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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_
#include "dhd_dbg.h"
/* IDs of the 6 default common rings of msgbuf protocol */
#define BRCMF_H2D_MSGRING_CONTROL_SUBMIT 0
#define BRCMF_H2D_MSGRING_RXPOST_SUBMIT 1
#define BRCMF_D2H_MSGRING_CONTROL_COMPLETE 2
#define BRCMF_D2H_MSGRING_TX_COMPLETE 3
#define BRCMF_D2H_MSGRING_RX_COMPLETE 4
#define BRCMF_NROF_H2D_COMMON_MSGRINGS 2
#define BRCMF_NROF_D2H_COMMON_MSGRINGS 3
#define BRCMF_NROF_COMMON_MSGRINGS (BRCMF_NROF_H2D_COMMON_MSGRINGS + \
BRCMF_NROF_D2H_COMMON_MSGRINGS)
/* The level of bus communication with the dongle */
enum brcmf_bus_state {
BRCMF_BUS_UNKNOWN, /* Not determined yet */
BRCMF_BUS_NOMEDIUM, /* No medium access to dongle */
BRCMF_BUS_DOWN, /* Not ready for frame transfers */
BRCMF_BUS_LOAD, /* Download access only (CPU reset) */
BRCMF_BUS_DATA /* Ready for frame transfers */
};
/* The level of bus communication with the dongle */
enum brcmf_bus_protocol_type {
BRCMF_PROTO_BCDC,
BRCMF_PROTO_MSGBUF
};
struct brcmf_bus_dcmd {
char *name;
char *param;
int param_len;
struct list_head list;
};
/**
* struct brcmf_bus_ops - bus callback operations.
*
* @preinit: execute bus/device specific dongle init commands (optional).
* @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 (*preinit)(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_msgbuf - bus ringbuf if in case of msgbuf.
*
* @commonrings: commonrings which are always there.
* @flowrings: commonrings which are dynamically created and destroyed for data.
* @rx_dataoffset: if set then all rx data has this this offset.
* @max_rxbufpost: maximum number of buffers to post for rx.
* @nrof_flowrings: number of flowrings.
*/
struct brcmf_bus_msgbuf {
struct brcmf_commonring *commonrings[BRCMF_NROF_COMMON_MSGRINGS];
struct brcmf_commonring **flowrings;
u32 rx_dataoffset;
u32 max_rxbufpost;
u32 nrof_flowrings;
};
/**
* struct brcmf_bus - interface structure between common and bus layer
*
* @bus_priv: pointer to private bus device.
* @proto_type: protocol type, bcdc or msgbuf
* @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;
struct brcmf_pciedev *pcie;
} bus_priv;
enum brcmf_bus_protocol_type proto_type;
struct device *dev;
struct brcmf_pub *drvr;
enum brcmf_bus_state state;
uint maxctl;
unsigned long tx_realloc;
u32 chip;
u32 chiprev;
bool always_use_fws_queue;
struct brcmf_bus_ops *ops;
struct brcmf_bus_msgbuf *msgbuf;
};
/*
* callback wrappers
*/
static inline int brcmf_bus_preinit(struct brcmf_bus *bus)
{
if (!bus->ops->preinit)
return 0;
return bus->ops->preinit(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);
}
static inline bool brcmf_bus_ready(struct brcmf_bus *bus)
{
return bus->state == BRCMF_BUS_LOAD || bus->state == BRCMF_BUS_DATA;
}
static inline void brcmf_bus_change_state(struct brcmf_bus *bus,
enum brcmf_bus_state new_state)
{
/* NOMEDIUM is permanent */
if (bus->state == BRCMF_BUS_NOMEDIUM)
return;
brcmf_dbg(TRACE, "%d -> %d\n", bus->state, new_state);
bus->state = new_state;
}
/*
* interface functions from common layer
*/
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. */
void brcmf_rx_frame(struct device *dev, struct sk_buff *rxp);
/* Indication from bus module regarding presence/insertion of dongle. */
int brcmf_attach(struct device *dev);
/* Indication from bus module regarding removal/absence of dongle */
void brcmf_detach(struct device *dev);
/* Indication from bus module that dongle should be reset */
void brcmf_dev_reset(struct device *dev);
/* Indication from bus module to change flow-control state */
void brcmf_txflowblock(struct device *dev, bool state);
/* Notify the bus has transferred the tx packet to firmware */
void brcmf_txcomplete(struct device *dev, struct sk_buff *txp, bool success);
int brcmf_bus_start(struct device *dev);
s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data,
u32 len);
void brcmf_bus_add_txhdrlen(struct device *dev, uint len);
#ifdef CONFIG_BRCMFMAC_SDIO
void brcmf_sdio_exit(void);
void brcmf_sdio_init(void);
void brcmf_sdio_register(void);
#endif
#ifdef CONFIG_BRCMFMAC_USB
void brcmf_usb_exit(void);
void brcmf_usb_register(void);
#endif
#endif /* _BRCMF_BUS_H_ */
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