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9db2235326
Commit fc7a6209d5 ("bus: Make remove callback return void") forces
bus_type::remove be void-returned, it doesn't make much sense for any
bus based driver implementing remove callbalk to return non-void to
its caller.
This change is for macio bus based drivers.
Signed-off-by: Dawei Li <set_pte_at@outlook.com>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/TYCP286MB232391520CB471E7C8D6EA84CAD19@TYCP286MB2323.JPNP286.PROD.OUTLOOK.COM
146 lines
3.9 KiB
C
146 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __MACIO_ASIC_H__
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#define __MACIO_ASIC_H__
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#ifdef __KERNEL__
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#include <linux/of.h>
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#include <linux/platform_device.h>
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extern const struct bus_type macio_bus_type;
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/* MacIO device driver is defined later */
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struct macio_driver;
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struct macio_chip;
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#define MACIO_DEV_COUNT_RESOURCES 8
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#define MACIO_DEV_COUNT_IRQS 8
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/*
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* the macio_bus structure is used to describe a "virtual" bus
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* within a MacIO ASIC. It's typically provided by a macio_pci_asic
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* PCI device, but could be provided differently as well (nubus
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* machines using a fake OF tree).
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*
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* The pdev field can be NULL on non-PCI machines
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*/
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struct macio_bus
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{
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struct macio_chip *chip; /* macio_chip (private use) */
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int index; /* macio chip index in system */
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#ifdef CONFIG_PCI
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struct pci_dev *pdev; /* PCI device hosting this bus */
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#endif
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};
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/*
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* the macio_dev structure is used to describe a device
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* within an Apple MacIO ASIC.
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*/
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struct macio_dev
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{
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struct macio_bus *bus; /* macio bus this device is on */
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struct macio_dev *media_bay; /* Device is part of a media bay */
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struct platform_device ofdev;
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struct device_dma_parameters dma_parms; /* ide needs that */
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int n_resources;
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struct resource resource[MACIO_DEV_COUNT_RESOURCES];
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int n_interrupts;
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struct resource interrupt[MACIO_DEV_COUNT_IRQS];
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};
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#define to_macio_device(d) container_of(d, struct macio_dev, ofdev.dev)
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#define of_to_macio_device(d) container_of(d, struct macio_dev, ofdev)
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extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
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extern void macio_dev_put(struct macio_dev *dev);
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/*
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* Accessors to resources & interrupts and other device
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* fields
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*/
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static inline int macio_resource_count(struct macio_dev *dev)
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{
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return dev->n_resources;
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}
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static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
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{
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return dev->resource[resource_no].start;
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}
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static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
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{
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return dev->resource[resource_no].end;
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}
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static inline unsigned long macio_resource_len(struct macio_dev *dev, int resource_no)
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{
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struct resource *res = &dev->resource[resource_no];
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if (res->start == 0 || res->end == 0 || res->end < res->start)
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return 0;
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return resource_size(res);
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}
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extern int macio_enable_devres(struct macio_dev *dev);
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extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
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extern void macio_release_resource(struct macio_dev *dev, int resource_no);
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extern int macio_request_resources(struct macio_dev *dev, const char *name);
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extern void macio_release_resources(struct macio_dev *dev);
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static inline int macio_irq_count(struct macio_dev *dev)
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{
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return dev->n_interrupts;
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}
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static inline int macio_irq(struct macio_dev *dev, int irq_no)
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{
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return dev->interrupt[irq_no].start;
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}
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static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
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{
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dev_set_drvdata(&dev->ofdev.dev, data);
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}
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static inline void* macio_get_drvdata(struct macio_dev *dev)
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{
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return dev_get_drvdata(&dev->ofdev.dev);
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}
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static inline struct device_node *macio_get_of_node(struct macio_dev *mdev)
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{
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return mdev->ofdev.dev.of_node;
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}
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#ifdef CONFIG_PCI
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static inline struct pci_dev *macio_get_pci_dev(struct macio_dev *mdev)
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{
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return mdev->bus->pdev;
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}
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#endif
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/*
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* A driver for a mac-io chip based device
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*/
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struct macio_driver
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{
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int (*probe)(struct macio_dev* dev, const struct of_device_id *match);
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void (*remove)(struct macio_dev *dev);
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int (*suspend)(struct macio_dev* dev, pm_message_t state);
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int (*resume)(struct macio_dev* dev);
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int (*shutdown)(struct macio_dev* dev);
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#ifdef CONFIG_PMAC_MEDIABAY
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void (*mediabay_event)(struct macio_dev* dev, int mb_state);
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#endif
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struct device_driver driver;
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};
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#define to_macio_driver(drv) container_of(drv,struct macio_driver, driver)
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extern int macio_register_driver(struct macio_driver *);
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extern void macio_unregister_driver(struct macio_driver *);
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#endif /* __KERNEL__ */
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#endif /* __MACIO_ASIC_H__ */
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