/*
 * Linux Plug and Play Support
 * Copyright by Adam Belay <ambx1@neo.rr.com>
 *
 */

#ifndef _LINUX_PNP_H
#define _LINUX_PNP_H

#ifdef __KERNEL__

#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>

#define PNP_MAX_PORT		8
#define PNP_MAX_MEM		4
#define PNP_MAX_IRQ		2
#define PNP_MAX_DMA		2
#define PNP_MAX_DEVICES		8
#define PNP_ID_LEN		8

struct pnp_protocol;
struct pnp_dev;


/*
 * Resource Management
 */

/* Use these instead of directly reading pnp_dev to get resource information */
#define pnp_port_start(dev,bar)   ((dev)->res.port_resource[(bar)].start)
#define pnp_port_end(dev,bar)     ((dev)->res.port_resource[(bar)].end)
#define pnp_port_flags(dev,bar)   ((dev)->res.port_resource[(bar)].flags)
#define pnp_port_valid(dev,bar)   (pnp_port_flags((dev),(bar)) & IORESOURCE_IO)
#define pnp_port_len(dev,bar) \
	((pnp_port_start((dev),(bar)) == 0 &&	\
	  pnp_port_end((dev),(bar)) ==		\
	  pnp_port_start((dev),(bar))) ? 0 :	\
	  					\
	 (pnp_port_end((dev),(bar)) -		\
	  pnp_port_start((dev),(bar)) + 1))

#define pnp_mem_start(dev,bar)   ((dev)->res.mem_resource[(bar)].start)
#define pnp_mem_end(dev,bar)     ((dev)->res.mem_resource[(bar)].end)
#define pnp_mem_flags(dev,bar)   ((dev)->res.mem_resource[(bar)].flags)
#define pnp_mem_valid(dev,bar)   (pnp_mem_flags((dev),(bar)) & IORESOURCE_MEM)
#define pnp_mem_len(dev,bar) \
	((pnp_mem_start((dev),(bar)) == 0 &&	\
	  pnp_mem_end((dev),(bar)) ==		\
	  pnp_mem_start((dev),(bar))) ? 0 :	\
	  					\
	 (pnp_mem_end((dev),(bar)) -		\
	  pnp_mem_start((dev),(bar)) + 1))

#define pnp_irq(dev,bar)	 ((dev)->res.irq_resource[(bar)].start)
#define pnp_irq_flags(dev,bar)	 ((dev)->res.irq_resource[(bar)].flags)
#define pnp_irq_valid(dev,bar)   (pnp_irq_flags((dev),(bar)) & IORESOURCE_IRQ)

#define pnp_dma(dev,bar)	 ((dev)->res.dma_resource[(bar)].start)
#define pnp_dma_flags(dev,bar)	 ((dev)->res.dma_resource[(bar)].flags)
#define pnp_dma_valid(dev,bar)   (pnp_dma_flags((dev),(bar)) & IORESOURCE_DMA)

#define PNP_PORT_FLAG_16BITADDR	(1<<0)
#define PNP_PORT_FLAG_FIXED	(1<<1)

struct pnp_port {
	unsigned short min;		/* min base number */
	unsigned short max;		/* max base number */
	unsigned char align;		/* align boundary */
	unsigned char size;		/* size of range */
	unsigned char flags;		/* port flags */
	unsigned char pad;		/* pad */
	struct pnp_port *next;		/* next port */
};

struct pnp_irq {
	unsigned short map;		/* bitmaks for IRQ lines */
	unsigned char flags;		/* IRQ flags */
	unsigned char pad;		/* pad */
	struct pnp_irq *next;		/* next IRQ */
};

struct pnp_dma {
	unsigned char map;		/* bitmask for DMA channels */
	unsigned char flags;		/* DMA flags */
	struct pnp_dma *next;		/* next port */
};

struct pnp_mem {
	unsigned int min;		/* min base number */
	unsigned int max;		/* max base number */
	unsigned int align;		/* align boundary */
	unsigned int size;		/* size of range */
	unsigned char flags;		/* memory flags */
	unsigned char pad;		/* pad */
	struct pnp_mem *next;		/* next memory resource */
};

#define PNP_RES_PRIORITY_PREFERRED	0
#define PNP_RES_PRIORITY_ACCEPTABLE	1
#define PNP_RES_PRIORITY_FUNCTIONAL	2
#define PNP_RES_PRIORITY_INVALID	65535

struct pnp_resources {
	unsigned short priority;	/* priority */
	struct pnp_port *port;		/* first port */
	struct pnp_irq *irq;		/* first IRQ */
	struct pnp_dma *dma;		/* first DMA */
	struct pnp_mem *mem;		/* first memory resource */
	struct pnp_dev *dev;		/* parent */
	struct pnp_resources *dep;	/* dependent resources */
};

struct pnp_rule_table {
	int depnum;
	struct pnp_port *port[PNP_MAX_PORT];
	struct pnp_irq *irq[PNP_MAX_IRQ];
	struct pnp_dma *dma[PNP_MAX_DMA];
	struct pnp_mem *mem[PNP_MAX_MEM];
};

struct pnp_resource_table {
	struct resource port_resource[PNP_MAX_PORT];
	struct resource mem_resource[PNP_MAX_MEM];
	struct resource dma_resource[PNP_MAX_DMA];
	struct resource irq_resource[PNP_MAX_IRQ];
};


/*
 * Device Managemnt
 */

struct pnp_card {
	struct device dev;		/* Driver Model device interface */
	unsigned char number;		/* used as an index, must be unique */
	struct list_head global_list;	/* node in global list of cards */
	struct list_head protocol_list;	/* node in protocol's list of cards */
	struct list_head devices;	/* devices attached to the card */

	struct pnp_protocol * protocol;
	struct pnp_id * id;		/* contains supported EISA IDs*/

	void	      * protocol_data;	/* Used to store protocol specific data */
	unsigned char	pnpver;		/* Plug & Play version */
	unsigned char	productver;	/* product version */
	unsigned int	serial;		/* serial number */
	unsigned char	checksum;	/* if zero - checksum passed */
	struct proc_dir_entry *procdir;	/* directory entry in /proc/bus/isapnp */
};

#define global_to_pnp_card(n) list_entry(n, struct pnp_card, global_list)
#define protocol_to_pnp_card(n) list_entry(n, struct pnp_card, protocol_list)
#define to_pnp_card(n) container_of(n, struct pnp_card, dev)
#define pnp_for_each_card(card) \
	for((card) = global_to_pnp_card(pnp_cards.next); \
	(card) != global_to_pnp_card(&pnp_cards); \
	(card) = global_to_pnp_card((card)->global_list.next))

static inline void *pnp_get_card_protodata (struct pnp_card *pcard)
{
	return pcard->protocol_data;
}

static inline void pnp_set_card_protodata (struct pnp_card *pcard, void *data)
{
	pcard->protocol_data = data;
}

struct pnp_card_link {
	struct pnp_card * card;
	struct pnp_card_driver * driver;
	void * driver_data;
};

static inline void *pnp_get_card_drvdata (struct pnp_card_link *pcard)
{
	return pcard->driver_data;
}

static inline void pnp_set_card_drvdata (struct pnp_card_link *pcard, void *data)
{
	pcard->driver_data = data;
}

struct pnp_dev {
	struct device dev;		/* Driver Model device interface */
	unsigned char number;		/* used as an index, must be unique */
	int active;
	int capabilities;
	int status;

	struct list_head global_list;	/* node in global list of devices */
	struct list_head protocol_list;	/* node in list of device's protocol */
	struct list_head card_list;	/* node in card's list of devices */
	struct list_head rdev_list;	/* node in cards list of requested devices */

	struct pnp_protocol * protocol;
	struct pnp_card * card;		/* card the device is attached to, none if NULL */
	struct pnp_driver * driver;
	struct pnp_card_link * card_link;

	struct pnp_id		      * id;		/* supported EISA IDs*/
	struct pnp_resource_table	res;		/* contains the currently chosen resources */
	struct pnp_resources	      * possible;	/* a list of possible resources */
	struct pnp_rule_table	      * rule;		/* the current possible resource set */
	int 				config_mode;	/* flags that determine how the device's resources should be configured */

	void * protocol_data;		/* Used to store protocol specific data */
	unsigned short	regs;		/* ISAPnP: supported registers */
	int 		flags;		/* used by protocols */
	struct proc_dir_entry *procent;	/* device entry in /proc/bus/isapnp */
};

#define global_to_pnp_dev(n) list_entry(n, struct pnp_dev, global_list)
#define card_to_pnp_dev(n) list_entry(n, struct pnp_dev, card_list)
#define protocol_to_pnp_dev(n) list_entry(n, struct pnp_dev, protocol_list)
#define	to_pnp_dev(n) container_of(n, struct pnp_dev, dev)
#define pnp_for_each_dev(dev) \
	for((dev) = global_to_pnp_dev(pnp_global.next); \
	(dev) != global_to_pnp_dev(&pnp_global); \
	(dev) = global_to_pnp_dev((dev)->global_list.next))
#define card_for_each_dev(card,dev) \
	for((dev) = card_to_pnp_dev((card)->devices.next); \
	(dev) != card_to_pnp_dev(&(card)->devices); \
	(dev) = card_to_pnp_dev((dev)->card_list.next))
#define pnp_dev_name(dev) (dev)->dev.name

static inline void *pnp_get_drvdata (struct pnp_dev *pdev)
{
	return dev_get_drvdata(&pdev->dev);
}

static inline void pnp_set_drvdata (struct pnp_dev *pdev, void *data)
{
	dev_set_drvdata(&pdev->dev, data);
}

static inline void *pnp_get_protodata (struct pnp_dev *pdev)
{
	return pdev->protocol_data;
}

static inline void pnp_set_protodata (struct pnp_dev *pdev, void *data)
{
	pdev->protocol_data = data;
}

struct pnp_fixup {
	char id[7];
	void (*quirk_function)(struct pnp_dev *dev);	/* fixup function */
};

/* config modes */
#define PNP_CONFIG_AUTO		0x0001	/* Use the Resource Configuration Engine to determine resource settings */
#define PNP_CONFIG_MANUAL	0x0002	/* the config has been manually specified */
#define PNP_CONFIG_FORCE	0x0004	/* disables validity checking */
#define PNP_CONFIG_INVALID	0x0008	/* If this flag is set, the pnp layer will refuse to activate the device */

/* capabilities */
#define PNP_READ		0x0001
#define PNP_WRITE		0x0002
#define PNP_DISABLE		0x0004
#define PNP_CONFIGURABLE	0x0008
#define PNP_REMOVABLE		0x0010

#define pnp_can_read(dev)	(((dev)->protocol) && ((dev)->protocol->get) && \
				 ((dev)->capabilities & PNP_READ))
#define pnp_can_write(dev)	(((dev)->protocol) && ((dev)->protocol->set) && \
				 ((dev)->capabilities & PNP_WRITE))
#define pnp_can_disable(dev)	(((dev)->protocol) && ((dev)->protocol->disable) && \
				 ((dev)->capabilities & PNP_DISABLE))
#define pnp_can_configure(dev)	((!(dev)->active) && ((dev)->config_mode & PNP_CONFIG_AUTO) && \
				 ((dev)->capabilities & PNP_CONFIGURABLE))

#ifdef CONFIG_ISAPNP
extern struct pnp_protocol isapnp_protocol;
#define pnp_device_is_isapnp(dev) ((dev)->protocol == (&isapnp_protocol))
#else
#define pnp_device_is_isapnp(dev) 0
#endif

#ifdef CONFIG_PNPBIOS
extern struct pnp_protocol pnpbios_protocol;
#define pnp_device_is_pnpbios(dev) ((dev)->protocol == (&pnpbios_protocol))
#else
#define pnp_device_is_pnpbios(dev) 0
#endif


/* status */
#define PNP_READY		0x0000
#define PNP_ATTACHED		0x0001
#define PNP_BUSY		0x0002
#define PNP_FAULTY		0x0004

/* isapnp specific macros */

#define isapnp_card_number(dev)	((dev)->card ? (dev)->card->number : -1)
#define isapnp_csn_number(dev)  ((dev)->number)

/*
 * Driver Management
 */

struct pnp_id {
	char id[PNP_ID_LEN];
	struct pnp_id * next;
};

struct pnp_device_id {
	char id[PNP_ID_LEN];
	unsigned long driver_data;	/* data private to the driver */
};

struct pnp_card_device_id {
	char id[PNP_ID_LEN];
	unsigned long driver_data;	/* data private to the driver */
	struct {
		char id[PNP_ID_LEN];
	} devs[PNP_MAX_DEVICES];	/* logical devices */
};

struct pnp_driver {
	char * name;
	const struct pnp_device_id *id_table;
	unsigned int flags;
	int  (*probe)  (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
	void (*remove) (struct pnp_dev *dev);
	struct device_driver driver;
};

#define	to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver)

struct pnp_card_driver {
	struct list_head global_list;
	char * name;
	const struct pnp_card_device_id *id_table;
	unsigned int flags;
	int  (*probe)  (struct pnp_card_link *card, const struct pnp_card_device_id *card_id);
	void (*remove) (struct pnp_card_link *card);
	struct pnp_driver link;
};

#define	to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link)

/* pnp driver flags */
#define PNP_DRIVER_RES_DO_NOT_CHANGE	0x0001	/* do not change the state of the device */
#define PNP_DRIVER_RES_DISABLE		0x0003	/* ensure the device is disabled */


/*
 * Protocol Management
 */

struct pnp_protocol {
	struct list_head	protocol_list;
	char		      * name;

	/* resource control functions */
	int (*get)(struct pnp_dev *dev, struct pnp_resource_table *res);
	int (*set)(struct pnp_dev *dev, struct pnp_resource_table *res);
	int (*disable)(struct pnp_dev *dev);

	/* used by pnp layer only (look but don't touch) */
	unsigned char		number;		/* protocol number*/
	struct device		dev;		/* link to driver model */
	struct list_head	cards;
	struct list_head	devices;
};

#define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list)
#define protocol_for_each_card(protocol,card) \
	for((card) = protocol_to_pnp_card((protocol)->cards.next); \
	(card) != protocol_to_pnp_card(&(protocol)->cards); \
	(card) = protocol_to_pnp_card((card)->protocol_list.next))
#define protocol_for_each_dev(protocol,dev) \
	for((dev) = protocol_to_pnp_dev((protocol)->devices.next); \
	(dev) != protocol_to_pnp_dev(&(protocol)->devices); \
	(dev) = protocol_to_pnp_dev((dev)->protocol_list.next))


#if defined(CONFIG_PNP)

/* core */
int pnp_register_protocol(struct pnp_protocol *protocol);
void pnp_unregister_protocol(struct pnp_protocol *protocol);
int pnp_add_device(struct pnp_dev *dev);
void pnp_remove_device(struct pnp_dev *dev);
int pnp_device_attach(struct pnp_dev *pnp_dev);
void pnp_device_detach(struct pnp_dev *pnp_dev);
extern struct list_head pnp_global;

/* card */
int pnp_add_card(struct pnp_card *card);
void pnp_remove_card(struct pnp_card *card);
int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev);
void pnp_remove_card_device(struct pnp_dev *dev);
int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card);
struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char * id, struct pnp_dev * from);
void pnp_release_card_device(struct pnp_dev * dev);
int pnp_register_card_driver(struct pnp_card_driver * drv);
void pnp_unregister_card_driver(struct pnp_card_driver * drv);
extern struct list_head pnp_cards;

/* resource */
struct pnp_resources * pnp_build_resource(struct pnp_dev *dev, int dependent);
struct pnp_resources * pnp_find_resources(struct pnp_dev *dev, int depnum);
int pnp_get_max_depnum(struct pnp_dev *dev);
int pnp_add_irq_resource(struct pnp_dev *dev, int depnum, struct pnp_irq *data);
int pnp_add_dma_resource(struct pnp_dev *dev, int depnum, struct pnp_dma *data);
int pnp_add_port_resource(struct pnp_dev *dev, int depnum, struct pnp_port *data);
int pnp_add_mem_resource(struct pnp_dev *dev, int depnum, struct pnp_mem *data);
void pnp_init_resource_table(struct pnp_resource_table *table);
int pnp_generate_rule(struct pnp_dev * dev, int depnum, struct pnp_rule_table * rule);

/* manager */
int pnp_activate_dev(struct pnp_dev *dev);
int pnp_disable_dev(struct pnp_dev *dev);
void pnp_resource_change(struct resource *resource, unsigned long start, unsigned long size);
int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res, int mode);
int pnp_auto_config_dev(struct pnp_dev *dev);

/* driver */
int compare_pnp_id(struct pnp_id * pos, const char * id);
int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev);
int pnp_register_driver(struct pnp_driver *drv);
void pnp_unregister_driver(struct pnp_driver *drv);

/* support */
int pnp_is_active(struct pnp_dev * dev);
unsigned char * pnp_parse_current_resources(unsigned char * p, unsigned char * end, struct pnp_resource_table * res);
unsigned char * pnp_parse_possible_resources(unsigned char * p, unsigned char * end, struct pnp_dev * dev);
unsigned char * pnp_write_resources(unsigned char * p, unsigned char * end, struct pnp_resource_table * res);

#else

/* just in case anyone decides to call these without PnP Support Enabled */

/* core */
static inline int pnp_register_protocol(struct pnp_protocol *protocol) { return -ENODEV; }
static inline void pnp_unregister_protocol(struct pnp_protocol *protocol) { }
static inline int pnp_init_device(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_add_device(struct pnp_dev *dev) { return -ENODEV; }
static inline void pnp_remove_device(struct pnp_dev *dev) { }
static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { ; }

/* card */
static inline int pnp_add_card(struct pnp_card *card) { return -ENODEV; }
static inline void pnp_remove_card(struct pnp_card *card) { ; }
static inline int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev) { return -ENODEV; }
static inline void pnp_remove_card_device(struct pnp_dev *dev) { ; }
static inline int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card) { return -ENODEV; }
static inline struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char * id, struct pnp_dev * from) { return NULL; }
static inline void pnp_release_card_device(struct pnp_dev * dev) { ; }
static inline int pnp_register_card_driver(struct pnp_card_driver * drv) { return -ENODEV; }
static inline void pnp_unregister_card_driver(struct pnp_card_driver * drv) { ; }

/* resource */
static inline struct pnp_resources * pnp_build_resource(struct pnp_dev *dev, int dependent) { return NULL; }
static inline struct pnp_resources * pnp_find_resources(struct pnp_dev *dev, int depnum) { return NULL; }
static inline int pnp_get_max_depnum(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_add_irq_resource(struct pnp_dev *dev, int depnum, struct pnp_irq *data) { return -ENODEV; }
static inline int pnp_add_dma_resource(struct pnp_dev *dev, int depnum, struct pnp_irq *data) { return -ENODEV; }
static inline int pnp_add_port_resource(struct pnp_dev *dev, int depnum, struct pnp_irq *data) { return -ENODEV; }
static inline int pnp_add_mem_resource(struct pnp_dev *dev, int depnum, struct pnp_irq *data) { return -ENODEV; }
static inline void pnp_init_resource_table(struct pnp_resource_table *table) { ; }
static inline int pnp_generate_rule(struct pnp_dev * dev, int depnum, struct pnp_rule_table * rule) { return -ENODEV; }

/* manager */
static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline void pnp_resource_change(struct resource *resource, unsigned long start, unsigned long size) { ; }
static inline int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res, int mode) { return -ENODEV; }
static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; }

/* driver */
static inline int compare_pnp_id(struct list_head * id_list, const char * id) { return -ENODEV; }
static inline int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
static inline void pnp_unregister_driver(struct pnp_driver *drv) { ; }

/* support */
static inline int pnp_is_active(struct pnp_dev * dev) { return -ENODEV; }
static inline unsigned char * pnp_parse_current_resources(unsigned char * p, unsigned char * end, struct pnp_resource_table * res) { return NULL; }
static inline unsigned char * pnp_parse_possible_resources(unsigned char * p, unsigned char * end, struct pnp_dev * dev) { return NULL; }
static inline unsigned char * pnp_write_resources(unsigned char * p, unsigned char * end, struct pnp_resource_table * res) { return NULL; }

#endif /* CONFIG_PNP */


#define pnp_err(format, arg...) printk(KERN_ERR "pnp: " format "\n" , ## arg)
#define pnp_info(format, arg...) printk(KERN_INFO "pnp: " format "\n" , ## arg)
#define pnp_warn(format, arg...) printk(KERN_WARNING "pnp: " format "\n" , ## arg)

#ifdef DEBUG
#define pnp_dbg(format, arg...) printk(KERN_DEBUG "pnp: " format "\n" , ## arg)
#else
#define pnp_dbg(format, arg...) do {} while (0)
#endif

#endif /* __KERNEL__ */

#endif /* _LINUX_PNP_H */
