pnp.h

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/*
 * Linux Plug and Play Support
 * Copyright by Adam Belay <[email protected]>
 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
 *  Bjorn Helgaas <[email protected]>
 */

#ifndef _LINUX_PNP_H
#define _LINUX_PNP_H

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

#define PNP_NAME_LEN        50

struct pnp_protocol;
struct pnp_dev;

/*
 * Resource Management
 */
#ifdef CONFIG_PNP
struct resource *pnp_get_resource(struct pnp_dev *dev, unsigned long type,
                unsigned int num);
#else
static inline struct resource *pnp_get_resource(struct pnp_dev *dev,
            unsigned long type, unsigned int num)
{
    return NULL;
}
#endif

static inline int pnp_resource_valid(struct resource *res)
{
    if (res)
        return 1;
    return 0;
}

static inline int pnp_resource_enabled(struct resource *res)
{
    if (res && !(res->flags & IORESOURCE_DISABLED))
        return 1;
    return 0;
}

static inline resource_size_t pnp_resource_len(struct resource *res)
{
    if (res->start == 0 && res->end == 0)
        return 0;
    return resource_size(res);
}


static inline resource_size_t pnp_port_start(struct pnp_dev *dev,
                         unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);

    if (pnp_resource_valid(res))
        return res->start;
    return 0;
}

static inline resource_size_t pnp_port_end(struct pnp_dev *dev,
                       unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);

    if (pnp_resource_valid(res))
        return res->end;
    return 0;
}

static inline unsigned long pnp_port_flags(struct pnp_dev *dev,
                       unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);

    if (pnp_resource_valid(res))
        return res->flags;
    return IORESOURCE_IO | IORESOURCE_AUTO;
}

static inline int pnp_port_valid(struct pnp_dev *dev, unsigned int bar)
{
    return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IO, bar));
}

static inline resource_size_t pnp_port_len(struct pnp_dev *dev,
                       unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);

    if (pnp_resource_valid(res))
        return pnp_resource_len(res);
    return 0;
}


static inline resource_size_t pnp_mem_start(struct pnp_dev *dev,
                        unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);

    if (pnp_resource_valid(res))
        return res->start;
    return 0;
}

static inline resource_size_t pnp_mem_end(struct pnp_dev *dev,
                      unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);

    if (pnp_resource_valid(res))
        return res->end;
    return 0;
}

static inline unsigned long pnp_mem_flags(struct pnp_dev *dev, unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);

    if (pnp_resource_valid(res))
        return res->flags;
    return IORESOURCE_MEM | IORESOURCE_AUTO;
}

static inline int pnp_mem_valid(struct pnp_dev *dev, unsigned int bar)
{
    return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_MEM, bar));
}

static inline resource_size_t pnp_mem_len(struct pnp_dev *dev,
                      unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);

    if (pnp_resource_valid(res))
        return pnp_resource_len(res);
    return 0;
}


static inline resource_size_t pnp_irq(struct pnp_dev *dev, unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar);

    if (pnp_resource_valid(res))
        return res->start;
    return -1;
}

static inline unsigned long pnp_irq_flags(struct pnp_dev *dev, unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar);

    if (pnp_resource_valid(res))
        return res->flags;
    return IORESOURCE_IRQ | IORESOURCE_AUTO;
}

static inline int pnp_irq_valid(struct pnp_dev *dev, unsigned int bar)
{
    return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IRQ, bar));
}


static inline resource_size_t pnp_dma(struct pnp_dev *dev, unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar);

    if (pnp_resource_valid(res))
        return res->start;
    return -1;
}

static inline unsigned long pnp_dma_flags(struct pnp_dev *dev, unsigned int bar)
{
    struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar);

    if (pnp_resource_valid(res))
        return res->flags;
    return IORESOURCE_DMA | IORESOURCE_AUTO;
}

static inline int pnp_dma_valid(struct pnp_dev *dev, unsigned int bar)
{
    return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_DMA, bar));
}


/*
 * Device Management
 */

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 */

    char name[PNP_NAME_LEN];    /* contains a human-readable name */
    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))

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

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 */
    u64 dma_mask;
    unsigned int number;        /* used as an index, must be unique */
    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 */

    int active;
    int capabilities;
    unsigned int num_dependent_sets;
    struct list_head resources;
    struct list_head options;

    char name[PNP_NAME_LEN];    /* contains a human-readable name */
    int flags;          /* used by protocols */
    struct proc_dir_entry *procent; /* device entry in /proc/bus/isapnp */
    void *data;
};

#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)->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);
}

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

/* config parameters */
#define PNP_CONFIG_NORMAL   0x0001
#define PNP_CONFIG_FORCE    0x0002  /* disables validity checking */

/* 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->get) && \
                 ((dev)->capabilities & PNP_READ))
#define pnp_can_write(dev)  (((dev)->protocol->set) && \
                 ((dev)->capabilities & PNP_WRITE))
#define pnp_can_disable(dev)    (((dev)->protocol->disable) && \
                 ((dev)->capabilities & PNP_DISABLE))
#define pnp_can_configure(dev)  ((!(dev)->active) && \
                 ((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
extern struct mutex pnp_res_mutex;

#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

#ifdef CONFIG_PNPACPI
extern struct pnp_protocol pnpacpi_protocol;

static inline struct acpi_device *pnp_acpi_device(struct pnp_dev *dev)
{
    if (dev->protocol == &pnpacpi_protocol)
        return dev->data;
    return NULL;
}
#else
#define pnp_acpi_device(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_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);
    void (*shutdown) (struct pnp_dev *dev);
    int (*suspend) (struct pnp_dev *dev, pm_message_t state);
    int (*resume) (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);
    int (*suspend) (struct pnp_card_link *card, pm_message_t state);
    int (*resume) (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);
    int (*set) (struct pnp_dev *dev);
    int (*disable) (struct pnp_dev *dev);

    /* protocol specific suspend/resume */
    bool (*can_wakeup) (struct pnp_dev *dev);
    int (*suspend) (struct pnp_dev * dev, pm_message_t state);
    int (*resume) (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))

extern struct bus_type pnp_bus_type;

#if defined(CONFIG_PNP)

/* device management */
int pnp_device_attach(struct pnp_dev *pnp_dev);
void pnp_device_detach(struct pnp_dev *pnp_dev);
extern struct list_head pnp_global;
extern int pnp_platform_devices;

/* multidevice card support */
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 management */
int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base,
            resource_size_t size);
int pnp_auto_config_dev(struct pnp_dev *dev);
int pnp_start_dev(struct pnp_dev *dev);
int pnp_stop_dev(struct pnp_dev *dev);
int pnp_activate_dev(struct pnp_dev *dev);
int pnp_disable_dev(struct pnp_dev *dev);
int pnp_range_reserved(resource_size_t start, resource_size_t end);

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

#else

/* device management */
static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { }

#define pnp_platform_devices 0

/* multidevice card support */
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 management */
static inline int pnp_possible_config(struct pnp_dev *dev, int type,
                      resource_size_t base,
                      resource_size_t size) { return 0; }
static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
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 int pnp_range_reserved(resource_size_t start, resource_size_t end) { return 0;}

/* protocol helpers */
static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; }
static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
static inline void pnp_unregister_driver(struct pnp_driver *drv) { }

#endif /* CONFIG_PNP */

#endif /* _LINUX_PNP_H */