release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/net/wireless/ath/ath9k/htc_hst.h

   1 /*
   2  * Copyright (c) 2010 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef HTC_HST_H
  18 #define HTC_HST_H
  19
  20 struct ath9k_htc_priv;
  21 struct htc_target;
  22 struct ath9k_htc_tx_ctl;
  23
  24 enum ath9k_hif_transports {
  25         ATH9K_HIF_USB,
  26 };
  27
  28 struct ath9k_htc_hif {
  29         struct list_head list;
  30         const enum ath9k_hif_transports transport;
  31         const char *name;
  32
  33         u8 control_dl_pipe;
  34         u8 control_ul_pipe;
  35
  36         void (*start) (void *hif_handle, u8 pipe);
  37         void (*stop) (void *hif_handle, u8 pipe);
  38         int (*send) (void *hif_handle, u8 pipe, struct sk_buff *buf,
  39                      struct ath9k_htc_tx_ctl *tx_ctl);
  40 };
  41
  42 enum htc_endpoint_id {
  43         ENDPOINT_UNUSED = -1,
  44         ENDPOINT0 = 0,
  45         ENDPOINT1 = 1,
  46         ENDPOINT2 = 2,
  47         ENDPOINT3 = 3,
  48         ENDPOINT4 = 4,
  49         ENDPOINT5 = 5,
  50         ENDPOINT6 = 6,
  51         ENDPOINT7 = 7,
  52         ENDPOINT8 = 8,
  53         ENDPOINT_MAX = 22
  54 };
  55
  56 /* Htc frame hdr flags */
  57 #define HTC_FLAGS_RECV_TRAILER (1 << 1)
  58
  59 struct htc_frame_hdr {
  60         u8 endpoint_id;
  61         u8 flags;
  62         __be16 payload_len;
  63         u8 control[4];
  64 } __packed;
  65
  66 struct htc_ready_msg {
  67         __be16 message_id;
  68         __be16 credits;
  69         __be16 credit_size;
  70         u8 max_endpoints;
  71         u8 pad;
  72 } __packed;
  73
  74 struct htc_config_pipe_msg {
  75         __be16 message_id;
  76         u8 pipe_id;
  77         u8 credits;
  78 } __packed;
  79
  80 struct htc_packet {
  81         void *pktcontext;
  82         u8 *buf;
  83         u8 *buf_payload;
  84         u32 buflen;
  85         u32 payload_len;
  86
  87         int endpoint;
  88         int status;
  89
  90         void *context;
  91         u32 reserved;
  92 };
  93
  94 struct htc_ep_callbacks {
  95         void *priv;
  96         void (*tx) (void *, struct sk_buff *, enum htc_endpoint_id, bool txok);
  97         void (*rx) (void *, struct sk_buff *, enum htc_endpoint_id);
  98 };
  99
 100 #define HTC_TX_QUEUE_SIZE 256
 101
 102 struct htc_txq {
 103         struct sk_buff *buf[HTC_TX_QUEUE_SIZE];
 104         u32 txqdepth;
 105         u16 txbuf_cnt;
 106         u16 txq_head;
 107         u16 txq_tail;
 108 };
 109
 110 struct htc_endpoint {
 111         u16 service_id;
 112
 113         struct htc_ep_callbacks ep_callbacks;
 114         struct htc_txq htc_txq;
 115         u32 max_txqdepth;
 116         int max_msglen;
 117
 118         u8 ul_pipeid;
 119         u8 dl_pipeid;
 120 };
 121
 122 #define HTC_MAX_CONTROL_MESSAGE_LENGTH 255
 123 #define HTC_CONTROL_BUFFER_SIZE \
 124         (HTC_MAX_CONTROL_MESSAGE_LENGTH + sizeof(struct htc_frame_hdr))
 125
 126 struct htc_control_buf {
 127         struct htc_packet htc_pkt;
 128         u8 buf[HTC_CONTROL_BUFFER_SIZE];
 129 };
 130
 131 #define HTC_OP_START_WAIT           BIT(0)
 132 #define HTC_OP_CONFIG_PIPE_CREDITS  BIT(1)
 133
 134 struct htc_target {
 135         void *hif_dev;
 136         struct ath9k_htc_priv *drv_priv;
 137         struct device *dev;
 138         struct ath9k_htc_hif *hif;
 139         struct htc_endpoint endpoint[ENDPOINT_MAX];
 140         struct completion target_wait;
 141         struct completion cmd_wait;
 142         struct list_head list;
 143         enum htc_endpoint_id conn_rsp_epid;
 144         u16 credits;
 145         u16 credit_size;
 146         u8 htc_flags;
 147         atomic_t tgt_ready;
 148 };
 149
 150 enum htc_msg_id {
 151         HTC_MSG_READY_ID = 1,
 152         HTC_MSG_CONNECT_SERVICE_ID,
 153         HTC_MSG_CONNECT_SERVICE_RESPONSE_ID,
 154         HTC_MSG_SETUP_COMPLETE_ID,
 155         HTC_MSG_CONFIG_PIPE_ID,
 156         HTC_MSG_CONFIG_PIPE_RESPONSE_ID,
 157 };
 158
 159 struct htc_service_connreq {
 160         u16 service_id;
 161         u16 con_flags;
 162         u32 max_send_qdepth;
 163         struct htc_ep_callbacks ep_callbacks;
 164 };
 165
 166 /* Current service IDs */
 167
 168 enum htc_service_group_ids{
 169         RSVD_SERVICE_GROUP = 0,
 170         WMI_SERVICE_GROUP = 1,
 171
 172         HTC_SERVICE_GROUP_LAST = 255
 173 };
 174
 175 #define MAKE_SERVICE_ID(group, index)           \
 176         (int)(((int)group << 8) | (int)(index))
 177
 178 /* NOTE: service ID of 0x0000 is reserved and should never be used */
 179 #define HTC_CTRL_RSVD_SVC MAKE_SERVICE_ID(RSVD_SERVICE_GROUP, 1)
 180 #define HTC_LOOPBACK_RSVD_SVC MAKE_SERVICE_ID(RSVD_SERVICE_GROUP, 2)
 181
 182 #define WMI_CONTROL_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 0)
 183 #define WMI_BEACON_SVC    MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 1)
 184 #define WMI_CAB_SVC       MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 2)
 185 #define WMI_UAPSD_SVC     MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 3)
 186 #define WMI_MGMT_SVC      MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 4)
 187 #define WMI_DATA_VO_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 5)
 188 #define WMI_DATA_VI_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 6)
 189 #define WMI_DATA_BE_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 7)
 190 #define WMI_DATA_BK_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 8)
 191
 192 struct htc_conn_svc_msg {
 193         __be16 msg_id;
 194         __be16 service_id;
 195         __be16 con_flags;
 196         u8 dl_pipeid;
 197         u8 ul_pipeid;
 198         u8 svc_meta_len;
 199         u8 pad;
 200 } __packed;
 201
 202 /* connect response status codes */
 203 #define HTC_SERVICE_SUCCESS      0
 204 #define HTC_SERVICE_NOT_FOUND    1
 205 #define HTC_SERVICE_FAILED       2
 206 #define HTC_SERVICE_NO_RESOURCES 3
 207 #define HTC_SERVICE_NO_MORE_EP   4
 208
 209 struct htc_conn_svc_rspmsg {
 210         __be16 msg_id;
 211         __be16 service_id;
 212         u8 status;
 213         u8 endpoint_id;
 214         __be16 max_msg_len;
 215         u8 svc_meta_len;
 216         u8 pad;
 217 } __packed;
 218
 219 struct htc_comp_msg {
 220         __be16 msg_id;
 221 } __packed;
 222
 223 int htc_init(struct htc_target *target);
 224 int htc_connect_service(struct htc_target *target,
 225                           struct htc_service_connreq *service_connreq,
 226                           enum htc_endpoint_id *conn_rsp_eid);
 227 int htc_send(struct htc_target *target, struct sk_buff *skb,
 228              enum htc_endpoint_id eid, struct ath9k_htc_tx_ctl *tx_ctl);
 229 void htc_stop(struct htc_target *target);
 230 void htc_start(struct htc_target *target);
 231
 232 void ath9k_htc_rx_msg(struct htc_target *htc_handle,
 233                       struct sk_buff *skb, u32 len, u8 pipe_id);
 234 void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle,
 235                                struct sk_buff *skb, bool txok);
 236
 237 struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
 238                                       struct ath9k_htc_hif *hif,
 239                                       struct device *dev);
 240 void ath9k_htc_hw_free(struct htc_target *htc);
 241 int ath9k_htc_hw_init(struct htc_target *target,
 242                       struct device *dev, u16 devid);
 243 void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug);
 244
 245 #endif /* HTC_HST_H */