M7350/kernel/drivers/net/wireless/bcmdhd/dhd_bta.c

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2024-09-09 08:52:07 +00:00
/*
* BT-AMP support routines
*
* Copyright (C) 1999-2012, Broadcom Corporation
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a license
* other than the GPL, without Broadcom's express prior written consent.
*
* $Id: dhd_bta.c 303834 2011-12-20 06:17:39Z $
*/
#ifndef WLBTAMP
#error "WLBTAMP is not defined"
#endif /* WLBTAMP */
#include <typedefs.h>
#include <osl.h>
#include <bcmcdc.h>
#include <bcmutils.h>
#include <bcmendian.h>
#include <proto/802.11.h>
#include <proto/802.11_bta.h>
#include <proto/bt_amp_hci.h>
#include <dngl_stats.h>
#include <dhd.h>
#include <dhd_bus.h>
#include <dhd_proto.h>
#include <dhdioctl.h>
#include <dhd_dbg.h>
#include <dhd_bta.h>
#ifdef SEND_HCI_CMD_VIA_IOCTL
#define BTA_HCI_CMD_MAX_LEN HCI_CMD_PREAMBLE_SIZE + HCI_CMD_DATA_SIZE
/* Send HCI cmd via wl iovar HCI_cmd to the dongle. */
int
dhd_bta_docmd(dhd_pub_t *pub, void *cmd_buf, uint cmd_len)
{
amp_hci_cmd_t *cmd = (amp_hci_cmd_t *)cmd_buf;
uint8 buf[BTA_HCI_CMD_MAX_LEN + 16];
uint len = sizeof(buf);
wl_ioctl_t ioc;
if (cmd_len < HCI_CMD_PREAMBLE_SIZE)
return BCME_BADLEN;
if ((uint)cmd->plen + HCI_CMD_PREAMBLE_SIZE > cmd_len)
return BCME_BADLEN;
len = bcm_mkiovar("HCI_cmd",
(char *)cmd, (uint)cmd->plen + HCI_CMD_PREAMBLE_SIZE, (char *)buf, len);
memset(&ioc, 0, sizeof(ioc));
ioc.cmd = WLC_SET_VAR;
ioc.buf = buf;
ioc.len = len;
ioc.set = TRUE;
return dhd_wl_ioctl(pub, &ioc, ioc.buf, ioc.len);
}
#else /* !SEND_HCI_CMD_VIA_IOCTL */
static void
dhd_bta_flush_hcidata(dhd_pub_t *pub, uint16 llh)
{
int prec;
struct pktq *q;
uint count = 0;
q = dhd_bus_txq(pub->bus);
if (q == NULL)
return;
DHD_BTA(("dhd: flushing HCI ACL data for logical link %u...\n", llh));
dhd_os_sdlock_txq(pub);
/* Walk through the txq and toss all HCI ACL data packets */
PKTQ_PREC_ITER(q, prec) {
void *head_pkt = NULL;
while (pktq_ppeek(q, prec) != head_pkt) {
void *pkt = pktq_pdeq(q, prec);
int ifidx;
PKTPULL(pub->osh, pkt, dhd_bus_hdrlen(pub->bus));
dhd_prot_hdrpull(pub, &ifidx, pkt, NULL, NULL);
if (PKTLEN(pub->osh, pkt) >= RFC1042_HDR_LEN) {
struct ether_header *eh =
(struct ether_header *)PKTDATA(pub->osh, pkt);
if (ntoh16(eh->ether_type) < ETHER_TYPE_MIN) {
struct dot11_llc_snap_header *lsh =
(struct dot11_llc_snap_header *)&eh[1];
if (bcmp(lsh, BT_SIG_SNAP_MPROT,
DOT11_LLC_SNAP_HDR_LEN - 2) == 0 &&
ntoh16(lsh->type) == BTA_PROT_L2CAP) {
amp_hci_ACL_data_t *ACL_data =
(amp_hci_ACL_data_t *)&lsh[1];
uint16 handle = ltoh16(ACL_data->handle);
if (HCI_ACL_DATA_HANDLE(handle) == llh) {
PKTFREE(pub->osh, pkt, TRUE);
count ++;
continue;
}
}
}
}
dhd_prot_hdrpush(pub, ifidx, pkt);
PKTPUSH(pub->osh, pkt, dhd_bus_hdrlen(pub->bus));
if (head_pkt == NULL)
head_pkt = pkt;
pktq_penq(q, prec, pkt);
}
}
dhd_os_sdunlock_txq(pub);
DHD_BTA(("dhd: flushed %u packet(s) for logical link %u...\n", count, llh));
}
/* Handle HCI cmd locally.
* Return 0: continue to send the cmd across SDIO
* < 0: stop, fail
* > 0: stop, succuess
*/
static int
_dhd_bta_docmd(dhd_pub_t *pub, amp_hci_cmd_t *cmd)
{
int status = 0;
switch (ltoh16_ua((uint8 *)&cmd->opcode)) {
case HCI_Enhanced_Flush: {
eflush_cmd_parms_t *cmdparms = (eflush_cmd_parms_t *)cmd->parms;
dhd_bta_flush_hcidata(pub, ltoh16_ua(cmdparms->llh));
break;
}
default:
break;
}
return status;
}
/* Send HCI cmd encapsulated in BT-SIG frame via data channel to the dongle. */
int
dhd_bta_docmd(dhd_pub_t *pub, void *cmd_buf, uint cmd_len)
{
amp_hci_cmd_t *cmd = (amp_hci_cmd_t *)cmd_buf;
struct ether_header *eh;
struct dot11_llc_snap_header *lsh;
osl_t *osh = pub->osh;
uint len;
void *p;
int status;
if (cmd_len < HCI_CMD_PREAMBLE_SIZE) {
DHD_ERROR(("dhd_bta_docmd: short command, cmd_len %u\n", cmd_len));
return BCME_BADLEN;
}
if ((len = (uint)cmd->plen + HCI_CMD_PREAMBLE_SIZE) > cmd_len) {
DHD_ERROR(("dhd_bta_docmd: malformed command, len %u cmd_len %u\n",
len, cmd_len));
/* return BCME_BADLEN; */
}
p = PKTGET(osh, pub->hdrlen + RFC1042_HDR_LEN + len, TRUE);
if (p == NULL) {
DHD_ERROR(("dhd_bta_docmd: out of memory\n"));
return BCME_NOMEM;
}
/* intercept and handle the HCI cmd locally */
if ((status = _dhd_bta_docmd(pub, cmd)) > 0)
return 0;
else if (status < 0)
return status;
/* copy in HCI cmd */
PKTPULL(osh, p, pub->hdrlen + RFC1042_HDR_LEN);
bcopy(cmd, PKTDATA(osh, p), len);
/* copy in partial Ethernet header with BT-SIG LLC/SNAP header */
PKTPUSH(osh, p, RFC1042_HDR_LEN);
eh = (struct ether_header *)PKTDATA(osh, p);
bzero(eh->ether_dhost, ETHER_ADDR_LEN);
ETHER_SET_LOCALADDR(eh->ether_dhost);
bcopy(&pub->mac, eh->ether_shost, ETHER_ADDR_LEN);
eh->ether_type = hton16(len + DOT11_LLC_SNAP_HDR_LEN);
lsh = (struct dot11_llc_snap_header *)&eh[1];
bcopy(BT_SIG_SNAP_MPROT, lsh, DOT11_LLC_SNAP_HDR_LEN - 2);
lsh->type = 0;
return dhd_sendpkt(pub, 0, p);
}
#endif /* !SEND_HCI_CMD_VIA_IOCTL */
/* Send HCI ACL data to dongle via data channel */
int
dhd_bta_tx_hcidata(dhd_pub_t *pub, void *data_buf, uint data_len)
{
amp_hci_ACL_data_t *data = (amp_hci_ACL_data_t *)data_buf;
struct ether_header *eh;
struct dot11_llc_snap_header *lsh;
osl_t *osh = pub->osh;
uint len;
void *p;
if (data_len < HCI_ACL_DATA_PREAMBLE_SIZE) {
DHD_ERROR(("dhd_bta_tx_hcidata: short data_buf, data_len %u\n", data_len));
return BCME_BADLEN;
}
if ((len = (uint)ltoh16(data->dlen) + HCI_ACL_DATA_PREAMBLE_SIZE) > data_len) {
DHD_ERROR(("dhd_bta_tx_hcidata: malformed hci data, len %u data_len %u\n",
len, data_len));
/* return BCME_BADLEN; */
}
p = PKTGET(osh, pub->hdrlen + RFC1042_HDR_LEN + len, TRUE);
if (p == NULL) {
DHD_ERROR(("dhd_bta_tx_hcidata: out of memory\n"));
return BCME_NOMEM;
}
/* copy in HCI ACL data header and HCI ACL data */
PKTPULL(osh, p, pub->hdrlen + RFC1042_HDR_LEN);
bcopy(data, PKTDATA(osh, p), len);
/* copy in partial Ethernet header with BT-SIG LLC/SNAP header */
PKTPUSH(osh, p, RFC1042_HDR_LEN);
eh = (struct ether_header *)PKTDATA(osh, p);
bzero(eh->ether_dhost, ETHER_ADDR_LEN);
bcopy(&pub->mac, eh->ether_shost, ETHER_ADDR_LEN);
eh->ether_type = hton16(len + DOT11_LLC_SNAP_HDR_LEN);
lsh = (struct dot11_llc_snap_header *)&eh[1];
bcopy(BT_SIG_SNAP_MPROT, lsh, DOT11_LLC_SNAP_HDR_LEN - 2);
lsh->type = HTON16(BTA_PROT_L2CAP);
return dhd_sendpkt(pub, 0, p);
}
/* txcomplete callback */
void
dhd_bta_tx_hcidata_complete(dhd_pub_t *dhdp, void *txp, bool success)
{
uint8 *pktdata = (uint8 *)PKTDATA(dhdp->osh, txp);
amp_hci_ACL_data_t *ACL_data = (amp_hci_ACL_data_t *)(pktdata + RFC1042_HDR_LEN);
uint16 handle = ltoh16(ACL_data->handle);
uint16 llh = HCI_ACL_DATA_HANDLE(handle);
wl_event_msg_t event;
uint8 data[HCI_EVT_PREAMBLE_SIZE + sizeof(num_completed_data_blocks_evt_parms_t)];
amp_hci_event_t *evt;
num_completed_data_blocks_evt_parms_t *parms;
uint16 len = HCI_EVT_PREAMBLE_SIZE + sizeof(num_completed_data_blocks_evt_parms_t);
/* update the event struct */
memset(&event, 0, sizeof(event));
event.version = hton16(BCM_EVENT_MSG_VERSION);
event.event_type = hton32(WLC_E_BTA_HCI_EVENT);
event.status = 0;
event.reason = 0;
event.auth_type = 0;
event.datalen = hton32(len);
event.flags = 0;
/* generate Number of Completed Blocks event */
evt = (amp_hci_event_t *)data;
evt->ecode = HCI_Number_of_Completed_Data_Blocks;
evt->plen = sizeof(num_completed_data_blocks_evt_parms_t);
parms = (num_completed_data_blocks_evt_parms_t *)evt->parms;
htol16_ua_store(dhdp->maxdatablks, (uint8 *)&parms->num_blocks);
parms->num_handles = 1;
htol16_ua_store(llh, (uint8 *)&parms->completed[0].handle);
parms->completed[0].pkts = 1;
parms->completed[0].blocks = 1;
dhd_sendup_event_common(dhdp, &event, data);
}
/* event callback */
void
dhd_bta_doevt(dhd_pub_t *dhdp, void *data_buf, uint data_len)
{
amp_hci_event_t *evt = (amp_hci_event_t *)data_buf;
switch (evt->ecode) {
case HCI_Command_Complete: {
cmd_complete_parms_t *parms = (cmd_complete_parms_t *)evt->parms;
switch (ltoh16_ua((uint8 *)&parms->opcode)) {
case HCI_Read_Data_Block_Size: {
read_data_block_size_evt_parms_t *parms2 =
(read_data_block_size_evt_parms_t *)parms->parms;
dhdp->maxdatablks = ltoh16_ua((uint8 *)&parms2->data_block_num);
break;
}
}
break;
}
case HCI_Flush_Occurred: {
flush_occurred_evt_parms_t *evt_parms = (flush_occurred_evt_parms_t *)evt->parms;
dhd_bta_flush_hcidata(dhdp, ltoh16_ua((uint8 *)&evt_parms->handle));
break;
}
default:
break;
}
}