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5b435de0 AS |
1 | /* |
2 | * Copyright (c) 2010 Broadcom Corporation | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | |
11 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | |
13 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | |
14 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include <linux/types.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/kthread.h> | |
20 | #include <linux/printk.h> | |
21 | #include <linux/pci_ids.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/sched.h> | |
25 | #include <linux/mmc/sdio.h> | |
26 | #include <linux/mmc/sdio_func.h> | |
27 | #include <linux/mmc/card.h> | |
28 | #include <linux/semaphore.h> | |
29 | #include <linux/firmware.h> | |
b7a57e76 | 30 | #include <linux/module.h> |
99ba15cd | 31 | #include <linux/bcma/bcma.h> |
5b435de0 AS |
32 | #include <asm/unaligned.h> |
33 | #include <defs.h> | |
34 | #include <brcmu_wifi.h> | |
35 | #include <brcmu_utils.h> | |
36 | #include <brcm_hw_ids.h> | |
37 | #include <soc.h> | |
38 | #include "sdio_host.h" | |
a83369b6 | 39 | #include "sdio_chip.h" |
5b435de0 AS |
40 | |
41 | #define DCMD_RESP_TIMEOUT 2000 /* In milli second */ | |
42 | ||
43 | #ifdef BCMDBG | |
44 | ||
45 | #define BRCMF_TRAP_INFO_SIZE 80 | |
46 | ||
47 | #define CBUF_LEN (128) | |
48 | ||
49 | struct rte_log_le { | |
50 | __le32 buf; /* Can't be pointer on (64-bit) hosts */ | |
51 | __le32 buf_size; | |
52 | __le32 idx; | |
53 | char *_buf_compat; /* Redundant pointer for backward compat. */ | |
54 | }; | |
55 | ||
56 | struct rte_console { | |
57 | /* Virtual UART | |
58 | * When there is no UART (e.g. Quickturn), | |
59 | * the host should write a complete | |
60 | * input line directly into cbuf and then write | |
61 | * the length into vcons_in. | |
62 | * This may also be used when there is a real UART | |
63 | * (at risk of conflicting with | |
64 | * the real UART). vcons_out is currently unused. | |
65 | */ | |
66 | uint vcons_in; | |
67 | uint vcons_out; | |
68 | ||
69 | /* Output (logging) buffer | |
70 | * Console output is written to a ring buffer log_buf at index log_idx. | |
71 | * The host may read the output when it sees log_idx advance. | |
72 | * Output will be lost if the output wraps around faster than the host | |
73 | * polls. | |
74 | */ | |
75 | struct rte_log_le log_le; | |
76 | ||
77 | /* Console input line buffer | |
78 | * Characters are read one at a time into cbuf | |
79 | * until <CR> is received, then | |
80 | * the buffer is processed as a command line. | |
81 | * Also used for virtual UART. | |
82 | */ | |
83 | uint cbuf_idx; | |
84 | char cbuf[CBUF_LEN]; | |
85 | }; | |
86 | ||
87 | #endif /* BCMDBG */ | |
88 | #include <chipcommon.h> | |
89 | ||
90 | #include "dhd.h" | |
91 | #include "dhd_bus.h" | |
92 | #include "dhd_proto.h" | |
93 | #include "dhd_dbg.h" | |
94 | #include <bcmchip.h> | |
95 | ||
96 | #define TXQLEN 2048 /* bulk tx queue length */ | |
97 | #define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */ | |
98 | #define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */ | |
99 | #define PRIOMASK 7 | |
100 | ||
101 | #define TXRETRIES 2 /* # of retries for tx frames */ | |
102 | ||
103 | #define BRCMF_RXBOUND 50 /* Default for max rx frames in | |
104 | one scheduling */ | |
105 | ||
106 | #define BRCMF_TXBOUND 20 /* Default for max tx frames in | |
107 | one scheduling */ | |
108 | ||
109 | #define BRCMF_TXMINMAX 1 /* Max tx frames if rx still pending */ | |
110 | ||
111 | #define MEMBLOCK 2048 /* Block size used for downloading | |
112 | of dongle image */ | |
113 | #define MAX_DATA_BUF (32 * 1024) /* Must be large enough to hold | |
114 | biggest possible glom */ | |
115 | ||
116 | #define BRCMF_FIRSTREAD (1 << 6) | |
117 | ||
118 | ||
119 | /* SBSDIO_DEVICE_CTL */ | |
120 | ||
121 | /* 1: device will assert busy signal when receiving CMD53 */ | |
122 | #define SBSDIO_DEVCTL_SETBUSY 0x01 | |
123 | /* 1: assertion of sdio interrupt is synchronous to the sdio clock */ | |
124 | #define SBSDIO_DEVCTL_SPI_INTR_SYNC 0x02 | |
125 | /* 1: mask all interrupts to host except the chipActive (rev 8) */ | |
126 | #define SBSDIO_DEVCTL_CA_INT_ONLY 0x04 | |
127 | /* 1: isolate internal sdio signals, put external pads in tri-state; requires | |
128 | * sdio bus power cycle to clear (rev 9) */ | |
129 | #define SBSDIO_DEVCTL_PADS_ISO 0x08 | |
130 | /* Force SD->SB reset mapping (rev 11) */ | |
131 | #define SBSDIO_DEVCTL_SB_RST_CTL 0x30 | |
132 | /* Determined by CoreControl bit */ | |
133 | #define SBSDIO_DEVCTL_RST_CORECTL 0x00 | |
134 | /* Force backplane reset */ | |
135 | #define SBSDIO_DEVCTL_RST_BPRESET 0x10 | |
136 | /* Force no backplane reset */ | |
137 | #define SBSDIO_DEVCTL_RST_NOBPRESET 0x20 | |
138 | ||
5b435de0 AS |
139 | /* direct(mapped) cis space */ |
140 | ||
141 | /* MAPPED common CIS address */ | |
142 | #define SBSDIO_CIS_BASE_COMMON 0x1000 | |
143 | /* maximum bytes in one CIS */ | |
144 | #define SBSDIO_CIS_SIZE_LIMIT 0x200 | |
145 | /* cis offset addr is < 17 bits */ | |
146 | #define SBSDIO_CIS_OFT_ADDR_MASK 0x1FFFF | |
147 | ||
148 | /* manfid tuple length, include tuple, link bytes */ | |
149 | #define SBSDIO_CIS_MANFID_TUPLE_LEN 6 | |
150 | ||
151 | /* intstatus */ | |
152 | #define I_SMB_SW0 (1 << 0) /* To SB Mail S/W interrupt 0 */ | |
153 | #define I_SMB_SW1 (1 << 1) /* To SB Mail S/W interrupt 1 */ | |
154 | #define I_SMB_SW2 (1 << 2) /* To SB Mail S/W interrupt 2 */ | |
155 | #define I_SMB_SW3 (1 << 3) /* To SB Mail S/W interrupt 3 */ | |
156 | #define I_SMB_SW_MASK 0x0000000f /* To SB Mail S/W interrupts mask */ | |
157 | #define I_SMB_SW_SHIFT 0 /* To SB Mail S/W interrupts shift */ | |
158 | #define I_HMB_SW0 (1 << 4) /* To Host Mail S/W interrupt 0 */ | |
159 | #define I_HMB_SW1 (1 << 5) /* To Host Mail S/W interrupt 1 */ | |
160 | #define I_HMB_SW2 (1 << 6) /* To Host Mail S/W interrupt 2 */ | |
161 | #define I_HMB_SW3 (1 << 7) /* To Host Mail S/W interrupt 3 */ | |
162 | #define I_HMB_SW_MASK 0x000000f0 /* To Host Mail S/W interrupts mask */ | |
163 | #define I_HMB_SW_SHIFT 4 /* To Host Mail S/W interrupts shift */ | |
164 | #define I_WR_OOSYNC (1 << 8) /* Write Frame Out Of Sync */ | |
165 | #define I_RD_OOSYNC (1 << 9) /* Read Frame Out Of Sync */ | |
166 | #define I_PC (1 << 10) /* descriptor error */ | |
167 | #define I_PD (1 << 11) /* data error */ | |
168 | #define I_DE (1 << 12) /* Descriptor protocol Error */ | |
169 | #define I_RU (1 << 13) /* Receive descriptor Underflow */ | |
170 | #define I_RO (1 << 14) /* Receive fifo Overflow */ | |
171 | #define I_XU (1 << 15) /* Transmit fifo Underflow */ | |
172 | #define I_RI (1 << 16) /* Receive Interrupt */ | |
173 | #define I_BUSPWR (1 << 17) /* SDIO Bus Power Change (rev 9) */ | |
174 | #define I_XMTDATA_AVAIL (1 << 23) /* bits in fifo */ | |
175 | #define I_XI (1 << 24) /* Transmit Interrupt */ | |
176 | #define I_RF_TERM (1 << 25) /* Read Frame Terminate */ | |
177 | #define I_WF_TERM (1 << 26) /* Write Frame Terminate */ | |
178 | #define I_PCMCIA_XU (1 << 27) /* PCMCIA Transmit FIFO Underflow */ | |
179 | #define I_SBINT (1 << 28) /* sbintstatus Interrupt */ | |
180 | #define I_CHIPACTIVE (1 << 29) /* chip from doze to active state */ | |
181 | #define I_SRESET (1 << 30) /* CCCR RES interrupt */ | |
182 | #define I_IOE2 (1U << 31) /* CCCR IOE2 Bit Changed */ | |
183 | #define I_ERRORS (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU) | |
184 | #define I_DMA (I_RI | I_XI | I_ERRORS) | |
185 | ||
186 | /* corecontrol */ | |
187 | #define CC_CISRDY (1 << 0) /* CIS Ready */ | |
188 | #define CC_BPRESEN (1 << 1) /* CCCR RES signal */ | |
189 | #define CC_F2RDY (1 << 2) /* set CCCR IOR2 bit */ | |
190 | #define CC_CLRPADSISO (1 << 3) /* clear SDIO pads isolation */ | |
191 | #define CC_XMTDATAAVAIL_MODE (1 << 4) | |
192 | #define CC_XMTDATAAVAIL_CTRL (1 << 5) | |
193 | ||
194 | /* SDA_FRAMECTRL */ | |
195 | #define SFC_RF_TERM (1 << 0) /* Read Frame Terminate */ | |
196 | #define SFC_WF_TERM (1 << 1) /* Write Frame Terminate */ | |
197 | #define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */ | |
198 | #define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */ | |
199 | ||
200 | /* HW frame tag */ | |
201 | #define SDPCM_FRAMETAG_LEN 4 /* 2 bytes len, 2 bytes check val */ | |
202 | ||
203 | /* Total length of frame header for dongle protocol */ | |
204 | #define SDPCM_HDRLEN (SDPCM_FRAMETAG_LEN + SDPCM_SWHEADER_LEN) | |
205 | #define SDPCM_RESERVE (SDPCM_HDRLEN + BRCMF_SDALIGN) | |
206 | ||
207 | /* | |
208 | * Software allocation of To SB Mailbox resources | |
209 | */ | |
210 | ||
211 | /* tosbmailbox bits corresponding to intstatus bits */ | |
212 | #define SMB_NAK (1 << 0) /* Frame NAK */ | |
213 | #define SMB_INT_ACK (1 << 1) /* Host Interrupt ACK */ | |
214 | #define SMB_USE_OOB (1 << 2) /* Use OOB Wakeup */ | |
215 | #define SMB_DEV_INT (1 << 3) /* Miscellaneous Interrupt */ | |
216 | ||
217 | /* tosbmailboxdata */ | |
218 | #define SMB_DATA_VERSION_SHIFT 16 /* host protocol version */ | |
219 | ||
220 | /* | |
221 | * Software allocation of To Host Mailbox resources | |
222 | */ | |
223 | ||
224 | /* intstatus bits */ | |
225 | #define I_HMB_FC_STATE I_HMB_SW0 /* Flow Control State */ | |
226 | #define I_HMB_FC_CHANGE I_HMB_SW1 /* Flow Control State Changed */ | |
227 | #define I_HMB_FRAME_IND I_HMB_SW2 /* Frame Indication */ | |
228 | #define I_HMB_HOST_INT I_HMB_SW3 /* Miscellaneous Interrupt */ | |
229 | ||
230 | /* tohostmailboxdata */ | |
231 | #define HMB_DATA_NAKHANDLED 1 /* retransmit NAK'd frame */ | |
232 | #define HMB_DATA_DEVREADY 2 /* talk to host after enable */ | |
233 | #define HMB_DATA_FC 4 /* per prio flowcontrol update flag */ | |
234 | #define HMB_DATA_FWREADY 8 /* fw ready for protocol activity */ | |
235 | ||
236 | #define HMB_DATA_FCDATA_MASK 0xff000000 | |
237 | #define HMB_DATA_FCDATA_SHIFT 24 | |
238 | ||
239 | #define HMB_DATA_VERSION_MASK 0x00ff0000 | |
240 | #define HMB_DATA_VERSION_SHIFT 16 | |
241 | ||
242 | /* | |
243 | * Software-defined protocol header | |
244 | */ | |
245 | ||
246 | /* Current protocol version */ | |
247 | #define SDPCM_PROT_VERSION 4 | |
248 | ||
249 | /* SW frame header */ | |
250 | #define SDPCM_PACKET_SEQUENCE(p) (((u8 *)p)[0] & 0xff) | |
251 | ||
252 | #define SDPCM_CHANNEL_MASK 0x00000f00 | |
253 | #define SDPCM_CHANNEL_SHIFT 8 | |
254 | #define SDPCM_PACKET_CHANNEL(p) (((u8 *)p)[1] & 0x0f) | |
255 | ||
256 | #define SDPCM_NEXTLEN_OFFSET 2 | |
257 | ||
258 | /* Data Offset from SOF (HW Tag, SW Tag, Pad) */ | |
259 | #define SDPCM_DOFFSET_OFFSET 3 /* Data Offset */ | |
260 | #define SDPCM_DOFFSET_VALUE(p) (((u8 *)p)[SDPCM_DOFFSET_OFFSET] & 0xff) | |
261 | #define SDPCM_DOFFSET_MASK 0xff000000 | |
262 | #define SDPCM_DOFFSET_SHIFT 24 | |
263 | #define SDPCM_FCMASK_OFFSET 4 /* Flow control */ | |
264 | #define SDPCM_FCMASK_VALUE(p) (((u8 *)p)[SDPCM_FCMASK_OFFSET] & 0xff) | |
265 | #define SDPCM_WINDOW_OFFSET 5 /* Credit based fc */ | |
266 | #define SDPCM_WINDOW_VALUE(p) (((u8 *)p)[SDPCM_WINDOW_OFFSET] & 0xff) | |
267 | ||
268 | #define SDPCM_SWHEADER_LEN 8 /* SW header is 64 bits */ | |
269 | ||
270 | /* logical channel numbers */ | |
271 | #define SDPCM_CONTROL_CHANNEL 0 /* Control channel Id */ | |
272 | #define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication Channel Id */ | |
273 | #define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv Channel Id */ | |
274 | #define SDPCM_GLOM_CHANNEL 3 /* For coalesced packets */ | |
275 | #define SDPCM_TEST_CHANNEL 15 /* Reserved for test/debug packets */ | |
276 | ||
277 | #define SDPCM_SEQUENCE_WRAP 256 /* wrap-around val for 8bit frame seq */ | |
278 | ||
279 | #define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80) | |
280 | ||
281 | /* | |
282 | * Shared structure between dongle and the host. | |
283 | * The structure contains pointers to trap or assert information. | |
284 | */ | |
285 | #define SDPCM_SHARED_VERSION 0x0002 | |
286 | #define SDPCM_SHARED_VERSION_MASK 0x00FF | |
287 | #define SDPCM_SHARED_ASSERT_BUILT 0x0100 | |
288 | #define SDPCM_SHARED_ASSERT 0x0200 | |
289 | #define SDPCM_SHARED_TRAP 0x0400 | |
290 | ||
291 | /* Space for header read, limit for data packets */ | |
292 | #define MAX_HDR_READ (1 << 6) | |
293 | #define MAX_RX_DATASZ 2048 | |
294 | ||
295 | /* Maximum milliseconds to wait for F2 to come up */ | |
296 | #define BRCMF_WAIT_F2RDY 3000 | |
297 | ||
298 | /* Bump up limit on waiting for HT to account for first startup; | |
299 | * if the image is doing a CRC calculation before programming the PMU | |
300 | * for HT availability, it could take a couple hundred ms more, so | |
301 | * max out at a 1 second (1000000us). | |
302 | */ | |
303 | #undef PMU_MAX_TRANSITION_DLY | |
304 | #define PMU_MAX_TRANSITION_DLY 1000000 | |
305 | ||
306 | /* Value for ChipClockCSR during initial setup */ | |
307 | #define BRCMF_INIT_CLKCTL1 (SBSDIO_FORCE_HW_CLKREQ_OFF | \ | |
308 | SBSDIO_ALP_AVAIL_REQ) | |
309 | ||
310 | /* Flags for SDH calls */ | |
311 | #define F2SYNC (SDIO_REQ_4BYTE | SDIO_REQ_FIXED) | |
312 | ||
5b435de0 AS |
313 | /* |
314 | * Conversion of 802.1D priority to precedence level | |
315 | */ | |
316 | static uint prio2prec(u32 prio) | |
317 | { | |
318 | return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ? | |
319 | (prio^2) : prio; | |
320 | } | |
321 | ||
5b435de0 AS |
322 | /* core registers */ |
323 | struct sdpcmd_regs { | |
324 | u32 corecontrol; /* 0x00, rev8 */ | |
325 | u32 corestatus; /* rev8 */ | |
326 | u32 PAD[1]; | |
327 | u32 biststatus; /* rev8 */ | |
328 | ||
329 | /* PCMCIA access */ | |
330 | u16 pcmciamesportaladdr; /* 0x010, rev8 */ | |
331 | u16 PAD[1]; | |
332 | u16 pcmciamesportalmask; /* rev8 */ | |
333 | u16 PAD[1]; | |
334 | u16 pcmciawrframebc; /* rev8 */ | |
335 | u16 PAD[1]; | |
336 | u16 pcmciaunderflowtimer; /* rev8 */ | |
337 | u16 PAD[1]; | |
338 | ||
339 | /* interrupt */ | |
340 | u32 intstatus; /* 0x020, rev8 */ | |
341 | u32 hostintmask; /* rev8 */ | |
342 | u32 intmask; /* rev8 */ | |
343 | u32 sbintstatus; /* rev8 */ | |
344 | u32 sbintmask; /* rev8 */ | |
345 | u32 funcintmask; /* rev4 */ | |
346 | u32 PAD[2]; | |
347 | u32 tosbmailbox; /* 0x040, rev8 */ | |
348 | u32 tohostmailbox; /* rev8 */ | |
349 | u32 tosbmailboxdata; /* rev8 */ | |
350 | u32 tohostmailboxdata; /* rev8 */ | |
351 | ||
352 | /* synchronized access to registers in SDIO clock domain */ | |
353 | u32 sdioaccess; /* 0x050, rev8 */ | |
354 | u32 PAD[3]; | |
355 | ||
356 | /* PCMCIA frame control */ | |
357 | u8 pcmciaframectrl; /* 0x060, rev8 */ | |
358 | u8 PAD[3]; | |
359 | u8 pcmciawatermark; /* rev8 */ | |
360 | u8 PAD[155]; | |
361 | ||
362 | /* interrupt batching control */ | |
363 | u32 intrcvlazy; /* 0x100, rev8 */ | |
364 | u32 PAD[3]; | |
365 | ||
366 | /* counters */ | |
367 | u32 cmd52rd; /* 0x110, rev8 */ | |
368 | u32 cmd52wr; /* rev8 */ | |
369 | u32 cmd53rd; /* rev8 */ | |
370 | u32 cmd53wr; /* rev8 */ | |
371 | u32 abort; /* rev8 */ | |
372 | u32 datacrcerror; /* rev8 */ | |
373 | u32 rdoutofsync; /* rev8 */ | |
374 | u32 wroutofsync; /* rev8 */ | |
375 | u32 writebusy; /* rev8 */ | |
376 | u32 readwait; /* rev8 */ | |
377 | u32 readterm; /* rev8 */ | |
378 | u32 writeterm; /* rev8 */ | |
379 | u32 PAD[40]; | |
380 | u32 clockctlstatus; /* rev8 */ | |
381 | u32 PAD[7]; | |
382 | ||
383 | u32 PAD[128]; /* DMA engines */ | |
384 | ||
385 | /* SDIO/PCMCIA CIS region */ | |
386 | char cis[512]; /* 0x400-0x5ff, rev6 */ | |
387 | ||
388 | /* PCMCIA function control registers */ | |
389 | char pcmciafcr[256]; /* 0x600-6ff, rev6 */ | |
390 | u16 PAD[55]; | |
391 | ||
392 | /* PCMCIA backplane access */ | |
393 | u16 backplanecsr; /* 0x76E, rev6 */ | |
394 | u16 backplaneaddr0; /* rev6 */ | |
395 | u16 backplaneaddr1; /* rev6 */ | |
396 | u16 backplaneaddr2; /* rev6 */ | |
397 | u16 backplaneaddr3; /* rev6 */ | |
398 | u16 backplanedata0; /* rev6 */ | |
399 | u16 backplanedata1; /* rev6 */ | |
400 | u16 backplanedata2; /* rev6 */ | |
401 | u16 backplanedata3; /* rev6 */ | |
402 | u16 PAD[31]; | |
403 | ||
404 | /* sprom "size" & "blank" info */ | |
405 | u16 spromstatus; /* 0x7BE, rev2 */ | |
406 | u32 PAD[464]; | |
407 | ||
408 | u16 PAD[0x80]; | |
409 | }; | |
410 | ||
411 | #ifdef BCMDBG | |
412 | /* Device console log buffer state */ | |
413 | struct brcmf_console { | |
414 | uint count; /* Poll interval msec counter */ | |
415 | uint log_addr; /* Log struct address (fixed) */ | |
416 | struct rte_log_le log_le; /* Log struct (host copy) */ | |
417 | uint bufsize; /* Size of log buffer */ | |
418 | u8 *buf; /* Log buffer (host copy) */ | |
419 | uint last; /* Last buffer read index */ | |
420 | }; | |
421 | #endif /* BCMDBG */ | |
422 | ||
423 | struct sdpcm_shared { | |
424 | u32 flags; | |
425 | u32 trap_addr; | |
426 | u32 assert_exp_addr; | |
427 | u32 assert_file_addr; | |
428 | u32 assert_line; | |
429 | u32 console_addr; /* Address of struct rte_console */ | |
430 | u32 msgtrace_addr; | |
431 | u8 tag[32]; | |
432 | }; | |
433 | ||
434 | struct sdpcm_shared_le { | |
435 | __le32 flags; | |
436 | __le32 trap_addr; | |
437 | __le32 assert_exp_addr; | |
438 | __le32 assert_file_addr; | |
439 | __le32 assert_line; | |
440 | __le32 console_addr; /* Address of struct rte_console */ | |
441 | __le32 msgtrace_addr; | |
442 | u8 tag[32]; | |
443 | }; | |
444 | ||
445 | ||
446 | /* misc chip info needed by some of the routines */ | |
5b435de0 AS |
447 | /* Private data for SDIO bus interaction */ |
448 | struct brcmf_bus { | |
449 | struct brcmf_pub *drvr; | |
450 | ||
451 | struct brcmf_sdio_dev *sdiodev; /* sdio device handler */ | |
452 | struct chip_info *ci; /* Chip info struct */ | |
453 | char *vars; /* Variables (from CIS and/or other) */ | |
454 | uint varsz; /* Size of variables buffer */ | |
455 | ||
456 | u32 ramsize; /* Size of RAM in SOCRAM (bytes) */ | |
457 | ||
458 | u32 hostintmask; /* Copy of Host Interrupt Mask */ | |
459 | u32 intstatus; /* Intstatus bits (events) pending */ | |
460 | bool dpc_sched; /* Indicates DPC schedule (intrpt rcvd) */ | |
461 | bool fcstate; /* State of dongle flow-control */ | |
462 | ||
463 | uint blocksize; /* Block size of SDIO transfers */ | |
464 | uint roundup; /* Max roundup limit */ | |
465 | ||
466 | struct pktq txq; /* Queue length used for flow-control */ | |
467 | u8 flowcontrol; /* per prio flow control bitmask */ | |
468 | u8 tx_seq; /* Transmit sequence number (next) */ | |
469 | u8 tx_max; /* Maximum transmit sequence allowed */ | |
470 | ||
471 | u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN]; | |
472 | u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */ | |
473 | u16 nextlen; /* Next Read Len from last header */ | |
474 | u8 rx_seq; /* Receive sequence number (expected) */ | |
475 | bool rxskip; /* Skip receive (awaiting NAK ACK) */ | |
476 | ||
477 | uint rxbound; /* Rx frames to read before resched */ | |
478 | uint txbound; /* Tx frames to send before resched */ | |
479 | uint txminmax; | |
480 | ||
481 | struct sk_buff *glomd; /* Packet containing glomming descriptor */ | |
b83db862 | 482 | struct sk_buff_head glom; /* Packet list for glommed superframe */ |
5b435de0 AS |
483 | uint glomerr; /* Glom packet read errors */ |
484 | ||
485 | u8 *rxbuf; /* Buffer for receiving control packets */ | |
486 | uint rxblen; /* Allocated length of rxbuf */ | |
487 | u8 *rxctl; /* Aligned pointer into rxbuf */ | |
488 | u8 *databuf; /* Buffer for receiving big glom packet */ | |
489 | u8 *dataptr; /* Aligned pointer into databuf */ | |
490 | uint rxlen; /* Length of valid data in buffer */ | |
491 | ||
492 | u8 sdpcm_ver; /* Bus protocol reported by dongle */ | |
493 | ||
494 | bool intr; /* Use interrupts */ | |
495 | bool poll; /* Use polling */ | |
496 | bool ipend; /* Device interrupt is pending */ | |
497 | uint intrcount; /* Count of device interrupt callbacks */ | |
498 | uint lastintrs; /* Count as of last watchdog timer */ | |
499 | uint spurious; /* Count of spurious interrupts */ | |
500 | uint pollrate; /* Ticks between device polls */ | |
501 | uint polltick; /* Tick counter */ | |
502 | uint pollcnt; /* Count of active polls */ | |
503 | ||
504 | #ifdef BCMDBG | |
505 | uint console_interval; | |
506 | struct brcmf_console console; /* Console output polling support */ | |
507 | uint console_addr; /* Console address from shared struct */ | |
508 | #endif /* BCMDBG */ | |
509 | ||
510 | uint regfails; /* Count of R_REG failures */ | |
511 | ||
512 | uint clkstate; /* State of sd and backplane clock(s) */ | |
513 | bool activity; /* Activity flag for clock down */ | |
514 | s32 idletime; /* Control for activity timeout */ | |
515 | s32 idlecount; /* Activity timeout counter */ | |
516 | s32 idleclock; /* How to set bus driver when idle */ | |
517 | s32 sd_rxchain; | |
518 | bool use_rxchain; /* If brcmf should use PKT chains */ | |
519 | bool sleeping; /* Is SDIO bus sleeping? */ | |
520 | bool rxflow_mode; /* Rx flow control mode */ | |
521 | bool rxflow; /* Is rx flow control on */ | |
522 | bool alp_only; /* Don't use HT clock (ALP only) */ | |
523 | /* Field to decide if rx of control frames happen in rxbuf or lb-pool */ | |
524 | bool usebufpool; | |
525 | ||
526 | /* Some additional counters */ | |
527 | uint tx_sderrs; /* Count of tx attempts with sd errors */ | |
528 | uint fcqueued; /* Tx packets that got queued */ | |
529 | uint rxrtx; /* Count of rtx requests (NAK to dongle) */ | |
530 | uint rx_toolong; /* Receive frames too long to receive */ | |
531 | uint rxc_errors; /* SDIO errors when reading control frames */ | |
532 | uint rx_hdrfail; /* SDIO errors on header reads */ | |
533 | uint rx_badhdr; /* Bad received headers (roosync?) */ | |
534 | uint rx_badseq; /* Mismatched rx sequence number */ | |
535 | uint fc_rcvd; /* Number of flow-control events received */ | |
536 | uint fc_xoff; /* Number which turned on flow-control */ | |
537 | uint fc_xon; /* Number which turned off flow-control */ | |
538 | uint rxglomfail; /* Failed deglom attempts */ | |
539 | uint rxglomframes; /* Number of glom frames (superframes) */ | |
540 | uint rxglompkts; /* Number of packets from glom frames */ | |
541 | uint f2rxhdrs; /* Number of header reads */ | |
542 | uint f2rxdata; /* Number of frame data reads */ | |
543 | uint f2txdata; /* Number of f2 frame writes */ | |
544 | uint f1regdata; /* Number of f1 register accesses */ | |
545 | ||
546 | u8 *ctrl_frame_buf; | |
547 | u32 ctrl_frame_len; | |
548 | bool ctrl_frame_stat; | |
549 | ||
550 | spinlock_t txqlock; | |
551 | wait_queue_head_t ctrl_wait; | |
552 | wait_queue_head_t dcmd_resp_wait; | |
553 | ||
554 | struct timer_list timer; | |
555 | struct completion watchdog_wait; | |
556 | struct task_struct *watchdog_tsk; | |
557 | bool wd_timer_valid; | |
558 | uint save_ms; | |
559 | ||
560 | struct task_struct *dpc_tsk; | |
561 | struct completion dpc_wait; | |
562 | ||
563 | struct semaphore sdsem; | |
564 | ||
565 | const char *fw_name; | |
566 | const struct firmware *firmware; | |
567 | const char *nv_name; | |
568 | u32 fw_ptr; | |
569 | }; | |
570 | ||
5b435de0 AS |
571 | /* clkstate */ |
572 | #define CLK_NONE 0 | |
573 | #define CLK_SDONLY 1 | |
574 | #define CLK_PENDING 2 /* Not used yet */ | |
575 | #define CLK_AVAIL 3 | |
576 | ||
577 | #ifdef BCMDBG | |
578 | static int qcount[NUMPRIO]; | |
579 | static int tx_packets[NUMPRIO]; | |
580 | #endif /* BCMDBG */ | |
581 | ||
582 | #define SDIO_DRIVE_STRENGTH 6 /* in milliamps */ | |
583 | ||
584 | #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL) | |
585 | ||
586 | /* Retry count for register access failures */ | |
587 | static const uint retry_limit = 2; | |
588 | ||
589 | /* Limit on rounding up frames */ | |
590 | static const uint max_roundup = 512; | |
591 | ||
592 | #define ALIGNMENT 4 | |
593 | ||
594 | static void pkt_align(struct sk_buff *p, int len, int align) | |
595 | { | |
596 | uint datalign; | |
597 | datalign = (unsigned long)(p->data); | |
598 | datalign = roundup(datalign, (align)) - datalign; | |
599 | if (datalign) | |
600 | skb_pull(p, datalign); | |
601 | __skb_trim(p, len); | |
602 | } | |
603 | ||
604 | /* To check if there's window offered */ | |
605 | static bool data_ok(struct brcmf_bus *bus) | |
606 | { | |
607 | return (u8)(bus->tx_max - bus->tx_seq) != 0 && | |
608 | ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Reads a register in the SDIO hardware block. This block occupies a series of | |
613 | * adresses on the 32 bit backplane bus. | |
614 | */ | |
615 | static void | |
616 | r_sdreg32(struct brcmf_bus *bus, u32 *regvar, u32 reg_offset, u32 *retryvar) | |
617 | { | |
99ba15cd | 618 | u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV); |
5b435de0 AS |
619 | *retryvar = 0; |
620 | do { | |
621 | *regvar = brcmf_sdcard_reg_read(bus->sdiodev, | |
99ba15cd FL |
622 | bus->ci->c_inf[idx].base + reg_offset, |
623 | sizeof(u32)); | |
5b435de0 AS |
624 | } while (brcmf_sdcard_regfail(bus->sdiodev) && |
625 | (++(*retryvar) <= retry_limit)); | |
626 | if (*retryvar) { | |
627 | bus->regfails += (*retryvar-1); | |
628 | if (*retryvar > retry_limit) { | |
629 | brcmf_dbg(ERROR, "FAILED READ %Xh\n", reg_offset); | |
630 | *regvar = 0; | |
631 | } | |
632 | } | |
633 | } | |
634 | ||
635 | static void | |
636 | w_sdreg32(struct brcmf_bus *bus, u32 regval, u32 reg_offset, u32 *retryvar) | |
637 | { | |
99ba15cd | 638 | u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV); |
5b435de0 AS |
639 | *retryvar = 0; |
640 | do { | |
641 | brcmf_sdcard_reg_write(bus->sdiodev, | |
99ba15cd | 642 | bus->ci->c_inf[idx].base + reg_offset, |
5b435de0 AS |
643 | sizeof(u32), regval); |
644 | } while (brcmf_sdcard_regfail(bus->sdiodev) && | |
645 | (++(*retryvar) <= retry_limit)); | |
646 | if (*retryvar) { | |
647 | bus->regfails += (*retryvar-1); | |
648 | if (*retryvar > retry_limit) | |
649 | brcmf_dbg(ERROR, "FAILED REGISTER WRITE %Xh\n", | |
650 | reg_offset); | |
651 | } | |
652 | } | |
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 | */ | |
661 | static void brcmf_sdbrcm_pktfree2(struct brcmf_bus *bus, struct sk_buff *pkt) | |
662 | { | |
663 | if (bus->usebufpool) | |
664 | brcmu_pkt_buf_free_skb(pkt); | |
665 | } | |
666 | ||
667 | /* Turn backplane clock on or off */ | |
668 | static int brcmf_sdbrcm_htclk(struct brcmf_bus *bus, bool on, bool pendok) | |
669 | { | |
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 | ||
5b435de0 AS |
683 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, |
684 | SBSDIO_FUNC1_CHIPCLKCSR, clkreq, &err); | |
685 | if (err) { | |
686 | brcmf_dbg(ERROR, "HT Avail request error: %d\n", err); | |
687 | return -EBADE; | |
688 | } | |
689 | ||
99ba15cd FL |
690 | if (pendok && ((bus->ci->c_inf[1].id == PCMCIA_CORE_ID) |
691 | && (bus->ci->c_inf[1].rev == 9))) { | |
5b435de0 AS |
692 | u32 dummy, retries; |
693 | r_sdreg32(bus, &dummy, | |
694 | offsetof(struct sdpcmd_regs, clockctlstatus), | |
695 | &retries); | |
696 | } | |
697 | ||
698 | /* Check current status */ | |
699 | clkctl = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
700 | SBSDIO_FUNC1_CHIPCLKCSR, &err); | |
701 | if (err) { | |
702 | brcmf_dbg(ERROR, "HT Avail read error: %d\n", err); | |
703 | return -EBADE; | |
704 | } | |
705 | ||
706 | /* Go to pending and await interrupt if appropriate */ | |
707 | if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) { | |
708 | /* Allow only clock-available interrupt */ | |
709 | devctl = brcmf_sdcard_cfg_read(bus->sdiodev, | |
710 | SDIO_FUNC_1, | |
711 | SBSDIO_DEVICE_CTL, &err); | |
712 | if (err) { | |
713 | brcmf_dbg(ERROR, "Devctl error setting CA: %d\n", | |
714 | err); | |
715 | return -EBADE; | |
716 | } | |
717 | ||
718 | devctl |= SBSDIO_DEVCTL_CA_INT_ONLY; | |
719 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
720 | SBSDIO_DEVICE_CTL, devctl, &err); | |
721 | brcmf_dbg(INFO, "CLKCTL: set PENDING\n"); | |
722 | bus->clkstate = CLK_PENDING; | |
723 | ||
724 | return 0; | |
725 | } else if (bus->clkstate == CLK_PENDING) { | |
726 | /* Cancel CA-only interrupt filter */ | |
727 | devctl = | |
728 | brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
729 | SBSDIO_DEVICE_CTL, &err); | |
730 | devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY; | |
731 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
732 | SBSDIO_DEVICE_CTL, devctl, &err); | |
733 | } | |
734 | ||
735 | /* Otherwise, wait here (polling) for HT Avail */ | |
736 | timeout = jiffies + | |
737 | msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000); | |
738 | while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) { | |
739 | clkctl = brcmf_sdcard_cfg_read(bus->sdiodev, | |
740 | SDIO_FUNC_1, | |
741 | SBSDIO_FUNC1_CHIPCLKCSR, | |
742 | &err); | |
743 | if (time_after(jiffies, timeout)) | |
744 | break; | |
745 | else | |
746 | usleep_range(5000, 10000); | |
747 | } | |
748 | if (err) { | |
749 | brcmf_dbg(ERROR, "HT Avail request error: %d\n", err); | |
750 | return -EBADE; | |
751 | } | |
752 | if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) { | |
753 | brcmf_dbg(ERROR, "HT Avail timeout (%d): clkctl 0x%02x\n", | |
754 | PMU_MAX_TRANSITION_DLY, clkctl); | |
755 | return -EBADE; | |
756 | } | |
757 | ||
758 | /* Mark clock available */ | |
759 | bus->clkstate = CLK_AVAIL; | |
760 | brcmf_dbg(INFO, "CLKCTL: turned ON\n"); | |
761 | ||
762 | #if defined(BCMDBG) | |
763 | if (bus->alp_only != true) { | |
764 | if (SBSDIO_ALPONLY(clkctl)) | |
765 | brcmf_dbg(ERROR, "HT Clock should be on\n"); | |
766 | } | |
767 | #endif /* defined (BCMDBG) */ | |
768 | ||
769 | bus->activity = true; | |
770 | } else { | |
771 | clkreq = 0; | |
772 | ||
773 | if (bus->clkstate == CLK_PENDING) { | |
774 | /* Cancel CA-only interrupt filter */ | |
775 | devctl = brcmf_sdcard_cfg_read(bus->sdiodev, | |
776 | SDIO_FUNC_1, | |
777 | SBSDIO_DEVICE_CTL, &err); | |
778 | devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY; | |
779 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
780 | SBSDIO_DEVICE_CTL, devctl, &err); | |
781 | } | |
782 | ||
783 | bus->clkstate = CLK_SDONLY; | |
784 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
785 | SBSDIO_FUNC1_CHIPCLKCSR, clkreq, &err); | |
786 | brcmf_dbg(INFO, "CLKCTL: turned OFF\n"); | |
787 | if (err) { | |
788 | brcmf_dbg(ERROR, "Failed access turning clock off: %d\n", | |
789 | err); | |
790 | return -EBADE; | |
791 | } | |
792 | } | |
793 | return 0; | |
794 | } | |
795 | ||
796 | /* Change idle/active SD state */ | |
797 | static int brcmf_sdbrcm_sdclk(struct brcmf_bus *bus, bool on) | |
798 | { | |
799 | brcmf_dbg(TRACE, "Enter\n"); | |
800 | ||
801 | if (on) | |
802 | bus->clkstate = CLK_SDONLY; | |
803 | else | |
804 | bus->clkstate = CLK_NONE; | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | /* Transition SD and backplane clock readiness */ | |
810 | static int brcmf_sdbrcm_clkctl(struct brcmf_bus *bus, uint target, bool pendok) | |
811 | { | |
812 | #ifdef BCMDBG | |
813 | uint oldstate = bus->clkstate; | |
814 | #endif /* BCMDBG */ | |
815 | ||
816 | brcmf_dbg(TRACE, "Enter\n"); | |
817 | ||
818 | /* Early exit if we're already there */ | |
819 | if (bus->clkstate == target) { | |
820 | if (target == CLK_AVAIL) { | |
821 | brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS); | |
822 | bus->activity = true; | |
823 | } | |
824 | return 0; | |
825 | } | |
826 | ||
827 | switch (target) { | |
828 | case CLK_AVAIL: | |
829 | /* Make sure SD clock is available */ | |
830 | if (bus->clkstate == CLK_NONE) | |
831 | brcmf_sdbrcm_sdclk(bus, true); | |
832 | /* Now request HT Avail on the backplane */ | |
833 | brcmf_sdbrcm_htclk(bus, true, pendok); | |
834 | brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS); | |
835 | bus->activity = true; | |
836 | break; | |
837 | ||
838 | case CLK_SDONLY: | |
839 | /* Remove HT request, or bring up SD clock */ | |
840 | if (bus->clkstate == CLK_NONE) | |
841 | brcmf_sdbrcm_sdclk(bus, true); | |
842 | else if (bus->clkstate == CLK_AVAIL) | |
843 | brcmf_sdbrcm_htclk(bus, false, false); | |
844 | else | |
845 | brcmf_dbg(ERROR, "request for %d -> %d\n", | |
846 | bus->clkstate, target); | |
847 | brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS); | |
848 | break; | |
849 | ||
850 | case CLK_NONE: | |
851 | /* Make sure to remove HT request */ | |
852 | if (bus->clkstate == CLK_AVAIL) | |
853 | brcmf_sdbrcm_htclk(bus, false, false); | |
854 | /* Now remove the SD clock */ | |
855 | brcmf_sdbrcm_sdclk(bus, false); | |
856 | brcmf_sdbrcm_wd_timer(bus, 0); | |
857 | break; | |
858 | } | |
859 | #ifdef BCMDBG | |
860 | brcmf_dbg(INFO, "%d -> %d\n", oldstate, bus->clkstate); | |
861 | #endif /* BCMDBG */ | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | static int brcmf_sdbrcm_bussleep(struct brcmf_bus *bus, bool sleep) | |
867 | { | |
868 | uint retries = 0; | |
869 | ||
870 | brcmf_dbg(INFO, "request %s (currently %s)\n", | |
871 | sleep ? "SLEEP" : "WAKE", | |
872 | bus->sleeping ? "SLEEP" : "WAKE"); | |
873 | ||
874 | /* Done if we're already in the requested state */ | |
875 | if (sleep == bus->sleeping) | |
876 | return 0; | |
877 | ||
878 | /* Going to sleep: set the alarm and turn off the lights... */ | |
879 | if (sleep) { | |
880 | /* Don't sleep if something is pending */ | |
881 | if (bus->dpc_sched || bus->rxskip || pktq_len(&bus->txq)) | |
882 | return -EBUSY; | |
883 | ||
884 | /* Make sure the controller has the bus up */ | |
885 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); | |
886 | ||
887 | /* Tell device to start using OOB wakeup */ | |
888 | w_sdreg32(bus, SMB_USE_OOB, | |
889 | offsetof(struct sdpcmd_regs, tosbmailbox), &retries); | |
890 | if (retries > retry_limit) | |
891 | brcmf_dbg(ERROR, "CANNOT SIGNAL CHIP, WILL NOT WAKE UP!!\n"); | |
892 | ||
893 | /* Turn off our contribution to the HT clock request */ | |
894 | brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false); | |
895 | ||
896 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
897 | SBSDIO_FUNC1_CHIPCLKCSR, | |
898 | SBSDIO_FORCE_HW_CLKREQ_OFF, NULL); | |
899 | ||
900 | /* Isolate the bus */ | |
718897eb FL |
901 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, |
902 | SBSDIO_DEVICE_CTL, | |
903 | SBSDIO_DEVCTL_PADS_ISO, NULL); | |
5b435de0 AS |
904 | |
905 | /* Change state */ | |
906 | bus->sleeping = true; | |
907 | ||
908 | } else { | |
909 | /* Waking up: bus power up is ok, set local state */ | |
910 | ||
911 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
912 | SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL); | |
913 | ||
914 | /* Force pad isolation off if possible | |
915 | (in case power never toggled) */ | |
99ba15cd FL |
916 | if ((bus->ci->c_inf[1].id == PCMCIA_CORE_ID) |
917 | && (bus->ci->c_inf[1].rev >= 10)) | |
5b435de0 AS |
918 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, |
919 | SBSDIO_DEVICE_CTL, 0, NULL); | |
920 | ||
921 | /* Make sure the controller has the bus up */ | |
922 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); | |
923 | ||
924 | /* Send misc interrupt to indicate OOB not needed */ | |
925 | w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, tosbmailboxdata), | |
926 | &retries); | |
927 | if (retries <= retry_limit) | |
928 | w_sdreg32(bus, SMB_DEV_INT, | |
929 | offsetof(struct sdpcmd_regs, tosbmailbox), | |
930 | &retries); | |
931 | ||
932 | if (retries > retry_limit) | |
933 | brcmf_dbg(ERROR, "CANNOT SIGNAL CHIP TO CLEAR OOB!!\n"); | |
934 | ||
935 | /* Make sure we have SD bus access */ | |
936 | brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false); | |
937 | ||
938 | /* Change state */ | |
939 | bus->sleeping = false; | |
940 | } | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
945 | static void bus_wake(struct brcmf_bus *bus) | |
946 | { | |
947 | if (bus->sleeping) | |
948 | brcmf_sdbrcm_bussleep(bus, false); | |
949 | } | |
950 | ||
951 | static u32 brcmf_sdbrcm_hostmail(struct brcmf_bus *bus) | |
952 | { | |
953 | u32 intstatus = 0; | |
954 | u32 hmb_data; | |
955 | u8 fcbits; | |
956 | uint retries = 0; | |
957 | ||
958 | brcmf_dbg(TRACE, "Enter\n"); | |
959 | ||
960 | /* Read mailbox data and ack that we did so */ | |
961 | r_sdreg32(bus, &hmb_data, | |
962 | offsetof(struct sdpcmd_regs, tohostmailboxdata), &retries); | |
963 | ||
964 | if (retries <= retry_limit) | |
965 | w_sdreg32(bus, SMB_INT_ACK, | |
966 | offsetof(struct sdpcmd_regs, tosbmailbox), &retries); | |
967 | bus->f1regdata += 2; | |
968 | ||
969 | /* Dongle recomposed rx frames, accept them again */ | |
970 | if (hmb_data & HMB_DATA_NAKHANDLED) { | |
971 | brcmf_dbg(INFO, "Dongle reports NAK handled, expect rtx of %d\n", | |
972 | bus->rx_seq); | |
973 | if (!bus->rxskip) | |
974 | brcmf_dbg(ERROR, "unexpected NAKHANDLED!\n"); | |
975 | ||
976 | bus->rxskip = false; | |
977 | intstatus |= I_HMB_FRAME_IND; | |
978 | } | |
979 | ||
980 | /* | |
981 | * DEVREADY does not occur with gSPI. | |
982 | */ | |
983 | if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) { | |
984 | bus->sdpcm_ver = | |
985 | (hmb_data & HMB_DATA_VERSION_MASK) >> | |
986 | HMB_DATA_VERSION_SHIFT; | |
987 | if (bus->sdpcm_ver != SDPCM_PROT_VERSION) | |
988 | brcmf_dbg(ERROR, "Version mismatch, dongle reports %d, " | |
989 | "expecting %d\n", | |
990 | bus->sdpcm_ver, SDPCM_PROT_VERSION); | |
991 | else | |
992 | brcmf_dbg(INFO, "Dongle ready, protocol version %d\n", | |
993 | bus->sdpcm_ver); | |
994 | } | |
995 | ||
996 | /* | |
997 | * Flow Control has been moved into the RX headers and this out of band | |
998 | * method isn't used any more. | |
999 | * remaining backward compatible with older dongles. | |
1000 | */ | |
1001 | if (hmb_data & HMB_DATA_FC) { | |
1002 | fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >> | |
1003 | HMB_DATA_FCDATA_SHIFT; | |
1004 | ||
1005 | if (fcbits & ~bus->flowcontrol) | |
1006 | bus->fc_xoff++; | |
1007 | ||
1008 | if (bus->flowcontrol & ~fcbits) | |
1009 | bus->fc_xon++; | |
1010 | ||
1011 | bus->fc_rcvd++; | |
1012 | bus->flowcontrol = fcbits; | |
1013 | } | |
1014 | ||
1015 | /* Shouldn't be any others */ | |
1016 | if (hmb_data & ~(HMB_DATA_DEVREADY | | |
1017 | HMB_DATA_NAKHANDLED | | |
1018 | HMB_DATA_FC | | |
1019 | HMB_DATA_FWREADY | | |
1020 | HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK)) | |
1021 | brcmf_dbg(ERROR, "Unknown mailbox data content: 0x%02x\n", | |
1022 | hmb_data); | |
1023 | ||
1024 | return intstatus; | |
1025 | } | |
1026 | ||
1027 | static void brcmf_sdbrcm_rxfail(struct brcmf_bus *bus, bool abort, bool rtx) | |
1028 | { | |
1029 | uint retries = 0; | |
1030 | u16 lastrbc; | |
1031 | u8 hi, lo; | |
1032 | int err; | |
1033 | ||
1034 | brcmf_dbg(ERROR, "%sterminate frame%s\n", | |
1035 | abort ? "abort command, " : "", | |
1036 | rtx ? ", send NAK" : ""); | |
1037 | ||
1038 | if (abort) | |
1039 | brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2); | |
1040 | ||
1041 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
1042 | SBSDIO_FUNC1_FRAMECTRL, | |
1043 | SFC_RF_TERM, &err); | |
1044 | bus->f1regdata++; | |
1045 | ||
1046 | /* Wait until the packet has been flushed (device/FIFO stable) */ | |
1047 | for (lastrbc = retries = 0xffff; retries > 0; retries--) { | |
1048 | hi = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
1049 | SBSDIO_FUNC1_RFRAMEBCHI, NULL); | |
1050 | lo = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
1051 | SBSDIO_FUNC1_RFRAMEBCLO, NULL); | |
1052 | bus->f1regdata += 2; | |
1053 | ||
1054 | if ((hi == 0) && (lo == 0)) | |
1055 | break; | |
1056 | ||
1057 | if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) { | |
1058 | brcmf_dbg(ERROR, "count growing: last 0x%04x now 0x%04x\n", | |
1059 | lastrbc, (hi << 8) + lo); | |
1060 | } | |
1061 | lastrbc = (hi << 8) + lo; | |
1062 | } | |
1063 | ||
1064 | if (!retries) | |
1065 | brcmf_dbg(ERROR, "count never zeroed: last 0x%04x\n", lastrbc); | |
1066 | else | |
1067 | brcmf_dbg(INFO, "flush took %d iterations\n", 0xffff - retries); | |
1068 | ||
1069 | if (rtx) { | |
1070 | bus->rxrtx++; | |
1071 | w_sdreg32(bus, SMB_NAK, | |
1072 | offsetof(struct sdpcmd_regs, tosbmailbox), &retries); | |
1073 | ||
1074 | bus->f1regdata++; | |
1075 | if (retries <= retry_limit) | |
1076 | bus->rxskip = true; | |
1077 | } | |
1078 | ||
1079 | /* Clear partial in any case */ | |
1080 | bus->nextlen = 0; | |
1081 | ||
1082 | /* If we can't reach the device, signal failure */ | |
1083 | if (err || brcmf_sdcard_regfail(bus->sdiodev)) | |
1084 | bus->drvr->busstate = BRCMF_BUS_DOWN; | |
1085 | } | |
1086 | ||
20e5ca16 AS |
1087 | /* copy a buffer into a pkt buffer chain */ |
1088 | static uint brcmf_sdbrcm_glom_from_buf(struct brcmf_bus *bus, uint len) | |
1089 | { | |
1090 | uint n, ret = 0; | |
1091 | struct sk_buff *p; | |
1092 | u8 *buf; | |
1093 | ||
20e5ca16 AS |
1094 | buf = bus->dataptr; |
1095 | ||
1096 | /* copy the data */ | |
b83db862 | 1097 | skb_queue_walk(&bus->glom, p) { |
20e5ca16 AS |
1098 | n = min_t(uint, p->len, len); |
1099 | memcpy(p->data, buf, n); | |
1100 | buf += n; | |
1101 | len -= n; | |
1102 | ret += n; | |
b83db862 AS |
1103 | if (!len) |
1104 | break; | |
20e5ca16 AS |
1105 | } |
1106 | ||
1107 | return ret; | |
1108 | } | |
1109 | ||
9a95e60e AS |
1110 | /* return total length of buffer chain */ |
1111 | static uint brcmf_sdbrcm_glom_len(struct brcmf_bus *bus) | |
1112 | { | |
1113 | struct sk_buff *p; | |
1114 | uint total; | |
1115 | ||
1116 | total = 0; | |
1117 | skb_queue_walk(&bus->glom, p) | |
1118 | total += p->len; | |
1119 | return total; | |
1120 | } | |
1121 | ||
5b435de0 AS |
1122 | static u8 brcmf_sdbrcm_rxglom(struct brcmf_bus *bus, u8 rxseq) |
1123 | { | |
1124 | u16 dlen, totlen; | |
1125 | u8 *dptr, num = 0; | |
1126 | ||
1127 | u16 sublen, check; | |
1128 | struct sk_buff *pfirst, *plast, *pnext, *save_pfirst; | |
1129 | ||
1130 | int errcode; | |
1131 | u8 chan, seq, doff, sfdoff; | |
1132 | u8 txmax; | |
1133 | ||
1134 | int ifidx = 0; | |
1135 | bool usechain = bus->use_rxchain; | |
1136 | ||
1137 | /* If packets, issue read(s) and send up packet chain */ | |
1138 | /* Return sequence numbers consumed? */ | |
1139 | ||
b83db862 AS |
1140 | brcmf_dbg(TRACE, "start: glomd %p glom %p\n", |
1141 | bus->glomd, skb_peek(&bus->glom)); | |
5b435de0 AS |
1142 | |
1143 | /* If there's a descriptor, generate the packet chain */ | |
1144 | if (bus->glomd) { | |
1145 | pfirst = plast = pnext = NULL; | |
1146 | dlen = (u16) (bus->glomd->len); | |
1147 | dptr = bus->glomd->data; | |
1148 | if (!dlen || (dlen & 1)) { | |
1149 | brcmf_dbg(ERROR, "bad glomd len(%d), ignore descriptor\n", | |
1150 | dlen); | |
1151 | dlen = 0; | |
1152 | } | |
1153 | ||
1154 | for (totlen = num = 0; dlen; num++) { | |
1155 | /* Get (and move past) next length */ | |
1156 | sublen = get_unaligned_le16(dptr); | |
1157 | dlen -= sizeof(u16); | |
1158 | dptr += sizeof(u16); | |
1159 | if ((sublen < SDPCM_HDRLEN) || | |
1160 | ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) { | |
1161 | brcmf_dbg(ERROR, "descriptor len %d bad: %d\n", | |
1162 | num, sublen); | |
1163 | pnext = NULL; | |
1164 | break; | |
1165 | } | |
1166 | if (sublen % BRCMF_SDALIGN) { | |
1167 | brcmf_dbg(ERROR, "sublen %d not multiple of %d\n", | |
1168 | sublen, BRCMF_SDALIGN); | |
1169 | usechain = false; | |
1170 | } | |
1171 | totlen += sublen; | |
1172 | ||
1173 | /* For last frame, adjust read len so total | |
1174 | is a block multiple */ | |
1175 | if (!dlen) { | |
1176 | sublen += | |
1177 | (roundup(totlen, bus->blocksize) - totlen); | |
1178 | totlen = roundup(totlen, bus->blocksize); | |
1179 | } | |
1180 | ||
1181 | /* Allocate/chain packet for next subframe */ | |
1182 | pnext = brcmu_pkt_buf_get_skb(sublen + BRCMF_SDALIGN); | |
1183 | if (pnext == NULL) { | |
1184 | brcmf_dbg(ERROR, "bcm_pkt_buf_get_skb failed, num %d len %d\n", | |
1185 | num, sublen); | |
1186 | break; | |
1187 | } | |
b83db862 | 1188 | skb_queue_tail(&bus->glom, pnext); |
5b435de0 AS |
1189 | |
1190 | /* Adhere to start alignment requirements */ | |
1191 | pkt_align(pnext, sublen, BRCMF_SDALIGN); | |
1192 | } | |
1193 | ||
1194 | /* If all allocations succeeded, save packet chain | |
1195 | in bus structure */ | |
1196 | if (pnext) { | |
1197 | brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n", | |
1198 | totlen, num); | |
1199 | if (BRCMF_GLOM_ON() && bus->nextlen && | |
1200 | totlen != bus->nextlen) { | |
1201 | brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n", | |
1202 | bus->nextlen, totlen, rxseq); | |
1203 | } | |
5b435de0 AS |
1204 | pfirst = pnext = NULL; |
1205 | } else { | |
b83db862 AS |
1206 | if (!skb_queue_empty(&bus->glom)) |
1207 | skb_queue_walk_safe(&bus->glom, pfirst, pnext) { | |
1208 | skb_unlink(pfirst, &bus->glom); | |
1209 | brcmu_pkt_buf_free_skb(pfirst); | |
1210 | } | |
5b435de0 AS |
1211 | num = 0; |
1212 | } | |
1213 | ||
1214 | /* Done with descriptor packet */ | |
1215 | brcmu_pkt_buf_free_skb(bus->glomd); | |
1216 | bus->glomd = NULL; | |
1217 | bus->nextlen = 0; | |
1218 | } | |
1219 | ||
1220 | /* Ok -- either we just generated a packet chain, | |
1221 | or had one from before */ | |
b83db862 | 1222 | if (!skb_queue_empty(&bus->glom)) { |
5b435de0 AS |
1223 | if (BRCMF_GLOM_ON()) { |
1224 | brcmf_dbg(GLOM, "try superframe read, packet chain:\n"); | |
b83db862 | 1225 | skb_queue_walk(&bus->glom, pnext) { |
5b435de0 AS |
1226 | brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n", |
1227 | pnext, (u8 *) (pnext->data), | |
1228 | pnext->len, pnext->len); | |
1229 | } | |
1230 | } | |
1231 | ||
b83db862 | 1232 | pfirst = skb_peek(&bus->glom); |
9a95e60e | 1233 | dlen = (u16) brcmf_sdbrcm_glom_len(bus); |
5b435de0 AS |
1234 | |
1235 | /* Do an SDIO read for the superframe. Configurable iovar to | |
1236 | * read directly into the chained packet, or allocate a large | |
1237 | * packet and and copy into the chain. | |
1238 | */ | |
1239 | if (usechain) { | |
1240 | errcode = brcmf_sdcard_recv_buf(bus->sdiodev, | |
1241 | bus->sdiodev->sbwad, | |
1242 | SDIO_FUNC_2, | |
1243 | F2SYNC, (u8 *) pfirst->data, dlen, | |
1244 | pfirst); | |
1245 | } else if (bus->dataptr) { | |
1246 | errcode = brcmf_sdcard_recv_buf(bus->sdiodev, | |
1247 | bus->sdiodev->sbwad, | |
1248 | SDIO_FUNC_2, | |
1249 | F2SYNC, bus->dataptr, dlen, | |
1250 | NULL); | |
20e5ca16 | 1251 | sublen = (u16) brcmf_sdbrcm_glom_from_buf(bus, dlen); |
5b435de0 AS |
1252 | if (sublen != dlen) { |
1253 | brcmf_dbg(ERROR, "FAILED TO COPY, dlen %d sublen %d\n", | |
1254 | dlen, sublen); | |
1255 | errcode = -1; | |
1256 | } | |
1257 | pnext = NULL; | |
1258 | } else { | |
1259 | brcmf_dbg(ERROR, "COULDN'T ALLOC %d-BYTE GLOM, FORCE FAILURE\n", | |
1260 | dlen); | |
1261 | errcode = -1; | |
1262 | } | |
1263 | bus->f2rxdata++; | |
1264 | ||
1265 | /* On failure, kill the superframe, allow a couple retries */ | |
1266 | if (errcode < 0) { | |
1267 | brcmf_dbg(ERROR, "glom read of %d bytes failed: %d\n", | |
1268 | dlen, errcode); | |
1269 | bus->drvr->rx_errors++; | |
1270 | ||
1271 | if (bus->glomerr++ < 3) { | |
1272 | brcmf_sdbrcm_rxfail(bus, true, true); | |
1273 | } else { | |
1274 | bus->glomerr = 0; | |
1275 | brcmf_sdbrcm_rxfail(bus, true, false); | |
5b435de0 | 1276 | bus->rxglomfail++; |
b83db862 AS |
1277 | skb_queue_walk_safe(&bus->glom, pfirst, pnext) { |
1278 | skb_unlink(pfirst, &bus->glom); | |
1279 | brcmu_pkt_buf_free_skb(pfirst); | |
1280 | } | |
5b435de0 AS |
1281 | } |
1282 | return 0; | |
1283 | } | |
1284 | #ifdef BCMDBG | |
1285 | if (BRCMF_GLOM_ON()) { | |
1286 | printk(KERN_DEBUG "SUPERFRAME:\n"); | |
1287 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
1288 | pfirst->data, min_t(int, pfirst->len, 48)); | |
1289 | } | |
1290 | #endif | |
1291 | ||
1292 | /* Validate the superframe header */ | |
1293 | dptr = (u8 *) (pfirst->data); | |
1294 | sublen = get_unaligned_le16(dptr); | |
1295 | check = get_unaligned_le16(dptr + sizeof(u16)); | |
1296 | ||
1297 | chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]); | |
1298 | seq = SDPCM_PACKET_SEQUENCE(&dptr[SDPCM_FRAMETAG_LEN]); | |
1299 | bus->nextlen = dptr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET]; | |
1300 | if ((bus->nextlen << 4) > MAX_RX_DATASZ) { | |
1301 | brcmf_dbg(INFO, "nextlen too large (%d) seq %d\n", | |
1302 | bus->nextlen, seq); | |
1303 | bus->nextlen = 0; | |
1304 | } | |
1305 | doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]); | |
1306 | txmax = SDPCM_WINDOW_VALUE(&dptr[SDPCM_FRAMETAG_LEN]); | |
1307 | ||
1308 | errcode = 0; | |
1309 | if ((u16)~(sublen ^ check)) { | |
1310 | brcmf_dbg(ERROR, "(superframe): HW hdr error: len/check 0x%04x/0x%04x\n", | |
1311 | sublen, check); | |
1312 | errcode = -1; | |
1313 | } else if (roundup(sublen, bus->blocksize) != dlen) { | |
1314 | brcmf_dbg(ERROR, "(superframe): len 0x%04x, rounded 0x%04x, expect 0x%04x\n", | |
1315 | sublen, roundup(sublen, bus->blocksize), | |
1316 | dlen); | |
1317 | errcode = -1; | |
1318 | } else if (SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]) != | |
1319 | SDPCM_GLOM_CHANNEL) { | |
1320 | brcmf_dbg(ERROR, "(superframe): bad channel %d\n", | |
1321 | SDPCM_PACKET_CHANNEL( | |
1322 | &dptr[SDPCM_FRAMETAG_LEN])); | |
1323 | errcode = -1; | |
1324 | } else if (SDPCM_GLOMDESC(&dptr[SDPCM_FRAMETAG_LEN])) { | |
1325 | brcmf_dbg(ERROR, "(superframe): got 2nd descriptor?\n"); | |
1326 | errcode = -1; | |
1327 | } else if ((doff < SDPCM_HDRLEN) || | |
1328 | (doff > (pfirst->len - SDPCM_HDRLEN))) { | |
1329 | brcmf_dbg(ERROR, "(superframe): Bad data offset %d: HW %d pkt %d min %d\n", | |
1330 | doff, sublen, pfirst->len, SDPCM_HDRLEN); | |
1331 | errcode = -1; | |
1332 | } | |
1333 | ||
1334 | /* Check sequence number of superframe SW header */ | |
1335 | if (rxseq != seq) { | |
1336 | brcmf_dbg(INFO, "(superframe) rx_seq %d, expected %d\n", | |
1337 | seq, rxseq); | |
1338 | bus->rx_badseq++; | |
1339 | rxseq = seq; | |
1340 | } | |
1341 | ||
1342 | /* Check window for sanity */ | |
1343 | if ((u8) (txmax - bus->tx_seq) > 0x40) { | |
1344 | brcmf_dbg(ERROR, "unlikely tx max %d with tx_seq %d\n", | |
1345 | txmax, bus->tx_seq); | |
1346 | txmax = bus->tx_seq + 2; | |
1347 | } | |
1348 | bus->tx_max = txmax; | |
1349 | ||
1350 | /* Remove superframe header, remember offset */ | |
1351 | skb_pull(pfirst, doff); | |
1352 | sfdoff = doff; | |
1353 | ||
1354 | /* Validate all the subframe headers */ | |
1355 | for (num = 0, pnext = pfirst; pnext && !errcode; | |
1356 | num++, pnext = pnext->next) { | |
1357 | dptr = (u8 *) (pnext->data); | |
1358 | dlen = (u16) (pnext->len); | |
1359 | sublen = get_unaligned_le16(dptr); | |
1360 | check = get_unaligned_le16(dptr + sizeof(u16)); | |
1361 | chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]); | |
1362 | doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]); | |
1363 | #ifdef BCMDBG | |
1364 | if (BRCMF_GLOM_ON()) { | |
1365 | printk(KERN_DEBUG "subframe:\n"); | |
1366 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
1367 | dptr, 32); | |
1368 | } | |
1369 | #endif | |
1370 | ||
1371 | if ((u16)~(sublen ^ check)) { | |
1372 | brcmf_dbg(ERROR, "(subframe %d): HW hdr error: len/check 0x%04x/0x%04x\n", | |
1373 | num, sublen, check); | |
1374 | errcode = -1; | |
1375 | } else if ((sublen > dlen) || (sublen < SDPCM_HDRLEN)) { | |
1376 | brcmf_dbg(ERROR, "(subframe %d): length mismatch: len 0x%04x, expect 0x%04x\n", | |
1377 | num, sublen, dlen); | |
1378 | errcode = -1; | |
1379 | } else if ((chan != SDPCM_DATA_CHANNEL) && | |
1380 | (chan != SDPCM_EVENT_CHANNEL)) { | |
1381 | brcmf_dbg(ERROR, "(subframe %d): bad channel %d\n", | |
1382 | num, chan); | |
1383 | errcode = -1; | |
1384 | } else if ((doff < SDPCM_HDRLEN) || (doff > sublen)) { | |
1385 | brcmf_dbg(ERROR, "(subframe %d): Bad data offset %d: HW %d min %d\n", | |
1386 | num, doff, sublen, SDPCM_HDRLEN); | |
1387 | errcode = -1; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | if (errcode) { | |
1392 | /* Terminate frame on error, request | |
1393 | a couple retries */ | |
1394 | if (bus->glomerr++ < 3) { | |
1395 | /* Restore superframe header space */ | |
1396 | skb_push(pfirst, sfdoff); | |
1397 | brcmf_sdbrcm_rxfail(bus, true, true); | |
1398 | } else { | |
1399 | bus->glomerr = 0; | |
1400 | brcmf_sdbrcm_rxfail(bus, true, false); | |
5b435de0 | 1401 | bus->rxglomfail++; |
b83db862 AS |
1402 | skb_queue_walk_safe(&bus->glom, pfirst, pnext) { |
1403 | skb_unlink(pfirst, &bus->glom); | |
1404 | brcmu_pkt_buf_free_skb(pfirst); | |
1405 | } | |
5b435de0 AS |
1406 | } |
1407 | bus->nextlen = 0; | |
1408 | return 0; | |
1409 | } | |
1410 | ||
1411 | /* Basic SD framing looks ok - process each packet (header) */ | |
1412 | save_pfirst = pfirst; | |
5b435de0 AS |
1413 | plast = NULL; |
1414 | ||
1415 | for (num = 0; pfirst; rxseq++, pfirst = pnext) { | |
1416 | pnext = pfirst->next; | |
1417 | pfirst->next = NULL; | |
1418 | ||
1419 | dptr = (u8 *) (pfirst->data); | |
1420 | sublen = get_unaligned_le16(dptr); | |
1421 | chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]); | |
1422 | seq = SDPCM_PACKET_SEQUENCE(&dptr[SDPCM_FRAMETAG_LEN]); | |
1423 | doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]); | |
1424 | ||
1425 | brcmf_dbg(GLOM, "Get subframe %d, %p(%p/%d), sublen %d chan %d seq %d\n", | |
1426 | num, pfirst, pfirst->data, | |
1427 | pfirst->len, sublen, chan, seq); | |
1428 | ||
1429 | /* precondition: chan == SDPCM_DATA_CHANNEL || | |
1430 | chan == SDPCM_EVENT_CHANNEL */ | |
1431 | ||
1432 | if (rxseq != seq) { | |
1433 | brcmf_dbg(GLOM, "rx_seq %d, expected %d\n", | |
1434 | seq, rxseq); | |
1435 | bus->rx_badseq++; | |
1436 | rxseq = seq; | |
1437 | } | |
1438 | #ifdef BCMDBG | |
1439 | if (BRCMF_BYTES_ON() && BRCMF_DATA_ON()) { | |
1440 | printk(KERN_DEBUG "Rx Subframe Data:\n"); | |
1441 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
1442 | dptr, dlen); | |
1443 | } | |
1444 | #endif | |
1445 | ||
1446 | __skb_trim(pfirst, sublen); | |
1447 | skb_pull(pfirst, doff); | |
1448 | ||
1449 | if (pfirst->len == 0) { | |
1450 | brcmu_pkt_buf_free_skb(pfirst); | |
1451 | if (plast) | |
1452 | plast->next = pnext; | |
1453 | else | |
1454 | save_pfirst = pnext; | |
1455 | ||
1456 | continue; | |
1457 | } else if (brcmf_proto_hdrpull(bus->drvr, &ifidx, | |
1458 | pfirst) != 0) { | |
1459 | brcmf_dbg(ERROR, "rx protocol error\n"); | |
1460 | bus->drvr->rx_errors++; | |
1461 | brcmu_pkt_buf_free_skb(pfirst); | |
1462 | if (plast) | |
1463 | plast->next = pnext; | |
1464 | else | |
1465 | save_pfirst = pnext; | |
1466 | ||
1467 | continue; | |
1468 | } | |
1469 | ||
1470 | /* this packet will go up, link back into | |
1471 | chain and count it */ | |
1472 | pfirst->next = pnext; | |
1473 | plast = pfirst; | |
1474 | num++; | |
1475 | ||
1476 | #ifdef BCMDBG | |
1477 | if (BRCMF_GLOM_ON()) { | |
1478 | brcmf_dbg(GLOM, "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n", | |
1479 | num, pfirst, pfirst->data, | |
1480 | pfirst->len, pfirst->next, | |
1481 | pfirst->prev); | |
1482 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
1483 | pfirst->data, | |
1484 | min_t(int, pfirst->len, 32)); | |
1485 | } | |
1486 | #endif /* BCMDBG */ | |
1487 | } | |
1488 | if (num) { | |
1489 | up(&bus->sdsem); | |
1490 | brcmf_rx_frame(bus->drvr, ifidx, save_pfirst, num); | |
1491 | down(&bus->sdsem); | |
1492 | } | |
1493 | ||
1494 | bus->rxglomframes++; | |
1495 | bus->rxglompkts += num; | |
1496 | } | |
1497 | return num; | |
1498 | } | |
1499 | ||
1500 | static int brcmf_sdbrcm_dcmd_resp_wait(struct brcmf_bus *bus, uint *condition, | |
1501 | bool *pending) | |
1502 | { | |
1503 | DECLARE_WAITQUEUE(wait, current); | |
1504 | int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT); | |
1505 | ||
1506 | /* Wait until control frame is available */ | |
1507 | add_wait_queue(&bus->dcmd_resp_wait, &wait); | |
1508 | set_current_state(TASK_INTERRUPTIBLE); | |
1509 | ||
1510 | while (!(*condition) && (!signal_pending(current) && timeout)) | |
1511 | timeout = schedule_timeout(timeout); | |
1512 | ||
1513 | if (signal_pending(current)) | |
1514 | *pending = true; | |
1515 | ||
1516 | set_current_state(TASK_RUNNING); | |
1517 | remove_wait_queue(&bus->dcmd_resp_wait, &wait); | |
1518 | ||
1519 | return timeout; | |
1520 | } | |
1521 | ||
1522 | static int brcmf_sdbrcm_dcmd_resp_wake(struct brcmf_bus *bus) | |
1523 | { | |
1524 | if (waitqueue_active(&bus->dcmd_resp_wait)) | |
1525 | wake_up_interruptible(&bus->dcmd_resp_wait); | |
1526 | ||
1527 | return 0; | |
1528 | } | |
1529 | static void | |
1530 | brcmf_sdbrcm_read_control(struct brcmf_bus *bus, u8 *hdr, uint len, uint doff) | |
1531 | { | |
1532 | uint rdlen, pad; | |
1533 | ||
1534 | int sdret; | |
1535 | ||
1536 | brcmf_dbg(TRACE, "Enter\n"); | |
1537 | ||
1538 | /* Set rxctl for frame (w/optional alignment) */ | |
1539 | bus->rxctl = bus->rxbuf; | |
1540 | bus->rxctl += BRCMF_FIRSTREAD; | |
1541 | pad = ((unsigned long)bus->rxctl % BRCMF_SDALIGN); | |
1542 | if (pad) | |
1543 | bus->rxctl += (BRCMF_SDALIGN - pad); | |
1544 | bus->rxctl -= BRCMF_FIRSTREAD; | |
1545 | ||
1546 | /* Copy the already-read portion over */ | |
1547 | memcpy(bus->rxctl, hdr, BRCMF_FIRSTREAD); | |
1548 | if (len <= BRCMF_FIRSTREAD) | |
1549 | goto gotpkt; | |
1550 | ||
1551 | /* Raise rdlen to next SDIO block to avoid tail command */ | |
1552 | rdlen = len - BRCMF_FIRSTREAD; | |
1553 | if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) { | |
1554 | pad = bus->blocksize - (rdlen % bus->blocksize); | |
1555 | if ((pad <= bus->roundup) && (pad < bus->blocksize) && | |
1556 | ((len + pad) < bus->drvr->maxctl)) | |
1557 | rdlen += pad; | |
1558 | } else if (rdlen % BRCMF_SDALIGN) { | |
1559 | rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN); | |
1560 | } | |
1561 | ||
1562 | /* Satisfy length-alignment requirements */ | |
1563 | if (rdlen & (ALIGNMENT - 1)) | |
1564 | rdlen = roundup(rdlen, ALIGNMENT); | |
1565 | ||
1566 | /* Drop if the read is too big or it exceeds our maximum */ | |
1567 | if ((rdlen + BRCMF_FIRSTREAD) > bus->drvr->maxctl) { | |
1568 | brcmf_dbg(ERROR, "%d-byte control read exceeds %d-byte buffer\n", | |
1569 | rdlen, bus->drvr->maxctl); | |
1570 | bus->drvr->rx_errors++; | |
1571 | brcmf_sdbrcm_rxfail(bus, false, false); | |
1572 | goto done; | |
1573 | } | |
1574 | ||
1575 | if ((len - doff) > bus->drvr->maxctl) { | |
1576 | brcmf_dbg(ERROR, "%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n", | |
1577 | len, len - doff, bus->drvr->maxctl); | |
1578 | bus->drvr->rx_errors++; | |
1579 | bus->rx_toolong++; | |
1580 | brcmf_sdbrcm_rxfail(bus, false, false); | |
1581 | goto done; | |
1582 | } | |
1583 | ||
1584 | /* Read remainder of frame body into the rxctl buffer */ | |
1585 | sdret = brcmf_sdcard_recv_buf(bus->sdiodev, | |
1586 | bus->sdiodev->sbwad, | |
1587 | SDIO_FUNC_2, | |
1588 | F2SYNC, (bus->rxctl + BRCMF_FIRSTREAD), rdlen, | |
1589 | NULL); | |
1590 | bus->f2rxdata++; | |
1591 | ||
1592 | /* Control frame failures need retransmission */ | |
1593 | if (sdret < 0) { | |
1594 | brcmf_dbg(ERROR, "read %d control bytes failed: %d\n", | |
1595 | rdlen, sdret); | |
1596 | bus->rxc_errors++; | |
1597 | brcmf_sdbrcm_rxfail(bus, true, true); | |
1598 | goto done; | |
1599 | } | |
1600 | ||
1601 | gotpkt: | |
1602 | ||
1603 | #ifdef BCMDBG | |
1604 | if (BRCMF_BYTES_ON() && BRCMF_CTL_ON()) { | |
1605 | printk(KERN_DEBUG "RxCtrl:\n"); | |
1606 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, bus->rxctl, len); | |
1607 | } | |
1608 | #endif | |
1609 | ||
1610 | /* Point to valid data and indicate its length */ | |
1611 | bus->rxctl += doff; | |
1612 | bus->rxlen = len - doff; | |
1613 | ||
1614 | done: | |
1615 | /* Awake any waiters */ | |
1616 | brcmf_sdbrcm_dcmd_resp_wake(bus); | |
1617 | } | |
1618 | ||
1619 | /* Pad read to blocksize for efficiency */ | |
1620 | static void brcmf_pad(struct brcmf_bus *bus, u16 *pad, u16 *rdlen) | |
1621 | { | |
1622 | if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) { | |
1623 | *pad = bus->blocksize - (*rdlen % bus->blocksize); | |
1624 | if (*pad <= bus->roundup && *pad < bus->blocksize && | |
1625 | *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ) | |
1626 | *rdlen += *pad; | |
1627 | } else if (*rdlen % BRCMF_SDALIGN) { | |
1628 | *rdlen += BRCMF_SDALIGN - (*rdlen % BRCMF_SDALIGN); | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | static void | |
1633 | brcmf_alloc_pkt_and_read(struct brcmf_bus *bus, u16 rdlen, | |
1634 | struct sk_buff **pkt, u8 **rxbuf) | |
1635 | { | |
1636 | int sdret; /* Return code from calls */ | |
1637 | ||
1638 | *pkt = brcmu_pkt_buf_get_skb(rdlen + BRCMF_SDALIGN); | |
1639 | if (*pkt == NULL) | |
1640 | return; | |
1641 | ||
1642 | pkt_align(*pkt, rdlen, BRCMF_SDALIGN); | |
1643 | *rxbuf = (u8 *) ((*pkt)->data); | |
1644 | /* Read the entire frame */ | |
1645 | sdret = brcmf_sdcard_recv_buf(bus->sdiodev, bus->sdiodev->sbwad, | |
1646 | SDIO_FUNC_2, F2SYNC, | |
1647 | *rxbuf, rdlen, *pkt); | |
1648 | bus->f2rxdata++; | |
1649 | ||
1650 | if (sdret < 0) { | |
1651 | brcmf_dbg(ERROR, "(nextlen): read %d bytes failed: %d\n", | |
1652 | rdlen, sdret); | |
1653 | brcmu_pkt_buf_free_skb(*pkt); | |
1654 | bus->drvr->rx_errors++; | |
1655 | /* Force retry w/normal header read. | |
1656 | * Don't attempt NAK for | |
1657 | * gSPI | |
1658 | */ | |
1659 | brcmf_sdbrcm_rxfail(bus, true, true); | |
1660 | *pkt = NULL; | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | /* Checks the header */ | |
1665 | static int | |
1666 | brcmf_check_rxbuf(struct brcmf_bus *bus, struct sk_buff *pkt, u8 *rxbuf, | |
1667 | u8 rxseq, u16 nextlen, u16 *len) | |
1668 | { | |
1669 | u16 check; | |
1670 | bool len_consistent; /* Result of comparing readahead len and | |
1671 | len from hw-hdr */ | |
1672 | ||
1673 | memcpy(bus->rxhdr, rxbuf, SDPCM_HDRLEN); | |
1674 | ||
1675 | /* Extract hardware header fields */ | |
1676 | *len = get_unaligned_le16(bus->rxhdr); | |
1677 | check = get_unaligned_le16(bus->rxhdr + sizeof(u16)); | |
1678 | ||
1679 | /* All zeros means readahead info was bad */ | |
1680 | if (!(*len | check)) { | |
1681 | brcmf_dbg(INFO, "(nextlen): read zeros in HW header???\n"); | |
1682 | goto fail; | |
1683 | } | |
1684 | ||
1685 | /* Validate check bytes */ | |
1686 | if ((u16)~(*len ^ check)) { | |
1687 | brcmf_dbg(ERROR, "(nextlen): HW hdr error: nextlen/len/check 0x%04x/0x%04x/0x%04x\n", | |
1688 | nextlen, *len, check); | |
1689 | bus->rx_badhdr++; | |
1690 | brcmf_sdbrcm_rxfail(bus, false, false); | |
1691 | goto fail; | |
1692 | } | |
1693 | ||
1694 | /* Validate frame length */ | |
1695 | if (*len < SDPCM_HDRLEN) { | |
1696 | brcmf_dbg(ERROR, "(nextlen): HW hdr length invalid: %d\n", | |
1697 | *len); | |
1698 | goto fail; | |
1699 | } | |
1700 | ||
1701 | /* Check for consistency with readahead info */ | |
1702 | len_consistent = (nextlen != (roundup(*len, 16) >> 4)); | |
1703 | if (len_consistent) { | |
1704 | /* Mismatch, force retry w/normal | |
1705 | header (may be >4K) */ | |
1706 | brcmf_dbg(ERROR, "(nextlen): mismatch, nextlen %d len %d rnd %d; expected rxseq %d\n", | |
1707 | nextlen, *len, roundup(*len, 16), | |
1708 | rxseq); | |
1709 | brcmf_sdbrcm_rxfail(bus, true, true); | |
1710 | goto fail; | |
1711 | } | |
1712 | ||
1713 | return 0; | |
1714 | ||
1715 | fail: | |
1716 | brcmf_sdbrcm_pktfree2(bus, pkt); | |
1717 | return -EINVAL; | |
1718 | } | |
1719 | ||
1720 | /* Return true if there may be more frames to read */ | |
1721 | static uint | |
1722 | brcmf_sdbrcm_readframes(struct brcmf_bus *bus, uint maxframes, bool *finished) | |
1723 | { | |
1724 | u16 len, check; /* Extracted hardware header fields */ | |
1725 | u8 chan, seq, doff; /* Extracted software header fields */ | |
1726 | u8 fcbits; /* Extracted fcbits from software header */ | |
1727 | ||
1728 | struct sk_buff *pkt; /* Packet for event or data frames */ | |
1729 | u16 pad; /* Number of pad bytes to read */ | |
1730 | u16 rdlen; /* Total number of bytes to read */ | |
1731 | u8 rxseq; /* Next sequence number to expect */ | |
1732 | uint rxleft = 0; /* Remaining number of frames allowed */ | |
1733 | int sdret; /* Return code from calls */ | |
1734 | u8 txmax; /* Maximum tx sequence offered */ | |
1735 | u8 *rxbuf; | |
1736 | int ifidx = 0; | |
1737 | uint rxcount = 0; /* Total frames read */ | |
1738 | ||
1739 | brcmf_dbg(TRACE, "Enter\n"); | |
1740 | ||
1741 | /* Not finished unless we encounter no more frames indication */ | |
1742 | *finished = false; | |
1743 | ||
1744 | for (rxseq = bus->rx_seq, rxleft = maxframes; | |
1745 | !bus->rxskip && rxleft && bus->drvr->busstate != BRCMF_BUS_DOWN; | |
1746 | rxseq++, rxleft--) { | |
1747 | ||
1748 | /* Handle glomming separately */ | |
b83db862 | 1749 | if (bus->glomd || !skb_queue_empty(&bus->glom)) { |
5b435de0 AS |
1750 | u8 cnt; |
1751 | brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n", | |
b83db862 | 1752 | bus->glomd, skb_peek(&bus->glom)); |
5b435de0 AS |
1753 | cnt = brcmf_sdbrcm_rxglom(bus, rxseq); |
1754 | brcmf_dbg(GLOM, "rxglom returned %d\n", cnt); | |
1755 | rxseq += cnt - 1; | |
1756 | rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1; | |
1757 | continue; | |
1758 | } | |
1759 | ||
1760 | /* Try doing single read if we can */ | |
1761 | if (bus->nextlen) { | |
1762 | u16 nextlen = bus->nextlen; | |
1763 | bus->nextlen = 0; | |
1764 | ||
1765 | rdlen = len = nextlen << 4; | |
1766 | brcmf_pad(bus, &pad, &rdlen); | |
1767 | ||
1768 | /* | |
1769 | * After the frame is received we have to | |
1770 | * distinguish whether it is data | |
1771 | * or non-data frame. | |
1772 | */ | |
1773 | brcmf_alloc_pkt_and_read(bus, rdlen, &pkt, &rxbuf); | |
1774 | if (pkt == NULL) { | |
1775 | /* Give up on data, request rtx of events */ | |
1776 | brcmf_dbg(ERROR, "(nextlen): brcmf_alloc_pkt_and_read failed: len %d rdlen %d expected rxseq %d\n", | |
1777 | len, rdlen, rxseq); | |
1778 | continue; | |
1779 | } | |
1780 | ||
1781 | if (brcmf_check_rxbuf(bus, pkt, rxbuf, rxseq, nextlen, | |
1782 | &len) < 0) | |
1783 | continue; | |
1784 | ||
1785 | /* Extract software header fields */ | |
1786 | chan = SDPCM_PACKET_CHANNEL( | |
1787 | &bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1788 | seq = SDPCM_PACKET_SEQUENCE( | |
1789 | &bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1790 | doff = SDPCM_DOFFSET_VALUE( | |
1791 | &bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1792 | txmax = SDPCM_WINDOW_VALUE( | |
1793 | &bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1794 | ||
1795 | bus->nextlen = | |
1796 | bus->rxhdr[SDPCM_FRAMETAG_LEN + | |
1797 | SDPCM_NEXTLEN_OFFSET]; | |
1798 | if ((bus->nextlen << 4) > MAX_RX_DATASZ) { | |
1799 | brcmf_dbg(INFO, "(nextlen): got frame w/nextlen too large (%d), seq %d\n", | |
1800 | bus->nextlen, seq); | |
1801 | bus->nextlen = 0; | |
1802 | } | |
1803 | ||
1804 | bus->drvr->rx_readahead_cnt++; | |
1805 | ||
1806 | /* Handle Flow Control */ | |
1807 | fcbits = SDPCM_FCMASK_VALUE( | |
1808 | &bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1809 | ||
1810 | if (bus->flowcontrol != fcbits) { | |
1811 | if (~bus->flowcontrol & fcbits) | |
1812 | bus->fc_xoff++; | |
1813 | ||
1814 | if (bus->flowcontrol & ~fcbits) | |
1815 | bus->fc_xon++; | |
1816 | ||
1817 | bus->fc_rcvd++; | |
1818 | bus->flowcontrol = fcbits; | |
1819 | } | |
1820 | ||
1821 | /* Check and update sequence number */ | |
1822 | if (rxseq != seq) { | |
1823 | brcmf_dbg(INFO, "(nextlen): rx_seq %d, expected %d\n", | |
1824 | seq, rxseq); | |
1825 | bus->rx_badseq++; | |
1826 | rxseq = seq; | |
1827 | } | |
1828 | ||
1829 | /* Check window for sanity */ | |
1830 | if ((u8) (txmax - bus->tx_seq) > 0x40) { | |
1831 | brcmf_dbg(ERROR, "got unlikely tx max %d with tx_seq %d\n", | |
1832 | txmax, bus->tx_seq); | |
1833 | txmax = bus->tx_seq + 2; | |
1834 | } | |
1835 | bus->tx_max = txmax; | |
1836 | ||
1837 | #ifdef BCMDBG | |
1838 | if (BRCMF_BYTES_ON() && BRCMF_DATA_ON()) { | |
1839 | printk(KERN_DEBUG "Rx Data:\n"); | |
1840 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
1841 | rxbuf, len); | |
1842 | } else if (BRCMF_HDRS_ON()) { | |
1843 | printk(KERN_DEBUG "RxHdr:\n"); | |
1844 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
1845 | bus->rxhdr, SDPCM_HDRLEN); | |
1846 | } | |
1847 | #endif | |
1848 | ||
1849 | if (chan == SDPCM_CONTROL_CHANNEL) { | |
1850 | brcmf_dbg(ERROR, "(nextlen): readahead on control packet %d?\n", | |
1851 | seq); | |
1852 | /* Force retry w/normal header read */ | |
1853 | bus->nextlen = 0; | |
1854 | brcmf_sdbrcm_rxfail(bus, false, true); | |
1855 | brcmf_sdbrcm_pktfree2(bus, pkt); | |
1856 | continue; | |
1857 | } | |
1858 | ||
1859 | /* Validate data offset */ | |
1860 | if ((doff < SDPCM_HDRLEN) || (doff > len)) { | |
1861 | brcmf_dbg(ERROR, "(nextlen): bad data offset %d: HW len %d min %d\n", | |
1862 | doff, len, SDPCM_HDRLEN); | |
1863 | brcmf_sdbrcm_rxfail(bus, false, false); | |
1864 | brcmf_sdbrcm_pktfree2(bus, pkt); | |
1865 | continue; | |
1866 | } | |
1867 | ||
1868 | /* All done with this one -- now deliver the packet */ | |
1869 | goto deliver; | |
1870 | } | |
1871 | ||
1872 | /* Read frame header (hardware and software) */ | |
1873 | sdret = brcmf_sdcard_recv_buf(bus->sdiodev, bus->sdiodev->sbwad, | |
1874 | SDIO_FUNC_2, F2SYNC, bus->rxhdr, | |
1875 | BRCMF_FIRSTREAD, NULL); | |
1876 | bus->f2rxhdrs++; | |
1877 | ||
1878 | if (sdret < 0) { | |
1879 | brcmf_dbg(ERROR, "RXHEADER FAILED: %d\n", sdret); | |
1880 | bus->rx_hdrfail++; | |
1881 | brcmf_sdbrcm_rxfail(bus, true, true); | |
1882 | continue; | |
1883 | } | |
1884 | #ifdef BCMDBG | |
1885 | if (BRCMF_BYTES_ON() || BRCMF_HDRS_ON()) { | |
1886 | printk(KERN_DEBUG "RxHdr:\n"); | |
1887 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
1888 | bus->rxhdr, SDPCM_HDRLEN); | |
1889 | } | |
1890 | #endif | |
1891 | ||
1892 | /* Extract hardware header fields */ | |
1893 | len = get_unaligned_le16(bus->rxhdr); | |
1894 | check = get_unaligned_le16(bus->rxhdr + sizeof(u16)); | |
1895 | ||
1896 | /* All zeros means no more frames */ | |
1897 | if (!(len | check)) { | |
1898 | *finished = true; | |
1899 | break; | |
1900 | } | |
1901 | ||
1902 | /* Validate check bytes */ | |
1903 | if ((u16) ~(len ^ check)) { | |
1904 | brcmf_dbg(ERROR, "HW hdr err: len/check 0x%04x/0x%04x\n", | |
1905 | len, check); | |
1906 | bus->rx_badhdr++; | |
1907 | brcmf_sdbrcm_rxfail(bus, false, false); | |
1908 | continue; | |
1909 | } | |
1910 | ||
1911 | /* Validate frame length */ | |
1912 | if (len < SDPCM_HDRLEN) { | |
1913 | brcmf_dbg(ERROR, "HW hdr length invalid: %d\n", len); | |
1914 | continue; | |
1915 | } | |
1916 | ||
1917 | /* Extract software header fields */ | |
1918 | chan = SDPCM_PACKET_CHANNEL(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1919 | seq = SDPCM_PACKET_SEQUENCE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1920 | doff = SDPCM_DOFFSET_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1921 | txmax = SDPCM_WINDOW_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1922 | ||
1923 | /* Validate data offset */ | |
1924 | if ((doff < SDPCM_HDRLEN) || (doff > len)) { | |
1925 | brcmf_dbg(ERROR, "Bad data offset %d: HW len %d, min %d seq %d\n", | |
1926 | doff, len, SDPCM_HDRLEN, seq); | |
1927 | bus->rx_badhdr++; | |
1928 | brcmf_sdbrcm_rxfail(bus, false, false); | |
1929 | continue; | |
1930 | } | |
1931 | ||
1932 | /* Save the readahead length if there is one */ | |
1933 | bus->nextlen = | |
1934 | bus->rxhdr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET]; | |
1935 | if ((bus->nextlen << 4) > MAX_RX_DATASZ) { | |
1936 | brcmf_dbg(INFO, "(nextlen): got frame w/nextlen too large (%d), seq %d\n", | |
1937 | bus->nextlen, seq); | |
1938 | bus->nextlen = 0; | |
1939 | } | |
1940 | ||
1941 | /* Handle Flow Control */ | |
1942 | fcbits = SDPCM_FCMASK_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]); | |
1943 | ||
1944 | if (bus->flowcontrol != fcbits) { | |
1945 | if (~bus->flowcontrol & fcbits) | |
1946 | bus->fc_xoff++; | |
1947 | ||
1948 | if (bus->flowcontrol & ~fcbits) | |
1949 | bus->fc_xon++; | |
1950 | ||
1951 | bus->fc_rcvd++; | |
1952 | bus->flowcontrol = fcbits; | |
1953 | } | |
1954 | ||
1955 | /* Check and update sequence number */ | |
1956 | if (rxseq != seq) { | |
1957 | brcmf_dbg(INFO, "rx_seq %d, expected %d\n", seq, rxseq); | |
1958 | bus->rx_badseq++; | |
1959 | rxseq = seq; | |
1960 | } | |
1961 | ||
1962 | /* Check window for sanity */ | |
1963 | if ((u8) (txmax - bus->tx_seq) > 0x40) { | |
1964 | brcmf_dbg(ERROR, "unlikely tx max %d with tx_seq %d\n", | |
1965 | txmax, bus->tx_seq); | |
1966 | txmax = bus->tx_seq + 2; | |
1967 | } | |
1968 | bus->tx_max = txmax; | |
1969 | ||
1970 | /* Call a separate function for control frames */ | |
1971 | if (chan == SDPCM_CONTROL_CHANNEL) { | |
1972 | brcmf_sdbrcm_read_control(bus, bus->rxhdr, len, doff); | |
1973 | continue; | |
1974 | } | |
1975 | ||
1976 | /* precondition: chan is either SDPCM_DATA_CHANNEL, | |
1977 | SDPCM_EVENT_CHANNEL, SDPCM_TEST_CHANNEL or | |
1978 | SDPCM_GLOM_CHANNEL */ | |
1979 | ||
1980 | /* Length to read */ | |
1981 | rdlen = (len > BRCMF_FIRSTREAD) ? (len - BRCMF_FIRSTREAD) : 0; | |
1982 | ||
1983 | /* May pad read to blocksize for efficiency */ | |
1984 | if (bus->roundup && bus->blocksize && | |
1985 | (rdlen > bus->blocksize)) { | |
1986 | pad = bus->blocksize - (rdlen % bus->blocksize); | |
1987 | if ((pad <= bus->roundup) && (pad < bus->blocksize) && | |
1988 | ((rdlen + pad + BRCMF_FIRSTREAD) < MAX_RX_DATASZ)) | |
1989 | rdlen += pad; | |
1990 | } else if (rdlen % BRCMF_SDALIGN) { | |
1991 | rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN); | |
1992 | } | |
1993 | ||
1994 | /* Satisfy length-alignment requirements */ | |
1995 | if (rdlen & (ALIGNMENT - 1)) | |
1996 | rdlen = roundup(rdlen, ALIGNMENT); | |
1997 | ||
1998 | if ((rdlen + BRCMF_FIRSTREAD) > MAX_RX_DATASZ) { | |
1999 | /* Too long -- skip this frame */ | |
2000 | brcmf_dbg(ERROR, "too long: len %d rdlen %d\n", | |
2001 | len, rdlen); | |
2002 | bus->drvr->rx_errors++; | |
2003 | bus->rx_toolong++; | |
2004 | brcmf_sdbrcm_rxfail(bus, false, false); | |
2005 | continue; | |
2006 | } | |
2007 | ||
2008 | pkt = brcmu_pkt_buf_get_skb(rdlen + | |
2009 | BRCMF_FIRSTREAD + BRCMF_SDALIGN); | |
2010 | if (!pkt) { | |
2011 | /* Give up on data, request rtx of events */ | |
2012 | brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: rdlen %d chan %d\n", | |
2013 | rdlen, chan); | |
2014 | bus->drvr->rx_dropped++; | |
2015 | brcmf_sdbrcm_rxfail(bus, false, RETRYCHAN(chan)); | |
2016 | continue; | |
2017 | } | |
2018 | ||
2019 | /* Leave room for what we already read, and align remainder */ | |
2020 | skb_pull(pkt, BRCMF_FIRSTREAD); | |
2021 | pkt_align(pkt, rdlen, BRCMF_SDALIGN); | |
2022 | ||
2023 | /* Read the remaining frame data */ | |
2024 | sdret = brcmf_sdcard_recv_buf(bus->sdiodev, bus->sdiodev->sbwad, | |
2025 | SDIO_FUNC_2, F2SYNC, ((u8 *) (pkt->data)), | |
2026 | rdlen, pkt); | |
2027 | bus->f2rxdata++; | |
2028 | ||
2029 | if (sdret < 0) { | |
2030 | brcmf_dbg(ERROR, "read %d %s bytes failed: %d\n", rdlen, | |
2031 | ((chan == SDPCM_EVENT_CHANNEL) ? "event" | |
2032 | : ((chan == SDPCM_DATA_CHANNEL) ? "data" | |
2033 | : "test")), sdret); | |
2034 | brcmu_pkt_buf_free_skb(pkt); | |
2035 | bus->drvr->rx_errors++; | |
2036 | brcmf_sdbrcm_rxfail(bus, true, RETRYCHAN(chan)); | |
2037 | continue; | |
2038 | } | |
2039 | ||
2040 | /* Copy the already-read portion */ | |
2041 | skb_push(pkt, BRCMF_FIRSTREAD); | |
2042 | memcpy(pkt->data, bus->rxhdr, BRCMF_FIRSTREAD); | |
2043 | ||
2044 | #ifdef BCMDBG | |
2045 | if (BRCMF_BYTES_ON() && BRCMF_DATA_ON()) { | |
2046 | printk(KERN_DEBUG "Rx Data:\n"); | |
2047 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
2048 | pkt->data, len); | |
2049 | } | |
2050 | #endif | |
2051 | ||
2052 | deliver: | |
2053 | /* Save superframe descriptor and allocate packet frame */ | |
2054 | if (chan == SDPCM_GLOM_CHANNEL) { | |
2055 | if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_FRAMETAG_LEN])) { | |
2056 | brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n", | |
2057 | len); | |
2058 | #ifdef BCMDBG | |
2059 | if (BRCMF_GLOM_ON()) { | |
2060 | printk(KERN_DEBUG "Glom Data:\n"); | |
2061 | print_hex_dump_bytes("", | |
2062 | DUMP_PREFIX_OFFSET, | |
2063 | pkt->data, len); | |
2064 | } | |
2065 | #endif | |
2066 | __skb_trim(pkt, len); | |
2067 | skb_pull(pkt, SDPCM_HDRLEN); | |
2068 | bus->glomd = pkt; | |
2069 | } else { | |
2070 | brcmf_dbg(ERROR, "%s: glom superframe w/o " | |
2071 | "descriptor!\n", __func__); | |
2072 | brcmf_sdbrcm_rxfail(bus, false, false); | |
2073 | } | |
2074 | continue; | |
2075 | } | |
2076 | ||
2077 | /* Fill in packet len and prio, deliver upward */ | |
2078 | __skb_trim(pkt, len); | |
2079 | skb_pull(pkt, doff); | |
2080 | ||
2081 | if (pkt->len == 0) { | |
2082 | brcmu_pkt_buf_free_skb(pkt); | |
2083 | continue; | |
2084 | } else if (brcmf_proto_hdrpull(bus->drvr, &ifidx, pkt) != 0) { | |
2085 | brcmf_dbg(ERROR, "rx protocol error\n"); | |
2086 | brcmu_pkt_buf_free_skb(pkt); | |
2087 | bus->drvr->rx_errors++; | |
2088 | continue; | |
2089 | } | |
2090 | ||
2091 | /* Unlock during rx call */ | |
2092 | up(&bus->sdsem); | |
2093 | brcmf_rx_frame(bus->drvr, ifidx, pkt, 1); | |
2094 | down(&bus->sdsem); | |
2095 | } | |
2096 | rxcount = maxframes - rxleft; | |
2097 | #ifdef BCMDBG | |
2098 | /* Message if we hit the limit */ | |
2099 | if (!rxleft) | |
2100 | brcmf_dbg(DATA, "hit rx limit of %d frames\n", | |
2101 | maxframes); | |
2102 | else | |
2103 | #endif /* BCMDBG */ | |
2104 | brcmf_dbg(DATA, "processed %d frames\n", rxcount); | |
2105 | /* Back off rxseq if awaiting rtx, update rx_seq */ | |
2106 | if (bus->rxskip) | |
2107 | rxseq--; | |
2108 | bus->rx_seq = rxseq; | |
2109 | ||
2110 | return rxcount; | |
2111 | } | |
2112 | ||
2113 | static int | |
2114 | brcmf_sdbrcm_send_buf(struct brcmf_bus *bus, u32 addr, uint fn, uint flags, | |
2115 | u8 *buf, uint nbytes, struct sk_buff *pkt) | |
2116 | { | |
2117 | return brcmf_sdcard_send_buf | |
2118 | (bus->sdiodev, addr, fn, flags, buf, nbytes, pkt); | |
2119 | } | |
2120 | ||
2121 | static void | |
2122 | brcmf_sdbrcm_wait_for_event(struct brcmf_bus *bus, bool *lockvar) | |
2123 | { | |
2124 | up(&bus->sdsem); | |
2125 | wait_event_interruptible_timeout(bus->ctrl_wait, | |
2126 | (*lockvar == false), HZ * 2); | |
2127 | down(&bus->sdsem); | |
2128 | return; | |
2129 | } | |
2130 | ||
2131 | static void | |
2132 | brcmf_sdbrcm_wait_event_wakeup(struct brcmf_bus *bus) | |
2133 | { | |
2134 | if (waitqueue_active(&bus->ctrl_wait)) | |
2135 | wake_up_interruptible(&bus->ctrl_wait); | |
2136 | return; | |
2137 | } | |
2138 | ||
2139 | /* Writes a HW/SW header into the packet and sends it. */ | |
2140 | /* Assumes: (a) header space already there, (b) caller holds lock */ | |
2141 | static int brcmf_sdbrcm_txpkt(struct brcmf_bus *bus, struct sk_buff *pkt, | |
2142 | uint chan, bool free_pkt) | |
2143 | { | |
2144 | int ret; | |
2145 | u8 *frame; | |
2146 | u16 len, pad = 0; | |
2147 | u32 swheader; | |
2148 | struct sk_buff *new; | |
2149 | int i; | |
2150 | ||
2151 | brcmf_dbg(TRACE, "Enter\n"); | |
2152 | ||
2153 | frame = (u8 *) (pkt->data); | |
2154 | ||
2155 | /* Add alignment padding, allocate new packet if needed */ | |
2156 | pad = ((unsigned long)frame % BRCMF_SDALIGN); | |
2157 | if (pad) { | |
2158 | if (skb_headroom(pkt) < pad) { | |
2159 | brcmf_dbg(INFO, "insufficient headroom %d for %d pad\n", | |
2160 | skb_headroom(pkt), pad); | |
2161 | bus->drvr->tx_realloc++; | |
2162 | new = brcmu_pkt_buf_get_skb(pkt->len + BRCMF_SDALIGN); | |
2163 | if (!new) { | |
2164 | brcmf_dbg(ERROR, "couldn't allocate new %d-byte packet\n", | |
2165 | pkt->len + BRCMF_SDALIGN); | |
2166 | ret = -ENOMEM; | |
2167 | goto done; | |
2168 | } | |
2169 | ||
2170 | pkt_align(new, pkt->len, BRCMF_SDALIGN); | |
2171 | memcpy(new->data, pkt->data, pkt->len); | |
2172 | if (free_pkt) | |
2173 | brcmu_pkt_buf_free_skb(pkt); | |
2174 | /* free the pkt if canned one is not used */ | |
2175 | free_pkt = true; | |
2176 | pkt = new; | |
2177 | frame = (u8 *) (pkt->data); | |
2178 | /* precondition: (frame % BRCMF_SDALIGN) == 0) */ | |
2179 | pad = 0; | |
2180 | } else { | |
2181 | skb_push(pkt, pad); | |
2182 | frame = (u8 *) (pkt->data); | |
2183 | /* precondition: pad + SDPCM_HDRLEN <= pkt->len */ | |
2184 | memset(frame, 0, pad + SDPCM_HDRLEN); | |
2185 | } | |
2186 | } | |
2187 | /* precondition: pad < BRCMF_SDALIGN */ | |
2188 | ||
2189 | /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */ | |
2190 | len = (u16) (pkt->len); | |
2191 | *(__le16 *) frame = cpu_to_le16(len); | |
2192 | *(((__le16 *) frame) + 1) = cpu_to_le16(~len); | |
2193 | ||
2194 | /* Software tag: channel, sequence number, data offset */ | |
2195 | swheader = | |
2196 | ((chan << SDPCM_CHANNEL_SHIFT) & SDPCM_CHANNEL_MASK) | bus->tx_seq | | |
2197 | (((pad + | |
2198 | SDPCM_HDRLEN) << SDPCM_DOFFSET_SHIFT) & SDPCM_DOFFSET_MASK); | |
2199 | ||
2200 | put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN); | |
2201 | put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader)); | |
2202 | ||
2203 | #ifdef BCMDBG | |
2204 | tx_packets[pkt->priority]++; | |
2205 | if (BRCMF_BYTES_ON() && | |
2206 | (((BRCMF_CTL_ON() && (chan == SDPCM_CONTROL_CHANNEL)) || | |
2207 | (BRCMF_DATA_ON() && (chan != SDPCM_CONTROL_CHANNEL))))) { | |
2208 | printk(KERN_DEBUG "Tx Frame:\n"); | |
2209 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, frame, len); | |
2210 | } else if (BRCMF_HDRS_ON()) { | |
2211 | printk(KERN_DEBUG "TxHdr:\n"); | |
2212 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
2213 | frame, min_t(u16, len, 16)); | |
2214 | } | |
2215 | #endif | |
2216 | ||
2217 | /* Raise len to next SDIO block to eliminate tail command */ | |
2218 | if (bus->roundup && bus->blocksize && (len > bus->blocksize)) { | |
2219 | u16 pad = bus->blocksize - (len % bus->blocksize); | |
2220 | if ((pad <= bus->roundup) && (pad < bus->blocksize)) | |
2221 | len += pad; | |
2222 | } else if (len % BRCMF_SDALIGN) { | |
2223 | len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN); | |
2224 | } | |
2225 | ||
2226 | /* Some controllers have trouble with odd bytes -- round to even */ | |
2227 | if (len & (ALIGNMENT - 1)) | |
2228 | len = roundup(len, ALIGNMENT); | |
2229 | ||
2230 | ret = brcmf_sdbrcm_send_buf(bus, bus->sdiodev->sbwad, | |
2231 | SDIO_FUNC_2, F2SYNC, frame, | |
2232 | len, pkt); | |
2233 | bus->f2txdata++; | |
2234 | ||
2235 | if (ret < 0) { | |
2236 | /* On failure, abort the command and terminate the frame */ | |
2237 | brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n", | |
2238 | ret); | |
2239 | bus->tx_sderrs++; | |
2240 | ||
2241 | brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2); | |
2242 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
2243 | SBSDIO_FUNC1_FRAMECTRL, SFC_WF_TERM, | |
2244 | NULL); | |
2245 | bus->f1regdata++; | |
2246 | ||
2247 | for (i = 0; i < 3; i++) { | |
2248 | u8 hi, lo; | |
2249 | hi = brcmf_sdcard_cfg_read(bus->sdiodev, | |
2250 | SDIO_FUNC_1, | |
2251 | SBSDIO_FUNC1_WFRAMEBCHI, | |
2252 | NULL); | |
2253 | lo = brcmf_sdcard_cfg_read(bus->sdiodev, | |
2254 | SDIO_FUNC_1, | |
2255 | SBSDIO_FUNC1_WFRAMEBCLO, | |
2256 | NULL); | |
2257 | bus->f1regdata += 2; | |
2258 | if ((hi == 0) && (lo == 0)) | |
2259 | break; | |
2260 | } | |
2261 | ||
2262 | } | |
2263 | if (ret == 0) | |
2264 | bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP; | |
2265 | ||
2266 | done: | |
2267 | /* restore pkt buffer pointer before calling tx complete routine */ | |
2268 | skb_pull(pkt, SDPCM_HDRLEN + pad); | |
2269 | up(&bus->sdsem); | |
2270 | brcmf_txcomplete(bus->drvr, pkt, ret != 0); | |
2271 | down(&bus->sdsem); | |
2272 | ||
2273 | if (free_pkt) | |
2274 | brcmu_pkt_buf_free_skb(pkt); | |
2275 | ||
2276 | return ret; | |
2277 | } | |
2278 | ||
2279 | static uint brcmf_sdbrcm_sendfromq(struct brcmf_bus *bus, uint maxframes) | |
2280 | { | |
2281 | struct sk_buff *pkt; | |
2282 | u32 intstatus = 0; | |
2283 | uint retries = 0; | |
2284 | int ret = 0, prec_out; | |
2285 | uint cnt = 0; | |
2286 | uint datalen; | |
2287 | u8 tx_prec_map; | |
2288 | ||
2289 | struct brcmf_pub *drvr = bus->drvr; | |
2290 | ||
2291 | brcmf_dbg(TRACE, "Enter\n"); | |
2292 | ||
2293 | tx_prec_map = ~bus->flowcontrol; | |
2294 | ||
2295 | /* Send frames until the limit or some other event */ | |
2296 | for (cnt = 0; (cnt < maxframes) && data_ok(bus); cnt++) { | |
2297 | spin_lock_bh(&bus->txqlock); | |
2298 | pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map, &prec_out); | |
2299 | if (pkt == NULL) { | |
2300 | spin_unlock_bh(&bus->txqlock); | |
2301 | break; | |
2302 | } | |
2303 | spin_unlock_bh(&bus->txqlock); | |
2304 | datalen = pkt->len - SDPCM_HDRLEN; | |
2305 | ||
2306 | ret = brcmf_sdbrcm_txpkt(bus, pkt, SDPCM_DATA_CHANNEL, true); | |
2307 | if (ret) | |
2308 | bus->drvr->tx_errors++; | |
2309 | else | |
2310 | bus->drvr->dstats.tx_bytes += datalen; | |
2311 | ||
2312 | /* In poll mode, need to check for other events */ | |
2313 | if (!bus->intr && cnt) { | |
2314 | /* Check device status, signal pending interrupt */ | |
2315 | r_sdreg32(bus, &intstatus, | |
2316 | offsetof(struct sdpcmd_regs, intstatus), | |
2317 | &retries); | |
2318 | bus->f2txdata++; | |
2319 | if (brcmf_sdcard_regfail(bus->sdiodev)) | |
2320 | break; | |
2321 | if (intstatus & bus->hostintmask) | |
2322 | bus->ipend = true; | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | /* Deflow-control stack if needed */ | |
2327 | if (drvr->up && (drvr->busstate == BRCMF_BUS_DATA) && | |
2328 | drvr->txoff && (pktq_len(&bus->txq) < TXLOW)) | |
2329 | brcmf_txflowcontrol(drvr, 0, OFF); | |
2330 | ||
2331 | return cnt; | |
2332 | } | |
2333 | ||
2334 | static bool brcmf_sdbrcm_dpc(struct brcmf_bus *bus) | |
2335 | { | |
2336 | u32 intstatus, newstatus = 0; | |
2337 | uint retries = 0; | |
2338 | uint rxlimit = bus->rxbound; /* Rx frames to read before resched */ | |
2339 | uint txlimit = bus->txbound; /* Tx frames to send before resched */ | |
2340 | uint framecnt = 0; /* Temporary counter of tx/rx frames */ | |
2341 | bool rxdone = true; /* Flag for no more read data */ | |
2342 | bool resched = false; /* Flag indicating resched wanted */ | |
2343 | ||
2344 | brcmf_dbg(TRACE, "Enter\n"); | |
2345 | ||
2346 | /* Start with leftover status bits */ | |
2347 | intstatus = bus->intstatus; | |
2348 | ||
2349 | down(&bus->sdsem); | |
2350 | ||
2351 | /* If waiting for HTAVAIL, check status */ | |
2352 | if (bus->clkstate == CLK_PENDING) { | |
2353 | int err; | |
2354 | u8 clkctl, devctl = 0; | |
2355 | ||
2356 | #ifdef BCMDBG | |
2357 | /* Check for inconsistent device control */ | |
2358 | devctl = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
2359 | SBSDIO_DEVICE_CTL, &err); | |
2360 | if (err) { | |
2361 | brcmf_dbg(ERROR, "error reading DEVCTL: %d\n", err); | |
2362 | bus->drvr->busstate = BRCMF_BUS_DOWN; | |
2363 | } | |
2364 | #endif /* BCMDBG */ | |
2365 | ||
2366 | /* Read CSR, if clock on switch to AVAIL, else ignore */ | |
2367 | clkctl = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
2368 | SBSDIO_FUNC1_CHIPCLKCSR, &err); | |
2369 | if (err) { | |
2370 | brcmf_dbg(ERROR, "error reading CSR: %d\n", | |
2371 | err); | |
2372 | bus->drvr->busstate = BRCMF_BUS_DOWN; | |
2373 | } | |
2374 | ||
2375 | brcmf_dbg(INFO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n", | |
2376 | devctl, clkctl); | |
2377 | ||
2378 | if (SBSDIO_HTAV(clkctl)) { | |
2379 | devctl = brcmf_sdcard_cfg_read(bus->sdiodev, | |
2380 | SDIO_FUNC_1, | |
2381 | SBSDIO_DEVICE_CTL, &err); | |
2382 | if (err) { | |
2383 | brcmf_dbg(ERROR, "error reading DEVCTL: %d\n", | |
2384 | err); | |
2385 | bus->drvr->busstate = BRCMF_BUS_DOWN; | |
2386 | } | |
2387 | devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY; | |
2388 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
2389 | SBSDIO_DEVICE_CTL, devctl, &err); | |
2390 | if (err) { | |
2391 | brcmf_dbg(ERROR, "error writing DEVCTL: %d\n", | |
2392 | err); | |
2393 | bus->drvr->busstate = BRCMF_BUS_DOWN; | |
2394 | } | |
2395 | bus->clkstate = CLK_AVAIL; | |
2396 | } else { | |
2397 | goto clkwait; | |
2398 | } | |
2399 | } | |
2400 | ||
2401 | bus_wake(bus); | |
2402 | ||
2403 | /* Make sure backplane clock is on */ | |
2404 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, true); | |
2405 | if (bus->clkstate == CLK_PENDING) | |
2406 | goto clkwait; | |
2407 | ||
2408 | /* Pending interrupt indicates new device status */ | |
2409 | if (bus->ipend) { | |
2410 | bus->ipend = false; | |
2411 | r_sdreg32(bus, &newstatus, | |
2412 | offsetof(struct sdpcmd_regs, intstatus), &retries); | |
2413 | bus->f1regdata++; | |
2414 | if (brcmf_sdcard_regfail(bus->sdiodev)) | |
2415 | newstatus = 0; | |
2416 | newstatus &= bus->hostintmask; | |
2417 | bus->fcstate = !!(newstatus & I_HMB_FC_STATE); | |
2418 | if (newstatus) { | |
2419 | w_sdreg32(bus, newstatus, | |
2420 | offsetof(struct sdpcmd_regs, intstatus), | |
2421 | &retries); | |
2422 | bus->f1regdata++; | |
2423 | } | |
2424 | } | |
2425 | ||
2426 | /* Merge new bits with previous */ | |
2427 | intstatus |= newstatus; | |
2428 | bus->intstatus = 0; | |
2429 | ||
2430 | /* Handle flow-control change: read new state in case our ack | |
2431 | * crossed another change interrupt. If change still set, assume | |
2432 | * FC ON for safety, let next loop through do the debounce. | |
2433 | */ | |
2434 | if (intstatus & I_HMB_FC_CHANGE) { | |
2435 | intstatus &= ~I_HMB_FC_CHANGE; | |
2436 | w_sdreg32(bus, I_HMB_FC_CHANGE, | |
2437 | offsetof(struct sdpcmd_regs, intstatus), &retries); | |
2438 | ||
2439 | r_sdreg32(bus, &newstatus, | |
2440 | offsetof(struct sdpcmd_regs, intstatus), &retries); | |
2441 | bus->f1regdata += 2; | |
2442 | bus->fcstate = | |
2443 | !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)); | |
2444 | intstatus |= (newstatus & bus->hostintmask); | |
2445 | } | |
2446 | ||
2447 | /* Handle host mailbox indication */ | |
2448 | if (intstatus & I_HMB_HOST_INT) { | |
2449 | intstatus &= ~I_HMB_HOST_INT; | |
2450 | intstatus |= brcmf_sdbrcm_hostmail(bus); | |
2451 | } | |
2452 | ||
2453 | /* Generally don't ask for these, can get CRC errors... */ | |
2454 | if (intstatus & I_WR_OOSYNC) { | |
2455 | brcmf_dbg(ERROR, "Dongle reports WR_OOSYNC\n"); | |
2456 | intstatus &= ~I_WR_OOSYNC; | |
2457 | } | |
2458 | ||
2459 | if (intstatus & I_RD_OOSYNC) { | |
2460 | brcmf_dbg(ERROR, "Dongle reports RD_OOSYNC\n"); | |
2461 | intstatus &= ~I_RD_OOSYNC; | |
2462 | } | |
2463 | ||
2464 | if (intstatus & I_SBINT) { | |
2465 | brcmf_dbg(ERROR, "Dongle reports SBINT\n"); | |
2466 | intstatus &= ~I_SBINT; | |
2467 | } | |
2468 | ||
2469 | /* Would be active due to wake-wlan in gSPI */ | |
2470 | if (intstatus & I_CHIPACTIVE) { | |
2471 | brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n"); | |
2472 | intstatus &= ~I_CHIPACTIVE; | |
2473 | } | |
2474 | ||
2475 | /* Ignore frame indications if rxskip is set */ | |
2476 | if (bus->rxskip) | |
2477 | intstatus &= ~I_HMB_FRAME_IND; | |
2478 | ||
2479 | /* On frame indication, read available frames */ | |
2480 | if (PKT_AVAILABLE()) { | |
2481 | framecnt = brcmf_sdbrcm_readframes(bus, rxlimit, &rxdone); | |
2482 | if (rxdone || bus->rxskip) | |
2483 | intstatus &= ~I_HMB_FRAME_IND; | |
2484 | rxlimit -= min(framecnt, rxlimit); | |
2485 | } | |
2486 | ||
2487 | /* Keep still-pending events for next scheduling */ | |
2488 | bus->intstatus = intstatus; | |
2489 | ||
2490 | clkwait: | |
2491 | if (data_ok(bus) && bus->ctrl_frame_stat && | |
2492 | (bus->clkstate == CLK_AVAIL)) { | |
2493 | int ret, i; | |
2494 | ||
2495 | ret = brcmf_sdbrcm_send_buf(bus, bus->sdiodev->sbwad, | |
2496 | SDIO_FUNC_2, F2SYNC, (u8 *) bus->ctrl_frame_buf, | |
2497 | (u32) bus->ctrl_frame_len, NULL); | |
2498 | ||
2499 | if (ret < 0) { | |
2500 | /* On failure, abort the command and | |
2501 | terminate the frame */ | |
2502 | brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n", | |
2503 | ret); | |
2504 | bus->tx_sderrs++; | |
2505 | ||
2506 | brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2); | |
2507 | ||
2508 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
2509 | SBSDIO_FUNC1_FRAMECTRL, SFC_WF_TERM, | |
2510 | NULL); | |
2511 | bus->f1regdata++; | |
2512 | ||
2513 | for (i = 0; i < 3; i++) { | |
2514 | u8 hi, lo; | |
2515 | hi = brcmf_sdcard_cfg_read(bus->sdiodev, | |
2516 | SDIO_FUNC_1, | |
2517 | SBSDIO_FUNC1_WFRAMEBCHI, | |
2518 | NULL); | |
2519 | lo = brcmf_sdcard_cfg_read(bus->sdiodev, | |
2520 | SDIO_FUNC_1, | |
2521 | SBSDIO_FUNC1_WFRAMEBCLO, | |
2522 | NULL); | |
2523 | bus->f1regdata += 2; | |
2524 | if ((hi == 0) && (lo == 0)) | |
2525 | break; | |
2526 | } | |
2527 | ||
2528 | } | |
2529 | if (ret == 0) | |
2530 | bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP; | |
2531 | ||
2532 | brcmf_dbg(INFO, "Return_dpc value is : %d\n", ret); | |
2533 | bus->ctrl_frame_stat = false; | |
2534 | brcmf_sdbrcm_wait_event_wakeup(bus); | |
2535 | } | |
2536 | /* Send queued frames (limit 1 if rx may still be pending) */ | |
2537 | else if ((bus->clkstate == CLK_AVAIL) && !bus->fcstate && | |
2538 | brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit | |
2539 | && data_ok(bus)) { | |
2540 | framecnt = rxdone ? txlimit : min(txlimit, bus->txminmax); | |
2541 | framecnt = brcmf_sdbrcm_sendfromq(bus, framecnt); | |
2542 | txlimit -= framecnt; | |
2543 | } | |
2544 | ||
2545 | /* Resched if events or tx frames are pending, | |
2546 | else await next interrupt */ | |
2547 | /* On failed register access, all bets are off: | |
2548 | no resched or interrupts */ | |
2549 | if ((bus->drvr->busstate == BRCMF_BUS_DOWN) || | |
2550 | brcmf_sdcard_regfail(bus->sdiodev)) { | |
2551 | brcmf_dbg(ERROR, "failed backplane access over SDIO, halting operation %d\n", | |
2552 | brcmf_sdcard_regfail(bus->sdiodev)); | |
2553 | bus->drvr->busstate = BRCMF_BUS_DOWN; | |
2554 | bus->intstatus = 0; | |
2555 | } else if (bus->clkstate == CLK_PENDING) { | |
2556 | brcmf_dbg(INFO, "rescheduled due to CLK_PENDING awaiting I_CHIPACTIVE interrupt\n"); | |
2557 | resched = true; | |
2558 | } else if (bus->intstatus || bus->ipend || | |
2559 | (!bus->fcstate && brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) | |
2560 | && data_ok(bus)) || PKT_AVAILABLE()) { | |
2561 | resched = true; | |
2562 | } | |
2563 | ||
2564 | bus->dpc_sched = resched; | |
2565 | ||
2566 | /* If we're done for now, turn off clock request. */ | |
2567 | if ((bus->clkstate != CLK_PENDING) | |
2568 | && bus->idletime == BRCMF_IDLE_IMMEDIATE) { | |
2569 | bus->activity = false; | |
2570 | brcmf_sdbrcm_clkctl(bus, CLK_NONE, false); | |
2571 | } | |
2572 | ||
2573 | up(&bus->sdsem); | |
2574 | ||
2575 | return resched; | |
2576 | } | |
2577 | ||
2578 | static int brcmf_sdbrcm_dpc_thread(void *data) | |
2579 | { | |
2580 | struct brcmf_bus *bus = (struct brcmf_bus *) data; | |
2581 | ||
2582 | allow_signal(SIGTERM); | |
2583 | /* Run until signal received */ | |
2584 | while (1) { | |
2585 | if (kthread_should_stop()) | |
2586 | break; | |
2587 | if (!wait_for_completion_interruptible(&bus->dpc_wait)) { | |
2588 | /* Call bus dpc unless it indicated down | |
2589 | (then clean stop) */ | |
2590 | if (bus->drvr->busstate != BRCMF_BUS_DOWN) { | |
2591 | if (brcmf_sdbrcm_dpc(bus)) | |
2592 | complete(&bus->dpc_wait); | |
2593 | } else { | |
2594 | /* after stopping the bus, exit thread */ | |
2595 | brcmf_sdbrcm_bus_stop(bus); | |
2596 | bus->dpc_tsk = NULL; | |
2597 | break; | |
2598 | } | |
2599 | } else | |
2600 | break; | |
2601 | } | |
2602 | return 0; | |
2603 | } | |
2604 | ||
2605 | int brcmf_sdbrcm_bus_txdata(struct brcmf_bus *bus, struct sk_buff *pkt) | |
2606 | { | |
2607 | int ret = -EBADE; | |
2608 | uint datalen, prec; | |
2609 | ||
2610 | brcmf_dbg(TRACE, "Enter\n"); | |
2611 | ||
2612 | datalen = pkt->len; | |
2613 | ||
2614 | /* Add space for the header */ | |
2615 | skb_push(pkt, SDPCM_HDRLEN); | |
2616 | /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */ | |
2617 | ||
2618 | prec = prio2prec((pkt->priority & PRIOMASK)); | |
2619 | ||
2620 | /* Check for existing queue, current flow-control, | |
2621 | pending event, or pending clock */ | |
2622 | brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq)); | |
2623 | bus->fcqueued++; | |
2624 | ||
2625 | /* Priority based enq */ | |
2626 | spin_lock_bh(&bus->txqlock); | |
2627 | if (brcmf_c_prec_enq(bus->drvr, &bus->txq, pkt, prec) == false) { | |
2628 | skb_pull(pkt, SDPCM_HDRLEN); | |
2629 | brcmf_txcomplete(bus->drvr, pkt, false); | |
2630 | brcmu_pkt_buf_free_skb(pkt); | |
2631 | brcmf_dbg(ERROR, "out of bus->txq !!!\n"); | |
2632 | ret = -ENOSR; | |
2633 | } else { | |
2634 | ret = 0; | |
2635 | } | |
2636 | spin_unlock_bh(&bus->txqlock); | |
2637 | ||
2638 | if (pktq_len(&bus->txq) >= TXHI) | |
2639 | brcmf_txflowcontrol(bus->drvr, 0, ON); | |
2640 | ||
2641 | #ifdef BCMDBG | |
2642 | if (pktq_plen(&bus->txq, prec) > qcount[prec]) | |
2643 | qcount[prec] = pktq_plen(&bus->txq, prec); | |
2644 | #endif | |
2645 | /* Schedule DPC if needed to send queued packet(s) */ | |
2646 | if (!bus->dpc_sched) { | |
2647 | bus->dpc_sched = true; | |
2648 | if (bus->dpc_tsk) | |
2649 | complete(&bus->dpc_wait); | |
2650 | } | |
2651 | ||
2652 | return ret; | |
2653 | } | |
2654 | ||
2655 | static int | |
2656 | brcmf_sdbrcm_membytes(struct brcmf_bus *bus, bool write, u32 address, u8 *data, | |
2657 | uint size) | |
2658 | { | |
2659 | int bcmerror = 0; | |
2660 | u32 sdaddr; | |
2661 | uint dsize; | |
2662 | ||
2663 | /* Determine initial transfer parameters */ | |
2664 | sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK; | |
2665 | if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK) | |
2666 | dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr); | |
2667 | else | |
2668 | dsize = size; | |
2669 | ||
2670 | /* Set the backplane window to include the start address */ | |
2671 | bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev, address); | |
2672 | if (bcmerror) { | |
2673 | brcmf_dbg(ERROR, "window change failed\n"); | |
2674 | goto xfer_done; | |
2675 | } | |
2676 | ||
2677 | /* Do the transfer(s) */ | |
2678 | while (size) { | |
2679 | brcmf_dbg(INFO, "%s %d bytes at offset 0x%08x in window 0x%08x\n", | |
2680 | write ? "write" : "read", dsize, | |
2681 | sdaddr, address & SBSDIO_SBWINDOW_MASK); | |
2682 | bcmerror = brcmf_sdcard_rwdata(bus->sdiodev, write, | |
2683 | sdaddr, data, dsize); | |
2684 | if (bcmerror) { | |
2685 | brcmf_dbg(ERROR, "membytes transfer failed\n"); | |
2686 | break; | |
2687 | } | |
2688 | ||
2689 | /* Adjust for next transfer (if any) */ | |
2690 | size -= dsize; | |
2691 | if (size) { | |
2692 | data += dsize; | |
2693 | address += dsize; | |
2694 | bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev, | |
2695 | address); | |
2696 | if (bcmerror) { | |
2697 | brcmf_dbg(ERROR, "window change failed\n"); | |
2698 | break; | |
2699 | } | |
2700 | sdaddr = 0; | |
2701 | dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size); | |
2702 | } | |
2703 | } | |
2704 | ||
2705 | xfer_done: | |
2706 | /* Return the window to backplane enumeration space for core access */ | |
2707 | if (brcmf_sdcard_set_sbaddr_window(bus->sdiodev, bus->sdiodev->sbwad)) | |
2708 | brcmf_dbg(ERROR, "FAILED to set window back to 0x%x\n", | |
2709 | bus->sdiodev->sbwad); | |
2710 | ||
2711 | return bcmerror; | |
2712 | } | |
2713 | ||
2714 | #ifdef BCMDBG | |
2715 | #define CONSOLE_LINE_MAX 192 | |
2716 | ||
2717 | static int brcmf_sdbrcm_readconsole(struct brcmf_bus *bus) | |
2718 | { | |
2719 | struct brcmf_console *c = &bus->console; | |
2720 | u8 line[CONSOLE_LINE_MAX], ch; | |
2721 | u32 n, idx, addr; | |
2722 | int rv; | |
2723 | ||
2724 | /* Don't do anything until FWREADY updates console address */ | |
2725 | if (bus->console_addr == 0) | |
2726 | return 0; | |
2727 | ||
2728 | /* Read console log struct */ | |
2729 | addr = bus->console_addr + offsetof(struct rte_console, log_le); | |
2730 | rv = brcmf_sdbrcm_membytes(bus, false, addr, (u8 *)&c->log_le, | |
2731 | sizeof(c->log_le)); | |
2732 | if (rv < 0) | |
2733 | return rv; | |
2734 | ||
2735 | /* Allocate console buffer (one time only) */ | |
2736 | if (c->buf == NULL) { | |
2737 | c->bufsize = le32_to_cpu(c->log_le.buf_size); | |
2738 | c->buf = kmalloc(c->bufsize, GFP_ATOMIC); | |
2739 | if (c->buf == NULL) | |
2740 | return -ENOMEM; | |
2741 | } | |
2742 | ||
2743 | idx = le32_to_cpu(c->log_le.idx); | |
2744 | ||
2745 | /* Protect against corrupt value */ | |
2746 | if (idx > c->bufsize) | |
2747 | return -EBADE; | |
2748 | ||
2749 | /* Skip reading the console buffer if the index pointer | |
2750 | has not moved */ | |
2751 | if (idx == c->last) | |
2752 | return 0; | |
2753 | ||
2754 | /* Read the console buffer */ | |
2755 | addr = le32_to_cpu(c->log_le.buf); | |
2756 | rv = brcmf_sdbrcm_membytes(bus, false, addr, c->buf, c->bufsize); | |
2757 | if (rv < 0) | |
2758 | return rv; | |
2759 | ||
2760 | while (c->last != idx) { | |
2761 | for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) { | |
2762 | if (c->last == idx) { | |
2763 | /* This would output a partial line. | |
2764 | * Instead, back up | |
2765 | * the buffer pointer and output this | |
2766 | * line next time around. | |
2767 | */ | |
2768 | if (c->last >= n) | |
2769 | c->last -= n; | |
2770 | else | |
2771 | c->last = c->bufsize - n; | |
2772 | goto break2; | |
2773 | } | |
2774 | ch = c->buf[c->last]; | |
2775 | c->last = (c->last + 1) % c->bufsize; | |
2776 | if (ch == '\n') | |
2777 | break; | |
2778 | line[n] = ch; | |
2779 | } | |
2780 | ||
2781 | if (n > 0) { | |
2782 | if (line[n - 1] == '\r') | |
2783 | n--; | |
2784 | line[n] = 0; | |
2785 | printk(KERN_DEBUG "CONSOLE: %s\n", line); | |
2786 | } | |
2787 | } | |
2788 | break2: | |
2789 | ||
2790 | return 0; | |
2791 | } | |
2792 | #endif /* BCMDBG */ | |
2793 | ||
2794 | static int brcmf_tx_frame(struct brcmf_bus *bus, u8 *frame, u16 len) | |
2795 | { | |
2796 | int i; | |
2797 | int ret; | |
2798 | ||
2799 | bus->ctrl_frame_stat = false; | |
2800 | ret = brcmf_sdbrcm_send_buf(bus, bus->sdiodev->sbwad, | |
2801 | SDIO_FUNC_2, F2SYNC, frame, len, NULL); | |
2802 | ||
2803 | if (ret < 0) { | |
2804 | /* On failure, abort the command and terminate the frame */ | |
2805 | brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n", | |
2806 | ret); | |
2807 | bus->tx_sderrs++; | |
2808 | ||
2809 | brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2); | |
2810 | ||
2811 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
2812 | SBSDIO_FUNC1_FRAMECTRL, | |
2813 | SFC_WF_TERM, NULL); | |
2814 | bus->f1regdata++; | |
2815 | ||
2816 | for (i = 0; i < 3; i++) { | |
2817 | u8 hi, lo; | |
2818 | hi = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
2819 | SBSDIO_FUNC1_WFRAMEBCHI, | |
2820 | NULL); | |
2821 | lo = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
2822 | SBSDIO_FUNC1_WFRAMEBCLO, | |
2823 | NULL); | |
2824 | bus->f1regdata += 2; | |
2825 | if (hi == 0 && lo == 0) | |
2826 | break; | |
2827 | } | |
2828 | return ret; | |
2829 | } | |
2830 | ||
2831 | bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP; | |
2832 | ||
2833 | return ret; | |
2834 | } | |
2835 | ||
2836 | int | |
2837 | brcmf_sdbrcm_bus_txctl(struct brcmf_bus *bus, unsigned char *msg, uint msglen) | |
2838 | { | |
2839 | u8 *frame; | |
2840 | u16 len; | |
2841 | u32 swheader; | |
2842 | uint retries = 0; | |
2843 | u8 doff = 0; | |
2844 | int ret = -1; | |
2845 | ||
2846 | brcmf_dbg(TRACE, "Enter\n"); | |
2847 | ||
2848 | /* Back the pointer to make a room for bus header */ | |
2849 | frame = msg - SDPCM_HDRLEN; | |
2850 | len = (msglen += SDPCM_HDRLEN); | |
2851 | ||
2852 | /* Add alignment padding (optional for ctl frames) */ | |
2853 | doff = ((unsigned long)frame % BRCMF_SDALIGN); | |
2854 | if (doff) { | |
2855 | frame -= doff; | |
2856 | len += doff; | |
2857 | msglen += doff; | |
2858 | memset(frame, 0, doff + SDPCM_HDRLEN); | |
2859 | } | |
2860 | /* precondition: doff < BRCMF_SDALIGN */ | |
2861 | doff += SDPCM_HDRLEN; | |
2862 | ||
2863 | /* Round send length to next SDIO block */ | |
2864 | if (bus->roundup && bus->blocksize && (len > bus->blocksize)) { | |
2865 | u16 pad = bus->blocksize - (len % bus->blocksize); | |
2866 | if ((pad <= bus->roundup) && (pad < bus->blocksize)) | |
2867 | len += pad; | |
2868 | } else if (len % BRCMF_SDALIGN) { | |
2869 | len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN); | |
2870 | } | |
2871 | ||
2872 | /* Satisfy length-alignment requirements */ | |
2873 | if (len & (ALIGNMENT - 1)) | |
2874 | len = roundup(len, ALIGNMENT); | |
2875 | ||
2876 | /* precondition: IS_ALIGNED((unsigned long)frame, 2) */ | |
2877 | ||
2878 | /* Need to lock here to protect txseq and SDIO tx calls */ | |
2879 | down(&bus->sdsem); | |
2880 | ||
2881 | bus_wake(bus); | |
2882 | ||
2883 | /* Make sure backplane clock is on */ | |
2884 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); | |
2885 | ||
2886 | /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */ | |
2887 | *(__le16 *) frame = cpu_to_le16((u16) msglen); | |
2888 | *(((__le16 *) frame) + 1) = cpu_to_le16(~msglen); | |
2889 | ||
2890 | /* Software tag: channel, sequence number, data offset */ | |
2891 | swheader = | |
2892 | ((SDPCM_CONTROL_CHANNEL << SDPCM_CHANNEL_SHIFT) & | |
2893 | SDPCM_CHANNEL_MASK) | |
2894 | | bus->tx_seq | ((doff << SDPCM_DOFFSET_SHIFT) & | |
2895 | SDPCM_DOFFSET_MASK); | |
2896 | put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN); | |
2897 | put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader)); | |
2898 | ||
2899 | if (!data_ok(bus)) { | |
2900 | brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n", | |
2901 | bus->tx_max, bus->tx_seq); | |
2902 | bus->ctrl_frame_stat = true; | |
2903 | /* Send from dpc */ | |
2904 | bus->ctrl_frame_buf = frame; | |
2905 | bus->ctrl_frame_len = len; | |
2906 | ||
2907 | brcmf_sdbrcm_wait_for_event(bus, &bus->ctrl_frame_stat); | |
2908 | ||
2909 | if (bus->ctrl_frame_stat == false) { | |
2910 | brcmf_dbg(INFO, "ctrl_frame_stat == false\n"); | |
2911 | ret = 0; | |
2912 | } else { | |
2913 | brcmf_dbg(INFO, "ctrl_frame_stat == true\n"); | |
2914 | ret = -1; | |
2915 | } | |
2916 | } | |
2917 | ||
2918 | if (ret == -1) { | |
2919 | #ifdef BCMDBG | |
2920 | if (BRCMF_BYTES_ON() && BRCMF_CTL_ON()) { | |
2921 | printk(KERN_DEBUG "Tx Frame:\n"); | |
2922 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
2923 | frame, len); | |
2924 | } else if (BRCMF_HDRS_ON()) { | |
2925 | printk(KERN_DEBUG "TxHdr:\n"); | |
2926 | print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, | |
2927 | frame, min_t(u16, len, 16)); | |
2928 | } | |
2929 | #endif | |
2930 | ||
2931 | do { | |
2932 | ret = brcmf_tx_frame(bus, frame, len); | |
2933 | } while (ret < 0 && retries++ < TXRETRIES); | |
2934 | } | |
2935 | ||
2936 | if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) && !bus->dpc_sched) { | |
2937 | bus->activity = false; | |
2938 | brcmf_sdbrcm_clkctl(bus, CLK_NONE, true); | |
2939 | } | |
2940 | ||
2941 | up(&bus->sdsem); | |
2942 | ||
2943 | if (ret) | |
2944 | bus->drvr->tx_ctlerrs++; | |
2945 | else | |
2946 | bus->drvr->tx_ctlpkts++; | |
2947 | ||
2948 | return ret ? -EIO : 0; | |
2949 | } | |
2950 | ||
2951 | int | |
2952 | brcmf_sdbrcm_bus_rxctl(struct brcmf_bus *bus, unsigned char *msg, uint msglen) | |
2953 | { | |
2954 | int timeleft; | |
2955 | uint rxlen = 0; | |
2956 | bool pending; | |
2957 | ||
2958 | brcmf_dbg(TRACE, "Enter\n"); | |
2959 | ||
2960 | /* Wait until control frame is available */ | |
2961 | timeleft = brcmf_sdbrcm_dcmd_resp_wait(bus, &bus->rxlen, &pending); | |
2962 | ||
2963 | down(&bus->sdsem); | |
2964 | rxlen = bus->rxlen; | |
2965 | memcpy(msg, bus->rxctl, min(msglen, rxlen)); | |
2966 | bus->rxlen = 0; | |
2967 | up(&bus->sdsem); | |
2968 | ||
2969 | if (rxlen) { | |
2970 | brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n", | |
2971 | rxlen, msglen); | |
2972 | } else if (timeleft == 0) { | |
2973 | brcmf_dbg(ERROR, "resumed on timeout\n"); | |
2974 | } else if (pending == true) { | |
2975 | brcmf_dbg(CTL, "cancelled\n"); | |
2976 | return -ERESTARTSYS; | |
2977 | } else { | |
2978 | brcmf_dbg(CTL, "resumed for unknown reason?\n"); | |
2979 | } | |
2980 | ||
2981 | if (rxlen) | |
2982 | bus->drvr->rx_ctlpkts++; | |
2983 | else | |
2984 | bus->drvr->rx_ctlerrs++; | |
2985 | ||
2986 | return rxlen ? (int)rxlen : -ETIMEDOUT; | |
2987 | } | |
2988 | ||
2989 | static int brcmf_sdbrcm_downloadvars(struct brcmf_bus *bus, void *arg, int len) | |
2990 | { | |
2991 | int bcmerror = 0; | |
2992 | ||
2993 | brcmf_dbg(TRACE, "Enter\n"); | |
2994 | ||
2995 | /* Basic sanity checks */ | |
2996 | if (bus->drvr->up) { | |
2997 | bcmerror = -EISCONN; | |
2998 | goto err; | |
2999 | } | |
3000 | if (!len) { | |
3001 | bcmerror = -EOVERFLOW; | |
3002 | goto err; | |
3003 | } | |
3004 | ||
3005 | /* Free the old ones and replace with passed variables */ | |
3006 | kfree(bus->vars); | |
3007 | ||
3008 | bus->vars = kmalloc(len, GFP_ATOMIC); | |
3009 | bus->varsz = bus->vars ? len : 0; | |
3010 | if (bus->vars == NULL) { | |
3011 | bcmerror = -ENOMEM; | |
3012 | goto err; | |
3013 | } | |
3014 | ||
3015 | /* Copy the passed variables, which should include the | |
3016 | terminating double-null */ | |
3017 | memcpy(bus->vars, arg, bus->varsz); | |
3018 | err: | |
3019 | return bcmerror; | |
3020 | } | |
3021 | ||
3022 | static int brcmf_sdbrcm_write_vars(struct brcmf_bus *bus) | |
3023 | { | |
3024 | int bcmerror = 0; | |
3025 | u32 varsize; | |
3026 | u32 varaddr; | |
3027 | u8 *vbuffer; | |
3028 | u32 varsizew; | |
3029 | __le32 varsizew_le; | |
3030 | #ifdef BCMDBG | |
3031 | char *nvram_ularray; | |
3032 | #endif /* BCMDBG */ | |
3033 | ||
3034 | /* Even if there are no vars are to be written, we still | |
3035 | need to set the ramsize. */ | |
3036 | varsize = bus->varsz ? roundup(bus->varsz, 4) : 0; | |
3037 | varaddr = (bus->ramsize - 4) - varsize; | |
3038 | ||
3039 | if (bus->vars) { | |
3040 | vbuffer = kzalloc(varsize, GFP_ATOMIC); | |
3041 | if (!vbuffer) | |
3042 | return -ENOMEM; | |
3043 | ||
3044 | memcpy(vbuffer, bus->vars, bus->varsz); | |
3045 | ||
3046 | /* Write the vars list */ | |
3047 | bcmerror = | |
3048 | brcmf_sdbrcm_membytes(bus, true, varaddr, vbuffer, varsize); | |
3049 | #ifdef BCMDBG | |
3050 | /* Verify NVRAM bytes */ | |
3051 | brcmf_dbg(INFO, "Compare NVRAM dl & ul; varsize=%d\n", varsize); | |
3052 | nvram_ularray = kmalloc(varsize, GFP_ATOMIC); | |
3053 | if (!nvram_ularray) | |
3054 | return -ENOMEM; | |
3055 | ||
3056 | /* Upload image to verify downloaded contents. */ | |
3057 | memset(nvram_ularray, 0xaa, varsize); | |
3058 | ||
3059 | /* Read the vars list to temp buffer for comparison */ | |
3060 | bcmerror = | |
3061 | brcmf_sdbrcm_membytes(bus, false, varaddr, nvram_ularray, | |
3062 | varsize); | |
3063 | if (bcmerror) { | |
3064 | brcmf_dbg(ERROR, "error %d on reading %d nvram bytes at 0x%08x\n", | |
3065 | bcmerror, varsize, varaddr); | |
3066 | } | |
3067 | /* Compare the org NVRAM with the one read from RAM */ | |
3068 | if (memcmp(vbuffer, nvram_ularray, varsize)) | |
3069 | brcmf_dbg(ERROR, "Downloaded NVRAM image is corrupted\n"); | |
3070 | else | |
3071 | brcmf_dbg(ERROR, "Download/Upload/Compare of NVRAM ok\n"); | |
3072 | ||
3073 | kfree(nvram_ularray); | |
3074 | #endif /* BCMDBG */ | |
3075 | ||
3076 | kfree(vbuffer); | |
3077 | } | |
3078 | ||
3079 | /* adjust to the user specified RAM */ | |
3080 | brcmf_dbg(INFO, "Physical memory size: %d\n", bus->ramsize); | |
3081 | brcmf_dbg(INFO, "Vars are at %d, orig varsize is %d\n", | |
3082 | varaddr, varsize); | |
3083 | varsize = ((bus->ramsize - 4) - varaddr); | |
3084 | ||
3085 | /* | |
3086 | * Determine the length token: | |
3087 | * Varsize, converted to words, in lower 16-bits, checksum | |
3088 | * in upper 16-bits. | |
3089 | */ | |
3090 | if (bcmerror) { | |
3091 | varsizew = 0; | |
3092 | varsizew_le = cpu_to_le32(0); | |
3093 | } else { | |
3094 | varsizew = varsize / 4; | |
3095 | varsizew = (~varsizew << 16) | (varsizew & 0x0000FFFF); | |
3096 | varsizew_le = cpu_to_le32(varsizew); | |
3097 | } | |
3098 | ||
3099 | brcmf_dbg(INFO, "New varsize is %d, length token=0x%08x\n", | |
3100 | varsize, varsizew); | |
3101 | ||
3102 | /* Write the length token to the last word */ | |
3103 | bcmerror = brcmf_sdbrcm_membytes(bus, true, (bus->ramsize - 4), | |
3104 | (u8 *)&varsizew_le, 4); | |
3105 | ||
3106 | return bcmerror; | |
3107 | } | |
3108 | ||
5b435de0 AS |
3109 | static int brcmf_sdbrcm_download_state(struct brcmf_bus *bus, bool enter) |
3110 | { | |
3111 | uint retries; | |
5b435de0 | 3112 | int bcmerror = 0; |
99ba15cd | 3113 | struct chip_info *ci = bus->ci; |
5b435de0 AS |
3114 | |
3115 | /* To enter download state, disable ARM and reset SOCRAM. | |
3116 | * To exit download state, simply reset ARM (default is RAM boot). | |
3117 | */ | |
3118 | if (enter) { | |
3119 | bus->alp_only = true; | |
3120 | ||
086a2e0a | 3121 | ci->coredisable(bus->sdiodev, ci, BCMA_CORE_ARM_CM3); |
5b435de0 | 3122 | |
d77e70ff | 3123 | ci->resetcore(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM); |
5b435de0 AS |
3124 | |
3125 | /* Clear the top bit of memory */ | |
3126 | if (bus->ramsize) { | |
3127 | u32 zeros = 0; | |
3128 | brcmf_sdbrcm_membytes(bus, true, bus->ramsize - 4, | |
3129 | (u8 *)&zeros, 4); | |
3130 | } | |
3131 | } else { | |
6ca687d9 | 3132 | if (!ci->iscoreup(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM)) { |
5b435de0 AS |
3133 | brcmf_dbg(ERROR, "SOCRAM core is down after reset?\n"); |
3134 | bcmerror = -EBADE; | |
3135 | goto fail; | |
3136 | } | |
3137 | ||
3138 | bcmerror = brcmf_sdbrcm_write_vars(bus); | |
3139 | if (bcmerror) { | |
3140 | brcmf_dbg(ERROR, "no vars written to RAM\n"); | |
3141 | bcmerror = 0; | |
3142 | } | |
3143 | ||
3144 | w_sdreg32(bus, 0xFFFFFFFF, | |
3145 | offsetof(struct sdpcmd_regs, intstatus), &retries); | |
3146 | ||
d77e70ff | 3147 | ci->resetcore(bus->sdiodev, ci, BCMA_CORE_ARM_CM3); |
5b435de0 AS |
3148 | |
3149 | /* Allow HT Clock now that the ARM is running. */ | |
3150 | bus->alp_only = false; | |
3151 | ||
3152 | bus->drvr->busstate = BRCMF_BUS_LOAD; | |
3153 | } | |
3154 | fail: | |
3155 | return bcmerror; | |
3156 | } | |
3157 | ||
3158 | static int brcmf_sdbrcm_get_image(char *buf, int len, struct brcmf_bus *bus) | |
3159 | { | |
3160 | if (bus->firmware->size < bus->fw_ptr + len) | |
3161 | len = bus->firmware->size - bus->fw_ptr; | |
3162 | ||
3163 | memcpy(buf, &bus->firmware->data[bus->fw_ptr], len); | |
3164 | bus->fw_ptr += len; | |
3165 | return len; | |
3166 | } | |
3167 | ||
3168 | MODULE_FIRMWARE(BCM4329_FW_NAME); | |
3169 | MODULE_FIRMWARE(BCM4329_NV_NAME); | |
3170 | ||
3171 | static int brcmf_sdbrcm_download_code_file(struct brcmf_bus *bus) | |
3172 | { | |
3173 | int offset = 0; | |
3174 | uint len; | |
3175 | u8 *memblock = NULL, *memptr; | |
3176 | int ret; | |
3177 | ||
3178 | brcmf_dbg(INFO, "Enter\n"); | |
3179 | ||
3180 | bus->fw_name = BCM4329_FW_NAME; | |
3181 | ret = request_firmware(&bus->firmware, bus->fw_name, | |
3182 | &bus->sdiodev->func[2]->dev); | |
3183 | if (ret) { | |
3184 | brcmf_dbg(ERROR, "Fail to request firmware %d\n", ret); | |
3185 | return ret; | |
3186 | } | |
3187 | bus->fw_ptr = 0; | |
3188 | ||
3189 | memptr = memblock = kmalloc(MEMBLOCK + BRCMF_SDALIGN, GFP_ATOMIC); | |
3190 | if (memblock == NULL) { | |
3191 | ret = -ENOMEM; | |
3192 | goto err; | |
3193 | } | |
3194 | if ((u32)(unsigned long)memblock % BRCMF_SDALIGN) | |
3195 | memptr += (BRCMF_SDALIGN - | |
3196 | ((u32)(unsigned long)memblock % BRCMF_SDALIGN)); | |
3197 | ||
3198 | /* Download image */ | |
3199 | while ((len = | |
3200 | brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus))) { | |
3201 | ret = brcmf_sdbrcm_membytes(bus, true, offset, memptr, len); | |
3202 | if (ret) { | |
3203 | brcmf_dbg(ERROR, "error %d on writing %d membytes at 0x%08x\n", | |
3204 | ret, MEMBLOCK, offset); | |
3205 | goto err; | |
3206 | } | |
3207 | ||
3208 | offset += MEMBLOCK; | |
3209 | } | |
3210 | ||
3211 | err: | |
3212 | kfree(memblock); | |
3213 | ||
3214 | release_firmware(bus->firmware); | |
3215 | bus->fw_ptr = 0; | |
3216 | ||
3217 | return ret; | |
3218 | } | |
3219 | ||
3220 | /* | |
3221 | * ProcessVars:Takes a buffer of "<var>=<value>\n" lines read from a file | |
3222 | * and ending in a NUL. | |
3223 | * Removes carriage returns, empty lines, comment lines, and converts | |
3224 | * newlines to NULs. | |
3225 | * Shortens buffer as needed and pads with NULs. End of buffer is marked | |
3226 | * by two NULs. | |
3227 | */ | |
3228 | ||
3229 | static uint brcmf_process_nvram_vars(char *varbuf, uint len) | |
3230 | { | |
3231 | char *dp; | |
3232 | bool findNewline; | |
3233 | int column; | |
3234 | uint buf_len, n; | |
3235 | ||
3236 | dp = varbuf; | |
3237 | ||
3238 | findNewline = false; | |
3239 | column = 0; | |
3240 | ||
3241 | for (n = 0; n < len; n++) { | |
3242 | if (varbuf[n] == 0) | |
3243 | break; | |
3244 | if (varbuf[n] == '\r') | |
3245 | continue; | |
3246 | if (findNewline && varbuf[n] != '\n') | |
3247 | continue; | |
3248 | findNewline = false; | |
3249 | if (varbuf[n] == '#') { | |
3250 | findNewline = true; | |
3251 | continue; | |
3252 | } | |
3253 | if (varbuf[n] == '\n') { | |
3254 | if (column == 0) | |
3255 | continue; | |
3256 | *dp++ = 0; | |
3257 | column = 0; | |
3258 | continue; | |
3259 | } | |
3260 | *dp++ = varbuf[n]; | |
3261 | column++; | |
3262 | } | |
3263 | buf_len = dp - varbuf; | |
3264 | ||
3265 | while (dp < varbuf + n) | |
3266 | *dp++ = 0; | |
3267 | ||
3268 | return buf_len; | |
3269 | } | |
3270 | ||
3271 | static int brcmf_sdbrcm_download_nvram(struct brcmf_bus *bus) | |
3272 | { | |
3273 | uint len; | |
3274 | char *memblock = NULL; | |
3275 | char *bufp; | |
3276 | int ret; | |
3277 | ||
3278 | bus->nv_name = BCM4329_NV_NAME; | |
3279 | ret = request_firmware(&bus->firmware, bus->nv_name, | |
3280 | &bus->sdiodev->func[2]->dev); | |
3281 | if (ret) { | |
3282 | brcmf_dbg(ERROR, "Fail to request nvram %d\n", ret); | |
3283 | return ret; | |
3284 | } | |
3285 | bus->fw_ptr = 0; | |
3286 | ||
3287 | memblock = kmalloc(MEMBLOCK, GFP_ATOMIC); | |
3288 | if (memblock == NULL) { | |
3289 | ret = -ENOMEM; | |
3290 | goto err; | |
3291 | } | |
3292 | ||
3293 | len = brcmf_sdbrcm_get_image(memblock, MEMBLOCK, bus); | |
3294 | ||
3295 | if (len > 0 && len < MEMBLOCK) { | |
3296 | bufp = (char *)memblock; | |
3297 | bufp[len] = 0; | |
3298 | len = brcmf_process_nvram_vars(bufp, len); | |
3299 | bufp += len; | |
3300 | *bufp++ = 0; | |
3301 | if (len) | |
3302 | ret = brcmf_sdbrcm_downloadvars(bus, memblock, len + 1); | |
3303 | if (ret) | |
3304 | brcmf_dbg(ERROR, "error downloading vars: %d\n", ret); | |
3305 | } else { | |
3306 | brcmf_dbg(ERROR, "error reading nvram file: %d\n", len); | |
3307 | ret = -EIO; | |
3308 | } | |
3309 | ||
3310 | err: | |
3311 | kfree(memblock); | |
3312 | ||
3313 | release_firmware(bus->firmware); | |
3314 | bus->fw_ptr = 0; | |
3315 | ||
3316 | return ret; | |
3317 | } | |
3318 | ||
3319 | static int _brcmf_sdbrcm_download_firmware(struct brcmf_bus *bus) | |
3320 | { | |
3321 | int bcmerror = -1; | |
3322 | ||
3323 | /* Keep arm in reset */ | |
3324 | if (brcmf_sdbrcm_download_state(bus, true)) { | |
3325 | brcmf_dbg(ERROR, "error placing ARM core in reset\n"); | |
3326 | goto err; | |
3327 | } | |
3328 | ||
3329 | /* External image takes precedence if specified */ | |
3330 | if (brcmf_sdbrcm_download_code_file(bus)) { | |
3331 | brcmf_dbg(ERROR, "dongle image file download failed\n"); | |
3332 | goto err; | |
3333 | } | |
3334 | ||
3335 | /* External nvram takes precedence if specified */ | |
3336 | if (brcmf_sdbrcm_download_nvram(bus)) | |
3337 | brcmf_dbg(ERROR, "dongle nvram file download failed\n"); | |
3338 | ||
3339 | /* Take arm out of reset */ | |
3340 | if (brcmf_sdbrcm_download_state(bus, false)) { | |
3341 | brcmf_dbg(ERROR, "error getting out of ARM core reset\n"); | |
3342 | goto err; | |
3343 | } | |
3344 | ||
3345 | bcmerror = 0; | |
3346 | ||
3347 | err: | |
3348 | return bcmerror; | |
3349 | } | |
3350 | ||
3351 | static bool | |
3352 | brcmf_sdbrcm_download_firmware(struct brcmf_bus *bus) | |
3353 | { | |
3354 | bool ret; | |
3355 | ||
3356 | /* Download the firmware */ | |
3357 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); | |
3358 | ||
3359 | ret = _brcmf_sdbrcm_download_firmware(bus) == 0; | |
3360 | ||
3361 | brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false); | |
3362 | ||
3363 | return ret; | |
3364 | } | |
3365 | ||
3366 | void brcmf_sdbrcm_bus_stop(struct brcmf_bus *bus) | |
3367 | { | |
3368 | u32 local_hostintmask; | |
3369 | u8 saveclk; | |
3370 | uint retries; | |
3371 | int err; | |
b83db862 AS |
3372 | struct sk_buff *cur; |
3373 | struct sk_buff *next; | |
5b435de0 AS |
3374 | |
3375 | brcmf_dbg(TRACE, "Enter\n"); | |
3376 | ||
3377 | if (bus->watchdog_tsk) { | |
3378 | send_sig(SIGTERM, bus->watchdog_tsk, 1); | |
3379 | kthread_stop(bus->watchdog_tsk); | |
3380 | bus->watchdog_tsk = NULL; | |
3381 | } | |
3382 | ||
3383 | if (bus->dpc_tsk && bus->dpc_tsk != current) { | |
3384 | send_sig(SIGTERM, bus->dpc_tsk, 1); | |
3385 | kthread_stop(bus->dpc_tsk); | |
3386 | bus->dpc_tsk = NULL; | |
3387 | } | |
3388 | ||
3389 | down(&bus->sdsem); | |
3390 | ||
3391 | bus_wake(bus); | |
3392 | ||
3393 | /* Enable clock for device interrupts */ | |
3394 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); | |
3395 | ||
3396 | /* Disable and clear interrupts at the chip level also */ | |
3397 | w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask), &retries); | |
3398 | local_hostintmask = bus->hostintmask; | |
3399 | bus->hostintmask = 0; | |
3400 | ||
3401 | /* Change our idea of bus state */ | |
3402 | bus->drvr->busstate = BRCMF_BUS_DOWN; | |
3403 | ||
3404 | /* Force clocks on backplane to be sure F2 interrupt propagates */ | |
3405 | saveclk = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
3406 | SBSDIO_FUNC1_CHIPCLKCSR, &err); | |
3407 | if (!err) { | |
3408 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
3409 | SBSDIO_FUNC1_CHIPCLKCSR, | |
3410 | (saveclk | SBSDIO_FORCE_HT), &err); | |
3411 | } | |
3412 | if (err) | |
3413 | brcmf_dbg(ERROR, "Failed to force clock for F2: err %d\n", err); | |
3414 | ||
3415 | /* Turn off the bus (F2), free any pending packets */ | |
3416 | brcmf_dbg(INTR, "disable SDIO interrupts\n"); | |
3417 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_0, SDIO_CCCR_IOEx, | |
3418 | SDIO_FUNC_ENABLE_1, NULL); | |
3419 | ||
3420 | /* Clear any pending interrupts now that F2 is disabled */ | |
3421 | w_sdreg32(bus, local_hostintmask, | |
3422 | offsetof(struct sdpcmd_regs, intstatus), &retries); | |
3423 | ||
3424 | /* Turn off the backplane clock (only) */ | |
3425 | brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false); | |
3426 | ||
3427 | /* Clear the data packet queues */ | |
3428 | brcmu_pktq_flush(&bus->txq, true, NULL, NULL); | |
3429 | ||
3430 | /* Clear any held glomming stuff */ | |
3431 | if (bus->glomd) | |
3432 | brcmu_pkt_buf_free_skb(bus->glomd); | |
b83db862 AS |
3433 | if (!skb_queue_empty(&bus->glom)) |
3434 | skb_queue_walk_safe(&bus->glom, cur, next) { | |
3435 | skb_unlink(cur, &bus->glom); | |
3436 | brcmu_pkt_buf_free_skb(cur); | |
3437 | } | |
5b435de0 AS |
3438 | |
3439 | /* Clear rx control and wake any waiters */ | |
3440 | bus->rxlen = 0; | |
3441 | brcmf_sdbrcm_dcmd_resp_wake(bus); | |
3442 | ||
3443 | /* Reset some F2 state stuff */ | |
3444 | bus->rxskip = false; | |
3445 | bus->tx_seq = bus->rx_seq = 0; | |
3446 | ||
3447 | up(&bus->sdsem); | |
3448 | } | |
3449 | ||
3450 | int brcmf_sdbrcm_bus_init(struct brcmf_pub *drvr) | |
3451 | { | |
3452 | struct brcmf_bus *bus = drvr->bus; | |
3453 | unsigned long timeout; | |
3454 | uint retries = 0; | |
3455 | u8 ready, enable; | |
3456 | int err, ret = 0; | |
3457 | u8 saveclk; | |
3458 | ||
3459 | brcmf_dbg(TRACE, "Enter\n"); | |
3460 | ||
3461 | /* try to download image and nvram to the dongle */ | |
3462 | if (drvr->busstate == BRCMF_BUS_DOWN) { | |
3463 | if (!(brcmf_sdbrcm_download_firmware(bus))) | |
3464 | return -1; | |
3465 | } | |
3466 | ||
3467 | if (!bus->drvr) | |
3468 | return 0; | |
3469 | ||
3470 | /* Start the watchdog timer */ | |
3471 | bus->drvr->tickcnt = 0; | |
3472 | brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS); | |
3473 | ||
3474 | down(&bus->sdsem); | |
3475 | ||
3476 | /* Make sure backplane clock is on, needed to generate F2 interrupt */ | |
3477 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); | |
3478 | if (bus->clkstate != CLK_AVAIL) | |
3479 | goto exit; | |
3480 | ||
3481 | /* Force clocks on backplane to be sure F2 interrupt propagates */ | |
3482 | saveclk = | |
3483 | brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
3484 | SBSDIO_FUNC1_CHIPCLKCSR, &err); | |
3485 | if (!err) { | |
3486 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
3487 | SBSDIO_FUNC1_CHIPCLKCSR, | |
3488 | (saveclk | SBSDIO_FORCE_HT), &err); | |
3489 | } | |
3490 | if (err) { | |
3491 | brcmf_dbg(ERROR, "Failed to force clock for F2: err %d\n", err); | |
3492 | goto exit; | |
3493 | } | |
3494 | ||
3495 | /* Enable function 2 (frame transfers) */ | |
3496 | w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT, | |
3497 | offsetof(struct sdpcmd_regs, tosbmailboxdata), &retries); | |
3498 | enable = (SDIO_FUNC_ENABLE_1 | SDIO_FUNC_ENABLE_2); | |
3499 | ||
3500 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_0, SDIO_CCCR_IOEx, | |
3501 | enable, NULL); | |
3502 | ||
3503 | timeout = jiffies + msecs_to_jiffies(BRCMF_WAIT_F2RDY); | |
3504 | ready = 0; | |
3505 | while (enable != ready) { | |
3506 | ready = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_0, | |
3507 | SDIO_CCCR_IORx, NULL); | |
3508 | if (time_after(jiffies, timeout)) | |
3509 | break; | |
3510 | else if (time_after(jiffies, timeout - BRCMF_WAIT_F2RDY + 50)) | |
3511 | /* prevent busy waiting if it takes too long */ | |
3512 | msleep_interruptible(20); | |
3513 | } | |
3514 | ||
3515 | brcmf_dbg(INFO, "enable 0x%02x, ready 0x%02x\n", enable, ready); | |
3516 | ||
3517 | /* If F2 successfully enabled, set core and enable interrupts */ | |
3518 | if (ready == enable) { | |
3519 | /* Set up the interrupt mask and enable interrupts */ | |
3520 | bus->hostintmask = HOSTINTMASK; | |
3521 | w_sdreg32(bus, bus->hostintmask, | |
3522 | offsetof(struct sdpcmd_regs, hostintmask), &retries); | |
3523 | ||
3524 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
3525 | SBSDIO_WATERMARK, 8, &err); | |
3526 | ||
3527 | /* Set bus state according to enable result */ | |
3528 | drvr->busstate = BRCMF_BUS_DATA; | |
3529 | } | |
3530 | ||
3531 | else { | |
3532 | /* Disable F2 again */ | |
3533 | enable = SDIO_FUNC_ENABLE_1; | |
3534 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_0, | |
3535 | SDIO_CCCR_IOEx, enable, NULL); | |
3536 | } | |
3537 | ||
3538 | /* Restore previous clock setting */ | |
3539 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
3540 | SBSDIO_FUNC1_CHIPCLKCSR, saveclk, &err); | |
3541 | ||
3542 | /* If we didn't come up, turn off backplane clock */ | |
3543 | if (drvr->busstate != BRCMF_BUS_DATA) | |
3544 | brcmf_sdbrcm_clkctl(bus, CLK_NONE, false); | |
3545 | ||
3546 | exit: | |
3547 | up(&bus->sdsem); | |
3548 | ||
3549 | return ret; | |
3550 | } | |
3551 | ||
3552 | void brcmf_sdbrcm_isr(void *arg) | |
3553 | { | |
3554 | struct brcmf_bus *bus = (struct brcmf_bus *) arg; | |
3555 | ||
3556 | brcmf_dbg(TRACE, "Enter\n"); | |
3557 | ||
3558 | if (!bus) { | |
3559 | brcmf_dbg(ERROR, "bus is null pointer, exiting\n"); | |
3560 | return; | |
3561 | } | |
3562 | ||
3563 | if (bus->drvr->busstate == BRCMF_BUS_DOWN) { | |
3564 | brcmf_dbg(ERROR, "bus is down. we have nothing to do\n"); | |
3565 | return; | |
3566 | } | |
3567 | /* Count the interrupt call */ | |
3568 | bus->intrcount++; | |
3569 | bus->ipend = true; | |
3570 | ||
3571 | /* Shouldn't get this interrupt if we're sleeping? */ | |
3572 | if (bus->sleeping) { | |
3573 | brcmf_dbg(ERROR, "INTERRUPT WHILE SLEEPING??\n"); | |
3574 | return; | |
3575 | } | |
3576 | ||
3577 | /* Disable additional interrupts (is this needed now)? */ | |
3578 | if (!bus->intr) | |
3579 | brcmf_dbg(ERROR, "isr w/o interrupt configured!\n"); | |
3580 | ||
3581 | bus->dpc_sched = true; | |
3582 | if (bus->dpc_tsk) | |
3583 | complete(&bus->dpc_wait); | |
3584 | } | |
3585 | ||
3586 | static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_pub *drvr) | |
3587 | { | |
3588 | struct brcmf_bus *bus; | |
3589 | ||
3590 | brcmf_dbg(TIMER, "Enter\n"); | |
3591 | ||
3592 | bus = drvr->bus; | |
3593 | ||
3594 | /* Ignore the timer if simulating bus down */ | |
3595 | if (bus->sleeping) | |
3596 | return false; | |
3597 | ||
3598 | down(&bus->sdsem); | |
3599 | ||
3600 | /* Poll period: check device if appropriate. */ | |
3601 | if (bus->poll && (++bus->polltick >= bus->pollrate)) { | |
3602 | u32 intstatus = 0; | |
3603 | ||
3604 | /* Reset poll tick */ | |
3605 | bus->polltick = 0; | |
3606 | ||
3607 | /* Check device if no interrupts */ | |
3608 | if (!bus->intr || (bus->intrcount == bus->lastintrs)) { | |
3609 | ||
3610 | if (!bus->dpc_sched) { | |
3611 | u8 devpend; | |
3612 | devpend = brcmf_sdcard_cfg_read(bus->sdiodev, | |
3613 | SDIO_FUNC_0, SDIO_CCCR_INTx, | |
3614 | NULL); | |
3615 | intstatus = | |
3616 | devpend & (INTR_STATUS_FUNC1 | | |
3617 | INTR_STATUS_FUNC2); | |
3618 | } | |
3619 | ||
3620 | /* If there is something, make like the ISR and | |
3621 | schedule the DPC */ | |
3622 | if (intstatus) { | |
3623 | bus->pollcnt++; | |
3624 | bus->ipend = true; | |
3625 | ||
3626 | bus->dpc_sched = true; | |
3627 | if (bus->dpc_tsk) | |
3628 | complete(&bus->dpc_wait); | |
3629 | } | |
3630 | } | |
3631 | ||
3632 | /* Update interrupt tracking */ | |
3633 | bus->lastintrs = bus->intrcount; | |
3634 | } | |
3635 | #ifdef BCMDBG | |
3636 | /* Poll for console output periodically */ | |
3637 | if (drvr->busstate == BRCMF_BUS_DATA && bus->console_interval != 0) { | |
3638 | bus->console.count += BRCMF_WD_POLL_MS; | |
3639 | if (bus->console.count >= bus->console_interval) { | |
3640 | bus->console.count -= bus->console_interval; | |
3641 | /* Make sure backplane clock is on */ | |
3642 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); | |
3643 | if (brcmf_sdbrcm_readconsole(bus) < 0) | |
3644 | /* stop on error */ | |
3645 | bus->console_interval = 0; | |
3646 | } | |
3647 | } | |
3648 | #endif /* BCMDBG */ | |
3649 | ||
3650 | /* On idle timeout clear activity flag and/or turn off clock */ | |
3651 | if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) { | |
3652 | if (++bus->idlecount >= bus->idletime) { | |
3653 | bus->idlecount = 0; | |
3654 | if (bus->activity) { | |
3655 | bus->activity = false; | |
3656 | brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS); | |
3657 | } else { | |
3658 | brcmf_sdbrcm_clkctl(bus, CLK_NONE, false); | |
3659 | } | |
3660 | } | |
3661 | } | |
3662 | ||
3663 | up(&bus->sdsem); | |
3664 | ||
3665 | return bus->ipend; | |
3666 | } | |
3667 | ||
3668 | static bool brcmf_sdbrcm_chipmatch(u16 chipid) | |
3669 | { | |
3670 | if (chipid == BCM4329_CHIP_ID) | |
3671 | return true; | |
3672 | return false; | |
3673 | } | |
3674 | ||
3675 | static void brcmf_sdbrcm_release_malloc(struct brcmf_bus *bus) | |
3676 | { | |
3677 | brcmf_dbg(TRACE, "Enter\n"); | |
3678 | ||
3679 | kfree(bus->rxbuf); | |
3680 | bus->rxctl = bus->rxbuf = NULL; | |
3681 | bus->rxlen = 0; | |
3682 | ||
3683 | kfree(bus->databuf); | |
3684 | bus->databuf = NULL; | |
3685 | } | |
3686 | ||
3687 | static bool brcmf_sdbrcm_probe_malloc(struct brcmf_bus *bus) | |
3688 | { | |
3689 | brcmf_dbg(TRACE, "Enter\n"); | |
3690 | ||
3691 | if (bus->drvr->maxctl) { | |
3692 | bus->rxblen = | |
3693 | roundup((bus->drvr->maxctl + SDPCM_HDRLEN), | |
3694 | ALIGNMENT) + BRCMF_SDALIGN; | |
3695 | bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC); | |
3696 | if (!(bus->rxbuf)) | |
3697 | goto fail; | |
3698 | } | |
3699 | ||
3700 | /* Allocate buffer to receive glomed packet */ | |
3701 | bus->databuf = kmalloc(MAX_DATA_BUF, GFP_ATOMIC); | |
3702 | if (!(bus->databuf)) { | |
3703 | /* release rxbuf which was already located as above */ | |
3704 | if (!bus->rxblen) | |
3705 | kfree(bus->rxbuf); | |
3706 | goto fail; | |
3707 | } | |
3708 | ||
3709 | /* Align the buffer */ | |
3710 | if ((unsigned long)bus->databuf % BRCMF_SDALIGN) | |
3711 | bus->dataptr = bus->databuf + (BRCMF_SDALIGN - | |
3712 | ((unsigned long)bus->databuf % BRCMF_SDALIGN)); | |
3713 | else | |
3714 | bus->dataptr = bus->databuf; | |
3715 | ||
3716 | return true; | |
3717 | ||
3718 | fail: | |
3719 | return false; | |
3720 | } | |
3721 | ||
5b435de0 AS |
3722 | static bool |
3723 | brcmf_sdbrcm_probe_attach(struct brcmf_bus *bus, u32 regsva) | |
3724 | { | |
3725 | u8 clkctl = 0; | |
3726 | int err = 0; | |
3727 | int reg_addr; | |
3728 | u32 reg_val; | |
99ba15cd | 3729 | u8 idx; |
5b435de0 AS |
3730 | |
3731 | bus->alp_only = true; | |
3732 | ||
3733 | /* Return the window to backplane enumeration space for core access */ | |
3734 | if (brcmf_sdcard_set_sbaddr_window(bus->sdiodev, SI_ENUM_BASE)) | |
3735 | brcmf_dbg(ERROR, "FAILED to return to SI_ENUM_BASE\n"); | |
3736 | ||
3737 | #ifdef BCMDBG | |
3738 | printk(KERN_DEBUG "F1 signature read @0x18000000=0x%4x\n", | |
3739 | brcmf_sdcard_reg_read(bus->sdiodev, SI_ENUM_BASE, 4)); | |
3740 | ||
3741 | #endif /* BCMDBG */ | |
3742 | ||
3743 | /* | |
a97e4fc5 | 3744 | * Force PLL off until brcmf_sdio_chip_attach() |
5b435de0 AS |
3745 | * programs PLL control regs |
3746 | */ | |
3747 | ||
3748 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
3749 | SBSDIO_FUNC1_CHIPCLKCSR, | |
3750 | BRCMF_INIT_CLKCTL1, &err); | |
3751 | if (!err) | |
3752 | clkctl = | |
3753 | brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1, | |
3754 | SBSDIO_FUNC1_CHIPCLKCSR, &err); | |
3755 | ||
3756 | if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) { | |
3757 | brcmf_dbg(ERROR, "ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n", | |
3758 | err, BRCMF_INIT_CLKCTL1, clkctl); | |
3759 | goto fail; | |
3760 | } | |
3761 | ||
a97e4fc5 FL |
3762 | if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci, regsva)) { |
3763 | brcmf_dbg(ERROR, "brcmf_sdio_chip_attach failed!\n"); | |
5b435de0 AS |
3764 | goto fail; |
3765 | } | |
3766 | ||
3767 | if (!brcmf_sdbrcm_chipmatch((u16) bus->ci->chip)) { | |
3768 | brcmf_dbg(ERROR, "unsupported chip: 0x%04x\n", bus->ci->chip); | |
3769 | goto fail; | |
3770 | } | |
3771 | ||
e12afb6c FL |
3772 | brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci, |
3773 | SDIO_DRIVE_STRENGTH); | |
5b435de0 | 3774 | |
454d2a88 | 3775 | /* Get info on the SOCRAM cores... */ |
5b435de0 AS |
3776 | bus->ramsize = bus->ci->ramsize; |
3777 | if (!(bus->ramsize)) { | |
3778 | brcmf_dbg(ERROR, "failed to find SOCRAM memory!\n"); | |
3779 | goto fail; | |
3780 | } | |
3781 | ||
3782 | /* Set core control so an SDIO reset does a backplane reset */ | |
99ba15cd FL |
3783 | idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV); |
3784 | reg_addr = bus->ci->c_inf[idx].base + | |
5b435de0 AS |
3785 | offsetof(struct sdpcmd_regs, corecontrol); |
3786 | reg_val = brcmf_sdcard_reg_read(bus->sdiodev, reg_addr, sizeof(u32)); | |
3787 | brcmf_sdcard_reg_write(bus->sdiodev, reg_addr, sizeof(u32), | |
3788 | reg_val | CC_BPRESEN); | |
3789 | ||
3790 | brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN); | |
3791 | ||
3792 | /* Locate an appropriately-aligned portion of hdrbuf */ | |
3793 | bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0], | |
3794 | BRCMF_SDALIGN); | |
3795 | ||
3796 | /* Set the poll and/or interrupt flags */ | |
3797 | bus->intr = true; | |
3798 | bus->poll = false; | |
3799 | if (bus->poll) | |
3800 | bus->pollrate = 1; | |
3801 | ||
3802 | return true; | |
3803 | ||
3804 | fail: | |
3805 | return false; | |
3806 | } | |
3807 | ||
3808 | static bool brcmf_sdbrcm_probe_init(struct brcmf_bus *bus) | |
3809 | { | |
3810 | brcmf_dbg(TRACE, "Enter\n"); | |
3811 | ||
3812 | /* Disable F2 to clear any intermediate frame state on the dongle */ | |
3813 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_0, SDIO_CCCR_IOEx, | |
3814 | SDIO_FUNC_ENABLE_1, NULL); | |
3815 | ||
3816 | bus->drvr->busstate = BRCMF_BUS_DOWN; | |
3817 | bus->sleeping = false; | |
3818 | bus->rxflow = false; | |
3819 | ||
3820 | /* Done with backplane-dependent accesses, can drop clock... */ | |
3821 | brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1, | |
3822 | SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL); | |
3823 | ||
3824 | /* ...and initialize clock/power states */ | |
3825 | bus->clkstate = CLK_SDONLY; | |
3826 | bus->idletime = BRCMF_IDLE_INTERVAL; | |
3827 | bus->idleclock = BRCMF_IDLE_ACTIVE; | |
3828 | ||
3829 | /* Query the F2 block size, set roundup accordingly */ | |
3830 | bus->blocksize = bus->sdiodev->func[2]->cur_blksize; | |
3831 | bus->roundup = min(max_roundup, bus->blocksize); | |
3832 | ||
3833 | /* bus module does not support packet chaining */ | |
3834 | bus->use_rxchain = false; | |
3835 | bus->sd_rxchain = false; | |
3836 | ||
3837 | return true; | |
3838 | } | |
3839 | ||
3840 | static int | |
3841 | brcmf_sdbrcm_watchdog_thread(void *data) | |
3842 | { | |
3843 | struct brcmf_bus *bus = (struct brcmf_bus *)data; | |
3844 | ||
3845 | allow_signal(SIGTERM); | |
3846 | /* Run until signal received */ | |
3847 | while (1) { | |
3848 | if (kthread_should_stop()) | |
3849 | break; | |
3850 | if (!wait_for_completion_interruptible(&bus->watchdog_wait)) { | |
3851 | brcmf_sdbrcm_bus_watchdog(bus->drvr); | |
3852 | /* Count the tick for reference */ | |
3853 | bus->drvr->tickcnt++; | |
3854 | } else | |
3855 | break; | |
3856 | } | |
3857 | return 0; | |
3858 | } | |
3859 | ||
3860 | static void | |
3861 | brcmf_sdbrcm_watchdog(unsigned long data) | |
3862 | { | |
3863 | struct brcmf_bus *bus = (struct brcmf_bus *)data; | |
3864 | ||
3865 | if (bus->watchdog_tsk) { | |
3866 | complete(&bus->watchdog_wait); | |
3867 | /* Reschedule the watchdog */ | |
3868 | if (bus->wd_timer_valid) | |
3869 | mod_timer(&bus->timer, | |
3870 | jiffies + BRCMF_WD_POLL_MS * HZ / 1000); | |
3871 | } | |
3872 | } | |
3873 | ||
5b435de0 AS |
3874 | static void brcmf_sdbrcm_release_dongle(struct brcmf_bus *bus) |
3875 | { | |
3876 | brcmf_dbg(TRACE, "Enter\n"); | |
3877 | ||
3878 | if (bus->ci) { | |
3879 | brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false); | |
3880 | brcmf_sdbrcm_clkctl(bus, CLK_NONE, false); | |
a8a6c045 | 3881 | brcmf_sdio_chip_detach(&bus->ci); |
5b435de0 AS |
3882 | if (bus->vars && bus->varsz) |
3883 | kfree(bus->vars); | |
3884 | bus->vars = NULL; | |
3885 | } | |
3886 | ||
3887 | brcmf_dbg(TRACE, "Disconnected\n"); | |
3888 | } | |
3889 | ||
3890 | /* Detach and free everything */ | |
3891 | static void brcmf_sdbrcm_release(struct brcmf_bus *bus) | |
3892 | { | |
3893 | brcmf_dbg(TRACE, "Enter\n"); | |
3894 | ||
3895 | if (bus) { | |
3896 | /* De-register interrupt handler */ | |
3897 | brcmf_sdcard_intr_dereg(bus->sdiodev); | |
3898 | ||
3899 | if (bus->drvr) { | |
3900 | brcmf_detach(bus->drvr); | |
3901 | brcmf_sdbrcm_release_dongle(bus); | |
3902 | bus->drvr = NULL; | |
3903 | } | |
3904 | ||
3905 | brcmf_sdbrcm_release_malloc(bus); | |
3906 | ||
3907 | kfree(bus); | |
3908 | } | |
3909 | ||
3910 | brcmf_dbg(TRACE, "Disconnected\n"); | |
3911 | } | |
3912 | ||
3913 | void *brcmf_sdbrcm_probe(u16 bus_no, u16 slot, u16 func, uint bustype, | |
3914 | u32 regsva, struct brcmf_sdio_dev *sdiodev) | |
3915 | { | |
3916 | int ret; | |
3917 | struct brcmf_bus *bus; | |
3918 | ||
3919 | /* Init global variables at run-time, not as part of the declaration. | |
3920 | * This is required to support init/de-init of the driver. | |
3921 | * Initialization | |
3922 | * of globals as part of the declaration results in non-deterministic | |
3923 | * behavior since the value of the globals may be different on the | |
3924 | * first time that the driver is initialized vs subsequent | |
3925 | * initializations. | |
3926 | */ | |
3927 | brcmf_c_init(); | |
3928 | ||
3929 | brcmf_dbg(TRACE, "Enter\n"); | |
3930 | ||
3931 | /* We make an assumption about address window mappings: | |
3932 | * regsva == SI_ENUM_BASE*/ | |
3933 | ||
3934 | /* Allocate private bus interface state */ | |
3935 | bus = kzalloc(sizeof(struct brcmf_bus), GFP_ATOMIC); | |
3936 | if (!bus) | |
3937 | goto fail; | |
3938 | ||
3939 | bus->sdiodev = sdiodev; | |
3940 | sdiodev->bus = bus; | |
b83db862 | 3941 | skb_queue_head_init(&bus->glom); |
5b435de0 AS |
3942 | bus->txbound = BRCMF_TXBOUND; |
3943 | bus->rxbound = BRCMF_RXBOUND; | |
3944 | bus->txminmax = BRCMF_TXMINMAX; | |
3945 | bus->tx_seq = SDPCM_SEQUENCE_WRAP - 1; | |
3946 | bus->usebufpool = false; /* Use bufpool if allocated, | |
3947 | else use locally malloced rxbuf */ | |
3948 | ||
3949 | /* attempt to attach to the dongle */ | |
3950 | if (!(brcmf_sdbrcm_probe_attach(bus, regsva))) { | |
3951 | brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_attach failed\n"); | |
3952 | goto fail; | |
3953 | } | |
3954 | ||
3955 | spin_lock_init(&bus->txqlock); | |
3956 | init_waitqueue_head(&bus->ctrl_wait); | |
3957 | init_waitqueue_head(&bus->dcmd_resp_wait); | |
3958 | ||
3959 | /* Set up the watchdog timer */ | |
3960 | init_timer(&bus->timer); | |
3961 | bus->timer.data = (unsigned long)bus; | |
3962 | bus->timer.function = brcmf_sdbrcm_watchdog; | |
3963 | ||
3964 | /* Initialize thread based operation and lock */ | |
3965 | sema_init(&bus->sdsem, 1); | |
3966 | ||
3967 | /* Initialize watchdog thread */ | |
3968 | init_completion(&bus->watchdog_wait); | |
3969 | bus->watchdog_tsk = kthread_run(brcmf_sdbrcm_watchdog_thread, | |
3970 | bus, "brcmf_watchdog"); | |
3971 | if (IS_ERR(bus->watchdog_tsk)) { | |
3972 | printk(KERN_WARNING | |
3973 | "brcmf_watchdog thread failed to start\n"); | |
3974 | bus->watchdog_tsk = NULL; | |
3975 | } | |
3976 | /* Initialize DPC thread */ | |
3977 | init_completion(&bus->dpc_wait); | |
3978 | bus->dpc_tsk = kthread_run(brcmf_sdbrcm_dpc_thread, | |
3979 | bus, "brcmf_dpc"); | |
3980 | if (IS_ERR(bus->dpc_tsk)) { | |
3981 | printk(KERN_WARNING | |
3982 | "brcmf_dpc thread failed to start\n"); | |
3983 | bus->dpc_tsk = NULL; | |
3984 | } | |
3985 | ||
3986 | /* Attach to the brcmf/OS/network interface */ | |
3987 | bus->drvr = brcmf_attach(bus, SDPCM_RESERVE); | |
3988 | if (!bus->drvr) { | |
3989 | brcmf_dbg(ERROR, "brcmf_attach failed\n"); | |
3990 | goto fail; | |
3991 | } | |
3992 | ||
3993 | /* Allocate buffers */ | |
3994 | if (!(brcmf_sdbrcm_probe_malloc(bus))) { | |
3995 | brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_malloc failed\n"); | |
3996 | goto fail; | |
3997 | } | |
3998 | ||
3999 | if (!(brcmf_sdbrcm_probe_init(bus))) { | |
4000 | brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_init failed\n"); | |
4001 | goto fail; | |
4002 | } | |
4003 | ||
4004 | /* Register interrupt callback, but mask it (not operational yet). */ | |
4005 | brcmf_dbg(INTR, "disable SDIO interrupts (not interested yet)\n"); | |
4006 | ret = brcmf_sdcard_intr_reg(bus->sdiodev); | |
4007 | if (ret != 0) { | |
4008 | brcmf_dbg(ERROR, "FAILED: sdcard_intr_reg returned %d\n", ret); | |
4009 | goto fail; | |
4010 | } | |
4011 | brcmf_dbg(INTR, "registered SDIO interrupt function ok\n"); | |
4012 | ||
4013 | brcmf_dbg(INFO, "completed!!\n"); | |
4014 | ||
4015 | /* if firmware path present try to download and bring up bus */ | |
4016 | ret = brcmf_bus_start(bus->drvr); | |
4017 | if (ret != 0) { | |
4018 | if (ret == -ENOLINK) { | |
4019 | brcmf_dbg(ERROR, "dongle is not responding\n"); | |
4020 | goto fail; | |
4021 | } | |
4022 | } | |
15d45b6f FL |
4023 | |
4024 | /* add interface and open for business */ | |
4025 | if (brcmf_add_if((struct brcmf_info *)bus->drvr, 0, "wlan%d", NULL)) { | |
4026 | brcmf_dbg(ERROR, "Add primary net device interface failed!!\n"); | |
5b435de0 AS |
4027 | goto fail; |
4028 | } | |
4029 | ||
4030 | return bus; | |
4031 | ||
4032 | fail: | |
4033 | brcmf_sdbrcm_release(bus); | |
4034 | return NULL; | |
4035 | } | |
4036 | ||
4037 | void brcmf_sdbrcm_disconnect(void *ptr) | |
4038 | { | |
4039 | struct brcmf_bus *bus = (struct brcmf_bus *)ptr; | |
4040 | ||
4041 | brcmf_dbg(TRACE, "Enter\n"); | |
4042 | ||
4043 | if (bus) | |
4044 | brcmf_sdbrcm_release(bus); | |
4045 | ||
4046 | brcmf_dbg(TRACE, "Disconnected\n"); | |
4047 | } | |
4048 | ||
4049 | struct device *brcmf_bus_get_device(struct brcmf_bus *bus) | |
4050 | { | |
4051 | return &bus->sdiodev->func[2]->dev; | |
4052 | } | |
4053 | ||
4054 | void | |
4055 | brcmf_sdbrcm_wd_timer(struct brcmf_bus *bus, uint wdtick) | |
4056 | { | |
5b435de0 AS |
4057 | /* Totally stop the timer */ |
4058 | if (!wdtick && bus->wd_timer_valid == true) { | |
4059 | del_timer_sync(&bus->timer); | |
4060 | bus->wd_timer_valid = false; | |
4061 | bus->save_ms = wdtick; | |
4062 | return; | |
4063 | } | |
4064 | ||
ece960ea FL |
4065 | /* don't start the wd until fw is loaded */ |
4066 | if (bus->drvr->busstate == BRCMF_BUS_DOWN) | |
4067 | return; | |
4068 | ||
5b435de0 AS |
4069 | if (wdtick) { |
4070 | if (bus->save_ms != BRCMF_WD_POLL_MS) { | |
4071 | if (bus->wd_timer_valid == true) | |
4072 | /* Stop timer and restart at new value */ | |
4073 | del_timer_sync(&bus->timer); | |
4074 | ||
4075 | /* Create timer again when watchdog period is | |
4076 | dynamically changed or in the first instance | |
4077 | */ | |
4078 | bus->timer.expires = | |
4079 | jiffies + BRCMF_WD_POLL_MS * HZ / 1000; | |
4080 | add_timer(&bus->timer); | |
4081 | ||
4082 | } else { | |
4083 | /* Re arm the timer, at last watchdog period */ | |
4084 | mod_timer(&bus->timer, | |
4085 | jiffies + BRCMF_WD_POLL_MS * HZ / 1000); | |
4086 | } | |
4087 | ||
4088 | bus->wd_timer_valid = true; | |
4089 | bus->save_ms = wdtick; | |
4090 | } | |
4091 | } |