2 * Copyright (c) 2010 Broadcom Corporation
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.
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.
22 /* IDs of the 6 default common rings of msgbuf protocol */
23 #define BRCMF_H2D_MSGRING_CONTROL_SUBMIT 0
24 #define BRCMF_H2D_MSGRING_RXPOST_SUBMIT 1
25 #define BRCMF_D2H_MSGRING_CONTROL_COMPLETE 2
26 #define BRCMF_D2H_MSGRING_TX_COMPLETE 3
27 #define BRCMF_D2H_MSGRING_RX_COMPLETE 4
29 #define BRCMF_NROF_H2D_COMMON_MSGRINGS 2
30 #define BRCMF_NROF_D2H_COMMON_MSGRINGS 3
31 #define BRCMF_NROF_COMMON_MSGRINGS (BRCMF_NROF_H2D_COMMON_MSGRINGS + \
32 BRCMF_NROF_D2H_COMMON_MSGRINGS)
34 /* The level of bus communication with the dongle */
35 enum brcmf_bus_state {
36 BRCMF_BUS_UNKNOWN, /* Not determined yet */
37 BRCMF_BUS_NOMEDIUM, /* No medium access to dongle */
38 BRCMF_BUS_DOWN, /* Not ready for frame transfers */
39 BRCMF_BUS_LOAD, /* Download access only (CPU reset) */
40 BRCMF_BUS_DATA /* Ready for frame transfers */
43 /* The level of bus communication with the dongle */
44 enum brcmf_bus_protocol_type {
49 struct brcmf_bus_dcmd {
53 struct list_head list;
57 * struct brcmf_bus_ops - bus callback operations.
59 * @preinit: execute bus/device specific dongle init commands (optional).
60 * @init: prepare for communication with dongle.
61 * @stop: clear pending frames, disable data flow.
62 * @txdata: send a data frame to the dongle. When the data
63 * has been transferred, the common driver must be
64 * notified using brcmf_txcomplete(). The common
65 * driver calls this function with interrupts
67 * @txctl: transmit a control request message to dongle.
68 * @rxctl: receive a control response message from dongle.
69 * @gettxq: obtain a reference of bus transmit queue (optional).
71 * This structure provides an abstract interface towards the
72 * bus specific driver. For control messages to common driver
73 * will assure there is only one active transaction. Unless
74 * indicated otherwise these callbacks are mandatory.
76 struct brcmf_bus_ops {
77 int (*preinit)(struct device *dev);
78 void (*stop)(struct device *dev);
79 int (*txdata)(struct device *dev, struct sk_buff *skb);
80 int (*txctl)(struct device *dev, unsigned char *msg, uint len);
81 int (*rxctl)(struct device *dev, unsigned char *msg, uint len);
82 struct pktq * (*gettxq)(struct device *dev);
87 * struct brcmf_bus_msgbuf - bus ringbuf if in case of msgbuf.
89 * @commonrings: commonrings which are always there.
90 * @flowrings: commonrings which are dynamically created and destroyed for data.
91 * @rx_dataoffset: if set then all rx data has this this offset.
92 * @max_rxbufpost: maximum number of buffers to post for rx.
93 * @nrof_flowrings: number of flowrings.
95 struct brcmf_bus_msgbuf {
96 struct brcmf_commonring *commonrings[BRCMF_NROF_COMMON_MSGRINGS];
97 struct brcmf_commonring **flowrings;
105 * struct brcmf_bus - interface structure between common and bus layer
107 * @bus_priv: pointer to private bus device.
108 * @proto_type: protocol type, bcdc or msgbuf
109 * @dev: device pointer of bus device.
110 * @drvr: public driver information.
111 * @state: operational state of the bus interface.
112 * @maxctl: maximum size for rxctl request message.
113 * @tx_realloc: number of tx packets realloced for headroom.
114 * @dstats: dongle-based statistical data.
115 * @dcmd_list: bus/device specific dongle initialization commands.
116 * @chip: device identifier of the dongle chip.
117 * @chiprev: revision of the dongle chip.
121 struct brcmf_sdio_dev *sdio;
122 struct brcmf_usbdev *usb;
123 struct brcmf_pciedev *pcie;
125 enum brcmf_bus_protocol_type proto_type;
127 struct brcmf_pub *drvr;
128 enum brcmf_bus_state state;
130 unsigned long tx_realloc;
133 bool always_use_fws_queue;
135 struct brcmf_bus_ops *ops;
136 struct brcmf_bus_msgbuf *msgbuf;
142 static inline int brcmf_bus_preinit(struct brcmf_bus *bus)
144 if (!bus->ops->preinit)
146 return bus->ops->preinit(bus->dev);
149 static inline void brcmf_bus_stop(struct brcmf_bus *bus)
151 bus->ops->stop(bus->dev);
154 static inline int brcmf_bus_txdata(struct brcmf_bus *bus, struct sk_buff *skb)
156 return bus->ops->txdata(bus->dev, skb);
160 int brcmf_bus_txctl(struct brcmf_bus *bus, unsigned char *msg, uint len)
162 return bus->ops->txctl(bus->dev, msg, len);
166 int brcmf_bus_rxctl(struct brcmf_bus *bus, unsigned char *msg, uint len)
168 return bus->ops->rxctl(bus->dev, msg, len);
172 struct pktq *brcmf_bus_gettxq(struct brcmf_bus *bus)
174 if (!bus->ops->gettxq)
175 return ERR_PTR(-ENOENT);
177 return bus->ops->gettxq(bus->dev);
180 static inline bool brcmf_bus_ready(struct brcmf_bus *bus)
182 return bus->state == BRCMF_BUS_LOAD || bus->state == BRCMF_BUS_DATA;
185 static inline void brcmf_bus_change_state(struct brcmf_bus *bus,
186 enum brcmf_bus_state new_state)
188 /* NOMEDIUM is permanent */
189 if (bus->state == BRCMF_BUS_NOMEDIUM)
192 brcmf_dbg(TRACE, "%d -> %d\n", bus->state, new_state);
193 bus->state = new_state;
197 * interface functions from common layer
200 bool brcmf_c_prec_enq(struct device *dev, struct pktq *q, struct sk_buff *pkt,
203 /* Receive frame for delivery to OS. Callee disposes of rxp. */
204 void brcmf_rx_frame(struct device *dev, struct sk_buff *rxp);
206 /* Indication from bus module regarding presence/insertion of dongle. */
207 int brcmf_attach(struct device *dev);
208 /* Indication from bus module regarding removal/absence of dongle */
209 void brcmf_detach(struct device *dev);
210 /* Indication from bus module that dongle should be reset */
211 void brcmf_dev_reset(struct device *dev);
212 /* Indication from bus module to change flow-control state */
213 void brcmf_txflowblock(struct device *dev, bool state);
215 /* Notify the bus has transferred the tx packet to firmware */
216 void brcmf_txcomplete(struct device *dev, struct sk_buff *txp, bool success);
218 int brcmf_bus_start(struct device *dev);
219 s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data,
221 void brcmf_bus_add_txhdrlen(struct device *dev, uint len);
223 #ifdef CONFIG_BRCMFMAC_SDIO
224 void brcmf_sdio_exit(void);
225 void brcmf_sdio_init(void);
226 void brcmf_sdio_register(void);
228 #ifdef CONFIG_BRCMFMAC_USB
229 void brcmf_usb_exit(void);
230 void brcmf_usb_register(void);
233 #endif /* _BRCMF_BUS_H_ */