drivers/net/wireless/ath/ath9k/htc_hst.h

   1 /*
   2  * Copyright (c) 2010-2011 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);
  37         void (*stop) (void *hif_handle);
  38         void (*sta_drain) (void *hif_handle, u8 idx);
  39         int (*send) (void *hif_handle, u8 pipe, struct sk_buff *buf);
  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_ep_callbacks {
  81         void *priv;
  82         void (*tx) (void *, struct sk_buff *, enum htc_endpoint_id, bool txok);
  83         void (*rx) (void *, struct sk_buff *, enum htc_endpoint_id);
  84 };
  85
  86 struct htc_endpoint {
  87         u16 service_id;
  88
  89         struct htc_ep_callbacks ep_callbacks;
  90         u32 max_txqdepth;
  91         int max_msglen;
  92
  93         u8 ul_pipeid;
  94         u8 dl_pipeid;
  95 };
  96
  97 #define HTC_MAX_CONTROL_MESSAGE_LENGTH 255
  98 #define HTC_CONTROL_BUFFER_SIZE \
  99         (HTC_MAX_CONTROL_MESSAGE_LENGTH + sizeof(struct htc_frame_hdr))
 100
 101 #define HTC_OP_START_WAIT           BIT(0)
 102 #define HTC_OP_CONFIG_PIPE_CREDITS  BIT(1)
 103
 104 struct htc_target {
 105         void *hif_dev;
 106         struct ath9k_htc_priv *drv_priv;
 107         struct device *dev;
 108         struct ath9k_htc_hif *hif;
 109         struct htc_endpoint endpoint[ENDPOINT_MAX];
 110         struct completion target_wait;
 111         struct completion cmd_wait;
 112         struct list_head list;
 113         enum htc_endpoint_id conn_rsp_epid;
 114         u16 credits;
 115         u16 credit_size;
 116         u8 htc_flags;
 117         atomic_t tgt_ready;
 118 };
 119
 120 enum htc_msg_id {
 121         HTC_MSG_READY_ID = 1,
 122         HTC_MSG_CONNECT_SERVICE_ID,
 123         HTC_MSG_CONNECT_SERVICE_RESPONSE_ID,
 124         HTC_MSG_SETUP_COMPLETE_ID,
 125         HTC_MSG_CONFIG_PIPE_ID,
 126         HTC_MSG_CONFIG_PIPE_RESPONSE_ID,
 127 };
 128
 129 struct htc_service_connreq {
 130         u16 service_id;
 131         u16 con_flags;
 132         u32 max_send_qdepth;
 133         struct htc_ep_callbacks ep_callbacks;
 134 };
 135
 136 /* Current service IDs */
 137
 138 enum htc_service_group_ids{
 139         RSVD_SERVICE_GROUP = 0,
 140         WMI_SERVICE_GROUP = 1,
 141
 142         HTC_SERVICE_GROUP_LAST = 255
 143 };
 144
 145 #define MAKE_SERVICE_ID(group, index)           \
 146         (int)(((int)group << 8) | (int)(index))
 147
 148 /* NOTE: service ID of 0x0000 is reserved and should never be used */
 149 #define HTC_CTRL_RSVD_SVC MAKE_SERVICE_ID(RSVD_SERVICE_GROUP, 1)
 150 #define HTC_LOOPBACK_RSVD_SVC MAKE_SERVICE_ID(RSVD_SERVICE_GROUP, 2)
 151
 152 #define WMI_CONTROL_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 0)
 153 #define WMI_BEACON_SVC    MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 1)
 154 #define WMI_CAB_SVC       MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 2)
 155 #define WMI_UAPSD_SVC     MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 3)
 156 #define WMI_MGMT_SVC      MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 4)
 157 #define WMI_DATA_VO_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 5)
 158 #define WMI_DATA_VI_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 6)
 159 #define WMI_DATA_BE_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 7)
 160 #define WMI_DATA_BK_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 8)
 161
 162 struct htc_conn_svc_msg {
 163         __be16 msg_id;
 164         __be16 service_id;
 165         __be16 con_flags;
 166         u8 dl_pipeid;
 167         u8 ul_pipeid;
 168         u8 svc_meta_len;
 169         u8 pad;
 170 } __packed;
 171
 172 /* connect response status codes */
 173 #define HTC_SERVICE_SUCCESS      0
 174 #define HTC_SERVICE_NOT_FOUND    1
 175 #define HTC_SERVICE_FAILED       2
 176 #define HTC_SERVICE_NO_RESOURCES 3
 177 #define HTC_SERVICE_NO_MORE_EP   4
 178
 179 struct htc_conn_svc_rspmsg {
 180         __be16 msg_id;
 181         __be16 service_id;
 182         u8 status;
 183         u8 endpoint_id;
 184         __be16 max_msg_len;
 185         u8 svc_meta_len;
 186         u8 pad;
 187 } __packed;
 188
 189 struct htc_comp_msg {
 190         __be16 msg_id;
 191 } __packed;
 192
 193 int htc_init(struct htc_target *target);
 194 int htc_connect_service(struct htc_target *target,
 195                           struct htc_service_connreq *service_connreq,
 196                           enum htc_endpoint_id *conn_rsp_eid);
 197 int htc_send(struct htc_target *target, struct sk_buff *skb);
 198 int htc_send_epid(struct htc_target *target, struct sk_buff *skb,
 199                   enum htc_endpoint_id epid);
 200 void htc_stop(struct htc_target *target);
 201 void htc_start(struct htc_target *target);
 202 void htc_sta_drain(struct htc_target *target, u8 idx);
 203
 204 void ath9k_htc_rx_msg(struct htc_target *htc_handle,
 205                       struct sk_buff *skb, u32 len, u8 pipe_id);
 206 void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle,
 207                                struct sk_buff *skb, bool txok);
 208
 209 struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
 210                                       struct ath9k_htc_hif *hif,
 211                                       struct device *dev);
 212 void ath9k_htc_hw_free(struct htc_target *htc);
 213 int ath9k_htc_hw_init(struct htc_target *target,
 214                       struct device *dev, u16 devid, char *product,
 215                       u32 drv_info);
 216 void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug);
 217
 218 #endif /* HTC_HST_H */