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Arend van Spriel5b435de2011-10-05 13:19:03 +02001/*
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
Joe Perches02f77192012-01-15 00:38:44 -080017#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
Arend van Spriel5b435de2011-10-05 13:19:03 +020019#include <linux/types.h>
20#include <linux/kernel.h>
21#include <linux/kthread.h>
22#include <linux/printk.h>
23#include <linux/pci_ids.h>
24#include <linux/netdevice.h>
25#include <linux/interrupt.h>
26#include <linux/sched.h>
27#include <linux/mmc/sdio.h>
28#include <linux/mmc/sdio_func.h>
29#include <linux/mmc/card.h>
30#include <linux/semaphore.h>
31#include <linux/firmware.h>
Stephen Rothwellb7a57e72011-10-12 21:35:07 +020032#include <linux/module.h>
Franky Lin99ba15c2011-11-04 22:23:42 +010033#include <linux/bcma/bcma.h>
Arend van Spriel4fc0d012012-06-14 12:16:57 +020034#include <linux/debugfs.h>
Arend van Spriel8dc01812012-06-21 11:33:32 +020035#include <linux/vmalloc.h>
Arend van Spriel5b435de2011-10-05 13:19:03 +020036#include <asm/unaligned.h>
37#include <defs.h>
38#include <brcmu_wifi.h>
39#include <brcmu_utils.h>
40#include <brcm_hw_ids.h>
41#include <soc.h>
42#include "sdio_host.h"
Franky Lina83369b2011-11-04 22:23:28 +010043#include "sdio_chip.h"
Arend van Spriel5b435de2011-10-05 13:19:03 +020044
45#define DCMD_RESP_TIMEOUT 2000 /* In milli second */
46
Joe Perches8ae74652012-01-15 00:38:38 -080047#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +020048
49#define BRCMF_TRAP_INFO_SIZE 80
50
51#define CBUF_LEN (128)
52
Arend van Spriel4fc0d012012-06-14 12:16:57 +020053/* Device console log buffer state */
54#define CONSOLE_BUFFER_MAX 2024
55
Arend van Spriel5b435de2011-10-05 13:19:03 +020056struct rte_log_le {
57 __le32 buf; /* Can't be pointer on (64-bit) hosts */
58 __le32 buf_size;
59 __le32 idx;
60 char *_buf_compat; /* Redundant pointer for backward compat. */
61};
62
63struct rte_console {
64 /* Virtual UART
65 * When there is no UART (e.g. Quickturn),
66 * the host should write a complete
67 * input line directly into cbuf and then write
68 * the length into vcons_in.
69 * This may also be used when there is a real UART
70 * (at risk of conflicting with
71 * the real UART). vcons_out is currently unused.
72 */
73 uint vcons_in;
74 uint vcons_out;
75
76 /* Output (logging) buffer
77 * Console output is written to a ring buffer log_buf at index log_idx.
78 * The host may read the output when it sees log_idx advance.
79 * Output will be lost if the output wraps around faster than the host
80 * polls.
81 */
82 struct rte_log_le log_le;
83
84 /* Console input line buffer
85 * Characters are read one at a time into cbuf
86 * until <CR> is received, then
87 * the buffer is processed as a command line.
88 * Also used for virtual UART.
89 */
90 uint cbuf_idx;
91 char cbuf[CBUF_LEN];
92};
93
Joe Perches8ae74652012-01-15 00:38:38 -080094#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +020095#include <chipcommon.h>
96
Arend van Spriel5b435de2011-10-05 13:19:03 +020097#include "dhd_bus.h"
Arend van Spriel5b435de2011-10-05 13:19:03 +020098#include "dhd_dbg.h"
Arend van Spriel5b435de2011-10-05 13:19:03 +020099
100#define TXQLEN 2048 /* bulk tx queue length */
101#define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */
102#define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */
103#define PRIOMASK 7
104
105#define TXRETRIES 2 /* # of retries for tx frames */
106
107#define BRCMF_RXBOUND 50 /* Default for max rx frames in
108 one scheduling */
109
110#define BRCMF_TXBOUND 20 /* Default for max tx frames in
111 one scheduling */
112
113#define BRCMF_TXMINMAX 1 /* Max tx frames if rx still pending */
114
115#define MEMBLOCK 2048 /* Block size used for downloading
116 of dongle image */
117#define MAX_DATA_BUF (32 * 1024) /* Must be large enough to hold
118 biggest possible glom */
119
120#define BRCMF_FIRSTREAD (1 << 6)
121
122
123/* SBSDIO_DEVICE_CTL */
124
125/* 1: device will assert busy signal when receiving CMD53 */
126#define SBSDIO_DEVCTL_SETBUSY 0x01
127/* 1: assertion of sdio interrupt is synchronous to the sdio clock */
128#define SBSDIO_DEVCTL_SPI_INTR_SYNC 0x02
129/* 1: mask all interrupts to host except the chipActive (rev 8) */
130#define SBSDIO_DEVCTL_CA_INT_ONLY 0x04
131/* 1: isolate internal sdio signals, put external pads in tri-state; requires
132 * sdio bus power cycle to clear (rev 9) */
133#define SBSDIO_DEVCTL_PADS_ISO 0x08
134/* Force SD->SB reset mapping (rev 11) */
135#define SBSDIO_DEVCTL_SB_RST_CTL 0x30
136/* Determined by CoreControl bit */
137#define SBSDIO_DEVCTL_RST_CORECTL 0x00
138/* Force backplane reset */
139#define SBSDIO_DEVCTL_RST_BPRESET 0x10
140/* Force no backplane reset */
141#define SBSDIO_DEVCTL_RST_NOBPRESET 0x20
142
Arend van Spriel5b435de2011-10-05 13:19:03 +0200143/* direct(mapped) cis space */
144
145/* MAPPED common CIS address */
146#define SBSDIO_CIS_BASE_COMMON 0x1000
147/* maximum bytes in one CIS */
148#define SBSDIO_CIS_SIZE_LIMIT 0x200
149/* cis offset addr is < 17 bits */
150#define SBSDIO_CIS_OFT_ADDR_MASK 0x1FFFF
151
152/* manfid tuple length, include tuple, link bytes */
153#define SBSDIO_CIS_MANFID_TUPLE_LEN 6
154
155/* intstatus */
156#define I_SMB_SW0 (1 << 0) /* To SB Mail S/W interrupt 0 */
157#define I_SMB_SW1 (1 << 1) /* To SB Mail S/W interrupt 1 */
158#define I_SMB_SW2 (1 << 2) /* To SB Mail S/W interrupt 2 */
159#define I_SMB_SW3 (1 << 3) /* To SB Mail S/W interrupt 3 */
160#define I_SMB_SW_MASK 0x0000000f /* To SB Mail S/W interrupts mask */
161#define I_SMB_SW_SHIFT 0 /* To SB Mail S/W interrupts shift */
162#define I_HMB_SW0 (1 << 4) /* To Host Mail S/W interrupt 0 */
163#define I_HMB_SW1 (1 << 5) /* To Host Mail S/W interrupt 1 */
164#define I_HMB_SW2 (1 << 6) /* To Host Mail S/W interrupt 2 */
165#define I_HMB_SW3 (1 << 7) /* To Host Mail S/W interrupt 3 */
166#define I_HMB_SW_MASK 0x000000f0 /* To Host Mail S/W interrupts mask */
167#define I_HMB_SW_SHIFT 4 /* To Host Mail S/W interrupts shift */
168#define I_WR_OOSYNC (1 << 8) /* Write Frame Out Of Sync */
169#define I_RD_OOSYNC (1 << 9) /* Read Frame Out Of Sync */
170#define I_PC (1 << 10) /* descriptor error */
171#define I_PD (1 << 11) /* data error */
172#define I_DE (1 << 12) /* Descriptor protocol Error */
173#define I_RU (1 << 13) /* Receive descriptor Underflow */
174#define I_RO (1 << 14) /* Receive fifo Overflow */
175#define I_XU (1 << 15) /* Transmit fifo Underflow */
176#define I_RI (1 << 16) /* Receive Interrupt */
177#define I_BUSPWR (1 << 17) /* SDIO Bus Power Change (rev 9) */
178#define I_XMTDATA_AVAIL (1 << 23) /* bits in fifo */
179#define I_XI (1 << 24) /* Transmit Interrupt */
180#define I_RF_TERM (1 << 25) /* Read Frame Terminate */
181#define I_WF_TERM (1 << 26) /* Write Frame Terminate */
182#define I_PCMCIA_XU (1 << 27) /* PCMCIA Transmit FIFO Underflow */
183#define I_SBINT (1 << 28) /* sbintstatus Interrupt */
184#define I_CHIPACTIVE (1 << 29) /* chip from doze to active state */
185#define I_SRESET (1 << 30) /* CCCR RES interrupt */
186#define I_IOE2 (1U << 31) /* CCCR IOE2 Bit Changed */
187#define I_ERRORS (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
188#define I_DMA (I_RI | I_XI | I_ERRORS)
189
190/* corecontrol */
191#define CC_CISRDY (1 << 0) /* CIS Ready */
192#define CC_BPRESEN (1 << 1) /* CCCR RES signal */
193#define CC_F2RDY (1 << 2) /* set CCCR IOR2 bit */
194#define CC_CLRPADSISO (1 << 3) /* clear SDIO pads isolation */
195#define CC_XMTDATAAVAIL_MODE (1 << 4)
196#define CC_XMTDATAAVAIL_CTRL (1 << 5)
197
198/* SDA_FRAMECTRL */
199#define SFC_RF_TERM (1 << 0) /* Read Frame Terminate */
200#define SFC_WF_TERM (1 << 1) /* Write Frame Terminate */
201#define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */
202#define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */
203
204/* HW frame tag */
205#define SDPCM_FRAMETAG_LEN 4 /* 2 bytes len, 2 bytes check val */
206
207/* Total length of frame header for dongle protocol */
208#define SDPCM_HDRLEN (SDPCM_FRAMETAG_LEN + SDPCM_SWHEADER_LEN)
209#define SDPCM_RESERVE (SDPCM_HDRLEN + BRCMF_SDALIGN)
210
211/*
212 * Software allocation of To SB Mailbox resources
213 */
214
215/* tosbmailbox bits corresponding to intstatus bits */
216#define SMB_NAK (1 << 0) /* Frame NAK */
217#define SMB_INT_ACK (1 << 1) /* Host Interrupt ACK */
218#define SMB_USE_OOB (1 << 2) /* Use OOB Wakeup */
219#define SMB_DEV_INT (1 << 3) /* Miscellaneous Interrupt */
220
221/* tosbmailboxdata */
222#define SMB_DATA_VERSION_SHIFT 16 /* host protocol version */
223
224/*
225 * Software allocation of To Host Mailbox resources
226 */
227
228/* intstatus bits */
229#define I_HMB_FC_STATE I_HMB_SW0 /* Flow Control State */
230#define I_HMB_FC_CHANGE I_HMB_SW1 /* Flow Control State Changed */
231#define I_HMB_FRAME_IND I_HMB_SW2 /* Frame Indication */
232#define I_HMB_HOST_INT I_HMB_SW3 /* Miscellaneous Interrupt */
233
234/* tohostmailboxdata */
235#define HMB_DATA_NAKHANDLED 1 /* retransmit NAK'd frame */
236#define HMB_DATA_DEVREADY 2 /* talk to host after enable */
237#define HMB_DATA_FC 4 /* per prio flowcontrol update flag */
238#define HMB_DATA_FWREADY 8 /* fw ready for protocol activity */
239
240#define HMB_DATA_FCDATA_MASK 0xff000000
241#define HMB_DATA_FCDATA_SHIFT 24
242
243#define HMB_DATA_VERSION_MASK 0x00ff0000
244#define HMB_DATA_VERSION_SHIFT 16
245
246/*
247 * Software-defined protocol header
248 */
249
250/* Current protocol version */
251#define SDPCM_PROT_VERSION 4
252
253/* SW frame header */
254#define SDPCM_PACKET_SEQUENCE(p) (((u8 *)p)[0] & 0xff)
255
256#define SDPCM_CHANNEL_MASK 0x00000f00
257#define SDPCM_CHANNEL_SHIFT 8
258#define SDPCM_PACKET_CHANNEL(p) (((u8 *)p)[1] & 0x0f)
259
260#define SDPCM_NEXTLEN_OFFSET 2
261
262/* Data Offset from SOF (HW Tag, SW Tag, Pad) */
263#define SDPCM_DOFFSET_OFFSET 3 /* Data Offset */
264#define SDPCM_DOFFSET_VALUE(p) (((u8 *)p)[SDPCM_DOFFSET_OFFSET] & 0xff)
265#define SDPCM_DOFFSET_MASK 0xff000000
266#define SDPCM_DOFFSET_SHIFT 24
267#define SDPCM_FCMASK_OFFSET 4 /* Flow control */
268#define SDPCM_FCMASK_VALUE(p) (((u8 *)p)[SDPCM_FCMASK_OFFSET] & 0xff)
269#define SDPCM_WINDOW_OFFSET 5 /* Credit based fc */
270#define SDPCM_WINDOW_VALUE(p) (((u8 *)p)[SDPCM_WINDOW_OFFSET] & 0xff)
271
272#define SDPCM_SWHEADER_LEN 8 /* SW header is 64 bits */
273
274/* logical channel numbers */
275#define SDPCM_CONTROL_CHANNEL 0 /* Control channel Id */
276#define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication Channel Id */
277#define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv Channel Id */
278#define SDPCM_GLOM_CHANNEL 3 /* For coalesced packets */
279#define SDPCM_TEST_CHANNEL 15 /* Reserved for test/debug packets */
280
281#define SDPCM_SEQUENCE_WRAP 256 /* wrap-around val for 8bit frame seq */
282
283#define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80)
284
285/*
286 * Shared structure between dongle and the host.
287 * The structure contains pointers to trap or assert information.
288 */
Arend van Spriel4fc0d012012-06-14 12:16:57 +0200289#define SDPCM_SHARED_VERSION 0x0003
Arend van Spriel5b435de2011-10-05 13:19:03 +0200290#define SDPCM_SHARED_VERSION_MASK 0x00FF
291#define SDPCM_SHARED_ASSERT_BUILT 0x0100
292#define SDPCM_SHARED_ASSERT 0x0200
293#define SDPCM_SHARED_TRAP 0x0400
294
295/* Space for header read, limit for data packets */
296#define MAX_HDR_READ (1 << 6)
297#define MAX_RX_DATASZ 2048
298
299/* Maximum milliseconds to wait for F2 to come up */
300#define BRCMF_WAIT_F2RDY 3000
301
302/* Bump up limit on waiting for HT to account for first startup;
303 * if the image is doing a CRC calculation before programming the PMU
304 * for HT availability, it could take a couple hundred ms more, so
305 * max out at a 1 second (1000000us).
306 */
307#undef PMU_MAX_TRANSITION_DLY
308#define PMU_MAX_TRANSITION_DLY 1000000
309
310/* Value for ChipClockCSR during initial setup */
311#define BRCMF_INIT_CLKCTL1 (SBSDIO_FORCE_HW_CLKREQ_OFF | \
312 SBSDIO_ALP_AVAIL_REQ)
313
314/* Flags for SDH calls */
315#define F2SYNC (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
316
Arend van Spriel52e14092012-02-09 21:09:09 +0100317#define BRCMF_SDIO_FW_NAME "brcm/brcmfmac-sdio.bin"
318#define BRCMF_SDIO_NV_NAME "brcm/brcmfmac-sdio.txt"
319MODULE_FIRMWARE(BRCMF_SDIO_FW_NAME);
320MODULE_FIRMWARE(BRCMF_SDIO_NV_NAME);
Franky Lin8dd939c2011-11-22 17:21:41 -0800321
Franky Lin382a9e02011-12-16 18:37:18 -0800322#define BRCMF_IDLE_IMMEDIATE (-1) /* Enter idle immediately */
323#define BRCMF_IDLE_ACTIVE 0 /* Do not request any SD clock change
324 * when idle
325 */
326#define BRCMF_IDLE_INTERVAL 1
327
Arend van Spriel5b435de2011-10-05 13:19:03 +0200328/*
329 * Conversion of 802.1D priority to precedence level
330 */
331static uint prio2prec(u32 prio)
332{
333 return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
334 (prio^2) : prio;
335}
336
Arend van Spriel5b435de2011-10-05 13:19:03 +0200337/* core registers */
338struct sdpcmd_regs {
339 u32 corecontrol; /* 0x00, rev8 */
340 u32 corestatus; /* rev8 */
341 u32 PAD[1];
342 u32 biststatus; /* rev8 */
343
344 /* PCMCIA access */
345 u16 pcmciamesportaladdr; /* 0x010, rev8 */
346 u16 PAD[1];
347 u16 pcmciamesportalmask; /* rev8 */
348 u16 PAD[1];
349 u16 pcmciawrframebc; /* rev8 */
350 u16 PAD[1];
351 u16 pcmciaunderflowtimer; /* rev8 */
352 u16 PAD[1];
353
354 /* interrupt */
355 u32 intstatus; /* 0x020, rev8 */
356 u32 hostintmask; /* rev8 */
357 u32 intmask; /* rev8 */
358 u32 sbintstatus; /* rev8 */
359 u32 sbintmask; /* rev8 */
360 u32 funcintmask; /* rev4 */
361 u32 PAD[2];
362 u32 tosbmailbox; /* 0x040, rev8 */
363 u32 tohostmailbox; /* rev8 */
364 u32 tosbmailboxdata; /* rev8 */
365 u32 tohostmailboxdata; /* rev8 */
366
367 /* synchronized access to registers in SDIO clock domain */
368 u32 sdioaccess; /* 0x050, rev8 */
369 u32 PAD[3];
370
371 /* PCMCIA frame control */
372 u8 pcmciaframectrl; /* 0x060, rev8 */
373 u8 PAD[3];
374 u8 pcmciawatermark; /* rev8 */
375 u8 PAD[155];
376
377 /* interrupt batching control */
378 u32 intrcvlazy; /* 0x100, rev8 */
379 u32 PAD[3];
380
381 /* counters */
382 u32 cmd52rd; /* 0x110, rev8 */
383 u32 cmd52wr; /* rev8 */
384 u32 cmd53rd; /* rev8 */
385 u32 cmd53wr; /* rev8 */
386 u32 abort; /* rev8 */
387 u32 datacrcerror; /* rev8 */
388 u32 rdoutofsync; /* rev8 */
389 u32 wroutofsync; /* rev8 */
390 u32 writebusy; /* rev8 */
391 u32 readwait; /* rev8 */
392 u32 readterm; /* rev8 */
393 u32 writeterm; /* rev8 */
394 u32 PAD[40];
395 u32 clockctlstatus; /* rev8 */
396 u32 PAD[7];
397
398 u32 PAD[128]; /* DMA engines */
399
400 /* SDIO/PCMCIA CIS region */
401 char cis[512]; /* 0x400-0x5ff, rev6 */
402
403 /* PCMCIA function control registers */
404 char pcmciafcr[256]; /* 0x600-6ff, rev6 */
405 u16 PAD[55];
406
407 /* PCMCIA backplane access */
408 u16 backplanecsr; /* 0x76E, rev6 */
409 u16 backplaneaddr0; /* rev6 */
410 u16 backplaneaddr1; /* rev6 */
411 u16 backplaneaddr2; /* rev6 */
412 u16 backplaneaddr3; /* rev6 */
413 u16 backplanedata0; /* rev6 */
414 u16 backplanedata1; /* rev6 */
415 u16 backplanedata2; /* rev6 */
416 u16 backplanedata3; /* rev6 */
417 u16 PAD[31];
418
419 /* sprom "size" & "blank" info */
420 u16 spromstatus; /* 0x7BE, rev2 */
421 u32 PAD[464];
422
423 u16 PAD[0x80];
424};
425
Joe Perches8ae74652012-01-15 00:38:38 -0800426#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +0200427/* Device console log buffer state */
428struct brcmf_console {
429 uint count; /* Poll interval msec counter */
430 uint log_addr; /* Log struct address (fixed) */
431 struct rte_log_le log_le; /* Log struct (host copy) */
432 uint bufsize; /* Size of log buffer */
433 u8 *buf; /* Log buffer (host copy) */
434 uint last; /* Last buffer read index */
435};
Arend van Spriel4fc0d012012-06-14 12:16:57 +0200436
437struct brcmf_trap_info {
438 __le32 type;
439 __le32 epc;
440 __le32 cpsr;
441 __le32 spsr;
442 __le32 r0; /* a1 */
443 __le32 r1; /* a2 */
444 __le32 r2; /* a3 */
445 __le32 r3; /* a4 */
446 __le32 r4; /* v1 */
447 __le32 r5; /* v2 */
448 __le32 r6; /* v3 */
449 __le32 r7; /* v4 */
450 __le32 r8; /* v5 */
451 __le32 r9; /* sb/v6 */
452 __le32 r10; /* sl/v7 */
453 __le32 r11; /* fp/v8 */
454 __le32 r12; /* ip */
455 __le32 r13; /* sp */
456 __le32 r14; /* lr */
457 __le32 pc; /* r15 */
458};
Joe Perches8ae74652012-01-15 00:38:38 -0800459#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200460
461struct sdpcm_shared {
462 u32 flags;
463 u32 trap_addr;
464 u32 assert_exp_addr;
465 u32 assert_file_addr;
466 u32 assert_line;
467 u32 console_addr; /* Address of struct rte_console */
468 u32 msgtrace_addr;
469 u8 tag[32];
Arend van Spriel4fc0d012012-06-14 12:16:57 +0200470 u32 brpt_addr;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200471};
472
473struct sdpcm_shared_le {
474 __le32 flags;
475 __le32 trap_addr;
476 __le32 assert_exp_addr;
477 __le32 assert_file_addr;
478 __le32 assert_line;
479 __le32 console_addr; /* Address of struct rte_console */
480 __le32 msgtrace_addr;
481 u8 tag[32];
Arend van Spriel4fc0d012012-06-14 12:16:57 +0200482 __le32 brpt_addr;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200483};
484
485
486/* misc chip info needed by some of the routines */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200487/* Private data for SDIO bus interaction */
Franky Line92eedf2011-11-22 17:21:50 -0800488struct brcmf_sdio {
Arend van Spriel5b435de2011-10-05 13:19:03 +0200489 struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
490 struct chip_info *ci; /* Chip info struct */
491 char *vars; /* Variables (from CIS and/or other) */
492 uint varsz; /* Size of variables buffer */
493
494 u32 ramsize; /* Size of RAM in SOCRAM (bytes) */
495
496 u32 hostintmask; /* Copy of Host Interrupt Mask */
497 u32 intstatus; /* Intstatus bits (events) pending */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200498 bool fcstate; /* State of dongle flow-control */
499
500 uint blocksize; /* Block size of SDIO transfers */
501 uint roundup; /* Max roundup limit */
502
503 struct pktq txq; /* Queue length used for flow-control */
504 u8 flowcontrol; /* per prio flow control bitmask */
505 u8 tx_seq; /* Transmit sequence number (next) */
506 u8 tx_max; /* Maximum transmit sequence allowed */
507
508 u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN];
509 u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */
510 u16 nextlen; /* Next Read Len from last header */
511 u8 rx_seq; /* Receive sequence number (expected) */
512 bool rxskip; /* Skip receive (awaiting NAK ACK) */
513
514 uint rxbound; /* Rx frames to read before resched */
515 uint txbound; /* Tx frames to send before resched */
516 uint txminmax;
517
518 struct sk_buff *glomd; /* Packet containing glomming descriptor */
Arend van Sprielb83db862011-10-19 12:51:09 +0200519 struct sk_buff_head glom; /* Packet list for glommed superframe */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200520 uint glomerr; /* Glom packet read errors */
521
522 u8 *rxbuf; /* Buffer for receiving control packets */
523 uint rxblen; /* Allocated length of rxbuf */
524 u8 *rxctl; /* Aligned pointer into rxbuf */
525 u8 *databuf; /* Buffer for receiving big glom packet */
526 u8 *dataptr; /* Aligned pointer into databuf */
527 uint rxlen; /* Length of valid data in buffer */
528
529 u8 sdpcm_ver; /* Bus protocol reported by dongle */
530
531 bool intr; /* Use interrupts */
532 bool poll; /* Use polling */
Franky Lin1d382272012-09-13 21:11:59 +0200533 atomic_t ipend; /* Device interrupt is pending */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200534 uint spurious; /* Count of spurious interrupts */
535 uint pollrate; /* Ticks between device polls */
536 uint polltick; /* Tick counter */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200537
Joe Perches8ae74652012-01-15 00:38:38 -0800538#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +0200539 uint console_interval;
540 struct brcmf_console console; /* Console output polling support */
541 uint console_addr; /* Console address from shared struct */
Joe Perches8ae74652012-01-15 00:38:38 -0800542#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200543
Arend van Spriel5b435de2011-10-05 13:19:03 +0200544 uint clkstate; /* State of sd and backplane clock(s) */
545 bool activity; /* Activity flag for clock down */
546 s32 idletime; /* Control for activity timeout */
547 s32 idlecount; /* Activity timeout counter */
548 s32 idleclock; /* How to set bus driver when idle */
549 s32 sd_rxchain;
550 bool use_rxchain; /* If brcmf should use PKT chains */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200551 bool rxflow_mode; /* Rx flow control mode */
552 bool rxflow; /* Is rx flow control on */
553 bool alp_only; /* Don't use HT clock (ALP only) */
554/* Field to decide if rx of control frames happen in rxbuf or lb-pool */
555 bool usebufpool;
556
Arend van Spriel5b435de2011-10-05 13:19:03 +0200557 u8 *ctrl_frame_buf;
558 u32 ctrl_frame_len;
559 bool ctrl_frame_stat;
560
561 spinlock_t txqlock;
562 wait_queue_head_t ctrl_wait;
563 wait_queue_head_t dcmd_resp_wait;
564
565 struct timer_list timer;
566 struct completion watchdog_wait;
567 struct task_struct *watchdog_tsk;
568 bool wd_timer_valid;
569 uint save_ms;
570
Franky Linf1e68c22012-09-13 21:12:00 +0200571 struct workqueue_struct *brcmf_wq;
572 struct work_struct datawork;
Franky Linb948a852012-04-23 14:24:53 -0700573 struct list_head dpc_tsklst;
574 spinlock_t dpc_tl_lock;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200575
576 struct semaphore sdsem;
577
Arend van Spriel5b435de2011-10-05 13:19:03 +0200578 const struct firmware *firmware;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200579 u32 fw_ptr;
Franky Linc8bf3482011-12-16 18:37:08 -0800580
581 bool txoff; /* Transmit flow-controlled */
Arend van Spriel80969832012-06-09 22:51:44 +0200582 struct brcmf_sdio_count sdcnt;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200583};
584
Arend van Spriel5b435de2011-10-05 13:19:03 +0200585/* clkstate */
586#define CLK_NONE 0
587#define CLK_SDONLY 1
588#define CLK_PENDING 2 /* Not used yet */
589#define CLK_AVAIL 3
590
Joe Perches8ae74652012-01-15 00:38:38 -0800591#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +0200592static int qcount[NUMPRIO];
593static int tx_packets[NUMPRIO];
Joe Perches8ae74652012-01-15 00:38:38 -0800594#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200595
596#define SDIO_DRIVE_STRENGTH 6 /* in milliamps */
597
598#define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
599
600/* Retry count for register access failures */
601static const uint retry_limit = 2;
602
603/* Limit on rounding up frames */
604static const uint max_roundup = 512;
605
606#define ALIGNMENT 4
607
608static void pkt_align(struct sk_buff *p, int len, int align)
609{
610 uint datalign;
611 datalign = (unsigned long)(p->data);
612 datalign = roundup(datalign, (align)) - datalign;
613 if (datalign)
614 skb_pull(p, datalign);
615 __skb_trim(p, len);
616}
617
618/* To check if there's window offered */
Franky Line92eedf2011-11-22 17:21:50 -0800619static bool data_ok(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200620{
621 return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
622 ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
623}
624
625/*
626 * Reads a register in the SDIO hardware block. This block occupies a series of
627 * adresses on the 32 bit backplane bus.
628 */
Franky Lin58692752012-05-04 18:27:36 -0700629static int
630r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200631{
Franky Lin99ba15c2011-11-04 22:23:42 +0100632 u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
Franky Lin79ae3952012-05-04 18:27:34 -0700633 int ret;
Franky Lin58692752012-05-04 18:27:36 -0700634
635 *regvar = brcmf_sdio_regrl(bus->sdiodev,
636 bus->ci->c_inf[idx].base + offset, &ret);
637
638 return ret;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200639}
640
Franky Lin58692752012-05-04 18:27:36 -0700641static int
642w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200643{
Franky Lin99ba15c2011-11-04 22:23:42 +0100644 u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
Franky Line13ce262012-05-04 18:27:35 -0700645 int ret;
Franky Lin58692752012-05-04 18:27:36 -0700646
647 brcmf_sdio_regwl(bus->sdiodev,
648 bus->ci->c_inf[idx].base + reg_offset,
649 regval, &ret);
650
651 return ret;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200652}
653
654#define PKT_AVAILABLE() (intstatus & I_HMB_FRAME_IND)
655
656#define HOSTINTMASK (I_HMB_SW_MASK | I_CHIPACTIVE)
657
658/* Packet free applicable unconditionally for sdio and sdspi.
659 * Conditional if bufpool was present for gspi bus.
660 */
Franky Line92eedf2011-11-22 17:21:50 -0800661static void brcmf_sdbrcm_pktfree2(struct brcmf_sdio *bus, struct sk_buff *pkt)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200662{
663 if (bus->usebufpool)
664 brcmu_pkt_buf_free_skb(pkt);
665}
666
667/* Turn backplane clock on or off */
Franky Line92eedf2011-11-22 17:21:50 -0800668static int brcmf_sdbrcm_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200669{
670 int err;
671 u8 clkctl, clkreq, devctl;
672 unsigned long timeout;
673
674 brcmf_dbg(TRACE, "Enter\n");
675
676 clkctl = 0;
677
678 if (on) {
679 /* Request HT Avail */
680 clkreq =
681 bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
682
Franky Lin3bba8292012-05-04 18:27:33 -0700683 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
684 clkreq, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200685 if (err) {
686 brcmf_dbg(ERROR, "HT Avail request error: %d\n", err);
687 return -EBADE;
688 }
689
Arend van Spriel5b435de2011-10-05 13:19:03 +0200690 /* Check current status */
Franky Lin45db3392012-05-04 18:27:32 -0700691 clkctl = brcmf_sdio_regrb(bus->sdiodev,
692 SBSDIO_FUNC1_CHIPCLKCSR, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200693 if (err) {
694 brcmf_dbg(ERROR, "HT Avail read error: %d\n", err);
695 return -EBADE;
696 }
697
698 /* Go to pending and await interrupt if appropriate */
699 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
700 /* Allow only clock-available interrupt */
Franky Lin45db3392012-05-04 18:27:32 -0700701 devctl = brcmf_sdio_regrb(bus->sdiodev,
702 SBSDIO_DEVICE_CTL, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200703 if (err) {
704 brcmf_dbg(ERROR, "Devctl error setting CA: %d\n",
705 err);
706 return -EBADE;
707 }
708
709 devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
Franky Lin3bba8292012-05-04 18:27:33 -0700710 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
711 devctl, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200712 brcmf_dbg(INFO, "CLKCTL: set PENDING\n");
713 bus->clkstate = CLK_PENDING;
714
715 return 0;
716 } else if (bus->clkstate == CLK_PENDING) {
717 /* Cancel CA-only interrupt filter */
Franky Lin45db3392012-05-04 18:27:32 -0700718 devctl = brcmf_sdio_regrb(bus->sdiodev,
Arend van Spriel5b435de2011-10-05 13:19:03 +0200719 SBSDIO_DEVICE_CTL, &err);
720 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
Franky Lin3bba8292012-05-04 18:27:33 -0700721 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
722 devctl, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200723 }
724
725 /* Otherwise, wait here (polling) for HT Avail */
726 timeout = jiffies +
727 msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
728 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
Franky Lin45db3392012-05-04 18:27:32 -0700729 clkctl = brcmf_sdio_regrb(bus->sdiodev,
730 SBSDIO_FUNC1_CHIPCLKCSR,
731 &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200732 if (time_after(jiffies, timeout))
733 break;
734 else
735 usleep_range(5000, 10000);
736 }
737 if (err) {
738 brcmf_dbg(ERROR, "HT Avail request error: %d\n", err);
739 return -EBADE;
740 }
741 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
742 brcmf_dbg(ERROR, "HT Avail timeout (%d): clkctl 0x%02x\n",
743 PMU_MAX_TRANSITION_DLY, clkctl);
744 return -EBADE;
745 }
746
747 /* Mark clock available */
748 bus->clkstate = CLK_AVAIL;
749 brcmf_dbg(INFO, "CLKCTL: turned ON\n");
750
Joe Perches8ae74652012-01-15 00:38:38 -0800751#if defined(DEBUG)
Joe Perches23677ce2012-02-09 11:17:23 +0000752 if (!bus->alp_only) {
Arend van Spriel5b435de2011-10-05 13:19:03 +0200753 if (SBSDIO_ALPONLY(clkctl))
754 brcmf_dbg(ERROR, "HT Clock should be on\n");
755 }
Joe Perches8ae74652012-01-15 00:38:38 -0800756#endif /* defined (DEBUG) */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200757
758 bus->activity = true;
759 } else {
760 clkreq = 0;
761
762 if (bus->clkstate == CLK_PENDING) {
763 /* Cancel CA-only interrupt filter */
Franky Lin45db3392012-05-04 18:27:32 -0700764 devctl = brcmf_sdio_regrb(bus->sdiodev,
765 SBSDIO_DEVICE_CTL, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200766 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
Franky Lin3bba8292012-05-04 18:27:33 -0700767 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
768 devctl, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200769 }
770
771 bus->clkstate = CLK_SDONLY;
Franky Lin3bba8292012-05-04 18:27:33 -0700772 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
773 clkreq, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +0200774 brcmf_dbg(INFO, "CLKCTL: turned OFF\n");
775 if (err) {
776 brcmf_dbg(ERROR, "Failed access turning clock off: %d\n",
777 err);
778 return -EBADE;
779 }
780 }
781 return 0;
782}
783
784/* Change idle/active SD state */
Franky Line92eedf2011-11-22 17:21:50 -0800785static int brcmf_sdbrcm_sdclk(struct brcmf_sdio *bus, bool on)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200786{
787 brcmf_dbg(TRACE, "Enter\n");
788
789 if (on)
790 bus->clkstate = CLK_SDONLY;
791 else
792 bus->clkstate = CLK_NONE;
793
794 return 0;
795}
796
797/* Transition SD and backplane clock readiness */
Franky Line92eedf2011-11-22 17:21:50 -0800798static int brcmf_sdbrcm_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200799{
Joe Perches8ae74652012-01-15 00:38:38 -0800800#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +0200801 uint oldstate = bus->clkstate;
Joe Perches8ae74652012-01-15 00:38:38 -0800802#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200803
804 brcmf_dbg(TRACE, "Enter\n");
805
806 /* Early exit if we're already there */
807 if (bus->clkstate == target) {
808 if (target == CLK_AVAIL) {
809 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
810 bus->activity = true;
811 }
812 return 0;
813 }
814
815 switch (target) {
816 case CLK_AVAIL:
817 /* Make sure SD clock is available */
818 if (bus->clkstate == CLK_NONE)
819 brcmf_sdbrcm_sdclk(bus, true);
820 /* Now request HT Avail on the backplane */
821 brcmf_sdbrcm_htclk(bus, true, pendok);
822 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
823 bus->activity = true;
824 break;
825
826 case CLK_SDONLY:
827 /* Remove HT request, or bring up SD clock */
828 if (bus->clkstate == CLK_NONE)
829 brcmf_sdbrcm_sdclk(bus, true);
830 else if (bus->clkstate == CLK_AVAIL)
831 brcmf_sdbrcm_htclk(bus, false, false);
832 else
833 brcmf_dbg(ERROR, "request for %d -> %d\n",
834 bus->clkstate, target);
835 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
836 break;
837
838 case CLK_NONE:
839 /* Make sure to remove HT request */
840 if (bus->clkstate == CLK_AVAIL)
841 brcmf_sdbrcm_htclk(bus, false, false);
842 /* Now remove the SD clock */
843 brcmf_sdbrcm_sdclk(bus, false);
844 brcmf_sdbrcm_wd_timer(bus, 0);
845 break;
846 }
Joe Perches8ae74652012-01-15 00:38:38 -0800847#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +0200848 brcmf_dbg(INFO, "%d -> %d\n", oldstate, bus->clkstate);
Joe Perches8ae74652012-01-15 00:38:38 -0800849#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +0200850
851 return 0;
852}
853
Franky Line92eedf2011-11-22 17:21:50 -0800854static u32 brcmf_sdbrcm_hostmail(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200855{
856 u32 intstatus = 0;
857 u32 hmb_data;
858 u8 fcbits;
Franky Lin58692752012-05-04 18:27:36 -0700859 int ret;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200860
861 brcmf_dbg(TRACE, "Enter\n");
862
863 /* Read mailbox data and ack that we did so */
Franky Lin58692752012-05-04 18:27:36 -0700864 ret = r_sdreg32(bus, &hmb_data,
865 offsetof(struct sdpcmd_regs, tohostmailboxdata));
Arend van Spriel5b435de2011-10-05 13:19:03 +0200866
Franky Lin58692752012-05-04 18:27:36 -0700867 if (ret == 0)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200868 w_sdreg32(bus, SMB_INT_ACK,
Franky Lin58692752012-05-04 18:27:36 -0700869 offsetof(struct sdpcmd_regs, tosbmailbox));
Arend van Spriel80969832012-06-09 22:51:44 +0200870 bus->sdcnt.f1regdata += 2;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200871
872 /* Dongle recomposed rx frames, accept them again */
873 if (hmb_data & HMB_DATA_NAKHANDLED) {
874 brcmf_dbg(INFO, "Dongle reports NAK handled, expect rtx of %d\n",
875 bus->rx_seq);
876 if (!bus->rxskip)
877 brcmf_dbg(ERROR, "unexpected NAKHANDLED!\n");
878
879 bus->rxskip = false;
880 intstatus |= I_HMB_FRAME_IND;
881 }
882
883 /*
884 * DEVREADY does not occur with gSPI.
885 */
886 if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
887 bus->sdpcm_ver =
888 (hmb_data & HMB_DATA_VERSION_MASK) >>
889 HMB_DATA_VERSION_SHIFT;
890 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
891 brcmf_dbg(ERROR, "Version mismatch, dongle reports %d, "
892 "expecting %d\n",
893 bus->sdpcm_ver, SDPCM_PROT_VERSION);
894 else
895 brcmf_dbg(INFO, "Dongle ready, protocol version %d\n",
896 bus->sdpcm_ver);
897 }
898
899 /*
900 * Flow Control has been moved into the RX headers and this out of band
901 * method isn't used any more.
902 * remaining backward compatible with older dongles.
903 */
904 if (hmb_data & HMB_DATA_FC) {
905 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
906 HMB_DATA_FCDATA_SHIFT;
907
908 if (fcbits & ~bus->flowcontrol)
Arend van Spriel80969832012-06-09 22:51:44 +0200909 bus->sdcnt.fc_xoff++;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200910
911 if (bus->flowcontrol & ~fcbits)
Arend van Spriel80969832012-06-09 22:51:44 +0200912 bus->sdcnt.fc_xon++;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200913
Arend van Spriel80969832012-06-09 22:51:44 +0200914 bus->sdcnt.fc_rcvd++;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200915 bus->flowcontrol = fcbits;
916 }
917
918 /* Shouldn't be any others */
919 if (hmb_data & ~(HMB_DATA_DEVREADY |
920 HMB_DATA_NAKHANDLED |
921 HMB_DATA_FC |
922 HMB_DATA_FWREADY |
923 HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
924 brcmf_dbg(ERROR, "Unknown mailbox data content: 0x%02x\n",
925 hmb_data);
926
927 return intstatus;
928}
929
Franky Line92eedf2011-11-22 17:21:50 -0800930static void brcmf_sdbrcm_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200931{
932 uint retries = 0;
933 u16 lastrbc;
934 u8 hi, lo;
935 int err;
936
937 brcmf_dbg(ERROR, "%sterminate frame%s\n",
938 abort ? "abort command, " : "",
939 rtx ? ", send NAK" : "");
940
941 if (abort)
942 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
943
Franky Lin3bba8292012-05-04 18:27:33 -0700944 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
945 SFC_RF_TERM, &err);
Arend van Spriel80969832012-06-09 22:51:44 +0200946 bus->sdcnt.f1regdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200947
948 /* Wait until the packet has been flushed (device/FIFO stable) */
949 for (lastrbc = retries = 0xffff; retries > 0; retries--) {
Franky Lin45db3392012-05-04 18:27:32 -0700950 hi = brcmf_sdio_regrb(bus->sdiodev,
Franky Lin5c15c232012-05-04 18:27:37 -0700951 SBSDIO_FUNC1_RFRAMEBCHI, &err);
Franky Lin45db3392012-05-04 18:27:32 -0700952 lo = brcmf_sdio_regrb(bus->sdiodev,
Franky Lin5c15c232012-05-04 18:27:37 -0700953 SBSDIO_FUNC1_RFRAMEBCLO, &err);
Arend van Spriel80969832012-06-09 22:51:44 +0200954 bus->sdcnt.f1regdata += 2;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200955
956 if ((hi == 0) && (lo == 0))
957 break;
958
959 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
960 brcmf_dbg(ERROR, "count growing: last 0x%04x now 0x%04x\n",
961 lastrbc, (hi << 8) + lo);
962 }
963 lastrbc = (hi << 8) + lo;
964 }
965
966 if (!retries)
967 brcmf_dbg(ERROR, "count never zeroed: last 0x%04x\n", lastrbc);
968 else
969 brcmf_dbg(INFO, "flush took %d iterations\n", 0xffff - retries);
970
971 if (rtx) {
Arend van Spriel80969832012-06-09 22:51:44 +0200972 bus->sdcnt.rxrtx++;
Franky Lin58692752012-05-04 18:27:36 -0700973 err = w_sdreg32(bus, SMB_NAK,
974 offsetof(struct sdpcmd_regs, tosbmailbox));
Arend van Spriel5b435de2011-10-05 13:19:03 +0200975
Arend van Spriel80969832012-06-09 22:51:44 +0200976 bus->sdcnt.f1regdata++;
Franky Lin58692752012-05-04 18:27:36 -0700977 if (err == 0)
Arend van Spriel5b435de2011-10-05 13:19:03 +0200978 bus->rxskip = true;
979 }
980
981 /* Clear partial in any case */
982 bus->nextlen = 0;
983
984 /* If we can't reach the device, signal failure */
Franky Lin5c15c232012-05-04 18:27:37 -0700985 if (err)
Franky Lin712ac5b2011-12-16 18:37:09 -0800986 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
Arend van Spriel5b435de2011-10-05 13:19:03 +0200987}
988
Arend van Spriel20e5ca12011-10-18 14:03:09 +0200989/* copy a buffer into a pkt buffer chain */
Franky Line92eedf2011-11-22 17:21:50 -0800990static uint brcmf_sdbrcm_glom_from_buf(struct brcmf_sdio *bus, uint len)
Arend van Spriel20e5ca12011-10-18 14:03:09 +0200991{
992 uint n, ret = 0;
993 struct sk_buff *p;
994 u8 *buf;
995
Arend van Spriel20e5ca12011-10-18 14:03:09 +0200996 buf = bus->dataptr;
997
998 /* copy the data */
Arend van Sprielb83db862011-10-19 12:51:09 +0200999 skb_queue_walk(&bus->glom, p) {
Arend van Spriel20e5ca12011-10-18 14:03:09 +02001000 n = min_t(uint, p->len, len);
1001 memcpy(p->data, buf, n);
1002 buf += n;
1003 len -= n;
1004 ret += n;
Arend van Sprielb83db862011-10-19 12:51:09 +02001005 if (!len)
1006 break;
Arend van Spriel20e5ca12011-10-18 14:03:09 +02001007 }
1008
1009 return ret;
1010}
1011
Arend van Spriel9a95e602011-11-10 20:30:29 +01001012/* return total length of buffer chain */
Franky Line92eedf2011-11-22 17:21:50 -08001013static uint brcmf_sdbrcm_glom_len(struct brcmf_sdio *bus)
Arend van Spriel9a95e602011-11-10 20:30:29 +01001014{
1015 struct sk_buff *p;
1016 uint total;
1017
1018 total = 0;
1019 skb_queue_walk(&bus->glom, p)
1020 total += p->len;
1021 return total;
1022}
1023
Franky Line92eedf2011-11-22 17:21:50 -08001024static void brcmf_sdbrcm_free_glom(struct brcmf_sdio *bus)
Arend van Spriel046808d2011-11-10 20:30:31 +01001025{
1026 struct sk_buff *cur, *next;
1027
1028 skb_queue_walk_safe(&bus->glom, cur, next) {
1029 skb_unlink(cur, &bus->glom);
1030 brcmu_pkt_buf_free_skb(cur);
1031 }
1032}
1033
Franky Line92eedf2011-11-22 17:21:50 -08001034static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
Arend van Spriel5b435de2011-10-05 13:19:03 +02001035{
1036 u16 dlen, totlen;
1037 u8 *dptr, num = 0;
1038
1039 u16 sublen, check;
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001040 struct sk_buff *pfirst, *pnext;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001041
1042 int errcode;
1043 u8 chan, seq, doff, sfdoff;
1044 u8 txmax;
1045
1046 int ifidx = 0;
1047 bool usechain = bus->use_rxchain;
1048
1049 /* If packets, issue read(s) and send up packet chain */
1050 /* Return sequence numbers consumed? */
1051
Arend van Sprielb83db862011-10-19 12:51:09 +02001052 brcmf_dbg(TRACE, "start: glomd %p glom %p\n",
1053 bus->glomd, skb_peek(&bus->glom));
Arend van Spriel5b435de2011-10-05 13:19:03 +02001054
1055 /* If there's a descriptor, generate the packet chain */
1056 if (bus->glomd) {
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001057 pfirst = pnext = NULL;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001058 dlen = (u16) (bus->glomd->len);
1059 dptr = bus->glomd->data;
1060 if (!dlen || (dlen & 1)) {
1061 brcmf_dbg(ERROR, "bad glomd len(%d), ignore descriptor\n",
1062 dlen);
1063 dlen = 0;
1064 }
1065
1066 for (totlen = num = 0; dlen; num++) {
1067 /* Get (and move past) next length */
1068 sublen = get_unaligned_le16(dptr);
1069 dlen -= sizeof(u16);
1070 dptr += sizeof(u16);
1071 if ((sublen < SDPCM_HDRLEN) ||
1072 ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1073 brcmf_dbg(ERROR, "descriptor len %d bad: %d\n",
1074 num, sublen);
1075 pnext = NULL;
1076 break;
1077 }
1078 if (sublen % BRCMF_SDALIGN) {
1079 brcmf_dbg(ERROR, "sublen %d not multiple of %d\n",
1080 sublen, BRCMF_SDALIGN);
1081 usechain = false;
1082 }
1083 totlen += sublen;
1084
1085 /* For last frame, adjust read len so total
1086 is a block multiple */
1087 if (!dlen) {
1088 sublen +=
1089 (roundup(totlen, bus->blocksize) - totlen);
1090 totlen = roundup(totlen, bus->blocksize);
1091 }
1092
1093 /* Allocate/chain packet for next subframe */
1094 pnext = brcmu_pkt_buf_get_skb(sublen + BRCMF_SDALIGN);
1095 if (pnext == NULL) {
1096 brcmf_dbg(ERROR, "bcm_pkt_buf_get_skb failed, num %d len %d\n",
1097 num, sublen);
1098 break;
1099 }
Arend van Sprielb83db862011-10-19 12:51:09 +02001100 skb_queue_tail(&bus->glom, pnext);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001101
1102 /* Adhere to start alignment requirements */
1103 pkt_align(pnext, sublen, BRCMF_SDALIGN);
1104 }
1105
1106 /* If all allocations succeeded, save packet chain
1107 in bus structure */
1108 if (pnext) {
1109 brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1110 totlen, num);
1111 if (BRCMF_GLOM_ON() && bus->nextlen &&
1112 totlen != bus->nextlen) {
1113 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1114 bus->nextlen, totlen, rxseq);
1115 }
Arend van Spriel5b435de2011-10-05 13:19:03 +02001116 pfirst = pnext = NULL;
1117 } else {
Arend van Spriel046808d2011-11-10 20:30:31 +01001118 brcmf_sdbrcm_free_glom(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001119 num = 0;
1120 }
1121
1122 /* Done with descriptor packet */
1123 brcmu_pkt_buf_free_skb(bus->glomd);
1124 bus->glomd = NULL;
1125 bus->nextlen = 0;
1126 }
1127
1128 /* Ok -- either we just generated a packet chain,
1129 or had one from before */
Arend van Sprielb83db862011-10-19 12:51:09 +02001130 if (!skb_queue_empty(&bus->glom)) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001131 if (BRCMF_GLOM_ON()) {
1132 brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
Arend van Sprielb83db862011-10-19 12:51:09 +02001133 skb_queue_walk(&bus->glom, pnext) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001134 brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n",
1135 pnext, (u8 *) (pnext->data),
1136 pnext->len, pnext->len);
1137 }
1138 }
1139
Arend van Sprielb83db862011-10-19 12:51:09 +02001140 pfirst = skb_peek(&bus->glom);
Arend van Spriel9a95e602011-11-10 20:30:29 +01001141 dlen = (u16) brcmf_sdbrcm_glom_len(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001142
1143 /* Do an SDIO read for the superframe. Configurable iovar to
1144 * read directly into the chained packet, or allocate a large
1145 * packet and and copy into the chain.
1146 */
1147 if (usechain) {
Arend van Spriel5adfeb62011-11-22 17:21:38 -08001148 errcode = brcmf_sdcard_recv_chain(bus->sdiodev,
Arend van Spriel5b435de2011-10-05 13:19:03 +02001149 bus->sdiodev->sbwad,
Arend van Spriel5adfeb62011-11-22 17:21:38 -08001150 SDIO_FUNC_2, F2SYNC, &bus->glom);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001151 } else if (bus->dataptr) {
1152 errcode = brcmf_sdcard_recv_buf(bus->sdiodev,
1153 bus->sdiodev->sbwad,
Arend van Spriel5adfeb62011-11-22 17:21:38 -08001154 SDIO_FUNC_2, F2SYNC,
1155 bus->dataptr, dlen);
Arend van Spriel20e5ca12011-10-18 14:03:09 +02001156 sublen = (u16) brcmf_sdbrcm_glom_from_buf(bus, dlen);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001157 if (sublen != dlen) {
1158 brcmf_dbg(ERROR, "FAILED TO COPY, dlen %d sublen %d\n",
1159 dlen, sublen);
1160 errcode = -1;
1161 }
1162 pnext = NULL;
1163 } else {
1164 brcmf_dbg(ERROR, "COULDN'T ALLOC %d-BYTE GLOM, FORCE FAILURE\n",
1165 dlen);
1166 errcode = -1;
1167 }
Arend van Spriel80969832012-06-09 22:51:44 +02001168 bus->sdcnt.f2rxdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001169
1170 /* On failure, kill the superframe, allow a couple retries */
1171 if (errcode < 0) {
1172 brcmf_dbg(ERROR, "glom read of %d bytes failed: %d\n",
1173 dlen, errcode);
Franky Lin719f2732011-12-16 18:37:06 -08001174 bus->sdiodev->bus_if->dstats.rx_errors++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001175
1176 if (bus->glomerr++ < 3) {
1177 brcmf_sdbrcm_rxfail(bus, true, true);
1178 } else {
1179 bus->glomerr = 0;
1180 brcmf_sdbrcm_rxfail(bus, true, false);
Arend van Spriel80969832012-06-09 22:51:44 +02001181 bus->sdcnt.rxglomfail++;
Arend van Spriel046808d2011-11-10 20:30:31 +01001182 brcmf_sdbrcm_free_glom(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001183 }
1184 return 0;
1185 }
Joe Perches1e023822012-01-15 00:38:40 -08001186
1187 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1188 pfirst->data, min_t(int, pfirst->len, 48),
1189 "SUPERFRAME:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02001190
1191 /* Validate the superframe header */
1192 dptr = (u8 *) (pfirst->data);
1193 sublen = get_unaligned_le16(dptr);
1194 check = get_unaligned_le16(dptr + sizeof(u16));
1195
1196 chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]);
1197 seq = SDPCM_PACKET_SEQUENCE(&dptr[SDPCM_FRAMETAG_LEN]);
1198 bus->nextlen = dptr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
1199 if ((bus->nextlen << 4) > MAX_RX_DATASZ) {
1200 brcmf_dbg(INFO, "nextlen too large (%d) seq %d\n",
1201 bus->nextlen, seq);
1202 bus->nextlen = 0;
1203 }
1204 doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1205 txmax = SDPCM_WINDOW_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1206
1207 errcode = 0;
1208 if ((u16)~(sublen ^ check)) {
1209 brcmf_dbg(ERROR, "(superframe): HW hdr error: len/check 0x%04x/0x%04x\n",
1210 sublen, check);
1211 errcode = -1;
1212 } else if (roundup(sublen, bus->blocksize) != dlen) {
1213 brcmf_dbg(ERROR, "(superframe): len 0x%04x, rounded 0x%04x, expect 0x%04x\n",
1214 sublen, roundup(sublen, bus->blocksize),
1215 dlen);
1216 errcode = -1;
1217 } else if (SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]) !=
1218 SDPCM_GLOM_CHANNEL) {
1219 brcmf_dbg(ERROR, "(superframe): bad channel %d\n",
1220 SDPCM_PACKET_CHANNEL(
1221 &dptr[SDPCM_FRAMETAG_LEN]));
1222 errcode = -1;
1223 } else if (SDPCM_GLOMDESC(&dptr[SDPCM_FRAMETAG_LEN])) {
1224 brcmf_dbg(ERROR, "(superframe): got 2nd descriptor?\n");
1225 errcode = -1;
1226 } else if ((doff < SDPCM_HDRLEN) ||
1227 (doff > (pfirst->len - SDPCM_HDRLEN))) {
1228 brcmf_dbg(ERROR, "(superframe): Bad data offset %d: HW %d pkt %d min %d\n",
1229 doff, sublen, pfirst->len, SDPCM_HDRLEN);
1230 errcode = -1;
1231 }
1232
1233 /* Check sequence number of superframe SW header */
1234 if (rxseq != seq) {
1235 brcmf_dbg(INFO, "(superframe) rx_seq %d, expected %d\n",
1236 seq, rxseq);
Arend van Spriel80969832012-06-09 22:51:44 +02001237 bus->sdcnt.rx_badseq++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001238 rxseq = seq;
1239 }
1240
1241 /* Check window for sanity */
1242 if ((u8) (txmax - bus->tx_seq) > 0x40) {
1243 brcmf_dbg(ERROR, "unlikely tx max %d with tx_seq %d\n",
1244 txmax, bus->tx_seq);
1245 txmax = bus->tx_seq + 2;
1246 }
1247 bus->tx_max = txmax;
1248
1249 /* Remove superframe header, remember offset */
1250 skb_pull(pfirst, doff);
1251 sfdoff = doff;
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001252 num = 0;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001253
1254 /* Validate all the subframe headers */
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001255 skb_queue_walk(&bus->glom, pnext) {
1256 /* leave when invalid subframe is found */
1257 if (errcode)
1258 break;
1259
Arend van Spriel5b435de2011-10-05 13:19:03 +02001260 dptr = (u8 *) (pnext->data);
1261 dlen = (u16) (pnext->len);
1262 sublen = get_unaligned_le16(dptr);
1263 check = get_unaligned_le16(dptr + sizeof(u16));
1264 chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]);
1265 doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
Joe Perches1e023822012-01-15 00:38:40 -08001266 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1267 dptr, 32, "subframe:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02001268
1269 if ((u16)~(sublen ^ check)) {
1270 brcmf_dbg(ERROR, "(subframe %d): HW hdr error: len/check 0x%04x/0x%04x\n",
1271 num, sublen, check);
1272 errcode = -1;
1273 } else if ((sublen > dlen) || (sublen < SDPCM_HDRLEN)) {
1274 brcmf_dbg(ERROR, "(subframe %d): length mismatch: len 0x%04x, expect 0x%04x\n",
1275 num, sublen, dlen);
1276 errcode = -1;
1277 } else if ((chan != SDPCM_DATA_CHANNEL) &&
1278 (chan != SDPCM_EVENT_CHANNEL)) {
1279 brcmf_dbg(ERROR, "(subframe %d): bad channel %d\n",
1280 num, chan);
1281 errcode = -1;
1282 } else if ((doff < SDPCM_HDRLEN) || (doff > sublen)) {
1283 brcmf_dbg(ERROR, "(subframe %d): Bad data offset %d: HW %d min %d\n",
1284 num, doff, sublen, SDPCM_HDRLEN);
1285 errcode = -1;
1286 }
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001287 /* increase the subframe count */
1288 num++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001289 }
1290
1291 if (errcode) {
1292 /* Terminate frame on error, request
1293 a couple retries */
1294 if (bus->glomerr++ < 3) {
1295 /* Restore superframe header space */
1296 skb_push(pfirst, sfdoff);
1297 brcmf_sdbrcm_rxfail(bus, true, true);
1298 } else {
1299 bus->glomerr = 0;
1300 brcmf_sdbrcm_rxfail(bus, true, false);
Arend van Spriel80969832012-06-09 22:51:44 +02001301 bus->sdcnt.rxglomfail++;
Arend van Spriel046808d2011-11-10 20:30:31 +01001302 brcmf_sdbrcm_free_glom(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001303 }
1304 bus->nextlen = 0;
1305 return 0;
1306 }
1307
1308 /* Basic SD framing looks ok - process each packet (header) */
Arend van Spriel5b435de2011-10-05 13:19:03 +02001309
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001310 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001311 dptr = (u8 *) (pfirst->data);
1312 sublen = get_unaligned_le16(dptr);
1313 chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]);
1314 seq = SDPCM_PACKET_SEQUENCE(&dptr[SDPCM_FRAMETAG_LEN]);
1315 doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1316
1317 brcmf_dbg(GLOM, "Get subframe %d, %p(%p/%d), sublen %d chan %d seq %d\n",
1318 num, pfirst, pfirst->data,
1319 pfirst->len, sublen, chan, seq);
1320
1321 /* precondition: chan == SDPCM_DATA_CHANNEL ||
1322 chan == SDPCM_EVENT_CHANNEL */
1323
1324 if (rxseq != seq) {
1325 brcmf_dbg(GLOM, "rx_seq %d, expected %d\n",
1326 seq, rxseq);
Arend van Spriel80969832012-06-09 22:51:44 +02001327 bus->sdcnt.rx_badseq++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001328 rxseq = seq;
1329 }
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001330 rxseq++;
1331
Joe Perches1e023822012-01-15 00:38:40 -08001332 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1333 dptr, dlen, "Rx Subframe Data:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02001334
1335 __skb_trim(pfirst, sublen);
1336 skb_pull(pfirst, doff);
1337
1338 if (pfirst->len == 0) {
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001339 skb_unlink(pfirst, &bus->glom);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001340 brcmu_pkt_buf_free_skb(pfirst);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001341 continue;
Franky Lind5625ee2011-12-16 18:37:01 -08001342 } else if (brcmf_proto_hdrpull(bus->sdiodev->dev,
1343 &ifidx, pfirst) != 0) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001344 brcmf_dbg(ERROR, "rx protocol error\n");
Franky Lin719f2732011-12-16 18:37:06 -08001345 bus->sdiodev->bus_if->dstats.rx_errors++;
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001346 skb_unlink(pfirst, &bus->glom);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001347 brcmu_pkt_buf_free_skb(pfirst);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001348 continue;
1349 }
1350
Joe Perches1e023822012-01-15 00:38:40 -08001351 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1352 pfirst->data,
1353 min_t(int, pfirst->len, 32),
1354 "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1355 bus->glom.qlen, pfirst, pfirst->data,
1356 pfirst->len, pfirst->next,
1357 pfirst->prev);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001358 }
Arend van Spriel0b45bf72011-11-22 17:21:36 -08001359 /* sent any remaining packets up */
1360 if (bus->glom.qlen) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001361 up(&bus->sdsem);
Franky Lin228bb432011-12-16 18:37:00 -08001362 brcmf_rx_frame(bus->sdiodev->dev, ifidx, &bus->glom);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001363 down(&bus->sdsem);
1364 }
1365
Arend van Spriel80969832012-06-09 22:51:44 +02001366 bus->sdcnt.rxglomframes++;
1367 bus->sdcnt.rxglompkts += bus->glom.qlen;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001368 }
1369 return num;
1370}
1371
Franky Line92eedf2011-11-22 17:21:50 -08001372static int brcmf_sdbrcm_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
Arend van Spriel5b435de2011-10-05 13:19:03 +02001373 bool *pending)
1374{
1375 DECLARE_WAITQUEUE(wait, current);
1376 int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT);
1377
1378 /* Wait until control frame is available */
1379 add_wait_queue(&bus->dcmd_resp_wait, &wait);
1380 set_current_state(TASK_INTERRUPTIBLE);
1381
1382 while (!(*condition) && (!signal_pending(current) && timeout))
1383 timeout = schedule_timeout(timeout);
1384
1385 if (signal_pending(current))
1386 *pending = true;
1387
1388 set_current_state(TASK_RUNNING);
1389 remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1390
1391 return timeout;
1392}
1393
Franky Line92eedf2011-11-22 17:21:50 -08001394static int brcmf_sdbrcm_dcmd_resp_wake(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02001395{
1396 if (waitqueue_active(&bus->dcmd_resp_wait))
1397 wake_up_interruptible(&bus->dcmd_resp_wait);
1398
1399 return 0;
1400}
1401static void
Franky Line92eedf2011-11-22 17:21:50 -08001402brcmf_sdbrcm_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
Arend van Spriel5b435de2011-10-05 13:19:03 +02001403{
1404 uint rdlen, pad;
1405
1406 int sdret;
1407
1408 brcmf_dbg(TRACE, "Enter\n");
1409
1410 /* Set rxctl for frame (w/optional alignment) */
1411 bus->rxctl = bus->rxbuf;
1412 bus->rxctl += BRCMF_FIRSTREAD;
1413 pad = ((unsigned long)bus->rxctl % BRCMF_SDALIGN);
1414 if (pad)
1415 bus->rxctl += (BRCMF_SDALIGN - pad);
1416 bus->rxctl -= BRCMF_FIRSTREAD;
1417
1418 /* Copy the already-read portion over */
1419 memcpy(bus->rxctl, hdr, BRCMF_FIRSTREAD);
1420 if (len <= BRCMF_FIRSTREAD)
1421 goto gotpkt;
1422
1423 /* Raise rdlen to next SDIO block to avoid tail command */
1424 rdlen = len - BRCMF_FIRSTREAD;
1425 if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1426 pad = bus->blocksize - (rdlen % bus->blocksize);
1427 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
Franky Linb01a6b32011-12-16 18:37:03 -08001428 ((len + pad) < bus->sdiodev->bus_if->maxctl))
Arend van Spriel5b435de2011-10-05 13:19:03 +02001429 rdlen += pad;
1430 } else if (rdlen % BRCMF_SDALIGN) {
1431 rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN);
1432 }
1433
1434 /* Satisfy length-alignment requirements */
1435 if (rdlen & (ALIGNMENT - 1))
1436 rdlen = roundup(rdlen, ALIGNMENT);
1437
1438 /* Drop if the read is too big or it exceeds our maximum */
Franky Linb01a6b32011-12-16 18:37:03 -08001439 if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001440 brcmf_dbg(ERROR, "%d-byte control read exceeds %d-byte buffer\n",
Franky Linb01a6b32011-12-16 18:37:03 -08001441 rdlen, bus->sdiodev->bus_if->maxctl);
Franky Lin719f2732011-12-16 18:37:06 -08001442 bus->sdiodev->bus_if->dstats.rx_errors++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001443 brcmf_sdbrcm_rxfail(bus, false, false);
1444 goto done;
1445 }
1446
Franky Linb01a6b32011-12-16 18:37:03 -08001447 if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001448 brcmf_dbg(ERROR, "%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
Franky Linb01a6b32011-12-16 18:37:03 -08001449 len, len - doff, bus->sdiodev->bus_if->maxctl);
Franky Lin719f2732011-12-16 18:37:06 -08001450 bus->sdiodev->bus_if->dstats.rx_errors++;
Arend van Spriel80969832012-06-09 22:51:44 +02001451 bus->sdcnt.rx_toolong++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001452 brcmf_sdbrcm_rxfail(bus, false, false);
1453 goto done;
1454 }
1455
1456 /* Read remainder of frame body into the rxctl buffer */
1457 sdret = brcmf_sdcard_recv_buf(bus->sdiodev,
1458 bus->sdiodev->sbwad,
1459 SDIO_FUNC_2,
Arend van Spriel5adfeb62011-11-22 17:21:38 -08001460 F2SYNC, (bus->rxctl + BRCMF_FIRSTREAD), rdlen);
Arend van Spriel80969832012-06-09 22:51:44 +02001461 bus->sdcnt.f2rxdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001462
1463 /* Control frame failures need retransmission */
1464 if (sdret < 0) {
1465 brcmf_dbg(ERROR, "read %d control bytes failed: %d\n",
1466 rdlen, sdret);
Arend van Spriel80969832012-06-09 22:51:44 +02001467 bus->sdcnt.rxc_errors++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001468 brcmf_sdbrcm_rxfail(bus, true, true);
1469 goto done;
1470 }
1471
1472gotpkt:
1473
Joe Perches1e023822012-01-15 00:38:40 -08001474 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
1475 bus->rxctl, len, "RxCtrl:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02001476
1477 /* Point to valid data and indicate its length */
1478 bus->rxctl += doff;
1479 bus->rxlen = len - doff;
1480
1481done:
1482 /* Awake any waiters */
1483 brcmf_sdbrcm_dcmd_resp_wake(bus);
1484}
1485
1486/* Pad read to blocksize for efficiency */
Franky Line92eedf2011-11-22 17:21:50 -08001487static void brcmf_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
Arend van Spriel5b435de2011-10-05 13:19:03 +02001488{
1489 if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1490 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1491 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1492 *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1493 *rdlen += *pad;
1494 } else if (*rdlen % BRCMF_SDALIGN) {
1495 *rdlen += BRCMF_SDALIGN - (*rdlen % BRCMF_SDALIGN);
1496 }
1497}
1498
1499static void
Franky Line92eedf2011-11-22 17:21:50 -08001500brcmf_alloc_pkt_and_read(struct brcmf_sdio *bus, u16 rdlen,
Arend van Spriel5b435de2011-10-05 13:19:03 +02001501 struct sk_buff **pkt, u8 **rxbuf)
1502{
1503 int sdret; /* Return code from calls */
1504
1505 *pkt = brcmu_pkt_buf_get_skb(rdlen + BRCMF_SDALIGN);
1506 if (*pkt == NULL)
1507 return;
1508
1509 pkt_align(*pkt, rdlen, BRCMF_SDALIGN);
1510 *rxbuf = (u8 *) ((*pkt)->data);
1511 /* Read the entire frame */
Arend van Spriel5adfeb62011-11-22 17:21:38 -08001512 sdret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1513 SDIO_FUNC_2, F2SYNC, *pkt);
Arend van Spriel80969832012-06-09 22:51:44 +02001514 bus->sdcnt.f2rxdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001515
1516 if (sdret < 0) {
1517 brcmf_dbg(ERROR, "(nextlen): read %d bytes failed: %d\n",
1518 rdlen, sdret);
1519 brcmu_pkt_buf_free_skb(*pkt);
Franky Lin719f2732011-12-16 18:37:06 -08001520 bus->sdiodev->bus_if->dstats.rx_errors++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001521 /* Force retry w/normal header read.
1522 * Don't attempt NAK for
1523 * gSPI
1524 */
1525 brcmf_sdbrcm_rxfail(bus, true, true);
1526 *pkt = NULL;
1527 }
1528}
1529
1530/* Checks the header */
1531static int
Franky Line92eedf2011-11-22 17:21:50 -08001532brcmf_check_rxbuf(struct brcmf_sdio *bus, struct sk_buff *pkt, u8 *rxbuf,
Arend van Spriel5b435de2011-10-05 13:19:03 +02001533 u8 rxseq, u16 nextlen, u16 *len)
1534{
1535 u16 check;
1536 bool len_consistent; /* Result of comparing readahead len and
1537 len from hw-hdr */
1538
1539 memcpy(bus->rxhdr, rxbuf, SDPCM_HDRLEN);
1540
1541 /* Extract hardware header fields */
1542 *len = get_unaligned_le16(bus->rxhdr);
1543 check = get_unaligned_le16(bus->rxhdr + sizeof(u16));
1544
1545 /* All zeros means readahead info was bad */
1546 if (!(*len | check)) {
1547 brcmf_dbg(INFO, "(nextlen): read zeros in HW header???\n");
1548 goto fail;
1549 }
1550
1551 /* Validate check bytes */
1552 if ((u16)~(*len ^ check)) {
1553 brcmf_dbg(ERROR, "(nextlen): HW hdr error: nextlen/len/check 0x%04x/0x%04x/0x%04x\n",
1554 nextlen, *len, check);
Arend van Spriel80969832012-06-09 22:51:44 +02001555 bus->sdcnt.rx_badhdr++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001556 brcmf_sdbrcm_rxfail(bus, false, false);
1557 goto fail;
1558 }
1559
1560 /* Validate frame length */
1561 if (*len < SDPCM_HDRLEN) {
1562 brcmf_dbg(ERROR, "(nextlen): HW hdr length invalid: %d\n",
1563 *len);
1564 goto fail;
1565 }
1566
1567 /* Check for consistency with readahead info */
1568 len_consistent = (nextlen != (roundup(*len, 16) >> 4));
1569 if (len_consistent) {
1570 /* Mismatch, force retry w/normal
1571 header (may be >4K) */
1572 brcmf_dbg(ERROR, "(nextlen): mismatch, nextlen %d len %d rnd %d; expected rxseq %d\n",
1573 nextlen, *len, roundup(*len, 16),
1574 rxseq);
1575 brcmf_sdbrcm_rxfail(bus, true, true);
1576 goto fail;
1577 }
1578
1579 return 0;
1580
1581fail:
1582 brcmf_sdbrcm_pktfree2(bus, pkt);
1583 return -EINVAL;
1584}
1585
1586/* Return true if there may be more frames to read */
1587static uint
Franky Line92eedf2011-11-22 17:21:50 -08001588brcmf_sdbrcm_readframes(struct brcmf_sdio *bus, uint maxframes, bool *finished)
Arend van Spriel5b435de2011-10-05 13:19:03 +02001589{
1590 u16 len, check; /* Extracted hardware header fields */
1591 u8 chan, seq, doff; /* Extracted software header fields */
1592 u8 fcbits; /* Extracted fcbits from software header */
1593
1594 struct sk_buff *pkt; /* Packet for event or data frames */
1595 u16 pad; /* Number of pad bytes to read */
1596 u16 rdlen; /* Total number of bytes to read */
1597 u8 rxseq; /* Next sequence number to expect */
1598 uint rxleft = 0; /* Remaining number of frames allowed */
1599 int sdret; /* Return code from calls */
1600 u8 txmax; /* Maximum tx sequence offered */
1601 u8 *rxbuf;
1602 int ifidx = 0;
1603 uint rxcount = 0; /* Total frames read */
1604
1605 brcmf_dbg(TRACE, "Enter\n");
1606
1607 /* Not finished unless we encounter no more frames indication */
1608 *finished = false;
1609
1610 for (rxseq = bus->rx_seq, rxleft = maxframes;
Franky Lin8d169aa2011-11-22 17:21:52 -08001611 !bus->rxskip && rxleft &&
Franky Lin712ac5b2011-12-16 18:37:09 -08001612 bus->sdiodev->bus_if->state != BRCMF_BUS_DOWN;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001613 rxseq++, rxleft--) {
1614
1615 /* Handle glomming separately */
Arend van Sprielb83db862011-10-19 12:51:09 +02001616 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001617 u8 cnt;
1618 brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
Arend van Sprielb83db862011-10-19 12:51:09 +02001619 bus->glomd, skb_peek(&bus->glom));
Arend van Spriel5b435de2011-10-05 13:19:03 +02001620 cnt = brcmf_sdbrcm_rxglom(bus, rxseq);
1621 brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1622 rxseq += cnt - 1;
1623 rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1624 continue;
1625 }
1626
1627 /* Try doing single read if we can */
1628 if (bus->nextlen) {
1629 u16 nextlen = bus->nextlen;
1630 bus->nextlen = 0;
1631
1632 rdlen = len = nextlen << 4;
1633 brcmf_pad(bus, &pad, &rdlen);
1634
1635 /*
1636 * After the frame is received we have to
1637 * distinguish whether it is data
1638 * or non-data frame.
1639 */
1640 brcmf_alloc_pkt_and_read(bus, rdlen, &pkt, &rxbuf);
1641 if (pkt == NULL) {
1642 /* Give up on data, request rtx of events */
1643 brcmf_dbg(ERROR, "(nextlen): brcmf_alloc_pkt_and_read failed: len %d rdlen %d expected rxseq %d\n",
1644 len, rdlen, rxseq);
1645 continue;
1646 }
1647
1648 if (brcmf_check_rxbuf(bus, pkt, rxbuf, rxseq, nextlen,
1649 &len) < 0)
1650 continue;
1651
1652 /* Extract software header fields */
1653 chan = SDPCM_PACKET_CHANNEL(
1654 &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1655 seq = SDPCM_PACKET_SEQUENCE(
1656 &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1657 doff = SDPCM_DOFFSET_VALUE(
1658 &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1659 txmax = SDPCM_WINDOW_VALUE(
1660 &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1661
1662 bus->nextlen =
1663 bus->rxhdr[SDPCM_FRAMETAG_LEN +
1664 SDPCM_NEXTLEN_OFFSET];
1665 if ((bus->nextlen << 4) > MAX_RX_DATASZ) {
1666 brcmf_dbg(INFO, "(nextlen): got frame w/nextlen too large (%d), seq %d\n",
1667 bus->nextlen, seq);
1668 bus->nextlen = 0;
1669 }
1670
Arend van Spriel80969832012-06-09 22:51:44 +02001671 bus->sdcnt.rx_readahead_cnt++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001672
1673 /* Handle Flow Control */
1674 fcbits = SDPCM_FCMASK_VALUE(
1675 &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1676
1677 if (bus->flowcontrol != fcbits) {
1678 if (~bus->flowcontrol & fcbits)
Arend van Spriel80969832012-06-09 22:51:44 +02001679 bus->sdcnt.fc_xoff++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001680
1681 if (bus->flowcontrol & ~fcbits)
Arend van Spriel80969832012-06-09 22:51:44 +02001682 bus->sdcnt.fc_xon++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001683
Arend van Spriel80969832012-06-09 22:51:44 +02001684 bus->sdcnt.fc_rcvd++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001685 bus->flowcontrol = fcbits;
1686 }
1687
1688 /* Check and update sequence number */
1689 if (rxseq != seq) {
1690 brcmf_dbg(INFO, "(nextlen): rx_seq %d, expected %d\n",
1691 seq, rxseq);
Arend van Spriel80969832012-06-09 22:51:44 +02001692 bus->sdcnt.rx_badseq++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001693 rxseq = seq;
1694 }
1695
1696 /* Check window for sanity */
1697 if ((u8) (txmax - bus->tx_seq) > 0x40) {
1698 brcmf_dbg(ERROR, "got unlikely tx max %d with tx_seq %d\n",
1699 txmax, bus->tx_seq);
1700 txmax = bus->tx_seq + 2;
1701 }
1702 bus->tx_max = txmax;
1703
Joe Perches1e023822012-01-15 00:38:40 -08001704 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1705 rxbuf, len, "Rx Data:\n");
1706 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1707 BRCMF_DATA_ON()) &&
1708 BRCMF_HDRS_ON(),
1709 bus->rxhdr, SDPCM_HDRLEN,
1710 "RxHdr:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02001711
1712 if (chan == SDPCM_CONTROL_CHANNEL) {
1713 brcmf_dbg(ERROR, "(nextlen): readahead on control packet %d?\n",
1714 seq);
1715 /* Force retry w/normal header read */
1716 bus->nextlen = 0;
1717 brcmf_sdbrcm_rxfail(bus, false, true);
1718 brcmf_sdbrcm_pktfree2(bus, pkt);
1719 continue;
1720 }
1721
1722 /* Validate data offset */
1723 if ((doff < SDPCM_HDRLEN) || (doff > len)) {
1724 brcmf_dbg(ERROR, "(nextlen): bad data offset %d: HW len %d min %d\n",
1725 doff, len, SDPCM_HDRLEN);
1726 brcmf_sdbrcm_rxfail(bus, false, false);
1727 brcmf_sdbrcm_pktfree2(bus, pkt);
1728 continue;
1729 }
1730
1731 /* All done with this one -- now deliver the packet */
1732 goto deliver;
1733 }
1734
1735 /* Read frame header (hardware and software) */
1736 sdret = brcmf_sdcard_recv_buf(bus->sdiodev, bus->sdiodev->sbwad,
1737 SDIO_FUNC_2, F2SYNC, bus->rxhdr,
Arend van Spriel5adfeb62011-11-22 17:21:38 -08001738 BRCMF_FIRSTREAD);
Arend van Spriel80969832012-06-09 22:51:44 +02001739 bus->sdcnt.f2rxhdrs++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001740
1741 if (sdret < 0) {
1742 brcmf_dbg(ERROR, "RXHEADER FAILED: %d\n", sdret);
Arend van Spriel80969832012-06-09 22:51:44 +02001743 bus->sdcnt.rx_hdrfail++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001744 brcmf_sdbrcm_rxfail(bus, true, true);
1745 continue;
1746 }
Joe Perches1e023822012-01-15 00:38:40 -08001747 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
1748 bus->rxhdr, SDPCM_HDRLEN, "RxHdr:\n");
1749
Arend van Spriel5b435de2011-10-05 13:19:03 +02001750
1751 /* Extract hardware header fields */
1752 len = get_unaligned_le16(bus->rxhdr);
1753 check = get_unaligned_le16(bus->rxhdr + sizeof(u16));
1754
1755 /* All zeros means no more frames */
1756 if (!(len | check)) {
1757 *finished = true;
1758 break;
1759 }
1760
1761 /* Validate check bytes */
1762 if ((u16) ~(len ^ check)) {
1763 brcmf_dbg(ERROR, "HW hdr err: len/check 0x%04x/0x%04x\n",
1764 len, check);
Arend van Spriel80969832012-06-09 22:51:44 +02001765 bus->sdcnt.rx_badhdr++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001766 brcmf_sdbrcm_rxfail(bus, false, false);
1767 continue;
1768 }
1769
1770 /* Validate frame length */
1771 if (len < SDPCM_HDRLEN) {
1772 brcmf_dbg(ERROR, "HW hdr length invalid: %d\n", len);
1773 continue;
1774 }
1775
1776 /* Extract software header fields */
1777 chan = SDPCM_PACKET_CHANNEL(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1778 seq = SDPCM_PACKET_SEQUENCE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1779 doff = SDPCM_DOFFSET_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1780 txmax = SDPCM_WINDOW_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1781
1782 /* Validate data offset */
1783 if ((doff < SDPCM_HDRLEN) || (doff > len)) {
1784 brcmf_dbg(ERROR, "Bad data offset %d: HW len %d, min %d seq %d\n",
1785 doff, len, SDPCM_HDRLEN, seq);
Arend van Spriel80969832012-06-09 22:51:44 +02001786 bus->sdcnt.rx_badhdr++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001787 brcmf_sdbrcm_rxfail(bus, false, false);
1788 continue;
1789 }
1790
1791 /* Save the readahead length if there is one */
1792 bus->nextlen =
1793 bus->rxhdr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
1794 if ((bus->nextlen << 4) > MAX_RX_DATASZ) {
1795 brcmf_dbg(INFO, "(nextlen): got frame w/nextlen too large (%d), seq %d\n",
1796 bus->nextlen, seq);
1797 bus->nextlen = 0;
1798 }
1799
1800 /* Handle Flow Control */
1801 fcbits = SDPCM_FCMASK_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1802
1803 if (bus->flowcontrol != fcbits) {
1804 if (~bus->flowcontrol & fcbits)
Arend van Spriel80969832012-06-09 22:51:44 +02001805 bus->sdcnt.fc_xoff++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001806
1807 if (bus->flowcontrol & ~fcbits)
Arend van Spriel80969832012-06-09 22:51:44 +02001808 bus->sdcnt.fc_xon++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001809
Arend van Spriel80969832012-06-09 22:51:44 +02001810 bus->sdcnt.fc_rcvd++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001811 bus->flowcontrol = fcbits;
1812 }
1813
1814 /* Check and update sequence number */
1815 if (rxseq != seq) {
1816 brcmf_dbg(INFO, "rx_seq %d, expected %d\n", seq, rxseq);
Arend van Spriel80969832012-06-09 22:51:44 +02001817 bus->sdcnt.rx_badseq++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001818 rxseq = seq;
1819 }
1820
1821 /* Check window for sanity */
1822 if ((u8) (txmax - bus->tx_seq) > 0x40) {
1823 brcmf_dbg(ERROR, "unlikely tx max %d with tx_seq %d\n",
1824 txmax, bus->tx_seq);
1825 txmax = bus->tx_seq + 2;
1826 }
1827 bus->tx_max = txmax;
1828
1829 /* Call a separate function for control frames */
1830 if (chan == SDPCM_CONTROL_CHANNEL) {
1831 brcmf_sdbrcm_read_control(bus, bus->rxhdr, len, doff);
1832 continue;
1833 }
1834
1835 /* precondition: chan is either SDPCM_DATA_CHANNEL,
1836 SDPCM_EVENT_CHANNEL, SDPCM_TEST_CHANNEL or
1837 SDPCM_GLOM_CHANNEL */
1838
1839 /* Length to read */
1840 rdlen = (len > BRCMF_FIRSTREAD) ? (len - BRCMF_FIRSTREAD) : 0;
1841
1842 /* May pad read to blocksize for efficiency */
1843 if (bus->roundup && bus->blocksize &&
1844 (rdlen > bus->blocksize)) {
1845 pad = bus->blocksize - (rdlen % bus->blocksize);
1846 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1847 ((rdlen + pad + BRCMF_FIRSTREAD) < MAX_RX_DATASZ))
1848 rdlen += pad;
1849 } else if (rdlen % BRCMF_SDALIGN) {
1850 rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN);
1851 }
1852
1853 /* Satisfy length-alignment requirements */
1854 if (rdlen & (ALIGNMENT - 1))
1855 rdlen = roundup(rdlen, ALIGNMENT);
1856
1857 if ((rdlen + BRCMF_FIRSTREAD) > MAX_RX_DATASZ) {
1858 /* Too long -- skip this frame */
1859 brcmf_dbg(ERROR, "too long: len %d rdlen %d\n",
1860 len, rdlen);
Franky Lin719f2732011-12-16 18:37:06 -08001861 bus->sdiodev->bus_if->dstats.rx_errors++;
Arend van Spriel80969832012-06-09 22:51:44 +02001862 bus->sdcnt.rx_toolong++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001863 brcmf_sdbrcm_rxfail(bus, false, false);
1864 continue;
1865 }
1866
1867 pkt = brcmu_pkt_buf_get_skb(rdlen +
1868 BRCMF_FIRSTREAD + BRCMF_SDALIGN);
1869 if (!pkt) {
1870 /* Give up on data, request rtx of events */
1871 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: rdlen %d chan %d\n",
1872 rdlen, chan);
Franky Lin719f2732011-12-16 18:37:06 -08001873 bus->sdiodev->bus_if->dstats.rx_dropped++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001874 brcmf_sdbrcm_rxfail(bus, false, RETRYCHAN(chan));
1875 continue;
1876 }
1877
1878 /* Leave room for what we already read, and align remainder */
1879 skb_pull(pkt, BRCMF_FIRSTREAD);
1880 pkt_align(pkt, rdlen, BRCMF_SDALIGN);
1881
1882 /* Read the remaining frame data */
Arend van Spriel5adfeb62011-11-22 17:21:38 -08001883 sdret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1884 SDIO_FUNC_2, F2SYNC, pkt);
Arend van Spriel80969832012-06-09 22:51:44 +02001885 bus->sdcnt.f2rxdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001886
1887 if (sdret < 0) {
1888 brcmf_dbg(ERROR, "read %d %s bytes failed: %d\n", rdlen,
1889 ((chan == SDPCM_EVENT_CHANNEL) ? "event"
1890 : ((chan == SDPCM_DATA_CHANNEL) ? "data"
1891 : "test")), sdret);
1892 brcmu_pkt_buf_free_skb(pkt);
Franky Lin719f2732011-12-16 18:37:06 -08001893 bus->sdiodev->bus_if->dstats.rx_errors++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001894 brcmf_sdbrcm_rxfail(bus, true, RETRYCHAN(chan));
1895 continue;
1896 }
1897
1898 /* Copy the already-read portion */
1899 skb_push(pkt, BRCMF_FIRSTREAD);
1900 memcpy(pkt->data, bus->rxhdr, BRCMF_FIRSTREAD);
1901
Joe Perches1e023822012-01-15 00:38:40 -08001902 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1903 pkt->data, len, "Rx Data:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02001904
1905deliver:
1906 /* Save superframe descriptor and allocate packet frame */
1907 if (chan == SDPCM_GLOM_CHANNEL) {
1908 if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_FRAMETAG_LEN])) {
1909 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
1910 len);
Joe Perches1e023822012-01-15 00:38:40 -08001911 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1912 pkt->data, len,
1913 "Glom Data:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02001914 __skb_trim(pkt, len);
1915 skb_pull(pkt, SDPCM_HDRLEN);
1916 bus->glomd = pkt;
1917 } else {
1918 brcmf_dbg(ERROR, "%s: glom superframe w/o "
1919 "descriptor!\n", __func__);
1920 brcmf_sdbrcm_rxfail(bus, false, false);
1921 }
1922 continue;
1923 }
1924
1925 /* Fill in packet len and prio, deliver upward */
1926 __skb_trim(pkt, len);
1927 skb_pull(pkt, doff);
1928
1929 if (pkt->len == 0) {
1930 brcmu_pkt_buf_free_skb(pkt);
1931 continue;
Franky Lind5625ee2011-12-16 18:37:01 -08001932 } else if (brcmf_proto_hdrpull(bus->sdiodev->dev, &ifidx,
1933 pkt) != 0) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02001934 brcmf_dbg(ERROR, "rx protocol error\n");
1935 brcmu_pkt_buf_free_skb(pkt);
Franky Lin719f2732011-12-16 18:37:06 -08001936 bus->sdiodev->bus_if->dstats.rx_errors++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001937 continue;
1938 }
1939
1940 /* Unlock during rx call */
1941 up(&bus->sdsem);
Franky Lin228bb432011-12-16 18:37:00 -08001942 brcmf_rx_packet(bus->sdiodev->dev, ifidx, pkt);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001943 down(&bus->sdsem);
1944 }
1945 rxcount = maxframes - rxleft;
Arend van Spriel5b435de2011-10-05 13:19:03 +02001946 /* Message if we hit the limit */
1947 if (!rxleft)
1948 brcmf_dbg(DATA, "hit rx limit of %d frames\n",
1949 maxframes);
1950 else
Arend van Spriel5b435de2011-10-05 13:19:03 +02001951 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
1952 /* Back off rxseq if awaiting rtx, update rx_seq */
1953 if (bus->rxskip)
1954 rxseq--;
1955 bus->rx_seq = rxseq;
1956
1957 return rxcount;
1958}
1959
Arend van Spriel5b435de2011-10-05 13:19:03 +02001960static void
Franky Line92eedf2011-11-22 17:21:50 -08001961brcmf_sdbrcm_wait_for_event(struct brcmf_sdio *bus, bool *lockvar)
Arend van Spriel5b435de2011-10-05 13:19:03 +02001962{
1963 up(&bus->sdsem);
Joe Perches23677ce2012-02-09 11:17:23 +00001964 wait_event_interruptible_timeout(bus->ctrl_wait, !*lockvar, HZ * 2);
Arend van Spriel5b435de2011-10-05 13:19:03 +02001965 down(&bus->sdsem);
1966 return;
1967}
1968
1969static void
Franky Line92eedf2011-11-22 17:21:50 -08001970brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02001971{
1972 if (waitqueue_active(&bus->ctrl_wait))
1973 wake_up_interruptible(&bus->ctrl_wait);
1974 return;
1975}
1976
1977/* Writes a HW/SW header into the packet and sends it. */
1978/* Assumes: (a) header space already there, (b) caller holds lock */
Franky Line92eedf2011-11-22 17:21:50 -08001979static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
Arend van Spriel5b435de2011-10-05 13:19:03 +02001980 uint chan, bool free_pkt)
1981{
1982 int ret;
1983 u8 *frame;
1984 u16 len, pad = 0;
1985 u32 swheader;
1986 struct sk_buff *new;
1987 int i;
1988
1989 brcmf_dbg(TRACE, "Enter\n");
1990
1991 frame = (u8 *) (pkt->data);
1992
1993 /* Add alignment padding, allocate new packet if needed */
1994 pad = ((unsigned long)frame % BRCMF_SDALIGN);
1995 if (pad) {
1996 if (skb_headroom(pkt) < pad) {
1997 brcmf_dbg(INFO, "insufficient headroom %d for %d pad\n",
1998 skb_headroom(pkt), pad);
Franky Lin9c1a0432011-12-16 18:37:07 -08001999 bus->sdiodev->bus_if->tx_realloc++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002000 new = brcmu_pkt_buf_get_skb(pkt->len + BRCMF_SDALIGN);
2001 if (!new) {
2002 brcmf_dbg(ERROR, "couldn't allocate new %d-byte packet\n",
2003 pkt->len + BRCMF_SDALIGN);
2004 ret = -ENOMEM;
2005 goto done;
2006 }
2007
2008 pkt_align(new, pkt->len, BRCMF_SDALIGN);
2009 memcpy(new->data, pkt->data, pkt->len);
2010 if (free_pkt)
2011 brcmu_pkt_buf_free_skb(pkt);
2012 /* free the pkt if canned one is not used */
2013 free_pkt = true;
2014 pkt = new;
2015 frame = (u8 *) (pkt->data);
2016 /* precondition: (frame % BRCMF_SDALIGN) == 0) */
2017 pad = 0;
2018 } else {
2019 skb_push(pkt, pad);
2020 frame = (u8 *) (pkt->data);
2021 /* precondition: pad + SDPCM_HDRLEN <= pkt->len */
2022 memset(frame, 0, pad + SDPCM_HDRLEN);
2023 }
2024 }
2025 /* precondition: pad < BRCMF_SDALIGN */
2026
2027 /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
2028 len = (u16) (pkt->len);
2029 *(__le16 *) frame = cpu_to_le16(len);
2030 *(((__le16 *) frame) + 1) = cpu_to_le16(~len);
2031
2032 /* Software tag: channel, sequence number, data offset */
2033 swheader =
2034 ((chan << SDPCM_CHANNEL_SHIFT) & SDPCM_CHANNEL_MASK) | bus->tx_seq |
2035 (((pad +
2036 SDPCM_HDRLEN) << SDPCM_DOFFSET_SHIFT) & SDPCM_DOFFSET_MASK);
2037
2038 put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
2039 put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
2040
Joe Perches8ae74652012-01-15 00:38:38 -08002041#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +02002042 tx_packets[pkt->priority]++;
Joe Perches18aad4f2012-01-15 00:38:42 -08002043#endif
Joe Perches1e023822012-01-15 00:38:40 -08002044
2045 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() &&
2046 ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
2047 (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)),
2048 frame, len, "Tx Frame:\n");
2049 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
2050 ((BRCMF_CTL_ON() &&
2051 chan == SDPCM_CONTROL_CHANNEL) ||
2052 (BRCMF_DATA_ON() &&
2053 chan != SDPCM_CONTROL_CHANNEL))) &&
2054 BRCMF_HDRS_ON(),
2055 frame, min_t(u16, len, 16), "TxHdr:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02002056
2057 /* Raise len to next SDIO block to eliminate tail command */
2058 if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2059 u16 pad = bus->blocksize - (len % bus->blocksize);
2060 if ((pad <= bus->roundup) && (pad < bus->blocksize))
2061 len += pad;
2062 } else if (len % BRCMF_SDALIGN) {
2063 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
2064 }
2065
2066 /* Some controllers have trouble with odd bytes -- round to even */
2067 if (len & (ALIGNMENT - 1))
2068 len = roundup(len, ALIGNMENT);
2069
Arend van Spriel5adfeb62011-11-22 17:21:38 -08002070 ret = brcmf_sdcard_send_pkt(bus->sdiodev, bus->sdiodev->sbwad,
2071 SDIO_FUNC_2, F2SYNC, pkt);
Arend van Spriel80969832012-06-09 22:51:44 +02002072 bus->sdcnt.f2txdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002073
2074 if (ret < 0) {
2075 /* On failure, abort the command and terminate the frame */
2076 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2077 ret);
Arend van Spriel80969832012-06-09 22:51:44 +02002078 bus->sdcnt.tx_sderrs++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002079
2080 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
Franky Lin3bba8292012-05-04 18:27:33 -07002081 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2082 SFC_WF_TERM, NULL);
Arend van Spriel80969832012-06-09 22:51:44 +02002083 bus->sdcnt.f1regdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002084
2085 for (i = 0; i < 3; i++) {
2086 u8 hi, lo;
Franky Lin45db3392012-05-04 18:27:32 -07002087 hi = brcmf_sdio_regrb(bus->sdiodev,
2088 SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2089 lo = brcmf_sdio_regrb(bus->sdiodev,
2090 SBSDIO_FUNC1_WFRAMEBCLO, NULL);
Arend van Spriel80969832012-06-09 22:51:44 +02002091 bus->sdcnt.f1regdata += 2;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002092 if ((hi == 0) && (lo == 0))
2093 break;
2094 }
2095
2096 }
2097 if (ret == 0)
2098 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2099
2100done:
2101 /* restore pkt buffer pointer before calling tx complete routine */
2102 skb_pull(pkt, SDPCM_HDRLEN + pad);
2103 up(&bus->sdsem);
Franky Linc9957882011-12-16 18:36:58 -08002104 brcmf_txcomplete(bus->sdiodev->dev, pkt, ret != 0);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002105 down(&bus->sdsem);
2106
2107 if (free_pkt)
2108 brcmu_pkt_buf_free_skb(pkt);
2109
2110 return ret;
2111}
2112
Franky Line92eedf2011-11-22 17:21:50 -08002113static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes)
Arend van Spriel5b435de2011-10-05 13:19:03 +02002114{
2115 struct sk_buff *pkt;
2116 u32 intstatus = 0;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002117 int ret = 0, prec_out;
2118 uint cnt = 0;
2119 uint datalen;
2120 u8 tx_prec_map;
2121
Arend van Spriel5b435de2011-10-05 13:19:03 +02002122 brcmf_dbg(TRACE, "Enter\n");
2123
2124 tx_prec_map = ~bus->flowcontrol;
2125
2126 /* Send frames until the limit or some other event */
2127 for (cnt = 0; (cnt < maxframes) && data_ok(bus); cnt++) {
2128 spin_lock_bh(&bus->txqlock);
2129 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map, &prec_out);
2130 if (pkt == NULL) {
2131 spin_unlock_bh(&bus->txqlock);
2132 break;
2133 }
2134 spin_unlock_bh(&bus->txqlock);
2135 datalen = pkt->len - SDPCM_HDRLEN;
2136
2137 ret = brcmf_sdbrcm_txpkt(bus, pkt, SDPCM_DATA_CHANNEL, true);
2138 if (ret)
Franky Lin719f2732011-12-16 18:37:06 -08002139 bus->sdiodev->bus_if->dstats.tx_errors++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002140 else
Franky Lin719f2732011-12-16 18:37:06 -08002141 bus->sdiodev->bus_if->dstats.tx_bytes += datalen;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002142
2143 /* In poll mode, need to check for other events */
2144 if (!bus->intr && cnt) {
2145 /* Check device status, signal pending interrupt */
Franky Lin5c15c232012-05-04 18:27:37 -07002146 ret = r_sdreg32(bus, &intstatus,
2147 offsetof(struct sdpcmd_regs,
2148 intstatus));
Arend van Spriel80969832012-06-09 22:51:44 +02002149 bus->sdcnt.f2txdata++;
Franky Lin5c15c232012-05-04 18:27:37 -07002150 if (ret != 0)
Arend van Spriel5b435de2011-10-05 13:19:03 +02002151 break;
2152 if (intstatus & bus->hostintmask)
Franky Lin1d382272012-09-13 21:11:59 +02002153 atomic_set(&bus->ipend, 1);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002154 }
2155 }
2156
2157 /* Deflow-control stack if needed */
Franky Lin712ac5b2011-12-16 18:37:09 -08002158 if (bus->sdiodev->bus_if->drvr_up &&
2159 (bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) &&
Franky Linc8bf3482011-12-16 18:37:08 -08002160 bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
Hante Meuleman90d03ff2012-09-11 21:18:46 +02002161 bus->txoff = false;
2162 brcmf_txflowblock(bus->sdiodev->dev, false);
Franky Linc8bf3482011-12-16 18:37:08 -08002163 }
Arend van Spriel5b435de2011-10-05 13:19:03 +02002164
2165 return cnt;
2166}
2167
Franky Lina9ffda82011-12-16 18:37:12 -08002168static void brcmf_sdbrcm_bus_stop(struct device *dev)
2169{
2170 u32 local_hostintmask;
2171 u8 saveclk;
Franky Lina9ffda82011-12-16 18:37:12 -08002172 int err;
2173 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
Arend van Spriel0a332e42012-02-09 21:09:02 +01002174 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
Franky Lina9ffda82011-12-16 18:37:12 -08002175 struct brcmf_sdio *bus = sdiodev->bus;
2176
2177 brcmf_dbg(TRACE, "Enter\n");
2178
2179 if (bus->watchdog_tsk) {
2180 send_sig(SIGTERM, bus->watchdog_tsk, 1);
2181 kthread_stop(bus->watchdog_tsk);
2182 bus->watchdog_tsk = NULL;
2183 }
2184
Franky Lina9ffda82011-12-16 18:37:12 -08002185 down(&bus->sdsem);
2186
Franky Lina9ffda82011-12-16 18:37:12 -08002187 /* Enable clock for device interrupts */
2188 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
2189
2190 /* Disable and clear interrupts at the chip level also */
Franky Lin58692752012-05-04 18:27:36 -07002191 w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask));
Franky Lina9ffda82011-12-16 18:37:12 -08002192 local_hostintmask = bus->hostintmask;
2193 bus->hostintmask = 0;
2194
2195 /* Change our idea of bus state */
2196 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2197
2198 /* Force clocks on backplane to be sure F2 interrupt propagates */
Franky Lin45db3392012-05-04 18:27:32 -07002199 saveclk = brcmf_sdio_regrb(bus->sdiodev,
2200 SBSDIO_FUNC1_CHIPCLKCSR, &err);
Franky Lina9ffda82011-12-16 18:37:12 -08002201 if (!err) {
Franky Lin3bba8292012-05-04 18:27:33 -07002202 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2203 (saveclk | SBSDIO_FORCE_HT), &err);
Franky Lina9ffda82011-12-16 18:37:12 -08002204 }
2205 if (err)
2206 brcmf_dbg(ERROR, "Failed to force clock for F2: err %d\n", err);
2207
2208 /* Turn off the bus (F2), free any pending packets */
2209 brcmf_dbg(INTR, "disable SDIO interrupts\n");
Franky Lin3bba8292012-05-04 18:27:33 -07002210 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, SDIO_FUNC_ENABLE_1,
2211 NULL);
Franky Lina9ffda82011-12-16 18:37:12 -08002212
2213 /* Clear any pending interrupts now that F2 is disabled */
2214 w_sdreg32(bus, local_hostintmask,
Franky Lin58692752012-05-04 18:27:36 -07002215 offsetof(struct sdpcmd_regs, intstatus));
Franky Lina9ffda82011-12-16 18:37:12 -08002216
2217 /* Turn off the backplane clock (only) */
2218 brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
2219
2220 /* Clear the data packet queues */
2221 brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
2222
2223 /* Clear any held glomming stuff */
2224 if (bus->glomd)
2225 brcmu_pkt_buf_free_skb(bus->glomd);
2226 brcmf_sdbrcm_free_glom(bus);
2227
2228 /* Clear rx control and wake any waiters */
2229 bus->rxlen = 0;
2230 brcmf_sdbrcm_dcmd_resp_wake(bus);
2231
2232 /* Reset some F2 state stuff */
2233 bus->rxskip = false;
2234 bus->tx_seq = bus->rx_seq = 0;
2235
2236 up(&bus->sdsem);
2237}
2238
Franky Linba89bf12012-04-27 18:56:59 -07002239#ifdef CONFIG_BRCMFMAC_SDIO_OOB
2240static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus)
2241{
2242 unsigned long flags;
2243
2244 spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags);
Franky Lin1d382272012-09-13 21:11:59 +02002245 if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) {
Franky Linba89bf12012-04-27 18:56:59 -07002246 enable_irq(bus->sdiodev->irq);
2247 bus->sdiodev->irq_en = true;
2248 }
2249 spin_unlock_irqrestore(&bus->sdiodev->irq_en_lock, flags);
2250}
2251#else
2252static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus)
2253{
2254}
2255#endif /* CONFIG_BRCMFMAC_SDIO_OOB */
2256
Franky Linf1e68c22012-09-13 21:12:00 +02002257static inline void brcmf_sdbrcm_adddpctsk(struct brcmf_sdio *bus)
2258{
2259 struct list_head *new_hd;
2260 unsigned long flags;
2261
2262 if (in_interrupt())
2263 new_hd = kzalloc(sizeof(struct list_head), GFP_ATOMIC);
2264 else
2265 new_hd = kzalloc(sizeof(struct list_head), GFP_KERNEL);
2266 if (new_hd == NULL)
2267 return;
2268
2269 spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2270 list_add_tail(new_hd, &bus->dpc_tsklst);
2271 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2272}
2273
2274static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02002275{
2276 u32 intstatus, newstatus = 0;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002277 uint rxlimit = bus->rxbound; /* Rx frames to read before resched */
2278 uint txlimit = bus->txbound; /* Tx frames to send before resched */
2279 uint framecnt = 0; /* Temporary counter of tx/rx frames */
2280 bool rxdone = true; /* Flag for no more read data */
Franky Linf1e68c22012-09-13 21:12:00 +02002281 int err = 0;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002282
2283 brcmf_dbg(TRACE, "Enter\n");
2284
2285 /* Start with leftover status bits */
2286 intstatus = bus->intstatus;
2287
2288 down(&bus->sdsem);
2289
2290 /* If waiting for HTAVAIL, check status */
2291 if (bus->clkstate == CLK_PENDING) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02002292 u8 clkctl, devctl = 0;
2293
Joe Perches8ae74652012-01-15 00:38:38 -08002294#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +02002295 /* Check for inconsistent device control */
Franky Lin45db3392012-05-04 18:27:32 -07002296 devctl = brcmf_sdio_regrb(bus->sdiodev,
2297 SBSDIO_DEVICE_CTL, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002298 if (err) {
2299 brcmf_dbg(ERROR, "error reading DEVCTL: %d\n", err);
Franky Lin712ac5b2011-12-16 18:37:09 -08002300 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002301 }
Joe Perches8ae74652012-01-15 00:38:38 -08002302#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +02002303
2304 /* Read CSR, if clock on switch to AVAIL, else ignore */
Franky Lin45db3392012-05-04 18:27:32 -07002305 clkctl = brcmf_sdio_regrb(bus->sdiodev,
2306 SBSDIO_FUNC1_CHIPCLKCSR, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002307 if (err) {
2308 brcmf_dbg(ERROR, "error reading CSR: %d\n",
2309 err);
Franky Lin712ac5b2011-12-16 18:37:09 -08002310 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002311 }
2312
2313 brcmf_dbg(INFO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2314 devctl, clkctl);
2315
2316 if (SBSDIO_HTAV(clkctl)) {
Franky Lin45db3392012-05-04 18:27:32 -07002317 devctl = brcmf_sdio_regrb(bus->sdiodev,
2318 SBSDIO_DEVICE_CTL, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002319 if (err) {
2320 brcmf_dbg(ERROR, "error reading DEVCTL: %d\n",
2321 err);
Franky Lin712ac5b2011-12-16 18:37:09 -08002322 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002323 }
2324 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
Franky Lin3bba8292012-05-04 18:27:33 -07002325 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
2326 devctl, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002327 if (err) {
2328 brcmf_dbg(ERROR, "error writing DEVCTL: %d\n",
2329 err);
Franky Lin712ac5b2011-12-16 18:37:09 -08002330 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002331 }
2332 bus->clkstate = CLK_AVAIL;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002333 }
2334 }
2335
Arend van Spriel5b435de2011-10-05 13:19:03 +02002336 /* Make sure backplane clock is on */
2337 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, true);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002338
2339 /* Pending interrupt indicates new device status */
Franky Lin1d382272012-09-13 21:11:59 +02002340 if (atomic_read(&bus->ipend) > 0) {
2341 atomic_set(&bus->ipend, 0);
Franky Lin5c15c232012-05-04 18:27:37 -07002342 err = r_sdreg32(bus, &newstatus,
2343 offsetof(struct sdpcmd_regs, intstatus));
Arend van Spriel80969832012-06-09 22:51:44 +02002344 bus->sdcnt.f1regdata++;
Franky Lin5c15c232012-05-04 18:27:37 -07002345 if (err != 0)
Arend van Spriel5b435de2011-10-05 13:19:03 +02002346 newstatus = 0;
2347 newstatus &= bus->hostintmask;
2348 bus->fcstate = !!(newstatus & I_HMB_FC_STATE);
2349 if (newstatus) {
Franky Lin5c15c232012-05-04 18:27:37 -07002350 err = w_sdreg32(bus, newstatus,
2351 offsetof(struct sdpcmd_regs,
2352 intstatus));
Arend van Spriel80969832012-06-09 22:51:44 +02002353 bus->sdcnt.f1regdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002354 }
2355 }
2356
2357 /* Merge new bits with previous */
2358 intstatus |= newstatus;
2359 bus->intstatus = 0;
2360
2361 /* Handle flow-control change: read new state in case our ack
2362 * crossed another change interrupt. If change still set, assume
2363 * FC ON for safety, let next loop through do the debounce.
2364 */
2365 if (intstatus & I_HMB_FC_CHANGE) {
2366 intstatus &= ~I_HMB_FC_CHANGE;
Franky Lin5c15c232012-05-04 18:27:37 -07002367 err = w_sdreg32(bus, I_HMB_FC_CHANGE,
2368 offsetof(struct sdpcmd_regs, intstatus));
Arend van Spriel5b435de2011-10-05 13:19:03 +02002369
Franky Lin5c15c232012-05-04 18:27:37 -07002370 err = r_sdreg32(bus, &newstatus,
2371 offsetof(struct sdpcmd_regs, intstatus));
Arend van Spriel80969832012-06-09 22:51:44 +02002372 bus->sdcnt.f1regdata += 2;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002373 bus->fcstate =
2374 !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE));
2375 intstatus |= (newstatus & bus->hostintmask);
2376 }
2377
2378 /* Handle host mailbox indication */
2379 if (intstatus & I_HMB_HOST_INT) {
2380 intstatus &= ~I_HMB_HOST_INT;
2381 intstatus |= brcmf_sdbrcm_hostmail(bus);
2382 }
2383
2384 /* Generally don't ask for these, can get CRC errors... */
2385 if (intstatus & I_WR_OOSYNC) {
2386 brcmf_dbg(ERROR, "Dongle reports WR_OOSYNC\n");
2387 intstatus &= ~I_WR_OOSYNC;
2388 }
2389
2390 if (intstatus & I_RD_OOSYNC) {
2391 brcmf_dbg(ERROR, "Dongle reports RD_OOSYNC\n");
2392 intstatus &= ~I_RD_OOSYNC;
2393 }
2394
2395 if (intstatus & I_SBINT) {
2396 brcmf_dbg(ERROR, "Dongle reports SBINT\n");
2397 intstatus &= ~I_SBINT;
2398 }
2399
2400 /* Would be active due to wake-wlan in gSPI */
2401 if (intstatus & I_CHIPACTIVE) {
2402 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2403 intstatus &= ~I_CHIPACTIVE;
2404 }
2405
2406 /* Ignore frame indications if rxskip is set */
2407 if (bus->rxskip)
2408 intstatus &= ~I_HMB_FRAME_IND;
2409
2410 /* On frame indication, read available frames */
Franky Lin03d5c362012-09-13 21:12:01 +02002411 if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02002412 framecnt = brcmf_sdbrcm_readframes(bus, rxlimit, &rxdone);
2413 if (rxdone || bus->rxskip)
2414 intstatus &= ~I_HMB_FRAME_IND;
2415 rxlimit -= min(framecnt, rxlimit);
2416 }
2417
2418 /* Keep still-pending events for next scheduling */
2419 bus->intstatus = intstatus;
2420
Franky Linba89bf12012-04-27 18:56:59 -07002421 brcmf_sdbrcm_clrintr(bus);
2422
Arend van Spriel5b435de2011-10-05 13:19:03 +02002423 if (data_ok(bus) && bus->ctrl_frame_stat &&
2424 (bus->clkstate == CLK_AVAIL)) {
Franky Lin03d5c362012-09-13 21:12:01 +02002425 int i;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002426
Franky Lin03d5c362012-09-13 21:12:01 +02002427 err = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
Joe Perches2c208892012-06-04 12:44:17 +00002428 SDIO_FUNC_2, F2SYNC, bus->ctrl_frame_buf,
Arend van Spriel5adfeb62011-11-22 17:21:38 -08002429 (u32) bus->ctrl_frame_len);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002430
Franky Lin03d5c362012-09-13 21:12:01 +02002431 if (err < 0) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02002432 /* On failure, abort the command and
2433 terminate the frame */
2434 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
Franky Lin03d5c362012-09-13 21:12:01 +02002435 err);
Arend van Spriel80969832012-06-09 22:51:44 +02002436 bus->sdcnt.tx_sderrs++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002437
2438 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2439
Franky Lin3bba8292012-05-04 18:27:33 -07002440 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
Franky Lin5c15c232012-05-04 18:27:37 -07002441 SFC_WF_TERM, &err);
Arend van Spriel80969832012-06-09 22:51:44 +02002442 bus->sdcnt.f1regdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002443
2444 for (i = 0; i < 3; i++) {
2445 u8 hi, lo;
Franky Lin45db3392012-05-04 18:27:32 -07002446 hi = brcmf_sdio_regrb(bus->sdiodev,
2447 SBSDIO_FUNC1_WFRAMEBCHI,
Franky Lin5c15c232012-05-04 18:27:37 -07002448 &err);
Franky Lin45db3392012-05-04 18:27:32 -07002449 lo = brcmf_sdio_regrb(bus->sdiodev,
2450 SBSDIO_FUNC1_WFRAMEBCLO,
Franky Lin5c15c232012-05-04 18:27:37 -07002451 &err);
Arend van Spriel80969832012-06-09 22:51:44 +02002452 bus->sdcnt.f1regdata += 2;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002453 if ((hi == 0) && (lo == 0))
2454 break;
2455 }
2456
Franky Lin03d5c362012-09-13 21:12:01 +02002457 } else {
Arend van Spriel5b435de2011-10-05 13:19:03 +02002458 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
Franky Lin03d5c362012-09-13 21:12:01 +02002459 }
Arend van Spriel5b435de2011-10-05 13:19:03 +02002460 bus->ctrl_frame_stat = false;
2461 brcmf_sdbrcm_wait_event_wakeup(bus);
2462 }
2463 /* Send queued frames (limit 1 if rx may still be pending) */
2464 else if ((bus->clkstate == CLK_AVAIL) && !bus->fcstate &&
2465 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit
2466 && data_ok(bus)) {
2467 framecnt = rxdone ? txlimit : min(txlimit, bus->txminmax);
2468 framecnt = brcmf_sdbrcm_sendfromq(bus, framecnt);
2469 txlimit -= framecnt;
2470 }
2471
Franky Lin5c15c232012-05-04 18:27:37 -07002472 if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) || (err != 0)) {
2473 brcmf_dbg(ERROR, "failed backplane access over SDIO, halting operation\n");
Franky Lin712ac5b2011-12-16 18:37:09 -08002474 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002475 bus->intstatus = 0;
Franky Lin1d382272012-09-13 21:11:59 +02002476 } else if (bus->intstatus || atomic_read(&bus->ipend) > 0 ||
Arend van Spriel5b435de2011-10-05 13:19:03 +02002477 (!bus->fcstate && brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol)
2478 && data_ok(bus)) || PKT_AVAILABLE()) {
Franky Linf1e68c22012-09-13 21:12:00 +02002479 brcmf_sdbrcm_adddpctsk(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002480 }
2481
Arend van Spriel5b435de2011-10-05 13:19:03 +02002482 /* If we're done for now, turn off clock request. */
2483 if ((bus->clkstate != CLK_PENDING)
2484 && bus->idletime == BRCMF_IDLE_IMMEDIATE) {
2485 bus->activity = false;
2486 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
2487 }
2488
2489 up(&bus->sdsem);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002490}
2491
Franky Linb9692d12011-12-16 18:37:15 -08002492static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt)
Arend van Spriel5b435de2011-10-05 13:19:03 +02002493{
2494 int ret = -EBADE;
2495 uint datalen, prec;
Franky Linbf347bb2011-11-22 17:21:56 -08002496 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
Arend van Spriel0a332e42012-02-09 21:09:02 +01002497 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
Franky Linbf347bb2011-11-22 17:21:56 -08002498 struct brcmf_sdio *bus = sdiodev->bus;
Franky Linf1e68c22012-09-13 21:12:00 +02002499 unsigned long flags;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002500
2501 brcmf_dbg(TRACE, "Enter\n");
2502
2503 datalen = pkt->len;
2504
2505 /* Add space for the header */
2506 skb_push(pkt, SDPCM_HDRLEN);
2507 /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2508
2509 prec = prio2prec((pkt->priority & PRIOMASK));
2510
2511 /* Check for existing queue, current flow-control,
2512 pending event, or pending clock */
2513 brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
Arend van Spriel80969832012-06-09 22:51:44 +02002514 bus->sdcnt.fcqueued++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002515
2516 /* Priority based enq */
2517 spin_lock_bh(&bus->txqlock);
Joe Perches23677ce2012-02-09 11:17:23 +00002518 if (!brcmf_c_prec_enq(bus->sdiodev->dev, &bus->txq, pkt, prec)) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02002519 skb_pull(pkt, SDPCM_HDRLEN);
Franky Linc9957882011-12-16 18:36:58 -08002520 brcmf_txcomplete(bus->sdiodev->dev, pkt, false);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002521 brcmu_pkt_buf_free_skb(pkt);
2522 brcmf_dbg(ERROR, "out of bus->txq !!!\n");
2523 ret = -ENOSR;
2524 } else {
2525 ret = 0;
2526 }
2527 spin_unlock_bh(&bus->txqlock);
2528
Franky Linc8bf3482011-12-16 18:37:08 -08002529 if (pktq_len(&bus->txq) >= TXHI) {
Hante Meuleman90d03ff2012-09-11 21:18:46 +02002530 bus->txoff = true;
2531 brcmf_txflowblock(bus->sdiodev->dev, true);
Franky Linc8bf3482011-12-16 18:37:08 -08002532 }
Arend van Spriel5b435de2011-10-05 13:19:03 +02002533
Joe Perches8ae74652012-01-15 00:38:38 -08002534#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +02002535 if (pktq_plen(&bus->txq, prec) > qcount[prec])
2536 qcount[prec] = pktq_plen(&bus->txq, prec);
2537#endif
Franky Linf1e68c22012-09-13 21:12:00 +02002538
2539 spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2540 if (list_empty(&bus->dpc_tsklst)) {
2541 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2542
2543 brcmf_sdbrcm_adddpctsk(bus);
2544 queue_work(bus->brcmf_wq, &bus->datawork);
2545 } else {
2546 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002547 }
2548
2549 return ret;
2550}
2551
2552static int
Franky Line92eedf2011-11-22 17:21:50 -08002553brcmf_sdbrcm_membytes(struct brcmf_sdio *bus, bool write, u32 address, u8 *data,
Arend van Spriel5b435de2011-10-05 13:19:03 +02002554 uint size)
2555{
2556 int bcmerror = 0;
2557 u32 sdaddr;
2558 uint dsize;
2559
2560 /* Determine initial transfer parameters */
2561 sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
2562 if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
2563 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
2564 else
2565 dsize = size;
2566
2567 /* Set the backplane window to include the start address */
2568 bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev, address);
2569 if (bcmerror) {
2570 brcmf_dbg(ERROR, "window change failed\n");
2571 goto xfer_done;
2572 }
2573
2574 /* Do the transfer(s) */
2575 while (size) {
2576 brcmf_dbg(INFO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
2577 write ? "write" : "read", dsize,
2578 sdaddr, address & SBSDIO_SBWINDOW_MASK);
2579 bcmerror = brcmf_sdcard_rwdata(bus->sdiodev, write,
2580 sdaddr, data, dsize);
2581 if (bcmerror) {
2582 brcmf_dbg(ERROR, "membytes transfer failed\n");
2583 break;
2584 }
2585
2586 /* Adjust for next transfer (if any) */
2587 size -= dsize;
2588 if (size) {
2589 data += dsize;
2590 address += dsize;
2591 bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev,
2592 address);
2593 if (bcmerror) {
2594 brcmf_dbg(ERROR, "window change failed\n");
2595 break;
2596 }
2597 sdaddr = 0;
2598 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
2599 }
2600 }
2601
2602xfer_done:
2603 /* Return the window to backplane enumeration space for core access */
2604 if (brcmf_sdcard_set_sbaddr_window(bus->sdiodev, bus->sdiodev->sbwad))
2605 brcmf_dbg(ERROR, "FAILED to set window back to 0x%x\n",
2606 bus->sdiodev->sbwad);
2607
2608 return bcmerror;
2609}
2610
Joe Perches8ae74652012-01-15 00:38:38 -08002611#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +02002612#define CONSOLE_LINE_MAX 192
2613
Franky Line92eedf2011-11-22 17:21:50 -08002614static int brcmf_sdbrcm_readconsole(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02002615{
2616 struct brcmf_console *c = &bus->console;
2617 u8 line[CONSOLE_LINE_MAX], ch;
2618 u32 n, idx, addr;
2619 int rv;
2620
2621 /* Don't do anything until FWREADY updates console address */
2622 if (bus->console_addr == 0)
2623 return 0;
2624
2625 /* Read console log struct */
2626 addr = bus->console_addr + offsetof(struct rte_console, log_le);
2627 rv = brcmf_sdbrcm_membytes(bus, false, addr, (u8 *)&c->log_le,
2628 sizeof(c->log_le));
2629 if (rv < 0)
2630 return rv;
2631
2632 /* Allocate console buffer (one time only) */
2633 if (c->buf == NULL) {
2634 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2635 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2636 if (c->buf == NULL)
2637 return -ENOMEM;
2638 }
2639
2640 idx = le32_to_cpu(c->log_le.idx);
2641
2642 /* Protect against corrupt value */
2643 if (idx > c->bufsize)
2644 return -EBADE;
2645
2646 /* Skip reading the console buffer if the index pointer
2647 has not moved */
2648 if (idx == c->last)
2649 return 0;
2650
2651 /* Read the console buffer */
2652 addr = le32_to_cpu(c->log_le.buf);
2653 rv = brcmf_sdbrcm_membytes(bus, false, addr, c->buf, c->bufsize);
2654 if (rv < 0)
2655 return rv;
2656
2657 while (c->last != idx) {
2658 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2659 if (c->last == idx) {
2660 /* This would output a partial line.
2661 * Instead, back up
2662 * the buffer pointer and output this
2663 * line next time around.
2664 */
2665 if (c->last >= n)
2666 c->last -= n;
2667 else
2668 c->last = c->bufsize - n;
2669 goto break2;
2670 }
2671 ch = c->buf[c->last];
2672 c->last = (c->last + 1) % c->bufsize;
2673 if (ch == '\n')
2674 break;
2675 line[n] = ch;
2676 }
2677
2678 if (n > 0) {
2679 if (line[n - 1] == '\r')
2680 n--;
2681 line[n] = 0;
Joe Perches18aad4f2012-01-15 00:38:42 -08002682 pr_debug("CONSOLE: %s\n", line);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002683 }
2684 }
2685break2:
2686
2687 return 0;
2688}
Joe Perches8ae74652012-01-15 00:38:38 -08002689#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +02002690
Franky Line92eedf2011-11-22 17:21:50 -08002691static int brcmf_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
Arend van Spriel5b435de2011-10-05 13:19:03 +02002692{
2693 int i;
2694 int ret;
2695
2696 bus->ctrl_frame_stat = false;
Arend van Spriel5adfeb62011-11-22 17:21:38 -08002697 ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2698 SDIO_FUNC_2, F2SYNC, frame, len);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002699
2700 if (ret < 0) {
2701 /* On failure, abort the command and terminate the frame */
2702 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2703 ret);
Arend van Spriel80969832012-06-09 22:51:44 +02002704 bus->sdcnt.tx_sderrs++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002705
2706 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2707
Franky Lin3bba8292012-05-04 18:27:33 -07002708 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2709 SFC_WF_TERM, NULL);
Arend van Spriel80969832012-06-09 22:51:44 +02002710 bus->sdcnt.f1regdata++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002711
2712 for (i = 0; i < 3; i++) {
2713 u8 hi, lo;
Franky Lin45db3392012-05-04 18:27:32 -07002714 hi = brcmf_sdio_regrb(bus->sdiodev,
2715 SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2716 lo = brcmf_sdio_regrb(bus->sdiodev,
2717 SBSDIO_FUNC1_WFRAMEBCLO, NULL);
Arend van Spriel80969832012-06-09 22:51:44 +02002718 bus->sdcnt.f1regdata += 2;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002719 if (hi == 0 && lo == 0)
2720 break;
2721 }
2722 return ret;
2723 }
2724
2725 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2726
2727 return ret;
2728}
2729
Franky Linfcf094f2011-12-16 18:37:16 -08002730static int
Franky Lin47a1ce72011-11-22 17:21:55 -08002731brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
Arend van Spriel5b435de2011-10-05 13:19:03 +02002732{
2733 u8 *frame;
2734 u16 len;
2735 u32 swheader;
2736 uint retries = 0;
2737 u8 doff = 0;
2738 int ret = -1;
Franky Lin47a1ce72011-11-22 17:21:55 -08002739 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
Arend van Spriel0a332e42012-02-09 21:09:02 +01002740 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
Franky Lin47a1ce72011-11-22 17:21:55 -08002741 struct brcmf_sdio *bus = sdiodev->bus;
Franky Linf1e68c22012-09-13 21:12:00 +02002742 unsigned long flags;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002743
2744 brcmf_dbg(TRACE, "Enter\n");
2745
2746 /* Back the pointer to make a room for bus header */
2747 frame = msg - SDPCM_HDRLEN;
2748 len = (msglen += SDPCM_HDRLEN);
2749
2750 /* Add alignment padding (optional for ctl frames) */
2751 doff = ((unsigned long)frame % BRCMF_SDALIGN);
2752 if (doff) {
2753 frame -= doff;
2754 len += doff;
2755 msglen += doff;
2756 memset(frame, 0, doff + SDPCM_HDRLEN);
2757 }
2758 /* precondition: doff < BRCMF_SDALIGN */
2759 doff += SDPCM_HDRLEN;
2760
2761 /* Round send length to next SDIO block */
2762 if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2763 u16 pad = bus->blocksize - (len % bus->blocksize);
2764 if ((pad <= bus->roundup) && (pad < bus->blocksize))
2765 len += pad;
2766 } else if (len % BRCMF_SDALIGN) {
2767 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
2768 }
2769
2770 /* Satisfy length-alignment requirements */
2771 if (len & (ALIGNMENT - 1))
2772 len = roundup(len, ALIGNMENT);
2773
2774 /* precondition: IS_ALIGNED((unsigned long)frame, 2) */
2775
2776 /* Need to lock here to protect txseq and SDIO tx calls */
2777 down(&bus->sdsem);
2778
Arend van Spriel5b435de2011-10-05 13:19:03 +02002779 /* Make sure backplane clock is on */
2780 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
2781
2782 /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
2783 *(__le16 *) frame = cpu_to_le16((u16) msglen);
2784 *(((__le16 *) frame) + 1) = cpu_to_le16(~msglen);
2785
2786 /* Software tag: channel, sequence number, data offset */
2787 swheader =
2788 ((SDPCM_CONTROL_CHANNEL << SDPCM_CHANNEL_SHIFT) &
2789 SDPCM_CHANNEL_MASK)
2790 | bus->tx_seq | ((doff << SDPCM_DOFFSET_SHIFT) &
2791 SDPCM_DOFFSET_MASK);
2792 put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
2793 put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
2794
2795 if (!data_ok(bus)) {
2796 brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
2797 bus->tx_max, bus->tx_seq);
2798 bus->ctrl_frame_stat = true;
2799 /* Send from dpc */
2800 bus->ctrl_frame_buf = frame;
2801 bus->ctrl_frame_len = len;
2802
2803 brcmf_sdbrcm_wait_for_event(bus, &bus->ctrl_frame_stat);
2804
Joe Perches23677ce2012-02-09 11:17:23 +00002805 if (!bus->ctrl_frame_stat) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02002806 brcmf_dbg(INFO, "ctrl_frame_stat == false\n");
2807 ret = 0;
2808 } else {
2809 brcmf_dbg(INFO, "ctrl_frame_stat == true\n");
2810 ret = -1;
2811 }
2812 }
2813
2814 if (ret == -1) {
Joe Perches1e023822012-01-15 00:38:40 -08002815 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
2816 frame, len, "Tx Frame:\n");
2817 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
2818 BRCMF_HDRS_ON(),
2819 frame, min_t(u16, len, 16), "TxHdr:\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02002820
2821 do {
2822 ret = brcmf_tx_frame(bus, frame, len);
2823 } while (ret < 0 && retries++ < TXRETRIES);
2824 }
2825
Franky Linf1e68c22012-09-13 21:12:00 +02002826 spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2827 if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) &&
2828 list_empty(&bus->dpc_tsklst)) {
2829 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2830
Arend van Spriel5b435de2011-10-05 13:19:03 +02002831 bus->activity = false;
2832 brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
Franky Linf1e68c22012-09-13 21:12:00 +02002833 } else {
2834 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
Arend van Spriel5b435de2011-10-05 13:19:03 +02002835 }
2836
2837 up(&bus->sdsem);
2838
2839 if (ret)
Arend van Spriel80969832012-06-09 22:51:44 +02002840 bus->sdcnt.tx_ctlerrs++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002841 else
Arend van Spriel80969832012-06-09 22:51:44 +02002842 bus->sdcnt.tx_ctlpkts++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02002843
2844 return ret ? -EIO : 0;
2845}
2846
Arend van Spriel80969832012-06-09 22:51:44 +02002847#ifdef DEBUG
Arend van Spriel4fc0d012012-06-14 12:16:57 +02002848static inline bool brcmf_sdio_valid_shared_address(u32 addr)
2849{
2850 return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
2851}
2852
2853static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
2854 struct sdpcm_shared *sh)
2855{
2856 u32 addr;
2857 int rv;
2858 u32 shaddr = 0;
2859 struct sdpcm_shared_le sh_le;
2860 __le32 addr_le;
2861
2862 shaddr = bus->ramsize - 4;
2863
2864 /*
2865 * Read last word in socram to determine
2866 * address of sdpcm_shared structure
2867 */
2868 rv = brcmf_sdbrcm_membytes(bus, false, shaddr,
2869 (u8 *)&addr_le, 4);
2870 if (rv < 0)
2871 return rv;
2872
2873 addr = le32_to_cpu(addr_le);
2874
2875 brcmf_dbg(INFO, "sdpcm_shared address 0x%08X\n", addr);
2876
2877 /*
2878 * Check if addr is valid.
2879 * NVRAM length at the end of memory should have been overwritten.
2880 */
2881 if (!brcmf_sdio_valid_shared_address(addr)) {
2882 brcmf_dbg(ERROR, "invalid sdpcm_shared address 0x%08X\n",
2883 addr);
2884 return -EINVAL;
2885 }
2886
2887 /* Read hndrte_shared structure */
2888 rv = brcmf_sdbrcm_membytes(bus, false, addr, (u8 *)&sh_le,
2889 sizeof(struct sdpcm_shared_le));
2890 if (rv < 0)
2891 return rv;
2892
2893 /* Endianness */
2894 sh->flags = le32_to_cpu(sh_le.flags);
2895 sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
2896 sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
2897 sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
2898 sh->assert_line = le32_to_cpu(sh_le.assert_line);
2899 sh->console_addr = le32_to_cpu(sh_le.console_addr);
2900 sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
2901
2902 if ((sh->flags & SDPCM_SHARED_VERSION_MASK) != SDPCM_SHARED_VERSION) {
2903 brcmf_dbg(ERROR,
2904 "sdpcm_shared version mismatch: dhd %d dongle %d\n",
2905 SDPCM_SHARED_VERSION,
2906 sh->flags & SDPCM_SHARED_VERSION_MASK);
2907 return -EPROTO;
2908 }
2909
2910 return 0;
2911}
2912
2913static int brcmf_sdio_dump_console(struct brcmf_sdio *bus,
2914 struct sdpcm_shared *sh, char __user *data,
2915 size_t count)
2916{
2917 u32 addr, console_ptr, console_size, console_index;
2918 char *conbuf = NULL;
2919 __le32 sh_val;
2920 int rv;
2921 loff_t pos = 0;
2922 int nbytes = 0;
2923
2924 /* obtain console information from device memory */
2925 addr = sh->console_addr + offsetof(struct rte_console, log_le);
2926 rv = brcmf_sdbrcm_membytes(bus, false, addr,
2927 (u8 *)&sh_val, sizeof(u32));
2928 if (rv < 0)
2929 return rv;
2930 console_ptr = le32_to_cpu(sh_val);
2931
2932 addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
2933 rv = brcmf_sdbrcm_membytes(bus, false, addr,
2934 (u8 *)&sh_val, sizeof(u32));
2935 if (rv < 0)
2936 return rv;
2937 console_size = le32_to_cpu(sh_val);
2938
2939 addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
2940 rv = brcmf_sdbrcm_membytes(bus, false, addr,
2941 (u8 *)&sh_val, sizeof(u32));
2942 if (rv < 0)
2943 return rv;
2944 console_index = le32_to_cpu(sh_val);
2945
2946 /* allocate buffer for console data */
2947 if (console_size <= CONSOLE_BUFFER_MAX)
2948 conbuf = vzalloc(console_size+1);
2949
2950 if (!conbuf)
2951 return -ENOMEM;
2952
2953 /* obtain the console data from device */
2954 conbuf[console_size] = '\0';
2955 rv = brcmf_sdbrcm_membytes(bus, false, console_ptr, (u8 *)conbuf,
2956 console_size);
2957 if (rv < 0)
2958 goto done;
2959
2960 rv = simple_read_from_buffer(data, count, &pos,
2961 conbuf + console_index,
2962 console_size - console_index);
2963 if (rv < 0)
2964 goto done;
2965
2966 nbytes = rv;
2967 if (console_index > 0) {
2968 pos = 0;
2969 rv = simple_read_from_buffer(data+nbytes, count, &pos,
2970 conbuf, console_index - 1);
2971 if (rv < 0)
2972 goto done;
2973 rv += nbytes;
2974 }
2975done:
2976 vfree(conbuf);
2977 return rv;
2978}
2979
2980static int brcmf_sdio_trap_info(struct brcmf_sdio *bus, struct sdpcm_shared *sh,
2981 char __user *data, size_t count)
2982{
2983 int error, res;
2984 char buf[350];
2985 struct brcmf_trap_info tr;
2986 int nbytes;
2987 loff_t pos = 0;
2988
2989 if ((sh->flags & SDPCM_SHARED_TRAP) == 0)
2990 return 0;
2991
2992 error = brcmf_sdbrcm_membytes(bus, false, sh->trap_addr, (u8 *)&tr,
2993 sizeof(struct brcmf_trap_info));
2994 if (error < 0)
2995 return error;
2996
2997 nbytes = brcmf_sdio_dump_console(bus, sh, data, count);
2998 if (nbytes < 0)
2999 return nbytes;
3000
3001 res = scnprintf(buf, sizeof(buf),
3002 "dongle trap info: type 0x%x @ epc 0x%08x\n"
3003 " cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
3004 " lr 0x%08x pc 0x%08x offset 0x%x\n"
3005 " r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n"
3006 " r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n",
3007 le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
3008 le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
3009 le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
Arend van Spriel9bd02c62012-06-26 21:26:40 +02003010 le32_to_cpu(tr.pc), sh->trap_addr,
Arend van Spriel4fc0d012012-06-14 12:16:57 +02003011 le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
3012 le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
3013 le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
3014 le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));
3015
3016 error = simple_read_from_buffer(data+nbytes, count, &pos, buf, res);
3017 if (error < 0)
3018 return error;
3019
3020 nbytes += error;
3021 return nbytes;
3022}
3023
3024static int brcmf_sdio_assert_info(struct brcmf_sdio *bus,
3025 struct sdpcm_shared *sh, char __user *data,
3026 size_t count)
3027{
3028 int error = 0;
3029 char buf[200];
3030 char file[80] = "?";
3031 char expr[80] = "<???>";
3032 int res;
3033 loff_t pos = 0;
3034
3035 if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
3036 brcmf_dbg(INFO, "firmware not built with -assert\n");
3037 return 0;
3038 } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
3039 brcmf_dbg(INFO, "no assert in dongle\n");
3040 return 0;
3041 }
3042
3043 if (sh->assert_file_addr != 0) {
3044 error = brcmf_sdbrcm_membytes(bus, false, sh->assert_file_addr,
3045 (u8 *)file, 80);
3046 if (error < 0)
3047 return error;
3048 }
3049 if (sh->assert_exp_addr != 0) {
3050 error = brcmf_sdbrcm_membytes(bus, false, sh->assert_exp_addr,
3051 (u8 *)expr, 80);
3052 if (error < 0)
3053 return error;
3054 }
3055
3056 res = scnprintf(buf, sizeof(buf),
3057 "dongle assert: %s:%d: assert(%s)\n",
3058 file, sh->assert_line, expr);
3059 return simple_read_from_buffer(data, count, &pos, buf, res);
3060}
3061
3062static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
3063{
3064 int error;
3065 struct sdpcm_shared sh;
3066
3067 down(&bus->sdsem);
3068 error = brcmf_sdio_readshared(bus, &sh);
3069 up(&bus->sdsem);
3070
3071 if (error < 0)
3072 return error;
3073
3074 if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
3075 brcmf_dbg(INFO, "firmware not built with -assert\n");
3076 else if (sh.flags & SDPCM_SHARED_ASSERT)
3077 brcmf_dbg(ERROR, "assertion in dongle\n");
3078
3079 if (sh.flags & SDPCM_SHARED_TRAP)
3080 brcmf_dbg(ERROR, "firmware trap in dongle\n");
3081
3082 return 0;
3083}
3084
3085static int brcmf_sdbrcm_died_dump(struct brcmf_sdio *bus, char __user *data,
3086 size_t count, loff_t *ppos)
3087{
3088 int error = 0;
3089 struct sdpcm_shared sh;
3090 int nbytes = 0;
3091 loff_t pos = *ppos;
3092
3093 if (pos != 0)
3094 return 0;
3095
3096 down(&bus->sdsem);
3097 error = brcmf_sdio_readshared(bus, &sh);
3098 if (error < 0)
3099 goto done;
3100
3101 error = brcmf_sdio_assert_info(bus, &sh, data, count);
3102 if (error < 0)
3103 goto done;
3104
3105 nbytes = error;
3106 error = brcmf_sdio_trap_info(bus, &sh, data, count);
3107 if (error < 0)
3108 goto done;
3109
3110 error += nbytes;
3111 *ppos += error;
3112done:
3113 up(&bus->sdsem);
3114 return error;
3115}
3116
3117static ssize_t brcmf_sdio_forensic_read(struct file *f, char __user *data,
3118 size_t count, loff_t *ppos)
3119{
3120 struct brcmf_sdio *bus = f->private_data;
3121 int res;
3122
3123 res = brcmf_sdbrcm_died_dump(bus, data, count, ppos);
3124 if (res > 0)
3125 *ppos += res;
3126 return (ssize_t)res;
3127}
3128
3129static const struct file_operations brcmf_sdio_forensic_ops = {
3130 .owner = THIS_MODULE,
3131 .open = simple_open,
3132 .read = brcmf_sdio_forensic_read
3133};
3134
Arend van Spriel80969832012-06-09 22:51:44 +02003135static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3136{
3137 struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
Arend van Spriel4fc0d012012-06-14 12:16:57 +02003138 struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);
Arend van Spriel80969832012-06-09 22:51:44 +02003139
Arend van Spriel4fc0d012012-06-14 12:16:57 +02003140 if (IS_ERR_OR_NULL(dentry))
3141 return;
3142
3143 debugfs_create_file("forensics", S_IRUGO, dentry, bus,
3144 &brcmf_sdio_forensic_ops);
Arend van Spriel80969832012-06-09 22:51:44 +02003145 brcmf_debugfs_create_sdio_count(drvr, &bus->sdcnt);
3146}
3147#else
Arend van Spriel4fc0d012012-06-14 12:16:57 +02003148static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
3149{
3150 return 0;
3151}
3152
Arend van Spriel80969832012-06-09 22:51:44 +02003153static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3154{
3155}
3156#endif /* DEBUG */
3157
Franky Linfcf094f2011-12-16 18:37:16 -08003158static int
Franky Lin532cdd32011-11-22 17:21:54 -08003159brcmf_sdbrcm_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003160{
3161 int timeleft;
3162 uint rxlen = 0;
3163 bool pending;
Franky Lin532cdd32011-11-22 17:21:54 -08003164 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
Arend van Spriel0a332e42012-02-09 21:09:02 +01003165 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
Franky Lin532cdd32011-11-22 17:21:54 -08003166 struct brcmf_sdio *bus = sdiodev->bus;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003167
3168 brcmf_dbg(TRACE, "Enter\n");
3169
3170 /* Wait until control frame is available */
3171 timeleft = brcmf_sdbrcm_dcmd_resp_wait(bus, &bus->rxlen, &pending);
3172
3173 down(&bus->sdsem);
3174 rxlen = bus->rxlen;
3175 memcpy(msg, bus->rxctl, min(msglen, rxlen));
3176 bus->rxlen = 0;
3177 up(&bus->sdsem);
3178
3179 if (rxlen) {
3180 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
3181 rxlen, msglen);
3182 } else if (timeleft == 0) {
3183 brcmf_dbg(ERROR, "resumed on timeout\n");
Arend van Spriel4fc0d012012-06-14 12:16:57 +02003184 brcmf_sdbrcm_checkdied(bus);
Joe Perches23677ce2012-02-09 11:17:23 +00003185 } else if (pending) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003186 brcmf_dbg(CTL, "cancelled\n");
3187 return -ERESTARTSYS;
3188 } else {
3189 brcmf_dbg(CTL, "resumed for unknown reason?\n");
Arend van Spriel4fc0d012012-06-14 12:16:57 +02003190 brcmf_sdbrcm_checkdied(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003191 }
3192
3193 if (rxlen)
Arend van Spriel80969832012-06-09 22:51:44 +02003194 bus->sdcnt.rx_ctlpkts++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003195 else
Arend van Spriel80969832012-06-09 22:51:44 +02003196 bus->sdcnt.rx_ctlerrs++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003197
3198 return rxlen ? (int)rxlen : -ETIMEDOUT;
3199}
3200
Franky Line92eedf2011-11-22 17:21:50 -08003201static int brcmf_sdbrcm_write_vars(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003202{
3203 int bcmerror = 0;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003204 u32 varaddr;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003205 u32 varsizew;
3206 __le32 varsizew_le;
Joe Perches8ae74652012-01-15 00:38:38 -08003207#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +02003208 char *nvram_ularray;
Joe Perches8ae74652012-01-15 00:38:38 -08003209#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +02003210
3211 /* Even if there are no vars are to be written, we still
3212 need to set the ramsize. */
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003213 varaddr = (bus->ramsize - 4) - bus->varsz;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003214
3215 if (bus->vars) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003216 /* Write the vars list */
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003217 bcmerror = brcmf_sdbrcm_membytes(bus, true, varaddr,
3218 bus->vars, bus->varsz);
Joe Perches8ae74652012-01-15 00:38:38 -08003219#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +02003220 /* Verify NVRAM bytes */
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003221 brcmf_dbg(INFO, "Compare NVRAM dl & ul; varsize=%d\n",
3222 bus->varsz);
3223 nvram_ularray = kmalloc(bus->varsz, GFP_ATOMIC);
3224 if (!nvram_ularray)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003225 return -ENOMEM;
3226
3227 /* Upload image to verify downloaded contents. */
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003228 memset(nvram_ularray, 0xaa, bus->varsz);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003229
3230 /* Read the vars list to temp buffer for comparison */
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003231 bcmerror = brcmf_sdbrcm_membytes(bus, false, varaddr,
3232 nvram_ularray, bus->varsz);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003233 if (bcmerror) {
3234 brcmf_dbg(ERROR, "error %d on reading %d nvram bytes at 0x%08x\n",
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003235 bcmerror, bus->varsz, varaddr);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003236 }
3237 /* Compare the org NVRAM with the one read from RAM */
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003238 if (memcmp(bus->vars, nvram_ularray, bus->varsz))
Arend van Spriel5b435de2011-10-05 13:19:03 +02003239 brcmf_dbg(ERROR, "Downloaded NVRAM image is corrupted\n");
3240 else
3241 brcmf_dbg(ERROR, "Download/Upload/Compare of NVRAM ok\n");
3242
3243 kfree(nvram_ularray);
Joe Perches8ae74652012-01-15 00:38:38 -08003244#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +02003245 }
3246
3247 /* adjust to the user specified RAM */
3248 brcmf_dbg(INFO, "Physical memory size: %d\n", bus->ramsize);
3249 brcmf_dbg(INFO, "Vars are at %d, orig varsize is %d\n",
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003250 varaddr, bus->varsz);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003251
3252 /*
3253 * Determine the length token:
3254 * Varsize, converted to words, in lower 16-bits, checksum
3255 * in upper 16-bits.
3256 */
3257 if (bcmerror) {
3258 varsizew = 0;
3259 varsizew_le = cpu_to_le32(0);
3260 } else {
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003261 varsizew = bus->varsz / 4;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003262 varsizew = (~varsizew << 16) | (varsizew & 0x0000FFFF);
3263 varsizew_le = cpu_to_le32(varsizew);
3264 }
3265
3266 brcmf_dbg(INFO, "New varsize is %d, length token=0x%08x\n",
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003267 bus->varsz, varsizew);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003268
3269 /* Write the length token to the last word */
3270 bcmerror = brcmf_sdbrcm_membytes(bus, true, (bus->ramsize - 4),
3271 (u8 *)&varsizew_le, 4);
3272
3273 return bcmerror;
3274}
3275
Franky Line92eedf2011-11-22 17:21:50 -08003276static int brcmf_sdbrcm_download_state(struct brcmf_sdio *bus, bool enter)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003277{
Arend van Spriel5b435de2011-10-05 13:19:03 +02003278 int bcmerror = 0;
Franky Lin99ba15c2011-11-04 22:23:42 +01003279 struct chip_info *ci = bus->ci;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003280
3281 /* To enter download state, disable ARM and reset SOCRAM.
3282 * To exit download state, simply reset ARM (default is RAM boot).
3283 */
3284 if (enter) {
3285 bus->alp_only = true;
3286
Franky Lin086a2e02011-11-10 20:30:23 +01003287 ci->coredisable(bus->sdiodev, ci, BCMA_CORE_ARM_CM3);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003288
Franky Lind77e70f2011-11-10 20:30:24 +01003289 ci->resetcore(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003290
3291 /* Clear the top bit of memory */
3292 if (bus->ramsize) {
3293 u32 zeros = 0;
3294 brcmf_sdbrcm_membytes(bus, true, bus->ramsize - 4,
3295 (u8 *)&zeros, 4);
3296 }
3297 } else {
Franky Lin6ca687d2011-11-10 20:30:21 +01003298 if (!ci->iscoreup(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM)) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003299 brcmf_dbg(ERROR, "SOCRAM core is down after reset?\n");
3300 bcmerror = -EBADE;
3301 goto fail;
3302 }
3303
3304 bcmerror = brcmf_sdbrcm_write_vars(bus);
3305 if (bcmerror) {
3306 brcmf_dbg(ERROR, "no vars written to RAM\n");
3307 bcmerror = 0;
3308 }
3309
3310 w_sdreg32(bus, 0xFFFFFFFF,
Franky Lin58692752012-05-04 18:27:36 -07003311 offsetof(struct sdpcmd_regs, intstatus));
Arend van Spriel5b435de2011-10-05 13:19:03 +02003312
Franky Lind77e70f2011-11-10 20:30:24 +01003313 ci->resetcore(bus->sdiodev, ci, BCMA_CORE_ARM_CM3);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003314
3315 /* Allow HT Clock now that the ARM is running. */
3316 bus->alp_only = false;
3317
Franky Lin712ac5b2011-12-16 18:37:09 -08003318 bus->sdiodev->bus_if->state = BRCMF_BUS_LOAD;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003319 }
3320fail:
3321 return bcmerror;
3322}
3323
Franky Line92eedf2011-11-22 17:21:50 -08003324static int brcmf_sdbrcm_get_image(char *buf, int len, struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003325{
3326 if (bus->firmware->size < bus->fw_ptr + len)
3327 len = bus->firmware->size - bus->fw_ptr;
3328
3329 memcpy(buf, &bus->firmware->data[bus->fw_ptr], len);
3330 bus->fw_ptr += len;
3331 return len;
3332}
3333
Franky Line92eedf2011-11-22 17:21:50 -08003334static int brcmf_sdbrcm_download_code_file(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003335{
3336 int offset = 0;
3337 uint len;
3338 u8 *memblock = NULL, *memptr;
3339 int ret;
3340
3341 brcmf_dbg(INFO, "Enter\n");
3342
Arend van Spriel52e14092012-02-09 21:09:09 +01003343 ret = request_firmware(&bus->firmware, BRCMF_SDIO_FW_NAME,
Arend van Spriel5b435de2011-10-05 13:19:03 +02003344 &bus->sdiodev->func[2]->dev);
3345 if (ret) {
3346 brcmf_dbg(ERROR, "Fail to request firmware %d\n", ret);
3347 return ret;
3348 }
3349 bus->fw_ptr = 0;
3350
3351 memptr = memblock = kmalloc(MEMBLOCK + BRCMF_SDALIGN, GFP_ATOMIC);
3352 if (memblock == NULL) {
3353 ret = -ENOMEM;
3354 goto err;
3355 }
3356 if ((u32)(unsigned long)memblock % BRCMF_SDALIGN)
3357 memptr += (BRCMF_SDALIGN -
3358 ((u32)(unsigned long)memblock % BRCMF_SDALIGN));
3359
3360 /* Download image */
3361 while ((len =
3362 brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus))) {
3363 ret = brcmf_sdbrcm_membytes(bus, true, offset, memptr, len);
3364 if (ret) {
3365 brcmf_dbg(ERROR, "error %d on writing %d membytes at 0x%08x\n",
3366 ret, MEMBLOCK, offset);
3367 goto err;
3368 }
3369
3370 offset += MEMBLOCK;
3371 }
3372
3373err:
3374 kfree(memblock);
3375
3376 release_firmware(bus->firmware);
3377 bus->fw_ptr = 0;
3378
3379 return ret;
3380}
3381
3382/*
3383 * ProcessVars:Takes a buffer of "<var>=<value>\n" lines read from a file
3384 * and ending in a NUL.
3385 * Removes carriage returns, empty lines, comment lines, and converts
3386 * newlines to NULs.
3387 * Shortens buffer as needed and pads with NULs. End of buffer is marked
3388 * by two NULs.
3389*/
3390
Franky Lind610cde2012-06-26 21:26:37 +02003391static int brcmf_process_nvram_vars(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003392{
Franky Lind610cde2012-06-26 21:26:37 +02003393 char *varbuf;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003394 char *dp;
3395 bool findNewline;
3396 int column;
Franky Lind610cde2012-06-26 21:26:37 +02003397 int ret = 0;
3398 uint buf_len, n, len;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003399
Franky Lind610cde2012-06-26 21:26:37 +02003400 len = bus->firmware->size;
3401 varbuf = vmalloc(len);
3402 if (!varbuf)
3403 return -ENOMEM;
3404
3405 memcpy(varbuf, bus->firmware->data, len);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003406 dp = varbuf;
3407
3408 findNewline = false;
3409 column = 0;
3410
3411 for (n = 0; n < len; n++) {
3412 if (varbuf[n] == 0)
3413 break;
3414 if (varbuf[n] == '\r')
3415 continue;
3416 if (findNewline && varbuf[n] != '\n')
3417 continue;
3418 findNewline = false;
3419 if (varbuf[n] == '#') {
3420 findNewline = true;
3421 continue;
3422 }
3423 if (varbuf[n] == '\n') {
3424 if (column == 0)
3425 continue;
3426 *dp++ = 0;
3427 column = 0;
3428 continue;
3429 }
3430 *dp++ = varbuf[n];
3431 column++;
3432 }
3433 buf_len = dp - varbuf;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003434 while (dp < varbuf + n)
3435 *dp++ = 0;
3436
Franky Lind610cde2012-06-26 21:26:37 +02003437 kfree(bus->vars);
Arend van Spriel6d4ef682012-06-26 21:26:38 +02003438 /* roundup needed for download to device */
3439 bus->varsz = roundup(buf_len + 1, 4);
Franky Lind610cde2012-06-26 21:26:37 +02003440 bus->vars = kmalloc(bus->varsz, GFP_KERNEL);
3441 if (bus->vars == NULL) {
3442 bus->varsz = 0;
3443 ret = -ENOMEM;
3444 goto err;
3445 }
3446
3447 /* copy the processed variables and add null termination */
3448 memcpy(bus->vars, varbuf, buf_len);
3449 bus->vars[buf_len] = 0;
3450err:
3451 vfree(varbuf);
3452 return ret;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003453}
3454
Franky Line92eedf2011-11-22 17:21:50 -08003455static int brcmf_sdbrcm_download_nvram(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003456{
Arend van Spriel5b435de2011-10-05 13:19:03 +02003457 int ret;
3458
Franky Lind610cde2012-06-26 21:26:37 +02003459 if (bus->sdiodev->bus_if->drvr_up)
3460 return -EISCONN;
3461
Arend van Spriel52e14092012-02-09 21:09:09 +01003462 ret = request_firmware(&bus->firmware, BRCMF_SDIO_NV_NAME,
Arend van Spriel5b435de2011-10-05 13:19:03 +02003463 &bus->sdiodev->func[2]->dev);
3464 if (ret) {
3465 brcmf_dbg(ERROR, "Fail to request nvram %d\n", ret);
3466 return ret;
3467 }
Arend van Spriel5b435de2011-10-05 13:19:03 +02003468
Franky Lind610cde2012-06-26 21:26:37 +02003469 ret = brcmf_process_nvram_vars(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003470
3471 release_firmware(bus->firmware);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003472
3473 return ret;
3474}
3475
Franky Line92eedf2011-11-22 17:21:50 -08003476static int _brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003477{
3478 int bcmerror = -1;
3479
3480 /* Keep arm in reset */
3481 if (brcmf_sdbrcm_download_state(bus, true)) {
3482 brcmf_dbg(ERROR, "error placing ARM core in reset\n");
3483 goto err;
3484 }
3485
3486 /* External image takes precedence if specified */
3487 if (brcmf_sdbrcm_download_code_file(bus)) {
3488 brcmf_dbg(ERROR, "dongle image file download failed\n");
3489 goto err;
3490 }
3491
3492 /* External nvram takes precedence if specified */
3493 if (brcmf_sdbrcm_download_nvram(bus))
3494 brcmf_dbg(ERROR, "dongle nvram file download failed\n");
3495
3496 /* Take arm out of reset */
3497 if (brcmf_sdbrcm_download_state(bus, false)) {
3498 brcmf_dbg(ERROR, "error getting out of ARM core reset\n");
3499 goto err;
3500 }
3501
3502 bcmerror = 0;
3503
3504err:
3505 return bcmerror;
3506}
3507
3508static bool
Franky Line92eedf2011-11-22 17:21:50 -08003509brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003510{
3511 bool ret;
3512
3513 /* Download the firmware */
3514 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3515
3516 ret = _brcmf_sdbrcm_download_firmware(bus) == 0;
3517
3518 brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
3519
3520 return ret;
3521}
3522
Franky Lin99a0b8f2011-12-16 18:37:14 -08003523static int brcmf_sdbrcm_bus_init(struct device *dev)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003524{
Franky Linfa20b912011-11-22 17:21:57 -08003525 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
Arend van Spriel0a332e42012-02-09 21:09:02 +01003526 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
Franky Linfa20b912011-11-22 17:21:57 -08003527 struct brcmf_sdio *bus = sdiodev->bus;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003528 unsigned long timeout;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003529 u8 ready, enable;
3530 int err, ret = 0;
3531 u8 saveclk;
3532
3533 brcmf_dbg(TRACE, "Enter\n");
3534
3535 /* try to download image and nvram to the dongle */
Franky Linfa20b912011-11-22 17:21:57 -08003536 if (bus_if->state == BRCMF_BUS_DOWN) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003537 if (!(brcmf_sdbrcm_download_firmware(bus)))
3538 return -1;
3539 }
3540
Franky Lin712ac5b2011-12-16 18:37:09 -08003541 if (!bus->sdiodev->bus_if->drvr)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003542 return 0;
3543
3544 /* Start the watchdog timer */
Arend van Spriel80969832012-06-09 22:51:44 +02003545 bus->sdcnt.tickcnt = 0;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003546 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3547
3548 down(&bus->sdsem);
3549
3550 /* Make sure backplane clock is on, needed to generate F2 interrupt */
3551 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3552 if (bus->clkstate != CLK_AVAIL)
3553 goto exit;
3554
3555 /* Force clocks on backplane to be sure F2 interrupt propagates */
Franky Lin45db3392012-05-04 18:27:32 -07003556 saveclk = brcmf_sdio_regrb(bus->sdiodev,
3557 SBSDIO_FUNC1_CHIPCLKCSR, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003558 if (!err) {
Franky Lin3bba8292012-05-04 18:27:33 -07003559 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3560 (saveclk | SBSDIO_FORCE_HT), &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003561 }
3562 if (err) {
3563 brcmf_dbg(ERROR, "Failed to force clock for F2: err %d\n", err);
3564 goto exit;
3565 }
3566
3567 /* Enable function 2 (frame transfers) */
3568 w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
Franky Lin58692752012-05-04 18:27:36 -07003569 offsetof(struct sdpcmd_regs, tosbmailboxdata));
Arend van Spriel5b435de2011-10-05 13:19:03 +02003570 enable = (SDIO_FUNC_ENABLE_1 | SDIO_FUNC_ENABLE_2);
3571
Franky Lin3bba8292012-05-04 18:27:33 -07003572 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003573
3574 timeout = jiffies + msecs_to_jiffies(BRCMF_WAIT_F2RDY);
3575 ready = 0;
3576 while (enable != ready) {
Franky Lin45db3392012-05-04 18:27:32 -07003577 ready = brcmf_sdio_regrb(bus->sdiodev,
3578 SDIO_CCCR_IORx, NULL);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003579 if (time_after(jiffies, timeout))
3580 break;
3581 else if (time_after(jiffies, timeout - BRCMF_WAIT_F2RDY + 50))
3582 /* prevent busy waiting if it takes too long */
3583 msleep_interruptible(20);
3584 }
3585
3586 brcmf_dbg(INFO, "enable 0x%02x, ready 0x%02x\n", enable, ready);
3587
3588 /* If F2 successfully enabled, set core and enable interrupts */
3589 if (ready == enable) {
3590 /* Set up the interrupt mask and enable interrupts */
3591 bus->hostintmask = HOSTINTMASK;
3592 w_sdreg32(bus, bus->hostintmask,
Franky Lin58692752012-05-04 18:27:36 -07003593 offsetof(struct sdpcmd_regs, hostintmask));
Arend van Spriel5b435de2011-10-05 13:19:03 +02003594
Franky Lin3bba8292012-05-04 18:27:33 -07003595 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_WATERMARK, 8, &err);
Arend van Sprielc0e89f02012-02-09 21:09:04 +01003596 } else {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003597 /* Disable F2 again */
3598 enable = SDIO_FUNC_ENABLE_1;
Franky Lin3bba8292012-05-04 18:27:33 -07003599 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
Arend van Sprielc0e89f02012-02-09 21:09:04 +01003600 ret = -ENODEV;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003601 }
3602
3603 /* Restore previous clock setting */
Franky Lin3bba8292012-05-04 18:27:33 -07003604 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, saveclk, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003605
Franky Line2f93cc2012-04-27 18:56:58 -07003606 if (ret == 0) {
Franky Linba89bf12012-04-27 18:56:59 -07003607 ret = brcmf_sdio_intr_register(bus->sdiodev);
Franky Line2f93cc2012-04-27 18:56:58 -07003608 if (ret != 0)
3609 brcmf_dbg(ERROR, "intr register failed:%d\n", ret);
3610 }
3611
Arend van Spriel5b435de2011-10-05 13:19:03 +02003612 /* If we didn't come up, turn off backplane clock */
Franky Lind9126e02012-04-27 18:56:57 -07003613 if (bus_if->state != BRCMF_BUS_DATA)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003614 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3615
3616exit:
3617 up(&bus->sdsem);
3618
3619 return ret;
3620}
3621
3622void brcmf_sdbrcm_isr(void *arg)
3623{
Franky Line92eedf2011-11-22 17:21:50 -08003624 struct brcmf_sdio *bus = (struct brcmf_sdio *) arg;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003625
3626 brcmf_dbg(TRACE, "Enter\n");
3627
3628 if (!bus) {
3629 brcmf_dbg(ERROR, "bus is null pointer, exiting\n");
3630 return;
3631 }
3632
Franky Lin712ac5b2011-12-16 18:37:09 -08003633 if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003634 brcmf_dbg(ERROR, "bus is down. we have nothing to do\n");
3635 return;
3636 }
3637 /* Count the interrupt call */
Arend van Spriel80969832012-06-09 22:51:44 +02003638 bus->sdcnt.intrcount++;
Franky Lin1d382272012-09-13 21:11:59 +02003639 atomic_set(&bus->ipend, 1);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003640
Arend van Spriel5b435de2011-10-05 13:19:03 +02003641 /* Disable additional interrupts (is this needed now)? */
3642 if (!bus->intr)
3643 brcmf_dbg(ERROR, "isr w/o interrupt configured!\n");
3644
Franky Linf1e68c22012-09-13 21:12:00 +02003645 brcmf_sdbrcm_adddpctsk(bus);
3646 queue_work(bus->brcmf_wq, &bus->datawork);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003647}
3648
Franky Lincad2b262011-11-22 17:21:53 -08003649static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003650{
Joe Perches8ae74652012-01-15 00:38:38 -08003651#ifdef DEBUG
Franky Lincad2b262011-11-22 17:21:53 -08003652 struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev);
Joe Perches8ae74652012-01-15 00:38:38 -08003653#endif /* DEBUG */
Franky Linf1e68c22012-09-13 21:12:00 +02003654 unsigned long flags;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003655
3656 brcmf_dbg(TIMER, "Enter\n");
3657
Arend van Spriel5b435de2011-10-05 13:19:03 +02003658 down(&bus->sdsem);
3659
3660 /* Poll period: check device if appropriate. */
3661 if (bus->poll && (++bus->polltick >= bus->pollrate)) {
3662 u32 intstatus = 0;
3663
3664 /* Reset poll tick */
3665 bus->polltick = 0;
3666
3667 /* Check device if no interrupts */
Arend van Spriel80969832012-06-09 22:51:44 +02003668 if (!bus->intr ||
3669 (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003670
Franky Linf1e68c22012-09-13 21:12:00 +02003671 spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3672 if (list_empty(&bus->dpc_tsklst)) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003673 u8 devpend;
Franky Linf1e68c22012-09-13 21:12:00 +02003674 spin_unlock_irqrestore(&bus->dpc_tl_lock,
3675 flags);
Franky Lin45db3392012-05-04 18:27:32 -07003676 devpend = brcmf_sdio_regrb(bus->sdiodev,
3677 SDIO_CCCR_INTx,
3678 NULL);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003679 intstatus =
3680 devpend & (INTR_STATUS_FUNC1 |
3681 INTR_STATUS_FUNC2);
Franky Linf1e68c22012-09-13 21:12:00 +02003682 } else {
3683 spin_unlock_irqrestore(&bus->dpc_tl_lock,
3684 flags);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003685 }
3686
3687 /* If there is something, make like the ISR and
3688 schedule the DPC */
3689 if (intstatus) {
Arend van Spriel80969832012-06-09 22:51:44 +02003690 bus->sdcnt.pollcnt++;
Franky Lin1d382272012-09-13 21:11:59 +02003691 atomic_set(&bus->ipend, 1);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003692
Franky Linf1e68c22012-09-13 21:12:00 +02003693 brcmf_sdbrcm_adddpctsk(bus);
3694 queue_work(bus->brcmf_wq, &bus->datawork);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003695 }
3696 }
3697
3698 /* Update interrupt tracking */
Arend van Spriel80969832012-06-09 22:51:44 +02003699 bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003700 }
Joe Perches8ae74652012-01-15 00:38:38 -08003701#ifdef DEBUG
Arend van Spriel5b435de2011-10-05 13:19:03 +02003702 /* Poll for console output periodically */
Franky Lincad2b262011-11-22 17:21:53 -08003703 if (bus_if->state == BRCMF_BUS_DATA &&
Franky Lin8d169aa2011-11-22 17:21:52 -08003704 bus->console_interval != 0) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003705 bus->console.count += BRCMF_WD_POLL_MS;
3706 if (bus->console.count >= bus->console_interval) {
3707 bus->console.count -= bus->console_interval;
3708 /* Make sure backplane clock is on */
3709 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3710 if (brcmf_sdbrcm_readconsole(bus) < 0)
3711 /* stop on error */
3712 bus->console_interval = 0;
3713 }
3714 }
Joe Perches8ae74652012-01-15 00:38:38 -08003715#endif /* DEBUG */
Arend van Spriel5b435de2011-10-05 13:19:03 +02003716
3717 /* On idle timeout clear activity flag and/or turn off clock */
3718 if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
3719 if (++bus->idlecount >= bus->idletime) {
3720 bus->idlecount = 0;
3721 if (bus->activity) {
3722 bus->activity = false;
3723 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3724 } else {
3725 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3726 }
3727 }
3728 }
3729
3730 up(&bus->sdsem);
3731
Franky Lin1d382272012-09-13 21:11:59 +02003732 return (atomic_read(&bus->ipend) > 0);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003733}
3734
3735static bool brcmf_sdbrcm_chipmatch(u16 chipid)
3736{
Franky Lin4a1c02c2012-08-30 19:42:59 +02003737 if (chipid == BCM43241_CHIP_ID)
3738 return true;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003739 if (chipid == BCM4329_CHIP_ID)
3740 return true;
Franky Lince2d7d72011-12-08 15:06:39 -08003741 if (chipid == BCM4330_CHIP_ID)
3742 return true;
Franky Lin85a4a1c2012-06-26 21:26:39 +02003743 if (chipid == BCM4334_CHIP_ID)
3744 return true;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003745 return false;
3746}
3747
Franky Linf1e68c22012-09-13 21:12:00 +02003748static void brcmf_sdio_dataworker(struct work_struct *work)
3749{
3750 struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
3751 datawork);
3752 struct list_head *cur_hd, *tmp_hd;
3753 unsigned long flags;
3754
3755 spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3756 list_for_each_safe(cur_hd, tmp_hd, &bus->dpc_tsklst) {
3757 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
3758
3759 brcmf_sdbrcm_dpc(bus);
3760
3761 spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3762 list_del(cur_hd);
3763 kfree(cur_hd);
3764 }
3765 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
3766}
3767
Franky Line92eedf2011-11-22 17:21:50 -08003768static void brcmf_sdbrcm_release_malloc(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003769{
3770 brcmf_dbg(TRACE, "Enter\n");
3771
3772 kfree(bus->rxbuf);
3773 bus->rxctl = bus->rxbuf = NULL;
3774 bus->rxlen = 0;
3775
3776 kfree(bus->databuf);
3777 bus->databuf = NULL;
3778}
3779
Franky Line92eedf2011-11-22 17:21:50 -08003780static bool brcmf_sdbrcm_probe_malloc(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003781{
3782 brcmf_dbg(TRACE, "Enter\n");
3783
Franky Linb01a6b32011-12-16 18:37:03 -08003784 if (bus->sdiodev->bus_if->maxctl) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02003785 bus->rxblen =
Franky Linb01a6b32011-12-16 18:37:03 -08003786 roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
Arend van Spriel5b435de2011-10-05 13:19:03 +02003787 ALIGNMENT) + BRCMF_SDALIGN;
3788 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
3789 if (!(bus->rxbuf))
3790 goto fail;
3791 }
3792
3793 /* Allocate buffer to receive glomed packet */
3794 bus->databuf = kmalloc(MAX_DATA_BUF, GFP_ATOMIC);
3795 if (!(bus->databuf)) {
3796 /* release rxbuf which was already located as above */
3797 if (!bus->rxblen)
3798 kfree(bus->rxbuf);
3799 goto fail;
3800 }
3801
3802 /* Align the buffer */
3803 if ((unsigned long)bus->databuf % BRCMF_SDALIGN)
3804 bus->dataptr = bus->databuf + (BRCMF_SDALIGN -
3805 ((unsigned long)bus->databuf % BRCMF_SDALIGN));
3806 else
3807 bus->dataptr = bus->databuf;
3808
3809 return true;
3810
3811fail:
3812 return false;
3813}
3814
Arend van Spriel5b435de2011-10-05 13:19:03 +02003815static bool
Franky Line92eedf2011-11-22 17:21:50 -08003816brcmf_sdbrcm_probe_attach(struct brcmf_sdio *bus, u32 regsva)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003817{
3818 u8 clkctl = 0;
3819 int err = 0;
3820 int reg_addr;
3821 u32 reg_val;
Franky Lin99ba15c2011-11-04 22:23:42 +01003822 u8 idx;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003823
3824 bus->alp_only = true;
3825
Joe Perches18aad4f2012-01-15 00:38:42 -08003826 pr_debug("F1 signature read @0x18000000=0x%4x\n",
Franky Lin79ae3952012-05-04 18:27:34 -07003827 brcmf_sdio_regrl(bus->sdiodev, SI_ENUM_BASE, NULL));
Arend van Spriel5b435de2011-10-05 13:19:03 +02003828
3829 /*
Franky Lina97e4fc2011-11-04 22:23:35 +01003830 * Force PLL off until brcmf_sdio_chip_attach()
Arend van Spriel5b435de2011-10-05 13:19:03 +02003831 * programs PLL control regs
3832 */
3833
Franky Lin3bba8292012-05-04 18:27:33 -07003834 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3835 BRCMF_INIT_CLKCTL1, &err);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003836 if (!err)
Franky Lin45db3392012-05-04 18:27:32 -07003837 clkctl = brcmf_sdio_regrb(bus->sdiodev,
Arend van Spriel5b435de2011-10-05 13:19:03 +02003838 SBSDIO_FUNC1_CHIPCLKCSR, &err);
3839
3840 if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3841 brcmf_dbg(ERROR, "ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3842 err, BRCMF_INIT_CLKCTL1, clkctl);
3843 goto fail;
3844 }
3845
Franky Lina97e4fc2011-11-04 22:23:35 +01003846 if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci, regsva)) {
3847 brcmf_dbg(ERROR, "brcmf_sdio_chip_attach failed!\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02003848 goto fail;
3849 }
3850
3851 if (!brcmf_sdbrcm_chipmatch((u16) bus->ci->chip)) {
3852 brcmf_dbg(ERROR, "unsupported chip: 0x%04x\n", bus->ci->chip);
3853 goto fail;
3854 }
3855
Franky Line12afb62011-11-04 22:23:40 +01003856 brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci,
3857 SDIO_DRIVE_STRENGTH);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003858
Franky Lin454d2a82011-11-04 22:23:37 +01003859 /* Get info on the SOCRAM cores... */
Arend van Spriel5b435de2011-10-05 13:19:03 +02003860 bus->ramsize = bus->ci->ramsize;
3861 if (!(bus->ramsize)) {
3862 brcmf_dbg(ERROR, "failed to find SOCRAM memory!\n");
3863 goto fail;
3864 }
3865
3866 /* Set core control so an SDIO reset does a backplane reset */
Franky Lin99ba15c2011-11-04 22:23:42 +01003867 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
3868 reg_addr = bus->ci->c_inf[idx].base +
Arend van Spriel5b435de2011-10-05 13:19:03 +02003869 offsetof(struct sdpcmd_regs, corecontrol);
Franky Lin79ae3952012-05-04 18:27:34 -07003870 reg_val = brcmf_sdio_regrl(bus->sdiodev, reg_addr, NULL);
Franky Line13ce262012-05-04 18:27:35 -07003871 brcmf_sdio_regwl(bus->sdiodev, reg_addr, reg_val | CC_BPRESEN, NULL);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003872
3873 brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3874
3875 /* Locate an appropriately-aligned portion of hdrbuf */
3876 bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3877 BRCMF_SDALIGN);
3878
3879 /* Set the poll and/or interrupt flags */
3880 bus->intr = true;
3881 bus->poll = false;
3882 if (bus->poll)
3883 bus->pollrate = 1;
3884
3885 return true;
3886
3887fail:
3888 return false;
3889}
3890
Franky Line92eedf2011-11-22 17:21:50 -08003891static bool brcmf_sdbrcm_probe_init(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003892{
3893 brcmf_dbg(TRACE, "Enter\n");
3894
3895 /* Disable F2 to clear any intermediate frame state on the dongle */
Franky Lin3bba8292012-05-04 18:27:33 -07003896 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx,
3897 SDIO_FUNC_ENABLE_1, NULL);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003898
Franky Lin712ac5b2011-12-16 18:37:09 -08003899 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003900 bus->rxflow = false;
3901
3902 /* Done with backplane-dependent accesses, can drop clock... */
Franky Lin3bba8292012-05-04 18:27:33 -07003903 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003904
3905 /* ...and initialize clock/power states */
3906 bus->clkstate = CLK_SDONLY;
3907 bus->idletime = BRCMF_IDLE_INTERVAL;
3908 bus->idleclock = BRCMF_IDLE_ACTIVE;
3909
3910 /* Query the F2 block size, set roundup accordingly */
3911 bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
3912 bus->roundup = min(max_roundup, bus->blocksize);
3913
3914 /* bus module does not support packet chaining */
3915 bus->use_rxchain = false;
3916 bus->sd_rxchain = false;
3917
3918 return true;
3919}
3920
3921static int
3922brcmf_sdbrcm_watchdog_thread(void *data)
3923{
Franky Line92eedf2011-11-22 17:21:50 -08003924 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003925
3926 allow_signal(SIGTERM);
3927 /* Run until signal received */
3928 while (1) {
3929 if (kthread_should_stop())
3930 break;
3931 if (!wait_for_completion_interruptible(&bus->watchdog_wait)) {
Franky Lincad2b262011-11-22 17:21:53 -08003932 brcmf_sdbrcm_bus_watchdog(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003933 /* Count the tick for reference */
Arend van Spriel80969832012-06-09 22:51:44 +02003934 bus->sdcnt.tickcnt++;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003935 } else
3936 break;
3937 }
3938 return 0;
3939}
3940
3941static void
3942brcmf_sdbrcm_watchdog(unsigned long data)
3943{
Franky Line92eedf2011-11-22 17:21:50 -08003944 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
Arend van Spriel5b435de2011-10-05 13:19:03 +02003945
3946 if (bus->watchdog_tsk) {
3947 complete(&bus->watchdog_wait);
3948 /* Reschedule the watchdog */
3949 if (bus->wd_timer_valid)
3950 mod_timer(&bus->timer,
3951 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
3952 }
3953}
3954
Franky Line92eedf2011-11-22 17:21:50 -08003955static void brcmf_sdbrcm_release_dongle(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003956{
3957 brcmf_dbg(TRACE, "Enter\n");
3958
3959 if (bus->ci) {
3960 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3961 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
Franky Lina8a6c042011-11-04 22:23:39 +01003962 brcmf_sdio_chip_detach(&bus->ci);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003963 if (bus->vars && bus->varsz)
3964 kfree(bus->vars);
3965 bus->vars = NULL;
3966 }
3967
3968 brcmf_dbg(TRACE, "Disconnected\n");
3969}
3970
3971/* Detach and free everything */
Franky Line92eedf2011-11-22 17:21:50 -08003972static void brcmf_sdbrcm_release(struct brcmf_sdio *bus)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003973{
3974 brcmf_dbg(TRACE, "Enter\n");
Arend van Spriel4fc0d012012-06-14 12:16:57 +02003975
Arend van Spriel5b435de2011-10-05 13:19:03 +02003976 if (bus) {
3977 /* De-register interrupt handler */
Franky Linba89bf12012-04-27 18:56:59 -07003978 brcmf_sdio_intr_unregister(bus->sdiodev);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003979
Franky Linf1e68c22012-09-13 21:12:00 +02003980 cancel_work_sync(&bus->datawork);
3981 destroy_workqueue(bus->brcmf_wq);
3982
Franky Lin5f947ad2011-12-16 18:36:56 -08003983 if (bus->sdiodev->bus_if->drvr) {
3984 brcmf_detach(bus->sdiodev->dev);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003985 brcmf_sdbrcm_release_dongle(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02003986 }
3987
3988 brcmf_sdbrcm_release_malloc(bus);
3989
3990 kfree(bus);
3991 }
3992
3993 brcmf_dbg(TRACE, "Disconnected\n");
3994}
3995
Franky Lin4175b882011-11-22 17:21:49 -08003996void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev)
Arend van Spriel5b435de2011-10-05 13:19:03 +02003997{
3998 int ret;
Franky Line92eedf2011-11-22 17:21:50 -08003999 struct brcmf_sdio *bus;
Franky Linbbfd6a62012-06-26 21:26:35 +02004000 struct brcmf_bus_dcmd *dlst;
4001 u32 dngl_txglom;
Franky Linc3d2bc32012-06-26 21:26:36 +02004002 u32 dngl_txglomalign;
Franky Linbbfd6a62012-06-26 21:26:35 +02004003 u8 idx;
Arend van Spriel5b435de2011-10-05 13:19:03 +02004004
Arend van Spriel5b435de2011-10-05 13:19:03 +02004005 brcmf_dbg(TRACE, "Enter\n");
4006
4007 /* We make an assumption about address window mappings:
4008 * regsva == SI_ENUM_BASE*/
4009
4010 /* Allocate private bus interface state */
Franky Line92eedf2011-11-22 17:21:50 -08004011 bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
Arend van Spriel5b435de2011-10-05 13:19:03 +02004012 if (!bus)
4013 goto fail;
4014
4015 bus->sdiodev = sdiodev;
4016 sdiodev->bus = bus;
Arend van Sprielb83db862011-10-19 12:51:09 +02004017 skb_queue_head_init(&bus->glom);
Arend van Spriel5b435de2011-10-05 13:19:03 +02004018 bus->txbound = BRCMF_TXBOUND;
4019 bus->rxbound = BRCMF_RXBOUND;
4020 bus->txminmax = BRCMF_TXMINMAX;
4021 bus->tx_seq = SDPCM_SEQUENCE_WRAP - 1;
4022 bus->usebufpool = false; /* Use bufpool if allocated,
4023 else use locally malloced rxbuf */
4024
4025 /* attempt to attach to the dongle */
4026 if (!(brcmf_sdbrcm_probe_attach(bus, regsva))) {
4027 brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_attach failed\n");
4028 goto fail;
4029 }
4030
4031 spin_lock_init(&bus->txqlock);
4032 init_waitqueue_head(&bus->ctrl_wait);
4033 init_waitqueue_head(&bus->dcmd_resp_wait);
4034
Franky Linf1e68c22012-09-13 21:12:00 +02004035 bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");
4036 if (bus->brcmf_wq == NULL) {
4037 brcmf_dbg(ERROR, "insufficient memory to create txworkqueue\n");
4038 goto fail;
4039 }
4040 INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
4041
Arend van Spriel5b435de2011-10-05 13:19:03 +02004042 /* Set up the watchdog timer */
4043 init_timer(&bus->timer);
4044 bus->timer.data = (unsigned long)bus;
4045 bus->timer.function = brcmf_sdbrcm_watchdog;
4046
4047 /* Initialize thread based operation and lock */
4048 sema_init(&bus->sdsem, 1);
4049
4050 /* Initialize watchdog thread */
4051 init_completion(&bus->watchdog_wait);
4052 bus->watchdog_tsk = kthread_run(brcmf_sdbrcm_watchdog_thread,
4053 bus, "brcmf_watchdog");
4054 if (IS_ERR(bus->watchdog_tsk)) {
Joe Perches02f77192012-01-15 00:38:44 -08004055 pr_warn("brcmf_watchdog thread failed to start\n");
Arend van Spriel5b435de2011-10-05 13:19:03 +02004056 bus->watchdog_tsk = NULL;
4057 }
4058 /* Initialize DPC thread */
Franky Linb948a852012-04-23 14:24:53 -07004059 INIT_LIST_HEAD(&bus->dpc_tsklst);
4060 spin_lock_init(&bus->dpc_tl_lock);
Arend van Spriel5b435de2011-10-05 13:19:03 +02004061
Franky Lina9ffda82011-12-16 18:37:12 -08004062 /* Assign bus interface call back */
4063 bus->sdiodev->bus_if->brcmf_bus_stop = brcmf_sdbrcm_bus_stop;
Franky Lin99a0b8f2011-12-16 18:37:14 -08004064 bus->sdiodev->bus_if->brcmf_bus_init = brcmf_sdbrcm_bus_init;
Franky Linb9692d12011-12-16 18:37:15 -08004065 bus->sdiodev->bus_if->brcmf_bus_txdata = brcmf_sdbrcm_bus_txdata;
Franky Linfcf094f2011-12-16 18:37:16 -08004066 bus->sdiodev->bus_if->brcmf_bus_txctl = brcmf_sdbrcm_bus_txctl;
4067 bus->sdiodev->bus_if->brcmf_bus_rxctl = brcmf_sdbrcm_bus_rxctl;
Arend van Spriel5b435de2011-10-05 13:19:03 +02004068 /* Attach to the brcmf/OS/network interface */
Franky Lin2447ffb2011-12-16 18:37:10 -08004069 ret = brcmf_attach(SDPCM_RESERVE, bus->sdiodev->dev);
Franky Lin712ac5b2011-12-16 18:37:09 -08004070 if (ret != 0) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02004071 brcmf_dbg(ERROR, "brcmf_attach failed\n");
4072 goto fail;
4073 }
4074
4075 /* Allocate buffers */
4076 if (!(brcmf_sdbrcm_probe_malloc(bus))) {
4077 brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_malloc failed\n");
4078 goto fail;
4079 }
4080
4081 if (!(brcmf_sdbrcm_probe_init(bus))) {
4082 brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_init failed\n");
4083 goto fail;
4084 }
4085
Arend van Spriel80969832012-06-09 22:51:44 +02004086 brcmf_sdio_debugfs_create(bus);
Arend van Spriel5b435de2011-10-05 13:19:03 +02004087 brcmf_dbg(INFO, "completed!!\n");
4088
Franky Linbbfd6a62012-06-26 21:26:35 +02004089 /* sdio bus core specific dcmd */
4090 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
4091 dlst = kzalloc(sizeof(struct brcmf_bus_dcmd), GFP_KERNEL);
Franky Linc3d2bc32012-06-26 21:26:36 +02004092 if (dlst) {
4093 if (bus->ci->c_inf[idx].rev < 12) {
4094 /* for sdio core rev < 12, disable txgloming */
4095 dngl_txglom = 0;
4096 dlst->name = "bus:txglom";
4097 dlst->param = (char *)&dngl_txglom;
4098 dlst->param_len = sizeof(u32);
4099 } else {
4100 /* otherwise, set txglomalign */
4101 dngl_txglomalign = bus->sdiodev->bus_if->align;
4102 dlst->name = "bus:txglomalign";
4103 dlst->param = (char *)&dngl_txglomalign;
4104 dlst->param_len = sizeof(u32);
4105 }
Franky Linbbfd6a62012-06-26 21:26:35 +02004106 list_add(&dlst->list, &bus->sdiodev->bus_if->dcmd_list);
4107 }
4108
Arend van Spriel5b435de2011-10-05 13:19:03 +02004109 /* if firmware path present try to download and bring up bus */
Franky Lined683c92011-12-16 18:36:55 -08004110 ret = brcmf_bus_start(bus->sdiodev->dev);
Arend van Spriel5b435de2011-10-05 13:19:03 +02004111 if (ret != 0) {
4112 if (ret == -ENOLINK) {
4113 brcmf_dbg(ERROR, "dongle is not responding\n");
4114 goto fail;
4115 }
4116 }
Franky Lin15d45b62011-10-21 16:16:32 +02004117
Arend van Spriel5b435de2011-10-05 13:19:03 +02004118 return bus;
4119
4120fail:
4121 brcmf_sdbrcm_release(bus);
4122 return NULL;
4123}
4124
4125void brcmf_sdbrcm_disconnect(void *ptr)
4126{
Franky Line92eedf2011-11-22 17:21:50 -08004127 struct brcmf_sdio *bus = (struct brcmf_sdio *)ptr;
Arend van Spriel5b435de2011-10-05 13:19:03 +02004128
4129 brcmf_dbg(TRACE, "Enter\n");
4130
4131 if (bus)
4132 brcmf_sdbrcm_release(bus);
4133
4134 brcmf_dbg(TRACE, "Disconnected\n");
4135}
4136
Arend van Spriel5b435de2011-10-05 13:19:03 +02004137void
Franky Line92eedf2011-11-22 17:21:50 -08004138brcmf_sdbrcm_wd_timer(struct brcmf_sdio *bus, uint wdtick)
Arend van Spriel5b435de2011-10-05 13:19:03 +02004139{
Arend van Spriel5b435de2011-10-05 13:19:03 +02004140 /* Totally stop the timer */
Joe Perches23677ce2012-02-09 11:17:23 +00004141 if (!wdtick && bus->wd_timer_valid) {
Arend van Spriel5b435de2011-10-05 13:19:03 +02004142 del_timer_sync(&bus->timer);
4143 bus->wd_timer_valid = false;
4144 bus->save_ms = wdtick;
4145 return;
4146 }
4147
Franky Linece960e2011-10-21 16:16:19 +02004148 /* don't start the wd until fw is loaded */
Franky Lin712ac5b2011-12-16 18:37:09 -08004149 if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN)
Franky Linece960e2011-10-21 16:16:19 +02004150 return;
4151
Arend van Spriel5b435de2011-10-05 13:19:03 +02004152 if (wdtick) {
4153 if (bus->save_ms != BRCMF_WD_POLL_MS) {
Joe Perches23677ce2012-02-09 11:17:23 +00004154 if (bus->wd_timer_valid)
Arend van Spriel5b435de2011-10-05 13:19:03 +02004155 /* Stop timer and restart at new value */
4156 del_timer_sync(&bus->timer);
4157
4158 /* Create timer again when watchdog period is
4159 dynamically changed or in the first instance
4160 */
4161 bus->timer.expires =
4162 jiffies + BRCMF_WD_POLL_MS * HZ / 1000;
4163 add_timer(&bus->timer);
4164
4165 } else {
4166 /* Re arm the timer, at last watchdog period */
4167 mod_timer(&bus->timer,
4168 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
4169 }
4170
4171 bus->wd_timer_valid = true;
4172 bus->save_ms = wdtick;
4173 }
4174}