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brcmfmac: streamline sdio bus header code 

Streamlining sdio bus specific header related code as preparation for host
tx glomming

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Franky Lin 2013-08-10 12:27:28 +02:00 committed by John W. Linville
parent cb7f79682a
commit 6bc52319c2
1 changed files with 120 additions and 123 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

243
drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
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@ -201,13 +201,6 @@ struct rte_console {
#define SFC_CRC4WOOS (1 << 2) /* CRC error for write out of sync */
#define SFC_ABORTALL (1 << 3) /* Abort all in-progress frames */
/* HW frame tag */
#define SDPCM_FRAMETAG_LEN 4 /* 2 bytes len, 2 bytes check val */
/* Total length of frame header for dongle protocol */
#define SDPCM_HDRLEN (SDPCM_FRAMETAG_LEN + SDPCM_SWHEADER_LEN)
#define SDPCM_RESERVE (SDPCM_HDRLEN + BRCMF_SDALIGN)
/*
* Software allocation of To SB Mailbox resources
*/
@ -250,38 +243,6 @@ struct rte_console {
/* Current protocol version */
#define SDPCM_PROT_VERSION 4
/* SW frame header */
#define SDPCM_PACKET_SEQUENCE(p) (((u8 *)p)[0] & 0xff)
#define SDPCM_CHANNEL_MASK 0x00000f00
#define SDPCM_CHANNEL_SHIFT 8
#define SDPCM_PACKET_CHANNEL(p) (((u8 *)p)[1] & 0x0f)
#define SDPCM_NEXTLEN_OFFSET 2
/* Data Offset from SOF (HW Tag, SW Tag, Pad) */
#define SDPCM_DOFFSET_OFFSET 3 /* Data Offset */
#define SDPCM_DOFFSET_VALUE(p) (((u8 *)p)[SDPCM_DOFFSET_OFFSET] & 0xff)
#define SDPCM_DOFFSET_MASK 0xff000000
#define SDPCM_DOFFSET_SHIFT 24
#define SDPCM_FCMASK_OFFSET 4 /* Flow control */
#define SDPCM_FCMASK_VALUE(p) (((u8 *)p)[SDPCM_FCMASK_OFFSET] & 0xff)
#define SDPCM_WINDOW_OFFSET 5 /* Credit based fc */
#define SDPCM_WINDOW_VALUE(p) (((u8 *)p)[SDPCM_WINDOW_OFFSET] & 0xff)
#define SDPCM_SWHEADER_LEN 8 /* SW header is 64 bits */
/* logical channel numbers */
#define SDPCM_CONTROL_CHANNEL 0 /* Control channel Id */
#define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication Channel Id */
#define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv Channel Id */
#define SDPCM_GLOM_CHANNEL 3 /* For coalesced packets */
#define SDPCM_TEST_CHANNEL 15 /* Reserved for test/debug packets */
#define SDPCM_SEQUENCE_WRAP 256 /* wrap-around val for 8bit frame seq */
#define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80)
/*
* Shared structure between dongle and the host.
* The structure contains pointers to trap or assert information.
@ -396,8 +357,8 @@ struct sdpcm_shared_le {
__le32 brpt_addr;
};
/* SDIO read frame info */
struct brcmf_sdio_read {
/* dongle SDIO bus specific header info */
struct brcmf_sdio_hdrinfo {
u8 seq_num;
u8 channel;
u16 len;
@ -431,7 +392,7 @@ struct brcmf_sdio {
u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN];
u8 *rxhdr; /* Header of current rx frame (in hdrbuf) */
u8 rx_seq; /* Receive sequence number (expected) */
struct brcmf_sdio_read cur_read;
struct brcmf_sdio_hdrinfo cur_read;
/* info of current read frame */
bool rxskip; /* Skip receive (awaiting NAK ACK) */
bool rxpending; /* Data frame pending in dongle */
@ -1042,18 +1003,64 @@ static void brcmf_sdbrcm_free_glom(struct brcmf_sdio *bus)
}
}
static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
struct brcmf_sdio_read *rd,
enum brcmf_sdio_frmtype type)
/**
* brcmfmac sdio bus specific header
* This is the lowest layer header wrapped on the packets transmitted between
* host and WiFi dongle which contains information needed for SDIO core and
* firmware
*
* It consists of 2 parts: hw header and software header
* hardware header (frame tag) - 4 bytes
* Byte 0~1: Frame length
* Byte 2~3: Checksum, bit-wise inverse of frame length
* software header - 8 bytes
* Byte 0: Rx/Tx sequence number
* Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
* Byte 2: Length of next data frame, reserved for Tx
* Byte 3: Data offset
* Byte 4: Flow control bits, reserved for Tx
* Byte 5: Maximum Sequence number allowed by firmware for Tx, N/A for Tx packet
* Byte 6~7: Reserved
*/
#define SDPCM_HWHDR_LEN 4
#define SDPCM_SWHDR_LEN 8
#define SDPCM_HDRLEN (SDPCM_HWHDR_LEN + SDPCM_SWHDR_LEN)
#define SDPCM_RESERVE (SDPCM_HDRLEN + BRCMF_SDALIGN)
/* software header */
#define SDPCM_SEQ_MASK 0x000000ff
#define SDPCM_SEQ_WRAP 256
#define SDPCM_CHANNEL_MASK 0x00000f00
#define SDPCM_CHANNEL_SHIFT 8
#define SDPCM_CONTROL_CHANNEL 0 /* Control */
#define SDPCM_EVENT_CHANNEL 1 /* Asyc Event Indication */
#define SDPCM_DATA_CHANNEL 2 /* Data Xmit/Recv */
#define SDPCM_GLOM_CHANNEL 3 /* Coalesced packets */
#define SDPCM_TEST_CHANNEL 15 /* Test/debug packets */
#define SDPCM_GLOMDESC(p) (((u8 *)p)[1] & 0x80)
#define SDPCM_NEXTLEN_MASK 0x00ff0000
#define SDPCM_NEXTLEN_SHIFT 16
#define SDPCM_DOFFSET_MASK 0xff000000
#define SDPCM_DOFFSET_SHIFT 24
#define SDPCM_FCMASK_MASK 0x000000ff
#define SDPCM_WINDOW_MASK 0x0000ff00
#define SDPCM_WINDOW_SHIFT 8
static inline u8 brcmf_sdio_getdatoffset(u8 *swheader)
{
u32 hdrvalue;
hdrvalue = *(u32 *)swheader;
return (u8)((hdrvalue & SDPCM_DOFFSET_MASK) >> SDPCM_DOFFSET_SHIFT);
}
static int brcmf_sdio_hdparse(struct brcmf_sdio *bus, u8 *header,
struct brcmf_sdio_hdrinfo *rd,
enum brcmf_sdio_frmtype type)
{
u16 len, checksum;
u8 rx_seq, fc, tx_seq_max;
u32 swheader;
/*
* 4 bytes hardware header (frame tag)
* Byte 0~1: Frame length
* Byte 2~3: Checksum, bit-wise inverse of frame length
*/
/* hw header */
len = get_unaligned_le16(header);
checksum = get_unaligned_le16(header + sizeof(u16));
/* All zero means no more to read */
@ -1082,24 +1089,16 @@ static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
}
rd->len = len;
/*
* 8 bytes hardware header
* Byte 0: Rx sequence number
* Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
* Byte 2: Length of next data frame
* Byte 3: Data offset
* Byte 4: Flow control bits
* Byte 5: Maximum Sequence number allow for Tx
* Byte 6~7: Reserved
*/
if (type == BRCMF_SDIO_FT_SUPER &&
SDPCM_GLOMDESC(&header[SDPCM_FRAMETAG_LEN])) {
/* software header */
header += SDPCM_HWHDR_LEN;
swheader = le32_to_cpu(*(__le32 *)header);
if (type == BRCMF_SDIO_FT_SUPER && SDPCM_GLOMDESC(header)) {
brcmf_err("Glom descriptor found in superframe head\n");
rd->len = 0;
return -EINVAL;
}
rx_seq = SDPCM_PACKET_SEQUENCE(&header[SDPCM_FRAMETAG_LEN]);
rd->channel = SDPCM_PACKET_CHANNEL(&header[SDPCM_FRAMETAG_LEN]);
rx_seq = (u8)(swheader & SDPCM_SEQ_MASK);
rd->channel = (swheader & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT;
if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
type != BRCMF_SDIO_FT_SUPER) {
brcmf_err("HW header length too long\n");
@ -1119,7 +1118,7 @@ static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
rd->len = 0;
return -EINVAL;
}
rd->dat_offset = SDPCM_DOFFSET_VALUE(&header[SDPCM_FRAMETAG_LEN]);
rd->dat_offset = brcmf_sdio_getdatoffset(header);
if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
brcmf_err("seq %d: bad data offset\n", rx_seq);
bus->sdcnt.rx_badhdr++;
@ -1136,14 +1135,15 @@ static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
/* no need to check the reset for subframe */
if (type == BRCMF_SDIO_FT_SUB)
return 0;
rd->len_nxtfrm = header[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
rd->len_nxtfrm = (swheader & SDPCM_NEXTLEN_MASK) >> SDPCM_NEXTLEN_SHIFT;
if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
/* only warm for NON glom packet */
if (rd->channel != SDPCM_GLOM_CHANNEL)
brcmf_err("seq %d: next length error\n", rx_seq);
rd->len_nxtfrm = 0;
}
fc = SDPCM_FCMASK_VALUE(&header[SDPCM_FRAMETAG_LEN]);
swheader = le32_to_cpu(*(__le32 *)(header + 4));
fc = swheader & SDPCM_FCMASK_MASK;
if (bus->flowcontrol != fc) {
if (~bus->flowcontrol & fc)
bus->sdcnt.fc_xoff++;
@ -1152,7 +1152,7 @@ static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
bus->sdcnt.fc_rcvd++;
bus->flowcontrol = fc;
}
tx_seq_max = SDPCM_WINDOW_VALUE(&header[SDPCM_FRAMETAG_LEN]);
tx_seq_max = (swheader & SDPCM_WINDOW_MASK) >> SDPCM_WINDOW_SHIFT;
if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
brcmf_err("seq %d: max tx seq number error\n", rx_seq);
tx_seq_max = bus->tx_seq + 2;
@ -1162,6 +1162,28 @@ static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
return 0;
}
static inline void brcmf_sdio_update_hwhdr(u8 *header, u16 frm_length)
{
*(__le16 *)header = cpu_to_le16(frm_length);
*(((__le16 *)header) + 1) = cpu_to_le16(~frm_length);
}
static void brcmf_sdio_hdpack(struct brcmf_sdio *bus, u8 *header,
struct brcmf_sdio_hdrinfo *hd_info)
{
u32 sw_header;
brcmf_sdio_update_hwhdr(header, hd_info->len);
sw_header = bus->tx_seq;
sw_header |= (hd_info->channel << SDPCM_CHANNEL_SHIFT) &
SDPCM_CHANNEL_MASK;
sw_header |= (hd_info->dat_offset << SDPCM_DOFFSET_SHIFT) &
SDPCM_DOFFSET_MASK;
*(((__le32 *)header) + 1) = cpu_to_le32(sw_header);
*(((__le32 *)header) + 2) = 0;
}
static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
{
u16 dlen, totlen;
@ -1173,7 +1195,7 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
int errcode;
u8 doff, sfdoff;
struct brcmf_sdio_read rd_new;
struct brcmf_sdio_hdrinfo rd_new;
/* If packets, issue read(s) and send up packet chain */
/* Return sequence numbers consumed? */
@ -1309,8 +1331,8 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
rd_new.seq_num = rxseq;
rd_new.len = dlen;
sdio_claim_host(bus->sdiodev->func[1]);
errcode = brcmf_sdio_hdparser(bus, pfirst->data, &rd_new,
BRCMF_SDIO_FT_SUPER);
errcode = brcmf_sdio_hdparse(bus, pfirst->data, &rd_new,
BRCMF_SDIO_FT_SUPER);
sdio_release_host(bus->sdiodev->func[1]);
bus->cur_read.len = rd_new.len_nxtfrm << 4;
@ -1328,8 +1350,8 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
rd_new.len = pnext->len;
rd_new.seq_num = rxseq++;
sdio_claim_host(bus->sdiodev->func[1]);
errcode = brcmf_sdio_hdparser(bus, pnext->data, &rd_new,
BRCMF_SDIO_FT_SUB);
errcode = brcmf_sdio_hdparse(bus, pnext->data, &rd_new,
BRCMF_SDIO_FT_SUB);
sdio_release_host(bus->sdiodev->func[1]);
brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
pnext->data, 32, "subframe:\n");
@ -1361,7 +1383,7 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
dptr = (u8 *) (pfirst->data);
sublen = get_unaligned_le16(dptr);
doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
doff = brcmf_sdio_getdatoffset(&dptr[SDPCM_HWHDR_LEN]);
brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
dptr, pfirst->len,
@ -1539,7 +1561,7 @@ static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
uint rxleft = 0; /* Remaining number of frames allowed */
int ret; /* Return code from calls */
uint rxcount = 0; /* Total frames read */
struct brcmf_sdio_read *rd = &bus->cur_read, rd_new;
struct brcmf_sdio_hdrinfo *rd = &bus->cur_read, rd_new;
u8 head_read = 0;
brcmf_dbg(TRACE, "Enter\n");
@ -1587,8 +1609,8 @@ static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
bus->rxhdr, SDPCM_HDRLEN,
"RxHdr:\n");
if (brcmf_sdio_hdparser(bus, bus->rxhdr, rd,
BRCMF_SDIO_FT_NORMAL)) {
if (brcmf_sdio_hdparse(bus, bus->rxhdr, rd,
BRCMF_SDIO_FT_NORMAL)) {
sdio_release_host(bus->sdiodev->func[1]);
if (!bus->rxpending)
break;
@ -1652,8 +1674,8 @@ static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
rd_new.seq_num = rd->seq_num;
sdio_claim_host(bus->sdiodev->func[1]);
if (brcmf_sdio_hdparser(bus, bus->rxhdr, &rd_new,
BRCMF_SDIO_FT_NORMAL)) {
if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new,
BRCMF_SDIO_FT_NORMAL)) {
rd->len = 0;
brcmu_pkt_buf_free_skb(pkt);
}
@ -1697,7 +1719,7 @@ static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
/* Save superframe descriptor and allocate packet frame */
if (rd->channel == SDPCM_GLOM_CHANNEL) {
if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_FRAMETAG_LEN])) {
if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_HWHDR_LEN])) {
brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
rd->len);
brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
@ -1783,13 +1805,12 @@ static int
brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
uint chan)
{
u16 head_pad, tail_pad, tail_chop, pkt_len;
u16 head_align, sg_align;
u32 sw_header;
u16 head_pad, tail_pad, tail_chop, head_align, sg_align;
int ntail;
struct sk_buff *pkt_next, *pkt_new;
u8 *dat_buf;
unsigned blksize = bus->sdiodev->func[SDIO_FUNC_2]->cur_blksize;
struct brcmf_sdio_hdrinfo hd_info = {0};
/* SDIO ADMA requires at least 32 bit alignment */
head_align = 4;
@ -1848,34 +1869,18 @@ brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq,
}
/* Now prep the header */
/* 4 bytes hardware header (frame tag)
* Byte 0~1: Frame length
* Byte 2~3: Checksum, bit-wise inverse of frame length
*/
if (pkt_new)
pkt_len = pkt_next->len + tail_chop;
hd_info.len = pkt_next->len + tail_chop;
else
pkt_len = pkt_next->len - tail_pad;
*(__le16 *)dat_buf = cpu_to_le16(pkt_len);
*(((__le16 *)dat_buf) + 1) = cpu_to_le16(~pkt_len);
/* 8 bytes software header
* Byte 0: Tx sequence number
* Byte 1: 4 MSB Channel number
* Byte 2: Reserved
* Byte 3: Data offset
* Byte 4~7: Reserved
*/
sw_header = bus->tx_seq;
sw_header |= ((chan << SDPCM_CHANNEL_SHIFT) & SDPCM_CHANNEL_MASK);
sw_header |= ((head_pad + SDPCM_HDRLEN) << SDPCM_DOFFSET_SHIFT) &
SDPCM_DOFFSET_MASK;
*(((__le32 *)dat_buf) + 1) = cpu_to_le32(sw_header);
*(((__le32 *)dat_buf) + 2) = 0;
hd_info.len = pkt_next->len - tail_pad;
hd_info.channel = chan;
hd_info.dat_offset = head_pad + SDPCM_HDRLEN;
brcmf_sdio_hdpack(bus, dat_buf, &hd_info);
if (BRCMF_BYTES_ON() &&
((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
(BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)))
brcmf_dbg_hex_dump(true, pkt_next, pkt_len, "Tx Frame:\n");
brcmf_dbg_hex_dump(true, pkt_next, hd_info.len, "Tx Frame:\n");
else if (BRCMF_HDRS_ON())
brcmf_dbg_hex_dump(true, pkt_next, head_pad + SDPCM_HDRLEN,
"Tx Header:\n");
@ -1913,7 +1918,7 @@ brcmf_sdio_txpkt_postp(struct brcmf_sdio *bus, struct sk_buff_head *pktq)
__skb_unlink(pkt_next, pktq);
brcmu_pkt_buf_free_skb(pkt_next);
} else {
hdr = pkt_next->data + SDPCM_FRAMETAG_LEN;
hdr = pkt_next->data + SDPCM_HWHDR_LEN;
dat_offset = le32_to_cpu(*(__le32 *)hdr);
dat_offset = (dat_offset & SDPCM_DOFFSET_MASK) >>
SDPCM_DOFFSET_SHIFT;
@ -1969,7 +1974,7 @@ static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
}
sdio_release_host(bus->sdiodev->func[1]);
if (ret == 0)
bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
done:
brcmf_sdio_txpkt_postp(bus, &localq);
@ -2325,7 +2330,7 @@ static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
}
} else {
bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
}
sdio_release_host(bus->sdiodev->func[1]);
bus->ctrl_frame_stat = false;
@ -2540,7 +2545,7 @@ static int brcmf_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
return ret;
}
bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQ_WRAP;
return ret;
}
@ -2550,13 +2555,13 @@ brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
{
u8 *frame;
u16 len;
u32 swheader;
uint retries = 0;
u8 doff = 0;
int ret = -1;
struct brcmf_bus *bus_if = dev_get_drvdata(dev);
struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
struct brcmf_sdio *bus = sdiodev->bus;
struct brcmf_sdio_hdrinfo hd_info = {0};
brcmf_dbg(TRACE, "Enter\n");
@ -2595,18 +2600,10 @@ brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
brcmf_sdbrcm_bus_sleep(bus, false, false);
sdio_release_host(bus->sdiodev->func[1]);
/* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
*(__le16 *) frame = cpu_to_le16((u16) msglen);
*(((__le16 *) frame) + 1) = cpu_to_le16(~msglen);
/* Software tag: channel, sequence number, data offset */
swheader =
((SDPCM_CONTROL_CHANNEL << SDPCM_CHANNEL_SHIFT) &
SDPCM_CHANNEL_MASK)
| bus->tx_seq | ((doff << SDPCM_DOFFSET_SHIFT) &
SDPCM_DOFFSET_MASK);
put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
hd_info.len = (u16)msglen;
hd_info.channel = SDPCM_CONTROL_CHANNEL;
hd_info.dat_offset = doff;
brcmf_sdio_hdpack(bus, frame, &hd_info);
if (!data_ok(bus)) {
brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
@ -3856,7 +3853,7 @@ void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev)
bus->txbound = BRCMF_TXBOUND;
bus->rxbound = BRCMF_RXBOUND;
bus->txminmax = BRCMF_TXMINMAX;
bus->tx_seq = SDPCM_SEQUENCE_WRAP - 1;
bus->tx_seq = SDPCM_SEQ_WRAP - 1;
INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");