518 lines
15 KiB
C
518 lines
15 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Linux Plug and Play Support
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* Copyright by Adam Belay <ambx1@neo.rr.com>
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* Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*/
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#ifndef _LINUX_PNP_H
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#define _LINUX_PNP_H
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/mod_devicetable.h>
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#include <linux/console.h>
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#define PNP_NAME_LEN 50
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struct pnp_protocol;
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struct pnp_dev;
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/*
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* Resource Management
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*/
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#ifdef CONFIG_PNP
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struct resource *pnp_get_resource(struct pnp_dev *dev, unsigned long type,
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unsigned int num);
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#else
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static inline struct resource *pnp_get_resource(struct pnp_dev *dev,
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unsigned long type, unsigned int num)
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{
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return NULL;
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}
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#endif
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static inline int pnp_resource_valid(struct resource *res)
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{
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if (res)
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return 1;
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return 0;
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}
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static inline int pnp_resource_enabled(struct resource *res)
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{
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if (res && !(res->flags & IORESOURCE_DISABLED))
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return 1;
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return 0;
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}
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static inline resource_size_t pnp_resource_len(struct resource *res)
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{
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if (res->start == 0 && res->end == 0)
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return 0;
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return resource_size(res);
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}
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static inline resource_size_t pnp_port_start(struct pnp_dev *dev,
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unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
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if (pnp_resource_valid(res))
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return res->start;
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return 0;
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}
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static inline resource_size_t pnp_port_end(struct pnp_dev *dev,
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unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
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if (pnp_resource_valid(res))
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return res->end;
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return 0;
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}
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static inline unsigned long pnp_port_flags(struct pnp_dev *dev,
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unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
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if (pnp_resource_valid(res))
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return res->flags;
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return IORESOURCE_IO | IORESOURCE_AUTO;
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}
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static inline int pnp_port_valid(struct pnp_dev *dev, unsigned int bar)
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{
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return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IO, bar));
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}
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static inline resource_size_t pnp_port_len(struct pnp_dev *dev,
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unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
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if (pnp_resource_valid(res))
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return pnp_resource_len(res);
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return 0;
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}
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static inline resource_size_t pnp_mem_start(struct pnp_dev *dev,
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unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
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if (pnp_resource_valid(res))
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return res->start;
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return 0;
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}
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static inline resource_size_t pnp_mem_end(struct pnp_dev *dev,
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unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
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if (pnp_resource_valid(res))
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return res->end;
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return 0;
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}
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static inline unsigned long pnp_mem_flags(struct pnp_dev *dev, unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
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if (pnp_resource_valid(res))
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return res->flags;
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return IORESOURCE_MEM | IORESOURCE_AUTO;
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}
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static inline int pnp_mem_valid(struct pnp_dev *dev, unsigned int bar)
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{
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return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_MEM, bar));
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}
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static inline resource_size_t pnp_mem_len(struct pnp_dev *dev,
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unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
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if (pnp_resource_valid(res))
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return pnp_resource_len(res);
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return 0;
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}
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static inline resource_size_t pnp_irq(struct pnp_dev *dev, unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar);
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if (pnp_resource_valid(res))
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return res->start;
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return -1;
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}
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static inline unsigned long pnp_irq_flags(struct pnp_dev *dev, unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar);
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if (pnp_resource_valid(res))
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return res->flags;
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return IORESOURCE_IRQ | IORESOURCE_AUTO;
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}
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static inline int pnp_irq_valid(struct pnp_dev *dev, unsigned int bar)
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{
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return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IRQ, bar));
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}
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static inline resource_size_t pnp_dma(struct pnp_dev *dev, unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar);
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if (pnp_resource_valid(res))
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return res->start;
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return -1;
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}
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static inline unsigned long pnp_dma_flags(struct pnp_dev *dev, unsigned int bar)
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{
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struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar);
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if (pnp_resource_valid(res))
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return res->flags;
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return IORESOURCE_DMA | IORESOURCE_AUTO;
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}
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static inline int pnp_dma_valid(struct pnp_dev *dev, unsigned int bar)
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{
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return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_DMA, bar));
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}
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/*
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* Device Management
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*/
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struct pnp_card {
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struct device dev; /* Driver Model device interface */
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unsigned char number; /* used as an index, must be unique */
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struct list_head global_list; /* node in global list of cards */
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struct list_head protocol_list; /* node in protocol's list of cards */
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struct list_head devices; /* devices attached to the card */
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struct pnp_protocol *protocol;
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struct pnp_id *id; /* contains supported EISA IDs */
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char name[PNP_NAME_LEN]; /* contains a human-readable name */
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unsigned char pnpver; /* Plug & Play version */
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unsigned char productver; /* product version */
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unsigned int serial; /* serial number */
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unsigned char checksum; /* if zero - checksum passed */
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struct proc_dir_entry *procdir; /* directory entry in /proc/bus/isapnp */
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};
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#define global_to_pnp_card(n) list_entry(n, struct pnp_card, global_list)
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#define protocol_to_pnp_card(n) list_entry(n, struct pnp_card, protocol_list)
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#define to_pnp_card(n) container_of(n, struct pnp_card, dev)
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#define pnp_for_each_card(card) \
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list_for_each_entry(card, &pnp_cards, global_list)
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struct pnp_card_link {
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struct pnp_card *card;
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struct pnp_card_driver *driver;
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void *driver_data;
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pm_message_t pm_state;
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};
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static inline void *pnp_get_card_drvdata(struct pnp_card_link *pcard)
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{
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return pcard->driver_data;
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}
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static inline void pnp_set_card_drvdata(struct pnp_card_link *pcard, void *data)
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{
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pcard->driver_data = data;
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}
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struct pnp_dev {
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struct device dev; /* Driver Model device interface */
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u64 dma_mask;
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unsigned int number; /* used as an index, must be unique */
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int status;
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struct list_head global_list; /* node in global list of devices */
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struct list_head protocol_list; /* node in list of device's protocol */
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struct list_head card_list; /* node in card's list of devices */
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struct list_head rdev_list; /* node in cards list of requested devices */
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struct pnp_protocol *protocol;
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struct pnp_card *card; /* card the device is attached to, none if NULL */
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struct pnp_driver *driver;
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struct pnp_card_link *card_link;
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struct pnp_id *id; /* supported EISA IDs */
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int active;
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int capabilities;
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unsigned int num_dependent_sets;
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struct list_head resources;
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struct list_head options;
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char name[PNP_NAME_LEN]; /* contains a human-readable name */
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int flags; /* used by protocols */
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struct proc_dir_entry *procent; /* device entry in /proc/bus/isapnp */
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void *data;
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};
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#define global_to_pnp_dev(n) list_entry(n, struct pnp_dev, global_list)
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#define card_to_pnp_dev(n) list_entry(n, struct pnp_dev, card_list)
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#define protocol_to_pnp_dev(n) list_entry(n, struct pnp_dev, protocol_list)
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#define to_pnp_dev(n) container_of(n, struct pnp_dev, dev)
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#define pnp_for_each_dev(dev) list_for_each_entry(dev, &pnp_global, global_list)
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#define card_for_each_dev(card, dev) \
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list_for_each_entry(dev, &(card)->devices, card_list)
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#define pnp_dev_name(dev) (dev)->name
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static inline void *pnp_get_drvdata(struct pnp_dev *pdev)
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{
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return dev_get_drvdata(&pdev->dev);
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}
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static inline void pnp_set_drvdata(struct pnp_dev *pdev, void *data)
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{
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dev_set_drvdata(&pdev->dev, data);
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}
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struct pnp_fixup {
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char id[7];
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void (*quirk_function) (struct pnp_dev * dev); /* fixup function */
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};
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/* config parameters */
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#define PNP_CONFIG_NORMAL 0x0001
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#define PNP_CONFIG_FORCE 0x0002 /* disables validity checking */
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/* capabilities */
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#define PNP_READ 0x0001
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#define PNP_WRITE 0x0002
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#define PNP_DISABLE 0x0004
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#define PNP_CONFIGURABLE 0x0008
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#define PNP_REMOVABLE 0x0010
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#define PNP_CONSOLE 0x0020
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#define pnp_can_read(dev) (((dev)->protocol->get) && \
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((dev)->capabilities & PNP_READ))
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#define pnp_can_write(dev) (((dev)->protocol->set) && \
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((dev)->capabilities & PNP_WRITE))
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#define pnp_can_disable(dev) (((dev)->protocol->disable) && \
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((dev)->capabilities & PNP_DISABLE) && \
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(!((dev)->capabilities & PNP_CONSOLE) || \
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console_suspend_enabled))
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#define pnp_can_configure(dev) ((!(dev)->active) && \
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((dev)->capabilities & PNP_CONFIGURABLE))
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#define pnp_can_suspend(dev) (((dev)->protocol->suspend) && \
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(!((dev)->capabilities & PNP_CONSOLE) || \
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console_suspend_enabled))
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#ifdef CONFIG_ISAPNP
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extern struct pnp_protocol isapnp_protocol;
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#define pnp_device_is_isapnp(dev) ((dev)->protocol == (&isapnp_protocol))
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#else
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#define pnp_device_is_isapnp(dev) 0
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#endif
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extern struct mutex pnp_res_mutex;
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#ifdef CONFIG_PNPBIOS
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extern struct pnp_protocol pnpbios_protocol;
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extern bool arch_pnpbios_disabled(void);
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#define pnp_device_is_pnpbios(dev) ((dev)->protocol == (&pnpbios_protocol))
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#else
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#define pnp_device_is_pnpbios(dev) 0
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#define arch_pnpbios_disabled() false
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#endif
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#ifdef CONFIG_PNPACPI
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extern struct pnp_protocol pnpacpi_protocol;
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static inline struct acpi_device *pnp_acpi_device(struct pnp_dev *dev)
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{
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if (dev->protocol == &pnpacpi_protocol)
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return dev->data;
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return NULL;
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}
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#else
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#define pnp_acpi_device(dev) 0
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#endif
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/* status */
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#define PNP_READY 0x0000
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#define PNP_ATTACHED 0x0001
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#define PNP_BUSY 0x0002
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#define PNP_FAULTY 0x0004
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/* isapnp specific macros */
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#define isapnp_card_number(dev) ((dev)->card ? (dev)->card->number : -1)
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#define isapnp_csn_number(dev) ((dev)->number)
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/*
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* Driver Management
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*/
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struct pnp_id {
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char id[PNP_ID_LEN];
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struct pnp_id *next;
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};
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struct pnp_driver {
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char *name;
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const struct pnp_device_id *id_table;
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unsigned int flags;
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int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
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void (*remove) (struct pnp_dev *dev);
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void (*shutdown) (struct pnp_dev *dev);
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int (*suspend) (struct pnp_dev *dev, pm_message_t state);
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int (*resume) (struct pnp_dev *dev);
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struct device_driver driver;
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};
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#define to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver)
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struct pnp_card_driver {
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struct list_head global_list;
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char *name;
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const struct pnp_card_device_id *id_table;
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unsigned int flags;
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int (*probe) (struct pnp_card_link *card,
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const struct pnp_card_device_id *card_id);
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void (*remove) (struct pnp_card_link *card);
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int (*suspend) (struct pnp_card_link *card, pm_message_t state);
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int (*resume) (struct pnp_card_link *card);
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struct pnp_driver link;
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};
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#define to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link)
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/* pnp driver flags */
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#define PNP_DRIVER_RES_DO_NOT_CHANGE 0x0001 /* do not change the state of the device */
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#define PNP_DRIVER_RES_DISABLE 0x0003 /* ensure the device is disabled */
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/*
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* Protocol Management
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*/
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struct pnp_protocol {
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struct list_head protocol_list;
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char *name;
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/* resource control functions */
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int (*get) (struct pnp_dev *dev);
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int (*set) (struct pnp_dev *dev);
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int (*disable) (struct pnp_dev *dev);
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/* protocol specific suspend/resume */
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bool (*can_wakeup) (struct pnp_dev *dev);
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int (*suspend) (struct pnp_dev * dev, pm_message_t state);
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int (*resume) (struct pnp_dev * dev);
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/* used by pnp layer only (look but don't touch) */
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unsigned char number; /* protocol number */
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struct device dev; /* link to driver model */
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struct list_head cards;
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struct list_head devices;
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};
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#define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list)
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#define protocol_for_each_card(protocol, card) \
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list_for_each_entry(card, &(protocol)->cards, protocol_list)
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#define protocol_for_each_dev(protocol, dev) \
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list_for_each_entry(dev, &(protocol)->devices, protocol_list)
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extern struct bus_type pnp_bus_type;
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#if defined(CONFIG_PNP)
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/* device management */
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int pnp_device_attach(struct pnp_dev *pnp_dev);
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void pnp_device_detach(struct pnp_dev *pnp_dev);
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extern struct list_head pnp_global;
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extern int pnp_platform_devices;
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/* multidevice card support */
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struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
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const char *id, struct pnp_dev *from);
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void pnp_release_card_device(struct pnp_dev *dev);
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int pnp_register_card_driver(struct pnp_card_driver *drv);
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void pnp_unregister_card_driver(struct pnp_card_driver *drv);
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extern struct list_head pnp_cards;
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/* resource management */
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int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base,
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resource_size_t size);
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int pnp_auto_config_dev(struct pnp_dev *dev);
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int pnp_start_dev(struct pnp_dev *dev);
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int pnp_stop_dev(struct pnp_dev *dev);
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int pnp_activate_dev(struct pnp_dev *dev);
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int pnp_disable_dev(struct pnp_dev *dev);
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int pnp_range_reserved(resource_size_t start, resource_size_t end);
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/* protocol helpers */
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int pnp_is_active(struct pnp_dev *dev);
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int compare_pnp_id(struct pnp_id *pos, const char *id);
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int pnp_register_driver(struct pnp_driver *drv);
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void pnp_unregister_driver(struct pnp_driver *drv);
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#else
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/* device management */
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static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
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static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { }
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#define pnp_platform_devices 0
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/* multidevice card support */
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static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; }
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static inline void pnp_release_card_device(struct pnp_dev *dev) { }
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static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; }
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static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { }
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/* resource management */
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static inline int pnp_possible_config(struct pnp_dev *dev, int type,
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resource_size_t base,
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resource_size_t size) { return 0; }
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static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; }
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static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; }
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static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
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static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
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static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
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static inline int pnp_range_reserved(resource_size_t start, resource_size_t end) { return 0;}
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/* protocol helpers */
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static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
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static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; }
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static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
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static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
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#endif /* CONFIG_PNP */
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/**
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* module_pnp_driver() - Helper macro for registering a PnP driver
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* @__pnp_driver: pnp_driver struct
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*
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* Helper macro for PnP drivers which do not do anything special in module
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* init/exit. This eliminates a lot of boilerplate. Each module may only
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* use this macro once, and calling it replaces module_init() and module_exit()
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*/
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#define module_pnp_driver(__pnp_driver) \
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module_driver(__pnp_driver, pnp_register_driver, \
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pnp_unregister_driver)
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#endif /* _LINUX_PNP_H */
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