diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/bcdc.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/bcdc.c | 389 |
1 files changed, 0 insertions, 389 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcdc.c b/drivers/net/wireless/brcm80211/brcmfmac/bcdc.c deleted file mode 100644 index 288c84e7c..000000000 --- a/drivers/net/wireless/brcm80211/brcmfmac/bcdc.c +++ /dev/null @@ -1,389 +0,0 @@ -/* - * Copyright (c) 2010 Broadcom Corporation - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY - * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION - * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN - * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -/******************************************************************************* - * Communicates with the dongle by using dcmd codes. - * For certain dcmd codes, the dongle interprets string data from the host. - ******************************************************************************/ - -#include <linux/types.h> -#include <linux/netdevice.h> - -#include <brcmu_utils.h> -#include <brcmu_wifi.h> - -#include "core.h" -#include "bus.h" -#include "fwsignal.h" -#include "debug.h" -#include "tracepoint.h" -#include "proto.h" -#include "bcdc.h" - -struct brcmf_proto_bcdc_dcmd { - __le32 cmd; /* dongle command value */ - __le32 len; /* lower 16: output buflen; - * upper 16: input buflen (excludes header) */ - __le32 flags; /* flag defns given below */ - __le32 status; /* status code returned from the device */ -}; - -/* BCDC flag definitions */ -#define BCDC_DCMD_ERROR 0x01 /* 1=cmd failed */ -#define BCDC_DCMD_SET 0x02 /* 0=get, 1=set cmd */ -#define BCDC_DCMD_IF_MASK 0xF000 /* I/F index */ -#define BCDC_DCMD_IF_SHIFT 12 -#define BCDC_DCMD_ID_MASK 0xFFFF0000 /* id an cmd pairing */ -#define BCDC_DCMD_ID_SHIFT 16 /* ID Mask shift bits */ -#define BCDC_DCMD_ID(flags) \ - (((flags) & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT) - -/* - * BCDC header - Broadcom specific extension of CDC. - * Used on data packets to convey priority across USB. - */ -#define BCDC_HEADER_LEN 4 -#define BCDC_PROTO_VER 2 /* Protocol version */ -#define BCDC_FLAG_VER_MASK 0xf0 /* Protocol version mask */ -#define BCDC_FLAG_VER_SHIFT 4 /* Protocol version shift */ -#define BCDC_FLAG_SUM_GOOD 0x04 /* Good RX checksums */ -#define BCDC_FLAG_SUM_NEEDED 0x08 /* Dongle needs to do TX checksums */ -#define BCDC_PRIORITY_MASK 0x7 -#define BCDC_FLAG2_IF_MASK 0x0f /* packet rx interface in APSTA */ -#define BCDC_FLAG2_IF_SHIFT 0 - -#define BCDC_GET_IF_IDX(hdr) \ - ((int)((((hdr)->flags2) & BCDC_FLAG2_IF_MASK) >> BCDC_FLAG2_IF_SHIFT)) -#define BCDC_SET_IF_IDX(hdr, idx) \ - ((hdr)->flags2 = (((hdr)->flags2 & ~BCDC_FLAG2_IF_MASK) | \ - ((idx) << BCDC_FLAG2_IF_SHIFT))) - -/** - * struct brcmf_proto_bcdc_header - BCDC header format - * - * @flags: flags contain protocol and checksum info. - * @priority: 802.1d priority and USB flow control info (bit 4:7). - * @flags2: additional flags containing dongle interface index. - * @data_offset: start of packet data. header is following by firmware signals. - */ -struct brcmf_proto_bcdc_header { - u8 flags; - u8 priority; - u8 flags2; - u8 data_offset; -}; - -/* - * maximum length of firmware signal data between - * the BCDC header and packet data in the tx path. - */ -#define BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES 12 - -#define RETRIES 2 /* # of retries to retrieve matching dcmd response */ -#define BUS_HEADER_LEN (16+64) /* Must be atleast SDPCM_RESERVE - * (amount of header tha might be added) - * plus any space that might be needed - * for bus alignment padding. - */ -struct brcmf_bcdc { - u16 reqid; - u8 bus_header[BUS_HEADER_LEN]; - struct brcmf_proto_bcdc_dcmd msg; - unsigned char buf[BRCMF_DCMD_MAXLEN]; -}; - - -static int -brcmf_proto_bcdc_msg(struct brcmf_pub *drvr, int ifidx, uint cmd, void *buf, - uint len, bool set) -{ - struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; - struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg; - u32 flags; - - brcmf_dbg(BCDC, "Enter\n"); - - memset(msg, 0, sizeof(struct brcmf_proto_bcdc_dcmd)); - - msg->cmd = cpu_to_le32(cmd); - msg->len = cpu_to_le32(len); - flags = (++bcdc->reqid << BCDC_DCMD_ID_SHIFT); - if (set) - flags |= BCDC_DCMD_SET; - flags = (flags & ~BCDC_DCMD_IF_MASK) | - (ifidx << BCDC_DCMD_IF_SHIFT); - msg->flags = cpu_to_le32(flags); - - if (buf) - memcpy(bcdc->buf, buf, len); - - len += sizeof(*msg); - if (len > BRCMF_TX_IOCTL_MAX_MSG_SIZE) - len = BRCMF_TX_IOCTL_MAX_MSG_SIZE; - - /* Send request */ - return brcmf_bus_txctl(drvr->bus_if, (unsigned char *)&bcdc->msg, len); -} - -static int brcmf_proto_bcdc_cmplt(struct brcmf_pub *drvr, u32 id, u32 len) -{ - int ret; - struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; - - brcmf_dbg(BCDC, "Enter\n"); - len += sizeof(struct brcmf_proto_bcdc_dcmd); - do { - ret = brcmf_bus_rxctl(drvr->bus_if, (unsigned char *)&bcdc->msg, - len); - if (ret < 0) - break; - } while (BCDC_DCMD_ID(le32_to_cpu(bcdc->msg.flags)) != id); - - return ret; -} - -static int -brcmf_proto_bcdc_query_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd, - void *buf, uint len) -{ - struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; - struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg; - void *info; - int ret = 0, retries = 0; - u32 id, flags; - - brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len); - - ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, false); - if (ret < 0) { - brcmf_err("brcmf_proto_bcdc_msg failed w/status %d\n", - ret); - goto done; - } - -retry: - /* wait for interrupt and get first fragment */ - ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len); - if (ret < 0) - goto done; - - flags = le32_to_cpu(msg->flags); - id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT; - - if ((id < bcdc->reqid) && (++retries < RETRIES)) - goto retry; - if (id != bcdc->reqid) { - brcmf_err("%s: unexpected request id %d (expected %d)\n", - brcmf_ifname(drvr, ifidx), id, bcdc->reqid); - ret = -EINVAL; - goto done; - } - - /* Check info buffer */ - info = (void *)&msg[1]; - - /* Copy info buffer */ - if (buf) { - if (ret < (int)len) - len = ret; - memcpy(buf, info, len); - } - - /* Check the ERROR flag */ - if (flags & BCDC_DCMD_ERROR) - ret = le32_to_cpu(msg->status); - -done: - return ret; -} - -static int -brcmf_proto_bcdc_set_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd, - void *buf, uint len) -{ - struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; - struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg; - int ret = 0; - u32 flags, id; - - brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len); - - ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, true); - if (ret < 0) - goto done; - - ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len); - if (ret < 0) - goto done; - - flags = le32_to_cpu(msg->flags); - id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT; - - if (id != bcdc->reqid) { - brcmf_err("%s: unexpected request id %d (expected %d)\n", - brcmf_ifname(drvr, ifidx), id, bcdc->reqid); - ret = -EINVAL; - goto done; - } - - /* Check the ERROR flag */ - if (flags & BCDC_DCMD_ERROR) - ret = le32_to_cpu(msg->status); - -done: - return ret; -} - -static void -brcmf_proto_bcdc_hdrpush(struct brcmf_pub *drvr, int ifidx, u8 offset, - struct sk_buff *pktbuf) -{ - struct brcmf_proto_bcdc_header *h; - - brcmf_dbg(BCDC, "Enter\n"); - - /* Push BDC header used to convey priority for buses that don't */ - skb_push(pktbuf, BCDC_HEADER_LEN); - - h = (struct brcmf_proto_bcdc_header *)(pktbuf->data); - - h->flags = (BCDC_PROTO_VER << BCDC_FLAG_VER_SHIFT); - if (pktbuf->ip_summed == CHECKSUM_PARTIAL) - h->flags |= BCDC_FLAG_SUM_NEEDED; - - h->priority = (pktbuf->priority & BCDC_PRIORITY_MASK); - h->flags2 = 0; - h->data_offset = offset; - BCDC_SET_IF_IDX(h, ifidx); - trace_brcmf_bcdchdr(pktbuf->data); -} - -static int -brcmf_proto_bcdc_hdrpull(struct brcmf_pub *drvr, bool do_fws, - struct sk_buff *pktbuf, struct brcmf_if **ifp) -{ - struct brcmf_proto_bcdc_header *h; - struct brcmf_if *tmp_if; - - brcmf_dbg(BCDC, "Enter\n"); - - /* Pop BCDC header used to convey priority for buses that don't */ - if (pktbuf->len <= BCDC_HEADER_LEN) { - brcmf_dbg(INFO, "rx data too short (%d <= %d)\n", - pktbuf->len, BCDC_HEADER_LEN); - return -EBADE; - } - - trace_brcmf_bcdchdr(pktbuf->data); - h = (struct brcmf_proto_bcdc_header *)(pktbuf->data); - - tmp_if = brcmf_get_ifp(drvr, BCDC_GET_IF_IDX(h)); - if (!tmp_if) { - brcmf_dbg(INFO, "no matching ifp found\n"); - return -EBADE; - } - if (((h->flags & BCDC_FLAG_VER_MASK) >> BCDC_FLAG_VER_SHIFT) != - BCDC_PROTO_VER) { - brcmf_err("%s: non-BCDC packet received, flags 0x%x\n", - brcmf_ifname(drvr, tmp_if->ifidx), h->flags); - return -EBADE; - } - - if (h->flags & BCDC_FLAG_SUM_GOOD) { - brcmf_dbg(BCDC, "%s: BDC rcv, good checksum, flags 0x%x\n", - brcmf_ifname(drvr, tmp_if->ifidx), h->flags); - pktbuf->ip_summed = CHECKSUM_UNNECESSARY; - } - - pktbuf->priority = h->priority & BCDC_PRIORITY_MASK; - - skb_pull(pktbuf, BCDC_HEADER_LEN); - if (do_fws) - brcmf_fws_hdrpull(tmp_if, h->data_offset << 2, pktbuf); - else - skb_pull(pktbuf, h->data_offset << 2); - - if (pktbuf->len == 0) - return -ENODATA; - - *ifp = tmp_if; - return 0; -} - -static int -brcmf_proto_bcdc_txdata(struct brcmf_pub *drvr, int ifidx, u8 offset, - struct sk_buff *pktbuf) -{ - brcmf_proto_bcdc_hdrpush(drvr, ifidx, offset, pktbuf); - return brcmf_bus_txdata(drvr->bus_if, pktbuf); -} - -static void -brcmf_proto_bcdc_configure_addr_mode(struct brcmf_pub *drvr, int ifidx, - enum proto_addr_mode addr_mode) -{ -} - -static void -brcmf_proto_bcdc_delete_peer(struct brcmf_pub *drvr, int ifidx, - u8 peer[ETH_ALEN]) -{ -} - -static void -brcmf_proto_bcdc_add_tdls_peer(struct brcmf_pub *drvr, int ifidx, - u8 peer[ETH_ALEN]) -{ -} - -int brcmf_proto_bcdc_attach(struct brcmf_pub *drvr) -{ - struct brcmf_bcdc *bcdc; - - bcdc = kzalloc(sizeof(*bcdc), GFP_ATOMIC); - if (!bcdc) - goto fail; - - /* ensure that the msg buf directly follows the cdc msg struct */ - if ((unsigned long)(&bcdc->msg + 1) != (unsigned long)bcdc->buf) { - brcmf_err("struct brcmf_proto_bcdc is not correctly defined\n"); - goto fail; - } - - drvr->proto->hdrpull = brcmf_proto_bcdc_hdrpull; - drvr->proto->query_dcmd = brcmf_proto_bcdc_query_dcmd; - drvr->proto->set_dcmd = brcmf_proto_bcdc_set_dcmd; - drvr->proto->txdata = brcmf_proto_bcdc_txdata; - drvr->proto->configure_addr_mode = brcmf_proto_bcdc_configure_addr_mode; - drvr->proto->delete_peer = brcmf_proto_bcdc_delete_peer; - drvr->proto->add_tdls_peer = brcmf_proto_bcdc_add_tdls_peer; - drvr->proto->pd = bcdc; - - drvr->hdrlen += BCDC_HEADER_LEN + BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES; - drvr->bus_if->maxctl = BRCMF_DCMD_MAXLEN + - sizeof(struct brcmf_proto_bcdc_dcmd); - return 0; - -fail: - kfree(bcdc); - return -ENOMEM; -} - -void brcmf_proto_bcdc_detach(struct brcmf_pub *drvr) -{ - kfree(drvr->proto->pd); - drvr->proto->pd = NULL; -} |