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/*
* Copyright (c) 2010 Broadcom Corporation
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _BRCMF_BUS_H_
#define _BRCMF_BUS_H_
/* The level of bus communication with the dongle */
enum brcmf_bus_state {
BRCMF_BUS_DOWN, /* Not ready for frame transfers */
BRCMF_BUS_LOAD, /* Download access only (CPU reset) */
BRCMF_BUS_DATA /* Ready for frame transfers */
};
struct brcmf_bus_dcmd {
char *name;
char *param;
int param_len;
struct list_head list;
};
/**
* struct brcmf_bus_ops - bus callback operations.
*
* @init: prepare for communication with dongle.
* @stop: clear pending frames, disable data flow.
* @txdata: send a data frame to the dongle. When the data
* has been transferred, the common driver must be
* notified using brcmf_txcomplete(). The common
* driver calls this function with interrupts
* disabled.
* @txctl: transmit a control request message to dongle.
* @rxctl: receive a control response message from dongle.
* @gettxq: obtain a reference of bus transmit queue (optional).
*
* This structure provides an abstract interface towards the
* bus specific driver. For control messages to common driver
* will assure there is only one active transaction. Unless
* indicated otherwise these callbacks are mandatory.
*/
struct brcmf_bus_ops {
int (*init)(struct device *dev);
void (*stop)(struct device *dev);
int (*txdata)(struct device *dev, struct sk_buff *skb);
int (*txctl)(struct device *dev, unsigned char *msg, uint len);
int (*rxctl)(struct device *dev, unsigned char *msg, uint len);
struct pktq * (*gettxq)(struct device *dev);
};
/**
* struct brcmf_bus - interface structure between common and bus layer
*
* @bus_priv: pointer to private bus device.
* @dev: device pointer of bus device.
* @drvr: public driver information.
* @state: operational state of the bus interface.
* @maxctl: maximum size for rxctl request message.
* @tx_realloc: number of tx packets realloced for headroom.
* @dstats: dongle-based statistical data.
* @dcmd_list: bus/device specific dongle initialization commands.
* @chip: device identifier of the dongle chip.
* @chiprev: revision of the dongle chip.
*/
struct brcmf_bus {
union {
struct brcmf_sdio_dev *sdio;
struct brcmf_usbdev *usb;
} bus_priv;
struct device *dev;
struct brcmf_pub *drvr;
enum brcmf_bus_state state;
uint maxctl;
unsigned long tx_realloc;
u32 chip;
u32 chiprev;
struct list_head dcmd_list;
struct brcmf_bus_ops *ops;
};
/*
* callback wrappers
*/
static inline int brcmf_bus_init(struct brcmf_bus *bus)
{
return bus->ops->init(bus->dev);
}
static inline void brcmf_bus_stop(struct brcmf_bus *bus)
{
bus->ops->stop(bus->dev);
}
static inline int brcmf_bus_txdata(struct brcmf_bus *bus, struct sk_buff *skb)
{
return bus->ops->txdata(bus->dev, skb);
}
static inline
int brcmf_bus_txctl(struct brcmf_bus *bus, unsigned char *msg, uint len)
{
return bus->ops->txctl(bus->dev, msg, len);
}
static inline
int brcmf_bus_rxctl(struct brcmf_bus *bus, unsigned char *msg, uint len)
{
return bus->ops->rxctl(bus->dev, msg, len);
}
static inline
struct pktq *brcmf_bus_gettxq(struct brcmf_bus *bus)
{
if (!bus->ops->gettxq)
return ERR_PTR(-ENOENT);
return bus->ops->gettxq(bus->dev);
}
/*
* interface functions from common layer
*/
extern bool brcmf_c_prec_enq(struct device *dev, struct pktq *q,
struct sk_buff *pkt, int prec);
/* Receive frame for delivery to OS. Callee disposes of rxp. */
extern void brcmf_rx_frames(struct device *dev, struct sk_buff_head *rxlist);
/* Indication from bus module regarding presence/insertion of dongle. */
extern int brcmf_attach(uint bus_hdrlen, struct device *dev);
/* Indication from bus module regarding removal/absence of dongle */
extern void brcmf_detach(struct device *dev);
/* Indication from bus module that dongle should be reset */
extern void brcmf_dev_reset(struct device *dev);
/* Indication from bus module to change flow-control state */
extern void brcmf_txflowblock(struct device *dev, bool state);
/* Notify the bus has transferred the tx packet to firmware */
extern void brcmf_txcomplete(struct device *dev, struct sk_buff *txp,
bool success);
extern int brcmf_bus_start(struct device *dev);
#ifdef CONFIG_BRCMFMAC_SDIO
extern void brcmf_sdio_exit(void);
extern void brcmf_sdio_init(void);
#endif
#ifdef CONFIG_BRCMFMAC_USB
extern void brcmf_usb_exit(void);
extern void brcmf_usb_init(void);
#endif
#endif /* _BRCMF_BUS_H_ */
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