2 * Copyright (c) 2010 Broadcom Corporation
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.
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.
17 #include <linux/types.h>
18 #include <linux/kernel.h>
19 #include <linux/kthread.h>
20 #include <linux/printk.h>
21 #include <linux/pci_ids.h>
22 #include <linux/netdevice.h>
23 #include <linux/interrupt.h>
24 #include <linux/sched.h>
25 #include <linux/mmc/sdio.h>
26 #include <linux/mmc/sdio_func.h>
27 #include <linux/mmc/card.h>
28 #include <linux/semaphore.h>
29 #include <linux/firmware.h>
30 #include <linux/module.h>
31 #include <linux/bcma/bcma.h>
32 #include <linux/debugfs.h>
33 #include <linux/vmalloc.h>
34 #include <linux/platform_data/brcmfmac-sdio.h>
35 #include <linux/moduleparam.h>
36 #include <asm/unaligned.h>
38 #include <brcmu_wifi.h>
39 #include <brcmu_utils.h>
40 #include <brcm_hw_ids.h>
42 #include "sdio_host.h"
43 #include "sdio_chip.h"
45 #define DCMD_RESP_TIMEOUT 2000 /* In milli second */
49 #define BRCMF_TRAP_INFO_SIZE 80
51 #define CBUF_LEN (128)
53 /* Device console log buffer state */
54 #define CONSOLE_BUFFER_MAX 2024
57 __le32 buf; /* Can't be pointer on (64-bit) hosts */
60 char *_buf_compat; /* Redundant pointer for backward compat. */
65 * When there is no UART (e.g. Quickturn),
66 * the host should write a complete
67 * input line directly into cbuf and then write
68 * the length into vcons_in.
69 * This may also be used when there is a real UART
70 * (at risk of conflicting with
71 * the real UART). vcons_out is currently unused.
76 /* Output (logging) buffer
77 * Console output is written to a ring buffer log_buf at index log_idx.
78 * The host may read the output when it sees log_idx advance.
79 * Output will be lost if the output wraps around faster than the host
82 struct rte_log_le log_le;
84 /* Console input line buffer
85 * Characters are read one at a time into cbuf
86 * until <CR> is received, then
87 * the buffer is processed as a command line.
88 * Also used for virtual UART.
95 #include <chipcommon.h>
99 #include "tracepoint.h"
101 #define TXQLEN 2048 /* bulk tx queue length */
102 #define TXHI (TXQLEN - 256) /* turn on flow control above TXHI */
103 #define TXLOW (TXHI - 256) /* turn off flow control below TXLOW */
106 #define TXRETRIES 2 /* # of retries for tx frames */
108 #define BRCMF_RXBOUND 50 /* Default for max rx frames in
111 #define BRCMF_TXBOUND 20 /* Default for max tx frames in
114 #define BRCMF_DEFAULT_TXGLOM_SIZE 32 /* max tx frames in glom chain */
116 #define BRCMF_TXMINMAX 1 /* Max tx frames if rx still pending */
118 #define MEMBLOCK 2048 /* Block size used for downloading
120 #define MAX_DATA_BUF (32 * 1024) /* Must be large enough to hold
121 biggest possible glom */
123 #define BRCMF_FIRSTREAD (1 << 6)
126 /* SBSDIO_DEVICE_CTL */
128 /* 1: device will assert busy signal when receiving CMD53 */
129 #define SBSDIO_DEVCTL_SETBUSY 0x01
130 /* 1: assertion of sdio interrupt is synchronous to the sdio clock */
131 #define SBSDIO_DEVCTL_SPI_INTR_SYNC 0x02
132 /* 1: mask all interrupts to host except the chipActive (rev 8) */
133 #define SBSDIO_DEVCTL_CA_INT_ONLY 0x04
134 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
135 * sdio bus power cycle to clear (rev 9) */
136 #define SBSDIO_DEVCTL_PADS_ISO 0x08
137 /* Force SD->SB reset mapping (rev 11) */
138 #define SBSDIO_DEVCTL_SB_RST_CTL 0x30
139 /* Determined by CoreControl bit */
140 #define SBSDIO_DEVCTL_RST_CORECTL 0x00
141 /* Force backplane reset */
142 #define SBSDIO_DEVCTL_RST_BPRESET 0x10
143 /* Force no backplane reset */
144 #define SBSDIO_DEVCTL_RST_NOBPRESET 0x20
146 /* direct(mapped) cis space */
148 /* MAPPED common CIS address */
149 #define SBSDIO_CIS_BASE_COMMON 0x1000
150 /* maximum bytes in one CIS */
151 #define SBSDIO_CIS_SIZE_LIMIT 0x200
152 /* cis offset addr is < 17 bits */
153 #define SBSDIO_CIS_OFT_ADDR_MASK 0x1FFFF
155 /* manfid tuple length, include tuple, link bytes */
156 #define SBSDIO_CIS_MANFID_TUPLE_LEN 6
159 #define I_SMB_SW0 (1 << 0) /* To SB Mail S/W interrupt 0 */
160 #define I_SMB_SW1 (1 << 1) /* To SB Mail S/W interrupt 1 */
161 #define I_SMB_SW2 (1 << 2) /* To SB Mail S/W interrupt 2 */
162 #define I_SMB_SW3 (1 << 3) /* To SB Mail S/W interrupt 3 */
163 #define I_SMB_SW_MASK 0x0000000f /* To SB Mail S/W interrupts mask */
164 #define I_SMB_SW_SHIFT 0 /* To SB Mail S/W interrupts shift */
165 #define I_HMB_SW0 (1 << 4) /* To Host Mail S/W interrupt 0 */
166 #define I_HMB_SW1 (1 << 5) /* To Host Mail S/W interrupt 1 */
167 #define I_HMB_SW2 (1 << 6) /* To Host Mail S/W interrupt 2 */
168 #define I_HMB_SW3 (1 << 7) /* To Host Mail S/W interrupt 3 */
169 #define I_HMB_SW_MASK 0x000000f0 /* To Host Mail S/W interrupts mask */
170 #define I_HMB_SW_SHIFT 4 /* To Host Mail S/W interrupts shift */
171 #define I_WR_OOSYNC (1 << 8) /* Write Frame Out Of Sync */
172 #define I_RD_OOSYNC (1 << 9) /* Read Frame Out Of Sync */
173 #define I_PC (1 << 10) /* descriptor error */
174 #define I_PD (1 << 11) /* data error */
175 #define I_DE (1 << 12) /* Descriptor protocol Error */
176 #define I_RU (1 << 13) /* Receive descriptor Underflow */
177 #define I_RO (1 << 14) /* Receive fifo Overflow */
178 #define I_XU (1 << 15) /* Transmit fifo Underflow */
179 #define I_RI (1 << 16) /* Receive Interrupt */
180 #define I_BUSPWR (1 << 17) /* SDIO Bus Power Change (rev 9) */
181 #define I_XMTDATA_AVAIL (1 << 23) /* bits in fifo */
182 #define I_XI (1 << 24) /* Transmit Interrupt */
183 #define I_RF_TERM (1 << 25) /* Read Frame Terminate */
184 #define I_WF_TERM (1 << 26) /* Write Frame Terminate */
185 #define I_PCMCIA_XU (1 << 27) /* PCMCIA Transmit FIFO Underflow */
186 #define I_SBINT (1 << 28) /* sbintstatus Interrupt */
187 #define I_CHIPACTIVE (1 << 29) /* chip from doze to active state */
188 #define I_SRESET (1 << 30) /* CCCR RES interrupt */
189 #define I_IOE2 (1U << 31) /* CCCR IOE2 Bit Changed */
190 #define I_ERRORS (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
191 #define I_DMA (I_RI | I_XI | I_ERRORS)
194 #define CC_CISRDY (1 << 0) /* CIS Ready */
195 #define CC_BPRESEN (1 << 1) /* CCCR RES signal */
196 #define CC_F2RDY (1 << 2) /* set CCCR IOR2 bit */
197 #define CC_CLRPADSISO (1 << 3) /* clear SDIO pads isolation */
198 #define CC_XMTDATAAVAIL_MODE (1 << 4)
199 #define CC_XMTDATAAVAIL_CTRL (1 << 5)
202 #define SFC_RF_TERM (1 << 0) /* Read Frame Terminate */
203 #define SFC_WF_TERM (1 << 1) /* Write Frame Terminate */
204 #define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */
205 #define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */
208 * Software allocation of To SB Mailbox resources
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 */
217 /* tosbmailboxdata */
218 #define SMB_DATA_VERSION_SHIFT 16 /* host protocol version */
221 * Software allocation of To Host Mailbox resources
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 */
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 */
236 #define HMB_DATA_FCDATA_MASK 0xff000000
237 #define HMB_DATA_FCDATA_SHIFT 24
239 #define HMB_DATA_VERSION_MASK 0x00ff0000
240 #define HMB_DATA_VERSION_SHIFT 16
243 * Software-defined protocol header
246 /* Current protocol version */
247 #define SDPCM_PROT_VERSION 4
250 * Shared structure between dongle and the host.
251 * The structure contains pointers to trap or assert information.
253 #define SDPCM_SHARED_VERSION 0x0003
254 #define SDPCM_SHARED_VERSION_MASK 0x00FF
255 #define SDPCM_SHARED_ASSERT_BUILT 0x0100
256 #define SDPCM_SHARED_ASSERT 0x0200
257 #define SDPCM_SHARED_TRAP 0x0400
259 /* Space for header read, limit for data packets */
260 #define MAX_HDR_READ (1 << 6)
261 #define MAX_RX_DATASZ 2048
263 /* Bump up limit on waiting for HT to account for first startup;
264 * if the image is doing a CRC calculation before programming the PMU
265 * for HT availability, it could take a couple hundred ms more, so
266 * max out at a 1 second (1000000us).
268 #undef PMU_MAX_TRANSITION_DLY
269 #define PMU_MAX_TRANSITION_DLY 1000000
271 /* Value for ChipClockCSR during initial setup */
272 #define BRCMF_INIT_CLKCTL1 (SBSDIO_FORCE_HW_CLKREQ_OFF | \
273 SBSDIO_ALP_AVAIL_REQ)
275 /* Flags for SDH calls */
276 #define F2SYNC (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
278 #define BRCMF_IDLE_IMMEDIATE (-1) /* Enter idle immediately */
279 #define BRCMF_IDLE_ACTIVE 0 /* Do not request any SD clock change
282 #define BRCMF_IDLE_INTERVAL 1
284 #define KSO_WAIT_US 50
285 #define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US)
288 * Conversion of 802.1D priority to precedence level
290 static uint prio2prec(u32 prio)
292 return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
297 /* Device console log buffer state */
298 struct brcmf_console {
299 uint count; /* Poll interval msec counter */
300 uint log_addr; /* Log struct address (fixed) */
301 struct rte_log_le log_le; /* Log struct (host copy) */
302 uint bufsize; /* Size of log buffer */
303 u8 *buf; /* Log buffer (host copy) */
304 uint last; /* Last buffer read index */
307 struct brcmf_trap_info {
321 __le32 r9; /* sb/v6 */
322 __le32 r10; /* sl/v7 */
323 __le32 r11; /* fp/v8 */
331 struct sdpcm_shared {
335 u32 assert_file_addr;
337 u32 console_addr; /* Address of struct rte_console */
343 struct sdpcm_shared_le {
346 __le32 assert_exp_addr;
347 __le32 assert_file_addr;
349 __le32 console_addr; /* Address of struct rte_console */
350 __le32 msgtrace_addr;
355 /* dongle SDIO bus specific header info */
356 struct brcmf_sdio_hdrinfo {
367 /* misc chip info needed by some of the routines */
368 /* Private data for SDIO bus interaction */
370 struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
371 struct chip_info *ci; /* Chip info struct */
372 char *vars; /* Variables (from CIS and/or other) */
373 uint varsz; /* Size of variables buffer */
375 u32 ramsize; /* Size of RAM in SOCRAM (bytes) */
377 u32 hostintmask; /* Copy of Host Interrupt Mask */
378 atomic_t intstatus; /* Intstatus bits (events) pending */
379 atomic_t fcstate; /* State of dongle flow-control */
381 uint blocksize; /* Block size of SDIO transfers */
382 uint roundup; /* Max roundup limit */
384 struct pktq txq; /* Queue length used for flow-control */
385 u8 flowcontrol; /* per prio flow control bitmask */
386 u8 tx_seq; /* Transmit sequence number (next) */
387 u8 tx_max; /* Maximum transmit sequence allowed */
389 u8 *hdrbuf; /* buffer for handling rx frame */
390 u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */
391 u8 rx_seq; /* Receive sequence number (expected) */
392 struct brcmf_sdio_hdrinfo cur_read;
393 /* info of current read frame */
394 bool rxskip; /* Skip receive (awaiting NAK ACK) */
395 bool rxpending; /* Data frame pending in dongle */
397 uint rxbound; /* Rx frames to read before resched */
398 uint txbound; /* Tx frames to send before resched */
401 struct sk_buff *glomd; /* Packet containing glomming descriptor */
402 struct sk_buff_head glom; /* Packet list for glommed superframe */
403 uint glomerr; /* Glom packet read errors */
405 u8 *rxbuf; /* Buffer for receiving control packets */
406 uint rxblen; /* Allocated length of rxbuf */
407 u8 *rxctl; /* Aligned pointer into rxbuf */
408 u8 *rxctl_orig; /* pointer for freeing rxctl */
409 uint rxlen; /* Length of valid data in buffer */
410 spinlock_t rxctl_lock; /* protection lock for ctrl frame resources */
412 u8 sdpcm_ver; /* Bus protocol reported by dongle */
414 bool intr; /* Use interrupts */
415 bool poll; /* Use polling */
416 atomic_t ipend; /* Device interrupt is pending */
417 uint spurious; /* Count of spurious interrupts */
418 uint pollrate; /* Ticks between device polls */
419 uint polltick; /* Tick counter */
422 uint console_interval;
423 struct brcmf_console console; /* Console output polling support */
424 uint console_addr; /* Console address from shared struct */
427 uint clkstate; /* State of sd and backplane clock(s) */
428 bool activity; /* Activity flag for clock down */
429 s32 idletime; /* Control for activity timeout */
430 s32 idlecount; /* Activity timeout counter */
431 s32 idleclock; /* How to set bus driver when idle */
432 bool rxflow_mode; /* Rx flow control mode */
433 bool rxflow; /* Is rx flow control on */
434 bool alp_only; /* Don't use HT clock (ALP only) */
438 bool ctrl_frame_stat;
441 wait_queue_head_t ctrl_wait;
442 wait_queue_head_t dcmd_resp_wait;
444 struct timer_list timer;
445 struct completion watchdog_wait;
446 struct task_struct *watchdog_tsk;
450 struct workqueue_struct *brcmf_wq;
451 struct work_struct datawork;
454 bool txoff; /* Transmit flow-controlled */
455 struct brcmf_sdio_count sdcnt;
456 bool sr_enabled; /* SaveRestore enabled */
457 bool sleeping; /* SDIO bus sleeping */
459 u8 tx_hdrlen; /* sdio bus header length for tx packet */
460 bool txglom; /* host tx glomming enable flag */
461 struct sk_buff *txglom_sgpad; /* scatter-gather padding buffer */
462 u16 head_align; /* buffer pointer alignment */
463 u16 sgentry_align; /* scatter-gather buffer alignment */
469 #define CLK_PENDING 2
473 static int qcount[NUMPRIO];
476 #define DEFAULT_SDIO_DRIVE_STRENGTH 6 /* in milliamps */
478 #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
480 /* Retry count for register access failures */
481 static const uint retry_limit = 2;
483 /* Limit on rounding up frames */
484 static const uint max_roundup = 512;
488 static int brcmf_sdio_txglomsz = BRCMF_DEFAULT_TXGLOM_SIZE;
489 module_param_named(txglomsz, brcmf_sdio_txglomsz, int, 0);
490 MODULE_PARM_DESC(txglomsz, "maximum tx packet chain size [SDIO]");
492 enum brcmf_sdio_frmtype {
493 BRCMF_SDIO_FT_NORMAL,
498 #define BCM43143_FIRMWARE_NAME "brcm/brcmfmac43143-sdio.bin"
499 #define BCM43143_NVRAM_NAME "brcm/brcmfmac43143-sdio.txt"
500 #define BCM43241B0_FIRMWARE_NAME "brcm/brcmfmac43241b0-sdio.bin"
501 #define BCM43241B0_NVRAM_NAME "brcm/brcmfmac43241b0-sdio.txt"
502 #define BCM43241B4_FIRMWARE_NAME "brcm/brcmfmac43241b4-sdio.bin"
503 #define BCM43241B4_NVRAM_NAME "brcm/brcmfmac43241b4-sdio.txt"
504 #define BCM4329_FIRMWARE_NAME "brcm/brcmfmac4329-sdio.bin"
505 #define BCM4329_NVRAM_NAME "brcm/brcmfmac4329-sdio.txt"
506 #define BCM4330_FIRMWARE_NAME "brcm/brcmfmac4330-sdio.bin"
507 #define BCM4330_NVRAM_NAME "brcm/brcmfmac4330-sdio.txt"
508 #define BCM4334_FIRMWARE_NAME "brcm/brcmfmac4334-sdio.bin"
509 #define BCM4334_NVRAM_NAME "brcm/brcmfmac4334-sdio.txt"
510 #define BCM4335_FIRMWARE_NAME "brcm/brcmfmac4335-sdio.bin"
511 #define BCM4335_NVRAM_NAME "brcm/brcmfmac4335-sdio.txt"
512 #define BCM4339_FIRMWARE_NAME "brcm/brcmfmac4339-sdio.bin"
513 #define BCM4339_NVRAM_NAME "brcm/brcmfmac4339-sdio.txt"
515 MODULE_FIRMWARE(BCM43143_FIRMWARE_NAME);
516 MODULE_FIRMWARE(BCM43143_NVRAM_NAME);
517 MODULE_FIRMWARE(BCM43241B0_FIRMWARE_NAME);
518 MODULE_FIRMWARE(BCM43241B0_NVRAM_NAME);
519 MODULE_FIRMWARE(BCM43241B4_FIRMWARE_NAME);
520 MODULE_FIRMWARE(BCM43241B4_NVRAM_NAME);
521 MODULE_FIRMWARE(BCM4329_FIRMWARE_NAME);
522 MODULE_FIRMWARE(BCM4329_NVRAM_NAME);
523 MODULE_FIRMWARE(BCM4330_FIRMWARE_NAME);
524 MODULE_FIRMWARE(BCM4330_NVRAM_NAME);
525 MODULE_FIRMWARE(BCM4334_FIRMWARE_NAME);
526 MODULE_FIRMWARE(BCM4334_NVRAM_NAME);
527 MODULE_FIRMWARE(BCM4335_FIRMWARE_NAME);
528 MODULE_FIRMWARE(BCM4335_NVRAM_NAME);
529 MODULE_FIRMWARE(BCM4339_FIRMWARE_NAME);
530 MODULE_FIRMWARE(BCM4339_NVRAM_NAME);
532 struct brcmf_firmware_names {
539 enum brcmf_firmware_type {
544 #define BRCMF_FIRMWARE_NVRAM(name) \
545 name ## _FIRMWARE_NAME, name ## _NVRAM_NAME
547 static const struct brcmf_firmware_names brcmf_fwname_data[] = {
548 { BCM43143_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM43143) },
549 { BCM43241_CHIP_ID, 0x0000001F, BRCMF_FIRMWARE_NVRAM(BCM43241B0) },
550 { BCM43241_CHIP_ID, 0xFFFFFFE0, BRCMF_FIRMWARE_NVRAM(BCM43241B4) },
551 { BCM4329_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4329) },
552 { BCM4330_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4330) },
553 { BCM4334_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4334) },
554 { BCM4335_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4335) },
555 { BCM4339_CHIP_ID, 0xFFFFFFFF, BRCMF_FIRMWARE_NVRAM(BCM4339) }
559 static const struct firmware *brcmf_sdio_get_fw(struct brcmf_sdio *bus,
560 enum brcmf_firmware_type type)
562 const struct firmware *fw;
566 for (i = 0; i < ARRAY_SIZE(brcmf_fwname_data); i++) {
567 if (brcmf_fwname_data[i].chipid == bus->ci->chip &&
568 brcmf_fwname_data[i].revmsk & BIT(bus->ci->chiprev)) {
570 case BRCMF_FIRMWARE_BIN:
571 name = brcmf_fwname_data[i].bin;
573 case BRCMF_FIRMWARE_NVRAM:
574 name = brcmf_fwname_data[i].nv;
577 brcmf_err("invalid firmware type (%d)\n", type);
583 brcmf_err("Unknown chipid %d [%d]\n",
584 bus->ci->chip, bus->ci->chiprev);
588 err = request_firmware(&fw, name, &bus->sdiodev->func[2]->dev);
589 if ((err) || (!fw)) {
590 brcmf_err("fail to request firmware %s (%d)\n", name, err);
597 static void pkt_align(struct sk_buff *p, int len, int align)
600 datalign = (unsigned long)(p->data);
601 datalign = roundup(datalign, (align)) - datalign;
603 skb_pull(p, datalign);
607 /* To check if there's window offered */
608 static bool data_ok(struct brcmf_sdio *bus)
610 return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
611 ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
615 * Reads a register in the SDIO hardware block. This block occupies a series of
616 * adresses on the 32 bit backplane bus.
619 r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset)
621 u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
624 *regvar = brcmf_sdiod_regrl(bus->sdiodev,
625 bus->ci->c_inf[idx].base + offset, &ret);
631 w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
633 u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
636 brcmf_sdiod_regwl(bus->sdiodev,
637 bus->ci->c_inf[idx].base + reg_offset,
644 brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on)
646 u8 wr_val = 0, rd_val, cmp_val, bmask;
650 brcmf_dbg(TRACE, "Enter\n");
652 wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
653 /* 1st KSO write goes to AOS wake up core if device is asleep */
654 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
657 brcmf_err("SDIO_AOS KSO write error: %d\n", err);
662 /* device WAKEUP through KSO:
663 * write bit 0 & read back until
664 * both bits 0 (kso bit) & 1 (dev on status) are set
666 cmp_val = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK |
667 SBSDIO_FUNC1_SLEEPCSR_DEVON_MASK;
669 usleep_range(2000, 3000);
671 /* Put device to sleep, turn off KSO */
673 /* only check for bit0, bit1(dev on status) may not
674 * get cleared right away
676 bmask = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK;
680 /* reliable KSO bit set/clr:
681 * the sdiod sleep write access is synced to PMU 32khz clk
682 * just one write attempt may fail,
683 * read it back until it matches written value
685 rd_val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
687 if (((rd_val & bmask) == cmp_val) && !err)
689 brcmf_dbg(SDIO, "KSO wr/rd retry:%d (max: %d) ERR:%x\n",
690 try_cnt, MAX_KSO_ATTEMPTS, err);
692 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
694 } while (try_cnt++ < MAX_KSO_ATTEMPTS);
699 #define PKT_AVAILABLE() (intstatus & I_HMB_FRAME_IND)
701 #define HOSTINTMASK (I_HMB_SW_MASK | I_CHIPACTIVE)
703 /* Turn backplane clock on or off */
704 static int brcmf_sdio_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
707 u8 clkctl, clkreq, devctl;
708 unsigned long timeout;
710 brcmf_dbg(SDIO, "Enter\n");
714 if (bus->sr_enabled) {
715 bus->clkstate = (on ? CLK_AVAIL : CLK_SDONLY);
720 /* Request HT Avail */
722 bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
724 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
727 brcmf_err("HT Avail request error: %d\n", err);
731 /* Check current status */
732 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
733 SBSDIO_FUNC1_CHIPCLKCSR, &err);
735 brcmf_err("HT Avail read error: %d\n", err);
739 /* Go to pending and await interrupt if appropriate */
740 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
741 /* Allow only clock-available interrupt */
742 devctl = brcmf_sdiod_regrb(bus->sdiodev,
743 SBSDIO_DEVICE_CTL, &err);
745 brcmf_err("Devctl error setting CA: %d\n",
750 devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
751 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
753 brcmf_dbg(SDIO, "CLKCTL: set PENDING\n");
754 bus->clkstate = CLK_PENDING;
757 } else if (bus->clkstate == CLK_PENDING) {
758 /* Cancel CA-only interrupt filter */
759 devctl = brcmf_sdiod_regrb(bus->sdiodev,
760 SBSDIO_DEVICE_CTL, &err);
761 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
762 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
766 /* Otherwise, wait here (polling) for HT Avail */
768 msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
769 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
770 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
771 SBSDIO_FUNC1_CHIPCLKCSR,
773 if (time_after(jiffies, timeout))
776 usleep_range(5000, 10000);
779 brcmf_err("HT Avail request error: %d\n", err);
782 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
783 brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n",
784 PMU_MAX_TRANSITION_DLY, clkctl);
788 /* Mark clock available */
789 bus->clkstate = CLK_AVAIL;
790 brcmf_dbg(SDIO, "CLKCTL: turned ON\n");
793 if (!bus->alp_only) {
794 if (SBSDIO_ALPONLY(clkctl))
795 brcmf_err("HT Clock should be on\n");
797 #endif /* defined (DEBUG) */
799 bus->activity = true;
803 if (bus->clkstate == CLK_PENDING) {
804 /* Cancel CA-only interrupt filter */
805 devctl = brcmf_sdiod_regrb(bus->sdiodev,
806 SBSDIO_DEVICE_CTL, &err);
807 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
808 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
812 bus->clkstate = CLK_SDONLY;
813 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
815 brcmf_dbg(SDIO, "CLKCTL: turned OFF\n");
817 brcmf_err("Failed access turning clock off: %d\n",
825 /* Change idle/active SD state */
826 static int brcmf_sdio_sdclk(struct brcmf_sdio *bus, bool on)
828 brcmf_dbg(SDIO, "Enter\n");
831 bus->clkstate = CLK_SDONLY;
833 bus->clkstate = CLK_NONE;
838 /* Transition SD and backplane clock readiness */
839 static int brcmf_sdio_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
842 uint oldstate = bus->clkstate;
845 brcmf_dbg(SDIO, "Enter\n");
847 /* Early exit if we're already there */
848 if (bus->clkstate == target) {
849 if (target == CLK_AVAIL) {
850 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
851 bus->activity = true;
858 /* Make sure SD clock is available */
859 if (bus->clkstate == CLK_NONE)
860 brcmf_sdio_sdclk(bus, true);
861 /* Now request HT Avail on the backplane */
862 brcmf_sdio_htclk(bus, true, pendok);
863 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
864 bus->activity = true;
868 /* Remove HT request, or bring up SD clock */
869 if (bus->clkstate == CLK_NONE)
870 brcmf_sdio_sdclk(bus, true);
871 else if (bus->clkstate == CLK_AVAIL)
872 brcmf_sdio_htclk(bus, false, false);
874 brcmf_err("request for %d -> %d\n",
875 bus->clkstate, target);
876 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
880 /* Make sure to remove HT request */
881 if (bus->clkstate == CLK_AVAIL)
882 brcmf_sdio_htclk(bus, false, false);
883 /* Now remove the SD clock */
884 brcmf_sdio_sdclk(bus, false);
885 brcmf_sdio_wd_timer(bus, 0);
889 brcmf_dbg(SDIO, "%d -> %d\n", oldstate, bus->clkstate);
896 brcmf_sdio_bus_sleep(struct brcmf_sdio *bus, bool sleep, bool pendok)
899 brcmf_dbg(TRACE, "Enter\n");
900 brcmf_dbg(SDIO, "request %s currently %s\n",
901 (sleep ? "SLEEP" : "WAKE"),
902 (bus->sleeping ? "SLEEP" : "WAKE"));
904 /* If SR is enabled control bus state with KSO */
905 if (bus->sr_enabled) {
906 /* Done if we're already in the requested state */
907 if (sleep == bus->sleeping)
912 /* Don't sleep if something is pending */
913 if (atomic_read(&bus->intstatus) ||
914 atomic_read(&bus->ipend) > 0 ||
915 (!atomic_read(&bus->fcstate) &&
916 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
919 err = brcmf_sdio_kso_control(bus, false);
920 /* disable watchdog */
922 brcmf_sdio_wd_timer(bus, 0);
925 err = brcmf_sdio_kso_control(bus, true);
929 bus->sleeping = sleep;
930 brcmf_dbg(SDIO, "new state %s\n",
931 (sleep ? "SLEEP" : "WAKE"));
933 brcmf_err("error while changing bus sleep state %d\n",
942 if (!bus->sr_enabled)
943 brcmf_sdio_clkctl(bus, CLK_NONE, pendok);
945 brcmf_sdio_clkctl(bus, CLK_AVAIL, pendok);
952 static u32 brcmf_sdio_hostmail(struct brcmf_sdio *bus)
959 brcmf_dbg(SDIO, "Enter\n");
961 /* Read mailbox data and ack that we did so */
962 ret = r_sdreg32(bus, &hmb_data,
963 offsetof(struct sdpcmd_regs, tohostmailboxdata));
966 w_sdreg32(bus, SMB_INT_ACK,
967 offsetof(struct sdpcmd_regs, tosbmailbox));
968 bus->sdcnt.f1regdata += 2;
970 /* Dongle recomposed rx frames, accept them again */
971 if (hmb_data & HMB_DATA_NAKHANDLED) {
972 brcmf_dbg(SDIO, "Dongle reports NAK handled, expect rtx of %d\n",
975 brcmf_err("unexpected NAKHANDLED!\n");
978 intstatus |= I_HMB_FRAME_IND;
982 * DEVREADY does not occur with gSPI.
984 if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
986 (hmb_data & HMB_DATA_VERSION_MASK) >>
987 HMB_DATA_VERSION_SHIFT;
988 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
989 brcmf_err("Version mismatch, dongle reports %d, "
991 bus->sdpcm_ver, SDPCM_PROT_VERSION);
993 brcmf_dbg(SDIO, "Dongle ready, protocol version %d\n",
998 * Flow Control has been moved into the RX headers and this out of band
999 * method isn't used any more.
1000 * remaining backward compatible with older dongles.
1002 if (hmb_data & HMB_DATA_FC) {
1003 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
1004 HMB_DATA_FCDATA_SHIFT;
1006 if (fcbits & ~bus->flowcontrol)
1007 bus->sdcnt.fc_xoff++;
1009 if (bus->flowcontrol & ~fcbits)
1010 bus->sdcnt.fc_xon++;
1012 bus->sdcnt.fc_rcvd++;
1013 bus->flowcontrol = fcbits;
1016 /* Shouldn't be any others */
1017 if (hmb_data & ~(HMB_DATA_DEVREADY |
1018 HMB_DATA_NAKHANDLED |
1021 HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
1022 brcmf_err("Unknown mailbox data content: 0x%02x\n",
1028 static void brcmf_sdio_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
1035 brcmf_err("%sterminate frame%s\n",
1036 abort ? "abort command, " : "",
1037 rtx ? ", send NAK" : "");
1040 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
1042 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
1044 bus->sdcnt.f1regdata++;
1046 /* Wait until the packet has been flushed (device/FIFO stable) */
1047 for (lastrbc = retries = 0xffff; retries > 0; retries--) {
1048 hi = brcmf_sdiod_regrb(bus->sdiodev,
1049 SBSDIO_FUNC1_RFRAMEBCHI, &err);
1050 lo = brcmf_sdiod_regrb(bus->sdiodev,
1051 SBSDIO_FUNC1_RFRAMEBCLO, &err);
1052 bus->sdcnt.f1regdata += 2;
1054 if ((hi == 0) && (lo == 0))
1057 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
1058 brcmf_err("count growing: last 0x%04x now 0x%04x\n",
1059 lastrbc, (hi << 8) + lo);
1061 lastrbc = (hi << 8) + lo;
1065 brcmf_err("count never zeroed: last 0x%04x\n", lastrbc);
1067 brcmf_dbg(SDIO, "flush took %d iterations\n", 0xffff - retries);
1071 err = w_sdreg32(bus, SMB_NAK,
1072 offsetof(struct sdpcmd_regs, tosbmailbox));
1074 bus->sdcnt.f1regdata++;
1079 /* Clear partial in any case */
1080 bus->cur_read.len = 0;
1082 /* If we can't reach the device, signal failure */
1084 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
1087 /* return total length of buffer chain */
1088 static uint brcmf_sdio_glom_len(struct brcmf_sdio *bus)
1094 skb_queue_walk(&bus->glom, p)
1099 static void brcmf_sdio_free_glom(struct brcmf_sdio *bus)
1101 struct sk_buff *cur, *next;
1103 skb_queue_walk_safe(&bus->glom, cur, next) {
1104 skb_unlink(cur, &bus->glom);
1105 brcmu_pkt_buf_free_skb(cur);
1110 * brcmfmac sdio bus specific header
1111 * This is the lowest layer header wrapped on the packets transmitted between
1112 * host and WiFi dongle which contains information needed for SDIO core and
1115 * It consists of 3 parts: hardware header, hardware extension header and
1117 * hardware header (frame tag) - 4 bytes
1118 * Byte 0~1: Frame length
1119 * Byte 2~3: Checksum, bit-wise inverse of frame length
1120 * hardware extension header - 8 bytes
1121 * Tx glom mode only, N/A for Rx or normal Tx
1122 * Byte 0~1: Packet length excluding hw frame tag
1124 * Byte 3: Frame flags, bit 0: last frame indication
1125 * Byte 4~5: Reserved
1126 * Byte 6~7: Tail padding length
1127 * software header - 8 bytes
1128 * Byte 0: Rx/Tx sequence number
1129 * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
1130 * Byte 2: Length of next data frame, reserved for Tx
1131 * Byte 3: Data offset
1132 * Byte 4: Flow control bits, reserved for Tx
1133 * Byte 5: Maximum Sequence number allowed by firmware for Tx, N/A for Tx packet
1134 * Byte 6~7: Reserved
1136 #define SDPCM_HWHDR_LEN 4
1137 #define SDPCM_HWEXT_LEN 8
1138 #define SDPCM_SWHDR_LEN 8
1139 #define SDPCM_HDRLEN (SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN)
1140 /* software header */
1141 #define SDPCM_SEQ_MASK 0x000000ff
1142 #define SDPCM_SEQ_WRAP 256
1143 #define SDPCM_CHANNEL_MASK 0x00000f00
1144 #define SDPCM_CHANNEL_SHIFT 8
1145 #define SDPCM_CONTROL_CHANNEL 0 /* Control */
1146 #define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication */
1147 #define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv */
1148 #define SDPCM_GLOM_CHANNEL 3 /* Coalesced packets */
1149 #define SDPCM_TEST_CHANNEL 15 /* Test/debug packets */
1150 #define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80)
1151 #define SDPCM_NEXTLEN_MASK 0x00ff0000
1152 #define SDPCM_NEXTLEN_SHIFT 16
1153 #define SDPCM_DOFFSET_MASK 0xff000000
1154 #define SDPCM_DOFFSET_SHIFT 24
1155 #define SDPCM_FCMASK_MASK 0x000000ff
1156 #define SDPCM_WINDOW_MASK 0x0000ff00
1157 #define SDPCM_WINDOW_SHIFT 8
1159 static inline u8 brcmf_sdio_getdatoffset(u8 *swheader)
1162 hdrvalue = *(u32 *)swheader;
1163 return (u8)((hdrvalue & SDPCM_DOFFSET_MASK) >> SDPCM_DOFFSET_SHIFT);
1166 static int brcmf_sdio_hdparse(struct brcmf_sdio *bus, u8 *header,
1167 struct brcmf_sdio_hdrinfo *rd,
1168 enum brcmf_sdio_frmtype type)
1171 u8 rx_seq, fc, tx_seq_max;
1174 trace_brcmf_sdpcm_hdr(SDPCM_RX, header);
1177 len = get_unaligned_le16(header);
1178 checksum = get_unaligned_le16(header + sizeof(u16));
1179 /* All zero means no more to read */
1180 if (!(len | checksum)) {
1181 bus->rxpending = false;
1184 if ((u16)(~(len ^ checksum))) {
1185 brcmf_err("HW header checksum error\n");
1186 bus->sdcnt.rx_badhdr++;
1187 brcmf_sdio_rxfail(bus, false, false);
1190 if (len < SDPCM_HDRLEN) {
1191 brcmf_err("HW header length error\n");
1194 if (type == BRCMF_SDIO_FT_SUPER &&
1195 (roundup(len, bus->blocksize) != rd->len)) {
1196 brcmf_err("HW superframe header length error\n");
1199 if (type == BRCMF_SDIO_FT_SUB && len > rd->len) {
1200 brcmf_err("HW subframe header length error\n");
1205 /* software header */
1206 header += SDPCM_HWHDR_LEN;
1207 swheader = le32_to_cpu(*(__le32 *)header);
1208 if (type == BRCMF_SDIO_FT_SUPER && SDPCM_GLOMDESC(header)) {
1209 brcmf_err("Glom descriptor found in superframe head\n");
1213 rx_seq = (u8)(swheader & SDPCM_SEQ_MASK);
1214 rd->channel = (swheader & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT;
1215 if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
1216 type != BRCMF_SDIO_FT_SUPER) {
1217 brcmf_err("HW header length too long\n");
1218 bus->sdcnt.rx_toolong++;
1219 brcmf_sdio_rxfail(bus, false, false);
1223 if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) {
1224 brcmf_err("Wrong channel for superframe\n");
1228 if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL &&
1229 rd->channel != SDPCM_EVENT_CHANNEL) {
1230 brcmf_err("Wrong channel for subframe\n");
1234 rd->dat_offset = brcmf_sdio_getdatoffset(header);
1235 if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
1236 brcmf_err("seq %d: bad data offset\n", rx_seq);
1237 bus->sdcnt.rx_badhdr++;
1238 brcmf_sdio_rxfail(bus, false, false);
1242 if (rd->seq_num != rx_seq) {
1243 brcmf_err("seq %d: sequence number error, expect %d\n",
1244 rx_seq, rd->seq_num);
1245 bus->sdcnt.rx_badseq++;
1246 rd->seq_num = rx_seq;
1248 /* no need to check the reset for subframe */
1249 if (type == BRCMF_SDIO_FT_SUB)
1251 rd->len_nxtfrm = (swheader & SDPCM_NEXTLEN_MASK) >> SDPCM_NEXTLEN_SHIFT;
1252 if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
1253 /* only warm for NON glom packet */
1254 if (rd->channel != SDPCM_GLOM_CHANNEL)
1255 brcmf_err("seq %d: next length error\n", rx_seq);
1258 swheader = le32_to_cpu(*(__le32 *)(header + 4));
1259 fc = swheader & SDPCM_FCMASK_MASK;
1260 if (bus->flowcontrol != fc) {
1261 if (~bus->flowcontrol & fc)
1262 bus->sdcnt.fc_xoff++;
1263 if (bus->flowcontrol & ~fc)
1264 bus->sdcnt.fc_xon++;
1265 bus->sdcnt.fc_rcvd++;
1266 bus->flowcontrol = fc;
1268 tx_seq_max = (swheader & SDPCM_WINDOW_MASK) >> SDPCM_WINDOW_SHIFT;
1269 if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
1270 brcmf_err("seq %d: max tx seq number error\n", rx_seq);
1271 tx_seq_max = bus->tx_seq + 2;
1273 bus->tx_max = tx_seq_max;
1278 static inline void brcmf_sdio_update_hwhdr(u8 *header, u16 frm_length)
1280 *(__le16 *)header = cpu_to_le16(frm_length);
1281 *(((__le16 *)header) + 1) = cpu_to_le16(~frm_length);
1284 static void brcmf_sdio_hdpack(struct brcmf_sdio *bus, u8 *header,
1285 struct brcmf_sdio_hdrinfo *hd_info)
1290 brcmf_sdio_update_hwhdr(header, hd_info->len);
1291 hdr_offset = SDPCM_HWHDR_LEN;
1294 hdrval = (hd_info->len - hdr_offset) | (hd_info->lastfrm << 24);
1295 *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval);
1296 hdrval = (u16)hd_info->tail_pad << 16;
1297 *(((__le32 *)(header + hdr_offset)) + 1) = cpu_to_le32(hdrval);
1298 hdr_offset += SDPCM_HWEXT_LEN;
1301 hdrval = hd_info->seq_num;
1302 hdrval |= (hd_info->channel << SDPCM_CHANNEL_SHIFT) &
1304 hdrval |= (hd_info->dat_offset << SDPCM_DOFFSET_SHIFT) &
1306 *((__le32 *)(header + hdr_offset)) = cpu_to_le32(hdrval);
1307 *(((__le32 *)(header + hdr_offset)) + 1) = 0;
1308 trace_brcmf_sdpcm_hdr(SDPCM_TX + !!(bus->txglom), header);
1311 static u8 brcmf_sdio_rxglom(struct brcmf_sdio *bus, u8 rxseq)
1316 struct sk_buff *pfirst, *pnext;
1321 struct brcmf_sdio_hdrinfo rd_new;
1323 /* If packets, issue read(s) and send up packet chain */
1324 /* Return sequence numbers consumed? */
1326 brcmf_dbg(SDIO, "start: glomd %p glom %p\n",
1327 bus->glomd, skb_peek(&bus->glom));
1329 /* If there's a descriptor, generate the packet chain */
1331 pfirst = pnext = NULL;
1332 dlen = (u16) (bus->glomd->len);
1333 dptr = bus->glomd->data;
1334 if (!dlen || (dlen & 1)) {
1335 brcmf_err("bad glomd len(%d), ignore descriptor\n",
1340 for (totlen = num = 0; dlen; num++) {
1341 /* Get (and move past) next length */
1342 sublen = get_unaligned_le16(dptr);
1343 dlen -= sizeof(u16);
1344 dptr += sizeof(u16);
1345 if ((sublen < SDPCM_HDRLEN) ||
1346 ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1347 brcmf_err("descriptor len %d bad: %d\n",
1352 if (sublen % bus->sgentry_align) {
1353 brcmf_err("sublen %d not multiple of %d\n",
1354 sublen, bus->sgentry_align);
1358 /* For last frame, adjust read len so total
1359 is a block multiple */
1362 (roundup(totlen, bus->blocksize) - totlen);
1363 totlen = roundup(totlen, bus->blocksize);
1366 /* Allocate/chain packet for next subframe */
1367 pnext = brcmu_pkt_buf_get_skb(sublen + bus->sgentry_align);
1368 if (pnext == NULL) {
1369 brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
1373 skb_queue_tail(&bus->glom, pnext);
1375 /* Adhere to start alignment requirements */
1376 pkt_align(pnext, sublen, bus->sgentry_align);
1379 /* If all allocations succeeded, save packet chain
1382 brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1384 if (BRCMF_GLOM_ON() && bus->cur_read.len &&
1385 totlen != bus->cur_read.len) {
1386 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1387 bus->cur_read.len, totlen, rxseq);
1389 pfirst = pnext = NULL;
1391 brcmf_sdio_free_glom(bus);
1395 /* Done with descriptor packet */
1396 brcmu_pkt_buf_free_skb(bus->glomd);
1398 bus->cur_read.len = 0;
1401 /* Ok -- either we just generated a packet chain,
1402 or had one from before */
1403 if (!skb_queue_empty(&bus->glom)) {
1404 if (BRCMF_GLOM_ON()) {
1405 brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
1406 skb_queue_walk(&bus->glom, pnext) {
1407 brcmf_dbg(GLOM, " %p: %p len 0x%04x (%d)\n",
1408 pnext, (u8 *) (pnext->data),
1409 pnext->len, pnext->len);
1413 pfirst = skb_peek(&bus->glom);
1414 dlen = (u16) brcmf_sdio_glom_len(bus);
1416 /* Do an SDIO read for the superframe. Configurable iovar to
1417 * read directly into the chained packet, or allocate a large
1418 * packet and and copy into the chain.
1420 sdio_claim_host(bus->sdiodev->func[1]);
1421 errcode = brcmf_sdiod_recv_chain(bus->sdiodev,
1423 sdio_release_host(bus->sdiodev->func[1]);
1424 bus->sdcnt.f2rxdata++;
1426 /* On failure, kill the superframe, allow a couple retries */
1428 brcmf_err("glom read of %d bytes failed: %d\n",
1431 sdio_claim_host(bus->sdiodev->func[1]);
1432 if (bus->glomerr++ < 3) {
1433 brcmf_sdio_rxfail(bus, true, true);
1436 brcmf_sdio_rxfail(bus, true, false);
1437 bus->sdcnt.rxglomfail++;
1438 brcmf_sdio_free_glom(bus);
1440 sdio_release_host(bus->sdiodev->func[1]);
1444 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1445 pfirst->data, min_t(int, pfirst->len, 48),
1448 rd_new.seq_num = rxseq;
1450 sdio_claim_host(bus->sdiodev->func[1]);
1451 errcode = brcmf_sdio_hdparse(bus, pfirst->data, &rd_new,
1452 BRCMF_SDIO_FT_SUPER);
1453 sdio_release_host(bus->sdiodev->func[1]);
1454 bus->cur_read.len = rd_new.len_nxtfrm << 4;
1456 /* Remove superframe header, remember offset */
1457 skb_pull(pfirst, rd_new.dat_offset);
1458 sfdoff = rd_new.dat_offset;
1461 /* Validate all the subframe headers */
1462 skb_queue_walk(&bus->glom, pnext) {
1463 /* leave when invalid subframe is found */
1467 rd_new.len = pnext->len;
1468 rd_new.seq_num = rxseq++;
1469 sdio_claim_host(bus->sdiodev->func[1]);
1470 errcode = brcmf_sdio_hdparse(bus, pnext->data, &rd_new,
1472 sdio_release_host(bus->sdiodev->func[1]);
1473 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1474 pnext->data, 32, "subframe:\n");
1480 /* Terminate frame on error, request
1482 sdio_claim_host(bus->sdiodev->func[1]);
1483 if (bus->glomerr++ < 3) {
1484 /* Restore superframe header space */
1485 skb_push(pfirst, sfdoff);
1486 brcmf_sdio_rxfail(bus, true, true);
1489 brcmf_sdio_rxfail(bus, true, false);
1490 bus->sdcnt.rxglomfail++;
1491 brcmf_sdio_free_glom(bus);
1493 sdio_release_host(bus->sdiodev->func[1]);
1494 bus->cur_read.len = 0;
1498 /* Basic SD framing looks ok - process each packet (header) */
1500 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
1501 dptr = (u8 *) (pfirst->data);
1502 sublen = get_unaligned_le16(dptr);
1503 doff = brcmf_sdio_getdatoffset(&dptr[SDPCM_HWHDR_LEN]);
1505 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1507 "Rx Subframe Data:\n");
1509 __skb_trim(pfirst, sublen);
1510 skb_pull(pfirst, doff);
1512 if (pfirst->len == 0) {
1513 skb_unlink(pfirst, &bus->glom);
1514 brcmu_pkt_buf_free_skb(pfirst);
1518 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1520 min_t(int, pfirst->len, 32),
1521 "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1522 bus->glom.qlen, pfirst, pfirst->data,
1523 pfirst->len, pfirst->next,
1525 skb_unlink(pfirst, &bus->glom);
1526 brcmf_rx_frame(bus->sdiodev->dev, pfirst);
1527 bus->sdcnt.rxglompkts++;
1530 bus->sdcnt.rxglomframes++;
1535 static int brcmf_sdio_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
1538 DECLARE_WAITQUEUE(wait, current);
1539 int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT);
1541 /* Wait until control frame is available */
1542 add_wait_queue(&bus->dcmd_resp_wait, &wait);
1543 set_current_state(TASK_INTERRUPTIBLE);
1545 while (!(*condition) && (!signal_pending(current) && timeout))
1546 timeout = schedule_timeout(timeout);
1548 if (signal_pending(current))
1551 set_current_state(TASK_RUNNING);
1552 remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1557 static int brcmf_sdio_dcmd_resp_wake(struct brcmf_sdio *bus)
1559 if (waitqueue_active(&bus->dcmd_resp_wait))
1560 wake_up_interruptible(&bus->dcmd_resp_wait);
1565 brcmf_sdio_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
1568 u8 *buf = NULL, *rbuf;
1571 brcmf_dbg(TRACE, "Enter\n");
1574 buf = vzalloc(bus->rxblen);
1579 pad = ((unsigned long)rbuf % bus->head_align);
1581 rbuf += (bus->head_align - pad);
1583 /* Copy the already-read portion over */
1584 memcpy(buf, hdr, BRCMF_FIRSTREAD);
1585 if (len <= BRCMF_FIRSTREAD)
1588 /* Raise rdlen to next SDIO block to avoid tail command */
1589 rdlen = len - BRCMF_FIRSTREAD;
1590 if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1591 pad = bus->blocksize - (rdlen % bus->blocksize);
1592 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1593 ((len + pad) < bus->sdiodev->bus_if->maxctl))
1595 } else if (rdlen % bus->head_align) {
1596 rdlen += bus->head_align - (rdlen % bus->head_align);
1599 /* Drop if the read is too big or it exceeds our maximum */
1600 if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
1601 brcmf_err("%d-byte control read exceeds %d-byte buffer\n",
1602 rdlen, bus->sdiodev->bus_if->maxctl);
1603 brcmf_sdio_rxfail(bus, false, false);
1607 if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
1608 brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
1609 len, len - doff, bus->sdiodev->bus_if->maxctl);
1610 bus->sdcnt.rx_toolong++;
1611 brcmf_sdio_rxfail(bus, false, false);
1615 /* Read remain of frame body */
1616 sdret = brcmf_sdiod_recv_buf(bus->sdiodev, rbuf, rdlen);
1617 bus->sdcnt.f2rxdata++;
1619 /* Control frame failures need retransmission */
1621 brcmf_err("read %d control bytes failed: %d\n",
1623 bus->sdcnt.rxc_errors++;
1624 brcmf_sdio_rxfail(bus, true, true);
1627 memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen);
1631 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
1632 buf, len, "RxCtrl:\n");
1634 /* Point to valid data and indicate its length */
1635 spin_lock_bh(&bus->rxctl_lock);
1637 brcmf_err("last control frame is being processed.\n");
1638 spin_unlock_bh(&bus->rxctl_lock);
1642 bus->rxctl = buf + doff;
1643 bus->rxctl_orig = buf;
1644 bus->rxlen = len - doff;
1645 spin_unlock_bh(&bus->rxctl_lock);
1648 /* Awake any waiters */
1649 brcmf_sdio_dcmd_resp_wake(bus);
1652 /* Pad read to blocksize for efficiency */
1653 static void brcmf_sdio_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
1655 if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1656 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1657 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1658 *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1660 } else if (*rdlen % bus->head_align) {
1661 *rdlen += bus->head_align - (*rdlen % bus->head_align);
1665 static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
1667 struct sk_buff *pkt; /* Packet for event or data frames */
1668 u16 pad; /* Number of pad bytes to read */
1669 uint rxleft = 0; /* Remaining number of frames allowed */
1670 int ret; /* Return code from calls */
1671 uint rxcount = 0; /* Total frames read */
1672 struct brcmf_sdio_hdrinfo *rd = &bus->cur_read, rd_new;
1675 brcmf_dbg(TRACE, "Enter\n");
1677 /* Not finished unless we encounter no more frames indication */
1678 bus->rxpending = true;
1680 for (rd->seq_num = bus->rx_seq, rxleft = maxframes;
1681 !bus->rxskip && rxleft &&
1682 bus->sdiodev->bus_if->state != BRCMF_BUS_DOWN;
1683 rd->seq_num++, rxleft--) {
1685 /* Handle glomming separately */
1686 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
1688 brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
1689 bus->glomd, skb_peek(&bus->glom));
1690 cnt = brcmf_sdio_rxglom(bus, rd->seq_num);
1691 brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1692 rd->seq_num += cnt - 1;
1693 rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1697 rd->len_left = rd->len;
1698 /* read header first for unknow frame length */
1699 sdio_claim_host(bus->sdiodev->func[1]);
1701 ret = brcmf_sdiod_recv_buf(bus->sdiodev,
1702 bus->rxhdr, BRCMF_FIRSTREAD);
1703 bus->sdcnt.f2rxhdrs++;
1705 brcmf_err("RXHEADER FAILED: %d\n",
1707 bus->sdcnt.rx_hdrfail++;
1708 brcmf_sdio_rxfail(bus, true, true);
1709 sdio_release_host(bus->sdiodev->func[1]);
1713 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
1714 bus->rxhdr, SDPCM_HDRLEN,
1717 if (brcmf_sdio_hdparse(bus, bus->rxhdr, rd,
1718 BRCMF_SDIO_FT_NORMAL)) {
1719 sdio_release_host(bus->sdiodev->func[1]);
1720 if (!bus->rxpending)
1726 if (rd->channel == SDPCM_CONTROL_CHANNEL) {
1727 brcmf_sdio_read_control(bus, bus->rxhdr,
1730 /* prepare the descriptor for the next read */
1731 rd->len = rd->len_nxtfrm << 4;
1733 /* treat all packet as event if we don't know */
1734 rd->channel = SDPCM_EVENT_CHANNEL;
1735 sdio_release_host(bus->sdiodev->func[1]);
1738 rd->len_left = rd->len > BRCMF_FIRSTREAD ?
1739 rd->len - BRCMF_FIRSTREAD : 0;
1740 head_read = BRCMF_FIRSTREAD;
1743 brcmf_sdio_pad(bus, &pad, &rd->len_left);
1745 pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read +
1748 /* Give up on data, request rtx of events */
1749 brcmf_err("brcmu_pkt_buf_get_skb failed\n");
1750 brcmf_sdio_rxfail(bus, false,
1751 RETRYCHAN(rd->channel));
1752 sdio_release_host(bus->sdiodev->func[1]);
1755 skb_pull(pkt, head_read);
1756 pkt_align(pkt, rd->len_left, bus->head_align);
1758 ret = brcmf_sdiod_recv_pkt(bus->sdiodev, pkt);
1759 bus->sdcnt.f2rxdata++;
1760 sdio_release_host(bus->sdiodev->func[1]);
1763 brcmf_err("read %d bytes from channel %d failed: %d\n",
1764 rd->len, rd->channel, ret);
1765 brcmu_pkt_buf_free_skb(pkt);
1766 sdio_claim_host(bus->sdiodev->func[1]);
1767 brcmf_sdio_rxfail(bus, true,
1768 RETRYCHAN(rd->channel));
1769 sdio_release_host(bus->sdiodev->func[1]);
1774 skb_push(pkt, head_read);
1775 memcpy(pkt->data, bus->rxhdr, head_read);
1778 memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
1779 rd_new.seq_num = rd->seq_num;
1780 sdio_claim_host(bus->sdiodev->func[1]);
1781 if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new,
1782 BRCMF_SDIO_FT_NORMAL)) {
1784 brcmu_pkt_buf_free_skb(pkt);
1786 bus->sdcnt.rx_readahead_cnt++;
1787 if (rd->len != roundup(rd_new.len, 16)) {
1788 brcmf_err("frame length mismatch:read %d, should be %d\n",
1790 roundup(rd_new.len, 16) >> 4);
1792 brcmf_sdio_rxfail(bus, true, true);
1793 sdio_release_host(bus->sdiodev->func[1]);
1794 brcmu_pkt_buf_free_skb(pkt);
1797 sdio_release_host(bus->sdiodev->func[1]);
1798 rd->len_nxtfrm = rd_new.len_nxtfrm;
1799 rd->channel = rd_new.channel;
1800 rd->dat_offset = rd_new.dat_offset;
1802 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1805 bus->rxhdr, SDPCM_HDRLEN,
1808 if (rd_new.channel == SDPCM_CONTROL_CHANNEL) {
1809 brcmf_err("readahead on control packet %d?\n",
1811 /* Force retry w/normal header read */
1813 sdio_claim_host(bus->sdiodev->func[1]);
1814 brcmf_sdio_rxfail(bus, false, true);
1815 sdio_release_host(bus->sdiodev->func[1]);
1816 brcmu_pkt_buf_free_skb(pkt);
1821 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1822 pkt->data, rd->len, "Rx Data:\n");
1824 /* Save superframe descriptor and allocate packet frame */
1825 if (rd->channel == SDPCM_GLOM_CHANNEL) {
1826 if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_HWHDR_LEN])) {
1827 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
1829 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1832 __skb_trim(pkt, rd->len);
1833 skb_pull(pkt, SDPCM_HDRLEN);
1836 brcmf_err("%s: glom superframe w/o "
1837 "descriptor!\n", __func__);
1838 sdio_claim_host(bus->sdiodev->func[1]);
1839 brcmf_sdio_rxfail(bus, false, false);
1840 sdio_release_host(bus->sdiodev->func[1]);
1842 /* prepare the descriptor for the next read */
1843 rd->len = rd->len_nxtfrm << 4;
1845 /* treat all packet as event if we don't know */
1846 rd->channel = SDPCM_EVENT_CHANNEL;
1850 /* Fill in packet len and prio, deliver upward */
1851 __skb_trim(pkt, rd->len);
1852 skb_pull(pkt, rd->dat_offset);
1854 /* prepare the descriptor for the next read */
1855 rd->len = rd->len_nxtfrm << 4;
1857 /* treat all packet as event if we don't know */
1858 rd->channel = SDPCM_EVENT_CHANNEL;
1860 if (pkt->len == 0) {
1861 brcmu_pkt_buf_free_skb(pkt);
1865 brcmf_rx_frame(bus->sdiodev->dev, pkt);
1868 rxcount = maxframes - rxleft;
1869 /* Message if we hit the limit */
1871 brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes);
1873 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
1874 /* Back off rxseq if awaiting rtx, update rx_seq */
1877 bus->rx_seq = rd->seq_num;
1883 brcmf_sdio_wait_event_wakeup(struct brcmf_sdio *bus)
1885 if (waitqueue_active(&bus->ctrl_wait))
1886 wake_up_interruptible(&bus->ctrl_wait);
1890 static int brcmf_sdio_txpkt_hdalign(struct brcmf_sdio *bus, struct sk_buff *pkt)
1895 dat_buf = (u8 *)(pkt->data);
1897 /* Check head padding */
1898 head_pad = ((unsigned long)dat_buf % bus->head_align);
1900 if (skb_headroom(pkt) < head_pad) {
1901 bus->sdiodev->bus_if->tx_realloc++;
1903 if (skb_cow(pkt, head_pad))
1906 skb_push(pkt, head_pad);
1907 dat_buf = (u8 *)(pkt->data);
1908 memset(dat_buf, 0, head_pad + bus->tx_hdrlen);
1914 * struct brcmf_skbuff_cb reserves first two bytes in sk_buff::cb for
1917 /* flag marking a dummy skb added for DMA alignment requirement */
1918 #define ALIGN_SKB_FLAG 0x8000
1919 /* bit mask of data length chopped from the previous packet */
1920 #define ALIGN_SKB_CHOP_LEN_MASK 0x7fff
1922 static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus,
1923 struct sk_buff_head *pktq,
1924 struct sk_buff *pkt, u16 total_len)
1926 struct brcmf_sdio_dev *sdiodev;
1927 struct sk_buff *pkt_pad;
1928 u16 tail_pad, tail_chop, chain_pad;
1929 unsigned int blksize;
1933 sdiodev = bus->sdiodev;
1934 blksize = sdiodev->func[SDIO_FUNC_2]->cur_blksize;
1935 /* sg entry alignment should be a divisor of block size */
1936 WARN_ON(blksize % bus->sgentry_align);
1938 /* Check tail padding */
1939 lastfrm = skb_queue_is_last(pktq, pkt);
1941 tail_chop = pkt->len % bus->sgentry_align;
1943 tail_pad = bus->sgentry_align - tail_chop;
1944 chain_pad = (total_len + tail_pad) % blksize;
1945 if (lastfrm && chain_pad)
1946 tail_pad += blksize - chain_pad;
1947 if (skb_tailroom(pkt) < tail_pad && pkt->len > blksize) {
1948 pkt_pad = bus->txglom_sgpad;
1949 if (pkt_pad == NULL)
1950 brcmu_pkt_buf_get_skb(tail_pad + tail_chop);
1951 if (pkt_pad == NULL)
1953 ret = brcmf_sdio_txpkt_hdalign(bus, pkt_pad);
1954 if (unlikely(ret < 0))
1956 memcpy(pkt_pad->data,
1957 pkt->data + pkt->len - tail_chop,
1959 *(u32 *)(pkt_pad->cb) = ALIGN_SKB_FLAG + tail_chop;
1960 skb_trim(pkt, pkt->len - tail_chop);
1961 __skb_queue_after(pktq, pkt, pkt_pad);
1963 ntail = pkt->data_len + tail_pad -
1964 (pkt->end - pkt->tail);
1965 if (skb_cloned(pkt) || ntail > 0)
1966 if (pskb_expand_head(pkt, 0, ntail, GFP_ATOMIC))
1968 if (skb_linearize(pkt))
1970 __skb_put(pkt, tail_pad);
1977 * brcmf_sdio_txpkt_prep - packet preparation for transmit
1978 * @bus: brcmf_sdio structure pointer
1979 * @pktq: packet list pointer
1980 * @chan: virtual channel to transmit the packet
1982 * Processes to be applied to the packet
1983 * - Align data buffer pointer
1984 * - Align data buffer length
1986 * Return: negative value if there is error
1989 brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
1992 u16 head_pad, total_len;
1993 struct sk_buff *pkt_next;
1996 struct brcmf_sdio_hdrinfo hd_info = {0};
1998 txseq = bus->tx_seq;
2000 skb_queue_walk(pktq, pkt_next) {
2001 /* alignment packet inserted in previous
2002 * loop cycle can be skipped as it is
2003 * already properly aligned and does not
2004 * need an sdpcm header.
2006 if (*(u32 *)(pkt_next->cb) & ALIGN_SKB_FLAG)
2009 /* align packet data pointer */
2010 ret = brcmf_sdio_txpkt_hdalign(bus, pkt_next);
2013 head_pad = (u16)ret;
2015 memset(pkt_next->data, 0, head_pad + bus->tx_hdrlen);
2017 total_len += pkt_next->len;
2019 hd_info.len = pkt_next->len;
2020 hd_info.lastfrm = skb_queue_is_last(pktq, pkt_next);
2021 if (bus->txglom && pktq->qlen > 1) {
2022 ret = brcmf_sdio_txpkt_prep_sg(bus, pktq,
2023 pkt_next, total_len);
2026 hd_info.tail_pad = (u16)ret;
2027 total_len += (u16)ret;
2030 hd_info.channel = chan;
2031 hd_info.dat_offset = head_pad + bus->tx_hdrlen;
2032 hd_info.seq_num = txseq++;
2034 /* Now fill the header */
2035 brcmf_sdio_hdpack(bus, pkt_next->data, &hd_info);
2037 if (BRCMF_BYTES_ON() &&
2038 ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
2039 (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)))
2040 brcmf_dbg_hex_dump(true, pkt_next, hd_info.len,
2042 else if (BRCMF_HDRS_ON())
2043 brcmf_dbg_hex_dump(true, pkt_next,
2044 head_pad + bus->tx_hdrlen,
2047 /* Hardware length tag of the first packet should be total
2048 * length of the chain (including padding)
2051 brcmf_sdio_update_hwhdr(pktq->next->data, total_len);
2056 * brcmf_sdio_txpkt_postp - packet post processing for transmit
2057 * @bus: brcmf_sdio structure pointer
2058 * @pktq: packet list pointer
2060 * Processes to be applied to the packet
2061 * - Remove head padding
2062 * - Remove tail padding
2065 brcmf_sdio_txpkt_postp(struct brcmf_sdio *bus, struct sk_buff_head *pktq)
2070 u32 dummy_flags, chop_len;
2071 struct sk_buff *pkt_next, *tmp, *pkt_prev;
2073 skb_queue_walk_safe(pktq, pkt_next, tmp) {
2074 dummy_flags = *(u32 *)(pkt_next->cb);
2075 if (dummy_flags & ALIGN_SKB_FLAG) {
2076 chop_len = dummy_flags & ALIGN_SKB_CHOP_LEN_MASK;
2078 pkt_prev = pkt_next->prev;
2079 skb_put(pkt_prev, chop_len);
2081 __skb_unlink(pkt_next, pktq);
2082 brcmu_pkt_buf_free_skb(pkt_next);
2084 hdr = pkt_next->data + bus->tx_hdrlen - SDPCM_SWHDR_LEN;
2085 dat_offset = le32_to_cpu(*(__le32 *)hdr);
2086 dat_offset = (dat_offset & SDPCM_DOFFSET_MASK) >>
2087 SDPCM_DOFFSET_SHIFT;
2088 skb_pull(pkt_next, dat_offset);
2090 tail_pad = le16_to_cpu(*(__le16 *)(hdr - 2));
2091 skb_trim(pkt_next, pkt_next->len - tail_pad);
2097 /* Writes a HW/SW header into the packet and sends it. */
2098 /* Assumes: (a) header space already there, (b) caller holds lock */
2099 static int brcmf_sdio_txpkt(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
2104 struct sk_buff *pkt_next, *tmp;
2106 brcmf_dbg(TRACE, "Enter\n");
2108 ret = brcmf_sdio_txpkt_prep(bus, pktq, chan);
2112 sdio_claim_host(bus->sdiodev->func[1]);
2113 ret = brcmf_sdiod_send_pkt(bus->sdiodev, pktq);
2114 bus->sdcnt.f2txdata++;
2117 /* On failure, abort the command and terminate the frame */
2118 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2120 bus->sdcnt.tx_sderrs++;
2122 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
2123 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2125 bus->sdcnt.f1regdata++;
2127 for (i = 0; i < 3; i++) {
2129 hi = brcmf_sdiod_regrb(bus->sdiodev,
2130 SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2131 lo = brcmf_sdiod_regrb(bus->sdiodev,
2132 SBSDIO_FUNC1_WFRAMEBCLO, NULL);
2133 bus->sdcnt.f1regdata += 2;
2134 if ((hi == 0) && (lo == 0))
2138 sdio_release_host(bus->sdiodev->func[1]);
2141 brcmf_sdio_txpkt_postp(bus, pktq);
2143 bus->tx_seq = (bus->tx_seq + pktq->qlen) % SDPCM_SEQ_WRAP;
2144 skb_queue_walk_safe(pktq, pkt_next, tmp) {
2145 __skb_unlink(pkt_next, pktq);
2146 brcmf_txcomplete(bus->sdiodev->dev, pkt_next, ret == 0);
2151 static uint brcmf_sdio_sendfromq(struct brcmf_sdio *bus, uint maxframes)
2153 struct sk_buff *pkt;
2154 struct sk_buff_head pktq;
2156 int ret = 0, prec_out, i;
2158 u8 tx_prec_map, pkt_num;
2160 brcmf_dbg(TRACE, "Enter\n");
2162 tx_prec_map = ~bus->flowcontrol;
2164 /* Send frames until the limit or some other event */
2165 for (cnt = 0; (cnt < maxframes) && data_ok(bus);) {
2167 __skb_queue_head_init(&pktq);
2169 pkt_num = min_t(u8, bus->tx_max - bus->tx_seq,
2170 brcmf_sdio_txglomsz);
2171 pkt_num = min_t(u32, pkt_num,
2172 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol));
2173 spin_lock_bh(&bus->txqlock);
2174 for (i = 0; i < pkt_num; i++) {
2175 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map,
2179 __skb_queue_tail(&pktq, pkt);
2181 spin_unlock_bh(&bus->txqlock);
2185 ret = brcmf_sdio_txpkt(bus, &pktq, SDPCM_DATA_CHANNEL);
2188 /* In poll mode, need to check for other events */
2189 if (!bus->intr && cnt) {
2190 /* Check device status, signal pending interrupt */
2191 sdio_claim_host(bus->sdiodev->func[1]);
2192 ret = r_sdreg32(bus, &intstatus,
2193 offsetof(struct sdpcmd_regs,
2195 sdio_release_host(bus->sdiodev->func[1]);
2196 bus->sdcnt.f2txdata++;
2199 if (intstatus & bus->hostintmask)
2200 atomic_set(&bus->ipend, 1);
2204 /* Deflow-control stack if needed */
2205 if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) &&
2206 bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
2208 brcmf_txflowblock(bus->sdiodev->dev, false);
2214 static void brcmf_sdio_bus_stop(struct device *dev)
2216 u32 local_hostintmask;
2219 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2220 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2221 struct brcmf_sdio *bus = sdiodev->bus;
2223 brcmf_dbg(TRACE, "Enter\n");
2225 if (bus->watchdog_tsk) {
2226 send_sig(SIGTERM, bus->watchdog_tsk, 1);
2227 kthread_stop(bus->watchdog_tsk);
2228 bus->watchdog_tsk = NULL;
2231 sdio_claim_host(bus->sdiodev->func[1]);
2233 /* Enable clock for device interrupts */
2234 brcmf_sdio_bus_sleep(bus, false, false);
2236 /* Disable and clear interrupts at the chip level also */
2237 w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask));
2238 local_hostintmask = bus->hostintmask;
2239 bus->hostintmask = 0;
2241 /* Change our idea of bus state */
2242 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2244 /* Force clocks on backplane to be sure F2 interrupt propagates */
2245 saveclk = brcmf_sdiod_regrb(bus->sdiodev,
2246 SBSDIO_FUNC1_CHIPCLKCSR, &err);
2248 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2249 (saveclk | SBSDIO_FORCE_HT), &err);
2252 brcmf_err("Failed to force clock for F2: err %d\n", err);
2254 /* Turn off the bus (F2), free any pending packets */
2255 brcmf_dbg(INTR, "disable SDIO interrupts\n");
2256 sdio_disable_func(bus->sdiodev->func[SDIO_FUNC_2]);
2258 /* Clear any pending interrupts now that F2 is disabled */
2259 w_sdreg32(bus, local_hostintmask,
2260 offsetof(struct sdpcmd_regs, intstatus));
2262 /* Turn off the backplane clock (only) */
2263 brcmf_sdio_clkctl(bus, CLK_SDONLY, false);
2264 sdio_release_host(bus->sdiodev->func[1]);
2266 /* Clear the data packet queues */
2267 brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
2269 /* Clear any held glomming stuff */
2271 brcmu_pkt_buf_free_skb(bus->glomd);
2272 brcmf_sdio_free_glom(bus);
2274 /* Clear rx control and wake any waiters */
2275 spin_lock_bh(&bus->rxctl_lock);
2277 spin_unlock_bh(&bus->rxctl_lock);
2278 brcmf_sdio_dcmd_resp_wake(bus);
2280 /* Reset some F2 state stuff */
2281 bus->rxskip = false;
2282 bus->tx_seq = bus->rx_seq = 0;
2285 static inline void brcmf_sdio_clrintr(struct brcmf_sdio *bus)
2287 unsigned long flags;
2289 if (bus->sdiodev->oob_irq_requested) {
2290 spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags);
2291 if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) {
2292 enable_irq(bus->sdiodev->pdata->oob_irq_nr);
2293 bus->sdiodev->irq_en = true;
2295 spin_unlock_irqrestore(&bus->sdiodev->irq_en_lock, flags);
2299 static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus)
2306 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
2307 addr = bus->ci->c_inf[idx].base +
2308 offsetof(struct sdpcmd_regs, intstatus);
2310 val = brcmf_sdiod_regrl(bus->sdiodev, addr, &ret);
2311 bus->sdcnt.f1regdata++;
2315 val &= bus->hostintmask;
2316 atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE));
2318 /* Clear interrupts */
2320 brcmf_sdiod_regwl(bus->sdiodev, addr, val, &ret);
2321 bus->sdcnt.f1regdata++;
2325 atomic_set(&bus->intstatus, 0);
2327 for_each_set_bit(n, &val, 32)
2328 set_bit(n, (unsigned long *)&bus->intstatus.counter);
2334 static void brcmf_sdio_dpc(struct brcmf_sdio *bus)
2337 unsigned long intstatus;
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 */
2343 brcmf_dbg(TRACE, "Enter\n");
2345 sdio_claim_host(bus->sdiodev->func[1]);
2347 /* If waiting for HTAVAIL, check status */
2348 if (!bus->sr_enabled && bus->clkstate == CLK_PENDING) {
2349 u8 clkctl, devctl = 0;
2352 /* Check for inconsistent device control */
2353 devctl = brcmf_sdiod_regrb(bus->sdiodev,
2354 SBSDIO_DEVICE_CTL, &err);
2356 brcmf_err("error reading DEVCTL: %d\n", err);
2357 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2361 /* Read CSR, if clock on switch to AVAIL, else ignore */
2362 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
2363 SBSDIO_FUNC1_CHIPCLKCSR, &err);
2365 brcmf_err("error reading CSR: %d\n",
2367 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2370 brcmf_dbg(SDIO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2373 if (SBSDIO_HTAV(clkctl)) {
2374 devctl = brcmf_sdiod_regrb(bus->sdiodev,
2375 SBSDIO_DEVICE_CTL, &err);
2377 brcmf_err("error reading DEVCTL: %d\n",
2379 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2381 devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
2382 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
2385 brcmf_err("error writing DEVCTL: %d\n",
2387 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2389 bus->clkstate = CLK_AVAIL;
2393 /* Make sure backplane clock is on */
2394 brcmf_sdio_bus_sleep(bus, false, true);
2396 /* Pending interrupt indicates new device status */
2397 if (atomic_read(&bus->ipend) > 0) {
2398 atomic_set(&bus->ipend, 0);
2399 err = brcmf_sdio_intr_rstatus(bus);
2402 /* Start with leftover status bits */
2403 intstatus = atomic_xchg(&bus->intstatus, 0);
2405 /* Handle flow-control change: read new state in case our ack
2406 * crossed another change interrupt. If change still set, assume
2407 * FC ON for safety, let next loop through do the debounce.
2409 if (intstatus & I_HMB_FC_CHANGE) {
2410 intstatus &= ~I_HMB_FC_CHANGE;
2411 err = w_sdreg32(bus, I_HMB_FC_CHANGE,
2412 offsetof(struct sdpcmd_regs, intstatus));
2414 err = r_sdreg32(bus, &newstatus,
2415 offsetof(struct sdpcmd_regs, intstatus));
2416 bus->sdcnt.f1regdata += 2;
2417 atomic_set(&bus->fcstate,
2418 !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)));
2419 intstatus |= (newstatus & bus->hostintmask);
2422 /* Handle host mailbox indication */
2423 if (intstatus & I_HMB_HOST_INT) {
2424 intstatus &= ~I_HMB_HOST_INT;
2425 intstatus |= brcmf_sdio_hostmail(bus);
2428 sdio_release_host(bus->sdiodev->func[1]);
2430 /* Generally don't ask for these, can get CRC errors... */
2431 if (intstatus & I_WR_OOSYNC) {
2432 brcmf_err("Dongle reports WR_OOSYNC\n");
2433 intstatus &= ~I_WR_OOSYNC;
2436 if (intstatus & I_RD_OOSYNC) {
2437 brcmf_err("Dongle reports RD_OOSYNC\n");
2438 intstatus &= ~I_RD_OOSYNC;
2441 if (intstatus & I_SBINT) {
2442 brcmf_err("Dongle reports SBINT\n");
2443 intstatus &= ~I_SBINT;
2446 /* Would be active due to wake-wlan in gSPI */
2447 if (intstatus & I_CHIPACTIVE) {
2448 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2449 intstatus &= ~I_CHIPACTIVE;
2452 /* Ignore frame indications if rxskip is set */
2454 intstatus &= ~I_HMB_FRAME_IND;
2456 /* On frame indication, read available frames */
2457 if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) {
2458 framecnt = brcmf_sdio_readframes(bus, rxlimit);
2459 if (!bus->rxpending)
2460 intstatus &= ~I_HMB_FRAME_IND;
2461 rxlimit -= min(framecnt, rxlimit);
2464 /* Keep still-pending events for next scheduling */
2466 for_each_set_bit(n, &intstatus, 32)
2467 set_bit(n, (unsigned long *)&bus->intstatus.counter);
2470 brcmf_sdio_clrintr(bus);
2472 if (data_ok(bus) && bus->ctrl_frame_stat &&
2473 (bus->clkstate == CLK_AVAIL)) {
2476 sdio_claim_host(bus->sdiodev->func[1]);
2477 err = brcmf_sdiod_send_buf(bus->sdiodev, bus->ctrl_frame_buf,
2478 (u32)bus->ctrl_frame_len);
2481 /* On failure, abort the command and
2482 terminate the frame */
2483 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2485 bus->sdcnt.tx_sderrs++;
2487 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
2489 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2491 bus->sdcnt.f1regdata++;
2493 for (i = 0; i < 3; i++) {
2495 hi = brcmf_sdiod_regrb(bus->sdiodev,
2496 SBSDIO_FUNC1_WFRAMEBCHI,
2498 lo = brcmf_sdiod_regrb(bus->sdiodev,
2499 SBSDIO_FUNC1_WFRAMEBCLO,
2501 bus->sdcnt.f1regdata += 2;
2502 if ((hi == 0) && (lo == 0))
2507 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
2509 sdio_release_host(bus->sdiodev->func[1]);
2510 bus->ctrl_frame_stat = false;
2511 brcmf_sdio_wait_event_wakeup(bus);
2513 /* Send queued frames (limit 1 if rx may still be pending) */
2514 else if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
2515 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit
2517 framecnt = bus->rxpending ? min(txlimit, bus->txminmax) :
2519 framecnt = brcmf_sdio_sendfromq(bus, framecnt);
2520 txlimit -= framecnt;
2523 if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) || (err != 0)) {
2524 brcmf_err("failed backplane access over SDIO, halting operation\n");
2525 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2526 atomic_set(&bus->intstatus, 0);
2527 } else if (atomic_read(&bus->intstatus) ||
2528 atomic_read(&bus->ipend) > 0 ||
2529 (!atomic_read(&bus->fcstate) &&
2530 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
2531 data_ok(bus)) || PKT_AVAILABLE()) {
2532 atomic_inc(&bus->dpc_tskcnt);
2535 /* If we're done for now, turn off clock request. */
2536 if ((bus->clkstate != CLK_PENDING)
2537 && bus->idletime == BRCMF_IDLE_IMMEDIATE) {
2538 bus->activity = false;
2539 brcmf_dbg(SDIO, "idle state\n");
2540 sdio_claim_host(bus->sdiodev->func[1]);
2541 brcmf_sdio_bus_sleep(bus, true, false);
2542 sdio_release_host(bus->sdiodev->func[1]);
2546 static struct pktq *brcmf_sdio_bus_gettxq(struct device *dev)
2548 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2549 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2550 struct brcmf_sdio *bus = sdiodev->bus;
2555 static int brcmf_sdio_bus_txdata(struct device *dev, struct sk_buff *pkt)
2559 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2560 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2561 struct brcmf_sdio *bus = sdiodev->bus;
2564 brcmf_dbg(TRACE, "Enter\n");
2568 /* Add space for the header */
2569 skb_push(pkt, bus->tx_hdrlen);
2570 /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2572 prec = prio2prec((pkt->priority & PRIOMASK));
2574 /* Check for existing queue, current flow-control,
2575 pending event, or pending clock */
2576 brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
2577 bus->sdcnt.fcqueued++;
2579 /* Priority based enq */
2580 spin_lock_irqsave(&bus->txqlock, flags);
2581 if (!brcmf_c_prec_enq(bus->sdiodev->dev, &bus->txq, pkt, prec)) {
2582 skb_pull(pkt, bus->tx_hdrlen);
2583 brcmf_err("out of bus->txq !!!\n");
2589 if (pktq_len(&bus->txq) >= TXHI) {
2591 brcmf_txflowblock(bus->sdiodev->dev, true);
2593 spin_unlock_irqrestore(&bus->txqlock, flags);
2596 if (pktq_plen(&bus->txq, prec) > qcount[prec])
2597 qcount[prec] = pktq_plen(&bus->txq, prec);
2600 if (atomic_read(&bus->dpc_tskcnt) == 0) {
2601 atomic_inc(&bus->dpc_tskcnt);
2602 queue_work(bus->brcmf_wq, &bus->datawork);
2609 #define CONSOLE_LINE_MAX 192
2611 static int brcmf_sdio_readconsole(struct brcmf_sdio *bus)
2613 struct brcmf_console *c = &bus->console;
2614 u8 line[CONSOLE_LINE_MAX], ch;
2618 /* Don't do anything until FWREADY updates console address */
2619 if (bus->console_addr == 0)
2622 /* Read console log struct */
2623 addr = bus->console_addr + offsetof(struct rte_console, log_le);
2624 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&c->log_le,
2629 /* Allocate console buffer (one time only) */
2630 if (c->buf == NULL) {
2631 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2632 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2637 idx = le32_to_cpu(c->log_le.idx);
2639 /* Protect against corrupt value */
2640 if (idx > c->bufsize)
2643 /* Skip reading the console buffer if the index pointer
2648 /* Read the console buffer */
2649 addr = le32_to_cpu(c->log_le.buf);
2650 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, c->buf, c->bufsize);
2654 while (c->last != idx) {
2655 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2656 if (c->last == idx) {
2657 /* This would output a partial line.
2659 * the buffer pointer and output this
2660 * line next time around.
2665 c->last = c->bufsize - n;
2668 ch = c->buf[c->last];
2669 c->last = (c->last + 1) % c->bufsize;
2676 if (line[n - 1] == '\r')
2679 pr_debug("CONSOLE: %s\n", line);
2688 static int brcmf_sdio_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
2693 bus->ctrl_frame_stat = false;
2694 ret = brcmf_sdiod_send_buf(bus->sdiodev, frame, len);
2697 /* On failure, abort the command and terminate the frame */
2698 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2700 bus->sdcnt.tx_sderrs++;
2702 brcmf_sdiod_abort(bus->sdiodev, SDIO_FUNC_2);
2704 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2706 bus->sdcnt.f1regdata++;
2708 for (i = 0; i < 3; i++) {
2710 hi = brcmf_sdiod_regrb(bus->sdiodev,
2711 SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2712 lo = brcmf_sdiod_regrb(bus->sdiodev,
2713 SBSDIO_FUNC1_WFRAMEBCLO, NULL);
2714 bus->sdcnt.f1regdata += 2;
2715 if (hi == 0 && lo == 0)
2721 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
2727 brcmf_sdio_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
2734 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2735 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2736 struct brcmf_sdio *bus = sdiodev->bus;
2737 struct brcmf_sdio_hdrinfo hd_info = {0};
2739 brcmf_dbg(TRACE, "Enter\n");
2741 /* Back the pointer to make a room for bus header */
2742 frame = msg - bus->tx_hdrlen;
2743 len = (msglen += bus->tx_hdrlen);
2745 /* Add alignment padding (optional for ctl frames) */
2746 doff = ((unsigned long)frame % bus->head_align);
2751 memset(frame, 0, doff + bus->tx_hdrlen);
2753 /* precondition: doff < bus->head_align */
2754 doff += bus->tx_hdrlen;
2756 /* Round send length to next SDIO block */
2758 if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2759 pad = bus->blocksize - (len % bus->blocksize);
2760 if ((pad > bus->roundup) || (pad >= bus->blocksize))
2762 } else if (len % bus->head_align) {
2763 pad = bus->head_align - (len % bus->head_align);
2767 /* precondition: IS_ALIGNED((unsigned long)frame, 2) */
2769 /* Make sure backplane clock is on */
2770 sdio_claim_host(bus->sdiodev->func[1]);
2771 brcmf_sdio_bus_sleep(bus, false, false);
2772 sdio_release_host(bus->sdiodev->func[1]);
2774 hd_info.len = (u16)msglen;
2775 hd_info.channel = SDPCM_CONTROL_CHANNEL;
2776 hd_info.dat_offset = doff;
2777 hd_info.seq_num = bus->tx_seq;
2778 hd_info.lastfrm = true;
2779 hd_info.tail_pad = pad;
2780 brcmf_sdio_hdpack(bus, frame, &hd_info);
2783 brcmf_sdio_update_hwhdr(frame, len);
2785 if (!data_ok(bus)) {
2786 brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
2787 bus->tx_max, bus->tx_seq);
2788 bus->ctrl_frame_stat = true;
2790 bus->ctrl_frame_buf = frame;
2791 bus->ctrl_frame_len = len;
2793 wait_event_interruptible_timeout(bus->ctrl_wait,
2794 !bus->ctrl_frame_stat,
2795 msecs_to_jiffies(2000));
2797 if (!bus->ctrl_frame_stat) {
2798 brcmf_dbg(SDIO, "ctrl_frame_stat == false\n");
2801 brcmf_dbg(SDIO, "ctrl_frame_stat == true\n");
2807 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
2808 frame, len, "Tx Frame:\n");
2809 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
2811 frame, min_t(u16, len, 16), "TxHdr:\n");
2814 sdio_claim_host(bus->sdiodev->func[1]);
2815 ret = brcmf_sdio_tx_frame(bus, frame, len);
2816 sdio_release_host(bus->sdiodev->func[1]);
2817 } while (ret < 0 && retries++ < TXRETRIES);
2820 if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) &&
2821 atomic_read(&bus->dpc_tskcnt) == 0) {
2822 bus->activity = false;
2823 sdio_claim_host(bus->sdiodev->func[1]);
2824 brcmf_dbg(INFO, "idle\n");
2825 brcmf_sdio_clkctl(bus, CLK_NONE, true);
2826 sdio_release_host(bus->sdiodev->func[1]);
2830 bus->sdcnt.tx_ctlerrs++;
2832 bus->sdcnt.tx_ctlpkts++;
2834 return ret ? -EIO : 0;
2838 static inline bool brcmf_sdio_valid_shared_address(u32 addr)
2840 return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
2843 static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
2844 struct sdpcm_shared *sh)
2849 struct sdpcm_shared_le sh_le;
2852 shaddr = bus->ci->rambase + bus->ramsize - 4;
2855 * Read last word in socram to determine
2856 * address of sdpcm_shared structure
2858 sdio_claim_host(bus->sdiodev->func[1]);
2859 brcmf_sdio_bus_sleep(bus, false, false);
2860 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, shaddr, (u8 *)&addr_le, 4);
2861 sdio_release_host(bus->sdiodev->func[1]);
2865 addr = le32_to_cpu(addr_le);
2867 brcmf_dbg(SDIO, "sdpcm_shared address 0x%08X\n", addr);
2870 * Check if addr is valid.
2871 * NVRAM length at the end of memory should have been overwritten.
2873 if (!brcmf_sdio_valid_shared_address(addr)) {
2874 brcmf_err("invalid sdpcm_shared address 0x%08X\n",
2879 /* Read hndrte_shared structure */
2880 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr, (u8 *)&sh_le,
2881 sizeof(struct sdpcm_shared_le));
2886 sh->flags = le32_to_cpu(sh_le.flags);
2887 sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
2888 sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
2889 sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
2890 sh->assert_line = le32_to_cpu(sh_le.assert_line);
2891 sh->console_addr = le32_to_cpu(sh_le.console_addr);
2892 sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
2894 if ((sh->flags & SDPCM_SHARED_VERSION_MASK) > SDPCM_SHARED_VERSION) {
2895 brcmf_err("sdpcm shared version unsupported: dhd %d dongle %d\n",
2896 SDPCM_SHARED_VERSION,
2897 sh->flags & SDPCM_SHARED_VERSION_MASK);
2904 static int brcmf_sdio_dump_console(struct brcmf_sdio *bus,
2905 struct sdpcm_shared *sh, char __user *data,
2908 u32 addr, console_ptr, console_size, console_index;
2909 char *conbuf = NULL;
2915 /* obtain console information from device memory */
2916 addr = sh->console_addr + offsetof(struct rte_console, log_le);
2917 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2918 (u8 *)&sh_val, sizeof(u32));
2921 console_ptr = le32_to_cpu(sh_val);
2923 addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
2924 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2925 (u8 *)&sh_val, sizeof(u32));
2928 console_size = le32_to_cpu(sh_val);
2930 addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
2931 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, addr,
2932 (u8 *)&sh_val, sizeof(u32));
2935 console_index = le32_to_cpu(sh_val);
2937 /* allocate buffer for console data */
2938 if (console_size <= CONSOLE_BUFFER_MAX)
2939 conbuf = vzalloc(console_size+1);
2944 /* obtain the console data from device */
2945 conbuf[console_size] = '\0';
2946 rv = brcmf_sdiod_ramrw(bus->sdiodev, false, console_ptr, (u8 *)conbuf,
2951 rv = simple_read_from_buffer(data, count, &pos,
2952 conbuf + console_index,
2953 console_size - console_index);
2958 if (console_index > 0) {
2960 rv = simple_read_from_buffer(data+nbytes, count, &pos,
2961 conbuf, console_index - 1);
2971 static int brcmf_sdio_trap_info(struct brcmf_sdio *bus, struct sdpcm_shared *sh,
2972 char __user *data, size_t count)
2976 struct brcmf_trap_info tr;
2979 if ((sh->flags & SDPCM_SHARED_TRAP) == 0) {
2980 brcmf_dbg(INFO, "no trap in firmware\n");
2984 error = brcmf_sdiod_ramrw(bus->sdiodev, false, sh->trap_addr, (u8 *)&tr,
2985 sizeof(struct brcmf_trap_info));
2989 res = scnprintf(buf, sizeof(buf),
2990 "dongle trap info: type 0x%x @ epc 0x%08x\n"
2991 " cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
2992 " lr 0x%08x pc 0x%08x offset 0x%x\n"
2993 " r0 0x%08x r1 0x%08x r2 0x%08x r3 0x%08x\n"
2994 " r4 0x%08x r5 0x%08x r6 0x%08x r7 0x%08x\n",
2995 le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
2996 le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
2997 le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
2998 le32_to_cpu(tr.pc), sh->trap_addr,
2999 le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
3000 le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
3001 le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
3002 le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));
3004 return simple_read_from_buffer(data, count, &pos, buf, res);
3007 static int brcmf_sdio_assert_info(struct brcmf_sdio *bus,
3008 struct sdpcm_shared *sh, char __user *data,
3013 char file[80] = "?";
3014 char expr[80] = "<???>";
3018 if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
3019 brcmf_dbg(INFO, "firmware not built with -assert\n");
3021 } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
3022 brcmf_dbg(INFO, "no assert in dongle\n");
3026 sdio_claim_host(bus->sdiodev->func[1]);
3027 if (sh->assert_file_addr != 0) {
3028 error = brcmf_sdiod_ramrw(bus->sdiodev, false,
3029 sh->assert_file_addr, (u8 *)file, 80);
3033 if (sh->assert_exp_addr != 0) {
3034 error = brcmf_sdiod_ramrw(bus->sdiodev, false,
3035 sh->assert_exp_addr, (u8 *)expr, 80);
3039 sdio_release_host(bus->sdiodev->func[1]);
3041 res = scnprintf(buf, sizeof(buf),
3042 "dongle assert: %s:%d: assert(%s)\n",
3043 file, sh->assert_line, expr);
3044 return simple_read_from_buffer(data, count, &pos, buf, res);
3047 static int brcmf_sdio_checkdied(struct brcmf_sdio *bus)
3050 struct sdpcm_shared sh;
3052 error = brcmf_sdio_readshared(bus, &sh);
3057 if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
3058 brcmf_dbg(INFO, "firmware not built with -assert\n");
3059 else if (sh.flags & SDPCM_SHARED_ASSERT)
3060 brcmf_err("assertion in dongle\n");
3062 if (sh.flags & SDPCM_SHARED_TRAP)
3063 brcmf_err("firmware trap in dongle\n");
3068 static int brcmf_sdio_died_dump(struct brcmf_sdio *bus, char __user *data,
3069 size_t count, loff_t *ppos)
3072 struct sdpcm_shared sh;
3079 error = brcmf_sdio_readshared(bus, &sh);
3083 error = brcmf_sdio_assert_info(bus, &sh, data, count);
3088 error = brcmf_sdio_trap_info(bus, &sh, data+nbytes, count);
3093 error = brcmf_sdio_dump_console(bus, &sh, data+nbytes, count);
3104 static ssize_t brcmf_sdio_forensic_read(struct file *f, char __user *data,
3105 size_t count, loff_t *ppos)
3107 struct brcmf_sdio *bus = f->private_data;
3110 res = brcmf_sdio_died_dump(bus, data, count, ppos);
3113 return (ssize_t)res;
3116 static const struct file_operations brcmf_sdio_forensic_ops = {
3117 .owner = THIS_MODULE,
3118 .open = simple_open,
3119 .read = brcmf_sdio_forensic_read
3122 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3124 struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
3125 struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);
3127 if (IS_ERR_OR_NULL(dentry))
3130 debugfs_create_file("forensics", S_IRUGO, dentry, bus,
3131 &brcmf_sdio_forensic_ops);
3132 brcmf_debugfs_create_sdio_count(drvr, &bus->sdcnt);
3135 static int brcmf_sdio_checkdied(struct brcmf_sdio *bus)
3140 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3146 brcmf_sdio_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
3152 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3153 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3154 struct brcmf_sdio *bus = sdiodev->bus;
3156 brcmf_dbg(TRACE, "Enter\n");
3158 /* Wait until control frame is available */
3159 timeleft = brcmf_sdio_dcmd_resp_wait(bus, &bus->rxlen, &pending);
3161 spin_lock_bh(&bus->rxctl_lock);
3163 memcpy(msg, bus->rxctl, min(msglen, rxlen));
3165 buf = bus->rxctl_orig;
3166 bus->rxctl_orig = NULL;
3168 spin_unlock_bh(&bus->rxctl_lock);
3172 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
3174 } else if (timeleft == 0) {
3175 brcmf_err("resumed on timeout\n");
3176 brcmf_sdio_checkdied(bus);
3177 } else if (pending) {
3178 brcmf_dbg(CTL, "cancelled\n");
3179 return -ERESTARTSYS;
3181 brcmf_dbg(CTL, "resumed for unknown reason?\n");
3182 brcmf_sdio_checkdied(bus);
3186 bus->sdcnt.rx_ctlpkts++;
3188 bus->sdcnt.rx_ctlerrs++;
3190 return rxlen ? (int)rxlen : -ETIMEDOUT;
3193 static bool brcmf_sdio_download_state(struct brcmf_sdio *bus, bool enter)
3195 struct chip_info *ci = bus->ci;
3197 /* To enter download state, disable ARM and reset SOCRAM.
3198 * To exit download state, simply reset ARM (default is RAM boot).
3201 bus->alp_only = true;
3203 brcmf_sdio_chip_enter_download(bus->sdiodev, ci);
3205 if (!brcmf_sdio_chip_exit_download(bus->sdiodev, ci, bus->vars,
3209 /* Allow HT Clock now that the ARM is running. */
3210 bus->alp_only = false;
3212 bus->sdiodev->bus_if->state = BRCMF_BUS_LOAD;
3218 static int brcmf_sdio_download_code_file(struct brcmf_sdio *bus)
3220 const struct firmware *fw;
3226 fw = brcmf_sdio_get_fw(bus, BRCMF_FIRMWARE_BIN);
3230 if (brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_ARM_CR4) !=
3232 memcpy(&bus->ci->rst_vec, fw->data, sizeof(bus->ci->rst_vec));
3236 address = bus->ci->rambase;
3237 while (offset < fw->size) {
3238 len = ((offset + MEMBLOCK) < fw->size) ? MEMBLOCK :
3240 err = brcmf_sdiod_ramrw(bus->sdiodev, true, address,
3241 (u8 *)&fw->data[offset], len);
3243 brcmf_err("error %d on writing %d membytes at 0x%08x\n",
3252 release_firmware(fw);
3258 * ProcessVars:Takes a buffer of "<var>=<value>\n" lines read from a file
3259 * and ending in a NUL.
3260 * Removes carriage returns, empty lines, comment lines, and converts
3262 * Shortens buffer as needed and pads with NULs. End of buffer is marked
3266 static int brcmf_sdio_strip_nvram(struct brcmf_sdio *bus,
3267 const struct firmware *nv)
3274 uint buf_len, n, len;
3277 varbuf = vmalloc(len);
3281 memcpy(varbuf, nv->data, len);
3284 findNewline = false;
3287 for (n = 0; n < len; n++) {
3290 if (varbuf[n] == '\r')
3292 if (findNewline && varbuf[n] != '\n')
3294 findNewline = false;
3295 if (varbuf[n] == '#') {
3299 if (varbuf[n] == '\n') {
3309 buf_len = dp - varbuf;
3310 while (dp < varbuf + n)
3314 /* roundup needed for download to device */
3315 bus->varsz = roundup(buf_len + 1, 4);
3316 bus->vars = kmalloc(bus->varsz, GFP_KERNEL);
3317 if (bus->vars == NULL) {
3323 /* copy the processed variables and add null termination */
3324 memcpy(bus->vars, varbuf, buf_len);
3325 bus->vars[buf_len] = 0;
3331 static int brcmf_sdio_download_nvram(struct brcmf_sdio *bus)
3333 const struct firmware *nv;
3336 nv = brcmf_sdio_get_fw(bus, BRCMF_FIRMWARE_NVRAM);
3340 ret = brcmf_sdio_strip_nvram(bus, nv);
3342 release_firmware(nv);
3347 static int brcmf_sdio_download_firmware(struct brcmf_sdio *bus)
3349 int bcmerror = -EFAULT;
3352 sdio_claim_host(bus->sdiodev->func[1]);
3353 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
3355 /* Keep arm in reset */
3356 if (!brcmf_sdio_download_state(bus, true)) {
3357 brcmf_err("error placing ARM core in reset\n");
3361 if (brcmf_sdio_download_code_file(bus)) {
3362 brcmf_err("dongle image file download failed\n");
3366 if (brcmf_sdio_download_nvram(bus)) {
3367 brcmf_err("dongle nvram file download failed\n");
3371 /* Take arm out of reset */
3372 if (!brcmf_sdio_download_state(bus, false)) {
3373 brcmf_err("error getting out of ARM core reset\n");
3380 brcmf_sdio_clkctl(bus, CLK_SDONLY, false);
3381 sdio_release_host(bus->sdiodev->func[1]);
3385 static bool brcmf_sdio_sr_capable(struct brcmf_sdio *bus)
3389 brcmf_dbg(TRACE, "Enter\n");
3391 /* old chips with PMU version less than 17 don't support save restore */
3392 if (bus->ci->pmurev < 17)
3395 /* read PMU chipcontrol register 3*/
3396 addr = CORE_CC_REG(bus->ci->c_inf[0].base, chipcontrol_addr);
3397 brcmf_sdiod_regwl(bus->sdiodev, addr, 3, NULL);
3398 addr = CORE_CC_REG(bus->ci->c_inf[0].base, chipcontrol_data);
3399 reg = brcmf_sdiod_regrl(bus->sdiodev, addr, NULL);
3404 static void brcmf_sdio_sr_init(struct brcmf_sdio *bus)
3409 brcmf_dbg(TRACE, "Enter\n");
3411 val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, &err);
3413 brcmf_err("error reading SBSDIO_FUNC1_WAKEUPCTRL\n");
3417 val |= 1 << SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT;
3418 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL, val, &err);
3420 brcmf_err("error writing SBSDIO_FUNC1_WAKEUPCTRL\n");
3424 /* Add CMD14 Support */
3425 brcmf_sdiod_regwb(bus->sdiodev, SDIO_CCCR_BRCM_CARDCAP,
3426 (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT |
3427 SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT),
3430 brcmf_err("error writing SDIO_CCCR_BRCM_CARDCAP\n");
3434 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3435 SBSDIO_FORCE_HT, &err);
3437 brcmf_err("error writing SBSDIO_FUNC1_CHIPCLKCSR\n");
3442 bus->sr_enabled = true;
3443 brcmf_dbg(INFO, "SR enabled\n");
3446 /* enable KSO bit */
3447 static int brcmf_sdio_kso_init(struct brcmf_sdio *bus)
3452 brcmf_dbg(TRACE, "Enter\n");
3454 /* KSO bit added in SDIO core rev 12 */
3455 if (bus->ci->c_inf[1].rev < 12)
3458 val = brcmf_sdiod_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, &err);
3460 brcmf_err("error reading SBSDIO_FUNC1_SLEEPCSR\n");
3464 if (!(val & SBSDIO_FUNC1_SLEEPCSR_KSO_MASK)) {
3465 val |= (SBSDIO_FUNC1_SLEEPCSR_KSO_EN <<
3466 SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
3467 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
3470 brcmf_err("error writing SBSDIO_FUNC1_SLEEPCSR\n");
3479 static int brcmf_sdio_bus_preinit(struct device *dev)
3481 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3482 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3483 struct brcmf_sdio *bus = sdiodev->bus;
3489 /* the commands below use the terms tx and rx from
3490 * a device perspective, ie. bus:txglom affects the
3491 * bus transfers from device to host.
3493 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
3494 if (bus->ci->c_inf[idx].rev < 12) {
3495 /* for sdio core rev < 12, disable txgloming */
3497 err = brcmf_iovar_data_set(dev, "bus:txglom", &value,
3500 /* otherwise, set txglomalign */
3503 value = sdiodev->pdata->sd_sgentry_align;
3504 /* SDIO ADMA requires at least 32 bit alignment */
3505 value = max_t(u32, value, 4);
3506 err = brcmf_iovar_data_set(dev, "bus:txglomalign", &value,
3513 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
3514 if (sdiodev->sg_support) {
3515 bus->txglom = false;
3517 pad_size = bus->sdiodev->func[2]->cur_blksize << 1;
3518 bus->txglom_sgpad = brcmu_pkt_buf_get_skb(pad_size);
3519 if (!bus->txglom_sgpad)
3520 brcmf_err("allocating txglom padding skb failed, reduced performance\n");
3522 err = brcmf_iovar_data_set(bus->sdiodev->dev, "bus:rxglom",
3523 &value, sizeof(u32));
3525 /* bus:rxglom is allowed to fail */
3529 bus->tx_hdrlen += SDPCM_HWEXT_LEN;
3532 brcmf_bus_add_txhdrlen(bus->sdiodev->dev, bus->tx_hdrlen);
3538 static int brcmf_sdio_bus_init(struct device *dev)
3540 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3541 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3542 struct brcmf_sdio *bus = sdiodev->bus;
3546 brcmf_dbg(TRACE, "Enter\n");
3548 /* try to download image and nvram to the dongle */
3549 if (bus_if->state == BRCMF_BUS_DOWN) {
3550 err = brcmf_sdio_download_firmware(bus);
3555 if (!bus->sdiodev->bus_if->drvr)
3558 /* Start the watchdog timer */
3559 bus->sdcnt.tickcnt = 0;
3560 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
3562 sdio_claim_host(bus->sdiodev->func[1]);
3564 /* Make sure backplane clock is on, needed to generate F2 interrupt */
3565 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
3566 if (bus->clkstate != CLK_AVAIL)
3569 /* Force clocks on backplane to be sure F2 interrupt propagates */
3570 saveclk = brcmf_sdiod_regrb(bus->sdiodev,
3571 SBSDIO_FUNC1_CHIPCLKCSR, &err);
3573 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3574 (saveclk | SBSDIO_FORCE_HT), &err);
3577 brcmf_err("Failed to force clock for F2: err %d\n", err);
3581 /* Enable function 2 (frame transfers) */
3582 w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
3583 offsetof(struct sdpcmd_regs, tosbmailboxdata));
3584 err = sdio_enable_func(bus->sdiodev->func[SDIO_FUNC_2]);
3587 brcmf_dbg(INFO, "enable F2: err=%d\n", err);
3589 /* If F2 successfully enabled, set core and enable interrupts */
3591 /* Set up the interrupt mask and enable interrupts */
3592 bus->hostintmask = HOSTINTMASK;
3593 w_sdreg32(bus, bus->hostintmask,
3594 offsetof(struct sdpcmd_regs, hostintmask));
3596 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_WATERMARK, 8, &err);
3598 /* Disable F2 again */
3599 sdio_disable_func(bus->sdiodev->func[SDIO_FUNC_2]);
3603 if (brcmf_sdio_sr_capable(bus)) {
3604 brcmf_sdio_sr_init(bus);
3606 /* Restore previous clock setting */
3607 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3612 ret = brcmf_sdiod_intr_register(bus->sdiodev);
3614 brcmf_err("intr register failed:%d\n", ret);
3617 /* If we didn't come up, turn off backplane clock */
3618 if (bus_if->state != BRCMF_BUS_DATA)
3619 brcmf_sdio_clkctl(bus, CLK_NONE, false);
3622 sdio_release_host(bus->sdiodev->func[1]);
3627 void brcmf_sdio_isr(struct brcmf_sdio *bus)
3629 brcmf_dbg(TRACE, "Enter\n");
3632 brcmf_err("bus is null pointer, exiting\n");
3636 if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) {
3637 brcmf_err("bus is down. we have nothing to do\n");
3640 /* Count the interrupt call */
3641 bus->sdcnt.intrcount++;
3643 atomic_set(&bus->ipend, 1);
3645 if (brcmf_sdio_intr_rstatus(bus)) {
3646 brcmf_err("failed backplane access\n");
3647 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
3650 /* Disable additional interrupts (is this needed now)? */
3652 brcmf_err("isr w/o interrupt configured!\n");
3654 atomic_inc(&bus->dpc_tskcnt);
3655 queue_work(bus->brcmf_wq, &bus->datawork);
3658 static bool brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus)
3661 struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev);
3664 brcmf_dbg(TIMER, "Enter\n");
3666 /* Poll period: check device if appropriate. */
3667 if (!bus->sr_enabled &&
3668 bus->poll && (++bus->polltick >= bus->pollrate)) {
3671 /* Reset poll tick */
3674 /* Check device if no interrupts */
3676 (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {
3678 if (atomic_read(&bus->dpc_tskcnt) == 0) {
3681 sdio_claim_host(bus->sdiodev->func[1]);
3682 devpend = brcmf_sdiod_regrb(bus->sdiodev,
3685 sdio_release_host(bus->sdiodev->func[1]);
3687 devpend & (INTR_STATUS_FUNC1 |
3691 /* If there is something, make like the ISR and
3694 bus->sdcnt.pollcnt++;
3695 atomic_set(&bus->ipend, 1);
3697 atomic_inc(&bus->dpc_tskcnt);
3698 queue_work(bus->brcmf_wq, &bus->datawork);
3702 /* Update interrupt tracking */
3703 bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
3706 /* Poll for console output periodically */
3707 if (bus_if && bus_if->state == BRCMF_BUS_DATA &&
3708 bus->console_interval != 0) {
3709 bus->console.count += BRCMF_WD_POLL_MS;
3710 if (bus->console.count >= bus->console_interval) {
3711 bus->console.count -= bus->console_interval;
3712 sdio_claim_host(bus->sdiodev->func[1]);
3713 /* Make sure backplane clock is on */
3714 brcmf_sdio_bus_sleep(bus, false, false);
3715 if (brcmf_sdio_readconsole(bus) < 0)
3717 bus->console_interval = 0;
3718 sdio_release_host(bus->sdiodev->func[1]);
3723 /* On idle timeout clear activity flag and/or turn off clock */
3724 if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
3725 if (++bus->idlecount >= bus->idletime) {
3727 if (bus->activity) {
3728 bus->activity = false;
3729 brcmf_sdio_wd_timer(bus, BRCMF_WD_POLL_MS);
3731 brcmf_dbg(SDIO, "idle\n");
3732 sdio_claim_host(bus->sdiodev->func[1]);
3733 brcmf_sdio_bus_sleep(bus, true, false);
3734 sdio_release_host(bus->sdiodev->func[1]);
3739 return (atomic_read(&bus->ipend) > 0);
3742 static void brcmf_sdio_dataworker(struct work_struct *work)
3744 struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
3747 while (atomic_read(&bus->dpc_tskcnt)) {
3748 brcmf_sdio_dpc(bus);
3749 atomic_dec(&bus->dpc_tskcnt);
3753 static bool brcmf_sdio_probe_malloc(struct brcmf_sdio *bus)
3755 brcmf_dbg(TRACE, "Enter\n");
3757 if (bus->sdiodev->bus_if->maxctl) {
3759 roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
3760 ALIGNMENT) + bus->head_align;
3761 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
3770 brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
3778 bus->alp_only = true;
3780 sdio_claim_host(bus->sdiodev->func[1]);
3782 pr_debug("F1 signature read @0x18000000=0x%4x\n",
3783 brcmf_sdiod_regrl(bus->sdiodev, SI_ENUM_BASE, NULL));
3786 * Force PLL off until brcmf_sdio_chip_attach()
3787 * programs PLL control regs
3790 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3791 BRCMF_INIT_CLKCTL1, &err);
3793 clkctl = brcmf_sdiod_regrb(bus->sdiodev,
3794 SBSDIO_FUNC1_CHIPCLKCSR, &err);
3796 if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3797 brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3798 err, BRCMF_INIT_CLKCTL1, clkctl);
3802 if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci)) {
3803 brcmf_err("brcmf_sdio_chip_attach failed!\n");
3807 if (brcmf_sdio_kso_init(bus)) {
3808 brcmf_err("error enabling KSO\n");
3812 if ((bus->sdiodev->pdata) && (bus->sdiodev->pdata->drive_strength))
3813 drivestrength = bus->sdiodev->pdata->drive_strength;
3815 drivestrength = DEFAULT_SDIO_DRIVE_STRENGTH;
3816 brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci, drivestrength);
3818 /* Get info on the SOCRAM cores... */
3819 bus->ramsize = bus->ci->ramsize;
3820 if (!(bus->ramsize)) {
3821 brcmf_err("failed to find SOCRAM memory!\n");
3825 /* Set card control so an SDIO card reset does a WLAN backplane reset */
3826 reg_val = brcmf_sdiod_regrb(bus->sdiodev,
3827 SDIO_CCCR_BRCM_CARDCTRL, &err);
3831 reg_val |= SDIO_CCCR_BRCM_CARDCTRL_WLANRESET;
3833 brcmf_sdiod_regwb(bus->sdiodev,
3834 SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err);
3838 /* set PMUControl so a backplane reset does PMU state reload */
3839 reg_addr = CORE_CC_REG(bus->ci->c_inf[0].base,
3841 reg_val = brcmf_sdiod_regrl(bus->sdiodev,
3847 reg_val |= (BCMA_CC_PMU_CTL_RES_RELOAD << BCMA_CC_PMU_CTL_RES_SHIFT);
3849 brcmf_sdiod_regwl(bus->sdiodev,
3857 sdio_release_host(bus->sdiodev->func[1]);
3859 brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3861 /* allocate header buffer */
3862 bus->hdrbuf = kzalloc(MAX_HDR_READ + bus->head_align, GFP_KERNEL);
3865 /* Locate an appropriately-aligned portion of hdrbuf */
3866 bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3869 /* Set the poll and/or interrupt flags */
3878 sdio_release_host(bus->sdiodev->func[1]);
3882 static bool brcmf_sdio_probe_init(struct brcmf_sdio *bus)
3884 brcmf_dbg(TRACE, "Enter\n");
3886 sdio_claim_host(bus->sdiodev->func[1]);
3888 /* Disable F2 to clear any intermediate frame state on the dongle */
3889 sdio_disable_func(bus->sdiodev->func[SDIO_FUNC_2]);
3891 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
3892 bus->rxflow = false;
3894 /* Done with backplane-dependent accesses, can drop clock... */
3895 brcmf_sdiod_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
3897 sdio_release_host(bus->sdiodev->func[1]);
3899 /* ...and initialize clock/power states */
3900 bus->clkstate = CLK_SDONLY;
3901 bus->idletime = BRCMF_IDLE_INTERVAL;
3902 bus->idleclock = BRCMF_IDLE_ACTIVE;
3904 /* Query the F2 block size, set roundup accordingly */
3905 bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
3906 bus->roundup = min(max_roundup, bus->blocksize);
3909 bus->sleeping = false;
3910 bus->sr_enabled = false;
3916 brcmf_sdio_watchdog_thread(void *data)
3918 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3920 allow_signal(SIGTERM);
3921 /* Run until signal received */
3923 if (kthread_should_stop())
3925 if (!wait_for_completion_interruptible(&bus->watchdog_wait)) {
3926 brcmf_sdio_bus_watchdog(bus);
3927 /* Count the tick for reference */
3928 bus->sdcnt.tickcnt++;
3936 brcmf_sdio_watchdog(unsigned long data)
3938 struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3940 if (bus->watchdog_tsk) {
3941 complete(&bus->watchdog_wait);
3942 /* Reschedule the watchdog */
3943 if (bus->wd_timer_valid)
3944 mod_timer(&bus->timer,
3945 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
3949 static struct brcmf_bus_ops brcmf_sdio_bus_ops = {
3950 .stop = brcmf_sdio_bus_stop,
3951 .preinit = brcmf_sdio_bus_preinit,
3952 .init = brcmf_sdio_bus_init,
3953 .txdata = brcmf_sdio_bus_txdata,
3954 .txctl = brcmf_sdio_bus_txctl,
3955 .rxctl = brcmf_sdio_bus_rxctl,
3956 .gettxq = brcmf_sdio_bus_gettxq,
3959 struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
3962 struct brcmf_sdio *bus;
3964 brcmf_dbg(TRACE, "Enter\n");
3966 /* Allocate private bus interface state */
3967 bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
3971 bus->sdiodev = sdiodev;
3973 skb_queue_head_init(&bus->glom);
3974 bus->txbound = BRCMF_TXBOUND;
3975 bus->rxbound = BRCMF_RXBOUND;
3976 bus->txminmax = BRCMF_TXMINMAX;
3977 bus->tx_seq = SDPCM_SEQ_WRAP - 1;
3979 /* platform specific configuration:
3980 * alignments must be at least 4 bytes for ADMA
3982 bus->head_align = ALIGNMENT;
3983 bus->sgentry_align = ALIGNMENT;
3984 if (sdiodev->pdata) {
3985 if (sdiodev->pdata->sd_head_align > ALIGNMENT)
3986 bus->head_align = sdiodev->pdata->sd_head_align;
3987 if (sdiodev->pdata->sd_sgentry_align > ALIGNMENT)
3988 bus->sgentry_align = sdiodev->pdata->sd_sgentry_align;
3991 INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
3992 bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");
3993 if (bus->brcmf_wq == NULL) {
3994 brcmf_err("insufficient memory to create txworkqueue\n");
3998 /* attempt to attach to the dongle */
3999 if (!(brcmf_sdio_probe_attach(bus))) {
4000 brcmf_err("brcmf_sdio_probe_attach failed\n");
4004 spin_lock_init(&bus->rxctl_lock);
4005 spin_lock_init(&bus->txqlock);
4006 init_waitqueue_head(&bus->ctrl_wait);
4007 init_waitqueue_head(&bus->dcmd_resp_wait);
4009 /* Set up the watchdog timer */
4010 init_timer(&bus->timer);
4011 bus->timer.data = (unsigned long)bus;
4012 bus->timer.function = brcmf_sdio_watchdog;
4014 /* Initialize watchdog thread */
4015 init_completion(&bus->watchdog_wait);
4016 bus->watchdog_tsk = kthread_run(brcmf_sdio_watchdog_thread,
4017 bus, "brcmf_watchdog");
4018 if (IS_ERR(bus->watchdog_tsk)) {
4019 pr_warn("brcmf_watchdog thread failed to start\n");
4020 bus->watchdog_tsk = NULL;
4022 /* Initialize DPC thread */
4023 atomic_set(&bus->dpc_tskcnt, 0);
4025 /* Assign bus interface call back */
4026 bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
4027 bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops;
4028 bus->sdiodev->bus_if->chip = bus->ci->chip;
4029 bus->sdiodev->bus_if->chiprev = bus->ci->chiprev;
4031 /* default sdio bus header length for tx packet */
4032 bus->tx_hdrlen = SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN;
4034 /* Attach to the common layer, reserve hdr space */
4035 ret = brcmf_attach(bus->sdiodev->dev);
4037 brcmf_err("brcmf_attach failed\n");
4041 /* Allocate buffers */
4042 if (!(brcmf_sdio_probe_malloc(bus))) {
4043 brcmf_err("brcmf_sdio_probe_malloc failed\n");
4047 if (!(brcmf_sdio_probe_init(bus))) {
4048 brcmf_err("brcmf_sdio_probe_init failed\n");
4052 brcmf_sdio_debugfs_create(bus);
4053 brcmf_dbg(INFO, "completed!!\n");
4055 /* if firmware path present try to download and bring up bus */
4056 ret = brcmf_bus_start(bus->sdiodev->dev);
4058 brcmf_err("dongle is not responding\n");
4065 brcmf_sdio_remove(bus);
4069 /* Detach and free everything */
4070 void brcmf_sdio_remove(struct brcmf_sdio *bus)
4072 brcmf_dbg(TRACE, "Enter\n");
4075 /* De-register interrupt handler */
4076 brcmf_sdiod_intr_unregister(bus->sdiodev);
4078 cancel_work_sync(&bus->datawork);
4080 destroy_workqueue(bus->brcmf_wq);
4082 if (bus->sdiodev->bus_if->drvr) {
4083 brcmf_detach(bus->sdiodev->dev);
4087 sdio_claim_host(bus->sdiodev->func[1]);
4088 brcmf_sdio_clkctl(bus, CLK_AVAIL, false);
4089 brcmf_sdio_clkctl(bus, CLK_NONE, false);
4090 sdio_release_host(bus->sdiodev->func[1]);
4091 brcmf_sdio_chip_detach(&bus->ci);
4094 brcmu_pkt_buf_free_skb(bus->txglom_sgpad);
4101 brcmf_dbg(TRACE, "Disconnected\n");
4104 void brcmf_sdio_wd_timer(struct brcmf_sdio *bus, uint wdtick)
4106 /* Totally stop the timer */
4107 if (!wdtick && bus->wd_timer_valid) {
4108 del_timer_sync(&bus->timer);
4109 bus->wd_timer_valid = false;
4110 bus->save_ms = wdtick;
4114 /* don't start the wd until fw is loaded */
4115 if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN)
4119 if (bus->save_ms != BRCMF_WD_POLL_MS) {
4120 if (bus->wd_timer_valid)
4121 /* Stop timer and restart at new value */
4122 del_timer_sync(&bus->timer);
4124 /* Create timer again when watchdog period is
4125 dynamically changed or in the first instance
4127 bus->timer.expires =
4128 jiffies + BRCMF_WD_POLL_MS * HZ / 1000;
4129 add_timer(&bus->timer);
4132 /* Re arm the timer, at last watchdog period */
4133 mod_timer(&bus->timer,
4134 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
4137 bus->wd_timer_valid = true;
4138 bus->save_ms = wdtick;