drivers/net/wireless/brcm80211/brcmfmac/dhd_bus.h

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   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 ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef _BRCMF_BUS_H_
  18 #define _BRCMF_BUS_H_
  19
  20 #include "dhd_dbg.h"
  21
  22 /* The level of bus communication with the dongle */
  23 enum brcmf_bus_state {
  24         BRCMF_BUS_UNKNOWN,      /* Not determined yet */
  25         BRCMF_BUS_NOMEDIUM,     /* No medium access to dongle */
  26         BRCMF_BUS_DOWN,         /* Not ready for frame transfers */
  27         BRCMF_BUS_LOAD,         /* Download access only (CPU reset) */
  28         BRCMF_BUS_DATA          /* Ready for frame transfers */
  29 };
  30
  31 /* The level of bus communication with the dongle */
  32 enum brcmf_bus_protocol_type {
  33         BRCMF_PROTO_BCDC,
  34         BRCMF_PROTO_MSGBUF
  35 };
  36
  37 struct brcmf_bus_dcmd {
  38         char *name;
  39         char *param;
  40         int param_len;
  41         struct list_head list;
  42 };
  43
  44 /**
  45  * struct brcmf_bus_ops - bus callback operations.
  46  *
  47  * @preinit: execute bus/device specific dongle init commands (optional).
  48  * @init: prepare for communication with dongle.
  49  * @stop: clear pending frames, disable data flow.
  50  * @txdata: send a data frame to the dongle. When the data
  51  *      has been transferred, the common driver must be
  52  *      notified using brcmf_txcomplete(). The common
  53  *      driver calls this function with interrupts
  54  *      disabled.
  55  * @txctl: transmit a control request message to dongle.
  56  * @rxctl: receive a control response message from dongle.
  57  * @gettxq: obtain a reference of bus transmit queue (optional).
  58  *
  59  * This structure provides an abstract interface towards the
  60  * bus specific driver. For control messages to common driver
  61  * will assure there is only one active transaction. Unless
  62  * indicated otherwise these callbacks are mandatory.
  63  */
  64 struct brcmf_bus_ops {
  65         int (*preinit)(struct device *dev);
  66         int (*init)(struct device *dev);
  67         void (*stop)(struct device *dev);
  68         int (*txdata)(struct device *dev, struct sk_buff *skb);
  69         int (*txctl)(struct device *dev, unsigned char *msg, uint len);
  70         int (*rxctl)(struct device *dev, unsigned char *msg, uint len);
  71         struct pktq * (*gettxq)(struct device *dev);
  72 };
  73
  74 /**
  75  * struct brcmf_bus - interface structure between common and bus layer
  76  *
  77  * @bus_priv: pointer to private bus device.
  78  * @proto_type: protocol type, bcdc or msgbuf
  79  * @dev: device pointer of bus device.
  80  * @drvr: public driver information.
  81  * @state: operational state of the bus interface.
  82  * @maxctl: maximum size for rxctl request message.
  83  * @tx_realloc: number of tx packets realloced for headroom.
  84  * @dstats: dongle-based statistical data.
  85  * @dcmd_list: bus/device specific dongle initialization commands.
  86  * @chip: device identifier of the dongle chip.
  87  * @chiprev: revision of the dongle chip.
  88  */
  89 struct brcmf_bus {
  90         union {
  91                 struct brcmf_sdio_dev *sdio;
  92                 struct brcmf_usbdev *usb;
  93         } bus_priv;
  94         enum brcmf_bus_protocol_type proto_type;
  95         struct device *dev;
  96         struct brcmf_pub *drvr;
  97         enum brcmf_bus_state state;
  98         uint maxctl;
  99         unsigned long tx_realloc;
 100         u32 chip;
 101         u32 chiprev;
 102
 103         struct brcmf_bus_ops *ops;
 104 };
 105
 106 /*
 107  * callback wrappers
 108  */
 109 static inline int brcmf_bus_preinit(struct brcmf_bus *bus)
 110 {
 111         if (!bus->ops->preinit)
 112                 return 0;
 113         return bus->ops->preinit(bus->dev);
 114 }
 115
 116 static inline int brcmf_bus_init(struct brcmf_bus *bus)
 117 {
 118         return bus->ops->init(bus->dev);
 119 }
 120
 121 static inline void brcmf_bus_stop(struct brcmf_bus *bus)
 122 {
 123         bus->ops->stop(bus->dev);
 124 }
 125
 126 static inline int brcmf_bus_txdata(struct brcmf_bus *bus, struct sk_buff *skb)
 127 {
 128         return bus->ops->txdata(bus->dev, skb);
 129 }
 130
 131 static inline
 132 int brcmf_bus_txctl(struct brcmf_bus *bus, unsigned char *msg, uint len)
 133 {
 134         return bus->ops->txctl(bus->dev, msg, len);
 135 }
 136
 137 static inline
 138 int brcmf_bus_rxctl(struct brcmf_bus *bus, unsigned char *msg, uint len)
 139 {
 140         return bus->ops->rxctl(bus->dev, msg, len);
 141 }
 142
 143 static inline
 144 struct pktq *brcmf_bus_gettxq(struct brcmf_bus *bus)
 145 {
 146         if (!bus->ops->gettxq)
 147                 return ERR_PTR(-ENOENT);
 148
 149         return bus->ops->gettxq(bus->dev);
 150 }
 151
 152 static inline bool brcmf_bus_ready(struct brcmf_bus *bus)
 153 {
 154         return bus->state == BRCMF_BUS_LOAD || bus->state == BRCMF_BUS_DATA;
 155 }
 156
 157 static inline void brcmf_bus_change_state(struct brcmf_bus *bus,
 158                                           enum brcmf_bus_state new_state)
 159 {
 160         /* NOMEDIUM is permanent */
 161         if (bus->state == BRCMF_BUS_NOMEDIUM)
 162                 return;
 163
 164         brcmf_dbg(TRACE, "%d -> %d\n", bus->state, new_state);
 165         bus->state = new_state;
 166 }
 167
 168 /*
 169  * interface functions from common layer
 170  */
 171
 172 bool brcmf_c_prec_enq(struct device *dev, struct pktq *q, struct sk_buff *pkt,
 173                       int prec);
 174
 175 /* Receive frame for delivery to OS.  Callee disposes of rxp. */
 176 void brcmf_rx_frame(struct device *dev, struct sk_buff *rxp);
 177
 178 /* Indication from bus module regarding presence/insertion of dongle. */
 179 int brcmf_attach(struct device *dev);
 180 /* Indication from bus module regarding removal/absence of dongle */
 181 void brcmf_detach(struct device *dev);
 182 /* Indication from bus module that dongle should be reset */
 183 void brcmf_dev_reset(struct device *dev);
 184 /* Indication from bus module to change flow-control state */
 185 void brcmf_txflowblock(struct device *dev, bool state);
 186
 187 /* Notify the bus has transferred the tx packet to firmware */
 188 void brcmf_txcomplete(struct device *dev, struct sk_buff *txp, bool success);
 189
 190 int brcmf_bus_start(struct device *dev);
 191 s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data,
 192                                 u32 len);
 193 void brcmf_bus_add_txhdrlen(struct device *dev, uint len);
 194
 195 #ifdef CONFIG_BRCMFMAC_SDIO
 196 void brcmf_sdio_exit(void);
 197 void brcmf_sdio_init(void);
 198 void brcmf_sdio_register(void);
 199 #endif
 200 #ifdef CONFIG_BRCMFMAC_USB
 201 void brcmf_usb_exit(void);
 202 void brcmf_usb_register(void);
 203 #endif
 204
 205 #endif                          /* _BRCMF_BUS_H_ */