDIO_DEVICE_CTL, &err);
771 if (err) {
772 brcmf_err("Devctl error setting CA: %d\n", err);
773 return -EBADE;
774 }
775
776 devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
777 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_DEVICE_CTL,
778 devctl, &err);
779 brcmf_dbg(SDIO, "CLKCTL: set PENDING\n");
780 bus->clkstate = CLK_PENDING;
781
782 return 0;
783 } else if (bus->clkstate == CLK_PENDING) {
784 /* Cancel CA-only interrupt filter */
785 devctl = brcmf_sdiod_readb(bus->sdiodev,
786 SBSDIO_DEVICE_CTL, &err);
787 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
788 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_DEVICE_CTL,
789 devctl, &err);
790 }
791
792 /* Otherwise, wait here (polling) for HT Avail */
793 timeout = jiffies +
794 msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
795 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
796 clkctl = brcmf_sdiod_readb(bus->sdiodev,
797 SBSDIO_FUNC1_CHIPCLKCSR,
798 &err);
799 if (time_after(jiffies, timeout))
800 break;
801 else
802 usleep_range(5000, 10000);
803 }
804 if (err) {
805 brcmf_err("HT Avail request error: %d\n", err);
806 return -EBADE;
807 }
808 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
809 brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n",
810 PMU_MAX_TRANSITION_DLY, clkctl);
811 return -EBADE;
812 }
813
814 /* Mark clock available */
815 bus->clkstate = CLK_AVAIL;
816 brcmf_dbg(SDIO, "CLKCTL: turned ON\n");
817
818 #if defined(DEBUG)
819 if (!bus->alp_only) {
820 if (SBSDIO_ALPONLY(clkctl))
821 brcmf_err("HT Clock should be on\n");
822 }
823 #endif /* defined (DEBUG) */
824
825 } else {
826 clkreq = 0;
827
828 if (bus->clkstate == CLK_PENDING) {
829 /* Cancel CA-only interrupt filter */
830 devctl = brcmf_sdiod_readb(bus->sdiodev,
831 SBSDIO_DEVICE_CTL, &err);
832 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
833 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_DEVICE_CTL,
834 devctl, &err);
835 }
836
837 bus->clkstate = CLK_SDONLY;
838 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
839 clkreq, &err);
840 brcmf_dbg(SDIO, "CLKCTL: turned OFF\n");
841 if (err) {
842 brcmf_err("Failed access turning clock off: %d\n",
843 err);
844 return -EBADE;
845 }
846 }
847 return 0;
848 }
849
850 /* Change idle/active SD state */
851 static int brcmf_sdio_sdclk(struct brcmf_sdio *bus, bool on)
852 {
853 brcmf_dbg(SDIO, "Enter\n");
854
855 if (on)
856 bus->clkstate = CLK_SDONLY;
857 else
858 bus->clkstate = CLK_NONE;
859
860 return 0;
861 }
862
863 /* Transition SD and backplane clock readiness */
864 static int brcmf_sdio_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
865 {
866 #ifdef DEBUG
867 uint oldstate = bus->clkstate;
868 #endif /* DEBUG */
869
870 brcmf_dbg(SDIO, "Enter\n");
871
872 /* Early exit if we're already there */
873 if (bus->clkstate == target)
874 return 0;
875
876 switch (target) {
877 case CLK_AVAIL:
878 /* Make sure SD clock is available */
879 if (bus->clkstate == CLK_NONE)
880 brcmf_sdio_sdclk(bus, true);
881 /* Now request HT Avail on the backplane */
882 brcmf_sdio_htclk(bus, true, pendok);
883 break;
884
885 case CLK_SDONLY:
886 /* Remove HT request, or bring up SD clock */
887 if (bus->clkstate == CLK_NONE)
888 brcmf_sdio_sdclk(bus, true);
889 else if (bus->clkstate == CLK_AVAIL)
890 brcmf_sdio_htclk(bus, false, false);
891 else
892 brcmf_err("request for %d -> %d\n",
893 bus->clkstate, target);
894 break;
895
896 case CLK_NONE:
897 /* Make sure to remove HT request */
898 if (bus->clkstate == CLK_AVAIL)
899 brcmf_sdio_htclk(bus, false, false);
900 /* Now remove the SD clock */
901 brcmf_sdio_sdclk(bus, false);
902 break;
903 }
904 #ifdef DEBUG
905 brcmf_dbg(SDIO, "%d -> %d\n", oldstate, bus->clkstate);
906 #endif /* DEBUG */
907
908 return 0;
909 }
910
911 static int
912 brcmf_sdio_bus_sleep(struct brcmf_sdio *bus, bool sleep, bool pendok)
913 {
914 int err = 0;
915 u8 clkcsr;
916
917 brcmf_dbg(SDIO, "Enter: request %s currently %s\n",
918 (sleep ? "SLEEP" : "WAKE"),
919 (bus->sleeping ? "SLEEP" : "WAKE"));
920
921 /* If SR is enabled control bus state with KSO */
922 if (bus->sr_enabled) {
923 /* Done if we're already in the requested state */
924 if (sleep == bus->sleeping)
925 goto end;
926
927 /* Going to sleep */
928 if (sleep) {
929 clkcsr = brcmf_sdiod_readb(bus->sdiodev,
930 SBSDIO_FUNC1_CHIPCLKCSR,
931 &err);
932 if ((clkcsr & SBSDIO_CSR_MASK) == 0) {
933 brcmf_dbg(SDIO, "no clock, set ALP\n");
934 brcmf_sdiod_writeb(bus->sdiodev,
935 SBSDIO_FUNC1_CHIPCLKCSR,
936 SBSDIO_ALP_AVAIL_REQ, &err);
937 }
938 err = brcmf_sdio_kso_control(bus, false);
939 } else {
940 err = brcmf_sdio_kso_control(bus, true);
941 }
942 if (err) {
943 brcmf_err("error while changing bus sleep state %d\n",
944 err);
945 goto done;
946 }
947 }
948
949 end:
950 /* control clocks */
951 if (sleep) {
952 if (!bus->sr_enabled)
953 brcmf_sdio_clkctl(bus, CLK_NONE, pendok);
954 } else {
955 brcmf_sdio_clkctl(bus, CLK_AVAIL, pendok);
956 brcmf_sdio_wd_timer(bus, true);
957 }
958 bus->sleeping = sleep;
959 brcmf_dbg(SDIO, "new state %s\n",
960 (sleep ? "SLEEP" : "WAKE"));
961 done:
962 brcmf_dbg(SDIO, "Exit: err=%d\n", err);
963 return err;
964
965 }
966
967 #ifdef DEBUG
968 static inline bool brcmf_sdio_valid_shared_address(u32 addr)
969 {
970 return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
971 }
972
973 static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
974 struct sdpcm_shared *sh)
975 {
976 u32 addr = 0;
977 int rv;
978 u32 shaddr = 0;
979 struct sdpcm_shared_le sh_le;
980 __le32 addr_le;
981
982 sdio_claim_host(bus->sdiodev->func1);
983 brcmf_sdio_bus_sleep(bus, false, false);
984
985 /*
986 * Read last word in socram to determine
987 * address of sdpcm_shared structure
988 */
989 shaddr = bus->ci->rambase + bus->ci->ramsize - 4;
990 if (!bus->ci->rambase && brcmf_chip_sr_capable(bus->ci))
991 shaddr -= bus->ci->srsize;
992 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, shaddr,
993 (u8 *)&addr_le, 4);
994 if (rv < 0)
995 goto fail;
996
997 /*
998 * Check if addr is valid.
999 * NVRAM length at the end of memory should have been overwritten.
1000 */
1001 addr = le32_to_cpu(addr_le);
1002 if (!brcmf_sdio_valid_shared_address(addr)) {
1003 brcmf_err("invalid sdpcm_shared address 0x%08X\n", addr);
1004 rv = -EINVAL;
1005 goto fail;
1006 }
1007
1008 brcmf_dbg(INFO, "sdpcm_shared address 0x%08X\n", addr);
1009
1010 /* Read hndrte_shared structure */
1011 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&sh_le,
1012 sizeof(struct sdpcm_shared_le));
1013 if (rv < 0)
1014 goto fail;
1015
1016 sdio_release_host(bus->sdiodev->func1);
1017
1018 /* Endianness */
1019 sh->flags = le32_to_cpu(sh_le.flags);
1020 sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
1021 sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
1022 sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
1023 sh->assert_line = le32_to_cpu(sh_le.assert_line);
1024 sh->console_addr = le32_to_cpu(sh_le.console_addr);
1025 sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
1026
1027 if ((sh->flags & SDPCM_SHARED_VERSION_MASK) > SDPCM_SHARED_VERSION) {
1028 brcmf_err("sdpcm shared version unsupported: dhd %d dongle %d\n",
1029 SDPCM_SHARED_VERSION,
1030 sh->flags & SDPCM_SHARED_VERSION_MASK);
1031 return -EPROTO;
1032 }
1033 return 0;
1034
1035 fail:
1036 brcmf_err("unable to obtain sdpcm_shared info: rv=%d (addr=0x%x)\n",
1037 rv, addr);
1038 sdio_release_host(bus->sdiodev->func1);
1039 return rv;
1040 }
1041
1042 static void brcmf_sdio_get_console_addr(struct brcmf_sdio *bus)
1043 {
1044 struct sdpcm_shared sh;
1045
1046 if (brcmf_sdio_readshared(bus, &sh) == 0)
1047 bus->console_addr = sh.console_addr;
1048 }
1049 #else
1050 static void brcmf_sdio_get_console_addr(struct brcmf_sdio *bus)
1051 {
1052 }
1053 #endif /* DEBUG */
1054
1055 static u32 brcmf_sdio_hostmail(struct brcmf_sdio *bus)
1056 {
1057 struct brcmf_sdio_dev *sdiod = bus->sdiodev;
1058 struct brcmf_core *core = bus->sdio_core;
1059 u32 intstatus = 0;
1060 u32 hmb_data;
1061 u8 fcbits;
1062 int ret;
1063
1064 brcmf_dbg(SDIO, "Enter\n");
1065
1066 /* Read mailbox data and ack that we did so */
1067 hmb_data = brcmf_sdiod_readl(sdiod,
1068 core->base + SD_REG(tohostmailboxdata),
1069 &ret);
1070
1071 if (!ret)
1072 brcmf_sdiod_writel(sdiod, core->base + SD_REG(tosbmailbox),
1073 SMB_INT_ACK, &ret);
1074
1075 bus->sdcnt.f1regdata += 2;
1076
1077 /* dongle indicates the firmware has halted/crashed */
1078 if (hmb_data & HMB_DATA_FWHALT)
1079 brcmf_err("mailbox indicates firmware halted\n");
1080
1081 /* Dongle recomposed rx frames, accept them again */
1082 if (hmb_data & HMB_DATA_NAKHANDLED) {
1083 brcmf_dbg(SDIO, "Dongle reports NAK handled, expect rtx of %d\n",
1084 bus->rx_seq);
1085 if (!bus->rxskip)
1086 brcmf_err("unexpected NAKHANDLED!\n");
1087
1088 bus->rxskip = false;
1089 intstatus |= I_HMB_FRAME_IND;
1090 }
1091
1092 /*
1093 * DEVREADY does not occur with gSPI.
1094 */
1095 if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
1096 bus->sdpcm_ver =
1097 (hmb_data & HMB_DATA_VERSION_MASK) >>
1098 HMB_DATA_VERSION_SHIFT;
1099 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
1100 brcmf_err("Version mismatch, dongle reports %d, "
1101 "expecting %d\n",
1102 bus->sdpcm_ver, SDPCM_PROT_VERSION);
1103 else
1104 brcmf_dbg(SDIO, "Dongle ready, protocol version %d\n",
1105 bus->sdpcm_ver);
1106
1107 /*
1108 * Retrieve console state address now that firmware should have
1109 * updated it.
1110 */
1111 brcmf_sdio_get_console_addr(bus);
1112 }
1113
1114 /*
1115 * Flow Control has been moved into the RX headers and this out of band
1116 * method isn't used any more.
1117 * remaining backward compatible with older dongles.
1118 */
1119 if (hmb_data & HMB_DATA_FC) {
1120 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
1121 HMB_DATA_FCDATA_SHIFT;
1122
1123 if (fcbits & ~bus->flowcontrol)
1124 bus->sdcnt.fc_xoff++;
1125
1126 if (bus->flowcontrol & ~fcbits)
1127 bus->sdcnt.fc_xon++;
1128
1129 bus->sdcnt.fc_rcvd++;
1130 bus->flowcontrol = fcbits;
1131 }
1132
1133 /* Shouldn't be any others */
1134 if (hmb_data & ~(HMB_DATA_DEVREADY |
1135 HMB_DATA_NAKHANDLED |
1136 HMB_DATA_FC |
1137 HMB_DATA_FWREADY |
1138 HMB_DATA_FWHALT |
1139 HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
1140 brcmf_err("Unknown mailbox data content: 0x%02x\n",
1141 hmb_data);
1142
1143 return intstatus;
1144 }
1145
1146 static void brcmf_sdio_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
1147 {
1148 struct brcmf_sdio_dev *sdiod = bus->sdiodev;
1149 struct brcmf_core *core = bus->sdio_core;
1150 uint retries = 0;
1151 u16 lastrbc;
1152 u8 hi, lo;
1153 int err;
1154
1155 brcmf_err("%sterminate frame%s\n",
1156 abort ? "abort command, " : "",
1157 rtx ? ", send NAK" : "");
1158
1159 if (abort)
1160 brcmf_sdiod_abort(bus->sdiodev, bus->sdiodev->func2);
1161
1162 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL, SFC_RF_TERM,
1163 &err);
1164 bus->sdcnt.f1regdata++;
1165
1166 /* Wait until the packet has been flushed (device/FIFO stable) */
1167 for (lastrbc = retries = 0xffff; retries > 0; retries--) {
1168 hi = brcmf_sdiod_readb(bus->sdiodev, SBSDIO_FUNC1_RFRAMEBCHI,
1169 &err);
1170 lo = brcmf_sdiod_readb(bus->sdiodev, SBSDIO_FUNC1_RFRAMEBCLO,
1171 &err);
1172 bus->sdcnt.f1regdata += 2;
1173
1174 if ((hi == 0) && (lo == 0))
1175 break;
1176
1177 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
1178 brcmf_err("count growing: last 0x%04x now 0x%04x\n",
1179 lastrbc, (hi << 8) + lo);
1180 }
1181 lastrbc = (hi << 8) + lo;
1182 }
1183
1184 if (!retries)
1185 brcmf_err("count never zeroed: last 0x%04x\n", lastrbc);
1186 else
1187 brcmf_dbg(SDIO, "flush took %d iterations\n", 0xffff - retries);
1188
1189 if (rtx) {
1190 bus->sdcnt.rxrtx++;
1191 brcmf_sdiod_writel(sdiod, core->base + SD_REG(tosbmailbox),
1192 SMB_NAK, &err);
1193
1194 bus->sdcnt.f1regdata++;
1195 if (err == 0)
1196 bus->rxskip = true;
1197 }
1198
1199 /* Clear partial in any case */
1200 bus->cur_read.len = 0;
1201 }
1202
1203 static void brcmf_sdio_txfail(struct brcmf_sdio *bus)
1204 {
1205 struct brcmf_sdio_dev *sdiodev = bus->sdiodev;
1206 u8 i, hi, lo;
1207
1208 /* On failure, abort the command and terminate the frame */
1209 brcmf_err("sdio error, abort command and terminate frame\n");
1210 bus->sdcnt.tx_sderrs++;
1211
1212 brcmf_sdiod_abort(sdiodev, sdiodev->func2);
1213 brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_FRAMECTRL, SFC_WF_TERM, NULL);
1214 bus->sdcnt.f1regdata++;
1215
1216 for (i = 0; i < 3; i++) {
1217 hi = brcmf_sdiod_readb(sdiodev, SBSDIO_FUNC1_WFRAMEBCHI, NULL);
1218 lo = brcmf_sdiod_readb(sdiodev, SBSDIO_FUNC1_WFRAMEBCLO, NULL);
1219 bus->sdcnt.f1regdata += 2;
1220 if ((hi == 0) && (lo == 0))
1221 break;
1222 }
1223 }
1224
1225 /* return total length of buffer chain */
1226 static uint brcmf_sdio_glom_len(struct brcmf_sdio *bus)
1227 {
1228 struct sk_buff *p;
1229 uint total;
1230
1231 total = 0;
1232 skb_queue_walk(&bus->glom, p)
1233 total += p->len;
1234 return total;
1235 }
1236
1237 static void brcmf_sdio_free_glom(struct brcmf_sdio *bus)
1238 {
1239 struct sk_buff *cur, *next;
1240
1241 skb_queue_walk_safe(&bus->glom, cur, next) {
1242 skb_unlink(cur, &bus->glom);
1243 brcmu_pkt_buf_free_skb(cur);
1244 }
1245 }
1246
1247 /**
1248 * brcmfmac sdio bus specific header
1249 * This is the lowest layer header wrapped on the packets transmitted between
1250 * host and WiFi dongle which contains information needed for SDIO core and
1251 * firmware
1252 *
1253 * It consists of 3 parts: hardware header, hardware extension header and
1254 * software header
1255 * hardware header (frame tag) - 4 bytes
1256 * Byte 0~1: Frame length
1257 * Byte 2~3: Checksum, bit-wise inverse of frame length
1258 * hardware extension header - 8 bytes
1259 * Tx glom mode only, N/A for Rx or normal Tx
1260 * Byte 0~1: Packet length excluding hw frame tag
1261 * Byte 2: Reserved
1262 * Byte 3: Frame flags, bit 0: last frame indication
1263 * Byte 4~5: Reserved
1264 * Byte 6~7: Tail padding length
1265 * software header - 8 bytes
1266 * Byte 0: Rx/Tx sequence number
1267 * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
1268 * Byte 2: Length of next data frame, reserved for Tx
1269 * Byte 3: Data offset
1270 * Byte 4: Flow control bits, reserved for Tx
1271 * Byte 5: Maximum Sequence number allowed by firmware for Tx, N/A for Tx packet
1272 * Byte 6~7: Reserved
1273 */
1274 #define SDPCM_HWHDR_LEN 4
1275 #define SDPCM_HWEXT_LEN 8
1276 #define SDPCM_SWHDR_LEN 8
1277 #define SDPCM_HDRLEN (SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN)
1278 /* software header */
1279 #define SDPCM_SEQ_MASK 0x000000ff
1280 #define SDPCM_SEQ_WRAP 256
1281 #define SDPCM_CHANNEL_MASK 0x00000f00
1282 #define SDPCM_CHANNEL_SHIFT 8
1283 #define SDPCM_CONTROL_CHANNEL 0 /* Control */
1284 #define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication */
1285 #define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv */
1286 #define SDPCM_GLOM_CHANNEL 3 /* Coalesced packets */
1287 #define SDPCM_TEST_CHANNEL 15 /* Test/debug packets */
1288 #define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80)
1289 #define SDPCM_NEXTLEN_MASK 0x00ff0000
1290 #define SDPCM_NEXTLEN_SHIFT 16
1291 #define SDPCM_DOFFSET_MASK 0xff000000
1292 #define SDPCM_DOFFSET_SHIFT 24
1293 #define SDPCM_FCMASK_MASK 0x000000ff
1294 #define SDPCM_WINDOW_MASK 0x0000ff00
1295 #define SDPCM_WINDOW_SHIFT 8
1296
1297 static inline u8 brcmf_sdio_getdatoffset(u8 *swheader)
1298 {
1299 u32 hdrvalue;
1300 hdrvalue = *(u32 *)swheader;
1301 return (u8)((hdrvalue & SDPCM_DOFFSET_MASK) >> SDPCM_DOFFSET_SHIFT);
1302 }
1303
1304 static inline bool brcmf_sdio_fromevntchan(u8 *swheader)
1305 {
1306 u32 hdrvalue;
1307 u8 ret;
1308
1309 hdrvalue = *(u32 *)swheader;
1310 ret = (u8)((hdrvalue & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT);
1311
1312 return (ret == SDPCM_EVENT_CHANNEL);
1313 }
1314
1315 static int brcmf_sdio_hdparse(struct brcmf_sdio *bus, u8 *header,
1316 struct brcmf_sdio_hdrinfo *rd,
1317 enum brcmf_sdio_frmtype type)
1318 {
1319 u16 len, checksum;
1320 u8 rx_seq, fc, tx_seq_max;
1321 u32 swheader;
1322
1323 trace_brcmf_sdpcm_hdr(SDPCM_RX, header);
1324
1325 /* hw header */
1326 len = get_unaligned_le16(header);
1327 checksum = get_unaligned_le16(header + sizeof(u16));
1328 /* All zero means no more to read */
1329 if (!(len | checksum)) {
1330 bus->rxpending = false;
1331 return -ENODATA;
1332 }
1333 if ((u16)(~(len ^ checksum))) {
1334 brcmf_err("HW header checksum error\n");
1335 bus->sdcnt.rx_badhdr++;
1336 brcmf_sdio_rxfail(bus, false, false);
1337 return -EIO;
1338 }
1339 if (len < SDPCM_HDRLEN) {
1340 brcmf_err("HW header length error\n");
1341 return -EPROTO;
1342 }
1343 if (type == BRCMF_SDIO_FT_SUPER &&
1344 (roundup(len, bus->blocksize) != rd->len)) {
1345 brcmf_err("HW superframe header length error\n");
1346 return -EPROTO;
1347 }
1348 if (type == BRCMF_SDIO_FT_SUB && len > rd->len) {
1349 brcmf_err("HW subframe header length error\n");
1350 return -EPROTO;
1351 }
1352 rd->len = len;
1353
1354 /* software header */
1355 header += SDPCM_HWHDR_LEN;
1356 swheader = le32_to_cpu(*(__le32 *)header);
1357 if (type == BRCMF_SDIO_FT_SUPER && SDPCM_GLOMDESC(header)) {
1358 brcmf_err("Glom descriptor found in superframe head\n");
1359 rd->len = 0;
1360 return -EINVAL;
1361 }
1362 rx_seq = (u8)(swheader & SDPCM_SEQ_MASK);
1363 rd->channel = (swheader & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT;
1364 if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
1365 type != BRCMF_SDIO_FT_SUPER) {
1366 brcmf_err("HW header length too long\n");
1367 bus->sdcnt.rx_toolong++;
1368 brcmf_sdio_rxfail(bus, false, false);
1369 rd->len = 0;
1370 return -EPROTO;
1371 }
1372 if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) {
1373 brcmf_err("Wrong channel for superframe\n");
1374 rd->len = 0;
1375 return -EINVAL;
1376 }
1377 if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL &&
1378 rd->channel != SDPCM_EVENT_CHANNEL) {
1379 brcmf_err("Wrong channel for subframe\n");
1380 rd->len = 0;
1381 return -EINVAL;
1382 }
1383 rd->dat_offset = brcmf_sdio_getdatoffset(header);
1384 if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
1385 brcmf_err("seq %d: bad data offset\n", rx_seq);
1386 bus->sdcnt.rx_badhdr++;
1387 brcmf_sdio_rxfail(bus, false, false);
1388 rd->len = 0;
1389 return -ENXIO;
1390 }
1391 if (rd->seq_num != rx_seq) {
1392 brcmf_dbg(SDIO, "seq %d, expected %d\n", rx_seq, rd->seq_num);
1393 bus->sdcnt.rx_badseq++;
1394 rd->seq_num = rx_seq;
1395 }
1396 /* no need to check the reset for subframe */
1397 if (type == BRCMF_SDIO_FT_SUB)
1398 return 0;
1399 rd->len_nxtfrm = (swheader & SDPCM_NEXTLEN_MASK) >> SDPCM_NEXTLEN_SHIFT;
1400 if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
1401 /* only warm for NON glom packet */
1402 if (rd->channel != SDPCM_GLOM_CHANNEL)
1403 brcmf_err("seq %d: next length error\n", rx_seq);
1404 rd->len_nxtfrm = 0;
1405 }
1406 swheader = le32_to_cpu(*(__le32 *)(header + 4));
1407 fc = swheader & SDPCM_FCMASK_MASK;
1408 if (bus->flowcontrol != fc) {
1409 if (~bus->flowcontrol & fc)
1410 bus->sdcnt.fc_xoff++;
1411 if (bus->flowcontrol & ~fc)
1412 bus->sdcnt.fc_xon++;
1413 bus->sdcnt.fc_rcvd++;
1414 bus->flowcontrol = fc;
1415 }
1416 tx_seq_max = (swheader & SDPCM_WINDOW_MASK) >> SDPCM_WINDOW_SHIFT;
1417 if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
1418 brcmf_err("seq %d: max tx seq number error\n", rx_seq);
1419 tx_seq_max = bus->tx_seq + 2;
1420 }
1421 bus->tx_max = tx_seq_max;
1422
1423 return 0;
1424 }
1425
1426 static inline void brcmf_sdio_update_hwhdr(u8 *header, u16 frm_length)
1427 {
1428 *(__le16 *)header = cpu_to_le16(frm_length);
1429 *(((__le16 *)header) + 1) = cpu_to_le16(~frm_length);
1430 }
1431
1432 static void brcmf_sdio_hdpack(struct brcmf_sdio *bus, u8 *header,
1433 struct brcmf_sdio_hdrinfo *hd_info)
1434 {
1435 u32 hdrval;
1436 u8 hdr_offset;
1437
1438 brcmf_sdio_update_hwhdr(header, hd_info->len);
1439 hdr_offset = SDPCM_HWHDR_LEN;
1440
1441 if (bus->txglom) {
1442 hdrval = (hd_info->len - hdr_offset) | (hd_info->lastfrm << 24);
1443 *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval);
1444 hdrval = (u16)hd_info->tail_pad << 16;
1445 *(((__le32 *)(header + hdr_offset)) + 1) = cpu_to_le32(hdrval);
1446 hdr_offset += SDPCM_HWEXT_LEN;
1447 }
1448
1449 hdrval = hd_info->seq_num;
1450 hdrval |= (hd_info->channel << SDPCM_CHANNEL_SHIFT) &
1451 SDPCM_CHANNEL_MASK;
1452 hdrval |= (hd_info->dat_offset << SDPCM_DOFFSET_SHIFT) &
1453 SDPCM_DOFFSET_MASK;
1454 *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval);
1455 *(((__le32 *)(header + hdr_offset)) + 1) = 0;
1456 trace_brcmf_sdpcm_hdr(SDPCM_TX + !!(bus->txglom), header);
1457 }
1458
1459 static u8 brcmf_sdio_rxglom(struct brcmf_sdio *bus, u8 rxseq)
1460 {
1461 u16 dlen, totlen;
1462 u8 *dptr, num = 0;
1463 u16 sublen;
1464 struct sk_buff *pfirst, *pnext;
1465
1466 int errcode;
1467 u8 doff, sfdoff;
1468
1469 struct brcmf_sdio_hdrinfo rd_new;
1470
1471 /* If packets, issue read(s) and send up packet chain */
1472 /* Return sequence numbers consumed? */
1473
1474 brcmf_dbg(SDIO, "start: glomd %p glom %p\n",
1475 bus->glomd, skb_peek(&bus->glom));
1476
1477 /* If there's a descriptor, generate the packet chain */
1478 if (bus->glomd) {
1479 pfirst = pnext = NULL;
1480 dlen = (u16) (bus->glomd->len);
1481 dptr = bus->glomd->data;
1482 if (!dlen || (dlen & 1)) {
1483 brcmf_err("bad glomd len(%d), ignore descriptor\n",
1484 dlen);
1485 dlen = 0;
1486 }
1487
1488 for (totlen = num = 0; dlen; num++) {
1489 /* Get (and move past) next length */
1490 sublen = get_unaligned_le16(dptr);
1491 dlen -= sizeof(u16);
1492 dptr += sizeof(u16);
1493 if ((sublen < SDPCM_HDRLEN) ||
1494 ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1495 brcmf_err("descriptor len %d bad: %d\n",
1496 num, sublen);
1497 pnext = NULL;
1498 break;
1499 }
1500 if (sublen % bus->sgentry_align) {
1501 brcmf_err("sublen %d not multiple of %d\n",
1502 sublen, bus->sgentry_align);
1503 }
1504 totlen += sublen;
1505
1506 /* For last frame, adjust read len so total
1507 is a block multiple */
1508 if (!dlen) {
1509 sublen +=
1510 (roundup(totlen, bus->blocksize) - totlen);
1511 totlen = roundup(totlen, bus->blocksize);
1512 }
1513
1514 /* Allocate/chain packet for next subframe */
1515 pnext = brcmu_pkt_buf_get_skb(sublen + bus->sgentry_align);
1516 if (pnext == NULL) {
1517 brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
1518 num, sublen);
1519 break;
1520 }
1521 skb_queue_tail(&bus->glom, pnext);
1522
1523 /* Adhere to start alignment requirements */
1524 pkt_align(pnext, sublen, bus->sgentry_align);
1525 }
1526
1527 /* If all allocations succeeded, save packet chain
1528 in bus structure */
1529 if (pnext) {
1530 brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1531 totlen, num);
1532 if (BRCMF_GLOM_ON() && bus->cur_read.len &&
1533 totlen != bus->cur_read.len) {
1534 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1535 bus->cur_read.len, totlen, rxseq);
1536 }
1537 pfirst = pnext = NULL;
1538 } else {
1539 brcmf_sdio_free_glom(bus);
1540 num = 0;
1541 }
1542
1543 /* Done with descriptor packet */
1544 brcmu_pkt_buf_free_skb(bus->glomd);
1545 bus->glomd = NULL;
1546 bus->cur_read.len = 0;
1547 }
1548
1549 /* Ok -- either we just generated a packet chain,
1550 or had one from before */
1551 if (!skb_queue_empty(&bus->glom)) {
1552 if (BRCMF_GLOM_ON()) {
1553 brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
1554 skb_queue_walk(&bus->glom, pnext) {
1555 brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n",
1556 pnext, (u8 *) (pnext->data),
1557 pnext->len, pnext->len);
1558 }
1559 }
1560
1561 pfirst = skb_peek(&bus->glom);
1562 dlen = (u16) brcmf_sdio_glom_len(bus);
1563
1564 /* Do an SDIO read for the superframe. Configurable iovar to
1565 * read directly into the chained packet, or allocate a large
1566 * packet and and copy into the chain.
1567 */
1568 sdio_claim_host(bus->sdiodev->func1);
1569 errcode = brcmf_sdiod_recv_chain(bus->sdiodev,
1570 &bus->glom, dlen);
1571 sdio_release_host(bus->sdiodev->func1);
1572 bus->sdcnt.f2rxdata++;
1573
1574 /* On failure, kill the superframe */
1575 if (errcode < 0) {
1576 brcmf_err("glom read of %d bytes failed: %d\n",
1577 dlen, errcode);
1578
1579 sdio_claim_host(bus->sdiodev->func1);
1580 brcmf_sdio_rxfail(bus, true, false);
1581 bus->sdcnt.rxglomfail++;
1582 brcmf_sdio_free_glom(bus);
1583 sdio_release_host(bus->sdiodev->func1);
1584 return 0;
1585 }
1586
1587 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1588 pfirst->data, min_t(int, pfirst->len, 48),
1589 "SUPERFRAME:\n");
1590
1591 rd_new.seq_num = rxseq;
1592 rd_new.len = dlen;
1593 sdio_claim_host(bus->sdiodev->func1);
1594 errcode = brcmf_sdio_hdparse(bus, pfirst->data, &rd_new,
1595 BRCMF_SDIO_FT_SUPER);
1596 sdio_release_host(bus->sdiodev->func1);
1597 bus->cur_read.len = rd_new.len_nxtfrm << 4;
1598
1599 /* Remove superframe header, remember offset */
1600 skb_pull(pfirst, rd_new.dat_offset);
1601 sfdoff = rd_new.dat_offset;
1602 num = 0;
1603
1604 /* Validate all the subframe headers */
1605 skb_queue_walk(&bus->glom, pnext) {
1606 /* leave when invalid subframe is found */
1607 if (errcode)
1608 break;
1609
1610 rd_new.len = pnext->len;
1611 rd_new.seq_num = rxseq++;
1612 sdio_claim_host(bus->sdiodev->func1);
1613 errcode = brcmf_sdio_hdparse(bus, pnext->data, &rd_new,
1614 BRCMF_SDIO_FT_SUB);
1615 sdio_release_host(bus->sdiodev->func1);
1616 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1617 pnext->data, 32, "subframe:\n");
1618
1619 num++;
1620 }
1621
1622 if (errcode) {
1623 /* Terminate frame on error */
1624 sdio_claim_host(bus->sdiodev->func1);
1625 brcmf_sdio_rxfail(bus, true, false);
1626 bus->sdcnt.rxglomfail++;
1627 brcmf_sdio_free_glom(bus);
1628 sdio_release_host(bus->sdiodev->func1);
1629 bus->cur_read.len = 0;
1630 return 0;
1631 }
1632
1633 /* Basic SD framing looks ok - process each packet (header) */
1634
1635 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
1636 dptr = (u8 *) (pfirst->data);
1637 sublen = get_unaligned_le16(dptr);
1638 doff = brcmf_sdio_getdatoffset(&dptr[SDPCM_HWHDR_LEN]);
1639
1640 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1641 dptr, pfirst->len,
1642 "Rx Subframe Data:\n");
1643
1644 __skb_trim(pfirst, sublen);
1645 skb_pull(pfirst, doff);
1646
1647 if (pfirst->len == 0) {
1648 skb_unlink(pfirst, &bus->glom);
1649 brcmu_pkt_buf_free_skb(pfirst);
1650 continue;
1651 }
1652
1653 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1654 pfirst->data,
1655 min_t(int, pfirst->len, 32),
1656 "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1657 bus->glom.qlen, pfirst, pfirst->data,
1658 pfirst->len, pfirst->next,
1659 pfirst->prev);
1660 skb_unlink(pfirst, &bus->glom);
1661 if (brcmf_sdio_fromevntchan(&dptr[SDPCM_HWHDR_LEN]))
1662 brcmf_rx_event(bus->sdiodev->dev, pfirst);
1663 else
1664 brcmf_rx_frame(bus->sdiodev->dev, pfirst,
1665 false);
1666 bus->sdcnt.rxglompkts++;
1667 }
1668
1669 bus->sdcnt.rxglomframes++;
1670 }
1671 return num;
1672 }
1673
1674 static int brcmf_sdio_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
1675 bool *pending)
1676 {
1677 DECLARE_WAITQUEUE(wait, current);
1678 int timeout = DCMD_RESP_TIMEOUT;
1679
1680 /* Wait until control frame is available */
1681 add_wait_queue(&bus->dcmd_resp_wait, &wait);
1682 set_current_state(TASK_INTERRUPTIBLE);
1683
1684 while (!(*condition) && (!signal_pending(current) && timeout))
1685 timeout = schedule_timeout(timeout);
1686
1687 if (signal_pending(current))
1688 *pending = true;
1689
1690 set_current_state(TASK_RUNNING);
1691 remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1692
1693 return timeout;
1694 }
1695
1696 static int brcmf_sdio_dcmd_resp_wake(struct brcmf_sdio *bus)
1697 {
1698 wake_up_interruptible(&bus->dcmd_resp_wait);
1699
1700 return 0;
1701 }
1702 static void
1703 brcmf_sdio_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
1704 {
1705 uint rdlen, pad;
1706 u8 *buf = NULL, *rbuf;
1707 int sdret;
1708
1709 brcmf_dbg(TRACE, "Enter\n");
1710
1711 if (bus->rxblen)
1712 buf = vzalloc(bus->rxblen);
1713 if (!buf)
1714 goto done;
1715
1716 rbuf = bus->rxbuf;
1717 pad = ((unsigned long)rbuf % bus->head_align);
1718 if (pad)
1719 rbuf += (bus->head_align - pad);
1720
1721 /* Copy the already-read portion over */
1722 memcpy(buf, hdr, BRCMF_FIRSTREAD);
1723 if (len <= BRCMF_FIRSTREAD)
1724 goto gotpkt;
1725
1726 /* Raise rdlen to next SDIO block to avoid tail command */
1727 rdlen = len - BRCMF_FIRSTREAD;
1728 if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1729 pad = bus->blocksize - (rdlen % bus->blocksize);
1730 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1731 ((len + pad) < bus->sdiodev->bus_if->maxctl))
1732 rdlen += pad;
1733 } else if (rdlen % bus->head_align) {
1734 rdlen += bus->head_align - (rdlen % bus->head_align);
1735 }
1736
1737 /* Drop if the read is too big or it exceeds our maximum */
1738 if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
1739 brcmf_err("%d-byte control read exceeds %d-byte buffer\n",
1740 rdlen, bus->sdiodev->bus_if->maxctl);
1741 brcmf_sdio_rxfail(bus, false, false);
1742 goto done;
1743 }
1744
1745 if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
1746 brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
1747 len, len - doff, bus->sdiodev->bus_if->maxctl);
1748 bus->sdcnt.rx_toolong++;
1749 brcmf_sdio_rxfail(bus, false, false);
1750 goto done;
1751 }
1752
1753 /* Read remain of frame body */
1754 sdret = brcmf_sdiod_recv_buf(bus->sdiodev, rbuf, rdlen);
1755 bus->sdcnt.f2rxdata++;
1756
1757 /* Control frame failures need retransmission */
1758 if (sdret < 0) {
1759 brcmf_err("read %d control bytes failed: %d\n",
1760 rdlen, sdret);
1761 bus->sdcnt.rxc_errors++;
1762 brcmf_sdio_rxfail(bus, true, true);
1763 goto done;
1764 } else
1765 memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen);
1766
1767 gotpkt:
1768
1769 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
1770 buf, len, "RxCtrl:\n");
1771
1772 /* Point to valid data and indicate its length */
1773 spin_lock_bh(&bus->rxctl_lock);
1774 if (bus->rxctl) {
1775 brcmf_err("last control frame is being processed.\n");
1776 spin_unlock_bh(&bus->rxctl_lock);
1777 vfree(buf);
1778 goto done;
1779 }
1780 bus->rxctl = buf + doff;
1781 bus->rxctl_orig = buf;
1782 bus->rxlen = len - doff;
1783 spin_unlock_bh(&bus->rxctl_lock);
1784
1785 done:
1786 /* Awake any waiters */
1787 brcmf_sdio_dcmd_resp_wake(bus);
1788 }
1789
1790 /* Pad read to blocksize for efficiency */
1791 static void brcmf_sdio_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
1792 {
1793 if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1794 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1795 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1796 *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1797 *rdlen += *pad;
1798 } else if (*rdlen % bus->head_align) {
1799 *rdlen += bus->head_align - (*rdlen % bus->head_align);
1800 }
1801 }
1802
1803 static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
1804 {
1805 struct sk_buff *pkt; /* Packet for event or data frames */
1806 u16 pad; /* Number of pad bytes to read */
1807 uint rxleft = 0; /* Remaining number of frames allowed */
1808 int ret; /* Return code from calls */
1809 uint rxcount = 0; /* Total frames read */
1810 struct brcmf_sdio_hdrinfo *rd = &bus->cur_read, rd_new;
1811 u8 head_read = 0;
1812
1813 brcmf_dbg(TRACE, "Enter\n");
1814
1815 /* Not finished unless we encounter no more frames indication */
1816 bus->rxpending = true;
1817
1818 for (rd->seq_num = bus->rx_seq, rxleft = maxframes;
1819 !bus->rxskip && rxleft && bus->sdiodev->state == BRCMF_SDIOD_DATA;
1820 rd->seq_num++, rxleft--) {
1821
1822 /* Handle glomming separately */
1823 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
1824 u8 cnt;
1825 brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
1826 bus->glomd, skb_peek(&bus->glom));
1827 cnt = brcmf_sdio_rxglom(bus, rd->seq_num);
1828 brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1829 rd->seq_num += cnt - 1;
1830 rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1831 continue;
1832 }
1833
1834 rd->len_left = rd->len;
1835 /* read header first for unknow frame length */
1836 sdio_claim_host(bus->sdiodev->func1);
1837 if (!rd->len) {
1838 ret = brcmf_sdiod_recv_buf(bus->sdiodev,
1839 bus->rxhdr, BRCMF_FIRSTREAD);
1840 bus->sdcnt.f2rxhdrs++;
1841 if (ret < 0) {
1842 brcmf_err("RXHEADER FAILED: %d\n",
1843 ret);
1844 bus->sdcnt.rx_hdrfail++;
1845 brcmf_sdio_rxfail(bus, true, true);
1846 sdio_release_host(bus->sdiodev->func1);
1847 continue;
1848 }
1849
1850 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
1851 bus->rxhdr, SDPCM_HDRLEN,
1852 "RxHdr:\n");
1853
1854 if (brcmf_sdio_hdparse(bus, bus->rxhdr, rd,
1855 BRCMF_SDIO_FT_NORMAL)) {
1856 sdio_release_host(bus->sdiodev->func1);
1857 if (!bus->rxpending)
1858 break;
1859 else
1860 continue;
1861 }
1862
1863 if (rd->channel == SDPCM_CONTROL_CHANNEL) {
1864 brcmf_sdio_read_control(bus, bus->rxhdr,
1865 rd->len,
1866 rd->dat_offset);
1867 /* prepare the descriptor for the next read */
1868 rd->len = rd->len_nxtfrm << 4;
1869 rd->len_nxtfrm = 0;
1870 /* treat all packet as event if we don't know */
1871 rd->channel = SDPCM_EVENT_CHANNEL;
1872 sdio_release_host(bus->sdiodev->func1);
1873 continue;
1874 }
1875 rd->len_left = rd->len > BRCMF_FIRSTREAD ?
1876 rd->len - BRCMF_FIRSTREAD : 0;
1877 head_read = BRCMF_FIRSTREAD;
1878 }
1879
1880 brcmf_sdio_pad(bus, &pad, &rd->len_left);
1881
1882 pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read +
1883 bus->head_align);
1884 if (!pkt) {
1885 /* Give up on data, request rtx of events */
1886 brcmf_err("brcmu_pkt_buf_get_skb failed\n");
1887 brcmf_sdio_rxfail(bus, false,
1888 RETRYCHAN(rd->channel));
1889 sdio_release_host(bus->sdiodev->func1);
1890 continue;
1891 }
1892 skb_pull(pkt, head_read);
1893 pkt_align(pkt, rd->len_left, bus->head_align);
1894
1895 ret = brcmf_sdiod_recv_pkt(bus->sdiodev, pkt);
1896 bus->sdcnt.f2rxdata++;
1897 sdio_release_host(bus->sdiodev->func1);
1898
1899 if (ret < 0) {
1900 brcmf_err("read %d bytes from channel %d failed: %d\n",
1901 rd->len, rd->channel, ret);
1902 brcmu_pkt_buf_free_skb(pkt);
1903 sdio_claim_host(bus->sdiodev->func1);
1904 brcmf_sdio_rxfail(bus, true,
1905 RETRYCHAN(rd->channel));
1906 sdio_release_host(bus->sdiodev->func1);
1907 continue;
1908 }
1909
1910 if (head_read) {
1911 skb_push(pkt, head_read);
1912 memcpy(pkt->data, bus->rxhdr, head_read);
1913 head_read = 0;
1914 } else {
1915 memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
1916 rd_new.seq_num = rd->seq_num;
1917 sdio_claim_host(bus->sdiodev->func1);
1918 if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new,
1919 BRCMF_SDIO_FT_NORMAL)) {
1920 rd->len = 0;
1921 brcmu_pkt_buf_free_skb(pkt);
1922 }
1923 bus->sdcnt.rx_readahead_cnt++;
1924 if (rd->len != roundup(rd_new.len, 16)) {
1925 brcmf_err("frame length mismatch:read %d, should be %d\n",
1926 rd->len,
1927 roundup(rd_new.len, 16) >> 4);
1928 rd->len = 0;
1929 brcmf_sdio_rxfail(bus, true, true);
1930 sdio_release_host(bus->sdiodev->func1);
1931 brcmu_pkt_buf_free_skb(pkt);
1932 continue;
1933 }
1934 sdio_release_host(bus->sdiodev->func1);
1935 rd->len_nxtfrm = rd_new.len_nxtfrm;
1936 rd->channel = rd_new.channel;
1937 rd->dat_offset = rd_new.dat_offset;
1938
1939 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1940 BRCMF_DATA_ON()) &&
1941 BRCMF_HDRS_ON(),
1942 bus->rxhdr, SDPCM_HDRLEN,
1943 "RxHdr:\n");
1944
1945 if (rd_new.channel == SDPCM_CONTROL_CHANNEL) {
1946 brcmf_err("readahead on control packet %d?\n",
1947 rd_new.seq_num);
1948 /* Force retry w/normal header read */
1949 rd->len = 0;
1950 sdio_claim_host(bus->sdiodev->func1);
1951 brcmf_sdio_rxfail(bus, false, true);
1952 sdio_release_host(bus->sdiodev->func1);
1953 brcmu_pkt_buf_free_skb(pkt);
1954 continue;
1955 }
1956 }
1957
1958 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1959 pkt->data, rd->len, "Rx Data:\n");
1960
1961 /* Save superframe descriptor and allocate packet frame */
1962 if (rd->channel == SDPCM_GLOM_CHANNEL) {
1963 if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_HWHDR_LEN])) {
1964 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
1965 rd->len);
1966 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1967 pkt->data, rd->len,
1968 "Glom Data:\n");
1969 __skb_trim(pkt, rd->len);
1970 skb_pull(pkt, SDPCM_HDRLEN);
1971 bus->glomd = pkt;
1972 } else {
1973 brcmf_err("%s: glom superframe w/o "
1974 "descriptor!\n", __func__);
1975 sdio_claim_host(bus->sdiodev->func1);
1976 brcmf_sdio_rxfail(bus, false, false);
1977 sdio_release_host(bus->sdiodev->func1);
1978 }
1979 /* prepare the descriptor for the next read */
1980 rd->len = rd->len_nxtfrm << 4;
1981 rd->len_nxtfrm = 0;
1982 /* treat all packet as event if we don't know */
1983 rd->channel = SDPCM_EVENT_CHANNEL;
1984 continue;
1985 }
1986
1987 /* Fill in packet len and prio, deliver upward */
1988 __skb_trim(pkt, rd->len);
1989 skb_pull(pkt, rd->dat_offset);
1990
1991 if (pkt->len == 0)
1992 brcmu_pkt_buf_free_skb(pkt);
1993 else if (rd->channel == SDPCM_EVENT_CHANNEL)
1994 brcmf_rx_event(bus->sdiodev->dev, pkt);
1995 else
1996 brcmf_rx_frame(bus->sdiodev->dev, pkt,
1997 false);
1998
1999 /* prepare the descriptor for the next read */
2000 rd->len = rd->len_nxtfrm << 4;
2001 rd->len_nxtfrm = 0;
2002 /* treat all packet as event if we don't know */
2003 rd->channel = SDPCM_EVENT_CHANNEL;
2004 }
2005
2006 rxcount = maxframes - rxleft;
2007 /* Message if we hit the limit */
2008 if (!rxleft)
2009 brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes);
2010 else
2011 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
2012 /* Back off rxseq if awaiting rtx, update rx_seq */
2013 if (bus->rxskip)
2014 rd->seq_num--;
2015 bus->rx_seq = rd->seq_num;
2016
2017 return rxcount;
2018 }
2019
2020 static void
2021 brcmf_sdio_wait_event_wakeup(struct brcmf_sdio *bus)
2022 {
2023 wake_up_interruptible(&bus->ctrl_wait);
2024 return;
2025 }
2026
2027 static int brcmf_sdio_txpkt_hdalign(struct brcmf_sdio *bus, struct sk_buff *pkt)
2028 {
2029 struct brcmf_bus_stats *stats;
2030 u16 head_pad;
2031 u8 *dat_buf;
2032
2033 dat_buf = (u8 *)(pkt->data);
2034
2035 /* Check head padding */
2036 head_pad = ((unsigned long)dat_buf % bus->head_align);
2037 if (head_pad) {
2038 if (skb_headroom(pkt) < head_pad) {
2039 stats = &bus->sdiodev->bus_if->stats;
2040 atomic_inc(&stats->pktcowed);
2041 if (skb_cow_head(pkt, head_pad)) {
2042 atomic_inc(&stats->pktcow_failed);
2043 return -ENOMEM;
2044 }
2045 head_pad = 0;
2046 }
2047 skb_push(pkt, head_pad);
2048 dat_buf = (u8 *)(pkt->data);
2049 }
2050 memset(dat_buf, 0, head_pad + bus->tx_hdrlen);
2051 return head_pad;
2052 }
2053
2054 /*
2055 * struct brcmf_skbuff_cb reserves first two bytes in sk_buff::cb for
2056 * bus layer usage.
2057 */
2058 /* flag marking a dummy skb added for DMA alignment requirement */
2059 #define ALIGN_SKB_FLAG 0x8000
2060 /* bit mask of data length chopped from the previous packet */
2061 #define ALIGN_SKB_CHOP_LEN_MASK 0x7fff
2062
2063 static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus,
2064 struct sk_buff_head *pktq,
2065 struct sk_buff *pkt, u16 total_len)
2066 {
2067 struct brcmf_sdio_dev *sdiodev;
2068 struct sk_buff *pkt_pad;
2069 u16 tail_pad, tail_chop, chain_pad;
2070 unsigned int blksize;
2071 bool lastfrm;
2072 int ntail, ret;
2073
2074 sdiodev = bus->sdiodev;
2075 blksize = sdiodev->func2->cur_blksize;
2076 /* sg entry alignment should be a divisor of block size */
2077 WARN_ON(blksize % bus->sgentry_align);
2078
2079 /* Check tail padding */
2080 lastfrm = skb_queue_is_last(pktq, pkt);
2081 tail_pad = 0;
2082 tail_chop = pkt->len % bus->sgentry_align;
2083 if (tail_chop)
2084 tail_pad = bus->sgentry_align - tail_chop;
2085 chain_pad = (total_len + tail_pad) % blksize;
2086 if (lastfrm && chain_pad)
2087 tail_pad += blksize - chain_pad;
2088 if (skb_tailroom(pkt) < tail_pad && pkt->len > blksize) {
2089 pkt_pad = brcmu_pkt_buf_get_skb(tail_pad + tail_chop +
2090 bus->head_align);
2091 if (pkt_pad == NULL)
2092 return -ENOMEM;
2093 ret = brcmf_sdio_txpkt_hdalign(bus, pkt_pad);
2094 if (unlikely(ret < 0)) {
2095 kfree_skb(pkt_pad);
2096 return ret;
2097 }
2098 memcpy(pkt_pad->data,
2099 pkt->data + pkt->len - tail_chop,
2100 tail_chop);
2101 *(u16 *)(pkt_pad->cb) = ALIGN_SKB_FLAG + tail_chop;
2102 skb_trim(pkt, pkt->len - tail_chop);
2103 skb_trim(pkt_pad, tail_pad + tail_chop);
2104 __skb_queue_after(pktq, pkt, pkt_pad);
2105 } else {
2106 ntail = pkt->data_len + tail_pad -
2107 (pkt->end - pkt->tail);
2108 if (skb_cloned(pkt) || ntail > 0)
2109 if (pskb_expand_head(pkt, 0, ntail, GFP_ATOMIC))
2110 return -ENOMEM;
2111 if (skb_linearize(pkt))
2112 return -ENOMEM;
2113 __skb_put(pkt, tail_pad);
2114 }
2115
2116 return tail_pad;
2117 }
2118
2119 /**
2120 * brcmf_sdio_txpkt_prep - packet preparation for transmit
2121 * @bus: brcmf_sdio structure pointer
2122 * @pktq: packet list pointer
2123 * @chan: virtual channel to transmit the packet
2124 *
2125 * Processes to be applied to the packet
2126 * - Align data buffer pointer
2127 * - Align data buffer length
2128 * - Prepare header
2129 * Return: negative value if there is error
2130 */
2131 static int
2132 brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
2133 uint chan)
2134 {
2135 u16 head_pad, total_len;
2136 struct sk_buff *pkt_next;
2137 u8 txseq;
2138 int ret;
2139 struct brcmf_sdio_hdrinfo hd_info = {0};
2140
2141 txseq = bus->tx_seq;
2142 total_len = 0;
2143 skb_queue_walk(pktq, pkt_next) {
2144 /* alignment packet inserted in previous
2145 * loop cycle can be skipped as it is
2146 * already properly aligned and does not
2147 * need an sdpcm header.
2148 */
2149 if (*(u16 *)(pkt_next->cb) & ALIGN_SKB_FLAG)
2150 continue;
2151
2152 /* align packet data pointer */
2153 ret = brcmf_sdio_txpkt_hdalign(bus, pkt_next);
2154 if (ret < 0)
2155 return ret;
2156 head_pad = (u16)ret;
2157 if (head_pad)
2158 memset(pkt_next->data + bus->tx_hdrlen, 0, head_pad);
2159
2160 total_len += pkt_next->len;
2161
2162 hd_info.len = pkt_next->len;
2163 hd_info.lastfrm = skb_queue_is_last(pktq, pkt_next);
2164 if (bus->txglom && pktq->qlen > 1) {
2165 ret = brcmf_sdio_txpkt_prep_sg(bus, pktq,
2166 pkt_next, total_len);
2167 if (ret < 0)
2168 return ret;
2169 hd_info.tail_pad = (u16)ret;
2170 total_len += (u16)ret;
2171 }
2172
2173 hd_info.channel = chan;
2174 hd_info.dat_offset = head_pad + bus->tx_hdrlen;
2175 hd_info.seq_num = txseq++;
2176
2177 /* Now fill the header */
2178 brcmf_sdio_hdpack(bus, pkt_next->data, &hd_info);
2179
2180 if (BRCMF_BYTES_ON() &&
2181 ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
2182 (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)))
2183 brcmf_dbg_hex_dump(true, pkt_next->data, hd_info.len,
2184 "Tx Frame:\n");
2185 else if (BRCMF_HDRS_ON())
2186 brcmf_dbg_hex_dump(true, pkt_next->data,
2187 head_pad + bus->tx_hdrlen,
2188 "Tx Header:\n");
2189 }
2190 /* Hardware length tag of the first packet should be total
2191 * length of the chain (including padding)
2192 */
2193 if (bus->txglom)
2194 brcmf_sdio_update_hwhdr(pktq->next->data, total_len);
2195 return 0;
2196 }
2197
2198 /**
2199 * brcmf_sdio_txpkt_postp - packet post processing for transmit
2200 * @bus: brcmf_sdio structure pointer
2201 * @pktq: packet list pointer
2202 *
2203 * Processes to be applied to the packet
2204 * - Remove head padding
2205 * - Remove tail padding
2206 */
2207 static void
2208 brcmf_sdio_txpkt_postp(struct brcmf_sdio *bus, struct sk_buff_head *pktq)
2209 {
2210 u8 *hdr;
2211 u32 dat_offset;
2212 u16 tail_pad;
2213 u16 dummy_flags, chop_len;
2214 struct sk_buff *pkt_next, *tmp, *pkt_prev;
2215
2216 skb_queue_walk_safe(pktq, pkt_next, tmp) {
2217 dummy_flags = *(u16 *)(pkt_next->cb);
2218 if (dummy_flags & ALIGN_SKB_FLAG) {
2219 chop_len = dummy_flags & ALIGN_SKB_CHOP_LEN_MASK;
2220 if (chop_len) {
2221 pkt_prev = pkt_next->prev;
2222 skb_put(pkt_prev, chop_len);
2223 }
2224 __skb_unlink(pkt_next, pktq);
2225 brcmu_pkt_buf_free_skb(pkt_next);
2226 } else {
2227 hdr = pkt_next->data + bus->tx_hdrlen - SDPCM_SWHDR_LEN;
2228 dat_offset = le32_to_cpu(*(__le32 *)hdr);
2229 dat_offset = (dat_offset & SDPCM_DOFFSET_MASK) >>
2230 SDPCM_DOFFSET_SHIFT;
2231 skb_pull(pkt_next, dat_offset);
2232 if (bus->txglom) {
2233 tail_pad = le16_to_cpu(*(__le16 *)(hdr - 2));
2234 skb_trim(pkt_next, pkt_next->len - tail_pad);
2235 }
2236 }
2237 }
2238 }
2239
2240 /* Writes a HW/SW header into the packet and sends it. */
2241 /* Assumes: (a) header space already there, (b) caller holds lock */
2242 static int brcmf_sdio_txpkt(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
2243 uint chan)
2244 {
2245 int ret;
2246 struct sk_buff *pkt_next, *tmp;
2247
2248 brcmf_dbg(TRACE, "Enter\n");
2249
2250 ret = brcmf_sdio_txpkt_prep(bus, pktq, chan);
2251 if (ret)
2252 goto done;
2253
2254 sdio_claim_host(bus->sdiodev->func1);
2255 ret = brcmf_sdiod_send_pkt(bus->sdiodev, pktq);
2256 bus->sdcnt.f2txdata++;
2257
2258 if (ret < 0)
2259 brcmf_sdio_txfail(bus);
2260
2261 sdio_release_host(bus->sdiodev->func1);
2262
2263 done:
2264 brcmf_sdio_txpkt_postp(bus, pktq);
2265 if (ret == 0)
2266 bus->tx_seq = (bus->tx_seq + pktq->qlen) % SDPCM_SEQ_WRAP;
2267 skb_queue_walk_safe(pktq, pkt_next, tmp) {
2268 __skb_unlink(pkt_next, pktq);
2269 brcmf_proto_bcdc_txcomplete(bus->sdiodev->dev, pkt_next,
2270 ret == 0);
2271 }
2272 return ret;
2273 }
2274
2275 static uint brcmf_sdio_sendfromq(struct brcmf_sdio *bus, uint maxframes)
2276 {
2277 struct sk_buff *pkt;
2278 struct sk_buff_head pktq;
2279 u32 intstat_addr = bus->sdio_core->base + SD_REG(intstatus);
2280 u32 intstatus = 0;
2281 int ret = 0, prec_out, i;
2282 uint cnt = 0;
2283 u8 tx_prec_map, pkt_num;
2284
2285 brcmf_dbg(TRACE, "Enter\n");
2286
2287 tx_prec_map = ~bus->flowcontrol;
2288
2289 /* Send frames until the limit or some other event */
2290 for (cnt = 0; (cnt < maxframes) && data_ok(bus);) {
2291 pkt_num = 1;
2292 if (bus->txglom)
2293 pkt_num = min_t(u8, bus->tx_max - bus->tx_seq,
2294 bus->sdiodev->txglomsz);
2295 pkt_num = min_t(u32, pkt_num,
2296 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol));
2297 __skb_queue_head_init(&pktq);
2298 spin_lock_bh(&bus->txq_lock);
2299 for (i = 0; i < pkt_num; i++) {
2300 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map,
2301 &prec_out);
2302 if (pkt == NULL)
2303 break;
2304 __skb_queue_tail(&pktq, pkt);
2305 }
2306 spin_unlock_bh(&bus->txq_lock);
2307 if (i == 0)
2308 break;
2309
2310 ret = brcmf_sdio_txpkt(bus, &pktq, SDPCM_DATA_CHANNEL);
2311
2312 cnt += i;
2313
2314 /* In poll mode, need to check for other events */
2315 if (!bus->intr) {
2316 /* Check device status, signal pending interrupt */
2317 sdio_claim_host(bus->sdiodev->func1);
2318 intstatus = brcmf_sdiod_readl(bus->sdiodev,
2319 intstat_addr, &ret);
2320 sdio_release_host(bus->sdiodev->func1);
2321
2322 bus->sdcnt.f2txdata++;
2323 if (ret != 0)
2324 break;
2325 if (intstatus & bus->hostintmask)
2326 atomic_set(&bus->ipend, 1);
2327 }
2328 }
2329
2330 /* Deflow-control stack if needed */
2331 if ((bus->sdiodev->state == BRCMF_SDIOD_DATA) &&
2332 bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
2333 bus->txoff = false;
2334 brcmf_proto_bcdc_txflowblock(bus->sdiodev->dev, false);
2335 }
2336
2337 return cnt;
2338 }
2339
2340 static int brcmf_sdio_tx_ctrlframe(struct brcmf_sdio *bus, u8 *frame, u16 len)
2341 {
2342 u8 doff;
2343 u16 pad;
2344 uint retries = 0;
2345 struct brcmf_sdio_hdrinfo hd_info = {0};
2346 int ret;
2347
2348 brcmf_dbg(TRACE, "Enter\n");
2349
2350 /* Back the pointer to make room for bus header */
2351 frame -= bus->tx_hdrlen;
2352 len += bus->tx_hdrlen;
2353
2354 /* Add alignment padding (optional for ctl frames) */
2355 doff = ((unsigned long)frame % bus->head_align);
2356 if (doff) {
2357 frame -= doff;
2358 len += doff;
2359 memset(frame + bus->tx_hdrlen, 0, doff);
2360 }
2361
2362 /* Round send length to next SDIO block */
2363 pad = 0;
2364 if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2365 pad = bus->blocksize - (len % bus->blocksize);
2366 if ((pad > bus->roundup) || (pad >= bus->blocksize))
2367 pad = 0;
2368 } else if (len % bus->head_align) {
2369 pad = bus->head_align - (len % bus->head_align);
2370 }
2371 len += pad;
2372
2373 hd_info.len = len - pad;
2374 hd_info.channel = SDPCM_CONTROL_CHANNEL;
2375 hd_info.dat_offset = doff + bus->tx_hdrlen;
2376 hd_info.seq_num = bus->tx_seq;
2377 hd_info.lastfrm = true;
2378 hd_info.tail_pad = pad;
2379 brcmf_sdio_hdpack(bus, frame, &hd_info);
2380
2381 if (bus->txglom)
2382 brcmf_sdio_update_hwhdr(frame, len);
2383
2384 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
2385 frame, len, "Tx Frame:\n");
2386 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
2387 BRCMF_HDRS_ON(),
2388 frame, min_t(u16, len, 16), "TxHdr:\n");
2389
2390 do {
2391 ret = brcmf_sdiod_send_buf(bus->sdiodev, frame, len);
2392
2393 if (ret < 0)
2394 brcmf_sdio_txfail(bus);
2395 else
2396 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
2397 } while (ret < 0 && retries++ < TXRETRIES);
2398
2399 return ret;
2400 }
2401
2402 static void brcmf_sdio_bus_stop(struct device *dev)
2403 {
2404 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2405 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2406 struct brcmf_sdio *bus = sdiodev->bus;
2407 struct brcmf_core *core = bus->sdio_core;
2408 u32 local_hostintmask;
2409 u8 saveclk;
2410 int err;
2411
2412 brcmf_dbg(TRACE, "Enter\n");
2413
2414 if (bus->watchdog_tsk) {
2415 send_sig(SIGTERM, bus->watchdog_tsk, 1);
2416 kthread_stop(bus->watchdog_tsk);
2417 bus->watchdog_tsk = NULL;
2418 }
2419
2420 if (sdiodev->state != BRCMF_SDIOD_NOMEDIUM) {
2421 sdio_claim_host(sdiodev->func1);
2422
2423 /* Enable clock for device interrupts */
2424 brcmf_sdio_bus_sleep(bus, false, false);
2425
2426 /* Disable and clear interrupts at the chip level also */
2427 brcmf_sdiod_writel(sdiodev, core->base + SD_REG(hostintmask),
2428 0, NULL);
2429
2430 local_hostintmask = bus->hostintmask;
2431 bus->hostintmask = 0;
2432
2433 /* Force backplane clocks to assure F2 interrupt propagates */
2434 saveclk = brcmf_sdiod_readb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2435 &err);
2436 if (!err)
2437 brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2438 (saveclk | SBSDIO_FORCE_HT), &err);
2439 if (err)
2440 brcmf_err("Failed to force clock for F2: err %d\n",
2441 err);
2442
2443 /* Turn off the bus (F2), free any pending packets */
2444 brcmf_dbg(INTR, "disable SDIO interrupts\n");
2445 sdio_disable_func(sdiodev->func2);
2446
2447 /* Clear any pending interrupts now that F2 is disabled */
2448 brcmf_sdiod_writel(sdiodev, core->base + SD_REG(intstatus),
2449 local_hostintmask, NULL);
2450
2451 sdio_release_host(sdiodev->func1);
2452 }
2453 /* Clear the data packet queues */
2454 brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
2455
2456 /* Clear any held glomming stuff */
2457 brcmu_pkt_buf_free_skb(bus->glomd);
2458 brcmf_sdio_free_glom(bus);
2459
2460 /* Clear rx control and wake any waiters */
2461 spin_lock_bh(&bus->rxctl_lock);
2462 bus->rxlen = 0;
2463 spin_unlock_bh(&bus->rxctl_lock);
2464 brcmf_sdio_dcmd_resp_wake(bus);
2465
2466 /* Reset some F2 state stuff */
2467 bus->rxskip = false;
2468 bus->tx_seq = bus->rx_seq = 0;
2469 }
2470
2471 static inline void brcmf_sdio_clrintr(struct brcmf_sdio *bus)
2472 {
2473 struct brcmf_sdio_dev *sdiodev;
2474 unsigned long flags;
2475
2476 sdiodev = bus->sdiodev;
2477 if (sdiodev->oob_irq_requested) {
2478 spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
2479 if (!sdiodev->irq_en && !atomic_read(&bus->ipend)) {
2480 enable_irq(sdiodev->settings->bus.sdio.oob_irq_nr);
2481 sdiodev->irq_en = true;
2482 }
2483 spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
2484 }
2485 }
2486
2487 static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus)
2488 {
2489 struct brcmf_core *core = bus->sdio_core;
2490 u32 addr;
2491 unsigned long val;
2492 int ret;
2493
2494 addr = core->base + SD_REG(intstatus);
2495
2496 val = brcmf_sdiod_readl(bus->sdiodev, addr, &ret);
2497 bus->sdcnt.f1regdata++;
2498 if (ret != 0)
2499 return ret;
2500
2501 val &= bus->hostintmask;
2502 atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE));
2503
2504 /* Clear interrupts */
2505 if (val) {
2506 brcmf_sdiod_writel(bus->sdiodev, addr, val, &ret);
2507 bus->sdcnt.f1regdata++;
2508 atomic_or(val, &bus->intstatus);
2509 }
2510
2511 return ret;
2512 }
2513
2514 static void brcmf_sdio_dpc(struct brcmf_sdio *bus)
2515 {
2516 struct brcmf_sdio_dev *sdiod = bus->sdiodev;
2517 u32 newstatus = 0;
2518 u32 intstat_addr = bus->sdio_core->base + SD_REG(intstatus);
2519 unsigned long intstatus;
2520 uint txlimit = bus->txbound; /* Tx frames to send before resched */
2521 uint framecnt; /* Temporary counter of tx/rx frames */
2522 int err = 0;
2523
2524 brcmf_dbg(TRACE, "Enter\n");
2525
2526 sdio_claim_host(bus->sdiodev->func1);
2527
2528 /* If waiting for HTAVAIL, check status */
2529 if (!bus->sr_enabled && bus->clkstate == CLK_PENDING) {
2530 u8 clkctl, devctl = 0;
2531
2532 #ifdef DEBUG
2533 /* Check for inconsistent device control */
2534 devctl = brcmf_sdiod_readb(bus->sdiodev, SBSDIO_DEVICE_CTL,
2535 &err);
2536 #endif /* DEBUG */
2537
2538 /* Read CSR, if clock on switch to AVAIL, else ignore */
2539 clkctl = brcmf_sdiod_readb(bus->sdiodev,
2540 SBSDIO_FUNC1_CHIPCLKCSR, &err);
2541
2542 brcmf_dbg(SDIO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2543 devctl, clkctl);
2544
2545 if (SBSDIO_HTAV(clkctl)) {
2546 devctl = brcmf_sdiod_readb(bus->sdiodev,
2547 SBSDIO_DEVICE_CTL, &err);
2548 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
2549 brcmf_sdiod_writeb(bus->sdiodev,
2550 SBSDIO_DEVICE_CTL, devctl, &err);
2551 bus->clkstate = CLK_AVAIL;
2552 }
2553 }
2554
2555 /* Make sure backplane clock is on */
2556 brcmf_sdio_bus_sleep(bus, false, true);
2557
2558 /* Pending interrupt indicates new device status */
2559 if (atomic_read(&bus->ipend) > 0) {
2560 atomic_set(&bus->ipend, 0);
2561 err = brcmf_sdio_intr_rstatus(bus);
2562 }
2563
2564 /* Start with leftover status bits */
2565 intstatus = atomic_xchg(&bus->intstatus, 0);
2566
2567 /* Handle flow-control change: read new state in case our ack
2568 * crossed another change interrupt. If change still set, assume
2569 * FC ON for safety, let next loop through do the debounce.
2570 */
2571 if (intstatus & I_HMB_FC_CHANGE) {
2572 intstatus &= ~I_HMB_FC_CHANGE;
2573 brcmf_sdiod_writel(sdiod, intstat_addr, I_HMB_FC_CHANGE, &err);
2574
2575 newstatus = brcmf_sdiod_readl(sdiod, intstat_addr, &err);
2576
2577 bus->sdcnt.f1regdata += 2;
2578 atomic_set(&bus->fcstate,
2579 !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)));
2580 intstatus |= (newstatus & bus->hostintmask);
2581 }
2582
2583 /* Handle host mailbox indication */
2584 if (intstatus & I_HMB_HOST_INT) {
2585 intstatus &= ~I_HMB_HOST_INT;
2586 intstatus |= brcmf_sdio_hostmail(bus);
2587 }
2588
2589 sdio_release_host(bus->sdiodev->func1);
2590
2591 /* Generally don't ask for these, can get CRC errors... */
2592 if (intstatus & I_WR_OOSYNC) {
2593 brcmf_err("Dongle reports WR_OOSYNC\n");
2594 intstatus &= ~I_WR_OOSYNC;
2595 }
2596
2597 if (intstatus & I_RD_OOSYNC) {
2598 brcmf_err("Dongle reports RD_OOSYNC\n");
2599 intstatus &= ~I_RD_OOSYNC;
2600 }
2601
2602 if (intstatus & I_SBINT) {
2603 brcmf_err("Dongle reports SBINT\n");
2604 intstatus &= ~I_SBINT;
2605 }
2606
2607 /* Would be active due to wake-wlan in gSPI */
2608 if (intstatus & I_CHIPACTIVE) {
2609 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2610 intstatus &= ~I_CHIPACTIVE;
2611 }
2612
2613 /* Ignore frame indications if rxskip is set */
2614 if (bus->rxskip)
2615 intstatus &= ~I_HMB_FRAME_IND;
2616
2617 /* On frame indication, read available frames */
2618 if ((intstatus & I_HMB_FRAME_IND) && (bus->clkstate == CLK_AVAIL)) {
2619 brcmf_sdio_readframes(bus, bus->rxbound);
2620 if (!bus->rxpending)
2621 intstatus &= ~I_HMB_FRAME_IND;
2622 }
2623
2624 /* Keep still-pending events for next scheduling */
2625 if (intstatus)
2626 atomic_or(intstatus, &bus->intstatus);
2627
2628 brcmf_sdio_clrintr(bus);
2629
2630 if (bus->ctrl_frame_stat && (bus->clkstate == CLK_AVAIL) &&
2631 data_ok(bus)) {
2632 sdio_claim_host(bus->sdiodev->func1);
2633 if (bus->ctrl_frame_stat) {
2634 err = brcmf_sdio_tx_ctrlframe(bus, bus->ctrl_frame_buf,
2635 bus->ctrl_frame_len);
2636 bus->ctrl_frame_err = err;
2637 wmb();
2638 bus->ctrl_frame_stat = false;
2639 }
2640 sdio_release_host(bus->sdiodev->func1);
2641 brcmf_sdio_wait_event_wakeup(bus);
2642 }
2643 /* Send queued frames (limit 1 if rx may still be pending) */
2644 if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
2645 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit &&
2646 data_ok(bus)) {
2647 framecnt = bus->rxpending ? min(txlimit, bus->txminmax) :
2648 txlimit;
2649 brcmf_sdio_sendfromq(bus, framecnt);
2650 }
2651
2652 if ((bus->sdiodev->state != BRCMF_SDIOD_DATA) || (err != 0)) {
2653 brcmf_err("failed backplane access over SDIO, halting operation\n");
2654 atomic_set(&bus->intstatus, 0);
2655 if (bus->ctrl_frame_stat) {
2656 sdio_claim_host(bus->sdiodev->func1);
2657 if (bus->ctrl_frame_stat) {
2658 bus->ctrl_frame_err = -ENODEV;
2659 wmb();
2660 bus->ctrl_frame_stat = false;
2661 brcmf_sdio_wait_event_wakeup(bus);
2662 }
2663 sdio_release_host(bus->sdiodev->func1);
2664 }
2665 } else if (atomic_read(&bus->intstatus) ||
2666 atomic_read(&bus->ipend) > 0 ||
2667 (!atomic_read(&bus->fcstate) &&
2668 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
2669 data_ok(bus))) {
2670 bus->dpc_triggered = true;
2671 }
2672 }
2673
2674 static struct pktq *brcmf_sdio_bus_gettxq(struct device *dev)
2675 {
2676 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2677 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2678 struct brcmf_sdio *bus = sdiodev->bus;
2679
2680 return &bus->txq;
2681 }
2682
2683 static bool brcmf_sdio_prec_enq(struct pktq *q, struct sk_buff *pkt, int prec)
2684 {
2685 struct sk_buff *p;
2686 int eprec = -1; /* precedence to evict from */
2687
2688 /* Fast case, precedence queue is not full and we are also not
2689 * exceeding total queue length
2690 */
2691 if (!pktq_pfull(q, prec) && !pktq_full(q)) {
2692 brcmu_pktq_penq(q, prec, pkt);
2693 return true;
2694 }
2695
2696 /* Determine precedence from which to evict packet, if any */
2697 if (pktq_pfull(q, prec)) {
2698 eprec = prec;
2699 } else if (pktq_full(q)) {
2700 p = brcmu_pktq_peek_tail(q, &eprec);
2701 if (eprec > prec)
2702 return false;
2703 }
2704
2705 /* Evict if needed */
2706 if (eprec >= 0) {
2707 /* Detect queueing to unconfigured precedence */
2708 if (eprec == prec)
2709 return false; /* refuse newer (incoming) packet */
2710 /* Evict packet according to discard policy */
2711 p = brcmu_pktq_pdeq_tail(q, eprec);
2712 if (p == NULL)
2713 brcmf_err("brcmu_pktq_pdeq_tail() failed\n");
2714 brcmu_pkt_buf_free_skb(p);
2715 }
2716
2717 /* Enqueue */
2718 p = brcmu_pktq_penq(q, prec, pkt);
2719 if (p == NULL)
2720 brcmf_err("brcmu_pktq_penq() failed\n");
2721
2722 return p != NULL;
2723 }
2724
2725 static int brcmf_sdio_bus_txdata(struct device *dev, struct sk_buff *pkt)
2726 {
2727 int ret = -EBADE;
2728 uint prec;
2729 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2730 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2731 struct brcmf_sdio *bus = sdiodev->bus;
2732
2733 brcmf_dbg(TRACE, "Enter: pkt: data %p len %d\n", pkt->data, pkt->len);
2734 if (sdiodev->state != BRCMF_SDIOD_DATA)
2735 return -EIO;
2736
2737 /* Add space for the header */
2738 skb_push(pkt, bus->tx_hdrlen);
2739 /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2740
2741 prec = prio2prec((pkt->priority & PRIOMASK));
2742
2743 /* Check for existing queue, current flow-control,
2744 pending event, or pending clock */
2745 brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
2746 bus->sdcnt.fcqueued++;
2747
2748 /* Priority based enq */
2749 spin_lock_bh(&bus->txq_lock);
2750 /* reset bus_flags in packet cb */
2751 *(u16 *)(pkt->cb) = 0;
2752 if (!brcmf_sdio_prec_enq(&bus->txq, pkt, prec)) {
2753 skb_pull(pkt, bus->tx_hdrlen);
2754 brcmf_err("out of bus->txq !!!\n");
2755 ret = -ENOSR;
2756 } else {
2757 ret = 0;
2758 }
2759
2760 if (pktq_len(&bus->txq) >= TXHI) {
2761 bus->txoff = true;
2762 brcmf_proto_bcdc_txflowblock(dev, true);
2763 }
2764 spin_unlock_bh(&bus->txq_lock);
2765
2766 #ifdef DEBUG
2767 if (pktq_plen(&bus->txq, prec) > qcount[prec])
2768 qcount[prec] = pktq_plen(&bus->txq, prec);
2769 #endif
2770
2771 brcmf_sdio_trigger_dpc(bus);
2772 return ret;
2773 }
2774
2775 #ifdef DEBUG
2776 #define CONSOLE_LINE_MAX 192
2777
2778 static int brcmf_sdio_readconsole(struct brcmf_sdio *bus)
2779 {
2780 struct brcmf_console *c = &bus->console;
2781 u8 line[CONSOLE_LINE_MAX], ch;
2782 u32 n, idx, addr;
2783 int rv;
2784
2785 /* Don't do anything until FWREADY updates console address */
2786 if (bus->console_addr == 0)
2787 return 0;
2788
2789 /* Read console log struct */
2790 addr = bus->console_addr + offsetof(struct rte_console, log_le);
2791 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&c->log_le,
2792 sizeof(c->log_le));
2793 if (rv < 0)
2794 return rv;
2795
2796 /* Allocate console buffer (one time only) */
2797 if (c->buf == NULL) {
2798 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2799 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2800 if (c->buf == NULL)
2801 return -ENOMEM;
2802 }
2803
2804 idx = le32_to_cpu(c->log_le.idx);
2805
2806 /* Protect against corrupt value */
2807 if (idx > c->bufsize)
2808 return -EBADE;
2809
2810 /* Skip reading the console buffer if the index pointer
2811 has not moved */
2812 if (idx == c->last)
2813 return 0;
2814
2815 /* Read the console buffer */
2816 addr = le32_to_cpu(c->log_le.buf);
2817 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, c->buf, c->bufsize);
2818 if (rv < 0)
2819 return rv;
2820
2821 while (c->last != idx) {
2822 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2823 if (c->last == idx) {
2824 /* This would output a partial line.
2825 * Instead, back up
2826 * the buffer pointer and output this
2827 * line next time around.
2828 */
2829 if (c->last >= n)
2830 c->last -= n;
2831 else
2832 c->last = c->bufsize - n;
2833 goto break2;
2834 }
2835 ch = c->buf[c->last];
2836 c->last = (c->last + 1) % c->bufsize;
2837 if (ch == '\n')
2838 break;
2839 line[n] = ch;
2840 }
2841
2842 if (n > 0) {
2843 if (line[n - 1] == '\r')
2844 n--;
2845 line[n] = 0;
2846 pr_debug("CONSOLE: %s\n", line);
2847 }
2848 }
2849 break2:
2850
2851 return 0;
2852 }
2853 #endif /* DEBUG */
2854
2855 static int
2856 brcmf_sdio_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
2857 {
2858 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2859 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2860 struct brcmf_sdio *bus = sdiodev->bus;
2861 int ret;
2862
2863 brcmf_dbg(TRACE, "Enter\n");
2864 if (sdiodev->state != BRCMF_SDIOD_DATA)
2865 return -EIO;
2866
2867 /* Send from dpc */
2868 bus->ctrl_frame_buf = msg;
2869 bus->ctrl_frame_len = msglen;
2870 wmb();
2871 bus->ctrl_frame_stat = true;
2872
2873 brcmf_sdio_trigger_dpc(bus);
2874 wait_event_interruptible_timeout(bus->ctrl_wait, !bus->ctrl_frame_stat,
2875 CTL_DONE_TIMEOUT);
2876 ret = 0;
2877 if (bus->ctrl_frame_stat) {
2878 sdio_claim_host(bus->sdiodev->func1);
2879 if (bus->ctrl_frame_stat) {
2880 brcmf_dbg(SDIO, "ctrl_frame timeout\n");
2881 bus->ctrl_frame_stat = false;
2882 ret = -ETIMEDOUT;
2883 }
2884 sdio_release_host(bus->sdiodev->func1);
2885 }
2886 if (!ret) {
2887 brcmf_dbg(SDIO, "ctrl_frame complete, err=%d\n",
2888 bus->ctrl_frame_err);
2889 rmb();
2890 ret = bus->ctrl_frame_err;
2891 }
2892
2893 if (ret)
2894 bus->sdcnt.tx_ctlerrs++;
2895 else
2896 bus->sdcnt.tx_ctlpkts++;
2897
2898 return ret;
2899 }
2900
2901 #ifdef DEBUG
2902 static int brcmf_sdio_dump_console(struct seq_file *seq, struct brcmf_sdio *bus,
2903 struct sdpcm_shared *sh)
2904 {
2905 u32 addr, console_ptr, console_size, console_index;
2906 char *conbuf = NULL;
2907 __le32 sh_val;
2908 int rv;
2909
2910 /* obtain console information from device memory */
2911 addr = sh->console_addr + offsetof(struct rte_console, log_le);
2912 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2913 (u8 *)&sh_val, sizeof(u32));
2914 if (rv < 0)
2915 return rv;
2916 console_ptr = le32_to_cpu(sh_val);
2917
2918 addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
2919 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2920 (u8 *)&sh_val, sizeof(u32));
2921 if (rv < 0)
2922 return rv;
2923 console_size = le32_to_cpu(sh_val);
2924
2925 addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
2926 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2927 (u8 *)&sh_val, sizeof(u32));
2928 if (rv < 0)
2929 return rv;
2930 console_index = le32_to_cpu(sh_val);
2931
2932 /* allocate buffer for console data */
2933 if (console_size <= CONSOLE_BUFFER_MAX)
2934 conbuf = vzalloc(console_size+1);
2935
2936 if (!conbuf)
2937 return -ENOMEM;
2938
2939 /* obtain the console data from device */
2940 conbuf[console_size] = '\0';
2941 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, console_ptr, (u8 *)conbuf,
2942 console_size);
2943 if (rv < 0)
2944 goto done;
2945
2946 rv = seq_write(seq, conbuf + console_index,
2947 console_size - console_index);
2948 if (rv < 0)
2949 goto done;
2950
2951 if (console_index > 0)
2952 rv = seq_write(seq, conbuf, console_index - 1);
2953
2954 done:
2955 vfree(conbuf);
2956 return rv;
2957 }
2958
2959 static int brcmf_sdio_trap_info(struct seq_file *seq, struct brcmf_sdio *bus,
2960 struct sdpcm_shared *sh)
2961 {
2962 int error;
2963 struct brcmf_trap_info tr;
2964
2965 if ((sh->flags & SDPCM_SHARED_TRAP) == 0) {
2966 brcmf_dbg(INFO, "no trap in firmware\n");
2967 return 0;
2968 }
2969
2970 error = brcmf_sdiod_ramrw(bus->sdiodev, false, sh->trap_addr, (u8 *)&tr,
2971 sizeof(struct brcmf_trap_info));
2972 if (error < 0)
2973 return error;
2974
2975 seq_printf(seq,
2976 "dongle trap info: type 0x%x @ epc 0x%08x\n"
2977 " cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
2978 " lr 0x%08x pc 0x%08x offset 0x%x\n"
2979 " r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n"
2980 " r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n",
2981 le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
2982 le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
2983 le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
2984 le32_to_cpu(tr.pc), sh->trap_addr,
2985 le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
2986 le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
2987 le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
2988 le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));
2989
2990 return 0;
2991 }
2992
2993 static int brcmf_sdio_assert_info(struct seq_file *seq, struct brcmf_sdio *bus,
2994 struct sdpcm_shared *sh)
2995 {
2996 int error = 0;
2997 char file[80] = "?";
2998 char expr[80] = "<???>";
2999
3000 if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
3001 brcmf_dbg(INFO, "firmware not built with -assert\n");
3002 return 0;
3003 } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
3004 brcmf_dbg(INFO, "no assert in dongle\n");
3005 return 0;
3006 }
3007
3008 sdio_claim_host(bus->sdiodev->func1);
3009 if (sh->assert_file_addr != 0) {
3010 error = brcmf_sdiod_ramrw(bus->sdiodev, false,
3011 sh->assert_file_addr, (u8 *)file, 80);
3012 if (error < 0)
3013 return error;
3014 }
3015 if (sh->assert_exp_addr != 0) {
3016 error = brcmf_sdiod_ramrw(bus->sdiodev, false,
3017 sh->assert_exp_addr, (u8 *)expr, 80);
3018 if (error < 0)
3019 return error;
3020 }
3021 sdio_release_host(bus->sdiodev->func1);
3022
3023 seq_printf(seq, "dongle assert: %s:%d: assert(%s)\n",
3024 file, sh->assert_line, expr);
3025 return 0;
3026 }
3027
3028 static int brcmf_sdio_checkdied(struct brcmf_sdio *bus)
3029 {
3030 int error;
3031 struct sdpcm_shared sh;
3032
3033 error = brcmf_sdio_readshared(bus, &sh);
3034
3035 if (error < 0)
3036 return error;
3037
3038 if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
3039 brcmf_dbg(INFO, "firmware not built with -assert\n");
3040 else if (sh.flags & SDPCM_SHARED_ASSERT)
3041 brcmf_err("assertion in dongle\n");
3042
3043 if (sh.flags & SDPCM_SHARED_TRAP)
3044 brcmf_err("firmware trap in dongle\n");
3045
3046 return 0;
3047 }
3048
3049 static int brcmf_sdio_died_dump(struct seq_file *seq, struct brcmf_sdio *bus)
3050 {
3051 int error = 0;
3052 struct sdpcm_shared sh;
3053
3054 error = brcmf_sdio_readshared(bus, &sh);
3055 if (error < 0)
3056 goto done;
3057
3058 error = brcmf_sdio_assert_info(seq, bus, &sh);
3059 if (error < 0)
3060 goto done;
3061
3062 error = brcmf_sdio_trap_info(seq, bus, &sh);
3063 if (error < 0)
3064 goto done;
3065
3066 error = brcmf_sdio_dump_console(seq, bus, &sh);
3067
3068 done:
3069 return error;
3070 }
3071
3072 static int brcmf_sdio_forensic_read(struct seq_file *seq, void *data)
3073 {
3074 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
3075 struct brcmf_sdio *bus = bus_if->bus_priv.sdio->bus;
3076
3077 return brcmf_sdio_died_dump(seq, bus);
3078 }
3079
3080 static int brcmf_debugfs_sdio_count_read(struct seq_file *seq, void *data)
3081 {
3082 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
3083 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3084 struct brcmf_sdio_count *sdcnt = &sdiodev->bus->sdcnt;
3085
3086 seq_printf(seq,
3087 "intrcount: %u\nlastintrs: %u\n"
3088 "pollcnt: %u\nregfails: %u\n"
3089 "tx_sderrs: %u\nfcqueued: %u\n"
3090 "rxrtx: %u\nrx_toolong: %u\n"
3091 "rxc_errors: %u\nrx_hdrfail: %u\n"
3092 "rx_badhdr: %u\nrx_badseq: %u\n"
3093 "fc_rcvd: %u\nfc_xoff: %u\n"
3094 "fc_xon: %u\nrxglomfail: %u\n"
3095 "rxglomframes: %u\nrxglompkts: %u\n"
3096 "f2rxhdrs: %u\nf2rxdata: %u\n"
3097 "f2txdata: %u\nf1regdata: %u\n"
3098 "tickcnt: %u\ntx_ctlerrs: %lu\n"
3099 "tx_ctlpkts: %lu\nrx_ctlerrs: %lu\n"
3100 "rx_ctlpkts: %lu\nrx_readahead: %lu\n",
3101 sdcnt->intrcount, sdcnt->lastintrs,
3102 sdcnt->pollcnt, sdcnt->regfails,
3103 sdcnt->tx_sderrs, sdcnt->fcqueued,
3104 sdcnt->rxrtx, sdcnt->rx_toolong,
3105 sdcnt->rxc_errors, sdcnt->rx_hdrfail,
3106 sdcnt->rx_badhdr, sdcnt->rx_badseq,
3107 sdcnt->fc_rcvd, sdcnt->fc_xoff,
3108 sdcnt->fc_xon, sdcnt->rxglomfail,
3109 sdcnt->rxglomframes, sdcnt->rxglompkts,
3110 sdcnt->f2rxhdrs, sdcnt->f2rxdata,
3111 sdcnt->f2txdata, sdcnt->f1regdata,
3112 sdcnt->tickcnt, sdcnt->tx_ctlerrs,
3113 sdcnt->tx_ctlpkts, sdcnt->rx_ctlerrs,
3114 sdcnt->rx_ctlpkts, sdcnt->rx_readahead_cnt);
3115
3116 return 0;
3117 }
3118
3119 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3120 {
3121 struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
3122 struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);
3123
3124 if (IS_ERR_OR_NULL(dentry))
3125 return;
3126
3127 bus->console_interval = BRCMF_CONSOLE;
3128
3129 brcmf_debugfs_add_entry(drvr, "forensics", brcmf_sdio_forensic_read);
3130 brcmf_debugfs_add_entry(drvr, "counters",
3131 brcmf_debugfs_sdio_count_read);
3132 debugfs_create_u32("console_interval", 0644, dentry,
3133 &bus->console_interval);
3134 }
3135 #else
3136 static int brcmf_sdio_checkdied(struct brcmf_sdio *bus)
3137 {
3138 return 0;
3139 }
3140
3141 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3142 {
3143 }
3144 #endif /* DEBUG */
3145
3146 static int
3147 brcmf_sdio_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
3148 {
3149 int timeleft;
3150 uint rxlen = 0;
3151 bool pending;
3152 u8 *buf;
3153 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3154 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3155 struct brcmf_sdio *bus = sdiodev->bus;
3156
3157 brcmf_dbg(TRACE, "Enter\n");
3158 if (sdiodev->state != BRCMF_SDIOD_DATA)
3159 return -EIO;
3160
3161 /* Wait until control frame is available */
3162 timeleft = brcmf_sdio_dcmd_resp_wait(bus, &bus->rxlen, &pending);
3163
3164 spin_lock_bh(&bus->rxctl_lock);
3165 rxlen = bus->rxlen;
3166 memcpy(msg, bus->rxctl, min(msglen, rxlen));
3167 bus->rxctl = NULL;
3168 buf = bus->rxctl_orig;
3169 bus->rxctl_orig = NULL;
3170 bus->rxlen = 0;
3171 spin_unlock_bh(&bus->rxctl_lock);
3172 vfree(buf);
3173
3174 if (rxlen) {
3175 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
3176 rxlen, msglen);
3177 } else if (timeleft == 0) {
3178 brcmf_err("resumed on timeout\n");
3179 brcmf_sdio_checkdied(bus);
3180 } else if (pending) {
3181 brcmf_dbg(CTL, "cancelled\n");
3182 return -ERESTARTSYS;
3183 } else {
3184 brcmf_dbg(CTL, "resumed for unknown reason?\n");
3185 brcmf_sdio_checkdied(bus);
3186 }
3187
3188 if (rxlen)
3189 bus->sdcnt.rx_ctlpkts++;
3190 else
3191 bus->sdcnt.rx_ctlerrs++;
3192
3193 return rxlen ? (int)rxlen : -ETIMEDOUT;
3194 }
3195
3196 #ifdef DEBUG
3197 static bool
3198 brcmf_sdio_verifymemory(struct brcmf_sdio_dev *sdiodev, u32 ram_addr,
3199 u8 *ram_data, uint ram_sz)
3200 {
3201 char *ram_cmp;
3202 int err;
3203 bool ret = true;
3204 int address;
3205 int offset;
3206 int len;
3207
3208 /* read back and verify */
3209 brcmf_dbg(INFO, "Compare RAM dl & ul at 0x%08x; size=%d\n", ram_addr,
3210 ram_sz);
3211 ram_cmp = kmalloc(MEMBLOCK, GFP_KERNEL);
3212 /* do not proceed while no memory but */
3213 if (!ram_cmp)
3214 return true;
3215
3216 address = ram_addr;
3217 offset = 0;
3218 while (offset < ram_sz) {
3219 len = ((offset + MEMBLOCK) < ram_sz) ? MEMBLOCK :
3220 ram_sz - offset;
3221 err = brcmf_sdiod_ramrw(sdiodev, false, address, ram_cmp, len);
3222 if (err) {
3223 brcmf_err("error %d on reading %d membytes at 0x%08x\n",
3224 err, len, address);
3225 ret = false;
3226 break;
3227 } else if (memcmp(ram_cmp, &ram_data[offset], len)) {
3228 brcmf_err("Downloaded RAM image is corrupted, block offset is %d, len is %d\n",
3229 offset, len);
3230 ret = false;
3231 break;
3232 }
3233 offset += len;
3234 address += len;
3235 }
3236
3237 kfree(ram_cmp);
3238
3239 return ret;
3240 }
3241 #else /* DEBUG */
3242 static bool
3243 brcmf_sdio_verifymemory(struct brcmf_sdio_dev *sdiodev, u32 ram_addr,
3244 u8 *ram_data, uint ram_sz)
3245 {
3246 return true;
3247 }
3248 #endif /* DEBUG */
3249
3250 static int brcmf_sdio_download_code_file(struct brcmf_sdio *bus,
3251 const struct firmware *fw)
3252 {
3253 int err;
3254
3255 brcmf_dbg(TRACE, "Enter\n");
3256
3257 err = brcmf_sdiod_ramrw(bus->sdiodev, true, bus->ci->rambase,
3258 (u8 *)fw->data, fw->size);
3259 if (err)
3260 brcmf_err("error %d on writing %d membytes at 0x%08x\n",
3261 err, (int)fw->size, bus->ci->rambase);
3262 else if (!brcmf_sdio_verifymemory(bus->sdiodev, bus->ci->rambase,
3263 (u8 *)fw->data, fw->size))
3264 err = -EIO;
3265
3266 return err;
3267 }
3268
3269 static int brcmf_sdio_download_nvram(struct brcmf_sdio *bus,
3270 void *vars, u32 varsz)
3271 {
3272 int address;
3273 int err;
3274
3275 brcmf_dbg(TRACE, "Enter\n");
3276
3277 address = bus->ci->ramsize - varsz + bus->ci->rambase;
3278 err = brcmf_sdiod_ramrw(bus->sdiodev, true, address, vars, varsz);
3279 if (err)
3280 brcmf_err("error %d on writing %d nvram bytes at 0x%08x\n",
3281 err, varsz, address);
3282 else if (!brcmf_sdio_verifymemory(bus->sdiodev, address, vars, varsz))
3283 err = -EIO;
3284
3285 return err;
3286 }
3287
3288 static int brcmf_sdio_download_firmware(struct brcmf_sdio *bus,
3289 const struct firmware *fw,
3290 void *nvram, u32 nvlen)
3291 {
3292 int bcmerror;
3293 u32 rstvec;
3294
3295 sdio_claim_host(bus->sdiodev->func1);
3296 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
3297
3298 rstvec = get_unaligned_le32(fw->data);
3299 brcmf_dbg(SDIO, "firmware rstvec: %x\n", rstvec);
3300
3301 bcmerror = brcmf_sdio_download_code_file(bus, fw);
3302 release_firmware(fw);
3303 if (bcmerror) {
3304 brcmf_err("dongle image file download failed\n");
3305 brcmf_fw_nvram_free(nvram);
3306 goto err;
3307 }
3308
3309 bcmerror = brcmf_sdio_download_nvram(bus, nvram, nvlen);
3310 brcmf_fw_nvram_free(nvram);
3311 if (bcmerror) {
3312 brcmf_err("dongle nvram file download failed\n");
3313 goto err;
3314 }
3315
3316 /* Take arm out of reset */
3317 if (!brcmf_chip_set_active(bus->ci, rstvec)) {
3318 brcmf_err("error getting out of ARM core reset\n");
3319 goto err;
3320 }
3321
3322 err:
3323 brcmf_sdio_clkctl(bus, CLK_SDONLY, false);
3324 sdio_release_host(bus->sdiodev->func1);
3325 return bcmerror;
3326 }
3327
3328 static void brcmf_sdio_sr_init(struct brcmf_sdio *bus)
3329 {
3330 int err = 0;
3331 u8 val;
3332
3333 brcmf_dbg(TRACE, "Enter\n");
3334
3335 val = brcmf_sdiod_readb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, &err);
3336 if (err) {
3337 brcmf_err("error reading SBSDIO_FUNC1_WAKEUPCTRL\n");
3338 return;
3339 }
3340
3341 val |= 1 << SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT;
3342 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, val, &err);
3343 if (err) {
3344 brcmf_err("error writing SBSDIO_FUNC1_WAKEUPCTRL\n");
3345 return;
3346 }
3347
3348 /* Add CMD14 Support */
3349 brcmf_sdiod_func0_wb(bus->sdiodev, SDIO_CCCR_BRCM_CARDCAP,
3350 (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT |
3351 SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT),
3352 &err);
3353 if (err) {
3354 brcmf_err("error writing SDIO_CCCR_BRCM_CARDCAP\n");
3355 return;
3356 }
3357
3358 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3359 SBSDIO_FORCE_HT, &err);
3360 if (err) {
3361 brcmf_err("error writing SBSDIO_FUNC1_CHIPCLKCSR\n");
3362 return;
3363 }
3364
3365 /* set flag */
3366 bus->sr_enabled = true;
3367 brcmf_dbg(INFO, "SR enabled\n");
3368 }
3369
3370 /* enable KSO bit */
3371 static int brcmf_sdio_kso_init(struct brcmf_sdio *bus)
3372 {
3373 struct brcmf_core *core = bus->sdio_core;
3374 u8 val;
3375 int err = 0;
3376
3377 brcmf_dbg(TRACE, "Enter\n");
3378
3379 /* KSO bit added in SDIO core rev 12 */
3380 if (core->rev < 12)
3381 return 0;
3382
3383 val = brcmf_sdiod_readb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, &err);
3384 if (err) {
3385 brcmf_err("error reading SBSDIO_FUNC1_SLEEPCSR\n");
3386 return err;
3387 }
3388
3389 if (!(val & SBSDIO_FUNC1_SLEEPCSR_KSO_MASK)) {
3390 val |= (SBSDIO_FUNC1_SLEEPCSR_KSO_EN <<
3391 SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
3392 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
3393 val, &err);
3394 if (err) {
3395 brcmf_err("error writing SBSDIO_FUNC1_SLEEPCSR\n");
3396 return err;
3397 }
3398 }
3399
3400 return 0;
3401 }
3402
3403
3404 static int brcmf_sdio_bus_preinit(struct device *dev)
3405 {
3406 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3407 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3408 struct brcmf_sdio *bus = sdiodev->bus;
3409 struct brcmf_core *core = bus->sdio_core;
3410 uint pad_size;
3411 u32 value;
3412 int err;
3413
3414 /* the commands below use the terms tx and rx from
3415 * a device perspective, ie. bus:txglom affects the
3416 * bus transfers from device to host.
3417 */
3418 if (core->rev < 12) {
3419 /* for sdio core rev < 12, disable txgloming */
3420 value = 0;
3421 err = brcmf_iovar_data_set(dev, "bus:txglom", &value,
3422 sizeof(u32));
3423 } else {
3424 /* otherwise, set txglomalign */
3425 value = sdiodev->settings->bus.sdio.sd_sgentry_align;
3426 /* SDIO ADMA requires at least 32 bit alignment */
3427 value = max_t(u32, value, ALIGNMENT);
3428 err = brcmf_iovar_data_set(dev, "bus:txglomalign", &value,
3429 sizeof(u32));
3430 }
3431
3432 if (err < 0)
3433 goto done;
3434
3435 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
3436 if (sdiodev->sg_support) {
3437 bus->txglom = false;
3438 value = 1;
3439 pad_size = bus->sdiodev->func2->cur_blksize << 1;
3440 err = brcmf_iovar_data_set(bus->sdiodev->dev, "bus:rxglom",
3441 &value, sizeof(u32));
3442 if (err < 0) {
3443 /* bus:rxglom is allowed to fail */
3444 err = 0;
3445 } else {
3446 bus->txglom = true;
3447 bus->tx_hdrlen += SDPCM_HWEXT_LEN;
3448 }
3449 }
3450 brcmf_bus_add_txhdrlen(bus->sdiodev->dev, bus->tx_hdrlen);
3451
3452 done:
3453 return err;
3454 }
3455
3456 static size_t brcmf_sdio_bus_get_ramsize(struct device *dev)
3457 {
3458 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3459 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3460 struct brcmf_sdio *bus = sdiodev->bus;
3461
3462 return bus->ci->ramsize - bus->ci->srsize;
3463 }
3464
3465 static int brcmf_sdio_bus_get_memdump(struct device *dev, void *data,
3466 size_t mem_size)
3467 {
3468 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3469 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3470 struct brcmf_sdio *bus = sdiodev->bus;
3471 int err;
3472 int address;
3473 int offset;
3474 int len;
3475
3476 brcmf_dbg(INFO, "dump at 0x%08x: size=%zu\n", bus->ci->rambase,
3477 mem_size);
3478
3479 address = bus->ci->rambase;
3480 offset = err = 0;
3481 sdio_claim_host(sdiodev->func1);
3482 while (offset < mem_size) {
3483 len = ((offset + MEMBLOCK) < mem_size) ? MEMBLOCK :
3484 mem_size - offset;
3485 err = brcmf_sdiod_ramrw(sdiodev, false, address, data, len);
3486 if (err) {
3487 brcmf_err("error %d on reading %d membytes at 0x%08x\n",
3488 err, len, address);
3489 goto done;
3490 }
3491 data += len;
3492 offset += len;
3493 address += len;
3494 }
3495
3496 done:
3497 sdio_release_host(sdiodev->func1);
3498 return err;
3499 }
3500
3501 void brcmf_sdio_trigger_dpc(struct brcmf_sdio *bus)
3502 {
3503 if (!bus->dpc_triggered) {
3504 bus->dpc_triggered = true;
3505 queue_work(bus->brcmf_wq, &bus->datawork);
3506 }
3507 }
3508
3509 void brcmf_sdio_isr(struct brcmf_sdio *bus)
3510 {
3511 brcmf_dbg(TRACE, "Enter\n");
3512
3513 if (!bus) {
3514 brcmf_err("bus is null pointer, exiting\n");
3515 return;
3516 }
3517
3518 /* Count the interrupt call */
3519 bus->sdcnt.intrcount++;
3520 if (in_interrupt())
3521 atomic_set(&bus->ipend, 1);
3522 else
3523 if (brcmf_sdio_intr_rstatus(bus)) {
3524 brcmf_err("failed backplane access\n");
3525 }
3526
3527 /* Disable additional interrupts (is this needed now)? */
3528 if (!bus->intr)
3529 brcmf_err("isr w/o interrupt configured!\n");
3530
3531 bus->dpc_triggered = true;
3532 queue_work(bus->brcmf_wq, &bus->datawork);
3533 }
3534
3535 static void brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus)
3536 {
3537 brcmf_dbg(TIMER, "Enter\n");
3538
3539 /* Poll period: check device if appropriate. */
3540 if (!bus->sr_enabled &&
3541 bus->poll && (++bus->polltick >= bus->pollrate)) {
3542 u32 intstatus = 0;
3543
3544 /* Reset poll tick */
3545 bus->polltick = 0;
3546
3547 /* Check device if no interrupts */
3548 if (!bus->intr ||
3549 (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {
3550
3551 if (!bus->dpc_triggered) {
3552 u8 devpend;
3553
3554 sdio_claim_host(bus->sdiodev->func1);
3555 devpend = brcmf_sdiod_func0_rb(bus->sdiodev,
3556 SDIO_CCCR_INTx, NULL);
3557 sdio_release_host(bus->sdiodev->func1);
3558 intstatus = devpend & (INTR_STATUS_FUNC1 |
3559 INTR_STATUS_FUNC2);
3560 }
3561
3562 /* If there is something, make like the ISR and
3563 schedule the DPC */
3564 if (intstatus) {
3565 bus->sdcnt.pollcnt++;
3566 atomic_set(&bus->ipend, 1);
3567
3568 bus->dpc_triggered = true;
3569 queue_work(bus->brcmf_wq, &bus->datawork);
3570 }
3571 }
3572
3573 /* Update interrupt tracking */
3574 bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
3575 }
3576 #ifdef DEBUG
3577 /* Poll for console output periodically */
3578 if (bus->sdiodev->state == BRCMF_SDIOD_DATA && BRCMF_FWCON_ON() &&
3579 bus->console_interval != 0) {
3580 bus->console.count += jiffies_to_msecs(BRCMF_WD_POLL);
3581 if (bus->console.count >= bus->console_interval) {
3582 bus->console.count -= bus->console_interval;
3583 sdio_claim_host(bus->sdiodev->func1);
3584 /* Make sure backplane clock is on */
3585 brcmf_sdio_bus_sleep(bus, false, false);
3586 if (brcmf_sdio_readconsole(bus) < 0)
3587 /* stop on error */
3588 bus->console_interval = 0;
3589 sdio_release_host(bus->sdiodev->func1);
3590 }
3591 }
3592 #endif /* DEBUG */
3593
3594 /* On idle timeout clear activity flag and/or turn off clock */
3595 if (!bus->dpc_triggered) {
3596 rmb();
3597 if ((!bus->dpc_running) && (bus->idletime > 0) &&
3598 (bus->clkstate == CLK_AVAIL)) {
3599 bus->idlecount++;
3600 if (bus->idlecount > bus->idletime) {
3601 brcmf_dbg(SDIO, "idle\n");
3602 sdio_claim_host(bus->sdiodev->func1);
3603 brcmf_sdio_wd_timer(bus, false);
3604 bus->idlecount = 0;
3605 brcmf_sdio_bus_sleep(bus, true, false);
3606 sdio_release_host(bus->sdiodev->func1);
3607 }
3608 } else {
3609 bus->idlecount = 0;
3610 }
3611 } else {
3612 bus->idlecount = 0;
3613 }
3614 }
3615
3616 static void brcmf_sdio_dataworker(struct work_struct *work)
3617 {
3618 struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
3619 datawork);
3620
3621 bus->dpc_running = true;
3622 wmb();
3623 while (READ_ONCE(bus->dpc_triggered)) {
3624 bus->dpc_triggered = false;
3625 brcmf_sdio_dpc(bus);
3626 bus->idlecount = 0;
3627 }
3628 bus->dpc_running = false;
3629 if (brcmf_sdiod_freezing(bus->sdiodev)) {
3630 brcmf_sdiod_change_state(bus->sdiodev, BRCMF_SDIOD_DOWN);
3631 brcmf_sdiod_try_freeze(bus->sdiodev);
3632 brcmf_sdiod_change_state(bus->sdiodev, BRCMF_SDIOD_DATA);
3633 }
3634 }
3635
3636 static void
3637 brcmf_sdio_drivestrengthinit(struct brcmf_sdio_dev *sdiodev,
3638 struct brcmf_chip *ci, u32 drivestrength)
3639 {
3640 const struct sdiod_drive_str *str_tab = NULL;
3641 u32 str_mask;
3642 u32 str_shift;
3643 u32 i;
3644 u32 drivestrength_sel = 0;
3645 u32 cc_data_temp;
3646 u32 addr;
3647
3648 if (!(ci->cc_caps & CC_CAP_PMU))
3649 return;
3650
3651 switch (SDIOD_DRVSTR_KEY(ci->chip, ci->pmurev)) {
3652 case SDIOD_DRVSTR_KEY(BRCM_CC_4330_CHIP_ID, 12):
3653 str_tab = sdiod_drvstr_tab1_1v8;
3654 str_mask = 0x00003800;
3655 str_shift = 11;
3656 break;
3657 case SDIOD_DRVSTR_KEY(BRCM_CC_4334_CHIP_ID, 17):
3658 str_tab = sdiod_drvstr_tab6_1v8;
3659 str_mask = 0x00001800;
3660 str_shift = 11;
3661 break;
3662 case SDIOD_DRVSTR_KEY(BRCM_CC_43143_CHIP_ID, 17):
3663 /* note: 43143 does not support tristate */
3664 i = ARRAY_SIZE(sdiod_drvstr_tab2_3v3) - 1;
3665 if (drivestrength >= sdiod_drvstr_tab2_3v3[i].strength) {
3666 str_tab = sdiod_drvstr_tab2_3v3;
3667 str_mask = 0x00000007;
3668 str_shift = 0;
3669 } else
3670 brcmf_err("Invalid SDIO Drive strength for chip %s, strength=%d\n",
3671 ci->name, drivestrength);
3672 break;
3673 case SDIOD_DRVSTR_KEY(BRCM_CC_43362_CHIP_ID, 13):
3674 str_tab = sdiod_drive_strength_tab5_1v8;
3675 str_mask = 0x00003800;
3676 str_shift = 11;
3677 break;
3678 default:
3679 brcmf_dbg(INFO, "No SDIO driver strength init needed for chip %s rev %d pmurev %d\n",
3680 ci->name, ci->chiprev, ci->pmurev);
3681 break;
3682 }
3683
3684 if (str_tab != NULL) {
3685 struct brcmf_core *pmu = brcmf_chip_get_pmu(ci);
3686
3687 for (i = 0; str_tab[i].strength != 0; i++) {
3688 if (drivestrength >= str_tab[i].strength) {
3689 drivestrength_sel = str_tab[i].sel;
3690 break;
3691 }
3692 }
3693 addr = CORE_CC_REG(pmu->base, chipcontrol_addr);
3694 brcmf_sdiod_writel(sdiodev, addr, 1, NULL);
3695 cc_data_temp = brcmf_sdiod_readl(sdiodev, addr, NULL);
3696 cc_data_temp &= ~str_mask;
3697 drivestrength_sel <<= str_shift;
3698 cc_data_temp |= drivestrength_sel;
3699 brcmf_sdiod_writel(sdiodev, addr, cc_data_temp, NULL);
3700
3701 brcmf_dbg(INFO, "SDIO: %d mA (req=%d mA) drive strength selected, set to 0x%08x\n",
3702 str_tab[i].strength, drivestrength, cc_data_temp);
3703 }
3704 }
3705
3706 static int brcmf_sdio_buscoreprep(void *ctx)
3707 {
3708 struct brcmf_sdio_dev *sdiodev = ctx;
3709 int err = 0;
3710 u8 clkval, clkset;
3711
3712 /* Try forcing SDIO core to do ALPAvail request only */
3713 clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_ALP_AVAIL_REQ;
3714 brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
3715 if (err) {
3716 brcmf_err("error writing for HT off\n");
3717 return err;
3718 }
3719
3720 /* If register supported, wait for ALPAvail and then force ALP */
3721 /* This may take up to 15 milliseconds */
3722 clkval = brcmf_sdiod_readb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, NULL);
3723
3724 if ((clkval & ~SBSDIO_AVBITS) != clkset) {
3725 brcmf_err("ChipClkCSR access: wrote 0x%02x read 0x%02x\n",
3726 clkset, clkval);
3727 return -EACCES;
3728 }
3729
3730 SPINWAIT(((clkval = brcmf_sdiod_readb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3731 NULL)),
3732 !SBSDIO_ALPAV(clkval)),
3733 PMU_MAX_TRANSITION_DLY);
3734
3735 if (!SBSDIO_ALPAV(clkval)) {
3736 brcmf_err("timeout on ALPAV wait, clkval 0x%02x\n",
3737 clkval);
3738 return -EBUSY;
3739 }
3740
3741 clkset = SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_FORCE_ALP;
3742 brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, clkset, &err);
3743 udelay(65);
3744
3745 /* Also, disable the extra SDIO pull-ups */
3746 brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_SDIOPULLUP, 0, NULL);
3747
3748 return 0;
3749 }
3750
3751 static void brcmf_sdio_buscore_activate(void *ctx, struct brcmf_chip *chip,
3752 u32 rstvec)
3753 {
3754 struct brcmf_sdio_dev *sdiodev = ctx;
3755 struct brcmf_core *core = sdiodev->bus->sdio_core;
3756 u32 reg_addr;
3757
3758 /* clear all interrupts */
3759 reg_addr = core->base + SD_REG(intstatus);
3760 brcmf_sdiod_writel(sdiodev, reg_addr, 0xFFFFFFFF, NULL);
3761
3762 if (rstvec)
3763 /* Write reset vector to address 0 */
3764 brcmf_sdiod_ramrw(sdiodev, true, 0, (void *)&rstvec,
3765 sizeof(rstvec));
3766 }
3767
3768 static u32 brcmf_sdio_buscore_read32(void *ctx, u32 addr)
3769 {
3770 struct brcmf_sdio_dev *sdiodev = ctx;
3771 u32 val, rev;
3772
3773 val = brcmf_sdiod_readl(sdiodev, addr, NULL);
3774
3775 /*
3776 * this is a bit of special handling if reading the chipcommon chipid
3777 * register. The 4339 is a next-gen of the 4335. It uses the same
3778 * SDIO device id as 4335 and the chipid register returns 4335 as well.
3779 * It can be identified as 4339 by looking at the chip revision. It
3780 * is corrected here so the chip.c module has the right info.
3781 */
3782 if (addr == CORE_CC_REG(SI_ENUM_BASE, chipid) &&
3783 (sdiodev->func1->device == SDIO_DEVICE_ID_BROADCOM_4339 ||
3784 sdiodev->func1->device == SDIO_DEVICE_ID_BROADCOM_4335_4339)) {
3785 rev = (val & CID_REV_MASK) >> CID_REV_SHIFT;
3786 if (rev >= 2) {
3787 val &= ~CID_ID_MASK;
3788 val |= BRCM_CC_4339_CHIP_ID;
3789 }
3790 }
3791
3792 return val;
3793 }
3794
3795 static void brcmf_sdio_buscore_write32(void *ctx, u32 addr, u32 val)
3796 {
3797 struct brcmf_sdio_dev *sdiodev = ctx;
3798
3799 brcmf_sdiod_writel(sdiodev, addr, val, NULL);
3800 }
3801
3802 static const struct brcmf_buscore_ops brcmf_sdio_buscore_ops = {
3803 .prepare = brcmf_sdio_buscoreprep,
3804 .activate = brcmf_sdio_buscore_activate,
3805 .read32 = brcmf_sdio_buscore_read32,
3806 .write32 = brcmf_sdio_buscore_write32,
3807 };
3808
3809 static bool
3810 brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
3811 {
3812 struct brcmf_sdio_dev *sdiodev;
3813 u8 clkctl = 0;
3814 int err = 0;
3815 int reg_addr;
3816 u32 reg_val;
3817 u32 drivestrength;
3818
3819 sdiodev = bus->sdiodev;
3820 sdio_claim_host(sdiodev->func1);
3821
3822 pr_debug("F1 signature read @0x18000000=0x%4x\n",
3823 brcmf_sdiod_readl(sdiodev, SI_ENUM_BASE, NULL));
3824
3825 /*
3826 * Force PLL off until brcmf_chip_attach()
3827 * programs PLL control regs
3828 */
3829
3830 brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, BRCMF_INIT_CLKCTL1,
3831 &err);
3832 if (!err)
3833 clkctl = brcmf_sdiod_readb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3834 &err);
3835
3836 if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3837 brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3838 err, BRCMF_INIT_CLKCTL1, clkctl);
3839 goto fail;
3840 }
3841
3842 bus->ci = brcmf_chip_attach(sdiodev, &brcmf_sdio_buscore_ops);
3843 if (IS_ERR(bus->ci)) {
3844 brcmf_err("brcmf_chip_attach failed!\n");
3845 bus->ci = NULL;
3846 goto fail;
3847 }
3848
3849 /* Pick up the SDIO core info struct from chip.c */
3850 bus->sdio_core = brcmf_chip_get_core(bus->ci, BCMA_CORE_SDIO_DEV);
3851 if (!bus->sdio_core)
3852 goto fail;
3853
3854 /* Pick up the CHIPCOMMON core info struct, for bulk IO in bcmsdh.c */
3855 sdiodev->cc_core = brcmf_chip_get_core(bus->ci, BCMA_CORE_CHIPCOMMON);
3856 if (!sdiodev->cc_core)
3857 goto fail;
3858
3859 sdiodev->settings = brcmf_get_module_param(sdiodev->dev,
3860 BRCMF_BUSTYPE_SDIO,
3861 bus->ci->chip,
3862 bus->ci->chiprev);
3863 if (!sdiodev->settings) {
3864 brcmf_err("Failed to get device parameters\n");
3865 goto fail;
3866 }
3867 /* platform specific configuration:
3868 * alignments must be at least 4 bytes for ADMA
3869 */
3870 bus->head_align = ALIGNMENT;
3871 bus->sgentry_align = ALIGNMENT;
3872 if (sdiodev->settings->bus.sdio.sd_head_align > ALIGNMENT)
3873 bus->head_align = sdiodev->settings->bus.sdio.sd_head_align;
3874 if (sdiodev->settings->bus.sdio.sd_sgentry_align > ALIGNMENT)
3875 bus->sgentry_align =
3876 sdiodev->settings->bus.sdio.sd_sgentry_align;
3877
3878 /* allocate scatter-gather table. sg support
3879 * will be disabled upon allocation failure.
3880 */
3881 brcmf_sdiod_sgtable_alloc(sdiodev);
3882
3883 #ifdef CONFIG_PM_SLEEP
3884 /* wowl can be supported when KEEP_POWER is true and (WAKE_SDIO_IRQ
3885 * is true or when platform data OOB irq is true).
3886 */
3887 if ((sdio_get_host_pm_caps(sdiodev->func1) & MMC_PM_KEEP_POWER) &&
3888 ((sdio_get_host_pm_caps(sdiodev->func1) & MMC_PM_WAKE_SDIO_IRQ) ||
3889 (sdiodev->settings->bus.sdio.oob_irq_supported)))
3890 sdiodev->bus_if->wowl_supported = true;
3891 #endif
3892
3893 if (brcmf_sdio_kso_init(bus)) {
3894 brcmf_err("error enabling KSO\n");
3895 goto fail;
3896 }
3897
3898 if (sdiodev->settings->bus.sdio.drive_strength)
3899 drivestrength = sdiodev->settings->bus.sdio.drive_strength;
3900 else
3901 drivestrength = DEFAULT_SDIO_DRIVE_STRENGTH;
3902 brcmf_sdio_drivestrengthinit(sdiodev, bus->ci, drivestrength);
3903
3904 /* Set card control so an SDIO card reset does a WLAN backplane reset */
3905 reg_val = brcmf_sdiod_func0_rb(sdiodev, SDIO_CCCR_BRCM_CARDCTRL, &err);
3906 if (err)
3907 goto fail;
3908
3909 reg_val |= SDIO_CCCR_BRCM_CARDCTRL_WLANRESET;
3910
3911 brcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err);
3912 if (err)
3913 goto fail;
3914
3915 /* set PMUControl so a backplane reset does PMU state reload */
3916 reg_addr = CORE_CC_REG(brcmf_chip_get_pmu(bus->ci)->base, pmucontrol);
3917 reg_val = brcmf_sdiod_readl(sdiodev, reg_addr, &err);
3918 if (err)
3919 goto fail;
3920
3921 reg_val |= (BCMA_CC_PMU_CTL_RES_RELOAD << BCMA_CC_PMU_CTL_RES_SHIFT);
3922
3923 brcmf_sdiod_writel(sdiodev, reg_addr, reg_val, &err);
3924 if (err)
3925 goto fail;
3926
3927 sdio_release_host(sdiodev->func1);
3928
3929 brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3930
3931 /* allocate header buffer */
3932 bus->hdrbuf = kzalloc(MAX_HDR_READ + bus->head_align, GFP_KERNEL);
3933 if (!bus->hdrbuf)
3934 return false;
3935 /* Locate an appropriately-aligned portion of hdrbuf */
3936 bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3937 bus->head_align);
3938
3939 /* Set the poll and/or interrupt flags */
3940 bus->intr = true;
3941 bus->poll = false;
3942 if (bus->poll)
3943 bus->pollrate = 1;
3944
3945 return true;
3946
3947 fail:
3948 sdio_release_host(sdiodev->func1);
3949 return false;
3950 }
3951
3952 static int
3953 brcmf_sdio_watchdog_thread(void *data)
3954 {
3955 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3956 int wait;
3957
3958 allow_signal(SIGTERM);
3959 /* Run until signal received */
3960 brcmf_sdiod_freezer_count(bus->sdiodev);
3961 while (1) {
3962 if (kthread_should_stop())
3963 break;
3964 brcmf_sdiod_freezer_uncount(bus->sdiodev);
3965 wait = wait_for_completion_interruptible(&bus->watchdog_wait);
3966 brcmf_sdiod_freezer_count(bus->sdiodev);
3967 brcmf_sdiod_try_freeze(bus->sdiodev);
3968 if (!wait) {
3969 brcmf_sdio_bus_watchdog(bus);
3970 /* Count the tick for reference */
3971 bus->sdcnt.tickcnt++;
3972 reinit_completion(&bus->watchdog_wait);
3973 } else
3974 break;
3975 }
3976 return 0;
3977 }
3978
3979 static void
3980 brcmf_sdio_watchdog(struct timer_list *t)
3981 {
3982 struct brcmf_sdio *bus = from_timer(bus, t, timer);
3983
3984 if (bus->watchdog_tsk) {
3985 complete(&bus->watchdog_wait);
3986 /* Reschedule the watchdog */
3987 if (bus->wd_active)
3988 mod_timer(&bus->timer,
3989 jiffies + BRCMF_WD_POLL);
3990 }
3991 }
3992
3993 static int brcmf_sdio_get_fwname(struct device *dev, u32 chip, u32 chiprev,
3994 u8 *fw_name)
3995 {
3996 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3997 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3998 int ret = 0;
3999
4000 if (sdiodev->fw_name[0] != '\0')
4001 strlcpy(fw_name, sdiodev->fw_name, BRCMF_FW_NAME_LEN);
4002 else
4003 ret = brcmf_fw_map_chip_to_name(chip, chiprev,
4004 brcmf_sdio_fwnames,
4005 ARRAY_SIZE(brcmf_sdio_fwnames),
4006 fw_name, NULL);
4007
4008 return ret;
4009 }
4010
4011 static const struct brcmf_bus_ops brcmf_sdio_bus_ops = {
4012 .stop = brcmf_sdio_bus_stop,
4013 .preinit = brcmf_sdio_bus_preinit,
4014 .txdata = brcmf_sdio_bus_txdata,
4015 .txctl = brcmf_sdio_bus_txctl,
4016 .rxctl = brcmf_sdio_bus_rxctl,
4017 .gettxq = brcmf_sdio_bus_gettxq,
4018 .wowl_config = brcmf_sdio_wowl_config,
4019 .get_ramsize = brcmf_sdio_bus_get_ramsize,
4020 .get_memdump = brcmf_sdio_bus_get_memdump,
4021 .get_fwname = brcmf_sdio_get_fwname,
4022 };
4023
4024 static void brcmf_sdio_firmware_callback(struct device *dev, int err,
4025 const struct firmware *code,
4026 void *nvram, u32 nvram_len)
4027 {
4028 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
4029 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
4030 struct brcmf_sdio *bus = sdiodev->bus;
4031 struct brcmf_sdio_dev *sdiod = bus->sdiodev;
4032 struct brcmf_core *core = bus->sdio_core;
4033 u8 saveclk;
4034
4035 brcmf_dbg(TRACE, "Enter: dev=%s, err=%d\n", dev_name(dev), err);
4036
4037 if (err)
4038 goto fail;
4039
4040 if (!bus_if->drvr)
4041 return;
4042
4043 /* try to download image and nvram to the dongle */
4044 bus->alp_only = true;
4045 err = brcmf_sdio_download_firmware(bus, code, nvram, nvram_len);
4046 if (err)
4047 goto fail;
4048 bus->alp_only = false;
4049
4050 /* Start the watchdog timer */
4051 bus->sdcnt.tickcnt = 0;
4052 brcmf_sdio_wd_timer(bus, true);
4053
4054 sdio_claim_host(sdiodev->func1);
4055
4056 /* Make sure backplane clock is on, needed to generate F2 interrupt */
4057 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
4058 if (bus->clkstate != CLK_AVAIL)
4059 goto release;
4060
4061 /* Force clocks on backplane to be sure F2 interrupt propagates */
4062 saveclk = brcmf_sdiod_readb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, &err);
4063 if (!err) {
4064 brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
4065 (saveclk | SBSDIO_FORCE_HT), &err);
4066 }
4067 if (err) {
4068 brcmf_err("Failed to force clock for F2: err %d\n", err);
4069 goto release;
4070 }
4071
4072 /* Enable function 2 (frame transfers) */
4073 brcmf_sdiod_writel(sdiod, core->base + SD_REG(tosbmailboxdata),
4074 SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT, NULL);
4075
4076 err = sdio_enable_func(sdiodev->func2);
4077
4078 brcmf_dbg(INFO, "enable F2: err=%d\n", err);
4079
4080 /* If F2 successfully enabled, set core and enable interrupts */
4081 if (!err) {
4082 /* Set up the interrupt mask and enable interrupts */
4083 bus->hostintmask = HOSTINTMASK;
4084 brcmf_sdiod_writel(sdiod, core->base + SD_REG(hostintmask),
4085 bus->hostintmask, NULL);
4086
4087
4088 brcmf_sdiod_writeb(sdiodev, SBSDIO_WATERMARK, 8, &err);
4089 } else {
4090 /* Disable F2 again */
4091 sdio_disable_func(sdiodev->func2);
4092 goto release;
4093 }
4094
4095 if (brcmf_chip_sr_capable(bus->ci)) {
4096 brcmf_sdio_sr_init(bus);
4097 } else {
4098 /* Restore previous clock setting */
4099 brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
4100 saveclk, &err);
4101 }
4102
4103 if (err == 0) {
4104 /* Allow full data communication using DPC from now on. */
4105 brcmf_sdiod_change_state(bus->sdiodev, BRCMF_SDIOD_DATA);
4106
4107 err = brcmf_sdiod_intr_register(sdiodev);
4108 if (err != 0)
4109 brcmf_err("intr register failed:%d\n", err);
4110 }
4111
4112 /* If we didn't come up, turn off backplane clock */
4113 if (err != 0)
4114 brcmf_sdio_clkctl(bus, CLK_NONE, false);
4115
4116 sdio_release_host(sdiodev->func1);
4117
4118 err = brcmf_bus_started(dev);
4119 if (err != 0) {
4120 brcmf_err("dongle is not responding\n");
4121 goto fail;
4122 }
4123 return;
4124
4125 release:
4126 sdio_release_host(sdiodev->func1);
4127 fail:
4128 brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), err);
4129 device_release_driver(&sdiodev->func2->dev);
4130 device_release_driver(dev);
4131 }
4132
4133 struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
4134 {
4135 int ret;
4136 struct brcmf_sdio *bus;
4137 struct workqueue_struct *wq;
4138
4139 brcmf_dbg(TRACE, "Enter\n");
4140
4141 /* Allocate private bus interface state */
4142 bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
4143 if (!bus)
4144 goto fail;
4145
4146 bus->sdiodev = sdiodev;
4147 sdiodev->bus = bus;
4148 skb_queue_head_init(&bus->glom);
4149 bus->txbound = BRCMF_TXBOUND;
4150 bus->rxbound = BRCMF_RXBOUND;
4151 bus->txminmax = BRCMF_TXMINMAX;
4152 bus->tx_seq = SDPCM_SEQ_WRAP - 1;
4153
4154 /* single-threaded workqueue */
4155 wq = alloc_ordered_workqueue("brcmf_wq/%s", WQ_MEM_RECLAIM,
4156 dev_name(&sdiodev->func1->dev));
4157 if (!wq) {
4158 brcmf_err("insufficient memory to create txworkqueue\n");
4159 goto fail;
4160 }
4161 brcmf_sdiod_freezer_count(sdiodev);
4162 INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
4163 bus->brcmf_wq = wq;
4164
4165 /* attempt to attach to the dongle */
4166 if (!(brcmf_sdio_probe_attach(bus))) {
4167 brcmf_err("brcmf_sdio_probe_attach failed\n");
4168 goto fail;
4169 }
4170
4171 spin_lock_init(&bus->rxctl_lock);
4172 spin_lock_init(&bus->txq_lock);
4173 init_waitqueue_head(&bus->ctrl_wait);
4174 init_waitqueue_head(&bus->dcmd_resp_wait);
4175
4176 /* Set up the watchdog timer */
4177 timer_setup(&bus->timer, brcmf_sdio_watchdog, 0);
4178 /* Initialize watchdog thread */
4179 init_completion(&bus->watchdog_wait);
4180 bus->watchdog_tsk = kthread_run(brcmf_sdio_watchdog_thread,
4181 bus, "brcmf_wdog/%s",
4182 dev_name(&sdiodev->func1->dev));
4183 if (IS_ERR(bus->watchdog_tsk)) {
4184 pr_warn("brcmf_watchdog thread failed to start\n");
4185 bus->watchdog_tsk = NULL;
4186 }
4187 /* Initialize DPC thread */
4188 bus->dpc_triggered = false;
4189 bus->dpc_running = false;
4190
4191 /* Assign bus interface call back */
4192 bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
4193 bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops;
4194 bus->sdiodev->bus_if->chip = bus->ci->chip;
4195 bus->sdiodev->bus_if->chiprev = bus->ci->chiprev;
4196
4197 /* default sdio bus header length for tx packet */
4198 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
4199
4200 /* Attach to the common layer, reserve hdr space */
4201 ret = brcmf_attach(bus->sdiodev->dev, bus->sdiodev->settings);
4202 if (ret != 0) {
4203 brcmf_err("brcmf_attach failed\n");
4204 goto fail;
4205 }
4206
4207 /* Query the F2 block size, set roundup accordingly */
4208 bus->blocksize = bus->sdiodev->func2->cur_blksize;
4209 bus->roundup = min(max_roundup, bus->blocksize);
4210
4211 /* Allocate buffers */
4212 if (bus->sdiodev->bus_if->maxctl) {
4213 bus->sdiodev->bus_if->maxctl += bus->roundup;
4214 bus->rxblen =
4215 roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
4216 ALIGNMENT) + bus->head_align;
4217 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
4218 if (!(bus->rxbuf)) {
4219 brcmf_err("rxbuf allocation failed\n");
4220 goto fail;
4221 }
4222 }
4223
4224 sdio_claim_host(bus->sdiodev->func1);
4225
4226 /* Disable F2 to clear any intermediate frame state on the dongle */
4227 sdio_disable_func(bus->sdiodev->func2);
4228
4229 bus->rxflow = false;
4230
4231 /* Done with backplane-dependent accesses, can drop clock... */
4232 brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
4233
4234 sdio_release_host(bus->sdiodev->func1);
4235
4236 /* ...and initialize clock/power states */
4237 bus->clkstate = CLK_SDONLY;
4238 bus->idletime = BRCMF_IDLE_INTERVAL;
4239 bus->idleclock = BRCMF_IDLE_ACTIVE;
4240
4241 /* SR state */
4242 bus->sr_enabled = false;
4243
4244 brcmf_sdio_debugfs_create(bus);
4245 brcmf_dbg(INFO, "completed!!\n");
4246
4247 ret = brcmf_fw_map_chip_to_name(bus->ci->chip, bus->ci->chiprev,
4248 brcmf_sdio_fwnames,
4249 ARRAY_SIZE(brcmf_sdio_fwnames),
4250 sdiodev->fw_name, sdiodev->nvram_name);
4251 if (ret)
4252 goto fail;
4253
4254 ret = brcmf_fw_get_firmwares(sdiodev->dev, BRCMF_FW_REQUEST_NVRAM,
4255 sdiodev->fw_name, sdiodev->nvram_name,
4256 brcmf_sdio_firmware_callback);
4257 if (ret != 0) {
4258 brcmf_err("async firmware request failed: %d\n", ret);
4259 goto fail;
4260 }
4261
4262 return bus;
4263
4264 fail:
4265 brcmf_sdio_remove(bus);
4266 return NULL;
4267 }
4268
4269 /* Detach and free everything */
4270 void brcmf_sdio_remove(struct brcmf_sdio *bus)
4271 {
4272 brcmf_dbg(TRACE, "Enter\n");
4273
4274 if (bus) {
4275 /* De-register interrupt handler */
4276 brcmf_sdiod_intr_unregister(bus->sdiodev);
4277
4278 brcmf_detach(bus->sdiodev->dev);
4279
4280 cancel_work_sync(&bus->datawork);
4281 if (bus->brcmf_wq)
4282 destroy_workqueue(bus->brcmf_wq);
4283
4284 if (bus->ci) {
4285 if (bus->sdiodev->state != BRCMF_SDIOD_NOMEDIUM) {
4286 sdio_claim_host(bus->sdiodev->func1);
4287 brcmf_sdio_wd_timer(bus, false);
4288 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
4289 /* Leave the device in state where it is
4290 * 'passive'. This is done by resetting all
4291 * necessary cores.
4292 */
4293 msleep(20);
4294 brcmf_chip_set_passive(bus->ci);
4295 brcmf_sdio_clkctl(bus, CLK_NONE, false);
4296 sdio_release_host(bus->sdiodev->func1);
4297 }
4298 brcmf_chip_detach(bus->ci);
4299 }
4300 if (bus->sdiodev->settings)
4301 brcmf_release_module_param(bus->sdiodev->settings);
4302
4303 kfree(bus->rxbuf);
4304 kfree(bus->hdrbuf);
4305 kfree(bus);
4306 }
4307
4308 brcmf_dbg(TRACE, "Disconnected\n");
4309 }
4310
4311 void brcmf_sdio_wd_timer(struct brcmf_sdio *bus, bool active)
4312 {
4313 /* Totally stop the timer */
4314 if (!active && bus->wd_active) {
4315 del_timer_sync(&bus->timer);
4316 bus->wd_active = false;
4317 return;
4318 }
4319
4320 /* don't start the wd until fw is loaded */
4321 if (bus->sdiodev->state != BRCMF_SDIOD_DATA)
4322 return;
4323
4324 if (active) {
4325 if (!bus->wd_active) {
4326 /* Create timer again when watchdog period is
4327 dynamically changed or in the first instance
4328 */
4329 bus->timer.expires = jiffies + BRCMF_WD_POLL;
4330 add_timer(&bus->timer);
4331 bus->wd_active = true;
4332 } else {
4333 /* Re arm the timer, at last watchdog period */
4334 mod_timer(&bus->timer, jiffies + BRCMF_WD_POLL);
4335 }
4336 }
4337 }
4338
4339 int brcmf_sdio_sleep(struct brcmf_sdio *bus, bool sleep)
4340 {
4341 int ret;
4342
4343 sdio_claim_host(bus->sdiodev->func1);
4344 ret = brcmf_sdio_bus_sleep(bus, sleep, false);
4345 sdio_release_host(bus->sdiodev->func1);
4346
4347 return ret;
4348 }
4349
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