1 files changed, 535 insertions, 0 deletions

diff --git a/drivers/net/wireless/bcm4329/dhd_cdc.c b/drivers/net/wireless/bcm4329/dhd_cdc.c
new file mode 100644
index 00000000000..4bec0b606dc
--- /dev/null
+++ b/drivers/net/wireless/bcm4329/dhd_cdc.c
@@ -0,0 +1,535 @@
+/*
+ * DHD Protocol Module for CDC and BDC.
+ *
+ * Copyright (C) 1999-2010, 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_cdc.c,v 1.22.4.2.4.7.2.41 2010/06/23 19:58:18 Exp $
+ *
+ * BDC is like CDC, except it includes a header for data packets to convey
+ * packet priority over the bus, and flags (e.g. to indicate checksum status
+ * for dongle offload).
+ */
+
+#include <typedefs.h>
+#include <osl.h>
+
+#include <bcmutils.h>
+#include <bcmcdc.h>
+#include <bcmendian.h>
+
+#include <dngl_stats.h>
+#include <dhd.h>
+#include <dhd_proto.h>
+#include <dhd_bus.h>
+#include <dhd_dbg.h>
+
+extern int dhd_preinit_ioctls(dhd_pub_t *dhd);
+
+/* Packet alignment for most efficient SDIO (can change based on platform) */
+#ifndef DHD_SDALIGN
+#define DHD_SDALIGN     32
+#endif
+#if !ISPOWEROF2(DHD_SDALIGN)
+#error DHD_SDALIGN is not a power of 2!
+#endif
+
+#define RETRIES 2               /* # of retries to retrieve matching ioctl response */
+#define BUS_HEADER_LEN  (16+DHD_SDALIGN)        /* Must be atleast SDPCM_RESERVE
+                                 * defined in dhd_sdio.c (amount of header tha might be added)
+                                 * plus any space that might be needed for alignment padding.
+                                 */
+#define ROUND_UP_MARGIN 2048    /* Biggest SDIO block size possible for
+                                 * round off at the end of buffer
+                                 */
+
+typedef struct dhd_prot {
+        uint16 reqid;
+        uint8 pending;
+        uint32 lastcmd;
+        uint8 bus_header[BUS_HEADER_LEN];
+        cdc_ioctl_t msg;
+        unsigned char buf[WLC_IOCTL_MAXLEN + ROUND_UP_MARGIN];
+} dhd_prot_t;
+
+static int
+dhdcdc_msg(dhd_pub_t *dhd)
+{
+        dhd_prot_t *prot = dhd->prot;
+        int len = ltoh32(prot->msg.len) + sizeof(cdc_ioctl_t);
+        int ret;
+
+        DHD_TRACE(("%s: Enter\n", __FUNCTION__));
+
+        dhd_os_wake_lock(dhd);
+
+        /* NOTE : cdc->msg.len holds the desired length of the buffer to be
+         *        returned. Only up to CDC_MAX_MSG_SIZE of this buffer area
+         *        is actually sent to the dongle
+         */
+        if (len > CDC_MAX_MSG_SIZE)
+                len = CDC_MAX_MSG_SIZE;
+
+        /* Send request */
+        ret = dhd_bus_txctl(dhd->bus, (uchar*)&prot->msg, len);
+        dhd_os_wake_unlock(dhd);
+        return ret;
+}
+
+static int
+dhdcdc_cmplt(dhd_pub_t *dhd, uint32 id, uint32 len)
+{
+        int ret;
+        dhd_prot_t *prot = dhd->prot;
+
+        DHD_TRACE(("%s: Enter\n", __FUNCTION__));
+
+        do {
+                ret = dhd_bus_rxctl(dhd->bus, (uchar*)&prot->msg, len+sizeof(cdc_ioctl_t));
+                if (ret < 0)
+                        break;
+        } while (CDC_IOC_ID(ltoh32(prot->msg.flags)) != id);
+
+        return ret;
+}
+
+int
+dhdcdc_query_ioctl(dhd_pub_t *dhd, int ifidx, uint cmd, void *buf, uint len)
+{
+        dhd_prot_t *prot = dhd->prot;
+        cdc_ioctl_t *msg = &prot->msg;
+        void *info;
+        int ret = 0, retries = 0;
+        uint32 id, flags = 0;
+
+        DHD_TRACE(("%s: Enter\n", __FUNCTION__));
+        DHD_CTL(("%s: cmd %d len %d\n", __FUNCTION__, cmd, len));
+
+
+        /* Respond "bcmerror" and "bcmerrorstr" with local cache */
+        if (cmd == WLC_GET_VAR && buf)
+        {
+                if (!strcmp((char *)buf, "bcmerrorstr"))
+                {
+                        strncpy((char *)buf, bcmerrorstr(dhd->dongle_error), BCME_STRLEN);
+                        goto done;
+                }
+                else if (!strcmp((char *)buf, "bcmerror"))
+                {
+                        *(int *)buf = dhd->dongle_error;
+                        goto done;
+                }
+        }
+
+        memset(msg, 0, sizeof(cdc_ioctl_t));
+
+        msg->cmd = htol32(cmd);
+        msg->len = htol32(len);
+        msg->flags = (++prot->reqid << CDCF_IOC_ID_SHIFT);
+        CDC_SET_IF_IDX(msg, ifidx);
+        msg->flags = htol32(msg->flags);
+
+        if (buf)
+                memcpy(prot->buf, buf, len);
+
+        if ((ret = dhdcdc_msg(dhd)) < 0) {
+                if (!dhd->hang_was_sent)
+                        DHD_ERROR(("dhdcdc_query_ioctl: dhdcdc_msg failed w/status %d\n", ret));
+                goto done;
+        }
+
+retry:
+        /* wait for interrupt and get first fragment */
+        if ((ret = dhdcdc_cmplt(dhd, prot->reqid, len)) < 0)
+                goto done;
+
+        flags = ltoh32(msg->flags);
+        id = (flags & CDCF_IOC_ID_MASK) >> CDCF_IOC_ID_SHIFT;
+
+        if ((id < prot->reqid) && (++retries < RETRIES))
+                goto retry;
+        if (id != prot->reqid) {
+                DHD_ERROR(("%s: %s: unexpected request id %d (expected %d)\n",
+                           dhd_ifname(dhd, ifidx), __FUNCTION__, id, prot->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 & CDCF_IOC_ERROR)
+        {
+                ret = ltoh32(msg->status);
+                /* Cache error from dongle */
+                dhd->dongle_error = ret;
+        }
+
+done:
+        return ret;
+}
+
+int
+dhdcdc_set_ioctl(dhd_pub_t *dhd, int ifidx, uint cmd, void *buf, uint len)
+{
+        dhd_prot_t *prot = dhd->prot;
+        cdc_ioctl_t *msg = &prot->msg;
+        int ret = 0;
+        uint32 flags, id;
+
+        DHD_TRACE(("%s: Enter\n", __FUNCTION__));
+        DHD_CTL(("%s: cmd %d len %d\n", __FUNCTION__, cmd, len));
+
+        if (dhd->busstate == DHD_BUS_DOWN) {
+                DHD_ERROR(("%s : bus is down. we have nothing to do\n", __FUNCTION__));
+                return -EIO;
+        }
+
+        /* don't talk to the dongle if fw is about to be reloaded */
+        if (dhd->hang_was_sent) {
+                DHD_ERROR(("%s: HANG was sent up earlier. Not talking to the chip\n",
+                        __FUNCTION__));
+                return -EIO;
+        }
+
+        memset(msg, 0, sizeof(cdc_ioctl_t));
+
+        msg->cmd = htol32(cmd);
+        msg->len = htol32(len);
+        msg->flags = (++prot->reqid << CDCF_IOC_ID_SHIFT) | CDCF_IOC_SET;
+        CDC_SET_IF_IDX(msg, ifidx);
+        msg->flags = htol32(msg->flags);
+
+        if (buf)
+                memcpy(prot->buf, buf, len);
+
+        if ((ret = dhdcdc_msg(dhd)) < 0)
+                goto done;
+
+        if ((ret = dhdcdc_cmplt(dhd, prot->reqid, len)) < 0)
+                goto done;
+
+        flags = ltoh32(msg->flags);
+        id = (flags & CDCF_IOC_ID_MASK) >> CDCF_IOC_ID_SHIFT;
+
+        if (id != prot->reqid) {
+                DHD_ERROR(("%s: %s: unexpected request id %d (expected %d)\n",
+                           dhd_ifname(dhd, ifidx), __FUNCTION__, id, prot->reqid));
+                ret = -EINVAL;
+                goto done;
+        }
+
+        /* Check the ERROR flag */
+        if (flags & CDCF_IOC_ERROR)
+        {
+                ret = ltoh32(msg->status);
+                /* Cache error from dongle */
+                dhd->dongle_error = ret;
+        }
+
+done:
+        return ret;
+}
+
+extern int dhd_bus_interface(struct dhd_bus *bus, uint arg, void* arg2);
+int
+dhd_prot_ioctl(dhd_pub_t *dhd, int ifidx, wl_ioctl_t * ioc, void * buf, int len)
+{
+        dhd_prot_t *prot = dhd->prot;
+        int ret = -1;
+
+        if ((dhd->busstate == DHD_BUS_DOWN) || dhd->hang_was_sent) {
+                DHD_ERROR(("%s : bus is down. we have nothing to do\n", __FUNCTION__));
+                return ret;
+        }
+        dhd_os_proto_block(dhd);
+
+        DHD_TRACE(("%s: Enter\n", __FUNCTION__));
+
+        ASSERT(len <= WLC_IOCTL_MAXLEN);
+
+        if (len > WLC_IOCTL_MAXLEN)
+                goto done;
+
+        if (prot->pending == TRUE) {
+                DHD_TRACE(("CDC packet is pending!!!! cmd=0x%x (%lu) lastcmd=0x%x (%lu)\n",
+                        ioc->cmd, (unsigned long)ioc->cmd, prot->lastcmd,
+                        (unsigned long)prot->lastcmd));
+                if ((ioc->cmd == WLC_SET_VAR) || (ioc->cmd == WLC_GET_VAR)) {
+                        DHD_TRACE(("iovar cmd=%s\n", (char*)buf));
+                }
+                goto done;
+        }
+
+        prot->pending = TRUE;
+        prot->lastcmd = ioc->cmd;
+        if (ioc->set)
+                ret = dhdcdc_set_ioctl(dhd, ifidx, ioc->cmd, buf, len);
+        else {
+                ret = dhdcdc_query_ioctl(dhd, ifidx, ioc->cmd, buf, len);
+                if (ret > 0)
+                        ioc->used = ret - sizeof(cdc_ioctl_t);
+        }
+
+        /* Too many programs assume ioctl() returns 0 on success */
+        if (ret >= 0)
+                ret = 0;
+        else {
+                cdc_ioctl_t *msg = &prot->msg;
+                ioc->needed = ltoh32(msg->len); /* len == needed when set/query fails from dongle */
+        }
+
+        /* Intercept the wme_dp ioctl here */
+        if ((!ret) && (ioc->cmd == WLC_SET_VAR) && (!strcmp(buf, "wme_dp"))) {
+                int slen, val = 0;
+
+                slen = strlen("wme_dp") + 1;
+                if (len >= (int)(slen + sizeof(int)))
+                        bcopy(((char *)buf + slen), &val, sizeof(int));
+                dhd->wme_dp = (uint8) ltoh32(val);
+        }
+
+        prot->pending = FALSE;
+
+done:
+        dhd_os_proto_unblock(dhd);
+
+        return ret;
+}
+
+int
+dhd_prot_iovar_op(dhd_pub_t *dhdp, const char *name,
+                  void *params, int plen, void *arg, int len, bool set)
+{
+        return BCME_UNSUPPORTED;
+}
+
+void
+dhd_prot_dump(dhd_pub_t *dhdp, struct bcmstrbuf *strbuf)
+{
+        bcm_bprintf(strbuf, "Protocol CDC: reqid %d\n", dhdp->prot->reqid);
+}
+
+
+void
+dhd_prot_hdrpush(dhd_pub_t *dhd, int ifidx, void *pktbuf)
+{
+#ifdef BDC
+        struct bdc_header *h;
+#endif /* BDC */
+
+        DHD_TRACE(("%s: Enter\n", __FUNCTION__));
+
+#ifdef BDC
+        /* Push BDC header used to convey priority for buses that don't */
+
+
+        PKTPUSH(dhd->osh, pktbuf, BDC_HEADER_LEN);
+
+        h = (struct bdc_header *)PKTDATA(dhd->osh, pktbuf);
+
+        h->flags = (BDC_PROTO_VER << BDC_FLAG_VER_SHIFT);
+        if (PKTSUMNEEDED(pktbuf))
+                h->flags |= BDC_FLAG_SUM_NEEDED;
+
+
+        h->priority = (PKTPRIO(pktbuf) & BDC_PRIORITY_MASK);
+        h->flags2 = 0;
+        h->rssi = 0;
+#endif /* BDC */
+        BDC_SET_IF_IDX(h, ifidx);
+}
+
+
+bool
+dhd_proto_fcinfo(dhd_pub_t *dhd, void *pktbuf, uint8 *fcbits)
+{
+#ifdef BDC
+        struct bdc_header *h;
+
+        if (PKTLEN(dhd->osh, pktbuf) < BDC_HEADER_LEN) {
+                DHD_ERROR(("%s: rx data too short (%d < %d)\n",
+                        __FUNCTION__, PKTLEN(dhd->osh, pktbuf), BDC_HEADER_LEN));
+                return BCME_ERROR;
+        }
+
+        h = (struct bdc_header *)PKTDATA(dhd->osh, pktbuf);
+
+        *fcbits = h->priority >> BDC_PRIORITY_FC_SHIFT;
+        if ((h->flags2 & BDC_FLAG2_FC_FLAG) == BDC_FLAG2_FC_FLAG)
+                return TRUE;
+#endif
+        return FALSE;
+}
+
+
+int
+dhd_prot_hdrpull(dhd_pub_t *dhd, int *ifidx, void *pktbuf)
+{
+#ifdef BDC
+        struct bdc_header *h;
+#endif
+
+        DHD_TRACE(("%s: Enter\n", __FUNCTION__));
+
+#ifdef BDC
+        /* Pop BDC header used to convey priority for buses that don't */
+
+        if (PKTLEN(dhd->osh, pktbuf) < BDC_HEADER_LEN) {
+                DHD_ERROR(("%s: rx data too short (%d < %d)\n", __FUNCTION__,
+                           PKTLEN(dhd->osh, pktbuf), BDC_HEADER_LEN));
+                return BCME_ERROR;
+        }
+
+        h = (struct bdc_header *)PKTDATA(dhd->osh, pktbuf);
+
+        if ((*ifidx = BDC_GET_IF_IDX(h)) >= DHD_MAX_IFS) {
+                DHD_ERROR(("%s: rx data ifnum out of range (%d)\n",
+                           __FUNCTION__, *ifidx));
+                return BCME_ERROR;
+        }
+
+        if (((h->flags & BDC_FLAG_VER_MASK) >> BDC_FLAG_VER_SHIFT) != BDC_PROTO_VER) {
+                DHD_ERROR(("%s: non-BDC packet received, flags 0x%x\n",
+                           dhd_ifname(dhd, *ifidx), h->flags));
+                return BCME_ERROR;
+        }
+
+        if (h->flags & BDC_FLAG_SUM_GOOD) {
+                DHD_INFO(("%s: BDC packet received with good rx-csum, flags 0x%x\n",
+                          dhd_ifname(dhd, *ifidx), h->flags));
+                PKTSETSUMGOOD(pktbuf, TRUE);
+        }
+
+        PKTSETPRIO(pktbuf, (h->priority & BDC_PRIORITY_MASK));
+
+        PKTPULL(dhd->osh, pktbuf, BDC_HEADER_LEN);
+#endif /* BDC */
+
+        return 0;
+}
+
+int
+dhd_prot_attach(dhd_pub_t *dhd)
+{
+        dhd_prot_t *cdc;
+
+#ifndef DHD_USE_STATIC_BUF
+        if (!(cdc = (dhd_prot_t *)MALLOC(dhd->osh, sizeof(dhd_prot_t)))) {
+                DHD_ERROR(("%s: kmalloc failed\n", __FUNCTION__));
+                goto fail;
+        }
+#else
+        if (!(cdc = (dhd_prot_t *)dhd_os_prealloc(DHD_PREALLOC_PROT, sizeof(dhd_prot_t)))) {
+                DHD_ERROR(("%s: kmalloc failed\n", __FUNCTION__));
+                goto fail;
+        }
+#endif /* DHD_USE_STATIC_BUF */
+        memset(cdc, 0, sizeof(dhd_prot_t));
+
+        /* ensure that the msg buf directly follows the cdc msg struct */
+        if ((uintptr)(&cdc->msg + 1) != (uintptr)cdc->buf) {
+                DHD_ERROR(("dhd_prot_t is not correctly defined\n"));
+                goto fail;
+        }
+
+        dhd->prot = cdc;
+#ifdef BDC
+        dhd->hdrlen += BDC_HEADER_LEN;
+#endif
+        dhd->maxctl = WLC_IOCTL_MAXLEN + sizeof(cdc_ioctl_t) + ROUND_UP_MARGIN;
+        return 0;
+
+fail:
+#ifndef DHD_USE_STATIC_BUF
+        if (cdc != NULL)
+                MFREE(dhd->osh, cdc, sizeof(dhd_prot_t));
+#endif
+        return BCME_NOMEM;
+}
+
+/* ~NOTE~ What if another thread is waiting on the semaphore?  Holding it? */
+void
+dhd_prot_detach(dhd_pub_t *dhd)
+{
+#ifndef DHD_USE_STATIC_BUF
+        MFREE(dhd->osh, dhd->prot, sizeof(dhd_prot_t));
+#endif
+        dhd->prot = NULL;
+}
+
+void
+dhd_prot_dstats(dhd_pub_t *dhd)
+{
+        /* No stats from dongle added yet, copy bus stats */
+        dhd->dstats.tx_packets = dhd->tx_packets;
+        dhd->dstats.tx_errors = dhd->tx_errors;
+        dhd->dstats.rx_packets = dhd->rx_packets;
+        dhd->dstats.rx_errors = dhd->rx_errors;
+        dhd->dstats.rx_dropped = dhd->rx_dropped;
+        dhd->dstats.multicast = dhd->rx_multicast;
+        return;
+}
+
+int
+dhd_prot_init(dhd_pub_t *dhd)
+{
+        int ret = 0;
+        char buf[128];
+
+        DHD_TRACE(("%s: Enter\n", __FUNCTION__));
+
+        dhd_os_proto_block(dhd);
+
+        /* Get the device MAC address */
+        strcpy(buf, "cur_etheraddr");
+        ret = dhdcdc_query_ioctl(dhd, 0, WLC_GET_VAR, buf, sizeof(buf));
+        if (ret < 0) {
+                dhd_os_proto_unblock(dhd);
+                return ret;
+        }
+        memcpy(dhd->mac.octet, buf, ETHER_ADDR_LEN);
+
+        dhd_os_proto_unblock(dhd);
+
+#ifdef EMBEDDED_PLATFORM
+        ret = dhd_preinit_ioctls(dhd);
+#endif /* EMBEDDED_PLATFORM */
+
+        /* Always assumes wl for now */
+        dhd->iswl = TRUE;
+
+        return ret;
+}
+
+void
+dhd_prot_stop(dhd_pub_t *dhd)
+{
+        /* Nothing to do for CDC */
+}