Staging: add CSR wifi module

This consists of two modules, the driver, and a "helper" module that is
just a wrapper around common kernel functions.  The wrapper module will
be removed soon, but for now it's needed.

These files were based on the csr-linux-wifi-5.0.3-oss.tar.gz package
provided by CSR and Blue Giga, and is covered under the license
specified in the LICENSE.txt file (basically dual BSD and GPLv2).  The
files were flattened out of the deep directory mess they were originally
in, and a few EXPORT_SYMBOL_GPL() were added in order for everything to
link properly with the helper module setup.

Cc: Mikko Virkkilä <mikko.virkkila@bluegiga.com>
Cc: Lauri Hintsala <Lauri.Hintsala@bluegiga.com>
Cc: Riku Mettälä <riku.mettala@bluegiga.com>
Cc: Veli-Pekka Peltola <veli-pekka.peltola@bluegiga.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 129 insertions, 0 deletions

diff --git a/drivers/staging/csr/unifi_clients.h b/drivers/staging/csr/unifi_clients.h
new file mode 100644
index 0000000..206b8cf
--- /dev/null
+++ b/drivers/staging/csr/unifi_clients.h
@@ -0,0 +1,129 @@
+/*
+ *****************************************************************************
+ *
+ * FILE : unifi_clients.h
+ *
+ * PURPOSE : Private header file for unifi clients.
+ *
+ *           UDI = UniFi Debug Interface
+ *
+ * Copyright (C) 2005-2008 by Cambridge Silicon Radio Ltd.
+ *
+ * Refer to LICENSE.txt included with this source code for details on
+ * the license terms.
+ *
+ *****************************************************************************
+ */
+#ifndef __LINUX_UNIFI_CLIENTS_H__
+#define __LINUX_UNIFI_CLIENTS_H__ 1
+
+#include <linux/kernel.h>
+
+#define MAX_UDI_CLIENTS 8
+
+/* The start of the range of process ids allocated for ul clients */
+#define UDI_SENDER_ID_BASE      0xC000
+#define UDI_SENDER_ID_SHIFT     8
+
+
+/* Structure to hold a UDI logged signal */
+typedef struct {
+
+    /* List link structure */
+    struct list_head q;
+
+    /* The message that will be passed to the user app */
+    udi_msg_t msg;
+
+    /* Signal body and data follow */
+
+} udi_log_t;
+
+
+
+typedef struct ul_client ul_client_t;
+
+typedef void (*udi_event_t)(ul_client_t *client,
+                            const u8 *sigdata, int signal_len,
+                            const bulk_data_param_t *bulkdata,
+                            int dir);
+
+void logging_handler(void *ospriv,
+                     CsrUint8 *sigdata, CsrUint32 signal_len,
+                     const bulk_data_param_t *bulkdata,
+                     enum udi_log_direction direction);
+
+
+/*
+ * Structure describing a bulk data slot.
+ * The length field is used to indicate empty/occupied state.
+ */
+typedef struct _bulk_data
+{
+    unsigned char ptr[2000];
+    unsigned int length;
+} bulk_data_t;
+
+
+struct ul_client {
+    /* Index of this client in the ul_clients array. */
+    int client_id;
+
+    /* Index of UniFi device to which this client is attached. */
+    int instance;
+
+    /* Flag to say whether this client has been enabled. */
+    int udi_enabled;
+
+    /* Value to use in signal->SenderProcessId */
+    int sender_id;
+
+    /* Configuration flags, e.g blocking, logging, etc. */
+    unsigned int configuration;
+
+    udi_event_t event_hook;
+
+    /* A list to hold signals received from UniFi for reading by read() */
+    struct list_head udi_log;
+
+    /* Semaphore to protect the udi_log list */
+    struct semaphore udi_sem;
+
+    /*
+     * Linux waitqueue to support blocking read and poll.
+     * Logging clients should wait on udi_log. while
+     * blocking clients should wait on wake_up_wq.
+     */
+    wait_queue_head_t udi_wq;
+    CSR_SIGNAL* reply_signal;
+    bulk_data_t* reply_bulkdata[UNIFI_MAX_DATA_REFERENCES];
+
+    CsrUint16 signal_filter[SIG_FILTER_SIZE];
+
+
+    /* ------------------------------------------------------------------- */
+    /* Code below here is used by the sme_native configuration only */
+
+    /* Flag to wake up blocking clients waiting on udi_wq. */
+    int wake_up_wq_id;
+
+    /*
+     * A 0x00 - 0x0F mask to apply in signal->SenderProcessId.
+     * Every time we do a blocking mlme request we increase this value.
+     * The mlme_wait_for_reply() will wait for this sequence number.
+     * Only the MLME blocking functions update this field.
+     */
+    unsigned char seq_no;
+
+    /*
+     * A 0x00 - 0x0F counter, containing the sequence number of
+     * the signal that this client has last received.
+     * Only the MLME blocking functions update this field.
+     */
+    unsigned char wake_seq_no;
+
+    unifiio_snap_filter_t snap_filter;
+}; /* struct ul_client */
+
+
+#endif /* __LINUX_UNIFI_CLIENTS_H__ */