184 lines
5.8 KiB
C
184 lines
5.8 KiB
C
/*
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* Industry-pack bus.
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*
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* (C) 2011 Samuel Iglesias Gonsalvez <siglesia@cern.ch>, CERN
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* (C) 2012 Samuel Iglesias Gonsalvez <siglesias@igalia.com>, Igalia
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; version 2 of the License.
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*/
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#include <linux/device.h>
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#define IPACK_IDPROM_OFFSET_I 0x01
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#define IPACK_IDPROM_OFFSET_P 0x03
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#define IPACK_IDPROM_OFFSET_A 0x05
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#define IPACK_IDPROM_OFFSET_C 0x07
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#define IPACK_IDPROM_OFFSET_MANUFACTURER_ID 0x09
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#define IPACK_IDPROM_OFFSET_MODEL 0x0B
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#define IPACK_IDPROM_OFFSET_REVISION 0x0D
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#define IPACK_IDPROM_OFFSET_RESERVED 0x0F
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#define IPACK_IDPROM_OFFSET_DRIVER_ID_L 0x11
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#define IPACK_IDPROM_OFFSET_DRIVER_ID_H 0x13
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#define IPACK_IDPROM_OFFSET_NUM_BYTES 0x15
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#define IPACK_IDPROM_OFFSET_CRC 0x17
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struct ipack_bus_ops;
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struct ipack_driver;
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enum ipack_space {
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IPACK_IO_SPACE = 0,
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IPACK_ID_SPACE = 1,
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IPACK_MEM_SPACE = 2,
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};
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/**
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* struct ipack_addr_space - Virtual address space mapped for a specified type.
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*
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* @address: virtual address
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* @size: size of the mapped space
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*/
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struct ipack_addr_space {
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void __iomem *address;
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unsigned int size;
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};
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/**
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* struct ipack_device
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*
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* @bus_nr: IP bus number where the device is plugged
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* @slot: Slot where the device is plugged in the carrier board
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* @irq: IRQ vector
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* @driver: Pointer to the ipack_driver that manages the device
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* @bus: ipack_bus_device where the device is plugged to.
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* @id_space: Virtual address to ID space.
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* @io_space: Virtual address to IO space.
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* @mem_space: Virtual address to MEM space.
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* @dev: device in kernel representation.
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*
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* Warning: Direct access to mapped memory is possible but the endianness
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* is not the same with PCI carrier or VME carrier. The endianness is managed
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* by the carrier board throught bus->ops.
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*/
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struct ipack_device {
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unsigned int bus_nr;
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unsigned int slot;
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unsigned int irq;
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struct ipack_driver *driver;
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struct ipack_bus_device *bus;
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struct ipack_addr_space id_space;
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struct ipack_addr_space io_space;
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struct ipack_addr_space mem_space;
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struct device dev;
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};
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/**
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* struct ipack_driver_ops -- callbacks to mezzanine driver for installing/removing one device
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*
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* @match: Match function
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* @probe: Probe function
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* @remove: tell the driver that the carrier board wants to remove one device
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*/
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struct ipack_driver_ops {
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int (*match) (struct ipack_device *dev);
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int (*probe) (struct ipack_device *dev);
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void (*remove) (struct ipack_device *dev);
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};
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/**
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* struct ipack_driver -- Specific data to each ipack board driver
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*
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* @driver: Device driver kernel representation
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* @ops: Mezzanine driver operations specific for the ipack bus.
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*/
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struct ipack_driver {
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struct device_driver driver;
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struct ipack_driver_ops *ops;
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};
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/**
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* struct ipack_bus_ops - available operations on a bridge module
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*
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* @map_space: map IP address space
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* @unmap_space: unmap IP address space
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* @request_irq: request IRQ
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* @free_irq: free IRQ
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* @read8: read unsigned char
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* @read16: read unsigned short
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* @read32: read unsigned int
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* @write8: read unsigned char
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* @write16: read unsigned short
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* @write32: read unsigned int
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* @remove_device: tell the bridge module that the device has been removed
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*/
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struct ipack_bus_ops {
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int (*map_space) (struct ipack_device *dev, unsigned int memory_size, int space);
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int (*unmap_space) (struct ipack_device *dev, int space);
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int (*request_irq) (struct ipack_device *dev, int vector, int (*handler)(void *), void *arg);
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int (*free_irq) (struct ipack_device *dev);
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int (*read8) (struct ipack_device *dev, int space, unsigned long offset, unsigned char *value);
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int (*read16) (struct ipack_device *dev, int space, unsigned long offset, unsigned short *value);
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int (*read32) (struct ipack_device *dev, int space, unsigned long offset, unsigned int *value);
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int (*write8) (struct ipack_device *dev, int space, unsigned long offset, unsigned char value);
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int (*write16) (struct ipack_device *dev, int space, unsigned long offset, unsigned short value);
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int (*write32) (struct ipack_device *dev, int space, unsigned long offset, unsigned int value);
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int (*remove_device) (struct ipack_device *dev);
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};
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/**
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* struct ipack_bus_device
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*
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* @dev: pointer to carrier device
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* @slots: number of slots available
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* @bus_nr: ipack bus number
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* @ops: bus operations for the mezzanine drivers
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*/
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struct ipack_bus_device {
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struct device *parent;
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int slots;
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int bus_nr;
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struct ipack_bus_ops *ops;
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};
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/**
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* ipack_bus_register -- register a new ipack bus
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*
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* @parent: pointer to the parent device, if any.
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* @slots: number of slots available in the bus device.
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* @ops: bus operations for the mezzanine drivers.
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*
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* The carrier board device should call this function to register itself as
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* available bus device in ipack.
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*/
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struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots,
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struct ipack_bus_ops *ops);
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/**
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* ipack_bus_unregister -- unregister an ipack bus
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*/
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int ipack_bus_unregister(struct ipack_bus_device *bus);
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/**
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* ipack_driver_register -- Register a new driver
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*
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* Called by a ipack driver to register itself as a driver
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* that can manage ipack devices.
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*/
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int ipack_driver_register(struct ipack_driver *edrv, struct module *owner, char *name);
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void ipack_driver_unregister(struct ipack_driver *edrv);
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/**
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* ipack_device_register -- register a new mezzanine device
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*
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* @bus: ipack bus device it is plugged to.
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* @slot: slot position in the bus device.
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* @irqv: IRQ vector for the mezzanine.
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*
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* Register a new ipack device (mezzanine device). The call is done by
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* the carrier device driver.
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*/
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struct ipack_device *ipack_device_register(struct ipack_bus_device *bus, int slot, int irqv);
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void ipack_device_unregister(struct ipack_device *dev);
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