drivers/uwb/i1480/i1480-wlp.h

   1 /*
   2  * Intel 1480 Wireless UWB Link
   3  * WLP specific definitions
   4  *
   5  *
   6  * Copyright (C) 2005-2006 Intel Corporation
   7  * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License version
  11  * 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  * 02110-1301, USA.
  22  *
  23  *
  24  * FIXME: docs
  25  */
  26
  27 #ifndef __i1480_wlp_h__
  28 #define __i1480_wlp_h__
  29
  30 #include <linux/spinlock.h>
  31 #include <linux/list.h>
  32 #include <linux/uwb.h>
  33 #include <linux/if_ether.h>
  34 #include <asm/byteorder.h>
  35
  36 /* New simplified header format? */
  37 #undef WLP_HDR_FMT_2            /* FIXME: rename */
  38
  39 /**
  40  * Values of the Delivery ID & Type field when PCA or DRP
  41  *
  42  * The Delivery ID & Type field in the WLP TX header indicates whether
  43  * the frame is PCA or DRP. This is done based on the high level bit of
  44  * this field.
  45  * We use this constant to test if the traffic is PCA or DRP as follows:
  46  * if (wlp_tx_hdr_delivery_id_type(wlp_tx_hdr) & WLP_DRP)
  47  *      this is DRP traffic
  48  * else
  49  *      this is PCA traffic
  50  */
  51 enum deliver_id_type_bit {
  52         WLP_DRP = 8,
  53 };
  54
  55 /**
  56  * WLP TX header
  57  *
  58  * Indicates UWB/WLP-specific transmission parameters for a network
  59  * packet.
  60  */
  61 struct wlp_tx_hdr {
  62         /* dword 0 */
  63         struct uwb_dev_addr dstaddr;
  64         u8                  key_index;
  65         u8                  mac_params;
  66         /* dword 1 */
  67         u8                  phy_params;
  68 #ifndef WLP_HDR_FMT_2
  69         u8                  reserved;
  70         __le16              oui01;              /* FIXME: not so sure if __le16 or u8[2] */
  71         /* dword 2 */
  72         u8                  oui2;               /*        if all LE, it could be merged */
  73         __le16              prid;
  74 #endif
  75 } __attribute__((packed));
  76
  77 static inline int wlp_tx_hdr_delivery_id_type(const struct wlp_tx_hdr *hdr)
  78 {
  79         return hdr->mac_params & 0x0f;
  80 }
  81
  82 static inline int wlp_tx_hdr_ack_policy(const struct wlp_tx_hdr *hdr)
  83 {
  84         return (hdr->mac_params >> 4) & 0x07;
  85 }
  86
  87 static inline int wlp_tx_hdr_rts_cts(const struct wlp_tx_hdr *hdr)
  88 {
  89         return (hdr->mac_params >> 7) & 0x01;
  90 }
  91
  92 static inline void wlp_tx_hdr_set_delivery_id_type(struct wlp_tx_hdr *hdr, int id)
  93 {
  94         hdr->mac_params = (hdr->mac_params & ~0x0f) | id;
  95 }
  96
  97 static inline void wlp_tx_hdr_set_ack_policy(struct wlp_tx_hdr *hdr,
  98                                              enum uwb_ack_pol policy)
  99 {
 100         hdr->mac_params = (hdr->mac_params & ~0x70) | (policy << 4);
 101 }
 102
 103 static inline void wlp_tx_hdr_set_rts_cts(struct wlp_tx_hdr *hdr, int rts_cts)
 104 {
 105         hdr->mac_params = (hdr->mac_params & ~0x80) | (rts_cts << 7);
 106 }
 107
 108 static inline enum uwb_phy_rate wlp_tx_hdr_phy_rate(const struct wlp_tx_hdr *hdr)
 109 {
 110         return hdr->phy_params & 0x0f;
 111 }
 112
 113 static inline int wlp_tx_hdr_tx_power(const struct wlp_tx_hdr *hdr)
 114 {
 115         return (hdr->phy_params >> 4) & 0x0f;
 116 }
 117
 118 static inline void wlp_tx_hdr_set_phy_rate(struct wlp_tx_hdr *hdr, enum uwb_phy_rate rate)
 119 {
 120         hdr->phy_params = (hdr->phy_params & ~0x0f) | rate;
 121 }
 122
 123 static inline void wlp_tx_hdr_set_tx_power(struct wlp_tx_hdr *hdr, int pwr)
 124 {
 125         hdr->phy_params = (hdr->phy_params & ~0xf0) | (pwr << 4);
 126 }
 127
 128
 129 /**
 130  * WLP RX header
 131  *
 132  * Provides UWB/WLP-specific transmission data for a received
 133  * network packet.
 134  */
 135 struct wlp_rx_hdr {
 136         /* dword 0 */
 137         struct uwb_dev_addr dstaddr;
 138         struct uwb_dev_addr srcaddr;
 139         /* dword 1 */
 140         u8                  LQI;
 141         s8                  RSSI;
 142         u8                  reserved3;
 143 #ifndef WLP_HDR_FMT_2
 144         u8                  oui0;
 145         /* dword 2 */
 146         __le16              oui12;
 147         __le16              prid;
 148 #endif
 149 } __attribute__((packed));
 150
 151
 152 /** User configurable options for WLP */
 153 struct wlp_options {
 154         struct mutex mutex; /* access to user configurable options*/
 155         struct wlp_tx_hdr def_tx_hdr;   /* default tx hdr */
 156         u8 pca_base_priority;
 157         u8 bw_alloc; /*index into bw_allocs[] for PCA/DRP reservations*/
 158 };
 159
 160
 161 static inline
 162 void wlp_options_init(struct wlp_options *options)
 163 {
 164         mutex_init(&options->mutex);
 165         wlp_tx_hdr_set_ack_policy(&options->def_tx_hdr, UWB_ACK_INM);
 166         wlp_tx_hdr_set_rts_cts(&options->def_tx_hdr, 1);
 167         /* FIXME: default to phy caps */
 168         wlp_tx_hdr_set_phy_rate(&options->def_tx_hdr, UWB_PHY_RATE_480);
 169 #ifndef WLP_HDR_FMT_2
 170         options->def_tx_hdr.prid = cpu_to_le16(0x0000);
 171 #endif
 172 }
 173
 174
 175 /* sysfs helpers */
 176
 177 extern ssize_t uwb_pca_base_priority_store(struct wlp_options *,
 178                                            const char *, size_t);
 179 extern ssize_t uwb_pca_base_priority_show(const struct wlp_options *, char *);
 180 extern ssize_t uwb_bw_alloc_store(struct wlp_options *, const char *, size_t);
 181 extern ssize_t uwb_bw_alloc_show(const struct wlp_options *, char *);
 182 extern ssize_t uwb_ack_policy_store(struct wlp_options *,
 183                                     const char *, size_t);
 184 extern ssize_t uwb_ack_policy_show(const struct wlp_options *, char *);
 185 extern ssize_t uwb_rts_cts_store(struct wlp_options *, const char *, size_t);
 186 extern ssize_t uwb_rts_cts_show(const struct wlp_options *, char *);
 187 extern ssize_t uwb_phy_rate_store(struct wlp_options *, const char *, size_t);
 188 extern ssize_t uwb_phy_rate_show(const struct wlp_options *, char *);
 189
 190
 191 /** Simple bandwidth allocation (temporary and too simple) */
 192 struct wlp_bw_allocs {
 193         const char *name;
 194         struct {
 195                 u8 mask, stream;
 196         } tx, rx;
 197 };
 198
 199
 200 #endif /* #ifndef __i1480_wlp_h__ */