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 0000000..4bec0b6
--- /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 */
+}