[mirror_ubuntu-zesty-kernel.git] / include / net / irda / irda_device.h

/*********************************************************************
 *                
 * Filename:      irda_device.h
 * Version:       0.9
 * Description:   Contains various declarations used by the drivers
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Tue Apr 14 12:41:42 1998
 * Modified at:   Mon Mar 20 09:08:57 2000
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * 
 *     Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
 *     Copyright (c) 1998 Thomas Davis, <ratbert@radiks.net>,
 *     Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
 *
 *     This program is free software; you can redistribute it and/or 
 *     modify it under the terms of the GNU General Public License as 
 *     published by the Free Software Foundation; either version 2 of 
 *     the License, or (at your option) any later version.
 * 
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License 
 *     along with this program; if not, see <http://www.gnu.org/licenses/>.
 *     
 ********************************************************************/

/*
 * This header contains all the IrDA definitions a driver really
 * needs, and therefore the driver should not need to include
 * any other IrDA headers - Jean II
 */

#ifndef IRDA_DEVICE_H
#define IRDA_DEVICE_H

#include <linux/tty.h>
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>		/* struct sk_buff */
#include <linux/irda.h>
#include <linux/types.h>

#include <net/pkt_sched.h>
#include <net/irda/irda.h>
#include <net/irda/qos.h>		/* struct qos_info */
#include <net/irda/irqueue.h>		/* irda_queue_t */

/* A few forward declarations (to make compiler happy) */
struct irlap_cb;

/* Some non-standard interface flags (should not conflict with any in if.h) */
#define IFF_SIR 	0x0001 /* Supports SIR speeds */
#define IFF_MIR 	0x0002 /* Supports MIR speeds */
#define IFF_FIR 	0x0004 /* Supports FIR speeds */
#define IFF_VFIR        0x0008 /* Supports VFIR speeds */
#define IFF_PIO   	0x0010 /* Supports PIO transfer of data */
#define IFF_DMA		0x0020 /* Supports DMA transfer of data */
#define IFF_SHM         0x0040 /* Supports shared memory data transfers */
#define IFF_DONGLE      0x0080 /* Interface has a dongle attached */
#define IFF_AIR         0x0100 /* Supports Advanced IR (AIR) standards */

#define IO_XMIT 0x01
#define IO_RECV 0x02

typedef enum {
	IRDA_IRLAP, /* IrDA mode, and deliver to IrLAP */
	IRDA_RAW,   /* IrDA mode */
	SHARP_ASK,
	TV_REMOTE,  /* Also known as Consumer Electronics IR */
} INFRARED_MODE;

typedef enum {
	IRDA_TASK_INIT,        /* All tasks are initialized with this state */
	IRDA_TASK_DONE,        /* Signals that the task is finished */
	IRDA_TASK_WAIT,
	IRDA_TASK_WAIT1,
	IRDA_TASK_WAIT2,
	IRDA_TASK_WAIT3,
	IRDA_TASK_CHILD_INIT,  /* Initializing child task */
	IRDA_TASK_CHILD_WAIT,  /* Waiting for child task to finish */
	IRDA_TASK_CHILD_DONE   /* Child task is finished */
} IRDA_TASK_STATE;

struct irda_task;
typedef int (*IRDA_TASK_CALLBACK) (struct irda_task *task);

struct irda_task {
	irda_queue_t q;
	magic_t magic;

	IRDA_TASK_STATE state;
	IRDA_TASK_CALLBACK function;
	IRDA_TASK_CALLBACK finished;

	struct irda_task *parent;
	struct timer_list timer;

	void *instance; /* Instance being called */
	void *param;    /* Parameter to be used by instance */
};

/* Dongle info */
struct dongle_reg;
typedef struct {
	struct dongle_reg *issue;     /* Registration info */
	struct net_device *dev;           /* Device we are attached to */
	struct irda_task *speed_task; /* Task handling speed change */
	struct irda_task *reset_task; /* Task handling reset */
	__u32 speed;                  /* Current speed */

	/* Callbacks to the IrDA device driver */
	int (*set_mode)(struct net_device *, int mode);
	int (*read)(struct net_device *dev, __u8 *buf, int len);
	int (*write)(struct net_device *dev, __u8 *buf, int len);
	int (*set_dtr_rts)(struct net_device *dev, int dtr, int rts);
} dongle_t;

/* Dongle registration info */
struct dongle_reg {
	irda_queue_t q;         /* Must be first */
	IRDA_DONGLE type;

	void (*open)(dongle_t *dongle, struct qos_info *qos);
	void (*close)(dongle_t *dongle);
	int  (*reset)(struct irda_task *task);
	int  (*change_speed)(struct irda_task *task);
	struct module *owner;
};

/* 
 * Per-packet information we need to hide inside sk_buff 
 * (must not exceed 48 bytes, check with struct sk_buff)
 * The default_qdisc_pad field is a temporary hack.
 */
struct irda_skb_cb {
	unsigned int default_qdisc_pad;
	magic_t magic;       /* Be sure that we can trust the information */
	__u32   next_speed;  /* The Speed to be set *after* this frame */
	__u16   mtt;         /* Minimum turn around time */
	__u16   xbofs;       /* Number of xbofs required, used by SIR mode */
	__u16   next_xbofs;  /* Number of xbofs required *after* this frame */
	void    *context;    /* May be used by drivers */
	void    (*destructor)(struct sk_buff *skb); /* Used for flow control */
	__u16   xbofs_delay; /* Number of xbofs used for generating the mtt */
	__u8    line;        /* Used by IrCOMM in IrLPT mode */
};

/* Chip specific info */
typedef struct {
	int cfg_base;         /* Config register IO base */
        int sir_base;         /* SIR IO base */
	int fir_base;         /* FIR IO base */
	int mem_base;         /* Shared memory base */
        int sir_ext;          /* Length of SIR iobase */
	int fir_ext;          /* Length of FIR iobase */
        int irq, irq2;        /* Interrupts used */
        int dma, dma2;        /* DMA channel(s) used */
        int fifo_size;        /* FIFO size */
        int irqflags;         /* interrupt flags (ie, IRQF_SHARED) */
	int direction;        /* Link direction, used by some FIR drivers */
	int enabled;          /* Powered on? */
	int suspended;        /* Suspended by APM */
	__u32 speed;          /* Currently used speed */
	__u32 new_speed;      /* Speed we must change to when Tx is finished */
	int dongle_id;        /* Dongle or transceiver currently used */
} chipio_t;

/* IO buffer specific info (inspired by struct sk_buff) */
typedef struct {
	int state;            /* Receiving state (transmit state not used) */
	int in_frame;         /* True if receiving frame */

	__u8 *head;	      /* start of buffer */
	__u8 *data;	      /* start of data in buffer */

	int len;	      /* current length of data */
	int truesize;	      /* total allocated size of buffer */
	__u16 fcs;

	struct sk_buff *skb;	/* ZeroCopy Rx in async_unwrap_char() */
} iobuff_t;

/* Maximum SIR frame (skb) that we expect to receive *unwrapped*.
 * Max LAP MTU (I field) is 2048 bytes max (IrLAP 1.1, chapt 6.6.5, p40).
 * Max LAP header is 2 bytes (for now).
 * Max CRC is 2 bytes at SIR, 4 bytes at FIR. 
 * Need 1 byte for skb_reserve() to align IP header for IrLAN.
 * Add a few extra bytes just to be safe (buffer is power of two anyway)
 * Jean II */
#define IRDA_SKB_MAX_MTU	2064
/* Maximum SIR frame that we expect to send, wrapped (i.e. with XBOFS
 * and escaped characters on top of above). */
#define IRDA_SIR_MAX_FRAME	4269

/* The SIR unwrapper async_unwrap_char() will use a Rx-copy-break mechanism
 * when using the optional ZeroCopy Rx, where only small frames are memcpy
 * to a smaller skb to save memory. This is the threshold under which copy
 * will happen (and over which it won't happen).
 * Some FIR drivers may use this #define as well...
 * This is the same value as various Ethernet drivers. - Jean II */
#define IRDA_RX_COPY_THRESHOLD  256

/* Function prototypes */
int  irda_device_init(void);
void irda_device_cleanup(void);

/* IrLAP entry points used by the drivers.
 * We declare them here to avoid the driver pulling a whole bunch stack
 * headers they don't really need - Jean II */
struct irlap_cb *irlap_open(struct net_device *dev, struct qos_info *qos,
			    const char *hw_name);
void irlap_close(struct irlap_cb *self);

/* Interface to be uses by IrLAP */
void irda_device_set_media_busy(struct net_device *dev, int status);
int  irda_device_is_media_busy(struct net_device *dev);
int  irda_device_is_receiving(struct net_device *dev);

/* Interface for internal use */
static inline int irda_device_txqueue_empty(const struct net_device *dev)
{
	return qdisc_all_tx_empty(dev);
}
int  irda_device_set_raw_mode(struct net_device* self, int status);
struct net_device *alloc_irdadev(int sizeof_priv);

void irda_setup_dma(int channel, dma_addr_t buffer, int count, int mode);

/*
 * Function irda_get_mtt (skb)
 *
 *    Utility function for getting the minimum turnaround time out of 
 *    the skb, where it has been hidden in the cb field.
 */
static inline __u16 irda_get_mtt(const struct sk_buff *skb)
{
	const struct irda_skb_cb *cb = (const struct irda_skb_cb *) skb->cb;
	return (cb->magic == LAP_MAGIC) ? cb->mtt : 10000;
}

/*
 * Function irda_get_next_speed (skb)
 *
 *    Extract the speed that should be set *after* this frame from the skb
 *
 * Note : return -1 for user space frames
 */
static inline __u32 irda_get_next_speed(const struct sk_buff *skb)
{
	const struct irda_skb_cb *cb = (const struct irda_skb_cb *) skb->cb;
	return (cb->magic == LAP_MAGIC) ? cb->next_speed : -1;
}

/*
 * Function irda_get_next_xbofs (skb)
 *
 *    Extract the xbofs that should be set for this frame from the skb
 *
 * Note : default to 10 for user space frames
 */
static inline __u16 irda_get_xbofs(const struct sk_buff *skb)
{
	const struct irda_skb_cb *cb = (const struct irda_skb_cb *) skb->cb;
	return (cb->magic == LAP_MAGIC) ? cb->xbofs : 10;
}

/*
 * Function irda_get_next_xbofs (skb)
 *
 *    Extract the xbofs that should be set *after* this frame from the skb
 *
 * Note : return -1 for user space frames
 */
static inline __u16 irda_get_next_xbofs(const struct sk_buff *skb)
{
	const struct irda_skb_cb *cb = (const struct irda_skb_cb *) skb->cb;
	return (cb->magic == LAP_MAGIC) ? cb->next_xbofs : -1;
}
#endif /* IRDA_DEVICE_H */
Commit	Line	Data
1da177e4 LT	1	/*********************************************************************
	2	*
	3	* Filename: irda_device.h
	4	* Version: 0.9
	5	* Description: Contains various declarations used by the drivers
	6	* Status: Experimental.
	7	* Author: Dag Brattli <dagb@cs.uit.no>
	8	* Created at: Tue Apr 14 12:41:42 1998
	9	* Modified at: Mon Mar 20 09:08:57 2000
	10	* Modified by: Dag Brattli <dagb@cs.uit.no>
	11	*
	12	* Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
	13	* Copyright (c) 1998 Thomas Davis, <ratbert@radiks.net>,
	14	* Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
	15	*
	16	* This program is free software; you can redistribute it and/or
	17	* modify it under the terms of the GNU General Public License as
	18	* published by the Free Software Foundation; either version 2 of
	19	* the License, or (at your option) any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
a6227e26	27	* along with this program; if not, see <http://www.gnu.org/licenses/>.
1da177e4 LT	28	*
	29	********************************************************************/
	30
	31	/*
	32	* This header contains all the IrDA definitions a driver really
	33	* needs, and therefore the driver should not need to include
	34	* any other IrDA headers - Jean II
	35	*/
	36
	37	#ifndef IRDA_DEVICE_H
	38	#define IRDA_DEVICE_H
	39
1da177e4 LT	40	#include <linux/tty.h>
	41	#include <linux/netdevice.h>
	42	#include <linux/spinlock.h>
	43	#include <linux/skbuff.h> /* struct sk_buff */
	44	#include <linux/irda.h>
	45	#include <linux/types.h>
	46
	47	#include <net/pkt_sched.h>
	48	#include <net/irda/irda.h>
	49	#include <net/irda/qos.h> /* struct qos_info */
	50	#include <net/irda/irqueue.h> /* irda_queue_t */
	51
	52	/* A few forward declarations (to make compiler happy) */
	53	struct irlap_cb;
	54
	55	/* Some non-standard interface flags (should not conflict with any in if.h) */
	56	#define IFF_SIR 0x0001 /* Supports SIR speeds */
	57	#define IFF_MIR 0x0002 /* Supports MIR speeds */
	58	#define IFF_FIR 0x0004 /* Supports FIR speeds */
	59	#define IFF_VFIR 0x0008 /* Supports VFIR speeds */
	60	#define IFF_PIO 0x0010 /* Supports PIO transfer of data */
	61	#define IFF_DMA 0x0020 /* Supports DMA transfer of data */
	62	#define IFF_SHM 0x0040 /* Supports shared memory data transfers */
	63	#define IFF_DONGLE 0x0080 /* Interface has a dongle attached */
	64	#define IFF_AIR 0x0100 /* Supports Advanced IR (AIR) standards */
	65
	66	#define IO_XMIT 0x01
	67	#define IO_RECV 0x02
	68
	69	typedef enum {
	70	IRDA_IRLAP, /* IrDA mode, and deliver to IrLAP */
	71	IRDA_RAW, /* IrDA mode */
	72	SHARP_ASK,
	73	TV_REMOTE, /* Also known as Consumer Electronics IR */
	74	} INFRARED_MODE;
	75
	76	typedef enum {
	77	IRDA_TASK_INIT, /* All tasks are initialized with this state */
	78	IRDA_TASK_DONE, /* Signals that the task is finished */
	79	IRDA_TASK_WAIT,
	80	IRDA_TASK_WAIT1,
	81	IRDA_TASK_WAIT2,
	82	IRDA_TASK_WAIT3,
	83	IRDA_TASK_CHILD_INIT, /* Initializing child task */
	84	IRDA_TASK_CHILD_WAIT, /* Waiting for child task to finish */
	85	IRDA_TASK_CHILD_DONE /* Child task is finished */
	86	} IRDA_TASK_STATE;
	87
	88	struct irda_task;
	89	typedef int (IRDA_TASK_CALLBACK) (struct irda_task task);
	90
	91	struct irda_task {
	92	irda_queue_t q;
	93	magic_t magic;
	94
	95	IRDA_TASK_STATE state;
	96	IRDA_TASK_CALLBACK function;
	97	IRDA_TASK_CALLBACK finished;
	98
	99	struct irda_task *parent;
	100	struct timer_list timer;
	101
	102	void instance; / Instance being called */
	103	void param; / Parameter to be used by instance */
104	};
105
106	/* Dongle info */
107	struct dongle_reg;
108	typedef struct {
109	struct dongle_reg issue; / Registration info */
110	struct net_device dev; / Device we are attached to */
111	struct irda_task speed_task; / Task handling speed change */
112	struct irda_task reset_task; / Task handling reset */
113	__u32 speed; /* Current speed */
114
115	/* Callbacks to the IrDA device driver */
116	int (set_mode)(struct net_device , int mode);
117	int (read)(struct net_device dev, __u8 *buf, int len);
118	int (write)(struct net_device dev, __u8 *buf, int len);
119	int (set_dtr_rts)(struct net_device dev, int dtr, int rts);
120	} dongle_t;
121
122	/* Dongle registration info */
123	struct dongle_reg {
124	irda_queue_t q; /* Must be first */
125	IRDA_DONGLE type;
126
127	void (open)(dongle_t dongle, struct qos_info *qos);
128	void (close)(dongle_t dongle);
129	int (reset)(struct irda_task task);
130	int (change_speed)(struct irda_task task);
131	struct module *owner;
132	};
133
134	/*
135	* Per-packet information we need to hide inside sk_buff
69c30e1e SO	136	* (must not exceed 48 bytes, check with struct sk_buff)
69c30e1e SO	137	* The default_qdisc_pad field is a temporary hack.
1da177e4 LT	138	*/
1da177e4 LT	139	struct irda_skb_cb {
69c30e1e	140	unsigned int default_qdisc_pad;
1da177e4 LT	141	magic_t magic; /* Be sure that we can trust the information */
	142	__u32 next_speed; /* The Speed to be set after this frame */
	143	__u16 mtt; /* Minimum turn around time */
	144	__u16 xbofs; /* Number of xbofs required, used by SIR mode */
	145	__u16 next_xbofs; /* Number of xbofs required after this frame */
	146	void context; / May be used by drivers */
	147	void (destructor)(struct sk_buff skb); /* Used for flow control */
	148	__u16 xbofs_delay; /* Number of xbofs used for generating the mtt */
	149	__u8 line; /* Used by IrCOMM in IrLPT mode */
	150	};
	151
	152	/* Chip specific info */
	153	typedef struct {
	154	int cfg_base; /* Config register IO base */
	155	int sir_base; /* SIR IO base */
	156	int fir_base; /* FIR IO base */
	157	int mem_base; /* Shared memory base */
	158	int sir_ext; /* Length of SIR iobase */
	159	int fir_ext; /* Length of FIR iobase */
	160	int irq, irq2; /* Interrupts used */
	161	int dma, dma2; /* DMA channel(s) used */
	162	int fifo_size; /* FIFO size */
78dea8cc	163	int irqflags; /* interrupt flags (ie, IRQF_SHARED) */
1da177e4 LT	164	int direction; /* Link direction, used by some FIR drivers */
	165	int enabled; /* Powered on? */
	166	int suspended; /* Suspended by APM */
	167	__u32 speed; /* Currently used speed */
	168	__u32 new_speed; /* Speed we must change to when Tx is finished */
	169	int dongle_id; /* Dongle or transceiver currently used */
	170	} chipio_t;
	171
	172	/* IO buffer specific info (inspired by struct sk_buff) */
	173	typedef struct {
	174	int state; /* Receiving state (transmit state not used) */
	175	int in_frame; /* True if receiving frame */
	176
	177	__u8 head; / start of buffer */
	178	__u8 data; / start of data in buffer */
	179
	180	int len; /* current length of data */
	181	int truesize; /* total allocated size of buffer */
	182	__u16 fcs;
	183
	184	struct sk_buff skb; / ZeroCopy Rx in async_unwrap_char() */
	185	} iobuff_t;
	186
	187	/* Maximum SIR frame (skb) that we expect to receive unwrapped.
	188	* Max LAP MTU (I field) is 2048 bytes max (IrLAP 1.1, chapt 6.6.5, p40).
	189	* Max LAP header is 2 bytes (for now).
	190	* Max CRC is 2 bytes at SIR, 4 bytes at FIR.
	191	* Need 1 byte for skb_reserve() to align IP header for IrLAN.
	192	* Add a few extra bytes just to be safe (buffer is power of two anyway)
	193	* Jean II */
	194	#define IRDA_SKB_MAX_MTU 2064
	195	/* Maximum SIR frame that we expect to send, wrapped (i.e. with XBOFS
	196	* and escaped characters on top of above). */
	197	#define IRDA_SIR_MAX_FRAME 4269
	198
	199	/* The SIR unwrapper async_unwrap_char() will use a Rx-copy-break mechanism
	200	* when using the optional ZeroCopy Rx, where only small frames are memcpy
	201	* to a smaller skb to save memory. This is the threshold under which copy
	202	* will happen (and over which it won't happen).
	203	* Some FIR drivers may use this #define as well...
	204	* This is the same value as various Ethernet drivers. - Jean II */
	205	#define IRDA_RX_COPY_THRESHOLD 256
	206
	207	/* Function prototypes */
	208	int irda_device_init(void);
	209	void irda_device_cleanup(void);
	210
	211	/* IrLAP entry points used by the drivers.
	212	* We declare them here to avoid the driver pulling a whole bunch stack
	213	* headers they don't really need - Jean II */
	214	struct irlap_cb irlap_open(struct net_device dev, struct qos_info *qos,
	215	const char *hw_name);
	216	void irlap_close(struct irlap_cb *self);
	217
	218	/* Interface to be uses by IrLAP */
	219	void irda_device_set_media_busy(struct net_device *dev, int status);
	220	int irda_device_is_media_busy(struct net_device *dev);
	221	int irda_device_is_receiving(struct net_device *dev);
	222
	223	/* Interface for internal use */
	224	static inline int irda_device_txqueue_empty(const struct net_device *dev)
	225	{
3e745dd6	226	return qdisc_all_tx_empty(dev);
1da177e4 LT	227	}
	228	int irda_device_set_raw_mode(struct net_device* self, int status);
	229	struct net_device *alloc_irdadev(int sizeof_priv);
	230
1da177e4	231	void irda_setup_dma(int channel, dma_addr_t buffer, int count, int mode);
1da177e4	232
1da177e4 LT	233	/*
	234	* Function irda_get_mtt (skb)
	235	*
	236	* Utility function for getting the minimum turnaround time out of
	237	* the skb, where it has been hidden in the cb field.
	238	*/
	239	static inline __u16 irda_get_mtt(const struct sk_buff *skb)
	240	{
	241	const struct irda_skb_cb cb = (const struct irda_skb_cb ) skb->cb;
	242	return (cb->magic == LAP_MAGIC) ? cb->mtt : 10000;
	243	}
	244
	245	/*
	246	* Function irda_get_next_speed (skb)
	247	*
	248	* Extract the speed that should be set after this frame from the skb
	249	*
	250	* Note : return -1 for user space frames
	251	*/
	252	static inline __u32 irda_get_next_speed(const struct sk_buff *skb)
	253	{
	254	const struct irda_skb_cb cb = (const struct irda_skb_cb ) skb->cb;
	255	return (cb->magic == LAP_MAGIC) ? cb->next_speed : -1;
	256	}
	257
	258	/*
	259	* Function irda_get_next_xbofs (skb)
	260	*
	261	* Extract the xbofs that should be set for this frame from the skb
	262	*
	263	* Note : default to 10 for user space frames
	264	*/
	265	static inline __u16 irda_get_xbofs(const struct sk_buff *skb)
	266	{
	267	const struct irda_skb_cb cb = (const struct irda_skb_cb ) skb->cb;
	268	return (cb->magic == LAP_MAGIC) ? cb->xbofs : 10;
	269	}
	270
	271	/*
	272	* Function irda_get_next_xbofs (skb)
	273	*
	274	* Extract the xbofs that should be set after this frame from the skb
	275	*
	276	* Note : return -1 for user space frames
	277	*/
	278	static inline __u16 irda_get_next_xbofs(const struct sk_buff *skb)
	279	{
	280	const struct irda_skb_cb cb = (const struct irda_skb_cb ) skb->cb;
	281	return (cb->magic == LAP_MAGIC) ? cb->next_xbofs : -1;
	282	}
	283	#endif /* IRDA_DEVICE_H */
	284
	285